EP2301631A1 - Self-locking rope safety device - Google Patents

Self-locking rope safety device Download PDF

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Publication number
EP2301631A1
EP2301631A1 EP10354053A EP10354053A EP2301631A1 EP 2301631 A1 EP2301631 A1 EP 2301631A1 EP 10354053 A EP10354053 A EP 10354053A EP 10354053 A EP10354053 A EP 10354053A EP 2301631 A1 EP2301631 A1 EP 2301631A1
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EP
European Patent Office
Prior art keywords
lever
cam
rope
flange
lug
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
EP10354053A
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German (de)
French (fr)
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EP2301631B1 (en
Inventor
Michael Chaumontet
Christophe Quillard
Alain Maurice
Paul Petzl
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Zedel SAS
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Zedel SAS
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Publication of EP2301631A1 publication Critical patent/EP2301631A1/en
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Publication of EP2301631B1 publication Critical patent/EP2301631B1/en
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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

Definitions

  • the invention relates to a self-locking rope insurance device, which can serve as a descender or to ensure a climber.
  • a self-locking rope insurance device which can serve as a descender or to ensure a climber.
  • Such a device is intended to lock on the rope automatically as soon as the rope is under tension. If the user wants to scroll the rope, he must intervene manually on a lever.
  • the figure 1 represents partially and in situation a conventional self-locking device, as described in the patent EP0398819 .
  • the device comprises a pair of pulleys 12, 14 housed between two parallel flanges, of which only one 18 is shown, hereinafter referred to as the base flange.
  • the first pulley 12 is rotatably mounted by means of a fixing member 22 on the base flange 18.
  • the pulley 12 is equipped with a circular upper sector having a guide groove of the rope 26, and a braking surface 28, located opposite the second pulley 14.
  • the braking surface 28 is substantially flat.
  • the second pulley 14 is secured to a support plate 30 mounted to pivot about an axis 32 of the flange 18.
  • the pulley 14 is cam-shaped, which is eccentric relative to the pivot axis 32.
  • This cam 14 has a circular lower sector having a groove 34 for winding the rope 26, this groove 34 being centered on a fictitious axis slightly opposed to the axis 32.
  • a wedge 36 intended to wedge the rope 26 against the braking surface 28, when the support plate 30 rotates clockwise under the effect of the tension of the rope and the friction force of the latter on the cam 14.
  • the surface 38 is substantially flat, and is further away from the axis 32 as the surface 40.
  • the position of the axis 32 of the cam 14 is such that the wedge 36 never comes into engagement with the braking surface 28 of the pulley 12.
  • the plate 30 pivots until the first and second surfaces 28, 38 are found facing each other, parallel to each other. one to another, and wedge the rope 26. This position occurs during a fall of the user.
  • the bottom portion of the base flange 18 is provided with an opening 48 to which can be hung a carabiner (not shown).
  • a control lever 58 is associated with the support plate 30 to rotate, by a manual action, the cam 14 about the axis 32, from a locking position to an unlocking position.
  • the control lever 58 is articulated on the plate 30 in an axis 60 located opposite the axis 32 relative to the groove 34, and cooperates with a return spring 62 which biases the lever 58 to a rest position in alignment with the axes 32 and 60.
  • the working position of the lever 58 is illustrated in dashed line on the figure 1 , and is obtained by lowering the lever 58 counter-clockwise, against the restoring force of the spring 62.
  • the device In operation, the device is fixed to a user by a carabiner passing through the opening 48, and the rope exiting the device through the cam 14 is under tension, for example under the weight of the user when the device is used downhill .
  • This tension causes the plate 30 and the cam 14 to pivot in the clockwise directions and the progressive jamming of the rope between the wedge 36 and the surface 28 without any other action by the user. If the user wants to continue his progress, he must manually loosen the rope by pulling the control lever 58 counterclockwise.
  • the useful range of the braking positions is in a low clearance of the lever 58, so that the user has difficulty finding the braking position that suits him, allowing him to progress continuously at the desired speed.
  • the effort required to pass the cam 14 from the locked position to a position where the rope can begin to scroll is significantly more important than the effort required to modulate the braking on a rope that runs. As a result, the user progresses jerkily while constantly seeking the correct position between the locked position and the free position.
  • a self-locking rope insurance device comprising a cam arranged to cause a locking of the rope when the rope is under tension, and a lever arranged to act on the cam to cause a progressive release of the rope. rope by manual action on the lever.
  • the lever acts on the cam respectively with a multiplied effect in an initial part of its unlocking stroke, and with a direct effect in a final part of its stroke.
  • the figure 2 is an exploded perspective view of an embodiment of insurance device for fine regulation of the speed of travel of the rope.
  • elements having the same functions as those of the classical device of the figure 1 , designated by the same references, even if they are sometimes of different shapes.
  • flange 18 serves as a reference piece for mounting the other elements.
  • the cam 14 and the plate 30 form a single piece hinged about the axis 32. This single piece will hereinafter be designated by the cam 14.
  • the lever 58 articulated on the cam 14 by the axis 60, is shown in the rest position, folded to conform to the overall contour of the device.
  • the base of the lever 58 on the opposite side to a handle portion, is provided with a lug 100 parallel to the axis 60.
  • the lug 100 In the rest position shown of the lever, the lug 100 is located on the opposite side to the axis 32 relative to the axis 60.
  • This lug 100 extends downwardly and exceeds the upper plane of the flange 18.
  • the flange 18 is hollowed out in 102 to allow the passage of the lug 100 over most of the stroke of the lever 58 between its rest position and its unfolded active position.
  • the flange 18 has a stop 104 ending the recess 102, against which the lug 100 bears when the lever 58 is unfolded to its active position, as will be described in more detail using the figure 4a .
  • this lug In order to limit the matting of the flange 18 by the lug 100 at the recess 102, this lug is surrounded by a ring 106 of internal diameter greater than the diameter of the lug. This ring is floating and, in order to hold it in place, it is guided in a groove formed by the wall of the recess 102 and upstanding walls of the cam 14.
  • the fixed pulley 12 of the figure 1 is replaced by a part 12 held by the shaft 22 and having the braking surface 28.
  • the part 12 is immobilized in rotation by a tongue 12-1 penetrating into a notch 18-1 of the flange 18.
  • the axes 22 and 32 are shown disconnected from the flange 18 for reasons of visibility. In normal configuration, these axes 22 and 32 are integral with the flange 18.
  • a second flange 20 serves to close the device and keep the rope in place. It is articulated on the flange 18 by the axis 22 to allow the withdrawal and the establishment of the rope. It is held in the closed position by a carabiner (not shown) inserted through the orifice 48 of the flange 18 and a conjugate orifice 50 of the flange 20.
  • a molded resin shape 108 fills the unused empty space between the flanges 18 and 20 and provides protection for the mechanism.
  • the figure 3 represents a front view of the device of the figure 2 with a rope 26 installed, in its locking position. A portion of the lever 58 and the flange 18 is not shown to make visible the way the cam 14 acts on the rope 26.
  • the cam 14 has substantially the shape of the cam of the figure 1 . It comprises in particular a wedge portion 36 used to wedge the rope against the braking surface 28.
  • the rope 26 enters the device from the right, passes under the cam 14, and leaves left between the wedge 36 and the braking surface 28.
  • the device is hooked to a user by a carabiner (not shown) passing through port 48.
  • the right side of the rope is under tension, either by the weight of the user when using the device descender, or by the traction exerted by a person to ensure climbing. This tension biases the cam 14 anti-clockwise about the axis 32, whereby the wedge 36 tightens the rope against the braking surface 28 the stronger the voltage is important.
  • the user To exit this locking position, the user must rotate the cam 14 clockwise about the axis 32, to move the corner 36 of the braking surface 28. To do this, it pulls the lever 58 after unfolding it clockwise around the axis 60.
  • the figure 4a represents the device of the figure 3 , with the lever 58 unfolded to a position where can begin the biasing of the cam 14 for unlocking. A portion of the lever 58 is not shown to see the position of the lug 100. It also shows the ring 106 surrounding the lug.
  • the lug 100 bears against the abutment 104 of the flange 18 between the axes 32 and 60 of the cam and the lever. From this position, if the user pulls the lever clockwise, the cam 14 is biased clockwise with a reduced effort compared to a conventional arrangement of the lever.
  • the reduction factor is equal to the ratio of the distance between the lug 100 and the center of the handle portion of the lever, the distance between the lug 100 and the axis 60.
  • the figure 4b represents the device of the figure 3 in a release position, obtained when the user continues to pull the lever clockwise from the position of the figure 4a .
  • the lug 100 disengages from the stop 104 and bears against a wall of the cam 14, as shown in FIG. figure 4b .
  • the lever 58 is then in an end position unfolded on the cam 14 and is found in a conventional lever configuration, without reduction. The displacement of the cam 14 is then fast.
  • the figure 5 represents another embodiment of the insurance device, including cooperating parts between the lever 58 and the flange 18 to ensure the reduction at the start of the release stroke of the cam 14.
  • the flange 18 no longer comprises the groove 102 terminated by an abutment face 104. Instead, the flange comprises a stud 104 'perpendicular to the plane of the flange, disposed substantially at the same location as the abutment wall 104 of the preceding figures .
  • the lever 58 no longer has the lug 100. Instead it has a spout 100 'substantially at the same location as the lug 100 of the previous figures.
  • the spout 100 ' is arranged to come into contact with the pin 104' between the axes 32 and 60 when the lever 58 is unfolded towards its active position, shown in FIG. figure 5 , where can begin the displacement of the cam 14 with reduction.
  • the cam 14 is driven directly by the lever 58 over the remainder of its stroke.
  • This is provided by a key 60-1 of the axis 60 disposed in an enlarged groove 58-1 of the lever.
  • the key 60-1 and the groove 58-1 are configured so that the key is driven by a wall of the groove as the spout 100 'disengages from the stud 104'.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Emergency Lowering Means (AREA)
  • Maintenance And Inspection Apparatuses For Elevators (AREA)

Abstract

The device has a cam (14) for clamping a rope when the rope is under tension, and a lever (58) acting on the cam to progressively release the rope by manual action on the lever. The lever acts on the cam with a geared-down effect in an initial part of release travel of the lever and with a direct effect in a final part of travel of the lever such that relative displacement of the cam with respect to the lever is smaller in the initial part than in the final part. A support of the lever has a stud (100) placed in a ring (106) having a diameter less than a diameter of the pin.

Description

Domaine technique de l'inventionTechnical field of the invention

L'invention est relative à un dispositif d'assurance autobloquant pour corde, pouvant servir de descendeur ou bien à assurer un grimpeur. Un tel dispositif est destiné à se bloquer sur la corde automatiquement dès que la corde est sous tension. Si l'utilisateur souhaite faire défiler la corde, il doit intervenir manuellement sur un levier.The invention relates to a self-locking rope insurance device, which can serve as a descender or to ensure a climber. Such a device is intended to lock on the rope automatically as soon as the rope is under tension. If the user wants to scroll the rope, he must intervene manually on a lever.

État de la techniqueState of the art

La figure 1 représente partiellement et en situation un dispositif autobloquant classique, tel que décrit dans le brevet EP0398819 . Le dispositif comporte une paire de poulies 12, 14 logées entre deux flasques parallèles, dont un seul 18 est représenté, ci-après dénommé flasque de base. La première poulie 12 est montée immobile en rotation au moyen d'un organe de fixation 22 sur le flasque de base 18. La poulie 12 est équipée d'un secteur supérieur circulaire ayant une gorge de guidage de la corde 26, et d'une surface de freinage 28, située en regard de la deuxième poulie 14. La surface de freinage 28 est sensiblement plane.The figure 1 represents partially and in situation a conventional self-locking device, as described in the patent EP0398819 . The device comprises a pair of pulleys 12, 14 housed between two parallel flanges, of which only one 18 is shown, hereinafter referred to as the base flange. The first pulley 12 is rotatably mounted by means of a fixing member 22 on the base flange 18. The pulley 12 is equipped with a circular upper sector having a guide groove of the rope 26, and a braking surface 28, located opposite the second pulley 14. The braking surface 28 is substantially flat.

La deuxième poulie 14 est solidaire d'une plaque de support 30 montée à pivotement autour d'un axe 32 du flasque 18.The second pulley 14 is secured to a support plate 30 mounted to pivot about an axis 32 of the flange 18.

La poulie 14 est conformée en came, laquelle est excentrée par rapport à l'axe de pivotement 32. Cette came 14 comporte un secteur inférieur circulaire ayant une gorge 34 d'enroulement de la corde 26, cette gorge 34 étant centrée sur un axe fictif, légèrement décalé par rapport à l'axe 32. A l'opposée de la gorge 34, se trouve un coin 36 destiné à coincer la corde 26 contre la surface de freinage 28, lorsque la plaque support 30 tourne dans le sens horaire sous l'effet de la tension de la corde et de la force de frottement de celle-ci sur la came 14.The pulley 14 is cam-shaped, which is eccentric relative to the pivot axis 32. This cam 14 has a circular lower sector having a groove 34 for winding the rope 26, this groove 34 being centered on a fictitious axis slightly opposed to the axis 32. At the opposite of the groove 34, there is a wedge 36 intended to wedge the rope 26 against the braking surface 28, when the support plate 30 rotates clockwise under the effect of the tension of the rope and the friction force of the latter on the cam 14.

Entre le coin 36 et la gorge circulaire 34 de la came 14, s'étendent une deuxième surface de freinage 38, et une surface de guidage 40 de la corde 26. La surface 38 est sensiblement plane, et se trouve plus éloignée de l'axe 32 que la surface 40.Between the wedge 36 and the circular groove 34 of the cam 14, extend a second braking surface 38, and a guide surface 40 of the rope 26. The surface 38 is substantially flat, and is further away from the axis 32 as the surface 40.

La position de l'axe 32 de la came 14 est tel que le coin 36 ne vient jamais en engagement contre la surface de freinage 28 de la poulie 12.The position of the axis 32 of the cam 14 is such that the wedge 36 never comes into engagement with the braking surface 28 of the pulley 12.

Dans une position extrême, de blocage, lorsque la tension de la corde 26 dépasse un seuil de réglage de l'appareil, la plaque 30 pivote jusqu'à ce que les première et deuxième surfaces 28, 38 se retrouvent en regard, parallèles l'une à l'autre, et coincent la corde 26. Cette position intervient lors d'une chute de l'utilisateur.In an extreme blocking position, when the tension of the rope 26 exceeds an adjustment threshold of the apparatus, the plate 30 pivots until the first and second surfaces 28, 38 are found facing each other, parallel to each other. one to another, and wedge the rope 26. This position occurs during a fall of the user.

Entre cette position de blocage et la position libre représentée à la figure 1, on trouve un éventail de positions de freinage, le freinage étant d'autant plus fort que la plaque 30 pivote dans le sens horaire et que le coin 36 vient coincer la corde.Between this blocking position and the free position represented in the figure 1 , there is a range of braking positions, the braking being all the stronger as the plate 30 rotates clockwise and the wedge 36 jams the rope.

La partie inférieure du flasque de base 18 est dotée d'une ouverture 48 à laquelle peut être accroché un mousqueton d'attache (non représenté).The bottom portion of the base flange 18 is provided with an opening 48 to which can be hung a carabiner (not shown).

Un levier de commande 58 est associé à la plaque support 30 pour faire pivoter, par une action manuelle, la came 14 autour de l'axe 32, à partir d'une position de blocage vers une position de déblocage. Le levier de commande 58 est articulé sur la plaque 30 en un axe 60 situé à l'opposée de l'axe 32 par rapport à la gorge 34, et coopère avec un ressort de rappel 62 qui sollicite le levier 58 vers une position de repos en alignement avec les axes 32 et 60. La position de travail du levier 58 est illustrée en trait mixte sur la figure 1, et est obtenue par un abaissement du levier 58 dans le sens anti-horaire, à l'encontre de la force de rappel du ressort 62.A control lever 58 is associated with the support plate 30 to rotate, by a manual action, the cam 14 about the axis 32, from a locking position to an unlocking position. The control lever 58 is articulated on the plate 30 in an axis 60 located opposite the axis 32 relative to the groove 34, and cooperates with a return spring 62 which biases the lever 58 to a rest position in alignment with the axes 32 and 60. The working position of the lever 58 is illustrated in dashed line on the figure 1 , and is obtained by lowering the lever 58 counter-clockwise, against the restoring force of the spring 62.

En fonctionnement, le dispositif est fixé à un utilisateur par un mousqueton passant dans l'ouverture 48, et la corde sortant du dispositif par la came 14 est sous tension, par exemple sous le poids de l'utilisateur lorsque le dispositif est utilisé en descendeur. Cette tension provoque le pivotement de la plaque 30 et de la came 14 dans les sens horaire et le coincement progressif de la corde entre le coin 36 et la surface 28 sans autre action de l'utilisateur. Si l'utilisateur veut continuer sa progression, il doit manuellement décoincer la corde en tirant sur le levier de commande 58 dans le sens anti-horaire.In operation, the device is fixed to a user by a carabiner passing through the opening 48, and the rope exiting the device through the cam 14 is under tension, for example under the weight of the user when the device is used downhill . This tension causes the plate 30 and the cam 14 to pivot in the clockwise directions and the progressive jamming of the rope between the wedge 36 and the surface 28 without any other action by the user. If the user wants to continue his progress, he must manually loosen the rope by pulling the control lever 58 counterclockwise.

Avec ce type de dispositif, la plage utile des positions de freinage se trouve dans un faible débattement du levier 58, de sorte que l'utilisateur rencontre des difficultés à trouver la position de freinage qui lui convient, lui permettant de progresser continûment à la vitesse souhaitée. En outre, l'effort à fournir pour passer la came 14 de la position bloquée à une position où la corde peut commencer à défiler est nettement plus important que l'effort à fournir pour moduler le freinage sur une corde qui défile. Il en résulte que l'utilisateur progresse par à-coups en cherchant en permanence la bonne position entre la position bloquée et la position libre.With this type of device, the useful range of the braking positions is in a low clearance of the lever 58, so that the user has difficulty finding the braking position that suits him, allowing him to progress continuously at the desired speed. In addition, the effort required to pass the cam 14 from the locked position to a position where the rope can begin to scroll is significantly more important than the effort required to modulate the braking on a rope that runs. As a result, the user progresses jerkily while constantly seeking the correct position between the locked position and the free position.

Résumé de l'inventionSummary of the invention

On constate qu'il existe un besoin de prévoir un dispositif d'assurance sur corde permettant à l'utilisateur de trouver facilement une position de freinage autorisant une progression à une vitesse continue souhaitée.It is noted that there is a need to provide a rope insurance device allowing the user to easily find a braking position allowing progression to a desired continuous speed.

Pour satisfaire ce besoin, on prévoit un dispositif d'assurance autobloquant pour corde comprenant une came agencée pour provoquer un blocage de la corde lorsque la corde est sous tension, et un levier agencé pour agir sur la came afin de provoquer un déblocage progressif de la corde par une action manuelle sur le levier. Le levier agit sur la came respectivement avec un effet démultiplié dans une partie initiale de sa course de déblocage, et avec un effet direct dans une partie finale de sa course.To meet this need, there is provided a self-locking rope insurance device comprising a cam arranged to cause a locking of the rope when the rope is under tension, and a lever arranged to act on the cam to cause a progressive release of the rope. rope by manual action on the lever. The lever acts on the cam respectively with a multiplied effect in an initial part of its unlocking stroke, and with a direct effect in a final part of its stroke.

Il en résulte que le déplacement relatif de la came par rapport au déplacement du levier est plus faible dans la partie initiale de la course que dans la partie finale, ce qui permet un réglage précis de l'effort de freinage et de la vitesse de défilement de la corde dans la partie initiale de la course du levier.As a result, the relative displacement of the cam relative to the movement of the lever is lower in the initial part of the race than in the final part, which allows a precise adjustment of the braking force and the speed of scrolling. of the rope in the initial part of the lever stroke.

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 donnés à titre d'exemples non limitatifs et illustrés à l'aide des dessins annexés, dans lesquels :

  • la figure 1, précédemment décrite, représente un dispositif d'assurance autobloquant pour corde classique;
  • la figure 2 représente une vue éclatée en perspective d'un mode de réalisation de dispositif d'assurance amélioré ;
  • la figure 3 représente une vue de face du dispositif de la figure 2, dans une position bloquée sur corde ;
  • les figures 4a et 4b représentent des vues de face du dispositif de la figure 2 respectivement dans une position de régulation de vitesse de défilement de la corde, et dans une position de libération de la corde ; et
  • la figure 5 représente un autre mode de réalisation du dispositif d'assurance.
Other advantages and features will emerge more clearly from the following description of particular embodiments given as non-limiting examples and illustrated with the aid of the accompanying drawings, in which:
  • the figure 1 , previously described, represents a self-locking insurance device for conventional rope;
  • the figure 2 is an exploded perspective view of an improved assurance device embodiment;
  • the figure 3 represents a front view of the device of the figure 2 in a locked position on a rope;
  • the Figures 4a and 4b represent front views of the device of the figure 2 respectively in a position of regulating the speed of travel of the rope, and in a position of release of the rope; and
  • the figure 5 represents another embodiment of the insurance device.

Description d'un mode de réalisation préféré de l'inventionDescription of a preferred embodiment of the invention

La figure 2 représente une vue éclatée en perspective d'un mode de réalisation de dispositif d'assurance permettant une régulation fine de la vitesse de défilement de la corde. On retrouve des éléments ayant les mêmes fonctions que ceux du dispositif classique de la figure 1, désignés par des mêmes références, même s'ils sont parfois de formes différentes.The figure 2 is an exploded perspective view of an embodiment of insurance device for fine regulation of the speed of travel of the rope. We find elements having the same functions as those of the classical device of the figure 1 , designated by the same references, even if they are sometimes of different shapes.

On retrouve notamment le flasque 18 servant de pièce de référence pour le montage des autres éléments. La came 14 et la plaque 30 forment une seule pièce articulée autour de l'axe 32. Cette pièce unique sera ci-après désignée par la came 14.In particular, flange 18 serves as a reference piece for mounting the other elements. The cam 14 and the plate 30 form a single piece hinged about the axis 32. This single piece will hereinafter be designated by the cam 14.

Le levier 58, articulé sur la came 14 par l'axe 60, est représenté en position de repos, replié pour se conformer au contour global du dispositif.The lever 58, articulated on the cam 14 by the axis 60, is shown in the rest position, folded to conform to the overall contour of the device.

Afin de permettre une régulation fine de la vitesse de défilement de la corde, la base du levier 58, du côté opposé à une partie formant poignée, est munie d'un ergot 100 parallèle à l'axe 60. Dans la position de repos représentée du levier, l'ergot 100 est situé du côté opposé à l'axe 32 par rapport à l'axe 60. Cet ergot 100 s'étend vers le bas et dépasse le plan supérieur du flasque 18. Le flasque 18 est évidé en 102 pour permettre le passage de l'ergot 100 sur la plus grande partie de la course du levier 58 entre sa position de repos et sa position active dépliée.In order to allow fine regulation of the running speed of the rope, the base of the lever 58, on the opposite side to a handle portion, is provided with a lug 100 parallel to the axis 60. In the rest position shown of the lever, the lug 100 is located on the opposite side to the axis 32 relative to the axis 60. This lug 100 extends downwardly and exceeds the upper plane of the flange 18. The flange 18 is hollowed out in 102 to allow the passage of the lug 100 over most of the stroke of the lever 58 between its rest position and its unfolded active position.

Le flasque 18 présente une butée 104 terminant l'évidement 102, contre laquelle l'ergot 100 vient en appui lorsque le levier 58 est déplié vers sa position active, comme cela sera décrit plus en détail à l'aide de la figure 4a.The flange 18 has a stop 104 ending the recess 102, against which the lug 100 bears when the lever 58 is unfolded to its active position, as will be described in more detail using the figure 4a .

Afin de limiter le matage du flasque 18 par l'ergot 100 au niveau de l'évidement 102, cet ergot est entouré d'une bague 106 de diamètre interne supérieur au diamètre de l'ergot. Cette bague est flottante et, afin de la maintenir en place, elle est guidée dans une rainure constituée par la paroi de l'évidement 102 et des parois remontantes de la came 14.In order to limit the matting of the flange 18 by the lug 100 at the recess 102, this lug is surrounded by a ring 106 of internal diameter greater than the diameter of the lug. This ring is floating and, in order to hold it in place, it is guided in a groove formed by the wall of the recess 102 and upstanding walls of the cam 14.

Le fonctionnement du dispositif sera mieux compris à l'aide des figures 3 et suivantes.The operation of the device will be better understood with the help of figures 3 and following.

Pour terminer la description de la figure 2, la poulie fixe 12 de la figure 1 est remplacée par une pièce 12 maintenue par l'axe 22 et présentant la surface de freinage 28. La pièce 12 est immobilisée en rotation par une languette 12-1 pénétrant dans une encoche 18-1 du flasque 18.To finish the description of the figure 2 , the fixed pulley 12 of the figure 1 is replaced by a part 12 held by the shaft 22 and having the braking surface 28. The part 12 is immobilized in rotation by a tongue 12-1 penetrating into a notch 18-1 of the flange 18.

Les axes 22 et 32 sont représentés désolidarisés du flasque 18 pour des raisons de visibilité. En configuration normale, ces axes 22 et 32 sont solidaires du flasque 18.The axes 22 and 32 are shown disconnected from the flange 18 for reasons of visibility. In normal configuration, these axes 22 and 32 are integral with the flange 18.

Un deuxième flasque 20 sert à fermer le dispositif et à garder la corde en place. Il est articulé sur le flasque 18 par l'axe 22 pour permettre le retrait et la mise en place de la corde. Il est maintenu en position fermée par un mousqueton (non représenté) inséré par l'orifice 48 du flasque 18 et un orifice conjugué 50 du flasque 20.A second flange 20 serves to close the device and keep the rope in place. It is articulated on the flange 18 by the axis 22 to allow the withdrawal and the establishment of the rope. It is held in the closed position by a carabiner (not shown) inserted through the orifice 48 of the flange 18 and a conjugate orifice 50 of the flange 20.

Une forme en résine moulée 108 remplit l'espace vide non utilisé entre les flasques 18 et 20 et assure la protection du mécanisme.A molded resin shape 108 fills the unused empty space between the flanges 18 and 20 and provides protection for the mechanism.

La figure 3 représente une vue de face du dispositif de la figure 2, avec une corde 26 installée, dans sa position de blocage. Une partie du levier 58 et du flasque 18 n'est pas représentée afin de rendre visible la façon dont la came 14 agit sur la corde 26.The figure 3 represents a front view of the device of the figure 2 with a rope 26 installed, in its locking position. A portion of the lever 58 and the flange 18 is not shown to make visible the way the cam 14 acts on the rope 26.

La came 14 a sensiblement la forme de la came de la figure 1. Elle comporte notamment une partie en coin 36 servant à coincer la corde contre la surface de freinage 28.The cam 14 has substantially the shape of the cam of the figure 1 . It comprises in particular a wedge portion 36 used to wedge the rope against the braking surface 28.

La corde 26 rentre dans le dispositif par la droite, passe sous la came 14, et ressort à gauche entre le coin 36 et la surface de freinage 28. Le dispositif est accroché à un utilisateur par un mousqueton (non représenté) passant dans l'orifice 48. La partie droite de la corde est sous tension, soit par le poids de l'utilisateur lors d'une utilisation du dispositif en descendeur, soit par la traction exercée par une personne à assurer en escalade. Cette tension sollicite la came 14 en rotation anti-horaire autour de l'axe 32, d'où il résulte que le coin 36 vient serrer la corde contre la surface de freinage 28 d'autant plus fort que la tension est importante.The rope 26 enters the device from the right, passes under the cam 14, and leaves left between the wedge 36 and the braking surface 28. The device is hooked to a user by a carabiner (not shown) passing through port 48. The right side of the rope is under tension, either by the weight of the user when using the device descender, or by the traction exerted by a person to ensure climbing. This tension biases the cam 14 anti-clockwise about the axis 32, whereby the wedge 36 tightens the rope against the braking surface 28 the stronger the voltage is important.

Pour sortir de cette position de blocage, l'utilisateur doit faire tourner la came 14 dans le sens horaire autour de l'axe 32, afin d'écarter le coin 36 de la surface de freinage 28. Pour ce faire, il tire sur le levier 58 après l'avoir déplié dans le sens horaire autour de l'axe 60.To exit this locking position, the user must rotate the cam 14 clockwise about the axis 32, to move the corner 36 of the braking surface 28. To do this, it pulls the lever 58 after unfolding it clockwise around the axis 60.

La figure 4a représente le dispositif de la figure 3, avec le levier 58 déplié jusqu'à une position où peut commencer la sollicitation de la came 14 en vue d'un déblocage. Une partie du levier 58 n'est pas représentée afin de voir la position de l'ergot 100. On y voit également la bague 106 entourant l'ergot.The figure 4a represents the device of the figure 3 , with the lever 58 unfolded to a position where can begin the biasing of the cam 14 for unlocking. A portion of the lever 58 is not shown to see the position of the lug 100. It also shows the ring 106 surrounding the lug.

Comme cela est représenté, l'ergot 100 vient en appui sur la butée 104 du flasque 18 entre les axes 32 et 60 de la came et du levier. A partir de cette position, si l'utilisateur tire sur le levier dans le sens horaire, la came 14 est sollicitée dans le sens horaire avec un effort démultiplié par rapport à un agencement classique du levier. Le facteur de démultiplication est égal au rapport de la distance entre l'ergot 100 et le centre de la partie formant poignée du levier, sur la distance entre l'ergot 100 et l'axe 60.As shown, the lug 100 bears against the abutment 104 of the flange 18 between the axes 32 and 60 of the cam and the lever. From this position, if the user pulls the lever clockwise, the cam 14 is biased clockwise with a reduced effort compared to a conventional arrangement of the lever. The reduction factor is equal to the ratio of the distance between the lug 100 and the center of the handle portion of the lever, the distance between the lug 100 and the axis 60.

En outre, le déplacement en rotation de la came 14 par rapport au déplacement en rotation du levier 58 est inversement proportionnel à ce facteur.In addition, the rotational displacement of the cam 14 relative to the rotational movement of the lever 58 is inversely proportional to this factor.

Il résulte de ces effets que l'utilisateur peut en dépensant peu d'énergie exercer un effort important sur la came pour franchir l'effort nécessaire à débloquer la corde, et ensuite ajuster finement la position de la came 14 pour moduler le serrage de la corde et ainsi régler finement la vitesse de défilement de la corde.It follows from these effects that the user can spend little effort exerting a great effort on the cam to overcome the effort required to unlock the rope, and then finely adjust the position of the cam 14 to modulate the tightening of the cam. rope and fine tune the speed of the rope.

En choisissant convenablement la distance entre l'ergot 100 et l'axe 60, et la position de la butée 104, on peut assurer que l'ensemble de la plage utile de réglage soit obtenue par effet de démultiplication, c'est-à-dire tandis que l'ergot 100 reste en appui sur la butée 104.By appropriately choosing the distance between the lug 100 and the axis 60, and the position of the stop 104, it can be ensured that the entire useful range of adjustment is obtained by the effect of reduction, that is to say say while the lug 100 remains in abutment on the stop 104.

A la fin de l'utilisation du dispositif, sur une corde détendue, on souhaite pouvoir dégager rapidement la corde, c'est-à-dire amener la came 14 en butée du côté opposé à la surface de freinage 28.At the end of the use of the device, on a relaxed rope, it is desired to be able to clear the rope quickly, that is to say to bring the cam 14 in abutment on the opposite side to the braking surface 28.

La figure 4b représente le dispositif de la figure 3 dans une position de dégagement, obtenue lorsque l'utilisateur continue à tirer sur le levier dans le sens horaire à partir de la position de la figure 4a. A un moment donné, entre les positions des figures 4a et 4b, l'ergot 100 se désengage de la butée 104 et vient en appui sur une paroi de la came 14, comme le montre la figure 4b. Le levier 58 est alors dans une position de fin de course dépliée sur la came 14 et on se retrouve dans une configuration de levier classique, sans démultiplication. Le déplacement de la came 14 est alors rapide.The figure 4b represents the device of the figure 3 in a release position, obtained when the user continues to pull the lever clockwise from the position of the figure 4a . At a given moment, between the positions of Figures 4a and 4b , the lug 100 disengages from the stop 104 and bears against a wall of the cam 14, as shown in FIG. figure 4b . The lever 58 is then in an end position unfolded on the cam 14 and is found in a conventional lever configuration, without reduction. The displacement of the cam 14 is then fast.

La figure 5 représente un autre mode de réalisation du dispositif d'assurance, notamment des parties coopérantes entre le levier 58 et le flasque 18 pour assurer la démultiplication en début de course de déblocage de la came 14.The figure 5 represents another embodiment of the insurance device, including cooperating parts between the lever 58 and the flange 18 to ensure the reduction at the start of the release stroke of the cam 14.

Par rapport aux figures 2 à 4b, le flasque 18 ne comporte plus la rainure 102 terminée par une face de butée 104. Au lieu de cela, le flasque comporte un téton 104' perpendiculaire au plan du flasque, disposé sensiblement au même emplacement que la paroi de butée 104 des figures précédentes. Le levier 58 ne comporte plus l'ergot 100. Au lieu de cela il comporte un bec 100' sensiblement au même emplacement que l'ergot 100 des figures précédentes.Relative to Figures 2 to 4b , the flange 18 no longer comprises the groove 102 terminated by an abutment face 104. Instead, the flange comprises a stud 104 'perpendicular to the plane of the flange, disposed substantially at the same location as the abutment wall 104 of the preceding figures . The lever 58 no longer has the lug 100. Instead it has a spout 100 'substantially at the same location as the lug 100 of the previous figures.

Le bec 100' est agencé pour venir en contact avec le téton 104' entre les axes 32 et 60 lorsque le levier 58 est déplié vers sa position active, représentée en figure 5, où peut commencer le déplacement de la came 14 avec démultiplication.The spout 100 'is arranged to come into contact with the pin 104' between the axes 32 and 60 when the lever 58 is unfolded towards its active position, shown in FIG. figure 5 , where can begin the displacement of the cam 14 with reduction.

Après avoir tourné le levier 58 dans le sens horaire sur une course initiale, le bec 100' se désengage du téton 104'. A ce moment-là, on souhaite que la came 14 soit entraînée directement par le levier 58 sur le restant de sa course. Cela est assuré par une clavette 60-1 de l'axe 60 disposée dans une rainure élargie 58-1 du levier. La clavette 60-1 et la rainure 58-1 sont configurées de manière que la clavette soit entraînée par une paroi de la rainure au moment où le bec 100' se désengage du téton 104'.After turning the lever 58 clockwise over an initial stroke, the spout 100 'disengages from the pin 104'. At this time, it is desired that the cam 14 is driven directly by the lever 58 over the remainder of its stroke. This is provided by a key 60-1 of the axis 60 disposed in an enlarged groove 58-1 of the lever. The key 60-1 and the groove 58-1 are configured so that the key is driven by a wall of the groove as the spout 100 'disengages from the stud 104'.

Claims (8)

Dispositif d'assurance autobloquant pour corde comprenant : • une came (14) agencée pour provoquer un blocage de la corde (26) lorsque la corde est sous tension ; et • un levier (58) agencé pour agir sur la came afin de provoquer un déblocage progressif de la corde par une action manuelle sur le levier ; caractérisé en ce que le levier agit sur la came respectivement avec un effet démultiplié dans une partie initiale de sa course de déblocage, et avec un effet direct dans une partie finale de sa course, le déplacement relatif de la came par rapport au déplacement du levier étant plus faible dans ladite partie initiale que dans ladite partie finale.Self-locking rope insurance device comprising: A cam (14) arranged to cause a locking of the rope (26) when the rope is under tension; and • a lever (58) arranged to act on the cam to cause a progressive release of the rope by a manual action on the lever; characterized in that the lever acts on the cam respectively with a multiplied effect in an initial part of its release stroke, and with a direct effect in a final part of its stroke, the relative displacement of the cam relative to the movement of the lever being lower in said initial portion than in said final portion. Dispositif selon la revendication 1, comprenant: • un flasque (18) ; • une surface de freinage (28) solidaire du flasque; • la came (14) articulée (32) sur le flasque, comportant une partie excentrée (36) agencée pour pincer la corde (26) contre la surface de freinage lorsque la came tourne dans un sens de blocage ; • le levier (58) articulé (60) sur la came, ayant une position de repos repliée et une position active permettant de faire tourner la came dans un sens de déblocage ; caractérisé en ce que le levier comporte un appui (100, 100') agencé pour venir en contact contre une butée (104, 104') du flasque sensiblement entre les axes d'articulation de la came et du levier lorsque le levier est tourné de sa position repliée vers sa position active.Device according to claim 1, comprising: • a flange (18); • a braking surface (28) integral with the flange; • the cam (14) hinged (32) on the flange, having an eccentric portion (36) arranged to clamp the rope (26) against the braking surface when the cam rotates in a locking direction; • the lever (58) articulated (60) on the cam, having a folded rest position and an active position for rotating the cam in an unlocking direction; characterized in that the lever comprises a support (100, 100 ') arranged to come into contact with an abutment (104, 104') of the flange substantially between the axes of articulation of the cam and the lever when the lever is turned from its folded position towards its active position. Dispositif selon la revendication 2, caractérisé en ce que l'appui (100, 100') du levier vient en contact contre la butée (104, 104') du flasque (18) avant que le levier (58) n'atteigne une position de fin de course de rotation sur la came (14).Device according to claim 2, characterized in that the support (100, 100 ') of the lever comes into contact against the stop (104, 104') of the flange (18) before the lever (58) reaches a position end of rotation stroke on the cam (14). Dispositif selon la revendication 2, caractérisé en ce que l'appui du levier comprend un ergot (100) disposé dans une bague flottante (106) de diamètre interne supérieur au diamètre de l'ergot.Device according to claim 2, characterized in that the support of the lever comprises a lug (100) disposed in a floating ring (106) of internal diameter greater than the diameter of the lug. Dispositif selon la revendication 4, caractérisé en ce que la came (14) et le flasque (18) comportent des parois délimitant une rainure (102) dans laquelle l'ergot (100) se déplace avec la bague entre les positions repliée et active du levier (58).Device according to claim 4, characterized in that the cam (14) and the flange (18) comprise walls delimiting a groove (102) in which the lug (100) moves with the ring between the folded and active positions of the lever (58). Dispositif selon la revendication 2, caractérisé en ce que l'appui du levier est formé par une extension en bec (100') du levier et la butée est formée par un téton (104') solidaire du flasque.Device according to claim 2, characterized in that the support of the lever is formed by a spout extension (100 ') of the lever and the stop is formed by a stud (104') integral with the flange. Dispositif selon la revendication 3, caractérisé en ce que la position de fin de course de rotation du levier (58) sur la came est définie par l'appui (100) du levier entrant en contact avec une paroi de la came (14).Device according to claim 3, characterized in that the position of end of the rotational stroke of the lever (58) on the cam is defined by the support (100) of the lever coming into contact with a wall of the cam (14). Dispositif selon la revendication 3, caractérisé en ce que la position de fin de course de rotation du levier (58) sur la came est définie par une clavette (60-1) de l'axe du levier entrant en contact avec une paroi d'une rainure (58-1) du levier.Device according to Claim 3, characterized in that the end position of the lever (58) on the cam is defined by a key (60-1) of the lever shaft coming into contact with a wall of the lever. a groove (58-1) of the lever.
EP10354053.0A 2009-09-25 2010-09-23 Self-locking rope safety device Active EP2301631B1 (en)

Applications Claiming Priority (1)

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FR0904593A FR2950536B1 (en) 2009-09-25 2009-09-25 AUTOBLOATING ROPE INSURANCE DEVICE

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EP2301631A1 true EP2301631A1 (en) 2011-03-30
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CN (1) CN102029025B (en)
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EP3124081A2 (en) 2015-07-31 2017-02-01 Zedel Belay device on rope for use in belay and toprope mode
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WO2015189066A1 (en) 2014-06-11 2015-12-17 Pascal Ollivier Apparatus for suspending a load on a rope
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EP3056248A1 (en) 2015-02-11 2016-08-17 Zedel Descender device on rope with gear reduction and panic lock
US10716960B2 (en) 2015-02-11 2020-07-21 Zedel Belay descender device on a rope with gearing-down and anti-panic blocking
EP3124081A2 (en) 2015-07-31 2017-02-01 Zedel Belay device on rope for use in belay and toprope mode
FR3039410A1 (en) * 2015-07-31 2017-02-03 Zedel ROPE INSURING DEVICE FOR USE IN INSURER AND MOULINETTE MODE
EP3124081A3 (en) * 2015-07-31 2017-02-08 Zedel Belay device on rope for use in belay and toprope mode
EP3141285A1 (en) 2015-09-08 2017-03-15 Carlo Adam Self-locking safety device for climbing rope

Also Published As

Publication number Publication date
CN102029025A (en) 2011-04-27
ES2664582T3 (en) 2018-04-20
FR2950536A1 (en) 2011-04-01
FR2950536B1 (en) 2011-10-07
CN102029025B (en) 2014-10-29
US20110073417A1 (en) 2011-03-31
US8584814B2 (en) 2013-11-19
EP2301631B1 (en) 2018-02-28

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