JP2009143252A - Vehicle reinforcing structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a vehicle reinforcing structure capable of suppressing falling down of both end parts of a reinforcement when a load is input to first and second panel members having curvatures in the longitudinal axial direction. <P>SOLUTION: In a center pillar 14, a closed cross section is formed by an outer panel 16 and an inner panel 18. The center pillar 14 has the curvature in the axial direction, and an upper part in the axial direction is curved to the inside in the vehicle width direction with respect to a lower part in the axial direction. The reinforcement 20 having an approximately same curvature as the outer panel 16 in the axial direction is joined to an inner wall surface of the outer panel 16. The reinforcement 20 has an approximately U shaped cross section and is equipped with an extension part 20B extended to the position close to the inner wall surface of the inner panel 18 on both end parts 20A. A wall part 24A formed on the inside of the extension part 20B and a wall part 24B formed on the outside of the extension part 20B are formed on the inner wall surface of the inner panel 18. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a vehicle reinforcing structure in which a reinforcement is provided in a closed cross section formed by a first panel member and a second panel member.

In the following Patent Document 1, both sides of the reinforcement having a substantially U-shaped cross section that is substantially the same shape as the outer panel are disposed on the outer panel within the closed cross section of the center pillar that is formed by connecting the outer panel and the inner panel to form a closed cross section. A structure is disclosed in which both sides are reinforced by spot welding.
JP-A-6-72787

  However, in the case of the above prior art, when a heavy load is input to the center pillar, which is a skeleton member having a predetermined curvature, at the time of a collision, the both side portions of the reinforcement whose cross-sectional shape is substantially U-shaped are cross-sectioned. There is a risk of falling inward, causing a sudden drop in yield strength and deformation.

  In consideration of the above facts, the present invention aims to provide a vehicle reinforcing structure that can suppress the collapse of both ends of the reinforcement when a load is input to a skeleton member having a curvature in the longitudinal axis direction. is there.

  According to a first aspect of the present invention, in a closed cross section formed by a first panel member on the vehicle outer side having a curvature in the longitudinal axis direction and a second panel member disposed on the vehicle inner side than the first panel member. The vehicle reinforcement structure is provided with a reinforcement having substantially the same curvature as the first panel member and joined to the first panel member, wherein the reinforcement has a substantially U-shaped cross section, and both end portions thereof are A plate of the extended portion on the inner wall surface of the second panel member, comprising: an extended portion provided by extending to a position in contact with or close to the inner wall surface in the closed section of the second panel member A wall portion is provided in at least a part of the position facing in the thickness direction.

  According to a second aspect of the present invention, in the vehicle reinforcing structure according to the first aspect, the first panel member is an outer panel, the second panel member is an inner panel, and the outer panel and the inner panel extend in the vehicle vertical direction. Pillars extending along the side are formed.

  According to a third aspect of the present invention, in the vehicle reinforcing structure according to the first aspect, the first panel member is a lower panel, the second panel member is a floor panel, and the lower panel and the floor panel extend in the vehicle front-rear direction. A side member kick portion extending along the side portion is formed.

  According to a fourth aspect of the present invention, in the vehicle reinforcement structure according to any one of the first to third aspects, the wall portion is provided inside a substantially U-shaped cross section of the reinforcement. It is characterized by.

  According to a fifth aspect of the present invention, in the vehicle reinforcement structure according to any one of the first to third aspects, the wall portion is provided outside a substantially U-shaped cross section of the reinforcement. It is characterized by.

  A sixth aspect of the present invention is the vehicle reinforcing structure according to any one of the first to fifth aspects, wherein the reinforcement is formed of a high-tensile steel plate.

  According to the first aspect of the present invention, a closed section is formed by the first panel member on the vehicle outer side and the second panel member on the vehicle inner side that have a curvature in the longitudinal axis direction, and is substantially the same as the first panel member. Reinforce having the same curvature and having a substantially U-shaped cross section is coupled to the first panel member in the closed cross section. When a load is input to the first panel member and the second panel member having a curvature in the longitudinal axis direction due to a collision or the like, the reinforce tends to be deformed by receiving a bending moment. At that time, the inner wall surface in the closed cross section of the second panel member is provided with a wall portion at least at a part of the extension portion provided at both ends of the reinforcement facing the plate thickness direction. Both ends of the substantially U-shaped cross section of the reinforcement that receives the bending moment are deformed in the thickness direction, and the extending portions provided at the both ends hit the wall portion of the second panel member. As a result, further deformation (falling down) at both ends of the reinforcement is suppressed, so that a rapid decline in the yield strength of the reinforcement can be suppressed.

  According to the second aspect of the present invention, the first panel member is an outer panel, the second panel member is an inner panel, and the outer panel and the inner panel constitute a pillar extending in the vehicle vertical direction. Therefore, when a load is input from the outer panel side of the pillar having a curvature in the longitudinal direction due to a collision or the like, both ends of the substantially U-shaped cross section of the reinforcement that receives the bending moment are deformed and extended in the plate thickness direction. The part hits the wall of the inner panel. As a result, further deformation (falling down) at both ends of the reinforcement is suppressed, so that a rapid decline in the yield strength of the reinforcement can be suppressed.

  According to the third aspect of the present invention, the first panel member is a lower panel, the second panel member is a floor panel, and the kick portion of the side member extending along the vehicle front-rear direction between the lower panel and the floor panel is provided. As a result, when a load is applied to the kick part of the side member having a curvature in the longitudinal direction due to a collision or the like, both ends of the substantially U-shaped cross section of the reinforcement that receives the bending moment are in the thickness direction. The extended part hits against the wall part of the floor panel. As a result, further deformation (falling down) at both ends of the reinforcement is suppressed, so that a rapid decline in the yield strength of the reinforcement can be suppressed.

  According to the fourth aspect of the present invention, since the wall portion is provided inside the substantially U-shaped cross section of the reinforcement, when both end portions of the substantially U-shaped cross section of the reinforcement are deformed inward, The extending portions provided at both end portions contact the wall portion of the second panel member. Thereby, it can suppress that the both ends of the substantially U-shaped cross section of reinforcement are deform | transforming inside, and can suppress the rapid fall of yield strength.

  According to the fifth aspect of the present invention, since the wall portion is provided outside the substantially U-shaped cross section of the reinforcement, when both ends of the substantially U-shaped cross section of the reinforcement are deformed outward, The extending portions provided at both end portions contact the wall portion of the second panel member. Thereby, it can suppress that the both ends of the substantially U-shaped cross section of reinforcement are deform | transforming outside, and can suppress the rapid fall of yield strength.

  According to the sixth aspect of the present invention, since the reinforcement is formed of a high-tensile steel plate, the deformation is suppressed when the extended portions provided at both ends of the reinforcement hit the wall portion of the second panel member. The effect to be done is large with respect to general steel plates.

  As described above, the vehicle reinforcing structure according to the first aspect of the present invention is configured such that when a load is input to the first panel member and the second panel member having a curvature in the longitudinal axis direction at the time of a collision, It has the outstanding effect that the fall of the both ends of reinforcement can be suppressed.

  The vehicle reinforcing structure according to the second aspect of the present invention is excellent in that the collapse of both ends of the reinforcement can be suppressed when a load is input to the pillar having a curvature in the longitudinal axis direction at the time of collision or the like. It has the effect.

  The vehicle reinforcing structure according to the third aspect of the present invention suppresses falling of both ends of the reinforce when a load is input to the kick portion of the side member having a curvature in the longitudinal axis direction at the time of a collision or the like. It has an excellent effect of being able to.

  The vehicle reinforcing structure according to the fourth aspect of the present invention has an excellent effect that the both end portions of the reinforcement can be prevented from being deformed inside the substantially U-shaped cross section, and a rapid decrease in the proof stress can be suppressed. Have

  The vehicle reinforcing structure according to the present invention described in claim 5 is excellent in that both ends of the reinforcement can be prevented from being deformed to the outside of the substantially U-shaped cross section, and a rapid decrease in the proof stress can be suppressed. Have

  The vehicle reinforcing structure according to the sixth aspect of the present invention has an excellent effect that the effect of suppressing the deformation of the reinforcement is greater than that of a general steel plate.

  [First Embodiment]

  Hereinafter, a first embodiment of a vehicle reinforcing structure according to the present invention will be described with reference to FIGS. In these drawings, an arrow FR appropriately shown indicates the vehicle front side, an arrow UP indicates the vehicle upper side, and an arrow OUT indicates the vehicle width direction outer side.

  FIG. 1 is a partial perspective view of a vehicle body including a center pillar to which a vehicle reinforcing structure is applied. 2 is an overall perspective view of the center pillar, and FIG. 3 is a cross-sectional view taken along line AA of FIG. As shown in FIG. 1, a center pillar 14 as a skeleton member extending along the vehicle vertical direction is stretched over the opening 12 of the body 10 constituting the vehicle side portion. A front side door (not shown) is provided in the opening 12A on the vehicle front side from the center pillar 14, and a rear side door (not shown) is provided in the opening 12B on the vehicle rear side from the center pillar 14. ing.

  As shown in FIGS. 1 and 2, the center pillar 14 has a curvature in the axial direction (longitudinal axis direction), and the upper part in the axial direction is curved inward in the vehicle width direction with respect to the lower part in the axial direction. Is formed. As shown in FIG. 3, the center pillar 14 includes an outer panel 16 disposed on the outer side in the vehicle width direction, and an inner panel 18 disposed on the inner side in the vehicle width direction. The outer panel 16 has a substantially hat-shaped cross section, and the pair of front and rear flange portions 16A in the vehicle front-rear direction is spot-welded to the pair of front and rear mounting portions 18A of the inner panel 18 so that the outer panel 16 and the inner panel 18 A closed cross section is formed. The intermediate portion 16B of the outer panel 16 has a substantially U-shaped cross section that protrudes outward in the vehicle width direction, and a recessed portion 16C that is recessed inward in the vehicle width direction is formed at the top of the protruding portion. The recessed portion 16 </ b> C is formed along the axial direction of the outer panel 16.

  In the closed cross section of the center pillar 14, a reinforcement 20 having a curvature substantially the same as that of the outer panel 16 is disposed in the axial direction. The reinforcement 20 has a substantially U-shaped cross section that protrudes outward in the vehicle width direction, and a substantially planar wall surface 21 formed on the outer side of the reinforcement 20 in the vehicle width direction is formed on the inner side of the outer panel 16 in the vehicle width direction. The flat wall surface 17 is joined by spot welding. At both ends 20A of the substantially U-shaped cross section of the reinforcement 20, an extending portion 20B extending to a position close to the inner wall surface on the outer side in the vehicle width direction of the inner panel 18 is provided. The extended portion 20B is a free end. Further, a spot welding position where the wall surface 21 of the reinforcement 20 is joined to the wall surface 17 of the outer panel 16 is set on the inner side of the substantially U-shaped cross section from the tip of the extending portion 20B. In addition, a recessed portion 20 </ b> C that is recessed inward in the vehicle width direction is formed along the longitudinal direction at a position facing the recessed portion 16 </ b> C of the outer panel 16 at the top of the protruding portion of the reinforcement 20. The depression 20C of the reinforcement 20 and the depression 16C of the outer panel 16 can prevent the positional relationship between the outer panel 16 and the reinforcement 20 from shifting when a load is input.

  On the inner wall surface (wall surface on the outer side in the vehicle width direction) within the closed cross section of the inner panel 18, a recess 24 recessed inward in the vehicle width direction is provided along the axial direction (the vehicle vertical direction) at a position facing the extending portion 20B. Is formed. The recessed part 24 is arrange | positioned so that each extension part 20B of the reinforcement 20 may be enclosed at predetermined intervals. The recess 24 has a wall portion 24 </ b> A formed inside the substantially U-shaped cross section of the reinforcement 20 and a substantially U-shaped portion of the reinforcement 20 at a position facing the thickness direction of the extending portion 20 </ b> B of the reinforcement 20. And a wall portion 24B formed outside the cross section. Furthermore, the recessed part 24 is provided with the bottom part 24C arrange | positioned in the direction orthogonal to the wall part 24A and the wall part 24B in the position facing the end surface of the extension part 20B. The wall portion 24A and the wall portion 24B are substantially planar, and are respectively provided along the vehicle vertical direction on the inner side and the outer side of the extending portion 20B in the vehicle front-rear direction.

  As shown in FIG. 2, a rocker 28 extending along the vehicle front-rear direction is disposed on the lower side of the center pillar 14. The rocker 28 includes a rocker outer panel 30 having a cross-sectional hat shape disposed on the outer side in the vehicle width direction, and a rocker inner panel 32 having a cross-sectional hat shape disposed on the inner side in the vehicle width direction. 32 and a closed cross section is formed. The lower end portion of the center pillar 14 is joined to the outside of the rocker outer panel 30 in the vehicle width direction. A roof side rail 34 extending along the vehicle front-rear direction is disposed on the upper side of the center pillar 14. The roof side rail 34 includes a roof side rail outer panel 36 having a cross-sectional hat shape disposed on the outer side in the vehicle width direction, and a roof side rail inner panel 38 having a cross-sectional hat shape disposed on the inner side in the vehicle width direction. The side rail outer panel 36 and the roof side rail inner panel 38 form a closed cross section. The upper end portion of the center pillar 14 is joined to the outer side in the vehicle width direction of the roof side rail outer panel 36.

  Next, the operation and effect of this embodiment will be described.

  As shown in FIG. 4 (A), the lower side of the center pillar 14 having a curvature such that the upper part in the axial direction is curved inward in the vehicle width direction with respect to the lower part in the axial direction, When a load is input from (direction), the lower part of the center pillar 14 tends to fall inward in the vehicle width direction. At that time, as shown in FIG. 4B, the reinforcement 20 provided in the closed section of the center pillar 14 is deformed in a direction in which the R shape increases (curvature decreases) as indicated by the arrow D direction. A bending moment is applied. As a result, as shown in FIG. 5, the pair of extending portions 20 </ b> B provided at both end portions 20 </ b> A of the reinforcement 20 falls inward (deforms in a direction in which the pair of extending portions 20 </ b> B are close to each other), and the inner panel 18. It hits the wall portion 24A provided inside the inner wall surface. For this reason, the further deformation | transformation (falling down) of the extension part 20B of the reinforcement 20 is suppressed, and the rapid fall of the yield strength of the reinforcement 20 can be suppressed.

  On the other hand, when the wall portion 24A is not provided inside the inner wall surface of the inner panel 18, the reinforcement 20 has a bending moment in the direction of arrow D (see FIG. 4) as shown in FIGS. If it acts, it will deform | transform so that a pair of extension part 20B provided in the both ends 20A of the reinforcement 20 may fall down inside. FIG. 7 shows the relationship (FS curve) between the proof stress F and the stroke of the reinforcement 20. 6A shows a case where the stroke of the reinforcement 20 in FIG. 7 is 0, and FIG. 6B shows a case where the stroke of the reinforcement 20 in FIG. (C) is a case where the stroke of the reinforcement 20 in FIG. As shown in these drawings, since the reinforcement 20 is deformed in the direction in which the dimension in the vehicle width direction of the substantially U-shaped cross section increases in the stroke from A to B, the section modulus is large and the proof stress F is reduced. Is small. On the other hand, after the stroke is B, the reinforcement 20 is deformed in a direction in which the dimension of the substantially U-shaped cross section in the vehicle width direction is reduced, so that the section coefficient is reduced and the proof stress F is rapidly reduced.

  On the other hand, in this embodiment, as FIG. 5 shows, it can suppress that the extension part 20B of the reinforcement 20 falls inward. For this reason, as the curve 40 in FIG. 7 shows, the rapid fall of the yield strength F of the reinforcement 20 can be suppressed.

Further, in this embodiment, since the wall portion 24A provided on the inner wall surface of the inner panel 18 can suppress the collapse of the both ends 20A of the reinforcement, it is not necessary to provide other deformation suppressing members, and the cost can be reduced. It is possible to avoid the increase in weight.
Moreover, the reinforcement 20 can be shape | molded with a high-tensile steel plate. By forming the reinforcement 20 with a high-strength steel plate, the effect of suppressing deformation when the extended portion 20B of the reinforcement 20 hits the wall portion 24A of the inner panel 18 is greater than that of a general steel plate.

  In the present embodiment, the wall portions 24A and 24B are provided at positions facing both sides in the plate thickness direction of the extending portion 20B of the reinforcement 20, but the upper portion in the axial direction is on the inner side in the vehicle width direction with respect to the lower portion in the axial direction. When a bending moment in the direction of arrow D acts on the reinforcement 20 having a curvature that curves, the pair of extending portions 20B of the reinforcement 20 is deformed so as to fall inside the substantially U-shaped cross section. For this reason, the structure which provides only wall part 24A facing the inner side of the extension part 20B in the plate | board thickness direction may be sufficient.

  In the present embodiment, the position of the wall portion 24A is set so as to hit the wall portion 24A when the extending portion 20B of the reinforcement 20 is deformed in a substantially right angle direction. You may set the position of a wall part so that the part 20B may contact | win a wall part when it deform | transforms a little inside.

  [Second Embodiment]

  Hereinafter, a second embodiment of the vehicle reinforcing structure according to the present invention will be described with reference to FIGS. In addition, about the same component as 1st Embodiment mentioned above, the same number is attached | subjected and the description is abbreviate | omitted.

  FIG. 8 shows a side view of the front side member to which the vehicle reinforcing structure is applied. As shown in this figure, front side members 50 extending along the vehicle front-rear direction are provided on both sides of the front portion of the vehicle in the vehicle width direction. A front portion 52 of the front side member 50 is disposed in the engine room, and a rear portion 54 of the front side member 50 extends along the lower surface of the floor panel 59 toward the vehicle rear side. The front portion 52 and the rear portion 54 of the front side member 50 are offset in the vertical direction, and the space between the front portion 52 and the rear portion 54 of the front side member 50 is along the lower surface of the inclined portion 58A of the dash panel 58. The kick portion 56 is inclined toward the lower rear side of the vehicle. Further, front cross members 60 and 62 are provided below the front portion 52 of the front side member 50 and the front end portion 56A of the kick portion 56, respectively.

  The kick portion 56 has a curvature in the axial direction (longitudinal axis direction), and the front end portion 56A of the kick portion 56 has a generally "<" shape from the front in the axial direction to the rear in the axial direction from the upper side to the lower side. It is formed to be curved. Further, the rear end portion 56B of the kick portion 56 is formed so that the rear portion in the axial direction from the front portion in the axial direction is curved in a substantially “<” shape in the opposite direction to the front end portion 56A from the upper side to the lower side. .

  FIG. 9 is a longitudinal sectional view taken along line BB in FIG. As shown in this figure, the kick portion 56 includes a lower panel 64 disposed on the vehicle lower side (vehicle outer side) and a front floor panel 66 disposed on the vehicle upper side (vehicle inner side). The lower panel 64 has a substantially hat-shaped cross section, and a pair of left and right flange portions 16A in the vehicle width direction are spot-welded to a pair of left and right mounting portions 66A of the front floor panel 66, so that the lower panel 64 and the front floor The panel 66 forms a closed cross section. The intermediate portion 64B of the lower panel 64 has a substantially U-shaped cross section that protrudes toward the vehicle lower side.

  A reinforce 68 having substantially the same curvature as the lower panel 64 is disposed in the axial direction in the closed cross section of the kick portion 56. The reinforcement 68 has a substantially U-shaped cross section that protrudes toward the vehicle lower side. Extending portions 68 </ b> B extending to positions close to the inner wall surface (the inner wall surface on the vehicle lower side) in the closed section of the front floor panel 66 are provided at both end portions 68 </ b> A of the reinforcement 68. On the inner wall surface of the front floor panel 66 on the vehicle lower side, a recess 70 that is recessed toward the vehicle upper side is formed along the vehicle front-rear direction at a position facing the extending portion 68B. The recess 70 includes a wall portion 70 </ b> A formed outside the substantially U-shaped cross section of the reinforcement 68 and a substantially U-shaped cross section of the reinforcement 68 at a position facing the thickness direction of the extending portion 68 </ b> B of the reinforcement 68. And a wall portion 70B formed inside. Furthermore, the recessed part 70 is provided with the bottom part 70C arrange | positioned in the direction orthogonal to wall part 70A and wall part 70B in the position facing the end surface of the extension part 68B. The wall portion 70A and the wall portion 70B are substantially planar, and are respectively provided along the vehicle front-rear direction on the inner side and the outer side of the extending portion 68B in the vehicle width direction.

  Next, the operation and effect of this embodiment will be described.

  When a load is input from the front side of the vehicle to the front side member 50 at the time of a front collision, the kick portion 56 having a curvature in the axial direction receives a bending moment and tends to deform. At that time, the front end portion 56A of the kick portion 56 has such a curvature that the axial rear portion is curved in a substantially “<” shape from the upper side to the lower side. As shown, a bending moment is applied to the reinforcement 68 provided in the kick portion 56 so as to be deformed in the direction of decreasing the R shape (increasing the curvature) as indicated by an arrow E. As a result, as indicated by a two-dot chain line in FIG. 9, the pair of extending portions 68B provided at both end portions 68A of the reinforcement 68 falls outward (deforms in a direction in which the pair of extending portions 68B separate). This corresponds to the wall portion 70 </ b> A provided outside the inner wall surface of the front floor panel 66. For this reason, the further deformation | transformation (falling down) of the extension part 68B of the reinforcement 68 is suppressed, and the rapid fall of the yield strength of the reinforcement 68 can be suppressed.

  On the other hand, when the wall portion 70A is not provided on the outer side of the inner wall surface of the front floor panel 66, a pair of extending portions provided at both end portions 68A of the reinforcement 68 as shown in FIGS. The part 68B is deformed so as to fall outward. For this reason, as shown in FIG. 12, after the stroke A, the proof stress F of the reinforce 68 rapidly decreases. On the other hand, in this embodiment, as shown in FIG. 9, the extended portion 68 </ b> B of the reinforcement 68 can be prevented from falling outward, and a sudden decrease in the proof strength F of the reinforcement 20 can be suppressed. can do.

  In addition, the rear end portion 56B of the kick portion 56 has a curvature such that the rear portion in the axial direction from the front portion in the axial direction curves from the upper side to the lower side in a substantially “<” shape in the opposite direction to the front end portion 56A. Therefore, a bending moment is applied to the reinforcement 68 provided inside the kick portion 56 so as to be deformed in a direction in which the R shape increases (curvature decreases) (see FIG. 4B). As a result, the pair of extending portions 68B provided at both end portions 68A of the reinforcement 68 falls inward (deforms in a direction in which the pair of extending portions 68B are close to each other), and is provided inside the inner wall surface of the front floor panel 66. It hits the wall portion 70B. For this reason, the further deformation | transformation (falling down) of the extension part 68B of the reinforcement 68 is suppressed, and the rapid fall of the yield strength of the reinforcement 68 can be suppressed. That is, in this embodiment, even when the extending portion 68B of the reinforcement 68 is deformed in the reverse direction depending on the position of the kick portion 56, further deformation (falling down) of the extending portion 68B can be suppressed.

Further, in the present embodiment, the wall portions 70A and 70B provided on the inner wall surface of the front floor panel 66 can suppress the fall-down of the both end portions 68A of the reinforcement. Cost can be reduced.
Further, the reinforcement 68 can be formed of a high-tensile steel plate. By forming the reinforcement 68 with a high-strength steel plate, the effect of suppressing deformation when the extended portion 68B of the reinforcement 68 hits the wall portions 70A and 70B of the front floor panel 66 is greater than that of a general steel plate.

  [Supplementary explanation of the embodiment]

  In each embodiment mentioned above, although the wall part was provided in the position which opposes the whole extension part (axial direction) of the reinforcement, if it is the structure which can suppress a deformation | transformation of the both ends of a reinforcement, the axial direction of an extension part You may provide a wall part in at least one part.

  In each embodiment mentioned above, although the wall part was provided in the position which adjoins and opposes the extension part of reinforcement, you may provide a wall part so that it may contact | abut to an extension part.

In the second embodiment described above, the vehicle reinforcement structure of the present invention is applied to the kick portion of the front side member. However, the present invention is not limited to this, and the vehicle reinforcement structure of the present invention can also be applied to the rear floor side member.
The high-tensile steel plate of the present invention is a high-tensile steel plate including an ultra-high-strength steel plate. The higher the strength of the reinforcement, the greater the effect of suppressing deformation relative to a general steel sheet.

It is a perspective view which shows the whole center pillar structure used with the vehicle reinforcement structure which concerns on 1st Embodiment. It is a perspective view which shows the center pillar shown by FIG. FIG. 3 is a transverse sectional view taken along line AA in FIG. 2. (A) is a perspective view which shows the direction where a load acts on the center pillar shown in FIG. 3 at the time of a side collision, (B) is a perspective view which shows the direction of the bending moment which acts on reinforcement. It is a cross-sectional view which shows the state which the extension part of the reinforcement deform | transformed at the time of a side collision. (A)-(C) are the cross-sectional views which show typically the state which the extension part of the reinforcement which concerns on proportionality deform | transformed. It is a graph which shows the FS curve of contrast and the reinforcement which concerns on 1st Embodiment. It is a perspective view which shows the whole structure of the kick part of the front side member used with the vehicle reinforcement structure which concerns on 2nd Embodiment. It is a longitudinal cross-sectional view along the AA line of FIG. It is a perspective view which shows the direction of the bending moment which acts on reinforcement when a load acts on the front-end part of a kick part at the time of a front collision. (A) And (B) is a longitudinal cross-sectional view which shows typically the state which the extension part of the reinforcement which concerns on contrast was deformed. It is a graph which shows the FS curve of the reinforcement which concerns on contrast.

Explanation of symbols

14 Center pillar 16 Outer panel (first panel member)
18 Inner panel (second panel member)
20 Reinforce 20A Both ends 20B Extension part 24A Wall part 24B Wall part 50 Front side member 56 Kick part 56A Front end part 56B Rear end part 64 Lower panel (first panel member)
66 Front floor panel (second panel member)
68 Reinforce 68A Both Ends 68B Extension 70A Wall 70B Wall

Claims (6)

In a closed cross section formed by a first panel member on the vehicle outer side having a curvature in the longitudinal axis direction and a second panel member disposed on the vehicle inner side than the first panel member, the first panel member and A vehicle reinforcing structure provided with a reinforcement having substantially the same curvature and joined to the first panel member,
The reinforcement has a substantially U-shaped cross section, and an extended portion provided by extending both end portions to a position in contact with or close to the inner wall surface in the closed cross section of the second panel member. Prepared,
A vehicle reinforcing structure, wherein a wall portion is provided at least at a part of the inner wall surface of the second panel member facing the extending portion in the plate thickness direction.   The said 1st panel member is an outer panel, the said 2nd panel member is an inner panel, The pillar extended along a vehicle up-down direction is comprised by the said outer panel and the said inner panel. The vehicle reinforcement structure according to 1.   The first panel member is a lower panel, the second panel member is a floor panel, and the lower panel and the floor panel constitute a kick member of a side member extending along the vehicle front-rear direction. The vehicle reinforcing structure according to claim 1.   The vehicle reinforcing structure according to any one of claims 1 to 3, wherein the wall portion is provided inside a substantially U-shaped cross section of the reinforcement.   The vehicle reinforcement structure according to any one of claims 1 to 3, wherein the wall portion is provided outside a substantially U-shaped cross section of the reinforcement.   The vehicle reinforcement structure according to any one of claims 1 to 5, wherein the reinforcement is formed of a high-tensile steel plate.

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