EP0208695A1 - Sitzmöbel mit feder für die sitzschale. - Google Patents
Sitzmöbel mit feder für die sitzschale.Info
- Publication number
- EP0208695A1 EP0208695A1 EP85904798A EP85904798A EP0208695A1 EP 0208695 A1 EP0208695 A1 EP 0208695A1 EP 85904798 A EP85904798 A EP 85904798A EP 85904798 A EP85904798 A EP 85904798A EP 0208695 A1 EP0208695 A1 EP 0208695A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spring
- seat
- support
- axis
- support arm
- 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.)
- Granted
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
- the invention relates to a piece of seating furniture, in particular for children and adolescents, with a seat shell and backrest, with a support column supported on the floor via approximately horizontal support arms and with an approximately horizontal support arm supported on the support column and with an in Proximity to the horizontal axis supported for the support of the knees of the seating furniture user on the seat shell on the support arm, he with a swiveling seat shell support, which is connected to the support arm via the axis, and with a spring device supported on the support arm and engaging on the seat support, which the pivoting of the seat pan support diminishes when reducing a swivel angle limited by stops and drives when enlarged.
- the spring serves as an aid for setting a seat pan inclination as required, which can be fixed by means of a device which locks the pivotable seat pan carrier to the non-pivotable carrier arm.
- the seat pan is moved in one pivoting direction by use load and in the other pivoting direction by a gas spring acting as a return spring, the housing of which is articulated at the bottom on the support column and at the top on the seat pan support - 2 -
- the arrangement of the swivel axis in the immediate vicinity of the area of the seat shell intended for supporting the backs of the knees of the seating furniture user has the advantage that, even in the event of a greater adjustment of the seat shell inclination, the feet cannot be lifted off the floor.
- the seat part inclination can be fixed in the set position by the gas spring. It is also known to arrange and design a helical spring in a seating arrangement without variable seat part inclination in an approximately vertical arrangement between the seat shell support and the support arm in such a way that the seat furniture user can sit relatively 'softly' by the seat part support being cushioned the support arm with a maximum compressed helical spring.
- the invention has for its object to develop a piece of seating furniture of the type mentioned at the outset without any significant additional technical outlay such that the user of the seat furniture can cause a relatively strong rocking of the seat shell on the one hand by relatively small shifting of the center of gravity, and on the other hand unwanted rocking movements - 3 -
- the support arm can be supported at different heights on the support column running behind the seat shell and the energy accumulator of the spring device is formed by at least one helical spring (helical spring; Vo body weight is adjustable in such a way that the seat pan inclined backwards at a pivoting angle is held in suspension by the spring device in a central region of the pivoting angle.
- helical spring helical spring
- the arrangement of the support column behind the seat shell, ie outside a vertical parallel projection "of this seat shell, in conjunction with the preferably horizontal arrangement of the spring device, enables the use of relatively large coil springs, in which the load potential does not have to be fully exploited. On the one hand, this gives the possibility of a 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 curve.
- the seating furniture can be used, for example, for children aged 4-6 years (Fig. 2), but also for young people aged 13- 16 years and for adults (Fig.
- the backrest forms a rocking unit with the seat pan support.
- the armchair can be used as a rocking chair.
- Fig. 4 shows the pivot angle of the seat shell in Ver Struktur ⁇ nis the tensile elongation of the coil spring in a schematic 'diagram
- FIG. 5 shows a section along line V-V of FIG. 3
- FIG. 6 shows a detail in the area of the screw pull springs in a bottom view in an enlarged view
- FIG. 7, 8 shows a variant of the seating furniture in side and rear view (without base frame)
- FIGS. 8 and 9 shows a further variant in a representation corresponding to FIGS. 8 and
- the seating is based on the fig. 1-10 described:
- the armchair with upholstered (upholstery 27b) seat shell 27 and backrest 28 comprises a support column 12 supported on the floor via horizontal support arms 10. In the illustrated embodiment, this runs behind the seat shell 27 so that, as can be seen from FIG , can be set extremely low.
- the support column 12 is formed by a curved tube with tube legs running symmetrically to the vertical syirie plane bb (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 4 in a pivot bearing 10c of the foot part.
- 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 more than 90 and ' merge ' into a linear adjustment section 12c " , which therefore includes an acute angle (FIG. 1) to the vertical.
- At the adjustment section 12c an approximately horizontal, arm-shaped support arm 14 is supported for adjustable height in the seat shell 27.
- the adjustment section 12c for the seat shell 27 is followed by an oppositely inclined, linear adjustment section 12d for the backrest 28.
- 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 Rohrsche merging into one another
- the arms of the support arm 14 have sections 14c which rise backwards and sleeve-side sections 14b and which rise from the web-side sections 14b, as can be seen in particular from FIG. 3. - 7 -
- the rise angle of the mentioned sections 14c, 14b is about the same size and is about 5 -10 °.
- FIG. 3 The manner in which the sleeves 14d for the support arm 14 and the same IX locks 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 by means of 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 in the immediate vicinity of the seating for the seating of the user of the knee.
- 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 at a distance from the axis 42 on the extension arm
- the helical tension spring can be pretensioned by means of a pretensioning device which comprises a threaded bolt 36 which runs in the pull axis aa and which on the back is connected to a stationary part of the seating furniture - 8th -
- span nut 40 Before supported * span nut 40 is in threaded engagement. 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 preload nut 40 is supported on a crosspiece 14e of the support arm 14 via a washer 41.
- the seat shell 27, which is inclined backwards at maximum tensile elongation of the helical tension spring 57, can be freely pivoted about the axis 42 via a pivoting angle O.
- the seat shell 27 is within the central region M of the swivel angle Oc, that is to say at a tensile strain t deviating from the maximum tensile strain cc from the screw tensile spring 57 suspended healed, as can be seen in particular from FIG. 4.
- the tension axis aa of the coil spring 57 extends approximately horizontally.
- the swivel angle C is approximately 10 in the drawing, as shown in the drawing. 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 swivel 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 aa, 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 inclined slightly to the front.
- the extreme upper and lower swivel positions of the seat shell 27 are indicated with No and Nu and the central region M of the swivel angle OY is shown.
- the position of the pull axis aa also changes slightly. In the example of FIG. 4, it is slightly inclined downward at maximum tensile elongation.
- the reference numerals of components which are functionally comparable to corresponding components in the exemplary embodiment described but are designed differently, are provided with one or two index lines (for example support column 12 in FIG. 1-6; 12 'in FIGS. 7, 8 and 12 "in FIG. 9).
- the two further exemplary embodiments mentioned differ from the exemplary embodiment according to FIGS. 1-6 essentially in that the backrest 28';28" with the Seat part support 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 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 fixed axially in different positions by means of locking screw 64.
- This sleeve 60 is fastened to a connecting plate 62 which is welded to the angle profiles of the seat pan support 13.
- a sleeve 28a 'or 28 "of the kick rest 28' or 28" is plugged 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 spring 57.
- the preload nut 40 ' is supported on the extension arm 35'.
- the coil tension spring is articulated on the support arm 14 via the crossbar.
- the tubular legs of the support column 12 ' run vertically in the adjustment section 12c' and are bent backwards upwards in the horizontal direction in order to merge into one another via a web.
- the tube legs of the support column 12 ′′ form an acute angle to the vertical in the adjustment section 12c ′′ 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.
- 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 terminal cover sleeves 42c, which in turn are fixed to the sleeves 42b the bearing axis 42a are connected.
- the seat shell 27 becomes a seat part inclination No according to FIG - 11 -
- 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, provided that the user does not change his center of gravity significantly through active or unconscious movements.
- 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 easily realized in a larger swivel angle range, whereby the extreme seat part inclination Nu is not achieved in the seat.
- two leg springs 57 ' which are subjected to torque are used as the energy store instead of the helical tension spring 57 which can be subjected to tension. These are arranged symmetrically to the plane of symmetry bb of the seating furniture on a non-rotatable, stationary axis 42 ′, which serves as a pivot bearing for the seat pan support 13.
- the two leg springs 57 ' are each connected with their front spring legs 57a via a pretensioning device V to the support arm 14 and supported with their rear spring legs 57a' on the seat pan support 13.
- the non-rotatable axis 42 ' is fixedly connected to the support arm in the region of the web 14a via support elements 26'. Since the support elements 26 'are each arranged on the outside of the adjacent profile leg 13v of the angle profile of the seat pan support 13, the entire structure stands - 12 -
- the biasing device V comprises a threaded bolt 36 'which is in threaded engagement with a biasing nut 40 supported on the support arm 14.
- the two front spring legs 57a of the leg springs 57 'arranged in mirror image to one another are articulated in an eyelet of the threaded bolt.
- the two rear, substantially elongated spring legs 57a ' are each received via their bent free end in a curve 65 of the adjacent vertical professional leg 13v of the seat pan support 13. In their elongated sections, the rear spring legs 57a 'are each surrounded by a stiffening tube 66. It is thereby achieved that the extremely long spring legs 57a 'do not bend under the working load when the pivoting angle 0 is reduced, but rather the torque which is generated is transmitted directly to the body of the leg spring 57'.
Description
Claims
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 |
---|---|---|---|
DE19853500932 DE3500932A1 (de) | 1984-01-14 | 1985-01-12 | Sitzmoebel |
DE3500932 | 1985-01-12 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0208695A1 true EP0208695A1 (de) | 1987-01-21 |
EP0208695B1 EP0208695B1 (de) | 1989-08-02 |
Family
ID=6259748
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85904798A Expired EP0208695B1 (de) | 1985-01-12 | 1985-09-20 | Sitzmöbel mit feder für die sitzschale |
Country Status (7)
Country | Link |
---|---|
US (1) | US4712835A (de) |
EP (1) | EP0208695B1 (de) |
JP (1) | JPH0753131B2 (de) |
AU (1) | AU4957985A (de) |
CA (1) | CA1250218A (de) |
DE (1) | DE3571917D1 (de) |
WO (1) | WO1986003954A1 (de) |
Families Citing this family (9)
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, De | |
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. |
US7290836B2 (en) * | 2003-08-28 | 2007-11-06 | A-Dec, Inc. | Patient chair |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE488799A (de) * | 1948-09-21 | |||
DE820475C (de) * | 1950-04-09 | 1951-11-12 | Erich Isenberg | Drehstuhl o. dgl., insbesondere Stahlrohrsessel mit schwebendem Sitz |
NL85451C (de) * | 1955-06-02 | 1957-06-15 | ||
JPS445848Y1 (de) * | 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 |
-
1985
- 1985-09-20 US US06/919,263 patent/US4712835A/en not_active Expired - Lifetime
- 1985-09-20 JP JP60504382A patent/JPH0753131B2/ja not_active Expired - Fee Related
- 1985-09-20 DE DE8585904798T patent/DE3571917D1/de not_active Expired
- 1985-09-20 AU AU49579/85A patent/AU4957985A/en not_active Abandoned
- 1985-09-20 EP EP85904798A patent/EP0208695B1/de not_active Expired
- 1985-09-20 WO PCT/DE1985/000325 patent/WO1986003954A1/de active IP Right Grant
- 1985-10-31 CA CA000494301A patent/CA1250218A/en not_active Expired
Non-Patent Citations (1)
Title |
---|
See references of WO8603954A1 * |
Also Published As
Publication number | Publication date |
---|---|
DE3571917D1 (en) | 1989-09-07 |
WO1986003954A1 (en) | 1986-07-17 |
JPS62501331A (ja) | 1987-06-04 |
CA1250218A (en) | 1989-02-21 |
AU4957985A (en) | 1986-07-29 |
JPH0753131B2 (ja) | 1995-06-07 |
US4712835A (en) | 1987-12-15 |
EP0208695B1 (de) | 1989-08-02 |
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