JP2001334850A - Position holding device for seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a position holding device for a seat capable of surely keeping a seat position in a horizontal state. SOLUTION: This position holding device for a seat is constituted by a rotation supporting point 24 of a seat 1 which is formed at the upper part and the left and right center position of the barycenter of the seat and an attenuating device 3 for attenuating the rotational operation which is installed at the lower part of the seat 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle having a seat for boarding, and more particularly, to a seat holding structure in which the seat is rotatably mounted so as to maintain a horizontal state corresponding to the inclination of the vehicle body. Related to the device.

[0002]

2. Description of the Related Art Japanese Unexamined Patent Publication (Kokai) No. 7-172299 describes a technique relating to a vehicle having a seat that is rotatable with respect to a vehicle body. This technology relates to a vehicle that travels on a rail on a steep slope and drives a seat tilting mechanism in response to a command from a control unit that stores the slope state of the rail to maintain the seat attitude horizontally.

[0003]

However, in the above-mentioned prior art, since the gradient state of the traveling route of the vehicle must be stored in advance, it is used only for a vehicle traveling on a predetermined route such as a rail. And the range of use is extremely limited. Therefore, in the present invention,
An object of the present invention is to provide a seat posture holding device that can be used for any vehicle without defining a traveling route and that can surely hold a seat posture horizontally.

[0004]

SUMMARY OF THE INVENTION In a vehicle having a seat 1 for boarding, when the seat 1 is rotatably mounted so as to maintain a horizontal state in accordance with the inclination of the vehicle body 2, the seat 1 is mounted on the vehicle. A rotation fulcrum 24 is formed above the center of gravity of the seat and at the center in the left and right direction, and a damping device 3 for alleviating the above-mentioned rotation is provided below the seat 1 to constitute a seat attitude holding device.

[0005]

In the seat posture holding device of the present invention, the pivot point 24 of the seat 1 is formed above the center of gravity of the seat and at the center in the left and right direction. When the vehicle body 2 is tilted, the seat 1 can be appropriately rotated about the rotation fulcrum 24 to keep the posture constantly horizontal. At this time, since the seat 1 rotates by its own weight, it is necessary to securely maintain a horizontal state in response to all road surface changes and inclinations without having an expensive and complicated power mechanism such as a tilting mechanism. Can be.
Further, the rotation operation of the seat 1 is moderately attenuated by the damping device 3 below the seat 1, so that the seat 1 can be seated in a comfortable and stable posture.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment in which the posture holding device of the present invention is applied to a seat of a small transport vehicle will be described with reference to the drawings. The small transport vehicle having the posture holding device according to the present invention includes a body frame 6 supporting two front wheels 4, 4 and two rear wheels 5, 5, a cover frame 7 covering the body frame 6 above, and a rear portion of the body 2 , A loading seat 8 attached to the vehicle, a boarding seat 1 in the center of the vehicle body 2 and a steering device 9. The seat 1 includes a seating section 10 on which a passenger sits down and a backrest section 11 for supporting the back of the passenger.

Reference numeral 12 denotes a support column projecting vertically in front of the loading platform 8.
As a result, the front end of the fulcrum pin 13 is fitted into the backrest 11 of the boarding seat 25, and the seat 1 is mounted to be rotatable left and right about the fulcrum pin 13. At this time, the fulcrum pin 13 is fitted in the left and right center and the upper half of the backrest portion 11, that is, by setting the rotation fulcrum 24 of the seat 1 higher than the center of gravity of the seat 1, the seat 1 , And the posture is always kept horizontal. An air damper 3, which is an example of a damping device, is provided below the seat 10. Air damper 3
Are mounted on the main bracket 15 formed on the cover frame 7 so as to be rotatable up and down, and
6 is formed on the lower surface of the seating portion 10 at the tip of the sub bracket 6.
7 so as to be freely rotatable.

When the vehicle travels on a small transport vehicle having the above configuration, when traveling on level ground, the seat 1 and the road surface X travel parallel to each other as shown in FIG. When traveling on a slope, the vehicle body 2 leans along the slope of the road surface X as shown in FIG.
The seat 1 is horizontally rotated about the fulcrum pin 13 and held in a horizontal state. At this time, the air damper 3 expands and contracts in accordance with the left-right rotation, and the rotation operation of the seat 1 is gradually attenuated.
The shock at the time of the rotation can be reduced, and the occupant can sit in a comfortable and stable posture without being forced to take an unreasonable posture.

FIG. 4 is a front view of a seat posture holding device according to another embodiment of the present invention, which is constructed as follows. In the seat posture holding device according to the other embodiment, a rotation shaft 19 is passed through the intermediate portion of a support rod 18 vertically extending downward from the center of the lower surface of the seating portion 10 in the front-rear direction. The rotation shaft 1 is formed by a support bracket 20 formed in
9, the seat 1 is configured to be rotatable left and right, and a weight 21 that is at least heavier than the weight of the seat 1 is attached to the lower end of the support rod 18. So that it is always kept vertical by its own weight, that is,
The seat 1 at the upper end of the support rod 18 is always kept horizontal. At the left and right sides of the support rod 18, mounting rods 22, 22 project from the lower body frame 6, and springs 23, 23 which are an example of a damping device are provided between the mounting rods 22, 22 and the support rod 18. Is mounted so as to moderately attenuate the rotational movement of the seat 1. It should be noted that, in the claims section, a number is described for convenience in comparison with the drawing,
With this entry, the present invention is not limited to the structure of the attached drawings.

[0010]

[Brief description of the drawings]

FIG. 1 is an overall side view showing an embodiment of the present invention.

FIG. 2 is an AA cross-sectional view partially omitted.

FIG. 3 (a) is a partially omitted illustration A- showing a traveling state on an inclined road.
A sectional drawing. (B) AA cross-sectional view showing a partly omitted running state on a slope.

FIG. 4A is a front view of a main part of another embodiment. (B) A front view of a main part of another embodiment showing a running state on a slope. (C) A front view of a main part of another embodiment showing a running state on a slope.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Seat 2 Body 3 Damping device 24 Rotating fulcrum

Claims (1)

[Claims] 1. A vehicle having a boarding seat (1), wherein the seat (1) is rotatably mounted to maintain a horizontal state corresponding to the inclination of a vehicle body (2). (1)
Is formed above the center of gravity of the seat and at the center in the left and right direction, and further provided below the seat (1) with a damping device (3) for alleviating the above-mentioned turning operation. apparatus.