JPS638498Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle seat equipped with a shock absorber that is adjustable in height and is mainly used in industrial vehicles such as forklift trucks and shovel loaders.

Driving industrial vehicles is a very tough job, given the working environment. Therefore, it is preferable that the driver's seat be height adjustable so that the driver can find a driving position that suits his/her physique, and that the seat have excellent shock-absorbing properties to reduce vibrations. However, conventional seats for this type of vehicle have insufficient shock-absorbing properties when equipped with a height-adjustment mechanism.
Many of the seats with excellent shock-absorbing properties are not adjustable in height due to their mechanism, and there is a strong demand for the development of a vehicle seat which is freely adjustable in height and has excellent shock-absorbing properties.

The present invention was completed for the purpose of a vehicle seat that met the above-mentioned demands, and as shown in the illustrated embodiment, it is a rotatable seat with both ends pivoted on front and rear bearing members 1a and 1b. A short tube 4a having a threaded portion 3a formed on the outer circumferential surface of the shaft 2 and a short tube 4b having a threaded portion 3b formed on the outer circumferential surface of the threaded portion 3a having a reverse thread are attached to the shaft 2.
The short pipes 4a, 4b are fitted with nuts 5a, 5b, and the short pipes 4a, 4b are fitted with nuts 5a, 5b on the inside and outside of the short pipes 4a, 4b. An elastic member 6c that elastically connects the tubes 4a and 4b, and short tubes 4a and 4b formed by the elastic member 6c.
The seat main body 7 is connected and supported by the nuts 5a, 5b with a link 8. That is. In addition, 9 in the figure is provided on the outer circumferential surface of the shaft 2 as a means for allowing the short tubes 4a and 4b fitted to the shaft 2 to slide relative to the shaft 2 but not to rotate. Spline teeth engaged with the spline holes of the short pipes 4a and 4b; 10 is a support rail provided below the shaft 2 as necessary to support the load of the seat main body 7, etc.;
Reference numerals 11a and 11b denote wheels for smooth operation that are provided below the nuts 5a and 5b as necessary and roll along the support rail 10, and 12 is a rotating handle provided at the front end of the shaft 2.

With this structure, the front and rear bearing members 1a and 1b are attached to the floor of the driver's seat or a longitudinal position adjustment device provided on the floor, and the driver is seated on the main seat 7. The shaft 2 has both ends supported by bearing members 1a and 1b.
are fitted with short tubes 4a and 4b so that the shaft 2 can slide in the axial direction but not rotate. Alternatively, the resilient members 6c such as compression springs are connected, and the resilient members 6c are provided on both outer sides.
Resilient members 6a, 6b that repel the short tubes 4a, 4b in a direction opposite to the direction of movement of the short tubes 4a, 4b by c.
are provided and held in a predetermined position under the balance of these resilient members 6a, 6b, and 6c, and the seat main body 7
A nut 5a is screwed onto a threaded portion 3a on the outer circumferential surface of one short tube 4a, and a nut 5a is screwed onto a threaded portion 3b formed on the outer circumferential surface of the other short tube 4b, the thread being opposite to the threaded portion 3a. Since it is connected to the nut 4b via the links 8, 8, when a load is applied to the seat main body 7, the short pipe 4 is connected via the links 8, 8 and the nuts 5a, 5b.
a and 4b slide in the axial direction under the elasticity of the elastic members 6a, 6b, and 6c to exert a buffering effect, and vibrations are absorbed and alleviated by the elastic members 6a, 6b, and 6c. However, depending on the physique of the driver, the seat is mainly 7
If you want to adjust the height of the bearing member 1 higher, by rotating the shaft 2 in one direction, the short pipes 4a and 4b will also rotate at the same time.
a, 1b side, the positions of the nuts 5a, 5b with respect to the short pipes 4a, 4b are located near the inner ends of the short pipes 4a, 4b, and further, the rotation of the shaft 2 is continued to release each bullet. When the reaction force of the member begins to overcome the weight from the seat main body 7 via the link 8, the short pipes 4a, 4b move inward, that is, in a direction where the distance between them becomes narrower, and the seat main body 7 is moved towards the link 8. , 8 to the position shown by the dashed line in the figure. On the other hand, when it is desired to lower the height of the seat main body 7, the position of the seat main body 7 is lowered in the reverse order by simply rotating the shaft 2 in the opposite direction. Therefore,
The height of the seat main body 7 can be adjusted accurately and easily by a simple operation of rotating the shaft 2 forward and backward, and even when the height is adjusted, the elastic members 6a, 6b, 6
This does not impede the buffering function of c. Note that it is preferable that the elastic members 6a, 6b, and 6c be made replaceable depending on the user's physique, or that the elastic force can be changed by adjusting the mounting position.

As is clear from the description of the embodiments described above, the present invention is capable of accurately and easily adjusting the height of the seat to ensure a driving position suitable for the physique of the driver, and has an excellent cushioning function. It has various advantages such as simple structure, easy mass production, and fewer failures.
It has great practical value as it solves the problems of conventional vehicle seats.

[Brief explanation of the drawing]

The drawing is a partially cutaway side view showing an embodiment of the present invention. 1a, 1b: bearing member, 2: shaft, 3a, 3b:
Threaded portion, 4a, 4b: short pipe, 5a, 5b: nut, 6a, 6b, 6c: elastic member, 7: seat main body, 8: link.

Claims (1)

[Scope of utility model registration request] A short pipe 4a having a threaded portion 3a formed on the outer circumferential surface is attached to a shaft 2 whose front and rear ends are pivotally supported. The short pipes 4a and 4b are fitted with nuts 5a and 5 so that they can slide but not rotate.
A resilient member 6c which elastically connects the short tubes 4a, 4b is installed on the inside and both outside of the short tubes 4a, 4b, and a short tube 4a by the resilient member 6c.
A vehicle is provided in which resilient members 6a and 6b are provided for resiliently repelling the short pipes 4a and 4b in a direction opposite to the direction of movement of the short pipes 4b, and a seat main body 7 is connected and supported to the nuts 5a and 5b via a link 8. seat.