EP0551604A1 - Colonne réglable pour tables, sièges ou similaires - Google Patents

Colonne réglable pour tables, sièges ou similaires Download PDF

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Publication number
EP0551604A1
EP0551604A1 EP92120543A EP92120543A EP0551604A1 EP 0551604 A1 EP0551604 A1 EP 0551604A1 EP 92120543 A EP92120543 A EP 92120543A EP 92120543 A EP92120543 A EP 92120543A EP 0551604 A1 EP0551604 A1 EP 0551604A1
Authority
EP
European Patent Office
Prior art keywords
standpipe
column according
axis
guide tube
inner guide
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
EP92120543A
Other languages
German (de)
English (en)
Other versions
EP0551604B1 (fr
Inventor
Hans Jürgen 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.)
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 EP0551604A1 publication Critical patent/EP0551604A1/fr
Application granted granted Critical
Publication of EP0551604B1 publication Critical patent/EP0551604B1/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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32254—Lockable at fixed position
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/32—Articulated members
    • Y10T403/32254—Lockable at fixed position
    • Y10T403/32467—Telescoping members
    • Y10T403/32516—Remotely actuated
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T403/00—Joints and connections
    • Y10T403/70—Interfitted members
    • Y10T403/7075—Interfitted members including discrete retainer
    • Y10T403/7077—Interfitted members including discrete retainer for telescoping members

Definitions

  • the invention relates to a length-adjustable column according to the preamble of claim 1.
  • the invention is therefore based on the object of designing a column of the generic type in such a way that the standpipe is inexpensive is producible, but at the same time gives the length adjustment element an exact fixed lateral guide.
  • the measures according to the invention ensure that the standpipe designed as a composite pipe is extremely rigid in itself.
  • the outer tube and inner guide tube can be made very thin-walled, since the rigidity comes from the shape of a composite tube.
  • the pedestal can therefore be made with a minimal amount of plastic.
  • the machining, for example broaching, of the part-cylinder surfaces which serve as guide surfaces ensures that the housing of the length adjustment element is guided very precisely. Because only partial cylinder surfaces are machined over the circumference, between which recesses remain, only relatively narrow chips are cut, so that this shape ensures that the partial cylinder surfaces during machining, in particular spaces not be damaged. A high surface quality of the part-cylinder surfaces is therefore guaranteed.
  • the chair column shown in the drawing has a standpipe 1, in which a length-adjustable gas spring 2 is arranged as a pneumatic or hydropneumatic piston-cylinder adjusting element.
  • the standpipe 1 and the gas spring 2 have a common central longitudinal axis 3.
  • An outer housing 4 of the gas spring 2 is supported in an inner guide tube 5 of the standpipe 1 so as to be displaceable in the direction of the axis 3.
  • the guide tube 5 extends over the full length of the standpipe 1.
  • the outer housing 4 of the gas spring 2 can be its housing itself or a protective tube surrounding it on the outside.
  • a piston rod 6 protrudes from the housing 4 of the gas spring 2 and is supported in the direction of the axis 3 via an axial roller bearing 7 in relation to a base plate 8 of the standpipe 1.
  • a pin 9 of the piston rod 6 passing through the axial roller bearing 7 extends through an opening 10 of the base plate 8 which is concentric with the axis 3. It is secured against being pulled out of the base plate 8 by means of a spring retaining ring 11 resting against the underside thereof.
  • the diameter of the opening 10 is larger than the diameter of the pin 9.
  • the standpipe 1 has, adjacent to the base plate 8, a conical section 14 tapering slightly towards it, by means of which the standpipe 1 is fastened in a corresponding cone bushing of a chair cross or the like. is possible.
  • a stop damping ring 15 for example made of foamed elastic plastic, is arranged, by means of which a hard impact of the housing 4 against the axial roller bearing 7 is prevented.
  • the standpipe 1 has a continuous outer pipe 16 with a smooth outer surface, on which the cone section 14 is formed. Between the cone section 14 and the upper end 17 opposite the base plate 8, it is smoothly cylindrical on the outside. It also runs concentrically to the central longitudinal axis 3.
  • the outer tube 16 is formed in one piece with the inner guide tube 5; the standpipe 1 thus forms a double-walled composite pipe.
  • the inner guide tube 5 and the outer tube 16 are connected to one another by means of support webs 18 which extend radially to the axis 3 and which are likewise formed in one piece with the two tubes 5, 16.
  • the base plate 8 is also formed in one piece with the standpipe 1.
  • the guide tube 5 and the outer tube 16 are connected to one another adjacent to the base plate 8 by means of a base ring 19, so that the cavities 20 between two adjacent support webs 18 and the corresponding sections of the inner guide tube 5 and the outer tube 16 form closed channels. At the upper end 17 of the standpipe 1, these cavities 20 are closed by means of an elastically snap-in cover ring 21.
  • the standpipe 1 is made in one piece from plastic, preferably from a polyacetal, by injection molding. After spraying, the inner surface 22 of the inner guide tube 5 has an undersize compared to the circular-cylindrical housing 4 of the gas spring 2; this undersize is necessary so that the inner guide tube 5 of the standpipe 1 can be provided with a very precisely calibrated inner surface 22 serving as a guide surface for the housing 4 in a machining operation.
  • the inner surface 22 of the guide tube 5 has a polygonal design before the machining process mentioned, namely in the form of a regular polygon, the central axis of which is also formed by the axis 3.
  • the central axis of which is also formed by the axis 3.
  • it is designed in the form of a regular 12-corner. So it is formed by surfaces 23 whose corners - in relation to axis 3 - form recesses 24.
  • the distance R24 of each recess 24 from the axis 3 is accordingly greater than the smallest distance R23 of the surfaces 23 from the axis 3, this smallest distance R23 being in the middle between two corners or recesses 24.
  • R24>R4> R23 applies.
  • the inner surface 22 of the inner guide tube 5 configured in the manner described above is cleared in the course of the machining calibration in a broaching method, that is to say with a broaching needle which has broaching teeth extending over the entire circumference with a circular cutting edge.
  • a broaching needle which has broaching teeth extending over the entire circumference with a circular cutting edge.
  • - partial-cylinder surfaces 25 with a radius R25, which are arranged symmetrically to the axis 3 are cleared into the surfaces 23, the relationship being R24> R25 ⁇ R4, with R25 at most is a few hundredths of a millimeter larger, for example up to 0.05 mm, than R4.
  • the remaining groove-like recesses 24 can be used as lubrication grooves, ie as storage spaces for grease 26. This is possible in particular in a simple manner because these recesses 24 are closed down by the base plate 8, so that a Leakage of the grease from the standpipe 1 downwards is excluded.
  • FIGS. 4 and 5 differs from the exemplary embodiment according to FIGS. 1 to 3 only in the configuration of the inner surface of the inner guide tube 5.
  • FIGS. 4 and 5 are for FIGS 3 identical parts have been given the same reference numerals; for structurally not identical but functionally identical parts, the same reference numerals have been used with a prime. In no case is a new detailed description required.
  • guide webs 27 are formed on the inner surface 22 'of the inner guide tube 5'. They run the full axial length of the inner guide tube 5 'and project radially from the inner surface 22' to the axis 3. They are also formed in one piece with the standpipe 1 '. Before the already mentioned identical calibration process by broaching, the guide webs 27 have an oversize towards axis 3. This is reduced by the broaching process, so that 27 partial cylinder surfaces 25 'are then formed on the guide webs, which form the actual guide surfaces relative to the housing 4 of the gas spring 2. Corresponding recesses 24 'run between adjacent guide webs 27 as parts of the inner surface 22'.
  • R24 '> R25' ⁇ R4 applies to the radius R25 'of the partial cylinder surfaces 25' from the axis 3 and the distance R24 'of the recesses 24' from the axis 3 with respect to the radius R4 of the housing 4, where here, too, R25 'is at most a few hundredths of a millimeter, for example up to 0.05 mm, larger than R4.
  • each guide web 27 is provided at equal angular intervals and running parallel to the axis 3.
  • the width b of the recesses 24 'in the circumferential direction is approximately twice as large as the width c of the partial cylinder surfaces 25'.
  • Grease 26 can also be accommodated in these recesses 24 '.
  • broaching basically all other suitable machining processes can also be used, for example a butting which is very similar to the pressure broaching. If, due to the presence of the base plate 8, a broaching tool cannot be pulled or pushed completely through the inner guide tube 5 or 5 ', then it may be expedient to undercut the inner surfaces 22 or 22' in an area adjacent to the base plate 8, so that machining is not necessary here, but on the other hand a complete insertion of the housing 4 into the standpipe 1 or 1 'is not hindered.

Landscapes

  • Chairs Characterized By Structure (AREA)
  • Tables And Desks Characterized By Structural Shape (AREA)
  • Fluid-Damping Devices (AREA)
EP92120543A 1992-01-14 1992-12-02 Colonne réglable pour tables, sièges ou similaires Expired - Lifetime EP0551604B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4200786A DE4200786A1 (de) 1992-01-14 1992-01-14 Laengenverstellbare saeule fuer tische, stuehle o. dgl.
DE4200786 1992-01-14

Publications (2)

Publication Number Publication Date
EP0551604A1 true EP0551604A1 (fr) 1993-07-21
EP0551604B1 EP0551604B1 (fr) 1996-02-21

Family

ID=6449501

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92120543A Expired - Lifetime EP0551604B1 (fr) 1992-01-14 1992-12-02 Colonne réglable pour tables, sièges ou similaires

Country Status (4)

Country Link
US (1) US5333968A (fr)
EP (1) EP0551604B1 (fr)
JP (1) JPH0745077U (fr)
DE (2) DE4200786A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0745341A1 (fr) * 1995-05-30 1996-12-04 SUSPA COMPART Aktiengesellschaft Colonne réglable en longueur pour chaises, tables ou similaires, et tube de support
EP0958763A1 (fr) * 1998-05-15 1999-11-24 Cabex AG Support
KR100436415B1 (ko) * 2001-07-24 2004-06-16 주식회사 삼홍사 칼럼 유니트 및 칼럼 유니트의 튜브 가이드

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU657062B1 (en) * 1993-10-06 1995-02-23 Extrusion Facilities Pty. Ltd. A telescopic handle
JP2006071010A (ja) * 2004-09-02 2006-03-16 Fu Luong Hi-Tech Co Ltd 気圧棒
DE102022133666A1 (de) * 2022-12-16 2024-06-27 Thyssenkrupp Ag Schwingungsdämpfer für ein Fahrzeug

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4899969A (en) * 1988-01-28 1990-02-13 Fritz Bauer And Sohne Ohg Lockable elevating mechanism for the continuous adjustment of furniture and guide sleeve for such an elevating mechanism
EP0447674A1 (fr) * 1990-03-21 1991-09-25 SUSPA COMPART Aktiengesellschaft Ressort pneumatique de longeur réglable

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7340615U (de) * 1974-06-20 Stabilus Gmbh Führungsbuchse an einer der stufenlosen Höhenverstellung, insbesondere von Stuhlsitzen und Tischplatten, dienenden Gasfeder
DE1291568B (de) * 1967-05-10 1969-03-27 Fritzmeier Kg Georg Hydro-pneumatische Federung, insbesondere fuer Sitze
CH514317A (de) * 1969-06-19 1971-10-31 Bauer Fritz Hubvorrichtung zum stufenlosen Höherverstellen einer Tragfläche, insbesondere Sitzfläche von Stühlen oder Hockern
DE8321916U1 (de) * 1983-07-29 1983-11-17 Fritz Bauer + Söhne oHG, 8503 Altdorf Blockierbare hubvorrichtung zum stufenlosen verstellen von stuhlsitzen, tischplatten oder aehnlichen moebelteilen
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
DE3627138A1 (de) * 1986-08-09 1988-02-11 Stabilus Gmbh Fuehrung teleskopartig ineinander verschiebbare zylindrische teile
DE3939012A1 (de) * 1989-11-25 1991-05-29 Boge Ag Schwingungsdaempfer fuer ein kraftfahrzeug
DE4003245C2 (de) * 1990-02-03 1997-08-21 Stabilus Gmbh Führung für teleskopartig ineinander verschiebbare zylindrische Teile
DE4024392A1 (de) * 1990-08-01 1992-02-06 Suspa Compart Ag Verfahren zum herstellen einer gleitflaeche an einer aus kunststoff bestehenden fuehrungsbuechse fuer eine hoehenverstellbare stuhlsaeule
DE4034633A1 (de) * 1990-10-31 1992-05-07 Stabilus Gmbh Gasfeder zur hoehenverstellung
DE4102002C2 (de) * 1991-01-24 1999-09-30 Bayerische Motoren Werke Ag Stoßdämpfer

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4899969A (en) * 1988-01-28 1990-02-13 Fritz Bauer And Sohne Ohg Lockable elevating mechanism for the continuous adjustment of furniture and guide sleeve for such an elevating mechanism
EP0447674A1 (fr) * 1990-03-21 1991-09-25 SUSPA COMPART Aktiengesellschaft Ressort pneumatique de longeur réglable

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0745341A1 (fr) * 1995-05-30 1996-12-04 SUSPA COMPART Aktiengesellschaft Colonne réglable en longueur pour chaises, tables ou similaires, et tube de support
EP0958763A1 (fr) * 1998-05-15 1999-11-24 Cabex AG Support
US6267337B1 (en) 1998-05-15 2001-07-31 Cabex Ag Vertically adjustable support for a chair or table
KR100436415B1 (ko) * 2001-07-24 2004-06-16 주식회사 삼홍사 칼럼 유니트 및 칼럼 유니트의 튜브 가이드

Also Published As

Publication number Publication date
EP0551604B1 (fr) 1996-02-21
DE59205402D1 (de) 1996-03-28
US5333968A (en) 1994-08-02
DE4200786A1 (de) 1993-07-15
JPH0745077U (ja) 1995-12-19

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