EP0004875B1 - Dispositif de réglage en hauteur pour un meuble, en particulier une table - Google Patents

Dispositif de réglage en hauteur pour un meuble, en particulier une table Download PDF

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Publication number
EP0004875B1
EP0004875B1 EP79100844A EP79100844A EP0004875B1 EP 0004875 B1 EP0004875 B1 EP 0004875B1 EP 79100844 A EP79100844 A EP 79100844A EP 79100844 A EP79100844 A EP 79100844A EP 0004875 B1 EP0004875 B1 EP 0004875B1
Authority
EP
European Patent Office
Prior art keywords
spindle drive
furniture
piece
shaft
acts
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
EP79100844A
Other languages
German (de)
English (en)
Other versions
EP0004875A2 (fr
EP0004875A3 (en
Inventor
Rudolf Ing. Schmeykal
Hermann Ing. Döinghaus
Rolf Paland
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.)
Wincor Nixdorf International GmbH
Nixdorf Computer AG
Original Assignee
Nixdorf Computer AG
Siemens Nixdorf Informationssysteme AG
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 Nixdorf Computer AG, Siemens Nixdorf Informationssysteme AG filed Critical Nixdorf Computer AG
Publication of EP0004875A2 publication Critical patent/EP0004875A2/fr
Publication of EP0004875A3 publication Critical patent/EP0004875A3/xx
Application granted granted Critical
Publication of EP0004875B1 publication Critical patent/EP0004875B1/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
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B9/00—Tables with tops of variable height
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
    • A47B2200/00—General construction of tables or desks
    • A47B2200/0035—Tables or desks with features relating to adjustability or folding
    • A47B2200/005—Leg adjustment
    • A47B2200/0056—Leg adjustment with a motor, e.g. an electric motor

Definitions

  • the invention relates to a lifting and lowering device for a piece of furniture, in particular a table, with a spindle drive which acts on a part of the piece of furniture which is guided in a manner such that it can be raised and lowered relative to a fixed part, the part which can be raised and lowered in a parallel guide by means of spaced vertical ones Racks is guided by pinions fixed on a common, fixed shaft.
  • Lifting and lowering devices of this type enable furniture to be adjusted to different heights. This is of particular importance for work tables, the height of which has to be adapted to the seat height or body size of a working person.
  • lifting and lowering devices are known which work according to various possible principles, but have the disadvantage that they have to be complicated and thus expensive to guide the lifting and lowering part of the piece of furniture on the fixed part without tilting.
  • tension elements for example wire cables.
  • lever and hinge devices are also of relatively complicated construction and, particularly when arranged at spaced locations, cause a great deal of effort.
  • a device of the type mentioned is designed to solve this problem according to the invention in such a way that the spindle drive has a push rod which acts via an elastic pressure plunger from below on the liftable and lowerable part of the piece of furniture directly, without coupling to the parallel guide.
  • This device is extremely simple and, as will be shown, can be constructed so that it can also be retrofitted to furniture.
  • a spindle drive acting directly on the liftable and lowerable part and on the other hand a guide of the liftable and lowerable part on the fixed part is provided, which ensures a non-positive connection of the racks with each other via the fixed shaft, canting at the Lifting and lowering movements excluded.
  • the spindle drive ensures a very fine mode of operation, and only a small amount of force is required to actuate it, so that, for example, a comparatively small electric motor can be used for this purpose.
  • the device can advantageously be further developed in such a way that a guide frame is provided, each of which has a rack-containing telescopic devices, the fixed telescopic parts of which are connected by a horizontal and parallel to the shaft arranged transverse rail.
  • This design results in a very rigid guide structure, which can be retrofitted as a unit to a piece of furniture, for example on the underside of a table.
  • the two telescopic devices can form table legs or can also be attached to side surfaces or table legs.
  • the cross rail increases the stability of the piece of furniture significantly, so that the tilt-free guidance of the liftable and lowerable part is also improved.
  • the spindle drive can be attached to the cross rail in a simple manner in the last-described development, so that it is included in the lifting and lowering unit.
  • a work table 10 for example a laboratory table or other equipment table, is shown in a front view, which essentially comprises a table plate 11 which can be raised and lowered, and fixed side parts 12 and 13 which are rigidly connected to one another, for example, by a vertical back plate 14 are.
  • the work table 10 contains below the table top 11 a lifting and lowering device which comprises a spindle drive 15, a stationary shaft 16 and two telescopic devices 17 and 18 which are non-positively coupled to this shaft 16.
  • the telescopic devices 17 and 18 are connected to the side parts 12 and 13 or fastened to lower cross members 19 and 20 mounted on the side parts 12 and 13.
  • the movable elements 21 and 22 of the telescopic devices 17 and 18 are attached to the underside of the table top 11, so that they guide the table top 11 during its lifting and lowering movement in the fixed parts of the telescopic devices 17 and 18. During this movement, tilting of the movable elements 21 and 22 in the telescopic devices 17 and 18 is avoided in that the movable elements 21 and 22 are provided with toothed racks, not shown, which are each guided by a pinion, which is fixed on the shaft 16 . In this way, there is a non-positive coupling of the two movable elements 21 and 22, which in each case ensures corresponding movement lengths during the telescopic movement and thereby makes canting impossible.
  • the spindle drive 15 comprises an electric motor 25 which can be reversed with respect to its direction of rotation and which actuates a vertically arranged rotating spindle. This is guided in a sleeve 26 provided in the spindle drive 15 and, by means of its rotary movement, causes a pressure stamp 27 on a push rod 28 to be moved more or less far out of the spindle drive 15 or into it.
  • the plunger 27 can be made of rubber or an elastic plastic, for example, and acts on the table top 11 from below, so that it lifts it or, when inserted into the spindle drive 15, causes it to lower due to its own weight.
  • the spindle drive 15 is mounted on a cross rail 30 which rigidly connects the two telescopic devices 17 and 18 to one another.
  • the spindle drive, the telescopic devices 17 and 18 and the cross rail 30 form a unit that can be mounted on the table 10 in a very simple manner from below.
  • the telescopic devices 17 and 18 are only to be connected to the side parts 12 and 13 of the work table 10, and the movable elements 21 and 22 must be attached to the table top 11.
  • comparatively weak fastening elements are sufficient, because there is no significant power transmission via the movable elements 21 and 22, but rather they serve above all for tilt-free guidance by means of the non-positive coupling realized via the shaft 16.
  • the driving force for the lifting movement is transmitted primarily via the pressure stamp 27 to the table top 11.
  • Fig. 1 is also a connecting cable 40 with a connector 41 for the power supply of the electric motor 25 is shown.
  • an actuation switch 42 can be seen, which is connected to the electric motor 25 via a connecting cable 43 and, with two different switching positions, enables actuation of the electric motor 25 as a function of the direction of rotation.
  • FIG. 2 shows a sectional view of the lifting and lowering device according to the viewing direction II indicated in FIG. 1.
  • the work table 10 is shown for an uppermost position of the table top 11, the lowest limit position is indicated by dash-dotted lines.
  • the view of the side part 13 shows the telescopic device 17 attached to it and the fastening of the spindle drive 15 by means of two holding elements 31 and 32, which can be, for example, extended tabs of an assembly support 33.
  • the tab 31 surrounds the Zluerscniene 30, which has a U-profile and surrounds the shaft 16. It can also be seen that the telescopic device 17 is connected to the side part 13 of the work table 10 on a lower cross member 19.
  • the actuation switch 42 for the electric motor 25 of the spindle drive 15 is arranged on the underside of the table top 11 facing a working person near the front edge and is designed as a rocker switch. It enables the spindle drive 15 to be conveniently switched on and off in one or the other possible direction of rotation and thus a very precise adjustment of the height of the table top 11 to the respective requirements.
  • the telescopic devices 17 and 18 can be designed in the form of square tubes which are guided into one another. This brings a further improvement in the tilt-free guidance of the table top 11 on the fixed side parts 12 and 13 of the table 10.
  • FIG. 3 shows a detail of the lifting and lowering device in accordance with the dash-dotted line in FIG. 1 for better illustration of the guidance of the toothed racks already mentioned, each on a pinion which is fastened on the shaft 16.
  • the corresponding part of the lifting device shown in FIG. and the lowering device is shown partially broken, so that the coupling of a pinion 35 arranged on the shaft 16 with a rack 36 can be seen, which is firmly connected to the movable element 21 of the telescopic device 17.
  • This is the arrangement provided on the side part 13 of the work table 10.
  • Fig. 1 shows that a similar unit G is also provided on the side part 12 of the work table 10.
  • the pinion 35 is fixed to the shaft 16. This is arranged in a bearing 37, which is shown in FIG. 3 as a simple sleeve and is firmly connected to the cross rail 30.
  • the movable element 21 is displaceably guided in the telescopic device 17 in the vertical direction and is provided on its side facing the shaft 16 with a slot, not shown in FIG. 3, which enables movement relative to the shaft 16.
  • an arrangement G is provided which is analogous to the arrangement of pinions 35 and.
  • Rack 36 is formed, the two with the movable elements 21 and 22 of the telescopic devices 17 and 18 racks firmly connected to each other via the shaft 16 so that exactly matching lifting and lowering movements of the movable elements 21 and 22 are ensured when the Stamp 27 acts on the push rod 28 on the table top 11 or is removed from its underside.
  • the result is a completely trouble-free, low-noise and extremely precise operation of the lifting and lowering device, which is also extremely simple. There are no special requirements with regard to precise installation to be taken into account, and the location at which the pressure stamp 27 acts on the table top 11 is completely uncritical.
  • the pressure stamp 27 it is possible to arrange the pressure stamp 27 not on the middle but on one side of the piece of furniture, so that, for example, the legroom underneath the table top is not disturbed on a table.
  • the lifting and lowering device according to the invention thus enables trouble-free guidance of the part moved relative to the fixed part despite the asymmetrical force.
  • a device according to the invention can be used wherever the most precise and sensitive way of working is important. For example, use in height-adjustable chairs is also conceivable.

Landscapes

  • Tables And Desks Characterized By Structural Shape (AREA)

Claims (8)

1. Dispositif pour lever et abaisser un meuble, en particulier une table, comprenant un mécanisme (15) à broche, qui agit sur une partie guidée (11) du meuble guidée à l'élévation et à l'abaissement par rapport à une partie (12, 13) fixe, l'élément (11) levable et abaissable étant guidé dans un guidage parai- lèle (17, 21; 18, 22), grâce à des crémaillères (36) verticales distantes l'une de l'autre, par des pignons (35) fixés sur un arbre (16) commun, . fixe en position, caractérisé en ce que le mécanisme à broche (15) comprend une tige de poussée (28) qui agit par en dessous directement, c'est-à-dire sans accouplement avec le guidage parallèle (17, 21, 18, 22), par l'intermédiaire d'un tampon de pression (27) élastique sur la partie (11) levable et abaissable du meuble (10).
2. Dispositif selon la revendication 1, caractérisé en ce qu'est prévu un cadre de guidage (17, 18, 30) qui comprend des dispositifs télescopiques (17, 21; 18, 22) équipés chacun d'une crémaillère (36), et dont les parties télescopiques (17, 18) fixes en position sont reliées par un longeron transversal (30) horizontal et parallèle à l'arbre (16).
3. Dispositif selon la revendication 2, caractérisé en ce que le mécanisme à broche (15) est fixé sur le longeron transversal (30).
4. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le mécanisme à broche (15) comprend, en tant que dispositif de commande, un moteur électrique (25) à deux sens de marche.
5. Dispositif selon l'une quelconque des revendications 2 à 4, caractérisé en ce que le longeron transversal (30) présente un profil en U et en ce qu'il entoure l'arbre (16).
6. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le tampon de pression (27) agit sur la face inférieure du plateau (11) d'une table de travail (10) levable et abaissable par rapport à des parties latérales (12, 13) fixes en position.
7. Dispositif selon la revendication 6, caractérisé en ce que les parties fixes en position (17, 18) des dispositifs télescopiques (17, 18; 21, 22) sont montés sur les parties latérales (12, 13) de la table de travail (10).
8. Dispositif selon la revendication 7, caractérisé en ce que le mécanisme à broche (15) est monté à proximité d'une partie latérale (13), en dessous du plateau (11) de la table de travail (10).
EP79100844A 1978-04-18 1979-03-20 Dispositif de réglage en hauteur pour un meuble, en particulier une table Expired EP0004875B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19782816849 DE2816849A1 (de) 1978-04-18 1978-04-18 Hebe- und senkvorrichtung fuer ein moebelstueck, insbesondere einen tisch
DE2816849 1978-04-18

Publications (3)

Publication Number Publication Date
EP0004875A2 EP0004875A2 (fr) 1979-10-31
EP0004875A3 EP0004875A3 (en) 1979-11-14
EP0004875B1 true EP0004875B1 (fr) 1981-05-13

Family

ID=6037328

Family Applications (1)

Application Number Title Priority Date Filing Date
EP79100844A Expired EP0004875B1 (fr) 1978-04-18 1979-03-20 Dispositif de réglage en hauteur pour un meuble, en particulier une table

Country Status (2)

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EP (1) EP0004875B1 (fr)
DE (2) DE2816849A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0074019A3 (fr) * 1981-09-04 1985-11-06 Asea Ab Pupitre de contrôle
CN105725572A (zh) * 2016-03-03 2016-07-06 祁旭东 一种支架
US10034538B1 (en) * 2017-05-05 2018-07-31 Sauder Woodworking Co. Height-adjustable work surface assembly

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE508600C (de) * 1929-04-19 1930-09-29 Arno Doerr Als Fachgestell verwendbarer Tisch
DE930542C (de) * 1949-06-26 1955-07-18 Friedrich Moerschner Gebrauchsmoebel, insbesondere Tische und Stuehle bzw. Polstersessel
SE360634B (fr) * 1972-02-24 1973-10-01 Linden Alimak Ab

Also Published As

Publication number Publication date
EP0004875A2 (fr) 1979-10-31
DE2816849A1 (de) 1979-10-25
DE2960337D1 (en) 1981-08-20
EP0004875A3 (en) 1979-11-14

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