EP2512969B1 - Lift facility with double decker - Google Patents

Description

Technical area

The invention relates to an elevator installation with at least one elevator car carrier which can accommodate two or more elevator cars. Specifically, the invention relates to the field of elevator systems, which are designed as so-called biplane elevator systems.

State of the art

From the JP 10-236753 A is a double-decker elevator known. The known elevator has two cabins, which are arranged one above the other in a cabin frame. The two cabins are movable relative to each other here. For this purpose, hydraulic cylinders are arranged in a counterweight frame. About a traction sheave a traction cable is guided, which is connected on the one hand with the counterweight frame and on the other hand with the cabin frame. Furthermore, a second cable is guided next to the pull rope over a free-running disc, which is connected on the one hand with the hydraulic cylinders and on the other hand with one of the cabins. When the hydraulic cylinders actuate the second cable, the cabs are moved relative to each other.

The from the JP 10-236753 A known double-decker elevator has the disadvantage that the design is complex. On the one hand, the design of the counterweight frame is complicated because the hydraulic cylinders drive with the counterweight frame through the elevator shaft, which requires additional control. In addition, a cable guide for the second rope required. Here are also occurring during operation extensions or shortening, which relate to the traction cable and the second rope, possible, resulting in an undesirable relative movement between the two elevator cars.

Presentation of the invention

The object of the invention is to provide an elevator system, which has an improved structure. Specifically, it is an object of the invention to provide an elevator system which allows relative movement between at least two elevator cars with relatively little effort.

The object is achieved by an elevator system according to the invention with the features of claim 1.

The measures listed in the dependent claims advantageous refinements of the claim 1 elevator system are possible.

In this case, the elevator installation is movable with at least one elevator car carrier, which can be moved in a driving space provided for a travel of the elevator car carrier. A first elevator car is arranged on the elevator car carrier. In addition, at least one second elevator car is arranged on the elevator car carrier. An adjusting device is arranged in a lower end region of the travel space, with the first elevator car being adjustable in the direction of travel in the lower end region of the travel space by the adjusting device relative to the second elevator car.

In the embodiment of the elevator installation, the elevator cage carrier can be arranged in an elevator shaft which delimits the travel space, wherein a drive machine unit is provided which serves to actuate the elevator cage carrier. As a result, the elevator car carrier is movable along the intended roadway. In this case, the elevator car carrier can be suspended from a traction device connected to the elevator car carrier. The traction means may in this case be guided in a suitable manner via a traction sheave of the drive machine unit. In addition to the function of transmitting the force or the torque of the drive machine unit to the elevator car carrier in order to actuate the elevator car carrier, the traction means can also have the function of carrying the elevator car carrier. An actuation of the elevator car carrier here means, in particular, a lifting or lowering of the elevator car carrier, wherein the elevator car carrier can be guided by one or more guide rails.

It is advantageous that the first elevator car can be fixed with respect to the second elevator car, and that the fixing of the first elevator car with respect to the second elevator car can be released in the lower end region of the driving compartment. In this case, it is further advantageous that the elevator car carrier comprises a first elevator car carrier part and a second elevator car carrier part, that the first elevator car is connected to the first elevator car carrier part, that the second elevator car is connected to the second elevator car carrier part and that a connecting and locking device is provided connects the first elevator car carrier part in a closed state with the second elevator car carrier part and the Release connection in an open state. In the closed state, the elevator car carrier can be moved with the two elevator cars through the driving area, wherein a distance between the elevator cars is constant. For example, each upper floors lying one above the other can each have the same floor space. As a result, loading and unloading of the two elevator cars at the respective storeys can take place in the closed state. In the lower end of the driving range, for example, a basement or a lobby can be located. This can be done by loosening the connection between the two elevator car carrier parts an adjustment of the two elevator cars to each other. In this case, the first elevator car can be lowered and positioned in particular in the opened state. Then loading and unloading of the two elevator cabins with respect to the approached floors can take place. Subsequently, the first elevator car with the first elevator car carrier part can be raised again. Then the connection and locking device can connect the two elevator car carrier parts together again.

In this case, it is further advantageous that the connecting and locking device has at least one connecting element which, in the closed state, interacts with a connection point of the first elevator car carrier and / or with a connection point of the second elevator car carrier part. For example, the connecting element can be designed rod-shaped and, in the closed state, can be guided through through holes which are configured in the elevator car carrier parts. To release the connection between the elevator car carrier parts, the connecting element can be pulled out of the through holes, so that the opened state is accepted.

Furthermore, it is advantageous that the connecting and locking device is arranged on the second elevator car carrier part. The adjustment device advantageously serves for adjusting the first elevator car carrier part with the first elevator car. By arranging the connecting and locking device on the second elevator car carrier part, the adjusting device is relieved, since then the weight of the connecting and locking device in the opened state does not act on the first elevator car carrier part.

In an advantageous manner, a braking and / or holding device is provided, which serves for fixing the second elevator car in the driving area when the first elevator car is adjusted relative to the second elevator car. In this case, the second elevator car can be fixed, for example, via the second elevator car carrier part. Here, it is also advantageous that the braking and / or holding device cooperates with a hoistway and / or with a guide rail. Thus, the braking and / or holding device for fixing the second elevator car in the driving area can interact with a building structure or the like. When releasing the connection between the two elevator cars, only the weight of the second elevator car and possibly other components connected to the second elevator car, in particular of the second elevator car carrier, acts on the traction means. The traction means is thereby relieved one hand. However, the traction means on the other hand, for example, loaded with a counterweight, so that the differential force is applied to the traction sheave. This makes a corresponding Design of the traction sheave required so that the second elevator car is not moved upwards through the elevator shaft. However, a fixation of the second elevator car can be achieved by the braking and / or holding device, so that an equilibrium of forces is achieved.

It is also advantageous that the adjusting device is designed as a hydraulic adjusting device. This allows, among other things, a comfortable operation that is quiet and vibration-free.

Moreover, it is advantageous that the adjusting device is arranged in a pit of an elevator shaft and / or that the adjusting device is connected to a bottom of the elevator shaft. As a result, a simple configuration and an advantageous orientation of the adjustment is possible. Specifically, occurring compressive forces can be reliably absorbed and an acting for adjusting pressure force can be advantageously transferred from the adjustment to the first elevator car.

Moreover, it is advantageous for the first elevator car and the second elevator car to have a minimum basic distance in a ready-to-drive state in which the elevator car carrier can be moved through the travel area. In the lower end region of the travel area, the first elevator car can be lowered in a controlled manner, as a result of which the distance between the elevator cars and the minimum base distance increases. After loading and unloading the elevator cars, the first elevator car can then be raised again until the minimum basic distance between the two elevator cars is reached again.

Brief description of the drawings

• Fig. 1 eine Aufzuganlage in einer schematischen Darstellung entsprechend einem ersten Ausführungsbeispiel der Erfindung in einem geschlossenen Zustand einer Verbindungs- und Sperreinrichtung und
• Fig. 2 die in Figl. 1 dargestellte Aufzuganlage in einem geöffneten Zustand der Verbindungs- und Sperreinrichtung.

Preferred embodiments of the invention are explained in more detail in the following description with reference to the accompanying drawings, in which corresponding elements are provided with corresponding reference numerals. It shows:

• Fig. 1 an elevator system in a schematic representation according to a first embodiment of the invention in a closed state of a connecting and locking device and
• Fig. 2 in Figl. 1 elevator system in an open state of the connection and locking device.

Preferred embodiments of the invention

Fig. 1 shows an elevator system 1 with at least one elevator car carrier 2, which is movable in a provided for a drive of the elevator car carrier 2 driving space 3. The driving space 3 is provided in an elevator shaft 4 of a building. Here are several floors 5, 6 are provided, the breakpoints 5, 6 represent. Here are the floors 5, 6, the two lowest floors of the elevator system 1. About the floors 5, 6 there are usually a larger number of other floors or breakpoints.

The elevator car carrier 2 has in this exemplary embodiment a first elevator car carrier part 7 and a second elevator car carrier part 8. The elevator car carrier 2 has rollers 9, 10 which are attached to the second elevator car carrier part 8. To the rollers 9, 10 a traction means 11 is guided. The traction means 11 also runs around a traction sheave 12 of a drive machine unit 13. According to a current direction of rotation of the traction sheave 12 driven by the prime mover unit 13, the elevator car carrier 2 is moved up or down through the traction compartment 3. Thus, the elevator car carrier 2 with the two elevator car carrier parts 7, 8 drive through the driving space 3.

The elevator car carrier 2 accommodates a first elevator car 15 and a second elevator car 16. In this case, the first elevator car 15 is arranged on the first elevator car carrier part 7 and connected thereto. Furthermore, the second elevator car 16 is arranged on the second elevator car carrier part 8 and connected thereto. The first elevator car 15 has an exit level 17. In addition, the second elevator car 16 has an exit level 18. Between the two exit levels 17, 18, a distance 19 is defined. In the in the Fig. 1 illustrated basic position is a minimum base distance 20 between the two elevator cars 15, 16 predetermined, so that the distance 19 is minimal. The distance 19 is set here to the usual floor clearance, which is required with respect to the higher floors. However, the distance 19 is smaller than a floor distance 21 between the floors 5, 6, which are the lowest floors.

To start the floors 5, 6 of the elevator car carrier 2 is driven by appropriate actuation of the traction sheave 12 to a lower end portion 22 so that the exit level 18 of the second elevator car 16 at the Floor 6 is positioned. In this position, the elevator car carrier 2, in the Fig. 1 is shown, however, the exit level 17 of the first elevator car 15 is above the floor 5, since the distance 19 is smaller than the floor clearance 21.

When the second elevator car 16 stops at the floor 6, the first elevator car 15 disposed in the first elevator car carrier 7 is located in the lower end 22 of the car 3. Below the second elevator car carrier 8, the hoistway 4 has a pit 23 , In the pit 23, a hydraulic adjusting element 24 is arranged, which has a cylinder 25 and a piston 25 guided in the cylinder with a piston rod 26. The piston rod 26 can in this case be adjusted in a direction 27 upwards or in a direction 28 downwards. In the illustrated position of the elevator car carrier 2, the piston rod 26 is moved upward in the direction 27 until a plate-shaped end piece 29 connected to the piston rod 26 bears against an underside 30 of the first elevator car carrier part 7. In this case, the plate-shaped end piece 29 may also already be positioned in this position, so that the elevator cage carrier 2 travels up to the plate-shaped end piece 29.

The elevator installation 1 has a connecting and blocking device 35. The connecting and locking device 35 is arranged on the elevator car carrier 2. In this embodiment, the connecting and locking device 35 is arranged on the second elevator car carrier part 8 and connected to the second elevator car 16. In addition, the elevator installation 1 has a braking and / or holding device 36 for the second Elevator cabin 16 on. Here, the braking and / or holding device 36 is connected in this embodiment with the second elevator car carrier part 8. In the elevator shaft 4, a guide rail 37 is arranged, on which the elevator car carrier 2 is guided in a suitable manner. Specifically, this ensures a guidance during the actuation by the prime mover unit 13. In addition, the two elevator car carrier parts 7, 8 can also be guided separately on the guide rail 37. In this case, further guide rails can be provided. The braking and / or holding device 36 interacts with the guide rail 37. Here, the brake and / or holding device 36 ensures a fixation of the second elevator car 16, which is arranged in the second elevator car carrier part 8, on the guide rail 37 and thus in relation to the driving space 3.

The configuration of the elevator installation 1 is described below also with reference to FIGS Fig. 2 described in further detail.

Fig. 2 shows the elevator system 1 of the embodiment, when the connecting and locking device 35 is in an open state and when the brake and / or holding device 36 is in an activated state. In contrast, the shows Fig. 1 the elevator system when the connecting and locking device 35 is in a closed state and when the brake and / or holding device 36 is in a deactivated state.

When the first elevator car 15 is supported via the first car carrier part 7 on the hydraulic adjusting element 24, then the brake and / or Holding device 36 is actuated. Here is in the Fig. 1 the unactuated state of the braking and / or holding device 36 is shown and in Fig. 2 the actuated state is shown. In this case, for example, a pair of brake shoes of the brake and / or holding device 36 interacts with the guide rail 37. As a result, the second elevator car carrier part 8 with the second elevator car 16 is fixed in the travel compartment 3 in a stationary manner.

The connecting and locking device 35 has connecting elements 38, 39. In the closed state, the connecting elements 38, 39 are extended, so that they connect the elevator car carrier parts 7, 8 with each other. Here, the connecting element 38 cooperates at a connection point 40 with the first elevator car carrier part 7 and at a connection point 41 with the second elevator car carrier part 8. In this case, for example through holes in the elevator car carrier parts 7, 8 can be provided at the connection points 40, 41, into which the connecting element 38 engages. Correspondingly, connection points 42, 43 with respect to the connecting element 39 are provided on the elevator car carrier parts 7, 8. In the closed state, the connecting element 39 cooperates with the connection points 42, 43. When the brake and / or holding device 36 is activated, the connecting and locking device 35 is switched to the open state, the connecting elements 38, 39 retracting. The retracted state is in the Fig. 2 illustrated. As a result, the connection between the elevator car carrier parts 7, 8 is released. Then the piston rod 26 moves with the plate-shaped end piece 29 in the direction 28 down. This is achieved by a controlled discharge of a pressurized fluid from the cylinder 25. Here, the first elevator car carrier part 7 moves with the first elevator car 15 down. The distance 19 increases in this case. If the distance 19 is equal to the floor clearance 21, then the first elevator car carrier 7 is stopped with the first elevator car 15. The exit level 17 of the first elevator car 15 is now located on the floor 5. A distance 44 between the elevator cars 15, 16 has increased in this case compared to the minimum base distance 20.

In the in the Fig. 2 illustrated situation, the two elevator cars 15, 16 are loaded and unloaded from the respective approached floor 5, 6. Thus, a simultaneous loading and unloading of the two elevator cars 15, 16 is also possible at the floor distance 21, which differs from the usual floor space of the other floors on the elevator shaft 4.

After loading and unloading the elevator cars 15, 16, the piston rod 26 is adjusted in the direction 27. This is achieved by supplying pressurized fluid into the cylinder 25 by means of a pump. In this case, the distance 44 decreases. When the distance 44 reaches the minimum base distance 20, then the connecting and locking device 35 is actuated to connect the two elevator car carrier parts 7, 8 via the connecting elements 38, 39 with each other. Subsequently, the brake and / or holding device 36 is deactivated. Then the results in the Fig. 1 illustrated situation. Subsequently, the entire elevator car carrier 2 with the two elevator cars 15, 16 can be moved through the driving space 3 by the drive machine unit 13. The two elevator cars 15, 16 are then driven to their destination storeys. Here, the minimum basic distance 20 is specified between the elevator cars 15, 16, so that the distance 19 again corresponds to the usual floor distance. In this way, if necessary, both elevator cars 15, 16 can be loaded or unloaded simultaneously at the other floors.

Since the connecting and locking device 35 is arranged on the second elevator car carrier part 8, its mass or its weight need not be moved or applied by the hydraulic adjusting element 24. The same applies to the attached to the second elevator car carrier part braking and / or holding device 36. In this way, the hydraulic adjusting element 24 can be designed optimized. This also affects other components, in particular a pump. On the other hand, the hydraulic adjusting element 24 is arranged stationarily in the pit 23, so that the mass of the hydraulic adjusting element 24 does not have to be moved by the drive machine unit 13.

The hydraulic adjusting element 24 is connected to a bottom 45 of the pit 23. This results in an advantageous transmission of force, since the piston rod 26 is oriented parallel to the acting weight of the first elevator car carrier part 7 with the first elevator car 15. In this embodiment, the hydraulic adjusting element 24 forms a hydraulic adjusting device 24. Depending on the configuration of the elevator system 1, a plurality of hydraulic adjusting elements 24 may be provided to form the hydraulic adjusting device 24.

Thus, the two elevator cars 15, 16 in a running state, in which the elevator car carrier 2 through the driving space 3 is movable, have a minimum base distance 20. In the unlocked state, in which the connection between the elevator car carrier parts 7, 8 is released, a distance 44 between the elevator cars 15, 16 can be achieved which is greater than the minimum basic distance 20. In this case, the second elevator car 16 can be fixed via the brake and holding device 36. The first elevator car 15 can be adjusted with high efficiency. Here, the adjustment by means of the hydraulic adjusting element 24 is low in vibration and very quiet. This results in a high level of comfort.

The invention is not limited to the described embodiments.

Claims (10)

1. Lift installation (1) with at least one lift cage carrier (2), which is movable in a travel space (3) provided for travel of the lift cage carrier (2), a first lift cage (15), which is arranged at the lift cage carrier (2), at least one second lift cage (16), which is arranged at the lift cage carrier (2), and an adjusting device (24), characterised in that the adjusting device is arranged in a lower end region (22) of the travel space (3), wherein the first lift cage (15) is adjustable relative to the second lift cage (16) in travel direction in the lower end region (22) of the travel space (3) by the adjusting device (24).
2. Lift installation according to claim 1, characterised in that the first lift cage (15) is fixable with respect to the second lift cage (16) and that the fixing of the first lift cage (15) with respect to the second lift cage (16) is releasable in the lower end region (22) of the travel space (3).
3. Lift installation according to claim 1 or 2, characterised in that the lift cage carrier (2) comprises a first lift cage carrier part (7) and at least one second lift cage carrier part (8), that the first lift cage (15) is connected with the first lift cage carrier part (7), that the second lift cage (16) is connected with the second lift cage carrier part (8) and that a connecting and blocking device (35) is provided, which connects the first lift cage carrier part (7) in a closed state with the second lift cage carrier part (8) and releases the connection in an opened state.
4. Lift installation according to claim 3, characterised in that the connecting and blocking device (35) comprises at least one connecting element (38, 39), which in the closed state co-operates with a connecting point (40, 42) of the first lift cage carrier part (7) and/or with a connecting point (39, 43) of the second cage carrier part (8).
5. Lift installation according to claim 3 or 4, characterised in that the connecting and blocking device (35) is arranged at the second lift cage carrier part (8).
6. Lift installation according to any one of claims 1 to 5, characterised in that a braking and/or holding device (36), which is designed to fix the second lift cage (16) in the travel space (3) in a case of adjustment of the first lift cage (15) relative to the second lift cage (16), is provided.
7. Lift installation according to claim 6, characterised in that the braking and/or holding device (36) co-operates at least indirectly with a lift shaft (4) and/or at least indirectly with at least one guide rail (37).
8. Lift installation according to any one of claims 1 to 7, characterised in that the adjusting device (24) is constructed as a hydraulic adjusting device (24).
9. Lift installation according to any one of claims 1 to 8, characterised in that the adjusting device (24) is arranged in a pit (23) of a lift shaft (4) and/or that the adjusting device (24) is connected at least indirectly with a floor of a lift shaft (4).
10. Lift installation according to any one of claims 1 to 9, characterised in that the first lift cage (15) and the second lift cage (16) have a minimum basic spacing (20) in a travel-ready state in which the lift cage carrier (2) is movable through the travel space (3).

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