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EP0208695B1 - Dispositif pour s'asseoir avec ressort pour le siege - Google Patents

Dispositif pour s'asseoir avec ressort pour le siege Download PDF

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Publication number
EP0208695B1
EP0208695B1 EP85904798A EP85904798A EP0208695B1 EP 0208695 B1 EP0208695 B1 EP 0208695B1 EP 85904798 A EP85904798 A EP 85904798A EP 85904798 A EP85904798 A EP 85904798A EP 0208695 B1 EP0208695 B1 EP 0208695B1
Authority
EP
European Patent Office
Prior art keywords
seat shell
spring
seat
support arm
tension spring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
EP85904798A
Other languages
German (de)
English (en)
Other versions
EP0208695A1 (fr
Inventor
Rolf Völkle
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.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19853500932 external-priority patent/DE3500932A1/de
Application filed by Individual filed Critical Individual
Priority to AT85904798T priority Critical patent/ATE45073T1/de
Publication of EP0208695A1 publication Critical patent/EP0208695A1/fr
Application granted granted Critical
Publication of EP0208695B1 publication Critical patent/EP0208695B1/fr
Expired 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
    • 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 invention relates to a piece of seating furniture, in particular for children and adolescents, with a seat shell and backrest, with a support bracket supported on the floor by the rollers of approximately horizontal support arms, the lower portion of which is determined by the height of the support arms and the rollers from the smallest possible distance from Floor, which section merges into a lower adjustment section outside a vertical parallel projection of the seat shell, which includes an angle of 90 ° or less to the lower horizontal section, which lower adjustment section merges into a further backward inclined adjustment section for the backrest,
  • a known seating of this type (DE-U-8 401 116.5) without variable seat part inclination has the advantage that when the seat part and backrest are adjusted in the same direction downwards or upwards, the available seating surface is reduced or enlarged in adaptation to the physiological leg length.
  • a screw spring is arranged and designed in an approximately vertical arrangement between the seat pan support and the support arm in such a way that the user of the seating furniture can sit relatively "softly” by resting on the support member with cushioning on the support arm with the coil spring compressed to the maximum.
  • a gradual gradation of the "softness" of the setting is possible by differently adjusting the preload of the helical spring that is subjected to pressure.
  • an armchair is also known (CH-PS-340 976), the seat of which is pivotally mounted on its front side about a transverse axis.
  • Helical springs supported on the transverse axis hold swiveling support arms with hook-shaped ends in a supporting position on the seat part when the armchair user assumes an upright sitting position. If the chair user leans backwards, the support arms are released from their support position. The seat swings downwards until an increasing equilibrium position is reached with the seat being constantly tilted backwards due to the increasing preload of the coil tension springs.
  • the object of the invention is to develop a piece of seating furniture of the type mentioned at the outset, the seat surface of which can be adjusted to the physiological length of the leg of the adolescent or child by adjusting the seat part and backrest, without any significant additional technical outlay in such a way that the seating furniture user already has one hand relatively slight changes in the center of gravity can cause a relatively strong rocking of the seat shell, and on the other hand unwanted rocking movements can be largely avoided, such rocking movement corresponding to a rocking movement which takes into account the urge to move, especially young users of seating furniture.
  • the energy accumulator of the spring device is formed by a helical spring that can only be loaded by tensile force, the pretension of which can be adjusted depending on the body weight such that the seat shell tilted backwards in contact with the stop in a central region of approximately 10 ° Swivel angle is held in suspension by the helical tension spring, the axis firmly connected to the seat pan support having a radial cantilever arm on which the rear articulated, approximately horizontally arranged, articulated in the direction of the screw axis (tension axis), hinged to a U-shaped bracket serving as the support arm Tension spring is articulated at a distance from the axis.
  • the arrangement of the support column behind the seat shell ie outside of a vertical parallel projection of this seat shell, enables the use of relatively large coil springs in a horizontal arrangement, in which the load potential does not have to be fully exploited.
  • this results in the possibility of an extremely deep lowering of the seat shell and, on the other hand, the prerequisite for the implementation of a spring device with an essentially linear characteristic. lso distant, the seating z. B. for children aged 4-6 years (Fig. 2), but also for young people aged 13-16 years and for adults (Fig. 1).
  • the different rocking needs depending on the body weight and temperament of the user of the seating furniture can be realized individually by adjusting the pre-tension of the screw spring accordingly.
  • the seat pan support With a relatively high preload, the seat pan support is held in suspension by the spring device at the upper limit of the middle range of the swivel angle with a relatively low seat part inclination.
  • Unintended rocking movements are much easier to avoid than with a low preload of the coil spring, which preload results in a relatively large inclination of the seat part backwards.
  • the spring space is sufficient to alternatively use coil springs of different lengths and thicknesses, in particular also those with a differently steep characteristic (“hard” or "soft” coil springs). It is desirable that relatively large rocking movements are possible due to slight arbitrary changes in the center of gravity.
  • a simple pretensioning device for the helical spring results in a design according to claim 4.
  • the seating is based on the fig. 1 - 10 described:
  • the armchair with upholstered (padding 27b) seat shell 27 and backrest 28 comprises a support column 12 supported on the floor via horizontal support arms 10. In the exemplary embodiment shown in the drawing, this runs behind the seat shell 27, so that, as can be seen from FIG. 2, it is extremely low can be adjusted.
  • the support column 12 is formed by a curved tube with tube legs running symmetrically to the vertical plane of symmetry b-b (FIGS. 5, 6), which merge into one another via a lower connecting web 12a and an upper connecting web 12e.
  • the lower connecting web 12a is firmly connected to a head disc 10b of a corresponding radius.
  • This head disc 10b has a concentric, vertical pin which is rotatably mounted in a pivot bearing 10c of the base frame.
  • This base frame is formed by the star-shaped support arms 10 with rollers 11.
  • the pipe legs of a lower horizontal section 12b of the support column 12 are bent over a central angle of over 90 ° and merge into a linear adjustment section 12c, which therefore includes an acute angle ⁇ (FIG. 1) to the vertical.
  • An approximately horizontal support arm 14, designed as a bracket, for the seat shell 27 is supported on the adjustment section 12c in a height-adjustable manner.
  • the adjustment section 12c for the seat shell 27 is followed by an oppositely inclined, linear adjustment section 12d for the backrest 28. This is displaceably and lockably supported by fastening elements 28a by means of sleeves 28b on pipe legs of this section 12d.
  • the support column 12 is formed from two bow-like parts, the pipe legs of which are telescopically connected at the lower end of the adjustment section 12c to form the joint f.
  • the tubular legs of the support arm 14, which merge into one another via the web 14a, have sections 14c which rise backwards, sleeve-side sections 14b and sections 14b which rise towards the front, as can be seen particularly from FIG. 3.
  • the rise angle of the mentioned sections 14c, 14b is approximately the same size and amounts to approximately 5-10 °.
  • FIG. 3 The manner in which the sleeves 14d for the support arm 14 and the same sleeves 28b of the fastening elements 28a for the backrest 28 can be locked on the associated tubular legs of the support column 12 can be seen in FIG. 3.
  • the sleeves 14d; 28b are lined with a plastic sleeve 14e, which can be pressed onto the jacket of the associated pipe leg with a set screw 14i for deformation.
  • a carrier (seat shell carrier 13) for the seat shell 27 is pivotally connected to the carrier arm 14 by means of a horizontal axis 42. This is pivotably mounted in the immediate vicinity of the area 27a of the seat shell 27 intended for supporting the hollow of the knee of the user of the seating furniture in the support arm 14.
  • the Swivel bearings 26 are formed by bores in vertically arranged tabs which are fastened on the semicircular web of the support arm 14.
  • the seat pan support 13 consists of angle profiles arranged symmetrically to the plane of symmetry bb, which are arranged mirror-symmetrically to one another. Horizontal profile legs 13h are attached to the seat shell 27.
  • Vertical profile legs 13v are each firmly connected to the adjacent free end of the axis 42, so that the seat pan support 13 forms a rigid, pivotable unit with the axis 42.
  • the axis 42 has a radial extension arm 35.
  • a tension spring 57 of the spring device F which is supported on the rear on the support arm 14, is articulated at a distance from the axis 42 on the extension arm 35 by means of hooks. It is designed as a helical tension spring 57 articulated on the rear of the support arm 14, as can be seen from FIGS. 3, 5, 6.
  • the Schrabenzugfeder can be pretensioned by means of a pretensioning device which comprises a threaded bolt 36 running in the pull axis a - a, which is in threaded engagement on the rear side with a pretensioning nut 40 supported on a stationary part of the seating furniture.
  • a pretensioning device which comprises a threaded bolt 36 running in the pull axis a - a, which is in threaded engagement on the rear side with a pretensioning nut 40 supported on a stationary part of the seating furniture.
  • An eye at the front end of the threaded bolt 36 is penetrated by a hook of the wire of the tension spring 57.
  • the biasing nut 40 is supported on a crossbar 14e of the support arm 14 via a washer 41.
  • the seat shell 27, which is inclined backwards at maximum tensile extension of the helical tension spring 57, can be freely pivoted about the axis 42 over a pivot angle ⁇ .
  • the seat shell 27 is kept suspended from the tension coil spring 57 within the central region M of the swivel angle a, that is to say with a tension stretch deviating from the maximum stretch c - c. as can be seen in particular from FIG. 4.
  • the tension axis a - a of the coil spring 57 extends approximately horizontally.
  • the swivel angle a is approximately 10 ° in the illustrated embodiment. It is limited by mechanical stops.
  • Elastic buffer elements 18 attached to the horizontal profile legs 13a limit the pivoting movement of the seat shell 27 downwards as stops. This pivoting movement is limited at the top by means of a tab 19 fastened to a vertical profile leg 13v of the seat part carrier 13, which engages behind a tubular leg of the carrier arm 14 with a bent stop end 19a (FIG. 3).
  • the cantilever arm 35 passes a position in which it is perpendicular to the pull axis a - a or it reaches such a position approximately at maximum tensile extension of the helical tension spring 57. With minimal tensile extension of the helical spring, the seat shell 27 is slightly inclined forward.
  • the reference numerals of components which are functionally comparable to the corresponding components in the exemplary embodiment described, but are designed differently, are provided with one or two index lines (e.g. support column 12 in FIGS. 6; 12 'in FIGS. 7, 8 and 12 "in FIG. 9).
  • the two further exemplary embodiments mentioned essentially differ from the exemplary embodiment according to FIGS. 1-6 in that the backrest 28'; 28" with the seat part carrier 13 forms a rigid unit which can be pivoted about the axis 42 by being connected to this seat part support 13 by means of a support tube 61 which is bent over an angle of more than 90 °.
  • This support tube with its lower end section 61a, which runs approximately parallel to the seat shell 27, is axially displaceable in a sleeve 60 and can be axially fixed in different positions by means of the locking screw 64.
  • This sleeve 60 is attached to a connection plate 62 which is welded to the angle profiles of the seat pan support 13.
  • a sleeve 28a 'or 28 "of the backrest 28' or 28" is fitted onto the upper end section 61b of the support tube 61 and can be locked at different heights by means of the adjusting screw 63.
  • the prestressing device is arranged on the front of the tension coil spring 57.
  • the preload nut 40 ' is supported on the extension arm 35'.
  • the helical tension spring is articulated on the support arm 14 via the crossbar 14e.
  • the tube legs of the support column 12 ' run vertically in the adjustment section 12c' and are bent backwards and horizontally in order to merge into one another via a web.
  • the tube legs of the support column 12 "in the adjustment section 12c" form an acute angle to the vertical and at the end of this adjustment section 12c "are bent into an opposite inclination in order to merge into one another via a web.
  • the support arm 14 '; 14 "and the associated sleeves 14d ';14d" correspond in structure and function to the support arm 14 with the associated sleeve 14d in the example of FIGS. 1-6.
  • a bearing axis 42a is received directly in the pivot bearings 26.
  • the bearing axis 42a is fully enclosed by sleeves 42b which are firmly connected to the bearing axis 42a.
  • the boom 35 is on the middle sleeve 42b welded.
  • Cover sleeves 42c which enclose the sleeves 42b, axially fix the axis 42 between the vertical profile legs 13v, which are welded at least to the bearing axis 42a, but expediently also to the end cover sleeves 42c, which in turn are fixedly connected to the bearing axis 42a via sleeves 42b are.
  • the seat shell 27 is pivoted downward about the axis 42 from a seat part inclination No according to FIG. 4. This results in a corresponding pivoting of the cantilever arm 35. through which the coil spring 57 is increasingly biased.
  • the swiveling movement which reduces the swivel angle, comes to a standstill due to the increasing pretension of the helical tension spring 57 in a central region M (FIG. 4) of the swivel angle.
  • the seat pan 27 In the standstill position, the seat pan 27 is held in suspension, unless the user changes his center of gravity significantly through active or unconscious movements. If the tension of the helical tension spring 57 is relatively large, the standstill position will rather lie in the upper part of the central region M.
  • Unwanted rocking movements can be avoided if the preload is relatively high. Desired rocking movements are easier with a relatively small preload and can be realized in a playful manner in a larger swivel angle range, the extreme seat part inclination Nu not being achieved as a rule.

Landscapes

  • Chairs Characterized By Structure (AREA)

Abstract

Le siège (27) du dispositif pour s'asseoir est articulé sur son bras de support (14) au moyen d'un axe horizontal (42) placé à son arête antérieure. Le bras de support (14) s'appuie à différentes hauteurs sur une colonne (12) située derrière le siège (27). L'accumulateur d'énergie d'un dispositif à ressort (F) est constitué par un ressort à boudin, dont la tension est réglable en fonction du poids du corps de manière à maintenir le siège (27) dans une zone médiane de l'angle de basculement du dispositif à ressort (F). De cette manière, l'utilisateur du dispositif peut causer un basculement proportionnellement important du siège (27) par un déplacement relativement faible du centre de gravité et éviter des mouvements de basculement involontaires.

Claims (5)

1. Siège, en particulier pour enfants et adolescents, avec cuvette d'assise (27) et dossier (28), muni d'un étrier de support (12) qui prend appui sur le sol par l'intermédiaire des roulettes de bras de support (10) à peu près horizontaux et dont la section inférieure (12b dans les fig. 1, 2; 12b' dans la fig. 7; 12b" dans la fig. 9) se trouve à une distance aussi faible que possible du sol déterminée par la hauteur des bras de support et des roulettes (11), laquelle section (12b; 12b'; 12b") se transforme, en dehors d'une projection parallèle verticale de la cuvette d'assise (27), en une section de réglage inférieure (12c dans les fig. 1, 2; 12c' dans la fig. 7 et 12c" dans la fig. 9) laquelle renferme avec la section inférieure horizontale (12b; 12b'; 12b") un angle de 90° (fig. 7) ou moins (fig. 1, 2, 9), le dossier (28) étant réglable dans le sens horizontal pour la modification de l'assise disponible, d'un bras de support (14) à peu près horizontal et pouvant prendre appui à des niveaux différents sur la section inférieure réglable (12c; 12c': 12c") ainsi que d'un axe horizontal (42) monté sur le bras de support (14) à proximité de la zone (27a) de la cuvette d'assise (27) et servant d'appui aux creux des genoux de l'utilisateur du siège, par l'intermédiaire duquel un support de cuvette d'assise (13) est rattaché au bras de support (14), et d'un système de ressort (F) appuyé sur le bras de support (14) et agissant sur le support de cuvette d'assise lequel système de ressort atténue le pivotement du support de cuvette d'assise (13) lors d'une diminution d'un angle de pivotement (a) limité par des butées (18, 19) et l'entraînant lors d'une augmentation, caractérisé en ce que l'accumulateur d'énergie du système de ressort (F) est constitué par au moins un ressort cylindrique de traction (57) qui peut être chargé uniquement par une force de traction et dont la précontrainte peut être réglée en fonction du poids du corps de telle façon que la cuvette d'assise (27), inclinée vers l'arrière lorsqu'elle est appliquée contre la butée (18), est maintenue en équilibre par le ressort cylindrique de traction (57) dans une zone médiane (M) de l'angle de pivotement (a) couvrant environ 10°, l'axe (42) solidaire du support de cuvette d'assise (13) présentant un bras-console radial (35) sur lequel le ressort cylindrique de traction (57) fixé du côté arrière à une traverse (14e) du bras de support en U (14) orienté à peu près horizontalement et sollicité dans la direction de l'axe du ressort (axe de traction a - a), est fixé à distance de l'axe (42).
2. Siège selon la revendication 1, caractérisé en ce que le dossier (28'; 28") forme avec le support d'assise (13) une unité rigide et qu'il est réglable par l'intermédiaire d'un tube de support (61) de forme coudée, dans un guidage (manchon 60) de l'élément d'assise (27) qui s'étend à peu parallèlement à l'assise (exemples de réalisation des fig. 7 à 10).
3. Cuvette d'assise selon l'une des revendications 1 ou 2, caractérisé en ce que, lors de l'extension maximale sous traction du ressort cylindrique de traction (57), le bras-console (35) est approximativement perpendiculaire à l'axe de traction (a - a) du ressort cylindrique de traction (57) et que la cuvette d'assise (27) est inclinée vers l'avant lorsque l'extension sous traction du ressort cylindrique de traction (57) est minimale.
4. Siège selon la revendication 3, caractérisé en ce que le ressort cylindrique de traction (57) peut être mis en précontrainte au moyen d'un dispositif de précontrainte qui comprend un boulon fileté (36) s'étendant dans l'axe de traction (a - a) et coopère avec un écrou de précontrainte (40) s'appuyant sur un élément stationnaire du siège.
5. Siège selon l'une des revendications 1 à 4, caractérisé en ce que l'axe (42) est monté dans des paliers pivotants (26) fixés sur une barrette semi-circulaire (14a) du bras de support en U (14), et que le support de cuvette d'assise (13) est solidarisé avec les extrémités libres de l'axe (42) par l'intermédiaire de branches profilées verticales (13v) de deux cornières disposées symétriquement par rapport au plan de symétrie (b - b).
EP85904798A 1985-01-12 1985-09-20 Dispositif pour s'asseoir avec ressort pour le siege Expired EP0208695B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85904798T ATE45073T1 (de) 1985-01-12 1985-09-20 Sitzmoebel mit feder fuer die sitzschale.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3500932 1985-01-12
DE19853500932 DE3500932A1 (de) 1984-01-14 1985-01-12 Sitzmoebel

Publications (2)

Publication Number Publication Date
EP0208695A1 EP0208695A1 (fr) 1987-01-21
EP0208695B1 true EP0208695B1 (fr) 1989-08-02

Family

ID=6259748

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85904798A Expired EP0208695B1 (fr) 1985-01-12 1985-09-20 Dispositif pour s'asseoir avec ressort pour le siege

Country Status (7)

Country Link
US (1) US4712835A (fr)
EP (1) EP0208695B1 (fr)
JP (1) JPH0753131B2 (fr)
AU (1) AU4957985A (fr)
CA (1) CA1250218A (fr)
DE (1) DE3571917D1 (fr)
WO (1) WO1986003954A1 (fr)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5042876A (en) * 1987-11-10 1991-08-27 Steelcase Inc. Controller for seating and the like
US5035467A (en) * 1988-09-15 1991-07-30 Pin Dot Products Seating system
USD340589S (en) 1989-10-11 1993-10-26 Steelcase Inc. Chair
DE4100641A1 (de) * 1991-01-11 1992-07-16 Kloeber Gmbh & Co Arbeitsstuhl mit synchron-neigungsmechanik
ATE106207T1 (de) * 1991-01-24 1994-06-15 Rolf Voelkle Stuhl, insbesondere für kinder und jugendliche.
DE9112861U1 (de) * 1991-10-16 1992-01-02 SIFA Sitzfabrik GmbH, 8458 Sulzbach-Rosenberg Vorrichtung zur Gewichtseinstellung für die Einstellung von Sitzflächen und Rückenlehnen bei Stühlen, insbesondere Bürodrehstühlen
NO934275D0 (no) * 1993-11-25 1993-11-25 Peter Opsvik Anordning ved en stol, spesielt en barnestol
NL1017192C2 (nl) * 2001-01-25 2002-07-26 Revab Bv Rolstoel voorzien van een zwenkvoorziening nabij de knie van een gebruiker.
USD463174S1 (en) 2001-11-30 2002-09-24 First Source Furniture Group, Llc Chair
US7290836B2 (en) * 2003-08-28 2007-11-06 A-Dec, Inc. Patient chair

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE488799A (fr) * 1948-09-21
DE820475C (de) * 1950-04-09 1951-11-12 Erich Isenberg Drehstuhl o. dgl., insbesondere Stahlrohrsessel mit schwebendem Sitz
NL85451C (fr) * 1955-06-02 1957-06-15
JPS445848Y1 (fr) * 1965-03-29 1969-03-03
US3322460A (en) * 1965-06-10 1967-05-30 Leverman Gerald Benedict Chair
US3339973A (en) * 1966-01-05 1967-09-05 Doerner Products Co Ltd Torsion spring chair control
CA869337A (en) * 1969-09-23 1971-04-27 Doerner Products Co. Limited Chair control with support for the torsion spring
US3627252A (en) * 1969-12-22 1971-12-14 Yoshiomi Yamaguchi Tilting chair
DE7830726U1 (de) * 1978-10-14 1979-02-08 Merz, Otto, Schaffhausen (Schweiz) Stuhl, insbesondere orchesterstuhl
JPS563046A (en) * 1979-06-21 1981-01-13 Mochida Pharm Co Ltd Ultrasonic tomographing diagnosing device
US4529247A (en) * 1982-04-15 1985-07-16 Herman Miller, Inc. One-piece shell chair
DE3401314A1 (de) * 1984-01-04 1985-07-11 Völkle Bürostühle GmbH, 7298 Loßburg Sitzmoebel fuer kinder und jugendliche

Also Published As

Publication number Publication date
JPS62501331A (ja) 1987-06-04
WO1986003954A1 (fr) 1986-07-17
DE3571917D1 (en) 1989-09-07
JPH0753131B2 (ja) 1995-06-07
US4712835A (en) 1987-12-15
AU4957985A (en) 1986-07-29
CA1250218A (fr) 1989-02-21
EP0208695A1 (fr) 1987-01-21

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