DE9407323U1 - Height adjustment device at a table - Google Patents

Description

Applicant: Draenert Studio GmbH, Steigwiesen 3, 88090 Immenstaad/B

Height adjustment device on a table

The innovation concerns a height adjustment device on a table 1. A table of this type consists of a central table base, which is connected via a vertical tube to an upper part, which supports the table top. With such tables, it is desirable to design the table top so that its distance from the floor surface is adjustable in height.

So far, only so-called threaded spindles are known, in which a spindle nut is mounted on a spindle connected to the base part and can be adjusted in height by rotating the upper part or the table top. The disadvantage of this known spindle adjustment, however, is the relatively small height adjustment range. If a larger height difference is to be set, the table top needs to be rotated a large number of times in order to set the required height. In addition, the known height adjustment device is structurally complex and vulnerable.

The innovation is therefore based on the task of developing a height adjustment device according to the generic term of claim 1 in such a way that a rapid height adjustment of the table top in a wider adjustment range is possible using significantly simpler means.

To solve the problem posed, the innovation is characterized by the technical teaching of claim 1.

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The main feature of the innovation is that a stepless height adjustment is now possible because the tube connecting the table base to the upper part is designed as telescopically interlocking inner and outer tubes and that one of the tubes has a clamping part which can be locked (clamped) and unlocked by rotating the table top, thus providing a simple height adjustment device.

The table top is guided and turned with both hands. To adjust the height, loosen the clamping device by 1/4 turn, raise or lower the table top to the desired height and then turn it again with the same 1/4 movement. Fixing can be done in the same direction or in the opposite direction to loosening.

In this way, a simple height adjustment device is proposed which is easy to operate, and in which the table top does not have to be rotated by a large number of turns, but rather the rotation of the table top merely locks or unlocks a clamping device, after which, after unlocking, the table top can be fixed at any desired height.

In this case, it is preferred that the outer tube with a larger outer diameter is attached to the base part, which accommodates the inner tube connected to the upper part.

A guide sleeve is provided at the upper end of the outer tube, which has an eccentric bore 35

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to accommodate the inner tube. The guide sleeve is mounted in a recess on the inner circumference of the outer tube in a rotationally fixed and shift-proof manner.

The outer tube has a connection for additional attachments at its opposite end. This connection can be designed as a thread, as a square , conical or in another suitable manner.

The inner tube and the bore in the guide bush are matched to each other in such a way that the inner tube can easily be moved axially in this bore of the guide bush.

The inner tube also has a shoulder at the end that protrudes into the inner circumference of the outer tube, onto which a clamping sleeve with an eccentric bore is attached.

At the opposite end, the inner tube has a similar connection as the outer tube.

By twisting the inner tube relative to the outer tube, the eccentricities of the guide and clamping sleeve come into effect, whereby the outer diameter of the clamping sleeve rests on the inner diameter of the outer tube and ensures secure axial fixation of the inner tube with the parts attached to it relative to the outer tube.

It is preferred if the inner tube is also designed as a hollow tube. However, this is by no means mandatory.
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The preferred material for the guide sleeve is metal, which may have special sliding properties for better movement of the inner tube. The clamping sleeve, on the other hand, is preferably made of plastic.

In order to keep the weight that the user has to lift as low as possible, it is preferable for the inner tube to be at the top. However, it is of course also possible to turn the entire table over and thus bring the outer tube into the upper position.

In a further development of the innovation, the height adjustment of the table is supported by a spring and a similar force element. It is preferred if the spring is designed as a gas spring and is integrated into the interior of the two tubes. In this way, the spring force is adapted to the weight to be raised or lowered, so that the user only needs to exert a very small amount of force to adjust the height of the table.

The subject matter of the present innovation arises not only from the subject matter of the individual protection claims, but also from the combination of the individual protection claims with one another.

All documents, including the abstract, disclosed information and features, in particular the spatial configuration shown in the drawings, are claimed as essential to the invention insofar as they are new compared to the prior art, individually or in combination.
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In the following, the innovation is explained in more detail using drawings that merely show one way of carrying out the invention. The drawings and their descriptions reveal further features and advantages of the innovation that are essential to the invention.

It shows:

Figure 1 shows a cross-section through the new height adjustment device,

Figure 2 is an enlarged view of the outer tube,

Figure 3 is an enlarged view of the inner tube, 15

Figure 4 a side view of the clamping sleeve,

Figure 5 is a top view of the clamping sleeve, Figure 6 is a side view of the guide sleeve, Figure 7 is a top view of the guide sleeve.

According to Figure 1, the height adjustment device according to the innovation consists of an outer tube 1 in which an inner tube 2 is mounted so as to be axially displaceable in the direction of the arrows 11, 12. At the respective outer ends, the outer tube 1 and the inner tube 2 are connected to corresponding connecting parts 3, 4, which in turn support the table top 14 and the base plate 15, respectively.

A guide sleeve 6 is attached to the upper end of the outer tube; a clamping sleeve 5 is attached to the lower end of the inner tube.

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It is essential that the two sleeves 5,6 have eccentric bores 16,17 so that when the table top 14 is rotated in the direction of arrow 13, the clamping effect of the clamping sleeve 5 is canceled and the inner tube 2 can be axially displaced in the directions of arrows 11,12 relative to the outer tube 11 in the guide sleeve 6.
To re-lock, simply turn it back in the direction of arrow 13.

The entire height adjustment is preferably achieved by rotating the table top 14, then raising or lowering it and rotating it back in the opposite direction.

According to Figure 2, the outer tube is designed as a hollow tube, which has a recess 7 at one end for receiving the guide sleeve 6. At the other end of the outer tube 1, a connection 9 is provided for the connecting part 3, which in this case is designed as an internal thread. Of course, all other suitable types of connection between the outer tube 1 and the connecting part 3 are also possible.

It is preferred if the guide sleeve 6 is mounted in the associated recess 7 on the outer tube 1 in a rotationally fixed and shift-proof manner. This can be achieved by pressing in the guide sleeve 6, or by simply inserting it and then fastening it, e.g. by gluing, cross-screwing, pressing it in places using a hammer and/or by using a square guide sleeve with a square mount.

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The inner tube also consists of a hollow tube, as shown in Figure 3. At one end there is a projection 8 to which the clamping sleeve 5 is attached. Here too, the clamping sleeve 5 is attached to the projection 8 in a rotationally fixed and shift-proof manner. This is done in the same way as with the guide sleeve in the outer tube.

At the opposite end, the inner tube has a connection 10 for the connecting part 4, which can be designed in accordance with the connection 9 on the outer tube 1.

Figures 4 to 7 each show a side view and a top view of the clamping sleeve 5 and the guide sleeve 6.

The two sleeves 5,6 are essentially the same design and only have different sizes. The two sleeves 5,6 are cylindrical and have an eccentric bore 16,17. The attachment 8 of the inner tube 1 is inserted through the bore 16 in the clamping sleeve 5, while the entire inner tube with its outer end is inserted through the bore 17 of the guide sleeve 6.

The sleeves 5,6 can have bevels 18,19 on their axial ends, which on the one hand facilitate insertion into various receptacles and on the other hand reduce the risk of injury when handling the sleeves 5,6.

It is preferred if the guide sleeve 6 is made of metal in order to achieve a relatively low level of wear on this guide sleeve 6. In addition, the material of the guide sleeve 6 is adapted to that of the inner tube 2 in such a way that

a favorable friction pairing is achieved.

This reduces frictional forces and improves the operation of the height adjustment device.

In contrast, it is intended that the clamping sleeve 5 be made of plastic or a material with similar properties. The clamping sleeve 5 rests with its outer circumference on the inner circumference of the outer tube 1 and must absorb the necessary friction forces there in order to prevent axial displacement of the table top 14 with the associated attachments in the directions of the arrows 11, 12 (Figure 1).

In order to avoid permanent damage to the inner circumference of the outer tube and to achieve a strong clamping effect, this clamping sleeve 5 is therefore preferably made of a slightly softer material than that of the outer tube 1.

Therefore, the clamping sleeve 5 can adapt well to the unevenness present on the inner circumference of the outer tube 1 and thus ensure an effective clamping effect.

By using different eccentricities in the sleeves 5,6 it is possible to adapt the new height adjustment device to different diameters of the pipes 1,2. In addition, this change in diameter, possibly together with a change in the length of the sleeves 5,6, allows a very good adaptation of the load capacity of the height adjustment device to the weight that the clamping device has to bear.

With the new height adjustment device for a table, a quick height adjustment of the table top over a wide adjustment range is achieved for the first time using very simple structural means.

Drawing legend

I Outer tube 2 Inner tube

3 Connection part

4 "

5 clamping sleeve

6 Guide sleeve

7 recess (for 6)

8 approach (for 5)

9 Connection (for 3)

10 connection (for 4)

II Arrow direction 12 "

13 "

14 Table top

15 Base plate

16 eccentric bore 17 "

18 bevel

19 "

Claims (11)

&igr;:- Amt1.AZ: G 94 07 323.6 22.02.1995 Applicant: Draenert Studio GmbH 7816.0-D 976-55-wa 05 Protection claims 1. Height adjustment device on a table or the like with a central table base, consisting of a base plate which is connected to a table top via a tube and one or more connecting parts, the tube being divided and consisting of at least two telescopically interlocking tubes (1, 2), characterized in that the outer tube (1) carries a guide sleeve (6) with an eccentric bore (17) at its free end, and the inner tube (2) carries a clamping sleeve (5) with an eccentric bore (16) at its end engaging in the outer tube (1). 2. Height adjustment device according to claim 1, characterized in that the inner tube (2) is designed as a hollow tube. 25 3. Height adjustment device according to one of claims 1 to 2, characterized in that the outer tube (1) has a connection (9) for a connecting part (3) at the end opposite the guide sleeve (6). 4. Height adjustment device according to one of claims 1 to 3, characterized in that the inner tube (2) has at its end opposite the clamping sleeve (5) a connection (10) for a TD8(ku)~06l/ .. - 2 - connecting part (4). 5. Height adjustment device according to claim 3 or 4, characterized in that the connection between the connections (9, 10) and the connecting parts (3, 4) is designed as a threaded connection, clamp connection, press fit or adhesive connection or as a combination of one of these connections. 6. Height adjustment device according to one of claims 1 to 5, characterized in that the guide sleeve (6) is attached to the inner circumference of the outer tube (1) in a rotationally fixed and displacement-proof manner. 7. Height adjustment device according to one of the claims 1 to 6, characterized in that the clamping sleeve (5) is attached to the outer circumference of the inner tube (2) in a rotationally fixed and shift-proof manner. 20 8. Height adjustment device according to one of claims 6 and 7, characterized in that the fastening of the sleeves (5, 6) to the tubes (1, 2) is designed as a press fit, partial caulking or adhesive connection. 9. Height adjustment device according to one of claims 1-8, characterized in that a spring is provided to assist the height adjustment 0. i 10. Height adjustment device according to claim 9, characterized in that the spring is designed as a gas spring. 11. Height adjustment device according to one of claims 9 or 10, characterized in that the spring is mounted in the interior of the tubes (1,2).