EP4238394B1 - Potential equalisation of a moving cable of a cable-drawn conveying device - Google Patents

Potential equalisation of a moving cable of a cable-drawn conveying device Download PDF

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Publication number
EP4238394B1
EP4238394B1 EP21801077.5A EP21801077A EP4238394B1 EP 4238394 B1 EP4238394 B1 EP 4238394B1 EP 21801077 A EP21801077 A EP 21801077A EP 4238394 B1 EP4238394 B1 EP 4238394B1
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EP
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Prior art keywords
cable
potential
rope
electrically conductive
bristle
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EP21801077.5A
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German (de)
French (fr)
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EP4238394A1 (en
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Lothar Schmidt
Markus Bischofberger
Antonie IHLN
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Innova Patent GmbH
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Innova Patent GmbH
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05F—STATIC ELECTRICITY; NATURALLY-OCCURRING ELECTRICITY
    • H05F3/00—Carrying-off electrostatic charges
    • H05F3/02—Carrying-off electrostatic charges by means of earthing connections
    • 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

Definitions

  • the present invention relates to an arrangement for equalizing the potential of a moving cable of a cable-pulled conveyor device with a defined electrical reference potential of the cable-pulled conveyor device, with a potential equalization unit being provided, with at least one brush body and with at least one electrically conductive contact bristle arranged therein, the potential equalization unit being relative to the moving cable is arranged to enable potential equalization between the at least one electrically conductive contact bristle and the moving rope and the at least one electrically conductive contact bristle is electrically connected to at least one potential point with the electrical reference potential and wherein the at least one contact bristle is designed to be elastic and the at least an elastic and electrically conductive contact bristle electrically contacts the moving rope.
  • JP S60-85080 U discloses such an arrangement for potential equalization, but without going into details of the contact bristle.
  • the contact bristles can also damage the surface of the rope of the rope-pulled conveyor.
  • Cable-pulled conveyors such as cable cars, elevators, etc.
  • cables usually made of steel or a combination of steel and plastic
  • a rope of the rope-pulled conveyor device can be designed as a support rope and be tightly tensioned between two points, for example two cable car stations.
  • a rope of the rope-pulled conveyor device can also be designed as a conveyor rope and can be moved, either running back and forth or revolving.
  • rope pulleys for example deflection pulleys of a rotating rope in a cable car station, or rope pulleys, for example a battery of pulleys
  • electrically conductive contact elements such as metallic plates or pins, were used on the running surface of a sheave or pulley, or the running surface, for example in the form of a sheave lining or a roller rubber, was itself designed to be electrically conductive, for example in the form of an electrically conductive plastic.
  • the electrical contact of the conductive elements of the tread was made via the bearing of the pulley or pulley.
  • the rope electrically contacts the conductive elements of the sheave or rope pulley.
  • the disadvantage of this solution is that such electrical contact elements on the running surface wear out quickly and often have to be adjusted so that contact with the rope is maintained. Electrically conductive roller rubber or pulley linings lose their electrical conductivity as they age and therefore also need to be replaced frequently.
  • Rotatably mounted grounding rollers which are in contact with the moving rope and run along with the rope, are also known.
  • the electrical contacting of the grounding rollers occurs via the bearing of the grounding roller.
  • Versions are known as brush rollers with copper brushes on the circumference of the grounding roller or solid rollers with an electrically conductive running surface.
  • Solid rollers have a high running noise. Brush rolls wear out very quickly.
  • the surface of the rope can be damaged by the brush roll brush, especially on steel and plastic ropes.
  • a more serious disadvantage of such grounding rollers is that the bearing of the grounding roller begins to become electrically insulating due to the bearing lubrication above a certain rope speed, which means that the grounding function can no longer be guaranteed.
  • the electrically conductive contact bristle is made of electrically conductive plastic. Due to the elastic contact bristles made of plastic, there is little mechanical stress on the rope.
  • the potential equalization unit only needs to be arranged in such a way that potential equalization is possible.
  • the contact bristles are connected to a potential point of the cable-pulled conveyor device in order to create potential equalization. This can be done directly via the contact bristles or via the brush body. An electric one can also be used Conductors are used, which can simplify the connection to the potential point.
  • the at least one contact bristle is advantageously designed to be elastic and the potential equalization unit is arranged relative to the moving rope in such a way that the at least one elastic and electrically conductive contact bristle electrically contacts the moving rope. Due to the elastic, conductive contact bristles, the potential equalization unit does not have to be actively pressed against the rope. This reduces the mechanical load on the potential equalization unit and the rope. Apart from that, no pressing mechanism is required.
  • the potential equalization unit can also be arranged relative to the moving rope in such a way that the at least one electrically conductive contact bristle is arranged at a distance from the rope.
  • the potential equalization unit is advantageously arranged so that the tip of the at least one contact bristle, or the entire brush pile, faces the rope. In this case, the potential equalization occurs through electrical flashover between the rope and the contact bristle as soon as the electrical potential difference becomes large enough. A certain electrical potential of the rope is accepted and the potential equalization only takes place when this is exceeded.
  • the potential equalization unit is arranged on a holder with which the potential equalization unit is fastened in the cable-pulled conveyor device, and with which the potential equalization unit can be adjusted relative to the holder in order to relative the potential equalization unit to be able to adjust the rope.
  • the potential equalization unit 1 for moving ropes of a rope-pulled conveyor device, as in Fig.1 shown, essentially consists of a brush with at least one brush body 2 and at least one elastic contact bristle 3 made of electrically conductive plastic, such as electrically conductive polyamide.
  • a brush pile made of a large number of elastic contact bristles 3 arranged next to one another and made of electrically conductive plastic is provided.
  • At least one Contact bristle 3 is arranged in the brush body 2. If there are several contact bristles 3, several brush bodies 2 can also be provided.
  • the brush body 2 is preferably designed to be elongated in the direction of the moving rope, particularly in the case of a brush pile.
  • “Elongated” here means that the extent of the brush body 2 is greater in the direction of movement of the moving rope than in the direction transverse to it.
  • the at least one electrically conductive contact bristle 3 can be contacted electrically.
  • an electrical conductor 4 is arranged on the brush body 2, for example screwed on as in Fig. 1 , which is electrically connected to the at least one contact bristles 3.
  • the brush body 2, in which the at least one contact bristle 3 is arranged can be made of an electrically conductive material, such as metal or electrically conductive plastic. This means that the at least one contact bristle 3 can also be contacted electrically via the brush body 2.
  • the electrical conductor 4 for contacting the contact bristle 3 via the brush body 2 can be arranged on the brush body 2.
  • several electrical conductors 4 can also be provided.
  • the potential equalization unit 1 can be arranged on a holder 5, preferably interchangeable, with which the potential equalization unit 1 can be attached to a component of the cable-pulled conveyor device.
  • the at least one brush body 2 can be arranged on the holder 5.
  • the potential equalization unit 1 can be arranged in the area of a moving rope 10, so that electrical potential equalization with the potential equalization unit 1 is made possible.
  • the at least one contact bristle 3 can electrically contact the rope 10, as in Fig.2 shown.
  • the component of the cable-drawn conveyor device on which the potential equalization unit 1 is arranged can be a stationary component, for example a part of a stationary structure (for example a cable car station) of the cable-drawn conveyor device.
  • the component can also be a moving component of the cable-pulled conveyor device, such as a cable car vehicle or an elevator car. In this case, a relative movement between rope 10 and the potential equalization unit 1 may or may not be provided.
  • an electrical connection is provided between the moving component and the potential equalization unit 1 thereon and the potential point 14 of the cable-pulled conveyor device, for example by means of sliding contacts.
  • the cable-pulled conveyor device is a cable car
  • the cable car vehicle is often disconnected from the cable 10 in the cable car station.
  • the potential equalization unit 1 which is arranged on the cable car vehicle outside the cable car station, is separated from the cable car vehicle in the cable car station and remains on the rope 10. A relative movement between the rope 10 and the potential equalization unit 1 can also be provided.
  • the potential equalization unit 1 can also be arranged to be adjustable relative to the holder 5 (as in Fig.2 indicated by the double arrows) in order to be able to align the potential equalization unit 1 relative to the rope 10 when in use. Any adjustability in space, both linear and rotary, can be provided.
  • the potential equalization unit 1 can also be arranged permanently (but preferably interchangeably) on the holder 5.
  • the potential equalization unit 1, and thus also the at least one brush body 2 with the at least one contact bristle 3, can be arranged stationary relative to the moving rope 10.
  • the potential equalization unit 1 can also be arranged movably in the cable-pulled conveyor device, for example on a moving component of the cable-pulled conveyor device.
  • the at least one contact bristle 3 is arranged facing the rope 10.
  • the distance between the at least one brush body 2, or the at least one contact bristle 3, and the rope 10 can be selected such that the at least one elastic contact bristle 3 nestles against the rope 10 in order to produce good electrical contact. Since the contact bristle 3 is pressed against the rope 10 solely due to the elasticity of the contact bristle 3 itself, there is only very little wear on the contact bristle 3 and a low mechanical load on the rope 10. Apart from that, it does not matter if some of the contact bristles 3 are stronger wear out, since in the case of a contact pile there are always enough contact bristles 3 in electrical contact with the rope 10. In this case, not all contact bristles 3 always have to contact the rope 10 electrically.
  • the potential equalization unit 1 Due to the elastic contact bristle 3, it is also not necessary for the potential equalization unit 1 to be pressed against the rope 10, for example by means of a spring or another pressing mechanism.
  • the potential equalization unit 1 therefore preferably does not include any movable components and can therefore be constructed very simply.
  • the grounding brush 1 can therefore also be used in particular with a rope 10 made of steel and plastic, such as in Fig.4 shown, or only made of plastic.
  • the rope 10 shown includes a rope core 13 (made of steel and/or plastic), several strands 11 consisting of individual wires, and inserts 12 made of plastic, which are twisted to form the rope 10.
  • the inserts 12 made of plastic are not damaged on the surface by a potential equalization unit 1 according to the invention.
  • the electrical conductor 4 can connect the at least one electrically conductive contact bristle 3, for example via the brush body 2, to a potential point 14 with a defined electrical reference potential, wherein the reference potential can be earth or any other electrical potential.
  • the reference potential can be earth or any other electrical potential.
  • several such potential points 14 with reference potential can also be provided in the cable-pulled conveyor device.
  • the electrical connection does not necessarily have to be made through such a conductor 4.
  • the potential point 14 can, for example, be any component of the cable-pulled conveyor device that is at reference potential (e.g. grounded), for example in a cable car station. If the at least one contact bristle 3 is electrically conductively connected to the at least one brush body 2, then the brush body 2 can also be arranged directly on a component of the cable-pulled conveyor device that is at the reference potential.
  • the potential equalization unit 1 can be arranged at any position in the area of the rope 10.
  • the potential equalization unit 1 is preferably arranged in such a way that the at least one contact bristle 3 is aligned from top to bottom and preferably rests against the rope 10. This means that, particularly with a brush pile, dirt cannot easily accumulate between the contact bristles 3.
  • Fig.3 possible advantageous positions of the potential equalization unit 1 in the area of the rope 10 are shown.
  • a heating device (not shown) can also be provided on the potential equalization unit 1 in order to counteract icing of the potential equalization unit 1, in particular the at least one contact bristle 3. This is particularly advantageous for a cable-drawn conveyor device that is subject to external environmental conditions is exposed, such as a cable car.
  • the heating device can be designed electrically, for example.

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  • Engineering & Computer Science (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Elimination Of Static Electricity (AREA)

Description

Die gegenständliche Erfindung betrifft eine Anordnung zum Potentialausgleich eines bewegten Seiles einer seilgezogenen Fördereinrichtung mit einem definierten elektrischen Bezugspotential der seilgezogenen Fördereinrichtung, wobei eine Potentialausgleichseinheit vorgesehen ist, mit zumindest einem Bürstenkörper und mit zumindest einer darin angeordneten elektrisch leitfähigen Kontaktborste, wobei die Potentialausgleichseinheit relativ zum bewegten Seil angeordnet ist, um einen Potentialausgleich zwischen der zumindest einen elektrisch leitfähigen Kontaktborste und dem bewegten Seil zu ermöglichen und die zumindest eine elektrisch leitfähige Kontaktborste mit zumindest einem Potentialpunkt mit dem elektrischen Bezugspotential elektrisch leitend verbunden ist und wobei die zumindest eine Kontaktborste elastisch ausgeführt ist und die zumindest eine elastische und elektrisch leitfähige Kontaktborste das bewegte Seil elektrisch kontaktiert.The present invention relates to an arrangement for equalizing the potential of a moving cable of a cable-pulled conveyor device with a defined electrical reference potential of the cable-pulled conveyor device, with a potential equalization unit being provided, with at least one brush body and with at least one electrically conductive contact bristle arranged therein, the potential equalization unit being relative to the moving cable is arranged to enable potential equalization between the at least one electrically conductive contact bristle and the moving rope and the at least one electrically conductive contact bristle is electrically connected to at least one potential point with the electrical reference potential and wherein the at least one contact bristle is designed to be elastic and the at least an elastic and electrically conductive contact bristle electrically contacts the moving rope.

Auch das Dokument JP S60-85080 U offenbart eine solche Anordnung zum Potentialausgleich, ohne aber auf Details der Kontaktborste einzugehen. Die Kontaktborsten können zudem die Oberfläche des Seils der seilgezogenen Fördereinrichtung beschädigen.Also the document JP S60-85080 U discloses such an arrangement for potential equalization, but without going into details of the contact bristle. The contact bristles can also damage the surface of the rope of the rope-pulled conveyor.

Seilgezogene Fördereinrichtungen, wie beispielsweise Seilbahnen, Aufzüge usw., verwenden Seile, üblicherweise aus Stahl oder einer Kombination aus Stahl und Kunststoff, zur Beförderung einer Fördereinheit, z.B. von Seilbahnfahrzeug, in der Regel zwischen zwei oder mehr Seilbahnstationen. Auch reine Kunststoffseile kommen grundsätzlich in Frage. Ein Seil der seilgezogenen Fördereinrichtung kann als Tragseil ausgeführt sein und fest zwischen zwei Punkten, beispielsweise zwei Seilbahnstationen, gespannt sein. Ein Seil der seilgezogenen Fördereinrichtung kann aber auch als Förderseil ausgeführt sein und kann bewegt sein, entweder hin und herlaufend oder umlaufend. Mit einem Seil in Form eines Förderseils werden beispielsweise die Seilbahnfahrzeuge oder eine Aufzugskabine bewegt, entweder indem die Fördereinheiten Seil fest oder lösbar geklemmt sind oder indem die die Fördereinheiten durch das Seil gezogen werden. Aus Sicherheitsgründen müssen Seile elektrisch geerdet sein, um eine mögliche elektrische Ladung des Seiles, beispielsweise durch elektrostatische Aufladung, Blitzschlag, Einkopplung von elektrischen Strömen durch elektrische Felder usw., sicher abzuleiten. Eine elektrische Aufladung des Seiles kann grundsätzlich auch dann auftreten, wenn das Seil selbst nicht elektrisch leitend ausgeführt ist. Bei fest gespannten Seilen ist ein solcher Potentialausgleich zu einem definierten Bezugspotential, beispielsweise Erde, einfach zu realisieren, weil das Seil sicher kontaktiert werden kann, beispielsweise mittels Kontaktklemmen. Bei bewegten Seilen ist der Potentialausgleich hingegen schwierig, weil das bewegte Seil zum Potentialausgleich sicher und dauerhaft elektrisch kontaktiert werden muss.Cable-pulled conveyors, such as cable cars, elevators, etc., use cables, usually made of steel or a combination of steel and plastic, to transport a conveyor unit, for example a cable car vehicle, usually between two or more cable car stations. Pure plastic ropes are also fundamentally possible. A rope of the rope-pulled conveyor device can be designed as a support rope and be tightly tensioned between two points, for example two cable car stations. A rope of the rope-pulled conveyor device can also be designed as a conveyor rope and can be moved, either running back and forth or revolving. With a rope in the form of a conveyor rope, for example, the cable car vehicles or an elevator car are moved, either by the conveyor units being clamped firmly or releasably on the rope or by the conveyor units being pulled through the rope. For safety reasons, ropes must be electrically grounded in order to safely dissipate any possible electrical charge on the rope, for example due to electrostatic charging, lightning strikes, coupling of electrical currents through electrical fields, etc. In principle, an electrical charge on the rope can occur even if the rope itself is not designed to be electrically conductive. With tightly tensioned ropes, such potential equalization to a defined reference potential, for example earth, is easy to implement because the rope can be contacted securely, for example by means of contact clamps. With moving ropes, however, potential equalization is difficult because the moving rope must be safely and permanently electrically contacted to equalize the potential.

Bisher wurden zur Erdung bewegter Seile häufig Seilscheiben, beispielsweise Umlenkscheiben eines umlaufenden Seils in einer Seilbahnstation, oder Seilrollen, beispielsweise einer Rollenbatterie, elektrisch leitend ausgeführt. Beispielsweise wurden elektrisch leitende Kontaktelemente, wie z.B. metallische Plättchen oder Stifte, an der Lauffläche einer Seilscheibe oder Seilrolle verwendet oder es wurde die Lauffläche, z.B. in Form einer Seilscheibenfutters oder eines Rollengummis, selbst elektrische leitend ausgeführt, beispielsweise in Form eines elektrisch leitfähigen Kunststoffes. Die elektrische Kontaktierung der leitfähigen Elemente der Lauffläche erfolgte über die Lagerung der Seilscheibe oder Seilrolle. Zur Herstellung einer elektrischen Kontaktierung ist vorgesehen, dass das Seil die leitfähigen Elemente der Seilscheibe oder Seilrolle elektrisch leitend kontaktiert. Der Nachteil diese Lösung ist darin zu sehen, dass solche elektrische Kontaktelemente an der Lauffläche rasch verschleißen und oftmals nachgestellt werden müssen, damit der Kontakt zum Seil beibehalten wird. Elektrisch leitfähige Rollengummi oder Seilscheibenfutter verlieren mit der Alterung die elektrische Leitfähigkeit und müssen daher ebenfalls häufig ersetzt werden.Previously, to ground moving ropes, rope pulleys, for example deflection pulleys of a rotating rope in a cable car station, or rope pulleys, for example a battery of pulleys, were often designed to be electrically conductive. For example, electrically conductive contact elements, such as metallic plates or pins, were used on the running surface of a sheave or pulley, or the running surface, for example in the form of a sheave lining or a roller rubber, was itself designed to be electrically conductive, for example in the form of an electrically conductive plastic. The electrical contact of the conductive elements of the tread was made via the bearing of the pulley or pulley. To produce electrical contact, it is provided that the rope electrically contacts the conductive elements of the sheave or rope pulley. The disadvantage of this solution is that such electrical contact elements on the running surface wear out quickly and often have to be adjusted so that contact with the rope is maintained. Electrically conductive roller rubber or pulley linings lose their electrical conductivity as they age and therefore also need to be replaced frequently.

Ebenso bekannt sind drehbar gelagerte Erdungsrollen, die in Kontakt mit dem bewegten Seil stehen und mit dem Seil mitlaufen. Die elektrische Kontaktierung der Erdungsrollen erfolgt über die Lagerung der Erdungsrolle. Bekannt sind Ausführungen als Bürstenrollen mit Kupferbürsten am Umfang der Erdungsrolle oder Vollrollen mit einer elektrisch leitfähigen Lauffläche. Vollrollen weisen ein hohes Laufgeräusch auf. Bürstenrollen verschleißen sehr schnell. Außerdem kann die Oberfläche des Seils durch die Bürste der Bürstenrolle beschädigt werden, insbesondere bei Seilen aus Stahl und Kunststoff. Ein gravierenderer Nachteil solcher Erdungsrollen liegt aber darin, dass die Lagerung der Erdungsrolle aufgrund der Lagerschmierung ab einer bestimmten Seilgeschwindigkeit beginnt elektrisch isolierend zu werden, womit die Erdungsfunktion nicht mehr gewährleistet werden kann.Rotatably mounted grounding rollers, which are in contact with the moving rope and run along with the rope, are also known. The electrical contacting of the grounding rollers occurs via the bearing of the grounding roller. Versions are known as brush rollers with copper brushes on the circumference of the grounding roller or solid rollers with an electrically conductive running surface. Solid rollers have a high running noise. Brush rolls wear out very quickly. In addition, the surface of the rope can be damaged by the brush roll brush, especially on steel and plastic ropes. However, a more serious disadvantage of such grounding rollers is that the bearing of the grounding roller begins to become electrically insulating due to the bearing lubrication above a certain rope speed, which means that the grounding function can no longer be guaranteed.

Bekannt sind auch feststehende flächige Schleifkontakte aus elektrisch leitfähigem Material, die gegen ein bewegtes Seil gedrückt werden. Die WO 2018/150149 A1 zeigt beispielsweise einen solchen Schleifkontakt aus einer Mischung aus Kupfer und Kohlenstoff. Auch bei solchen Schleifkontakten ist der Nachteil im Verschleiß des Schleifelements zu sehen. Abgesehen davon muss das Schleifelement gegen das Seil gedrückt werden, um eine hinreichende und sichere elektrische Kontaktierung zu erzielen, was eine zusätzliche Andrückvorrichtung mit bewegten Bauteilen erforderlich macht.Fixed flat sliding contacts made of electrically conductive material, which are pressed against a moving rope, are also known. The WO 2018/150149 A1 shows, for example, such a sliding contact made of a mixture of copper and carbon. Even with such sliding contacts, the disadvantage is the wear of the grinding element. Apart from that, the grinding element must be pressed against the rope in order to achieve sufficient and secure electrical contact, which requires an additional pressing device with moving components.

Es ist eine Aufgabe der gegenständlichen Erfindung, einen elektrischen Potentialausgleich eines bewegten Seiles anzugeben, mit der die oben genannten Nachteile behoben werden können.It is an object of the present invention to provide an electrical potential equalization of a moving rope with which the above-mentioned disadvantages can be eliminated.

Diese Aufgabe wird dadurch gelöst, indem die elektrisch leitfähige Kontaktborste aus elektrisch leitfähigem Kunststoff gefertigt ist. Aufgrund der elastischen Kontaktborsten aus Kunststoff ergibt sich eine geringe mechanische Belastung des Seils.This task is solved in that the electrically conductive contact bristle is made of electrically conductive plastic. Due to the elastic contact bristles made of plastic, there is little mechanical stress on the rope.

Ein derartiger Potentialausgleich ist überaus einfach im Aufbau und in der Anwendung. Die Potentialausgleichseinheit ist lediglich so anzuordnen, dass der Potentialausgleich ermöglicht wird. Die Kontaktborsten werden mit einem Potentialpunkt der seilgezogenen Fördereinrichtung verbunden, um den Potentialausgleich herzustellen. Das kann direkt über die Kontaktborsten, oder über den Bürstenkörper erfolgen. Dazu kann auch ein elektrischer Leiter verendet werden, wodurch die Verbindung zum Potentialpunkt vereinfacht werden kann.Such potential equalization is extremely simple to set up and use. The potential equalization unit only needs to be arranged in such a way that potential equalization is possible. The contact bristles are connected to a potential point of the cable-pulled conveyor device in order to create potential equalization. This can be done directly via the contact bristles or via the brush body. An electric one can also be used Conductors are used, which can simplify the connection to the potential point.

Die zumindest eine Kontaktborste ist vorteilhafterweise elastisch ausgeführt und die Potentialausgleichseinheit ist relativ zum bewegten Seil so angeordnet, dass die zumindest eine elastische und elektrisch leitfähige Kontaktborste das bewegte Seil elektrisch kontaktiert. Aufgrund der elastischen, leitfähigen Kontaktborsten muss die Potentialausgleichseinheit nicht aktiv gegen das Seil gedrückt werden. Das reduziert die mechanische Belastung der Potentialausgleichseinheit, als auch des Seiles. Abgesehen davon ist kein Andrückmechanismus erforderlich. Die Potentialausgleichseinheit kann aber relativ zum bewegten Seil auch so angeordnet werden, dass die zumindest eine elektrisch leitfähige Kontaktborste beabstandet vom Seil angeordnet ist. Die Potentialausgleichseinheit wird dabei vorteilhaft so angeordnet, dass die Spitze der zumindest einen Kontaktborste, oder der ganze Bürstenflor, dem Seil zugewandt ist. In diesem Fall erfolgt der Potentialausgleich durch elektrischen Überschlag zwischen Seil und Kontaktborste, sobald die elektrische Potentialdifferenz groß genug wird. Dabei wird also ein bestimmtes elektrisches Potential des Seils akzeptiert und der Potentialausgleich erst dann erfolgen, wenn dieses überschritten wird.The at least one contact bristle is advantageously designed to be elastic and the potential equalization unit is arranged relative to the moving rope in such a way that the at least one elastic and electrically conductive contact bristle electrically contacts the moving rope. Due to the elastic, conductive contact bristles, the potential equalization unit does not have to be actively pressed against the rope. This reduces the mechanical load on the potential equalization unit and the rope. Apart from that, no pressing mechanism is required. However, the potential equalization unit can also be arranged relative to the moving rope in such a way that the at least one electrically conductive contact bristle is arranged at a distance from the rope. The potential equalization unit is advantageously arranged so that the tip of the at least one contact bristle, or the entire brush pile, faces the rope. In this case, the potential equalization occurs through electrical flashover between the rope and the contact bristle as soon as the electrical potential difference becomes large enough. A certain electrical potential of the rope is accepted and the potential equalization only takes place when this is exceeded.

Um die Potentialausgleichseinheit einfach relativ zum Seil ausrichten zu können, ist vorteilhafterweise vorgesehen, dass die Potentialausgleichseinheit an einer Halterung angeordnet ist, mit der die Potentialausgleichseinheit in der seilgezogenen Fördereinrichtung befestigt ist, und mit der die Potentialausgleichseinheit relativ zur Halterung verstellbar ist, um die Potentialausgleichseinheit relativ zum Seil verstellen zu können.In order to be able to easily align the potential equalization unit relative to the cable, it is advantageously provided that the potential equalization unit is arranged on a holder with which the potential equalization unit is fastened in the cable-pulled conveyor device, and with which the potential equalization unit can be adjusted relative to the holder in order to relative the potential equalization unit to be able to adjust the rope.

Die gegenständliche Erfindung wird nachfolgend unter Bezugnahme auf die Figuren 1 bis 4 näher erläutert, die beispielhaft, schematisch und nicht einschränkend vorteilhafte Ausgestaltungen der Erfindung zeigen. Dabei zeigt

  • Fig.1 eine erfindungsgemäße Potentialausgleichseinheit an einer Halterung,
  • Fig.2 eine Anordnung der Potentialausgleichseinheit in einer seilgezogenen Fördereinrichtung,
  • Fig.3 mögliche Anordnungen der Potentialausgleichseinheit relativ zum Seil und
  • Fig.4 ein Seil mit Einlagen aus Kunststoff.
The present invention is described below with reference to Figures 1 to 4 explained in more detail, which show exemplary, schematic and non-restrictive advantageous embodiments of the invention. This shows
  • Fig.1 a potential equalization unit according to the invention on a holder,
  • Fig.2 an arrangement of the potential equalization unit in a cable-pulled conveyor device,
  • Fig.3 possible arrangements of the potential equalization unit relative to the rope and
  • Fig.4 a rope with plastic inserts.

Die erfindungsgemäße Potentialausgleichseinheit 1 für bewegte Seile einer seilgezogenen Fördereinrichtung, wie in Fig.1 dargestellt, besteht im Wesentlichen aus einer Bürste mit zumindest einem Bürstenkörper 2 und zumindest einer elastischen Kontaktborste 3 aus elektrisch leitfähigem Kunststoff, wie beispielsweise elektrisch leitfähiges Polyamid. In der Regel ist ein Bürstenflor aus einer Vielzahl nebeneinander angeordneter elastischer Kontaktborsten 3 aus elektrisch leitfähigem Kunststoff vorgesehen. Die zumindest eine Kontaktborste 3 ist im Bürstenkörper 2 angeordnet. Bei mehreren Kontaktborsten 3 können auch mehrere Bürstenkörper 2 vorgesehen sein. Der Bürstenkörper 2 ist vorzugsweise in Richtung des bewegten Seiles längsgestreckt ausgeführt, insbesondere im Falle eines Bürstenflors. "Längsgestreckt" bedeutet hierbei, dass die Erstreckung des Bürstenkörpers 2 in Bewegungsrichtung des bewegten Seils größer ist, als quer dazu. Die zumindest eine elektrisch leitfähige Kontaktborste 3 kann elektrisch kontaktiert werden. Beispielsweise ist am Bürstenkörper 2 ein elektrischer Leiter 4 angeordnet, beispielsweise angeschraubt wie in Fig. 1, der mit der zumindest einen Kontaktborsten 3 elektrisch leitend verbunden ist. Beispielsweise kann der Bürstenkörper 2, in dem die zumindest eine Kontaktborste 3 angeordnet ist, aus einem elektrisch leitfähigen Material, wie beispielsweise Metall oder elektrisch leitfähiger Kunststoff, gefertigt sein. Damit kann die zumindest eine Kontaktborste 3 auch über den Bürstenkörper 2 elektrisch kontaktiert werden. Auch in dieser Ausführung kann am Bürstenkörper 2 der elektrische Leiter 4 zur Kontaktierung der Kontaktborste 3 über den Bürstenkörper 2 angeordnet sein. Natürlich können auch mehrere elektrische Leiter 4 vorgesehen sein.The potential equalization unit 1 according to the invention for moving ropes of a rope-pulled conveyor device, as in Fig.1 shown, essentially consists of a brush with at least one brush body 2 and at least one elastic contact bristle 3 made of electrically conductive plastic, such as electrically conductive polyamide. As a rule, a brush pile made of a large number of elastic contact bristles 3 arranged next to one another and made of electrically conductive plastic is provided. At least one Contact bristle 3 is arranged in the brush body 2. If there are several contact bristles 3, several brush bodies 2 can also be provided. The brush body 2 is preferably designed to be elongated in the direction of the moving rope, particularly in the case of a brush pile. “Elongated” here means that the extent of the brush body 2 is greater in the direction of movement of the moving rope than in the direction transverse to it. The at least one electrically conductive contact bristle 3 can be contacted electrically. For example, an electrical conductor 4 is arranged on the brush body 2, for example screwed on as in Fig. 1 , which is electrically connected to the at least one contact bristles 3. For example, the brush body 2, in which the at least one contact bristle 3 is arranged, can be made of an electrically conductive material, such as metal or electrically conductive plastic. This means that the at least one contact bristle 3 can also be contacted electrically via the brush body 2. In this embodiment too, the electrical conductor 4 for contacting the contact bristle 3 via the brush body 2 can be arranged on the brush body 2. Of course, several electrical conductors 4 can also be provided.

Die Potentialausgleichseinheit 1 kann an einer Halterung 5 angeordnet sein, vorzugsweise austauschbar, mit der die Potentialausgleichseinheit 1 an einem Bauteil der seilgezogenen Fördereinrichtung befestigt werden kann. Dazu kann beispielsweise der zumindest eine Bürstenkörper 2 an der Halterung 5 angeordnet sein. Mittels der Halterung 5 kann die Potentialausgleichseinheit 1 im Bereich eines bewegten Seiles 10 angeordnet werden, sodass der elektrische Potentialausgleich mit der Potentialausgleichseinheit 1 ermöglicht wird. Dazu kann die zumindest eine Kontaktborste 3 das Seil 10 elektrisch kontaktieren, wie in Fig.2 dargestellt.The potential equalization unit 1 can be arranged on a holder 5, preferably interchangeable, with which the potential equalization unit 1 can be attached to a component of the cable-pulled conveyor device. For this purpose, for example, the at least one brush body 2 can be arranged on the holder 5. By means of the holder 5, the potential equalization unit 1 can be arranged in the area of a moving rope 10, so that electrical potential equalization with the potential equalization unit 1 is made possible. For this purpose, the at least one contact bristle 3 can electrically contact the rope 10, as in Fig.2 shown.

Der Bauteil der seilgezogenen Fördereinrichtung, an der die Potentialausgleichseinheit 1 angeordnet ist, kann ein ortsfester Bauteil sein, beispielsweise ein Teil einer ortsfesten Konstruktion (beispielsweise einer Seilbahnstation) der seilgezogenen Fördereinrichtung. Der Bauteil kann aber auch ein bewegter Bauteil der seilgezogenen Fördereinrichtung sein, wie beispielsweise ein Seilbahnfahrzeug oder eine Aufzugskabine. In diesem Fall kann eine Relativbewegung zwischen Seil 10 und der Potentialausgleichseinheit 1 vorgesehen sein, oder auch nicht. Im Falle eines bewegten Bauteils ist eine elektrische Verbindung zwischen dem bewegten Bauteil und der Potentialausgleichseinheit 1 darauf und dem Potentialpunkt 14 der seilgezogenen Fördereinrichtung vorgesehen, beispielsweise mittels Schleifkontakte.The component of the cable-drawn conveyor device on which the potential equalization unit 1 is arranged can be a stationary component, for example a part of a stationary structure (for example a cable car station) of the cable-drawn conveyor device. The component can also be a moving component of the cable-pulled conveyor device, such as a cable car vehicle or an elevator car. In this case, a relative movement between rope 10 and the potential equalization unit 1 may or may not be provided. In the case of a moving component, an electrical connection is provided between the moving component and the potential equalization unit 1 thereon and the potential point 14 of the cable-pulled conveyor device, for example by means of sliding contacts.

Wenn die seilgezogene Fördereinrichtung eine Seilbahn ist, dann werden Seilbahnfahrzeug in der Seilbahnstation oftmals vom Seil 10 abgeklemmt. In diesem Fall kann vorgesehen sein, dass die Potentialausgleichseinheit 1, die außerhalb der Seilbahnstation am Seilbahnfahrzeug angeordnet ist, in der Seilbahnstation vom Seilbahnfahrzeug getrennt wird und am Seil 10 verbleibt. Dabei kann auch eine Relativbewegung zwischen dem Seil 10 und der Potentialausgleichseinheit 1 vorgesehen sein.If the cable-pulled conveyor device is a cable car, then the cable car vehicle is often disconnected from the cable 10 in the cable car station. In this case, it can be provided that the potential equalization unit 1, which is arranged on the cable car vehicle outside the cable car station, is separated from the cable car vehicle in the cable car station and remains on the rope 10. A relative movement between the rope 10 and the potential equalization unit 1 can also be provided.

Die Potentialausgleichseinheit 1 kann auch relativ zur Halterung 5 verstellbar angeordnet sein (wie in Fig.2 durch die Doppelpfeile angedeutet), um die Potentialausgleichseinheit 1 bei Verwendung relativ zum Seil 10 ausrichten zu können. Es kann eine beliebige Verstellbarkeit im Raum, sowohl linear als auch rotativ, vorgesehen sein. Die Potentialausgleichseinheit 1 kann aber auch fix (aber vorzugsweise austauschbar) an der Halterung 5 angeordnet sein. Die Potentialausgleichseinheit 1, und damit auch der zumindest eine Bürstenkörper 2 mit der zumindest einen Kontaktborste 3, kann relativ zum bewegten Seil 10 ortsfest angeordnet sein. Die Potentialausgleichseinheit 1 kann aber in der seilgezogenen Fördereinrichtung auch beweglich angeordnet sein, beispielsweise an einem bewegten Bauteil der seilgezogenen Fördereinrichtung.The potential equalization unit 1 can also be arranged to be adjustable relative to the holder 5 (as in Fig.2 indicated by the double arrows) in order to be able to align the potential equalization unit 1 relative to the rope 10 when in use. Any adjustability in space, both linear and rotary, can be provided. The potential equalization unit 1 can also be arranged permanently (but preferably interchangeably) on the holder 5. The potential equalization unit 1, and thus also the at least one brush body 2 with the at least one contact bristle 3, can be arranged stationary relative to the moving rope 10. However, the potential equalization unit 1 can also be arranged movably in the cable-pulled conveyor device, for example on a moving component of the cable-pulled conveyor device.

Die zumindest eine Kontaktborste 3 ist dem Seil 10 zugewandt angeordnet. Der Abstand zwischen dem zumindest einen Bürstenkörper 2, bzw. der zumindest einen Kontaktborste 3, und dem Seil 10 kann so gewählt sein, dass sich die zumindest eine elastische Kontaktborste 3 an das Seil 10 anschmiegen, um eine gute elektrische Kontaktierung herzustellen. Nachdem die Kontaktborste 3 lediglich aufgrund der Elastizität der Kontaktborste 3 selbst an das Seil 10 gedrückt wird, ergibt sich nur ein sehr geringer Verschleiß der Kontaktborste 3 und eine geringe mechanische Belastung des Seils 10. Abgesehen davon macht es nichts, wenn einige der Kontaktborsten 3 stärker verschleißen, da im Falle eines Kontaktflors immer genügend Kontaktborsten 3 in elektrischen Kontakt mit dem Seil 10 stehen. In diesem Fall müssen auch nicht immer alle Kontaktborsten 3 das Seil 10 elektrisch kontaktieren.The at least one contact bristle 3 is arranged facing the rope 10. The distance between the at least one brush body 2, or the at least one contact bristle 3, and the rope 10 can be selected such that the at least one elastic contact bristle 3 nestles against the rope 10 in order to produce good electrical contact. Since the contact bristle 3 is pressed against the rope 10 solely due to the elasticity of the contact bristle 3 itself, there is only very little wear on the contact bristle 3 and a low mechanical load on the rope 10. Apart from that, it does not matter if some of the contact bristles 3 are stronger wear out, since in the case of a contact pile there are always enough contact bristles 3 in electrical contact with the rope 10. In this case, not all contact bristles 3 always have to contact the rope 10 electrically.

Aufgrund der elastischen Kontaktborste 3 ist es auch nicht erforderlich, dass die Potentialausgleichseinheit 1 gegen das Seil 10 gedrückt wird, beispielsweise mittels einer Feder oder einem anderen Andrückmechanismus. Die Potentialausgleichseinheit 1 umfasst damit vorzugsweise keine beweglichen Bauteile und kann daher sehr einfach aufgebaut sei.Due to the elastic contact bristle 3, it is also not necessary for the potential equalization unit 1 to be pressed against the rope 10, for example by means of a spring or another pressing mechanism. The potential equalization unit 1 therefore preferably does not include any movable components and can therefore be constructed very simply.

Die Erdungsbürste 1 kann damit insbesondere auch mit einem Seil 10 verwendet werden, das aus Stahl und Kunststoff, wie beispielsweise in Fig.4 dargestellt, oder nur aus Kunststoff besteht. Das dargestellte Seil 10 umfasst einen Seilkern 13 (aus Stahl und/oder Kunststoff), mehrere Litzen 11 bestehend aus einzelnen Drähten, sowie Einlagen 12 aus Kunststoff, die zum Seil 10 verdrillt sind. Die Einlagen 12 aus Kunststoff werden durch eine erfindungsgemäße Potentialausgleichseinheit 1 an der Oberfläche nicht beschädigt.The grounding brush 1 can therefore also be used in particular with a rope 10 made of steel and plastic, such as in Fig.4 shown, or only made of plastic. The rope 10 shown includes a rope core 13 (made of steel and/or plastic), several strands 11 consisting of individual wires, and inserts 12 made of plastic, which are twisted to form the rope 10. The inserts 12 made of plastic are not damaged on the surface by a potential equalization unit 1 according to the invention.

Der elektrische Leiter 4 kann die zumindest eine elektrisch leitfähige Kontaktborste 3, beispielsweise über den Bürstenkörper 2, mit einem Potentialpunkt 14 mit definiertem elektrischen Bezugspotential verbinden, wobei das Bezugspotential Erde oder ein beliebiges anderes elektrisches Potential sein kann. Natürlich können in der seilgezogenen Fördereinrichtung auch mehrere solcher Potentialpunkte 14 mit Bezugspotential vorgesehen sein. Die elektrische Verbindung muss aber nicht zwingend durch einen solchen Leiter 4 erfolgen. Der Potentialpunkt 14 kann beispielsweise ein beliebiger, auf Bezugspotential liegender (z.B. geerdeter) Bauteil der seilgezogenen Fördereinrichtung sein, beispielsweise in einer Seilbahnstation. Wenn die zumindest eine Kontaktborste 3 mit dem zumindest einen Bürstenkörper 2 elektrisch leitend verbunden ist, dann kann der Bürstenkörper 2 auch direkt an einem auf dem Bezugspotential liegenden Bauteil der seilgezogenen Fördereinrichtung angeordnet werden.The electrical conductor 4 can connect the at least one electrically conductive contact bristle 3, for example via the brush body 2, to a potential point 14 with a defined electrical reference potential, wherein the reference potential can be earth or any other electrical potential. Of course, several such potential points 14 with reference potential can also be provided in the cable-pulled conveyor device. However, the electrical connection does not necessarily have to be made through such a conductor 4. The potential point 14 can, for example, be any component of the cable-pulled conveyor device that is at reference potential (e.g. grounded), for example in a cable car station. If the at least one contact bristle 3 is electrically conductively connected to the at least one brush body 2, then the brush body 2 can also be arranged directly on a component of the cable-pulled conveyor device that is at the reference potential.

Es kann auch vorgesehen sein, zwischen dem Potentialpunkt 14 und der zumindest einen Kontaktborste 3 einen Widerstand R vorzusehen, wie in Fig.2 angedeutet. Damit kann trotz Potentialausgleich ein gewünschtes Potential des Seils 10 eingestellt werden.It can also be provided to provide a resistor R between the potential point 14 and the at least one contact bristle 3, as in Fig.2 indicated. This means that a desired potential of the rope 10 can be set despite potential equalization.

Grundsätzlich kann die Potentialausgleichseinheit 1 an einer beliebigen Position im Bereich des Seiles 10 angeordnet sein. Vorzugsweise wird die Potentialausgleichseinheit 1 aber so angeordnet, dass die zumindest eine Kontaktborste 3 von oben nach unten ausgerichtet ist, und vorzugsweise gegen das Seil 10 anliegt. Damit kann insbesondere bei einem Bürstenflor erreicht werden, dass sich zwischen den Kontaktborsten 3 nicht so leicht Schmutz ansammeln kann. In Fig.3 sind mögliche vorteilhafte Positionen der Potentialausgleichseinheit 1 im Bereich des Seil 10 dargestellt.In principle, the potential equalization unit 1 can be arranged at any position in the area of the rope 10. However, the potential equalization unit 1 is preferably arranged in such a way that the at least one contact bristle 3 is aligned from top to bottom and preferably rests against the rope 10. This means that, particularly with a brush pile, dirt cannot easily accumulate between the contact bristles 3. In Fig.3 possible advantageous positions of the potential equalization unit 1 in the area of the rope 10 are shown.

Tests haben gezeigt, dass mit einer solchen Potentialausgleichseinheit 1 über einen großen Bereich einer Seilgeschwindigkeit, beispielsweise zwischen 0 und 7m/s wie bei Seilbahnen üblich, ein sicherer und zuverlässiger elektrischer Potentialausgleich des bewegten Seiles 10 erreicht werden kann, bei dem eine elektrische Ladung am Seil 10 abgeführt wird.Tests have shown that with such a potential equalization unit 1 a safe and reliable electrical potential equalization of the moving rope 10 can be achieved over a large range of rope speed, for example between 0 and 7 m/s as is usual in cable cars, in which an electrical charge is present on the rope 10 is discharged.

Es kann an der Potentialausgleichseinheit 1 auch eine (nicht dargestellte) Heizeinrichtung vorgesehen sein, um einer Vereisung der Potentialausgleichseinheit 1, insbesondere der zumindest einen Kontaktborste 3, entgegenzuwirken. Das ist insbesondere bei einer seilgezogenen Fördereinrichtung vorteilhaft, die den äußeren Umgebungsbedingungen ausgesetzt ist, wie beispielsweise einer Seilbahn. Die Heizeinrichtung kann beispielsweise elektrisch ausgeführt sein.A heating device (not shown) can also be provided on the potential equalization unit 1 in order to counteract icing of the potential equalization unit 1, in particular the at least one contact bristle 3. This is particularly advantageous for a cable-drawn conveyor device that is subject to external environmental conditions is exposed, such as a cable car. The heating device can be designed electrically, for example.

Claims (10)

  1. Arrangement for the potential equalisation of a moving cable (10) of a cable-drawn conveying device with a defined electrical reference potential of the cable-drawn conveying device, wherein a potential compensating unit (1) is provided having at least one brush body (2) and having at least one electrically conductive contact bristle (3) arranged therein, the potential compensating unit (1) being arranged relative to the moving cable (10) in order to allow potential equalization between the at least one electrically conductive contact bristle (3) and the moving cable (10), wherein the at least one electrically conductive contact bristle (3) is electrically conductively connected to at least one potential point (14) having the electrical reference potential, and wherein the at least one contact bristle (3) is designed to be resilient and the at least one resilient and electrically conductive contact bristle (3) electrically contacting the moving cable (10),
    characterized in that the electrically conductive contact bristle (3) is made of electrically conductive plastics material.
  2. Arrangement according to claim 1, characterized in that the contact bristle (3) press against the cable (10) merely due to the elasticity itself.
  3. Arrangement according to claim 1, characterized in that the at least one contact bristle (3) is electrically conductively connected to at least one electrical conductor (4), and the at least electrically conductive contact bristle (3) is electrically conductively connected to the at least one potential point (14) of the cable-drawn conveying device via the at least one electrical conductor (4).
  4. Arrangement according to claim 1, characterized in that the at least one brush body (2) is designed to be electrically conductive, and the at least one contact bristle (3) is electrically conductively connected to the at least one brush body (2), and the at least one electrically conductive contact bristle (3) is electrically conductively connected to the at least one potential point (14) of the cable-drawn conveying device via the brush body (2).
  5. Arrangement according to claim 3 and 4, characterized in that the at least one electrical conductor (4) is electrically conductively connected to at least one brush body (2).
  6. Arrangement according to any of claims 1 to 5, characterized in that the potential equalization unit (1) is arranged on a holder (5), the potential equalization unit (1) being fastened in the cable-drawn conveying device via the holder (5).
  7. Arrangement according to claim 6, characterized in that the potential equalization unit (1) is arranged so as to be adjustable relative to the holder (5) in order to align the potential compensating unit (1) relative to the cable.
  8. Arrangement according to claim 6, characterized in that the holder (5) is arranged on a stationary or moving component of the cable-drawn conveying device.
  9. Arrangement according to any of claims 1 to 7, characterized in that an electrical resistor (R) is provided between the at least one electrically conductive contact bristle (3) and the potential point (14).
  10. Arrangement according to any of claims 1 to 9, characterized in that a heating device is provided on the potential compensating unit (1).
EP21801077.5A 2020-10-27 2021-10-25 Potential equalisation of a moving cable of a cable-drawn conveying device Active EP4238394B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATA50927/2020A AT524407A1 (en) 2020-10-27 2020-10-27 Equipotential bonding of a moving rope of a rope-pulled conveyor
PCT/EP2021/079563 WO2022090166A1 (en) 2020-10-27 2021-10-25 Potential equalisation of a moving cable of a cable-drawn conveying device

Publications (2)

Publication Number Publication Date
EP4238394A1 EP4238394A1 (en) 2023-09-06
EP4238394B1 true EP4238394B1 (en) 2024-02-21

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EP21801077.5A Active EP4238394B1 (en) 2020-10-27 2021-10-25 Potential equalisation of a moving cable of a cable-drawn conveying device

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EP (1) EP4238394B1 (en)
JP (1) JP2023553242A (en)
AT (1) AT524407A1 (en)
ES (1) ES2976041T3 (en)
WO (1) WO2022090166A1 (en)

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6085080U (en) * 1983-11-18 1985-06-12 株式会社　明輝電機製作所 Movable rope grounding mechanism
US5010441A (en) * 1990-01-24 1991-04-23 Xerox Corporation Grounding brush
US7528513B2 (en) * 2005-08-17 2009-05-05 Illinois Tool Works Inc. Shaft current control brush assembly with drainage
US9799988B2 (en) * 2015-05-01 2017-10-24 Illinois Tool Works Inc. Apparatus for establishing an electrical contact with a target surface
JPWO2017109901A1 (en) * 2015-12-24 2018-10-11 堺ディスプレイプロダクト株式会社 Static elimination brush, static elimination device and static elimination method
FR3063199B1 (en) 2017-02-17 2021-12-03 Mersen France Amiens Sas EARTHING DEVICE FOR A CABLE BELONGING TO A CABLE TRANSPORT SYSTEM

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Publication number Publication date
JP2023553242A (en) 2023-12-21
AT524407A1 (en) 2022-05-15
ES2976041T3 (en) 2024-07-22
WO2022090166A1 (en) 2022-05-05
EP4238394A1 (en) 2023-09-06

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