JPH1148843A - Seat mounting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce damage inflicted on occupant from rear end collision by allowing a mounting bracket for mounting a seat on a floor of a car body to relatively displace backward of the seat which receives inertia force of an occupant in the rear end collision. SOLUTION: A seat 1 is constituted of a seat back 2 for supporting the back side of an occupant and a seat cushion 3 for supporting his/her hip part, and is mounted on a seat rail 5 thorough a seat rail mounting bracket which is placed downward of the seat cushion 3. The seat rail 5 is mounted on a floor 7 of the body through seat mounting brackets 6a, 6b. In the rear end collision, the floor 7 mores forward, while the seat 1 intends to remain at an original position due to occupant's inertia. Then, reverse forces on the upper and lower sides of the seat mounting brackets 6a, 6b, they deform, the seat 1 can be relatively moved backward with respect to the floor 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seat for protecting an occupant by absorbing the impact of a rear-end collision.

[0002]

2. Description of the Related Art FIG. 4 shows a schematic structure of an automobile seat. As shown, the seat (1) is fixed to a seat rail (5) via a seat rail mounting bracket (4), and the seat rail (5) is body-mounted via a seat mounting bracket (6). Is fixed to the floor (7).

[0003]

As described above, in the prior art, since the seat (1) is rigidly connected to the floor (7), at the time of a collision, as shown in FIG. It acts directly on the human body through the route of and the occupant may be damaged. As a device for reducing such damage, there is a seat described in Japanese Utility Model Application Laid-Open No. 59-186157, which, when a rear-end collision occurs, lowers the seat back and simultaneously slides the seat cushion forward,
A complicated operation of absorbing a shock at that time by a damper is performed, and the structure becomes considerably complicated.

[0004] Even if such a means is not used, in general, when the impact at the time of a rear-end collision is large, it is considered that the components of the seat are deformed and absorb the impact, so that the damage to the occupant can be reduced. In this case, the deformation of the component parts may cause a behavior such as a tilt of the seat, which may impair the restraint of the human body.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a seat mounting structure which can reduce the damage to an occupant during a rear-end collision with a simple structure and which does not impair the restraint of the occupant.

[0006]

In order to achieve the above object,
In the seat mounting structure according to the present invention, the mounting bracket for mounting the seat on the floor of the vehicle body can be deformed so as to allow the rearward relative displacement of the seat under the inertia force of the occupant during the collision. .

The "mounting bracket" here includes a bracket for fixing the seat rail to the floor of the body (seat mounting bracket) and a bracket for mounting the seat to the seat rail (seat rail mounting bracket). Both are included.

If the mounting bracket is provided with a bending line in the vehicle width direction, the deformation in the above aspect can be easily realized. Note that one or a plurality of bending lines can be provided.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a preferred embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a side view showing a seat (1) according to the present invention and a mounting structure thereof. Seat (1)
Is comprised of a seat back (2) for supporting the occupant's back and a seat cushion (3) for supporting the buttocks, via a seat rail mounting bracket (not shown) disposed below the seat cushion (3). Seat rail (5)
Mounted on Also. The seat rail (5) is connected to the body floor (7) via seat mounting brackets (6a, 6b: hereinafter simply referred to as "mounting brackets").
Mounted on

The mounting brackets (6a) and (6b) are provided at four positions on the front, rear, left and right of the seat (1). Among them, the two front mounting brackets (6a) are formed in a substantially L-shaped cross section having one bending line (9a) extending in the vehicle width direction (vertical direction in the drawing) as shown in FIG. One piece is adhered to the lower surface of the seat rail (5), and the other piece is adhered to the step (7a) of the floor (7) and bolted to each.
On the other hand, the rear mounting bracket (6b) has two bending lines (9b) (9b) extending in the vehicle width direction as shown in FIG.
c), and is formed in a substantially Z-shaped cross section which is bent by reversing the bending direction at both bending lines (9b) and (9c). One of the upper and lower parallel pieces of the mounting bracket (6b) is bolted to the seat rail (5), and the other is bolted to the mounting portion (10) protruding from the seat rail (5) to the floor (7). It is fixed at a predetermined position.

In the above configuration, at the time of collision, the floor (7) moves forward, while the seat (1) tends to remain at the original position due to the inertia of the occupant. In this case, since the mounting brackets (6a) and (6b) have opposite (butting) forces acting on the upper side and the lower side, respectively, the mounting brackets (6a) and (6b) are shown in FIGS. As a result, the sheet (1) is transformed into the floor (7).
Relative to the rear. In this way, the mounting brackets (6a) and (6b) are connected to the seat (1) by the inertia force of the occupant.
By allowing the occupant to deform so as to allow the relative retreating motion, the impact at the time of the rear-end collision is absorbed, so that the occupant can be less damaged. Further, at this time, the seat (1) moves horizontally relative to the floor (7), so that the restraint of the occupant is not impaired.

The mounting brackets (6a) and (6b) have appropriate rigidity so that the seat can be securely fixed to the floor (7) except when the vehicle is to be hit by a collision. The shape, size, material, etc., are set so that they will not be deformed by an external force other than the above. In addition, by appropriately changing these, it is possible to control the relative movement amount (stroke amount) of the seat (1) at the time of a rear-end collision. it can.

The present invention is not limited to the above-mentioned bracket for fixing the seat rail (5) to the floor (7) (brackets 6a and 6b for mounting the seat), but also to the seat (1) for the seat rail (5). ) Can be applied in the same manner to the bracket for mounting the bracket (seat rail mounting bracket 4: see FIG. 4). The shape of these brackets is, of course, not limited to those shown.

[0015]

According to the present invention, the mounting bracket can be deformed in a direction allowing relative displacement of the seat rearward, so that the impact at the time of a rear-end collision can be absorbed with a simple structure, and the occupant can be absorbed. The damage received can be reduced. Further, since the seat moves substantially horizontally, the restraint of the occupant is not impaired.

[Brief description of the drawings]

FIG. 1 is a side view showing a seat mounting structure according to the present invention.

FIG. 2 is an enlarged side view of the front and rear mounting brackets before a collision.

FIG. 3 is an enlarged side view of the front and rear mounting brackets after a collision.

FIG. 4 is a schematic side view showing a general mounting structure of a conventional seat.

FIG. 5 is a diagram showing the order of transmission of impact at the time of a rear-end collision.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Seat 2 Seat back 3 Seat cushion 4 Mounting bracket (Seat rail mounting bracket 5 Seat rail 6a / 6b mounting bracket (Seat mounting bracket) 7 Floor

Claims (2)

[Claims] 1. A seat mounting structure in which a mounting bracket for mounting a seat on a floor of a vehicle body is deformable so as to allow a relative rearward displacement of the seat subjected to an inertia force of an occupant during a rear-end collision. 2. The seat mounting structure according to claim 1, wherein a bending line in the vehicle width direction is provided on the mounting bracket.