EP0341344B1 - Meuble servant de siège - Google Patents

Meuble servant de siège Download PDF

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Publication number
EP0341344B1
EP0341344B1 EP88120948A EP88120948A EP0341344B1 EP 0341344 B1 EP0341344 B1 EP 0341344B1 EP 88120948 A EP88120948 A EP 88120948A EP 88120948 A EP88120948 A EP 88120948A EP 0341344 B1 EP0341344 B1 EP 0341344B1
Authority
EP
European Patent Office
Prior art keywords
seat
spring
item
seating furniture
back rest
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
EP88120948A
Other languages
German (de)
English (en)
Other versions
EP0341344A3 (en
EP0341344A2 (fr
Inventor
F.-Martin Streifensand
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.)
F-Martin Steifensand Firma
Original Assignee
F-Martin Steifensand Firma
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by F-Martin Steifensand Firma filed Critical F-Martin Steifensand Firma
Publication of EP0341344A2 publication Critical patent/EP0341344A2/fr
Publication of EP0341344A3 publication Critical patent/EP0341344A3/de
Application granted granted Critical
Publication of EP0341344B1 publication Critical patent/EP0341344B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03255—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest with a central column, e.g. rocking office chairs
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • 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
    • A47C7/4454—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 of torsion type
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03266—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with adjustable elasticity
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03277—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with bar or leaf springs
    • A47C1/03279—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with bar or leaf springs of torsion type
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C1/00—Chairs adapted for special purposes
    • A47C1/02—Reclining or easy chairs
    • A47C1/031—Reclining or easy chairs having coupled concurrently adjustable supporting parts
    • A47C1/032—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest
    • A47C1/03261—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means
    • A47C1/03283—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with fluid springs
    • 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
    • A47C3/023—Rocking chairs having elastic frames made of tubular material
    • 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
    • A47C3/20—Chairs or stools with vertically-adjustable seats
    • A47C3/30—Chairs or stools with vertically-adjustable seats with vertically-acting fluid cylinder
    • 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
    • A47C7/02—Seat parts
    • A47C7/024—Seat parts with double seats

Definitions

  • the invention relates to seating furniture according to the preamble of patent claim 1.
  • a piece of seating furniture which has a base frame with a fixed base frame block, a seat support and a backrest support.
  • the seat support is pivotably articulated on the foot frame block about an axis running horizontally and transversely to the direction of view of a person sitting on the seating furniture, while the backrest support is articulated with the foot frame block and the seat support about second and third axes running parallel to the aforementioned first axis connected is.
  • the devices for synchronously coupled pivoting of the seat support and backrest support consist of the various articulated connections between the base frame, seat support and backrest support and are otherwise designed in such a way that the pivoting of the seat support and backrest support relative to the foot support block takes place in a common direction , however, the backrest support passes through a larger swivel angle than the seat support.
  • the Swiveling from the working position downwards / backwards into the rest position by the body weight on the other hand the swiveling upwards / forwards from the rest position by means of an energy store, e.g. B. in the form of a gas spring, which is located below the seat support and is supported between the base block and backrest support.
  • the first articulation axis of the seat support on the base frame block, the second articulation axis of the backrest support on the base frame block and the third articulation axis of the backrest support on the seat support lie approximately in a straight line or at least in the lateral areas of a middle straight line that the circular arcs of the swivel radii of the seat support and backrest support differ only slightly from one another on the third articulation axis, the first articulation of the front seat support area on the base frame block without play, the third articulation of the rear seat support end on the backrest support being designed with play.
  • the seat support and backrest support are relatively complicated and have a large number of individual components, for their assembly a correspondingly large number of screw connections, screw bolts, rivet connections and the like. Like. More is required.
  • a piece of seating furniture with the features of the preamble of claim 1 has also become known, in which a hinge element with a horizontal hinge axis is arranged on the seat support, about which the lower part of the backrest rotates in such a way that the backrest follows can give way in the back and also carries a support arm for the seat plate. This results in a synchronous movement between the seat plate and the backrest.
  • a helical spring provided in the seat support, the tension of which is adjustable, and a gas spring cause an uplifting force of the seat plate and backrest.
  • the present invention has for its object to provide an improved seating with the features of the preamble of claim 1, which is constructed much simpler compared to the prior art and thus less expensive to manufacture, which also has practical uses in its application accommodates much better and in which, above all, the pivoting movements of the seat and backrest for the person sitting on the seating furniture can be realized in a much more physically appropriate manner.
  • the aforementioned object is achieved according to the invention in that the seat support is rigid, ie. H. is pivotally fixed to the base frame and that in each case articulation connections are provided between the seat support and the seat on the one hand and between the seat support and the backrest on the other hand, which are formed by torsionally elastic connecting elements.
  • the torsionally elastic connecting elements consist of torsion spring elements which can be subjected to both bending and torsion and which serve as energy stores.
  • Such torsion spring elements can preferably be designed in the form of bow springs, which are preferably made of spring steel bars (claim 3).
  • the two torsionally elastic connecting elements are impressed with spring preloads which are directed in opposite directions.
  • the different spring preloads that are actually required are selected in particular in accordance with the restoring forces that are required for pivoting from the rest position into the working position of the seating furniture.
  • the one torsionally elastic connecting element which is arranged between the seat support and the seat or the seat frame, has a preload which is set in such a way that corresponds to a seat orientation or seat inclination in which the front seat region is the most downward or the rear one Seating area is raised the highest.
  • the second, torsionally elastic connecting element arranged between the seat support and the backrest or the backrest frame has an oppositely directed spring preload which corresponds to an orientation or inclination of the rear seat area and the backrest and thus a pivoting position, in which the rear seat area is raised the largest and the backrest is pivoted forward the most.
  • At least one of the spring preloads of the two torsionally elastic connecting elements is changeable or adjustable.
  • any pivoting position of the seat and backrest can be adjusted practically continuously, the desired pivoting position achieved in each case being lockable by actuating the gas spring.
  • Claims 7 and 8 deal with preferred configurations and arrangements of the two torsionally elastic connecting elements.
  • claims 9 and 10 relate to a favorable design of the seat support and its arrangement within the framework of the overall construction of the seating.
  • Claims 11 and 12 relate to an advantageous arrangement and design of an adjustment mechanism, with the aid of which the desired spring preload of one of the two torsionally elastic connecting elements can be varied.
  • FIG. 1 shows the side view of an office chair which has a base frame 1 which i. w. consists of a tube, a support column 2, for example designed as a gas spring, is arranged in the interior of the base frame 1 and carries at its upper end a conical pin 3 which is inserted into a corresponding sleeve 4 connected to a seat support 5.
  • a base frame 1 which i. w. consists of a tube
  • a support column 2 for example designed as a gas spring
  • the lower end of the support column 2 of the base frame 1 is mounted on rollers (not shown here).
  • the seat support 5 with the sleeve 4 and with the outer tube of the base frame 1 is fixed and i. w. pivotally connected and welded, for example, to the upper end of the base frame 1.
  • the seat support 5 can be seen in detail from FIG. 2. It consists i. w. from a U-shaped tube 6 with two legs 8, between which a plate 7 is arranged, which is laterally firmly connected to the legs 8 and to the arcuate region of the U-tube 6.
  • the plate 7, as can be seen again from FIG. 1, is firmly connected to the upper ends of the sleeve 4 and the outer tube of the base frame 1, for example by appropriate welded connections, the seat support 5 starting from the base frame 1 having an inclination , which is directed obliquely upwards towards the front end of the seat.
  • the office chair i. w. a seat 43 with a seat frame 28 and a backrest 45 with a backrest frame 36, which has a lower backrest frame part 29, by which a lower region 44 of the backrest 45 is defined.
  • This lower backrest area 44 practically also functions as a rear seating area, while the seat 43 practically forms the front seating area (cf. also FIG. 6).
  • the seat frame 28 has two lateral, iw parallel first and second legs 28a and 28b, which are each connected via first and second swivel joints 30a and 30b to adjoining first and second legs 29a and 29b of the lower backrest frame part 29 of the backrest frame 36, whereby pivoting movements of the seat frame 28 and backrest frame 36 relative to one another are made possible .
  • FIG. 1 The upper, i. w. part of the office chair consisting of the backrest 45 and armrests 38 has not been shown in FIG. 1 for reasons of space. In this regard, reference is made to FIG. 6.
  • the two armrests 38 each extending from the seat frame 28 to the backrest frame 36 are provided with flexible or flexible kinks in order to be able to participate in the relative pivoting movements of the seat frame 28 and the backrest frame 38, the armrests 38 with their respective ends via correspondingly arranged swivel joints 39 are connected to both the seat frame 28 and the backrest frame 36.
  • Such swivel joints 39 are shown schematically in FIGS. 1 and 6, for example, which are the articulated connections of the armrests 38 with the two first and second legs 28a and 28b of the seat frame 28 and with the two first and second legs 29a and 29b of the lower backrest frame part 29 is.
  • the seat support 5 is connected to the legs 28a and 28b of the seat frame 28 via a first bow spring 9. Furthermore, the seat support 5 is via a second bow spring 15 connected to the legs 29a and 29b of the lower backrest frame part 29 of the backrest frame 36.
  • first and second bow springs 9 and 15 each provide torsionally flexible articulated connections between the seat support 5 and the seat frame 28 (and thus the seat 43) on the one hand and between the seat support 5 and the lower backrest frame part 29 (and thus also the backrest 45) on the other hand , wherein these two bow springs 9 and 15, which are preferably made of spring steel and have opposite spring preloads, each represent torsion spring elements which are subjected to both bending and torsion when the seat 43 and backrest 45 are pivoted with the lower backrest region in a synchronously coupled manner, as already explained in more detail at the beginning.
  • the free ends 10 are the Bow spring 9 each bent parallel to the two legs 28a and 28b of the seat frame 28, while on these legs 28a and 28b each have a holding element 11, for. B. in the form of a receptacle, which is used to attach a free end 10 of the bow spring 9.
  • these free ends 10 of the first bow spring 9 each extend from sections 9a and 9b which are bent at right angles to the ends of the seat support 5 pointing towards the front end of the seat.
  • the bow spring 9 continues in a curved middle part 13 pointing towards the rear seat support region, which is, for example, horseshoe-shaped and movable relative to the seat support 5, the rearmost section of the curved middle part 13 being mounted in a sleeve 14 .
  • the plate 7 of the seat support 5 has approximately in its central region an opening 14 ', which is arranged exactly at the level of the rear portion or rear end of the curved central part 13 and an adjustment mechanism to be explained below for adjusting the bias of the first bow spring 9 is.
  • the second bow spring 15 with a bias towards the bias of the first bow spring 9 is designed in such a way that it has two free ends 16, which run parallel to the two legs 29a and 29b of the lower backrest frame part 29 and which are used to make the connections with serve the lower backrest frame part 29 and thus simultaneously with the backrest frame 36.
  • the two first and second legs 29a and 29b of the lower backrest frame part 29 are connected to one another by an intermediate frame part 31, which carries in its center a sleeve-shaped fastening element 32, which supports an upper end 33 'A gas spring 33 is used, as can be seen in particular from FIGS. 1 and 7.
  • this gas spring 33 which can be actuated with the aid of an associated operating lever 35, is supported with its lower end 33 ⁇ on an arm 34 of the base frame 1 directed towards the rear.
  • the gas spring 33 serves to lock the respectively desired pivoting position of the seat 43 and backrest 45 in the pivoting area between the working position and the rest position of the seating furniture.
  • the gas spring 33 as shown in Fig. 7, at its upper, on the intermediate frame part 31 supported end 33 'has a valve 55, in particular in the form of an on / off valve, which with the help of a Operating lever 35 (see FIG. 1) connected lever mechanism 37 can be operated.
  • lever mechanism 37 This extending between the operating lever 35 and the valve 55 lever mechanism 37 is partly arranged on the intermediate frame part 31 and partly in a cavity 31 'of the intermediate frame part 31.
  • the lever mechanism 37 in that section which directly adjoins the operating lever 35 initially consists of a lever arm 37 'pivotally mounted on the intermediate frame part 31'.
  • This pivotable mounting of the lever arm 37 ' is realized in the embodiment according to FIG. 7 in that the lever arm 37' has a curvature, in the area of which a rotating sleeve 46 is attached to the lever arm 37 ', which is rotatably mounted on a journal 47.
  • An actuating element 51 is connected to an end of the push rod 50 opposite the joint 49, through which either the closed position or the open position of the valve 55 of the gas spring 33 is directly achieved, the valve 55 being used for this purpose has a valve lifter 56 with which the actuating element 51 interacts.
  • this actuating element 51 is essentially U-shaped and has an upper, essentially straight first finger 52 and a lower, second finger 53 provided with two bending points, these two bending points being arranged in such a way that an inclined guide section 54 of the second finger 53 of the actuating element 51 results between them.
  • This inclined or oblique guide section 54 is preferably followed by a straight section of the second finger 53, which is located at a short distance from the first finger 52 of the actuating element 51.
  • the second finger 53 of the actuating element 51 is in direct contact with its surface with a head 57 of the valve lifter 56 of the valve 55, in such a way that, as a result of a displacement of the push rod 50 within the cavity 31 'of the intermediate frame part 31, the second finger 53 of the actuating element 51 and in particular its guide section 54 is slipped over the head 57 of the valve tappet 56, whereby this is controlled and thus the valve 55 of the gas spring 33 is actuated.
  • valve tappet 56 slides with its head 57 along the inclined or inclined surface of the guide section 54, as a result of which the valve tappet 56, which is preferably spring-loaded, is either pressed downwards depending on the relative displacement of the push rod 50 inside the intermediate frame part 31, which is a Relaxation of the gas spring 33 via the valve 55 results, or else the valve tappet 56 is allowed to return to occupy the highest position in which the valve 55 is closed.
  • the operating lever 35 and thus also the lever mechanism 37 connected to it within a predetermined pivoting range 58 has a first (lower) position 58 ', in which the valve 55 is closed and thus the currently set pivoting position of the seat 43 and the backrest 45 is locked. This is the locking position of the gas spring 33 shown in FIG. 7.
  • the operating lever 35 and the lever mechanism 37 connected to it have a second (upper) position 58 ⁇ located at the other end of the pivoting range, as is also indicated in FIG. 7, in which second position the valve 55 of the gas spring 33 is opened so that the seat 43 and backrest 45 of the office chair can be pivoted in the manner already explained above either by physical strength or by the energy accumulator (torsion spring elements).
  • a further actuating linkage 21 is arranged essentially in the form of a lever arm, with the actuating linkage 21 being rotatably supported two bearing sleeves 22 are provided, which are welded, for example, to one of the legs 8 of the U-shaped tube 6.
  • This to be operated with the help of a (not shown) handle linkage 21 is used to adjust the height of the support column 2 belonging to the base frame 1 and thus to adjust the height of the entire seating furniture, which, moreover, together with the upper, tubular part of the base frame 1 is rotatable with respect to the Support column 2 is mounted so that the seating shown here in the embodiment has the function of an office swivel chair.
  • the support column 2 is preferably designed as a gas spring.
  • the adjusting mechanism 23 for adjusting the pretension of the first bow spring 9 essentially consists of a housing 26 (cf. FIG. 1) which is fastened on the lower side of the plate 7 facing away from the first bow spring 9, specifically in the opening 14 'In the plate 7.
  • an intermediate housing 27 is also housed with a bolt 25 mounted therein, in such a way that the intermediate housing 27 is displaceable in the axial direction relative to the bolt 25, which through the opening 14th 'Extending end of the intermediate housing 27 cooperates with the sleeve 14, in which the curved middle part 13 of the first bow spring 9 is mounted.
  • this adjustment mechanism 23 has a rotary knob 24, in which the end of the bolt 25 facing away from the central part 13 of the bow spring 9 is fastened.
  • a rotary actuation of the rotary knob 24 causes a relative displacement of the intermediate housing 27 relative to the bolt 25 and thus a change in the position of the curved middle part 13 of the first bow spring 9 either upwards or downwards, which is equivalent to an adjustment of the spring preload of the first bow spring 9, which is directed in the opposite direction to the spring preload of the second bow spring 15.
  • the adjustment mechanism 23 is otherwise arranged in such a way that its axis is aligned obliquely to the axis of the base frame 1.
  • Fig. 3 is also indicated that the seat frame 28 is covered with a perforated plate 42, which in reality fills the entire space between the two seat frame legs 28a and 28b, a corresponding perforated sheet covering can also be provided in the region of the lower backrest frame part 29 , to the extent that a seat load also occurs in this lower backrest area 44.
  • a perforated plate 42 which in reality fills the entire space between the two seat frame legs 28a and 28b
  • a corresponding perforated sheet covering can also be provided in the region of the lower backrest frame part 29 , to the extent that a seat load also occurs in this lower backrest area 44.
  • Such covering with perforated plates 42 has the advantage over the known shell constructions that very good active ventilation of the entire seat surface is made possible.
  • the two extreme pivoting positions can be seen from FIG. 1, namely the working position 40, in which the rear region of the seat surface, ie in this case the lower region 44 of the backrest 45, is raised the greatest upwards, while the backrest 45 is pivoted forward most.
  • the broken position curve 41 indicates the rest position in which lower region 44 of the backrest 45 (and thus practically the rear seat surface) is greatest pressed down and the backrest 45 is pivoted the farthest back.
  • torsionally flexible articulation connections in particular in the form of torsion spring elements as energy stores, by means of which a separate articulation connection between the seat and seat support on the one hand and the backrest and seat support on the other hand is made possible, while the seat support itself is essentially pivotably immovable on the base frame the seat is attached.
  • the inventive design of the seating furniture achieves both an improved pivotability of the seat and backrest into the working position, with additional seat elasticity being achieved, in particular also flexibility in the lateral seat areas, ie. H. depending on the weight shift of the person sitting on the seating furniture to the right or left.

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  • Health & Medical Sciences (AREA)
  • Dentistry (AREA)
  • General Health & Medical Sciences (AREA)
  • Chairs Characterized By Structure (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)

Claims (19)

  1. Siège de mobilier se présentant sous la forme d'une chaise ou d'un fauteuil, notamment d'une chaise ou fauteuil de bureau, comprenant :
    - d'une part, un piétement (1),
    sur lequel un support de siège (5) est monté,
    - une assise (43) et un dossier (45) étant reliés au support de siège (5),
    - et, d'autre part, des dispositifs permettant un basculement, accouplé de manière synchrone, de l'assise (43) et du dossier (45) vis-à-vis du piétement (1) dans une direction commune pour l'un et l'autre, mais avec des domaines angulaires de basculement différents,
    - le basculement d'une position de travail, dans laquelle la partie arrière de l'assise est relevée au maximum et le dossier est basculé au maximum vers l'avant, à une position de repos, dans laquelle la partie arrière de l'assise est abaissée au maximum et le dossier est basculé au maximum vers l'arrière, s'effectuant sous l'effet du poids du corps d'une personne assise sur le siège de mobilier, tandis qu'inversement, le basculement de la position de repos vers le haut/l'avant à la position de travail s'effectue au moyen d'un accumulateur de force et
    - le support de siège (5) étant fixé rigidement, c'est-à-dire sans pouvoir pratiquement être déplacé en basculement, sur le piétement (1),
       caractérisé en ce que :
       entre le support de siège (5) et l'assise (43), d'une part, et entre le support de siège (5) et le dossier (45), d'autre part, il est prévu des liaisons articulées flexibles respectives qui sont constituées par des éléments de liaison (9, 15), à élasticité de torsion, se présentant sous la forme d'éléments de ressort de torsion.
  2. Siège de mobilier suivant la revendication 1, caractérisé en ce que les éléments de liaison (9, 15) à élasticité de torsion et constitués d'éléments de ressort de torsion servent d'accumulateurs de force.
  3. Siège de mobilier suivant l'une des revendications 1 et 2, caractérisé en ce que les éléments de liaison à élasticité de torsion ou éléments de ressort de torsion (9, 15) sont réalisés essentiellement sous la forme de ressorts en étrier qui sont de préférence formés à partir de tiges d'acier à ressort.
  4. Siège de mobilier suivant l'une des revendications 1 à 3, caractérisé en ce que l'élément de liaison à élasticité de torsion (premier ressort en étrier 9) qui est disposé entre le support de siège (5) et l'assise (43) présente une précontrainte élastique dans un sens opposé à celui de la précontrainte élastique de l'élément de liaison à élasticité de torsion (second ressort en étrier 15) qui est disposé entre le support de siège (5) et le dossier (45).
  5. Siège de mobilier suivant la revendication 4, caractérisé en ce que la précontrainte élastique d'au moins l'un des deux éléments de liaison (9, 15) à élasticité de torsion est réglable.
  6. Siège de mobilier suivant l'une des revendications précédentes, caractérisé en ce qu'il est prévu un châssis d'assise (28) pour l'assise (43) et un châssis de dossier (36), comportant une partie inférieure (29), pour le dossier (36) et en ce que le châssis d'assise (28) est relié par ses deux branches (28a, 28b) au support de siège (5) par l'intermédiaire du premier ressort en étrier (9), tandis que la partie inférieure (29) du châssis de dossier est reliée par ses deux branches (29a, 29b) au support de siège (5) par l'intermédiaire du second ressort en étrier (15).
  7. Siège de mobilier suivant l'une des revendications précédentes, caractérisé en ce que le premier élément de ressort de torsion ou premier ressort en étrier (9) comporte deux extrémités libres (10) qui sont coudées chacune d'une manière pratiquement parallèle aux deux branches (28a, 28b) et sont fixées dans des éléments de support (11) montés sur les branches (28a, 28b), tandis que des tronçons (9a, 9b) du premier ressort en étrier (9), coudés d'une manière perpendiculaire, s'étendent respectivement desdites extrémités libres (10) au support de siège (5) et sont montés mobiles en rotation dans des coussinets de rotation montés sur le support de siège (5), une partie centrale courbe (13) du premier ressort en étrier (9), prolongeant les deux tronçons coudés (9a, 9b) et dirigée vers la partie arrière du support de siège (5), étant mobile vis-à-vis de ce support de siège.
  8. Siège de mobilier suivant l'une des revendications 1 à 7, caractérisé en ce que le second élément de ressort de torsion ou second ressort en étrier (15) est agencé de façon à comporter deux extrémités libres (16) qui s'étendent respectivement d'une manière parallèle aux deux branches (29a, 29b) de la partie inférieure (29) du châssis de dossier et qui sont fixées dans des éléments de support (17) montés sur les deux branches (29a, 29b), tandis que des tronçons inclinés (19), prolongeant ces deux extrémités libres (16) et pliés en direction du support de siège (5), se raccordent à un tronçon central rectiligne (20) du second ressort en étrier (15) qui réunit ces tronçons inclinés, le tronçon central (20) étant adjacent à la partie centrale courbe (13) du premier ressort en étrier (9) et étant monté mobile en rotation dans deux coussinets de rotation (18) montés sur le support de siège (5).
  9. Siège de mobilier suivant l'une des revendications précédentes, caractérisé en ce que le support de siège (5) est constitué pour l'essentiel d'un tube (6) plié en U et d'une plaque (7) remplissant l'espace libre en U délimité par la paroi extérieure de ce tube (6) en U, les deux branches (8) du tube (6) en U étant orientées vers l'extrémité avant de l'assise et portant chacune à son extrémité un coussinet de rotation (12) destiné au premier ressort en étrier (9), tandis qu'il est disposé dans la partie arrière de chacune des deux branches parallèles (8) un coussinet de rotation (18) destiné au second ressort en étrier (15).
  10. Siège de mobilier suivant la revendication 9, caractérisé en ce que le support de siège (5) et sa plaque (7) s'étendent en étant inclinés vers le haut, du piétement (1) vers l'extrémité avant de l'assise.
  11. Siège de mobilier suivant la revendication 9 ou 10, caractérisé en ce que la plaque (7) du support de siège (5) comporte, approximativement dans sa partie centrale, une ouverture (14') qui est située en regard de l'extrémité arrière de la partie centrale courbe (13) du premier ressort en étrier (9) et qui est associée à un mécanisme permettant de régler la précontrainte du premier ressort en étrier (9), lequel mécanisme agit sur le tronçon, de la partie centrale courbe (13) du premier ressort en étrier (9), qui est situé au-dessus de l'ouverture (14') et est monté dans un coussinet (14).
  12. Siège de mobilier suivant la revendication 11, caractérisé en ce que le mécanisme de réglage (23) est essentiellement constitué d'un boîtier (26) qui est fixé sur la face inférieure de la plaque (7) opposée au ressort en étrier (9) et dans lequel sont montés des éléments (25, 27) agencés de façon à pouvoir se déplacer en translation axiale l'un vis-à-vis de l'autre, ce mécanisme de réglage (23) comprenant en outre un bouton rotatif (24) dont la manoeuvre provoque, par l'intermédiaire des éléments (25, 27), une modification de position de la partie centrale courbe (13) du premier ressort en étrier (9) vers le haut ou vers le bas et donc un réglage de la précontrainte de ce ressort, précontrainte dont le sens est opposé à celui de la précontrainte du second ressort en étrier (15).
  13. Siège de mobilier suivant l'une des revendications précédentes, caractérisé en ce que, sur la face inférieure, de la plaque (7) du support de siège (5), qui est opposée aux ressorts en étrier (9, 15), il est en outre disposé une tringle de manoeuvre (21) qui est montée dans des coussinets (22) et sert au réglage de la hauteur de la colonne de support (2), par exemple d'un amortisseur pneumatique.
  14. Siège de mobilier suivant l'une des revendications précédentes, caractérisé en ce qu'un amortisseur pneumatique (33), accouplé à un levier de manoeuvre (35), est prévu pour verrouiller la position de basculement de l'assise (43) et du dossier (45) qui est chaque fois voulue, dans le domaine de basculement compris entre la position de travail et la position de repos, cet amortisseur pneumatique (33) prenant appui par son extrémité supérieure (33') sur une partie intermédiaire de châssis (31) qui réunit entre elles les deux branches (29a, 29b) de la partie inférieure (29) du châssis de dossier, tandis que l'amortisseur pneumatique (33) prend appui par son extrémité inférieure (33") sur le piétement (1).
  15. Siège de mobilier suivant la revendication 14, caractérisé en ce que, dans la zone de son extrémité supérieure (33') prenant appui sur la partie intermédiaire de châssis (31), l'amortisseur pneumatique (33) comporte une soupape (55) qui est agencée de façon à pouvoir être actionnée à l'aide d'un mécanisme à levier (37) relié au levier de manoeuvre (35), de façon telle que, dans une première position du lever de manoeuvre (35), la soupape (55) est fermée et la position momentanée de basculement, chaque fois réglée, de l'assise (43) et du dossier (45) est donc verrouillée et que, dans une seconde position du lever de manoeuvre (35), la soupape (55) est ouverte et la possibilité de basculement de l'assise (43) et du dossier (45) est fournie soit par une force appliquée par le corps, soit à l'aide de l'accumulateur de force.
  16. Siège de mobilier suivant la revendication 15, caractérisé en ce que le mécanisme à levier (37) situé entre le levier de manoeuvre (35) et la soupape (55) est disposé en partie sur la partie intermédiaire de châssis (31) et en partie dans une cavité (31') de cette partie intermédiaire de châssis (31) et en ce qu'il est essentiellement constitué d'un bras de levier (37'), monté basculant sur la partie intermédiaire de châssis (31), et d'une tige de poussée (50), disposée dans la cavité (31') de la partie intermédiaire de châssis (31), dont une extrémité est reliée au bras de levier (37') par une articulation (49) et sur l'autre extrémité de laquelle est disposé un élément d'actionnement (51) qui coopère avec un poussoir (56) de la soupape (55).
  17. Siège de mobilier suivant la revendication 16, caractérisé en ce que l'élément d'actionnement (51) relié à la tige de poussée (50) est essentiellement en U et comporte un premier doigt supérieur (52) à peu près rectiligne et un second doigt inférieur (53) comportant des emplacements de flexion, ces emplacements de flexion du second doigt (53) étant situés de façon telle qu'entre les emplacements de flexion, il est disposé un tronçon incliné de guidage (54) qui coopère avec une tête (57) du poussoir de soupape (56) et à l'aide duquel, sous l'effet d'un déplacement de la tige de poussée (50) avec l'élément d'actionnement (51) à l'intérieur de la partie intermédiaire de châssis (31), le poussoir de soupape (56) est commandé, de sorte que la soupape (55) est actionnée.
  18. Siège de mobilier suivant l'une des revendications précédentes, caractérisé en ce qu'il est prévu deux accoudoirs (38) qui s'étendent chacun du châssis d'assise (28) au châssis de dossier (36), les extrémités respectives des accoudoirs (38) étant reliées au châssis d'assise et au châssis de dossier par des articulations pivotantes correspondantes (par exemple 39).
  19. Siège de mobilier suivant l'une des revendications précédentes, caractérisé en ce que des tôles perforées (42) couvrent respectivement les étendues intérieures libres délimitées par le châssis d'assise (28) et au moins par la partie inférieure (29) du châssis de dossier.
EP88120948A 1988-04-12 1988-12-15 Meuble servant de siège Expired - Lifetime EP0341344B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE3812117 1988-04-12
DE3812117 1988-04-12
CA000613469A CA1316091C (fr) 1988-04-12 1989-09-27 Fauteuil de bureau

Publications (3)

Publication Number Publication Date
EP0341344A2 EP0341344A2 (fr) 1989-11-15
EP0341344A3 EP0341344A3 (en) 1990-03-28
EP0341344B1 true EP0341344B1 (fr) 1993-03-24

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Application Number Title Priority Date Filing Date
EP88120948A Expired - Lifetime EP0341344B1 (fr) 1988-04-12 1988-12-15 Meuble servant de siège

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Country Link
EP (1) EP0341344B1 (fr)
CA (1) CA1316091C (fr)
DE (1) DE3879679D1 (fr)
ES (1) ES2039580T3 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IE66531B1 (en) * 1991-05-21 1996-01-24 Ashfield Eng Co Wexford Ltd A chair tilting mechanism
CA2204579C (fr) * 1997-05-06 2000-10-17 Broda Enterprises Inc. Chaise inclinable
CH704814A2 (de) * 2011-04-12 2012-10-15 Vitra Patente Ag Mechanik für einen Stuhl mit synchron verstellbarer Ausrichtung von Rückenlehne und Sitz.
EP3192398B1 (fr) * 2016-01-15 2019-12-11 himolla Polstermöbel GmbH Couchette/siège
CH715343A1 (de) * 2018-09-18 2020-03-31 Krob Andreas Drehstuhl.

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3545810A (en) * 1968-09-23 1970-12-08 Keystone Consolidated Ind Inc Locking means for chair controls
IT1161498B (it) * 1983-07-12 1987-03-18 Castelli Spa Sedia
DE3608718A1 (de) * 1986-03-15 1987-09-17 Drabert Soehne Sitzmoebel

Also Published As

Publication number Publication date
EP0341344A3 (en) 1990-03-28
EP0341344A2 (fr) 1989-11-15
ES2039580T3 (es) 1993-10-01
CA1316091C (fr) 1993-04-13
DE3879679D1 (de) 1993-04-29

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