EP0133524A2 - Dispositif de levage verrouillable, permettant le réglage de manière continue de sièges, dessus de table ou d'éléments de mobilier similaires, et ressort à gaz de longueur réglable pour un tel dispositif de levage - Google Patents

Dispositif de levage verrouillable, permettant le réglage de manière continue de sièges, dessus de table ou d'éléments de mobilier similaires, et ressort à gaz de longueur réglable pour un tel dispositif de levage 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
Authority
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
Other languages
German (de)
English (en)
Other versions
EP0133524B1 (fr
EP0133524A3 (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
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fritz Bauer and Sohne OHG filed Critical Fritz Bauer and Sohne OHG
Priority to AT84108990T priority Critical patent/ATE30504T1/de
Publication of EP0133524A2 publication Critical patent/EP0133524A2/fr
Publication of EP0133524A3 publication Critical patent/EP0133524A3/de
Application granted granted Critical
Publication of EP0133524B1 publication Critical patent/EP0133524B1/fr
Expired legal-status Critical Current

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Classifications

    • 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)
EP84108990A 1983-07-29 1984-07-28 Dispositif de levage verrouillable, permettant le réglage de manière continue de sièges, dessus de table ou d'éléments de mobilier similaires, et ressort à gaz de longueur réglable pour un tel dispositif de levage Expired EP0133524B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84108990T ATE30504T1 (de) 1983-07-29 1984-07-28 Blockierbare hubvorrichtung zum stufenlosen verstellen von stuhlsitzen, tischplatten oder aehnlichen moebelteilen, und laengenverstellbare gasfeder fuer eine solche hubvorrichtung.

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3327425 1983-07-29
DE3327425 1983-07-29
DE19843413804 DE3413804A1 (de) 1983-07-29 1984-04-12 Blockierbare hubvorrichtung zum stufenlosen verstellen von stuhlsitzen, tischplatten oder aehnlichen moebelteilen
DE3413804 1984-04-12

Publications (3)

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

Family

ID=25812741

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84108990A Expired EP0133524B1 (fr) 1983-07-29 1984-07-28 Dispositif de levage verrouillable, permettant le réglage de manière continue de sièges, dessus de table ou d'éléments de mobilier similaires, et ressort à gaz de longueur réglable pour un tel dispositif de levage

Country Status (6)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0707160A1 (fr) 1994-07-28 1996-04-17 SUSPA COMPART Aktiengesellschaft Ressort pneumatique de longueur réglable
EP0847717A3 (fr) * 1996-12-12 2000-12-20 SUSPA Holding GmbH Colonne réglable en longueur pour chaises ou analogues

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3420528A1 (de) * 1984-06-01 1985-12-05 Stabilus Gmbh, 5400 Koblenz Stufenlos verstellbare hubvorrichtung
DE3437097C2 (de) * 1984-10-10 1995-10-26 Stabilus Gmbh Stufenlos verstellbare Hubvorrichtung
DE3512201A1 (de) * 1985-04-03 1986-10-09 Inaba Seisakusho Ltd., Tokio/Tokyo Tisch mit einem tischgestell
DE8800976U1 (fr) * 1988-01-28 1989-06-01 Fritz Bauer + Soehne Ohg, 8503 Altdorf, De
DE3833959A1 (de) * 1988-10-06 1990-04-12 Bauer Fritz & Soehne Ohg Laengenverstellbare saeule fuer stuehle, tische oder dergleichen
DE4200786A1 (de) * 1992-01-14 1993-07-15 Suspa Compart Ag Laengenverstellbare saeule fuer tische, stuehle o. dgl.
DE4209446A1 (de) * 1992-03-24 1993-09-30 Suspa Compart Ag Längenverstellbare Gasfeder und Stuhl mit einer solchen Gasfeder
DE4227553A1 (de) * 1992-08-20 1994-02-24 Stabilus Gmbh Höhenverstellbare Stützvorrichtung, insbesondere für die Sitzfläche eines Stuhles
DE4329611A1 (de) * 1993-09-02 1995-03-09 Suspa Compart Ag Längenverstellbare Säule für Stühle, Tische o. dgl.
DE4444176C2 (de) * 1994-12-12 2002-01-24 Stabilus Gmbh Kolbenzylinder-Aggregat für ein Standrohr
DE19501301A1 (de) * 1995-01-18 1996-07-25 Suspa Compart Ag Längenverstellelement, insbesondere längenverstellbare Gasfeder
DE19515368A1 (de) * 1995-05-02 1996-11-07 Suspa Compart Ag Längenverstellbare Gasfeder
DE29904980U1 (de) 1999-03-18 1999-06-17 Suspa Compart Ag Längenverstellbare Säule für Stühle, Tische o.dgl. und Längenverstellelement hierfür
DE102004034220B3 (de) * 2004-07-14 2006-02-23 Stabilus Gmbh Objektträgersäule

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3250509A (en) * 1964-07-20 1966-05-10 Brunswick Corp Chair structure
DE7019918U (de) * 1970-05-29 1970-09-10 Suspa Federungstech Kraftspeicher, insbesondere blockierbare gasfeder.
DE1931012A1 (de) * 1969-06-19 1970-12-23 Fritz Bauer Hubvorrichtung zum stufenlosen Hoeherverstellen,insbesondere der Sitzflaeche von Stuehlen,Hockern od.dgl.
US3788587A (en) * 1971-12-23 1974-01-29 Stabilus Ind Handels Gmbh Resilient column
DE2836666A1 (de) * 1978-08-22 1980-03-06 Suspa Federungstech Vorrichtung zur befestigung von stuhl- oder tischsaeulen an der unterseite von stuhl- oder tischplatten o.dgl.
CH619604A5 (en) * 1977-08-25 1980-10-15 Fehlbaum & Co Apparatus for adjusting the seat height on a swivel chair
EP0034068A2 (fr) * 1980-02-11 1981-08-19 Steelcase Inc. Dispositif de réglage en hauteur pour mobilier et siège muni de ce dispositif

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1287276B (de) * 1966-06-30 1969-01-16 Mauser Kg Federnder Drehstuhl mit Hoehenverstellvorrichtung
DE8218078U1 (de) * 1982-06-24 1982-11-18 HPZ Hydropneumatische Zugfeder GmbH, 4422 Ahaus Feststellvorrichtung z.b. bei einer armlehnenverstellung

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3250509A (en) * 1964-07-20 1966-05-10 Brunswick Corp Chair structure
DE1931012A1 (de) * 1969-06-19 1970-12-23 Fritz Bauer Hubvorrichtung zum stufenlosen Hoeherverstellen,insbesondere der Sitzflaeche von Stuehlen,Hockern od.dgl.
DE7019918U (de) * 1970-05-29 1970-09-10 Suspa Federungstech Kraftspeicher, insbesondere blockierbare gasfeder.
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 (de) * 1978-08-22 1980-03-06 Suspa Federungstech Vorrichtung zur befestigung von stuhl- oder tischsaeulen an der unterseite von stuhl- oder tischplatten o.dgl.
EP0034068A2 (fr) * 1980-02-11 1981-08-19 Steelcase Inc. Dispositif de réglage en hauteur pour mobilier et siège muni de ce dispositif

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0707160A1 (fr) 1994-07-28 1996-04-17 SUSPA COMPART Aktiengesellschaft Ressort pneumatique de longueur réglable
EP0847717A3 (fr) * 1996-12-12 2000-12-20 SUSPA Holding GmbH Colonne réglable en longueur pour chaises ou analogues

Also Published As

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

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