EP2621589B1 - Cable winder for fall-arrest lifeline comprising a brake and cable reserve - Google Patents

Cable winder for fall-arrest lifeline comprising a brake and cable reserve Download PDF

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Publication number
EP2621589B1
EP2621589B1 EP11779762.1A EP11779762A EP2621589B1 EP 2621589 B1 EP2621589 B1 EP 2621589B1 EP 11779762 A EP11779762 A EP 11779762A EP 2621589 B1 EP2621589 B1 EP 2621589B1
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EP
European Patent Office
Prior art keywords
cable
drum
fastening means
winder
brake
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.)
Not-in-force
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EP11779762.1A
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German (de)
French (fr)
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EP2621589A1 (en
Inventor
Patrick Copin
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Tractel SAS
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Tractel SAS
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Publication date
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Priority to PL11779762T priority Critical patent/PL2621589T3/en
Publication of EP2621589A1 publication Critical patent/EP2621589A1/en
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Publication of EP2621589B1 publication Critical patent/EP2621589B1/en
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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B35/00—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion
    • A62B35/0093—Fall arrest reel devices
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B1/00—Devices for lowering persons from buildings or the like
    • A62B1/06—Devices for lowering persons from buildings or the like by making use of rope-lowering devices
    • A62B1/08—Devices for lowering persons from buildings or the like by making use of rope-lowering devices with brake mechanisms for the winches or pulleys
    • A62B1/10—Devices for lowering persons from buildings or the like by making use of rope-lowering devices with brake mechanisms for the winches or pulleys mechanically operated
    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B35/00—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion
    • A62B35/04—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion incorporating energy absorbing means

Definitions

  • the present invention relates to a fall-prevention safety line cable winder with brake and cable reserve. It has applications in the field of personal safety.
  • Fall arrest devices are known in the form of cable reels.
  • the cable is connected to a user and the winder is fixed at a holding point.
  • the winder comprises a centrifugal brake which, when it detects an angular acceleration of the drum on which the cable is wound, greater than a fixed limit, blocks and brakes the cable and makes it possible to stop the fall of the cable more or less gradually. user.
  • the cable can unwind or wind up, as the case may be, in the reel.
  • the present invention provides a means for achieving fall braking even when the cable has been fully unwound under normal conditions of use.
  • the present invention proposes an alternative solution in which only the drum can be affected by the effects of the fall releasing the cable reserve. Preferably, after a fall, careful examination of the material must be performed and deteriorated components must be changed.
  • a means for detachably fastening the cable to its winding drum is implemented at a determined distance from the end end of the cable attached to the axis of the drum.
  • This securing means yields or is released in case of significant traction on the cable may correspond to a fall but not for normal and normal traction on the cable.
  • a reserve of cable is released in case of a fall and the cable can continue to unfold so that the brake can act.
  • the invention relates to a braking safety line cable retractor, said retractor, intended to be fixed to an anchor point; comprising in a housing a centrifugal brake for braking the unwinding of the cable in case of a fall, the cable winding on a drum from a first end fixed to the axis of said drum, the second end of the cable coming out of the winder and having means for gripping a load.
  • the wound cable is further secured to the drum at a determined distance from said first end by a removable fastening means, said securing means ceasing to retain the cable on the drum when a traction greater than a threshold of predefined triggering is applied to the cable in order to release said determined cable distance
  • the detachable fastening means being an elongated rod substantially parallel to the axis of rotation of the drum and disposed in an opening in the hub of said drum, the drum being in a material plastic and the securing means being a metal rod fixed in the drum, and the opening of the hub of the drum allows access to the axis of rotation of the drum for passage of the end of the cable for terminal fixing loop of said cable on said axis of rotation and the rod is disposed in said opening.
  • the winder 1 is partly disassembled and the drum 2 and a part of the other elements of the winder including, upwardly, a fastener 9 to a fixed point and downwardly a piece of cable guide 10 cable entry / exit of the winder.
  • the drum 2 is shown in section and only one of the two flanges 3 of said drum is seen.
  • the cable is wound on the drum between the flanges on the hub 4 of said drum.
  • the cable has been unrolled almost completely and there remains about a half turn of cable length that can take place before the normal termination of the unwinding of the cable.
  • the stop is qualified as normal because it corresponds to an unwinding of a normal traction of the cable but not to a pull due to a fall, in which case the traction force would be much higher.
  • the cable is secured by a detachable fastening means 5 to the drum at a determined distance from its end end fixed to the axis of rotation of the drum.
  • This securing means is resistant to the normal tensile forces, which causes the normal termination of the unwinding of the cable when the removable fastening means comes substantially down, in relation to the cable guide piece 10.
  • the portion of cable that can be unwound before the normal stop is called useful cable 6a and in the example shown it remains about a half turn at the hub 4 of useful cable length 6a can be unwound.
  • the portion of cable between the removable fastening means 5 and its end end attached to the drum is called a dead turn cable 6b.
  • the length of the dead tower cable 6b corresponds substantially to a rotation of drum hub.
  • the end fixing of the end of the cable, part of dead turn cable 6b in this case, is obtained by producing a closed loop 8 which surrounds the axis of rotation of the drum. It is understood that another type of attachment to the drum is possible for the end of the cable as long as this terminal fastener withstands the tensile forces encountered during falls.
  • the resistance of retention of the cable on the drum can be defined by a trigger threshold corresponding to the minimum tensile force that must be applied to the cable, the winder being held at a fixed point, so that the removable fastening means 5 stops holding the cable on the drum.
  • the removable securing means 5 is here a metal rod which is inserted into the plastic drum.
  • the rod is elongated substantially parallel to the axis of rotation of the drum and is placed substantially at or slightly below the hub of the drum in an opening of the hub made towards the center of the drum, which opening here corresponds to a cable passage making it possible to produce the end loop 8 for fixing the cable to the axis of rotation of the drum.
  • the securing means 5 when a tensile force greater than the trigger threshold is imposed on it, will be pulled substantially radially outwardly of the drum by the cable, which will cause its folding and / or fracture and / or its removal of the drum and thus the release of the dead tower part of the cable. This release will allow the unfolding of this dead turn part of the cable and the action of the brake. It is also understood that this embodiment is non-reversible, disposable, because the removable fastening means and / or the drum undergoes or undergo irreversible deformation and / or breaks. It is then necessary to change the drum and removable securing means to reuse the reel with all its capabilities.
  • the securing means in particular when it is irreversible or reversible but then requiring a human action to restore it, may be used as a fall indicator, its break (or that of a part of the drum) or its erasure indicating that a fall took place with the release of the dead turns.
  • the dead tower cable length may correspond to more than one revolution of the drum, but in this case it is ensured that the dead turn cable which passes over (radially outwardly of the drum) the detachable fastening means does not interfere. with it, which could change the trigger.
  • the dead tower is turned laterally by means of detachable fastening (side of the hub without opening) or the securing means is placed towards the inside of the hub. in the opening of the hub so that the cable back in bridge above and away from the securing means.
  • the cable dead turn under (inwardly radially of the drum) is made to repass the detachable fastening means.
  • the Figure 2 allows to better visualize on the drum 2, the hub 4 and the removable fastening means 5 disposed in the opening of the hub.
  • the opening of the hub is of reduced width while not extending from one flange 3 to the other 3.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Storage Of Web-Like Or Filamentary Materials (AREA)
  • Emergency Lowering Means (AREA)
  • Refuge Islands, Traffic Blockers, Or Guard Fence (AREA)
  • Tension Adjustment In Filamentary Materials (AREA)
  • Unwinding Of Filamentary Materials (AREA)

Description

La présente invention concerne un enrouleur de câble de ligne de sécurité antichute à frein et réserve de câble. Elle a des applications dans le domaine de la sécurité des personnes.The present invention relates to a fall-prevention safety line cable winder with brake and cable reserve. It has applications in the field of personal safety.

On connaît des dispositifs de retenue en cas de chute se présentant sous forme d'enrouleurs de câbles. Le câble est relié à un utilisateur et l'enrouleur est fixé en un point de retenue. L'enrouleur comporte un frein centrifuge qui, lorsqu'il détecte une accélération angulaire du tambour sur lequel est enroulé le câble, supérieure à une limite fixée, bloque et freine le câble et permet d'arrêter plus ou moins progressivement la chute de l'utilisateur. Par contre, lors des déplacements et mouvements normaux de l'utilisateur, le câble peut se dérouler ou s'enrouler, selon le cas, dans l'enrouleur.Fall arrest devices are known in the form of cable reels. The cable is connected to a user and the winder is fixed at a holding point. The winder comprises a centrifugal brake which, when it detects an angular acceleration of the drum on which the cable is wound, greater than a fixed limit, blocks and brakes the cable and makes it possible to stop the fall of the cable more or less gradually. user. On the other hand, during the movements and normal movements of the user, the cable can unwind or wind up, as the case may be, in the reel.

Ainsi, lors d'une chute, l'utilisateur est arrêté dans sa chute d'une manière plus ou moins progressive et, de toute façon, d'une manière non brutale. Il en résulte moins de contraintes sur l'utilisateur et sur les équipements, l'énergie d'arrêt de chute étant dissipée dans le frein. Il en résulte également un moindre risque de blessure de l'utilisateur et de casse de l'équipement.Thus, during a fall, the user is stopped in his fall in a more or less progressive manner and, in any case, in a non-brutal manner. This results in fewer constraints on the user and the equipment, the fall arrest energy being dissipated in the brake. This also results in a lower risk of injury to the user and breakage of the equipment.

Si ce type de dispositif de retenue apporte des services utiles, une difficulté persiste dans le cas où le câble a été complètement déroulé ou presque complètement déroulé avant que la chute ne se produise. Dans ce cas, le câble ne peut plus se dérouler ou pas suffisamment et le frein ne peut plus agir correctement : il n'y a plus de possibilité de freinage progressif et l'arrêt de la chute est alors brutal avec pour conséquence les risques évoqués sur l'utilisateur et l'équipement.If this type of restraint provides useful services, a difficulty persists in the case where the cable has been completely unrolled or almost fully unwound before the fall occurs. In this case, the cable can not unwind or not enough and the brake can no longer act properly: there is no longer any possibility of progressive braking and the stop of the fall is then brutal with consequent risks mentioned on the user and the equipment.

La présente invention propose un moyen qui permet d'obtenir un freinage de chute même lorsque le câble a été complètement déroulé dans les conditions normales d'utilisation.The present invention provides a means for achieving fall braking even when the cable has been fully unwound under normal conditions of use.

Si on connaît par le document EP 272 908 un enrouleur à réserve de câble, ce dernier met en oeuvre des moyens qui sont indépendants du tambour sur lequel est enroulé le câble. Il en résulte par exemple qu'en cas de chute, il peut être nécessaire de changer, outre le câble et le tambour auquel il est fixé par son extrémité de câble, d'autres parties de l'enrouleur.If we know from the document EP 272 908 a retractor cable reserve, the latter implements means which are independent of the drum on which is wound the cable. This results for example that in case of a fall, it may be necessary to change, in addition to the cable and the drum to which it is attached by its cable end, other parts of the reel.

On connaît également des enrouleurs par les documents WO2008/008225 et US 2005/023085 . Toutefois, dans ces enrouleurs, la disposition du moyen permettant d'obtenir une réserve de câble interfère avec l'enroulement naturel du câble.Reels are also known from the documents WO2008 / 008225 and US 2005/023085 . However, in these reels, the arrangement of the means for obtaining a reserve of cable interferes with the natural winding of the cable.

On connaît également un enrouleur à réserve de câble par le document US 2009/0084631A et qui comporte un moyen de solidarisation amovible dans un logement spécifique du tambour d'enroulement de câble.Also known is a winder with cable reserve by the document US 2009 / 0084631A and which comprises a detachable fastening means in a specific housing of the cable winding drum.

La présente invention propose une solution alternative dans laquelle seul le tambour peut être concerné par les effets de la chute libérant la réserve de câble. Préférablement, après une chute, l'examen minutieux du matériel doit être réalisé et les composants détériorés doivent être changés.The present invention proposes an alternative solution in which only the drum can be affected by the effects of the fall releasing the cable reserve. Preferably, after a fall, careful examination of the material must be performed and deteriorated components must be changed.

Pour cela un moyen de solidarisation amovible du câble sur son tambour d'enroulement est mis en oeuvre à une distance déterminée de l'extrémité terminale du câble fixée à l'axe du tambour. Ce moyen de solidarisation cède ou se libère en cas de traction important sur le câble pouvant correspondre à une chute mais pas pour les tractions habituelles et normales sur le câble. Ainsi, une réserve de câble est libérée en cas de chute et le câble peut continuer à se dérouler pour que le frein puisse agir.For this purpose, a means for detachably fastening the cable to its winding drum is implemented at a determined distance from the end end of the cable attached to the axis of the drum. This securing means yields or is released in case of significant traction on the cable may correspond to a fall but not for normal and normal traction on the cable. Thus, a reserve of cable is released in case of a fall and the cable can continue to unfold so that the brake can act.

Plus précisément, l'invention concerne un enrouleur de câble de ligne de sécurité antichute à frein, ledit enrouleur, destiné à être fixé à un point d'ancrage; comportant dans un boîtier un frein centrifuge destiné à freiner le déroulement du câble en cas de chute, le câble s'enroulant sur un tambour depuis une première extrémité fixée à l'axe dudit tambour, la seconde extrémité du câble sortant de l'enrouleur et comportant un moyen d'accrochage à une charge.More specifically, the invention relates to a braking safety line cable retractor, said retractor, intended to be fixed to an anchor point; comprising in a housing a centrifugal brake for braking the unwinding of the cable in case of a fall, the cable winding on a drum from a first end fixed to the axis of said drum, the second end of the cable coming out of the winder and having means for gripping a load.

Selon l'invention, le câble enroulé est en outre solidarisé au tambour à une distance déterminée de ladite première extrémité par un moyen de solidarisation amovible, ledit moyen de solidarisation cessant de retenir le câble sur le tambour lorsqu'une traction supérieure à un seuil de déclenchement prédéfini est appliquée au câble afin de libérer ladite distance déterminée de câble, le moyen de solidarisation amovible étant une tige allongée sensiblement parallèlement à l'axe de rotation du tambour et disposée dans une ouverture du moyeu dudit tambour, le tambour étant dans une matière plastique et le moyen de solidarisation étant une tige métallique fixée dans le tambour, et l'ouverture du moyeu du tambour permet l'accès à l'axe de rotation du tambour pour passage de l'extrémité du câble pour fixation terminale en boucle dudit câble sur ledit axe de rotation et la tige est disposée dans ladite ouverture.According to the invention, the wound cable is further secured to the drum at a determined distance from said first end by a removable fastening means, said securing means ceasing to retain the cable on the drum when a traction greater than a threshold of predefined triggering is applied to the cable in order to release said determined cable distance, the detachable fastening means being an elongated rod substantially parallel to the axis of rotation of the drum and disposed in an opening in the hub of said drum, the drum being in a material plastic and the securing means being a metal rod fixed in the drum, and the opening of the hub of the drum allows access to the axis of rotation of the drum for passage of the end of the cable for terminal fixing loop of said cable on said axis of rotation and the rod is disposed in said opening.

Dans divers modes de mise en oeuvre de l'invention, les moyens suivants pouvant être utilisés seuls ou selon toutes les combinaisons techniquement possibles, sont employés :

  • la charge est un opérateur équipé d'un harnais et de ses éventuels outils,
  • le frein centrifuge est à disque,
  • le frein à disque se met en fonction lorsque l'accélération angulaire détectée par le dispositif centrifuge est supérieure à un seuil de d'activation,
  • le seuil de déclenchement correspond à une traction du câble supérieure aux tractions habituellement exercées sur le câble mais inférieure à une traction due à une chute de la charge,
  • le moyen de solidarisation amovible est réversible, le câble pouvant être resolidarisé au tambour après que le moyen de solidarisation ait cessé de retenir le câble sur le tambour suite à une traction appliquée au câble supérieure au seuil de déclenchement,
  • dans le cas où le câble peut être resolidarisé au tambour, la resolidarisation nécessite une intervention humaine,
  • dans le cas où le câble peut être resolidarisé au tambour, la resolidarisation est automatique,
  • le moyen de solidarisation amovible est irréversible, le moyen de solidarisation cédant ou s'effaçant définitivement suite à une traction appliquée au câble supérieure au seuil de déclenchement,
  • le moyen de solidarisation est un témoin de chute,
  • l'enrouleur comporte des moyens tels que dans le cas d'un moyen de solidarisation amovible irréversible, le tambour et son moyen de solidarisation ne sont plus réutilisables suite à une traction appliquée au câble supérieure au seuil de déclenchement, par exemple parce que le tambour s'est déformé ou s'est rompu en partie,
  • l'enrouleur comporte des moyens tels que dans le cas d'un moyen de solidarisation amovible irréversible, le tambour est réutilisable suite à une traction appliquée au câble supérieure au seuil de déclenchement, un moyen de solidarisation de remplacement étant installé sur ledit tambour, seul le moyen de solidarisation ayant cédé ou s'étant effacé,
  • la distance déterminée du câble entre sa première extrémité fixée à l'axe du tambour et le moyen de solidarisation amovible est telle qu'il reste entre un tour et trois tours de câble libérable sur le tambour,
  • la distance déterminée du câble entre sa première extrémité fixée à l'axe du tambour et le moyen de solidarisation amovible est telle qu'il reste environ un tour de câble sur le tambour,
  • la distance déterminée du câble entre sa première extrémité fixée à l'axe du tambour et le moyen de solidarisation amovible est telle qu'il reste au moins un tour de câble sur le tambour,
  • la distance déterminée du câble entre sa première extrémité fixée à l'axe du tambour et le moyen de solidarisation amovible est telle qu'il reste moins de trois tours de câble sur le tambour,
  • dans le cas où plus d'un tour reste disponible sur le tambour, l'enrouleur est configuré pour que la partie de câble libérable n'interfère pas avec le fonctionnement du moyen de solidarisation amovible, notamment en ne coinçant pas ou ne repassant pas sur ledit moyen de solidarisation amovible,
  • la cessation de la solidarisation est progressive par exemple par pliage d'une goupille solidarisant d'une manière amovible le câble sur le tambour,
  • la cessation de la solidarisation est brutale par exemple par cassure d'une goupille solidarisant d'une manière amovible le câble sur le tambour et/ou cassure de la zone de fixation du moyen de solidarisation sur le tambour,
  • l'enrouleur comporte en outre un moyen de rappel et d'enroulement automatique du câble sous forme d'un ressort de rappel agissant sur le tambour,
  • l'enrouleur comporte en outre un moyen d'enroulement manuel du câble sous forme d'une manivelle,
  • le point de retenue est fixe, par exemple un piton, crochet,
  • le point de retenue est mobile, par exemple un coulisseau de ligne de vie ou un bras mobile de pylône support,
  • l'enrouleur comporte plusieurs moyens de solidarisation amovibles pouvant céder ou s'effacer les uns à la suite des autres lors d'une même chute,
  • l'enrouleur comporte plusieurs moyens de solidarisation amovibles cédant ou s'effaçant les uns à la suite des autres, chute après chute,
  • le moyen de solidarisation est une tige métallique fixée dans le tambour,
  • la tige métallique est disposée sensiblement à la hauteur du moyeu du tambour,
  • le moyen de solidarisation est une attache de câble fixée sur le moyeu du tambour,
  • le moyen de solidarisation est une attache de câble fixée sur un des deux flasques latéraux du tambour,
  • l'attache de câble est une patte en oméga passant en pont sur le câble,
  • l'attache de câble est un serre clip en nylon,
  • le frein est métallique,
  • le frein centrifuge comporte un moyen d'embrayage dudit frein par action de la force centrifuge.
In various embodiments of the invention, the following means can be used alone or in any technically possible combination, are employed:
  • the load is an operator equipped with a harness and its possible tools,
  • the centrifugal brake is disc,
  • the disc brake is activated when the angular acceleration detected by the centrifugal device is greater than an activation threshold,
  • the tripping threshold corresponds to a traction of the cable superior to the tractions usually exerted on the cable but lower than a traction due to a fall of the load,
  • the removable securing means is reversible, the cable being resollarized to the drum after the securing means has stopped retaining the cable on the drum following traction applied to the cable greater than the trigger threshold,
  • in the case where the cable can be resolidarized to the drum, the resolidarization requires human intervention,
  • in the case where the cable can be resolidarized with the drum, the resolidarization is automatic,
  • the detachable fastening means is irreversible, the securing means permanently giving up or disappearing due to traction applied to the cable greater than the triggering threshold,
  • the securing means is a fall indicator,
  • the retractor comprises means such that in the case of an irreversible removable fastening means, the drum and its securing means are no longer reusable following a traction applied to the cable greater than the trigger threshold, for example because the drum has distorted or broken in part,
  • the retractor comprises means such that in the case of an irreversible removable fastening means, the drum is reusable following traction applied to the upper cable to the trigger threshold, a replacement fastening means being installed on said drum, only the joining means having yielded or having been erased,
  • the determined distance of the cable between its first end fixed to the axis of the drum and the removable securing means is such that there remains between one turn and three towers of cable releasable on the drum,
  • the determined distance of the cable between its first end fixed to the axis of the drum and the removable securing means is such that there remains approximately one turn of cable on the drum,
  • the determined distance of the cable between its first end fixed to the axis of the drum and the removable fastening means is such that at least one turn of cable remains on the drum,
  • the determined distance of the cable between its first end fixed to the axis of the drum and the removable securing means is such that less than three turns of cable remain on the drum,
  • in the case where more than one revolution remains available on the drum, the winder is configured so that the releasable cable portion does not interfere with the operation of the removable fastening means, in particular by not jamming or ironing on said removable fastening means,
  • the termination of the joining is progressive for example by folding a pin securely securing the cable to the drum,
  • the termination of the joining is abrupt, for example by breaking a pin removably securing the cable to the drum and / or breaking the fastening area of the securing means on the drum,
  • the winder further comprises a return means and automatic winding of the cable in the form of a return spring acting on the drum,
  • the winder further comprises means for manually winding the cable in the form of a crank,
  • the point of restraint is fixed, for example a peak, hook,
  • the holding point is movable, for example a lifeline slider or a mobile support pole arm,
  • the winder comprises a plurality of removable fastening means which can yield or disappear one after the other during the same fall,
  • the winder comprises several removable securing means yielding or fading one after another, fall after fall,
  • the securing means is a metal rod fixed in the drum,
  • the metal rod is disposed substantially at the height of the hub of the drum,
  • the securing means is a cable tie attached to the hub of the drum,
  • the securing means is a cable tie attached to one of the two side flanges of the drum,
  • the cable tie is an omega leg bridging the cable,
  • the cable tie is a nylon clip holder,
  • the brake is metallic,
  • the centrifugal brake comprises means for clutching said brake by the action of the centrifugal force.

La présente invention, sans qu'elle en soit pour autant limitée, va maintenant être exemplifiée avec la description qui suit de modes de réalisation et de mise en oeuvre en relation avec :

  • la Figure 1 qui représente une coupe d'une partie d'un enrouleur selon l'invention, et
  • la Figure 2 qui représente une vue en perspective d'une partie d'un enrouleur selon l'invention.
The present invention, without it being so limited, will now be exemplified with the following description of embodiments and implementation in relation to:
  • the Figure 1 which represents a section of a part of a winder according to the invention, and
  • the Figure 2 which represents a perspective view of a portion of a winder according to the invention.

Sur les Figures simplifiées qui vont maintenant être décrites, on n'a pas représenté tous les organes de l'enrouleur comme par exemple le frein, le dispositif de rappel du câble permettant son enroulement après qu'il ait été déroulé, des éventuels organes de blocage et/ou déblocage du fonctionnement.In the simplified figures which will now be described, not all the members of the winder such as for example the brake, the cable return device for its winding after it has been unwound, any organs of blocking and / or unblocking the operation.

Sur la Figure 1, l'enrouleur 1 est en partie démonté et on a conservé le tambour 2 et une partie des autres éléments de l'enrouleur dont, vers le haut, une pièce de fixation 9 à un point fixe et, vers le bas, une pièce de guidage 10 de câble en entrée/sortie de câble de l'enrouleur. Toujours Figure 1, le tambour 2 est représenté en coupe et on ne voit qu'un des deux flasques 3 dudit tambour. Le câble est enroulé sur le tambour entre les flasques, sur le moyeu 4 dudit tambour. Sur cette Figure explicative le câble a été déroulé presque complètement et il reste environ un demi tour de longueur de câble qui puisse se dérouler avant l'arrêt normal du déroulement du câble. L'arrêt est qualifié de normal car il correspond à un déroulement du à une traction normale du câble mais pas à une traction due à une chute, dans lequel cas l'effort de traction serait bien supérieur. En effet, le câble est solidarisé par un moyen de solidarisation amovible 5 au tambour à une distance déterminée de son extrémité terminale fixée à l'axe de rotation du tambour. Ce moyen de solidarisation résiste aux efforts de tractions normaux, ce qui provoque l'arrêt normal du déroulement du câble lorsque ce moyen de solidarisation amovible vient sensiblement en bas, en relation avec la pièce de guidage 10 de câble. La partie de câble qui peut être déroulée avant l'arrêt normal est qualifiée de câble utile 6a et dans l'exemple représenté il reste environ un demi tour au niveau du moyeu 4 de longueur de câble utile 6a qui peut être déroulée. Par contre, si l'effort de traction sur le câble est supérieur à la résistance de retenue du moyen de solidarisation amovible 5, ce dernier s'efface et/ou cède ce qui libère le reste du câble vers son extrémité terminale fixée à l'axe de rotation du tambour d'une manière telle que cette fixation résiste aux efforts dus à des chutes.On the Figure 1 , the winder 1 is partly disassembled and the drum 2 and a part of the other elements of the winder including, upwardly, a fastener 9 to a fixed point and downwardly a piece of cable guide 10 cable entry / exit of the winder. Always Figure 1 the drum 2 is shown in section and only one of the two flanges 3 of said drum is seen. The cable is wound on the drum between the flanges on the hub 4 of said drum. In this explanatory figure the cable has been unrolled almost completely and there remains about a half turn of cable length that can take place before the normal termination of the unwinding of the cable. The stop is qualified as normal because it corresponds to an unwinding of a normal traction of the cable but not to a pull due to a fall, in which case the traction force would be much higher. Indeed, the cable is secured by a detachable fastening means 5 to the drum at a determined distance from its end end fixed to the axis of rotation of the drum. This securing means is resistant to the normal tensile forces, which causes the normal termination of the unwinding of the cable when the removable fastening means comes substantially down, in relation to the cable guide piece 10. The portion of cable that can be unwound before the normal stop is called useful cable 6a and in the example shown it remains about a half turn at the hub 4 of useful cable length 6a can be unwound. On the other hand, if the traction force on the cable is greater than the retention resistance of the removable fastening means 5, the latter disappears and / or gives way, which releases the rest of the cable towards its end end fixed to the rotation axis of the drum in such a way that this fixation resists the forces due to falls.

La partie de câble entre le moyen de solidarisation amovible 5 et son extrémité terminale fixée au tambour est qualifiée de câble tour mort 6b. Dans l'exemple représenté, la longueur du câble tour mort 6b correspond sensiblement à un tour de moyeu de tambour. La fixation terminale de l'extrémité du câble, partie de câble tour mort 6b en l'espèce, est obtenue par réalisation d'une boucle fermée 8 qui entoure l'axe de rotation du tambour. On comprend qu'un autre type de fixation au tambour est possible pour l'extrémité du câble du moment que cette fixation terminale résiste aux efforts de traction rencontrés lors de chutes. On peut définir la résistance de retenue du câble sur le tambour par un seuil de déclenchement correspondant à l'effort de traction minimum qu'il faut appliquer au câble, l'enrouleur étant maintenu à un point fixe, pour que le moyen de solidarisation amovible 5 cesse de retenir le câble sur le tambour.The portion of cable between the removable fastening means 5 and its end end attached to the drum is called a dead turn cable 6b. In the example shown, the length of the dead tower cable 6b corresponds substantially to a rotation of drum hub. The end fixing of the end of the cable, part of dead turn cable 6b in this case, is obtained by producing a closed loop 8 which surrounds the axis of rotation of the drum. It is understood that another type of attachment to the drum is possible for the end of the cable as long as this terminal fastener withstands the tensile forces encountered during falls. The resistance of retention of the cable on the drum can be defined by a trigger threshold corresponding to the minimum tensile force that must be applied to the cable, the winder being held at a fixed point, so that the removable fastening means 5 stops holding the cable on the drum.

Le moyen de solidarisation amovible 5 est ici une tige métallique qui est insérée dans le tambour en matière plastique. La tige est allongée sensiblement parallèlement à l'axe de rotation du tambour et est placée sensiblement au niveau ou un peu en dessous du moyeu du tambour dans une ouverture du moyeu pratiquée vers le centre du tambour, ouverture qui correspond ici à un passage de câble permettant de réaliser la boucle terminale 8 de fixation du câble à l'axe de rotation du tambour.The removable securing means 5 is here a metal rod which is inserted into the plastic drum. The rod is elongated substantially parallel to the axis of rotation of the drum and is placed substantially at or slightly below the hub of the drum in an opening of the hub made towards the center of the drum, which opening here corresponds to a cable passage making it possible to produce the end loop 8 for fixing the cable to the axis of rotation of the drum.

On comprend que le moyen de solidarisation 5, lorsqu'un effort de traction supérieur au seuil de déclenchement lui est imposé, va être tiré sensiblement radialement vers l'extérieur du tambour par le câble, ce qui va provoquer son pliage et/ou cassure et/ou son arrachage du tambour et donc la libération de la partie tour mort du câble. Cette libération va permettre le déroulement de cette partie tour mort du câble et l'action du frein. On comprend également que ce mode de réalisation est non réversible, à usage unique, car le moyen de solidarisation amovible et/ou le tambour subit ou subissent des déformations et/ou cassures irréversibles. Il est alors nécessaire de changer le tambour et le moyen de solidarisation amovible pour pouvoir réutiliser l'enrouleur avec toutes ses capacités.It is understood that the securing means 5, when a tensile force greater than the trigger threshold is imposed on it, will be pulled substantially radially outwardly of the drum by the cable, which will cause its folding and / or fracture and / or its removal of the drum and thus the release of the dead tower part of the cable. This release will allow the unfolding of this dead turn part of the cable and the action of the brake. It is also understood that this embodiment is non-reversible, disposable, because the removable fastening means and / or the drum undergoes or undergo irreversible deformation and / or breaks. It is then necessary to change the drum and removable securing means to reuse the reel with all its capabilities.

Le moyen de solidarisation, en particulier lorsqu'il est irréversible ou réversible mais nécessitant alors une action humaine pour le rétablir, peut être utilisé comme un témoin de chute, sa rupture (ou celle d'une partie du tambour) ou son effacement signalant qu'une chute a eu lieu avec libération du/des tours morts.The securing means, in particular when it is irreversible or reversible but then requiring a human action to restore it, may be used as a fall indicator, its break (or that of a part of the drum) or its erasure indicating that a fall took place with the release of the dead turns.

La longueur de câble tour mort peut correspondre à plus d'un tour du tambour mais dans ce cas on veille à ce que le câble tour mort qui repasse sur (vers l'extérieur radialement du tambour) le moyen de solidarisation amovible n'interfère pas avec celui-ci, ce qui pourrait modifier le seuil de déclenchement. Parmi les solutions possible, on fait repasser le tour mort latéralement au moyen de solidarisation amovible (coté du moyeu sans ouverture) ou on place le moyen de solidarisation vers l'intérieur du moyeu dans l'ouverture du moyeu de façon à ce que le câble repasse en pont au dessus et à distance du moyen de solidarisation. En alternative, on fait repasser le câble tour mort sous (vers l'intérieur radialement du tambour) le moyen de solidarisation amovible.The dead tower cable length may correspond to more than one revolution of the drum, but in this case it is ensured that the dead turn cable which passes over (radially outwardly of the drum) the detachable fastening means does not interfere. with it, which could change the trigger. Among the possible solutions, the dead tower is turned laterally by means of detachable fastening (side of the hub without opening) or the securing means is placed towards the inside of the hub. in the opening of the hub so that the cable back in bridge above and away from the securing means. Alternatively, the cable dead turn under (inwardly radially of the drum) is made to repass the detachable fastening means.

La Figure 2 permet de mieux visualiser sur le tambour 2, le moyeu 4 et le moyen de solidarisation amovible 5 disposé dans l'ouverture du moyeu. De préférence, l'ouverture du moyeu est de largeur réduite en ne s'étendant pas d'un flasque 3 à l'autre 3.The Figure 2 allows to better visualize on the drum 2, the hub 4 and the removable fastening means 5 disposed in the opening of the hub. Preferably, the opening of the hub is of reduced width while not extending from one flange 3 to the other 3.

Bien entendu la présente invention n'est pas limitée aux modes de réalisation particuliers qui viennent d'être décrits, mais s'étend à toutes variantes et équivalents. Ainsi, on comprend bien que l'invention peut être déclinée selon de nombreuses autres possibilités sans pour autant sortir du cadre défini par la description et les revendications.Of course, the present invention is not limited to the particular embodiments which have just been described, but extends to all variants and equivalents. Thus, it is clear that the invention can be declined according to many other possibilities without departing from the scope defined by the description and the claims.

Claims (7)

  1. A winder (1) with a brake for fall protection lifeline cable (6a, 6b), said winder, intended to be attached to an anchoring point, comprising in a housing a centrifugal brake for slowing down the cable unwinding in the event of a fall, wherein the cable winds on a hub of a drum (2) from a first end attached to the shaft of said drum, with the second end of the cable coming out of the winder and comprising a means for coupling to a load, the wound cable being further fastened to the drum at a determined distance from said first end by a removable fastening means, said fastening means stopping to hold the cable on the drum when a traction force higher than a predefined triggering threshold is applied to the cable, so as to release said determined cable distance, the removable fastening means being a rod (5) extending substantially parallel to the rotation shaft of the drum and arranged in an opening of the hub of said drum, characterized in that the drum is made of plastic material and the fastening means is a metal rod (5) attached in the drum, and in that the opening of the drum hub offers access to the rotation shaft (7) of the drum for the passage of the cable end for terminal loop attachment (8) of said cable on said rotation shaft and in that the metal rod (5) is arranged in said opening.
  2. The winder according to claim 1, characterized in that the centrifugal brake is a disk brake.
  3. The winder according to claim 1 or 2, characterized in that the removable fastening means is irreversible, wherein the fastening means definitely gives way or steps aside following a traction force applied on the cable, which is higher than the triggering threshold.
  4. The winder according to claim 3, characterized in that it comprises such means that, in the case of an irreversible removable fastening means, the drum and its fastening means are no longer reusable following a traction force applied on the cable, which is higher than the triggering threshold.
  5. The winder according to claim 3, characterized in that it comprises such means that, in the case of an irreversible removable fastening means, the drum is reusable following a traction force applied on the cable, which is higher than the triggering threshold, a replacement fastening means being installed on said drum, as only the fastening means has given way or stepped aside.
  6. The winder according to any one of previous claims, characterized in that the determined distance of the cable between its first end attached to the drum shaft and the removable fastening means is such that it remains on the drum between one turn and three turns of releasable cable.
  7. The winder according to any one of previous claims, characterized in that it further comprises a means for automatic return and winding of the cable, in the form of a return spring acting on the drum.
EP11779762.1A 2010-09-29 2011-09-29 Cable winder for fall-arrest lifeline comprising a brake and cable reserve Not-in-force EP2621589B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL11779762T PL2621589T3 (en) 2010-09-29 2011-09-29 Cable winder for fall-arrest lifeline comprising a brake and cable reserve

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1057858A FR2965183B1 (en) 2010-09-29 2010-09-29 SAFETY LINE CABLE RETRACTOR FALL BRAKE AND CABLE RESERVE
PCT/FR2011/052277 WO2012042180A1 (en) 2010-09-29 2011-09-29 Cable winder for fall-arrest lifeline comprising a brake and cable reserve

Publications (2)

Publication Number Publication Date
EP2621589A1 EP2621589A1 (en) 2013-08-07
EP2621589B1 true EP2621589B1 (en) 2015-11-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP11779762.1A Not-in-force EP2621589B1 (en) 2010-09-29 2011-09-29 Cable winder for fall-arrest lifeline comprising a brake and cable reserve

Country Status (8)

Country Link
US (1) US20130200196A1 (en)
EP (1) EP2621589B1 (en)
CA (1) CA2813151C (en)
DK (1) DK2621589T3 (en)
ES (1) ES2563438T3 (en)
FR (1) FR2965183B1 (en)
PL (1) PL2621589T3 (en)
WO (1) WO2012042180A1 (en)

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TWI699323B (en) * 2019-09-04 2020-07-21 貿聯國際股份有限公司 Extension cord with retractable line structure

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FR3057170A1 (en) * 2016-10-12 2018-04-13 Vertic FALLING BRAKE DEVICE WITH ROLLING BRAKE
FR3069532B1 (en) * 2017-07-31 2019-09-06 Haulotte Group SAFETY SYSTEM AND LIFTING EQUIPMENT COMPRISING SUCH A SAFETY SYSTEM
EP3531522A1 (en) * 2018-02-27 2019-08-28 Maxamcorp Holding, S.L. Device adapted for winding a cable
RU192168U1 (en) * 2019-04-26 2019-09-05 Общество с ограниченной ответственностью "СЕЙФ-ТЕК" Shock-mounted shock absorber for retractor protection
CN112169209B (en) * 2019-07-03 2022-05-06 振锋企业股份有限公司 Steel cable type falling-proof device

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Also Published As

Publication number Publication date
DK2621589T3 (en) 2016-02-29
PL2621589T3 (en) 2016-07-29
EP2621589A1 (en) 2013-08-07
FR2965183A1 (en) 2012-03-30
ES2563438T3 (en) 2016-03-15
WO2012042180A1 (en) 2012-04-05
CA2813151C (en) 2018-02-13
CA2813151A1 (en) 2012-04-05
FR2965183B1 (en) 2013-08-16
US20130200196A1 (en) 2013-08-08

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