EP2754466B1 - Fall-arresting safety apparatus on a rope with blocking function - Google Patents

Fall-arresting safety apparatus on a rope with blocking function Download PDF

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Publication number
EP2754466B1
EP2754466B1 EP13354046.8A EP13354046A EP2754466B1 EP 2754466 B1 EP2754466 B1 EP 2754466B1 EP 13354046 A EP13354046 A EP 13354046A EP 2754466 B1 EP2754466 B1 EP 2754466B1
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EP
European Patent Office
Prior art keywords
roller
rope
safety apparatus
fall
rotation
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EP13354046.8A
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German (de)
French (fr)
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EP2754466A1 (en
Inventor
Julien Moine
Michael Chaumontet
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Zedel SAS
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Zedel SAS
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Publication of EP2754466A1 publication Critical patent/EP2754466A1/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
    • A62B35/0081—Equipment which can travel along the length of a lifeline, e.g. travelers
    • 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
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B29/00—Apparatus for mountaineering
    • A63B29/02—Mountain guy-ropes or accessories, e.g. avalanche ropes; Means for indicating the location of accidentally buried, e.g. snow-buried, persons

Definitions

  • known fall arrest devices track the person's progress along the rope without causing blockage. The person is free to move without any manual intervention to unblock the fall arrest device. The blocking on the rope intervenes only in case of fall.
  • a fall arrest device with a rotating roller is described in the documents EP 1525903 and EP 1380320 .
  • the restraint system includes an articulated support arm, and a roller mounted freely rotatable on the arm.
  • a centrifugal coupling is arranged inside the roller, between a drive member of the roller and the support arm so as to occupy a disengaged position or an engaged position depending on the speed of rotation of the roller.
  • the peripheral surface of the roller is provided with a plurality of pins, whose inclination is arranged to generate a rotation of the roller in the direction of the descent, and a sliding on the rope in the direction of the rise.
  • the centrifugal coupling is in the disengaged state during normal use of ascent or descent. Locking occurs automatically in case of a fall, following the passage of the centrifugal coupling in the engaged state.
  • Such a device operates exclusively as a fall protection device.
  • a fall arrest device known under the name STICK RUN comprises a simple cam with a return spring to stop the fall.
  • An auxiliary lever can be operated to add extra force to the cam to lock the rope.
  • ROCKER device is a cam fall arrester, whose trigger sensitivity is controlled by a torsion spring. An actuating member can be rotated to add additional stress to the spring promoting locking.
  • the object of the invention is to provide a rotational roller bearing safety device with speed detection, also having an independent blocking function.
  • the security device is characterized in that it comprises a control selector of a pawl adapted to occupy an inactive unlocking position allowing the roller to rotate in both directions of rotation in a first mode. operating in fall arrest, and an active position of unidirectional locking in rotation of the roller relative to said arm in the direction of the descent, corresponding to a second mode of operation of the apparatus as a single blocker.
  • the presence of the selector allows the user to choose the operating mode of the rope safety device, either in fall arrest, or in blocker for self-insurance during the climb.
  • the pawl is pivotally mounted about an axis, and has at one end an abutment engageable in the locking position in at least one notch of the roller.
  • the notch is shaped to allow in the locking position of the pawl, the free rotation of the roller in the direction of the rise.
  • a compression spring acts on the other end of the pawl to maintain it stably in each of the active and inactive positions.
  • the selector knob is advantageously associated with a transmission member cooperating with a wedge forming a hard point when the button is in an intermediate position.
  • a fall arrest apparatus 10 is used for the safety of a person moving along a fixed insurance rope 11.
  • the fall arrest device 10 is connected to the harness, and follows the progression of the person without causing a blockage during the normal use of climb or downhill. The person is then free to move without any manual intervention of unlocking the fall arrest device 10.
  • the fall arrest device 10 comprises a rigid body 12, preferably a metal body, having on one side a rectilinear channel 13 of U section for the passage of the rope 11, and on the other side a stirrup 14 for mounting a retaining system 15 to 16 rotatable roller.
  • the retaining system 15 with a roller 16 blocker is capable of occupying either an active blocking position in the event of a fall, or an inactive unlocking position allowing the person to progress along the rope 11 in the upward direction or in the opposite direction during a controlled descent.
  • the roller 16 in the form of a cylindrical wheel, is carried by a pivoting double arm support device 17 hinged about a first axis 18 of the body 12.
  • the peripheral surface of the roller 16 is provided with inclined pins.
  • a torsion spring (not shown) is threaded on the first axis 18 to urge the roller 16 in contact with the rope 11 inside the chute 13.
  • the roller 16 is mounted to rotate freely on a second axis 19 of the arms 17 supports, and the inside of the roller 16 contains a centrifugal coupling (not shown) for occupying a disengaged position or a position engaged according to the speed or acceleration of the roller 16 blocker.
  • the body 12 further comprises a rocker 20 in the shape of an inverted U mounted to tilt around a third axis 21 by straddling the stirrup 14.
  • the rocker 20 is intended to be connected to the user's shoulder belt, either directly by a connecting lanyard, either via a shock absorber.
  • the fall arrest apparatus 10 is equipped according to the invention with a selector 23 making it possible to choose two modes of operation, either the speed-detecting fall-prevention function described above or a blocking function.
  • the selector 23 is formed by a button protruding from a rectangular opening 24 formed in one of the arms 17, said selector being able to be displaced in translation between two stable positions, one raised ( figure 2 ) corresponding to the fall arrest mode, and the other lowered ( figure 3 ) relating to the blocking mode.
  • the selector 23 is provided with a transmission member 25 for cooperating with a pawl 26, which is mounted to pivot limited around a fourth axis 27 between two stable angular positions.
  • the periphery of the roller 16 is provided with a plurality of notches 28 spaced at regular angular intervals on the two annular edges opposed.
  • the pawl 26 comprises at one end, an abutment 30 U-shaped inverted, and adapted to engage in two notches 28 opposite the roller 16 to block the rotation of the latter in the direction of descent. Due to the mounting of the roller 16 on the pivoting arms 17, the rotation of the roller 16 is blocked with respect to the arms 17.
  • the notches 28, for example six in number on each side, are shaped to allow free rotation of the roller 16 in the upward direction.
  • a compression spring 29 acts continuously on the other end of the pawl 26.
  • the transmission member 25 passes through the wedge 31 of the hard point by slightly turning the selector knob 23 to the intermediate position of the figure 6 .
  • the pawl 26 pivots counterclockwise, and releases the stop 30 from the notches 28.
  • the device In the raised position of the button, the device is in fall arrest mode ( figures 5 and 8 ).
  • the stop 30 of the pawl 26 is in the inactive position of unblocking of the roller 16, which can rotate freely in both directions of rotation, on the one hand during the climb, and on the other hand during the descent if the coupling Centrifugal is in the disengaged state.
  • the inactive position of the pawl 26 is also stable after crossing the hard point, and the transmission member 25 is wedged between the wedge 31 and the pawl 26.
  • the spring 29 participates in maintaining the pawl 26 in this position.
  • the presence of the selector 23 allows the user to choose the operating mode of the rope safety device, either in fall arrest, or as a blocker for self-insurance during the climb.
  • the other blocking function is deactivated.
  • the other fall arrest function is deactivated.

Description

Domaine technique de l'inventionTechnical field of the invention

L'invention concerne un appareil de sécurité anti-chute sur corde, comprenant :

  • un corps rigide pourvu d'une goulotte de logement de la corde,
  • un système de retenue à galet rotatif avec détection de la vitesse de rotation, ledit galet étant monté sur un bras mobile pouvant être déplacé entre une position de blocage de la corde en cas de chute, ou une position de déblocage.
The invention relates to a rope fall safety apparatus, comprising:
  • a rigid body provided with a chute housing the rope,
  • a rotatable roller retainer system with rotational speed detection, said roller being mounted on a movable arm movable between a locking position of the rope in the event of a fall, or an unlocking position.

Etat de la techniqueState of the art

Lors de l'utilisation normale de montée ou de descente, les dispositifs de sécurité antichute connus 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 sur la corde intervient uniquement en cas de chute.During normal climb or descent use, known fall arrest devices track the person's progress along the rope without causing blockage. The person is free to move without any manual intervention to unblock the fall arrest device. The blocking on the rope intervenes only in case of fall.

Un dispositif antichute à galet rotatif est décrit dans les documents EP 1525903 et EP 1380320 . Le système de retenue comporte un bras support articulé, et un galet monté à rotation libre sur le bras. Un accouplement centrifuge est agencé à l'intérieur du galet, entre un organe d'entraînement du galet et le bras support de manière à occuper une position débrayée ou une position embrayée en fonction de la vitesse de rotation du galet. La surface périphérique du galet est munie d'une pluralité de picots, dont l'inclinaison est agencée pour engendrer une rotation du galet dans le sens de la descente, et un glissement sur la corde dans le sens de la montée. L'accouplement centrifuge est dans l'état débrayé lors d'une utilisation normale de montée ou de descente. Le blocage intervient automatiquement en cas de chute, suite au passage de l'accouplement centrifuge dans l'état embrayé. Un tel dispositif fonctionne exclusivement en appareil de sécurité antichute.A fall arrest device with a rotating roller is described in the documents EP 1525903 and EP 1380320 . The restraint system includes an articulated support arm, and a roller mounted freely rotatable on the arm. A centrifugal coupling is arranged inside the roller, between a drive member of the roller and the support arm so as to occupy a disengaged position or an engaged position depending on the speed of rotation of the roller. The peripheral surface of the roller is provided with a plurality of pins, whose inclination is arranged to generate a rotation of the roller in the direction of the descent, and a sliding on the rope in the direction of the rise. The centrifugal coupling is in the disengaged state during normal use of ascent or descent. Locking occurs automatically in case of a fall, following the passage of the centrifugal coupling in the engaged state. Such a device operates exclusively as a fall protection device.

En autoassurage à la montée, les utilisateurs ont l'habitude d'utiliser en plus un appareil bloqueur fonctionnant en taquet coinceur. Il comporte généralement une came pivotante qui vient coincer la corde sous l'effet du poids. Ce type de bloqueur décrit dans le document FR 2 005 895 , sert pour la remontée le long d'une corde.In self-insurance at the climb, users are used to use in addition a blocking device operating in cleat. It usually has a pivoting cam that jams the rope under the effect of weight. This type of blocker described in the document FR 2,005,895 , serves for the ascent along a rope.

Pour les travaux en hauteurs, et en spéléologie, il est ainsi nécessaire de disposer deux appareils par utilisateur.For work at heights, and caving, it is thus necessary to have two devices per user.

Un appareil antichute connu sous le dénomination STICK RUN, comporte une simple came avec un ressort de rappel pour stopper la chute. Un levier auxiliaire peut être actionné pour ajouter un effort supplémentaire sur la came pour bloquer la corde.A fall arrest device known under the name STICK RUN, comprises a simple cam with a return spring to stop the fall. An auxiliary lever can be operated to add extra force to the cam to lock the rope.

Un autre appareil ROCKER concerne un antichute à came, dont la sensibilité de déclenchement est géré par un ressort de torsion. Une pièce d'actionnement peut être tournée pour ajouter une contrainte supplémentaire au ressort favorisant le blocage.Another ROCKER device is a cam fall arrester, whose trigger sensitivity is controlled by a torsion spring. An actuating member can be rotated to add additional stress to the spring promoting locking.

Objet de l'inventionObject of the invention

Le but de l'invention consiste à réaliser un appareil de sécurité antichute à galet rotatif avec détection de la vitesse, ayant de plus une fonction bloqueur indépendante.The object of the invention is to provide a rotational roller bearing safety device with speed detection, also having an independent blocking function.

L'appareil de sécurité selon l'invention est caractérisé en ce qu'il comporte un sélecteur de commande d'un cliquet apte à occuper une position inactive de déverrouillage autorisant le galet à tourner dans les deux sens de rotation lors d'un premier mode de fonctionnement en antichute, et une position active de verrouillage unidirectionnel en rotation du galet par rapport audit bras dans le sens de la descente, correspondant à un deuxième mode de fonctionnement de l'appareil en simple bloqueur.The security device according to the invention is characterized in that it comprises a control selector of a pawl adapted to occupy an inactive unlocking position allowing the roller to rotate in both directions of rotation in a first mode. operating in fall arrest, and an active position of unidirectional locking in rotation of the roller relative to said arm in the direction of the descent, corresponding to a second mode of operation of the apparatus as a single blocker.

La présence du sélecteur permet à l'utilisateur de choisir le mode de fonctionnement de l'appareil de sécurité sur corde, soit en antichute, soit en bloqueur pour l'autoassurance lors de la montée.The presence of the selector allows the user to choose the operating mode of the rope safety device, either in fall arrest, or in blocker for self-insurance during the climb.

Selon un mode de réalisation préférentiel, le cliquet est monté à pivotement autour d'un axe, et comporte à l'une des extrémités une butée susceptible de s'engager en position de verrouillage dans au moins une encoche du galet. L'encoche est conformée pour autoriser en position de verrouillage du cliquet, la libre rotation du galet dans le sens de la montée.According to a preferred embodiment, the pawl is pivotally mounted about an axis, and has at one end an abutment engageable in the locking position in at least one notch of the roller. The notch is shaped to allow in the locking position of the pawl, the free rotation of the roller in the direction of the rise.

Selon une caractéristique de l'invention, un ressort de compression agit sur l'autre extrémité du cliquet pour le maintenir de manière stable dans chacune des positions active et inactive.According to one characteristic of the invention, a compression spring acts on the other end of the pawl to maintain it stably in each of the active and inactive positions.

Le bouton du sélecteur est associé avantageusement à un organe de transmission coopérant avec un coin formant un point dur lorsque le bouton se trouve dans une position intermédiaire.The selector knob is advantageously associated with a transmission member cooperating with a wedge forming a hard point when the button is in an intermediate position.

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 d'un appareil de sécurité antichute équipé du sélecteur selon l'invention ;
  • les figures 2 et 3 montrent des vues en perspective du système de retenue à galet de la figure 1, respectivement en mode antichute et en mode bloqueur ;
  • la figure 4 représente une vue en coupe verticale du dispositif de retenue de la figure 3, avec le sélecteur en position abaissée correspondant au mode bloqueur ;
  • la figure 5 représente une vue en coupe verticale du dispositif de retenue de la figure 2, avec le sélecteur en position relevée correspondant au mode antichute ;
  • la figure 6 est une vue identique de la figure 4, dans une position intermédiaire du sélecteur ;
  • les figures 7 et 8 sont des vues en coupe respectives selon les lignes 7-7 et 8-8 des figures 4 et 5.
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 accompanying drawings, in which:
  • the figure 1 is a perspective view of a fall arrest safety device equipped with the selector according to the invention;
  • the Figures 2 and 3 show perspective views of the roller retainer system of the figure 1 , respectively in fall arrest mode and in blocking mode;
  • the figure 4 represents a vertical sectional view of the retaining device of the figure 3 , with the selector in the down position corresponding to the blocking mode;
  • the figure 5 represents a vertical sectional view of the retaining device of the figure 2 , with the selector in the up position corresponding to the fall arrest mode;
  • the figure 6 is an identical view of the figure 4 in an intermediate position of the selector;
  • the Figures 7 and 8 are respective sectional views along lines 7-7 and 8-8 of Figures 4 and 5 .

Description d'un mode particulier de réalisationDescription of a particular embodiment

En référence aux figures 1 à 3, un appareil anti-chute 10 est utilisé pour la sécurité d'une personne se déplaçant le long d'une corde 11 fixe d'assurance. L'appareil anti-chute 10 est relié au harnais, et suit la progression de la personne sans engendrer de blocage lors de l'utilisation normale de montée ou de descente. La personne est alors libre de se déplacer sans aucune intervention manuelle de déblocage de l'appareil anti-chute 10.With reference to Figures 1 to 3 , a fall arrest apparatus 10 is used for the safety of a person moving along a fixed insurance rope 11. The fall arrest device 10 is connected to the harness, and follows the progression of the person without causing a blockage during the normal use of climb or downhill. The person is then free to move without any manual intervention of unlocking the fall arrest device 10.

L'appareil anti-chute 10 comporte un corps 12 rigide, de préférence métallique, ayant d'un côté, une goulotte 13 rectiligne de section en U pour le passage de la corde 11, et de l'autre côté, un étrier 14 pour le montage d'un système de retenue 15 à galet 16 rotatif.The fall arrest device 10 comprises a rigid body 12, preferably a metal body, having on one side a rectilinear channel 13 of U section for the passage of the rope 11, and on the other side a stirrup 14 for mounting a retaining system 15 to 16 rotatable roller.

Le système de retenue 15 à galet 16 bloqueur est apte à occuper soit une position active de blocage en cas de chute, soit une position inactive de déblocage autorisant la progression de la personne le long de la corde 11 dans le sens de la montée ou dans le sens opposé lors d'une descente contrôlée. Le galet 16 en forme de roue cylindrique, est porté par un dispositif support à double bras 17 pivotant articulé autour d'un premier axe 18 du corps 12. La surface périphérique du galet 16 est munie de picots inclinés. Un ressort de torsion (non représenté) est enfilé sur le premier axe 18 pour solliciter le galet 16 au contact de la corde 11 à l'intérieur de la goulotte 13. Le galet 16 est monté à rotation libre sur un deuxième axe 19 des bras 17 supports, et l'intérieur du galet 16 renferme un accouplement centrifuge (non représenté) destiné à occuper une position débrayée ou une position embrayé en fonction de la vitesse ou de l'accélération du galet 16 bloqueur.The retaining system 15 with a roller 16 blocker is capable of occupying either an active blocking position in the event of a fall, or an inactive unlocking position allowing the person to progress along the rope 11 in the upward direction or in the opposite direction during a controlled descent. The roller 16 in the form of a cylindrical wheel, is carried by a pivoting double arm support device 17 hinged about a first axis 18 of the body 12. The peripheral surface of the roller 16 is provided with inclined pins. A torsion spring (not shown) is threaded on the first axis 18 to urge the roller 16 in contact with the rope 11 inside the chute 13. The roller 16 is mounted to rotate freely on a second axis 19 of the arms 17 supports, and the inside of the roller 16 contains a centrifugal coupling (not shown) for occupying a disengaged position or a position engaged according to the speed or acceleration of the roller 16 blocker.

Lors de l'utilisation normale de montée ou de descente, l'accouplement centrifuge se trouve en position débrayée, et le galet 16 suit la progression de la personne sans intervention manuelle de déblocage du système de retenue 15. En cas de chute, le blocage intervient automatiquement après passage de l'accouplement centrifuge vers la position embrayée, entraînant le pivotement des bras support 17 avec une forte pression du galet 16 contre la corde 11. Cette dernière est pressée contre le fond de la goulotte 13 de manière à stopper la chute. Le fonctionnement d'un tel système de retenue à détection de la vitesse au moyen d'un accouplement centrifuge, est décrit à titre d'exemples dans les documents EP 1525903 et EP 1380320 .During normal use of ascent or descent, the centrifugal coupling is in the disengaged position, and the roller 16 follows the progression of the person without manual intervention to release the restraint system 15. In the event of a fall, the locking occurs automatically after passing the centrifugal coupling to the engaged position, causing pivoting of the support arms 17 with a high pressure of the roller 16 against the rope 11. The latter is pressed against the bottom of the chute 13 so as to stop the fall. The operation of such a speed-detecting retaining system by means of a centrifugal coupling is described by way of example in the documents EP 1525903 and EP 1380320 .

Le corps 12 comporte de plus un balancier 20 en forme de U renversé monté à basculement autour d'un troisième axe 21 en enfourchant l'étrier 14. Le balancier 20 est destiné à être relié au baudrier de l'utilisateur, soit directement par une longe de liaison, soit par l'intermédiaire d'un amortisseur de choc.The body 12 further comprises a rocker 20 in the shape of an inverted U mounted to tilt around a third axis 21 by straddling the stirrup 14. The rocker 20 is intended to be connected to the user's shoulder belt, either directly by a connecting lanyard, either via a shock absorber.

Pour l'installation de la corde 11 dans la goulotte 13, il suffit d'écarter au maximum le système de retenue 15 à galet 16 hors de la goulotte 13 en faisant pivoter l'ensemble bras 17 et galet 16 dans le sens inverse des aiguilles d'une montre, et à l'encontre de la force de rappel du ressort de torsion. Une paire de taquets 22 articulés aux bras 17 permet d'effectuer cette manoeuvre.For the installation of the rope 11 in the chute 13, it is sufficient to move the roller retainer 15 away from the chute 13 by pivoting the arm assembly 17 and the roller 16 counterclockwise. of a watch, and against the restoring force of the torsion spring. A pair of tabs 22 articulated to the arms 17 allows this maneuver.

L'appareil antichute 10 à galet est équipé selon l'invention d'un sélecteur 23 permettant de choisir deux modes de fonctionnement, soit la fonction antichute à détection de vitesse décrite précédemment, soit une fonction bloqueur. Le sélecteur 23 est formé par un bouton faisant saillie d'une ouverture 24 rectangulaire ménagée dans l'un des bras 17, ledit sélecteur pouvant être déplacé en translation entre deux positions stables, l'une relevée (figure 2) correspondant au mode antichute, et l'autre abaissée (figure 3) relative au mode bloqueur.The fall arrest apparatus 10 is equipped according to the invention with a selector 23 making it possible to choose two modes of operation, either the speed-detecting fall-prevention function described above or a blocking function. The selector 23 is formed by a button protruding from a rectangular opening 24 formed in one of the arms 17, said selector being able to be displaced in translation between two stable positions, one raised ( figure 2 ) corresponding to the fall arrest mode, and the other lowered ( figure 3 ) relating to the blocking mode.

En référence aux figures 4 à 8, le sélecteur 23 est doté d'un organe de transmission 25 destiné à coopérer avec un cliquet 26, lequel est monté à pivotement limité autour d'un quatrième axe 27 entre deux positions angulaires stables. La périphérie du galet 16 est pourvue d'une pluralité d'encoches 28 échelonnées à intervalles angulaires réguliers sur les deux chants annulaires opposés. Le cliquet 26 comporte à l'une des extrémités, une butée 30 en forme de U renversé, et apte à s'engager dans deux encoches 28 opposées du galet 16 pour bloquer la rotation de ce dernier dans le sens de la descente. Du fait du montage du galet 16 sur les bras 17 pivotants, on bloque la rotation du galet 16 par rapport aux bras 17.With reference to Figures 4 to 8 , the selector 23 is provided with a transmission member 25 for cooperating with a pawl 26, which is mounted to pivot limited around a fourth axis 27 between two stable angular positions. The periphery of the roller 16 is provided with a plurality of notches 28 spaced at regular angular intervals on the two annular edges opposed. The pawl 26 comprises at one end, an abutment 30 U-shaped inverted, and adapted to engage in two notches 28 opposite the roller 16 to block the rotation of the latter in the direction of descent. Due to the mounting of the roller 16 on the pivoting arms 17, the rotation of the roller 16 is blocked with respect to the arms 17.

Les encoches 28, par exemple au nombre de six de chaque côté, sont conformées pour autoriser la libre rotation du galet 16 dans le sens de la montée. Un ressort 29 de compression agit en permanence sur l'autre extrémité du cliquet 26.The notches 28, for example six in number on each side, are shaped to allow free rotation of the roller 16 in the upward direction. A compression spring 29 acts continuously on the other end of the pawl 26.

La réaction du ressort 29 sur le cliquet 26 permet de ne pas être hyperstatique lors du passage en mode bloqueur (figure 4), alors que la butée 30 en U du cliquet 26 n'est pas en face des encoches 28 du galet 16. Le cliquet 26 est alors en appui sur l'extérieur du galet 16, jusqu'à ce que le galet 16 tourne suffisamment permettant à la butée 30 du cliquet 26 de tomber dans les encoches 28.The reaction of the spring 29 on the pawl 26 makes it possible not to be hyperstatic when going into blocking mode ( figure 4 ), while the U-stop 30 of the pawl 26 is not opposite the notches 28 of the roller 16. The pawl 26 is then resting on the outside of the roller 16, until the roller 16 rotates sufficiently allowing the stop 30 of the pawl 26 to fall into the notches 28.

Le fonctionnement de l'appareil de sécurité 10 antichute avec fonction bloqueur, est le suivant :

  • Les figures 4 et 7 montrent l'appareil en mode bloqueur. Le bouton du sélecteur 23 est en position abaissée, et le cliquet 26 se trouve en position active d'engagement de la butée 30 dans deux encoches 28 du galet 16. La rotation de ce dernier par rapport aux bras 17, est alors inhibée dans le sens de la descente, mais autorisée dans le sens de la montée. Cette position active du cliquet 26 est stable en mode bloqueur, grâce à la pression exercée par le ressort 29 de compression, et à l'appui de l'organe de transmission 25 et du cliquet 26 sur deux faces inclinées d'un coin 31 formant un point dur fixe situé sur le bras 17 avant.
The operation of the safety device 10 with fall arrest function, is as follows:
  • The figures 4 and 7 show the device in blocking mode. The button of the selector 23 is in the lowered position, and the pawl 26 is in the active position of engagement of the stop 30 in two notches 28 of the roller 16. The rotation of the latter with respect to the arms 17, is then inhibited in the direction of the descent, but allowed in the direction of the ascent. This active position of the pawl 26 is stable in blocking mode, thanks to the pressure exerted by the compression spring 29, and in support of the transmission member 25 and the ratchet 26 on two inclined faces of a wedge 31 forming a fixed hard point located on the front arm 17.

Lors du déplacement du bouton du sélecteur 23 vers la position relevée pour le passage en mode antichute, l'organe de transmission 25 franchit le coin 31 du point dur en faisant légèrement pivoter le bouton du sélecteur 23 dans la position intermédiaire de la figure 6. Le cliquet 26 pivote dans le sens inverse des aiguilles d'une montre, et dégage la butée 30 des encoches 28.When the selector knob 23 is moved to the raised position for the passage into fall arrest mode, the transmission member 25 passes through the wedge 31 of the hard point by slightly turning the selector knob 23 to the intermediate position of the figure 6 . The pawl 26 pivots counterclockwise, and releases the stop 30 from the notches 28.

Dans la position relevée du bouton, l'appareil est en mode antichute (figures 5 et 8). La butée 30 du cliquet 26 se trouve en position inactive de déblocage du galet 16, lequel peut tourner librement dans les deux sens de rotation, d'une part lors de la montée, et d'autre part lors de la descente si l'accouplement centrifuge est dans l'état débrayé. La position inactive du cliquet 26 est également stable après franchissement du point dur, et l'organe de transmission 25 se trouve coincé entre le coin 31 et le cliquet 26. Le ressort 29 participe au maintien du cliquet 26 dans cette position.In the raised position of the button, the device is in fall arrest mode ( figures 5 and 8 ). The stop 30 of the pawl 26 is in the inactive position of unblocking of the roller 16, which can rotate freely in both directions of rotation, on the one hand during the climb, and on the other hand during the descent if the coupling Centrifugal is in the disengaged state. The inactive position of the pawl 26 is also stable after crossing the hard point, and the transmission member 25 is wedged between the wedge 31 and the pawl 26. The spring 29 participates in maintaining the pawl 26 in this position.

La présence du sélecteur 23 permet à l'utilisateur de choisir le mode de fonctionnement de l'appareil de sécurité sur corde, soit en antichute, soit en bloqueur pour l'autoassurance lors de la montée. Dans la fonction antichute, l'autre fonction bloqueur est désactivée. Inversement, dans la fonction bloqueur, l'autre fonction antichute est désactivée.The presence of the selector 23 allows the user to choose the operating mode of the rope safety device, either in fall arrest, or as a blocker for self-insurance during the climb. In the fall arrest function, the other blocking function is deactivated. Conversely, in the blocking function, the other fall arrest function is deactivated.

Claims (6)

  1. A fall arrest safety apparatus (10) on a rope, comprising:
    - a rigid body (12) provided with a trunking (13) for housing the rope (11),
    - a securing system (15) with a rotary roller (16) with detection of the speed of rotation, said roller being fitted on a mobile arm (17) able to be moved between a blocking position of the rope in the event of a fall and a released position,
    characterized in that it comprises a control selector (23) of a ratchet (26) able to occupy an inactive releasing position enabling the roller (16) to rotate in both directions of rotation in a first fall arrest operating mode, and an active position with unidirectional blocking of the roller (16) in rotation with respect to said arm (17) in the descending direction, corresponding to a second operating mode of the apparatus as a simple ascender.
  2. The safety apparatus according to claim 1, characterized in that the ratchet (26) is mounted swivelling around a pivot-pin (27) integral to said arm (17) and comprises a stop (30), at one of its ends, designed to engage in at least one notch (28) of the roller (16) in the blocking position.
  3. The safety apparatus according to claim 2, characterized in that a compression spring (29) acts on the other end of the ratchet (26) to secure it in stable manner in each of the active and inactive positions.
  4. The safety apparatus according to claim 2 or 3, characterized in that the selector (23) comprises a button salient from an opening (24) arranged in one of the arms (17), said button being able to be moved in translation between two positions respectively corresponding to fall arrest mode and to ascender mode.
  5. The safety apparatus according to claim 4, characterized in that the button of the selector (23) is associated with transmission means (25) collaborating with a wedge (31) forming a hang-up point when the button is in an intermediate position.
  6. The safety apparatus according to claim 2, characterized in that each notch (28) is shaped to enable free rotation of the roller (16) in the ascending direction in the blocked position of the ratchet (26).
EP13354046.8A 2013-01-15 2013-12-20 Fall-arresting safety apparatus on a rope with blocking function Active EP2754466B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1300076A FR3000900B1 (en) 2013-01-15 2013-01-15 SAFETY DEVICE FALLING ON ROPE WITH BLOCKING FUNCTION

Publications (2)

Publication Number Publication Date
EP2754466A1 EP2754466A1 (en) 2014-07-16
EP2754466B1 true EP2754466B1 (en) 2015-09-23

Family

ID=48468437

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13354046.8A Active EP2754466B1 (en) 2013-01-15 2013-12-20 Fall-arresting safety apparatus on a rope with blocking function

Country Status (5)

Country Link
US (1) US9498660B2 (en)
EP (1) EP2754466B1 (en)
CN (1) CN103920258B (en)
FR (1) FR3000900B1 (en)
TW (1) TWI630941B (en)

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Also Published As

Publication number Publication date
TW201440840A (en) 2014-11-01
CN103920258A (en) 2014-07-16
FR3000900A1 (en) 2014-07-18
US20140196985A1 (en) 2014-07-17
TWI630941B (en) 2018-08-01
FR3000900B1 (en) 2015-02-27
EP2754466A1 (en) 2014-07-16
CN103920258B (en) 2019-09-10
US9498660B2 (en) 2016-11-22

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