EP3478621B1 - Method for constructing a lift assembly with an adaptable usable lifting height - Google Patents

Description

The present invention relates to a method for setting up an elevator system in which at least one lifting process is carried out for the purpose of adapting a usable lifting height of the elevator system to an increasing height of the building, as well as an elevator system which is created according to such a method.

Before an elevator system can be operated in its normal mode of operation, it can already be installed in a building during a construction phase. The elevator system can then already be used during the construction phase for the vertical transport of people or material, with the usable lifting height of the elevator system being adaptable to its current height during the construction of the building and thus growing with the building. This means that separate external elevators, which are attached to the outside of the building, for example, can be completely or partially saved.

For example, it can be useful to mount the elevator system with an elevator drive machine, an elevator car and a counterweight in the elevator shaft provided for this purpose, if preferably several lower floors of the building were built at least in the area of the elevator shaft. The elevator car and other components of the elevator system can be attached to a drive platform, which can be raised to the next higher level, for example with a crane or other means, in order to increase the usable lifting height or the transport path of the elevator system.

For example, in such an elevator - usually referred to as a climbing lift - the guide rails of the elevator system can be attached successively during the construction phase in the elevator shaft, and the drive platform can be conveyed upwards along these guide rails if necessary. The drive platform can then be fixed at the desired higher level, for example with struts, which are pushed out of the drive platform into openings in the walls of the elevator shaft.

From the WO 00/50328 A2 a system for building an elevator is known. This system has a drive platform with an elevator machine, an elevator car and a counterweight being suspended from the drive platform via support cables. In order to adapt the delivery height of the elevator to an increasing building height, the drive platform be increased gradually. Furthermore, a compensation rope or a compensation rope is provided, which runs from the underside of the elevator car around deflection pulleys arranged below the elevator car and around a deflection pulley arranged on the counterweight to a rope clamping device. The compensating rope is fixed to the rope clamping device, wherein - after opening the rope clamping device - additional compensating rope can be fed from a rope reservoir through the opened rope clamping device when the drive platform is raised.

From the EP 2 711 324 A1 an elevator system is known whose lifting height can also be adapted to an increasing height of a building by gradually raising a supporting structure with a drive machine, on which two elevator units - an elevator car and a counterweight - are suspended via a traction device. The elevator system is characterized in that the same traction means serves both as suspension means and as compensation traction means, the traction means being continuously guided from the area above one of the elevator units along this elevator unit to the area below the same elevator unit and fixed to the elevator unit. In order to extend the traction mechanism required for lifting the support structure both in its suspension element area and in its compensation traction mechanism area, additional traction mechanism is supplied from a traction mechanism store, whereby at least two traction mechanism clamping devices fixing the traction mechanism must be released and tightened again after the traction mechanism has been supplied.

Both elevator systems have the considerable disadvantage that traction means clamping devices act on traction means areas which are later stressed as load-bearing means or compensation traction means running over sheaves. As a result of the clamping, individual wires and the entire wire rope structure of the suspension element can be deformed and weakened.

The object of the present invention is to propose a method for setting up an elevator installation with an adjustable lifting height and a corresponding elevator system which do not have the disadvantage mentioned.

There may be a need to use the same traction means, which can serve as suspension means and / or as traction means or as compensation traction means, during the entire construction phase of the building, to use a traction device several times in different elevators and / or to continue to use a traction device that was used during the construction phase during the permanent operating phase following the construction phase. Such a need can be met by the subject matter of the independent claims.

Advantageous embodiments are defined in the dependent claims.

The term “traction means” is to be understood in general terms and includes, for example, round ropes and belts that contain tension cords made of steel or plastics. In the following, traction means serving as support and traction means are referred to as support means for the sake of simplicity.

Possible features and advantages of embodiments of the invention can be viewed, inter alia and without restricting the invention, as being based on the ideas and findings described below.

According to a first independent claim, the invention relates to a method for setting up an elevator system in a building. The elevator installation comprises an elevator drive machine, an elevator car, a counterweight and at least one flexible suspension element. In the method, for the purpose of adapting a usable lifting height of the elevator system to an increasing height of the building, at least one lifting process is carried out in which a drive platform is raised which carries the elevator drive machine and, via the suspension element, the elevator car and the counterweight. In the method, a difference between a weight of the suspension element on the elevator car side and a weight of the suspension element on the counterweight side is essentially compensated for by means of at least one compensation traction device which is guided from an underside of the elevator car via a deflection device to the underside of the counterweight. The method is characterized in that the deflection device comprises two roller arrangements each with at least one deflection roller and the at least one compensation traction device is guided over at least one deflection roller each of the two roller arrangements in such a way that the compensation traction device forms a compensation traction device loop, before and / or during the lifting process the distance between the first roller arrangement and the second roller arrangement is reduced in such a way that from the at least one compensation traction means loop a sufficient amount of compensation traction means is released to carry out the lifting process.

According to a further independent claim, the invention relates to an elevator system which is designed to carry out the method according to the first independent claim.

The compensation traction means can be an elongated, flexible body - for example a wire rope or a flat belt - which has a suitable linear meter weight and is suitable for transmitting a tensile force along its longitudinal direction. Furthermore, the compensating traction device must be suitable for being deflected via deflection rollers. A deflection roller is preferably a disc-shaped deflection body which can be rotated about an axis of rotation and which comprises a resting zone for the compensation traction means on its periphery, on which the compensation traction means rests and is deflected. For compensation traction means with a round cross section, the resting zone usually has grooves arranged in the circumferential direction, and for flat compensation traction means the resting zone is at least approximately cylindrical.

The at least one compensating traction device arranged between the elevator car and the counterweight is guided via a deflection device which is mainly arranged in the lower area of the elevator system and which either has two relatively displaceable roller arrangements each with at least one deflection roller or a stationary roller arrangement with at least one stationary deflection roller and a displaceable roller arrangement comprises at least one displaceable pulley. In this case, the compensation traction device is guided over at least one deflection roller of both roller arrangements in such a way that the at least one compensation traction device forms at least one compensation traction device loop. A Kompensationszugmittelschleife contains a section of the Kompensationszugmittel which revolves in one or more revolutions of one or more pulleys of both roller arrangements and thereby forms a Kompensationszugmittelspeicher to which, if necessary, a sufficient amount or length of the compensation traction means for the extension of the weight compensation effective sections of the compensation traction means is removed.

Before and / or during the lifting process, the compensation device is adapted to the increased lifting height of the elevator installation due to the lifting process in that the The distance between the two roller arrangements with at least one deflection roller each is reduced so that a sufficient amount of the compensation traction device is released from the at least one compensation traction device loop for carrying out the lifting process. The abovementioned distance can be reduced by either reducing the distance between a stationary roller arrangement and a displaceable roller arrangement, or in that both roller arrangements are displaceable and are displaced in opposite directions.

In principle, there are several ways in which a lifting process in which the drive platform is raised can be carried out. In a preferred possibility, the elevator car is moved near the drive platform before the lifting process and is coupled to the drive platform, which can be done for example via a chain. During this process, the counterweight is lowered into its lowest position during operation, supported and, if necessary, secured. When lifting the drive platform and the elevator car, it is generally necessary that the suspension means and compensation traction means are tracked as synchronously as possible. The compensation traction means can be connected at one of its fastening points to the underside of the elevator car or it can run around a deflection pulley fastened to the elevator car. At its other fastening point, the compensation traction means can be connected to the underside of the counterweight, or it can run around a deflection roller attached to the counterweight below. When the drive platform and the elevator car are raised, the compensation device can now be adjusted by reducing the length of the compensation traction device guided and stored on the compensation traction device loop by reducing the distance between the two roller arrangements synchronously with the lifting of the drive platform, whereby a corresponding length of the compensation traction device for the extension of the effective part of the compensation traction means required during the lifting process of the drive platform or the elevator car is available. It can be useful to carry out at least some of these adjustment processes before the lifting process. In combination with additional measures, an adjustment can also be made after the lifting process. Such an adjustment after the lifting process can take place, for example, after the counterweight has been pulled up as a result of the lifting process.

In a preferred embodiment of the method, the deflection device with a stationary roller arrangement, which comprises at least one stationary deflecting roller, and with a displaceable roller arrangement, which comprises at least one displaceable deflecting roller, provided.
As a result, the simplest possible method is achieved, which can be implemented at the lowest possible cost.

In a further possible embodiment of the method, the amount of compensation traction means stored in the at least one compensation traction means loop is formed by a section of the at least one compensation traction means guided from the underside of the elevator car via the deflection device to the underside of the counterweight. This refinement of the method ensures that each time the drive platform is lifted - i. H. with each lifting operation - the required amount of compensation traction means can be fed to the sections of the compensation traction mechanism that are effective for weight compensation, without a fixing device clamping the compensation traction mechanism having to be released and tensioned again at another point of the compensation traction mechanism.

In a further possible embodiment of the method, a first fastening point of the compensation traction means on the elevator car and a second fastening point on the counterweight are at least indirectly fixed, or the compensation traction means is guided around a pulley connected to the elevator car and around a pulley connected to the counterweight. Of course, the compensation traction means is additionally guided around the rollers of the deflection device arranged at least partially in the lower region of the elevator system.
With the possibility of being able to choose between the two embodiments, it is achieved that either a single or a double weight compensation effect can be achieved with the same compensation traction means.

In a further possible embodiment of the method, the at least one compensating traction device is fixed to the elevator car and the counterweight by means of fixing devices, or to the elevator system by means of stationary fixing devices, the fixing devices being fixed before, during and after a lifting process - that is, until after the last lifting process has been completed. cannot be resolved.
This ensures that the Kompensationszugmittel after completion of the entire

Elevator system, d. This means that after a large number of lifting operations, the wire rope structure is not deformed or damaged and can therefore continue to be used without reducing the permissible tensile load.

In a further possible embodiment of the method, the compensation traction device is guided along the compensation traction device loop in a single revolution.
What is achieved thereby is that the roller arrangements of the deflection device can be implemented in a space-saving and cost-effective manner, although a larger displacement path of at least one of the roller arrangements must be accepted.

In a further possible embodiment of the method, the compensation traction device is guided with more than one revolution along the compensation traction device loop, or the compensation traction device is guided with a multiple reeving along the compensation traction device loop.
It is thereby achieved that the required displacement path of at least one of the roller arrangements can be reduced accordingly, but the roller arrangements of the deflection device take up more installation space and are less cost-effective to implement. Additional compensating traction means can be guided or stored around the compensation traction device loop, the dimensions of which in the direction of its displacement direction are usually limited by the available space, and released when the drive platform is lifted. In the case of a compensating traction mechanism loop with multiple reeving and vertically oriented displacement direction, compared to a compensating traction mechanism loop with only one revolution (single reeving), there is the advantage that the ratio between the height of the elevator system in the final state and the height of the elevator system when installing the compensating traction mechanism loop can be multiplied. Corresponding advantages can also be achieved if the compensation traction means is guided along a compensation traction means loop with at least one roller arrangement that can be displaced in the horizontal direction, or with horizontally displaceable deflection rollers.

In a further possible embodiment of the method, at least one of the roller arrangements used to form the compensation traction means loop is displaced with the aid of an electrically driven displacement device in order to reduce or reduce the distance between the two roller arrangements guiding the compensation traction means loop to enlarge.
With such a displacement device, which can comprise, for example, an electrically driven support drum or an electrically operated cable pull device, an effortless displacement of the roller arrangements and thus a comfortable tracking of the at least one compensation traction device can be achieved.

In a further possible embodiment of the method, both of the roller arrangements serving to form the compensation traction means loop are displaced in mutually opposite directions by means of at least one displacement device.
By moving the two roller arrangements in opposite directions, either the required number of revolutions of the compensation traction device along the compensation traction device loop or the displacement path of the individual roller arrangement can be reduced.

In a further possible embodiment of the method, at least one of the roller arrangements used to form the compensation traction means loop is displaced by means of the displacement device approximately synchronously with the lifting of the drive platform during the lifting process.
It can thus be achieved that while the drive platform is being raised, compensation traction means are released in such a way that the compensation traction means remains essentially stretched and thus does not lose its guidance through the deflection rollers. Depending on the application, however, alternatives to the displacement of the displaceable roller arrangement of the compensation traction means loop, which is synchronous with the lifting process, can also be implemented. For example, part of the displacement of the compensation traction device loop can already be carried out before the lifting process. It is also conceivable here that the lifting process is divided into partial steps. Partial feeding of the compensation traction mechanism from the compensation traction mechanism loop and partial lifting of the drive platform can then alternate. In this way it can be avoided that, for example, a lifting device, which is used to lift the drive platform, and a lifting device, which is used to move the compensation traction device loop, work against one another. This avoids additional tensile forces in the suspension element of the lifting device, in the hoist and in the compensation traction element, as well as corresponding forces in the components involved.

In a further possible embodiment of the method, the compensation traction means loop is arranged at least largely in the elevator shaft of the building assigned to the elevator system, with at least one of the roller arrangements of the deflection device being displaced essentially in a vertical displacement direction.
As a result, all the essential components can be arranged in the elevator shaft in which the elevator car is located. This makes it easier, in particular, to monitor the processes when the drive platform is raised.

In a further possible embodiment of the method, the compensation traction device loop is arranged at least partially in a further elevator shaft of the building that is not assigned to the elevator system.
It can thus be achieved that the elevator system can be equipped with the largest possible elevator car, since no space has to be kept free in the associated elevator shaft for the compensating traction mechanism loop to be dismantled after the construction phase has been completed.

In a further possible embodiment of the method, the compensation traction means loop is at least partially arranged in a room of the building that is not assigned to an elevator shaft, and / or at least one of the roller arrangements of the deflection device is shifted essentially in a horizontal displacement direction. Such an arrangement of the compensating traction device loop - for example in a hall of the building, in particular a parking garage - has the advantage that several adjacent elevator shafts of a building can be equipped with the largest possible elevator car, with a compensating traction device loop with a horizontal displacement direction being easier to assemble and adjust . In addition, this makes it possible to arrange a hoist or a cable pulling device, which is used to move the compensation pulling means loop, outside the elevator shaft in which the elevator car is located.

In a further possible embodiment of the method, elements used to form the compensation traction device loop are removed after the last lifting process, and after the last lifting procedure the deflection device of the elevator system is converted into a deflection device without a compensation traction device loop.

This achieves, among other things, that the compensating traction mechanism does not have to run around the deflection pulleys of the compensating traction mechanism loop in continuous operation, that the installation space of the compensating traction mechanism loop is available for another use, that parts of the compensating traction mechanism loop can be used again to set up another elevator system, and that the removed components no longer have to be checked and serviced.

Some of the possible features and advantages are described with reference to different embodiments. The features can be combined, adapted or exchanged in a suitable manner in order to arrive at further embodiments.

• Fig. 1A und 1B zeigen schematisch in Aufriss und Seitenriss eine Aufzugsanlage gemäss einer Ausführungsform der Erfindung.
• Fig. 2 zeigt schematisch eine Aufzugsanlage gemäss einer weiteren Ausführungsform der Erfindung.
• Fig. 3 zeigt eine weitere Ausführungsform der in Fig. 1 mit dem Bezugszeichen 35 bezeichneten Umlenkeinrichtung.
• Fig. 4 zeigt eine weitere Ausführungsform der in Fig. 1 mit dem Bezugszeichen 35 bezeichneten Umlenkeinrichtung in einer schematischen, räumlichen Darstellung.
• Fig. 5 zeigt eine weitere Ausführungsform der in Fig. 2 mit dem Bezugszeichen 35 bezeichneten Umlenkeinrichtung mit Kompensationszugmittelschlaufe in einer horizontalen Anordnung.

Embodiments are described below with reference to the accompanying drawings, wherein neither the drawings nor the description are to be interpreted as restricting the invention. The figures are only schematic and not true to scale. In the various figures, the same reference symbols denote the same or identically acting features.

• Figures 1A and 1B show schematically in elevation and side elevation an elevator installation according to an embodiment of the invention.
• Fig. 2 shows schematically an elevator installation according to a further embodiment of the invention.
• Fig. 3 shows a further embodiment of the in Fig. 1 with the reference numeral 35 designated deflection device.
• Fig. 4 shows a further embodiment of the in Fig. 1 with the reference number 35 designated deflection device in a schematic, three-dimensional representation.
• Fig. 5 shows a further embodiment of the in Fig. 2 with the reference numeral 35 denoted deflection device with compensation traction means loop in a horizontal arrangement.

Figure 1A shows schematically in an elevation an elevator installation 1 in an elevator shaft 2 of a building 3 is constructed. Figure 1B shows the same elevator installation 1 in a side elevation for a better understanding of the cable arrangement shown.
A method for erecting the elevator system 1 is also described on the basis of the elevator system 1.

The elevator installation 1 has an elevator drive machine 4, an elevator car 5, a counterweight 6 and at least one flexible suspension element 7. The elevator car 5 and the counterweight 6 are guided along guide rails (not shown). In the embodiment described, the elevator installation 1 is arranged at least essentially within the elevator shaft 2. The elevator shaft 2 is bounded laterally by shaft walls 8, 9. The elevator shaft 2 is delimited at the bottom by a floor 10. The elevator shaft 2 is in principle open at the top during the construction of the elevator installation 1, it being possible for suitable covers to be provided. When the building is completely erected, the elevator shaft 2 is closed at the top.

In the arrangement shown, a schematically shown lifting height 15 results for the elevator car 5, since the elevator car 5 can be moved at least approximately as far as the floor 10 and at least approximately as far as a drive platform 16. Starting from the illustrated position 17 of the elevator car 5, the elevator car 5 can thus still be moved upwards by a travel path 18 or down a travel path 19. This takes place by driving the suspension element 7 by means of the elevator drive machine 4

The drive platform 16 serves to support the elevator drive machine 4, which by means of a traction sheave 20 carries and drives the suspension element 7 and thus the elevator car 5 and the counterweight 6. Furthermore, in this exemplary embodiment, deflection rollers 21, 22 are mounted on the drive platform 16. When the drive platform 16 -d is raised as illustrated by the arrow 23. that is, during a lifting process for the purpose of adapting the usable lifting height of the elevator system to a current building height - the elevator drive machine 4 with the traction sheave 20 and the pulleys 21, 22 are thus moved upwards together.

The arrangement of the suspension element 7 can be adapted to the respective application. In this exemplary embodiment, one end 24 of the suspension element 7 is attached to the drive platform 16. From there, the suspension element 7 runs to the elevator car 5 and around a deflection roller 25 connected to the elevator cage 5. The suspension element runs from the deflection roller 25 7 first around the deflection roller 22 and then around the drive pulley 20, both of which are arranged on the drive platform 16. From the traction sheave 20, the suspension element 7 runs to a deflection roller 26 connected to the counterweight 6, revolves around it and then runs up to a suspension element clamp 27 attached to the drive platform 16. During elevator operation, the suspension element 7 is fixed in the area of the suspension element clamp 27. The suspension element clamp 27 is generally only opened during a lifting process in which the drive platform 16 is raised according to the arrow 23.
In this exemplary embodiment, the suspension element 7 runs after the suspension element clamp 27 around the deflection roller 21 and then down to a suspension element reservoir 28 which is located in the area of the floor 10. The suspension element can be tracked from the suspension element reservoir 28 when the lifting process takes place in which the drive platform 16 is raised according to the arrow 23.

According to the arrangement of the suspension element 7, a suspension element section 29 on the elevator car side and a suspension element section 30 on the counterweight side result. The suspension element section 29 on the elevator car side generates a suspension element weight F _{A on the} elevator car side. The counterweight-side suspension element section 30 generates a counterweight-side suspension element weight F _G. The elevator car-side suspension element weight F _A can be described as the force which, due to the mass of the elevator-car-side suspension element section 29, acts on the traction sheave 20 in addition to the elevator car in the direction of the elevator car 5. Correspondingly, the counterweight-side suspension element weight F _G can be described as the force which, due to the mass of the counterweight-side suspension element section 30, acts in addition to the counterweight in the direction of the counterweight 6 on the traction sheave 20.

Since the in the Figures 1A and 1B The arrangement shown, the elevator car 5 and the counterweight 6 are at least approximately at the same height, the elevator car-side suspension weight F _A and the counterweight-side suspension weight F _{G are} at least approximately the same, which is indicated by force arrows of the same length in FIG Fig. 1 is illustrated.

For comparison, the Fig. 2 The situation shown, in which the elevator car 5 is closer to the drive platform 16 than the counterweight 6, is used. Since the suspension element section 29 on the elevator car side is then considerably shorter than the counterweight-side Is suspension element section 30, the suspension element weight F _A on the elevator car side is also smaller than the suspension element weight F _G on the counterweight side. This is in the Fig. 2 illustrated by the fact that the force arrow F _{A is} shorter than the force arrow F _G.

Differences between the suspension element weight F _{A on} the elevator car side and the suspension element weight F _G on the counterweight side, with an otherwise unchanged configuration, become greater the greater the usable lifting height 15. This means that a compensation between the suspension element weight F _{A on} the elevator car side and the suspension element weight F _G on the counterweight side is of particular importance when large usable lifting heights 15 occur during the construction of the building and thus the construction of the elevator system. Because in addition to a load-dependent force, which can usually only be partially compensated by means of the counterweight 6, the difference between the elevator car-side suspension weight F _A and the counterweight-side suspension weight F _G acts on the traction sheave 20, or on the elevator drive machine 4 a compensation device 34 at least substantially compensates. Then essentially only a force which is dependent on the loading of the elevator car 5 and is not compensated by the counterweight 6 and which loads the traction sheave 20 with a torque. Differences between the suspension element weight F _{A on} the elevator car side and the suspension element weight F _G on the counterweight side are at least substantially compensated by the compensation device 34, so that in this regard no additional torque acts on the drive pulley 20.

The compensation device 34 comprises a flexible compensation traction means 36, which is guided from an underside of the elevator car 5 via a deflection device 35 arranged in the lower region of the elevator system to an underside of the counterweight 6. In an imaginary snapshot, the compensation traction device 36 can be divided into sections 37, 38, 39. The sections 37, 38 hang essentially freely on the elevator car 5 or on the counterweight 6. The mass of the compensation traction device 36 in section 37 generates a force F ₁ , which can also be described as the compensation traction device weight F _{1 of} the compensation traction device 36 in section 37. Correspondingly, the mass of the compensation traction device 36 in section 38 generates a force F ₂ , which can also be described as the compensation traction device weight F _{2 of} the compensation traction device in section 38.

The compensation device 34 is designed so that the sum of the suspension center weight F _A and the compensation center weight F _{1 is} at least approximately equal to the sum of the suspension center weight F _G and the compensation center weight F ₂ . This equation applies regardless of the current position of the elevator car 5 or the counterweight 6. That is, this equation applies at any time when the elevator car 5 travels up the route 18 or down the route 19. If the elevator car 5 travels downwards, for example, along the track 19, the compensation weight F ₁ decreases to the same extent as the suspension weight F _A increases, while the compensation weight F _{2 increases} to the same extent as the suspension weight F _G decreases. The section 37 of the compensation pulling means 36 is shortened here, while the section 38 of the compensating pulling means 36 is lengthened.

The compensation device 34 comprises the deflection device 35, which has a compensation traction device loop 40. The section 39 of the compensating traction mechanism 36 is located in the compensating traction mechanism loop 40. It goes without saying that the compensating traction mechanism 36 also runs through the compensating traction mechanism loop 40 during operation, the division into sections 37 to 39 being possible in a snapshot. The compensation traction device loop 40 is arranged in such a way that the mass of the compensation traction device 36 located in the compensation traction device loop 40, i.e. the mass of the section 39 of the compensation traction device 36, contributes neither to the force F ₁ nor to the force F ₂ . Here, the compensation traction means loop 40 is also implemented in such a way that direction-dependent forces, in particular friction forces such as rolling friction forces, are avoided as far as possible. As a result, the influence of the guidance of the compensation traction mechanism 36 through the compensation traction mechanism loop 40 on the forces F ₁ , F _{2 is kept} as low as possible.

In this embodiment, stationary deflection rollers 41, 42 and displaceable deflection rollers 43, 44 are used to form the compensation traction means loop 40. The stationary deflection rollers 41, 42 are in this case in a stationary roller arrangement 45 and the displaceable deflection rollers 43, 44 are arranged in a displaceable roller arrangement 49. The displaceable roller arrangement 49 can be displaced by means of a displacement device 46. In this exemplary embodiment, the displacement device 46 is used to raise and lower the displaceable roller arrangement 49 in a vertical displacement direction 48. The displaceable roller arrangement 49 is sufficiently large for lowering Own weight realized. As a result, it is sufficient that the displacement device 46 is designed as a hoist with a transmission element 47 that can only be subjected to tension. For example, the transmission element 47 can be designed here as a cable of a cable pull device. The displacement device could also have transmission elements that can be loaded with tension and compression, for example threaded rods. The displacement device 46 could thereby restrict the freedom of movement of the displaceable roller arrangement 49 both in the displacement direction 48 and against the displacement direction. The displaceable roller arrangement 49 can be displaceable along a guide or also without a guide.
By means of the displacement device 46, the displaceable deflecting rollers 43, 44 serving to form the compensation traction means loop 40 can be displaced together by displacing the displaceable roller arrangement 49. The displacement device 46 can in particular be designed as an electric or as a manually operated hoist.

Furthermore, the displacement device 46 can operate synchronously with a lifting of the drive platform 16, so that the displacement of the displaceable deflection rollers 43, 44 takes place synchronously with the lifting 23 of the drive platform 16 during a lifting process.

Thus, before and / or during and / or after the lifting process in which the drive platform 16 is raised, the compensation device 34 can be adapted to the lifting height 15 of the elevator installation 1 that is increased by the lifting process. This is done by changing the compensation traction device loop 40 along which the compensation traction device 36 is guided. Before and / or during the lifting process, a distance between the two roller arrangements 45, 49 is reduced so that an amount of the compensating traction mechanism 36 required for carrying out the lifting process is released from the compensating traction mechanism loop 40. In this exemplary embodiment, a first fastening point 50 of the compensation traction means 36 is connected to the elevator car 5 by means of a fixing device 50.1. The second fastening point 51 of the compensation traction means 36 is connected to the counterweight 6 by means of a fixing device 51.1. In this arrangement, in the course of a lifting process, the sections 37, 38 of the compensation traction means 36 are lengthened by the same total length as the suspension means sections 29, 30 are lengthened overall. As a result, the equilibrium between the weight forces acting on the traction sheave of the suspension means and compensation traction means on the elevator car side and on the counterweight side is maintained at every operating height of the elevator system.

In this exemplary embodiment, the compensation traction device 36 is guided downward from the elevator car 5 to the deflection device 35, which initially corresponds to the section 37 of the compensation traction device 36. Subsequently, the compensation traction device 36 is guided over the deflection roller 52 of the deflection device 35 and the stationary deflection roller 41 of the compensation traction device loop 40, from the fixed deflection roller 41 the compensation traction device 36 is then up again, around the displaceable deflection rollers 43, 44 of the compensation traction device loop 40, and then guided back down to the stationary deflecting roller 42, which forms a second stationary deflecting roller of the compensation traction means loop 40. The length of the compensation traction means 36 between the stationary deflecting roller 41 and the stationary deflecting roller 42 corresponds overall approximately to the section 39. From the stationary deflecting roller 42, the compensating traction means 36 is then guided up to the counterweight 6 via the deflecting roller 53 of the deflecting device 35, which corresponds to the section 38 corresponds. The compensation traction device 36 is thus continuously guided from the elevator car 5 via the compensation traction device loop 40 to the counterweight 6. The section 39 of the compensation traction means 36 thus essentially forms the amount of the compensation traction means guided from the underside of the elevator car 5 via the deflection device 35 to the underside of the counterweight, which is stored in the compensation traction means loop 40.

The compensation traction means 36 is therefore guided over at least one stationary deflection roller 41, 42 serving to form the compensation traction means loop 40 and at least one displaceable deflection roller 43, 44 serving to form the compensation traction means loop 40, the at least one displaceable deflection roller 43, 44 relative to the at least one stationary Deflection roller 41, 42 is displaced in order to change the compensation traction means loop 40 and thus the amount or length of the compensation traction means stored in the compensation traction means loop. In this embodiment, two displaceable deflection rollers 43, 44 used to form the compensation traction device loop 40 are shifted by means of the displacement device 46 in order to change the compensation traction device loop 40 or to release an amount of the compensation traction device 36 required to carry out the lifting process. In a modified embodiment, a different number of displaceable deflection rollers 43, 44 can also be provided. A different number of stationary deflecting rollers 41, 42 can accordingly be provided.

In the illustrated guidance of the compensation traction mechanism 36, the compensation traction mechanism loop 40 is arranged in the elevator shaft 2 in which the elevator car 5 of the elevator installation 1 is located. The compensation traction means loop 40 is thus located in the elevator shaft 2 assigned to the elevator installation 1.

After the last lifting process, in which the drive platform 16 is raised to its end position and the usable lifting height 15 is thus equal to the end height 15, the elevator installation 1 can be partially converted. In particular, the elements 41 to 49 used to form the compensation traction means loop 40 can be removed. In particular, the stationary deflection rollers 41, 42, the displaceable roller arrangement 49 with the displaceable deflection rollers 43, 44, the displacement device 46 and the transmission element 47, which in this exemplary embodiment can be subjected to tensile loads, can be removed. In this case, the stationary deflecting rollers 41, 42 can be dismantled or also used in a correspondingly changed arrangement in order to guide the compensation traction means 36. Thus, at least some of the elements 41 to 47 can be used again. The guidance of the compensation traction means 36 can hereby be simplified, so that there are then fewer deflection points around which the compensation traction means is guided. As a result of the conversion of the compensation device 34 of the elevator installation 1 that takes place after the last lifting process, a compensation device 34 without a compensation traction device loop 40 is created in this way.

Fig. 2 shows schematically an elevator installation 1 according to a further embodiment of the invention. Here is in the Fig. 2 presented a situation in which compared to the Fig. 1 the elevator car 5 is located further up in the elevator shaft 2, while the counterweight 6 is located further down in the elevator shaft 2. As a result, the counterweight-side suspension element section 30 of the suspension element 7 is now longer than the elevator-car-side suspension element section 29. Accordingly, the counterweight-side suspension element weight F _{G is} greater than the elevator car-side suspension element weight F _A.

In this exemplary embodiment, the compensation device 34 is partially arranged outside the elevator shaft 2. A part 55 of the compensation device 34 is located in the elevator shaft 2, while the compensation traction means loop 40 is located outside the elevator shaft 2. In the room in which in this embodiment the compensation traction means loop 40 is located, in this exemplary embodiment it is a further elevator shaft 54, which is preferably not yet used for an elevator installation. For example, when the building is being erected, an arrangement of several elevator systems, which includes the elevator system 1, can be planned. During the construction phase of the building, for example, only the elevator system 1 can be implemented as an elevator system 1 that grows with the increasing building height. Further elevator systems, one of which will be set up in the further elevator shaft 54, will only be erected after the building has been completed. The further elevator shaft 54 can then advantageously serve to accommodate the compensation traction means loop 40. This has the advantage that the space requirement of the compensation traction device loop 40 in the elevator shaft 2 of the elevator installation 1 does not have to be taken into account. Furthermore, this can also simplify the attachment of the displacement device 46, which is designed, for example, as a hoist.

In this exemplary embodiment, the stationary deflection rollers 41, 42 of the compensation traction means loop 40 are arranged in the elevator shaft 2 on the floor 10. Deflection rollers 56, 57 are also arranged on the floor 10 of the further elevator shaft 54. A passage 75 is left free in the shaft wall 8 of the elevator shaft 2 between the stationary deflection rollers 41, 42 and the deflection rollers 56, 57. The compensation traction means loop 40 also has the displaceable deflection roller 43. The displaceable deflection roller 43 can be displaced together with the displaceable roller arrangement 49 by the displacement device 46, the displacement device in the present exemplary embodiment being designed as a rope hoist.

In this exemplary embodiment, the compensation traction means 36 is partially guided through the elevator shaft 2, which is assigned to the elevator installation 1 that grows with the increasing building height, and partially through the further elevator shaft 54. Here, a first fastening point 58 of the compensation traction means 36 is fixed to the floor 10 of the elevator shaft 2 by means of a fixing device 58.1. Starting from its first fastening point 58, the compensation traction device 36 runs vertically upwards through the elevator shaft 2 to the elevator car 5 and there around a deflection roller 60 attached to the elevator car 5. From the deflection roller 60, the compensation traction device 36 runs vertically downwards again and over the deflection roller 56 to the stationary pulley 41 of the stationary roller arrangement 45 installed in the further elevator shaft 54 Compensating traction means 36 from the fixed deflection roller 41 vertically upwards and around the displaceable deflection roller 43 of the displaceable roller arrangement 49. The compensation traction means 36 then extends vertically downwards again to the fixed deflection roller 42 of the stationary roller arrangement 45 and then runs to the deflection roller 57 on the ground 10 of the elevator shaft 2, which deflection roller 57 deflects the compensating traction means 36 in such a way that it runs vertically upwards to a deflection roller 61 attached to the counterweight 6. The compensation traction means 36 runs around this deflection roller 61 and then extends downward to its second fastening point 59, at which the compensation traction means 36 is fixed to the floor 10 by means of a fixing device 59.1.

With this arrangement of the compensation traction means 36, the section 37 of the compensation traction means 36 effective on the elevator car side for balancing the weight of the suspension element comprises both the compensation traction means 36 between its first fastening point 58 and the deflection roller 60 on the elevator car 5 and the compensation traction means 36 between the deflection roller 60 and the deflection roller 56 .
Corresponding to the mass of the compensation traction means 36 in section 37, the compensation traction means weight F ₁ loading the elevator car 5 results. Analogously to this, the section 38 of the compensation traction means 36 effective on the counterweight side for balancing the weight of the suspension element comprises both the compensation traction means 36 between the deflection roller 57 and the deflection roller 61 on the counterweight as well as the compensation traction means 36 between the deflection roller 61 and the second fastening point 59 of the compensation traction means 36 at the in Fig. 2 The illustrated elevator installation requires an adaptation of the compensation traction means 36 with regard to its mass per unit length. In this case, the compensation traction means 36 must have half as large a mass per unit length as the suspension means 7.

In this exemplary embodiment, the compensation traction means 36 can be guided around a deflection roller 60 connected to the elevator car 5. Furthermore, in this embodiment, the compensation traction means 36 can be guided around a deflection roller 61 connected to the counterweight 6.

When the drive platform 16 is raised in the direction marked with the arrow 23, during which lifting a required length of suspension element 7 is to be supplemented from the suspension element reservoir 28, the displaceable roller arrangement 49 must be connected to the displaceable Deflection roller 43 can be lowered by means of the displacement device 46 in order to release the required amount or length of the compensation traction means 36 from the compensation traction means loop 40. The lowering of the displaceable deflection roller 43 does not necessarily have to take place synchronously with the raising of the drive platform, but can be carried out before and / or during and / or after the raising of the drive platform 16. Furthermore, the compensation traction means 36 can also be tensioned by shifting the displaceable deflection roller 43 in the opposite direction, so that the distance between the displaceable deflection roller 43 and the stationary deflection rollers 41, 42 increases. For example, before the lifting process, the displaceable deflection roller 43 can be lowered in the displacement direction 48 by a distance that is sufficient to release the amount of compensation traction means 36 required for the lifting process plus a certain reserve. The lifting process of the drive platform 16 can then be carried out. After the lifting process, the certain reserve can be compensated again in that the displaceable deflection roller 43 is displaced in the opposite direction. As a result, the compensation traction means 36 is tensioned. Such a process can also be carried out in a corresponding manner in other embodiments or modified configurations.

Fig. 3 shows a further embodiment of the in Fig. 1 with the reference numeral 35 designated deflection device. In this embodiment, a compensation traction means loop 40 with multiple reeving is provided. The multiple reeving concerns the section 39 of the compensation traction device 36, which represents the stored quantity of the compensation traction device 36. In addition to the displaceable deflection rollers 43, 44, further displaceable deflection rollers 67 to 69 are arranged on the displaceable roller arrangement 49. Furthermore, in addition to the stationary deflection rollers 41, 42, further stationary deflection rollers 63 to 66 of the stationary roller arrangement 45 are arranged on the floor 10. In this way, the compensation traction means loop 40 can, for example, with the aid of FIG Fig. 1 described elevator system 1 are used. With certain adjustments, a compensation traction means loop 40 with the one shown in FIG Fig. 3 Multiple reeving shown also in the case of the Fig. 2 described elevator system 1 are used.

When using the Fig. 3 described embodiment, the displacement of the displaceable pulleys 43, 44, 67, 68, 69 belonging to the displaceable roller arrangement 49 takes place together. However, modifications are also conceivable in which one or more of the deflection rollers 43, 44, 67 to 69 of a multiple reeving are displaceable separately from one another.

Fig. 4 shows a further embodiment of the deflecting device 35 with compensation traction means loop 40, the effect of which is the same as in FIG Fig. 1 corresponds to the deflection device designated by the reference numeral 35, in a schematic, spatial representation. In this embodiment, stationary deflection rollers 41, 42, 70, 71 are arranged in a stationary roller arrangement 45 on the floor 10. Furthermore, displaceable deflection rollers 43, 44, 72, 73 are arranged in a schematically illustrated displaceable roller arrangement 49. Both the stationary deflection rollers and the displaceable deflection rollers are designed as disks which can be rotated independently of one another and have guide grooves for the compensation traction means 36. Coming from the stationary deflecting roller 41, the compensation traction means 36 first runs to the displaceable deflecting roller 43. From the displaceable deflecting roller 43, the compensating traction means 36 then continues over the displaceable deflecting roller 44 and then down to the stationary deflecting roller 71 of the stationary roller arrangement 45 on the floor 10 From the stationary deflecting roller 71, the compensating traction device 36 runs on to the stationary deflecting roller 70 and then up to the displaceable deflecting roller 72. The compensating traction device 36 then runs over the displaceable deflecting roller 73 and back down to the stationary deflecting roller 42 on the floor 10. The course of the compensation traction mechanism 36 in the area of the compensation traction mechanism loop 40 is thus described. This cable guide results in an additional circuit of the compensating traction device 36 along the compensating traction device loop 40. In a corresponding manner, several additional circuits - ie a so-called multiple reeving - can also be implemented. Additional revolutions make it possible to store a greater length of the compensation traction means 36 with comparable dimensions, so that when the displaceable roller arrangement 49 is lowered by a certain distance in the displacement direction 48, a quantity of the compensation traction means 36 is released from the compensation traction means loop 40, the length of which is a multiple of mentioned path corresponds.

Based on the Fig. 4 The embodiment of the compensation traction means loop 40 described can advantageously be used with the aid of FIG Fig. 1 described elevator system 1 are used. With a corresponding modification, the based on the Fig. 4 Compensating traction means loop 40 also described with reference to FIG Fig. 2 described elevator system 1 are used.

Possibilities are thus described in which a distance between the deflection rollers of a compensation traction means loop 40 can be changed at least substantially in a vertical direction 46, as can be seen from FIG Figs. 1 to 4 is described. It goes without saying, however, that with a correspondingly modified configuration, a different orientation of the direction of this change and thus a different orientation of the displacement direction 48 of the at least one displaceable deflection roller in space is also possible. In particular, the direction of displacement 48 can also be oriented at least substantially horizontally, as is exemplified below with reference to FIG Fig. 5 is described.

Furthermore, it has been described that the compensation traction means loop 40 can be arranged in the elevator shaft 2 and / or another room, in particular a further elevator shaft 54. Especially in the case of an arrangement in the elevator shaft 2 and / or a further elevator shaft 54, a displacement in a vertical displacement direction 48 is particularly advantageous if the normal case of a vertically extending elevator shaft is considered.

Fig. 5 shows a further embodiment of the in Fig. 2 with the reference numeral 35 denoted deflection device 35 with compensation traction means loop 40 in a horizontal arrangement. The deflection device 35 is preferably installed in a room 80 not assigned to an elevator shaft 2 of the building. The room 80 can be, for example, a parking garage that is used to park motor vehicles. In the embodiment according to Fig. 2 Required pulleys 56, 57 are omitted if the in the Fig. 5 illustrated arrangement is realized. The section 39 of the compensating traction means 36 - that is to say the compensating traction means loop 40 - can extend at least approximately horizontally through the space 56, being deflected at the displaceable deflection roller 43. The displaceable at least one deflection roller 43 mounted on the displaceable roller arrangement 49 can be displaced by means of the displacing device 46 shown schematically. The displacement device 46 can be arranged on the floor 10. By means of the transmission element 47, which can be a cable that can withstand tensile loads, the displacement device 46 enables the displaceable roller arrangement 49 to be displaced in the direction of displacement 48. By means of the displacement device 46, a certain tension force can also be brought about in the compensation traction means 36, which in the Operation is maintained. When lifting the Drive platform 16, this clamping force can then be reduced accordingly. In a modified embodiment, however, the displaceable deflection roller 43 can also be released and displaced in the displacement direction 48 before the lifting process. The displaceable deflection roller 43 can here also be suitably supported with respect to the floor 10, for example by means of a trolley 81.

The invention is not restricted to the embodiments and modifications described.

Claims (14)

1. A method for constructing an elevator system (1) comprising an elevator drive machine (4), an elevator car (5), a counterweight (6) and at least one flexible suspension means (7) in a building, with at least one lifting operation being carried out in said method in order to adapt the usable lifting height (15) of the elevator system (1) to an increasing height of the building, with a drive platform (16) that carries the elevator drive machine (4), as well as the elevator car (5) and the counterweight (6) with the aid of the suspension means (7), being raised in said lifting operation, and with a difference between a suspension means weight (F_A) of the suspension means (7) on the side of the elevator car and a suspension means weight (F_G) of the suspension means on the counterweight side essentially being compensated in said method with the aid of at least one compensating traction means (36) that extends from the underside of the elevator car (5) to the underside of the counterweight (6) via a deflecting device (35),
   characterized in that
   the deflecting device (35) comprises two roller assemblies (45, 49), which respectively have at least one deflecting roller (41, 42, 43, 44; 41, 42, 43, 44, 70, 71, 72, 73), with the at least one compensating traction means (36) extending over at least one respective deflecting roller of the two roller assemblies (45, 49) in such a way that it forms at least one compensating traction means loop (40), in which a defined amount of the compensating traction means (36) is stored,
   and in that a distance between the two roller assemblies (45, 49) is reduced prior to and/or during the lifting operation in order to release an amount of the compensating traction means (36) required for carrying out the lifting operation from the at least one compensating traction means loop (40).
2. The method according to claim 1, characterized in that
   the deflecting device (35) is provided with a stationary roller assembly (45) comprising at least one stationary deflecting roller (41, 42; 41, 42, 66, 67) and with a displaceable roller assembly (49) comprising at least one displaceable deflecting roller (43, 44; 43, 44, 70, 71).
3. The method according to one of claims 1 or 2, characterized in that
   the amount of the compensating traction means (36) stored in the at least one compensating traction means loop (40) is formed by a section of the at least one compensating traction means (36), which extends from the underside of the elevator car (5) to the underside of the counterweight (6) via the deflecting device (35).
4. The method according to one of claims 1 to 3, characterized in that
   a first fastening point (50) of the compensating traction means (36) on the elevator car (5) and a second fastening point (51) of the compensating traction means (36) on the counterweight (6) are at least indirectly fixed, or in that
   the compensating traction means (36) extends over respective deflecting rollers (60, 61), which are connected to the elevator car (5) and to the counterweight (6).
5. The method according to one of claims 1 to 4, characterized in that
   the at least one compensating traction means (36) is fixed on the elevator car (5) and on the counterweight (6) by means of fixing devices (50.1, 51.1) or on the elevator system (1) by means of stationary fixing devices (58.1, 59.1), with the compensating traction means remaining fixed by means of the fixing devices (50.1, 51.1; 58.1, 59.1) prior to, during and after a lifting operation.
6. The method according to one of claims 1 to 5, characterized in that
   the compensating traction means (36) extends along the compensating traction means loop (40) in a single circuit.
7. The method according to one of claims 1 to 5, characterized in that
   the compensating traction means (36) extends along the compensating traction means loop (40) in more than one circuit or in that the compensating traction means (36) extends along the compensating traction means loop (40) with a multiple reeving, respectively.
8. The method according to one of claims 1 to 7, characterized in that
   at least one of the roller assemblies (45, 49), which serve for forming the compensating traction means loop (40), is displaced with the aid of an electrically driven displacing device (46) in order to decrease or increase the distance between the two roller assemblies (45, 49).
9. The method according to one of claims 1 to 8, characterized in that
   both roller assemblies (45, 49), which serve for forming the compensating traction means loop (40), are displaced in opposite directions by means of at least one displacing device (46).
10. The method according to one of claims 8 or 9, characterized in that
    at least one of the roller assemblies (45, 49), which serve for forming the compensating traction means loop (40), is displaced by means of the displacing device (46) approximately synchronous with the process of raising the drive platform (16) during the lifting operation.
11. The method according to one of claims 1 to 10, characterized in that
    the compensating traction means loop (40) is at least largely arranged in the elevator shaft (2) of the building (3), which is associated with the elevator system (1), with at least one of the roller assemblies (45, 49) of the deflecting device (35) essentially being displaced in a vertical displacement direction (48).
12. The method according to one of claims 1 to 10, characterized in that
    the compensating traction means loop (40) is at least partially arranged in another elevator shaft (56) of the building.
13. The method according to one of claims 1 to 10, characterized in that
    the compensating traction means loop (40) is at least partially arranged in a room (56) of the building, which is not associated with an elevator shaft, and/or in that at least one of the roller assemblies (45, 49) of the deflecting device (35) essentially is displaced in a horizontal displacement direction (48).
14. The method according to one of claims 1 to 13, characterized in that
    elements (41 - 49, 63 - 69), which serve for forming the compensating traction means loop (40), are removed after the last lifting operation, and in that the deflecting device (35) of the elevator system (1) is converted into a deflecting device without compensating traction means loop after the last lifting operation.

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