EP2434929B1 - Verfahren zum kippen der rückenlehne eines sitzes - Google Patents

Verfahren zum kippen der rückenlehne eines sitzes Download PDF

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Publication number
EP2434929B1
EP2434929B1 EP09784395.7A EP09784395A EP2434929B1 EP 2434929 B1 EP2434929 B1 EP 2434929B1 EP 09784395 A EP09784395 A EP 09784395A EP 2434929 B1 EP2434929 B1 EP 2434929B1
Authority
EP
European Patent Office
Prior art keywords
seat
bars
tilting
attached
frame
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.)
Active
Application number
EP09784395.7A
Other languages
English (en)
French (fr)
Other versions
EP2434929A1 (de
Inventor
Etienne Girardin
Jean Antoine Krommenacker
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 SA
Original Assignee
Steelcase SA
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Filing date
Publication date
Application filed by Steelcase SA filed Critical Steelcase SA
Publication of EP2434929A1 publication Critical patent/EP2434929A1/de
Application granted granted Critical
Publication of EP2434929B1 publication Critical patent/EP2434929B1/de
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Anticipated expiration legal-status Critical

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Supports for the head or the back
    • A47C7/40—Supports for the head or the back for the back
    • A47C7/48—Supports for the head or the back for the back of freely-rotatable type

Definitions

  • the present invention relates to a mechanism for controlled tilting of a seat back relative to a frame of said seat.
  • the control constraints of the tilting are a bit peculiar in the context of the present invention, because the aforementioned framework defines in fact a horizontal axis of rotation around which the backrest can rotate, hence a management of the comfort of seated by a mechanism confined to said backrest and not, as is often the case in seatbacks, for a tilting mechanism which originates at the level of the support of the seat and whose tension is adjustable to level, combined with a simple pivoting of the backrest.
  • the amplitude of the tilting is conventionally defined between a first stable angular position of repose, that which takes the file for example in the absence of user, and a second maximum tilting angular position which is the extreme inclined position that can take the folder when the user rejects his bust backwards.
  • the return means are then interposed between said frame and the backrest, to recall the backrest in its first stable position relative to the frame, that is to say to the rest of the seat, after it has been subject to a switchover.
  • the return means consist, at each pivot, of at least one elastic flexible bar placed on each side of a horizontal median plane comprising the pivot axis, a first end of each bar being fixed to the backrest, the second end being free and in contact with a stop of the pivot.
  • the choice of elongate bending springs, arranged above and below the tilting axis, results in particular from the shape of the backrest, having a frame or periphery such that the lateral sides are V-shaped, hence the possibility of placing in each branch of the V at least one flexible bar.
  • the backrest can indeed be in various configurations, for example a plastic shell covered with a quilting, or a peripheral frame between the sides of which a fabric is stretched.
  • the pins integral with the frame are each provided with a plate which exceeds two pins adapted to cooperate with the free ends of the spring bars, which are arranged in a housing having a side wall is provided to limit their elastic deflection.
  • said flexible bars are doubled on both sides of the median plane, and consist of homologous parallelepiped bars fixed to the backrest. There is therefore, on either side of the axis, a pair of bars juxtaposed in width, which increases the response flexibility of the folder, varying differentially the tension of the folder according to the applied force.
  • the flexible bars are fixed in pairs to the hull or to the backrest frame, arranged in lateral housings of which a wall serves as a stop during the deflection of the bars. It has been mentioned before the stops placed on the plate equipping the pivots, which are therefore connected to the frame of the seat, with which cooperate the return means. These are therefore subject to other stops to limit the tilt angle, which are this time provided in the folder.
  • the flexible bars can of course be individually fixed to the frame or to the hull.
  • said flexible bars are first attached to an insert having housings for the bars, a wall serves as a stop during the deflection of the bars, said insert then being secured to the frame or to the shell of the backrest.
  • these inserts are made of cast aluminum.
  • each flexible bar in contact with the abutment of the pivot comprises a plastic cap, so as not to generate noise and to reduce the wear that can come from the friction of the bar against the pin protruding from the pivot plate.
  • This cap is for example tight grip at the end of these bars.
  • a polyoxymethylene ring is preferably interposed between each pivot and the frame or the shell of the backrest.
  • the assembly of the assembly that is to say the fastening of the backrest to the frame forming the main structure of the seat can be made by bolting the pivots to ends arranged laterally to the backrest and intended to be attached to the frame of the seat.
  • the seat (1) described by way of example conventionally comprises a seat (2) and a backrest (3) with a plastic shell on which is fixed a padding, said backrest (3) being pivotally mounted relative to a frame (4).
  • a frame (4) comprising in this case in particular the front legs (5, 5 ') and the armrests (6, 6') made on each side of the seat (1) in the same tubular structure of which the rear upper end ends at the pivots of the backrest (3).
  • a tip (7) for example made of aluminum having a cylindrical end provided with reliefs is plugged tight into the tubes of the armrests (6, 6 ') at their free end.
  • a bore (9) opening on the backrest (3) is provided for housing a pivot (10) having an end plate (11) provided with pins (12, 12 ').
  • the assembly is mounted through an orifice (13) made laterally in the shell (14) of the backrest (3) constituting a free connection in rotation.
  • a rotationally improving guide washer (15) is placed between the pivot (11) and the wall of the orifice (13), mounted in the latter where it is locked in rotation by means of a lug.
  • the pivot (10) is fixed to the end piece (7) by means of a screw (19) and the insert (18) is secured to the shell (14) by screws (not shown) whose seats (19) protrude from the branches of the insert (18).
  • the backrest (3) Only one of the lateral structures of the backrest (3) for fixing / controlling the pivoting appears in figure 2 the other being strictly symmetrical.
  • the backrest comprises a solid shell (14), coated at the end of assembly by a ring (20) which covers the lateral mechanical pivoting connections.
  • the file may also include a padding, according to a variant that does not change the technical structure described above.
  • the bars (16, 16 ') are actually covered by the insert or cage (18), since they are pre-assembled therein, as shown in FIG. figure 4 .
  • the insert (18) is not represented on this figure 3 .
  • Said insert (18) is actually housed in recesses (23, 23 ') (see FIG. figure 2 ) formed in the shell (14) for housing its lateral branches, which are configured to adapt to the particular shape of the backrest, and therefore the hull (14).
  • the ring (20) when installed with metal clips (24), covers all of the lateral tilt control mechanisms according to the present invention.
  • the figure 4 shows the fixation of flexible spring bars (16, 16 '), for example of square section to 5 mm side, in the insert (18).
  • the assembly of inserts (18) is made after that of the pivots (10), which itself follows that of the rings (15) in the shell (14) of the folder (3).
  • the positioning of the pivot (10) in the endpiece (7) is effected by means of a rotational locking connection in the form of a hexagon nut (25), before tightening by screw (26) in said mouthpiece (7).
  • the solid shell (14) can be replaced by a peripheral frame between the sides of which is stretched a fabric (the ring (20) is then replaced by side covers), or the frame (4) can be of different form without significantly changing the structure of the invention.

Landscapes

  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)
  • Chairs Characterized By Structure (AREA)
  • Seats For Vehicles (AREA)

Claims (10)

  1. Mechanismus zum kontrollierten Kippen der Rückenlehne (3) eines Sitzes (1) im Verhältnis zu einem Gestell (4) des Sitzes (1), der eine horizontale Kippachse definiert, wobei die Amplitude des Kippens zwischen einer ersten stabilen Ruhe-Winkelposition und einer zweiten maximalen Kipp-Winkelposition definiert ist, wobei sich Rückholmittel (16, 16') zwischen dem Gestell (4) und der Rückenlehne (3) befinden, um die Rückenlehne (3) im Fall des Kippens in ihre erste stabile Position zurückzuholen, wobei die Rückholmittel (16, 16') in der Rückenlehne (3) platziert sind und eine Rückholkraft im Verhältnis zur Kippachse ausüben, die durch zwei mit dem Gestell (4) verbundene Drehzapfen (10) definiert ist, um die die Rückenlehne (3) seitlich angelenkt ist, dadurch gekennzeichnet, dass die Rückholmittel auf Ebene jedes Drehzapfens (10) von mindestens einer elastischen flexiblen Stange (16, 16') gebildet werden, die an jeder Seite einer horizontalen mittleren Ebene, die die Kippachse umfasst, angelenkt sind, wobei ein erstes Ende jeder Stange (16, 16') an der Rückenlehne (3) befestigt ist, wobei das zweite Ende frei und im Kontakt mit einem Anschlag (12, 12') des Drehzapfens (10) ist.
  2. Mechanismus zum kontrollierten Kippen der Rückenlehne (3) eines Sitzes (1) nach vorangehendem Anspruch, dadurch gekennzeichnet, dass die mit dem Gestell (4) verbundene Drehzapfen (10) jeweils mit einem Plättchen (11) ausgestattet sind, aus dem zwei Stifte (12, 12') hinausragen, die imstande sind, mit den freien Enden der Federstangen (16, 16') zusammenzuarbeiten, die in einer Aufnahme angeordnet sind, von der eine Seitenwand (21 , 21') zur Begrenzung ihres elastischen Ausschlags vorgesehen ist.
  3. Mechanismus zum kontrollierten Kippen der Rückenlehne (3) eines Sitzes (1) nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass die flexiblen Stangen (16, 16') an beiden Seiten der mittleren Ebene doppelt sind und von homologen parallelepipedischen Stangen gebildet werden, die an der Rückenlehne (3) befestigt sind.
  4. Mechanismus zum kontrollierten Kippen der Rückenlehne (3) eines Sitzes (1) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die flexiblen Stangen (16, 16') paarig am Körper (14) oder am Rahmen der Rückenlehne (3) befestigt sind, angeordnet in seitlichen Aufnahmen, von denen eine Wand beim Ausschlag der Stangen (16, 16') als Anschlag dient.
  5. Mechanismus zum kontrollierten Kippen der Rückenlehne (3) eines Sitzes (1) nach vorangehendem Anspruch, dadurch gekennzeichnet, dass die Enden der flexiblen Stangen (16, 16'), die am Rahmen oder am Körper (14) zu befestigen sind, mit einem Ansatz verbunden sind, der selbst am Rahmen oder am Körper (14) befestigt ist.
  6. Mechanismus zum kontrollierten Kippen der Rückenlehne (3) eines Sitzes (1) nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die flexiblen Stangen (16, 16') an einem Einsatz (18) befestigt sind, der Aufnahmen für die Stangen (16, 16') aufweist, von dem eine Wand (21, 21') beim Ausschlag der Stangen (16, 16') als Anschlag dient, wobei der Einsatz (18) mit dem Rahmen oder dem Körper (14) der Rückenlehne (3) verbunden ist.
  7. Mechanismus zum kontrollierten Kippen der Rückenlehne (3) eines Sitzes (1) nach vorangehendem Anspruch, dadurch gekennzeichnet, dass die Einsätze (18) aus geformtem Aluminium sind.
  8. Mechanismus zum kontrollierten Kippen der Rückenlehne (3) eines Sitzes (1) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass mindestens jede flexible Stange (16, 16') im Kontakt mit dem Anschlag (12, 12') des Drehzapfens (10) eine Kappe (17, 17') aus Kunststoff aufweist.
  9. Mechanismus zum kontrollierten Kippen der Rückenlehne (3) eines Sitzes (1) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass sich zwischen jedem Drehzapfen (10) und dem Rahmen oder dem Körper (14) der Rückenlehne (3) ein Ring (15) aus Polyoxymethylen befindet.
  10. Mechanismus zum kontrollierten Kippen der Rückenlehne (3) eines Sitzes (1) nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Drehzapfen (10) mit Ansätzen (7) verschraubt sind, die seitlich an der Rückenlehne (3) angeordnet und zur Befestigung am Gestell (4) des Sitzes (1) vorgesehen sind.
EP09784395.7A 2009-05-27 2009-05-27 Verfahren zum kippen der rückenlehne eines sitzes Active EP2434929B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/FR2009/050988 WO2010136660A1 (fr) 2009-05-27 2009-05-27 Mécanisme de basculement du dossier d'un siège

Publications (2)

Publication Number Publication Date
EP2434929A1 EP2434929A1 (de) 2012-04-04
EP2434929B1 true EP2434929B1 (de) 2014-12-10

Family

ID=41510781

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09784395.7A Active EP2434929B1 (de) 2009-05-27 2009-05-27 Verfahren zum kippen der rückenlehne eines sitzes

Country Status (3)

Country Link
EP (1) EP2434929B1 (de)
ES (1) ES2531969T3 (de)
WO (1) WO2010136660A1 (de)

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6974188B2 (en) * 2003-08-13 2005-12-13 Cosco Management, Inc. Chair with pivotable chair back
JP2007125221A (ja) * 2005-11-04 2007-05-24 Okamura Corp 椅子の背凭れ装置
US7837265B2 (en) * 2006-03-24 2010-11-23 Hni Corporation Reclining chair with enhanced adjustability

Also Published As

Publication number Publication date
EP2434929A1 (de) 2012-04-04
WO2010136660A1 (fr) 2010-12-02
ES2531969T3 (es) 2015-03-23

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