EP0669434A1 - Telescopic strut - Google Patents

Telescopic strut Download PDF

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Publication number
EP0669434A1
EP0669434A1 EP94420369A EP94420369A EP0669434A1 EP 0669434 A1 EP0669434 A1 EP 0669434A1 EP 94420369 A EP94420369 A EP 94420369A EP 94420369 A EP94420369 A EP 94420369A EP 0669434 A1 EP0669434 A1 EP 0669434A1
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EP
European Patent Office
Prior art keywords
tube
rod
forestay
internal body
external
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EP94420369A
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German (de)
French (fr)
Inventor
Michel Rioual
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Individual
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Individual
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Publication date
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Publication of EP0669434A1 publication Critical patent/EP0669434A1/en
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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04F—FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS
    • E04F21/00—Implements for finishing work on buildings
    • E04F21/18—Implements for finishing work on buildings for setting wall or ceiling slabs or plates
    • E04F21/1805—Ceiling panel lifting devices

Definitions

  • the present invention relates to a forestay, also called support jack, that is to say a provisional longitudinal support and frequently vertical, and more particularly to a telescopic forestay of adjustable length.
  • support struts comprising a first lower tube in which a second upper tube can slide, fixed in position by a bolt-bolt passing through these two tubes.
  • a rough height adjustment is made by inserting the bolt-lock into one of the holes in the upper tube, then a fine adjustment is made by placing one or more shims under the lower tube.
  • Document EP 0 390 128 discloses a telescopic stay comprising a height adjustment nut surmounted by a rotary lowering sleeve whose upper edge is in a spiral, this assembly being screwed onto a thread formed at the end of the external lower tube .
  • a bolt-bolt resting axially on the lowering sleeve passes through the external tube through an oblong hole made at the level of the upper thread.
  • the height adjustment is then carried out by turning the adjusting nut along the thread, and the compression of the forestay is carried out by then turning the sleeve which mounts the bolt, therefore the upper tube.
  • the object of the present invention is a light telescopic strut, the compression of which and the prior height adjustment of which are easy so that it can be implemented quickly and therefore frequently.
  • a forestay comprising one or more lower tubes screwed end-to-end, and at the end of which slides an upper tube because the upper tube is external and because it also comprises a body internal integral which slides along a central rod extending the last lower tube; an elastic means, such as a spring, acting between the end of the lower tube and the internal body; and a device for temporarily locking the internal body of the rod in a position such that the elastic means is compressed.
  • the number of lower tubes is established so that the end of this upper tube is little below the part or part to be supported. This forestay is easily moved from one place to another.
  • the implementation of the forestay in its new position simply consists of unlocking the internal body of the rod.
  • the external upper tube sliding over the last lower tube, and this along the central rod which extends it, is then pushed upwards by the spring until it makes contact and supports the part.
  • the short lower tubes have a length of the order of 0.5 to 0.6 meters
  • the long lower tubes have a length of the order of 1.0 to 1.2 meters
  • the upper sliding tube has a length of the order of 1.2 meters, allowing, by association, to approach any given height.
  • these tubes have an external diameter between 20 and 50 millimeters for a thickness between 1 and 4 millimeters; and are made of metal, preferably aluminum for weight considerations: a forestay then weighing only about 1 kilogram.
  • the device for locking the body internal to the rod may comprise a cylindrical trigger passing radially and slidingly through the internal body, the internal end of the trigger being capable of penetrating into a transverse groove of the rod, the external end of the trigger being pressed inwards by a return means, such as a leaf spring screwed onto the side wall of the body, and capable of being lifted by the internal arm of a lever, the external arm of which can be actuated by the user, if desired through an apprehension button.
  • a return means such as a leaf spring screwed onto the side wall of the body
  • Locking the forestay then simply involves pulling the upper tube towards the lower tubes against the effect of the spring, until the trigger falls into the groove of the rod. Conversely, by acting on the lever, the trigger is easily removed from the groove thus separating the rod and the body which is then pushed up by the spring.
  • an elastic damping means such as a spring or a rubber tube, is installed between the upper end of the internal body and a stop screwed to the upper end of the rod.
  • the internal body is secured to the upper tube by means of a clamping screw, the rod of which passes through the tube through a longitudinal opening and is engaged in a radial tapping of the body, and the external head of which presses against the external wall of the tube.
  • the external head of the screw is winged or butterfly or, alternatively, round or flat of sufficient size. to allow easy handling.
  • a curved washer can be inserted under the screw head against the tube to increase the holding friction forces induced during tightening.
  • this clamping screw allows you to take full advantage of the thrust of the power spring.
  • the value of this spring is limited by the maximum traction that an average user can exert, and is established at a value of the order of 5 to 15 kilograms which is then the maximum weight of the part or part which can then be supported. by the forestay.
  • forestay is more particularly designed for repetitive work of interior design such as the installation of paneling, frieze or other internal decorations.
  • the forestay according to the invention can be provided with specific end caps depending on the nature of the work.
  • a nozzle for supporting a flat part comprises a vertical sleeve engaged in the end of the upper tube and connected by a horizontal hinge to an upper support plate, the hinge being able to be locked in tightening by a screw constituting its axis of rotation and whose head is winged or butterfly or, alternatively, round or flat of sufficient size to allow easy handling.
  • the support plate forming an integral part of the stay is wide enough not to damage the part to be supported, and can be tilted for work in attics.
  • the retaining plate is supplemented by a secondary lateral plate whose protruding end of the lower spar acting as knuckle is connected by a clamping screw to the end in correspondence of a lower spar of the retaining plate, this end also serving as knuckle.
  • One of the knuckles may have an oblong orifice for adjusting the spacing of the two plates.
  • the retaining plate includes, in its thickness, an internal through channel, one of the outputs of which can be connected to a suction tube.
  • the retaining tip acts simultaneously as a popular vacuum cleaner tip if holes must be drilled cleanly.
  • FIG. 1 illustrates the upper tube 10 of a forestay sliding over a lower tube 12.
  • the upper end of the tube 10 ends in a rubber end piece 100, while the lower end of the tube 12 rests on the ground through from a base, or is screwed to another lower tube.
  • the diameter of these tubes can be reduced to a value between 20 and 50 millimeters for a thickness between 1 and 4 millimeters when made of metal. More particularly, this forestay is made of aluminum with an outside diameter equal to 25 millimeters and a thickness equal to 2 millimeters, such a forestay 2.6 meters long then being particularly light, of the order of a kilogram.
  • this forestay is made of aluminum with an outside diameter equal to 25 millimeters and a thickness equal to 2 millimeters, such a forestay 2.6 meters long then being particularly light, of the order of a kilogram.
  • a central rod 20 is connected to the male end piece 13 of the lower tube 12 by means of a female-female threaded connection 22.
  • a body 30 in the form of two cylindrical parts arranged one above the other and connected by a median tubular joint.
  • the upper tube 10 is securely fixed to the lower part of the body 30 by tightening a screw 50 whose threaded axis passes through a longitudinal opening 14 of the upper tube 10 to be engaged in a radial orifice formed in this part lower body 30, and the head of which bears against an outer washer 52 applied against the tube.
  • the body 30 is also pushed upwards by a power spring 40 acting between a bearing surface of the connector 22 and a bearing formed at the lower end of this body 30.
  • a damping spring 42 acting between the upper part of the body 30 and a stop head 44 screwed to the end of the rod 20 prevents any too rapid movement of this body.
  • the upper part of the body 30 comprises a device for locking this body to the rod 20.
  • the rod has a median transverse groove 24.
  • a trigger 60 being in the form of a cylindrical axis, can slide in a radial housing of the body.
  • the height of this trigger 60 is slightly less than the height of the groove 24 so that it can be installed there once vis-à-vis, and this under the action of a lowering spring 66 acting on the outer end.
  • This spring 66 may be in the form of a spring leaf screwed vertically against the external wall of the upper part of the body 30 within the longitudinal opening 14 of the upper tube 10.
  • a lever 62 comprises a internal arm inserted under the lowering spring 66, while the external arm is prominent, in particular supplemented with a button 64 for actuation by a user. Pressing this external lever in the direction of the forestay therefore spreads the internal branch, which pulls the trigger 60 out of the groove 24.
  • the forestay according to the invention is used in the following manner.
  • the body / tube locking screw 50 being tightened, the upper tube 10 is pulled down by compressing the power spring 40, until the trigger 60 is brought opposite the transverse groove 24 of the rod where it snaps.
  • the body 30 being temporarily secured to the rod 20, it is then possible to loosen the screw 50.
  • the base of the stay is placed vertically on the part to be supported, and the upper tube is manually raised until the end piece 100 comes into contact with this part.
  • the screw 50 is then again tightened firmly again ensuring a rigid connection between the body 30 and the upper tube 10.
  • This spring is established as required so that its thrust is at least twice the weight of the part to be maintained without being unnecessarily too strong not to destroy it.
  • a plaster molding or simple frizzles will be held with a thrust limited to 3 kilograms, while paneling or plasterboard constituting ceilings will require a safety thrust of the order of 10 kilograms.
  • FIG. 2 illustrates a tip-plate 200 constituting a variant of the tip 100 of FIG. 1.
  • This endpiece 200 comprises a sleeve 230 intended to be engaged over the upper end of the tube 10.
  • This sleeve 230 is transformed upwards into a female knuckle 232 receiving the male knuckle 240 from an upper support plate 210.
  • the hinge is completed by an axis 220 whose threaded end penetrates into one of the branches of the female knuckle 232.
  • This axis comprises a head 222 allowing a tightening of the hinge for locking in a desired position, for example a butterfly head as illustrated .
  • the upper plate 210 can be used horizontally or inclined at any angle desired for work in the attic.
  • the end piece 200 can be completed by a secondary plate 260.
  • the base plate 210 comprises a lower spar 216 having a longitudinal opening 217 through which passes an axis 221 of connection with the end of a spar lower 262 of the secondary plate 260.
  • the axis 221 comprises at one end a thread engaged in a tapping of the beam, the head 223 being with fins or butterfly to facilitate tightening.
  • Such a tip 200 makes it possible to hold two separate pieces at a very precise angle, which is often the case during the frizz break.
  • FIG. 3 illustrates a tip 300 which, as in the previous example, comprises a sleeve 330 linked to a support plate 310 by a hinge comprising a sleeve knuckle 332, a plate knuckle 340, the whole connected by a pin of tightening 320, the head 322 of which comprises fins.
  • the plate 310 comprises a suction chamber 313 whose mouth is substantially as wide as the plate apart from the thickness of the side walls, and which gradually narrows towards a conduit 312.
  • the upstream outlet of this conduit 312 gives into an elbow 314 to which is connected, from the outside, a flexible pipe 360 connected to a conventional vacuum cleaner.
  • This connection from the outside prevents unnecessary accumulation of collected dirt.
  • the upper edge of the mouth 315 of the suction chamber 313 is chamfered upwards to reduce to a line, which ensures the collection of all of the close dust stuck to the ceiling or on the room to be to stare.
  • This tip therefore proves to be particularly useful for sucking up the dust and debris created during the drilling of a hole in the immediate region of the downstream mouth. Because the forestay is easy Reinstallable from one place to another, the user no longer hesitates to use a vacuum cleaner in the event of repetitive drilling.
  • An accessory not illustrated may consist of a clip which snaps orthogonally over the upper or lower tube, this clip comprising a stump to receive the sleeve 230 or 330 of the end piece 200 or 300.
  • this end pieces can be used not only against a ceiling, but also against a wall.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Electric Vacuum Cleaner (AREA)

Abstract

The strut comprises a lower tube (12) at the end of which slides an upper external tube (10). The upper tube has an internal body (30) which slides along a central rod (20) extending from the lower tube. A spring (40) acts between the end of the lower tube and the internal body. The lower tube has a length between 0.5 and 1.2 m and the upper sliding tube a length of about 1.2 m. These tubes have an external diameter between 20 and 50 mm for a thickness between 1 and 4 mm. Temporary locking of the internal body to the rod, with the spring compressed, is by means of a tumbler (60) which passes radially through the internal body.

Description

La présente invention est relative à un étai, également appelé chandelle de soutènement, c'est-à-dire à un support longitudinal provisoire et fréquemment vertical, et plus particulièrement à un étai télescopique de longueur réglable.The present invention relates to a forestay, also called support jack, that is to say a provisional longitudinal support and frequently vertical, and more particularly to a telescopic forestay of adjustable length.

On connaît, dans le domaine des échafaudages, des étais de soutènement comprenant un premier tube inférieur dans lequel peut coulisser un second tube supérieur fixé en position par un boulon-verrou traversant ces deux tubes. Un réglage grossier en hauteur s'effectue en insérant le boulon-verrou dans l'un des orifices du tube supérieur, puis un réglage fin s'effectue en plaçant une ou plusieurs cales sous le tube inférieur.In the field of scaffolding, support struts are known comprising a first lower tube in which a second upper tube can slide, fixed in position by a bolt-bolt passing through these two tubes. A rough height adjustment is made by inserting the bolt-lock into one of the holes in the upper tube, then a fine adjustment is made by placing one or more shims under the lower tube.

Le document EP 0 390 128 divulgue un étai télescopique comprenant un écrou de réglage en hauteur surmonté d'un manchon d'abaissement rotatif dont le bord supérieur est en spirale, cet ensemble étant vissé sur un filetage ménagé à l'extrémité du tube inférieur externe. Un boulon- verrou s'appuyant axialement sur le manchon d'abaissement traverse le tube externe par un trou oblong ménagé au niveau du filetage supérieur. Le réglage en hauteur s'effectue alors en tournant l'écrou de réglage le long du filetage, et la mise en compression de l'étai s'effectue en tournant ensuite le manchon qui monte le boulon, donc le tube supérieur.Document EP 0 390 128 discloses a telescopic stay comprising a height adjustment nut surmounted by a rotary lowering sleeve whose upper edge is in a spiral, this assembly being screwed onto a thread formed at the end of the external lower tube . A bolt-bolt resting axially on the lowering sleeve passes through the external tube through an oblong hole made at the level of the upper thread. The height adjustment is then carried out by turning the adjusting nut along the thread, and the compression of the forestay is carried out by then turning the sleeve which mounts the bolt, therefore the upper tube.

Toutefois, ces étais de chantier doivent être solides pour supporter des charges importantes, et sont donc lourds et peu maniables. Ils ne sont guère utilisables pour des petits travaux d'aménagement intérieur.However, these struts must be strong to support heavy loads, and are therefore heavy and unwieldy. They are hardly suitable for small interior fitting works.

Le but de la présente invention est un étai télescopique léger dont la mise en compression et dont le réglage préalable de la hauteur soient aisés afin de pouvoir être mis en oeuvre rapidement, donc fréquemment.The object of the present invention is a light telescopic strut, the compression of which and the prior height adjustment of which are easy so that it can be implemented quickly and therefore frequently.

Ce but est atteint grâce à un étai comprenant un ou plusieurs tubes inférieurs vissés bout-à-bout, et à l'extrémité duquel coulisse un tube supérieur du fait que le tube supérieur est externe et du fait qu'il comprend de plus un corps interne solidaire qui coulisse le long d'une tige centrale prolongeant le dernier tube inférieur ; un moyen élastique, tel qu'un ressort, agissant entre l'extrémité du tube inférieur et le corps interne ; ainsi qu'un dispositif permettant de verrouiller provisoirement le corps interne à la tige en une position telle que le moyen élastique soit comprimé.This object is achieved thanks to a forestay comprising one or more lower tubes screwed end-to-end, and at the end of which slides an upper tube because the upper tube is external and because it also comprises a body internal integral which slides along a central rod extending the last lower tube; an elastic means, such as a spring, acting between the end of the lower tube and the internal body; and a device for temporarily locking the internal body of the rod in a position such that the elastic means is compressed.

Initialement, le tube supérieur étant verrouillé au dernier tube inférieur par la liaison corps inter- ne/tige et le ressort de puissance étant en compression, le nombre de tubes inférieurs est établi de telle sorte que l'extrémité de ce tube supérieur se retrouve peu en dessous de la pièce ou de la partie à soutenir. On déplace alors aisément cet étai d'un endroit à l'autre.Initially, the upper tube being locked to the last lower tube by the internal body / rod connection and the power spring being in compression, the number of lower tubes is established so that the end of this upper tube is little below the part or part to be supported. This forestay is easily moved from one place to another.

La mise en oeuvre de l'étai en sa nouvelle position consiste simplement à déverrouiller le corps interne de la tige. Le tube supérieur externe coulissant par dessus le dernier tube inférieur, et ce le long de la tige centrale qui le prolonge, est alors poussé vers le haut par le ressort jusqu'à prendre contact et soutenir la pièce.The implementation of the forestay in its new position simply consists of unlocking the internal body of the rod. The external upper tube sliding over the last lower tube, and this along the central rod which extends it, is then pushed upwards by the spring until it makes contact and supports the part.

Pour dégager l'étai, on ramène le tube supérieur vers le bas jusqu'à ré-enclencher le verrouillage du corps interne à la tige, et ce en re-comprimant le ressort, l'étai à nouveau plus court pouvant à nouveau être déplacé.To release the forestay, we bring the upper tube down until the internal body lock is re-engaged to the rod, and this by re-compressing the spring, the forestay again shorter being able to be moved again .

De préférence, les tubes inférieurs courts ont une longueur de l'ordre de 0,5 à 0,6 mètre, les tubes inférieurs longs ont une longueur de l'ordre de 1,0 à 1,2 mètre, et le tube supérieur coulissant a une longueur de l'ordre de 1,2 mètre, permettant, par association, de s'approcher de n'importe quelle hauteur donnée. Utilement, ces tubes présentent un diamètre externe compris entre 20 et 50 millimètres pour une épaisseur comprise entre 1 et 4 millimètres ; et sont réalisés en métal, de préférence, en aluminium pour des considérations de poids : un étai pesant alors seulement environ 1 kilogramme.Preferably, the short lower tubes have a length of the order of 0.5 to 0.6 meters, the long lower tubes have a length of the order of 1.0 to 1.2 meters, and the upper sliding tube has a length of the order of 1.2 meters, allowing, by association, to approach any given height. Usefully, these tubes have an external diameter between 20 and 50 millimeters for a thickness between 1 and 4 millimeters; and are made of metal, preferably aluminum for weight considerations: a forestay then weighing only about 1 kilogram.

Le dispositif de verrouillage du corps interne à la tige peut comprendre une gâchette cylindrique traversant radialement et en coulissement le corps interne, l'extrémité interne de la gâchette étant susceptible de pénétrer dans une rainure transversale de la tige, l'extrémité externe de la gâchette étant appuyée vers l'intérieur par un moyen de rappel, tel qu'une lame-ressort vissée sur la paroi latérale du corps, et susceptible d'être levée par le bras interne d'un levier dont le bras externe peut être actionné par l'utilisateur, si désiré au travers d'un bouton d'appréhension.The device for locking the body internal to the rod may comprise a cylindrical trigger passing radially and slidingly through the internal body, the internal end of the trigger being capable of penetrating into a transverse groove of the rod, the external end of the trigger being pressed inwards by a return means, such as a leaf spring screwed onto the side wall of the body, and capable of being lifted by the internal arm of a lever, the external arm of which can be actuated by the user, if desired through an apprehension button.

Le verrouillage de l'étai consiste alors simplement à tirer sur le tube supérieur vers les tubes inférieurs contre l'effet du ressort, et ce jusqu'à ce que la gâchette tombe dans la rainure de la tige. A l'inverse, en agissant sur le levier, on retire aisément la gâchette hors de la rainure désolidarisant ainsi la tige et le corps qui est alors repoussé vers le haut par le ressort.Locking the forestay then simply involves pulling the upper tube towards the lower tubes against the effect of the spring, until the trigger falls into the groove of the rod. Conversely, by acting on the lever, the trigger is easily removed from the groove thus separating the rod and the body which is then pushed up by the spring.

Si désiré, un moyen élastique d'amortissement, tel qu'un ressort ou un tube de caoutchouc, est installé entre l'extrémité supérieure du corps interne et une butée vissée à l'extrémité supérieure de la tige.If desired, an elastic damping means, such as a spring or a rubber tube, is installed between the upper end of the internal body and a stop screwed to the upper end of the rod.

De préférence, le corps interne est solidarisé au tube supérieur au moyen d'une vis de serrage dont la tige traverse le tube par une ouverture longitudinale et est engagée dans un taraudage radial du corps, et dont la tête externe appuie contre la paroi externe du tube. Utilement, la tête externe de la vis est à ailettes ou à papillon ou, en alternative, ronde ou plate de dimension suffisante pour permettre une manipulation aisée. Utilement encore, une rondelle incurvée peut être insérée sous la tête de vis contre le tube pour augmenter les forces de friction de maintien induites lors du serrage.Preferably, the internal body is secured to the upper tube by means of a clamping screw, the rod of which passes through the tube through a longitudinal opening and is engaged in a radial tapping of the body, and the external head of which presses against the external wall of the tube. Usefully, the external head of the screw is winged or butterfly or, alternatively, round or flat of sufficient size. to allow easy handling. Also usefully, a curved washer can be inserted under the screw head against the tube to increase the holding friction forces induced during tightening.

Ainsi, le corps étant préalablement verrouillé à la tige, on peut momentanément desserrer cette vis de serrage pour déplacer verticalement le tube supérieur par rapport au corps, et ajuster ainsi la hauteur finale de l'étai. Ce réglage fin de la hauteur permet de profiter pleinement de la poussée du ressort de puissance. La valeur de ce ressort est limitée par la traction maximum que peut exercer un utilisateur moyen, et est établie à une valeur de l'ordre de 5 à 15 kilogrammes qui est alors le poids maximum de la pièce ou de la partie pouvant alors être soutenu par l'étai.Thus, the body being previously locked to the rod, one can momentarily loosen this clamping screw to vertically move the upper tube relative to the body, and thus adjust the final height of the forestay. This fine height adjustment allows you to take full advantage of the thrust of the power spring. The value of this spring is limited by the maximum traction that an average user can exert, and is established at a value of the order of 5 to 15 kilograms which is then the maximum weight of the part or part which can then be supported. by the forestay.

Du fait de sa maniabilité, un tel étai est plus particulièrement conçu pour des travaux répétitifs d'aménagement d'intérieur tels que la pose de lambris, frisette ou autre décorations internes. L'étai selon l'invention peut être muni d'embouts spécifiques selon la nature des travaux.Because of its maneuverability, such a forestay is more particularly designed for repetitive work of interior design such as the installation of paneling, frieze or other internal decorations. The forestay according to the invention can be provided with specific end caps depending on the nature of the work.

Selon un mode de réalisation, un embout pour soutenir une pièce plane comprend un manchon vertical engagé dans l'extrémité du tube supérieur et relié par une charnière horizontale à une plaque supérieure de soutènement, la charnière pouvant être bloquée en serrage par une vis constituant son axe de rotation et dont la tête est à ailettes ou à papillon ou, en alternative, ronde ou plate de dimension suffisante pour permettre une manipulation aisée.According to one embodiment, a nozzle for supporting a flat part comprises a vertical sleeve engaged in the end of the upper tube and connected by a horizontal hinge to an upper support plate, the hinge being able to be locked in tightening by a screw constituting its axis of rotation and whose head is winged or butterfly or, alternatively, round or flat of sufficient size to allow easy handling.

Ainsi, la plaque de soutènement faisant partie intégrante de l'étai est suffisamment large pour ne pas endommager la pièce à soutenir, et peut être inclinée pour des travaux dans des soupentes.Thus, the support plate forming an integral part of the stay is wide enough not to damage the part to be supported, and can be tilted for work in attics.

Utilement, la plaque de soutènement est complétée d'une plaque latérale secondaire dont l'extrémité protubérante du longeron inférieur faisant office de charnon est reliée par une vis de serrage à l'extrémité en correspondance d'un longeron inférieur de la plaque de soutènement, cette extrémité faisant également office de charnon. L'un des charnons peut présenter un orifice oblong pour un réglage en écartement des deux plaques.Usefully, the retaining plate is supplemented by a secondary lateral plate whose protruding end of the lower spar acting as knuckle is connected by a clamping screw to the end in correspondence of a lower spar of the retaining plate, this end also serving as knuckle. One of the knuckles may have an oblong orifice for adjusting the spacing of the two plates.

Utilement, la plaque de soutènement comprend, dans son épaisseur, un canal interne traversant dont l'une des sorties peut être reliée à un tube d'aspiration. Ainsi, l'embout de soutènement fait simultanément office d'embout d'aspirateur très apprécié si des trous doivent être percés en toute propreté.Usefully, the retaining plate includes, in its thickness, an internal through channel, one of the outputs of which can be connected to a suction tube. Thus, the retaining tip acts simultaneously as a popular vacuum cleaner tip if holes must be drilled cleanly.

L'invention sera mieux comprise à l'étude d'un mode de réalisation pris à titre nullement limitatif et décrit par les figures suivantes :

  • - la figure 1 est une vue en coupe verticale longitudinale de l'étai,
  • - la figure 2 est une vue en coupe verticale d'un embout de l'étai, et
  • - la figure 3 est une vue en coupe verticale d'un embout aspirant de l'étai.
The invention will be better understood from the study of an embodiment taken without any limitation being implied and described by the following figures:
  • FIG. 1 is a view in longitudinal vertical section of the forestay,
  • FIG. 2 is a view in vertical section of a tip of the forestay, and
  • - Figure 3 is a vertical sectional view of a suction nozzle of the forestay.

La figure 1 illustre le tube supérieur 10 d'un étai coulissant par dessus un tube inférieur 12. L'extrémité supérieure du tube 10 se termine par un embout 100 en caoutchouc, alors que l'extrémité inférieure du tube 12 repose au sol au travers d'un embout de base, ou est vissée à un autre tube inférieur.FIG. 1 illustrates the upper tube 10 of a forestay sliding over a lower tube 12. The upper end of the tube 10 ends in a rubber end piece 100, while the lower end of the tube 12 rests on the ground through from a base, or is screwed to another lower tube.

Cet étai étant plutôt prévu pour soutenir des pièces ou des parties de décoration de poids inférieur à 10 kilogrammes au cours de travaux d'aménagement d'intérieur, le diamètre de ces tubes peut être réduit à une valeur comprise entre 20 et 50 millimètres pour une épaisseur comprise entre 1 et 4 millimètres lorsque réalisé en métal. Plus particulièrement, cet étai est réalisé en aluminium de diamètre extérieur égal à 25 millimètres et d'épaisseur égale à 2 millimètres, un tel étai de 2,6 mètres de long étant alors particulièrement léger, de l'ordre du kilogramme. On peut envisager de réaliser une pluralité de tubes inférieurs de différentes longueurs : 0,5, 1,0, 1,5 et 2 mètres, chaque tube se terminant en sa partie inférieure par un embout femelle taraudé et en sa partie supérieure par un embout mâle 13 fileté. Ces embouts peuvent soit être vissés dans un filetage de l'extrémité du tube soit être insérés en force.This stay is rather intended to support pieces or parts of decoration weighing less than 10 kilograms during interior fitting work, the diameter of these tubes can be reduced to a value between 20 and 50 millimeters for a thickness between 1 and 4 millimeters when made of metal. More particularly, this forestay is made of aluminum with an outside diameter equal to 25 millimeters and a thickness equal to 2 millimeters, such a forestay 2.6 meters long then being particularly light, of the order of a kilogram. We can consider making a plurality of lower tubes of different lengths: 0.5, 1.0, 1.5 and 2 meters, each tube ending in its lower part by a female threaded end and in its upper part by a end male 13 threaded. These ends can either be screwed into a thread at the end of the tube or be force-fitted.

Comme illustré, une tige centrale 20 est reliée à l'embout mâle 13 du tube inférieur 12 au moyen d'un raccord 22 femelle-femelle taraudé. Le long de cette tige 20 peut coulisser un corps 30 se présentant sous la forme de deux parties cylindriques disposées l'une au-dessus de l'autre et reliées par un joint tubulaire médian.As illustrated, a central rod 20 is connected to the male end piece 13 of the lower tube 12 by means of a female-female threaded connection 22. Along this rod 20 can slide a body 30 in the form of two cylindrical parts arranged one above the other and connected by a median tubular joint.

Le tube supérieur 10 est fixé solidement à la partie inférieure du corps 30 par serrage d'une vis 50 dont l'axe fileté passe au travers d'une ouverture longitudinale 14 du tube supérieur 10 pour être engagée dans un orifice radial ménagé dans cette partie inférieure du corps 30, et dont la tête porte contre une rondelle extérieure 52 appliquée contre le tube.The upper tube 10 is securely fixed to the lower part of the body 30 by tightening a screw 50 whose threaded axis passes through a longitudinal opening 14 of the upper tube 10 to be engaged in a radial orifice formed in this part lower body 30, and the head of which bears against an outer washer 52 applied against the tube.

Le corps 30 est par ailleurs poussé vers le haut par un ressort de puissance 40 agissant entre une portée du raccord 22 et une portée ménagée à l'extrémité inférieure de ce corps 30. De l'autre côté, un ressort d'amortissement 42 agissant entre la partie supérieure du corps 30 et une tête de butée 44 vissée à l'extrémité de la tige 20 prévient tout mouvement trop rapide de ce corps.The body 30 is also pushed upwards by a power spring 40 acting between a bearing surface of the connector 22 and a bearing formed at the lower end of this body 30. On the other side, a damping spring 42 acting between the upper part of the body 30 and a stop head 44 screwed to the end of the rod 20 prevents any too rapid movement of this body.

La partie supérieure du corps 30 comprend un dispositif de verrouillage de ce corps à la tige 20. La tige présente une rainure transversale médiane 24. En correspondance, une gâchette 60, se présentant sous la forme d'un axe cylindrique, peut coulisser dans un logement radial du corps. La hauteur de cette gâchette 60 est légèrement inférieure à la hauteur de la rainure 24 de telle sorte qu'elle puisse s'y installer une fois mise en vis-à-vis, et ce sous l'action d'un ressort d'abaissement 66 agissant sur l'extrémité externe. Ce ressort 66 peut se présenter sous la forme d'une lame ressort vissée verticalement contre la paroi externe de la partie supérieure du corps 30 au sein de l'ouverture longitudinale 14 du tube supérieur 10. D'autre part, un levier 62 comprend un bras interne inséré sous le ressort d'abaissement 66, alors que le bras externe est proéminent, notamment complété d'un bouton 64 pour actionnement par un utilisateur. Un appui sur ce levier externe en direction de l'étai écarte donc la branche interne ce qui tire la gâchette 60 hors de la rainure 24.The upper part of the body 30 comprises a device for locking this body to the rod 20. The rod has a median transverse groove 24. In correspondence, a trigger 60, being in the form of a cylindrical axis, can slide in a radial housing of the body. The height of this trigger 60 is slightly less than the height of the groove 24 so that it can be installed there once vis-à-vis, and this under the action of a lowering spring 66 acting on the outer end. This spring 66 may be in the form of a spring leaf screwed vertically against the external wall of the upper part of the body 30 within the longitudinal opening 14 of the upper tube 10. On the other hand, a lever 62 comprises a internal arm inserted under the lowering spring 66, while the external arm is prominent, in particular supplemented with a button 64 for actuation by a user. Pressing this external lever in the direction of the forestay therefore spreads the internal branch, which pulls the trigger 60 out of the groove 24.

Tel que décrit précédemment, l'étai selon l'invention s'utilise de la manière suivante.As described above, the forestay according to the invention is used in the following manner.

La vis 50 de blocage corps/tube étant serrée, on tire le tube supérieur 10 vers le bas en comprimant le ressort de puissance 40, et ce jusqu'à amener la gâchette 60 en vis-à-vis de la rainure transversale 24 de la tige où elle s'enclenche.The body / tube locking screw 50 being tightened, the upper tube 10 is pulled down by compressing the power spring 40, until the trigger 60 is brought opposite the transverse groove 24 of the rod where it snaps.

Le corps 30 étant provisoirement solidaire de la tige 20, on peut alors desserrer la vis 50. L'axe de cette vis traversant une ouverture longitudinale 14 du tube supérieur 10, on peut faire coulisser ce tube vers le haut ou le bas pour ajuster la hauteur finale de l'étai en fonction de la hauteur de la position de la pièce à soutenir. En d'autres termes, on pose la base de l'étai à la verticale de la pièce à soutenir, et on remonte manuellement le tube supérieur jusqu'à ce que l'embout 100 vienne prendre contact contre cette pièce. La vis 50 est alors à nouveau serrée fermement assurant à nouveau une liaison rigide entre le corps 30 et le tube supérieur 10.The body 30 being temporarily secured to the rod 20, it is then possible to loosen the screw 50. The axis of this screw passing through a longitudinal opening 14 of the upper tube 10, it is possible to slide this tube up or down to adjust the final height of the forestay as a function of the height of the position of the part to be supported. In other words, the base of the stay is placed vertically on the part to be supported, and the upper tube is manually raised until the end piece 100 comes into contact with this part. The screw 50 is then again tightened firmly again ensuring a rigid connection between the body 30 and the upper tube 10.

La hauteur de l'étai étant ainsi établie, il suffit alors d'agir sur le bouton 64 du levier 62 pour lever la gâchette 60 hors de la rainure 24, donc pour dissocier la tige 20 du corps 30 et du tube 10 solidaires qui sont poussés vers le haut par le ressort de puissance 40.The height of the forestay being thus established, it then suffices to act on the button 64 of the lever 62 to lift the trigger 60 out of the groove 24, therefore to dissociate the rod 20 from the body 30 and from the tube 10 which are integral pushed up by the power spring 40.

La puissance de ce ressort est établie en fonction des besoins de telle sorte que sa poussée soit au moins du double du poids de la pièce à maintenir sans être inutilement trop forte pour ne pas la détruire. Ainsi, une moulure en plâtre ou de simples frisettes seront tenues avec une poussée limitée à 3 kilogrammes, alors que des lambris ou des plaques de plâtre constitutifs de plafonds nécessiteront une poussée de sécurité de l'ordre de 10 kilogrammes.The power of this spring is established as required so that its thrust is at least twice the weight of the part to be maintained without being unnecessarily too strong not to destroy it. Thus, a plaster molding or simple frizzles will be held with a thrust limited to 3 kilograms, while paneling or plasterboard constituting ceilings will require a safety thrust of the order of 10 kilograms.

Pour déplacer cet étai d'un endroit à un autre, il suffit de tirer le tube supérieur vers le bas pour le verrouiller à la tige du dernier tube inférieur. L'étai se maintient ainsi en une situation dans laquelle sa longueur est suffisamment réduite pour être enlevé et replacé.To move this forestay from one place to another, just pull the upper tube down to lock it to the rod of the last lower tube. The forestay thus remains in a situation in which its length is reduced enough to be removed and replaced.

La figure 2 illustre un embout-plaque 200 constituant une variante de l'embout 100 de la figure 1.FIG. 2 illustrates a tip-plate 200 constituting a variant of the tip 100 of FIG. 1.

Cet embout 200 comprend un manchon 230 prévu pour être engagé par dessus l'extrémité supérieure du tube 10. Ce manchon 230 se transforme vers le haut en un charnon femelle 232 recevant le charnon mâle 240 d'une plaque supérieure de soutien 210. La charnière est complétée par un axe 220 dont l'extrémité filetée pénètre dans l'une des branches du charnon femelle 232. Cet axe comprend une tête 222 permettant un serrage de la charnière pour blocage en une position voulue, par exemple une tête à papillon comme illustré. Ainsi, la plaque supérieure 210 peut être utilisée à l'horizontale ou inclinée selon tout angle voulu pour un travail en soupente.This endpiece 200 comprises a sleeve 230 intended to be engaged over the upper end of the tube 10. This sleeve 230 is transformed upwards into a female knuckle 232 receiving the male knuckle 240 from an upper support plate 210. The hinge is completed by an axis 220 whose threaded end penetrates into one of the branches of the female knuckle 232. This axis comprises a head 222 allowing a tightening of the hinge for locking in a desired position, for example a butterfly head as illustrated . Thus, the upper plate 210 can be used horizontally or inclined at any angle desired for work in the attic.

Si désiré, l'embout 200 peut être complété par une plaque secondaire 260. Alors, la plaque de base 210 comprend un longeron inférieur 216 présentant un ajour longitudinal 217 au travers duquel passe un axe 221 de liaison avec l'extrémité d'un longeron inférieur 262 de la plaque secondaire 260. Comme précédemment, l'axe 221 comprend en une extrémité un filetage engagé dans un taraudage du longeron, la tête 223 étant à ailettes ou papillon pour faciliter le serrage. Un tel embout 200 permet de tenir deux pièces distinctes selon un angle bien précis, ce qui s'avère souvent le cas lors de la pause de frisette.If desired, the end piece 200 can be completed by a secondary plate 260. Then, the base plate 210 comprises a lower spar 216 having a longitudinal opening 217 through which passes an axis 221 of connection with the end of a spar lower 262 of the secondary plate 260. As previously, the axis 221 comprises at one end a thread engaged in a tapping of the beam, the head 223 being with fins or butterfly to facilitate tightening. Such a tip 200 makes it possible to hold two separate pieces at a very precise angle, which is often the case during the frizz break.

La figure 3 illustre un embout 300 qui, comme dans l'exemple précédent, comprend un manchon 330 lié à une plaque de soutènement 310 par une charnière comprenant un charnon de manchon 332, un charnon de plaque 340, le tout relié par un axe de serrage 320 dont la tête 322 comprend des ailettes.FIG. 3 illustrates a tip 300 which, as in the previous example, comprises a sleeve 330 linked to a support plate 310 by a hinge comprising a sleeve knuckle 332, a plate knuckle 340, the whole connected by a pin of tightening 320, the head 322 of which comprises fins.

Plus particulièrement, la plaque 310 comprend une chambre d'aspiration 313 dont l'embouchure est sensiblement aussi large que la plaque hormis l'épaisseur des parois latérales, et qui se rétrécie progressivement vers un conduit 312. Comme illustré, la sortie amont de ce conduit 312 donne dans un coude 314 auquel est raccordé, par l'extérieur, un tuyau flexible 360 relié à un aspirateur conventionnel. Ce raccord par l'extérieur empêche l'accumulation inutile de saletés récoltées. De manière similaire, le bord supérieur de l'embouchure 315 de la chambre d'aspiration 313 est chanfreiné vers le haut pour se réduire à une ligne, ce qui assure la collecte de la totalité des proches poussières collées au plafond ou sur la pièce à fixer.More particularly, the plate 310 comprises a suction chamber 313 whose mouth is substantially as wide as the plate apart from the thickness of the side walls, and which gradually narrows towards a conduit 312. As illustrated, the upstream outlet of this conduit 312 gives into an elbow 314 to which is connected, from the outside, a flexible pipe 360 connected to a conventional vacuum cleaner. This connection from the outside prevents unnecessary accumulation of collected dirt. Similarly, the upper edge of the mouth 315 of the suction chamber 313 is chamfered upwards to reduce to a line, which ensures the collection of all of the close dust stuck to the ceiling or on the room to be to stare.

Cet embout s'avère donc particulièrement utile pour aspirer la poussière et les débris créés lors du percement d'un trou dans la région immédiate de l'embouchure aval. Du fait que l'étai est facilement réinstallable d'un endroit à un autre, l'utilisateur n'hésite plus à employer un aspirateur en cas de perçages répétitifs.This tip therefore proves to be particularly useful for sucking up the dust and debris created during the drilling of a hole in the immediate region of the downstream mouth. Because the forestay is easy Reinstallable from one place to another, the user no longer hesitates to use a vacuum cleaner in the event of repetitive drilling.

Un accessoire non illustré peut consister en un clip venant s'encliqueter orthogonalement par dessus le tube supérieur ou inférieur, ce clip comprenant un moignon pour recevoir le manchon 230 ou 330 de l'embout 200 ou 300. Ainsi, ces embouts peuvent être utilisés non seulement contre un plafond, mais également contre un mur.An accessory not illustrated may consist of a clip which snaps orthogonally over the upper or lower tube, this clip comprising a stump to receive the sleeve 230 or 330 of the end piece 200 or 300. Thus, these end pieces can be used not only against a ceiling, but also against a wall.

De nombreuses améliorations peuvent être apportées à cet étai selon l'invention dans le cadre des revendications.Many improvements can be made to this forestay according to the invention within the scope of the claims.

Claims (8)

1. Etai comprenant au moins un tube inférieur (12) à l'extrémité duquel coulisse un tube supérieur (10), caractérisé en ce que le tube supérieur (10) est externe, et en ce qu'il comprend un corps interne (30) solidaire qui coulisse le long d'une tige centrale (20) prolongeant le tube inférieur, un moyen élastique (40) agissant entre l'extrémité du tube inférieur et le corps interne, un dispositif (32,60,62,64) permettant de verrouiller provisoirement le corps interne (30) à la tige (20) en une position telle que le moyen élastique soit comprimé.1. Stay comprising at least one lower tube (12) at the end of which slides an upper tube (10), characterized in that the upper tube (10) is external, and in that it comprises an internal body (30 ) integral which slides along a central rod (20) extending the lower tube, an elastic means (40) acting between the end of the lower tube and the internal body, a device (32,60,62,64) allowing temporarily locking the internal body (30) to the rod (20) in a position such that the elastic means is compressed. 2. Etai selon la revendication 1, caractérisé en ce que le ou les tubes inférieurs ont une longueur comprise entre 0,5 et 1,2 mètre, et le tube supérieur coulissant a une longueur de l'ordre de 1,2 mètre, et en ce que ces tubes présentent un diamètre externe compris entre 20 et 50 millimètres pour une épaisseur comprise entre 1 et 4 millimètres.2. Forestay according to claim 1, characterized in that the lower tube or tubes have a length of between 0.5 and 1.2 meters, and the sliding upper tube has a length of the order of 1.2 meters, and in that these tubes have an external diameter between 20 and 50 millimeters for a thickness between 1 and 4 millimeters. 3. Etai selon la revendication 1, caractérisé en ce que le dispositif de verrouillage du corps interne (30) à la tige (20) peut comprendre une gâchette (60) traversant radialement et en coulissement le corps interne (30), l'extrémité interne de la gâchette étant susceptible de pénétrer dans une rainure (24) transversale de la tige (20), l'extrémité externe de la gâchette étant appuyée vers l'intérieur par un moyen de rappel (66) et étant susceptible d'être levée par le bras interne d'un levier (62) dont le bras externe peut être actionné par l'utilisateur.3. Forestay according to claim 1, characterized in that the device for locking the internal body (30) to the rod (20) may comprise a trigger (60) passing radially and slidingly through the internal body (30), the end internal of the trigger being capable of penetrating a transverse groove (24) of the rod (20), the external end of the trigger being pressed inwards by a return means (66) and being capable of being lifted by the internal arm of a lever (62), the external arm of which can be actuated by the user. 4. Etai selon la revendication 1, caractérisé en ce qu'un moyen élastique d'amortissement (42) est installé entre l'extrémité supérieure du corps interne (30) et une butée (44) vissée à l'extrémité supérieure de la tige (20).4. Forestay according to claim 1, characterized in that an elastic damping means (42) is installed between the upper end of the internal body (30) and a stop (44) screwed to the upper end of the rod (20). 5. Etai selon la revendication 1, caractérisé en ce que le corps interne (30) est solidarisé au tube supérieur (10) au moyen d'une vis de serrage (50) dont la tige traverse le tube par une ouverture longitudinale (14) et est engagée dans un taraudage radial du corps (30), et dont la tête externe appuie contre la paroi externe du tube.5. Forestay according to claim 1, characterized in that the internal body (30) is secured to the upper tube (10) by means of a clamping screw (50) whose rod passes through the tube through a longitudinal opening (14) and is engaged in a radial tapping of the body (30), and the external head of which presses against the external wall of the tube. 6. Etai selon la revendication 1, caractérisé en ce qu'un embout pour soutenir une pièce plane comprend un manchon vertical (230) engagé dans l'extrémité du tube supérieur (10), lequel manchon est relié par une charnière horizontale (232,240) à une plaque supérieure de soutènement (210), la charnière pouvant être bloquée en serrage par une vis (220,222) constituant son axe de rotation.6. Forestay according to claim 1, characterized in that a nozzle for supporting a flat part comprises a vertical sleeve (230) engaged in the end of the upper tube (10), which sleeve is connected by a horizontal hinge (232,240) to an upper support plate (210), the hinge being able to be locked in tightening by a screw (220,222) constituting its axis of rotation. 7. Etai selon la revendication 6, caractérisé en ce que la plaque de soutènement (210) est complétée d'une plaque latérale secondaire (260) dont l'extrémité protubérante du longeron inférieur (262) faisant office de charnon est reliée par une vis de serrage (221,223) à l'extrémité en correspondance d'un longeron inférieur (216) de la plaque de soutènement (210), cette extrémité faisant également office de charnon, et dont l'un des charnons présente un orifice oblong pour un réglage en écartement des deux plaques.7. Forestay according to claim 6, characterized in that the support plate (210) is completed with a secondary side plate (260) whose protruding end of the lower spar (262) acting as knuckle is connected by a screw clamping (221,223) at the corresponding end of a lower beam (216) of the retaining plate (210), this end also serving as knuckle, and one of the knuckles has an oblong orifice for adjustment in separation of the two plates. 8. Etai selon la revendication 6, caractérisé en ce que la plaque de soutènement (310) comprend, dans son épaisseur, un canal interne traversant dont l'une des sorties peut être reliée à un tube d'aspiration.8. Forestay according to claim 6, characterized in that the support plate (310) comprises, in its thickness, an internal through channel, one of the outputs of which can be connected to a suction tube.
EP94420369A 1994-02-23 1994-12-21 Telescopic strut Withdrawn EP0669434A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9402300 1994-02-23
FR9402300A FR2716481A1 (en) 1994-02-23 1994-02-23 Telescopic stay.

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109113328A (en) * 2018-09-30 2019-01-01 重庆瑞鑫科五金制品有限公司 A kind of aluminum alloy pattern plate stretching structure
CN117988550A (en) * 2024-04-03 2024-05-07 山西八建集团有限公司 Frame construction beam column node template strutting arrangement

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1820950A (en) * 1928-04-10 1931-09-01 Hugo G Schulstadt Adjustable prop
CH378516A (en) * 1960-07-30 1964-06-15 Joder Hermann Tension strut
DE3838364A1 (en) * 1988-11-11 1990-05-17 Gruenzweig & Hartmann Montage Device for securing ceiling panels which are to be mounted overhead

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1820950A (en) * 1928-04-10 1931-09-01 Hugo G Schulstadt Adjustable prop
CH378516A (en) * 1960-07-30 1964-06-15 Joder Hermann Tension strut
DE3838364A1 (en) * 1988-11-11 1990-05-17 Gruenzweig & Hartmann Montage Device for securing ceiling panels which are to be mounted overhead

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109113328A (en) * 2018-09-30 2019-01-01 重庆瑞鑫科五金制品有限公司 A kind of aluminum alloy pattern plate stretching structure
CN109113328B (en) * 2018-09-30 2020-11-13 重庆瑞鑫科五金制品有限公司 Telescopic structure for aluminum template
CN117988550A (en) * 2024-04-03 2024-05-07 山西八建集团有限公司 Frame construction beam column node template strutting arrangement

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