EP0700651A1 - Improved structure for office chairs - Google Patents

Improved structure for office chairs Download PDF

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Publication number
EP0700651A1
EP0700651A1 EP94112645A EP94112645A EP0700651A1 EP 0700651 A1 EP0700651 A1 EP 0700651A1 EP 94112645 A EP94112645 A EP 94112645A EP 94112645 A EP94112645 A EP 94112645A EP 0700651 A1 EP0700651 A1 EP 0700651A1
Authority
EP
European Patent Office
Prior art keywords
seat
tilting
horizontal
backrest
movable
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
EP94112645A
Other languages
German (de)
French (fr)
Other versions
EP0700651B1 (en
Inventor
Michel Lamart
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.)
Steelcase Strafor SA
Original Assignee
Steelcase Strafor SA
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.)
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Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=41066324&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0700651(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Steelcase Strafor SA filed Critical Steelcase Strafor SA
Priority to AT94112645T priority Critical patent/ATE135541T1/en
Priority to ES94112645T priority patent/ES2085178T3/en
Priority to EP94112645A priority patent/EP0700651B1/en
Priority to DK94112645.0T priority patent/DK0700651T3/en
Priority to DE69400112T priority patent/DE69400112T2/en
Priority to AU31695/95A priority patent/AU3169595A/en
Priority to PCT/FR1995/001075 priority patent/WO1996004823A1/en
Priority to JP8507071A priority patent/JPH10503947A/en
Publication of EP0700651A1 publication Critical patent/EP0700651A1/en
Publication of EP0700651B1 publication Critical patent/EP0700651B1/en
Application granted granted Critical
Priority to GR960401290T priority patent/GR3019914T3/en
Priority to US08/795,414 priority patent/US5755490A/en
Priority to HK98106474A priority patent/HK1007268A1/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
    • A47C1/022—Reclining or easy chairs having independently-adjustable supporting parts
    • A47C1/023—Reclining or easy chairs having independently-adjustable supporting parts the parts being horizontally-adjustable seats ; Expandable seats or the like, e.g. seats with horizontally adjustable parts
    • 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
    • A47C3/026—Rocking chairs with seat, or seat and back-rest unit elastically or pivotally mounted in a rigid base frame with central column, e.g. rocking office chairs; Tilting chairs

Definitions

  • the present invention relates to a new structure for office chairs and the like, of the general type comprising, essentially, pivotally mounted front to rear on a vertical base column, a set, often made in a single piece, bringing together a generally horizontal seat and a generally vertical backrest.
  • a seat may or may not include armrests, and numerous variants have been proposed, so that it ensures the best comfort for the user, taking into account its size and position.
  • the structure according to the present invention represents both a simplification and an improvement to such prior embodiments.
  • a seat of the general type mentioned above means are provided for allowing the adjustment of said seat and said back, respectively in length and in height with respect to said tilting assembly, depending on the size and position of the user, to ensure the best comfort.
  • said adjustment means consist, for the backrest, in the combination of a pair of parallel slides, formed in said back portion of said piece, with corresponding plates projecting from the rear of said movable portion forming a backrest.
  • said adjustment means consist in the cooperation of guide plates of said movable seated portion with a transverse plate for reinforcing the horizontal portion of said part.
  • said tilting assembly constituting a single piece molded in plastic material, the latter forms a hollow shell open upwards and forwards, and comprising a substantially horizontal wing and a substantially vertical wing, each of these two wings having side edges oriented inward and in which slide respectively said movable portions forming the seat and the backrest.
  • the term “parallel” means that said slides are spaced apart by a constant distance, and can be both straight and curved. In the case where they are rectilinear, the plates have any length, but in the case where they are curved, the plates are either relatively flexible to conform constantly to the curvature of this curve, or relatively short, to follow said curvature without deformation.
  • the adjustment of the total length of the seat and the total height of the back therefore results from the degree of sliding forwards or backwards, and upwards and downwards, respectively, of the movable portions relative to the tilting assembly, considered fixed in this respect, although tilting relative to the base.
  • This sliding can be done by simple traction or thrust exerted in the desired direction on the mobile portion considered.
  • this portion should be locked in this position, for example by means of a pivoting eccentric cam controlled by a lever. This is particularly the case for the mobile portion of the seat.
  • the invention aims at a particularly simple and effective positive control.
  • a cursor in the "back" portion of the assembly, that is to say the fixed vertical outer face, a cursor can move along a substantially horizontal guide, while the end of this cursor projecting towards the interior passes through a slit made obliquely in the movable portion.
  • the latter exerts on said slot an action with a vertical component causing the vertical displacement of the movable portion, and blocking this displacement to any desired degree, or step by step, according to the profile of said slot.
  • the movement of the moving portions is guided essentially by the cooperation of the aforementioned adjustment means. It can be supplemented when the mobile portions have a certain volume, as will be explained below, by the guidance provided by the edges oriented towards the inside of the molded shell constituting the rocking assembly on the external surface, generally upholstered, mobile portions, to which they constitute an aesthetic framework.
  • the invention also relates to an additional improvement aimed at increasing the comfort of these seats. Indeed, at the time of the rearward tilting of the "fixed" seat / back assembly, the seat portion tends to rise, which can create some discomfort at the knees. To avoid this constraint, provision is made, according to the invention, to provide, in the movable portion of the seat, an anterior part maintained horizontal by sliding on an extension of the fixed base, by virtue of a zone of said movable portion forming a hinge. horizontal. Given the relatively small clearance due to tilting, said front part hardly lifts, whatever the degree of sliding of this movable portion of the seat.
  • said movable sliding portions of the seat and the back instead of being produced by injection or thermoforming as was the practice until now, which creates hard and uncomfortable parts, are produced by the technique known as extrusion - blowing, creating hollow volumes with relatively flexible walls, which it is possible to adapt in thickness so that these portions constitute real comfortable "cushions".
  • the amount of material used to produce such cushions is proportionally less important than for the solid parts obtained by injection, from which there results a substantial saving.
  • This assembly is pivotally mounted on the vertical column of a conventional base, which is not part of the invention.
  • the shell C is a single molded part which consists of a horizontal portion 1 and a vertical portion 2, shown here substantially perpendicular.
  • Each of the portions 1 and 2 has a bottom, respectively 1 'and 2', and rounded edges or wings, namely 3 for the horizontal portion 1 and 4 for the vertical portion 2.
  • the curvature of these wings is oriented towards the interior of the seat, and its thickness is adapted to the thickness of the seat A and of the backrest D in the "dressed" state, as explained in more detail below.
  • the bottom 1 ′ of the horizontal portion 1 of the shell C is fixed to the tilting element located at the top of the base column, this tilting element pivoting elastically around d 'a horizontal axis 5 ( Figures 3 and 6). Furthermore, on the upper part of said column are mounted a pair of fixed horizontal profiles 6 ( Figure 3) located at the front relative to the bottom 1 '.
  • the whole of the shell C can tilt backwards, as indicated in broken lines in FIG. 3, while the sections 6 remain horizontal.
  • the mobile seat A is adapted, as illustrated in FIGS. 4, 5 and 6.
  • This movable seat consists of a front portion 7 forming a "cushion" preferably obtained by the blowing extrusion technique, and of a rear portion 8, comprising lateral plates 9, and connected to the front portion 7 by a zone relatively thin 10, forming a hinge between the two.
  • a tab 11 having a series of lights 12 (FIG. 5), intended for adjusting the position of the seat A, by means of a stud 13 carried by a lever 14 pivotally mounted about a horizontal axis and can be operated from the outside by a button 15 ( Figures 1 'and 3).
  • the seat A is inserted in the horizontal portion 1 of the shell C as it appears in FIGS. 4 and 6, the guide plates 9 along the underside of the flanges 3 and the transverse reinforcement plate 16, and the front portion 7 being enveloped by said flanges 3, while the profiles 6 are housed in holes 17 provided in the thickness of said front portion 7, so that the thin zone 10 comes to be located approximately towards the front edge of the bottom 1 ′, according to the setting of seat A.
  • the seat A is therefore slidably mounted front to rear in the horizontal portion 1 of the shell C, the degree of this sliding dependent on that of the slots 12 in which the stud 13 is inserted, and the guidance of this sliding being ensured , on the rear part, by the edges 3 of the horizontal portion 1 of the shell C, and on the front part by the sliding of the profiles 6 in the holes 17.
  • the comfort of the user is ensured at the same time, whatever this degree of sliding forward or towards the rear, and whatever the degree of tilting of the shell C towards the rear, thanks to the thin zone 10 which ensures the transition between the horizontal part fixed by the profiles 6 and the tilting part, defined by the flanges 3.
  • the rearward stroke of the seat A is limited so as to leave a certain clearance 19 to allow the passage of the backrest D once dressed.
  • said backrest D is movable in height, independently of the seat A.
  • said folder D includes an upper portion 20 and a lower portion 21.
  • the upper portion 20 is produced by blow molding in the form of a "cushion" whose shape corresponds to that of the edges 4 of the vertical portion 2 of the shell C, the lower portion 21, also produced by blow molding comprising, coming from molding projecting on its rear face, male parts or plates 22 sliding in corresponding grooves 23 of the front face of said vertical portion 2 of the shell C ( Figure 3).
  • the button 29 of the cursor 24, integral of the lug 25, has a vertical section in the shape of an inverted U, the bottom of which rests on the upper edge of said lower portion 28 and is guided by the lower edge of said upper portion 27, so that the cursor 24 cannot move only horizontally, that in this same horizontal movement, but that, during this same horizontal movement, the lug 25, exerting pressure on the upper or lower edge respectively of the groove 25 ', forces the backrest er D to be raised or lowered respectively, remaining guided vertically by the flanges 4 and the grooves 23.
  • the back D is intended to be "dressed", that is to say coated with a certain thickness of a decorative fabric. It's for this reason that the seat A is mounted in the horizontal portion 1 of the shell C with a certain clearance 19 at the rear (FIG. 4).
  • this system is applicable not only to chairs, as shown, but to armchairs having different arms or legs with tilting. It is also applicable to sled type seats, in which the seat is non-tilting, in which the hinge portion 10 of part A is no longer useful.
  • the invention also relates, as an independent characteristic, to the height adjustment system of the backrest.

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  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Plural Heterocyclic Compounds (AREA)
  • Graft Or Block Polymers (AREA)
  • Table Devices Or Equipment (AREA)
  • Laminated Bodies (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Hydrogenated Pyridines (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
  • Exchange Systems With Centralized Control (AREA)

Abstract

The chair, made with a seat which tilts to the front and back on a vertical supporting column, has an assembly which connects the seat and back and allows them to be adjusted independently according to the size of the user. The back adjuster has parallel sliders on the back section of the tilting assembly, and corresponding components on the rear surface of the chair back and guide plates on the underside of the seat to interact with a transverse reinforcing plate The tilting assembly comprises a single moulded plastics shell with its back and seat portions set at right angles to one another, with each portion having turned-in edges to provide sliding surfaces for the seat and back. The assembly is produced by an extrusion/blow moulding process.

Description

La présente invention concerne une nouvelle structure pour sièges de bureaux et analogues, du type général comprenant, pour l'essentiel, monté basculant d'avant en arrière sur une colonne de piétement vertical, un ensemble, souvent réalisé en une pièce unique, réunissant une assise d'allure générale horizontale et un dossier d'allure générale verticale. Un tel siège peut, ou non, comporter des accoudoirs, et de très nombreuses variantes en ont été proposées, pour qu'il assure le meilleur confort à l'utilisateur, compte tenu de sa taille et de sa position.The present invention relates to a new structure for office chairs and the like, of the general type comprising, essentially, pivotally mounted front to rear on a vertical base column, a set, often made in a single piece, bringing together a generally horizontal seat and a generally vertical backrest. Such a seat may or may not include armrests, and numerous variants have been proposed, so that it ensures the best comfort for the user, taking into account its size and position.

Ainsi, dans le EUR-A-0 309 368, la déposante a décrit un tel siège dans lequel l'assise et le dossier sont moulés en une seule pièce, montée basculante par la portion avant de l'assise sur le piétement, tandis que le dossier possède une structure permettant séparément sa déformation contrôlée vers l'arrière. Un tel siège procure un ensemble de propriétés ergonomiques exceptionnelles, mais il est de réalisation relativement compliquée et par conséquent coûteuse.Thus, in EUR-A-0 309 368, the applicant has described such a seat in which the seat and the backrest are molded in one piece, pivotally mounted by the front portion of the seat on the base, while the back has a structure allowing its controlled deformation backwards separately. Such a seat provides a set of exceptional ergonomic properties, but it is relatively complicated and therefore expensive to produce.

La structure selon la présente invention représente à la fois une simplification et une amélioration à de telles réalisations antérieures.The structure according to the present invention represents both a simplification and an improvement to such prior embodiments.

A cet effet, selon l'invention, dans un siège du type général évoqué plus haut, des moyens sont prévus pour permettre séparément le réglage de ladite assise et dudit dos, respectivement en longueur et en hauteur par rapport audit ensemble basculant, en fonction de la taille et de la position de l'utilisateur, pour lui assurer le meilleur confort.To this end, according to the invention, in a seat of the general type mentioned above, means are provided for allowing the adjustment of said seat and said back, respectively in length and in height with respect to said tilting assembly, depending on the size and position of the user, to ensure the best comfort.

Selon un mode de réalisation préféré de l'invention, lesdits moyens de réglage consistent, pour le dossier, dans la combinaison d'un couple de glissières parallèles, pratiquées dans ladite portion dos de ladite pièce, avec des plaquettes correspondantes en saillie sur l'arrière de ladite portion mobile formant dossier. Pour la portion assise, lesdits moyens de réglage consistent dans la coopération de plaquettes de guidage de ladite portion assise mobile avec une plaque transversale de renforcement de la portion horizontale de ladite pièce.According to a preferred embodiment of the invention, said adjustment means consist, for the backrest, in the combination of a pair of parallel slides, formed in said back portion of said piece, with corresponding plates projecting from the rear of said movable portion forming a backrest. For the seated portion, said adjustment means consist in the cooperation of guide plates of said movable seated portion with a transverse plate for reinforcing the horizontal portion of said part.

Plus spécialement encore, ledit ensemble basculant constituant une pièce unique moulée en matière plastique, cette dernière forme une coque creuse ouverte vers le haut et vers l'avant, et comportant une aile sensiblement horizontale et une aile sensiblement verticale, chacune de ces deux ailes présentant des rebords latéraux orientés vers l'intérieur et dans lesquelles viennent coulisser respectivement lesdites portions mobiles formant l'assise et le dossier.More specifically still, said tilting assembly constituting a single piece molded in plastic material, the latter forms a hollow shell open upwards and forwards, and comprising a substantially horizontal wing and a substantially vertical wing, each of these two wings having side edges oriented inward and in which slide respectively said movable portions forming the seat and the backrest.

Il doit être bien entendu que par "sensiblement horizontal" ou "d'allure générale horizontale" et "sensiblement vertical" ou "d'allure générale verticale", il est fait référence à la direction générale de l'assise et du dos, respectivement, qui sont nécessairement plus ou moins inclinées en fonction du degré de basculement de l'ensemble qu'elles forment.It should be understood that by "substantially horizontal" or "generally horizontal in appearance" and "substantially vertical" or "generally in general vertical", we are referring to the general direction of the seat and back, respectively , which are necessarily more or less inclined depending on the degree of tilting of the assembly that they form.

De même, le terme "parallèle" signifie que lesdites glissières sont écartées d'une distance constante, et peuvent être aussi bien rectilignes que galbées. Dans le cas où elles sont rectilignes, les plaquettes ont une longueur quelconque, mais dans le cas où elles sont galbées, les plaquettes sont, soit relativement souples pour se conformer constamment à la courbure de ce galbe, soit relativement courtes, pour suivre ladite courbure sans déformation.Likewise, the term "parallel" means that said slides are spaced apart by a constant distance, and can be both straight and curved. In the case where they are rectilinear, the plates have any length, but in the case where they are curved, the plates are either relatively flexible to conform constantly to the curvature of this curve, or relatively short, to follow said curvature without deformation.

Le réglage de la longueur totale de l'assise et de la hauteur totale du dos résulte donc du degré de coulissement vers l'avant ou l'arrière, et vers le haut et le bas, respectivement, des portions mobiles par rapport à l'ensemble basculant, considéré comme fixe à cet égard, bien que basculant par rapport au piétement.The adjustment of the total length of the seat and the total height of the back therefore results from the degree of sliding forwards or backwards, and upwards and downwards, respectively, of the movable portions relative to the tilting assembly, considered fixed in this respect, although tilting relative to the base.

Ce coulissement peut se faire par simple traction ou poussée exercée dans le sens voulu sur la portion mobile considérée. Une fois la position souhaitée atteinte, il convient de bloquer cette portion dans cette position, par exemple au moyen d'une came excentrique pivotante commandée par un levier. C'est notamment le cas pour la portion mobile de l'assise.This sliding can be done by simple traction or thrust exerted in the desired direction on the mobile portion considered. Once the desired position has been reached, this portion should be locked in this position, for example by means of a pivoting eccentric cam controlled by a lever. This is particularly the case for the mobile portion of the seat.

Dans le cas de la portion mobile du dos, l'invention vise une commande positive particulièrement simple et efficace. A cet effet, dans la portion "dos" de l'ensemble, c'est à dire la face extérieure verticale fixe, peut se déplacer un curseur le long d'un guide sensiblement horizontal, tandis que l'extrémité de ce curseur dépassant vers l'intérieur traverse une fente pratiquée obliquement dans la portion mobile. En déplaçant horizontalement ce curseur, ce dernier exerce sur ladite fente une action à composante verticale provoquant le déplacement vertical de la portion mobile, et bloquant ce déplacement à tout degré souhaité, ou pas à pas, selon le profil de ladite fente.In the case of the movable portion of the back, the invention aims at a particularly simple and effective positive control. For this purpose, in the "back" portion of the assembly, that is to say the fixed vertical outer face, a cursor can move along a substantially horizontal guide, while the end of this cursor projecting towards the interior passes through a slit made obliquely in the movable portion. By moving this cursor horizontally, the latter exerts on said slot an action with a vertical component causing the vertical displacement of the movable portion, and blocking this displacement to any desired degree, or step by step, according to the profile of said slot.

D'autres moyens de commande pourraient être utilisés, par exemple un système à pignon-crémaillère, mais aux dépends du bon marché de ce matériel, simple par définition.Other control means could be used, for example a rack and pinion system, but at the expense of the cheapness of this equipment, simple by definition.

Le guidage du déplacement des portions mobiles est essentiellement assuré par la coopération des moyens de réglage précités. Il peut se trouver complété quand les portions mobiles ont une certain volume, comme il sera exposé plus loin, par le guidage procuré par les rebords orientés vers l'intérieur de la coque moulée constituant l'ensemble basculant sur la surface extérieure, généralement tapissée, des portions mobiles, à laquelle elles constituent un cadre esthétique.The movement of the moving portions is guided essentially by the cooperation of the aforementioned adjustment means. It can be supplemented when the mobile portions have a certain volume, as will be explained below, by the guidance provided by the edges oriented towards the inside of the molded shell constituting the rocking assembly on the external surface, generally upholstered, mobile portions, to which they constitute an aesthetic framework.

L'invention vise encore un perfectionnement supplémentaire visant à accroître le confort de ces sièges. En effet, au moment du basculement vers l'arrière de l'ensemble assise / dos "fixe", la portion assise tend à se relever, ce qui peut créer un certain inconfort au niveau des genoux. Pour éviter cette contrainte, il est prévu, selon l'invention, de ménager, dans la portion mobile de l'assise, une partie antérieure maintenue horizontale par glissement sur un prolongement du piétement fixe, grâce à une zone de ladite portion mobile formant charnière horizontale. Compte tenu du débattement relativement faible dû au basculement, ladite partie antérieure ne se soulève pratiquement pas, quelque soit le degré de coulissement de cette portion mobile de l'assise.The invention also relates to an additional improvement aimed at increasing the comfort of these seats. Indeed, at the time of the rearward tilting of the "fixed" seat / back assembly, the seat portion tends to rise, which can create some discomfort at the knees. To avoid this constraint, provision is made, according to the invention, to provide, in the movable portion of the seat, an anterior part maintained horizontal by sliding on an extension of the fixed base, by virtue of a zone of said movable portion forming a hinge. horizontal. Given the relatively small clearance due to tilting, said front part hardly lifts, whatever the degree of sliding of this movable portion of the seat.

Enfin, selon une caractéristique importante de l'invention, lesdites portions mobiles coulissantes de l'assise et du dos, au lieu d'être réalisée par injection ou thermoformage comme c'était l'usage jusqu'à ce jour, ce qui crée des pièces dures et inconfortables, sont réalisées par la technique dite d'extrusion - soufflage, créant des volumes creux à parois relativement souples, qu'il est possible d'adapter en épaisseur pour que ces portions constituent de véritables "coussins" confortables. Au surplus, la quantité de matière utilisée pour réaliser de tels coussins est proportionnellement moins importante que pour les pièces pleines obtenues par injection, d'où il résulte une économie substantielle.Finally, according to an important characteristic of the invention, said movable sliding portions of the seat and the back, instead of being produced by injection or thermoforming as was the practice until now, which creates hard and uncomfortable parts, are produced by the technique known as extrusion - blowing, creating hollow volumes with relatively flexible walls, which it is possible to adapt in thickness so that these portions constitute real comfortable "cushions". In addition, the amount of material used to produce such cushions is proportionally less important than for the solid parts obtained by injection, from which there results a substantial saving.

Dans un tel cas, il est encore avantageux, selon l'invention, de créer sur la surface périphérique latérale des portions mobiles creuses, des rainures permettant la mise en place, sur la face antérieure de ces portions, d'un tapissage au moyen d'un simple cordon de serrage, plus simplement que par la technique d'agrafage, exigé par les pièces injectées plus minces.In such a case, it is also advantageous, according to the invention, to create on the lateral peripheral surface of the hollow mobile portions, grooves allowing the establishment, on the front face of these portions, of a lining by means of '' a simple drawstring, simpler than by the stapling technique, required by thinner injected parts.

D'autres détails, caractéristiques et avantages de l'invention apparaîtront de la description ci-après d'un mode de réalisation préféré, et correspondant aux dessins annexés sur lesquels :

  • Les figures 1 et 2 sont des vues respectivement de face et de profil de l'ensemble de la coque et de l'assise et du dossier "habillés" en place, et la figure 1' est une vue de dos prise par dessous du même ensemble.
  • La figure 3 est une vue de face de la coque seule.
  • La figure 4 est une vue de dessus de l'assise non habillée en place.
  • Les figures 5 et 6 sont des vues de dessous de l'assise non habillée, seule et en place, respectivement.
  • Les figures 7 et 8 sont des vues de dos du dossier non habillé, seul et en place, respectivement.
Other details, characteristics and advantages of the invention will appear from the following description of a preferred embodiment, and corresponding to the appended drawings in which:
  • Figures 1 and 2 are respectively front and side views of the entire shell and seat and back "dressed" in place, and Figure 1 'is a back view taken from below of the same together.
  • Figure 3 is a front view of the shell alone.
  • Figure 4 is a top view of the seat not dressed in place.
  • Figures 5 and 6 are views from below of the seat unadorned, alone and in place, respectively.
  • Figures 7 and 8 are back views of the unclothed backrest, alone and in place, respectively.

Sur l'ensemble des figures 1 à 7, on a désigné les éléments du système selon l'invention par :

  • A : Assise mobile, qu'elle soit "habillée" ou non,
  • D : Dossier mobile, qu'il soit "habillé" ou non, et
  • C : Coque creuse, destinée à recevoir l'assise A et le dossier D.
In all of FIGS. 1 to 7, the elements of the system according to the invention have been designated by:
  • A: Mobile seat, whether "dressed" or not,
  • D: Mobile file, whether "dressed" or not, and
  • C: Hollow shell, intended to receive the seat A and the backrest D.

Cet ensemble est monté basculant sur la colonne verticale d'un piétement classique, qui ne fait pas partie de l'invention.This assembly is pivotally mounted on the vertical column of a conventional base, which is not part of the invention.

Comme le montrent notamment les figures 1' et 3, la coque C est une pièce unique moulée qui se compose d'une portion horizontale 1 et d'une portion verticale 2, représentées ici sensiblement perpendiculaires.As shown in particular in Figures 1 'and 3, the shell C is a single molded part which consists of a horizontal portion 1 and a vertical portion 2, shown here substantially perpendicular.

Chacune des portions 1 et 2 comporte un fond, respectivement 1' et 2', et des rebords ou ailes arrondis, à savoir 3 pour la portion horizontale 1 et 4 pour la portion verticale 2. La courbure de ces ailes est orientée vers l'intérieur du siège, et son épaisseur est adaptée à l'épaisseur de l'assise A et du dossier D à l'état "habillé", comme expliqué plus en détail ci-après.Each of the portions 1 and 2 has a bottom, respectively 1 'and 2', and rounded edges or wings, namely 3 for the horizontal portion 1 and 4 for the vertical portion 2. The curvature of these wings is oriented towards the interior of the seat, and its thickness is adapted to the thickness of the seat A and of the backrest D in the "dressed" state, as explained in more detail below.

Comme il apparaît notamment aux figures 2, 3 et 6, le fond 1' de la portion horizontale 1 de la coque C est fixé à l'élément basculant situé à la partie supérieure de la colonne du piétement, cet élément basculant pivotant élastiquement autour d'un axe horizontal 5 (figures 3 et 6). Par ailleurs, sur la partie supérieure de ladite colonne sont montés un couple de profilés horizontaux fixes 6 (figure 3) situés à l'avant par rapport au fond 1'.As it appears in particular in FIGS. 2, 3 and 6, the bottom 1 ′ of the horizontal portion 1 of the shell C is fixed to the tilting element located at the top of the base column, this tilting element pivoting elastically around d 'a horizontal axis 5 (Figures 3 and 6). Furthermore, on the upper part of said column are mounted a pair of fixed horizontal profiles 6 (Figure 3) located at the front relative to the bottom 1 '.

Par cette disposition, l'ensemble de la coque C peut basculer vers l'arrière, comme indiqué en trait interrompu sur la figure 3, tandis que les profilés 6 demeurent horizontaux.By this arrangement, the whole of the shell C can tilt backwards, as indicated in broken lines in FIG. 3, while the sections 6 remain horizontal.

Dans la portion horizontale 1 de la coque C vient s'adapter l'assise mobile A, comme l'illustrent les figures 4, 5 et 6.In the horizontal portion 1 of the shell C, the mobile seat A is adapted, as illustrated in FIGS. 4, 5 and 6.

Cette assise mobile se compose d'une portion avant 7 formant "coussin" obtenue de préférence par la technique d'extrusion soufflage, et d'une portion arrière 8, comportant des plaquettes latérales 9, et reliée à la portion avant 7 par une zone relativement mince 10, formant charnière entre les deux.This movable seat consists of a front portion 7 forming a "cushion" preferably obtained by the blowing extrusion technique, and of a rear portion 8, comprising lateral plates 9, and connected to the front portion 7 by a zone relatively thin 10, forming a hinge between the two.

Sous la surface de la portion arrière 8 est prévue une patte 11 présentant une série de lumières 12 (figure 5), destinées au réglage de la position de l'assise A, au moyen d'un téton 13 porté par un levier 14 monté basculant autour d'un axe horizontal et pouvant être manoeuvré de l'extérieur par un bouton 15 (figures 1' et 3).Under the surface of the rear portion 8 is provided a tab 11 having a series of lights 12 (FIG. 5), intended for adjusting the position of the seat A, by means of a stud 13 carried by a lever 14 pivotally mounted about a horizontal axis and can be operated from the outside by a button 15 (Figures 1 'and 3).

L'assise A est insérée dans la portion horizontale 1 de la coque C comme il apparaît aux figures 4 et 6, les plaquettes de guidage 9 suivant la face inférieure des rebords 3 et la plaque de renfort transversale 16, et la portion avant 7 étant enveloppée par lesdits rebords 3, tandis que les profilés 6 viennent se loger dans des trous 17 prévus dans l'épaisseur de ladite portion avant 7, de telle manière que la zone mince 10 vient se situer approximativement vers le bord avant du fond 1', selon le réglage de l'assise A.The seat A is inserted in the horizontal portion 1 of the shell C as it appears in FIGS. 4 and 6, the guide plates 9 along the underside of the flanges 3 and the transverse reinforcement plate 16, and the front portion 7 being enveloped by said flanges 3, while the profiles 6 are housed in holes 17 provided in the thickness of said front portion 7, so that the thin zone 10 comes to be located approximately towards the front edge of the bottom 1 ′, according to the setting of seat A.

L'assise A est donc montée coulissante d'avant en arrière dans la portion horizontale 1 de la coque C, le degré de ce coulissement dépendant de celle des lumières 12 dans laquelle est inséré le téton 13, et le guidage de ce coulissement étant assuré, sur la partie arrière, par les rebords 3 de la portion horizontale 1 de la coque C, et sur la partie avant par le coulissement des profilés 6 dans les trous 17.The seat A is therefore slidably mounted front to rear in the horizontal portion 1 of the shell C, the degree of this sliding dependent on that of the slots 12 in which the stud 13 is inserted, and the guidance of this sliding being ensured , on the rear part, by the edges 3 of the horizontal portion 1 of the shell C, and on the front part by the sliding of the profiles 6 in the holes 17.

Selon une caractéristique intéressante de l'invention, le confort de l'usager est assuré à la fois, quelque soit ce degré de coulissement vers l'avant ou vers l'arrière, et quelque soit le degré de basculement de la coque C vers l'arrière, grâce à la zone mince 10 qui assure la transition entre la partie horizontale fixée par les profilés 6 et la partie basculante, définie par les rebords 3.According to an advantageous characteristic of the invention, the comfort of the user is ensured at the same time, whatever this degree of sliding forward or towards the rear, and whatever the degree of tilting of the shell C towards the rear, thanks to the thin zone 10 which ensures the transition between the horizontal part fixed by the profiles 6 and the tilting part, defined by the flanges 3.

Comme on le voit sur la figure 4, la course vers l'arrière de l'assise A est limitée de manière à laisser subsister un certain jeu 19 pour permettre le passage du dossier D une fois habillé.As can be seen in FIG. 4, the rearward stroke of the seat A is limited so as to leave a certain clearance 19 to allow the passage of the backrest D once dressed.

Selon une caractéristique importante de l'invention, ledit dossier D est mobile en hauteur, indépendamment de l'assise A.According to an important characteristic of the invention, said backrest D is movable in height, independently of the seat A.

A cet effet, comme le montre la figure 3, ledit dossier D comporte une portion supérieure 20 et une portion inférieure 21.To this end, as shown in FIG. 3, said folder D includes an upper portion 20 and a lower portion 21.

La portion supérieure 20 est réalisée par extrusion soufflage sous forme d'un "coussin" dont la forme correspond à celle des rebords 4 de la portion verticale 2 de la coque C, la portion inférieure 21, également réalisée par extrusion soufflage comportant, venues de moulage en saillie sur sa face arrière, des parties mâles ou plaquettes 22 venant coulisser dans des rainures correspondantes 23 de la face avant de ladite portion verticale 2 de la coque C (figure 3).The upper portion 20 is produced by blow molding in the form of a "cushion" whose shape corresponds to that of the edges 4 of the vertical portion 2 of the shell C, the lower portion 21, also produced by blow molding comprising, coming from molding projecting on its rear face, male parts or plates 22 sliding in corresponding grooves 23 of the front face of said vertical portion 2 of the shell C (Figure 3).

Le guidage du coulissement du dossier D est donc assuré à la fois par les rebords 4 et les rainures 23.The guide of the sliding of the backrest D is therefore ensured by both the flanges 4 and the grooves 23.

Le réglage de la hauteur de ce coulissement est obtenu par un système original, se composant d'un curseur 24 dont un ergot horizontal 25 est monté coulissant dans une rainure oblique 25' pratiquée dans la face arrière du dossier D, et d'une glissière horizontale 26 résultant d'un décalage entre les portions supérieure 27 et inférieure 28 de la face arrière du fond 2' de la portion verticale 2 de la coque C, comme il apparaît aux figures 2 et 8. Le bouton 29 du curseur 24, solidaire du ergot 25, a une section verticale en forme de U renversé, dont le fond repose sur l'arête supérieure de ladite portion inférieure 28 et est guidé par l'arête inférieure de ladite portion supérieure 27, de sorte que le curseur 24 ne peut se déplacer qu'horizontalement, que dans ce même déplacement horizontal, mais que, pendant ce même déplacement horizontal, le ergot 25, exerçant une pression sur l'arête supérieure ou inférieure respectivement de la rainure 25', oblige le dossier D à monter ou descendre respectivement, en demeurant guidé verticalement par les rebords 4 et les rainures 23.The adjustment of the height of this sliding is obtained by an original system, consisting of a slider 24, a horizontal lug 25 of which is slidably mounted in an oblique groove 25 'made in the rear face of the backrest D, and a slide horizontal 26 resulting from a shift between the upper 27 and lower 28 portions of the rear face of the bottom 2 ′ of the vertical portion 2 of the shell C, as it appears in FIGS. 2 and 8. The button 29 of the cursor 24, integral of the lug 25, has a vertical section in the shape of an inverted U, the bottom of which rests on the upper edge of said lower portion 28 and is guided by the lower edge of said upper portion 27, so that the cursor 24 cannot move only horizontally, that in this same horizontal movement, but that, during this same horizontal movement, the lug 25, exerting pressure on the upper or lower edge respectively of the groove 25 ', forces the backrest er D to be raised or lowered respectively, remaining guided vertically by the flanges 4 and the grooves 23.

Bien entendu, comme l'assise A, le dossier D est destiné à être "habillé", c'est-à-dire revêtu d'une certaine épaisseur d'un tissu décoratif. C'est pour cette raison que l'assise A est montée dans la portion horizontale 1 de la coque C avec un certain jeu 19 à l'arrière (figure 4).Of course, like the seat A, the back D is intended to be "dressed", that is to say coated with a certain thickness of a decorative fabric. It's for this reason that the seat A is mounted in the horizontal portion 1 of the shell C with a certain clearance 19 at the rear (FIG. 4).

La description qui précède est donnée à titre d'exemple de mise en oeuvre de l'invention et il est bien entendu que cet exemple n'a aucun caractère limitatif, notamment en ce qui concerne la forme précise ou les dimensions des divers éléments du système constituant l'invention.The foregoing description is given by way of example of implementation of the invention and it is understood that this example has no limiting character, in particular as regards the precise shape or the dimensions of the various elements of the system. constituting the invention.

En particulier, ce système est applicable, non seulement aux chaises, comme représenté, mais aux fauteuils comportant des bras ou des piétements à basculement différents. Il est également applicable aux sièges du type traineau, dans lesquels l'assise est non-basculante, dans lesquels la portion charnière 10 de la pièce A n'étant plus utile.In particular, this system is applicable not only to chairs, as shown, but to armchairs having different arms or legs with tilting. It is also applicable to sled type seats, in which the seat is non-tilting, in which the hinge portion 10 of part A is no longer useful.

L'invention vise également, à titre de caractéristique indépendante, le système de réglage en hauteur du dossier.The invention also relates, as an independent characteristic, to the height adjustment system of the backrest.

L'invention est donc définie uniquement par les revendications suivantes.The invention is therefore defined only by the following claims.

Claims (11)

Siège de bureau, du type comprenant, monté basculant d'avant en arrière sur une colonne de piétement verticale, un ensemble réunissant une assise d'allure générale horizontale et un dossier d'allure générale verticale, caractérisé en ce que des moyens sont prévus pour permettre séparément le réglage de ladite assise et dudit dossier, respectivement en longueur et en hauteur par rapport audit ensemble, en fonction de la taille et de la position de l'utilisateur pour lui assurer le meilleur confort.Office chair, of the type comprising, tilting front to back on a vertical base column, an assembly bringing together a generally horizontal seat and a generally vertical backrest, characterized in that means are provided for separately allow the adjustment of said seat and said back, respectively in length and in height with respect to said assembly, as a function of the size and position of the user to provide him with the best comfort. Siège selon la revendication 1, caractérisé en ce que lesdits moyens consistent, pour le dossier, dans la combinaison d'un couple de glissières parallèles, pratiquées dans la portion dos dudit ensemble basculant, et de plaquettes correspondantes en saillie sur l'arrière dudit dossier, et, pour l'assise, de la coopération de plaquettes de guidage solidaire de ladite assise mobile avec une plaque transversale de renfort de la portion assise dudit ensemble basculant.Seat according to Claim 1, characterized in that the said means consist, for the backrest, in the combination of a pair of parallel slides, formed in the back portion of the said tilting assembly, and of corresponding plates projecting from the rear of the said backrest , and, for the seat, of the cooperation of guide plates integral with said movable seat with a transverse reinforcement plate of the seat portion of said tilting assembly. Siège selon les revendications 1 et 2, caractérisé en ce que, ledit ensemble basculant constitue une pièce unique moulée en matière plastique et formant une coque creuse comportant une aile sensiblement horizontale ouverte vers le haut et une aile sensiblement verticale ouverte vers l'avant, ces deux ailes étant raccordées par une zone angulaire d'environ 90°, et chacune de ces ailes présentant des rebords latéraux galbés vers l'intérieur et orientés respectivement vers le haut et vers l'avant, dans lesquelles viennent coulisser lesdites portions mobiles formant assise et dossier.Seat according to Claims 1 and 2, characterized in that the said tilting assembly constitutes a single piece molded from plastic material and forming a hollow shell comprising a substantially horizontal wing open upwards and a substantially vertical wing open forwards, these two wings being connected by an angular zone of approximately 90 °, and each of these wings having lateral edges curved inwards and oriented respectively upwards and forwards, in which slide said movable portions forming a seat and folder. Siège selon l'une quelconque des revendications 1-3, caractérisé en ce que des moyens sont prévus pour commander séparément le coulissement et/ou le blocage en toute position souhaitée respectivement de la portion mobile formant assise et de la portion mobile formant dossier.Seat according to any one of claims 1-3, characterized in that means are provided for separately controlling the sliding and / or locking in any desired position respectively of the movable portion forming the seat and the movable portion forming the backrest. Siège selon la revendication 4, caractérisé en ce que les moyens de commande et de blocage de la portion mobile horizontale formant assise par rapport à la portion assise de ladite coque est constituée par la combinaison d'une patte portée par ladite portion mobile et présentant plusieurs perforations réparties dans le sens avant-arrière, et d'un téton porté par un levier de commande monté basculant élastiquement sur ladite portion assise de la coque.Seat according to claim 4, characterized in that the means for controlling and blocking the horizontal movable portion forming a seat relative to the seated portion of said shell is formed by the combination of a tab carried by said movable portion and having several perforations distributed in the front-rear direction, and a nipple carried by a control lever mounted tilting elastically on said seat portion of the shell. Siège selon la revendication 4, caractérisé en ce que le moyen de commande et de blocage de la portion mobile formant dossier par rapport à la portion dos de l'ensemble basculant est un curseur monté mobile dans la face extérieure de la portion dos de l'ensemble basculant et soumis à un guide sensiblement horizontal, et coopérant avec une fente pratiquée obliquement dans la portion mobile formant dossier, de telle sorte qu'à tout déplacement horizontal provoqué de l'extérieur sur le curseur corresponde un déplacement vertical de la portion mobile formant dossier.Seat according to Claim 4, characterized in that the means for controlling and blocking the movable portion forming the backrest with respect to the back portion of the tilting assembly is a slider mounted to move in the external face of the back portion of the tilting assembly and subjected to a substantially horizontal guide, and cooperating with a slot made obliquely in the movable portion forming the backrest, so that any horizontal displacement caused from the outside on the slider corresponds to a vertical displacement of the movable portion forming folder. Siège selon l'une quelconque des revendications précédentes, caractérisé en ce que, dans le but d'éviter une contrainte exercée sous les genoux de l'utilisateur au moment du basculement vers l'arrière de l'ensemble basculant, la portion mobile formant assise comporte une partie antérieure maintenue horizontale par glissement sans soulèvement sur un prolongement horizontal du piétement fixe, notamment grâce à une zone formant charnière horizontale.Seat according to any one of the preceding claims, characterized in that, in order to avoid a stress exerted under the knees of the user at the time of the rearward tilting of the tilting assembly, the movable portion forming a seat has a front part held horizontal by sliding without lifting on a horizontal extension of the fixed base, in particular thanks to a zone forming a horizontal hinge. Siège selon l'une quelconque des revendications précédentes, caractérisé en ce que chacune des portions mobiles coulissantes est obtenue par la technique d'extrusion - soufflage sous forme de volumes creux à paroi souple, d'épaisseur adaptée pour présenter en tous points la souplesse assurant le meilleur confort à l'utilisateur.Seat according to any one of the preceding claims, characterized in that each of the movable sliding portions is obtained by the extrusion - blowing technique in the form of hollow volumes with flexible wall, of thickness adapted to present at all points the flexibility ensuring the best comfort for the user. Siège selon la revendication 8, caractérisé en ce que, sur la surface latérale périphérique de chaque volume creux est créé, au moulage, une rainure destinée à la mise en place, sur la face antérieure dudit volume, d'une gaine décorative maintenue tendue au moyen d'un cordon de serrage logé dans ladite rainure.Seat according to claim 8, characterized in that, on the peripheral lateral surface of each hollow volume is created, on molding, a groove intended for the positioning, on the front face of said volume, of a decorative sheath held taut at the by means of a drawstring housed in said groove. Siège selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il est du type "traîneau", dans lequel l'assise est non-basculante.Seat according to any one of the preceding claims, characterized in that it is of the "sled" type, in which the seat is non-tilting. Siège selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il ne comporte que le système de réglage en hauteur de la portion dossier mobile.Seat according to any one of the preceding claims, characterized in that it only comprises the system for adjusting the height of the movable back portion.
EP94112645A 1994-08-12 1994-08-12 Improved structure for office chairs Expired - Lifetime EP0700651B1 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
AT94112645T ATE135541T1 (en) 1994-08-12 1994-08-12 NEW STRUCTURE FOR OFFICE CHAIRS
ES94112645T ES2085178T3 (en) 1994-08-12 1994-08-12 NEW STRUCTURE FOR OFFICE SEATS.
EP94112645A EP0700651B1 (en) 1994-08-12 1994-08-12 Improved structure for office chairs
DK94112645.0T DK0700651T3 (en) 1994-08-12 1994-08-12 New office chair construction
DE69400112T DE69400112T2 (en) 1994-08-12 1994-08-12 New structure for office chairs
PCT/FR1995/001075 WO1996004823A1 (en) 1994-08-12 1995-08-10 Novel office chair structure
AU31695/95A AU3169595A (en) 1994-08-12 1995-08-10 Novel office chair structure
JP8507071A JPH10503947A (en) 1994-08-12 1995-08-10 New office chair structure
GR960401290T GR3019914T3 (en) 1994-08-12 1996-05-15 Improved structure for office chairs
US08/795,414 US5755490A (en) 1994-08-12 1997-02-04 Office chair structure
HK98106474A HK1007268A1 (en) 1994-08-12 1998-06-24 Improved structure for office chairs

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP94112645A EP0700651B1 (en) 1994-08-12 1994-08-12 Improved structure for office chairs

Publications (2)

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EP0700651A1 true EP0700651A1 (en) 1996-03-13
EP0700651B1 EP0700651B1 (en) 1996-03-20

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US (1) US5755490A (en)
EP (1) EP0700651B1 (en)
JP (1) JPH10503947A (en)
AT (1) ATE135541T1 (en)
AU (1) AU3169595A (en)
DE (1) DE69400112T2 (en)
DK (1) DK0700651T3 (en)
ES (1) ES2085178T3 (en)
GR (1) GR3019914T3 (en)
HK (1) HK1007268A1 (en)
WO (1) WO1996004823A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD924590S1 (en) * 2019-07-11 2021-07-13 Itoki Corporation Chair
USD912422S1 (en) * 2019-12-05 2021-03-09 39F Usa Inc Chair

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HK1007268A1 (en) 1999-04-09
DE69400112T2 (en) 1996-10-24
DE69400112D1 (en) 1996-05-23
ES2085178T3 (en) 1996-05-16
ATE135541T1 (en) 1996-04-15
US5755490A (en) 1998-05-26
WO1996004823A1 (en) 1996-02-22
JPH10503947A (en) 1998-04-14
EP0700651B1 (en) 1996-03-20
GR3019914T3 (en) 1996-08-31
AU3169595A (en) 1996-03-07
DK0700651T3 (en) 1996-08-19

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