EP2934981B1 - Dispositif de serrage pour câbles - Google Patents

Dispositif de serrage pour câbles Download PDF

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Publication number
EP2934981B1
EP2934981B1 EP13828840.2A EP13828840A EP2934981B1 EP 2934981 B1 EP2934981 B1 EP 2934981B1 EP 13828840 A EP13828840 A EP 13828840A EP 2934981 B1 EP2934981 B1 EP 2934981B1
Authority
EP
European Patent Office
Prior art keywords
lever
cable
clamping device
slider
support 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.)
Not-in-force
Application number
EP13828840.2A
Other languages
German (de)
English (en)
Other versions
EP2934981A1 (fr
Inventor
Sergio Blengini
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.)
DIMENSIONE INGENIERIE Srl
Original Assignee
DIMENSIONE INGENIERIE Srl
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by DIMENSIONE INGENIERIE Srl filed Critical DIMENSIONE INGENIERIE Srl
Publication of EP2934981A1 publication Critical patent/EP2934981A1/fr
Application granted granted Critical
Publication of EP2934981B1 publication Critical patent/EP2934981B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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

Definitions

  • the present invention relates to a clamping device for automatic connection of a vehicle to a cable of a continuously moving cableway.
  • clamping devices there are those comprising a support element securable to a suspension arm of a vehicle and forming the fixed jaw of the clamp, while the movable jaw is formed by an end of an operating rocker lever which is hinged with the support element for oscillating in a vertical plane.
  • a slider is slidably mounted on the operating lever, said slider being elastically urged towards the jaws by two helical springs.
  • a cam system which is integral with the support system, interacts with the slider so as to convert the thrust exerted by the springs into a reaction force which rotates the lever upwards, causing the movable jaw to clamp the cable against the fixed jaw.
  • EP 0 621 163 A1 discloses a clamping device for coupling a gondola or chair to the a cable of a continuously moving cableway.
  • the device comprises a fixed jaw, an operating rocker lever oscillating in a vertical plane, and a movable jaw formed at a first end of the operating lever, an elastic element in form of a torsion spring and a mechanism for converting the thrust exerted by the torsion spring into a force for rotating the rocker lever and the movable jaw to clamp the cable against the fixed jaw.
  • the clamping device comprises a testing device for testing the clamping force.
  • the testing device includes a test spring which is mounted on the rocker lever and acts counter to the torsion spring.
  • the cableway stations are generally provided with load cells associated with one of the ramps which cause opening or closing of the clamps.
  • the load cells control the efficiency of the clamp springs when a vehicle passes by, measuring the thrust acting on the ramp when passed over by the clamp. Considering that this detection operation is performed in a fraction of a second and that the vehicles pass through the ramps at a considerable speed (about 5 metres per second), it can be understood that the measurement of the thrust of the springs is adversely affected both by the considerable mass of the clamp which engages the ramp and by the limited amount of time during which detection must be performed. In addition, imprecise setting of the load cells may result in a fault not being detected.
  • One object of the present invention is to detect, in a reliable manner and without the use of electronic devices or additional mechanisms, the undamaged condition of the springs intended to perform clamping of the clamp on the cable. Another object of the invention is to detect in good time any defects or breakages of the springs. A further object of the invention is to achieve the aforementioned objects in a low cost manner, using mechanical components which are relatively simple to produce.
  • a clamping device having the features defined in Claim 1.
  • a cableway having the features defined in Claim 7 is provided. Preferred embodiments of the invention are defined in the dependent claims.
  • a clamping device for automatic connection of a vehicle to a cable of a continuously moving cableway comprises:
  • the elastic elements comprise at least one first elastic unit and at least one second elastic unit.
  • the elastic units are consecutively aligned and compressed along the operating lever.
  • the first elastic unit closer to the first end of the lever, acts against the slider; the second elastic unit, farther from the first end of the lever, acts against a reaction plate locked along the lever.
  • the device also comprises an intermediate plate slidably mounted along the operating lever and arranged between the first and second elastic units.
  • the intermediate plate has at least one portion protruding outwardly beyond the elastic units in a direction transverse to the operating lever. The position of the protruding portion provides a clear indication of the efficiency of the clamp.
  • a detector is provided at a location adjacent to the path of the cable, the detector having a passage limited by a pair of surfaces spaced apart in a direction perpendicular to the cable.
  • the protruding portion of the intermediate plate passes through the aforementioned passage, without interfering with any of the spaced surfaces of the detector.
  • 10 designates overall a clamping device for automatic connection of a vehicle to a cable F of a continuously moving cableway, be it a cable-car or a chair-lift.
  • the clamping device 10 comprises a movable jaw 11 and a fixed jaw 12.
  • the fixed jaw 12 is formed integrally by a support element 13 to which a suspension arm S of a vehicle (not shown) is secured.
  • the type of suspended vehicle for example consisting of a cabin or chair, is not relevant for the purposes of applicability of the present invention.
  • the support element 13 which is known per se, may comprise a pair of parallel vertical plates 14 which are spaced from each other in a direction parallel to that of the cable F.
  • the support element 13 carries, by means of a shaft A, a roller wheel R1 known as a "third wheel".
  • the movable jaw 11 is defined by a first end of an operating rocker lever 15 hinged with the support element 13 to a fulcrum 16 about an axis of oscillation substantially parallel to the cable F, so as to be able to rotate in a substantially vertical plane, between a position closing on or clamping the cable ( Figure 1 ) and an open position ( Figure 2 ).
  • the operating lever 15 has a second end 18 on which a roller R2 (known per se) is rotatably mounted so as to cause oscillation of the lever 15 about the fulcrum 16 with consequent displacement of the movable jaw 11 away from the cable F.
  • the operating lever 15 has, slidably mounted thereon, a slider 20 which is preferably formed as a flat sliding plate, with a tubular central portion 21 inserted on the lever 15 and a plate portion 22 which extends transversely with respect to the lever 15.
  • the slider 20 is connected in an articulated manner with the support element 13 by means of a mechanism which comprises, in an advantageous embodiment, a pair of connecting rods 23 which are arranged parallel and alongside each other in a direction parallel to the cable F; only one of the connecting rods is visible in Figures 1 and 2 .
  • the connecting rods 23 are pivotably mounted to the slider 20 and on the support element 13 about two respective pins 24, 25 parallel to the axis of oscillation of the operating lever 15.
  • Elastic elements preferably helical springs 30, 31, 32, 33 designed to urge the connecting rods 23 against the support element 13 are arranged between the slider 20 and the second free end 18 of the lever.
  • the connecting rods 23 convert the axial thrust exerted by the elastic elements 30-33, which are compressed along the longitudinal axis of the lever 15, into a reaction force having a component perpendicular to the longitudinal axis of the lever. This perpendicular component stresses the lever 15, causing it to oscillate or rotate upwards so that the movable clamp 11 clamps the cable F against the fixed jaw 12.
  • the elastic elements 30-33 act against a fixed reaction plate 19 which is locked to the free end 18 of the lever, adjacent to the end roller R2.
  • the end roller R2 is intended to cooperate, in a manner known per se, with a profiled fixed guide (not shown) provided at the stations for arrival and departure of the vehicle.
  • All the elastic elements 30-33 cooperate so as to cause the operating lever 15 to rotate towards the raised position for clamping the cable F.
  • the elastic elements are divided into two elastic units (or groups) which are aligned consecutively along the lever 15.
  • the first of these two units comprising the springs 30 and 31, is closer to the movable jaw 11 and pushes against the slider 20.
  • the second elastic unit which comprises the springs 32 and 33, is farther from the jaw and pushes against the end reaction plate 19.
  • Each elastic unit acts in a thrusting relationship against an intermediate plate 35 slidably mounted along the operating lever 15 in an intermediate position between the slider 20 and the reaction plate 19 and arranged between the first and second elastic units.
  • the intermediate plate 35 which is preferably made of light material, for example aluminium or aluminium alloy, has an outer peripheral portion 36 which protrudes outwardly beyond the helical springs 30, 32 in a radial or transverse direction with respect to the axial direction in which the lever 15 extends.
  • the protruding portion 36 of the intermediate plate acts as a detection element for checking the undamaged condition of the springs.
  • the intermediate plate 35 will be positioned in an axial equilibrium position, different from that shown in Figure 1 , i.e. closer towards or further away from the jaw 11, depending on which elastic unit includes the damaged spring. A different axial position of the intermediate plate 35 indicates a defective condition of any one of the springs 30-33.
  • the aforementioned checking method is inherently safe because it allows a malfunction to be detected irrespective as to the defective element involved.
  • the present checking device distinguishes substantially the clamping device from known devices which envisage a functional check by means of a system of non self-checking opposed springs. In these known devices, a breakage of one of the opposing springs affects the checking efficiency since the breakage cannot be verified during the course of normal operation of the cableway. With the present clamping device, the spatial position of the projecting portion 36 provides a clear indication of the efficiency of the clamp based on an inherent safety principle.
  • the intermediate plate 35 comprises a tubular or sleeve-like central portion 37 slidably mounted on the lever 15 so as to precisely guide the plate 35.
  • the two series of oppositely arranged springs rest, in this example, against a disc portion 38 which extends transversely or perpendicularly with respect to the tubular central portion 37 and the operating lever 15.
  • both the intermediate plate 35 as well as the slider 20 and the reaction plate 19 may be configured differently from the example shown here. In general, each of these components (35, 20, 19) should provide a stable support seat for the ends of the helical springs.
  • the intermediate plate 35 may have a containing edge (not shown) for the ends of the springs, similar to the edges 26 and 27 of the slider 20 and the end plate 19. It is possible to provide the components 35, 20 and 19 with other shapes suitable for retaining the end parts of the springs, for example concavities and recesses in the form of annular grooves.
  • Figure 1 shows, schematically designated by D, a mechanical detector which is arranged at a location along the path of the cable, for example at a station of the cableway.
  • the detector D provides a passage P, defined for example between a pair of facing walls B1, B2 which extend in a direction substantially parallel to the cable and which define between them a range of positions indicating the correct operation of the springs.
  • the detector D is positioned with respect to the path followed by the clamping device 10 so that, if the springs of the device are undamaged, the protruding portion 36 of the intermediate plate 35 passes inside the space or passage P lying between the two walls B1, B2 without coming into contact with the latter.
  • the device may be set to cause immediate stoppage of the cable.
  • the detector D may be mounted in a movable or floating manner on a stationary support C, for example operationally coupled to a microswitch (not shown) of an alarm or emergency device which is activated by the contact of the intermediate plate 35 with the detector D and/or by the movement of one of the components of the detector (for example one of the two walls B1 or B2) following contact with the intermediate plate.
  • a microswitch not shown
  • the detector D may be mounted in a movable or floating manner on a stationary support C, for example operationally coupled to a microswitch (not shown) of an alarm or emergency device which is activated by the contact of the intermediate plate 35 with the detector D and/or by the movement of one of the components of the detector (for example one of the two walls B1 or B2) following contact with the intermediate plate.
  • the clamping device allows a fault to be detected in good time, by means of mechanical elements which are relatively simple and inherently safe. Additional checking mechanisms or devices are not required.
  • a possible fault affecting any one of the springs 30-33 for closing the movable jaw 11 is indicated by the springs themselves, which vary the position of the intermediate plate 35.
  • each of the two elastic units may comprise a single elastic element instead of two elements.
  • only two single springs for example the single springs 31 and 33 may be provided, said springs being consecutively aligned along the lever 15 and acting respectively against the slider 20 and against the end plate 19 and being separated by the intermediate plate.
  • the damaged spring will also continue to exert a residual thrust in the axial direction at least equal to 85% of the nominal value, thus contributing to the correct operation of the clamp as a whole.
  • a broken spring may be arranged crosswise, without providing any thrust, and, protruding from the clamping device, may risk striking and damaging other parts of the cable plant, or fall off.
  • the intermediate plate is coupled with and guided precisely on the lever; therefore it is possible to detect a longitudinal position of the intermediate plate which is only slightly outside of a range of positions predefined as being permissible or indicative of correct operation with undamaged springs.
  • the system comprising the clamping device with intermediate plate and the associated detector is therefore very sensitive and reliable.
  • the mechanism which converts the axial thrust of the springs into a transverse thrust and causes closing of the jaws could, in an alternative embodiment, comprise a cam device with rollers instead of the connecting rods 23, as illustrated for example in U.S. patent No. 4,760,798 .
  • a mechanism with connecting rods is however advantageous in that it constitutes a constructional simplification and allows a reduction in costs.
  • the arrangement of two connecting rods 23, aligned in a direction parallel to the axis of oscillation defined by the pin 16, forms an additional safety element, making the system redundant.
  • the clamping device may however function also with a single connecting rod 23.
  • the elastic elements may be formed by different devices, for example springs having a form other than a helical spring, such as Belleville springs.
  • Different aspects and embodiments of the clamping device have been described. It is understood that each embodiment may be combined with any other embodiment.
  • the invention moreover, is not limited to the embodiments described, but may be varied within the scope defined by the accompanying claims.

Landscapes

  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Clamps And Clips (AREA)
  • Mechanical Control Devices (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Paper (AREA)
  • Communication Cables (AREA)

Claims (10)

  1. Dispositif de serrage (10) pour relier automatiquement un véhicule à un câble (F) d'un téléphérique à mouvement continu comprenant :
    - un élément de support (13) fixable à un bras de suspension (S) d'un véhicule ;
    - une mâchoire fixe (12) faisant partie intégrante avec l'élément de support (13) ;
    - un levier oscillant opérationnel (15) articulé sur l'élément de support (13) pour osciller dans un plan sensiblement vertical ;
    - une mâchoire mobile (11) formée à une première extrémité du levier opérationnel (15) ;
    - un coulisseau (20), monté de manière coulissante sur le levier opérationnel ;
    - au moins deux éléments élastiques (31, 33) montés sur le levier opérationnel (15) de façon à pousser le coulisseau (20) vers la première extrémité du levier,
    - un mécanisme (23) relié au coulisseau (20) et à l'élément de support (13), pour convertir une poussée exercée par les éléments élastiques (31, 33) vers la première extrémité du levier (15) en une force perpendiculaire au levier, de façon à faire tourner le levier vers le haut amenant la mâchoire mobile (11) à serrer le câble (F) contre la mâchoire fixe (12) ;
    caractérisé en ce que
    les éléments élastiques comprennent au moins une première unité élastique (30, 31) et au moins une seconde unité élastique (32, 33), alignées consécutivement et comprimées le long du levier opérationnel (15), dans lequel la première unité élastique (30, 31), plus proche de la première extrémité du levier, agit contre le coulisseau (20), et la seconde unité élastique (32, 33), plus éloignée de la première extrémité du levier, agit contre une plaque de réaction (19) verrouillée le long du levier, et en ce que
    le dispositif (10) comprend en outre une plaque intermédiaire (35) montée de manière coulissante le long du levier opérationnel (15) et agencée entre les première (31) et seconde (33) unités élastiques, dans lequel la plaque intermédiaire fournit au moins une partie (36) qui fait saillie vers l'extérieur au-delà des unités élastiques (30, 32) dans une direction transversale au levier opérationnel (15).
  2. Dispositif de serrage selon la revendication 1, caractérisé en ce que les éléments élastiques (30 à 33) comprennent des ressorts hélicoïdaux.
  3. Dispositif de serrage selon la revendication 2, caractérisé en ce que
    la première unité élastique comprend deux ressorts hélicoïdaux (30, 31) agencés coaxialement l'un par rapport à l'autre et comprimés entre le coulisseau (20) et la plaque intermédiaire (35), et en ce que
    la seconde unité élastique comprend deux ressorts hélicoïdaux (32, 33) agencés coaxialement l'un par rapport à l'autre et comprimés entre la plaque intermédiaire (35) et la plaque de réaction (19).
  4. Dispositif de serrage selon l'une quelconque des revendications précédentes, caractérisé en ce que le mécanisme (23) comprend au moins une tige de liaison (23) montée de manière pivotante sur le coulisseau (20) et l'élément de support (13) autour de deux broches (24, 25) respectives qui sont parallèles à un axe d'oscillation défini par une autre broche (16) au moyen de laquelle le levier opérationnel (15) est articulé sur l'élément de support (13).
  5. Dispositif de serrage selon la revendication 4, caractérisé en ce que le mécanisme (23) comprend au moins deux tiges de liaison (23) toutes deux montées de manière pivotante sur le coulisseau (20) et l'élément de support (13) autour de deux broches (24, 25) respectives qui sont parallèles à un axe d'oscillation défini par l'autre broche (16) au moyen de laquelle le levier opérationnel (15) est articulé avec l'élément de support (13) et en ce que les deux tiges de liaison sont espacées l'une de l'autre et alignées dans une direction parallèle à la direction de l'axe d'oscillation de l'autre broche (16).
  6. Dispositif de serrage selon l'une quelconque des revendications précédentes, caractérisé en ce que la plaque intermédiaire (35) comprend une partie de guidage centrale (37) de forme tubulaire, montée de manière coulissante sur le levier opérationnel (15), et une partie de disque (38) s'étendant de manière transversale depuis la partie centrale (37), et en ce que la partie en saillie (36) est formée par une partie périphérique externe de la partie de disque (38), la position spatiale de la partie en saillie (36) fournissant une indication claire de l'efficacité du serrage selon un principe de sécurité intrinsèque.
  7. Téléphérique à mouvement continu, comprenant un câble (F) et une pluralité de véhicules, chacun connectable automatiquement au câble (F) au moyen d'une pluralité respective de dispositifs de serrage (10) selon au moins une des revendications précédentes, caractérisé en ce que le téléphérique comprend au moins un détecteur (D) agencé à un emplacement adjacent au trajet du câble (F), le détecteur présentant un passage (P) limité par une paire de surfaces (B1, B2) espacées dans une direction essentiellement perpendiculaire au câble (F) audit emplacement, moyennant quoi les parties en saillie (36) des plaques intermédiaires (35) passent à travers le passage (P) sans interférer avec l'une ou l'autre des surfaces (B1, B2) lorsque les deux unités élastiques d'un dispositif de serrage (10) unique ne sont pas endommagées.
  8. Téléphérique selon la revendication 7, caractérisé en ce que les surfaces (B1, B2) sont définies par deux parois respectives s'étendant dans une direction essentiellement parallèle au câble audit emplacement.
  9. Téléphérique selon la revendication 7 ou 8, caractérisé en ce que les surfaces (B1, B2) sont montées de manière mobile sur un support fixe (C).
  10. Téléphérique selon l'une quelconque des revendications 7 à 9, caractérisé en ce que le détecteur (D) est associé à un groupe générateur de signal pour générer un signal lorsqu'au moins une des parties en saillie (36) des plaques intermédiaires (35) entre en contact avec au moins une des surfaces (B1, B2) du passage (P).
EP13828840.2A 2012-12-19 2013-12-19 Dispositif de serrage pour câbles Not-in-force EP2934981B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT001105A ITTO20121105A1 (it) 2012-12-19 2012-12-19 Dispositivo a morsa per funivie.
PCT/IB2013/061131 WO2014097204A1 (fr) 2012-12-19 2013-12-19 Dispositif de serrage pour câbles

Publications (2)

Publication Number Publication Date
EP2934981A1 EP2934981A1 (fr) 2015-10-28
EP2934981B1 true EP2934981B1 (fr) 2019-10-16

Family

ID=47683961

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13828840.2A Not-in-force EP2934981B1 (fr) 2012-12-19 2013-12-19 Dispositif de serrage pour câbles

Country Status (4)

Country Link
EP (1) EP2934981B1 (fr)
CN (1) CN104884327B (fr)
IT (1) ITTO20121105A1 (fr)
WO (1) WO2014097204A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR3038282B1 (fr) * 2015-06-30 2017-08-11 Lst Ropeway Systems Dispositif d’accouplement destine a accoupler un vehicule a un cable tracteur d’une installation de transport
ITUB20155619A1 (it) * 2015-11-16 2017-05-16 Dimensione Ingenierie S R L Dispositivo a morsa per funivie
CN113560787A (zh) * 2020-04-28 2021-10-29 无锡市众辰汽车配件有限公司 一种涡轮增压器中间体工装夹具

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT1187954B (it) * 1986-02-21 1987-12-23 Agudio Spa Dispositivo per il collegamento automatico di un veicolo alla fune od a ciascuna delle due funi di una funivia a moto continuo
FR2656579A1 (fr) * 1989-12-29 1991-07-05 Transport Etudes Pince debrayable pour la fixation et le detachement automatique des vehicules du cable tracteur en correspondance dans les gares.
IT1244238B (it) * 1990-09-10 1994-07-08 Leitner Spa Dispositivo di controllo della forza di serraggio di una morsa ad ammorsamento automatico su una fune portante traente in sistemi di impianti funiviari.
AT404458B (de) * 1993-03-30 1998-11-25 Doppelmayr & Sohn Vorrichtung zum ankuppeln eines fahrbetriebsmittels
AT402630B (de) * 1993-09-21 1997-07-25 Steurer Johann Ing Kuppelbare seilklemme kuppelbare seilklemme
AT405389B (de) * 1998-01-13 1999-07-26 Doppelmayr & Sohn Vorrichtung zum ankuppeln eines fahrbetriebsmittels an das förder- bzw. zugseil einer seilbahnanlage
IT1317222B1 (it) * 2000-04-12 2003-05-27 Leitner Spa Dispositivo di serraggio automatico per impianti funiviari di tipobifune

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN104884327A (zh) 2015-09-02
CN104884327B (zh) 2017-07-28
ITTO20121105A1 (it) 2014-06-20
EP2934981A1 (fr) 2015-10-28
WO2014097204A1 (fr) 2014-06-26

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