EP3562726B2 - Maintenance cage and a method for the maintenance of a cable car - Google Patents

Description

Technical area

The invention relates to a maintenance basket for cable cars, a cable car and a method for maintaining a cable car.

State of the art

Cable cars transport cabins, chairs or other transport containers hanging on a rope between two locations. The rope is preferably all-round. To support and/or guide the rope, the rope, in particular the conveyor rope, is carried on batteries of rollers carried by support structures.

Fig. 1 and 2 show an example of a section of such a cable car with a rope 3, a support structure 1 and a battery of rollers 2.

The support structure 1 is designed here as a support pillar with a support shaft 11 and with a cross strut 12, also known as a yoke. However, the support shaft 11 and/or the cross brace 12 can also be replaced by other support structures, such as a building or a rock. The cross strut 12 preferably protrudes on two sides, so that a battery of rollers 2 can be stored on each extremity of the cross strut 12, on which the rope 3 is moved in different directions. However, it is also possible for the support structure 1 to only carry one roller battery 2. Support structures 1 often also have a lifting yoke 13 to which certain parts of the cable car, for example the cable 3, can be attached.

The roller battery 2 is an assembly that has a plurality of rollers 21 arranged one behind the other for guiding and securing the rope 3. Roller batteries 2 carry the weight of a rope 3 and its hanger (up holder), press a rope 3 down (hold down holder) or combine these functions (change holder). Fig. 1 and 2 show an example of a high holder, which can only be seen in detail in Fig. 1 shown while Fig. 2 the roller batteries 2 are only shown schematically as a square. The roller battery 2 usually has a battery structure and rope pulleys or rollers 21, the rollers 21 being rotatably mounted in the battery structure, so that the rope 3 is guided on the rollers 21 of the roller battery 2. The battery structure is usually mounted at one or at both ends of the cross strut 12 by means of a main axis 4, rotatable about a horizontal axis which runs at right angles to the cable direction. However, storage on other parts of a support structure is also possible. The battery structure itself preferably has a main rocker 24 and a plurality of rockers 25, which are rotatably mounted on rocker axes 23 (preferably with the same axial direction as the main axis 4) in the main rocker 24. The rockers 25 support the individual rollers 21 (or additional lower rockers) on corresponding roller axes 22. The lowest rocker level preferably has two rollers 21. The battery of rollers preferably has at least four rollers 21.

The roller battery 2 usually weighs more than 500 kg, often more than 1 or 2 tons, making it impossible for the roller battery to be moved and maintained by one person on site. The maintenance of such a roller battery 2 includes the removal of all rotary axes, their cleaning and testing and the reinstallation of the rotary axes. To do this, the roller battery 2 must be removed from the support pillar 1 using a crane or helicopter to carry out this maintenance and then reinstalled on it. This also requires that the roller battery 2 is accessible from above, for which the rope 3 usually has to be removed from the rollers 21 of the roller battery 2 and moved inwards. This requires several hours of preparation for each pier, in addition to the high effort of transporting the roller battery. The current state of the art solution for maintaining the roller batteries is therefore complex and unsatisfactory. Due to the high weight of the roller batteries and the high load placed on them, there is no solution in the prior art as to how the axles of the roller batteries can be maintained without removing the roller batteries.

EP2301819A2 , WO2015/003196 , EP2502799 , show various maintenance baskets for the maintenance of a cable car, in particular EP2301819A2 and WO2015/003196 disclose a method for maintaining a reel battery. EP0683079A1 and JPH02104374 show cable car vehicles for rescuing people.

Presentation of the invention

It is an aim of the invention to improve the maintenance of cable cars, in particular of roller batteries.

According to the invention, this goal is achieved with a method for maintenance and a maintenance basket according to the independent claims.

By using a maintenance basket, a maintenance technician can move directly to the cable car maintenance point and carry out the necessary maintenance work on site. This eliminates the need for time-consuming disassembly and removal of maintenance parts such as the roller batteries.

By securing the load of the roller battery to a support structure of the cable car, the load of the roller battery, which is caused, for example, by its weight or by the cable of the cable car, can be removed from the axle so that it can be moved, cleaned and/or checked without having to transport the roller battery away. This allows the load of the roller battery to be removed from the axle so that it can be cleaned and/or checked while the roller battery 2 or the main rocker 24 remains in the secured position. Preferably the load is secured to a support yoke of the support structure.

Thanks to the two lifting mechanisms on the two hanging devices, the difference in height of the rope at the two attachment points can be compensated for with the two lifting mechanisms. This allows the maintenance technician located on the work platform to further adjust the height of the work platform to maintain the cable car so that he can reach the appropriate maintenance point.

Further advantageous embodiments are specified in the dependent claims.

In one embodiment, the load is secured to a support yoke of the support structure.

In one embodiment, a lifting mechanism is used to secure the load.

In one embodiment, the lifting mechanism is configured to raise the position of the work platform relative to the maintenance basket structure.

In an unclaimed embodiment, the maintenance basket structure is connected between the first lifting mechanism and the second lifting mechanism only via the height-adjustable work platform.

In one embodiment, the first lifting mechanism includes a rope-like structure connecting the work platform to the first hanger and a mechanism for adjusting the length of the rope-like structure to adjust the distance between the first hanger and the work platform, the second lifting mechanism a a rope-like structure connecting the work platform to the second hanger, and a mechanism for adjusting the length of the rope-like structure to adjust the distance between the first hanger and the work platform.

In an unclaimed exemplary embodiment, the rope-like structure of the first and second lifting mechanisms each has two rope-like sub-structures.

In an unclaimed exemplary embodiment, the four are rope-like

Substructure the work platform at the four corners.

In an unclaimed embodiment, the work platform is mounted on a lifting carriage of each lifting mechanism so that the work platform can rotate about a horizontal axis which is arranged perpendicular to the connecting line between the first attachment point and the second attachment point.

In one embodiment, the first hanger and/or the second hanger allow the work platform to rotate about a vertical axis.

In an unclaimed exemplary embodiment, the maintenance basket is designed to move the work platform horizontally and perpendicular to the rope direction.

In an unclaimed exemplary embodiment, the floor of the work platform is designed as a grating.

In an unclaimed exemplary embodiment, the maintenance basket has a crane.

In an unclaimed embodiment, the crane has a first support device, a second support device, a cross beam between the first and second support devices and a lifting mechanism attached to the cross beam, the crane being designed to be supported on the maintenance basket with the first support device and to be supported with the second support device on a support structure of the cable car.

In an unclaimed embodiment, the first support device is attached to a structure of the maintenance basket, which allows displacement of the mounted first support device in the cable direction.

In an unclaimed embodiment, the maintenance basket has a

Testing device for magnetic inductive material testing.

In an unclaimed exemplary embodiment, the maintenance basket has a small parts cleaner with a grease-dissolving cleaning liquid.

In an unclaimed embodiment, the maintenance work includes the following steps: rotating a main rocker of the pulley battery about an axis that supports the main rocker so that the rope is lifted from pulleys stored in a first side of the main rocker; Cleaning and/or checking and/or replacing the axles, plain bearings, rockers and/or rollers mounted in the first side of the main rocker; rotating the main rocker of the pulley battery about an axis that supports the main rocker so that the rope is lifted off pulleys mounted in a second side of the main rocker opposite the first side; and cleaning and/or checking and/or replacing the axles, plain bearings, rockers and/or rollers mounted in the second side of the main rocker.

In an unclaimed exemplary embodiment, cleaning and/or checking and/or replacing the axles, plain bearings, rockers and/or rollers mounted on one side of the main rocker involves securing the rocker mounted on this side with a crane supported on the work platform.

Further embodiments become clear from the description of an exemplary embodiment.

Short description of the characters

Fig. 1

eine erste Ansicht eines Seilbahnstützpfeilers aus dem Stand der Technik mit einer Rollenbatterie.

Fig. 2

eine zweite Ansicht des Seilbahnstützpfeilers aus Fig. 1.

Fig. 3

eine schematische Darstellung eines Ausführungsbeispiels eines erfindungsgemässen Wartungskorbs.

Fig. 4

ein Schnitt durch die Linie IV-IV aus Fig. 3.

Fig. 5

ein Schnitt durch die Linie V-V aus Fig. 5.

Fig. 6

eine schematische Darstellung des Wartungskorbs aus Fig. 3 mit einer Seilsteigung.

Fig. 7A bis 7E

Darstellung der Schritte eines Ausführungsbeispiels eines Verfahrens zur Wartung einer Seilbahn.

Fig. 8

ein weiteres Ausführungsbeispiel eines Wartungskorbs.

Fig. 9

eine Draufsicht eines Hubmechanismus eines Wartungskorbs.

Fig. 10

eine Seitenansicht des Hubmechanismus aus Fig. 9.

Fig. 11

eine Draufsicht eines Hubmechanismus eines Wartungskorbs.

Fig. 12

eine Seitenansicht des Hubmechanismus aus Fig. 11.

Fig. 13A

ein schematischer Schnitt der Lagerung der Rollenbatterie in der Stützstruktur mit einer Hauptachse.

Fig. 13B

ein erster Schritt zum teilweisen Ausbau der Hauptachse.

Fig. 13C

ein zweiter Schritt zum teilweisen Ausbau der Hauptachse.

Fig. 13D

ein dritter Schritt zum teilweisen Ausbau der Hauptachse.

The invention is explained in more detail with reference to the accompanying figures, which show

Fig. 1

a first view of a cable car support pillar from the prior art with a roller battery.

Fig. 2

a second view of the cable car support pillar Fig. 1 .

Fig. 3

a schematic representation of an exemplary embodiment of a maintenance basket according to the invention.

Fig. 4

a cut through line IV-IV Fig. 3 .

Fig. 5

a cut through the line VV Fig. 5 .

Fig. 6

a schematic representation of the maintenance basket Fig. 3 with a rope incline.

7A to 7E

Representation of the steps of an exemplary embodiment of a method for maintaining a cable car.

Fig. 8

another embodiment of a maintenance basket.

Fig. 9

a top view of a lifting mechanism of a maintenance basket.

Fig. 10

a side view of the lifting mechanism Fig. 9 .

Fig. 11

a top view of a lifting mechanism of a maintenance basket.

Fig. 12

a side view of the lifting mechanism Fig. 11 .

Fig. 13A

a schematic section of the storage of the roller battery in the support structure with a main axis.

Fig. 13B

a first step towards partially expanding the main axis.

Fig. 13C

a second step to partially expand the main axis.

Fig. 13D

a third step to partially expand the main axis.

Ways of carrying out the invention

The elements of a cable car have already been developed as part of the state of the art Fig. 1 and 2 described and will not be described again here.

For the maintenance of the cable car, a maintenance basket is now proposed, which can transport a maintenance technician to a maintenance point on the cable car. Fig. 3, 4 , 5 and 6 show an exemplary embodiment of such a maintenance basket 5. The maintenance basket 5 has a maintenance basket structure, a hanging device 6 and a work platform 8.

The hanging device 6 is designed for hanging the maintenance basket structure on the rope 3 of the cable car. The hanging device 6 preferably has a fastening mechanism 62 with which the maintenance basket 5 can be attached to a hanging rod 61 for vehicles (cabins, chairlifts, etc.) of the cable car, the hanging rod 61 being fastened to the rope 3. This allows the maintenance basket 5 to be attached to different hanging rods 61 of different cable cars. This attachment mechanism 62 may be, for example, a flange or an opening into which the hanging rod can be inserted and secured, or any other attachment mechanism. Alternatively, the fastening mechanism 62 could also consist directly of a hanging rod 61, which can be fastened to the rope 3, for example with a clamp, coupling or dome clamp. The hanging device 6 preferably has at least one joint 63, 64, which rotatably supports the maintenance basket structure with one, two or more degrees of freedom. Preferably, the at least one joint 63, 64 allows the maintenance basket structure or the maintenance basket 5 to be rotatably mounted about a horizontal axis 63', which is oriented at right angles to the rope direction. Preferably, the at least one joint 63, 64 allows the maintenance basket 5 or the maintenance basket structure to be rotatably mounted about a vertical axis 64'. This is particularly advantageous in the exemplary embodiment described below with two hanging devices 6. In the exemplary embodiment, the two joints 63 and 64 are provided for the two rotations. However, it is also possible to only provide one joint for both rotations. It is also possible not to provide any rotatable storage in the hanging device 6. The hanging device 6 preferably has two of the previously described hanging devices 6, so that the maintenance basket 5 can be stored at two attachment points along the rope 3. Both hanging devices 6 are preferably attached to the same rope 3. However, it is also possible to attach or guide the two hanging devices 6 on different ropes, for example a pull rope and a support rope. The two attachment points of the maintenance basket 5 along the rope 3 are preferably located on the two extremities of the maintenance basket 5. Attachment of the maintenance basket 5 to two attachment points allows a stable (non-swaying) work platform 8, which is a great help for maintenance work. Through the joint 64 with the vertical axis of rotation 64 ', such a maintenance basket 5 or the maintenance basket structure can be better guided around the circulation points at the ends of the cable car or around other curves. However, it is also possible to attach the maintenance basket 5 or the maintenance basket structure to just one hanging device 6.

The maintenance basket structure is attached to the hanging device 6. If the hanging device 6 is only attached to one attachment point on the rope 3, the maintenance basket structure is preferably attached to the hanging device 6 centered above the center of gravity of the maintenance basket 5. If the hanging device 6 is attached to the rope 3 with two hanging devices 6 at two attachment points, the maintenance basket structure is attached to the two hanging devices 6 (preferably at its extremities).

The work platform 8 is now attached to the maintenance basket structure, so that maintenance work at the maintenance point can be carried out by the person on the work platform 8 maintenance technicians can be carried out. The working platform 8 is preferably longer than 2 meters (m), preferably longer than 3 m, preferably longer than 4 m. The length basically extends in the direction of the rope 3. The working platform 8 is preferably wider than 50 centimeters (cm) , preferably wider than 80 cm, preferably wider than 1 m/100 cm. The width basically extends at right angles to the rope 3. The working platform 8 is preferably at right angles. The bottom of the work platform 8 preferably has a grating. The grating is preferably arranged in all areas of the floor on which the maintenance technician can move. The grating has proven to be particularly advantageous as it still allows the maintenance technician to stand securely even in snow and when contaminated with slippery materials such as oil and grease. The work platform 8 preferably has a railing so that a maintenance technician located on the work platform 8 can hold on and/or is protected against falling. The railing preferably runs around the sides of the work platform 8 that are accessible to the maintenance technician.

The work platform 8 preferably has a work table, preferably a workbench. The work table is preferably arranged movably on the work platform 8, for example on rollers and/or rails. The work platform 8 preferably has a ladder. This ladder is preferably integrated into the railing.

Preferably, the working platform 8 has a test bench for magneto-inductive material testing of parts of the cable car, in particular the roller battery, in particular of axes, in particular the main axis 4, the rocker axes 23 and/or the roller axes 22. This test bench for magnetic inductive material testing is also referred to as an MT test bench. Magneto-inductive material testing is preferably magnetic particle testing. The test bench is mobile and attached to the work platform 8, so that the test bench can be moved to the recess 4 'in the support structure 1 for material testing of the main axis 4 of the roller battery. For the material testing of the remaining parts, the test bench is preferably attached to the work platform 8, preferably to the work table. The material testing is preferably a non-destructive materials testing (NDT). This is used, for example, to detect cracks in the part.

The work platform 8, preferably the work table, preferably has a small parts cleaner for cleaning the parts of the cable car that require maintenance. The small parts cleaner is preferably designed to clean said parts using a cleaning fluid. The cleaning fluid is, for example, compressed air or a cleaning liquid. A grease-dissolving liquid is preferably used as the cleaning fluid to remove contaminated oil or grease from the parts. The small parts cleaner preferably has a cleaning tool that is in fluid communication with a source or reservoir for the cleaning fluid, so that the parts in question can be cleaned with the cleaning tool and the cleaning fluid emerging from the cleaning tool. The small parts cleaner preferably also has a collecting device to collect drain liquid. The small parts cleaner and/or the cleaning tool is so mobile that it can be guided to the recess 4' of the main axis 4 in order to clean the main axis 4 on site.

The working platform 8 preferably has a plurality of transport boxes. The transport boxes can preferably be attached to different positions on the work platform 8. The transport boxes are preferably attached to the railing 82 of the work platform 8. Preferably, the transport boxes are attached to the outside of the work platform 8 on the railing 82 of the work platform 8, so that the transport boxes do not restrict the working space of the work platform 8 within the railing 82. The transport boxes are preferably closed all around (with the possible exception of a small opening at the bottom for condensation), so that the goods being transported are protected against wind and weather. The transport boxes are preferably attached to the railing 82 on the side of the work platform 8 that faces away from the supports 1 (normally to the right in the forward direction).

Spare parts such as replacement rollers 21, replacement rockers 24, 25 and replacement axles 4, 22 and 23 are also transported in the maintenance basket 5 to replace these parts if the inspection reveals damage to these inspected parts. The work platform 8 has holders for the spare parts on the side of the work platform 8 facing the supports 1, preferably on the railing there. These holders are preferably designed so that the spare parts are held securely even when the work platform 8 moves. These brackets are preferably arranged on the inside of the railing 82 so that the weight of the spare parts serves as a balancing weight for the maintenance basket 5.

The work platform 8 preferably also has maintenance tools, in particular testing and/or inspection tools and/or consumables such as lubricants, plain bearings, screws, nuts, etc. These can, for example, be transported in the transport boxes and/or on the work table.

The working platform 8 also has at least one safety device 9 such as cable pulls, load slings and/or hydraulic cylinders. These securing device(s) allow the work platform 8, the maintenance basket 5, the rope 3, the roller battery 2 and/or the rocker(s) 24, 25 to be secured to the support 1, in particular to the lifting yoke 13. A hydraulic cylinder is particularly advantageously used as the safety device 9. A hydraulic power pack is used for confirming the hydraulic cylinder. Advantageously A hydraulic unit is used to operate several hydraulic cylinders. The hydraulic unit is preferably driven mechanically, ie by a maintenance technician. However, an electric drive is also possible.

The work platform 8 preferably has a hydraulic pump that pumps hydraulic fluid from a hydraulic accumulator into a hydraulic system. The hydraulic pump can be driven manually or by an electric motor. The hydraulic system has a distributor block that connects the hydraulic pump to several hydraulic consumers. The connection to the consumers can be fixed or, as is preferred, removable via connections. A consumer could, for example, be a hydraulic motor to operate the lifting mechanism 7 or the further lifting mechanism. Other consumers could be hydraulic cylinders, which can be used as safety devices 9 as described above.

The work platform 8 preferably has a power generator which generates the power required for the tools and/or the test bench. The power generator could possibly also drive the hydraulic pump directly.

The work platform 8, preferably the work table, preferably has a further lifting mechanism. This additional lifting mechanism is, for example, a scissor lift. The lifting mechanism is arranged on the work platform 8 or the work table so that it is below the rope 3. The lifting mechanism can also be a crane. The crane preferably has a first support device, a second support device and a crane cross member. The first support device is attached or attachable to the work platform 8. The second support device can be attached or placed on the support structure 1, preferably on a flat platform (pedestal) of the support structure 1. The crane cross beam is arranged between the two support devices. The height of the first and/or the second support device is adjustable so that the crane cross member can be aligned horizontally. The first support device can be firmly mounted on the work platform 8 or on a structure of the work platform 8 that is movable in the cable direction, so that the first support device only needs to be adjusted in its height and position in the cable direction and does not have to be installed during every maintenance. Preferably, the first support device or its movable structure is mounted on the outside of the railing 82 of the work platform 8 or on the railing 82. As a result, the space on the work platform 5 is not restricted by the crane. The first support device thus remains mounted while the maintenance basket 5 is traveling. However, the first support device could also simply be supported within the railing 82 and/or on the floor of the work platform 8. The second support device is preferably supported on the support structure 1. The first and/or second support device has two support legs, so that this support device is more stable. The cross member and/or the second support device of the crane can be retracted or folded or dismantled while the maintenance basket 5 is traveling. For example, the cross member can be moved to the side of the maintenance basket 5 facing away from the supports 1, so that the cross member, possibly with the second support device, does not interfere with the journey. A cable pull is preferably arranged on the cross member and can be used to lift parts. The position of the cable on the cross member between the first and second support devices can preferably be moved (even under load) and fixed. This is preferably achieved by a carriage or trolley that can be moved on the crane cross member and to which the cable pull is attached. The crane is preferably made of metal, preferably aluminum. With the additional lifting mechanism, the roller battery 2 or parts of the roller battery can be relieved in order to dismantle the roller battery 2 for testing and/or maintenance. In particular, the further lifting mechanism can be used to support the rockers 25 and/or rollers 21 in order to remove the rocker and/or roller axes 22 and/or 23 for testing and/or maintenance.

In one embodiment, the work platform 8 is movable relative to the maintenance basket structure. This allows the work platform 8 to be better positioned relative to the maintenance point (than the position of the work platform 8 predetermined by the maintenance basket structure). In a simple case, the work platform 8 can be attached to the support structure 1 during maintenance work. This can be achieved, for example, with load slings, cable pulls and/or hydraulic cylinders that can be moved along their length. In a preferred embodiment, the maintenance basket structure has a lifting mechanism 7, which can raise the work platform 8 relative to the maintenance basket structure. The work platform 8 can thus be brought closer to the maintenance point. A hydraulic mechanism is preferably used as the lifting mechanism 7. However, mechanical lifting mechanisms are also possible. Preferably, the lifting mechanism 7 is operated by the power of the maintenance technician. However, motor operation is also possible. Preferably, the lifting mechanism has two lifting mechanisms, so that the ends of the work platform 8 can be raised differently in the cable direction compared to the maintenance basket structure (and preferably independently of one another). This allows a rope gradient to be compensated if the maintenance basket structure is suspended at two attachment points along the rope 3. This is in Fig. 6 shown as an example.

According to the invention, with two hanging devices 6 and two lifting mechanisms 7, the maintenance basket structure is made up of two separate maintenance basket structures formed, each of which is attached to one of the two hanging devices 6. Each maintenance basket structure has one of the lifting mechanisms 7. The two lifting mechanisms 7 each have a lifting carriage 71, which is connected to a corresponding attachment point of the work platform 8 (preferably at its extremities in the direction of the cable). Between one or both lifting mechanisms 7, preferably between the lifting carriage or carriages 71, and the work platform 8, a joint 81 is preferably arranged, which allows the work platform 8 to rotate relative to the lifting carriage 71 about a horizontal axis 81 '. Preferably, each of the two maintenance basket structures forms a guide for the lifting carriage 71. Preferably, the two maintenance basket structures are connected only via the work platform 8. This saves a lot of weight. However, it is also possible to provide a common/connected maintenance basket structure between both hanging devices 6, on which the work platform 8 is then stored (movable or not).

Fig. 8 shows another embodiment of a maintenance basket.

The work platform 8 has a frame. The frame forms a railing 82 and a floor frame. The frame frame and/or the base frame is formed from (welded) metal rods. The floor frame supports a floor surface on which the maintenance technician or technicians can stand and move, and/or the work table. The floor frame preferably forms a frame linkage surrounding/encircling the work platform 8. Preferably, the floor frame also has a further reinforcing or stiffening rod between the frame rods.

The maintenance basket 5 in Fig. 8 Like the last exemplary embodiment, has two hanging devices 6, preferably on the two extremities (in the rope direction) of the maintenance basket 5. These are described in more detail here. The hanging device 6 has a hanging rod 61 which can be attached to the rope 3 using a rope fastening mechanism such as a clamp, coupling or dome clamp. The hanging rod 61 has a roughly U-shaped shape, so that the hanging rod 61 is first guided away from the rope 3 roughly horizontally (perpendicular to the rope direction), then is guided roughly vertically downwards and then again roughly horizontally (perpendicular to the rope direction). ) is guided again under the rope 3 or under the rope fastening mechanism. The hanging device 6 preferably also has a cross member 65. The crossbar 65 is attached under the hanging rod 61. The cross member 65 is preferably designed to carry the work platform 8, preferably the lifting mechanism 7, which the work platform 8 supports in a height-adjustable manner. The cross member 65 is preferably slidably attached to the hanging rod 61. The displacement direction is preferably horizontal and/or perpendicular to the rope direction. This allows the working platform 8 to be optimally positioned in the direction of displacement relative to the support structure 1, in particular to the roller battery 2. The rope direction of the maintenance basket is defined even without attachment to a rope 3 of a cable car by the rope fastening mechanism, by the direction defined by the two hanging devices 6 or by the fastening mechanism 62. However, the displacement device for displacing the work platform horizontally and/or perpendicular to the rope direction could also be implemented differently. The hanging device 6 described could also be used as a single hanging device 6 for a maintenance basket. The hanging device 6 described can also be used in the exemplary embodiment of the maintenance basket 5 described above Fig. 3 to 6 be used. The rope fastening mechanism preferably has a clamping coupling with which the hanging device 6 can be attached to the rope 3. For the circulation of the maintenance basket 5 from the first direction of travel to the opposite second direction of travel, for example at the mountain station, the hanging device 6 can be uncoupled from the rope 3. Preferably, the cable fastening mechanism further has rolling means in order to guide the hanging device 6 in a circulation guide provided for this purpose, while the clamping clutch is disengaged during the revolution. The rolling means preferably have two rollers arranged one behind the other in the rope direction.

The exemplary embodiment in Fig. 8 shows a further alternative for a lifting mechanism 7. The lifting mechanism 7 described below is preferably arranged on both extremities in the rope direction of the work platform 8, so that the distance of the work platform 8 from the rope 3 or from the hanging device 6 can be adjusted at both ends of the work platform 8 can. The lifting mechanism 7 described below can also be used in the exemplary embodiment of the maintenance basket 5 described above Fig. 3 to 6 be used.

The lifting mechanism 7 has a rope-like structure 75 which connects the work platform 8 to the maintenance basket structure or to the hanging device 6. The rope-like structure 75 is preferably a chain, but can also be designed as a rope, wire rope or other flexible, elongated structure that supports the longitudinal direction. The chain is preferably a one-dimensionally movable chain, preferably a roller chain. One-dimensionally movable chains have the advantage that the movement of the working platform 8 is not possible or is only possible in a damped manner except in the plane of the chain movement. This prevents the working platform 8 from swaying too much under the rope 3. The direction of movement of the one-dimensional chain is preferably arranged parallel to the direction of the rope. However, it is also possible to use a two-dimensionally movable chain, such as a link chain, or other one-dimensionally movable chain types. Chains have a high load capacity and are very stable against external influences such as fire and weather. The rope-like one Structure 75 preferably has two rope-like substructures 75, which connect the work platform 8 to the hanging device 6 (in particular to the cross member 65) on two sides of the rope 3 or the rope fastening mechanism. Preferably, two corners of the work platform 8 are connected to two lateral extremities of the hanging device 6 or the cross member 61. In the case of two lifting devices 7, the four corners of the working platform 8 are connected to the two hanging devices 6 with four rope-like substructures 75. In the in Fig. 8 In the exemplary embodiment shown, the two rope-like sub-structures 75 are formed from a common rope-like structure 75. The common rope-like structure 75 extends from (a first end) of the cross strut 65 to (a corner) of the work platform 8. There the rope-like structure 75 is deflected and guided back to the (center of the) cross strut 65. There the rope-like structure 75 is deflected again and guided back to (another corner) of the work platform 8. There the rope-like structure 75 is deflected again and guided back to (the second end) of the cross strut 65.

The lifting mechanism 7 also has a mechanism that can change the length of the rope-like structure 75 between the hanging device 6 and the work platform 8. The mechanism is preferably designed to engage in the rope-like structure and to displace the rope-like structure relative to the mechanism. This mechanism can be arranged either in the hanging device 6 or on the work platform 8. In the exemplary embodiment in Fig. 8 This mechanism is arranged in the hanging device 6, here the crossbar 65, which shortens or lengthens the end or ends of the rope-like structure 75. The mechanism can be designed, for example, as a cable or chain hoist.

A disadvantage of the mechanism described is that the adjustability of the height is limited by the maximum length of the loop formed by the rope-like structure 75. Due to the zigzag guidance of the rope-like structure 75, a very long chain must be used in order to achieve great adjustability. This leads to a lot of weight.

Fig. 9 to 12 show two alternative embodiments for the lifting mechanism 7. The two rope-like substructures 75 connect the hanging device 6 and the work platform 8 as described above. A first end of the rope-like substructure 75 is (firmly) connected to one of the work platform 8 or the hanging device 6. The second end of the rope-like substructure 75, which is opposite the first end, is connected to the mechanism on the other of the work platform 8 or the hanging device 6. The mechanism can freely adjust the stopping point along the rope-like structure 75 and / or changes the distance between the hanging device 6 or the work platform 8. This allows the distance between the hanging device 6 and the work platform 8 to be adjusted up to the length of the rope-like substructure 75. As a result, the working platform 8 can be pulled up to the hanging devices 6 attached to the rope 3, for example without a crane or other lifting device, on a rope 3 of almost any height. Only the hanging devices 6 need to be attached to the rope 3. The mechanism is preferably arranged on the work platform 8. This allows the rest of the rope-like substructure 75 to hang down or be stored below the mechanism or the work platform. The second end of the rope-like substructure 75 can, for example, be transported into a box below the mechanism and/or below the work platform. Due to the open second end of the rope-like substructure 75, the two hanging devices 6 can also be attached to the rope 3 without the working platform 8 and the working platform 8 can subsequently be connected to the two mechanisms of the lifting mechanism 7 at the second ends of the four rope-like substructures 75.

In the exemplary embodiment in 9 and 10 the mechanism has two holding wheels 77 for each rope-like substructure 75. Each holding wheel 77 engages in the rope-like substructure 75 and holds the rope-like substructure 75 firmly. The rope-like substructure 75 runs between the two holding wheels 77, so that the rope-like substructure 75 cannot slip out of the two holding wheels 77. By rotating one or both of the two holding wheels 77, the position of the rope-like structure 75 can be moved relative to the mechanism or to the working platform 8. The holding wheels 77 are preferably arranged so that the space between the two holding wheels 77, through which the rope-like substructure 75 runs, is arranged (in the vertical direction) under the attachment of the first end of the rope-like substructure 75 to the hanging device 65. As a result, the rope-like structure 75 runs from the first end to the mechanism or the space between the two holding wheels 77 and also in a straight line after the mechanism in the vertical direction. The clamping means 78 or the bearing means 78 secure the axes of rotation of the two axes of rotation 76 on which the holding wheels 77 rotate in order to prevent the rope-like structure 75 from jumping out of the holding wheels 77. The axes of rotation 76 are arranged parallel to one another. The axes of rotation 76 are arranged parallel to the narrow side of the work platform 8 and/or at right angles to the long side of the work platform 8 or to the rope direction. The axes of rotation 76 are rotatably mounted on the work platform 8. The holding wheels 77 are preferably chain wheels, for example a gear for a roller chain or a pocket wheel for a link chain. For other rope-like structures 75, for example, clamping or friction wheels can be used as holding wheels 77. Preferably, the four holding wheels 77 for the two rope-like substructures 75 run on the same two axes 76, so that the two holding wheels 77 are rotated on both sides at the same time and the distance between the hanging device 6 and the working platform 8 is the same for both rope-like substructures 75. The mechanism further comprises a rotation means 79 which causes rotation of the axis 76 or the axes 76. The rotating means 79 may have a gear ratio that reduces the effort required to rotate the axis 76. The rotating means 76 is preferably hydraulic.

In the exemplary embodiment described, the two axes 76 of the holding wheels 77 are arranged at the same height. Alternatively, it is also possible to arrange the axes of rotation 76 of the two holding wheels 77 vertically (and horizontally) offset from one another, so that the axes of rotation 76 are arranged at different heights. This is for example in the embodiment in the Fig. 11 and 12 shown. This allows the rope-like substructure 75 to be guided from the first end of the rope-like substructure 75 to the lower holding wheel 77, around this lower holding wheel 77, back to the upper holding wheel 77, around the upper holding wheel 77 back down. The deflection around each holding wheel 77 is preferably 180°. A safety device 90 on the side of the upper retaining wheel 77 facing the second end of the rope-like substructure 75 can be used to prevent the rope-like substructure 75 from jumping out of the upper retaining wheel 77. A similar safety device 90 could be used on the other side of the upper retaining wheel 77 and/or on one or both sides of the lower retaining wheel 77.

In an exemplary embodiment not shown, it would also be possible to arrange the two axes of rotation 76 vertically one above the other, so that the rope-like substructure 75 is once on a first horizontal side around the upper holding wheel 77 and once on a horizontal side opposite the first horizontal side around the lower holding wheel 77 is running. The rope-like substructure 75 is thus guided in an S-shape between the two holding wheels 77. The weight of the working platform 8 causes the rope-like substructure 75 to be pressed against the holding wheels 77.

In an exemplary embodiment not shown, it would also be possible to arrange the mechanism for adjusting the distance between the hanging device 6 and the work platform 8 on the hanging device 6. The first end of the rope-like substructure 75 is then arranged on the work platform 8. The mechanism could consist of (only) two (instead of four) holding wheels, with a rope-like substructure 75 being deflected by 180° around each holding wheel. The second end of the rope-like substructure 75 can hang freely around the corresponding holding wheel after being deflected. The rope-like substructure 75 is guided from the working platform 8 to the corresponding holding wheel of the hanging device 6, where it is deflected by 180° and then guided downwards again (freely hanging). The two holding wheels for the two rope-like substructures 75 can be mounted on a common axle 76. The common axis 76 can be mounted in the cross member 65 or at least parallel to it.

The hanging devices 6 preferably have a joint, not shown, which allows rotation about a vertical axis. The joint could, for example, be arranged between the hanging linkage 61 and the cross member 65 or in the hanging linkage 61.

According to the invention, the maintenance work on cable cars can be significantly shortened and simplified if the maintenance technician is transported to the maintenance point with a maintenance basket hanging on the cable 3 of the cable car and carries out the necessary maintenance work on site.

In 7A to 7E The steps of a method for maintaining a cable car are described using the example of maintenance of a roller battery 2, as described for example in the introduction.

In a first step, a maintenance basket, for example the maintenance basket 5, is attached to the rope 3 of the cable car. Then the maintenance technician is transported with the maintenance basket 5 to the maintenance point, for example the location of the roller battery 2 to be serviced (see Fig. 7A ). If the maintenance basket 5 has a movable work platform 8, the work platform 8 can still be positioned so that the maintenance work on the roller battery 2 can be carried out well (see Fig. 6 ). This is preferably achieved by actuating the lifting mechanism 7 or the lifting mechanisms 7. The maintenance basket 5 or the work platform 5 is preferably stabilized on the support structure 1. This is achieved, for example, using support rods.

In a second step, the maintenance work is carried out. In the case of the roller battery 2, the first problem is that the main axle 4, on which the entire weight of the roller battery 2 and the load of the rope 3 rests, has to be removed. For this purpose, in a preferred exemplary embodiment, the roller battery 2 is secured at the maintenance point on the support structure 1, preferably on the lifting yoke 13. This results in the load on the main axis 4 being reduced to such an extent that the main axis 4 can be removed at the maintenance point. A safety device 9 is used for this purpose. The securing of the roller battery 2 is preferably based on hanging the load of the roller battery 2 on the support structure 1 or the lifting yoke 13 (see Fig. 7B ). This can be done, for example, with one or more lifting mechanisms 9, for example a cable pull. Cable pull also includes rope-like structures, such as bands, chains, etc. The cable pull preferably has a rope-like structure 91 and a hydraulic cylinder 92. Preferably, the hydraulic cylinder 92 is a double-acting dual hydraulic cylinder. However, in some cases the securing can also be based on the support on the support structure 1 or the lifting yoke 13, for example if the rope 3 acts on the roller battery 2 upwards and the roller battery 2 has to be supported by the lifting yoke 13 in such a way that that the main axis 4 can be removed from the roller battery 2 from the roller battery 2. After securing the roller battery 2, the main axle 4 is now removed from the main axle opening 4 'in the roller battery 2 and the support structure 1, while the roller battery 2 or at least the main rocker 24 is held in place by the securing device 9 (see Fig. 7C ). Now the main axis 4 can be cleaned and/or checked. Preferably, additional (eg rocker and roller) axes 22 and 23 are removed from the roller battery 2, cleaned and/or checked. As previously described, the additional lifting mechanism of the work platform 8 can be used to support the rocker 25 or the roller 21 for the removal of its axis 23 or 22. All removed axes 4, 22 and/or 23 are reinstalled in the roller battery 2 (see Fig. 7D ). Since the roller battery 2 is load-free or at least load-reduced by the safety device 9, the maintenance technician can position the roller battery 2 relative to the support structure 1 in such a way that the main axis 4 can be reinserted into the main axis opening 4 'of the roller battery 2 and the support structure 1. The roller battery 2 is then unlocked so that the load is stored again on the main axis 4 (see Fig. 7E ).

In a third step, the maintenance technician can be transported with the maintenance basket 5 to a next maintenance point, for example the next roller battery 2.

In an alternative second step, one or two of the following two maintenance steps are carried out: a cleaning and/or revision/testing of the main axis 4 and a cleaning and/or revision/testing of the remaining roller battery 2. If both maintenance steps are carried out, their order is important not matter.

Before carrying out one or both of the maintenance steps, the rope 3 is preferably secured with a securing device, preferably a hydraulic cylinder, on the support structure 1, preferably on the lifting yoke. Securing the rope 3 preferably involves lifting the rope 3 from the rollers of the roller battery 2. However, this step is optional and the maintenance steps could also be carried out with the rope 3 stored on the rollers 21 of the roller battery 2. Preferably, the rope is secured to the support structure 1 with a safety device above the main axis 4 and/or in the middle of the main rocker 24. Preferably, the rope 3 is only raised to such an extent that the rope 3 remains guided on the first and second sides of at least one of the rollers 21 mounted in the main rocker 24. This provides additional security for the guidance of the rope 3 and prevents the rope 3 from being laboriously threaded into the rollers 21 after the maintenance work has been carried out.

The cleaning and/or testing of the main axis 4 is described below. As described above, in a preferred exemplary embodiment, the roller battery 2 is secured at the maintenance point on the support structure 1, preferably on the lifting yoke 13. This results in the load on the main axis 4 being reduced to such an extent that the main axis 4 can be moved or removed at the maintenance point. A safety device is used for this purpose. The securing of the roller battery 2 is preferably based on hanging the load of the roller battery 2 on the support structure 1 or the lifting yoke 13. Preferably, the safety device has two sub-safety devices, preferably two hydraulic cylinders, which secure the two extremities in the cable direction of the main rocker 24 on the support structure 1 or the lifting yoke 13 or hang it up. However, the roller battery 2 or the main rocker 24 could also be secured to the support structure 1 using the securing device 9 described above. Preferably, the main axis 4 is not completely removed from the recess 4' for testing or cleaning. The main axis 4 is mounted on a first side (for example pointing away from the support structure 1) and a second side (for example pointing towards the support structure 1) of the main rocker 24 in the recess 4 'of the support structure 1 (see Fig. 13A ). The main axis 4 is now pushed out of the first side of the recess 4' in a first direction (perpendicular to the rope direction and/or away from the support structure 1). The main axis 4 is (only) pushed out so far that the main axis 4 is still in the recess 4 'of the support structure 1 and the main rocker 24 on the first side. At the same time, from the second side, an auxiliary axis 96 with the same diameter or a (slightly) larger diameter as the main axis 4 is pushed into the recess 4 'of the support structure 1 and the main rocker 24 (see Fig. 13D ). The auxiliary axle is pushed in so far that the auxiliary axle is located on the second side in the recess 4 'of both the support structure 1 and the main rocker 24. Thus, the main axis 4 secures the main rocker 24 on the first side and the auxiliary axis secures the main rocker 24 on the second side. This also avoids a complex alignment of the recess 4' of the main rocker 24 with the recess 4' of the support structure 1 in order to reintroduce the main axis 4 later. 13B to 13D show a preferred method for partially pushing the main axis 4 out of the recess 4 'as described. For this purpose, the auxiliary axis 96 is arranged on the second side of the auxiliary axis 96 on the main axis 4, so that its ends lie on one another and the circumferences are arranged flush. With a hydraulic cylinder 94, the auxiliary axis 96 is pressed against the main axis 4, so that the main axis 5 is pushed out on the first side and at the same time the auxiliary axis on the second side is pushed into the recess 4 'of the support structure 1. As described, the auxiliary axle 96 is pushed into the recess 4' until the auxiliary axle 4' is located both in the recess 4' of the support structure 1 and the recess 4' of the main rocker 24 and the main rocker 24 carries on the second side (see Fig. 13C ). The auxiliary axis preferably has a recess that extends along the axial direction. Preferably, this recess is arranged rotationally symmetrically, so that the auxiliary axis 96 is hollow cylindrical. The hydraulic cylinder 94 has a stamp 93, which can be moved by the hydraulics of the hydraulic cylinder 94 and can push the auxiliary axle 96 into the recess 4 '. Either the stamp 93 has an attachment 95 which widens the stamp 93 to such an extent that the stamp 93 cannot be inserted into the recess of the auxiliary axis 96. Alternatively, the stamp 93 can be moved so that it presses against the auxiliary axis 96. Alternatively, the stamp 93 can also be made so wide that it does not fit into the recess 4 '. In the latter case, for the next step, the stamp 93 must have an attachment that fits into the recess 4 '. The stamp 93 is now pushed through the continuous recess of the auxiliary axis 96 and now presses the main axis 4 further out of the first side of the recess 4 '(see Fig. 13D ). The main axis 4 is only pushed out to such an extent that the main axis 4 is still mounted in the recess 4 'of the main rocker and in the recess 4' of the first side of the support structure 1. Thus, for most of the time, the main rocker 24 remains secured on both sides by the auxiliary axle 96 and the partially pushed out main axle 4. This method has the advantage that the auxiliary axle 96 can be designed to be relatively short and therefore weight-saving. In addition, the auxiliary axle 96 can be easily inserted on both sides, even if there is little space there. Alternatively, the auxiliary axis 96 could also be made longer, so that the stamp 93 does not have to be guided through the auxiliary axis 96. Alternatively, the skin axis 4 could also be pushed out directly with the hydraulic cylinder. The part of the main axis 4 protruding from the first side can now be subjected to cleaning and/or testing. For cleaning, the small parts cleaner and/or its cleaning tool is guided to the main axis 4 protruding from the recess 4' of the support structure 1. For the test, the test bench is guided to the main axis 4 protruding from the recess 4 'of the support structure 1 and the crack test is carried out there. On the second side, the plain bearing in the support structure 1 and/or in the main rocker 24 can now be removed. If the roller battery is secured on the second side with the auxiliary axle 96, the auxiliary axle 96 must be removed. Since the roller battery is further secured by the at least one securing device on the support device 1, in particular the lifting yoke 13, and/or by the main axis 4 on the first side on the support device 1, this is possible. Since the auxiliary axle 96 has a continuous recess, you can reach behind the auxiliary axle 96 through the continuous recess and pull it out. Depending on the strength required, this can be done by hand/fingers or with a tool. Preferably, the hydraulic cylinder used above for pushing in can be operated in two directions and can therefore also be used to pull out the auxiliary axle 96. The plain bearing is usually replaced (or cleaned and/or checked) and reinserted into the recess 4′ of the support structure 1 and/or the roller battery 2. The main axis 4 is then pushed back completely into the recess 4 'of the main rocker 24 and the support structure 1. This can be carried out with the help of the hydraulic cylinder 94, which is now arranged on the first side. If the roller battery is not perfectly centered, inserting the main axis 4 will be difficult and can lead to damage to the plain bearing. Therefore, the auxiliary axle 96 on the second side is preferably pushed back into the recess 4 'of the support structure 1 and the roller battery 2/the main rocker 24. As a result, the recess 4 'is centered on the recess 4' of the roller battery 2 and the main axis 4 can now easily be pushed into the recess 4' of the roller battery 2 and the second side of the support structure 1. At the same time, the auxiliary axle is pushed out of the recess 4' on the second side. The diameter of the auxiliary axis 96 is preferably slightly larger than the diameter of the main axis 4, so that the auxiliary axis 96 effects optimal centering. The auxiliary axis 96 can thus be used both for additional securing of the roller battery 2 and for better centering of the recesses 4 'of the roller battery 2 and the support structure 1. The process of centering the recesses 4' and introducing the main axis 4 often took more than an hour in the prior art. This process can be significantly shortened using the method described. However, it is also possible to carry out the process without the auxiliary axis 96. The same procedure is now repeated in the second direction. The main axis 4 is now pushed out of the second side of the recess 4' in a second direction (perpendicular to the cable direction and/or to the support structure 1). The main axis 4 is (only) pushed out so far that the main axis 4 is still in the recess 4 'of the support structure 1 and the main rocker 24 on the second side. At the same time, the auxiliary axle is pushed from the first side into the recess 4 'of the support structure 1 and the main rocker 24. The auxiliary axle is pushed in so far that the auxiliary axle is located on the second side in the recess 4 'of both the support structure 1 and the main rocker 24. The part of the main axis 4 protruding from the second side can now be subjected to cleaning and/or testing. The main axis 4 is then pushed back completely into the recess 4' of the main rocker 24 and the support structure 1 (in the first direction). At the same time, the auxiliary axle is pushed out of the recess 4' on the first side. This means the entire Main axis 4 can be checked and / or cleaned without having to completely remove it from the recess 4 'if the test of the main axis 4 shows that it is ok. Otherwise, it will be pushed out completely and replaced with a replacement main axle 4.

Cleaning and/or checking the remaining roller battery 2 is described below. For this purpose, the main rocker 24 is preferably moved on a first side/extremity in the cable direction (for example the mountain side) of the main rocker 24 with the safety device to the support structure 1, preferably the lifting yoke 13, in such a way that at least one of the rollers on the first side is in the cable direction of the main rocker 24 is pressed against the rope 3. As a result, the roller battery 2 or the main rocker 24 rotates about the main axis 4 and the rope 3 releases the rollers 21 on the opposite second side (e.g. the valley side). This has the advantage that the rope always remains guided in at least one of the rollers 21 of the roller battery 2 during cleaning or inspection. The at least one rocker 25, axle 22, 23, plain bearing and/or roller 21, which are/is mounted on the second side of the main rocker 24 (relative to the main axis 4), can now be used for cleaning and/or testing /or subject to replacement. For this purpose, the at least one rocker 25 on the second side of the main rocker 24 is secured with the further lifting mechanism, preferably the crane, so that the at least one axle 23 is free of load. The at least one axle 23, which supports the at least one rocker 25, can now be removed. As a result, the rocker 25 mounted on the removed axle 23 can be lowered onto the work platform 8, taken apart, its individual parts cleaned, checked and possibly replaced, reassembled and again with the axle 23, which has also been cleaned and checked, back in the main rocker 24 can be attached. If the second side in the cable direction of the main rocker 24 has more than one rocker 25, this is done for each of the rockers 25. The safety device on the first side of the main rocker 24 is moved back again, so that the rope 3 gets back into at least one of the rollers 21 on the second side of the main rocker 24. The same thing is now done on the other side. For this purpose, the main rocker 24 on the second side of the main rocker 24 is preferably moved with the safety device to the support structure 1, preferably the lifting yoke 13, in such a way that at least one of the rollers 21 on the second side is pressed against the rope 3 in the rope direction of the main rocker 24. As a result, the roller battery 2 or the main rocker 24 rotates about the main axis 4 and the rope 3 releases the rollers 21 on the opposite first side in the rope direction. The at least one rocker 25, which is mounted on the second side in the cable direction of the main rocker 24, can now be subjected to cleaning and testing. For this purpose, the at least one rocker 25 on the first side of the main rocker 24 is secured with the further lifting mechanism, preferably the crane, so that the at least one axle 23 is free of load. The same maintenance steps as on the second page are now carried out on the first page in the direction of the rope. The safety device on the second side of the main rocker 24 is moved back again, so that the rope 3 gets back into at least one of the rollers 21 on the first side of the main rocker 24.

Claims (20)

1. Maintenance cage for the maintenance of a cable car, having:

   a maintenance cage structure;

   a suspension device (6) for fastening the maintenance cage structure so as to be suspended from a cable (3) of the cable car, wherein the suspension device (6) has a first suspension device and a second suspension device, wherein the first suspension device is configured for fastening the maintenance cage structure so as to be suspended from a first fastening point on the cable (3) of the cable car, and the second suspension device is configured for fastening the maintenance cage structure so as to be suspended from a second fastening point on the cable (3) of the cable car; and

   a working platform (8) configured for transporting a maintenance technician to a maintenance location of the cable car and for carrying out the maintenance work at the maintenance location by the maintenance technician,

   wherein the maintenance cage structure has a lifting mechanism having a first lifting mechanism and a second lifting mechanism, wherein the working platform (8) is mounted between the first and the second lifting mechanism,

   wherein the first lifting mechanism is disposed in the maintenance cage structure at the side of the first suspension device, and the second lifting mechanism is disposed in the maintenance cage structure at the side of the second suspension device, such that the spacing of the working platform (8) from the cable (3) at the first fastening point can be adjusted by the first lifting mechanism and the spacing of the working platform (8) from the cable (3) at the second fastening point can be adjusted by the second lifting mechanism in a mutually different manner,

   wherein the first lifting mechanism has a cable-type structure (75) which connects the working platform (8) to the first suspension device (6), and a mechanism for adjusting the length of the cable-type structure (75) so as to adjust the spacing between the first suspension device (6) and the working platform (8); wherein the second lifting mechanism (7) has a cable-type structure (75) which connects the working platform (8) to the second suspension device (6), and a mechanism for adjusting the length of the cable-type structure (75) so as to adjust the spacing between the second suspension device (6) and the working platform (8)

   characterized in that

   the cable-type structure (75) of the first and second lifting mechanism comprises, respectively, two cable-type sub-structures (75) which connect the working platform (8) to the suspension device (6) on two sides of the cable (3) or of the fastening point.
2. Maintenance cage according to Claim 1 or 2, wherein the four cable-type sub-structures (75) support the work platform (8) at four corners.
3. Maintenance cage according to Claim 1 or 2, wherein the first and second suspension devices (6) each have a traverse (65), wherein the two cable-type substructures (75) of each of the first and second lifting mechanism connect on the two sides of the rope (3) or of the fastening point the work platform (8) with the cross member (65).
4. Maintenance cage for the maintenance of a cable car, having:

   a maintenance cage structure;

   a suspension device (6) for fastening the maintenance cage structure so as to be suspended from a cable (3) of the cable car, wherein the suspension device (6) has a first suspension device and a second suspension device, wherein the first suspension device is configured for fastening the maintenance cage structure so as to be suspended from a first fastening point on the cable (3) of the cable car, and the second suspension device is configured for fastening the maintenance cage structure so as to be suspended from a second fastening point on the cable (3) of the cable car; and

   a working platform (8) configured for transporting a maintenance technician to a maintenance location of the cable car and for carrying out the maintenance work at the maintenance location by the maintenance technician,

   wherein the maintenance cage structure has a lifting mechanism having a first lifting mechanism and a second lifting mechanism, wherein the working platform (8) is mounted between the first and the second lifting mechanism,

   wherein the first lifting mechanism is disposed in the maintenance cage structure at the side of the first suspension device, and the second lifting mechanism is disposed in the maintenance cage structure at the side of the second suspension device, such that the spacing of the working platform (8) from the cable (3) at the first fastening point can be adjusted by the first lifting mechanism and the spacing of the working platform (8) from the cable (3) at the second fastening point can be adjusted by the second lifting mechanism in a mutually different manner,

   characterized in that

   the first suspension device (6) and the second suspension device (6) enable a rotation of the working platform (8) about a vertical axis.
5. Maintenance cage according to Claim 5, wherein the first suspension device (6) and the second suspension device (6) enable a rotation of the working platform (8) about a vertical axis so that the maintenance cage can be conducted around the circulation points at the ends of the cable car.
6. Maintenance cage according to Claim 5 or 6, wherein the suspension device (6) has a joint (63) which allows the maintenance cage (5) to be rotatably mounted about the vertical axis (64).
7. Maintenance cage for the maintenance of a cable car, having:

   a maintenance cage structure;

   a suspension device (6) for fastening the maintenance cage structure so as to be suspended from a cable (3) of the cable car, wherein the suspension device (6) has a first suspension device and a second suspension device, wherein the first suspension device is configured for fastening the maintenance cage structure so as to be suspended from a first fastening point on the cable (3) of the cable car, and the second suspension device is configured for fastening the maintenance cage structure so as to be suspended from a second fastening point on the cable (3) of the cable car; and

   a working platform (8) configured for transporting a maintenance technician to a maintenance location of the cable car and for carrying out the maintenance work at the maintenance location by the maintenance technician,

   wherein the maintenance cage structure has a lifting mechanism having a first lifting mechanism and a second lifting mechanism, wherein the working platform (8) is mounted between the first and the second lifting mechanism,

   wherein the first lifting mechanism is disposed in the maintenance cage structure at the side of the first suspension device, and the second lifting mechanism is disposed in the maintenance cage structure at the side of the second suspension device, such that the spacing of the working platform (8) from the cable (3) at the first fastening point can be adjusted by the first lifting mechanism and the spacing of the working platform (8) from the cable (3) at the second fastening point can be adjusted by the second lifting mechanism in a mutually different manner,

   characterized in that

   the first and the second suspension device (6) each have a suspension linkage (61) and a fastening mechanism (62), wherein the suspension linkage (61) is able to be fastened to the cable (3), wherein the maintenance cage (5) by way of the fastening mechanism (62) is able to be fastened to the suspension linkage (61) such that the maintenance cage (5) is able to be fastened to different suspension linkages (61) of different cable cars.
8. Maintenance cage according to one of claims 1 to 7, wherein the lifting mechanism (7) is configured for lifting the position of the working platform (8) relative to the maintenance cage structure.
9. Cable car having a maintenance cage according to one of Claims 1 to 8.
10. Method for the maintenance of a cable car, said method comprising the following steps:

    - conveying a maintenance technician by a maintenance cage according to one of Claims 1 to 8 to a maintenance location, said maintenance cage being fastened so as to be suspended from a cable (3) of the cable car; and

    - carrying out the maintenance work at the maintenance location by the maintenance technician located on the working platform (8).
11. Method according to Claim 10, wherein the cable car at the maintenance location has a sheave assembly (2) and the maintenance work comprises the following steps:

    - securing the load of the sheave assembly (2) or of part of the sheave assembly on a support structure (1) of the sheave assembly (2) such that an axle (4) on which the sheave assembly (2) or part of the sheave assembly (2) is mounted is substantially free of any load and can be removed by the maintenance technician;

    - cleaning and/or checking the axle (4), wherein the sheave assembly (2) or a primary compensator (24) of the sheave assembly (2) is not transported away or remains in the secured position during cleaning and/or checking of the axle (4);

    - unlocking the load of the sheave assembly (2).
12. Method for the maintenance of a cable car, :

    a maintenance cage structure;

    a suspension device (6) for fastening the maintenance cage structure so as to be suspended from a cable (3) of the cable car, wherein the suspension device (6) has a first suspension device and a second suspension device, wherein the first suspension device is configured for fastening the maintenance cage structure so as to be suspended from a first fastening point on the cable (3) of the cable car, and the second suspension device is configured for fastening the maintenance cage structure so as to be suspended from a second fastening point on the cable (3) of the cable car; and

    a working platform (8) configured for transporting a maintenance technician to a maintenance location of the cable car and for carrying out the maintenance work at the maintenance location by the maintenance technician,

    wherein the maintenance cage structure has a lifting mechanism having a first lifting mechanism and a second lifting mechanism, wherein the working platform (8) is mounted between the first and the second lifting mechanism,

    wherein the first lifting mechanism is disposed in the maintenance cage structure at the side of the first suspension device, and the second lifting mechanism is disposed in the maintenance cage structure at the side of the second suspension device, such that the spacing of the working platform (8) from the cable (3) at the first fastening point can be adjusted by the first lifting mechanism and the spacing of the working platform (8) from the cable (3) at the second fastening point can be adjusted by the second lifting mechanism in a mutually different manner,

    wherein the first lifting mechanism has a cable-type structure (75) which connects the working platform (8) to the first suspension device (6), and a mechanism for adjusting the length of the cable-type structure (75) so as to adjust the spacing between the first suspension device (6) and

    the working platform (8); wherein the second lifting mechanism (7) has a cable-type structure (75) which connects the working platform (8) to the second suspension device (6), and a mechanism for adjusting the length of the cable-type structure (75) so as to adjust the spacing between the second suspension device (6) and the working platform (8)

    wherein said method comprising the following steps:

    conveying a maintenance technician to a maintenance location by a maintenance cage, said maintenance cage being fastened so as to be suspended from a cable (3) of the cable car; and

    carrying out the maintenance work at the maintenance location by the maintenance technician located on the working platform (8),

    wherein the cable car has a roller battery (2) at the maintenance location and the maintenance work is characterized by the following steps:

    Securing the load of the roller battery (2) on a support structure (1) of the roller battery (2), so that a main axis (4), on which the roller battery (2) is mounted, is basically load-free and can be removed by the maintenance technician;

    Cleaning and/or testing the main axis (4), wherein the roller battery (2) or a main rocker (24) of the roller battery (2) during cleaning and/or testing of the main axis (4) is not transported away or remains in the secured position;

    freeing the load of the roller battery (2).
13. Method for the maintenance of a cable car, :

    a maintenance cage structure;

    a suspension device (6) for fastening the maintenance cage structure so as to be suspended from a cable (3) of the cable car, wherein the suspension device (6) has a first suspension device and a second suspension device, wherein the first suspension device is configured for fastening the maintenance cage structure so as to be suspended from a first fastening point on the cable (3) of the cable car, and the second suspension device is configured for fastening the maintenance cage structure so as to be suspended from a second fastening point on the cable (3) of the cable car; and

    a working platform (8) configured for transporting a maintenance technician to a maintenance location of the cable car and for carrying out the maintenance work at the maintenance location by the maintenance technician,

    wherein the maintenance cage structure has a lifting mechanism having a first lifting mechanism and a second lifting mechanism, wherein the working platform (8) is mounted between the first and the second lifting mechanism,

    wherein the first lifting mechanism is disposed in the maintenance cage structure at the side of the first suspension device, and the second lifting mechanism is disposed in the maintenance cage structure at the side of the second suspension device, such that the spacing of the working platform (8) from the cable (3) at the first fastening point can be adjusted by the first lifting mechanism and the spacing of the working platform (8) from the cable (3) at the second fastening point can be adjusted by the second lifting mechanism in a mutually different manner,

    wherein the first lifting mechanism has a cable-type structure (75) which connects the working platform (8) to the first suspension device (6), and a mechanism for adjusting the length of the cable-type structure (75) so as to adjust the spacing between the first suspension device (6) and the working platform (8); wherein the second lifting mechanism (7) has a cable-type structure (75) which connects the working platform (8) to the second suspension device (6), and a mechanism for adjusting the length of the cable-type structure (75) so as to adjust the spacing between the second suspension device (6) and the working platform (8)

    wherein said method comprising the following steps:

    conveying a maintenance technician to a maintenance location by a maintenance cage, said maintenance cage being fastened so as to be suspended from a cable (3) of the cable car; and

    carrying out the maintenance work at the maintenance location by the maintenance technician located on the working platform (8),

    wherein the cable car has a roller battery (2) at the maintenance location and the maintenance work is characterized by the following steps:

    Securing the load of the roller battery (2) or a part of the roller battery (2) on a support structure (1) of the roller battery (2), so that an axis (4), on which the roller battery (2) or the part of the roller battery (2) is mounted, is basically load-free and can be removed by the maintenance technician;

    Testing the axis (4), wherein the roller battery (2) or a main rocker (24) of the roller battery (2) during testing of the axis (4) remains in the secured position; and

    freeing the load of the roller battery (2).
14. Method according to claim 13, wherein the axis (4) is tested with a test bench of the work platform (8) for magneto-inductive material testing.
15. Method according to one of claims 11 to 14, wherein

    - the axle (4) on a first side is partially extracted from a clearance (4') for the axle (4);

    - the part of the axle (4) partially extracted from the first side is cleaned and/or checked;

    - the axle (4) on a second side is partially extracted from the clearance (4'); and

    - the part of the axle (4) partially extracted from the second side is cleaned and/or checked.
16. Method according to Claim 15, wherein the axle (4) is extracted so far that the primary axle (4) on the extracted side is still situated in the clearance (4') of the support structure (1) and the clearance (4') of the primary compensator (24) and/or that the primary axle (4) on the side opposite the extracted side is extracted from the clearance (4') of the support structure (1).
17. Method according to Claim 15 or 16, wherein, while the axle (4) on the extracted side is being partially extracted from the clearance (4'), an auxiliary axle (96) on the side opposite the extracted side is inserted into the clearance (4') of the support structure (1) and of the primary compensator (24) until said auxiliary axle (96) on the side opposite the extracted side is situated in the clearance (4') of the support structure (1) and the clearance (4') of the primary compensator (24).
18. Method according to Claim 16 or 17, wherein, while the axle (4) on the extracted side is being partially extracted from the clearance (4'), a friction bearing on the side opposite the extracted side is removed from the clearance (4') and the friction bearing or a replacement friction bearing is re-inserted.
19. Method according to one of Claims 10 to 18, wherein the maintenance work comprises the following steps:

    - removing the axle (4) prior to cleaning and/or checking the axle (4); and

    - re-introducing the primary axle (4) after cleaning and/or checking the axle (4).
20. Method according to one of Claims 10 to 19, wherein the load is secured on a raising yoke (13) of the support structure (1).

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