EP0105180B1 - Working-chair - Google Patents

Working-chair Download PDF

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Publication number
EP0105180B1
EP0105180B1 EP83108406A EP83108406A EP0105180B1 EP 0105180 B1 EP0105180 B1 EP 0105180B1 EP 83108406 A EP83108406 A EP 83108406A EP 83108406 A EP83108406 A EP 83108406A EP 0105180 B1 EP0105180 B1 EP 0105180B1
Authority
EP
European Patent Office
Prior art keywords
seat
backrest
seating furniture
jointedly
seat portion
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
Application number
EP83108406A
Other languages
German (de)
French (fr)
Other versions
EP0105180A2 (en
EP0105180A3 (en
Inventor
Herbert Ludwig Wiesmann
Heinz Peter Suhr
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.)
Wilkhahn Wilkening and Hahne GmbH and Co KG
Original Assignee
Wilkhahn Wilkening and Hahne GmbH and Co KG
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 Wilkhahn Wilkening and Hahne GmbH and Co KG filed Critical Wilkhahn Wilkening and Hahne GmbH and Co KG
Priority to AT83108406T priority Critical patent/ATE24270T1/en
Publication of EP0105180A2 publication Critical patent/EP0105180A2/en
Publication of EP0105180A3 publication Critical patent/EP0105180A3/en
Application granted granted Critical
Publication of EP0105180B1 publication Critical patent/EP0105180B1/en
Expired legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/031Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/031Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03205Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47CCHAIRS; SOFAS; BEDS
    • A47C1/00Chairs adapted for special purposes
    • A47C1/02Reclining or easy chairs
    • A47C1/031Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs

Definitions

  • the invention relates to a work seating, with a seat, with an articulated or flexible backrest, with a spring loading the backrest in the sense of a steep position and with a base in soft a horizontal, front bearing tube on which the seat in the area its front edge is supported in an articulated manner, and a rear, horizontal support shaft lying at a distance below the seat is mounted, with which at least one support lever which supports the backrest at about the lumbar height is rigidly connected and which has at least one radially projecting cam.
  • Such work seating is known from DE-A-3 036 993.
  • the seat inclination and the back inclination are automatically changed in a certain relationship between a steep seated posture and a comfortable backward position by shifting the weight.
  • locking devices equipped with so-called gas springs are already known, but gas springs are a relatively fault-prone component that cannot be replaced by the user in the event of damage.
  • purely mechanical locking devices a pin-shaped locking member is inserted into a corresponding locking opening, which is associated with annoying handling, especially since the actuating member can often only be gripped when sitting in a dislocated posture.
  • the known locking devices are often bulky, so that they affect the appearance of the seating.
  • the invention has for its object to provide the generic work seating with a locking device for the seat backrest inclination which is easy to grasp while sitting and is concealed within the already existing chair mechanism, so that it does not affect the appearance of the seating.
  • a locking lever is articulated on the underframe, which is articulated by a transmission member to an actuating tube which passes through the front bearing tube and can be rotated by an actuating lever, and which can be pivoted as a lock into the movement path of the cam.
  • the power transmission then takes place by means of the actuating tube which surrounds the front bearing tube, which is already present, and which therefore does not appear or hardly appears.
  • the further power transmission takes place via a transmission member which, like the locking lever, can be made relatively small, so that these parts can be accommodated more or less concealed within the part of the underframe which carries the front bearing tube and its rear support shaft.
  • the locking device according to the invention can be used with particular advantage in a piece of work seating in which the support shaft has two cams which project downward in parallel and are each articulated on the fork joint head of a control rod enclosed by a compression spring screw.
  • the locking lever is mounted centrally between the two helical compression springs on a box-shaped housing part of the base frame carries articulated-headed locking arms which enclose the foot-side support device of the housing part between them.
  • a base frame 1 which has a column and a support arm in the form of a flat, wide protruding from the upper, approximately below the center of the column end to the front
  • Has housing part 2 which carries at its front end a horizontal, front bearing tube 3, on which the seat 4 is articulated in its front region.
  • a support shaft 5 is rotatably mounted at a distance below the seat 4, at the two ends of which a support lever 6 is rigidly fastened, the other end of which is approximately attached to a backrest 7 of the seating are articulated at lumbar position 8.
  • Seat 4 and backrest 7 consist of a one-piece plastic shell and are articulated or flexibly connected to one another by a middle or intermediate part 9 which is almost flat in cross section.
  • a manual actuation lever 10 is shown, which is attached to an actuation tube 16 protruding from the bearing tube 3 and with which the device described in FIGS. 3, 4 and 5 for locking the seat in the steep position 1 position is actuated. 1, the backrest should be locked, and when the lever is pivoted down according to FIG. 2, it should be unlocked.
  • Fig. 3 shows a view from below of the box-shaped housing part 2, which is placed with a sleeve-like support 11 on a corresponding counterpart of the column 1.
  • the housing part 2 is provided with bearings 12 for the support shaft 5, which carries a radially downwardly projecting cam 13, 14 on each side of the support 11.
  • the bearing tube 3, in which the actuating tube 16 is mounted, is attached to a front wall 21 of the box-shaped housing part 2.
  • the bearing tube 3 is provided in the region of the housing part 2 with an elongated hole 17 which extends in the circumferential direction and is penetrated by a pin 18 which is fixedly connected to the actuating tube 16.
  • a transmission member 19 in the form of a rigid piece of wire is connected to the pin 18 and transmits the movement to be carried out by means of the hand lever 10 to a locking lever 20 of the locking device.
  • a Bowden cable could also be provided.
  • an intermediate wall 22 Arranged in the box-shaped housing part 2 is an intermediate wall 22 which is parallel to its front wall 21 and whose distance from the front wall 21 can be adjusted by means of a schematically indicated spreading device 23.
  • the intermediate wall 22 is penetrated by two control rods 24, 25 which carry an articulated fork head 26, 27 at the front, to which the cams 13, 14 are articulated via bolts 28, 29.
  • the fork heads 26, '27 each have a disk, between which and the wall 22 a helical compression spring 30, 31 enclosing the control rod 24 or 25 is clamped.
  • the preload of the springs can be adjusted by means of the spreading device 23.
  • the clevises 26, 27 also each carry a stop piece 32, 33, the stop surface of which is forward, i.e. towards the front bearing tube 3.
  • a bearing 34 is formed for a bolt 35 directed parallel to the bearing tube 3 and the shaft 5, on the two freely projecting ends of which an approximately H-shaped one is mounted in plan view, the free legs of which as locking arms 36, 37 are pivotable in front of the stop pieces 32, 33 by means of the actuating handle 10 or can be pivoted away from these stop pieces 32, 33.
  • the transmission member 19 engages a pin 38 which is approximately perpendicular to the pin 35 and is arranged at a significant distance from the pin 35 on the locking lever 20.
  • the articulated fork heads 26, 27 for the articulation pins 28, 29 of the cams 13, 14 and the bearing 34 for the pin 35 can also each be designed as an open bearing jaw 26 'or 34'.
  • the hairpin-like curved leaf spring 39 is used with its back leg 140 in the region of the hole 41 on the front wall 21 of the housing part 2 is attached so that it surrounds the pin 18 between them with its two spring legs 42, 43.
  • the two legs 42, 43 are bent close together in their central region and here form a latching threshold 44, which the pin 18 must overcome when changing between its two end positions.
  • the two clevises 26, 27 can be rigidly connected to one another via a bridge 45 which bypasses the support 11, as a result of which a symmetrical distribution of forces is ensured to a particularly high degree and bending moments and canting are prevented.
  • the locking device can, as shown in FIG. 3, be designed and accommodated in a very compact and space-saving manner, so that even further devices such as the spreading device 23 or another actuating tube 46 with linkage 47 for height adjustment of the seat can be accommodated in the box-shaped housing part 2 .
  • the springs 30, 31, which load the backrest in the sense of a steep position are arranged below the seat in the housing 2, in the embodiment according to FIGS. 6 to 9 angled armrests 48 are provided which are resilient in their curvature region 49 and hold the backrest in the steep position according to FIG. 6 when not loaded.
  • the armrests are connected to shaft 50 which passes through the bearing tube 3 or the actuating tubes 16 and 46 received by the bearing tube 3 and ensures a synchronous movement of both armrests.
  • V-shaped locking lever 51 which is also pivotally mounted on the underside of the housing part 2 about a bolt 35 and which can be pivoted from the manual operating lever 10 in the same way as in the first exemplary embodiment via a transmission member 19 and with its locking arms 52, 53 is pivoted directly in front of the cams 13, 14.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Exchange Systems With Centralized Control (AREA)
  • Supports Or Holders For Household Use (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Chemical And Physical Treatments For Wood And The Like (AREA)

Abstract

An office chair including a seat portion, a backrest portion joined to the seat portion in an articulated or flexible fashion, and an underframe. The seat portion is articulatingly supported, in an area of a forward edge thereof, on a front bearing pipe and the backrest portion is supported approximately at a hip level through supporting levers on a horizontally extending supporting shaft disposed below the seat portion at a distance therefrom so that solely by shifting one's weight, the inclination of the backrest portion and seat portion can be varied. A locking mechanism, which may be conveniently manipulated from a sitting position and which does not impair the overall appearance of the chair is provided which includes a locking lever disposed in a space between the bearing pipe and the supporting shaft in a housing section of the underframe. The locking mechanism is operable by way of a transmission path from an operating lever arranged in close proximity below the forward edge of the seat portion.

Description

Die Erfindung betrifft ein Arbeits-Sitzmöbel, mit einem Sitz, mit einer gelenkig oder flexibel mit dem Sitz verbundenen Rückenlehne, mit einer die Rückenlehne im Sinne einer Steilstellung belastenden Feder und mit einem Untergestell in weichem ein horizontales, vorderes Lagerrohr auf welchem der Sitz im Bereich seiner Vorderkante gelenkig abgestützt ist, und eine hintere, mit Abstand unterhalb des Sitzes liegende, horizontale Stützwelle gelagert sind, mit der mindestens ein die Rückenlehne etwa in Lendenhöhe gelenkig abstützender Stützhebel starr verbunden ist und die mindestens einen radial abragenden Nocken aufweist.The invention relates to a work seating, with a seat, with an articulated or flexible backrest, with a spring loading the backrest in the sense of a steep position and with a base in soft a horizontal, front bearing tube on which the seat in the area its front edge is supported in an articulated manner, and a rear, horizontal support shaft lying at a distance below the seat is mounted, with which at least one support lever which supports the backrest at about the lumbar height is rigidly connected and which has at least one radially projecting cam.

Derartige Arbeits-Sitzmöbel sind durch die DE-A-3 036 993 bekannt. Dort werden durch Gewichtsverlagerung die Sitzneigung und die Rückenneigung selbsttätig in einem bestimmten Verhältnis zueinander zwischen einer steilen Sitzhaltung und einer bequemen Rückwärtslage verändert. Im allgemeinen besteht aber auch der Wunsch, das Arbeits-Sitzmöbel in der steilen Sitzstellung arretieren zu können. Zu diesem Zweck sind bereits mit sogenannten Gasfedern ausgerüstete Arretiervorrichtungen bekannt, jedoch stellen Gasfedern ein verhältnismäßig störanfälliges Bauteil dar, das vom Benutzer im Schadensfall nicht ausgewechselt werden kann. Bei den ferner bekannten, rein mechanischen Arretiervorrichtungen wird ein stiftförmiges Arretierglied in eine entsprechende Arretieröffnung eingeführt, was mit einer lästigen Handhabung verbunden ist, zumal das Betätigungsglied im Sitzen oft nur bei verrenkter Körperhaltung gegriffen werden kann. Zudem sind die bekannten Arretiervorrichtungen oft sperrig, so daß sie das Erscheinungsbild des Sitzmöbels beeinträchtigen.Such work seating is known from DE-A-3 036 993. There, the seat inclination and the back inclination are automatically changed in a certain relationship between a steep seated posture and a comfortable backward position by shifting the weight. In general, however, there is also a desire to be able to lock the work seating in the steep seating position. For this purpose, locking devices equipped with so-called gas springs are already known, but gas springs are a relatively fault-prone component that cannot be replaced by the user in the event of damage. In the further known, purely mechanical locking devices, a pin-shaped locking member is inserted into a corresponding locking opening, which is associated with annoying handling, especially since the actuating member can often only be gripped when sitting in a dislocated posture. In addition, the known locking devices are often bulky, so that they affect the appearance of the seating.

Der Erfindung liegt die Aufgabe zugrunde, das gattungsgemäße Arbeits-Sitzmöbel mit einer Arretiervorrichtung für die Sitz Rückenlehnen-Neigung zu versehen welche im Sitzen bequem greifbar ist und verdeckt innerhalb der ohnehin vorhandenen Stuhlmechanik untergebracht ist,, so daß sie das Erscheinungsbild des Sitzmöbels nicht beeinträchtigt.The invention has for its object to provide the generic work seating with a locking device for the seat backrest inclination which is easy to grasp while sitting and is concealed within the already existing chair mechanism, so that it does not affect the appearance of the seating.

Zur Lösung dieser Aufgabe ist erfindungsgemäß vorgesehen, daß am Untergestell ein Sperrhebel angelenkt ist, der durch ein Übertragungsglied an ein das vordere Lagerrohr durchsetzendes, durch einen Betätigungshebel drehbares Betätigungsrohr angelenkt und als Sperre in die Bewegungsbahn des Nockens schwenkbar ist. Infolgedessen ist es beim Arbeits-Sitzmöbel nach der Erfindung nunmehr möglich, das Betätigungsglied für die Arretiervorrichtung unterhalb der Sitzfläche und zwar nahe ihrer Vorderkante und nahe einer ihrer Seitenränder anzuordnen, so daß das Betätigungsglied sowohl bei aufrechter Sitzhaltung als auch bei rückwärts geneigter Sitzhaltung bequem' mit z. B. der linken Hand erreicht werden kann. Die Kraftübertragung erfolgt dann mittels des das ohnehin vorhandene vordere Lagerrohr umschließenden Betätigungsrohres, das somit optisch nicht bzw. kaum in Erscheinung tritt. Die weitere Kraftübertragung erfolgt über ein Übertragungsglied, das ebenso wie der Sperrhebel verhältnismäßig klein ausgebildet werden kann, so daß diese Teile mehr oder weniger verdeckt innerhalb des das vordere Lagerrohr und ihre hintere Stützwelle tragenden Teiles des Untergestelles untergebracht werden können.To achieve this object, it is provided according to the invention that a locking lever is articulated on the underframe, which is articulated by a transmission member to an actuating tube which passes through the front bearing tube and can be rotated by an actuating lever, and which can be pivoted as a lock into the movement path of the cam. As a result, it is now possible for work seating furniture according to the invention to arrange the actuating element for the locking device below the seat surface, namely near its front edge and close to one of its side edges, so that the actuating element is comfortable with both in an upright sitting position and in a reclined sitting position e.g. B. the left hand can be reached. The power transmission then takes place by means of the actuating tube which surrounds the front bearing tube, which is already present, and which therefore does not appear or hardly appears. The further power transmission takes place via a transmission member which, like the locking lever, can be made relatively small, so that these parts can be accommodated more or less concealed within the part of the underframe which carries the front bearing tube and its rear support shaft.

Die Arretiervorrichtung nach der Erfindung ist mit besonderem Vorteil anwendbar bei einem Arbeits-Sitzmöbel, bei dem die Stützwelle zwei parallel nach unten abragende Nocken aufweist, die jeweils an den Gabelgelenkkopf einer von einer Schrauben druckfeder umschlossenen Steuerstange angelenkt sind. Bei einem solchen Arbeits-Sitzmöbel kann der Erfindung zufolge vorgesehen werden, daß der Sperrhebel mittig zwischen den beiden Schraubendruckfedern an einem kastenförmigen Gehäuseteil des Untergestelles gelagert ist gelenkköpfen ausgerichtete Sperrarme trägt, welche die fußseitige Abstützeinrichtung des Gehäuseteiles zwischen sich einfassen. Hierdurch wird eine besonders kompakte und völlig verdeckte Anordnung der Arretiereinrichtung ermöglicht, wobei zugleich eine symmetrische Kräfteverteilung sichergestellt werden kann.The locking device according to the invention can be used with particular advantage in a piece of work seating in which the support shaft has two cams which project downward in parallel and are each articulated on the fork joint head of a control rod enclosed by a compression spring screw. In such work seating furniture can be provided according to the invention that the locking lever is mounted centrally between the two helical compression springs on a box-shaped housing part of the base frame carries articulated-headed locking arms which enclose the foot-side support device of the housing part between them. This enables a particularly compact and completely concealed arrangement of the locking device, and at the same time a symmetrical distribution of forces can be ensured.

Weitere Merkmale der Erfindung sind in den Unteransprüchen angegeben.Further features of the invention are specified in the subclaims.

Die Erfindung wird im folgenden anhand zweier in der Zeichnung dargestellter Ausführungsbeispiele näher beschrieben. Es zeigen:

  • Fig. 1 in Seitenansicht ein als Arbeitsstuhl ausgebildetes Sitzmöbel in steiler Grundstellung,
  • Fig. 2 den Arbeitsstuhl nach Fig. 1 in zurückgeschwenkter Ruhestellung
  • Fig. 3 in einer Teilansicht, in Richtung des pfeiles in Fig. 1 gesehen, eine Einrichtung zur Arretierung des Stuhles in der Stellung nach Fig. 1
  • Fig. 4 eine Rastfeder zur Sicherung der beiden Endstellungen der Arretiereinrichtung,
  • Fig. 5 in einer stark vereinfachten Prinzipdarstellung die Arretiereinrichtung in einem Vertikalschnitt in der Darstellungsebene nach Fig. 1,
  • Fig. 6 und 7 ein zweites Ausführungsbeispiel des Arbeitsstuhles in zwei verschiedenen Stellungen,
  • Fig. 8 eine Detailansicht in Richtung des Pfeiles VIII in Fig. 6
    und
  • Fig. 9 einen Schnitt gemäß der Linie IX - IX in Fig. 8.
The invention is described below with reference to two exemplary embodiments shown in the drawing. Show it:
  • 1 is a side view of a chair designed as a work chair in a steep basic position,
  • Fig. 2 shows the work chair according to Fig. 1 in the pivoted-back rest position
  • 3 in a partial view, seen in the direction of the arrow in FIG. 1, a device for locking the chair in the position according to FIG. 1
  • 4 is a detent spring for securing the two end positions of the locking device,
  • 5 is a greatly simplified schematic diagram of the locking device in a vertical section in the plane of FIG. 1,
  • 6 and 7 a second embodiment of the work chair in two different positions,
  • 8 is a detailed view in the direction of arrow VIII in FIG. 6
    and
  • 9 shows a section along the line IX-IX in FIG. 8.

Das Sitzmöbel nach den Fig. 1 und 2 besitzt ein Untergestell 1, welches eine Säule und einen vom oberen, etwa unterhalb der Sitzmitte liegenden Säulenende nach vorne abragenden Tragarm in Form eines flachen, breiten Gehäuseteiles 2 aufweist, das an seinem vorderen Ende ein horizontales, vorderes Lagerrohr 3 trägt, auf welchem der Sitz 4 in seinem vorderen Bereich angelenkt ist. Am oberen Ende der Säule bzw. am hinteren Ende des Gehäuseteiles 2 ist im Abstand unterhalb des Sitzes 4 eine Stützwelle 5 drehbar gelagert, an deren beiden Enden jeweils ein Stützhebel 6 starr befestigt ist, welche mit ihrem anderen Ende an einer Rückenlehne 7 des Sitzmöbels etwa in Lendenhöhe an der Stelle 8 angelenkt sind. Sitz 4 und Lehne 7 bestehen aus einer einstückig hergestellten Kunststoffschale und sind durch ein im Querschnitt fast ebenes Mittel- oder Zwischenteil 9 miteinander gelenkig bzw. flexibel verbunden. Im Bereich der vorderen linken Ecke ist unterhalb des Sitzes 4 ein Handbetätigungshebel 10 gezeigt, der an einem aus dem Lagerrohr 3 herausragenden Betätigungsrohr 16 befestigt ist und mit dem die anhand der Fig. 3,4 und 5 beschriebene Einrichtung zur Arretierung des Sitzes in der steilen Stellung nach Fig. 1 betätigt wird. Bei hochgeschwenktem Hebel 10 gemäß Fig. 1 soll die Lehne arretiert, bei niedergeschwenktem Hebel gemäß Fig. 2 entarretiert sein.1 and 2 has a base frame 1 which has a column and a support arm in the form of a flat, wide protruding from the upper, approximately below the center of the column end to the front Has housing part 2, which carries at its front end a horizontal, front bearing tube 3, on which the seat 4 is articulated in its front region. At the upper end of the column or at the rear end of the housing part 2, a support shaft 5 is rotatably mounted at a distance below the seat 4, at the two ends of which a support lever 6 is rigidly fastened, the other end of which is approximately attached to a backrest 7 of the seating are articulated at lumbar position 8. Seat 4 and backrest 7 consist of a one-piece plastic shell and are articulated or flexibly connected to one another by a middle or intermediate part 9 which is almost flat in cross section. In the area of the front left corner, below the seat 4, a manual actuation lever 10 is shown, which is attached to an actuation tube 16 protruding from the bearing tube 3 and with which the device described in FIGS. 3, 4 and 5 for locking the seat in the steep position 1 position is actuated. 1, the backrest should be locked, and when the lever is pivoted down according to FIG. 2, it should be unlocked.

Fig. 3 zeigt in einer Ansicht von unten das kastenförmige Gehäuseteil 2, welches mit einer hülsenartigen Abstützung 11 auf ein entsprechendes Gegenstück der Säule 1 gesetzt wird. An seinem hinteren Rand ist das Gehäuseteil 2 mit Lagern 12 für die Stützwelle 5 versehen, die beidseits der Abstützung 11 je einen radial nach unten abragenden Nocken 13, 14 trägt.Fig. 3 shows a view from below of the box-shaped housing part 2, which is placed with a sleeve-like support 11 on a corresponding counterpart of the column 1. At its rear edge, the housing part 2 is provided with bearings 12 for the support shaft 5, which carries a radially downwardly projecting cam 13, 14 on each side of the support 11.

An einer Vorderwand 21 des kastenförmigen Gehäuseteiles 2 ist das Lagerrohr 3 angebracht, in welchem das Betätigungsrohr 16 gelagert ist. Das Lagerrohr 3 ist im Bereich des Gehäuseteils 2 mit einem in Umfangrichtung sich erstreckenden Langloch 17 versehen, welches von einem Stift 18 durchsetzt ist, der fest mit dem Betätigungsrohr 16 verbunden ist. An den Stift 18 ist ein Übertragungsglied 19 in Form eines steifen Drahtstückes angeschlossen, welches die mittels des Handhebels 10 auszuführende Bewegung an einen Sperrhebel 20 der Arretiereinrichtung überträgt. Anstelle eines steifen Drahtstückes könnte auch ein Bowdenzug vorgesehen werden.The bearing tube 3, in which the actuating tube 16 is mounted, is attached to a front wall 21 of the box-shaped housing part 2. The bearing tube 3 is provided in the region of the housing part 2 with an elongated hole 17 which extends in the circumferential direction and is penetrated by a pin 18 which is fixedly connected to the actuating tube 16. A transmission member 19 in the form of a rigid piece of wire is connected to the pin 18 and transmits the movement to be carried out by means of the hand lever 10 to a locking lever 20 of the locking device. Instead of a stiff piece of wire, a Bowden cable could also be provided.

In dem kastenförmigen Gehäuseteil 2 ist eine zu seiner Vorderwand 21 parallele Zwischenwand 22 angeordnet, deren Abstand zur Vorderwand 21 mittels einer schematisch angedeuteten Spreizvorrichtung 23 verstellt werden kann. Die Zwischenwand 22 ist von zwei Steuerstangen 24, 25 durchsetzt, die vorne einen Gelenkgabelkopf 26, 27 tragen, an welchen die Nocken 13, 14 über Bolzen 28, 29 angelenkt sind. Die Gabelköpfe 26,' 27 besitzen jeweils eine Scheibe, zwischen der und der Wand 22 jeweils eine die Steuerstange 24 bzw. 25 umschließende Schraubendruckfeder 30, 31 eingespannt ist. Mittels der Spreizvorrichtung 23 kann die Vorspannung der Federn eingestellt werden. Die Gabelköpfe 26, 27 tragen ferner jeweils ein Anschlagstück 32, 33, deren Anschlagfläche nach vorne hin, d.h. zum vorderen Lagerrohr 3 hin, liegt.Arranged in the box-shaped housing part 2 is an intermediate wall 22 which is parallel to its front wall 21 and whose distance from the front wall 21 can be adjusted by means of a schematically indicated spreading device 23. The intermediate wall 22 is penetrated by two control rods 24, 25 which carry an articulated fork head 26, 27 at the front, to which the cams 13, 14 are articulated via bolts 28, 29. The fork heads 26, '27 each have a disk, between which and the wall 22 a helical compression spring 30, 31 enclosing the control rod 24 or 25 is clamped. The preload of the springs can be adjusted by means of the spreading device 23. The clevises 26, 27 also each carry a stop piece 32, 33, the stop surface of which is forward, i.e. towards the front bearing tube 3.

Am Boden des kastenförmigen Gehäuseteiles 2 ist ein Lager 34 für einen parallel zum Lagerrohr 3 und der Welle 5 gerichteten Bolzen 35 ausgebildet, auf dessen beiden, frei herausragenden Enden ein in Draufsicht etwa H-förmiger gelagert ist, dessen freie Schenkel als Sperrarme 36, 37 vor die Anschlagstücke 32, 33 mittels des Betätigungsgriffes 10 schwenkbar bzw. von diesen Anschlagstücken 32, 33 wegschwenkbar sind. Das Übertragungsglied 19 greift hierbei an einem etwa senkrecht zum Bolzen 35 gerichteten, in deutlichem Abstand vom Bolzen 35 am Sperrhebel 20 angebrachten Stift 38 an. Wie aus Fig. 5 ersichtlich ist, können die Gelenkgabelköpfe 26, 27 für die Anlenkbolzen 28, 29 der Nocken 13, 14 und das Lager 34 für den Bolzen 35 auch jeweils als offenes Lagermaul 26' bzw. 34' ausgebildet sein.At the bottom of the box-shaped housing part 2, a bearing 34 is formed for a bolt 35 directed parallel to the bearing tube 3 and the shaft 5, on the two freely projecting ends of which an approximately H-shaped one is mounted in plan view, the free legs of which as locking arms 36, 37 are pivotable in front of the stop pieces 32, 33 by means of the actuating handle 10 or can be pivoted away from these stop pieces 32, 33. The transmission member 19 engages a pin 38 which is approximately perpendicular to the pin 35 and is arranged at a significant distance from the pin 35 on the locking lever 20. As can be seen from FIG. 5, the articulated fork heads 26, 27 for the articulation pins 28, 29 of the cams 13, 14 and the bearing 34 for the pin 35 can also each be designed as an open bearing jaw 26 'or 34'.

Zur Sicherung der beiden Endstellungen des Betätigungshebels 10 bzw. der Gesamtarretiervorrichtung dient die in Fig. 3 schematisch skizzierte und in Fig. 4 in vergrößertem Maßstab dargestellte haarnadelartig gebogene Blattfeder 39, die mit ihrem Rückenschenke140 im Bereich des Loches 41 an die Vorderwand 21 des Gebäuseteils 2 befestigt wird, so daß sie mit ihren beiden Federschenkeln 42, 43 den Stift 18 zwischen sich einfaßt. Die beiden Schenkel 42,43 sind in ihrem mittleren Bereich nahe aneinander herangebogen und bilden hier eine Rastschwelle 44, die der Stift 18 beim Wechsel zwischen seinen beiden Endstellungen überwinden muß.To secure the two end positions of the actuating lever 10 or the overall locking device, the hairpin-like curved leaf spring 39, schematically sketched in FIG. 3 and shown on an enlarged scale in FIG. 4, is used with its back leg 140 in the region of the hole 41 on the front wall 21 of the housing part 2 is attached so that it surrounds the pin 18 between them with its two spring legs 42, 43. The two legs 42, 43 are bent close together in their central region and here form a latching threshold 44, which the pin 18 must overcome when changing between its two end positions.

Wie in Fig. 3 noch gestrichelt angedeutet ist, können die beiden Gabelköpfe 26, 27 über eine die Abstützung 11 umgehende Brücke 45 starr miteinander verbunden sein, wodurch eine symmetrische Kräfteverteilung in besonders hohem Maße sichergestellt und Biegemomenten und Verkantungen vorgebeugt wird.As is indicated in dashed lines in FIG. 3, the two clevises 26, 27 can be rigidly connected to one another via a bridge 45 which bypasses the support 11, as a result of which a symmetrical distribution of forces is ensured to a particularly high degree and bending moments and canting are prevented.

Die Arretiereinrichtung kann wie Fig. 3 zeigt, sehr kompakt und raumsparend ausgebildet und untergebracht werden, so daß auch noch weitere Einrichtungen wie beispielsweise die Spreizeinrichtung 23 oder ein weiteres Betätigungsrohr 46 mit Gestänge 47 für eine Höhenverstellung des Sitzes in dem kastenförmigen Gehäuseteil 2 untergebracht werden können.The locking device can, as shown in FIG. 3, be designed and accommodated in a very compact and space-saving manner, so that even further devices such as the spreading device 23 or another actuating tube 46 with linkage 47 for height adjustment of the seat can be accommodated in the box-shaped housing part 2 .

Während beim Ausführungsbeispiel nach den Fig. 1 bis 5 die Federn 30, 31, welche die Rückenlehne im Sinne einer Steilstellung belasten, unterhalb des Sitzes im Gehäuse 2 angeordnet sind, sind beim Ausführungsbeispiel nach den Fig. 6 bis 9 abgewinkelte Armlehnen 48 vorgesehen, die in ihrem Krümmungsbereich 49 federnd ausgebildet sind und die Rückenlehne bei unbelastetem Zustand in der steilen Stellung nach Fig. 6 halten. Die Armlehnen Welle 50 verbunden, die das Lagerrohr 3, bzw. die vom Lagerrohr 3 aufgenommenen Betätigungsrohre 16 und 46 durchsetzt und eine synchrone Bewegung beider Armlehnen sicherstellt. Zur Arretierung der Rückenlehne dient hier ein ebenfalls an der Unterseite des Gehäuseteiles 2 um einen Bolzen 35 schwenkbar gelagerter, V-förmiger Sperrhebet 51, der in der gleichen Weise wie beim ersten Ausführungsbeispiel über ein Übertragungsglied 19 vom Handbetätigungshebel 10 aus verschwenkbar ist und mit seinen Sperrarmen 52, 53 unmittelbar vor die Nocken 13, 14 geschwenkt wird.1 to 5, the springs 30, 31, which load the backrest in the sense of a steep position, are arranged below the seat in the housing 2, in the embodiment according to FIGS. 6 to 9 angled armrests 48 are provided which are resilient in their curvature region 49 and hold the backrest in the steep position according to FIG. 6 when not loaded. The armrests are connected to shaft 50 which passes through the bearing tube 3 or the actuating tubes 16 and 46 received by the bearing tube 3 and ensures a synchronous movement of both armrests. For locking the backrest is served here by a V-shaped locking lever 51 which is also pivotally mounted on the underside of the housing part 2 about a bolt 35 and which can be pivoted from the manual operating lever 10 in the same way as in the first exemplary embodiment via a transmission member 19 and with its locking arms 52, 53 is pivoted directly in front of the cams 13, 14.

Claims (6)

1. Seating furniture for work with a seat (4) with a backrest (7) connected jointedly or flexibly with the seat, with a spring loading the backrest in the sense of a steep position, and with a lower frame (1) in which a horizontal, front bearing pipe (3), on which the seat (4) is supported jointedly in the area of its front edge, and a hind, horizontal bearing shaft (5) lying at a distance below the seat, are mounted, with which at least a supporting lever (6) supporting the backrest jointedly approximately at the level of the lumbar is connected rigidly and which has at least one radially protruding cam (13, 14), characterized in that at the lowerframe (1) a locking lever (20) has been articulated which is attached jointedly by a transfer member (19) to a rotatable operating pipe (16) by an operating lever (10) penetrating the forward bearing pipe (3) and which is swivelable as a lock into the path of movement of the cam (13, 14).
2. Seating furniture as in claim 1, characterized in that the locking lever (20) is mounted centrally on a boxshaped housing part (2) of the lower frame (1) and has two locking arms (36, 37) aligned in relation to one of the cams (13, 14) which locking arms enclose between themselves a columnshaped supporting arrangement (11) on the side of the foot of the housing part (2).
3. Seating furniture as in claims 1 and 2, characterized in that the bearing pipe (3) is provided with an elongated hole (17) running in the direction of the periphery for the passage of a peg (18) protruding radially from the operating pipe (16) to which peg the transfer member (19) has been articulated.
4. Seating furniture as in claim 3, characterized in that the transfer member (19) consists of a stiff piece of wire or a Bowden pull wire.
5. Seating furniture as in claim 3 or 4, characterized in that the peg (18) is swivelable inside of a leaf spring (39) bent approximately in the manner of a hair needle, the back legs (40) of which are attached to the boxshaped housing part (2) and which has a stop sill (44) lying between the two terminal positions of the peg (18).
6. Seating furniture as in claim 2, characterized in that the bearing shaft (5) has two parallel cams (13, 14) protruding downwards which are always attached jointedly to a fork head (26, 27) of a control rod (24, 25) enclosed by a screw pressure spring (30,31) and in that the two fork heads (26, 27) are connected rigidly with a bridge (45) bypassing the supporting arrangement (11) on the side of the foot.
EP83108406A 1982-09-03 1983-08-26 Working-chair Expired EP0105180B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83108406T ATE24270T1 (en) 1982-09-03 1983-08-26 WORK SEATING.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3232771 1982-09-03
DE19823232771 DE3232771A1 (en) 1982-09-03 1982-09-03 WORK SEAT

Publications (3)

Publication Number Publication Date
EP0105180A2 EP0105180A2 (en) 1984-04-11
EP0105180A3 EP0105180A3 (en) 1985-04-17
EP0105180B1 true EP0105180B1 (en) 1986-12-17

Family

ID=6172389

Family Applications (1)

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EP83108406A Expired EP0105180B1 (en) 1982-09-03 1983-08-26 Working-chair

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US (1) US4509793A (en)
EP (1) EP0105180B1 (en)
JP (1) JPS59131307A (en)
AT (1) ATE24270T1 (en)
AU (1) AU553797B2 (en)
CA (1) CA1208115A (en)
DE (2) DE3232771A1 (en)
ES (2) ES282961Y (en)
ZA (1) ZA836396B (en)

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DE4324543C2 (en) * 1993-07-22 2003-06-26 Dauphin Friedrich W Gmbh Chair, especially office chair

Also Published As

Publication number Publication date
DE3232771A1 (en) 1984-03-08
CA1208115A (en) 1986-07-22
EP0105180A2 (en) 1984-04-11
DE3368381D1 (en) 1987-01-29
ZA836396B (en) 1984-04-25
AU1857183A (en) 1984-03-08
EP0105180A3 (en) 1985-04-17
JPH0454445B2 (en) 1992-08-31
ES282961Y (en) 1985-12-16
ATE24270T1 (en) 1987-01-15
ES282961U (en) 1985-05-01
JPS59131307A (en) 1984-07-28
AU553797B2 (en) 1986-07-24
ES283988U (en) 1985-07-01
ES283988Y (en) 1986-04-01
US4509793A (en) 1985-04-09

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