EP2688831B1 - Friction winch for the handling of loads - Google Patents

Friction winch for the handling of loads Download PDF

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Publication number
EP2688831B1
EP2688831B1 EP12702579.9A EP12702579A EP2688831B1 EP 2688831 B1 EP2688831 B1 EP 2688831B1 EP 12702579 A EP12702579 A EP 12702579A EP 2688831 B1 EP2688831 B1 EP 2688831B1
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EP
European Patent Office
Prior art keywords
wheel
pulley
hoist
pin
groove
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EP12702579.9A
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German (de)
French (fr)
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EP2688831A1 (en
Inventor
Myrtil OUVRARD
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Fixator
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Fixator
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Publication of EP2688831A1 publication Critical patent/EP2688831A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/54—Safety gear
    • B66D1/58—Safety gear responsive to excess of load
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/60—Rope, cable, or chain winding mechanisms; Capstans adapted for special purposes
    • B66D1/74—Capstans
    • B66D1/7415—Friction drives, e.g. pulleys, having a cable winding angle of less than 360 degrees
    • 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

Definitions

  • the present invention relates to an adhesion winch for handling loads.
  • a winch comprising at least one frame, a pulley mounted on said frame, said pulley comprising an axle and a wheel threaded onto said axle, said wheel, called a grooved wheel, being provided with an external peripheral groove for receiving a cable, means for rotating said wheel and holding means by support, able to exert a bearing force towards the bottom of the groove of the wheel, for a support by supporting the cable inside the throat of the wheel.
  • the adhesion winches have the characteristic of being able to be used with a cable of great length because of the principle of retention by adherence of the cable inside a single groove of the pulley, the width of the throat corresponding substantially the diameter of the cable to be received in the groove, so that the cable has only one winding turn around said pulley.
  • the winch with adhesion presents, in its zone of fixing to the material to equip, at least one force sensor.
  • This force sensor may be for example in the form of a spring disposed in the winch attachment zone equipment to equip.
  • An object of the present invention is therefore to provide an adhesion winch of the aforementioned type, the design of the means for detecting an overload makes it possible to dispense with a particular attachment of the winch equipment to equip.
  • Another object of the present invention is to provide an adhesion winch whose design means for detecting an overload allows a reliable and reproducible measurement.
  • Another object of the present invention is to provide an adhesion winch whose design makes it possible to limit the wear of said overload detection means in time.
  • the subject of the invention is an adhesion winch for handling loads, said winch comprising at least one frame, a pulley mounted on said frame, said pulley comprising an axle and a wheel threaded onto said axle, said wheel.
  • said grooved wheel being provided with an external peripheral groove for receiving a cable, means for driving in rotation of said wheel and means for holding by support, able to exert a bearing force in the direction the bottom of the groove of the wheel, for a support by supporting the cable inside the groove of the wheel, characterized in that the axis, called a torque axis, about which the pulley wheel is rotatably mounted, is equipped with means for measuring at least one magnitude representative of the at least radial forces or loads exerted on said axis and in that that the winch comprises a monitoring unit able to communicate with said measuring means, said monitoring unit being equipped with means for processing said at least one quantity measured by said measuring means and means for transmitting a signal of alerting and / or controlling means for rotating the pulley
  • the integration of the measuring means of at least one representative magnitude of the at least radial forces or loads exerted on said axis, inside the axis able to deform, in particular to bend, under the action of the weight load, allows to have reliable measuring means, compact and independent of the method of attachment of the winch equipment to equip.
  • the drive means for rotating the wheel of the pulley comprise at least one motor, preferably a geared motor, a driving member adapted to be driven in displacement by said motor, and a driven member disposed on the wheel of the pulley and engaged with said driving member, and, the driving member means for driving the pulley wheel in rotation and the means for holding by support for holding the cable inside the groove of the wheel of the pulley are arranged diametrically opposite around said wheel of the pulley.
  • This arrangement reduces the stress on the axis. Indeed, the radial forces acting on the wheel and resulting, the coming into engagement of the driving member with the driven member, and the support of the holding means, tend to cancel each other out, due to the diametral arrangement of the driving member and holding means, so that the axis does not undergo or the action of said forces.
  • the member driving means for driving the wheel of the pulley comprises at least one rotary pinion and the driven member of the means for driving the pulley wheel in rotation is a set circumferential toothing, preferably at the top of one of the flanks of the groove of the pulley wheel.
  • the support holding means for holding the cable inside the groove of the wheel of the pulley comprise at least one lifter equipped with two bearings inserted at least partially inside the groove of the wheel and mounted to rotation about an axis parallel to the axis of rotation of the wheel of the pulley, said spreader being equipped with a pivoting lever loaded by spring tending to bias said bearings bearing against the bottom of the groove.
  • the spreader with its two bearings is therefore disposed on a diametrical line of the wheel of the pulley passing through the axis of the wheel and the driving member means for driving the wheel in rotation.
  • the axis, around which the wheel of the pulley is mounted to rotate is an axis mounted on the frame, fixed at one of its ends, and free at its other end. The axis can thus flex under the action of the load.
  • the monitoring unit comprises input means of a threshold value, called overload
  • said processing means of said at least one measured quantity comprise means for comparing said at least one quantity measured by said measuring means with said overload threshold value
  • said means for transmitting an alert signal and / or for controlling the means for rotating the wheel are configured to emit an alert signal and / or stop in operation of the means for driving the wheel in the direction of a rise of the load, when the value of said at least one measured quantity is greater than at the predetermined overload threshold value.
  • threshold values can be defined to perform other actions: stop when laying the load on the ground (lack of load on the axis), stop when locking inside the winch (sudden change in the stress on the axis) ...
  • the axis, around which the pulley wheel is rotatably mounted is provided with an axial bore inside which are housed the measuring means of at least one representative of the magnitude of the forces or loads at least radial exerted on the axis.
  • the winch 1, object of the invention is an adhesion winch for handling loads. These loads can be varied and varied and include a platform for the elevation of people.
  • This winch 1 comprises at least one frame 2, and a pulley 3 mounted on said frame 2.
  • Said pulley 3 comprises an axis 4 and a wheel 5 threaded onto said axis 4.
  • This wheel 5 is provided with a circular external peripheral groove 6 for receiving a cable 20.
  • This groove 6 comprises a bottom and two flanges.
  • the winch 1 further comprises means 7 for rotating said wheel 5 about the axis 4 and means 15 for holding by support, able to exert a bearing force towards the bottom of the groove 6 of the wheel 5, for a support by supporting the cable inside the groove 6 of the wheel 5.
  • the cable 20 is equipped at one of its ends, generally, means of attachment to the load. It can also be fixed at one of its ends, in a fixed manner in elevation, and be coupled, via the frame 2 of the winch 1, to an element to be driven uphill and downhill, such as a platform .
  • the axis 4, called the dynamometric axis, around which the pulley wheel 3 is rotatably mounted is equipped with means 11 for measuring at least one magnitude representative of the forces or loads at least radial elements exerted on said axis 4, and the winch 1 comprises a monitoring unit 12, able to communicate with said measuring means 11, said monitoring unit being equipped with means 13 for processing said at least one quantity measured by said means 11 measurement and means 14 for transmitting an alert signal and / or for controlling means 7 for rotating the wheel 5 of the pulley 3 according to said at least one measured quantity.
  • the means 7 for rotating the wheel 5 of the pulley 3 comprise at least one motor 10, a driving member 8 adapted to be rotated by said motor, and a driven member 9 disposed on the wheel 5 of the pulley 3, and engaged with said member 8 leading.
  • the member 8 driving means 7 for driving in rotation of the wheel 5 of the pulley and the support holding means 15 for holding the cable 20 inside the groove 6 of the wheel 5 of the pulley 3 are arranged diametrically opposite around said wheel 5 of the pulley 3.
  • the driving member 8 is a centrally recessed rotating gear to be able to be threaded onto the motor shaft of the geared motor 10 and is rotated by the latter.
  • the axis of rotation of the pinion is parallel to the axis of rotation of the axis 4 of the wheel.
  • This pinion meshes with a circumferential toothing disposed at the top of one of the flanks of the groove 6 of the wheel 5 of the pulley 3, and forming the member 9 led means 7 for driving in rotation the wheel 5 of the pulley 3.
  • the support holding means 15, for holding the cable 20 inside the groove 6 of the wheel 5 of the pulley 3, comprise at least one spreader 16 equipped with two bearings 17 inserted at least partially inside. of the groove 6 of the wheel 5 and rotatably mounted about an axis parallel to the axis of rotation of the wheel 5 of the pulley 3.
  • Said spreader 16 is equipped with a lever 19 pivotally loaded by spring 19 tending to recall said bearings 17 against the bottom of the groove 6.
  • the gear / gear meshing zone is thus arranged around the wheel 5 of the pulley 3 in a diametrically opposite manner with respect to the assembly formed by the rudder 16 and the bearings 17.
  • the spring 19 of the lever 18 which tends to act on the lever 18 in the direction of bearing of the bearings 17 against the bottom of the groove extends between the lever 18 and frame 2.
  • This spring 19 is formed of a plurality of spring washers, also called Belleville washers.
  • the frame 2 here is formed of two flanges which are disposed on either side of the wheel 5 of the pulley 3, in particular the faces of the wheel 5, each flange being hollowed out centrally to allow said flanges to be threaded onto axis 4 of the wheel 5 of the pulley 3.
  • the axis 4, around which the wheel 5 of the pulley 3 is rotatably mounted is an axis 4 mounted on the frame 2, fixed at one of its ends, and free at its other end, to facilitate a deformation of said axis 4.
  • One of the ends of the axis 4 is thus introduced into a recess of the flange and pinned or keyed inside said recess so as to be mounted fixed in translation and in rotation on said frame, while the other end of the axis 4 is simply introduced into a recess of the flange and mounted freely in rotation and in translation inside said recess to allow deformation, in particular a deflection under load of said axis when it undergoes a radial force via the wheel of the pulley 3.
  • This axis 4 is still equipped on the outside with ball bearings interposed between axle and wheel hub to allow free rotation mounting of the wheel 5 on said axis 4.
  • the axis 4, around which the pulley wheel 5 is rotatably mounted, is provided with an axial bore within which are housed the means 11 for measuring at least one representative magnitude of the at least radial forces or loads exercised on the axis.
  • the means 11 for measuring at least one magnitude representative of the at least radial forces or loads exerted on the axis comprise at least one strain gauge or deformation gauge.
  • These measuring means 11 further comprise means for acquiring the voltage across the gauge, said voltage being proportional to the force acting on the axis.
  • these measuring means may comprise four resistors including a strain gauge, arranged for form a Wheatstone bridge. The bridge is powered by an electric current. When a force is applied, the electrical resistance of a strain gauge is modified by the deformation. This resistance is measured by the balancing of the bridge and one can thus determine the force undergone by said axis.
  • the value of said at least one magnitude representative of the at least radial forces or loads exerted on said axis, measured by said measuring means, is transmitted to the monitoring unit 12.
  • the axis 4 is equipped at its end with a connector to the monitoring unit 12.
  • This monitoring unit 12 is housed in a housing also enclosing the motor 10 of the means 7 for driving the wheel in rotation, this housing abutting the flanges of the frame 2 described above as illustrated by FIG. figure 2 .
  • This monitoring unit 12 is equipped with means 13 for processing said at least one quantity measured by said measuring means 11, and means 14 for transmitting an alert signal and / or for controlling the means 7 for driving in rotation of the wheel 5 of the pulley 4 according to said at least one measured quantity.
  • the monitoring unit 12 comprises input means of a threshold value, called overload.
  • These input means are formed, for example, by a display equipping said housing. The operator selects using the display the desired overload threshold value.
  • the means 13 for processing said at least one measured quantity such as a microprocessor, comprise means for comparing said at least one quantity measured by said measuring means 11 with the overload value.
  • the means 14 for transmitting an alert signal and / or for controlling the means 7 driving in rotation of the wheel 5 are configured to emit an alert signal and / or stop in operation means 7 for rotating the wheel 5 in the direction of a rise of the load, when the value of said at least one measured variable is greater than the predetermined overload threshold value.
  • These means 14 for transmitting an alert signal may be formed by a flashing of the display or by an alarm device emitting an audible or visual signal.
  • the monitoring unit 12 comprises input means of a threshold value, said load setting.
  • Said means 13 for processing said at least one measured quantity of the monitoring unit 12 comprise means for comparing said at least one quantity measured by said measuring means 11 with said threshold value for placing the load.
  • Said means 14 for transmitting an alert signal and / or for controlling means 7 for rotating the wheel, of the monitoring unit 12, are configured to emit an alert signal and / or stopping in operation means 7 for driving the wheel in the direction of a descent of the load when the value of said at least one measured quantity is less than the predetermined threshold value of the load.
  • the display can therefore also allow entry by an operator of a threshold value of the load and can flash in case of an alert.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pulleys (AREA)

Description

La présente invention concerne un treuil à adhérence pour la manutention de charges.The present invention relates to an adhesion winch for handling loads.

Elle concerne plus particulièrement un treuil comprenant au moins un bâti, une poulie montée sur ledit bâti, ladite poulie comprenant un axe et une roue enfilée sur ledit axe, ladite roue, dite roue à gorge, étant munie d'une gorge périphérique externe pour la réception d'un câble, des moyens d'entraînement en rotation de ladite roue et des moyens de maintien par appui, aptes à exercer une force d'appui en direction du fond de la gorge de la roue, pour un maintien par appui du câble à l'intérieur de la gorge de la roue.It relates more particularly to a winch comprising at least one frame, a pulley mounted on said frame, said pulley comprising an axle and a wheel threaded onto said axle, said wheel, called a grooved wheel, being provided with an external peripheral groove for receiving a cable, means for rotating said wheel and holding means by support, able to exert a bearing force towards the bottom of the groove of the wheel, for a support by supporting the cable inside the throat of the wheel.

Un tel treuil est connu à travers le brevet US-4.005.852 .Such a winch is known through the patent US 4005852 .

Les treuils à adhérence ne doivent pas être confondus avec les treuils à tambour ou les treuils à mâchoires. En effet, les treuils à adhérence présentent la caractéristique de pouvoir être utilisés avec un câble de grande longueur du fait du principe de retenue par adhérence du câble à l'intérieur d'une gorge unique de la poulie, la largeur de la gorge correspondant sensiblement au diamètre du câble à recevoir dans la gorge, de sorte que le câble ne présente qu'un seul tour d'enroulement autour de ladite poulie.Gripping winches should not be confused with drum winches or jaw winches. Indeed, the adhesion winches have the characteristic of being able to be used with a cable of great length because of the principle of retention by adherence of the cable inside a single groove of the pulley, the width of the throat corresponding substantially the diameter of the cable to be received in the groove, so that the cable has only one winding turn around said pulley.

De tels treuils à adhérence sont plus particulièrement utilisés pour l'accès aux façades de bâtiments, l'accès aux zones de travail en gaines d'ascenseurs, en puits, en silo (...). Ils présentent par rapport aux autres treuils les avantages suivants :

  • Pas de limite de hauteur
  • Le treuil peut accompagner la charge.
Such adhesion winches are more particularly used for access to the facades of buildings, access to work areas in elevator shafts, wells, silo (...). They have the following advantages over other winches:
  • No height limit
  • The winch can accompany the load.

Jusqu'à présent, pour éviter une surcharge du treuil et garantir un arrêt du fonctionnement du treuil lors d'un déplacement de la capacité théorique du treuil, le treuil à adhérence présente, dans sa zone de fixation au matériel à équiper, au moins un capteur d'effort. Ce capteur d'effort peut se présenter par exemple sous forme d'un ressort disposé dans la zone de fixation du treuil au matériel à équiper.Until now, to prevent overloading of the winch and to guarantee a stop of the operation of the winch during a displacement of the theoretical capacity of the winch, the winch with adhesion presents, in its zone of fixing to the material to equip, at least one force sensor. This force sensor may be for example in the form of a spring disposed in the winch attachment zone equipment to equip.

Les inconvénients d'une telle solution sont multiples :

  • les moyens de mesure pour éviter une surcharge sont dédiés au treuil équipé,
  • les moyens de mesure pour éviter une surcharge imposent une fixation prédéterminée du treuil au matériel à équiper,
  • les moyens de mesure pour éviter une surcharge sont généralement très sensibles, et sont, de ce fait, difficiles à régler et manquent de précision.
The disadvantages of such a solution are multiple:
  • the measuring means to prevent overload are dedicated to the winch equipped,
  • the measuring means to prevent overloading impose a predetermined fixing of the winch to the equipment to be equipped,
  • the measuring means to avoid overload are generally very sensitive, and are therefore difficult to adjust and lack precision.

Un but de la présente invention est donc de proposer un treuil à adhérence du type précité dont la conception des moyens de détection d'une surcharge permet de s'affranchir d'une fixation particulière du treuil au matériel à équiper.An object of the present invention is therefore to provide an adhesion winch of the aforementioned type, the design of the means for detecting an overload makes it possible to dispense with a particular attachment of the winch equipment to equip.

Un autre but de la présente invention est de proposer un treuil à adhérence dont la conception des moyens de détection d'une surcharge permet une mesure fiable et reproductible.Another object of the present invention is to provide an adhesion winch whose design means for detecting an overload allows a reliable and reproducible measurement.

Un autre but de la présente invention est de proposer un treuil à adhérence dont la conception permet de limiter l'usure desdits moyens de détection d'une surcharge dans le temps.Another object of the present invention is to provide an adhesion winch whose design makes it possible to limit the wear of said overload detection means in time.

A cet effet, l'invention a pour objet un treuil à adhérence pour la manutention de charges, ledit treuil comprenant au moins un bâti, une poulie montée sur ledit bâti, ladite poulie comprenant un axe et une roue enfilée sur ledit axe, ladite roue, dite roue à gorge, étant munie d'une gorge périphérique externe pour la réception d'un câble, des moyens d'entraînement en rotation de ladite roue et des moyens de maintien par appui, aptes à exercer une force d'appui en direction du fond de la gorge de la roue, pour un maintien par appui du câble à l'intérieur de la gorge de la roue, caractérisé en ce que l'axe, appelé axe dynamométrique, autour duquel la roue de poulie est montée à rotation, est équipé de moyens de mesure d'au moins une grandeur représentative des forces ou charges au moins radiales exercées sur ledit axe et en ce que le treuil comprend une unité de surveillance apte à communiquer avec lesdits moyens de mesure, ladite unité de surveillance étant équipée de moyens de traitement de ladite au moins une grandeur mesurée par lesdits moyens de mesure et de moyens d'émission d'un signal d'alerte et/ou de commande des moyens d'entraînement en rotation de la roue de la poulie en fonction de ladite au moins une grandeur mesurée.For this purpose, the subject of the invention is an adhesion winch for handling loads, said winch comprising at least one frame, a pulley mounted on said frame, said pulley comprising an axle and a wheel threaded onto said axle, said wheel. , said grooved wheel, being provided with an external peripheral groove for receiving a cable, means for driving in rotation of said wheel and means for holding by support, able to exert a bearing force in the direction the bottom of the groove of the wheel, for a support by supporting the cable inside the groove of the wheel, characterized in that the axis, called a torque axis, about which the pulley wheel is rotatably mounted, is equipped with means for measuring at least one magnitude representative of the at least radial forces or loads exerted on said axis and in that that the winch comprises a monitoring unit able to communicate with said measuring means, said monitoring unit being equipped with means for processing said at least one quantity measured by said measuring means and means for transmitting a signal of alerting and / or controlling means for rotating the pulley wheel according to said at least one measured quantity.

L'intégration des moyens de mesure d'au moins une grandeur représentative des forces ou charges au moins radiales exercées sur ledit axe, à l'intérieur de l'axe apte à se déformer, en particulier à fléchir, sous l'action du poids de la charge, permet de disposer de moyens de mesure fiables, peu encombrants et indépendants du mode de fixation du treuil au matériel à équiper.The integration of the measuring means of at least one representative magnitude of the at least radial forces or loads exerted on said axis, inside the axis able to deform, in particular to bend, under the action of the weight load, allows to have reliable measuring means, compact and independent of the method of attachment of the winch equipment to equip.

De préférence, les moyens d'entraînement en rotation de la roue de la poulie comprennent au moins un moteur, de préférence un motoréducteur, un organe menant apte à être entraîné en déplacement par ledit moteur, et un organe mené disposé sur la roue de la poulie et en prise avec ledit organe menant, et, l'organe menant des moyens d'entraînement en rotation de la roue de la poulie et les moyens de maintien par appui pour le maintien du câble à l'intérieur de la gorge de la roue de la poulie sont disposés diamétralement opposés autour de ladite roue de la poulie.Preferably, the drive means for rotating the wheel of the pulley comprise at least one motor, preferably a geared motor, a driving member adapted to be driven in displacement by said motor, and a driven member disposed on the wheel of the pulley and engaged with said driving member, and, the driving member means for driving the pulley wheel in rotation and the means for holding by support for holding the cable inside the groove of the wheel of the pulley are arranged diametrically opposite around said wheel of the pulley.

Cette disposition permet de réduire la sollicitation de l'axe. En effet, les forces radiales s'exerçant sur la roue et résultant, de la venue en prise de l'organe menant avec l'organe mené, et de l'appui des moyens de maintien, tendent à s'annuler, du fait de la disposition diamétrale de l'organe menant et des moyens de maintien, de sorte que l'axe ne subit pas ou peu l'action desdites forces. Grâce à cette disposition, il est possible d'intégrer les moyens de mesure des forces radiales exercées sur l'axe à l'intérieur de l'axe tout en obtenant des résultats de la mesure qui sont essentiellement liés à l'action de la charge sur ledit axe. Il en résulte une moindre fatigue de l'axe.This arrangement reduces the stress on the axis. Indeed, the radial forces acting on the wheel and resulting, the coming into engagement of the driving member with the driven member, and the support of the holding means, tend to cancel each other out, due to the diametral arrangement of the driving member and holding means, so that the axis does not undergo or the action of said forces. With this arrangement, it is possible to integrate the means for measuring the radial forces exerted on the axis inside the axis while obtaining results of the measurement which are essentially related to the action of the load on said axis. This results in less fatigue of the axis.

De préférence, l'organe menant des moyens d'entraînement en rotation de la roue de la poulie comprend au moins un pignon rotatif et l'organe mené des moyens d'entraînement en rotation de la roue de la poulie est une denture circonférentielle disposée, de préférence, au sommet d'un des flancs de la gorge de la roue de la poulie.Preferably, the member driving means for driving the wheel of the pulley comprises at least one rotary pinion and the driven member of the means for driving the pulley wheel in rotation is a set circumferential toothing, preferably at the top of one of the flanks of the groove of the pulley wheel.

Les moyens de maintien par appui pour le maintien du câble à l'intérieur de la gorge de la roue de la poulie comprennent au moins un palonnier équipé de deux roulements insérés au moins partiellement à l'intérieur de la gorge de la roue et montés à rotation autour d'un axe parallèle à l'axe de rotation de la roue de la poulie, ledit palonnier étant équipé d'un levier pivotant chargé par ressort tendant à rappeler lesdits roulements en appui contre le fond de la gorge.The support holding means for holding the cable inside the groove of the wheel of the pulley comprise at least one lifter equipped with two bearings inserted at least partially inside the groove of the wheel and mounted to rotation about an axis parallel to the axis of rotation of the wheel of the pulley, said spreader being equipped with a pivoting lever loaded by spring tending to bias said bearings bearing against the bottom of the groove.

Le palonnier avec ses deux roulements est donc disposé sur une ligne diamétrale de la roue de la poulie passant par l'axe de la roue et l'organe menant des moyens d'entraînement en rotation de la roue.The spreader with its two bearings is therefore disposed on a diametrical line of the wheel of the pulley passing through the axis of the wheel and the driving member means for driving the wheel in rotation.

Pour faciliter sa déformation, en particulier sous l'action de la charge, l'axe, autour duquel la roue de la poulie est montée à rotation, est un axe monté sur le bâti, fixe à l'une de ses extrémités, et libre à son autre extrémité. L'axe peut ainsi fléchir sous l'action de la charge.To facilitate its deformation, in particular under the action of the load, the axis, around which the wheel of the pulley is mounted to rotate, is an axis mounted on the frame, fixed at one of its ends, and free at its other end. The axis can thus flex under the action of the load.

De préférence, l'unité de surveillance comprend des moyens d'entrée d'une valeur seuil, dite de surcharge, et lesdits moyens de traitement de ladite au moins une grandeur mesurée comprennent des moyens de comparaison de ladite au moins une grandeur mesurée par lesdits moyens de mesure avec ladite valeur seuil de surcharge, et lesdits moyens d'émission d'un signal d'alerte et/ou de commande des moyens d'entraînement en rotation de la roue sont configurés pour émettre un signal d'alerte et/ou d'arrêt en fonctionnement des moyens d'entraînement en rotation de la roue dans le sens d'une montée de la charge, lorsque la valeur de ladite au moins une grandeur mesurée est supérieure à la valeur seuil de surcharge prédéterminée.Preferably, the monitoring unit comprises input means of a threshold value, called overload, and said processing means of said at least one measured quantity comprise means for comparing said at least one quantity measured by said measuring means with said overload threshold value, and said means for transmitting an alert signal and / or for controlling the means for rotating the wheel are configured to emit an alert signal and / or stop in operation of the means for driving the wheel in the direction of a rise of the load, when the value of said at least one measured quantity is greater than at the predetermined overload threshold value.

D'autres valeurs de seuil peuvent être définies pour réaliser d'autres actions : arrêt lors de la pose de la charge au sol (manque de charge sur l'axe), arrêt lors de blocage à l'intérieur du treuil (variation brusque de l'effort sur l'axe)...Other threshold values can be defined to perform other actions: stop when laying the load on the ground (lack of load on the axis), stop when locking inside the winch (sudden change in the stress on the axis) ...

Généralement, l'axe, autour duquel la roue de poulie est montée à rotation, est muni d'un alésage axial à l'intérieur duquel sont logés les moyens de mesure d'au moins une grandeur représentative des forces ou charges au moins radiales exercées sur l'axe.Generally, the axis, around which the pulley wheel is rotatably mounted, is provided with an axial bore inside which are housed the measuring means of at least one representative of the magnitude of the forces or loads at least radial exerted on the axis.

Il en résulte un faible encombrement de l'ensemble.This results in a small footprint of the assembly.

L'invention sera bien comprise à la lecture de la description suivante d'exemples de réalisation, en référence aux dessins annexés dans lesquels :

  • La figure 1 représente une vue partielle en coupe d'un treuil conforme à l'invention, l'unité de surveillance et le moteur ayant été omis ;
  • La figure 2 représente une vue de côté d'un treuil conforme à l'invention ;
  • La figure 3 représente une vue de face d'un treuil conforme à l'invention, une partie du bâti ayant été omise, et
  • La figure 4 représente une vue en perspective de l'axe autour duquel la roue de la poulie est montée à rotation.
The invention will be better understood on reading the following description of exemplary embodiments, with reference to the appended drawings in which:
  • The figure 1 represents a partial sectional view of a winch according to the invention, the monitoring unit and the motor having been omitted;
  • The figure 2 represents a side view of a winch according to the invention;
  • The figure 3 represents a front view of a winch according to the invention, part of the frame having been omitted, and
  • The figure 4 represents a perspective view of the axis about which the wheel of the pulley is rotatably mounted.

Comme mentionné ci-dessus, le treuil 1, objet de l'invention, est un treuil à adhérence destiné à la manutention de charges. Ces charges peuvent être diverses et variées et incluent notamment une plateforme pour l'élévation de personnes.As mentioned above, the winch 1, object of the invention is an adhesion winch for handling loads. These loads can be varied and varied and include a platform for the elevation of people.

Ce treuil 1 comprend au moins un bâti 2, et une poulie 3 montée sur ledit bâti 2. Ladite poulie 3 comprend un axe 4 et une roue 5 enfilée sur ledit axe 4. Cette roue 5 est munie d'une gorge 6 périphérique externe circulaire pour la réception d'un câble 20. Cette gorge 6 comprend un fond et deux flasques. Le treuil 1 comprend encore des moyens 7 d'entraînement en rotation de ladite roue 5 autour de l'axe 4 et des moyens 15 de maintien par appui, aptes à exercer une force d'appui en direction du fond de la gorge 6 de la roue 5, pour un maintien par appui du câble à l'intérieur de la gorge 6 de la roue 5.This winch 1 comprises at least one frame 2, and a pulley 3 mounted on said frame 2. Said pulley 3 comprises an axis 4 and a wheel 5 threaded onto said axis 4. This wheel 5 is provided with a circular external peripheral groove 6 for receiving a cable 20. This groove 6 comprises a bottom and two flanges. The winch 1 further comprises means 7 for rotating said wheel 5 about the axis 4 and means 15 for holding by support, able to exert a bearing force towards the bottom of the groove 6 of the wheel 5, for a support by supporting the cable inside the groove 6 of the wheel 5.

Le câble 20 est équipé à l'une de ses extrémités, généralement, de moyens d'accroche à la charge. Il peut être également fixé à l'une de ses extrémités, de manière fixe en élévation, et être couplé, par l'intermédiaire du bâti 2 du treuil 1, à un élément à entraîner en montée et en descente, tel qu'une plateforme.The cable 20 is equipped at one of its ends, generally, means of attachment to the load. It can also be fixed at one of its ends, in a fixed manner in elevation, and be coupled, via the frame 2 of the winch 1, to an element to be driven uphill and downhill, such as a platform .

De manière caractéristique à l'invention, l'axe 4, appelé axe dynamométrique, autour duquel la roue 5 de poulie 3 est montée à rotation, est équipé de moyens 11 de mesure d'au moins une grandeur représentative des forces ou charges au moins radiales exercées sur ledit axe 4, et le treuil 1 comprend une unité 12 de surveillance, apte à communiquer avec lesdits moyens 11 de mesure, ladite unité de surveillance étant équipée de moyens 13 de traitement de ladite au moins une grandeur mesurée par lesdits moyens 11 de mesure et de moyens 14 d'émission d'un signal d'alerte et/ou de commande des moyens 7 d'entraînement en rotation de la roue 5 de la poulie 3 en fonction de ladite au moins une grandeur mesurée.In a manner characteristic of the invention, the axis 4, called the dynamometric axis, around which the pulley wheel 3 is rotatably mounted, is equipped with means 11 for measuring at least one magnitude representative of the forces or loads at least radial elements exerted on said axis 4, and the winch 1 comprises a monitoring unit 12, able to communicate with said measuring means 11, said monitoring unit being equipped with means 13 for processing said at least one quantity measured by said means 11 measurement and means 14 for transmitting an alert signal and / or for controlling means 7 for rotating the wheel 5 of the pulley 3 according to said at least one measured quantity.

Comme mentionné ci-dessus, les moyens 7 d'entraînement en rotation de la roue 5 de la poulie 3 comprennent au moins un moteur 10, un organe 8 menant apte à être entraîné en rotation par ledit moteur, et un organe 9 mené disposé sur la roue 5 de la poulie 3, et en prise avec ledit organe 8 menant. L'organe 8 menant des moyens 7 d'entraînement en rotation de la roue 5 de la poulie et les moyens 15 de maintien par appui pour le maintien du câble 20 à l'intérieur de la gorge 6 de la roue 5 de la poulie 3 sont disposés diamétralement opposés autour de ladite roue 5 de la poulie 3.As mentioned above, the means 7 for rotating the wheel 5 of the pulley 3 comprise at least one motor 10, a driving member 8 adapted to be rotated by said motor, and a driven member 9 disposed on the wheel 5 of the pulley 3, and engaged with said member 8 leading. The member 8 driving means 7 for driving in rotation of the wheel 5 of the pulley and the support holding means 15 for holding the cable 20 inside the groove 6 of the wheel 5 of the pulley 3 are arranged diametrically opposite around said wheel 5 of the pulley 3.

Dans les exemples représentés, l'organe 8 menant est un pignon rotatif évidé centralement pour pouvoir être enfilé sur l'arbre moteur du moto-réducteur 10 et est entraîné en rotation par ce dernier.In the examples shown, the driving member 8 is a centrally recessed rotating gear to be able to be threaded onto the motor shaft of the geared motor 10 and is rotated by the latter.

L'axe de rotation du pignon est parallèle à l'axe de rotation de l'axe 4 de la roue. Ce pignon s'engrène avec une denture circonférentielle disposée au sommet d'un des flancs de la gorge 6 de la roue 5 de la poulie 3, et formant l'organe 9 mené des moyens 7 d'entraînement en rotation de la roue 5 de la poulie 3.The axis of rotation of the pinion is parallel to the axis of rotation of the axis 4 of the wheel. This pinion meshes with a circumferential toothing disposed at the top of one of the flanks of the groove 6 of the wheel 5 of the pulley 3, and forming the member 9 led means 7 for driving in rotation the wheel 5 of the pulley 3.

Les moyens 15 de maintien par appui, pour le maintien du câble 20 à l'intérieur de la gorge 6 de la roue 5 de la poulie 3, comprennent au moins un palonnier 16 équipé de deux roulements 17 insérés au moins partiellement à l'intérieur de la gorge 6 de la roue 5 et montés à rotation autour d'un axe parallèle à l'axe de rotation de la roue 5 de la poulie 3. Ledit palonnier 16 est équipé d'un levier 18 pivotant chargé par ressort 19 tendant à rappeler lesdits roulements 17 en appui contre le fond de la gorge 6.The support holding means 15, for holding the cable 20 inside the groove 6 of the wheel 5 of the pulley 3, comprise at least one spreader 16 equipped with two bearings 17 inserted at least partially inside. of the groove 6 of the wheel 5 and rotatably mounted about an axis parallel to the axis of rotation of the wheel 5 of the pulley 3. Said spreader 16 is equipped with a lever 19 pivotally loaded by spring 19 tending to recall said bearings 17 against the bottom of the groove 6.

La zone d'engrènement pignon/denture est donc disposée autour de la roue 5 de la poulie 3 de manière diamétralement opposée par rapport à l'ensemble formé du palonnier 16 et des roulements 17. Le ressort 19 du levier 18 qui tend à agir sur le levier 18 dans le sens d'un appui des roulements 17 contre le fond de la gorge s'étend entre levier 18 et bâti 2. Ce ressort 19 est formé d'une pluralité de rondelles ressort, encore appelées rondelles Belleville.The gear / gear meshing zone is thus arranged around the wheel 5 of the pulley 3 in a diametrically opposite manner with respect to the assembly formed by the rudder 16 and the bearings 17. The spring 19 of the lever 18 which tends to act on the lever 18 in the direction of bearing of the bearings 17 against the bottom of the groove extends between the lever 18 and frame 2. This spring 19 is formed of a plurality of spring washers, also called Belleville washers.

Le bâti 2 est ici formé de deux flasques qui sont disposés de part et d'autre de la roue 5 de la poulie 3, en particulier des faces de la roue 5, chaque flasque étant évidé centralement pour permettre auxdits flasques d'être enfilés sur l'axe 4 de la roue 5 de la poulie 3.The frame 2 here is formed of two flanges which are disposed on either side of the wheel 5 of the pulley 3, in particular the faces of the wheel 5, each flange being hollowed out centrally to allow said flanges to be threaded onto axis 4 of the wheel 5 of the pulley 3.

Dans les exemples représentés, l'axe 4, autour duquel la roue 5 de la poulie 3 est montée à rotation, est un axe 4 monté sur le bâti 2, fixe à l'une de ses extrémités, et libre à son autre extrémité, pour faciliter une déformation dudit axe 4.In the examples shown, the axis 4, around which the wheel 5 of the pulley 3 is rotatably mounted, is an axis 4 mounted on the frame 2, fixed at one of its ends, and free at its other end, to facilitate a deformation of said axis 4.

L'une des extrémités de l'axe 4 est donc introduite dans un évidement du flasque et goupillée ou clavetée à l'intérieur dudit évidement de manière à être montée fixe en translation et en rotation sur ledit bâti, tandis que l'autre extrémité de l'axe 4 est simplement introduite dans un évidement du flasque et montée libre en rotation et en translation à l'intérieur dudit évidement pour permettre une déformation, notamment un fléchissement sous charge dudit axe lorsqu'il subit un effort radial via la roue de la poulie 3.One of the ends of the axis 4 is thus introduced into a recess of the flange and pinned or keyed inside said recess so as to be mounted fixed in translation and in rotation on said frame, while the other end of the axis 4 is simply introduced into a recess of the flange and mounted freely in rotation and in translation inside said recess to allow deformation, in particular a deflection under load of said axis when it undergoes a radial force via the wheel of the pulley 3.

Cet axe 4 est encore équipé extérieurement de roulements à billes interposés entre axe et moyeu de roue pour permettre un montage libre à rotation de la roue 5 sur ledit axe 4.This axis 4 is still equipped on the outside with ball bearings interposed between axle and wheel hub to allow free rotation mounting of the wheel 5 on said axis 4.

L'axe 4, autour duquel la roue 5 de poulie est montée à rotation, est muni d'un alésage axial à l'intérieur duquel sont logés les moyens 11 de mesure d'au moins une grandeur représentative des forces ou charges au moins radiales exercées sur l'axe.The axis 4, around which the pulley wheel 5 is rotatably mounted, is provided with an axial bore within which are housed the means 11 for measuring at least one representative magnitude of the at least radial forces or loads exercised on the axis.

Les moyens 11 de mesure d'au moins une grandeur représentative des forces ou charges au moins radiales exercées sur l'axe comprennent au moins une jauge de contrainte ou de déformation.The means 11 for measuring at least one magnitude representative of the at least radial forces or loads exerted on the axis comprise at least one strain gauge or deformation gauge.

Ces moyens 11 de mesure comprennent en outre des moyens d'acquisition de la tension aux bornes de la jauge, ladite tension étant proportionnelle à la force qui agit sur l'axe. A titre d'exemple, ces moyens de mesure peuvent comprendre quatre résistances dont une jauge de contrainte, disposées pour former un pont de Wheatstone. On alimente le pont par un courant électrique. Lorsqu'on applique une force, la résistance électrique d'une jauge de contrainte est modifiée par la déformation. Cette résistance se mesure par l'équilibrage du pont et on peut ainsi déterminer l'effort subi par ledit axe.These measuring means 11 further comprise means for acquiring the voltage across the gauge, said voltage being proportional to the force acting on the axis. By way of example, these measuring means may comprise four resistors including a strain gauge, arranged for form a Wheatstone bridge. The bridge is powered by an electric current. When a force is applied, the electrical resistance of a strain gauge is modified by the deformation. This resistance is measured by the balancing of the bridge and one can thus determine the force undergone by said axis.

Ainsi l'axe dynamométrique intégrant de tels moyens de mesure commercialisé par la Société Magtrol sous la référence LE-LU 210 donne de bons résultats.Thus the torque axis incorporating such measurement means marketed by the Magtrol Company under the reference LE-LU 210 gives good results.

La valeur de ladite au moins une grandeur représentative des forces ou charges au moins radiales exercées sur ledit axe, mesurée par lesdits moyens de mesure, est transmise à l'unité 12 de surveillance.The value of said at least one magnitude representative of the at least radial forces or loads exerted on said axis, measured by said measuring means, is transmitted to the monitoring unit 12.

A cet effet, l'axe 4 est équipé, à son extrémité, d'un connecteur à l'unité 12 de surveillance. Cette unité 12 de surveillance est logée dans un boîtier renfermant également le moteur 10 des moyens 7 d'entraînement en rotation de la roue, ce boîtier jouxtant les flasques du bâti 2 décrit ci-dessus comme l'illustre la figure 2.For this purpose, the axis 4 is equipped at its end with a connector to the monitoring unit 12. This monitoring unit 12 is housed in a housing also enclosing the motor 10 of the means 7 for driving the wheel in rotation, this housing abutting the flanges of the frame 2 described above as illustrated by FIG. figure 2 .

Cette unité 12 de surveillance est équipée de moyens 13 de traitement de ladite au moins une grandeur mesurée par lesdits moyens 11 de mesure, et de moyens 14 d'émission d'un signal d'alerte et/ou de commande des moyens 7 d'entraînement en rotation de la roue 5 de la poulie 4 en fonction de ladite au moins une grandeur mesurée.This monitoring unit 12 is equipped with means 13 for processing said at least one quantity measured by said measuring means 11, and means 14 for transmitting an alert signal and / or for controlling the means 7 for driving in rotation of the wheel 5 of the pulley 4 according to said at least one measured quantity.

En particulier, l'unité 12 de surveillance comprend des moyens d'entrée d'une valeur seuil, dite de surcharge. Ces moyens d'entrée sont formés, par exemple, par un afficheur équipant ledit boîtier. L'opérateur sélectionne à l'aide dudit afficheur la valeur seuil de surcharge souhaitée. Les moyens 13 de traitement de ladite au moins une grandeur mesurée, tels qu'un microprocesseur, comprennent des moyens de comparaison de ladite au moins une grandeur mesurée par lesdits moyens 11 de mesure avec la valeur de surcharge. Les moyens 14 d'émission d'un signal d'alerte et/ou de commande des moyens 7 d'entraînement en rotation de la roue 5 sont configurés pour émettre un signal d'alerte et/ou d'arrêt en fonctionnement des moyens 7 d'entraînement en rotation de la roue 5 dans le sens d'une montée de la charge, lorsque la valeur de ladite au moins une grandeur mesurée est supérieure à la valeur seuil de surcharge prédéterminée. Ces moyens 14 d'émission d'un signal d'alerte peuvent être formés par un clignotement de l'afficheur ou par un dispositif d'alarme émettant un signal sonore ou visuel.In particular, the monitoring unit 12 comprises input means of a threshold value, called overload. These input means are formed, for example, by a display equipping said housing. The operator selects using the display the desired overload threshold value. The means 13 for processing said at least one measured quantity, such as a microprocessor, comprise means for comparing said at least one quantity measured by said measuring means 11 with the overload value. The means 14 for transmitting an alert signal and / or for controlling the means 7 driving in rotation of the wheel 5 are configured to emit an alert signal and / or stop in operation means 7 for rotating the wheel 5 in the direction of a rise of the load, when the value of said at least one measured variable is greater than the predetermined overload threshold value. These means 14 for transmitting an alert signal may be formed by a flashing of the display or by an alarm device emitting an audible or visual signal.

De préférence, l'unité 12 de surveillance comprend des moyens d'entrée d'une valeur seuil, dite de pose de la charge. Lesdits moyens 13 de traitement de ladite au moins une grandeur mesurée de l'unité 12 de surveillance comprennent des moyens de comparaison de ladite au moins une grandeur mesurée par lesdits moyens 11 de mesure avec ladite valeur seuil de pose de la charge. Lesdits moyens 14 d'émission d'un signal d'alerte et/ou de commande des moyens 7 d'entraînement en rotation de la roue, de l'unité 12 de surveillance, sont configurés pour émettre un signal d'alerte et/ou d'arrêt en fonctionnement des moyens 7 d'entraînement en rotation de la roue dans le sens d'une descente de la charge lorsque la valeur de ladite au moins une grandeur mesurée est inférieure à la valeur seuil prédéterminée de pose de la charge.Preferably, the monitoring unit 12 comprises input means of a threshold value, said load setting. Said means 13 for processing said at least one measured quantity of the monitoring unit 12 comprise means for comparing said at least one quantity measured by said measuring means 11 with said threshold value for placing the load. Said means 14 for transmitting an alert signal and / or for controlling means 7 for rotating the wheel, of the monitoring unit 12, are configured to emit an alert signal and / or stopping in operation means 7 for driving the wheel in the direction of a descent of the load when the value of said at least one measured quantity is less than the predetermined threshold value of the load.

L'afficheur peut donc également permettre l'entrée par un opérateur d'une valeur seuil de pose de la charge et peut clignoter en cas d'alerte.The display can therefore also allow entry by an operator of a threshold value of the load and can flash in case of an alert.

Le fonctionnement d'un tel treuil à adhérence est similaire à un treuil à adhérence classique en ce qui concerne la montée et la descente de la charge à l'aide du câble 20.The operation of such an adhesion winch is similar to a conventional grip winch with respect to the raising and lowering of the load by means of the cable 20.

Claims (9)

  1. A friction grip hoist (1) for handling loads, said hoist comprising: at least one body (2); a pulley (3) mounted on said body (2), said pulley (3) comprising a pin (4) and a wheel (5) arranged on said pin (4), said wheel (5), referred to as a "grooved" wheel, being provided with an outer peripheral groove (6) for receiving a cable (20); drive means (7) for driving rotation of said wheel (5); and holder means (15) by pressing suitable for exerting a thrust force towards the bottom of the groove (6) of the wheel (5) in order to hold the cable (20) inside the groove (6) of the wheel (5) by pressing thereagainst; characterized in that the pin (4), known as a "dynamometer" pin, about which the wheel (5) of the pulley (3) is mounted to rotate is fitted with measurement means (11) for measuring at least one magnitude representative of the at least radial forces or loads exerted on said pin (4), and in that the hoist (1) includes a monitor unit (12) suitable for communicating with said measurement means (11), said monitor unit (12) being fitted with processor means (13) for processing said at least one magnitude measured by said measurement means (11) and with means (14) for issuing an alert signal and/or for controlling the means (7) for driving rotation of the wheel (5) of the pulley (3) as a function of said at least one measured magnitude.
  2. A hoist (1) according to claim 1, characterized in that the means (7) for driving rotation of the wheel (5) of the pulley (3) comprise at least one motor (10), a driving member (8) suitable for being driven in movement by said motor (10), and a driven member (9) arranged on the wheel (5) of the pulley (3) and engaging with said driving member (8), and in that the driving member (8) of the means (7) for driving rotation of the wheel (5) of the pulley and the holder means (15) for holding the cable (20) inside the groove (6) of the wheel (5) of the pulley (3) are arranged in diametrically opposite positions around said wheel (5) of the pulley (3).
  3. A hoist (1) according to claim 2, characterized in that the driving member (8) of the means (7) for driving rotation of the wheel (5) of the pulley (3) comprise at least one rotary gearwheel, and in that the driven member (9) of the means for driving rotation of the wheel of the pulley comprises a circumferential set of teeth preferably arranged at the top of one of the flanks of the groove (6) of the wheel (5) of the pulley (3).
  4. A hoist (1) according to any preceding claim, characterized in that the holder means (15) for holding the cable (20) inside the groove (6) of the wheel (5) of the pulley (3) comprise at least one rocker (16) fitted with two rollers (17) inserted at least in part inside the groove (6) of the wheel (5) and mounted to rotate about respective axes parallel to the axis of rotation of the wheel (5) of the pulley (3), said rocker (16) being fitted with a pivot lever (18) loaded by a spring (19) urging said rollers (17) to press against the bottom of the groove (6).
  5. A hoist (1) according to any preceding claim, characterized in that the pin (4) about which the wheel (5) of the pulley (3) is mounted to rotate is a pin (4) mounted on the body (2), being fastened at one of its ends and free at its other end in order to facilitate deformation of said pin (4).
  6. A hoist (1) according to any preceding claim, characterized in that the monitor unit (12) has means for inputting an "overload" threshold value, in that said processor means (13) of processing said at least one measured magnitude comprise means for comparing said at least one magnitude measured by said measurement means (11) with said overload threshold value, and in that said means (14) for issuing an alert signal and/or for controlling the means (7) for driving rotation of the wheel (5) are configured to issue an alert signal and/or to stop the operation of the means (7) for driving rotation of the wheel in the load-raising direction when the value of said at least one measured magnitude is greater than the predetermined overload threshold value.
  7. A hoist (1) according to any preceding claim, characterized in that the monitor unit (12) has means for inputting a load-deposition threshold value, in that said processor means (13) of processing said at least one measured magnitude comprise means for comparing said at least one magnitude measured by said measurement means (11) with said load-deposition threshold value, and in that said means (14) for issuing an alert signal and/or for controlling the means (7) for driving rotation of the wheel (5) are configured to issue an alert signal and/or to stop the operation of the means (7) for driving rotation of the wheel in the load-lowering direction when the value of said at least one measured magnitude is less than the predetermined load-deposition threshold value.
  8. A hoist (1) according to any preceding claim, characterized in that the pin (4) about which the pulley wheel (5) is mounted to rotate is provided with an axial bore receiving the means (11) for measuring at least one magnitude representative of the at least radial forces or loads exerted on the pin.
  9. A hoist (1) according to any preceding claim, characterized in that the means (11) for measuring at least one magnitude representative of the at least radial forces or loads exerted on the pin comprise at least one strain gauge.
EP12702579.9A 2011-03-23 2012-01-03 Friction winch for the handling of loads Active EP2688831B1 (en)

Applications Claiming Priority (2)

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FR1152422A FR2973021B1 (en) 2011-03-23 2011-03-23 ADHESIVE WINCH FOR HANDLING LOADS
PCT/FR2012/050009 WO2012127137A1 (en) 2011-03-23 2012-01-03 Good-grip winch for handling loads

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EP2688831B1 true EP2688831B1 (en) 2014-11-12

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Also Published As

Publication number Publication date
FR2973021B1 (en) 2013-04-05
EP2688831A1 (en) 2014-01-29
WO2012127137A1 (en) 2012-09-27
US20140014887A1 (en) 2014-01-16
US9284171B2 (en) 2016-03-15
FR2973021A1 (en) 2012-09-28

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