EP0561059A1 - Office chair - Google Patents

Office chair Download PDF

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Publication number
EP0561059A1
EP0561059A1 EP92122013A EP92122013A EP0561059A1 EP 0561059 A1 EP0561059 A1 EP 0561059A1 EP 92122013 A EP92122013 A EP 92122013A EP 92122013 A EP92122013 A EP 92122013A EP 0561059 A1 EP0561059 A1 EP 0561059A1
Authority
EP
European Patent Office
Prior art keywords
support
seat support
seat
backrest
bearing block
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP92122013A
Other languages
German (de)
French (fr)
Other versions
EP0561059B1 (en
Inventor
Heinrich Korn
Wilfried Lange
Rolf Scholz
Norbert Tuschl
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.)
Haworth Buroeinrichtungen GmbH
Original Assignee
Roeder GmbH
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 Roeder GmbH filed Critical Roeder GmbH
Publication of EP0561059A1 publication Critical patent/EP0561059A1/en
Application granted granted Critical
Publication of EP0561059B1 publication Critical patent/EP0561059B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03266—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with adjustable elasticity
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
    • A47C1/03216—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination by fluid means
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255—Reclining 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
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03272—Reclining 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 chair, in particular a work or office chair, with a seat support with a seat which can be pivoted in the front region about a horizontal pivot axis of the seat support and which can be changed in inclination, and a backrest support with a backrest which can be changed in proportion to the inclination of the seat support , in which with increasing inclination the seat support can be adjusted in the direction of the backrest to a limited extent and its front area can be lowered to a limited extent, the seat support pivot axis being adjustable in guides sloping backwards, in which the backrest support is guided under the seat and rotatable on the seat support is mounted, in which the backrest support is extended beyond this seat support pivot bearing in the direction of the seat support pivot axis and is articulated with its end on the bearing block and in which the bearing block with a column support f is provided for the pedestal of the chair frame.
  • a chair of this type is known from DE 39 16 474 C2.
  • the entire adjustment mechanism required for the synchronous adjustment of the seat support and backrest support is located below the seat.
  • a gas pressure spring is provided as a spring arrangement, which is articulated on the bearing block and on the backrest support supports.
  • this spring arrangement has no possibility of setting a set inclination of the seat support and backrest support.
  • DE 36 17 539 C1 shows a spring arrangement for a chair with a seat support and a backrest support, which are pivotally connected to one another by means of a backrest pivot bearing and are both pivotable relative to a bearing block connected to the base frame, the seat support in the front area around a horizontal seat support -Swivel axis is pivotally mounted on the pedestal, in which gas pressure springs with approximately the same characteristic curve are arranged on both sides of the pillar, which are supported on the pedestal and in which an adjustable weight compensation spring, which is supported on the pedestal and on the seat support, is arranged in the center between the two gas pressure springs.
  • the seat support and backrest support are independently adjustable and adjustable.
  • this requires a further, lockable gas pressure spring, which is supported on the backrest support and the seat support.
  • the two gas pressure springs supported on the pedestal can also be locked and are also supported on the seat support.
  • the weight compensation spring engages between the seat support pivot axis and the pillar on the seat support and is designed as a compression spring that is supported on the bearing block.
  • the adjustment mechanism is complicated and the effort of the spring arrangement is great.
  • the swivel bearings are loaded unevenly.
  • a gas pressure spring is arranged on both sides of the pillar support of the bearing block, that the one ends of the gas pressure springs behind the pedestal support on the pedestal so that the other ends of the gas struts are supported on the seat support in the area of the seat support pivot axis, that between the seat support pivot axis and the support pillar support a two-armed adjustment lever with a horizontal bearing axis on the seat support is rotatably mounted that the lever arm directed towards the backrest of the adjusting lever is connected in an articulated manner to one end of a weight compensation pressure spring which is articulated with the other end in front of the column support on the bearing block, and that the lever arm directed to the seat support pivot axis of the Adjusting lever supported under tension on the end of an adjustable clamping screw in the seat support.
  • the backrest support is not pivotally connected to the rear end of the seat support, but is supported below the seat support in front of the pillar on the bearing block.
  • the backrest support is rotatably mounted below the seat on the seat support.
  • the two gas pressure springs are supported behind the pedestal on the pedestal and are guided forward to the area of the seat support pivot axis and are supported on the seat support.
  • the gas pressure springs are fairly flat and are not lowered when changing the inclination of the seat support and backrest support so that additional space in the cover must be kept free. The cover can therefore connect directly to the bearing block.
  • the weight compensation compression spring is placed between the seat support pivot axis and the pedestal and arranged between the seat support and the pedestal, whereby a translation can be included for their adjustment by means of an adjusting lever and a clamping screw.
  • the adjustment of the seat in the direction of the backrest and the lowering of the front seating area is retained and at the change in the inclination of the backrest support, the backrest performs an additional lowering movement towards the seat, whereby the so-called "shirt pull-out effect" is avoided. This is achieved solely by the rotary mounting of the backrest support on the seat support and by the rotatable support of the ends of the backrest support on the bearing block below the seat.
  • the pivot connection of the seat carrier and bearing bracket is designed such that the seat carrier pivot axis is fixed in the bearing bracket and is adjustable in the guides of the seat carrier.
  • the guides are designed as sloping elongated holes or circular-shaped guides with a convex curvature directed towards the base.
  • the ends of the guides facing the backrest are designed as snap-in receptacles for the seat support pivot axis, then the configuration of the seat support with the seat can only be lifted by the application of force.
  • one of the two gas pressure springs is designed as a lockable gas pressure spring.
  • the backrest support consists of two spaced-apart support tubes, which are connected to the ends facing the seat support with a connection plate, that on the connection plate two in the direction of Seat carrier pivot axis directed pivot levers are attached, which are rotatably connected to the seat carrier by means of separate seat carrier pivot bearings and are supported with their ends on a common support shaft of the bearing block.
  • the installation of the counterbalance compression spring is carried out according to one embodiment so that the counterbalance compression spring is installed between the seat bracket and the bearing bracket inclined slightly forward, with a cardan shaft between the adjusting lever and the counterbalancing compression spring for supporting the pillar support a larger one Has a distance, such as a support shaft between the weight compensation compression spring and the bearing block.
  • the adjusting means for the weight compensation compression spring are designed so that the adjusting lever is arranged approximately horizontally in the seat carrier, and that the clamping screw is adjustable in a threaded receptacle of the seat carrier and is supported on the underside of the lever arm of the adjusting lever directed towards the seat carrier pivot axis, provided that is that the clamping screw is brought out through an opening in the bearing block and connected with a handle.
  • the chair frame with the pedestal is not shown. Only in a pedestal 10 is a column support 11 mounted so that the pedestal 10 can be connected to the column of the chair frame, which contains an adjustable lifting device in a manner known per se.
  • the bearing block 10 extends to the front of the chair and accommodates a seat support pivot axis 15 in vertical struts (as shown in FIG. 3), which first stretches across the width of the bearing block 10 and is adjustable with its ends in guides 22 of a seat support 20 is as shown in FIGS. 1 and 2.
  • the guides 22 are designed as circular arc-shaped elongated holes, with the convexly curved side facing the standing surface.
  • the guides 22 drop towards the back of the chair and are themselves formed at the associated ends as locking receptacles for the seat support pivot axis 15, so that the starting position of the seat 30 shown in FIG. 1 is maintained and can only be lifted by the application of force.
  • an adjustment mechanism is arranged below the seat 30, which, in addition to the bearing block 10 and the seat support 20, comprises a spring arrangement with two gas pressure springs 25 and 25 'and a weight compensation compression spring 27.
  • the backrest support comprises two spaced tube sections 32, to which the backrest 33 is fastened and which are guided below the seat 30. There they are also attached below the seat support 20 to a connecting plate 34, on which two pivot levers 31 directed towards the front of the chair come out, which are rotatably mounted on the seat support 20 by means of separate seat support pivot bearings 21, as can be seen from the schematic illustration in FIG. 3 is.
  • These seat support pivot bearings 21 are in the area of the support pillar receptacle 11 of the pedestal 10, that is to say approximately in the central area of the seat 30.
  • the ends of the pivot levers 31 are angled slightly behind the seat support pivot supports 21 and between the support pillar receptacle 11 and the seat support pivot axis 15 is rotatably supported on the pedestal 10, as the continuous support shaft 13 shows, which is mounted in vertical webs of the pedestal 10.
  • the spring arrangement has the two gas pressure springs 25 and 25 ', which are symmetrical to the sides of the column support 11 are arranged. Both gas pressure springs 25 and 25 'are supported on the bearing block 10 via the swivel bearings 14 behind the column support 11. The other ends of the gas pressure springs 25 and 25 'are guided forward into the region of the seat support pivot axis 15 and are supported on support shafts 23 which are mounted in vertical webs of the seat support 20.
  • the gas pressure spring 25 ' can be blocked in order to be able to set the inclinations of the seat support 20 and backrest support in a known manner.
  • a weight compensation compression spring 27 is provided, which is arranged between the seat support pivot axis 15 and the column support 11 of the bearing block 10.
  • the lower end of the weight compensation compression spring 27, which is inclined slightly forward, is supported in an articulated manner on a support shaft 16, which is fixed in front of the pillar receptacle 11 in the bearing block 10.
  • the upper end of the counterbalance compression spring 27 is rotatably mounted on an articulated shaft 28 which is part of a two-armed adjusting lever 26.
  • This adjusting lever 26 is rotatably mounted almost horizontally in the seat support 20, as the bearing axis 24 shows.
  • the adjusting lever 26 is aligned parallel to the gas pressure springs 25 and 25 'and lies in the center plane of FIG.
  • the lever arm of the adjusting lever 26 directed towards the seat support pivot axis 15 is under the force of the weight compensation compression spring 27 on the end of a clamping screw 29 which is adjustable in a threaded receptacle 15 of the seat support 20.
  • the bearing block 10 has an opening 12 through which the clamping screw 29 is led out and is provided with a handle. With the clamping screw 29, the adjusting lever 26 can be pivoted and the tensioning of the weight compensation compression spring 27 can be changed. The weight compensation compression spring 27 then exercises on the seat support 20 a torque that counteracts the torque triggered by the load on the seat 30.
  • the adjustment mechanism takes up little space below the seat 30, which is limited to the base area by the bearing block 10. Since no springs swing out of this space, the cover can connect directly to the bearing block 10.

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)

Abstract

The invention relates to a chair, in particular a workchair or office chair, having a seat support (20) with a seat (30), said seat support being pivotable in the front region about a horizontal seat support pivot axle (15) and being variable in inclination, and having a backrest support (32) with a backrest (33), said backrest support being variable in inclination inevitably overproportionally as a function of the change in inclination of the seat support, in which, with an increase in inclination of the seat support (20), the latter is limitedly adjustable in the direction towards the backrest (33) and is limitedly lowerable with its front region, the seat support pivot axle (15) being guided adjustably in guides (22) sloping down towards the rear, in which the backrest support (32) is guided below the seat (30) and is mounted rotatably on the seat support (20), in which the backrest support is extended beyond said seat support rotary bearing in the direction towards the seat support pivot axle and is supported by its end in an articulated manner on the bearing block, and in which the bearing block (10) is provided with a standing column receiver (11) for the standing column of the chair frame. The synchronous change in inclination required between the seat support (20) and the backrest support (32), in conjunction with an additional lowering of the backrest (33) towards the seat (30), a restricted adjustment of the seat in the direction towards the backrest and a limited lowering of the front seat region, are implemented by a novel adjusting mechanism of small constructional height below the seat. <IMAGE>

Description

Die Erfindung betrifft einen Stuhl, insbesondere Arbeits- oder Bürostuhl, mit einem im vorderen Bereich um eine horizontale Sitzträger-Schwenkachse schwenkbaren und in der Neigung verbänderbaren Sitzträger mit Sitz und einem in Abhängigkeit von der Neigungsänderung des Sitzträgers zwangsweise überproportional in der Neigung veränderbaren Rückenlehnenträger mit Rückenlehne, bei dem mit zunehmender Neigung des Sitzträgers dieser in Richtung zur Rückenlehne begrenzt verstellbar und mit seinem vorderen Bereich begrenzt absenkbar ist, wobei die Sitzträger-Schwenkachse in nach rückwärts abfallenden Führungen verstellbar geführt ist, bei dem der Rückenlehnenträger unter den Sitz geführt und am Sitzträger drehbar gelagert ist, bei dem der Rückenlehnenträger über dieses Sitzträger-Drehlager hinaus in Richtung zur Sitzträger-Schwenkachse verlängert ist und sich mit seinem Ende gelenkig am Lagerbock abstützt und bei dem der Lagerbock mit einer Standsäulen-Aufnahme für die Standsäule des Stuhlgestelles versehen ist.The invention relates to a chair, in particular a work or office chair, with a seat support with a seat which can be pivoted in the front region about a horizontal pivot axis of the seat support and which can be changed in inclination, and a backrest support with a backrest which can be changed in proportion to the inclination of the seat support , in which with increasing inclination the seat support can be adjusted in the direction of the backrest to a limited extent and its front area can be lowered to a limited extent, the seat support pivot axis being adjustable in guides sloping backwards, in which the backrest support is guided under the seat and rotatable on the seat support is mounted, in which the backrest support is extended beyond this seat support pivot bearing in the direction of the seat support pivot axis and is articulated with its end on the bearing block and in which the bearing block with a column support f is provided for the pedestal of the chair frame.

Ein Stuhl dieser Art ist aus der DE 39 16 474 C2 bekannt. Bei diesem bekannten Stuhl befindet sich der gesamte, für die Synchronverstellung von Sitzträger und Rückenlehnenträger erforderliche Stellmechanismus unterhalb des Sitzes. Dasselbe trifft auch für die Federanordnung zu. Bei diesem bekannten Stuhl ist als Federanordnung eine Gasdruckfeder vorgesehen, welche sich am Lagerbock und am Rückenlehnenträger gelenkig abstützt. Diese Federanordnung besitzt aber keine Möglichkeit, eine eingestellte Neigung von Sitzträger und Rückenlehnenträger festzulegen. Außerdem besteht keine Möglichkeit, die Grundeinstellung der Federcharakteristik an das Gewicht des Benutzers anzupassen, d.h. einen sogenannten Gewichtsausgleich vorzunehmen.A chair of this type is known from DE 39 16 474 C2. In this known chair, the entire adjustment mechanism required for the synchronous adjustment of the seat support and backrest support is located below the seat. The same applies to the spring arrangement. In this known chair, a gas pressure spring is provided as a spring arrangement, which is articulated on the bearing block and on the backrest support supports. However, this spring arrangement has no possibility of setting a set inclination of the seat support and backrest support. In addition, there is no possibility to adapt the basic setting of the spring characteristic to the weight of the user, ie to carry out a so-called weight compensation.

Die DE 36 17 539 C1 zeigt eine Federanordnung für einen Stuhl mit einem Sitzträger und einem Rückenlehnenträger, die mittels eines Rückenlehnen-Schwenklagers schwenkbar miteinander verbunden und beide gegenüber einem mit dem Fußgestell verbundenen Lagerbock verschwenkbar sind, wobei der Sitzträger im vorderen Bereich um eine horizontale Sitzträger-Schwenkachse am Lagerbock schwenkbar gelagert ist, bei dem zu beiden Seiten der Standsäule Gasdruckfedern mit etwa derselben Kennlinie angeordnet sind, die sich am Lagerbock abstützen und bei dem mittig zwischen den beiden Gasdruckfedern eine am Lagerbock und am Sitzträger abgestützte, einstellbare Gewichtsausgleichsfeder angeordnet ist.DE 36 17 539 C1 shows a spring arrangement for a chair with a seat support and a backrest support, which are pivotally connected to one another by means of a backrest pivot bearing and are both pivotable relative to a bearing block connected to the base frame, the seat support in the front area around a horizontal seat support -Swivel axis is pivotally mounted on the pedestal, in which gas pressure springs with approximately the same characteristic curve are arranged on both sides of the pillar, which are supported on the pedestal and in which an adjustable weight compensation spring, which is supported on the pedestal and on the seat support, is arranged in the center between the two gas pressure springs.

Bei diesem bekannten Stuhl sind Sitzträger und Rückenlehnenträger unabhängig voneinander verstellbar und einstellbar. Dies erfordert jedoch eine weitere, blockierbare Gasdruckfeder, die sich an dem Rückenlehnenträger und dem Sitzträger abstützt. Die beiden an dem Lagerbock abgestützten Gasdruckfedern sind ebenfalls blockierbar und stützen sich zusätzlich am Sitzträger ab. Die Gewichtsausgleichsfeder greift zwischen der Sitzträger-Schwenkachse und der Standsäule am Sitzträger an und ist als Druckfeder ausgebildet, die sich am Lagerbock abstützt. Der Verstellmechanismus ist kompliziert und der Aufwand der Federanordnung groß. Außerdem werden die Schwenklager ungleich belastet.In this known chair, the seat support and backrest support are independently adjustable and adjustable. However, this requires a further, lockable gas pressure spring, which is supported on the backrest support and the seat support. The two gas pressure springs supported on the pedestal can also be locked and are also supported on the seat support. The weight compensation spring engages between the seat support pivot axis and the pillar on the seat support and is designed as a compression spring that is supported on the bearing block. The adjustment mechanism is complicated and the effort of the spring arrangement is great. In addition, the swivel bearings are loaded unevenly.

Aus der DE 40 20 868 ist ein Stuhl der eingangs erwähnten Art bekannt, bei dem der Aufwand für die Federanordnung reduziert ist und die Belastung der Schwenklager gleichmäßig erfolgt. Der Sitzträger und der Rückenlehnenträger werden dabei synchron verstellt. Die Gasdruckfedern stützen sich an einer über das Rückenlehnenträger-Schwenklager hinaus geführten Verlängerung des Rückenlehnenträgers ab. Es ist nur noch eine Gasdruckfeder blockierbar und die Gewichtsausgleichsfeder ist vor der Sitzträger-Schwenkachse angeordnet und zieht das vordere Ende des Sitzträgers nach unten. In der Ausgangsstellung steht der Rückenlehnenträger annähernd senkrecht, so daß auch die Verlängerung mit der Abstützung der Gasdruckfeder nach unten ragt. Daher ist ein ausreichender Platz unterhalb des Sitzes erforderlich, der innerhalb der Abdeckung des Verstellmechanismus freigehalten werden muß. Außerdem erfordert die Gewichtsausgleichsfeder mit der Lagerung und den Einstellmitteln gerade unterhalb des vorderen Sitzbereiches zusätzlichen Platz, was die Bewegungsfreiheit des Benutzers im Bereich der Kniekehlen beeinträchtigt.From DE 40 20 868 a chair of the type mentioned is known, in which the effort for the spring arrangement is reduced and the load on the swivel bearings takes place evenly. The seat support and the backrest support are adjusted synchronously. The gas pressure springs are supported on an extension of the backrest support that extends beyond the backrest support pivot bearing. Only one gas pressure spring can be locked and the weight compensation spring is arranged in front of the seat support pivot axis and pulls the front end of the seat support downwards. In the starting position, the backrest support is approximately vertical, so that the extension with the support of the gas pressure spring also projects downwards. Therefore, a sufficient space below the seat is required, which must be kept free within the cover of the adjustment mechanism. In addition, the weight compensation spring with the bearing and the adjustment means requires additional space just below the front seat area, which impairs the freedom of movement of the user in the area of the hollow of the knee.

Es ist Aufgabe der Erfindung, einen Sitz der eingangs erwähnten Art zu schaffen, der einen raumsparenden Verstellmechanismus unterhalb des Sitzes aufweist, dennoch eine Synchronverstellung von Sitzträger und Rückenlehnenträger mit zusätzlicher Absenkbewegung der Rückenlehne beim Verändern der Rückenlehnenneigung aufweist und mit einer einfachen Federanordnung die Festlegung einer eingestellten Neigung von Sitzträger und Rückenlehnenträger sowie einen Gewichtsausgleich ermöglicht.It is an object of the invention to provide a seat of the type mentioned, which has a space-saving adjustment mechanism below the seat, yet has a synchronous adjustment of the seat support and backrest support with additional lowering movement of the backrest when changing the inclination of the backrest and with a simple spring arrangement the setting of an adjusted Inclination of seat support and backrest support and a weight balance enables.

Diese Aufgabe wird nach der Erfindung dadurch gelöst, daß auf beiden Seiten der Standsäulen-Aufnahme des Lagerbockes jeweils eine Gasdruckfeder angeordnet ist, daß sich die einen Enden der Gasdruckfedern hinter der Standsäulen-Aufnahme am Lagerbock gelenkig abstützen, daß sich die anderen Enden der Gasdruckfedern im Bereich der Sitzträger-Schwenkachse am Sitzträger gelenkig abstützen, daß zwischen der Sitzträger-Schwenkachse und der Standsäulen-Aufnahme ein zweiarmiger Einstellhebel mit einer horizontalen Lagerachse am Sitzträger drehbar gelagert ist, daß der zur Rückenlehne gerichtete Hebelarm des Einstellhebels gelenkig mit einem Ende einer Gewichtsausgleichs-Druckfeder verbunden ist, die sich mit dem anderen Ende vor der Standsäulen-Aufnahme am Lagerbock gelenkig abstützt, und daß sich der zur Sitzträger-Schwenkachse gerichtete Hebelarm des Einstellhebels unter Spannung auf dem Ende einer im Sitzträger verstellbaren Spannschraube abstützt.This object is achieved according to the invention in that a gas pressure spring is arranged on both sides of the pillar support of the bearing block, that the one ends of the gas pressure springs behind the pedestal support on the pedestal so that the other ends of the gas struts are supported on the seat support in the area of the seat support pivot axis, that between the seat support pivot axis and the support pillar support a two-armed adjustment lever with a horizontal bearing axis on the seat support is rotatably mounted that the lever arm directed towards the backrest of the adjusting lever is connected in an articulated manner to one end of a weight compensation pressure spring which is articulated with the other end in front of the column support on the bearing block, and that the lever arm directed to the seat support pivot axis of the Adjusting lever supported under tension on the end of an adjustable clamping screw in the seat support.

Bei dieser Ausgestaltung ist der Rückenlehnenträger nicht mit dem hinteren Ende des Sitzträgers schwenkbar verbunden, sondern unterhalb des Sitzträgers vor der Standsäule am Lagerbock abgestützt. Außerdem ist der Rückenlehnenträger unterhalb des Sitzes am Sitzträger drehbar gelagert. Die beiden Gasdruckfedern stützen sich hinter der Standsäule am Lagerbock ab und sind bis in den Bereich der Sitzträger-Schwenkachse nach vorne geführt und stützen sich am Sitzträger ab. Die Gasdruckfedern liegen ziemlich flach und werden beim Verändern der Neigung von Sitzträger und Rückenlehnenträger nicht so abgesenkt, daß zusätzlicher Platz in der Abdeckung freigehalten werden muß. Die Abdeckung kann sich daher direkt an den Lagerbock anschließen. Die Gewichtsausgleichs-Druckfeder wird zwischen die Sitzträger-Schwenkachse und die Standsäule gelegt und zwischen dem Sitzträger und dem Lagerbock angeordnet, wobei für ihre Einstellung mittels eines Einstellhebels und einer Spannschraube eine Übersetzung einbezogen werden kann. Die Verstellung des Sitzes in Richtung zur Rückenlehne und die Absenkung des vorderen Sitzbereiches bleibt erhalten und bei der Veränderung der Neigung des Rückenlehnenträgers führt die Rückenlehne eine zusätzliche Absenkbewegung in Richtung zum Sitz aus, wodurch der sogenannte "Hemdauszieheffekt" vermieden wird. Dies wird allein durch die Drehlagerung des Rückenlehnenträgers am Sitzträger und durch die drehbare Abstützung der Enden des Rückenlehnenträgers am Lagerbock unterhalb des Sitzes erreicht.In this embodiment, the backrest support is not pivotally connected to the rear end of the seat support, but is supported below the seat support in front of the pillar on the bearing block. In addition, the backrest support is rotatably mounted below the seat on the seat support. The two gas pressure springs are supported behind the pedestal on the pedestal and are guided forward to the area of the seat support pivot axis and are supported on the seat support. The gas pressure springs are fairly flat and are not lowered when changing the inclination of the seat support and backrest support so that additional space in the cover must be kept free. The cover can therefore connect directly to the bearing block. The weight compensation compression spring is placed between the seat support pivot axis and the pedestal and arranged between the seat support and the pedestal, whereby a translation can be included for their adjustment by means of an adjusting lever and a clamping screw. The adjustment of the seat in the direction of the backrest and the lowering of the front seating area is retained and at the change in the inclination of the backrest support, the backrest performs an additional lowering movement towards the seat, whereby the so-called "shirt pull-out effect" is avoided. This is achieved solely by the rotary mounting of the backrest support on the seat support and by the rotatable support of the ends of the backrest support on the bearing block below the seat.

Die Schwenkverbindung von Sitzträger und Lagerbock ist nach einer Ausgestaltung so ausgeführt, daß die Sitzträger-Schwenkachse im Lagerbock festgelegt ist und in Führungen des Sitzträgers verstellbar ist. Dabei kann vorgesehen sein, daß die Führungen als abfallende Langlöcher oder kreisbogenförmige Führungen mit zur Standfläche gerichteter konvexer Wölbung ausgebildet sind.According to one embodiment, the pivot connection of the seat carrier and bearing bracket is designed such that the seat carrier pivot axis is fixed in the bearing bracket and is adjustable in the guides of the seat carrier. It can be provided that the guides are designed as sloping elongated holes or circular-shaped guides with a convex curvature directed towards the base.

Ist zusätzlich vorgesehen, daß die der Rückenlehne zugekehrten Enden der Führungen als Rastaufnahmen für die Sitzträger-Schwenkachse ausgebildet sind, dann ist die Ausgestaltung des Sitzträgers mit dem Sitz nur durch Krafteinwirkung aufzuheben.If it is additionally provided that the ends of the guides facing the backrest are designed as snap-in receptacles for the seat support pivot axis, then the configuration of the seat support with the seat can only be lifted by the application of force.

Für die Festlegung der Neigungen von Sitzträger und Rückenlehnenträger reicht es aus, wenn vorgesehen ist, daß eine der beiden Gasdruckfedern als blockierbare Gasdruckfeder ausgebildet ist.To determine the inclinations of the seat support and backrest support, it is sufficient if it is provided that one of the two gas pressure springs is designed as a lockable gas pressure spring.

Für die Ausgestaltung und die Lagerung des Rückenlehnenträgers ist vorgesehen, daß der Rückenlehnenträger aus zwei im Abstand zueinander angeordneten Trägerrohren besteht, die mit den dem Sitzträger zugekehrten Enden mit einer Anschlußplatte verbunden sind, daß an der Anschlußplatte zwei in Richtung zur Sitzträger-Schwenkachse gerichtete Schwenkhebel angebracht sind, die mittels getrennter Sitzträger-Drehlager mit dem Sitzträger drehbar verbunden sind und sich mit ihren Enden auf einer gemeinsamen Abstützwelle des Lagerbockes abstützen.For the design and storage of the backrest support it is provided that the backrest support consists of two spaced-apart support tubes, which are connected to the ends facing the seat support with a connection plate, that on the connection plate two in the direction of Seat carrier pivot axis directed pivot levers are attached, which are rotatably connected to the seat carrier by means of separate seat carrier pivot bearings and are supported with their ends on a common support shaft of the bearing block.

Der Einbau der Gewichtsausgleichs-Druckfeder ist nach einer Ausgestaltung so ausgeführt, daß die Gewichtsausgleichs-Druckfeder zwischen dem Sitzträger und dem Lagerbock Leicht nach vorne geneigt eingebaut ist, wobei eine Gelenkwelle zwischen dem Einstellhebel und der Gewichtsausgleichs-Druckfeder zur Standsäulen-Aufnahme des Lagerbockes einen größeren Abstand aufweist, wie eine Abstützwelle zwischen der Gewichtsausgleichs-Druckfeder und dem Lagerbock.The installation of the counterbalance compression spring is carried out according to one embodiment so that the counterbalance compression spring is installed between the seat bracket and the bearing bracket inclined slightly forward, with a cardan shaft between the adjusting lever and the counterbalancing compression spring for supporting the pillar support a larger one Has a distance, such as a support shaft between the weight compensation compression spring and the bearing block.

Die Einstellmittel für die Gewichtsausgleichs-Druckfeder sind so ausgeführt, daß der Einstellhebel etwa horizontal im Sitzträger angeordnet ist, und daß die Spannschraube in einer Gewindeaufnahme des Sitzträgers verstellbar ist und sich an der Unterseite des zur Sitzträger-Schwenkachse gerichteten Hebelarmes des Einstellhebels abstützt, wobei vorgesehen ist, daß die Spannschraube durch einen Durchbruch des Lagerbockes herausgeführt und mit einer Handhabe verbunden ist.The adjusting means for the weight compensation compression spring are designed so that the adjusting lever is arranged approximately horizontally in the seat carrier, and that the clamping screw is adjustable in a threaded receptacle of the seat carrier and is supported on the underside of the lever arm of the adjusting lever directed towards the seat carrier pivot axis, provided that is that the clamping screw is brought out through an opening in the bearing block and connected with a handle.

Die Erfindung wird anhand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert. Es zeigt:

Fig. 1
einen Schnitt durch die Mittes des in Ausgangsstellung befindlichen Stuhles, der von der Vorderseite des Sitzes ausgeht und sich bis zur Rückenlehne erstreckt,
Fig. 2
einen der Fig. 1 entsprechenden Schnitt, wobei die Rückenlehne nach hinten in die Endstellung gebracht ist und die Ausgangsstellung gestrichelt eingezeichnet ist, und
Fig. 3
eine schematische Draufsicht auf den Verstellmechanismus bei abgenommenem Sitz.
The invention is explained in more detail using an exemplary embodiment shown in the drawings. It shows:
Fig. 1
a section through the middle of the chair in the starting position, which starts from the front of the seat and extends to the backrest,
Fig. 2
1 corresponding section, wherein the backrest is brought back into the end position and the starting position is shown in dashed lines, and
Fig. 3
a schematic plan view of the adjustment mechanism with the seat removed.

Bei dem Ausführungsbeispiel eines Stuhles nach den Fig. 1 bis 3 ist das Stuhlgestell mit der Standsäule nicht gezeigt. Lediglich in einem Lagerbock 10 ist eine Standsäulen-Aufnahme 11 angebracht, so daß der Lagerbock 10 mit der Standsäule des Stuhlgestelles verbunden werden kann, welche in an sich bekannter Weise eine einstellbare Hubeinrichtung enthält.In the embodiment of a chair according to FIGS. 1 to 3, the chair frame with the pedestal is not shown. Only in a pedestal 10 is a column support 11 mounted so that the pedestal 10 can be connected to the column of the chair frame, which contains an adjustable lifting device in a manner known per se.

Der Lagerbock 10 erstreckt sich zur Vorderseite des Stuhles und nimmt in vertikalen Streben eine Sitzträger-Schwenkachse 15 auf (wie Fig. 3 zeigt), die sich über die Breite des Lagerbockes 10 erst reckt und mit ihren Enden in Führungen 22 eines Sitzträgers 20 verstellbar geführt ist, wie die Fig. 1 und 2 zeigen. Die Führungen 22 sind als kreisbogenförmige Langlöcher ausgebildet, wobei die konvex gewölbte Seite der Standfläche zugekehrt ist. Die Führungen 22 fallen zur Rückseite des Stuhles hin ab und sind an den zugeordneten Enden selbst als Rastaufnahmen für die Sitzträger-Schwenkachse 15 ausgebildet, so daß die in Fig. 1 dargestellte Ausgangsstellung des Sitzes 30 eingehalten wird und nur durch Krafteinwirkung aufgehoben werden kann. Dies ist der Fall, wenn der Sitzträger 20 mit dem darauf befestigten Sitz 30 hinten abgesenkt wird und seine Neigung ändert. Dabei wird ein Rückenlehnenträger mit einer Rückenlehne 33 in seiner Neigung überproportional verändert, wie der Fig. 2 zu entnehmen ist. Außerdem wird die Rückenlehne 33 in Richtung zum Sitz 30 abgesenkt, wie die Abstände a und b in Fig. 2 zeigen. Dieser Bewegungsablauf ist mit einer begrenzten Verstellung des Sitzträgers 20 in Richtung zur Rückenlehne 33 und mit einer begrenzten Absenkung des vorderen Sitzbereiches, wie der Abstand c zeigt. In Fig. 2 ist die Ausgangsstellung des Stuhles gestrichelt gezeichnet, während die maximale Veränderung der Neigung von Sitzträger 20 und Rückenlehnenträger durch die ausgezogen gezeichnete Endstellung wiedergegeben ist. Um diesen Bewegungsablauf sicherzustellen, ist unterhalb des Sitzes 30 ein Verstellmechanismus angeordnet, der neben dem Lagerbock 10 und dem Sitzträger 20 eine Federanordnung mit zwei Gasdruckfedern 25 und 25' sowie eine Gewichtsausgleichs-Druckfeder 27 umfaßt. Der Rückenlehnenträger umfaßt zwei beabstandete Rohrabschnitte 32, an denen die Rückenlehne 33 befestigt ist und die unterhalb dem Sitz 30 geführt sind. Dort sind sie auch unterhalb des Sitzträgers 20 an einer Anschlußplatte 34 befestigt, an der zwei zur Vorderseite des Stuhles gerichtete Schwenkhebel 31 abgehen, die mittels getrennter Sitzträger-Schwenklager 21 am Sitzträger 20 drehbar gelagert sind, wie der schematischen Darstellung in Fig. 3 zu entnehmen ist. Diese Sitzträger-Drehlager 21 sind im Bereich der Standsäulen-Aufnahme 11 des Lagerbockes 10, d.h. etwa im mittleren Bereich des Sitzes 30. Die Enden der Schwenkhebel 31 sind nach den Sitzträger-Drehlagern 21 etwas zur Standfläche abgewinkelt und zwischen der Standsäulen-Aufnahme 11 und der Sitzträger-Schwenkachse 15 am Lagerbock 10 drehbar abgestützt, wie die durchgehende Abstützwelle 13 zeigt, die in vertikalen Stegen des Lagerbockes 10 gelagert ist.The bearing block 10 extends to the front of the chair and accommodates a seat support pivot axis 15 in vertical struts (as shown in FIG. 3), which first stretches across the width of the bearing block 10 and is adjustable with its ends in guides 22 of a seat support 20 is as shown in FIGS. 1 and 2. The guides 22 are designed as circular arc-shaped elongated holes, with the convexly curved side facing the standing surface. The guides 22 drop towards the back of the chair and are themselves formed at the associated ends as locking receptacles for the seat support pivot axis 15, so that the starting position of the seat 30 shown in FIG. 1 is maintained and can only be lifted by the application of force. This is the case when the seat support 20 with the seat 30 fastened thereon is lowered at the rear and changes its inclination. A backrest support with a backrest 33 is disproportionately changed in its inclination, as can be seen in FIG. 2. In addition, the The backrest 33 is lowered in the direction of the seat 30, as the distances a and b show in FIG. 2. This sequence of movements is with a limited adjustment of the seat support 20 in the direction of the backrest 33 and with a limited lowering of the front seat area, as the distance c shows. In Fig. 2 the starting position of the chair is shown in dashed lines, while the maximum change in the inclination of the seat support 20 and backrest support is shown by the drawn end position. In order to ensure this sequence of movements, an adjustment mechanism is arranged below the seat 30, which, in addition to the bearing block 10 and the seat support 20, comprises a spring arrangement with two gas pressure springs 25 and 25 'and a weight compensation compression spring 27. The backrest support comprises two spaced tube sections 32, to which the backrest 33 is fastened and which are guided below the seat 30. There they are also attached below the seat support 20 to a connecting plate 34, on which two pivot levers 31 directed towards the front of the chair come out, which are rotatably mounted on the seat support 20 by means of separate seat support pivot bearings 21, as can be seen from the schematic illustration in FIG. 3 is. These seat support pivot bearings 21 are in the area of the support pillar receptacle 11 of the pedestal 10, that is to say approximately in the central area of the seat 30. The ends of the pivot levers 31 are angled slightly behind the seat support pivot supports 21 and between the support pillar receptacle 11 and the seat support pivot axis 15 is rotatably supported on the pedestal 10, as the continuous support shaft 13 shows, which is mounted in vertical webs of the pedestal 10.

Die Federanordnung weist die beiden Gasdruckfedern 25 und 25' auf, die symmetrisch zu bei den Seiten der Standsäulen-Aufnahme 11 angeordnet sind. Beide Gasdruckfedern 25 und 25' stützen sich über die Schwenklager 14 hinter der Standsäulen-Aufnahme 11 am Lagerbock 10 ab. Die anderen Enden der Gasdruckfedern 25 und 25' sind bis in den Bereich der Sitzträger-Schwenkachse 15 nach vorne geführt und stützen sich auf Abstützwellen 23 ab, die in vertikalen Stegen des Sitzträgers 20 gelagert sind. Die Gasdruckfeder 25' ist blockierbar, um in bekannter Weise die eingestellten Neigungen von Sitzträger 20 und Rückenlehnenträger festlegen zu können.The spring arrangement has the two gas pressure springs 25 and 25 ', which are symmetrical to the sides of the column support 11 are arranged. Both gas pressure springs 25 and 25 'are supported on the bearing block 10 via the swivel bearings 14 behind the column support 11. The other ends of the gas pressure springs 25 and 25 'are guided forward into the region of the seat support pivot axis 15 and are supported on support shafts 23 which are mounted in vertical webs of the seat support 20. The gas pressure spring 25 'can be blocked in order to be able to set the inclinations of the seat support 20 and backrest support in a known manner.

Für den Gewichtsausgleich ist eine Gewichtsausgleichs-Druckfeder 27 vorgesehen, die zwischen der Sitzträger-Schwenkachse 15 und der Standsäulen-Aufnahme 11 des Lagerbockes 10 angeordnet ist. Das untere Ende der leicht nach vorne geneigten Gewichtsausgleichs-Druckfeder 27 stützt sich auf einer Abstützwelle 16 gelenkig ab, die vor der Standsäulen-Aufnahme 11 im Lagerbock 10 festgelegt ist. Das obere Ende der Gewichtsausgleichs-Druckfeder 27 ist auf einer Gelenkwelle 28 drehbar gelagert, die Teil eines zweiarmigen Einstellhebels 26 ist. Dieser Einstellhebel 26 ist nahezu horizontal in dem Sitzträger 20 drehbar gelagert, wie die Lagerachse 24 zeigt. Der Einstellhebel 26 ist parallel zu den Gasdruckfedern 25 und 25' ausgerichtet und liegt in der Mittelebene der Fig. 3, d.h. in der Sitzmittelachse. Der zur Sitzträger-Schwenkachse 15 gerichtete Hebelarm des Einstellhebels 26 liegt unter der Kraft der Gewichtsausgleichs-Druckfeder 27 auf dem Ende einer Spannschraube 29, die in einer Gewindeaufnahme 15 des Sitzträgers 20 verstellbar ist. Der Lagerbock 10 hat einen Durchbruch 12, durch den die Spannschraube 29 herausgeführt und mit einer Handhabe versehen ist. Mit der Spannschraube 29 kann der Einstellhebel 26 verschwenkt und so die Verspannung der Gewichtsausgleichs-Druckfeder 27 verändert werden. Die Gewichtsausgleichs-Druckfeder 27 übt dann am Sitzträger 20 ein Drehmoment aus, das dem durch die Belastung des Sitzes 30 ausgelösten Drehmoment entgegenwirkt.For the weight compensation, a weight compensation compression spring 27 is provided, which is arranged between the seat support pivot axis 15 and the column support 11 of the bearing block 10. The lower end of the weight compensation compression spring 27, which is inclined slightly forward, is supported in an articulated manner on a support shaft 16, which is fixed in front of the pillar receptacle 11 in the bearing block 10. The upper end of the counterbalance compression spring 27 is rotatably mounted on an articulated shaft 28 which is part of a two-armed adjusting lever 26. This adjusting lever 26 is rotatably mounted almost horizontally in the seat support 20, as the bearing axis 24 shows. The adjusting lever 26 is aligned parallel to the gas pressure springs 25 and 25 'and lies in the center plane of FIG. 3, ie in the center axis of the seat. The lever arm of the adjusting lever 26 directed towards the seat support pivot axis 15 is under the force of the weight compensation compression spring 27 on the end of a clamping screw 29 which is adjustable in a threaded receptacle 15 of the seat support 20. The bearing block 10 has an opening 12 through which the clamping screw 29 is led out and is provided with a handle. With the clamping screw 29, the adjusting lever 26 can be pivoted and the tensioning of the weight compensation compression spring 27 can be changed. The weight compensation compression spring 27 then exercises on the seat support 20 a torque that counteracts the torque triggered by the load on the seat 30.

Der Verstellmechanismus nimmt unterhalb des Sitzes 30 nur wenig Raum ein, der zur Standfläche hin durch den Lagerbock 10 begrenzt ist. Da keine Federn aus diesem Raum ausschwenken, kann die Abdeckung direkt an den Lagerbock 10 anschließen.The adjustment mechanism takes up little space below the seat 30, which is limited to the base area by the bearing block 10. Since no springs swing out of this space, the cover can connect directly to the bearing block 10.

Claims (9)

Stuhl, insbesondere Arbeits- oder Bürostuhl, mit einem im vorderen Bereich um eine horizontale Sitzträger-Schwenkachse schwenkbaren und in der Neigung veränderbaren Sitzträger mit Sitz und einem in Abhängigkeit von der Neigungsänderung des Sitzträgers zwangsweise überproportional in der Neigung veränderbaren Rückenlehnenträger mit Rückenlehne, bei dem mit zunehmender Neigung des Sitzträgers dieser in Richtung zur Rückenlehne begrenzt verstellbar und mit seinem vorderen Bereich begrenzt absenkbar ist, wobei die Sitzträger-Schwenkachse in nach rückwärts abfallenden Führungen verstellbar geführt ist, bei dem der Rückenlehnenträger unter den Sitz geführt und am Sitzträger drehbar gelagert ist, bei dem der Rückenlehnenträger über dieses Sitzträger-Drehlager hinaus in Richtung zur Sitzträger-Schwenkachse verlängert ist und sich mit seinem Ende gelenkig am Lagerbock abstützt und bei dem der Lagerbock mit einer Standsäulen-Aufnahme für die Standsäule des Stuhlgestelles versehen ist,
dadurch gekennzeichnet,
daß auf beiden Seiten der Standsäulen-Aufnahme (11) des Lagerbockes (10) jeweils eine Gasdruckfeder (25,25') angeordnet ist,
daß sich die einen Enden der Gasdruckfedern (25,25') hinter der Standsäulen-Aufnahme (11) am Lagerbock (10) gelenkig abstützen,
daß sich die anderen Enden der Gasdruckfedern (25,25') im Bereich der Stitzträger-Schwenkachse (15) am Sitzträger (20) gelenkig abstützen,
daß zwischen der Sitzträger-Schwenkachse (15) und der Standsäulen-Aufnahme (11) ein zweiarmiger Einstellhebel (26) mit einer horizontalen Lagerachse (24) am Sitzträger (20) drehbar gelagert ist,
daß der zur Rückenlehne (33) gerichtete Hebelarm des Einstellhebels (26) gelenkig mit einem Ende einer Gewichtsausgleichs-Druckfeder (27) verbunden ist, die sich mit dem anderen Ende vor der Standsäulen-Aufnahme (11) am Lagerbock (10) gelenkig abstützt, und
daß sich der zur Sitzträger-Schwenkachse (15) gerichtete Hebelarm des Einstellhebels (26) unter Spannung auf dem Ende einer im Sitzträger (20) verstellbaren Spannschraube (29) abstützt.Chair, in particular work or office chair, with a seat support with seat that can be swiveled in the front area about a horizontal pivoting pivot axis and the inclination of which can be changed, and a backrest support with backrest which can be changed disproportionately depending on the change in inclination of the seat support, with the increasing inclination of the seat support is adjustable to the backrest to a limited extent and its front area can be lowered to a limited extent, the seat support pivot axis being adjustable in guides that drop backwards, in which the backrest support is guided under the seat and rotatably mounted on the seat support, at which the backrest support is extended beyond this seat support pivot bearing in the direction of the seat support pivot axis and is articulated with its end supported on the pedestal and in which the pedestal with a column support for the column of the Stuhlg is provided,
characterized,
that a gas pressure spring (25, 25 ') is arranged on each side of the pillar support (11) of the bearing block (10),
that the one ends of the gas pressure springs (25, 25 ') are supported in an articulated manner behind the pedestal support (11) on the bearing block (10),
that the other ends of the gas pressure springs (25, 25 ') are supported in an articulated manner on the seat support (20) in the region of the seat support pivot axis (15),
that a two-armed adjusting lever (26) with a horizontal bearing axis (24) is rotatably mounted on the seat support (20) between the seat support pivot axis (15) and the support column holder (11),
that the lever arm of the adjusting lever (26) directed towards the backrest (33) is connected in an articulated manner to one end of a weight compensation compression spring (27) which is supported on the bearing block (10) in an articulated manner at the other end in front of the pillar holder (11), and
that the lever arm of the adjusting lever (26) directed towards the seat support pivot axis (15) is supported under tension on the end of an adjustable screw (29) in the seat support (20). Stuhl nach Anspruch 1,
dadurch gekennzeichnet,
daß die Sitzträger-Schwenkachse (15) im Lagerbock (10) festgelegt ist und in Führungen (22) des Sitzträgers (20) verstellbar ist.Chair according to claim 1,
characterized,
that the seat support pivot axis (15) is fixed in the bearing block (10) and is adjustable in guides (22) of the seat support (20). Stuhl nach Anspruch 1 oder 2,
dadurch gekennzeichnet,
daß die Führungen (22) als abfallende Langlöcher oder kreisbogenförmige Führungen (22) mit zur Standfläche gerichteter konvexer Wölbung ausgebildet sind.Chair according to claim 1 or 2,
characterized,
that the guides (22) are designed as sloping elongated holes or circular-shaped guides (22) with a convex curvature directed towards the base. Stuhl nach einem der Ansprüche 1 bis 3,
dadurch gekennzeichnet,
daß die der Rückenlehne (33) zugekehrten Enden der Führungen (22) als Rastaufnahmen für die Sitzträger-Schwenkachse (15) ausgebildet sind.Chair according to one of claims 1 to 3,
characterized,
that the backrest (33) facing ends of the guides (22) are designed as locking receptacles for the seat support pivot axis (15). Stuhl nach einem der Ansprüche 1 bis 4,
dadurch gekennzeichnet,
daß eine der beiden Gasdruckfedern (z.B. 25') als blockierbare Gasdruckfeder ausgebildet ist.Chair according to one of claims 1 to 4,
characterized,
that one of the two gas pressure springs (eg 25 ') is designed as a lockable gas pressure spring. Stuhl nach einem der Ansprüche 1 bis 5,
dadurch gekennzeichnet,
daß der Rückenlehnenträger aus zwei im Abstand zueinander angeordneten Trägerrohren (32) besteht, die mit den dem Sitzträger (20) zugekehrten Enden mit einer Anschlußplatte (34) verbunden sind,
daß an der Anschlußplatte (34) zwei in Richtung zur Sitzträger-Schwenkachse (15) gerichtete Schwenkhebel (31) angebracht sind, die mittels getrennter Sitzträger-Drehlager (21) mit dem Sitzträger (20) drehbar verbunden sind und sich mit ihren Enden auf einer gemeinsamen Abstützwelle (13) des Lagerbockes (10) abstützen.Chair according to one of claims 1 to 5,
characterized,
that the backrest support consists of two support tubes (32) which are arranged at a distance from one another and are connected to the ends facing the seat support (20) with a connecting plate (34),
that on the connection plate (34) two in the direction of the seat support pivot axis (15) directed pivot lever (31) are attached, which are rotatably connected to the seat support (20) by means of separate seat support pivot bearings (21) and with their ends on one Support common support shaft (13) of the pedestal (10). Stuhl nach einem der Ansprüche 1 bis 6,
dadurch gekennzeichnet,
daß die Gewichtsausgleichs-Druckfeder (27) zwischen dem Sitzträger (20) und dem Lagerbock (10) leicht nach vorne geneigt eingebaut ist, wobei eine Gelenkwelle (28) zwischen dem Einstellhebel (26) und der Gewichtsausgleichs-Druckfeder (27) zur Standsäulen-Aufnahme (11) des Lagerbockes (10) einen größeren Abstand aufweist, wie eine Abstützwelle (16) zwischen der Gewichtsausgleichs-Druckfeder (27) und dem Lagerbock (10).Chair according to one of claims 1 to 6,
characterized,
that the weight compensation compression spring (27) is installed between the seat support (20) and the bearing block (10) inclined slightly to the front, an articulated shaft (28) between the adjusting lever (26) and the weight compensation compression spring (27) to the column admission (11) of the bearing block (10) has a greater distance, such as a support shaft (16) between the weight compensation compression spring (27) and the bearing block (10). Stuhl nach einem der Ansprüche 1 bis 7,
dadurch gekennzeichnet,
daß der Einstellhebel (26) etwa horizontal im Sitzträger (20) angeordnet ist, und
daß die Spannschraube (29) in einer Gewindeaufnahme (35) des Sitzträgers (20) verstellbar ist und sich an der Unterseite des zur Sitzträger-Schwenkachse (15) gerichteten Hebelarmes des Einstellhebels (26) abstützt.Chair according to one of claims 1 to 7,
characterized,
that the adjusting lever (26) is arranged approximately horizontally in the seat support (20), and
that the clamping screw (29) is adjustable in a threaded receptacle (35) of the seat support (20) and is supported on the underside of the lever arm of the adjusting lever (26) directed towards the seat support pivot axis (15). Stuhl nach einem der Ansprüche 1 bis 8,
dadurch gekennzeichnet,
daß die Spannschraube (29) durch einen Durchbruch (12) des Lagerbockes (10) herausgeführt und mit einer Handhabe verbunden ist.Chair according to one of claims 1 to 8,
characterized,
that the clamping screw (29) is led out through an opening (12) in the bearing block (10) and is connected to a handle.
EP92122013A 1992-03-18 1992-12-24 Office chair Expired - Lifetime EP0561059B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4208648A DE4208648C1 (en) 1992-03-18 1992-03-18
DE4208648 1992-03-18

Publications (2)

Publication Number Publication Date
EP0561059A1 true EP0561059A1 (en) 1993-09-22
EP0561059B1 EP0561059B1 (en) 1996-07-17

Family

ID=6454356

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92122013A Expired - Lifetime EP0561059B1 (en) 1992-03-18 1992-12-24 Office chair

Country Status (3)

Country Link
EP (1) EP0561059B1 (en)
DE (1) DE4208648C1 (en)
ES (1) ES2090474T3 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2293971A (en) * 1994-10-11 1996-04-17 Kusch Co Sitzmoebel Seating furniture
ES2142185A1 (en) * 1996-02-02 2000-04-01 Ind Y Fundiciones Iglesias S A Improvements to systems for regulating the tilt of the back and seat of armchairs
GB2333955B (en) * 1998-02-04 2002-03-13 Unit Press Ltd Mechanism for chair
WO2002032261A2 (en) 2000-10-18 2002-04-25 Röder Haworth Büro-Sitzmöbel Gmbh Office chair
GB2397759A (en) * 2002-12-31 2004-08-04 Metalseat Srl Device for adjusting the spring force of a helical compression spring in an articulated office chair

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19702328A1 (en) * 1997-01-23 1998-07-30 Comforto Gmbh Chair with synchronous mechanism
DE10123231C2 (en) * 2001-05-12 2003-05-15 Roeder Haworth Buero Sitzmoebe office chair
DE202009006922U1 (en) 2009-05-13 2010-09-23 Bock 1 Gmbh & Co. Kg synchronous mechanism
NO335007B1 (en) * 2012-12-19 2014-08-25 Scandinavian Business Seating AS Device for tilting chair for chair
CN107666843A (en) 2015-03-14 2018-02-06 赫尔曼米勒有限公司 For the mechanical structure sub-assembly of chair and the chair with this mechanical structure sub-assembly
DE102016104638A1 (en) 2016-03-14 2017-09-14 Burkhard Schmitz chair
IT201700031737A1 (en) * 2017-03-22 2018-09-22 Co Fe Mo Ind S R L ARTICULATION SYSTEM FOR CHAIRS
FR3066084B1 (en) * 2017-05-15 2019-12-27 Ggi Ameublement De Bureaux DAMPING DEVICE FOR RECLINING SEAT BACKREST AND DEVICE FOR ADJUSTING TILT OF THE ASSOCIATED SEAT

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3617539C1 (en) * 1986-05-24 1987-07-23 Grammer Sitzsysteme Gmbh Seat with adjustable seat plate and reclining backrest
DE3916474A1 (en) * 1989-05-20 1990-11-22 Roeder Soehne Sitzmoebelfab CHAIR, ESPECIALLY WORK OR OFFICE CHAIR

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4020868C1 (en) * 1990-05-01 1992-02-06 Roeder Gmbh Sitzmoebelwerke, 6000 Frankfurt, De

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3617539C1 (en) * 1986-05-24 1987-07-23 Grammer Sitzsysteme Gmbh Seat with adjustable seat plate and reclining backrest
DE3916474A1 (en) * 1989-05-20 1990-11-22 Roeder Soehne Sitzmoebelfab CHAIR, ESPECIALLY WORK OR OFFICE CHAIR

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2293971A (en) * 1994-10-11 1996-04-17 Kusch Co Sitzmoebel Seating furniture
GB2293971B (en) * 1994-10-11 1998-04-01 Kusch Co Sitzmoebel Adjustable seating furniture
ES2142185A1 (en) * 1996-02-02 2000-04-01 Ind Y Fundiciones Iglesias S A Improvements to systems for regulating the tilt of the back and seat of armchairs
GB2333955B (en) * 1998-02-04 2002-03-13 Unit Press Ltd Mechanism for chair
WO2002032261A2 (en) 2000-10-18 2002-04-25 Röder Haworth Büro-Sitzmöbel Gmbh Office chair
GB2397759A (en) * 2002-12-31 2004-08-04 Metalseat Srl Device for adjusting the spring force of a helical compression spring in an articulated office chair
GB2397759B (en) * 2002-12-31 2005-11-23 Metalseat Srl Device for the adjustment of the compression force of the spring in an articulation for a chair

Also Published As

Publication number Publication date
ES2090474T3 (en) 1996-10-16
DE4208648C1 (en) 1993-05-27
EP0561059B1 (en) 1996-07-17

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