EP0052572A2 - Lifting device, in particular pulley block - Google Patents

Lifting device, in particular pulley block Download PDF

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Publication number
EP0052572A2
EP0052572A2 EP81440025A EP81440025A EP0052572A2 EP 0052572 A2 EP0052572 A2 EP 0052572A2 EP 81440025 A EP81440025 A EP 81440025A EP 81440025 A EP81440025 A EP 81440025A EP 0052572 A2 EP0052572 A2 EP 0052572A2
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EP
European Patent Office
Prior art keywords
sheave
fixed sheave
rope
fixed
axis
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.)
Ceased
Application number
EP81440025A
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German (de)
French (fr)
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EP0052572A3 (en
Inventor
Edouard Singer
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Individual
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Individual
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Publication date
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Publication of EP0052572A2 publication Critical patent/EP0052572A2/en
Publication of EP0052572A3 publication Critical patent/EP0052572A3/en
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D3/00—Portable or mobile lifting or hauling appliances
    • B66D3/04—Pulley blocks or like devices in which force is applied to a rope, cable, or chain which passes over one or more pulleys, e.g. to obtain mechanical advantage
    • 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

Definitions

  • the invention relates to a lifting device, in particular a muffle.
  • a lifting device in particular a muffle consisting of a yoke provided at its upper part with a hooking member, an axis and a sheave, movable on this axis and placed between the two wings of the yoke characterized in that the axis comprises at least one fixed sheave arranged outside the yoke and capable of cooperating, in the event of use in descenders and / or in lift, with the mobile sheave by means of notches made in the wing of the yoke interposed between the mobile sheave and the fixed sheave (s) and allowing the passage of the rope.
  • the fixed sheave has a conical internal flank whose large base is located on the side of the outer periphery of the fixed sheave and whose small base is located on the side of the core.
  • This device provides an elastomer cover fitted on the fixed axis and coming to bear against the fixed sheave.
  • the hood of circular shape, has a rim directed towards the vertical wing of the yoke. This rim maintains the rope on the fixed sheave.
  • French patent No. 2,456,704 discloses improvements made to the lifting device mentioned above consisting of a shoe mounted on a sliding plate and cooperating with the mobile sheave to immobilize the latter.
  • This shoe made of a non-slip material, has, at its upper part, a semi-toroidal boss coming, under the action of the force applied on the rope, to be introduced into the groove of the mobile sheave.
  • This skate has a lower part in the shape of a half sheave provided with a groove adapted to the rope used.
  • the second fixed sheave comprises two flanges with variable spacing, one of which is integral with the external face of the cover applied against the first fixed sheave and the other of which, sliding on the axis, is resiliently recalled for a pinch of the free strand of the cord between the two flanges.
  • Each flange has a flank frustoconical leading, on the one hand, to the external periphery of the flange and, on the other hand, to a shoulder facing and applying one against the other.
  • the movable flange has a housing formed in its outer face in which is placed an elastic element ensuring the elastic return of the movable flange to apply it against the fixed flange.
  • the present invention aims to improve the safety of the device.
  • the invention solves the problem consisting, on the one hand, in annihilating any sliding of the rope which would have simply been placed in the groove of the second fixed sheave by the user without being there wedged while making it impossible to mishandle the rope and, on the other hand, to avoid that the user's hand, drawn by the rope, is trapped between the rope and the bottom of the throat of the second fixed sheave.
  • the lifting device in particular the muffle 1, comprises a yoke 2 formed by two vertical wings 3, 4. Their upper end 5, 6 comprises a head 7, 8 in which a transverse groove 9 is made.
  • this groove 9 is housed at the end 10, 11 of a cross member 12 held by pins 13, 14 including one of the extremi tees is provided with a head 15 and the other end of which has a locking element 16 pivoting about a hinge pin 17.
  • a vertical hole 18 is made in the cross-member 12 serving as a passage for the axis 19 of a handle 20.
  • This has an orifice 21 in which the lower curved end 22 of a hook 23 is engaged.
  • a sleeve 24 is threaded through which an axis 25 ensures the connection between said sleeve 24 and a locking element 26. The latter cooperates with the tip 27 of the hook 23 to prevent the rope from coming out of the loop 28 of said hook 23.
  • the two vertical wings 3, 4 are crossed by a horizontal axis 29, one of the ends 30 of which is provided with a thread 31 on which is screwed a nut 32 housed in a recess 33 produced in a boss 34 integral with the external face 35 of one of the vertical wings 4.
  • a first fixed sheave 43 is applied to the external face 42 of the other vertical wing 3, the face directed towards the vertical wing 3 has a tongue 44 threaded into a groove 45 formed in the external face 42.
  • the first fixed sheave 43 cannot pivot about the horizontal axis 29 passing right through said fixed sheave 43.
  • the latter has a semi-toric groove 46 in which the cord is placed.
  • the fixed sheave 43 is kept applied against the external face 42 of the vertical wing 3 by a shoulder 47 of the horizontal axis 29.
  • This fixed sheave 50 is also threaded on the horizontal axis 29.
  • This fixed sheave 50 has two flanges 51, 52 constituting means for blocking the rope.
  • the outside of these flanges 51, 52 is made of polyester reinforced with glass fibers while the inside is of hard rubber.
  • the inner profile 53, 54 of the two flanges 51, 52 is in the form of a trapezoidal groove 55.
  • the flange 51 directed towards the elastomer cover 49, is fixed and it is made integral with said cover 49 by means of a tongue 56 projecting from the face 57 of the flange 51, this tongue 56 being housed in a groove 58 made in the external face 59 of the cover 49.
  • the second flange 52 slides on the horizontal axis 29 and it is kept applied against the flange 51 by the action of elastic elements 60, 61.
  • These elastic elements 60, 61 threaded on the horizontal axis 29, are trapped between the bottom 62 of a recess 63 formed in the external face 64 of the flange sliding 52, and a guide 65 sliding in a recess 66 leading to the recess 63.
  • This guide 65 has a countersunk hole 67 in which the head 68 of the horizontal axis 29 is embedded.
  • a cord synthetic can self-lock under the action of the pull of the suspended weight ndu to the opposite strand.
  • the slip is practically zero due to the non-slip rubber flange 52 and, at the slightest pull on the opposite strand, a vigorous and instantaneous self-locking a location. In any case, the rope can not slide by sliding.
  • the guide 65 preferably made of cast aluminum, mounted on the external face 64 of the sliding flange 52 of the second fixed sheave 50 comprises two wings 69, 70 provided with a notch 71, 72, these two wings 69, 70 being able to be housed in the recess 66 of the recess 63.
  • This guide 65 obliges the user, when the rope is released, to perform this maneuver in the winding plane of the rope. If the user at the time of the maneuver tended to pull the rope towards himself, that is to say in a vertical position relative to the second fixed sheave 50, the rope would automatically slide into a notch 71, 72 and , in any case, cannot escape by uncontrolled sliding.
  • Two guides are fixed on the outer face 48 of the first fixed sheave 43 73, 74 preferably made of aluminum. These two guides 73, 74 form, with the semi-toric groove 46 of the first fixed sheave, 43, a sheath for guiding the rope with, as an opening, the minimum necessary for the passage of a rope of a given diameter.
  • the muffle 1 can be brought to perform a pendulum movement when the weight attached to the opposite strand of the rope is pushed into the descent position.
  • the rope despite untimely pushing and twisting, remains in the guide sleeve formed by the two guides 73, 74 and the bottom of the semi-toric groove 46 of the first fixed sheave 43. In no case can the rope come out of the braking system.
  • the outer face 35 of the vertical wing 4 has a second boss 75 in which a recess 76 is provided which houses a nut 77 screwed onto the threaded end 78 of a lower horizontal axis 79.
  • a brake shoe 80 On this horizontal axis 79 is threaded a brake shoe 80, one of the outer faces 81 of which has a tongue 82 engaged in a groove 83 produced in the inner face 37 of the vertical wing.
  • the brake shoe 80 made of a non-slip material such as rubber, is mounted on a glass fiber plate 84.
  • the glass fiber plate 84 and the brake shoe 80 have vertical lights 85, 86 in which pass the horizontal axis 79. These lights 85, 86 allow the vertical movement of the plate 84 and the brake shoe 80.
  • the brake shoe 80 has a groove 90 adapted to the rope used which, it , is held in this groove by the curved end 91 of the plate 84.
  • the head 92 of the horizontal axis 79 slides in a milled opening 93 produced in a stop flange 94, the upper end 95 of which is wedged between the first fixed sheave 43 and the external face 42 of the vertical wing 3.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Lift-Guide Devices, And Elevator Ropes And Cables (AREA)
  • Pulleys (AREA)
  • Emergency Lowering Means (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
  • Braking Arrangements (AREA)

Abstract

L'invention concerne un dispositif de levage, en particulier une moufle. Ce dispositif est caractérisé en ce que le premier réa fixe (43) comporte un fourreau de guidage (73, 74) de la corde et que le second réa fixe (50) présente des moyens de blocage (51,52) coopérant avec un guide (65) du brin libre de la corde. L'invention concerne les dispositifs de sécurité en cas de chute.The invention relates to a lifting device, in particular a muffle. This device is characterized in that the first fixed sheave (43) has a guide sleeve (73, 74) for the rope and that the second fixed sheave (50) has locking means (51,52) cooperating with a guide (65) of the free strand of the rope. The invention relates to safety devices in the event of a fall.

Description

L'invention concerne un dispositif de levage, en particulier une moufle.The invention relates to a lifting device, in particular a muffle.

On connaît, par le brevet français n° 2.398.690, un dispositif de levage, en particulier une moufle constituée d'une chape pourvue à sa partie supérieure d'un organe d'accrochage, d'un axe et d'un réa, mobile sur cet axe et placé entre les deux ailes de la chape caractérisé en ce que l'axe comporte au moins un réa fixe disposé à l'extérieur de la chape et pouvant coopérer, en cas d'une utilisation en descenseur et/ou en ascenseur, avec le réa mobile par l'intermédiaire d'échancrures réalisées dans l'aile de la chape interposée entre le réa mobile et le ou les réas fixes et permettant le passage de la corde. Le réa fixe comporte un flanc interne conique dont la grande base est située du côté du pourtour extérieur du réa fixe et dont la petite base est située du côté du noyau. Ce dispositif prévoit un capot en élastomère enfilé sur l'axe fixe et venant s'appliquer contre le réa fixe. Le capot, de forme circulaire, présente un rebord dirigé vers l'aile verticale de la chape. Ce rebord assure le maintien de la corde sur le réa fixe.We know, from French Patent No. 2,398,690, a lifting device, in particular a muffle consisting of a yoke provided at its upper part with a hooking member, an axis and a sheave, movable on this axis and placed between the two wings of the yoke characterized in that the axis comprises at least one fixed sheave arranged outside the yoke and capable of cooperating, in the event of use in descenders and / or in lift, with the mobile sheave by means of notches made in the wing of the yoke interposed between the mobile sheave and the fixed sheave (s) and allowing the passage of the rope. The fixed sheave has a conical internal flank whose large base is located on the side of the outer periphery of the fixed sheave and whose small base is located on the side of the core. This device provides an elastomer cover fitted on the fixed axis and coming to bear against the fixed sheave. The hood, of circular shape, has a rim directed towards the vertical wing of the yoke. This rim maintains the rope on the fixed sheave.

On connaît, par le brevet français n° 2.456.704, des perfectionnements apportés au dispositif de levage cité ci-dessus consistant en un patin monté sur une plaque coulissante et coopérant avec le réa mobile pour immobiliser ce dernier. Ce patin, réalisé en une matière anti-dérapante, comporte, à sa partie supérieure, un bossage semi-torique venant, sous l'action de la force appliquée sur la corde, s'introduire dans la gorge du réa mobile. Ce patin présente une partie inférieure ayant la forme d'un demi-réa pourvu d'une gorge adaptée à la corde employée.French patent No. 2,456,704 discloses improvements made to the lifting device mentioned above consisting of a shoe mounted on a sliding plate and cooperating with the mobile sheave to immobilize the latter. This shoe, made of a non-slip material, has, at its upper part, a semi-toroidal boss coming, under the action of the force applied on the rope, to be introduced into the groove of the mobile sheave. This skate has a lower part in the shape of a half sheave provided with a groove adapted to the rope used.

D'autres perfectionnements, connus par le brevet français n° 2.476.050, ont été apportés au dispositif de levage ci-dessus. Ces perfectionnements consistent en ce que le second réa fixe comporte deux flasques à écartement variable dont l'un est solidaire de la face externe du capot appliqué contre le premier réa fixe et dont l'autre, coulissant sur l'axe, est rappelé élastiquement pour un pincement du brin libre de la corde entre les deux flasques. Chaque flasque présente un flanc tronconique aboutant, d'une part, au pourtour externe du flasque et, d'autre part, à un épaulement se faisant face et s'appliquant l'un contre l'autre. Le flasque mobile comporte un logement pratiqué dans sa face externe dans lequel est placé un élément élastique assurant le rappel élastique du flasque mobile pour l'appliquer contre le flasque fixe.Other improvements, known from French Patent No. 2,476,050, have been made to the above lifting device. These improvements consist in that the second fixed sheave comprises two flanges with variable spacing, one of which is integral with the external face of the cover applied against the first fixed sheave and the other of which, sliding on the axis, is resiliently recalled for a pinch of the free strand of the cord between the two flanges. Each flange has a flank frustoconical leading, on the one hand, to the external periphery of the flange and, on the other hand, to a shoulder facing and applying one against the other. The movable flange has a housing formed in its outer face in which is placed an elastic element ensuring the elastic return of the movable flange to apply it against the fixed flange.

Du fait que, fréquemment une vie humaine dépend du bon fonctionnement du dispositif, la présente invention a pour but de parfaire la sécurité du dispositif.Since human life frequently depends on the proper functioning of the device, the present invention aims to improve the safety of the device.

L'invention, telle qu'elle est caractérisée dans les revendications, résout le problème consistant, d'une part, à annihiler tout glissement de la corde qui aurait été simplement posée dans la gorge du second réa fixe par l'usager sans y être coincée tout en rendant impossible une fausse manoeuvre de la corde et, d'autre part, d'éviter que la main de l'usager, entraînée par la corde, soit coincée entre la corde et le fond de gorge du second réa fixe.The invention, as characterized in the claims, solves the problem consisting, on the one hand, in annihilating any sliding of the rope which would have simply been placed in the groove of the second fixed sheave by the user without being there wedged while making it impossible to mishandle the rope and, on the other hand, to avoid that the user's hand, drawn by the rope, is trapped between the rope and the bottom of the throat of the second fixed sheave.

L'invention est exposée ci-après plus en détail à l'aide de dessins représentant seulement un mode d'exécution.The invention is set out below in more detail with the aid of drawings representing only one embodiment.

  • La figure 1 représente une vue en coupe selon ligne de coupe 1-1 de la figure 2.FIG. 1 represents a sectional view along section line 1-1 of FIG. 2.
  • La figure 2 représente en vue en élévation le dispositif de levage conforme à l'invention.Figure 2 shows in elevational view the lifting device according to the invention.
  • La figure 3 représente une vue reflétée de la figure 1 par rapport à la ligne I-I de la figure 2.FIG. 3 represents a reflected view of FIG. 1 with respect to the line I-I of FIG. 2.

On se réfère aux trois figures.We refer to the three figures.

Le dispositif de levage, en particulier la moufle 1, comporte une chape 2 formée de deux ailes verticales 3, 4. Leur extrémité supérieure 5, 6 comporte une tête 7, 8 dans laquelle on pratique une rainure transversale 9. Dans cette rainure 9 est logée l'extrémité 10, 11 d'une traverse 12 maintenue par des axes 13, 14 dont une des extrémités est pourvue d'une tête 15 et dont l'autre extrémité présente un élément de verrouillage 16 pivotant autour d'un axe d'articulation 17.The lifting device, in particular the muffle 1, comprises a yoke 2 formed by two vertical wings 3, 4. Their upper end 5, 6 comprises a head 7, 8 in which a transverse groove 9 is made. In this groove 9 is housed at the end 10, 11 of a cross member 12 held by pins 13, 14 including one of the extremi tees is provided with a head 15 and the other end of which has a locking element 16 pivoting about a hinge pin 17.

On pratique dans la traverse 12 un trou vertical 18 servant de passage à l'axe 19 d'une anse 20. Celle-ci présente un orifice 21 dans lequel est engagée l'extrémité recourbée inférieure 22 d'un crochet 23. Sur ce crochet 23 est enfilée une douille 24 traversée par un axe 25 assurant la liaison entre ladite douille 24 et un élément de verrouillage 26. Ce dernier coopère avec la pointe 27 du crochet 23 pour éviter que la corde sort de la boucle 28 dudit crochet 23.A vertical hole 18 is made in the cross-member 12 serving as a passage for the axis 19 of a handle 20. This has an orifice 21 in which the lower curved end 22 of a hook 23 is engaged. On this hook 23 a sleeve 24 is threaded through which an axis 25 ensures the connection between said sleeve 24 and a locking element 26. The latter cooperates with the tip 27 of the hook 23 to prevent the rope from coming out of the loop 28 of said hook 23.

Les deux ailes verticales 3, 4 sont traversées par un axe horizontal 29 dont une des extrémités 30 est pourvue d'un filetage 31 sur lequel est vissé un écrou 32 logé dans un évidement 33 réalisé dans un bossage 34 solidaire de la face externe 35 de l'une des ailes verticales 4.The two vertical wings 3, 4 are crossed by a horizontal axis 29, one of the ends 30 of which is provided with a thread 31 on which is screwed a nut 32 housed in a recess 33 produced in a boss 34 integral with the external face 35 of one of the vertical wings 4.

On dispose entre les faces internes 36, 37 des deux ailes verticales 3, 4 un réa mobile 38 enfilé sur une douille 39 elle-même enfilée sur l'axe horizontal 29. On intercale entre la douille 39 fixe en rotation et le réa mobile 38 un roulement à aiguilles 40. Ce réa mobile 38 comporte une gorge 41 pour la corde (non représentée).There is between the internal faces 36, 37 of the two vertical wings 3, 4 a movable sheave 38 threaded on a bush 39 itself threaded on the horizontal axis 29. One interposed between the bush 39 fixed in rotation and the sheave mobile 38 a needle bearing 40. This mobile sheave 38 has a groove 41 for the rope (not shown).

On applique sur la face externe 42 de l'autre aile verticale 3 un premier réa fixe 43 dont la face dirigée vers l'aile verticale 3 présente une languette 44 enfilée dans une rainure 45 pratiquée dans la face externe 42. De ce fait, le premier réa fixe 43 ne peut pivoter autour de l'axe horizontal 29 traversant de part en part ledit réa fixe 43. Ce dernier présente une gorge semi-torique 46 dans laquelle vient se placer la corde. Le réa fixe 43 est maintenu appliqué contre la face externe 42 de l'aile verticale 3 par un épaulement 47 de l'axe horizontal 29.A first fixed sheave 43 is applied to the external face 42 of the other vertical wing 3, the face directed towards the vertical wing 3 has a tongue 44 threaded into a groove 45 formed in the external face 42. As a result, the first fixed sheave 43 cannot pivot about the horizontal axis 29 passing right through said fixed sheave 43. The latter has a semi-toric groove 46 in which the cord is placed. The fixed sheave 43 is kept applied against the external face 42 of the vertical wing 3 by a shoulder 47 of the horizontal axis 29.

Contre la face extérieure 48 du premier réa fixe 43 prend appui un capot en élastomère 49 servant d'élément de séparation entre le premier réa fixe 43 et un second réa fixe 50. Ce réa fixe 50 est également enfilé sur l'axe horizontal 29. Ce réa fixe 50 comporte deux flasques 51, 52 constituant des moyens de blocage de la corde. Selon l'invention, l'extérieur de ces flasques 51, 52 est en polyester renforcé de fibres de verre alors que l'intérieur est en caoutchouc dur. Le profil intérieur 53, 54 des deux flasques 51, 52 est en forme de gorge tra- pézoidale 55. Le flasque 51, dirigé vers le capot en élastomère 49, est fixe et il est rendu solidaire dudit capot 49 par l'intermédiaire d'une languette 56 faisant saillie par rapport à la face 57 du flasque 51, cette languette 56 étant logée dans une rainure 58 réalisée dans la face externe 59 du capot 49. Le second flasque 52 coulisse sur l'axe horizontal 29 et il est maintenu appliqué contre le flasque 51 par l'action d'éléments élastiques 60, 61. Ces éléments élastiques 60, 61, enfilés sur l'axe horizontal 29, sont emprisonnés entre le fond 62 d'un évidement 63 pratiqué dans la face externe 64 du flasque coulissant 52, et un guide 65 coulissant dans un décrochement 66 aboutant à l'évidement 63. Ce guide 65 présente un trou fraisé 67 dans lequel est noyée la tête 68 de l'axe horizontal 29. Dans la gorge tra- pézoidale 55 une corde synthétique peut s'autobloquer sous l'action de la traction du poids suspendu au brin opposé.Against the outer face 48 of the first fixed sheave 43 is supported an elastomer cover 49 serving as a separating element between the first fixed sheave 43 and a second fixed sheave 50. This fixed sheave 50 is also threaded on the horizontal axis 29. This fixed sheave 50 has two flanges 51, 52 constituting means for blocking the rope. According to the invention, the outside of these flanges 51, 52 is made of polyester reinforced with glass fibers while the inside is of hard rubber. The inner profile 53, 54 of the two flanges 51, 52 is in the form of a trapezoidal groove 55. The flange 51, directed towards the elastomer cover 49, is fixed and it is made integral with said cover 49 by means of a tongue 56 projecting from the face 57 of the flange 51, this tongue 56 being housed in a groove 58 made in the external face 59 of the cover 49. The second flange 52 slides on the horizontal axis 29 and it is kept applied against the flange 51 by the action of elastic elements 60, 61. These elastic elements 60, 61, threaded on the horizontal axis 29, are trapped between the bottom 62 of a recess 63 formed in the external face 64 of the flange sliding 52, and a guide 65 sliding in a recess 66 leading to the recess 63. This guide 65 has a countersunk hole 67 in which the head 68 of the horizontal axis 29 is embedded. In the trapezoidal groove 55 a cord synthetic can self-lock under the action of the pull of the suspended weight ndu to the opposite strand.

Au cas où la corde n'est que posée dans la gorge 55, sans y être coincée, le glissement est pratiquement nul du fait du flasque en caoutchouc antidérapant 52 et, à la moindre traction sur le brin opposé, un autoblocage vigoureux et instantané a lieu. En aucun cas, la corde ne peut défiler par glissement.If the rope is only placed in the groove 55, without being trapped there, the slip is practically zero due to the non-slip rubber flange 52 and, at the slightest pull on the opposite strand, a vigorous and instantaneous self-locking a location. In any case, the rope can not slide by sliding.

Le guide 65 de préférence en aluminium coulé, monté sur la face externe 64 du flasque coulissant 52 du second réa fixe 50 comporte deux ailes 69, 70 pourvue.sd'une échancrure 71, 72, ces deux ailes 69, 70 pouvant se loger dans le décrochement 66 de l'évidement 63. Ce guide 65 oblige l'usager, au moment du déblocage de la corde, d'effectuer cette manoeuvre dans le plan d'enroulement de la corde. Si l'usager au moment de la manoeuvre avait tendance à tirer la corde vers soi, c'est-à-dire dans une position verticale par rapport au second réa fixe 50, la corde viendrait se glisser automatiquement dans une échancrure 71, 72 et, en aucun cas, ne peut se défiler par glissement incontrôlé.The guide 65 preferably made of cast aluminum, mounted on the external face 64 of the sliding flange 52 of the second fixed sheave 50 comprises two wings 69, 70 provided with a notch 71, 72, these two wings 69, 70 being able to be housed in the recess 66 of the recess 63. This guide 65 obliges the user, when the rope is released, to perform this maneuver in the winding plane of the rope. If the user at the time of the maneuver tended to pull the rope towards himself, that is to say in a vertical position relative to the second fixed sheave 50, the rope would automatically slide into a notch 71, 72 and , in any case, cannot escape by uncontrolled sliding.

On fixe sur la face extérieure 48 du premier réa fixe 43 deux guides 73, 74 réalisés de préférence en aluminium. Ces deux guides 73, 74 forment, avec la gorge semi-torique 46 du premier réa fixe-, 43, un fourreau de guidage de la corde avec, comme ouverture, lewminimum nécessaire pour le passage d'une corde d'un diamètre donné.Two guides are fixed on the outer face 48 of the first fixed sheave 43 73, 74 preferably made of aluminum. These two guides 73, 74 form, with the semi-toric groove 46 of the first fixed sheave, 43, a sheath for guiding the rope with, as an opening, the minimum necessary for the passage of a rope of a given diameter.

Au moment du déblocage se produit un glissement de la corde sous l'action du poids accroché au brin opposé. La main de l'usager, entraînée par la corde, sera retenue par l'un des guides 73, 74 évitant de ce fait que la main soit coincée entre la corde et le fond de la gorge semi-torique 46.At the time of release there is a slip of the rope under the action of the weight attached to the opposite strand. The user's hand, driven by the cord, will be retained by one of the guides 73, 74 thereby preventing the hand from being wedged between the cord and the bottom of the semi-toric groove 46.

D'autre part, la moufle 1 peut être amenée à effectuer un mouvement pendulaire au moment où le poids accroché au brin opposé de la corde sera poussé en position de descente. La corde, malgré les poussées et torsions intempestives, reste dans le fourreau de guidage formé par les deux guides 73, 74 et le fond de la gorge semi-torique 46 du premier réa fixe 43. En aucun cas, la corde ne peut sortir du système de freinage.On the other hand, the muffle 1 can be brought to perform a pendulum movement when the weight attached to the opposite strand of the rope is pushed into the descent position. The rope, despite untimely pushing and twisting, remains in the guide sleeve formed by the two guides 73, 74 and the bottom of the semi-toric groove 46 of the first fixed sheave 43. In no case can the rope come out of the braking system.

La face externe 35 de l'aile verticale 4 comporte un second bossage 75 dans lequel on pratique un évidement 76 servant de logement à un écrou 77 vissé sur l'extrémité filetée 78 d'un axe horizontal inférieur 79. Sur cet axe horizontal 79 est enfilé un patin de freinage 80 dont une des faces extérieures 81 comporte une languette 82 engagée dans une rainure 83 réalisée dans la face interne 37 de l'aile verticale. Le patin de freinage 80, réalisé dans une matière anti-dérapante tel que du caoutchouc, est monté sur une plaque en fibres de verre 84. La plaque de fibres de verre 84 et le patin de freinage 80 présentent des lumières verticales 85, 86 dans lesquelles passe l'axe horizontal 79. Ces lumières 85, 86 permettent le déplacement vertical de la plaque 84 et du patin de freinage 80. Au cours de ce déplacement vertical dû à l'action de la force appliquée sur la corde, un bossage semi-torique 87 solidaire de la partie supérieure 88 du patin de freinage 80 vient s'engager dans la gorge 41 du réa mobile 38. A sa partie inférieure 89, le patin de freinage 80 présente une gorge 90 adaptée à la corde employée qui, elle, est maintenue dans cette gorge par l'extrémité recourbée 91 de la plaque 84.The outer face 35 of the vertical wing 4 has a second boss 75 in which a recess 76 is provided which houses a nut 77 screwed onto the threaded end 78 of a lower horizontal axis 79. On this horizontal axis 79 is threaded a brake shoe 80, one of the outer faces 81 of which has a tongue 82 engaged in a groove 83 produced in the inner face 37 of the vertical wing. The brake shoe 80, made of a non-slip material such as rubber, is mounted on a glass fiber plate 84. The glass fiber plate 84 and the brake shoe 80 have vertical lights 85, 86 in which pass the horizontal axis 79. These lights 85, 86 allow the vertical movement of the plate 84 and the brake shoe 80. During this vertical movement due to the action of the force applied to the rope, a semi boss -torique 87 secured to the upper part 88 of the brake shoe 80 engages in the groove 41 of the mobile sheave 38. At its lower part 89, the brake shoe 80 has a groove 90 adapted to the rope used which, it , is held in this groove by the curved end 91 of the plate 84.

La tête 92 de l'axe horizontal 79 coulisse dans une lumière fraisée 93 réalisée dans un flasque d'arrêt 94 dont l'extrémité supérieure 95 est coincée entre le premier réa fixe 43 et la face externe 42 de l'aile verticale 3.The head 92 of the horizontal axis 79 slides in a milled opening 93 produced in a stop flange 94, the upper end 95 of which is wedged between the first fixed sheave 43 and the external face 42 of the vertical wing 3.

Claims (4)

1. Dispositif de levage en particulier une moufle constituée d'une chape (2) pourvue à sa partie supérieure (5,6) d'un organe d'accrochage (23), d'un axe fixe (29), d'un réa mobile (38) en rotation sur cet axe (29) et placé entre les deux ailes (3,4) de la chape (2), d'un premier réa fixe (43) placé à l'extérieur de la chape (2) et enfilé sur l'axe (29), d'un capot en élastomère (49) placé entre le premier réa fixe (43) et un second réa fixe (50) formé de deux flasques (51,52) dont un (52), rappelé élastiquement, coulisse sur l'axe (29) et d'un patin de freinage (80) monté sur une plaque coulissante (84) et coopérant avec le réa mobile (38), caractérisé en ce que le premier réa fixe (43) comporte un fourreau de guidage (73, 74) de la corde et que le second réa fixe (50) présente des moyens de blocage (51, 52) coopérant avec un guide (65) du brin libre de la corde.1. Lifting device in particular a muffle consisting of a yoke (2) provided at its upper part (5,6) with a hooking member (23), a fixed axis (29), a mobile sheave (38) rotating on this axis (29) and placed between the two wings (3,4) of the yoke (2), a first fixed sheave (43) placed outside the yoke (2 ) and threaded on the axis (29), of an elastomer cover (49) placed between the first fixed sheave (43) and a second fixed sheave (50) formed by two flanges (51,52) including one (52 ), resiliently recalled, slides on the axis (29) and a brake shoe (80) mounted on a sliding plate (84) and cooperating with the mobile sheave (38), characterized in that the first sheave fixes ( 43) comprises a guide sleeve (73, 74) for the rope and that the second fixed sheave (50) has locking means (51, 52) cooperating with a guide (65) of the free strand of the rope. 2. Dispositif selon la revendication 1, caractérisé en ce que le fourreau de guidage est constitué, d'une part, de deux guides (73,74) solidaires de la face extérieure (48) du premier réa fixe (43) et, d'autre part, d'une gorge semi-torique (46) dudit réa fixe (43), ce fourreau de guidage ayant une ouverture minima nécessaire pour le passage d'une corde d'un diamètre donné.2. Device according to claim 1, characterized in that the guide sleeve consists, on the one hand, of two guides (73,74) integral with the external face (48) of the first fixed sheave (43) and, d 'other hand, a semi-toric groove (46) of said fixed sheave (43), this guide sleeve having a minimum opening necessary for the passage of a rope of a given diameter. 3. Dispositif selon la revendication 1, caractérisé en ce que les moyens de blocage sont constitués par des flasques (51,52) dont l'extérieur est en polyester renforcé de fibres de verre et dont l'intérieur est en caoutchouc dur, ces flasques (51, 52) formant le second réa fixe (50) étant composés d'un flasque fixe (51) et d'un flasque coulissant (52).3. Device according to claim 1, characterized in that the locking means consist of flanges (51,52) whose outside is made of polyester reinforced with glass fibers and whose inside is made of hard rubber, these flanges (51, 52) forming the second fixed sheave (50) being composed of a fixed flange (51) and a sliding flange (52). 4. Dispositif selon la revendication 1, caractérisé en ce que le guide (65) comporte deux ailes (69,70) pourvues d'une échancrure (71,72) et coopérant avec un décrochement (66) pratiqué dans un évidement (63) réalisé dans la face externe (64) du flasque coulissant (52) du second réa fixe (50).4. Device according to claim 1, characterized in that the guide (65) comprises two wings (69,70) provided with a notch (71,72) and cooperating with a recess (66) formed in a recess (63) produced in the external face (64) of the sliding flange (52) of the second fixed sheave (50).
EP81440025A 1980-11-19 1981-10-20 Lifting device, in particular pulley block Ceased EP0052572A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8024713A FR2494247A2 (en) 1980-11-19 1980-11-19 LIFTING DEVICE IN PARTICULAR MITTEN
FR8024713 1980-11-19

Publications (2)

Publication Number Publication Date
EP0052572A2 true EP0052572A2 (en) 1982-05-26
EP0052572A3 EP0052572A3 (en) 1984-01-04

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ID=9248205

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Application Number Title Priority Date Filing Date
EP81440025A Ceased EP0052572A3 (en) 1980-11-19 1981-10-20 Lifting device, in particular pulley block

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US (1) US4466599A (en)
EP (1) EP0052572A3 (en)
CA (1) CA1172625A (en)
ES (1) ES507247A0 (en)
FR (1) FR2494247A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2604988A1 (en) * 1986-10-01 1988-04-15 Petzl Fernand Safety pulley device for lowering and lifting people or loads along a rope
AU617484B2 (en) * 1988-06-22 1991-11-28 CQ Inspection & Maintenance Services Pty Ltd Pulley block assembly

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US5387186A (en) * 1993-10-15 1995-02-07 Edland; Mitchell R. Self-standing traction apparatus
US5634873A (en) * 1994-09-08 1997-06-03 Strong River Corporation Hamstring stretching device and method
US7419138B1 (en) * 2007-02-23 2008-09-02 Cmc Rescue, Inc. Self-camming pulley
CN101549191B (en) * 2008-04-02 2012-05-30 俞关清 High building lifesaving descent control device
US20130043450A1 (en) * 2011-08-19 2013-02-21 Russ Kommer Lifting or locking system and method
US9173386B2 (en) * 2012-08-13 2015-11-03 Rupp Marine, Inc. Outrigger line lock positioning device
CN104724607A (en) * 2015-01-29 2015-06-24 徐工集团工程机械股份有限公司 Steel wire rope groove-releasing protection device and mounting method thereof
CN110190557B (en) * 2019-07-04 2024-08-20 广西送变电建设有限责任公司 Net sealing device and net sealing pulley thereof

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FR442199A (en) * 1911-04-26 1912-08-26 Charles Dewever Friction winch for rescue in case of fire
GB287907A (en) * 1927-03-29 1928-05-31 Ane Pieter Schat Improvements in pulley blocks
GB310395A (en) * 1928-01-24 1929-04-24 Walter Burrows Improvements in, and relating to rope rollers or pulleys for haulage work
US2623732A (en) * 1949-06-18 1952-12-30 Kenneth F Morgan Pulley winch
GB1048303A (en) * 1964-04-27 1966-11-16 William Thomas Leishman Emergency lowering devices
DE2237622A1 (en) * 1972-07-31 1974-04-11 Heri Dipl Ing Schuller Descender for rescue from fire hazard
DE2258424A1 (en) * 1972-11-29 1974-05-30 Heri Dipl-Ing Schuller SINGLE-ROPE DESCENT DEVICE
DE2342244A1 (en) * 1972-07-31 1975-02-27 Heri Dipl Ing Schuller Abseil appts for fire rescue - has securing pin guided relative to bollard axis and brake surface nails to bound cable motion
DE2432716A1 (en) * 1974-02-19 1976-01-29 Schuller Geb Schlenker Heidi Chair hoist for inspection or repair on walls of tall buildings - eliminating or reducing recovery of slack of lowering cable
EP0019574A1 (en) * 1979-05-18 1980-11-26 Edouard Singer Lifting device, especially pulley block

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US1130713A (en) * 1914-11-27 1915-03-09 Walter J Daly Clothes-line support.
FR2398690A1 (en) * 1977-07-27 1979-02-23 Singer Edouard LIFTING DEVICE IN PARTICULAR MITTEN
FR2476050B2 (en) * 1977-07-27 1985-06-14 Singer Edouard LIFTING DEVICE, PARTICULARLY MOUFLE

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR442199A (en) * 1911-04-26 1912-08-26 Charles Dewever Friction winch for rescue in case of fire
GB287907A (en) * 1927-03-29 1928-05-31 Ane Pieter Schat Improvements in pulley blocks
GB310395A (en) * 1928-01-24 1929-04-24 Walter Burrows Improvements in, and relating to rope rollers or pulleys for haulage work
US2623732A (en) * 1949-06-18 1952-12-30 Kenneth F Morgan Pulley winch
GB1048303A (en) * 1964-04-27 1966-11-16 William Thomas Leishman Emergency lowering devices
DE2237622A1 (en) * 1972-07-31 1974-04-11 Heri Dipl Ing Schuller Descender for rescue from fire hazard
DE2342244A1 (en) * 1972-07-31 1975-02-27 Heri Dipl Ing Schuller Abseil appts for fire rescue - has securing pin guided relative to bollard axis and brake surface nails to bound cable motion
DE2258424A1 (en) * 1972-11-29 1974-05-30 Heri Dipl-Ing Schuller SINGLE-ROPE DESCENT DEVICE
DE2432716A1 (en) * 1974-02-19 1976-01-29 Schuller Geb Schlenker Heidi Chair hoist for inspection or repair on walls of tall buildings - eliminating or reducing recovery of slack of lowering cable
EP0019574A1 (en) * 1979-05-18 1980-11-26 Edouard Singer Lifting device, especially pulley block

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2604988A1 (en) * 1986-10-01 1988-04-15 Petzl Fernand Safety pulley device for lowering and lifting people or loads along a rope
AU617484B2 (en) * 1988-06-22 1991-11-28 CQ Inspection & Maintenance Services Pty Ltd Pulley block assembly

Also Published As

Publication number Publication date
ES8300634A1 (en) 1982-11-01
EP0052572A3 (en) 1984-01-04
ES507247A0 (en) 1982-11-01
FR2494247A2 (en) 1982-05-21
CA1172625A (en) 1984-08-14
US4466599A (en) 1984-08-21

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