JP3216467B2 - Seat mounting structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat mounting structure for a vehicle such as an automobile, and more particularly to a seat mounting structure for enhancing safety in a side collision.

[0002]

2. Description of the Related Art Conventionally, a seat mounting structure for further improving the safety in a side collision has been known, and one example thereof is disclosed in US Pat. No. 5,149,165.

As shown in FIGS. 5 and 6, in this seat mounting structure, a hinge portion 74A is provided at a portion of the mounting brackets 72, 74 of the seat 70 which are connected to the seat 70 of the mounting bracket 74 on the inner side in the vehicle width direction. The seat 70 is rotatable around the hinge 74A in the upper direction of the vehicle body (in the direction of the arrow U in FIGS. 5 and 6).

In FIG. 5, a spring 76 is disposed near the mounting bracket 72 on the outside in the vehicle width direction. The spring 76 moves the seat 70 upward when another vehicle 82 collides with the side door 80. Push up and rotate in the direction of arrow U.

In FIG. 6, an airbag 84 is provided near the mounting bracket 72 on the outer side in the vehicle width direction, and the airbag 84 raises the seat 70 when another vehicle 82 collides with the side door 80. In the direction of arrow U.

Therefore, in these seat mounting structures, the occupant sitting on the seat 70 can be moved away from the side door 80 in the event of a side collision, so that the time of secondary collision of the occupant can be delayed and the collision speed can be reduced. Can be lowered.

[0007]

However, in this seat mounting structure, an acceleration sensor for detecting the acceleration when another vehicle 82 collides is required, and based on the detection value detected by the acceleration sensor, Spring 76
A trigger device for releasing the airbag from the contracted state, an inflator for inflating the airbag 84, and the like are required. Therefore, the structure becomes complicated and the cost becomes high.

The present invention has been made in view of the above circumstances, and has as its object to provide a seat mounting structure capable of delaying a secondary collision time of an occupant at a low cost and reducing a collision speed.

[0009]

According to the present invention, there is provided a seat mounting structure including a rocker disposed along the longitudinal direction of a vehicle body at both lower ends of the vehicle body in the vehicle width direction, and a vehicle disposed inside the rocker in the vehicle width direction. A seat mounting bracket having an inclined surface extending from the upper side in the width direction to the lower side in the vehicle width direction, a seat track mounted on the lower left and right sides of the seat along the vehicle front-rear direction, and a seat track and the vehicle body in the vehicle width direction inner side. Turning means provided on the coupling portion of the turning means for turning the turning shaft in the front-rear direction of the vehicle body,
The connection is released when a load equal to or more than a predetermined value is provided at a connection portion between a seat track on the outer side in the vehicle width direction and the inclined surface of the seat mounting bracket, and the seat track on the outer side in the vehicle width direction is provided on the inclined surface And a coupling means that can move along.

[0010]

In the seat mounting structure of the present invention, when the seat mounting bracket is moved inward in the vehicle width direction by being pressed by the rocker at the time of a side collision, the seat mounting bracket is connected to the seat track on the outer side in the vehicle width direction. A load acts on the coupling means. When the load is equal to or greater than a predetermined value, the coupling of the coupling means is released, and the seat track on the outer side in the vehicle width direction moves substantially upward along the inclined surface of the seat mounting bracket. As a result, the seat turns about the turning axis of the turning means provided at the connecting portion between the seat track and the vehicle body on the inner side in the vehicle width direction, and the occupant sitting on the seat is provided with the seat. To move away from the side of the vehicle body. Further, the seat mounting structure of the present invention does not require an acceleration sensor, a trigger device, and the like, unlike the conventional structure. Therefore, the secondary collision time of the occupant can be delayed at a low cost, and the collision speed can be reduced.

In the seat mounting structure of the present invention, a part of the collision energy is absorbed by the rupture of the coupling means, and the seat and the occupant are lifted by the inclined surface after the rupture of the coupling means. Since part of the collision energy is absorbed, the collision energy can be efficiently absorbed.

Further, in the seat mounting structure of the present invention, the rocker can be prevented from falling down at the time of a side collision by the seat mounting bracket having the inclined surface, and the reaction force of the rocker at the time of the side collision can be prevented from sharply decreasing.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of a seat mounting structure according to the present invention will be described with reference to FIGS.

In these drawings, an arrow FR appropriately shown indicates a front side of the vehicle body, an arrow IN indicates an inner side in the vehicle width direction, and an arrow UP indicates an upper side of the vehicle body.

As shown in FIG. 1, rockers 12 are provided at lower portions on both ends in the vehicle width direction of the vehicle body 10 along the vehicle front-rear direction. The rocker 12 includes a rocker outer 14 that forms the outside of the rocker 12 in the vehicle width direction, and a rocker inner 16 that forms the inside of the rocker 12 in the vehicle width direction.

As shown in FIG. 2, the cross-sectional shape of the rocker outer 14 as viewed from the front of the vehicle body is a hat shape with an opening directed inward in the vehicle width direction. An upper flange 14B is formed toward the upper side of the vehicle body, and a lower flange 14D is formed at an opening edge of the lower wall portion 14C toward the lower side of the vehicle body. The cross-sectional shape of the rocker inner 16 as viewed from the front of the vehicle body is a hat shape with an opening directed outward in the vehicle width direction. Is formed, and a lower flange 16D is formed at the opening edge of the lower wall portion 16C toward the lower side of the vehicle body.

The upper flange 14B and the lower flange 14D of the rocker outer 14 are connected to the upper flange 1 of the rocker inner 16.
6B and the lower flange 16D are welded to each other, and the rocker outer 14 and the rocker inner 16 form a closed cross-section 18 extending substantially in the vehicle longitudinal direction.

A flange 20A is formed at the lower end edge of the inner side surface of the vertical wall portion 16E of the rocker inner 16 in the vehicle width direction.

In the vicinity of both ends in the vehicle width direction of the upper surface 20B of the floor pan 20, seat mounting brackets 22 are provided. The mounting portion 24 of the seat mounting bracket 22 includes:
It has a plate shape bent in an L shape, and a floor mounting portion 24A extending in the horizontal direction is welded to the upper surface 20B of the floor pan 20. A rocker mounting portion 24B extending upward from the vehicle width direction outer end of the floor mounting portion 24A is welded to the vehicle width direction inner side surface of the vertical wall portion 16E of the rocker inner 16 and the flange 20A of the floor pan 20. .

The floor mounting portion 24A and the rocker mounting portion 24B of the seat mounting bracket 22 are formed with an inclined portion 26A having an inclined surface 26A extending from the upper portion in the vehicle width direction to the lower portion in the vehicle width direction. The shape of the portion 26 as viewed from the front of the vehicle body is a wedge shape with its tip directed inward in the vehicle width direction. A groove 28 extending in the vehicle width direction is formed at the center of the inclined surface 26A in the vehicle longitudinal direction.
A slider 30 as a connecting means is provided on the upper side of the groove 28 so as to straddle the groove 28.

The slider 30 has a block shape extending in the vehicle longitudinal direction. The lower surface 30A of the slider 30 is an inclined surface and is in contact with the inclined surface 26A of the inclined portion 26, and the upper surface 30B is horizontal with the lower surface 30A in contact with the inclined surface 26A.

As shown in FIG. 3, connecting portions 32 project downward from both ends of the slider 30 in the front-rear direction of the vehicle body. These connecting portions 32 are formed by a neck portion 32A.
A substantially central portion 32B is connected to the slider 30 and is welded to the vertical wall portions 26B before and after the inclined portion 26.

Therefore, as shown in FIG.
When a load equal to or greater than 0 is applied in the vehicle width direction (the direction of arrow A in FIG. 2), the neck 32
A is broken so that the slider 30 goes up the inclined surface 26A. At the center of the lower surface 30A of the slider 30 in the front-rear direction of the vehicle body, a convex portion 34 that engages with the groove 28 is formed, and when the slider 30 climbs the inclined surface 26A,
It does not shift in the vehicle longitudinal direction.

At the center of the slider 30 in the longitudinal direction of the vehicle,
A screw hole 36 is formed. A seat track 38 on the outer side in the vehicle width direction is fixed to the screw hole 36 by a bolt 40.
And move integrally.

As shown in FIG. 1, the seat track 42 on the inner side in the vehicle width direction is connected to the floor pan 20 via a hinge 44 as a rotating means, and a pivot axis of the hinge 44 extending in the vehicle longitudinal direction. Is pivotable in the clockwise direction in FIG. The seat track 38 on the outer side in the vehicle width direction and the seat track 42 on the inner side in the vehicle width direction support the seat 46 so as to be slidable in the vehicle longitudinal direction. Accordingly, when the seat track 38 on the outer side in the vehicle width direction moves upward, the direction in which the seat 46 moves away from the side door 48 about the hinge 44 (the arrow B in FIG. 1).
Direction).

A well-known bulkhead 48 is provided at a position in the closed section 18 of the rocker 12 facing the seat mounting bracket 22 to prevent the section of the closed section 18 from collapsing. Also, the lower surface 20C of the floor pan 20
A cross member 50 is disposed in a portion facing the seat mounting bracket 22 along the vehicle width direction.

Next, the operation of this embodiment will be described. In the seat mounting structure of the present embodiment, when the other vehicle 60 shown in FIG. 1 collides with the vehicle body 10, the lower portion 48A of the side door 48 and the rocker 12 are pressed inward in the vehicle width direction. As a result, a part of the floor pan 20 is bent, and the seat mounting bracket 22 moves inward in the vehicle width direction as shown by the imaginary line in FIG. At this time, a load acts on the neck portion 32A of the connecting portion 32 of the slider 30 connecting the inclined portion 26 of the seat mounting bracket 22 and the seat track 38 on the outside in the vehicle width direction in the vehicle width direction. When this load exceeds a predetermined value, the neck 32A is broken and the connection is released, and the slider 30 moves substantially upward along the inclined surface 26A of the seat mounting bracket 22, as indicated by the imaginary line in FIG. The sheet track 38 on the outer side in the width direction moves substantially upward together with the slider 30.

As a result, the seat 46 is turned in the direction of arrow B in FIG. 1 around the turning axis of the hinge 44 provided at the joint between the seat track 42 and the floor pan 20 on the inner side in the vehicle width direction. Move. Therefore, the occupant seated on the seat 46 rotates together with the seat 46 in the direction of arrow B in FIG.
Move away from the inner side surface 48B of the side door 48. Further, the seat mounting structure of the present embodiment does not require an acceleration sensor, a trigger device, and the like, unlike the conventional structure.

Therefore, in the seat mounting structure of this embodiment,
The secondary collision time of the occupant can be delayed at a low cost, and the collision speed can be reduced.

Further, in the seat mounting structure of the present embodiment, a part of the collision energy is absorbed by breaking the neck 32A of the coupling portion 32 of the slider 30, and after the neck 32A is broken, the inclined surface 26A is broken. Thus, a part of the collision energy is absorbed by lifting the seat 46 and the occupant, so that the collision energy can be efficiently absorbed.

In the seat mounting structure of the present embodiment, the seat mounting bracket 2 having the wedge-shaped inclined portion 26 is provided.
2, it is possible to prevent the rocker 12 from falling around the joint with the floor pan 20 as a fulcrum.
This can prevent the reaction force from dropping sharply.

In the seat mounting structure of this embodiment, the substantially central portion 32B of the connecting portion 32 is welded to form the inclined portion 26.
However, the fixing of the connecting portion 32 to the inclined portion 26 is not limited to this, as long as the connecting is released when a load equal to or more than a predetermined value is applied. ,
The connection may be made by another connection means such as a bolt.

As shown in FIG. 4, the cross-sectional shape of the groove 28 of the inclined portion 26 as viewed from the vehicle width direction is an inverted T-shape, and the convex portion 34 engaging with the groove 28 is formed in the vehicle width direction. The cross section of the slider 30 has an inverted T shape, and the slider 30 has the inclined surface 26.
When moving on A, the slider 30 may be prevented from separating from the inclined surface 26A.

[0034]

The seat mounting structure according to the present invention includes a rocker disposed at the lower end on both ends in the vehicle width direction of the vehicle along the vehicle front-rear direction, and a rocker disposed inside the rocker in the vehicle width direction from the upper outside in the vehicle width direction. A seat mounting bracket having an inclined surface extending downward in the vehicle width direction, a seat track mounted on the lower left and right sides of the seat along the longitudinal direction of the vehicle, and a joint between the seat track and the vehicle body in the vehicle width direction. The connecting means is provided at a connecting portion between the turning means for turning the turning shaft in the vehicle front-rear direction and the seat track on the outer side in the vehicle width direction and the inclined surface of the seat mounting bracket, and the connection is released when a load exceeding a predetermined value is applied. And a coupling means that enables the seat track on the outer side in the vehicle width direction to move along the inclined surface.
There is an excellent effect that the secondary collision time of the occupant can be delayed at a low cost and the collision speed can be reduced. In addition, there is an excellent effect that the collision energy can be efficiently absorbed and the reaction force of the rocker at the time of a side collision can be prevented from sharply decreasing.

[Brief description of the drawings]

FIG. 1 is a front view showing a seat mounting structure according to one embodiment of the present invention.

FIG. 2 is an exploded perspective view showing a part of the seat mounting structure according to the embodiment of the present invention as viewed from the front inside the vehicle body.

FIG. 3 is a sectional view taken along line 3-3 in FIG. 2;

FIG. 4 is a cross-sectional view corresponding to FIG. 2 of a seat mounting structure according to another embodiment of the present invention.

FIG. 5 is a front view showing a seat mounting structure according to a conventional example.

FIG. 6 is a front view showing a seat mounting structure according to a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Body 12 Rocker 20 Floor pan 22 Seat mounting bracket 24 Mounting part 24A Floor mounting part 24B Rocker mounting part 26 Inclined part 26A Inclined surface 30 Slider (coupling means) 32 Coupling part 32A Neck 38 Seat track 42 Seat track 44 Hinge (rotation) means)

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B60N 2/42 B60R 21/16

Claims (1)

(57) [Claims] 1. A rocker disposed at both lower ends in the vehicle width direction of the vehicle body along the front-rear direction of the vehicle, and disposed inside the rocker in the vehicle width direction and extending from the upper outside in the vehicle width direction to the lower inner portion in the vehicle width direction. A seat mounting bracket having an inclined surface, a seat track attached to the lower left and right sides of the seat along the front and rear direction of the vehicle, and a rotation shaft provided at a connection portion between the vehicle and the inner side seat track and the vehicle body, and a rotating shaft provided in the front and rear of the vehicle. The coupling means is disengaged when a load equal to or greater than a predetermined value is provided at a connecting portion between a turning means directed in the direction and a seat track on the outer side in the vehicle width direction and the inclined surface of the seat mounting bracket. A coupling means for moving a seat track on the outer side in the direction along the inclined surface.