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EP0106388B1 - Locking device for a drawing board - Google Patents

Locking device for a drawing board Download PDF

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Publication number
EP0106388B1
EP0106388B1 EP83201326A EP83201326A EP0106388B1 EP 0106388 B1 EP0106388 B1 EP 0106388B1 EP 83201326 A EP83201326 A EP 83201326A EP 83201326 A EP83201326 A EP 83201326A EP 0106388 B1 EP0106388 B1 EP 0106388B1
Authority
EP
European Patent Office
Prior art keywords
frame
jaws
brake
clamping
column
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
EP83201326A
Other languages
German (de)
French (fr)
Other versions
EP0106388A1 (en
Inventor
Alain Bruneau
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.)
Alpia SA
Original Assignee
Alpia SA
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 Alpia SA filed Critical Alpia SA
Publication of EP0106388A1 publication Critical patent/EP0106388A1/en
Application granted granted Critical
Publication of EP0106388B1 publication Critical patent/EP0106388B1/en
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
    • A47B27/00—Drawing desks or tables; Carriers for drawing-boards
    • A47B27/14—Adjustable underframes

Definitions

  • Locking device for a drawing table mainly composed of a fixed work surface on a mobile column sliding vertically in a frame resting on the ground by a base, the weight of the mobile assembly being compensated by a balancing device disposed between the frame and the work surface, the movable column being cylindrical, a brake, integral with the frame, controlled by a pedal external to the frame, enclosing the cylindrical column in order to immobilize it in height and in rotation inside the built.
  • Known locking devices are, in general, composed by self-tightening systems with cam or rods used on rectangular mobile columns.
  • Document DE-B-1 220 570 describes a device for blocking a drawing table comprising a brake secured to the frame and consisting of a metal strip 5 enclosing the cylindrical column 2 supporting the work surface.
  • the strip 5 is fixed by one of its ends to a stud 6 of a ring 4 resting on an internal rib of the frame 1, the other end of the strip 4 being connected to the resistant arm of a lever 7, at - above a support point 8.
  • this brake is obtained by applying the active force of the lever 7 by means of a rod 9 so that it pivots around the fulcrum 8.
  • the problem which the invention proposes to solve is, in a device for blocking a drawing table in accordance with the preamble of claim 1, that posed by the alignment and the adjustment of the brake application on the movable column.
  • the brake according to the invention consists of two jaws integral with the frame, one of the jaws is connected to a fixed point on the frame by a bolt, adjustable in position in an orifice oblong perpendicular to the clamping direction of the jaws, ensuring the alignment of the brake on the column, the other jaw is made integral with the first jaw by a yoke, adjustable parallel to the clamping direction of the jaws, which allows to bring closer or move the two jaws away, and thus adjust the brake application on the movable column, the two adjustment devices being arranged on the side opposite to that on which the clamping mechanism acts.
  • each of the connecting rods is connected to a single plate by a pivot, the other end of each connecting rod being connected to the end of a brake shoe.
  • This single plate is suspended from the frame by the springs which are hung on one side on the pins of the frame and on the other side on the plate by holes, springs thus exerting a traction force on said plate so that either permanently secured the brake on the mobile column.
  • the movable plate is connected to the external pedal to the frame by at least one rod, located inside the frame, which controls the movements of said plate allowing, by the action of the connecting rods on the brake shoes, the momentary release of these and the change of position of the work plan.
  • FIG. 1 represents an overall view of a drawing table mainly composed of a frame 1, provided with a base 2, in which slides a column 3 supporting a work surface 4 by means of a fitting Orientation 5.
  • a weight balancing device is shown in dotted lines, for the record.
  • the arrows a, b, c indicate the three orientations that can be given to work plan 4.
  • FIGS. 2 and 3 represent the device which consists of a brake 7 composed of two semi-circular jaws 70, 71, optionally provided with fittings, adapted to the external shape of the column 3.
  • the jaws 70, 71 bear on the frame 1, on one side by a hinge 701 on a fixed point 100 of said frame arranged so that it allows, while supporting them, the spacing of the brake shoes 7.
  • the jaw 70 carries on one of its ends 700 the articulation 701 constituted by an oblong orifice 702 through which a bolt 703 passes which keeps it on the fixed point 100.
  • the jaw 71 carries at the corresponding end 710 an adjustable yoke 711 allowing bring the two jaws closer together or farther apart and adjust the tightening on the column 3. Perfect alignment of the brake 7 on the column 3 is ensured by the positioning of the bolt 703 in the oblong opening 702 of the fixed point 100.
  • the opposite ends 704 and 712 of the jaws 70 and 71 rest freely on the step 101 and slide on this support when they are spaced from each other by a pressure P exerted on the pedal 6.
  • FIG. 4 shows the brake control means 7 constituted by a plate 8 suspended by two springs 9 hooked on one side to pins 102 of the frame, on the other on plate 8 by holes 80 thereby exerting a tensile force F on said plate.
  • Said plate 8 thus suspended, comprises connecting elements with the jaws 70, 71 constituted by two connecting rods 81, 82 mounted, each on two pivots, some 83, 84 placed perpendicularly to the plane of the plate 8, the others 705, 713 embedded in the ends 704,712 of the jaws 70, 71.
  • the plate 8 is pierced with two holes 85, 86 through which pass the curved ends 11 of two rods 10 connected to the pedal 6 and held in place by washers and / or pins.
  • FIG. 5 shows the whole of the locking device, in place inside the frame, with the exception of the fixed points 100 and 101 of the frame 1 on which it rests.
  • the plate 8 controls the opening of the shoes 70, 71 of the brake 7 by means of the connecting rods 81, 82.
  • a device for balancing the weights of the work surface and the drawing apparatuses as described in the document FR-A -2 448317 prevents any sudden descent of the latter when pressure P is applied to pedal 6.

Landscapes

  • Bending Of Plates, Rods, And Pipes (AREA)
  • Braking Arrangements (AREA)

Description

Dispositif de blocage d'une table à dessin composée principalement d'un plan de travail fixe sur une colonne mobile coulissant verticalement dans un bâti reposant sur le sol par une embase, le poids de l'ensemble mobile étant compensé par un dispositif d'équilibrage disposé entre le bâti et le plan de travail, la colonne mobile étant cylindrique, un frein, solidaire du bâti, commandé par une pédale extérieure au bâti, enserrant la colonne cylindrique afin de l'immobiliser en hauteur et en rotation à l'intérieur du bâti.Locking device for a drawing table mainly composed of a fixed work surface on a mobile column sliding vertically in a frame resting on the ground by a base, the weight of the mobile assembly being compensated by a balancing device disposed between the frame and the work surface, the movable column being cylindrical, a brake, integral with the frame, controlled by a pedal external to the frame, enclosing the cylindrical column in order to immobilize it in height and in rotation inside the built.

Les dispositifs de blocage connus sont, en général, composés par des systèmes auto-serreurs à came ou à bielles utilisés sur des colonnes mobiles rectangulaires.Known locking devices are, in general, composed by self-tightening systems with cam or rods used on rectangular mobile columns.

Le document DE-B-1 220 570 décrit un dispositif de blocage d'une table à dessiner comportant un frein solidaire du bâti et constitué d'une bande métallique 5 enserrant la colonne cylindrique 2 supportant le plan de travail. La bande 5 est fixée par l'une de ses extrémités sur un piton 6 d'une bague 4 reposant sur une nervure intérieure du bâti 1, l'autre extrémité de la bande 4 étant reliée au bras résistant d'un levier 7, au- dessus d'un point d'appui 8.Document DE-B-1 220 570 describes a device for blocking a drawing table comprising a brake secured to the frame and consisting of a metal strip 5 enclosing the cylindrical column 2 supporting the work surface. The strip 5 is fixed by one of its ends to a stud 6 of a ring 4 resting on an internal rib of the frame 1, the other end of the strip 4 being connected to the resistant arm of a lever 7, at - above a support point 8.

Le serrage de ce frein est obtenu en appliquant la force active du levier 7 au moyen d'une tige 9 de façon qu'il pivote autour du point d'appui 8.The application of this brake is obtained by applying the active force of the lever 7 by means of a rod 9 so that it pivots around the fulcrum 8.

Le problème que se propose de résondre l'invention est, dans un dispositif de blocage d'une table de dessin conforme au préambule de la revendication 1, celui posé par l'alignement et l'ajustement du serrage du frein sur la colonne mobile.The problem which the invention proposes to solve is, in a device for blocking a drawing table in accordance with the preamble of claim 1, that posed by the alignment and the adjustment of the brake application on the movable column.

Pour résandre ce problème conformément à la partie caractérisante de la revendication 1 le frein selon l'invention est constitué par deux mâchoires solidaires du bâti, une des mâchoires est reliée à un point fixe sur le bâti par un boulon, réglable en position dans un orifice oblong perpendiculaire à la direction de serrage des mâchoires, assurant l'alignement du frein sur la colonne, l'autre mâchoire est rendue solidaire de la première mâchoire par une chape, réglable parallèlement à la direction de serrage des mâchoires, ce qui permet de rapprocher ou d'éloigner les deux mâchoires, et d'ajuster ainsi le serrage du frein sur la colonne mobile, les deux dispositifs de réglage étant disposés du côté opposé à celui sur lequel agit le mécanisme de serrage.To solve this problem in accordance with the characterizing part of claim 1 the brake according to the invention consists of two jaws integral with the frame, one of the jaws is connected to a fixed point on the frame by a bolt, adjustable in position in an orifice oblong perpendicular to the clamping direction of the jaws, ensuring the alignment of the brake on the column, the other jaw is made integral with the first jaw by a yoke, adjustable parallel to the clamping direction of the jaws, which allows to bring closer or move the two jaws away, and thus adjust the brake application on the movable column, the two adjustment devices being arranged on the side opposite to that on which the clamping mechanism acts.

Des ressorts assurent en permanence le prin- cement des mâchoires sur la colonne mobile au moyen de deux bielles qui transmettent aux mâchoires la force des ressorts. Une extrémité de chacune des bielles est reliée à une plaque unique par un pivot, l'autre extrémité de chaque bielle étant reliée à l'extrémité d'une mâchoire de frein.Springs keep the jaws firmly on the movable column by means of two connecting rods which transmit the force of the springs to the jaws. One end of each of the connecting rods is connected to a single plate by a pivot, the other end of each connecting rod being connected to the end of a brake shoe.

Cette plasque unique est suspendue au bâti par les ressorts qui sont accrochés d'un côté sur des tourillons du bâti et de l'autre côté sur la plaque par des trous, des ressorts exerçant ainsi une force de traction sur ladite plaque de façon que soit assuré en permanence le serrage du frein sur la colonne mobile.This single plate is suspended from the frame by the springs which are hung on one side on the pins of the frame and on the other side on the plate by holes, springs thus exerting a traction force on said plate so that either permanently secured the brake on the mobile column.

La plaque mobile est reliée à la pédale extérieure au bâti par au moins une tringle, située à l'intérieur du bâti, qui commande les déplacements de ladite plaque permettant, par l'action des bielles sur les mâchoires de frein, le desserrage momentané de celles-ci et le changement de position du plan de travail.The movable plate is connected to the external pedal to the frame by at least one rod, located inside the frame, which controls the movements of said plate allowing, by the action of the connecting rods on the brake shoes, the momentary release of these and the change of position of the work plan.

Les principaux avantages apportés par ce dispositif résident dans la simplicité du mécanisme alliée au fait que la portance des mâchoires de frein sur une colonne cylindrique assure une sécurité sans défaut.The main advantages of this device lie in the simplicity of the mechanism combined with the fact that the bearing of the brake shoes on a cylindrical column ensures faultless safety.

D'autres avantages ressortiront de la description d'une forme de réalisation du dispositif donnée à titre d'exemple non limitatif et du dessin dans lequel:

  • - la figure 1 est une vue d'ensemble de la table à dessin,
  • - la figure 2 est une vue de côté de la colonne supportant le plan de travail,
  • - la figure 3 est une vue de dessus de la figure 2,
  • - la figure 4 est une vue en plan de la plaque mobile de commande des mâchoires de frein,
  • - la figure 5 est un schéma d'ensemble du dispositif.
Other advantages will emerge from the description of an embodiment of the device given by way of nonlimiting example and from the drawing in which:
  • - Figure 1 is an overview of the drawing table,
  • FIG. 2 is a side view of the column supporting the work surface,
  • FIG. 3 is a top view of FIG. 2,
  • FIG. 4 is a plan view of the movable plate for controlling the brake shoes,
  • - Figure 5 is an overall diagram of the device.

La figure 1 représente une vue d'ensemble d'une table à dessin composée principalement d'un bâti 1, muni d'une embase 2, dans lequel coulisse une colonne 3 supportant un plan de travail 4 par l'intermédiaire d'une ferrure d'orientation 5. Un dispositif d'équilibrage des poids est représenté en pointillé, pour mémoire.FIG. 1 represents an overall view of a drawing table mainly composed of a frame 1, provided with a base 2, in which slides a column 3 supporting a work surface 4 by means of a fitting Orientation 5. A weight balancing device is shown in dotted lines, for the record.

Les flèches a, b, c, indiquent les trois orientations qui peuvent être données au plan de travail 4.The arrows a, b, c indicate the three orientations that can be given to work plan 4.

Une pédale 6 située à l'extérieur du bâti, juste audessus de l'embase 2, permet de commander le dispositif de blocage selon l'invention.A pedal 6 located outside the frame, just above the base 2, allows the locking device according to the invention to be controlled.

Les figures 2 et 3 représentent le dispositif qui est constitué d'un frein 7 composé de deux mâchoires 70, 71 semi-circulaires, facultativement munies de garnitures, adaptées à la forme extérieure de la colonne 3.FIGS. 2 and 3 represent the device which consists of a brake 7 composed of two semi-circular jaws 70, 71, optionally provided with fittings, adapted to the external shape of the column 3.

Les mâchoires 70, 71 prennent appui sur le bâti 1, d'un côté par une articulation 701 sur un point fixe 100 dudit bâti disposé de façon qu'il autorise, tout en les épaulant, l'écartement des mâchoires du frein 7. La mâchoire 70 porte sur une de ses extrémités 700 l'articulation 701 constituée par un orifice oblong 702 au travers duquel passe un boulon 703 qui la maintient sur le point fixe 100. La mâchoire 71 porte à l'extrémité correspondante 710 une chape réglable 711 permettant de rapprocher ou d'éloigner les deux mâchoires et d'ajuster le serrage sur la colonne 3. L'alignement parfait du frein 7 sur la colonne 3 est assuré par le positionnement du boulon 703 dans l'orifice oblong 702 du point fixe 100. Les extrémités opposées 704 et 712 des mâchoires 70 et 71 reposent librement sur le redan 101 et glissent sur ce support lorsqu'elles sont écartées l'une de l'autre par une pression P exercée sur la pédale 6.The jaws 70, 71 bear on the frame 1, on one side by a hinge 701 on a fixed point 100 of said frame arranged so that it allows, while supporting them, the spacing of the brake shoes 7. The jaw 70 carries on one of its ends 700 the articulation 701 constituted by an oblong orifice 702 through which a bolt 703 passes which keeps it on the fixed point 100. The jaw 71 carries at the corresponding end 710 an adjustable yoke 711 allowing bring the two jaws closer together or farther apart and adjust the tightening on the column 3. Perfect alignment of the brake 7 on the column 3 is ensured by the positioning of the bolt 703 in the oblong opening 702 of the fixed point 100. The opposite ends 704 and 712 of the jaws 70 and 71 rest freely on the step 101 and slide on this support when they are spaced from each other by a pressure P exerted on the pedal 6.

La figure 4 représente les moyens de commande du frein 7 constitués par une plaque 8 suspendue par deux ressorts 9 accrochés d'un côté sur des tourillons 102 du bâti, de l'autre sur la plaque 8 par des trous 80 exerçant de ce fait une force de traction F sur ladite plaque.FIG. 4 shows the brake control means 7 constituted by a plate 8 suspended by two springs 9 hooked on one side to pins 102 of the frame, on the other on plate 8 by holes 80 thereby exerting a tensile force F on said plate.

Ladite plaque 8 ainsi suspendue, comporte des éléments de liaison avec les mâchoires 70, 71 constitués par deux bielles 81, 82 montées, chacune, sur deux pivots, les uns 83, 84 fichés perpendiculairement au plan de la plaque 8, les autres 705, 713 enchassés dans les extrémités 704,712 des mâchoires 70, 71.Said plate 8 thus suspended, comprises connecting elements with the jaws 70, 71 constituted by two connecting rods 81, 82 mounted, each on two pivots, some 83, 84 placed perpendicularly to the plane of the plate 8, the others 705, 713 embedded in the ends 704,712 of the jaws 70, 71.

A l'opposé des points d'attache 80 des ressorts 9, la plaque 8 est percée de deux trous 85, 86 par lesquels passent les extrémités recourbées 11 de deux tringles 10 reliées à la pédale 6 et maintenues en place par des rondelles et/ou goupilles.Opposite the attachment points 80 of the springs 9, the plate 8 is pierced with two holes 85, 86 through which pass the curved ends 11 of two rods 10 connected to the pedal 6 and held in place by washers and / or pins.

Lorsqu'une pression P, supérieure à la force F des ressorts 9, est exercée sur la pédale 6, la plaque 8 est tirée vers l'embase 2; les bielles 81, 82 tenues par leurs pivots 83, 84 écartent les mâchoires 70, 71 en tirant sur les pivots 705, 713. Dès que cesse la pression P, la force F resserre les mâchoires 70, 71 qu'elle maintient constamment rapprochées.When a pressure P, greater than the force F of the springs 9, is exerted on the pedal 6, the plate 8 is pulled towards the base 2; the connecting rods 81, 82 held by their pivots 83, 84 separate the jaws 70, 71 by pulling on the pivots 705, 713. As soon as the pressure P ceases, the force F tightens the jaws 70, 71 which it maintains constantly close together.

La figure 5 montre l'ensemble du dispositif de blocage, en place à l'intérieur du bâti, à l'exception des points fixes 100 et 101 du bâti 1 sur lesquels il s'appuie. La plaque 8 commande l'ouverture des mâchoires 70, 71 du frein 7 par l'intermédiaire des bielles 81, 82. Un dispositif d'équilibrage des poids du plan de travail et des appareils à dessiner tel que décrit dans le document FR-A-2 448317 empêche toute descente brutale de celui-ci lorsque la pression P est appliquée sur la pédale 6.FIG. 5 shows the whole of the locking device, in place inside the frame, with the exception of the fixed points 100 and 101 of the frame 1 on which it rests. The plate 8 controls the opening of the shoes 70, 71 of the brake 7 by means of the connecting rods 81, 82. A device for balancing the weights of the work surface and the drawing apparatuses as described in the document FR-A -2 448317 prevents any sudden descent of the latter when pressure P is applied to pedal 6.

Claims (3)

1. Device for locking a drawing table which consists essentially of a working board (4) secured to a movable cylindrical column (3) sliding vertically in a frame (1) provided with a base (2) bearing on the floor, the weight of the movable assembly (3, 4) being compensated by a balancing device disposed between the frame and the working board, a brake (7) secured to the frame and controlled by a pedal (6) disposed externally of the frame, is clamping the cylindrical column in order to hold it against vertical movement and against rotation within the frame, characterized by the fact that the brake (7) has two jaws (70, 71) fixed to the frame, that one of the jaws (70) is connected to a fixed point (100) of the frame through a pin (703) adjustable in position in an elongated orifice (702) perpendicular to the direction of the clamping of the jaws, for aligning the brake on the column (3), and that the other jaw (71) is connected to the first jaw (70) by a strap (711) adjustable in parallel with the direction of the clamping of the jaws, permitting of moving the two jaws towards or away from each other and of adjusting the application of the brake (7) on the movable column, the two adjustable devices being disposed on the side opposed to that on which the mecanism of clamping is acting.
2. Locking device according to claim 1, characterized by the fact that springs (9) constantly urge the jaws (70, 71) for clamping the movable column (3) by means of two arms (81, 82) transmitting the force of said springs to the jaws, and that one end of each arm is connected to a single plate (8) by means of a pivot (83, 84), the other end of each arm being connected to the end (704, 712) of a brake jaw.
3. Locking device according to claim 2, characterized by the fact that the plate (8) is suspended on the frame by means of the springs (9) attached on one side to trunnions (102) of the frame and on the other side to the plate (8) by means of holes (80), said springs exerting a tractive force (F) on said plate in such a manner that the brake (7) is constantly urged for clamping the movable column (3).
EP83201326A 1982-09-22 1983-09-15 Locking device for a drawing board Expired EP0106388B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8216328 1982-09-22
FR8216328A FR2533122B1 (en) 1982-09-22 1982-09-22 DEVICE FOR LOCKING A DRAWING TABLE

Publications (2)

Publication Number Publication Date
EP0106388A1 EP0106388A1 (en) 1984-04-25
EP0106388B1 true EP0106388B1 (en) 1985-12-04

Family

ID=9277818

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83201326A Expired EP0106388B1 (en) 1982-09-22 1983-09-15 Locking device for a drawing board

Country Status (6)

Country Link
US (1) US4557450A (en)
EP (1) EP0106388B1 (en)
JP (1) JPS5977808A (en)
AU (1) AU553554B2 (en)
DE (1) DE3361435D1 (en)
FR (1) FR2533122B1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2551332B1 (en) * 1983-09-07 1987-04-17 Alpia Sa SECURITY DEVICE FOR THE IMMOBILIZATION OF A DRAWING TABLE COLUMN
US5289782A (en) * 1991-12-03 1994-03-01 Westinghouse Electric Corp. Adjustable height table
CN112128585A (en) * 2020-09-17 2020-12-25 国网山东省电力公司烟台供电公司 An online monitoring device for distribution lines

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3096059A (en) * 1961-03-22 1963-07-02 F And F Koenigkramer Company Telescoping means having indexing, braking and interlocking means
DE1220570B (en) * 1962-02-19 1966-07-07 Pfaff Ag G M Drawing board stand
US3211250A (en) * 1962-12-21 1965-10-12 Garfield A Wood Seat-actuated brake and switch arrangement for motor vehicles
US3908944A (en) * 1972-12-04 1975-09-30 Domkraft Ab Nike Drawing table with drawing board relieved by gas spring
US4213244A (en) * 1978-05-08 1980-07-22 The Bendix Corporation Coordinate measuring machine having a failsafe protection system
DE3003119C2 (en) * 1979-02-12 1986-11-27 Société Jeandal, Besancon Device for blocking the working surface of a drawing table

Also Published As

Publication number Publication date
JPH0258922B2 (en) 1990-12-11
EP0106388A1 (en) 1984-04-25
AU1879583A (en) 1984-03-29
FR2533122B1 (en) 1986-08-29
JPS5977808A (en) 1984-05-04
AU553554B2 (en) 1986-07-17
US4557450A (en) 1985-12-10
DE3361435D1 (en) 1986-01-16
FR2533122A1 (en) 1984-03-23

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