JPH0619410Y2 - Suspension seat - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a suspension seat that absorbs vibrations and shocks.

[Prior Art] Reclining and sliding mechanisms are generally adopted in vehicle seats, so that the seat can be adjusted to a desired state to obtain an appropriate sitting posture according to the physique and taste of an occupant. There is.

Furthermore, recently, a damper mechanism that absorbs and absorbs vibrations transmitted from the vehicle body has been adopted, and a suspension seat that enables a more comfortable sitting state has been put into practical use. Although Japanese Utility Model Laid-Open No. 61-203842 discloses disposing shock absorbers which act vertically in four corners between a seat and a vehicle body, the shock absorber structure and the installation structure are different. Not mentioned. Usually, it is embodied as shown in FIG.

FIG. 5 shows an example of a conventional suspension seat.

The suspension seat 1 in the figure is a seat cushion 2
A lower frame 5 fixed to the vehicle body side floor 4, a holding mechanism 6 for elastically supporting the upper frame 6 with respect to the lower frame 5, and a damper mechanism 7 such as a shock absorber. ing.

Further, the holding mechanism 6 includes a set of link arms pivotally supported in a substantially X shape and a torsion bar hung between the link arms, so that the upper frame 3 can be moved up and down with respect to the lower frame 5. Elastically supported. Then, shocks, vibrations, etc. transmitted from the floor 4 are alleviated and absorbed by the holding mechanism 6 and the damper mechanism 7.

[Problems to be Solved by the Invention] As described above, in the conventional suspension seat 1, the upper frame 3 is elastically supported so as to be movable up and down with respect to the lower frame 5 by the holding mechanism 6 including a link arm and a tow bar. It was

Therefore, the conventional holding mechanism 6 indispensably needs a link arm that axially supports two links in an X shape, and naturally becomes large and very heavy. For this reason, when the suspension seat 1 is applied, durability and a sufficient vertical dimension are required as an arrangement space, and the suspension seat 1 cannot be actually applied to a normal vehicle and is limited to a large vehicle such as a truck.

The present invention has been made in view of such a background, and an object of the present invention is to provide a suspension seat that can achieve a suspension mechanism with a simple structure and can be reduced in size and weight.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a lower frame fixed to a vehicle body floor side, an upper frame for mounting a seat cushion, and an elastic support for the upper frame with respect to the lower frame. In the suspension seat having a holding mechanism for holding the holding mechanism, the holding mechanism has four spiral springs interposed between the upper frame and the lower frame and in each of the front, rear, left and right corners. A spiral spring connected to a shaft, and a rod for changing the spring pressure of the spiral spring by rotating a part of the shaft in cooperation with the shaft, and an operating dial provided at one end of the rod. It is characterized by having a spring pressure adjusting means consisting of.

[Operation] According to the present invention having the above-described configuration, the vibrations and shocks transmitted from the vehicle body are alleviated by the four spiral springs interposed between the upper frame and the lower frame and at the front, rear, left and right corners.

Further, the spring pressure of the spiral spring can be arbitrarily changed by the operation dial of the spring pressure adjusting means.

The spiral spring acts as an alternative to the conventional X-shaped link arm and torsion bar spring.

[Embodiment] An embodiment of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a side view showing a suspension seat to which the present invention is applied, FIG. 2 is a perspective view showing an essential part of the seat, and FIGS. 3 and 4 are spring pressure adjusting means of a spiral spring.

The suspension seat 10 shown in FIG. 1 serves as an upper frame 12 to which a seat cushion 11 is fixed, a lower frame 14 to be fixed to a vehicle body side floor 13, and a holding mechanism that elastically supports the upper frame 12 with respect to the lower frame 14. The spiral spring 16 and the shock absorber 15 which is a well-known damper mechanism arranged between the frames 12 and 14 are provided.

The upper frame 12 and the lower frame 14 are substantially frame-shaped as in the conventional case, and the lower surface of the seat cushion 11 is fixed to the upper frame 12.

The spiral spring 16 includes the upper frame 12 and the lower frame 1.
The elastic supporting force can be adjusted by the spring pressure adjusting means 21 while being interposed in each of the four corners.

The spiral spring 16 includes a bracket 17 welded and fixed to a side portion of the lower frame 14 as shown in FIG.
Shaft 19 spanned between 7 and upper frame 1
2 and the pin 18 protruding from the lower protrusion 12a
8 is attached by a link 20 interposed between the bracket 17 and the bracket 17.

The end of the shaft 19 has a hole 20a on the lower side of the link 20.
And the spiral spring 16 through the hole 17a of the bracket 17.
Is coupled to the inner end 16a of the. In this state, while twisting the spiral spring 16, the hook formed on the outer end portion 16b of the spiral spring 16 is locked with the pin 18 projecting through the hole 20b on the upper side of the link 20 to form a spiral. Spring 1
6 is attached between both frames 12 and 14. In this case, the spiral spring 16 functions as a spring force preset according to the degree of twist, that is, a standard elastic supporting force.

In addition, the spiral spring 16 is similarly attached to the other end of the shaft 19.
Is attached. Needless to say, the remaining two spiral springs 16 are also attached in the same manner.

Further, the spring pressure adjusting means 21 includes a shaft 19 that connects the left and right spiral springs 16 to each other, and a rod 24 that is connected to the shaft 19 via an engaging piece 22 and a clear box 23.
And a dial 26 provided at the end of the rod 24.

An engagement piece 22 provided with an engagement groove 22a is fixed to a substantially middle portion of the shaft 19. The engaging piece 22 is fixed so that the engaging groove 22a faces downward.
It is fitted with a pin 25 protruding from the gear box 23 on the 2a.

The gearbox 23 is incorporated in the rod 24. The lot 24 is rotatably supported by, for example, brackets on the front and rear frame portions of the lower frame 14. A threaded portion 26 is formed on a part of the rod 24 in the axial direction, and the gear box 23 is screwed onto the threaded portion 26. A dial 26 is attached to the tip of the rod 24, and the gearbox 23 is moved back and forth along the screw portion 26 by rotating the dial 26.

Therefore, for example, by rotating the dial 26,
If the gear box 23 is movable in the direction of the arrow in FIG. 4,
As the gear box 23 moves, the engagement piece 22 is swung from the solid line position to the alternate long and short dash line position. The swing of the engagement piece 22 causes the shaft 19 to rotate, which narrows the spiral spring 16 and strengthens the spring pressure. On the contrary, when the spring pressure is to be loosened, the spring pressure of the spiral spring 16 can be loosened by rotating the dial 26 in the reverse direction and rotating the shaft 19 in the reverse direction.

In this way, the suspension seat 10 having the above-described configuration is
Since the holding mechanism is obtained by the spring pressure of the spiral spring 16, the shock, vibration, etc. transmitted from the vehicle body are effectively alleviated by the spiral spring 16 and the shock absorber 15
It is efficiently absorbed by the Dunbar mechanism. As a result, a good suspension function can be obtained. The shock absorber 15 has a well-known damper mechanism, but is smaller than the conventional one.

Further, since the suspension seat 10 has a structure in which the spiral spring 16 is installed at each corner between the upper frame 12 and the lower frame 14 instead of the conventional holding mechanism, the suspension seat 10 has a compact structure, and is inexpensive and lightweight. It will be

Furthermore, since the spring pressure of the spiral spring 16 can be adjusted,
Only by operating the dial 26, the spring pressure of the spiral spring 16 can be adjusted, so that an appropriate suspension mechanism matching the weight of the occupant can be obtained.

[Advantages of the Invention] As is clear from the above-described embodiments, the suspension seat according to the present invention is located between the upper frame and the lower frame in the front and rear direction with respect to the conventional holding mechanism including the X-shaped link arm and the torsion bar. Since the elastic supporting force is obtained by the four spiral springs interposed in each of the left and right corners, the size and weight can be reduced. Further, the spring pressure of the spiral spring can be adjusted to a desired elastic supporting force simply by operating the dial of the spring pressure adjusting means.

As a result, the suspension seat can be applied to a standard vehicle or a small vehicle, which has not been conventionally adopted because a space cannot be secured in the body design, and the riding comfort of the standard vehicle can be greatly increased.

[Brief description of drawings]

FIG. 1 is a side view of a suspension seat showing an embodiment of the present invention, and FIG. 2 is an exploded perspective view showing a main portion of the seat,
FIG. 3 is a schematic perspective view showing the spring pressure adjusting means, FIG. 4 is a side view for explaining the operation of the adjusting means, and FIG. 5 is a schematic view showing the configuration of a conventional suspension seat. 10-Suspension seat 11-Seat cushion 12-Upper frame 13-Floor 14-Lower frame 16-Swirl spring 19-Shaft 20-Rod 21-Spring pressure adjusting means 26-Operating dial .

Claims (1)

[Scope of utility model registration request] 1. A lower frame fixed to a vehicle body floor side, and an upper frame for mounting a seat cushion,
In a suspension seat including a holding mechanism that elastically supports the upper frame with respect to the lower frame, the holding mechanism includes four spiral springs that are interposed between the upper frame and the lower frame and that are provided in front, rear, left, and right corners. And a rod for changing the spring pressure of the spiral spring by connecting the opposing left and right spiral springs by a shaft, and rotating the shaft by linking a part of the shaft with the shaft. A suspension seat having spring pressure adjusting means including an operation dial provided at one end.