EP0624329A1 - Guide tube for length adjustable column of height adjustable furniture - Google Patents

Guide tube for length adjustable column of height adjustable furniture Download PDF

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Publication number
EP0624329A1
EP0624329A1 EP94400985A EP94400985A EP0624329A1 EP 0624329 A1 EP0624329 A1 EP 0624329A1 EP 94400985 A EP94400985 A EP 94400985A EP 94400985 A EP94400985 A EP 94400985A EP 0624329 A1 EP0624329 A1 EP 0624329A1
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EP
European Patent Office
Prior art keywords
tubular body
tube according
tube
guide tube
folded
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.)
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Application number
EP94400985A
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German (de)
French (fr)
Inventor
Dominique Dony
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Airax SA
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Airax SA
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Publication date
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Publication of EP0624329A1 publication Critical patent/EP0624329A1/en
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    • 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
    • A47C3/30—Chairs or stools with vertically-adjustable seats with vertically-acting fluid cylinder

Definitions

  • the present invention relates to a guide tube intended to form part of a telescopic column interposed between the base of a piece of furniture and an upper part, situated at an adjustable height, of the same piece of furniture.
  • Furniture has been known for a long time, and in particular office chairs, which consist of a base, intended to rest on the ground, of a vertical telescopic column, fixed to this base, and of an upper part, such as 'a seat, possibly provided with a backrest and armrests, which is fixed on the upper part of this telescopic column.
  • the telescopic column is, according to a technique well known now, composed of two tubes which slide one inside the other, with the interposition of a sleeve of material with low coefficient of friction, and a lockable gas spring is inserted at the inside these tubes, its body being immobilized in the upper part, and its piston rod being fixed in the lower part of the column.
  • the telescopic column comprises a lower tube, or guide tube, fixed to the base, and provided, at its base, with a bottom having the general shape of a disc pierced with a central hole which is crossed by the end of the gas spring piston rod.
  • a stop means located below the bottom, retains the piston rod, which, moreover, is supported on a ball or roller bearing, which rests on the upper face of the bottom.
  • the base was fixed to the guide tube by welding or clamping using collar means.
  • the trend now is to fix the guide tube on the base by force fitting, after giving the lower end of this tube a converging conical shape of the "Morse cone" type, that is to say with a half - angle at the top of 1 ° 26 min 16 s, normalized value, the base has, of course, a recess of corresponding shape.
  • the underside of the bottom which retains this rod, should not be flush with the end of the guide tube, but should be slightly recessed at the inside of it.
  • a known technique consists in providing a folding inward of the end edges of the guide tube, so as to constitute a support for the bottom, and to immobilize the latter using bosses directed towards the inside of the tube, and obtained by stamping.
  • the object of the present invention is to respond to this problem, and to provide a guide tube provided with a bottom which is automatically well centered and well placed, without it being necessary to provide, for manufacturing, a stock of parts. having several different diameters.
  • the invention provides a tube guide intended to be part of a telescopic column interposed between the base of a piece of furniture and an upper part, situated at an adjustable height, of the same piece of furniture, this guide tube comprising a tubular body designed to be fixed to the base by its outer surface, and a bottom, which is immobilized between one end of the tubular body which is folded inwards, and at least one boss constituted by a part of the tubular body which is pushed back inwards, the bottom moreover having a central hole intended to receive the end of the piston rod of a gas spring which forms part of said column, this guide tube having the particularity that the bottom has a periphery which, as a whole, has the form of a circle of radius smaller than the minimum radius provided for the tubular bodies in which it must be mounted, this periphery further comprising foldable legs, projecting outwardly r beyond said circle, the distance from the end of the legs to the center of said circle being, before mounting, greater than the maximum radius provided for
  • the foldable legs according to the invention play the role of centering, that is to say that they allow perfect centering of the bottom, before it is immobilized, within the limits of the diameter of the end of the frustoconical part which does not are limited only by the importance of said legs, provided of course that the elasticity of the material of which said legs are sufficient.
  • the bottom is made of steel, a metal with sufficient elasticity to obtain the above result.
  • the legs before mounting, are oblique with respect to the overall plane of the bottom, which facilitates their bending. After installation in the tubular body, the legs will be more or less close to an axial direction depending on the diameter of the tubular body.
  • the bottom comprises a substantially cylindrical peripheral part, surrounding a flat central part or with an overall curvature relatively weak, and the legs are cut in the cylindrical peripheral part, connected to the central part and deviating from it towards the outside.
  • the edge of the cylindrical peripheral part of the bottom bears against the folded end of the tubular body, and the central part of the bottom is held by the bosses located at a distance from the end of the tubular body.
  • the edge of the cylindrical peripheral part of the bottom is held by the bosses located at a distance from the end of the tubular body, and the central part of the bottom comes to bear against the folded end of the tubular body .
  • the bottom face of the bottom is at a distance from the plane of the folded-down part of the tubular body at least equal to the length of the part of the piston rod which projects downwards beyond the bottom.
  • the central part of the bottom has at least one circular step, concentric with the central hole.
  • Figure 1 shows a seat, described by way of example, and comprising a base 1, a seat 2, provided with a backrest and armrests and a telescopic column comprising a guide tube 3 fixed by its lower part to the base , and an upper tube 4 fixed to the seat cushion and sliding in the lower tube 3 with the interposition of a sliding sleeve 5.
  • FIG. 2 shows the lower end of the tube 3, which is assumed not to be mounted in the base 1.
  • the guide tube 3 comprises a cylindrical part 6 and a frustoconical part 7, which extends it downwards.
  • a gas spring 8 Inside the telescopic column is a gas spring 8, the piston rod 9 of which is fixed to a bottom 10 by means of a stop ring 11, bearing on the underside of the bottom 10.
  • the lower end of the tube 3 has a part 13 folded inwards, and on which the base 10 rests. It also has bosses 14, constituting indentations directed inwards, obtained by the press.
  • the bottom 10 has a central portion 20, traversed by a central hole 21, which is connected to a cylindrical peripheral portion 22 directed downwards.
  • the peripheral part 22 have been cut four tabs 23, which constitute an essential element of the present invention.
  • the tabs 23 are integral with the central part, and their opposite end deviates from the axis, so that this tab is oblique, at least before mounting.
  • the diameter of the cylindrical part 22 is slightly less than the diameter of the frustoconical part 7, in the vicinity of its end.
  • the height of the cylindrical part 22 is substantially equal to the distance between the folded part 13 and the boss 14. This is not surprising, because either the boss 14 or the folded part 13 were closed after the introduction of the bottom 10.
  • the central part 20 has two circular steps 24.25 concentric with the central hole, which improves the axial rigidity of the bottom.
  • the steps are arranged in such a way that the periphery of the central part is situated higher than its middle, which has made it possible to increase the length of the legs 23.
  • FIG 6 there is shown a variant of the shape of the bottom.
  • the cylindrical part 30 is held, at its end, by the bosses 14, and comes to bear on the folded part 13 in the zone where it is connected to the central part 31.
  • the utility of this groove is to keep the lower surface of the central part 31 away from the plane of the folded part 13, so as to prevent the end of the piston rod 9 does not project beyond the tube 3.
  • this variant is not the preferred one, as it results in a slightly more complicated bottom shape. However, in certain specific cases, it can facilitate the positioning of the bottom 10 in the tube 3.

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  • Chairs Characterized By Structure (AREA)
  • Tables And Desks Characterized By Structural Shape (AREA)

Abstract

Guide tube designed as part of a length adjustable column fitted between the underframe and the top part of an item of height adjustable furniture, this tube comprising a tubular body (3) and an end piece (10) which supports the end of the piston rod (9) of a gas spring (8) placed inside the column. Around the perimeter of this end piece are springy tongues (23) that are supported on the inside surface of the tubular body (3) and ensure that the end piece is centred until fixed in place by swaging. <IMAGE>

Description

La présente invention est relative à un tube de guidage destiné à faire partie d'une colonne télescopique intercalée entre le piétement d'un meuble et une partie supérieure, située à une hauteur réglable, du même meuble.The present invention relates to a guide tube intended to form part of a telescopic column interposed between the base of a piece of furniture and an upper part, situated at an adjustable height, of the same piece of furniture.

On connaît depuis longtemps des meubles, et notamment des sièges de bureau, qui sont constitués d'un piétement, destiné à reposer sur le sol, d'une colonne télescopique verticale, fixée à ce piétement, et d'une partie supérieure, telle qu'une assise, pourvue éventuellement d'un dossier et d'accoudoirs, qui est fixée sur la partie supérieure de cette colonne télescopique.Furniture has been known for a long time, and in particular office chairs, which consist of a base, intended to rest on the ground, of a vertical telescopic column, fixed to this base, and of an upper part, such as 'a seat, possibly provided with a backrest and armrests, which is fixed on the upper part of this telescopic column.

La colonne télescopique est, suivant une technique bien connue maintenant, composée de deux tubes qui coulissent l'un dans l'autre, avec interposition d'une douille de matière à faible coefficient de frottement, et un ressort à gaz blocable est inséré à l'intérieur de ces tubes, son corps étant immobilisé en partie supérieure, et sa tige de piston étant fixée en partie inférieure de la colonne.The telescopic column is, according to a technique well known now, composed of two tubes which slide one inside the other, with the interposition of a sleeve of material with low coefficient of friction, and a lockable gas spring is inserted at the inside these tubes, its body being immobilized in the upper part, and its piston rod being fixed in the lower part of the column.

Plus précisément, la colonne télescopique comprend un tube inférieur, ou tube de guidage, fixé au piétement, et pourvu, à sa base, d'un fond ayant la forme générale d'un disque percé d'un trou central qui est traversé par l'extrémité de la tige de piston du ressort à gaz. Un moyen d'arrêt, situé en dessous du fond, retient la tige de piston, qui, par ailleurs, est en appui sur un roulement à billes ou à rouleaux, lequel repose sur la face supérieure du fond.More specifically, the telescopic column comprises a lower tube, or guide tube, fixed to the base, and provided, at its base, with a bottom having the general shape of a disc pierced with a central hole which is crossed by the end of the gas spring piston rod. A stop means, located below the bottom, retains the piston rod, which, moreover, is supported on a ball or roller bearing, which rests on the upper face of the bottom.

Initialement, le piétement était fixé sur le tube de guidage par soudage ou serrage à l'aide de moyens formant collier. La tendance maintenant est de fixer le tube de guidage sur le piétement par emmanchement à force, après avoir donné à l'extrémité inférieure de ce tube une forme conique convergente du type "cône Morse", c'est-à-dire avec un demi-angle au sommet de 1° 26 mn 16 s, valeur normalisée, le piétement présente, bien entendu, un évidement de forme correspondante.Initially, the base was fixed to the guide tube by welding or clamping using collar means. The trend now is to fix the guide tube on the base by force fitting, after giving the lower end of this tube a converging conical shape of the "Morse cone" type, that is to say with a half - angle at the top of 1 ° 26 min 16 s, normalized value, the base has, of course, a recess of corresponding shape.

Pour limiter les risques de détérioration, ou de déblocage accidentel, de la tige de piston du ressort à gaz, il convient que la face inférieure du fond, qui retient cette tige, ne soit pas en affleurement avec l'extrémité du tube de guidage, mais soit un peu en retrait à l'intérieur de celui-ci.To limit the risk of deterioration, or accidental release of the piston rod of the gas spring, the underside of the bottom, which retains this rod, should not be flush with the end of the guide tube, but should be slightly recessed at the inside of it.

Une technique connue consiste à prévoir un rabattement vers l'intérieur des bords d'extrémité du tube de guidage, de façon à constituer un appui pour le fond, et à immobiliser celui-ci à l'aide de bossages dirigés vers l'intérieur du tube, et obtenu par emboutissage.A known technique consists in providing a folding inward of the end edges of the guide tube, so as to constitute a support for the bottom, and to immobilize the latter using bosses directed towards the inside of the tube, and obtained by stamping.

Cette solution présente cependant l'inconvénient suivant : si la conicité du tube obéit à des normes très précises, il n'en est pas de même de la longueur de la partie conique, et de son diamètre à l'extrémité. Les tolérances acceptées, qui s'ajoutent, éventuellement aux différences entre les exigences des divers utilisateurs, font que ce diamètre n'est pas constant d'un tube à un autre. Lors de la pose de la pièce formant le fond, celle-ci ne se trouve centrée que si son diamètre correspond très exactement au diamètre intérieur du tube juste au-dessus de la partie d'extrémité rabattue. Il faut éviter que la partie formant le fond soit d'un diamètre plus élevé que celui du tube à cet endroit, afin d'empêcher que le fond se dispose obliquement, ce qui entraînerait un mauvais fonctionnement du roulement et/ou des contraintes inadmissibles sur le ressort à gaz. Si, au contraire, le diamètre de la pièce formant le fond est trop petit, il devient très difficile d'obtenir un centrage correct. On est donc dans l'obligation de prévoir un certain nombre de pièces destinées à former les fonds, et de choisir chaque fois le diamètre convenable, ce qui complique la gestion et alourdit les stocks.However, this solution has the following drawback: if the conicity of the tube obeys very precise standards, the same cannot be said of the length of the conical part, and of its diameter at the end. The accepted tolerances, which are added, possibly to the differences between the requirements of the various users, mean that this diameter is not constant from one tube to another. When installing the part forming the bottom, it is only centered if its diameter corresponds exactly to the inside diameter of the tube just above the folded end part. It is necessary to avoid that the part forming the bottom is of a larger diameter than that of the tube at this place, in order to prevent that the bottom is disposed obliquely, which would cause a malfunction of the bearing and / or unacceptable stresses on the gas spring. If, on the contrary, the diameter of the part forming the bottom is too small, it becomes very difficult to obtain correct centering. We are therefore obliged to provide a certain number of parts intended to form the bottoms, and to choose the appropriate diameter each time, which complicates management and increases stocks.

La présente invention a pour but de répondre à ce problème, et de fournir un tube de guidage pourvu d'un fond qui soit automatiquement bien centré et bien placé, sans qu'il soit nécessaire de prévoir, pour la fabrication, un stock de pièces ayant plusieurs diamètres différents.The object of the present invention is to respond to this problem, and to provide a guide tube provided with a bottom which is automatically well centered and well placed, without it being necessary to provide, for manufacturing, a stock of parts. having several different diameters.

Pour obtenir ce résultat, l'invention fournit un tube de guidage destiné à faire partie d'une colonne télescopique intercalée entre le piétement d'un meuble et une partie supérieure, située à une hauteur réglable, du même meuble, ce tube de guidage comprenant un corps tubulaire conçu pour être fixé au piétement par sa surface extérieure, et un fond, qui est immobilisé entre une extrémité du corps tubulaire qui est rabattu vers l'intérieur, et au moins un bossage constitué par une partie du corps tubulaire qui est repoussée vers l'intérieur, le fond présentant par ailleurs un trou central destiné à recevoir l'extrémité de la tige de piston d'un ressort à gaz qui fait partie de ladite colonne, ce tube de guidage ayant pour particularité que le fond présente une périphérie qui, dans son ensemble, à la forme d'un cercle de rayon inférieur au rayon minimal prévu pour les corps tubulaires dans lesquels il doit être monté, cette périphérie comportant en outre des pattes pliables, en saillie vers l'extérieur au-delà dudit cercle, la distance de l'extrémité des pattes au centre dudit cercle étant, avant montage, supérieure au rayon maximal prévu pour lesdits corps tubulaires.To obtain this result, the invention provides a tube guide intended to be part of a telescopic column interposed between the base of a piece of furniture and an upper part, situated at an adjustable height, of the same piece of furniture, this guide tube comprising a tubular body designed to be fixed to the base by its outer surface, and a bottom, which is immobilized between one end of the tubular body which is folded inwards, and at least one boss constituted by a part of the tubular body which is pushed back inwards, the bottom moreover having a central hole intended to receive the end of the piston rod of a gas spring which forms part of said column, this guide tube having the particularity that the bottom has a periphery which, as a whole, has the form of a circle of radius smaller than the minimum radius provided for the tubular bodies in which it must be mounted, this periphery further comprising foldable legs, projecting outwardly r beyond said circle, the distance from the end of the legs to the center of said circle being, before mounting, greater than the maximum radius provided for said tubular bodies.

Les pattes pliables conformes à l'invention jouent le rôle de centreur, c'est-à-dire qu'elles permettent un centrage parfait du fond, avant son immobilisation, dans des limites du diamètre de l'extrémité de la partie tronconique qui ne sont limitées que par l'importance desdites pattes, à condition bien entendu que l'élasticité de la matière dont sont faites lesdites pattes soit suffisante. Habituellement, le fond est en acier, métal dont l'élasticité est bien suffisante pour obtenir le résultat ci-dessus.The foldable legs according to the invention play the role of centering, that is to say that they allow perfect centering of the bottom, before it is immobilized, within the limits of the diameter of the end of the frustoconical part which does not are limited only by the importance of said legs, provided of course that the elasticity of the material of which said legs are sufficient. Usually, the bottom is made of steel, a metal with sufficient elasticity to obtain the above result.

Avantageusement, avant montage, les pattes sont obliques par rapport au plan d'ensemble du fond, ce qui facilite leur flexion. Après la mise en place dans le corps tubulaire, les pattes seront plus ou moins proches d'une direction axiale selon le diamètre du corps tubulaire.Advantageously, before mounting, the legs are oblique with respect to the overall plane of the bottom, which facilitates their bending. After installation in the tubular body, the legs will be more or less close to an axial direction depending on the diameter of the tubular body.

Suivant une réalisation avantageuse, le fond comprend une partie périphérique sensiblement cylindrique, entourant une partie centrale plane ou à courbure d'ensemble relativement faible, et les pattes sont découpées dans la partie périphérique cylindrique, raccordées à la partie centrale et s'en s'écartant vers l'extérieur. On obtient ainsi un mode d'obtention particulièrement simple.According to an advantageous embodiment, the bottom comprises a substantially cylindrical peripheral part, surrounding a flat central part or with an overall curvature relatively weak, and the legs are cut in the cylindrical peripheral part, connected to the central part and deviating from it towards the outside. This gives a particularly simple method of production.

Selon un mode d'obtention préféré, le bord de la partie périphérique cylindrique du fond vient en appui contre l'extrémité rabattue du corps tubulaire, et la partie centrale du fond est maintenue par les bossages situés à distance de l'extrémité du corps tubulaire.According to a preferred method of obtaining, the edge of the cylindrical peripheral part of the bottom bears against the folded end of the tubular body, and the central part of the bottom is held by the bosses located at a distance from the end of the tubular body. .

Selon un autre mode d'exécution, le bord de la partie périphérique cylindrique du fond est maintenu par les bossages situés à distance de l'extrémité du corps tubulaire, et la partie centrale du fond vient en appui contre l'extrémité rabattue du corps tubulaire. Ces deux réalisations ne sont pas tout à fait équivalentes. La première permet, avec des formes plus simples du fond, d'obtenir cependant que l'extrémité de la tige de piston ne fasse pas saillie au-delà du corps tubulaire. En revanche, dans certains cas, le mode d'exécution décrit en second peut faciliter la mise en place du fond.According to another embodiment, the edge of the cylindrical peripheral part of the bottom is held by the bosses located at a distance from the end of the tubular body, and the central part of the bottom comes to bear against the folded end of the tubular body . These two achievements are not entirely equivalent. The first allows, with simpler forms of the bottom, to obtain however that the end of the piston rod does not protrude beyond the tubular body. On the other hand, in certain cases, the mode of execution described in second can facilitate the installation of the bottom.

Avantageusement, la face inférieure du fond est à une distance du plan de la partie rabattue du corps tubulaire au moins égale à la longueur de la partie de la tige de piston qui dépasse vers le bas au-delà du fond.Advantageously, the bottom face of the bottom is at a distance from the plane of the folded-down part of the tubular body at least equal to the length of the part of the piston rod which projects downwards beyond the bottom.

Pour une plus grande rigidité axiale, la partie centrale du fond présente au moins un gradin circulaire, concentrique au trou central.For greater axial rigidity, the central part of the bottom has at least one circular step, concentric with the central hole.

L'invention va maintenant être décrite de façon plus détaillée à l'aide d'un exemple pratique, illustré avec les dessins parmi lesquels :

  • figure 1 est une vue perspective d'un meuble comportant un tube conforme à l'invention,
  • figure 2 est une coupe axiale partielle de la partie inférieure du tube de guidage,
  • figure 3 est une vue en plan du fond avant montage,
  • figures 4 et 5 sont des coupes transversales selon les lignes IV-IV et V-V de la figure 3,
  • figure 6 est une vue en coupe partielle, analogue à la figure 2, et montrant une variante de l'invention.
The invention will now be described in more detail with the aid of a practical example, illustrated with the drawings among which:
  • FIG. 1 is a perspective view of a piece of furniture comprising a tube according to the invention,
  • FIG. 2 is a partial axial section of the lower part of the guide tube,
  • FIG. 3 is a plan view of the bottom before mounting,
  • FIGS. 4 and 5 are cross sections along lines IV-IV and VV of FIG. 3,
  • Figure 6 is a partial sectional view, similar to Figure 2, and showing a variant of the invention.

La figure 1 montre un siège, décrit à titre d'exemple, et comportant un piétement 1, une assise 2, pourvue d'un dossier et d'accoudoirs et une colonne télescopique comprenant un tube de guidage 3 fixé par sa partie inférieure au piétement, et un tube supérieur 4 fixé à l'assise du siège et coulissant dans le tube inférieur 3 avec interposition d'une douille de glissement 5.Figure 1 shows a seat, described by way of example, and comprising a base 1, a seat 2, provided with a backrest and armrests and a telescopic column comprising a guide tube 3 fixed by its lower part to the base , and an upper tube 4 fixed to the seat cushion and sliding in the lower tube 3 with the interposition of a sliding sleeve 5.

La figure 2 montre l'extrémité inférieure du tube 3, supposée non montée dans le piétement 1. Le tube de guidage 3 comprend une partie cylindrique 6 et une partie tronconique 7, qui la prolonge vers le bas. A l'intérieur de la colonne télescopique se trouve un ressort à gaz 8, dont la tige de piston 9 est fixée sur un fond 10 grâce à une bague d'arrêt 11, en appui sur la face inférieure du fond 10. Un roulement à billes 12, représenté schématiquement, repose sur la face supérieure du fond 10 et supporte un épaulement de la tige de piston. L'extrémité inférieure du tube 3 présente une partie 13 rabattue vers l'intérieur, et sur laquelle repose le fond 10. Elle présente aussi des bossages 14, constituant des renfoncements dirigés vers l'intérieur, obtenus à la presse.FIG. 2 shows the lower end of the tube 3, which is assumed not to be mounted in the base 1. The guide tube 3 comprises a cylindrical part 6 and a frustoconical part 7, which extends it downwards. Inside the telescopic column is a gas spring 8, the piston rod 9 of which is fixed to a bottom 10 by means of a stop ring 11, bearing on the underside of the bottom 10. A bearing with balls 12, shown schematically, rests on the upper face of the bottom 10 and supports a shoulder of the piston rod. The lower end of the tube 3 has a part 13 folded inwards, and on which the base 10 rests. It also has bosses 14, constituting indentations directed inwards, obtained by the press.

Si on se reporte aux figures 3 à 5, on constate que le fond 10 comporte une partie centrale 20, traversée par un trou central 21, qui se raccorde à une partie périphérique cylindrique 22 dirigée vers le bas. Dans la partie périphérique 22 ont été découpées quatre pattes 23, qui constituent un élément essentiel de la présente invention. Comme on le voit mieux sur la figure 4, les pattes 23 sont solidaires de la partie centrale, et leur extrémité opposée s'écarte de l'axe, si bien que cette patte se trouve oblique, au moins avant montage.If we refer to Figures 3 to 5, we see that the bottom 10 has a central portion 20, traversed by a central hole 21, which is connected to a cylindrical peripheral portion 22 directed downwards. In the peripheral part 22 have been cut four tabs 23, which constitute an essential element of the present invention. As best seen in Figure 4, the tabs 23 are integral with the central part, and their opposite end deviates from the axis, so that this tab is oblique, at least before mounting.

Le diamètre de la partie cylindrique 22 est légèrement inférieur au diamètre de la partie tronconique 7, au voisinage de son extrémité. Cependant, à la figure 2, où l'on voit le fond 10 monté dans le tube de guidage 3, on n'a pas figuré le jeu entre ces deux pièces, pour simplifier le dessin. La hauteur de la partie cylindrique 22 est sensiblement égale à la distance entre la partie rabattue 13 et le bossage 14. Cela ne peut pas surprendre, car, soit le bossage 14, soit la partie rabattue 13 ont été fermés après l'introduction du fond 10.The diameter of the cylindrical part 22 is slightly less than the diameter of the frustoconical part 7, in the vicinity of its end. However, in Figure 2, where we see the bottom 10 mounted in the guide tube 3, we have not figured the game between these two pieces, to simplify the drawing. The height of the cylindrical part 22 is substantially equal to the distance between the folded part 13 and the boss 14. This is not surprising, because either the boss 14 or the folded part 13 were closed after the introduction of the bottom 10.

La partie centrale 20 présente deux gradins 24,25 circulaires et concentriques au trou central, ce qui améliore la rigidité axiale du fond. Les gradins sont disposés de telle façon que la périphérie de la partie centrale est située plus haut que son milieu, ce qui a permis d'augmenter la longueur des pattes 23.The central part 20 has two circular steps 24.25 concentric with the central hole, which improves the axial rigidity of the bottom. The steps are arranged in such a way that the periphery of the central part is situated higher than its middle, which has made it possible to increase the length of the legs 23.

A la figure 6, on a représenté une variante de la forme du fond. La partie cylindrique 30 est maintenue, à son extrémité, par les bossages 14, et vient en appui sur la partie rabattue 13 dans la zone où elle se raccorde à la partie centrale 31. Celle-ci présente, à sa jonction avec le bord périphérique cylindrique 30 une rainure annulaire profonde, ouverte vers le haut 32. L'utilité de cette rainure est de maintenir la surface inférieure de la partie centrale 31 à distance du plan de la partie rabattue 13, de façon à éviter que l'extrémité de la tige de piston 9 ne face saillie au-delà du tube 3.In Figure 6, there is shown a variant of the shape of the bottom. The cylindrical part 30 is held, at its end, by the bosses 14, and comes to bear on the folded part 13 in the zone where it is connected to the central part 31. This presents, at its junction with the peripheral edge cylindrical 30 a deep annular groove, open upwards 32. The utility of this groove is to keep the lower surface of the central part 31 away from the plane of the folded part 13, so as to prevent the end of the piston rod 9 does not project beyond the tube 3.

Comme on l'a dit plus haut, cette variante n'est pas la préférée, car elle aboutit à une forme du fond un peu plus compliquée. Cependant, dans certains cas précis, elle peut faciliter la mise en place du fond 10 dans le tube 3.As mentioned above, this variant is not the preferred one, as it results in a slightly more complicated bottom shape. However, in certain specific cases, it can facilitate the positioning of the bottom 10 in the tube 3.

Claims (7)

Tube de guidage destiné à faire partie d'une colonne télescopique intercalée entre le piétement d'un meuble et une partie supérieure, située à une hauteur réglable, du même meuble, ce tube de guidage comprenant un corps tubulaire (3) conçu pour être fixé au piétement par sa surface extérieure, et un fond (10) qui est immobilisé entre une extrémité (13) du corps tubulaire qui est rabattue vers l'intérieur, et au moins un bossage (14) constitué par une partie du corps tubulaire qui est repoussée vers l'intérieur, le fond présentant par ailleurs un trou central destiné à recevoir l'extrémité de la tige de piston d'un ressort à gaz qui fait partie de ladite colonne,
   caractérisé en ce que le fond (10) présente une périphérie qui, dans son ensemble, à la forme d'un cercle de rayon inférieur au rayon minimal prévu pour les corps tubulaires dans lesquels il doit être monté, cette périphérie comportant en outre des pattes pliables (23), en saillie vers l'extérieur au-delà dudit cercle, la distance de l'extrémité des pattes au centre dudit cercle étant, avant montage, supérieure au rayon maximal prévu pour lesdits corps tubulaires.Guide tube intended to be part of a telescopic column interposed between the base of a piece of furniture and an upper part, situated at an adjustable height, of the same piece of furniture, this guide tube comprising a tubular body (3) designed to be fixed to the base by its outer surface, and a bottom (10) which is immobilized between one end (13) of the tubular body which is folded inwards, and at least one boss (14) constituted by a part of the tubular body which is pushed inwards, the bottom also having a central hole intended to receive the end of the piston rod of a gas spring which is part of said column,
characterized in that the bottom (10) has a periphery which, as a whole, has the shape of a circle of radius smaller than the minimum radius provided for the tubular bodies in which it must be mounted, this periphery further comprising tabs foldable (23), projecting outwards beyond said circle, the distance from the end of the legs to the center of said circle being, before mounting, greater than the maximum radius provided for said tubular bodies. Tube selon la revendication 1, caractérisé en ce que les pattes (23) sont, avant montage, obliques par rapport au plan d'ensemble du fond.Tube according to claim 1, characterized in that the tabs (23) are, before assembly, oblique with respect to the overall plane of the bottom. Tube selon la revendication 1 ou 2, caractérisé en ce que le fond comprend une partie périphérique sensiblement cylindrique (22), entourant une partie centrale (20) plane ou à courbure d'ensemble relativement faible, et les pattes sont découpées dans la partie périphérique cylindrique, raccordées à la partie centrale et s'en s'écartant vers l'extérieur.Tube according to claim 1 or 2, characterized in that the bottom comprises a substantially cylindrical peripheral part (22), surrounding a central part (20) planar or with relatively small overall curvature, and the legs are cut in the peripheral part cylindrical, connected to the central part and moving away from it. Tube selon la revendication 3, caractérisé en ce que le bord de la partie périphérique cylindrique du fond (22) vient en appui contre l'extrémité rabattue du corps tubulaire, et la partie centrale du fond est maintenue par les bossages situés à distance de l'extrémité du corps tubulaire.Tube according to claim 3, characterized in that the edge of the cylindrical peripheral part of the bottom (22) bears against the folded end of the tubular body, and the central part of the bottom is held by the bosses located at a distance from the end of the body tubular. Tube selon la revendication 3, caractérisé en ce que le bord de la partie périphérique cylindrique (22) du fond est maintenu par les bossages situés à distance de l'extrémité du corps tubulaire, et la partie centrale du fond vient en appui contre l'extrémité rabattue du corps tubulaire.Tube according to claim 3, characterized in that the edge of the cylindrical peripheral part (22) of the bottom is held by the bosses located at a distance from the end of the tubular body, and the central part of the bottom bears against the folded end of the tubular body. Tube selon l'une des revendications 1 à 5, caractérisé en ce que la face inférieure du fond (10) est à une distance du plan de la partie rabattue du corps tubulaire au moins égale à la longueur de la partie de la tige de piston (9) qui dépasse vers le bas au-delà du fond.Tube according to one of claims 1 to 5, characterized in that the underside of the bottom (10) is at a distance from the plane of the folded part of the tubular body at least equal to the length of the part of the piston rod (9) protruding down beyond the bottom. Tube selon l'une des revendications 1 à 6, caractérisé en ce que la partie centrale du fond présente au moins un gradin (24,25) circulaire, concentrique au trou central.Tube according to one of Claims 1 to 6, characterized in that the central part of the bottom has at least one circular step (24,25) concentric with the central hole.
EP94400985A 1993-05-12 1994-05-05 Guide tube for length adjustable column of height adjustable furniture Withdrawn EP0624329A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9305712A FR2705020B1 (en) 1993-05-12 1993-05-12 GUIDE TUBE FOR TELESCOPIC COLUMN OF FURNITURE ADJUSTABLE IN HEIGHT.
FR9305712 1993-05-12

Publications (1)

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EP0624329A1 true EP0624329A1 (en) 1994-11-17

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ID=9447049

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EP94400985A Withdrawn EP0624329A1 (en) 1993-05-12 1994-05-05 Guide tube for length adjustable column of height adjustable furniture

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EP (1) EP0624329A1 (en)
FR (1) FR2705020B1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0802346A2 (en) * 1996-04-11 1997-10-22 Gain Gas Technique, S.L. Gas cylinder
ES2147496A1 (en) * 1996-10-02 2000-09-01 Stabilus Gmbh Adjustable column
CN1106512C (en) * 1997-06-04 2003-04-23 燃气技术开发公司 Gas cylinder

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274661A1 (en) * 1986-12-13 1988-07-20 Stabilus GmbH A construction assembly
EP0366889A1 (en) * 1988-10-06 1990-05-09 SUSPA COMPART Aktiengesellschaft Adjustable column for chairs, tables or the like
EP0511500A1 (en) * 1991-05-01 1992-11-04 SUSPA COMPART Aktiengesellschaft Blockable lifting device for continuously adjusting a seat

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0274661A1 (en) * 1986-12-13 1988-07-20 Stabilus GmbH A construction assembly
EP0366889A1 (en) * 1988-10-06 1990-05-09 SUSPA COMPART Aktiengesellschaft Adjustable column for chairs, tables or the like
EP0511500A1 (en) * 1991-05-01 1992-11-04 SUSPA COMPART Aktiengesellschaft Blockable lifting device for continuously adjusting a seat

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0802346A2 (en) * 1996-04-11 1997-10-22 Gain Gas Technique, S.L. Gas cylinder
US5833322A (en) * 1996-04-11 1998-11-10 Gain Gas Technique, S.L. Gas cylinder
EP0802346A3 (en) * 1996-04-11 1998-12-23 Gain Gas Technique, S.L. Gas cylinder
ES2143338A1 (en) * 1996-04-11 2000-05-01 Gain Gas Technique Sl Gas cylinder
ES2147496A1 (en) * 1996-10-02 2000-09-01 Stabilus Gmbh Adjustable column
CN1106512C (en) * 1997-06-04 2003-04-23 燃气技术开发公司 Gas cylinder

Also Published As

Publication number Publication date
FR2705020B1 (en) 1995-07-13
FR2705020A1 (en) 1994-11-18

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