WO1991001663A1 - Support pour l'assise de fauteuils ou similaires a inclinaison automatique - Google Patents

Support pour l'assise de fauteuils ou similaires a inclinaison automatique Download PDF

Info

Publication number
WO1991001663A1
WO1991001663A1 PCT/EP1990/001218 EP9001218W WO9101663A1 WO 1991001663 A1 WO1991001663 A1 WO 1991001663A1 EP 9001218 W EP9001218 W EP 9001218W WO 9101663 A1 WO9101663 A1 WO 9101663A1
Authority
WO
WIPO (PCT)
Prior art keywords
seat
bush
sleeve
elastically
coil 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.)
Ceased
Application number
PCT/EP1990/001218
Other languages
English (en)
Inventor
Massimo Bonetti
Guiseppe Manente
Abramo Mion
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.)
KAIROS Srl
Original Assignee
KAIROS Srl
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 KAIROS Srl filed Critical KAIROS Srl
Publication of WO1991001663A1 publication Critical patent/WO1991001663A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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

  • This invention relates to a support device for the seat of armchairs or the like with automatically controlled inclination.
  • Armchairs, chairs and the like having their seat inclinable longitudinally and/or laterally in response to the loading applied by the seated person. The seat then returns elastically into its correct rest position when the loading ceases.
  • This inclination occurs generally by the compliance of an elastic member interposed between the seat and the structure by which it rests on the floor, this compliance being of proportional type in the sense that the greater the seat is displaced from its rest position the greater the reaction of the elastic member against it, so that the system is self-limiting at the ends of this inclination.
  • An object of the invention is to provide an armchair which allows the seat to incline in every direction with a degree of compliance which is independent of the weight of the seated person.
  • a further object of the invention is to provide an armchair in which the device which allows this controlled inclination is independent of the form of the seat.
  • a further object of the invention is to provide an armchair in which the device which allows this controlled inclination is of simple construction and is operationally reliable.
  • a further object of the invention is to provide an armchair with the facility for differentiating the degree of compliance in the two perpendicular directions, in particular making it greater in the longitudinal direction and lesser in the transverse direction.
  • a further object of the invention is to provide an armchair in which seat inclination can be temporarily prevented for specific purpose.
  • a support device for the seat of an armchair or the like with automatically controlled inclination comprising a seat, a structure for its resting on the floor, and a member interposed between said seat and said structure to allow said seat to incline to said structure, characterised in that said member comprises an element for elastically counteracting the weight of a seated person and arranged to vary the distance between the two, and an elastically flexible element of essentially vertical extension, the active length of which is related to the distance between said seat and said structure.
  • Figure 1 is a vertical schematic section through a device according to the invention in its unloaded state
  • Figure 2 is a partial view thereof corresponding to Figure 1 but in its loaded state
  • Figure 3 is a partial side view thereof.
  • Figure 4 is a partial lower plan view thereof.
  • the seat support device according to the invention is interposed between the seat, which in this example is shown as a plate 1 to be applied to the lower surface of the seat, and the column 2 of the structure by which it rests on the floor.
  • the column 2 comprises a conventional pneumatic cylinder which enables the height of the seat above the floor to be adjusted, for example by a gas spring.
  • a bush 4 On the upper emerging end of the rod 3 there is applied a bush 4 upperly comprising a cylindrical axial cavity 5 which faces upwards to face a downwardly facing cylindrical axial cavity
  • the rod 3 is internally hollow and is closed upperly by a valve, the stem 8 of which emerges axial ly upwards and is faced by a ball 9 fixed to the end of a cable 10 extending within a flexible sheath 11 and traversing at one end end a bush 12 which is elastically urged against the stem 8 by a spring 13 which operates by expansion.
  • a conventional traction connection at the opposite end of the cable 10 opposes the elastic reaction of the permanently compressed spring 13 to prevent the ball 9 activating the stem 8.
  • a coil spring 14 which operates by compression, its purpose being to elastically oppose the weight of a person seated on the seat 1, as will be apparent hereinafter.
  • the outer surface of the bush 4 is cylindrical and on it there can slide a bush 15, which encounters an upper end-oftravel stop in the form of a circumferential step 16 provided at the upper end of the bush 4.
  • the coil spring 17 is of circular section and is externally surrounded by a sleeve 20 which is lowerly cylindrical and upperly frusto-conical with its flare facing upwards. It adheres by means of its lower cylindrical portion to the lower portion of the outer coil spring 17 but is upperly spaced apart therefrom, and is provided with a circumferential ledge against which the lower edge of the bush 15 rests.
  • the sleeve 20 is provided upperly, in correspondence with its free upper edge, with a pair of lateral slots 22 consisting of a vertical portion and a horizontal portion symmetrical about the sleeve axis. These two slots are traversed by a lever 23 pivoted to the plate 1 about the axis of the bush 7 and extending parallel to the plate 1 in the form of a handgrip 24.
  • the height of the seat is adjusted in the conventional manner by the person using it, by slackening the traction on the cable 10 to enable the spring 13 to urge the ball 9 against the stem 8 and thus connect the interior of the column 2 to the outside.
  • This free portion which has the length 1 in Figures 1 and 2, represents the active portion which can undergo flexure following loading applied to the seat with which the plate 1 is rigid, to thus enable said seat to incline in accordance with the loading received.
  • the flexural compliance of the seat can adapt with good accuracy to the weight of the person.
  • the sleeve 20, and specifically its upper flared portion, can be used as a limit stop for the bending of the spring 17 and thus for the seat inclination.
  • the spring 17 is of elliptical instead of circular cross-section, with its major axis in the longitudinal direction.
  • the seat 1 has greater compliance in the longitudinal direction than in the transverse direction.
  • the desired degree of compliance in the two perpendicular directions can be obtained by suitably sizing said spring 17.
  • the sleeve 20 is also of elliptical crosssection, and as in the previous case can act as a limit stop for the inclination of the seat 1.
  • control device of the invention has considerable advantages, and in particular:

Landscapes

  • Seats For Vehicles (AREA)

Abstract

Un support pour l'assise d'un fauteuil ou similaires à inclinaison automatique comprend une assise, une structure permettant son appui au sol, et un dispositif intercalé entre ladite assise et ladite structure permettant l'inclinaison de ladite assise par rapport à ladite structure, caractérisé en ce que ledit dispositif comprend un élément (14) servant à fournir une action élastique de compensation du poids de la personne assise et disposé de manière à modifier la distance entre les deux, et un élément flexible élastique (17) à extension essentiellement verticale, dont la longueur active est fonction de la distance entre ladite assise (1) et ladite structure (2).
PCT/EP1990/001218 1989-08-04 1990-07-25 Support pour l'assise de fauteuils ou similaires a inclinaison automatique Ceased WO1991001663A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT84147A/89 1989-08-04
IT8984147A IT1234373B (it) 1989-08-04 1989-08-04 Dispositivo di supporto del sedile di poltroncine e simili ad inclinazione autocontrollata.

Publications (1)

Publication Number Publication Date
WO1991001663A1 true WO1991001663A1 (fr) 1991-02-21

Family

ID=11324780

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1990/001218 Ceased WO1991001663A1 (fr) 1989-08-04 1990-07-25 Support pour l'assise de fauteuils ou similaires a inclinaison automatique

Country Status (2)

Country Link
IT (1) IT1234373B (fr)
WO (1) WO1991001663A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT398160B (de) * 1992-06-10 1994-10-25 Froschauer Hedwig Arbeitssessel, insbesondere bürosessel
WO1995020895A3 (fr) * 1993-12-02 1995-11-02 Hansen Fritz As Siege de bureau
EP3139795A1 (fr) * 2014-05-07 2017-03-15 Ubomír Blasko Chaise avec mécanisme d'équilibrage

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3417956A (en) * 1966-08-02 1968-12-24 Art Metal Knoll Corp Chair control
FR2179786A1 (fr) * 1972-04-12 1973-11-23 Staal & Stil As
DE2406338A1 (de) * 1974-02-11 1975-08-14 Artur Wahle Kg Stahlrohrmoebel Stahlrohrhocker zur verwendung als bueromoebel, kuechenmoebel od. dgl.
EP0149041A2 (fr) * 1984-01-11 1985-07-24 Herman Miller, Inc. Mécanisme pour chaise inclinable

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3417956A (en) * 1966-08-02 1968-12-24 Art Metal Knoll Corp Chair control
FR2179786A1 (fr) * 1972-04-12 1973-11-23 Staal & Stil As
DE2406338A1 (de) * 1974-02-11 1975-08-14 Artur Wahle Kg Stahlrohrmoebel Stahlrohrhocker zur verwendung als bueromoebel, kuechenmoebel od. dgl.
EP0149041A2 (fr) * 1984-01-11 1985-07-24 Herman Miller, Inc. Mécanisme pour chaise inclinable

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT398160B (de) * 1992-06-10 1994-10-25 Froschauer Hedwig Arbeitssessel, insbesondere bürosessel
WO1995020895A3 (fr) * 1993-12-02 1995-11-02 Hansen Fritz As Siege de bureau
WO1996029912A1 (fr) * 1993-12-02 1996-10-03 Fritz Hansen A/S Chaise de bureau
EP3139795A1 (fr) * 2014-05-07 2017-03-15 Ubomír Blasko Chaise avec mécanisme d'équilibrage

Also Published As

Publication number Publication date
IT8984147A0 (it) 1989-08-04
IT1234373B (it) 1992-05-15

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