JPH07314353A - Height-adjustable work desk - Google Patents

Abstract

PURPOSE: To speedily and simply adjust a height of a work desk by a simple configuration. CONSTITUTION: A gas spring mechanism 8 between a parallel link mechanism 3 and an upper part support member 2 of a work desk is provided with a valve mechanism. When the valve mechanism is opened, the gas spring mechanism 8 applies its all force to the parallel link mechanism 3, and when the valve mechanism is closed, the gas spring mechanism 8 is locked in a stand-by condition. Consequently, it is possible to let a free size of auxiliary lifting force act on the parallel link mechanism by valve operation in the gas spring mechanism to adjust a height of the work desk freely.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work desk whose height can be adjusted, and more specifically, it comprises an upper support member, a lower support member, and a parallel link mechanism, which is rotatably connected to both members, as a main element. The present invention relates to the improvement of the height adjusting function of the working desk.

[0002]

2. Description of the Related Art There is a remarkable difference between sitting and standing when using a work desk. This is because the user is more conscious in the standing state. In a comfortable sitting position, you will be conscious at a lower level. Therefore, when it is possible to change between the standing state and the sitting state, the maximum effect is obtained.

When standing up from a stool to an upright position, efforts are made to overcome the gravity that is the basis of consciousness. As a result of this endeavor, more and more transient effects are exerted on the cerebral long segments, which causes a temporary rise in blood pressure. Effects from the cerebral cortex are also somewhat suppressed, which serves to lock thoughts and / or resolve stationary patterns.

A requirement for such an effect on the brain is that the change between the sitting state and the standing state must be made quickly, and the user himself must go up and down when he sits or stands up. Therefore, the human force exerted on the work desk to adjust the height is very small.

It has been conventionally known to utilize an auxiliary lifting mechanism such as a gas spring mechanism in a work desk whose height can be adjusted. That is, there is a means for continuously adjusting the auxiliary lifting force by changing the working angle of the force between the gas spring mechanism and the lifting lever, and the vertical component of the force is changed.

According to such a system, the total weight and load of the work desk are adjusted only slightly, and it can be said that the system is very excellent. According to this system, the height of the work desk can be adjusted with a small adjustment force.

[0007]

However, the system has a very complicated structure and its adjustable range is very limited.

An object of the present invention is to adjust the height of a work desk quickly and easily, and to reliably change the auxiliary lifting force.

Another object of the present invention is to provide an auxiliary lifting system capable of achieving such height adjustment of a work desk with a small number of movable members.

[0010]

Therefore, in the present invention, the gas spring mechanism between the parallel link mechanism of the work desk and the upper support member is provided with a valve mechanism, and when the valve mechanism is in the open state, the gas spring mechanism is provided. The gist is that the mechanism exerts its full force on the parallel link mechanism and the gas spring mechanism is locked in the standby state when the valve mechanism is in the closed state.

[0011]

[Operation] By operating the valve in the gas spring mechanism, an auxiliary lifting force of any size can be applied to the parallel link mechanism.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is intended to obtain auxiliary lifting forces of various magnitudes by a very simple structure and method when using a parallel link mechanism and a gas spring mechanism in combination.

In each of the following drawings, only the upper support member, the parallel link mechanism, and half of the lower support member are shown. Therefore, the same element as that shown in the figure is provided on the opposite side of the work desk in the left-right reversed arrangement.
Both sides of these work desks are connected by an appropriate cross member (cross bar) not shown.

FIG. 1 shows an embodiment of a work desk according to the present invention, in which a desk member 1 is supported by an upper support member 2, which is composed of links 3a and 3b. Lower support member B through the closed link mechanism 3
Are linked to. The lower support member B is vertically mounted on one end of the bottom member A. Each of these elements is assembled in an S shape or a Z shape as a whole.

The parallel link mechanism 3 consisting of a pair of links 3a and 3b is connected to the upper support member 2 at shaft fulcrums 4 and 5, and is connected to the lower support member B at shaft fulcrums 6 and 7.

In the above structure, the first gas spring mechanism 8 has its upper end attached to the attachment point 10 on the upper support member 2 and its lower end attached to two links 3a constituting one of the parallel link mechanisms 3. It is attached to one of the points 9a, 9b. The gas spring mechanism 8 is provided with a driving body (handle) 15 for opening and closing the valve.

In addition to the gas spring mechanism 8 described above, a second gas spring mechanism 11 may be used, in which case the upper end of the second gas spring mechanism 11 is at the attachment point 13 on the link 3a and the lower end is on the lower support member B. It is attached to one of the two attachment points 12a and 12b.

In the state shown in FIG. 2, the work desk is in a standing state and the gas spring mechanism 8 is excited. That is, the plunger moves between the upper support member 2 and the link 3a of the parallel link mechanism 3 to double the lifting force. Here, the effective lifting component force of the force applied by the gas spring mechanism 8 does not act at right angles, but is higher from the lower side to the higher side between the upper and lower limits (highest state and lowest state). It is changing from one to a lower one.

3 and 4, the effective (lifting) component is obtained by appropriately selecting the attachment points (six) of the gas spring mechanism 8 between the upper support member 2 and the upper link 3a of the parallel link mechanism 3. It has been shown that the force can be changed. These attachment points are the attachment points 9a on the link 3a,
9b and the attachment points 10a, 10b on the upper support member 2,
It is 10c.

These attachment points are arranged on an arc having a radius C so that the attachment points on the link 3a or the upper support member B can be easily changed. This radius C is equal to the distance between the upper and lower ends of the gas spring mechanism in the fully extended state. That is, the adjustment can be done quickly and easily when the gas spring mechanism is in its maximum working condition.

The chain line (8 ') shows the state of the gas spring mechanism when the auxiliary lifting force is the smallest among the six attachment points, and the solid line (8) shows the auxiliary lifting force. Is the state of the gas spring mechanism when is maximum.

FIG. 4 shows another gas spring mechanism 11 provided between the upper link 3a of the parallel link mechanism 3 and the lower support member B. In this case as well, the auxiliary lifting force can be adjusted in the same manner when the gas spring mechanism 11 is in its fully advanced state (radius D). Chain line (1
1 ') shows the state of the gas spring mechanism when the auxiliary lifting force is minimum, and the solid line (11) shows the state of the gas spring mechanism when the auxiliary lifting force is maximum.

In the case of the illustrated embodiment, 4 × 6 = 24 different auxiliary lifting forces can be obtained. That is, on one side of the work desk, the states 8, 8 ', 1 of the gas spring mechanism are
With the combination of 1 and 11 ', 24 types of auxiliary lifting force can be obtained. In addition to this, various attachment states can be changed by omitting the gas spring mechanism 11 or using two sets of the gas spring mechanisms 8 or 11.

Since the parallel link mechanism can be safely locked by the valve mechanism of the gas spring mechanism 8, the gas spring mechanism 11 does not have to be provided with the valve mechanism in the normal operating state.

[0025]

By the function of the valve mechanism provided in the gas spring mechanism, the auxiliary lifting force can be changed quickly and easily with a simple structure.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of a work desk of the present invention in a seated state.

FIG. 2 is a side view showing an embodiment of the work desk of the present invention in a standing state.

FIG. 3 is a side view showing adjustment of a mounting state of a gas spring mechanism.

FIG. 4 is a side view showing adjustment of a mounting state of a second gas spring mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Desk surface member 2 Upper support member 3 Parallel link mechanism 4-7 Axial fulcrum 8, 11 Gas spring mechanism A Bottom member B Lower support member 9, 10 Mounting point 12, 13 Mounting point 15 Valve driver

Claims (7)

[Claims] 1. An upper support member (2), a lower support member (B), a parallel link mechanism (3) which is rotatably connected to the upper support member (B), and between the upper support member and the parallel link mechanism and / or the lower part. Between the support member and the parallel link mechanism, in cooperation with them, an auxiliary lifting force is applied when the desk is extended upward, and a desk and at least one gas spring mechanism that accumulates potential energy of the load when the desk is reduced downward. The gas spring mechanism (8) between the parallel link mechanism (3) and the upper support member (2) comprises a valve mechanism, and when the valve mechanism is in the open state, the gas spring mechanism is A height-adjustable work desk characterized in that the full force is exerted on the parallel link mechanism (3) and the gas spring mechanism is locked in a standby state when the valve mechanism is closed. 2. The work desk according to claim 1, wherein the upper support member (2) and the parallel link mechanism (3) are provided with two gas spring mechanisms (8, 11). . 3. Work desk according to claim 1, characterized in that the gas spring mechanism (8) comprises a valve driver (13). 4. Two valve drivers (13) are provided on each side of the work desk between the upper support member (2) and the parallel link mechanism (3). Item 3
Work desk described in. 5. The work desk according to claim 4, wherein the two valve driving bodies are simultaneously excited to adjust the work desk. 6. At least one gas spring mechanism (11) between the parallel link mechanism (3) and the lower support member (B).
The work desk according to claim 1, wherein the work desk is provided. 7. The work desk according to claim 6, wherein the gas spring mechanisms (8, 11) are provided at different operating positions so that the auxiliary lifting force can be changed.