EP0582528A1 - Checking the clamping pressure of a detachable grip of a ropeway - Google Patents

Checking the clamping pressure of a detachable grip of a ropeway Download PDF

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Publication number
EP0582528A1
EP0582528A1 EP93420325A EP93420325A EP0582528A1 EP 0582528 A1 EP0582528 A1 EP 0582528A1 EP 93420325 A EP93420325 A EP 93420325A EP 93420325 A EP93420325 A EP 93420325A EP 0582528 A1 EP0582528 A1 EP 0582528A1
Authority
EP
European Patent Office
Prior art keywords
clamp
ramp
cable
control member
closing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP93420325A
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German (de)
French (fr)
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EP0582528B1 (en
Inventor
Jean Souchal
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Poma SA
Original Assignee
Pomagalski SA
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Filing date
Publication date
Application filed by Pomagalski SA filed Critical Pomagalski SA
Publication of EP0582528A1 publication Critical patent/EP0582528A1/en
Application granted granted Critical
Publication of EP0582528B1 publication Critical patent/EP0582528B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
    • B61B12/00—Component parts, details or accessories not provided for in groups B61B7/00 - B61B11/00
    • B61B12/12—Cable grippers; Haulage clips
    • B61B12/122—Cable grippers; Haulage clips for aerial ropeways
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
    • B61B12/00—Component parts, details or accessories not provided for in groups B61B7/00 - B61B11/00
    • B61B12/06—Safety devices or measures against cable fracture

Definitions

  • a known installation of the kind mentioned is equipped with a control ramp which exerts on the clamp control member, closed on the cable, a predetermined elastic force just lower than the normal force of opening of the clamp.
  • the movement of the control lever under the action of this lower force indicates a failure of the clamp closing spring, but the reverse is not ensured. Failure to move the control lever may result from seizure or any other incident and this check is not of absolute safety.
  • This control is also of the all or nothing type and does not allow monitoring of the development of the state of the clamp.
  • the present invention aims to allow the realization of a device for almost direct measurement of the clamping force of the clamp at each outlet of the clamp from a station and without stopping or slowing down the clamp.
  • control means comprises a device for continuous measurement of the action exerted by the control member on the ramp and a detector of the moment of closing of the clamp on the cable to carry out a measurement of said action at this instant.
  • the action on the ramp is generated by the force of the closing spring which keeps the lever in support of the ramp and it is understood that this action is equivalent to the force of the spring reduced by friction and possibly affected by a multiplication factor due to levers.
  • a measurement of the action therefore constitutes a safe weighted measurement of the force of the spring.
  • the invention is advantageously applied to a clamp of the type described in French patent N ° 2497750, in which the movable jaw is pivotally mounted and is carried by one end of the actuation lever, the other end of which carries the member. and is directly attacked by the clamp closing spring.
  • This direct connection by the actuating lever between the spring, the control member and the movable jaw ensures perfect equivalence between said action, just before the clamp is closed and the clamping force exerted on the cable by the jaw at closing time.
  • the action on the ramp is transferred to the cable and the control member leaves the ramp.
  • the clamp rolls on a rail, which diverges with the control ramp so as to allow the spring to relax during the advancement of the clamp and a clamp closure.
  • the measurement area is limited to the ramp section corresponding to the closing of the clamp and the length of this section is sufficient to take into account the wear of the clamps and of the cable and the manufacturing tolerances.
  • the transfer of the force from the ramp to the cable can be detected by the separation of the control member and the ramp, in particular by providing a conductive track on the ramp, in electrical contact with the control member, the separation of which interrupts the circuit.
  • the measurement adopted is that which precedes the interruption of the electrical circuit.
  • the transfer of force can be detected by other means, for example by immobilizing the control lever or by analyzing the variation of the measurement signal.
  • the measurement is advantageously carried out by supporting the measurement section of the ramp by load cells or by a balance, but other means are conceivable.
  • the device is particularly simple and is applicable to standard pliers without any adaptation. It is intrinsically safe and its simplicity gives it great reliability.
  • a cable 10 of a single-cable air transport installation in particular of a chairlift or a gondola, is driven continuously.
  • the loads in this case the seats or the cabins, are fixed to the cable 10 in line by clamps 11 of the disengageable type to allow opening of the clamp in the stations and boarding or disembarking at a standstill or at reduced speed, passengers in seats or cabins.
  • the seats or cabins are re-accelerated and re-coupled by closing the clamp on the cable 10
  • the clamp 11 shown in Figure 1 has an elongated body 12 on which is articulated the end of a hanger 13 carrying the load (not shown).
  • the body 12 also carries rollers 14 for rolling on support rails 15 in the stations.
  • One of the ends of the body 12 is shaped as a fixed jaw 16, which cooperates with a movable jaw 17, articulated on the fixed jaw 16 and integral with the end of a control lever 18.
  • the opposite end 19 of the lever 18 carries an axis 21 of articulation of a control roller 20 and an axis 22 of anchoring of a coil compression spring 23.
  • the opposite end of the spring 23 is supported on a cup 24 secured to the body 12 by tie rods 25.
  • a friction plate 27 is fixed on the body 12 to cooperate with friction wheels 28, which drive the clamp 11 uncoupled from cable 10 in stations.
  • Such pliers are well known and it suffices to recall that the spring 23 biases the lever 18 anticlockwise, in FIG. 1, in the clamping direction of the jaws 16, 17 on the cable 10.
  • L opening of the clamp 11 is controlled by a downward movement of the roller 20 against the force of the spring 23. This control results from a passage of the clamp 11 under a control ramp 26 which engages the roller 20
  • the ramps 26 are arranged on the one hand at the entrance to the station. for uncoupling the clamp 11, rolling on the rail 15, from the cable 10 and on the other hand at the outlet for re-coupling the clamp 11 to the cable 10.
  • FIGS. 2 and 3 which illustrate a zone for clutching the clamp 11 at the outlet of the station
  • the clamp 11 rolling on the rail 15 while being driven by the friction wheels 28, engages by its roller 20 the entry of the ramp 26 in the position 6.
  • the clamp 11 is still closed, but continuing its travel in the direction indicated by the arrow in the figure the roller 20 is moved downwards by the action of the ramp 26 which approaches the rail 15.
  • position 7 the clamp 11 is open and the cable 10 engages between the jaws 16,17 open.
  • At this position 7 corresponds an inversion of slope of the ramp 26, which progressively deviates from the rail 15 allowing a rise of the roller 20 and a closing of the clamp 11 under the action of the spring 23.
  • the section 30 of the ramp 26, which extends along the closing area of the clamp 11, is mechanically separated from the other fixed part of the ramp and is carried by load cells 31 measuring the force or the action exerted by the roller 20 on the section 30. It is clear that the whole of the ramp 26 can be arranged for such a measurement and that this can be carried out by other means, in particular a simple balance . In the example illustrated in FIG. 5, the section 30 is mounted to slide upwards, other arrangements being possible.
  • the roller 20 is disposed in line with the spring 23 and that when the roller 20 is in support of the section 30 the force of the spring 20 is directly transmitted to the section 30 with the closest friction, which can be summed up moreover to those of the lever joint 18.
  • the roller 20 leaves the section 30 and all the force of the spring 23 is transferred to the jaws 16.17, well heard multiplied in a constant ratio by the lever 18. It is understood that the clamping force of the jaws 16.17 on the cable 10 corresponds exactly to that exerted on the section 30 at the time of separation of the roller 20 from the section 30 with a given weighting factor
  • the instant of separation of the roller 20 and the section 30 can be deduced from the curve, represented in FIG. 4, from the action exerted on the ramp 26 and more particularly from the point 32 of abrupt variation towards the zero value.
  • a microprocessor or any other automatic device detects this variation as well as the measurement preceding this variation to provide an exact indication of the clamping force of the clamp 11.
  • the mechanical separation causes an interruption of the electrical contact that is easily detectable and usable to initiate the measurement and possibly an alarm and a shutdown of the installation.
  • the invention is applicable to other types of clamps, in particular to two stable positions, the clamp remaining open in the station.
  • the ramp has only one closing section associated with an unlocking system, which does not affect the measuring device.
  • the relationship between the spring force and the cable clamping force is not affected by a more sophisticated lever system.
  • the measuring device is integrated into the clamp control ramp and does not increase the size of the station. It can easily be added to existing installations, without any modification of the clamps and can be improved to monitor the evolution of the spring force and therefore the state of the clamp.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Flexible Shafts (AREA)
  • Force Measurement Appropriate To Specific Purposes (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Labeling Devices (AREA)
  • Casting Devices For Molds (AREA)
  • Installation Of Indoor Wiring (AREA)
  • Insulated Conductors (AREA)

Abstract

A chair lift or a cable car having detachable grips (11) is equipped with a device for measuring the clamping force on the cable (10) by the jaws of the grip under the action of a closing spring. The closing control ramp, which actuates the control lever of the grip, comprises a measuring portion (30) carried by load cells (31). By measuring the force or action exerted on this portion at the moment of clamping of the grip, a weighted measurement of the clamping force is obtained. <IMAGE>

Description

L'invention est relative à une installation de transport à câble aérien porteur-tracteur défilant en continu, notamment une télécabine ou un télésiège comprenant ;

  • des pinces débrayables d'accouplement de charges au câble, chaque pince ayant un levier d'actionnement pour l'ouverture et la fermeture de la pince, un ressort sollicitant ledit levier en position de fermeture de la pince et fournissant la force de serrage de la pince sur le câble et un organe de commande porté par ledit levier,
  • une rampe de commande s'étendant le long de la trajectoire de défilement de la pince, à la sortie d'une station pour commander la fermeture de la pince et son embrayage sur le câble, ladite rampe coopérant avec ledit organe de commande au passage de la pince,
  • et un moyen de contrôle du serrage de la pince.
The invention relates to a transport installation using an overhead cable-tractor traveling continuously, in particular a cable car or chairlift comprising;
  • disengageable clamps for coupling loads to the cable, each clamp having an actuating lever for opening and closing the clamp, a spring urging said lever in the closed position of the clamp and providing the clamping force of the clamp on the cable and a control member carried by said lever,
  • a control ramp extending along the path of travel of the clamp, at the exit of a station for controlling the closing of the clamp and its clutch on the cable, said ramp cooperating with said control member in the passage of the pliers,
  • and a means of controlling the clamping of the clamp.

Une installation connue du genre mentionné, est équipée d'une rampe de contrôle qui exerce sur l'organe de commande de la pince, fermée sur le câble, une force élastique prédéterminée juste inférieure à la force normale d'ouverture de la pince. Le déplacement du levier de commande sous l'action de cette force inférieure traduit une défaillance du ressort de fermeture de la pince, mais la réciproque n'est pas assurée. Le non-déplacement du levier de commande peut résulter d'un grippage ou de tout autre incident et ce contrôle n'est pas d'une sécurité absolue. Ce contrôle est de plus du type tout ou rien et ne permet pas une surveillance de l'évolution de l'état de la pince.A known installation of the kind mentioned, is equipped with a control ramp which exerts on the clamp control member, closed on the cable, a predetermined elastic force just lower than the normal force of opening of the clamp. The movement of the control lever under the action of this lower force indicates a failure of the clamp closing spring, but the reverse is not ensured. Failure to move the control lever may result from seizure or any other incident and this check is not of absolute safety. This control is also of the all or nothing type and does not allow monitoring of the development of the state of the clamp.

La présente invention a pour but de permettre la réalisation d'un dispositif de mesure quasi-directe de la force de serrage de la pince à chaque sortie de la pince d'une station et sans arret ou ralentissement de la pince.The present invention aims to allow the realization of a device for almost direct measurement of the clamping force of the clamp at each outlet of the clamp from a station and without stopping or slowing down the clamp.

L'installation selon l'invention est caractérisée en ce que le moyen de contrôle comporte un dispositif de mesure continue de l'action exercée par l'organe de commande sur la rampe et un détecteur de l'instant de fermeture de la pince sur le câble pour réaliser une mesure de ladite action à cet instant.The installation according to the invention is characterized in that the control means comprises a device for continuous measurement of the action exerted by the control member on the ramp and a detector of the moment of closing of the clamp on the cable to carry out a measurement of said action at this instant.

L'action sur la rampe est engendrée par la force du ressort de fermeture qui maintient le levier en appui de la rampe et on comprend que cette action équivaut à la force du ressort diminuée des frottements et éventuellement affectée d'un facteur de multiplication dû à des leviers. Une mesure de l'action constitue donc une mesure sûre pondérée de la force du ressort.The action on the ramp is generated by the force of the closing spring which keeps the lever in support of the ramp and it is understood that this action is equivalent to the force of the spring reduced by friction and possibly affected by a multiplication factor due to levers. A measurement of the action therefore constitutes a safe weighted measurement of the force of the spring.

L'invention est avantageusement appliquée à une pince du type décrit dans le brevet français N°2497750 , dans laquelle le mors mobile est monté à pivotement et est porté par une extrémité du levier d'actionnement, dont l'autre extrémité porte l'organe de commande et est directement attaquée par le ressort de fermeture de la pince. Cette liaison directe par le levier d'actionnement entre le ressort, l'organe de commande et le mors mobile assure une équivalence parfaite entre ladite action, juste avant la fermeture de la pince et la force de serrage exercée sur le câble par le mors au moment de la fermeture. Dès cette fermeture l'action sur la rampe est transférée sur le câble et l'organe de commande quitte la rampe. Dans la zone d'accouplement de la pince au câble et de mesure de la force de serrage, la pince roule sur un rail, qui diverge avec la rampe de commande de façon à autoriser une détente du ressort au cours de l'avancement de la pince et une fermeture de la pince.The invention is advantageously applied to a clamp of the type described in French patent N ° 2497750, in which the movable jaw is pivotally mounted and is carried by one end of the actuation lever, the other end of which carries the member. and is directly attacked by the clamp closing spring. This direct connection by the actuating lever between the spring, the control member and the movable jaw ensures perfect equivalence between said action, just before the clamp is closed and the clamping force exerted on the cable by the jaw at closing time. As soon as this is closed, the action on the ramp is transferred to the cable and the control member leaves the ramp. In the area of coupling the clamp to the cable and measuring the clamping force, the clamp rolls on a rail, which diverges with the control ramp so as to allow the spring to relax during the advancement of the clamp and a clamp closure.

La zone de mesure est limitée au tronçon de rampe correspondant à la fermeture de la pince et la longueur de ce tronçon est suffisante pour tenir compte de l'usure des pinces et du câble et des tolérances de fabrication. Le transfert de la force de la rampe vers le câble peut être détecté par la séparation de l'organe de commande et de la rampe, notamment en prévoyant une piste conductrice sur la rampe, en contact électrique avec l'organe de commande dont la séparation interrompt le circuit. La mesure retenue est celle qui précède l'interruption du circuit électrique. Le transfert de la force peut être détecté par d'autres moyens, par exemple par l'immobilisation du levier de commande ou par analyse de la variation du signal de mesure. Pendant la course de fermeture de la pince l'action sur la rampe décroît régulièrement, dû à une détente progressive du ressort et cette action passe brusquement à zéro lors de la fermeture de la pince et de la séparation de l'organe de commande de la rampe. Un enregistrement de la mesure de cette action montre la variation brusque et on retient la valeur qui précède cette variation. Cette analyse peut bien entendu être automatisée pour disposer à chaque passage d'une pince de l'indication de la force de serrage, qui est soit affichée ou utilisée pour commander l'arrêt de l'installation si elle est insuffisante.The measurement area is limited to the ramp section corresponding to the closing of the clamp and the length of this section is sufficient to take into account the wear of the clamps and of the cable and the manufacturing tolerances. The transfer of the force from the ramp to the cable can be detected by the separation of the control member and the ramp, in particular by providing a conductive track on the ramp, in electrical contact with the control member, the separation of which interrupts the circuit. The measurement adopted is that which precedes the interruption of the electrical circuit. The transfer of force can be detected by other means, for example by immobilizing the control lever or by analyzing the variation of the measurement signal. During the closing stroke of the clamp, the action on the ramp decreases regularly, due to a progressive relaxation of the spring, and this action suddenly drops to zero when the clamp is closed and the control member is separated from the ramp. A recording of the measurement of this action shows the sudden variation and the value preceding this variation is retained. This analysis can of course be automated so as to have, at each pass, a clamp with the indication of the clamping force, which is either displayed or used to control the stopping of the installation if it is insufficient.

La mesure est avantageusement réalisée en supportant le tronçon de mesure de la rampe par des pesons ou par une balance, mais d'autres moyens sont concevables. Le dispositif est particulièrement simple et il est applicable aux pinces standard sans aucune adaptation. Il est intrinsèquement sûr et sa simplicité lui confère une grande fiabilité.The measurement is advantageously carried out by supporting the measurement section of the ramp by load cells or by a balance, but other means are conceivable. The device is particularly simple and is applicable to standard pliers without any adaptation. It is intrinsically safe and its simplicity gives it great reliability.

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

  • la figure 1 est une vue schématique en élévation et en coupe d'une pince d'une installation selon l'invention;
  • les figures 2 et 3 sont des vues schématiques en élévation et en plan de la zone d'embrayage et de mesure;
  • la figure 4 illustre la variation de l'action sur la rampe selon la position de la pince;
  • la figure 5 est une vue de détail à échelle agrandie de la figure 2;
  • les figures 6,7,8 et 9 sont des vues analogues à celle de la figure 1 montrant la pince dans les positions successives repérées en 6,7,8 et 9 sur la figure 2.
Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment of the invention given by way of nonlimiting example and represented in the appended drawings, in which:
  • Figure 1 is a schematic elevational view in section of a clamp of an installation according to the invention;
  • Figures 2 and 3 are schematic elevational and plan views of the clutch and measurement area;
  • FIG. 4 illustrates the variation of the action on the ramp according to the position of the clamp;
  • Figure 5 is an enlarged detail view of Figure 2;
  • Figures 6,7,8 and 9 are views similar to that of Figure 1 showing the clamp in the successive positions identified in 6,7,8 and 9 in Figure 2.

Sur les figures, un câble 10 d'une installation de transport aérien monocâble, notamment d'un télésiège ou d'une télécabine, est entraîné à défilement continu. Les charges en l'occurrence les sièges ou les cabines, sont fixés au câble 10 en ligne par des pinces 11 du type débrayable pour permettre une ouverture de la pince dans les stations et un embarquement ou débarquement à l'arrêt ou à vitesse réduite, des passagers des sièges ou des cabines. A la sortie de la station les sièges ou cabines sont réaccélérés et réaccouplés par fermeture de la pince sur le câble 10In the figures, a cable 10 of a single-cable air transport installation, in particular of a chairlift or a gondola, is driven continuously. The loads, in this case the seats or the cabins, are fixed to the cable 10 in line by clamps 11 of the disengageable type to allow opening of the clamp in the stations and boarding or disembarking at a standstill or at reduced speed, passengers in seats or cabins. On leaving the station, the seats or cabins are re-accelerated and re-coupled by closing the clamp on the cable 10

La pince 11 représentée à la figure 1, comporte un corps allongé 12 sur lequel est articulée l'extrémité d'une suspente 13 portant la charge (non représentée). Le corps 12 porte de plus des galets 14 de roulement sur des rails de support 15 dans les stations. L'une des extrémités du corps 12 est conformée en mors fixe 16, qui coopère avec un mors mobile 17, articulé sur le mors fixe 16 et solidaire de l'extrémité d'un levier de commande 18. L'extrémité opposée 19 du levier 18 porte un axe 21 d'articulation d'un galet 20 de commande et un axe 22 d'ancrage d'un ressort 23 de compression à boudin. L'extrémité opposée du ressort 23 prend appui sur une coupelle 24 solidarisée au corps 12 par des tirants 25. Une plaque de friction 27 est fixée sur le corps 12 pour coopérer avec des roues de friction 28, qui assurent l'entraînement de la pince 11 désaccouplée du câble 10 dans les stations. Une telle pince est bien connue et il suffit de rappeler que le ressort 23 sollicite le levier 18 dans le sens inverse des aiguilles d'une montre, sur la figure 1, en direction de serrage des mors 16,17 sur le câble 10. L'ouverture de la pince 11 est commandée par un déplacement vers le bas du galet 20 à l'encontre de la force du ressort 23. Cette commande résulte d'un passage de la pince 11 sous une rampe 26 de commande qui engage le galet 20. Les rampes 26 sont disposées d'une part à l'entrée de la station pour désaccoupler la pince 11, roulant sur le rail 15, du câble 10 et d'autre part à la sortie pour réaccoupler la pince 11 au câble 10.The clamp 11 shown in Figure 1 has an elongated body 12 on which is articulated the end of a hanger 13 carrying the load (not shown). The body 12 also carries rollers 14 for rolling on support rails 15 in the stations. One of the ends of the body 12 is shaped as a fixed jaw 16, which cooperates with a movable jaw 17, articulated on the fixed jaw 16 and integral with the end of a control lever 18. The opposite end 19 of the lever 18 carries an axis 21 of articulation of a control roller 20 and an axis 22 of anchoring of a coil compression spring 23. The opposite end of the spring 23 is supported on a cup 24 secured to the body 12 by tie rods 25. A friction plate 27 is fixed on the body 12 to cooperate with friction wheels 28, which drive the clamp 11 uncoupled from cable 10 in stations. Such pliers are well known and it suffices to recall that the spring 23 biases the lever 18 anticlockwise, in FIG. 1, in the clamping direction of the jaws 16, 17 on the cable 10. L opening of the clamp 11 is controlled by a downward movement of the roller 20 against the force of the spring 23. This control results from a passage of the clamp 11 under a control ramp 26 which engages the roller 20 The ramps 26 are arranged on the one hand at the entrance to the station. for uncoupling the clamp 11, rolling on the rail 15, from the cable 10 and on the other hand at the outlet for re-coupling the clamp 11 to the cable 10.

En se référant plus particulièrement aux figures 2 et 3, qui illustrent une zone d'embrayage de la pince 11 à la sortie de la station, on voit que la pince 11 roulant sur le rail 15 en étant entraînée par les roues de friction 28, engage par son galet 20 l'entrée de la rampe 26 dans la position 6. La pince 11 est encore fermée, mais en poursuivant sa course dans le sens indiqué par la flèche sur la figure le galet 20 est déplacé vers le bas par l'action de la rampe 26 qui se rapproche du rail 15. Dans la position 7 la pince 11 est ouverte et le câble 10 s'engage entre les mors 16,17 ouverts. A cette position 7 correspond une inversion de pente de la rampe 26, laquelle s'écarte progressivement du rail 15 en autorisant une remontée du galet 20 et une fermeture de la pince 11 sous l'action du ressort 23. A la position 8 la pince 11 est fermée et le galet 20 quitte la rampe 26 ( position 9 ). La variation correspondante de l'action 29 exercée par le galet 20 sur la rampe 26 est représentée sur la figure 4 et on comprend que cette action augmente pendant la phase de compression du ressort 23 pour diminuer ensuite pendant la phase de fermeture de la pince 11 et s'annuler lorsque le galet 20 quitte la rampe 26.Referring more particularly to FIGS. 2 and 3, which illustrate a zone for clutching the clamp 11 at the outlet of the station, it can be seen that the clamp 11 rolling on the rail 15 while being driven by the friction wheels 28, engages by its roller 20 the entry of the ramp 26 in the position 6. The clamp 11 is still closed, but continuing its travel in the direction indicated by the arrow in the figure the roller 20 is moved downwards by the action of the ramp 26 which approaches the rail 15. In position 7 the clamp 11 is open and the cable 10 engages between the jaws 16,17 open. At this position 7 corresponds an inversion of slope of the ramp 26, which progressively deviates from the rail 15 allowing a rise of the roller 20 and a closing of the clamp 11 under the action of the spring 23. In position 8 the clamp 11 is closed and the roller 20 leaves the ramp 26 (position 9). The corresponding variation of the action 29 exerted by the roller 20 on the ramp 26 is shown in Figure 4 and it is understood that this action increases during the compression phase of the spring 23 to then decrease during the closing phase of the clamp 11 and cancel when the roller 20 leaves the ramp 26.

Selon l'invention le tronçon 30 de la rampe 26, qui s'étend le long de la zone de fermeture de la pince 11, est mécaniquement désolidarisé de l'autre partie fixe de la rampe et est porté par des pesons 31 mesurant la force ou l'action exercée par le galet 20 sur le tronçon 30. Il est clair que l'ensemble de la rampe 26 peut être agencé pour une telle mesure et que celle-ci peut être réalisée par d'autres moyens, notamment une simple balance. Dans l'exemple illustré par la figure 5 le tronçon 30 est monté à coulissement vers le haut, d'autres dispositions étant possibles.According to the invention, the section 30 of the ramp 26, which extends along the closing area of the clamp 11, is mechanically separated from the other fixed part of the ramp and is carried by load cells 31 measuring the force or the action exerted by the roller 20 on the section 30. It is clear that the whole of the ramp 26 can be arranged for such a measurement and that this can be carried out by other means, in particular a simple balance . In the example illustrated in FIG. 5, the section 30 is mounted to slide upwards, other arrangements being possible.

On voit sur la figure 1 que le galet 20 est disposé au droit du ressort 23 et que lorsque le galet 20 est en appui du tronçon 30 la force du ressort 20 est directement transmise au tronçon 30 aux frottements près, lesquels se résument d'ailleurs à ceux de l'articulation du levier 18. Dès que les mors 16,17 enserrent le câble 10 le levier 18 est bloqué, le galet 20 quitte le tronçon 30 et toute la force du ressort 23 est transférée aux mors 16,17, bien entendu multipliée dans un rapport constant par le levier 18. On comprend que la force de serrage des mors 16,17 sur le câble 10 correspond exactement à celle exercée sur le tronçon 30 à l'instant de la séparation du galet 20 du tronçon 30 avec un facteur de pondération donnéIt can be seen in FIG. 1 that the roller 20 is disposed in line with the spring 23 and that when the roller 20 is in support of the section 30 the force of the spring 20 is directly transmitted to the section 30 with the closest friction, which can be summed up moreover to those of the lever joint 18. As soon as the jaws 16.17 grip the cable 10 the lever 18 is blocked, the roller 20 leaves the section 30 and all the force of the spring 23 is transferred to the jaws 16.17, well heard multiplied in a constant ratio by the lever 18. It is understood that the clamping force of the jaws 16.17 on the cable 10 corresponds exactly to that exerted on the section 30 at the time of separation of the roller 20 from the section 30 with a given weighting factor

L' instant de séparation du galet 20 et du tronçon 30 peut être déduit de la courbe, représentée sur la figure 4, de l'action exercée sur la rampe 26 et plus particulièrement du point 32 de variation brusque vers la valeur zéro. Un microprocesseur ou tout autre automatisme détecte cette variation ainsi que la mesure précédant cette variation pour fournir une indication exacte de la force de serrage de la pince 11.The instant of separation of the roller 20 and the section 30 can be deduced from the curve, represented in FIG. 4, from the action exerted on the ramp 26 and more particularly from the point 32 of abrupt variation towards the zero value. A microprocessor or any other automatic device detects this variation as well as the measurement preceding this variation to provide an exact indication of the clamping force of the clamp 11.

En disposant selon l'invention une piste conductrice 33 sur la face d'appui du galet 20 sur le tronçon 30 et en utilisant des galets conducteurs 20, la séparation mécanique provoque une interruption du contact électrique facilement détectable et utilisable pour déclencher la mesure et éventuellement une alarme et un arrêt de l'installation.By having, according to the invention, a conductive track 33 on the bearing face of the roller 20 on the section 30 and by using conductive rollers 20, the mechanical separation causes an interruption of the electrical contact that is easily detectable and usable to initiate the measurement and possibly an alarm and a shutdown of the installation.

Il est clair que l'invention est applicable à d'autres types de pinces, notamment à deux positions stables, la pince restant ouverte en station. Dans ce cas la rampe ne comporte qu'une section de fermeture associée à un système de déverrouillage, ce qui n'affecte pas le dispositif de mesure. De même la relation entre la force du ressort et la force de serrage du câble n'est pas affectée par un système de leviers plus élaboré.It is clear that the invention is applicable to other types of clamps, in particular to two stable positions, the clamp remaining open in the station. In this case, the ramp has only one closing section associated with an unlocking system, which does not affect the measuring device. Likewise, the relationship between the spring force and the cable clamping force is not affected by a more sophisticated lever system.

Le dispositif de mesure est intégré à la rampe de commande de la pince et n'augmente pas l'encombrement de la station. Il peut facilement être adjoint à des installations existantes, sans aucune modification des pinces et être perfectionné pour effectuer une surveillance de l'évolution de la force du ressort et donc de l'état de la pince.The measuring device is integrated into the clamp control ramp and does not increase the size of the station. It can easily be added to existing installations, without any modification of the clamps and can be improved to monitor the evolution of the spring force and therefore the state of the clamp.

Claims (8)

Installation de transport à câble aérien (10) porteur-tracteur défilant en continu, notamment une télécabine ou un télésiège comprenant; - des pinces débrayables (11) d'accouplement de charges au câble, chaque pince ayant un levier d'actionnement (18) pour l'ouverture et la fermeture de la pince, un ressort (23) sollicitant ledit levier (18) en position de fermeture de la pince (11) et fournissant la force de serrage de la pince sur le câble (10) et un organe de commande (20) porté par ledit levier (18), - une rampe de commande (26) s'étendant le long de la trajectoire de défilement de la pince (11), à la sortie d'une station pour commander la fermeture de la pince et son embrayage sur le câble, ladite rampe (26) coopérant avec ledit organe de commande (20) au passage de la pince, - et un moyen de contrôle (30,31) du serrage de la pince, caractérisée en ce que le moyen de contrôle comporte un dispositif de mesure continue (31) de l'action exercée par l'organe de commande (20) sur la rampe (26) et un détecteur de l'instant de fermeture de la pince sur le câble (10) pour réaliser une mesure de ladite action à cet instant. Aerial cable transport installation (10) continuously moving carrier-tractor, in particular a cable car or chairlift comprising; - disengageable clamps (11) for coupling loads to the cable, each clamp having an actuating lever (18) for opening and closing the clamp, a spring (23) biasing said lever (18) in position closing the clamp (11) and supplying the clamping force of the clamp on the cable (10) and a control member (20) carried by said lever (18), - A control ramp (26) extending along the path of travel of the clamp (11), at the exit of a station to control the closing of the clamp and its clutch on the cable, said ramp (26 ) cooperating with said control member (20) in the passage of the clamp, - And a control means (30,31) of the clamping of the clamp, characterized in that the control means comprises a continuous measurement device (31) of the action exerted by the control member (20) on the ramp (26) and a detector of the instant of closing of the clamp on the cable (10) to measure said action at this instant. Installation selon la revendication 1, caractérisée en ce que ladite pince (11) comporte un mors fixe (16) et un mors mobile (17) monté à pivotement sur le mors fixe et solidaire de l'une des extrémités du levier (18) d'actionnement, dont l'autre extrémité porte ledit organe de commande (20).Installation according to claim 1, characterized in that said clamp (11) comprises a fixed jaw (16) and a movable jaw (17) pivotally mounted on the fixed jaw and integral with one of the ends of the lever (18) d actuation, the other end of which carries said control member (20). Installation selon la revendication 2, caractérisée en ce que le ressort (23) agit sur ladite autre extrémité en face de l'organe de commande (20).Installation according to claim 2, characterized in that the spring (23) acts on said other end opposite the control member (20). Installation selon la revendication 1,2 ou 3, caractérisée en ce que un tronçon (30) de la rampe (26), qui est disposé dans la zone de fermeture de la pince (11), est indépendant des autres parties de la rampe et est mobile en étant porté par des pesons (31).Installation according to claim 1,2 or 3, characterized in that a section (30) of the ramp (26), which is arranged in the clamp closing area (11), is independent of the other parts of the ramp and is movable by being carried by load cells (31). Installation selon la revendication 1,2,3 ou 4, caractérisée en ce que dans la zone de fermeture de la pince (11) ladite rampe (26) s'écarte de la trajectoire de défilement de la pince définie par le rail (15), pour autoriser un pivotement progressif du levier d'actionnement (18) en direction de fermeture de la pince sous l'action du ressort (23) au cours de l'avancement de la pince et que ledit organe d'actionnement (18) se separe de la rampe (26) à l'instant de fermeture de la pince.Installation according to claim 1,2,3 or 4, characterized in that in the clamp closing area (11) said ramp (26) deviates from the running path of the clamp defined by the rail (15) , to allow a progressive pivoting of the actuation lever (18) in the direction of closing of the clamp under the action of the spring (23) during the advancement of the clamp and that said actuating member (18) is separates from the ramp (26) when the clamp closes. Installation selon l'une quelconque des revendications précédentes, caractérisée en ce que ledit détecteur (33) est agencé pour détecter une séparation dudit organe de commande (20) de ladite rampe (26).Installation according to any one of the preceding claims, characterized in that said detector (33) is arranged to detect a separation of said control member (20) from said ramp (26). Installation selon la revendication 6, caractérisée en ce que ladite rampe (26) comporte une piste (33) électriquement conductrice , qui s'étend le long de la face d'appui de l'organe de commande (20), également conducteur, pour fermer un circuit électrique lorsque l'organe de commande est en appui de la rampe et interrompre ce circuit à l'instant de séparation.Installation according to claim 6, characterized in that said ramp (26) comprises an electrically conductive track (33) which extends along the bearing face of the control member (20), also conductive, for close an electrical circuit when the control member is in support of the ramp and interrupt this circuit at the instant of separation. Installation selon l'une des revendications 1 à 5, caractérisée en ce que ledit détecteur est agencé pour détecter une variation brusque vers zéro de ladite mesure de l'action exercee par l'organe de commande (20) sur la rampe (26).Installation according to one of claims 1 to 5, characterized in that said detector is arranged to detect an abrupt variation towards zero of said measurement of the action exerted by the control member (20) on the ramp (26).
EP93420325A 1992-08-05 1993-07-27 Checking the clamping pressure of a detachable grip of a ropeway Expired - Lifetime EP0582528B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9209821A FR2694534B1 (en) 1992-08-05 1992-08-05 Clamping control of a disengageable clamp of a teleporter.
FR9209821 1992-08-05

Publications (2)

Publication Number Publication Date
EP0582528A1 true EP0582528A1 (en) 1994-02-09
EP0582528B1 EP0582528B1 (en) 1997-01-22

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EP93420325A Expired - Lifetime EP0582528B1 (en) 1992-08-05 1993-07-27 Checking the clamping pressure of a detachable grip of a ropeway

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EP (1) EP0582528B1 (en)
AT (1) ATE148057T1 (en)
DE (1) DE69307622D1 (en)
FR (1) FR2694534B1 (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0842837A1 (en) 1996-11-15 1998-05-20 Pomagalski S.A. Transporting plant with aerial cable and releasable cable grippers including means for measuring the clamping force of the cable grippers.
EP1361133A1 (en) * 2002-05-10 2003-11-12 Innova Patent GmbH Device for checking the clamping force of the coupling assembly for a movable transport unit of a cableway installation
WO2014125423A1 (en) 2013-02-12 2014-08-21 Universidad Eafit Monitoring system of vehicle circulation conditions at the connection and operation point between the cable, car, station and support clamp in a cable drawn transport system
ITTO20130559A1 (en) * 2013-07-04 2015-01-05 Dimensione Ingenierie S R L SYSTEM TO VERIFY THE FUNCTIONING OF DEVICES AT THE PLACE OF A RUNNING TRACK

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH509900A (en) * 1969-09-08 1971-07-15 Wallmannsberger Georg Ing Dr Clamping device for single-cable gondola with transport devices that can be coupled to the cable
FR2449011A1 (en) * 1979-02-15 1980-09-12 Girak Bruder DEVICE FOR CONTROLLING THE TIGHTENING FORCE OF THE CLAMPS OF AIR COUPLING CONVEYORS
DE3305111A1 (en) * 1982-06-04 1983-12-08 Voest-Alpine AG, 4010 Linz Actuation device for toggle clamps of cable cars which can be coupled
EP0181244A1 (en) * 1984-10-15 1986-05-14 Pomagalski S.A. Weighing apparatus for clips, in particular for a detachable cableway or chair lift

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH509900A (en) * 1969-09-08 1971-07-15 Wallmannsberger Georg Ing Dr Clamping device for single-cable gondola with transport devices that can be coupled to the cable
FR2449011A1 (en) * 1979-02-15 1980-09-12 Girak Bruder DEVICE FOR CONTROLLING THE TIGHTENING FORCE OF THE CLAMPS OF AIR COUPLING CONVEYORS
DE3305111A1 (en) * 1982-06-04 1983-12-08 Voest-Alpine AG, 4010 Linz Actuation device for toggle clamps of cable cars which can be coupled
EP0181244A1 (en) * 1984-10-15 1986-05-14 Pomagalski S.A. Weighing apparatus for clips, in particular for a detachable cableway or chair lift

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0842837A1 (en) 1996-11-15 1998-05-20 Pomagalski S.A. Transporting plant with aerial cable and releasable cable grippers including means for measuring the clamping force of the cable grippers.
EP1361133A1 (en) * 2002-05-10 2003-11-12 Innova Patent GmbH Device for checking the clamping force of the coupling assembly for a movable transport unit of a cableway installation
WO2014125423A1 (en) 2013-02-12 2014-08-21 Universidad Eafit Monitoring system of vehicle circulation conditions at the connection and operation point between the cable, car, station and support clamp in a cable drawn transport system
ITTO20130559A1 (en) * 2013-07-04 2015-01-05 Dimensione Ingenierie S R L SYSTEM TO VERIFY THE FUNCTIONING OF DEVICES AT THE PLACE OF A RUNNING TRACK

Also Published As

Publication number Publication date
FR2694534B1 (en) 1994-10-14
DE69307622D1 (en) 1997-03-06
FR2694534A1 (en) 1994-02-11
EP0582528B1 (en) 1997-01-22
ATE148057T1 (en) 1997-02-15

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