JPH10211028A - Operation lever for gas spring - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable to smoothly perform pressing operation of a protruding plug, by movably equipping a spherical pressing body supported by a support in a device to adjust the extension amount of a gas spring by pressing the protruding plug for gas pressure releasing. SOLUTION: A top plate 10 is pushed up by pulling up the rear end part of an operation lever 11 to press a protruding plug via a spherical pressed body 15 to release the gas pressure inside. At the rotation operation of the operation lever 11, since a flexible piece at an attaching part of the operation lever 11 is twisted to occur elastic deformation and quickly returns to the original position by its elastic restoring force, a return spring, etc., for restoration becomes unnecessary. Since the protruding plug 17 is pressed by the operation lever 11 via the spherical pressed body 15, the sliding friction resistance between the pressed body 15, the operation lever 11 and the protruding plug 17 is reduced to smoothly press and move the protruding plug and to reduce abrasion of mutual contact faces to the least.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operating device for pushing a stopper for releasing gas pressure in a gas spring used for a lifting table, for example.

[0002]

2. Description of the Related Art The applicant of the present invention accommodates a gas spring in a pillar standing upright on a supporting leg, and uses a gas pressure releasing plug provided at the upper end of a cylinder of the gas spring to rotate a lever. A lifting table has been devised in which the height of a top plate attached to the upper end of a cylinder can be adjusted by being pushed by an operation.

[0003]

As described above, when the stopper for gas pressure release is pushed only by the turning operation of the lever, the pushing force of the lever causes the pushing force of the stopper to be pushed in the axial direction. Acts to pry the plug sideways without acting effectively, resulting in increased frictional resistance with the lever, lacking lightness when operating the lever, and causing the contact surfaces of each other to wear out early Might be. The present invention has been made in view of the above-mentioned problems, and has a spherical pressing body interposed between a lever and a stopper so that the lever can be smoothly pushed by the stopper. An object of the present invention is to provide a gas spring operating device.

[0004]

According to the present invention, the above-mentioned problem is solved as follows. (1) In a gas spring operating device in which a gas pressure releasing push plug in a gas spring is pushed by a rotation operation of an operating lever to adjust the amount of expansion and contraction of the gas spring, the operating lever and the projecting plug are adjusted. Between the stopper
A spherical pressing member supported by a supporting member integral with the gas spring is provided so as to be movable in a protruding and retracting direction of the stopper.

(2) A pressing body is integrally provided at a central portion of a cover attached so as to cover the stopper so that a part thereof is continuous with the cover.

(3) In the above item (2), a thin portion is formed in a continuous portion between the cover and the pressing body.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a vertically movable table to which the present invention is applied.
(Hereinafter, the left side in the figure is referred to as the front side).

At the base of the supporting leg (1), a pillar (4) composed of an inner cylinder (2) and an outer cylinder (3) fitted to the outer cylinder with a required gap is provided. The lower end of (2) is press-fitted into the base of the support leg (1), so that it is erected in a slightly inclined position.

A known gas spring is provided in the inner cylinder (2).
(5) is accommodated, and the upper end of the cylinder (5a) is an outer cylinder.
It is fitted to the center of the support cylinder (6) which is press-fitted and fixed to the upper end of (3).

The lower end of the piston rod (5b) projecting downward in the gas spring (5) is screwed to the center of a closing plate (7) fixed to the lower end in the inner cylinder (2).

A support plate is provided at the upper end of the pillar (4), that is, at each end of the pivot shaft (8) extending from the left and right sides of the support cylinder (6).
(9) is pivotally mounted in a vertically rotatable manner, and a top plate (10) is fixed on both support plates (9). The top plate (10)
The horizontal use position and the pillar
(4) It is possible to rotate between a rear surface and a folding position substantially parallel to the rear surface.

Immediately below the top plate (10), as shown in FIG. 2, the cross-sectional shape with the operating portion at the front end and the operating portion at the rear end is substantially U-shaped, and the bent top portion is shown in FIG. A pair of thin flexible pieces (11a) extending perpendicularly to the left and right sides from the vicinity
An operating lever (11) made of synthetic resin having
A bolt (12) inserted into an annular mounting portion (11b) formed at the tip of (a) is fixed by screwing it into the lower surface of the top plate (10). Thus, the operation lever (11) can be turned up and down around the top. (13) is a reinforcing piece provided downwardly at a bent portion at the center of the lower surface of the operation lever (11).

At the center of a synthetic resin cover (14) fitted on the upper surface of the support cylinder (6), a spherical pressing body (15) is provided with a cover (14) except for a part on the front side. ) By being cut out in a more circular shape, they are continuously connected so as to be rotatable up and down around the front end. In addition, a thin portion (1
6) is formed to make it easy to bend up and down.

The lower end surface of the pressing body (15) is a gas spring.
It is in contact with the upper end of the gas pressure releasing plug (17) projecting from the upper end of the cylinder (5a) in (5). The upper end surface of the pressing body (15) is in contact with the lower surface of the horizontal portion at the front end of the operation lever (11).

In the above embodiment, to raise the top plate (10), the rear end of the operation lever (11) is pulled up with one hand,
The stopper (17) is pushed through the pressing body (15). Then, the internal gas pressure is released, the piston rod (5b) is projected, and the top plate (10) is pushed up. When the top plate (10) reaches a desired height, if the user releases the operating lever (11), it is locked and held at that position.

When the operating lever (11) is rotated, the two flexible pieces (11a) are twisted and elastically deformed, and when they are released, they quickly return to their original positions by their elastic restoring force. No return spring or the like for return is required.

To lower the top plate (10), the operation lever (1
With the 1) raised, the top plate (10) is pressed down, and when the desired height is reached, the operation lever (11) may be released.

In the above embodiment, since the pushing of the plug (17) by the operating lever (11) is performed via the spherical pressing body (15), the pressing body (15) and the operating lever (15) are moved. 11) and spigot (1
The sliding frictional resistance with 7) can be reduced, the push plug (17) can be pushed smoothly, and the abrasion of the contact surfaces of each other can be minimized.

FIG. 3 shows a modification of the operating lever (11). Instead of omitting the pair of flexible pieces (11a) of the above-mentioned embodiment, a thin wall is provided on the top surface of the bent portion. A rectangular plate-shaped mounting piece (19) in which flexible pieces (18) are connected upward and are horizontal at the upper end thereof
The mounting piece (19) is bolted to the lower surface of the top plate (10).
(20) Stopped.

In the operation lever (11) of this embodiment,
When the operator releases the hand after rotating the operation lever (11), the elastic piece is quickly returned to the original position by the restoring force of the elastically deformed flexible piece (18), so there is no need to provide a return spring or the like. .

The present invention is not limited to the above embodiment. For example, the flexible pieces (11a) and (18) may be formed separately from spring steel or the like and connected to the synthetic resin operation lever (11) body.

When the main body of the operation lever (11) is formed of a rigid metal material or the like, the reinforcing piece (13) may be omitted.

In the embodiment, the pressing body (15) is formed integrally with the cover (14). However, only the pressing body (15) is attached to the mounting piece extending from the pressing body (15). By fixing to the upper outer peripheral edge, it is provided so as to be rotatable up and down, and the cover (14) may be omitted.

[0024]

According to the present invention, the following effects can be obtained. (A) Since the pushing of the spigot is performed via the spherical pressing body, the pressing force by the operation lever effectively acts on the spigot, and the spigot can be pushed smoothly. . Also,
Since the frictional resistance between the pressing body, the operating lever, and the plug is reduced, the abrasion of the contact surfaces of each other can be minimized.

(B) According to the second aspect, the upper end of the gas cylinder and the stopper are covered with a cover in a good shape to prevent the intrusion of dust and the like, and the cover and the pressing body are integrated with a synthetic resin material or the like. Can be molded.

(C) According to the third aspect, the pressing body can be easily turned up and down around the thin portion.

[Brief description of the drawings]

FIG. 1 is a vertical cross-sectional side view of a vertically movable table to which the present invention is applied.

FIG. 2 is an enlarged cross-sectional plan view of a main part along line II-II in FIG.

FIG. 3 is an enlarged vertical sectional view of a main part of a lifting table to which another embodiment of the present invention is applied.

[Explanation of symbols]

 (1) Support leg (1a) Branch leg (2) Inner cylinder (3) Outer cylinder (4) Pillar (5) Gas spring (5a) Cylinder (5b) Piston rod (6) Support cylinder (7) Closure plate ( 8) pivot shaft (9) support plate (10) top plate (11) operation lever (11a) flexible piece (11b) mounting part (12) bolt (13) reinforcing piece (14) cover (15) pressing body ( 16) Thin section (17) Plug (18) Flexible piece (19) Mounting piece (20) Bolt

Claims (3)

[Claims] 2. The gas spring operating device according to claim 1, wherein the gas spring releasing plug of the gas spring is pushed by a turning operation of an operating lever to adjust the amount of expansion and contraction of the gas spring. An operating device for a gas spring, characterized in that a spherical pressing body supported by a support member integral with the gas spring is provided between the plug and the stopper so as to be movable in a direction in which the stopper plug protrudes and retracts. 2. The operating device for a gas spring according to claim 1, wherein the pressing body is integrally provided at a central portion of the cover attached so as to cover the stopper so that a part thereof is continuous with the cover. 3. The gas spring operating device according to claim 2, wherein a thin portion is formed in a continuous portion between the cover and the pressing body.