WO2007073858A1

WO2007073858A1 - Telescope-type arrangement of parts, e.g. table leg

Info

Publication number: WO2007073858A1
Application number: PCT/EP2006/011923
Authority: WO
Inventors: Hellmuth Moll
Original assignee: Hellmuth Moll
Priority date: 2005-12-15
Filing date: 2006-12-12
Publication date: 2007-07-05
Also published as: RU2411894C2; RU2008151405A; EP1959790A1; DE102006022167B3

Abstract

Disclosed is a telescope-type arrangement of parts (11) that has an elongate shape, e.g. a table leg, comprising a tubular outer part (12) and an inner part (14) which is inserted into the outer part (12) so as to be movable in a longitudinal direction (13) and protrudes from the outer part (12). The external face of the inner part (14) is provided with a wedge groove (15) which extends in the longitudinal direction (13) and encompasses walls (16, 17) that slope inward towards each other while the outer part (12) is fitted with a wedge piece (25) which engages into the wedge groove (15) and encompasses sides (26, 27) that are sloped according to the walls (16, 17) of the wedge groove. An actuating mechanism (28) that is disposed on the outer part (12) and is accessible via the external face thereof allows the wedge piece (25) to be displaced between a released position in which the outer and inner part (12, 14) are adjustable relative to one another and a clamped position in which the outer and inner part (12, 14) are clamped together by moving the wedge piece (25) into the wedge groove (15).

Description

Hellmuth Moll, 73347 Mulhouse

Telescopic part arrangement, for example table leg

The invention relates to a telescopic part arrangement elongated shape, such as table leg.

Telescopic parts arrangements of this type can be used in many fields, especially in furniture, when an adjustment of the respective piece of furniture in height is desired. This is the case for example with desks, especially if they are intended for children and adolescents, or shelves, etc.

Conventional telescopic part arrangements have the disadvantage that they are not wobble-free even in the clamped state. By way of example, such telescoping part arrangements may be mentioned, in which the inner part contains a hole arrangement penetrating in the longitudinal direction and the inner part in a transverse direction extending transversely to the longitudinal direction, wherein the outer part has at least one pair of mutually transversely opposite plug holes and one Plug holes and the hole arrangement durch- transverse clamping bolt is present, on each side of the outer part a clamping stop is arranged. The distance between the clamping stops from each other can be changed to clamp the outer part and the inner part in their respective relative longitudinal position. In this case, a tightening in clamping bolt direction, but this distortion does not act transversely to the longitudinal direction of the clamping bolt, so that in the transverse direction, a wobble in the extent of existing between the outer part and the inner game is possible.

DE 1 219 290 B discloses a telescopic tube with a clamping device, in particular as a leg of height-adjustable tables or chairs. Here, a tubular outer part and a relative to this displaceable inner part and a clamping device is provided, which has an eccentric lever, which presses a displaceably mounted clamping pin against the inner part, whereby a clamping of the outer and inner part is achieved. The clamping pin engages in a slidably disposed in a longitudinal groove of the inner part key.

Object of the present invention is to provide a telescopic part assembly of the type mentioned, in which in the various relative longitudinal positions always a stable and wobble-free cohesion of outer part and inner part results.

This object is achieved by a telescopic part assembly with the features of claim 1. Further developments of the invention are presented in the subclaims.

According to the invention, a telescopic part arrangement of elongated shape, for example, table leg, proposed, with a rohrfδrmigen outer part and a longitudinally adjustable inserted into the outer part and from this projecting inner part, wherein the inner part on its outer side a longitudinally extending keyway obliquely inwardly towards each other to wedge groove walls extending and the outer part engaging in the keyway wedge piece with the Keilnutwänden corresponding oblique Keilstückseiten and wherein the wedge piece by means of an arranged on the outer part actuator between an adjustability of the relative longitudinal position between the outer and inner part enabling release position and a by displacement of the wedge piece in the keyway into a clamping between the outer and inner part causing clamping position is adjustable. When tightening the wedge piece is thus pressed into the keyway, so that due to the wedge effect results in a jolt-free jamming or distortion between the outer and inner parts.

In a further development of the invention are wedge piece and

Keyway arranged to each other such that in the clamping position of the wedge piece, the wedge-piece sides are pressed with pressing force on the Keilnutwände. The wedge groove walls can thus be in direct contact with the wedge piece sides, so that the clamping force is generated by the pressing together of these two surface portions. Alternatively, it is possible that the wedge-piece sides are not pressed directly onto the wedge-groove walls, but the clamping takes place indirectly via an additional clamping component, which is then in turn pressed onto the wedge-groove walls by the wedge-piece sides.

It is possible to adjust the relative longitudinal position between the outer and inner part continuously or alternatively gradually. In order to enable a stepwise adjustment, the keyway may have a groove bottom with a row of holes in particular at the same distance from one another arranged plug holes, which are each associated with a specific relative longitudinal position or in the case of a table leg relative altitude between the outer and inner part. On the wedge piece can be in the Plug hole of the desired relative longitudinal position insertable bolt can be arranged.

In a further development of the invention, the actuating device has an actuating element which is adjustably mounted on a through hole formed on the outer part and connected to the wedge piece via coupling means. In a particularly preferred manner, an adjusting screw is provided as the actuating element. An internal thread for the set screw may be present at the through hole or alternatively at a sleeve fastened in the through hole. The actuator can be designed such that its operation is possible without tools by hand. On the actuating element, a tool attachment section can be provided, which allows engagement or engagement of a tool. This makes it possible that the actuating element can be actuated both by hand and if necessary to achieve even greater clamping forces by means of a tool.

In order to prevent cross-sectional changes caused by environmental influences, particularly the inner part, a game existing between the outer part and the inner part may be greater in transverse direction perpendicular to the longitudinal direction and at right angles to a transverse direction extending transversely to the longitudinal direction transverse direction. Particularly preferably, the inner part is formed as a solid body. However, it is also possible that the inner part is formed as a tubular member, in particular with integrally molded keyway.

The inner part may consist of wood or wood-like material, with a material direction of greatest swelling extent, wherein the material direction of greatest swelling extension in the width direction.

A preferred embodiment of the invention is illustrated in the drawing and will be explained in more detail below. In the drawing show:

FIG. 1 shows a telescopic part arrangement according to the present invention in a side view according to arrow I in FIG. 6, the inner part projecting from the outer part at the top being indicated only by dash-dotted lines,

FIG. 2 shows the arrangement according to FIG. 1 in an opposite side view according to arrow II in FIG. 6,

3 shows the inner part in a separate representation in the figure 2 corresponding side view, FIG. 4 shows the inner part according to FIG. 3 in a side view offset by 90 °,

5 shows a variant of the inner part in the figure 3 corresponding side view,

6 shows the telescopic part arrangement in cross section along the section line VI-VI in FIGS. 1 and 2, FIG.

FIG. 7 shows an enlarged view of the detail X from FIG. 6,

8 shows the telescopic part arrangement in a longitudinal section along the section line VIII-VIII in FIG. 1, FIG.

FIG. 9 an enlarged representation of a detail from FIG. 8, wherein an alternative different from FIG. 8 is shown,

Figure 10 shows a further variant in Figures 6 and 7 corresponding cross section and

Figure 11 shows the inner part of the variant of Figure 10 in a longitudinal section in partial view, wherein also the seated in the keyway wedge piece in side view located and indicated by the screwed screw outside screw is indicated.

From the drawing (Figure 1, 2), a telescopic subassembly 11 of elongate shape emerges, which can be used as a table leg, but is also suitable for other purposes. The telescopic part arrangement II has a tubular outer part 12 and an inner part 14 which is adjustably inserted into the outer part 12 in the longitudinal direction 13 and protrudes from the outer part 12 at the end. The length of the telescopic part arrangement 11 can be varied by inserting or withdrawing the inner part 14 from the tube-shaped outer part 12 and then fixing the adjusted length.

The inner part 14 has on its outer side a longitudinal direction 13 extending wedge groove 15 with obliquely inwardly toward each other to extending wedge walls 16, 17. The keyway 15 runs at the front in the insertion direction 18 into the outer part 12 front end 50 of the inner part 14 open from (see Fig. 3, 4, 5). As a result, a comfortable insertion into the outer 2o part 12 is possible. The inner part 14 is preferably made of plywood, especially veneer plywood 19, which is composed of several 90 ° cross-glued plywood layers or veneers (exemplified in the Fig. 3, 6 and 7). Wood has a direction of material greatest Quellausdehnung, that is, when moisture absorption, the wood fibers are thicker and the wood swells. By appropriate arrangement of the individual plywood layers of the veneer plywood 19 and their orientation within the outer part 12, a certain material direction greatest swelling expansion can be specified, which is perpendicular to the longitudinal direction 13 and perpendicular to a transverse to the longitudinal direction 13 transverse direction 20 extending width direction 21. In other words, the surface normal of the plane spanned by the groove base 22 of the keyway 15 and the surface normal of a respective plywood layer plane are perpendicular to each other.

FIG. 3 shows a variant in which a row of holes 23 of, in particular, equidistantly spaced plug-in holes 24 are arranged on the groove base 22, a respective plug-in hole 24 being associated with a specific relative longitudinal position between the outer and inner parts 12, 14. As a result, the relative longitudinal position between the outer and inner parts 12, 14 can be adjusted stepwise in the manner described in more detail below. As shown in Figure 4, the plug holes are formed as blind holes 24. FIG. 5 shows a further variant in which no plug-in holes are present on the groove base 22, so that here the relative longitudinal position between the outer and inner parts 12, 14 can be adjusted continuously. Particularly in the case of the stepless setting 5, the wedge-piece sides 26, 27 are provided with a serrated or sawtooth-like profiling in order to ensure a firm hold in the keyway 15. In the clamping position, this profiling digs into the material of the inner part 14, in particular wood.

In the variant resulting from FIG. 10, a stepless adjustment is likewise obtained. This will be explained later.

The outer part 12 has a wedge piece 25 engaging in the keyway 15 with the wedge groove walls 16, 17 correspondingly inclined wedge piece sides 26, 27. The outer part 12 is preferably made of metal. However, other materials may be used, such as plastic or the like. On the outside of the outer part 12 is an actuating device 28, by means of which the wedge piece 25 between

2o see a release position and a clamping position is adjustable. In the release position, a stepless or alternatively stepwise adjustment of the relative longitudinal position of the outer and inner parts 12, 14 is possible, while the wedge 25 in the Clamping position is shifted into the keyway 15, so that a deadlock between the outer and inner part 12, 14 takes place. The wedge piece sides 26, 27 are pressed onto the wedge groove walls 16, 17. This results in a wobble-free fit between the outer and inner parts 12, 14th

The actuating device 28 has an actuating element in the form of an adjusting screw 29 which has, for example, a knurled screw head 30 with a relatively large diameter (see FIGS. 6 and 8) and / or is designed as an internal polygonal screw (FIGS. 10 and 11) and integrally connected Screw shaft 31 with external thread 32 has. In the case of the thumbscrew, it is possible by the relatively large screw head diameter to operate the set screw 29 without tools by hand and still produce a sufficiently large clamping force for a jamming. Instead of the adjusting screw 29, the actuating device could also have, for example, an eccentric lever.

As shown by way of example in FIGS. 6 and 8, in the case of the screw head 30, a tool plant section, which is shown here by way of example as a longitudinal recess 60 in the form of a polygonal, in particular hexagonal hole, can additionally be provided, into which a Correspondingly trained polygonal, especially hex key is inserted. As a result, can not be generated by manual force large clamping forces can be generated. The external thread 32 on the screw shank 31 is adjustably mounted on a through hole 33 with internal thread 34 formed on the outer part 12. In order to achieve a wobble-free seat of the adjusting screw 29 in the through-hole 33, the through-hole 33 can project towards the outside of the outer part 12, with the internal thread 34 being extended. Alternatively, a sleeve with internal thread 34 can be inserted into the through hole 33 and connected to it, for example by means of a welded connection. FIGS. 9 and 10 show a further alternative in which a threaded sleeve 55 loosely in contact with the outer part 12 is used. In particular, for this purpose, the material of the outer part 12 is pressed at one point to the outside, so that a bulge 56 is formed, in which the head 57 of the threaded sleeve 55 is added. The depth of the bulge 56 corresponds approximately to the width of the head 57, so that it does not have over

2o the inside of the outer part 12 protrudes inward.

On the inner part 14 facing the end of the screw shaft 31 is a part of the coupling means for connecting the adjusting screw 29 with the wedge piece 25. It is here a nail-like projection 35 is provided, which has a neck portion 36 has, on the one hand integrally connected to the external thread 32 supporting part of the screw shank 31 and on the other hand integrally merges into a larger cross-section head portion 37.

On the wedge piece 25, which has a strip-shaped longitudinal shape, is the other part of the coupling means, namely a nail head-like projection 35 correspondingly formed receptacle 38, with a long base side of the trapezoidal cross-section shaped wedge piece 25 out, designed in plan view U-shaped Opening 39, whose cross section is slightly larger than the cross section of the neck portion 36 on the adjusting screw 30. The opening 39 then merges with the middle of the wedge piece 25 into a cross-sectionally larger undercut section 40 whose cross-section is somewhat larger than the cross-section of the head section 37 on the adjusting screw 29. The undercut part 40 is opened in the direction of one of the wedge-piece sides 26, 27. The adjusting screw 29 can therefore hook into the receptacle 38 only from one of the wedge-side pieces 26, 27, the head section 37 mounted in the undercut section 40 preventing the adjusting screw 29 from loosening in its screwing direction, ie, axially with respect to the screw axis 41 , At the wedge piece 25 is located, at the narrow, radially inwardly arranged base side, a particular integrally connected to the wedge piece 25 bolt 42 which is in the desired relative longitudinal position associated blind hole 24 in the keyway 15 can be inserted. This bolt is missing in the case of the variants according to Figures 5 and 10, 11, in which a continuous adjustment of the inner part 14 is possible.

Wedge pieces 25 of different wedge piece length can be used, so that, if required, jamming takes place over a shorter or longer region of the keyway 15. As mentioned, the inner part 14 consists of veneer plywood 19 with several plywood layers. The inner part 14 is now arranged in the outer part 12 such that the plane defined by the plywood layers plate plane is parallel to the screw or screw axis 41 of the screw 29. The material direction of greatest swelling extent thus extends substantially perpendicular to the screwing direction or to the screw axis 41, thus in the width direction 21 mentioned above. In order to prevent the inner part 14 from jamming with the outer part 12 as a result of swelling and therefore inner and outer part 12, 14 are no longer movable relative to each other is between the outer part 12 and the inner part 14 in the width direction 21 game available. This can be achieved in that the outer part 12 is not circular, but elliptical is formed, wherein the long ellipse axis extends in the width direction 21. It is also possible for the outer part 12 to be circular and the inner part 14 to be elliptical, with the long ellipse axis extending in the transverse direction 20.

To adjust the relative longitudinal position between the outer and inner parts 12, 14, in particular height adjustment in a table leg, the adjusting screw 29 is first released, so that the wedge piece 25 is displaced a little way in the direction of the keyway 15, wherein in the case of presence of the bolt 42 at the same time passes out of its associated blind hole 24 out. This state is shown in phantom in particular in FIG. Now, the inner part 14 can be moved relative to the outer part 12. In the new longitudinal position, the adjusting screw 29 is actuated and this screwed in the through hole 33 on the outer part 12 inwardly, the wedge piece 25 is taken over the already mentioned above coupling means nagelkopfartigem projection 35 and receptacle 38, so that the wedge piece 25 in the keyway 15th is shifted into it. In this case, the wedge-piece sides 26, 27 become wedged with the wedge-groove walls 16, 17 of the keyway 15 and are firmly clamped together. The wedge piece 15 is now in its clamping position. This state is apparent in particular from FIG. 7 (solid line) and FIG. The jamming causes a fixed th and wobble-free cohesion of the outer part 12 with the inner part 14 in both the transverse direction 20 and in the width direction 21st

In the variant according to FIGS. 10 and 11, the keyway 15 is not formed directly into the material of the inner part 14, as in the other embodiments, but is provided by a groove bar inserted into a longitudinal recess 60 of the inner part 19 extending in the longitudinal direction of the inner part 14 61 formed, which is suitably made of metal or plastic. The wedge groove walls 16, 17 are provided over the adjustment range of the inner part 14 with a serrated or sawtooth-like profiling, expediently in the form of a tooth row 62 extending in the longitudinal direction of the inner part 14 with radially directed teeth. The wedge-piece sides 26, 27 have a corresponding profiling, expediently also in the form of a longitudinally extending row of teeth 63, which cooperates in the clamping position of the wedge piece 25 with the profiling of the wedge groove walls 16, 17 and engages in this. The material of the groove strip 61 is selected such that the profiling of the wedge groove walls 16, 17 is permanently retained even after frequent adjustment of the inner part 14. The groove strip 61 may be divided in the longitudinal direction of the inner part 14 into successive Nutleistenabschnitte.

The groove strip 61 is defined in a suitable manner in the longitudinal recess 60, for example by firm impressions and / or gluing. Expediently, the longitudinal recess 60 has at least one plug-in recess 65 on its radially inwardly arranged base surface 64 and the groove strip 61 on its bottom surface 66 facing the base surface 64 at least one plug-in pin 67 inserted in the at least one plug-in recess 65.

Claims

claims

1. Telescopic part arrangement of elongated shape, for example table leg, with a tubular outer part (12) and a longitudinal direction (13) adjustable in the outer part (12) inserted and from this projecting inner part (14),

5 wherein the inner part (14) has on its outer side a wedge groove (15) extending in the longitudinal direction (13) with wedge-shaped walls (16, 17) running obliquely inwards towards one another and the outer part (12) engaging a wedge-shaped piece (15) ( 25) with the wedge groove walls (16, 17) correspondingly obliquely wedge piece sides (26, 27), and wherein the wedge piece (25) by means of an outer part (12) arranged actuating means (28) between a an adjustability of the relative longitudinal position between Outer and inner part (12, 14) enabling release position and by displacement i5 of the wedge piece (25) in the keyway (15) into a clamping between the outer and inner part (12, 14) causing clamping position is adjustable.

2. parts arrangement according to claim 1, characterized in that the wedge piece (25) and keyway (15) in such a ange-

20 are arranged that in the clamping position of the wedge piece (25) the wedge-piece sides (26, 27) are pressed with pressing force onto the wedge-groove walls (16, 17).

3. Part arrangement according to claim 1 or 2, characterized in that the keyway (15) has a groove bottom (22) with a

5 hole row (23) in particular at the same distance from each other arranged plug holes (24), each associated with a certain relative longitudinal position between the outer and inner part (12, 14), and the wedge piece (25) in the desired longitudinal relative position associated plug hole lo (24) insertable bolt (42) is arranged.

4. parts arrangement according to claim 3, characterized in that the plug holes are formed as blind holes (24).

5. Part arrangement according to claim 1 or 2, characterized in that the relative longitudinal position between the outer part (12) i5 and inner part (14) is infinitely adjustable.

6. parts arrangement according to one of the preceding claims, characterized in that the wedge piece (25) has a strip-shaped longitudinal shape.

7. parts arrangement according to one of the preceding claims,

20, characterized in that the wedge-piece sides (26, 27) of a iie particular rippled or sawtooth profiling have.

8. parts arrangement according to claim 7, characterized in that the keyway (15) of a in a Längsausnehmng (60)

5 of the inner part (14) inserted groove strip (61), in particular of metal or plastic, is formed and the Keilnutwände (16, 17) cooperating with the profiling of Keilstückseiten (26, 27) and in the clamping position with the profiling of Keilstückseiten ( 26, 27) engage in engagement, in particular ridge-like or sawtooth-like profiling.

9. parts arrangement according to claim 8, characterized in that the longitudinal recess (60) at its radially inner base surface (64) at least one plug recess (65) i5 and the groove strip (61) on its base surface (64) facing bottom side (66) Has at least one in the at least one plug-in recess (65) inserted plug-in pin (67).

10. Parts arrangement according to one of the preceding claims, 20 characterized in that the keyway (15) at least at

an end face (50) of the inner part (14) expires open.

11. Parts arrangement according to one of the preceding claims, characterized in that the actuating device (28) has an on an outer part (12) formed through hole (33) adjustably mounted actuating element (29),

5 which is connected via coupling means (35, 38) with the wedge piece (25).

12. Parts arrangement according to claim 11, characterized in that as a coupling means at the insertion end of the actuating element (29) provided, in particular nagelkopf- o like, projection (35) and a corresponding thereto on the wedge piece (25) formed receptacle (38) for hooking of the projection (35) are provided from one of the wedge-piece sides (26, 27).

13. parts arrangement according to claim 8 or 9, characterized in that the actuating element (29) is designed such that its operation is possible without tools by hand.

14. Parts arrangement according to one of claims Il to 13, characterized in that the actuating element as a screw o o (29) is formed, and at the through hole (33) or the one at the through hole (33) arranged sleeve or As an internal thread (34) is provided for the adjusting screw (29).

15. Sub-assembly according to claim 14, characterized in that the adjusting screw (29) as a thumbscrew and / or as

5 inner polygonal screw is formed.

16. Parts arrangement according to one of the preceding claims, characterized in that between the outer part (12) and the inner part (14) existing game in at right angles to the longitudinal direction (13) and perpendicular to a transverse to the longitudinal direction (13) extending transverse direction (20) standing widthwise direction (21) is greater than in the transverse direction (20).

17. Parts arrangement according to one of the preceding claims, characterized in that the inner part (14) is designed as a solid body.

18. Part arrangement according to one of the preceding claims, characterized in that the inner part (14) made of wood or wood-like material with a material direction largest swelling expansion and the material direction largest swelling extension in the width direction (21).

19. Parts arrangement according to claim 18, characterized in that the inner part (14) made of plywood, in particular veneer plywood (19).