DE102022118518A1 - Method for operating an elevator system - Google Patents

Abstract

The present invention relates to a method for operating an elevator system (1) with a first elevator shaft (2.1) and a second elevator shaft (2.2), with two lower exchange levels (6.1, 6.2) and two upper exchange levels (2.1, 2.2) between the elevator shafts (2.1, 2.2). 7.1, 7.2) are provided, wherein the first upper exchange level (7.1) is arranged further away from the lower exchange levels (6.1, 6.2) than the second upper exchange level (7.2), and wherein elevator cars (3) are set up to move independently , wherein in a time interval (Δt) a first car (3.1) moves from a lower exchange level (6.1, 6.2) in the first elevator shaft (2.1) to the first upper exchange level (7.1) and then to a lower exchange level (6.1, 6.2) in the first elevator shaft (2.1) is moved, and wherein in the time interval (Δt) at least a second car (3.2) and a third car (3.3) are moved from a lower exchange level (6.1, 6.2) to the second upper exchange level (7.2). .

Description

Technical area

The present invention relates to a method for operating an elevator system.

The present invention further relates to an elevator system set up to carry out such a method.

Background of the invention

Elevator systems are known from the prior art in which the elevator cars can be moved independently, in particular without a support cable, for example by means of linear drives, and which have two parallel elevator shafts each for opposite directions of travel. The elevator cars then move along the first elevator shaft in a first direction and along the second elevator shaft in the opposite direction and can change between the elevator shafts via exchange levels.

Such elevator systems are used, for example, in very large buildings as shuttle elevators, which are used to transport elevator cars from an entrance and exit area of the building to a specific destination level. At the target level, for example, access to another elevator system is provided, by means of which a large number of levels can be accessed individually. The shuttle elevator therefore serves as a feeder to a sub-distribution in a part of the building and has no other stopping points apart from the entrance and exit area and the destination level or a small number of destination levels.

It is known for such shuttle elevators to simultaneously provide exchange levels in the entrance and exit area of the building as well as on the destination level or levels, whereby, for example, passengers can leave the car in an exchange level in the first elevator shaft and after changing the car into the second New passengers can board the elevator shaft. For this purpose, landing doors are then provided in at least one or both elevator shafts in the exchange levels.

Furthermore, it is known from the prior art to move elevator cars in pairs immediately adjacent to one another, in particular directly one above the other, in order to increase the throughput capacity, in which case stopping points or exchange levels are then also provided immediately adjacent. For example, from an entrance and exit area of a building, two such exchange levels, which are arranged directly one above the other, are accessible via short stairs or ramps. However, the capacity advantage of such an arrangement is disadvantageously lost if several target levels located at a distance from one another are provided in the elevator system.

Description of the invention

Based on this situation, it is an object of the present invention to increase the throughput capacity in elevator systems with at least two lower exchange levels and at least two upper exchange levels spaced apart from one another.

The object of the invention is achieved by the features of the independent main claims. Advantageous refinements are specified in the subclaims. If technically possible, the teachings of the subclaims can be combined as desired with the teachings of the main and subclaims.

Advantageous aspects of the claimed invention are explained below and preferred modified embodiments of the invention are described further below. Explanations, especially regarding advantages and definitions of features, are essentially descriptive and preferred, but not limiting, examples. If an explanation is limiting, this will be expressly mentioned.

As far as elements are designated using numbering, for example “first component”, “second component” and “third component”, this numbering is intended purely for differentiation in the designation and does not represent any dependence of the elements on one another or a mandatory order of the elements This means in particular that a device does not have to have a “first component” in order to be able to have a “second component”. The device can also include a “first component” and a “third component”, but without necessarily having a “second component”. Several units of an element of a single numbering can also be provided, for example several “first components”.

According to a first aspect of the invention, the object is achieved by a method for operating an elevator system with a first elevator shaft for transporting elevator cars in a first direction and a second elevator shaft arranged parallel to the first elevator shaft for transporting elevator cars in a second direction, between which first elevator shaft and the second elevator shaft at least two lower exchange levels and at least at least two upper exchange levels are provided for transporting elevator cars between the first elevator shaft and the second elevator shaft, the first upper exchange level being arranged further away from the lower exchange levels than the second upper exchange level, and wherein elevator cars are designed to move independently along the elevator shafts and to move the exchange levels, wherein in a time interval a first car is moved from a lower exchange level in the first elevator shaft along the first elevator shaft to the first upper exchange level and then along the second elevator shaft to a lower exchange level in the first elevator shaft, and in which Time interval at least a second car and a third car are moved from a lower exchange level along the first elevator shaft to the second upper exchange level.

An elevator shaft of the elevator system can extend in a vertical direction and/or in a horizontal direction. In particular, the elevator shaft extends at least in sections in the horizontal direction. In one embodiment, the elevator system has at least a partial section of the elevator shaft in which it extends vertically and at least a partial section in which the elevator shaft extends horizontally, wherein the elevator car can move from the vertically extending section into the horizontally extending section.

Lower exchange levels are arranged closer to a first end of the elevator shafts than to a second end. Upper exchange levels, on the other hand, are arranged closer to the second end. In particular, in the case of vertical elevator shafts, the first end is the lower end and the second end is the upper end. However, the terms “lower” and “upper” are also understood here as assignment to the respective ends with regard to purely horizontal or partially horizontal elevator shafts. The lower exchange levels in purely horizontal elevator shafts can therefore be understood as front exchange levels, while upper exchange levels can be understood as rear exchange levels. Particularly preferably, the lower exchange levels are provided in an entrance and exit area of a building, while the upper exchange levels are provided in areas of the building in which access to further elevator systems are also arranged.

An exchange level is preferably formed as an opening between the first elevator shaft and the second elevator shaft. The exchange level includes, for example, two rotatable areas by means of which a car can be transferred between an elevator shaft and an exchange level. An exchange between the first elevator shaft and the second elevator shaft then takes place in that a car moves from the first elevator shaft to the correspondingly aligned rotatable area, is aligned there by rotating the rotatable area to the exchange plane, and moves along the exchange plane to the further rotatable area and there in turn is aligned with the second elevator shaft. Landing doors of the elevator system are preferably provided in the exchange levels, which form an access and/or starting point for the elevator cars. Such landing doors are particularly preferably provided exclusively in the exchange levels.

The first aspect of the invention now includes the teaching that in an elevator system, cars are moved between two lower exchange levels, which also represent access levels, and two upper exchange levels, which also represent access levels. In order to achieve an increased throughput capacity in comparison to a fixed pairing of cars when the lower exchange levels are at a different distance from one another than the upper exchange levels, it is proposed in a time interval in which a car moves from one of the lower exchange levels to the first upper exchange level and back, several cars move from one of the lower exchange levels to the second upper exchange level. This avoids the fact that the significantly longer running time that a car requires to reach the first upper exchange level also determines the interval in which the second upper exchange level can be approached. For this purpose, the fixed pairings of two cars known from the prior art, which stop simultaneously in the first lower and second lower exchange levels, are dissolved. In this respect, the elevator cars can take advantage of the increased capacity of two lower exchange levels, for example in an entrance and exit area of a building, and thereby reach several destination levels with increased throughput capacity. The second upper exchange level is served with a greater throughput capacity than the first upper exchange level. Depending on the distance between the different exchange levels, more than two cars can approach the second upper exchange level, while a first car rotates between the lower exchange level and the first upper exchange level.

In a preferred embodiment, at least the second car and the third car are closed from a lower exchange level along the first elevator shaft in the time interval the second upper exchange level and then moved along the second elevator shaft to a lower exchange level. The throughput capacity to the second upper exchange level is then at least twice as large as the throughput capacity to the first upper exchange level.

In one embodiment, in the time interval, the first car is moved from the first lower exchange level in the first elevator shaft along the first elevator shaft to the first upper exchange level and then along the second elevator shaft to the first lower exchange level in the first elevator shaft, wherein in the time interval at least the second car and the third car are moved from the second lower exchange level along the first elevator shaft to the second upper exchange level and in particular then along the second elevator shaft to the second lower exchange level. There is therefore a fixed assignment of the first lower exchange level to the first upper exchange level and the second lower exchange level to the second upper exchange level. In this way, a particularly high throughput capacity can be achieved. Furthermore, the fixed assignment ensures that a car only ever moves to one of the first upper exchange level and the second upper exchange level in one cycle and then returns to the lower exchange level assigned to it. A journey between the respective upper exchange level and the respective lower exchange level is not interrupted by an intermediate stop and is therefore particularly quick. The fixed assignment also makes orientation easier for passengers who, for a specific upper exchange level, only have a lower exchange level to choose from as a destination level and not several exchange levels.

Furthermore, the lower exchange levels are preferably provided for transporting elevator cars from the second elevator shaft into the first elevator shaft and the upper exchange levels are provided for transporting elevator cars from the first elevator shaft into the second elevator shaft. In this respect, there is always a direct circulation between a lower and an upper exchange level and no circulation between the two lower exchange levels and / or the two upper exchange levels. In this way, the elevator system can be operated particularly efficiently and with a high throughput capacity.

Furthermore, the lower exchange levels are preferably arranged at a first end of the first elevator shaft and the second elevator shaft, with the first upper exchange level being arranged at a second end of the first elevator shaft and the second elevator shaft. In particular, the ends are in a vertical direction. The elevator shafts then extend between the lower exchange levels and the first upper exchange level and not beyond. The elevator shafts are therefore fully utilized by the lower and upper exchange levels. Particularly preferably, the second lower exchange level is arranged closer to the first end than the first lower exchange level.

Particularly preferably, the first lower exchange level and the second lower exchange level are arranged directly adjacent to one another. Access to the two lower levels can then take place from the same area, in particular the same floor, of a building. Cars that land on the exchange levels at a landing door arranged there in the same elevator shaft are arranged directly one behind the other and therefore form a pair of cars. In a car pair, two cars are spaced a set distance apart and move synchronously. By forming pairs of elevator cars, an elevator shaft can be used particularly efficiently, since a minimum time is achieved that the elevator shaft is occupied by the two elevator cars during a passage. Depending on the conditions of the elevator system, it is also possible to form car groups with more than two cars.

Particularly preferably, elevator cars are moved in pairs at least in sections in the first elevator shaft and/or the second elevator shaft. For example, the first car forms a pair with the second car in the first elevator shaft and a pair with the third car in the second elevator shaft. Alternatively, the first car forms a pair with the second car in the first elevator shaft and moves in the second elevator shaft without forming a pair. In the sense of the first aspect of the invention, pair formation takes place depending on the situation, depending on how the rotation of the first car is timed to a rotation of the second or third car or another car. Insofar as the first car starts a rotation together with the second car from the lower exchange levels, such a pair of cars separates at the second upper exchange level, at which the second car enters the exchange level. Depending on the distance that the first car then travels to the first upper exchange level and after a change there to the second elevator shaft and the time required for this, the third car may have already arrived at the second upper exchange level and Change there to the second elevator shaft. There, the third car can, for example, form a pair of cars with the first car or can move back to the lower exchange levels independently of the first car. The car pair formation is therefore dynamic and depends in particular on whether, when a car leaves an exchange level, another car is located in the same elevator shaft just before or just behind the relevant exchange level. If there is another car just before or just behind the exchange level in the same elevator shaft, the two cars can also be intended to wait for each other within a certain time range in order to form a pair of cars.

Furthermore, the elevator system is preferably set up as a shuttle system for exclusively transporting elevator cars between the lower exchange levels and the upper exchange levels. With such a shuttle system, the advantages of the invention are achieved to a particular extent.

In another preferred embodiment, elevator cars are set up using a linear motor drive to move independently along the elevator shafts and the exchange levels. A linear motor for an elevator system is preferably formed from a primary part extending along the elevator shaft and a secondary part located on the elevator car. The primary part is formed from coils arranged one behind the other in a line, each of which is assigned a converter, with the coil being energized to generate a magnetic field when the car is in the area of the respective coil. The magnetic field is generated in such a way that the car is attracted or repelled by the magnetic field according to its intended travel path. The secondary part is formed by a permanent or electromagnet that interacts with the magnetic fields of the coil. A linear motor advantageously allows each car to be individually controlled in a simple manner. An exchange level preferably has a partial section of a primary part of a linear motor.

According to a second aspect of the invention, the object is achieved by an elevator system with a first elevator shaft for transporting elevator cars in a first direction and a second elevator shaft arranged parallel to the first elevator shaft for transporting elevator cars in a second direction, with between the first elevator shaft and the second elevator shaft, at least two lower exchange levels and at least two upper exchange levels are provided for transporting elevator cars between the first elevator shaft and the second elevator shaft, the first upper exchange level being arranged further away from the lower exchange levels than the second upper exchange level, with elevator cars using a linear motor drive are set up to move independently along the elevator shafts and the exchange levels and wherein the elevator system is set up to carry out a method according to the first aspect of the invention. The elevator system has the advantages described above with regard to the method according to the first aspect of the invention. In particular, a particularly high throughput capacity is achieved with the elevator system.

Preferably and with the advantages described above with regard to the method according to the first aspect of the invention, the first lower exchange level and the second lower exchange level are arranged immediately adjacent to one another.

Further preferred and with the advantages described above with regard to the method according to the first aspect of the invention, the lower exchange levels are arranged at a first end of the first elevator shaft and the second elevator shaft, the first upper exchange level being arranged at a second end of the first elevator shaft and the second elevator shaft is.

Further preferred and with the advantages described above with regard to the method according to the first aspect of the invention, the elevator system is set up as a shuttle system for exclusively transporting elevator cars between the lower exchange levels and the upper exchange levels.

Brief description of the drawings

The invention is explained in more detail below with reference to the accompanying drawings using preferred exemplary embodiments. The wording figure is abbreviated to Fig. in the drawings.

• 1 eine schematische Darstellung einer Aufzugsanlage gemäß einem bevorzugten Ausführungsbeispiel;
• 2 eine schematische Diagrammdarstellung der Position zweier Fahrkörbe während einem Umlauf in der Aufzugsanlage nach 1 nach dem Stand der Technik;
• 3 eine schematische Diagrammdarstellung der Position mehrerer Fahrkörbe während einem Umlauf in der Aufzugsanlage nach 1 nach einem Aspekt der Erfindung;
• 4 eine schematische Diagrammdarstellung der Position mehrerer Fahrkörbe während einem Umlauf in der Aufzugsanlage nach 1 nach einem weiteren Aspekt der Erfindung;
• 5 eine schematische Diagrammdarstellung der Position mehrerer Fahrkörbe während einem Umlauf in der Aufzugsanlage nach 1 nach noch einem weiteren Aspekt der Erfindung.

Show in the drawings

• 1 a schematic representation of an elevator system according to a preferred exemplary embodiment;
• 2 a schematic diagram representation of the position of two elevator cars during a revolution in the elevator system 1 According to the state of the art;
• 3 a schematic diagram representation of the position of several elevator cars during a revolution in the elevator system 1 according to an aspect of the invention;
• 4 a schematic diagram representation of the position of several elevator cars during a revolution in the elevator system 1 according to a further aspect of the invention;
• 5 a schematic diagram representation of the position of several elevator cars during a revolution in the elevator system 1 according to yet another aspect of the invention.

Detailed description of the drawings

The exemplary embodiments described are merely examples that can be modified and/or supplemented in a variety of ways within the scope of the claims. Each feature described for a particular embodiment may be used alone or in combination with other features in any other embodiment. Each feature that is described for an embodiment of a particular claim category can also be used in a corresponding manner in an embodiment of another claim category.

1 shows an elevator system 1 with a first elevator shaft 2.1 for transporting cars 3 in a first direction 4.1 and a second elevator shaft 2.2 for transporting cars 3 in a second direction 4.1 opposite to the first direction 4.1. A first lower exchange level 6.1 and a second lower exchange level 6.2 are arranged at a first end 5.1. A first upper exchange level 7.1 is arranged at a second end 5.2, with a second upper exchange level 7.2 being arranged at a distance from the first upper exchange level 7.1 between the first upper exchange level 7.1 and the lower exchange levels 6.1, 6.2. The first upper exchange level 7.1 is therefore arranged further away from the lower exchange levels 6.1, 6.2 than the second upper exchange level 7.2. The exchange levels 6.1, 6.2, 7.1, 7.2 serve to ensure that elevator cars 3 move transversely to the first direction 4.1 and to the second direction 4.2 from one elevator shaft 2.1, 2.2 to the other elevator shaft 2.1, 2.2. The exchange levels 6.1, 6.2, 7.1, 7.2 are each also provided as landing levels, in which landing doors are provided in both the first elevator shaft 2.1 and the second elevator shaft 2.2. In addition to the exchange levels 6.1, 6.2, 7.1, 7.2, no other landing levels are provided in the elevator shafts 2.1, 2.2.

2 shows a progression of the position in meters of a first car 3.1 and a second car 3.2 in the elevator shafts 2.1, 2.2 over time in seconds, with the position of the cars 3.1, 3.2 over an entire cycle, i.e. between leaving the lower exchange levels 6.1 , 6.2 in the first elevator shaft 2.1 and the return to the lower exchange levels 6.1, 6.2 in the first elevator shaft 2.1. The cars 3.1, 3.2 form a pair of cars and initially move from their starting positions 8.1, 8.2 along the first elevator shaft 2.1 as a pair to the second upper exchange level 7.2. There the car pair separates, with the first car 3.1 moving further along the first elevator shaft 2.1 to the first upper exchange level 7.1 and the second car 3.2 entering the second upper exchange level 7.2. The second car 3.2 then remains in the second upper exchange level 7.2 until the first car 3.1 has moved through the first upper exchange level 7.1 and along the second elevator shaft 2.2 until just before the second upper exchange level 7.2 and then forms between second upper exchange level 7.2 and the lower exchange levels 6.1, 6.2 in turn a pair of cars. The circulation ends when the elevator cars 3.1 3.2 have arrived in their respective target position 9.1, 9.2, which corresponds to the respective starting position 8.1, 8.2, i.e. after moving back into the first elevator shaft 2.1. The rotation time of the second car 3.2 is determined by the fixed pair formation by the travel time that the first car 3.1 requires for one revolution, with the second car 3.2 waiting for the first car 3.1 in the second upper exchange level 7.2. In this way, the elevator system 1 is only insufficiently utilized.

3 shows, for a method according to the first aspect of the invention, a progression of the position in meters of a first car 3.1, a second car 3.2 and a third car 3.3 in the elevator shafts 2.1, 2.2 over time in seconds, the position of the cars 3.1, 3.2, 3.3 over an entire cycle, i.e. between leaving the lower exchange levels 6.1, 6.2 in the first elevator shaft 2.1 and the return to the lower exchange levels 6.1, 6.2 in the first elevator shaft 2.1. The first car 3.1 and the second car 3.2 initially form a pair of cars and move together from their starting positions 8.1, 8.2 in the lower exchange levels 6.1, 6.2 in the first elevator shaft 2.1 up to the second upper exchange level 7.2. From there, the second car 3.2 moves along the second upper exchange level 7.2 and the second elevator shaft 2.2 to its target position 9.2, which corresponds to the starting position 8.2. The first car 3.1 moves to the first upper exchange level 7.1 and changes there to the second elevator shaft 2.2. In the subsequent ver When the first car 3.1 travels along the second elevator shaft 2.2 to its target position 9.1, it again forms a pair of cars from the second upper exchange level 7.2, but this time with the third car 3.3, which has now moved from its starting position 8.3 to the second upper exchange level 7.2 and there has changed to the second elevator shaft 2.2. So while the first car 3.1 is moved in a time interval Δt from its starting position 8.1 in the first lower exchange level 6.1 in the first elevator shaft 2.1 to its target position 9.1, which corresponds to the starting position 8.1, both the second car 3.2 and the third Car 3.3 moves from the second lower exchange level 6.2 to the second upper exchange level 7.2 and back to the second lower exchange level 6.2, i.e. from its starting positions 8.2, 8.3 to its target positions 9.2, 9.3. The throughput capacity for the second upper exchange level 7.2 is therefore twice as high as the throughput capacity for the first upper exchange level 7.1, so that overall the throughput capacity of the elevator system 1 is increased. The cars 3.1, 3.2, 3.3 dynamically form car pairs with one another.

In 3 The position progression of further cars 3.4, 3.5, 3.6 is also shown, which are staggered relative to one another in the same way as the courses of the lift cars 3.1, 3.2, 3.3.

4 shows a progression of the position in meters of a first car 3.1, a second car 3.2, a third car 3.3 and a fourth car 3.4 in the elevator shafts 2.1, 2.2 over time in seconds, also for a method according to the first aspect of the invention. In the time interval Δt, both the second car 3.2, the third car 3.3 and the fourth car 3.4 are moved from the second lower exchange level 6.2 into the second upper exchange level 7.2 and also the second car 3.2 and the third car 3.3 and back into the second lower exchange level 6.2 move. The first car 3.1 moves along the second elevator shaft 2.2 without forming a pair. Overall, a throughput capacity that is three times as large is achieved for the second upper exchange level 7.2 as for the first upper exchange level 7.1, so that the overall throughput capacity of the elevator system 1 is increased.

In 4 The position progression of further cars 3.5, 3.6 is also shown, which are staggered relative to one another in the same way as the courses of the lift cars 3.1, 3.2.

5 shows a further embodiment of the method, which largely corresponds to the embodiment 3 corresponds, although no course of a sixth car is shown. In contrast to the embodiment according to 3 the course of a seventh car 3.7 from a starting position 8.7 to a target position 9.7 is shown, with the starting position 8.7 and target position 9.7 corresponding. The seventh car 3.7 initially forms a pair of cars in the first elevator shaft 2.1 with the third car 3.3 until they reach the second upper exchange level 7.2. The seventh car 3.7 moves from there to the first upper exchange level 7.1 and later forms a pair of cars with the fifth car 3.5 in the second elevator shaft 2.2 from the second upper exchange level 7.2. In this embodiment, all cars 3.1, 3.2, 3.3, 3.4, 3.5, 3.7 between the first lower exchange level 6.1 and the second upper exchange level 7.2 form car pairs, but each with different ones

partners. There is therefore a dynamic formation of car pairs, with which the advantages of the invention are achieved in particular.

Reference symbol list

1

Elevator system

2.1

first elevator shaft

2.2

second elevator shaft

3.1

first car

3.2

second car

3.3

third car

3.4

fourth car

3.5

fifth car

3.6

sixth car

4.1

first direction

4.2

second direction

5.1

first ending

5.2

second ending

6.1

first lower exchange level

6.2

second lower exchange level

7.1

first upper exchange level

7.2

second upper exchange level

8.1

Starting position of the first car

8.2

Starting position of the second car

8.3

Starting position of the third car

8.4

Starting position of the fourth car

9.1

Target position of the first car

9.2

Target position of the second car

9.3

Target position of the third car

9.4

Target position of the fourth car

Δt

time interval

Claims (15)

Method for operating an elevator system (1). a first elevator shaft (2.1) for transporting elevator cars (3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6) in a first direction (4.1) and a second elevator shaft (2.2) arranged parallel to the first elevator shaft (2.1) for transporting Cars (3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6) in a second direction (4.2); wherein between the first elevator shaft (2.1) and the second elevator shaft (2.2) there are at least two lower exchange levels (6.1, 6.2) and at least two upper exchange levels (7.1, 7.2) for transporting elevator cars (3, 3.1, 3.2, 3.3, 3.4, 3.5 , 3.6) are provided between the first elevator shaft (2.1) and the second elevator shaft (2.2); wherein the first upper exchange level (7.1) is arranged further away from the lower exchange levels (6.1, 6.2) than the second upper exchange level (7.2); and wherein elevator cars (3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6) are designed to move independently along the elevator shafts (2.1, 2.2) and the exchange levels (6.1, 6.2, 7.1, 7.2); wherein in a time interval (Δt) a first elevator car (3.1) moves from a lower exchange level (6.1, 6.2) in the first elevator shaft (2.1) along the first elevator shaft (2.1) to the first upper exchange level (7.1) and then along the second elevator shaft (2.2) is moved to a lower exchange level (6.1, 6.2) in the first elevator shaft (2.1); and wherein in the time interval (Δt) at least a second car (3.2) and a third car (3.3) are moved from a lower exchange level (6.1, 6.2) along the first elevator shaft (2.1) to the second upper exchange level (7.2). Procedure according to Claim 1 , wherein in the time interval (Δt) at least the second car (3.2) and the third car (3.3) move from a lower exchange level (6.1, 6.2) along the first elevator shaft (2.1) to the second upper exchange level (7.2) and then along the second elevator shaft (2.2) can be moved to a lower exchange level (6.1, 6.2). Procedure according to Claim 1 or 2 , wherein in the time interval (Δt) the first car (3.1) moves from the first lower exchange level (6.1) in the first elevator shaft (2.1) along the first elevator shaft (2.1) to the first upper exchange level (7.1) and then along the second elevator shaft (2.2) is moved to the first lower exchange level (6.1) in the first elevator shaft (2.1); and wherein in the time interval (Δt) at least the second car (3.2) and the third car (3.3) move from the second lower exchange level (6.2) along the first elevator shaft (2.1) to the second upper exchange level (7.2) and in particular subsequently along the second elevator shaft (2.2) to the second lower exchange level (6.2). Method according to one of the preceding claims, wherein the lower exchange levels (6.1, 6.2) for transporting elevator cars (3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6) from the second elevator shaft (2.2) into the first elevator shaft (2.1) and the upper exchange levels (7.1, 7.2) are provided for transporting elevator cars (3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6) from the first elevator shaft (2.1) into the second elevator shaft (2.2). Method according to one of the preceding claims, wherein the lower exchange levels (6.1, 6.2) are arranged at a first end (5.1) of the first elevator shaft (2.1) and the second elevator shaft (2.2); and wherein the first upper exchange level (7.1) is arranged at a second end (5.2) of the first elevator shaft (2.1) and the second elevator shaft (2.2). Method according to one of the preceding claims, wherein the first lower exchange level (6.1) and the second lower exchange level (6.2) are arranged immediately adjacent to one another. Method according to one of the preceding claims, wherein elevator cars (3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6) are moved at least in sections in pairs in the first elevator shaft (2.1) and / or the second elevator shaft (2.2). Procedure according to Claim 7 , wherein the first car (3.1) forms a pair in the first elevator shaft (2.1) with the second car (3.2) and forms a pair in the second elevator shaft with (2.2) the third car (3.3). Procedure according to Claim 7 , wherein the first car (3.1) forms a pair with the second car (3.2) in the first elevator shaft (2.1) and moves in the second elevator shaft (2.2) without forming a pair. Method according to one of the preceding claims, wherein the elevator system (1) acts as a shuttle system for exclusively transporting elevator cars (3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6) between the lower exchange levels (6.1, 6.2) and the upper exchange levels (7.1 , 7.2) is set up. Method according to one of the preceding claims, wherein elevator cars (3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6) are set up to move independently along the elevator shafts (2.1, 2.2) and the exchange levels (6.1, 6.2, 7.1, 7.2) by means of a linear motor drive ) to proceed. Elevator system (1). a first elevator shaft (2.1) for transporting elevator cars (3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6) in a first direction (4.1) and a second elevator shaft (2.2) arranged parallel to the first elevator shaft (2.1) for transporting Cars (3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6) in a second direction (4.2); wherein between the first elevator shaft (2.1) and the second elevator shaft (2.2) there are at least two lower exchange levels (6.1, 6.2) and at least two upper exchange levels (7.1, 7.2) for transporting elevator cars (3, 3.1, 3.2, 3.3, 3.4, 3.5 , 3.6) are provided between the first elevator shaft (2.1) and the second elevator shaft (2.2); wherein the first upper exchange level (7.1) is arranged further away from the lower exchange levels (6.1, 6.2) than the second upper exchange level (7.2); wherein elevator cars (3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6) are designed to move independently along the elevator shafts (2.1, 2.2) and the exchange levels (6.1, 6.2, 7.1, 7.2); and wherein the elevator system (1) is set up to carry out a method according to one of the preceding claims. Elevator system (1). Claim 12 , wherein the first lower exchange level (6.1) and the second lower exchange level (6.2) are arranged immediately adjacent to one another. elevator system Claim 12 or 13 , wherein the lower exchange levels (6.1, 6.2) are arranged at a first end (5.1) of the first elevator shaft (2.1) and the second elevator shaft (2.2); and wherein the first upper exchange level (7.1) is arranged at a second end (5.2) of the first elevator shaft (2.1) and the second elevator shaft (2.2). Elevator system (1) according to one of the Claims 12 until 14 , set up as a shuttle system for exclusively transporting elevator cars (3, 3.1, 3.2, 3.3, 3.4, 3.5, 3.6) between the lower exchange levels (6.1, 6.2) and the upper exchange levels (7.1, 7.2).

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