JP6838529B2 - Vehicle side structure - Google Patents

Description

The present invention relates to a vehicle side structure.

Patent Document 1 discloses an automobile vehicle body in which a cab side inner side frame member and a cab side outer side frame member made of a magnesium-based alloy or an aluminum-based alloy are joined.

Japanese Unexamined Patent Publication No. 2001-287666

A vehicle having a mounted member and a side member outer panel having a linear expansion coefficient larger than the linear expansion coefficient of the mounted member and having a hinge pillar portion formed with a mounting portion and a fragile portion to be mounted on the mounted member. There is a side structure. In this vehicle side structure, when heated in a drying process after painting or the like, the side member outer panel may float with respect to the member to be attached due to the difference in linear expansion coefficient.

Here, when a plurality of mounting portions are formed on the upper and lower sides of the hinge pillar portion in the vertical direction of the vehicle with respect to the fragile portion, the floating of the side member outer panel is suppressed, but the number of parts as the vehicle side structure is increased. More. That is, in the vehicle side structure in which the linear expansion coefficient of the side member outer panel having the mounting portion and the fragile portion is larger than the linear expansion coefficient of the mounted member, the floating of the side member outer panel is suppressed and the increase in the number of parts is suppressed. Has room for improvement.

In consideration of the above facts, the present invention suppresses the floating of the side member outer panel in the vehicle side structure in which the linear expansion coefficient of the side member outer panel having the mounting portion and the fragile portion is larger than the linear expansion coefficient of the mounted member. The purpose is to obtain a vehicle side structure capable of suppressing an increase in the number of parts.

The vehicle side structure according to the invention according to claim 1 includes a mounted member having a coefficient of linear expansion, a mounting portion mounted on the mounted member, and other parts including the mounting portion with respect to thermal stress. It has a hinge pillar portion on which a more fragile fragile portion is formed, has a second linear expansion coefficient larger than the first linear expansion coefficient, and the mounting portion makes the fragile portion in the hinge pillar portion in the panel surface. It has a side member outer panel arranged on the front side or the rear side in the vehicle front-rear direction with respect to the fragile portion inside the projection area projected in the vehicle front-rear direction.
Further, the vehicle side structure according to the invention according to claim 2 is the vehicle side structure according to claim 1, wherein the fragile portion constitutes a peripheral edge of a long hole long in the vertical direction of the vehicle. The mounting portion is arranged on the front side or the rear side in the vehicle front-rear direction of the central portion of the fragile portion in the vehicle vertical direction.

The side member outer panel has a second line expansion coefficient that is larger than the first line expansion coefficient of the attached member. Therefore, when the attached member and the side member outer panel are heated, the amount of deformation of the side member outer panel becomes larger than the amount of deformation of the attached member. In particular, the area around the fragile portion of the hinge pillar portion is more vulnerable to thermal stress than other portions of the hinge pillar portion, so that the side member outer panel is more likely to float with respect to the attached member.

Here, in the invention according to claim 1, the mounting portion is inside the projection area in which the fragile portion in the hinge pillar portion is projected in the vehicle front-rear direction in the panel surface, and is on the front side or the rear side in the vehicle front-rear direction with respect to the fragile portion. It is arranged. For this reason, the side member outer panel is more difficult to separate from the mounted member than the configuration in which the mounting portion is not arranged on the front side or the rear side in the vehicle front-rear direction with respect to the fragile portion. It can be suppressed. Further, in the invention according to claim 1, the number of mounting portions is reduced as compared with the configuration in which the mounting portions are arranged on the upper side and the lower side in the vertical direction of the vehicle with respect to the fragile portion. The number of is reduced. As a result, it is possible to suppress an increase in the number of parts.

In addition, in the invention according to claim 1, in the side member outer panel, a portion of the fragile portion on the front side or the rear side in the vehicle front-rear direction in which the amount of deformation becomes larger than the amount of deformation of other parts when heated. Therefore, the floating of the side member outer panel can be suppressed. As a result, for example, when the sealer is applied between the attached member and the side member outer panel after the side member outer panel is attached to the attached member, the gap between the attached member and the side member outer panel is small, which simplifies the application work of the sealer. At the same time, it is possible to suppress an increase in the amount of the sealer applied.

The present invention suppresses the floating of the side member outer panel and increases the number of parts in the vehicle side structure in which the linear expansion coefficient of the side member outer panel having the mounting portion and the fragile portion is larger than the linear expansion coefficient of the mounted member. It has the effect of being able to be suppressed.

It is a block diagram which shows a part of the vehicle to which the vehicle side structure which concerns on this embodiment is applied. It is an exploded perspective view of the vehicle side structure and the rocker which concerns on this embodiment. It is a partially enlarged view which shows the hinge pillar part of the side member outer panel which concerns on this embodiment. It is sectional drawing which shows the fastening part of the front pillar reinforcement and the side member outer panel which concerns on this embodiment. It is a schematic diagram which shows the measurement point which measures the floating amount of the side member outer panel which concerns on this embodiment. It is a partially enlarged view which shows the hinge pillar part of the side member outer panel which concerns on a comparative example.

FIG. 1 shows a state in which a part of the vehicle 10 according to the present embodiment is viewed from the side. The arrow FR appropriately shown in each figure indicates the front of the vehicle (traveling direction), the arrow UP indicates the upper side of the vehicle, and the arrow OUT indicates the outside in the vehicle width direction. Hereinafter, when the explanation is simply made using the front-rear, up-down, and left-right directions, unless otherwise specified, the front-rear direction of the vehicle front-rear direction, the up-down direction of the vehicle up-down direction, and the left-right direction of the vehicle width direction when facing the traveling direction are shown. Shall be.

The vehicle 10 has a vehicle body 11. The vehicle body 11 includes a rocker 12, a front pillar 16, a center pillar 22, a rear pillar 24, a roof side rail 26, and a vehicle side structure 30.

The rocker 12 shown in FIG. 2 is elongated in the vehicle front-rear direction, and constitutes a skeleton member at the outer end in the vehicle width direction at the lower portion in the vehicle vertical direction. Further, in the rocker 12, when viewed from the front-rear direction of the vehicle, the rocker outer panel 13 having a cross-section hat shape that opens inward in the vehicle width direction and the rocker inner panel 14 having a cross-section hat shape that opens outward in the vehicle width direction have a closed cross section. It is configured to be joined so as to form. The lower portion of the front pillar lower reinforcement 32 and the lower portion of the side member outer panel 34, which will be described later, are overlapped and joined to the rocker outer panel 13 from the outside in the vehicle width direction.

The front pillar 16 shown in FIG. 1 extends to the upper side in the vehicle vertical direction with respect to the rocker 12 at the front portion of the vehicle body 11 in the vehicle front-rear direction. Specifically, the front pillar 16 has an upright portion that stands upright from the rocker 12 along the vertical direction of the vehicle, and an inclined portion that extends obliquely from the upper end of the upright portion to the front end of the roof side rail 26 described later. Here, of the front pillars 16, the upright portion (lower part in the vertical direction of the vehicle) is referred to as a hinge pillar 18.

The hinge pillar 18 includes a front pillar lower reinforcement 32 described later, a front pillar inner panel (not shown), and a hinge pillar portion 52 of a side member outer panel 34 described later. The front pillar lower reinforcement 32 and the front pillar inner panel (not shown) are joined in the vehicle width direction to form a closed cross section, and form a part of the skeleton member of the vehicle 10. A vehicle side structure 30, which will be described later, is applied to the hinge pillar 18.

The center pillar 22 extends substantially upward in the vehicle vertical direction with respect to the rocker 12 at a substantially central portion of the vehicle body 11 in the vehicle front-rear direction. The rear pillar 24 extends upward in the vehicle vertical direction with respect to the rocker 12 at the rear portion of the vehicle body 11 in the vehicle front-rear direction. The roof side rail 26 connects the front pillar 16, the center pillar 22, and the rear pillar 24 in the vertical direction of the vehicle and extends in the front-rear direction of the vehicle. The rocker 12, the front pillar 16, the center pillar 22, and the roof side rail 26 form a front door opening 28 for passengers to get on and off. The front door opening 28 is opened and closed by a front door (not shown).

[Vehicle side structure]
As shown in FIG. 2, the vehicle side structure 30 has a front pillar lower reinforcement 32 (hereinafter, referred to as a front pillar RF 32) as an example of a mounted member, and a side member outer panel 34. The vehicle side structure 30 is symmetrical with respect to the center in the vehicle width direction. Therefore, regarding the vehicle side structure 30, the left side portion of the vehicle will be described, and the description of the right side portion of the vehicle will be omitted.

<Front pillar RF>
The front pillar RF32 is arranged outside the rocker outer panel 13 in the vehicle width direction. A side member outer panel 34, which will be described later, is arranged outside the front pillar RF32 in the vehicle width direction. Further, the front pillar RF32 is made of iron as an example, and has a linear expansion coefficient K1 = 12.1 × 10 ^-6 / ° C as an example of the first linear expansion coefficient. In this embodiment, the value of the coefficient of linear expansion is a value measured by a method according to JIS H7404-1993. Further, the front pillar RF32 is formed in a substantially L shape when viewed from the vehicle width direction. Specifically, the front pillar RF32 includes a lower wall portion 36 extending in the vehicle front-rear direction and a vertical wall portion 38 extending upward in the vehicle vertical direction from the front end portion of the lower wall portion 36 in the vehicle front-rear direction. Have.

The lower wall portion 36 is overlapped with the rocker outer panel 13 from the outside in the vehicle width direction and is joined to the rocker outer panel 13. The vertical wall portion 38 is formed in a cross-sectional hat shape that opens inward in the vehicle width direction when viewed from the vertical direction of the vehicle. Specifically, the vertical wall portion 38 has a base portion 38A, two wall portions 38B, and two flange portions 38C.

The base 38A is formed in a plate shape with the vehicle width direction as the thickness direction, and is arranged along the vehicle front-rear direction and the vehicle vertical direction. Further, the base 38A is formed with a plurality of holes including an insertion hole 42, an insertion hole 44, and a fastening hole 46. The insertion hole 42 penetrates the base 38A in the vehicle width direction at a substantially central portion of the base 38A in the vehicle front-rear direction and the vehicle vertical direction. Further, the insertion hole 42 is an elongated hole whose longitudinal direction is the vertical direction of the vehicle. A wire and a harness (not shown) are inserted into the insertion hole 42.

The insertion hole 44 penetrates the base 38A in the vehicle width direction at a portion of the base 38A on the front side in the vehicle front-rear direction with respect to the insertion hole 42 when viewed from the vehicle width direction. Specifically, the insertion hole 44 is formed at a position that is approximately the same height as the position at substantially the center of the insertion hole 42. A weld nut 64 is provided on the inner side of the base 38A in the vehicle width direction and on the peripheral edge of the insertion hole 44. A bolt 62 (see FIG. 4) is fastened to the weld nut 64. The fastening hole 46 penetrates the base 38A in the vehicle width direction at the lower and upper portions of the base 38A with respect to the insertion hole 42 in the vertical direction of the vehicle. A part of a door hinge member (not shown) that supports the front door described above so as to be openable and closable is fastened to the peripheral portion of the fastening hole 46.

The two wall portions 38B extend inward in the vehicle width direction from both ends of the base portion 38A in the vehicle front-rear direction. One flange portion 38C extends from the inner end in the vehicle width direction to the front side of the front wall portion 38B in the vehicle front-rear direction. The other flange portion 38C extends from the inner end in the vehicle width direction of the rear wall portion 38B to the rear side.

<Side member outer panel>
The side member outer panel 34 shown in FIG. 1 is a large member in which parts constituting a part of each of the rocker 12, the front pillar 16, the center pillar 22, the rear pillar 24, and the roof side rail 26 are integrated by press molding. .. Further, the side member outer panel 34 is a member which is an outer plate of the vehicle 10 and constitutes a design surface.

The side member outer panel 34 is made of aluminum as an example, and has a linear expansion coefficient K2 = 23.0 × 10 ^-6 / ° C as an example of a second linear expansion coefficient. That is, the side member outer panel 34 has a linear expansion coefficient K2 larger than the above-mentioned linear expansion coefficient K1 of the front pillar RF32. In the side member outer panel 34, a portion of the front pillar 16 that constitutes the lower portion of the front pillar 16 in the vehicle vertical direction and is overlapped with the front pillar RF32 from the outside in the vehicle width direction is referred to as a hinge pillar portion 52. In other words, the side member outer panel 34 has a hinge pillar portion 52.

As shown in FIG. 2, the hinge pillar portion 52 is formed with a hole portion 54 as an example of a fragile portion, a fastening portion 56 as an example of a mounting portion, and two hinge fixing portions 57. The two hinge fixing portions 57 are arranged at one location on the upper side and one location on the lower side of the hinge pillar portion 52 in the vertical direction of the vehicle with respect to the hole portion 54. A plurality of fastening holes 65, which are penetrated in the vehicle width direction and to which screws (not shown) are fastened, are formed in the two hinge fixing portions 57. The plurality of fastening holes 65 communicate with the fastening holes 46 in the vehicle width direction. The fixed portion of the hinge member (not shown) is fixed to two hinge fixing portions 57 by fastening.

As shown in FIG. 3, when the hinge pillar portion 52 is viewed from the vehicle width direction, the hinge pillar portion 52 is formed with a through hole 55 penetrating in the vehicle width direction. The through hole 55 is a long hole that is long in the vertical direction of the vehicle. A harness and a wire (not shown) used in the vehicle 10 are inserted into the through hole 55. Here, a portion including the through hole 55 and forming the peripheral edge of the through hole 55 is referred to as a hole portion 54.

(Hole)
The hole portion 54 is a portion that is more vulnerable to thermal stress acting on the hinge pillar portion 52 than other portions including the fastening portion 56 described later of the hinge pillar portion 52. In other words, the hole portion 54 is a portion where the rigidity against thermal stress is lower than that of other portions (parts other than the hole portion 54) of the hinge pillar portion 52. The thermal stress here is generated in the hinge pillar portion 52 when the hinge pillar portion 52 is attached to the front pillar RF32 and heated, and the expansion of the hinge pillar portion 52 due to a temperature change is restrained by the attachment portion. It means stress.

In the hinge pillar portion 52, a virtual region in which the through hole 55 of the hole portion 54 is projected in the vehicle front-rear direction is referred to as a projection area S. In FIG. 3, the projection area S is indicated by an alternate long and short dash line and an oblique line. The fastening portion 56 is not formed in the region inside the projection region S and on the rear side in the vehicle front-rear direction with respect to the hole portion 54. As an example, the shape of the projection area S is a substantially trapezoidal shape with the upper side in the vertical direction of the vehicle as the upper base and the lower side as the lower base when viewed from the vehicle width direction. In other words, in the projection area S, the width of the lower end in the vehicle front-rear direction is longer than the width of the upper end in the vehicle front-rear direction.

(Fastening part)
The fastening portion 56 is a portion that is attached (fastened) to the front pillar RF32 from the outside in the vehicle width direction by using a bolt 62 (see FIG. 4). Further, as an example, the fastening portion 56 is arranged inside the projection region S on the front side in the vehicle front-rear direction with respect to the hole portion 54. Specifically, the fastening portion 56 includes a circular insertion hole 58 that penetrates the hinge pillar portion 52 in the vehicle width direction when viewed from the vehicle width direction, and a substantially annular peripheral edge portion 59 that surrounds the insertion hole 58. Has been done.

Further, as an example, the fastening portions 56 are arranged so as to line up in the vehicle front-rear direction with respect to the central position A in the vehicle vertical direction and the vehicle front-rear direction in the hole portion 54. In addition, the fastening portion 56 is arranged at the front end of the hinge pillar portion 52 in the vehicle front-rear direction as an example.

Fixing portions 61A and 61B fastened to the front pillar RF32 and the rocker 12 (see FIG. 1) using bolts and nuts (not shown) on the lower side (lower end portion) of the side member outer panel 34 in the vertical direction of the vehicle with respect to the fastening portion 56. Is formed. The fixing portion 61A is aligned with the fastening portion 56 in the vertical direction of the vehicle. The fixed portion 61B is arranged on the rear side of the fixed portion 61A in the front-rear direction of the vehicle.

As shown in FIG. 4, the hinge pillar portion 52 of the side member outer panel 34 is overlapped with the base portion 38A of the front pillar RF32 from the outside in the vehicle width direction. In this state, the bolt 62 is inserted into the insertion hole 58 and the insertion hole 44 and fastened to the weld nut 64, so that the hinge pillar portion 52 of the side member outer panel 34 is attached to the front pillar RF32.

In the fastening portion 56 and the peripheral portion of the fastening portion 56, the front pillar RF32 has the outer side surface 32A in the vehicle width direction and the side member outer panel 34 has the inner side surface 34A in the vehicle width direction in an unheated normal temperature (25 ° C.) environment. Are in close contact with each other, and there are almost no gaps. The state of the front pillar RF32 and the side member outer panel 34 at this time is referred to as a non-heated state.

<Comparison example>
FIG. 6 shows the vehicle side structure 200 of the comparative example. The vehicle side structure 200 has a hinge pillar portion 202 in the side member outer panel 34 instead of the hinge pillar portion 52 (see FIG. 3) described above. The hinge pillar portion 202 is formed with a hole portion 54, two fastening portions 204, and two hinge fixing portions 57 (in the figure, one location). Regarding the front pillar RF32, the position of the weld nut 64 (see FIG. 4) has been changed according to the fastening portion 204 described later, but the illustration is omitted.

The two fastening portions 204 are portions that are attached (fastened) to the front pillar RF32 from the outside in the vehicle width direction. Further, the two fastening portions 204 are located in the hinge pillar portion 202 at a position on the upper side in the vehicle vertical direction and the front side in the vehicle front-rear direction with respect to the hole portion 54 and a position on the lower side in the vehicle vertical direction and the front side in the vehicle front-rear direction. It is formed. That is, the two fastening portions 204 are arranged outside the projection area S. In other words, in the vehicle side structure 200 of the comparative example, there is no fastening portion inside the projection region S.

As schematically shown in FIG. 5, three measurement points P1, P2, and P3 are set on the front side in the vehicle front-rear direction with respect to the hole 54 in the side member outer panel 34. Then, CAE (Computer Aided Engineering) analysis was performed on the amount of floating of the side member outer panel 34 with respect to the front pillar RF32 when the front pillar RF32 (see FIG. 6) and the side member outer panel 34 were heated. The heating temperature was set at the temperature of the drying treatment after painting (100 ° C. or higher).

The measurement point P1 is set at a position inside the projection region S and at a position on the front side (front end portion) in the vehicle front-rear direction with respect to the central position A of the hole portion 54. The measurement point P2 is set at a position outside the projection region S, above the vertical direction of the vehicle with respect to the hole 54, and at the front side in the front-rear direction of the vehicle. The measurement point P3 is set at a position outside the projection region S, below the vertical direction of the vehicle with respect to the hole 54, and at the front side in the front-rear direction of the vehicle. Here, as a result of performing the above CAE analysis in the vehicle side structure 200 (see FIG. 6) of the comparative example, the floating amount of the measuring point P1 is 1.02, the floating amount of the measuring point P2 is 0.92, and the measurement is performed. The floating amount of the point P3 was 1.75.

[Action and effect]
Next, the operation and effect of the vehicle side structure 30 of the present embodiment will be described.

In the vehicle side structure 30 shown in FIG. 3, the fastening portion 56 is arranged on the front side in the vehicle front-rear direction with respect to the hole portion 54 inside the projection region S in which the hole portion 54 in the hinge pillar portion 52 is projected in the vehicle front-rear direction. There is. The portion of the hinge pillar portion 52 inside the projection region S is vulnerable to thermal stress acting during heating as compared with other portions because the hole portion 54 is formed. .. The heating includes, for example, heating in a drying treatment after electrodeposition coating.

It is assumed that the front pillar RF32 and the side member outer panel 34 shown in FIG. 2 are heated at a high temperature of 100 ° C. or higher. In this heated state, the coefficient of linear expansion K2 of the side member outer panel 34 is larger than the coefficient of linear expansion K1 of the front pillar RF32. Therefore, the amount of deformation (expansion) of the side member outer panel 34 due to thermal stress is larger than the amount of deformation (expansion) of the front pillar RF32 due to thermal stress. This makes it easier for the side member outer panel 34 to separate from the front pillar RF32.

Here, in the vehicle side structure 30, the fastening portion 56 is arranged at the peripheral portion (inside the projection region S) of the hole portion 54, which is a fragile portion. In other words, the fastening portion 56 is arranged at a portion where the side member outer panel 34 is most easily separated from the front pillar RF32. Therefore, since the fastening portion 56 resists deformation due to thermal stress acting on the side member outer panel 34, the front pillar RF32 is compared with a configuration in which the fastening portion 56 is not arranged inside the projection region S. The side member outer panel 34 becomes difficult to separate. That is, the floating of the side member outer panel 34 can be suppressed. Further, in the vehicle side structure 30, the number of fastening portions 204 (see FIG. 6) is smaller than that of the vehicle side structure 200 (see FIG. 6) of the comparative example, so that the number of bolts and nuts used for the fastening portion 204 is reduced. Is reduced. As a result, it is possible to suppress an increase in the number of parts.

When the vehicle side structure 30 was subjected to CAE analysis during heating under the same setting conditions as in the comparative example, the floating amount of the measurement point P1 shown in FIG. 3 was 0.50 (<1.02), and that of the measurement point P2. The floating amount was 0.58 (<0.92), and the floating amount at the measurement point P3 was 0.66 (<1.75). That is, according to the vehicle side structure 30, it was confirmed that the floating of the side member outer panel 34 can be suppressed as compared with the vehicle side structure 200 of the comparative example.

According to the vehicle side structure 30, the increase in the number of parts is suppressed, so that the vehicle body 11 can be made lighter and the man-hours for mounting can be reduced.

Further, according to the vehicle side structure 30, it is possible to improve the coatability of the sealer by suppressing the floating of the side member outer panel 34 with respect to the front pillar RF32. Specifically, when the side member outer panel 34 and the front pillar RF32 are heated, the front or rear portion of the vehicle front-rear direction with respect to the hole 54 is vulnerable to the other portions. The amount of deformation tends to be large. Here, according to the vehicle side structure 30, floating can be suppressed at a portion of the hole 54 on the front side or the rear side in the vehicle front-rear direction in which the amount of deformation is larger than the amount of deformation of the other portion. As a result, for example, when the sealer is applied between the front pillar RF32 and the side member outer panel after mounting, the size of these gaps is small, which simplifies the application work of the sealer and the amount of the sealer applied. Can be suppressed.

Further, according to the vehicle side structure 30, the floating of the side member outer panel 34 with respect to the front pillar RF32 is suppressed, so that the sealer crack and the paint crack are suppressed, and the deterioration of the rust preventive property is suppressed. At the same time, poor appearance is suppressed.

<Modification example>
The present invention is not limited to the above embodiment.

The fastening portion 56 is not limited to the front side in the vehicle front-rear direction with respect to the hole portion 54 in the projection region S, and may be arranged on the rear side in the vehicle front-rear direction with respect to the hole portion 54. Further, the fastening portion 56 may be arranged on the hinge pillar portion 52 on the side where the distance from the hole portion 54 in the vehicle front-rear direction to the end portion is short. Further, the fastening portion 56 is arranged on the side of the hinge pillar portion 52 having a portion having high rigidity and a portion having low rigidity against thermal stress in the front-rear direction of the vehicle with respect to the hole portion 54. May be good.

The attachment portion is not limited to a portion attached by fastening such as the fastening portion 56, but may be a portion attached by joining such as welding. The mounting portion may be, for example, a portion to be mounted by joining using SPR (self-piercing rivet) or FDS (flow drill screw).

The mounted member is not limited to the front pillar RF32, and may be another inner panel arranged inside the side member outer panel 34 in the vehicle width direction.

The fragile portion is not limited to a portion where a through hole is formed such as the hole portion 54, and may be a portion having a lower rigidity than other portions with respect to thermal stress. For example, it may be a recess formed in the hinge pillar portion 52 and recessed outward or inward in the vehicle width direction.

The combination of materials having different coefficients of linear expansion is not limited to iron and aluminum, but may be a combination of iron and an aluminum alloy, a combination of other metals, or a combination of a metal and a resin.

Although an example of the vehicle side structure according to the embodiment and the modified example of the present invention has been described above, these embodiments and the modified example may be used in combination as appropriate, and as long as the gist of the present invention is not deviated. Of course, it can be carried out in various embodiments.

10 Vehicle 30 Vehicle side structure 32 Front pillar lower reinforcement (an example of attached member)
34 Side member outer panel 52 Hinge pillar part 54 Hole part (example of fragile part)
56 Fastening part (example of mounting part)
S projection area

Claims (2)

A member to be attached having a first-line coefficient of expansion and
A second portion having a mounting portion to be mounted on the member to be mounted and a hinge pillar portion having a fragile portion formed with a fragile portion that is more vulnerable to thermal stress than other portions including the mounting portion, and having a second linear expansion coefficient larger than that of the first line expansion coefficient. It has a coefficient of linear expansion, and the mounting portion is arranged on the front side or the rear side of the fragile portion in the vehicle front-rear direction with respect to the fragile portion inside the projection region in which the fragile portion in the hinge pillar portion is projected in the vehicle front-rear direction in the panel surface. Side member outer panel and
Vehicle side structure with. The fragile portion is a portion that constitutes the peripheral edge of a long hole that is long in the vertical direction of the vehicle.
The mounting portion is arranged on the front side or the rear side in the vehicle front-rear direction of the central portion of the fragile portion in the vehicle vertical direction.
The vehicle side structure according to claim 1.