JP2001063620A - Body structure for automobile - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress penetration of a rocker part and a center pillar into a vehicle cabin and a collapse of a seat mounting bracket, secure a space in the vehicle cabin, and prevent tilting of a seat, in side impact. SOLUTION: In this body structure, a seat mounting bracket 5 is arranged at a lower part or a center pillar 3, and a reinforcing member 9 connecting a rocket part 2 and a side member 8 is arranged on a lower face of a floor panel 4 in a position below this seat mounting bracket 5. By connecting the rocket part 2 and the side member 8 with the reinforcing member 9 at the lower part of the center pillar 3, bending of the rocker part 2 into a vehicle cabin and a deformation of the floor panel 4 are suppressed, penetration of the rocker part 2 and the center pillar 3 into the vehicle cabin is suppressed, and a collapse of the seat mounting bracket 5 is prevented, in side impact.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle body structure of a motor vehicle, and more particularly to a vehicle body structure of a monocoque body structure in which a seat mounting bracket disposed below a center pillar is reinforced.

[0002]

2. Description of the Related Art In a conventional vehicle body structure, FIGS.
As shown in FIG. 2, a seat mounting bracket 15 is disposed on a floor panel 14 at a joint portion between a rocker portion 12 of a vehicle body 11 of a monocoque body and a lower portion of a center pillar 13 toward a vehicle width direction inside. Then, the sheet 20 (FIG. 8)
The front end is fixed on the front floor cross member 16 at the front, and the outside in the vehicle width direction at the rear end is
As shown in FIG. 8, it is fixed to the seat mounting bracket 15. The inside of the rear end of the seat in the vehicle width direction is fixed to a mounting seat provided in the floor tunnel 17. In FIG. 7, reference numeral 18 denotes a side member disposed on the lower surface of the floor panel 14 in the front-rear direction.

Japanese Patent Laid-Open Publication No. Sho 63-38084 discloses a structure in which a reinforcing member for connecting a rocker portion and a side member is provided on the lower surface of a floor panel corresponding to a lower portion of a center pillar.

Japanese Patent Application Laid-Open No. Hei 5-131953 discloses a mounting structure in which a body bracket and a chassis frame are connected to a lower surface of a floor panel and an inner surface of a side sill at a position below a center pillar. At the same time, a support member such as a seat mounting bracket is arranged on the floor panel so as to correspond to the mount bracket, and the support bracket is mounted on the chassis frame corresponding to the mount bracket, and an appropriate cushioning material is provided between the mount bracket and the support bracket. A structure in which a bolt is penetrated from a support member to a support bracket and fastened in a state where the support member is interposed is disclosed.

[0005]

However, in the configuration of the above-mentioned conventional example, when an excessive load due to a side collision is applied as shown by an arrow a in FIG. 6, the rocker portion 12 is easily formed as shown by a virtual line. 7, and the floor panel 14 is deformed as shown by the imaginary line in FIG. 7, so that the penetration amount of the center pillar 13 into the vehicle interior increases, and the space in the vehicle interior increases. As a result, the seat mounting bracket 15 falls obliquely downward toward the passenger compartment side, and as a result, the support of the rear end of the seat 20 is lost, and the seat 20 falls, and the center pillar 13 enters. And the side pad 20a of the seat 20 does not work effectively for the occupant.

The technique disclosed in Japanese Patent Application Laid-Open No. 63-38084 does not provide a seat mounting bracket on a floor panel, and does not solve the above-described problem caused by the seat mounting bracket falling down.

The technique disclosed in Japanese Patent Application Laid-Open No. 5-119553 discloses a structure in which a mount bracket and a support bracket are provided below a center pillar in a joint structure between a body main body and a chassis frame. However, the present invention does not solve the above-mentioned problem by increasing the joint rigidity of the pillar, the floor panel, and the side sill by the support member, and further increasing the joint rigidity with the chassis frame.

The present invention has been made in view of the above-mentioned conventional problems, and suppresses the intrusion of the rocker portion and the center pillar into the vehicle interior and the fall of the seat mounting bracket at the time of a side collision, thereby securing a space in the vehicle interior. It is an object of the present invention to provide a vehicle body structure that can prevent the vehicle from falling down.

[0009]

According to the vehicle body structure of the present invention, a seat mounting bracket is provided below a center pillar, and a rocker portion and a side member are connected to a lower surface of a floor panel below the seat mounting bracket. Since the reinforcing member is provided and the rocker portion and the side member are connected by the reinforcing member below the center pillar, bending of the rocker portion toward the cabin side and deformation of the floor panel at the time of a side collision are suppressed. Part and the center pillar can be prevented from entering the vehicle interior and the seat mounting bracket from falling down.
It is possible to secure a space in the vehicle interior and prevent the seat from falling down.

Further, when the seat mounting bracket has a U-shaped cross section opened downward and the reinforcing member has an U-shaped cross section opened upward, the cross section of the seat mounting bracket mounting portion becomes a double closed cross section. The effect is further improved, and the torsional strength of the entire body is improved, so that the strength, strength, noise, and steering stability of the body are improved, and the reinforcing member provided in the rocker and the internal bulkhead can be eliminated, resulting in cost. Reduction and weight reduction can be achieved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the vehicle body structure of an automobile according to the present invention will be described below with reference to FIGS.

In FIG. 1, a vehicle body 1 having a monocoque body is shown.
A seat mounting bracket 5 is disposed on the floor panel 4 at the joint between the rocker portion 2 and the lower portion of the center pillar 3 toward the inside in the vehicle width direction. The sheet (not shown)
The front end portion is fixedly connected to the front front cross member 6 at the front, the rear end of the vehicle in the vehicle width direction is fixedly connected to the seat mounting bracket 5, and the rear end portion of the vehicle is positioned inside the floor tunnel at the floor width. 7 is fixedly connected to a mounting seat (not shown) provided on the base 7.

2 to 5, on the lower surface of the floor panel 4, a side member 8 is disposed in the front-rear direction at a position inside the rocker portion 2 at an appropriate distance in the vehicle width direction. On the lower surface of the floor panel 4 below the seat mounting bracket 5, a reinforcing member 9 for connecting the rocker portion 2 and the side member 8 is provided.

The rocker section 2 has a closed cross-sectional structure composed of a rocker inner 2a and a rocker outer 2b, and a reinforcing member 2c is disposed between the joints at the upper and lower ends thereof. In the present embodiment, the provision of the reinforcement member 9 eliminates the reinforcement member 2d which is disposed outside the reinforcement member 2c and is indicated by a virtual line in FIG.
Bulkheads arranged to maintain their cross-sectional shape within have been eliminated. The center pillar 3 has a closed cross-sectional structure including a center pillar inner 3a and a center pillar outer 3b, and a lower end of the center pillar outer 3b is integrally formed with the rocker outer 2b.

The seat mounting bracket 5 has a downwardly open U-shaped cross section, a joining flange 5a is formed on the outside from the lower end edge, and a nut 5b for fastening and fixing the seat is fixed to an appropriate position on the lower surface of the upper wall. . The reinforcing member 9 has an open U-shaped cross section, and a joining flange 9a is formed outward from an upper edge thereof. As shown in FIG. 4, in a portion where the seat mounting bracket 5 and the reinforcing member 9 vertically oppose each other, the joining flanges 5a and 9a are integrally joined by spot welding 10 with the floor panel 4 interposed therebetween. Have been.

As shown in FIG. 3, the side member 8 has an upwardly open U-shaped cross section, and a joining flange 8a is formed from the upper edge to the outside, and the joining flange 8a is attached to the floor panel 4 at appropriate intervals. It is integrally joined by spot welding,
Further, at the joint between the reinforcing member 9 and the side member 8, the joining flange 9a on the upper edge of the reinforcing member 9 is spot-welded to the floor panel 4 at a position before the joining flange 8a.
At the joint flange 8a, and joined by spot welding 10 in a state where the floor panel 4 and the joint flange 9a are sandwiched between them, and the reinforcing member 9
Flange 9b formed outside from the leading edge of both side walls
Are joined to the side wall of the side member 8 by spot welding 10, and a joining flange 9 c formed outside from the bottom edge of the bottom wall of the reinforcing member 9 is joined to the bottom wall of the side member 8 by spot welding 10. .

According to the above configuration, since the rocker portion 2 and the side member 8 are connected to each other by the reinforcing member 9 below the center pillar 3, the rocker portion 2 is bent toward the vehicle interior at the time of a side collision, and the floor panel is bent. The deformation of the rocker portion 4 and the center pillar 3 are suppressed from entering the vehicle interior, and the seat mounting bracket 5 can be prevented from falling obliquely downward toward the vehicle interior. Therefore, the interior space of the vehicle can be ensured in the event of a side collision, and the support of the rear end portion of the seat is lost and the seat falls down, which facilitates the entry of the center pillar 3 and the side pad of the seat is effective for the occupant. The occurrence of problems such as no longer working can be suppressed.

Further, since the seat mounting bracket 5 has a U-shaped cross section opened downward and the reinforcing member 9 has a U-shaped cross section opened upward and is integrally joined with the floor panel 4 interposed therebetween, The cross-section of the portion where the mounting bracket 5 is disposed is a double closed cross-section with the floor panel 4 interposed therebetween, and the above effects are further improved, and the torsional strength of the entire body 1 is improved, so that the strength, strength, noise, Steering stability is improved, and a reinforcing member provided in the rocker unit 2 and an internal bulkhead can be eliminated, so that cost and weight can be reduced.

[0019]

According to the vehicle body structure of the present invention, the seat mounting bracket is disposed below the center pillar as described above, and the reinforcing member for connecting the rocker portion and the side member to the lower surface of the floor panel below the center mounting bracket. The rocker and the sited member are connected by a reinforcing member at the lower part of the center pillar, so that the rocker can be prevented from bending toward the passenger compartment and deforming the floor panel in the event of a side collision, whereby the rocker and the center can be restrained. Intrusion of the pillar into the vehicle interior and fall of the seat mounting bracket can be suppressed, and space in the vehicle interior can be secured and the seat can be prevented from falling.

Further, when the seat mounting bracket has a U-shaped cross section opened downward and the reinforcing member has an U-shaped cross section opened upward, the cross section of the seat mounting bracket mounting portion becomes a double closed cross section. The effect is further improved, and the torsional strength of the entire body is improved, so that the strength, strength, noise, and steering stability of the body are improved, and the reinforcing member provided in the rocker and the internal bulkhead can be eliminated, resulting in cost. Reduction and weight reduction can be achieved.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a vehicle body in an embodiment of a vehicle body structure of an automobile according to the present invention.

FIG. 2 is a schematic plan view of a main part in the embodiment.

FIG. 3 is a sectional view taken on line AA of FIG. 2;

FIG. 4 is a sectional view taken along the line BB of FIG. 3;

FIG. 5 is a perspective view of a main part of the embodiment viewed from the vehicle interior side.

FIG. 6 is an overall perspective view of a vehicle body structure of a conventional example.

FIG. 7 is a sectional view taken along the line CC of FIG. 6;

FIG. 8 is an exploded perspective view of a seat mounted on a seat mounting bracket.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Body 2 Rocker part 3 Center pillar 4 Floor panel 5 Seat mounting bracket 8 Side member 9 Reinforcement member

Claims (2)

[Claims] 1. An automobile according to claim 1, wherein a seat mounting bracket is provided below the center pillar, and a reinforcing member for connecting the rocker portion and the side member is provided below the floor panel below the seat mounting bracket. Body structure. 2. The vehicle body structure according to claim 1, wherein the seat mounting bracket has a U-shaped cross section opened downward, and the reinforcing member has a U-shaped cross section opened upward.