EP0259609B1 - Chair - Google Patents

Chair Download PDF

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Publication number
EP0259609B1
EP0259609B1 EP87111319A EP87111319A EP0259609B1 EP 0259609 B1 EP0259609 B1 EP 0259609B1 EP 87111319 A EP87111319 A EP 87111319A EP 87111319 A EP87111319 A EP 87111319A EP 0259609 B1 EP0259609 B1 EP 0259609B1
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EP
European Patent Office
Prior art keywords
seat
chair
shell
support
back shell
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP87111319A
Other languages
German (de)
French (fr)
Other versions
EP0259609A3 (en
EP0259609A2 (en
Inventor
Fritz Makiol
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.)
Girsberger Holding AG
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Girsberger Holding AG
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Application filed by Girsberger Holding AG filed Critical Girsberger Holding AG
Priority to AT87111319T priority Critical patent/ATE70956T1/en
Publication of EP0259609A2 publication Critical patent/EP0259609A2/en
Publication of EP0259609A3 publication Critical patent/EP0259609A3/en
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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • 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
    • 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
    • A47C1/03274—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 of torsion type
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S297/00—Chairs and seats
    • Y10S297/02—Molded

Definitions

  • the invention relates to a chair, in particular an office swivel chair with an adjustable seat and an adjustable backrest connected in an articulated manner thereto, the seat and the backrest having a seat shell or a back shell provided with upholstery, and a foot having a standpipe and a support .
  • a chair is known from GB-A-2143730.
  • Such a known office chair has a support structure with a support frame between the support and the seat or the seat shell, this support frame being able to transmit the forces occurring in a person sitting on the chair from the seat shell or the back shell to the support.
  • This substructure leads to a comparatively large construction volume and also requires a corresponding manufacturing and assembly effort.
  • the narrowest possible side silhouette is often desired in such chairs.
  • the object of the present invention is to provide an office chair of the type mentioned at the outset, its construction and manufacturing is simplified, but at the same time, while maintaining the usual adjustability, an overall low overall height or thickness is possible both in the seating area and in the backrest area.
  • bitzschale and the back shell are connected to one another by a joint which in the separating area has joint parts which act directly on the shells and are formed by molding on the mutually facing end faces of the shells, and that the seat shell and the back shell are designed as self-supporting support parts directly connected to the support.
  • the structural thickness in the area of the seat, under which the adjustment mechanism is also located can be considerably reduced, since the complex supporting substructure with a frame can be omitted by taking over the supporting function through the seat shell itself.
  • the like with the standpipe. connected support a seat support part connected to the seat shell via a swivel joint and a rigid part or the like, in particular rigidly connected to the back shell. as well as a back support part connected to the seat support part via a rotary / sliding bearing.
  • the seat can be adjusted around the swivel joint, with the backrest also changing the angle at the same time between seat and backrest, this movement follows.
  • the back shell is formed in two parts with a pelvic or lumbar part, which preferably extends approximately over the width of the seat, and a shoulder part, the two back shell parts being pivotable relative to one another from a stop position against spring support.
  • the pelvic or lumbar part at least partially takes on the function of an otherwise required back support.
  • the subdivision of the back shell allows an exact adjustment to the respective sitting position of a person using the chair.
  • the seat support part of the support has a spring for resetting the seat, preferably a torsion spring, at the swivel joint at its front end. Such torsion suspension can be accommodated in a space-saving manner, so that this construction also contributes to a low overall height in the seating area.
  • one or more return springs supporting the seat return spring preferably pressure springs engaging on the underside, are provided between the seat shell and the back shell or the lumbar part.
  • the torsion springs and the return springs together ensure that the seat and the backrest come to an upper or front position when the seat mechanism is released and the seat is relieved. Due to the division into two spring groups, the respective springs can be made comparatively small, so that this in turn also contributes to a low overall height.
  • a chair 1 (FIG. 1) is designed as an office swivel chair and essentially has a base 2, a support 4 fastened to its stand tube 3, a seat 5 and a backrest 6.
  • the seat 5 and the backrest 6 are provided with a removable padding 7, under which there is a seat shell 8 or a back shell 9, as can be clearly seen in FIG. 3.
  • the seat shell and preferably also the back shell are designed as carrier parts directly connected to the support 4. They therefore also take on the function of a supporting substructure, so that such is not necessary in the chair according to the invention.
  • the shells are arched to achieve the required strength and have bead-like stiffening formations 10 in their outer edge areas and also in the area of the intermediate surfaces.
  • the stiffening formations are preferably molded on the inside, facing the padding 7, so that the shells can be smooth on the outside without disruptive projections.
  • the seat shell 8 and the back shell 9 are connected to one another in their separating region 11 via joints 12.
  • formations 13 are provided on the shells 8, 9 at the mutually facing end faces to form approximately flange-shaped joint parts.
  • Insert pins 14 inserted from the side form the hinge axes.
  • FIGS. 2 and 4 also clearly show that the shells are designed to interlock with one another at their facing ends, so that there is practically no intermediate gap in the separating region 11.
  • the support 4 has a seat support part 16 which is connected to the seat shell via a swivel joint 15 and which on the other hand is connected to the standpipe 3.
  • the support has a back support part 18, which is in particular rigidly connected to the back shell 9 and is connected to the other support part 16 at its end facing away from the back shell via a rotary / sliding bearing 17. 2 and 4 it is indicated that this rotary / sliding bearing essentially has a sliding slot 19 in the seat support part 16 and a cross bolt 20 extending through this slot in the back support part 18.
  • This arrangement ensures, in a manner known per se, that the seat moves somewhat in the same direction with this movement when the backrest is adjusted.
  • the further adjustment and locking mechanism is not shown in the drawings for the sake of simplicity.
  • the seat support part 16 of the support 4 has a torsion suspension 21 at its front end at the swivel joint 15 for returning the seat to an upper position.
  • This torsion suspension 21 adjusts the seat 5 about the swivel joint 15 in the direction of arrow Pf 1 (FIG. 1) when the adjustment mechanism is unlocked.
  • the backrest 6 is also pivoted in the direction of the arrow Pf 2.
  • Fig. 4 clearly shows that between the seat shell 8 and the back shell 9, the above-mentioned seat return movement supporting return springs 22 are provided. These are attached on the underside and designed as compression springs. They lie within a support cladding, which is omitted in FIG. 4. As already mentioned, the return springs 22 act in the same direction as the torsion spring 21. This division into several spring groups allows the individual springs to be kept very small, so that they can also be accommodated well within a flat support and adjustment mechanism.
  • the backrest 6 is formed in two parts with a pelvic or lumbar part 23 and a shoulder part 24 adjoining it upwards.
  • the back shell parts 23, 24 are pivotally connected to one another over a specific area.
  • a spring support with springs 25 holds the shoulder part 24 against stops 26 in a forward pivoting position. When leaning against the shoulder part 24, this can then be pivoted somewhat backwards against the spring support, so that an adaptation to the respective sitting position of a user is possible.
  • the back shell parts 23 and 24 are connected to one another via joints 28 located on their side edges 27.
  • connection points for fastening armrests 29 which can be seen in FIG. 1 and which can be attached if necessary.
  • Fig. 3 it can also be clearly seen that the pelvic or lumbar part 23 extends over the entire width of the seat.
  • the seat shell 8 and the back shell 9 with the pelvic part 23 and the shoulder part 24 preferably consist of glass mat-reinforced, thermoplastic material, preferably of reinforced polypropylene. As a result, the shells can be produced in one piece in one operation.

Landscapes

  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
  • Seats For Vehicles (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Abstract

A swivel chair has a leg with a support at the upper end of its upright column and two shells which are articulately connected to each other and at least one of which is articulately connected directly to the support. The one shell carries a cushion and forms therewith the seat of the chair. The other shell is assembled of two sections which are pivotable relative to each other about a horizontal axis, one of which supports the lumbar region of the body of the occupant of the chair and the other of which serves as a shoulder support. The one section is articulately connected to the rear portion of the one shell by two hinges.

Description

Die Erfindung betrifft einen Stuhl, insbesondere einen Bürodrehstuhl mit einem verstellbaren Sitz und einer gelenkig damit verbundenen, verstellbaren Rückenlehne, wobei der Sitz und die Rückenlehne eine mit einer Polsterung versehene Sitzschale bzw. eine Rückenschale aufweisen, sowie mit einem ein Standrohr und einen Support aufweisenden Fuß. Durch die GB-A-2143730 ist ein solcher Stuhl bekannt.The invention relates to a chair, in particular an office swivel chair with an adjustable seat and an adjustable backrest connected in an articulated manner thereto, the seat and the backrest having a seat shell or a back shell provided with upholstery, and a foot having a standpipe and a support . Such a chair is known from GB-A-2143730.

Ein solcher, bekannter Bürostuhl weist eine Tragekonstruktion mit einem Trägerrahmen zwischen dem Support und dem Sitz bzw. der Sitzschale auf, wobei dieser Trägerrahmen die auftretenden Kräfte bei einer auf dem Stuhl sitzenden Person von der Sitzschale bzw. der Rückenschale auf den Support übertragen kann. Diese Unterkonstruktion führt zu einem vergleichsweise großen Bauvolumen und erfordert auch einen entsprechenden Herstellungs- und Montageaufwand.
Häufig ist bei solchen Stühlen eine möglichst schmale Seitensilhouette erwünscht. Dabei soll aber gleichzeitig durch eine entsprechende Verstellmeachnik auch eine vielfache Verstellbarkeit des Sitzes und der Rückenlehne möglich sein. Dies läßt sich jedoch bei der bekannten Konstruktion nicht in dem erwünschten Maße realisieren.Such a known office chair has a support structure with a support frame between the support and the seat or the seat shell, this support frame being able to transmit the forces occurring in a person sitting on the chair from the seat shell or the back shell to the support. This substructure leads to a comparatively large construction volume and also requires a corresponding manufacturing and assembly effort.
The narrowest possible side silhouette is often desired in such chairs. At the same time, however, it should also be possible to adjust the seat and the backrest in multiple ways by means of an appropriate adjustment mechanism. However, this cannot be achieved to the desired extent in the known construction.

Aufgabe der vorliegenden Erfindung ist es, einen Bürostuhl der eingangs erwähnten Art zu schaffen, dessen Konstruktion und Fertigung vereinfacht ist, wobei gleichzeitig aber auch, unter Beibehaltung der üblichen Einstellbarkeit, eine insgesamt geringe Bauhöhe bzw. Dicke sowohl im Sitzbereich als auch im Rückenlehnenbereich möglich ist.The object of the present invention is to provide an office chair of the type mentioned at the outset, its construction and manufacturing is simplified, but at the same time, while maintaining the usual adjustability, an overall low overall height or thickness is possible both in the seating area and in the backrest area.

Zur Lösung dieser Aufgabe wird erfindungsgemäß vorgeschlagen, daß die bitzschale und die Rückenschale über ein Gelenk miteinander verbunden sind, welches im Trennbereich unmittelbar an den Schalen angreifende, durch Anformungen an den zueinander weisenden Stirnseiten der Schalen gebildete Gelenkteile aufweist, und daß die Sitzschale und die Rückenschale als selbstragende, unmittelbar mit dem Support verbundene Trägerteile ausgebildet sind.
Dadurch kann die Baudicke im Bereich des Sitzes, unter dem sich auch die Verstellmechanik befindet, erheblich reduziert werden, da durch die Übernahme der Tragfunktion durch die Sitzschale selbst, die aufwendige Stütz-Unterkonstruktion mit einem Rahmen entfallen kann.To achieve this object, it is proposed according to the invention that the bitzschale and the back shell are connected to one another by a joint which in the separating area has joint parts which act directly on the shells and are formed by molding on the mutually facing end faces of the shells, and that the seat shell and the back shell are designed as self-supporting support parts directly connected to the support.
As a result, the structural thickness in the area of the seat, under which the adjustment mechanism is also located, can be considerably reduced, since the complex supporting substructure with a frame can be omitted by taking over the supporting function through the seat shell itself.

Eine sonst übliche, über die Rückseite vorstehende Rückenstütze kann dadurch vermieden werden, so daß die erwünschte, schmale Seitensilhouette sich vom Sitzbereich in den Rückenlehnenbereich fortsetzen kann. Außerdem ist dadurch auch bei der Rückenlehne ein einfacherer Aufbau möglich.An otherwise usual back support protruding from the back can be avoided, so that the desired, narrow side silhouette can continue from the seating area into the backrest area. This also enables a simpler structure for the backrest.

Zweckmäßigerweise weist der mit dem Standrohr od.dgl. verbundene Support ein mit der Sitzschale über ein Schwenkgelenk verbundenes Sitzträgerteil sowie ein insbesondere starr mit der Rückenschale od.dgl. sowie über eine Dreh-Schiebelagerung mit dem Sitzträgerteil verbundenes Rückenträgerteil auf. Durch diese Anordnung ist der Sitz um das Schwenkgelenk verstellbar, wobei gleichzeitig auch die Rückenlehne unter gleichzeitiger Veränderung des Winkels zwischen Sitz und Rückenlehne, diese Bewegung mitmacht.Advantageously, the like with the standpipe. connected support a seat support part connected to the seat shell via a swivel joint and a rigid part or the like, in particular rigidly connected to the back shell. as well as a back support part connected to the seat support part via a rotary / sliding bearing. With this arrangement, the seat can be adjusted around the swivel joint, with the backrest also changing the angle at the same time between seat and backrest, this movement follows.

Eine Ausführungsform sieht vor, daß die Rückenschale zweiteilig mit einem sich vorzugsweise etwa über die Breite des Sitzes erstreckenden Becken- oder Lumbalteil sowie einem Schulterteil ausgebildet ist, wobei die beiden Rückenschalenteile aus einer Anschlagstellung gegen eine Federabstützung relativ zueinander verschwenkbar sind. Das Becken-oder Lumbalteil übernimmt hierbei zumindest teilweise die Funktion einer sonst erforderlichen Rückenstütze. Durch die Unterteilung der Rückenschale ist eine genaue Anpassung an die jeweilige Sitzposition einer den Stuhl benützenden Person vorhanden.
Eine Weiterbildung der Erfindung sieht vor, daß das Sitzträgerteil des Supports an seinem vorderen Ende bei dem Schwenkgelenk eine Federung zur Sitzrückstellung, vorzugsweise eine Torsionsfederung aufweist. Eine solche Torsionsfederung läßt sich platzsparend unterbringen, so daß auch diese Konstruktion zu einer geringen Bauhöhe im Sitzbereich beiträgt.
Besonders vorteilhaft ist es, wenn zwischen der Sitzschale und der Rückenschale bzw. dem Lumbalteil eine oder mehrere, die Sitzrückstellfederung unterstützende Rückstellfedern, vorzugsweise unterseitig angreifende Druckfedern vorgesehen sind. Die Torsionsfederung und die Rückstellfedern sorgen zusammen dafür, daß der Sitz und die Lehne bei ausgelöster Sitzmechanik und entlastetem Sitz in eine obere bzw. vordere Stellung gelangt. Durch die Aufteilung in zwei Federgruppen können die jeweiligen Federn vergleichsweise klein ausgebildet sein, so daß auch dies wiederum insgesamt zu einer geringen Bauhöhe beiträgt.One embodiment provides that the back shell is formed in two parts with a pelvic or lumbar part, which preferably extends approximately over the width of the seat, and a shoulder part, the two back shell parts being pivotable relative to one another from a stop position against spring support. The pelvic or lumbar part at least partially takes on the function of an otherwise required back support. The subdivision of the back shell allows an exact adjustment to the respective sitting position of a person using the chair.
A further development of the invention provides that the seat support part of the support has a spring for resetting the seat, preferably a torsion spring, at the swivel joint at its front end. Such torsion suspension can be accommodated in a space-saving manner, so that this construction also contributes to a low overall height in the seating area.
It is particularly advantageous if one or more return springs supporting the seat return spring, preferably pressure springs engaging on the underside, are provided between the seat shell and the back shell or the lumbar part. The torsion springs and the return springs together ensure that the seat and the backrest come to an upper or front position when the seat mechanism is released and the seat is relieved. Due to the division into two spring groups, the respective springs can be made comparatively small, so that this in turn also contributes to a low overall height.

Zusätzliche Ausgetaltungen der Erfindung sind in den weiteren Unteransprüchen aufgeführt. Nachstehend ist die Erfindung mit ihren wesentlichen Einzelheiten anhand der Zeichnung noch näher erläutert.Additional refinements of the invention are listed in the further subclaims. The invention with its essential details is explained in more detail below with reference to the drawing.

Es zeigt:

Fig. 1
eine Seitenansicht eines erfindungsgemäßen Drehsessels,
Fig. 2
eine Seitenansicht eines Drehsessels ohne Verkleidung der Verstellmechanik,
Fig. 3
eine Ansicht der Sitzschale sowie der damit verschwenkbar verbundenen, zweiteilig ausgebildeten Rückenschale und
Fig. 4
eine Unterseitenansicht eines Stuhles mit Support und davon getragenen Schalen.
It shows:
Fig. 1
a side view of a swivel chair according to the invention,
Fig. 2
a side view of a swivel chair without covering the adjustment mechanism,
Fig. 3
a view of the seat shell and the pivotally connected, two-part back shell and
Fig. 4
a bottom view of a chair with support and shells carried by it.

Ein Stuhl 1 (Fig. 1) ist als Bürodrehstuhl ausgebildet und weist im wesentlichen einen Standfuß 2, einen an dessen Standrohr 3 befestigten Support 4, einen Sitz 5 sowie eine Rückenlehne 6 auf.
Der Sitz 5 und die Rückenlehne 6 sind mit einer insbesondere abnehmbaren Polsterung 7 versehen, unter der sich eine Sitzschale 8 bzw. eine Rückenschale 9 befinden, wie dies gut in Fig. 3 erkennbar ist.
Erfindungsgemäß ist nun vorgesehen, daß die Sitzschale und vorzugsweise auch die Rückenschale als unmittelbar mit dem Support 4 verbundene Trägerteile ausgebildet sind. Sie übernehmen somit auch die Funktion einer tragenden Unterkonstruktion, so daß eine solche bei dem erfindungsgemäßen Stuhl nicht erforderlich ist. Die Schalen sind zur Erzielung der erforderlichen Festigkeit gewölbt ausgebildet und weisen bei ihren Außenrandbereichen und auch im Bereich der Zwischenflächen, sickenartige Versteifungsanformungen 10 auf. Die Versteifungsanformungen sind vorzugsweise innenseitig, der Polsterung 7 zugewandt angeformt, so daß die Schalen außenseitig glatt ohne störende Vorsprünge ausgebildet sein können.A chair 1 (FIG. 1) is designed as an office swivel chair and essentially has a base 2, a support 4 fastened to its stand tube 3, a seat 5 and a backrest 6.
The seat 5 and the backrest 6 are provided with a removable padding 7, under which there is a seat shell 8 or a back shell 9, as can be clearly seen in FIG. 3.
According to the invention, it is now provided that the seat shell and preferably also the back shell are designed as carrier parts directly connected to the support 4. They therefore also take on the function of a supporting substructure, so that such is not necessary in the chair according to the invention. The shells are arched to achieve the required strength and have bead-like stiffening formations 10 in their outer edge areas and also in the area of the intermediate surfaces. The stiffening formations are preferably molded on the inside, facing the padding 7, so that the shells can be smooth on the outside without disruptive projections.

Die Sitzschale 8 und die Rückenschale 9 sind in ihrem Trennbereich 11 über Gelenke 12 miteinander verbunden. Dazu sind an den Schalen 8, 9 bei den zueinander weisenden Stirnenden Anformungen 13 zur Bildung von etwa flanschförmigen Gelenkteilen vorgesehen. Von der Seite her eingesetzte Steckbolzen 14 bilden die Gelenkachsen.
Fig. 2 und 4 lassen auch noch gut erkennen, daß die Schalen an ihren zueinander weisenden Stirnenden hohlkehlenartig ineinandergreifend ausgebildet sind, so daß sich praktisch kein Zwischenspalt im Trennbereich 11 ergibt.
Der Support 4 weist ein mit der Sitzschale über ein Schwenkgelenk 15 verbundenes Sitzträgerteil 16 auf, das andererseits mit dem Standrohr 3 verbunden ist. Weiterhin hat der Support ein insbesondere starr mit der Rückenschale 9 verbundenes R ückenträgerteil 18, welches an seinem der Rückenschale abgewandten Ende über eine Dreh-Schiebelagerung 17 mit dem anderen Supportteil 16 verbunden ist. In Fig. 2 und 4 ist angedeutet, daß diese Dreh-Schiebelagerung im wesentlichen einen Schiebeschlitz 19 in dem Sitzträgerteil 16 sowie einen diesen Schlitz durchgreifenden Querbolzen 20 in dem Rückenträgerteil 18 aufweist. Durch diese Anordnung wird in an sich bekannter Weise erreicht, daß bei einer Rückenlehnenverstellung gleichsinnig der Sitz mit dieser Bewegung etwas mitläuft. Die weitere Verstell- und Arretiermechanik ist in den Zeichnungen der Einfachheit halber nicht näher dargestellt.
Das Sitzträgerteil 16 des Supports 4 weist an seinem vorderen Ende bei dem Schwenkgelenk 15 zur Sitzrückstellung in eine obere Lage, eine Torsionsfederung 21 auf. Durch diese Torsionsfederung 21 erfolgt eine Verstellung des Sitzes 5 um das Schwenkgelenk 15 in Richtung des Pfeiles Pf 1 (Fig. 1), wenn die Verstellmechanik entriegelt ist. Durch die Verbindung des Rückenträgerteiles 18 über die Dreh-Schiebelagerung 17 erfolgt gleichzeitig auch ein Verschwenken der Rückenlehne 6 in Richtung des Pfeiles Pf 2.The seat shell 8 and the back shell 9 are connected to one another in their separating region 11 via joints 12. For this purpose, formations 13 are provided on the shells 8, 9 at the mutually facing end faces to form approximately flange-shaped joint parts. Insert pins 14 inserted from the side form the hinge axes.
FIGS. 2 and 4 also clearly show that the shells are designed to interlock with one another at their facing ends, so that there is practically no intermediate gap in the separating region 11.
The support 4 has a seat support part 16 which is connected to the seat shell via a swivel joint 15 and which on the other hand is connected to the standpipe 3. Furthermore, the support has a back support part 18, which is in particular rigidly connected to the back shell 9 and is connected to the other support part 16 at its end facing away from the back shell via a rotary / sliding bearing 17. 2 and 4 it is indicated that this rotary / sliding bearing essentially has a sliding slot 19 in the seat support part 16 and a cross bolt 20 extending through this slot in the back support part 18. This arrangement ensures, in a manner known per se, that the seat moves somewhat in the same direction with this movement when the backrest is adjusted. The further adjustment and locking mechanism is not shown in the drawings for the sake of simplicity.
The seat support part 16 of the support 4 has a torsion suspension 21 at its front end at the swivel joint 15 for returning the seat to an upper position. This torsion suspension 21 adjusts the seat 5 about the swivel joint 15 in the direction of arrow Pf 1 (FIG. 1) when the adjustment mechanism is unlocked. By connecting the back support part 18 via the rotary / sliding bearing 17, the backrest 6 is also pivoted in the direction of the arrow Pf 2.

Fig. 4 läßt gut erkennen, daß zwischen der Sitzschale 8 und der Rückenschale 9 die vorerwähnte Sitzrückstellbewegung unterstützende Rückstellfedern 22 vorgesehen sind. Diese sind unterseitig angebracht und als Druckfedern ausgebildet. Sie liegen innerhalb einer Supportverkleidung, die in Fig. 4 weggelassen ist.
Wie bereits vorerwähnt, wirken die Rückstellfedern 22 in gleiche Richtung wie die Torsionsfederung 21. Durch diese Aufteilung in mehrere Federgruppen können die einzelnen Federn sehr klein gehalten werden, so daß sie gut auch innerhalb einer flach ausgebildeten Träger- und Verstellmechanik unterbringbar sind.Fig. 4 clearly shows that between the seat shell 8 and the back shell 9, the above-mentioned seat return movement supporting return springs 22 are provided. These are attached on the underside and designed as compression springs. They lie within a support cladding, which is omitted in FIG. 4.
As already mentioned, the return springs 22 act in the same direction as the torsion spring 21. This division into several spring groups allows the individual springs to be kept very small, so that they can also be accommodated well within a flat support and adjustment mechanism.

Im Ausführungsbeispiel ist die Rückenlehne 6 zweiteilig mit einem Becken- oder Lumbalteil 23 sowie einem sich daran nach oben anschließenden Schulterteil 24 ausgebildet. Die Rückenschalenteile 23, 24 sind über einen bestimmten Bereich verschwenkbar miteinander verbunden. Durch eine Federabstützung mit Federn 25 (vgl. Fig. 2 und 3) wird das Schulterteil 24 gegen Anschläge 26 in einer vorderen Schwenkstellung gehalten. Beim Anlehnen an das Schulterteil 24 ist dieses dann gegen die Federabstützung etwas nach hinten verschwenkbar, so daß eine Anpassung an die jeweilige Sitzposition eines Benutzers möglich ist.
Die Rückenschalenteile 23 und 24 sind über an ihren Seitenrändern 27 befindliche Gelenke 28 miteinander verbunden. Für die Druckfedern 25, die rückseitig an der Rückenlehne 6 angeordnet sind, sind Anformungen vorgesehen, zwischen die die Federn 25 eingesetzt sind.
Bei den Gelenken 28 befinden sich auch noch Anschlußstellen zum Befestigen von in Fig. 1 erkennbaren Armlehnen 29, die bedarfsweise anbringbar sind.
In Fig. 3 ist auch gut erkennbar, daß das Becken- oder Lumbalteil 23 sich über die gesamte Breite des Sitzes erstreckt. Dadurch sowie durch die Versteifungsanformungen 10 und auch durch eine bombierte, d.h. nach hinten ausgewölbte Formung erhält man auch in diesem Bereich trotz geringer Dicke eine hohe Festigkeit, so daß auch die beim Anlehnen auftretenden Kräfte gut übertragen werden können.
Die Sitzschale 8 und die Rückenschale 9 mit dem Beckenteil 23 und dem Schulterteil 24 bestehen vorzugsweise aus glasmattenverstärktem, thermoplastischem Kunststoffmaterial, vorzugsweise aus armiertem Polypropylen. Dadurch sind die Schalen jeweils einstückig in einem Arbeitsgang herstellbar.In the exemplary embodiment, the backrest 6 is formed in two parts with a pelvic or lumbar part 23 and a shoulder part 24 adjoining it upwards. The back shell parts 23, 24 are pivotally connected to one another over a specific area. A spring support with springs 25 (see FIGS. 2 and 3) holds the shoulder part 24 against stops 26 in a forward pivoting position. When leaning against the shoulder part 24, this can then be pivoted somewhat backwards against the spring support, so that an adaptation to the respective sitting position of a user is possible.
The back shell parts 23 and 24 are connected to one another via joints 28 located on their side edges 27. For the compression springs 25, which are arranged on the back of the backrest 6, projections are provided, between which the springs 25 are inserted.
At the joints 28 there are also connection points for fastening armrests 29 which can be seen in FIG. 1 and which can be attached if necessary.
In Fig. 3 it can also be clearly seen that the pelvic or lumbar part 23 extends over the entire width of the seat. As a result, as well as through the stiffening formations 10 and a cambered, ie bulging outwards, high strength is obtained in this area, despite the small thickness, so that the forces occurring when leaning against can also be transmitted well.
The seat shell 8 and the back shell 9 with the pelvic part 23 and the shoulder part 24 preferably consist of glass mat-reinforced, thermoplastic material, preferably of reinforced polypropylene. As a result, the shells can be produced in one piece in one operation.

Insgesamt erhält man durch die Integration eines sonst vorgesehenen Stützrahmens in die Sitzschale 8 und auch in die Rückenschale 9 eine sehr geringe Bauhöhe bzw. Dicke sowohl im Bereich des Sitzes als auch der Lehne, so daß Sessel mit durchgehend schlanker Seitensilhouette möglich sind, ohne daß nachteilige Kompromisse hinsichtlich z.B. der Verstellmechanik und dergleichen eingegangen werden müssen. Gleichzeitig sind auch die Konstruktion und die Montage erheblich vereinfacht.Overall, by integrating an otherwise provided support frame in the seat shell 8 and also in the back shell 9, a very small overall height or thickness is obtained both in the area of the seat and the backrest, so that armchairs with a continuously slender side silhouette are possible without disadvantageous Compromises regarding e.g. the adjustment mechanism and the like must be dealt with. At the same time, the construction and assembly are considerably simplified.

Claims (9)

  1. A chair, particularly an office swivel chair with an adjustable seat and a backrest connected thereto, the seat and backrest having an upholstered seat shell and back shell, as well as a foot having an upright tube or a support, characterized in that the seat shell (8) and back shell (9) are interconnected by way of a joint (12) having in the parting area joint portions which directly engage the shells (8, 9) and are composed by integral formations (13) on the shells (8, 9) at the front ends thereof facing one another, and that the seat shell (8) and back shell (9) take the form of self-supporting carrier parts directly connected to the support (4).
  2. A chair as claimed in claim 1, characterized in that the support (4) connected to the upright tube (3) or the like has a seat carrier element (16) connected to the seat shell (8) by way of a swivel joint (15) and a back carrier element (18) which is connected, in particular rigidly, to the back shell (9) or the like and to the seat carrier element by way of a rotary-sliding bearing (17).
  3. A chair as claimed in claim 1 or claim 2, characterized in that the shells (8,9) at the front ends thereof facing one another are designed in the manner of interlocking fillets, at least in areas.
  4. A chair as claimed in any one of claims 1 to 3, characterized in that the shells (8, 9) have at least in their outer edge areas, preferably also in the region of the interfaces, integral formations (10) which are bead-like and serve for stiffening and that the latter are formed particularly onto the inside, facing the upholstery.
  5. A chair as claimed in any one of claims 1 to 4, characterized in that the backrest is two-piece with self-supporting back shell pieces interconnected by way of joints (28) which are situated particularly at the side edges of said back shell pieces and have preferably formed-on joint portions, that at said joints swing stops (26) are provided to limit a forward swing movement of the shoulder piece and that at the rear one or a plurality of pressure or compression springs (25) acting in the direction of stop are provided.
  6. A chair as claimed in claim 5, characterized in that at the joints (28) between the two back shell pieces (23, 24) points of attachment for fitting arm-rests (29) are provided.
  7. A chair as claimed in any one of claims 1 to 6, characterized in that at the front end of the seat carrier element (16) of the support (4) said seat carrier element has at the swivel joint (15) a spring system for resetting the seat, preferably a torsion spring system (21).
  8. A chair as claimed in any one of claims 1 to 7, characterized in that between the seat shell (8) and back shell (9) or lumbar portion (23) provision is made for one or a plurality of restoring springs (22) assisting the spring system (21) resetting the seat, preferably pressure or compression springs acting at the underside.
  9. A chair as claimed in any one of claims 1 to 8, characterized in that the seat shell (8) and back shell (9) consist of glass-mat reinforced, thermoplastic plastic material, preferably polypropylene.
EP87111319A 1986-09-08 1987-08-05 Chair Expired - Lifetime EP0259609B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT87111319T ATE70956T1 (en) 1986-09-08 1987-08-05 CHAIR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3630503 1986-09-08
DE19863630503 DE3630503A1 (en) 1986-09-08 1986-09-08 CHAIR

Publications (3)

Publication Number Publication Date
EP0259609A2 EP0259609A2 (en) 1988-03-16
EP0259609A3 EP0259609A3 (en) 1988-06-22
EP0259609B1 true EP0259609B1 (en) 1992-01-02

Family

ID=6309124

Family Applications (1)

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EP87111319A Expired - Lifetime EP0259609B1 (en) 1986-09-08 1987-08-05 Chair

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US (1) US4834453A (en)
EP (1) EP0259609B1 (en)
AT (1) ATE70956T1 (en)
DE (2) DE3630503A1 (en)

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Also Published As

Publication number Publication date
DE3630503C2 (en) 1991-05-08
EP0259609A3 (en) 1988-06-22
ATE70956T1 (en) 1992-01-15
DE3630503A1 (en) 1988-03-10
DE3775664D1 (en) 1992-02-13
EP0259609A2 (en) 1988-03-16
US4834453A (en) 1989-05-30

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