EP0133524A2 - Lockable lifting device for the infinitely variable positioning of seats, table tops or similar articles, and lengthwise adjustable gas spring for such a lifting device - Google Patents

Lockable lifting device for the infinitely variable positioning of seats, table tops or similar articles, and lengthwise adjustable gas spring for such a lifting device Download PDF

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Publication number
EP0133524A2
EP0133524A2 EP84108990A EP84108990A EP0133524A2 EP 0133524 A2 EP0133524 A2 EP 0133524A2 EP 84108990 A EP84108990 A EP 84108990A EP 84108990 A EP84108990 A EP 84108990A EP 0133524 A2 EP0133524 A2 EP 0133524A2
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EP
European Patent Office
Prior art keywords
gas spring
housing
tube
lifting device
axially
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP84108990A
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German (de)
French (fr)
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EP0133524A3 (en
EP0133524B1 (en
Inventor
Hans Jürgen Bauer
Hans-Peter Bauer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fritz Bauer and Sohne OHG
Original Assignee
Fritz Bauer and Sohne OHG
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Publication date
Application filed by Fritz Bauer and Sohne OHG filed Critical Fritz Bauer and Sohne OHG
Priority to AT84108990T priority Critical patent/ATE30504T1/en
Publication of EP0133524A2 publication Critical patent/EP0133524A2/en
Publication of EP0133524A3 publication Critical patent/EP0133524A3/en
Application granted granted Critical
Publication of EP0133524B1 publication Critical patent/EP0133524B1/en
Expired legal-status Critical Current

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/20—Chairs or stools with vertically-adjustable seats
    • A47C3/30—Chairs or stools with vertically-adjustable seats with vertically-acting fluid cylinder

Definitions

  • the invention relates to a lockable lifting device according to the preamble of claim 1 and a length-adjustable gas spring for such a lifting device according to the preamble of claim 11.
  • the cylindrical outer surface of the housing of the gas spring is guided directly in a guide bush connected to the guide tube.
  • the gas spring is therefore not only a load-bearing and length-adjustable element, but also a guiding and rotating element. Since the piston rod in the base plate of the guide tube is not only freely rotatable but also fastened radially with sufficient play, the gas spring can align itself according to any changing load directions of the seat surface or table top, so that there is no risk of jamming. In addition, the seals surrounding the piston rod of the gas spring are not loaded on one side, so that the gas spring also does not leak and can therefore not function. The gas The spring is therefore softly supported laterally relative to the tubular column, so that no jamming between the piston rod and the cylinder on the one hand and between the cylinder and the tubular column on the other hand can occur.
  • Blockable lifting devices of this type have long proven themselves in practice on a large scale.
  • the housing of the gas spring is attached to the underside of the chair seat or the table top by means of a clamping device comprising a cylindrical upper section of the housing of the gas spring, as described, for example, in DE-PS 19 31 o12 (corresponding to US Pat. No. 3,711 o54) or is known from DE-OS 28 36 666 (corresponding to US Pat. No. 4,283,033). It is also known to provide a connection between the housing of the gas spring and the underside of the chair seat or the table top, the gas spring with a conical fastening section, which is inserted under pressure in a suitably designed hub on the underside of the chair seat or the table top becomes.
  • This configuration has the advantage that the connection between the chair seat or table top and the lifting device can be produced very easily, which is particularly advantageous for the dispatch of such furniture in disassembled condition and its subsequent assembly at the dealer or end user.
  • a conical configuration of the fastening section is known from DE-GM 7o 19 918 (corresponding to US-PS 3 79o 119).
  • the fastening section and the corresponding hub will eat due to the constant load, that is to say can practically no longer be detached from one another, and in particular cannot be detached without the aid of tools by means of which the surface of the housing of the gas spring which was displaceable with respect to the guide tube was damaged,
  • the invention is therefore based on the object of designing a lifting device of the generic type while maintaining all advantageous properties with little effort so that the gas spring can be detached from the chair seat or the table top in a simple manner.
  • an additional tube is made part of the housing of the gas spring, which can be connected in a simple manner to the chair seat or the table top by means of a particularly conical fastening section with the corresponding fastening element, for example a conical hub.
  • the actual gas spring which therefore only requires a simple cylindrical untreated housing on its outer surface, is then pulled out of the additional tube after the one fastening element on its underside is solved. Since the housing and the tube are connected radially to one another, the housing and the tube together contribute to the lateral strength, that is to say to the bending strength of the entire lifting device. This can be achieved in a particularly simple manner by the measures according to claim 2, which at the same time ensures that the lifting device can remain very slim.
  • the measures according to the invention likewise significantly increase the safety of the overall device.
  • the measures of claim 3 ensure that no punctiform pressures occur between the housing of the Sasfeder and the additional tube, these measures can be used at the same time according to claim 4 that a sliding body is held to actuate the actuating plunger.
  • a length-adjustable gas spring which can be used in a lockable lifting device according to the invention is protected in the embodiment according to the invention as an independent tradable good.
  • the blockable lifting device shown in the drawing for the stepless adjustment of seats or table tops has a lower guide tube 1, which is essentially cylindrical, but in its lower region has a downwardly conically tapering section 2, which is received in a corresponding hub 3 of a base frame 4 is used.
  • the guide tube 1 is provided in the vicinity of its lower end with a base plate 5 which has an opening 7 which is concentric with the central longitudinal axis 6 of the entire lifting device and thus also the guide tube 1.
  • a length-adjustable, hydraulically or pneumatically lockable gas spring 8 is provided, the cylindrical casing in the upper Be '-.
  • the free end of the piston rod 10 is formed with a reduced-diameter pin 11, on which an axial ball bearing 12 is arranged, the upper race 13 of which is supported against the collar 14 formed at the transition between the pin 11 and the piston rod 10, while the lower race 15 is supported against the base plate 5. Furthermore is mounted on the journal by a securing ring 16, of the thrust ball bearing 12 in the illustrated Stel - lung holds, even if the lower race 15 is not supported against the bottom plate. 5
  • the pin 11 passes through the opening 7 with a sufficient radial play of a few tenths to a millimeter, so that the piston rod 10 is not radially clamped relative to the guide tube 1.
  • a washer 17 is pushed onto the pin 11, the diameter of which is larger than the diameter of the opening 7.
  • a securing element 18 is pushed, so that the piston rod 10 of the gas spring 8 is axially fixed but detachable with the guide tube 1 is connected.
  • the continuous circular cylindrical housing 9 of the gas spring 8 is arranged in a tube 20 with a sliding fit, which is also circular cylindrical over its essential length, ie the radial play between the housing 9 and the tube 20 is a few hundredths to a maximum of 1 or 2 tenths of a millimeter.
  • the game is just such that the housing 9 of the gas spring 8 can be inserted into or pulled out of the tube 20, but at the same time the housing 9 is guided and held radially in the tube 20.
  • This tube 20 which forms a detachable part of the gas spring 8, is provided in its upper region, projecting beyond the housing 9, with a conically tapering fastening section 21, which is used to produce a fixed, easy-to-produce plug connection with a correspondingly designed hub 22, which is on the underside a chair, armchair, table top or the like is attached.
  • a sleeve 23 is arranged in the tube 20 in accordance with the taper of the tube 20, which sleeve is thus axially fixed in the direction of the fastening section 21.
  • the housing 9 of the gas spring 8taxial is firmly supported against this sleeve 23.
  • the housing 9 is held axially in the tube 20 by means of a releasable fastening element 24.
  • This can be a so-called claw, i.e. a ring provided with resilient projections, which can be inserted relatively easily into the tube 20 in one direction, that is to say, against the housing 9, but opposes an opposite movement in that he grips the pipe like a barb.
  • a sufficient effort for example by means of a screwdriver, it can be easily removed downwards, whereby the connection between the housing 9 and the tube 20 is broken in a simple manner.
  • fasteners including screw connections, can also be used.
  • This tube 20, which forms a detachable part of the gas spring 8, is mounted in the usual manner axially displaceably in the guide tube 1, for which purpose this is provided in its upper region with a guide bush 25 made of a suitable plastic.
  • the guide tube 1 and the tube 20 are made of steel.
  • the sleeve 23 consists of a softer material, for example die-cast zinc.
  • Length adjustments of the gas spring 8 and thus height adjustments of the entire lifting device are carried out by actuating a piston rod 10 facing away from the upper one th end protruding actuating plunger 26 of the gas spring 8, which is pressed into the housing 9 to enable the corresponding length adjustments.
  • an upwardly protruding sliding body 27 is arranged in the fastening section 21, which tapers conically upwards and bears with a contact surface 28 against the actuating plunger 26.
  • This sliding body 27 is further provided with retaining fingers 29 which engage resiliently behind a corresponding ring 30 on the sleeve 23, as a result of which the sliding body 27 is secured against the actuating plunger 26 against inadvertent falling out or pulling out of the fastening section 21 while at the same time largely free of play against the contact surface 28 is.
  • the actuation is carried out by means of a pivotable actuating lever, not shown, which is mounted in the hub 22 in the customary manner and which comes to bear against the outer surface 31 of the sliding body 27, as is known, for example, from DE-GM 70 19 918 (corresponding to US Pat. No. 3,790 119) is known.
  • annular collar 32 formed, on which the designed as an elastic clamping ring mounting member 24 is pushed. Subsequently, this collar 32 is flanged to the outside, so that this fastening element 24 is connected to the gas spring 8 so that it cannot move.
  • the assembly of the gas spring 8 in the tube 20 is facilitated to the extent that after inserting the gas spring 8 into the tube 20 only with a soft hammer, such as a rubber hammer or the like. must be struck on the pin 11 of the piston rod 10 in order to fully drive the cylindrical housing 9 of the gas spring 8 into the tube 20 and to bring the fastening element 24 into the locking position shown in the drawing.
  • the fastening element 24 can also be open on one side and pushed transversely under the collar 32. Such a configuration would make it easier to replace the fastening element 24 after the gas spring 8 has been removed from the tube 20.
  • the tube 20 can also have a non-circular cross-section, in particular thus be of polygonal design. In such a case, it should have at least a triangular cross section, expedient configurations having a hexagonal or octagonal cross section. In such a case, the guide bushing 25 should have a correspondingly adapted cross section. If in this way the tube 20 together with the gas spring 8 were made non-rotatable relative to the guide tube 1, the axial ball bearing 12 could of course also be omitted.
  • FIGS. 3 and 4 A further embodiment is shown in FIGS. 3 and 4, FIG. 3 showing some details of the gas spring 8 used.
  • This is - in the same way as in the embodiments according to FIGS. 1 and 2 - basically constructed as it is shown and described in DE-PS 18 12 282 (corresponding to US-PS 3,656,593).
  • a sealing and guide bushing 33 At its piston rod outlet end 10, it has a sealing and guide bushing 33, which can be made in one piece or - as in the present case - in two parts.
  • a multi-lip seal 34 abutting against the piston rod 10 is arranged, which abuts against the piston rod 10.
  • a sealing ring 35 is arranged in it, which bears against the cylindrical housing 9 of the gas spring 8, so that a gas-tight closure is provided here.
  • the cylindrical housing 9 of the gas spring 8 has an edge 36 flanged over this sleeve 33.
  • the sleeve 33 has a sleeve-like section 37 which projects outward from the housing 9 and surrounds the piston rod 10.
  • This sleeve-like section 37 in turn has an undercut 38 adjacent to the edge 36.
  • a so-called claw is arranged as a fastening element 24, which is formed from a ring 39 with resilient projections 40 projecting outwards.
  • This fastener 24 is made of spring steel.
  • the projections 40 are inclined outwards against the direction of insertion 41, so that they can cling to the inside wall of the tube 20 like barbs against the direction of insertion 41.
  • the ring 39 is held axially on the sleeve-like section 37 by a locking ring designed as a toothed ring 42, the resilient teeth 43 of which protrude radially inwards are held in the undercut 38 and are secured.
  • the fastening element 24 can thus be mounted and held axially by simply sliding it on and then sliding the toothed ring 42 onto the sleeve-like section 37.
  • the sleeve-like section has - as can be seen in FIG. 3 - two diametrically opposed, mutually parallel flat surfaces 44 which extend to the edge 36 and whose distance corresponds to a standard distance for an open-end wrench.
  • the ring 39 of the fastening element 24 is provided with two associated contact surfaces 45, so that the fastening element 24 is attached in a rotationally fixed manner on the sleeve-like section 37.
  • the sealing and guide bushing 33 with the section 37 is of course fixed in the gas spring 8 in a rotationally fixed manner.
  • a groove 47 (multiple times with an incline) (that is, a thread-like incision) is formed.
  • the resilient projections 40 of the fastening element 24 can yield due to their already mentioned inclination until they engage in the area of the groove to which the final axially fixed position of the gas spring 8 in the tube 20 corresponds. A purely axial loosening of the fastening element 24 and thus pulling the gas spring 8 out of the tube 20 is practically impossible.
  • the gas spring 8 By rotating the gas spring 8 relative to the tube 20 by means of a wrench which engages the surfaces 44 of the sleeve-like section 37., directly outside the tube 20, the gas spring 8 can be removed from the tube due to the engagement of the resilient projections 40 in the groove 47 20 are unscrewed.

Landscapes

  • Chairs Characterized By Structure (AREA)
  • Tables And Desks Characterized By Structural Shape (AREA)
  • Fluid-Damping Devices (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Paper (AREA)
  • Special Conveying (AREA)
  • Special Chairs (AREA)

Abstract

1. Lockable lifting device for the infinitely variable adjustment of chair seats, table tops or similar furniture parts, with a guide tube (1) which can be connected to a base frame (4), and with an adjustable-length gas spring (8), the piston rod (10) of which is connected in axially rigid but separable fashion to a bottom plate (5) of a guide tube (1), the housing (9) of which can be connected in axially rigid but separable fashion by an upper fixing portion (21) which has a corresponding hub (22), to the chair seat or table top and the housing (9) of which is guided in the guide tube (1) in laterally rigid but axially displaceable manner, and out of the housing (9) of which an actuating rod (26) for length-adjustment of the gas spring (8) projects upwardly into the fixing portion (21), characterized in that the housing (9) of the gas spring (8) is disposed radially rigidly in an additional tube (20) which forms a constituent part of the gas spring (8) and on which the fixing portion (21) is constructed, one end of the housing (9) bearing axially against an abutment in the region of the fixing portion (21), the other end of the housing (9) bearing against a fixing element (24) connected separably to the tube (20).

Description

Die Erfindung betrifft eine blockierbare Hubvorrichtung nach dem Oberbegriff des Anspruches 1 und eine längenverstellbare Gasfeder für eine solche Hubvorrichtung nach dem Oberbegriff des Anspruches 11.The invention relates to a lockable lifting device according to the preamble of claim 1 and a length-adjustable gas spring for such a lifting device according to the preamble of claim 11.

Bei einer derartigen aus der DE-PS 19 31 012 (entsprechend US-PS 3 711 054) bekannten Hubvorrichtung wird die insoweit zylindrische Außenfläche des Gehäuses der Gasfeder unmittelbar in einer mit dem Führungsrohr verbundenen Führungsbüchse geführt. Die Gasfeder ist also nicht nur tragendes und längenverstellbares, sondern auch führendes und drehbares Element. Da die Kolbenstange in der Bodenplatte des Führungsrohres nicht nur frei drehbar sondern auch radial mit einem ausreichenden Spiel befestigt ist, kann sich die Gasfeder entsprechend etwaigen wechselnden Belastungsrichtungen der Sitzfläche bzw. Tischplatte ausrichten, so daß nicht die Gefahr eines Verklemmens besteht. Außerdem werden hierdurch die die Kolbenstange der Gasfeder umfassenden Dichtungen nicht einseitig belastet, so daß die Gasfeder auch nicht undicht und damit funktionsunfähig werden kann. Die Gasfeder ist also gegenüber der rohrartigen Säule seitlich weich gelagert, so daß keine Verklemmungen zwischen Kolbenstange und Zylinder einerseits und zwischen Zylinder und rohrartiger Säule andererseits auftreten können.In such a lifting device known from DE-PS 19 31 012 (corresponding to US Pat. No. 3,711,054), the cylindrical outer surface of the housing of the gas spring is guided directly in a guide bush connected to the guide tube. The gas spring is therefore not only a load-bearing and length-adjustable element, but also a guiding and rotating element. Since the piston rod in the base plate of the guide tube is not only freely rotatable but also fastened radially with sufficient play, the gas spring can align itself according to any changing load directions of the seat surface or table top, so that there is no risk of jamming. In addition, the seals surrounding the piston rod of the gas spring are not loaded on one side, so that the gas spring also does not leak and can therefore not function. The gas The spring is therefore softly supported laterally relative to the tubular column, so that no jamming between the piston rod and the cylinder on the one hand and between the cylinder and the tubular column on the other hand can occur.

Derartige blockierbare Hubvorrichtungen haben sich seit langem in großem Umfang in der Praxis bewährt.Blockable lifting devices of this type have long proven themselves in practice on a large scale.

Die Befestigung des Gehäuses der Gasfeder an der Unterseite des Stuhlsitzes oder der Tischplatte erfolgt hierbei mittels einer einen zylindrischen oberen Abschnitt des Gehäuses der Gasfeder umfassenden Klemmvorrichtung, wie sie beispielsweise aus der DE-PS 19 31 o12 (entsprechend US-PS 3 711 o54) oder aus der DE-OS 28 36 666 (entsprechend US-PS 4 283 o33) bekannt ist. Es ist weiterhin bekannt, zur Herstellung einer Verbindung zwischen dem Gehäuse der Gasfeder und der Unterseite des Stuhlsitzes bzw. der Tischplatte die Gasfeder mit einem konischen Befestigungsabschnitt zu versehen, der unter Druck in eine entsprechend ausgebildete Nabe an der Unterseite des Stuhlsitzes bzw. der Tischplatte eingesetzt wird. Diese Ausgestaltung hat den Vorteil, daß die Verbindung zwischen Stuhlsitz bzw. Tischplatte und Hubvorrichtung sehr einfach herstellbar ist, was insbesondere für den Versand solcher Möbel in zerlegtem Zustand und deren anschließenden Zusammenbau beim Händler oder Endanwender von Vorteil ist. Eine solche konische Ausgestaltung des Befestigungsabschnittes ist aus dem DE-GM 7o 19 918 (entsprechend US-PS 3 79o 119) bekannt. Insbesondere bei solchen konischen Steckverbindungen besteht die Gefahr, daß der Befestigungsabschnitt und die entsprechende Nabe aufgrund der ständigen Belastung fressen, also praktisch nicht mehr voneinander lösbar sind, und zwar insbesondere nicht ohne Zuhilfenahme von Werkzeugen lösbar sind, mittels derer die gegenüber dem Führungsrohr verschiebbare Oberfläche des Gehäuses der Gasfeder bescha= digt wurde,The housing of the gas spring is attached to the underside of the chair seat or the table top by means of a clamping device comprising a cylindrical upper section of the housing of the gas spring, as described, for example, in DE-PS 19 31 o12 (corresponding to US Pat. No. 3,711 o54) or is known from DE-OS 28 36 666 (corresponding to US Pat. No. 4,283,033). It is also known to provide a connection between the housing of the gas spring and the underside of the chair seat or the table top, the gas spring with a conical fastening section, which is inserted under pressure in a suitably designed hub on the underside of the chair seat or the table top becomes. This configuration has the advantage that the connection between the chair seat or table top and the lifting device can be produced very easily, which is particularly advantageous for the dispatch of such furniture in disassembled condition and its subsequent assembly at the dealer or end user. Such a conical configuration of the fastening section is known from DE-GM 7o 19 918 (corresponding to US-PS 3 79o 119). In particular in the case of such conical plug-in connections, there is a risk that the fastening section and the corresponding hub will eat due to the constant load, that is to say can practically no longer be detached from one another, and in particular cannot be detached without the aid of tools by means of which the surface of the housing of the gas spring which was displaceable with respect to the guide tube was damaged,

Der Erfindung liegt daher die Aufgabe zugrunde, eine Hubvorrichtung der gattungsgemäßen Art unter Beibehaltung aller vorteilhaften Eigenschaften mit geringem Aufwand so auszugestalten, daß die Gasfeder in einfacher Weise vom Stuhlsitz bzw. der Tischplatte gelöst werden kann.The invention is therefore based on the object of designing a lifting device of the generic type while maintaining all advantageous properties with little effort so that the gas spring can be detached from the chair seat or the table top in a simple manner.

Diese Aufgabe wird erfindungsgemäß durch Merkmale des Kennzeichnungsteiles des Anspruches 1 gelöst. Der Kern der Erfindung liegt darin, daß ein zusätzliches Rohr zum Bestandteil des Gehäuses der Gasfeder gemacht wird, das mittels eines insbesondere konischen Befestigungsabschnitts mit dem entsprechenden Befestigungselement, beispielsweise also einer konischen Nabe, in einfacher Weise mit dem Stuhlsitz oder der Tischplatte verbindbar ist. Für Servicezwecke, bei denen die Gasfeder ja auch von der Bodenplatte des Führungsrohres gelöst werden muß, wird dann die eigentliche Gasfeder, die also nur ein einfaches zylindrisches an seiner Außenfläche unbehandeltes Gehäuse benötigt, aus dem zusätzlichen Rohr herausgezogen, nachdem das eine Befestigungselement an dessen Unterseite gelöst ist. Da das Gehäuse und das Rohr radial fest miteinander verbunden sind, tragen das Gehäuse und das Rohr gemeinsam zur Seitenfestigkeit, also zur Biegefestigkeit der gesamten Hubvorrichtung bei. In besonders einfacher Weise läßt sich dies durch die Maßnahmen nach Anspruch 2 realisieren, wodurch gleichzeitig sichergestellt wird, daß die Hubvorrichtung sehr schlank bleiben kann. Durch die erfindungsgemäßen Maßnahmen wird gleichermaßen die Sicherheit der Gesamtvorrichtung erheblich erhöht.This object is achieved by features of the characterizing part of claim 1. The essence of the invention is that an additional tube is made part of the housing of the gas spring, which can be connected in a simple manner to the chair seat or the table top by means of a particularly conical fastening section with the corresponding fastening element, for example a conical hub. For service purposes, in which the gas spring must also be detached from the base plate of the guide tube, the actual gas spring, which therefore only requires a simple cylindrical untreated housing on its outer surface, is then pulled out of the additional tube after the one fastening element on its underside is solved. Since the housing and the tube are connected radially to one another, the housing and the tube together contribute to the lateral strength, that is to say to the bending strength of the entire lifting device. This can be achieved in a particularly simple manner by the measures according to claim 2, which at the same time ensures that the lifting device can remain very slim. The measures according to the invention likewise significantly increase the safety of the overall device.

Durch die Maßnahmen nach Anspruch 3 wird erreicht, daß keine punktförmigen Pressungen zwischen dem Gehäuse der Sasfeder und dem zusätzlichen Rohr auftreten, wobei diese Maßnahmen gleichzeitig entsprechend Anspruch 4 dazu weiterverwendet werden können, daß ein Schiebekörper zur Betätigung des Betätigungsstößels gehalten wird.The measures of claim 3 ensure that no punctiform pressures occur between the housing of the Sasfeder and the additional tube, these measures can be used at the same time according to claim 4 that a sliding body is held to actuate the actuating plunger.

Die lösbare Verbindung zwischen dem zusätzlichen Rohr und der Gasfeder wird in einfachster Weise durch die Maßnahmen nach Anspruch 5 realisiert.The detachable connection between the additional tube and the gas spring is realized in the simplest way by the measures according to claim 5.

Insbesondere die Ausgestaltungen nach den Ansprüchen 6 bis 10 geben eine ganz besonders vorteilhafte und praxisfreundliche Ausgestaltung wieder.In particular, the configurations according to claims 6 to 10 reflect a very particularly advantageous and practical configuration.

Im Anspruch 11 wird eine in einer erfindungsgemäßen blockierbaren Hubvorrichtung einsetzbare längenverstellbare Gasfeder in der erfindungsgemäßen Ausgestaltung als selbständiges handelsfähiges Gut unter Schutz gestellt.In claim 11, a length-adjustable gas spring which can be used in a lockable lifting device according to the invention is protected in the embodiment according to the invention as an independent tradable good.

Aus dem DE-GM 19 61 656 ist zwar eireblockierbare Hubvorrichtung zum stufenlosen Verstellen von Stuhlsitzen od.dgl. bekannt, die aus zwei teleskopartig ineinandergeführten Rohren besteht, wobei das untere Führungsrohr mit einem Fußgestell verbunden ist, während das obere in dem Führungsrohr geführte Rohr unlösbar mit einer unter dem Sitz angeordneten Tragplatte verbunden ist. In dieser teleskopartigen Säule ist eine längenverstellbare Gasfeder angeordnet, deren oberes Ende mit der erwähnten Platte verschraubt ist. Ihre Kolbenstange ist mit einer Bodenplatte des Führungsrohres verschraubt. Diese Ausgestaltung war zu der gattungsgemäßen Hubvorrichtung nach der DE-PS 19 31 012 weiterentwickelt worden. Da bei ihr nicht ein Befestigungsabschnitt der Gasfeder selber in der gattungsgemäß vorausgesetzten Weise mit dem Stuhlsitz od.dgl. verbindbar ist, konnte diese bekannte Ausführung keine Anregung im Hinblick auf die erfindungsgemäße Lösung geben.From DE-GM 19 61 656 eireblockbaren lifting device for stepless adjustment of chair seats or the like. known, which consists of two telescopically guided tubes, the lower guide tube is connected to a base, while the upper tube guided in the guide tube is inextricably linked to a support plate arranged under the seat. In this telescopic column a length-adjustable gas spring is arranged, the upper end of which is screwed to the plate mentioned. Your piston rod is screwed to a bottom plate of the guide tube. This configuration had been further developed to the generic lifting device according to DE-PS 19 31 012. Since there is not a fastening section of the gas spring itself or the like in the generic manner with the chair seat. can be connected, this known embodiment could not provide any suggestions with regard to the solution according to the invention.

Weitere Vorteile und Merkmale der Erfindung ergeben sich aus der nachfolgenden Beschreibung von Ausführungsbeispielen anhand der Zeichnung. Es zeigt

  • Fig. 1 eine erfindungsgemäße Hubvorrichtung teilweise im Längsschnitt,
  • Fig. 2 einen Teilausschnitt einer abgewandelten Ausführungsform,
  • Fig. 3 einen Teilausschnitt einer weiteren abgewandelten Ausführungsform und
  • Fig. 4 eine Ansicht gemäß dem Pfeil III in Fig. 3.
Further advantages and features of the invention result from the following description of exemplary embodiments with reference to the drawing. It shows
  • 1 is a lifting device according to the invention partially in longitudinal section,
  • 2 shows a partial section of a modified embodiment,
  • Fig. 3 shows a partial section of a further modified embodiment and
  • 4 shows a view according to arrow III in FIG. 3.

Die in der Zeichnung dargestellte blockierbare Hubvorrichtung zum stufenlosen Verstellen von Sitzen oder Tischplatten weist ein unteres Führungsrohr 1 auf, das im wesentlichen zylindrisch ausgebildet ist, in seinem unteren Bereich aber einen sich nach unten konisch verjüngenden Abschnitt 2 aufweist, der zur Aufnahme in einer entsprechenden Nabe 3 eines Fußgestells 4 dient. Das Führungsrohr 1 ist in der Nähe seines unteren Endes mit einer Bodenplatte 5 versehen, die eine zur Mittel-Längsachse 6 der ge - samten Hubvorrichtung und damit auch des Führungsrohres 1 konzentrische öffnung 7 aufweist. Ebenfalls achsparallel mit der Längsachse 6 ist eine längenverstellbare, hydraulisch oder pneumatisch blockierbare Gasfeder 8 vorgesehen, deren zylindrisches Gehäuse sich im oberen Be'- . reich des Führungsrohres 1 und aus diesem nach oben hinausragend befindet, während ihre Kolbenstange 10 nach unten aus dem Gehäuse 9 herausragt und mit der Bodenplatte 5 lösbar verbunden ist. Hierzu ist das freie Ende der Kolbenstange 10 mit einem im Durchmesser reduzierten Zapfen 11 ausgebildet, auf dem ein Axial-Kugel-Lager 12 angeordnet ist, dessen oberer Laufring 13 sich gegen den am Übergang zwischen Zapfen 11 und Kolbenstange 10 ausgebildeten Ringbund 14 abstützt, während der untere Laufring 15 sich gegen die Bodenplatte 5 abstützt. Außerdem ist auf dem Zapfen ein Sicherungsring 16 angebracht, der das Axial-Kugel-Lager 12 in der dargestellten Stel- lung hält, auch wenn der untere Laufring 15 sich nicht gegen die Bodenplatte 5 abstützt.The blockable lifting device shown in the drawing for the stepless adjustment of seats or table tops has a lower guide tube 1, which is essentially cylindrical, but in its lower region has a downwardly conically tapering section 2, which is received in a corresponding hub 3 of a base frame 4 is used. The guide tube 1 is provided in the vicinity of its lower end with a base plate 5 which has an opening 7 which is concentric with the central longitudinal axis 6 of the entire lifting device and thus also the guide tube 1. Likewise axially parallel with the longitudinal axis 6 of a length-adjustable, hydraulically or pneumatically lockable gas spring 8 is provided, the cylindrical casing in the upper Be '-. rich of the guide tube 1 and protruding upwards from this, while its piston rod 10 protrudes downward from the housing 9 and is detachably connected to the base plate 5. For this purpose, the free end of the piston rod 10 is formed with a reduced-diameter pin 11, on which an axial ball bearing 12 is arranged, the upper race 13 of which is supported against the collar 14 formed at the transition between the pin 11 and the piston rod 10, while the lower race 15 is supported against the base plate 5. Furthermore is mounted on the journal by a securing ring 16, of the thrust ball bearing 12 in the illustrated Stel - lung holds, even if the lower race 15 is not supported against the bottom plate. 5

Der Zapfen 11 durchsetzt die Öffnung 7 mit einem ausreichenden radialen Spiel von einigen Zehnteln bis zu einem Millimeter,so daß die Kolbenstange 10 gegenüber dem Führungrohr 1 nicht radial verspannt wird. Von außen, also unten, ist auf den Zapfen 11 eine Beilagscheibe 17 aufgeschoben, deren Durchmesser größer ist als der Durchmesser der öffnung 7. Hiergegen ist wiederum ein Sicherungselement 18 geschoben, so daß die Kolbenstange 10 der Gasfeder 8 axial fest aber lösbar mit dem Führungsrohr 1 verbunden ist. Auf der Kolbenstange 10 befindet sich ein etwa ringzylindrischer Endlagen- oder Anschlag-Dämpfer 19 aus Gummi, der mit seiner Unterseite gegen den oberen Laufring 13 des Axial-Kugel-Lagers 12 anliegt.The pin 11 passes through the opening 7 with a sufficient radial play of a few tenths to a millimeter, so that the piston rod 10 is not radially clamped relative to the guide tube 1. From the outside, i.e. below, a washer 17 is pushed onto the pin 11, the diameter of which is larger than the diameter of the opening 7. Against this, a securing element 18 is pushed, so that the piston rod 10 of the gas spring 8 is axially fixed but detachable with the guide tube 1 is connected. On the piston rod 10 there is an approximately ring-cylindrical end position or stop damper 19 made of rubber, which rests with its underside against the upper race 13 of the axial ball bearing 12.

Das durchgehend kreiszylindrische Gehäuse 9 der Gasfeder 8 ist in einem über seine wesentliche Länge ebenfalls kreiszylindrischen Rohr 20 mit Schiebesitz angeordnet, d. h. das radiale Spiel zwischen dem Gehäuse 9 und dem Rohr 20 beträgt einige Hundertstel bis maximal 1 oder 2 Zehntel Millimeter. Das Spiel ist also gerade so, daß das Gehäuse 9 der Gasfeder 8 in das Rohr 20 eingeschoben bzw. aus diesem herausgezogen werden kann, wobei gleichzeitig aber das Gehäuse 9 in dem Rohr 20 radial geführt und gehalten ist. Dieses einen lösbaren Teil der Gasfeder 8 bildende Rohr 20 ist in seinem oberen, das Gehäuse 9 überragenden Bereich mit einem sich konisch verjüngenden Befestigungsabschnitt 21 versehen, der zur-Herstellung einer festen einfach herzustellenden Steckverbindung mit einer entsprechend ausgebildeten Nabe 22 dient, die an der Unterseite eines Stuhles, Sessels, einer Tischplatte od. dgl. befestigt ist. Am Übergang zu dem Befestigungsabschnitt 21 ist im Rohr 20 eine entsprechend der Verjüngung des Rohres 20 ausgebildete Hülse 23 angeordnet, die also in Richtung auf den Befestigungsabschnitt 21 axial festliegt. Gegen diese Hülse 23 stützt sich das Gehäuse 9 der Gasfeder 8taxial fest ab.The continuous circular cylindrical housing 9 of the gas spring 8 is arranged in a tube 20 with a sliding fit, which is also circular cylindrical over its essential length, ie the radial play between the housing 9 and the tube 20 is a few hundredths to a maximum of 1 or 2 tenths of a millimeter. The game is just such that the housing 9 of the gas spring 8 can be inserted into or pulled out of the tube 20, but at the same time the housing 9 is guided and held radially in the tube 20. This tube 20, which forms a detachable part of the gas spring 8, is provided in its upper region, projecting beyond the housing 9, with a conically tapering fastening section 21, which is used to produce a fixed, easy-to-produce plug connection with a correspondingly designed hub 22, which is on the underside a chair, armchair, table top or the like is attached. At the transition to the fastening section 21, a sleeve 23 is arranged in the tube 20 in accordance with the taper of the tube 20, which sleeve is thus axially fixed in the direction of the fastening section 21. The housing 9 of the gas spring 8taxial is firmly supported against this sleeve 23.

Von der anderen Seite her, also vom unteren freien Ende des Rohres 20 her,ist das Gehäuse 9 in dem Rohr 20 axial mittels eines lösbaren Befestigungselementes 24 festgehalten. Hierbei kann es sich um eine sogenannte Kralle handeln, also einen mit federnden Vorsprüngen versehenen Ring, der sich in einer Richtung, also bis zur Anlage gegen das Gehäuse 9 relativ leicht in das Rohr 20 einschieben läßt, sich aber einer entgegengesetzten Bewegung dadurch widersetzt, daß er sich widerhakenartig in dem Rohr verklammert. Mit einem ausreichenden Kraftaufwand, beispielsweise mittels eines Schraubendrehers, ist er aber ohne weiteres nach unten herausnehmbar, wodurch in einfacher Weise die Verbindung zwischen dem Gehäuse 9 und dem Rohr 20 aufgehoben wird. Naturgemäß kommen auch viel andere Arten von Befestigungselementen einschließlich Schraubverbindungen in Betracht.From the other side, that is, from the lower free end of the tube 20, the housing 9 is held axially in the tube 20 by means of a releasable fastening element 24. This can be a so-called claw, i.e. a ring provided with resilient projections, which can be inserted relatively easily into the tube 20 in one direction, that is to say, against the housing 9, but opposes an opposite movement in that he grips the pipe like a barb. With a sufficient effort, for example by means of a screwdriver, it can be easily removed downwards, whereby the connection between the housing 9 and the tube 20 is broken in a simple manner. Naturally, many other types of fasteners, including screw connections, can also be used.

Dieses einen lösbaren Teil der Gasfeder 8 bildende Rohr 20 ist in üblicher Weise axial verschiebbar in dem Führungsrohr 1 gelagert, wozu dieses in seinem oberen Bereich mit einer Führungsbüchse 25 aus einem geeigneten Kunststoff versehen ist. Demgegenüber bestehen das Führungsrohr 1 und das Rohr 20 aus Stahl. Gleiches gilt für das Gehäuse 9 der Gasfeder 8, wogegen die Hülse 23 aus einem weicheren Material, beispielsweise Zinkdruckguß, besteht.This tube 20, which forms a detachable part of the gas spring 8, is mounted in the usual manner axially displaceably in the guide tube 1, for which purpose this is provided in its upper region with a guide bush 25 made of a suitable plastic. In contrast, the guide tube 1 and the tube 20 are made of steel. The same applies to the housing 9 of the gas spring 8, whereas the sleeve 23 consists of a softer material, for example die-cast zinc.

Längenverstellungen der Gasfeder 8 und damit Höhenverstellungen der gesamten Hubvorrichtung erfolgen durch Betätigung eines aus dem oberen, der Kolbenstange 10 abgewandten Ende herausragenden Betätigungsstößel 26 der Gasfeder 8, der zur Ermöglichung der entsprechenden Längenverstellungen in das Gehäuse 9 hineingedrückt wird. Hierzu ist in dem sich konisch nach oben verjüngenden Befestigungsabschnitt 21 ein nach oben aus letzterem herausragender Schiebekörper 27 angeordnet, der mit einer Anlagefläche 28 gegen den Betätigungsstößel 26 anliegt. Dieser Schiebekörper 27 ist weiterhin mit Haltefingern 29 versehen, die federnd hinter einen entsprechenden Ring 30 an der Hülse 23 greifen, wodurch der Schiebekörper 27 gegen ein unbeabsichtigtes Herausfallen oder Herausziehen aus dem Befestigungsabschnitt 21 unter gleichzeitiger weitgehend spielfreier Anlage der Anlagefläche 28 gegen den Betätigungsstößel 26 gesichert ist. Die Betätigung erfolgt mittels eines nicht dargestellt, in der Nabe 22 in.üblicher Weise gelagerten schwenkbaren Betätigungshebels, der gegen die Außenfläche 31 des Schiebekörpers 27 zur Anlage kommt, wie es beispielsweise aus dem DE-GM 70 19 918 (entsprechend US-PS 3 790 119) bekannt ist.Length adjustments of the gas spring 8 and thus height adjustments of the entire lifting device are carried out by actuating a piston rod 10 facing away from the upper one th end protruding actuating plunger 26 of the gas spring 8, which is pressed into the housing 9 to enable the corresponding length adjustments. For this purpose, an upwardly protruding sliding body 27 is arranged in the fastening section 21, which tapers conically upwards and bears with a contact surface 28 against the actuating plunger 26. This sliding body 27 is further provided with retaining fingers 29 which engage resiliently behind a corresponding ring 30 on the sleeve 23, as a result of which the sliding body 27 is secured against the actuating plunger 26 against inadvertent falling out or pulling out of the fastening section 21 while at the same time largely free of play against the contact surface 28 is. The actuation is carried out by means of a pivotable actuating lever, not shown, which is mounted in the hub 22 in the customary manner and which comes to bear against the outer surface 31 of the sliding body 27, as is known, for example, from DE-GM 70 19 918 (corresponding to US Pat. No. 3,790 119) is known.

Zum Auswechseln der Gasfeder 8 muß nur das untere Sicherungselement 18 gelöst werden. Anschließend kann der Stuhlsitz, die Tischplatte od.dgl. samt Rohr 20 und Gasfeder 8 aus dem Führungsrohr 1 herausgezogen werden. Nach dem geschilderten Lösen des Befestigungselementes 24 kann dann die eigentliche Gasfeder 8 aus dem Rohr 20 herausgezogen werden. Die Verbindung zwischen dem Rohr 20 und der Nabe 22, also dem Befestigungselement an dem Stuhl oder der Tischplatte braucht nicht gelöst zu werden. Die Hülse 23 wird sich unter der Belastung so verformt haben, daß sie ausreichend fest im Rohr 20 sitzt, also zumindest bei dem Auseinanderbau und dem anschließenden Wiederzusammenbau nicht herausfällt. Zum Einschieben des Betätigungsstößels 26 in das Gehäuse 9 können die Haltefinger 29 des Schiebekörpers 27 selbstverständlich an der Innenfläche der Hülse 23 frei entlanggleiten.To replace the gas spring 8, only the lower securing element 18 has to be released. Then the chair seat, the table top or the like. together with tube 20 and gas spring 8 are pulled out of the guide tube 1. After the described loosening of the fastening element 24, the actual gas spring 8 can then be pulled out of the tube 20. The connection between the tube 20 and the hub 22, that is to say the fastening element on the chair or the table top, need not be released. The sleeve 23 will have deformed under the load in such a way that it is seated sufficiently firmly in the tube 20, that is to say, at least during the disassembly and the subsequent reassembly, does not fall out. To insert the actuating plunger 26 into the housing 9, the holding fingers 29 of the sliding body 27 can of course slide freely along the inner surface of the sleeve 23.

Bei der abgewandelten Ausführungsform nach Fig. 2 ist am kolbenstangenaustrittsseitigen Ende der Gasfeder, und zwar bevorzugt an dem dort üblicherweise vorhandenen Führungs- und Dichtungsstopfen ein Ringbund 32 ausgebildet, über den das als elastischer Klemmring ausgebildete Befestigungselement 24 geschoben wird. Anschließend wird dieser Ringbund 32 nach außen umgebördelt, so daß dieses Befestigungselement 24 axial zur Gasfeder 8 unverschiebbar mit dieser verbunden ist. Die Montage der Gasfeder 8 in dem Rohr 20 wird hierbei insoweit erleichtert, als nach dem Einschieben der Gasfeder 8 in das Rohr 20 nur mit einem weichen Hammer, wie einem Gummihammer od.dgl. auf den Zapfen 11 der Kolbenstange 10 geschlagen werden muß, um das zylindrische Gehäuse 9 der Gasfeder 8 vollständig in das Rohr 20 einzutreiben und das Befestigungselement 24 in die in der Zeichnung dargestellte Verriegelungsstellung zu bringen.In the modified embodiment of FIG. 2 on the piston-rod-outlet-side end of the gas spring, and indeed preferably at the there usually existing F ührungs- and sealing plug an annular collar 32 formed, on which the designed as an elastic clamping ring mounting member 24 is pushed. Subsequently, this collar 32 is flanged to the outside, so that this fastening element 24 is connected to the gas spring 8 so that it cannot move. The assembly of the gas spring 8 in the tube 20 is facilitated to the extent that after inserting the gas spring 8 into the tube 20 only with a soft hammer, such as a rubber hammer or the like. must be struck on the pin 11 of the piston rod 10 in order to fully drive the cylindrical housing 9 of the gas spring 8 into the tube 20 and to bring the fastening element 24 into the locking position shown in the drawing.

Alternativ kann das Befestigungselement 24 auch einseitig offen sein und quer unter den Ringbund 32 geschoben werden. Eine solche Ausgestaltung würde eine Erneuerung des Befestigungselementes 24 nach einer Demontage der Gasfeder 8 aus dem Rohr 20 erleichtern.Alternatively, the fastening element 24 can also be open on one side and pushed transversely under the collar 32. Such a configuration would make it easier to replace the fastening element 24 after the gas spring 8 has been removed from the tube 20.

Selbstverständlich kann das Rohr 20 auch einen unrunden Querschnitt aufweisen, insbesondere also polygonal ausgebildet sein. Es sollte in einem solchen Fall mindestens 3-eckigen Querschnitt aufweisen, wobei zweckmäßige Ausgestaltungen einen 6- oder 8-eckigen Querschnitt aufweisen würden. In einem solchen Fall müßte die Führungsbüchse 25 einen entsprechend angepaßten Querschnitt aufweisen. Wenn auf diese Weise das Rohr 20 zusammen mit der Gasfeder 8 gegenüber dem Führungsrohr 1 undrehbar gemacht würde, könnte naturgemäß auch das Axial-Kugel-Lager 12 entfallen.Of course, the tube 20 can also have a non-circular cross-section, in particular thus be of polygonal design. In such a case, it should have at least a triangular cross section, expedient configurations having a hexagonal or octagonal cross section. In such a case, the guide bushing 25 should have a correspondingly adapted cross section. If in this way the tube 20 together with the gas spring 8 were made non-rotatable relative to the guide tube 1, the axial ball bearing 12 could of course also be omitted.

In den Figuren 3 und 4 ist eine weitere Ausführungsform dargestellt, wobei Fig. 3 einige Einzelheiten der verwendeten Gasfeder 8 zeigt. Diese ist - gleichermaßen wie bei den Ausführungsformen nach den Fig. 1 und 2 - im Grundsatz so aufgebaut, wie es in der DE-PS 18 12 282 (entspr. US-PS 3 656 593) dargestellt und beschrieben ist. An ihrem kolbenstängenaustrittsseitigen Ende 10 weist sie eine Dichtungs- und Führungs-Büchse 33 auf, die einstückig oder - wie im vorliegenden Fall - zweiteilig ausgebildet sein kann. In dieser Büchse 33 ist eine gegen die Kolbenstange 10 anliegende Mehrfach-Lippen-Dichtung 34 angeordnet, die gegen die Kolbenstange 10 anliegt. Außerdem ist in ihr ein Dichtungsring 35 angeordnet, der gegen das zylindrische Gehäuse 9 der Gasfeder 8 anliegt, so daß hier ein gasdichter Verschluß vorgesehen ist. Das zylindrische Gehäuse 9 der Gasfeder 8 weist einen um diese Büchse 33 umgebördelten Rand 36 auf. Die Büchse 33 weist einen nach außen aus dem Gehäuse 9 herausragenden hülsenartigen Abschnitt 37 auf, der die Kolbenstange 10 umgibt. Dieser hülsenartige Abschnitt 37 weist wiederum benachbart zum Rand 36 eine Hinterschneidung 38 auf. Im Bereich dieser Hinterschneidung ist als Befestigungselement 24 eine sogenannte Kralle angeordnet, die aus einem Ring 39 mit nach außen ragenden federnden Vorsprüngen 40 gebildet ist. Dieses Befestigungselement 24 besteht aus Federstahl. Die Vorsprünge 40 sind nach außen entgegen der Einschubrichtung 41 geneigt, so daß sie sich in der Innenwand des Rohres 20 widerhakenartig entgegen der Einschubrichtung 41 verklammern können.A further embodiment is shown in FIGS. 3 and 4, FIG. 3 showing some details of the gas spring 8 used. This is - in the same way as in the embodiments according to FIGS. 1 and 2 - basically constructed as it is shown and described in DE-PS 18 12 282 (corresponding to US-PS 3,656,593). At its piston rod outlet end 10, it has a sealing and guide bushing 33, which can be made in one piece or - as in the present case - in two parts. In this sleeve 33 a multi-lip seal 34 abutting against the piston rod 10 is arranged, which abuts against the piston rod 10. In addition, a sealing ring 35 is arranged in it, which bears against the cylindrical housing 9 of the gas spring 8, so that a gas-tight closure is provided here. The cylindrical housing 9 of the gas spring 8 has an edge 36 flanged over this sleeve 33. The sleeve 33 has a sleeve-like section 37 which projects outward from the housing 9 and surrounds the piston rod 10. This sleeve-like section 37 in turn has an undercut 38 adjacent to the edge 36. In the area of this undercut, a so-called claw is arranged as a fastening element 24, which is formed from a ring 39 with resilient projections 40 projecting outwards. This fastener 24 is made of spring steel. The projections 40 are inclined outwards against the direction of insertion 41, so that they can cling to the inside wall of the tube 20 like barbs against the direction of insertion 41.

Der Ring 39 wird axial auf dem hülsenartigen Abschnitt 37 durch einen als Zackenring 42 ausgebildeten Sicherungsring gehalten, dessen radial nach innen vorspringende federnde Zacken 43 in der Hinterschneidung 38 gehalten und gesichert sind. Das Befestigungselement 24 kann also durch einfaches Aufschieben und durch anschließendes Aufschieben des Zackenringes 42 auf den hülsenartigen Abschnitt 37 montiert und axial gehalten werden.The ring 39 is held axially on the sleeve-like section 37 by a locking ring designed as a toothed ring 42, the resilient teeth 43 of which protrude radially inwards are held in the undercut 38 and are secured. The fastening element 24 can thus be mounted and held axially by simply sliding it on and then sliding the toothed ring 42 onto the sleeve-like section 37.

Der hülsenartige Abschnitt weist - wie aus Fig. 3 hervorgeht - zwei einander diametral gegenüberliegende, sich bis zum Rand 36 erstreckende zueinander parallele ebene Flächen 44 auf, deren Abstand einem Normabstand für einen Maulschlüssel entspricht. Der Ring 39 des Befestigungselementes 24 ist mit zwei zugeordneten Anlageflächen 45 versehen, so daß das Befestigungselement 24 drehfest auf dem hülsenartigen Abschnitt 37 angebracht ist. Die Dichtungs- und Führungs-Büchse 33 mit dem Abschnitt 37 ist selbstverständlich drehfest in der Gasfeder 8 befestigt.The sleeve-like section has - as can be seen in FIG. 3 - two diametrically opposed, mutually parallel flat surfaces 44 which extend to the edge 36 and whose distance corresponds to a standard distance for an open-end wrench. The ring 39 of the fastening element 24 is provided with two associated contact surfaces 45, so that the fastening element 24 is attached in a rotationally fixed manner on the sleeve-like section 37. The sealing and guide bushing 33 with the section 37 is of course fixed in the gas spring 8 in a rotationally fixed manner.

In der Innenwand des Rohres 20 ist im Bereich seiner Einschuböffnung 46 eine mehrfach mit Steigung umlaufende Rille.47 (also ein gewindeartiger Einschnitt) ausgebildet. Beim Eindrücken der Gasfeder 8 in das Rohr 20 können die federnden Vorsprünge 40 des Befestigungselementes 24 aufgrund ihrer bereits erwähnten Neigung jeweils nachgeben, bis sie in dem Bereich der Rille einrasten, dem die endgültige axial festliegende Position der Gasfeder 8 im Rohr 20 entspricht. Ein rein axiales Lösen des Befestigungselementes 24 und damit ein Herausziehen der Gasfeder 8 aus dem Rohr 20 ist praktisch ausgeschlossen. Durch Drehen der Gasfeder 8 relativ zum Rohr 20 mittels eines Schraubenschlüssels, der an den Flächen 44 des hülsenartigen Abschnitts 37.,unmittelbar außerhalb des Rohres 20 angreift, kann aber aufgrund des Eingreifens der federnden Vorsprünge 40 in die Rille 47 die Gasfeder 8 aus dem Rohr 20 herausgeschraubt werden.In the inner wall of the tube 20, in the region of its insertion opening 46, a groove 47 (multiple times with an incline) (that is, a thread-like incision) is formed. When the gas spring 8 is pressed into the tube 20, the resilient projections 40 of the fastening element 24 can yield due to their already mentioned inclination until they engage in the area of the groove to which the final axially fixed position of the gas spring 8 in the tube 20 corresponds. A purely axial loosening of the fastening element 24 and thus pulling the gas spring 8 out of the tube 20 is practically impossible. By rotating the gas spring 8 relative to the tube 20 by means of a wrench which engages the surfaces 44 of the sleeve-like section 37., directly outside the tube 20, the gas spring 8 can be removed from the tube due to the engagement of the resilient projections 40 in the groove 47 20 are unscrewed.

Es ist also eine sehr einfache Montage durch axiales Eindrücken, gleichzeitig aber auch eine Demontage durch Schrauben möglich. Die federnde Verspannung der Vorsprünge 40 in der Rille 47 wirkt dabei wie eine zusätzliche axiale Sicherung.So it is a very simple assembly by axially pressing in, but at the same time dismantling by screws is possible. The resilient bracing of the projections 40 in the groove 47 acts like an additional axial securing.

Claims (11)

1. Blockierbare Hubvorrichtung zum stufenlosen Verstellen von Stuhlsitzen, Tischplatten oder ähnlichen Möbelteilen, mit einem mit einem Fußgestell (4) verbindbaren Führungsrohr (1) und mit einer längenverstellbaren Gasfeder (8), deren Kolbenstange (10) mit einer Bodenplatte (5) des Führungsrohres (1) axial fest aber lösbar verbunden ist, deren Gehäuse (9) mittels eines oberen Befestigungsabschnittes (21) mit einer entsprechenden Nabe (22) mit dem Stuhlsitz oder der Tischplatte axial fest, wenn auch grundsätzlich lösbar verbindbar ist, deren Gehäuse (9) im Führungsrohr (1) seitlich fest und axial verschiebbar geführt ist, und aus deren Gehäuse (9) nach oben ein Betätigungsstößel (26) zum Län- genverstellen der Gasfeder (8) in den Befestigungsabschnitt (21) hineinragt, dadurch gekennzeichnet, daß das Gehäuse (9) der Gasfeder (8) radial fest in einem zusätzlichen Rohr (20) angeordnet ist, an dem der Befestigungsabschnitt (21) ausgebildet ist, wobei das eine Ende des Gehäuses (9) axial gegen einen Anschlag im Bereich des Befestigungsabschnittes (21) anliegt und wobei das andere Ende gegen ein lösbar mit dem Rohr (20) verbundenes Befestigungselement (24) anliegt.1.Blockable lifting device for stepless adjustment of chair seats, table tops or similar furniture parts, with a guide tube (1) which can be connected to a base frame (4) and with a length-adjustable gas spring (8), the piston rod (10) of which has a base plate (5) of the guide tube (1) is axially fixed but releasably connected, the housing (9) of which by means of an upper fastening section (21) with a corresponding hub (22) is axially fixed to the chair seat or the table top, although in principle releasably connectable, the housing (9) laterally in the guide tube (1) fixed and axially displaceably guided, and from which housing (9) upwards an actuating tappet (26) for County - genverstellen the gas spring (8) in the fastening portion (21) protrudes, characterized in that the housing (9) the gas spring (8) is arranged radially fixed in an additional tube (20) on which the fastening section (21) is formed, the one end of the housing (9) being axially ge against a stop in the region of the fastening section (21) and the other end abuts against a fastening element (24) which is detachably connected to the tube (20). 2. Blockierbare Hubvorrichtung nach Patentanspruch 1, dadurch gekennzeichnet, daß das Gehäuse (9) der Gasfeder (8) mit Schiebesitz in dem Rohr (20) angeordnet ist.2. Lockable lifting device according to claim 1, characterized in that the housing (9) of the gas spring (8) is arranged with a sliding fit in the tube (20). 3. Blockierbare Hubvorrichtung nach Patentanspruch 1 oder 2, dadurch gekennzeichnet, daß der Anschlag im Bereich des Befestigungsabschnittes (21) durch eine Hülse (23) aus weicherem Material als das Rohr (20) und/ oder das Gehäuse (9) gebildet ist.3. Lockable lifting device according to claim 1 or 2, characterized in that the stop in the region of the fastening section (21) is formed by a sleeve (23) made of softer material than the tube (20) and / or the housing (9). 4. Blockierbare Hubvorrichtung nach Patentanspruch 3, dadurch gekennzeichnet, daß im Befestigungsabschnitt (21) ein aus letzterem herausragender, gegen den Betätigungsstößel (26) anliegender Schiebekörper (27) angeordnet ist, der mit der Hülse (23) verbunden ist.4. Lockable lifting device according to claim 3, characterized in that in the fastening section (21) a protruding from the latter, against the actuating plunger (26) adjacent sliding body (27) is arranged, which is connected to the sleeve (23). 5. Blockierbare Hubvorrichtung nach Patentanspruch 1 oder 2, dadurch gekennzeichnet, daß das Befestigungselement (24) durch einen elastischen Klemmring gebildet ist.5. Lockable lifting device according to claim 1 or 2, characterized in that the fastening element (24) is formed by an elastic clamping ring. 6. Blockierbare Hubvorrichtung nach Patentanspruch 5, dadurch gekennzeichnet, daß das Befestigungselement (24) axial unverschiebbar mit der Gasfeder (8) verbunden ist.6. Lockable lifting device according to claim 5, characterized in that the fastening element (24) is axially immovably connected to the gas spring (8). 7. Blockierbare Hubvorrichtung nach Patentanspruch 6, dadurch gekennzeichnet, daß das Befestigungselement (24) an der Innenwand des Rohres (20) anliegende federnde Vorsprünge (40) aufweist.7. Lockable lifting device according to claim 6, characterized in that the fastening element (24) on the inner wall of the tube (20) has resilient projections (40). 8. Blockierbare Hubvorrichtung nach Patentanspruch 7, dadurch gekennzeichnet, daß das Befestigungselement (24) drehfest mit der Gasfeder (8) verbunden ist und daß die federnden Vorsprünge .(40) in mindestens eine Rille (47) mit Steigung in der Innenwand des Rohres (20) eingreifen.8. Lockable lifting device according to claim 7, characterized in that the fastening element (24) is rotatably connected to the gas spring (8) and that the resilient projections. (40) in at least one groove (47) with a slope in the inner wall of the tube ( 20) intervene. 9. Blockierbare Hubvorrichtung nach Patentanspruch 8, dadurch gekennzeichnet, daß die Gasfeder (8) einen aus dem Rohr (20) herausragenden Ansatz (hülsenartiger Abschnitt 37) aufweist.9. Lockable lifting device according to claim 8, characterized in that the gas spring (8) has a protruding from the tube (20) projection (sleeve-like section 37). 10. Blockierbare Hubvorrichtung nach Patentanspruch 9, dadurch gekennzeichnet, daß die Gasfeder (8) mit Flächen (44) für einen Schraubenschlüssel versehen ist.10. Lockable lifting device according to claim 9, characterized in that the gas spring (8) is provided with surfaces (44) for a wrench. 11. Längenverstellbare Gasfeder (8) für eine blockierbare Hubvorrichtung zum stufenlosen Verstellen von Stuhlsitzen, Tischplatten oder ähnlichen Möbelteilen, mit einem mit einem Fußgestell (4) verbindbaren Führungsrohr (1), deren Kolbenstange (10) mit einer Bodenplatte des Führungsrohres (1) axial fest aber lösbar verbunden ist, deren Gehäuse (9) mittels eines oberen Befestigungsabschnitts (21) mit einer entsprechenden Nabe (22) mit dem Stuhlsitz oder der Tischplatte axial fest, wenn auch grundsätzlich lösbar verbindbar ist, deren Gehäuse (9) im Führungsrohr (1) seitlich fest und axial verschiebbar führbar ist, und aus deren Gehäuse (9) nach oben ein Betätigungsstößel (26) zum Längenverstellen der Gasfeder (8) hinausragt, dadurch gekennzeichnet, daß das Gehäuse (9) der Gasfeder (8) radial fest in einem zusätzlichen Rohr (20) angeordnet ist, an dem der Befestigungsabschnitt (21) ausgebildet ist, daß das eine Ende des Gehäuses (9) axial gegen einen Anschlag im Bereich des Befestigungsabschnittes (21) anliegt und daß das andere Ende gegen ein lösbar mit dem Rohr (20) verbundenes Befestigungselement (24) anliegt.11. Length-adjustable gas spring (8) for a blockable lifting device for the continuous adjustment of chair seats, table tops or similar furniture parts, with a guide tube (1) that can be connected to a base frame (4), the piston rod (10) with a base plate of the guide tube (1) axially is firmly but releasably connected, the housing (9) of which is axially fixed, if in principle releasably connectable, to the chair seat or the table top by means of an upper fastening section (21) with a corresponding hub (22), the housing (9) of which in the guide tube (1 ) laterally fixed and axially displaceable, and an actuating plunger (26) for adjusting the length of the gas spring (8) protrudes from the housing (9), characterized in that the housing (9) of the gas spring (8) is radially fixed in one additional tube (20) is arranged, on which the fastening section (21) is formed, that one end of the housing (9) axially against a stop in the region of the fastening abs Chnittes (21) and that the other end rests against a detachably connected to the tube (20) fastener (24).
EP84108990A 1983-07-29 1984-07-28 Lockable lifting device for the infinitely variable positioning of seats, table tops or similar articles, and lengthwise adjustable gas spring for such a lifting device Expired EP0133524B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84108990T ATE30504T1 (en) 1983-07-29 1984-07-28 LOCKABLE LIFTING DEVICE FOR CONTINUOUS ADJUSTMENT OF CHAIR SEATS, TABLE TOPS OR SIMILAR FURNITURE PARTS, AND LENGTH-ADJUSTABLE GAS SPRING FOR SUCH LIFTING DEVICE.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3327425 1983-07-29
DE3327425 1983-07-29
DE3413804 1984-04-12
DE19843413804 DE3413804A1 (en) 1983-07-29 1984-04-12 LOCKABLE LIFTING DEVICE FOR CONTINUOUSLY ADJUSTING CHAIR SEATS, TABLETOP OR SIMILAR FURNITURE

Publications (3)

Publication Number Publication Date
EP0133524A2 true EP0133524A2 (en) 1985-02-27
EP0133524A3 EP0133524A3 (en) 1986-04-02
EP0133524B1 EP0133524B1 (en) 1987-11-04

Family

ID=25812741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84108990A Expired EP0133524B1 (en) 1983-07-29 1984-07-28 Lockable lifting device for the infinitely variable positioning of seats, table tops or similar articles, and lengthwise adjustable gas spring for such a lifting device

Country Status (6)

Country Link
EP (1) EP0133524B1 (en)
JP (1) JPS6054446U (en)
AT (1) ATE30504T1 (en)
BR (1) BR8403750A (en)
DE (3) DE8321916U1 (en)
ES (1) ES280727Y (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0707160A1 (en) 1994-07-28 1996-04-17 SUSPA COMPART Aktiengesellschaft Adjustable-length gas spring for chairs, tables etc.
EP0847717A3 (en) * 1996-12-12 2000-12-20 SUSPA Holding GmbH A length adjustable column for chairs or the like

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3420528A1 (en) * 1984-06-01 1985-12-05 Stabilus Gmbh, 5400 Koblenz CONTINUOUSLY ADJUSTABLE LIFTING DEVICE
DE3437097C2 (en) * 1984-10-10 1995-10-26 Stabilus Gmbh Infinitely adjustable lifting device
DE3512201A1 (en) * 1985-04-03 1986-10-09 Inaba Seisakusho Ltd., Tokio/Tokyo TABLE WITH A TABLE BASE
DE8800976U1 (en) * 1988-01-28 1989-06-01 Fritz Bauer + Söhne oHG, 8503 Altdorf Lockable lifting device for stepless adjustment of furniture parts and guide bush for such a lifting device
DE3833959A1 (en) * 1988-10-06 1990-04-12 Bauer Fritz & Soehne Ohg LENGTH ADJUSTABLE COLUMN FOR CHAIRS, TABLES OR THE LIKE
DE4200786A1 (en) * 1992-01-14 1993-07-15 Suspa Compart Ag LENGTH ADJUSTABLE COLUMN FOR TABLES, CHAIRS OR THE LIKE
DE4209446A1 (en) * 1992-03-24 1993-09-30 Suspa Compart Ag Length-adjustable gas spring and chair with such a gas spring
DE4227553A1 (en) * 1992-08-20 1994-02-24 Stabilus Gmbh Height adjustable support esp. for chair seat - has foot, upright, guide surface, support in bottom of upright.
DE4329611A1 (en) * 1993-09-02 1995-03-09 Suspa Compart Ag Adjustable column for chairs, tables or the like.
DE4444176C2 (en) * 1994-12-12 2002-01-24 Stabilus Gmbh Piston cylinder unit for a standpipe
DE19501301A1 (en) * 1995-01-18 1996-07-25 Suspa Compart Ag Length adjustable gas spring
DE19515368A1 (en) * 1995-05-02 1996-11-07 Suspa Compart Ag Length-adjustable gas spring with release and actuator
DE29904980U1 (en) 1999-03-18 1999-06-17 Suspa Compart Ag, 90518 Altdorf Adjustable column for chairs, tables or the like. and length adjustment element therefor
DE102004034220B3 (en) * 2004-07-14 2006-02-23 Stabilus Gmbh Slides column

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US3250509A (en) * 1964-07-20 1966-05-10 Brunswick Corp Chair structure
DE7019918U (en) * 1970-05-29 1970-09-10 Suspa Federungstech ENERGY ACCUMULATOR, IN PARTICULAR LOCKABLE GAS SPRING.
DE1931012A1 (en) * 1969-06-19 1970-12-23 Fritz Bauer Lifting device for infinitely variable height adjustment, especially the seat of chairs, stools or the like.
US3788587A (en) * 1971-12-23 1974-01-29 Stabilus Ind Handels Gmbh Resilient column
DE2836666A1 (en) * 1978-08-22 1980-03-06 Suspa Federungstech DEVICE FOR FASTENING CHAIR OR TABLE COLUMNS TO THE UNDER SIDE OF CHAIR OR TABLE TOP OR THE LIKE.
CH619604A5 (en) * 1977-08-25 1980-10-15 Fehlbaum & Co Apparatus for adjusting the seat height on a swivel chair
EP0034068A2 (en) * 1980-02-11 1981-08-19 Steelcase Inc. Height adjustment device for furniture and a chair incorporating the device

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DE1287276B (en) * 1966-06-30 1969-01-16 Mauser Kg Spring-loaded swivel chair with height adjustment device
DE8218078U1 (en) * 1982-06-24 1982-11-18 HPZ Hydropneumatische Zugfeder GmbH, 4422 Ahaus LOCKING DEVICE e.g. WITH AN ARMREST ADJUSTMENT

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Publication number Priority date Publication date Assignee Title
US3250509A (en) * 1964-07-20 1966-05-10 Brunswick Corp Chair structure
DE1931012A1 (en) * 1969-06-19 1970-12-23 Fritz Bauer Lifting device for infinitely variable height adjustment, especially the seat of chairs, stools or the like.
DE7019918U (en) * 1970-05-29 1970-09-10 Suspa Federungstech ENERGY ACCUMULATOR, IN PARTICULAR LOCKABLE GAS SPRING.
US3788587A (en) * 1971-12-23 1974-01-29 Stabilus Ind Handels Gmbh Resilient column
CH619604A5 (en) * 1977-08-25 1980-10-15 Fehlbaum & Co Apparatus for adjusting the seat height on a swivel chair
DE2836666A1 (en) * 1978-08-22 1980-03-06 Suspa Federungstech DEVICE FOR FASTENING CHAIR OR TABLE COLUMNS TO THE UNDER SIDE OF CHAIR OR TABLE TOP OR THE LIKE.
EP0034068A2 (en) * 1980-02-11 1981-08-19 Steelcase Inc. Height adjustment device for furniture and a chair incorporating the device

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0707160A1 (en) 1994-07-28 1996-04-17 SUSPA COMPART Aktiengesellschaft Adjustable-length gas spring for chairs, tables etc.
EP0847717A3 (en) * 1996-12-12 2000-12-20 SUSPA Holding GmbH A length adjustable column for chairs or the like

Also Published As

Publication number Publication date
DE3467090D1 (en) 1987-12-10
ES280727U (en) 1985-02-16
ES280727Y (en) 1985-09-16
EP0133524A3 (en) 1986-04-02
ATE30504T1 (en) 1987-11-15
EP0133524B1 (en) 1987-11-04
BR8403750A (en) 1985-07-02
JPH0132905Y2 (en) 1989-10-06
DE8321916U1 (en) 1983-11-17
DE3413804A1 (en) 1985-02-07
DE3413804C2 (en) 1993-07-29
JPS6054446U (en) 1985-04-17

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