EP1757338A2 - Parcours à câbles pour le ski nautique - Google Patents

Parcours à câbles pour le ski nautique Download PDF

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Publication number
EP1757338A2
EP1757338A2 EP06017900A EP06017900A EP1757338A2 EP 1757338 A2 EP1757338 A2 EP 1757338A2 EP 06017900 A EP06017900 A EP 06017900A EP 06017900 A EP06017900 A EP 06017900A EP 1757338 A2 EP1757338 A2 EP 1757338A2
Authority
EP
European Patent Office
Prior art keywords
cable
track installation
water
installation according
ski track
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.)
Withdrawn
Application number
EP06017900A
Other languages
German (de)
English (en)
Other versions
EP1757338A3 (fr
Inventor
Pieter Christoffel Maria Van Beers
Jacobus Antonius Petrus Paulissen
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1757338A2 publication Critical patent/EP1757338A2/fr
Publication of EP1757338A3 publication Critical patent/EP1757338A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B61—RAILWAYS
    • B61B—RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR
    • B61B11/00—Ski lift, sleigh lift or like trackless systems with guided towing cables only
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B69/00—Training appliances or apparatus for special sports
    • A63B69/18—Training appliances or apparatus for special sports for skiing
    • A63B69/187—Training appliances or apparatus for special sports for skiing for water-skiing
    • 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
    • B61B12/10—Cable traction drives
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2225/00—Miscellaneous features of sport apparatus, devices or equipment
    • A63B2225/30—Maintenance

Definitions

  • the present invention relates in general to a cable water-ski track installation.
  • Such installation is intended to pull a water-skier along a predetermined loop-shaped track.
  • This track is defined by a horizontal towing cable, which is displaced horizontally in itself, comparable to a tow lift.
  • this towing cable is provided with coupling members, to which a ski cable can be coupled.
  • a water-skier holds himself to this towing cable, and in this way he is towed through the water.
  • the towing cable is tightened around running wheels above the water, which running wheels in turn are suspended from pylons. Between two successive pylons, the towing cable follows a straight trajectory, and at the location of a pylon the towing cable can make a turn.
  • the track is rectangular, defined by four pylons, but a more complicated track with multiple pylons is also possible. The total length of the track can be in the order of a kilometre.
  • the towing cable is implemented as a double cable, comprised of two steel cables positioned above each other, which will individually be indicated as “elementary cable”, and which are mutually connected to each other.
  • Each elementary cable is guided over its own running wheels. Therefore, there are always two running wheels mounted above each other, the upper running wheel for the upper elementary cable and the lower running wheel for the lower elementary cable. This combination of running wheels mounted above each other will be indicated as a "running wheel set”.
  • both running wheels of a running wheel set can form a rigid whole, but in practice this is not advantageous. For instance because differences can occur in the diameters of the running wheels, while the peripheral velocity of the running wheels must be mutually equal, it must be possible to tolerate differences in the rotational velocities of the running wheels. This is to say that the running wheels must be capable of having a rotation differential velocity.
  • one of the said running wheels is driven by a motor.
  • the single motor must be a strong and expensive motor, furthermore has a large weight.
  • this driven running wheel is coupled to the other running wheel of the same running wheel set by a differential gear.
  • a differential gear is subject to wear and tear and requires relatively much maintenance.
  • a differential gear has a heavy construction, which contributes to the total weight of the driving construction, such that the pylon in question must be designed for such large weight.
  • the large driving force required is transferred to the towing cable at only one single location, which causes strong wear and tear, and which causes a large tension force to be present in the towing cable part immediately before the engine and a relatively low tension force in the towing cable part immediately after the engine.
  • the present invention intends to eliminate or at least reduce this disadvantages.
  • the present invention intends to provide an improved cable water-ski track installation.
  • two or more, and preferably all running wheels are driven wheels.
  • this motor drive preferably comprises multiple motors, i.e. one motor for each running wheel.
  • the motor drive thus has two motors.
  • the individual motors can be smaller, such that their total weight can be lower than the weight of a single motor with same overall power. Further, through a suitable electronic control of the individual motors, the mechanical differential gear can be omitted, which further reduces the weight of the drive.
  • a pylon carrying such motor drive can therefore be designed lighter.
  • a motor drive is arranged in each pylon, and the towing cable is thus driven by each running wheel set.
  • the drive construction can then have a lower weight, so that also the pylon can be implemented lighter.
  • the towing cable is no longer subjected to one single large pulling force, but to multiple pulling forces divided along the length of the towing cable, wherein in each case the load of the cable is lower, so that also the wear and tear is reduced.
  • the towing cable at each coupling location for ski cables is provided with an illumination source, which provides a coupled skier with light. Because of this, it is also possible that the cable water-ski track installation is used under dark conditions, for instance in the evening.
  • the illumination source comprises an electrical lamp, and electrical energy is supplied through the towing cable.
  • Each coupling location is preferably provided with a switch or the like, which switches the corresponding illumination source on or off, depending on the presence of a coupled ski cable.
  • the towing cable in a bend, is guided by an assembly of multiple running wheels.
  • the towing cable in each bend is guided by a single running wheel.
  • the towing cable at each bend makes an angle of 90°, and thus contacts the running wheel over a trajectory of 90°.
  • the running wheels it is undesirable that the cable makes a sharp bend, and therefore the running wheels have a relatively large diameter, in the order of 1.5 metre. This in turn means that the running wheels are relatively heavy and strongly contribute to the weight load of the pylons. Maintenance to the running wheels, and/or replacement of the running wheels, is therefore relatively difficult, too.
  • the single running wheel is replaced by an assembly of multiple running wheels, at least two, but preferably three or even more.
  • these multiple running wheels are located along a curved trajectory, which can have a relatively large radius, while the diameters of the individual running wheels can be relatively small. Then, the individual running wheels have smaller weights, and are easier to handle. Also the wear and tear is less.
  • the individual running wheels are coupled together for rotation, so that they all transfer pulling force to the towing cable.
  • FIG 1A schematically shows a top view of a cable water-ski track installation 1 according to the present invention.
  • water 2 for instance a river, lake, sea or an artificial pool of water
  • four carrying pylons 4 are arranged in a rectangular pattern; however, the number of pylons may be more or less than four.
  • the carrying pylons can have a mutually identical construction.
  • Each carrying pylon 4 carries a cable wheel system 40, which will be described more elaborately later.
  • a towing cable 10 is, like a loop in a horizontal plane, tightened around the cable wheel systems 40, and is driven for displacement into itself.
  • the towing cable 10 makes a horizontal bend, in the example shown a bend of 90°, the strain force in the towing cable having a resultant force pushing this cable against the cable wheel system 40.
  • the towing cable 10 is provided with coupling points 60, to which a ski cable 61 can be attached. Some of these coupling points 60 are schematically shown in the figure. The number of coupling points 60 can vary, but in practice will typically be in the order of ten.
  • a water-skier 62 can be pulled along over the water 2, as schematically shown in the sight view of figure 1B, wherein this water-skier 62 follows a track that corresponds to the pattern of the pylons 4. Since cable water-ski track installations are known per se, a further explanation is not needed.
  • Driving the towing cable 10 is implemented by driving a cable wheel system 40.
  • a cable wheel system 40 In the case of known cable water-ski track installations, only one of the cable wheel systems is a driving wheel system, and the remaining cable wheel systems are free-rotating guiding wheel systems.
  • all cable wheel systems 40 are driving wheel systems, and are thus provided with corresponding driving motors M.
  • each pylon 4 thus carries one or multiple motors M with a lower weight.
  • each motor M drives a running wheel set or an individual running wheel of the corresponding cable wheel system 40. Since constructions for coupling a motor with a drive wheel through a transmission system are known per se, and persons skilled in the art can conceive several variations for such constructions, such construction is not shown here in detail.
  • each cable wheel system 40 is driven by an associated motor, this is not essential for the present invention.
  • An advantage is already offered if two or more of the cable wheel systems 40 are driven by respective motors.
  • the total pulling force to be transferred to the towing cable 10 is distributed evenly over the motors; preferably, the motors are therefore mutually identical.
  • the cable wheel systems 40 can also be mutually identical.
  • the towing cable 10 is a composite cable comprised of at least two mutually parallel, elementary cables 11, 12 above each other and coupled to each other (see figure 3A-B).
  • a cable wheel system 40 has a cable guiding wheel set 140 comprising two or more guiding wheels 141, 142 arranged above each other, i.e. one guiding wheel per elementary cable.
  • the cable wheel system 40 has an associated motor M1, M2 for each guiding wheel 141, 142, as schematically illustrated in figure 1C.
  • Both motors M1, M2 are driven by a common controller C, which can individually set the rotation velocities of the two motors M1, M2.
  • each guiding wheel 141, 142 is provided with a sensor 151, 152 for measuring the peripheral velocity thereof, which sensors 151, 152 provide measuring signals to the controller C, so that the controller C can set the rotation velocities of the two motors M1, M2 in such a way that the two peripheral velocities are mutually identical.
  • FIG. 2A is a block diagram schematically illustrating an example of a control of four different motors M.
  • Each motor M1, M2, M3, M4 is controlled by a corresponding frequency regulator F1, F2, F3, F4, and all frequency regulators in turn are controlled by a common controller C.
  • F1, F2, F3, F4 is controlled by a common frequency regulator FC (figure 2B).
  • a motor M1 is controlled by a master frequency regulator F1
  • the remaining motors M2, M3, M4 are controlled by corresponding frequency regulators F2, F3, F4 which in turn are coupled as "slave” to the master frequency regulator F1 (figure 2C).
  • a cable wheel system 40 is provided with means for detecting the occurrence of skidding between the towing cable and the corresponding cable drive wheels, and to adapt the rotation velocity of the corresponding motor M in order to eliminate this skidding.
  • FIG 3A schematically shows a cross section of the towing cable 10, to illustrate that the towing cable 10 is implemented as a multiple cable, in this case a double cable, consisting of two mutually parallel elementary cables 11, 12, which, by means of an interconnection construction 13, are mutually fixed with respect to each other at a mutual distance of for instance approximately 50 cm. Further, the two elementary cables 11, 12 are substantially located in a vertical plane; the upper cable will be indicated as upper cable 11, and the lower cable will be indicated as lower cable 12.
  • the elementary cables 11, 12 can be made of steel, but preferably they are made of, or provided with, strong plastic fibres such as Kevlar or the like, in order to save weight and reduce the occurrence of stretch.
  • the interconnection construction 13 comprises two transverse connection rods 14, 15, which are arranged at a mutual distance of for instance approximately 1 metre, such as schematically illustrated in figure 3B.
  • Each transverse connection rod 14, 15 has an upper end fixed to the upper cable 11, for instance through a clamping bracket, and a lower end fixed to the lower cable 12, for instance also by a clamping bracket.
  • the interconnection construction 13 further comprises two cross stretched tension cables 16, 17, which mutually connect the upper ends and the lower ends of the transverse connecting rods 14, 15 to each other.
  • Such interconnection constructions 13 are arranged to the towing cable 10 at regular intervals.
  • Figure 3B also illustrates a coupling member 60, for coupling a ski tow cable. Since such coupling members are known per se, and the invention can be implemented while using such known coupling members, figure 3A does not show design details of the coupling member 60, but the coupling member 60 is displayed as a simple hook for sake of simplicity.
  • the coupling member 60 is connected to the under side of the lower cable 12.
  • the coupling member 60 may be directly fixed to the lower cable 12, but it is also possible that the coupling member 60 is fixed to the interconnection construction 13, such as illustrated.
  • a transverse connection rod 14 is longer than the mutual distance between the two elementary cables 11, 12, in which case the lower end of this transverse connection rod 14 extends below the lower cable 12, and the coupling member 60 is fixed to this projecting lower end of this transverse connection rod 14.
  • a spotlight 63 or the like is attached to the connection construction 13 at each coupling member 60, for instance to a transverse connection rod, for instance to the said projecting lower end of the transverse connection rod 14.
  • the spotlight 63 is directed such that it illuminates at least the water surface in front of the corresponding water-skier 62. Because of this, it is possible that the water-ski track can be used more hours per day, for instance even during the evening when it is dusky or dark.
  • the spotlight 63 For supplying the spotlight 63, in principle use can be made of batteries, but it is preferred that the spotlight 63 is supplied from a central supply.
  • the two elementary cables 11, 12 can be used as current conducting cables, if the two elementary cables are made of an electrically conductive material, or are at least partly provided with an electrically conductive part.
  • the two elementary cables 11, 12 carry a supply voltage for the spotlight 63.
  • This supply voltage can be a direct voltage, but preferably is an alternating voltage.
  • the supply voltage is about 40-50 Volt, although a different suitable operating voltage can also be used.
  • the towing cable 10 is provided with separate supply wires.
  • FIG. 4A schematically illustrates that a suitable supply source 64, for instance a transformer connected to mains, can be attached to the fixed world, and that the output terminals of this supply source 64 are coupled to the respective elementary cables 11, 12 by means of wiper contacts 65 (known per se) in order to transfer the voltage generated by the supply source 64 to the elementary cables 11, 12.
  • wiper contacts 65 known per se
  • electrically conductive contact wheels could also be used.
  • the wiper contacts 65 are displaceable between an operating position where they make contact to the respective cables 11, 12 (figure 4A), and a rest position where they are free of the respective cables 11, 12 (figure 4B).
  • the wiper contacts 65 are placed in their rest position; when the spotlights 63 are needed, the wiper contacts 65 are placed in their operative position.
  • connection construction 13 is implemented electrically insulating.
  • the transverse connecting rods 14, 15 and the tension cables 16, 17 could, at least over a part of their length, be made of an electrically insulating material.
  • Figure 4C schematically illustrates this at a larger scale for the first transverse connection rod 14 where the spotlight 63 is suspended from.
  • the first transverse connection rod 14 here comprises an upper rod part 14B which is electrically conductive and which is electrically and mechanically connected to the upper cable 11, and a lower rod part 14B which is electrically conductive and which is electrically and mechanically connected to the lower cable 12.
  • the first transverse connection rod 14 further comprises a central rod part 14C that is made of an electrically insulating material, for instance a plastic.
  • a power socket 66 is attached, to which a connector (not shown for sake of simplicity) of the spotlight 63 can be connected.
  • a first contact of the power socket 66 is electrically connected to the lower rod part 14B, for instance by means of a first wire 67A.
  • a second contact of the power socket 66 is electrically connected to the upper rod part 14A, for instance by means of a second wire 67B, that is provided with an insulating sheath (not shown for sake of simplicity).
  • the three rod parts 14A, 14C, 14B are hollow tubes, and the second wire 67B is guided in the interior of these three tubes.
  • the electrically conductive upper and lower rod parts 14A, 14B may be provided with insulating inner mantles, or can be provided with hollow insulating sealing plugs 68, as shown.
  • FIG. 4D is a schematic block diagram, illustrating that a coupling member 60 can be provided with a couple detector 70, designed to detect whether a ski cable 61 is coupled to the corresponding coupling member 60, and to control a switch 71 arranged in the lamp circuit depending on this detection.
  • this switch 71 is arranged in one of the wires 67A, 67B that connect the power socket 66 to the rod 14.
  • this switch it may be more advantageous to arrange this switch in the first wire 67A (as illustrated) or in the second wire 67B.
  • the switch 71 is a double-contact switch, incorporated in both wires.
  • a loudspeaker (not shown) is mounted at each coupling member 60.
  • Signals for the loudspeakers can be transmitted through the cables 11, 12, in a similar way as the supply voltage for the lamp; a separation filter can easily separate the sound signals and the lamp supply, as will be clear to a person skilled in the art.
  • a separation filter can easily separate the sound signals and the lamp supply, as will be clear to a person skilled in the art.
  • each cable wheel system 40 comprises, for each of the elementary cables of the towing cable 10, a single cable wheel 141, 142 with a fairly large diameter, typically in the order of one and a half metre.
  • a cable wheel system 40 comprises an assembly of multiple cable guiding wheels arranged in series for guiding an elementary cable 11, 12 of the towing cable 10.
  • such assembly of multiple cable guiding wheels 41 arranged in series is thus provided for the upper cable 11, and such assembly of multiple cable guiding wheels 41 arranged in series is thus provided for the lower cable 12, as schematically illustrated in the cross-section of figure 5A.
  • Each cable guiding wheel 41, 42 can be made of metal, for instance aluminium, and has a groove-shaped recess in its peripheral edge, in which a plastic lining 43 is arranged.
  • Two cable guiding wheels 41, 42 can always be positioned above each other, and mutually coupled to each other for an equal rotation. The combination of two such cable guiding wheels 41, 42 above each other forms in turn a guide wheel set.
  • Figure 5B is a schematic side view of a possible embodiment of a cable wheel system 40, where the cable wheel system 40 comprises a carrying frame 44, and three axles 45A, 45B, 45C that respectively carry the cable guiding wheels 41A, 42A; 41A, 42B; 41C, 42C.
  • the carrying frame 44 is connected to the corresponding pylon 4 (see figure 1A).
  • the associated motor M drives one of the axles, for instance the middle axle 45B, which to that end is provided with a gear wheel or chain wheel 46.
  • those cable guiding wheels 41B, 42B which are mounted on this axle driven by the motor M are drive wheels.
  • the remaining cable guiding wheels 41A, 42A; 41C, 42C may be freely running guiding wheels, but preferably they are drive wheels as well; to that end, the three axles 45A, 45B, 45C are provided with respective gear wheels 47A, 47B, 47C, which are mutually coupled through intermediate wheels 48. Alternatively, the gear wheels could be coupled by a chain.
  • the gear wheels 47A, 47B, 47C are mutually identical, all cable guiding wheels rotate with mutually equal peripheral velocities.
  • the motor M directly drives all cable guiding wheels. Further it is possible that there are two motors, one for the wheels 41 and one for the wheels 42.
  • Figure 5C is a schematic top view of the cable wheel system 40, schematically showing the assembly of multiple cable guiding wheels 41 arranged in series for the upper cable 11; the cable guiding wheels 42 for the lower cable 12 are not visible in this view.
  • the cable wheel system 40 comprises three cable guiding wheels 41A, 41B, 41C arranged in series but, within the context of the present invention, this number can also be equal to two or larger than three.
  • the figure illustrates that the axles 45A, 45B, 45C are not located on a straight line, but are arranged according to a curved trajectory with a relatively large radius of curvature.
  • the overall cable wheel system 40 thus effectively guides the cable 10 through a bend with a relatively large radius of curvature.
  • the radius of curvature of the cable 10 is locally relatively small, but the cable 10 follows this guiding wheel only over a relatively small angle, which can be smaller as the cable wheel system 40 comprises more cable guiding wheels.
  • the upper cable is driven at a first pylon while the lower cable is driven at a second pylon.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Motorcycle And Bicycle Frame (AREA)
  • Bridges Or Land Bridges (AREA)
EP06017900A 2005-08-26 2006-08-28 Parcours à câbles pour le ski nautique Withdrawn EP1757338A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL1029813A NL1029813C1 (nl) 2005-08-26 2005-08-26 Kabelwaterskibaan.

Publications (2)

Publication Number Publication Date
EP1757338A2 true EP1757338A2 (fr) 2007-02-28
EP1757338A3 EP1757338A3 (fr) 2008-02-13

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06017900A Withdrawn EP1757338A3 (fr) 2005-08-26 2006-08-28 Parcours à câbles pour le ski nautique

Country Status (2)

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EP (1) EP1757338A3 (fr)
NL (1) NL1029813C1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3333038A1 (fr) * 2016-12-07 2018-06-13 Wakeparx GmbH Installation de remorquage pour sports aquatiques

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3071083A (en) * 1959-09-21 1963-01-01 Hochmuth Sepp Monocable aerial ropeway
FR1325878A (fr) * 1961-04-05 1963-05-03 Installation avec un organe de traction commandé sans fin
FR2338829A1 (fr) * 1976-01-21 1977-08-19 Kupfer L Et P Installation de transport a cable, notamment telecabine ou telesiege
US4523525A (en) * 1981-11-30 1985-06-18 C & I Joint Venture Water skiing tow system
DE19614992A1 (de) * 1996-04-16 1997-10-23 Rixen Bruno Vorrichtung an Magazinen für Doppelladung von Schleppleinen, besonders für Wasserski-Seilbahnen

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3071083A (en) * 1959-09-21 1963-01-01 Hochmuth Sepp Monocable aerial ropeway
FR1325878A (fr) * 1961-04-05 1963-05-03 Installation avec un organe de traction commandé sans fin
FR2338829A1 (fr) * 1976-01-21 1977-08-19 Kupfer L Et P Installation de transport a cable, notamment telecabine ou telesiege
US4523525A (en) * 1981-11-30 1985-06-18 C & I Joint Venture Water skiing tow system
DE19614992A1 (de) * 1996-04-16 1997-10-23 Rixen Bruno Vorrichtung an Magazinen für Doppelladung von Schleppleinen, besonders für Wasserski-Seilbahnen

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3333038A1 (fr) * 2016-12-07 2018-06-13 Wakeparx GmbH Installation de remorquage pour sports aquatiques

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Publication number Publication date
NL1029813C1 (nl) 2007-02-27
EP1757338A3 (fr) 2008-02-13

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