WO2003032779A1 - Sitzmöbel, insbesondere bürodrehstuhl - Google Patents
Sitzmöbel, insbesondere bürodrehstuhl Download PDFInfo
- Publication number
- WO2003032779A1 WO2003032779A1 PCT/EP2002/011465 EP0211465W WO03032779A1 WO 2003032779 A1 WO2003032779 A1 WO 2003032779A1 EP 0211465 W EP0211465 W EP 0211465W WO 03032779 A1 WO03032779 A1 WO 03032779A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- seat
- support
- spring
- furniture according
- clamping
- Prior art date
Links
- 230000001360 synchronised effect Effects 0.000 claims description 7
- 238000006073 displacement reaction Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 241000446313 Lamella Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000037396 body weight Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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
- A47C1/03205—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination
- A47C1/0325—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest having adjustable and lockable inclination by means of clamps or friction locking members
-
- 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
- A47C1/03294—Reclining or easy chairs having coupled concurrently adjustable supporting parts the parts being movably-coupled seat and back-rest slidingly movable in the base frame, e.g. by rollers
Definitions
- the invention relates to a chair or a swivel office chair according to the preamble of claim 1, which is provided with a clamping device which works according to the friction-locking lamella principle.
- Such a clamping device is known from WO 86/00508.
- the clamping device is accommodated there as a structural unit axially movably m support bearings of the seat part.
- a self-locking eccentric with a slight increase in its eccentric curve, which is supported on the clamping bolt via its swivel axis, engages on the front side of the friction disc pack.
- the swivel path required for jamming can be considerably reduced due to the axial mobility.
- the support of the clamping device can be damaged when the eccentric is actuated.
- a similar clamping device working with an eccentric is also known from EP 0 786 952 B1.
- the present invention has for its object to provide a seat with a reliable and largely secured against overloading clamping device.
- the eccentric lever is replaced by a lever which has at least two contact surfaces which are connected to one another via a dead center.
- the contact surfaces are at different distances from the center of the pivot axis of the lever, so that they exert a different clamping force on the friction clutch plates. This ensures that free movement of the backrest and / or seat part is ensured in one position, while the clamping action starts in the other position. At least two defined positions are thus achieved, so that incorrect operation is largely excluded.
- the clamping device according to claim 5 is mounted as a structural unit in the support bearings of the chair so as to be axially movable, when actuated there is a relative movement between the clamping bolt and the adjacent frictional locking washers to a simultaneous, but opposite axial movement of the frictional locking washers and lamellae located on one side and the friction lock washers and plates arranged on the other side of the plane of symmetry of the plates.
- the friction discs and lamellae closer to the lever are pushed towards the middle hm, while the friction discs on the other side are pulled in the opposite direction. This results in a shorter clamping path of almost half the otherwise required clamping path.
- a seat depth shift of the seat part carrier can additionally be provided.
- the clamping device is nevertheless effective in all positions of the seat part wearer. With the seat depth adjustment, the armrests can also be moved at the same time.
- FIG. 1 shows a vertical section through the seat furniture with the upholstery removed according to line 1-1 of FIG. 4,
- FIG. 2 shows a vertical section through the seating furniture along line 2-2 of FIG. 4,
- FIG. 3 shows an enlarged detail from FIG. 2 in the region of the lever for actuating the clamping device
- FIG. 4 shows a top view of the seating furniture with the upholstery removed
- FIG. 4a shows a plan view of a modified exemplary embodiment of the seating furniture shown in FIG. 4,
- FIG. 5 shows an enlarged detail from FIG. 4 in the area of the friction locking plates
- FIG. 5a shows an enlarged section corresponding to FIG. 5 with modified lamellae
- FIG. 6 shows a vertical section along line 6-6 of FIG. 4
- FIG. 7 shows a vertical section along line 7-7 according to FIG. 4,
- FIG. 7a shows a vertical section along line 7-7 from FIG. 4 with a modified pressure piece for adjusting the force acting on the backrest
- FIG. 8 shows a vertical section along line 8-8 of FIG. 4,
- FIG. 8a shows a vertical section along line 8-8 of FIG. 4 with a modified adjusting lever and an eccentric interacting with it
- FIG. 9 shows a three-dimensional view of the seating furniture removed from the support foot without upholstery from the right
- FIG. 10 shows a side view of the seat furniture removed from the support foot without upholstery from the left
- FIG. 11 shows a three-dimensional partial view of the seat part support according to a further exemplary embodiment
- FIG. 12 shows a partial top view of the seat part support according to FIG. 11,
- FIG. 13 shows an enlarged detail from FIG. 12 in the area of the clamping device
- FIGS. 1 to 15 are provided with the same reference numbers and are therefore not described in detail with reference to all the figures. Rather, it is based on the total the figures refer to the elements of the seating described here.
- FIG. 1 shows a section through a piece of seating furniture, as is used in particular in an office swivel chair.
- the upholstery has been removed, but the central support leg 14 can still be seen below.
- the seating furniture has a console 10 which extends from the support leg 14 to the right and to which a backrest support 11 for a backrest and a seat part support 12 for a seat surface are articulated.
- a clamping device K is provided, which effects the clamping by means of lamellar friction.
- the clamping device has a packet of lamellae 20, which is preferably stacked alternately with frictional locking disks 18 (FIG. 5).
- the slats 20 are articulated on the backrest support 11 and / or on the seat part support 12.
- the articulation on the backrest support takes place via the axis 16, while at the opposite end on the right in FIG. 1 the slats 20 have an elongated hole 20a which is penetrated by a clamping bolt 21.
- the clamping bolt 21 is supported on a support bearing 17 (FIG. 3) and is mounted in an axially movable manner in the support ribs 38 (FIG. 3.5).
- the slats 20 shown in FIG. 5 are all of essentially the same thickness, the thickness of a slat preferably being approximately 0.4 mm.
- a number of thin plates for example 26 plates, are used which are relatively thin and, for example, 0.4 mm are thick.
- a number of thicker slats 20a, 20b, 20c which are, for example, 2.0 mm thick, are provided here for the longitudinal stabilization of the slats 20 or the entire slat package.
- three thicker slats are provided, one of which delimits the plate pack on the outside.
- a thicker slat can be provided in the middle.
- the number of thicker slats can be selected depending on the desired longitudinal stability of the slats or the plate pack.
- the thickness of the thinner and the thicker slats can also be adapted to different load cases.
- the actuation of the clamping device K takes place according to FIGS. 2 and 3 via a manually actuable lever 19.
- this lever When this lever is actuated, there is a frictional shift between the clamping bolt 21 and the packet of plates 20, the lever 19 with its pivot axis 22 in the clamping bolt 21 if necessary is self-locking. With this actuation, the distance between the lamellae 20 is shortened in order to achieve the clamping.
- At least two contact surfaces 19a, 19b are provided on the lever 19 in the region of the pivot axis 22 for contact with the mounting of the clamping bolt 21, that is to say in the exemplary embodiment for contact with the support bearing 17. As shown in FIG. 3, the contact surfaces are at different distances from the center of the pivot axis 22. In the position according to FIG.
- the contact surface 19a abuts the support bearing 17, which is less far from the center of the pivot axis 22. In this position there is no frictional clamping, so that the backrest support 11 and / or seat part support 12 can be moved relative to one another and / or with one another.
- the lever 19 is moved downward in FIG. 3, a dead area in the form of, for example, the dead center 19c must first be overcome before the bearing surface 19b then comes into contact with the support bearing 17.
- the contact surface 19b is at a greater distance from the center, so that the clamping bolt 21 is pulled to the left in FIG. 3. This leads to the desired clamping between lamellae 20 and frictional contact disks 18 and thus to a determination of the seating area in its respective position.
- the contact surface 19b extends relatively far down from the center. This ensures that after contact of the contact surface 19b on the support bearing 17, a further movement is not possible even with high force, since an above-average torque must be applied. This is intended to prevent incorrect operation, which could lead to damage to the bearing and / or the clamping device.
- the dead center must be overcome again, which is only a little further from the middle point of the pivot axis is removed as the contact surfaces 19a, 19b.
- the contact surfaces do not necessarily have to be flat, but can also be curved with any radius, for example. If necessary, an additional - if possible also removable - form-fitting connection between contact surfaces and support bearing can be achieved.
- the surface normals of the contact surfaces 19a, 19b preferably pass approximately through the center of the pivot axis 22, in order to ensure reliable contact of the contact surfaces with the support bearing 17.
- the dead center 19c is formed by an intersection of the two contact surfaces, which preferably extends parallel to the pivot axis 22.
- the cutting line can have any shape, e.g. curved or wavy. According to FIG. 5, frictional contact disks 18 with frictional contact surfaces, which are penetrated by the clamping bolt 21, are provided between the lamellae 20 to apply the forces required for the clamping action. In the clamping movement, the clamping bolt is pulled to the left in FIG. 5, which results in the desired clamping effect between the friction washers 18 and the plates 20.
- the clamping device is accommodated as a structural unit axially movable in the support bearings 17 and also in the support ribs 38 - in the exemplary embodiment - the bracket 10, so that the clamping bolt 21 and the lamellae 20 can simultaneously move axially in the longitudinal direction of the clamping bolt during the frictional displacement.
- the resulting relative movement leads to faster jamming, since the slats on the left and right of the center line of the set of slats 20 move towards one another. can.
- the slat 20 is guided with its elongated hole 20a on the clamping bolt 21 supported on the bracket 10 and articulated at its opposite end to an axis 16 connected to the backrest support, on which at the same time the weight force spring (spring 13) for setting the weight force is articulated.
- weight force spring (spring 13) shown in FIGS. 1, 2 and 4 in addition to the weight force spring (spring 13) shown in FIGS. 1, 2 and 4, additional weight force springs 13a and 13b can be provided, which are on the one hand at the front on an axis AI connected to the console 10 and on the other hand of the axle 16 connected to the back support are attached and build up tensile forces which intercept the base load and serve to support the body weight adjustment, which is carried out by means of the pressure piece 30, which will be discussed in more detail below.
- the armrest holder 29 can also be formed continuously across the seat part support 12 in order to improve the statics of the seat furniture.
- backrest support 11 and seat part support 12 are coupled to one another via a driving axis 23 for synchronous movement.
- the seat part carrier 12 In order to enable the movement of the seat part carrier 12, it is guided in the front elongated holes 15 during the synchronous movement.
- the front elongated holes 15 are dimensioned in such a way that they allow the seat part carrier 12 to be displaced further in depth.
- the seat part carrier 12 is except in the front elongated holes 15 in at least one further, arranged behind the front elongated holes 15, rear elongated hole 24.
- the at least one rear elongated hole 24 has a grid 24a for determining the seat depth that is set in each case.
- the seat depth shift can be actuated manually via the lever 41, a locking pin 25 being brought out of engagement with the catch 24a against the force of a spring 27 when the lever 41 is actuated.
- the seat depth can then be changed in this position.
- the component receiving the rear elongated hole 24 is at the same time a synchronous lever which is pivotably arranged between the backrest support 11 and the seat part support 12 and which is connected at one end via the driving axis 23 to the backrest support and at the other end via the bracket 26 to the seat part support.
- the armrest holder 29 can at the same time be fastened, so that - if present - the armrests move together with the seat part support when the seat depth is displaced.
- the clamping device K nevertheless causes a clamping in any set seat depth.
- the spring 13 On the axis 16, on which the clamping disks 20 are mounted, the spring 13 is also mounted at one end, against the force of which the user transfers the backrest from the working position to the rest position. This force must be adjusted to the respective user.
- an eccentric adjustment is provided which is actuated via the lever 37 in FIG. 9.
- a pressure piece 30 is actuated via an axis 42, which acts on the sheet piece 40 articulated on the bracket 10 via the axis 39.
- the Bo- Genstuck 40 em bearing part 31 At the Bo- Genstuck 40 em bearing part 31 is provided. If the preferably multi-stage rotary adjustment 37 is actuated, the bearing part 31 is moved to the right in FIG. 6, the spring 13 being compressed while increasing the spring force to be applied. The bearing piece 31 is moved along the bolt 32.
- the spring 13 is supported at the other end on the console 10.
- FIG. 7a shows a pressure piece 30 ', the contour of which deviates from that which is shown in FIG. 6. It is clear, among other things, that contact surfaces are formed which are located at a greater distance from the axis 42, so that a larger adjustment path can be realized with the aid of the eccentric adjustment given here. The forces of the spring 13 m can thus be changed within a larger frame, against which the user transfers the backrest from the working position to the rest position. Overall, this makes it easier to adjust the seating furniture to different weights of the user.
- a gas spring 33 provided in the central support foot 14 for height adjustment of the chair can be influenced via the rotary adjustment 35 shown in FIG. 9.
- the rotary adjustment 36 acts on the two-armed actuating lever 37 via the eccentric 35. Is thus moving the cam 35 in Figure 8 to the left, the lever 34 acts on the gas spring 33, a ⁇ , then that these adjust initiated.
- the gas spring is designed in a known manner in such a way that the chair is adjusted upwards when the actuating lever is actuated, while it is adjustable downwards under the load of the user
- Figure 8a shows a rotary adjustment with an eccentric 35 ', which is characterized in that it projects further beyond the associated actuation axis.
- the setting lever 34 ' is designed such that larger forces can be exerted on the gas spring 33.
- the actuating lever has three arm regions which are arranged essentially at a right angle to one another and of which a first 34 ′ a cooperates with the eccentric 35 ′, which is arranged at a right angle to a second middle arm 3 ′ b.
- a third arm 34 'c arises from the end of the second arm 34' b facing away from the first arm 34 'a at an angle of approximately 90 °, the free end of which acts on the gas spring 33 and thus serves to adjust it.
- the contour of the eccentric 35 ' is adapted to the force conditions given here, that is to say modified in relation to the contour of the eccentric 35 shown in FIG.
- FIGS. 11 to 15 show an alternative rotary adjustment for manually adjusting the restoring force of a spring 13 against the force of which the user transfers the backrest from the working position to the rest position.
- the seat part support 12 is arranged stationary, so that only the backrest support 11 moves relative to the console 10.
- the weight force setting described below can also be used for a chair that uses a synchronizing mechanism. has mechanisms for the simultaneous movement of the seat and backrest.
- the rotary adjustment moves at least one wedge-shaped actuating element 43 such that the restoring force is set against its spring force by changing the distance between parts of the spring 13.
- the spring 13 ⁇ is formed by at least one leg spring, in the exemplary embodiment a double leg spring, the turns of which are penetrated by the axis 23 v , to which the backrest support 11 is articulated in the exemplary embodiment.
- the spring could be arranged on axes 16 or 23.
- the double leg spring it is supported on two parts which are movable relative to one another and which are formed by the console 10, seat part support 12 and backrest support 11.
- the exemplary embodiment is a part 13a of the spring 13 on the stationary ⁇ Wegteitrager and mutatis mutandis to the console another part 13b of the spring 13 on the seat backs ⁇ exchanger truncated.
- the wedge-shaped actuating element 43 is parallel to the axis 23, 16; 23 ⁇ arranged on a spindle 45 and movable on a sliding surface 44 along the bracket 10 or here the seat part support 12.
- the wedge surface of the wedge-shaped actuating element acts in accordance with FIGS. 12,15 with the wedge surface of a part 13a of the spring 13 x bearings supporting wedge 46 for adjusting the restoring force together. If the rotary adjustment 37 is actuated, the wedge-shaped actuating element is moved to the left or right by its thread engagement with the spindle rotated by the rotary actuation in FIG. 12.
- the interplay of the wedge surfaces changes the distance of the loop forming part 13 a from the mounting of parts 13 b while adjusting the force of the spring 13 ⁇ .
- the storage key 46 is apart from the operative connection with the wedge-shaped actuating element 43 loosely between the portion 13a of the spring 13 x and the wedge-shaped actuating element is clamped.
- the loop is mounted in a recess 46a of the bearing key 46.
- the slats 20 are shaped differently in this exemplary embodiment according to FIG. 14 but fulfill the same function.
- the clamping bolt 21 is axially movable.
- FIGS. 12 and 13 show another important element of the clamping device, which is present in both exemplary embodiments. If the lever 19 is actuated and the clamping voltage is released, it must be ensured that the chair, when it is not loaded and, for example, a child unintentionally actuates the lever 19, does not move into the working position due to the restoring force of the spring 13, 13 ⁇ , 13a, 13b returns. Therefore, when the clamping device K is released, a securing spring 47 which initially maintains the frictional engagement is provided on the clamping bolt 21 until the frictional engagement between the slats is released by a relieving movement by pressure on the backrest or the seat surface.
- a spring that performs the same function can also be found - not emphasized in the drawing - in FIG. 2 to the left of the lamellae 20. Further components such as sleeves or the like are not required for this anti-snap function, so that an inexpensive but nevertheless secure clamping device is provided
Landscapes
- Health & Medical Sciences (AREA)
- Dentistry (AREA)
- General Health & Medical Sciences (AREA)
- Chairs Characterized By Structure (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE20116683U DE20116683U1 (de) | 2001-10-13 | 2001-10-13 | Sitzmöbel, insbesondere Bürodrehstuhl |
DE20116683.6 | 2001-10-13 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2003032779A1 true WO2003032779A1 (de) | 2003-04-24 |
Family
ID=7962739
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2002/011465 WO2003032779A1 (de) | 2001-10-13 | 2002-10-14 | Sitzmöbel, insbesondere bürodrehstuhl |
Country Status (2)
Country | Link |
---|---|
DE (1) | DE20116683U1 (de) |
WO (1) | WO2003032779A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102011010099A1 (de) * | 2011-02-01 | 2012-08-02 | Bock 1 Gmbh & Co. Kg | Synchronmechanik |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2915368A1 (de) * | 1979-04-14 | 1980-10-30 | Link Wilhelm Kg | Buerostuhl |
EP0394784A1 (de) * | 1989-04-27 | 1990-10-31 | Lineager S.R.L. | Klemmvorrichtung zum Verstellen der Sitzneigung, insbesondere für Bürostühle |
BE1003611A6 (fr) * | 1991-05-21 | 1992-05-05 | Ashfield Eng Co Wexford Ltd | Mecanisme de basculement pour chaises. |
US5354120A (en) * | 1991-10-31 | 1994-10-11 | Voelkle Rolf | Reclining chair |
US5447357A (en) * | 1992-08-21 | 1995-09-05 | Dauphin Entwicklungs- U. Beteiligungs-Gmbh | Chair with inclinable seat |
US5560682A (en) * | 1992-12-01 | 1996-10-01 | Klasse Pty Ltd | Adjustment mechanism for a chair |
US5676425A (en) * | 1996-03-19 | 1997-10-14 | R.A.M. Machines (1990) Ltd. | Releasable lock forchair control mechanism |
-
2001
- 2001-10-13 DE DE20116683U patent/DE20116683U1/de not_active Expired - Lifetime
-
2002
- 2002-10-14 WO PCT/EP2002/011465 patent/WO2003032779A1/de not_active Application Discontinuation
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2915368A1 (de) * | 1979-04-14 | 1980-10-30 | Link Wilhelm Kg | Buerostuhl |
EP0394784A1 (de) * | 1989-04-27 | 1990-10-31 | Lineager S.R.L. | Klemmvorrichtung zum Verstellen der Sitzneigung, insbesondere für Bürostühle |
BE1003611A6 (fr) * | 1991-05-21 | 1992-05-05 | Ashfield Eng Co Wexford Ltd | Mecanisme de basculement pour chaises. |
US5354120A (en) * | 1991-10-31 | 1994-10-11 | Voelkle Rolf | Reclining chair |
US5447357A (en) * | 1992-08-21 | 1995-09-05 | Dauphin Entwicklungs- U. Beteiligungs-Gmbh | Chair with inclinable seat |
US5560682A (en) * | 1992-12-01 | 1996-10-01 | Klasse Pty Ltd | Adjustment mechanism for a chair |
US5676425A (en) * | 1996-03-19 | 1997-10-14 | R.A.M. Machines (1990) Ltd. | Releasable lock forchair control mechanism |
Also Published As
Publication number | Publication date |
---|---|
DE20116683U1 (de) | 2002-01-24 |
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