Technical field
[0001]The present invention relates to a hollow member.
Background technology
[0002]One of the methods of forming a structure such as an automobile, a railroad vehicle, an aircraft or a building is a method of forming a structure with a frame corresponding to a skeleton and other structural members (outer skin or the like). Such a frame is typically required to have high strength and light weight from the viewpoint of improving the strength of the structure and suppressing the cost. For example, regarding automobiles, from the viewpoints of maintaining or improving collision safety performance and improving fuel efficiency, the strength and thickness of the steel plate forming the frame have been increased.
[0003]
　In addition, a filling member formed of a foamed resin material or the like may be filled inside the frame in order to suppress deformation of the frame in the event of a collision of an automobile. For example, Patent Document 1 below discloses a technique in which a filling member is arranged inside a frame without a gap.
Advanced technical literature
Patent literature
[0004]
Patent Document 1: Japanese Patent Laid-Open No. 2002-18868
Summary of the invention
Problems to be Solved by the Invention
[0005]
　When a load is applied to the frame, such as during a car collision, the frame deforms. At this time, the cross section of the frame is deformed. This deformation is called cross-sectional deformation. When the load applied to the frame exceeds a predetermined value, buckling occurs in the frame and the load bearing performance of the frame is significantly reduced. Buckling means bending. In this case, there is a possibility that the expected energy absorption amount of the frame cannot be secured.
[0006]
　It is considered that the cross-sectional deformation of the frame is suppressed by filling the inner space of the frame with the filling member. However, if the filling member is unnecessarily filled as in the technique described in Patent Document 1, the weight of the frame is increased at the cost of improving the energy absorption amount.
[0007]
　Therefore, the present inventors have considered that it is useful to further improve the mass efficiency with respect to the improvement of the energy absorption amount by the filling member and suppress the out-of-plane deformation that causes a decrease in the energy absorption amount of the frame. However, the effective arrangement of the filling member for suppressing the out-of-plane deformation and improving the energy absorption amount of the frame has not been studied so far.
[0008]
　The present invention has been made in view of the above problems. It is an object of the present invention to provide a new and improved hollow member that realizes energy absorption at the time of load input with high mass efficiency.
Means for solving the problem
[0009]
　According to the present invention, in order to solve the above-mentioned problems, according to the present invention, a hollow metal member having a bend-inducing portion in a part in the longitudinal direction and a resin having a Young's modulus of 20 MPa or more are adhered to the metal member to bend the metal member. There is provided a hollow member including a resin material arranged in the induction part.
[0010]
　The metal member has a bottom wall portion, a pair of side wall portions standing up from both ends of the bottom wall portion, and a ceiling wall portion facing the bottom wall portion, the bottom wall portion, the pair of side wall portions. A closed cross section may be formed by the top wall portion.
[0011]
　The resin material may be disposed in close contact with the inner surface of at least one of the bottom wall portion and the top wall portion.
[0012]
　The resin material may be disposed in close contact with the inner surface of at least one of the pair of side wall portions.
[0013]
　A second metal plate may be arranged on the inner side of the metal member so as to be joined to the first metal plate forming the metal member.
[0014]
　The resin material may be disposed in close contact with the second metal plate.
[0015]
　The first metal plate forming the metal member has a hole portion, the resin material is made of foamed resin, and the resin material penetrates the hole portion and both the outer surface and the inner surface of the first metal plate. May be placed in close contact with.
[0016]
　The hole edge of the hole may be located inward of the metal member with respect to the first metal plate forming the metal member.
[0017]
　The hole may be a burring hole in which a hole edge of the first metal plate forming the metal member protrudes from the outside toward the inside.
[0018]
　The hole may be provided with a recess that is recessed inward of the metal member than the first metal plate that forms the metal member, and the hole may be provided inside the recess. ..
[0019]
　The bending inducing portion may be a portion in which the total plastic moment of the metal member changes in the longitudinal direction.
[0020]
　The bending inducing portion may be a portion in which a radius of curvature of a locus of the center of gravity along the longitudinal direction, which is formed by the center of gravity of the cross section of the metal member, is 260 mm or less.
[0021]
　The bending inducing portion may be a plate thickness changing portion.
[0022]
　The bend inducing portion may be a portion provided with a recess.
[0023]
　The bend inducing portion may be a portion provided with a convex portion.
[0024]
　The bending inducing portion may be a portion provided with a hole.
[0025]
　The resin material may be arranged so as to cover the bending inducing portion and peripheral portions on both sides in the longitudinal direction of the bending inducing portion.
[0026]
　Within a range in which the distance from the bend inducing portion to the end of the resin material in the longitudinal direction is ½ or less of the cross-sectional height of the metal member, the resin material is the bend inducing portion, and You may arrange|position so that the peripheral part of the said longitudinal direction both sides of the said bending induction part may be covered.
[0027]
　In the cross-section of the metal member, the resin material has the bend-inducing portion from a boundary that divides the cross-section into two equal parts in a height direction of the cross-section defined by a direction from the center of gravity of the cross-section toward the bend-inducing portion. It may be arranged on the side.
[0028]
　The resin material may be arranged in a part of the bend inducing portion and may not be arranged in another part of the bend inducing portion.
[0029]
　According to the above configuration, while bending deformation is induced by the bending inducing portion when a load is input, the resin material arranged in the bending inducing portion suppresses out-of-plane deformation that occurs in the bending inducing portion when the bending deformation occurs. You can As a result, the out-of-plane deformation of the hollow member at the time of inputting a load is suppressed, so that the load bearing performance exhibited by the cross section of the hollow member can be maintained at the level expected at the design stage. Therefore, the amount of energy absorbed when a load is input can be improved. Further, since the place where the out-of-plane deformation should be suppressed is limited to the bending inducing portion or its periphery, the energy absorption amount at the time of inputting the load can be improved with high mass efficiency.
The invention's effect
[0030]
　As described above, according to the present invention, energy absorption at the time of load input can be realized with high mass efficiency.
Brief description of the drawings
[0031]
FIG. 1 is a schematic configuration diagram of a vehicle for explaining an application target of a frame according to an embodiment of the present invention.
FIG. 2 is a perspective view showing a schematic configuration of an example of a frame according to the first embodiment of the present invention.
FIG. 3 is a cross-sectional view showing a cross section orthogonal to the Y-axis direction of an example of the hollow member according to the same embodiment.
FIG. 4 is a schematic diagram in which the locus of the center of gravity of the cross section of the hollow member is visualized.
FIG. 5 is a cross-sectional view in a cross section orthogonal to the Z-axis direction of an example of the frame according to the same embodiment.
6 is a cross-sectional view taken along the line II-II of the frame shown in FIG.
FIG. 7 is a cross-sectional view taken along the line III-III of the frame shown in FIG.
FIG. 8 is a cross-sectional view of a frame for explaining a first arrangement example of filling members according to the same embodiment.
FIG. 9 is a cross-sectional view of a frame for explaining a second arrangement example of the filling member according to the same embodiment.
FIG. 10 is a cross-sectional view of a frame for explaining a third arrangement example of the filling member according to the same embodiment.
FIG. 11 is a perspective view showing a schematic configuration of an example of a frame according to a second embodiment of the present invention.
FIG. 12 is a cross-sectional view showing a cross section orthogonal to the Z-axis direction of an example of the frame according to the same embodiment.
13 is a cross-sectional view taken along the line VV of the frame shown in FIG.
14 is a cross-sectional view taken along the line VI-VI of the frame shown in FIG.
FIG. 15 is a cross-sectional view of a frame for explaining a first arrangement example of filling members according to the same embodiment.
FIG. 16 is a sectional view of a frame for explaining a second arrangement example of the filling member according to the same embodiment.
FIG. 17 is a cross-sectional view of a frame for explaining a third arrangement example of filling members according to the same embodiment.
FIG. 18 is a cross-sectional view of a frame for explaining a modification of the second arrangement example of the filling member according to the same embodiment.
FIG. 19 is a cross-sectional view of a frame for explaining a modified example of the third arrangement example of the filling member according to the same embodiment.
FIG. 20 is a cross-sectional view of a frame for explaining a fourth arrangement example of the filling member according to the same embodiment.
FIG. 21 is a perspective view showing a schematic configuration of an example of a frame according to a third embodiment of the present invention.
FIG. 22 is a cross-sectional view showing a cross section orthogonal to the Z-axis direction of an example of the frame according to the same embodiment.
23 is a cross-sectional view taken along the line VIII-VIII of the frame shown in FIG.
FIG. 24 is a cross-sectional view of the frame for explaining the first arrangement example of the filling member according to the same embodiment.
FIG. 25 is a cross-sectional view of a frame for explaining a second arrangement example of the filling member according to the same embodiment.
FIG. 26 is a cross-sectional view of the frame for explaining a third arrangement example of the filling member according to the same embodiment.
FIG. 27 is a cross-sectional view of the frame for explaining the fourth arrangement example of the filling member according to the same embodiment.
FIG. 28 is a cross-sectional view of the frame for explaining a fifth arrangement example of the filling member according to the same embodiment.
FIG. 29 is a cross-sectional view of a frame for explaining a modification of the fourth arrangement example and the fifth arrangement example of the filling member according to the same embodiment.
FIG. 30 is a partial cross-sectional view showing a configuration example of an example of a frame according to the fourth embodiment of the present invention.
FIG. 31 is a partial cross-sectional view showing an example of the operation of an example of the frame according to the same embodiment.
FIG. 32 is a partial cross-sectional view showing a configuration example of a frame according to a first modified example of the same embodiment.
FIG. 33 is a partial cross-sectional view showing an example of the action of the frame according to the modified example.
FIG. 34 is a partial cross-sectional view showing a configuration example of a frame according to a second modified example of the same embodiment.
FIG. 35 is a partial cross-sectional view showing a configuration example of a frame according to a third modified example of the same embodiment.
FIG. 36 is a partial cross-sectional view showing a configuration example of a frame according to a fourth modified example of the same embodiment.
FIG. 37 is a partial cross-sectional view showing a configuration example of a frame according to a fifth modified example of the same embodiment.
FIG. 38 is a perspective view showing a schematic configuration of an example of a frame according to a fourth embodiment of the present invention.
FIG. 39 is a cross-sectional view of the example of the frame according to the embodiment in a cross section orthogonal to the Z-axis direction.
40 is a sectional view taken along the line XIII-XIII of the frame shown in FIG. 39.
41 is a cross-sectional view taken along the line XIV-XIV of the frame shown in FIG.
FIG. 42 is a cross-sectional view of a frame for explaining an example of a hole provided in the hollow member according to the embodiment.
FIG. 43 is a cross-sectional view of a frame for explaining a modified example of the filling member provided to face the hole according to the embodiment.
FIG. 44 is a cross-sectional view of the frame for explaining an example of the hole provided in the hollow member according to the embodiment.
FIG. 45 is a cross-sectional view of a frame for explaining an example of a hole provided in the hollow member according to the embodiment.
FIG. 46 is a schematic diagram showing another example of the hole provided in the hollow member according to the embodiment.
FIG. 47 is a schematic diagram showing another example of the hole provided in the hollow member according to the embodiment.
FIG. 48 is a schematic diagram showing another example of the hole provided in the hollow member according to the embodiment.
FIG. 49 is a schematic diagram showing another example of the hole provided in the hollow member according to the embodiment.
FIG. 50 is a cross-sectional view of a frame for explaining an example of a bead portion provided in the hollow member according to the embodiment.
FIG. 51 is a cross-sectional view of a frame for explaining an example of a bead portion provided in the hollow member according to the embodiment.
FIG. 52 is a cross-sectional view of a frame for explaining an example of a bead portion provided in the hollow member according to the embodiment.
FIG. 53 is a schematic view showing another example of the recess provided in the hollow member according to the embodiment.
FIG. 54 is a schematic diagram showing another example of the recess provided in the hollow member according to the embodiment.
FIG. 55 is a schematic diagram showing another example of a recess provided in the hollow member according to one embodiment.
FIG. 56 is a schematic diagram showing another example of a recess provided in the hollow member according to the embodiment.
FIG. 57 is a schematic diagram showing an example of the shape and size of the recess according to the embodiment.
FIG. 58 is a schematic diagram showing another example of a recess provided in the hollow member according to the embodiment.
FIG. 59 is a cross-sectional view of a frame for explaining an example of a convex portion provided in the hollow member according to the embodiment.
FIG. 60 is a cross-sectional view of a frame for explaining an example of a convex portion provided in the hollow member according to the embodiment.
FIG. 61 is a cross-sectional view of a frame for explaining an example of a convex portion provided in the hollow member according to the embodiment.
FIG. 62 is a schematic diagram showing another example of the protrusion provided on the hollow member according to the embodiment.
FIG. 63 is a schematic view showing another example of the convex portion provided on the hollow member according to the embodiment.
FIG. 64 is a schematic view showing another example of the convex portion provided on the hollow member according to the embodiment.
FIG. 65 is a schematic view showing another example of the convex portion provided on the hollow member according to the embodiment.
FIG. 66 is a schematic diagram showing an example of the shape and size of the convex portion according to the embodiment.
FIG. 67 is a schematic view showing another example of the convex portion provided in the hollow member according to the embodiment.
FIG. 68 is a schematic diagram showing an example of the plate thickness changing portion provided in the hollow member according to the embodiment.
FIG. 69 is a schematic diagram showing an example of a thin portion provided in the hollow member according to the embodiment.
FIG. 70 is a cross-sectional view of a frame for explaining an example of the different strength portion provided in the hollow member according to the embodiment.
FIG. 71 is a cross-sectional view of a frame for explaining an example of the different strength portion provided in the hollow member according to the embodiment.
FIG. 72 is a cross-sectional view of a frame for explaining an example of the different strength portion provided in the hollow member according to the embodiment.
FIG. 73 is a schematic diagram showing another example of the different strength portion provided in the hollow member according to the embodiment.
FIG. 74 is a schematic view showing another example of the different strength portion provided in the hollow member according to the embodiment.
FIG. 75 is a schematic diagram showing an example of a strength changing portion provided in the hollow member according to the embodiment.
FIG. 76 is a cross-sectional view of a frame for explaining an example of a combination of a bent portion and a hole provided in the hollow member according to one embodiment.
FIG. 77 is a cross-sectional view of a frame for explaining an example of a combination of a bent portion and a hole provided in the hollow member according to one embodiment.
FIG. 78 is a cross-sectional view of a frame for explaining an example of a combination of a bent portion and a hole provided in the hollow member according to the embodiment.
[FIG. 79] FIG. 79 is a cross-sectional view of a frame showing a configuration example in which reinforcements are arranged side by side in the longitudinal direction in the hollow member according to one embodiment while being spaced apart in the longitudinal direction.
FIG. 80 is a cross-sectional view showing a cross section of a first example of a hollow member according to another embodiment of the present invention, the cross section being orthogonal to the longitudinal direction.
FIG. 81 is a cross-sectional view showing a cross section of the second example of the hollow member according to another embodiment of the present invention, the cross section being orthogonal to the longitudinal direction.
FIG. 82 is a cross-sectional view showing a cross section of the third example of the hollow member according to another embodiment of the present invention, the cross section being orthogonal to the longitudinal direction.
FIG. 83 is a cross-sectional view showing a specific example of the bending inducing portion (bending portion) and the filling member provided in the frame.
FIG. 84 is a cross-sectional view showing another specific example of the bending inducing portion (bent portion) provided in the frame and the filling member.
FIG. 85 is a cross-sectional view showing an example of a hollow member.
FIG. 86 is a cross-sectional view showing another example of the hollow member.
FIG. 87 is a cross-sectional view showing a specific example of the bending inducing portion (hole portion) and the filling member provided in the frame.
FIG. 88 is a cross-sectional view showing a specific example of the bending inducing portion (recess) and the filling member provided in the frame.
FIG. 89 is a cross-sectional view showing a specific example of the bending inducing portion (convex portion) and the filling member provided in the frame.
[Fig. 90] Fig. 90 is a cross-sectional view showing a specific example of the bending-inducing portion (sheet-thickness changing portion) and the filling member provided in the frame.
FIG. 91 is a cross-sectional view showing a specific example of the bending inducing portion (different strength portion) and the filling member provided in the frame.
FIG. 92 is a plan view showing a specific example of the frame when viewed in the X-axis direction.
FIG. 93 is a plan view showing another specific example of the frame when viewed from the X-axis direction.
FIG. 94 is a plan view showing another specific example of the frame when viewed from the X-axis direction.
FIG. 95 is a cross-sectional view showing a specific example of the frame and the filling member in a cross section orthogonal to the Y-axis direction.
FIG. 96 is a cross-sectional view showing a specific example of the frame and the filling member in a cross section orthogonal to the Y-axis direction.
FIG. 97 is a cross-sectional view showing a specific example of the frame and the filling member in a cross section orthogonal to the Y-axis direction.
FIG. 98 is a cross-sectional view showing a specific example of the frame and the filling member in a cross section orthogonal to the Y-axis direction.
FIG. 99 is a diagram showing changes in cross-sectional shape at the bent portion of the frames according to Comparative Example 2 and Example 1 according to the first embodiment of the present invention before and after a collision simulation.
FIG. 100 is a diagram showing changes in cross-sectional shape at the bent portion of the frames according to Comparative Example 2 and Example 1 according to the same embodiment before and after the collision simulation.
[FIG. 101] FIG. 101 is a diagram illustrating an example of E.I. A. It is a graph which shows.
FIG. 102 is a diagram illustrating the case where the E.E. A. It is a graph which shows stroke St14kJ to =14kJ.
FIG. 103 is a graph showing an improvement margin of the stroke St14kJ of the frames according to Comparative Example 2, Comparative Example 3, and Example 1 with respect to the stroke St14kJ of the frame according to Comparative Example 1 according to the same embodiment.
FIG. 104 is a top view showing a configuration of a sample used in the cross tension test according to Example 1 and Example 2 according to the fourth embodiment of the present invention.
FIG. 105 is a lateral cross-sectional view showing the configuration of the sample according to Example 1 according to the same embodiment.
FIG. 106 is a lateral cross-sectional view showing the structure of the sample according to Example 2 of the same embodiment.
FIG. 107 is a lateral cross-sectional view showing the configuration of a sample according to a comparative example of the same embodiment.
FIG. 108 is a graph showing the maximum load of each sample measured by the cross tension test according to the same embodiment.
[FIG. 109] FIG. 109 is a diagram for explaining simulation settings of an example regarding an arrangement range of a filling member.
FIG. 110 is a diagram showing a list of sectional views before and after deformation of Examples 1 to 5 and Reference Example 1 regarding an arrangement range of a filling member.
FIG. 111 is a graph showing the absorbed energy ratio, which is the ratio of the energy absorption amount when the energy absorption amount of Reference Example 1 is 1 in Examples 1 to 5 and Reference Example 1 regarding the arrangement range of the filling member. is there.
FIG. 112 is a view showing a list of cross-sectional views before and after deformation of Examples 6 to 10 and Reference Example 2 regarding the arrangement range of the filling member.
FIG. 113 is a graph showing the absorbed energy ratio, which is the ratio of the energy absorption amount when the energy absorption amount of Reference Example 2 is set to 1 in Examples 6 to 10 and Reference Example 2 regarding the arrangement range of the filling member. is there.
FIG. 114 is a plan view of the hollow member of the example relating to the total plastic moment changing portion.
FIG. 115 is a graph showing changes in the total plastic moment ratio in the longitudinal direction of the hollow members according to the examples and the reference examples regarding the total plastic moment changing portion.
FIG. 116 is a diagram showing a region in which bending deformation of the hollow member according to the reference example regarding the all-plastic-moment changing portion occurs.
FIG. 117 is a diagram showing a region in which bending deformation of the hollow member according to Example 1 relating to the all-plastic-moment changing portion has occurred.
FIG. 118 is a diagram showing a region in which bending deformation of the hollow member according to Example 2 relating to the all-plastic-moment changing portion has occurred.
FIG. 119 is a diagram showing a region in which bending deformation of a hollow member according to Example 3 related to an all-plastic-moment changing portion occurs.
FIG. 120 is a graph showing a change in the longitudinal direction of the total plastic moment ratio and a position where bending deformation occurs in the hollow members according to the examples and the reference examples regarding the total plastic moment changing portion.
FIG. 121 is a side view of the frame of the example regarding the Young's modulus of the filling member.
FIG. 122 is a plan view of the frame shown in FIG. 121.
FIG. 123 is a sectional view taken along the line A1-A1 of the frame shown in FIG. 122.
FIG. 124 is a sectional view taken along the line A2-A2 of the frame shown in FIG. 122.
FIG. 125 is a graph showing the relationship between the density of the filling member according to the example regarding the Young's modulus of the filling member, and the yield stress and Young's modulus.
FIG. 126 is a diagram showing a list of deformation behaviors of Examples and Reference Examples regarding Young's modulus of a filling member.
FIG. 127 is a graph showing a reaction force and a stroke at the time of deformation of each example and the reference example regarding the Young's modulus of the filling member.
FIG. 128 is a graph showing the amount of collision energy absorption in each Example and Reference Example regarding the Young's modulus of the filling member.
FIG. 129 is a cross-sectional view showing an example of a change in cross-sectional shape of a thinned frame.
FIG. 130 is a cross-sectional view showing another example of changes in the cross-sectional shape of the thinned frame.
FIG. 131 is a partial cross-sectional view showing a structural example of a frame in which a filling member is arranged.
FIG. 132 is a partial cross-sectional view showing an example of the action of the frame in which the filling member is arranged.
MODE FOR CARRYING OUT THE INVENTION
[0032]
　Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In this specification and the drawings, components having substantially the same functional configuration are designated by the same reference numerals, and duplicate description will be omitted.
[0033]
　<<1. Application Target of Hollow Member>>
　The hollow member according to the embodiment of the present invention can be used as various structural members. In this specification, as an example, a case where the hollow member according to the embodiment is used as a vehicle structural member in a vehicle frame will be described. Hereinafter, the vehicle frame is simply referred to as a frame.
[0034]
　FIG. 1 is a schematic configuration diagram of an automobile for explaining an application target of a frame according to the present embodiment. A vehicle body provided in a vehicle 1000 such as a general automobile shown in FIG. 1 can be classified into a front structure (FRONT), a rear structure (REAR), and a cabin structure (CABIN).
[0035]
　The front structure and the rear structure are also called "crushable zones", and have a function of absorbing and absorbing a shock to the vehicle (shock absorbing function). The crushable zone is crushed by collision energy at the time of vehicle collision. That is, in order to ensure the safety of an occupant riding in the cabin at the time of a vehicle collision, the front structure and the rear structure are required to have a structure that absorbs energy (collision energy) generated by the collision. Therefore, the frames forming the front structure and the rear structure are required to absorb the collision energy even when bending or crushing occurs during the collision. The frame used for the front structure and the rear structure is, for example, a front side member, a rear side member, a bumper reinforcement, a crash box, or the like. The front side member includes a front side member rear that constitutes a rear end portion and a front side member front that constitutes a front side portion of the rear end portion. The rear side member includes a rear side member rear that constitutes a rear end portion, and a rear side member front that constitutes a portion on the front side of the rear end portion.
[0036]
　On the other hand, the cabin structure is also called a "safety zone" and has a function (passenger protection function) of ensuring the safety of an occupant who is on board the vehicle in the event of a vehicle collision. That is, in order to ensure the safety of the occupants in the event of a vehicle collision, the cabin structure is required to be a structure that is unlikely to be crushed by an impact force. Therefore, the frame constituting the cabin structure is required to be hard to be deformed and to have high load bearing performance. The frame used for the cabin structure is, for example, a front pillar (A pillar), a center pillar (B pillar), a rear pillar (C pillar, D pillar), a front pillar lower (A pillar lower), a side sill, a roof rail, a cross member, and Such as a tunnel.
[0037]
　By the way, in order to maintain both the collision safety performance and the weight reduction of a vehicle, the structural material (for example, a steel plate) forming the vehicle body structure has been made stronger and thinner. As for the frames forming the front structure, the rear structure, and the cabin structure described above, replacement with thin high-strength steel plates is being promoted. For replacement, at least one of the amount of collision energy absorption and load bearing performance is required to be equivalent to that of the conventional frame. The plate thickness of the frame formed of the high strength steel plate can be made thinner than that of the frame formed of the conventional steel plate. It is believed that this makes it possible to reduce the weight of the frame while maintaining the collision performance of the high-strength frame equal to that of the conventional frame.
[0038]
　However, if a collision occurs in the longitudinal direction with respect to the thinned frame, and the cross-sectional deformation of the frame becomes large when the frame is bent, it may not be possible to ensure the collision safety performance expected for the frame. The present inventors have found that there is. Buckling often occurs as the plate thickness of the frame decreases.
[0039]
　FIG. 129 is a cross-sectional view showing an example of changes in the cross-sectional shape of the thinned frame 900. As shown in FIG. 129, when a collision load is applied in the longitudinal direction (Y-axis direction) of the frame 900 and the frame 900 is bent, the bottom wall portion 900a swells in the out-of-plane direction, and the side wall portion 900b forms a surface. It deforms so as to bend outward (cross-sectional shape 901). The bottom wall portion 900a is on the inside of the bend. When the bending further progresses, the bottom wall portion 900a and the side wall portion 900b are further deformed in the out-of-plane direction. As a result, the frame 900 buckles. The cross-sectional shape 902 of the buckled frame 900 deviates significantly from the original cross-sectional shape.
[0040]
　Further, FIG. 130 is a cross-sectional view showing another example of changes in the cross-sectional shape of the thinned frame 910. As shown in FIG. 130, when a collision load is applied in the longitudinal direction (Y-axis direction) of the frame 910 or a collision load is applied in a direction perpendicular to the surface of the bottom wall portion 910a, the frame 910 bends and the bottom The wall portion 910a is dented and the side wall portion 910b is deformed so as to bend (cross-sectional shape 911). The bottom wall portion 910a is on the inside of the bend. When the bending further progresses, the bottom wall portion 910a and the side wall portion 910b are further deformed in the out-of-plane direction. As a result, the frame 910 buckles. The cross-sectional shape 912 of the buckled frame 910 deviates significantly from the original cross-sectional shape. When buckling occurs in the frame 900 (910) as shown in FIGS. 129 and 130, the cross section is flattened. Such deformation is called cross-section collapse.
[0041]
　The bending rigidity of the structural material depends on the plate thickness of the structural material. If the plate thickness of the frame becomes thinner than the conventional one, the surface forming the frame is likely to be out-of-plane deformed. As a result, the bending rigidity of the frame is reduced. That is, the bending deformation of the frame is likely to occur as shown in FIGS. 129 and 130. When the frame is deformed in cross section, the height (thickness) of the frame gradually decreases, so that the bending rigidity gradually decreases. When the bending deformation progresses and buckling occurs, the bending rigidity sharply decreases. As a result of buckling, the load bearing capacity of the frame is significantly lower than the designed value. Therefore, the collision safety performance that the frame has conventionally decreases. That is, if the weight of the vehicle body is simply reduced by thinning the frame using a high-strength steel plate, the expected collision safety performance may not be ensured due to the cross-sectional deformation or buckling of the frame.
[0042]
　When the filling member is filled in the internal space of the frame, the cross-sectional deformation of the frame can be suppressed. However, when the filling member is filled, the amount of energy absorbed when a load is input is increased, but the weight of the frame is increased. Therefore, the present inventors provide a bending inducing portion that induces bending deformation when a load is input, and arrange a filling member in the bending inducing portion to improve the energy absorption amount when a load is input with high mass efficiency. We have come up with a hollow member that can be used. When the filling member is arranged in the frame, the bending rigidity is enhanced because the thickness of the place where the filling member is arranged is increased by the filling member. Since the bend inducing portion preferentially undergoes out-of-plane deformation, arranging the filling member in the bend inducing portion is an effective arrangement of the filling member. According to the present invention, the filling member arranged in the bending inducing portion increases the rigidity of the frame until the frame is deformed out-of-plane and buckles, so that the frame vigorously absorbs energy. Further, the amount of the filling member that leads to an increase in weight can be suppressed. The hollow member according to the embodiment of the present invention will be described below.
[0043]
　Hereinafter, a case where the hollow member according to the embodiment of the present invention is applied as a vehicle structural member will be described as an example. In this case, the load is, for example, a collision load. The energy absorption amount at the time of load input is the amount of collision energy absorbed by the frame when a collision load is input. Improving the amount of collision energy absorbed means improving collision safety performance.
[0044]
　<<2. First Embodiment>>
　The first embodiment is a mode in which a resin material is arranged in the bending inducing portion so as to be in close contact with the second metal plate.
[0045]
　<2.1. Structure of Frame>
　FIG. 2 is a perspective view showing a schematic structure of an example of the frame 1 according to the first embodiment of the present invention. The frame 1 in this specification is an example of a hollow member. The hollow member is used, for example, as a front side member and a rear side member of an automobile. The front side member includes a front side member rear that constitutes a rear end portion and a front side member front that constitutes a front side portion of the rear end portion. The rear side member includes a rear side member rear that constitutes a rear end portion, and a rear side member front that constitutes a portion on the front side of the rear end portion. Moreover, the hollow member is also used for a pillar of an automobile. The pillars include, for example, a front pillar (A pillar), a center pillar (B pillar), a rear pillar (C pillar, D pillar), and a front pillar lower (A pillar lower). The hollow member can also be used for floor reinforcements, floor cross members, bumper reinforcements, side sills, roof side rails, roof center reinforcements, crash boxes, tunnels and the like. The hollow member can be applied not only to an automobile but also to other vehicles and self-propelled machines. Other vehicles and self-propelled machines include, for example, large vehicles such as two-wheeled vehicles, buses or towing vehicles, trailers, railway vehicles, construction machinery, mining machinery, agricultural machinery, general machinery, aircraft and ships, etc. ..
[0046]
　The frame 1 according to this embodiment includes a first structural member 2, a second structural member 3, a reinforcement 4, and a filling member 5. The hollow member 10 according to the present embodiment is formed by the first structural member 2 and the second structural member 3. FIG. 3 is a cross-sectional view showing a cross section orthogonal to the Y-axis direction of an example of the hollow member 10 according to this embodiment. Hereinafter, the configuration of the frame 1 according to the present embodiment will be described with reference to FIGS. 2 and 3.
[0047]
　The 1st structural member 2 which concerns on this embodiment is an example of the structural member which forms the elongate hollow member 10, and has a hat-shaped cross-sectional shape. As shown in FIGS. 2 and 3, the first structural member 2 includes a bottom wall portion 2a extending in the longitudinal direction (Y-axis direction), side wall portions 2b and 2b, flange portions 2c and 2c, and ridge line portions 2d and 2d. 2e, 2e.
[0048]
　The side wall portion 2b is provided upright from both ends in the Z-axis direction (width direction) of the bottom wall portion 2a. The angle formed by the side wall portion 2b and the bottom wall portion 2a is not limited to being substantially vertical, but is appropriately set according to the design of the member. Further, the ridge line portion 2d is a portion that becomes a boundary between the bottom wall portion 2a and the side wall portion 2b.
[0049]
　The flange portion 2c is provided upright outward from the end portion of the side wall portion 2b opposite to the bottom wall portion 2a along the Z-axis direction. The angle formed by the flange portion 2c and the side wall portion 2b may be appropriately determined according to the design of the member. In addition, the ridge line portion 2e is a boundary portion between the side wall portion 2b and the flange portion 2c.
[0050]
　The second structural member 3 according to the present embodiment is an example of a structural member that forms the hollow member 10 together with the first structural member 2. The second structural member 3 is a plate-shaped member. As shown in FIG. 3, the second structural member 3 has a top wall portion 3a and joint portions 3c and 3c.
[0051]
　The top wall portion 3a is a portion facing the bottom wall portion 2a of the first structural member 2. The joint portion 3c is a portion that is in contact with the flange portion 2c of the first structural member 2 and is joined to the flange portion 2c. That is, the top wall portion 3a is a portion corresponding to a region existing between the respective connecting portions of the second structural member 3 with the pair of ridge line portions 2e. The joint portion 3c is a portion that comes into contact with a region of the flange portion 2c sandwiched between the ridgeline portion 2e and the end portion of the flange portion 2c in the second structural member 3.
[0052]
　The hollow member 10 according to the present embodiment is formed by the first structural member 2 and the second structural member 3 by joining the flange portion 2c and the joining portion 3c. At this time, as shown in FIG. 3, the hollow member 10 has a closed cross section. This closed cross section is formed by the bottom wall portion 2a, the pair of side wall portions 2b and 2b, and the top wall portion 3a. The method of joining the flange portion 2c and the joining portion 3c is not particularly limited. For example, the joining method may be welding such as laser welding, arc welding, or spot welding, mechanical joining such as rivet or bolt fastening, or adhesive bonding or brazing. In this embodiment, the flange portion 2c and the joint portion 3c are joined by spot welding.
[0053]
　The closed cross section of the hollow member 10 is substantially polygonal. Here, the substantially polygonal shape means a closed plane figure that can be approximately represented by a plurality of line segments. For example, the closed cross section shown in FIG. 3 is a substantially quadrangular shape composed of four line segments (corresponding to the bottom wall portion 2a, side wall portion 2b, and top wall portion 3a) and four vertices (corresponding to ridge line portions 2d and 2e). is there. The substantially quadrangle includes a rectangle and a trapezoid.
[0054]
　Further, even when the closed cross-section of the hollow member 10 is a substantially polygonal shape other than a substantially quadrangular shape, in the present specification, the hollow member 10 has a bottom wall portion 2a and a pair of side wall portions 2b and 2b. Also, it will be described as being formed by the top wall portion 3a. An example of the shape of the closed cross section of the hollow member 10 will be described later.
[0055]
　The hollow member 10 may have a closed cross-section structure as described above, or may have an open cross-section structure such as a U shape. The shape of the cross section of the hollow member 10 orthogonal to the longitudinal direction is not particularly limited. For example, the cross-sectional shape of the hollow member 10 may be a rectangular cross section or a circular cross section.
[0056]
　The hollow member according to the present embodiment is an example of a metal member. The first structural member 2 and the second structural member 3 according to the present embodiment are formed of, for example, a metal plate such as a steel plate. The 1st structural member 2 and the 2nd structural member 3 which concern on this embodiment are examples of a 1st metal plate. From the viewpoint of weight reduction, the plate thickness of both structural members is preferably 2.3 mm or less in a frame structure that is often used in large vehicles such as buses, and is preferably 2.3 mm or less in a monocoque structure vehicle that is often used in vehicles of normal size. The thickness is preferably 1.8 mm or less, and for small vehicles such as motorcycles, the plate thickness is preferably 1.4 mm or less. Further, from the viewpoint of the present invention, when the bending inducing portion is provided in the metal plate having the relatively thin plate thickness, the out-of-plane deformation can be generated in the bending inducing portion in preference to other portions. Further, the strength of the first structural member 2 and the second structural member 3 according to the present embodiment is not particularly limited. However, the tensile strength of both structural members is preferably 780 MPa or more. Further, the tensile strength of both structural members is more preferably 980 MPa or more. This is because the metal member forming the hollow member is arranged on the surface to which the highest tensile stress is applied in the bending inducing portion. Members with low tensile strength also have low yield strength. When the yield strength is low, the hollow member easily plastically deforms when out-of-plane deformation occurs. As the plastic deformation progresses, the hollow member buckles.
[0057]
　Returning to FIG. 2, the components of the frame 1 will be described. The reinforcement 4 is arranged inside the hollow member 10, as shown in FIG. As shown in FIG. 2, the reinforcement 4 has a main surface portion 4a and a joint portion 4b. The reinforcement 4 is arranged so that the main surface portion 4a according to the present embodiment faces the bottom wall portion 2a and the top wall portion 3a.
[0058]
　Further, the joint portion 4b according to this embodiment is joined to the side wall portion 2b. Thus, the main surface portion 4a is provided so as to bridge the pair of side wall portions 2b, 2b. Then, when the impact is applied to the hollow member 10, the reinforcement 4 suppresses the deformation of the pair of side wall portions 2b, 2b, so that the cross-sectional deformation of the hollow member 10 can be suppressed. The method of joining the joining portion 4b and the side wall portion 2b is not particularly limited. For example, the joining method is not particularly limited as in the joining of the flange portion 2c and the joining portion 3c. In this embodiment, the joint portion 4b and the side wall portion 2b are joined by spot welding. Further, the reinforcement 4 also has a function as a threshold plate for partitioning a region where the filling member 5 is arranged.
[0059]
　The reinforcement 4 according to this embodiment is an example of a second metal plate. The reinforcement 4 according to the present embodiment is formed of, for example, a metal plate such as a steel plate. Further, the material forming the reinforcement 4 may be plastic, carbon fiber, an alloy plate or a composite material.
[0060]
　The specific arrangement position inside the hollow member 10 of the reinforcement 4 according to this embodiment will be described later.
[0061]
　The filling member 5 according to the present embodiment is a resin material. The filling member 5 is made of urethane resin, epoxy resin, or any other resin. The filling member 5 can be formed with a Young's modulus of up to about 300 MPa if it is a urethane resin and up to about 3000 MPa if it is an epoxy resin. The filling member 5 may be a hard foam filling member made of foam resin, for example. The foamed resin is filled inside the hollow member 10 and then cured by a chemical change to form the filling member 5. The Young's modulus of the filling member 5 is preferably 20 MPa or more. The Young's modulus of the filling member 5 can be changed according to the density of the resin forming the filling member 5. However, it is preferable that the Young's modulus of the filling member 5 is 300 to 400 MPa at the maximum because the higher the resin density is, the more difficult it is to mold the resin.
[0062]
　In addition, a specific arrangement position of the filling member 5 according to the present embodiment inside the hollow member 10 will be described later.
[0063]
　Further, the hollow member 10 according to the present embodiment is provided with bent portions 6A and 6B. The bent portion 6 is a portion where the hollow member 10 bends. That is, the bent portion 6 is a portion in which the radius of curvature in the longitudinal direction of the locus of the center of gravity defined along the center of gravity of the cross section of the hollow member 10 is 260 mm or less. FIG. 4 is a schematic diagram in which the locus of the center of gravity of the cross section of the hollow member 10 is visualized. As shown in FIG. 4, the locus C1 of the center of gravity of the cross section of the hollow member 10 is bent at the bent portions 6A and 6B.
[0064]
　The bending portion 6 is an example of a bending inducing portion, which will be described later in detail. The hollow member 10 including such a bent portion 6 is obtained, for example, by press-molding a shape in which a part of the first structural member 2 and the second structural member 3 is bent and assembling these structural members. .. Such a bent portion 6 is appropriately provided according to the structure of the vehicle to which the frame 1 is applied. That is, the frame 1 has a portion where bending deformation is allowed depending on the structure of the vehicle, and the bending portion 6 is provided at that portion. The place where bending deformation is allowed is exemplified by a place where the bent frame 1 does not come into contact with an occupant and important parts even if the frame 1 is bent and deformed at the place. The number of bent portions 6 provided in the hollow member 10 is not particularly limited, and is appropriately determined according to the vehicle structure as described above.
[0065]
　The bending inducing portion is provided in a part of the hollow member 10 in the longitudinal direction. When the bending induction portion is formed in the hollow member 10, the bending deformation occurs in the bending induction portion due to the collision in the longitudinal direction. For example, as shown in FIG. 4, if at least one of the radii of curvature RA and RB of the bent portions 6A and 6B is 260 mm or less, the hollow member 10 satisfies the above-mentioned radius of curvature when a collision load is input. Bending deformation occurs in at least one of the bent portions 6A and 6B. The energy required for this bending deformation is supplied from the energy generated by collision. That is, the collision energy can be absorbed by the bending deformation of the hollow member 10. By providing this bending inducing portion in the hollow member 10, it is possible to set the bending start point of the hollow member 10 caused by the collision. Therefore, since it is possible to avoid an impact on the cabin due to an unexpected bending of the hollow member 10, it is possible to maintain the safety of the cabin.
[0066]
　Further, the reinforcement 4 is provided inside the bending inducing portion of the hollow member 10 so as to support the hollow member 10 from the inside. Thereby, the cross-sectional deformation of the hollow member 10 at the time of collision can be suppressed, and the load resistance against collision can be improved. Therefore, collision safety performance can be improved.
[0067]
　The length of the bottom wall portion 2a in the Z-axis direction is preferably longer than the length of the side wall portion 2b in the X-axis direction. As a result, the geometrical moment of inertia of the hollow member 10 in the Z-axis direction becomes larger than the geometrical moment of inertia in the X-axis direction. Therefore, when the collision load is input to the hollow member 10, the bottom wall portion 2a and the top wall portion 3a are easily bent.
[0068]
　Hereinafter, an example of the arrangement of the reinforcement 4 and the filling member 5 inside the frame 1 according to the present embodiment will be described. The bending inducing portion described above is not limited to the bending portion 6. A specific example of the bending inducing portion will be described later.
[0069]
　(Arrangement of Filling Member and Reinforcement)
　FIG. 5 is a sectional view of an example of the frame 1 according to the present embodiment in a section orthogonal to the Z-axis direction. The sectional view shown in FIG. 5 corresponds to the sectional view of the hollow member 10 taken along the line II shown in FIG. As shown in FIG. 5, the hollow member 10 has two bent portions 6A and 6B. The bent portion 6A is bent in the direction of the bottom wall portion 2a so that the bottom wall portion 2a is bent inside. The bent portion 6B is bent in the direction of the top wall portion 3a so that the top wall portion 3a is on the inside of the bend. The bent portions 6A and 6B correspond to the bend inducing portion of the frame 1.
[0070]
　The filling members 5A and 5B according to the present embodiment are arranged in close contact with the main surface portion 4a of the reinforcement 4. In the example shown in FIG. 5, the filling member 5A is provided in a portion facing the bottom wall portion 2a. Further, the filling member 5B is provided in a portion facing the ceiling wall portion 3a.
[0071]
　The definitions of the symbols of the respective dimensions attached to the frame 1 shown in FIG. 5 are as follows. The length L FL of the hollow member 10 according to the present embodiment is, for example, about several hundred mm.
　　L FL : Length of the hollow member 10 in the Y-axis direction (longitudinal direction).
　　D FL1 : Cross-sectional dimension in the X-axis direction at the end of the hollow member 10 on the collision side.
　　D FL2 : Cross-sectional dimension in the X-axis direction at the other end of the hollow member 10.
　　L R : rain the longitudinal direction of the length of the reinforcement 4.
　　S FL : Offset length of the second structural member 3 before and after the bent portion 6 in the longitudinal direction.
　　L FMA , L FMB : Lengths of the filling members 5A and 5B in the Y-axis direction.
[0072]
　6 and 7 are cross-sectional views taken along the II-II cutting line and the III-III cutting line of the frame 1 shown in FIG. As shown in FIG. 6, the filling member 5A is arranged in close contact with the main surface portion 4a in the space 7A formed by the bottom wall portion 2a, the main surface portion 4a, and the pair of side wall portions 2b. As will be described later in detail, the filling member 5A may be arranged so as to be in close contact with at least the main surface portion 4a. For example, the filling member 5A does not necessarily have to be arranged on the space 7A side. More specifically, the filling member 5A may be arranged in close contact with the main surface portion 4a in a space opposite to the space 7A with respect to the reinforcement 4. Further, as shown in FIG. 7, in the bent portion 6B, the filling member 5B is in close contact with the main surface portion 4a in the space 7B formed by the top wall portion 3a, the main surface portion 4a, and the pair of side wall portions 2b. Are arranged. The filling member 5B does not necessarily have to be arranged in the space 7B, as in the example of the filling member 5A. More specifically, the filling member 5B may be arranged in close contact with the main surface portion 4a in a space opposite to the space 7B with respect to the reinforcement 4.
[0073]
　The operation and effect of the filling member 5A will be described with reference to FIG. First, the filling member 5A is arranged in close contact with the main surface portion 4a of the reinforcement 4. When the filling member 5A comes into close contact (preferably adhesion) with the main surface portion 4a, the resistance against the out-of-plane deformation of the main surface portion 4a increases. As a result, when a collision load on the frame 1 is input and the bending portion 6A is bent, out-of-plane deformation of the main surface portion 4a that can occur due to the compressive stress in the Z axis direction applied to the reinforcement 4 is generated. And the buckling of the reinforcement 4 can be suppressed. Therefore, since the reinforcement 4 can suppress the deformation of the side wall portion 2b due to the input of the collision load, the cross-sectional deformation of the closed cross section of the hollow member 10 is also suppressed. Therefore, the collision safety performance of the frame 1 can be exhibited more reliably.
[0074]
　Further, referring to FIG. 6, the filling member 5A is arranged in close contact with the inner surface of the bottom wall portion 2a of the bent portion 6. By arranging the filling member 5A in close contact (preferably bonding) at such a position, the resistance against the out-of-plane deformation of the bottom wall 2a in the bent portion 6A becomes high. Accordingly, when a collision load on the frame 1 is input and bending occurs in the bent portion 6A, it is possible to suppress the out-of-plane deformation of the bottom wall portion 2a at the position where the bending occurs. Therefore, the cross-sectional deformation of the closed cross section of the hollow member 10 is directly suppressed by the filling member 5A. Therefore, the collision safety performance of the frame 1 can be further enhanced.
[0075]
　Further, in the example shown in FIG. 6, the filling member 5A connects the main surface portion 4a and the bottom wall portion 2a. Here, the connection means that the filling member 5A is arranged in close contact with the main surface portion 4a and the bottom wall portion 2a. When the collision load on the frame 1 is input and the bending portion 6A is bent, the out-of-plane deformations of the main surface portion 4a and the bottom wall portion 2a occur in opposite directions. Here, by connecting the main surface portion 4a and the bottom wall portion 2a by the filling member 5A, it is possible to offset the forces that the filling member 5A receives due to the deformations of the main surface portion 4a and the bottom wall portion 2a. This makes it possible to reduce not only the out-of-plane deformation of the main surface portion 4a but also the force itself that causes the out-of-plane deformation. Therefore, the collision safety performance of the frame 1 can be further enhanced.
[0076]
　Further, in the example shown in FIG. 6, the filling member 5A is arranged in continuous contact with the reinforcement 4 and the side wall portion 2b. That is, the filling member 5A is arranged in close contact with the inside of the connection portion 4c that connects the main surface portion 4a and the side wall portion 2b. When the collision load on the frame 1 is input and the bending portion 6 is bent, a high stress is generated in the connecting portion 4c, and a plastic deformation is locally generated in the connecting portion 4c. By disposing the filling member 5A in close contact (preferably adhesion) with the connecting portion 4c, it is possible to suppress local plastic deformation that occurs in the connecting portion 4c. Thereby, the collision safety performance of the frame 1 can be improved more effectively.
[0077]
　Further, in the example shown in FIG. 6, the filling member 5A is arranged in close contact with the bottom wall portion 2a and the side wall portion 2b continuously. That is, the filling member 5A is arranged in close contact with the inside of the ridge 2d. Similar to the plastic deformation of the connecting portion 4c described above, when a collision load on the frame 1 is input and the bending portion 6A is bent, plastic deformation locally occurs at the ridge portion 2d. Therefore, by arranging the filling member 5A in close contact (preferably bonding) at such a position, it is possible to suppress local plastic deformation that occurs in the ridge line portion 2d. Thereby, the collision safety performance of the frame 1 can be improved more effectively.
[0078]
　In the example shown in FIG. 6, the filling member 5A is arranged in close contact with all the insides of the ridge portion 2d and the connecting portion 4c. Not limited to this, if the filling member 5A is arranged inside at least one of the ridge line portion 2d and the connection portion 4c, the collision safety performance is improved.
[0079]
　Here, the higher the Young's modulus of the filling member 5, the higher the effect of suppressing the plastic deformation described above by the filling member 5. However, in order to increase the Young's modulus of the filling member 5, it is necessary to mold the resin with high density. That is, when the Young's modulus of the filling member 5 is increased, the mass per unit volume of the filling member 5 increases. In the present embodiment, the place where the cross-section deformation occurs, that is, the place where the cross-section deformation should be suppressed can be limited to the bent portion 6 or its periphery. Therefore, the place where the filling member 5 should be placed can be limited in anticipation of the place where the cross-section is deformed. That is, in this embodiment, it is possible to reduce the weight increase due to the increase in the Young's modulus of the filling member 5. As described above, in this embodiment, it is possible to improve the collision safety performance with high mass efficiency.
[0080]
　The action and effect brought about by the arrangement of the filling member 5A have been described above. Note that the above-described actions and effects are similarly exhibited in the filling member 5B filled between the top wall portion 3a and the main surface portion 4a as shown in FIG.
[0081]
　As described above, in the frame 1 according to the present embodiment, the reinforcement 4 is provided inside the bent portion 6 that is the bending inducing portion, and the filling member 5 is arranged in close contact with the reinforcement 4. With such a configuration, it is possible to suppress the out-of-plane deformation of the reinforcement 4 when the collision load is input to the frame 1 and suppress the buckling of the reinforcement 4. Thereby, the cross-sectional shape of the hollow member 10 is maintained by the reinforcement 4, so that the cross-sectional deformation of the hollow member 10 can be suppressed. Therefore, even when the plate thicknesses of the hollow member 10 and the reinforcement 4 are reduced in order to reduce the weight of the vehicle body, the collision safety performance of the frame 1 can be maintained.
[0082]
　The reinforcement 4 shown in FIG. 5 is formed of one member and is provided so as to face each of the bottom wall portion 2a and the top wall portion 3a of the bent portion 6, but the present invention is not limited to this example. Not limited to. For example, a plurality of reinforcements 4 may be provided so as to face the bottom wall portion 2a or the top wall portion 3a in the bending inducing portion such as the bending portion 6. Further, the reinforcement 4 may be provided entirely along the longitudinal direction of the hollow member 10. That is, as long as the reinforcement 4 is provided inside the bending inducing portion, the position and the length of the reinforcement 4 in the longitudinal direction of the hollow member 10 are not particularly limited.
[0083]
　<2.2. Arrangement Example of Filling Member> The arrangement of the
　filling members 5A and 5B according to the present embodiment has been described above. The arrangement of the filling member 5 is not limited to the examples shown in FIGS. 6 and 7. Hereinafter, another arrangement example of the filling member 5 will be described.
[0084]
　(First Arrangement Example) In
　the first arrangement example, out-of-plane deformation of the reinforcement 4 is suppressed by the filling member 510 arranged in close contact with the reinforcement 4. If the out-of-plane deformation of the reinforcement 4 can be suppressed, the out-of-plane deformation of the wall portion (for example, the side wall portion 2b) to which the reinforcement 4 is connected can be suppressed. As a result, the cross-sectional deformation of the hollow member 10 can be suppressed.
[0085]
　FIG. 8 is a cross-sectional view of the frame 1 for explaining the first arrangement example of the filling member according to the present embodiment. The sectional view shown in FIG. 8 corresponds to the section of the frame 1 taken along the line II-II of the frame 1 shown in FIG.
[0086]
　As shown in FIG. 8, the filling member 510 is disposed in close contact (preferably adhered) with the central portion of the surface of the main surface portion 4a facing the bottom wall portion 2a. With this arrangement, as described above, the resistance to the out-of-plane deformation of the main surface portion 4a can be increased. In other words, by disposing the filling member 510 in close contact with only a part of the main surface portion 4a, it is possible to suppress the out-of-plane deformation of the reinforcement 4 and suppress the buckling of the reinforcement 4. That is, the effect of suppressing the cross-sectional deformation of the hollow member 10 can be sufficiently obtained. Therefore, as long as it is possible to ensure the required collision safety performance, as shown in FIG. 8, the filling member 510 may be arranged only on a part of the main surface portion 4a. As a result, the filling amount of the filling member 510 is reduced, so that the cost of the filling member 510 and the weight of the frame 1 can be kept low.
[0087]
　The arrangement position of the filling member 510 is not limited to the side facing the bottom wall portion 2a of the main surface portion 4a, as described above. For example, the filling member 510 shown in FIG. 8 may be provided on the side of the main surface portion 4a that faces the ceiling wall portion 3a. That is, as long as the filling member 510 is placed in close contact with the reinforcement 4, the placement surface of the filling member 510 on the main surface portion 4a is not particularly limited.
[0088]
　(Second Arrangement Example) In
　the second arrangement example, the filling member 511 connects the reinforcement 4 and the wall portion (for example, the bottom wall portion 2a) facing the reinforcement 4 to each other. Since the reinforcement 4 and the wall portion facing the reinforcement 4 constrain each other through the filling member 511, the out-of-plane deformation of the reinforcement 4 and the wall portion facing the reinforcement 4 can be suppressed. Furthermore, since the out-of-plane deformation of the reinforcement 4 can be suppressed, the out-of-plane deformation of the wall portion to which the reinforcement 4 is connected can also be suppressed. As a result, the cross-sectional deformation of the hollow member 10 can be suppressed.
[0089]
　FIG. 9 is a cross-sectional view of the frame 1 for explaining the second arrangement example of the filling member according to the present embodiment. The cross-sectional view shown in FIG. 9 corresponds to the cross section of the frame 1 taken along the line II-II of the frame 1 shown in FIG.
[0090]
　As shown in FIG. 9, the filling member 511 is arranged in close contact (preferably adhesion) with each portion so as to connect the central portion of the main surface portion 4a and the central portion of the bottom wall portion 2a. With this arrangement, as described above, the out-of-plane deformation of the reinforcement 4 and the bottom wall portion 2a can be suppressed more effectively. In this case, as shown in FIG. 9, even if the filling member 511 connects only a part of the main surface portion 4a and a part of the bottom wall portion 2a, a sufficient effect of suppressing the cross-sectional deformation of the hollow member 10 can be obtained. be able to. Therefore, if it is possible to secure the required collision safety performance, as shown in FIG. 9, the filling member 511 is arranged so as to connect only a part of the main surface portion 4a and the bottom wall portion 2a. Good. As a result, the filling amount of the filling member 511 is reduced, so that the cost of the filling member 511 and the weight of the frame 1 can be kept low.
[0091]
　Further, the arrangement position of the filling member 511 is not limited to between the main surface portion 4a and the bottom wall portion 2a as described above. For example, the filling member 511 shown in FIG. 9 may be arranged between the main surface portion 4a and the top wall portion 3a, and may connect the main surface portion 4a and the top wall portion 3a. When the main surface portion 4a of the reinforcement 4 is provided so as to face the side wall portion 2b, the filling member 511 may connect any of the side wall portions 2b and the main surface portion 4a. That is, as long as the filling member 511 is disposed in close contact with the reinforcement 4, the portion to be connected by the filling member 511 is not particularly limited.
[0092]
　The arrangement position in the Z-axis direction of the main surface portion 4a (and the bottom wall portion 2a) of the filling member 5 shown in the first arrangement example and the second arrangement example is not particularly limited. However, it is preferable that the filling member 5 is disposed in close contact with the central portion of the main surface portion 4a where the bending amount of the main surface portion 4a that receives the bending moment is the largest. Further, the width of the filling member 5 on the main surface portion 4a is preferably 20% or more of the width of the main surface portion. It is more desirable if it is 30% or more. Accordingly, it is possible to prevent the collision energy from being applied to the reinforcement 4 due to the elastic deformation of the reinforcement 4. This is because when collision energy is applied to the reinforcement 4, energy absorption due to bending at the time of collision is hindered.
[0093]
　Further, as shown in FIGS. 8 and 9, the filling member 5 does not necessarily have to be arranged so as to densely fill the space 7A. If the filling member 5 is disposed in close contact with at least the main surface portion 4a of the reinforcement 4, the effect of suppressing the cross-sectional deformation of the hollow member due to the reinforcement 4 is exerted. The filling amount and the arrangement position of the filling member 5 in the space 7A can be appropriately adjusted based on the required collision safety performance of the frame 1, the weight of the frame 1, the filling cost of the filling member 5, and the like. Moreover, the filling member 5 does not necessarily have to be provided in the space 7A. That is, the filling member 5 may be arranged in the space of the hollow member 10 on the side different from the space 7A.
[0094]
　(Third Arrangement Example) In
　the third arrangement example, the filling member 512 connects the reinforcement 4 and the wall portion to which the reinforcement 4 is connected. Since the reinforcement 4 and the wall portion connecting the reinforcement 4 are constrained by the filling member 512, the angle formed by the reinforcement 4 and the wall portion connecting the reinforcement 4 is fixed. As a result, the cross-sectional deformation of the hollow member 10 can be suppressed.
[0095]
　FIG. 10 is a cross-sectional view of the frame 1 for explaining a third arrangement example of the filling member according to this embodiment. The cross-sectional view shown in FIG. 10 corresponds to the cross section of the frame 1 taken along the line II-II of the frame 1 shown in FIG.
[0096]
　As shown in FIG. 10, the filling member 512 includes a main surface portion 4a, a bottom wall portion 2a, and a pair of side wall portions 2b. It is arranged so as to adhere (preferably adhere) to the side wall portion 2b. Further, the filling member 512 has a cavity 512a inside. As a result, the filling amount of the filling member 512 can be suppressed while enhancing the effect of suppressing the deformation of the reinforcement 4 and the hollow member 10. It should be noted that the filling member 512 shown in FIG. 10 is not particularly limited in terms of the presence or absence of close contact with other wall portions and the filling amount as long as it is arranged in close contact with the reinforcement 4.
[0097]
　<<3. Second Embodiment>>
　The second embodiment is a mode in which a resin material is arranged in the bending inducing portion in close contact with the inner surface of at least either the bottom wall or the top wall of the metal member.
[0098]
　<3.1. Configuration of Frame>
　(Components of Frame)
　FIG. 11 is a perspective view showing a schematic configuration of an example of the frame 1 according to the second embodiment of the present invention. As shown in FIG. 11, the frame 1 according to this embodiment includes a first structural member 2, a second structural member 3, and a filling member 5 (5A, 5B). The hollow member 10 according to the present embodiment is formed by the first structural member 2 and the second structural member 3. The structure of the frame 1 shown in FIG. 11 is the same as that described in the first embodiment with reference to FIGS. 2 to 4 except that the reinforcement 4 is not provided and the filling member 5 is arranged. Hereinafter, an example of the arrangement of the filling member 5 inside the frame 1 according to the present embodiment will be described.
[0099]
　(Arrangement of Filling Member)
　FIG. 12 is a cross-sectional view showing a cross section orthogonal to the Z-axis direction of an example of the frame 1 according to the present embodiment. The cross-sectional view shown in FIG. 12 corresponds to the cross-sectional view of the hollow member 10 taken along the line IV-IV shown in FIG. As shown in FIG. 12, the hollow member 10 is provided with a bent portion 6A that bends in a direction in which the bottom wall portion 2a is bent inward, and a bent portion 6B that is bent in a direction in which the ceiling wall portion 3a is bent inward. ing. As shown in FIGS. 11 and 12, the filling members 5A and 5B according to the present embodiment are in close contact with the inner surface of the portion of the bottom wall 2a or the top wall 3a where the bent portions 6A and 6B are provided. Will be placed. These bent portions 6 correspond to bend inducing portions in the frame 1.
[0100]
　The definitions of the symbols of the respective dimensions attached to the frame 1 shown in FIG. 12 are as follows.
　　L FL : Length of the hollow member 10 in the Y-axis direction (longitudinal direction).
　　D FL1 : Cross-sectional dimension in the X-axis direction at the end of the hollow member 10 on the collision side.
　　D FL2 : Cross-sectional dimension in the X-axis direction at the other end of the hollow member 10.
　　S FL : Offset length of the second structural member 3 before and after the bent portion 6 in the longitudinal direction.
　　L FMA , L FMB : Lengths of the filling members 5A and 5B in the Y-axis direction.
[0101]
　FIG. 13 is a sectional view taken along the line VV of the frame 1 shown in FIG. FIG. 14 is a cross-sectional view taken along the line VI-VI of the frame 1 shown in FIG. As shown in FIG. 13, the filling member 5A is arranged in close contact (preferably adhesion) with the inner surface of the bottom wall portion 2a. The inner surface of the bottom wall portion 2a corresponds to the bent inner portion of the bent portion 6A. In particular, as shown in FIG. 13, the filling member 5A is arranged in close contact with the inner surface of the central portion of the bottom wall portion 2a. Further, as shown in FIG. 14, the filling member 5B is arranged in close contact with the inner surface of the top wall portion 3a. The inner surface of the top wall portion 3a corresponds to the bent inner portion of the bent portion 6B.
[0102]
　With such an arrangement, when a force in the out-of-plane direction due to bending compression of the frame 1 is applied to the bottom wall portion 2a, the deformation of the central portion of the bottom wall portion 2a is restrained by the filling member 5A. Thereby, the out-of-plane deformation of the bottom wall portion 2a can be suppressed. That is, when the collision load is input to the frame 1, it is possible to suppress the out-of-plane deformation of the hollow member 10 in the portion where the filling member 5A is arranged. Thereby, the cross-sectional deformation of the frame 1 is suppressed, so that the load bearing performance of the frame 1 can be improved. Therefore, it is possible to maintain high collision safety performance while reducing the weight of the frame 1.
[0103]
　The thickness a of the filling member 5A in the X-axis direction is not particularly limited, and the thickness a is appropriately set according to the load bearing performance and the weight required for the frame 1. In order to control the wall thickness a of the filling member 5A, for example, a plate material such as a reinforcement (not shown) may be provided inside the hollow member 10. Further, the distances b 1 and b 2 from the side wall portion that determine the arrangement position of the filling member 5A are not particularly limited. However, by disposing the filling member 5A in close contact with the inner surface of the central portion of the bottom wall portion 2a, the out-of-plane deformation of the bottom wall portion 2a can be efficiently suppressed. Further, the width of the filling member 5A on the bottom wall portion 2a is preferably 20% or more of the width of the bottom wall portion 2a. It is more desirable if it is 30% or more. Further, it is preferable that the distances b 1 and b 2 have the same value. In addition, the magnitudes of the distances b 1 and b 2 are determined according to the wall thickness in the X-axis direction of the filling member 5A that is appropriately set according to the load bearing performance and the weight required for the frame 1.
[0104]
　In FIG. 14, the filling member 5B is arranged on the top wall portion 3a. The filling member 5B is the same as that shown in FIG. 13 except that it is arranged on the top wall portion 3a. However, the width of the filling member 5B on the top wall portion 3a is preferably 20% or more of the width of the top wall portion 3a in the closed cross section. It is more desirable if it is 30% or more.
[0105]
　In the present invention, “close contact” means that they are arranged in contact with each other without a gap. Of the close contact, the adhesion for restraining each other is most preferable. Even when they are not constrained to each other, the effect of the filling member 5 suppressing the out-of-plane deformation of at least one of the walls forming the hollow member 10 is exhibited. For example, it is assumed that the cross-sectional shape change shown in FIGS. 129 and 130 occurs in the frame 1 according to the present embodiment. When the filling member 5 is adhered to the inner surface of at least one of the bottom wall portion 2a and the top wall portion 3a, when the bottom wall portion 2a or the top wall portion 3a is deformed out of the plane, the filling member 5 is also out of the inner surface. Follow the deformation. Therefore, the effect of suppressing the out-of-plane deformation of the bottom wall portion 2a or the top wall portion 3a by the filling member 5 is remarkably exhibited. Further, when the filling member 5 and the inner surface of at least one of the bottom wall portion 2a and the top wall portion 3a are arranged in close contact with each other without being restrained, when the bottom wall portion 2a or the top wall portion 3a is deformed out of plane. In some cases, the filling member 5 and the inner surface are partially separated from each other. However, even when the inner surface is out-of-plane deformed, it remains in contact with at least a part of the filling member 5. Therefore, even when the filling member 5 and the inner surface are in close contact with each other without being restrained, the effect of suppressing the out-of-plane deformation of the bottom wall portion 2a or the top wall portion 3a by the filling member 5 is sufficiently exerted. ..
[0106]
　Here, the higher the Young's modulus of the filling member 5, the higher the effect of suppressing the plastic deformation described above by the filling member 5. However, in order to increase the Young's modulus of the filling member 5, it is necessary to mold the resin with high density. That is, when the Young's modulus of the filling member 5 is increased, the mass per unit volume of the filling member 5 increases. In the present embodiment, the place where the cross-section deformation occurs, that is, the place where the cross-section deformation should be suppressed can be limited to the bent portion 6 or its periphery. Therefore, the place where the filling member 5 should be placed can be limited in anticipation of the place where the cross-section is deformed. That is, in this embodiment, it is possible to reduce the weight increase due to the increase in the Young's modulus of the filling member 5. As described above, in this embodiment, it is possible to improve the collision safety performance with high mass efficiency.
[0107]
　The arrangement of the filling member 5A, and the operation and effect of the arrangement have been described above. Note that the above-described actions and effects are similarly exhibited by the filling member 5B arranged inside the bent portion 6B as shown in FIG.
[0108]
　As described above, in the frame 1 according to the present embodiment, the filling member 5A is disposed in close contact with the inner surface of the bottom wall portion 2a included inside the bending portion 6 that is the bending inducing portion, and the filling member 5A is disposed inside the bending portion 6B. The filling member 5B is arranged in close contact with the inner surface of the included top wall portion 3a. With this configuration, when a collision load is input to the frame 1, it is possible to suppress the out-of-plane deformation of the bottom wall portion 2a and the top wall portion 3a caused by the bending compression of the frame 1. As a result, it is possible to prevent the cross-section of the frame 1 from collapsing due to a collision. Therefore, even when the plate thickness of the hollow member 10 is reduced in order to reduce the weight of the vehicle body, the weight of the frame 1 is significantly increased by disposing the filling member 5 having a low mass density in the above-mentioned portion. Without doing so, the load bearing performance of the frame 1 can be maintained high. That is, for example, it is possible to prevent easy bending of the frame 1 in the bending inducing portion.
[0109]
　<3.2. Arrangement Example of Filling Member> The arrangement of the
　filling members 5A and 5B according to the present embodiment has been described above. The arrangement of the filling member 5 is not limited to the examples shown in FIGS. 11 to 14. Hereinafter, another arrangement example of the filling member 5 will be described.
[0110]
　In the following first to fourth arrangement examples, the filling member connects the end portion of the side wall portion 2b and the bottom wall portion 2a or the top wall portion 3a. That is, the filling member is arranged adjacent to the ridge line portion 2d or the ridge line portion 2e. The filling member suppresses a change in the angle formed between the side wall portion 2b and the bottom wall portion 2a or the top wall portion 3a. That is, the filling member suppresses the deformation of the ridge portion 2d or the ridge portion 2e. As a result, the cross-sectional deformation of the hollow member 10 can be suppressed.
[0111]
　(First Arrangement Example)
　FIG. 15 is a sectional view of the frame 1 for explaining the first arrangement example of the filling member according to the present embodiment. The cross-sectional view shown in FIG. 15 corresponds to the cross section of the frame 1 taken along the line VV of the frame 1 shown in FIG.
[0112]
　As shown in FIG. 15, the filling member 520 according to the present arrangement example is arranged in close contact (preferably adhesion) with the side wall portion 2b and the bottom wall portion 2a continuously. That is, the filling member 520 is arranged in close contact with the inside of the ridge 2d. When the collision load on the frame 1 is input and the bending portion 6A is bent, plastic deformation locally occurs at the ridge portion 2d. This plastic deformation promotes the falling of the side wall portion 2b in the out-of-plane direction. Therefore, by placing the filling member 520 in close contact with such a position, it is possible to suppress local plastic deformation that occurs in the ridge line portion 2d. As a result, it is possible to prevent the side wall portion 2b from falling out of the plane. Therefore, the cross-sectional deformation of the frame 1 can be suppressed more effectively.
[0113]
　The thickness a of the filling member 520 is appropriately set according to the load bearing performance and weight required for the frame 1.
[0114]
　The arrangement of the filling members shown in FIG. 15 can be similarly applied to the cross section of the frame 1 taken along the line VI-VI of the frame 1 shown in FIG. In this case, the filling member 520 is arranged in close contact with the inner surface of the top wall portion 3a and the inside of the ridge line portion 2e.
[0115]
　(Second Arrangement Example)
　FIG. 16 is a sectional view of the frame 1 for explaining a second arrangement example of the filling member according to the present embodiment. The cross-sectional view shown in FIG. 16 corresponds to the cross section of the frame 1 taken along the line VV of the frame 1 shown in FIG.
[0116]
　The filling members 521a and 521b according to this arrangement example are arranged so as to locally adhere (preferably adhere) to the inside of each of the ridge portions 2d. With such an arrangement, it is possible to suppress local plastic deformation that occurs in the ridge portion 2d. Thereby, the inclination of the side wall portion 2b in the out-of-plane direction can be reduced. Therefore, the cross-sectional deformation of the frame 1 can be suppressed. Further, in the example shown in FIG. 16, since the filling members 521a and 521b are locally and closely attached to the inside of the ridge portion 2d, the cross-sectional deformation of the frame 1 can be prevented with almost no increase in the weight of the frame 1. Can be suppressed.
[0117]
　(Third Arrangement Example) Further
　, the filling member according to the present embodiment may be arranged so as to locally adhere (preferably adhere) to the inside of at least one of the ridge portions 2d. FIG. 17 is a cross-sectional view of the frame 1 for explaining a third arrangement example of the filling member according to this embodiment. The cross-sectional view shown in FIG. 17 corresponds to the cross section of the frame 1 taken along the line VV of the frame 1 shown in FIG.
[0118]
　As shown in FIG. 17, the filling member 521c according to the present arrangement example is arranged locally in close contact with one inside of the ridge line portion 2d. As a result, it is possible to suppress local plastic deformation that occurs in the ridge line portion 2d where the filling member 521c is arranged. Further, since the filling amount of the filling member can be reduced, it is possible to avoid increasing the weight of the frame 1.
[0119]
　According to the arrangement example of the filling members shown in FIGS. 16 and 17, not only the out-of-plane deformation of the bottom wall portion 2a but also the local plastic deformation of the ridge portion 2d can be suppressed. It should be noted that it is preferable to determine whether the filling member is provided inside one or both of the ridge portions 2d in accordance with the collision safety performance and the weight required for the frame 1. Further, the thicknesses a(a 1 , a 2 ) in the Z-axis direction and the thicknesses c(c 1 , c 2 ) in the X-axis direction of the filling members 521a, 521b, and 521c are set appropriately.
[0120]
　Further, the filling member may be separately and closely arranged on the inner surface of the central portion of the bottom wall portion 2a and the inner side of the ridge line portion 2d. If each of the filling members is arranged in close contact with the inner surface of the central portion of the bottom wall portion 2a and the inside of the ridge portion 2d, the effect of suppressing the cross-sectional deformation of the frame 1 can be sufficiently obtained.
[0121]
　The arrangement of the filling members shown in FIGS. 16 and 17 can be similarly applied to the cross section of the frame 1 taken along the line VI-VI of the frame 1 shown in FIG. In this case, the filling members 521a to 521c are arranged in close contact with the inside of the ridge 2e.
[0122]
　Further, the filling member may be arranged not only on the inner side of the ridge line portion 2d but also on the inner surface of the side wall portion 2b in close contact. 18 and 19 are cross-sectional views of the frame 1 for explaining respective modifications of the second arrangement example and the third arrangement example of the filling member according to the present embodiment. As shown in FIGS. 18 and 19, the filling members 522a, 522b and 522c may be arranged not only on the inner side of the ridge 2d but also on the inner surface of the side wall 2b. Furthermore, the filling members 522a, 522b, and 522c may be arranged in close contact with the inside of the ridge 2e. As a result, the load bearing performance of the frame 1 can be made equal to or higher than that of the arrangement examples shown in FIGS. 16 and 17. The wall thicknesses a(a 1 , a 2 ) of the filling members 522a, 522b, and 522c are appropriately set according to the load bearing performance and weight required for the frame 1.
[0123]
　(Fourth Arrangement Example)
　FIG. 20 is a sectional view of the frame 1 for explaining a fourth arrangement example of the filling member according to the present embodiment. The cross-sectional view shown in FIG. 20 corresponds to the cross section of the frame 1 taken along the line VV of the frame 1 shown in FIG.
[0124]
　As shown in FIG. 20, the filling member 523 according to the present arrangement example is arranged in close contact (preferably adhesion) with the inner surfaces of the bottom wall 2a and the pair of side walls 2b. In the side wall portion 2b, bending of the frame 1 tends to cause tilting in the out-of-plane direction. According to the arrangement shown in FIG. 20, since the filling member 523 is also arranged in close contact with the inner surface of the side wall portion 2b, the filling member 523 can suppress the out-of-plane deformation of the side wall portion 2b. Even if the frame 1 is bent, the filling member 523 suppresses the side wall portion 2b from tilting in the out-of-plane direction, so that the collision energy is absorbed by the crushing of the frame 1 while suppressing the cross-sectional deformation of the frame 1. be able to. That is, not only the load bearing performance of the frame 1 but also the collision energy absorption characteristics of the frame 1 can be improved.
[0125]
　Note that the filling member 523 shown in FIG. 20 is arranged in close contact with the pair of side wall portions 2b and the bottom wall portion 2a, but the present invention is not limited to this example. For example, the filling member 523 may be separately and closely attached to the inner surfaces of the pair of side wall portions 2b and the bottom wall portion 2a. In addition, the filling member 523 may be arranged in close contact with any one of the pair of side wall portions 2b and the bottom wall portion 2a continuously. That is, the filling member 523 may be provided in an L shape in a cross section orthogonal to the Y axis direction. That is, if the filling member 523 is provided on each of the pair of side wall portions 2b and the bottom wall portion 2a, not only the load bearing performance of the frame 1 but also the absorption energy of the collision energy of the frame 1 can be improved. it can. The arrangement position and the filling amount of the filling member can be appropriately set according to the collision safety performance and the weight required for the frame 1. Further, the wall thicknesses a 1 , a 2 and a 3 of the filling member 523 shown in FIG. 20 can also be set appropriately.
[0126]
　Further, the arrangement of the filling members shown in FIG. 20 can be similarly applied to the cross section of the frame 1 taken along the line VI-VI of the frame 1 shown in FIG. In this case, the filling member 523 is arranged in continuous contact with the pair of side wall portions 2b and the top wall portion 3a.
[0127]
　Note that the arrangement of the filling member according to the present embodiment shown in FIGS. 13 to 20 is also applicable to a frame formed of a hollow member having no bend inducing portion realized by a bent portion or a hole portion. Can be applied. For example, when the frame 1 shown in FIG. 11 is not provided with the bent portion, the filling member 5 may be provided on the bottom wall portion 2a and the top wall portion 3a of the hollow member 10 along the longitudinal direction of the hollow member 10. .. Thereby, even if the frame 1 is bent such that the bottom wall portion 2a or the top wall portion 3a is bent inside at the time of collision, the cross-sectional deformation of the frame 1 can be suppressed. That is, by disposing the filling member 5 in close contact with the inner surface of the hollow member 10 corresponding to the direction in which it is desirable not to bend, bending of the frame 1 in at least that direction can be suppressed.
[0128]
　<<4. Third Embodiment>> In
　the third embodiment, a resin material is arranged in the bending inducing portion so as to be in close contact with at least one inner surface of the pair of side wall portions of the metal member.
　<4.1. Configuration of Frame>
　(Components of Frame)
　FIG. 21 is a perspective view showing a schematic configuration of an example of the frame 1 according to the third embodiment of the present invention. As shown in FIG. 21, the frame 1 according to this embodiment includes a first structural member 2, a second structural member 3, and a filling member 5 (5A, 5B). The hollow member 10 according to the present embodiment is formed by the first structural member 2 and the second structural member 3. The structure of the frame 1 shown in FIG. 21 is the same as that described in the first embodiment with reference to FIGS. 2 to 4 except that the reinforcement 4 is not provided and the filling member 5 is arranged. Hereinafter, an example of the arrangement of the filling member 5 inside the frame 1 according to the present embodiment will be described.
[0129]
　(Arrangement of Filling Member)
　FIG. 22 is a cross-sectional view showing a cross section orthogonal to the Z-axis direction of an example of the frame 1 according to the present embodiment. The sectional view shown in FIG. 22 corresponds to the sectional view of the hollow member 10 taken along the section line VII-VII shown in FIG. As shown in FIG. 22, the hollow member 10 is provided with a bent portion 6A that bends in a direction in which the bottom wall portion 2a is bent inward, and a bent portion 6B that is bent in a direction in which the top wall portion 3a is bent inward. ing. These bent portions 6 correspond to bend inducing portions in the frame 1. As shown in FIGS. 21 and 22, the filling members 5A and 5B according to the present embodiment are arranged in close contact with the inner surface of the side wall portion 2b where the bent portions 6A and 6B are provided.
[0130]
　The definitions of the symbols of the respective dimensions attached to the frame 1 shown in FIG. 22 are as follows.
　　L FL : Length of the hollow member 10 in the Y-axis direction (longitudinal direction).
　　D FL1 : Cross-sectional dimension in the X-axis direction at the end of the hollow member 10 on the collision side.
　　D FL2 : Cross-sectional dimension in the X-axis direction at the other end of the hollow member 10.
　　S FL : Offset length of the second structural member 3 before and after the bent portion 6 in the longitudinal direction.
　　L FMA , L FMB : Lengths of the filling members 5A and 5B in the Y-axis direction.
[0131]
　FIG. 23 is a sectional view taken along the line VIII-VIII of the frame 1 shown in FIG. As shown in FIG. 23, the filling member 5A is arranged in close contact (preferably adhesion) with the inner surface of the side wall portion 2b. Similarly, in the filling member 5B, the filling member 5B is arranged in close contact with the inner surface of the side wall portion 2b in the cross section taken along the line IX-IX of the frame 1 shown in FIG.
[0132]
　With this arrangement, the filling member 5A restrains the side wall portion 2b, so that the out-of-plane deformation of the side wall portion 2b can be suppressed. That is, in the bending deformation of the frame 1 when the collision load is input to the frame 1, it is possible to prevent the side wall portion 2b in which the filling member 5A is arranged from falling out of the plane. Therefore, since the cross-sectional deformation of the frame 1 is suppressed even after the bending deformation of the frame 1, it is possible to enhance the collision energy absorption characteristic of the frame 1. Further, since the arrangement of the filling member 5A is limited to the location that contributes to the shock absorption, the hollow member does not become heavy.
[0133]
　Further, in the example shown in FIG. 23, the filling member 5A is arranged in close contact with the side wall portion 2b and the bottom wall portion 2a continuously. That is, the filling member 5A is arranged in close contact with the inside of the ridge 2d. When the collision load on the frame 1 is input and the bending portion 6A is bent, plastic deformation locally occurs at the ridge portion 2d. This plastic deformation promotes the falling of the side wall portion 2b in the out-of-plane direction. Therefore, by placing the filling member 5A in close contact with such a position, it is possible to suppress local plastic deformation that occurs in the ridge portion 2d. As a result, it is possible to prevent the side wall portion 2b from falling out of the plane. Therefore, the absorption characteristic of the collision energy of the frame 1 can be enhanced more effectively.
[0134]
　Further, as shown in FIG. 23, the filling member 5A may be arranged in close contact with the side wall portion 2b and the ceiling wall portion 3a continuously. As a result, it is possible to suppress local plastic deformation that occurs in the ridge portion 2e. As a result, the cross-sectional deformation of the hollow member 10 can be suppressed, and the collision safety performance of the frame 1 can be further enhanced. As shown in FIG. 23, the filling member 5A is preferably arranged in close contact with the inside of at least one of the ridge portions 2d and 2e. At this time, the bent portion 6A is bent in the direction in which the bottom wall portion 2a is bent inside. On the inner side of the bend, a force acts in the compression direction due to the bending of the frame 1, so that the ridge portion is likely to be plastically deformed. Therefore, it is more preferable that the filling member 5A is disposed at least in close contact with the inside of the ridge line portion 2d existing at the boundary between the bottom wall portion 2a and the side wall portion 2b.
[0135]
　Further, in the example shown in FIG. 23, the filling member 5A is arranged on the inner surface of the upper side wall portion 2b toward the drawing, but it may be arranged on the inner surface of the lower side wall portion 2b. Further, the wall thickness a of the filling member 5A is not particularly limited, and the wall thickness a is appropriately set according to the collision energy absorption characteristics and weight required for the frame 1. In order to control the wall thickness a of the filling member 5A, for example, a plate material such as a reinforcement (not shown) may be provided inside the hollow member 10.
[0136]
　In the present invention, “close contact” means that they are arranged in contact with each other without a gap. Of the close contact, the adhesion for restraining each other is most preferable. Even when they are not constrained to each other, the effect of the filling member 5 suppressing the out-of-plane deformation of at least one of the walls forming the hollow member 10 is exhibited. For example, it is assumed that the cross-sectional shape change shown in FIGS. 129 and 130 occurs in the frame 1 according to the present embodiment. When the filling member 5 is adhered to the inner surface of the side wall portion 2b and the side wall portion 2b is out-of-plane deformed, the filling member 5 also follows the out-of-plane deformation of the inner surface. Therefore, the effect of suppressing the out-of-plane deformation of the side wall portion 2b by the filling member 5 is remarkably exhibited. In addition, when the filling member 5 and the inner surface of the side wall portion 2b are disposed in close contact with each other without being restrained, when the side wall portion 2b is out-of-plane deformed, the filling member 5 and the inner surface may be partially separated from each other. Exists. However, even when the inner surface is out-of-plane deformed, it remains in contact with at least a part of the filling member 5. Therefore, even when the filling member 5 and the inner surface are in close contact with each other without being restrained, the effect of suppressing the out-of-plane deformation of the side wall portion 2b by the filling member 5 is sufficiently exerted.
[0137]
　Here, the higher the Young's modulus of the filling member 5, the higher the effect of suppressing the plastic deformation described above by the filling member 5. However, in order to increase the Young's modulus of the filling member 5, it is necessary to mold the resin with high density. That is, when the Young's modulus of the filling member 5 is increased, the mass per unit volume of the filling member 5 increases. In the present embodiment, the place where the cross-section deformation occurs, that is, the place where the cross-section deformation should be suppressed can be limited to the bent portion 6 or its periphery. Therefore, the place where the filling member 5 should be placed can be limited in anticipation of the place where the cross-section is deformed. That is, in this embodiment, it is possible to reduce the weight increase due to the increase in the Young's modulus of the filling member 5. As described above, in this embodiment, it is possible to improve the collision safety performance with high mass efficiency.
[0138]
　The arrangement of the filling member 5A, and the operation and effect of the arrangement have been described above. The above-described actions and effects are similarly exerted by the filling member 5B arranged inside the bent portion 6B.
[0139]
　As described above, in the frame 1 according to the present embodiment, the filling member 5 is arranged in close contact with the inner surface of the side wall portion 2b included inside the bending portion 6 which is the bending inducing portion. With this configuration, when a collision load is input to the frame 1 and bending deformation occurs in the frame 1, it is possible to suppress the out-of-plane deformation of the side wall portion 2b. Thereby, even after the frame 1 is bent, the collapse of the cross section of the frame 1 can be suppressed. Therefore, even when the plate thickness of the hollow member 10 is reduced in order to reduce the weight of the vehicle body, the weight of the frame 1 is significantly increased by disposing the filling member 5 having a low mass density in the above-mentioned portion. Therefore, the absorption characteristic of the collision energy of the frame 1 can be maintained high.
[0140]
　21 and 22, the bending members 6A and 6B are provided with the filling members 5A and 5B separately, but one filling member 5 is provided across the bending portions 6A and 6B. It may be. That is, as long as the filling member 5 is provided in close contact with at least the side wall portion 2b included inside the bending inducing portion, the arrangement position and size of the filling member 5 in the longitudinal direction of the hollow member 10 are not particularly limited.
[0141]
　<4.2. Arrangement Example of Filling Member> The arrangement of the
　filling members 5A and 5B according to the present embodiment has been described above. The arrangement of the filling member 5 is not limited to the examples shown in FIGS. 21 to 23. Hereinafter, another arrangement example of the filling member 5 will be described.
[0142]
　In the following first arrangement example and second arrangement example, out-of-plane deformation of the side wall portion 2b is suppressed by the filling member 530a or 531a arranged in close contact with the side wall portion 2b. As a result, the cross-sectional deformation of the frame 1 can be suppressed.
[0143]
　(First Arrangement Example)
　FIG. 24 is a sectional view of the frame 1 for explaining the first arrangement example of the filling member according to the present embodiment. The cross-sectional view shown in FIG. 24 corresponds to the cross section of the frame 1 taken along the line VIII-VIII of the frame 1 shown in FIG.
[0144]
　As shown in FIG. 24, the filling members 530a and 530b according to this arrangement example are arranged in close contact (preferably adhered) to the inner surfaces of the pair of side wall portions 2b. With such an arrangement, it is possible to suppress the out-of-plane deformation of each side wall portion 2b and prevent the side wall portion 2b from falling in the out-of-plane direction. That is, since the cross-sectional deformation of the frame 1 can be suppressed more reliably than when one filling member is arranged for one side wall portion 2b, the absorption characteristic of the collision energy of the frame 1 can be further improved. it can. Further, the filling members 530a and 530b are arranged in close contact with the insides of the ridge portions 2d and 2e, respectively. Therefore, it is possible to suppress the plastic deformation in each ridge portion and further suppress the cross-sectional deformation of the frame 1.
[0145]
　However, by providing the filling members 530a and 530b on the frame 1, the weight of the entire frame 1 is increased. Therefore, it is preferable to determine whether to provide the filling member on the inner surface of one or both of the side walls 2b according to the collision safety performance and the weight required for the frame 1. Further, the wall thickness a 1 of the filling member 530a and the wall thickness a 2 of the 530b are appropriately set.
[0146]
　The arrangement of the filling members shown in FIG. 24 can be similarly applied to the cross section of the frame 1 taken along the line IX-IX of the frame 1 shown in FIG.
[0147]
　(Second Arrangement Example)
　FIG. 25 is a sectional view of the frame 1 for explaining a second arrangement example of the filling member according to the present embodiment. The cross-sectional view shown in FIG. 25 corresponds to the cross section of the frame 1 taken along line VIII-VIII of the frame 1 shown in FIG.
[0148]
　As shown in FIG. 25, the filling members 531a and 531b according to the present arrangement example are arranged in close contact (preferably adhered) to the central portions of the inner surfaces of the pair of side wall portions 2b. As described above, even if the filling members 531a and 531b are not disposed inside the ridges 2d and 2e, the out-of-plane deformation of the side wall 2b is suppressed, and the side wall 2b falls down in the out-of-plane direction. Can be locally prevented. Therefore, the absorption characteristics of the collision energy of the frame 1 can be improved.
[0149]
　Further, in the example shown in FIG. 25, the filling members 531a and 531b are arranged in close contact with the respective inner surfaces of the side wall portion 2b, but the filling member is arranged only on one of the inner surfaces of the side wall portion 2b. May be. Whether the filling member is provided on one or both inner surfaces of the side wall portion 2b is preferably determined according to the collision safety performance and the weight required of the frame 1. The filling member thickness a of 531a 1 and 531b thick a 2 , the distance from the top wall 3a of the filling member 531a on the side wall 2b b 1 and b 3 , and a distance b from the bottom wall 2a 2 And b 4 can be set appropriately.
[0150]
　In addition, as described above, the inclination of the side wall portion 2b in the out-of-plane direction is caused by the plastic deformation of the ridge portion 2d (2e). Therefore, it is preferable that the filling member 5 that is placed in close contact with the inner surface of the side wall portion 2b is also placed in close contact with the inside of the ridge line portion 2d (2e). As a result, the effect of suppressing the cross-sectional deformation of the frame 1 by the filling member can be further enhanced.
[0151]
　The arrangement of the filling members shown in FIG. 25 can be similarly applied to the cross section of the frame 1 taken along the line IX-IX of the frame 1 shown in FIG.
[0152]
　The first arrangement example and the second arrangement example have been described above. In the third to fifth arrangement examples below, the filling member is arranged in close contact with the side wall portion 2b and the bottom wall portion 2a connected to the side wall portion 2b. Since the ridge portion 2d is constrained by the filling member, the deformation of the ridge portion 2d is suppressed. As a result, the cross-sectional deformation of the frame 1 can be suppressed.
[0153]
　(Third Arrangement Example)
　FIG. 26 is a sectional view of the frame 1 for explaining a third arrangement example of the filling member according to the present embodiment. The cross-sectional view shown in FIG. 26 corresponds to the cross section of the frame 1 taken along line VIII-VIII of the frame 1 shown in FIG.
[0154]
　As shown in FIG. 26, the filling member 532 according to the present arrangement example is continuously and closely (preferably adhered) arranged to the inner surfaces of the pair of side wall portions 2b and the bottom wall portion 2a. At this time, since the bent portion 6A is bent in the direction in which the bottom wall portion 2a is bent inside, the filling member 532 is arranged in the bent inner portion of the bent portion 6A. At the bottom wall portion 2a, which is the inner side of the bending, a force acts in the compression direction due to the bending of the frame 1, so that out-of-plane deformation easily occurs. According to the arrangement shown in FIG. 26, since the filling member 532 is also arranged in close contact with the inner surface of the bottom wall portion 2a, the filling member 532 can suppress the out-of-plane deformation of the bottom wall portion 2a. .. As a result, even if a high collision load acts on the frame 1, it is possible to suppress the collapse of the cross section of the frame 1. That is, not only the collision energy absorption characteristics of the frame 1 but also the load bearing performance of the frame 1 can be improved.
[0155]
　Although the filling member 532 shown in FIG. 26 is arranged in close contact with the pair of side wall portions 2b and the bottom wall portion 2a, the present invention is not limited to this example. For example, the filling member 532 may be separately and closely attached to the inner surfaces of the pair of side wall portions 2b and the bottom wall portion 2a. Further, the filling member 532 may be arranged so as to be in continuous contact with any one of the pair of side wall portions 2b and the bottom wall portion 2a. That is, the filling member 532 may be provided in an L shape in a cross section orthogonal to the Y axis direction. That is, if the filling member 532 is provided on any one of the pair of side wall portions 2b and the bottom wall portion 2a, not only the collision energy absorption characteristics of the frame 1 but also the load bearing performance of the frame 1 can be improved. it can. The arrangement position and the filling amount of the filling member can be appropriately set according to the collision safety performance and the weight required for the frame 1. Further, the wall thicknesses a 1 , a 2 and a 3 of the filling member 532 shown in FIG. 26 can be set appropriately.
[0156]
　The arrangement of the filling members shown in FIG. 26 can be similarly applied to the cross section of the frame 1 taken along the line IX-IX of the frame 1 shown in FIG. In this case, the filling member 532 is arranged in continuous contact with the pair of side wall portions 2b and the top wall portion 3a.
[0157]
　(Fourth Arrangement Example)
　FIG. 27 is a cross-sectional view of the frame 1 for explaining a fourth arrangement example of the filling member according to the present embodiment. The cross-sectional view shown in FIG. 27 corresponds to the cross section of the frame 1 taken along line VIII-VIII of the frame 1 shown in FIG.
[0158]
　As shown in FIG. 27, the filling members 533a and 533b according to this arrangement example are arranged so as to locally adhere (preferably adhere) to the inside of each of the ridge portions 2d. With such an arrangement, it is possible to suppress local plastic deformation that occurs in the ridge portion 2d. Thereby, the inclination of the side wall portion 2b in the out-of-plane direction can be reduced. Therefore, the cross-sectional deformation of the frame 1 can be suppressed, and the collision energy absorption characteristics of the frame 1 can be improved. Further, in the example shown in FIG. 27, since the filling members 533a and 533b are locally and closely attached to the inside of the ridge line portion 2d, the cross-sectional deformation of the frame 1 can be prevented with almost no increase in the weight of the frame 1. Can be suppressed.
[0159]
　(Fifth Arrangement Example) The
　filling member 533c according to the present embodiment may be arranged so as to locally adhere (preferably adhere) to the inside of at least one of the ridge portions 2d. FIG. 28 is a cross-sectional view of the frame 1 for explaining a fifth arrangement example of the filling member according to this embodiment. The cross-sectional view shown in FIG. 28 corresponds to the cross section of the frame 1 taken along line VIII-VIII of the frame 1 shown in FIG.
[0160]
　As shown in FIG. 28, the filling member 533c according to the present arrangement example is arranged locally in close contact with one inner side of the ridge portion 2d. As a result, it is possible to suppress local plastic deformation that occurs in the ridge line portion 2d where the filling member 533c is arranged. Further, since the filling amount of the filling member can be reduced, it is possible to avoid increasing the weight of the frame 1.
[0161]
　According to the arrangement example of the filling members shown in FIGS. 27 and 28, not only the out-of-plane deformation of the side wall portion 2b but also the local plastic deformation of the ridge line portion 2d can be suppressed. Therefore, as compared with the second arrangement example shown in FIG. 25, it is possible to more effectively prevent the side wall portion 2b from tilting in the out-of-plane direction.
[0162]
　It should be noted that it is preferable to determine whether the filling member is provided inside one or both of the ridge portions 2d in accordance with the collision safety performance and the weight required for the frame 1. The thicknesses a(a 1 , a 2 ) in the Z-axis direction and the thicknesses c(c 1 , c 2 ) in the X-axis direction of the filling members 533a, 533b, and 533c are set appropriately.
[0163]
　Further, the filling member may be arranged not only inside the ridge line portion 2d but also in close contact with the inner surface of the bottom wall portion 2a. FIG. 29 is a cross-sectional view of the frame 1 for explaining modified examples of the fourth arrangement example and the fifth arrangement example of the filling member according to the present embodiment. As shown in FIG. 29, the filling member 534 may be arranged not only on the inner side of the ridge 2d but also on the inner surface of the bottom wall 2a. As a result, the collision energy absorption characteristics of the frame 1 can be made equal to or higher than those of the arrangement examples shown in FIGS. 27 and 28. The thickness a of the filling member 534 is appropriately set according to the collision safety performance and weight required for the frame 1.
[0164]
　The arrangement of the filling members shown in FIGS. 27 to 29 can be similarly applied to the cross section of the frame 1 taken along the line IX-IX of the frame 1 shown in FIG. In this case, the filling members 533a, 533b, 533c, and 534 are arranged in close contact with the inside of the ridge 2e (for the filling member 534, the inner surface of the top wall 3a).
[0165]
　<<5. Fourth Embodiment>>
　The fourth embodiment is a form in which a resin material is arranged in a bend inducing portion through a hole provided in a first metal plate forming a metal member.
[0166]
　As described in the first to third embodiments, by disposing the filling member 5 in the bending inducing portion provided in the frame 1, it is possible to improve the energy absorption amount when a load is input. However, when the frame 1 is bent and deformed, the frame 1 is likely to be out-of-plane deformed. Then, when the adhesive force of the filling member 5 to the frame 1 is insufficient, the filling member 5 may peel off from the inner wall of the frame 1 depending on the degree of deformation of the frame 1.
[0167]
　FIG. 131 is a partial cross-sectional view showing a configuration example of the frame 920 in which the filling member 925 is arranged. As shown in FIG. 131, a filling member 925 is arranged in close contact with the inner wall surface 922A of the wall portion 922 of the frame 920. However, as shown in FIG. 132, when the wall portion 922 is out-of-plane deformed at the deformation position BP, if the adhesive force of the filled and cured filling member 925 is insufficient, the deformation of the wall portion 922 causes the filling member to deform. 925 may peel off from the inner wall surface 922A. In this case, the effect of suppressing the deformation of the wall portion of the frame by the filling member is not sufficiently exerted, and it becomes difficult to achieve the expected collision performance.
[0168]
　Therefore, the present embodiment provides a technique in which the filling member 5 can stably contribute to the collision safety performance.
[0169]
　<5.1. First Example>
　FIG. 30 is a partial cross-sectional view showing a structural example of an example of the frame 100 according to the fourth embodiment of the present invention.
[0170]
　As shown in FIG. 30, the frame 100 includes a hollow member 110 and a filling member 50.
[0171]
　The direction V (V1, V2) shown in FIGS. 30 to 37 indicates the outside of the hollow member 110.
[0172]
　The hollow member 110 according to this embodiment is an example of the metal member described above. Specifically, the hollow member 110 is a structural member having a wall portion 20 extending in the longitudinal direction. The hollow member 110 has a so-called frame shape and is composed of a plurality of wall portions 20. The wall portion 20 according to the present embodiment is an example of the above-mentioned first metal plate. The hollow member 110 may have a hollow closed cross-section structure or an open cross-section structure such as a U shape. The shape of the cross section of the hollow member 110 orthogonal to the longitudinal direction is not particularly limited. For example, the cross-sectional shape of the hollow member 110 may be a rectangular cross section or a circular cross section.
[0173]
　Further, at least one wall hole 21 is provided in the wall portion 20 of the hollow member 110. The method of processing the wall holes 21, and the number and shape of the wall holes 21 are not particularly limited. The wall hole 21 according to the present embodiment is an example of a hole portion.
[0174]
　The filling member 50 is an example of the resin material described above. The filling member 50 is made of urethane resin, epoxy resin, or any other resin. The filling member 5 can be formed with a Young's modulus of up to about 300 MPa if it is a urethane resin and up to about 3000 MPa if it is an epoxy resin. The filling member 50 may be a hard foam filling member made of a foam resin material, for example. The foamed resin is set inside the hollow member 110 and then cured by a chemical change. The Young's modulus of the filling member 50 is preferably 20 MPa or more. The Young's modulus of the filling member 50 can be changed according to the density of the resin forming the filling member 50. However, since the higher the density is, the more difficult the molding is, the Young's modulus of the filling member 50 is preferably 300 to 400 MPa at the maximum.
[0175]
　When the filling member 50 is installed inside the hollow member 110, the filling member 50 is arranged so as to be in close contact with the inner wall surface 20A of the wall portion 20. A portion of the filling member 50 that is in close contact with the inner wall surface 20A is referred to as a first filling portion 51. For example, the first filling portion 51 is formed by introducing foamed resin inside the hollow member 110. At this time, the first filling portion 51 comes into close contact with the inner wall surface 20A at the contact surface 51a. The first filling portion 51 is an example of the first reinforcing portion.
[0176]
　The filling member 50 is arranged not only inside the hollow member 110 but also through the wall hole 21 and in close contact with the outer wall surface 20B of the wall portion 20. A portion of the filling member 50 that comes into close contact with the outer wall surface 20B is referred to as a second filling portion 52. For example, the second filling portion 52 is formed by introducing a foamed resin into the hollow member 110, and the foamed foamed resin bulges outward from the inside of the hollow member 110 through the wall hole 21. .. At this time, the second filling portion 52 comes into close contact with the outer wall surface 20B at the contact surface 52a. The second filling portion 52 is an example of the second reinforcing portion.
[0177]
　Further, a portion of the filling member 50 provided in close contact with the wall hole 21 is referred to as a third filling portion 53. That is, the filling member 50 is integrally formed by the first filling portion 51, the second filling portion 52, and the third filling portion 53. The first filling portion 51 and the second filling portion 52 are connected via the third filling portion 53. The third filling portion 53 is an example of the third reinforcing portion.
[0178]
　The second filling portion 52 of the filling member 50 is formed by the filling member filled inside the hollow member 110 penetrating the wall hole 21 and leaking to the outside of the hollow member 110. For example, the second filling portion 52 is provided in close contact with the wall portion 20 in the range of the distance p from the hole edge 22 of the wall hole 21 in the cross-sectional view of the wall hole 21. In order to obtain sufficient adhesion of the second filling portion 52 to the outer wall surface 20B, the distance p is preferably, for example, 5 mm or more.
[0179]
　According to such a configuration, the filling member 50 penetrates the wall hole 21 provided in the wall portion 20 of the hollow member 110 and adheres to both surfaces of the wall portion 20. Then, the filling member 50 is mechanically hooked to the wall hole 21, so that the filling member 50 is locked to the wall portion 20. In this case, whether or not the filling member 50 falls off the wall portion 20 is determined not by the adhesive force of the filling member 50 with respect to the wall portion 20 but by the tensile strength of the filling member 50. Generally, the tensile strength of the filling member 50 is significantly higher than the adhesive force of the filling member 50, so that the filling member 50 is less likely to fall off the wall portion 20 easily.
[0180]
　FIG. 31 is a partial cross-sectional view showing an example of the operation of the frame 100 according to this embodiment. In the configuration of the frame 100, it is assumed that a collision load acts on the hollow member 110 in the longitudinal direction. In this case, for example, as shown in FIG. 31, buckling that protrudes outward of the hollow member 110 (direction V in the drawing) occurs at the deformation position BP near the wall hole 21, and the wall portion 20 is hollow. It is assumed that an action of bending is applied to the inside of the member 110. In addition, in this specification, the inward direction is the direction opposite to the direction V in the drawing, and means the direction toward the center of gravity of the hollow member 110.
[0181]
　Here, the filling member 50 is locked to the wall portion 20 by the second filling portion 52 which penetrates the wall hole 21 and is connected to the first filling portion 51. Therefore, for example, even if the wall portion 20 tries to bend inward of the hollow member 110, the first filling portion 51 follows the second filling portion 52, so that the first filling portion 51 is restrained by the wall portion 20. Is maintained.
[0182]
　Then, even if the adhesive force of the filling member 50 to the wall portion 20 inside the hollow member 110 is not sufficiently secured, the filling member 50 is less likely to fall off the wall portion 20 easily. Accordingly, even if a force that causes the wall portion 20 to undergo out-of-plane deformation due to a vehicle collision is applied, the filling member 50 can be kept in close contact with the wall portion 20 of the hollow member 110. Therefore, as a result, the first filling portion 51 of the filling member 50 restrains the deformation of the wall portion 20 in the out-of-plane direction, so that the out-of-plane deformation of the wall portion 20 can be suppressed. That is, the filling member 50 can stably contribute to the collision safety performance of the frame 100.
[0183]
　The third filling portion 53 connecting the first filling portion 51 and the second filling portion 52 is preferably densely filled. This is because the dense filling of these prevents the filling member 50 from shifting in the direction perpendicular to the axis of the wall hole 21 and contributes to preventing the filling member 50 from peeling. Further, the third filling portion 53 that connects the first filling portion 51 and the second filling portion 52 does not necessarily have to be densely filled in the wall hole 21. For example, the third filling portion 53 does not have to be in close contact with the hole edge 22 of the wall hole 21. Even in this case, if the first filling portion 51 and the second filling portion 52 are connected, the state in which the filling member 50 is locked to the hollow member 110 is realized. Moreover, the inside of the filling member 50 does not necessarily need to be densely filled.
[0184]
　(Modification)
　Next, a modification of the configuration of the filling member 50 will be described.
[0185]
　FIG. 32 is a partial cross-sectional view showing a configuration example of the frame 100A according to the first modified example of the present embodiment. As shown in FIG. 32, a plurality of wall holes 21 are provided in the wall portion 20 of the hollow member 110A that constitutes the frame 100A according to this modification. Further, the filling member 50 is provided so as to penetrate these wall holes 21 and to be in close contact with the inner wall surface 20A and the outer wall surface 20B of the wall portion 20. That is, the filling member 50 includes the first filling portion 51 that is in close contact with the inner wall surface 20A of the wall portion 20 and the plurality of second filling portions that are in close contact with the outer wall surface 20B of the wall portion 20 at each position of the plurality of wall holes 21. 52 and a third filling portion 53 that is provided in close contact with each of the plurality of wall holes 21 and connects the first filling portion 51 and the plurality of second filling portions 52.
[0186]
　With such a configuration, the number of portions that lock the filling member 50 with the wall portion 20 increases according to the number of the wall holes 21 through which the filling member 50 penetrates. Thereby, the filling member 50 can be more firmly fixed to the wall portion 20.
[0187]
　Further, with such a configuration, the filling member 50 can be made to follow the wall portion 20 regardless of the direction in which the wall portion 20 is about to bend. FIG. 33 is a partial cross-sectional view showing an example of the operation of the frame 100A according to this modification. In the configuration of the frame 100A, it is assumed that a collision load acts on the hollow member 110A in the longitudinal direction. In this case, for example, as shown in FIG. 33, buckling that protrudes inward of the hollow member 110A (opposite to the direction V in the drawing) occurs at the deformation position BP near the wall hole 21, and the wall portion 20 tends to bend outward of the hollow member 110A.
[0188]
　In this case, when the filling member 50 is simply brought into close contact with only the inner wall surface 20A of the wall portion 20, the wall portion 20 tends to bend toward the outside of the hollow member 110, so that the filling member 50 of the wall portion 20 is bent. It peels off from the inner wall surface 20A. However, the filling member 50 is locked in the plurality of wall holes 21 by each of the second filling portions 52 that penetrate and connect to the plurality of wall holes 21. Then, in the example shown in FIG. 33, even if the wall portion 20 tries to bend outward, the first filling portion 51 follows the second filling portion 52, so that the first filling portion 51 is restrained by the wall portion 20. The maintained state is maintained.
[0189]
　Then, even if a force that causes the out-of-plane deformation of the hollow member 110A acts on the hollow member 110A due to a vehicle collision, the filling member 50 can be kept in close contact with the wall portion 20 of the hollow member 110A. Therefore, as a result, the first filling portion 51 of the filling member 50 restrains the deformation of the wall portion 20 in the out-of-plane direction, so that the out-of-plane deformation of the wall portion 20 can be suppressed. That is, the filling member 50 can stably contribute to the collision safety performance of the frame 100A.
[0190]
　FIG. 34 is a partial cross-sectional view showing a configuration example of the frame 100B according to the second modified example of the present embodiment. As shown in FIG. 34, the first filling portion 51 of the filling member 50 according to the present modification is arranged inside the ridge line portion 23 of the wall portion 20 of the hollow member 110A. Wall holes 21 are provided on both sides of the ridge line portion 23 of the wall portion 20, respectively. The filling member 50 penetrates these wall holes 21 and is provided in close contact with the inner wall surface 20A and the outer wall surface 20B of the wall portion 20.
[0191]
　When the wall portion 20 of the hollow member 110B is out-of-plane deformed, plastic deformation locally occurs at the ridge line portion 23. This plastic deformation promotes the fall of the wall portion 20 in the out-of-plane direction. Therefore, by disposing the filling member 50 in close contact with the inside of the ridge portion 23, it is possible to suppress the local plastic deformation that occurs in the ridge portion 23.
[0192]
　Further, by fixing the filling member 50 to the wall portion 20 with the above-described configuration, it is possible to prevent the filling member 50 from falling off the wall portion 20 due to the plastic deformation that occurs in the ridge line portion 23. Therefore, it is possible to more reliably suppress the out-of-plane deformation of the wall portion 20.
[0193]
　The number of wall holes 21 provided in the wall portion 20 is not particularly limited. The wall hole 21 is preferably provided in each of the wall portions 20 that sandwich the ridge line portion 23. Then, it is possible to suppress the out-of-plane deformation of the hollow member 110B so that the corners of the ridge line portion 23 are opened. By providing the wall holes 21 in the plurality of wall portions 20, the number of places where the first filling portion 51 and the second filling portion 52 of the filling member 50 are connected to each other is increased. Then, the first filling portion 51 and the second filling portion 52 are pulled by the deformation of the wall portion 20, but if the number of the third filling portions 53 that are the connecting portions is large, the load of each connecting portion is large. Distributed. Therefore, the fixing force of the filling member 50 to the wall portion 20 can be increased by increasing the number of the wall holes 21. However, the rigidity of the hollow member 110 may be reduced by increasing the number of the wall holes 21. Therefore, the number and installation positions of the wall holes 21 may be appropriately determined according to the design.
[0194]
　FIG. 35 is a partial cross-sectional view showing a configuration example of a frame 100C according to the third modified example of the present embodiment. As shown in FIG. 35, the hole edge 22A of the wall hole 21A is located inside the hollow member 110C rather than the wall portion 20. Specifically, the wall portion 20 includes an inclined portion 24 that is inclined inward of the hollow member 110C in the vicinity of the wall hole 21A.
[0195]
　Here, as shown in FIG. 35, the filling member 50 is arranged so as to bite into the inclined portion 24 and in close contact with the inside and outside of the wall portion 20. The second filling portion 52 is provided in close contact with the inclined surface 24A of the inclined portion 24 of the outer wall surface 20B of the wall portion 20.
[0196]
　With such a configuration, the outer side surface 52b of the second filling portion 52 and the outer wall surface 20B of the wall portion 20 can be flush with each other. Then, even if the filling member 50 bulges outward from the inside of the wall portion 20 through the wall hole 21A, the bulging portion can be removed and the outer wall surface 20B of the wall portion 20 can be made flat. Therefore, the swelling of the filling member 50 does not cause interference with other members. Therefore, handling of the frame 100 becomes easy. The second filling portion 52 is, for example, a portion in which foamed resin is introduced inside the hollow member 110C, and the foamed foamed resin penetrates the wall hole 21A from the inside of the hollow member 110C and bulges outward. Obtained by excision. Alternatively, the wall hole 21A may be covered along the outer wall surface 20B before the foamed resin solidifies, and the foamed resin protruding from the outer wall surface 20B may be pushed in. In addition, if there is no reason for cutting such as interference with other members, the portion of the second filling portion 52 that bulges outside the outer wall surface 20B of the wall portion 20 may not be cut.

Claim

The scope of the claims

[Request 1]A hollow metal member having a bend-inducing portion in a part of the longitudinal direction,
　and a resin material made of a resin having a Young's modulus of 20 MPa or more and being in close contact with the metal member and arranged in the bend-inducing portion
. Element.
[Request 2]
　The metal member includes a bottom wall portion, a pair of side wall portions standing up from both ends of the bottom wall portion, and a ceiling wall portion facing the bottom wall portion, the bottom wall portion, the pair of side wall portions. The hollow member according to claim 1, wherein the top wall portion forms a closed cross section.
[Request 3]
　The hollow member according to claim 2, wherein the resin material is arranged in close contact with an inner surface of at least one of the bottom wall portion and the top wall portion.
[Request 4]
　The hollow member according to claim 2 or 3, wherein the resin material is disposed in close contact with at least one inner surface of the pair of side wall portions.
[Request 5]
　The hollow member according to any one of claims 1 to 4, wherein a second metal plate is arranged inside the metal member so as to be joined to a first metal plate forming the metal member.
[Request 6]
　The hollow member according to claim 5, wherein the resin material is disposed in close contact with the second metal plate.
[Request 7]
　The first metal plate forming the metal member has a hole portion, the resin material is made of foamed resin, and the resin material penetrates the hole portion and both the outer surface and the inner surface of the first metal plate. The hollow member according to any one of claims 1 to 6, which is disposed in close contact with the hollow member.
[Request 8]
　The hollow member according to claim 7, wherein the hole edge of the hole is located inside the first metal plate that forms the metal member, inside the first metal plate.
[Request 9]
　The hollow member according to claim 8, wherein the hole portion is a burring hole in which a hole edge of the first metal plate forming the metal member protrudes from the outside toward the inside.
[Request Item 10]
　The hole portion is provided with a recessed portion that is recessed inward of the metal member than the first metal plate that forms the metal member, and the
　hole portion is provided inside the recessed portion. The hollow member according to any one of 7 to 9.
[Request 11]
　The hollow member according to any one of claims 1 to 10, wherein the bending inducing portion is a portion where a total plastic moment of the metal member changes in the longitudinal direction.
[Request Item 12]
　12. The bending inducing portion is a portion in which a radius of curvature of a locus of the center of gravity along the longitudinal direction formed by the center of gravity of the cross section of the metal member is 260 mm or less. The hollow member described.
[Request 13]
　The hollow member according to any one of claims 1 to 11, wherein the bending inducing portion is a plate thickness changing portion.
[Request Item 14]
　The hollow member according to any one of claims 1 to 11, wherein the bending inducing portion is a portion provided with a recess.
[Request Item 15]
　The hollow member according to any one of claims 1 to 11, wherein the bending inducing portion is a portion provided with a convex portion.
[Request 16]
　The hollow member according to any one of claims 1 to 11, wherein the bending inducing portion is a portion provided with a hole.
[Request Item 17]
　The hollow member according to any one of claims 1 to 16, wherein the resin material is arranged so as to cover the bending induction portion and peripheral portions on both sides in the longitudinal direction of the bending induction portion.
[Request Item 18]
　Within a range in which the distance from the bend inducing portion to the end of the resin material in the longitudinal direction is ½ or less of the cross-sectional height of the metal member, the resin material is the bend inducing portion, and The hollow member according to claim 17, wherein the hollow member is arranged so as to cover peripheral portions on both sides in the longitudinal direction of the bending inducing portion.
[Request Item 19]
　In the cross section of the metal member, the resin material has the bend inducing portion from a boundary that divides the cross section into two equal parts in a height direction of the cross section defined by a direction from the center of gravity of the cross section toward the bend inducing portion. The hollow member according to any one of claims 1 to 18, which is arranged on the side.
[Request Item 20]
　The hollow member according to any one of claims 1 to 19, wherein the resin material is arranged in a part of the bending inducing portion and is not arranged in another portion of the bending inducing portion.