Technical field
[0001]
　The present invention, steel sheet members combined structure, automobile structural member, center pillar, bumper, and a door beam.
　This application claims priority based on Japanese Patent Application No. 2015-163063, filed in Japan on August 20, 2015, which is incorporated herein by reference.
Background technique
[0002]
　Structural members constituting the car body, when an automobile collides with an oncoming vehicle or an obstacle or the like when the vehicle is struck from the side of the vehicle body to have a role in suppressing the influence on the cabin by collision. For example, as shown in FIGS. 17A and 17B, the center pillar 1 which is one of the structural members constituting the car body receives the load impact body 5 from the side of the vehicle in its lower part collide, the center pillar 1 the lower is deformed to fall down inward in the width direction of the vehicle body. By this modification, the center pillar 1 is to absorb the impact energy by the impact body 5, the upper center pillar 1 to secure the occupant P safe to prevent the entering the cabin.
[0003]
　However, before receiving a load from the impact body 5 sufficiently, if the breakage occurs in the center pillar 1 can not sufficiently absorb the impact energy by the impact body 5, as a result, as shown in FIG. 17A the upper part of the center pillar 1 is able to enter the cabin. To to prevent breakage of the center pillar 1 increasing energy absorption amount is considered to increase the thickness of the center pillar 1, the increase in thickness leads to an increase in vehicle weight. Therefore, to improve the energy absorbing efficiency when there is a collision (energy absorption volume per unit weight) has become important.
[0004]
　Here, Patent Document 1, by the inside of the center pillar provided foam, increasing the initial resistance in the event of an impact against the side of the vehicle body, the deformation of the center pillar by collision is prevented from traveling in the cabin, technology for improving the safety of the passengers in the cabin is disclosed.
[0005]
　Moreover, progress in Patent Documents 2 and 3, by forming the fragile portion of the holes or concave bead and the like in the lower part of the center pillar, to induce deformation due mainly collides with the lower side portion of the vehicle body, deformation in the cabin from being suppressed, a technique for improving the safety of the passengers in the cabin is disclosed.
CITATION
Patent Literature
[0006]
Patent Document 1: Japanese Patent 2007-308114 JP
Patent Document 2: Japanese Japanese Patent No. 3173539
Patent Document 3: Japanese Patent 2010-095176 JP
Summary of the Invention
Problems that the Invention is to Solve
[0007]
　However, in Patent Document 1, the raw materials and manufacturing process to increase manufacturing cost in terms of complexity, energy absorption by the foam material is not sufficient. As a result, in order to improve the energy absorption efficiency in Patent Document 1, it requires a large amount of foam, increase in manufacturing costs is remarkable.
[0008]
　In Patent Document 2 and Patent Document 3, the fragile portion such as a hole is likely to break during a collision, deformation is likely to concentrate on local deformation occurs in the fragile portion. Therefore, in Patent Documents 2 and 3, capable of absorbing energy is reduced, as a result, it is difficult to improve the energy absorbing efficiency.
[0009]
　The present invention has been made in view of the above circumstances, to provide steel members combined structure capable of improving the impact energy absorbing efficiency at low cost, automobile structural members, the center pillar, bumpers, and the door beam With the goal.
Means for Solving the Problems
[0010]
　In order to solve the above problems, the present invention employs the following.
　(1) steel plate member combined structure according to the first aspect of the present invention includes a main wall portion, and a rising wall portion rises from the edge of the main wall portion, from the edge of the rising wall portion, said main wall portion the first steel sheet member and having a flange portion extending parallel to, while being bonded to at least one of the inner or outer surface of said first steel plate member, said main wall part in contact with the horizontal wall portion, and the rising a second steel sheet member having a contact with the vertical wall portion in the wall portion; with a distance between the outer surface and the outer surface of the main wall portion of the flange portion, and the outer surface and the outer surface of the lateral wall portion of the flange portion and among distances, either greater distance as H (mm), the thickness of the rising wall portion, and the sum of the thickness of the vertical wall portion and t (mm), the distal end surface of the vertical wall portion the lateral wall and the distance between the outer surface of the main wall portion, and said distal end surface of the vertical wall portion Of the distance between said outer surface, when either greater distance is defined as H1 (mm), the first steel plate member and the second steel member, the following equation (a) and Formula (b) to satisfy.
　(H / t) ≦ 20.0 ··· formula
　(a) 0.6 ≦ (H1 / H) ≦ 1.0 · · · formula
　(b) In the aspect described in (2) above (1), wherein and the rising wall portion of the first steel plate member, may further include a first bonding portion for bonding the vertical wall portion of the second steel member.
　(3) In the aspect described in the above (1) or (2), and said main wall portion of the first steel sheet member, a second bonding portion for bonding the lateral wall portion of said second steel plate member it may be provided further.
　(4) In the aspect described in any one of the above (1) to (3), the second steel member may be a tensile strength of 980MPa or higher class of the steel sheet.
　(5) In the aspect described in the above (4), the first steel plate member may be a tensile strength of 980MPa or higher class of the steel sheet.
　(6) automotive structural members according to the second aspect of the present invention comprises a steel plate member combined structure according to any one of the above (1) to (5).
　(7) a center pillar according to the third aspect of the present invention, there is provided a center pillar with a steel plate member combined structure according to any one of the above (1) to (5), the center pillar inner and; the is composed from the first steel member of the steel plate member combined structure, the center pillar outer that are joined to the center pillar inner, composed from the second-parts of the steel plate member combined structure, the inner surface of the center pillar outer or a patch member bonded to at least one of the outer surface; comprises.
　(8) bumper according to the fourth aspect of the present invention, the above (1) to (5) a bumper having a steel plate member combined structure according to any one of the base plate and, said steel plate member combined structure consists of the first steel plate member, said bumper body joined to the base plate; constructed from the second-parts of the steel plate member combined structure is bonded to at least one of the inner or outer surface of the bumper body and a patch member; comprises.
　(9) door beam according to a fifth aspect of the present invention is a door beam which has a steel plate member combined structure according to any one of the above (1) to (5), the first of said steel plate member combined structure a door beam body is composed of one steel plate member; comprises; consists the second steel sheet member of the steel plate member combined structure, a patch member bonded to at least one of the inner or outer surface of the door beam body.
Effect of the invention
[0011]
　According to the above aspect of the present invention, it is possible to improve the impact energy absorbing efficiency at low cost.
BRIEF DESCRIPTION OF THE DRAWINGS
[0012]
Is a schematic perspective view showing a center pillar according to the first embodiment of FIG. 1A] present invention.
[Figure 1B] is an exploded perspective view of the center pillar, (a) is a diagram showing a center pillar inner of the center pillar, showing a state in which (b) is joined to the center pillar outer to the center pillar inner a diagram illustrates a patch member (c) is joined to the center pillar outer.
It is an A-A sectional view of FIG. 2 FIG. 1A.
[Figure 3] a A-A sectional view of FIG. 1A, a diagram showing an example of deformation when a load is applied to the center pillar.
Is a cross-sectional view showing an example of deformation when a load is applied to the center pillar does not satisfy [Fig 4A] Equation (1).
Is a cross-sectional view showing an example of deformation when a load is applied to the center pillar does not satisfy [Fig 4B] Equation (2).
[5] a A-A sectional view of FIG. 1A, a diagram showing a modification of the center pillar according to a first embodiment of the present invention.
[6] a A-A sectional view of FIG. 1A, a diagram showing a center pillar according to a second embodiment of the present invention.
[7] a A-A sectional view of FIG. 1A, a diagram showing a modification of the center pillar.
8 is a schematic perspective view of a bumper according to a third embodiment of the present invention.
It is a B-B sectional view of FIG. 9 Fig.
[Figure 10] A sectional view taken on line B-B in FIG. 8 is a diagram showing a modification of the bumper.
[Figure 11] A sectional view taken on line B-B in FIG. 8 is a diagram showing a bumper according to a fourth embodiment of the present invention.
[Figure 12] A sectional view taken on line B-B in FIG. 8 is a diagram showing a modification of the bumper.
13 is a schematic perspective view of a door beam according to a fifth embodiment of the present invention.
It is a C-C sectional view of FIG. 14 FIG. 13.
A sectional view taken along line C-C of FIG. 15 FIG. 13 is a diagram showing a modification of the door beam.
Is a graph showing the relationship between FIG. 16A] H / t and energy absorption efficiency.
It is a graph showing the relationship between [FIG 16B] H1 / H and energy absorption efficiency.
A diagram illustrating a FIG. 17A] conventional center pillar is a cross-sectional view when viewed in cross section perpendicular to the longitudinal direction of the vehicle body.
It is a D-D sectional view of FIG 17B] FIG 17A.
DESCRIPTION OF THE INVENTION
[0013]
　Hereinafter, with reference to the drawings will be described in detail the embodiments of the present invention. In the specification and the drawings, components having substantially the same function and structure are a repeated explanation thereof by referring to the figures.
[0014]
(First Embodiment)
　FIG 1A is a schematic perspective view of a center pillar 100 according to the first embodiment of the present invention (automobile structural member). Further, FIG. 1B is an exploded perspective view of the center pillar 100 is a view showing a center pillar inner 110 (a), showing a state in which bonding the center pillar outer 120 to the center pillar inner 110 (b) a diagram illustrates a patch member 130 (c) is joined to the center pillar outer 120. Also, FIG. 2 is an A-A sectional view of FIG. 1A.
[0015]
　As shown in FIGS. 1A and 1B, the center pillar 100, and long in one direction, a center pillar inner 110, and the center pillar inner 110 center pillar outer 120 which is joined to the (first steel member), this patch member 130 which is joined to the center pillar outer 120 and a (second-parts). Then, the center pillar 100 is on the side of the automobile body, is arranged along the vertical direction.
　Further, as shown in FIG. 2, the center pillar 100 is a vertical cross-section hollow section in the longitudinal direction, when there is a collision F from the vehicle body side, bending deformation under load due to a collision F, It is adapted to absorb the collision energy.
[0016]
　Center pillar inner panel 110 of the center pillar 100, as shown in FIG. 2, has a flat plate shape. The center pillar inner panel 110 is, for example, a plate thickness of 0.6 ~ 1.6 mm, the tensile strength is 980MPa or higher grade steel sheets.
　Note that the center pillar inner panel 110, and more preferably a tensile strength of used 1180MPa or higher class of the steel sheet.
[0017]
　Center pillar outer 120 of the center pillar 100, plate thickness is 0.8 ~ 2.0 mm, the tensile strength is 980MPa or higher grade steel sheets. The center pillar outer 120, as shown in FIG. 2 is a cross-sectional hat shape perpendicular to the longitudinal direction, and the main wall portion 121 which faces the center pillar inner panel 110, both ends 121a (both ends of the main wall portion 121 from the edge) and a pair of rising wall portion 122 rises vertically and parallel to the main wall 121 so as to be separated from the main wall portion 121, a pair of extending from one end 122a of the rising wall portion 122 (end edge) flange portion 123 It is equipped with a door.
　Note that the center pillar outer 120, and more preferably a tensile strength of used 1180MPa or higher class of the steel sheet.
[0018]
　Further, the center pillar outer 120, as shown in FIG. 2, the outer surface 110a of the center pillar inner panel 110 (the vehicle body outer surface), the flange portion 123 are joined by spot welding. In other words, between the inner surface 123a of the flange portion 123 of the outer surface 110a and the center pillar outer 120 of the center pillar inner panel 110, the spot weld 150 is provided. Instead of spot welding, for example, by laser welding or brazing or the like, it may be bonded to the flange portion 123 of the center pillar inner panel 110 and the center pillar outer 120.
[0019]
　Patch member 130 of the center pillar 100, plate thickness of 0.8 ~ 3.0 mm, tensile strength of steel plates of more than 980 MPa. Then, the patch member 130, as shown in FIG. 2 is a cross-sectional shape of the channel-shaped, includes a horizontal wall portion 131, and a pair of vertical wall portions 132 rises vertically from both ends 131a of the horizontal wall portion 131 (opposite edges) ing.
　Also, the patch member 130, and a rising wall portion 122 of the vertical wall portion 132 and the center pillar outer 120 as well as spot welding, and a main wall portion 121 of the lateral wall portion 131 and the center pillar outer 120 by spot welding, Center It is joined to the outer surface of the pillar outer 120. In other words, with the spot welds 160 (first junction) is formed between the inner surface 132a of the vertical wall portion 132 of the outer surface 122b and the patch member 130 of the rising wall portion 122 of the center pillar outer 120, Center spot weld 170 (second junction) is formed between the inner surface 131b of the lateral wall portion 131 of the outer surface 121b and the patch member 130 of the main wall portion 121 of the pillar outer 120. Instead of spot welding, for example, by laser welding or brazing or the like, it may be joined to the center pillar outer 120 and the patch member 130.
[0020]
　The patch member 130, it is possible to use various steel such as hot stamp material. In addition, the patch member 130, it is more preferable that the tensile strength is used 1180MPa or higher class of the steel sheet, it is further preferred that the tensile strength using the above steel plate 1500 MPa.
[0021]
　Lateral wall 131 of the patch member 130 has a shape along the shape of the main wall 121 of the center pillar outer 120. Further, the vertical wall portion 132 of the patch member 130 has a shape along the shape of the rising wall portion 122 of the center pillar outer 120. That is, in the center pillar 100, lateral wall 131 of the patch member 130 abuts against the main wall 121 of the center pillar outer 120, vertical wall 132 of the patch member 130 is in contact with the rising wall portion 122 of the center pillar outer 120 there.
[0022]
　As described above, in the center pillar 100, since joining the patch member 130 to the center pillar outer 120 can reinforce the center pillar outer 120. Further, since the joining patch member 130 to the center pillar outer 120, it can be reinforced only necessary portions. Therefore, as compared with the case of increasing the thickness of the entire center pillar outer 120, it is possible to reduce the weight gain.
[0023]
　Spot weld 160, as shown in FIG. 2, from the side end face 132b of the vertical wall portion 132 of the patch member 130 (distal end surface) in the range of L1 (mm), that at least part of which is formed preferable. Here, L1 represents 40% of the height of the vertical wall portion 132 of the patch member 130 (the distance from the side end surface 132b of the vertical wall portion 132 to an outer surface 131c of the lateral wall portion 131). That is, for example, when the height of the vertical wall portion 132 of the patch member 130 is 60mm, the in the range of the side end surface 132b of the vertical wall portion 132 of the patch member 130 of L1 = 24 mm, the spot welds 160 at least a it is preferred that part is formed.
　Spot weld 170, in the range from the inner surface 132a of the vertical wall portion 132 of the L2 (mm), it is preferable that at least a part thereof is formed. Here, L2, similarly to the L1, representing 40% of the height of the vertical wall portion 132 of the patch member 130 (the distance from the side end surface 132b of the vertical wall portion 132 to an outer surface 131c of the lateral wall portion 131). In the case where R portion is provided between the main wall 121 and a rising wall portion 122, in the range of R blind of L2, that at least a portion of the spot weld 170 is formed preferable.
[0024]
　Next, a description will be given of each parameter of the center pillar 100. In the center pillar 100, a center pillar outer 120 and the patch member 130, to satisfy both the following equations (1) and (2).
　(H / t) ≦ 20.0 ··· Equation
　(1) 0.6 ≦ (H1 / H) ≦ 1.0 · · · formula (2)
[0025]
　Here, as shown in FIG. 2, H (mm), the distance between the outer surface 121b of the outer surface 123b and the main wall portion 121 of the flange portion 123, and the outer surface 131c of the outer surface 123b and the lateral wall portion 131 of the flange portion 123 of the distance, and it represents one of the larger distance. That is, in the center pillar 100, since the patch member 130 is joined to the outer surface of the center pillar outer 120, the above H is the outer surface of the lateral wall portion 131 of the patch member 130 from the outer surface 123b of the flange portion 123 of the center pillar outer 120 it represents the distance to 131c (height).
　Furthermore, t (mm) represents the thickness of the rising wall portion 122 of the center pillar outer 120, and the sum of the thickness of the vertical wall portion 132 of the patch member 130.
　Further, H1 (mm), the distance between the outer surface 121b of the side end surface 132b and the main wall portion 121 of the vertical wall portion 132, and of the distance between the outer surface 131c of the side end surface 132b and the lateral wall portion 131 of the vertical wall portion 132, it represents any greater distance (height). That is, in the center pillar 100, since the patch member 130 is joined to the outer surface of the center pillar outer 120, H1 described above, the distance from the side end face 132b of the vertical wall portion 132 to an outer surface 131c of the lateral wall portion 131 (height ) to represent.
[0026]
　In the center pillar 100, as described above, by patch member 130 to the center pillar outer 120 is joined, the center pillar outer 120 is reinforced, satisfying both of the above formulas (1) and (2) Accordingly, it is possible to improve the energy absorbing efficiency when there is a collision F. The reason for defining the above equation (1) and (2) are as follows.
[0027]
　If not satisfied equation (1) ((H / t)> 20.0): will be rising wall portion 122 is easily buckled and deformed in the center pillar outer 120, rising wall before receiving the load caused by collision sufficiently part 122 is fear that broken. In this case, the load after fracture, so that the responsible by the lateral wall portion 131 of the main wall 121 and the patch member 130 of the center pillar inner panel 110 and the center pillar outer 120. Then, when viewed along the center pillar 100 in the longitudinal direction, the center pillar 100 deforms in a wide range including a position distant from the collision point, there is a possibility that leading to the cabin.
[0028]
　Expression is not satisfied the lower limit of (2) (0.6> (H1 / H)): rising wall portion 122 of the center pillar outer 120 is sufficiently obtained the reinforcing effect of the vertical wall portion 132 of the patch member 130 no reason, there is a possibility that the rising wall portion 122 ends up easily buckled and deformed, the rising wall portion 122 before receiving the load caused by collision sufficiently become broken. In this case, it will have under a load after fracture in the lateral wall portion 131 of the main wall 121 and the patch member 130 of the center pillar inner panel 110 and the center pillar outer 120. Then, when viewed along the center pillar 100 in the longitudinal direction, the center pillar 100 deforms in a wide range including a position distant from the collision point, there is a possibility that leading to the cabin.
[0029]
　If not satisfied the upper limit of Formula (2) ((H1 / H)> 1.0): Because impossible dimensionally, it is impossible to bond the patch member 130 to the center pillar outer 120. Therefore, it is impossible to obtain the effect of reinforcing the patch member 130, will be deformed buckling easily be rising wall portion 122, there is a possibility that the rising wall portion 122 will be broken before the fully receive the load caused by collision .
[0030]
　If satisfy both equations (1) and (2): in the range of the present invention, due to the collision, it is possible to prevent breakage of the rising wall portion 122 of the center pillar outer 120. Then, the collision energy can be reliably absorbed by the deformation behavior of the vertical wall portion 132 of the rising wall portion 122 and a patch member 130, the center pillar outer 120.
　Regarding the above equation (1), the value of H / t, from the viewpoint of fracture preventing effect, preferably as small. For example, H / t is preferably 17.5 or less, more preferably 15.0 or less, still more preferably 12.5 or less. On the other hand, the lower limit of H / t is not limited in particular, H / t, for example, 5.0 or more.
　With regard to the above equation (2), H1 / H, from the viewpoint of fracture preventing effect, preferably at least 0.7, further preferably 0.8 or more.
[0031]
　Here, the center pillar 100 when satisfying both of the above formulas (1) and (2), FIG. 3 shows an example of deformation when there is a collision F. In Figure 3, since the center pillar 100 meets both of the above formulas (1) and (2), the rising wall portion 122 of the center pillar outer 120 is sufficiently reinforced by the patch member 130, the rising wall portion 122 it can be prevented from being easily buckled and deformed.
　On the other hand, the center pillar 50 which does not satisfy the equation (1) above, an example of a variant in the case where a collision F in Figure 4A. In Figure 4A, since the center pillar 50 does not satisfy the equation (1) above, can not be sufficiently reinforced rising wall portion 122 of the center pillar outer 120 by the patch member 130, facilitate the rising wall portion 122 buckling deformation.
　Further, the center pillar 60 which does not satisfy the above equation (2) shows an example of a variant in the case where a collision F in Figure 4B. In Figure 4B, since the center pillar 60 does not satisfy the equation (2) above, it is impossible to obtain a reinforcing effect of the patch member 130 sufficiently, the rising wall portion 122 is easily buckled and deformed.
[0032]
　As described above, according to the center pillar 100 of the present embodiment, since joining the patch member 130 to the center pillar outer 120, without increasing the thickness of the entire center pillar outer 120, parts necessary only it can be reinforced. Therefore, while suppressing the increase in weight of the center pillar 100, it is possible to reinforce the center pillar outer 120. Further, the center pillar outer 120 and the patch member 130 is to satisfy both of the above formulas (1) and (2), when there is a conflict from the side of the vehicle, the center pillar outer 120 of the rising wall portion 122 it is possible to prevent the break. Therefore, it is possible to improve the impact energy absorbing efficiency at low cost.
[0033]
　In the center pillar 100, as shown in FIG. 2, between the outer surface 123b of the flange portion 123 of the side end surface 132b and the center pillar outer 120 of the vertical wall portion 132 of the patch member 130, a predetermined distance D (mm) it is preferable to provide the (D> 0). In other words, with reference to the above formula (2), H1 / H is preferably less than 1.0 ((H1 / H) < 1.0). In this case, since the gap is formed between the outer surface 123b of the flange portion 123 of the side end surface 132b and the center pillar outer 120 of the vertical wall portion 132 of the patch member 130, when the patch member 130 by colliding F deforms, patch member side end surface 132b of 130 can be prevented to be bound to the flange portion 123 of the center pillar outer 120. Therefore, the deformation of the rising wall portion 122 of the center pillar outer 120, a vertical wall portion 132 of the patch member 130 can be reliably follow, as a result, it is possible to prevent peeling of the spot weld 160.
　The distance D above, for example, it is more preferably 10% or more of H. That is, for the above equation (2), H1 / H is more preferably 0.9 or less.
[0034]
[Modification of First Embodiment]
　In the present embodiment, showing a case where the channel-shaped patch member 130 is joined to the center pillar outer 120. However, as shown in FIG. 5, it may be joined to a pair of patch member 140 having a L-shaped cross section in the center pillar outer 120. In this case, contact the main wall 121 of the center pillar outer 120, the volume of the lateral wall portion 131 of the patch member 140 is reduced, it is possible to reduce the weight of the center pillar 100.
[0035]
(Second Embodiment)
　Next, a description will center pillar 200 of the second embodiment of the present invention.
[0036]
　Figure 6 is a transverse sectional view showing a center pillar 200 of the present embodiment. In the center pillar 100 according to the first embodiment described above, it shows a case where the patch member 130 is joined to the outer surface of the center pillar outer 120. In contrast, as shown in FIG. 6, the center pillar 200 of the present embodiment, the patch member 130 is joined to the inner surface of the center pillar outer 120.
[0037]
　As shown in FIG. 6, the center pillar 200, together with the lateral wall portion 131 of the patch member 130 is joined to the inner surface 121c of the main wall 121 of the center pillar outer 120 by spot welds 170, vertical wall of the patch member 130 part 132 is joined to the inner surface 122c of the rising wall portion 122 of the center pillar outer 120 by spot welds 160.
[0038]
　Namely, the center pillar 200 of the present embodiment, similarly to the center pillar 100 of the first embodiment, it is possible to reinforce the center pillar outer 120. Then, the center pillar 200, like the center pillar 100 of the first embodiment, by satisfying the above equation (1) and (2), it is possible to improve the impact energy absorbing efficiency.
[0039]
　Regarding the above equations (1) and (2), the center pillar 200, since the patch member 130 is joined to the inner surface of the center pillar outer 120, H (mm), the flange portion of the center pillar outer 120 distance from the outer surface 123b of 123 to the outer surface 121b of the main wall 121 of the center pillar outer 120 becomes (height). Further, H1 (mm) is to become a distance from the side end face 132b of the vertical wall portion 132 of the patch member 130 to the outer surface 121b of the main wall 121 of the center pillar outer 120 (height).
[0040]
Modification of Second Embodiment
　In the present embodiment, showing a case where the channel-shaped patch member 130 is joined to the inner surface of the center pillar outer 120. However, as shown in FIG. 7 may be joined to a pair of patch member 140 having a L-shaped cross section on the inner surface of the center pillar outer 120. In this case, contact the main wall 121 of the center pillar outer 120, the volume of the lateral wall portion 131 of the patch member 140 is reduced, it is possible to reduce the weight of the center pillar 200.
[0041]
(Third Embodiment)
　Next, a description will be given bumper 300 according to the third embodiment of the present invention.
[0042]
　Figure 8 is a schematic perspective view of a bumper 300 according to the present embodiment (automobile structural member). 9 is a sectional view taken along line B-B of FIG. In the first embodiment and the second embodiment, the center pillar 100 or the center pillar 200, shows a case with a patch member 130. In contrast, in the present embodiment, the bumper 300 is provided with a pair of patch member 330.
[0043]
　As shown in FIGS. 8 and 9, the bumper 300, and long in one direction, a base plate 310, and a bumper body 320 which is joined to the base plate 310 (first steel member) is joined to the bumper body 320 and and a pair of patch member 330 (second-parts). The bumper 300 is disposed in front of or behind the automobile body.
　Further, the bumper 300, as shown in FIG. 9 is a vertical cross-section hollow section in the longitudinal direction, when the vehicle forward or backward any conflicts F, bending deformation under load due to a collision F, It is adapted to absorb the collision energy.
[0044]
　The base plate 310 of the bumper 300 has a flat plate shape. Further, the base plate 310 of the bumper 300, for example, plate thickness 1.4 mm, the tensile strength is 980MPa or higher grade steel sheets.
　Incidentally, the base plate 310, it is more preferable to use the 1180MPa class or higher steel.
[0045]
　Bumper body 320 of the bumper 300, as shown in FIG. 9, the cross section perpendicular to the longitudinal direction is hat-shaped, plate thickness is 0.8 ~ 2.0 mm, the tensile strength is at 980MPa grade or more steel plates . The bumper body 320 includes a main wall portion 321 which faces the base plate 310, a pair of rising wall portion 322 from both ends 321a rises vertically main wall 321, and from the main wall portion 321 parallel to the main wall portion 321 to be separated, and a pair of flanges 323 extending from one end 322a of the rising wall portion 322.
　Note that the bumper body 320, it is more preferred to use 1180MPa or higher class of the steel sheet.
[0046]
　Main wall 321 of the bumper body 320, in the widthwise center, has a projecting portion 324 projecting toward the base plate 310. Then, the protrusion 324 has a pair of central reinforcing wall portion 324a which rises towards the main wall 321 to the base plate 310, and a flat portion 324b that connects the pair of central reinforcing wall portion 324a.
[0047]
　Further, the bumper body 320, the outer surface 310a of the base plate 310 (outboard surface) are joined by a flange portion 323 for spot welding. In other words, between the inner surface 323a of the flange portion 323 of the outer surface 310a and the bumper body 320 of the base plate 310, the spot weld 150 is provided.
[0048]
　Patch member 330, plate thickness of 0.8 ~ 3.0 mm, tensile strength of steel plates of more than 980 MPa. Then, the patch member 330, the cross section perpendicular to the longitudinal direction is channel-shaped, the lateral wall portion 331, a vertical wall portion 332 which rises vertically from one end 331a of the horizontal wall portion 331, rises from the other end 331d of the horizontal wall portion 331 and a retaining wall portion 333.
　Note that the patch member 330, it is possible to use various steel such as hot stamp material. In addition, the patch member 330, it is more preferable that the tensile strength is used 1180MPa or higher class of the steel sheet, it is further preferred that the tensile strength is used 1500MPa or higher class of the steel sheet.
[0049]
　Patch member 330, and a rising wall portion 322 of the vertical wall portion 332 and the bumper body 320 and spot welding, and a main wall portion 321 of the lateral wall portion 331 and the bumper body 320 and spot welding, holding wall portions 333 and the bumper body 320 a central reinforcing wall portion 324a of the by spot welding, is joined to the outer surface of the bumper body 320. In other words, the spot welds 160 between the inner surface 332a of the vertical wall portion 332 of the outer surface 322b and the patch member 330 of the rising wall portion 322 of the bumper body 320 is formed, the outer surface of the main wall 321 of the bumper body 320 321b between the spot welds 170 between the inner surface 331b of the lateral wall 331 of the patch member 330 is formed, the inner surface 333a of the holding wall portion 333 of the outer surface 324a1 and the patch member 330 of the central reinforcing wall portion 324a of the bumper body 320 spot weld 380 is formed.
[0050]
　Lateral wall 331 of the patch member 330 has a shape along the shape of the main wall portion 321 of the bumper body 320. Further, the vertical wall portion 332 of the patch member 330 has a shape along the shape of the rising wall portion 322 of the bumper body 320. The holding wall 333 of the patch member 330 has a shape along the shape of the central reinforcing wall portion 324a of the bumper body 320. That is, in the bumper 300, lateral wall 331 of the patch member 330 abuts against the main wall portion 321 of the bumper body 320, vertical wall 332 of the patch member 330 is brought into contact with the rising wall portion 322 of the bumper body 320, a patch member 330 retaining wall portion 333 is in contact with the central reinforcing wall portion 324a of the bumper body 320.
[0051]
　As described above, in the bumper 300, since joining the patch member 330 to the bumper body 320, it is possible to reinforce the bumper body 320. Thus, when there is a conflict F the bumper 300, it is possible to prevent the breakage of the rising wall portion 322 of the bumper body 320. Moreover, since the reinforced bumper body 320 by the patch member 330, it can be reinforced only necessary portions. Therefore, as compared with the case of increasing the thickness of the whole bumper body 320, it is possible to reduce the weight gain.
[0052]
　Next, a description will be given of each parameter of the bumper 300. In the bumper 300, the bumper body 320, and the patch member 330, to satisfy both of the described formula (1) and (2) in the first embodiment.
　(H / t) ≦ 20.0 ··· Equation
　(1) 0.6 ≦ (H1 / H) ≦ 1.0 · · · formula (2)
[0053]
　Here, as in the first embodiment, H (mm) is represents the distance from the outer surface 323b of the flange portion 323 of the bumper body 320 to the outer surface 331c of the lateral wall 331 of the patch member 330 (height) there. Furthermore, t (mm) represents the thickness of the rising wall portion 322 of the bumper body 320, and the sum of the thickness of the vertical wall portion 332 of the patch member 330. Further, H1 (mm) represents a side end surface 332b of the vertical wall portion 332 of the patch member 330 distance from (distal end surface) to the outer surface 331c of the lateral wall portion 331 (height).
[0054]
　In the bumper 300, as in the first embodiment, by a patch member 330 to the bumper body 320 are joined, the bumper body 320 is reinforced, satisfies both of the above formulas (1) and (2) by, it is possible to improve the energy absorbing efficiency if there is a collision F.
[0055]
[Modification of Third Embodiment]
　In the present embodiment, showing a case where the channel-shaped patch member 330 is joined to the bumper body 320. However, as shown in FIG. 10 may be joined to a pair of patch member 340 and a pair of patch member 345 having a L-shaped cross section to the bumper body 320. In this case, contact the main wall 321 of the bumper body 320, it is possible to reduce the volume of the lateral wall portion 331 of the patch member 330, it is possible to further reduce the weight of the bumper 300.
[0056]
(Fourth Embodiment)
　Next, a description will be given bumper 400 according to the fourth embodiment of the present invention.
[0057]
　Figure 11 is a cross-sectional view showing the bumper 400 according to the present embodiment. In the bumper 300 according to the third embodiment described above shows a case where the patch member 330 is joined to the outer surface of the bumper body 320. In contrast, as shown in FIG. 11, the bumper 400 according to the present embodiment, the patch member 330 is joined to the inner surface of the bumper body 320.
[0058]
　As shown in FIG. 11, the bumper 400, lateral wall 331 of the patch member 330, while being bonded to the inner surface of the main wall portion 321 of the bumper body 320 by spot welds 170, vertical wall 332 of the patch member 330 It is joined to the inner surface of the rising wall portion 322 of the bumper body 320 by spot welds 160.
[0059]
　That is, the bumper 400 according to the present embodiment, similar to the bumper 300 according to the third embodiment, it is possible to reinforce the bumper body 320. The bumpers 400, similar to the bumper 300 according to the third embodiment, by satisfying both of the above formulas (1) and (2), it is possible to improve the impact energy absorbing efficiency.
[0060]
　Regarding the above equations (1) and (2), in the present embodiment, since the patch member 330 is joined to the inner surface of the bumper body 320, H (mm), the flange portion 323 of the bumper body 320 distance from the outer surface 323b to outer surface 321b of the main wall 321 of the bumper body 320 becomes (height). Further, H1 (mm) is a distance from the side end face 332b of the vertical wall portion 332 of the patch member 330 to the outer surface 321b of the main wall 321 of the bumper body 320 (height).
[0061]
Modification of Fourth Embodiment]
　In the present embodiment, showing a case where the channel-shaped patch member 330 is joined to the inner surface of the bumper body 320. However, as shown in FIG. 12 may be joined to a pair of patch member 340 and a pair of patch member 345 having a L-shaped cross section to the bumper body 320. In this case, contact the main wall 321 of the bumper body 320, it is possible to reduce the volume of the lateral wall portion 331 of the patch member 340 and 345, it is possible to further reduce the weight of the bumper 400.
[0062]
(Fifth Embodiment)
　Next, a description will be given door beam 500 according to a fifth embodiment of the present invention.
[0063]
　Figure 13 is a schematic perspective view of a door beam 500 according to this embodiment (an automobile structural member). Further, FIG. 14 is a sectional view taken along line C-C of Figure 13. In the first embodiment, showing a case where the center pillar 100 is provided with a patch member 130. In contrast, in the present embodiment, the door beam 500 is provided with a patch member 530.
[0064]
　As shown in FIGS. 13 and 14, the door beam 500, and long in one direction, a door beam main body 520 (first steel member), a pair joined to the door beam body 520 patch member 530 (the second steel plate and a member) and. Then, the door beam 500, the inner surface 523a of the flange portion 523 of the door beam main body 520, by spot welding to the vehicle door (not shown) is disposed inside the automobile door.
[0065]
　Door beam main body 520 of the door beam 500, plate thickness is 0.8 ~ 2.0 mm, tensile strength of steel plates of more than 980 MPa. The door beam main body 520, as shown in FIG. 14 is a cross-sectional hat shape perpendicular to the longitudinal direction, a main wall portion 521, a pair of rising wall portion 522 rises from both ends 521a of the main wall portion 521 and parallel to the main wall 521 so as to be separated from the main wall portion 521, and a pair of flanges 523 extending from one end 522a of the rising wall portion 522.
　Note that the door beam main body 520, and more preferably a tensile strength of used 1180MPa or higher class of the steel sheet.
[0066]
　Main wall 521 of the door beam main body 520 is provided in the widthwise central portion, and a projecting portion 524 projecting toward the flange portion 523. Moreover, the rising wall portion 522 of the door beam main body 520 is connected to one end 521a of the main wall portion 521, a first inclined portion 525 having a predetermined inclination angle, is connected to the first inclined portion 525, and the tilt angle and a second inclined portion 526 having different tilt angles.
[0067]
　Patch member 530 of the door beam 500, plate thickness of 0.8 ~ 3.0 mm, the tensile strength is 1180MPa or higher grade steel sheets. Then, the patch member 530, as shown in FIG. 14, the cross-sectional shape is L-shaped, has a lateral wall 531 and a vertical wall portion 532 rises from one end 531a of the lateral wall portion 531.
　Also, the patch member 530, and a main wall portion 521 as well as spot welding lateral wall portion 531 and the door beam main body 520, by spot welding the rising wall portion 522 of the vertical wall portion 532 and the door beam main body 520, the door beam main body 520 It is joined to the outer surface. In other words, with the spot weld 160 is formed between the inner surface 532a of the vertical wall portion 532 of the outer surface 522b and the patch member 530 of the rising wall portion 522 of the door beam main body 520, the main wall 521 of the door beam main body 520 spot weld 170 is formed between the inner surface 531b of the lateral wall portion 531 of the outer surface 521b and the patch member 530.
　Note that the patch member 530, it is possible to use various steel such as hot stamp material. In addition, the patch member 530, it is more preferable that the tensile strength is used 1180MPa or higher class of the steel sheet, it is further preferred that the tensile strength using the above steel plate 1500 MPa.
[0068]
　Lateral wall 531 of the patch member 530 has a shape along the shape of the main wall 521 of the door beam main body 520. Further, the vertical wall portion 532 of the patch member 530 has a shape along the shape of the rising wall portion 522 of the door beam main body 520. That is, in the door beam 500, lateral wall 531 of the patch member 530 abuts against the main wall portion 521 of the door beam main body 520, the vertical wall portion 532 of the patch member 530 is in contact with the rising wall portion 522 of the door beam main body 520.
[0069]
　As described above, in the door beam 500, because it joins the patch member 530 to the door beam main body 520, it can be reinforced door beam main body 520. Thus, when there is a conflict in the door beam 500, it is possible to prevent the breakage of the rising wall portion 522 of the door beam main body 520. Further, since the joining patch member 530 to the door beam main body 520, it can be reinforced only necessary portions. Therefore, in comparison with the case of increasing the thickness of the entire door beam main body 520, to reduce weight gain.
[0070]
　Next, a description will be given of each parameter of the door beam 500. In the door beam 500, door beams body 520 and the patch member 530, to satisfy both of the described formula (1) and (2) in the first embodiment.
　(H / t) ≦ 20.0 ··· Equation
　(1) 0.6 ≦ (H1 / H) ≦ 1.0 · · · formula (2)
　where, as in the first embodiment, H (mm) represents a distance (height) from the outer surface 523b of the flange portion 523 of the door beam main body 520 to the outer surface 531c of the lateral wall 531 of the patch member 530. Furthermore, t (mm) represents the sum of the thickness of the vertical wall portion 532 of the plate thickness, and the patch member 530 of the rising wall portion 522 of the door beam main body 520. Further, H1 (mm) represents a side end surface of the vertical wall portion 532 of the patch member 530 532b distance from (distal end surface) to the outer surface 531c of the lateral wall portion 531 (height).
[0071]
　In the door beam 500, as in the first embodiment, by a patch member 530 is joined to the door beam main body 520, the door beam main body 520 is reinforced, satisfies both of the above formulas (1) and (2) by, it is possible to improve the energy absorbing efficiency if there is a collision.
[0072]
　Incidentally, as shown in FIG. 15, as in the first embodiment, it may be joined to patch element 530 on the inner surface of the door beam main body 520.
Example
[0073]
　Next, a description will be given of an embodiment carried out for confirming the effect of the present invention.
[0074]
　Sectional shape of the center pillar 100 of the first embodiment (see FIG. 2) performs the FEM analysis of the three-point bending deformation of the hat-shaped member which imitates was determined energy absorption per unit weight. Specifically, in the longitudinal direction and supporting the hat-shaped member with two points with a predetermined gap, to determine the amount of energy absorption over a predetermined load to the intermediate position of these two points. Then, the energy absorption amount was divided by the weight of the hat-shaped member, was determined energy absorption per unit weight. In this case, the above-mentioned hat-shaped member, the tensile strength was used steel 980 MPa.
　For comparison, were subjected to the same analysis applies to a case which does not satisfy the formula (1) and / or formula (2). The test shown in Table 1 below No. In 1-11, and H, t, and all the conditions other than H1 same.

claim.　A main wall portion, the rising wall rises from the edge of the main wall portion, from the edge of the rising wall portion, and a first steel plate member having a flange portion extending parallel to the main wall portion;
　together are joined to at least one of the inner or outer surface of said first steel plate member, said main wall abutting the lateral wall portion part, and a second steel sheet member having a contact with the vertical wall portion to the rising wall portion;
the provided,
　the distance between the outer surface and the outer surface of the main wall portion of the flange portion, and of the distance between the outer surface and the outer surface of the lateral wall portion of said flange portion, one larger distance as H (mm),
　thickness of the rising wall portion, and the sum of the thickness of the vertical wall portion and t (mm),
　the distance between the outer surface of the main wall portion and the distal end surface of the vertical wall portion, and the vertical wall portion of the distance between the outer surface of the lateral wall portion and the distal end surface, any greater distance H When defined as (mm),
　the first steel plate member and the second steel member satisfying formula (1) and (2) below
the steel plate member combined structure, characterized in that.
(H / t) ≦ 20.0 ··· Equation
　(1) 0.6 ≦ (H1 / H) ≦ 1.0 · · · formula (2)
[Claim 2]
　Further comprising a first joining part for joining with the rising wall portion of the first steel sheet member, and said vertical wall portion of the second steel member
-parts combination according to claim 1, characterized in that Construction.
[Claim 3]
　Further comprising a said main wall portion of the first steel sheet member, a second bonding portion for bonding the lateral wall portion of the second steel member
-parts according to claim 1 or 2, characterized in that combination structure.
[Claim 4]
　The second steel sheet member is tensile strength 980MPa grade or more steel
-parts combined structure according to any one of 1 to 3, characterized in that.
[Claim 5]
　The first steel member is a tensile strength of 980MPa class or higher steel
-parts combination structure according to claim 4, characterized in that.
[Claim 6]
　Automobile structural member, characterized in that it comprises a steel plate member combined structure according to any one of claims 1 to 5.
[Claim 7]
　A center pillar having a steel plate member combined structure according to any one of claims 1 to 5,
　the center pillar inner and;
　constructed from the first steel plate member of said steel plate member combined structure, the center pillar inner a center pillar outer joined to;
　; is composed from the second-parts of the steel plate member combined structure, a patch member bonded to at least one of the inner or outer surface of the center pillar outer
and characterized in that it comprises center pillars.
[8.]
　A bumper with steel members combined structure according to any one of claims 1 to 5,
　base plate and;
　wherein consists first steel member, bumpers bonded to the base plate of said steel plate member combined structure body and;
　; wherein consists the second steel member of the steel plate member combined structure, wherein the patch member bonded to at least one of the inner or outer surface of the bumper body
bumper, characterized in that it comprises a.
[Claim 9]
　A door beam having a steel plate member combined structure according to any one of claims 1 to 5,
　wherein the steel plate member combined the first and the door beam body formed of a steel plate member of the structure;
　the steel plate member combined structure the consists second steel sheet member, and the inner surface or patch member bonded to at least one of an outer surface of the door beam body;
characterized in that it comprises a door beam.