JPH04107121U - Seat mounting structure - Google Patents

Abstract

(57) [Summary] [Purpose] To efficiently absorb the impact force input from the seat belt during a vehicle collision, thereby reducing the weight of the seat frame, mounting bracket, etc., and reducing the cost of the seat. [Structure] In the mounting structure of the rear bench seat 3, the after frame 22 of the seat frame 21 and the mounting bracket 28 for attaching the after frame 22 to the vehicle body.
The connection portion between the seat frame 21 and the mounting bracket 28 is made rotatable around an axis along the longitudinal direction of the vehicle by the connection bolt 30, and the connection portion is rotated relative to the mounting bracket 28 by the load applied to the seat frame 21 during a vehicle collision. Only tensile stress is applied to.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention is mainly used for bench seats installed in one-box type vehicles. Regarding attached structure.

0002

[Conventional technology]

Figure 3 shows a typical front seat and rear seat, and Figure 4 shows a conventional rear seat. indicates a frame.

0003 As shown in Figure 3, in one-box type vehicles, the front Seats 1 and 2 and a rear seat 3 are provided, and the rear seat 3 is a bench seat. It has become. Front seats 1 and 2 are seats attached to the bottom of the seat. It can be adjusted forward and backward using the slide 4. On the other hand, rear seat 3 is fixed to the vehicle body. has been done. In addition, each seat 1, 2, 3 is provided with a seat belt device 5, 6, 7. It is being

0004 In the rear seat 3, as shown in Fig. 4, the seat body (not shown) has a seat flap. Supported by frame 8. This seat frame 8 is the outer periphery of the seat body. The main frame 9 has a U-shape in plan view and is fixed along the main frame 9. A cross member that is connected to the frame 9 and fixed to the rear of the seat body. A sensor connecting the lid frame 10, the main frame 9, and the after frame 10 It consists of a data frame 11. The front part of the seat frame 8 is the main frame. Front bracket 12 and mounting bolts connected to both sides of frame 9 by welding 13 is fixed to the vehicle body. In addition, the rear part of the seat frame 8 is after-flex. The rear bracket 14 and mounting bolts 15 are connected to the frame 10 by welding. is fixed to the vehicle body.

[0005] Such a seat belt device 7 for the rear seat 3 includes three seat belts 16, 1. 7 and 18 are provided. And seats provided on both sides of the rear seat 3 One end of the belts 16 and 18 is connected to the vehicle body, and the other end is connected to the seat frame 8. The seat belt 17 at the center of the rear seat is connected to the seat frame 8 at both ends. has been done. Therefore, as shown in FIG. 4, after frame 1 of seat frame 8 0 is a mounting bracket 19 to which the ends of each seat belt 16, 17, and 18 are connected. Four are fixed.

[0006]

[Problem that the idea aims to solve]

By the way, the seatbelt device cannot be thrown out of the vehicle by the occupant in the event of a vehicle collision. Preventing it from being released. In the event of a collision, the seatbelt system A maximum impact force of about 2 tons is applied.

[0007] In the conventional seat mounting structure described above, as shown in Figure 5, each seatbelt is The impact force acting on the seats 16, 17, and 18 is transferred to the seat frame via the mounting bracket 19. act on the frame 8 and is transmitted to the after frame 10 in this seat frame 8. The load P acts on the vehicle body via the rear bracket 14.

[0008] This impact force P normally acts forward and upward, and when it occurs, it The after frame 10 is deformed as shown by the two-dot chain line. In this case, after Tensile stress and torsional stress are applied to the welded part between the frame 10 and the rear bracket 14. There is a risk that the welded joint will be destroyed.

[0009] When installing a seat, a certain level of strength is required based on vehicle safety standards. Therefore, in the past, in order to meet this safety standard, the thickness of each member was increased, A reinforcing member must be provided separately, which increases the weight of the entire seat. There was a problem that it became a high-cost sheet. .

0010 This invention is intended to solve these problems, and is designed to act on seat belts. We offer a seat mounting structure that efficiently absorbs loads and reduces weight and cost. The purpose is to provide

[0011]

[Means to solve the problem]

The seat mounting structure of the present invention to achieve the above-mentioned purpose is At the same time, both sides of the seat frame that supports the seat body are attached via the mounting members. In the mounting structure of the seat attached to the vehicle body, the seat frame and the mounting portion The connecting part with the material is rotatable around an axis along the longitudinal direction of the vehicle. It is.

0012

[Effect]

The rotatable connection between the seat frame and the mounting member prevents vehicle collisions. When the load is input from the seat belt to the seat frame, the seat frame deformation, but only tensile stress is applied to the connection between the seat frame and the mounting member. The Rukoto.

[0013]

【Example】

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

[0014] Figure 1 shows the mounting structure of a seat according to an embodiment of the present invention, and Figure 2 shows the operating source when a load is input. Show the truth.

[0015] As shown in FIG. 1, the after frame 22 of the seat frame 21 has a box-shaped cross section. However, the end portion of the main frame 23 is connected to the end portion by welding. Also, a A mounting piece 24 is integrally formed at the end of the lid frame 22, and this mounting piece 24 has a A mounting hole 25 is drilled through the vehicle in the longitudinal direction. Furthermore, this after-flare A plurality of (one in the illustration) seat belt mounting brackets 26 are fixed to the seat belt mounting bracket 22. ing.

[0016] On the other hand, it is attached to the vehicle body as a seat frame attachment member using fixing bolts 27. A bracket 28 is fixed to the mounting bracket 28. A mounting hole 29 is drilled therein.

[0017] Therefore, the after frame 22 of the seat frame 21 has the mounting hole 25 connected to the mounting bracket. Match the position with the mounting hole 29 of the nut 28, and pass through the connecting bolt 30 and nut 31. It is connected to this mounting bracket 28 by attaching it to the vehicle body. The Rukoto.

[0018] Therefore, in the seat mounting structure of this embodiment described above, the seat is When an impact force is applied to the belt, as shown in FIG. Both forward and upward loads act. Then, the after frame 22 is attached to the mounting bracket. It deforms by warping upward using the connection part with the bracket 28 as a fulcrum. At this time, after The frame 22 is centered on the axis O of the connecting bolt 30 at the connecting part of the mounting bracket 28. Rotate upward as the mind.

[0019] Therefore, a tensile load is applied to the connection between the after frame 22 and the mounting bracket 28. Therefore, stress concentration can be prevented. Therefore, the input load The weight can be received efficiently, and each member around this connecting member can be There is no need to increase the plate thickness or provide additional reinforcing members.

[0020] In addition, in the above-mentioned embodiment, the rear seat 3 is fixed to the vehicle body. The seat mounting structure of the present invention is limited to this vehicle. For example, if the seat is attached to and detached from the vehicle body using a locking device. Even if the seat mounting structure of the present invention is applied to a In addition to being effective, it is also possible to sufficiently secure the locking of the locking device. Wear.

[0021]

[Effect of the idea] As described above in detail with examples, the seat mounting structure of the present invention For example, between a seat frame and a mounting member for attaching this seat frame to the vehicle body. The connecting part can be freely rotated around an axis along the longitudinal direction of the vehicle, so the seat can be secured in the event of a vehicle collision. Installation of a seat frame that deforms due to the load input to the seat frame By rotating relative to the member, only tensile stress will be applied to the connection. Ru. As a result, the impact force at the time of a vehicle collision is not effectively absorbed, and the seat cushion It is possible to reduce the weight of the frame and mounting components, as well as reduce the cost of the seat. can be done.

[Brief explanation of 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 a diagram showing the principle of operation when a load is applied to the connecting portion of the seat frame.

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

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

FIG. 5 is a diagram showing the principle of operation when a load is applied to the seat frame in a conventional seat mounting structure.

[Explanation of symbols]

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 Connection bolt 31 Nut

Claims (1)

[Scope of utility model registration request] 1. A seat mounting structure in which a seat belt is attached and both sides of a seat frame that supports a seat body are attached to a vehicle body via mounting members, wherein a connecting portion between the seat frame and the mounting member is provided. A seat mounting structure characterized by being rotatable around an axis along the longitudinal direction of a vehicle.