JP5125927B2 - Body structure - Google Patents

Description

  The present invention relates to a vehicle body structure that protects an occupant when a vehicle side collision occurs.

Conventionally, as a vehicle body structure for protecting an occupant at the time of a vehicle side collision, for example, as described in JP 2006-248494 A, a box-shaped drink holder is provided on the lower end side of a door trim of a side door, It is known that a load transmission member is provided at a vehicle width direction outer side end portion of a body cross member extending in the vehicle width direction so as to face a drink holder. In such a vehicle body structure, when a collision load is input from the outside to the side door at the time of a vehicle side collision, and the side door is deformed inward in the vehicle width direction due to the collision load, the drink holder provided on the side door becomes the body cross member. It collides with the load transmission member provided in the. As a result, the collision load input to the side door is transmitted to the reinforcing structure portion of the vehicle via the drink holder and the load transmission member, and deformation of the side door due to the collision load is effectively suppressed.
JP 2006-248494 A

  In such a vehicle body structure, it is possible to suppress the deformation of the side door by transmitting the collision load at the vehicle side collision to the inner side in the vehicle width direction, but further improve the occupant's protection power at the time of the vehicle side collision. Is required.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a vehicle body structure that can sufficiently protect an occupant when a vehicle side collision occurs.

  The vehicle body structure according to the present invention is provided between the first rotation guide member provided on the end of the floor cross in the vehicle width direction and the door trim and the door panel, and collides with the first rotation guide member during a vehicle side collision. And a second rotation guiding member configured to rotate the door trim inward in the vehicle width direction with the vehicle lower side as a fulcrum.

  In this vehicle body structure, the second rotation guiding member provided between the door trim and the door panel moves inward in the vehicle width direction as the side door is deformed when the vehicle side crashes. When the vehicle collides with the first rotation guide member provided on the floor cloth, the collision load input to the side door can be released to the inside in the vehicle width direction. When the second rotation guiding member collides with the first rotation guiding member, the door trim rotates inward in the vehicle width direction with the vehicle lower side as a fulcrum. As a result, the upper end side of the door trim is detached from the door panel and moves to the passenger side. The door trim functions as a protective member that protects the occupant from the side door that is deformed inward in the vehicle width direction. As a result, it is possible to sufficiently protect the occupant during a vehicle-side collision.

  In the vehicle body structure according to the present invention, the first rotation guide member has a protruding portion that protrudes outward in the vehicle width direction on the upper end side, and the second rotation guide member is disposed on the side surface on the vehicle width direction inner side. It is preferable to have a concave portion formed so that the protruding portion enters during a side collision. The protruding portion of the first rotation guiding member is formed in the side surface on the inner side in the vehicle width direction of the second rotation guiding member when the vehicle side collision occurs. Accordingly, when the second rotation guiding member moves inward in the vehicle width direction and collides with the first rotation guiding member as the side door is deformed at the time of the vehicle side collision, the protruding portion enters the recess. When the inner surface of the recess is caught by the protruding portion, the second rotation guiding member rotates inward in the vehicle width direction with the protruding portion serving as a fulcrum. As a result, when pressed by the second rotation guide member, the door trim rotates inward in the vehicle width direction with the vehicle lower side as a fulcrum, and the occupant can be reliably protected.

  In the vehicle body structure according to the present invention, the side surface on the vehicle width direction outer side of the first rotation guide member is a first tapered surface that is inclined from the vehicle upper side toward the vehicle lower side toward the vehicle width direction outer side. The side surface on the inner side in the vehicle width direction of the rotation guide member may be a second tapered surface that is inclined outward in the vehicle width direction from the upper side of the vehicle toward the lower side of the vehicle so as to face the first tapered surface. preferable. A tapered surface such that a side surface on the vehicle width direction outer side of the first rotation guiding member is a tapered surface, and a side surface on the vehicle width direction inner side of the second rotation guiding member is opposed to the tapered surface of the first rotation guiding member; Therefore, when the second rotation guiding member moves inward in the vehicle width direction and collides with the first rotation guiding member by the vehicle side collision, the second tapered surface collides with the first tapered surface, Further, the second rotation guiding member rotates inward in the vehicle width direction with the top of one of the tapered surfaces as a fulcrum. As a result, the door trim is pushed by the second rotation guide member and is easily rotated inward in the vehicle width direction, and the passenger can be reliably protected.

  According to the present invention, it is possible to sufficiently protect an occupant during a vehicle-side collision.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a preferred embodiment of a vehicle body structure according to the present invention will be described in detail with reference to the drawings. In the present embodiment, only the structure on one side door side is described, and the right side in the drawing is referred to as “the vehicle width direction outside”, and the left side in the drawing is described as “the vehicle width direction inside”.

[First Embodiment]
FIG. 1 is a schematic sectional view of a vehicle employing a vehicle body structure 1 according to a first embodiment of the present invention as seen from the front.

  As shown in FIG. 1, the vehicle body structure 1 includes a side sill 2 that extends in the vehicle front-rear direction on both ends in the vehicle width direction, a center floor cloth 3 that extends in the vehicle width direction on the vehicle floor side, and a vehicle width direction. Provided between the side door 4 and the door trim 6, the side door 4 disposed on both sides, the door trim 6 attached to the inside of the side door 4 in the vehicle width direction, the outer side door bulk 7 provided in the side door 4, and the side door 4. The inner-side door bulk (second rotation guiding member) 8 and the center floor cross gusset (first rotation guiding member) 9 provided on both ends of the center floor cloth 3 in the vehicle width direction are configured. Yes. Note that the vehicle body structure 1 may be applied to a rear side door or a front side door.

  The side sill 2 is a hollow member that extends in the vehicle front-rear direction at both ends in the vehicle width direction of a floor (not shown) that extends in the horizontal direction below the vehicle and forms the floor surface of the vehicle, and constitutes a skeleton member of the vehicle To do. The side sill 2 is configured by joining a side sill outer 11 and a side sill inner 12. The side sill outer 11 has a U-shaped cross-sectional shape such that the inner side in the vehicle width direction is open. A pair of side wall portions extending inward in the width direction and a pair of flange portions provided at end portions of the side wall portions are provided. Further, the side sill inner 12 has a U-shaped cross-sectional shape such that the outer side in the vehicle width direction is open, and an inner wall portion 12a constituting the inner side wall of the side sill 2 and both vertical end portions of the inner wall portion 12a. A pair of side wall portions extending outward in the vehicle width direction, and a pair of flange portions provided at end portions of the side wall portions. The side sill 2 is formed by making the side sill outer 11 and the side sill inner 12 face each other and welding at the flange portions.

  The center floor cloth 3 is a hollow member having a rectangular cross section extending in the vehicle width direction on the floor, and an end portion on the outer side in the vehicle width direction is connected to the inner wall portion 12a of the side sill 2 by welding. As a result, the center floor cloth 3 has a function of reinforcing the floor and a function of transmitting an impact load caused by a vehicle side collision to the inside in the vehicle width direction. The center floor cloth 3 includes an inclined portion 3a that is inclined downward toward the outer side in the vehicle width direction below the passenger's seat, and an area in the vicinity of the outer end in the vehicle width direction that extends at a lower position than the inner portion in the vehicle width direction. And a low position portion 3b. Since the center floor cross gusset 9 (details will be described later) is disposed on the upper side surfaces of the inclined portion 3a and the low position portion 3b which are positioned at a low position, the reduction of the passenger compartment space and the interference with the passengers are prevented. ing.

  The side door 4 is provided on a side body of the vehicle and is configured to be opened and closed by being supported by a hinge provided on a pillar (not shown). The side door 4 has a configuration in which a window portion is provided on the upper side of the main body portion, but only the lower main body portion of the window portion is shown in FIG. The side door 4 is formed by joining a door outer panel 13 constituting an outer wall and a door inner panel 14 constituting an inner wall. The door outer panel 13 extends in the vehicle vertical direction outside the side sill 2, and the lower end extends to a position facing the outer wall 11 a of the side sill 2. The door inner panel 14 extends in the vehicle vertical direction above the side sill 2 and is configured to bend along the shape of the side wall portion on the upper side of the side sill 2 and the outer wall portion 11a on the lower end side thereof. The door outer panel 13 and the door inner panel 14 are joined to each other by welding their outer edges, and an internal space having a predetermined width is formed between the panels.

  The door trim 6 is a plate-like member formed of resin, and is provided on the side of the passenger compartment space of the side door 4 as a lining part of the side door 4. The door trim 6 extends in the vehicle vertical direction above the side sill 2 so as to provide a space between the door inner panel 14 and is attached to the surface of the door inner panel 14 on the vehicle interior space side. The width of the space between the door trim 6 and the door inner panel 14 is increased by the area below the vehicle protruding inward in the vehicle width direction, and the lower end of the door trim 6 is located above the side sill 2 and the door inner panel 14. It is joined with. The upper end portion of the door trim 6 is joined to the door inner panel 14 between the main body portion of the door inner panel 14 and the window portion. The door trim 6 is joined to the door inner panel 14 at such a strength that the door trim 6 is removed by being pushed by the inner-side door bulk 8 from the outside in the vehicle width direction to the inside in the event of a vehicle-side collision. The door trim 6 is joined by a member having a low engaging force such as a clip stopper so that the door trim 6 can be easily detached from the door inner panel 14 at the time of a vehicle side collision.

  The outer side door inner bulk 7 is a rectangular parallelepiped box-shaped member provided in the side door 4 and has a function of transmitting a collision load caused by a vehicle side collision to the inner side in the vehicle width direction. The outer side door inner bulk 7 is attached to the vehicle lower side position on the outer side surface in the vehicle width direction of the door inner panel 14 by welding or bolting. The outer door inner bulk 7 is made difficult to compress and deform in the vehicle width direction by providing a plurality of ribs in a box formed by, for example, sheet metal processing, thereby enabling a collision load to be reliably transmitted. Has been. Further, the box may be filled with a resin material.

  The inner-side door bulk 8 is a substantially rectangular parallelepiped box-shaped member that is provided between the door trim 6 and the door inner panel 14 and extends in the vehicle vertical direction, and transmits a collision load caused by a vehicle-side collision to the inside in the vehicle width direction. And has a function of guiding the rotation of the door trim 6. The inner-side door bulk 8 is attached by welding or bolting so as to be adjacent to the vehicle lower side position on the inner surface in the vehicle width direction of the door inner panel 14 via the outer-side door bulk 7 and the door inner panel 14. It has been. The inner-side door bulk 8 is made difficult to compress and deform in the vehicle width direction by providing a plurality of ribs in a box formed by, for example, sheet metal processing, whereby a collision load can be reliably transmitted. Has been. Further, the box may be filled with a resin material.

  A recess 16 is formed on the inner side surface 8 of the inner door inner bulk 8 in the vehicle width direction, whereby a lower protrusion 17 projecting inward in the vehicle width direction is formed on the lower end side. An upper protrusion 18 that protrudes inward in the direction is formed on the upper end side. The concave portion 16 is formed so that the upper protruding portion 19 of the center floor cross gusset 9 enters when a vehicle side collision occurs. Moreover, it is preferable that the recessed part 16 is provided in the position where the position of a vehicle up-down direction respond | corresponds with the outer side door bulk 7 and, thereby, the collision load transmitted from the outer side door bulk 7 at the time of a vehicle side collision Is particularly easily transmitted to the vicinity of the bottom surface 16 a of the recess 16. The vertical width of the tip surface 17 a of the lower protrusion 17 is narrower than the vertical width of the tip surface 18 a of the upper protrusion 18 and the vertical width of the bottom surface 16 a of the recess 16. The joining strength of the inner side door inner bulk 8 with respect to the door inner panel 14 is set to such a degree that the inner side door bulk 8 is separated from the door inner panel 14 by colliding with the center floor cross gusset 9 at the time of the vehicle side collision. As a result, at the time of a vehicle-side collision, the inner-side door bulk 8 moves as the outer-side door bulk 7 and the door inner panel 14 move inward in the vehicle width direction and collides with the center floor cross gusset 9. In this case, it can be rotated off the door inner panel 14. The lower portion of the inner door inner bulk 8 is firmly joined to the door inner panel 14 by bolting or welding, and the upper portion is joined by a member having a low engaging force such as a clip stopper. Thus, the upper part of the inner door bulk 8 is separated from the door inner panel 14 in the event of a collision.

  The center floor cross gusset 9 is a box-like member provided at the outer end in the vehicle width direction on the center floor cross 3 and transmits a collision load caused by a vehicle side collision to the inner side in the vehicle width via the center floor cross 3. In addition, it has a function of guiding the rotation of the door trim 6 through the inner door bulk 8. The center floor cross gusset 9 is attached to the upper surfaces of the inclined portion 3a and the low position portion 3b near the outer end in the vehicle width direction of the center floor cross gusset 9 by welding or bolting. The center floor cross gusset 9 is made difficult to compress and deform in the vehicle width direction by, for example, providing a plurality of ribs in a box formed by sheet metal processing, and is thus configured to reliably transmit a collision load. ing. Further, the box may be filled with a resin material.

  The center floor cross gusset 9 has an upper surface 9a on the upper side in the vehicle width direction and a side surface on the outer side in the vehicle width direction. The upper surface 9a on the upper side in the vehicle width direction extends so as to incline upward from the inclined portion 3a of the center floor cloth 3 toward the outer side in the vehicle width direction, and the side surface on the outer side in the vehicle width direction is the lower position portion 3b of the center floor cross 3 It spreads so that it may incline in the vehicle width direction toward the vehicle upper side. A recess 20 is provided on the side surface of the center floor cross gusset 9, whereby an upper protrusion (protrusion) 19 that protrudes outward in the vehicle width direction is formed on the upper end side, and outward in the vehicle width direction. A protruding lower protrusion 21 is formed on the lower end side. The recess 20 is preferably provided at the center position in the vehicle vertical direction, and the vertical width of the tip surface 19a of the upper protrusion 19 is made narrower than the vertical width of the bottom surface 20a of the recess 20. Yes. Specifically, the upper protrusion 19 protrudes toward the recess 16 formed on the side surface of the inner door bulk 8, and the inner door bulk 8 moves inward in the vehicle width at the time of the vehicle collision. In doing so, it is disposed at a position so as to enter the recess 16 and to be caught by the lower protrusion 17.

  A seat (not shown) is provided above the center floor cross gusset 9 and the center floor cross 3, and an occupant M sits on the seat.

  Next, the operation and effect of the vehicle body structure 1 according to the present embodiment will be described with reference to FIGS. FIG. 2 is a schematic cross-sectional view illustrating a situation in which another vehicle has side impacted the vehicle employing the vehicle body structure 1 according to the first embodiment. FIG. 3 is an enlarged view of a main part of FIG. FIG. 4 is an enlarged cross-sectional view of a main part showing a conventional vehicle body structure.

  In the vehicle body structure 1 according to the first embodiment, as shown in FIGS. 2 and 3, when a collision load F is input from the outside in the vehicle width direction due to a side collision of another vehicle, the door outer panel 13 of the side door 4 is By deforming inward in the vehicle width direction, the door outer panel 13 collides with the outer-side door bulk 7. The collision load is transmitted to the inner door inner panel 14 and the inner door bulk 8 in the vehicle width direction by inputting the collision load to the outer door bulk 7 due to the collision with the door outer panel 13. When the collision load is transmitted from the outer-side door bulk 7, the door inner panel 14 is deformed so as to fall inward in the vehicle width direction with the side sill 2 as a fulcrum, and the inner-side door bulk 8 is moved along with the deformation. Move inward in the vehicle width direction.

  When the inner side door bulk 8 moves inward in the vehicle width direction, the upper protrusion 19 of the center floor cross gusset 9 breaks through the door trim 6 or through the door trim 6 to the recess 16 of the inner side bulk 8. Get in. A collision load is transmitted to the center floor cross gusset 9 through the upper protruding portion 19 and the door inner panel is caused by the collision between the front end surface 19a of the upper protruding portion 19 entering the recessed portion 16 and the bottom surface 16a of the recessed portion 16. 14, entry of the door outer panel 13 and the outer-side door bulk 7 into the vehicle width direction is inhibited. The collision load transmitted to the center floor cross gusset 9 is transmitted to the center floor cross 3 and transmitted inward in the vehicle width direction.

  Further, when the inner side door bulk 8 moves inward in the vehicle width direction, the inner side surface 17b of the lower projection 17 of the inner side door bulk 8 becomes the inner side of the upper projection 19 of the center floor cross gusset 9. It catches on 19b. When the lower protrusion 17 is caught by the upper protrusion 19 of the center floor cross gusset 9, the inner door bulk 8 rotates and moves inward in the vehicle width direction with the lower protrusion 17 as a fulcrum.

  When the inner door bulk 8 rotates and moves inward in the vehicle width direction, the front end surface 18a of the upper protrusion 18 collides with the door trim 6 and applies a load so as to push the door trim 6 inward in the vehicle width direction. A rotational force directed inward in the vehicle width direction acts on the door trim 6 to which a load is applied, whereby the door trim 6 is detached from the door inner panel 14 at the upper end side and is rotated inward in the vehicle width direction with the lower end side as a fulcrum. To do. The rotationally moved door trim 6 covers the occupant M, whereby the occupant M can be protected from the side door 4 entering inward in the vehicle width direction.

  Here, the conventional vehicle body structure 30 is demonstrated for a comparison. As shown in FIG. 4, a conventional vehicle body structure 30 includes an outer side door bulk 7 provided in the side door 4, an inner side door bulk 38 provided between the side door 4 and the door trim 6, and a center floor. Center floor cross gussets 39 provided on both ends of the cross 3 in the vehicle width direction are provided. The inner side door bulk 38 in the vehicle body structure 30 has a flat side surface 38a on the inner side in the vehicle width direction, and is not provided with a recess or a protrusion. Further, the side surface 39a on the outer side in the vehicle width direction of the center floor cross gusset 39 is also a flat surface, and is not provided with a recess or a protrusion.

  In such a conventional vehicle body structure 30, when a collision load is input due to a vehicle side collision and the inner side door bulk 38 moves inward in the vehicle width direction along with the deformation of the side door 4 and the outer side door bulk 7, The side surface 38 a of the inner door inner bulk 38 collides with the side surface 39 a of the center floor cross gusset 39 through the door trim 6. As a result, the collision load is transmitted to the center floor cloth 3 via the center floor cross gusset 39, but the inner door bulk 38 remains in a state of colliding with the center floor cross gusset 39. Therefore, the door trim 6 is deformed inward in the vehicle width direction together with the deformation of the side door 4 without being detached from the door inner panel 14.

  On the other hand, in the vehicle body structure according to this embodiment, the inner door bulk 8 provided between the door trim 6 and the door inner panel 14 is deformed when the vehicle side collision occurs, and the side door 4 is deformed when the vehicle side collision occurs. Accordingly, the collision load input to the side door 4 can be released to the inside in the vehicle width direction by moving inward in the vehicle width direction and colliding with the center floor cross gusset 9 provided on the center floor cloth 3. When the inner door bulk 8 collides with the center floor cross gusset 9, the door trim 6 rotates inward in the vehicle width direction with the vehicle lower side as a fulcrum. As a result, the upper end side of the door trim 6 is detached from the door inner panel 14 and moves to the occupant M side. The door trim 6 functions as a protective member that protects the occupant M from the side door 4 that is deformed inward in the vehicle width direction. Thus, it is possible to sufficiently protect the occupant M at the time of a vehicle-side collision.

  In the vehicle body structure according to the present invention, the center floor cross gusset 9 has an upper protruding portion 19 that protrudes outward in the vehicle width direction on the upper end side, and the inner door bulk 8 is on the inner side in the vehicle width direction. It has a recess 16 that is formed so that the upper protrusion 19 enters when the vehicle crashes. That is, the lower protrusion 17 on the lower end side of the inner door bulk 8 is formed so as to protrude inward in the vehicle width direction and to be hooked with the upper protrusion 19 of the center floor cross gusset 9 when the vehicle side collision occurs. . Accordingly, when the inner door bulk 8 moves inward in the vehicle width direction and collides with the center floor cross gusset 9 as the side door 4 is deformed at the time of the vehicle side collision, the upper protrusion 19 enters the recess 16. When the lower protrusion 17 is hooked on the upper protrusion 19, the inner door bulk 8 rotates inward in the vehicle width direction with the lower protrusion 17 as a fulcrum. As a result, when pushed by the inner-side door bulk 8, the door trim 6 rotates inward in the vehicle width direction with the vehicle lower side as a fulcrum, and the occupant M can be reliably protected.

[Second Embodiment]
Next, a vehicle body structure according to the second embodiment will be described. The vehicle body structure 40 according to the second embodiment is different from the vehicle body structure 1 according to the first embodiment in that it includes an airbag 41 that is disposed between the occupant M and the door trim 6 when a vehicle side collision occurs. Is different. FIG. 5 is a schematic cross-sectional view showing a situation in which another vehicle has side-shot the vehicle body employing the vehicle body structure 40 according to the second embodiment, and corresponds to FIG.

  The vehicle body structure 40 includes an airbag device in the door trim 6. The airbag device is configured to operate when another vehicle collides, and covers the door trim 6 with the airbag 41. Accordingly, it is possible to improve the protective force of the occupant M against deformation of the side door in the vehicle width direction at the time of a vehicle side collision.

[Third Embodiment]
Next, a vehicle body structure according to the third embodiment will be described. The vehicle body structure 50 according to the third embodiment is mainly different from the vehicle body structure 1 according to the first embodiment in that a pad 51 is provided between the door trim 6 and the inner-side door bulk 8. Yes. FIG. 6 is a schematic cross-sectional view showing a vehicle body adopting the vehicle body structure 50 according to the third embodiment, and corresponds to FIG.

  The vehicle body structure 50 includes a pad 51 between the door trim 6 and the inner door bulk 8. Specifically, the pad 51 is an impact absorbing member provided on the distal end surface 18 a of the upper protruding portion 18 of the inner door bulk 8. The pad 51 is not fixed to the door trim 6. Thereby, when the inner side door bulk 8 rotates in the vehicle width direction at the time of a vehicle collision, the front end surface 18a of the upper protrusion 18 of the inner side door bulk 8 is given to the occupant M via the door trim 6. The impact can be absorbed by the pad 51.

[Fourth Embodiment]
Next, a vehicle body structure according to the fourth embodiment will be described. The vehicle body structure 60 according to the fourth embodiment includes an inner-side door inner bulk (second rotation guide member) 68 on the inner surface in the vehicle width direction and a vehicle having a center floor cross gusset (first rotation guide member) 69. The main difference from the vehicle body structure 1 according to the first embodiment is that the outer surfaces in the width direction are respectively tapered surfaces. FIG. 7 is a schematic cross-sectional view showing a vehicle body adopting the vehicle body structure 60 according to the fourth embodiment, and corresponds to FIG. FIG. 8 is an enlarged view of a main part showing a state in which another vehicle has collided with a vehicle adopting the vehicle body structure 60 according to the fourth embodiment, and corresponds to FIG.

  The side surface of the center floor cross gusset 69 of the vehicle body structure 60 on the outer side in the vehicle width direction is a tapered surface (first tapered surface) 69a that is inclined outward in the vehicle width direction from the vehicle upper side to the vehicle lower side. In addition, the inner side door inner bulk 68 of the vehicle body structure 60 has an inner side surface in the vehicle width direction that faces the tapered surface 69a of the center floor cross gusset 69 from the upper side of the vehicle toward the lower side of the vehicle. An inclined taper surface (second taper surface) 68a is formed. The inner side door inner bulk 68 is formed at a position higher than the center floor cross gusset 69.

  In the vehicle body structure 60 configured as described above, the inner side door inner bulk 68 moves inward in the vehicle width direction, so that the taper surface 69a of the center floor cross gusset 69 and the taper surface 68a of the inner side door inner bulk 68 However, they collide via the door trim 6. When the taper surface 68a and the taper surface 69a collide, a collision load is transmitted to the center floor cross gusset 69 through the inner side door inner bulk 68, and the door inner panel 14, the door outer panel 13 and the outer side door interior. The bulk 7 is prevented from entering the vehicle width direction inside. The collision load transmitted to the center floor cross gusset 69 is transmitted to the center floor cross 3 and is transmitted inward in the vehicle width direction.

  Further, when the inner side door inner bulk 68 moves inward in the vehicle width direction, the tapered surface 68 a of the inner side door inner bulk 68 is caught by the top portion 69 b of the upper end side of the tapered surface 69 a of the center floor cross gusset 69. When the tapered surface 68a is hooked on the top portion 69b of the center floor cross gusset 69, the inner side door bulk 68 rotates and moves inward in the vehicle width direction with the top portion 69b serving as a fulcrum.

  When the inner-side door bulk 68 rotates and moves inward in the vehicle width direction, the inner-side door bulk 68 applies a load so as to push the door trim 6 inward in the vehicle width direction at the upper end side of the tapered surface 68a. A rotational force directed inward in the vehicle width direction acts on the door trim 6 to which a load is applied, whereby the door trim 6 is detached from the door inner panel 14 at the upper end side and is rotated inward in the vehicle width direction with the lower end side as a fulcrum. To do. The rotationally moved door trim 6 covers the occupant M, whereby the occupant M can be protected from the side door 4 entering inward in the vehicle width direction.

  The present invention is not limited to the embodiment described above.

  For example, in the vehicle body structure 1 according to the first embodiment, the upper protrusion 18 and the lower protrusion 17 are provided on the inner side surface 8 of the inner door bulk 8 in the vehicle width direction. It is good also as a structure in which only the lower side protrusion part 17 is provided. Even with such a configuration, the inner-side door bulk 8 can be rotated by being hooked with the upper protrusion 19 of the center floor cross gusset 9.

  Further, in the vehicle body structure 1 according to the first embodiment, the upper protrusion 19 and the lower protrusion 21 are provided on the outer side surface of the center floor cross gusset 9 in the vehicle width direction. It is good also as a structure in which only the protrusion part 19 is provided. Even with such a configuration, the inner door bulk 8 can be rotated by hooking the lower protrusion 17 of the inner door bulk 8.

  Moreover, although the vehicle body structure according to the present embodiment is applied to the periphery of the center floor cross, it may be applied not only to the center floor cross but also to the periphery of the front floor cross member.

1 is a schematic cross-sectional view of a vehicle employing a vehicle body structure according to a first embodiment of the present invention as viewed from the front. It is a schematic sectional drawing which shows a mode that the other vehicle collided with the vehicle which employ | adopted the vehicle body structure which concerns on 1st Embodiment. FIG. 3 is an enlarged view of a main part of FIG. 2. It is a principal part expanded sectional view which shows the conventional vehicle body structure. It is a schematic sectional drawing which shows a mode that the other vehicle collided with the vehicle body which employ | adopted the vehicle body structure which concerns on 2nd Embodiment, and is a figure corresponding to FIG. It is a schematic sectional drawing which shows the vehicle body which employ | adopted the vehicle body structure which concerns on 3rd Embodiment, and is a figure corresponding to FIG. It is a schematic sectional drawing which shows the vehicle body which employ | adopted the vehicle body structure which concerns on 4th Embodiment, and is a figure corresponding to FIG. It is a principal part enlarged view which shows a mode that the other vehicle collided with the vehicle which employ | adopted the vehicle body structure which concerns on 4th Embodiment, and is a figure corresponding to FIG.

Explanation of symbols

  1, 40, 50, 60 ... Body structure, 3 ... Floor cloth, 6 ... Door trim, 14 ... Door inner panel, 8, 68 ... Inner side door bulk (second rotation guide member), 9, 69 ... Center floor Cross gusset (first rotation guide member), 16... Recessed, 19... Upper protrusion (projection), 68 .. taper surface (second taper surface), 69 a .. taper surface (first taper surface).

Claims (1)

A first rotation guide member provided on the vehicle crosswise end portion side of the floor cloth;
A second part is provided between the door trim and the door panel, and is configured to rotate the door trim inward in the vehicle width direction with the vehicle lower side as a fulcrum by colliding with the first rotation guiding member at the time of a vehicle side collision. A rotation induction member ,
The first rotation guide member has a protrusion on the upper end side that protrudes outward in the vehicle width direction,
The vehicle body structure characterized in that the second rotation guide member has a recess formed on the inner side surface in the vehicle width direction so that the protruding portion enters when a vehicle side collision occurs.

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