EP0242433B1 - Chair having a resiliently tiltable seat and back-rest - Google Patents

Chair having a resiliently tiltable seat and back-rest Download PDF

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Publication number
EP0242433B1
EP0242433B1 EP86113762A EP86113762A EP0242433B1 EP 0242433 B1 EP0242433 B1 EP 0242433B1 EP 86113762 A EP86113762 A EP 86113762A EP 86113762 A EP86113762 A EP 86113762A EP 0242433 B1 EP0242433 B1 EP 0242433B1
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EP
European Patent Office
Prior art keywords
seat
chair
shell
slots
longitudinal slots
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
EP86113762A
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German (de)
French (fr)
Other versions
EP0242433A2 (en
EP0242433A3 (en
Inventor
Willi Hensel
Jürgen Prof. Lange
Reinhard Paulus
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Mauser Waldeck AG
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Mauser Waldeck AG
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Publication date
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Priority to AT86113762T priority Critical patent/ATE60201T1/en
Publication of EP0242433A2 publication Critical patent/EP0242433A2/en
Publication of EP0242433A3 publication Critical patent/EP0242433A3/en
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Publication of EP0242433B1 publication Critical patent/EP0242433B1/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
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/441—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with adjustable elasticity
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/02—Rocking chairs
    • A47C3/021—Rocking chairs having elastic frames
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/02—Rocking chairs
    • A47C3/025—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/12—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats with shell-shape seat and back-rest unit, e.g. having arm rests
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • A47C7/44—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame
    • A47C7/445—Support for the head or the back for the back with elastically-mounted back-rest or backrest-seat unit in the base frame with bar or leaf springs

Definitions

  • the invention relates to a chair in which the seat and back are simultaneously formed as the supporting structure for this one-piece shell and are provided in the region of the bend of the rear end of the seat to the back of transverse slots starting in the seat direction longitudinal slots in the seat, and that the shell is either arranged to pivot about the front edge of the seat, or the seat of the shell is firmly attached to the chair frame.
  • the rear part of the seat tends to spring downwards so that the front end of the seat rises and thereby presses against the undersides of the thighs of a person sitting on the chair (FIG. 4 of US Pat. No. 4,529,247), which can only be compensated for in part if the seat and back shells are all similar to a support arm about a transverse axis at the front end of the seat is resiliently pivotally attached to the chair frame (claim 16 of US Pat. No. 4,529,247).
  • the object of the invention is to provide a solution which enables equally good elastic resilience between the seat and back of the one-piece shell, as in the known chairs described above, without the disadvantages described above in the transition area between seat and back through the transverse slot of an overall U-shaped slot to have to put up with.
  • transverse slots as waist-like recesses running from the outside inwards to the longitudinal slots or as simple Cross slots are formed so that the area of the shell located between the longitudinal slots running in the direction of the seat continues from the seat into the back.
  • the size of the seat angle opening that can be achieved essentially depends on the length of the longitudinal slots extending in the seat direction.
  • the one-piece shell can either be arranged so as to be resiliently pivotable about the front edge of the seat, or the seat of the shell can be firmly attached to the chair frame, in the latter case practically the entire seat area being available for attachment to the chair frame.
  • a structurally particularly simple design is obtained when the resilient clamping of the one-piece shell on the chair frame by supporting and fastening the front end of the seat on a tra fixed to the chair frame verse is formed such that the entire one-piece shell is resiliently pivotable about the rear edge of the cross member as a transverse axis.
  • the crossmember can be formed by an essentially horizontally arranged plate, so that there is a correspondingly wide contact surface of the shell on the crossmember.
  • the upper rear edge of the plate be rounded, so that there is no indentation in the area of the shell opposite the upper rear edge when the shell is pivoted resiliently about this rear edge, which acts as a pivot axis
  • the rear chair legs which are only slightly downwardly inclined from the crossbeam, branched beneath the seat of the one-piece shell and oriented essentially vertically at the end of the seat.
  • the relevant rear chair legs can be connected to the crossmember in a structurally particularly simple manner and nevertheless do not prevent the one-piece shell from pivoting downward in the region of the seat.
  • the chair frame can also be designed in any other way, for example as a cantilever chair or as a telescopic bogie.
  • the chair according to FIGS. 1 and 2 has two front chair legs 1 formed from tubular profiles, which are connected to one another by a plate-shaped cross member 2. On the traverse 2 are two lower chair legs 3 via a connecting bridge 4 connected to the cross member 2, preferably by welding.
  • the rear lower chair legs 3 initially slope slightly downward from the cross member 2 and are directed essentially downwards at the rear end of the chair.
  • a one-piece, seat 5 and back 6 forming shell 7 made of suitable resilient material such as plywood, plastic or metal is firmly clamped by means of fastening screws or rivets 8, such that the shell 7 as a whole is resiliently pivotable, the part of the seat 5 lying in front of the traverse 2 essentially retains its position.
  • the rear upper edge of the cross member 2 is expediently rounded, so that when the region of the shell 7 lying behind the cross member 2 is pivoted, no notch is produced in the region opposite the rear upper edge of the cross member 2.
  • a waist-like indentation 9 is formed and from the inner end of this indentation 9 incisions or longitudinal slots 10 in the seat 5 of the shell 7, which run forward in the direction of the seat, such that when the back 6 is loaded by itself opposing person the back 6 can pivot about a horizontal axis relative to the seat 5, which extends through the front ends of the longitudinal slots 10.
  • a fork-shaped fastening element 16 is arranged, which is provided with two forwardly extending prongs 17, which are connected to a plate-shaped cross member 18, preferably welded to this cross member 18 in the same manner as in the embodiment according to 1 and 2, the one described there in detail, one-piece seat 5 and back 6 forming shell 7 attached, which is referred to to avoid repetition in full.
  • the suspension behavior is then the same in the previously described chair according to FIGS. 1 and 2.
  • the chair is designed with a so-called cantilever chair frame 23, ie a resilient tubular frame which rests on the floor with a U-shaped base 24, with the legs of the U-shaped base 24 continue in substantially vertical front chair legs 25.
  • the upward-pointing tubes of the front chair legs are then bent twice essentially at right angles to form the supporting structure for a seat and back.
  • the upward tube parts of the front chair legs 25 are only extended by a short piece 26 at the upper end after turning into the horizontal and a cross member 27 is fastened between the tube pieces 26, preferably by welding.
  • the one-piece seat 5 and back 6 forming shell 7, which is described in detail there, is fastened, to which reference is made in its entirety to avoid repetitions.
  • a cantilever chair frame can be provided in this way with a shell-shaped seat and back construction, as is often desired and thereby the particularly advantageous reinforcement of the resilient adjustability between seat 5 and back 6 can be achieved, as is the case with the Embodiment according to FIGS. 1 and 2 is described in detail. It is only to be accepted that, due to the cantilever chair frame, the front end of the seat 5 can shift on a circular path depending on the changing load as a result of a different seating position of the person using the chair, the center of which is approximately at the lower end of the chair legs 25 lies. In cases where the chair in question is not directly associated with other furniture, such as desks or the like, this generally does not matter.

Landscapes

  • Chairs Characterized By Structure (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Abstract

Chair having seat and back parts capable of springy tilting relative to each other. The seat and back parts are provided in the region where they join each other with a reduced width to intensify the relative tilting thereof. Longitudinal slots are also provided in the seat and extend from the region of reduced width to further intensify this relative tilting. The chair frame is provided with fastening elements in the region of the front edge of the seat for tilting attachment of seat and back.

Description

Die Erfindung betrifft einen Stuhl, bei dem Sitz und Rücken als gleichzeitig die Tragkonstruktion für diese bil­dende einteilige Schale ausgebildet sind und im Bereich der Umbiegung des hinteren Endes des Sitzes zum Rücken von Querschlitzen ausgehend nach vorn in Sitzrichtung verlau­fende Längsschlitze im Sitz vorgesehen sind, und daß die Schale entweder um die Vorderkante des Sitzes federnd schwenkbar angeordnet oder der Sitz der Schale fest am Stuhlgestell befestigt ist.The invention relates to a chair in which the seat and back are simultaneously formed as the supporting structure for this one-piece shell and are provided in the region of the bend of the rear end of the seat to the back of transverse slots starting in the seat direction longitudinal slots in the seat, and that the shell is either arranged to pivot about the front edge of the seat, or the seat of the shell is firmly attached to the chair frame.

Bei bekannten Stühlen dieser Art (US-PS 4 529 247 und DE-GM 75 00 152) sind die in Sitzrichtung verlaufenden Längsschlitze im Sitz durch einen Querschlitz miteinander verbunden, derart, daß sich ein insgesamt U-förmiger Schlitz im wesentlichen im Sitzbereich der einteiligen Schale ergibt. Dadurch wird eine Verstärkung der federnden Verschwenkbarkeit des Rückens um eine durch die vorderen Endpunkte der in Sitzrichtung verlaufenden Längsschlitze sich erstreckende horizontale Achse bewirkt Da der die Basis des U bildende Querschlitz sich jedoch über die ge­samte Sitzbreite erstreckt, muß der betreffende Schlitz durch eine elastische Auflage abgedeckt werden, wenn ver­hindert werden soll, daß Quetschungen des Gesässes der auf dem Stuhl sitzenden Personen vorkonmmen können. Für eine Schale ohne zusätzliche Polsterung oder dgl. ist eine der­artige Schlitzausgestaltung daher nicht verwendbar. Hinzu kommt, daß dann, wenn der Sitz der Schale am Stuhlgestell mittels der beidseitigen schmalen Streifen zwischen den sich in Sitzrichtung erstreckenden Längsschlitzen und den Sitzrändern befestigt wird, bei einem Abwärtsfedern des hinteren Teils des Sitzes sich die Tendenz ergibt, daß das vordere Ende des Sitzes sich anhebt und dabei gegen die Un­terseiten der Oberschenkel einer auf dem Stuhl sitzenden Person drückt (Fig 4 von US-PS 4 529 247), was nur teil­weise kompensierbar ist, wenn die Sitz- und Rückenschale insgesamt um eine Querachse am vorderen Ende des Sitzes tragarmähnlich federnd verschwenkbar am Stuhlgestell befe­stigt ist (Anspruch 16 von US-PS 4 529 247).In known chairs of this type (US Pat. No. 4,529,247 and DE-GM 75 00 152), the longitudinal slots running in the seat direction are connected to one another by a transverse slot in such a way that an overall U-shaped slot is essentially in the seat area of the one-piece Shell results. This increases the resilient pivotability of the back about a horizontal axis extending through the front end points of the longitudinal slots running in the direction of the seat.But since the transverse slot forming the base of the U extends over the entire seat width, the slot in question must be covered by an elastic pad be used to prevent bruises in the buttocks of people sitting on the chair. For one Such a slot design cannot therefore be used for a shell without additional padding or the like. In addition, if the seat of the shell is attached to the chair frame by means of the narrow strips on both sides between the longitudinal slots extending in the direction of the seat and the seat edges, the rear part of the seat tends to spring downwards so that the front end of the seat rises and thereby presses against the undersides of the thighs of a person sitting on the chair (FIG. 4 of US Pat. No. 4,529,247), which can only be compensated for in part if the seat and back shells are all similar to a support arm about a transverse axis at the front end of the seat is resiliently pivotally attached to the chair frame (claim 16 of US Pat. No. 4,529,247).

Aufgabe der Erfindung ist die Schaffung einer Lösung, wel­che ein gleichgutes elastisches Federungsvermögen zwischen Sitz und Rücken der einteiligen Schale ermöglicht, wie bei den vorbeschriebenen bekannten Stühlen, ohne dabei die vor­beschriebenen Nachteile im Übergangsbereich zwischen Sitz und Rücken durch den Querschlitz eines insgesamt U-förmi­gen Schlitzes in Kauf nehmen zu müssen.The object of the invention is to provide a solution which enables equally good elastic resilience between the seat and back of the one-piece shell, as in the known chairs described above, without the disadvantages described above in the transition area between seat and back through the transverse slot of an overall U-shaped slot to have to put up with.

Bei einem Stuhl der eingangs bezeichneten Art wird diese Aufgabe gemäß der Erfindung dadurch gelöst, daß die Quer­schlitze als von außen nach innen zu den Längsschlitzen verlaufende taillenähnliche Einziehungen oder als einfache Querschlitze ausgebildet sind, so daß der zwischen den in Sitzrichtung verlaufenden Längsschlitzen befindliche Be­reich der Schale sich vom Sitz durchgehend in den Rücken fortsetzt.In a chair of the type described in the introduction, this object is achieved according to the invention in that the transverse slots as waist-like recesses running from the outside inwards to the longitudinal slots or as simple Cross slots are formed so that the area of the shell located between the longitudinal slots running in the direction of the seat continues from the seat into the back.

Aufgrund dieser Ausbildung ist im zentrischen Übergangsbe­reich zwischen Sitz und Rücken keinerlei Behinderung mehr für die auf dem Stuhl sitzende Person gegeben, dennoch aber ein gleichgutes Federungsvermögen zwischen Sitz und Rücken mit entsprechender Vergrößerung der Sitzwinkelöff­nung gewährleistet, wie bei den bekannten Stühlen mit U-förmiger Schlitzausbildung, was für ein bequemes Nachhin­tenlehnen und dabei stattfindendes sicheres Abstützen sehr wünschenswert ist, wobei das Maß der erzielbaren Sitzwin­kelöffnung im wesentlichen von der Länge der sich in Sitz­richtung erstreckenden Längsschlitze abhängig ist. Auch ist erkennbar, daß die einteilige Schale wahlweise entwe­der um die Vorderkante des Sitzes federnd schwenkbar ange­ordnet oder der Sitz der Schale fest am Stuhlgestell befe­stigt werden kann, wobei im letzteren Fall praktisch der gesamte Sitzflächenbereich zur Befestigung mit dem Stuhlge­stell zur Verfügung steht.Because of this design, there is no longer any handicap for the person sitting on the chair in the central transition area between the seat and back, but nevertheless an equally good elasticity between the seat and back is ensured with a corresponding enlargement of the seat angle opening, as in the known chairs with a U-shaped slot design, which is very desirable for a comfortable backward leaning and safe support taking place, the size of the seat angle opening that can be achieved essentially depends on the length of the longitudinal slots extending in the seat direction. It can also be seen that the one-piece shell can either be arranged so as to be resiliently pivotable about the front edge of the seat, or the seat of the shell can be firmly attached to the chair frame, in the latter case practically the entire seat area being available for attachment to the chair frame.

Eine konstruktiv besonders einfache Ausgestaltung erhält man, wenn die federnde Einspannung der einteiligen Schale am Stuhlgestell durch Auflage und Befestigung des vorderen Endes des Sitzes auf einer am Stuhlgestell befestigten Tra­ verse gebildet ist, derart, daß die gesamte einteilige Schale um den hinteren Rand der Traverse als Querachse fe­dernd verschwenkbar ist.A structurally particularly simple design is obtained when the resilient clamping of the one-piece shell on the chair frame by supporting and fastening the front end of the seat on a tra fixed to the chair frame verse is formed such that the entire one-piece shell is resiliently pivotable about the rear edge of the cross member as a transverse axis.

Die Traverse kann dabei von einer im wesentlichen horizon­tal angeordneten Platte gebildet sein, so daß sich eine entsprechend breite Auflagefläche der Schale auf der Traverse ergibt.The crossmember can be formed by an essentially horizontally arranged plate, so that there is a correspondingly wide contact surface of the shell on the crossmember.

Dabei empfiehlt es sich dann, die obere Hinterkante der Platte abgerundet auszubilden, so daß sich bei der federn­den Verschwenkbewegung der Schale um diese als Schwenkach­se wirkende Hinterkante keine Einkerburg in dem der oberen Hinterkante gegenüberliegenden Bereich der Schale ergibtIt is then recommended that the upper rear edge of the plate be rounded, so that there is no indentation in the area of the shell opposite the upper rear edge when the shell is pivoted resiliently about this rear edge, which acts as a pivot axis

Bei einem Stuhl mit normalen vier Standbeinen empfiehlt es sich, unterhalb des Sitzes der einteiligen Schale im Be­reich derselben von der Traverse nur schwach abwärts ge­neigt verlaufende hintere Stuhlbeine abzweigen zu lassen, die am Ende des Sitzes im wesentlichen senkrecht gerichtet sind. Dadurch können die betreffenden hinteren Stuhlbeine in konstruktiv besonders einfacher Weise mit der Traverse verbunden sein und verhindern dennoch nicht eine Abwärts­verschwenkung der einteiligen Schale im Bereich des Sit­zes.In the case of a chair with normal four legs, it is advisable to have the rear chair legs, which are only slightly downwardly inclined from the crossbeam, branched beneath the seat of the one-piece shell and oriented essentially vertically at the end of the seat. As a result, the relevant rear chair legs can be connected to the crossmember in a structurally particularly simple manner and nevertheless do not prevent the one-piece shell from pivoting downward in the region of the seat.

Das Stuhlgestell kann aber auch in beliebiger anderer Wei­se ausgebildet sein, beispielsweise als Freischwinger oder als Teleskopdrehgestell.The chair frame can also be designed in any other way, for example as a cantilever chair or as a telescopic bogie.

Die Erfindung ist nachstehend anhand der Zeichnung bei­spielsweise näher erläutert Diese zeigt in

  • Fig. 1 eine besonders vorteilhafte Ausgestaltung eines Stuhles mit Sitz und Rücken bildender einteiliger Schale in Seitenansicht,
  • Fig. 2 den Stuhl gemäß Fig. 1 in Draufsicht,
  • Fig. 3 einen Drehstuhl mit Sitz- und Rückenschale in Seitenansicht,
  • Fig. 4 den Stuhl gemäß Fig 3 in Draufsicht,
  • Fig. 5 einen Stuhl mit Sitz- und Rückenschale mit frei­schwingendem Stuhlgestell in Seitenansicht und in
  • Fig. 6 den Stuhl gemäß Fig. 5 in Draufsicht.
The invention is explained in more detail below with reference to the drawing, for example
  • 1 is a particularly advantageous embodiment of a chair with seat and back-forming one-piece shell in side view,
  • 2 the chair according to FIG. 1 in plan view,
  • 3 is a side view of a swivel chair with seat and back shell,
  • 4 is a top view of the chair according to FIG. 3,
  • Fig. 5 shows a chair with seat and back shell with free-swinging chair frame in side view and in
  • Fig. 6 the chair of FIG. 5 in plan view.

Der Stuhl gemäß Fig 1 und 2 weist zwei aus Rohrprofilen gebildete vordere Stuhlbeine 1 auf, die durch eine platten­förmige Traverse 2 miteinander verbunden sind. An der Tra­verse 2 sind zwei untere Stuhlbeine 3 über einen Verbindungssteg 4 mit der Traverse 2 verbunden, und zwar vorzugs­weise durch Verschweißung. Die hinteren unteren Stuhlbeine 3 verlaufen von der Traverse 2 zunächst schwach abwärts geneigt und sind am hinteren Ende des Stuhls im wesentli­chen abwärts gerichtet.The chair according to FIGS. 1 and 2 has two front chair legs 1 formed from tubular profiles, which are connected to one another by a plate-shaped cross member 2. On the traverse 2 are two lower chair legs 3 via a connecting bridge 4 connected to the cross member 2, preferably by welding. The rear lower chair legs 3 initially slope slightly downward from the cross member 2 and are directed essentially downwards at the rear end of the chair.

An der Traverse 2 ist eine einteilige, Sitz 5 und Rücken 6 bildende Schale 7 aus geeignetem federnden Material wie Sperrholz, Kunststoff oder Metall mittels Befestigungs­schrauben oder Nieten 8 fest eingespannt befestigt, der­art, daß die Schale 7 als Ganzes federnd nachgiebig ver­schwenkbar ist, wobei der vor der Traverse 2 liegende Teil des Sitzes 5 seine Lage im wesentlichen beibehält. Die hin­tere obere Kante der Traverse 2 ist zweckmäßig abgerundet ausgebildet, um bei der Verschwenkung des hinter der Tra­verse 2 liegenden Bereichs der Schale 7 keine Einkerbung im der hinteren oberen Kante der Traverse 2 gegenüberlie­genden Bereich hervorzurufen.On the cross member 2, a one-piece, seat 5 and back 6 forming shell 7 made of suitable resilient material such as plywood, plastic or metal is firmly clamped by means of fastening screws or rivets 8, such that the shell 7 as a whole is resiliently pivotable, the part of the seat 5 lying in front of the traverse 2 essentially retains its position. The rear upper edge of the cross member 2 is expediently rounded, so that when the region of the shell 7 lying behind the cross member 2 is pivoted, no notch is produced in the region opposite the rear upper edge of the cross member 2.

Zwischen Sitz 5 und Rücken 6 der Schale 7 ist eine taillen­ähnliche Einziehung 9 ausgebildet und vom inneren Ende die­ser Einziehung 9 an nach vorn in Sitzrichtung verlaufende Einschnitte bzw. Längsschlitze 10 im Sitz 5 der Schale 7 derart, daß bei Belastung des Rückens 6 durch eine sich gegenlehnende Person der Rücken 6 um eine horinzontale Achse gegenüber dem Sitz 5 verschwenken kann, die sich durch die vorderen Enden der Längsschlitze 10 erstreckt.Between the seat 5 and the back 6 of the shell 7, a waist-like indentation 9 is formed and from the inner end of this indentation 9 incisions or longitudinal slots 10 in the seat 5 of the shell 7, which run forward in the direction of the seat, such that when the back 6 is loaded by itself opposing person the back 6 can pivot about a horizontal axis relative to the seat 5, which extends through the front ends of the longitudinal slots 10.

Aufgrung dieser Ausbildung ist erkennbar, daß sich eine zweifache Verstärkung der ohnehin gegebenen federnden Ver­stellbarkeit zwischen Sitz 5 und Rücken 6 der Schale 7 er­gibt, und zwar einmal durch die taillenartige Einziehung 9, insbesondere aber auch noch durch die in Sitzrichtung verlaufenden Längsschlitze 10 zwischen Sitz 5 und Rücken 6, so daß sich bei entsprechender Belastung des Rückens 6 bei einem Nachhintenlehnen der den Stuhl benutzenden Per­son eine besonders starke Vergrößerung der Sitzwinkelöff­nung, d.h. des Winkels zwischen Sitz 5 und Rücken 6 er­gibt, wie dies aus ergonomischen Gründen sehr erwünscht ist. Wie Fig. 1 zeigt, wird das Abwärtsfedern der Schale 7 beim Benutzen des Stuhles durch die hinteren Stuhlbeine nicht behindert, weil diese trotz raumsparender Ausbildung unterhalb des Sitzes 5 entsprechend leicht abwärts geneigt verlaufen.Due to this design, it can be seen that there is a double reinforcement of the resilient adjustability between seat 5 and back 6 of the shell 7, in particular by the waist-like retraction 9, but in particular also by the longitudinal slots 10 between seat 5 which extend in the direction of the seat and back 6, so that with a corresponding load on the back 6 when the person using the chair leans back, a particularly large enlargement of the seat angle opening, ie the angle between seat 5 and back 6 results, as is very desirable for ergonomic reasons. As shown in FIG. 1, the downward springing of the shell 7 is not hindered by the rear chair legs when the chair is used, because, despite the space-saving design, they run correspondingly slightly downward beneath the seat 5.

Der Stuhl gemäß den Fig. 3 und 4 weist ein übliches höhen­verstellbares Drehgestell 13 auf, das mittels Laufrollen 14 verfahrbar ist. Am oberen Ende eines drehbaren Teleskop­teils 15 ist ein gabelförmiges Befestigungselement 16 ange­ordnet, das mit zwei sich nach vorn erstreckenden Zinken 17 versehen ist, die mit einer plattenförmigen Traverse 18 verbunden, vorzugsweise verschweißt sind Mit dieser Tra­verse 18 ist in gleicher Weise wie bei der Ausführungsform nach den Fig 1 und 2 die dort im einzelnen beschriebene, einteilige Sitz 5 und Rücken 6 bildende Schale 7 befestigt, worauf zur Vermeidung von Wiederholungen in vollem Unfang Bezug genommen wird. Das Federungsverhalten ist dann das gleiche beim zuvor bescriebenen Stuhl gemäß Fig. 1 und 2.3 and 4 has a conventional height-adjustable bogie 13 which can be moved by means of rollers 14. At the upper end of a rotatable telescopic part 15, a fork-shaped fastening element 16 is arranged, which is provided with two forwardly extending prongs 17, which are connected to a plate-shaped cross member 18, preferably welded to this cross member 18 in the same manner as in the embodiment according to 1 and 2, the one described there in detail, one-piece seat 5 and back 6 forming shell 7 attached, which is referred to to avoid repetition in full. The suspension behavior is then the same in the previously described chair according to FIGS. 1 and 2.

Bei dem Stuhl nach den Fig. 5 und 6 ist der Stuhl mit einem sog. Freischwinger-Stuhlgestell 23 ausgebildet, d.h. einem federnden Rohrrahmen, der mit einer U-förmigen Basis 24 auf dem Boden aufliegt, wobei sich die Schenkel der U-förmigen Basis 24 in im wesentlichen senkrecht gerichtete vordere Stuhlbeine 25 fortsetzen. Bei einem klassischen Freischwinger-Stuhl sind die aufwärtsgerichteten Rohre der vorderen Stuhlbeine dann weiter zweifach im wesentlichen rechtwinklig umgebogen, um derart die Tragkonstruktion für einen Sitz und Rücken zu bilden. Bei dem Stuhl nach Fig. 5 und 6 sind die aufwärtsgerichteten Rohrteile der vorderen Stuhlbeine 25 jedoch am oberen Ende nach Umbeigung in die Horizontale nur noch um ein kurzes Stück 26 verlängert und zwischen den Rohrstücken 26 ist eine Traverse 27, vorzugsweise durch Anschweißung befestigt. An der Traverse 27 ist in gleicher Weise wie bei der Ausführungsform nach den Fig. 1 und 2 die dort im einzelnen beschriebene, einteilige Sitz 5 und Rücken 6 bildende Schale 7 befestigt, worauf zur Vermeidung von Wiederholungen in vollem Umfang Bezug genommen wird.5 and 6, the chair is designed with a so-called cantilever chair frame 23, ie a resilient tubular frame which rests on the floor with a U-shaped base 24, with the legs of the U-shaped base 24 continue in substantially vertical front chair legs 25. In the case of a classic cantilever chair, the upward-pointing tubes of the front chair legs are then bent twice essentially at right angles to form the supporting structure for a seat and back. 5 and 6, the upward tube parts of the front chair legs 25, however, are only extended by a short piece 26 at the upper end after turning into the horizontal and a cross member 27 is fastened between the tube pieces 26, preferably by welding. On the traverse 27, in the same way as in the embodiment according to FIGS. 1 and 2, the one-piece seat 5 and back 6 forming shell 7, which is described in detail there, is fastened, to which reference is made in its entirety to avoid repetitions.

Wie erkennbar ist, kann auf diese Weise ein Freischwinger-­Stuhlgestell mit einer schalenförmigen Sitz- und Rückenkon­struktion versehen werden, wie dies vielfach gewünscht ist und dabei auch die besonders vorteilhafte Verstärkung der federnden Verstellbarkeit zwischen Sitz 5 und Rücken 6 er­reicht werden, wie diese bei der Ausführungsform gemäß den Fig. 1 und 2 ausführlich beschrieben ist. Dabei ist ledig­lich in Kauf zu nehmen, daß aufgrund des Freischwinger-­Stuhlgestells sich das vordere Ende des Sitzes 5 in Abhän­gigkeit von sich verändernder Belastung infolge anderer Sitzposition der den Stuhl benutzenden Person auf einer Kreisbahn verlagern kann, deren Mittelpunkt etwa am unte­ren Ende der Stuhlbeine 25 liegt. In Fällen, bei denen der betreffende Stuhl jedoch keinen anderen Möbeln, wie Schreibtischen o. dgl. unmittelbar zugeordnet ist, spielt dies im allgemeinen keine Rolle.As can be seen, a cantilever chair frame can be provided in this way with a shell-shaped seat and back construction, as is often desired and thereby the particularly advantageous reinforcement of the resilient adjustability between seat 5 and back 6 can be achieved, as is the case with the Embodiment according to FIGS. 1 and 2 is described in detail. It is only to be accepted that, due to the cantilever chair frame, the front end of the seat 5 can shift on a circular path depending on the changing load as a result of a different seating position of the person using the chair, the center of which is approximately at the lower end of the chair legs 25 lies. In cases where the chair in question is not directly associated with other furniture, such as desks or the like, this generally does not matter.

Claims (4)

1. Chair, in which the seat and back are formed as a single shell simultaneously forming the chair support structure, and in which longitudinal slots are provided in the seat in the region of the bend of the rear end of the seat to the back, these slots starting from transverse slots and extending forwards in the sitting direction, the shell either being resiliently pivotably mounted about the front edge of the seat or the seat of the shell being firmly fixed to the chair frame, characterised in that the transverse slots are formed as waist-like tapers extending inwards to the longitudinal slots (10) or as simple transverse slots, so that the region of the shell (7) located between the longitudinal slots (10) extending in the sitting direction continues from the seat (5) continuously into the back (6).
2. Chair according to claim 1, characterised in that the resilient mounting of the one-piece shell (7) on the chair frame is formed by placing and fixing the front end of the seat (5) on a cross-bar (2) fixed to the chair frame.
3. Chair according to claim 2, characterised in that the cross-bar (2) is formed by a plate mounted substantially horizontally.
4. Chair according to claim 3, characterised in that the upper rear edge of the plate is rounded.
EP86113762A 1986-04-21 1986-10-04 Chair having a resiliently tiltable seat and back-rest Expired - Lifetime EP0242433B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86113762T ATE60201T1 (en) 1986-04-21 1986-10-04 CHAIR WITH RESISTANT, ADJUSTABLE SEAT AND BACK.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19863613381 DE3613381A1 (en) 1986-04-21 1986-04-21 CHAIR WITH SPRING PIVOTING SEAT AND BACK
DE3613381 1986-04-21

Publications (3)

Publication Number Publication Date
EP0242433A2 EP0242433A2 (en) 1987-10-28
EP0242433A3 EP0242433A3 (en) 1988-05-04
EP0242433B1 true EP0242433B1 (en) 1991-01-23

Family

ID=6299137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86113762A Expired - Lifetime EP0242433B1 (en) 1986-04-21 1986-10-04 Chair having a resiliently tiltable seat and back-rest

Country Status (6)

Country Link
US (1) US4790595A (en)
EP (1) EP0242433B1 (en)
AT (1) ATE60201T1 (en)
DE (3) DE3613381A1 (en)
ES (1) ES2020914B3 (en)
GR (1) GR3001682T3 (en)

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Also Published As

Publication number Publication date
GR3001682T3 (en) 1992-11-23
DE3613381A1 (en) 1987-10-22
US4790595A (en) 1988-12-13
ATE60201T1 (en) 1991-02-15
DE3677205D1 (en) 1991-02-28
ES2020914B3 (en) 1991-10-16
EP0242433A2 (en) 1987-10-28
EP0242433A3 (en) 1988-05-04
DE8610855U1 (en) 1988-11-24
DE3613381C2 (en) 1988-02-25

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