EP1559349A1 - Adjustable length column for chair - Google Patents

Adjustable length column for chair Download PDF

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Publication number
EP1559349A1
EP1559349A1 EP04029283A EP04029283A EP1559349A1 EP 1559349 A1 EP1559349 A1 EP 1559349A1 EP 04029283 A EP04029283 A EP 04029283A EP 04029283 A EP04029283 A EP 04029283A EP 1559349 A1 EP1559349 A1 EP 1559349A1
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EP
European Patent Office
Prior art keywords
standpipe
housing
height
adjustable chair
locking
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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
EP04029283A
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German (de)
French (fr)
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EP1559349B1 (en
Inventor
Helmut Kastner
Gerhard Wunderling
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Suspa Holding GmbH
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Suspa Holding GmbH
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Publication of EP1559349A1 publication Critical patent/EP1559349A1/en
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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

  • Such chair pillars are well known. They have a length-adjustable Gas spring on, the housing in a standpipe sliding is guided. The standpipe is mounted in a pedestal while the Housing of the gas spring is guided in the standpipe, and usually in a guide bush mounted in the standpipe. If hereby equipped Chairs have a fold-up seat, then several Chairs are pushed into each other so far that the chair columns in one come relatively small distance from each other. This can be, for example for space-saving storage of chairs or for moving be helpful to a whole group of chairs. It is desirable to that the chairs take defined positions to each other and this maintained.
  • the invention is therefore based on the object, a height-adjustable Chair pillar in such a way that the standpipe and the housing of the Gas spring take a defined rotational angle position to each other can and maintain these too.
  • a particularly simple embodiment is to claim 5, wherein Claim 6 reflects how a particularly simple production of a positive rotation can be achieved.
  • Claims 7 and 8 give again, as well as the release in case of overload can be reached.
  • the requirements 9 and 10 give again, as a play in the direction of rotation play-free reachable is.
  • the measure according to claim 11 ensures that the anti-rotation device only in a very specific predetermined position of Locking element and the locking abutment can interlock.
  • the chair column shown in the drawing has a standpipe 1 and a guided in this by means of a guide bush 2, in the direction of a common central longitudinal axis 3 sliding, length-adjustable Gas spring 4 on.
  • the standpipe 1 has at its lower end a holding cone 5 for attachment in a conventional chair pedestal.
  • the gas spring 4 has a substantially cylindrical housing 6, the is guided in the guide bush 2. Concentric to the axis 3 is in the housing 6, an inner tube 7 is disposed between the housing 6 and the sixth an annular channel 8 is formed. At the outside of the standpipe 1 located upper end of the housing 6, a valve 9 is arranged in this the means of a protruding from the housing 6 actuating pin 10 is operable. It is used for selective connection of the annular channel. 8 with the valve 9 adjacent, formed in the inner tube 7 first Partial housing space 11.
  • a piston rod 12 concentric with the axis 3 and in their direction slidably arranged, which at the valve 9 opposite, located in the standpipe 1 lower end of the housing. 6 is led out of this. It is in this area by means of a guide-seal unit 13 gas-tight. Am located in the inner tube 7 End of the piston rod 12 is attached to this a piston 14, the sealed on the inner tube 7 is guided. He separates the first part-housing space 11 of one between the piston 14 and the guide-seal unit 13 trained second part housing space 15.
  • valve 9 adjacent end of the housing 6 is at this a cone-shaped tapered attachment portion 16 is formed by means of the gas spring 4 on a corresponding receptacle on the underside a chair seat, for example, a chair seat support, can be fastened.
  • the piston rod 12 supported via an axial bearing 17 on the bottom 18 of the standpipe 1 and there releasably secured by means of a fastening clip 19.
  • the annular channel 8 and the partial housing chambers 11 and 15 are under gas relatively high pressure and possibly a predetermined Filled amount of oil.
  • the second part housing space 15 is on the guide-seal unit 13 by means of an overflow channel 20 constantly with the Ring channel 8 connected.
  • the guide bush 2 has on its outer side longitudinal ribs 21, by means of derer she on the inner wall 22 of the standpipe 1 radially to the axis 3 supported. Between the longitudinal ribs 21 are corresponding longitudinal grooves 23 trained. At the located in the interior of the standpipe 1 End of the guide bushing 2, a locking abutment 24 is attached, essentially consisting of a ring 25 and formed thereon, extending parallel to the axis 3, inserted into the longitudinal grooves 23 Holding webs 26 exists. By means of these retaining webs 26 is the abutment 24 fixedly secured to the guide sleeve 2, in particular rotationally fixed. It is made with the also made of weldable plastic Guide bush 2 welded by ultrasonic welding or the like and held in place. The guide bush 2 itself is sufficient rotatably, optionally by additional securing means, in the Standpipe 1 pressed.
  • a locking element 27 attached, which is also formed substantially in the form of a ring is.
  • the guide bush 2, the locking abutment 24 and the Locking element 27 form a twist-lock.
  • the abutment 24 and the element 27 are each provided with cutouts 28, 29, whereby in turn locking webs 30, 31 are formed.
  • the cutouts 28, 29 and thus the webs 30, 31 are formed so that the locking web 30 of the abutment 24 in the cutout 29 of the element 27 and the Web 31 of the element 27 engages in the cutout 28 of the abutment 24, and free of play.
  • the webs 30, 31 each have inclined surfaces 32, 33 on, which are arranged obliquely to the axis 3, that the cutouts 28, 29 each expand to their open side.
  • the at the intervention of Elements 27 in the abutment 24 associated inclined surfaces 32 and 33 have the same opening angle a to an axis-parallel Line up.
  • the circumferential extent of the locking webs 30, 31 is such dimensioned that upon penetration of the locking element 27 in the locking abutment 24 between the bottom 34 of the cutout 28 of the abutment 24 and the locking web 31 of the locking element 27 and between the Floor 35 of the section 29 of the locking element and the locking bridge 30 a game 36 or 37 remains in the direction of the axis 3.
  • the inclined surfaces 32, 33 each firmly against each other, d. H. the Locking element 27 has no tangential game, so no rotation, opposite the abutment 24th
  • the opening angle a is chosen so that at correspondingly large, between Housing 6 and standpipe 1 acting torques the locking element 27 and the locking abutment 24 via the inclined surfaces 32, 33 are pressed apart in the direction of the axis 3.
  • the sizing via a vote in the extended state between the piston rod 12 and the housing 6 due to the internal gas pressure existing extension force and the mean radius r of the inclined surfaces 32, 33 and the torque considered admissible.
  • the twist-lock So works form-fitting until reaching the given Torque.

Abstract

The chair column has a gas spring (4) disposed in an upright tube (1) coaxial with a central longitudinal axis (3). The housing (6) of the gas spring is displaceable inside the upright tube in the direction of the central longitudinal axis to an extended position. A guide bush (2), an abutment (24) and a lock (27) lock the housing and the upright tube against rotation in the extended position.

Description

Derartige Stuhl-Säulen sind allgemein bekannt. Sie weisen eine längenverstellbare Gasfeder auf, deren Gehäuse in einem Standrohr verschiebbar geführt ist. Das Standrohr wird in einem Fußgestell befestigt, während das Gehäuse der Gasfeder im Standrohr geführt ist, und zwar in der Regel in einer im Standrohr angebrachten Führungsbüchse. Wenn hiermit ausgerüstete Stühle eine hochklappbare Sitzfläche aufweisen, dann können mehrere Stühle so weit ineinander geschoben werden, dass die Stuhl-Säulen in einen relativ geringen Abstand zueinander kommen. Dies kann beispielsweise zum platzsparenden Lagern von Stühlen oder auch zum Verschieben einer ganzen Gruppe von Stühlen hilfreich sein. Hierbei ist es wünschenswert, dass die Stühle definierte Positionen zueinander einnehmen und diese beibehalten.Such chair pillars are well known. They have a length-adjustable Gas spring on, the housing in a standpipe sliding is guided. The standpipe is mounted in a pedestal while the Housing of the gas spring is guided in the standpipe, and usually in a guide bush mounted in the standpipe. If hereby equipped Chairs have a fold-up seat, then several Chairs are pushed into each other so far that the chair columns in one come relatively small distance from each other. This can be, for example for space-saving storage of chairs or for moving be helpful to a whole group of chairs. It is desirable to that the chairs take defined positions to each other and this maintained.

Der Erfindung liegt daher die Aufgabe zugrunde, eine höhenverstellbare Stuhl-Säule so auszugestalten, dass das Standrohr und das Gehäuse der Gasfeder eine definierte Dreh-Winkel-Stellung zueinander einnehmen können und diese auch beibehalten.The invention is therefore based on the object, a height-adjustable Chair pillar in such a way that the standpipe and the housing of the Gas spring take a defined rotational angle position to each other can and maintain these too.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruches 1 gelöst. Durch die erfindungsgemäße Ausgestaltung wird erreicht, dass am Ende des vollständigen Ausfahrens des Gehäuses der Gasfeder aus dem Standrohr das Gehäuse und das Standrohr gegeneinander zumindest weitgehend unverdrehbar festgelegt werden. Sie nehmen also eine feste Drehstellung zueinander ein. Diese Feststellung kann durch Kraftschluss erfolgen; der Formschluss nach Anspruch 2 ist aber besonders vorteilhaft, weil zuverlässiger. Auch eine formschlüssige Verbindung kann so ausgelegt werden, dass sie sich nach Anspruch 3 bei Überschreiten eines vorgegebenen Drehmomentes löst. Eine vorteilhafte Ausgestaltung gibt hierzu Anspruch 4 wieder.This object is achieved by the features of the claim 1 solved. Due to the inventive design is achieved that on End of the complete extension of the housing of the gas spring from the Standpipe the housing and the standpipe against each other at least largely be set non-rotatably. So you take a fixed rotational position to one another. This determination can be made by adhesion; However, the positive connection according to claim 2 is particularly advantageous because more reliable. Even a positive connection can be designed be that they are in accordance with claim 3 when a predetermined Torque triggers. An advantageous embodiment gives this claim 4 again.

Eine besonders einfache Ausgestaltung ist Anspruch 5 zu entnehmen, wobei Anspruch 6 wiedergibt, wie ein besonders einfaches Herstellen einer formschlüssigen Verdrehsicherung erreichbar ist. Die Ansprüche 7 und 8 geben wieder, wie auch das Lösen bei Überlast erreichbar ist. Die Ansprüche 9 und 10 geben wieder, wie ein in Verdrehrichtung spielfreier Sitz erreichbar ist.A particularly simple embodiment is to claim 5, wherein Claim 6 reflects how a particularly simple production of a positive rotation can be achieved. Claims 7 and 8 give again, as well as the release in case of overload can be reached. The requirements 9 and 10 give again, as a play in the direction of rotation play-free reachable is.

Durch die Maßnahme nach Anspruch 11 wird erreicht, dass die Verdreh-Sicherung nur in einer ganz bestimmten vorgegebenen Stellung des Feststell-Elementes und des Feststell-Widerlagers ineinander greifen können.The measure according to claim 11 ensures that the anti-rotation device only in a very specific predetermined position of Locking element and the locking abutment can interlock.

Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels anhand der Zeichnung. Es zeigt

Fig. 1
eine Stuhl-Säule nach der Erfindung im Längsschnitt in zusammengefahrenem Zustand,
Fig. 2
die Stuhl-Säule nach Fig. 1 in vollständig ausgefahrenem Zustand und
Fig. 3
die Verdreh-Sicherung der Stuhl-Säule in perspektivischer Explosionsdarstellung.
Further advantages, features and details of the invention will become apparent from the following description of an embodiment with reference to the drawing. It shows
Fig. 1
a chair column according to the invention in longitudinal section in a contracted state,
Fig. 2
the chair column of FIG. 1 in the fully extended state and
Fig. 3
the twist-securing the chair column in a perspective exploded view.

Die in der Zeichnung dargestellte Stuhl-Säule weist ein Standrohr 1 und eine in diesem mittels einer Führungsbüchse 2 geführte, in Richtung einer gemeinsamen Mittel-Längs-Achse 3 verschiebbare, längenverstellbare Gasfeder 4 auf. Das Standrohr 1 weist an seinem unteren Ende einen Halte-Konus 5 zur Befestigung in einem üblichen Stuhl-Fußgestell auf.The chair column shown in the drawing has a standpipe 1 and a guided in this by means of a guide bush 2, in the direction of a common central longitudinal axis 3 sliding, length-adjustable Gas spring 4 on. The standpipe 1 has at its lower end a holding cone 5 for attachment in a conventional chair pedestal.

Die Gasfeder 4 weist ein im Wesentlichen zylindrisches Gehäuse 6 auf, das in der Führungsbüchse 2 geführt ist. Konzentrisch zur Achse 3 ist im Gehäuse 6 ein Innen-Rohr 7 angeordnet, zwischen dem und dem Gehäuse 6 ein Ringkanal 8 ausgebildet ist. An dem außerhalb des Standrohres 1 befindlichen oberen Ende des Gehäuses 6 ist in diesem ein Ventil 9 angeordnet, das mittels eines aus dem Gehäuse 6 herausragenden Betätigungsstiftes 10 betätigbar ist. Es dient zur wahlweisen Verbindung des Ringkanals 8 mit dem dem Ventil 9 benachbarten, im Innen-Rohr 7 ausgebildeten ersten Teil-Gehäuseraum 11.The gas spring 4 has a substantially cylindrical housing 6, the is guided in the guide bush 2. Concentric to the axis 3 is in the housing 6, an inner tube 7 is disposed between the housing 6 and the sixth an annular channel 8 is formed. At the outside of the standpipe 1 located upper end of the housing 6, a valve 9 is arranged in this the means of a protruding from the housing 6 actuating pin 10 is operable. It is used for selective connection of the annular channel. 8 with the valve 9 adjacent, formed in the inner tube 7 first Partial housing space 11.

Im Innen-Rohr 7 ist eine Kolbenstange 12 konzentrisch zur Achse 3 und in deren Richtung verschiebbar angeordnet, die an dem dem Ventil 9 entgegengesetzten, im Standrohr 1 befindlichen unteren Ende des Gehäuses 6 aus diesem herausgeführt ist. Sie ist in diesem Bereich mittels einer Führungs-Dichtungs-Einheit 13 gasdicht geführt. Am im Innen-Rohr 7 befindlichen Ende der Kolbenstange 12 ist an dieser ein Kolben 14 angebracht, der abgedichtet am Innen-Rohr 7 geführt ist. Er trennt den ersten Teil-Gehäuseraum 11 von einem zwischen dem Kolben 14 und der Führungs-Dichtungs-Einheit 13 ausgebildeten zweiten Teil-Gehäuseraum 15. An dem dem Ventil 9 benachbarten Ende des Gehäuses 6 ist an diesem ein sich konusförmig verjüngender Befestigungsabschnitt 16 ausgebildet, mittels dessen die Gasfeder 4 an einer entsprechenden Aufnahme an der Unterseite eines Stuhlsitzes, beispielsweise also einem Stuhlsitzträger, befestigbar ist. An ihrem unteren, außerhalb des Gehäuses 6 liegenden Ende ist die Kolbenstange 12 über ein Axial-Lager 17 am Boden 18 des Standrohres 1 abgestützt und dort mittels einer Befestigungs-Klammer 19 lösbar befestigt.In the inner tube 7 is a piston rod 12 concentric with the axis 3 and in their direction slidably arranged, which at the valve 9 opposite, located in the standpipe 1 lower end of the housing. 6 is led out of this. It is in this area by means of a guide-seal unit 13 gas-tight. Am located in the inner tube 7 End of the piston rod 12 is attached to this a piston 14, the sealed on the inner tube 7 is guided. He separates the first part-housing space 11 of one between the piston 14 and the guide-seal unit 13 trained second part housing space 15. An the valve 9 adjacent end of the housing 6 is at this a cone-shaped tapered attachment portion 16 is formed by means of the gas spring 4 on a corresponding receptacle on the underside a chair seat, for example, a chair seat support, can be fastened. At its lower end lying outside the housing 6 is the piston rod 12 supported via an axial bearing 17 on the bottom 18 of the standpipe 1 and there releasably secured by means of a fastening clip 19.

Der Ringkanal 8 und die Teil-Gehäuseräume 11 und 15 sind mit Gas unter verhältnismäßig hohem Druck und gegebenenfalls einer vorgegebenen Menge Öl gefüllt. Der zweite Teil-Gehäuseraum 15 ist an der Führungs-Dichtungs-Einheit 13 mittels eines Überström-Kanals 20 ständig mit dem Ringkanal 8 verbunden. Wenn das Ventil 9 durch Eindrücken des Betätigungsstiftes 10 geöffnet wird, dann wird bei ausreichender Entlastung des Gehäuses 6 die Kolbenstange ausgeschoben, d. h. das Gehäuse 6 wird aus dem Standrohr 1 nach oben herausgeschoben. Bei entsprechender Belastung des Gehäuses 6 wird dagegen das Gehäuse 6 nach unten in das Standrohr 1 eingeschoben und damit die Kolbenstange 12 in das Gehäuse 6 eingefahren. Beim Schließen des Ventils 9 durch Loslassen des Betätigungsstiftes 10 wird das Gehäuse 6 mit der Kolbenstange 12 über den im Gehäuse 6 herrschenden Druck gleichsam verriegelt, wobei bei einer Gasfüllung es sich um eine elastisch federnde Verriegelung und bei Vorhandensein einer überwiegenden Flüssigkeitsfüllung um eine weitgehend starre Verriegelung handelt. Der gesamte Aufbau und die Funktionsweise der Gasfeder 4 sind - soweit bisher beschrieben - allgemein bekannt, beispielsweise aus dem grundlegenden Patent DE 18 12 282 (entsprechend US 3,656,593). Entsprechend ist der grundsätzliche Aufbau und die Funktionsweise der Stuhlsäule aus dem Patent DE 19 31 021 bekannt.The annular channel 8 and the partial housing chambers 11 and 15 are under gas relatively high pressure and possibly a predetermined Filled amount of oil. The second part housing space 15 is on the guide-seal unit 13 by means of an overflow channel 20 constantly with the Ring channel 8 connected. When the valve 9 by pressing the actuating pin 10 is opened, then with sufficient relief of the Housing 6, the piston rod pushed out, d. H. the housing 6 is off pushed out of the standpipe 1 upwards. With appropriate load the housing 6, however, the housing 6 is down in the standpipe 1 inserted and thus the piston rod 12 retracted into the housing 6. When closing the valve 9 by releasing the actuating pin 10, the housing 6 with the piston rod 12 over the housing 6 prevailing pressure as it were locked, with a gas filling it is an elastically resilient locking and in presence a predominant fluid filling to a largely rigid locking is. The entire structure and operation of the gas spring 4 are - as far as described - well known, for example from the basic patent DE 18 12 282 (corresponding to US 3,656,593). Accordingly, the basic structure and operation of the Chair column from the patent DE 19 31 021 known.

Die Führungsbüchse 2 weist an ihrer Außenseite Längs-Rippen 21 auf, mittels derer sie sich an der Innenwand 22 des Standrohres 1 radial zur Achse 3 abstützt. Zwischen den Längs-Rippen 21 sind entsprechende Längs-Nuten 23 ausgebildet. An dem im Innenraum des Standrohres 1 befindlichen Ende der Führungsbüchse 2 ist ein Feststell-Widerlager 24 angebracht, das im Wesentlichen aus einem Ring 25 und an diesem ausgebildeten, parallel zur Achse 3 verlaufenden, in die Längs-Nuten 23 eingeschobenen Haltestegen 26 besteht. Mittels dieser Haltestege 26 ist das Widerlager 24 fest an der Führungsbüchse 2 befestigt, und zwar insbesondere drehfest. Es ist mit der ebenfalls aus schweißbarem Kunststoff bestehenden Führungsbüchse 2 durch Ultraschallschweißen oder dergleichen verschweißt und klemmend gehalten. Die Führungsbüchse 2 selber ist ausreichend drehfest, gegebenenfalls durch zusätzliche Sicherungsmittel, in das Standrohr 1 eingepresst.The guide bush 2 has on its outer side longitudinal ribs 21, by means of derer she on the inner wall 22 of the standpipe 1 radially to the axis 3 supported. Between the longitudinal ribs 21 are corresponding longitudinal grooves 23 trained. At the located in the interior of the standpipe 1 End of the guide bushing 2, a locking abutment 24 is attached, essentially consisting of a ring 25 and formed thereon, extending parallel to the axis 3, inserted into the longitudinal grooves 23 Holding webs 26 exists. By means of these retaining webs 26 is the abutment 24 fixedly secured to the guide sleeve 2, in particular rotationally fixed. It is made with the also made of weldable plastic Guide bush 2 welded by ultrasonic welding or the like and held in place. The guide bush 2 itself is sufficient rotatably, optionally by additional securing means, in the Standpipe 1 pressed.

An dem der Führungs-Dichtungs-Einheit 13 zugewandten, kolbenstangenaustrittswärtigem Ende des Gehäuses 6 ist an diesem ein Feststell-Element 27 angebracht, das ebenfalls im Wesentlichen in Form eines Ringes ausgebildet ist. Die Führungsbüchse 2, das Feststell-Widerlager 24 und das Feststell-Element 27 bilden eine Verdreh-Sicherung. Das Widerlager 24 und das Element 27 sind jeweils mit Ausschnitten 28, 29 versehen, wodurch wiederum Feststell-Stege 30, 31 gebildet werden. Die Ausschnitte 28, 29 und damit die Stege 30, 31 sind so ausgebildet, dass der Feststell-Steg 30 des Widerlagers 24 in den Ausschnitt 29 des Elements 27 und der Steg 31 des Elements 27 in den Ausschnitt 28 des Widerlagers 24 eingreift, und zwar spielfrei. Die Stege 30, 31 weisen jeweils Schrägflächen 32, 33 auf, die derart schräg zur Achse 3 angeordnet sind, dass die Ausschnitte 28, 29 sich jeweils zu ihrer offenen Seite hin erweitern. Die beim Eingriff des Elements 27 in das Widerlager 24 einander zugeordneten Schräg-Flächen 32 bzw. 33 weisen den gleichen Öffnungswinkel a zu einer achsparallelen Linie auf. Die Umfangserstreckung der Feststell-Stege 30, 31 ist derart bemessen, dass beim Eindringen des Feststell-Elements 27 in das Feststell-Widerlager 24 zwischen dem Boden 34 des Ausschnitts 28 des Widerlagers 24 und dem Feststell-Steg 31 des Feststell-Elements 27 und zwischen dem Boden 35 des Ausschnitts 29 des Feststell-Elements und dem Feststell-Steg 30 ein Spiel 36 bzw. 37 in Richtung der Achse 3 verbleibt. In diesem Fall liegen also die Schrägflächen 32, 33 jeweils fest aneinander, d. h. das Feststell-Element 27 hat kein tangentiales Spiel, also kein Drehspiel, gegenüber dem Widerlager 24.At the guide seal unit 13 facing, kolbenstangenaustrittswärtigem End of the housing 6 is at this a locking element 27 attached, which is also formed substantially in the form of a ring is. The guide bush 2, the locking abutment 24 and the Locking element 27 form a twist-lock. The abutment 24 and the element 27 are each provided with cutouts 28, 29, whereby in turn locking webs 30, 31 are formed. The cutouts 28, 29 and thus the webs 30, 31 are formed so that the locking web 30 of the abutment 24 in the cutout 29 of the element 27 and the Web 31 of the element 27 engages in the cutout 28 of the abutment 24, and free of play. The webs 30, 31 each have inclined surfaces 32, 33 on, which are arranged obliquely to the axis 3, that the cutouts 28, 29 each expand to their open side. The at the intervention of Elements 27 in the abutment 24 associated inclined surfaces 32 and 33 have the same opening angle a to an axis-parallel Line up. The circumferential extent of the locking webs 30, 31 is such dimensioned that upon penetration of the locking element 27 in the locking abutment 24 between the bottom 34 of the cutout 28 of the abutment 24 and the locking web 31 of the locking element 27 and between the Floor 35 of the section 29 of the locking element and the locking bridge 30 a game 36 or 37 remains in the direction of the axis 3. In this case So are the inclined surfaces 32, 33 each firmly against each other, d. H. the Locking element 27 has no tangential game, so no rotation, opposite the abutment 24th

Am Ende des vollständigen Ausfahrens des Gehäuses 6 der Gasfeder 4 aus dem Standrohr 1 kann durch entsprechendes Drehen des Gehäuses 6 der Gasfeder 4 bzw. des an ihr befestigten Sitzes gegenüber dem Standrohr 1 um die Achse 3 das Feststell-Element 27 in eine derartige Position gegenüber dem Feststell-Widerlager 24 gebracht werden, dass es in der geschilderten Weise in dieses eingreift und dadurch mit diesem drehfest verbunden wird. Der am Befestigungsabschnitt 16 befestigte Stuhlsitz kann sich daher in dieser Position gegenüber dem am Standrohr 1 befestigten Fußgestell nicht mehr verdrehen.At the end of the complete extension of the housing 6 of the gas spring 4 off the standpipe 1 can by appropriate rotation of the housing 6 of the Gas spring 4 and the seat attached to it relative to the standpipe. 1 about the axis 3, the locking element 27 in such a position opposite be brought to the locking abutment 24, that in the described Way in this engages and thereby rotatably connected with this becomes. The seat attached to the attachment portion 16 chair seat may Therefore, in this position relative to the base tube 1 attached to the pedestal do not twist anymore.

Der Öffnungswinkel a wird so gewählt, dass bei entsprechend großen, zwischen Gehäuse 6 und Standrohr 1 wirkenden Drehmomenten das Feststell-Element 27 und das Feststell-Widerlager 24 über die Schräg-Flächen 32, 33 in Richtung der Achse 3 auseinandergedrückt werden. Die Dimensionierung erfolgt über eine Abstimmung der in ausgefahrenem Zustand zwischen der Kolbenstange 12 und dem Gehäuse 6 aufgrund des inneren Gasdrucks bestehenden Ausschubkraft und dem mittleren Radius r der Schräg-Flächen 32, 33 und dem als zulässig angesehenen Drehmoment. Die Verdreh-Sicherung arbeitet also formschlüssig bis zum Erreichen des vorgegebenen Drehmomentes. Für den Öffnungswinkel a gilt: 5° ≤a ≤25° und bevorzugt 10° ≤a ≤15°.The opening angle a is chosen so that at correspondingly large, between Housing 6 and standpipe 1 acting torques the locking element 27 and the locking abutment 24 via the inclined surfaces 32, 33 are pressed apart in the direction of the axis 3. The sizing via a vote in the extended state between the piston rod 12 and the housing 6 due to the internal gas pressure existing extension force and the mean radius r of the inclined surfaces 32, 33 and the torque considered admissible. The twist-lock So works form-fitting until reaching the given Torque. For the opening angle a: 5 ° ≤a ≤25 ° and preferably 10 ° ≤a ≤15 °.

Claims (11)

Höhenverstellbare Stuhl-Säule mit einem Standrohr (1) mit einer Mittel-Längs-Achse (3), mit einer im Standrohr (1) koaxial zur Mittel-Längs-Achse (3) angeordneten Gasfeder (4), die ein im Standrohr (1) in Richtung der Mittel-Längs-Achse (3) bis in eine ausgefahrene Stellung verschiebbares Gehäuse (6) und eine im Standrohr (1) festgelegte Kolbenstange (12) aufweist und mit einer Verdreh-Sicherung (2, 24, 27), die in der ausgefahrenen Stellung das Gehäuse (6) mit dem Standrohr (1) gegen Verdrehen festlegt. Height-adjustable chair pillar with a standpipe (1) with a central longitudinal axis (3), with a in the standpipe (1) coaxial with the central longitudinal axis (3) arranged gas spring (4), the a in the standpipe (1) in the direction of the central longitudinal axis (3) displaceable into an extended position housing (6) and a fixed in the standpipe (1) piston rod (12) and with a twist-lock (2, 24, 27), which defines in the extended position, the housing (6) with the standpipe (1) against rotation. Höhenverstellbare Stuhl-Säule nach Anspruch 1, dadurch gekennzeichnet, dass die Verdreh-Sicherung (2, 24, 27) formschlüssig wirkend ausgebildet ist.Height-adjustable chair column according to claim 1, characterized in that the anti-rotation device (2, 24, 27) is formed positively acting. Höhenverstellbare Stuhl-Säule nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die Verdreh-Sicherung (2, 24, 27) derart ausgebildet ist, dass sie bei Überschreiten eines vorgegebenen Drehmoments zwischen dem Gehäuse (6) und dem Standrohr (1) sich löst.Height-adjustable chair pillar according to claim 1 or 2, characterized in that the anti-rotation device (2, 24, 27) is designed such that it dissolves when a predetermined torque between the housing (6) and the standpipe (1) is exceeded , Höhenverstellbare Stuhl-Säule nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Verdreh-Sicherung (2, 24, 27) ein mit dem Gehäuse (6) verbundenes Feststell-Element (27) und ein mit dem Standrohr (1) verbundenes Feststell-Widerlager (24) aufweist.Height-adjustable chair column according to one of claims 1 to 3, characterized in that the anti-rotation device (2, 24, 27) connected to the housing (6) locking element (27) and connected to the standpipe (1) Feststell-abutment (24). Höhenverstellbare Stuhl-Säule nach Anspruch 4, dadurch gekennzeichnet, dass das Feststell-Element (27) und/oder das Feststell-Widerlager (24) mindestens einen Ausschnitt (28, 29) und mindestens einen diesem zugeordneten und angepassten Feststell-Steg (30, 31) aufweisen.Height-adjustable chair pillar according to claim 4, characterized in that the locking element (27) and / or the locking abutment (24) at least one cutout (28, 29) and at least one assigned thereto and adapted locking web (30, 31). Höhenverstellbare Stuhl-Säule nach Anspruch 5, dadurch gekennzeichnet, dass der mindestens eine Ausschnitt (28, 29) und der mindestens eine Feststell-Steg (30, 31) einander angepasste Schräg-Flächen (32, 33) mit einem Öffnungswinkel (a) aufweisen.Height-adjustable chair column according to claim 5, characterized in that the at least one cutout (28, 29) and the at least one locking web (30, 31) adapted to each other inclined surfaces (32, 33) having an opening angle (a) , Höhenverstellbare Stuhl-Säule nach Anspruch 6, dadurch gekennzeichnet, dass jeder Ausschnitt (28, 29) und jeder Feststell-Steg (30, 31) einander angepasste Schräg-Flächen (32, 33) aufweisen.Height-adjustable chair column according to claim 6, characterized in that each cutout (28, 29) and each locking web (30, 31) adapted to each other inclined surfaces (32, 33). Höhenverstellbare Stuhl-Säule nach Anspruch 6 oder 7, dadurch gekennzeichnet, dass für den Öffnungswinkel (a) gilt 5° ≤a ≤25° und bevorzugt 10° ≤a ≤15°.Height-adjustable chair column according to claim 6 or 7, characterized in that for the opening angle (a) is 5 ° ≤a ≤25 ° and preferably 10 ° ≤a ≤15 °. Höhenverstellbare Stuhl-Säule nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, dass in der ausgefahrenen Stellung alle Schräg-Flächen (32, 33) dicht aneinander liegen.Height-adjustable chair column according to one of claims 6 to 8, characterized in that in the extended position all oblique surfaces (32, 33) are close to each other. Höhenverstellbare Stuhl-Säule nach Anspruch 9, dadurch gekennzeichnet, dass in der ausgefahrenen Stellung zwischen dem Boden (34, 35) eines Ausschnitts (28, 29) und dem in den Ausschnitt (28, 29) eingreifenden Feststell-Steg (30, 31) ein Spiel (36, 37) besteht.Height-adjustable chair column according to claim 9, characterized in that in the extended position between the bottom (34, 35) of a cutout (28, 29) and in the cutout (28, 29) engaging the locking web (30, 31) a game (36, 37) exists. Stuhl-Säule nach Anspruch 5 oder 6, dadurch gekennzeichnet, dass jedem Feststell-Steg (30, 31) nur ein angepasster Ausschnitt (28, 29) zugeordnet ist.Chair column according to claim 5 or 6, characterized in that each locking web (30, 31) is associated with only one adapted cutout (28, 29).
EP04029283A 2004-01-24 2004-12-10 Adjustable length column for chair Active EP1559349B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004003624 2004-01-24
DE102004003624A DE102004003624A1 (en) 2004-01-24 2004-01-24 Height-adjustable chair pillar

Publications (2)

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EP1559349A1 true EP1559349A1 (en) 2005-08-03
EP1559349B1 EP1559349B1 (en) 2006-06-28

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EP04029283A Active EP1559349B1 (en) 2004-01-24 2004-12-10 Adjustable length column for chair

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US (1) US7328875B2 (en)
EP (1) EP1559349B1 (en)
JP (1) JP2005205207A (en)
AT (1) ATE331449T1 (en)
CA (1) CA2490382A1 (en)
DE (2) DE102004003624A1 (en)

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EP3001932A1 (en) * 2014-09-30 2016-04-06 Innotec Motion GmbH Device for adjusting the height of a seat of an item of seating furniture
CN106051020A (en) * 2016-07-29 2016-10-26 常州市莱特气弹簧有限公司 Rear propping sleeve of pneumatic rod

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DE102009058647A1 (en) * 2009-12-16 2011-06-22 Stabilus GmbH, 56070 Slides column
JP5638143B2 (en) * 2011-08-31 2014-12-10 東　一夫 Telescopic device

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EP3001932A1 (en) * 2014-09-30 2016-04-06 Innotec Motion GmbH Device for adjusting the height of a seat of an item of seating furniture
CN106051020A (en) * 2016-07-29 2016-10-26 常州市莱特气弹簧有限公司 Rear propping sleeve of pneumatic rod

Also Published As

Publication number Publication date
JP2005205207A (en) 2005-08-04
US20050161559A1 (en) 2005-07-28
ATE331449T1 (en) 2006-07-15
US7328875B2 (en) 2008-02-12
EP1559349B1 (en) 2006-06-28
CA2490382A1 (en) 2005-07-24
DE502004000877D1 (en) 2006-08-10
DE102004003624A1 (en) 2005-08-11

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