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EP-4739610-A1 - HEAVY-LOAD ELEVATOR SYSTEM COMPRISING A PLURALITY OF DRIVE MACHINES

EP4739610A1EP 4739610 A1EP4739610 A1EP 4739610A1EP-4739610-A1

Abstract

The invention relates to an elevator system (1) in particular in the form of a heavy-load elevator system for loads of more than 20 t. The elevator system comprises - a travelling component (3), such as, for example, an elevator car (5), which is able to move along a travel path (7); - a first drive machine (9) and a second drive machine (11); - a controller (13) for controlling an operation of both the first drive machine and the second drive machine; - a plurality of suspension means (15); and - a special fastening component (23). A first subgroup (17) of the suspension means extends between the travelling component and the first drive machine, while a second subgroup of the suspension means extends between the travelling component and the second drive machine. Ends (21) of both the first and the second subgroup of the suspension means are fastened here to the common fastening component. The fastening component is fixed to a part (25) of a building accommodating the elevator system or to the traveling component so as to be loadable in tension in a first direction (31) of the travel path and is able to move transversely to the travel path along a compensation path (35) in a second direction (33). This allows insufficient synchronization between the two drive machines to be compensated for or to be counteracted.

Inventors

  • CAPLAZI, Marco
  • ROBEK, Mihael

Assignees

  • INVENTIO AG

Dates

Publication Date
20260513
Application Date
20240701

Claims (15)

  1. 1. Elevator system (1) comprising: a travel component (3) that can be displaced along a travel path (7); a first drive machine (9) and a second drive machine (11); a controller (13) for controlling operation of both the first drive machine (9) and the second drive machine (11); a plurality of support means (15), wherein a first subgroup (17) of the support means (15) extends between the travel component (3) and the first drive machine (9) and wherein a second subgroup (19) of the support means (15) extends between the travel component (3) and the second drive machine (11); wherein support means ends (21) of both the first and the second subgroup (17, 19) of the support means (15) are fastened to a common fastening component (23); wherein the fastening component (23) is fixed to a building part (25) of a building accommodating the elevator system (1) or to the travel component (3) in a first direction (31) of the travel path (7) in a tensile manner, characterized in that the fastening component (23) is displaceable in a second direction (33) transversely to the travel path (7) along a compensation path (35).
  2. 2. Elevator installation (1) according to claim 1, wherein support means (15) of the first subgroup (17) on the one hand and support means (15) of the second subgroup (19) on the other hand are fastened to the fastening component (23) in such a way that, when all support means (15) are subjected to tensile stress, forces exerted by the support means (15) of the first subgroup (17) on the fastening component (23) are directed opposite to forces exerted by the support means (15) of the second subgroup (19) on the fastening component (23).
  3. 3. Elevator installation (1) according to one of the preceding claims, wherein the fastening component (23) comprises a rail (37) running in the second direction (33) and a carriage (39) displaceable along the rail (37), and wherein the support means ends (21) of the first and second subgroups (17, 19) of the support means (15) are fastened to the carriage (39).
  4. 4. Elevator installation (1) according to one of the preceding claims, further comprising a position measuring device (41) for measuring a current position of the fastening component (23) along the compensation path (35) and for generating a position signal indicating the current position.
  5. 5. Elevator installation (1) according to claim 4, wherein the controller (13) is configured to control the operation of the first and second drive machines (9, 11) taking into account the position signal.
  6. 6. Elevator installation (1) according to one of claims 4 and 5, wherein the controller (13) is configured to control the operation of the first and second drive machines (9, 11) taking into account a temporal change in the position signal.
  7. 7. Elevator installation (1) according to one of the preceding claims, further comprising a limit switch (43) at opposite ends of the compensation path (35), each limit switch (43) being configured and arranged to change a switching signal when the fastening component (23) reaches a predetermined end position (45) on the compensation path (35).
  8. 8. Elevator installation (1) according to claim 7, wherein the controller (13) and/or a safety circuit of the elevator installation (1) is configured to stop the operation of the first and second drive machines (9, 11) upon receiving a changing switching signal which indicates that the fastening component (23) has reached the end position (45).
  9. 9. Elevator installation (1) according to one of the preceding claims, further comprising an end stop (47) adjacent to opposite ends of the compensation path (35), the end stop (47) being configured to prevent displacement of the fastening component (23) beyond a position of the end stop (47).
  10. 10. Elevator installation (1) according to one of the preceding claims, further comprising a load measuring device (49) for measuring a force acting on the fastening component (23) parallel to the travel path (7).
  11. 11. Elevator installation (3) according to claim 10, wherein the load measuring device (49) has a respective force gauge (51) adjacent to opposite ends of the compensation path (35).
  12. 12. Elevator installation (1) according to one of the preceding claims, further comprising for each of the support means (15) a slack rope contact (53) which is interposed between one end of the respective support means (15) and the fastening component (23) and is configured to detect a state in which no tensile force is exerted on the fastening component (23) by the associated support means (15) and to generate a slack rope signal accordingly.
  13. 13. Elevator installation (1) according to claim 12, wherein the controller (13) is configured to control the operation of the first and second drive machines (9, 11) taking into account the slack rope signal.
  14. 14. Elevator installation (1) according to one of the preceding claims, wherein the elevator installation (1) is configured to displace the travel component (3) with a load of more than 201.
  15. 15. Elevator system (1) according to one of the preceding claims, wherein the driving component (3) is an elevator car (5), and wherein the elevator system (1) associated with the first drive machine (9) has at least one first counterweight (55) which is coupled to the elevator car (5) via the first subgroup (17) of the support means (15), and wherein the elevator system (1) associated with the second drive machine (11) has at least one second counterweight (57) which is coupled to the elevator car (5) via the second subgroup (19) of the support means (15).

Description

HEAVY-DUTY LIFT SYSTEM WITH MULTIPLE DRIVE MACHINES Description The present invention relates to an elevator system. In particular, the present invention relates to an elevator system with the aid of which particularly heavy loads can be transported. Elevator systems are used to transport people and/or other loads between different height levels in buildings. To do this, an elevator car is moved along a mostly vertical travel path, for example between different floors. In a frequently used type of elevator system, a drive machine is provided, for example in the form of an electric motor with a traction sheave, with the help of which a rope-like support in the form of one or more ropes or belts is moved, the support being coupled to the elevator car. In this case, the elevator system generally also has at least one counterweight, which is also coupled to the support, with a cabling being designed, for example with the help of deflection pulleys, in such a way that the counterweight and the elevator car move in opposite directions along their parallel travel paths, for example within an elevator shaft, driven by the drive machine. Elevator systems operated with support means can also be used in very tall buildings to overcome large differences in height. Elevator systems, as they are often used to transport people, are usually designed for loads of several hundred kilograms to a few tons. However, for special applications there may be a need for elevator systems that can transport much heavier loads. For example, heavy-duty elevator systems can be designed to transport loads of over 20 tons, sometimes even over 401. Such heavy-duty elevator systems are often operated with a hydraulic drive. However, it can also be advantageous, particularly for tall buildings, to operate heavy-duty elevator systems using rope-like support means. However, it has been observed that elevator systems cannot always be easily scaled up to accommodate larger load-bearing capacities. In particular, it has been observed that drive machines and/or support means cannot be made arbitrarily larger or stronger in order to be able to transport heavier loads. There may therefore be a need for an elevator system that can be used to transport heavy loads in particular reliably and safely. In particular, there may be a need for an elevator system that can be used to move heavy loads reliably, safely and/or efficiently over large differences in height using rope-like support means. Such a need can be met by the subject matter according to the independent claim. Advantageous embodiments are defined in the dependent claims and the following description or illustrated in the accompanying figures. EP159139981B1 discloses, in an elevator device, a balancing mechanism having a horizontally extending pivot shaft and a balancing main body pivotally mounted on a car about the pivot shaft. The balancing main body has a first rope connecting portion and a second rope connecting portion disposed on a side of the pivot shaft opposite to the first rope connecting portion. A main rope body has a first main rope wound around a first drive pulley and a second main rope wound around a second drive pulley. The first main rope has a first car end portion connected to the first rope connecting portion and a first counterweight end portion connected to a counterweight, and the second main rope has a second car end portion connected to the second rope connecting portion and a second counterweight end portion connected to the counterweight. CN103608280A discloses a tensioning arrangement for a traction device of an elevator, comprising at least one elevator car arranged to move up and down in an elevator shaft, and at least one or more balancing weights which are in turn connected to support the lift car by means of their own support means, for example by means of ropes or belts and pulleys; and a lift provided with at least one traction sheave or equivalent and also with at least one traction means such as belts, ropes or chains configured to convert the rotational movement of the traction sheave into movement of the lift car and the balancing weights. The traction means is fixed at at least one of its ends to the fixing means, thereby ensuring a substantially constant tension. According to a first aspect of the invention, an elevator system is described which has a travel component that can be moved along a travel path, a first drive machine and a second drive machine, a controller for controlling operation of both the first drive machine and the second drive machine, and a plurality of support means. A first subgroup of the support means extends between the travel component and the first drive machine. A second subgroup of the support means extends between the travel component and the second drive machine. Support means ends of both the first and the second subgroup of support means are attached to a common fastening component. The fastening component is fixed to