Specification
Title of invention: Hollow member
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 at the time of 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.
Prior art documents
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 energy absorption amount expected for 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 will be 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 to suppress the out-of-plane deformation that causes the reduction of 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. An object of the present invention is 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]
　In order to solve the above problems, according to the present invention, having a bend inducing portion in a part in the longitudinal direction, a hollow metal member, and closely contacting with the metal member, on both sides of the bending inducing portion in the longitudinal direction. A resin material that is disposed in at least part of a range of less than 5/6 of the sectional height of the metal member from the end of the bend inducing portion toward the outside in the longitudinal direction, A hollow member is provided in which the amount (volume) of the resin material per length in the longitudinal direction is larger outside the bending inducing portion than inside the bending inducing portion.
　In the longitudinal direction, the end of the resin material closer to the bend inducing portion overlaps with the bend inducing portion, or the cross-sectional height of the metal member is outward from the end of the bend inducing portion. It may be arranged in a range of less than 5/6.
　Two said resin materials are arrange|positioned on both sides of the said bending induction part. In addition, the resin material may be one, and may have a cavity at a position overlapping with the bend inducing portion of the resin material in the longitudinal direction, and may have end portions on both sides of the bend inducing portion. The end of the cavity in the longitudinal direction may be located inside the bend inducing portion or outside the bend inducing portion.
[0010]
　In the longitudinal direction, the end of the resin material closer to the bend inducing portion overlaps with the bend inducing portion, or a cross section of the metal member from the end of the bend inducing portion to the outside of the bend inducing portion. It may be arranged in the range of 1 to 2 of the height or less.
[0011]
　The distance in the longitudinal direction from the end of the resin material farther from the bending inducing portion in the longitudinal direction to the end of the bending inducing portion is 5/6 or less of the sectional height of the metal member. May be.
[0012]
　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. Also, a closed cross section may be formed by the top wall portion.
[0013]
　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.
[0014]
　The resin material may be disposed in close contact with the inner surface of at least one of the pair of side wall portions.
[0015]
　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.
[0016]
　The resin material may be disposed in close contact with the second metal plate.
[0017]
　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.
[0018]
　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.
[0019]
　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.
[0020]
　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. ..
[0021]
　The bending inducing portion may be a portion in which the total plastic moment of the metal member changes in the longitudinal direction.
[0022]
　The bend inducing portion may be 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.
[0023]
　The bending inducing portion may be a plate thickness changing portion.
[0024]
　The bend inducing portion may be a portion provided with a recess.
[0025]
　The bending inducing portion may be a portion provided with a convex portion.
[0026]
　The bend inducing portion may be a portion provided with a hole.
[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]
　According to the above configuration, bending deformation is induced by the bending inducing portion when a load is input, while the resin material disposed around both sides of the bending inducing portion in the longitudinal direction causes the bending inducing portion and its surroundings to occur. It is possible to suppress the out-of-plane deformation that occurs in. The periphery of the bend inducing portion means at least a part of a range of less than 5/6 of the sectional height of the metal member from the end in the longitudinal direction of the bend inducing portion toward the outside. 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 assumed 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 periphery of the bending inducing portion in the longitudinal direction, the energy absorption amount at the time of load input can be improved with high mass efficiency.
Effect of the invention
[0029]
　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
[0030]
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.
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 cross-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 the filling member according to the same embodiment.
FIG. 18 is a cross-sectional view of a frame for explaining a modified example 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 modification 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 a frame for describing a first arrangement example of filling members 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 describing 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 the 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 action 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 in a cross section orthogonal to the Z-axis direction of the example of the frame according to the same embodiment.
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 an example of a hole provided in the hollow member according to the embodiment.
FIG. 44 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. 45 is a schematic view showing another example of the 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 view 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 cross-sectional view of a frame for explaining an example of a bead portion 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 schematic diagram showing another example of the recess provided in the hollow member according to the embodiment.
FIG. 53 is a schematic diagram showing another example of a recess provided in the hollow member according to the embodiment.
FIG. 54 is a schematic diagram showing another example of a recess provided in the hollow member according to the embodiment.
FIG. 55 is a schematic diagram showing another example of the recess provided in the hollow member according to the embodiment.
FIG. 56 is a schematic diagram showing an example of the shape and size of a recess according to the embodiment.
FIG. 57 is a schematic diagram showing another example of the recess provided in the hollow member according to the embodiment.
FIG. 58 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. 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 schematic view showing another example of the 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 protrusion provided on the hollow member according to the embodiment.
FIG. 64 is a schematic diagram showing another example of the protrusion provided on the hollow member according to the embodiment.
FIG. 65 is a schematic diagram showing an example of the shape and size of the convex portion according to the embodiment.
FIG. 66 is a schematic view showing another example of the convex portion provided on the hollow member according to the embodiment.
FIG. 67 is a schematic diagram showing an example of a plate thickness changing portion provided in the hollow member according to the embodiment.
FIG. 68 is a schematic diagram showing an example of a thin portion provided in the hollow member according to the embodiment.
FIG. 69 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. 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 schematic view showing another 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 diagram showing an example of a strength changing portion provided in the hollow member according to the embodiment.
FIG. 75 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. 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 the embodiment.
[FIG. 78] FIG. 78 is a cross-sectional view of a frame showing a configuration example in which reinforcements are arranged in parallel with each other in the longitudinal direction inside a hollow member according to an embodiment.
FIG. 79 is a cross-sectional view showing a cross section of the first example of the hollow member according to another embodiment of the present invention, the cross section being orthogonal to the longitudinal direction.
FIG. 80 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, which is orthogonal to the longitudinal direction.
FIG. 81 is a cross-sectional view showing a cross section of a third example of a 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 specific example of the bending inducing portion (bent portion) and the filling member provided in the frame.
FIG. 83 is a cross-sectional view showing another specific example of the bending inducing portion (bent portion) and the filling member provided in the frame.
FIG. 84 is a cross-sectional view showing an example of a hollow member.
FIG. 85 is a cross-sectional view showing another example of the hollow member.
FIG. 86 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. 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 (hole portion) and the filling member provided in the frame.
FIG. 89 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. 90 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. 91 is a cross-sectional view showing a specific example of the bending inducing portion (recess) and the filling member provided in the frame.
FIG. 92 is a cross-sectional view showing a specific example of the bending inducing portion (convex portion) and the filling member provided on the frame.
FIG. 93 is a cross-sectional view showing a specific example of the bending-inducing portion (plate thickness changing portion) and the filling member provided in the frame.
FIG. 94 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. 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] A sectional view showing a specific example of the frame and the filling member in a 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 top view showing a configuration of a sample used in a cross tension test according to Example 1 and Example 2 according to the fourth embodiment of the present invention.
FIG. 100 is a lateral cross-sectional view showing the configuration of the sample according to Example 1 according to the same embodiment.
FIG. 101 is a lateral cross-sectional view showing the configuration of the sample according to Example 2 according to the same embodiment.
FIG. 102 is a lateral cross-sectional view showing the configuration of the sample according to the comparative example of the embodiment.
FIG. 103 is a graph showing the maximum load of each sample measured by the cross tension test according to the same embodiment.
[Fig. 104] Fig. 104 is a diagram for describing simulation settings of an example regarding an arrangement range of a filling member.
FIG. 105 is a diagram showing a list of cross-sectional views before and after deformation of Examples 1 to 5 and Reference Example 1 regarding an arrangement range of a filling member.
FIG. 106 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. 107 is a diagram showing a list of cross-sectional views before and after deformation of Examples 6 to 10 and Reference Example 2 regarding an arrangement range of a filling member.
FIG. 108 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. 109 is a plan view of the hollow member of the example regarding the total plastic moment changing portion.
FIG. 110 is a graph showing changes in the longitudinal direction of the total plastic moment ratio of the hollow members according to the examples and the reference examples regarding the total plastic moment changing portion.
FIG. 111 is a diagram showing a region in which bending deformation of a hollow member according to a reference example related to an all-plastic-moment changing portion occurs.
FIG. 112 is a diagram showing a region in which bending deformation of the hollow member according to Example 1 relating to the total plastic moment changing portion occurs.
FIG. 113 is a diagram showing a region in which bending deformation of the hollow member according to Example 2 related to the all-plastic-moment changing portion occurs.
FIG. 114 is a diagram showing a region in which bending deformation of the hollow member according to Example 3 relating to the all-plastic-moment changing portion has occurred.
FIG. 115 is a graph showing changes in the longitudinal direction of the total plastic moment ratio and the positions where bending deformation occurs in the hollow members according to the examples and reference examples related to the total plastic moment change portion.
FIG. 116 is a cross-sectional view showing an example of a change in cross-sectional shape of the thinned frame.
FIG. 117 is a cross-sectional view showing another example of changes in the cross-sectional shape of the thinned frame.
FIG. 118 is a partial cross-sectional view showing a structural example of a frame in which a filling member is arranged.
FIG. 119 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
[0031]
　Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the present specification and the drawings, constituent elements having substantially the same functional configuration are designated by the same reference numerals, and a duplicate description will be omitted.
[0032]
　<<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.
[0033]
　FIG. 1 is a schematic configuration diagram of a vehicle 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).
[0034]
　The front structure and the rear structure are also called “crushable zones” and have a function of absorbing and mitigating 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 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.
[0035]
　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 passengers 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.
[0036]
　By the way, in order to maintain both collision safety performance and weight reduction of a vehicle, the structural material (for example, a steel plate) forming the vehicle body structure has been made stronger and thinner. The frames that form the front structure, rear structure, and cabin structure described above are also being replaced with thin high-strength steel plates. 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.
[0037]
　However, if a collision occurs in the longitudinal direction with respect to the thinned frame, if 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.
[0038]
　FIG. 116 is a sectional view showing an example of a change in the sectional shape of the thinned frame 900. As shown in FIG. 116, 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 bulges in the out-of-plane direction, and the side wall portion 900b becomes a surface. It deforms so as to bend outward (cross-sectional shape 901). The bottom wall 900a is on the inside of the bend. As 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.
[0039]
　In addition, FIG. 117 is a cross-sectional view showing another example of changes in the cross-sectional shape of the thinned frame 910. As shown in FIG. 117, 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 bottom of the frame 910 is bent. 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. 116 and 117, the cross section is flattened. Such deformation is called cross-section collapse.
[0040]
　The bending rigidity of the structural material depends on the plate thickness of the structural material. When 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 as shown in FIGS. 116 and 117 is likely to occur. 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. In other words, simply reducing the weight of the vehicle body by using a high-strength steel plate to reduce the weight of the vehicle body may not ensure the expected collision safety performance due to cross-sectional deformation or buckling of the vehicle frame.
[0041]
　By filling the inner space of the frame with the filling member, 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 first made a prototype of a frame in which a bending inducing portion for inducing bending deformation when a load is input is provided and a filling member is arranged in the bending inducing portion. When the filling member is arranged on the frame, the bending rigidity is increased 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, disposing the filling member in the bend inducing portion is an effective arrangement of the filling member. However, the present inventors have discovered that if the filling members are arranged all over the bending inducing portion in the longitudinal direction, the bending inducing portion may not induce bending deformation in some cases. This is because, as a result of the rigidity of the frame in the bending inducing portion being increased by the filling member, bending deformation occurs in a portion other than the bending inducing portion of the frame when a load is input. In this case, the portion other than the bend inducing portion is preferentially deformed out-of-plane, so the effect of suppressing the out-of-plane deformation of the frame by the filling member arranged in the bend inducing portion is significantly diminished.
[0042]
　Therefore, the present inventors have arranged a filling member around the bend inducing portion, and further, the amount of the filling member arranged in at least a part of the region overlapping the bend inducing portion in the longitudinal direction as compared with the periphery of the bend inducing portion. By reducing the (volume), the present invention has conceived a hollow member capable of improving the energy absorption amount at the time of load input with high mass efficiency. Along with the out-of-plane deformation of the bending-induced portion, the peripheral portion of the bending-induced portion is also out-of-plane deformed in the longitudinal direction. Therefore, it is efficient to arrange the filling member in the peripheral portion of the bending-induced portion in the longitudinal direction. It will be arranged. Further, in order not to inhibit the occurrence of bending in the bending inducing portion, the amount of the filling member per length in the longitudinal direction of the region overlapping with the bending inducing portion in the longitudinal direction is suppressed as compared with the periphery of the bending inducing portion. Specifically, it is exemplified as follows. First, the filling member does not have to be arranged in at least a part of the region that overlaps the bending inducing portion in the longitudinal direction. Secondly, at least a part of the region which overlaps with the bending inducing portion in the longitudinal direction may be provided with a portion where the amount of the filling member arranged per length in the longitudinal direction is smaller than that in the periphery of the bending inducing portion. The place where the amount of the filling member to be arranged is small may be either when the region where the filling member is arranged is narrow or when the thickness of the filling member to be arranged is thin. Thirdly, the place where the filling member of the first and second examples is not arranged, or the place where the amount of the filling member arranged is small, extends to all of the bend inducing portion and a part of the periphery of the bend inducing portion. It doesn't matter. However, if the region where the filling member is not arranged is too far from the bending inducing portion, the effect of the filling member will be reduced. It is necessary to arrange a part of the filling member in a region within half of the cross-sectional height of the frame from the end of the bending inducing portion in the longitudinal direction. According to the present invention, bending deformation can be induced at least in the bending inducing portion. Further, as a result of the filling member arranged around the bending inducing portion increasing the rigidity of the frame until the frame is deformed out of plane and buckled, 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 form in which a resin material is arranged in close contact with a second metal plate and adjacent to or apart from a bending inducing portion in the longitudinal direction. The fact that the filling member is arranged adjacent to the bending-inducing portion in the longitudinal direction means that the region where the filling member is not arranged completely overlaps the bending-inducing portion in the longitudinal direction. Disposing the filling member in the longitudinal direction apart from the bend inducing portion means that the region where the filling member is not arranged extends in the longitudinal direction to the outside of the bending inducing portion. In the case where the filling member is arranged in the longitudinal direction so as to overlap the bending inducing portion as in the first example and the second example described above, the filling material is arranged in the peripheral region of the bending inducing portion. The points are the same, so I may omit the explanation. This is the same not only in the first embodiment but also in other embodiments described later.
[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 front side portion of the rear end portion. Further, 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, two-wheeled vehicles, large vehicles such as 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 (5A and 5B). 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 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 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. Further, the ridge line portion 2e is a portion that becomes a boundary 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. Further, 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, 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 shape of 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 including 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. This substantially quadrangle includes a rectangle, a trapezoid, and the like.
[0054]
　Even if the hollow member 10 has a closed cross-section of 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. And it demonstrates as what is formed by the top wall part 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 ordinary size vehicles. 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. The strength of the first structural member 2 and the second structural member 3 according to this 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. If 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. 2. 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. Thereby, the main surface portion 4a is provided so as to bridge between 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 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]
　In addition, a specific arrangement position inside the hollow member 10 of the reinforcement 4 according to the present 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 type, epoxy type, or any other resin. The filling member 5 can be formed at a maximum Young's modulus of about 300 MPa if it is a urethane resin, and at a maximum of 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]
　The 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 the 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 will be described later in detail, but is an example of a bending inducing portion. 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 location where bending deformation is allowed is exemplified by a location where the bent frame 1 does not come into contact with an occupant or an important part even if the frame 1 bends at the location. 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, when 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 condition of the radius of curvature when the 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 of 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 equal to or 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 cross-sectional view in a cross section orthogonal to the Z-axis direction of an example of the frame 1 according to the present embodiment. Note that the cross-sectional view shown in FIG. 5 corresponds to the cross-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. When the collision load F is input to the hollow member 10, the bent portion 6A is bent in the direction of the bottom wall 2a so that the bottom wall 2a is bent inside. When the collision load F is input to the hollow member 10, the bent portion 6B is bent in the direction of the top wall portion 3a so that the top wall portion 3a is bent inside. The bent portions 6A and 6B correspond to the bend inducing portion of the frame 1.
[0070]
　The filling members 5 (5A to 5D) according to this 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 members 5A and 5B are provided in the portion facing the bottom wall portion 2a. Further, the filling members 5C and 5D are provided in the portion facing the ceiling wall portion 3a.
[0071]
　The filling member 5 according to the present embodiment is in close contact with the inner surface of the bottom wall portion 2a or the top wall portion 3a, and is arranged adjacent to or apart from the bent portion 6A or the bent portion 6B in the longitudinal direction. In the example shown in FIG. 5, the filling members 5A and 5B are not arranged in the portion 2x of the bottom wall portion 2a in the bent portion 6A, but are closely attached to the inner surface of the portion of the bottom wall portion 2a which is separated from the bent portion 6A in the longitudinal direction. Are arranged. Further, the filling members 5C and 5D are not arranged in the portion 3x of the top wall portion 3a in the bent portion 6B, but are arranged in close contact with the inner surface of the portion separated from the bent portion 6B in the longitudinal direction of the top wall portion 3a. ..
[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. The arrangement of the filling member 5B is the same as the arrangement of the filling member 5A described with reference to FIG. Further, as shown in FIG. 7, the filling member 5D is disposed 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. .. The filling member 5D 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 5D 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. The arrangement of the filling member 5C is similar to the arrangement of the filling member 5D described with reference to FIG.
[0073]
　The operation and effect of the filling members 5A and 5B will be described with reference to FIGS. 5 and 6. First, the filling members 5A and 5B are arranged in close contact with the main surface portion 4a of the reinforcement 4. Since the filling members 5A and 5B adhere (preferably adhere) to the main surface portion 4a, the resistance to the out-of-plane deformation of the main surface portion 4a increases. As a result, when a collision load is applied to the frame 1 and the bending portion 6A is bent, the out-of-plane deformation of the main surface portion 4a that can occur due to the compressive stress applied to the reinforcement 4 in the Z-axis direction. 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 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. 5 and FIG. 6, the filling members 5A and 5B are not arranged in the portion 2x of the bottom wall portion 2a in the bent portion 6A and are separated from the bent portion 6A in the longitudinal direction of the bottom wall portion 2a. It is placed in close contact (preferably adhesive) with the inner surface. Since the filling members 5A and 5B are not arranged in the portion 2x of the bottom wall 2a in the bent portion 6A, the resistance to the out-of-plane deformation of the portion 2x of the bottom wall 2a in the bent portion 6A remains low. That is, the bending stiffness in the bent portion 6A remains low. Accordingly, when a collision load is input to the frame 1, it is possible to reliably cause bending deformation in the bent portion 6A. On the other hand, the filling members 5A and 5B are arranged in close contact with the inner surface of the portion of the bottom wall portion 2a which is separated from the bent portion 6A in the longitudinal direction, so that the bottom wall in the portion where the filling members 5A and 5B are arranged. The resistance against the out-of-plane deformation of the portion 2a increases. As a result, when a collision load is input to the frame 1 and the bending portion 6A is bent and deformed, the bottom wall portion in the portion where the filling members 5A and 5B are arranged is generated along with the out-of-plane deformation of the bending portion 6A. Out-of-plane deformation of 2a can be suppressed. Therefore, the cross-sectional deformation of the closed cross section of the hollow member 10 is suppressed by the filling members 5A and 5B. Therefore, the collision safety performance of the frame 1 can be further enhanced.
[0075]
　Further, in the example shown in FIGS. 5 and 6, the filling members 5A and 5B connect the main surface portion 4a and the bottom wall portion 2a. Here, the connection means that the filling members 5A and 5B are arranged in close contact with each other across 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 members 5A and 5B, the filling members 5A and 5B cancel out the forces received by the respective deformations of the main surface portion 4a and the bottom wall portion 2a. You can 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 examples shown in FIGS. 5 and 6, the filling members 5A and 5B are arranged in continuous contact with the reinforcement 4 and the side wall portion 2b. That is, the filling members 5A and 5B are arranged in close contact with each other inside 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 plastic deformation locally occurs in the connecting portion 4c. By arranging the filling members 5A and 5B in close contact (preferably bonding) 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 FIGS. 5 and 6, the filling members 5A and 5B are arranged in close contact with the bottom wall portion 2a and the side wall portion 2b continuously. That is, the filling members 5A and 5B are arranged in close contact with each other inside the ridge line portion 2d. Similar to the plastic deformation of the connecting portion 4c described above, when a collision load is applied to the frame 1 and the bending portion 6A is bent, plastic deformation locally occurs at the ridge portion 2d. Therefore, by placing the filling members 5A and 5B in close contact (preferably bonding) at such positions, it is possible to suppress local plastic deformation that occurs in the ridge 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 members 5A and 5B are arranged in close contact with all the insides of the ridge line portion 2d and the connecting portion 4c. Not limited to this, if the filling members 5A and 5B are arranged inside at least one of the ridge portion 2d and the connecting portion 4c, the collision safety performance is improved.
[0079]
　Here, as the Young's modulus of the filling member 5 is higher, the effect of suppressing the plastic deformation described above by the filling member 5 is higher. 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 cross-sectional deformation should be suppressed can be limited to the portion adjacent to or separated from the bent portion 6. 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 the present embodiment, it is possible to reduce the weight increase due to the higher Young's modulus of the filling member 5. As described above, in the present 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 members 5A and 5B have been described above. In the above description, the case where the filling members 5A and 5B are arranged separately from the bent portion 6A in the longitudinal direction has been described, but the filling members 5A and 5B are arranged adjacent to the bent portion 6A in the longitudinal direction. However, the above-described actions and effects are similarly exhibited. Further, the above-described actions and effects are similarly exerted on the filling members 5C and 5D filled between the top wall portion 3a and the main surface portion 4a as shown in FIGS. 5 and 7.
[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, since the cross-sectional shape of the hollow member 10 is maintained by the reinforcement 4, 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 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 2a and the top wall 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. Moreover, 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]
　In addition, in the frame 1 according to the present embodiment, the filling member 5 is in close contact with the hollow member 10 and is arranged around the bending portion 6 which is the bending inducing portion, and further, the filling member 5 is not arranged in the bending portion 6. , Or there is a region in which the amount of filling member arranged per length in the longitudinal direction is small. With this configuration, the bending stiffness of the bent portion 6 can be kept low. Accordingly, when a collision load is input to the frame 1, it is possible to surely cause bending deformation in the bent portion 6. On the other hand, with such a configuration, in the portion where the filling member 5 is arranged, which is caused by the out-of-plane deformation of the bent portion 6 when the collision load on the frame 1 is input and the bent portion 6 is bent and deformed. Out-of-plane deformation of the hollow member 10 can be suppressed. Therefore, the cross-sectional deformation of the closed cross section of the hollow member 10 is suppressed by the filling member 5. Therefore, the collision safety performance of the frame 1 can be further enhanced.
[0084]
　<2.2. Arrangement Example of Filling Member>
　The arrangement of the filling member 5 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.
[0085]
　(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.
[0086]
　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 cross-sectional view shown in FIG. 8 corresponds to the cross section of the frame 1 taken along the line II-II of the frame 1 shown in FIG.
[0087]
　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 4 a, 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 the required collision safety performance can be ensured, the filling member 510 may be arranged only on a part of the main surface portion 4a as shown in FIG. 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.
[0088]
　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 arranged in close contact with the reinforcement 4, the arrangement surface of the filling member 510 on the main surface portion 4a is not particularly limited.
[0089]
　(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 via 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 connected to the reinforcement 4 can also be suppressed. As a result, the cross-sectional deformation of the hollow member 10 can be suppressed.
[0090]
　FIG. 9 is a cross-sectional view of the frame 1 for explaining a second arrangement example of the filling member according to this 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.
[0091]
　As shown in FIG. 9, the filling member 511 is arranged in close contact (preferably adhesion) with each part so as to connect the central part of the main surface part 4a and the central part of the bottom wall part 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 the required collision safety performance can be ensured, 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.
[0092]
　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 ceiling wall portion 3a to connect the main surface portion 4a and the ceiling 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 arranged in close contact with the reinforcement 4, the portion to be connected by the filling member 511 is not particularly limited.
[0093]
　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. As a result, 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.
[0094]
　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. Further, 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.
[0095]
　(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.
[0096]
　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.
[0097]
　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 closely contact (preferably adhere) to the side wall portion 2b. Further, the filling member 512 has a cavity 512a inside. Thereby, 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 as long as it is placed in close contact with the reinforcement 4 and whether it is in close contact with other wall portions and the filling amount.
[0098]
　<<3. Second Embodiment>> In
　the second embodiment, a resin material is adhered to the inner surface of at least one of the bottom wall and the top wall of the metal member, and is adjacent to or separated from the bending inducing portion in the longitudinal direction. It is a form to be arranged.
[0099]
　<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 to 5D). 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.
[0100]
　(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 sectional view shown in FIG. 12 corresponds to the sectional view of the hollow member 10 taken along the line IV-IV shown in FIG. 11. As shown in FIG. 12, the hollow member 10 is provided with bent portions 6A and 6B. When the collision load F is input to the hollow member 10, the bent portion 6A bends in a direction in which the bottom wall portion 2a is bent inside. When the collision load F is input to the hollow member 10, the bent portion 6B bends in the direction in which the top wall portion 3a is bent inside. These bent portions 6 correspond to bending inducing portions in the frame 1.
[0101]
　The filling member 5 according to the present embodiment is in close contact with the inner surface of the bottom wall portion 2a or the top wall portion 3a, and is arranged adjacent to or apart from the bent portion 6A or the bent portion 6B in the longitudinal direction. In the example shown in FIG. 11 and FIG. 12, the filling members 5A and 5B are not arranged in the portion 2x of the bottom wall 2a where the bent portion 6A is provided, but are arranged apart from the bent portion 6A in the longitudinal direction. .. On the other hand, as shown in FIGS. 11 and 12, the filling members 5C and 5D are not arranged in the portion 3x of the top wall portion 3a where the bent portion 6B is provided, but are arranged in the longitudinal direction apart from the bent portion 6B. To be done.
[0102]
　FIG. 13 is a cross-sectional view taken along the line VV of the frame 1 shown in FIG. Further, FIG. 14 is a 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. 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. The arrangement of the filling member 5B is the same as the arrangement of the filling member 5A described with reference to FIG. Further, as shown in FIG. 14, the filling member 5D is arranged in close contact with the inner surface of the top wall portion 3a. The arrangement of the filling member 5C is similar to the arrangement of the filling member 5D described with reference to FIG.
[0103]
　The action and effect of the filling members 5A and 5B will be described with reference to FIGS. 12 and 13. Referring to FIGS. 12 and 13, the filling members 5A and 5B are not arranged in the portion 2x of the bottom wall portion 2a in the bent portion 6A, but on the inner surface of the portion that is separated from the bent portion 6A in the longitudinal direction of the bottom wall portion 2a. They are arranged in close contact (preferably adhesion). Since the filling members 5A and 5B are not arranged in the portion 2x of the bottom wall 2a in the bent portion 6A, the resistance to the out-of-plane deformation of the portion 2x of the bottom wall 2a in the bent portion 6A remains low. That is, the bending stiffness in the bent portion 6A remains low. Accordingly, when a collision load is input to the frame 1, it is possible to reliably cause bending deformation in the bent portion 6A.
[0104]
　On the other hand, the filling members 5A and 5B are arranged in close contact with the inner surface of the central portion of the portion of the bottom wall 2a which is separated from the bent portion 6A in the longitudinal direction. 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 bending portion in the longitudinal direction of the bottom wall portion 2a, which is generated along with the deformation of the bending portion 6A. The deformation of the central portion in the Z-axis direction of the portion separated from 6A is restrained by the filling members 5A and 5B. Thereby, the out-of-plane deformation of the bottom wall portion 2a can be suppressed. That is, when a 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 members 5A and 5B are 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.
[0105]
　The wall thickness a of the filling members 5A and 5B in the X-axis direction is not particularly limited, and the wall thickness a is appropriately set according to the load bearing performance and weight required for the frame 1. In order to control the wall thickness a of the filling members 5A and 5B, 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 positions of the filling members 5A and 5B are not particularly limited. However, by disposing the filling members 5A and 5B 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. Furthermore, the width of the filling members 5A and 5B 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, the distances b 1 and b 2 are preferably the same value. Further, the sizes of the distances b 1 and b 2 are determined according to the wall thickness in the X-axis direction of the filling members 5A and 5B that are appropriately set according to the load bearing performance and weight required for the frame 1.
[0106]
　As shown in FIGS. 12 and 14, the filling members 5C and 5D are arranged on the top wall portion 3a. Filling members 5C and 5D are the same as filling members 5A and 5B described with reference to FIGS. 12 and 13 except that they are arranged on top wall portion 3a. However, the width of the filling members 5C and 5D on the ceiling wall portion 3a is preferably 20% or more of the width of the ceiling wall portion 3a in the closed cross section. It is more desirable if it is 30% or more.
[0107]
　In the present invention, the term “close contact” means that they are arranged in contact with each other without a gap. Of the close contact, the adhesion that restrains 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. 116 and 117 occurs in the frame 1 according to this 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 plane of the inner surface. Follow the transformation. 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 restraining each other, 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. ..
[0108]
　Here, as the Young's modulus of the filling member 5 is higher, the effect of suppressing the plastic deformation described above by the filling member 5 is higher. 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 cross-sectional deformation should be suppressed can be limited to the portion adjacent to or separated from the bent portion 6. 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 the present embodiment, it is possible to reduce the weight increase due to the higher Young's modulus of the filling member 5. As described above, in the present embodiment, it is possible to improve the collision safety performance with high mass efficiency.
[0109]
　The arrangement of the filling members 5A and 5B, and the operation and effect of the arrangement have been described above. In the above description, the case where the filling members 5A and 5B are arranged separately from the bent portion 6A in the longitudinal direction has been described, but the filling members 5A and 5B are arranged adjacent to the bent portion 6A in the longitudinal direction. Also, even when the ends of the filling members 5A and 5B are arranged so as to overlap the bent portion 6A, a part of the range where the filling members 5A and 5B are connected and overlaps the bent portion 6A is provided around the bent portion 6A. Even when the amount of the filling member 5 per length in the longitudinal direction to be arranged is small, the above-described actions and effects are similarly exhibited. Further, the above-described actions and effects are similarly exerted by the filling members 5C and 5D arranged adjacent to or apart from the bent portion 6B as shown in FIGS. 12 and 14.
[0110]
　Thus, in the frame 1 according to the present embodiment, the filling member 5 is in close contact with the inner surface of the bottom wall portion 2a or the top wall portion 3a, and is arranged around the bending portion 6 that is the bending inducing portion. A region where the filling member 5 is not arranged in the bent portion 6 or a region where the amount of the filling member 5 per length in the longitudinal direction arranged in a part of the range overlapping with the bent portion 6 is smaller than that of the periphery of the bent portion 6 is is there. With this configuration, the bending stiffness of the bent portion 6 can be kept low. Thereby, when a collision load is input to the frame 1, it is possible to surely cause bending deformation in the bent portion 6. On the other hand, with such a configuration, when a collision load is input to the frame 1 and bending deformation occurs in the bending portion 6, the bottom in the portion where the filling member 5 is disposed, which is caused by the out-of-plane deformation of the bending portion 6. Out-of-plane deformation of the wall portion 2a or the top wall portion 3a can be suppressed. Thereby, the cross-sectional collapse of the frame 1 due to a collision 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 arranging the filling member 5 having a low mass density in the above-mentioned portion. Therefore, the load bearing performance of the frame 1 can be maintained high. Therefore, the collision safety performance of the frame 1 can be further enhanced.
[0111]
　<3.2. Arrangement Example of Filling Member>
　The arrangement of the filling member 5 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.
[0112]
　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 2d or the ridge 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.

The scope of the claims
[Claim 1]
　A hollow metal member having a bend-inducing portion in a part of the longitudinal direction, and a
　metal member that is in close contact with each other and is arranged on both sides of the bend-inducing portion in the longitudinal direction, and an end portion of the bend-inducing portion in the longitudinal direction. , a resin material disposed on at least a portion of less than 5 in the range of 6 minutes sectional height of the metal member outwardly from
comprising a
　quantity of said resin material per unit length of the longitudinal direction, A hollow member in which the outside of the bend inducing portion is larger than the inside of the bend inducing portion.
[Claim 2]
　In the longitudinal direction, the end of the resin material closer to the bend inducing portion overlaps with the bend inducing portion, or a cross section of the metal member from the end of the bend inducing portion to the outside of the bend inducing portion. The hollow member according to claim 1, wherein the hollow member is arranged in a range of 1 to 2 in height.
[Claim 3]
　The distance in the longitudinal direction from the end of the resin material farther from the bending inducing portion in the longitudinal direction to the end of the bending inducing portion is 5/6 or less of the sectional height of the metal member. The hollow member according to claim 1 or 2.
[Claim 4]
　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 any one of claims 1 to 3, wherein the top wall portion forms a closed cross section.
[Claim 5]
　The hollow member according to claim 4, wherein the resin material is disposed in close contact with an inner surface of at least one of the bottom wall portion and the top wall portion.
[Claim 6]
　The hollow member according to claim 4 or 5, wherein the resin material is disposed in close contact with an inner surface of at least one of the pair of side wall portions.
[Claim 7]
　The hollow member according to any one of claims 1 to 6, 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.
[Claim 8]
　The hollow member according to claim 7, wherein the resin material is disposed in close contact with the second metal plate.
[Claim 9]
　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 to form both the outer surface and the inner surface of the first metal plate. The hollow member according to any one of claims 1 to 8, which is arranged in close contact with the hollow member.
[Claim 10]
　The hollow member according to claim 9, wherein the hole edge of the hole is located inside the metal member with respect to the first metal plate forming the metal member.
[Claim 11]
　The hollow member according to claim 10, 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.
[Claim 12]
　The hole is provided with a recessed portion that is recessed inward of the metal member than the first metal plate forming the metal member, and the
　hole is provided inside the recessed portion. The hollow member according to any one of 9 to 11.
[Claim 13]
　The hollow member according to any one of claims 1 to 12, wherein the bending inducing portion is a portion where a total plastic moment of the metal member changes in the longitudinal direction.
[Claim 14]
　14. 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 a center of gravity of a cross section of the metal member is 260 mm or less. The hollow member described.
[Claim 15]
　The hollow member according to any one of claims 1 to 13, wherein the bending inducing portion is a plate thickness changing portion.
[Claim 16]
　The hollow member according to any one of claims 1 to 13, wherein the bending inducing portion is a portion provided with a recess.
[Claim 17]
　The hollow member according to any one of claims 1 to 13, wherein the bending inducing portion is a portion provided with a convex portion.
[Claim 18]
　The hollow member according to any one of claims 1 to 13, wherein the bending inducing portion is a portion provided with a hole.
[Claim 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.