EP2640472A1 - Fall-arrester safety device - Google Patents

Fall-arrester safety device

Info

Publication number
EP2640472A1
EP2640472A1 EP11794810.9A EP11794810A EP2640472A1 EP 2640472 A1 EP2640472 A1 EP 2640472A1 EP 11794810 A EP11794810 A EP 11794810A EP 2640472 A1 EP2640472 A1 EP 2640472A1
Authority
EP
European Patent Office
Prior art keywords
pulley
rope
front flange
safety device
yoke
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.)
Withdrawn
Application number
EP11794810.9A
Other languages
German (de)
French (fr)
Inventor
Marcel José Peltier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP2640472A1 publication Critical patent/EP2640472A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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

Definitions

  • the invention relates to a fall arrest safety device for a person roped by means of a rope passing through the groove of a pulley, comprising a centrifugal braking system housed in a yoke and driven by the pulley.
  • the rope is put in place before closing the screed.
  • the replacement of the rope without opening the yoke is difficult and sometimes impossible, when, for example, the rope has a loop at each end to attach a harness.
  • the centrifugal braking system causes a heating that affects the entire content of the yoke and in particular the pulley driven by the rope.
  • An object of the invention is to provide a fall arrest safety device which does not have these disadvantages, which allows the reattachment of the rope in a simple and fast way, which causes the early operation of the braking system in case of a fall, and which ensures a good dissipation of the heat.
  • the invention relates to a fall arrest safety device, for a person roped by means of a rope passing through the groove of a pulley, comprising a centrifugal braking system housed in a yoke and driven by the pulley, characterized in that the pulley is located outside the yoke and able to receive the rope in a loop.
  • the yoke comprises two parallel metal flanges, a front flange and a rear flange, the pulley being disposed in front of the front flange.
  • two rope guiding means are disposed under said pulley, and sufficiently spaced so that the rope, presented in a loop, is insertable between said two guide means.
  • said guide means are mounted on an articulated arm on the front flange.
  • the front flange carries an articulated flap, adapted to be secured to said arm to ensure the maintenance of said arm in the operating position, and the protection of the pulley.
  • two secondary pulleys are arranged symmetrically above said pulley, to receive the rope before said pulley.
  • each of the secondary pulleys is mounted on an eccentric pivot and biased towards the other secondary pulley by a spring.
  • said pulley comprises two fixed cheeks with respect to the yoke, a rotating outer ring driven by the rope, said ring having an internal toothing, a central gear driving the centrifugal braking system, and between the outer ring and the central gear, planet gears fixed axis relative to said cheeks, meshing with both the outer ring and the central gear.
  • the pulley has a groove for receiving the rope, said groove being provided with a notch.
  • FIG. 1 is a front view of a first embodiment of a security device according to the invention, before the introduction of the rope,
  • FIG. 2 is a front view of a second embodiment of a security device according to the invention after the introduction of the rope
  • FIG. 2 is a right view of the security apparatus of FIG. 2
  • FIG. 4 is a schematic view of an exemplary embodiment of the central pulley
  • - fig. 5 is a radial sectional view of the groove of the central pulley receiving the rope.
  • FIG. 6 is a front view of a third embodiment of a security device according to the invention.
  • the fall protection apparatus 1 comprises a yoke consisting of two parallel flanges, a front flange 3 and a rear flange 3 ', and a casing 12 (FIG 3) containing the centrifugal braking system.
  • This braking system is of the conventional type, notched hub, with two annular sector masses connected by springs, and friction linings against a fixed outer drum in the yoke.
  • the flanges 3 and 3 ' are preferably aluminum to act as a radiator because the friction of the linings on the drum causes a heating that should be dissipated.
  • Anchor rings 2 are arranged between the flanges 3, 3 ', at their upper part, to ensure the attachment of the apparatus 1 on a fixed point.
  • a drive shaft 4 of the braking system In the center of the yoke, perpendicularly to the flanges, is disposed a drive shaft 4 of the braking system.
  • the shaft 4 is integral with the hub of the braking system.
  • a central pulley 5 is placed outside the yoke, in front of the front flange 3, centered on the shaft 4 which it is secured.
  • the central pulley 5 is intended to receive the rope 6 presented in a loop and not by one of its ends.
  • rope guide means which are for example fixed axes or pulleys, and in the embodiment shown, two small pulleys 9 for guiding the rope 6.
  • These guide pulleys 9 are mounted idle on axes perpendicular to the front flange 3 and fixed to the front flange 3.
  • a guard plate 1 1 is mounted integral with the axes of the guide pulleys 9.
  • the guide pulleys 9 are spaced from one another to allow the passage of the rope 6 in a tight loop, on the one hand, between the guide pulleys 9, on the other hand between the front flange 3 and the front plate. guard 1 1. Once this passage made, the loop is open and the rope 6 is put in place in the groove of the central pulley 5, which he occupies the major part.
  • the same elements bear the same references as in FIG. 1.
  • the axes of the guide pulleys 9 are no longer integral with the front flange 3, and the guard plate 1 1 is carried by an arm 7 articulated on a hinge pin 10 carried by the front flange 3.
  • a flap 15 In front of the front flange 3, pulleys 5, 9, and the arm 7 carrying the guard plate January 1, is disposed a flap 15, articulated on an upper support 16 fixed to the front flange 3, by means of a hinge 8 .
  • At the lower part of the flap 15 of the guard plate 11 are provided two orifices 13 intended to each receive a peg or a tie for securing the plate 1 1 to the flap 15.
  • the ends of the rope 6 are provided with connecting rings to the harness of the roped person, the safety of which is ensured by the apparatus 1.
  • the arm 7 is returned to the position of FIG. 2 and the guard plate 11 and the flap 15 are secured.
  • the flap 15 serves to protect the pulleys 5 and 9.
  • the central pulley 5 has two cheeks 17 fixed with respect to the yoke, an outer ring 18 rotating, driven by the rope 6, and having an internal toothing 21.
  • a central gear 1 integral with the shaft 4, and provided with an external toothing 22.
  • planet gears 20 preferably in number 3 or 4, each having an external toothing 23 cooperating on the one hand with the internal toothing 21 of the outer ring 18 and on the other hand with the external toothing 22 of the central gear 19.
  • the planet gears 20 pivot on fixed axes carried by the fixed cheeks 17 of the central pulley 5. In the event of a fall, the rope 6 is rapidly urged and drives the outer ring 18, the internal toothing 21 of which rotates the planet gears 20, which in turn rotates the central gear 19 at an angular speed substantially greater than that of the outer ring 18.
  • the outer ring 18 is made of aluminum, the central gear 19 is of steel, and the planet gears 20 are made of composite material.
  • the groove of the central pulley 5 is provided with notches to better cooperate with the rope 6 in case of a fall.
  • These notches are arranged on the one hand at the bottom of the groove, 24, on the other hand on the sides of the groove, 25.
  • the notches 25 of the groove flanks are arranged in pairs facing each other, and the notches 24 of the groove bottom between two pairs of notches 25 of groove flank.
  • the notch of the groove of the central pulley 5 is achieved by radial milling at regular intervals of the bottom of the groove.
  • two secondary pulleys 26 are arranged symmetrically above the central pulley 5, between the front flange 3 and a holding plate 27.
  • the rope 6 is presented in a tight loop between the axes 9, under the 1 1 guard plate, then the loop is open to pass around the secondary pulleys 26 and the holding plate 27, then a tight loop is reformed to pass between the secondary pulleys 26 under the holding plate 27, and finally the loop is open and the rope 6 is put in place in the groove of the central pulley 5.
  • each of the two secondary pulleys 26 is mounted on an eccentric pivot 28, and has a circular arcuate lumen 29 centered on the pivot 28.
  • a fixed pin 30 In the lumen 29 is disposed a fixed pin 30 and between this pin 30 and the edge of the light the closest to the vertical axis passing through the center of the central pulley 5, is disposed a spring 31 which tends to bring the secondary beams 26 towards each other, which increases the length of the rope 6 in contact with the groove of the central pulley 5.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Emergency Lowering Means (AREA)
  • Pulleys (AREA)

Abstract

Fall-arrester safety device for an individual who is roped by means of a line (6) passing through the groove of a pulley (5), comprising a centrifugal braking system housed in a yoke and driven by the pulley. The pulley (5) is situated on the outside of the yoke and able to accept the line (6) in a loop.

Description

APPAREIL DE SECURITE ANTICHUTE  FALL SAFETY APPARATUS
L'invention concerne un appareil de sécurité antichute, pour personne encordée au moyen d'un cordage passant dans la gorge d'une poulie, comportant un système de freinage centrifuge logé dans une chape et entraîné par la poulie.  The invention relates to a fall arrest safety device for a person roped by means of a rope passing through the groove of a pulley, comprising a centrifugal braking system housed in a yoke and driven by the pulley.
De tels appareils de sécurité sont bien connus, mais ils présentent certains inconvénients.  Such security devices are well known, but they have certain disadvantages.
Tout d'abord, le cordage est mis en place avant la fermeture de la chape. En cas de rupture du cordage, ou d'échappement du cordage, la remise en place du cordage sans ouverture de la chape est malaisée et parfois impossible, lorsque, par exemple, le cordage présente une boucle à chaque extrémité pour y fixer un harnais. Ensuite, en cas de chute, le système de freinage centrifuge provoque un échauffement qui affecte tout le contenu de la chape et notamment la poulie entraînée par le cordage. First, the rope is put in place before closing the screed. In case of breakage of the rope, or escape of the rope, the replacement of the rope without opening the yoke is difficult and sometimes impossible, when, for example, the rope has a loop at each end to attach a harness. Then, in case of a fall, the centrifugal braking system causes a heating that affects the entire content of the yoke and in particular the pulley driven by the rope.
Enfin, du fait de l'entraînement direct du système de freinage centrifuge par la poulie, la limitation de la vitesse de chute n'est atteinte qu'après un entraînement du système de freinage suffisamment long pour qu'il devienne efficace. Finally, because of the direct drive of the centrifugal braking system by the pulley, the limitation of the falling speed is reached only after a braking system drive long enough to become effective.
Un but de l'invention est de proposer un appareil de sécurité antichute qui ne présente pas ces inconvénients, qui permette la remise en place du cordage de façon simple et rapide, qui entraîne le fonctionnement précoce du système de freinage en cas de chute, et qui assure une bonne dissipation de la chaleur. An object of the invention is to provide a fall arrest safety device which does not have these disadvantages, which allows the reattachment of the rope in a simple and fast way, which causes the early operation of the braking system in case of a fall, and which ensures a good dissipation of the heat.
L'invention a pour objet un appareil de sécurité antichute, pour personne encordée au moyen d'un cordage passant dans la gorge d'une poulie, comportant un système de freinage centrifuge logé dans une chape et entraîné par la poulie, caractérisé en ce que la poulie est située à l'extérieur de la chape et apte à recevoir le cordage en boucle.  The invention relates to a fall arrest safety device, for a person roped by means of a rope passing through the groove of a pulley, comprising a centrifugal braking system housed in a yoke and driven by the pulley, characterized in that the pulley is located outside the yoke and able to receive the rope in a loop.
Avantageusement, la chape comporte deux flasques métalliques parallèles, un flasque avant et un flasque arrière, la poulie étant disposée devant le flasque avant. Advantageously, the yoke comprises two parallel metal flanges, a front flange and a rear flange, the pulley being disposed in front of the front flange.
De préférence, deux moyens de guidage du cordage sont disposés sous ladite poulie, et suffisamment espacés pour que le cordage, présenté en boucle, soit insérable entre lesdits deux moyens de guidage. Preferably, two rope guiding means are disposed under said pulley, and sufficiently spaced so that the rope, presented in a loop, is insertable between said two guide means.
Avantageusement, lesdits moyens de guidage sont montés sur un bras articulé sur le flasque avant. Avantageusement, le flasque avant porte un volet articulé, apte à être solidarisé audit bras pour assurer le maintien dudit bras en position de fonctionnement, et la protection de la poulie. Advantageously, said guide means are mounted on an articulated arm on the front flange. Advantageously, the front flange carries an articulated flap, adapted to be secured to said arm to ensure the maintenance of said arm in the operating position, and the protection of the pulley.
De préférence, deux poulies secondaires sont disposées symétriquement au dessus de ladite poulie, pour recevoir le cordage avant ladite poulie.  Preferably, two secondary pulleys are arranged symmetrically above said pulley, to receive the rope before said pulley.
Avantageusement, chacune des poulies secondaires est montée sur un pivot excentré et sollicitée vers l'autre poulie secondaire par un ressort.  Advantageously, each of the secondary pulleys is mounted on an eccentric pivot and biased towards the other secondary pulley by a spring.
Selon un mode de réalisation, ladite poulie comporte deux joues fixes par rapport à la chape, une couronne extérieure tournante entraînée par le cordage, ladite couronne présentant une denture intérieure, un engrenage central entraînant le système de freinage centrifuge, et, entre la couronne extérieure et l'engrenage central, des engrenages satellites d'axe fixe par rapport auxdites joues, engrenant à la fois sur la couronne extérieure et sur l'engrenage central.  According to one embodiment, said pulley comprises two fixed cheeks with respect to the yoke, a rotating outer ring driven by the rope, said ring having an internal toothing, a central gear driving the centrifugal braking system, and between the outer ring and the central gear, planet gears fixed axis relative to said cheeks, meshing with both the outer ring and the central gear.
De préférence, la poulie a une gorge destinée à recevoir le cordage, ladite gorge étant munie d'un crantage.  Preferably, the pulley has a groove for receiving the rope, said groove being provided with a notch.
L'invention est décrite ci-après avec référence au dessin annexé sur lequel :  The invention is described below with reference to the appended drawing in which:
- la fig. 1 est une vue de face d'un premier mode de réalisation d'un appareil de sécurité selon l'invention, avant la mise en place du cordage,  - fig. 1 is a front view of a first embodiment of a security device according to the invention, before the introduction of the rope,
- la fig. 2 est une vue de face d'un deuxième mode de réalisation d'un appareil de sécurité selon l'invention après la mise en place du cordage,  - fig. 2 is a front view of a second embodiment of a security device according to the invention after the introduction of the rope,
- la fig. 3 est une vue de droite de l'appareil de sécurité de la fig. 2,  - fig. 3 is a right view of the security apparatus of FIG. 2
- la fig. 4 est une vue schématique d'un exemple de réalisation de la poulie centrale, - fig. 4 is a schematic view of an exemplary embodiment of the central pulley,
- la fig. 5 est une vue en coupe radiale de la gorge de la poulie centrale recevant le cordage. - fig. 5 is a radial sectional view of the groove of the central pulley receiving the rope.
- la fig. 6 est une vue de face d'un troisième mode de réalisation d'un appareil de sécurité selon l'invention, - fig. 6 is a front view of a third embodiment of a security device according to the invention,
- la fig. 7 est une vue de face d'un quatrième mode de réalisation d'un appareil de sécurité selon l'invention. Dans le premier mode de réalisation de la fig. 1, l'appareil 1 de sécurité antichute comprend une chape constituée de deux flasques parallèles, un flasque avant 3 et un flasque arrière 3 ', et d'une carcasse 12 (fig. 3) contenant le système de freinage centrifuge. - fig. 7 is a front view of a fourth embodiment of a security device according to the invention. In the first embodiment of FIG. 1, the fall protection apparatus 1 comprises a yoke consisting of two parallel flanges, a front flange 3 and a rear flange 3 ', and a casing 12 (FIG 3) containing the centrifugal braking system.
Ce système de freinage est de type classique, à moyeu échancré, avec deux masses en secteur annulaire reliées par des ressorts, et des garnitures de friction contre un tambour extérieur fixe dans la chape. This braking system is of the conventional type, notched hub, with two annular sector masses connected by springs, and friction linings against a fixed outer drum in the yoke.
Les flasques 3 et 3' sont de préférence en aluminium pour jouer le rôle de radiateur car le frottement des garnitures sur le tambour provoque un échauffement qu'il convient de dissiper.  The flanges 3 and 3 'are preferably aluminum to act as a radiator because the friction of the linings on the drum causes a heating that should be dissipated.
Des anneaux d'ancrage 2 sont disposés entre les flasques 3, 3 ', à leur partie supérieure, pour assurer la fixation de l'appareil 1 sur un point fixe.  Anchor rings 2 are arranged between the flanges 3, 3 ', at their upper part, to ensure the attachment of the apparatus 1 on a fixed point.
Au centre de la chape, perpendiculairement aux flasques, est disposé un arbre 4 d'entraînement du système freinage.  In the center of the yoke, perpendicularly to the flanges, is disposed a drive shaft 4 of the braking system.
L'arbre 4 est solidaire du moyeu du système de freinage. Une poulie centrale 5 est placée à l'extérieur de la chape, devant le flasque avant 3, centrée sur l'arbre 4 dont elle est solidaire. La poulie centrale 5 est destinée à recevoir le cordage 6 présenté en boucle et non pas par l'une de ses extrémités. The shaft 4 is integral with the hub of the braking system. A central pulley 5 is placed outside the yoke, in front of the front flange 3, centered on the shaft 4 which it is secured. The central pulley 5 is intended to receive the rope 6 presented in a loop and not by one of its ends.
Sous la poulie centrale 5, devant le flasque avant 3, sont disposés des moyens de guidage du cordage, qui sont par exemple des axes fixes ou des poulies, et dans le mode de réalisation représenté, deux petites poulies 9 de guidage du cordage 6.  Under the central pulley 5, in front of the front flange 3, there are arranged rope guide means, which are for example fixed axes or pulleys, and in the embodiment shown, two small pulleys 9 for guiding the rope 6.
Ces poulies 9 de guidage sont montées folles sur des axes perpendiculaires au flasque avant 3 et fixées à ce flasque avant 3.  These guide pulleys 9 are mounted idle on axes perpendicular to the front flange 3 and fixed to the front flange 3.
En avant des poulies 9 de guidage, une plaque de garde 1 1 est montée solidaire des axes des poulies 9 de guidage.  In front of the guide pulleys 9, a guard plate 1 1 is mounted integral with the axes of the guide pulleys 9.
Les poulies 9 de guidage sont espacées l'une de l'autre pour permettre le passage du cordage 6 en boucle serrée, d'une part, entre les poulies 9 de guidage, d'autre part entre le flasque avant 3 et la plaque de garde 1 1. Une fois ce passage effectué, la boucle est ouverte et le cordage 6 est mis en place dans la gorge de la poulie centrale 5, dont il occupe la majeure partie. Dans le deuxième mode de réalisation de la fig. 2, les mêmes éléments portent les mêmes références que dans la fig. 1. Les axes des poulies 9 de guidage ne sont plus solidaires du flasque avant 3, et la plaque de garde 1 1 est portée par un bras 7 articulé sur un axe 10 d'articulation porté par le flasque avant 3. The guide pulleys 9 are spaced from one another to allow the passage of the rope 6 in a tight loop, on the one hand, between the guide pulleys 9, on the other hand between the front flange 3 and the front plate. guard 1 1. Once this passage made, the loop is open and the rope 6 is put in place in the groove of the central pulley 5, which he occupies the major part. In the second embodiment of FIG. 2, the same elements bear the same references as in FIG. 1. The axes of the guide pulleys 9 are no longer integral with the front flange 3, and the guard plate 1 1 is carried by an arm 7 articulated on a hinge pin 10 carried by the front flange 3.
En avant du flasque avant 3, des poulies 5, 9, et du bras 7 portant la plaque de garde 1 1 , est disposé un volet 15, articulé sur un support supérieur 16 fixé au flasque avant 3, au moyen d'une articulation 8. In front of the front flange 3, pulleys 5, 9, and the arm 7 carrying the guard plate January 1, is disposed a flap 15, articulated on an upper support 16 fixed to the front flange 3, by means of a hinge 8 .
A la partie inférieure du volet 15 de la plaque de garde 11 sont prévus deux orifices 13 destinés à recevoir chacun une cheville ou un lien de solidarisation de la plaque 1 1 au volet 15.  At the lower part of the flap 15 of the guard plate 11 are provided two orifices 13 intended to each receive a peg or a tie for securing the plate 1 1 to the flap 15.
Avantageusement, les extrémités du cordage 6 sont munies d'anneaux de liaison au harnais de la personne encordée, dont la sécurité est assurée par l'appareil 1.  Advantageously, the ends of the rope 6 are provided with connecting rings to the harness of the roped person, the safety of which is ensured by the apparatus 1.
Dans le deuxième mode de réalisation de la fig. 2, lorsque le volet 15 et la plaque de garde 1 1 ne sont pas solidarisés, le bras 7 portant la plaque de garde 11 et les poulies 9 de guidage pivote sur l'axe 10, les poulies 9 de guidage sont éloignées de la poulie centrale 5, et l'insertion du cordage 6 en boucle entre les poulies 9 de guidage, puis sa mise en place autour de la poulie centrale 5, se trouvent facilitées.  In the second embodiment of FIG. 2, when the flap 15 and the guard plate 1 1 are not secured, the arm 7 carrying the guard plate 11 and the guide pulleys 9 pivots on the axis 10, the guide pulleys 9 are moved away from the pulley central 5, and the insertion of the rope 6 in a loop between the pulleys 9 of guide, and its establishment around the central pulley 5, are facilitated.
Ensuite, le bras 7 est remis dans la position de la fig. 2 et la plaque de garde 11 et le volet 15 sont solidarisés. Le volet 15 joue un rôle de protection des poulies 5 et 9. Dans le mode de réalisation représenté à la fig. 4, la poulie centrale 5 comporte deux joues 17 fixes par rapport à la chape, une couronne extérieure 18 tournante, entraînée par le cordage 6, et présentant une denture intérieure 21.  Then, the arm 7 is returned to the position of FIG. 2 and the guard plate 11 and the flap 15 are secured. The flap 15 serves to protect the pulleys 5 and 9. In the embodiment shown in FIG. 4, the central pulley 5 has two cheeks 17 fixed with respect to the yoke, an outer ring 18 rotating, driven by the rope 6, and having an internal toothing 21.
Sur l'arbre 4 est monté un engrenage central 1 solidaire de l'arbre 4, et muni d'une denture extérieure 22. Entre la couronne extérieure 18 et l'engrenage central 19, sont disposés des engrenages satellites 20, de préférence au nombre de 3 ou 4, présentant chacun une denture extérieure 23 coopérant d'une part avec la denture intérieure 21 de la couronne extérieure 18 et d'autre part avec la denture extérieure 22 de l'engrenage central 19.  On the shaft 4 is mounted a central gear 1 integral with the shaft 4, and provided with an external toothing 22. Between the outer ring gear 18 and the central gear 19, there are arranged planet gears 20, preferably in number 3 or 4, each having an external toothing 23 cooperating on the one hand with the internal toothing 21 of the outer ring 18 and on the other hand with the external toothing 22 of the central gear 19.
Les engrenages satellites 20 pivotent sur des axes fixes portés par les joues fixes 17 de la poulie centrale 5. En cas de chute, le cordage 6 est sollicité rapidement et entraîne la couronne extérieure 18, dont la denture intérieure 21 entraîne en rotation les engrenages satellites 20, qui à leur tour entraînent en rotation l'engrenage central 19 à une vitesse angulaire nettement supérieure à celle de la couronne extérieure 18. The planet gears 20 pivot on fixed axes carried by the fixed cheeks 17 of the central pulley 5. In the event of a fall, the rope 6 is rapidly urged and drives the outer ring 18, the internal toothing 21 of which rotates the planet gears 20, which in turn rotates the central gear 19 at an angular speed substantially greater than that of the outer ring 18.
De ce fait, le système de freinage centrifuge est actionné de façon plus précoce qu'en cas de liaison directe entre la poulie centrale 5 et l'arbre 4 du premier mode de réalisation de la fig. 1. As a result, the centrifugal braking system is actuated earlier than in the case of a direct connection between the central pulley 5 and the shaft 4 of the first embodiment of FIG. 1.
Avantageusement, la couronne extérieure 18 est en aluminium, l'engrenage central 19 en acier, et les engrenages satellites 20 en matériau composite.  Advantageously, the outer ring 18 is made of aluminum, the central gear 19 is of steel, and the planet gears 20 are made of composite material.
De préférence, la gorge de la poulie centrale 5 est munie de crans pour mieux coopérer avec le cordage 6 en cas de chute. Ces crans sont disposés d'une part en fond de gorge, 24, d'autre part sur les flancs de gorge, 25. Preferably, the groove of the central pulley 5 is provided with notches to better cooperate with the rope 6 in case of a fall. These notches are arranged on the one hand at the bottom of the groove, 24, on the other hand on the sides of the groove, 25.
De préférence, les crans 25 des flancs de gorge sont disposés par paires en vis-à-vis, et les crans 24 de fond de gorge entre deux paires de crans 25 de flanc de gorge. En variante, le crantage de la gorge de la poulie centrale 5 est réalisé par fraisage radial à intervalles réguliers du fond de gorge.  Preferably, the notches 25 of the groove flanks are arranged in pairs facing each other, and the notches 24 of the groove bottom between two pairs of notches 25 of groove flank. Alternatively, the notch of the groove of the central pulley 5 is achieved by radial milling at regular intervals of the bottom of the groove.
Dans le troisième mode de réalisation de la fig. 6, deux poulies secondaires 26 sont disposées symétriquement au dessus de la poulie centrale 5, entre le flasque avant 3 et une plaque de maintien 27. Pour sa mise en place, le cordage 6 est présenté en boucle serrée entre les axes 9, sous la plaque de garde 1 1, puis la boucle est ouverte pour passer autour des poulies secondaires 26 et de la plaque de maintien 27, puis une boucle serrée est reformée pour passer entre les poulies secondaires 26 sous la plaque de maintien 27, et enfin la boucle est ouverte et le cordage 6 est mis en place dans la gorge de la poulie centrale 5.  In the third embodiment of FIG. 6, two secondary pulleys 26 are arranged symmetrically above the central pulley 5, between the front flange 3 and a holding plate 27. For its implementation, the rope 6 is presented in a tight loop between the axes 9, under the 1 1 guard plate, then the loop is open to pass around the secondary pulleys 26 and the holding plate 27, then a tight loop is reformed to pass between the secondary pulleys 26 under the holding plate 27, and finally the loop is open and the rope 6 is put in place in the groove of the central pulley 5.
Dans le quatrième mode de réalisation de la fïg. 7 ; chacune des deux poulies secondaire 26 est montée sur un pivot 28 excentré, et présente une lumière 29 en arc de cercle centré sur le pivot 28. Dans la lumière 29 est disposé un pion fixe 30 et entre ce pion 30 et le bord de la lumière le plus proche de l'axe vertical passant par le centre de la poulie centrale 5, est disposé un ressort 31 qui tend à ramener les pouLies secondaires 26 l 'une vers l'autre, ce qui augmente la longueur du cordage 6 en contact avec la gorge de la poulie centrale 5. L'invention a été décrite avec référence à des modes de réalisation présentés à titre illustratif et non limitatif. In the fourth embodiment of FIG. 7; each of the two secondary pulleys 26 is mounted on an eccentric pivot 28, and has a circular arcuate lumen 29 centered on the pivot 28. In the lumen 29 is disposed a fixed pin 30 and between this pin 30 and the edge of the light the closest to the vertical axis passing through the center of the central pulley 5, is disposed a spring 31 which tends to bring the secondary beams 26 towards each other, which increases the length of the rope 6 in contact with the groove of the central pulley 5. The invention has been described with reference to embodiments presented for illustrative and not limiting.

Claims

REVENDICATIONS
Appareil de sécurité antichute, pour personne encordée au moyen d'un cordage (6) passant dans la gorge d'une poulie (5), comportant un système de freinage centrifuge logé dans une chape et entraîné par la poulie, dans lequel la poulie (5) est située à l'extérieur de la chape et apte à recevoir le cordage (6) en boucle, la chape comporte deux flasques métalliques parallèles, un flasque avant (3) et un flasque arrière (3'), la poulie (5) étant disposée devant le flasque avant (3), deux moyens de guidage (9) du cordage (6) sont disposés sous ladite poulie (5), et suffisamment espacés pour que le cordage (6), présenté en boucle serrée, soit insérable d'une part entre lesdits deux moyens de guidage (9), d'autre part entre le flasque avant (3) et une plaque de garde (11), caractérisé en ce que deux poulies secondaires (26) sont disposées symétriquement au dessus de ladite poulie (5), entre le flasque avant (3) et une plaque de maintien (27) pour recevoir le cordage (6), en boucle serrée, entre les poulies secondaires (26) et sous la plaque de maintien (27), avant ladite poulie (5). Fall arrest safety apparatus, for a person roped by means of a rope (6) passing through the groove of a pulley (5), comprising a centrifugal brake system housed in a yoke and driven by the pulley, in which the pulley ( 5) is located outside the yoke and adapted to receive the rope (6) loop, the yoke comprises two parallel metal flanges, a front flange (3) and a rear flange (3 '), the pulley (5). ) being disposed in front of the front flange (3), two guide means (9) of the rope (6) are arranged under said pulley (5), and sufficiently spaced so that the rope (6), presented in a tight loop, is insertable on the one hand between said two guide means (9), on the other hand between the front flange (3) and a guard plate (11), characterized in that two secondary pulleys (26) are arranged symmetrically above said pulley (5) between the front flange (3) and a holding plate (27) for receiving the rope (6), in a tight loop, between the secondary pulleys (26) and under the holding plate (27), before said pulley (5).
Appareil de sécurité selon la revendication 1 caractérisé en ce que chacune desdites poulies secondaires (26) est montée sur un pivot (28) excentré et sollicitée vers l'autre poulie secondaire par un ressort (31).  Safety device according to claim 1 characterized in that each of said secondary pulleys (26) is mounted on a pivot (28) eccentric and biased towards the other secondary pulley by a spring (31).
Appareil de sécurité selon la revendication 1 caractérisé en ce que ladite poulie (5) comporte deux joues (17) fixes par rapport à la chape, une couronne (18) extérieure tournante entraînée par le cordage (6), ladite couronne (18) présentant une denture intérieure (21), un engrenage central (19) entraînant le système de freinage centrifuge, et, entre la couronne extérieure (18) et l'engrenage central (19), des engrenages satellites (20) d'axe fixe par rapport auxdites joues (17), engrenant à la fois sur la couronne extérieure (18) et sur l'engrenage central (19).  Safety device according to claim 1 characterized in that said pulley (5) comprises two cheeks (17) fixed relative to the yoke, a rotating outer ring (18) driven by the rope (6), said ring (18) having an internal toothing (21), a central gear (19) driving the centrifugal braking system, and, between the outer ring (18) and the central gear (19), planet gears (20) having a fixed axis relative to said cheeks (17) meshing with both the outer ring (18) and the central gear (19).
Appareil de sécurité selon la revendication 1 caractérisé en ce que la poulie (5) a une gorge destinée à recevoir le cordage (6), ladite gorge étant munie de crans (24,25). Safety device according to claim 1 characterized in that the pulley (5) has a groove for receiving the rope (6), said groove being provided with notches (24,25).
5. Appareil de sécurité selon la revendication 1 caractérisé en ce que lesdits moyens de guidage (9) sont montés sur un bras (7) articulé sur le flasque avant (3). 5. Safety device according to claim 1 characterized in that said guide means (9) are mounted on an arm (7) hinged to the front flange (3).
6. Appareil de sécurité selon la revendication 5 caractérisé en ce que le flasque avant (3) porte un volet (15) articulé, apte à être solidarisé audit bras (7) pour assurer le maintien dudit bras (7) en position de fonctionnement, et la protection de la poulie (5).  6. Safety device according to claim 5 characterized in that the front flange (3) carries a flap (15) hinged, adapted to be secured to said arm (7) to maintain said arm (7) in the operating position, and the protection of the pulley (5).
EP11794810.9A 2010-11-16 2011-11-10 Fall-arrester safety device Withdrawn EP2640472A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1059406A FR2967357B1 (en) 2010-11-16 2010-11-16 FALL SAFETY APPARATUS
PCT/FR2011/000603 WO2012066196A1 (en) 2010-11-16 2011-11-10 Fall-arrester safety device

Publications (1)

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EP2640472A1 true EP2640472A1 (en) 2013-09-25

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Application Number Title Priority Date Filing Date
EP11794810.9A Withdrawn EP2640472A1 (en) 2010-11-16 2011-11-10 Fall-arrester safety device

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EP (1) EP2640472A1 (en)
FR (1) FR2967357B1 (en)
WO (1) WO2012066196A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2998183B1 (en) * 2012-11-20 2015-07-31 Marcel Jose Peltier RETARDER DEVICE FOR HEAVY LOAD DESCENT
CN113893471B (en) * 2021-11-08 2022-11-25 嘉兴学院 High-rise emergency slow-falling escapement mechanism and slow-falling device thereof

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Publication number Priority date Publication date Assignee Title
GB373728A (en) * 1931-04-15 1932-06-02 James Robert Longworth Improvements in or connected with fire escapes
CA1309393C (en) * 1986-12-28 1992-10-27 Tbr Corporation Emergency descending device
FR2714612B1 (en) * 1994-01-05 1996-05-15 Marcel Jose Peltier Anti-fall safety device.
GB0428335D0 (en) * 2004-12-24 2005-02-02 Equip Securite Par Pare Chute Emergency vertical egress device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2012066196A1 *

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WO2012066196A1 (en) 2012-05-24
FR2967357A1 (en) 2012-05-18

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