JP6961524B2 - Vehicle front pillar reinforcement structure - Google Patents

Description

The present invention relates to a front pillar reinforcing structure of a vehicle in which a reinforcement extending in the axial direction of the front pillar is provided inside a front pillar having a closed cross-sectional structure formed by an inner panel and an outer panel.

In the vehicle front structure, the rocker is located behind the front tires, and the front side members extend upward from the front end portion of the rocker and also extend forward of the front pillars and the passenger interior side of the rocker. .. In the vehicle front structure, the suspension tower is coupled to the front side member at a portion of the front side member in front of the front pillar. On the cowl top side, the front end is connected to the suspension tower and the rear end is connected to the lower end of the front pillar. The front end of the front pillar is connected to the roof side rail.

For example, in the case of an offset collision of a vehicle, when an impact load is input to the front pillar, the impact load acts as a load for bending the front pillar in the vertical direction. In the front pillar, a compressive force acts on the inside of the bending deformation, and a tensile force acts on the outside of the bending deformation. Then, the front pillar is likely to be bent to the outside of the bending deformation on which the tensile force acts. Therefore, for example, in Patent Document 1, reinforcement is arranged on the closed cross section of the front pillar to improve the strength of the front pillar against bending and suppress bending deformation.

Japanese Unexamined Patent Publication No. 2016-68729

By the way, in the minute lap collision, the impact load input to the front pillar tends to be larger than that in the offset collision, and it is further desired to suppress the bending deformation of the front pillar.

An object of the present invention is to provide a vehicle front pillar reinforcing structure capable of suppressing bending deformation of the front pillar at the time of a minute lap collision.

In order to solve the above problems, the front pillar reinforcement structure of the vehicle has reinforcement inside the front pillar forming a closed cross-sectional structure by the inner panel and the outer panel so as to extend along the axial direction of the front pillar. It is a front pillar reinforcing structure of a vehicle provided, and the outer panel has an outer panel main body portion that opens inward in the vehicle width direction in a cross section orthogonal to the axial direction of the front pillar, and extends from the lower end of the outer panel main body portion. A lower wall having a lower flange portion provided and an upper flange portion extending from the upper end of the outer panel main body portion, and a lower wall extending from the lower flange portion in the vehicle width direction to the lower portion of the outer panel main body portion. The reinforcement has a main body portion that opens inward in the vehicle width direction in a cross section orthogonal to the axial direction of the front pillar, and extends from the lower end of the main body portion to include the lower flange. It has a lower coupling portion that is coupled to the portion and an upper coupling portion that extends from the upper end of the main body portion and is coupled to the upper flange portion, and the lower portion of the main body portion is in the axial direction of the front pillar. It is provided with a bottom wall portion along the lower wall portion of the outer panel extending along the line, and is bent so as to form ridge lines extending along the axial direction of the front pillar at both ends of the bottom wall portion. The gist is that the main body portion has a flat plate portion that linearly connects the bottom wall portion and the upper joint portion.

According to this, when an impact load is input to the front pillar at the time of a minute lap collision, the impact load acts as a load for bending the front pillar in the vertical direction. In the front pillar, a compressive force acts on the lower part inside the bending deformation, and a tensile force acts on the upper part outside the bending deformation. At the lower part of the front pillar, the structure having a plurality of ridges provided at the lower part of the reinforcement enhances the strength against the compressive force and suppresses buckling due to compression. In the upper part of the reinforcement where the tensile force acts, the flat plate portion is connected to the upper joint portion, so that only a ridge line is formed at the boundary with the flat plate portion in the vicinity of the upper joint portion, and other ridge lines are formed. However, multiple ridgelines are not formed. Therefore, even if a pulling force is applied, deformation such that the reinforcement bulges upward is suppressed, and bending of the front pillar can be suppressed.

Further, the front pillar reinforcing structure of the vehicle is further provided with an outer reinforcement arranged between the reinforcement and the outer panel, and the outer reinforcement is an outer reinforcement bottom wall portion along the lower wall portion of the outer panel. And an outer reinforcement upper wall portion along the upper wall portion connected to the upper flange portion of the outer panel, and the front is provided at both ends of the outer reinforcement bottom wall portion and both ends of the outer reinforcement upper wall portion. It may be bent so as to form a ridge line extending along the axial direction of the pillar.

According to this, the inner reinforcement increases the strength against the load of bending the front pillar in the vertical direction and suppresses the bending of the front pillar, and the outer reinforcement increases the strength against the compressive force, and the upper and lower seats of the front pillar are increased. Bending is suppressed.

According to the present invention, bending deformation of the front pillar at the time of a minute lap collision can be suppressed.

The side view which shows the vehicle front structure in embodiment. FIG. 2 is a cross-sectional view of the front pillar on line 2-2 of FIG. Cross-sectional view of the front pillar of the comparative example.

Hereinafter, an embodiment in which the front pillar reinforcing structure of the vehicle is embodied will be described with reference to FIGS. 1 to 3.
In each figure, the front and the rear mean the front-rear direction of the vehicle, and the inside and the outside mean the inside and the outside of the vehicle (cabin). Further, in the following description, the inside and the outside mean the vehicle interior side and the vehicle interior outside.

As shown in FIG. 1, the front skeleton structure 10 of the vehicle includes a side sill 12 located behind the front tire 11, a front pillar 20, a front side member 30, a suspension tower 31, and a cowl top side 32.

The front pillar 20 extends diagonally rearward from the front end portion of the side sill 12 upward. The front side member 30 extends forward of the front pillar 20 on the vehicle interior side of the front pillar 20 and the side sill 12. The front side member 30 is coupled with an underlin force (not shown).

The suspension tower 31 is connected to the front side member 30 at a portion of the front side member 30 in front of the front pillar 20. The front end of the cowl top side 32 is connected to the suspension tower 31, and the rear end of the cowl top side 32 is connected to the front pillar 20. The front end portion of the roof side rail 14 constituting the roof side frame 13 of the vehicle together with the front pillar upper of the front pillar 20 is joined to the rear end portion of the front pillar 20 at the bent portion 13a of the roof side frame 13.

Next, the front pillar 20 will be described in detail. The following description is about the front pillar upper of the front pillar 20. As shown in FIG. 2, the front pillar 20 of the front skeleton structure 10 of the vehicle has a closed cross-sectional structure. The front pillar 20 has an inner panel 21 made of a metal plate and an outer panel 22 made of a metal plate. The inner panel 21 has an inner panel main body 21a having a U-shaped cross section orthogonal to the longitudinal direction (axial direction of the front pillar 20). Further, the inner panel 21 extends from the upper end of the inner panel main body 21a, and extends from the upper flange 21b bent with respect to the inner panel main body 21a and the lower end of the inner panel main body 21a. It has a lower flange portion 21c that is bent with respect to the inner panel main body portion 21a. The inner panel main body 21a opens outward in the vehicle width direction in a cross section orthogonal to the axial direction of the front pillar 20, and opens toward the outside of the vehicle interior.

The outer panel 22 has an outer panel main body 23. The outer panel 22 extends from the lower end of the outer panel main body 23, extends from the lower flange portion 24 bent with respect to the outer panel main body 23, and extends from the upper end of the outer panel main body 23, and extends to the outer panel main body 23. It has an upper flange portion 25 that is bent relative to the upper flange portion 25. The outer panel main body 23 opens inward in the vehicle width direction in a cross section orthogonal to the axial direction of the front pillar 20, and opens toward the vehicle interior side.

The outer panel main body 23 has a shape in which a crank-shaped lower wall portion 23a extending along the axial direction of the front pillar 20 is provided below the outer panel main body 23. The lower wall portion 23a is formed by bending the lower portion of the outer panel main body portion 23 so as to have ridge lines L1 and L2 extending along the axial direction of the front pillar 20. The ridge line L1 is a ridge line located closer to the lower flange portion 24, and the ridge line L2 is a ridge line located outside the ridge line L1. Therefore, the lower wall portion 23a is bent at two points.

The outer panel main body 23 has a shape in which a flat plate-shaped upper wall portion 23b extending along the axial direction of the front pillar 20 is provided above the outer panel main body 23. The upper wall portion 23b is formed by bending the upper portion of the outer panel main body portion 23 so as to have ridge lines K1 and K2 extending along the axial direction of the front pillar 20. The ridge line K1 is a ridge line located closer to the upper flange portion 25, and the ridge line K2 is a ridge line located outside the ridge line K1. Therefore, the upper wall portion 23b is bent at two points.

Two reinforcements are arranged inside the front pillar 20. The two reinforcements are an inner reinforcement 41 arranged closer to the inner panel 21 and an outer reinforcement 51 arranged between the inner panel 41 and the outer panel 22.

The inner reinforcement 41 and the outer reinforcement 51 are made of a metal plate, and the cross-sectional view orthogonal to the axial direction of the front pillar 20 is substantially U-shaped. The lengths of the inner reinforcement 41 and the outer reinforcement 51 extend in the axial direction of the front pillar 20.

The inner reinforcement 41 has a substantially inverted L-shape in cross-sectional view orthogonal to the longitudinal direction (the axial direction of the front pillar 20), and opens (inward in the vehicle width direction) toward the inner panel main body 21a of the inner panel 21. It has a main body portion 42. Further, the inner reinforcement 41 is provided with a lower connecting portion 43 that extends from the lower end of the main body portion 42 and is bent with respect to the main body portion 42. The lower coupling portion 43 is coupled to the lower flange portion 21c of the inner panel 21 and the lower flange portion 24 of the outer panel 22. Further, the inner reinforcement 41 is provided with an upper connecting portion 44 that extends from the upper end of the main body portion 42 and is bent with respect to the main body portion 42. The upper coupling portion 44 is coupled to the upper flange portion 21b of the inner panel 21 and the upper flange portion 25 of the outer panel 22.

The main body portion 42 of the inner reinforcement 41 includes a flat plate-shaped bottom wall portion 45 along the portion between the lower flange portion 24 and the ridge line L1 in the lower wall portion 23a of the outer panel 22. As shown in FIG. 2, the bottom wall portion 45 extends from the lower connecting portion 43 from the inner panel 21 toward the outer panel 22, and in the present embodiment, the vehicle extends from the lower connecting portion 43 along the vehicle width direction. It extends to the outside of the room. Further, the bottom wall portion 45 extends along the axial direction of the front pillar 20. The main body 42 of the inner reinforcement 41 includes a flat plate 46 that connects the bottom wall 45 and the upper joint 44. Therefore, the inner reinforcement 41 has a ridge line N1 at the boundary between the bottom wall portion 45 and the flat plate portion 46, and has a ridge line N2 at the boundary between the bottom wall portion 45 and the lower connecting portion 43. Therefore, the inner reinforcement 41 is formed by bending so that a plurality of ridge lines extending along the axial direction of the front pillar 20 are formed at both ends of the bottom wall portion 45. That is, the inner reinforcement 41 has a shape provided with a plurality of ridge lines on the bottom wall portion 45 side of the main body portion 42. As shown in the cross-sectional view of FIG. 2, the bottom wall portion 45 of the main body portion 42 of the inner reinforcement 41 extends in the vehicle width direction so that the ridge line N1 is close to the outer panel 22.

As shown in FIG. 2, in a cross-sectional view orthogonal to the axial direction of the front pillar 20, the flat plate portion 46 extends linearly so as to connect between the bottom wall portion 45 and the upper connecting portion 44. In the inner reinforcement 41, the smaller angle of the angle formed by the connecting portion between the flat plate portion 46 and the upper connecting portion 44 is an obtuse angle. The connecting portion between the flat plate portion 46 and the upper connecting portion 44 is formed in a shape in a cross-sectional view. Therefore, the upper portion of the flat plate portion 46 of the inner reinforcement 41 is not provided with the bottom wall portion 45 as in the lower portion, and the number of ridge lines is smaller than that of the lower portion. In this embodiment, one ridgeline is formed by one bent portion. Depending on the shape of the upper flange portions 21b and 25, the inner reinforcement 41 is connected so that the flat plate portion 46 and the upper connecting portion 44 are connected in a straight line without providing a bent portion in a U shape. May be configured. In this case, the number of ridges is even smaller.

As shown in FIG. 2, the outer reinforcement 51 has a main body portion 52 that opens toward the inner reinforcement 41 in a cross-sectional view orthogonal to the axial direction (longitudinal direction) of the front pillar 20. Further, the outer reinforcement 51 includes a first coupling portion 53 that extends from the lower end of the main body portion 52 and is bent with respect to the main body portion 52. The first coupling portion 53 is coupled to the lower flange portion 21c of the inner panel 21 and the lower flange portion 24 of the outer panel 22. The outer reinforcement 51 includes a second coupling portion 54 that extends from the upper end of the main body portion 52 and is bent with respect to the main body portion 52. The second coupling portion 54 is coupled to the upper flange portion 21b of the inner panel 21 and the upper flange portion 25 of the outer panel 22.

The main body 52 of the outer reinforcement 51 is a flat plate-shaped outer along the lower wall 23a of the outer panel 22 between the lower flange 24 and the ridge line L1 and the bottom wall 45 of the inner reinforcement 41. A ridge bottom wall portion 55 is provided. The outer reinforcement bottom wall portion 55 extends from the inner panel 21 toward the outer panel 22 from the first joint portion 53, and in the present embodiment, extends from the first joint portion 53 to the outside of the vehicle interior along the vehicle width direction. There is. Further, the outer reinforcement bottom wall portion 55 extends along the axial direction of the front pillar 20. Further, the main body portion 52 of the outer reinforcement 51 includes an extension portion 56 that extends obliquely from the outer reinforcement bottom wall portion 55.

Further, the main body portion 52 of the outer reinforcement 51 includes a U-shaped portion 57 located between the second joint portion 54 and the extension portion 56. The U-shaped portion 57 has a shape that opens toward the inner reinforcement 41.

The main body 52 of the outer reinforcement 51 has a ridge M1 at the boundary between the outer reinforcement bottom wall 55 and the extension 56, and has a ridge M2 at the boundary between the outer reinforcement bottom wall 55 and the first joint 53. Have. Therefore, the outer reinforcement 51 is formed by bending so that a plurality of ridge lines extending along the axial direction of the front pillar 20 are formed at both ends of the outer reinforcement bottom wall portion 55. Further, the main body portion 52 has a ridge line M3 at the boundary between the extending portion 56 and the U-shaped portion 57. The outer reinforcement 51 has a shape provided with a plurality of ridges on the outer reinforcement bottom wall portion 55 side of the main body portion 52. Therefore, the main body 52 is bent at three points on the lower side.

The main body 52 of the outer reinforcement 51 includes a flat plate-shaped outer reinforcement upper wall 58 along the upper wall 23b of the outer panel 22. The outer reinforcement upper wall portion 58 extends from the second joint portion 54 toward the outer panel 22, and in the present embodiment, extends from the second joint portion 54 to the outside of the vehicle interior along the vehicle width direction. Further, the outer reinforcement upper wall portion 58 extends along the axial direction of the front pillar 20.

The main body 52 of the outer reinforcement 51 has ridges R1 and R2 extending along the axial direction of the front pillar 20 at both ends of the outer reinforcement upper wall 58. Therefore, the outer reinforcement 51 is formed by bending so that a plurality of ridge lines extending along the axial direction of the front pillar 20 are formed at both ends of the outer reinforcement upper wall portion 58. That is, the outer reinforcement 51 has a shape provided with a plurality of ridge lines on the outer reinforcement upper wall portion 58 side of the main body portion 52.

Therefore, the main body 52 is provided with two ridges on the upper side and two bent portions, and is provided with three ridges on the lower side and three bent portions.
The ridges N1 and N2 of the inner reinforcement 41 and the ridges M1, M2 and M3 of the outer reinforcement 51 are located below the cross-sectional center P of the closed cross-sectional structure of the front pillar 20.

Next, the operation of the front pillar reinforcing structure of the vehicle will be described.
As shown in FIG. 1, one of the load transmission paths from the micro lap barrier 50 at the time of a micro lap collision is a path in which the impact load is transmitted from the micro lap barrier 50 to the front pillar 20 via the cowl top side 32. be. When the impact load is input to the front pillar 20, the impact load acts as a load for bending the front pillar 20 (front pillar upper) in the vertical direction. In the front pillar 20, as shown by arrow Y1, a compressive force acts on the lower part inside the bending deformation, and as shown by arrow Y2, a tensile force acts on the upper part outside the bending deformation.

As shown in FIG. 2, on the lower side of the front pillar 20, the bottom wall portion 45 side of the inner reinforcement 41 has a structure having ridge lines N1 and N2, and the outer reinforcement bottom wall portion 55 side of the outer reinforcement 51 has a ridge line. It is a structure having M1, M2, and M3. Therefore, the inner reinforcement 41 and the outer reinforcement 51 increase the strength against the compressive force and suppress the buckling of the front pillar 20.

As shown in FIG. 3, as the main body portion 72 of the inner reinforcement 71 of the comparative example, the bottom wall portion 75, the first plate portion 76 extending diagonally from the bottom wall portion 75, and the first plate portion 76. The shape has a second plate portion 77 extending from the upper end toward the upper joint portion 74. The inner reinforcement 71 of the comparative example has a lower joint portion 73 and an upper joint portion 74, similarly to the inner reinforcement 41 of the embodiment. Then, in the inner reinforcement 71 of the comparative example, at both ends of the second plate portion 77 on the upper part of the main body portion 72 on which the tensile force acts, the boundary between the first plate portion 76 and the second plate portion 77 and the second plate portion A ridge line T is provided at the boundary between the 77 and the upper joint portion 74, and a bent portion is provided. Therefore, the inner reinforcement 71 of the comparative example has a shape in which more bent portions (ridge lines) are set at the upper portion than the inner reinforcement 41 of the embodiment.

When a tensile force acts on the upper part of the inner reinforcement 71 of the comparative example at the time of a minute lap collision, the ridge line T between the upper joint portion 74 and the second plate portion 77, and the first plate portion 76 and the second plate portion 77 A deformation occurs in which the second plate portion 77 bulges upward from the vicinity of the ridge line T between the two plates, and the cross-sectional shape of the inner reinforcement 71 is liable to collapse. Similarly, when a tensile force acts on the upper portion of the outer reinforcement 51, the outer wall portion 58 is deformed to bulge upward, and the cross-sectional shape of the outer reinforcement 51 is likely to collapse. When the cross-sectional shapes of the inner reinforcement 41 and the outer reinforcement 51 are deformed, the front pillar 20 is easily bent.

On the other hand, as shown in FIG. 2, in the upper part of the inner reinforcement 41 of the embodiment, a linear flat plate portion 46 is connected to the upper joint portion 44, so that a plurality of ridge lines (bending) are formed in the vicinity of the upper joint portion 44. Part) is not formed. Therefore, even if a tensile force acts, the inner reinforcement 41 is suppressed from being deformed so that the inner reinforcement 41 bulges upward and the cross-sectional shape is deformed, and the bending of the front pillar 20 is suppressed.

Further, the structure has ridge lines R1 and R2 at both ends of the outer reinforcement upper wall portion 58 of the outer reinforcement 51, and includes bent portions. Therefore, the outer reinforcement 51 increases the strength against the compressive force and suppresses the buckling of the upper part of the front pillar 20.

According to the above embodiment, the following effects can be obtained.
(1) In the inner reinforcement 41, the bottom wall portion 45 and the upper connecting portion 44 are connected by a flat plate portion 46 extending in a straight line. Therefore, a plurality of ridge lines (bent portions) are not formed in the vicinity of the upper connecting portion 44. Therefore, even if a tensile force acts on the upper part of the inner reinforcement 41, the deformation such that the main body portion 42 swells in the vicinity of the upper part of the inner reinforcement 41 is suppressed, and the bending of the front pillar 20 can be suppressed. As a result, it is possible to suppress the amount of deformation of the lower part of the front pillar 20 to the rear of the vehicle due to bending of the front pillar 20 at the time of a minute lap collision.

(2) In the inner reinforcement 41, since the bottom wall portion 45 side (lower side) on which the compressive force acts is provided with ridge lines N1 and N2, the lower portion of the inner reinforcement 41 buckles due to the compressive force. Can be suppressed, and buckling of the bottom wall portion 45 side (lower side) of the front pillar 20 can be suppressed.

(3) The ridge line N1 located at the end of the bottom wall portion 45 of the inner reinforcement 41 is brought close to the outer panel 22. Therefore, the extending length of the bottom wall portion 45 from the lower connecting portion 43 can be lengthened to increase the strength against the compressive force.

(4) The front pillar 20 includes an outer reinforcement 51 in addition to the inner reinforcement 41. The inner reinforcement 41 can suppress bending in the vertical direction at the time of a minute lap collision. Further, the outer reinforcement 51 is provided with a plurality of ridge lines R1 and R2 on the outer reinforcement upper wall portion 58 side, and is provided with a plurality of ridge lines M1, M2 and M3 on the outer reinforcement bottom wall portion 55 side as well. Therefore, the outer reinforcement 51 increases the strength against the compressive force, and buckling of the upper and lower parts of the front pillar 20 is suppressed.

(5) The ridgelines N1 and N2 of the inner reinforcement 41 and the ridges M1, M2 and M3 of the outer reinforcement 51 are located below the cross-sectional center P of the front pillar 20. Therefore, it is possible to prevent the lower side of the front pillar 20 on which the compressive force acts from buckling due to the compressive force.

(6) By simply changing the shape of the inner reinforcement 41, it is possible to suppress bending of the front pillar 20 without increasing the reinforcement or increasing the thickness of the inner reinforcement 41 or the outer panel 22.

The above embodiment may be changed as follows.
○ The main body portion 52 of the outer reinforcement 51 may be configured to include a flat plate portion between the outer reinforcement bottom wall portion 55 and the second joint portion 54.

○ The reinforcing structure of the front pillar 20 does not have to be provided with the outer reinforcement 51, and may be configured to include only the inner reinforcement 41.
○ In the inner reinforcement 41, if the ridge line is located below the center P of the cross section, the number of ridge lines on the lower side may be changed as appropriate.

○ The upper connecting portion 44 of the inner reinforcement 41 may have a shape having a ridge line.

N1, N2 ... Ridge line, M1, M2 ... Ridge line, R1, R2 ... Ridge line, 20 ... Front pillar, 21 ... Inner panel, 21b ... Upper flange part, 21c, 24 ... Lower flange part, 22 ... Outer panel, 23 ... Outer panel Main body, 23a ... Lower wall, 23b ... Upper wall, 41 ... Inner reinforcement, 42 ... Main body, 43 ... Lower joint, 44 ... Upper joint, 45 ... Bottom wall, 46 ... Flat plate, 51 ... Outer Reinforcement, 55 ... Outer Reinforce Bottom Wall, 58 ... Outer Reinforce Upper Wall.

Claims (3)

It is a front pillar reinforcement structure of a vehicle in which reinforcement is provided inside the front pillar forming a closed cross-sectional structure by an inner panel and an outer panel so as to extend along the axial direction of the front pillar.
The outer panel has an outer panel main body portion that opens inward in the vehicle width direction in a cross section orthogonal to the axial direction of the front pillar, a lower flange portion that extends from the lower end of the outer panel main body portion, and the outer panel main body portion. It has an upper flange portion extending from the upper end of the outer panel, and has a lower wall portion extending in the vehicle width direction from the lower flange portion at the lower part of the outer panel main body portion.
The reinforcement has a main body portion that opens inward in the vehicle width direction in a cross section orthogonal to the axial direction of the front pillar, and is a lower side that extends from the lower end of the main body portion and is coupled to the lower flange portion. It has a joint portion and an upper joint portion that extends from the upper end of the main body portion and is coupled to the upper flange portion.
The lower portion of the main body portion includes a bottom wall portion along the lower wall portion of the outer panel extending along the axial direction of the front pillar, and both ends of the bottom wall portion along the axial direction of the front pillar. It is bent so that an extending ridgeline is formed.
The body portion may have a flat plate portion connecting with the bottom wall portion and the upper coupling portion linearly, in a cross section perpendicular to the axial direction of the front pillar, said plate, said bottom from said upper coupling portion The bottom wall portion extends from the lower joint portion to the outside of the passenger compartment as it extends toward the wall portion, and is in the vehicle width direction among the angles formed by the flat plate portion and the bottom wall portion. front pillar reinforcement structure of a vehicle horn, wherein an acute angle der Rukoto formed inside. The upper flange portion is bent so as to form a ridge line at the boundary with the outer panel main body portion, and the upper joint portion is the ridge line located at the boundary between the upper flange portion and the outer panel main body portion. The vehicle front pillar reinforcing structure according to claim 1, which is located closer to the tip of the upper flange portion. Further provided with an outer reinforcement arranged between the reinforcement and the outer panel.
The outer reinforcement includes an outer reinforcement bottom wall portion along the lower wall portion of the outer panel and an outer reinforcement upper wall portion along the upper wall portion connected to the upper flange portion of the outer panel. The first or second aspect of the present invention, wherein the ridges extending along the axial direction of the front pillars are formed at both ends of the bottom wall of the reinforce and both ends of the upper wall of the outer reinforce. Vehicle front pillar reinforcement structure.

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