EP0931757A1 - Hoist - Google Patents

Hoist Download PDF

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Publication number
EP0931757A1
EP0931757A1 EP99400121A EP99400121A EP0931757A1 EP 0931757 A1 EP0931757 A1 EP 0931757A1 EP 99400121 A EP99400121 A EP 99400121A EP 99400121 A EP99400121 A EP 99400121A EP 0931757 A1 EP0931757 A1 EP 0931757A1
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EP
European Patent Office
Prior art keywords
strip
lifting device
hoist
lifting
strands
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.)
Granted
Application number
EP99400121A
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German (de)
French (fr)
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EP0931757B1 (en
Inventor
André Garnier
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Societe dInnovations Techniques SIT SAS
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Societe dInnovations Techniques SIT SAS
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Publication of EP0931757A1 publication Critical patent/EP0931757A1/en
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Publication of EP0931757B1 publication Critical patent/EP0931757B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/18—Power-operated hoists
    • B66D3/20—Power-operated hoists with driving motor, e.g. electric motor, and drum or barrel contained in a common housing
    • B66D3/22—Power-operated hoists with driving motor, e.g. electric motor, and drum or barrel contained in a common housing with variable-speed gearings between driving motor and drum or barrel

Definitions

  • the invention relates to hoists of the hoist type, which are used for handling various loads and are suitable for mounting on structures load-bearing structures, such as bridges, spiers, pylons, rails, brackets, gantries, masts other suspension devices.
  • the invention is particularly applicable to mechanical hoists comprising a hanging device mounted on a flexible means of traction, generally a cable that can be rolled up on the headstock of a motorized winch.
  • a hanging device mounted on a flexible means of traction, generally a cable that can be rolled up on the headstock of a motorized winch.
  • the document DE 682 482 describes an encapsulated hoist block with a drive by electric motor.
  • the flexible means of traction consists of bands of thin metal spirally wound on at least one pair of rollers spaced from each other, so that the two strips are simultaneously rolled up or unrolled of the same value during the lifting operations of a charge.
  • the use of a band as a rolling traction means prevents any notable twisting of the strip, while allowing the load to be increased according to a vertical axis.
  • the object of the invention is to remedy these drawbacks by proposing an apparatus for lifting in which the phenomena of twisting and swaying have been minimized, or even deleted, and in which the replacement of the different elements can be carried out simply, quickly and economically, possibly using a remote manipulator.
  • the subject of the invention is a hoist-type lifting device, comprising a band flat forming two hoist strands, the two hoist strands being able to unwind and to be wound by juxtaposing on a single reel, by unwinding or by winding simultaneously of the same value when lifting a load, characterized in that the strip passes over a spacer roller which forms in the band a substantially horizontal upper strand, so as to improve stability of the load by the spacing thus given to the two ascending strands of the hoist.
  • the lifting device is intended to be adapted to any type of support, for example a bridge, one or more rails suspended, a gallows, one or more masts, or equivalent supports.
  • the device lifting according to the invention is carried out in a modular way to make it easily interchangeable the various constituent elements and facilitate all operations of assembly and maintance.
  • the lifting device comprises two flanges 1 interconnected to form a frame 2 braced with plates transverse to the flanges 1 and parallel to the flanges 1.
  • the frame 2 comprises an intermediate plate 3 with a notch 3a and a flaring 3b located opposite the notch 3a.
  • the frame 2 is suitable for mounting a drum 4 for winding a strip 5 supporting an attachment member 6 for attaching a load hooking device not shown, such as hook, jaw, electromagnet, or the like.
  • Frame 2 is also suitable on the side of the notch 3a for mounting a motor 7 drive whose output shaft carries an externally toothed crown 8 and intended to be mounted inside a space 9 and be secured to the frame due to fixing the fixed flange 10 to the frame 2.
  • Frame 2 can be a frame stationary suspended in a fixed place or can constitute a trolley movable on a beam or support not shown.
  • the frame or carriage 2 includes preferably rollers 12 and 13 for rolling on a beam flange or a support not shown.
  • the carriage 2 is moved by a motor 14 mounted on a flange 1 on the side opposite to the rollers 12 and 13 for rolling.
  • the motor 14 drives a drive roller 15 intended to mesh with a rack mounted on the beam base or the lifting device support, so as to move the lifting device along the rack and the support not shown.
  • the flaring 3b made on a flange 1 and on an intermediate plate 3 is extends at 16 to form a cradle 16 for receiving the opposite axes of the drum 4.
  • the locking members 17 forming a lever ensure the locking in position of the drum 4.
  • the blocking members 17 make it possible to dismantle the drum 4 for the disconnect from frame 2 and carry out maintenance or tape replacement 5.
  • the attachment member 6 is constituted by a frame of substantially equal width or slightly higher than that of the strip 5.
  • the fastening member 6 has three rollers 18.
  • the strip 5 passes around the three rollers 18. This variant, not shown, has the drawback a fall of the fastening member 6 in the event of the band 5 breaking at the level of the passage on the rollers 18.
  • the attachment member 6 is provided with a support 19 allowing the mounting of a hooking device for a predetermined load.
  • the strip 5 can be made of any suitable metallic, synthetic material, in sheets, trellis or knitted.
  • Band 5 must meet the two constraints following essentials: be rollable and have a high resistance to elongation so as to simultaneously shorten or lengthen the two strands tape when winding or unwinding.
  • a strip 5 made of a braided polyamide strap is used of a type known for static load securing.
  • Such a costly material economical is suitable for the use and the new functions assigned to it in the present invention, due to its ability to withstand very high pulls practically without elongation.
  • the use of a flat traction means ensures horizontal load self-stability, because the conformation of the strip does not generate itself no tendency to rotate and cancels any initiation of twisting which may be transmitted to it by a parasitic force applied to the load.
  • this flat strip with a winding system causing an elongation or a identical and simultaneous shortening of the two strands of the strip provides also a vertical self-stability of the load when it is not subjected to no lateral swinging force.
  • the reel 4 meshes directly via its toothed crown 11 partially shown with the toothed crown 8 driven by the motor 7.
  • the invention also extends to the case of a drive of the drum 4 by via a gear train comprising one or more gears intermediaries.
  • the reel 4 could also be motorized, which would allow switch from electric motor 7 and would provide simple and economical mounting.
  • the fastening member 6 will remain stationary by relative to the two strands of the strip and can be fixedly mounted on the strip by any suitable attachment means (plate, screw, seam, or the like).
  • the fastening member 6 could also be constituted directly by an element of junction connecting the two ends of the two strands of the strip 5. In this case, when the fastening member is fixedly mounted on the strip by any fastening means safety is ensured in the event of a break in one of the strands of the strip 5, because the load will remain suspended on the lifting device by the remaining unaffected strand by the break.
  • This embodiment of lifting device is of simple construction and economical, due to the use of a single reel 4 and the elimination of all adjustment when mounting the lifting unit.
  • the strip 5 shaped as a closed loop has two strands which are wound in juxtaposing on this unique reel.
  • Frame 2 of the lifting unit carries a roller 20 spacing intended to transmit an equal tensile force on the two strands uprights 21, 22 of the strip 5.
  • the spacer roller 20, in combination with the single drum 24 contributes to load stability by the spacing it gives to two strands 21 and 22.
  • the two strands 21 and 22 are connected by a strand upper 23 substantially horizontal of the strip 5.
  • the fastening member 6 is fixed so as to prevent the load from falling in the event of rupture of one of the strands of the strip, while retaining the advantage of realignment automatic attachment member 6, because this attachment member 6 can be move in a limited way along the strip 5.
  • the lifting device includes control and supply means which are not shown, preferably control and supply means of a nature electric or electronic. These means similar to those used in conventional lifting devices with cables or chains do not require a more detailed description.
  • FIG. 2 another embodiment of the invention includes elements identical or functionally equivalent to those described with reference to the Figure 1 and marked with reference numbers identical to the figures in Figure 1.
  • This embodiment has an additional spacer roller 26 located substantially at the same height as the spacer roller 20, so that increase the stability of the strip 5 and ensure a symmetrical geometry between the two rollers 20 and 26 and the attachment member 6.
  • the two upright strands 21 and 22 are thus symmetrical and form the two sides an isosceles trapezoid defined by the axes of the rollers 20 and 26 and the axes of the two side rollers 18.

Abstract

The hoist uses a flat belt (5) driven by an electric motor (7) to lift and lower loads. The belt is taken up and let out by a single drum (4) and passes round a spacer roller (20) to form a horizontal upper section (23) between its two angled sides (21, 22). The loading unit (6) can move along the belt or can be fastened to the inside an additional loop (24).

Description

L'invention concerne les appareils de levage du genre palan, lesquels sont utilisés pour la manutention de diverses charges et sont aptes à être montés sur des structures porteuses, telles que des ponts, flèches, pylônes, rails, potences, portiques, mâts et autres dispositifs de suspension.The invention relates to hoists of the hoist type, which are used for handling various loads and are suitable for mounting on structures load-bearing structures, such as bridges, spiers, pylons, rails, brackets, gantries, masts other suspension devices.

L'invention est particulièrement applicable aux palans mécaniques comportant un dispositif d'accrochage mouflé sur un moyen souple de traction, généralement un câble enroulable sur la poupée d'un treuil motorisé. En enroulant le câble, on raccourcit identiquement la longueur des brins, de manière que le système de suspension du dispositif d'accrochage roulant sur la câble reste pratiquement immobile par rapport à la verticale et s'élève le long de cette verticale. Ce type d'appareil de levage bien connu n'est pas décrit plus en détail.The invention is particularly applicable to mechanical hoists comprising a hanging device mounted on a flexible means of traction, generally a cable that can be rolled up on the headstock of a motorized winch. By winding the cable, we identically shortens the length of the strands, so that the system of suspension of the hanging hook on the cable remains practically motionless with respect to the vertical and rises along this vertical. This guy well-known lifting device is not described in more detail.

Plusieurs inconvénients ont été constatés à l'usage lorsqu'on doit manutentionner avec beaucoup de précision et de sécurité des charges délicates ou dangereuses, notamment lorsqu'une présence humaine à proximité de la charge est proscrite, pour aider au guidage de la charge en cours de manutention.Several drawbacks have been noted in use when it is necessary to handle with great precision and security for delicate or dangerous loads, especially when human presence near the load is prohibited, to help guide the load during handling.

On constate principalement une tendance au vrillage des brins du câble de traction, vrillage qui provoque une mise en rotation de la charge elle-même, cette mise en rotation n'étant pas maítrisée par le montage tournant du moyen d'accrochage sur son support. En outre, du fait que le moyen d'accrochage est libre de se déplacer le long du câble, on constate une tendance de la charge à osciller et prendre du ballant le long du câble pendant les opérations de levage.There is mainly a tendency to twist the strands of the traction cable, twisting which causes the load itself to rotate, this setting rotation not being controlled by the rotary mounting of the attachment means on its support. In addition, because the hooking means is free to move along of the cable, there is a tendency for the load to oscillate and take off along the cable during lifting operations.

Le document DE 682 482 décrit un bloc palan encapsulé avec un entraínement par moteur électrique. Le moyen souple de traction est constitué par des bandes métalliques de faible épaisseur enroulées en spirale sur au moins une paire de rouleaux espacés l'un de l'autre, de manière que les deux bandes sont simultanément enroulées ou déroulées d'une valeur identique lors des opérations de levage d'une charge. L'utilisation d'une bande comme moyen de traction enroulable empêche tout vrillage notable de la bande, tout en permettant une élévation de la charge selon un axe vertical. The document DE 682 482 describes an encapsulated hoist block with a drive by electric motor. The flexible means of traction consists of bands of thin metal spirally wound on at least one pair of rollers spaced from each other, so that the two strips are simultaneously rolled up or unrolled of the same value during the lifting operations of a charge. The use of a band as a rolling traction means prevents any notable twisting of the strip, while allowing the load to be increased according to a vertical axis.

Cependant, dans ce dispositif connu, la rotation simultanée en sens inverse des rouleaux d'au moins une paire de rouleaux nécessite l'utilisation d'un moteur électrique de forte puissance accouplé à un train d'engrenages aptes à entraíner simultanément en rotation les rouleaux précités.However, in this known device, the simultaneous rotation in opposite directions of the rollers of at least one pair of rollers requires the use of a motor high power electric coupled to a gear train capable of driving simultaneously rotating the above rollers.

Le document EP 0 082 046 décrit un palan perfectionné avec un lien couple plat constitué par une sangle textile ou une tresse métallique plate. Ce palan donne généralement satisfaction, mais présente l'inconvénient d'une construction complexe, de fabrication coûteuse et de maintenance difficile. Ce palan est par conséquent difficilement utilisable dans un environnement n'autorisant pas une présence humaine.Document EP 0 082 046 describes an improved hoist with a flat torque link consisting of a textile strap or a flat metallic braid. This hoist gives generally satisfactory, but has the disadvantage of a complex construction, costly to manufacture and difficult to maintain. This hoist is therefore difficult to use in an environment which does not allow a presence human.

L'invention a pour but de remédier à ces inconvénients, en proposant un appareil de levage dans lequel les phénomènes de vrillage et de ballant ont été minimisés, voire supprimés, et dans lequel le remplacement des différents éléments peut être effectué de manière simple, rapide et économique, éventuellement à l'aide d'un télémanipulateur.The object of the invention is to remedy these drawbacks by proposing an apparatus for lifting in which the phenomena of twisting and swaying have been minimized, or even deleted, and in which the replacement of the different elements can be carried out simply, quickly and economically, possibly using a remote manipulator.

L'invention a pour objet un appareil de levage du genre palan, comportant une bande plate formant deux brins de palan, les deux brins de palan étant aptes à se dérouler et à s'enrouler en se juxtaposant sur un touret unique, en se déroulant ou en s'enroulant simultanément d'une valeur identique lors des opérations de levage d'une charge, caractérisé en ce que la bande passe sur un rouleau d'écartement qui forme dans la bande un brin supérieur sensiblement horizontal, de manière à améliorer la stabilité de la charge par l'écartement ainsi conféré aux deux brins montants de palan.The subject of the invention is a hoist-type lifting device, comprising a band flat forming two hoist strands, the two hoist strands being able to unwind and to be wound by juxtaposing on a single reel, by unwinding or by winding simultaneously of the same value when lifting a load, characterized in that the strip passes over a spacer roller which forms in the band a substantially horizontal upper strand, so as to improve stability of the load by the spacing thus given to the two ascending strands of the hoist.

Selon d'autres caractéristiques de l'invention :

  • la bande plate est constituée par une sangle en polyamide tresse,
  • l'organe d'accrochage est monté libre sur la bande,
  • l'organe d'accrochage est monté fixe sur la bande, ou alternativement l'organe d'accrochage est fixé aux extrémités basses de chaque brin de la bande,
  • un train d'engrenages peut être disposé entre la couronne du moteur et la couronne d'entraínement du touret unique.
  • la bande peut comporter une bande auxiliaire formant une boucle de sécurité enfermant un organe d'attache monté sur la bande,
  • la bande peut passer sur un rouleau d'écartement supplémentaire, de manière à augmenter la stabilité du levage ; dans ce cas ledit rouleau d'écartement supplémentaire et le premier rouleau d'écartement sont montés sensiblement à la même hauteur et sensiblement symétriquement par rapport au plan vertical d'élévation de la charge ; et ledit rouleau d'écartement supplémentaire forme avantageusement dans la bande un brin sensiblement vertical s'enroulant sur un touret unique.
According to other characteristics of the invention:
  • the flat band consists of a braided polyamide strap,
  • the attachment member is mounted freely on the strip,
  • the fastening member is mounted fixed on the strip, or alternatively the fastening member is fixed to the lower ends of each strand of the strip,
  • a gear train can be disposed between the crown of the motor and the drive ring of the single drum.
  • the strip may include an auxiliary strip forming a safety loop enclosing a fastening member mounted on the strip,
  • the strip can pass over an additional spacer roller, so as to increase the stability of the lifting; in this case said additional spacer roller and the first spacer roller are mounted at substantially the same height and substantially symmetrically with respect to the vertical plane of elevation of the load; and said additional spacer roller advantageously forms in the strip a substantially vertical strand winding on a single reel.

L'invention sera mieux comprise grâce à la description qui va suivre donnée à titre d'exemple non limitatif en référence aux dessins annexés dans lesquels :

  • la figure 1 représente schématiquement une vue en perspective éclatée d'un premier mode de réalisation d'un appareil de levage selon l'invention,
  • la figure 2 représente schématiquement une vue en perspective partielle d'un deuxième mode de réalisation d'appareil de levage selon l'invention,
The invention will be better understood thanks to the description which follows given by way of nonlimiting example with reference to the appended drawings in which:
  • FIG. 1 schematically represents an exploded perspective view of a first embodiment of a lifting device according to the invention,
  • FIG. 2 schematically represents a partial perspective view of a second embodiment of a lifting device according to the invention,

Selon les deux modes de réalisation de l'invention, l'appareil de levage est destiné à être adapté sur tout type de support, par exemple un pont, un ou plusieurs rails suspendus, une potence, un ou plusieurs mâts, ou supports équivalents. L'appareil de levage selon l'invention est réalisé de manière modulaire pour rendre facilement interchangeables les divers éléments constitutifs et faciliter toutes opérations de montage et de maintance.According to the two embodiments of the invention, the lifting device is intended to be adapted to any type of support, for example a bridge, one or more rails suspended, a gallows, one or more masts, or equivalent supports. The device lifting according to the invention is carried out in a modular way to make it easily interchangeable the various constituent elements and facilitate all operations of assembly and maintance.

En référence à la figure 1, l'appareil de levage selon l'invention comporte deux flasques 1 reliés entre eux pour former un bâti 2 entretoisé à l'aide de plaques transversales aux flasques 1 et parallèles aux flasques 1.Referring to Figure 1, the lifting device according to the invention comprises two flanges 1 interconnected to form a frame 2 braced with plates transverse to the flanges 1 and parallel to the flanges 1.

Le bâti 2 comporte une plaque 3 intermédiaire avec une échancrure 3a et un évasement 3b situé à l'opposé de l'échancrure 3a.The frame 2 comprises an intermediate plate 3 with a notch 3a and a flaring 3b located opposite the notch 3a.

Le bâti 2 est adapté au montage d'un touret 4 pour l'enroulement d'une bande 5 supportant un organe d'attache 6 pour attacher un dispositif d'accrochage de charge non représenté, du genre crochet, mâchoire, électro-aimant, ou analogue. Le bâti 2 est également adapté du côté de l'échancrure 3a au montage d'un moteur 7 d'entraínement dont l'arbre de sortie porte une couronne 8 dentée extérieurement et destinée à être montée à l'intérieur d'un espace 9 et être solidarisée au bâti du fait de la fixation de la bride fixe 10 au bâti 2.The frame 2 is suitable for mounting a drum 4 for winding a strip 5 supporting an attachment member 6 for attaching a load hooking device not shown, such as hook, jaw, electromagnet, or the like. Frame 2 is also suitable on the side of the notch 3a for mounting a motor 7 drive whose output shaft carries an externally toothed crown 8 and intended to be mounted inside a space 9 and be secured to the frame due to fixing the fixed flange 10 to the frame 2.

Dans la position montée, la couronne dentée 8 engrène avec une couronne dentée 11 du touret d'enroulement 4, représentée partiellement. Le bâti 2 peut être un bâti immobile suspendu à un endroit fixe ou peut constituer un chariot déplaçable sur une poutre ou un support non représenté. Dans ce cas, le bâti ou chariot 2 comporte de préférence des galets 12 et 13 de roulement sur une semelle de poutre ou un support non représenté. Le déplacement du chariot 2 est assuré par un moteur 14 monté sur un flasque 1 du côté opposé aux galets 12 et 13 de roulement. Le moteur 14 entraíne un galet 15 d'entraínement destiné à engrener avec une crémaillère montée sur la semelle de poutre ou le support de l'appareil de levage, de manière à déplacer l'appareil de levage le long de la crémaillère et du support non représenté.In the mounted position, the ring gear 8 meshes with a ring gear 11 of the winding reel 4, partially shown. Frame 2 can be a frame stationary suspended in a fixed place or can constitute a trolley movable on a beam or support not shown. In this case, the frame or carriage 2 includes preferably rollers 12 and 13 for rolling on a beam flange or a support not shown. The carriage 2 is moved by a motor 14 mounted on a flange 1 on the side opposite to the rollers 12 and 13 for rolling. The motor 14 drives a drive roller 15 intended to mesh with a rack mounted on the beam base or the lifting device support, so as to move the lifting device along the rack and the support not shown.

L'évasement 3b pratiqué sur un flasque 1 et sur une plaque intermédiaire 3 se prolonge en 16 pour former un berceau 16 de réception des axes opposés du touret 4. Après montage des axes du touret 4 dans les évidements 16 formant berceau, les organes 17 de verrouillage formant levier assurent le blocage en position du touret 4. Inversement, les organes 17 de blocage permettent de démonter le touret 4 pour le désolidariser du bâti 2 et effectuer des opérations de maintenance ou de remplacement de la bande 5.The flaring 3b made on a flange 1 and on an intermediate plate 3 is extends at 16 to form a cradle 16 for receiving the opposite axes of the drum 4. After mounting the axes of the drum 4 in the recesses 16 forming a cradle, the locking members 17 forming a lever ensure the locking in position of the drum 4. Conversely, the blocking members 17 make it possible to dismantle the drum 4 for the disconnect from frame 2 and carry out maintenance or tape replacement 5.

L'organe d'attache 6 est constitué par une monture d'une largeur sensiblement égale ou légèrement supérieure à celle de la bande 5. L'organe d'attache 6 comporte trois rouleaux 18. Dans une variante de réalisation non représentée, la bande 5 passe autour des trois rouleaux 18. Cette variante non représentée présente l'inconvénient d'une chute de l'organe d'attache 6 en cas de rupture de la bande 5 au niveau du passage sur les rouleaux 18.The attachment member 6 is constituted by a frame of substantially equal width or slightly higher than that of the strip 5. The fastening member 6 has three rollers 18. In an alternative embodiment not shown, the strip 5 passes around the three rollers 18. This variant, not shown, has the drawback a fall of the fastening member 6 in the event of the band 5 breaking at the level of the passage on the rollers 18.

En partie basse, l'organe d'attache 6 est pourvu d'un support 19 permettant le montage d'un dispositif d'accrochage d'une charge prédéterminée.In the lower part, the attachment member 6 is provided with a support 19 allowing the mounting of a hooking device for a predetermined load.

La bande 5 peut être constituée en tout matériau approprié métallique, synthétique, en feuilles, en treillis ou tricot. La bande 5 doit répondre aux deux contraintes essentielles suivantes: être enroulable et avoir une grande résistance à l'allongement de manière à assurer le raccourcissement ou l'allongement simultané des deux brins de la bande lors de l'enroulement ou du déroulement. The strip 5 can be made of any suitable metallic, synthetic material, in sheets, trellis or knitted. Band 5 must meet the two constraints following essentials: be rollable and have a high resistance to elongation so as to simultaneously shorten or lengthen the two strands tape when winding or unwinding.

On utilise avantageusement une bande 5 réalisée dans une sangle en polyamide tressé de type connu pour l'arrimage statique des charges. Un tel matériau d'un coût économique est adapté à l'utilisation et aux fonctions nouvelles qui lui sont assignées dans la présente invention, du fait de sa capacité à résister à des tractions très élevées pratiquement sans allongement. L'emploi d'un moyen de traction plat assure une autostabilité horizontale de la charge, car la conformation de la bande ne génère par elle-même aucune tendance à la rotation et annule toute amorce de vrillage pouvant lui être transmise par une force parasite appliquée à la charge. La combinaison de cette bande plate avec un système d'enroulement provoquant un allongement ou un raccourcissement identique et simultané des deux brins de la bande procure également une autostabilité verticale de la charge lorsque celle-ci n'est soumise à aucune force latérale de ballant.Advantageously, a strip 5 made of a braided polyamide strap is used of a type known for static load securing. Such a costly material economical is suitable for the use and the new functions assigned to it in the present invention, due to its ability to withstand very high pulls practically without elongation. The use of a flat traction means ensures horizontal load self-stability, because the conformation of the strip does not generate itself no tendency to rotate and cancels any initiation of twisting which may be transmitted to it by a parasitic force applied to the load. The combination of this flat strip with a winding system causing an elongation or a identical and simultaneous shortening of the two strands of the strip provides also a vertical self-stability of the load when it is not subjected to no lateral swinging force.

Dans l'exemple représenté, le touret 4 engrène directement par l'intermédiaire de sa couronne dentée 11 représentée partiellement avec la couronne dentée 8 entraínée par le moteur 7. L'invention s'étend également au cas d'un entraínement du touret 4 par l'intermédiaire d'un train d'engrenages comportant un ou plusieurs engrenages intermédiaires. Le touret 4 pourrait également être motorisé, ce qui permettrait de se passer du moteur électrique 7 et fournirait un montage simple et économique.In the example shown, the reel 4 meshes directly via its toothed crown 11 partially shown with the toothed crown 8 driven by the motor 7. The invention also extends to the case of a drive of the drum 4 by via a gear train comprising one or more gears intermediaries. The reel 4 could also be motorized, which would allow switch from electric motor 7 and would provide simple and economical mounting.

Dans la variante non représentée dans laquelle la bande 5 passe directement sur les rouleaux 18, le recentrage automatique de l'organe d'attache 6 est assuré automatiquement par déplacement le long de la bande 5, par exemple lorsque le point de prise de la charge ne se trouve pas exactement à la verticale de l'unité de levage.In the variant not shown in which the strip 5 passes directly over the rollers 18, automatic refocusing of the fastening member 6 is ensured automatically by moving along strip 5, for example when the point load pickup is not exactly vertical to the lifting unit.

Cependant, dans le cas d'un chariot 2 déplaçable pour assurer le recentrage automatique à la verticale de la charge, l'organe d'attache 6 restera immobile par rapport aux deux brins de la bande et pourra être monté de manière fixe sur la bande par tout moyen d'attache approrié (plaque, vis, couture, ou analogue).However, in the case of a carriage 2 that can be moved to ensure recentering automatic vertical to the load, the fastening member 6 will remain stationary by relative to the two strands of the strip and can be fixedly mounted on the strip by any suitable attachment means (plate, screw, seam, or the like).

L'organe d'attache 6 pourrait également être constitué directement par un élément de jonction reliant les deux extrémités des deux brins de la bande 5. Dans ce cas, lorsque l'organe d'attache est monté fixe sur la bande par tout moyen d'attache approprié, la sécurité est assurée en cas de rupture de l'un des brins de la bande 5, car la charge restera suspendue à l'appareil de levage par le brin subsistant non affecté par la rupture. The fastening member 6 could also be constituted directly by an element of junction connecting the two ends of the two strands of the strip 5. In this case, when the fastening member is fixedly mounted on the strip by any fastening means safety is ensured in the event of a break in one of the strands of the strip 5, because the load will remain suspended on the lifting device by the remaining unaffected strand by the break.

Ce mode de réalisation d'appareil de levage est d'une construction simple et économique, du fait de l'utilisation d'un seul touret 4 et de la suppression de tout réglage au montage de l'unité de levage.This embodiment of lifting device is of simple construction and economical, due to the use of a single reel 4 and the elimination of all adjustment when mounting the lifting unit.

La bande 5 conformée en boucle fermée présente deux brins qui s'enroulent en se juxtaposant sur ce touret unique. Le bâti 2 de l'unité de levage porte un rouleau 20 d'écartement destiné à transmettre une force de traction égale sur les deux brins montants 21, 22 de la bande 5. Le rouleau d'écartement 20, en combinaison avec le touret unique 24 concourt à la stabilité de la charge par l'écartement qu'il confère aux deux brins montants 21 et 22. Les deux brins 21 et 22 sont reliés par un brin supérieur 23 sensiblement horizontal de la bande 5.The strip 5 shaped as a closed loop has two strands which are wound in juxtaposing on this unique reel. Frame 2 of the lifting unit carries a roller 20 spacing intended to transmit an equal tensile force on the two strands uprights 21, 22 of the strip 5. The spacer roller 20, in combination with the single drum 24 contributes to load stability by the spacing it gives to two strands 21 and 22. The two strands 21 and 22 are connected by a strand upper 23 substantially horizontal of the strip 5.

L'organe d'attache 6 est fixé de manière à éviter que la charge ne tombe en cas de rupture d'un des brins de la bande, tout en conservant l'avantage d'un réalignement automatique de l'organe d'attache 6, du fait que cet organe d'attache 6 peut se déplacer de manière limitée le long de la bande 5.The fastening member 6 is fixed so as to prevent the load from falling in the event of rupture of one of the strands of the strip, while retaining the advantage of realignment automatic attachment member 6, because this attachment member 6 can be move in a limited way along the strip 5.

Ce déplacement limité résulte de la fixation d'une bande auxiliaire 24 au voisinage du point bas de la bande 5 ; cette bande auxiliaire 24 passe sous une entretoise 25 de l'organe d'attache 6. Cette bande auxiliaire 24 cousue à ses deux extrémités à la bande 5 constitue ainsi avec la bande 5 une boucle de sécurité enfermant l'organe d'attache 6 et le maintenant suspendu à un brin subsistant en cas de rupture d'un autre brin.This limited displacement results from the attachment of an auxiliary strip 24 in the vicinity from the low point of strip 5; this auxiliary strip 24 passes under a spacer 25 of the attachment member 6. This auxiliary strip 24 sewn at its two ends to the band 5 thus constitutes with band 5 a safety loop enclosing the member attachment 6 and now hanging on a strand remaining in the event of breakage of another strand.

L'appareil de levage comporte des moyens de commande et d'alimentation non représentés, de préférence des moyens de commande et d'alimentation de nature électrique ou électronique. Ces moyens analogues à ceux qui sont utilisés dans des appareils de levage classiques à câbles ou à chaínes ne nécessitent pas une description plus détaillée.The lifting device includes control and supply means which are not shown, preferably control and supply means of a nature electric or electronic. These means similar to those used in conventional lifting devices with cables or chains do not require a more detailed description.

En référence à la figure 2, un autre mode de réalisation de l'invention comporte des éléments identiques ou fonctionnellement équivalents à ceux décrits en référence à la figure 1 et repérés par des chiffres de référence identique aux chiffres de la figure 1.With reference to FIG. 2, another embodiment of the invention includes elements identical or functionally equivalent to those described with reference to the Figure 1 and marked with reference numbers identical to the figures in Figure 1.

Ce mode de réalisation présente un rouleau d'écartement supplémentaire 26 situé sensiblement à la même hauteur que le rouleau d'écartement 20, de manière à augmenter la stabilité de la bande 5 et à assurer une géométrie symétrique entre les deux rouleaux 20 et 26 et l'organe 6 d'attache.This embodiment has an additional spacer roller 26 located substantially at the same height as the spacer roller 20, so that increase the stability of the strip 5 and ensure a symmetrical geometry between the two rollers 20 and 26 and the attachment member 6.

Les deux brins montants 21 et 22 sont ainsi symétriques et forment les deux côtés d'un trapèze isocèle défini par les axes des rouleaux 20 et 26 et les axes des deux rouleaux latéraux 18.The two upright strands 21 and 22 are thus symmetrical and form the two sides an isosceles trapezoid defined by the axes of the rollers 20 and 26 and the axes of the two side rollers 18.

Du fait de la présence du rouleau supplémentaire 26, un brin supplémentaire 27 sensiblement vertical est formé dans la bande 5 entre le rouleau 26 et le touret 4.Due to the presence of the additional roller 26, an additional strand 27 substantially vertical is formed in the strip 5 between the roller 26 and the drum 4.

Le montage de ce sous-ensemble s'effectue de manière analogue sur un bâti similaire au bâti décrit en référence à la figure 1, étant précisé qu'un berceau complémentaire de réception doit être prévu pour les axes du rouleau 26 à l'aide d'échancrures symétriques aux échancrures 20a de la figure 1 servant à monter le rouleau 20 de la figure 1. Cette adaptation d'échancrures supplémentaires sur un bâti 2, en position symétrique et sensiblement dans le même plan que les échancrures 20a de la figure 1 ne présente pas de difficulté particulière pour un homme du métier, et ne nécessite pas de description plus détaillée.The assembly of this sub-assembly is carried out in a similar manner on a similar frame to the frame described with reference to Figure 1, it being specified that an additional cradle reception must be provided for the axes of the roller 26 using notches symmetrical to the notches 20a of FIG. 1 used to mount the roller 20 of the Figure 1. This adaptation of additional notches on a frame 2, in position symmetrical and substantially in the same plane as the notches 20a of FIG. 1 does not present any particular difficulty for a person skilled in the art, and does not require no more detailed description.

Claims (10)

Appareil de levage du genre palan, comportant une bande plate (5) formant deux brins (21, 22) de palan, les deux brins (21, 22) de palan étant aptes à se dérouler en se juxtaposant sur un touret unique (4), en se déroulant et en s'enroulant simultanément d'une valeur identique lors des opérations de levage d'une charge, caractérisé en ce que la bande (5) passe sur un rouleau (20) d'écartement qui forme dans la bande (5) un brin supérieur (23) sensiblement horizontal, de manière à améliorer la stabilité de la charge par l'écartement ainsi conféré aux deux brins (21, 22) montants de palan.Hoist-type lifting device, comprising a flat band (5) forming two hoist strands (21, 22), the two hoist strands (21, 22) being able to unwind in juxtaposing on a single reel (4), unrolling and winding simultaneously of the same value when lifting a load, characterized in that that the strip (5) passes over a spacer roller (20) which forms in the strip (5) a substantially horizontal upper strand (23), so as to improve the stability of the load by the spacing thus given to the two strands (21, 22) hoist uprights. Appareil de levage selon la revendication 1, caractérisé en ce que la bande (5) est constituée par une sangle en polyamide tressé.Lifting device according to claim 1, characterized in that the strip (5) is constituted by a braided polyamide strap. Appareil de levage selon la revendication 1 ou la revendication 2, caractérisé en ce que l'organe d'accrochage (6) est monté libre sur la bande (5).Lifting device according to claim 1 or claim 2, characterized in that the fastening member (6) is mounted freely on the strip (5). Appareil de levage selon la revendication 1 ou la revendication 2, caractérisé en ce que l'organe d'accrochage (6) est monté fixe sur la bande (5).Lifting device according to claim 1 or claim 2, characterized in that the hooking member (6) is fixedly mounted on the strip (5). Appareil de levage selon la revendication 4, caractérisé en ce que l'organe d'accrochage (6) est fixé aux extrémités basses de chaque brin de la bande (5).Lifting device according to claim 4, characterized in that the member hooking (6) is fixed to the lower ends of each strand of the strip (5). Appareil de levage selon la revendication 1, caractérisé en ce qu'un train d'engrenages est disposé entre la couronne (8) du moteur (7) et la couronne (11) du touret unique (4).Lifting device according to claim 1, characterized in that a train of gears is arranged between the crown (8) of the motor (7) and the crown (11) of the single drum (4). Appareil de levage selon l'une quelconque des revendications précédentes, caractérisé en ce que la bande (5) comporte une bande auxiliaire (24) formant une boucle de sécurité enfermant un organe d'attache (6) monté sur la bande (5).Lifting device according to any one of the preceding claims, characterized in that the strip (5) comprises an auxiliary strip (24) forming a safety loop enclosing a fastening member (6) mounted on the strip (5). Appareil de levage selon l'une quelconque des revendications précédentes, caractérisé en ce que la bande (5) passe sur un rouleau (26) d'écartement supplémentaire, de manière à augmenter la stabilité du levage.Lifting device according to any one of the preceding claims, characterized in that the strip (5) passes over a spacer roller (26) additional, so as to increase the stability of the lifting. Appareil de levage selon la revendication 8, caractérisé en ce que ledit rouleau (26) d'écartement supplémentaire et le premier rouleau d'écartement (20) sont montés sensiblement à la même hauteur et sensiblement symétriquement par rapport au plan vertical d'élévation de la charge. Lifting apparatus according to claim 8, characterized in that said roller (26) additional spacer and the first spacer roller (20) are mounted substantially at the same height and substantially symmetrical to the plane vertical load elevation. Appareil de levage selon la revendication 8 ou la revendication 9, caractérisé en ce que ledit rouleau (26) d'écartement supplémentaire forme dans la bande (5) un brin sensiblement vertical (27) s'enroulant sur le touret unique (4).Lifting device according to claim 8 or claim 9, characterized in that said additional spacer roller (26) forms in the strip (5) a substantially vertical strand (27) winding on the single reel (4).
EP99400121A 1998-01-21 1999-01-20 Hoist Expired - Lifetime EP0931757B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9800594 1998-01-21
FR9800594A FR2773792B1 (en) 1998-01-21 1998-01-21 HOIST TYPE LIFTING UNIT

Publications (2)

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EP0931757A1 true EP0931757A1 (en) 1999-07-28
EP0931757B1 EP0931757B1 (en) 2006-10-18

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EP99400121A Expired - Lifetime EP0931757B1 (en) 1998-01-21 1999-01-20 Hoist

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EP (1) EP0931757B1 (en)
DE (1) DE69933597T2 (en)
FR (1) FR2773792B1 (en)

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EP0082046A1 (en) * 1981-12-14 1983-06-22 Etudes Constructions Appareils Levage Lifting tackles
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US8292039B2 (en) 2006-03-22 2012-10-23 Jlg Industries, Inc. Mast lift and mast lift system
US8505688B2 (en) 2006-03-22 2013-08-13 Jlg Industries, Inc. Mast lift and mast lift system
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WO2016005335A1 (en) * 2014-07-11 2016-01-14 Terex Mhps Gmbh Heavy duty vehicle with a lifting apparatus for lifting and lowering a container

Also Published As

Publication number Publication date
FR2773792A1 (en) 1999-07-23
FR2773792B1 (en) 2000-03-31
US6109596A (en) 2000-08-29
EP0931757B1 (en) 2006-10-18
DE69933597D1 (en) 2006-11-30
DE69933597T2 (en) 2007-08-23

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