JPS635947Y2 - - Google Patents

Description

[Detailed description of the invention] The purpose of the invention is to enable easy height adjustment and adjustable cushioning for use mainly in the driver's seat of buses, etc. The object of the present invention is to provide a seat support mechanism in which the seat is maintained horizontally and has little movement back and forth.

The gist of the present invention is to include an upper frame located horizontally in the front-rear direction, a middle frame located below the upper frame in the front-rear direction, and a lower frame located horizontally in the front-rear direction below the middle frame. The lower end is pivoted to the middle frame by the lower pivot point, and the lower end is pivoted to the middle frame by the middle upper pivot point, and the upper end is pivoted to the middle frame by the middle upper pivot point. It has several upper rods that are pivotally connected and tilt upwardly backward or upwardly forward, and whose upper end is pivotally connected to the upper frame by an upper pivot point. A horizontal axis is fixed to the upper rod in the left-right direction, and a rotating body that can rotate around the horizontal axis is provided, and the rotating body is rotated by an adjustment mechanism provided on the upper rod. An upper spring that tends to increase the angle of inclination of the upper rod is provided between the rotating body and the middle frame or the upper frame, and a step board with an appropriate number of locking steps is erected on the lower frame, and the locking pins are installed. A rotary handle is pivotally connected to the middle frame at a central point, and a damper is provided between the upper frame and the middle frame so that the locking pin can be engaged and disengaged from the locking step by rotation of the rotary handle. It is something.

The configuration of the present invention will be explained below with reference to drawings of embodiments of the present invention.

It includes an upper frame 1 located horizontally in the front-rear direction, a middle frame 2 located below the upper frame 1 in the front-rear direction, and a lower frame 3 located horizontally in the front-rear direction below the middle frame 2.

Several lower rods 6 whose lower ends are pivotally connected to the lower frame 3 by a lower pivot point 4, inclined upwardly forward or upwardly backward, and whose upper ends are pivotally connected to the middle frame 2 by a lower middle pivot point 5 are used. Be prepared. The figure shows four lower rods 6 tilted upward and forward. In this case, the four lower rods 6 are of equal length and parallel, and are provided one each on the front, rear, left and right sides.

The lower end is pivotally connected to the middle frame 2 by the middle upper pivot point 7,
It is provided with several upper rods 9 which are inclined upwardly rearward or upwardly forward, and whose upper ends are pivotally connected to the upper frame 1 by means of upper pivot points 8. The figure shows four upper rods 9 tilted upward and backward. In this case, the four upper rods 9 are of equal length and parallel, and are provided one each on the front, rear, left and right sides.

A lower spring 10 is provided between the lower frame 3 and the lower rod 6 and has a tendency to increase the inclination of the lower rod 6. The structure of the lower spring 10 may be any suitable structure, and in the figure, a torsion spring is used.

A horizontal shaft 11 is fixed to the upper rod 9 in the left-right direction. The figure shows a case where it is fixed on an extension of the upper rod 9. A rotating body 12 that can rotate around a horizontal axis 11 is provided.

The rotating body 12 can be rotated by an adjustment mechanism 21 provided on the upper rod 9.

The structure for rotating the rotating body 12 is appropriate; in the figure, an adjustment knob 21 is provided on a branch piece 20 fixed on an extension of the upper rod 9, and a threaded portion 22 at the tip thereof is rotated into the rotating body 12. It is screwed into a pivot nut 23 which is provided so that it can be rotated.

An upper spring 13 is provided between the rotating body 12 and the middle frame 2 or the upper frame 1, which tends to increase the angle of inclination with respect to the horizontal of the upper rod 9. The figure shows a case where the tension spring 13 is provided between the rotating body 12 and the middle frame 2.

A step plate 15 having an appropriate number of engagement steps 14 is erected on the lower frame 3. In the figure, the number of engaging stages 14 is five.

The rotating handle 17 having the engaging pin 16 is attached to the middle frame 2.
It is pivoted to by a central landing point 18.

By rotating the rotating handle 17, the engaging pin 16 can be engaged with and disengaged from the engaging step 14. In the figure, the weight of the tip of the rotating handle 17 causes the locking pin 16 to
is shown engaged with the locking stage 14.
When the rotating handle 17 is rotated upward against gravity, the engaging pin 16 is disengaged from the engaging stage 14.

A damper 19 is provided between the upper frame 1 and the middle frame 2. Since the present invention has such a configuration, its functions and effects are as follows.

The middle frame 2 is in the state shown in the figure, that is, with the locking pin 1
6 is engaged with the engagement stage 14, it is fixed to the lower frame 3 without vertical movement. When the rotation handle 17 is operated to disengage the locking pin 16, the angle of the lower rod 6 becomes larger due to the lower spring 10, and the middle frame 2 moves upward to become higher in height. When the locking pins 16 are brought into engagement at an appropriate height, the middle frame 2 is fixed at that height.

In order to lower the middle frame 2, which has once become high, the engaging pin 16 may be disengaged, the middle frame 2 may be pressed down, and the engaging pin 16 may be brought into the engaged state.

In this way, according to the present invention, the overall height can be easily adjusted.

The present invention is used by fixing a seat on the upper frame 1.

When a load is applied to the upper frame 1 by the seat, the angle of inclination of the upper rod 9 becomes small, and the seat moves against the upper spring 13, producing a cushion effect. At this time, the damper 19 expands and contracts in parallel to produce a damping effect, thereby improving the cushioning effect. When the rotating body 12 is rotated by the adjustment mechanism 21, the length of the upper spring 13 is adjusted, so the strength of the upper spring 13 changes, and therefore the degree of cushioning action on the seat can be adjusted. I can do it. In the figure, the adjustment can be made by turning the adjustment knob 21. Since the direction of inclination of the lower rod 6 and the upper rod 9 is opposite to the horizontal direction, when the upper frame 1 moves up and down, the horizontal movement of the upper frame 1 and the horizontal movement of the middle frame 2 are different. They are reversed and end up in the top frame 1.
The horizontal movement of will be small, and the back and forth movement of the zabuta will be small.

Although the step plate 15 is shown only on the right side in the figure, it can also be provided on the left side.

In this way, according to the present invention, a simple structure of a driver's seat etc. whose height and cushioning properties can be adjusted can be obtained, which is of great practical value.

[Brief explanation of drawings]

FIG. 1 is a side view, FIG. 2 is a cutaway side view, and FIG. 3 is a front view with a portion removed. In the figure, 1 is the top frame, 2 is the middle frame, 3 is the bottom frame,
4 is the lower pivot point, 5 is the middle lower pivot point, 6 is the lower rod, 7 is the middle upper pivot point, 8 is the upper pivot point, 9 is the upper rod, 10 is the lower spring, 11 is the horizontal axis, 12 is a rotating body, 13 is an upper spring, 14 is a locking step, 15 is a step plate, 16 is a locking pin, 1
7 is a rotating handle, and 18 is a central landing point.

Claims (1)

[Scope of utility model registration request] It is equipped with an upper frame 1 located horizontally in the front-rear direction, a middle frame 2 located below the upper frame 1 in the front-rear direction, and a lower frame 3 located horizontally in the front-rear direction below the middle frame 2, and the lower end is the lower frame. 3 by a lower pivot point 4 and tilted upward and forward or tilted upward and backward so that the upper end is connected to the middle frame 2
It is equipped with several lower rods 6 which are pivotally connected to the middle frame 2 by the middle lower pivot point 5, and when the lower end is pivotally connected to the middle frame 2 by the middle upper pivot point 7 and the lower rod 6 is tilted upward and forward. is tilted upward and rearward, and when the lower rod 6 is tilted upward and rearward, it is tilted upward and forward so that the upper end thereof is tilted upward and backward.
It is provided with several upper rods 9 pivotally connected by an upper pivot point 6, and is provided between the lower frame 3 and the lower rod 6 to tend to increase the angle of inclination of the lower rod 6 with the horizontal. A rotating body 12 having a lower spring 10 having a horizontal axis 11 fixed to the upper rod 9 in the left-right direction and capable of rotating around the horizontal axis 11.
is provided so that the rotating body 12 can be rotated by an adjustment mechanism 21 provided on the upper rod 9, and an inclination angle formed between the rotating body 12 and the middle frame 2 or the upper frame 1 with respect to the horizontal of the upper rod 9 is provided. An upper spring 13 having a tendency to increase the height is provided, and a step plate 15 having an appropriate number of engagement steps 14 on the lower frame 3
A rotary handle 17 is provided with a locking pin 16.
is pivotally connected to the middle frame 2 at a center attachment point 18, and the locking pin 16 can be engaged with and disengaged from the locking step 14 by rotation of the rotating handle 17.