JPS5934353Y2 - Height adjustment device for desks, etc. - Google Patents

Description

[Detailed description of the invention] The present invention consists of a pair of opposing legs, each consisting of a hollow columnar upper leg and a lower leg that are slidably fitted in the vertical direction, and whose lower ends are connected by a connecting girder. The present invention relates to an improvement in a height adjusting device for a desk or the like, which is configured to adjust the height of a top plate by vertically expanding and contracting legs.

Hitherto, various structures have been developed as this type of height adjustment device. For example, a female screw has a screw shaft rotatably supported in each upper leg and a screw shaft screwed into each lower leg. A crank body is fixed to the upper end of each screw shaft, both crank bodies are interlocked and connected by a connecting plate, and one crank body is detachably attached to the operating lever.
A device configured to be rotated is known.

According to this device, by simply rotating the operating handle (-), both screw shafts can be rotated at the same time, allowing the height of the desk, etc. to be adjusted without having to adjust the extension and contraction of each leg separately. This can be done conveniently while remaining grounded.

However, since it is impossible to position the operating handle under the top plate due to the presence of the legs, there is no choice but to position it on the top plate, and a mounting hole is drilled in the top plate.
It is necessary to configure the operating handle to be attached to the one crank body through this attachment hole.

Therefore, the presence of the mounting hole has caused problems such as impairing the appearance and function of the top plate.

In addition, since it is not preferable to leave the connecting plate (and crank body) exposed, a storage case is provided at the bottom of the top plate to store the connecting plate (and crank body). There was a problem in that the external appearance of the desk, etc. became extremely complicated and unsightly.

In view of the above-mentioned points, the present invention uses a hollow connecting girder that connects the opposing leg bodies, which is often provided for reinforcement purposes in desks, etc., and has at least both screws in the connecting girder. We propose storing a rotational force transmission mechanism for transmitting rotational operating force to the shaft, thereby improving the appearance of the entire desk, including the top plate, and conveniently and efficiently adjusting its height. The present invention provides a height adjustment device for desks, etc., that can be adjusted.

Next, one embodiment will be described with reference to FIGS. 1 to 6.

This embodiment relates to an example in which the present invention is applied to the desk shown in FIG.

In FIG. 1, 1 is a top plate, 2 and 2 are a pair of legs provided oppositely to support the top plate 1, and each leg 2 is a hollow rectangular column fixed to the top plate 1. An upper leg 3 and a lower leg 4 in the shape of a hollow rectangular column that is fitted into the upper leg 3 from below so as to be slidable up and down.
It consists of

The center portion of a hollow rectangular columnar grounding body 5 is fixed to each lower leg 4, and a hollow rectangular columnar connecting girder 6 is connected horizontally between the center portions of both grounding bodies 5, 5. has been done.

Note that each grounding body 5 and the connecting girder 6 are connected in a communicating state.

A screw shaft 7 extending in the vertical direction is rotatably supported in each lower leg 4 but not movable in the vertical direction, and a female screw into which the screw shaft 7 is screwed is supported in each upper leg 3. The body 8 is fixed.

Also, in each leg body 2, an upper leg 3 and a lower leg 4 are inserted into the screw shaft 7, and the upper end is pressed against the female screw body 8, and the lower end is pressed against the grounding body 5 side. A compression coil spring 18 is interposed between them.

Furthermore, a rotation link 9a, an operation link 9b, and both 9
A crank-shaped rotary operating body 9 having a support shaft 9C connecting one end portions of the axes a and 9b is rotatably supported around the support shaft 9C.

At the other end of the operating link 9b exposed outside the connecting beam 6, an operating lever 10 is pivotably attached to the connecting link 1 so as to be rotatable on a horizontal plane.
1 has been done.

In the connecting girder 6 (and the grounding body 5.5), the rotational force of the rotary operation body 9, that is, the rotary link 9a is transferred to both screw shafts 7,
A rotational force transmission mechanism 12 is provided to transmit the rotational force to each screw shaft 7 in order to make the relative screwing amount of the screws 7 to the female screw bodies 8, 8 the same amount in the same direction.

In this embodiment, as shown in FIGS. 2 and 4, in this embodiment, one end of each rotary link 13 is fixed to the lower end of each screw shaft 7, and the other end of each rotary link 13 is fixed to the lower end of each screw shaft 7. One end of the connecting plates 14 each having a long hole 14a in the center is rotatably connected 15 through the long hole 14b, and the other ends of both connecting plates 14 and 14 are connected to the rotary link of the rotary operating body 9. 9
16 rotatably connected to a, long holes 14 in each connecting plate 14
a are respectively inserted and supported by support shafts 17 protruding from the connecting girder 6.

For example, when the rotary operating body 9 is rotated counterclockwise with the operating lever 10 from the state shown in FIG.
is moved in the direction of the arrow and is also oscillated around the support shaft 17, whereby each rotary link 13 is rotated clockwise (see FIGS. 5 and 6), and both screw shafts 7 , 7 are rotated clockwise by the same amount.

Both screw shafts 7.7, rotary links 13.13, and connecting plates 14.14 have the same shape, and the rotary operating body 9
Depending on the rotation operation, the female screw body 8 of both screw shafts 7, 7,
Therefore, the height of the desk can be adjusted by moving the top plate 1 in parallel in the vertical direction with the same amount of expansion and contraction of both legs 2 and 2. ing.

Note that each screw shaft 7 is a square screw, and when the screw shaft 7 is rotated clockwise as described above, the height is adjusted to raise the height of the desk.

In addition, in this embodiment, a compression coil spring 18 is particularly inserted into each screw shaft 7, and the top plate 1 (and the top plate 1
The influence of the weight of a heavy object (such as a book case attached above) on the threaded joint between the screw shaft 7 and the female threaded body 8 is reduced as much as possible, thereby preventing the rotation of the screw shaft 7. Rotating operation body 9
It is designed to allow rotation operations to be performed on chestnuts.

This is particularly useful when adjusting the desk to a higher height.

With the above configuration, since the rotational force transmission mechanism 12 is housed within the existing connecting girder 6, there is no need to provide a separate storage case to house the mechanism 12.
The appearance and function are not impaired in any way.

Further, since the rotary operating body 9 is disposed at the center position between the legs 2, 2, the rotating operation of the rotary operating body 9 using the operating lever 10 can be performed satisfactorily without being obstructed by the legs 2.

Further, the rotation operation of the rotary operation body 9 using the operation lever 10 can be performed simply by pushing and pulling the operation lever 10, as shown in FIG. 3, and can be performed very easily.

That is, for example, when the operating lever 10 is pushed forward from the solid line position and brought to the dashed-dotted line position, the rotary operating body 9 is rotated in the direction of the arrow, and further pulled rearward from the dashed-dotted line position to the position shown by the double-dashed line. , the rotary operating body 9 is further rotated in the direction of the arrow.

When the height is not adjusted, the operating lever 10 should be placed in a position where it does not protrude from the connecting girder 6 (for example, the position indicated by the three-dot chain line in Figs. 2 and 3), so that it does not get in the way. do not have.

Note that the operating lever 10 (and the operating link 9b) can also be devised so as to be housed within the connecting beam 6.

Further, the operating lever 10 may be connected to the rotary operating body 9 via a ball joint or the like, and configured to be able to rotate not only in the horizontal direction but also in the vertical direction, and the configuration is arbitrary. .

For example, when rotating the rotary operating body 9 by push/pull operations, it may be shaped as shown in FIG. 7 or 8 so that the push/pull operations can be performed more easily.

Moreover, if the spring 18 is provided to apply a predetermined upward pressing force to the top plate 1 as in the embodiment described above, the rotation operation of the rotary operation body 9 can be performed more easily.

In addition, since the upper leg 3, which is fixed to the top plate 1, is fitted over the lower leg 4, drawers etc. can be conveniently fixed to the upper leg 3 without interfering with the expansion and contraction of the legs 2. be.

Note that the rotational force transmission mechanism 12 for transmitting the rotational force of the rotary operating body 9 to each screw shaft 7 is not limited to the above-mentioned embodiment, and may use a bevel gear, for example, as shown in FIG. I can do it.

That is, a rotating shaft 19.19 that can be rotatably supported horizontally in the connecting girder 6 is connected to the rotating operating body 9 by a bevel gear connection 20.
Furthermore, each rotating shaft 19 and each screw shaft 7 are connected by a bevel gear connection 21.

In addition, a compression coil spring 18 is fitted into each screw shaft 7 connected to the bevel gear connection 21, as in the previous embodiment, so that the rotation of the screw shaft 7, that is, the rotation operation of the rotary operation body 9 can be performed smoothly and favorably. It is now possible to do so.

Furthermore, in the above embodiments, the present invention was applied to a desk in which the top plate 1 was supported by a pair of legs 2.2, but the present invention can be similarly applied to a desk having four legs or a desk-like table. Of course, it is suitable for use with scales.

In any case, as is clear from the above explanation, the height adjustment device for desks, etc. of the present invention accommodates the rotational force transmission mechanism arranged between the opposing legs within the existing connecting girder. As a result, there is no need to change the external shape of the desk or the like, and the external appearance and function of the desk etc. are not impaired.

Furthermore, since the rotary operation body is disposed at the center of the road between the legs, the rotation operation can be performed easily and satisfactorily without being hindered by the legs.

Moreover, since a compression coil spring is inserted into each screw shaft, the influence of the top plate's own weight on the threaded joint between the screw shaft and the female screw body is reduced as much as possible, which allows the screw shaft to rotate. The rotation operation of the operating body can be performed easily and favorably.

According to the device for adjusting the height of a desk, etc. of the present invention, the height of the desk, etc. can be adjusted very conveniently and satisfactorily by simply rotating the rotary operating body (-) while keeping the desk, etc. on the ground. Vine.

[Brief explanation of drawings]

1 to 6 show an embodiment of a desk equipped with a height adjustment device according to the present invention. FIG. 1 is a perspective view, and FIG. (along line II-II)
, FIG. 3 is a cross-sectional plan view of the main part along the line III-III in FIG. 2, FIG. 4 is a cross-sectional plan view along the IV-IV line in FIG. 2, and FIGS. 4 is a cross-sectional plan view showing a different operating state from that shown in FIG. 4, FIG. 7 and FIG. 8 are perspective views showing modified examples of the operating lever, and FIG. FIG. 1...Top plate, 2...Legs, 3...
...Upper leg, 4...Lower leg, 6...Connection girder, 7...Screw shaft, 8...Female screw body, 9
... Rotating operation body, 12 ... Rotational force transmission mechanism, 18 ... Compression coil spring.

Claims (1)

[Scope of utility model registration request] A height that allows a pair of opposing legs to be adjusted vertically to expand and contract, consisting of hollow columnar upper and lower legs that are fitted in a vertically slidable manner and whose lower ends are connected by a connecting girder. This is a height adjustment device in which a screw shaft extending in the vertical direction is rotatably supported in each lower leg with a compression coil spring inserted into the screw shaft, and a female screw body is fixed in each upper leg. The screw shaft is screwed into the female screw body, and the compression coil spring is brought into contact with the female screw body (two female screw bodies), and the connecting girder is configured to have a hollow shape, and the connecting girder is inserted into the female screw body at approximately the center between the two leg bodies. A rotational force transmission mechanism is housed and disposed to transmit the rotational force of the rotary operating body disposed in the screw shaft to each screw shaft so that the relative threading amount of both screw shafts with respect to the female screw body is the same in the same direction. A height adjustment device for desks, etc.