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EP0398819A1 - Self arresting rope safety device - Google Patents

Self arresting rope safety device Download PDF

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Publication number
EP0398819A1
EP0398819A1 EP90420215A EP90420215A EP0398819A1 EP 0398819 A1 EP0398819 A1 EP 0398819A1 EP 90420215 A EP90420215 A EP 90420215A EP 90420215 A EP90420215 A EP 90420215A EP 0398819 A1 EP0398819 A1 EP 0398819A1
Authority
EP
European Patent Office
Prior art keywords
rope
pulley
support plate
flange
insurance device
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
EP90420215A
Other languages
German (de)
French (fr)
Other versions
EP0398819B1 (en
Inventor
Pierre Petzl
Paul Petzl
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.)
Cambio Ragione Sociale zedel
Original Assignee
Petzl SA
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 Petzl SA filed Critical Petzl SA
Publication of EP0398819A1 publication Critical patent/EP0398819A1/en
Application granted granted Critical
Publication of EP0398819B1 publication Critical patent/EP0398819B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B29/00—Apparatus for mountaineering
    • A63B29/02—Mountain guy-ropes or accessories, e.g. avalanche ropes; Means for indicating the location of accidentally buried, e.g. snow-buried, persons
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/39—Cord and rope holders
    • Y10T24/3936—Pivoted part
    • Y10T24/394—Cam lever
    • Y10T24/3951—Dual cam

Definitions

  • the invention relates to a self-locking insurance device for a rope, comprising: a first base flange equipped with a first pulley or fixed stud, which is offset with respect to a hinge axis extending perpendicular to the first flange, a second pulley secured to a support plate mounted with limited pivoting around the axis in a plane parallel to the base flange, - a control handle associated with the support plate to ensure manual release of the rope, - a second retractable flange arranged to authorize the winding and the passage of the rope between the first and second pulleys, a first braking surface arranged on the first pulley, against which the rope is pressed by a boss of the second pulley when the support plate is driven by the tension of the rope towards a first locking position, - And a return spring urging the support plate in the unlocking direction towards a rest position.
  • Such a device is known from document FR 2451 752 corresponding to the STOP descender marketed by the applicant.
  • the reaction of the rope urges the second pulley towards a single locking position, in which the boss wedges the rope against the first braking surface.
  • a stop for limiting the pivoting stroke is arranged on the support plate to stop the second pulley in this position. The effect of jamming by the boss can nevertheless damage the rope during heavy shocks following repeated falls.
  • the object of the invention is to provide an insurance device which can be used as a descender or a blocker, preventing any premature wear of the rope.
  • the insurance device is characterized in that the second pulley is shaped as a cam having a second braking surface intended to cooperate with the first braking surface, following the continued pivoting movement of the support plate towards a second locking position, the passage from the first locking position to the second locking position taking place when the tension of the rope exceeds a predetermined threshold.
  • the second braking surface then takes over from the boss so that the effect of the rope jamming against the first braking surface is greater in the second locking position than in the first.
  • the threshold for passing from the first locking position to the second locking position depends on the hardness of the return spring of the support plate.
  • the first and second braking surfaces extend substantially parallel to each other in the second rope locking position. The jamming of the rope over a long span prevents it from being worn during heavy shocks.
  • the passage threshold between the two blocking positions can advantageously be adjusted by means of a device for adjusting the preload of the return spring of the support plate.
  • a safety device 10 for rope comprises a pair of pulleys 12,14, housed in a transverse gap 16 formed between two parallel flanges 18,20.
  • the first pulley 12 is mounted fixed by means of a fixing member 22 on the first base flange 18, while being immobilized in rotation.
  • the first pulley 12 is equipped with a circular upper sector having a groove 24 for guiding the rope 26, and with a first braking surface 28, located opposite the second pulley 14.
  • the first braking surface 28 is substantially straight, extending perpendicular to the base flange 18.
  • the second pulley 14 is secured to a movable support plate 30, capable of pivoting about an axis 32 projecting from the flange 18.
  • the support plate 30 is separated from the base flange 18 by a small axial clearance, allowing movement limited pivoting of the plate 30, in a deflection plane parallel to the flange 18.
  • the second pulley 14 is shaped as a cam, which is eccentric relative to the pivot axis 32.
  • the pulley 14 has a circular lower sector having a groove 34 for winding the cord 26, said groove 34 being centered on an axis fictitious, slightly offset from the pivot axis 32.
  • Opposite the groove 34 there is a boss 36 intended to wedge the rope 26 against the first braking surface 28, when the support plate 30 is in an intermediate position corresponding to a first locking position (fig.6 ).
  • the second surface 38 is substantially rectilinear, and is more distant of the axis 32 as the third surface 40.
  • the positioning of the axis 32 of the second pulley 14 is such that the boss 36 never comes into engagement against the first braking surface 28 of the pulley 12.
  • the passage space of the cord 26 between the first surface 28 and the boss 36 is minimum, so as to ensure a first blocking when the value of the tension exerted on the cord 26 is less than a predetermined threshold.
  • the support plate 30 and pulley 14 assembly is capable of continuing the pivoting movement beyond the intermediate position towards a final position (FIG. 7), when the tension of the rope 26 exceeds the adjustment threshold of the device. 10.
  • the first and second braking surfaces 28, 38 then extend parallel to one another to constitute the second locking position, which intervenes during a fall of the user.
  • the adjustment threshold between the two blocking positions of the second pulley 14 depends on the return force of a torsion spring 42, shown in dotted lines in FIG. 5.
  • the spring 42 is mounted coaxially on the axis 32, in being integrated under the pulley 14 in a circular housing formed in the support plate 30.
  • One of the end strands of the spring 42 is hooked to the second pulley 14, and the other strand to the base flange 18.
  • the prestressing of the spring 42 causes the return of the support plate 30 and pulley 14 assembly to a rest position shown in FIG. 1. This position is suitable for the establishment of the rope 26, which is wound according to an S in the two grooves 24,34 of the pulleys 12,14 with an intermediate passage between the two surfaces 28,40.
  • the second flange 20 (FIG. 1) is used to close the transverse gap 16 after the cord 26 has been put in place.
  • the upper part of the flange 20 is mounted with limited tilting on a pivot of the fixing member 22 of the first pulley. 12.
  • the position of maximum separation of the second flange 20 (FIG. 1) allows the cord 26 to be wound around the two pulleys 14,12.
  • the two flanges 18,20 are located opposite one another, preventing any escape of the cord 26 outside the interval 16.
  • the middle area of the second flange 20 comprises a slot 44 in the form of a semi-open U, intended to cooperate in the closed position with a stop 46 for limiting the tilting stroke of the flange 20.
  • the stop 46 is arranged in the extension of the axis 32 of the second pulley 14.
  • the lower part of the base flange 18 has a first opening 48 to which a fastening carabiner (not shown) can be hung.
  • the second flange 20 has a second opening 50 conjugate intended to come into alignment in the closed position with the first opening 48, to allow the introduction of the carabiner by means of a hinged pawl 52.
  • the base flange 18 Opposite the opening 48, the base flange 18 includes an orifice 54 for the passage of an auxiliary cord (not shown).
  • the straight edge is fitted with a square rib 56, arranged to prevent the cord 26 from being wound upside down on the pulleys 14, 12.
  • a control handle 58 is associated with the support plate 30 for pivoting by manual action the second pulley 14 around the axis 32, from one of the two locking positions (fig. 6 or 7) towards the release position (fig. 5).
  • the control handle 58 is advantageously articulated on the plate 30 at a point 60 located opposite the rib 56, and cooperates with a return spring 62 which biases the handle 58 towards a raised position of rest (in solid lines on fig. 1).
  • the working position of the handle 58 is illustrated in dotted lines in FIGS. 1 and 5, and is obtained by lowering the handle 58 anticlockwise, and against the restoring force. of the spring 62.
  • the release of the handle 58 causes it to return automatically to the raised position of rest.
  • the control handle 58 could be fixed without articulation to the support plate 30.
  • the user first installs the rope 26 on the pulleys 14,12, after prior tilting to the left of the second flange 20 to the separated position ( Figure 1).
  • the rope 26 is first wound in the groove 34 of the second pulley 14, then passes into the intermediate space arranged between the first and the third surfaces 28, 40, and is finally wound in the groove 24 for guiding the first pulley 12 fixed.
  • the rib 56 prevents a bad winding of the cord 26.
  • the reclosing of the second flange 20 traps the cord 26 in the transverse interval 16 of the device 10.
  • the positioning of the snap hook in the two openings 48.50 keeps the two flanges 18.20 facing each other, preventing any accidental escape of the rope 26.
  • the attachment carabiner is connected to the user's harness by a connecting strap and the upstream strand of the rope 26 is fixed to an upper anchor point.
  • the user positions the control handle 58 in the working position, and rotates it to the lowered position corresponding to the unlocking position of the second pulley 14 (see figure 5).
  • the space between the first and third surfaces 28.40 is sufficient not to block the rope 26.
  • the descent speed depends on the friction of the rope 26 in the grooves 34.24 and can be adjusted by the handle 58.
  • the tension F1 of the rope 26 causes the pivoting in a clockwise direction of the support plate 30 and pulley 14 assembly to the intermediate position, in which the boss 36 wedges the rope 26 against the first braking surface 28.
  • the device 10 is then in the first locking position causing the descent movement to stop.
  • the tension F1 of the cord 26 is lower than the adjustment threshold of the device 10.
  • the second pulley 14 remains immobilized in this intermediate position, as long as the control handle 58 is not actuated.
  • the second braking surface 38 takes over from the boss 36, to define a greater range during the second locking position. The jamming effect is greater in this second locking position, but the cord 26 is not damaged due to the planar shape of the two surfaces 28, 38.
  • the safety device 10 is particularly suitable for climbing, both in descenders and in ascenders for insurance by the second or solo.
  • the adjustment is made by adjusting the preload of the torsion spring 42 in the rest position.
  • One of the strands of the spring 42 can be connected to an adjustment device, in particular with a rotary button accessible from the opposite face of the base flange 18. When the adjustment is made, the rotary button is locked. This setting allows you to precisely adjust the threshold in a range between 100 and 500 daN.
  • the threshold can also be adjusted by varying the relative position of the second pulley 14 relative to the first pulley 12.
  • the first pulley 12 is replaced by a simple fixed stud.
  • the rope 26 is no longer wound according to an S, but takes the form of a U-shaped half-loop.

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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)

Abstract

A self arresting rope safety device (10) comprises two pulleys (12, 14), one of which (12) is fixed on a base plate (18) and the other (14) on a support plate (30) which is capable of pivoting on an axis of articulation (32). The pulley (12) is equipped with a first braking surface (28), against which the rope (26) is pressed by a boss (36) of the pulley (14) when the support plate (30) is driven by the tension of the rope (26) towards a first locking position. The pulley (14) is equipped with the second braking surface (38) interacting with the first surface (28) following the pivoting movement followed by the support plate (30) towards a second locking position. The passage between the two locking positions arises after the tension in the rope (26) exceeds a predetermined threshold. <IMAGE>

Description

L'invention est relative à un dispositif d'assurance autobloquant pour corde, comprenant :
- un premier flasque de base équipé d'une première poulie ou plot fixe, laquelle est décalée par rapport à un axe d'articulation s'étendant perpendiculairement au premier flasque,
- une deuxième poulie solidaire d'une plaque support montée à pivotement limité autour de l'axe dans un plan parallèle au flasque de base,
- une poignée de commande associée à la plaque support pour assurer le déblocage manuel de la corde,
- un deuxième flasque escamotable agencé pour autoriser l'enroulement et le passage de la corde entre les première et deuxième poulies,
- une première surface de freinage agencée sur la première poulie, contre laquelle est pressée la corde par un bossage de la deuxième poulie lorsque la plaque support est entraînée par la tension de la corde vers une première position de blocage,
- et un ressort de rappel sollicitant la plaque support dans le sens du déblocage vers une position de repos.The invention relates to a self-locking insurance device for a rope, comprising:
a first base flange equipped with a first pulley or fixed stud, which is offset with respect to a hinge axis extending perpendicular to the first flange,
a second pulley secured to a support plate mounted with limited pivoting around the axis in a plane parallel to the base flange,
- a control handle associated with the support plate to ensure manual release of the rope,
- a second retractable flange arranged to authorize the winding and the passage of the rope between the first and second pulleys,
a first braking surface arranged on the first pulley, against which the rope is pressed by a boss of the second pulley when the support plate is driven by the tension of the rope towards a first locking position,
- And a return spring urging the support plate in the unlocking direction towards a rest position.

Un tel dispositif est connu du document FR 2451 752 correspondant au descendeur STOP commercialisé par la demanderesse. La réaction de la corde sollicite la deuxième poulie vers une seule position de blocage, dans laquelle le bossage coince la corde contre la première surface de freinage. Une butée de limitation de la course de pivotement est agencée sur la plaque support pour stopper la deuxième poulie dans cette position. L'effet de coincement par le bossage peut néanmoins endommager la corde lors de chocs importants suite à des chutes répétées.Such a device is known from document FR 2451 752 corresponding to the STOP descender marketed by the applicant. The reaction of the rope urges the second pulley towards a single locking position, in which the boss wedges the rope against the first braking surface. A stop for limiting the pivoting stroke is arranged on the support plate to stop the second pulley in this position. The effect of jamming by the boss can nevertheless damage the rope during heavy shocks following repeated falls.

L'objet de l'invention consiste à réaliser un dispositif d'assurance utilisable en descendeur ou en bloqueur, évitant toute usure prématurée de la corde.The object of the invention is to provide an insurance device which can be used as a descender or a blocker, preventing any premature wear of the rope.

Le dispositif d'assurance selon l'invention est caractérisé en ce que la deuxième poulie est conformée en came ayant une deuxième surface de freinage destinée à coopérer avec la première surface de freinage, suite au mouvement de pivotement poursuivi de la plaque support vers une deuxième position de blocage, le passage de la première position de blocage vers la deuxième position de blocage s'effectuant lorsque la tension de la corde dépasse un seuil prédéterminé.The insurance device according to the invention is characterized in that the second pulley is shaped as a cam having a second braking surface intended to cooperate with the first braking surface, following the continued pivoting movement of the support plate towards a second locking position, the passage from the first locking position to the second locking position taking place when the tension of the rope exceeds a predetermined threshold.

La deuxième surface de freinage prend alors le relais du bossage pour que l'effet de coincement de la corde contre la première surface de freinage soit plus important dans la deuxième position de blocage, que dans la première.The second braking surface then takes over from the boss so that the effect of the rope jamming against the first braking surface is greater in the second locking position than in the first.

Le seuil de passage de la première position de blocage vers la seconde position de blocage dépend de la dureté du ressort de rappel de la plaque support.The threshold for passing from the first locking position to the second locking position depends on the hardness of the return spring of the support plate.

Les première et deuxième surfaces de freinage s'étendent sensiblement parallèlement l'une à l'autre dans la deuxième position de blocage de la corde. Le coincement de la corde sur une grande portée évite son usure lors de chocs importants.The first and second braking surfaces extend substantially parallel to each other in the second rope locking position. The jamming of the rope over a long span prevents it from being worn during heavy shocks.

Le seuil de passage entre les deux positions de blocage peut être avantageusement ajusté au moyen d'un dispositif de réglage de la précontrainte du ressort de rappel de la plaque support.The passage threshold between the two blocking positions can advantageously be adjusted by means of a device for adjusting the preload of the return spring of the support plate.

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode de réalisation de l'invention, donné à titre d'exemple non limitatif, et représenté aux dessins annexés, dans lesquels :

  • - la figure 1 montre une vue en élévation du dispositif d'assurance selon l'invention, le deuxième flasque étant en position écartée, et la poignée de commande en position de repos (traits pleins), et en position de travail (traits pointillés) ;
  • - la figure 2 est une vue identique à la figure 1, en position fermée du deuxième flasque ;
  • - la figure 3 est une vue de droite de la figure 2 ;
  • - la figure 4 est une vue de gauche de la figure 2 ;
  • - la figure 5 montre le dispositif d'assurance en position de déblocage lors d'un usage normal, le deuxième flasque n'étant pas représenté.
  • - les figures 6 et 7 sont des vues identiques de la figure 5, respectivement dans les première et deuxième positions de blocage.
Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment of the invention, given by way of nonlimiting example, and represented in the appended drawings, in which:
  • - Figure 1 shows an elevational view of the insurance device according to the invention, the second flange being in the separated position, and the control handle in the rest position (solid lines), and in the working position (dotted lines) ;
  • - Figure 2 is a view identical to Figure 1, in the closed position of the second flange;
  • - Figure 3 is a right view of Figure 2;
  • - Figure 4 is a left view of Figure 2;
  • - Figure 5 shows the insurance device in the unlocked position during normal use, the second flange not being shown.
  • - Figures 6 and 7 are identical views of Figure 5, respectively in the first and second locking positions.

Sur les figures, un appareil de sécurité 10 pour corde, comporte une paire de poulies 12,14, logées dans un intervalle 16 transversal ménagé entre deux flasques 18,20 parallèles. La première poulie 12 est montée fixe au moyen d'un organe de fixation 22 sur le premier flasque de base 18, en étant immobilisée en rotation. La première poulie 12 est équipée d'un secteur supérieur circulaire ayant une gorge 24 de guidage de la corde 26, et d'une première surface 28 de freinage, située en regard de la deuxième poulie 14. La première surface 28 de freinage est sensiblement rectiligne, en s'étendant perpendiculairement au flasque de base 18.In the figures, a safety device 10 for rope, comprises a pair of pulleys 12,14, housed in a transverse gap 16 formed between two parallel flanges 18,20. The first pulley 12 is mounted fixed by means of a fixing member 22 on the first base flange 18, while being immobilized in rotation. The first pulley 12 is equipped with a circular upper sector having a groove 24 for guiding the rope 26, and with a first braking surface 28, located opposite the second pulley 14. The first braking surface 28 is substantially straight, extending perpendicular to the base flange 18.

La deuxième poulie 14 est solidarisée à une plaque de support 30 mobile, susceptible de pivoter autour d'un axe 32 faisant saillie du flasque 18. La plaque de support 30 est séparée du flasque de base 18 par un faible jeu axial, autorisant un mouvement limité de pivotement de la plaque 30, dans un plan de débattement parallèle au flasque 18.The second pulley 14 is secured to a movable support plate 30, capable of pivoting about an axis 32 projecting from the flange 18. The support plate 30 is separated from the base flange 18 by a small axial clearance, allowing movement limited pivoting of the plate 30, in a deflection plane parallel to the flange 18.

La deuxième poulie 14 est conformée en came, laquelle est excentrée par rapport à l'axe de pivotement 32. La poulie 14 comporte un secteur inférieur circulaire ayant une gorge 34 d'enroulement de la corde 26, ladite gorge 34 étant centrée sur un axe fictif, légèrement décalé par rapport à l'axe 32 de pivotement. A l'opposé de la gorge 34, se trouve un bossage 36 destiné à coincer la corde 26 contre la première surface de freinage 28, lorsque la plaque support 30 se trouve dans une position intermédiaire correspondant à une première position de blocage (fig.6).The second pulley 14 is shaped as a cam, which is eccentric relative to the pivot axis 32. The pulley 14 has a circular lower sector having a groove 34 for winding the cord 26, said groove 34 being centered on an axis fictitious, slightly offset from the pivot axis 32. Opposite the groove 34, there is a boss 36 intended to wedge the rope 26 against the first braking surface 28, when the support plate 30 is in an intermediate position corresponding to a first locking position (fig.6 ).

Entre le bossage 36 et la gorge 34 circulaire de la deuxième poulie 14, s'étendent une deuxième surface 38 de freinage, et une troisième surface 40 de guidage de la corde 26. La deuxième surface 38 est sensiblement rectiligne, et se trouve plus éloignée de l'axe 32 que la troisième surface 40.Between the boss 36 and the circular groove 34 of the second pulley 14, extend a second braking surface 38, and a third surface 40 for guiding the rope 26. The second surface 38 is substantially rectilinear, and is more distant of the axis 32 as the third surface 40.

Le positionnement de l'axe 32 de la deuxième poulie 14 est tel que le bossage 36 ne vient jamais en engagement contre la première surface 28 de freinage de la poulie 12. Dans la position intermédiaire de la figure 6, l'espace de passage de la corde 26 entre la première surface 28 et le bossage 36 est minimum, de manière à assurer un premier blocage lorsque la valeur de la tension exercée sur la corde 26 est inférieure à un seuil prédéterminé.The positioning of the axis 32 of the second pulley 14 is such that the boss 36 never comes into engagement against the first braking surface 28 of the pulley 12. In the intermediate position of FIG. 6, the passage space of the cord 26 between the first surface 28 and the boss 36 is minimum, so as to ensure a first blocking when the value of the tension exerted on the cord 26 is less than a predetermined threshold.

L'ensemble plaque de support 30 et poulie 14 est susceptible de continuer le mouvement de pivotement au-delà de la position intermédiaire vers une position finale (figure 7), lorsque la tension de la corde 26 dépasse le seuil de réglage de l'appareil 10. Les première et deuxième surfaces 28,38 de freinage s'étendent alors parallèlement l'une à l'autre pour constituer la deuxième position de blocage, laquelle intervient lors d'une chute de l'utilisateur.The support plate 30 and pulley 14 assembly is capable of continuing the pivoting movement beyond the intermediate position towards a final position (FIG. 7), when the tension of the rope 26 exceeds the adjustment threshold of the device. 10. The first and second braking surfaces 28, 38 then extend parallel to one another to constitute the second locking position, which intervenes during a fall of the user.

Le seuil de réglage entre les deux positions de blocage de la deuxième poulie 14 dépend de la force de rappel d'un ressort de torsion 42, montré en pointillé sur la figure 5. Le ressort 42 est monté coaxialement sur l'axe 32, en étant intégré sous la poulie 14 dans un logement circulaire ménagé dans la plaque support 30. L'un des brins d'extrémité du ressort 42 est accroché à la deuxième poulie 14, et l'autre brin au flasque de base 18. En absence de tension sur la corde 26, la précontrainte du ressort 42 provoque le retour de l'ensemble plaque support 30 et poulie 14 vers une position de repos représentée à la figure 1. Cette position est adaptée pour la mise en place de la corde 26, laquelle est enroulée selon un S dans les deux gorges 24,34 des poulies 12,14 avec un passage intermédiaire entre les deux surfaces 28,40.The adjustment threshold between the two blocking positions of the second pulley 14 depends on the return force of a torsion spring 42, shown in dotted lines in FIG. 5. The spring 42 is mounted coaxially on the axis 32, in being integrated under the pulley 14 in a circular housing formed in the support plate 30. One of the end strands of the spring 42 is hooked to the second pulley 14, and the other strand to the base flange 18. In the absence of tension on the rope 26, the prestressing of the spring 42 causes the return of the support plate 30 and pulley 14 assembly to a rest position shown in FIG. 1. This position is suitable for the establishment of the rope 26, which is wound according to an S in the two grooves 24,34 of the pulleys 12,14 with an intermediate passage between the two surfaces 28,40.

Le deuxième flasque 20 (figure 1) sert à obturer l'intervalle 16 transversal après mise en place de la corde 26. La partie supérieure du flasque 20 est montée à basculement limité sur un pivot de l'organe de fixation 22 de la première poulie 12.The second flange 20 (FIG. 1) is used to close the transverse gap 16 after the cord 26 has been put in place. The upper part of the flange 20 is mounted with limited tilting on a pivot of the fixing member 22 of the first pulley. 12.

La position d'écartement maximum du deuxième flasque 20 (figure 1) permet l'enroulement de la corde 26 autour des deux poulies 14,12. Dans la position fermée, représentée à la figure 2, les deux flasques 18,20 sont situés en regard l'un de l'autre, en empêchant tout échappement de la corde 26 hors de l'intervalle 16. La zone médiane du deuxième flasque 20 comporte une fente 44 en forme de U semi-ouvert, destinée à coopérer en position fermée avec une butée 46 de limitation de la course de basculement du flasque 20. La butée 46 est disposée dans le prolongement de l'axe 32 de la deuxième poulie 14.The position of maximum separation of the second flange 20 (FIG. 1) allows the cord 26 to be wound around the two pulleys 14,12. In the closed position, shown in Figure 2, the two flanges 18,20 are located opposite one another, preventing any escape of the cord 26 outside the interval 16. The middle area of the second flange 20 comprises a slot 44 in the form of a semi-open U, intended to cooperate in the closed position with a stop 46 for limiting the tilting stroke of the flange 20. The stop 46 is arranged in the extension of the axis 32 of the second pulley 14.

La partie inférieure du flasque de base 18 est dotée d'une première ouverture 48 à laquelle peut être accroché un mousqueton d'attache (non représenté). Le deuxième flasque 20 comporte une deuxième ouverture 50 conjuguée destinée à venir en alignement en position fermée avec la première ouverture 48, pour autoriser l'introduction du mousqueton par l'intermédiaire d'un cliquet 52 articulé.The lower part of the base flange 18 has a first opening 48 to which a fastening carabiner (not shown) can be hung. The second flange 20 has a second opening 50 conjugate intended to come into alignment in the closed position with the first opening 48, to allow the introduction of the carabiner by means of a hinged pawl 52.

A l'opposé de l'ouverture 48, le flasque de base 18 comprend un orifice 54 pour le passage d'une cordelette auxiliaire (non représentée).Opposite the opening 48, the base flange 18 includes an orifice 54 for the passage of an auxiliary cord (not shown).

Dans la zone médiane du flasque de base 18, le bord droit est équipé d'une nervure 56 en équerre, agencée pour empêcher un enroulement à l'envers de la corde 26 sur les poulies 14,12.In the central zone of the base flange 18, the straight edge is fitted with a square rib 56, arranged to prevent the cord 26 from being wound upside down on the pulleys 14, 12.

Une poignée de commande 58 est associée à la plaque support 30 pour faire pivoter par une action manuelle la deuxième poulie 14 autour de l'axe 32, à partir de l'une des deux positions de blocage (fig.6 ou 7) vers la position de déblocage (fig.5). La poignée de commande 58 est avantageusement articulée sur la plaque 30 en un point 60 situé à l'opposé de la nervure 56, et coopère avec un ressort de rappel 62 qui sollicite la poignée 58 vers une position relevée de repos (en traits pleins sur la fig.1). La position de travail de la poignée 58 est illustrée en pointillé sur les figures 1 et 5, et est obtenue par un abaissement de la poignée 58 dans le sens inverse des aiguilles d'une montre, et à l'encontre de la force de rappel du ressort 62. Le relâchement de la poignée 58 provoque son retour automatique vers la position relevée de repos.A control handle 58 is associated with the support plate 30 for pivoting by manual action the second pulley 14 around the axis 32, from one of the two locking positions (fig. 6 or 7) towards the release position (fig. 5). The control handle 58 is advantageously articulated on the plate 30 at a point 60 located opposite the rib 56, and cooperates with a return spring 62 which biases the handle 58 towards a raised position of rest (in solid lines on fig. 1). The working position of the handle 58 is illustrated in dotted lines in FIGS. 1 and 5, and is obtained by lowering the handle 58 anticlockwise, and against the restoring force. of the spring 62. The release of the handle 58 causes it to return automatically to the raised position of rest.

La poignée de commande 58 pourrait être fixée sans articulation à la plaque support 30.The control handle 58 could be fixed without articulation to the support plate 30.

Le fonctionnement de l'appareil de sécurité 10 est décrit par la suite pour une utilisation en descendeur :The operation of the safety device 10 is described below for use in descenders:

L'utilisateur installe d'abord la corde 26 sur les poulies 14,12, après basculement préalable vers la gauche du deuxième flasque 20 vers la position écartée (figure 1). La corde 26 est d'abord enroulée dans la gorge 34 de la deuxième poulie 14, passe ensuite dans l'espace intermédiaire agencé entre la première et la troisième surfaces 28,40, et est finalement enroulée dans la gorge 24 de guidage de la première poulie 12 fixe. La nervure 56 évite un mauvais enroulement de la corde 26. La refermeture du deuxième flasque 20 emprisonne la corde 26 dans l'intervalle 16 transversal de l'appareil 10. La mise en place du mousqueton d'attache dans les deux ouvertures 48,50 maintient les deux flasques 18,20 en face de l'autre, en empêchant tout échappement accidentel de la corde 26.The user first installs the rope 26 on the pulleys 14,12, after prior tilting to the left of the second flange 20 to the separated position (Figure 1). The rope 26 is first wound in the groove 34 of the second pulley 14, then passes into the intermediate space arranged between the first and the third surfaces 28, 40, and is finally wound in the groove 24 for guiding the first pulley 12 fixed. The rib 56 prevents a bad winding of the cord 26. The reclosing of the second flange 20 traps the cord 26 in the transverse interval 16 of the device 10. The positioning of the snap hook in the two openings 48.50 keeps the two flanges 18.20 facing each other, preventing any accidental escape of the rope 26.

Le mousqueton d'attache est relié au baudrier de l'utilisateur par une sangle de liaison et le brin amont de la corde 26 est fixé à un point d'ancrage supérieur.The attachment carabiner is connected to the user's harness by a connecting strap and the upstream strand of the rope 26 is fixed to an upper anchor point.

Au cours de la descente le long de la corde 26, l'utilisateur positionne la poignée de commande 58 dans la position de travail, et la fait pivoter jusqu'à la position abaissée correspondant à la position de déblocage de la deuxième poulie 14 (voir figure 5). L'espace entre les première et troisième surfaces 28,40 est suffisant pour ne pas bloquer la corde 26. La vitesse de descente dépend de la friction de la corde 26 dans les gorges 34,24 et peut être réglée par la poignée 58.During the descent along the rope 26, the user positions the control handle 58 in the working position, and rotates it to the lowered position corresponding to the unlocking position of the second pulley 14 (see figure 5). The space between the first and third surfaces 28.40 is sufficient not to block the rope 26. The descent speed depends on the friction of the rope 26 in the grooves 34.24 and can be adjusted by the handle 58.

En cas de relâchement volontaire de la poignée 58 lors d'une descente normale, c'est-à-dire sans chute, la tension F1 de la corde 26 (voir figure 6) provoque le pivotement dans le sens des aiguilles d'une montre de l'ensemble plaque support 30 et poulie 14 jusqu'à la position intermédiaire, dans laquelle le bossage 36 coince la corde 26 contre la première surface 28 de freinage. L'appareil 10 se trouve alors dans la première position de blocage provoquant l'arrêt du mouvement de descente. La tension F1 de la corde 26 est inférieure au seuil de réglage de l'appareil 10. La deuxième poulie 14 reste immobilisée dans cette position intermédiaire, aussi longtemps que la poignée de commande 58 n'est pas actionnée.In the event of voluntary release of the handle 58 during a normal descent, that is to say without falling, the tension F1 of the rope 26 (see FIG. 6) causes the pivoting in a clockwise direction of the support plate 30 and pulley 14 assembly to the intermediate position, in which the boss 36 wedges the rope 26 against the first braking surface 28. The device 10 is then in the first locking position causing the descent movement to stop. The tension F1 of the cord 26 is lower than the adjustment threshold of the device 10. The second pulley 14 remains immobilized in this intermediate position, as long as the control handle 58 is not actuated.

Pour repartir, il suffit de mettre la poignée 58 dans la position de travail, et de l'amener vers la position abaissée (fig.5).To start again, simply put the handle 58 in the working position, and bring it to the lowered position (fig.5).

En cas de relâchement accidentel de la poignée 58 suite à une chute, la tension F2 de la corde 26 entraîne en pivotement la deuxième poulie 14 vers la position finale, dans laquelle le coincement de la corde 26 intervient entre les première et deuxième surfaces 28,38 de freinage (figure 7). L'appareil 10 se trouve dans la deuxième position de blocage, étant donné que la tension F2 de la corde 26 est supérieure au dit seuil de réglage. On remarque que l'intensité de blocage de la corde 26 dans l'appareil 10 dépend de la valeur de la tension exercée sur l'ensemble plaque support 30 et poulie 14. Lorsque le seuil de réglage de l'appareil 10 n'est pas dépassé (cas de la tension F1), la petite portée du bossage 36 est suffisante pour définir la première position de blocage. En cas de dépassement du seuil par la tension F2 de la corde 26, la deuxième surface 38 de freinage prend le relais du bossage 36, pour définir une portée plus importante lors de la deuxième position de blocage. L'effet de coincement est plus important dans cette deuxième position de blocage, mais la corde 26 n'est pas endommagée grâce à la forme plane des deux surfaces 28,38.In the event of accidental release of the handle 58 following a fall, the tension F2 of the rope 26 pivots the second pulley 14 towards the final position, in which the jamming of the rope 26 occurs between the first and second surfaces 28, 38 braking (Figure 7). The apparatus 10 is in the second locking position, since the tension F2 of the cord 26 is greater than said adjustment threshold. Note that the blocking intensity of the rope 26 in the apparatus 10 depends on the value of the tension exerted on the support plate 30 and pulley 14 assembly. When the adjustment threshold of the apparatus 10 is not exceeded (case of voltage F1), the small range of the boss 36 is sufficient to define the first locking position. If the threshold is exceeded by the tension F2 of the cord 26, the second braking surface 38 takes over from the boss 36, to define a greater range during the second locking position. The jamming effect is greater in this second locking position, but the cord 26 is not damaged due to the planar shape of the two surfaces 28, 38.

L'appareil de sécurité 10 est particulièrement adapté à l'escalade, aussi bien en descendeur, qu'en bloqueur pour l'assurance par le second ou en solo.The safety device 10 is particularly suitable for climbing, both in descenders and in ascenders for insurance by the second or solo.

On remarque sur la figure 1 que le sens de basculement du deuxième flasque 20 vers la position écartée, s'effectue vers la gauche. Il en résulte un renforcement de la tenue mécanique de l'appareil 10 en cas de chocs. Le positionnement de la fente 44 engagée sur la butée 46 de l'axe 32 (fig.2) empêche toute ouverture intempestive des flasques 18,20 suite à un choc.It can be seen in FIG. 1 that the direction of tilting of the second flange 20 towards the separated position takes place to the left. This results in a strengthening of the mechanical strength of the device 10 in the event of impacts. The positioning of the slot 44 engaged on the stop 46 of the axis 32 (fig.2) prevents any unwanted opening of the flanges 18,20 following an impact.

Il est possible d'ajuster le seuil de passage de la première position de blocage vers la seconde position de blocage, en fonction du poids de l'utilisateur. L'ajustage s'opère en réglant la précontrainte du ressort de torsion 42 dans la position de repos. L'un des brins du ressort 42 peut être relié à un dispositif de réglage, notamment à bouton rotatif accessible depuis la face opposée du flasque de base 18. Lorsque le réglage est réalisé, le bouton rotatif est verrouillé. Ce réglage permet d'ajuster avec précision le seuil dans une fourchette située entre 100 et 500 daN.It is possible to adjust the passage threshold from the first locking position to the second locking position, depending on the weight of the user. The adjustment is made by adjusting the preload of the torsion spring 42 in the rest position. One of the strands of the spring 42 can be connected to an adjustment device, in particular with a rotary button accessible from the opposite face of the base flange 18. When the adjustment is made, the rotary button is locked. This setting allows you to precisely adjust the threshold in a range between 100 and 500 daN.

Le seuil peut encore être ajusté en faisant varier la position relative de la deuxième poulie 14 par rapport à la première poulie 12.The threshold can also be adjusted by varying the relative position of the second pulley 14 relative to the first pulley 12.

Selon une variante (non représentée), la première poulie 12 est remplacée par un simple plot fixe. La corde 26 n'est plus enroulée selon un S, mais prend la forme d'une demi-boucle en U.According to a variant (not shown), the first pulley 12 is replaced by a simple fixed stud. The rope 26 is no longer wound according to an S, but takes the form of a U-shaped half-loop.

Claims (9)

1. Dispositif d'assurance autobloquant pour corde, comprenant :
- un premier flasque 18 de base équipé d'une première poulie 12 ou plot fixe, laquelle est décalée par rapport à un axe 32 d'articulation s'étendant perpendiculairement au premier flasque 18,
- une deuxième poulie 14 solidaire d'une plaque support 30 montée à pivotement limité autour de l'axe 32 dans un plan sensiblement parallèle au flasque de base 18,
- une poignée de commande 58 associée à la plaque support 30 pour assurer le déblocage manuel de la corde 26,
- un deuxième flasque 20 escamotable agencé pour autoriser l'enroulement et le passage de la corde 26 entre les première et deuxième poulies 12,14,
- une première surface 28 de freinage agencée sur la première poulie 12, contre laquelle est pressée la corde 26 par un bossage 36 de la deuxième poulie 14 lorsque la plaque support 30 est entraînée par la tension de la corde vers une première position de blocage,
- et un ressort 42 de rappel sollicitant la plaque support 30 dans le sens du déblocage vers une position de repos, caractérisé en ce que la deuxième poulie 14 est conformée en came ayant une deuxième surface 38 de freinage destinée à coopérer avec la première surface 28 de freinage, suite au mouvement de pivotement poursuivi de la plaque support 30 vers une deuxième position de blocage, le passage de la première position de blocage vers la deuxième position de blocage s'effectuant lorsque la tension de la corde 26 dépasse un seuil prédéterminé.1. Self-locking rope insurance device, comprising:
a first base flange 18 fitted with a first pulley 12 or fixed stud, which is offset with respect to an axis 32 of articulation extending perpendicular to the first flange 18,
a second pulley 14 secured to a support plate 30 mounted with limited pivoting around the axis 32 in a plane substantially parallel to the base flange 18,
a control handle 58 associated with the support plate 30 to ensure manual release of the rope 26,
a second retractable flange 20 arranged to authorize the winding and the passage of the rope 26 between the first and second pulleys 12, 14,
a first braking surface 28 arranged on the first pulley 12, against which the rope 26 is pressed by a boss 36 of the second pulley 14 when the support plate 30 is driven by the tension of the rope towards a first locking position,
- And a return spring 42 urging the support plate 30 in the unlocking direction towards a rest position, characterized in that the second pulley 14 is shaped as a cam having a second braking surface 38 intended to cooperate with the first surface 28 braking, following the continued pivoting movement of the support plate 30 towards a second locking position, the passage from the first locking position to the second locking position taking place when the tension of the rope 26 exceeds a predetermined threshold. 2. Dispositif d'assurance selon la revendication 1, caractérisé en ce que la deuxième surface 38 freinage possède une portée supérieure à celle du bossage 36, pour que l'effet de coincement de la corde 26 contre la première surface 28 de freinage soit plus important dans la deuxième position de blocage que dans la première.2. Insurance device according to claim 1, characterized in that the second braking surface 38 has a greater reach than that of the boss 36, so that the effect of jamming of the rope 26 against the first braking surface 28 is more important in the second locking position than in the first. 3. Dispositif d'assurance selon la revendication 1 ou 2, caractérisé en ce que le seuil de passage de la première position de blocage vers la seconde position de blocage dépend de la dureté du ressort 42 de rappel de la plaque support 30.3. Insurance device according to claim 1 or 2, characterized in that the threshold for passing from the first blocking position to the second blocking position depends on the hardness of the return spring 42 of the support plate 30. 4. Dispositif d'assurance selon l'une des revendications 1 à 3, caractérisé en ce que les première et deuxième surfaces 28,38 de freinage s'étendent sensiblement parallèlement l'une à l'autre dans la deuxième position du blocage de la corde 26.4. Insurance device according to one of claims 1 to 3, characterized in that the first and second braking surfaces 28, 38 extend substantially parallel to one another in the second position of the blocking of the rope 26. 5. Dispositif d'assurance selon l'une des revendications 1 à 4, caractérisé en ce que la deuxième poulie 14 est excentrée par rapport à l'axe 32 d'articulation.5. Insurance device according to one of claims 1 to 4, characterized in that the second pulley 14 is eccentric relative to the axis 32 of articulation. 6. Dispositif d'assurance selon l'une des revendications 1 à 5, caractérisé en ce que le deuxième flasque 20 est monté à basculement entre une position fermée et une position écartée sur un pivot de l'organe de fixation 22 de la première poulie 12, et comporte une fente 44 en forme de U semi-ouvert destinée à coopérer en position fermée avec une butée 46 de limitation de la course de basculement, ladite butée 46 étant disposée dans le prolongement de l'axe 32 d'articulation.6. Insurance device according to one of claims 1 to 5, characterized in that the second flange 20 is pivotally mounted between a closed position and a spaced position on a pivot of the fixing member 22 of the first pulley 12, and has a semi-open U-shaped slot 44 intended to cooperate in the closed position with a stop 46 for limiting the tilting stroke, said stop 46 being arranged in the extension of the axis 32 of articulation. 7. Dispositif d'assurance selon l'une des revendications 1 à 6, caractérisé en ce que la poignée 58 de commande de déblocage est articulée en un point 60 de la plaque support 30, ledit point 60 d'articulation étant situé au voisinage de la gorge 34 de guidage de la deuxième poulie 14.7. Insurance device according to one of claims 1 to 6, characterized in that the handle 58 for unlocking control is articulated at a point 60 of the support plate 30, said point 60 of articulation being located in the vicinity of the groove 34 for guiding the second pulley 14. 8. Dispositif d'assurance selon la revendication 7, caractérisé en ce que l'un des bords du flasque de base 18 comporte une nervure 56 en équerre, située à l'opposé du point 60 d'articulation de la poignée de commande 58, ladite nervure étant agencée pour empêcher un enroulement à l'envers de la corde 26 sur les poulies 12,14.8. Insurance device according to claim 7, characterized in that one of the edges of the base flange 18 comprises a rib 56 at right angles, located opposite the point 60 of articulation of the control handle 58, said rib being arranged to prevent winding upside down of the rope 26 on the pulleys 12,14. 9. Dispositif d'assurance selon l'une des revendications 1 à 8, caractérisé en ce que le flasque de base 18 comporte un dispositif de réglage de la précontrainte du ressort 42 de rappel de la plaque support 30 pour l'ajustage dudit seuil.9. Insurance device according to one of claims 1 to 8, characterized in that the base flange 18 comprises a device for adjusting the preload of the spring 42 for returning the support plate 30 for the adjustment of said threshold.
EP90420215A 1989-05-19 1990-05-03 Self arresting rope safety device Expired - Lifetime EP0398819B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8906692 1989-05-19
FR8906692A FR2647099B1 (en) 1989-05-19 1989-05-19 SELF-LOCKING INSURANCE DEVICE FOR ROPE

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EP0398819A1 true EP0398819A1 (en) 1990-11-22
EP0398819B1 EP0398819B1 (en) 1993-07-28

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JP (1) JP2846057B2 (en)
AU (1) AU623523B2 (en)
DE (1) DE69002387T2 (en)
ES (1) ES2044509T3 (en)
FR (1) FR2647099B1 (en)

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Cited By (29)

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Publication number Priority date Publication date Assignee Title
FR2696647A1 (en) * 1992-10-12 1994-04-15 Zedel Safety descender for rope.
EP0593369A1 (en) * 1992-10-12 1994-04-20 Zedel Security descending device for rope
US5360083A (en) * 1992-10-12 1994-11-01 Zedel Safety descender for a rope
EP0688581A1 (en) * 1994-06-23 1995-12-27 Zedel Disconnectable self-locking descending device
FR2721523A1 (en) * 1994-06-23 1995-12-29 Zedel Automatically locking descendeur for descending rope
FR2721522A1 (en) * 1994-06-23 1995-12-29 Zedel Self-locking descender with self-locking rope.
WO1996041658A3 (en) * 1995-06-08 1997-02-06 Joze Lorbek Jamming device for rope and alike
FR2741539A1 (en) * 1995-11-28 1997-05-30 Zedel Self locking rope brake for rock climbing
US5850893A (en) * 1995-11-28 1998-12-22 Zedel Self-locking descender for a rope with an operating lever
FR2763248A1 (en) * 1997-05-14 1998-11-20 Froment Sa Safety line locking mechanism, e.g. for workers operating on tall buildings
US6732833B2 (en) 1999-12-15 2004-05-11 Boris Rogelja Descender with two-way locking lever
US7845467B2 (en) 2006-03-15 2010-12-07 Zedel Multifunctional belaying device for a rope
EP1834672A1 (en) 2006-03-15 2007-09-19 Zedel Multifunctional belay device for rope
FR2898506A1 (en) 2006-03-15 2007-09-21 Zedel Soc Par Actions Simplifi MULTI-FUNCTIONAL ROPE INSURANCE APPARATUS
FR2904564A1 (en) * 2006-08-03 2008-02-08 Zedel Soc Par Actions Simplifi Rope belayer/descender apparatus for climber, has plate with control unit made active during belaying to unblock cam to spacing position if rope cooperates with pin, where unit has plate acting as braking modulator during descending stage
EP2301631A1 (en) 2009-09-25 2011-03-30 Zedel Self-locking rope safety device
US8584814B2 (en) 2009-09-25 2013-11-19 Zedel Self-arresting rope belay device
CN106794365A (en) * 2014-06-11 2017-05-31 塔兹公司 Device for suspending a load on a rope
WO2015189066A1 (en) * 2014-06-11 2015-12-17 Pascal Ollivier Apparatus for suspending a load on a rope
FR3022232A1 (en) * 2014-06-11 2015-12-18 Pascal Ollivier APPARATUS FOR SUSPENDING A LOAD TO A FILTER
CN106794365B (en) * 2014-06-11 2019-11-05 塔兹公司 Device for suspending a load on a rope
US10245452B2 (en) 2014-06-11 2019-04-02 Taz Apparatus for suspending a load on a rope
FR3039410A1 (en) * 2015-07-31 2017-02-03 Zedel ROPE INSURING DEVICE FOR USE IN INSURER AND MOULINETTE MODE
CN106390311A (en) * 2015-07-31 2017-02-15 齐德公司 Rope belay device usable for belaying mode and top-rope mode
EP3124081A3 (en) * 2015-07-31 2017-02-08 Zedel Belay device on rope for use in belay and toprope mode
EP3124081A2 (en) 2015-07-31 2017-02-01 Zedel Belay device on rope for use in belay and toprope mode
EP3263182A1 (en) 2016-07-01 2018-01-03 Pascal Gasteiger Device for securing a climbing rope
DE102021102673A1 (en) 2021-02-04 2022-08-04 Edelrid Gmbh & Co. Kg Portable lifeline device for belaying a partner when climbing
EP4212211A1 (en) * 2022-01-14 2023-07-19 Sherrill, Inc. Rope grab

Also Published As

Publication number Publication date
EP0398819B1 (en) 1993-07-28
FR2647099B1 (en) 1991-07-19
ES2044509T3 (en) 1994-01-01
JPH0394781A (en) 1991-04-19
DE69002387T2 (en) 1994-03-10
US5076400A (en) 1991-12-31
DE69002387D1 (en) 1993-09-02
FR2647099A1 (en) 1990-11-23
AU623523B2 (en) 1992-05-14
AU5577790A (en) 1990-11-22
JP2846057B2 (en) 1999-01-13

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