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EP0678310A1 - Fall arrest apparatus clamping automatically on a safety line - Google Patents

Fall arrest apparatus clamping automatically on a safety line Download PDF

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Publication number
EP0678310A1
EP0678310A1 EP95420104A EP95420104A EP0678310A1 EP 0678310 A1 EP0678310 A1 EP 0678310A1 EP 95420104 A EP95420104 A EP 95420104A EP 95420104 A EP95420104 A EP 95420104A EP 0678310 A1 EP0678310 A1 EP 0678310A1
Authority
EP
European Patent Office
Prior art keywords
lever
chute
cam
axis
cheeks
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
EP95420104A
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German (de)
French (fr)
Other versions
EP0678310B1 (en
Inventor
Jean Pejout
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Froment SA
Original Assignee
Froment SA
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Filing date
Publication date
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Publication of EP0678310A1 publication Critical patent/EP0678310A1/en
Application granted granted Critical
Publication of EP0678310B1 publication Critical patent/EP0678310B1/en
Anticipated expiration legal-status Critical
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Classifications

    • A—HUMAN NECESSITIES
    • A62—LIFE-SAVING; FIRE-FIGHTING
    • A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
    • A62B35/00—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion
    • A62B35/04—Safety belts or body harnesses; Similar equipment for limiting displacement of the human body, especially in case of sudden changes of motion incorporating energy absorbing means
    • 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 present invention relates to improvements made to fall arrest devices connected on the one hand to a harness worn by a user and on the other hand to a safety rope with respect to which the device locks automatically in the event of a fall of the user.
  • fall arrest devices are well known and used in particular by construction workers. When the worker is moving, the fall arrest device slides freely with respect to the rope, which is generally oriented vertically and by which it is secured against falls.
  • the devices in question include means for disconnecting from the safety rope when the user leaves the site.
  • Such devices are generally known comprising a rigid gutter of U-shaped cross section, one of the cheeks of which is pivotally associated with one of the branches of a bent axis, the other branch of which crosses a lever in two elements. articulated to each other by means of a hollow axis.
  • the bent axis is free of notches formed in the extreme part of the cheeks of the chute and that it is rotated, it is possible to engage the chute of the device around a safety rope. Once this operation has been carried out, it is necessary to pivot the bent axis again so as to bring the articulated lever opposite the opening of the chute and to rotate the latter until its hollow axis falls in front of two holes made in the wings of the chute.
  • Such a device has many drawbacks. First, it is expensive because it is complex and has many parts. In addition, it is necessary, when the user wants to be sure, to pivot the articulated lever and fold it between the cheeks of the chute. It is also necessary, and this has the most serious drawback, to place perfectly opposite the two holes of the wings of the chute and the hollow axis in order to engage the safety pin. It is easy to understand that this operation is delicate especially in unfavorable atmospheric conditions.
  • each of the two cheeks of the chute has a blind L-shaped notch opening onto the edge of the corresponding cheek, in that the ends of the axis of articulation of the two elements of the lever protrude laterally to engage in said notches, in that the free end of the element of the lever which does not carry the cam is rotatably mounted about a sliding axis in a slide formed on an extension of one of the cheeks of the chute, in that this axis is loaded elastically in the direction opposite to that of the notches and in that a rocking latch carried by one of the cheeks of the chute is resiliently held in a position in which it closes the bottom of the notch on the corresponding cheek.
  • Fig. 1 is a perspective view of the device according to the invention in the open state.
  • Fig. 2 shows how the articulated lever is folded before it is secured in relation to a safety rope.
  • Fig. 3 is a section along III-III (fig. 2).
  • Fig. 4 is a view similar to that of FIG. 2, but illustrating the last phase of setting up the device according to the invention.
  • Fig. 5 shows the device in the operating position.
  • Fig. 6 is a longitudinal section corresponding to FIG 5.
  • Fig. 7 is a section along VII-VII (fig. 6).
  • Fig. 8 is a view similar to that of FIG. 6, but showing the device according to the invention locked relative to the safety rope.
  • Fig. 9 is a section on a larger scale along IX-IX (fig. 8).
  • Fig. 10 illustrates the manner in which a polarizing finger closes the opening of the notch of one of the cheeks when the device is presented upside down.
  • the fall prevention device essentially comprises, as particularly illustrated in FIG. 1, a chute 1 having in cross section the shape of a U with rounded bottom whose cheeks 10, 11 are parallel and a composite lever 2 rotatably mounted relative to an extension 10 a of the cheek 10, as will be better explained below.
  • Each cheek 10, 11 is provided with an L-shaped notch referenced respectively 10 b and 11 a .
  • the two notches in question are exactly opposite one another.
  • Each notch has an oblique branch opening onto the free edge of each corresponding cheek and a blind branch roughly parallel to said free edges.
  • the extension 10 a of the cheek 10 has a slot 10 c parallel to the geometric axis of the chute 1.
  • the lever 2 comprises a first element 20 shown in two parts 20 a , 20 b but which could be unique.
  • the two parts 20 a and 20 b are articulated around an axis 3.
  • the free end of the part 20 a has a ring 20 ' a while the free end of the part 20 b carries a 20 ′ serrated surface cam b .
  • the two parts 20 a, 20 b are provided with oblique bearing surfaces relative to each other and which allow a certain angular movement of said parts.
  • the second element 21 of the lever 2 is produced in the form of a yoke in one end of which is engaged the part 20 b of the first element 20.
  • An axis 4 passes through the element 21 and the part 20 b so that these two elements are articulated to each other. It is observed that the axis 4 projects laterally outside of each of the wings of the element 21.
  • this element 21 is articulated around an axis 5 which crosses the slot 10 c and carries a head 50 outside the cheek 10 (fig. 3).
  • This head is surrounded by a housing 10 d fixed to the outside of the cheek considered.
  • a spring 6 which elastically loads the axis 5 in the direction of the end of the extension 10 a of the cheek 10.
  • a roller 7 is mounted around the axis 5 with free rotation.
  • a lock 12 is mounted to tilt relative to the cheek 11 of the chute 1 and is loaded by a torsion spring 8 so that in the free position it is held in the position of FIG. 1, that is to say that it closes the blind part of the notch 11 a .
  • a finger 13 sliding freely in a flange 14.
  • the two ends of the finger 13 include a thickening keeping it trapped in the flange 14.
  • a torsion spring 9 is mounted around the axis 4 so as to load the part 20 b of the first element 20 of the lever 2 in a clockwise direction, for reasons which will be better explained further.
  • the user of the device according to the invention begins by hooking a carabiner M or other hook in the ring 20 ' a . It passes the device around the vertical safety rope C which enters between the roller 7 and the bottom of the chute 1, so that this bottom cooperates over its entire length with the rope C.
  • the following operation consists in subjecting the element 21 of the lever 2 to rotate around its axis 5 while maintaining the latter in the direction of the chute 1, so that the axis 4 penetrates into the oblique branch of the two notches causing the latch 12 to tilt to the left (fig. 4).
  • the carabiner M acts suddenly in the downward direction on part 20 a of element 20 of lever 2 which pivots around its axis 3 and acts in the same way on part 20 b of said element 20 in order to apply the cam 20 ' b firmly against the cord C (fig. 9).
  • the device slides very slightly down along the rope before the final immobilization of the user who has fallen.

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Emergency Lowering Means (AREA)
  • Details Of Aerials (AREA)
  • Electric Cable Installation (AREA)
  • Clamps And Clips (AREA)

Abstract

The braking mechanism consists of a lever (2) made from two articulated elements (20,21). The free end of the first element is connected to the harness, while its other end has a cam (20b) to press the cable (C) against the bottom of a U-shaped trough (1), the two sides of which have L-shaped notches (10b,11a) to receive the ends of a pivot pin (4) between the two lever elements. The free end of the second lever element (21) turns about a pivot (5) which can slide in a slot (10c) in an extension (10a) of the trough and is spring-loaded away from the notches. A gravity pin (13) on the trough shuts off the slots in the event of the mechanism being fitted upside-down, and a torsion spring (9) on the pivot (4) between the two lever elements keeps them in line. <IMAGE>

Description

La présente invention est relative à des perfectionnements apportés aux appareils anti-chute reliés d'une part à un harnais porté par un utilisateur et d'autre part à une corde de sécurité par rapport à laquelle l'appareil se verrouille automatiquement en cas de chute de l'utilisateur. De tels types d'appareils sont bien connus et utilisés en particulier par les ouvriers du bâtiment. Quand l'ouvrier se déplace, l'appareil anti-chute coulisse librement par rapport à la corde orientée généralement à la verticale et par laquelle il est assuré contre les chutes. Bien entendu, les appareils en question comportent des moyens de se désolidariser de la corde de sécurité lorsque l'utilisateur quitte le chantier.The present invention relates to improvements made to fall arrest devices connected on the one hand to a harness worn by a user and on the other hand to a safety rope with respect to which the device locks automatically in the event of a fall of the user. Such types of devices are well known and used in particular by construction workers. When the worker is moving, the fall arrest device slides freely with respect to the rope, which is generally oriented vertically and by which it is secured against falls. Of course, the devices in question include means for disconnecting from the safety rope when the user leaves the site.

On connaît de tels dispositifs comportant généralement une gouttière rigide de section transversale en forme de U dont l'une des joues est associée de manière pivotante à l'une des branches d'un axe coudé dont l'autre branche traverse un levier en deux éléments articulés l'un à l'autre au moyen d'un axe creux. Lorsque l'axe coudé est dégagé d'encoches ménagées dans la partie extrême des joues de la goulotte et qu'on le fait pivoter, il est possible d'engager la goulotte de l'appareil autour d'une corde de sécurité. Une fois cette opération effectuée, il faut faire pivoter à nouveau l'axe coudé de manière à amener le levier articulé en face de l'ouverture de la goulotte et faire pivoter ce dernier jusqu'à ce que son axe creux tombe en face de deux trous réalisés dans les ailes de la goulotte. Il faut ensuite engager une goupille dans lesdits trous et dans l'axe creux et prévoir un verrouillage automatique de cette dernière en place. En cas de chute, une came pivotant autour de l'axe creux vient coincer l'appareil par rapport à la corde en empêchant la chute de l'utilisateur.Such devices are generally known comprising a rigid gutter of U-shaped cross section, one of the cheeks of which is pivotally associated with one of the branches of a bent axis, the other branch of which crosses a lever in two elements. articulated to each other by means of a hollow axis. When the bent axis is free of notches formed in the extreme part of the cheeks of the chute and that it is rotated, it is possible to engage the chute of the device around a safety rope. Once this operation has been carried out, it is necessary to pivot the bent axis again so as to bring the articulated lever opposite the opening of the chute and to rotate the latter until its hollow axis falls in front of two holes made in the wings of the chute. It is then necessary to engage a pin in said holes and in the hollow axis and provide for an automatic locking of the latter in place. In the event of a fall, a cam pivoting around the hollow axis will jam the device with respect to the rope, preventing the user from falling.

Un tel dispositif présente de nombreux inconvénients. Il est d'abord coûteux du fait qu'il est complexe et comporte de nombreuses pièces. En outre, il est nécessaire, lorsque l'utilisateut veut s'assurer, de faire pivoter le levier articulé et de le rabattre entre les joues de la goulotte. Il faut encore, et ceci présente l'inconvénient le plus grave, placer parfaitement en vis-à-vis les deux trous des ailes de la goulotte et l'axe creux en vue d'engager la goupille de sécurité. On comprend aisément que cette opération est délicate surtout dans des conditions atmosphériques défavorables.Such a device has many drawbacks. First, it is expensive because it is complex and has many parts. In addition, it is necessary, when the user wants to be sure, to pivot the articulated lever and fold it between the cheeks of the chute. It is also necessary, and this has the most serious drawback, to place perfectly opposite the two holes of the wings of the chute and the hollow axis in order to engage the safety pin. It is easy to understand that this operation is delicate especially in unfavorable atmospheric conditions.

Les perfectionnements qui font l'objet de la présente invention visent à remédier à ces inconvénients et à permettre la réalisation d'un appareil anti-chute qui soit économique et de fonctionnement très simple.The improvements which are the subject of the present invention aim to remedy these drawbacks and to allow the realization of a Fall protection device that is economical and very simple to operate.

L'appareil suivant l'invention est principalement remarquable en ce que chacune des deux joues de la goulotte comporte une encoche borgne en L débouchant sur l'arête de la joue correspondante, en ce que les extrémités de l'axe d'articulation des deux éléments du levier dépassent latéralement pour s'engager dans lesdites encoches, en ce que l'extrémité libre de l'élément du levier qui ne porte pas la came est montée à rotation autour d'un axe coulissant dans une glissière ménagée sur un prolongement de l'une des joues de la goulotte, en ce que cet axe est chargé élastiquement en direction opposée à celle des encoches et en ce qu'un verrou basculant porté par l'une des joues de la goulotte est maintenu élastiquement dans une position dans laquelle il ferme le fond de l'encoche de la joue correspondante.The apparatus according to the invention is mainly remarkable in that each of the two cheeks of the chute has a blind L-shaped notch opening onto the edge of the corresponding cheek, in that the ends of the axis of articulation of the two elements of the lever protrude laterally to engage in said notches, in that the free end of the element of the lever which does not carry the cam is rotatably mounted about a sliding axis in a slide formed on an extension of one of the cheeks of the chute, in that this axis is loaded elastically in the direction opposite to that of the notches and in that a rocking latch carried by one of the cheeks of the chute is resiliently held in a position in which it closes the bottom of the notch on the corresponding cheek.

Le dessin annexé, donné à titre d'exemple, permettra de mieux comprendre l'invention, les caractéristiques qu'elle présente et les avantages qu'elle est susceptible de procurer :The appended drawing, given by way of example, will allow a better understanding of the invention, the characteristics which it presents and the advantages which it is capable of providing:

Fig. 1 est une vue en perspective de l'appareil suivant l'invention à l'état ouvert.Fig. 1 is a perspective view of the device according to the invention in the open state.

Fig. 2 montre comment le Levier articulé est replié avant son assujettisement par rapport à une corde de sécurité.Fig. 2 shows how the articulated lever is folded before it is secured in relation to a safety rope.

Fig. 3 est une coupe suivant III-III (fig. 2).Fig. 3 is a section along III-III (fig. 2).

Fig. 4 est une vue semblable à celle de fig. 2, mais illustrant la dernière phase de mise en place de l'appareil suivant l'invention.Fig. 4 is a view similar to that of FIG. 2, but illustrating the last phase of setting up the device according to the invention.

Fig. 5 montre l'appareil en position de fonctionnement.Fig. 5 shows the device in the operating position.

Fig. 6 est une coupe longitudinale correspondant à fig 5.Fig. 6 is a longitudinal section corresponding to FIG 5.

Fig. 7 est une coupe suivant VII-VII (fig. 6).Fig. 7 is a section along VII-VII (fig. 6).

Fig. 8 est une vue semblable à celle de fig. 6, mais montrant l'appareil suivant l'invention verrouillé par rapport à la corde de sécurité.Fig. 8 is a view similar to that of FIG. 6, but showing the device according to the invention locked relative to the safety rope.

Fig. 9 est une coupe à plus grande échelle suivant IX-IX (fig. 8).Fig. 9 is a section on a larger scale along IX-IX (fig. 8).

Fig. 10 illustre la manière dont un doigt détrompeur ferme le débouché de l'encoche d'une des joues lorsque l'appareil est présenté la tête en bas.Fig. 10 illustrates the manner in which a polarizing finger closes the opening of the notch of one of the cheeks when the device is presented upside down.

L'appareil anti-chute suivant l'invention comprend essentiellement, comme particulièrement illustré en fig. 1, une goulotte 1 présentant en section transversale la forme d'un U à fond arrondi dont les joues 10, 11 sont parallèles et un levier composite 2 monté à rotation par rapport à un prolongement 10a de la joue 10, comme on l'expliquera mieux plus loin.The fall prevention device according to the invention essentially comprises, as particularly illustrated in FIG. 1, a chute 1 having in cross section the shape of a U with rounded bottom whose cheeks 10, 11 are parallel and a composite lever 2 rotatably mounted relative to an extension 10 a of the cheek 10, as will be better explained below.

Chaque joue 10, 11 est pourvue d'une encoche en forme de L référencée respectivement 10b et 11a. Les deux encoches en question se trouvent exactement en vis-à-vis l'une de l'autre. Chaque encoche comporte une branche oblique débouchant sur l'arête libre de chaque joue correspondante et une branche borgne en gros parallèle auxdites arêtes libres.Each cheek 10, 11 is provided with an L-shaped notch referenced respectively 10 b and 11 a . The two notches in question are exactly opposite one another. Each notch has an oblique branch opening onto the free edge of each corresponding cheek and a blind branch roughly parallel to said free edges.

Le prolongement 10a de la joue 10 comporte une fente 10c parallèle à l'axe géométrique de la goulotte 1. Le levier 2 comprend un premier élément 20 représenté en deux pièces 20a, 20b mais qui pourrait être unique. Dans le mode d'exécution représenté, les deux parties 20a et 20b sont articulées autour d'un axe 3. L'extrémité libre de la partie 20a comporte un anneau 20'a tandis que l'extrémité libre de la partie 20b porte une came à surface dentelée 20'b. Les deux parties 20a, 20b sont pourvues de faces d'appui obliques l'une par rapport à l'autre et qui permettent un certain débattement angulaire desdites parties.The extension 10 a of the cheek 10 has a slot 10 c parallel to the geometric axis of the chute 1. The lever 2 comprises a first element 20 shown in two parts 20 a , 20 b but which could be unique. In the embodiment shown, the two parts 20 a and 20 b are articulated around an axis 3. The free end of the part 20 a has a ring 20 ' a while the free end of the part 20 b carries a 20 ′ serrated surface cam b . The two parts 20 a, 20 b are provided with oblique bearing surfaces relative to each other and which allow a certain angular movement of said parts.

Le deuxième élément 21 du levier 2 est réalisé sous la forme d'une chape dans l'une des extrémités de laquelle est engagée la partie 20b du premier élément 20. Un axe 4 traverse l'élément 21 et la partie 20b de manière que ces deux éléments soient articulés l'un à l'autre. On observe que l'axe 4 dépasse latéralement à l'extérieur de chacune des ailes de l'élément 21.The second element 21 of the lever 2 is produced in the form of a yoke in one end of which is engaged the part 20 b of the first element 20. An axis 4 passes through the element 21 and the part 20 b so that these two elements are articulated to each other. It is observed that the axis 4 projects laterally outside of each of the wings of the element 21.

L'autre extrémité de cet élément 21 est articulé autour d'un axe 5 qui traverse la fente 10c et porte une tête 50 à l'extérieur de la joue 10 (fig. 3). Cette tête est entourée par un boîtier 10d fixé à l'extérieur de la joue considérée. Dans le boîtier est placé un ressort 6 qui charge élastiquement l'axe 5 en direction de l'extrémité du prolongement 10a de la joue 10.The other end of this element 21 is articulated around an axis 5 which crosses the slot 10 c and carries a head 50 outside the cheek 10 (fig. 3). This head is surrounded by a housing 10 d fixed to the outside of the cheek considered. In the housing is placed a spring 6 which elastically loads the axis 5 in the direction of the end of the extension 10 a of the cheek 10.

Autour de l'axe 5 est monté à rotation libre un galet 7.A roller 7 is mounted around the axis 5 with free rotation.

Un verrou 12 est monté basculant par rapport à la joue 11 de la goulotte 1 et il est chargé par un ressort de torsion 8 de manière qu'en position libre il soit maintenu dans la position de fig. 1, c'est-à-dire qu'il ferme la partie borgne de l'encoche 11a.A lock 12 is mounted to tilt relative to the cheek 11 of the chute 1 and is loaded by a torsion spring 8 so that in the free position it is held in the position of FIG. 1, that is to say that it closes the blind part of the notch 11 a .

Sur la face extérieure d'une des joues 10 ou 11 est placé un doigt 13 coulissant librement dans une bride 14. Les deux extrémités du doigt 13 comportent un épaississement le maintenant prisonnier dans la bride 14.On the outer face of one of the cheeks 10 or 11 is placed a finger 13 sliding freely in a flange 14. The two ends of the finger 13 include a thickening keeping it trapped in the flange 14.

On observe qu'un ressort de torsion 9 est monté autour de l'axe 4 de manière à charger la partie 20b du premier élément 20 du levier 2 dans le sens des aiguilles d'une montre, pour des raisons qu'on expliquera mieux plus loin.It is observed that a torsion spring 9 is mounted around the axis 4 so as to load the part 20 b of the first element 20 of the lever 2 in a clockwise direction, for reasons which will be better explained further.

Le fonctionnement découle des explications qui précèdent :The operation follows from the above explanations:

L'utilisateur de l'appareil suivant l'invention commence par accrocher un mousqueton M ou autre crochet dans l'anneau 20'a. Il passe l'appareil autour de la corde verticale de sécurité C qui pénètre entre le galet 7 et le fond de la goulotte 1, de manière que ce fond coopère sur toute sa longueur avec la corde C.The user of the device according to the invention begins by hooking a carabiner M or other hook in the ring 20 ' a . It passes the device around the vertical safety rope C which enters between the roller 7 and the bottom of the chute 1, so that this bottom cooperates over its entire length with the rope C.

Comme illustré en fig. 2, il fait basculer le levier 2 librement, de telle sorte que la came 20'b pénètre entre les joues de la goulotte. L'opérateur appuie ensuite sur le deuxième élément 21 dans le sens de la flèche F pour faire coulisser l'axe 5 dans la fente 10c, si bien qu'alors les extrémités dépassantes latéralement de l'axe 4 viennent en fin du débouché des deux encoches 10b, 11a. Le ressort 9 maintient la partie 20b chargée dans le sens des aiguilles d'une montre, c'est-à-dire que la came 20'b est maintenue légèrement en appui contre la corde C.As illustrated in fig. 2, it causes the lever 2 to tilt freely, so that the cam 20 ' b enters between the cheeks of the chute. The operator then presses on the second element 21 in the direction of arrow F to slide the axis 5 into the slot 10 c , so that the laterally protruding ends of the axis 4 come at the end of the outlet of the two notches 10 b , 11 a . The spring 9 maintains the part 20 b loaded in a clockwise direction, that is to say that the cam 20 ′ b is held slightly in abutment against the cord C.

On observe que le doigt 13 est effacé par rapport au débouché de l'encoche 11a du fait que l'appareil est orienté convenablement.It is observed that the finger 13 is erased relative to the outlet of the notch 11 a because the device is oriented properly.

L'opération suivante consiste à faire subir à l'élément 21 du levier 2 une rotation autour de son axe 5 tout en maintenant celui-ci en direction de la goulotte 1, de telle sorte que l'axe 4 pénètre dans la branche oblique des deux encoches en provoquant le basculement du verrou 12 vers la gauche (fig. 4).The following operation consists in subjecting the element 21 of the lever 2 to rotate around its axis 5 while maintaining the latter in the direction of the chute 1, so that the axis 4 penetrates into the oblique branch of the two notches causing the latch 12 to tilt to the left (fig. 4).

En poursuivant le mouvement, on arrive dans la position de fig. 5 dans laquelle les extrémités de l'axe 4 viennent contre le fond des encoches en libérant le verrou 12 qui vient bloquer ledit axe 4 contre ce fond.Continuing the movement, we arrive in the position of fig. 5 in which the ends of the axis 4 come against the bottom of the notches by releasing the latch 12 which comes to block said axis 4 against this bottom.

Dans cette position, la came 20'b n'est pas en contact avec la corde C, comme illustré en fig. 6, de telle sorte que l'utilisateur peut monter et descendre sans que l'appareil suivant l'invention ne se coince par rapport à ladite corde. En Fig. 6 et 7, on observe que la partie 20a de l'élément 20 du levier est libre de se déplacer suivant un certain angle pour éviter tout coincement intempestif de la came par rapport à la corde dans la position normale de travail de l'utilisateur.In this position, the cam 20 ' b is not in contact with the cord C, as illustrated in FIG. 6, so that the user can get on and off without the device according to the invention getting stuck with respect to said rope. In Fig. 6 and 7, it is observed that the part 20 a of the element 20 of the lever is free to move at a certain angle to avoid any untimely jamming of the cam relative to the rope in the normal working position of the user .

En cas de chute, le mousqueton M agit brutalement en direction du bas sur la partie 20a de l'élément 20 du levier 2 qui pivote autour de son axe 3 et vient agir de la même manière sur la partie 20b dudit élément 20 afin d'appLiquer fermememt la came 20'b contre la corde C (fig. 9). Bien entendu, l'appareil glisse très légèrement vers le bas le long de la corde avant l'immobilisation définitive de l'utilisateur ayant fait une chute.In the event of a fall, the carabiner M acts suddenly in the downward direction on part 20 a of element 20 of lever 2 which pivots around its axis 3 and acts in the same way on part 20 b of said element 20 in order to apply the cam 20 ' b firmly against the cord C (fig. 9). Of course, the device slides very slightly down along the rope before the final immobilization of the user who has fallen.

On observe en fig. 10 que si l'utilisateur engage l'appareil suivant l'invention par rapport à la corde C la tête en bas, le doigt 13 se déplace par gravité devant le débouché de l'encoche correspondante de la goulotte 1, de telle sorte que la mise en place de l'axe 4 dans les encoches est impossible. On pourrait prévoir de placer un amortisseur tel qu'un bloc de caoutchouc naturel ou synthétique entre les deux faces d'appui des parties 20a et 20b de l'élément 20 du levier 2 afin d'amortir un peu le choc transmis sur le harnais lors de la chute de l'utilisateur.We observe in fig. 10 that if the user engages the device according to the invention with respect to the cord C upside down, the finger 13 moves by gravity in front of the outlet of the corresponding notch of the chute 1, so that the positioning axis 4 in the notches is impossible. Provision could be made to place a shock absorber such as a block of natural or synthetic rubber between the two bearing faces of the parts 20 a and 20 b of the element 20 of the lever 2 in order to slightly absorb the shock transmitted on the harness when the user falls.

Claims (6)

Appareil anti-chute du genre comprenant un levier (2) réalisé au moyen de deux éléments articulés (20, 21) dont l'extrémité libre du premier (20) est associée à un harnais tandis que son extrémité opposée (21) porte une came (20'b) propre à coincer un lien tel qu'une corde (C) contre le fond d'une goulotte (1) en forme de U par rapport à laquelle ledit levier (2) est en outre articulé, les deux joues de la goulotte (1) comportant chacune une encoche borgne (10b, 11a) en L débouchant sur l'arête de la joue correspondante, ce débouché étant associé à un verrou basculant (12) porté par l'une des joues (11) de la goulotte (1) et maintenu élastiquement dans une position dans laquelle il ferme le fond de l'encoche (11a) de la joue (11) correspondante, caractérisé en ce que les extrémités de l'axe d'articulation (4) des deux éléments (20, 21) du levier (2) qui est indémontable par rapport à ces éléments, dépassent latéralement pour s'engager dans lesdites encoches (10b, 11a), en ce que l'extrémité libre de l'élément (21) du levier (2) qui ne porte pas la came est montée à rotation autour d'un axe (5) coulissant dans une glissière (10c) ménagée sur un prolongement (10a) de l'une (10) des joues de la goulotte (1), et en ce que cet axe (5) est chargé élastiquement en direction opposée à celle des encoches.Anti-fall device of the kind comprising a lever (2) produced by means of two articulated elements (20, 21), the free end of the first (20) of which is associated with a harness while its opposite end (21) carries a cam (20 ' b ) suitable for wedging a link such as a rope (C) against the bottom of a trough (1) in the shape of a U with respect to which said lever (2) is further articulated, the two cheeks of the chute (1) each having a blind recess (10 b, 11 a) the leading edge of the corresponding cheek, this outlet being associated with a pivotable latch (12) carried by one of the cheeks (11) of the chute (1) and held resiliently in a position in which it closes the bottom of the notch (11 a ) of the corresponding cheek (11), characterized in that the ends of the hinge pin (4) of the two elements (20, 21) of the lever (2) which cannot be dismantled with respect to these elements, protrude laterally to engage in the sdites notches (10b, 11a), in that the free end of the element (21) of the lever (2) which does not carry the cam is mounted rotatably about an axis (5) sliding in a slide (10 c ) formed on an extension (10 a ) of one (10) of the cheeks of the chute (1), and in that this axis (5) is loaded elastically in the opposite direction to that of the notches. Appareil anti-chute suivant la revendication 1, caractérisé en ce qu'un doigt (13) fonctionnant par gravité est placé au débouché de l'encoche d'une des joues afin de fermer ce débouché si l'appareil est présenté la tête en bas.Anti-fall device according to claim 1, characterized in that a finger (13) operating by gravity is placed at the outlet of the notch of one of the cheeks in order to close this outlet if the device is presented upside down . Appareil suivant la revendication 1, caractérisé en ce que l'élément du levier (20) portant la came est associé à un ressort de torsion (9) maintenant alignés élastiquement les deux éléments dudit levier.Apparatus according to claim 1, characterized in that the element of the lever (20) carrying the cam is associated with a torsion spring (9) keeping the two elements of said lever resiliently aligned. Appareil suivant la revendication 1, caractérisé en ce que l'élément (20) du levier (2) portant la came (20'b) est réalisé en deux parties (20a, 20b) articulées et munies de faces d'appui.Apparatus according to claim 1, characterized in that the element (20) of the lever (2) carrying the cam (20 ' b ) is made in two parts (20 a , 20 b ) articulated and provided with bearing faces. Appareil suivant la revendication 4, caractérisé en ce qu'entre les faces d'appui des deux parties (20a, 20b) de l'élément (20) du levier portant la came (20'b) est disposé un amortisseur.Apparatus according to claim 4, characterized in that between the bearing faces of the two parts (20 a , 20 b ) of the element (20) of the lever carrying the cam (20 ' b ) is arranged a damper. Appareil suivant la revendication 1, caractérisé en ce qu'un galet (7) est monté fou sur l'axe de rotation (5) du levier (2) par rapport au prolongement (10a) de la joue (10) de la goulotte (1) afin de faciliter la mise en place du lien ou corde (C) dans la goulotte (1) en position ouverte du levier (2).Apparatus according to claim 1, characterized in that a roller (7) is mounted idly on the axis of rotation (5) of the lever (2) relative to the extension (10 a ) of the cheek (10) of the chute (1) to facilitate the establishment of the link or rope (C) in the chute (1) in the open position of the lever (2).
EP95420104A 1994-04-21 1995-04-18 Fall arrest apparatus clamping automatically on a safety line Expired - Lifetime EP0678310B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9405055A FR2720283B1 (en) 1994-04-21 1994-04-21 Anti-fall device locks automatically on a safety rope.
FR9405055 1994-04-21

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EP0678310A1 true EP0678310A1 (en) 1995-10-25
EP0678310B1 EP0678310B1 (en) 2000-07-12

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US (1) US5638919A (en)
EP (1) EP0678310B1 (en)
JP (1) JP3701340B2 (en)
AT (1) ATE194502T1 (en)
CA (1) CA2147233C (en)
DE (1) DE69517850T2 (en)
ES (1) ES2149333T3 (en)
FR (1) FR2720283B1 (en)

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WO1998002210A1 (en) * 1996-07-16 1998-01-22 Tractel S.A. Device for automatically stopping the fall of personnel working high above ground
FR2751233A1 (en) * 1996-07-16 1998-01-23 Tractel Sa AUTOMATIC FALL STOP DEVICE FOR PERSONNEL WORKING AT HEIGHT
CN1100576C (en) * 1996-07-16 2003-02-05 特里克特尔公司 Device for automatically stopping fall of personneel working high above ground
FR2763248A1 (en) * 1997-05-14 1998-11-20 Froment Sa Safety line locking mechanism, e.g. for workers operating on tall buildings
US8225905B2 (en) 2008-11-27 2012-07-24 Zedel Ascender device with cam for belaying on a fixed rope
EP2191870A1 (en) 2008-11-27 2010-06-02 Zedel Blocking device with cam for belaying a fixed rope
FR2938771A1 (en) * 2008-11-27 2010-05-28 Zedel CAM BLOCKING DEVICE FOR FIXED ROPE INSURANCE
WO2013164362A3 (en) * 2012-04-30 2014-06-12 Bornack Gmbh & Co. Kg Securing device with a v-groove
WO2013164366A3 (en) * 2012-04-30 2014-06-19 Bornack Gmbh & Co. Kg Securing device
US10036202B2 (en) 2012-04-30 2018-07-31 Bornack Gmbh & Co. Kg Securing device
WO2019149827A1 (en) * 2018-02-01 2019-08-08 Bornack Gmbh & Co. Kg Securing device
EP3851697A1 (en) * 2020-01-17 2021-07-21 Honeywell International Inc. Fall protection locking system and method for manufacturing same
US11406851B2 (en) 2020-01-17 2022-08-09 Honeywell International Inc. Fall protection locking system
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Also Published As

Publication number Publication date
CA2147233A1 (en) 1995-10-22
ES2149333T3 (en) 2000-11-01
FR2720283B1 (en) 1996-08-23
CA2147233C (en) 2004-12-21
JPH0838634A (en) 1996-02-13
DE69517850T2 (en) 2000-12-07
JP3701340B2 (en) 2005-09-28
ATE194502T1 (en) 2000-07-15
FR2720283A1 (en) 1995-12-01
EP0678310B1 (en) 2000-07-12
DE69517850D1 (en) 2000-08-17
US5638919A (en) 1997-06-17

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