EP1380320A1 - Fall protection follower device along a fixed rope - Google Patents

Fall protection follower device along a fixed rope Download PDF

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Publication number
EP1380320A1
EP1380320A1 EP03354059A EP03354059A EP1380320A1 EP 1380320 A1 EP1380320 A1 EP 1380320A1 EP 03354059 A EP03354059 A EP 03354059A EP 03354059 A EP03354059 A EP 03354059A EP 1380320 A1 EP1380320 A1 EP 1380320A1
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EP
European Patent Office
Prior art keywords
roller
rope
fall arrest
support arm
arrest device
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP03354059A
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German (de)
French (fr)
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EP1380320B1 (en
Inventor
Paul Petzl
Alain Maurice
Christian Broquerie
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Zedel SAS
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Zedel SAS
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Publication date
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Publication of EP1380320A1 publication Critical patent/EP1380320A1/en
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    • 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
    • A62B1/14—Devices for lowering persons from buildings or the like by making use of rope-lowering devices with brakes sliding on the rope
    • 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

  • fall arrest devices follow the progression of the person along the rope without generating blocking.
  • the person is free to move without any intervention manual release of the fall arrest device.
  • the blocking occurs only in case of fall.
  • the restraint system of known fall arrest devices generally includes a pivoting lever having at one end an attachment ring for the connection to a shoulder belt, and at the opposite end a locking cam of the rope.
  • a pivoting lever having at one end an attachment ring for the connection to a shoulder belt, and at the opposite end a locking cam of the rope.
  • Such The arrangement behaves like a cleat which may prevent blocking if the user were to grip the lever in the event of a fall.
  • WO 00/24471 relates to a locking device bidirectional for a fall arrest apparatus, comprising a locking member equipped with two cams actuated independently by an organ of common blockage in response to a sudden change in weight.
  • the blocking of each of the cams depends on the inclination of the rope relative to the chassis of the device.
  • US 4923037 discloses a fall arrest device having a system of restraint consisting of an articulated support arm, which is equipped with a wheel cylindrical mounted free rotation, and a centrifugal mechanical coupling arranged in a ratchet.
  • the periphery of the wheel has a series of teeth constituting a pinion causing rotation of the wheel by friction with the cable.
  • the radial direction of the teeth does not allow to obtain a functioning optimum fall arrest system.
  • to insert the vertical lifeline in the fall arrest device it is necessary to make use of a U-shaped articulated, and to rotate outward, which complicates maneuvers.
  • the object of the invention is to provide a fall arrest apparatus for a fixed rope, to obtain maximum safety for the user in the event of a fall, regardless of the inclination of the rope or a handling error of the device.
  • the fall arrest device is characterized in that the surface roller device is provided with a plurality of pins arranged for generate a rotation of the roller in the direction of the descent, and a slip on the rope in the direction of the climb, and that the body has a chute rectilinear U-shaped for the passage of the rope, said chute having holes for the passage of fastening means.
  • the mechanical coupling is disposed inside the roller, and comprises at least one movable weight by centrifugal effect along a ramp as a function of speed or acceleration of the drive member of the roller.
  • the weight is associated with a spring of return biasing the mechanical coupling in the disengaged position, the threshold when the centrifugal force is greater than the force return spring.
  • a fall arrest device 10 is used for the safety of a person moving along a fixed 12 insurance rope.
  • a carabiner 14 is hooked to the fall arrest device 10 so as to be connected to the harness, either live, either through an absorption lanyard.
  • the fall arrest device 10 follows the progression of the person along the rope 12 without generating blocking. The person is free to move without any intervention Manual release of the fall arrest device 10.
  • the fall arrest device 10 is composed of a rigid body 16 and a control system.
  • mobile retainer 18 cooperating with the rope 12 to occupy either a position blocking function in the event of a fall, ie an inactive unlocking position in the direction of the climb, or in the opposite direction during a controlled descent.
  • the body 16 which is preferably metallic, comprises a straight trough 20 made of U shape for the passage of the rope 12, and a stirrup 22 for mounting a first axis 24 extending transversely to the direction of the chute 20.
  • the upper part of the chute 20 is pierced by two holes 23 to allow the passage of the carabiner 14 attachment to the harness.
  • the retaining member 18 comprises a support arm 26 articulated on the first axis 24, and a wheel-shaped roller 28 mounted for free rotation on a second axis 30 integral with the support arm 26.
  • the peripheral surface of the roller 28 is cylindrical, and is provided with a plurality of pins 32 each having an inclination predetermined with respect to the radial direction passing through the axis 30.
  • a spring torsion (not shown) is threaded on the first axis 24 and urges the arm support 26 in the direction of the chute 20.
  • the roller 28 is provided with an internal drive member 33, pierced by an orifice 34 central cylindrical, which is traversed by a tubular bearing 36 introduced on the second fixed axis 30. Inside the roller 28 is in addition a mechanical coupling 38 formed by a pair of weights 40 cylindrical arranged between opposite ramps 42 of the organ 33 and a circular flange 44 of the support arm 26.
  • Each weight 40 is associated with a spring 46 in the shape of a pin intended for urging the mechanical coupling 38 to the disengaged position when the normal use of the fall arrest device 10.
  • the 40 flyweights are in a hollow of the drive member 33, in order to interrupt the mechanical coupling 38 between the roller 28 and the arm 26.
  • the roller 28 is then rotated by the friction of the rope 12, while the support arm 26 is in the inactive position allowing the device fall arrest 10 to follow the progress of the user on the ascent or descent.
  • the restoring force of the springs 46 defines the coupling threshold as a function of the speed or acceleration of the drive member 33 of the rotary roller 28.
  • the abrupt rotation of the roller 28 on the axis 30 causes the displacement of the weights 40 by centrifugal effect to the engaged position. This movement is effected against the restoring force of the springs 46, and causes jamming of the weights 40 between the flange 44 and the body 33.
  • the mechanical coupling in the engaged position thus makes the roller 28 secured to the support arm 26, so as to form a cleat wedge capable of pivoting about the first axis 24, and blocking the fall by blocking the rope 12.
  • the pivoting support arm 26 is equipped with a stop 48 intended to cooperate with the carabiner 14 to limit the pivoting stroke of the arm 26 in the inactive unlock position. The response time of the support arm 26 pivoting is thus reduced to the minimum to obtain the blocking in case of fall.
  • the end of the stop 48 is provided with a protuberance 49 intended for intercalate between the two holes 23 of the body 16 to prevent the establishment carabiner 14 before the introduction of the rope 12.
  • the abrupt rotation of the roller and the drive member 33 in the clockwise subjects the weights 40 to a centrifugal force, which is higher and opposite to the restoring force of the springs 46.
  • the weights 40 move on the ramps 42, which causes jamming weights 40 between the flange 44 and the drive member 33.
  • the mechanical coupling is then in the engaged position, making the roller 28 secured to the support arm 26.
  • the assembly constitutes a jamming cleat rotatable clockwise about the first axis 24, and blocking the fall by blocking the rope 12. Unblocking the weights 40 intervenes by a manual action of the operator to maintain the roller 28 against the rope 12, and by raising the body 16 by a few centimeters.
  • the stop 48 is replaced by a security flap 50, which is arranged to fill the same functions of the abutment 48 of the preceding Figures 1-12, in addition to a positioning function of the rope 12 at the bottom of the chute 20 before the introduction of the carabiner 14 in the holes 23.
  • the safety flap 50 is pivotally mounted on an axis 52, and comprises a oblong aperture 54 inside which moves a lever of control 56 secured to the support arm 26.
  • the opening 54 has a double angled ramp for moving the flap 50 according to the pivoting movement of the arm 26.
  • the flap 50 further comprises a wing 58 intended to press the rope 12 at the bottom of the chute 20.

Abstract

The following fall-prevention device includes a fixed safety cord (12) equipped with a restraint system comprising an arm support articulated on a first axis (24) between active blocking and release positions. The device also includes a cylindrical roller (28) and a mechanical coupling arranged between a body of a roller drive device (33) and the arm support so as to occupy a disconnected position or a coupled position. The peripheral surface of the roller has a number of barbs (32) for enabling rotation of the roller in the direction of the descent, and a slip on the safety cord. The body (16) of the fall precentrion device comprises a U-shaped rectilinear chute for passage of the cord, with the chute having holes for the passage of a fastener attachable to the cord.

Description

Domaine technique de l'inventionTechnical field of the invention

L'invention est relative à un dispositif antichute suiveur utilisé avec une corde fixe de sécurité, et comprenant :

  • un corps équipé d'un système de retenue agencé pour occuper soit une position active de blocage en cas de chute, soit une position inactive de déblocage autorisant la progression de l'utilisateur le long de la corde dans le sens de la montée, ou dans le sens opposé lors d'une descente contrôlée, ledit système de retenue comportant un bras support articulé sur un premier axe du corps, un galet en forme de roue cylindrique montée à rotation libre sur un deuxième axe solidaire du bras support, et un accouplement mécanique centrifuge agencé entre un organe d'entraínement du galet et le bras support de manière à occuper une position débrayée ou une position embrayée,
  • et des moyens d'attache pour la liaison du corps à un baudrier d'assurance de l'utilisateur.
The invention relates to a follower anti-fall device used with a fixed safety rope, and comprising:
  • a body equipped with a retaining system arranged to occupy either an active blocking position in the event of a fall, or an inactive unlocking position allowing the progression of the user along the rope in the direction of the climb, or in the opposite direction during a controlled descent, said retaining system comprising a support arm articulated on a first axis of the body, a cylindrical wheel-shaped roller mounted for free rotation on a second axis integral with the support arm, and a mechanical coupling centrifugal arranged between a drive member of the roller and the support arm so as to occupy a disengaged position or an engaged position,
  • and attachment means for binding the body to a user's insurance belt.

Etat de la techniqueState of the art

Lors de l'utilisation normale de montée ou de descente, les dispositifs antichute suivent la progression de la personne le long de la corde sans engendrer de blocage. La personne est libre de se déplacer sans aucune intervention manuelle de déblocage du dispositif antichute. Le blocage intervient uniquement en cas de chute.During normal use of ascent or descent, fall arrest devices follow the progression of the person along the rope without generating blocking. The person is free to move without any intervention manual release of the fall arrest device. The blocking occurs only in case of fall.

Le système de retenue des dispositifs antichute connus comporte généralement un levier pivotant ayant à l'une des extrémités un anneau d'attache pour la liaison à un baudrier, et à l'extrémité opposée une came de blocage de la corde. Un tel agencement se comporte comme un taquet coinceur, lequel risque d'empêcher le blocage si l'utilisateur venait à s'agripper au levier en cas de chute.The restraint system of known fall arrest devices generally includes a pivoting lever having at one end an attachment ring for the connection to a shoulder belt, and at the opposite end a locking cam of the rope. Such The arrangement behaves like a cleat which may prevent blocking if the user were to grip the lever in the event of a fall.

Le document WO 00/24471 se rapporte à un dispositif de verrouillage bidirectionnel pour un appareil antichute, comprenant un organe de verrouillage équipé de deux cames actionnées de manière indépendante par un organe de blocage commun en réaction à un brusque changement de poids. Le blocage de chacune des cames dépend de l'inclinaison de la corde par rapport au châssis de l'appareil.WO 00/24471 relates to a locking device bidirectional for a fall arrest apparatus, comprising a locking member equipped with two cams actuated independently by an organ of common blockage in response to a sudden change in weight. The blocking of each of the cams depends on the inclination of the rope relative to the chassis of the device.

Le document US 4923037 décrit un dispositif antichute ayant un système de retenue composé d'un bras support articulé, lequel est équipé d'une roue cylindrique montée à rotation libre, et d'un accouplement mécanique centrifuge agencé en cliquet. La périphérie de la roue comporte une série de dents constituant un pignon provoquant la rotation de la roue par effet de friction avec le câble. La direction radiale des dents ne permet pas d'obtenir un fonctionnement optimum du dispositif antichute. De plus, pour insérer la ligne de vie verticale dans le dispositif antichute, il est nécessaire de faire usage d'une cornière en U articulée, et de la faire pivoter vers l'extérieur, ce qui complique les manoeuvres.US 4923037 discloses a fall arrest device having a system of restraint consisting of an articulated support arm, which is equipped with a wheel cylindrical mounted free rotation, and a centrifugal mechanical coupling arranged in a ratchet. The periphery of the wheel has a series of teeth constituting a pinion causing rotation of the wheel by friction with the cable. The radial direction of the teeth does not allow to obtain a functioning optimum fall arrest system. In addition, to insert the vertical lifeline in the fall arrest device, it is necessary to make use of a U-shaped articulated, and to rotate outward, which complicates maneuvers.

Objet de l'inventionObject of the invention

L'objet de l'invention consiste à réaliser un appareil antichute pour corde fixe, permettant d'obtenir une sécurité maximale de l'utilisateur en cas de chute, indépendamment de l'inclinaison de la corde ou d'une erreur de manipulation de l'appareil. The object of the invention is to provide a fall arrest apparatus for a fixed rope, to obtain maximum safety for the user in the event of a fall, regardless of the inclination of the rope or a handling error of the device.

Le dispositif antichute selon l'invention est caractérisé en ce que la surface périphérique du galet est munie d'une pluralité de picots agencés pour engendrer une rotation du galet dans le sens de la descente, et un glissement sur la corde dans le sens de la montée, et que le corps comporte une goulotte rectiligne en forme de U pour le passage de la corde, ladite goulotte ayant des trous pour le passage des moyens d'attache.The fall arrest device according to the invention is characterized in that the surface roller device is provided with a plurality of pins arranged for generate a rotation of the roller in the direction of the descent, and a slip on the rope in the direction of the climb, and that the body has a chute rectilinear U-shaped for the passage of the rope, said chute having holes for the passage of fastening means.

Lors de l'utilisation normale de montée ou de descente, l'accouplement se trouve en position débrayée, et le dispositif antichute suit la progression de la personne le long de la corde sans aucune intervention manuelle de déblocage du système de retenue. Le blocage intervient automatiquement en cas de chute, même si l'utilisateur s'agrippe à l'appareil. Dans ce cas, l'accouplement se trouve en position embrayée entraínant une forte pression du galet contre la corde.During normal use of ascent or descent, mating is in the disengaged position, and the fall arrest device follows the progression of the person along the rope without any manual intervention to unblock the system restraint. Blocking occurs automatically in case of a fall, even if the user clings to the device. In this case, the coupling is in engaged position causing a strong pressure of the roller against the rope.

Selon un mode de réalisation préférentiel, l'accouplement mécanique est disposé à l'intérieur du galet, et comprend au moins une masselotte mobile par effet centrifuge le long d'une rampe en fonction de la vitesse ou de l'accélération de l'organe d'entraínement du galet. La masselotte est associée à un ressort de rappel sollicitant l'accouplement mécanique en position débrayée, le seuil d'accouplement étant atteint lorsque la force centrifuge est supérieure à la force de rappel du ressort.According to a preferred embodiment, the mechanical coupling is disposed inside the roller, and comprises at least one movable weight by centrifugal effect along a ramp as a function of speed or acceleration of the drive member of the roller. The weight is associated with a spring of return biasing the mechanical coupling in the disengaged position, the threshold when the centrifugal force is greater than the force return spring.

Il est bien entendu possible d'utiliser tout autre type de dispositif d'embrayage destiné à bloquer le galet sur le bras support à une vitesse prédéterminée.It is of course possible to use any other type of clutch device for locking the roller on the support arm at a predetermined speed.

D'autres caractéristiques peuvent être utilisées isolément ou en combinaison :

  • la masselotte est de forme cylindrique, et coopère en position embrayée avec un rebord cylindrique du bras support ;
  • les moyens d'attache sont constitués par un mousqueton traversant des trous alignés du corps de l'appareil antichute ;
  • le bras support est doté de moyens de sécurité destinés à limiter la course de pivotement dudit bras dans la position inactive de déblocage, et à empêcher la mise en place du mousqueton avant l'introduction de la corde dans la goulotte ;
  • les moyens de sécurité comportent une butée solidaire du bras support, et ayant une extrémité équipée d'une protubérance ;
  • les moyens de sécurité comportent un volet monté à pivotement sur un axe, et comprenant une ouverture oblongue à l'intérieur de laquelle se déplace un levier de commande solidaire du bras support, et une aile destinée à plaquer la corde au fond de la goulotte.
Other features may be used singly or in combination:
  • the weight is of cylindrical shape, and cooperates in the engaged position with a cylindrical rim of the support arm;
  • the attachment means are constituted by a carabiner through aligned holes of the body of the fall arrest device;
  • the support arm is provided with safety means intended to limit the pivoting stroke of said arm in the inactive unlocking position, and to prevent the introduction of the carabiner before the introduction of the rope into the chute;
  • the safety means comprise an abutment integral with the support arm, and having an end equipped with a protuberance;
  • the security means comprise a flap pivotally mounted on an axis, and comprising an oblong opening inside which moves a control lever secured to the support arm, and a wing intended to press the rope at the bottom of the chute.

Description sommaire des dessinsBrief description of the drawings

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode de réalisation de l'invention donné à titre d'exemple non limitatif, et représenté aux dessins annexés dans lesquels:

  • la figure 1 est une vue en perspective de l'appareil antichute selon l'invention, lequel est installé sur une corde d'assurance après mise en place d'un mousqueton d'attache ;
  • la figure 2 montre une vue éclatée en perspective de l'appareil antichute de la figure 1, l'accouplement mécanique étant montré en position débrayée à l'intérieur du galet ;
  • la figure 3 est une vue de gauche de la figure 2, après démontage des masselottes ;
  • la figure 4 représente une vue en élévation de l'appareil après ouverture du système de retenue pour le passage de la corde ;
  • la figure 5 est une vue identique de la figure 4, et représente la position d'utilisation normale de montée ou de descente après mise en place du mousqueton ;
  • la figure 6 est une vue de dessus de la figure 5 ;
  • la figure 7 est une vue en coupe verticale de la figure 5 ;
  • les figures 8 et 9 sont des vues en coupe selon les lignes 8-8 et 9-9 de la figure 7 ;
  • la figure 10 montre une vue identique de la figure 7, l'appareil étant en position de blocage suite à une chute ;
  • la figure 11 montre la position anti-ouverture de sécurité suite à la venue en butée du système de retenue contre le mousqueton ;
  • la figure 12 est une vue en coupe de la figure 4, la butée se trouvant dans une position empêchant la mise en place du mousqueton ;
  • la figure 13 est une vue en perspective d'une variante de réalisation à volet de sécurité ;
  • la figure 14 est une vue identique de la figure 13 lors de l'ouverture du bras support pour la mise en place de la corde ;
  • les figures 15 à 17 sont des vues partiellement arrachées de la figure 13, respectivement après mise en place de la corde, en position de fonctionnement normal, et en position de blocage.
Other advantages and features will emerge more clearly from the following description of an embodiment of the invention given by way of non-limiting example, and represented in the appended drawings in which:
  • Figure 1 is a perspective view of the fall arrest device according to the invention, which is installed on a lifeline after installation of a carabiner attachment;
  • Figure 2 shows an exploded perspective view of the fall arrest apparatus of Figure 1, the mechanical coupling being shown in the disengaged position within the roller;
  • Figure 3 is a left view of Figure 2, after disassembly of the weights;
  • Figure 4 shows an elevational view of the apparatus after opening the restraint system for the passage of the rope;
  • Figure 5 is an identical view of Figure 4, and shows the normal use position rise or fall after installation of the carabiner;
  • Figure 6 is a top view of Figure 5;
  • Figure 7 is a vertical sectional view of Figure 5;
  • Figures 8 and 9 are sectional views along the lines 8-8 and 9-9 of Figure 7;
  • Figure 10 shows an identical view of Figure 7, the apparatus being in the blocking position following a fall;
  • Figure 11 shows the anti-safety opening position following the abutment of the retaining system against the carabiner;
  • Figure 12 is a sectional view of Figure 4, the stop being in a position preventing the introduction of the carabiner;
  • Figure 13 is a perspective view of an alternative embodiment with safety flap;
  • Figure 14 is an identical view of Figure 13 when opening the support arm for the establishment of the rope;
  • Figures 15 to 17 are partially cutaway views of Figure 13, respectively after implementation of the rope, in the normal operating position, and in the locking position.

Description de deux modes de réalisation préférentielsDescription of two preferred embodiments

Sur les figures 1 à 12, un dispositif antichute 10 est utilisé pour la sécurité d'une personne se déplaçant le long d'une corde 12 fixe d'assurance. Un mousqueton 14 est accroché au dispositif antichute 10 de manière à être relié au baudrier, soit en direct, soit par l'intermédiaire d'une longe à absorption.In FIGS. 1 to 12, a fall arrest device 10 is used for the safety of a person moving along a fixed 12 insurance rope. A carabiner 14 is hooked to the fall arrest device 10 so as to be connected to the harness, either live, either through an absorption lanyard.

Lors de l'utilisation normale de montée ou de descente, le dispositif antichute 10 suit la progression de la personne le long de la corde 12 sans engendrer de blocage. La personne est libre de se déplacer sans aucune intervention manuelle de déblocage du dispositif antichute 10.During normal use of ascent or descent, the fall arrest device 10 follows the progression of the person along the rope 12 without generating blocking. The person is free to move without any intervention Manual release of the fall arrest device 10.

Le dispositif antichute 10 est composé d'un corps 16 rigide et d'un système de retenue 18 mobile coopérant avec la corde 12 pour occuper soit une position active de blocage en cas de chute, soit une position inactive de déblocage dans le sens de la montée, ou dans le sens opposé lors d'une descente contrôlée.The fall arrest device 10 is composed of a rigid body 16 and a control system. mobile retainer 18 cooperating with the rope 12 to occupy either a position blocking function in the event of a fall, ie an inactive unlocking position in the direction of the climb, or in the opposite direction during a controlled descent.

Le corps 16 de préférence métallique, comporte une goulotte 20 rectiligne en forme de U pour le passage de la corde 12, et un étrier 22 pour le montage d'un premier axe 24 s'étendant transversalement par rapport à la direction de la goulotte 20. La partie supérieure de la goulotte 20 est percée par deux trous 23 pour autoriser le passage du mousqueton 14 d'attache au baudrier.The body 16, which is preferably metallic, comprises a straight trough 20 made of U shape for the passage of the rope 12, and a stirrup 22 for mounting a first axis 24 extending transversely to the direction of the chute 20. The upper part of the chute 20 is pierced by two holes 23 to allow the passage of the carabiner 14 attachment to the harness.

L'organe de retenue 18 comprend un bras support 26 articulé sur le premier axe 24, et un galet 28 en forme de roue montée à rotation libre sur un deuxième axe 30 solidaire du bras support 26. La surface périphérique du galet 28 est cylindrique, et est munie d'une pluralité de picots 32 ayant chacun une inclinaison prédéterminée par rapport à la direction radiale passant par l'axe 30. Un ressort de torsion (non représenté) est enfilé sur le premier axe 24 et sollicite le bras support 26 en direction de la goulotte 20.The retaining member 18 comprises a support arm 26 articulated on the first axis 24, and a wheel-shaped roller 28 mounted for free rotation on a second axis 30 integral with the support arm 26. The peripheral surface of the roller 28 is cylindrical, and is provided with a plurality of pins 32 each having an inclination predetermined with respect to the radial direction passing through the axis 30. A spring torsion (not shown) is threaded on the first axis 24 and urges the arm support 26 in the direction of the chute 20.

Le galet 28 est doté d'un organe d'entraínement 33 interne, percé par un orifice 34 central cylindrique, lequel est traversé par un coussinet 36 tubulaire introduit sur le deuxième axe 30 fixe. A l'intérieur du galet 28 se trouve en plus un accouplement mécanique 38 formé par une paire de masselottes 40 cylindriques agencées entre des rampes 42 opposées de l'organe d'entraínement 33 et un rebord 44 circulaire du bras support 26.The roller 28 is provided with an internal drive member 33, pierced by an orifice 34 central cylindrical, which is traversed by a tubular bearing 36 introduced on the second fixed axis 30. Inside the roller 28 is in addition a mechanical coupling 38 formed by a pair of weights 40 cylindrical arranged between opposite ramps 42 of the organ 33 and a circular flange 44 of the support arm 26.

A chaque masselotte 40 est associé un ressort 46 en forme d'épingle destiné à solliciter l'accouplement mécanique 38 vers la position débrayée lors de l'utilisation normale du dispositif antichute 10. Dans cet état de repos, les masselottes 40 se trouvent dans un creux de l'organe d'entraínement 33, de manière à interrompre l'accouplement mécanique 38 entre le galet 28 et le bras support 26. Le galet 28 est alors entraíné en rotation par la friction de la corde 12, tandis que le bras support 26 est en position inactive permettant au dispositif antichute 10 de suivre la progression de l'utilisateur à la montée ou à la descente.Each weight 40 is associated with a spring 46 in the shape of a pin intended for urging the mechanical coupling 38 to the disengaged position when the normal use of the fall arrest device 10. In this state of rest, the 40 flyweights are in a hollow of the drive member 33, in order to interrupt the mechanical coupling 38 between the roller 28 and the arm 26. The roller 28 is then rotated by the friction of the rope 12, while the support arm 26 is in the inactive position allowing the device fall arrest 10 to follow the progress of the user on the ascent or descent.

La force de rappel des ressorts 46 définit le seuil d'accouplement en fonction de la vitesse ou de l'accélération de l'organe d'entraínement 33 du galet 28 rotatif. En cas de chute, la rotation brusque du galet 28 sur l'axe 30 provoque le déplacement des masselottes 40 par effet centrifuge vers la position embrayée. Ce déplacement s'effectue à l'encontre de la force de rappel des ressorts 46, et engendre un coincement des masselottes 40 entre le rebord 44 et l'organe d'entraínement 33. L'accouplement mécanique en position embrayée rend ainsi le galet 28 solidaire du bras support 26, de manière à constituer un taquet coinceur susceptible de pivoter autour du premier axe 24, et de bloquer la chute par blocage de la corde 12.The restoring force of the springs 46 defines the coupling threshold as a function of the speed or acceleration of the drive member 33 of the rotary roller 28. In the event of a fall, the abrupt rotation of the roller 28 on the axis 30 causes the displacement of the weights 40 by centrifugal effect to the engaged position. This movement is effected against the restoring force of the springs 46, and causes jamming of the weights 40 between the flange 44 and the body 33. The mechanical coupling in the engaged position thus makes the roller 28 secured to the support arm 26, so as to form a cleat wedge capable of pivoting about the first axis 24, and blocking the fall by blocking the rope 12.

Le bras support 26 pivotant est équipé d'une butée 48 destinée à coopérer avec le mousqueton 14 pour limiter la course de pivotement du bras 26 dans la position inactive de déblocage. Le temps de réponse du bras support 26 pivotant est ainsi réduit au minimum pour obtenir le blocage en cas de chute. L'extrémité de la butée 48 est pourvue d'une protubérance 49 destinée à s'intercaler entre les deux trous 23 du corps 16 pour empêcher la mise en place du mousqueton 14 avant l'introduction de la corde 12.The pivoting support arm 26 is equipped with a stop 48 intended to cooperate with the carabiner 14 to limit the pivoting stroke of the arm 26 in the inactive unlock position. The response time of the support arm 26 pivoting is thus reduced to the minimum to obtain the blocking in case of fall. The end of the stop 48 is provided with a protuberance 49 intended for intercalate between the two holes 23 of the body 16 to prevent the establishment carabiner 14 before the introduction of the rope 12.

Le fonctionnement du dispositif antichute 10 selon les figures 1 à 12 est le suivant:

  • Sur les figures 1 à 12, le dispositif antichute 10 est représenté dans la position d'ouverture pour l'installation de la corde 12 dans la goulotte 20. Le système de retenue 18 est écarté au maximum de la goulotte à l'encontre de la force de rappel du ressort de torsion. La corde 12 est accrochée à un point d'ancrage supérieur fixe, par exemple une plaquette ou un piton. La protubérance 49 de la butée 48 obture les deux trous 23, ce qui empêche la mise en place du mousqueton 14 avant l'introduction de la corde 12 dans la goulotte 20.
  • Sur les figures 5 à 7, la position d'utilisation normale du dispositif antichute 10 pour la montée (flèche F1) ou la descente (flèche F2), est obtenue après relâchement du système de retenue 18 et mise en place du mousqueton 14 dans les trous 23. Les picots 32 du galet 28 viennent en contact de la corde 12 sous l'action du ressort de torsion, mais sans provoquer de blocage. Le dispositif antichute 10 suit la progression de la personne le long de la corde 12, l'accouplement mécanique 38 se trouvant en permanence en position débrayée. La personne est libre de se déplacer sans aucune intervention manuelle de déblocage du dispositif antichute 10. Lors de la descente (flèche F2), le galet 28 tourne dans le sens horaire sous l'effet de la friction de la corde 12 sur les picots 32, et les masselottes 40 restent immobilisées en position débrayée sous l'action des ressorts 46. Le freinage contrôlé du galet 28 permet au dispositif antichute 10 d'être positionné au-dessus de l'utilisateur. A la montée (flèche F1), le galet 28 glisse sur la corde 12 grâce au pivotement de l'ensemble bras 26 et galet 28 autour du premier axe 24.
    • The operation of the fall arrest device 10 according to FIGS. 1 to 12 is as follows:
  • In Figures 1 to 12, the fall arrest device 10 is shown in the open position for the installation of the rope 12 in the chute 20. The retaining system 18 is spaced at the maximum of the chute against the return force of the torsion spring. The rope 12 is hooked to a fixed upper anchor point, for example a plate or a stud. The protrusion 49 of the abutment 48 closes the two holes 23, which prevents the introduction of the carabiner 14 before the introduction of the rope 12 into the chute 20.
  • In FIGS. 5 to 7, the normal use position of the fall arrest device 10 for the climb (arrow F1) or the descent (arrow F2), is obtained after releasing the retention system 18 and placing the carabiner 14 in the holes 23. The pins 32 of the roller 28 come into contact with the rope 12 under the action of the torsion spring, but without causing blockage. The fall arrest device 10 tracks the progress of the person along the rope 12, the mechanical coupling 38 being permanently in the disengaged position. The person is free to move without any manual intervention unlocking the fall arrest device 10. During descent (arrow F2), the roller 28 rotates clockwise under the effect of the friction of the rope 12 on the pins 32 and the weights 40 remain immobilized in the disengaged position under the action of the springs 46. The controlled braking of the roller 28 allows the fall arrest device 10 to be positioned above the user. At the rise (arrow F1), the roller 28 slides on the rope 12 by pivoting the arm assembly 26 and roller 28 around the first axis 24.

    • En référence à la figure 10 correspondant à une position de blocage sur chute de l'utilisateur, la rotation brusque du galet et de l'organe d'entraínement 33 dans le sens horaire soumet les masselottes 40 à une force centrifuge, laquelle est supérieure et de sens opposé à la force de rappel des ressorts 46. Les masselottes 40 se déplacent sur les rampes 42, ce qui provoque un coincement des masselottes 40 entre le rebord 44 et l'organe d'entraínement 33. L'accouplement mécanique se trouve alors en position embrayée en rendant le galet 28 solidaire du bras support 26. L'ensemble constitue un taquet coinceur susceptible de pivoter dans le sens horaire autour du premier axe 24, et de bloquer la chute par blocage de la corde 12. Le déblocage des masselottes 40 intervient par une action manuelle de l'opérateur consistant à maintenir le galet 28 contre la corde 12, et en faisant remonter le corps 16 de quelques centimètres.Referring to Figure 10 corresponding to a locking position on a fall of the user, the abrupt rotation of the roller and the drive member 33 in the clockwise subjects the weights 40 to a centrifugal force, which is higher and opposite to the restoring force of the springs 46. The weights 40 move on the ramps 42, which causes jamming weights 40 between the flange 44 and the drive member 33. The mechanical coupling is then in the engaged position, making the roller 28 secured to the support arm 26. The assembly constitutes a jamming cleat rotatable clockwise about the first axis 24, and blocking the fall by blocking the rope 12. Unblocking the weights 40 intervenes by a manual action of the operator to maintain the roller 28 against the rope 12, and by raising the body 16 by a few centimeters.

    Sur la figure 11, on remarque qu'en position d'utilisation normale du dispositif antichute 10, la butée 48 est en appui contre le mousqueton 14 pour limiter la course de pivotement du bras 26 dans la position inactive de déblocage. Le temps de réponse pour le blocage est ainsi réduit en cas de chute.In FIG. 11, it can be seen that in the position of normal use of the device 10, the stop 48 is in abutment against the carabiner 14 to limit the arm pivoting stroke 26 in the inactive unlocking position. The Response time for blocking is thus reduced in case of a fall.

    Selon le développement de l'invention illustré aux figures 13 à 17, la butée 48 est remplacée par un volet de sécurité 50, lequel est agencé pour remplir les mêmes fonctions de la butée 48 des figures 1-12 précédentes, avec en plus une fonction de positionnement de la corde 12 au fond de la goulotte 20 avant l'introduction du mousqueton 14 dans les trous 23.According to the development of the invention illustrated in FIGS. 13 to 17, the stop 48 is replaced by a security flap 50, which is arranged to fill the same functions of the abutment 48 of the preceding Figures 1-12, in addition to a positioning function of the rope 12 at the bottom of the chute 20 before the introduction of the carabiner 14 in the holes 23.

    Le volet de sécurité 50 est monté à pivotement sur un axe 52, et comporte une ouverture 54 oblongue à l'intérieur de laquelle se déplace un levier de commande 56 solidaire du bras support 26. L'ouverture 54 présente une double rampe coudée destinée à déplacer le volet 50 en fonction du mouvement de pivotement du bras 26. Le volet 50 comprend en plus une aile 58 destinée à plaquer la corde 12 au fond de la goulotte 20.The safety flap 50 is pivotally mounted on an axis 52, and comprises a oblong aperture 54 inside which moves a lever of control 56 secured to the support arm 26. The opening 54 has a double angled ramp for moving the flap 50 according to the pivoting movement of the arm 26. The flap 50 further comprises a wing 58 intended to press the rope 12 at the bottom of the chute 20.

    Le fonctionnement du volet de sécurité 50 selon les figures 14 à 17 est le suivant :

  • Sur la figure 14 correspondant à la mise en place de la corde 12, le bras support 26 du dispositif antichute 10 se trouve en position d'ouverture, et le volet 50 piloté par le levier de commande 56, obture l'un des trous 23. Dans cette position, le mousqueton 14 ne peut pas être introduit dans les trous 23, et le passage de la corde 12 dans la goulotte 20 est dégagé.
  • Sur les figures 15 et 16, l'opérateur relâche le bras 26 pivotant après l'introduction de la corde 12 dans la goulotte 20. L'aile 56 du volet 50 vient positionner correctement la corde 12 au fond de la goulotte 20. L'écartement du volet 50 autorise ainsi l'introduction du mousqueton 14 dans les trous 23, et la corde 12 se trouve positionnée entre la goulotte 20 et le mousqueton 14 dans la position normale de fonctionnement.
  • Sur la figure 17 correspondant à la position de blocage du bras 26 suite à une chute, le déplacement du levier 56 dans l'ouverture 54 permet au volet 50 de conserver la même position de la figure16, de manière à ne pas interférer avec la cinématique de blocage.
    • The operation of the safety shutter 50 according to FIGS. 14 to 17 is as follows:
  • In FIG. 14 corresponding to the positioning of the rope 12, the support arm 26 of the fall arrest device 10 is in the open position, and the flap 50 controlled by the control lever 56 closes off one of the holes 23. In this position, the carabiner 14 can not be introduced into the holes 23, and the passage of the rope 12 in the chute 20 is disengaged.
  • In FIGS. 15 and 16, the operator releases the pivoting arm 26 after the introduction of the cord 12 into the chute 20. The flap 56 of the flap 50 correctly positions the cord 12 at the bottom of the chute 20. separation of the flap 50 thus allows the introduction of the carabiner 14 into the holes 23, and the rope 12 is positioned between the chute 20 and the carabiner 14 in the normal operating position.
  • In FIG. 17 corresponding to the blocking position of the arm 26 following a fall, the movement of the lever 56 in the opening 54 allows the flap 50 to maintain the same position of FIG. 16, so as not to interfere with the kinematics blocking.

    • Claims (8)

    Dispositif antichute suiveur utilisé avec une corde fixe (12) de sécurité, et comprenant : un corps (16) équipé d'un système de retenue (18) agencé pour occuper soit une position active de blocage en cas de chute, soit une position inactive de déblocage autorisant la progression de l'utilisateur le long de la corde (12) dans le sens de la montée, ou dans le sens opposé lors d'une descente contrôlée, ledit système de retenue (18) comportant un bras support (26) articulé sur un premier axe (24) du corps (16), un galet (28) en forme de roue cylindrique montée à rotation libre sur un deuxième axe (30) solidaire du bras support (26), et un accouplement mécanique (38) centrifuge agencé entre un organe d'entraínement (33) du galet (28) et le bras support (26) de manière à occuper une position débrayée ou une position embrayée, et des moyens d'attache pour la liaison du corps (16) à un baudrier d'assurance de l'utilisateur,    caractérisé en ce que la surface périphérique du galet (28) est munie d'une pluralité de picots (32) agencés pour engendrer une rotation du galet (28) dans le sens de la descente, et un glissement sur la corde (12) dans le sens de la montée. le corps (16) comporte une goulotte (20) rectiligne en forme de U pour le passage de la corde (12), ladite goulotte ayant des trous (23) pour le passage des moyens d'attache. Tracking fall arrest device used with a fixed rope (12) for safety, and comprising: a body (16) equipped with a retaining system (18) arranged to occupy either an active locking position in the event of a fall, or an inactive unlocking position allowing the user to progress along the rope (12) in the upward direction, or in the opposite direction during a controlled descent, said retaining system (18) comprising a support arm (26) articulated on a first axis (24) of the body (16), a roller ( 28) in the form of a cylindrical wheel mounted for free rotation on a second axis (30) integral with the support arm (26), and a mechanical coupling (38) centrifugal arranged between a drive member (33) of the roller (28) and the support arm (26) so as to occupy a disengaged position or an engaged position, and attachment means for connecting the body (16) to a user's insurance belt, characterized in that the peripheral surface of the roller (28) is provided with a plurality of pins (32) arranged to cause rotation of the roller (28) in the downhill direction, and sliding on the rope (12) in the direction of the climb. the body (16) comprises a U-shaped straight trough (20) for the passage of the rope (12), said trough having holes (23) for the passage of the attachment means. Dispositif antichute selon la revendication 1, caractérisé en ce que l'accouplement mécanique (38) est disposé à l'intérieur du galet (28), et comprend au moins une masselotte (40) mobile par effet centrifuge le long d'une rampe (42) en fonction de la vitesse ou de l'accélération de l'organe d'entraínement (33) du galet (28). Fall arrest device according to claim 1, characterized in that the mechanical coupling (38) is arranged inside the roller (28), and comprises at least one flyweight (40) movable by centrifugal effect along a ramp ( 42) depending on the speed or acceleration of the drive member (33) of the roller (28). Dispositif antichute selon la revendication 2, caractérisé en ce que la masselotte (40) est associée à un ressort de rappel (46) sollicitant l'accouplement mécanique (38) en position débrayée, le seuil d'accouplement étant atteint lorsque la force centrifuge est supérieure à la force de rappel du ressort (46).Fall arrest device according to claim 2, characterized in that the weight (40) is associated with a return spring (46) biasing the mechanical coupling (38) in the disengaged position, the coupling threshold being reached when the centrifugal force is greater than the restoring force of the spring (46). Dispositif antichute selon la revendication 3, caractérisé en ce que la masselotte (40) est de forme cylindrique, et coopère en position embrayée avec un rebord (44) cylindrique du bras support (26).Fall arrest device according to claim 3, characterized in that the weight (40) is of cylindrical shape, and cooperates in the engaged position with a rim (44) of the cylindrical support arm (26). Dispositif antichute selon la revendication 1, caractérisé en ce que les moyens d'attache sont constitués par un mousqueton (14) traversant les trous (23) du corps (16).Fall arrest device according to claim 1, characterized in that the attachment means are constituted by a carabiner (14) passing through the holes (23) of the body (16). Dispositif antichute selon la revendication 1, caractérisé en ce que le bras support (26) est doté de moyens de sécurité (48, 50) destinés à limiter la course de pivotement dudit bras dans la position inactive de déblocage, et à empêcher la mise en place du mousqueton (14) avant l'introduction de la corde (12) dans la goulotte (20).Fall arrest device according to claim 1, characterized in that the support arm (26) is provided with safety means (48, 50) for limiting the pivoting stroke of said arm in the inactive unlocking position, and for preventing the setting place the carabiner (14) before the introduction of the rope (12) into the chute (20). Dispositif antichute selon la revendication 6, caractérisé en ce que les moyens de sécurité comportent une butée (48) solidaire du bras support (26), et ayant une extrémité équipée d'une protubérance (49).Fall arrest device according to claim 6, characterized in that the safety means comprise a stop (48) integral with the support arm (26), and having an end equipped with a protuberance (49). Dispositif antichute selon la revendication 6, caractérisé en ce que les moyens de sécurité comportent un volet (50) monté à pivotement sur un axe (52), et comprenant : une ouverture (54) oblongue à l'intérieur de laquelle se déplace un levier de commande (56) solidaire du bras support (26), et une aile (58) destinée à plaquer la corde (12) au fond de la goulotte (20). Fall arrest device according to claim 6, characterized in that the safety means comprise a flap (50) pivotally mounted on an axis (52), and comprising: an oblong aperture (54) within which a control lever (56) integral with the support arm (26) moves, and a wing (58) for pressing the rope (12) to the bottom of the chute (20).
    EP03354059A 2002-07-12 2003-06-19 Fall protection follower device along a fixed rope Expired - Lifetime EP1380320B1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR0208865A FR2842113B1 (en) 2002-07-12 2002-07-12 FOLLOWING FALL ARRANGEMENT FOR FIXED ROPE
    FR0208865 2002-07-12

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    EP1380320A1 true EP1380320A1 (en) 2004-01-14
    EP1380320B1 EP1380320B1 (en) 2005-05-18

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    US (1) US6793046B2 (en)
    EP (1) EP1380320B1 (en)
    JP (1) JP4242222B2 (en)
    AT (1) ATE295753T1 (en)
    DE (1) DE60300667T2 (en)
    ES (1) ES2242934T3 (en)
    FR (1) FR2842113B1 (en)

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    US5323873A (en) * 1992-03-18 1994-06-28 Societe Anonyme Dite: Komet Safety device
    US6056086A (en) * 1996-07-16 2000-05-02 Tractel, S.A. Device for automatically stopping the fall of personnel working high above ground
    WO2000024471A1 (en) 1998-10-23 2000-05-04 Latchways Plc Two-way locking device for height safety apparatus

    Cited By (16)

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    WO2011050881A1 (en) * 2009-10-30 2011-05-05 Skylotec Gmbh Catching device having a speed-dependent coupling
    CN103328318A (en) * 2011-01-19 2013-09-25 力特亿泽公司 Self-locking clip systems and methods
    US9498660B2 (en) 2013-01-15 2016-11-22 Zedel Fall arrest safety apparatus on a rope with clamping function
    CN103920258B (en) * 2013-01-15 2019-09-10 齐德公司 The falling for clamping function that have on rope prevents safety device
    EP2754466A1 (en) 2013-01-15 2014-07-16 Zedel Fall-arresting safety apparatus on a rope with blocking function
    FR3000900A1 (en) * 2013-01-15 2014-07-18 Zedel SAFETY DEVICE FALLING ON ROPE WITH BLOCKING FUNCTION
    US9192792B2 (en) 2013-01-15 2015-11-24 Zedel Fall arrest safety apparatus with blocking on a rope
    EP2754465A1 (en) 2013-01-15 2014-07-16 Zedel Fall-arresting and rope-blocking safety apparatus
    CN103920258A (en) * 2013-01-15 2014-07-16 齐德公司 Fall Arrest Safety Apparatus On Rope With Clamping Function
    CN105073204A (en) * 2013-02-22 2015-11-18 凯比特安全设备集团（北欧）有限公司 Fall arrest device
    CN107191515A (en) * 2017-05-19 2017-09-22 中建八局第二建设有限公司 A kind of centrifugal hanging hook overspeed control device
    FR3095952A1 (en) 2019-05-14 2020-11-20 Zedel WIRED ELEMENT STRAND ENERGY ABSORBER DEVICE
    CN111706061A (en) * 2020-05-26 2020-09-25 深圳市特辰科技股份有限公司 Anti-falling climbing frame for centrifugal rotating wheel
    CN112827088A (en) * 2020-12-31 2021-05-25 贵州电网有限责任公司 Side joint formula climbing device
    FR3139725A1 (en) * 2022-09-19 2024-03-22 Zedel DEVICE FOR DETECTING A THRESHOLD SPEED OF A BLOCKING DEVICE, BLOCKING DEVICE AND METHOD FOR BLOCKING A WIRED ELEMENT
    CN115738111A (en) * 2022-12-09 2023-03-07 李国栋 Automatic slowly-descending rock climbing protection device

    Also Published As

    Publication number Publication date
    JP4242222B2 (en) 2009-03-25
    FR2842113A1 (en) 2004-01-16
    EP1380320B1 (en) 2005-05-18
    JP2004144292A (en) 2004-05-20
    US20040020727A1 (en) 2004-02-05
    DE60300667D1 (en) 2005-06-23
    ES2242934T3 (en) 2005-11-16
    DE60300667T2 (en) 2006-04-27
    US6793046B2 (en) 2004-09-21
    FR2842113B1 (en) 2004-09-24
    ATE295753T1 (en) 2005-06-15

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