EP2446774B1 - Height-adjustment device and height-adjustable table - Google Patents

Description

TECHNICAL AREA

The invention relates to a height adjustment device and a height-adjustable table.

STATE OF THE ART

A height adjustment device and a height-adjustable table are in the document DE 199 19 231 A1 described. The described height adjustment device has an inner and an outer tube which are telescopically movable relative to each other. Furthermore, a bearing device is provided, which supports the inner tube movably supported on the outer tube. Inside the inner tube, a gas pressure cylinder is provided. By means of the height adjustment device, a table top of the table can be arranged at different heights relative to a table frame of the table.

In practice, the above-described storage between the inner and the outer tube has proved to be less torsionally rigid, d. h., The inner tube tilts even at a low load across this against the outer tube. This leads disadvantageously to increased wear and to an increased, noticeable for an operator when adjusting the height of the table top resistance.

In the DE 20 2004 020 323 U1 a table is described with a table top and a tabletop centrally supporting table column. Here, a support tube is provided which, starting from the table top, extending downwards. In addition, a base tube is provided which is fixedly mounted on a base plate. On the base tube, the support tube is guided displaceably by means of a sliding bearing.

The DE 103 29 542 A1 deals with a Hubaggregat, which is to serve for tables or the like. A single column table according to the DE 103 29 542 A1 has a telescopic total column, which is composed of a first and a second column. The first column has an inner and an outer tube, wherein the outer tube forms the second column with a tube surrounding the outer tube. At an upper end of the inner tube, a table top is held. Baskets with rolling bodies are located in intermediate spaces of the pipes. In the lifting unit described in this publication two trained as a gas pressure springs energy storage in the direction of a diagonal of a square inner cross section of the inner tube are arranged side by side.

Object of the following invention is to provide an improved height adjustment device and an improved table, with which the disadvantages described above are at least partially reduced.

PRESENTATION OF THE INVENTION

According to the invention this object is achieved by a height adjustment device with the features of claim 1, by a height-adjustable table with the features of claim 7 and by a height-adjustable table with the features of claim 8.

• Eine Höhenverstellvorrichtung, insbesondere für einen höhenverstellbaren Tisch, mit einem inneren und einem äußeren Rohr, welche zueinander teleskopartig bewegbar sind, mit einem Profilteil, welches innerhalb des inneren Rohres angeordnet ist, und einer Lagereinrichtung, welche das innere Rohr an dem Profilteil in Längsrichtung des Profilteils beweglich lagert. Hierbei ist das Profilteil mit einem Querschnitt gebildet, welcher zumindest abschnittsweise einen Gasdruckzylinder zum Bewegen des inneren Rohrs gegenüber dem äußeren Rohr in sich aufnimmt. Erfindungsgemäß ist der Abschnitt des Profilteils U-förmig ausgebildet. An die U-Form können sich noch weitere Abschnitte des Profilteils anschließen.

Accordingly, it is provided:

• A height adjustment device, in particular for a height-adjustable table, with an inner and an outer tube, which are telescopically movable with each other, with a profile part which is disposed within the inner tube, and a bearing device, which the inner tube to the profile part in the longitudinal direction of the profile part movable stores. Here, the profile part is formed with a cross section which at least partially receives a gas pressure cylinder for moving the inner tube relative to the outer tube in it. According to the invention, the section of the profile part is U-shaped. The U-shape can be followed by other sections of the profile part.

Furthermore, a height-adjustable table with a table frame, with a table top and with the height adjustment device according to the invention, by means of which the table top can be arranged at different heights relative to the table frame.

The idea underlying the present invention is to provide a profile part within the inner tube and to mount the inner tube to the profile part in the longitudinal direction of the profile part movable. As a result, loads acting transversely to the inner tube are now not on the outer Tube, but supported on the (separate) profile part. As a result, the height adjustment is much stiffer than the aforementioned height adjustment. In the height adjustment device according to the invention the profile part is formed on the one hand with a torsionally rigid cross-section and on the other hand, the gas cylinder is added to save space.

From the dependent claims, advantageous embodiments of the invention.

In one embodiment of the height adjustment device according to the invention, the outer tube and the profile part are stationary and the inner tube provided with respect to these movable. Nevertheless, it would also be possible to provide the inner tube stationary and the outer tube and the profile part with respect to this movable. Preferably, the outer tube and the profile part are each secured with one end in the region of the table frame, while the inner tube is fastened with its one end in the region of the table top.

According to a further embodiment of the height adjustment device according to the invention, the bearing device comprises at least one sliding block. A corresponding sliding bearing between the inner tube and the profile part can be implemented with little effort. However, it would also be conceivable to provide the bearing device as a roller bearing, in which case one or more rolling elements would have to be provided between the inner tube and the profile part. Also, the sliding block itself can be formed with rollers.

According to a further embodiment of the height adjustment device according to the invention, the sliding block is attached to the inner profile part, wherein the sliding block slidably or slidably surrounds a portion of the profile part in the longitudinal direction thereof. The sliding block preferably has an approximately C-shaped portion, which slidably or rollingly slidably surrounds a kederförmigen portion of the profile part.

According to a further embodiment of the height adjustment device according to the invention an insert is provided, which has a pedestal on which a gas pressure cylinder for moving the inner tube relative to the outer tube is supported and / or which connects a support member fixed to the outer and / or the profile part. The pedestal also allows shorter gas cylinders to be used with the height adjustment device.

According to a further embodiment of the height adjustment device according to the invention an insert connects the outer tube fixed to the profile part. The insert is preferably designed as a base part. More preferably, the insert is formed as a die-cast part. The insert can be screwed to the outer tube and the profile part. Preferably, the insert has a contour into which the profile part is inserted along its longitudinal direction. As a result, the profile part is well supported against loads which act in the transverse direction against the profile part, on the insert.

According to one embodiment of the table according to the invention, the carrier element is designed as a leg extension tube, which is clamped between the insert and the outer tube. This results in a torsionally rigid connection between the outer tube and the leg boom tube.

CONTENT OF THE DRAWING

The invention will be explained in more detail by means of embodiments with reference to the accompanying figures of the drawings.

Figur 1

in einer perspektivischen Ansicht von schräg unten und lediglich teilweise einen höhenverstellbaren Tisch mit einer Höhenverstellvorrichtung gemäß einem Ausführungsbeispiel der vorliegenden Erfindung;

Figur 2

einen Schnitt A-A aus Fig. 1;

Figur 3

einen Schnitt B-B aus Fig. 2; und

Figur 4

in einer perspektivischen Ansicht zerlegt mehrere Komponenten der Höhenverstellvorrichtung gemäß den Figuren 1-3.

Show it:

FIG. 1

in a perspective view obliquely from below and only partially a height-adjustable table with a height adjustment device according to an embodiment of the present invention;

FIG. 2

a section AA Fig. 1 ;

FIG. 3

a cut BB off Fig. 2 ; and

FIG. 4

in a perspective view disassembled several components of the height adjustment according to the Figures 1-3 ,

In all figures of the drawing, identical or functionally identical elements - unless otherwise indicated - have been given the same reference numerals.

DESCRIPTION OF EMBODIMENTS

FIG. 1 shows a height-adjustable table 1 with a table frame 2 and a table top. 3

The table 1 is constructed symmetrically with respect to the section line A-A.

The table frame 2 is composed for example of two vertical supports 4 (only one is in FIG. 1 to see), one vertical column 5, two horizontal struts 6 (only one is in FIG. 1 see) and leg braces 7 together with rollers 8 together. The horizontal struts 6 each connect at their one end via corner connector 12 to the vertical supports 4. At its other end connect the horizontal struts 6 by means of a corner connector 13 to the column 5. The horizontal struts 6 extend in a top view in FIG. 1 seen at an acute angle to each other. Opposite the end of the column 5, which carries the corner connector 13, the column 5 is supported on the leg arms 7 together with the rollers 8 on a bottom, not shown. The table 1 can be simply moved on the ground that the vertical supports 4 are raised by an operator and this then moves the table 1 on the rollers 13 to the desired position and there drops the vertical supports 4 back to the ground.

The column 5 is formed as an outer tube and part of a generally in FIG. 1 14 designated height adjustment device. The height adjustment device 14 is designed to arrange the table top 3 at different heights relative to the table frame 2.

The height adjustment device 14 further comprises an inner tube 15, see Figures 2-4 , The outer tube 5 and the inner tube 15 are preferably formed as extruded profiles, which according to the embodiment have a rectangular cross-section. The inner tube 15 is telescopically movable relative to the outer tube 5, ie, the inner tube 15 is always at least partially disposed in the outer tube 5. A gap 16, see FIG. 3 , between the inner tube 15 and the outer tube 5 is formed as small as possible, inter alia, to give a good visual impression when the inner tube 15 is at least partially moved out of the outer tube 5.

Furthermore, the height adjustment device 14 has a profile part 17, see Figures 2-4 , on. The profile part 17 is disposed within the inner tube 15. The profile part 17 is also preferably formed as an extruded profile, which according to the embodiment with a U-shaped cross-section 21, see Figures 3 and 4 , is formed. The cross section 21 of the profile part 17 may further comprise two kederförmige sections 22, which adjoin in the region of a junction 25 between webs 23 and a base 24 of the U-shaped cross section 21 thereto.

Furthermore, the height adjustment device 17 has a bearing device 26, see Figures 2-4 on. By means of the bearing device 26, the inner tube 15 on the profile part 17 in the longitudinal direction L, which in the present case corresponds to the vertical direction of the table 1, that is perpendicular to the table top 3, movably mounted so that the inner tube 15 out of the outer tube 5 and into this is movable into it.

While the outer tube 5 and the profile part 17 are provided stationary, the inner tube 15 is provided movable relative to these. This is one in the Figures 2 and 4 illustrated insert 27 is provided which is fixedly connected to the outer tube 5 and the profile part 17. The insert 27 is preferably composed of a central contour 31 and to these subsequent lateral portions 32 together. The lateral sections 31 are each by means of screws 33, see FIG. 3 , bolted to corners 34 of the outer tube 5. A wall 48, see FIG. 2 , the leg tube 7 designed as a unitary tube is between the lateral portions 32 of the insert 27 and the end face 49, see FIG. 4 , the outer tube 5 braced.

The contour 31 is formed such that the profile part 17 can be inserted in the longitudinal direction L in the contour 31, see FIG. 4 , or is inserted, see Figures 2 and 3 , The contour 31 has, for example, a pedestal 35 and two short webs 36 and a long web 37, see Fig. 4 , The pedestal 35 engages the U-shaped cross-section 21, while the kederförmigen portions 22 each extend between a web 36 and the web 37 therethrough. Thus, the inserted into the contour 31 profile member 17 is well supported against loads which act transversely to the longitudinal direction L, supported. In order to prevent movement of the profile 17 in its longitudinal direction L, the contour 31 can be connected to the profile part 17 by means of screws 41 (FIG. FIG. 4 only shows corresponding holes).

Like that Figures 2 and 3 can be seen, a gas pressure cylinder 42 is disposed within the U-shaped cross section 21 of the profile part 17. The gas cylinder 42 is supported at its lower end 43 on the pedestal 35, see FIG. 2 , from. The gas pressure cylinder 42 is designed with a piston 44 which, supported by gas pressure, moves out of an upper end 46 of the gas pressure cylinder 42, thereby lifting the table top 3. This is done in response to an actuation of the gas pressure cylinder 42 by means of an actuator, for example in the form of levers 45, by an operator. By actuating the actuating means, the gas pressure cylinder 42 thereof is moved from a blocking position thereof in which the position of the piston 44 with respect to the gas pressure cylinder 42 and thus the height of the table top 3 with respect to the table frame 2 is set in a release position in which the piston 44 with respect the gas pressure cylinder 42 is movable. Of course, the table top 3 again by pressing down against the gas pressure of the gas cylinder 42 down are moved, in which case the piston 44 is pushed back into the gas pressure cylinder 42.

The piston 44 is connected at its free end 47, for example by means of an attachment 51 fixed to the inner tube 15 so that it moves with the movement of the piston 44. Thus, the piston 44 is hidden at any height of the table top 3 for the operator person not visible from the inner tube 5, so that an optically advantageous impression. The table top 3 may be fixed immovably to the attachment 51. Alternatively, the table top 3 can be pivotally mounted on the attachment 51, so that the table top 3 can be pivoted into a substantially horizontal and substantially vertical position relative to the attachment 51 and thus relative to the table frame 2.

The bearing device 26 includes, for example, four sliding blocks 52, wherein in each case two of the sliding blocks 52, see FIG. 3 , with one of the kederförmigen portions 22 along the longitudinal direction L and spaced from each other in sliding engagement. For this purpose, the sliding blocks 52 are preferably provided with a C-shaped section 53, see Figures 3 and 4 formed, with which they engage around the kederförmigen portions 22 each in a plane transverse to the longitudinal direction L positively.

As an alternative to a sliding bearing between the sliding blocks 52 and the kederförmigen sections 22, there is the possibility that between the sliding blocks 52 and kederförmigen sections 22 rollers, in particular balls, are provided for a rolling storage. For example, balls may be integrated in the sliding blocks 52 or in the C-shaped sections 53, which each roll against a kederförmigen section 22. The sliding blocks 52 are each with firmly connected to the inner tube 15, in particular by means of screws 54, see FIG. 2 , screwed.

FIG. 2 shows the retracted position of the inner tube 15, which is completely recessed in the outer tube 5, ie the table top 3 is located at its lowest position relative to the table frame 2. Now actuates an operator, the actuator 45, in particular the lever 45, the Adjusted gas cylinder 42 from its blocking position to its release position, whereupon the table 3 together with the inner tube 15 and the piston 44 in Fig. 2 moves upwards.

Although the invention has been described with reference to preferred embodiments, it is by no means limited thereto, but modifiable in many ways. In particular, it should be noted that the presently described for the height adjustment device embodiments and embodiments according to the invention are applicable to the height-adjustable table, and vice versa. In addition, it should be noted that "a" none excludes a variety.

LIST OF REFERENCE NUMBERS

1

table

2

table support

3

tabletop

4

vertical support

5

vertical column

6

horizontal strut

7

leg boom

8th

role

11

horizontal prop

12

Corner connector

13

Corner connector

14

height adjustment

15

inner tube

16

gap

17

profile part

18

swivel axis

22

plate

21

U-shaped cross-section

22

kederförmiger section

23

web

24

Base

25

junction

26

Storage facility

27

commitment

31

contour

32

lateral section

33

screw

34

corner

35

podium

36

web

37

web

41

screw

42

Gas cylinder

43

The End

44

piston

45

lever

46

lever

47

The End

48

gap

51

essay

52

slide

53

C-shaped section

54

screw

Claims (8)

1. A height-adjusting device (14), in particular for a height-adjustable table (1),

   - having an inner and an outer tube (15, 5), which are movable telescopically relative to one another;

   - having a profile part (17), which is arranged inside the inner tube (15); and

   - a bearing means (26), which mounts the inner tube (15) on the profile part (17) in a manner such that it is movable in the longitudinal direction (L) of the profile part (17),

   the profile part (17) being formed with a cross-section (21), which at least in part accommodates a gas cylinder (42) for moving the inner tube (15) relative to the outer tube (5), characterised in that the portion (21) of the profile part (17) is of U-shaped construction.
2. A height-adjusting device according to claim 1, characterised in that the outer tube (5) and the profile part (17) are stationary and the inner tube (15) is provided to be movable relative thereto.
3. A height-adjusting device according to either one of the preceding claims, characterised in that the bearing means (26) comprises at least one sliding block (52).
4. A height-adjusting device according to claim 3, characterised in that the sliding block (52) is mounted on the inner tube (15) and engages around a portion (22) of the profile part (17) so as to slide in the longitudinal direction (L) thereof.
5. A height-adjusting device according to any one of the preceding claims, characterised in that an insert (27) is provided, which comprises a platform (35), on which a gas cylinder (42) is supported for moving the inner tube (15) relative to the outer tube (5), and/or which connects a support element (7) firmly to the outer tube (5) and/or the profile part (17) and/or which comprises a contour (31) in which the profile part (17) engages form-fittingly in a plane transverse of the longitudinal direction (L).
6. A height-adjusting device according to any one of the preceding claims, characterised in that an insert (27) connects the outer tube (5) firmly to the profile part (17).
7. A height-adjustable table (1),

   - having a table frame (2);

   - having a table top (3); and

   - having a height-adjusting device (14) according to any one of the preceding claims, by means of which the table top (3) may be arranged at different heights relative to the table frame (2).
8. A height-adjustable table (1),

   - having a table frame (2);

   - having a table top (3); and

   - having a height-adjusting device (14) according to claim 5 or claim 6, by means of which the table top (3) may be arranged at different heights relative to the table frame (2),

   wherein a support element takes the form of a pedestal foot tube (7), which is clamped between the insert (27) and the outer tube (5).

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