EP0641532B1 - Length adjustable column for chairs, tables or the like - Google Patents

Length adjustable column for chairs, tables or the like Download PDF

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Publication number
EP0641532B1
EP0641532B1 EP19940110575 EP94110575A EP0641532B1 EP 0641532 B1 EP0641532 B1 EP 0641532B1 EP 19940110575 EP19940110575 EP 19940110575 EP 94110575 A EP94110575 A EP 94110575A EP 0641532 B1 EP0641532 B1 EP 0641532B1
Authority
EP
European Patent Office
Prior art keywords
adjustable column
longitudinally adjustable
standpipe
column according
cone section
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.)
Expired - Lifetime
Application number
EP19940110575
Other languages
German (de)
French (fr)
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EP0641532A1 (en
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
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Suspa Compart AG
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Filing date
Publication date
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Publication of EP0641532A1 publication Critical patent/EP0641532A1/en
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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
    • 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
    • A47C3/28—Chairs or stools with vertically-adjustable seats with clamps acting on vertical rods
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S248/00—Supports
    • Y10S248/911—Plural, selectively usable, support engaging means

Definitions

  • the invention relates to a length-adjustable column for chairs, tables or the like.
  • a base frame for a chair is known from DE 27 47 777 C2, which has a base frame and a length-adjustable column.
  • the column In relation to the central longitudinal axis of the column, the column is provided with projections projecting outwards and spaced apart from one another. Blind grooves in a cylindrical hub bore of the base frame are assigned to these projections.
  • a clamping wedge is also provided, by means of which the standpipe of the column can be pressed against the wall of the hub bore, so that the projections of the standpipe are pressed into the blind grooves.
  • the invention has for its object a length-adjustable column for chairs, tables or the like. to create that can be easily connected to a pedestal.
  • the base frame can be designed as is generally customary, i.e. it has a cone hub and foot struts extending outward therefrom.
  • the cone hub has the same design as is common for length-adjustable columns, in particular for chairs, but also for tables, in which the standpipe is provided with a cone section formed on the standpipe itself.
  • the cone section is not integrated in the standpipe, but instead a separate component in the form of a slotted sleeve or consisting of two half-shells.
  • the basic height adjustment of the length-adjustable column opposite the base frame can be changed over approximately the full length of the column's standpipe.
  • the chair column shown in the drawing has a standpipe 1, in which a length-adjustable gas spring 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 displaceably supported in the direction of the axis 3 in a guide bush 5, which is arranged at one end 6 of the standpipe 1, which is upper in the drawing.
  • This outer housing 4 of the gas spring 2 can be its housing itself or a protective tube surrounding it.
  • a piston rod 7 protrudes from the housing 4 of the gas spring and is supported in the direction of the axis 3 via an axial roller bearing 8 in relation to a base plate 9 of the standpipe 1.
  • the base plate 9 is located at the one end 6 opposite the other - shown in the drawing below - end 10 of the standpipe 1.
  • a pin 11 of the piston rod 7 passing through the axial rolling bearing 8 extends through an opening 12 of the opening 3 which is concentric with the axis 3 Base plate 9. It is secured against being pulled out against the underside of base plate 9 by means of a washer 13 and a spring retaining ring 14.
  • the diameter of the opening 12 is larger than the diameter of the pin 11.
  • the standpipe 1 is provided with a conical section 17 tapering slightly towards the end 10, by means of which the standpipe 1 is fastened in a corresponding cone hub of a base frame or the like. is possible.
  • the ring-shaped base plate 9 is supported on a cup-shaped rim 18 of the standpipe 1 which is rolled inwards in the region of its end 10.
  • This inwardly rolled edge is approximately semicircular in cross-section, i.e. it has approximately the cross-section of a semi-circular ring.
  • EP 0 366 889 A corresponding to US Pat. No. 4,969,619.
  • the cone section 17 is designed as an independent section which is not formed or shaped on the standpipe 1. It basically consists of a sleeve. In the embodiment according to FIGS. 1 and 2, this sleeve, which forms the cone section 17, consists of two identical half-shells 19, ie the sleeve is longitudinally divided in a plane which accommodates the central longitudinal axis 3. The two half-shells 19 are provided with a groove 20 which runs concentrically to the axis 3 and is approximately at half their length, that is to say in relation to the direction of the axis 3.
  • a protrusion is formed in the form of a bead 21 which extends concentrically with the axis 3 and projects outwards and engages in the grooves 20 when the two half-shells 19 with their Inner sides 22 are placed against the outer sides 23 of the standpipe 1, whereby they complement each other to form a sleeve forming the cone section 17. If the two half-shells 19 lie firmly against the standpipe 1, they cannot be displaced in the direction of the axis 3 relative to the standpipe 1.
  • the two half-shells 19 forming the cone section 17 taper - as already mentioned above - towards the lower end 10 of the standpipe 1; thus they have an outer conical surface 24, or the like for abutment in a corresponding conical hub of a base frame. is coming.
  • the half-shells 19 can be fixed to the standpipe 1 in pairs at different distances from the lower end 10 thereof.
  • the distance a between two adjacent beads 21 in the direction of the axis 3 is basically arbitrary; it only has to be greater than the distance b of the center of the groove 20 from the distant edge 25 of the cone section 17, so that the two half-shells 19 come into engagement with a bead 21 engaging in their grooves 20, from the adjacent bead or beads 21 but are free.
  • 1 also shows the cone angle c of the outer cone surface 24 relative to the axis 3.
  • FIGS. 3 and 4 differs from that according to FIGS. 1 and 2 in that the cone section 17 does not order from two half-shells, but rather a sleeve 26, which opens only on one side through a slot 27 running parallel to the axis 3 is. It has in the region of its two end edges 28, 29 groove-like, that is to say annular circumferential recesses 30, 31 whose center distance d in the direction of the axis 3 corresponds to the center distance a 'of two adjacent beads 21 on the standpipe 1'.
  • the embodiment according to FIG. 5 again has two half-shells 19 ′′, which are provided with a groove 20 and two groove-like recesses 30, 31 in the region of their edges 28, 29.
  • the center distance a ′′ of adjacent beads 21 is identical over the length of the standpipe 1 ′′.
  • it is smaller than in the exemplary embodiment according to FIGS. 3 and 4, namely only half as large. It corresponds to the center distance d ′′ of the central groove 20 from the recess 30 or the recess 31.
  • the slotted sleeve 26 must consist of material which is so elastic that it can be expanded to such an extent that it can be pushed over the beads 21.
  • the half-shells 19 can thus be made of die-cast zinc, die-cast aluminum, a very rigid plastic or the like.
  • the slotted sleeve 26 should consist of a sufficiently elastic, but very strong plastic, for which POM (acetal resin) or PP (polypropylene), which can optionally also be glass fiber reinforced, are suitable.
  • the projections which have been formed by the beads 21 in the embodiments according to FIGS. 1 to 6 can also be formed by annular deformations 34 - so-called passages - which are shown in FIG. 6.
  • These deformations 34 are formed in such a way that the wall 35 of the standpipe 1 or 1 'or 1''is pressed outward to form an opening 36, as a result of which an annular, that is to say an annular cylindrical deformation 34 is formed which forms a projection forms.
  • the dimensions of the grooves 20 and the recesses 30, 31 on the one hand and the beads 21 or deformations 34 on the other hand should be such that the cone sections 17 in the direction of the axis 3 are at least largely free of play on the standpipe 1, 1 ' , 1 '' are arranged.
  • Fig. 7 shows the application of the chair column 37 described in a work chair.
  • This has a base 39 supported on the floor by rollers 38, on which the chair column 37 is mounted so as to protrude upwards.
  • the upper end of the housing 4, from which the actuating pin 16 protrudes, is fastened to the underside of a seat 40, a pivotable actuating lever 41 being provided for actuating the actuating pin 16.
  • the chair also has a backrest 42 in the usual way.
  • the basic height of the seat 40 is predetermined in that the chair column 37 is connected to the foot frame 39 in the manner described at different heights.
  • the foot frame 39 has in its center in the usual way a cone hub 43 serving as a receptacle for the respective cone section 17, from which relatively strongly curved foot struts 44 extend downwards to the rollers 38, so that the cone hub 43 has a distance from the floor, which enables the described basic settings of the standpipe 1, 1 ', 1' 'to the base frame 39.
  • adjustable column can also be used for tables or the like. be used

Landscapes

  • Chairs Characterized By Structure (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Fluid-Damping Devices (AREA)
  • Tables And Desks Characterized By Structural Shape (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Description

Die Erfindung betrifft eine längenverstellbare Säule für Stühle, Tische o.dgl.The invention relates to a length-adjustable column for chairs, tables or the like.

Aus der DE 27 47 777 C2 ist ein Untergestell für einen Stuhl bekannt, der ein Fußgestell und eine längenverstellbare Säule aufweist. Die Säule ist - bezogen auf die Mittel-Längs-Achse der Säule - mit nach außen vorspringenden, im Abstand voneinander angeordneten Vorsprüngen versehen. Diesen Vorsprüngen sind Sacknuten in einer zylindrischen Nabenbohrung des Fußgestells zugeordnet. Im Fußgestell ist weiterhin ein Klemmkeil vorgesehen, mittels dessen das Standrohr der Säule gegen die Wandung der Nabenbohrung gedrückt werden kann, so daß die Vorsprünge des Standrohres in die Sacknuten gedrückt werden. Durch diese Maßnahmen kann die Stuhlsäule selbst in ihrer Höhe gegenüber dem durch eine Nabe und Stuhlfüße gebildeten Fußgestell verstellt werden. Die Veränderung der Höheneinstellung ist außerordentlich aufwendig. Es kommt hinzu, daß auch das Fußgestell selber speziell für den Eingriff der Vorsprünge durch Nuten und Sacknuten ausgebildet sein muß.A base frame for a chair is known from DE 27 47 777 C2, which has a base frame and a length-adjustable column. In relation to the central longitudinal axis of the column, the column is provided with projections projecting outwards and spaced apart from one another. Blind grooves in a cylindrical hub bore of the base frame are assigned to these projections. In the base frame a clamping wedge is also provided, by means of which the standpipe of the column can be pressed against the wall of the hub bore, so that the projections of the standpipe are pressed into the blind grooves. These measures allow the height of the chair column itself to be adjusted relative to the base frame formed by a hub and chair feet. Changing the height setting is extremely complex. In addition, the base frame itself must be specially designed for the engagement of the projections by grooves and blind grooves.

Aus der US-PS 2 722 970 und der CH-PS 100 436 sind weitere aufwendige Maßnahmen zur Höhenverstellung einer Stuhlsäule gegenüber einem Fußgestell bekannt.From US-PS 2 722 970 and CH-PS 100 436 further complex measures for height adjustment of a chair column relative to a foot frame are known.

Der Erfindung liegt die Aufgabe zugrunde, eine längenverstellbare Säule für Stühle, Tische o.dgl. zu schaffen, die in einfacher Weise mit einem Fußgestell verbindbar ist.The invention has for its object a length-adjustable column for chairs, tables or the like. to create that can be easily connected to a pedestal.

Diese Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruches 1 gelöst. Aufgrund der erfindungsgemäßen Maßnahmen kann das Fußgestell so ausgebildet werden, wie es allgemein üblich ist, d.h. es weist eine Konus-Nabe und sich von dieser nach außen erstreckende Fußstreben auf. Die Konus-Nabe hat die gleiche Ausgestaltung, wie es allgemein für längenverstellbare Säulen, insbesondere für Stühle, aber auch für Tische, üblich ist, bei denen das Standrohr mit einem am Standrohr selber ausgebildeten KonusAbschnitt versehen ist. Der Konus-Abschnitt ist nicht in das Standrohr integriert, sondern gegenüber diesem ein gesondertes Bauteil in Form einer geschlitzten oder aus zwei Halbschalen bestehenden Hülse. Die Grund-Höheneinstellung der längenverstellbaren Säule gegenüber dem Fußgestell kann über angenähert die volle Länge des Standrohres der Säule verändert werden.This object is achieved by the features of claim 1. On the basis of the measures according to the invention, the base frame can be designed as is generally customary, i.e. it has a cone hub and foot struts extending outward therefrom. The cone hub has the same design as is common for length-adjustable columns, in particular for chairs, but also for tables, in which the standpipe is provided with a cone section formed on the standpipe itself. The cone section is not integrated in the standpipe, but instead a separate component in the form of a slotted sleeve or consisting of two half-shells. The basic height adjustment of the length-adjustable column opposite the base frame can be changed over approximately the full length of the column's standpipe.

Weitere zum Teil erfinderische Ausgestaltungen ergeben sich aus den Unteransprüchen.Further partially inventive configurations result from the subclaims.

Weitere Merkmale, Vorteile und Einzelheiten der Erfindung ergeben sich aus der Beschreibung von Ausführungsbeispielen der Erfindung anhand der Zeichnung. Es zeigt

Fig. 1
eine Längsansicht einer teilweise aufgebrochen dargestellten Stuhl-Säule,
Fig. 2
eine Draufsicht auf die Säule nach Fig. 1,
Fig. 3
eine Längsansicht einer teilweise aufgebrochen dargestellten zweiten Ausführungsform einer Stuhl-Säule,
Fig. 4
eine Draufsicht auf die Stuhl-Säule nach Fig. 3,
Fig. 5
eine Längsansicht einer teilweise aufgebrochen dargestellten dritten Ausführungsform einer Stuhl-Säule,
Fig. 6
eine Detail-Darstellung eines Vorsprungs im Schnitt und
Fig. 7
einen Stuhl mit einer Stuhl-Säule.
Further features, advantages and details of the invention result from the description of exemplary embodiments of the invention with reference to the drawing. It shows
Fig. 1
2 shows a longitudinal view of a chair column shown partially broken away,
Fig. 2
2 shows a top view of the column according to FIG. 1,
Fig. 3
2 shows a longitudinal view of a second embodiment of a chair column shown partially broken away,
Fig. 4
3 shows a top view of the chair column according to FIG. 3,
Fig. 5
2 shows a longitudinal view of a third embodiment of a chair column, shown partially broken away,
Fig. 6
a detailed representation of a projection in section and
Fig. 7
a chair with a chair column.

Die in der Zeichnung dargestellte Stuhl-Säule weist ein Standrohr 1 auf, in dem eine längenverstellbare Gasfeder als pneumatisches oder hydropneumatisches Kolben-Zylinder-Verstellelement angeordnet ist. Das Standrohr 1 und die Gasfeder 2 haben eine gemeinsame Mittel-Längs-Achse 3.The chair column shown in the drawing has a standpipe 1, in which a length-adjustable gas spring 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.

Ein äußeres Gehäuse 4 der Gasfeder 2 ist in Richtung der Achse 3 verschiebbar in einer Führungsbüchse 5 abgestützt, die an einem - in der Zeichnung oberen - Ende 6 des Standrohres 1 angeordnet ist. Bei diesem äußeren Gehäuse 4 der Gasfeder 2 kann es sich um deren Gehäuse selber handeln oder um ein dieses nach außen umgebendes Schutzrohr.An outer housing 4 of the gas spring 2 is displaceably supported in the direction of the axis 3 in a guide bush 5, which is arranged at one end 6 of the standpipe 1, which is upper in the drawing. This outer housing 4 of the gas spring 2 can be its housing itself or a protective tube surrounding it.

Aus dem Gehäuse 4 der Gasfeder ragt eine Kolbenstange 7 heraus, die über ein Axial-Wälzlager 8 gegenüber einer Bodenplatte 9 des Standrohres 1 in Richtung der Achse 3 abgestützt ist. Die Bodenplatte 9 befindet sich an dem dem einen Ende 6 entgegengesetzten anderen - in der Zeichnung unten dargestellten - Ende 10 des Standrohres 1. Ein das Axial-Wälzlager 8 durchsetzender Zapfen 11 der Kolbenstange 7 erstreckt sich durch eine zur Achse 3 konzentrisch ausgebildete Öffnung 12 der Bodenplatte 9. Er ist gegen die Unterseite der Bodenplatte 9 mittels einer Beilagscheibe 13 und eines Feder-Sicherungsrings 14 gegen ein Herausziehen gesichert. Der Durchmesser der Öffnung 12 ist größer als der Durchmesser des Zapfens 11. Durch diese geschilderte Befestigung ist die Gasfeder 2 gegenüber dem Standrohr 1 drehbar. Sie ist aufgrund des radialen Spiels 15 zwischen Zapfen 11 und der Öffnung 12 in geringem Maße gegenüber dem Standrohr 1 neigbar, also verkantungsfrei in der Führungsbüchse 5 geführt. Sie ist schließlich mit ihrer Kolbenstange 7 in Richtung der Achse 3 gegenüber dem Standrohr 1 festgelegt, so daß bei Längenverstellungen der Gasfeder 2 durch Betätigung eines Betätigungsstiftes 16 das Gehäuse 4 der Gasfeder 2 aus dem Standrohr 1 herausgefahren oder in dieses hineingeschoben wird. Der Betätigungsstift 16 befindet sich an dem der Kolbenstange 7 entgegengesetzten Ende des Gehäuses 4 der Gasfeder 2. Hier wird auch ein Stuhlsitz oder eine Tischplatte befestigt.A piston rod 7 protrudes from the housing 4 of the gas spring and is supported in the direction of the axis 3 via an axial roller bearing 8 in relation to a base plate 9 of the standpipe 1. The base plate 9 is located at the one end 6 opposite the other - shown in the drawing below - end 10 of the standpipe 1. A pin 11 of the piston rod 7 passing through the axial rolling bearing 8 extends through an opening 12 of the opening 3 which is concentric with the axis 3 Base plate 9. It is secured against being pulled out against the underside of base plate 9 by means of a washer 13 and a spring retaining ring 14. The diameter of the opening 12 is larger than the diameter of the pin 11. The fastening described allows the gas spring 2 to be rotated relative to the standpipe 1. Due to the radial play 15 between the pin 11 and the opening 12, it can be inclined to a small extent with respect to the standpipe 1, that is to say it is guided in the guide bush 5 without tilting. Finally, it is fixed with its piston rod 7 in the direction of the axis 3 relative to the standpipe 1, so that when the gas spring 2 is adjusted in length, the housing 4 of the gas spring 2 is moved out of the standpipe 1 or pushed into it by actuating an actuating pin 16. The actuating pin 16 is located on the end of the housing 4 of the gas spring 2 opposite the piston rod 7. A chair seat or a table top is also attached here.

Das Standrohr 1 ist mit einem sich zum Ende 10 hin leicht konisch verjüngenden Konus-Abschnitt 17 versehen, mittels dessen eine Befestigung des Standrohres 1 in einer entsprechenden Konus- Nabe eines Fußgestells o.dgl. möglich ist.The standpipe 1 is provided with a conical section 17 tapering slightly towards the end 10, by means of which the standpipe 1 is fastened in a corresponding cone hub of a base frame or the like. is possible.

Soweit die primär als Stuhl-Säule, aber auch als Säule für Tische o. dgl. dienende Säule bis hierher beschrieben ist, ist sie allgemein bekannt, handelsüblich und beispielsweise in der DE-PS 19 31 012 (entsprechend US-PS 3 711 054) oder der EP-PS 0 133 524 beschrieben und dargestellt.As far as the column serving primarily as a chair column, but also as a column for tables or the like has been described so far, it is generally known, commercially available and for example in DE-PS 19 31 012 (corresponding to US Pat. No. 3,711,054) or EP-PS 0 133 524 described and shown.

Die ringscheibenförmige Bodenplatte 9 stützt sich auf einen topfförmig nach innen gerollten Rand 18 des Standrohres 1 im Bereich von dessen Ende 10 ab. Dieser nach innen gerollte Rand weist im Querschnitt etwa eine Halbkreisform auf, d.h. er hat etwa den Querschnitt eines Halb-Kreisrings. Diese Ausgestaltung ist aus der EP 0 366 889 A (entsprechend US-PS 4 969 619) bekannt.The ring-shaped base plate 9 is supported on a cup-shaped rim 18 of the standpipe 1 which is rolled inwards in the region of its end 10. This inwardly rolled edge is approximately semicircular in cross-section, i.e. it has approximately the cross-section of a semi-circular ring. This embodiment is known from EP 0 366 889 A (corresponding to US Pat. No. 4,969,619).

Neu ist die Ausgestaltung des Standrohres 1 zusammen mit dem Konus-Abschnitt 17, die nachfolgend im einzelnen beschrieben wird.What is new is the design of the standpipe 1 together with the cone section 17, which is described in detail below.

Der Konus-Abschnitt 17 ist als eigenständiger, nicht am Standrohr 1 ausgebildeter oder ausgeformter Abschnitt ausgestaltet. Er besteht im Grundsatz aus einer Hülse. Bei der Ausgestaltung nach den Fig. 1 und 2 besteht diese den Konus-Abschnitt 17 bildende Hülse aus zwei identischen Halbschalen 19, d.h. die Hülse ist in einer die Mittel-Längs-Achse 3 aufnehmenden Ebene längsgeteilt. Die beiden Halbschalen 19 sind etwa auf ihrer halben Länge, d.h. bezogen auf die Richtung der Achse 3 etwa in ihrer Mitte mit einer konzentrisch zur Achse 3 umlaufenden Nut 20 versehen. Am Standrohr 1 ist ein Vorsprung in Form einer konzentrisch zur Achse 3 umlaufenden, nach außen vorspringenden Sicke 21 ausgebildet, der in die Nuten 20 eingreift, wenn die beiden Halbschalen 19 mit ihren Innenseiten 22 gegen die Außenseiten 23 des Standrohres 1 gelegt werden, wobei sie sich zu einer den Konus-Abschnitt 17 bildenden Hülse ergänzen. Wenn die beiden Halbschalen 19 fest am Standrohr 1 anliegen, können sie nicht in Richtung der Achse 3 relativ zum Standrohr 1 verschoben werden.The cone section 17 is designed as an independent section which is not formed or shaped on the standpipe 1. It basically consists of a sleeve. In the embodiment according to FIGS. 1 and 2, this sleeve, which forms the cone section 17, consists of two identical half-shells 19, ie the sleeve is longitudinally divided in a plane which accommodates the central longitudinal axis 3. The two half-shells 19 are provided with a groove 20 which runs concentrically to the axis 3 and is approximately at half their length, that is to say in relation to the direction of the axis 3. On the standpipe 1, a protrusion is formed in the form of a bead 21 which extends concentrically with the axis 3 and projects outwards and engages in the grooves 20 when the two half-shells 19 with their Inner sides 22 are placed against the outer sides 23 of the standpipe 1, whereby they complement each other to form a sleeve forming the cone section 17. If the two half-shells 19 lie firmly against the standpipe 1, they cannot be displaced in the direction of the axis 3 relative to the standpipe 1.

Die beiden den Konus-Abschnitt 17 bildenden Halbschalen 19 verjüngen sich - wie oben bereits angesprochen wurde - zum unteren Ende 10 des Standrohres 1 hin; sie weisen also eine äußere Konusfläche 24 auf, die zur Anlage in einer entsprechenden Konus-Nabe eines Fußgestells o.dgl. kommt.The two half-shells 19 forming the cone section 17 taper - as already mentioned above - towards the lower end 10 of the standpipe 1; thus they have an outer conical surface 24, or the like for abutment in a corresponding conical hub of a base frame. is coming.

Da am Standrohr 1 mehrere Vorsprünge in Form jeweils einer umlaufenden Sicke 21 ausgebildet sind, können die Halbschalen 19 jeweils in unterschiedlichen Abständen vom unteren Ende 10 des Standrohres 1 paarweise an diesem festgelegt werden. Der Abstand a zweier benachbarter Sicken 21 in Richtung der Achse 3 ist grundsätzlich beliebig; er muß nur größer sein als der Abstand b der Mitte der Nut 20 vom weiter entfernt liegenden Rand 25 des Konus-Abschnitts 17, damit die beiden Halbschalen 19 mit einer in ihre Nuten 20 eingreifenden Sicke 21 in Eingriff kommen, von der oder den benachbarten Sicken 21 aber frei sind. Je nach der Zahl der Sicken 21 und deren Abstand a voneinander sind mehr oder weniger große Abstufungen in der Höhenverstellung des Standrohres 1 relativ zu einem Fußgestell möglich. Aus Fig. 1 ist auch der Konuswinkel c der äußeren Konusfläche 24 relativ zur Achse 3 erkennbar.Since a plurality of projections are each formed on the standpipe 1 in the form of a circumferential bead 21, the half-shells 19 can be fixed to the standpipe 1 in pairs at different distances from the lower end 10 thereof. The distance a between two adjacent beads 21 in the direction of the axis 3 is basically arbitrary; it only has to be greater than the distance b of the center of the groove 20 from the distant edge 25 of the cone section 17, so that the two half-shells 19 come into engagement with a bead 21 engaging in their grooves 20, from the adjacent bead or beads 21 but are free. Depending on the number of beads 21 and their distance a from each other, more or less large gradations in the height adjustment of the standpipe 1 relative to a base frame are possible. 1 also shows the cone angle c of the outer cone surface 24 relative to the axis 3.

Die Ausführung nach den Figuren 3 und 4 unterscheidet sich von der nach den Figuren 1 und 2 dadurch, daß der Konus-Abschnitt 17 nicht aus zwei Halbschalen, sondern einer Hülse 26 bestellt, die nur einseitig durch einen parallel zur Achse 3 verlaufenden Schlitz 27 geöffnet ist. Sie weist im Bereich ihrer beiden stirnseitigen Ränder 28, 29 nutartige, also ringförmig umlaufende Ausnehmungen 30, 31 auf, deren Mittenabstand d in Richtung der Achse 3 dem Mittenabstand a' zweier benachbarter Sicken 21 am Standrohr 1' entspricht.The embodiment according to FIGS. 3 and 4 differs from that according to FIGS. 1 and 2 in that the cone section 17 does not order from two half-shells, but rather a sleeve 26, which opens only on one side through a slot 27 running parallel to the axis 3 is. It has in the region of its two end edges 28, 29 groove-like, that is to say annular circumferential recesses 30, 31 whose center distance d in the direction of the axis 3 corresponds to the center distance a 'of two adjacent beads 21 on the standpipe 1'.

Während bei der Ausführung nach den Figuren 1 und 2 der Konus-Abschnitt 17 bei fest an der Außenseite 23 anliegenden Halbschalen 19 axial zum Standrohr 1 unverschiebbar ist, weil die Seitenwände 32, 33 der Nuten 20 ein Verschieben verhindern, wird bei der Ausführungsform nach den Figuren 3 und 4 dieses Verschieben dadurch verhindert, daß jeweils eine Seitenwand 32' und 33' in einer Ausnehmung 30 bzw. 31 ausgebildet ist.While in the embodiment according to FIGS. 1 and 2, the cone section 17 cannot be displaced axially to the standpipe 1 when the half-shells 19 are firmly attached to the outside 23, because the side walls 32, 33 of the grooves 20 prevent displacement, in the embodiment according to FIGS Figures 3 and 4 prevent this shifting in that one side wall 32 'and 33' is formed in a recess 30 and 31, respectively.

Die Ausführungsform nach Fig. 5 weist wiederum zwei Halbschalen 19'' auf, die mit einer Nut 20 und zwei nutartigen Ausnehmungen 30, 31 im Bereich ihrer Ränder 28, 29 versehen sind. Gleichermaßen wie bei der Ausführungsform nach den Figuren 3 und 4 ist der Mittenabstand a'' jeweils benachbarter Sicken 21 über die Länge des Standrohres 1'' identisch. Er ist aber kleiner als bei dem Ausführungsbeispiel nach den Figuren 3 und 4, nämlich nur halb so groß. Er entspricht dem Mittenabstand d'' der mittleren Nut 20 von der Ausnehmung 30 bzw. der Ausnehmung 31. Mit dieser Ausgestaltung ist also eine feiner gestufte Höhenverstellung des Konus-Abschnitts 17 relativ zum Standrohr 1'' möglich.The embodiment according to FIG. 5 again has two half-shells 19 ″, which are provided with a groove 20 and two groove-like recesses 30, 31 in the region of their edges 28, 29. In the same way as in the embodiment according to FIGS. 3 and 4, the center distance a ″ of adjacent beads 21 is identical over the length of the standpipe 1 ″. However, it is smaller than in the exemplary embodiment according to FIGS. 3 and 4, namely only half as large. It corresponds to the center distance d ″ of the central groove 20 from the recess 30 or the recess 31. With this configuration, a finer graded height adjustment of the cone section 17 relative to the standpipe 1 ″ is possible.

Während die Halbschalen 19, 19'' aus relativ starrem Material bestehen können, muß die geschlitzte Hülse 26 aus Material bestehen, das so elastisch ist, daß sie so weit aufgeweitet werden kann, daß sie über die Sicken 21 hinweggeschoben werden kann. Die Halbschalen 19 können also aus Zink-Druckguß, Aluminium-Druckguß, einem sehr starren Kunststoff o.dgl. bestehen, während die geschlitzte Hülse 26 aus einem ausreichend elastischen, aber sehr festen Kunststoff bestehen sollte, wofür POM (Acetalharz) oder PP (Polypropylen), die gegebenenfalls auch glasfaserverstärkt sein können, in Betracht kommen.While the half-shells 19, 19 '' can consist of relatively rigid material, the slotted sleeve 26 must consist of material which is so elastic that it can be expanded to such an extent that it can be pushed over the beads 21. The half-shells 19 can thus be made of die-cast zinc, die-cast aluminum, a very rigid plastic or the like. consist, while the slotted sleeve 26 should consist of a sufficiently elastic, but very strong plastic, for which POM (acetal resin) or PP (polypropylene), which can optionally also be glass fiber reinforced, are suitable.

Die Vorsprünge, die bei den Ausführungsformen nach den Figuren 1 bis 6 durch die Sicken 21 gebildet worden sind, können auch durch ringförmige Verformungen 34 - sogenannte Durchzüge - gebildet werden, die in Fig. 6 dargestellt sind. Diese Verformungen 34 sind in der Weise gebildet, daß die Wand 35 des Standrohres 1 bzw. 1' bzw. 1'' unter Bildung einer Durchbrechung 36 nach außen herausgedrückt wird, wodurch sich eine ringförmige, also ringzylindrische Verformung 34 bildet, die einen Vorsprung bildet. Es sind jeweils mehrere, vorzugsweise sechs, derartige Verformungen 34 auf einem um die Achse 3 konzentrischen Kreis am Standrohr 1, 1', 1'' ausgebildet, die bündig in die Nut 20 bzw. die Ausnehmungen 30, 31 eingreifen. Bei allen dargestellten Ausführungen sollten die Abmessungen der Nuten 20 und der Ausnehmungen 30, 31 einerseits und der Sicken 21 bzw. Verformungen 34 andererseits so sein, daß die Konus-Abschnitte 17 in Richtung der Achse 3 zumindest weitgehend spielfrei auf dem Standrohr 1, 1', 1'' angeordnet sind.The projections which have been formed by the beads 21 in the embodiments according to FIGS. 1 to 6 can also be formed by annular deformations 34 - so-called passages - which are shown in FIG. 6. These deformations 34 are formed in such a way that the wall 35 of the standpipe 1 or 1 'or 1''is pressed outward to form an opening 36, as a result of which an annular, that is to say an annular cylindrical deformation 34 is formed which forms a projection forms. There are several, preferably six, such deformations 34 formed on a circle concentric about the axis 3 on the standpipe 1, 1 ', 1'', which engage flush in the groove 20 or the recesses 30, 31. In all the embodiments shown, the dimensions of the grooves 20 and the recesses 30, 31 on the one hand and the beads 21 or deformations 34 on the other hand should be such that the cone sections 17 in the direction of the axis 3 are at least largely free of play on the standpipe 1, 1 ' , 1 '' are arranged.

Fig. 7 zeigt die Anwendung der geschilderten Stuhl-Säule 37 in einem Arbeits-Stuhl. Dieser weist ein über Rollen 38 auf dem Boden abgestütztes Fußgestell 39 auf, auf dem die Stuhlsäule 37 nach oben ragend angebracht ist. Das obere Ende des Gehäuses 4, aus dem der Betätigungsstift 16 herausragt, ist an der Unterseite eines Sitzes 40 befestigt, wobei ein verschwenkbarer Betätigungshebel 41 zur Betätigung des Betätigungsstiftes 16 vorgesehen ist. Der Stuhl weist weiterhin in üblicher Weise eine Rückenlehne 42 auf. Bei einer Betätigung des Betätigungsstiftes 16 eines in der Gasfeder 2 befindlichen Ventils mittels des Betätigungshebels 41 kann die Gasfeder 2 in üblicher Weise in ihrer Länge verstellt werden, wodurch der Sitz 40 mit Rückenlehne 42 in der Höhe verstellt wird.Fig. 7 shows the application of the chair column 37 described in a work chair. This has a base 39 supported on the floor by rollers 38, on which the chair column 37 is mounted so as to protrude upwards. The upper end of the housing 4, from which the actuating pin 16 protrudes, is fastened to the underside of a seat 40, a pivotable actuating lever 41 being provided for actuating the actuating pin 16. The chair also has a backrest 42 in the usual way. When the actuating pin 16 of a valve in the gas spring 2 is actuated by means of the actuating lever 41, the length of the gas spring 2 can be adjusted in the usual way, as a result of which the height of the seat 40 with the backrest 42 is adjusted.

Die Grundhöhe des Sitzes 40 wird dadurch vorgegeben, daß die Stuhl-Säule 37 in der geschilderten Weise in unterschiedlicher Höhenlage mit dem Fußgestell 39 verbunden wird. Das Fußgestell 39 weist hierzu in seinem Zentrum in üblicher Weise eine als Aufnahme für den jeweiligen Konus-Abschnitt 17 dienende Konus-Nabe 43 auf, von der sich relativ stark gekrümmte Fußstreben 44 nach unten zu den Rollen 38 erstrecken, so daß die Konus-Nabe 43 einen Abstand vom Boden aufweist, der die geschilderten Grundeinstellungen des Standrohres 1, 1', 1'' zum Fußgestell 39 ermöglicht.The basic height of the seat 40 is predetermined in that the chair column 37 is connected to the foot frame 39 in the manner described at different heights. For this purpose, the foot frame 39 has in its center in the usual way a cone hub 43 serving as a receptacle for the respective cone section 17, from which relatively strongly curved foot struts 44 extend downwards to the rollers 38, so that the cone hub 43 has a distance from the floor, which enables the described basic settings of the standpipe 1, 1 ', 1' 'to the base frame 39.

Selbstverständlich kann die längenverstellbare Säule auch für Tische o.dgl. eingesetzt werdenOf course, the adjustable column can also be used for tables or the like. be used

Claims (9)

  1. A longitudinally adjustable column (37) for chairs, tables or the like, characterized by
    - an upright tube (1, 1', 1'') with a central longitudinal axis (3), which - related to the axis (3) - comprises at least two projections (21, 34) disposed at a distance from each other and protruding outward from its external side (23),
    - a pneumatic or hydropneumatic length-adjusting element (2) arranged concentrically of the central longitudinal axis (3) in the upright tube (1, 1', 1''), and
    - a sleeve-like cone section (17) with a external conical surface (24) to be inserted into a taper adapter (43) of a pedestal (39), with a internal side (22) for abutment on the external side (23) of the upright tube (1, 1', 1''), and with at least one recess (20, 30, 31) to fit over one of the projections (21, 34).
  2. A longitudinally adjustable column according to claim 1, characterized in that the cone section (17) is formed as a sleeve (26) divided by a slot (27).
  3. A longitudinally adjustable column according to claim 1, characterized in that the cone section (17) consists of two half shells (19, 19'').
  4. A longitudinally adjustable column according to one of claims 1 to 3, characterized in that the recess is formed as a groove (20).
  5. A longitudinally adjustable column according to one of claims 1 to 4, characterized in that the recess is in the form of a groove and open towards a rim (28, 29) on the side of the end of the cone section (17) - related to the axis (3).
  6. A longitudinally adjustable column according to one of claims 1 to 5, characterized in that the cone section (17) - related to the central longitudinal axis (3) - is arranged on the upright tube (1, 1', 1'') approximately without play.
  7. A longitudinally adjustable column according to one of claims 1 to 6, characterized in that a projection is formed by a crimp (21).
  8. A longitudinally adjustable column according to one of claims 1 to 7, characterized in that a projection is formed by a annular deformation (34).
  9. A longitudinally adjustable column according to claim 2, characterized in that the sleeve (26) is made of hard elastic material.
EP19940110575 1993-09-02 1994-07-07 Length adjustable column for chairs, tables or the like Expired - Lifetime EP0641532B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4329611 1993-09-02
DE19934329611 DE4329611A1 (en) 1993-09-02 1993-09-02 Adjustable column for chairs, tables or the like.

Publications (2)

Publication Number Publication Date
EP0641532A1 EP0641532A1 (en) 1995-03-08
EP0641532B1 true EP0641532B1 (en) 1997-03-05

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ID=6496648

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940110575 Expired - Lifetime EP0641532B1 (en) 1993-09-02 1994-07-07 Length adjustable column for chairs, tables or the like

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US (1) US5462248A (en)
EP (1) EP0641532B1 (en)
JP (1) JP3520116B2 (en)
DE (2) DE4329611A1 (en)
ES (1) ES2101395T3 (en)

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Also Published As

Publication number Publication date
DE59401899D1 (en) 1997-04-10
JPH07148049A (en) 1995-06-13
JP3520116B2 (en) 2004-04-19
US5462248A (en) 1995-10-31
EP0641532A1 (en) 1995-03-08
DE4329611A1 (en) 1995-03-09
ES2101395T3 (en) 1997-07-01

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