JPH1035338A - Suspension mechanism of car seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the application of the excessive external force which wrenches a gas damper attachment part, by displacing a seat on the straight. SOLUTION: A fixed frame 7 is installed on an upper rail 6 of a seat track 4 fixed to a car side, in such manner that the fixed frame 7 is inclined slightly upward. A seat back 1b of a seat 1 is attached to the fixed frame 7 movably on the straight in the up-and-down direction through an elevation guide 9 comprising a fixed rail and a movable rail engaged with each other. A torsion bar 13 is installed between the fixed frame 7 and a seat cushion 1a, a gas damper 17 is installed between the fixed frame 7 and the seat back 1b, to form a suspension mechanism which can be stroked on the straight.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat suspension mechanism mainly used for industrial vehicles such as forklifts.

[0002]

2. Description of the Related Art In the case of an industrial vehicle such as a forklift, unlike a normal automobile, a suspension mechanism is not provided between a tire and a vehicle body. Therefore, by providing the suspension mechanism on the seat side, the ride comfort of the worker is improved. FIG. 5 shows a seat provided with a conventional suspension mechanism applied to a forklift.

[0003] As shown in the figure, a seat 31 is provided on a seat frame 32 formed in a substantially L-shape and a seat cushion 33 is provided.
And the seat back 34 are assembled. A lower rail 36 of a seat track 35 is fixed to the upper surface of the vehicle body, and a fixed frame 38 for supporting the seat is provided on the upper rail 37 of the seat track 35 so as to extend slightly obliquely upward.
The seat frame 32 is attached to the upper rail 37 via the upper link 39 and the lower link 40 so as to be vertically movable.

Further, in order to support the load applied to the seat 31 and to obtain a required cushion feeling, a tension coil spring 41 is used.
Is provided. One end of the tension coil spring 41 is connected to the fixed frame 38 and the other end is connected to the seat frame 32, and supports the seat 31 in a suspended manner. Further, a gas damper 42 for obtaining a damping force for the expansion and contraction operation of the extension coil spring 41 is provided. The gas damper 42 has one end fixed to the fixed frame 38 and the other end fixed to the seat frame 32 by screwing via a rubber bush 43 as shown in FIG. That is,
The conventional suspension mechanism is constituted by a combination of a four-link mechanism, a tension coil spring 41 and a gas damper.

[0005]

However, in the case of the above-mentioned conventional seat with a suspension mechanism, the seat 31 is not provided.
Is a circular locus determined by the link mechanism, so that the gas damper 42 that expands and contracts linearly exerts an unreasonable external force such as prying on the mounting portion of the screwing structure. Incidentally, the commercially available gas damper 42 has an attachment structure using screws. Therefore, conventionally, the rubber bush 43 is interposed in the mounting portion of the gas damper 42, and the elastic deformation of the rubber bush 43 copes with the circular motion. However, the rubber bush 43 is damaged early by the repetition of the operation. There is a problem that. Further, in order to establish the link mechanism, a considerably large space is required between the back surface of the seat back 34 and the fixed frame 38.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a suspension mechanism for a vehicle seat capable of linearly displacing the seat to solve the above-mentioned disadvantage. Is to eliminate it.

[0007]

Means for Solving the Problems In order to solve the above problems, the present invention is configured as follows. That is, the invention according to claim 1 is a suspension mechanism for a vehicle seat, wherein the seat is attached to a fixed member fixed to the vehicle body side via a lifting guide so as to be linearly movable in the vertical direction, and the fixed member and the seat cushion are attached. And a gas damper is disposed between the fixing member and the seat back.

According to the first aspect of the present invention, a suspension mechanism capable of linearly displacing the seat can be provided, so that the mounting mechanism of the gas damper performing the linear motion is pryed. It is possible to prevent such external force from acting and to protect the mounting portion. Further, since the linear displacement of the seat is established, the space between the fixing member and the seat back can be reduced.

According to a second aspect of the present invention, in the vehicle seat suspension mechanism according to the first aspect, the elevating guide comprises a fixed rail and a movable rail which are slidably fitted to each other. I do. When such a configuration is adopted, stability and smoothness can be obtained with respect to vertical movement.

According to a third aspect of the present invention, in the vehicle seat suspension mechanism according to the first or second aspect, the elastic body is formed of a torsion bar, and the torsion bar is provided with one of the fixed member and the seat cushion. One is fixed and the other is movably engaged. According to such a configuration, the space between the fixing member and the seat cushion does not increase. In addition, it is possible to establish a suspension mechanism that allows linear displacement of the seat after easily setting the required elastic force.

[0011]

Embodiments of the present invention will be specifically described below with reference to the drawings. FIG. 1 is a side view showing a suspension mechanism for a vehicle seat according to this embodiment,
2 is a detailed view of a portion A in FIG. 1, FIG. 3 is an exploded perspective view of a suspension mechanism, and FIG. 4 is a cross-sectional view showing a mounting portion of a gas damper.

The suspension mechanism for a vehicle seat according to this embodiment includes an elevating guide 9 and a gas damper 17 on the seat back 1b side of the seat 1 and an elastic body on the seat cushion 1a side of the seat 1. This is achieved by disposing the torsion bar 13. The seat 1 includes a seat frame 2 as a structural member of a skeleton formed in a substantially L shape in side view.
Pads are attached to the horizontal portion 2a and the upright portion 2b, respectively, to form a seat cushion 1a and a seat back 1b.

The body 3 of an industrial vehicle such as a forklift
(Specifically, the top of the engine hood or battery hood)
, A pair of left and right seat tracks 4 for adjusting the front and rear positions of the seat 1 is attached. Seat truck 4 is body 3
The lower rail 5 is fixed to the lower rail 5 and the upper rail 6 is slidably fitted to the lower rail 5. Left and right fixed frames 7 extending diagonally upward are fixed to the upper rail 6. As shown in FIG. 3, the left and right fixed frames 7 extend horizontally, and three upper, middle, and lower tie bars 8 are provided.
are interconnected by a, 8b, 8c. In this embodiment, the seat track 4 and the fixing frame 7 constitute a substantially L-shaped fixing member in a side view.

As shown in FIG. 1, the seat 1 is disposed above a fixed member, and is supported by a lifting guide 9 disposed between the seat back 1b and the fixed frame 7 so as to be able to move linearly in the vertical direction. . The elevating guide 9 comprises two right and left fixed rails 10 each having a substantially C-shaped cross section, and a movable rail 11 having a substantially hat-shaped cross section which is slidably fitted to each of the fixed rails 10. 10
Is connected to the upper portion of the fixed frame 7 and the intermediate tie bars 8a and 8b by a plurality of screws 10a. Fixed.

A torsion bar 13 is provided between the upper rail 6 and the horizontal portion 2a of the seat frame 2 to support the load applied to the seat 1 and to obtain a required cushion feeling. The torsion bar 13 is formed in a substantially crank shape in a top view, and the upper portion 13a is slidably fitted in a U-shaped groove of a substantially U-shaped mounting bracket 14 provided on a front end edge of the seat frame 2 as shown in FIG. The lower part 1 is held together by the cut-and-raised claws 14a.
The clamp 3 is immovably fixed to the upper rail 6 with a screw 16a while the 3b side is locked in a notch 15 provided on the upper surface of the front end of the upper rail 6.

A gas damper 17 for obtaining a damping force is provided in the middle of the left and right elevating guides 9, that is, at the center in the width direction of the seat 1, in a vertical direction in parallel with the elevating guide 9. As shown in FIG. 4, the gas damper 17 has a screw portion 17 a provided at a base end portion and a nut 19 through a rubber bush 18 with respect to a lower tie bar 8 c of the fixed frame 7.
And a screw portion 17b at the upper end (rod end) is fixed to a bracket 20 fixed to a tie bar 12b laid on the front side of the upright portion 2b of the seat frame 2 with a nut 22 via a similar rubber bush 21. Have been.

According to the suspension mechanism according to the present embodiment configured as described above, when the seat 1 is used, the seat 1 is guided by the elevating guide 9 and linearly displaces vertically. At this time, the torsion bar 13 slides in the U-groove of the mounting bracket 14 with respect to the seat frame 2 in the front-rear direction, thereby allowing a linear displacement of the seat 1 in the vertical direction. The dam damper 17 linearly expands and contracts in a direction parallel to the moving direction of the seat 1.
Thus, the seat 1 is provided with an appropriate cushion by the torsion bar 13 and a damping force by the gas damper 17, so that a suitable suspension function with a comfortable ride can be obtained.

According to this embodiment, since a suspension mechanism capable of linearly displacing the seat 1 can be provided, the gas damper 1 performing linear motion can be provided.
By assembling 7 in parallel with the displacement direction of the seat 1,
The mounting portion of the gas damper 17 can be prevented from being subjected to an unreasonable external force such as prying it, and the mounting portion can be protected. Therefore, the screw-type mounting structure of the commercially available gas damper 17 can be used without modification. Further, since the linear displacement is established, the space between the fixed frame 7 and the seat back 1b can be reduced. Also, since the lifting guide 9 has a rail structure,
A stable and smooth movement can be obtained, and the use of the torsion bar 13 can reduce the vertical space as compared with the compression coil spring.

In the above-described embodiment, the rail structure is used as the elevating guide 9 so as to be fitted to each other. Alternatively, a combination of a post and a cylindrical body fitted and raised and lowered may be used. . Further, the present invention is also realized by a combination of a rail and a roller rolling on the rail.

[0020]

As described in detail above, according to the present invention,
Since a suspension mechanism capable of linearly displacing the seat can be provided, the mounting portion of the gas damper that performs linear motion can be protected by avoiding the application of an unreasonable external force such as prying the mounting portion. It becomes possible and the movement becomes smooth. Further, since the linear displacement is established, the space between the fixing member and the seat back can be reduced,
It is also effective in improving the appearance.

[Brief description of the drawings]

FIG. 1 is a side view showing a suspension mechanism for a vehicle seat according to an embodiment of the present invention.

FIG. 2 is a detailed view of a portion A in FIG.

FIG. 3 is an exploded perspective view of the same.

FIG. 4 is a sectional view showing a mounting portion of the gas damper.

FIG. 5 is a side view showing a conventional vehicle seat suspension mechanism.

FIG. 6 is an explanatory diagram of a mounting structure of a gas damper.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Seat 2 ... Seat frame 4 ... Seat track 7 ... Fixed frame 9 ... Elevation guide 10 ... Fixed rail 11 ... Movable rail 13 ... Torsion bar 17 ... Gas damper

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shibatan Kawabata 25, Katoike, Yoshiwara-cho, Toyota-shi, Aichi Araco Corporation (72) Inventor Atsushi Inagaki 2-1-1, Toyota-cho, Kariya-shi, Aichi Toyota, Inc. Inside automatic loom mill

Claims (3)

[Claims] 1. A seat is attached to a fixed member fixed to a vehicle body side via an elevating guide so as to be linearly movable in a vertical direction, and an elastic body is disposed between the fixed member and a seat cushion. A suspension mechanism for a vehicle seat, wherein a gas damper is arranged between the fixing member and the seat back. 2. A suspension mechanism for a vehicle seat according to claim 1, wherein said lifting guide comprises a fixed rail and a movable rail which are slidably fitted to each other. 3. The elastic body is constituted by a torsion bar, and the torsion bar is fixed to one of the fixing member and the seat cushion and engaged with the other so as to be relatively movable. Claim 1 characterized by the following:
Or the suspension mechanism of the vehicle seat according to 2.