EP0521762A1 - Säule für eine Möbelstütze, die mit einer Gasfeder ausgestattet ist - Google Patents

Säule für eine Möbelstütze, die mit einer Gasfeder ausgestattet ist Download PDF

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Publication number
EP0521762A1
EP0521762A1 EP92401836A EP92401836A EP0521762A1 EP 0521762 A1 EP0521762 A1 EP 0521762A1 EP 92401836 A EP92401836 A EP 92401836A EP 92401836 A EP92401836 A EP 92401836A EP 0521762 A1 EP0521762 A1 EP 0521762A1
Authority
EP
European Patent Office
Prior art keywords
gas spring
tube
sleeve
column
pusher
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
EP92401836A
Other languages
English (en)
French (fr)
Other versions
EP0521762B1 (de
Inventor
Dominique Dony
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.)
Airax SA
Original Assignee
Airax SA
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 Airax SA filed Critical Airax SA
Publication of EP0521762A1 publication Critical patent/EP0521762A1/de
Application granted granted Critical
Publication of EP0521762B1 publication Critical patent/EP0521762B1/de
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 present invention relates to a column intended to be part of a furniture support or another piece of furniture equipped with a gas spring.
  • the gas spring compensates for the weight of the upper part and is used to adjust the length of the column, and therefore to maintain the height chosen for the upper part.
  • Its body is placed, with lateral play, in the sliding tube and its rod is fixed by its end opposite to the piston, on the bottom of the support tube.
  • the body carries, at its end opposite the rod, a locking control finger, movable axially.
  • the seat cushion is fitted with an articulated device enabling the control finger to be actuated.
  • the column inside which the gas spring is placed, constitutes an assembly which is delivered as is to the furniture manufacturer, who must simply fix it on the base and on the seat.
  • the foot and the seat each comprise a part in the form of a hollow cone, and the ends of the column, that is to say those of the support tube and of the sliding tube, have a corresponding suitable conical shape, for a press fit.
  • the upper stop means is a frustoconical piece of less rigid material than that of the sliding tube.
  • the object of the present invention is to provide a column for seats which has an improved service life, without appreciable increase in the weight and the cost price of this column.
  • the upper stop means mentioned above is constituted by a rigid metal sleeve, fixed by hard fitting in the upper part of the sliding tube and extending at least over the entire frustoconical end part. of it.
  • a sleeve which also serves as a stop means for the gas spring. It is therefore not necessary to provide an additional part, it was sufficient to change the shape and the material of the stop means.
  • the thickness of the sleeve is not sufficient for it to serve as a stop means, it can be provided that it is folded inwards at its lower part to form one or more roughly radial surfaces, against which s supports the upper face of the gas spring body.
  • the sleeve can be produced from a section of the cylindrical tube, which is given a frustoconical shape suitable for the press.
  • the sleeve is formed from a split sleeve. The shaping is then easier, and one is assured of a uniform contact between the sleeve and the inner surface of the cone.
  • the invention makes it possible to provide an advantageous solution to a problem to which the prior art provides only costly and complicated solutions, namely the problem of adjustment of the length of the actuating power of the gas spring control finger.
  • the pusher can be adjusted in length when assembling the furniture, or before this operation.
  • relatively small variations in diameter of the frustoconical end portions of the sliding tube and of the corresponding hollow portion of the upper part cause significant variations in the axial position of the top of the pusher.
  • the pusher comprises a lower part in which an upper part is screwed axially which can be turned by hand or with a tool, while a pin which passes through a vertical slot immobilizes in rotation the lower part, without preventing axial movements.
  • the pusher is of non-circular section, and slides in a hole of corresponding shape in the upper stop means. This is prevented from turning in the sliding tube by tightening between the upper end of the gas spring body and the conical inner surface of the sliding tube. This makes it necessary to produce parts of complicated shape, independently of other drawbacks which will be explained below.
  • the sleeve has internally reliefs which cooperate with corresponding reliefs of the pusher to prevent rotation of the latter around the vertical axis. This avoids weakening the end region of the sliding tube by a slit.
  • the interior reliefs are prepared before, during, or after the conical shaping. If the sleeve is produced from a split bushing, the internal reliefs are produced even more easily, by folding preceded or not by the formation of slots limiting the folded parts.
  • a sleeve formed by a split socket makes it possible to easily produce one or more internal projections at any point of this socket, and in particular on the lips of the slot, to constitute the reliefs preventing rotation of the pusher.
  • the pusher carries elastic tongues of shape and dimensions calculated so that it can be passed at will through the opening of the narrow part of the sleeve, but only an undesired departure, under the effect of a shock, for example, is practically impossible.
  • the manufacturer of the column will be able to set up the pusher, or replace it with another at the request of the customer, before shipping to the place of assembly, without risk of seeing the pusher escape during transport.
  • the conical shape of the inside of the sleeve means that, during use, the tongues slide with gentle friction and do not force not to exaggerated efforts to activate the control finger.
  • the body of the gas spring is held in place by two stop means, upper and lower, and, in certain embodiments, it is pressed against the upper stop means to prevent it ci to turn on itself when adjusting the length of the pusher.
  • This tightening is obtained using the lower stop means, often designed as a screw.
  • Such a construction subjects the body of the gas spring to a permanent axial stress, and causes the stresses applied to the sliding tube by the upper part of the cabinet, in particular the seat, to be transmitted to it. This can affect the longevity of the assembly and is not desirable.
  • the upper stop means is made of a less rigid material than the steel which forms the sliding tube and the body of the gas spring, for example in "Zamak" alloy, but the resulting improvement is necessarily limited, since a significant axial stress is always necessary, and an insufficiently rigid material would adversely affect the precision of the length adjustment of the pusher.
  • the invention results in that an axial tightening of the gas spring is not necessary, because the sleeve, which serves as an upper stop means, cannot rotate, because it is force fitted.
  • a deformable element is interposed between the lower stop means and the body of the gas spring.
  • the lower stop means is constituted by a threaded part cooperating with a thread of the sliding tube, stop means provided at the lower end of said tube limiting its movement, and the deformable element is constituted by a flexible flange, in one piece with the stop means, and which protrudes into the sliding tube to bear on the body of the gas spring.
  • Reference 1 designates the column, which will be described in detail below.
  • This column of generally cylindrical shape with a converging frustoconical upper end, slides with gentle friction in a support tube 2, integral with a foot 3, which is only shown in part.
  • the connection between the foot 3 and the support tube 2 is obtained by the fact that the lower end of this tube is conical and is force-fitted into a conical bore, of corresponding shape of the foot.
  • the invention also applies in the case of another mode of connection, for example by welding.
  • the support tube 2 is provided, internally, towards its upper end, with a bush 4 of plastic material with low coefficient of friction, to facilitate the sliding of the column.
  • the frustoconical end of the column 1 is force-fitted into a frustoconical recess of a support piece 5, integral with the seat of the seat, which is not shown.
  • Column 1 comprises a cylindrical-frustoconical sliding tube 6, made of metal, inside which is housed the body 7 of a gas spring.
  • a game 8 which by standards current is about 1.5% of the diameter of the body 7, exists between the tube 6 and the body 7.
  • the piston rod 9 of the gas spring is directed downward. It is fixed to the bottom 10 of the support tube 2, with the insertion of a ball bearing 11, in known manner.
  • the bottom 10 consists of a bowl with a conical edge, of a shape adapted to be force fitted inside the conical lower end of the support tube 2. It is clear that other shapes and fixing methods, in particular by welding, are possible.
  • a reinforcing sleeve 12 made of steel, is mounted with hard friction inside the tube 6, and extends to its upper end, while the lower end of the sleeve 12 extends down slightly. beyond the frustoconical part 13 of the tube 6.
  • the thickness of the sleeve 12 is several times greater than the dimension of the clearance 8 between the body 7 of the gas spring and the tube 6, so that this body comes to bear over the entire length of the lower edge 14 of the sleeve 12, and does not risk taking an oblique position. If it is desired to be able to equip the column with a gas spring of smaller diameter, it is possible to provide tongues 15, shown in dashed lines in the figure, folded inwards and intended to serve as a bearing surface for the gas spring.
  • a control finger 16 movable vertically, projects at the upper end of the body 7 of the gas spring. In known manner, it serves to immobilize the piston rod 9 in a desired position, in order to fix the height of the seat above the ground.
  • the depression of the finger 16 controls the release, and therefore allows this height to be changed.
  • the control finger 16 is controlled by the user using a lever 17 mounted by a hinge 18 on the support piece.
  • This pusher 19 is a plastic part having a certain flexibility. Its lower end 20 is of concave shape, and comes to bear on the convex end of finger 16.
  • the pusher 19 has an axial blind hole 21, into which a self-tapping screw 22 is inserted, the head of which can come into contact with the lever 17. It is understood that the more or less the screw 22 in the pusher 19 makes it possible to vary the length of the assembly, which is close to that of the sleeve 12, so that at rest, the lever 17 does not exert constant pressure on the control finger 16, but that it can, however, be easily actuated by the user, in order to cause the release of the gas spring.
  • a stop integral with the support piece limits the movement of the lever 17 in the direction opposite to the gas spring, and therefore fixes the maximum length that the assembly formed by the pusher 19 and the screw 22 can have.
  • a tongue 23, in one piece with the sleeve, is folded inward, and enters a longitudinal groove 24 of the pusher 19.
  • the cooperation of the folded tongue 23 and the groove 24 prevents rotation of the pusher 19 around the vertical axis, while allowing it to slide parallel to this axis.
  • the pusher itself is immobilized in rotation, in a simple manner, and without additional part, by socket 12.
  • the folded tongue 23 extends over the entire length of one of the lips of the slot 25 of the sleeve.
  • Figure 2 shows that the pusher 19 further carries deformable tongues 27, which bear on the inner surface of the sleeve 12. These tabs hold this pusher inside the sleeve during transport which precedes the assembly and the assembly itself, while allowing the movement with gentle friction of the pusher 19 inside the sleeve 12 This results from the fact that the internal conicity of the sleeve 12 means that the friction increases if the pusher 19 is pushed or pulled towards the outside of the tube 6.
  • the lower end of the tube 6 is internally threaded, and is provided with a screw cap 30, which has an axial hole 31 for the passage of the piston rod 9 of the gas spring, and which carries, at its upper part, that is to say that which is inside the tube 6, a deformable flange 32, against which the lower end of the body 7 of the gas spring is continuously supported in a flexible manner, which keeps it all by absorbing the shocks and possible stresses that this body could undergo.
  • the stopper 30 has a shoulder 33, which abuts against the lower edge of the tube 6, so as to prevent excessive tightening of the stopper, which would reduce the effect of the flexible collar 32.
EP92401836A 1991-07-01 1992-06-29 Säule für eine Möbelstütze, die mit einer Gasfeder ausgestattet ist Expired - Lifetime EP0521762B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9108156A FR2678495B1 (fr) 1991-07-01 1991-07-01 Colonne destinee a faire partie d'un support de meuble equipe d'un ressort a gaz.
FR9108156 1991-07-01

Publications (2)

Publication Number Publication Date
EP0521762A1 true EP0521762A1 (de) 1993-01-07
EP0521762B1 EP0521762B1 (de) 1995-04-19

Family

ID=9414529

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92401836A Expired - Lifetime EP0521762B1 (de) 1991-07-01 1992-06-29 Säule für eine Möbelstütze, die mit einer Gasfeder ausgestattet ist

Country Status (7)

Country Link
US (1) US5284312A (de)
EP (1) EP0521762B1 (de)
AT (1) ATE121278T1 (de)
CA (1) CA2072305C (de)
DE (1) DE69202112T2 (de)
ES (1) ES2073887T3 (de)
FR (1) FR2678495B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100442536B1 (ko) * 2001-08-28 2004-08-04 이종환 회전의자의 작동레버 설치구조
EP1750032A2 (de) * 2005-08-01 2007-02-07 Stabilus GmbH Kolbenzylindereinheit
FR2953894A1 (fr) * 2009-12-16 2011-06-17 Stabilus Gmbh Colonne de support d'objet

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4227553A1 (de) * 1992-08-20 1994-02-24 Stabilus Gmbh Höhenverstellbare Stützvorrichtung, insbesondere für die Sitzfläche eines Stuhles
DE4233407A1 (de) * 1992-10-05 1994-04-07 Stabilus Gmbh Führung für teleskopartig ineinander verschiebbare zylindrische Teile
CA2119341A1 (en) * 1993-08-13 1995-02-14 Vittorio Infanti Adjustable game stool assembly
US5511759A (en) * 1994-05-26 1996-04-30 Steelcase, Inc. Hydraulic chair height adjustment mechanism
US5782536A (en) * 1995-02-17 1998-07-21 Steelcase Inc. Modular chair construction and method of assembly
DE19628721C2 (de) * 1996-07-17 1999-01-21 Stabilus Gmbh Höhenverstellbare Säule
JP3923126B2 (ja) * 1997-03-17 2007-05-30 スーガン株式会社 医療器具用スタンド
US6471178B1 (en) * 1997-05-21 2002-10-29 Cabex Ag Device for adjusting the length of a support and method for producing same
US6116555A (en) * 1998-05-29 2000-09-12 Krueger International, Inc. Plastic chair base including hub with integral ring and oppositely-directed tapers
US7028957B1 (en) 1998-10-15 2006-04-18 John Larson Easily assembled and disassembled tables
US6491269B1 (en) * 1999-05-06 2002-12-10 John E. Larson Gas spring quick release mechanism and method of use
AT407947B (de) * 1998-10-20 2001-07-25 Locker Ernst A Sitzeinrichtung
US6290296B1 (en) * 1999-07-01 2001-09-18 Northfield Metal Products Limited Anti-rattle pad
US6290191B1 (en) 1999-08-19 2001-09-18 Steelcase Development Corporation Chair base
GB2412306A (en) * 2004-03-23 2005-09-28 Sunpex Technology Co Ltd Motorised wheelchair with seat height adjustment.
US20060082203A1 (en) * 2004-10-20 2006-04-20 Gasser Chair Company, Inc. Adjustable gaming stool with releasable locking assembly
DE202008014043U1 (de) * 2008-10-22 2010-03-11 Tepe-Walser, Silvia Federweiche Lagerungszwischenstücke
CN104862453B (zh) * 2015-05-20 2017-12-19 上海皮尔博格有色零部件有限公司 高度调节装置及可调节支架结构
DE102016103566A1 (de) * 2016-02-29 2017-08-31 Oelschläger Metalltechnik GmbH Teleskopierbares Tischgestellbauteil, Verfahren zur Herstellung einer Gleitführung und Vorrichtung zur Durchführung des Verfahrens

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH619604A5 (en) * 1977-08-25 1980-10-15 Fehlbaum & Co Apparatus for adjusting the seat height on a swivel chair
DE8417962U1 (de) * 1984-06-14 1984-09-13 Wilhelm Link GmbH & Co KG Stahlrohrmöbel, 7475 Meßstetten Stuhlsaeule fuer hoehenverstellbare stuehle
EP0366128A1 (de) * 1988-10-26 1990-05-02 Stabilus GmbH Längenverstellbare und verschliessbare Vorrichtung

Family Cites Families (11)

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DE2630483A1 (de) * 1976-07-07 1978-01-12 Suspa Federungstech In der hoehe verstellbares stuhl- oder tischgestell
DE7722659U1 (de) * 1977-07-20 1977-11-17 Stabilus Gmbh, 5400 Koblenz Laengenverstellbare teleskopsaeule
CA1154369A (en) * 1980-02-11 1983-09-27 Duane M. Beukema Height adjustor for furniture
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
DE3437097C2 (de) * 1984-10-10 1995-10-26 Stabilus Gmbh Stufenlos verstellbare Hubvorrichtung
DE3517003A1 (de) * 1985-05-10 1986-11-13 Stabilus Gmbh, 5400 Koblenz Konusverbindung an einer hoehenverstellbaren stuhl- oder tischsaeule
US4720068A (en) * 1986-08-29 1988-01-19 Tornero Lino E Seat support column
DE8800976U1 (de) * 1988-01-28 1989-06-01 Fritz Bauer + Soehne Ohg, 8503 Altdorf, De
US5149035A (en) * 1988-09-01 1992-09-22 The Shaw-Walker Company Chair base and post assembly for an office chair
DE3833959A1 (de) * 1988-10-06 1990-04-12 Bauer Fritz & Soehne Ohg Laengenverstellbare saeule fuer stuehle, tische oder dergleichen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH619604A5 (en) * 1977-08-25 1980-10-15 Fehlbaum & Co Apparatus for adjusting the seat height on a swivel chair
DE8417962U1 (de) * 1984-06-14 1984-09-13 Wilhelm Link GmbH & Co KG Stahlrohrmöbel, 7475 Meßstetten Stuhlsaeule fuer hoehenverstellbare stuehle
EP0366128A1 (de) * 1988-10-26 1990-05-02 Stabilus GmbH Längenverstellbare und verschliessbare Vorrichtung

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100442536B1 (ko) * 2001-08-28 2004-08-04 이종환 회전의자의 작동레버 설치구조
EP1750032A2 (de) * 2005-08-01 2007-02-07 Stabilus GmbH Kolbenzylindereinheit
EP1750032A3 (de) * 2005-08-01 2008-05-28 Stabilus GmbH Kolbenzylindereinheit
FR2953894A1 (fr) * 2009-12-16 2011-06-17 Stabilus Gmbh Colonne de support d'objet

Also Published As

Publication number Publication date
CA2072305C (en) 2001-10-30
ATE121278T1 (de) 1995-05-15
CA2072305A1 (en) 1993-01-02
US5284312A (en) 1994-02-08
DE69202112D1 (de) 1995-05-24
DE69202112T2 (de) 1995-12-14
ES2073887T3 (es) 1995-08-16
FR2678495A1 (fr) 1993-01-08
EP0521762B1 (de) 1995-04-19
FR2678495B1 (fr) 1993-09-24

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