EP1175367B1 - Automatic braking system of a lift cage - Google Patents

Automatic braking system of a lift cage Download PDF

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Publication number
EP1175367B1
EP1175367B1 EP00925371A EP00925371A EP1175367B1 EP 1175367 B1 EP1175367 B1 EP 1175367B1 EP 00925371 A EP00925371 A EP 00925371A EP 00925371 A EP00925371 A EP 00925371A EP 1175367 B1 EP1175367 B1 EP 1175367B1
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EP
European Patent Office
Prior art keywords
pulley
car
stopping
braking system
stopping mechanism
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.)
Expired - Lifetime
Application number
EP00925371A
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German (de)
French (fr)
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EP1175367A1 (en
Inventor
Jean-Yves Bluteau
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ThyssenKrupp Elevator Manufacturing France SAS
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ThyssenKrupp Elevator Manufacturing France SAS
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Publication of EP1175367A1 publication Critical patent/EP1175367A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/04—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions for detecting excessive speed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66B—ELEVATORS; ESCALATORS OR MOVING WALKWAYS
    • B66B5/00—Applications of checking, fault-correcting, or safety devices in elevators
    • B66B5/02—Applications of checking, fault-correcting, or safety devices in elevators responsive to abnormal operating conditions
    • B66B5/16—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well
    • B66B5/18—Braking or catch devices operating between cars, cages, or skips and fixed guide elements or surfaces in hoistway or well and applying frictional retarding forces

Definitions

  • the present invention relates to an automatic braking system of a elevator car designed to stop it when it reaches or exceeds a speed displacement limit inside an elevator shaft.
  • FIG. 1 An elevator installation which is equipped with a braking system according to the known state of the art.
  • This installation is essentially consisting of an elevator car 10 which is moved between the different floors of an elevator shaft (not shown), for example by means of a machinery 20 acting on a cable or a bundle of traction cables 21 and comprising a counterweight 22.
  • the elevator car 10 is guided in its movement by side rails extending vertically in the elevator shaft and on which the cabin 10 is supported by guides 31. For the sake of clarity, only one of these rails 30 has been shown in FIG. 1.
  • the elevator car 10 has a control mechanism 11 provided for control the action of the brakes 12 and 13 shown here schematically in the form simple corners.
  • the brakes 12 and 13 generally act on the rails 30 of the elevator car 10.
  • These brakes 12 and 13 are also known in the field of the technique under the name of "parachute clip". They act one in a sense of movement of the cabin 10, the other in the other direction.
  • the automatic braking system includes a stop pulley 50 which is mounted on the masonry in the upper part of the elevator shaft and a cable endless 60 wound between the stop pulley 50 and a return pulley 51.
  • the cable without end 60 is tensioned by means of a tension mass 52 urging the return pulley 51.
  • a control mechanism 53 is, on the one hand, fixed on the endless cable 60 and, on the other hand, on the cabin 53. In normal operation, that is to say when the speed movement of cabin 10 is less than a speed limit, cabin 10 drives the cable 60. The mechanism 53 is not stressed and therefore does not act on the control mechanism 11 for brakes 12 and 13.
  • the object of the present invention is to propose a braking system which does not not have the disadvantages of braking systems of the prior art, in particular those which have been exposed above, and which is consequently of a clutter reduced compared to those of the prior art and which is not mounted on the same piece of masonry as that on which the drive motor rests.
  • said mechanism stop device is mounted on said cabin, said stop mechanism or a part thereof being provided for, in response to movement of said cabin when said pulley stop is blocked, move relative to said cabin in one direction substantially parallel to the direction of said cabin. Said control mechanism then acts on said brakes when said stop mechanism or said part thereof moves relative to said cabin.
  • said stop pulley is driven by a control cable which hangs vertically in the elevator shaft and goes down its throat.
  • said mechanism stop comprises two pulleys, one of which is said stop pulley, said cable control having its upper vertical strand passing through the lower part of a first groove of one of said pulleys, then passing into the groove of the second pulley then ironing in the upper part of the second groove of said first pulley.
  • Said first pulley can then constitute the part of the stop mechanism which, in reaction to the movement of said cabin when said stop pulley is blocked, moves relative to said cabin.
  • said mechanism stop comprises at least two pulleys, one of which is said stop pulley, said cable control passing through each of said grooves of said pulleys.
  • Said upstream pulley and said downstream pulley constitute the part of the mechanism which, in reaction to the movement of said cabin when said stop pulley is blocked, moves relative to said cabin.
  • said stop mechanism or said part of said stop mechanism are mounted at the end of a pivoting arm, said arm moving away from its rest position stressing the control mechanism which then acts on said brakes.
  • said stop mechanism or said part of said stop mechanism are mounted on slides extending substantially in the direction of movement of said cabin, said slide in deviating from its rest position stressing the control mechanism which then acts on said brakes.
  • said stop mechanism or said part of said stop mechanism are provided with a retractable rod which can, when it is not retractable, come into contact with stops provided in said elevator shaft, which has the effect of displacing said stop mechanism or said part of said stop mechanism in relation to said cabin and to request said control mechanism which then acts on said brakes.
  • the elevator installation shown in FIG. 2 is essentially constituted an elevator car 10 which is moved between the different floors of a shaft elevator (not shown), for example by means of machinery 20 acting on a traction cable or a bundle of cables 21 and comprising a counterweight 22.
  • This machinery 20 is for example mounted on the masonry constituting the part upper part of the elevator car.
  • the elevator car 10 is guided in its movement by guides side extending vertically in the elevator shaft. For the sake of clarity, we have shown only one of these rails 30.
  • the elevator car 10 has a control mechanism 11 (shown schematically by a simple dotted line) provided for controlling the action of the brakes 12 and 13 shown schematically in FIG. 2 in the form of corners.
  • Brakes 12 and 13 act on the guides of the elevator car 10.
  • These brakes 12 and 13 are also known in the technical field under the name of "parachute clamp". They act one in one direction of movement of the cabin 10, the other in the other direction.
  • the elevator car 10 includes a stop mechanism 40 here consisting of a stop pulley 41 and a return pulley 42.
  • the stop pulley 41 is of the type which rotates freely as long as its rotational speed does not exceed a threshold speed, and which freezes when its speed of rotation exceeds said threshold speed of rotation.
  • the system 40 is mounted under the cabin 10, for example on the chassis thereof. But we will understand, in particular thereafter, that it could be mounted, for example on the same chassis, in the upper part of the cabin 10, or elsewhere when it is integral with the cabin 10.
  • a control cable 60 which extends vertically in the elevator shaft in which operates said elevator car 10, passes in the lower part of a first groove of the return pulley 42, then passes into the groove of the stop pulley 41 in order to be able to drive it in rotation at the same time as the cabin 10 moves in the elevator shaft, and finally, in the upper part of a second groove of the return pulley 42.
  • Its lower end includes a tensioning system such that a mass 61 (or a spring or other), while its upper end is connected to the sheath ceiling by means of an elastic system 62.
  • the mass of tension 61 and elastic system 62 are provided to ensure the tension of the cable order 60
  • the idler pulley 42 is free rotationally mounted at the free end of an arm 43 intended to pivot around a pivot axis 44.
  • the stop pulleys 41 and return 42 have axes of rotation mutually parallel and parallel to the pivot axis 44 of the arm 43.
  • the arm 43 acts on the control mechanism 11 in the following manner.
  • the control mechanism 11 When the arm 43 is in a substantially horizontal position, called the position of rest, like that shown in FIG. 2, the control mechanism 11 is not used and the brakes 12 and 13 are inactive. However, when he takes a tilted position, called working position, in one direction or another, the mechanism 11 is acted upon, which has the effect of activating the brakes 12 and 13, thereby stopping the cabin 10 on its rails 30.
  • the arm 43 can be constrained in this rest position, by example by means of elastic elements, such as springs (not shown).
  • the speed of rotation of the stop pulley 41 becomes greater than its threshold speed of rotation. Through therefore, it locks up, making it impossible to run the control cable 60 in the stop mechanism 40.
  • the return pulley 42 is then immobilized relative to the control cable 60 and relative to the sheath (near displacement cable 60 allowed by elastic means 62).
  • the arm 43 pivots around its axis of pivoting 44. This results in an action on the control mechanism 11, which has the effect of blocking the brakes 12 and 13 on the rails 30.
  • the elevator car 10 is then stopped.
  • the arm 43 constitutes means allowing the movement of the stop mechanism 40 or a part of it mechanism 40 in the direction of advancement of the cabin 10 when the cable control 60 is blocked by the stop pulley 41, and the cabin 10, by inertia, still exhibits movement.
  • the stop mechanism 40 could include a plurality of pulleys (at least two), one of which would be a stop pulley 41, and at least one other would be mounted so that it could move in the direction of advancement of the cabin, for example at the end of an arm such as the arm 43 ..
  • the return pulley 42 is a pulley with two grooves provided, on the one hand, to receive the upper vertical strand of cable 60 and return it to the stop pulley 41 and, on the other hand, to receive the strand coming from the stop pulley 41 and to return it as a lower vertical strand.
  • Fig. 4 an alternative embodiment is shown where the arm 43 shown in Figs. 1 and 2 is replaced by a slide 46 parallel to the direction of advance of the cabin 10 in which the axis of rotation 47 of the deflection pulley 42 can be move when the control cable 60 is blocked in the stop pulley 41.
  • the return pulley 42 is shown in its rest position in which the axis of rotation is substantially at the center of the slide 46. The mechanism 11 is stressed when axis 47 is no longer in its central rest position, but is discarded.
  • Fig. 5 is an alternative embodiment which comprises two pulleys 42a and 42b which are mounted to rotate freely at the ends of a slider 48 provided to be able to move in translation in a direction parallel to the direction of movement of the elevator car 10.
  • the slide 48 is mounted for this purpose in a slide 49 extending vertically in the direction of advancement of the cabin 10.
  • the slide 48 is here shown in its rest position.
  • stop pulley 41 could be put in place of a deflection pulley 42, 42a or 42b, and that it would then replaced by a deflection pulley.
  • FIG. 6 there is shown an elevator installation which is identical to that already shown in FIG. 2 and which additionally comprises a safety device 90.
  • This safety device 90 consists essentially of a rod 91 which is retractable under the action of a control device such as an electromagnet 92, which is mounted on the pivoting arm 43.
  • a control device such as an electromagnet 92
  • FIG. 6 the retractable position of the rod 91 is shown in strong lines, while its extended position is shown in dotted lines.
  • the rod 91 When the rod 91 is in the not retracted position, it can come into contact with one or more stops 93 which are provided in the elevator shaft. However, in retracted position, it cannot come into contact with these stops 93.

Abstract

An automatic Braking system for an elevator car (10) is designed to stop it when it reaches or exceeds a speed limit of movement within an elevator shaft. A stop mechanism (40) is mounted on car (10), or a part thereof, so as to lock a stop pulley (41) which then moves relative to the car in a direction substantially parallel to the direction of the car (10) movement. A control mechanism (11) reacts to responsive to the stop pulley (41) movement to apply the brakes (12, 13).

Description

La présente invention concerne un système de freinage automatique d'une cabine d'ascenseur prévu pour la stopper lorsque celle-ci atteint ou dépasse une vitesse limite de déplacement à l'intérieur d'une gaine d'ascenseur.The present invention relates to an automatic braking system of a elevator car designed to stop it when it reaches or exceeds a speed displacement limit inside an elevator shaft.

On connaít déjà de tels systèmes de freinage automatiques qui consistent généralement en un mécanisme d'arrêt comprenant une poulie d'arrêt prévue pour être entraínée en rotation en même temps que ladite cabine se déplace. Ladite poulie d'arrêt est prévue pour tourner librement lorsque sa vitesse de rotation est inférieure à une vitesse de rotation seuil et se bloquer lorsque sa vitesse de rotation est égale ou supérieure à ladite vitesse de rotation seuil. Ils comprennent encore un mécanisme pour commander l'action desdits freins lorsque ladite poulie d'arrêt est bloquée.We already know such automatic braking systems which consist generally in a stop mechanism comprising a stop pulley intended to be rotated at the same time as said cabin moves. Said stop pulley is designed to rotate freely when its rotation speed is less than one threshold speed and lock when its speed is equal or higher than said threshold speed of rotation. They still include a mechanism to control the action of said brakes when said stop pulley is blocked.

On a représenté à la Fig. 1 une installation d'ascenseur qui est équipée d'un système de freinage selon l'état de la technique connu. Cette installation est essentiellement constituée d'une cabine d'ascenseur 10 qui est mue entre les différents étages d'une gaine d'ascenseur (non représentée), par exemple au moyen d'une machinerie 20 agissant sur un câble ou un faisceau de câbles de traction 21 et comportant un contrepoids 22. La cabine d'ascenseur 10 est guidée dans son mouvement par des rails latéraux s'étendant verticalement dans la gaine d'ascenseur et sur lesquels la cabine 10 s'appuie par l'intermédiaire de guides 31. Par souci de clarté, on n'a représenté qu'un seul de ces rails 30 à la Fig. 1.There is shown in FIG. 1 an elevator installation which is equipped with a braking system according to the known state of the art. This installation is essentially consisting of an elevator car 10 which is moved between the different floors of an elevator shaft (not shown), for example by means of a machinery 20 acting on a cable or a bundle of traction cables 21 and comprising a counterweight 22. The elevator car 10 is guided in its movement by side rails extending vertically in the elevator shaft and on which the cabin 10 is supported by guides 31. For the sake of clarity, only one of these rails 30 has been shown in FIG. 1.

La cabine d'ascenseur 10 comporte un mécanisme de commande 11 prévu pour commander l'action des freins 12 et 13 représentés ici schématiquement sous la forme de simples coins. Les freins 12 et 13 agissent généralement sur les rails 30 de la cabine d'ascenseur 10. Ces freins 12 et 13 sont également connus dans le domaine de la technique sous le nom de "pince parachute". Ils agissent l'un dans un sens de déplacement de la cabine 10, l'autre dans l'autre sens.The elevator car 10 has a control mechanism 11 provided for control the action of the brakes 12 and 13 shown here schematically in the form simple corners. The brakes 12 and 13 generally act on the rails 30 of the elevator car 10. These brakes 12 and 13 are also known in the field of the technique under the name of "parachute clip". They act one in a sense of movement of the cabin 10, the other in the other direction.

Quant au système de freinage automatique, il comporte une poulie d'arrêt 50 qui est montée sur la maçonnerie en partie supérieure de la gaine d'ascenseur et un câble sans fin 60 enroulé entre la poulie d'arrêt 50 et une poulie de renvoi 51. Le câble sans fin 60 est tendu au moyen d'une masse de tension 52 sollicitant la poulie de renvoi 51.As for the automatic braking system, it includes a stop pulley 50 which is mounted on the masonry in the upper part of the elevator shaft and a cable endless 60 wound between the stop pulley 50 and a return pulley 51. The cable without end 60 is tensioned by means of a tension mass 52 urging the return pulley 51.

Un mécanisme de commande 53 est, d'une part, fixé sur le câble sans fin 60 et, d'autre part, sur la cabine 53. En fonctionnement normal, c'est-à-dire lorsque la vitesse de déplacement de la cabine 10 est inférieure à une vitesse limite, la cabine 10 entraíne le câble 60. Le mécanisme 53 n'est pas sollicité et n'agit donc pas sur le mécanisme de commande 11 des freins 12 et 13.A control mechanism 53 is, on the one hand, fixed on the endless cable 60 and, on the other hand, on the cabin 53. In normal operation, that is to say when the speed movement of cabin 10 is less than a speed limit, cabin 10 drives the cable 60. The mechanism 53 is not stressed and therefore does not act on the control mechanism 11 for brakes 12 and 13.

Par contre, lorsque la vitesse de la cabine 10 atteint ou dépasse une vitesse limite, la poulie d'arrêt 50 se bloque et le câble 60 est immobilisé. Le mécanisme 53 est sollicité car il est, d'un côté, immobilisé par le câble 60 et, de l'autre côté, solidaire de la cabine 10, laquelle se déplace encore. Cette sollicitation du mécanisme 53 a pour effet de commander le mécanisme de commande 11 qui agit alors sur les freins 12 et 13. Ceux-ci agissent à leur tour sur les rails 30, ce qui a pour effet d'immobiliser la cabine 10.On the other hand, when the speed of cabin 10 reaches or exceeds a speed limit, the stop pulley 50 is blocked and the cable 60 is immobilized. Mechanism 53 is stressed because it is, on one side, immobilized by the cable 60 and, on the other side, secured of cabin 10, which is still moving. This request of the mechanism 53 has for effect of controlling the control mechanism 11 which then acts on the brakes 12 and 13. These act in turn on the rails 30, which has the effect of immobilizing the cabin 10.

Un des inconvénients du système de freinage de l'état de la technique présenté ci-dessus est son encombrement relativement important du fait notamment de l'utilisation d'un câble sans fin, lequel comporte deux brins parallèles pour lesquels il est nécessaire de réserver de la place dans la gaine d'ascenseur.One of the disadvantages of the prior art braking system presented above is its relatively large size due in particular to the use of an endless cable, which has two parallel strands for which it it is necessary to reserve space in the elevator shaft.

Un autre inconvénient de ce système de freinage réside dans le fait que la poulie d'arrêt est nécessairement montée en partie haute de la gaine de l'ascenseur, généralement sur la même pièce de maçonnerie que celle sur laquelle repose le moteur d'entraínement 20. Les risques d'accident liés à cette pièce ne sont donc pas couverts par le système de freinage.Another disadvantage of this braking system is that the pulley stop is necessarily mounted in the upper part of the elevator shaft, generally on the same piece of masonry as the one on which the engine rests 20. The risk of accident linked to this part is therefore not covered by the braking system.

Le but de la présente invention est de proposer un système de freinage qui ne présente pas les inconvénients des systèmes de freinage de l'art antérieur, notamment ceux qui ont été exposés ci-dessus, et qui soit par conséquent d'un encombrement réduit par rapport à ceux de l'état de la technique et qui ne soit pas monté sur la même pièce de maçonnerie que celle sur laquelle repose le moteur d'entraínement.The object of the present invention is to propose a braking system which does not not have the disadvantages of braking systems of the prior art, in particular those which have been exposed above, and which is consequently of a clutter reduced compared to those of the prior art and which is not mounted on the same piece of masonry as that on which the drive motor rests.

Pour ce faire, selon une caractéristique de la présente invention, ledit mécanisme d'arrêt est monté sur ladite cabine, ledit mécanisme d'arrêt ou une partie de celui-ci étant prévus pour, en réaction au déplacement de ladite cabine lorsque ladite poulie d'arrêt est bloquée, se déplacer relativement à ladite cabine dans une direction sensiblement parallèle à la direction de ladite cabine. Ledit mécanisme de commande agit alors sur lesdits freins lorsque ledit mécanisme d'arrêt ou ladite partie de celui-ci se déplace relativement à ladite cabine.To do this, according to a characteristic of the present invention, said mechanism stop device is mounted on said cabin, said stop mechanism or a part thereof being provided for, in response to movement of said cabin when said pulley stop is blocked, move relative to said cabin in one direction substantially parallel to the direction of said cabin. Said control mechanism then acts on said brakes when said stop mechanism or said part thereof moves relative to said cabin.

Avantageusement, ladite poulie d'arrêt est entraínée par un câble de commande qui est suspendu verticalement dans la gaine d'ascenseur et qui passe dans sa gorge.Advantageously, said stop pulley is driven by a control cable which hangs vertically in the elevator shaft and goes down its throat.

Selon un premier mode de réalisation de la présente invention, ledit mécanisme d'arrêt comprend deux poulies dont l'une est ladite poulie d'arrêt, ledit câble de commande ayant son brin vertical supérieur qui passe dans la partie inférieure d'une première gorge d'une desdites poulies, passant ensuite dans la gorge de la seconde poulie puis repassant dans la partie supérieure de la seconde gorge de ladite première poulie.According to a first embodiment of the present invention, said mechanism stop comprises two pulleys, one of which is said stop pulley, said cable control having its upper vertical strand passing through the lower part of a first groove of one of said pulleys, then passing into the groove of the second pulley then ironing in the upper part of the second groove of said first pulley.

Ladite première poulie peut alors constituer la partie du mécanisme d'arrêt qui, en réaction au déplacement de ladite cabine lorsque ladite poulie d'arrêt est bloquée, se déplace relativement à ladite cabine.Said first pulley can then constitute the part of the stop mechanism which, in reaction to the movement of said cabin when said stop pulley is blocked, moves relative to said cabin.

Selon un second mode de réalisation de la présente invention, ledit mécanisme d'arrêt comprend au moins deux poulies dont l'une est ladite poulie d'arrêt, ledit câble de commande passant dans chacune desdites gorges desdites poulies.According to a second embodiment of the present invention, said mechanism stop comprises at least two pulleys, one of which is said stop pulley, said cable control passing through each of said grooves of said pulleys.

Ladite poulie amont et ladite poulie aval constituent la partie du mécanisme d'arrêt qui, en réaction au déplacement de ladite cabine lorsque ladite poulie d'arrêt est bloquée, se déplace relativement à ladite cabine.Said upstream pulley and said downstream pulley constitute the part of the mechanism which, in reaction to the movement of said cabin when said stop pulley is blocked, moves relative to said cabin.

Selon une autre caractéristique de la présente invention, ledit mécanisme d'arrêt ou ladite partie dudit mécanisme d'arrêt sont montés en bout d'un bras pivotant, ledit bras en s'écartant de sa position de repos sollicitant le mécanisme de commande qui agit alors sur lesdits freins.According to another characteristic of the present invention, said stop mechanism or said part of said stop mechanism are mounted at the end of a pivoting arm, said arm moving away from its rest position stressing the control mechanism which then acts on said brakes.

Selon une autre caractéristique de la présente invention, ledit mécanisme d'arrêt ou ladite partie dudit mécanisme d'arrêt sont montés sur des glissières s'étendant sensiblement dans la direction de déplacement de ladite cabine, ladite glissière en s'écartant de sa position de repos sollicitant le mécanisme de commande qui agit alors sur lesdits freins.According to another characteristic of the present invention, said stop mechanism or said part of said stop mechanism are mounted on slides extending substantially in the direction of movement of said cabin, said slide in deviating from its rest position stressing the control mechanism which then acts on said brakes.

Selon une autre caractéristique de la présente invention, ledit mécanisme d'arrêt ou ladite partie dudit mécanisme d'arrêt sont pourvus d'une tige escamotable qui peut, lorsqu'elle n'est pas escamotable, entrer en contact avec des butées prévues dans ladite gaine d'ascenseur, ce qui a pour effet de déplacer ledit mécanisme d'arrêt ou ladite partie dudit mécanisme d'arrêt relativement à ladite cabine et de solliciter ledit mécanisme de commande qui agit alors sur lesdits freins.According to another characteristic of the present invention, said stop mechanism or said part of said stop mechanism are provided with a retractable rod which can, when it is not retractable, come into contact with stops provided in said elevator shaft, which has the effect of displacing said stop mechanism or said part of said stop mechanism in relation to said cabin and to request said control mechanism which then acts on said brakes.

Les caractéristiques de l'invention mentionnées ci-dessus, ainsi que d'autres, apparaítront plus clairement à la lecture de la description suivante d'un exemple de réalisation, ladite description étant faite en relation avec les dessins joints, parmi lesquels :

  • La Fig. 1 est une vue schématique d'une installation d'ascenseur pourvue d'un système de freinage automatique selon l'état de la technique,
  • La Fig. 2 est une vue schématique d'une installation d'ascenseur pourvue d'un système de freinage automatique selon un premier mode de réalisation de la présente invention, ledit bras dit mécanisme d'arrêt se trouvant dans sa position de repos,
  • La Fig. 3 est une vue schématique d'une installation d'ascenseur pourvue d'un système de freinage automatique selon le premier mode de réalisation de la présente invention, ledit bras dit mécanisme d'arrêt se trouvant dans une position de travail,
  • La Fig. 4 est une vue schématique d'une installation d'ascenseur pourvue d'un système de freinage automatique selon le second mode de réalisation de la présente invention,
  • La Fig. 5 est une vue schématique d'une installation d'ascenseur pourvue d'un système de freinage automatique selon le troisième mode de réalisation de la présente invention,
  • La Fig. 6 est une vue schématique d'une installation d'ascenseur qui est identique à celle de la Fig. 2 et qui comporte en plus un dispositif de sécurité.
    • The characteristics of the invention mentioned above, as well as others, will appear more clearly on reading the following description of an exemplary embodiment, said description being made in relation to the accompanying drawings, among which:
  • Fig. 1 is a schematic view of an elevator installation provided with an automatic braking system according to the state of the art,
  • Fig. 2 is a schematic view of an elevator installation provided with an automatic braking system according to a first embodiment of the present invention, said arm known as the stop mechanism being in its rest position,
  • Fig. 3 is a schematic view of an elevator installation provided with an automatic braking system according to the first embodiment of the present invention, said arm known as the stop mechanism being in a working position,
  • Fig. 4 is a schematic view of an elevator installation provided with an automatic braking system according to the second embodiment of the present invention,
  • Fig. 5 is a schematic view of an elevator installation provided with an automatic braking system according to the third embodiment of the present invention,
  • Fig. 6 is a schematic view of an elevator installation which is identical to that of FIG. 2 and which additionally comprises a safety device.

    • L'installation d'ascenseur représentée à la Fig. 2 est essentiellement constituée d'une cabine d'ascenseur 10 qui est mue entre les différents étages d'une gaine d'ascenseur (non représentée), par exemple au moyen d'une machinerie 20 agissant sur un câble de traction ou un faisceau de câbles 21 et comportant un contrepoids 22. Cette machinerie 20 est par exemple montée sur la maçonnerie constituant la partie supérieure de la cabine d'ascenseur.The elevator installation shown in FIG. 2 is essentially constituted an elevator car 10 which is moved between the different floors of a shaft elevator (not shown), for example by means of machinery 20 acting on a traction cable or a bundle of cables 21 and comprising a counterweight 22. This machinery 20 is for example mounted on the masonry constituting the part upper part of the elevator car.

    La cabine d'ascenseur 10 est guidée dans son mouvement par des guides latéraux s'étendant verticalement dans la gaine d'ascenseur. Par souci de clarté, on n'a représenté qu'un seul de ces rails 30.The elevator car 10 is guided in its movement by guides side extending vertically in the elevator shaft. For the sake of clarity, we have shown only one of these rails 30.

    La cabine d'ascenseur 10 comporte un mécanisme de commande 11 (représenté schématiquement par un simple pointillé) prévu pour commander l'action de freins 12 et 13 représentés schématiquement à la Fig. 2 sous la forme de coins. Les freins 12 et 13 agissent sur les guides de la cabine d'ascenseur 10. Ces freins 12 et 13 sont également connus dans le domaine de la technique sous le nom de "pince parachute". Ils agissent l'un dans un sens de déplacement de la cabine 10, l'autre dans l'autre sens.The elevator car 10 has a control mechanism 11 (shown schematically by a simple dotted line) provided for controlling the action of the brakes 12 and 13 shown schematically in FIG. 2 in the form of corners. Brakes 12 and 13 act on the guides of the elevator car 10. These brakes 12 and 13 are also known in the technical field under the name of "parachute clamp". They act one in one direction of movement of the cabin 10, the other in the other direction.

    La cabine d'ascenseur 10 comporte un mécanisme d'arrêt 40 constitué ici d'une poulie d'arrêt 41 et d'une poulie de renvoi 42. La poulie d'arrêt 41 est du type qui tourne librement tant que sa vitesse de rotation ne dépasse pas une vitesse seuil, et qui se bloque lorsque sa vitesse de rotation dépasse ladite vitesse de rotation seuil.The elevator car 10 includes a stop mechanism 40 here consisting of a stop pulley 41 and a return pulley 42. The stop pulley 41 is of the type which rotates freely as long as its rotational speed does not exceed a threshold speed, and which freezes when its speed of rotation exceeds said threshold speed of rotation.

    On notera que dans l'exemple de réalisation représenté, le système 40 est monté sous la cabine 10, par exemple sur le châssis de celle-ci. Mais on comprendra, notamment par la suite, qu'il pourrait être monté, par exemple sur le même châssis, dans la partie haute de la cabine 10, ou ailleurs dès lors qu'il est solidaire de la cabine 10.It will be noted that in the embodiment shown, the system 40 is mounted under the cabin 10, for example on the chassis thereof. But we will understand, in particular thereafter, that it could be mounted, for example on the same chassis, in the upper part of the cabin 10, or elsewhere when it is integral with the cabin 10.

    Un câble de commande 60 qui s'étend verticalement dans la gaine d'ascenseur dans laquelle évolue ladite cabine d'ascenseur 10, passe dans la partie inférieure d'une première gorge de la poulie de renvoi 42, puis passe dans la gorge de la poulie d'arrêt 41 afin de pouvoir l'entraíner en rotation en même temps que se déplace la cabine 10 dans la gaine d'ascenseur, et enfin, dans la partie supérieure d'une seconde gorge de la poulie de renvoi 42. Son extrémité inférieure comporte un système de tension tel qu'une masse 61 (ou un ressort ou autre), alors que son extrémité supérieure est reliée au plafond de la gaine par l'intermédiaire d'un système élastique 62. La masse de tension 61 et le système élastique 62 sont prévus pour assurer la tension du câble de commande 60 A control cable 60 which extends vertically in the elevator shaft in which operates said elevator car 10, passes in the lower part of a first groove of the return pulley 42, then passes into the groove of the stop pulley 41 in order to be able to drive it in rotation at the same time as the cabin 10 moves in the elevator shaft, and finally, in the upper part of a second groove of the return pulley 42. Its lower end includes a tensioning system such that a mass 61 (or a spring or other), while its upper end is connected to the sheath ceiling by means of an elastic system 62. The mass of tension 61 and elastic system 62 are provided to ensure the tension of the cable order 60

    Dans l'exemple de réalisation représenté à la Fig. 2, la poulie de renvoi 42 est montée libre en rotation à l'extrémité libre d'un bras 43 prévu pour pivoter autour d'un axe de pivotement 44. Les poulies d'arrêt 41 et de renvoi 42 ont des axes de rotation parallèles entre eux et parallèles à l'axe de pivotement 44 du bras 43.In the embodiment shown in FIG. 2, the idler pulley 42 is free rotationally mounted at the free end of an arm 43 intended to pivot around a pivot axis 44. The stop pulleys 41 and return 42 have axes of rotation mutually parallel and parallel to the pivot axis 44 of the arm 43.

    Le bras 43 agit sur le mécanisme de commande 11 de la manière suivante. Lorsque le bras 43 est dans une position sensiblement horizontale, dite position de repos, comme celle qui est représentée à la Fig. 2, le mécanisme de commande 11 n'est pas sollicité et les freins 12 et 13 sont inactifs. Par contre, lorsqu'il prend une position inclinée, dite position de travail, dans un sens ou dans un autre, le mécanisme 11 est sollicité, ce qui a pour effet de rendre actifs les freins 12 et 13, stoppant ainsi la cabine 10 sur ses rails 30.The arm 43 acts on the control mechanism 11 in the following manner. When the arm 43 is in a substantially horizontal position, called the position of rest, like that shown in FIG. 2, the control mechanism 11 is not used and the brakes 12 and 13 are inactive. However, when he takes a tilted position, called working position, in one direction or another, the mechanism 11 is acted upon, which has the effect of activating the brakes 12 and 13, thereby stopping the cabin 10 on its rails 30.

    En fonctionnement normal, c'est-à-dire lorsque la cabine d'ascenseur 10 ne dépasse pas une vitesse limite, le câble 60 défile entre les poulies de renvoi 42 et d'arrêt 41 en entraínant notamment cette dernière. Le bras 43 se trouve alors dans sa position de repos, tel que cela est représenté à la Fig. 2. Il n'agit donc pas sur le mécanisme de commande 11, si bien que les freins 12 et 13 n'agissent pas sur les rails 30.In normal operation, i.e. when the elevator car 10 does not not exceed a speed limit, the cable 60 runs between the return pulleys 42 and stop 41, in particular involving the latter. The arm 43 is then in its rest position, as shown in FIG. 2. It therefore does not act on the control mechanism 11, so that the brakes 12 and 13 do not act on the rails 30.

    On notera que le bras 43 peut être contraint dans cette position de repos, par exemple au moyen d'éléments élastiques, tels que des ressorts (non représentés).It will be noted that the arm 43 can be constrained in this rest position, by example by means of elastic elements, such as springs (not shown).

    Lorsque la cabine d'ascenseur 10 atteint et dépasse une vitesse limite, la vitesse de rotation de la poulie d'arrêt 41 devient supérieure à sa vitesse de rotation seuil. Par conséquent, elle se bloque, rendant impossible le défilement du câble de commande 60 dans le mécanisme d'arrêt 40. La poulie de renvoi 42 se trouve alors immobilisée par rapport au câble de commande 60 et par rapport à la gaine (au déplacement près du câble 60 permis par les moyens élastiques 62). En réaction à l'avancement de la cabine 10 qui, par inertie, se déplace encore, le bras 43 pivote autour de son axe de pivotement 44. Il en résulte une action sur le mécanisme de commande 11, ce qui a pour effet de bloquer les freins 12 et 13 sur les rails 30. La cabine d'ascenseur 10 est alors stoppée.When the elevator car 10 reaches and exceeds a speed limit, the speed of rotation of the stop pulley 41 becomes greater than its threshold speed of rotation. Through therefore, it locks up, making it impossible to run the control cable 60 in the stop mechanism 40. The return pulley 42 is then immobilized relative to the control cable 60 and relative to the sheath (near displacement cable 60 allowed by elastic means 62). In response to the advancement of the cabin 10 which, by inertia, still moves, the arm 43 pivots around its axis of pivoting 44. This results in an action on the control mechanism 11, which has the effect of blocking the brakes 12 and 13 on the rails 30. The elevator car 10 is then stopped.

    Les poulies d'arrêt 41 et de renvoi 42 constituent ensemble un mécanisme d'arrêt 40 qui permet donc le défilement du câble de défilement 60 lorsque sa vitesse de défilement est inférieure à une vitesse limite, et qui bloque le câble de commande 60 lorsque cette vitesse limite est atteinte ou dépassée. Par ailleurs, le bras 43 constitue un moyen autorisant le déplacement du mécanisme d'arrêt 40 ou une partie de ce mécanisme 40 dans la direction d'avancement de la cabine 10 lorsque le câble de commande 60 est bloqué par la poulie d'arrêt 41, et que la cabine 10, par inertie, présente encore un mouvement.The stop and return pulleys 42 and together constitute a stop mechanism 40 which therefore allows the scrolling cable 60 to travel when its speed of scrolling is less than a speed limit, and which blocks the control cable 60 when this speed limit is reached or exceeded. Furthermore, the arm 43 constitutes means allowing the movement of the stop mechanism 40 or a part of it mechanism 40 in the direction of advancement of the cabin 10 when the cable control 60 is blocked by the stop pulley 41, and the cabin 10, by inertia, still exhibits movement.

    On comprendra que le mécanisme d'arrêt 40 pourrait comporter une pluralité de poulies (au moins deux) dont l'une serait une poulie d'arrêt 41, et au moins une autre serait montée de manière à pouvoir se déplacer dans la direction d'avancement de la cabine, par exemple à l'extrémité d'un bras tel que le bras 43..It will be understood that the stop mechanism 40 could include a plurality of pulleys (at least two), one of which would be a stop pulley 41, and at least one other would be mounted so that it could move in the direction of advancement of the cabin, for example at the end of an arm such as the arm 43 ..

    Avantageusement, ce sont la poulie amont (celle qui reçoit le brin vertical supérieur) et la poulie aval (celle qui renvoie le brin vertical inférieur) qui sont montées de manière à pouvoir se déplacer dans la direction d'avancement de la cabine 10.Advantageously, these are the upstream pulley (the one which receives the vertical strand upper) and the downstream pulley (the one that returns the lower vertical strand) which are mounted so that they can move in the direction of advancement of the cabin 10.

    Aux Figs. 2 et 3, la poulie de renvoi 42 est une poulie à deux gorges prévue, d'une part, pour recevoir le brin vertical supérieur du câble 60 et le renvoyer sur la poulie d'arrêt 41 et, d'autre part, pour recevoir le brin issu de la poulie d'arrêt 41 et pour le renvoyer en tant que brin vertical inférieur.In Figs. 2 and 3, the return pulley 42 is a pulley with two grooves provided, on the one hand, to receive the upper vertical strand of cable 60 and return it to the stop pulley 41 and, on the other hand, to receive the strand coming from the stop pulley 41 and to return it as a lower vertical strand.

    A la Fig. 4, on a représenté une variante de réalisation où le bras 43 représenté aux Figs. 1 et 2 est remplacé par une glissière 46 parallèle à la direction d'avancement de la cabine 10 dans laquelle l'axe de rotation 47 de la poulie de renvoi 42 peut se déplacer lorsque le câble de commande 60 est bloqué dans la poulie d'arrêt 41. A la Fig. 4, la poulie de renvoi 42 est représentée dans sa position de repos dans laquelle l'axe de rotation est sensiblement au centre de la glissière 46. Le mécanisme 11 est sollicité lorsque l'axe 47 n'est plus dans sa position centrale de repos, mais en est écarté.In Fig. 4, an alternative embodiment is shown where the arm 43 shown in Figs. 1 and 2 is replaced by a slide 46 parallel to the direction of advance of the cabin 10 in which the axis of rotation 47 of the deflection pulley 42 can be move when the control cable 60 is blocked in the stop pulley 41. At the Fig. 4, the return pulley 42 is shown in its rest position in which the axis of rotation is substantially at the center of the slide 46. The mechanism 11 is stressed when axis 47 is no longer in its central rest position, but is discarded.

    La Fig. 5 est une variante de réalisation qui comporte deux poulies de renvoi 42a et 42b qui sont montées libres en rotation aux extrémités d'un coulisseau 48 prévu pour pouvoir se déplacer en translation dans une direction parallèle à la direction de déplacement de la cabine d'ascenseur 10. Le coulisseau 48 est pour ce faire monté dans une glissière 49 s'étendant verticalement dans la direction d'avancement de la cabine 10. Le coulisseau 48 est ici montré dans sa position de repos.Fig. 5 is an alternative embodiment which comprises two pulleys 42a and 42b which are mounted to rotate freely at the ends of a slider 48 provided to be able to move in translation in a direction parallel to the direction of movement of the elevator car 10. The slide 48 is mounted for this purpose in a slide 49 extending vertically in the direction of advancement of the cabin 10. The slide 48 is here shown in its rest position.

    On notera que les modes de réalisation représentés sont prévus pour déclencher l'action des freins 12 et 13 lorsque la cabine 10 atteint ou dépasse une vitesse limite fixée par la poulie d'arrêt 41, et ce, quel que soit le sens de déplacement de la cabine 10. Note that the embodiments shown are intended to trigger the action of the brakes 12 and 13 when the cabin 10 reaches or exceeds a speed limit fixed by the stop pulley 41, regardless of the direction of movement of the cabin 10.

    On aura compris que dans tous les exemples représentés, la poulie d'arrêt 41 pourrait être mise à la place d'une poulie de renvoi 42, 42a ou 42b, et qu'elle serait alors remplacée par une poulie de renvoi.It will be understood that in all the examples shown, the stop pulley 41 could be put in place of a deflection pulley 42, 42a or 42b, and that it would then replaced by a deflection pulley.

    A la Fig. 6, on a représenté une installation d'ascenseur qui est identique à celle déjà représentée à la Fig. 2 et qui comporte en plus un dispositif de sécurité 90. Ce dispositif de sécurité 90 est constitué essentiellement d'une tige 91 qui est rétractable sous l'action d'un dispositif de pilotage tel qu'un électroaimant 92, lequel est monté sur le bras pivotant 43. A la Fig. 6, la position rétractable de la tige 91 est représentée en traits forts, alors que sa position sortie est représentée en pointillés.In Fig. 6, there is shown an elevator installation which is identical to that already shown in FIG. 2 and which additionally comprises a safety device 90. This safety device 90 consists essentially of a rod 91 which is retractable under the action of a control device such as an electromagnet 92, which is mounted on the pivoting arm 43. In FIG. 6, the retractable position of the rod 91 is shown in strong lines, while its extended position is shown in dotted lines.

    Quand la tige 91 est en position non escamotée, elle peut entrer en contact avec une ou plusieurs butées 93 qui sont prévues dans la gaine de l'ascenseur. Par contre, en position escamotée, elle ne peut pas entrer en contact avec ces butées 93.When the rod 91 is in the not retracted position, it can come into contact with one or more stops 93 which are provided in the elevator shaft. However, in retracted position, it cannot come into contact with these stops 93.

    Lorsque la tige 91 entre en contact avec une butée 93 par réaction à l'avancement de la cabine 10, le bras 43 pivote selon son axe, ce qui a pour effet d'agir sur le mécanisme de commande 11 et d'actionner les freins 12 et 13. La cabine s'immobilise alors.When the rod 91 comes into contact with a stop 93 by reaction to advancement of the cabin 10, the arm 43 pivots along its axis, which has the effect of acting on the control mechanism 11 and apply the brakes 12 and 13. The cabin then stops.

    Claims (8)

    1. Automatic braking system for a lift car (10) provided in order to stop same when it reaches or exceeds a maximum speed of movement inside a lift shaft, said system being constituted, on the one hand by a stopping mechanism (40) mounted on said car (10), and comprising a stopping pulley (41) driven by a control cable (60) which is suspended vertically in the lift shaft and which passes in its groove in such a manner as to be driven in rotation at the same time as said car (10) moves, said stopping pulley (41) being provided in order to turn freely when its speed of rotation is lower than a threshold speed of rotation and locking when its speed of rotation is equal to or higher than said threshold speed of rotation and, on the other hand, by a mechanism (11) in order to control the action of said brakes (12, 13) when said stopping pulley (41) is locked, characterized in that said stopping mechanism (40) is provided in order, in reaction to the movement of said car (10) when said stopping pulley (41) is locked, to move relative to said car in a direction approximately parallel to the direction of the movement of said car (10), and in that said control mechanism (11) acts on said brakes (12, 13) when said stopping mechanism (41) or said part of same moves relative to said car (10).
    2. Braking system according to claim 1, characterized in that said stopping mechanism (40) comprises two pulleys (41, 42) one of which is said stopping pulley (41), said control cable (60) having its upper vertical end which passes in the lower part of a first groove of one of said pulleys (42), then passing in the groove of the second pulley (41) then returning in the upper part of the second groove of said first pulley (42).
    3. Braking system according to claim 2, characterized in that said first pulley (41) constitutes the part of the stopping mechanism (40) which, in reaction to the movement of said car (10) when said stopping pulley is locked, moves relative to said car (10).
    4. Braking system according to claim 1, characterized in that said stopping mechanism (40) comprises at least two pulleys (41, 42; 42a, 42b) one of which is said stopping pulley (41), said control cable (60) passing in each of the grooves of said pulleys.
    5. Braking system according to claim 4, characterized in that said upstream pulley (42a) and said downstream pulley (42b) constitute the part of the stopping mechanism (40) which moves in a direction approximately parallel to the direction of said car (10).
    6. Braking system according to one of the preceding claims, characterized in that said stopping mechanism (40) or said part of said stopping mechanism are mounted at the end of a pivoting arm (43), said arm (43), by moving away from its resting position pulling the control mechanism (11) which then acts on said brakes (12,13).
    7. Braking system according to one of claims 1 to 5, characterized in that said stopping mechanism (40) or said part of said stopping mechanism are mounted on guide rails (46, 49) extending approximately in the direction of movement of said car (10), said guide rail (46, 49), by moving away from its resting position pulling the control mechanism (11) which then acts on said brakes (12,13).
    8. Braking system according to one of the preceding claims, characterized in that said stopping mechanism (40) or said part of said stopping mechanism are provided with a retractable rod (91), which can, when it is not retracted, come into contact with at least one stop (93) provided in said lift shaft, which has the effect of moving said stopping mechanism (40) or said part of said stopping mechanism relative to said car (10) and pulling said control mechanism (11) which then acts on said brakes (12, 13).
    EP00925371A 1999-05-04 2000-05-03 Automatic braking system of a lift cage Expired - Lifetime EP1175367B1 (en)

    Applications Claiming Priority (3)

    Application Number Priority Date Filing Date Title
    FR9905890 1999-05-04
    FR9905890A FR2793230B1 (en) 1999-05-04 1999-05-04 AUTOMATIC BRAKING SYSTEM OF AN ELEVATOR CAB
    PCT/FR2000/001180 WO2000066475A1 (en) 1999-05-04 2000-05-03 Automatic braking system of a lift cage

    Publications (2)

    Publication Number Publication Date
    EP1175367A1 EP1175367A1 (en) 2002-01-30
    EP1175367B1 true EP1175367B1 (en) 2003-07-16

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    EP00925371A Expired - Lifetime EP1175367B1 (en) 1999-05-04 2000-05-03 Automatic braking system of a lift cage

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    US (1) US6202795B1 (en)
    EP (1) EP1175367B1 (en)
    AT (1) ATE245120T1 (en)
    CZ (1) CZ295395B6 (en)
    DE (1) DE60003910T2 (en)
    ES (1) ES2199824T3 (en)
    FR (1) FR2793230B1 (en)
    PL (1) PL351430A1 (en)
    PT (1) PT1175367E (en)
    WO (1) WO2000066475A1 (en)

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    CN105712148A (en) * 2016-03-23 2016-06-29 安徽瑞格电梯服务股份有限公司 Emergent stopping device of car

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    CN105712148A (en) * 2016-03-23 2016-06-29 安徽瑞格电梯服务股份有限公司 Emergent stopping device of car
    CN105712148B (en) * 2016-03-23 2018-05-25 安徽瑞格电梯服务股份有限公司 A kind of car emergency stop equipment

    Also Published As

    Publication number Publication date
    WO2000066475A1 (en) 2000-11-09
    FR2793230B1 (en) 2001-07-06
    ATE245120T1 (en) 2003-08-15
    ES2199824T3 (en) 2004-03-01
    PL351430A1 (en) 2003-04-22
    DE60003910D1 (en) 2003-08-21
    FR2793230A1 (en) 2000-11-10
    CZ20013905A3 (en) 2003-04-16
    DE60003910T2 (en) 2004-05-27
    US6202795B1 (en) 2001-03-20
    EP1175367A1 (en) 2002-01-30
    CZ295395B6 (en) 2005-07-13
    PT1175367E (en) 2003-10-31

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