EP0151899B1 - Support à colonne - Google Patents

Support à colonne Download PDF

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Publication number
EP0151899B1
EP0151899B1 EP84710007A EP84710007A EP0151899B1 EP 0151899 B1 EP0151899 B1 EP 0151899B1 EP 84710007 A EP84710007 A EP 84710007A EP 84710007 A EP84710007 A EP 84710007A EP 0151899 B1 EP0151899 B1 EP 0151899B1
Authority
EP
European Patent Office
Prior art keywords
catch
segments
spring
tapered
locking
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
EP84710007A
Other languages
German (de)
English (en)
Other versions
EP0151899A1 (fr
Inventor
Horst Ziegler
Manfred Flum
Manfred Schlegel
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.)
Christof Stoll GmbH and Co KG
Original Assignee
Christof Stoll 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 Christof Stoll GmbH and Co KG filed Critical Christof Stoll GmbH and Co KG
Priority to AT84710007T priority Critical patent/ATE29371T1/de
Priority to DE8460015U priority patent/DE8460015U1/de
Priority to EP84710007A priority patent/EP0151899B1/fr
Priority to DE8484710007T priority patent/DE3465873D1/de
Publication of EP0151899A1 publication Critical patent/EP0151899A1/fr
Application granted granted Critical
Publication of EP0151899B1 publication Critical patent/EP0151899B1/fr
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
    • A47C3/00—Chairs characterised by structural features; Chairs or stools with rotatable or vertically-adjustable seats
    • A47C3/20—Chairs or stools with vertically-adjustable seats
    • A47C3/28—Chairs or stools with vertically-adjustable seats with clamps acting on vertical rods
    • A47C3/285—Chairs or stools with vertically-adjustable seats with clamps acting on vertical rods with radially expansible clamping elements telescopically engaged in a tube or the like

Definitions

  • the invention relates to a height-adjustable column for seating furniture according to the preamble of claim 1.
  • Such a pedestal is known from GB-A-935958.
  • the standing column shown there is intended for tables, seats and the like, and has an inner spindle tube that can be moved telescopically in an outer composite guide tube.
  • the spindle tube runs out into a cone at the bottom, which engages in locking segments that form a double cone on their inner surface and are held together by an elastic ring.
  • a conical component is arranged, which can be moved up and down by means of a mechanism from the outside relative to the spindle tube.
  • the conical component and the conical end of the spindle tube are drawn into the double cone by the force of a spring, and the locking segments are thus pressed against the inner wall of the spindle tube.
  • the height adjustment of the pedestal is locked by a toothing on the outer surface of the locking segments and the inner surface of the guide tube. Unlocking takes place by moving the conical component downwards.
  • the pedestal shown there has a spindle tube carrying the seat support, which can be displaced telescopically in a guide tube.
  • the guide tube is made corrugated, so that there are grooves arranged in an axial sequence.
  • the spindle tube ends in a cone. This cone enters the recess of a spreading device which has a base from which fingers extend upwards which end in circumferential thickenings.
  • the spreader is made of elastic material, e.g. B. nylon.
  • the inner recess has a conical surface.
  • the spreading device In the rest position, the spreading device is pulled upwards onto the cone by a spring, which is supported on a disk which is firmly seated in the cone of the spindle tube, and is thus spread.
  • the thickenings then lie in the grooves of the guide tube and block the height adjustment of the pedestal.
  • An operating lever is moved down to change the height.
  • the expansion device is pulled off the cone of the spindle tube and closes. The thickenings then emerge from the grooves and the height of the column can be adjusted.
  • a number of locking mechanisms are used, in which a locking lever or similar locking part is mounted in the inner bore of the inner telescopic tube.
  • This locking lever engages through the wall of the inner telescopic tube in bores that are step-like in the wall of the outer telescopic tube.
  • System-related disadvantage is that both pipes must be constantly connected to each other so that they can not rotate radially against each other when the lock is released and z. B. the chair top is rotated.
  • Another disadvantage is that the gradations can not be made fine enough. The necessary thickness of the locking lever and the necessary hole spacing prevent this.
  • the height adjustment should be as fine as possible and be able to be carried out in a sitting position, and the pillar in the sense of a modular system should be able to be equipped with compensation springs in a simple manner depending on the customer's request or not. This results in important production advantages. If the compensating spring is missing or defective, there must be a safeguard against sudden sagging when the lock is accidentally unlocked.
  • the locking element encircling the latching segments which is preferably an annular spring (hereinafter briefly: ring spring), can be easily engaged or disengaged in the grooves of the guide tube by moving the latching cone up or down.
  • annular spring hereinafter briefly: ring spring
  • the spindle and guide tube In the locked state, a positive connection is thus created between the spindle and guide tube, which results in far lower surface pressure even under extreme seat loads than, for example, in the known spherical locking elements.
  • Relatively modest spring cross-sections and thus also groove cross-sections can thus be provided, as a result of which the grooves can then be arranged at a short distance, and thus a previously unattainable fine step of the adjustment is achieved.
  • the annular spring which provides the positive locking and thus the height locking also fulfills the function of exerting a contracting force on the locking segments, counter to the expansion effect of the locking cone, which is a great advantage in terms of production technology and costs. If, instead of the circumferential ring spring, a nose formed on the detent segments is provided, the contracting force is omitted, but a part is saved during manufacture.
  • the stand column according to the invention is not only inexpensive to manufacture and also easy to maintain, but can also be designed in different variants.
  • the locking cone for unlocking is pressed down out of the locking segments and, in the variant according to claim 3, is pulled into the locking segments for unlocking.
  • the former variant is more suitable for certain seating furniture models because an operating lever that is subjected to tension is less easy to accommodate in tight spaces under the seat.
  • both variants can be equipped in a simple manner both with compression springs and with non-lockable gas springs as compensation springs against the upper part weight, which the price of the seating furniture increases, but also the user comfort.
  • two telescoping tubes are arranged to be longitudinally displaceable in a manner known per se. Since the column should be rotatable, a round tube is preferably used.
  • the other corresponding parts are, as usual, rotationally symmetrical.
  • the spindle tube 7 is firmly connected to a seat support 30, which carries the chair or armchair upper part, for. B. welded.
  • a seat support 30 which carries the chair or armchair upper part, for. B. welded.
  • this seat support 30 there is in a known manner an actuating lever 24 which, when pulled upwards at the outer end, exerts a force in the center of the column, the so-called release force.
  • the actuating lever is rotatably connected to the seat support 30 by a secured bearing pin 26.
  • concentrically acting detent segments 1 are arranged at the lower end of the spindle tube 7, each pivotably mounted in an opening 33 of the spindle tube 7. It can be two, preferably three, but also more. 1 to 5, the detent segments 1 are enclosed at the free end by an annular spring element, an annular spring 12, which is embedded and held on the outside in a circumferential groove 31 of the detent segments 1, so that a considerable part of the cross section of the annular spring 12, about half, lies in the groove 31.
  • the ring spring 12 can be a spiral spring, which is closed at the end, or a round or square spring ring which is open at the end. It engages with its outside in grooves 32 of corresponding cross-section, which are introduced one above the other in the ring, in the guide tube 6 and thus brings about a form-fitting connection between the telescoping guide and spindle tube.
  • the openings 33 for the retaining lugs 21 of the locking segments 1 are chosen such that the lower edge of the spindle tube 7 transfers the user load to the correspondingly shaped locking segments 1, so that the largest possible contact area also results in a low surface pressure.
  • the ring spring 12 is designed such that the locking segments 1 are pulled together in the unlocked state until they abut each other. In the locked state, this is prevented by the locking cone 5.
  • This can advantageously be produced inexpensively as a rotationally symmetrical part, for. B. on automatic lathes. It is conical in the section which is adjacent to the locking segments 1, the cone inclination advantageously being in the area of self-locking, that is to say 5 ° to 10 °.
  • the inner part of the locking segments 1 is partially of the same conical design, advantageously the one that is approximately opposite the ring spring 12.
  • the annular spring 12 engages in the grooves 32 of the guide tube 6 only with a part of its cross section, which in the best case is almost half the diameter, but can be smaller for tolerance and other reasons. Reliable positive locking is always achieved, however, a round cross-section of the ring spring causes a force decomposition from the acting force to the center of the chair column.
  • the locking segments 1 have a molded nose 12 'instead of a circumferential ring spring.
  • Nose 12 'and groove 32 have bevels at the top and preferably also at the bottom.
  • the nose and thus the locking segments 1 are pressed out of the groove 32 when the locking segments 1 move up and down in the unlocked state.
  • the contraction effect of the ring spring 12 is eliminated, but a separate component is advantageously saved for the production.
  • the locking spring 17 pulls the locking cone 5 between the locking segments 1 upward, so that they are reliably spread outwards due to the reinforcing effect of the cone and remain. If the cone angle is below the friction angle, then there is a reliable self-locking when locked.
  • the locking cone 5 is fixedly connected at its upper end to the locking spring sleeve 8, for. B. via a circumferential groove.
  • the detent spring sleeve 8 is of the spring washer 2, the down in the spindle tube 7, z. B. rests on pronounced knobs, guided centrally from the lower end.
  • the detent spring 17 rests on the bottom of the spring support disc 2 and exerts a prestressed constant pressure against the flange of the detent spring sleeve 8 lying above, and thus causes the detent cone 5 to be pulled upwards and causes a lock.
  • the locking spring sleeve is designed like a bush over the flange. The pressure sleeve 13 is inserted into this socket.
  • the pressure plug 4 can be made of metal or plastic and can be produced inexpensively as a molded plastic part.
  • the upper locking clip 10 forms the upper stop of the pressure sleeve 13. It causes, via the locking spring sleeve 8, that the locking spring 17 is always held under prestress.
  • the actuating lever 24 is raised on the outside, as a result of which the pressure plug 4 is pressed downward. This movement is transmitted via the pressure sleeve 13 and the locking spring sleeve 8 to the locking cone 5 against the force of the locking spring 17.
  • the locking cone 5 then clears the way centrally, so that the locking segments 1 are drawn together by the ring spring 12.
  • the locking between guide tube 6 and spindle tube 7 is released.
  • the top can be raised or lowered. It can be rotated in relation to the lower part. If the actuating lever 24 is released, the locking segments 1 are again spread outwards by the locking cone 5.
  • Spindle tube 7 and guide tube 6 automatically lock themselves at the selected height in the closest groove 32 of the guide tube 6.
  • the ring spring 12 can be kept small with a diameter of approximately 2 to 4 mm, the distances between the individual grooves 32 in the guide tube 6 can also be kept so small that they reach the limit of human discriminative power and the height adjustment equals a stepless adjustment, as is known from lockable gas springs, but without their disadvantages.
  • the height stop rod 16 is provided.
  • Pressure sleeve 13 and detent spring sleeve 8 are hollow according to the invention, likewise cer locking cone 5.
  • the height stop rod 16 between the guide tube 6 below and the spindle tube 7 as a centrally arranged rod and as an easy-to-produce part made of round material, for. B. steel.
  • the height stop rod 16 is firmly connected to the guide tube 6 at the bottom via the lower locking clip 11 and the cross bolt 15 held in two opposite bores.
  • the upper end of the height stop rod 16 carries a locking washer 28 or another stationary part, which limits the path of the spindle tube 7 upwards when it comes to rest on the detent spring sleeve 8 or a height stop disc 3 placed thereon.
  • an upper part weight compensation spring 9 or 35 can also be provided in the space left inside by the pressure sleeve 13 or the locking spring sleeve 8 and the locking cone 5. This is shown in Figs. 2 and 3. This can be both a non-blocking, simple gas spring 9 as in Fig. 3, and a compression spring 35, for. B. act from spring steel wire, as in Fig. 2.
  • the spring 9 or 35 acts at the upper end on the upper locking clip 10, which is firmly connected to the spindle tube 7.
  • the compression spring 35 acts on the locking washer 28 of the height stop rod 16, which in turn is supported on the cross bolt 15.
  • the lower locking clip 11 holds both the piston rod 14 of the gas spring 9 and the lower end of the height stop bar 16 of the same shape in position. Because of the flat spring detection, based on the constant top weight, the simple and relatively inexpensive Gas spring 9 preferred. Since it has an end stop when fully extended, no height stop is required in this case.
  • the remaining height adjustment mechanism according to the invention always has its entire remaining function - that of a mechanism without upper part weight compensation - like it is intended for the simpler and lighter chairs.
  • the claim is made to offer less or greater comfort (upper part weight compensation) only by adding or omitting parts. All other parts remain the same as a modular system.
  • the stand column according to the invention is extremely advantageous: all parts of the mechanics are only plugged together. This enables them to be installed quickly and inexpensively.
  • the lower locking clip 11 and upper locking clip 10 which are advantageously made of spring steel and are connected at the bottom on the cross bolt 15, or snap firmly into the corresponding holes in the spindle tube 7 at the top. They in turn have resilient retaining tongues which receive the appropriately designed ends of the gas springs 9 or the height stop rod 16.
  • the detent spring sleeve 8 has no forces to absorb the seat load or from the weight compensation spring 9 or 35. Not least because of this, it can be designed very advantageously as an inexpensive plastic injection-molded part.
  • the user can sag down with the upper part of the chair if he accidentally triggers the release. Although it is caught by the central seat spring 23, the uncertainty remains. If the ring spring 12 is designed with a rectangular cross-section, this is prevented because the static friction between the spring and the lower surface of the groove 32 of the guide tube 6 is greater than the concentric unlocking force of the spring when the user weight acts.
  • the lower edge of the spindle tube 7 can be made at an angle obliquely upwards from the inside to the outside.
  • the corresponding recess of the locking segments 1 is also carried out.
  • FIG. 5 shows an undercut that is even more pronounced than in FIG. 4.
  • the locking cone 5 ' acts at the lower end of the locking segments 1'.
  • a disk 36 which is secured against falling out. It prevents the locking segments 1 'from being able to move inwards at this point, but otherwise gives them a certain possibility of movement.
  • the locking between the locking segment 1 'and the guide tube 6 takes place in the manner described.
  • the locking segments 1 ' have the molded-on counter-cone against the locking cone 5', which acts in reverse from top to bottom. The distances mentioned can behave like 1: 1.
  • the locking cone 5 ' is pressed down by the locking spring 17', which acts between the disk 36 and the upper surface of the locking cone 5 '.
  • the pretensioning of the ring spring 12 has the effect in the manner described that the locking is released.
  • the train takes place via the pull sleeve 37, which is fixed with the locking cone 5 ', for. B. is connected by gluing or soldering and consists of a tube which is somewhat crimped at the lower end.
  • the height stop rod 16 which is made of thin round material, for. B. wire can be made. It has a thickening at the upper end, similar to a nail head, and a bent eyelet at the lower end. Through this eyelet, the cross pin 15 'is pushed, which is connected to the guide tube 6 as described.
  • the pull sleeve 37 can be hooked directly into the operating lever 24.
  • the operating lever 24 is mounted in such a way that it executes a movement from the bottom up when it is pulled upwards from the outside. So it works in the same direction.

Landscapes

  • Chairs Characterized By Structure (AREA)
  • Rod-Shaped Construction Members (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Claims (10)

1. Support à colonne réglable en hauteur pour sièges, avec un tube central (7) portant le support de l'assise (30), lequel tube peut coulissertélesco- piquement dans un tube de guidage (6), dans lequel
des segments d'arrêt (1, 1') sont prévus à l'extrémité inférieure du tube central (7),
les segments d'arrêt (1, 1') entourent un cône de blocage (5, 5'),
les segments d'arrêt (1, 1') présentent une surface intérieure conique et/ou le cône de blocage (5, 5') présente une surface extérieure conique,
le cône de blocage (5, 5') glisse par sa surface extérieure sur la surface intérieure des segments d'arrêt (1, 1'),
les segments d'arrêt (1, 1') présentent un élément de retenue (12, 12') qui les entoure,
le tube de guidage (6) présente à sa surface intérieure plusieurs rainures (32) se succédant en direction axiale, destinées à recevoir l'élément de retenue (12, 12'), et
le cône de blocage (5, 5') peut être déplacé de manière autonome vers le haut et vers le bas, à l'intérieur des segments d'arrêt (1, 1'), par l'intermédiaire d'un mécanisme disposé à l'intérieur du tube central (7), contre la force d'un ressort à cran d'arrêt (17, 17'), en manoeuvrant un levier de commande (24) pouvant être actionné de l'extérieur du support à colonne, caractérisé en ce que
les segments d'arrêt (1, 1') sont disposés concentriquement à l'intérieur du tube central (7),
ils sont suspendus, par leur extrémité supérieure, en formant une liaison mécanique articulée, au moyen d'organes de maintien (21) dans des logements (33, 33') ménagés dans ce dernier tube (7),
l'écartement des segments d'arrêt (1, 1') étant assuré par le mouvement du cône de blocage (5, 5') dans la partie inférieure des segments d'arrêt (1, 1'), autour de l'articulation constituée par la suspension des organes de maintien.
2. Support à colonne suivant la revendication 1, caractérisé en ce que l'élément de retenue (12) périphérique est un ressort agissant en anneau, de préférence un anneau élastique de section carrée, ouvert à une extrémité.
3. Support à colonne suivant la revendication 1, caractérisé en ce que l'élément de retenue (12) périphérique est un taquet de forme adaptée aux segments d'arrêt (1) et en ce que le taquet et les rainures (32) destinées à le recevoir présentent des faces supérieures et inférieures obliques, de telle sorte que le taquet soit expulsé hors de la rainure lors d'un mouvement ascendant ou descendant.
4. Support à colonne suivant la revendication 2, caractérisé en ce que le cône de blocage (5) se trouve en liaison mécanique avec une douille (8) d'un ressort à cran d'arrêt et celle-ci avec une douille de pression (13), la douille (8) du ressort à cran d'arrêt subissant une force dirigée vers le haut de la part du ressort à cran d'arrêt (17) prenant appui sur le tube central (7) et la douille de pression (13) étant mobile vers le bas, contre cette force, au moyen d'un levier de commande (24).
5. Support à colonne suivant la revendication 1, caractérisé en ce que les segments d'arrêt (1') présentent intérieurement, dans leur partie supérieure, un organe d'écartement (36), en ce que le-ressort annulaire (12) enserre extérieurement les segments d'arrêt (1') dans leur partie inférieure, en ce que le cône de blocage (5') se trouve en liaison mécanique avec une douille de traction (37) et est situé sous la force dirigée vers le bas exercée par le ressort à cran d'arrêt (17') qui prend appui sur les segments d'arrêt (1') et en ce que la douille de traction (37) est mobile vers le haut, contre cette force, au moyen du levier de commande (24).
6. Support à colonne suivant la revendication 4 ou 5, caractérisé en ce que le cône de blocage (5, 5') ainsi que la douille (8) du ressort à cran d'arrêt et la douille de pression (13), respectivement la douille de traction (37) contiennent intérieurement une barre (16, 16') à butée de hauteur, à l'extrémité supérieure de laquelle il est prévu une butée (28) qui maintient le cône de blocage (5, 5'), et en ce que la barre (16, 16') à butée de hauteur est fixée par son extrémité inférieure au tube de guidage (6).
7. Support à colonne suivant la revendication 6, caractérisé en ce qu'entre la butée (28) et le support de siège (30) il est prévu un ressort comprimé (35) en guise de ressort d'équilibrage du poids de la partie supérieure.
8. Support à colonne suivant la revendication 4 ou 5, caractérisé en ce que le cône de blocage (5, 5') ainsi que la douille (8) du ressort à cran d'arrêt et la douille de pression (13), respectivement la douille de traction (37) contiennent intérieurement un amortisseur à gaz (9, 9') imblocable, dont la tige de piston (14) est fixée à l'extrémité inférieure du tube de guidage (6).
9. Support à colonne suivant l'une quelconque des revendications précédentes, caractérisé en ce que l'angle d'inclinaison des cônes des segments d'arrêt (1, 1') et du cône de blocage (5, 5') est situé dans la gamme de l'auto-blocage, de préférence de 5° à 10°, et/ou en ce que les cônes des segments d'arrêt (1,1') et du cône de blocage (5, 5') se terminent par une portion cylindrique circulaire dans la dernière partie de la course de verrouillage.
10. Support à colonne suivant l'une quelconque des revendications précédentes, caractérisé en ce que les segments d'arrêt (1,1') sont suspendus par des taquets de support (21) dans des ouvertures (33) ménagées à l'extrémité inférieure du tube central (7), et en ce que les ouvertures (33) sont réalisées de telle façon qu'en position verrouillée, le tube central (7) prend appui par son bord le plus inférieur sur les segments d'arrêt (1, 1') et que ce bord forme une contre-dépouille avec le segment d'arrêt (1, 1').
EP84710007A 1984-02-08 1984-02-08 Support à colonne Expired EP0151899B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
AT84710007T ATE29371T1 (de) 1984-02-08 1984-02-08 Standsaeule.
DE8460015U DE8460015U1 (de) 1984-02-08 1984-02-08 Standsäule
EP84710007A EP0151899B1 (fr) 1984-02-08 1984-02-08 Support à colonne
DE8484710007T DE3465873D1 (en) 1984-02-08 1984-02-08 Supporting column

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8460015U DE8460015U1 (de) 1984-02-08 1984-02-08 Standsäule
EP84710007A EP0151899B1 (fr) 1984-02-08 1984-02-08 Support à colonne

Publications (2)

Publication Number Publication Date
EP0151899A1 EP0151899A1 (fr) 1985-08-21
EP0151899B1 true EP0151899B1 (fr) 1987-09-09

Family

ID=45541137

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84710007A Expired EP0151899B1 (fr) 1984-02-08 1984-02-08 Support à colonne

Country Status (3)

Country Link
EP (1) EP0151899B1 (fr)
AT (1) ATE29371T1 (fr)
DE (2) DE3465873D1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1600082A1 (fr) 2004-05-28 2005-11-30 Sedus Stoll AG Colonne pour chaise réglable en hauteur en continu

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN116641939B (zh) * 2023-06-15 2024-03-08 中国人民解放军海军工程大学 一种油缸缓冲机构

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1247032A (fr) * 1960-01-05 1960-10-17 Applic Ind Tube Système pour le réglage et l'immobilisation de supports télescopiques de tables, sièges et autres
DE1189687B (de) * 1960-04-29 1965-03-25 Mauser Kg Hoehenverstellbarer Drehstuhl mit innerhalb des Standrohres angeordneter Klemmsperre
AU490518B1 (en) * 1975-01-29 1977-08-04 Sebel Limited Furniture having parts linearly adjustable

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1600082A1 (fr) 2004-05-28 2005-11-30 Sedus Stoll AG Colonne pour chaise réglable en hauteur en continu
DE102004026677A1 (de) * 2004-05-28 2005-12-15 Sedus Stoll Ag Stufenlos höhenverstellbare Standsäule

Also Published As

Publication number Publication date
DE8460015U1 (de) 1985-11-28
DE3465873D1 (en) 1987-10-15
EP0151899A1 (fr) 1985-08-21
ATE29371T1 (de) 1987-09-15

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