EP0456735B1 - Dispositif pour tester des pince-cable dans des teleferiques - Google Patents

Dispositif pour tester des pince-cable dans des teleferiques Download PDF

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Publication number
EP0456735B1
EP0456735B1 EP19900903061 EP90903061A EP0456735B1 EP 0456735 B1 EP0456735 B1 EP 0456735B1 EP 19900903061 EP19900903061 EP 19900903061 EP 90903061 A EP90903061 A EP 90903061A EP 0456735 B1 EP0456735 B1 EP 0456735B1
Authority
EP
European Patent Office
Prior art keywords
pulling
implement
cable
clamp
force sensor
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP19900903061
Other languages
German (de)
English (en)
Other versions
EP0456735A1 (fr
Inventor
Fredrik ÖHRNELL
Bo Estemark
H kan ÖHRNELL
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.)
Handelsbolaget Ohrnell-Teknik
Original Assignee
Handelsbolaget Ohrnell-Teknik
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 Handelsbolaget Ohrnell-Teknik filed Critical Handelsbolaget Ohrnell-Teknik
Priority to AT90903061T priority Critical patent/ATE98579T1/de
Publication of EP0456735A1 publication Critical patent/EP0456735A1/fr
Application granted granted Critical
Publication of EP0456735B1 publication Critical patent/EP0456735B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

  • the present invention relates to a device for testing cable clamps of ski lifts.
  • problems arise in certain cases due to the fact that the cable clamps do not obtain a correct clamping force on the pulling cable.
  • a number of near-accidents are described where cable clamps have slid on the cable due to insufficient clamping force.
  • the design of cable clamps can be divided into two main types, viz. fixed clamps and releasably connected clamps.
  • fixed clamps the clamping force is obtained by means of washer springs, which are tightened against a stop member or with a dynamometric wrench.
  • releasable cable lifts which are particularly used at chair lifts and cabin cableways, the clamping force is normally obtained by means of washer springs, but also other solutions exist.
  • the object of the invention is to suggest a device for testing cable clamps for ski lifts which is simple to apply and preferably can be fixedly mounted in association with a lift.
  • the device according to the invention comprises a pulling implement designed to be applied in a pulling position over a cable clamp so that it can exert a pulling force on the clamp in the direction of the cable, a mounting means for suspending the pulling implement in association with the cable, a manipulating means for moving the pulling implement to and from the pulling position, respectively, and a pulling means connected to the pulling implement via a pulling force sensor.
  • the mounting means is preferably arranged for fixed mounting of pulling implement, manipulating means, pulling means and pulling force sensor on a supporting structure belonging to the lift.
  • a pulling implement supporting frame manipulated by the manipulating means, also supports an opening means for opening a cable clamp to be tested, for allowing movement of the same on the cable befor testing.
  • This supporting structure can be located e.g. in association with a station.
  • the pulling cable of the lift is designated 4.
  • the chair carried by the same has been omitted from the Figures.
  • the clamp is supposed to be a releasably connected clamp of a type earlier known per se. More particularly, the type here intended, at its end remote from the clamp end, has a pressure point 8 ( Figure 5) at the pressing in of which the clamp spring, not shown, is actuated so that the clamp is momentarily loosened from the cable 4.
  • the beam 2 carries a cradle generally designated 10.
  • the cradle 10 comprises two upper parallel side beams 12 and 14, respectively, pivotally carried at one end thereof by the beam 2 at horizontal pivots 16 and 18, respectively.
  • two operating cylinders 22 and 24, respectively, are pivotally connected for moving the craddle 10 about the pivot points 16 and 18.
  • the pivot point 18 of the beam 14 in fact extends through a further beam 26 attached to the underside of the beam 2 on line with the beam 14.
  • the beams 14 and 26 are essentially square and in the interior thereof serve as a guide for each a carriage 28 and 30, respectively.
  • the carriages 28, 30 via a longitudinal slot in the bottom of the respective beam 14 and 26 carry a pulling implement, generally designated 32, and pulling force sensor 34, respectively.
  • the pulling implement 32 comprises a pulling bar portion 36 extending in parallel with the beam 14, below the same, and is pivotally connected with one end of the pulling force sensor 34 about a horisontal pivot 38.
  • a pulling piston 40 of a pulling cylinder 42 is pivotally connected to the other end of the pulling force sensor 34 about a horisontal pivot 44.
  • the cylinder 42 is mounted to a further fixed structure 46, not described, of the cableway. More particularly, the cylinder 42 is pivotally suspended via brackets 48 in the structure 46 about a pivot axis 50 parallel to the pivots 38 and 44.
  • the pulling bar portion 36 extending vertically over the cable 4 with part of its length, in the vicinity of the end portion of the beam 14 remote from the pivot 18 is curved at 52 so as to obtain a portion 50 (Figure 3) extending in parallel with the beam 20 and via a bend 56 ( Figure 2) passing into a portion 58 ( Figure 2) parallel to the beam 14.
  • the portion 58 which is parallel to the portion 36 thus becomes sidewardly shifted with respect to the portion 36. More particularly, this shift is such that the portion 58 is located in a vertical plane extending in close vicinity to the clamp portion, designated 60, of the cable clamp 6 where this clamp portion 60 has just passed into a flat and wide portion of the control housing 62 of the clamp.
  • the portion 58 via a further bend 64 passes into a portion 66 vertically extending in said vertical plane, and extending essentially in a longitudinal vertical plane of symmetry of the clamp 6 to immediately above the upper side of the housing 62. From the portion 66 a pulling hook formed by three further bends 68, 70 and 72, respectively, finally extends. This pulling hook extends in said vertical plane for close engagement about the housing 62 in the way shown in the Figures.
  • a vertically extending plate shaped strut 74 and 76 is attached to each end of the beam 12 .
  • a canted guide beam 78 with a quadrature section extends in parallel with the beam 12.
  • a carriage 80 is movably arranged along the length thereof.
  • the carriage 80 partly encloses the beam 78 with a curved wall, at the inside of which four roller pairs 82 are attached for engaging each its side of the beam 78. More particularly, the carriage 80 can be of the type WV3-25F from Vahle and need therefor not be described more closely here.
  • the transverse strut 90 extends from the vicinity of the periphery of the plate 86 to the inside of the bend 64 of the pulling implement where it is fixed by welding.
  • the transverse strut 92 extends in parallel with the strut 90 from the vicinity of the periphery of the plate 86 into engagement in the bend 68 of the pulling implement, where it is fixed by welding, and from where the transverse strut 92 is bent downwardly to a portion 94 provided for engagement against the outside of the clamp portion 60 of the clamp 6.
  • the pressure cylinder 88 is attached to the plate 86 so that its pointed pressure piston 96 is directed towards the pressure point 8 at the end of the clamp 6 remote from the clamp portion 60 and so that the pressure point 8 lies within the length of stroke of the piston 96.
  • the pulling force sensor 34 which can e.g. be of the ⁇ hrnell strain guage type LOD-G, is connected, in a manner not shown, to a central instrument with digital display of peak value and mean value of the exerted pulling force.
  • the craddle 10 and the parts carried thereby are pulled up around the pivots 16, 18 by means of the cylinders 22 and 24 so that clamps attached to the cable 4 are kept clear from the pulling hook 68, 7o, 72.
  • a first step for use of the equipment is now to lower the craddle 10 so that the pull bar 36 grips the clamp 6 by means of the pulling hook 68, 70, 72 in the manner described above.
  • a second step the pressure piston 96 of the pressure cylinder 88 via the pressure point 8 presses in the spring of the cable clamp 6 so that the. cable clamp is released from the cable.
  • the cylinder 42 is activated to pull the clamp 6 via the pulling implement 32 along the cable to the intended testing position.
  • the last mentioned step should be carried through often in order not to damage the cable by the testing.
  • pulling force testing of the cable clamp is now carried through by means of the hydraulic cylinder 42. More particularly, the hydraulic cylinder 42 is caused to pull until the clamp 6 loosens from the cable 4.
  • the exerted pulling force is continously sensed by the pulling force sensor 34, the signal of which is received by the above mentioned central instrument, which stops on the highest pulling value. Thereby information is received whether the cable clamp adheres with the correct pressing force in accordance with the recommendations of the manufacturer.
  • the pulling force uses to vary between 600 and 1000 kg.
  • the craddle 10 When the testing of a clamp is finished, the craddle 10 is pulled up so that the cable clamp can be driven further and a new test cycle with the next clamp be started.
  • Operation and measuring value recording are suitably carried through from an operator's cabin located in association with the cable way.
  • the measured values can be stored in a computer if desired, which gives a continous check of the clamps.
  • the condition of the clamps can then be continously supervised, which leads to a safe operation of the cable way and cassation of the clamps at the right time.
  • a mechanical screw jack or a manually operated capstan can be used as a pulling means. Allthough the equipment is contemplated to be mounted on the lift, also movable variants of the same are conseivable. For a fixedly mounted equipment a hydraulic cylinder or a mechanical capstan are most suitable as pulling means.
  • the advantage of a fixedly mounted equipment is that testing of the pulling force can be carried through more regularly and in a safe and comfortable way.
  • the embodiment according to Figures 6-9 comprises two wedges 100 connected to a beam 102, e.g. of aluminium.
  • the beam 102 carries a pulling piston 104 connected to a pulling hook 108 via a pulling force sensor 106.
  • elements 104, 106 and 108 correspond to elements 42, 34 and 68-72, respectively, of the preceding embodiment, the pulling piston 104 being also used for moving the pulling hook to and from its operation position and thereby replacing the cylinders 22/24 of the earlier embodiment.
  • the pulling hook 108 is pivoted at 110 so that it is upwardly swingable in the direction of the arrow 112 when the pulling hook contacts a stop 114 on the side of the beam 102 under the influence of the pulling hook being shifted out by the pulling piston 104. Thereby the hook 108 gets clear from the cable clamps. From the above it appears, at a comparison with the earlier embodiment, that the pulling piston has taken over also the function of cylinders 22, 24 to lift the pulling hook clear from the cable clamps.
  • each cable clamp carries an attachment, generally designated 116, for the clamp, designated 117 in Figure 7.
  • the clamp housing 115 contains a clamp actuating spring, not shown.
  • the attachment 116 includes a rod 118 for operating the clamp (the spring).
  • the outer end of the rod 118 carries a wheel pair 120.
  • the attachment 116 is carried on the end of the housing 115 at 122 and there has a clamping end 124 facing the wheel pair 120.
  • the clamp takes the successive positions A, B, and C shown in Figure 7.
  • the wedges 100 are moved in between the clamping end 124 and the wheels 120.
  • the wedges 100 have pressed the wheels 120 outwardly so that the spring releases the clamp 117, which can thereby be moved to the intended testing place in the same way and for the same purpose as has been described for the preceding embodiment.
  • the wedges 100 allow the wheels 120 to return so that the clamp is fixed and can be exposed to pulling tests with the arrangement shown in Figure 6.
  • the distance between the positions A and B is a releasing distance
  • the distance between the positions B and C is a moving distance for the clamp 117.
  • the pulling hook here designated 130
  • the pulling cylinder 132 is connected at 134 to a cradle 136 which is pivotally carried at 138 by a slide 140.
  • the slide 140 is linearly guided on a guide 142 included in a frame, generally designated 144.
  • the slide 140 has a supporting roller or sliding rib 146 engaging the guide.
  • a stop abutment 148 is arranged at the fore end of the guide 142 .
  • a cam profile 150 for the supporting roller 146 is arranged on the end side of the frame 144.
  • An attachment point 152 is provided for attaching one end of a pulling force sensor 154, the other end of which is connected to the end 156 of the cylinder 132 remote from the craddle 136.
  • the pulling force sensor 154 has the same function as the pulling force sensor 34 in the first embodiment.
  • the craddle 136 As indicated in Figure 10 the craddle 136, besides the pulling test position shown with solid lines, has a position shown with dashed lines, in which it is swinged up, out of the moving path of the cable clamps, analogous to the case in the previous embodiments. This position is reached after the craddle operated by the piston 132 has been stopped by the stop abutment 148, and under the continuing action of the piston 132 has rotated about the pivot point 135, forcing the supporting roller 146 to move upwardly on the cam profile 150 to the postion shown.
  • the slide 140 can carry a means (not shown) for supervising the clamping force of a clamp.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)

Abstract

Un dispositif pour tester des pince-câble (6) dans des remonte-pente comprend un instrument de traction (32) destiné à être appliqué dans une position de traction sur un pince-câble (6) de manière à pouvoir exercer une force de traction sur ce dernier dans le sens du câble (4), un moyen de fixation (10) pour suspendre l'instrument de traction (32) en association avec le câble, un moyen de manipulation (22, 24) pour déplacer l'instrument de traction (32) vers et depuis la position de traction, respectivement, et un moyen de traction (42) relié à l'instrument de traction (32) par l'intermédiaire d'un capteur de force de traction (34). Il est prévu en outre un moyen (88, 96) pour ouvrir un pince-câble (6) à tester afin de permettre le déplacement de ladite pince le long du câble avant essai.

Claims (14)

  1. Dispositif pour tester des pinces-câbles (6) dans des ski-lifts, caractérisé par un mécanisme de traction (32) prévu pour être appliqué dans une position de traction au-dessus d'une pince-cable (6) de telle manière qu'il puisse exercer une force de traction sur la pince en direction du câble (4), des moyens de montage (10) pour suspendre le mécanisme de traction (32) associé au câble, des moyens d'actionnement (22,24) pour déplacer le mécanisme de traction (32) dans et hors la position de traction respectivement et des moyens de traction (42) connectés au mécanisme de traction (32) par l'intermédiaire d'un détecteur (34) de la force de traction.
  2. Dispositif selon la revendication 1, caractérisé en ce que le mécanisme de traction (32) comprend une barre de traction (36) dont une extrémité est connectée au détecteur de la force de traction (34) et l'autre extrémité présente un crochet de traction (68,70,72) destiné à être appliqué sur la pince-câble (6) au voisinage du câble.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que les moyens de montage comprennent des moyens (28,30) pour ajustablement suspendre le mécanisme de traction (32) et le détecteur de la force de traction (34) le long du câble.
  4. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le mécanisme de traction (32) est articulé au détecteur de la force de traction (34) pour permettre de pivoter vers le haut le mécanisme à partir de la pince-câble (6) par l'intermédiaire des moyens d'actionnement (22,24).
  5. Dispositif selon la revendication 4, caractérisé en ce que le détecteur de la force de traction (34) et le mécanisme de traction (32) sont mobilement supendus dans des guides (26,14) prévus pour s'étendre parallèlement au câble (4), les guides étant articulés l'un à l'autre, et en ce que les moyens d'actionnement comprennent des moyens de levage (22,24) agissant sur le guide (14) du mécanisme de traction (32).
  6. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens de traction (42) sont suspendus de manière pivotante et articulés au détecteur de la force de traction (34) par une extrémité de traction.
  7. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens de montage (10) sont prévus pour fixer le mécanisme de traction (32), les moyens d'actionnement (22,24), les moyens de traction (42) et le détecteur de la force de traction (34) sur un support (2,46) associé au lift.
  8. Dispositif selon la revendication 7, caractérisé en ce qu'un cadre (12,14,20) déplaçable par les moyens d'actionnement (22,24) et portant le mécanisme de traction (32) porte également des moyens (88,96) destiné à ouvrir une pince-câble (6) à être testée, pour permettre son déplacement le long du câble avant le test.
  9. Dispositif selon la revendication 8, caractérisé en ce que les moyens (88,96) sont disposés pour ouyrir la pince-câble (6) lorsque le mécanisme de traction (32) est engagé avec elle, et en ce que les moyens de traction (42) sont disposés pour ensuite tirer la pince-câble (6) dans une position de test désirée sur le câble où la pince-câble en vue d'être testée est à nouveau fixée.
  10. Dispositif selon les revendications 5 et 9, caractérisé en ce que la pince (6) est d'un type connu en soi qui peut être ouverte au moyen d'un outil à un point (8) d'engagement sur la pince, que le cadre (12,14,20) comprend une poutre (12) montée latéralement par rapport au mécanisme de traction (32) et s'étendant parallèlement au guide (14) du mécanisme de traction tout en étant fixée à ce guide mais pouvant pivoter autour d'un axe de pivotement (16) coaxial avec l'axe de pivotement (18) du guide du mécanisme de traction, ladite poutre (12) étant prévue pour porter des supports (80,86), déplaçable le long de la poutre, pour les moyens (88,96) pour ouvrir la pince formant lesdits moyens d'actionnement, les supports (80, 86) étant accouplés au mécanisme de traction (32) et portant les moyens d'actionnement (88,96) de manière à pouvoir être déplacés jusqu'au point (8) d'engagement d'une pince-cable (sur lequel le mécanisme de traction (32) est appliqué dans une position de traction.
  11. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que le détecteur de la force de traction (34) est connecté à un indicateur pour la plus grande valeur de la traction à laquelle il est exposé lors du test.
  12. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens de traction comprennent un cylindre hydraulique, une broche filetée de traction ou un cric manuel.
  13. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce que les moyens de traction (104) sont utilisés comme moyens d'actionnement.
  14. Dispositif selon l'une quelconque des revendications précédentes, caractérisé en ce qu'un mécanisme pour ouvrir la pince-cable est porté par la structure du mécanisme de traction.
EP19900903061 1989-02-03 1990-02-05 Dispositif pour tester des pince-cable dans des teleferiques Expired - Lifetime EP0456735B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT90903061T ATE98579T1 (de) 1989-02-03 1990-02-05 Klemmenpruefvorrichtung fuer kabelbahnen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE8900378A SE463408B (sv) 1989-02-03 1989-02-03 Anordning foer provning av linklaemmor hos skidliftar
SE8900378 1989-02-03

Publications (2)

Publication Number Publication Date
EP0456735A1 EP0456735A1 (fr) 1991-11-21
EP0456735B1 true EP0456735B1 (fr) 1993-12-15

Family

ID=20374939

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19900903061 Expired - Lifetime EP0456735B1 (fr) 1989-02-03 1990-02-05 Dispositif pour tester des pince-cable dans des teleferiques

Country Status (6)

Country Link
EP (1) EP0456735B1 (fr)
AU (1) AU5088890A (fr)
DE (1) DE69005295T2 (fr)
ES (1) ES2049466T3 (fr)
SE (1) SE463408B (fr)
WO (1) WO1990008684A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2750764B1 (fr) * 1996-07-04 1998-09-18 Pomagalski Sa Dispositif de telemesure de la force de serrage d'une pince

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH493353A (de) * 1968-07-08 1970-07-15 Von Roll Ag Einrichtung zum Festklemmen eines Transportgerätes an einem Zugseil und zum Anzeigen einer ungenügenden Klemmverbindung
AT313363B (de) * 1969-02-03 1974-01-15 Ceretti & Tanfani Spa Vorrichtung zum pruefen der klemmkraft der kuppelgeraete bei seilbahnen

Also Published As

Publication number Publication date
EP0456735A1 (fr) 1991-11-21
DE69005295T2 (de) 1994-07-07
SE8900378D0 (sv) 1989-02-03
ES2049466T3 (es) 1994-04-16
SE463408B (sv) 1990-11-19
WO1990008684A1 (fr) 1990-08-09
SE8900378L (sv) 1990-08-04
DE69005295D1 (de) 1994-01-27
AU5088890A (en) 1990-08-24

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