JP2009161056A - Body side structure - Google Patents

Abstract

An object of the present invention is to provide a vehicle body side structure capable of suppressing deformation of a vehicle not only at the time of a frontal collision or a side collision but also at the time of an oblique collision.
A vehicle body side structure in which a rocker 2, a floor cloth 4, and a center pillar 6 are coupled, and an end of the floor cloth 4 penetrates the rocker inner 2B and the center pillar inner 6B to form a rocker outer. The bulkhead members 10 and 12 that extend to the connecting portion between 2A and the center pillar outer 6A, are connected to the rocker inner 2B and the rocker outer 2A, and form a closed cross section together with the floor cross 4 and the center pillar inner 6B. The vehicle body side part structure connected to 2A or the rocker inner 2B and the floor cloth 4.
[Selection] Figure 1

Description

  The present invention relates to a vehicle body side structure, and more particularly to a vehicle body side structure that can efficiently transmit a collision load from a vehicle to be damaged at the time of a collision to a floor member.

  A vehicle body structure comprising a pair of left and right rockers extending in the front-rear direction of the vehicle body, a floor cloth that is provided along the vehicle width direction and that couples the pair of rockers, and a floor panel that is coupled to the rocker and the floor cloth. In an automobile, the seat is usually supported by a cross member.

  In the case of a side collision in which the vehicle to be impacted collides from the side while the vehicle is running, a load in the direction in which the rocker is bent, in other words, the direction in which the floor cross is axially compressed, is input to the joint between the rocker and the floor cloth. Therefore, improvement in strength and rigidity in that direction is also strongly required.

For example, the rocker and floor cloth joint structure with improved strength and rigidity in the side impact direction
A center cross member 34 that penetrates a hole 32 formed in the inner pillar 29a of the center pillar 29 that intersects the center cross 24 is configured to extend outward, and the tip of the extended center cross member 24 is in the base of the pillar 29. And a structure configured as a bulkhead 33 (Patent Document 1),
A structure in which a B pillar inner 11 is extended between the side sill outer 5 and the side sill inner 7 and a bulkhead 25 is welded to a corner portion of the B pillar inner 11 reaching a substantially horizontal portion 19 (Patent Document 2).
The rocker portion 44 has two closed cross sections S and S2 that are continuously provided, and a structure in which the upper portion is firmly coupled by a floor panel 41 and a cross member (Patent Document 3).
A rocker reinforcement with a cross-sectional shape that is coupled to the inside of the rocker and viewed from the front-rear direction of the vehicle body is a hat shape that is open on the inside of the vehicle body, and an end portion in the vehicle width direction penetrates the vehicle width direction inner side of the rocker to the rocker reinforcement. In a vehicle body structure (Patent Document 4) having a combined cross member and a rocker member combination structure of a vehicle, the cross member passes through an opening provided in the inner panel of the rocker, and the leading end is connected to the floor panel. The inner panel is coupled to the cross member at the rear part of the outside world (Patent Document 5)
(In the above, the next code of the member name is the code in each patent document).
Japanese Patent Application Laid-Open No. 07-081626 Japanese Patent Laid-Open No. 05-208688 JP 07-061374 A Japanese Patent Laid-Open No. 06-171550 Japanese Utility Model Publication No. 63-102580 (microfilm of Japanese Utility Model Application No. 61-197366)

  According to the coupling structure, significant improvement in strength and rigidity at the time of side collision is achieved.

  However, the harming vehicle not only side impacts the automobile, but also has a possibility of obliquely colliding with the automobile in the vehicle width direction, such as obliquely forward or obliquely rearward. is there.

  In addition, when the vehicle to be damaged is larger than the vehicle, the vehicle to be damaged may collide with the vehicle above the rocker, such as the center part of the center pillar.

  As described above, a vehicle body side structure is desired in which the vehicle body of the vehicle does not greatly deform even when the perpetuating vehicle obliquely strikes the vehicle or collides upward with respect to the rocker of the vehicle. ing.

  It is an object of the present invention to provide a vehicle body side structure capable of suppressing deformation of a vehicle body not only at the time of a frontal collision or a side collision to a rocker but also at a time of an oblique collision or a side collision above the rocker. Objective.

  The invention according to claim 1 is a vehicle body side structure in which a rocker extending along the front-rear direction of a vehicle and a floor cloth extending along the vehicle width direction are coupled to each other. The end portion of the rocker penetrates the inner wall in the vehicle width direction of the rocker and is coupled to the rocker at the inner and outer walls in the vehicle width direction of the rocker, and at least the vehicle width direction outer side or the vehicle width direction inner side of the rocker. A bulkhead member that is coupled to an inner wall surface and an outer wall surface of the floor cloth to form a closed cross section is provided inside the rocker.

  In the vehicle body side part structure according to claim 1, a closed cross section is formed by the bulkhead member, the inner wall surface of the rocker, and the outer wall surface of the floor cloth.

  Therefore, when an injurious vehicle obliquely projects from diagonally forward or diagonally behind the vehicle, the collision load is received by the closed cross section and transmitted to the floor cloth.

  In addition, the floor cloth penetrates the inner wall of the rocker in the vehicle width direction and is connected to the rocker by the inner wall of the rocker in the vehicle width direction and the outer wall in the vehicle width direction. The collision load is received directly by the floor cloth.

  Therefore, in both cases where the perpetuating vehicle has collided and the vehicle has slanted forward or obliquely from the rear, the coupling structure without the bulkhead member or the bulkhead member has a floor cloth and a rocker. Compared with a joint structure that does not form a closed cross section, the deformation of the joint between the rocker and the floor cloth is effectively suppressed, and the collision load is efficiently transmitted to the floor cloth.

  According to a second aspect of the present invention, in the vehicle body side part structure according to the first aspect, the bulkhead member is provided in front of and behind the vehicle with respect to the floor cloth.

  In the vehicle body side part structure according to claim 2, since the bulkhead member is provided in the front and rear of the floor cloth, the closed cross section is formed in the front and rear of the floor cloth. The

  Therefore, the deformation of the connecting portion between the rocker and the floor cloth at the time of the oblique collision from the front and the rear of the vehicle is further effectively suppressed, and the collision load at the oblique collision is more efficiently transmitted to the floor cloth.

  According to a third aspect of the present invention, in the vehicle body side portion structure according to the second aspect, the bulkhead member is provided above the vehicle with respect to the floor cloth.

  The vehicle body side part structure according to claim 3, wherein the bulkhead member provided above the vehicle with respect to the floor cloth has a closed cross section not only at the front and rear of the vehicle but also above the vehicle. Is formed.

  Therefore, when the harming vehicle obliquely projects to a position higher than the rocker, the collision load is transmitted to the floor cross through the closed cross section above the vehicle.

  According to a fourth aspect of the present invention, in the vehicle body side structure according to the third aspect, the bulkhead member is provided below the vehicle with respect to the floor cloth.

  In the vehicle body side part structure according to claim 4, since the bulkhead member is provided not only above the vehicle but also below the vehicle with respect to the floorcross, the bulkhead member prevents the floorcross from being formed. Closed cross sections are formed both above and below the vehicle.

  Therefore, when the perpetuating vehicle obliquely protrudes to a position higher than the rocker, the collision load is transmitted to the floor cross through the vehicle upper and lower closed cross sections.

  According to a fifth aspect of the present invention, in the vehicle body side part structure according to any one of the first to fourth aspects, a center pillar extending upward of the vehicle at a joint portion between the rocker and the floor cloth. A vehicle inner side wall of the center pillar passes through the coupling portion in the vehicle vertical direction at the end of the center pillar, and the bulkhead member is connected to the rocker of the rocker. A closed cross-section is formed by being coupled to an inner wall surface on the outer side in the vehicle width direction or on the inner side in the vehicle width direction, an inner wall surface in the vehicle width direction at the end portion of the center pillar, and an outer wall surface of the floor cloth. .

  6. The vehicle body side part structure according to claim 5, wherein the bulkhead member includes an inner wall surface of the rocker in the vehicle width direction outer side or the vehicle width direction inner side, and a wall in the vehicle width direction inner side of the end portion of the center pillar. Are connected to the outer wall surface of the floor cloth to form a closed cross section.

  Accordingly, a plurality of closed cross sections can be formed as compared with the coupling structure not having the center pillar, so that the collision load at the time of the oblique collision is effectively transmitted by the floor cloth.

  According to a sixth aspect of the present invention, in the vehicle body side part structure according to any one of the first to fifth aspects, an outer wall surface of the rocker and an outer side in the vehicle width direction of the center pillar, A closed cross section is also formed between the inner wall surface on the inner side in the vehicle width direction.

  According to the vehicle body side structure according to claim 6, the collision load when the harming vehicle collides with a position higher than the rocker is not only a closed cross section located above and below the floor cloth, It is transmitted to the floor cloth via a closed cross section between the outer wall surface of the rocker and the inner wall surface of the center pillar on the outer side in the vehicle width direction and on the inner side in the vehicle width direction.

  According to a seventh aspect of the present invention, in the vehicle body side part structure according to the sixth aspect of the present invention, a concave portion is formed on the inner wall of the center pillar in the vehicle width direction, and the vehicle in the center pillar is formed on the bottom surface of the concave portion. The closed cross section is formed by being combined with the outer wall in the sub-direction.

  The invention according to claim 8 is the vehicle body side structure according to claim 6, further comprising a bulkhead member positioned above the vehicle with respect to the floor cloth, wherein the bulkhead member is located above the rocker above the vehicle. The closed cross section is formed by extending and connecting to the inner wall surface of the center pillar on the outer side in the vehicle width direction.

  According to a ninth aspect of the present invention, in the vehicle body side structure according to any one of the first to seventh aspects, the bulkhead member is formed integrally with the floor cloth.

  According to the first aspect of the present invention, as described above, as compared with a coupling structure not having the bulkhead member and a coupling structure in which the bulkhead member does not form a closed cross section with the inner wall surface of the floor cloth and the rocker. The collision load is efficiently transmitted to the floor cloth.

  Therefore, according to the said invention, the vehicle body side part structure which can suppress effectively a deformation | transformation of the vehicle body when a perpetuating vehicle side-impacts, and when it obliquely protrudes from the vehicle diagonally forward and diagonally backward is provided.

  According to the second aspect of the present invention, as described above, the collision load at the time of the oblique collision from the oblique front of the vehicle and the oblique rear of the vehicle is transmitted to the floor cross by the closed space of the floor cross at the front of the vehicle and the rear of the vehicle. The

  Therefore, there is provided a vehicle body side part structure that can more effectively suppress the deformation of the vehicle body when the perpetuating vehicle side impacts and when the vehicle obliquely projects from obliquely forward and obliquely rearward.

  According to the third aspect of the present invention, when the perpetuating vehicle obliquely protrudes to a position higher than the rocker, the collision load is transmitted to the floor cross through the closed cross section above the vehicle.

  Therefore, according to the present invention, the deformation of the vehicle body occurs not only when the perpetuating vehicle collides sideways and when the vehicle obliquely projects from diagonally forward and diagonally rearward, but also when the vehicle impacts above the rocker, for example, when the vehicle collides with the center pillar. In particular, there is provided a vehicle body side portion structure that can effectively suppress deformation such that the center pillar is folded inward in the vehicle width direction.

  According to the fourth aspect of the present invention, when the harm vehicle obliquely protrudes to a position higher than the rocker, the collision load is transmitted to the floor cross via the closed cross section above and below the vehicle.

  Therefore, according to the invention, compared to the vehicle body side part structure that does not have a bulkhead member positioned below the floor cloth with respect to the floor cloth, the center pillar when the harming vehicle collides upward from the rocker is provided. A vehicle body side structure that can more effectively suppress deformation of the vehicle body that is folded inward in the vehicle width direction is provided.

  According to the fifth aspect of the present invention, as described above, a large number of closed cross sections can be formed as compared with the coupling structure not having the center pillar. Communicated.

  Therefore, the deformation of the vehicle body at the time of the oblique collision can be more effectively suppressed as compared with the coupling structure in which the bulk member is not provided between the center pillar, the rocker, and the floor cloth.

  According to the sixth aspect of the present invention, when the perpetuating vehicle obliquely projects to a position higher than the rocker, the collision load is not limited to the closed cross section above and below the vehicle, but via the closed cross section above the rocker. Is transmitted to the floor cloth.

  Therefore, according to the present invention, the center pillar of the vehicle body in the case where the vehicle to be damaged collides upward from the rocker is inward in the vehicle width direction, compared to the vehicle body side structure in which the closed section is not formed above the rocker outer. There is provided a vehicle body side structure that can more effectively suppress deformation such as folding.

  In the invention of claim 7, the inner wall in the vehicle width direction of the center pillar and the outer wall in the vehicle width direction of the center pillar are coupled to each other at the bottom surface of the recessed portion formed in the inner wall in the vehicle width direction of the center pillar. Thus, a closed cross section is formed above the rocker.

  Therefore, it is not necessary to newly add a member for forming a closed section above the rocker.

  According to an eighth aspect of the present invention, the bulkhead member positioned above the vehicle with respect to the floor cloth is extended above the vehicle and coupled to the inner wall surface of the center pillar in the vehicle width direction. A closed cross section is formed above.

  Therefore, it is not necessary to form a recessed portion for forming a closed cross section above the rocker on the inner wall of the center pillar in the vehicle direction.

  In the invention described in claim 9, the bulkhead member is formed integrally with the floor cloth.

  Therefore, according to the said invention, the number | score of a member can be reduced compared with the aspect which forms the said bulkhead member as another member.

1. Embodiment 1
Hereinafter, the coupling part 100 which is an example of the vehicle body side part structure according to the present invention will be described.

(1) Configuration As illustrated in FIGS. 1 to 3, the coupling unit 100 according to the first embodiment includes a rocker 2 that extends in the vehicle front-rear direction at both side edges of the floor 8 of the vehicle 1, and a vehicle width direction. A floor cloth 4 extending along the center pillar 6 extending toward the upper side of the vehicle is combined. In FIG. 1 and the following drawings, an arrow FR, an arrow RE, an arrow UP, an arrow DOWN, an arrow IN, and an arrow OUT respectively indicate the vehicle front, the vehicle rear, the vehicle upper, the vehicle lower, the vehicle width direction inner side, and the vehicle width direction outer side. Show. Further, “x” indicates a binding site of each member. In addition, spot welding is preferably used in a joint portion where the number of overlapping members is two, but when the number of overlapping members is three or more, two members are overlapped and spot welded or spot welding is performed. They can be joined by a welding method other than welding. Further, the method of joining the members is not limited to various welding methods such as spot welding, and various methods such as riveting and adhesion are possible.

  As shown in FIGS. 1 to 3, the rocker 2 includes a rocker outer 2 </ b> A that constitutes a wall on the outer side in the vehicle width direction, and a rocker inner that constitutes a wall on the inner side in the vehicle width direction with respect to the rocker outer 2 </ b> A. 2B are formed so as to be coupled to each other at the upper and lower edges to form a closed cross-sectional structure. Further, the center pillar 6 has a hat-shaped cross section, a center pillar outer 6A constituting a wall on the outer side in the vehicle width direction, and an inner side in the vehicle width direction that is located on the inner side in the vehicle width direction with respect to the center pillar outer 6A. The center pillar inner 6 </ b> B constituting the wall is joined to each other at the edge portion to form a lithographic surface structure.

  As shown in FIGS. 1 to 4, the rocker inner 2 </ b> B and the center pillar inner 6 </ b> B have openings 2 </ b> C and 6 </ b> C through which the floor cloth 4 is inserted. A flange 2D for connecting the floor cloth 4 is provided around the opening 2C in the rocker inner 2B.

  The floor cross 4 has a hat-shaped cross section with an open bottom surface, and is coupled to the floor 8 on the bottom surface to form a closed cross-sectional structure, and an end portion extends outward from the side edge of the floor 8 in the vehicle width direction. ing. The end of the floor cloth 4 is inserted into the opening 2C of the rocker inner 2B and the opening 6C of the center pillar inner 6B, and is connected to the rocker inner 2B at the flange 2D, and at the end of the bulkhead member 10 described later. Together with the inner wall surface of the rocker outer 2A.

  Between the rocker outer 2 </ b> A and the center pillar inner 6 </ b> B, the bulkhead member 10 is provided obliquely forward and obliquely rearward with respect to the floor cloth 4 and in the vehicle upward direction. On the other hand, between the rocker inner 2 </ b> B and the center pillar inner 6 </ b> B, the bulkhead member 12 is provided obliquely forward and obliquely rearward with respect to the floor cloth 4 and in the vehicle upward direction.

  The bulkhead member 10 is coupled to the inner wall surface of the rocker outer 2A together with the end of the floor cloth 4 at one end, and coupled to the center pillar inner 6B together with the rocker outer 2A at the other end. The bulkhead member 12 is coupled to the center pillar inner 6B together with the rocker inner 2B at one end, and is coupled to the side surface and the upper surface of the floor cloth 4 together with the flange 2D of the rocker inner 2B at the other end.

  As a result, as shown in FIGS. 1 and 2, the center pillar inner 6 </ b> B has a bulkhead member 10, the center pillar inner 6 </ b> B, and the floor cloth 4 on the outer side in the vehicle width direction. Closed cross sections A are formed at four locations at the rear of the vehicle, above the vehicle, and below the vehicle. Further, on the inner side in the vehicle width direction of the center pillar inner 6 </ b> B, the bulkhead member 12, the center pillar inner 6 </ b> B, and the floor cross 4, 4 in front of the vehicle, behind the vehicle, above the vehicle, and below the vehicle with respect to the floor cross 4. A closed cross section B is formed at a location.

  As shown in FIGS. 1, 3, and 4, the center pillar inner 6B has a recessed portion 6D, and the center pillar inner 6B is coupled to the center pillar outer 6A on the bottom surface of the recessed portion 6D. As a result, as shown in FIG. 1, a closed section C is formed above the rocker outer 2A by the rocker outer 2A, the center pillar outer 6A, and the center pillar inner 6B. In addition, a retractor is arrange | positioned by the recessed part 6D, and it is covered with the closing board 16 after that as an example.

(2) Operation Hereinafter, the operation of the coupling unit 100 according to the first embodiment will be described.
First, the case where the vehicle is obliquely projected from the vehicle rear side will be described.

  In the vehicle 1 including the coupling portion 100 according to the first embodiment, as illustrated in FIG. 9A, the bulkhead member 10, the center pillar inner 6 </ b> B, and the floor cloth 4 are disposed on the outer side in the vehicle width direction of the center pillar inner 6 </ b> B. Closed sections A are formed on the front and rear of the floor cloth 4. The bulkhead member 12, the center pillar inner 6B, and the floor cloth 4 form a vehicle closed section B on the vehicle front and rear of the floor cloth 4 on the inner side in the vehicle width direction of the center pillar inner 6B.

  Accordingly, since the connecting portion 100 has high strength and rigidity in the vehicle front-rear direction, the connecting portion 100 does not deform so much as shown in FIG. introduce.

  Thereby, since the deformation | transformation of the rocker 2 and the center pillar 6 by the said collision load is suppressed, the collapse of the passenger compartment of the vehicle 1 is also suppressed.

  On the other hand, in the coupling structure in which the bulkhead member 10 and the bulkhead member 12 do not form a closed cross section with any of the center pillar inner 6B and the floor cloth 4 as shown in FIG. When a collision load having the same direction and size as 100 is applied, as shown in FIG. 9D, both the rocker 2 and the center pillar 6 are deformed by the collision load. 1 is not effectively transmitted to the floor cloth 4 as compared with the connecting portion 100 according to 1.

  Next, a case will be described in which an injurious vehicle side impacts above the floor cross 4 in the center pillar 6 of the vehicle 1 from the vehicle width direction outer side toward the vehicle width direction inner side.

  In the vehicle 1 including the coupling portion 100 according to the first embodiment, as illustrated in FIG. 10A, the bulkhead member 10, the center pillar inner 6 </ b> B, and the floor cloth 4 are disposed on the outer side in the vehicle width direction of the center pillar inner 6 </ b> B. Closed sections A are also formed above and below the floor cloth 4 in the vehicle. The bulkhead member 12, the center pillar inner 6B, and the floor cloth 4 also form a vehicle closed section B on the vehicle upper and lower sides of the floor cloth 4 on the inner side in the vehicle width direction of the center pillar inner 6B. Furthermore, a closed cross section C is formed above the rocker outer 2A by the center pillar outer 6A, the center pillar inner 6B, and the rocker outer 2A.

  Therefore, since the coupling portion 100 has high strength and rigidity not only in the vehicle front-rear direction but also in the vehicle vertical direction, as shown in FIG. Is prevented from falling inward in the vehicle width direction, and the collision load is efficiently transmitted to the floor cloth 4.

  On the other hand, the bulkhead member 10 and the bulkhead member 12 do not form a closed cross section with any of the center pillar inner 6B and the floor cloth 4 as shown in FIG. 10C, and are closed above the rocker outer 2A. In the coupling structure in which the cross section C is not formed, when a collision load having the same direction and size as the coupling portion 100 is applied, as shown in FIG. Since it deform | transforms so that it may fall down inside a direction, the said collision load is not effectively transmitted to the floor cross 4 compared with the coupling | bond part 100 which concerns on Embodiment 1. FIG.

2. Embodiment 2
Hereinafter, the coupling part 102 which is another example of the vehicle body side part structure according to the present invention will be described.

  As shown in FIG. 5, the coupling portion 102 according to the second embodiment is a bulkhead member 10 provided in a space between the rocker outer 2 </ b> A and the center pillar inner 6 </ b> B that extends toward the upper side of the vehicle. It extends to the vehicle upper side of the rocker outer 2A, and the tip of the extending portion 10A extending to the vehicle upper side of the rocker outer 2A is bent outward in the vehicle width direction to the inner wall of the center pillar outer 6A in the vehicle width direction. Are connected. Thus, a closed section C is formed above the rocker outer 2A by the extending portion 10A of the head member 10, the center pillar outer 6A, and the rocker outer 2A.

  Except for the above points, the coupling unit 102 has the same configuration as the coupling unit 100 according to the first embodiment.

  In the coupling portion 102, it is not necessary to form the recessed portion 6D for forming the closed cross section C in the center pillar inner 6B, and the conventional plate-shaped center pillar inner 6B can be used. Compared to the vehicle having the coupling portion 100 according to the first embodiment, the manufacturing is further easier.

3. Embodiment 3
Hereinafter, the coupling part 104 which is still another example of the vehicle body side part structure according to the present invention will be described.

  In the coupling portion 104 according to the third embodiment, as shown in FIG. 8, the surfaces facing the vehicle upper side, the vehicle front side, and the vehicle rear side at the end portion of the floor cloth 4 extend from the inner side to the outer side, respectively. One extending piece is formed, and the extending piece is bent inward in the vehicle width direction to form the bulkhead member 14.

  As shown in FIGS. 6 and 7, the floor cross 4 is inserted through the opening 2C of the rocker inner 2B and the opening 6C of the center pillar inner 6B. The base portion 14B of the bulkhead member 14 is coupled to the inner wall surface of the rocker outer 2A in the vehicle width direction, and the tip portion 14A is coupled to the inner wall surface of the center pillar inner 6B in the vehicle width direction. Three closed sections A are formed by the member 14 and the floor cloth 4. Here, the base portion 14 </ b> B is an end portion on the side close to the floor cloth 4 in the bulkhead member 14, and the tip end portion 14 </ b> A is an end portion on the side far from the floor cross 4 in the bulkhead member 14.

  The center pillar inner 6B has a recessed portion 6D, and the bottom surface of the recessed portion 6D and the center pillar outer 6A are coupled to each other to form a closed section C above the rocker outer 2A.

  However, since the bulkhead member is not disposed between the rocker inner 2B and the center pillar inner 6B, a closed cross section is not formed between the rocker inner 2B and the center pillar inner 6B.

  Except for these points, the coupling unit 104 according to the third embodiment has the same configuration as the coupling unit 100 according to the first embodiment.

  In the coupling portion 104 according to the third embodiment, since the bulkhead member 14 is formed integrally with the floor cloth 4, the bulkhead members 10 and 12 are formed as separate members from the floor cloth 4. The number of members can be greatly reduced as compared with the connecting portion 100 according to 1.

FIG. 1 is a cross-sectional view illustrating a cross-section cut along a vertical plane with respect to the coupling structure according to the first embodiment. FIG. 2 is a cross-sectional view showing a cross section cut along the horizontal plane of the coupling structure according to the first embodiment. FIG. 3 is a perspective view illustrating a configuration of the coupling structure according to the first embodiment. FIG. 4 is a plan view illustrating a planar shape of the center pillar inner in the coupling structure according to the first embodiment. FIG. 5 shows a cross section cut along the vertical plane of the coupling structure according to the second embodiment. FIG. 6 is a cross-sectional view illustrating a cross-section cut along a vertical plane with respect to the coupling structure according to the third embodiment. FIG. 7 is a cross-sectional view showing a cross section cut along a horizontal plane in the joint structure according to the third embodiment. FIG. 8 is a perspective view showing that the floor cloth and the bulkhead member are integrated in the joint structure according to the third embodiment. FIG. 9 is an explanatory diagram showing how the coupling structure is deformed when a vehicle having the coupling structure according to the first embodiment is obliquely projected from the rear of the vehicle. FIG. 10 is an explanatory diagram showing how the coupling structure is deformed when a vehicle having the coupling structure according to the first embodiment is side-projected from the outside in the vehicle width direction toward the center pillar.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Rocker 2A Rocker outer 2B Rocker inner 2C Opening part 2D Flange 4 Floor cross 6 Center pillar 6A Center pillar outer 6B Center pillar inner 6D Recessed part 6C Opening part 8 Floor 10 Bulkhead member 10A Extension part 12 Bulkhead member 14 Bulkhead Member 14B Root part 14A Tip part 100 Coupling part 102 Coupling part 104 Coupling part

Claims (9)

A vehicle body side structure in which a rocker extending along the longitudinal direction of the vehicle and a floor cloth extending along the vehicle width direction are combined,
The end of the floor cloth penetrates the inner wall in the vehicle width direction of the rocker, and is coupled to the rocker at the inner wall direction and the outer wall of the rocker.
A bulkhead member that is coupled to at least an inner wall surface in the vehicle width direction inside or in the vehicle width direction of the rocker and an outer wall surface of the floor cloth to form a closed cross section is provided inside the rocker. Car body side structure.   The vehicle body side part structure according to claim 1, wherein the bulkhead member is provided in front of and behind the vehicle with respect to the floor cloth.   The vehicle body side part structure according to claim 2, wherein the bulkhead member is provided above the vehicle with respect to the floor cloth.   The vehicle body side structure according to claim 3, wherein the bulkhead member is provided below the vehicle with respect to the floor cloth. The connecting portion between the rocker and the floor cloth is connected to an end portion on the vehicle lower side of a center pillar extending upward of the vehicle,
The inner wall of the center pillar in the vehicle width direction at the end of the center pillar passes through the coupling portion in the vehicle vertical direction,
The bulkhead member is coupled to the inner wall surface of the rocker in the vehicle width direction outside or the vehicle width direction inside, the vehicle width direction inner wall at the end of the center pillar, and the outer wall surface of the floor cloth. The vehicle body side part structure according to any one of claims 1 to 4, wherein a cross section is formed.   The closed cross section is also formed between the outer wall surface of the rocker and the inner wall surface of the center pillar on the outer side in the vehicle width direction and on the inner side in the vehicle width direction above the rocker. Car body side part structure given in the paragraph.   7. The closed wall according to claim 6, wherein a concave portion is formed in an inner wall in the vehicle width direction of the center pillar, and the closed cross section is formed by being coupled to a wall in the vehicle sub-direction outer side of the center pillar at a bottom surface of the concave portion. Car body side structure.   A bulkhead member positioned above the vehicle with respect to the floor cloth, the bulkhead member extending above the rocker relative to the vehicle, and coupled to an inner wall surface of the center pillar in the vehicle width direction to form the closed cross section The vehicle body side part structure according to claim 6 in which is formed.   The vehicle body side part structure according to any one of claims 1 to 8, wherein the bulkhead member is formed integrally with the floor cloth.

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