JPS6022817Y2 - Height adjustment device for desks, etc. - Google Patents

Description

[Detailed description of the invention] This invention has a pair of left and right legs consisting of an upper leg that is vertically installed on the lower surface of the side plate of the top plate and a lower leg that is fitted into the upper leg so as to be able to slide up and down. The present invention relates to a height adjustment device for a desk, etc., which can be expanded and contracted in different directions.

Heretofore, as this type of height adjustment device, there has been known a height adjustment device configured so that both legs can be adjusted to expand and contract at the same time by rotating a negative operation bundle.

By the way, in conventional devices with such a configuration, no special consideration is usually given to the mounting position of the operating bundle, and this mounting position is inevitably determined depending on the structure of the height adjustment device. The reality is that

Therefore, in general, the operation bundle is often attached to the top of the top, deep below the top, or on the side of the top.

However, when mounted on the top plate, it has the advantage that the bundle can be easily operated, but on the other hand, the mounting hole of the operation bundle is exposed on the top surface of the top plate, which affects the functionality and appearance of the top plate. This is extremely inconvenient.

Further, when the bundle is installed deep under the top plate, although the appearance is good, the bundle must be operated in an unnatural posture, and the height cannot be adjusted easily.

Furthermore, if it is attached to the side of the top plate, there will be no inconvenience as in each of the above cases, but due to the nature of desks, etc., which are often placed near the wall, the wall will get in the way and make bundle operation easier. There are some serious inconveniences.

In other words, there is an inconvenience that a desk or the like cannot be placed next to a wall.

The present invention has been made in view of the above-mentioned circumstances, and provides a height adjustment device for a desk, etc., which is devised so that the bundle operation can be performed at a location where the above-mentioned inconveniences will not occur.

Next, one embodiment will be described with reference to FIGS. 1 to 4.

This embodiment relates to an example in which the present invention is applied to a desk made of wood as shown in FIG.

In the desk made of wood material shown in FIG. 1, an upper part 1 including a top plate and the like and a lower part 2 including a sleeve extractor and the like are separated from each other using wood material.

Each of the constituent parts of the picture parts 1 and 2 is made of a wooden board made by adhering plywood to a core material such as Particleboard F.

In addition, in the following description, anything not specifically mentioned is made of the above-mentioned wooden board.

The upper part 1 is extracted from the bottom side of a top plate 5 having left and right side plate parts 3 and 4, and 6 and 7 are arranged thereon, and a bookshelf 8 is arranged on the top plate 5.
will be established.

Approximately central portions of the side plate portions 3 and 4 in the front and back direction are connected to each other by a hollow rectangular columnar metal connecting body 9 extending in the left and right direction below the top plate 5 and at the rear of the top plate 5 and the rear portions 6 and 7. In this way, the upper part 1 is reinforced.

That is, a pair of L-shaped metal mounting plates 10.10 are welded to the left and right ends of the connecting body 9, and cutout recesses are formed in the left and right ends of the connecting body 9 to form the side plate portions 3.4, respectively. 3a*4a
The mounting plates 10, 10 are fitted into the side plate parts 3, 4.
They are fixed to the lower and inner surfaces of the 11, 11, respectively.

On the lower surfaces of the side plates 3 and 4, that is, on the lower surfaces of the left and right ends of the connecting body 9, a pair of hollow rectangular columnar metal upper legs 12,
12 is welded in a hanging shape.

Note that each upper leg 12 is directly welded to each mounting plate 10.

The lower part 2 also has left and right side plates 13.14 facing each other with a distance substantially the same as the distance between the upper legs 12.12, and a sleeve 15 is fixed to the right side plate 14. A storage shelf 16 is interposed and fixed between the sleeve extractor 15 and the left side plate 13.

Embedded in each of the side plates 13 and 14 are metal lower legs 17 into which the upper legs 12 can be vertically slidably inserted.

Each lower leg 17 has a hollow rectangular columnar outer cylinder 17a and an inner cylinder 17b.
A sliding auxiliary body 17c made of synthetic resin and having a rectangular short cylinder shape is fitted and fixed to the upper end of the outer cylinder 17a.

Therefore, each upper leg 12 is fitted inside the sliding auxiliary body 17c and externally fitted onto the inner cylinder 17b, and is supported by the lower leg 17 so as to be vertically slidable.

A screw shaft 18 extending in the vertical direction is rotatably supported in each of the upper legs 12, and the screw shaft 18 is screwed into each lower leg 17, that is, at the upper end of each inner cylinder 17b. The inserted female screw body 19 is fixed.

Each screw shaft 18 has its upper end connected to the connecting body 9 and the mounting plate 10.
The shaft is supported rotatably and immovably in the axial direction.

It should be noted that both screw shafts 18, 18 have the same pitch etc. except for the screw directions being different.

That is, the left screw shaft 18 has a left-hand thread, and the right screw shaft 18 has a right-hand thread.

Further, the left side plate 3 of the top plate 5 has a space 3b extending from the notch recess 3a into which the left end of the connecting body 9 is fitted to the front side of the left side plate 3. The connecting body 9 is communicated with through a communication hole 9a formed in the connecting body 9.

In the interior of the left side plate portion 3, that is, the space portion 3b,
A rotary operating shaft 20 extending in the front-rear direction is rotatably supported via bearings 21 and 22.

The front end of the rotary operating shaft 20 is shaped like a mounting portion 20a having a square or polygonal cross section, and the operating bundle 23 is attached to the left side plate portion 20a as shown in FIG. It is configured such that it can be detachably attached through an attachment hole 3c formed in the front end surface of the holder.

Therefore, by rotating the operation bundle 23 on the front side of the left side plate portion 3, the rotation operation shaft 20 can be rotated.

Note that the operation bundle 23 is attached to the mounting portion 20 of the rotating operation shaft 20.
The mounting hole 3c is designed to be closed with a cap (not shown) made of rubber or synthetic resin when the mounting hole 3c is removed from the mounting hole 3a.

Furthermore, inside the connecting body 9, the operation bundle 2
3, the rotational force of the rotation operation shaft 20 is applied to the both screw shafts 18.1
A rotational force transmission mechanism 24 for transmitting force to each screw shaft 18 is housed in order to make the relative screwing amount of the screws 19 and 19 of the screws 19 and 19 the same amount in the same direction.

That is, as shown in FIGS. 2 to 4, this rotational force transmission mechanism 24 has a bevel gear 25 fixed to the rear end of the rotary operation shaft 20 and a bevel gear 26 fixed to the left screw shaft 18.
The circular shafts 18, 2\0 are interlocked with each other, and the other end of the rotary link 27 is fixed to the upper end of each threaded shaft 18, and the double concave groove links 27, 27
At the other end, both ends of a connecting link 29 supported via a long hole 29a on a support shaft 28 whose center portion is fixed to the connecting body 9 are pivotally connected 30, 30.

Next, the operation of the above embodiment will be explained.

Now, for example, when the operation bundle 23 attached to the rotary operation shaft 20 is rotated counterclockwise (in the direction of the arrow in FIG. 1) from the state shown in FIG. 4A, the bevel gear 25. 26, the left-hand screw shaft 18 and rotary link 27 are rotated and rotated counterclockwise, and at the same time, as the left-hand rotary link 27 rotates, the right-hand rotary link 27 is rotated through the connecting link 29. It is rotated clockwise (see Figure 4 BXC).

Therefore, the left screw shaft 18, which is a left-hand thread, and the right screw shaft 18, which is a right-hand thread, are each rotated by the same amount in the direction of the arrow shown in FIG.
．． is screwed downward by the same amount relative to 19,
The height is adjusted to lower the desk.

Further, when the operation bundle 23 is rotated in the opposite direction to the above case, the height of the desk can be adjusted by the same effect as described above.

After adjusting the height, the operating bundle 23 is rotated to the operating shaft 2.
After removing it from the mounting portion 20a of No. 0, the mounting hole 3c is closed with a cap (not shown).

Note that the height adjustment device according to the present invention is not limited to the above-mentioned embodiment, and for example, the rotational force transmission mechanism 24 may be configured as shown in FIG. 5.

That is, in the one shown in FIG. 5, the connecting link 29 in the previous embodiment is eliminated, and one end of the connecting links 29', 29' is pivoted to the two rotating links 27, 27, respectively.
L, the other ends of both connecting links 29', 29' are pivoted 33 to a rotating link 32 which is pivotally supported 31 on the connecting body 9.

Each connecting link 29', like the connecting link 29,
It is supported by a support shaft 28' fixed to the connecting body 9 via an elongated hole 29'a.

With this configuration, both rotary links 27.27 are rotated in the same direction as the rotary operation shaft 20 rotates, that is, both screw shafts 18.18 are rotated in the same direction. Unlike the present invention, both screw shafts 18, 18 can be made of the same screw, which is advantageous in terms of manufacturing economy.

Further, the reciprocating means between the screw shafts 18, 18 may not be a link mechanism as in each of the embodiments described above, but may be constructed, for example, by a chain transmission mechanism consisting of a sprocket and an endless chain.

Further, the rotary operation shaft 20 may be disposed on the right side plate portion 4.

Even in this case, since the rotation operation of the operation bundle 23 is performed on the front side of the right side plate part 4, the sleeve extractor 15, which is generally arranged on the right side of a desk, etc., gets in the way and makes it difficult to perform the bundle operation. There is no need to worry.

Furthermore, the present invention can be applied not only to a desk made of wood as shown in FIG. 1, but also to a desk or drafting table made of steel in the same manner as in the above embodiment.

As is clear from the above explanation, according to the height adjustment device of the present invention, the height of a desk, etc. can be adjusted satisfactorily by simply rotating the - operation bundle. Since the bundle operation can be performed on the front side of the side plate portion of the top plate, the height adjustment can be performed easily without causing the inconvenience of having to perform the bundle operation in an unnatural posture.

Furthermore, since the bundle operation can be performed while the user of the desk or the like is sitting on a chair, the height can be adjusted extremely easily and accurately to suit the height of the user.

In addition, since the operation bundle is attached to the front side of the side panel of the top plate, there are no problems in terms of appearance and functionality, such as when the mounting hole is provided on the top of the top plate.
This never occurs.

Furthermore, since the operation bundle is operated on the front side of the side panel, it can be used even when a desk, etc. is placed in any location, such as near a wall, or when items are stored in a storage shelf, etc. under the top plate. Also, the bundle operation can be performed satisfactorily without being obstructed by the walls, stored items, etc.

[Brief explanation of the drawing]

1 to 4 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 ■-n in Figure C), 3rd
The figure is a longitudinal side view (the cross section is along the mm line in Figure 4A),
4A and BXC are transverse plan views showing different operating states (the cross section is along the line IV-IV in FIG. 2),
FIG. 5 is a cross-sectional plan view corresponding to FIG. 4 showing another embodiment. 3.4...Side plate part, 5...Top plate, 9.
...Connection body, 12... Upper leg, 17...
...lower leg, 18...screw shaft, 19...
・Female screw body, 20...Rotary operation shaft, 23...
. . . Operation bundle, 24 . . . Rotational force transmission mechanism.

Claims (1)

[Scope of utility model registration request] Height adjustment that vertically expands and contracts a pair of left and right legs consisting of a hollow columnar upper leg that is vertically installed on the lower surface of the side plate of the top plate and a lower leg that is fitted into the upper leg so as to be slidable up and down. The apparatus comprises a device in which a screw shaft along the vertical direction is rotatably supported in each upper leg, and a female screw body with the screw shaft screwed into each lower leg is fixed to the inside of the side plate portion and both side plate portions. A rotational operation shaft to which an operation bundle that can be rotated on the front side of the side plate portion is detachably connected is disposed inside the connecting body that connects the two. In order to make the relative threading amount of the screw shaft to the female threaded body the same amount in the same direction,
A height adjustment device for desks, etc., which houses and arranges a rotational force transmission mechanism that transmits to each screw shaft.