EP3599000A1 - Abseiling device with pulley - Google Patents

Abseiling device with pulley Download PDF

Info

Publication number
EP3599000A1
EP3599000A1 EP19187414.8A EP19187414A EP3599000A1 EP 3599000 A1 EP3599000 A1 EP 3599000A1 EP 19187414 A EP19187414 A EP 19187414A EP 3599000 A1 EP3599000 A1 EP 3599000A1
Authority
EP
European Patent Office
Prior art keywords
rotation
pulley
rope
axis
cam
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
EP19187414.8A
Other languages
German (de)
French (fr)
Other versions
EP3599000B1 (en
Inventor
Pierre-Olivier Chabod
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.)
Zedel SAS
Original Assignee
Zedel SAS
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 Zedel SAS filed Critical Zedel SAS
Publication of EP3599000A1 publication Critical patent/EP3599000A1/en
Application granted granted Critical
Publication of EP3599000B1 publication Critical patent/EP3599000B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • A62B1/14—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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
    • B66D3/046—Openable pulley blocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D2700/00—Capstans, winches or hoists
    • B66D2700/02—Hoists or accessories for hoists
    • B66D2700/026—Pulleys, sheaves, pulley blocks or their mounting

Definitions

  • the invention relates to a self-locking pulley descender whose operation is improved and more particularly to a self-locking pulley descender capable of supporting large loads in the form of a self-blocking pulley.
  • a blocking pulley which can be used in the event of a fall into a crevasse or to lift any heavy load.
  • a blocking pulley must have a good yield when used as a pulley as well as a good capacity to block the rope.
  • the blocking pulley must have a reduced weight and size because the equipment is permanently in the bag and is used very rarely.
  • a pulley descender marketed under the name "MAESTRO" by the applicant.
  • a descender comprises a pulley configured to rotate only in one direction around its axis of rotation.
  • the descender also includes a rotary cam which is configured to lock the rope when the movement of the rope is intended to generate a rotation of the pulley in the second direction of rotation.
  • the cam is in permanent or almost permanent contact with the rope so that the movement of the rope to generate the second direction of rotation of the pulley causes the rotation of the cam towards a locking position.
  • the inventors have noticed that the speed of blocking changes significantly with the surface quality of the rope as well as with the temperature of the descender.
  • An object of the invention aims to remedy these drawbacks by proposing a self-locking pulley which improves the blocking of the rope, in particular by means of a configuration in which the evolution of the coefficient of friction has less importance in blocking. rope.
  • a spring is arranged to apply a force moving the cam towards the rope blocking zone.
  • the spring is arranged to move the first axis of rotation to a first position. The application of a force on the rope to obtain the rotation of the pulley according to the first direction of rotation moves the first axis of rotation to move away from the first position
  • the first axis of rotation is mounted mobile in rotation relative to the first flange around the second axis of rotation, the first axis of rotation being mobile according to the first direction of rotation and the second direction of rotation relative to the second axis of rotation, the blocking of the pulley in the second direction of rotation causing the displacement of the first axis of rotation and of the pulley in the second direction of rotation around the second axis of rotation.
  • the first axis of rotation is offset from the second axis of rotation so that the application of a stress on the rope to rotate the pulley in the first direction of rotation generates a moment aimed at shifting the cam from the area of blocking and that the disappearance of said constraint causes the displacement of the cam towards the blocking zone.
  • the pulley when the pulley moves in the first direction of rotation, the pulley is in a first position which is further from the rope blocking area than a second position representative of a blocking of the rope.
  • the rotation of the pulley and of the first axis of rotation in the second direction of rotation cause the rotation of the cam around the second axis of rotation to bring the cam closer to the blocking zone.
  • cam is mounted fixed on the second axis of rotation or on the first axis of rotation.
  • the first flange has a first groove.
  • the pulley and the second axis of rotation are mounted on a support associated with a first pin passing through the first groove.
  • the movement of the first pin along the first groove causes the support to rotate in the first direction of rotation.
  • the descender is provided with a handle comprising a stop arranged to come into contact with the first pin, the rotation of the handle in the first direction of rotation causes the rotation of the first pin in the first direction of rotation.
  • the first flange has a second groove.
  • the support is associated with a second pin passing through the second groove, a spring being fixed to the first flange to move the second pin in the second direction of rotation.
  • the spring is mounted around the second axis of rotation.
  • the pulley comprises a toothed wheel associated with at least one blocker and a blocking spring.
  • the toothed wheel, the at least one blocker and the blocking spring are arranged to allow rotation of the pulley in the first direction of rotation and to prevent rotation in the second direction of rotation.
  • the pulley has a plurality of flats arranged in a groove of the pulley so as to define narrowing in the groove.
  • the invention also relates to a method of blocking a rope in a self-locking pulley.
  • the method allows easier blocking of the rope in the self-blocking pulley by reducing the dependence on the coefficient of friction which exists between the rope and the self-blocking pulley.
  • the figures 1 and 2 represent perspective views of a self-locking descender 1 with pulley 2.
  • the self-locking descender 1 has a first flange 3 provided with a side wall 3a defining a circulation path of a rope 4 inside the descender 1.
  • the descender defines two entry / exit holes for the rope in the descender 1.
  • the rope enters the descender through a first opening passes over the pulley 2 and exits the descender through the second opening.
  • the rope is divided into a first strand and a second strand depending on whether one is on one side or the other of the pulley 2.
  • the descender has a circulation path which is intended to receive the rope 4.
  • the rope 4 moves inside the rope circulation path.
  • the rope circulation path has a support wall which makes the mechanical connection with the rope 4. When the rope is under tension, it presses on the support wall which applies a force to the descender.
  • the figure 1 represents a closed descender while the figure 2 represents an open descender. Opening the descender 1 allows the rope 4 to be installed or removed. Closing the descender 1 keeps the rope 4 in the descender 1.
  • the descender 1 has a pulley 2 which is rotatably mounted relative to the first flange 3.
  • the pulley 2 rotates around a first axis of rotation A.
  • the pulley 2 is mounted on a first shaft 25 which defines the first axis of rotation A
  • the tree 25 is illustrated in figure 8 for example.
  • Pulley 2 is configured to rotate only in one direction of rotation.
  • the pulley 2 has an autorotation and it is configured to rotate according to a first direction of rotation noted + and it configured to be blocked when it is desired to perform a rotation according to the second direction of rotation noted - and opposite at the first direction of rotation.
  • the pulley 2 rotates according to the first direction of rotation.
  • the pulley 2 is blocked. More to be mounted movable in rotation around the first axis of rotation A, the pulley 2 is also mounted movable relative to the first flange 3 to move between first and second positions.
  • the figure 3 represents the pulley 2 in the first position while the figure 4 represents the pulley 2 in the second position.
  • the second position is closer to the side wall 3a than the first position, which makes it possible to define a position for blocking the rope.
  • the first position allows the rope 4 to slide relative to the descender 1 in a configuration equivalent to a rotation of the pulley in the second direction of rotation.
  • the pulley 2 being locked in the second direction of rotation, the movement of the rope 4 is done by sliding.
  • This embodiment is particularly advantageous because the rope 4 is in direct contact with the pulley 2 which increases the contact surface used to move towards the blocking position.
  • the increased contact surface between the pulley 2 and the rope 4 facilitates the displacement of the pulley 2 towards the locking position.
  • the pulley 2 being fixed because in the impossibility of turning in the second direction of rotation, the friction of the rope 4 on the pulley 2 is used to reach the threshold blocking position.
  • the pulley is only mounted movable in rotation about its axis of rotation so that the tension applied to the second strand of the rope blocks the pulley.
  • the movement of the rope generates a friction force opposing the force applied by a spring to move a cam and reach the blocking position of the rope. Since the cam has a reduced surface, it is more difficult to achieve sufficient friction of the rope on the cam for the cam to reach the locking position. It is also difficult to have sufficient friction between the rope and the pulley to counter the effect of the spring and ensure adequate release of the blockage. If the force generated by the spring is too weak it can unexpectedly block the rope.
  • the movement of the pulley 2 can be any to reach the threshold blocking position. It is possible to use a movement in translation, a movement a rotation or a combination of these two movements. In a particularly advantageous manner, a rotational movement is preferred since it makes it possible to better manage the force applied to the pulley 2 with regard to the tension present in the rope 4.
  • the first axis of rotation A is mounted mobile in rotation relative to the first flange 3 around a second axis of rotation B different from the first axis of rotation A.
  • the first axis of rotation A is mobile according to the first direction of rotation + and according to the second direction of rotation - relative to the second axis of rotation B.
  • the blocking of the pulley 2 according to the second direction of rotation - causes the displacement of the first axis of rotation A and of the pulley 2 according to the second direction of rotation around the second axis of rotation B so that the distance between the pulley and the side wall 3a of the first flange 1 decreases to the threshold position where blocking occurs.
  • the rotation of the pulley 2 can cause displacement of the first axis of rotation A to move away from a rope locking position 4.
  • the pulley 2 moves in the first direction of rotation +, the pulley 2 is outside the second position and preferably in the first position which is further from the wall lateral 3a than the second position.
  • the rope 4 must not overcome a high frictional force which allows to maintain a high yield when drawing a load fixed to the second strand.
  • the support wall of the circulation path is exclusively formed by the pulley which avoids areas of friction of the rope.
  • Pulley 2 rotates to move the portion of rope until the portion of rope exits descender 1. During its movement in the descender, the portion of rope was found only in contact with the pulley which limits the friction of the rope inside the descender. As illustrated in the various figures, the support wall of the circulation path defines a semicircle which is formed by the pulley 2 which increases the quality of the contact between the rope and the pulley. The pulley ensures the recovery of force in the first position and the second position of the support 7. The pulley defines a path for circulation of the rope with a semicircle whose radius of curvature corresponds to the radius of the pulley in its groove.
  • the internal wall of the circulation path defines a semicircle which corresponds to half of the pulley.
  • the weight of the load to be supported is taken up entirely by the pulley and the rope 4 can circulate in the descender by following the rotation of the pulley in a semicircle which avoids the formation of sliding zones and therefore of friction zones.
  • the circulation path defines a semicircle by means of the pulley.
  • the rope is in pulley contact on half of the pulley.
  • the external wall of the pulley is devoid of overlap by the cam over more than half of the perimeter of the pulley, which makes it possible to have an almost complete force recovery by the pulley. The resumption of force by the pulley occurs regardless of the position of the pulley between the first position and the second position.
  • the document US 2014/0262611 proposes a configuration with a movable cam of which a part of the support wall is formed by a pulley so as to modulate the frictional force according to the speed of translation of the rope.
  • the rest of the support wall is formed by a friction zone present on either side of a diameter of the pulley to ensure friction between the rope and the locking system.
  • the pulley locks which increases the friction and causes the rotation of the cam.
  • the descender 1 has a cam 5 or shoe for blocking the rope 4 against the side wall 3a of the first flange 3.
  • the rotation of the pulley 2 and of the first axis of rotation A according to the second direction of rotation causes the appearance of a force which induces the rotation of the cam 5 around the second axis of rotation B with a decrease in the distance between the cam 5 and the blocking zone up to the threshold position representative of the blocking of the rope.
  • the rotation of the pulley 2 around the first axis of rotation A in the first direction of rotation causes the appearance of a force which induces the rotation of the cam 5 around the second axis of rotation B with an increase in the distance between the cam 5 and the locking zone to exit the rope locking position 4.
  • a movable cam 5 separate from the pulley 3 and projecting from the pulley 2 ensures better locking of the rope 4 between the cam 5 and the side wall 3a.
  • the movement of the pulley 2 allows the cam to be brought closer 5 from its locking position which facilitates obtaining the blocking of the rope 4.
  • the movement of the pulley 2 advantageously makes it possible to move the cam 5 in order to increase the tension applied by the cam 5 on the rope 4 by bringing it closer of the side wall 3a, which makes it easier to obtain a threshold friction force ensuring the self-locking of the rope 4.
  • the cam 5 is rotatably mounted around a second shaft 26 which defines a second axis of rotation B distinct from the first axis of rotation A.
  • the cam 5 is rotatably mounted around the second axis of rotation B so that the position of the cam 5 relative to the blocking zone is linked to the position of the first shaft 25.
  • the first axis of rotation A is offset from the second axis of rotation B so that the application of a force on the rope 4 to rotate the pulley 2 in the first direction of rotation + generates a force aimed at moving the cam away 5 of the blocking zone.
  • the application of a force on the rope 4 to rotate the pulley 2 in the second direction of rotation - generates a force aimed at bringing the cam 5 closer to the blocking zone.
  • the offset between the two axes of rotation A and B induces the appearance of a torque when the first strand of rope 4 or the second strand of rope 4 is pulled. It is particularly advantageous to use this torque to move the cam 5 or generate a force aimed at moving the cam 5.
  • the two axes of rotation are spaced by a distance which is less than the radius of the pulley 2.
  • the angular offset of the axis of the pulley and of the cam 5 is reduced between the two positions which allows to have a resumption of effort by means of pulley 2, the position of which changes little according to the direction of rotation sought for the pulley.
  • the first axis of rotation A and the second axis of rotation B are placed so that the weight of the pulley 2 causes the cam 5 to move out of the rope locking position 4.
  • the first axis of rotation A and the second axis of rotation B are placed so that when the first strand of rope is pulled, the pulley 2 and the cam 5 move to move away from the locking position before the pulley 2 begins to rotate around the first axis of rotation A.
  • the cam 5 is fixedly mounted on the first shaft 25, this configuration makes it possible to have, for example, the rotation of the cam 5 in an identical manner to the rotation of the second axis of rotation B.
  • first flange 3 has a first groove 6 and in which the position of the pulley 2 is represented by the position of an indicator in the first groove 6. It is then possible to quickly determine if the blocking of the rope 4 comes from the position of the pulley 2 or from another element. If the indicator cooperates with a handle 12, the position of the handle 12 provides an indication of the position of the indicator.
  • the pulley 2 and the second axis of rotation B are mounted on a support 7 associated with a first pin 8 passing through the first groove 6.
  • the movement of the first pin 8 along the first groove 6 causes the rotation of the support 7 according to the first meaning of rotation + and according to the second direction of rotation.
  • the rotation of the support 7 causes the rotation of the first pin 8.
  • the support 7 moves between a first position and a second position.
  • it is particularly advantageous to provide that the axis of rotation B of the support 7, the axis of rotation of the pulley and the point of attachment of the descender to an anchor point are not aligned because this facilitates rotation of the cam between its blocking position and its other position.
  • the first flange 3 defines a second groove 9.
  • the position of the pulley 2 relative to the first flange 3 is represented by the position of a second indicator in the second groove 9.
  • the support 7 is associated with a second pin 10 which passes through the second groove 9.
  • a spring 11 fixed to the first flange 3 to move the pulley 2 to the second position, that is to say move the second pin 10 to facilitate the blocking of the rope 4.
  • the spring 11 is configured to move the pulley 2 according to the second direction of rotation - and tend towards the position for blocking the rope 4.
  • the spring 11 is fixed to the second indicator, here the second pin 10 so as not to interfere with the rotation of the pulley 2 and the routing of the rope 4.
  • the spring 11 is separated from the pulley 2 by the first flange 3 which makes it possible to have a compact architecture in the path of the rope 4.
  • the spring 11 can be produced by any known technique, for example with a torsion coil spring , in tension or compression. It is also possible to form a spring 11 by elastic deformation of one or more plates. It is particularly advantageous to provide that the spring 11 is mounted around the second axis of rotation B, which makes it possible to gain compactness.
  • the descender 1 has a handle 12 as illustrated in Figures 1 to 7 .
  • the handle 12 comprises a stop 12a arranged to come into contact with the first pin 8.
  • the rotation of the handle 12 according to the first direction of rotation causes the stop 12a to come into contact with the first pin then the displacement of the first pin according to the first direction of rotation +.
  • This embodiment is particularly advantageous when the second pin 10 is associated with the spring 11.
  • the spring 11 is arranged to move the pulley 2 towards the locking position.
  • the rotation of the handle 12 from a standby position makes it possible to bring the stop 12a into contact with the first pin 8.
  • the stop 12a presses on the first pin 8 which moves.
  • the handle 12 exerts a force which opposes the force applied by the spring 11 which displaces the pulley 2 and the cam 5 if necessary.
  • the stress applied on the rope 4 decreases, which allows the rope to slide.
  • the movement of the handle 12 makes it possible to regulate the distance between the pulley 2 / the cam 5 and the side wall 3a, which allows the intensity to be regulated. of the friction force and therefore the speed of travel of the rope 4 in the descender 1.
  • the spring 11 displaces the cam 5 towards the blocking zone, that is to say displaces the cam 5 towards a position for blocking the rope so that, by default, the cam 5 blocks the rope 4 regardless of the intensity of the friction between the rope 4 and the pulley 2.
  • the cam 5 is by default in a position which blocks the rope 4.
  • the torque generated opposes the spring, which allows a movement of the pulley and a movement of the cam.
  • the cam no longer blocks the rope which can be pulled by taking advantage of the rotation of the pulley to obtain a high yield during pulling.
  • the self-locking descender 1 comprises a pulley 2 provided with a toothed wheel 13 associated with at least one blocker 14 and a spring 15 called a blocking spring.
  • the toothed wheel 13, the at least one blocker 14 and the spring 15 are arranged to allow rotation of the pulley 2 according to the first direction of rotation + and to prevent rotation of the pulley 2 according to the second direction of rotation -.
  • This configuration is particularly advantageous because the locking system according to the second direction of rotation is located inside the pulley 2 which does not hinder the routing of the rope 4.
  • the spring 15 is mounted in the pulley 2 in order to facilitate its integration and the compactness of the pulley 2.
  • other configurations are possible.
  • the pulley 2 comprises a plurality of flats 16 arranged in a groove in the pulley 2 so as to define narrowing in the groove. These multiple decreases in the section of the groove of the pulley 2 form areas of privileged friction when the rope 4 must slide along the pulley 2. It is also possible to provide for the use of a smooth roller or a faceted roller. In one embodiment, the roller can define a groove whose section is more or less pronounced V-shaped in order to define the friction force.
  • the first flange 3 is associated with a second flange 17 which is mounted movable relative to the first flange 3.
  • the second flange 17 is mounted movable in rotation about a third axis of rotation C. The rotation of the second flange 17 makes it possible to open or close the descender 1 as illustrated in figures 1 and 2 .
  • the first flange 3 and the second flange 17 each define a fixing opening 18.
  • the two fixing openings 18 are placed opposite so as to cooperate with a connector (not shown), for example a carabiner which allows to fix the descender 1 at a fixed point.
  • the first flange 3 also defines a second fixing opening 19 for installing, for example, a carabiner.
  • the first flange 3 has a blocking stop 20 which is configured to block the progression of the second flange 17 to its closed position which closes the descender 1.
  • the cam 5 is fixed to the support 7 by means of a fixing element 22 which extends through the first opening 6 to form the first pin 8.
  • the fixing element 22 passes through the support 7 until a second support 23 is reached.
  • the second support 23 is fixed to the first support 7.
  • the first support 7 and the second support 23 are separated by the pulley 2 and by the cam 5.
  • the cam 5 is mounted fixed on the support 7.
  • the first pin 8 is surrounded by one or more bearings 24 which makes it possible to improve the sliding in the first groove 6.
  • the axis of rotation A is advantageously defined by a shaft 25.
  • the shaft 25 has a first through hole which aligns with a first through hole of the support 7 in order to insert a second shaft 26 forming the second axis of rotation B
  • the second support 23 has a first hole which aligns with the first hole in the shaft 25 which makes it possible to fix the rotation shaft 25, the first support 7 and the second support 23 by means of the second shaft 26.
  • the shaft 25 also comprises a second through hole which aligns with a second through hole of the support 7 and possibly a second through hole of the second support 23.
  • the second through holes are crossed by a second rod forming the pin 10. The use of two series of through holes ensures that the movement applied to the support 7 results in the same movement on the shaft 25 and therefore on the first axis of rotation as well as on the cam 5.
  • the shaft 25 is separated from the support 7 by a bearing 27 which improves the rotation of the shaft 25 relative to the support 7 and therefore improves the rotation of the pulley 2 by support 7.
  • the pulley 2 is of circular section and has a groove for the passage of the rope 4.
  • the pulley 2 is in the form of a ring in order to install the first axis of rotation A in the center of the pulley 2.
  • the pulley advantageously defines a toothed wheel 13.
  • the toothed wheel 13 cooperates with blockers 14 which are installed on the shaft 25 as well as with springs 15 which press on the blockers 14, to shift the blockers 14 outwards and the teeth of the toothed wheel 13.
  • the pulley 2 is rotatably mounted by means of a bearing 21, for example a ball bearing which is inserted between the pulley 2 and the shaft 25.
  • the shaft 25 defines the first axis of rotation A and the bearing 21 makes it possible to facilitate the rotation of the pulley 2 relative to the shaft 25.
  • the use of the descender 1 can be described as follows.
  • a self-locking descender 1 according to one of the multiple embodiments described above is provided.
  • the rope 4 is installed in the descender 1 between the pulley and the side wall 3a.
  • the user pulls on the first strand of the rope 4 which allows the pulley 2 to rotate in a first direction of rotation +.
  • the load attached to the second strand of the rope 4 is lifted.
  • the second strand of rope 4 is pulled to rotate the pulley 2 in the second direction of rotation - which causes blocking of the pulley 2.
  • the pulley 2 moves towards a side wall until the rope blocks 4.
  • the force applied to the second strand of rope causes the support 7 to move, here a rotation movement with a rotation movement of the cam 5.
  • the spring 11 moves the support 7 towards the blocking position so that the descender 1 blocks the rope 4 by default.
  • the pulley 2 moves so as to unlock the rope 4 and facilitate the rotation of the pulley 2 and therefore the efficiency when raising the load present on the second strand rope 4.
  • the handle is rotatably mounted around a shaft 28 which defines an axis of rotation C.

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pulleys (AREA)
  • Clamps And Clips (AREA)
  • Emergency Lowering Means (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)

Abstract

Le descendeur autobloquant (1) à poulie (2) comporte :• un premier flasque (3) muni d'une paroi latérale (3a) définissant un chemin de circulation de corde (4),• une poulie (2) rotative par rapport au premier flasque (3) autour d'un premier axe de rotation (A), la poulie (2) tournant uniquement selon un premier sens de rotation (+) autour du premier axe de rotation (A).Le premier axe de rotation (A) est monté mobile par rapport à la paroi latérale (3a) du premier flasque (3) de manière à définir une première position et une deuxième position présentant des distances différentes vis-à-vis de la paroi latérale (3a) du premier flasque (3). Le blocage de la poulie (2) selon le second sens de rotation (-) entraine le déplacement du premier axe de rotation (A) et la poulie (2) en direction de la paroi latérale du premier flasque (3) jusqu'à une position seuil.The self-locking descender (1) with pulley (2) comprises: • a first flange (3) provided with a side wall (3a) defining a rope circulation path (4), • a pulley (2) rotatable relative to the first flange (3) around a first axis of rotation (A), the pulley (2) rotating only in a first direction of rotation (+) around the first axis of rotation (A) .The first axis of rotation (A ) is mounted movable relative to the side wall (3a) of the first flange (3) so as to define a first position and a second position having different distances from the side wall (3a) of the first flange ( 3). The blocking of the pulley (2) according to the second direction of rotation (-) causes the displacement of the first axis of rotation (A) and the pulley (2) in the direction of the side wall of the first flange (3) up to a threshold position.

Description

Domaine technique de l'inventionTechnical field of the invention

L'invention est relative à un descendeur autobloquant à poulie dont le fonctionnement est amélioré et plus particulièrement à un descendeur autobloquant à poulie capable de supporter des charges importantes sous la forme d'une poulie autobloquante.The invention relates to a self-locking pulley descender whose operation is improved and more particularly to a self-locking pulley descender capable of supporting large loads in the form of a self-blocking pulley.

État de la techniqueState of the art

En alpinisme et dans d'autres activités de montagne, il est courant de posséder une poulie bloqueuse qui peut être utilisée en cas de chute en crevasse ou pour soulever toute charge lourde. Une telle poulie bloqueuse doit posséder un bon rendement lorsqu'elle est utilisée en tant que poulie ainsi qu'une bonne capacité à bloquer la corde. Enfin, la poulie bloqueuse doit avoir un poids et un encombrement réduits car l'équipement se trouve à demeure dans le sac et est utilisé très rarement.In mountaineering and other mountain activities, it is common to have a blocking pulley which can be used in the event of a fall into a crevasse or to lift any heavy load. Such a blocking pulley must have a good yield when used as a pulley as well as a good capacity to block the rope. Finally, the blocking pulley must have a reduced weight and size because the equipment is permanently in the bag and is used very rarely.

Dans les domaines professionnels, et notamment en secours, il est également nécessaire de posséder une poulie bloqueuse. Les contraintes d'utilisation sont différentes car la poulie est utilisée plus régulièrement sur des charges beaucoup plus importantes. Par ailleurs, lors d'un secours, il est particulièrement intéressant d'avoir en plus la possibilité de descendre une victime qui a préalablement été montée. Il est alors avantageux d'utiliser un descendeur autobloquant à poulie.In the professional fields, and in particular in rescue, it is also necessary to have a blocking pulley. The constraints of use are different because the pulley is used more regularly on much larger loads. In addition, during a rescue, it is particularly interesting to have in addition the possibility of lowering a victim who has previously been mounted. It is therefore advantageous to use a self-locking pulley descender.

Dans ces conditions, l'utilisation d'une poulie bloqueuse telle que celle présentée dans le document US 9,120,654 n'est pas adaptée.In these conditions, the use of a blocking pulley such as that presented in the document US 9,120,654 is not suitable.

Pour une utilisation professionnelle, il est connu d'utiliser un descendeur à poulie commercialisé sous la dénomination « MAESTRO » par la demanderesse. Un tel descendeur comporte une poulie configurée pour ne tourner que dans un seul sens autour de son axe de rotation. Le descendeur comporte également une came rotative qui est configurée pour bloquer la corde lorsque le déplacement de la corde est destiné à générer une rotation de la poulie selon le second sens de rotation.For professional use, it is known to use a pulley descender marketed under the name "MAESTRO" by the applicant. Such a descender comprises a pulley configured to rotate only in one direction around its axis of rotation. The descender also includes a rotary cam which is configured to lock the rope when the movement of the rope is intended to generate a rotation of the pulley in the second direction of rotation.

Dans cette configuration, la came est en contact permanent ou quasi-permanent avec la corde de sorte que le déplacement de la corde pour générer le second sens de rotation de la poulie entraine la rotation de la came vers une position de blocage. Les inventeurs se sont aperçus que la rapidité du blocage évolue de façon non négligeable avec la qualité de surface de la corde ainsi qu'avec la température du descendeur.In this configuration, the cam is in permanent or almost permanent contact with the rope so that the movement of the rope to generate the second direction of rotation of the pulley causes the rotation of the cam towards a locking position. The inventors have noticed that the speed of blocking changes significantly with the surface quality of the rope as well as with the temperature of the descender.

Un constat identique peut être tiré de la poulie avec descendeur commercialisée par la société CMC sous la dénomination CSR2 PULLEYS et présentée dans le document US 7,419,138 . Cette solution n'est pas adaptée car elle ne permet pas de soutenir des contraintes importantes sur la corde de sorte qu'un glissement peut se produire qui génère un échauffement de la poulie et donc un abaissement du coefficient de frottement entre la poulie et la corde.An identical observation can be drawn from the pulley with descender marketed by the company CMC under the name CSR2 PULLEYS and presented in the document US 7,419,138 . This solution is not suitable because it does not support significant stresses on the rope so that a slip can occur which generates a heating of the pulley and therefore a lowering of the coefficient of friction between the pulley and the rope .

Il apparaît également que le dispositif commercialisé par la société CMC sous la dénomination MPD™ Multi Purpose Device ne fournit pas un résultat satisfaisant. Un tel produit est présenté dans le document US 7,658,264 et possède une poulie montée mobile autour d'un axe de rotation. La poulie est associée à une came également montée mobile autour de l'axe de rotation. La poulie est configurée de manière à n'autoriser qu'un seul sens de rotation. Lorsqu'une traction sur un brin de corde est appliquée selon le second sens de rotation, cela entraine le blocage de la poulie. Les frottements entre la corde et la poulie causent la rotation de la poulie jusqu'au coincement de la corde au moyen de la came. Il est nécessaire d'avoir un frottement suffisant afin de contrer l'effort fourni par un ressort de résistance qui place la came dans une position empêchant tout blocage de la corde. Comme indiqué dans le document US 7,658,264 , le blocage de la corde est fortement dépendant des frottements entre la corde et la poulie ce qui entraine une grande variabilité de la qualité du blocage selon l'état d'usure de la corde et de la poulie.It also appears that the device marketed by CMC under the name MPD ™ Multi Purpose Device does not provide a satisfactory result. Such a product is presented in the document US 7,658,264 and has a pulley mounted movable about an axis of rotation. The pulley is associated with a cam also mounted mobile around the axis of rotation. The pulley is configured so as to allow only one direction of rotation. When a pull on a strand of rope is applied in the second direction of rotation, this causes the blocking of the pulley. Friction between the rope and the pulley cause the pulley to rotate until the rope is jammed by the cam. It is necessary to have sufficient friction in order to counter the force provided by a resistance spring which places the cam in a position preventing any blocking of the rope. As stated in the document US 7,658,264 , the blocking of the rope is highly dependent on the friction between the rope and the pulley, which results in great variability in the quality of the blocking depending on the state of wear of the rope and the pulley.

Objet de l'inventionSubject of the invention

Un objet de l'invention a pour but de remédier à ces inconvénients en proposant une poulie autobloquante qui améliore le blocage de la corde, notamment au moyen d'une configuration dans laquelle l'évolution du coefficient de frottement présente une importance moindre dans le blocage de la corde.An object of the invention aims to remedy these drawbacks by proposing a self-locking pulley which improves the blocking of the rope, in particular by means of a configuration in which the evolution of the coefficient of friction has less importance in blocking. rope.

A cet effet, la poulie autobloquante comporte :

  • un premier flasque muni d'une paroi latérale définissant une zone de blocage de corde,
  • une came mobile en rotation par rapport au premier flasque de manière à se rapprocher ou s'éloigner de la zone de blocage de corde,
  • une poulie destinée à venir en contact de la corde et montée rotative par rapport au premier flasque autour d'un premier arbre définissant un premier axe de rotation, la poulie étant configurée pour tourner uniquement selon un premier sens de rotation autour du premier axe de rotation et empêcher la rotation dans le second sens de rotation autour dudit premier axe de rotation, la came faisant saillie de la poulie.
For this purpose, the self-locking pulley includes:
  • a first flange provided with a side wall defining a rope blocking zone,
  • a cam movable in rotation relative to the first flange so as to approach or move away from the rope blocking zone,
  • a pulley intended to come into contact with the rope and rotatably mounted with respect to the first flange around a first shaft defining a first axis of rotation, the pulley being configured to rotate only in a first direction of rotation around the first axis of rotation and preventing rotation in the second direction of rotation about said first axis of rotation, the cam protruding from the pulley.

La poulie autobloquante est remarquable en ce que :

  • le premier arbre est monté mobile par rapport à la zone de blocage pour déplacer le premier axe de rotation,
  • la came est montée rotative autour d'un deuxième axe de rotation défini par un deuxième arbre différent du premier arbre de sorte que la position de la came par rapport à la zone de blocage est liée à la position du premier arbre, et
  • le premier axe de rotation est décalé du deuxième axe de rotation de sorte que l'application d'un effort sur la corde pour faire tourner la poulie selon le premier sens de rotation génère une force visant à éloigner la came de la zone de blocage et l'application d'un effort sur la corde pour faire tourner la poulie selon le second sens de rotation génère une force visant à rapprocher la came de la zone de blocage.
The self-locking pulley is remarkable in that:
  • the first shaft is mounted movable relative to the blocking zone to move the first axis of rotation,
  • the cam is rotatably mounted around a second axis of rotation defined by a second shaft different from the first shaft so that the position of the cam relative to the blocking zone is linked to the position of the first shaft, and
  • the first axis of rotation is offset from the second axis of rotation so that the application of a force on the rope to rotate the pulley in the first direction of rotation generates a force aimed at moving the cam away from the blocking zone and the application of a force on the rope to rotate the pulley in the second direction of rotation generates a force aimed at bringing the cam closer to the blocking zone.

Avantageusement, un ressort est agencé pour appliquer une force déplaçant la came vers la zone de blocage de corde. Dans un mode de réalisation préférentiel, le ressort est agencé pour déplacer le premier axe de rotation vers une première position. L'application d'une force sur la corde pour obtenir la rotation de la poulie selon le premier sens de rotation déplace le premier axe de rotation pour s'éloigner de la première positionAdvantageously, a spring is arranged to apply a force moving the cam towards the rope blocking zone. In a preferred embodiment, the spring is arranged to move the first axis of rotation to a first position. The application of a force on the rope to obtain the rotation of the pulley according to the first direction of rotation moves the first axis of rotation to move away from the first position

Dans un développement, le premier axe de rotation est monté mobile en rotation par rapport au premier flasque autour du deuxième axe de rotation, le premier axe de rotation étant mobile selon le premier sens de rotation et le second sens de rotation par rapport au deuxième axe de rotation, le blocage de la poulie selon le second sens de rotation entrainant le déplacement du premier axe de rotation et de la poulie selon le second sens de rotation autour du deuxième axe de rotation.In a development, the first axis of rotation is mounted mobile in rotation relative to the first flange around the second axis of rotation, the first axis of rotation being mobile according to the first direction of rotation and the second direction of rotation relative to the second axis of rotation, the blocking of the pulley in the second direction of rotation causing the displacement of the first axis of rotation and of the pulley in the second direction of rotation around the second axis of rotation.

Préférentiellement, le premier axe de rotation est décalé du deuxième axe de rotation de sorte que l'application d'une contrainte sur la corde pour faire tourner la poulie selon le premier sens de rotation génère un moment visant à décaler la came de la zone de blocage et que la disparition de ladite contrainte cause le déplacement de la came vers la zone de blocage.Preferably, the first axis of rotation is offset from the second axis of rotation so that the application of a stress on the rope to rotate the pulley in the first direction of rotation generates a moment aimed at shifting the cam from the area of blocking and that the disappearance of said constraint causes the displacement of the cam towards the blocking zone.

Dans un mode de réalisation préférentiel, lorsque la poulie se meut selon le premier sens de rotation, la poulie se trouve dans une première position qui est plus éloignée de la zone de blocage de corde qu'une deuxième position représentative d'un blocage de la corde.In a preferred embodiment, when the pulley moves in the first direction of rotation, the pulley is in a first position which is further from the rope blocking area than a second position representative of a blocking of the rope.

Avantageusement, la rotation de la poulie et du premier axe de rotation selon le second sens de rotation entrainent la rotation de la came autour du deuxième axe de rotation pour rapprocher la came de la zone de blocage.Advantageously, the rotation of the pulley and of the first axis of rotation in the second direction of rotation cause the rotation of the cam around the second axis of rotation to bring the cam closer to the blocking zone.

Il est avantageux de prévoir que la came soit montée fixe sur le deuxième axe de rotation ou sur le premier axe de rotation.It is advantageous to provide that the cam is mounted fixed on the second axis of rotation or on the first axis of rotation.

De manière préférentielle, le premier flasque comporte une première rainure. La poulie et le deuxième axe de rotation sont montés sur un support associé à un premier pion passant au travers de la première rainure. Le déplacement du premier pion le long de la première rainure entraine la rotation du support selon le premier sens de rotation. Le descendeur est muni d'une poignée comportant une butée agencée pour venir en contact du premier pion, la rotation de la poignée selon le premier sens de rotation entraine la rotation du premier pion selon le premier sens de rotation.Preferably, the first flange has a first groove. The pulley and the second axis of rotation are mounted on a support associated with a first pin passing through the first groove. The movement of the first pin along the first groove causes the support to rotate in the first direction of rotation. The descender is provided with a handle comprising a stop arranged to come into contact with the first pin, the rotation of the handle in the first direction of rotation causes the rotation of the first pin in the first direction of rotation.

Il est également possible de prévoir que le premier flasque comporte une deuxième rainure. Le support est associé à un deuxième pion passant au travers de la deuxième rainure, un ressort étant fixé au premier flasque pour déplacer le deuxième pion selon le second sens de rotation.It is also possible to provide that the first flange has a second groove. The support is associated with a second pin passing through the second groove, a spring being fixed to the first flange to move the second pin in the second direction of rotation.

Dans un autre mode de réalisation, le ressort est monté autour du deuxième axe de rotation.In another embodiment, the spring is mounted around the second axis of rotation.

Préférentiellement, la poulie comporte une roue crantée associée à au moins un bloqueur et à un ressort de blocage. La roue crantée, le au moins un bloqueur et le ressort de blocage sont agencés pour autoriser la rotation de la poulie selon le premier sens de rotation et empêcher la rotation selon le second sens de rotation.Preferably, the pulley comprises a toothed wheel associated with at least one blocker and a blocking spring. The toothed wheel, the at least one blocker and the blocking spring are arranged to allow rotation of the pulley in the first direction of rotation and to prevent rotation in the second direction of rotation.

Dans un mode de réalisation préférentiel, la poulie comporte une pluralité de méplats agencés dans une gorge de la poulie de manière à définir des rétrécissements dans la gorge.In a preferred embodiment, the pulley has a plurality of flats arranged in a groove of the pulley so as to define narrowing in the groove.

L'invention a également pour objet un procédé de blocage d'une corde dans une poulie autobloquante. Le procédé permet un blocage facilité de la corde dans la poulie autobloquante en réduisant la dépendance au coefficient de frottement qui existe entre la corde et la poulie autobloquante .The invention also relates to a method of blocking a rope in a self-locking pulley. The method allows easier blocking of the rope in the self-blocking pulley by reducing the dependence on the coefficient of friction which exists between the rope and the self-blocking pulley.

Le procédé de blocage est remarquable en ce qu'il comporte :

  • fournir une poulie autobloquante selon l'un des modes de réalisation précédents avec une poulie montée mobile sur un premier flasque et une came,
  • installer une corde dans la poulie autobloquante ,
  • tirer sur la corde de manière à faire tourner la poulie selon un premier sens de rotation, l'axe de rotation de la poulie se déplaçant selon une première direction,
  • tirer sur la corde pour faire tourner la poulie selon un second sens de rotation et causer le blocage de la poulie, la came se déplaçant en direction d'une paroi latérale jusqu'au blocage de la corde, l'axe de rotation de la poulie se déplaçant selon une seconde direction opposée à la première direction.
The blocking process is remarkable in that it includes:
  • supplying a self-locking pulley according to one of the preceding embodiments with a pulley mounted movably on a first flange and a cam,
  • install a rope in the self-locking pulley,
  • pull the rope so as to rotate the pulley in a first direction of rotation, the axis of rotation of the pulley moving in a first direction,
  • pull on the rope to rotate the pulley in a second direction of rotation and cause the blocking of the pulley, the cam moving towards a side wall until the blocking of the rope, the axis of rotation of the pulley moving in a second direction opposite to the first direction.

Description sommaire des dessinsBrief description of the drawings

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre de modes particuliers de réalisation de l'invention donnés à titre d'exemples non limitatifs et représentés aux dessins annexés, dans lesquels :

  • la figure 1 illustre, de façon schématique, en perspective, un descendeur autobloquant fermé avec une corde installée,
  • la figure 2 illustre, de façon schématique, en perspective, un descendeur autobloquant ouvert avec une corde installée,
  • la figure 3 illustre, de façon schématique, en vue de face, un mode de réalisation dans lequel la came est en position de glissement, le deuxième flasque étant absent,
  • la figure 4 illustre, de façon schématique, en vue de face, un mode de réalisation dans lequel la came est en position de blocage,
  • la figure 5 illustre de façon schématique, en coupe, un mode de réalisation dans lequel la came est en position de blocage, la coupe étant réalisée dans l'épaisseur de la poulie,
  • la figure 6 illustre de façon schématique, en vue arrière et en coupe, un mode de réalisation dans lequel la came est en position de blocage, la coupe étant réalisée dans l'épaisseur de la poignée,
  • la figure 7 illustre de façon schématique, en vue arrière et en coupe, un mode de réalisation dans lequel la came est en position autorisant un glissement de la corde, la coupe étant réalisée dans l'épaisseur de la poignée,
  • la figure 8 illustre de façon schématique, une vue éclatée de l'installation d'une poulie et d'une came sur un support.
Other advantages and characteristics will emerge more clearly from the description which follows of particular embodiments of the invention given by way of nonlimiting examples and represented in the appended drawings, in which:
  • the figure 1 illustrates, schematically, in perspective, a self-locking descender closed with an installed rope,
  • the figure 2 illustrates, schematically, in perspective, a self-locking descender opened with a rope installed,
  • the figure 3 illustrates, schematically, in front view, an embodiment in which the cam is in the sliding position, the second flange being absent,
  • the figure 4 illustrates schematically, in front view, an embodiment in which the cam is in the locking position,
  • the figure 5 schematically illustrates, in section, an embodiment in which the cam is in the locking position, the section being made in the thickness of the pulley,
  • the figure 6 schematically illustrates, in rear view and in section, an embodiment in which the cam is in the locking position, the section being made in the thickness of the handle,
  • the figure 7 illustrates schematically, in rear view and in section, an embodiment in which the cam is in a position allowing the rope to slide, the cut being made in the thickness of the handle,
  • the figure 8 schematically illustrates an exploded view of the installation of a pulley and a cam on a support.

Description détailléedetailed description

Les figures 1 et 2 représentent des vues en perspective d'un descendeur autobloquant 1 à poulie 2. Le descendeur autobloquant 1 possède un premier flasque 3 muni d'une paroi latérale 3a définissant un chemin de circulation d'une corde 4 à l'intérieur du descendeur 1. Le descendeur définit deux orifices d'entrée/sortie de la corde dans le descendeur 1. La corde entre dans le descendeur par un premier orifice passe sur la poulie 2 et ressort du descendeur par le deuxième orifice. La corde est divisée en un premier brin et un deuxième brin selon que l'on se trouve d'un côté ou de l'autre de la poulie 2. Comme illustré aux figures 1 et 2, le descendeur possède un chemin de circulation qui est destiné à recevoir la corde 4. En fonctionnement, la corde 4 se déplace à l'intérieur du chemin de circulation de corde. Le chemin de circulation de corde possède une paroi de support qui réalise la connexion mécanique avec la corde 4. Lorsque la corde est sous tension, elle appuie sur la paroi de support ce qui applique un effort sur le descendeur.The figures 1 and 2 represent perspective views of a self-locking descender 1 with pulley 2. The self-locking descender 1 has a first flange 3 provided with a side wall 3a defining a circulation path of a rope 4 inside the descender 1. The descender defines two entry / exit holes for the rope in the descender 1. The rope enters the descender through a first opening passes over the pulley 2 and exits the descender through the second opening. The rope is divided into a first strand and a second strand depending on whether one is on one side or the other of the pulley 2. As illustrated in figures 1 and 2 , the descender has a circulation path which is intended to receive the rope 4. In operation, the rope 4 moves inside the rope circulation path. The rope circulation path has a support wall which makes the mechanical connection with the rope 4. When the rope is under tension, it presses on the support wall which applies a force to the descender.

La figure 1 représente un descendeur fermé alors que la figure 2 représente un descendeur ouvert. L'ouverture du descendeur 1 permet d'installer ou de retirer la corde 4. La fermeture du descendeur 1 permet de maintenir la corde 4 dans le descendeur 1.The figure 1 represents a closed descender while the figure 2 represents an open descender. Opening the descender 1 allows the rope 4 to be installed or removed. Closing the descender 1 keeps the rope 4 in the descender 1.

Le descendeur 1 possède une poulie 2 qui est montée rotative par rapport au premier flasque 3. La poulie 2 tourne autour d'un premier axe de rotation A. La poulie 2 est montée sur un premier arbre 25 qui définit le premier axe de rotation A. L'arbre 25 est illustré en figure 8 par exemple.The descender 1 has a pulley 2 which is rotatably mounted relative to the first flange 3. The pulley 2 rotates around a first axis of rotation A. The pulley 2 is mounted on a first shaft 25 which defines the first axis of rotation A The tree 25 is illustrated in figure 8 for example.

La poulie 2 est configurée pour ne tourner que dans un seul sens de rotation. En d'autres termes, la poulie 2 présente une autorotation et elle est configurée pour tourner selon un premier sens de rotation noté + et elle configurée pour être bloquée lorsque l'on souhaite réaliser une rotation selon le second sens de rotation noté - et opposé au premier sens de rotation.Pulley 2 is configured to rotate only in one direction of rotation. In other words, the pulley 2 has an autorotation and it is configured to rotate according to a first direction of rotation noted + and it configured to be blocked when it is desired to perform a rotation according to the second direction of rotation noted - and opposite at the first direction of rotation.

De cette manière, lorsque l'utilisateur tire sur un premier brin de la corde 4, la poulie 2 tourne selon le premier sens de rotation. Au contraire, lorsque l'utilisateur tire le deuxième brin de la corde 4, la poulie 2 se bloque. En plus d'être montée mobile en rotation autour du premier axe de rotation A, la poulie 2 est également montée mobile par rapport au premier flasque 3 pour se déplacer entre des première et deuxième positions.In this way, when the user pulls on a first strand of the rope 4, the pulley 2 rotates according to the first direction of rotation. On the contrary, when the user pulls the second strand of the rope 4, the pulley 2 is blocked. More to be mounted movable in rotation around the first axis of rotation A, the pulley 2 is also mounted movable relative to the first flange 3 to move between first and second positions.

La figure 3 représente la poulie 2 dans la première position alors que la figure 4 représente la poulie 2 dans la deuxième position. La deuxième position est plus proche de la paroi latérale 3a que la première position ce qui permet de définir une position de blocage de la corde. La première position autorise un glissement de la corde 4 par rapport au descendeur 1 selon une configuration équivalente à une rotation de la poulie selon le second sens de rotation. La poulie 2 étant boquée selon le second sens de rotation, le mouvement de la corde 4 se fait par glissement.The figure 3 represents the pulley 2 in the first position while the figure 4 represents the pulley 2 in the second position. The second position is closer to the side wall 3a than the first position, which makes it possible to define a position for blocking the rope. The first position allows the rope 4 to slide relative to the descender 1 in a configuration equivalent to a rotation of the pulley in the second direction of rotation. The pulley 2 being locked in the second direction of rotation, the movement of the rope 4 is done by sliding.

Lorsque le deuxième brin de corde 4 est tiré (brin à droite sur les figures 3 et 4), la poulie 2 se bloque ce qui cause le déplacement de la poulie 2 vers la deuxième position et cause le blocage de la corde 4. En alternative, lorsque le deuxième brin de corde 4 est tiré, un effort supplémentaire est appliqué pour bloquer la corde 4.When the second strand of rope 4 is pulled (strand to the right on the figures 3 and 4 ), the pulley 2 is blocked which causes the pulley 2 to move to the second position and causes the rope to be blocked 4. Alternatively, when the second strand of rope 4 is pulled, an additional force is applied to lock the rope 4.

Ce mode de réalisation est particulièrement avantageux car la corde 4 est en contact direct avec la poulie 2 ce qui augmente la surface de contact utilisée pour se déplacer vers la position de blocage. La surface de contact accrue entre la poulie 2 et la corde 4 facilite le déplacement de la poulie 2 vers la position de blocage. La poulie 2 étant fixe car dans l'impossibilité de tourner selon le second sens de rotation, le frottement de la corde 4 sur la poulie 2 est utilisé pour atteindre la position seuil de blocage.This embodiment is particularly advantageous because the rope 4 is in direct contact with the pulley 2 which increases the contact surface used to move towards the blocking position. The increased contact surface between the pulley 2 and the rope 4 facilitates the displacement of the pulley 2 towards the locking position. The pulley 2 being fixed because in the impossibility of turning in the second direction of rotation, the friction of the rope 4 on the pulley 2 is used to reach the threshold blocking position.

Dans les configurations de l'art antérieur, la poulie est uniquement montée mobile en rotation autour de son axe de rotation de sorte que la tension appliquée sur le deuxième brin de la corde bloque la poulie. Une fois la poulie bloquée, le déplacement de la corde génère une force de frottement s'opposant à la force appliquée par un ressort pour déplacer une came et atteindre la position de blocage de la corde. La came ayant une surface réduite, il est plus difficile d'atteindre un frottement suffisant de la corde sur la came pour que la came atteigne la position de blocage. Il est aussi difficile d'avoir un frottement suffisant entre la corde et la poulie pour contrer l'effet du ressort et assurer le déclenchement adéquat du blocage. Si la force générée par le ressort est trop faible cela peut bloquer la corde inopinément. Il est également connu d'avoir une configuration sans came avec la poulie qui intervient dans le blocage de la corde. Dans cette dernière configuration, le blocage est limité car le déplacement de l'axe de rotation poulie est obligatoirement faible. Cette dernière solution ne permet pas de produire des forces de blocage importantes et est fortement dépendante de la qualité du contact entre la corde et la poulie.In the configurations of the prior art, the pulley is only mounted movable in rotation about its axis of rotation so that the tension applied to the second strand of the rope blocks the pulley. Once the pulley is blocked, the movement of the rope generates a friction force opposing the force applied by a spring to move a cam and reach the blocking position of the rope. Since the cam has a reduced surface, it is more difficult to achieve sufficient friction of the rope on the cam for the cam to reach the locking position. It is also difficult to have sufficient friction between the rope and the pulley to counter the effect of the spring and ensure adequate release of the blockage. If the force generated by the spring is too weak it can unexpectedly block the rope. It is also known to have a configuration without cam with the pulley which intervenes in the blocking of the rope. In this latter configuration, the blocking is limited because the displacement of the pulley axis of rotation is necessarily small. This latter solution does not produce significant blocking forces and is highly dependent on the quality of the contact between the rope and the pulley.

Le mouvement de la poulie 2 peut être quelconque pour atteindre la position seuil de blocage. Il est possible d'utiliser un mouvement en translation, un mouvement un rotation ou encore une combinaison de ces deux mouvements. De manière particulièrement avantageuse, un mouvement en rotation est préféré car il permet de mieux gérer l'effort appliqué sur la poulie 2 au regard de la tension présente dans la corde 4.The movement of the pulley 2 can be any to reach the threshold blocking position. It is possible to use a movement in translation, a movement a rotation or a combination of these two movements. In a particularly advantageous manner, a rotational movement is preferred since it makes it possible to better manage the force applied to the pulley 2 with regard to the tension present in the rope 4.

Dans le mode de réalisation illustré, le premier axe de rotation A est monté mobile en rotation par rapport au premier flasque 3 autour d'un deuxième axe de rotation B différent du premier axe de rotation A. Le premier axe de rotation A est mobile selon le premier sens de rotation + et selon le second sens de rotation - par rapport au deuxième axe de rotation B. Le blocage de la poulie 2 selon le second sens de rotation - entraine le déplacement du premier axe de rotation A et de la poulie 2 selon le second sens de rotation autour du deuxième axe de rotation B de sorte que la distance entre la poulie et la paroi latérale 3a du premier flasque 1 diminue jusqu'à la position seuil où le blocage intervient. A l'inverse, la rotation de la poulie 2 peut entrainer un déplacement du premier axe de rotation A pour s'éloigner d'une position de blocage de la corde 4.In the illustrated embodiment, the first axis of rotation A is mounted mobile in rotation relative to the first flange 3 around a second axis of rotation B different from the first axis of rotation A. The first axis of rotation A is mobile according to the first direction of rotation + and according to the second direction of rotation - relative to the second axis of rotation B. The blocking of the pulley 2 according to the second direction of rotation - causes the displacement of the first axis of rotation A and of the pulley 2 according to the second direction of rotation around the second axis of rotation B so that the distance between the pulley and the side wall 3a of the first flange 1 decreases to the threshold position where blocking occurs. Conversely, the rotation of the pulley 2 can cause displacement of the first axis of rotation A to move away from a rope locking position 4.

Pour gagner en efficacité lors de la rotation de la poulie, lorsque la poulie 2 se meut selon le premier sens de rotation +, la poulie 2 se trouve hors de la deuxième position et de préférence dans la première position qui est plus éloignée de la paroi latérale 3a que la deuxième position. Ainsi, lors de la rotation de la poulie 2, la corde 4 ne doit pas vaincre une force de frottement élevée ce qui permet de maintenir un rendement élevé lors du tirage d'une charge fixée au deuxième brin. Comme illustré aux figures 1 et 2, la paroi de support du chemin de circulation est exclusivement formée par la poulie ce qui permet d'éviter les zones de frottement de la corde. Lorsque le brin gauche (figure 3) de la corde est tiré pour s'éloigner de la poulie, une portion de corde 4 du brin droit s'introduit dans le descendeur pour venir en contact de la poulie. La poulie 2 tourne pour déplacer la portion de corde jusqu'à ce que la portion de corde sorte du descendeur 1. Lors de son déplacement dans le descendeur, la portion de corde s'est trouvée uniquement en contact avec la poulie ce qui limite le frottement de la corde à l'intérieur du descendeur. Comme illustré sur les différentes figures, la paroi de support du chemin de circulation définit un demi-cercle qui est formé par la poulie 2 ce qui augmente la qualité du contact entre la corde et la poulie. La poulie assure la reprise d'effort dans la première position et la deuxième position du support 7. La poulie définit un chemin de circulation de corde avec un demi-cercle dont le rayon de courbure correspond au rayon de la poulie dans sa gorge.To gain efficiency during the rotation of the pulley, when the pulley 2 moves in the first direction of rotation +, the pulley 2 is outside the second position and preferably in the first position which is further from the wall lateral 3a than the second position. Thus, during the rotation of the pulley 2, the rope 4 must not overcome a high frictional force which allows to maintain a high yield when drawing a load fixed to the second strand. As illustrated in figures 1 and 2 , the support wall of the circulation path is exclusively formed by the pulley which avoids areas of friction of the rope. When the left strand ( figure 3 ) of the rope is pulled away from the pulley, a portion of rope 4 of the right strand is introduced into the descender to come into contact with the pulley. Pulley 2 rotates to move the portion of rope until the portion of rope exits descender 1. During its movement in the descender, the portion of rope was found only in contact with the pulley which limits the friction of the rope inside the descender. As illustrated in the various figures, the support wall of the circulation path defines a semicircle which is formed by the pulley 2 which increases the quality of the contact between the rope and the pulley. The pulley ensures the recovery of force in the first position and the second position of the support 7. The pulley defines a path for circulation of the rope with a semicircle whose radius of curvature corresponds to the radius of the pulley in its groove.

La paroi interne du chemin de circulation définit un demi-cercle qui correspond à la moitié de la poulie. Le poids de la charge à supporter est repris intégralement par la poulie et la corde 4 peut circuler dans le descendeur en suivant la rotation de la poulie selon un demi-cercle ce qui évite la formation de zones de glissement et donc de zones de frottement. Le chemin de circulation définit un demi-cercle au moyen de la poulie. La corde est en contact de la poulie sur la moitié de la poulie. De manière avantageuse, la paroi externe de la poulie est dépourvue de recouvrement par la came sur plus de la moitié du périmètre de la poulie ce qui permet d'avoir une reprise d'effort quasi-intégrale par la poulie. La reprise d'effort par la poulie intervient quelle que soit la position de la poulie entre la première position et la deuxième position.The internal wall of the circulation path defines a semicircle which corresponds to half of the pulley. The weight of the load to be supported is taken up entirely by the pulley and the rope 4 can circulate in the descender by following the rotation of the pulley in a semicircle which avoids the formation of sliding zones and therefore of friction zones. The circulation path defines a semicircle by means of the pulley. The rope is in pulley contact on half of the pulley. Advantageously, the external wall of the pulley is devoid of overlap by the cam over more than half of the perimeter of the pulley, which makes it possible to have an almost complete force recovery by the pulley. The resumption of force by the pulley occurs regardless of the position of the pulley between the first position and the second position.

En comparaison, le document US 2014/0262611 propose une configuration avec une came mobile dont une partie de la paroi de support est formée par une poulie de manière à moduler la force de frottement selon la vitesse de translation de la corde. Le reste de la paroi de support est formé par une zone de frottement présente de part et d'autre d'un diamètre de la poulie pour assurer le frottement entre la corde et le système de blocage. Lorsque la vitesse de translation est importante, la poulie se bloque ce qui augmente le frottement et cause la rotation de la came.In comparison, the document US 2014/0262611 proposes a configuration with a movable cam of which a part of the support wall is formed by a pulley so as to modulate the frictional force according to the speed of translation of the rope. The rest of the support wall is formed by a friction zone present on either side of a diameter of the pulley to ensure friction between the rope and the locking system. When the speed of translation is important, the pulley locks which increases the friction and causes the rotation of the cam.

Le descendeur 1 possède une came 5 ou patin pour assurer le blocage de la corde 4 contre la paroi latérale 3a du premier flasque 3. La rotation de la poulie 2 et du premier axe de rotation A selon le second sens de rotation cause l'apparition d'une force qui induit la rotation de la came 5 autour du deuxième axe de rotation B avec une diminution de la distance entre la came 5 et la zone de blocage jusqu'à la position seuil représentative du blocage de la corde. La rotation de la poulie 2 autour du premier axe de rotation A selon le premier sens de rotation cause l'apparition d'une force qui induit la rotation de la came 5 autour du deuxième axe de rotation B avec une augmentation de la distance entre la came 5 et la zone de blocage pour quitter la position de blocage de la corde 4.The descender 1 has a cam 5 or shoe for blocking the rope 4 against the side wall 3a of the first flange 3. The rotation of the pulley 2 and of the first axis of rotation A according to the second direction of rotation causes the appearance of a force which induces the rotation of the cam 5 around the second axis of rotation B with a decrease in the distance between the cam 5 and the blocking zone up to the threshold position representative of the blocking of the rope. The rotation of the pulley 2 around the first axis of rotation A in the first direction of rotation causes the appearance of a force which induces the rotation of the cam 5 around the second axis of rotation B with an increase in the distance between the cam 5 and the locking zone to exit the rope locking position 4.

L'utilisation d'une came 5 mobile distincte de la poulie 3 et saillante de la poulie 2 permet d'assurer un meilleur blocage de la corde 4 entre la came 5 et la paroi latérale 3a. Le déplacement de la poulie 2 permet de rapprocher la came 5 de sa position de blocage ce qui facilite l'obtention du blocage de la corde 4. Le déplacement de la poulie 2 permet avantageusement de déplacer la came 5 afin d'augmenter la tension appliquée par la came 5 sur la corde 4 en la rapprochant de la paroi latérale 3a ce qui permet de faciliter l'obtention d'une force de frottement seuil assurant l'autoblocage de la corde 4.The use of a movable cam 5 separate from the pulley 3 and projecting from the pulley 2 ensures better locking of the rope 4 between the cam 5 and the side wall 3a. The movement of the pulley 2 allows the cam to be brought closer 5 from its locking position which facilitates obtaining the blocking of the rope 4. The movement of the pulley 2 advantageously makes it possible to move the cam 5 in order to increase the tension applied by the cam 5 on the rope 4 by bringing it closer of the side wall 3a, which makes it easier to obtain a threshold friction force ensuring the self-locking of the rope 4.

La came 5 est montée mobile en rotation autour d'un deuxième arbre 26 qui définit un deuxième axe de rotation B distinct du premier axe de rotation A. La came 5 est montée rotative autour du deuxième axe de rotation B de sorte que la position de la came 5 par rapport à la zone de blocage soit liée à la position du premier arbre 25.The cam 5 is rotatably mounted around a second shaft 26 which defines a second axis of rotation B distinct from the first axis of rotation A. The cam 5 is rotatably mounted around the second axis of rotation B so that the position of the cam 5 relative to the blocking zone is linked to the position of the first shaft 25.

Comme illustré aux figures 3 et 4, le premier axe de rotation A est décalé du deuxième axe de rotation B de sorte que l'application d'un effort sur la corde 4 pour faire tourner la poulie 2 selon le premier sens de rotation + génère une force visant à éloigner la came 5 de la zone de blocage. L'application d'un effort sur la corde 4 pour faire tourner la poulie 2 selon le second sens de rotation - génère une force visant à rapprocher la came 5 de la zone de blocage.As illustrated in figures 3 and 4 , the first axis of rotation A is offset from the second axis of rotation B so that the application of a force on the rope 4 to rotate the pulley 2 in the first direction of rotation + generates a force aimed at moving the cam away 5 of the blocking zone. The application of a force on the rope 4 to rotate the pulley 2 in the second direction of rotation - generates a force aimed at bringing the cam 5 closer to the blocking zone.

Le décalage entre les deux axes de rotation A et B induit l'apparition d'un couple lorsque le premier brin de corde 4 ou le deuxième brin de corde 4 est tiré. Il est particulièrement avantageux d'utiliser ce couple pour déplacer la came 5 ou générer une force visant au déplacement de la came 5. Comme illustré à la figure 3, les deux axes de rotation sont espacés d'une distance qui est inférieure au rayon de la poulie 2. Le décalage angulaire de l'axe de la poulie et de la came 5 est réduit entre les deux positions ce qui permet d'avoir une reprise d'effort au moyen de la poulie 2 dont la position évolue peu selon le sens de rotation recherché pour la poulie. Au contraire, dans le document US 2014/0262611 , l'axe de rotation du mécanisme de blocage est éloigné de la poulie ce qui impose d'avoir une zone de frottement qui fait la liaison entre la poulie et l'axe de rotation. La configuration proposée est alors plus volumineuse et procure plus de frottement ce qui réduit le rendement lors du tirage du brin de corde qui est non tendu.The offset between the two axes of rotation A and B induces the appearance of a torque when the first strand of rope 4 or the second strand of rope 4 is pulled. It is particularly advantageous to use this torque to move the cam 5 or generate a force aimed at moving the cam 5. As illustrated in the figure 3 , the two axes of rotation are spaced by a distance which is less than the radius of the pulley 2. The angular offset of the axis of the pulley and of the cam 5 is reduced between the two positions which allows to have a resumption of effort by means of pulley 2, the position of which changes little according to the direction of rotation sought for the pulley. On the contrary, in the document US 2014/0262611 , the axis of rotation of the blocking mechanism is distant from the pulley which requires having a friction zone which makes the connection between the pulley and the axis of rotation. The proposed configuration is then more voluminous and provides more friction which reduces the yield when pulling the strand of rope which is not stretched.

Dans une configuration particulière, le premier axe de rotation A et le deuxième axe de rotation B sont placés de sorte que le poids de la poulie 2 cause le déplacement de la came 5 hors de la position de blocage de la corde 4.In a particular configuration, the first axis of rotation A and the second axis of rotation B are placed so that the weight of the pulley 2 causes the cam 5 to move out of the rope locking position 4.

Dans une configuration particulière, le premier axe de rotation A et le deuxième axe de rotation B sont placés de sorte que lorsque l'on tire sur le premier brin de corde, la poulie 2 et la came 5 se déplacent pour s'éloigner de la position de blocage avant que la poulie 2 commence à tourner autour du premier axe de rotation A.In a particular configuration, the first axis of rotation A and the second axis of rotation B are placed so that when the first strand of rope is pulled, the pulley 2 and the cam 5 move to move away from the locking position before the pulley 2 begins to rotate around the first axis of rotation A.

Dans une configuration avantageuse, la came 5 est montée fixe sur le premier arbre 25, cette configuration permet d'avoir, par exemple, la rotation de la came 5 de manière identique à la rotation du deuxième axe de rotation B.In an advantageous configuration, the cam 5 is fixedly mounted on the first shaft 25, this configuration makes it possible to have, for example, the rotation of the cam 5 in an identical manner to the rotation of the second axis of rotation B.

Il est également avantageux de prévoir un mode de réalisation dans lequel le premier flasque 3 comporte une première rainure 6 et dans lequel la position de la poulie 2 est représentée par la position d'un indicateur dans la première rainure 6. Il est alors possible de déterminer rapidement si le blocage de la corde 4 provient de la position de la poulie 2 ou d'un autre élément. Si l'indicateur coopère avec une poignée 12, la position de la poignée 12 permet d'avoir une indication sur la position de l'indicateur.It is also advantageous to provide an embodiment in which the first flange 3 has a first groove 6 and in which the position of the pulley 2 is represented by the position of an indicator in the first groove 6. It is then possible to quickly determine if the blocking of the rope 4 comes from the position of the pulley 2 or from another element. If the indicator cooperates with a handle 12, the position of the handle 12 provides an indication of the position of the indicator.

De manière avantageuse illustrée à la figure 8, la poulie 2 et le deuxième axe de rotation B sont montés sur un support 7 associé à un premier pion 8 passant au travers de la première rainure 6. Le déplacement du premier pion 8 le long de la première rainure 6 entraine la rotation du support 7 selon le premier sens de rotation + et selon le second sens de rotation. La rotation du support 7 entraine la rotation du premier pion 8. Le support 7 se déplace entre une première position et une deuxième position. Comme illustré, il est particulièrement avantageux de prévoir que l'axe de rotation B du support 7, l'axe de rotation de la poulie et le point de fixation du descendeur à un point d'ancrage ne soient pas alignés car cela facilite la rotation de la came entre sa position de blocage et son autre position.Advantageously illustrated in the figure 8 , the pulley 2 and the second axis of rotation B are mounted on a support 7 associated with a first pin 8 passing through the first groove 6. The movement of the first pin 8 along the first groove 6 causes the rotation of the support 7 according to the first meaning of rotation + and according to the second direction of rotation. The rotation of the support 7 causes the rotation of the first pin 8. The support 7 moves between a first position and a second position. As illustrated, it is particularly advantageous to provide that the axis of rotation B of the support 7, the axis of rotation of the pulley and the point of attachment of the descender to an anchor point are not aligned because this facilitates rotation of the cam between its blocking position and its other position.

Préférentiellement, le premier flasque 3 définit une deuxième rainure 9. La position de la poulie 2 par rapport au premier flasque 3 est représentée par la position d'un deuxième indicateur dans la deuxième rainure 9. Le support 7 est associé à un deuxième pion 10 qui passe au travers de la deuxième rainure 9. Il est particulièrement avantageux d'utiliser un ressort 11 fixé au premier flasque 3 pour déplacer la poulie 2 vers la deuxième position, c'est-à-dire déplacer le deuxième pion 10 pour faciliter le blocage de la corde 4. Dans le mode de réalisation illustré, le ressort 11 est configuré pour déplacer la poulie 2 selon le second sens de rotation - et tendre vers la position de blocage de la corde 4.Preferably, the first flange 3 defines a second groove 9. The position of the pulley 2 relative to the first flange 3 is represented by the position of a second indicator in the second groove 9. The support 7 is associated with a second pin 10 which passes through the second groove 9. It is particularly advantageous to use a spring 11 fixed to the first flange 3 to move the pulley 2 to the second position, that is to say move the second pin 10 to facilitate the blocking of the rope 4. In the illustrated embodiment, the spring 11 is configured to move the pulley 2 according to the second direction of rotation - and tend towards the position for blocking the rope 4.

Il est particulièrement avantageux de prévoir que le ressort 11 soit fixé au deuxième indicateur, ici le deuxième pion 10 de manière à ne pas interférer avec la rotation de la poulie 2 et le cheminement de la corde 4.It is particularly advantageous to provide that the spring 11 is fixed to the second indicator, here the second pin 10 so as not to interfere with the rotation of the pulley 2 and the routing of the rope 4.

Dans le mode de réalisation illustré sur les figures 6 et 7, le ressort 11 est séparé de la poulie 2 par le premier flasque 3 ce qui permet d'avoir une architecture compacte dans le cheminement de la corde 4. Le ressort 11 peut être réalisé par toute technique connue par exemple avec un ressort hélicoïdal en torsion, en traction ou en compression. Il est également possible de former un ressort 11 par déformation élastique d'une ou plusieurs plaques. Il est particulièrement avantageux de prévoir que le ressort 11 soit monté autour du deuxième axe de rotation B ce qui permet de gagner en compacité.In the embodiment illustrated in the figures 6 and 7 , the spring 11 is separated from the pulley 2 by the first flange 3 which makes it possible to have a compact architecture in the path of the rope 4. The spring 11 can be produced by any known technique, for example with a torsion coil spring , in tension or compression. It is also possible to form a spring 11 by elastic deformation of one or more plates. It is particularly advantageous to provide that the spring 11 is mounted around the second axis of rotation B, which makes it possible to gain compactness.

Dans un mode de réalisation particulier, le descendeur 1 comporte une poignée 12 comme cela est illustré aux figures 1 à 7. La poignée 12 comporte une butée 12a agencée pour venir en contact du premier pion 8. La rotation de la poignée 12 selon le premier sens de rotation entraine la mise en contact de la butée 12a avec le premier pion puis le déplacement du premier pion selon le premier sens de rotation +.In a particular embodiment, the descender 1 has a handle 12 as illustrated in Figures 1 to 7 . The handle 12 comprises a stop 12a arranged to come into contact with the first pin 8. The rotation of the handle 12 according to the first direction of rotation causes the stop 12a to come into contact with the first pin then the displacement of the first pin according to the first direction of rotation +.

Ce mode de réalisation est particulièrement avantageux lorsque le deuxième pion 10 est associé au ressort 11. Le ressort 11 est agencé pour déplacer la poulie 2 vers la position de blocage.This embodiment is particularly advantageous when the second pin 10 is associated with the spring 11. The spring 11 is arranged to move the pulley 2 towards the locking position.

La rotation de la poignée 12 depuis une position d'attente permet de mettre en contact la butée 12a et le premier pion 8. En tournant la poignée 12, la butée 12a appuie sur le premier pion 8 qui se déplace. La poignée 12 exerce une force qui s'oppose à la force appliquée par le ressort 11 ce qui déplace la poulie 2 et la came 5 le cas échéant. La contrainte appliquée sur la corde 4 diminue ce qui autorise un glissement de la corde 4. Le déplacement de la poignée 12 permet de réguler la distance entre la poulie 2/la came 5 et la paroi latérale 3a ce qui permet de réguler l'intensité de la force de frottement et donc la vitesse de défilement de la corde 4 dans le descendeur 1.The rotation of the handle 12 from a standby position makes it possible to bring the stop 12a into contact with the first pin 8. By turning the handle 12, the stop 12a presses on the first pin 8 which moves. The handle 12 exerts a force which opposes the force applied by the spring 11 which displaces the pulley 2 and the cam 5 if necessary. The stress applied on the rope 4 decreases, which allows the rope to slide. The movement of the handle 12 makes it possible to regulate the distance between the pulley 2 / the cam 5 and the side wall 3a, which allows the intensity to be regulated. of the friction force and therefore the speed of travel of the rope 4 in the descender 1.

De manière plus générale, il est avantageux de prévoir que le ressort 11 déplace la came 5 vers la zone de blocage, c'est-à-dire déplace la came 5 vers une position de blocage de la corde de sorte que, par défaut, la came 5 bloque la corde 4 indépendamment de l'intensité du frottement entre la corde 4 et la poulie 2.More generally, it is advantageous to provide that the spring 11 displaces the cam 5 towards the blocking zone, that is to say displaces the cam 5 towards a position for blocking the rope so that, by default, the cam 5 blocks the rope 4 regardless of the intensity of the friction between the rope 4 and the pulley 2.

Dans cette configuration, la came 5 est par défaut dans une position qui bloque la corde 4. En tirant sur le premier brin de corde 4, le couple généré s'oppose au ressort ce qui permet un déplacement de la poulie et un déplacement de la came. La came ne bloque plus la corde qui peut être tirée en profitant de la rotation de la poulie pour obtenir un rendement élevé lors du tirage.In this configuration, the cam 5 is by default in a position which blocks the rope 4. By pulling on the first strand of rope 4, the torque generated opposes the spring, which allows a movement of the pulley and a movement of the cam. The cam no longer blocks the rope which can be pulled by taking advantage of the rotation of the pulley to obtain a high yield during pulling.

Dans le mode de réalisation illustré à la figure 5, le descendeur autobloquant 1 comporte une poulie 2 munie d'une roue crantée 13 associée à au moins un bloqueur 14 et à un ressort 15 dit ressort de blocage. La roue crantée 13, le au moins un bloqueur 14 et le ressort 15 sont agencés pour autoriser la rotation de la poulie 2 selon le premier sens de rotation + et empêcher la rotation de la poulie 2 selon le second sens de rotation -. Cette configuration est particulièrement avantageuse car le système de blocage selon le second sens de rotation se trouve à l'intérieur de la poulie 2 ce qui ne gêne pas le cheminement de la corde 4. Dans le mode de réalisation illustré, le ressort 15 est monté dans la poulie 2 afin de faciliter son intégration et la compacité de la poulie 2. Cependant d'autres configurations sont possibles.In the embodiment illustrated in figure 5 , the self-locking descender 1 comprises a pulley 2 provided with a toothed wheel 13 associated with at least one blocker 14 and a spring 15 called a blocking spring. The toothed wheel 13, the at least one blocker 14 and the spring 15 are arranged to allow rotation of the pulley 2 according to the first direction of rotation + and to prevent rotation of the pulley 2 according to the second direction of rotation -. This configuration is particularly advantageous because the locking system according to the second direction of rotation is located inside the pulley 2 which does not hinder the routing of the rope 4. In the illustrated embodiment, the spring 15 is mounted in the pulley 2 in order to facilitate its integration and the compactness of the pulley 2. However, other configurations are possible.

Avantageusement, la poulie 2 comporte une pluralité de méplats 16 agencés dans une gorge de la poulie 2 de manière à définir des rétrécissements dans la gorge. Ces multiples diminutions de la section de la gorge de la poulie 2 forment des zones de frottement privilégié lorsque la corde 4 doit glisser le long de la poulie 2. Il est également possible de prévoir d'utiliser un galet lisse ou un galet à facettes. Dans un mode de réalisation, le galet peut définir une gorge dont la section est en forme de V plus ou moins prononcé afin de définir la force de frottement.Advantageously, the pulley 2 comprises a plurality of flats 16 arranged in a groove in the pulley 2 so as to define narrowing in the groove. These multiple decreases in the section of the groove of the pulley 2 form areas of privileged friction when the rope 4 must slide along the pulley 2. It is also possible to provide for the use of a smooth roller or a faceted roller. In one embodiment, the roller can define a groove whose section is more or less pronounced V-shaped in order to define the friction force.

De manière avantageuse, le premier flasque 3 est associé à un deuxième flasque 17 qui est monté mobile par rapport au premier flasque 3. De manière avantageuse, le deuxième flasque 17 est monté mobile en rotation autour d'un troisième axe de rotation C. La rotation du deuxième flasque 17 permet d'ouvrir ou de fermer le descendeur 1 comme cela est illustré aux figures 1 et 2.Advantageously, the first flange 3 is associated with a second flange 17 which is mounted movable relative to the first flange 3. Advantageously, the second flange 17 is mounted movable in rotation about a third axis of rotation C. The rotation of the second flange 17 makes it possible to open or close the descender 1 as illustrated in figures 1 and 2 .

Le premier flasque 3 et le deuxième flasque 17 définissent chacun une ouverture de fixation 18. Les deux ouvertures de fixation 18 se placent en vis-à-vis de manière à coopérer avec un connecteur (non représenté), par exemple un mousqueton ce qui permet de fixer le descendeur 1 à un point fixe. Le premier flasque 3 définit également une deuxième ouverture de fixation 19 pour installer par exemple un mousqueton. Le premier flasque 3 comporte une butée de blocage 20 qui est configurée pour bloquer la progression du deuxième flasque 17 jusqu'à sa position de fermeture qui referme le descendeur 1.The first flange 3 and the second flange 17 each define a fixing opening 18. The two fixing openings 18 are placed opposite so as to cooperate with a connector (not shown), for example a carabiner which allows to fix the descender 1 at a fixed point. The first flange 3 also defines a second fixing opening 19 for installing, for example, a carabiner. The first flange 3 has a blocking stop 20 which is configured to block the progression of the second flange 17 to its closed position which closes the descender 1.

Comme illustré à la figure 8, il est possible d'installer le premier axe de rotation 1 de la poulie 2 sur un support 7 de manière à ce qu'elle puisse se déplacer selon deux mouvements différents éventuellement simultanément par rapport au premier flasque 3.As illustrated in figure 8 , it is possible to install the first axis of rotation 1 of the pulley 2 on a support 7 so that it can move in two different movements, possibly simultaneously with respect to the first flange 3.

De manière avantageuse, la came 5 est fixée sur le support 7 au moyen d'un élément de fixation 22 qui s'étend à travers la première ouverture 6 pour former le premier pion 8. Préférentiellement, l'élément de fixation 22 traverse le support 7 jusqu'à atteindre un deuxième support 23. Le deuxième support 23 est fixé au premier support 7. Le premier support 7 et le deuxième support 23 sont séparés par la poulie 2 et par la came 5. La came 5 est montée fixe sur le support 7.Advantageously, the cam 5 is fixed to the support 7 by means of a fixing element 22 which extends through the first opening 6 to form the first pin 8. Preferably, the fixing element 22 passes through the support 7 until a second support 23 is reached. The second support 23 is fixed to the first support 7. The first support 7 and the second support 23 are separated by the pulley 2 and by the cam 5. The cam 5 is mounted fixed on the support 7.

Préférentiellement, le premier pion 8 est entouré par un ou plusieurs roulements 24 ce qui permet d'améliorer le glissement dans la première rainure 6.Preferably, the first pin 8 is surrounded by one or more bearings 24 which makes it possible to improve the sliding in the first groove 6.

L'axe de rotation A est avantageusement défini par un arbre 25. L'arbre 25 comporte un premier trou traversant qui s'aligne avec un premier trou traversant du support 7 afin d'insérer un deuxième arbre 26 formant le deuxième axe de rotation B. De manière avantageuse, le deuxième support 23 comporte un premier trou qui s'aligne avec le premier trou de l'arbre 25 ce qui permet de fixer l'arbre de rotation 25, le premier support 7 et le deuxième support 23 au moyen du deuxième arbre 26.The axis of rotation A is advantageously defined by a shaft 25. The shaft 25 has a first through hole which aligns with a first through hole of the support 7 in order to insert a second shaft 26 forming the second axis of rotation B Advantageously, the second support 23 has a first hole which aligns with the first hole in the shaft 25 which makes it possible to fix the rotation shaft 25, the first support 7 and the second support 23 by means of the second shaft 26.

De manière avantageuse, l'arbre 25 comporte également un deuxième trou traversant qui s'aligne avec un deuxième trou traversant du support 7 et éventuellement un deuxième trou traversant du deuxième support 23. Les deuxièmes trous traversants sont traversés par une deuxième tige formant le pion 10. L'utilisation de deux séries de trous traversants permet d'assurer que le mouvement appliqué sur le support 7 se traduise par un même mouvement sur l'arbre 25 et donc sur le premier axe de rotation ainsi que sur la came 5.Advantageously, the shaft 25 also comprises a second through hole which aligns with a second through hole of the support 7 and possibly a second through hole of the second support 23. The second through holes are crossed by a second rod forming the pin 10. The use of two series of through holes ensures that the movement applied to the support 7 results in the same movement on the shaft 25 and therefore on the first axis of rotation as well as on the cam 5.

Dans un mode de réalisation préférentiel, l'arbre 25 est séparé du support 7 par un roulement 27 ce qui permet d'améliorer la rotation de l'arbre 25 par rapport au support 7 et donc d'améliorer la rotation de la poulie 2 par rapport au support 7.In a preferred embodiment, the shaft 25 is separated from the support 7 by a bearing 27 which improves the rotation of the shaft 25 relative to the support 7 and therefore improves the rotation of the pulley 2 by support 7.

La poulie 2 est de section circulaire et présente une gorge pour le passage de la corde 4. La poulie 2 se présente sous la forme d'un anneau afin d'installer le premier axe de rotation A au centre de la poulie 2. La poulie définit avantageusement une roue dentée 13.The pulley 2 is of circular section and has a groove for the passage of the rope 4. The pulley 2 is in the form of a ring in order to install the first axis of rotation A in the center of the pulley 2. The pulley advantageously defines a toothed wheel 13.

La roue dentée 13 coopère avec des bloqueurs 14 qui sont installés sur l'arbre 25 ainsi qu'avec des ressorts 15 qui appuient sur les bloqueurs 14, pour décaler les bloqueurs 14 vers l'extérieur et les dents de la roue dentée 13.The toothed wheel 13 cooperates with blockers 14 which are installed on the shaft 25 as well as with springs 15 which press on the blockers 14, to shift the blockers 14 outwards and the teeth of the toothed wheel 13.

Dans le mode de réalisation illustré, la poulie 2 est montée rotative au moyen d'un roulement 21, par exemple un roulement à billes qui s'insère entre la poulie 2 et l'arbre 25. L'arbre 25 définit le premier axe de rotation A et le roulement 21 permet de faciliter la rotation de la poulie 2 par rapport à l'arbre 25.In the illustrated embodiment, the pulley 2 is rotatably mounted by means of a bearing 21, for example a ball bearing which is inserted between the pulley 2 and the shaft 25. The shaft 25 defines the first axis of rotation A and the bearing 21 makes it possible to facilitate the rotation of the pulley 2 relative to the shaft 25.

L'utilisation du descendeur 1 peut être décrite de la manière suivante. Un descendeur autobloquant 1 selon l'un des multiples modes de réalisation décrits précédemment est fourni. La corde 4 est installée dans le descendeur 1 entre la poulie et la paroi latérale 3a. L'utilisateur tire sur le premier brin de la corde 4 ce qui permet faire tourner la poulie 2 selon un premier sens de rotation +. La charge accrochée au deuxième brin de la corde 4 est soulevée.The use of the descender 1 can be described as follows. A self-locking descender 1 according to one of the multiple embodiments described above is provided. The rope 4 is installed in the descender 1 between the pulley and the side wall 3a. The user pulls on the first strand of the rope 4 which allows the pulley 2 to rotate in a first direction of rotation +. The load attached to the second strand of the rope 4 is lifted.

Le deuxième brin de corde 4 est tiré pour faire tourner la poulie 2 selon le second sens de rotation - ce qui cause le blocage de la poulie 2. La poulie 2 se déplace en direction d'une paroi latérale jusqu'au blocage de la corde 4.The second strand of rope 4 is pulled to rotate the pulley 2 in the second direction of rotation - which causes blocking of the pulley 2. The pulley 2 moves towards a side wall until the rope blocks 4.

Dans l'exemple de réalisation illustré, l'effort appliqué sur le deuxième brin de corde entraine le déplacement du support 7, ici un déplacement en rotation avec un déplacement en rotation de la came 5.In the illustrated embodiment, the force applied to the second strand of rope causes the support 7 to move, here a rotation movement with a rotation movement of the cam 5.

Dans une configuration particulière, le ressort 11 déplace le support 7 vers la position de blocage de sorte que le descendeur 1 bloque la corde 4 par défaut. Lorsqu'une tension est appliquée sur le premier brin de corde 4, la poulie 2 se déplace de manière à débloquer la corde 4 et faciliter la rotation de la poulie 2 et donc le rendement lors de la remontée de la charge présente sur le deuxième brin de corde 4.In a particular configuration, the spring 11 moves the support 7 towards the blocking position so that the descender 1 blocks the rope 4 by default. When a tension is applied to the first strand of rope 4, the pulley 2 moves so as to unlock the rope 4 and facilitate the rotation of the pulley 2 and therefore the efficiency when raising the load present on the second strand rope 4.

Une fois la tension relâchée sur le premier brin de corde 4, le support 7 revient vers la position de blocage.Once the tension is released on the first strand of rope 4, the support 7 returns to the blocking position.

Dans les modes de réalisation illustrés, la poignée est montée mobile en rotation autour d'un arbre 28 qui définit un axe de rotation C.In the illustrated embodiments, the handle is rotatably mounted around a shaft 28 which defines an axis of rotation C.

Claims (11)

Poulie autobloquante (1) comportant : - un premier flasque (3) muni d'une zone de blocage, - une poulie (2) agencée pour venir en contact de la corde (4) et montée rotative autour d'un premier arbre de rotation (25) définissant un premier axe de rotation (A), le premier arbre de rotation (25) étant fixé à un support (7), - le support (7) monté mobile en rotation autour d'un deuxième arbre de rotation (26) fixé au premier flasque (3), le deuxième arbre de rotation (26) définissant un deuxième axe de rotation (B), le support (7) se déplaçant entre une première position et une deuxième position, - une came (5) fixée sur le support (7), la came (5) étant mobile en rotation par rapport au premier flasque (3) autour du deuxième arbre entre une première position où la distance avec la zone de blocage est minimale et une seconde position, - le premier axe de rotation (A) est décalé du deuxième axe de rotation (B) de sorte que l'application d'un effort sur la corde (4) pour faire tourner la poulie (2) selon le premier sens de rotation (+) génère une force visant à éloigner la came (5) de la zone de blocage et l'application d'un effort sur la corde (4) pour faire tourner la poulie (2) selon le second sens de rotation (-) génère une force visant à rapprocher la came (5) de la zone de blocage, le premier arbre de rotation (25) étant mobile autour du deuxième axe de rotation (B) et mobile par rapport à la zone de blocage, poulie autobloquante (1) caractérisée en ce que : - le premier axe de rotation (A) est décalé du deuxième axe de rotation (B) d'une distance inférieure au rayon de la poulie (2), - la poulie (2) est configurée pour tourner uniquement selon un premier sens de rotation (+) autour du premier axe de rotation (A) et empêcher la rotation dans le second sens de rotation (-) autour dudit premier axe de rotation (A), - la poulie (2) est agencée pour définir un chemin de circulation de corde possédant un demi-cercle, le demi-cercle étant formé par une gorge de la poulie (2). Self-locking pulley (1) comprising: - a first flange (3) provided with a blocking zone, - a pulley (2) arranged to come into contact with the rope (4) and rotatably mounted around a first rotation shaft (25) defining a first axis of rotation (A), the first rotation shaft (25) being fixed to a support (7), - the support (7) mounted so as to rotate about a second rotation shaft (26) fixed to the first flange (3), the second rotation shaft (26) defining a second axis of rotation (B), the support ( 7) moving between a first position and a second position, a cam (5) fixed on the support (7), the cam (5) being movable in rotation relative to the first flange (3) around the second shaft between a first position where the distance from the blocking zone is minimum and a second position, - the first axis of rotation (A) is offset from the second axis of rotation (B) so that the application of a force on the rope (4) to rotate the pulley (2) according to the first direction of rotation ( +) generates a force aimed at moving the cam (5) away from the blocking zone and the application of a force on the rope (4) to rotate the pulley (2) according to the second direction of rotation (-) generates a force aimed at bringing the cam (5) closer to the blocking zone, the first rotation shaft (25) being mobile around the second axis of rotation (B) and mobile relative to the blocking zone, self-locking pulley (1) characterized in that : the first axis of rotation (A) is offset from the second axis of rotation (B) by a distance less than the radius of the pulley (2), - the pulley (2) is configured to rotate only in a first direction of rotation (+) around the first axis of rotation (A) and to prevent rotation in the second direction of rotation (-) around said first axis of rotation (A ) - The pulley (2) is arranged to define a rope circulation path having a semicircle, the semicircle being formed by a groove in the pulley (2). Poulie autobloquante (1) selon la revendication 1, dans laquelle un ressort (11) est agencé pour appliquer une force déplaçant la came (5) vers la zone de blocage.Self-locking pulley (1) according to claim 1, in which a spring (11) is arranged to apply a force moving the cam (5) towards the blocking zone. Poulie autobloquante (1) selon l'une des revendications précédentes, dans laquelle lorsque la poulie (2) se meut selon le premier sens de rotation (+), la poulie (2) se trouve dans une première position qui est plus éloignée de la zone de blocage qu'une deuxième position représentative d'un blocage de la corde (4).Self-locking pulley (1) according to one of the preceding claims, in which when the pulley (2) moves in the first direction of rotation (+), the pulley (2) is in a first position which is further from the blocking zone as a second position representing a blocking of the rope (4). Poulie autobloquante (1) selon la revendication précédente, dans laquelle la came (5) est montée fixe par rapport au deuxième axe de rotation (B) et par rapport au premier axe de rotation (A).Self-locking pulley (1) according to the preceding claim, in which the cam (5) is mounted fixed relative to the second axis of rotation (B) and relative to the first axis of rotation (A). Poulie autobloquante (1) selon l'une quelconque des revendications précédentes, dans laquelle le premier flasque (3) comporte : - une première rainure (6) et dans lequel un premier pion (8) monté fixe sur le support (7) passe au travers de la première rainure (6), le déplacement du premier pion (8) selon le premier sens de rotation le long de la première rainure (6) représentant la rotation du support (7) selon le premier sens de rotation (+), - une poignée (12) comportant une butée (12a) agencée pour venir en contact du premier pion (7), la rotation de la poignée (12) selon le premier sens de rotation entrainant la mise en contact de la butée (12a) avec le premier pion (8) et la rotation du premier pion (7) selon le premier sens de rotation (+). Self-locking pulley (1) according to any one of the preceding claims, in which the first flange (3) comprises: - A first groove (6) and in which a first pin (8) fixedly mounted on the support (7) passes through the first groove (6), the displacement of the first pin (8) according to the first direction of rotation the along the first groove (6) representing the rotation of the support (7) according to the first direction of rotation (+), - A handle (12) comprising a stop (12a) arranged to come into contact with the first pin (7), the rotation of the handle (12) according to the first direction of rotation causing the contact of the stop (12a) with the first pin (8) and the rotation of the first pin (7) in the first direction of rotation (+). Poulie autobloquante (1) selon l'une des revendications 2 à 5, dans laquelle le premier flasque (3) comporte une deuxième rainure (9) et dans lequel un deuxième pion (10) est monté fixe sur le support (7) et passe au travers de la deuxième rainure (9), le ressort (11) étant fixé au premier flasque (3) et définissant une position de repos où la came (5) est dans la première position.Self-locking pulley (1) according to one of claims 2 to 5, in which the first flange (3) has a second groove (9) and in which a second pin (10) is fixedly mounted on the support (7) and passes through the second groove (9), the spring (11) being fixed to the first flange (3) and defining a rest position where the cam (5) is in the first position. Poulie autobloquante (1) selon la revendication précédente, dans laquelle le ressort (11) est monté autour du deuxième axe de rotation (B).Self-locking pulley (1) according to the preceding claim, in which the spring (11) is mounted around the second axis of rotation (B). Poulie autobloquante (1) selon l'une quelconque des revendications précédentes, dans laquelle le deuxième arbre (26) passe au travers de la poulie (2) pour former une butée de fin de course coopérant avec une rainure formée dans le deuxième flasque monté rotatif au premier flasque (3), la butée de fin de course définissant une position fermée du descendeur autobloquant.Self-locking pulley (1) according to any one of the preceding claims, in which the second shaft (26) passes through the pulley (2) to form a limit stop cooperating with a groove formed in the second flange mounted to rotate. at the first flange (3), the limit stop defining a closed position of the self-locking descender. Poulie autobloquante (1) selon l'une quelconque des revendications précédentes, dans laquelle la poulie (2) comporte une roue crantée (13) associée à au moins un bloqueur (14) et à un ressort (15) de blocage, la roue crantée (13), le au moins un bloqueur (14) et le ressort (15) de blocage étant agencés pour autoriser la rotation de la poulie (2) selon le premier sens de rotation (+) et empêcher la rotation selon le second sens de rotation (-).Self-locking pulley (1) according to any one of the preceding claims, in which the pulley (2) comprises a toothed wheel (13) associated with at least one blocker (14) and a locking spring (15), the toothed wheel. (13), the at least one blocker (14) and the blocking spring (15) being arranged to allow rotation of the pulley (2) in the first direction of rotation (+) and to prevent rotation in the second direction of rotation (-). Poulie autobloquante (1) selon l'une quelconque des revendications précédentes, dans laquelle la poulie (2) comporte une pluralité de méplats (16) agencés dans une gorge de la poulie (2) de manière à définir des rétrécissements dans la gorge.Self-locking pulley (1) according to any one of the preceding claims, in which the pulley (2) has a plurality of flats (16) arranged in a groove of the pulley (2) so as to define narrowing in the groove. Procédé de blocage d'une corde caractérisé en ce qu'il comporte : - fournir une poulie autobloquante (1) selon l'une des revendications précédentes avec une poulie (2) montée mobile sur un premier flasque (3) et une came (5), - installer une corde (2) dans la poulie autobloquante (1), - tirer sur la corde (2) de manière à faire tourner la poulie (2) selon un premier sens de rotation (+), l'axe de rotation de la poulie (2) se déplaçant selon une première direction, - tirer sur la corde (2) pour faire tourner la poulie (2) selon un second sens de rotation (-) et causer le blocage de la poulie (2), la came (5) se déplaçant en direction d'une zone de blocage jusqu'au blocage de la corde (4), l'axe de rotation de la poulie (2) se déplaçant selon une seconde direction opposée à la première direction. Method for blocking a rope, characterized in that it comprises: - supply a self-locking pulley (1) according to one of the preceding claims with a pulley (2) movably mounted on a first flange (3) and a cam (5), - install a rope (2) in the self-locking pulley (1), - pull on the rope (2) so as to rotate the pulley (2) according to a first direction of rotation (+), the axis of rotation of the pulley (2) moving in a first direction, - pull on the rope (2) to rotate the pulley (2) in a second direction of rotation (-) and cause blocking of the pulley (2), the cam (5) moving in the direction of an area of blocking until blocking of the rope (4), the axis of rotation of the pulley (2) moving in a second direction opposite to the first direction.
EP19187414.8A 2018-07-24 2019-07-19 Abseiling device with pulley Active EP3599000B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1856877A FR3084264B1 (en) 2018-07-24 2018-07-24 PULLEY DESCENDER

Publications (2)

Publication Number Publication Date
EP3599000A1 true EP3599000A1 (en) 2020-01-29
EP3599000B1 EP3599000B1 (en) 2023-12-13

Family

ID=63579474

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19187414.8A Active EP3599000B1 (en) 2018-07-24 2019-07-19 Abseiling device with pulley

Country Status (6)

Country Link
US (1) US10828516B2 (en)
EP (1) EP3599000B1 (en)
CN (1) CN212757097U (en)
BR (1) BR102019015108B1 (en)
ES (1) ES2966904T3 (en)
FR (1) FR3084264B1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112827091A (en) * 2021-01-25 2021-05-25 列耀乐 Automatic control emergency stop rope pulley for forest rescue
EP4082629A4 (en) * 2020-08-18 2023-05-24 Ficont Industry (Beijing) Co., Ltd. Rope locking apparatus

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10227030B2 (en) * 2015-06-01 2019-03-12 Kenneth G. Kingery Ratchet configurations
FR3080045B1 (en) * 2018-04-11 2020-05-15 Zedel SELF-LOCKING DESCENDER WITH RELEASABLE HANDLE
US11473989B2 (en) * 2018-07-31 2022-10-18 Illinois Tool Works Inc. Multi-dimensional sheave for use in tension measurement systems
WO2020077340A1 (en) 2018-10-12 2020-04-16 Coulter Ventures, LLC Weightlifting machine
USD951073S1 (en) * 2020-01-10 2022-05-10 Livsmed Inc. Pulley for surgical instrument
USD952447S1 (en) * 2020-07-09 2022-05-24 Livsmed Inc. Pulley for surgical instrument
USD972724S1 (en) * 2020-09-29 2022-12-13 Livsmed Inc. Pulley for surgical instrument
US12076594B2 (en) * 2020-11-23 2024-09-03 Yoke Industrial Corp. Fall arrester
US11905148B2 (en) 2021-01-04 2024-02-20 Basecamp Innovations Ltd Snatch block with slide-open spring-biased cheek, dual-plunger lock release, and integral swivel stud
USD1015125S1 (en) * 2021-02-19 2024-02-20 Coulter Ventures, Llc. Pulley
USD1012673S1 (en) * 2021-02-19 2024-01-30 Coulter Ventures, Llc. Pulley
FR3125971A1 (en) 2021-08-03 2023-02-10 Zedel BELAY DEVICE AND METHOD OF USE

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2137519C1 (en) * 1998-11-24 1999-09-20 Козлов Виктор Алексеевич Lifting and lowering apparatus
US7419138B1 (en) 2007-02-23 2008-09-02 Cmc Rescue, Inc. Self-camming pulley
US7658264B2 (en) 2005-03-16 2010-02-09 Kirk Martin Mauthner Combination descender, pulley and force limiting rope brake
US20140262611A1 (en) 2013-03-14 2014-09-18 Black Diamond Equipment, Ltd. Systems for Assisted Braking Belay with a Cam-Clutch Mechanism
US9120654B2 (en) 2010-07-16 2015-09-01 Zedel Pulley with unlockable clamp
WO2016164613A1 (en) * 2015-04-07 2016-10-13 Harken, Incorporated High load descender with adaptive release linkage

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6068242A (en) * 1994-04-25 2000-05-30 Kingery; Gerald M. Unitary, ridged and ratcheted pulley block
US20130043450A1 (en) * 2011-08-19 2013-02-21 Russ Kommer Lifting or locking system and method

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2137519C1 (en) * 1998-11-24 1999-09-20 Козлов Виктор Алексеевич Lifting and lowering apparatus
US7658264B2 (en) 2005-03-16 2010-02-09 Kirk Martin Mauthner Combination descender, pulley and force limiting rope brake
US7419138B1 (en) 2007-02-23 2008-09-02 Cmc Rescue, Inc. Self-camming pulley
US9120654B2 (en) 2010-07-16 2015-09-01 Zedel Pulley with unlockable clamp
US20140262611A1 (en) 2013-03-14 2014-09-18 Black Diamond Equipment, Ltd. Systems for Assisted Braking Belay with a Cam-Clutch Mechanism
WO2016164613A1 (en) * 2015-04-07 2016-10-13 Harken, Incorporated High load descender with adaptive release linkage

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP4082629A4 (en) * 2020-08-18 2023-05-24 Ficont Industry (Beijing) Co., Ltd. Rope locking apparatus
CN112827091A (en) * 2021-01-25 2021-05-25 列耀乐 Automatic control emergency stop rope pulley for forest rescue
CN112827091B (en) * 2021-01-25 2022-07-22 列耀乐 Automatic control emergency stop rope pulley for forest rescue

Also Published As

Publication number Publication date
FR3084264A1 (en) 2020-01-31
BR102019015108A2 (en) 2020-02-04
EP3599000B1 (en) 2023-12-13
FR3084264B1 (en) 2020-09-18
US20200031638A1 (en) 2020-01-30
CN212757097U (en) 2021-03-23
BR102019015108B1 (en) 2023-04-25
US10828516B2 (en) 2020-11-10
ES2966904T3 (en) 2024-04-24

Similar Documents

Publication Publication Date Title
EP3599000B1 (en) Abseiling device with pulley
EP2131927B1 (en) Belay and/or rappelling accessory
EP3816093B1 (en) Self-locking pulley
FR2649284A1 (en) CUTTING HEAD, WHICH CAN BE DRIVEN IN ROTATION, FOR AN APPARATUS FOR CUTTING PLANTS
FR2995500A1 (en) ROTARY CUTTING HEAD WITH THREADS AND ASSEMBLY COMPRISING SUCH A HEAD AND A DRIVING SHAFT OF SAID HEAD
FR2505309A1 (en) DEVICE FOR BRAKING AND / OR IMMOBILIZING A LOAD, IN PARTICULAR A FALL PROTECTION DEVICE
FR2978515A1 (en) DEVICE FOR LOCKING AND UNLOCKING A LONGILINE TUBULAR ELEMENT
EP3747518A1 (en) Double pulley
EP3659675A2 (en) Safety device
FR2522719A1 (en) WINDING STORE
FR2749360A1 (en) UNIDIRECTIONAL CLUTCH
EP2857070A1 (en) Connection device which is displaceable and removable along a rope
FR2884429A1 (en) Cord locking and blocking device for e.g. mountaineering, has opening arm rotated between two positions by spring wire, where arm has operating opening for transversal passage of operating snap hook in free end zone of arm
EP4129419A1 (en) Belay device and method for using same
FR2945603A1 (en) Pulley for sail boat equipment, has flanges comprising respective guiding elements to form bridge between flanges, where each element has hole in region axially projected towards exterior for passage of fixation rope or textile shackle
WO2014060692A1 (en) Variable-speed belt drive
EP4137706B1 (en) Device and method for assembling tubes
EP3924070B1 (en) Connector, releasable dummy fork provided with such a connector and operating method
WO2008074930A1 (en) Device for connecting/disconnecting two members by a relative axial displacement of said members
CA2155798C (en) Lifting ring for side load
FR3098409A1 (en) SECURE OPENING PULLEY
EP4066906A1 (en) Device for attachment to an anchoring point and method of using the attachment device
FR3144017A1 (en) MOVING CAM LOCK DEVICE AND METHOD FOR ATTACHING A MOVING CAM LOCK DEVICE TO A WIRED ELEMENT
EP4124253A1 (en) Adjustment system with improved operation, method for manufacturing such an adjustment system and adjustment method
FR2900994A1 (en) Support assembly and ejectable assembly connecting device for use in sailing boat fitting field, has support assembly with hollow body integrated to ejectable assembly and provided with swivel permitting rotation of rotating element

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION HAS BEEN PUBLISHED

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20201020

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20230403

GRAJ Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTC Intention to grant announced (deleted)
INTG Intention to grant announced

Effective date: 20230626

GRAJ Information related to disapproval of communication of intention to grant by the applicant or resumption of examination proceedings by the epo deleted

Free format text: ORIGINAL CODE: EPIDOSDIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTC Intention to grant announced (deleted)
INTG Intention to grant announced

Effective date: 20230921

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE PATENT HAS BEEN GRANTED

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

Free format text: NOT ENGLISH

REG Reference to a national code

Ref country code: CH

Ref legal event code: EP

REG Reference to a national code

Ref country code: DE

Ref legal event code: R096

Ref document number: 602019043124

Country of ref document: DE

REG Reference to a national code

Ref country code: IE

Ref legal event code: FG4D

Free format text: LANGUAGE OF EP DOCUMENT: FRENCH

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240314

REG Reference to a national code

Ref country code: LT

Ref legal event code: MG9D

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

REG Reference to a national code

Ref country code: NL

Ref legal event code: MP

Effective date: 20231213

REG Reference to a national code

Ref country code: ES

Ref legal event code: FG2A

Ref document number: 2966904

Country of ref document: ES

Kind code of ref document: T3

Effective date: 20240424

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240314

Ref country code: BG

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240313

REG Reference to a national code

Ref country code: AT

Ref legal event code: MK05

Ref document number: 1639987

Country of ref document: AT

Kind code of ref document: T

Effective date: 20231213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

Ref country code: RS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

Ref country code: NO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240313

Ref country code: NL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

Ref country code: LV

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

Ref country code: HR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240413

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SM

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

Ref country code: SK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

Ref country code: RO

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

Ref country code: IS

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240413

Ref country code: EE

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

Ref country code: CZ

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

Ref country code: AT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240415

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: PT

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20240415

Ref country code: PL

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20240719

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DK

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 20231213

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20240723

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20240724

Year of fee payment: 6

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT