FR2668213A1 - Device for assembling two tubes for the purpose of adjusting their length - Google Patents

Device for assembling two tubes for the purpose of adjusting their length Download PDF

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Publication number
FR2668213A1
FR2668213A1 FR9013152A FR9013152A FR2668213A1 FR 2668213 A1 FR2668213 A1 FR 2668213A1 FR 9013152 A FR9013152 A FR 9013152A FR 9013152 A FR9013152 A FR 9013152A FR 2668213 A1 FR2668213 A1 FR 2668213A1
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FR
France
Prior art keywords
tube
elastic block
diameter
assembling
length
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.)
Pending
Application number
FR9013152A
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French (fr)
Inventor
Denjean Francois
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to FR9013152A priority Critical patent/FR2668213A1/en
Publication of FR2668213A1 publication Critical patent/FR2668213A1/en
Pending legal-status Critical Current

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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16BDEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/10Telescoping systems
    • F16B7/14Telescoping systems locking in intermediate non-discrete positions
    • F16B7/1445Telescoping systems locking in intermediate non-discrete positions with a rubber bushing gripping inside the outer telescoping member by a radial expansion due to its axial compression

Abstract

Device for assembling an internal tube (2) sliding inside an external tube (3), allowing their length to be adjusted by compression and expansion, inside the said external tube (3), of a cylindrical elastic block (10) secured to the end of the said internal tube (2). The elastic block (10) exhibits a diameter slightly less than the internal diameter of the external tube (3) and includes, at its surface, reliefs (11), the crests of which are inscribed inside a circle of diameter slightly greater than the internal diameter of the said external tube (3), the elastic block (10) being traversed by a screw (12) allowing compression, and therefore expansion, of the said elastic block (10) to be provided.

Description

La présente invention a pour objet un dispositif d'assemblage d'un tube coulissant dans un autre, notamment en vue du réglage en longueur d'un appareil d'aide à la marche. The present invention relates to a device for assembling a sliding tube into another, in particular with a view to adjusting the length of a walking aid device.

On sait qu'un appareil d'aide à la marche doit être adapté à la morphologie de l'utilisateur, notamment à sa taille. It is known that a walking aid device must be adapted to the morphology of the user, in particular to its size.

Généralement, ces appareils comportent deux tubes téléscopiques, dont l'un est percé à intervalles réguliers sur une longueur donnée, de trous diamétraux, l'autre tube étant doté d'un système de blocage constitué soit d'un ergot rétractable soit d'un trou diamétral dans lequel on insère une vis ou une goupille, après alignement avec celui des trous diamétraux du premier tube correspondant au réglage voulu. Generally, these devices comprise two telescopic tubes, one of which is drilled at regular intervals over a given length, with diametrical holes, the other tube being provided with a locking system consisting either of a retractable lug or of a diametral hole into which a screw or pin is inserted, after alignment with that of the diametral holes of the first tube corresponding to the desired setting.

Ce type d'appareils présente l'inconvénient que d'une part le réglage n'est qu'approximatif, que d'autre part la série de perçages fragilise le tube, et qu'enfin l'amplitude de réglage étant limitée, le fabricant doit concevoir des appareils comportant des tubes de différentes longueurs. This type of apparatus has the disadvantage that on the one hand the adjustment is only approximate, that on the other hand the series of holes weakens the tube, and that finally the amplitude of adjustment being limited, the manufacturer must design devices with tubes of different lengths.

Pour tenter de remédier à ces inconvénients, un dispositif de blocage a été proposé dans la demande de brevet 69.32853. Dans ce dispositif, le blocage d'un premier tube coulissant dans un deuxième s'effectue par la compression et l'expansion, dans ce dernier, d'un bloc cylindrique en matière élastique, qui se déforme transversalement par vissage du premier sur une vis traversant longitudinalement ledit bloc cylindrique, dont elle est solidaire, ladite vis devant être immobilisée pendant toute la durée de l'opération. In an attempt to remedy these drawbacks, a blocking device has been proposed in patent application 69.32853. In this device, the blocking of a first sliding tube in a second takes place by compression and expansion, in the latter, of a cylindrical block of elastic material, which deforms transversely by screwing the first on a screw longitudinally passing through said cylindrical block, of which it is integral, said screw having to be immobilized throughout the duration of the operation.

Pour permettre l'immobilisation de la vis lors du vissage du tube intérieur, le bloc élastique doit adhérer aux parois intérieures du tube dans lequel il est engagé et, à cet effet doit être d'un diamètre légèrement supérieur au diamètre dudit tube. Toutefois, du fait de l'importante surface d'appui du bloc contre les parois internes du tube, le coulissement des deux tubes s'effectue très difficilement, d'où une utilisation mal aisée. To allow immobilization of the screw during the screwing of the inner tube, the elastic block must adhere to the inner walls of the tube in which it is engaged and, for this purpose must be of a diameter slightly greater than the diameter of said tube. However, because of the large bearing surface of the block against the internal walls of the tube, the sliding of the two tubes is very difficult, which makes it difficult to use.

La présente invention permet de remédier à ces inconvénients en proposant un dispositif qui permet un réglage aisé de la longueur d'un appareil d'aide à la marche.  The present invention overcomes these drawbacks by providing a device which allows easy adjustment of the length of a walking aid device.

te dispositif selon l'invention est du même type que celui de la demande précitée, en ce sens qu'il comporte un bloc cylindrique élastique traversé longitudinalement par une vis dont la tige filetée est vissée dans un écrou solidaire de l'extrémité du tube intérieur, permettant ainsi la compression radiale du bloc élastique. The device according to the invention is of the same type as that of the aforementioned application, in that it comprises an elastic cylindrical block traversed longitudinally by a screw whose threaded rod is screwed in a nut secured to the end of the inner tube , thus allowing the radial compression of the elastic block.

Afin que d'une part le bloc élastique coulisse parfaitement dans le tube extérieur et que d'autre part il adhère suffisamment aux parois dudit tube pour permettre le serrage, le bloc élastique est constitué d'un corps cylindrique de diamètre légèrement inférieur au diamètre intérieur du tube extérieur et dont la surface comporte des reliefs régulièrement répartis de manière que le cylindre où ils sont inscrits présente un diamètre légèrement supérieur au diamètre intérieur du tube extérieur. So that on the one hand the elastic block slides perfectly in the outer tube and on the other hand it adheres sufficiently to the walls of said tube to allow tightening, the elastic block consists of a cylindrical body with a diameter slightly smaller than the internal diameter of the outer tube and the surface of which has reliefs regularly distributed so that the cylinder where they are inscribed has a diameter slightly greater than the inner diameter of the outer tube.

Lesdits reliefs permettent le coulissement des deux tubes l'un dans l'autre, autorisant un réglage aisé de la longueur des tubes, mais créent toutefois une adhérence suffisante pour assurer le blocage du bloc élastique lors de l'opération de vissage par laquelle ledit bloc est comprimé, ce qui entraîne son expansion. Said reliefs allow the two tubes to slide one inside the other, allowing easy adjustment of the length of the tubes, but nevertheless create sufficient adhesion to block the elastic block during the screwing operation by which said block is compressed, causing it to expand.

Les avantages et les caractéristiques de la présente invention ressortiront plus clairement de la description qui suit et qui se rapporte au dessin annexé, lequel en représente un mode de réalisation non limitatif. The advantages and characteristics of the present invention will emerge more clearly from the description which follows and which refers to the appended drawing, which represents a non-limiting embodiment thereof.

Dans le dessin annexé
- la figure 1 représente le dispositif d'assemblage selon l'invention, vu en élévation et en éclaté.
In the attached drawing
- Figure 1 shows the assembly device according to the invention, seen in elevation and exploded.

- la figure 2 représente une vue en coupe du même dispositif selon l'axe XX' de la figure 1. - Figure 2 shows a sectional view of the same device along the axis XX 'of Figure 1.

- les figures 3a et 3b représentent deux variantes de ce dispositif. - Figures 3a and 3b show two variants of this device.

Si on se réfère à la figure 1 on peut voir que l'extrémité supérieure d'un tube intérieur 2 comporte un embout 20, percé axialement d'un trou fileté 21, dans lequel peut être serrée une vis 12 traversant successivement une rondelle dentelée 15, une rondelle plate 13, une première rondelle dentelée 16, un bloc cylindrique 10, une deuxième rondelle dentelée 17, une rondelle plate 14, cet ensemble constituant le dispositif de blocage 1. Referring to Figure 1 we can see that the upper end of an inner tube 2 has a nozzle 20, axially pierced with a threaded hole 21, in which can be tightened a screw 12 successively passing through a serrated washer 15 , a flat washer 13, a first serrated washer 16, a cylindrical block 10, a second serrated washer 17, a flat washer 14, this assembly constituting the locking device 1.

L'ensemble composant ledit dispositif de blocage 1 et le tube 2 peut être engagé, par son extrémité, dans un tube extérieur 3 dont le diamètre interne est supérieur au diamètre externe du tube 2 et du bloc cylindrique 10, mais inférieur au diamètre du cylindre dans lequel sont inscrits les sommets des reliefs régulièrement répartis à la surface dudit bloc 10, et qui sont en ltoccurence des saillies longitudinales 11. The assembly comprising said blocking device 1 and the tube 2 can be engaged, at its end, in an external tube 3 whose internal diameter is greater than the external diameter of the tube 2 and of the cylindrical block 10, but less than the diameter of the cylinder in which are inscribed the tops of the reliefs regularly distributed over the surface of said block 10, and which in fact are longitudinal projections 11.

Si on se réfère à la figure 2 on voit que les sommets des saillies longitudinales 11 sont inscrits dans un cylindre 18 de diamètre légèrement supérieur au diamètre interne du tube extérieur 3, en sorte qu'ils sont comprimés à l'intérieur dudit tube 3 lorsque l'assemblage est réalisé. Referring to Figure 2 we see that the vertices of the longitudinal projections 11 are inscribed in a cylinder 18 of diameter slightly greater than the internal diameter of the outer tube 3, so that they are compressed inside said tube 3 when assembly is carried out.

Si on se réfère aux figure 3a et 3b on voit que les reliefs peuvent être d'une part de forme différente, comme en figure 3a où les saillies 11' sont de forme hélicoïdale, d'autre part de structure différente, comme en figure 3b où les reliefs sont des picots, ces exemples n'étant pas limitatifs.  If we refer to Figure 3a and 3b we see that the reliefs can be on the one hand of different shape, as in Figure 3a where the projections 11 'are helical, on the other hand of different structure, as in Figure 3b where the reliefs are spikes, these examples not being limiting.

Claims (1)

REVENDICATION  CLAIM Dispositif d'assemblage d'un tube intérieur (2) coulissant dans un tube extérieur (3), permettant leur réglage en longueur par compression et expansion, dans ledit tube extérieur (3), d'un bloc élastique cylindrique (10) solidarisé à l'extrémité dudit tube intérieur ' (2), caractérisé en ce que ledit bloc élastique (10) présente un diamètre légèrement inférieur au diamètre intérieur du tube extérieur (3) et comporte à sa surface des reliefs (11) dont les sommets sont inscrits dans un cylindre de diamètre légèrement supérieur au diamètre intérieur dudit tube extérieur (3), le bloc élastique (10) étant traversé par une vis (12) permettant d'assurer la compression et donc l'expansion dudit bloc élastique (10).  Device for assembling an inner tube (2) sliding in an outer tube (3), allowing their length adjustment by compression and expansion, in said outer tube (3), of a cylindrical elastic block (10) secured to the end of said inner tube '(2), characterized in that said elastic block (10) has a diameter slightly less than the inner diameter of the outer tube (3) and has reliefs (11) on its surface, the vertices of which are inscribed in a cylinder with a diameter slightly greater than the inside diameter of said outer tube (3), the elastic block (10) being traversed by a screw (12) making it possible to ensure compression and therefore the expansion of said elastic block (10).
FR9013152A 1990-10-19 1990-10-19 Device for assembling two tubes for the purpose of adjusting their length Pending FR2668213A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR9013152A FR2668213A1 (en) 1990-10-19 1990-10-19 Device for assembling two tubes for the purpose of adjusting their length

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9013152A FR2668213A1 (en) 1990-10-19 1990-10-19 Device for assembling two tubes for the purpose of adjusting their length

Publications (1)

Publication Number Publication Date
FR2668213A1 true FR2668213A1 (en) 1992-04-24

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Family Applications (1)

Application Number Title Priority Date Filing Date
FR9013152A Pending FR2668213A1 (en) 1990-10-19 1990-10-19 Device for assembling two tubes for the purpose of adjusting their length

Country Status (1)

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FR (1) FR2668213A1 (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2503997A (en) * 1947-05-17 1950-04-11 Edward H Hopkins Adjustable tripod leg
US2542967A (en) * 1947-07-12 1951-02-20 Paul Benninghofen And Eleanor Telescopic tube locking means
US4563118A (en) * 1982-02-09 1986-01-07 Gunnar Liljedahl Expanding means

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2503997A (en) * 1947-05-17 1950-04-11 Edward H Hopkins Adjustable tripod leg
US2542967A (en) * 1947-07-12 1951-02-20 Paul Benninghofen And Eleanor Telescopic tube locking means
US4563118A (en) * 1982-02-09 1986-01-07 Gunnar Liljedahl Expanding means

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