JP2578111Y2 - 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 mounting structure of a bench seat mainly mounted on a one-box type vehicle or the like.

[0002]

2. Description of the Related Art FIG. 3 shows a general front seat and rear seat, and FIG. 4 shows a conventional rear seat frame.

As shown in FIG. 3, in a one-box type vehicle, front seats 1, 2 and a rear seat 3 are provided in a vehicle interior, and the rear seat 3 is a bench seat. The front seats 1 and 2 can be adjusted back and forth by a seat slide 4 attached to a lower portion of the seat. On the other hand, the rear seat 3 is fixed to the vehicle body. The seats 1, 2, and 3 are provided with seat belt devices 5, 6, and 7, respectively.

In the rear seat 3, a seat body (not shown) is supported by a seat frame 8, as shown in FIG. The seat frame 8 includes a main frame 9 fixed along an outer peripheral portion of the seat body and having a U-shape in plan view, and a cross member connected to the main frame 9 and fixed to a rear portion of the seat body. It comprises an after frame 10 and a center frame 11 connecting the main frame 9 and the after frame 10. The front bracket 1 has a front portion joined to both sides of the main frame 9 by welding.
It is fixed to the vehicle body by 2 and mounting bolts 13. The seat frame 8 is fixed to the vehicle body by a rear bracket 14 and a mounting bolt 15 whose rear portion is joined to the after frame 10 by welding.

[0005] The seat belt device 7 for the rear seat 3 is provided with three seat belts 16, 17, 18. The seat belt belts 16 and 18 provided on both sides of the rear seat 3 have one end connected to the vehicle body and the other end connected to the seat frame 8, respectively, and the seat belt 17 at the center of the rear seat is connected to the seat frame 8 at both ends. . Accordingly, as shown in FIG. 4, each seat belt 16, 1,
Four mounting brackets 19 to which the ends of 7 and 18 are connected are fixed.

[0006]

The seat belt device prevents the occupant from being thrown out of the vehicle at the time of a vehicle collision or the like. At the time of the collision of the vehicle, an impact force of about 2 tons acts on the seat belt device at the maximum.

In the above-described conventional seat mounting structure, as shown in FIG.
The impact force acting on the seat frame 8 acts on the seat frame 8 via the mounting bracket 19, and the load P transmitted to the after frame 10 in the seat frame 8 acts on the vehicle body via the rear bracket 14.

The impact force P normally acts forward and upward, and when generated, deforms the after-frame 10 as shown by a two-dot chain line in FIG. In this case, the tensile stress and the torsional stress concentrate on the welded portion between the after-frame 10 and the rear bracket 14, and there is a possibility that the connection by this welding may be broken.

In mounting the seat, a predetermined strength is required based on vehicle safety standards. For this reason, conventionally, in order to meet this safety standard, it is necessary to increase the thickness of each member or separately provide a reinforcing member, which increases the weight of the entire seat and increases the cost of the seat. There was a problem that would be.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to provide a seat mounting structure capable of efficiently receiving a load acting on a seat belt and reducing the weight and cost. And

[0011]

In order to achieve the above-mentioned object, the seat mounting structure of the present invention has a structure in which a seat belt is mounted and both sides of a seat frame supporting a seat body are mounted on a vehicle body via mounting members. in the mounting structure of a seat attached to, the seat frame a connecting portion between the seat frame which is disposed along the vehicle width direction and the attachment member
Position substantially on the center axis of the
The axis of rotation of the system is orthogonal to the center axis along the front-back direction
It is characterized by being rotatable as described above .

[0012]

[Action] The seat frame and the mounting member along the vehicle width direction
Position approximately on the center axis of this seat frame
And the pivot axis of the seat frame is the central axis.
The load input from the seat belt to the seat frame during a vehicle collision can be supported by the seat frame about the rotation axis.
As a result, only the tensile stress acts on the connecting portion between the seat frame and the mounting member.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the drawings.

FIG. 1 shows a seat mounting structure according to an embodiment of the present invention, and FIG. 2 shows an operation principle when a load is input.

As shown in FIG. 1, the after frame 22 of the seat frame 21 has a box-shaped cross section, and the end of the main frame 23 is joined to the end by welding. At the end of the after frame 22, a mounting piece 24 is integrally formed, and the mounting piece 24 is provided with a mounting hole 25 penetrating in the vehicle front-rear direction. Further, a plurality of (one in the figure) seat belt mounting brackets 26 are fixed to the after frame 22.

On the other hand, a mounting bracket 28 as a seat frame mounting member is fixed to the vehicle body by a fixing bolt 27, and a mounting hole 29 penetrating in the vehicle front-rear direction is formed in the mounting bracket 28.

Thus, the mounting frame 25 of the seat frame 21 is attached to the mounting hole 2 of the mounting bracket 28.
9 and is connected to the mounting bracket 28 by penetrating the connecting bolt 30 and the nut 31, thereby being mounted on the vehicle body.

Therefore, in the above-described seat mounting structure of the present embodiment, when an impact force acts on the seat belt at the time of a vehicle collision, as shown in FIG.
A load is applied to the front and upward of the vehicle. Then, the after frame 22 is deformed by warping upward with the connecting portion with the mounting bracket 28 as a fulcrum. At this time, the after frame 22 rotates upward about the axis O of the connecting bolt 30 at the connecting portion of the mounting bracket 28.

Therefore, only the tensile load acts on the connecting portion between the after-frame 22 and the mounting bracket 28, so that stress concentration can be prevented. Therefore, the input load can be efficiently received, and it is not necessary to increase the plate thickness of each member around the connecting member and to provide another reinforcing member as in the related art.

In the above-described embodiment, a vehicle in which the rear seat 3 is fixed to the vehicle body has been described. However, the seat mounting structure of the present invention is not limited to this. Even when the seat mounting structure of the present invention is applied to a device that is detachably provided to the vehicle body by the device, the above-described operation and effect can be obtained, and the locking and holding of the locking device can be sufficiently ensured.

[0021]

As described above, according to the seat mounting structure of the present invention, as described in detail with reference to the embodiments, the seat mounting structure in the vehicle width direction
The connection between the seat frame and the mounting member
Place it approximately on the center axis of the frame, and
The rotation axis of the frame is perpendicular to the center axis
Since the rotatably so that, by load input from the seat belt during a collision of the vehicle seat frame by rotating the mounting member that the seat frame is deformed, and its connecting portion tensile stress Only works. As a result, it is possible to efficiently receive the impact force at the time of a vehicle collision, to reduce the weight of the seat frame and the mounting member, and to reduce the cost of the seat.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view of a seat frame connecting portion showing a seat mounting structure according to an embodiment of the present invention.

FIG. 2 is an operation principle diagram when a load acts on a connecting portion of a seat frame.

FIG. 3 is a perspective view of a general sheet.

FIG. 4 is a perspective view of a conventional seat frame.

FIG. 5 is an operation principle diagram when a load acts on a seat frame in a conventional seat mounting structure.

[Explanation of symbols]

 Reference Signs List 21 seat frame 22 after frame 23 main frame 24 mounting piece 25, 29 mounting hole 26 seat belt mounting bracket 28 mounting bracket 30 connecting bolt 31 nut

Claims (1)

(57) [Scope of request for utility model registration] 1. A mounting structure of a sheet both sides is attached to the vehicle body through a mounting member of the seat frame for supporting the seat body with the seat belt is worn, the car
Ho the connection portion between the intake <br/> member with said seat frame which is disposed along the width direction on the central axis of the seat frame
And the rotation axis of the seat frame is
A seat mounting structure characterized in that the seat mounting structure is rotatable so as to be orthogonal to the center axis along the front-rear direction .