Elevator system for a building under construction

Abstract

The following descriptions relate to an elevator system (1) for a building under construction, comprising an elevator shaft (2), a machine room platform (6) defining a usable travel path (3) in the elevator shaft (2) for driving a car (5) movable below the machine room platform (6), a lifting platform (10) with a lifting device (10.2) for raising the machine room platform (6) and an installation car (14) arranged above the lifting platform (10) in the elevator shaft (2), wherein the lifting device (10.2) projects upwards from the lifting platform (10) and wherein the installation car (14) has a closable opening (27) in a floor (14.1) for receiving the lifting device (10.2) in the interior of the installation car (14). The following descriptions relate to a method (40) for repositioning the lifting device (10.2) in such a lift system (1).

Description

Technical field

[0001] The following descriptions concern an elevator system for a building under construction, comprising an elevator shaft, a machine room platform defining a usable travel path in the elevator shaft for driving a car that can travel below the machine room platform, a lifting platform with a lifting device for raising the machine room platform, and an installation car arranged above the lifting platform in the elevator shaft.

[0002] Furthermore, the following explanations concern a procedure for relocating the lifting device in such an elevator system. Technical background

[0003] Elevator systems for transporting people and / or goods are an integral part of modern residential and commercial buildings. A typical elevator system comprises one or more elevator shafts, in each of which one or more cars are moved between landing positions by means of drives such as suspension drives or linear drives.

[0004] In tall buildings or those built underground, it is known to use the elevator shaft of an elevator system for transporting construction personnel and building materials even during the building's construction phase. As construction of such a building progresses, the elevator shaft is progressively lengthened, with the usable travel distance of the elevator car being regularly extended to serve the newly added floors. For this purpose, movable platforms are known that limit the usable travel distance and, in particular, accommodate components of the elevator system. Such platforms are moved into a newly constructed shaft section to extend the usable travel distance and, for example, form a movable machine room located above the elevator car.

[0005] With elevator systems of this type, known as "shaft climbers," extending the elevator shaft or travel path is relatively complex. There is a need to serve as many of the newly constructed floors as possible with a single travel path extension, partly to minimize the frequency of extensions during construction. To achieve this, the machine platform must be positioned as high as possible within the newly constructed floors during relocation to serve these upper levels.

[0006] Based on this situation, the task at hand is to enable the machine room platform to be moved as far as possible when extending the travel distance in a previously described elevator system. Description - Technical Solution

[0007] The present problem is solved by the features of the independent claims. Advantageous embodiments are specified in the dependent claims, the description, and the drawings. Where technically feasible, the teachings of the dependent claims can be combined arbitrarily with those of the main and dependent claims.

[0008] In particular, the problem is solved by an elevator system for a building under construction, comprising an elevator shaft, a machine room platform defining a usable travel path in the elevator shaft for driving a car that can travel below the machine room platform, a lifting platform with a lifting device for raising the machine room platform and an installation car arranged above the lifting platform in the elevator shaft, wherein the lifting device projects upwards from the lifting platform and wherein the installation car has a closable opening in its floor for receiving the lifting device in the interior of the installation car.

[0009] The following sections explain advantageous aspects and subsequently describe preferred modified embodiments. Explanations, particularly regarding advantages and definitions of features, are essentially descriptive and preferred, but not limiting, examples. If an explanation is limiting, this will be explicitly stated.

[0010] Where ordinal numbers, such as "first," "second," etc., are used, for example to designate a component, an element, a process step, or a process action, these ordinal numbers are solely for differentiation in the designation and do not indicate any dependencies or sequences. This means, in particular, that a device does not need to have a "first component" to have a "second component." A device can also have a "first component" and a "third component" without necessarily having a "second component." Multiple units with the same ordinal number are also possible, for example, multiple "first components."

[0011] According to the present understanding, an elevator system is designed, for example, with at least one elevator shaft and at least one car that can travel along a route in the elevator shaft, and can furthermore have several parallel routes in one elevator shaft with at least one car per route, as well as several elevator shafts with additional cars.

[0012] For example, a car is held and driven by a load-bearing element, with a drive device transmitting a drive torque to the load-bearing element via a drive shaft. The load-bearing element is engaged with the drive shaft, for example, by friction or positive locking, such as at a drive zone or a drive sheave. The load-bearing element is preferably connected to a counterweight associated with the car. The drive device is located, in particular, in a machine room above the respective travel path or in an upper section of an elevator shaft, the so-called headroom. A load-bearing element is, in particular, designed as a rope, belt, strap, chain, or the like and carries tensile loads in the direction of its longitudinal extension.

[0013] An elevator shaft is a shaft that extends over several floors of a building and has a cross-section designed for the passage of the elevator car. A travel path within the elevator shaft is defined in particular by one or more guide rails and end boundaries formed by a shaft floor and a shaft ceiling, which in the case of a shaft climber may each be designed as movable platforms.

[0014] Insofar as this document refers to an elevator system in a building under construction, the relevant concepts will be explained below with reference to a building extending upwards from the ground. These concepts also apply analogously to a building constructed underground. In the case of an elevator system that grows with the building under construction, a shaft climber, the travel path extends, for example, between the lowest landing position and a landing position on an already constructed floor. Above this floor is a machine room platform that houses the drive mechanism of a car that travels below. The car is then suspended from the drive mechanism by a cable and serves, for example, to facilitate access for construction personnel to an active construction phase and to transport building materials to this phase.As additional floors of the building are constructed, the machine room platform will be moved further upwards to provide access to landing positions for the new floors and subsequent construction phases via the elevator shaft. The elevator shaft will thus be extended to accommodate the newly constructed floors and landing positions. For this purpose, an installation car is provided in the elevator shaft above the machine room platform. This car will allow for shaft installations in newly constructed shaft sections and will assist in the relocation of the machine room platform.

[0015] A lifting platform is a platform designed to be movable within the elevator shaft and equipped with a lifting device that can raise another platform, such as the machine room platform. The lifting platform thus serves as a support when moving the heavier machine room platform, with the lifting device being appropriately dimensioned. In particular, the platforms arranged in the elevator shaft are therefore configured as a cascade. For example, the uppermost platform, located above the service car, is a shaft platform that supports a lifting mechanism for the service car and is relatively lightweight. The shaft platform can then be moved manually or with minimal mechanical effort to the next higher landing position.Using the installation cage attached to the shaft platform, the lifting platform located below can then be raised. This platform, due to its lifting mechanism, is significantly heavier than the shaft platform and therefore cannot be lifted manually. However, the lifting platform is still light enough to be lifted by the installation cage and its drive mechanism. The lifting mechanism, in turn, is designed with sufficient lifting power to raise the considerably heavier machine room platform.

[0016] An installation car is generally defined as one designed for installing elevator components within the elevator shaft. The installation car may be intended solely for installation work, without being equipped for the regular operation of the elevator, or it may be equipped for both tasks and used as a regular elevator car after installation. In particular, in the case of a shaft climber, an installation car is suspended from a shaft platform and has a drive device that allows it to ascend or descend along a support element guided on the shaft platform, with the installation car being guided, in particular, by guide rails already installed in the elevator shaft.The installation car, for example, is designed to be more open, allowing access to the walls of the elevator shaft from the installation car for shaft installations. For instance, the installation car's lifting capacity is only designed for loads necessary during installation, such as for one person, lifting the platform, and / or a specific quantity of work materials.

[0017] The solution to the problem with the aforementioned elevator system comprises the teaching that the installation car is designed so that it can be placed directly onto the lifting platform without having to maintain a distance corresponding to the lifting device arranged on the lifting platform. The lifting device is moved into the installation car through the opening. In this way, the installation car and the lifting platform can be positioned particularly close to each other and remain in this arrangement when the machine room platform is raised by the lifting device. The machine room platform can then be pulled particularly high into the newly constructed section of the elevator shaft, with the components arranged above it being particularly compact in relation to each other.The platforms are arranged in such a way that as many newly constructed floors as possible can be added to the travel path for the elevator car during the process of relocating the engine room. In particular, the installation car and the lifting platform together occupy at most the area of ​​the uppermost landing position, allowing the engine room platform to be moved to a lower landing position. The travel path can then extend to the third-highest landing position already constructed, and the engine room on / at the engine room platform can be designed to be sufficiently large to allow maintenance personnel to walk through it while standing upright.

[0018] The fact that the opening is designed to be closable prevents the risk of falling at the opening when it is open, especially when the installation car is used away from the lifting platform and consequently without a lifting device protruding into the opening, for example for installation work in newly constructed areas of the elevator shaft well before or after the machine room platform has been moved.

[0019] Alternatively or additionally, the opening can be closed by means of a flap. This allows for particularly easy closing of the opening, with the floor forming a flat surface for walking and working on when the flap is closed. Furthermore, a flap is also particularly easy to open and / or lock in the open position.

[0020] Alternatively or additionally, the elevator system can be equipped with a first sensor to detect the presence of the lifting device directly below the installation car. Advantageously, the data acquired by this first sensor can then be used to either enable or prevent the opening from being opened. If the installation car is not directly above the lifting platform or lifting device, the opening will necessarily remain closed to avoid the risk of falls whenever possible. The opening can then only be opened immediately before the lifting device moves into position. Even at this point, the lifting platform or lifting device positioned below the opening already creates a barrier.The lifting device eliminates or significantly reduces the risk of falling at the opening, and this reduced risk of falling persists when the lifting device moves into the interior.

[0021] Alternatively or additionally, the first sensor can be arranged on the installation car, with a triggering element for activating the first sensor located on the lifting platform. This triggering element is designed such that a change in the distance between the lifting device and the installation car results in a change in the positional relationship between the triggering element and the first sensor, ultimately triggering the first sensor. The triggering element is, for example, designed as a cantilever, a lever, or the like. The first sensor is thus easily actuated directly based on the positional relationship between the lifting device and the installation car, and is therefore easily configured to detect the presence of the lifting device.

[0022] Alternatively or additionally, the triggering element can be provided with a trigger curve, wherein a trigger button guided by the trigger curve is spaced relative to the first sensor depending on its position on the trigger curve. The trigger button, which is, for example, located between the first sensor and the triggering element or on the first sensor itself, thus follows the path of the trigger curve and actuates the first sensor when a sufficiently small distance between the trigger curve and the first sensor is reached. A trigger curve in conjunction with a trigger button provides a simple, cost-effective, and robust method for triggering the first sensor.

[0023] Alternatively or additionally, the installation car can be equipped with a second sensor to detect when the opening is closed. Advantageously, when the second sensor detects a closed state, it can be prevented from moving the installation car so far onto the lifting platform that the lifting device would enter the area of ​​the opening, and / or the data acquired by the second sensor can be used to authorize the installation car to move away from the lifting platform.

[0024] Alternatively or additionally, the installation car can be equipped with a third sensor to detect when the opening is open. Advantageously, when the third sensor detects an open state, the installation car can be prevented from moving away from the lifting platform and / or the car can be allowed to move towards the lifting platform, enabling the lifting device to enter the opening.

[0025] Alternatively or additionally, the lifting device can be designed as a winch. In this case, the lifting device is advantageously designed to lift the relatively high weight of the engine room platform and can be simple and compact.

[0026] Alternatively or additionally, the installation car and / or the lifting platform may be provided with fastening means for attaching the lifting platform to the installation car. Such fastening means can be designed, at a minimum, as holes for screwing in a connecting element, as clamps, hooks, or other types of rear grips. The lifting platform can then be easily and safely connected to the installation car after the lifting device has been fully retracted into the installation car, in order to move the lifting device, along with the installation car, or by means of the installation car's drive mechanism, into the elevator shaft.

[0027] Alternatively or additionally, the elevator system may be provided with a safety device, whereby the safety device only permits the opening to be opened when the lifting mechanism is directly below the installation car. According to the present understanding, a safety device is connected to at least one sensor, for example, the first sensor, the second sensor, and / or the third sensor, as well as to an actuator, and includes a data processing device for algorithmically processing the data acquired by the sensor and for generating control commands for the actuator. The actuator can, for example, lock or unlock the movement of the installation car or lock or unlock the opening. The actuator can be physical, for example, a closing device on a flap of the opening, or digital.

[0028] Alternatively or additionally, the safety device can be designed to allow the installation car to travel away from the lifting platform only when the opening is closed. This is advantageous when using the installation car away from the lifting platform or lifting device, for example, when carrying out installation work in a newly constructed section of the elevator shaft, as it reliably prevents the opening from being opened and thus avoids the risk of falling.

[0029] Alternatively or additionally, the safety device can be designed so that it only allows access to the lifting platform when the lifting device is present directly below the installation car and the opening is open. This advantageously prevents a collision between the lifting device and the installation car when the opening is closed, for example, with the opening's flap.

[0030] The problem is further solved by a method for relocating the lifting device in a previously described elevator system, comprising the steps of: moving the installation car towards the lifting platform until the presence of the lifting device is detected directly below the installation car, opening the opening, moving the installation car towards the lifting platform until the lifting device is received in the interior of the installation car, attaching the lifting platform to the installation car and moving the installation car with the lifting platform received on it.

[0031] It is preferred that the sequence of process steps can be varied, unless a specific sequence is technically required. However, the aforementioned sequence of process steps is particularly preferred. The method achieves the advantages described above with regard to the elevator system. In particular, the method achieves a particularly compact arrangement of the installation car and the lifting platform during the relocation of the machine room platform, so that the machine room platform can be positioned particularly high up in a newly constructed section of an elevator shaft in order to add as many newly constructed floors as possible to the travel path of the car. Brief description of the drawings

[0032] A preferred technical solution is explained in more detail below with reference to the accompanying drawings and preferred embodiments. The term "figure" is abbreviated as "Fig." in the drawings.

[0033] The drawings show Fig. 1 a schematic representation of a lift system designed to be extended as construction progresses during the building process, wherein Fig. 1 shows several steps of such an extension of the travel path in the elevator system; Fig. 2 a perspective view of a cut-out installation car and a cut-out lifting platform in an elevator system according to Fig. 1 in a spaced-apart state; Fig. 3a a perspective detail view of an opening of the installation car in a lift system according to Fig. 1 in an open state; Fig. 3b another perspective detail view of the opening according to Fig. 3a in an open state; Fig. 4 a detailed view of an area between the installation car and the lifting platform according to Fig. 2 in a state of approaching each other; Fig. 5 a perspective view of the cut-out installation car and the cut-out lifting platform in an elevator system according to Fig. 1 in a state of collision; and Fig. 6 a diagram of a process according to the present disclosure. Detailed description of the drawings

[0034] The described embodiments are merely examples that can be modified and / or supplemented in various ways within the scope of the claims. Each feature described for a particular embodiment can be used independently or in combination with other features in any other embodiment. Each feature described for an embodiment of a particular claim category can also be used accordingly in an embodiment of a different claim category.

[0035] Fig. Figure 1 shows an elevator system 1 with an elevator shaft 2 extending in the vertical direction V in several states 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, which occur during the extension of a travel path 3 in the elevator shaft 2 during the construction of a building according to the present disclosure. The elevator system 1 has a car 5 that can travel in the travel path 3 between landing positions 4.1, 4.2, 4.3, 4.4, 4.5, 4.6, 4.7, 4.8, 4.9, wherein the travel path 3 initially extends to the second landing position 4.2 in states 1.1 to 1.4 and to the sixth landing position 4.6 in state 1.6. Above the car 5, an engine room platform 6 is arranged as the upper boundary of the travel path 3. This platform is detachably supported in the area of ​​a shaft door opening 7 of the third landing position 4.3, which is initially located outside the travel path 3. Above the engine room platform 6, in the area of ​​a shaft door opening 7, is the fourth landing position 4.4, also initially outside the travel path 3, a lifting platform 10 is detachably supported, which will be described in more detail below. The car 5 is held on the machine room platform 6 by means of a lifting element 11 and driven by a drive device 12 located there.

[0036] Above the fourth landing position 4.4, five further floors with landing positions 4.5, 4.6, 4.7, 4.8, and 4.9 were constructed, the respective landing positions 4.5, 4.6, 4.7, 4.8, and 4.9 being defined by shaft door openings 7. In the area of ​​landing positions 4.5, 4.6, 4.7, 4.8, and 4.9, an installation car 14 is movably arranged, the installation car 14 having a drive device 15 and supported by a support element 16. The support element 16 is held by a deflection element 18 on a shaft platform 17, which is detachably supported in the area of ​​a shaft door opening 7 of the ninth landing position 4.9. The shaft platform 17 itself has only a few components, or the components arranged on it can be installed on the shaft platform 17 with little effort, so that the shaft platform 17 is relatively light and can be moved manually or with little mechanical effort to the next higher landing position 4.5, 4.6, 4.7, 4.8, 4.9 can be transported. On the shaft platform 17, in addition to the deflection device 18 for the lifting device 16, a first lifting device 19.1 and a second lifting device 19.2 are arranged, by means of which a first crane hook 20.1 and a second crane hook 20.2 can be raised. The installation car 14 and the car 5 are guided on guide rails 21.1, 21.2, with corresponding guide elements of the installation car 14 arranged on a lower or a downwardly extending area of ​​the installation car 14.

[0037] In the first stage 1.1 of the extension of the travel path 3, guide rail sections 23 are installed in the area of ​​the newly constructed landing positions 4.4, 4.5, 4.6, 4.8, 4.9 using the installation car 14 to extend the guide rails 21.1, 21.2 along the newly constructed landing positions 4.5, 4.6, 4.7, 4.8, 4.9. In the second stage 1.2 of the extension of the travel path 3, the installation car 14 is moved downwards towards the lifting platform 10 after the installation of the guide rails 21.1, 21.2 is completed. In the third stage 1.3 of the extension of the travel path 3, the installation car 14 has fully moved onto the lifting platform 10 and is connected to it. The lifting platform 10 has a lifting device 10.1 for raising the engine room platform 6, which, however, is not (yet) connected to the engine room platform 6 in the third state 1.3. The lifting device 10.1 is driven by a lifting device 10.2 extending upwards from the lifting platform 10, the lifting device 10.2 projecting into the installation car 14 through its floor 14.1 from the third state 1.3 onwards. The method 40, which is used to join the installation car 14 with the lifting platform 10, is explained in more detail below. In the fourth state 1.4 of the extension of the travel path 3, the lifting platform 10 is raised to the eighth landing position 4.8 by means of the installation car 14. In particular, no further load or personnel are provided in the installation car 14, so that the permissible load capacity of the installation car 14 or the drive device 15 is sufficient to raise the lifting platform 10. In the fifth state 1.5 of the extension of the travel path 3, the lifting platform 10 is supported in the area of ​​the shaft door 7 of the eighth landing position 4.8 and the engine room platform 6 is attached to the lifting device 10.1. The engine room platform 6 is engaged, and the lifting device 10.2 raises it to the seventh landing position 4.7. In the sixth state 1.6, the engine room platform 6 is supported in the seventh landing position 4.7, thus extending the travel path 3. The elevator car 5 can now travel along the extended travel path 3 to the sixth landing position 4.6.

[0038] Fig. Figure 2 shows an arrangement of the installation car 14 and the lifting platform 10 between the second state 1.2 and the third state 1.3 according to Fig. 1, wherein the installation car 14 has already moved to the vicinity, but not yet to the immediate vicinity, of the lifting platform 10. The lifting device 10.2 projects upwards from the lifting platform 10 and thus prevents the installation car 14 from moving directly up to the lifting platform 10. The installation car 14 therefore has a flap 26 in its floor 14.1, which is located in a Fig. The closed state shown in section 2 remains when the installation car 14 is used away from the lifting platform 10, for example during installation work in the first state according to Fig. 1. Flap 26 is placed in a Fig. 3a and Fig. The open state shown in 3b is converted to reveal an opening 27 in the floor 14.1 of the installation car 14 when the installation car 14 is in the immediate vicinity of the lifting platform 10 or the lifting device 10.2. This is achieved, for example, by a Fig. The first sensor 29.1, as shown in Figure 4, detects the presence of the lifting device 10.2 directly beneath the installation car 14 in order to enable the opening of the flap 26 or the opening 27. A release element 30 with a release cam 30.1 is arranged on the lifting device 10.2 for this purpose. A release button 31 is located in the area of ​​the release cam 30.1 and rolls along it. When the installation car 14 moves towards the lifting device 10.2, the release cam 30.1 moves the release button 31 sufficiently to actuate the first sensor 29.1, which is designed as a push button. Upon detection of the presence of the lifting device 10.2 by the first sensor 29.1, the opening of the flap 26 or the opening 27 can be enabled. After opening flap 26 or opening 27, the installation cage 14 is then raised up to the lifting platform 10, as shown in Fig. Figure 5 shows that the lifting device 10.2 then projects through the opening 27 into the interior of the installation car 14. In this state, the installation car 14 and the lifting platform 10 can be connected to each other by a connecting element 33 designed as a connecting plate or by several such connecting elements 33.

[0039] In the Fig. 3a and Fig. Figure 3b shows a second sensor 29.2 and a third sensor 29.3. The second sensor 29.2 is located at the opening 27 in an area where the flap 26 rests when closed and interacts with an actuating element 34 on the flap 26. The second sensor 29.2 is actuated by the actuating element 34 when the flap 26 is closed, so that the closed state of the opening 27 is detected by means of the second sensor 29.2. The third sensor 29.3 is located behind the flap 26. Fig. 3b transparently shown flap 26 is arranged in its open state and is actuated by the flap 26 when it is in the position shown in the Fig. 3a and Fig. The third sensor 29.3 is in the open position shown in Figure 3b. The third sensor 29.3 is therefore actuated by the flap 26 in the open state, so that the open state of the opening 27 is detected by means of the third sensor 29.3.

[0040] Fig.Figure 6 shows a diagram of a procedure 40 for repositioning the lifting device 10.2 in the elevator system 1. In a first step 41, the installation car 14 is moved towards the lifting platform 10 until the presence of the lifting device 10.2 is detected directly below the installation car 14. The presence of the lifting device 10.2 is detected in particular by the first sensor 29.1, but can also be detected by a person operating the installation car 14. In a second step 42, the flap 26 or the opening 27 is opened. This process takes place in particular after the flap 26 has been released, based on the data acquired by the first sensor 29.1. In a third step 43, with the flap 26 open, the installation car 14 is moved towards the lifting platform 10 until the lifting device 10.2 is received inside the installation car 14.In a fourth step 44, the lifting platform 10 is attached to the installation car 14, for example by means of the connecting element 33 or several connecting elements 33. In a fifth step 35, the installation car 14 with the lifting platform 10 attached to it is moved. Reference symbol list 1 elevator system 1.1 Initial state of the elevator system during the extension of the travel path 1.2 Second state of the elevator system during the extension of the travel path 1.3 Third state of the elevator system during the extension of the travel path 1.4 Fourth state of the elevator system during the extension of the travel path 1.5 Fifth state of the elevator system during the extension of the travel path 1.6 Sixth state of the elevator system during the extension of the travel path 2 elevator shafts 3 Route 4.1 First landing position 4.2 Second landing position 4.3 Third landing position 4.4 fourth landing position 4.5 fifth landing position 4.6 sixth landing position 4.7 seventh landing position 4.8 eighth landing position 4.9 ninth landing position 5 elevator car 6 Engine room platform 7 Shaft door opening 10 lifting platforms 10.1 Lifting equipment of the lifting platform 10.2 Lifting device of the lifting platform 11 Lifting equipment 12 Drive device 14 Installation lift 14.1 Floor of the installation elevator car 15 Drive device 16 Lifting devices 17 Shaft platform 18 Deflection devices 19.1 first lifting device 19.2 second lifting device 20.1 first crane hook 20.2 second crane hook 21.1 first guide rail 21.2 second guide rail 23 Guide rail section 26 Cap in the floor of the installation car 27 Opening in the floor of the installation elevator car 29.1 first sensor 29.2 second sensor 29.3 third sensor 30 Trigger element 30.1 Trigger curve of the trigger element 31 trigger buttons 33 Connecting element 34 Actuating element of the second sensor 40 Methods for repositioning the lifting device 41 First step - Moving the installation car to the lifting platform 42 Second step - Opening the flap / opening 43 Third step - Procedure of the installation car to the lifting platform 44 Fourth step - Attaching the lifting platform to the installation cage 45 fifth step - procedure of the installation car with lifting platform V vertical direction

Claims

[1] Lifting system (1) for a building under construction, comprising an elevator shaft (2); a machine room platform (6) defining a usable travel path (3) in the elevator shaft (2) for driving a car (5) that can travel below the machine room platform (6); a lifting platform (10) with a lifting device (10.2) for lifting the engine room platform (6); and an installation car (14) arranged above the lifting platform (10) in the elevator shaft (2); wherein the lifting device (10.2) projects upwards from the lifting platform (10); and wherein the installation car (14) has a lockable opening (27) in a floor (14.1) for receiving the lifting device (10.2) in the interior of the installation car (14). [2] Lifting system (1) according to claim 1, wherein the opening (27) can be closed by means of a flap (26). [3] Lifting system (1) according to claim 1 or 2, comprising a first sensor (29.1) for detecting the presence of the lifting device (10.2) directly below the installation car (14). [4] Lifting system (1) according to claim 3, wherein the first sensor (29.1) is arranged on the installation car (14) and wherein a triggering element (30) for triggering the first sensor (29.1) is arranged on the lifting platform (10). [5] Elevator system (1) according to claim 4, wherein the release element (30) has a release curve (30.1) and wherein a release button (31) guided on the release curve (30.1) is spaced apart from the first sensor (29.1) depending on its position on the release curve (30.1). [6] Lifting system (1) according to one of the preceding claims, wherein the installation car (14) has a second sensor (29.2) for detecting a closed state of the opening (27). [7] Lifting system (1) according to one of the preceding claims, wherein the installation car (14) has a third sensor (29.3) for detecting an open state of the opening (27). [8] Lifting system (1) according to one of the preceding claims, wherein the lifting device (10.2) is designed as a winch. [9] Lifting system (1) according to one of the preceding claims, wherein the installation car (14) and / or the lifting platform (10) have fastening means for attaching the lifting platform (10) to the installation car (14). [10] Lifting system (1) according to one of the preceding claims, comprising a safety device, wherein the safety device releases the opening (27) only when the lifting device (10.2) is present directly below the installation car (14). [11] Lifting system (1) according to claim 9, wherein the safety device releases a movement of the installation car (14) away from the lifting platform (10) only when the opening (27) is closed. [12] Lifting system (1) according to claim 9 or 10, wherein the safety device releases a method to the lifting platform (10) in the presence of the lifting device (10.2) directly below the installation car (14) only when the opening (27) is in an open state. [13] Method (40) for repositioning the lifting device (10.2) in a lift system (1) according to one of the preceding claims, comprising the steps: Moving (41) the installation car (14) towards the lifting platform (10) until the presence of the lifting device (10.2) is detected directly below the installation car (14); Opening (42) of the opening (27); Method (43) of the installation car (14) towards the lifting platform (10) until the lifting device (10.2) is received in the interior of the installation car (14); Attaching (44) the lifting platform (10) to the installation cage (14); and Method (45) of the installation hoist (14) with lifting platform (10) attached to it.

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