EP0582528B1 - 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 PDFInfo
- Publication number
- EP0582528B1 EP0582528B1 EP93420325A EP93420325A EP0582528B1 EP 0582528 B1 EP0582528 B1 EP 0582528B1 EP 93420325 A EP93420325 A EP 93420325A EP 93420325 A EP93420325 A EP 93420325A EP 0582528 B1 EP0582528 B1 EP 0582528B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- grip
- ramp
- cable
- closing
- operating element
- 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
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Classifications
-
- 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.
- Document EP-A-0 181 244 describes a device for measuring the force exerted by the gripper control member on a T-shaped control ramp.
- a notch, formed on a section of the leg of the T confers a certain flexibility in the sole of the T which cooperates with the control member.
- a proximity sensor capable of measuring the deformation of the sole when passing a clamp, under the action of the control member. The maximum deformation and therefore the maximum measurement occurs when the clamp is in the middle of the flexible section opposite the proximity detector and this measurement is compared with a threshold value, to trigger a display and / or an alarm if it is less than this. threshold.
- 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 installation according to the invention can use a clamp of the type described in French patent No. 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 control 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.
- 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.
- 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 bears 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 entire ramp 26 can be arranged for such a measurement and that it can be performed 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 easily detectable and usable to trigger the measurement and possibly an alarm and a installation stopped.
- the installation according to the invention can use other types of clamps, in particular at 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)
- Casting Devices For Molds (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Labeling Devices (AREA)
- Installation Of Indoor Wiring (AREA)
- Insulated Conductors (AREA)
Abstract
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.
- 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 to control 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.
Le document EP-A-0 181 244 décrit un dispositif de mesure de la force exercée par l'organe de commande de la pince sur une rampe de commande en forme de T. Une entaille, ménagée sur un tronçon de la jambe du T confère une certaine flexibilité à la semelle du T qui coopère avec l'organe de commande. Au milieu de cette partie flexible est disposé un détecteur de proximité susceptible de mesurer la déformation de la semelle au passage d'une pince, sous l'action de l'organe de commande. La déformation maximale et donc la mesure maximale intervient lorsque la pince est au milieu du tronçon flexible en regard du détecteur de proximité et cette mesure est comparée à une valeur de seuil, pour déclencher un affichage et/ou une alarme si elle est inférieure à ce seuil. Lorsque la mesure est supérieure à ce seuil et en prenant une marge de sécurité, on peut admettre que la force de serrage de la pince sur le câble, assuré par le ressort, est suffisante. Cette force de serrage n'est toutefois pas mesurée. Avec l'usure du câble et des mors de la pince la fermeture de la pince intervient en des points différents de la rampe, généralement écartés du point de mesure au milieu de la partie flexible et la force mesurée est donc différente de la force de serrage. La mesure est ponctuelle, au milieu de la partie flexible et une mesure en un autre point est forcément faussée par la variation de la flexion de la partie flexible.Document EP-A-0 181 244 describes a device for measuring the force exerted by the gripper control member on a T-shaped control ramp. A notch, formed on a section of the leg of the T confers a certain flexibility in the sole of the T which cooperates with the control member. In the middle of this flexible part is placed a proximity sensor capable of measuring the deformation of the sole when passing a clamp, under the action of the control member. The maximum deformation and therefore the maximum measurement occurs when the clamp is in the middle of the flexible section opposite the proximity detector and this measurement is compared with a threshold value, to trigger a display and / or an alarm if it is less than this. threshold. When the measurement is above this threshold and taking a safety margin, it can be assumed that the clamping force of the clamp on the cable, provided by the spring, is sufficient. However, this clamping force is not measured. With the wear of the cable and the jaws of the clamp, the clamp is closed at different points on the ramp, generally separated from the measuring point in the middle of the flexible part and the force measured is therefore different from the clamping force. . The measurement is punctual, in the middle of the flexible part and a measurement at another point is necessarily distorted by the variation in the bending of the flexible part.
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.
Avantageusement, l'installation selon l'invention peut employer 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.Advantageously, the installation according to the invention can use a clamp of the type described in French patent No. 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 control 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 clamp closing stroke the action on the ramp decreases regularly, due to a progressive relaxation of the spring and this action suddenly goes 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.
- 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
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
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
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.The
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
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
En disposant 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 a
Il est clair que l'installation selon l'invention peut utiliser 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 installation according to the invention can use other types of clamps, in particular at 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)
- Transport installation having an aerial continuously running carrier haulage cable (10), in particular a gondola or chair lift, comprising:- detachable grips (11) for coupling loads on to the cable, each grip having an operating lever (18) for opening and closing the grip, a spring (23) urging said lever towards the grip (11) closing position and producing the grip clamping force on the cable (10) and a operating element (20) supported by said lever (18),- an operating ramp (26) extending along the movable grip (11) trajectory, at a station exit for operating the closing of the grip and its coupling to the cable, said ramp (26) cooperating with said operating element (20) at the passage of the grip,- and control means (30,31) of the grip clamping,
characterized in that the control means comprises a device (31) for continuously measuring the action exerted by said operating element (20) on said ramp (26) and a detector of the moment of the closing of the grip on the cable (10) to provide a measure of said action at this moment. - Installation according to claim 1, characterized in that said grip (11) comprises a fixed jaw (16) and a movable jaw (17) rotatably mounted on the fixed jaw and secured to one end of the operating lever (18), the other end of which supporting the operating element (20).
- Installation according to claim 2, characterized in that the spring (23) acts on said other extremity facing the operating element (20).
- Installation according to claim 1, 2 or 3, characterized in that a section (30) of the ramp (26), located in the grip (11) closing zone, is independent from the other parts of the ramp and is movably supported by scales (31).
- Installation according to claim 1, 2, 3 or 4, characterized in that in the grip (11) closing zone said ramp (26) deviates from the grip trajectory, defined by the rail (15), to allow a progressive rotation of the operating lever (18) towards the grip closing position under the spring (23) action, during the advance of the grip and that said operating element (20) separates from the ramp (26) at the grip closing moment.
- Installation according to any of the preceding claims, characterized in that said detector (33) is devised to detect the separation of said operating element (20) from said ramp (26).
- Installation according to claim 6, characterized in that said ramp (26) comprises an electric conductive path (33), which extends along the bearing face of the operating element (20), also conductor, to close an electric circuit when the operating element is leaned on the ramp, and to interrrupt this circuit at the moment of the separation.
- Installation according to any of the claims 1 to 5, characterized in that said detector is devised to detect a sudden variation towards zero of said measure of the action exerted by the operating element (20) on the ramp (26).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9209821 | 1992-08-05 | ||
FR9209821A FR2694534B1 (en) | 1992-08-05 | 1992-08-05 | Clamping control of a disengageable clamp of a teleporter. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0582528A1 EP0582528A1 (en) | 1994-02-09 |
EP0582528B1 true EP0582528B1 (en) | 1997-01-22 |
Family
ID=9432714
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93420325A Expired - Lifetime EP0582528B1 (en) | 1992-08-05 | 1993-07-27 | Checking the clamping pressure of a detachable grip of a ropeway |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0582528B1 (en) |
AT (1) | ATE148057T1 (en) |
DE (1) | DE69307622D1 (en) |
FR (1) | FR2694534B1 (en) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2755930B1 (en) | 1996-11-15 | 1998-12-31 | Pomagalski Sa | AIR CABLE TRANSPORTATION SYSTEM, WITH RELEASABLE CLAMPS, INCLUDING MEANS FOR MEASURING THE TIGHTENING OF THE CABLE BY THE CLAMPS |
EP1361133B1 (en) * | 2002-05-10 | 2005-04-27 | Innova Patent GmbH | Device for checking the clamping force of the coupling assembly for a movable transport unit of a cableway installation |
CO7030190A1 (en) | 2013-02-12 | 2014-08-21 | Univ Eafit | System for monitoring the condition of vehicle circulation at the point of connection and operation between the cable, the cabin, the station and the support clamp in a cable traction 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 |
Family Cites Families (4)
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 |
DE3005092A1 (en) * | 1979-02-15 | 1980-08-28 | Girak Geb | DEVICE FOR TESTING THE CLAMPING FORCE OF CLAMPING DETACHABLE CABLE CARS |
AT373217B (en) * | 1982-06-04 | 1983-12-27 | Voest Alpine Ag | ACTUATING DEVICE FOR TOGGLE CLAMP CLUTCHABLE ROPEWAYS |
FR2571848B1 (en) * | 1984-10-15 | 1988-08-05 | Pomagalski Sa | DEVICE FOR WEIGHING CLAMPS, ESPECIALLY A CABLE CAR OR A DETACHABLE CABLE |
-
1992
- 1992-08-05 FR FR9209821A patent/FR2694534B1/en not_active Expired - Fee Related
-
1993
- 1993-07-27 AT AT93420325T patent/ATE148057T1/en not_active IP Right Cessation
- 1993-07-27 DE DE69307622T patent/DE69307622D1/en not_active Expired - Lifetime
- 1993-07-27 EP EP93420325A patent/EP0582528B1/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0582528A1 (en) | 1994-02-09 |
FR2694534B1 (en) | 1994-10-14 |
ATE148057T1 (en) | 1997-02-15 |
DE69307622D1 (en) | 1997-03-06 |
FR2694534A1 (en) | 1994-02-11 |
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