EP0511500A1 - Vérin blocable pour le réglage continu de sièges - Google Patents

Vérin blocable pour le réglage continu de sièges Download PDF

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Publication number
EP0511500A1
EP0511500A1 EP92105397A EP92105397A EP0511500A1 EP 0511500 A1 EP0511500 A1 EP 0511500A1 EP 92105397 A EP92105397 A EP 92105397A EP 92105397 A EP92105397 A EP 92105397A EP 0511500 A1 EP0511500 A1 EP 0511500A1
Authority
EP
European Patent Office
Prior art keywords
tube
guide
guide tube
lifting device
additional
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
EP92105397A
Other languages
German (de)
English (en)
Other versions
EP0511500B1 (fr
Inventor
Helge Siegner
Ludwig Stadelmann
Herbert Wolf
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.)
Suspa Compart AG
Original Assignee
Suspa Compart AG
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 Suspa Compart AG filed Critical Suspa Compart AG
Publication of EP0511500A1 publication Critical patent/EP0511500A1/fr
Application granted granted Critical
Publication of EP0511500B1 publication Critical patent/EP0511500B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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.
  • 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 not only a load-bearing and length-adjustable, but also a guiding and rotating element of a chair or table column. Since the piston rod in the base plate of the guide tube is not only freely rotatable, but is also fixed radially with sufficient play, the gas spring can align itself according to any changing load directions on the seat or table top, thereby eliminating the risk of jamming in the guide bushing.
  • Length-adjustable gas springs of the type used here are known from DE-PS 18 12 282 (corresponding to US Pat. No. 3,656,593 and JP-PS 846 405). These gas springs can additionally have a protective tube firmly connected to their housing, as is known from EP 0 133 524 B1 (corresponding to US Pat. No. 4,979,718 corresponding to JP-60 54446 U1).
  • the gas spring represents the most complex and expensive component. Accordingly, it is desirable to be able to realize as many different chairs, tables or similar furniture parts as possible with as few different types of gas springs as possible. Design limits are achieved primarily in that the maximum stroke is limited by the configuration described above.
  • the object of the invention is to increase the stroke of such devices without intervention in the construction of the gas spring.
  • this object is achieved by the characterizing part of claim 1.
  • the combination of a telescopic arrangement due to the additional tube, which allows an extended stroke, with a mechanical spring is therefore provided in addition to the gas spring.
  • the housing of the gas spring When loading from above, e.g. when a person sits on the seat of the seat, when the lifting device is shortened, the housing of the gas spring is first moved relative to the piston rod until e.g. the seat support or another stop, which is axially fixed to the housing of the gas spring, comes to rest on the upper end face of the additional tube or the first guide bushing used there. Only the force of the gas spring acts during this path.
  • the mechanical spring is advantageously designed as a helical compression spring, so that it can advantageously be arranged in the region of the additional tube or the guide tube.
  • the helical spring is arranged surrounding the upper end of the additional tube between an annular collar at the free end of the additional tube and the front end of the guide tube.
  • This ring collar can be realized in a simple manner by bending the upper end of the additional tube.
  • the opposite stop of the coil spring is formed by the second guide bush or by the outer edge of the guide tube.
  • the helical spring is arranged in the interior of the guide tube and is supported on the one hand against the lower end face of the additional tube and on the other hand against an inner stop of the guide tube. This can be done with a separate ring collar or e.g. be formed by the bottom plate of the guide tube.
  • the additional tube can advantageously have an end stop which engages behind an edge of the second guide bush facing the base plate. In this way, a simple axial fixing of the second guide bush relative to the additional tube is possible.
  • the end stop can be formed by widening the corresponding end of the additional tube or, according to another advantageous embodiment, can engage behind the second guide bush in an elastically resilient manner radially to the central longitudinal axis.
  • the second guide bushing has in the region of its upper end facing away from the base plate of the guide tube at least one elastic holding projection which, together with a projection on the upper edge of the guide tube, forms an axial locking device.
  • a thrust ring can be provided on the outside of the housing of the gas spring in the area of the fastening of a seat carrier.
  • a lifting device shown in Fig. 1 comprises a lower guide tube 1, which is substantially cylindrical, but in its lower region has a downwardly tapering section 2, which is used for receiving in a corresponding hub 3 of a base frame 4.
  • the guide tube 1 is provided in the region 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 with the guide tube 1.
  • a length-adjustable, hydraulically or pneumatically lockable gas spring 8 is provided, the cylindrical housing 9 of which extends in the upper region of the guide tube 1 or beyond it.
  • the associated piston rod 10 projects downward from the housing 9 and is detachably connected to the base plate 5.
  • 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.
  • the pin 11 passes through the opening 7 with a sufficient radial play of a few tenths of a millimeter to one millimeter, so that the piston rod 10 is not radially clamped relative to the guide tube 1. From the outside, that is, from below, 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 inserted in such a way that the piston rod 10 of the gas spring 8 is axially fixed but detachable with the guide tube 1 connected is. 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. The embodiment described so far is known from DE 38 33 959 A1 (corresponding to US Pat. No. 4,969,619 and JP Hei-1-257 991).
  • An additional tube 20 is inserted into the guide tube 1 from the top thereof.
  • the additional tube 20 is bent outwards at its lower end to form an end stop 21.
  • the end stop 21 bears against an edge 21a of a plastic guide bushing 22 facing the base plate 5.
  • the guide bushing 22 has, on its area opposite the edge 21a, radially resilient holding projections 23 to the central longitudinal axis 6.
  • inward projections 24 are provided, which are engaged by the resilient holding projections 23 and thus form an axial stop for them. This prevents the additional tube 20 with the guide bush 22 from emerging axially from the guide tube 1.
  • the end stop 21 is provided with slots 21b so that the additional tube 20 can be inserted into the guide bush 22.
  • the end stop 21 is bent elastically towards the central longitudinal axis 6 and springs up elastically at the end of the insertion, so that it then lies behind the edge 21a.
  • the guide bushing 22 is secured against pushing the guide bushing 22 into the guide tube 1 by a stop edge 22a which bears against the upper free edge of the guide tube 1.
  • the guide bush 22 is thus fixed in the guide tube 1 in both directions of the central longitudinal axis 6.
  • the guide bushing 22 is supported in a known manner radially against the guide tube 1 by means of ribs 22b.
  • the free upper end of the additional tube 20 is bent outwards to form an annular collar 25.
  • a helical compression spring 26 rests on the one hand on the underside of this annular collar 25 and on the other hand on the upper side or end face of the guide bushing 22 fixed in the guide tube 1 and accordingly presses the additional tube 20 into an extended position in the direction away from the base plate 5, specifically in the position shown in Fig. 1 in which the end stop 21 bears against the associated edge 21a of the guide bush 22.
  • a further guide bushing 27 is arranged, which rests with an edge bead 28 on the annular collar 25 of the additional tube 20 and is thus secured against slipping axially into the additional tube 20.
  • the housing 9 of the gas spring 8 is axially movably supported in the guide bushing 27 in the direction of the central longitudinal axis 6.
  • a conical fastening section 29 is formed thereon, which engages in a holding cone 30 of a seat support 31, which is only indicated schematically.
  • a push ring 32 is axially immovable.
  • An actuating pin 34 protrudes from the fastening section 29, by means of which a valve located in the housing 9 of the gas spring 8 can be opened or closed. If the valve is closed, the gas spring is largely blocked, i.e. the piston rod 10 is not freely displaceable relative to the housing 9. If, on the other hand, the valve is opened by pushing the actuating pin 34 in, the total length of the gas spring can be changed by pushing the piston rod 10 into the housing 9 or by moving the piston rod 10 out of the housing 9.
  • Such length-adjustable or lockable gas springs 8 are generally known, for example from DE-PS 18 12 282 (corresponding to US-PS 3,656,593 and JP-PS 846 405).
  • the mode of operation is as follows, starting from the position shown in Fig. 1, in which the piston rod 10 is fully extended from the housing 9, so that the lifting device has its maximum length overall.
  • the length adjustment of the gas spring 8 takes place with the actuating pin 34 pushed into its housing 9.
  • the housing 9 of the gas spring 8 first moves in the guide bushing 27 by the path A until the underside of the thrust ring 32, or if such is not provided, the lower edge of the seat support 31 comes to rest on the annular collar 25 or the annular bead 28.
  • the additional tube 20 becomes relative when the coil spring 26 is compressed moved to the guide bush 22 until the coil spring 26 is fully compressed.
  • a route B is traveled through here.
  • an overall stroke C which is extended from the sum of A + B, is achieved compared to conventional chair columns, without changes having to be made to the gas spring 8 itself.
  • the total stroke C of the lifting device can thus be made relatively large, on the other hand, sufficient guidance of the housing 9 of the gas spring 8 is still ensured even when the gas spring 8 is largely or fully extended.
  • Fig. 2 shows a variant in which a helical compression spring is not arranged between the collar 25 of the additional tube 20 and the end face of the guide bush 22. Rather, a helical compression spring 26a is supported on the one hand against the base plate 5 and on the other hand against the end stop 21 of the additional tube 20. This also causes the additional tube 20 to be acted on in the direction away from the base plate 5 of the guide tube 1. With the difference that the helical compression spring 26 is not present, the lifting device according to FIG. 2 is otherwise identical to that according to FIG. 1, so that only the lower section has to be shown.
  • the overall spring characteristic of gas spring 8 on the one hand and helical compression spring 26 or 26a on the other hand is steeper.
  • the housing 9 of the gas spring 8 is already relieved by the abovementioned forces on the stop damper 19. The length adjustment during path B is thus cushioned more or damped.

Landscapes

  • Chairs Characterized By Structure (AREA)
  • Tables And Desks Characterized By Structural Shape (AREA)
  • Fluid-Damping Devices (AREA)
EP92105397A 1991-05-01 1992-03-28 Vérin blocable pour le réglage continu de sièges Expired - Lifetime EP0511500B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4114227 1991-05-01
DE4114227 1991-05-01
DE4207470 1992-03-10
DE4207470A DE4207470A1 (de) 1991-05-01 1992-03-10 Blockierbare hubvorrichtung zum stufenlosen verstellen von stuhlsitzen

Publications (2)

Publication Number Publication Date
EP0511500A1 true EP0511500A1 (fr) 1992-11-04
EP0511500B1 EP0511500B1 (fr) 1995-05-17

Family

ID=25903286

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92105397A Expired - Lifetime EP0511500B1 (fr) 1991-05-01 1992-03-28 Vérin blocable pour le réglage continu de sièges

Country Status (4)

Country Link
US (1) US5188345A (fr)
EP (1) EP0511500B1 (fr)
JP (1) JP3307983B2 (fr)
DE (2) DE4207470A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0624329A1 (fr) * 1993-05-12 1994-11-17 Airaxs.A. Tube de guidage pour colonne télescopique de meuble réglable en hauteur
US5377942A (en) * 1990-10-31 1995-01-03 Stabilus Gmbh Column unit
US5443573A (en) * 1992-10-05 1995-08-22 Stabilus Gmbh Guide means for telescoping cylindrical parts and a column unit comprising such guide means
US5497966A (en) * 1992-04-11 1996-03-12 Stabilus Gmbh Column unit, in particular a chair column unit
FR2953894A1 (fr) * 2009-12-16 2011-06-17 Stabilus Gmbh Colonne de support d'objet
CN101675846B (zh) * 2008-09-17 2012-02-29 施塔比鲁斯有限责任公司 高度可调式家具
EP2868230A1 (fr) * 2013-11-05 2015-05-06 Sedus Stoll AG Dispositif de réglage en hauteur et chaise dotée d'un tel dispositif de réglage en hauteur

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4313766A1 (de) * 1993-04-27 1994-11-03 Suspa Compart Ag Längenverstellbare Säule für Stühle, Tische od. dgl.
US5366275A (en) * 1993-06-16 1994-11-22 L & P Property Management Company Gas operated foot stool
DE4329611A1 (de) * 1993-09-02 1995-03-09 Suspa Compart Ag Längenverstellbare Säule für Stühle, Tische o. dgl.
DE9402272U1 (de) * 1994-02-11 1994-03-31 Suspa Compart Ag, 90518 Altdorf Längenverstellbare Säule für Stühle, Tische o.dgl. und Feder-Sicherungsklammer hierfür
US5539944A (en) * 1994-11-25 1996-07-30 Parma Corporation Foldable bed with collapsible sinuous springs
US5673633A (en) * 1995-05-31 1997-10-07 Pfister; Joel W. Table leg system
ES2143338B1 (es) * 1996-04-11 2000-12-01 Gain Gas Technique Sl Cilindro hidraulico.
US5855363A (en) * 1996-10-04 1999-01-05 Svendsen; Mark G. Spring and rebound support for bicycle seat
CN1106512C (zh) * 1997-06-04 2003-04-23 燃气技术开发公司 气筒
US6394005B1 (en) 2000-07-28 2002-05-28 Valley Design Enterprises, Inc. Articulating locking mechanism
EP1342433A1 (fr) * 2002-03-06 2003-09-10 Schäfer, Klaus Elément de réglage hydraulique
DE10302984B3 (de) * 2003-01-25 2004-05-06 Stabilus Gmbh Säuleneinheit
KR100875544B1 (ko) * 2007-12-31 2008-12-26 주식회사 삼홍사 가스 실린더
DE102012100220B4 (de) * 2012-01-12 2015-01-15 Stabilus Gmbh Antriebseinrichtung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2358852A1 (fr) * 1976-07-23 1978-02-17 Stabilus Gmbh Colonne telescopique, notamment pour sieges
DE3322796A1 (de) * 1983-06-24 1985-01-03 Eckard St. Margrethen Hansen Federelement
US4720068A (en) * 1986-08-29 1988-01-19 Tornero Lino E Seat support column
EP0325726A1 (fr) * 1988-01-28 1989-08-02 SUSPA COMPART Aktiengesellschaft Dispositif de levage blocable pour le réglage de parties de meubles et guidage pour un tel dispositif de levage

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1812282C3 (de) * 1968-12-03 1981-07-30 Fritz Bauer + Söhne oHG, 8503 Altdorf Hubvorrichtung zum stufenlosen Höhenverstellen von Tischplatten, Stuhlsitzen u.dgl.
CH514317A (de) * 1969-06-19 1971-10-31 Bauer Fritz Hubvorrichtung zum stufenlosen Höherverstellen einer Tragfläche, insbesondere Sitzfläche von Stühlen oder Hockern
DE2542182C3 (de) * 1975-09-22 1980-01-03 Georg Fritzmeier Kg, 8011 Grosshelfendorf Einstellvorrichtung für mittels eines Federelements an einem dem Fahrzeugaufbau zugeordneten Traggestell abgestützte Fahrzeugsitze
DE7833768U1 (de) * 1978-11-14 1979-04-05 Stabilus Gmbh, 5400 Koblenz Hoehenverstellbare saeule
DE8422413U1 (de) * 1983-07-29 1985-11-21 Fritz Bauer + Söhne oHG, 8503 Altdorf Längenverstellbare Gasfeder für eine blockierbare Hubvorrichtung zum strufenlosen Verstellen von Stuhlsitzen, Tischplatten oder ähnlichen Möbelstücken
DE3420528A1 (de) * 1984-06-01 1985-12-05 Stabilus Gmbh, 5400 Koblenz Stufenlos verstellbare hubvorrichtung
JP2670271B2 (ja) * 1987-07-14 1997-10-29 株式会社ショーワ 油圧緩衝器のオイルロック装置
DE3833959A1 (de) * 1988-10-06 1990-04-12 Bauer Fritz & Soehne Ohg Laengenverstellbare saeule fuer stuehle, tische oder dergleichen
DE3932146A1 (de) * 1989-09-27 1991-04-04 Stabilus Gmbh Axiallager fuer die saeule einer hydropneumatischen sitzmoebel-hoehenverstellung

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2358852A1 (fr) * 1976-07-23 1978-02-17 Stabilus Gmbh Colonne telescopique, notamment pour sieges
DE3322796A1 (de) * 1983-06-24 1985-01-03 Eckard St. Margrethen Hansen Federelement
US4720068A (en) * 1986-08-29 1988-01-19 Tornero Lino E Seat support column
EP0325726A1 (fr) * 1988-01-28 1989-08-02 SUSPA COMPART Aktiengesellschaft Dispositif de levage blocable pour le réglage de parties de meubles et guidage pour un tel dispositif de levage

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5377942A (en) * 1990-10-31 1995-01-03 Stabilus Gmbh Column unit
US5497966A (en) * 1992-04-11 1996-03-12 Stabilus Gmbh Column unit, in particular a chair column unit
US5443573A (en) * 1992-10-05 1995-08-22 Stabilus Gmbh Guide means for telescoping cylindrical parts and a column unit comprising such guide means
EP0624329A1 (fr) * 1993-05-12 1994-11-17 Airaxs.A. Tube de guidage pour colonne télescopique de meuble réglable en hauteur
FR2705020A1 (fr) * 1993-05-12 1994-11-18 Airax Sa Tube de guidage pour colonne télescopique de meuble réglable en hauteur.
CN101675846B (zh) * 2008-09-17 2012-02-29 施塔比鲁斯有限责任公司 高度可调式家具
FR2953894A1 (fr) * 2009-12-16 2011-06-17 Stabilus Gmbh Colonne de support d'objet
EP2868230A1 (fr) * 2013-11-05 2015-05-06 Sedus Stoll AG Dispositif de réglage en hauteur et chaise dotée d'un tel dispositif de réglage en hauteur

Also Published As

Publication number Publication date
DE4207470A1 (de) 1992-11-05
JP3307983B2 (ja) 2002-07-29
JPH05154022A (ja) 1993-06-22
US5188345A (en) 1993-02-23
DE59202196D1 (de) 1995-06-22
EP0511500B1 (fr) 1995-05-17

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