EP0049310B1 - Arbeits-Sitzmöbel - Google Patents

Arbeits-Sitzmöbel Download PDF

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Publication number
EP0049310B1
EP0049310B1 EP80108111A EP80108111A EP0049310B1 EP 0049310 B1 EP0049310 B1 EP 0049310B1 EP 80108111 A EP80108111 A EP 80108111A EP 80108111 A EP80108111 A EP 80108111A EP 0049310 B1 EP0049310 B1 EP 0049310B1
Authority
EP
European Patent Office
Prior art keywords
seat
article
furniture according
articulation
sitting furniture
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
EP80108111A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0049310A1 (de
Inventor
Klaus Franck
Werner Sauer
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.)
Wilkhahn Wilkening and Hahne GmbH and Co KG
Original Assignee
Wilkhahn Wilkening and Hahne GmbH and Co KG
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 Wilkhahn Wilkening and Hahne GmbH and Co KG filed Critical Wilkhahn Wilkening and Hahne GmbH and Co KG
Priority to AT80108111T priority Critical patent/ATE12169T1/de
Publication of EP0049310A1 publication Critical patent/EP0049310A1/de
Application granted granted Critical
Publication of EP0049310B1 publication Critical patent/EP0049310B1/de
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
    • 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
    • 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
    • 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
    • A47C1/03272—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest characterised by elastic means with coil springs
    • 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
    • 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

Definitions

  • the invention relates to a piece of work seating, with a backrest hingedly connected to a seat and with a base frame, on which the seat is supported in its front region via a joint and the backrest is supported by a lumbar support arm, the support lever being approximately below the
  • the center of the seat is articulated on the underframe and, in the basic position, the seat is oriented essentially horizontally and the backrest is oriented vertically on the middle and is returned to the basic position by a return spring force.
  • the seating furniture in which the seat inclination and the back inclination can be changed in a certain ratio to one another are known in various embodiments.
  • the seating furniture In the unloaded state, the seating furniture, when the seat is generally horizontal, has an angle of 90 ° between the seat and the backrest, which is maintained as long as the user in the working position essentially only loads the seat surface. If the user wants to lean back into a rest position, the known seat furniture tilts - generally only after releasing a lock - the seat surface slightly downwards by a small angle at the rear end and swivels the backrest by a two to three times larger Angle backwards, with angles of up to 130 ° C between the seat and back surface for the rest position.
  • Such seating furniture with so-called “synchronous" seat and back adjustment already provides an ergonomically quite favorable adaptation of the seating furniture support surfaces to the respective posture of the user, but this applies only to a limited extent in the area of the lower lumbar vertebrae if, for example, the arrangement according to DE -OS 2 332 596 links the rear seat edge directly or via low pedestals to the adjacent backrest. It has therefore already been provided, e.g. in the case of the seating furniture according to DE-GM 7 721 954 and 7 815 561, to divide the seat into a front and into a rear partial surface which is connected to the latter in an articulated manner. In this case there are three inclinable body support surfaces including the backrest, but here the adaptation to the respective posture is only achieved by a considerable additional construction effort.
  • a recliner with a one-piece seat-back shell which consists of two rigid zones that are articulated to each other by a flexible central zone.
  • the backrest is inclined backwards and held on armrests by leather straps.
  • the shell When the user straightens up, the shell there is pressed deep down and the previously horizontal seat is pivoted into a very inclined position.
  • the well-known armchair cannot be used as work seating.
  • the invention has for its object to provide a work seating with synchronous seat and backrest adjustment that - while avoiding complex mechanics - an effective support also in the area of the lumbar vertebrae and in the rest position an even from the hollow of the knee to the shoulder blades Ensuring the support surfaces fit the user's body.
  • This object is achieved according to the invention in that the seat and the backrest merge into one another via an arcuate, bendable intermediate part and in that the connecting line of the two articulation points of the support lever in the basic position at an angle between 0 to 25 °, preferably between 15 to 25 ° , is inclined to the vertical.
  • the steep position of the support lever in the basic position ensures that when changing from an upright work posture to a reclined posture, the backrest is first moved considerably more horizontally backwards than downwards. In connection with the widening and quasi-rolling intermediate part between the seat and backrest, this provides a uniform and extensive support of the entire body during the transition to the rest position.
  • the anatomy of the human body is taken into account in such a way that when changing over to a rest position, the upper body not only swings backwards like a lever around a joint, but at the same time the body also swings over the pelvis of the pelvis rolls a little to the rear and the upper body also collapses somewhat as the at least lower back lumbar vertebrae are moved back.
  • the seating furniture according to the invention is adapted to these body movements and proves to be a very tight, comfortable support.
  • the backrest is convexly curved in the vertical longitudinal section towards the seat and that the lower half of the backrest is inclined forward in the basic position. This enables a very good support of the lower lumbar vertebrae and the cross area when sitting upright, in which the lower part of the spine is also slightly inclined forward.
  • the seat according to the invention performs a clear evasive movement to the rear, so that the user's pelvis can roll and the spine can pass into a more extended and reclined position.
  • the distance between the two articulation points of the support lever is approximately twice as large as the distance between the lower articulation point of the support lever and the front seat articulation point and that these articulation points define an acute-angled triangle in the basic position.
  • the constellation of these articulation points results in a coordinated behavior of the seat and backrest inclinations in the different seating positions of the human body.
  • the flexible intermediate part proves to be of great advantage in the invention, since it makes mechanical sliding joints, toggle levers or similar complex mechanics superfluous.
  • the seat linkage is about a quarter of the seat depth behind the front edge of the seat and that the front third of the seat is bent downward to a greater extent than the front edge of the seat is pivoted up when the seating furniture is pivoted back.
  • the lower articulation point of the support lever can be offset from the center of the seat by about 10% of the seat depth, which among other things results in a great stability of the seating furniture against tipping.
  • the backrest can be concavely curved in cross section to the seat and can be provided with a strongly drawn lumbar bulge, on which the upper articulation point of the support lever is arranged.
  • these measures directly improve the support and, on the other hand, enable the support levers to be set very steeply without impairing the appearance of the seating furniture.
  • the seat and the backrest consist of a one-piece plastic shell.
  • the shell can have semi-cylindrical bearings with a snap edge at the front seat pivot point for receiving a horizontal bearing axis attached to the base frame.
  • the seating furniture can be manufactured as a chair or as an armchair with armrests. In the latter case, elastic armrests are provided, which are attached to the articulation points of the seat and backrest on the seating furniture. With appropriate dimensions, these armrests can provide the entire return spring force for the seating furniture alone. Instead of or in addition to the springback via the armrests, it can also be provided that the support lever is loaded directly or indirectly at its lower end by a return spring.
  • the seating furniture can be equipped with a device for adjusting the bias of the return spring in order to be able to adapt to the weight and size of the user.
  • the chair can be equipped with a device for locking the support lever at least in the basic sitting position.
  • either a torsion axis as the lower linkage of the support lever or helical or leaf spring or a gas spring can be provided as the return spring, which act on a cam projecting radially from a lower bearing shaft.
  • the seat and backrest each have separate frames which merge into one another via elastic intermediate pieces.
  • a column-shaped base frame 1 and 2 has a column-shaped base frame 1, from which at the upper end, approximately below the middle of the seat, a flat, broad support arm 2 protrudes obliquely upwards, which carries a horizontal axis 3 'at its front end, on which the seat 4 is articulated in its front area.
  • a horizontal shaft 5 ' is mounted, at the two ends of which a support lever 6 is rigidly attached, the other end of which is approximately at lumbar height on a backrest 7 of the seating at position 8 are articulated at lumbar height.
  • the articulation points 3, 5 and 8 form an acute-angled triangle, the connecting line V between the articulation points 5 and 8 being approximately twice as long as the distance between the articulation points 3 and 5 on the base frame.
  • the connecting line V between the articulation points 5 and 8 of the support lever 6 is inclined at an angle a of approximately 20 ° with respect to the vertical.
  • the basic position 1 is fixed to the front by a stop (not shown).
  • the seat 4 and the backrest 7 consist of a one-piece plastic shell and are connected to one another in a virtually articulated manner by a middle or intermediate part 9 which is almost flat in cross section.
  • the radius of curvature of this flexible intermediate part 9 is approximately 10 cm in the basic position.
  • the backrest 7 is convex towards the seat - seen in the vertical longitudinal section - and the lower half 10 of the backrest 7 is inclined forward in the basic position.
  • the backrest 7 is also curved in a horizontal cross-section concave to the seat and provided with a strongly drawn lumbar bulge 11, on each of which the upper articulation points of the two support levers 6 are designed in the form of bearing eyes 12 (FIG. 5).
  • the front seat pivot point 3 lies about a quarter of the seat depth T behind the front edge 13 of the seat, and the front third of the seat is bent downward.
  • the seat 4 In the working position according to FIG. 1, the seat 4 is essentially horizontal and the backrest 7 is aligned vertically on the middle, as indicated by the dash-dotted lines S and R in FIG. 1.
  • the entire seat pivots on the one hand around its front articulation point 3 by a small angle ⁇ , but the relatively steep support lever 6 of the backrest 7 additionally forces a pivoting movement by an angle y backwards.
  • a considered point P lying at the lumbar level thus executes a movement component X in the horizontal direction, which is considerably larger than its movement component Y in the vertical direction, when moving into the position P 'of the rest position. This corresponds to the natural movement of the body (see FIGS. 12 and 13) during the transition from an upright sitting posture according to FIG.
  • the transition area 9 between seat 4 and backrest 7 is bulged out to the rear to such an extent that, when sitting in a straight position, a free space 18 usually remains, into which the pelvis inserts itself during the transition into the inclined position.
  • Fig. 3 shows the chair according to FIGS. 1 and 2 in a further development as an armchair with elastically resilient armrests 19 which are fastened to the seat or to the backrest in the region of the articulation points 3 and 8.
  • the seat and backrest each comprise an approximately U-shaped support tube frame 21, 22, in the open ends of which bent spring steel pieces 23 are inserted with their ends.
  • the bent spring steel pieces 23 in turn form the flexurally elastic zone analogous to the intermediate part 9 of the exemplary embodiment according to FIG. 1, and they are also strongly curved in accordance with the seat shell representations according to FIGS. 5 and 13.
  • the two support arms 6 and 6 ' are each about a torsion axis 24, 24 'mounted in the base, which provide the springback force.
  • the torsion axes are taken from a cross member 25 to which they are rigidly attached in the center, see also FIG. 6.
  • FIG. 6 illustrates a device with which the clamped middle ends of the torsion axes 24/24 'can be pretensioned.
  • return springs are preferably provided in the form of cylindrical coil springs or a leaf spring assembly, which are arranged within the support arm 2.
  • the restoring spring designed as a leaf spring assembly 28 according to FIG. 7 can likewise be used to set the desired restoring force.
  • the leaf spring assembly 28 lies at one end between an L-shaped receptacle 29 arranged on the support arm 2 and an abutment 30 screwed onto the support arm 2. Its free end lies on the foot end of a cap screw 31 which passes through a cam 32 which is held by a clamping ring 33 is rotatably connected to the horizontal shaft 5 '. By screwing in the screw 31, the leaf spring assembly 28 is bent around its abutment 30 and is thus preloaded.
  • the restoring force is exerted on the backrest 7 by two helical springs 34 arranged parallel next to one another.
  • the helical springs 34 enclose bolts 35, which at one end pass through a movable abutment plate 36, which forms a support surface for the helical springs 34.
  • the second support surface of the coil springs 34 forms a pressure plate 38 which is firmly connected to the bolts 35.
  • the bolts are each rotatably connected to a cam 39 of the horizontal shaft 5 'via a fork head 37.
  • the bolts 35 are mounted in corresponding bores in the rigid support plate 40 and also protrude beyond the support plate 40 in the rest position.
  • the support plate 40 carries on an L-shaped bend 41 a bearing piece 43 provided with an inclined plane 42, on the inclined plane 42 of which a slide piece 44 is seated a threaded hole directed onto the inclined plane is provided.
  • a knurled head screw 45 which passes through the angled portion 41 and the bearing piece 43 with great play and is screwed into the sliding piece 44, the abutment plate 36 can be moved together with the sliding piece and thus the spring preload can be adjusted.
EP80108111A 1980-10-01 1980-12-22 Arbeits-Sitzmöbel Expired EP0049310B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT80108111T ATE12169T1 (de) 1980-10-01 1980-12-22 Arbeits-sitzmoebel.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3036993 1980-10-01
DE19803036993 DE3036993A1 (de) 1980-10-01 1980-10-01 Arbeits-sitzmoebel

Publications (2)

Publication Number Publication Date
EP0049310A1 EP0049310A1 (de) 1982-04-14
EP0049310B1 true EP0049310B1 (de) 1985-03-20

Family

ID=6113289

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80108111A Expired EP0049310B1 (de) 1980-10-01 1980-12-22 Arbeits-Sitzmöbel

Country Status (12)

Country Link
US (1) US4451085A (xx)
EP (1) EP0049310B1 (xx)
JP (1) JPS5764014A (xx)
AR (1) AR227548A1 (xx)
AT (1) ATE12169T1 (xx)
AU (1) AU542582B2 (xx)
BR (1) BR8102728A (xx)
CA (1) CA1156923A (xx)
DE (2) DE3036993A1 (xx)
ES (1) ES267165Y (xx)
MX (1) MX152858A (xx)
ZA (1) ZA814319B (xx)

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Publication number Priority date Publication date Assignee Title
DE102011105290A1 (de) 2010-06-15 2011-12-15 Claudia Plikat "Stuhl"
US8967726B2 (en) 2007-09-20 2015-03-03 Herman Miller, Inc. Load support structure
US11553797B2 (en) 2015-04-13 2023-01-17 Steelcase Inc. Seating arrangement

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JP5921767B2 (ja) 2012-05-07 2016-05-24 ジョンソン コントロールズ テクノロジー カンパニーＪｏｈｎｓｏｎ Ｃｏｎｔｒｏｌｓ Ｔｅｃｈｎｏｌｏｇｙ Ｃｏｍｐａｎｙ 車両座席の垂直調整用の座席調整装置
DE102012013208B4 (de) 2012-05-07 2019-07-25 Adient Luxembourg Holding S.À R.L. Sitzteil eines Fahrzeugsitzes
DE102012208721A1 (de) * 2012-05-24 2013-11-28 Lufthansa Technik Ag Flugzeugsitz mit einer Sitzbaugruppe
MX356358B (es) * 2012-09-05 2018-05-25 Godrej & Boyce Mfg Co Ltd Silla con respaldo y asiento ajustables.
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DE102013022122A1 (de) * 2013-12-28 2015-07-02 Klöber GmbH Arbeitsstuhl mit Synchronmechanik und Biegefeder
DE202014100062U1 (de) * 2014-01-08 2015-04-10 Innotec Motion GmbH Sitzmöbel mit federnder Rückenlehne
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US10966527B2 (en) 2017-06-09 2021-04-06 Steelcase Inc. Seating arrangement and method of construction
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US8967726B2 (en) 2007-09-20 2015-03-03 Herman Miller, Inc. Load support structure
DE102011105290A1 (de) 2010-06-15 2011-12-15 Claudia Plikat "Stuhl"
WO2011157392A1 (de) 2010-06-15 2011-12-22 Claudia Plikat Stuhl
US11553797B2 (en) 2015-04-13 2023-01-17 Steelcase Inc. Seating arrangement

Also Published As

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DE3036993A1 (de) 1982-05-13
JPS6348529B2 (xx) 1988-09-29
ES267165Y (es) 1983-10-16
BR8102728A (pt) 1982-08-17
JPS5764014A (en) 1982-04-17
AU6866581A (en) 1982-04-22
CA1156923A (en) 1983-11-15
ZA814319B (en) 1982-07-28
MX152858A (es) 1986-06-23
US4451085A (en) 1984-05-29
AR227548A1 (es) 1982-11-15
ES267165U (es) 1983-03-16
EP0049310A1 (de) 1982-04-14
DE3070356D1 (en) 1985-04-25
ATE12169T1 (de) 1985-04-15
AU542582B2 (en) 1985-02-28

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