EP2191870B1 - Blocking device with cam for belaying a fixed rope - Google Patents

Blocking device with cam for belaying a fixed rope Download PDF

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Publication number
EP2191870B1
EP2191870B1 EP09354045A EP09354045A EP2191870B1 EP 2191870 B1 EP2191870 B1 EP 2191870B1 EP 09354045 A EP09354045 A EP 09354045A EP 09354045 A EP09354045 A EP 09354045A EP 2191870 B1 EP2191870 B1 EP 2191870B1
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EP
European Patent Office
Prior art keywords
pivot
lock
actuating lever
rope
ascender device
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EP09354045A
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German (de)
French (fr)
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EP2191870A1 (en
Inventor
Arnaud Delaittre
Alain Maurice
Paul Petzl
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Zedel SAS
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Zedel SAS
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    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B1/00—Devices for lowering persons from buildings or the like
    • A62B1/06—Devices for lowering persons from buildings or the like by making use of rope-lowering devices
    • A62B1/14—Devices for lowering persons from buildings or the like by making use of rope-lowering devices with brakes sliding on the rope

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Emergency Lowering Means (AREA)
  • Financial Or Insurance-Related Operations Such As Payment And Settlement (AREA)
  • Mechanical Control Devices (AREA)

Abstract

The device (10) has a connecting part arranged between a pivot (16) of an actuating lever (14) and a device body (12) to move the lever between an inactive position and an active position. A double lock secures the pivot in a pair of recesses when the lever in the active position or allows the pivot to escape from the recesses, when the lever is moved to the inactive position. The double lock has a pair of locks to secure two opposite ends of the pivot in the recesses, where one of the locks is associated with an unlocking tab to unlock the other lock.

Description

Domaine technique de l'inventionTechnical field of the invention

L'invention est relative à un dispositif bloqueur pour l'assurage sur corde fixe, comprenant un corps à goulotte pour le passage de la corde, et un levier d'actionnement ayant un pivot, une came de coincement de la corde, et un orifice pour l'attache d'un moyen de sécurité.The invention relates to a locking device for belaying on a fixed rope, comprising a chute body for the passage of the rope, and an actuating lever having a pivot, a jamming cam of the rope, and an orifice. for attaching a security means.

Un tel bloqueur est destiné à la progression sécurisée sur corde fixe, et à la réalisation de systèmes de mouflage ou de hissage.Such a blocker is intended for secure progression on fixed rope, and the realization of hauling systems or hoisting.

État de la techniqueState of the art

Un bloqueur connu sous la dénomination commerciale Microcender de PETZL (marque déposée), comporte un étrier en U formant une goulotte, un levier à came de blocage, et un axe amovible permettant d'installer ou de retirer le bloqueur en tout point de la corde. Le levier et l'axe restent reliés au corps du bloqueur par un lien souple pour les rendre imperdables après démontage de l'axe.A blocker known under the trade name Microcender of PETZL (registered trademark), comprises a U-shaped stirrup forming a chute, a locking cam lever, and a removable shaft for installing or removing the blocker at any point of the rope. . The lever and the shaft remain connected to the body of the blocker by a flexible link to make them captive after disassembly of the axis.

Le document EP 678310 concerne un appareil antichute verrouillable automatiquement sur une corde de sécurité. Il comporte :

  • un corps à goulotte pour le passage de la corde,
  • un levier d'actionnement ayant un pivot, une came de coincement de la corde, et un orifice pour l'attache d'un moyen de sécurité,
  • un élément de liaison agencé entre le pivot et le corps pour déplacer le levier d'actionnement entre une position inactive d'introduction de la corde dans la goulotte, et une position active de logement des extrémités du pivot dans des alvéoles alignés du corps jouant le rôle de paliers,
  • un verrou pour assurer le maintien du pivot dans les alvéoles dans ladite position active, ou pour autoriser son échappement lors du passage vers la position inactive dudit levier d'actionnement.
The document EP 678310 is a fall arrest device automatically lockable on a safety rope. It comprises :
  • a trunking body for the passage of the rope,
  • an operating lever having a pivot, a wedging cam of the rope, and an opening for attaching a security means,
  • a connecting element arranged between the pivot and the body for moving the actuating lever between an inactive position of introduction of the rope into the chute, and an active position for housing the ends of the pivot in aligned cells of the body playing the role of bearings,
  • a latch for maintaining the pivot in the cells in said active position, or to allow its escape when passing to the inactive position of said actuating lever.

La réalisation d'un tel appareil est compliquée car l'extrémité libre de l'élément de liaison qui ne porte pas la came, est montée à rotation autour d'un axe coulissant, lequel est chargé élastiquement en direction opposée à celle des alvéoles.The realization of such an apparatus is complicated because the free end of the connecting element which does not carry the cam, is rotatably mounted about a sliding axis, which is resiliently loaded in the direction opposite to that of the cells.

Le document US 4034828 mentionne également un dispositif bloqueur à came, équipé d'un verrou pour assurer le maintien du pivot dans deux alvéoles opposés du corps. La liaison du levier d'actionnement avec le corps du bloqueur est assurée par une chaînette souple le rendant imperdable après dégagement du pivot.The document US 4034828 also mentions a cam lock device, equipped with a latch for maintaining the pivot in two opposite cells of the body. The link of the actuating lever with the blocker body is provided by a flexible chain making it captive after release of the pivot.

Objet de l'inventionObject of the invention

L'objet de l'invention consiste à réaliser un dispositif bloqueur à came facile à manipuler, pouvant être mis en place rapidement sur une corde fixe d'assurage, et d'améliorer la sécurité.The object of the invention is to provide a cam lock device easy to handle, can be set up quickly on a fixed rope belay, and improve safety.

Le dispositif bloqueur selon l'invention est caractérisé en ce que le verrou est double comprenant un premier verrou et un deuxième verrou pour retenir les deux extrémités opposées du pivot dans les alvéoles, chaque verrou étant associé à une patte de déverrouillage pour son déblocage.The blocking device according to the invention is characterized in that the lock is double comprising a first lock and a second lock to retain the locks. two opposite ends of the pivot in the cells, each latch being associated with an unlocking tab for unlocking.

La présence du double verrou et du bras de liaison permet de dégager et d'insérer rapidement le pivot dans les alvéoles. La mise en place de la corde dans la goulotte est ainsi facilitée dans la position inactive, et le maintien du pivot par le double verrou garantit la sécurité en position active.The presence of the double bolt and the connecting arm allows to quickly release and insert the pivot in the cells. The installation of the rope in the chute is thus facilitated in the inactive position, and the maintenance of the pivot by the double lock ensures safety in the active position.

Selon un mode de réalisation préférentiel, l'élément de liaison est formé par un bras articulé, et le premier verrou est monté à pivotement sur un premier axe, lequel traverse une boutonnière du bras de liaison. Un deuxième verrou est monté à pivotement sur un deuxième axe du côté opposé de la goulotte. Le bras de liaison s'étend dans un plan parallèle au levier d'actionnement, et coopère avec une butée au voisinage de l'orifice. Chaque verrou est pourvu d'une patte de déverrouillage destinée à le faire pivoter vers une position de libération à l'encontre de la force de rappel de ressorts de torsion.According to a preferred embodiment, the connecting element is formed by an articulated arm, and the first latch is pivotally mounted on a first axis, which passes through a buttonhole of the connecting arm. A second latch is pivotally mounted on a second axis on the opposite side of the chute. The link arm extends in a plane parallel to the actuating lever, and cooperates with a stop near the orifice. Each latch is provided with an unlocking tab for pivoting it to a release position against the torsion spring biasing force.

Selon une autre caractéristique de l'invention, le corps est équipé d'une fente pour l'insertion du bras de liaison lors du passage entre les positions active et inactive, ladite fente étant située à côté de la goulotte.According to another characteristic of the invention, the body is equipped with a slot for the insertion of the connecting arm during the passage between the active and inactive positions, said slot being located next to the chute.

L'élément de liaison peut bien entendu être remplacé par tout autre liaison équivalente.The link element can of course be replaced by any other equivalent link.

Description sommaire des dessinsBrief description of the drawings

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

  • la figure 1 est une vue en coupe verticale du dispositif bloqueur avec le levier d'actionnement représenté en position active de blocage de la corde ;
  • les figures 2 à 4 montrent des vues en perspective sous différents angles du dispositif bloqueur de la figure 1 ;
  • la figure 5 représente une vue en perspective et en coupe partielle du corps du dispositif bloqueur, avec le levier d'actionnement occupant la position inactive après échappement du pivot de ses paliers ;
  • la figure 6 est une vue identique de la figure 5 avec le levier d'actionnement occupant la position active après l'introduction du pivot dans les paliers ;
  • la figure 7 montre une vue en coupe transversale selon la ligne 7-7 du dispositif bloqueur de la figure 2 ;
  • les figures 8 et 9 représentent des vues identiques de la figure 6, lors du passage du pivot du levier d'actionnement vers la position active ;
  • les figures 10 et 11 sont des vues en perspective d'une variante de réalisation, respectivement en position active et en position inactive.
Other advantages and features will emerge more clearly from the following description of two embodiments of the invention given as non-limiting examples, and represented in the accompanying drawings, in which:
  • the figure 1 is a vertical sectional view of the blocking device with the operating lever shown in the active position of locking the rope;
  • the Figures 2 to 4 show perspective views from different angles of the blocker device of the figure 1 ;
  • the figure 5 is a perspective view in partial section of the body of the blocking device, with the actuating lever occupying the inactive position after escaping the pivot of its bearings;
  • the figure 6 is an identical view of the figure 5 with the actuating lever occupying the active position after the introduction of the pivot into the bearings;
  • the figure 7 shows a cross-sectional view along the line 7-7 of the blocking device of the figure 2 ;
  • the Figures 8 and 9 represent identical views of the figure 6 during the transition from the pivot of the actuating lever to the active position;
  • the Figures 10 and 11 are perspective views of an alternative embodiment, respectively in the active position and in the inactive position.

Description détaillée de l'inventionDetailed description of the invention

En référence aux figures 1 à 9, un dispositif bloqueur 10 est utilisé en escalade pour l'assurage d'un grimpeur le long d'une corde 11 fixe. Il comporte un corps 12 métallique doté d'une goulotte 13 centrale de passage de la corde 11, et un levier d'actionnement 14 à came 15 de blocage.With reference to Figures 1 to 9 , a blocking device 10 is used in climbing for belaying a climber along a fixed rope 11. It comprises a metal body 12 with a central chute 13 for the passage of the rope 11, and an actuating lever 14 with a locking cam 15.

Le levier d'actionnement 14 peut basculer autour d'un pivot 16 transversal entre une première position de coincement (figures 1 et 8), et une deuxième position de déblocage de la corde 11 (figure 9). La came 15 s'étend à l'extrémité interne du levier d'actionnement 14 en regard du fond de la goulotte 13, de manière à bloquer la corde 11 dans la première position. A l'extrémité opposée de la came 15, le levier d'actionnement 14 est muni d'un orifice 17 circulaire accessible depuis l'extérieur, pour l'attache d'un moyen de sécurité destiné à être raccordé au baudrier du grimpeur.The actuating lever 14 can swing around a transverse pivot 16 between a first jamming position ( figures 1 and 8 ), and a second unlocking position of the rope 11 ( figure 9 ). The cam 15 extends to the inner end of the actuating lever 14 facing the bottom of the chute 13, so as to lock the rope 11 in the first position. At the opposite end of the cam 15, the actuating lever 14 is provided with a circular orifice 17 accessible from the outside, for the attachment of a safety means intended to be connected to the climbing harness.

Le moyen de sécurité peut être un mousqueton, une cordelette ou une sangle. La surface de la came 15 venant en contact avec la corde 11, comporte une pluralité de nervures ou de picots.The security means may be a carabiner, a rope or a strap. The surface of the cam 15 coming into contact with the rope 11, has a plurality of ribs or spikes.

Après l'insertion de la corde 11 dans la goulotte 13, le dispositif bloqueur 10 permet le libre coulissement du grimpeur vers le haut, et assure un effet de blocage vers le bas. Un ressort de rappel 18 (figure 7) formé à titre d'exemple par un ressort de torsion, est agencé coaxialement autour du pivot 16 pour solliciter le levier d'actionnement 14 en direction de la goulotte 13.After insertion of the rope 11 into the chute 13, the blocking device 10 allows the free sliding of the climber upwards, and ensures a locking effect downwards. A return spring 18 ( figure 7 ) formed by way of example by a torsion spring, is arranged coaxially around the pivot 16 to urge the actuating lever 14 in the direction of the chute 13.

Sur le pivot 16 est articulé un élément de liaison EL formé à titre d'exemple par un bras 19 rigide relié au corps 12, et coopérant avec une butée 20 au voisinage de l'orifice 17 du levier d'actionnement 14. Le bras 19 de l'élément de liaison EL s'étend dans un plan parallèle au levier d'actionnement 14 avec un décalage latéral, et est pourvu d'une boutonnière 21 oblongue traversée par un premier axe 22 fixe solidaire du corps 12.On the pivot 16 is articulated a connecting element EL formed by way of example by a rigid arm 19 connected to the body 12, and cooperating with a stop 20 in the vicinity of the orifice 17 of the actuating lever 14. The arm 19 the EL connecting member extends in a plane parallel to the actuating lever 14 with a lateral offset, and is provided with an oblong slot 21 traversed by a fixed first fixed axis 22 of the body 12.

Le corps 12 est équipé d'une fente 23 pour le passage du bras de liaison 19, ladite fente étant située à côté de la goulotte 13 et parallèlement à cette dernière. L'intérieur du corps 12 comporte aussi une paire d'alvéoles 24 alignés dans la direction transversale pour servir de paliers au pivot 16 du levier d'actionnement 14.The body 12 is equipped with a slot 23 for the passage of the connecting arm 19, said slot being located next to the chute 13 and parallel to the latter. The interior of the body 12 also comprises a pair of cells 24 aligned in the transverse direction to serve as bearings to the pivot 16 of the actuating lever 14.

Deux verrous 25, 26 sont montés à pivotement de part et d'autre de la goulotte 13, respectivement sur le premier axe 22 et un deuxième axe 26 pour retenir les extrémités opposées du pivot 16 dans les alvéoles 24. Les deux axes 22, 26 sont alignés et indépendants l'un de l'autre. Chaque verrou 25, 26 est sollicité vers la position de retenue par un ressort de torsion 28, 29. Une patte de déverrouillage 30, 31 est prévue pour faire pivoter chaque verrou 25, 26 vers une position de libération du pivot 19, à l'encontre de la force de rappel des ressorts 28, 29 correspondants.Two latches 25, 26 are pivotally mounted on either side of the chute 13, respectively on the first axis 22 and a second axis 26 to retain the opposite ends of the pivot 16 in the cells 24. The two axes 22, 26 are aligned and independent of each other. Each latch 25, 26 is biased toward the retaining position by a torsion spring 28, 29. An unlocking tab 30, 31 is provided to rotate each lock 25, 26 to a position of release of the pivot 19, against the restoring force of the corresponding springs 28, 29.

Le levier d'actionnement 14 avec son pivot 16 et sa came 15 est ainsi déplaçable entre une position active et une position inactive par l'intermédiaire du bras de liaison 19 articulé au corps 12.The actuating lever 14 with its pivot 16 and its cam 15 is thus movable between an active position and an inactive position via the linkage arm 19 articulated to the body 12.

La position inactive est illustrée sur la figure 5, le levier d'actionnement 14 étant écarté au maximum de la goulotte 13, et restant attaché au corps 12 par le bras de liaison 19, lequel peut néanmoins basculer librement autour du premier axe 22. L'insertion de la corde 11 dans la goulotte 13 est ainsi facilitée lorsque la boutonnière 21 du bras de liaison 19 se trouve en fin de course sur le premier axe 22. L'installation du dispositif bloqueur 10 sur la corde 11 est ainsi possible à tout moment.The inactive position is illustrated on the figure 5 , the actuating lever 14 being spaced as far as possible from the chute 13, and remaining attached to the body 12 by the linkage arm 19, which can nonetheless swing freely around the first axis 22. The insertion of the rope 11 into the chute 13 is thus facilitated when the buttonhole 21 of the linkage arm 19 is at the end of travel on the first axis 22. The installation of the blocking device 10 on the rope 11 is thus possible at any time.

La position active est représentée sur la figure 6, dans laquelle le pivot 16 est logé dans les alvéoles 24, et maintenu en place par les deux verrous 25, 26 se trouvant en position de retenue sous l'action de leurs ressorts 28, 29 de rappel respectifs. La came 15 peut alors occuper soit la position de coincement (figure 1) lorsqu'une force F1 est appliquée à l'extrémité du levier d'actionnement 14 (en cas de chute du grimpeur), soit la deuxième position de déblocage autorisant le libre coulissement du dispositif bloqueur 10 le long de la corde 11 lorsque le grimpeur l'entraîne vers le haut.The active position is represented on the figure 6 in which the pivot 16 is housed in the cells 24, and held in place by the two locks 25, 26 being in the retaining position under the action of their respective springs 28, 29. The cam 15 can then occupy either the wedging position ( figure 1 ) when a force F1 is applied to the end of the actuating lever 14 (in the event of the climber's fall), or the second unlocking position allowing the free sliding of the locking device 10 along the rope 11 when the climber pull him up.

Le passage de la position active vers la position inactive intervient après déblocage préalable des verrous 25, 26 vers la position de libération (voir flèche F2 sur figure 8), suivi d'un mouvement de soulèvement du levier d'actionnement 14 provoquant l'échappement du pivot 16. Ce dernier quitte les alvéoles 24 jouant le rôle de paliers, et libère le levier d'actionnement 14 qui reste néanmoins attaché au corps 12 par le bras de liaison 19 (figures 9 et 5).The transition from the active position to the inactive position occurs after unlocking locks 25, 26 to the release position (see arrow F2 on figure 8 ), followed by a lifting movement of the actuating lever 14 causing the escapement of the pivot 16. The latter leaves the cells 24 acting as bearings, and releases the actuating lever 14 which nevertheless remains attached to the body 12 by the connecting arm 19 ( figures 9 and 5 ).

Le passage inverse de la position inactive vers la position active s'effectue par une poussée du levier d'actionnement 14 en direction de la goulotte 13. La réaction des extrémités du pivot 16 sur les verrous 25, 26 provoque leur recul vers la position de libération, et autorise la mise en place du pivot 16 dans les alvéoles 24. Le pivot 16 est alors centré et maintenu dans ses paliers grâce au retour automatique des verrous 25, 26 vers la position de retenue.The reverse passage from the inactive position to the active position is effected by a push of the actuating lever 14 in the direction of the chute 13. The reaction of the ends of the pivot 16 on the locks 25, 26 causes their retraction towards the position of release, and authorizes the establishment of the pivot 16 in the cells 24. The pivot 16 is then centered and maintained in its bearings by the automatic return of the locks 25, 26 to the retaining position.

Selon la variante des figures 10 et 11, l'élément de liaison EL du dispositif bloqueur 100 est constitué par un câble 32 fixé au levier d'actionnement 14 et au corps 12. Le câble 32 sert à la fois de liaison imperdable, et de moyen de rappel vers la position inactive du levier d'actionnement 14 après déblocage préalable des pattes de déverrouillage 31 des verrous.According to the variant of Figures 10 and 11 the connecting element EL of the blocking device 100 is constituted by a cable 32 fixed to the actuating lever 14 and to the body 12. The cable 32 serves both as a captive connection, and a return means to the inactive position of the actuating lever 14 after prior release of the unlocking tabs 31 of the locks.

Claims (8)

  1. An ascender device for belaying on a fixed rope, comprising:
    - a body (12) with a trough (13) for the rope (11) to pass through,
    - an actuating lever (14) having a pivot (16), a cam (15) for clamping the rope, and a hole (17) for attaching a safety means,
    - a connecting part (EL) arranged between the pivot (16) and the body (12) to move the actuating lever (14) between an inactive position in which the rope (11) is inserted in the trough (13) and an active position in which the ends of the pivot (16) are housed in aligned recesses (24) of the body (12) acting as bearings,
    - a lock (25, 26) to perform securing of the pivot (16) in the recesses (24) in said active position or to allow it to escape when moving to the inactive position of said actuating lever (14),
    characterized in that the lock is double comprising a first lock (25) and a second lock (26) to secure the two opposite ends of the pivot (16) in the recesses, each lock being associated with an unlocking tab (30, 31 ) to unlock the latter.
  2. The ascender device according to claim 1, characterized in that the connecting part (EL) is formed by a rigid connecting arm (19) articulated on the pivot (16) and body (12).
  3. The ascender device according to claim 2, characterized in that the first lock (25) is mounted pivoting on a first pin (22) through which a button-hole (21) of the connecting arm (19) passes.
  4. The ascender device according to claim 3, characterized in that the second lock (26) is mounted pivoting on a second pin (27) which is aligned in the transverse direction with the first pin (22).
  5. The ascender device according to claim 3, characterized in that a torsion spring (28, 29) is associated with each lock (25, 26) to bias it to a position securing the pivot (16), and that the trough (13) is located between the two locks (25, 26).
  6. The ascender device according to any one of claims 2 to 5, characterized in that the connecting arm (19) extends in a plane parallel to the actuating lever (14) and operates in conjunction with a stop (20) in proximity to the hole (17).
  7. The ascender device according to claim 6, characterized in that the body (12) is equipped with a slot (23) for insertion of the connecting arm (19) when moving between the active and inactive positions, said slot being situated on the same side as the trough (13).
  8. The ascender device according to claim 1, characterized in that the connecting part (EL) is formed by a cable (32).
EP09354045A 2008-11-27 2009-10-28 Blocking device with cam for belaying a fixed rope Active EP2191870B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0806664A FR2938771B1 (en) 2008-11-27 2008-11-27 CAM BLOCKING DEVICE FOR FIXED ROPE INSURANCE

Publications (2)

Publication Number Publication Date
EP2191870A1 EP2191870A1 (en) 2010-06-02
EP2191870B1 true EP2191870B1 (en) 2011-08-03

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EP09354045A Active EP2191870B1 (en) 2008-11-27 2009-10-28 Blocking device with cam for belaying a fixed rope

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US (1) US8225905B2 (en)
EP (1) EP2191870B1 (en)
CN (1) CN101745190B (en)
AT (1) ATE518566T1 (en)
ES (1) ES2370969T3 (en)
FR (1) FR2938771B1 (en)

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ATE518566T1 (en) 2011-08-15
CN101745190B (en) 2013-12-11
FR2938771B1 (en) 2010-12-31
EP2191870A1 (en) 2010-06-02
US8225905B2 (en) 2012-07-24
FR2938771A1 (en) 2010-05-28
US20100126802A1 (en) 2010-05-27
CN101745190A (en) 2010-06-23
ES2370969T3 (en) 2011-12-26

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