JP4300937B2 - Car side impact response structure - Google Patents

Description

  The present invention relates to a structure for dealing with a side collision of an automobile.

  The following patent document 1 is known as a structure corresponding to a side collision of an automobile.

  In the structure for dealing with a side collision of an automobile described in the document 1, cross members are arranged in the vehicle width direction in the left and right seats mounted on the floor panel, and the cross member in the recess of the floor panel between the left and right seats. A load transmission member is disposed at a lower position, and a flip-up mechanism is provided in the recess so as to deploy the load transmission member upward between the cross members of the left and right seats in the event of a collision. And the load transmission member developed upward by the flip-up mechanism at the time of collision transmits the load between the left and right cross members.

  However, in such a structure, only the load from the side of the vehicle is transmitted from the collision side seat to the non-collision side seat, and the occupant seated on the non-collision side seat also applies the load in the vehicle width direction. There is a possibility of hitting the body against the door member on the non-collision side.

In addition, a precise, complicated and highly reliable structure called a flip-up mechanism is required.
JP 2001-18849 A

  As described above, the present invention secures the occupant's living space at the time of a side collision of the vehicle and distributes the load transmitted to the collision side seat to reduce the load received by the occupant of the non-collision side seat. It is an object to realize a corresponding structure simply and inexpensively.

  The first structure of the structure for dealing with a side collision of an automobile according to the present invention includes a pair of seats that are separated from each other in the vehicle width direction in a vehicle compartment and have a seat cushion portion and a seat back portion, and a pair of seats. In a structure for supporting a side collision of an automobile including an arranged interior member, a seat reinforcing member is stretched over the seat in the vehicle width direction, while the interior member faces the seat reinforcing member in the vehicle width direction. A reinforcing member is provided. The reinforcing member can be deformed by a load smaller than the strength of the seat reinforcing member in the vehicle width direction, and is joined to a floor member disposed at the lower part of the vehicle body.

According to this configuration, the seat has a reinforcing member facing the seat reinforcing member in the vehicle width direction on the interior member disposed between the pair of seats. The reinforcing member can be deformed by a load smaller than the proof strength of the seat reinforcing member in the vehicle width direction. Therefore, first, when the side of the vehicle receives a side collision, the door member enters the vehicle interior, collides with the vehicle outer end of the seat reinforcement member, and presses the vehicle toward the vehicle interior. However, the seat reinforcement member is a member extending in the vehicle width direction, so that it does not collapse in the vehicle width direction, and a living space for a passenger sitting on the seat can be secured.

  In the next stage, as described above, the seat is displaced toward the vehicle interior side, so that the vehicle inner end portion of the seat reinforcing member collides against and presses the interior member, and is provided in the interior member. The load is transmitted to the reinforcing member. Here, the reinforcing member is deformable by a load smaller than the load resistance of the seat reinforcing member in the vehicle width direction, that is, the sheet reinforcing member is bent or buckled by the load in the vehicle width direction. Alternatively, the interior member and its reinforcing member are deformed to absorb the load while securing the occupant's living space without being cramped. As a result, only a small load can be transmitted to the non-collision side seat and the occupant seated on the non-collision side seat, and the impact received can be reduced. The load applied as a reaction can also be reduced. Therefore, the safety of the occupant can be improved.

Further, according to this configuration, since the reinforcing member is joined to the high-strength portion disposed at the lower portion of the vehicle body, the reinforcing member not only deforms and absorbs the load, but also the high-strength portion disposed at the lower portion of the vehicle body. The load is also distributed and transmitted. Therefore, only a smaller load than the above can be transmitted to the non-collision side seat and the occupant seated on the non-collision side seat, so that the impact received can be reduced and the safety of the occupant can be improved.

  The above-described configuration is obtained by providing a seat reinforcing member on the seat, providing the reinforcing member to the interior member disposed between the seats, and joining the reinforcing member to the floor member disposed at the lower part of the vehicle body. Since it is good, it can be structurally simple and inexpensive.

The reinforcing member has a bottom wall portion and side wall portions erected upward from both sides in the vehicle width direction, and is formed in a substantially U shape when viewed in the vehicle front-rear direction. The corner part connecting the parts can be deformed by a load smaller than the proof stress in the vehicle width direction of the seat reinforcing member.

According to this configuration, the corner portion connecting the bottom wall portion and the side wall portion of the reinforcing member that is formed in a substantially U shape in the vehicle front-rear direction view causes the sheet reinforcing member to collide with the side wall portion of the reinforcing member due to a side collision. When the pressure is applied, it is a load absorbing part that deforms more easily than the sheet reinforcing member bends or bends. Since load transmission can be reduced, the safety of passengers seated on the non-collision side seat is improved, and the passenger seated on the collision side seat is also subjected to a load applied as a reaction by the load absorbing effect of the reinforcing member. Can be reduced and safety is improved.

Furthermore , the reinforcing member has a second reinforcing member having a substantially U-shaped cross section that forms a closed cross section in the bottom wall portion and the side wall portion, along the inner side surfaces of the bottom wall portion and the side wall portion. Via the cross member extending in the vehicle width direction of the vehicle body.

According to this configuration, the reinforcing member has the second reinforcing member on the inner surface of the bottom wall portion and the side wall portion, and the closed cross section is formed by the second reinforcing member. In the case of a side collision, the cross member is a high-strength part that extends in the vehicle width direction of the vehicle body while being deformed by the collision and pressing of the seat reinforcing member. Since the transmission can be distributed, the load transmission to the non-collision side seat is reduced, and the safety of the passenger can be improved.

  As described above, according to the present invention, it is possible to secure the occupant's living space at the time of a side collision of the vehicle and reduce the load received by the occupant of the non-collision side seat by distributing the load transmitted to the collision side seat. It is possible to easily and inexpensively realize a vehicle side impact response structure.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a front-rear direction cross-sectional view of a vehicle according to the present invention in a front seat arrangement position, FIG. 2 is an assembly view of an interior member, and FIG. 3 is provided in a door armrest, a seat, and an interior member. 4A is a perspective view showing the positional relationship with the reinforcing member, FIG. 4A is a diagram showing the state of the vehicle when the vehicle has undergone a side collision, and FIG. 4B is a diagram after the vehicle has undergone a side collision. The figure which shows the state of the vehicle when a door armrest and a sheet | seat collide, FIG.4 (C) is a figure which shows the state of the vehicle when a sheet | seat is displaced to a vehicle interior and collides with an interior member.

  In FIG. 1, a vehicle 1 has a vehicle compartment R formed by a floor member F, doors D1 and D2, and a roof member (not shown), and a pair of seats S1 and S2 are provided in the vehicle compartment R in the vehicle width. It is arranged side by side in the direction. These seats S1 and S2 are respectively mounted on a pair of slide rail lowers 9a and 9a that are fixed on the floor member F and extend in the vehicle longitudinal direction, and are slidable by a predetermined length in the vehicle longitudinal direction (FIG. 3). reference). The seats S1 and S2 are slidable by combining the slide rail lower 9a with a slide rail upper 9b described later, and may have a well-known structure, and detailed description thereof is omitted.

  A console box 3 as an interior member is disposed between the sheet S1 and the sheet S2. As shown in FIG. 2, the floor member F has a center tunnel portion Fc that protrudes upward and extends in the vehicle front-rear direction, and a cross member Fb that extends in the vehicle width direction and is a high-strength floor member. At a portion intersecting with the center tunnel portion Fc, a protruding portion Fa along the upper surface is formed. That is, the cross member Fb is formed with a protruding portion Fa at a substantially central portion in the vehicle width direction, and its left and right end portions are connected to a side sill 21 (see FIG. 1) at the vehicle side end portion. The console box 3 is fixed to the protruding portion Fa of the cross member Fb. The interior member may be an armrest disposed on the floor other than the console box.

  Doors D1 and D2 are disposed on the vehicle exterior sides of the seat S1 and the seat S2, respectively. Further, door trim members 5 and 5 are assembled to the vehicle interior side of the doors D1 and D2, respectively. Further, each of the door trim members 5 is provided with an armrest portion 7 on which an occupant seated on a seat places an arm or the like. It protrudes toward the direction.

  The door trim member 5 including the armrest portion 7 is integrally formed of a synthetic resin material such as polypropylene resin, which is less rigid than a metal such as steel and easily deforms.

  Each of the seats S1 and S2 includes a seat back portion 10 that supports the back of the occupant, a seat cushion portion 12 that receives the weight of the occupant, and a headrest (no reference) that supports the head of the occupant.

  The seat back portion 10 is provided with a steel seat back frame 11. The seat back frame 11 is a substantially rectangular frame body along the contour of the seat back portion 10, and the upper side portion 11 a. The vehicle outer side portion 11b, the vehicle inner side portion 11d, and the lower side portion 11c connecting the lower end portion of the vehicle outer side portion 11b and the lower end portion of the vehicle inner side portion 11d. Among these, the edge part 11ba is fixed to the vehicle exterior side of the vehicle outer side part 11b, and the edge part 11da is fixed to the vehicle interior side of the vehicle interior side part 11d.

  Further, the corner portion 11e sandwiched between the vehicle outer side portion 11b and the lower side portion 11c is reinforced by the corner portion reinforcing member 13, and deformation is suppressed by a load in the vehicle width direction.

  On the other hand, the seat cushion portion 12 is provided with a seat pan 19 to support the weight of the occupant, and the seat support member 17 is connected to the left and right ends of the seat pan 19 with the seat rail upper 9b. It extends downward.

  Next, the console box 3 which is an interior member will be described with reference to FIG. As described in FIG. 1, the floor member F has a center tunnel portion Fc that protrudes upward and extends in the vehicle front-rear direction, and a cross member Fb that extends in the vehicle width direction, and intersects the center tunnel portion Fc of the cross member Fb. In the portion, a protruding portion Fa along the upper surface is formed, and the console box 3 is fixed on the protruding portion Fa.

  The console box 3 is made of, for example, a synthetic resin, and has a bottomed frame 3a having vertical walls at front, rear, left and right parts, and is housed in the frame, and a substantially U-shaped reinforcing member 50 in the vehicle front-rear direction, and a reinforcing member The inner box 3b made of synthetic resin and a lid (not shown) that covers the upper open portion of the inner box 3b. The inner box 3b is used as an accessory case.

  The reinforcing member 50 includes left and right side wall portions 52 and 52 and a bottom wall portion 51 that connects these lower portions, and second reinforcing members 54 a and 54 b that bridge the side wall portion 52 and the bottom wall portion 51. 54c are arranged in the vehicle front-rear direction at a predetermined interval. The second reinforcing members 54a, 54b, 54c are welded and fixed at the flange portions (not shown) at the main portions (marked with X) of the side wall portions 52, 52 of the reinforcing member 50.

  The second reinforcing members 54a, 54b, and 54c have the same shape, and are substantially U-shaped when viewed in the vehicle front-rear direction and have a substantially U-shaped cross-section with the lower part opened when viewed in the vehicle width direction. That is, the second reinforcing members 54a, 54b, and 54c are formed in a shape having a front surface portion 55a, a rear surface portion 55c, and a connecting surface portion 55b that connects these upper end portions. Bolt insertion holes 54h and 54h are formed in the connecting surface portion 55b.

  Therefore, a plurality of closed sections are formed by the second reinforcing members 54a, 54b, 54c from the side wall portions 52, 52 to the bottom wall portion 51 of the reinforcing member 50, and the console box is operated by the occupant's force. Is never deformed.

  When a side impact load is applied to the vehicle and the seat S1 or the seat S2 collides with the console box 3, the left and right side walls 52, 52 of the reinforcing member 50 are simply directed inward. Rather than being bent, it has an appropriate deformation resistance and generates an effect of absorbing the load.

  From the above, the console box 3 which is an interior member first places the bottomed frame 3a on the protruding portion Fa of the cross member Fb, and the reinforcing member 50 to which the second reinforcing members 54a, 54b and 54c are fixed by welding. It is housed in the bottomed frame 3a, and then assembled by passing a bolt (not shown) through the bolt insertion hole 54h and fastening with a nut at the lower part of the floor member F, and then reinforcing the inner box 3b. It arrange | positions on the member 50 and is completed (refer FIG. 1).

  Next, the positional relationship among the door armrest 7, the seat S1, and the reinforcing member 50 provided in the interior member will be described with reference to FIG. Although only the sheet S1 will be described as an example, the sheet S2 is the same as the following description.

  Prior to the description of FIG. 3, a more detailed structure of the sheet S1 will be described with reference to FIG. A seat reinforcing member 15 is fixed to the vehicle front side surface of the vehicle outer side portion 11 b and the lower side portion 11 c of the seat back frame 11. That is, the seat reinforcing member 15 includes a side portion 15A extending from the upper side to the lower end portion along the vehicle outer side portion 11b of the seat back frame 11, and the vehicle width from the lower end portion of the side portion 15A toward the vehicle interior. It consists of the vehicle width direction reinforcement part 15B extended in the direction, and is formed by the bending process of the steel pipe material. The vehicle interior side end portion 15E of the vehicle width direction reinforcing portion 15B extends further to the vehicle interior side than the vehicle interior side portion 11d of the seat back frame 11.

  The seat reinforcing member 15 is set such that the yield strength in the vehicle width direction is larger than the deformation resistance of the closed cross-sectional structure of the corner portion. Accordingly, when the seat S1 is displaced toward the vehicle interior after a side collision and collides with the console box 3, the vehicle width direction reinforcing portion 15B of the seat reinforcing member 15 is in the reinforcing member 50 provided in the console box 3. As a result, the corner portion connecting the side wall portion 52 and the bottom wall portion 51 is crushed. As a result, the load is absorbed and distributed to the cross member Fb, thereby greatly reducing the transmission of the load to the seat S2. Therefore, the reinforcing member 50 may have any shape as long as it can be deformed by a load smaller than the proof strength of the seat reinforcing member 15 in the vehicle width direction and absorb the load. The transmission of the load after the side collision and the load absorption of each constituent member at the time of transmission will be described in detail later.

  Moreover, the upper end of 15 A of side parts should just be above the height position of the door armrest 7, and may be fixed so that the whole vertical width of the vehicle outer side part 11b may be met.

  As described with reference to FIG. 1, the seat S1 is slidable in the vehicle front-rear direction by a slide rail member including a slide rail lower 9a and a slide rail upper 9b. In FIG. 3, the front-rear direction position of the seat reinforcing member 15 when it is slid forward is Sf, the position when it is slid rearward is Sr, and the substantially middle position is Sc.

  The width of the reinforcing member 50 provided in the interior member in the longitudinal direction of the vehicle slides from the position Sf when the longitudinal direction position of the seat reinforcing member 15 is slid forward to the position Sr when slid backward. Slightly longer than the width, at the position Sf, the vehicle interior side end portion 15E of the seat reinforcing member 15 faces the second reinforcing member 54a of the reinforcing member 50 that reinforces the interior member. At Sr, the second reinforcing member 54c is faced, and at a substantially intermediate position Sc, the second reinforcing member 54b is faced.

  The vehicle interior side end portion 15E of the seat reinforcing member 15 faces the vertical wall surface portion 52 at a position that does not face the second reinforcing members 54a, 54b, and 54c of the reinforcing member 50 within the slidable range. It is supposed to be. That is, the vehicle interior side end 15E of the seat reinforcing member 15 can face the reinforcing member 50 of the interior member 3 regardless of the position of the seat S1 in the front-rear direction.

  As described above, the arrangement structure of the door member, the seat, the floor member, and the interior member has been described as the structure for supporting a side collision of the automobile according to the present invention. Next, with the structure as described above, it is possible to secure the occupant's living space at the time of a side collision of the vehicle and to reduce the load received by the occupant of the non-collision side seat by distributing the load transmitted to the collision side seat. The reason will be described with reference to FIGS. 4A to 4C, the seat S1 shows only the skeleton parts such as the seat back frame 11 and the seat reinforcing member 15. Further, the front-rear direction position of the sheet S1 is assumed to be at the position Sc shown in FIG.

  FIG. 4A is a diagram illustrating a state of the vehicle at the time when the vehicle receives a side collision. That is, the bumper member 92 of the vehicle 90 colliding with the outer panel D1a of the door D1 on the seat S1 side collides. An impact bar IB is provided inside the door D1 so as to contact the inner surface of the outer panel D1a.

  FIG. 4B is a diagram illustrating a state of the vehicle when the door armrest and the seat collide after the vehicle receives a side collision. According to the figure, the vehicle 90 crushes the entire door D1 together with the bumper member 92 toward the vehicle interior, and the impact bar IB is also bent toward the vehicle interior.

  Moreover, since the armrest part 7 is formed in the door trim member 5 assembled | attached to the vehicle interior side of the door D1 so that it may protrude toward the vehicle interior side, the armrest part 7 is a steel seat back frame 11. And is deformed so as to be crushed in the vehicle width direction between the edge portions 11ba of the vehicle outer side portion 11b.

  As described above, the armrest portion 7 is sandwiched between the edge portions 11ba of the vehicle outer side portion 11b of the seatback frame 11 and is crushed in the vehicle width direction. The seatback frame 11 including the edge portion 11ba is made of the synthetic resin armrest portion 7. This is because it has higher rigidity.

  FIG. 4C shows the state of the vehicle when the vehicle 90 further pushes the door D1 to the vehicle interior side from the state of FIG. 4B and the seat is displaced toward the vehicle interior and collides with the interior member. FIG.

  In the state of FIG. 4C, the lower part of the door D1 is pushed toward the vehicle interior so that the bumper 92 of the vehicle 90 gets over the side sill 21.

  Along with this, the cross member Fb extending in the vehicle width direction below the seat S1 is deformed to absorb the impact load applied to the lower part of the vehicle body applied from the vehicle 90.

  On the other hand, a part of the load applied to the door D1 is absorbed by the deformation of the door D1, and further, the edge portion 11ba of the vehicle outer side portion 11b and the door trim member 5 are sandwiched between the seat back frames 11 of the seat S1. The door trim member 5 and the door armrest 7 formed thereon are crushed.

  Therefore, the load is further absorbed by the collapse of the door armrest 7, and the load applied to the seat S1 is reduced.

  Further, as described above, the cross member Fb is deformed, and the door D1 including the door trim member 5 and the door armrest 7 enters and the seat S1 is caused by the load that pushes the seat back frame 11 of the seat S1 toward the vehicle interior. Is displaced toward the vehicle interior side, and the seat back frame 11 is slightly deformed.

  The seat back frame 11 is slightly deformed because the load applied to the door D1 is absorbed due to the deformation of the door D1 itself, and the load is absorbed when the door trim member 5 and the door armrest 7 are deformed by being sandwiched between the seat back frames 11. This is because the load on the sheet S1 is reduced and the sheet S1 has a structure capable of preventing a large deformation. The structure of the sheet S1 that can prevent this large deformation has three characteristics.

  The first is that the seat back frame 11 of the seat S1 includes an upper side 11a, a vehicle outer side 11b, a vehicle inner side 11d, a lower end of the vehicle outer side 11b, and a lower end of the vehicle inner side 11d. The frame 11 is formed in a substantially rectangular frame composed of a lower side part 11c that connects the outer side part 11b and the edge part 11ba on the vehicle exterior side of the vehicle outer side part 11b, and on the vehicle interior side of the vehicle interior side part 11d. Since the edge portion 11da is fixed, it is difficult to be deformed with respect to the load in the vehicle width direction.

  Second, the corner portion sandwiched between the vehicle outer side portion 11 b and the lower side portion 11 c is reinforced by the corner portion reinforcing member 13.

  Thirdly, the steel pipe seat reinforcing member 15 is fixed along the vehicle outer side portion 11b and the lower side portion 11c of the seat back frame 11.

  With these three characteristics, the seat back frame 11 of the seat S1 is only slightly deformed, and a living space for the occupant seated on the seat S1 is secured.

  Here, of the seat reinforcing member 15, the upper end of the side part 15 </ b> A along the vehicle outer side part 11 b is above the height position of the door armrest 7. This is because the seat reinforcing member 15 supports this even if it collides with the vehicle outer side portion 11b and applies a load inward, so that the door armrest 7 is crushed.

  The relationship between the displacement of the seat S1 toward the vehicle interior side and load absorption will be described. As can be seen from FIG. 4C, the seat S1 is an interior member fixed between the seat S1 and the seat S2 and on the protrusion Fa of the cross member Fb after being displaced toward the vehicle interior side. It is deformed so that it collides with the box 3 and falls to the sheet S2 side.

  Explaining this in detail, the edge 11da provided along the vehicle interior side 11d of the seat back frame 11 tilts the upper part of the console box 3 on the seat S1 side toward the seat S2, and the console box 3 The lower part on the seat S1 side is pushed and deformed by the vehicle interior side end 15E of the vehicle width direction reinforcing portion 15B of the seat reinforcing member 15.

  According to FIG. 3, the vehicle interior side end portion 15E of the vehicle width direction reinforcing portion 15B faces the second reinforcing member 54b of the reinforcing member 50 provided in the console box 3 at the time of side collision. When the seat S1 is displaced toward the vehicle interior and pushes the console box 3, the second reinforcing member 54b is pushed. Here, the reinforcing member 50 is not a single U-shaped plate material, but includes the second reinforcing member 54b and the like, and has a closed cross section (see FIG. 2), so it does not simply fall in the direction of the sheet S2. The corner portion connecting the side wall portion 52 and the bottom wall portion 51 of the reinforcing member 50 that collides with the vehicle interior side end portion 15E is crushed and deformed while absorbing the load by appropriate deformation resistance of the front surface portion 55a and the rear surface portion 55c. Wake up. Therefore, the load applied to the seat back frame 11 and the seat reinforcing member 15 of the seat S1 at this time is reduced by the reinforcing member 50 and further transmitted to the protruding portion Fa of the cross member Fb connected to the reinforcing member 50. The At this time, since the reinforcing member 50 is deformed by a load smaller than the proof strength of the seat reinforcing member 15 in the vehicle width direction, the seat back frame 11 is not deformed and a living space for the occupant can be secured.

  As described in FIG. 2, the floor member F has a center tunnel portion Fc that protrudes upward and extends in the vehicle front-rear direction, and a cross member Fb that extends in the vehicle width direction, and intersects the center tunnel portion Fc of the cross member Fb. The projecting portion Fa is formed along the upper surface of the portion to be formed. Therefore, the load transmitted to the protruding portion Fa of the cross member Fb connected to the reinforcing member 50 is widely dispersed and transmitted to the entire floor member F including the center tunnel portion Fc, and is applied to the seat S2. The load is extremely small. In addition, since the seat S1 and the console box 3 do not directly collide with the seat S2, there is almost no damage to the passenger seated on the seat S2.

  The best mode for carrying out the present invention has been described above with reference to the drawings. However, the embodiment is not limited to this.

Cross-sectional view in the front-rear direction at the front seat arrangement position of the vehicle according to the present invention Assembly drawing of interior parts The perspective view which shows the positional relationship of a door armrest, a sheet | seat, and a reinforcement member The figure which shows the state of the vehicle at the time of vehicle side collision The figure which shows the state of the vehicle when a door armrest and a seat collide after a vehicle side collision The figure which shows the state of a vehicle when a sheet | seat displaces inside a vehicle interior and collides with an interior member.

Explanation of symbols

3. Console box (interior member)
5 ... Door trim member 7 ... Door armrest 11 ... Seat back frame 11b ... Seat back frame vehicle outer side 11c ... Seat back frame lower side 13 ... Corner reinforcement 15 ... Seat reinforcing member 15A ... Seat reinforcing member side portion 15B ... Seat reinforcing member vehicle width direction reinforcing portion 15E ... Seat reinforcing member vehicle interior side end portion 50 ... Reinforcing member 51 ... Bottom Wall portion 52... Side wall portions 54a, 54b, 54c... Second reinforcing member Fa... Cross member protruding portion (high strength floor member)
Fb: Cross member (high-strength floor member)
D1, D2 ... Doors S1, S2 ... Seat

Claims (1)

A structure for supporting a side collision of an automobile, comprising a pair of seats that are spaced apart in the vehicle width direction in a passenger compartment and having a seat cushion portion and a seat back portion, and an interior member disposed between the pair of seats In
While the seat reinforcing member is bridged in the vehicle width direction on the seat,
The interior member includes a reinforcing member that faces the seat reinforcing member in the vehicle width direction,
The reinforcing member can be deformed by a load smaller than the proof strength of the seat reinforcing member in the vehicle width direction, and is joined to a floor member disposed at the lower part of the vehicle body , and upward from both sides of the bottom wall portion and the vehicle width direction. And a corner portion connecting the bottom wall portion and the side wall portion has a proof strength in the vehicle width direction of the seat reinforcing member. A second reinforcing member that is deformable by a smaller load, has a substantially U-shaped cross section along the inner surface of the bottom wall and the side wall and forms a closed cross section in the bottom wall and the side wall; A structure for dealing with side collision of an automobile, characterized in that the structure is joined to a cross member extending in the vehicle width direction of the vehicle body via the second reinforcing member .

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