JPH0523232A - Spring member attaching structure for vehicle seat - Google Patents

Abstract

PURPOSE:To enhance the assembling ability of a spring member onto a seat back frame, and to enhance the strength of a spring attaching part of the seat back frame. CONSTITUTION:A seat back frame 12 for a seat back 10 is formed by casting, and a spring attaching seat 30 is provided in a frame part 20 of a base part 12A of the seat back frame 12. A bolt attaching hole 40 is formed in the spring attaching seat 30, and a stepped bolt is screwed into the bolt attaching hole 40. A cushion for the seat back is constituted by a cloth spring having an engaging part for the spring attaching part is engaged with the stepped bolt. A first hub part 32 serving as a reinforcement for the connection between the spring attaching seat 30 and a longitudinal wall part 24 is integrally incorporated between the spring attaching seat 30 and the longitudinal wall part 24, and an access hole 34 is formed in this first hub part 32.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spring material mounting structure for a vehicle seat that is mounted on a vehicle such as an automobile.

[0002]

2. Description of the Related Art Conventionally, a seat spring has been used as a spring member to be mounted on a seat back portion of a vehicle seat mounted on a vehicle such as an automobile. An example of a structure for mounting this seat spring is shown in FIG. 6B, a spring set plate 72 as shown in FIG. 6B is welded to a seat back frame 70 made of a pipe material, and a hook portion 72A of the spring set plate 72 is attached to the end of the seat spring 74. A structure in which the portion 74A is engaged is known.

As another example of the seat spring mounting structure, as shown in FIG. 7 (A), a side portion 80A of a seat back frame 80 made of a plate material, as shown in FIG. 7 (B), is used. A cut-and-raised portion is provided as a spring engaging portion 82, and the end portion 74 of the seat spring 74 is attached to the spring engaging portion 82.
A structure in which A is engaged is known.

In these seat spring attachment structures, the set load of the seat spring 74 is relatively low, and it is easy to attach the seat spring 70 to the seat back frame 70 or the seat back frame 80.

[0005]

However, in order to improve the riding comfort of the vehicle, a cloth spring made of elastic fiber is used instead of the seat spring, and the cloth spring is attached to the seat back frame. In the spring material mounting structure, the elongation rate of the cloth spring is lower than that of the seat spring,
In order to provide a predetermined tension, the load of setting the cloth spring on the seat back frame becomes high. Therefore, the workability of assembling the cloth spring to the seatback frame is deteriorated, and the strength of the cloth spring attachment portion of the seatback frame is insufficient.

In consideration of the above facts, the present invention can improve the workability of assembling the spring material to the seat back frame and can improve the strength of the spring material mounting portion of the seat back frame. The purpose is to obtain a spring material mounting structure.

[0007]

According to a first aspect of the present invention, a seat back frame integrally formed by casting and a cloth spring made of elastic fiber are provided, and the seat back frame is provided along an outer peripheral portion of the seat back frame. Provided on the seat back frame, a vertical wall portion, a spring mounting pedestal for mounting an engaging member provided inside the vertical wall portion of the seat back frame for engaging the cloth spring, A reinforcing portion that connects the spring mounting pedestal and the vertical wall portion, and has a reinforcing portion in which the work hole for mounting the cloth spring is bored between the spring mounting pedestal and the vertical wall portion. There is.

[0008]

According to the invention described in claim 1, a rod-shaped member such as the tip of a driver is engaged with the work hole provided in the reinforcing portion, and the rod-shaped member is used as a lever to be provided in the cloth spring. The hook portion can be engaged with the engaging member attached to the spring mounting base. Therefore, the workability of assembling the cloth spring to the seat back frame can be improved. Further, since the spring mounting base of the seatback frame and the vertical wall portion are connected by the reinforcing portion, the strength of the spring material mounting portion of the seatback frame can be improved.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a spring seat mounting structure for a vehicle seat according to the present invention will be described with reference to FIGS.

As shown in FIG. 1A, the seat back frame 12 of the seat back 10 to which the spring seat mounting structure for a vehicle seat of this embodiment is applied is a high back type having a head restraint portion 14. It is formed by die-casting, casting or the like using a metal such as aluminum or magnesium.

A pair of reclining mounting portions 16 are provided at both widthwise ends of the lower end portion of the seat back 10. Mounting holes 18 are formed in the reclining mounting portions 16, respectively, and a rear portion of a seat cushion (not shown) is mounted by bolts (not shown) and nuts (not shown) inserted into the mounting holes 18. It is attached to the reclining mechanism provided in the.

The base portion 12A of the seat back frame 12 that supports the head, back and waist of the occupant includes a frame portion 20 and a plurality of beam portions 22 provided on the frame portion 20 along the width direction of the seat. It is composed of. Further, the outer peripheral portion of the frame portion 20 is projected toward the front of the seat to form a vertical wall portion 24, and the inner peripheral portion of the frame portion 20 and the edge portion of the beam portion 22 are substantially forward toward the front of the seat. The flange 23 is continuously projected at a constant height. The height L of the vertical wall portion 24 is from the reclining attachment portion 16 to the head restraint portion 1.
The height suddenly increases toward the 4th side and reaches the maximum height L1 at the part corresponding to the waist of the occupant, and then gradually decreases toward the head restraint portion 14 side, and the minimum height L2 at the head restraint portion 14 is reached. Is becoming

In the portion of the vertical wall portion 24 of the seat back frame 12 excluding the head restraint portion 14, the front end portion of the vertical wall portion 24 is curved in a U-shape toward the outside of the seat and is formed with a cover fixing groove 25. As shown in FIG. 2, a plate-shaped engaging piece 27A attached to an end of the cover 27 of the seat back is engaged with the cover fixing groove 25.

A side frame 26 is integrally formed in the vicinity of the maximum height L1 of the vertical wall portion 24 of the seat back frame 12, and the side frame 26 has a lateral U-shape in a side view. The curved portion is directed forward.

As shown in FIG. 5, the side frame 26 may be separate from the seat back frame 12. In this case, the side frame 26 is made of a bar material made of metal such as aluminum or magnesium, and the pins 26 formed at both ends of the side frame 26.
A is inserted into the mounting hole 13 of the seat back frame 12, and the tip of the mounting leg 26B extending from the substantially central portion of the side frame 26 is fixed to the screw hole 17 of the seat back frame 12 with the bolt 15.

A plurality of spring mounting bases 30 are provided on the frame portion 20 of the base portion 12A of the seat back frame 12. These spring mounting pedestals 30 are integrally formed at predetermined intervals along the vertical wall portion 24 in the portion of the seat back frame 12 excluding the head restraint portion 14.

As shown in FIG. 1 (B), a bolt mounting hole 40 is formed in the spring mounting base 30 at a substantially central portion thereof. A threaded portion is formed on the inner peripheral portion of the bolt mounting hole 40, and a stepped bolt 42 is screwed into the threaded portion as shown in FIG.

As shown in FIG. 4, the cushion of the seat back is made up of cloth springs 44 made of elastic fibers, and spring fittings 46 made of hard steel wire are provided at both widthwise ends of the cloth springs 44. Are attached by stitching or welding the cloth springs 44. As shown in FIG. 3, the spring mounting member 46 is provided with engaging portions 46A that are formed in a U-shape at a predetermined interval so as to be bent toward the side opposite to the cloth springs 44 and face the engaging portions 46A. The part of the cloth spring 44 is notched in a rectangular shape on the side opposite to the engaging part 46A.
It is set to 4A. Further, as shown in FIG. 2, the engaging portion 46 A of the spring mounting member 46 is the step portion 42 of the step bolt 42.
It is engaged with A.

A first hub portion 32 is integrally formed between the spring mounting pedestal 30 and the vertical wall portion 24 as a reinforcing portion for connecting the spring mounting pedestal 30 and the vertical wall portion 24. The first hub portion 32 has a gentle arc shape that is convex downward, and a substantially central portion of the first hub portion 32 has a rectangular cross section as shown in FIG. 1 (B). A working hole 34, which is a concave portion having a shape, is formed. A second hub portion 36 that connects the spring attachment pedestal 30 and the flange 23 is integrally molded between the spring attachment pedestal 30 and the flange 23, and the second hub portion 36 faces downward. It has a gentle arc shape that is convex.

Next, the operation of this embodiment will be described.
In this embodiment having the above-described structure, as shown in FIG. 3, the driver 4 is attached to the engaging portion 46A of the spring mounting member 46 of the cloth spring 44.
A rod-shaped member such as the tip end portion 48A of No. 8 is inserted, and the tip end portion 48A of the driver 48 is inserted and engaged with the working hole 34 provided in the first hub portion 32. From this state (state of FIG. 3), the tip portion 48 of the driver 48 is used as a lever,
The driver 48 is rotated in the outer direction of the seat back frame 12 (direction of arrow A in FIG. 3). As a result, the engaging portion 4 of the spring mounting member 46 is resisted against the tensile force of the cloth spring 44.
6A is a stepped bolt 42 provided on the spring mounting base 30.
It can be easily engaged with the stepped portion 42A. Therefore, the workability of assembling the fabric spring 44 to the seat back frame 12 can be improved.

Further, since the spring mounting base 30 of the seat back frame 12 and the vertical wall portion 24 are connected by the first hub portion 32, the strength of the spring mounting base 30 of the seat back frame 12 can be improved. it can.

Further, in this embodiment, unlike the structure shown in FIG. 7A in which the spring engaging portion 82 is provided by cutting and raising, a hole may be formed on the outer wall surface of the seat back frame. In addition, the appearance quality is not deteriorated even when the seat back frame has an external design. Further, in the present embodiment, since the seat back frame 12 is formed by casting, there is a degree of freedom in the position of the spring mounting base 30, and an appropriate spring surface can be obtained.

In this embodiment, the seat back frame 12 is of the high back type having the head restraint portion 14, but instead of this, the seat back frame is of the low back type in which the head restraint portion is separated. Is also good.

[0024]

Since the present invention has the above-mentioned structure, the workability of assembling the spring member to the seat back frame can be improved and the strength of the spring member mounting portion of the seat back frame can be improved. Has excellent effect.

[Brief description of drawings]

FIG. 1A is a perspective view of a seat back frame to which a spring material mounting structure for a vehicle seat according to an embodiment of the present invention is applied, as seen from an oblique front side, and FIG. FIG.

2 is a sectional view taken along line 2-2 of FIG.

FIG. 3 is an operation explanatory diagram of attaching a cloth spring to a seat back frame to which a spring material mounting structure for a vehicle seat according to an embodiment of the present invention is applied.

FIG. 4 is a perspective view showing a cloth spring applied to a spring seat mounting structure for a vehicle seat according to an embodiment of the present invention, as viewed from an oblique front side.

FIG. 5 is a perspective view showing a seat back frame to which a spring seat mounting structure for a vehicle seat according to another embodiment of the present invention is applied, as seen from diagonally front.

FIG. 6A is a perspective view of a seat back frame to which a conventional spring mounting structure for a vehicle seat is applied, as seen from an oblique front side, and FIG. 6B is a BB line of FIG. FIG.

FIG. 7A is a perspective view of a seat back frame to which another conventional spring seat mounting structure for a vehicle seat is applied, as seen from an oblique front side, and FIG. It is a B line sectional view.

[Explanation of symbols]

 10 seat back 12 seat back frame 12A base portion 20 frame portion 22 beam portion 24 vertical wall portion 30 spring mounting pedestal 32 first hub portion (reinforcing portion) 34 working hole 40 bolt mounting hole 42 stepped bolt (engaging member) 44 Cloth spring 46 Spring mounting bracket

Claims (1)

Claim: What is claimed is: 1. A seat back frame integrally formed by casting, a cloth spring made of elastic fiber, and a vertical wall portion provided along an outer peripheral portion of the seat back frame. A spring mounting pedestal provided inside the vertical wall portion of the seat back frame for mounting an engaging member for engaging the cloth spring; and a spring mounting pedestal provided on the seat back frame and the vertical A spring member for a vehicle seat, comprising: a reinforcement portion that connects a wall portion and a work hole for attaching the cloth spring is provided between the spring attachment base and the vertical wall portion. Mounting structure.