Fastening structure for vehicle-body composing member

Abstract

To provide a fastening structure for a vehicle-body composing member that is able to prevent displacement in fastening between members whose inclined surfaces abut on each other.SOLUTION: A support portion 18 is provided on a front side member 12, and an inclined surface 22B is formed on the support portion 18. An inclined surface 28A capable of abutting on an inclined surface 22B is formed in a crash box 14, a rear end 14A of the crash box 14 is stored in the support portion 18, and the crash box 14 is fastened to the front side member 12. On the other hand, a bracket 36 is disposed inside a hollow portion 30 formed in the crash box 14, and a bolt is fastened to a nut 42 provided on the bracket 36. The bracket 36 absorbs a positional deviation between a fastening hole 25 on a front side member 12 side and a fastening hole 27 on a crash box 14 side, which occurs between the inclined surface 22B of the front side member 12 and the inclined surface 28A of the crash box 14.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a fastening structure for vehicle body components. [Background technology]

[0002] Patent Document 1 discloses a technique relating to a fastening structure between a bumper reinforcement and a crash box. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2016-132269 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-described prior art, the bumper reinforcement extending in the vehicle width direction and the crash boxes extending in the vehicle longitudinal direction are arranged so as to be substantially perpendicular to each other. The bumper reinforcement is formed to have a hat-shaped cross section when cut along the vehicle vertical direction, and the tips of the crash boxes can be abutted against a surface of the bumper reinforcement provided in the center of the vehicle vertical direction so that they can be fastened to each other.

[0005] On the other hand, when fastening a front side member to a crash box, the front side member and the crash box extend in the fore-and-aft direction of the vehicle. Therefore, variations in dimensional accuracy between the two affect the fastening portion. For example, if the front side member is formed by aluminum die casting, a so-called draft taper is formed in the die to allow the casting (front side member) to be released from the die during molding.

[0006] Therefore, the casting has a tapered surface (inclined surface) due to the draft taper. When another component (a crash box) is fastened to this casting, the surfaces that come into contact with each other are formed at approximately the same angle, but when fastening inclined surfaces together, there is a concern that the fastening position may be misaligned.

[0007] In consideration of the above, an object of the present invention is to provide a fastening structure for vehicle body components that can suppress misalignment when fastening components whose inclined surfaces abut against each other. [Means for solving the problem]

[0008] The fastening structure for a vehicle body component according to the present invention as described in claim 1 comprises an outer member provided with a support portion having a first inclined surface formed on its inner surface, the first inclined surface having an opening width that increases from the rear end toward the opening end; an inner member having a long, hollow portion formed along its length, a second inclined surface formed on its outer surface that can abut against the first inclined surface, one end of the inner member in the length direction accommodated within the support portion and fastened to the outer member; and a bracket arranged within the hollow portion, having a fastener provided thereon, and absorbing misalignment of a fastening hole that occurs between the first inclined surface and the second inclined surface.

[0009] The fastening structure for vehicle body structural members according to the present invention, as set forth in claim 1, includes an outer member, an inner member, and a bracket. The outer member is provided with a support portion, and a first inclined surface is formed on the inner surface of the support portion, the opening width of which increases from the innermost portion toward the open end. The inner member is elongated, and a hollow portion is formed in the inner member along the longitudinal direction (longitudinal direction). A second inclined surface is formed on the outer surface of the inner member, and is capable of abutting against the first inclined surface formed on the support portion of the outer member. One longitudinal end of the inner member is accommodated in the support portion, and the inner member is fastened to the outer member. Meanwhile, the bracket is disposed in the hollow portion formed in the inner member, and a fastening tool is provided therein. This bracket absorbs misalignment of the fastening hole that occurs between the first inclined surface of the outer member and the second inclined surface of the inner member.

[0010] In the present invention, a first inclined surface is formed on the inner surface of the support part of the outer member, and a second inclined surface that can abut against the first inclined surface is formed on the outer surface of the inner member. When one longitudinal end of the inner member is accommodated in the support part of the outer member, the outer member and the inner member are fastened at the support part via a fastener provided on the bracket, with the second inclined surface of the inner member abutting against the first inclined surface of the support part.

[0011] Generally, when fastening two members together, the misalignment of the fastening holes when fastening inclined surfaces inclined relative to the vertical direction of the vehicle together is greater than when fastening in a state where vertical surfaces formed along the vertical direction of the vehicle together are in contact. As a result, the relief holes to absorb the misalignment become larger, and the fastening bearing surface of the outer member becomes larger, resulting in lower rigidity.

[0012] In contrast, in the present invention, the bracket provided on the inner member absorbs the misalignment of the fastening holes that occurs between the first inclined surface of the outer member and the second inclined surface of the inner member, so the relief holes used to absorb the misalignment can be made smaller, and the rigidity of the outer member is ensured.

[0013] The fastening structure for vehicle body structural members according to the present invention as set forth in claim 2 is the fastening structure for vehicle body structural members according to the present invention as set forth in claim 1, in which the bracket is formed of an elastically deformable material.

[0014] In the fastening structure for vehicle body structural members according to the present invention as set forth in claim 2, the bracket is formed of an elastically deformable member, and the position of the fastened device can be made to follow the position of the fastening hole of the inner member by elastic deformation of the bracket. As a result, the bracket absorbs misalignment of the fastening hole that occurs between the first inclined surface of the outer member and the second inclined surface of the inner member.

[0015] The fastening structure for vehicle body constituent members according to the present invention as set forth in claim 3 is the fastening structure for vehicle body constituent members according to the present invention as set forth in claim 1, wherein the outer members are side members formed from castings and arranged on both the left and right sides of the vehicle width direction at the front or rear of the vehicle, each extending along the fore-and-aft direction of the vehicle, and the inner members are crash boxes arranged between a bumper provided in the vehicle width direction at the front or rear end of the vehicle and the side members, and extending along the fore-and-aft direction of the vehicle.

[0016] In the fastening structure for vehicle body structural members according to the present invention as set forth in claim 3, the outer members are formed of castings and are side members disposed on both the left and right sides in the vehicle width direction at the front (or rear) of the vehicle, each extending along the vehicle longitudinal direction, while the inner members are crash boxes disposed between the bumper extending in the vehicle width direction at the front end (or rear end) of the vehicle and the side members, each extending along the vehicle longitudinal direction.

[0017] Because the outer member (side member) is formed by casting, a draft taper is formed in the mold to release the outer member from the mold during molding. Therefore, a first inclined surface is formed on the inner surface of a support portion provided on the outer member by the draft taper. To improve the rigidity of the support portion, a second inclined surface that abuts against the first inclined surface is formed on the outer surface of an inner member (crash box) housed in the support portion. Meanwhile, because the outer surface of the outer member at the support portion extends along the vehicle's vertical and longitudinal directions, the first and second inclined surfaces intersect with each other in the fastening direction of the fastener, and relief holes must be provided to allow for dimensional differences.

[0018] In the present invention, the bracket provided on the inner member can absorb misalignment of the fastening holes that occurs between the first inclined surface of the outer member and the second inclined surface of the inner member, making it possible to minimize the size of the relief holes and ensuring the rigidity of the outer member. In other words, by applying the present invention, even cast members can be joined with high positional accuracy. Therefore, the relief holes required to absorb misalignment can be made smaller, ensuring the rigidity of the outer member.

[0019] The fastening structure for a vehicle body component according to the present invention as described in claim 4 is the fastening structure for a vehicle body component according to the present invention as described in claim 1, wherein the bracket is formed of a plate material and includes a notch portion that engages with a partition portion that partitions the hollow portion.

[0020] In the fastening structure for vehicle body structural members according to the present invention as set forth in claim 4, the bracket is made of a plate material and has a notch formed in the bracket. This notch engages with a partition wall that defines a hollow space formed in the inner member. This makes it possible to easily position the bracket relative to the inner member.

[0021] The fastening structure for a vehicle body component of the present invention as described in claim 5 is the fastening structure for a vehicle body component of the present invention as described in claim 4, wherein the bracket further includes a pair of fastening pieces on which the fasteners are provided and which each stand up from the back of the support part toward the opening end, and a convex bead which is provided between the base parts of the pair of fastening pieces and the cutout part and which protrudes toward the opening end.

[0022] In the fastening structure for vehicle body structural members according to the present invention as set forth in claim 5, the bracket further includes a pair of fastening pieces and a convex bead. The pair of fastening pieces are provided with fasteners and each rise from the innermost portion of a support portion provided on the outer member toward the open end. Meanwhile, the convex bead is provided between the base portions of the pair of fastening pieces and the notch portion, and protrudes toward the open end. The formation of the convex bead improves the rigidity of the bracket itself and reduces the resistance to elastic deformation of the bracket. [Effects of the Invention]

[0023] As described above, the fastening structure for vehicle body constituent members according to the present invention can suppress misalignment when fastening members whose inclined surfaces abut against each other. [Brief explanation of the drawings]

[0024] [Figure 1] 1 is a perspective view showing a fastening structure for vehicle body components according to an embodiment of the present invention; [Figure 2] 1 is an exploded perspective view showing a part of a fastening structure for vehicle body components according to an embodiment of the present invention; [Figure 3] FIG. 2 is a cross-sectional view taken along the line AA shown in FIG. [Figure 4] FIG. 4 is a cross-sectional view corresponding to FIG. 3 as a comparative example. DETAILED DESCRIPTION OF THE INVENTION

[0025] Hereinafter, a fastening structure for vehicle body structural members according to an embodiment of the present invention will be described with reference to the drawings. Note that the arrow FR shown as appropriate in each drawing indicates the front side in the vehicle longitudinal direction, and the arrow UP indicates the upper side in the vehicle vertical direction. The arrow OUT indicates the outside in the vehicle width direction. Hereinafter, when the directions of front-rear, up-down, and left-right are simply used in the description, they refer to front-rear in the vehicle longitudinal direction, up-down in the vehicle vertical direction, and left-right in the vehicle horizontal direction (vehicle width direction), unless otherwise specified.

[0026] <Configuration of fastening structure for vehicle body components> First, the configuration of the fastening structure for vehicle body structural members according to this embodiment will be described.

[0027] FIG. 1 shows a perspective view of a fastening structure 10 for vehicle body components, illustrating a fastening portion 16 between a front side member (outer member, side member) 12 and a crash box (inner member) 14, which serves as a so-called impact absorbing member.

[0028] The front side members 12 are disposed on both the left and right sides in the vehicle width direction at the front of the vehicle and extend in the vehicle longitudinal direction. The front side members 12 also include wheel houses and the like (not shown), and are integrally formed by casting using aluminum alloy, magnesium alloy, or the like.

[0029] The crash boxes 14 are rectangular tubular and extend in the longitudinal direction of the vehicle. Rear ends 14A of the crash boxes 14 are supported by front ends 12A of the front side members 12, and a bumper (not shown) extending in the transverse direction of the vehicle at the front end of the vehicle is connected to a front end 14B of the crash boxes 14. The crash boxes 14 are formed by extrusion molding using a material such as an aluminum alloy or a magnesium alloy.

[0030] Here, a support portion 18 is provided at the front end portion 12A of the front side member 12. As shown in Fig. 2, the support portion 18 is substantially U-shaped with an opening on the upper side, and is configured to include a lower wall portion (rear portion) 20 and a pair of side wall portions 22 facing each other.

[0031] The outer surfaces 22A of the side wall portions 22 stand upright in the vertical direction of the vehicle, and on the inner surfaces 23 of the pair of side wall portions 22, inclined surfaces 22B are formed that incline in a direction in which they move away from each other (widen the opening width) as they move from the lower wall portion 20 toward the upper ends (opening ends) 22C of the pair of side wall portions 22.

[0032] On the other hand, the rear end portions 14A of the crash boxes 14 are housed within the support portions 18 of the front side members 12, and so the crash boxes 14 are formed to follow the shape of the support portions 18. Therefore, the crash boxes 14 have an inverted trapezoidal shape and are configured to include an upper wall portion 24, a lower wall portion 26, and a pair of side wall portions 28, with the upper wall portion 24 being longer than the lower wall portion 26.

[0033] In addition, since the pair of side wall portions 28 of the crash box 14 can respectively abut against the inclined surfaces 22B of the pair of side wall portions 22 of the front side member 12, an inclined surface 28A that abuts against the inclined surface 22B is formed on the outer surface of the side wall portion 28 (outer surface 15 of the crash box 14).

[0034] Furthermore, because the crash box 14 has a rectangular cylindrical shape, a hollow portion 30 is provided along the longitudinal direction of the crash box 14. Inside the hollow portion 30, a horizontal wall portion (partition portion) 32 that divides the hollow portion 30 into upper and lower portions and a vertical wall portion (partition portion) 34 that divides the hollow portion 30 into left and right portions in the width direction are provided, and the horizontal wall portion 32 and the vertical wall portion 34 intersect at the center of the hollow portion 30.

[0035] A metal bracket 36 is disposed within the hollow portion 30. As shown in Fig. 3, the bracket 36 has a rectangular plate shape and can be disposed along the vehicle width direction in the crash box 14. The bracket 36 includes a base 38 and a pair of fastening pieces 40, and the base 38 is provided in the center in the longitudinal direction.

[0036] Meanwhile, the fastening pieces 40 are provided at both longitudinal ends of the bracket 36. The fastening pieces 40 are formed by bending them so as to stand upward relative to the base 38, and are provided with nuts (fastened devices) 42, for example.

[0037] A slot-shaped notch 44 is formed in the longitudinal center of the base 38, extending along the width direction of the bracket 36. This notch 44 is sized to allow the vertical wall portion 34 formed on the crash box 14 to pass through. In addition, the bracket 36 has an arc-shaped convex bead 46 that protrudes upward between the notch 44 and the base portion 40A of the fastening piece 40, extending along the width direction of the bracket 36.

[0038] In this embodiment, the notched portions 44 of the bracket 36 are engaged with the vertical wall portions 34 of the crash box 14, and the bracket 36 is placed on the horizontal wall portions 32 within the hollow portion 30 of the crash box 14, as shown in Figure 2. In this state, the crash box 14 is fastened to the front side member 12 via nuts 42 and bolts 48 (see Figure 1).

[0039] <Action and effect of the fastening structure of the vehicle body components> Next, the operation and effect of the fastening structure for vehicle body constituent members according to this embodiment will be described.

[0040] 1, in this embodiment, a fastening structure 10 for a vehicle body structural member is configured to include a front side member 12, a crash box 14, and a bracket 36. The front side member 12 is provided with a support portion 18, and an inner surface 23 of a side wall portion 22 of the support portion 18 is formed with an inclined surface 22B whose opening width increases from the lower wall portion 20 of the support portion 18 toward an upper end 22C of the side wall portion 22.

[0041] Furthermore, the crash box 14 is elongated and has a hollow portion 30 formed along the longitudinal direction. An inclined surface 28A is formed on the outer surface 15 of the crash box 14, which can come into contact with an inclined surface 22B formed on the support portion 18 of the front side member 12. A rear end portion 14A of the crash box 14 is housed within the support portion 18, and the crash box 14 is fastened to the front side member 12.

[0042] Meanwhile, bracket 36 is disposed in hollow portion 30 formed in crash box 14, and a nut 42 is provided therein. Bracket 36 absorbs misalignment between fastening hole 25 on the front side member 12 side and fastening hole 27 on the crash box 14 side that occurs between inclined surface 22B of front side member 12 and inclined surface 28A of crash box 14.

[0043] In this embodiment, an inclined surface 22B is formed on the inner surface 23 of the side wall portion 22 of the support portion 18 of the front side member 12, and an inclined surface 28A that can abut against the inclined surface 22B is formed on the outer surface 15 of the crash box 14. When the rear end portion 14A of the crash box 14 is placed in the support portion 18 of the front side member 12, the bolt 48 (see FIG. 1 ) is fastened to the nut 42 provided on the bracket 36 with the inclined surface 28A of the crash box 14 abutting against the inclined surface 22B of the support portion 18. In this way, the front side member 12 and the crash box 14 are fastened together at the support portion 18.

[0044] 4, when the outer member 100 and the inner member 102 are fastened together with the first inclined surface 100A of the outer member 100 and the second inclined surface 102A of the inner member 102 in contact with each other, the positional deviation between the fastening holes 104 and 106 becomes larger than when the fastening is performed with the vertical surfaces formed along the vehicle up-down direction in contact with each other, although this is not shown in the figures. As a result, the relief holes for absorbing this positional deviation become larger, and the fastening bearing surface 108 in the outer member 100 becomes larger, resulting in a lower rigidity.

[0045] 2, in this embodiment, the brackets 36 provided on the crash boxes 14 can absorb any misalignment of the fastening holes 25, 27 that occurs between the inclined surfaces 22B of the front side member 12 and the inclined surfaces 28A of the crash boxes 14. As a result, in this embodiment, the relief holes for absorbing the misalignment can be made smaller, making it possible to ensure the rigidity of the front side member 12.

[0046] Specifically, in this embodiment, the bracket 36 is formed of an elastically deformable member. Therefore, in response to misalignment of the fastening holes 25, 27 that occurs between the inclined surface 22B of the front side member 12 and the inclined surface 28A of the crash box 14, the bracket 36 can elastically deform to follow the fastening holes 27 of the crash box 14 and align the positions of the nuts 42. As a result, the misalignment of the fastening holes 25, 27 that occurs between the inclined surface 22B of the front side member 12 and the inclined surface 28A of the crash box 14 is absorbed via the bracket 36.

[0047] As described above, in this embodiment, it is possible to suppress misalignment when fastening members in which the inclined surfaces 22B and 28A come into contact with each other.

[0048] Furthermore, in this embodiment, the front side member 12 is formed of a casting. Therefore, a draft taper is formed in the mold in order to release the front side member 12 from the mold when the front side member 12 is molded, and the draft taper forms an inclined surface 22B on the inner surface 23 side of the support portion 18 provided on the front side member 12.

[0049] In order to improve the rigidity of the support portion 18, an inclined surface 28A that abuts against the inclined surface 22B is formed on the outer surface 15 side of the crash box 14 housed in the support portion 18. Meanwhile, the outer surface 22A of the front side member 12 in the support portion 18 extends in the vehicle up-down direction and in the vehicle front-rear direction, so that the inclined surface 22B and the inclined surface 28A intersect with each other in the fastening direction of the bolt 48 (see FIG. 1), and it becomes necessary to provide a relief hole 29 to allow for dimensional differences.

[0050] In this embodiment, the brackets 36 provided on the crash boxes 14 can absorb misalignment of the fastening holes 25, 27 that occurs between the inclined surfaces 22B of the front side member 12 and the inclined surfaces 28A of the crash boxes 14, making it possible to make the relief holes as small as possible and ensuring the rigidity of the front side member 12. In other words, application of this embodiment makes it possible to join even cast members with high positional accuracy.

[0051] Furthermore, if the crash boxes 14 are formed from extruded members, a difference in rigidity will arise between them and the front side members 12, which are formed from cast members, and there is concern that the crash boxes 14 may deform when fastened. However, in this embodiment, by fastening the crash boxes 14 to the front side members 12 via brackets 36, deformation of the crash boxes 14 can be suppressed.

[0052] Furthermore, in this embodiment, the bracket 36 is made of a plate material, and has a notch 44 formed in the bracket 36. This notch 44 engages with the vertical wall 34 that defines the hollow portion 30 formed in the crash box 14. This makes it possible to easily position the bracket 36 relative to the crash box 14.

[0053] 2 and 3, in this embodiment, the bracket 36 further includes a pair of fastening pieces 40 and a convex bead 46. The pair of fastening pieces 40 are provided with nuts 42 and each stand upright from the lower wall portion 20 of the support portion 18 provided on the front side member 12 toward the upper ends 22C of the pair of side wall portions 22.

[0054] On the other hand, the convex bead 46 is provided between the root portion 40A of the pair of fastening pieces 40 and the notch portion 44, and protrudes upward. The formation of the convex bead 46 improves the rigidity of the bracket 36 itself and also makes it possible to reduce the resistance force to elastic deformation of the bracket 36.

[0055] In this embodiment, the front side members 12 are formed by casting. This allows for greater freedom in designing the shape of the front side members 12 and improves manufacturing efficiency compared to, for example, forming by extrusion molding.

[0056] In the above embodiment, the front side member 12 is formed by casting, but the present invention is not limited to this. For example, the front side member 12 may be formed of CFRP (carbon fiber reinforced plastic) in addition to metal. In this case, the front side member 12 is formed by injection molding, for example.

[0057] In the above embodiment, the front side member 12 and the crash box 14 fastened to the front side member 12 are described, but the present invention can be applied to other than the front side member 12 and the crash box 14. For example, although not shown, the present invention may be applied to a rear side member and a crash box fastened to the rear side member. Furthermore, the present invention can be applied to other than side members and crash boxes that extend along the vehicle longitudinal direction.

[0058] Although one embodiment of the present invention has been described above, the present invention is not limited to such an embodiment, and one embodiment may be appropriately combined with various modified examples, and the present invention may of course be embodied in various forms as long as it does not deviate from the gist of the present invention.

[0059] <Additional Notes>

[0060] The following configurations may be appropriately combined to form the fastening structure for vehicle body structural members according to the present invention.

[0061] (Configuration 1) The fastening structure for vehicle body components includes an outer member having a support portion on the inner surface of which is formed a first inclined surface whose opening width increases from the back to the open end; an inner member having a long shape, a hollow portion along the long length, and a second inclined surface formed on the outer surface that can abut against the first inclined surface, one end of which in the long length direction is accommodated within the support portion and fastened to the outer member; and a bracket that is arranged within the hollow portion, has a fastener provided thereon, and absorbs misalignment of the fastening hole that occurs between the first inclined surface and the second inclined surface.

[0062] (Configuration 2) The bracket is formed of an elastically deformable member.

[0063] (Configuration 3) The outer members are formed from castings and are side members that are arranged on both the left and right sides of the vehicle width direction at the front or rear of the vehicle and extend along the fore-and-aft direction of the vehicle, and the inner members are crash boxes that are arranged between the side members and a bumper that extends in the vehicle width direction at the front or rear end of the vehicle and extend along the fore-and-aft direction of the vehicle.

[0064] (Configuration 4) The bracket is made of a plate material and includes a notch that is engaged with a partition wall that defines the hollow portion.

[0065] (Configuration 5) The bracket further includes a pair of fastening pieces on which the fastening device is mounted and which each stand up from the back of the support portion toward the opening end, and a convex bead that is provided between the base portions of the pair of fastening pieces and the cutout portion and protrudes toward the opening end. [Explanation of symbols]

[0066] 10 Fastening structure of body components 12 Front side member (outer member) 14 Crash box (inner part) 14A Rear end (one end of the inner member in the longitudinal direction) 15 Outer surface (outer surface of inner member) 18 Support part 20 Lower wall (back) 22B Slope (1st slope) 22C Upper end (open end) 23 Inner surface (inner surface of outer member) 25 Fastening hole 27 Fastening hole 28A Slope (second slope) 30 Hollow part 32 Side wall part (partition part) 34 Vertical wall section (partition wall section) 36 Bracket 40 Fastening piece 40A base 42 Nut (fastened device) 44 Notch 46 Convex bead

Claims

1. an outer member provided with a support portion having a first inclined surface formed on an inner surface side thereof, the first inclined surface having an opening width that increases from a rear portion toward an open end; an inner member having an elongated shape, a hollow portion provided along the longitudinal direction, a second inclined surface formed on an outer surface thereof that can abut against the first inclined surface, one end of the inner member in the longitudinal direction housed within the support portion and fastened to the outer member; a bracket disposed in the hollow portion, on which a fastening tool is provided, for absorbing misalignment of a fastening hole occurring between the first inclined surface and the second inclined surface; A fastening structure for vehicle body components comprising:

2. 2. The fastening structure for fastening structural members of vehicle body constituent members according to claim 1, wherein the bracket is formed of an elastically deformable material.

3. the outer members are side members formed by casting, disposed on both the left and right sides of the vehicle width direction at the front or rear of the vehicle, and extending along the front-rear direction of the vehicle, 2. The fastening structure for vehicle body constituent members according to claim 1, wherein the inner member is a crash box disposed between a bumper extending in the vehicle width direction at the front end or rear end of the vehicle and the side member and extending along the vehicle fore-and-aft direction.

4. The bracket is a plate material, 2. The fastening structure for vehicle body structural members according to claim 1, wherein the bracket includes a notch that is engaged with a partition wall that defines the interior of the hollow portion.

5. The bracket is a pair of fastening pieces provided with the fastener and each standing upright from the innermost portion of the support portion toward the open end; a convex bead provided between the root portion of each fastening piece and the notch portion and protruding toward the opening end; 5. The fastening structure for vehicle body structural members according to claim 4, further comprising:

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