EP1953062A1 - Device and method for monitoring the position of a cable in a cable transport installation - Google Patents

Abstract

The device (48) has a movement parameter acquiring device (50) for determining movement parameters of cable pulleys (22, 40, 42) and a reference pulley (46). An evaluation device (70) compares the movement parameters and determines a movement parameter difference, which corresponds to an operational reliability condition of a cable-driven transport system (10). A movement parameter detecting device determines displacement of a cable (12) in the pulleys from an idle position based on the difference. Independent claims are also included for the following: (1) a cable-driven transport system comprising a drive (2) a method for monitoring position of a cable.

Description

The present invention relates to a rope layer monitoring device for monitoring the position of a rope guided in rollers of a roller assembly in at least one first cable pulley to be monitored, comprising the roller assembly comprising a cable-operated transport system comprising at least one first and at least one second pulley defining a reference roller.

Furthermore, the present invention relates to a cable-driven transport system comprising a cable, a drive for moving the cable and at least one roller arrangement for guiding the cable, wherein the at least one roller assembly comprises at least a first pulley and at least one second pulley defining a reference roller, wherein further Seillage monitoring device is provided for monitoring at least the position of the guided in the at least one first pulley rope.

Furthermore, the present invention relates to a method for monitoring the position of a guided in roles of a roller assembly rope in at least one first to be monitored pulley comprising at least a first and at least a second, a reference role defining pulley roller assembly of a cable-driven transport system.

In cable-operated transport systems, such as cable cars in the form of chairlifts or gondolas, carrying, pulling and / or hoisting ropes of the transport system are guided by pulleys. The pulleys are usually arranged on supports in the field, with multiple pulleys can form a roller assembly together. Pulleys of the transport system serve either as support rollers on which rests the rope, or as hold-down rollers that hold down the rope, that is, the rope is guided under the pulleys. In no case, however, the rope is guided over its entire circumference. This has the consequence that the rope under appropriate conditions, for example, occurring lateral forces due to wind or shaking movements, can jump from the pulleys. The rope is moved in such a case parallel to a rotation axis of the pulley and can escape from a guide groove of the pulley.

At the pulleys supporting columns are usually arranged to secure the transport system so-called Seilfänger that collect the rope after derailing of one or more roles. Operation of the transportation system is conventionally interrupted by the triggering of a breakage bar switch operated by the derailed rope. Thus, in the manner described, the position of the rope can only be detected in two positions. Either the rope is guided in the rope pulley or it is already derailed. A statement as to whether the danger of a rope derailment threatens or not, can not be made in the manner described.

A circuit arrangement for monitoring the error-free and / or for detecting a faulty state, in particular for monitoring the position of the rope, a cable car or chairlift system is in the DE 197 52 362 A1 disclosed. In this publication, it is proposed in particular to monitor the position of the cable with inductive or capacitive proximity switches. However, this has the disadvantage that a high-precision installation of the proximity switch is required in order to be able to make reliable statements about the condition of the system. The use of proximity switches also has the disadvantage that when worn the pulleys positioning the proximity switch must be changed with increasing operating time of the transport system.

It is therefore an object of the present invention to improve a rope layer monitoring device, a cable-operated transport system and a method for rope position monitoring a rope-driven transport system of the type described above so that an imminent rope derailment of the rope from at least one pulley of the transport system can be easily detected.

This object is achieved in a rope layer monitoring device of the type described above according to the invention that a movement amount detecting means for determining a first amount of movement of the at least one first pulley and a second amount of movement of the reference roller is provided and that an evaluation device for comparing the first and second movement amount and for determining a Motion size deviation of the first and second movement amount from each other, which corresponds to an operating safety state of the transport system, is provided.

With such a rope layer monitoring device can be easily and reliably determine whether and how far the rope of the transport system from a rest position relative to the at least one first pulley moves relative to this. Preferably, an inlet or outlet roller of a roller assembly is selected as the first roller, as reference roller a pulley, which is arranged between two adjacent pulleys. In fact, a transverse force acting on the cable in the at least one first roller typically results in a greater deflection of the cable from the rest position than in the reference roller. A deflection of the rope from the rest position has in a conventional Pulley, however, with the result that the rope no longer touches the at least one first roller at the lowest point of the guide groove, but at a raised edge or a flank of the same. However, if the cable is guided at constant speed over both the at least one first roller and the reference roller, then the effective radii of the at least one first roller and the reference roller differ from one another due to the cable deflection. As a result, the at least one first roller, which typically has a larger effective radius, relative to which the cable is more deflected out of rest than the reference roller, has a reduced rotational speed than the reference roller. However, the rotational speed is a first amount of movement of the at least one first pulley and can be compared with a rotational speed of the reference roller defining a second amount of movement. With the evaluation device, it is thus possible in a simple manner to determine a movement variable deviation between the first movement variable determined by the movement-size detection device and the second movement variable. The greater the deviation of the first and second motion quantities from each other, the greater the risk of cable derailment. A value of the movement quantity deviation therefore correlates directly with an operational safety state of the transport system. The greater the movement quantity deviation, the more uncertain the operational safety state of the transport system. With the rope layer monitoring device proposed according to the invention, a rope layer of the transport system can be monitored on one or more rope pulleys in a simple manner, solely by determining the movement variables of two rope pulleys. It can also easily and safely detected changes in the rope layer and thus in particular an imminent threat of rope derailment are reacted before the rope actually derailed. An elaborate adjustment of the movement size detection device, as in the from DE 197 52 362 A1 known circuit arrangement is the case, is in the not required. Namely, it is not the position of the rope directly determined, but a change in the rope layer indirectly on the influence of Seillageänderung on the respective amount of movement of the monitored pulleys. The proposed rope layer monitoring device is also completely independent of the type and shape of the rope. A cable structure, which may have an influence on the measurement result in direct monitoring, for example by means of proximity sensors, is irrelevant to the present invention. The rope layer monitoring device according to the present invention is also suitable for detecting wear on the monitored rollers. With increasing operating time, the pulleys wear off, which leads to a change in the movement speed of the monitored pulleys at a constant drive speed of the rope. Thus, wear conditions can be determined within roller arrangements or between different roller arrangements. This has the advantage that pulleys of the transport system need only be actually serviced or replaced if wear of the monitored pulley exceeds a certain predetermined amount. Furthermore, the device proposed according to the invention has the advantage that discontinuities of the movement of the rope play no role in determining the safety state of the transport system. Depending on load, for example, the sag in the tension field of the rope between two roller assemblies can change. By determining the movement quantity deviation, in particular the speed components caused by load fluctuations and variable cable accelerations are compensated.

It is favorable if an operating safety state determining device is provided for determining the operational safety state of the transport system as a function of at least one specific movement variable deviation. The operating safety condition determining device allows it, depending on a determined or determined movement variable deviation to determine the operational safety state of the transport system. For example, it is thus possible to specify the operating safety state of the transport system as a function of the determined movement variable deviation, for example "ready for operation" or "risk of cable derailment" or "risk of rope derailment on roller arrangement no.

Advantageously, a rope-detecting device is provided for determining a position of the rope in the at least one first pulley. For example, by determining the position of the rope in the at least one first pulley, an operational safety state of the transport system can be determined. Furthermore, it is also conceivable, the position of the rope in the at least one first pulley or a guide groove thereof relative to a rest position in which no lateral forces acting on the rope to specify.

Preferably, the rope-detecting device is designed such that a deflection of the rope in the at least one first pulley from the rest position, in which no transverse forces act on the rope, can be determined from the determined movement variable deviation. This can be directly specify how far the rope is deflected from the rest position, for example, when it is pressed from a lowest point of the guide groove laterally on a roller flank of the guide groove of the axis of rotation of the pulley parallel to this away.

According to a preferred embodiment of the invention, it may be provided that the operating safety state determining device is designed in such a way that the position of the cable determined by the rope-type detection device in the at least one first cable pulley establishes an operational safety state the transport system can be assigned. It is also possible in this way to determine and indicate an operating safety status of the transport system when the position of the cable is determined by the rope-type detection device.

Advantageously, the evaluation device is designed such that a movement variable deviation for at least two first pulleys can be determined by comparing the first amount of movement of the at least two first pulleys and the second amount of movement of the reference role. By determining a movement size deviation for at least two first pulleys, the imminent danger of a cable derailment can be predicted even better and safer. In particular, the two first pulleys may be arranged on the same pulley arrangement, but they may also be first pulleys of different pulley arrangements. The latter variant thus makes it possible to monitor not only one roller assembly at the risk of a possible cable derailment in a transport system comprising a plurality of roller assemblies and not just a roller assembly, but several or even all. Furthermore, a certain redundancy or plausibility check can also be made possible in determining the operational safety state of the transport system. Thus, in particular wear of rolls can be determined more accurately when two or more first pulleys are monitored in the manner described.

It is favorable if a comparison standard for the operating safety state is provided and if an operating safety state signal generating device is provided for generating an operating safety state signal which corresponds to a value of the operational safety state on the comparative scale assigned to the determined movement variable deviation. The comparative scale for the operational safety condition can in particular indicate how the operational safety of the transport system is ordered. It may include an indication from 0% to 100% or, for example, a scale of grades from 1 to 6. However, different levels of operational safety may be explicitly indicated, such as "good", "low risk", "increased risk" or "very high big risk "of a rope derailment. In particular, an operating safety state signal can be generated by the operating safety state signal generating device, which thus indicates which value the current operating safety state of the transport system takes, taking into account the comparative scale, on the basis of the determined motion variable deviation.

It is advantageous if a comparison scale for the operating safety state is provided and if an operating safety state signal generating device for generating an operating safety state signal which corresponds to a value of the operational safety state on the comparative scale associated with a deflection of the cable in the at least one first pulley from the rest position is provided. With such operating safety status signal generating device, an operating safety status signal can be generated, which has a value for the operational safety state according to the comparative scale, so that from the rest position of the cable in the at least one first pulley from the rest position indirectly an operating safety status signal can be determined and specified.

It is advantageous if the operating safety state signal generating device is designed in such a way that specific motion variable deviations of at least two first pulleys can be processed in order to produce the operating safety state signal. Such operational safety condition signal generating means allows two or more first pulleys to monitor and the risk of possible Seilentailisung to work on these pulleys. These may be first pulleys of a single or multiple roller assemblies. In particular, it is also conceivable to monitor all roller arrangements of the transport system, that is to say at least one first pulley per roller arrangement.

It is favorable if the operating safety status signal generating device comprises a maximum value determination unit with which a maximum value of at least two motion variable deviations can be determined.
With the maximum value determination unit, it is possible, in particular, to evaluate which of two or more determined movement variable deviations of two or more first roles is greatest. Preferably, the determined maximum value of the largest movement variable deviation determines the operational safety status of the entire transport system. Furthermore, it can also be determined on which first roller or on which roller arrangement of the transport system currently the greatest risk of rope derailment exists.

So that an operator of the transport system can easily and safely monitor the operational safety state of the transport system, it is advantageous if an optical and / or acoustic display device is provided for displaying the operating safety status signal. The display device may, for example, comprise a color scale for indicating the operational safety state, for example from red to green. It can of course also be provided a screen which displays the operating safety status of the transport system in full text, by symbols or by color representations. An acoustic display device may be provided, for example, in the form of loudspeakers, wherein preferably an acoustic signal is generated when the operational safety state for a the operation of the transport system reaches critical value. The display device may in particular also be part of a mobile signaling device. For example, a mobile telephone which is capable of optically and / or acoustically displaying the operational security status signal is suitable as a mobile signaling device. Preferably, a vibration alarm can also be used to indicate the operating safety status signal of an operator. Optionally, the transmission of the operating safety status signal via an electronic message, such as a so-called SMS or an e-mail, would be possible on a mobile phone.

Advantageously, an alarm device is provided for generating an alarm and / or switch-off signal when a value of the operational safety status signal exceeds a predetermined limit value. By way of example, the alarm device may be comprised by the evaluation device or the operational safety state determination device. The generated alarm and / or shutdown signal can be displayed or automatically used for reducing a drive speed of the transport system or for switching off the same, for example by being passed to a control and / or regulating device of the transport system for further processing.

In order for an operator to be able to recognize an alarm state determined with the alarm device, it is favorable if an optical and / or acoustic alarm signal display device is provided for displaying the alarm and / or switch-off signal. For example, the alarm signal display device, as well as the display device for displaying the operating safety status signal, in a control station of the transport system or at locations where an operator can engage in the control and / or regulation of the transport system, be arranged.

Conveniently, the alarm device is designed and cooperates with a control and / or regulating device of a drive of the transport system that due to the generation of the alarm and / or switch-off signal, a drive speed of the transport system can be reduced and / or the drive of the transport system can be switched off. The thus formed alarm device makes it possible to automatically intervene in the operation of the transport system, that is, it is not necessary that an operator recognizes the detected alarm condition and then has an influence on the operation of the transport system. Rather, a reduction in the drive speed of the transport system or their shutdown can be done automatically if the risk of rope derailment threatens.

It is advantageous if the movement quantity detection device is designed such that the first and second movement quantities can be determined simultaneously. Thus, for example, with the evaluation device, the movement variable deviation can be determined practically simultaneously with the determination of the movement quantities, so that an operational safety state of the transport system and thus also the danger of imminent cable derailment can be specified practically simultaneously and thus in real time.

In order to be able to compensate for possible fluctuations in the detection of the motion quantities, it is advantageous if the motion quantity detection device is designed such that the first and second motion variables can be determined as a function of time and the evaluation device is designed such that a mean deviation of the first motion variable from the second Movement size over a predetermined time interval can be determined. This makes it possible, in particular, to prevent even the slightest fluctuation of the movement quantity deviation, which is a critical operating condition corresponds, the transport system unnecessarily switched off or their speed is unnecessarily reduced. The time interval can in principle be specified as desired. For example, it would be conceivable to specify a time interval in a range from 0.5 s to 5 s, to determine an average movement variable deviation over this time interval and to determine the operational safety state of the transport system on the basis of the determined average movement variable deviation.

In order to minimize wear of the movement quantity detection device, it is favorable if it is designed for contactless determination of the first and / or second movement quantity.

A structure of the motion-quantity detection device is simplified in particular if it is designed in the form of a speed or angular speed detection device. It can be determined in a simple manner, the rotational speed or the angular velocity of the at least one first pulley and the reference roller. With the evaluation device can then easily determine speed differences or angular velocity differences between the at least one first pulley and the reference roller and so specify a motion size deviation, which in turn serves as a basis for indicating the operating safety state of the transport system.

A particularly simple construction of the rotational speed or the angular velocity detection device can be achieved in that it comprises a clock input member which can be connected in a rotationally fixed manner to the pulley whose magnitude of motion is to be determined, and at least one sensor for detecting a rotation of the timing component. In particular, such a rotation of the clock command element can be detected contactlessly with a sensor, which in particular may be formed in the form of an inductive or capacitive proximity switch.

It is advantageous if the clock input member is designed in the form of a timing disk with a plurality of regularly arranged on a circumference of the timing disk clock members. A movement of the clock members relative to the sensor can be determined in a simple manner. For example, the clock members may be in the form of magnets. In addition, in order to obtain a good resolution, it is advantageous if several clock elements are provided per angular unit. Thus, a movement amount of the at least one first pulley or the reference roller can be determined, even if the respective role has not completed a full revolution.

A particularly simple construction of the timing disk results when the timing members are formed in the form of radially outwardly or axially projecting projections which form a regular toothing.

In order to be able to detect movement of the clock command element in a particularly simple manner, in particular with capacitive or inductive proximity switches, it is favorable if the clock command element is at least partially made of a metal. Preferably, the clock members are made of a metal.

Preferably, the Taktvorgabeglied is provided with an anti-icing layer. Thus, it can be prevented that the Taktvorgabeglied iced and damaged by a layer of ice formed at a certain distance from the Taktvorgabeglied sensor can be damaged.

Particularly favorable in the production and also effective in the effect is an anti-icing layer, which is made of a plastic.

Preferably, the sensor is an inductive or capacitive proximity sensor. With such sensors, a movement size of a pulley can be detected simply and safely and also without contact.

According to a preferred embodiment of the invention it can be provided that the movement amount detection device is designed such that a movement amount of an inlet roller and / or an outlet roller of the roller assembly, which form the at least one first pulley, can be determined. A rope derailment threatens at a roller assembly initially at an inlet roller or an outlet roller, as these rollers can be absorbed at the least, the lateral forces acting on the rope. Therefore, an operational safety condition of the transport system can be determined most accurately at inlet rollers or outlet rollers of the roller arrangement by measuring their movement variables in comparison with the movement quantity of a reference roller.

It is advantageous if the motion-quantity detection device is designed in such a way that an amount of movement of an inner pulley arranged between adjacent pulleys and forming the reference roller can be determined. An inner, arranged between adjacent pulleys pulley is ideal as a reference role, as acting on a rope lateral forces on the position of the rope to the reference roller have the least effect. Consequently, a position of the rope relative to such a reference roller changes little if at all, whereas the position of the rope can change markedly at an entry roller or an exit roller due to transverse forces acting on the rope. On the basis of the movement variable deviation to be determined between the first movement quantity of the at least one first pulley and The reference role can then be determined in a simple manner and safely an operational safety state of the transport system.

It is particularly advantageous to use one of the rope layer monitoring devices described above for monitoring the position of a cable in a transport system in the form of a cable car. With such a rope layer monitoring device, the cable car can be taken out of service especially before a rope derailment, and thus in good time before it can lead to an accident, in the worst case with personal injury.

Conveniently, the rope layer monitoring devices described above are used for monitoring the position of a carrying, pulling and / or hoisting rope of a rope-operated transport system. The rope layer monitoring devices are particularly suitable for monitoring the position of each type of rope which is moved to operate a cable-operated transport system.

It is furthermore advantageous if the rope layer monitoring devices described above are used to monitor the position of a rope guided by rope pulleys which have a circumferential cable guide groove.

The task described above is achieved according to the invention in a cable-driven transport system of the type described above, that a movement amount detecting means for determining a first amount of movement of the at least one first pulley and a second amount of movement of the reference roller is provided that an evaluation device for comparing the first and second movement amount and for determining a movement amount deviation of the first and second movement quantities from each other, which is an operational safety condition of the transportation system corresponds, is provided. Such a cable-operated transport system meets the highest safety requirements, because it is possible to operate the cable-operated transport system by providing the Seillage monitoring device, in particular one of the Seillage monitoring devices, as described above, so that the risk of rope derailment is detected and accordingly in the operation of the transport system can be intervened, for example, by reducing a speed of the same or by switching off.

Preferably, the cable-operated transport system comprises one of the above-described rope layer monitoring devices. All the advantages described above are then also realized in the transport system as a whole.

Preferably, the rope is a carrying, pulling and / or hoisting rope. The rope layer monitoring device of the transport system can thus be used to monitor all moving ropes of the system, which are subject to the risk of rope derailment.

It is favorable if a plurality of roller arrangements are provided and if at least two of the roller arrangements are each assigned one or a common rope layer monitoring device. Provide multiple roller assemblies has the advantage that the moving rope of the transport system is performed particularly well and safely. A guide is also improved, the more pulleys are provided per roller assembly. The rope layer monitoring device can be formed individually such that it is intended for a roller arrangement or that a common rope layer monitoring device is provided overall for two or more roller arrangements. The above-described rope layer monitoring devices also have the advantage that with them existing transport facilities readily be retrofitted. For example, it is sufficient to provide two movement detection devices per roller arrangement, which detect the first and second movement quantities of the at least one first cable pulley and the reference roller.

Furthermore, the object stated in a method of the type described above is achieved according to the invention in that a first amount of movement of the at least one first pulley and a second amount of movement of the reference roller is determined that the first amount of movement of the at least one first pulley and the second amount of movement Reference role are compared and a movement amount deviation of the first and the second movement amount of each other is determined, which corresponds to an operational safety state of the transport system. In principle, however, it would also be conceivable to determine the first and second movement quantities on the at least one first pulley and the reference roller, wherein the two pulleys are not arranged on a common roller arrangement, but on different roller arrangements. In principle, any two pulleys of the transport system can be used in the manner described in order to determine a movement quantity deviation and to specify an operational safety state of the transport system on the basis of the size of the movement variable deviation. Typically, the greater the amount of motion deviation of the first and second motion quantities from one another, the more critical the operational safety condition is.

It is advantageous if a position of the rope in the at least one first pulley is determined from the determined movement variable deviation and if the position of the rope in the at least one first pulley is assigned an operational safety state of the transport system. If the position of the cable changes relative to the at least one first cable pulley, its movement variable typically changes. This is because the rope usually is guided in a guide groove of the pulley. If the cable is moved due to acting transverse forces relative to at least one first pulley, it moves from a lowest position in the guide groove on a groove flank laterally outward and away from the axis of rotation of the pulley, so that an effective radius of the first guide groove for the Rope changes. The radius typically becomes larger as a result of a rope layer change. If the rope is moved at a constant speed, this changes a rotational or angular speed of the at least one first pulley. This becomes smaller due to the increased radius. In particular, when the geometry of the guide roller is known, it is thus possible to determine a position of the cable in a simple manner from the movement variable deviation. The position of the rope can also be assigned in a simple way an operating safety state of the transport system.

It is advantageous if a deflection of the rope in the at least one first pulley from a rest position, in which no transverse forces act on the rope, is determined from the determined movement variable deviation. Thus, an absolute deflection of the rope relative to the rest position can be determined.

It is advantageous if the movement variable deviation for at least two first pulleys is determined by comparing the first movement quantity of the at least two first pulleys and the second movement quantity of the reference roller. Determining the movement variable deviation for at least two first pulleys has the particular advantage that measurement errors due to such redundancy can be better excluded.

Preferably, the movement amount deviation is compared with a comparison standard for the operational safety state and an operating safety status signal corresponding to the movement variable deviation is generated, which corresponds to an assigned value of the operational safety state on the comparative scale. The comparative scale may in particular be a comparative scale of one of the types described above. The operating state signal is particularly suitable for automatic further processing, that is, it can be used for further processing with a control and / or regulating device of the transport system.

Advantageously, the deflection of the cable in the at least one first pulley from the rest position is compared with a reference scale for an operating safety state and the movement amount deviation corresponding operating safety state signal generated, which corresponds to an associated value of the operating safety state on the comparative scale. So can be closed in a simple manner from the deflection of the rope on the operating safety state of the transport system and this specified.

It is favorable if certain motion variable deviations of at least two first pulleys are processed during generation of the operational safety status signal. This has the advantage that any measurement errors that may occur in connection with the determination of the movement quantity deviation for a first pulley can be disregarded. Furthermore, the reliability of the transport system as a whole is improved by such an approach, since at two or more points an imminent rope derailment hazard detected and timely operation of the transport system can be adapted to it.

It is advantageous if a value of the operational safety state signal corresponds to the larger of the determined movement variable deviations determined for at least two first pulleys by comparing the first movement quantity of the at least two first pulleys and the second movement variable of the reference roller. Thus, an operating safety state signal can be generated, wherein the operating safety state of the transport system is determined by the size of the determined motion variable deviations. The largest of the detected movement size deviations is usually associated with the operational safety state, in which threatens the greatest risk of rope derailment.

So that an operator can easily and reliably recognize which operating safety state the transport system currently has, it is expedient if the operating safety status signal is displayed optically and / or acoustically.

It is advantageous if an alarm and / or shutdown signal is generated when a value of the operating safety status signal exceeds a predetermined limit value. Due to the automatic generation of the alarm and / or shutdown signal can be intervened in a simple manner in the operation of the transport system, for example automatically by interaction with a control and / or regulating device of the transport system or manually by an operator according to the alarm and / or Shutdown signal engages in the control and / or regulating device of the transport system.

So that an operator can immediately recognize that an operational safety state prevails, to which an alarm and / or switch-off signal is assigned, It is advantageous if the alarm and / or shutdown signal is displayed optically and / or acoustically.

To counteract the risk of imminent rope derailment, it is advantageous if, as a result of the generation of the alarm or shutdown signal, a drive speed of the transport system is reduced or a drive of the transport system or the transport system is switched off.

In order to be able to instantaneously determine a movement quantity deviation, it is favorable if the first and second movement quantities are determined simultaneously. The movement quantity deviation, which is determined from the comparison of the first and the second movement quantity, thus corresponds to a deviation of the movement quantities from one another at the time of their determination.

According to a preferred variant of the method according to the invention, it can be provided that the first and the second movement quantities are determined as a function of time and that an average movement variable deviation of the first movement variables is determined by the second movement parameters over a predetermined time interval. With such an arrangement, possible fluctuations in the rope speed over a certain time interval can be compensated. In addition, it is possible to avoid switching off the transport system for movement size deviations that do not occur permanently without reason.

In order to minimize wear of the transport system and thus to increase its service life, it is expedient for the first and / or second movement quantities to be determined without contact.

Advantageously, a speed of the at least one first pulley and / or the reference roller is determined as a first and / or a second movement variable. A speed of the pulleys can be determined in a simple manner, for example by means of a speed sensor.

Preferably, an angular velocity of the at least one first pulley and / or the reference roll is determined as the first and / or second motion variable. An angular speed of the pulley can be determined easily with corresponding angular velocity sensors.

It is favorable if the first and / or the second movement variable are determined using a rotational speed or angular velocity detection device. With, for example, speed or angular velocity sensors, the first and / or second operating variable can thus be determined in a simple manner.

Advantageously, as at least one first pulley, an inlet roller and / or an outlet roller of the pulleys are selected, which form terminal pulleys of the roller assembly. As already described above, the action of a lateral force on the cable at inlet or outlet rollers of a roller arrangement is to be observed most strongly. Consequently, the risk of rope derailment is greatest at these roles. Usually, the rope on inlet or outlet rollers jump down first of the same. Under a terminal pulley of the roller assembly is the first or last pulley to understand the roller assembly, which limits a span of the rope to a next roller assembly.

It is advantageous if a pulley is selected as a reference role, which forms an inner, arranged between two adjacent pulleys pulley. Preferably, it is arranged on the innermost of a roller assembly pulley. For example, in a pulley arrangement comprising seven rope pulleys, the fourth, that is to say the middle rope pulley, is preferably selected as the reference roller. The farther the reference roller of entry or exit rollers is arranged remotely on the roller arrangement, the lower the influence of a transverse force acting on the cable. In this way, a significant change in an operating safety state can be determined particularly accurately and reliably if an inner pulley is selected as the reference roller.

Preferably, the method is used to monitor the position of a rope in a transport system in the form of a cable car. In particular, imminent accident risks in connection with a possible rope derailment can be reduced.

It is advantageous if the method for monitoring the position of a carrying, pulling and conveying cable of a transport system is used. Since in practice all these types of rope can jump from guide rollers, the method is perfectly suited to monitor a threatening rope derailment for all mentioned types of rope.

Particularly advantageously, the method can be applied to pulleys, which have a circumferential Seilführungsnut. The Seilführungsnut also called guide groove serves for the lateral guidance of the rope. The method can be determined in particular in a simple manner when the rope moves out of the Seilführungsnut by acting transverse forces. When the rope slips on a lateral groove side wall by occurring lateral forces and starts to something out of Seilführungsnut out To move, an effective radius of the pulleys is changed relative to the rope, usually enlarged. This reduces a speed of the rope pulley driven by the rope at a constant rope speed. This change in the amount of movement can be determined and compared with determining the motion magnitude in a reference role and from this an operational safety state of the transport system can be derived.

The method can be applied particularly favorably to a cable pulley whose cable guide groove defines a circular arc section in cross section. Such roles are particularly easy to produce and provide good leadership of the rope even when acting on the rope shear forces.

Figur 1:

eine schematische Darstellung zweier Stützen mit Rollenanordnungen einer Seilbahn mit einer leichten Last;

Figur 2:

eine schematische Darstellung zweier Stützen mit Rollenanordnungen einer Seilbahn mit erhöhter Last;

Figur 3:

eine Draufsicht auf eine Rollenanordnung bei auf das Seil wirkenden Querkräften;

Figur 4:

eine Schnittansicht durch eine Seilrolle mit darin geführtem Seil ohne wirkende Querkräfte;

Figur 5:

eine Schnittansicht analog Figur 4, jedoch mit einer auf das Seil wirkenden Querkraft;

Figur 6:

eine vergrößerte Ausschnittsansicht aus Figur 5;

Figur 7:

eine Schnittansicht einer Taktscheibe;

Figur 8:

eine schematische Darstellung einer Seillageüberwachungsvorrichtung bei einer seilbetriebenen Transportanlage; und

Figur 9:

ein Ablaufdiagramm eines Verfahrens zur Seillageüberwachung einer seilbetriebenen Transportanlage.

The following description of preferred embodiments of the invention is used in conjunction with the drawings for further explanation. Show it:

FIG. 1:

a schematic representation of two columns with roller arrangements of a cable car with a light load;

FIG. 2:

a schematic representation of two columns with roller arrangements of a cable car with increased load;

FIG. 3:

a plan view of a roller assembly with acting on the rope shear forces;

FIG. 4:

a sectional view through a pulley with guided rope without acting shear forces;

FIG. 5:

a sectional view analog FIG. 4 but with a transverse force acting on the rope;

FIG. 6:

an enlarged detail view FIG. 5 ;

FIG. 7:

a sectional view of a timing disk;

FIG. 8:

a schematic representation of a rope layer monitoring device in a cable-operated transport system; and

FIG. 9:

a flow diagram of a method for rope position monitoring a cable-operated transport system.

In the figures, at least schematically, a rope-driven transport system, generally designated by the reference numeral 10, is shown in the form of a cable car. It comprises a rope 12 to which, for example, chairs or gondolas for passenger transport or gondolas 14 for the carriage of loads are arranged and fixedly connected to the rope 12. A drive 16 is designed and arranged such that the cable 12, which is preferably designed to be self-contained, can be moved in order to move the load nacelles 14 circumferentially on the transport system 10.

To guide the rope 12 roller assemblies 18 are provided, which are held on supports 20. The roller assemblies 18, which are also referred to as roller batteries, comprise a plurality of pulleys 22. In the embodiment of a transport system 10 shown in the figures, each roller assembly 18 comprises four pulleys 22. In each case two pulleys 22 are rotatably mounted together on a rocker 24 which are relatively is pivotally mounted to a cross member 26 at a free end of the support 20. ever After how great a load of the rope 20 through the load gondolas 14 in a span 28 between two roller assemblies 18, the rockers 24 tend relative to the cross members 26 more or less strongly. An inclination is the stronger, the greater the load on the rope 12 by the Lastgondeln 14 in the clamping field 28, which is exemplified in the FIGS. 1 and 2 is shown.

The roller assemblies 18 may be in the form of support roller assemblies, that is, the cable 12 abuts these pulley assemblies 18 on the pulleys 22 of the roller assembly 18, as shown in FIGS FIGS. 1 and 2 is shown. Alternatively, the roller assemblies 18 may also be formed as hold-down roller assemblies, that is, the cable 12 is held down by the roller assembly 18 and pushes against the rollers 22 against the direction of gravity. The schematic illustration in FIG FIG. 3 For example, corresponds to a view of a roller assembly 18 in the form of a hold-down roller assembly from below.

The pulleys 22 are provided with a circumferential, radially outwardly open Seilführungsnut 30 in the form of a guide groove which defines a cross section in the form of a circular arc portion. Act on the rope 12 no external lateral forces, then the rope 12 is in the Seilführungsnut 30 symmetrically to a median plane perpendicular to a rotation axis 32 about which the pulley 22 is rotatably mounted. An effective radius of the pulley 22 is then defined by a distance r between the axis of rotation 32 and a tangent 34 parallel to the axis of rotation 32 to the Seilführungsnut 30th

By wind, especially storm, as well as by rocking the Lastgondeln 14 can shear forces F _q , as in FIG. 3 shown, the rope from the described and in FIG. 4 can deflect shown rest position. A deflection of the cable 12 from the rest position manifests itself essentially in that the cable 12 is pushed laterally on an inner surface 36 of the Seilführungsnut 30, so that a distance of the cable 12 from the axis of rotation 32 changes. An effective radius r + Δr of the cable 12 in the deflected state is defined by the distance between a contact point 38 'of the cable 12 on the inner surface 36 of Seilführungsnut 30 of the rotation axis 32. The contact point 38' is defined by a tangent 34 'to the Seilführungsnut 30. The greater the force acting on the rope 12 transverse force F _q is, the further the cable 12 is deflected from the rest position. In the worst case, the rope 12 emerges completely from the Seilführungsnut 30, and jumps from the pulley 22. The risk of such a rope derailment is greater, the greater the forces acting on the rope 12 transverse forces F _q are. The position of the rope 12 in the Seilführungsnut 30 is determined on the one hand by the lateral force F _q and the force applied by the pulley 22 restoring force F _r . It always depends on the acting lateral force F _q an equilibrium and thus an effective radius r + Δr, as exemplified in the FIGS. 3 to 6 shown.

The largest deflection of the cable 12 from the rest position results in inlet rollers 40 and outfeed rollers 42 defining pulleys 22. The inlet roller 40 is formed by the pulley 22 on which the cable 12 enters the direction of movement 44 from the clamping field 28, the outlet roller 42 is defined by the pulley 22, from which the rope 12 enters the clamping field 28 in the direction of movement 44. The inlet roller 40 and the outlet roller 42 of the roller assembly 18 is common that adjacent to them only one further pulley 22 is arranged. The other two pulleys 22 of the roller assembly 18 form so-called inner rollers, which are also referred to below as reference rollers 46. Inner rollers are defined so that they are arranged between two adjacent pulleys 22, in the present embodiment the roller assembly 18 between the inlet roller 40 and a pulley 22 and between a pulley 22 and the outlet roller 42nd

As a result of occurring shear forces F _q is a deflection of the rope 12 in the Seilführungsnut 30 of the inlet roller 40 and the outlet roller 42 largest. The reason for this is that only one further adjacent pulley 22 in addition to the application of a restoring force F _r contributes. A deflection of the rope 12 in the region of the reference rollers 46 is significantly lower compared to the inlet roller 40 and the outlet roller 42, since the respective adjacent pulleys 22 in addition to the reference roller 46 restoring forces F _r apply the shear forces F counteract _q .

In order to determine an operational safety state of the transport system 10, a rope layer monitoring device is provided, which is designated overall by the reference numeral 48. It comprises at least one movement amount detection device 50, which is associated with two pulleys 22. In the present embodiment, two movement amount detecting means 50, each associated with a pulley 22 of the roller assembly 18 are provided. Preferably, a movement amount detection device 50 is associated with one of the two reference rollers 46, a further movement size detection device 50 of the inlet roller 40 and / or the outlet roller 42.

The motion-quantity detection device 50 comprises a timing element 52 in the form of a timing disk connected in a rotationally fixed manner to the respective cable pulley 22 and a sensor 54, for example a capacitive or inductive proximity sensor, with which a rotational movement of the timing input element 52 can be detected. The timing disk is in the form of a flat metallic circular ring 56, which at its outer edge with a toothing 60 comprising a plurality of clock members in the form of teeth 58 forming projections is provided. The example in FIG. 7 schematically illustrated circular ring 56 is provided with a central circular aperture 62, on which a cross-sectionally quadrangular, in the direction of a center of the opening facing receding 64 is provided, in which a not shown, corresponding projection of a bearing shaft of the respective pulley 22 engages, such that the timing member 52 rotates at the same speed as the associated pulley 22.

The ring 56 provided with the toothing 60 is provided with an anti-icing layer 66 in the form of a plastic coating, which prevents possible ice formation on the timing element 52.

The sensors 54 are mounted on the roller assembly 18 so that they can detect movement of the teeth 58. They generate a clock signal which is conducted via signal lines 68 to an evaluation device 70. The evaluation device 70 can be arranged in the region of the roller arrangement 18, for example on the support 20. Optionally, the evaluation device 70, as exemplified in FIG. 8 also be arranged in the area of a control station 72 of the transport system 10. Optionally, a converter unit 74 can be connected between the sensor 54 and the evaluation device 70, which converts the signal generated by the sensor 54 into a speed signal and supplies it to the evaluation device 70.

With the movement amount detection device 50, a movement amount of the respective pulley 22 can be determined, for example, a rotational speed or an angular velocity. The movement amount detection device then forms either a speed detection device or a Angular velocity detection device. The evaluation device 70 is designed such that it can be compared with the determined motion variables and, for example, a difference of the same can be determined. For example, a difference between the sensor signal associated with the sensor 54 associated with the infeed roller 40 and the idle roller 42 may be compared with the sensor signal of the sensor 54 associated with one of the reference rollers 46 and a motion magnitude deviation determined, for example, a speed difference , From the determined speed difference between the two monitored pulleys, a deflection of the cable 12 from the rest position of a pulley 22, for example, the inlet roller 40 or the outlet roller 42 can be determined. This is possible because the cable 12 is moved at a constant speed relative to both pulleys 22, but the effective radii r or r + Δr of the two pulleys 22, if lateral forces act, are different. It follows that a speed of the inlet roller 40 and the outlet roller 42 is smaller than a speed of the reference roller 22. The greater the difference .DELTA.r of the effective radii r and r + .DELTA.r, the greater the deflection of the cable 12 from the rest position of the monitored pulley 22nd Consequently, the risk of cable derailment is greater, the greater a movement variable deviation, that is, for example, a speed difference between the inlet roller 40 or the outlet roller 42 and one of the reference rollers 42.

For example, in the control station 72 an operating safety state determination device 76 is provided, which may optionally also include the evaluation device 70. With the operating safety state determination device 76, an operational safety state of the transport system 10 can be determined as a function of at least one specific movement variable deviation. For this purpose, the operating safety state determining device is preferably in a memory 78 76 a comparative scale 80 deposited. The comparison scale 80 serves to assign a value for the operational safety state to a determined value of a movement variable deviation. For this purpose, an operating safety state signal generating device 82 is used, with which an operating safety state signal is generated, which corresponds to a value of the operational safety state on the comparative scale assigned to the determined movement variable deviations.

A display device 84 serves for optical and / or acoustic display of the operating safety status signal. The display device 84 may be designed, for example, in the form of a monitor and / or a loudspeaker.

The operating safety state determining device 76 further comprises an alarm device 86 for generating an alarm or shutdown signal when a value of the operational safety state signal exceeds a predetermined limit, which may be stored for example in the memory 78. For displaying the alarm signal, an alarm signal indicating device 88 may also be provided. This can in particular also form a unit with the display device 84. The alarm signal indicator 88 serves to visually and / or acoustically indicate the particular alarm and / or shutdown signal.

The alarm and / or switch-off signal can be forwarded by the operational safety state determination device 76 to a control and / or regulating device 90 of the transport system 10, which influences the drive 16 of the transport system 10, for example by, depending on the value of the alarm and / or switch-off signal a speed of Rope 12 is reduced or the drive 16 or the transport system 10 are completely turned off to prevent a rope derailment.

The operating safety state determining device 76 may further comprise a rope-detecting device 92 for determining a position of the cable 12 of the at least one first cable pulley 22. The rope-detecting device 92 may in particular be designed such that a transverse forces acting on the basis of the determined movement variable deviation F _q forced deflection of the rope 12 in the at least one first pulley 22 from the rest position, in which no lateral forces F _{q act} on the rope 12, can be determined. Furthermore, the operating safety state determining device 76 is preferably designed such that the position of the cable 12 determined by the rope-detecting device 92 in the at least one first cable pulley 22 can be assigned an operational safety state of the transport system 10.

The movement amount detection devices 50 are further designed such that they can be detected at the same time with them, the movement quantities of the pulleys 22, to which they are associated. Optionally, the operating safety state signal generating device 82 may be designed such that the first and second motion variables are time-dependent determinable with the motion-quantity detection devices 50 and that the evaluation device 70 is designed such that a mean deviation of the first motion variable from the second motion variable over a predetermined time interval can be determined. This time interval can be chosen freely by the operator of the transport system 10 in principle. For example, the time interval can be selected in a range of 0.5 seconds to 5 seconds. By determining an average operating quantity deviation over a certain time interval, their effect on a possible Rope derailment negligible fluctuations are averaged out, so that an unnecessary reduction in speed or a shutdown of the transport system 10 can be avoided.

The operating safety state device 76 can in particular also comprise a data processing system, for example in the form of a computer, which comprises the functions of the evaluation device 70, the operating safety state signal generating device 82, the alarm signal generating device 88 and the rope-detecting device 92. For inputting data, a corresponding input device, for example a keyboard, may be provided. The data processing system can also be designed such that it is suitable for running a computer program for executing one of the above-described methods for monitoring the position of a cable 12 guided in rollers 22 of a roller assembly 18 or a method as described in the corresponding method claims is claimed. In particular, the computer program may be stored on a computer-readable medium and comprise program code means adapted to execute one of the methods described above or one of the claimed methods when the computer program on the data processing system of the rope layer monitoring device 48 expires. The computer-readable medium can be designed, for example, in the form of a data carrier, for example in the form of a CD-ROM, a floppy disk or a memory card.

An example of a possible method sequence for determining the operational safety state is shown schematically in FIG FIG. 9 shown.

After the transport system 10 is put into operation, with the movement amount detection means 50 at least a first amount of movement determines, for example, the rotational speed of the inlet roller 40 or the outlet roller 42. Further, a second amount of movement is determined with a further movement amount detecting means 50, for example, the speed of a reference roller 46. Preferably, the first and second movement amount are measured simultaneously. The evaluation device 70 determines the movement variable deviation between the first and second movement quantities.

In a next step, an operational safety status signal is generated as a function of the determined motion variable deviation. Optionally, the operating safety status signal can be visually and / or acoustically displayed with the display device 84. This can be done, for example, such that a text is displayed on a monitor, indicating the operating safety state, for example, "no fault" or "high risk of rope derailment". Of course, the display device can also display the operating safety status signal in the form of a bar display, which can also be colored. For example, for an operating safety state in which there is no malfunction, a green display, a yellow display with a minimum risk of cable derailment and a red indicator in the event of a major risk of cable derailment. The operational safety status signal is generated with the aid of the comparative scale on the basis of the measured movement variable deviation by appropriate assignment.

In order to influence the operation of the transport system 10, the operating safety status signal is compared with a predefinable limit value. If the operating safety status signal is smaller than the limit value, the operation of the system is continued unchanged, that is, first and second movement quantities are measured further as described above.

If, however, the comparison of the operating safety status signal with the limit value that the limit value has been exceeded, an alarm signal is preferably generated with the alarm device and optically and / or acoustically displayed, for example, with the alarm signal display device 88. In particular, the display may include a full text display with indications such as "decrease speed" or "switch off drive" or "switch off plant". Depending on how far the limit was exceeded, either the speed of the system can be reduced until the safety signal drops below the limit again and the system can continue to operate at the originally desired speed, or the system can be switched off immediately to automatically switch off to prevent a rope derailment on the monitored pulley 22.

The first amount of movement and the second amount of movement need not necessarily be determined on the same roller assembly 18. It is also possible to provide for the entire transport system 10, a single reference roller 46 and, moreover, to monitor the other pulleys 22 and to determine a movement amount of these other first pulleys with a movement amount detection device 50. However, since the rope 12 is not pulled continuously over a roller assembly 18, but depending on the load a slack in the span 28 may change, this often leads to a discontinuity of the rope speed on different roller assemblies 18. Will the monitored pulley 22, a reference roller 46 on the same roller assembly 18th If, selected due to load fluctuations or variable cable accelerations caused speed components in the determination of the movement size deviation are compensated.

Alternatively, encapsulated incremental or absolute displacement measuring systems can be used as movement quantity detection devices 50.

If the individual measured movement quantities are routed to the evaluation device 70 of the control station 72, transmission and measurement errors can be detected via a correlation of the individual measured values on each roller arrangement 18 or on different roller arrangements 18. If unacceptable differences occur, this may be, for example, a failure of the entire or a failure of parts of the rope layer monitoring device 48 or a rope derailment. In any case, safe operation of the transport system 10 can be ensured on the basis of these redundantly determined measured values.

Preferably, motion detection means 50 of different design and transmission type are used so as not to generate systematic errors in the operation of the rope layer monitoring device 48.

The described rope layer monitoring device 48 has the great advantage that it is completely independent of the rope structure. A so-called rope sling or the design of the rope, for example a rolled or a non-rolled rope, have no influence on the determination of the operational safety state.

Furthermore, the rope layer monitoring device 48 can also be used to automatically determine wear states of rope pulleys 22 via corresponding movement variable comparisons per measured travel distance of the rope 12. Within a roller assembly 18, a wear can be determined in a short-term comparison, a wear of pulleys 22 different role orders 18 is possible over a long-term comparison. With the evaluation device 70, it is also possible, in particular, to compare movement quantities of any pulleys 22 that are monitored with one another, and on This way, for example, by averaging over a certain time interval, a different wear of the pulleys 22 to detect.

Claims (58)

A rope layer monitoring device (48) for monitoring the position of a rope (12) guided in rollers (22) of a roller arrangement (12) in at least one first cable pulley (40, 42) to be monitored, which has at least one first and at least one second, one reference roller (46 ) defining a pulley (22) comprising a roller arrangement (18) of a cable-driven transport system (10), characterized in that a movement amount detecting means (50) for determining a first amount of movement of the at least one first pulley (40, 42) and a second amount of movement of the reference roller (46 ) is provided and that an evaluation device (70) for comparing the first and second movement amount and for determining a movement amount deviation of the first and second movement amount from each other, which corresponds to an operational safety state of the transport system (10) is provided. A rope layer monitoring device according to claim 1, characterized in that an operating safety state determining device (76) is provided for determining the operational safety state of the transport system (10) as a function of at least one specific movement variable deviation. A rope layer monitoring device according to claim 1 or 2, characterized in that a rope-detecting device (92) is provided for determining a position of the rope (12) in the at least one first pulley (40, 42). Seillage monitoring device according to claim 3, characterized in that the rope-detecting device (92) is designed such that from the determined movement variable deviation, a deflection of the rope (12) in the at least one first pulley (40, 42) from the rest position, in which no transverse forces ( F _q ) act on the rope (12), can be determined. A rope layer monitoring device according to claim 3 or 4, characterized in that the operational safety state determining device (76) is designed such that the position of the cable (12) determined by the rope position detection device (92) in the at least one first pulley (40, 42) constitutes an operational safety state of the transport system (10) is assignable. Seillage monitoring device according to one of the preceding claims, characterized in that the evaluation device (70) is designed such that a movement variable deviation for at least two first pulleys (40, 42) can be determined by comparing the first movement quantity of the at least two first pulleys (40, 42). and the second amount of movement of the reference roller (46). A rope layer monitoring device according to any one of the preceding claims, characterized in that an operational safety state comparison scale (80) is provided and operating safety signal generating means (82) for generating an operational safety state signal corresponding to a value of the operational safety state associated with the determined movement amount deviation on the comparative scale (80), is provided. A rope layer monitoring device according to any one of claims 1 to 6, characterized in that an operational safety state comparison scale (80) is provided and an operational safety signal generating means (82) for generating an operational safety signal indicative of a deflection of the cable (12) in the at least one first pulley (40, 42) from the rest position associated value of the operational safety state on the comparison scale (80) corresponds, is provided. Seillage monitoring device according to claim 7 or 8, characterized in that the operating safety state signal generating device (82) is designed such that for generating the operating safety state signal certain movement size deviations of at least two first pulleys (40, 42) are processable. A rope layer monitoring device according to one of claims 7 to 9, characterized in that the operating safety state signal generating device (82) comprises a maximum value determination unit with which a maximum value of at least two motion variable deviations can be determined. Seillage monitoring device according to one of claims 7 to 10, characterized in that an optical and / or acoustic display device (84) is provided for displaying the operating safety status signal. A rope layer monitoring device according to any one of claims 7 to 11, characterized in that an alarm device (86) is provided for generating an alarm and / or switch-off signal when a value of the Operational safety state signal exceeds a predetermined limit. A rope layer monitoring device according to claim 12, characterized in that an optical and / or acoustic alarm signal display device (88) is provided for displaying the alarm and / or switch-off signal. Seillage monitoring device according to claim 12 or 13, characterized in that the alarm device (86) is designed in such a way and interacts with a control and / or regulating device (90) of a drive (16) of the transport system (10), that due to the generation of the alarm and / or switch-off signal, a drive speed of the transport system (10) can be reduced and / or the drive (16) of the transport system (10) can be switched off. Seillage monitoring device according to one of the preceding claims, characterized in that the movement amount detecting means (50) is designed such that the first and second movement quantities can be determined simultaneously. Seillage monitoring device according to one of the preceding claims, characterized in that the movement amount detecting means (50) is formed such that the first and second movement amount can be determined time-dependent and that the evaluation device (70) is designed such that an average deviation of the first movement amount of the second Movement size over a predetermined time interval can be determined. Seillage monitoring device according to one of the preceding claims, characterized in that the movement quantity detection device (50) is designed for the contactless determination of the first and / or second movement quantity. Seillage monitoring device according to one of the preceding claims, characterized in that the movement quantity detecting means (50) in the form of a speed or angular velocity detection means (50) is formed. A rope layer monitoring device according to claim 18, characterized in that the speed or the angular velocity detecting means (50) rotatably connected to the pulley (22) whose movement amount is to be determined connectable Taktvorgabeglied (52) and at least one sensor (54) for detecting a rotation of Timing element (52). A rope layer monitoring device according to claim 19, characterized in that the timing member (52) is formed in the form of a timing disc (56) having a plurality of timing members (58) arranged regularly over a circumference of the timing disc (56). A rope layer monitoring device according to claim 20, characterized in that the clock members (58) are in the form of radially outwardly or axially projecting projections (58) forming a regular toothing (60). A rope layer monitoring device according to any one of claims 19 to 21, characterized in that the timing member (52) is made at least partially of a metal. A rope layer monitoring device according to any one of claims 19 to 22, characterized in that the timing member (52) is provided with an anti-icing layer (66). A rope layer monitoring device according to claim 23, characterized in that the anti-icing layer (66) is made of a plastic. A rope layer monitoring device according to any one of claims 19 to 24, characterized in that the sensor (54) is an inductive or capacitive proximity sensor (54). Seillage monitoring device according to one of the preceding claims, characterized in that the movement amount detecting means (50) is designed such that a movement size of an inlet roller (40) and / or an outlet roller (42) of the roller assembly (18), which at least one first pulley (40 , 42) is determinable. Seillage monitoring device according to one of the preceding claims, characterized in that the movement amount detecting means (50) is formed such that a movement amount of an inner, between adjacent pulleys (22) arranged pulley (22) which forms the reference roller (46) can be determined. Use of a rope layer monitoring device (48) according to any one of the preceding claims for monitoring the position of a rope (12) in a transport system (10) in the form of a cable car (10). Use of a rope layer monitoring device (48) according to one of claims 1 to 27 for monitoring the position of a carrying, pulling and / or conveying cable (12) of a cable-operated transport system. Use of a rope layer monitoring device (48) according to one of claims 1 to 27 for monitoring the position of a rope (12) guided by rope pulleys (22) which have a peripheral cable guide groove (30). Cable-operated transport system (10) with a cable (12), a drive (16) for moving the cable (12) and at least one roller arrangement (18) for guiding the cable (12), wherein the at least one roller arrangement (18) at least one first Pulley (40, 42) and at least a second, a reference roller (46) defining pulley (22), further comprising a rope layer monitoring device (48) for monitoring at least the position of the at least one first pulley (40, 42) guided rope ( 12) is provided, characterized in that a movement amount detecting means (50) for determining a first amount of movement of the at least one first pulley (40, 42) and a second amount of movement of the reference roller (46) is provided that an evaluation device (70) for comparing the first and second amount of movement and for determining a movement amount deviation of the first and second movement amount from each other, which is a Betriebssiche state of health of the transport system (10) corresponds, is provided. Cable-operated transport system according to claim 31, characterized in that the rope layer monitoring device (48) is a rope layer monitoring device (48) according to one of claims 2 to 27. Cable-operated transport system according to claim 31 or 32, characterized in that the cable (12) is a carrying, pulling and / or conveying cable (12). Cable-operated transport system according to one of claims 31 to 33, characterized in that a plurality of roller assemblies (18) are provided and that at least two of the roller assemblies (18) is associated with one or a common rope layer monitoring device (48). Method for monitoring the position of a guided in roles of a roller assembly rope in at least one first to be monitored pulley comprising the at least one first and at least a second, a reference role defining pulley roller assembly of a cable-driven transport system, characterized in that a first amount of movement of the at least one first Pulley and a second amount of movement of the reference roller is determined that the first amount of movement of the at least one first pulley and the second amount of movement of the reference roller are compared and a movement amount deviation of the first and the second amount of movement is determined from each other, which corresponds to a safe operating condition of the transport system. A method according to claim 35, characterized in that from the determined movement variable deviation a position of the rope in the at least one first pulley is determined and that the position of the rope in the at least one first pulley is assigned an operational safety state of the transport system. A method according to claim 35 or 36, characterized in that from the determined movement variable deviation, a deflection of the rope in the at least one first pulley from a rest position in which no transverse forces act on the rope is determined. Method according to one of claims 35 to 37, characterized in that the movement amount deviation for at least two first pulleys by comparing the first amount of movement of the at least two first pulleys and the second amount of movement of the reference roller is determined. A method according to claim 38, characterized in that the movement quantity deviation is compared with a comparison scale for the operational safety state and an operating safety state signal corresponding to the movement variable deviation is generated, which corresponds to an assigned value of the operational safety on the comparative scale. A method according to claim 38, characterized in that the deflection of the rope in the at least one first pulley from the rest position compared with a reference scale for the operational safety state and the movement amount deviation corresponding operating safety state signal is generated, which is an associated Value of the operational safety condition on the comparative scale corresponds. A method according to claim 39 or 40, characterized in that in the generation of the operating safety state signal certain movement variable deviations of at least two first pulleys are processed. A method according to claim 41, characterized in that a value of the operational safety condition signal corresponds to the larger of the determined movement variable deviations, which is determined for at least two first pulleys by comparing the first amount of movement of the at least two first pulleys and the second amount of movement of the reference roller. Method according to one of claims 39 to 42, characterized in that the operating safety status signal is displayed optically and / or acoustically. Method according to one of claims 39 to 43, characterized in that an alarm and / or shutdown signal is generated when a value of the operating safety state signal exceeds a predetermined limit. A method according to claim 44, characterized in that the alarm and / or shutdown signal is displayed optically and / or acoustically. A method according to claim 44 or 45, characterized in that as a result of the generation of the alarm or shutdown signal, a drive speed the transport system is reduced or a drive of the transport system or the transport system is switched off. Method according to one of claims 35 to 46, characterized in that the first and the second amount of movement are determined simultaneously. Method according to one of claims 35 to 47, characterized in that the first and the second motion variable are determined time-dependent and that an average motion variable deviation of the first motion variable is determined by the second motion variable over a predetermined time interval. Method according to one of claims 35 to 48, characterized in that the first and / or the second movement quantity are determined without contact. Method according to one of claims 35 to 49, characterized in that a speed of the at least one first pulley and / or the reference roller is determined as a first and / or second movement amount. Method according to one of claims 35 to 49, characterized in that an angular velocity of the at least one first pulley and / or the reference roller is determined as the first and / or second movement amount. Method according to one of claims 35 to 51, characterized in that the first and / or second movement amount using a Speed or angular velocity detection device can be determined. Method according to one of claims 35 to 52, characterized in that at least one first pulley an inlet roller and / or an outlet roller of the roller assembly are selected, which form terminal pulleys of the roller assembly. Method according to one of claims 35 to 53, characterized in that as a reference role, a pulley is selected, which forms an inner, between two adjacent pulleys arranged pulley. Method according to one of claims 35 to 54, characterized in that the method for monitoring the position of a rope in a transport system in the form of a cable car is applied. Method according to one of claims 35 to 55, characterized in that the method for monitoring the position of a support, traction and / or hoisting rope of a transport system is applied. Method according to one of claims 35 to 56, characterized in that the method is applied to pulleys, which have a circumferential Seilführungsnut. A method according to claim 57, characterized in that the method is applied to a pulley whose Seilführungsnut defined in cross section a circular arc section.

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