Elevator system with two carriages in one elevator shaft and a passing position

Abstract

The following descriptions relate to an elevator system (1.2) comprising an elevator shaft (2) with at least three landing positions (3.1, 3.2, 3.3, 3.4, 3.5, 3.6) defined by shaft doors (2.1, 2.2, 2.3, 2.4, 2.5, 2.6), at least two cars (4.1, 4.2) movable in the elevator shaft (2) for operating the landing positions (3.1, 3.2, 3.3, 3.4, 3.5, 3.6), and an elevator control system (6), wherein the elevator control system (6) is configured to move the cars (4.1, 4.2) to the landing positions (3.1, 3.2, 3.3, 3.4, 3.5, 3.6) in accordance with car calls and to move them into the to stop at landing positions (3.1, 3.2, 3.3, 3.4, 3.5, 3.6), characterized in that the elevator control (6) is further configured to allow at least one car (4.1, 4.2) to move from one of the landing positions (3.1, 3.2, 3.3, 3.4, 3.5, 3.6) to an avoidance position (10.1, 10.2, 10.3) defined between two landing positions (3.1, 3.2, 3.3, 3.4, 3.5, 3.6).3) to proceed in a landing door-free area of ​​the elevator shaft (2) and to stop in the alternate position (10.1, 10.2, 10.3).

Description

Technical area

[0001] The following statements relate to an elevator system, comprising an elevator shaft with at least three landing positions defined by shaft doors, at least two elevator cars movable in the elevator shaft on the same travel lane for serving the landing positions and an elevator control, wherein the elevator control is configured to move the elevator cars into the landing positions in accordance with elevator car calls and to stop them in the landing positions.

[0002] Furthermore, the following statements relate to a method for operating such an elevator system. Technical background

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

[0004] Elevator systems with multiple cars traveling in the same elevator shaft and on the same travel lane are marketed by the applicant under the name "TWIN." Such systems allow a single elevator shaft to be utilized more efficiently than a single-car system, thus reducing waiting times.

[0005] In such elevator systems, it is known to provide landing positions in pairs, for example, for vertical elevators in a building lobby, where, for example, a lower landing position of the pair of landing positions is located at ground level and an upper landing position of the pair of landing positions can be reached via a staircase and a platform or a gallery. If the lower elevator car is to approach the upper landing position of the pair of landing positions, for example, for a special trip, the upper elevator car must detour to the next landing position. Such an detour process, if the next landing position is far away, requires a relatively large amount of energy and time.

[0006] From EP 1 915 308 A2, alternative positions at the shaft end are known for elevator systems with several cars, which serve to allow both cars access to all landing positions during regular operation of the elevator system.

[0007] Based on this situation, the task at hand is to reduce the energy and time required to avoid one car in an elevator system with two cars. Description - Technical solution

[0008] The present object is achieved by the features of the independent claims. Advantageous embodiments are specified in the subclaims, the description, and the drawings. Where technically feasible, the teachings of the subclaims may be combined arbitrarily with the teachings of the main and subclaims.

[0009] In particular, the object is accordingly achieved by an elevator system comprising an elevator shaft with at least three landing positions defined by shaft doors, at least two elevator cars movable in the elevator shaft on the same travel lane for serving the landing positions, and an elevator control system, wherein the elevator control system is configured to move the elevator cars into the landing positions in accordance with car calls and to stop them in the landing positions, and wherein the elevator control system is further configured to move at least one elevator car for avoiding one of the landing positions into an avoidance position defined between two landing positions in a landing door-free area of ​​the elevator shaft and to stop it in the avoidance position.

[0010] Advantageous aspects are explained below, and preferred modified embodiments are described further below. Explanations, particularly regarding advantages and definitions of features, are essentially descriptive and preferred, but not limiting, examples. If an explanation is limiting, this will be expressly stated.

[0011] Where ordinal numbers, such as "first", "second", etc., are used, for example to designate a component, an element, a method step, or a method action, these ordinal numbers are intended purely for differentiation in the designation and do not indicate any dependencies or sequences. This means, in particular, that, for example, a device does not have to have a "first component" in order to have a "second component." A device can also have a "first component" and a "third component" without necessarily having a "second component." Multiple units of the same ordinal number can also be provided, for example, multiple "first components."

[0012] According to the present understanding, an elevator system is designed, for example, with at least one vertical and / or horizontal elevator shaft and two elevator cars that can be moved on the same travel track in the at least one elevator shaft, but can also have further elevator shafts with further elevator cars, in particular two elevator cars per additional elevator shaft.

[0013] An elevator car is held and driven, for example, by a suspension element, with a drive device transmitting a drive torque to the suspension element via a drive shaft. The suspension element is also preferably connected to a counterweight associated with the elevator car. A drive device is arranged, in particular, in a machine room or in a shaft head. A suspension element is designed, in particular, as a rope, belt, strap, chain, or the like and carries tensile loads in the direction of its longitudinal extension.

[0014] Alternatively, an elevator car is held and driven by a linear drive. A linear drive, for example, consists of a primary part extending along the elevator shaft and a secondary part located on the car. The primary part consists of coils arranged one behind the other in a line, each of which is assigned a converter. Current is supplied to the coil to generate a magnetic field when the car is in the area of ​​the respective coil, thus moving the car. The secondary part is formed by a permanent magnet or electromagnet that interacts with the magnetic fields of the coil.

[0015] An elevator shaft is a continuous shaft that extends over several floors and / or along several areas of a building and has a cross-section designed for the passage of the elevator car. An elevator shaft of an elevator system can extend vertically and / or horizontally.

[0016] If a landing position is defined by a shaft door, a shaft door is arranged in a wall of the elevator shaft at the landing position, against which the elevator car is aligned when approaching the landing position such that the shaft door and a car door of the elevator car form a passage between the landing level and the elevator car. The elevator control system is configured to approach the landing position and stop the elevator car there. For example, position data of the landing position according to an absolute position detection system are stored in a non-volatile memory of the elevator control system. These data can be selected by the elevator control system as the destination or starting position of a journey and processed algorithmically. In particular, the elevator control system can only approach those positions as destinations that are defined and stored as landing positions or the like.

[0017] An elevator controller comprises, in particular, a data processing device for receiving car calls and status information of the components of the elevator system, as well as for sending control commands to components of the elevator system based on algorithmic processing of the car calls and the status information. In particular, the elevator controller is signal-connected to the drive devices of the elevator cars for their control.

[0018] A car's avoidance is understood, for example, as a movement of the car from a landing position, in which it is currently located, to another position, in particular an avoidance position. Avoidance can also be implemented by a car waiting in another position, in particular an avoidance position, before approaching a landing position, thus delaying the approach. Avoidance is caused, in particular, by a car being assigned to another car that affects the landing position in question, whereby the avoiding car is not directly involved in servicing the car call.

[0019] The solution to the problem with the elevator system described above includes the teaching that an escape position is provided between several landing positions, i.e., defined for the elevator control system as an approachable position for stopping a car there. In this way, in an elevator system with a relatively large distance between two landing positions, it is possible to avoid one of the two elevator cars from one of the two landing positions without the car having to travel the entire distance between the two landing positions. The elevator car can therefore avoid the next landing position with significantly less energy and time expenditure than if it had avoided the landing position and, in particular, can quickly return to the landing position where it was provided once it had avoided the landing position.

[0020] The solution further includes the teaching that the alternative position is defined at a position in the elevator shaft which is located between two landing positions, independently of the landing positions, i.e. in an area of ​​the elevator shaft in which no landing door with a landing position is located there. For the elevator control system, a corresponding position in the elevator shaft is therefore defined as an alternative position, independent of landing positions, for example by storing corresponding position information in a non-volatile memory of the elevator control system. In particular, in the elevator system, the alternative position is not made available for selection when a car call is entered, but rather serves merely as a system-side selection during an alternative movement caused by a car call. The solution is furthermore limited to simple switches by storing data orThis can be implemented by appropriately training the elevator control system and / or by adapting the elevator control algorithms, without requiring any structural work or additional components on the elevator system. The solution is therefore particularly cost-effective.

[0021] The elevator system also has the advantage that the standby position can be used to prepare a car. If, for example, a landing position needs to be kept free for a special trip of the first car, a second car can be moved into the immediate vicinity of this landing position, namely into the standby position. Once the corresponding landing position is free again, the second car can be moved quickly into the landing position without having to travel the entire distance from the next landing position.

[0022] Alternatively or additionally, it can be provided that the landing positions form at least one landing position pair consisting of two immediately adjacent landing positions, with the landing position of each landing position pair being assigned to a different one of the two elevator cars. The teaching of the present disclosure then makes it possible for a first elevator car of the two elevator cars to approach the landing position assigned to the second elevator car of the pair of elevator cars, deviating from the assignment during regular operation, for which the second elevator car can evade the landing position with minimal energy and time expenditure.In particular, this can be used for a special trip of the first car, wherein the first car approaches the landing position of the landing position pair assigned to the second car for reasons related to the special trip, while an approach to this landing position by the second car is not intended in regular operation.

[0023] Alternatively or additionally, the diversion position can be arranged directly adjacent to a pair of landing positions. For the above-described diversion of the second car when the first car moves from the pair of landing positions into the landing position assigned to the second car, the second car can then divert with a particularly short distance and thus with particularly low energy and time expenditure.

[0024] Alternatively or additionally, it can be provided that at least one landing position pair has directly adjacent diversion positions arranged on both sides. This allows both cars to divert from the respective assigned landing positions in the loading position pair, allowing the other car access to the other landing position in the landing position pair.

[0025] Alternatively or additionally, the elevator shaft can be provided with an even number of landing positions defined by shaft doors, which exclusively form landing position pairs. Each landing position pair then has one landing position assigned to the first car and one landing position assigned to the second car. The provision of the aforementioned alternative position or alternative positions enables both elevator cars to serve both landing positions of the pair of landing positions with minimal energy and time expenditure.

[0026] Alternatively or additionally, it can be provided that at least one of the elevator cars has at least one additional function compared to the other car. Such an additional function could be, for example, that the elevator car is designed to transport people with disabilities, such as wheelchair users, or that the elevator car is designed as a freight elevator car with a particularly high load capacity or at least a higher load capacity than the other elevator car. Furthermore, the additional function could be, for example, that the elevator car is designed as a fire service elevator car or that the elevator car can reach a landing position that the other elevator car cannot reach.Advantageously, by providing the above-described alternative position or alternative positions, the additional function can be provided with little energy and time expenditure at more, in particular at all, landing positions of the elevator system, namely also at those which are not intended to be approached by the elevator car with the additional function during regular operation.

[0027] Alternatively or additionally, the elevator system can be designed as a shuttle elevator with landing positions exclusively in distribution landing positions of a building, with the distance between the distribution landing positions corresponding to a multiple of the car's extension in the direction of the travel lane (elevator car height in a vertical travel lane). The aforementioned advantage achieved by the bypass positions is then particularly effective, since moving the car to the next distribution landing position, and thus over a particularly long distance to avoid a landing position, is avoided by an bypass position arranged between the distribution landing positions.

[0028] The object is further achieved by a method for operating a previously described elevator system, comprising the steps of: receiving, at the elevator control, a car call for a first car from the two cars to a second landing position from the landing positions, algorithmically processing the car call by means of the elevator control, and avoiding the second car from the two cars from the second landing position to the avoidance position defined between two landing positions.

[0029] A car call is received in particular following an input at a user interface of the elevator system, such as a terminal at a landing position or at a personal device, and comprises at least a starting landing position for the desired journey. A car call can optionally also comprise a planned direction of travel or a destination landing position for the desired journey. Receiving takes place by data transmission via a signal connection between the user interface and the elevator control system. The algorithmic processing comprises in particular assigning the car call to one of the elevator cars, taking into account boundary conditions such as status information of the car and other cars in order to select a suitable car to serve the car call. The result of the algorithmic processing is control commands for the assigned car or cars.its drive device and in particular additional control commands to other cars or their drive devices to deviate from the travel path necessary for operating the car call.

[0030] The solution to the problem using the method described above essentially encompasses the same teaching as described above for the elevator system, but in a corresponding manner. By moving the second car to the evasive position defined between the landing positions, it is possible to avoid moving the second car to a distant landing position for the purpose of evasive action, thus significantly reducing the energy and time required for evasive action.

[0031] Alternatively or additionally, the car call can include a request for an additional function that the first car has compared to the second car. For example, a request for the additional function can be entered with the car call via a user interface. An additional function could be, for example, the ability to transport a person with disabilities, particularly a wheelchair user, the ability to transport a particularly heavy load, the design of the car as a fire service car, or the ability to reach a specific landing position.

[0032] Alternatively or additionally, it can be provided that the second landing position is assigned to the second car and forms a landing position pair with a first of the landing positions, with the first landing position being assigned to the first car. Contrary to the usual assignment, which is intended in particular for normal operation of the elevator system, it is then also possible for the first car to reach the second landing position, even though the first car is not assigned to the second landing position.

[0033] Alternatively or additionally, it can be provided that the car call is a destination car call and the first landing position is the destination load position. The avoidance then serves, in particular, to enable movement between the two landing positions of the landing position pair using the first car, so that the second car only has to avoid the area of ​​the landing position pair in order to avoid the first car for its operation of the car call.

[0034] Alternatively or additionally, the method may further comprise the step of moving the second car to the second landing position after the first car has left the second landing position to serve the car call. The second car can then be made available again in the second landing position after the need for the evasive action no longer exists. Short description of the drawings

[0035] A preferred technical solution is explained in more detail below with reference to the accompanying drawings using preferred embodiments. The term "figure" is abbreviated to "Fig." in the drawings.

[0036] The drawings show Fig. 1 a schematic representation of an elevator system according to the prior art; Fig. 2 is a schematic representation of an elevator system in an embodiment according to the present disclosure; Fig. 3 is a diagram of a method according to the present disclosure. Detailed description of the drawings

[0037] The described embodiments 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 specific embodiment can be used independently or in combination with other features in any other embodiment. Each feature described for an embodiment of a specific claim category can also be used correspondingly in an embodiment of a different claim category.

[0038] Fig. 1 shows an elevator system 1.1 according to the prior art with an elevator shaft 2, in particular with a particularly long vertical elevator shaft 2, such as in a high-rise building. Fig. Figure 2 shows an elevator installation 1.2 according to the present disclosure, which corresponds to the elevator installation 1.1 in basic features. In the following, only the elevator installation 1.2 according to Fig. 2, whereby the basic relationships of the lift system 1.1 are described in accordance with Fig. 1 result from this and where it is emphasized below when again referring to the Fig. 1 is addressed.

[0039] The elevator system 1.2 has six landing positions 3.1, 3.2, 3.3, 3.4, 3.5, 3.6 distributed along the elevator shaft 2, with shaft doors 2.1, 2.2, 2.3, 2.4, 2.5, 2.6 arranged there. A first elevator car 4.1 and a second elevator car 4.2 are arranged in the elevator shaft 2, with the elevator cars 4.1, 4.2 being movable along the same travel lane, thus preventing them from overtaking each other. The elevator cars 4.1, 4.2 are connected, for example, via support means (not shown in detail) to drive devices (not shown), and each car 4.1, 4.2 is connected to a counterweight (also not shown). The cars 4.1, 4.2 can alternatively be designed by means of linear drives (also not shown) arranged on the cars 4.1, 4.2.

[0040] The elevator system 1.2 further comprises an elevator control system 6, which is shown only very schematically here. The elevator control system 6 interacts with other components of the elevator system 1.2, in particular with user interfaces such as terminals at the landing positions 3.1, 3.2, 3.3, 3.4, 3.5, 3.6 for receiving car calls, or with the drive devices of the cars 4.1, 4.2. For this purpose, the elevator control system 6 has signal connections to these components. The elevator control system 6 further comprises a non-volatile memory 6.1, which stores data relating to the landing positions 3.1, 3.2, 3.3, 3.4, 3.5, 3.6. According to or with these data, which for example comprise a position coordinate of an absolute position detection system of the elevator installation 1.2 for each landing position 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, the elevator control 6 is configured to move the elevator cars 4.1, 4.2 to these landing positions 3.1, 3.2, 3.3, 3.4, 3.5, 3.6 and stop there.

[0041] The elevator system 1.2 is configured as a shuttle elevator, with landing positions 3.1, 3.2, 3.3, 3.4, 3.5, and 3.6 on distribution floors being designed as distribution landing positions. For each distribution floor, two landing positions 3.1, 3.2, 3.3, 3.4, 3.5, and 3.6 are combined to form landing position pairs 8.1, 8.2, and 8.3. For each landing position pair 8.1, 8.2, and 8.3, a lower loading position 3.1, 3.3, and 3.5 is assigned to the (lower) first elevator car 4.1 and an upper landing position 3.2, 3.4, and 3.6 is assigned to the (upper) second elevator car 4.2. For example, during normal operation of elevator system 1.2, landing positions 3.1, 3.2, 3.3, 3.4, 3.5, and 3.6 are only served by the respective assigned car 4.1, 4.2. For example, from the respective landing positions 3.1, 3.2, 3.3, 3.4, 3.5, and 3.6 of a landing position pair 8.1, 8.2, and 8.3, other elevator systems (not shown) can be reached to reach neighboring landing positions.The landing position pairs 8.1, 8.2, 8.3 are accordingly arranged at a large distance from each other along the elevator shaft 2.

[0042] If, in the elevator system 1.1 according to the state of the art, it becomes necessary for the first car 4.1 to be moved to a landing position 3.2, 3.4, 3.6 assigned to the second car 4.2, for example because an additional function available only in the first car 4.1 is required for a special trip at this landing position 3.2, 3.4, 3.6, the second car 4.2, if it is at this landing position 3.2, 3.4, 3.6 or is just approaching it, must give way to the first car 4.1. Fig. 1, this is illustrated by way of example for the first landing position 3.1 and the second landing position 3.2. If the first elevator car 4.1 must approach the second landing position 3.2 along a path 9.1 indicated by an arrow, the second elevator car 4.2 located there must be moved along the path 9.2 indicated by another arrow to the very distant third landing position 3.3, because the elevator control system 6 can only generate one control command toward a defined target position for the second elevator car 4.2. The journey of the second elevator car 4.2 to the third landing position 3.3 is both energy- and time-consuming. In particular, re-positioning the second elevator car 4.2 in the second landing position 3.2 after the first elevator car 4.1 has left it takes a relatively long time, which negatively impacts the transport capacity of the elevator system 1.1. The first car 4.1 can then be moved to the second landing position 3.2 after the second car 4.2 has moved to the third landing position 3.3.

[0043] In the elevator installation 1.2 according to the present disclosure, escape positions 10.1, 10.2, 10.3, 10.4 are now defined directly adjacent to the landing position pairs 8.1, 8.2, 8.3. The escape positions 10.1 and 10.3 are arranged above a respective landing position pair 8.1, 8.2 to allow the (upper) second car 4.2 to escape from the respective upper landing position 3.2, 3.4 of the landing position pair 8.1, 8.2. The escape positions 10.2 and 10.4 are arranged below a respective landing position pair 8.2, 8.3 to allow the (lower) first car 4.1 to escape from the respective lower landing position 3.3, 3.5 of the landing position pair 8.2, 8.3. The alternative positions 10.1, 10.2, 10.3, and 10.4 are defined in areas of elevator shaft 2 where no shaft doors 2.1, 2.2, 2.3, 2.4, 2.5, and 2.6 are located. The alternative positions 10.1, 10.2, 10.3, and 10.4 are defined in areas of elevator shaft 2 where no shaft doors 2.1, 2.2, 2.3, 2.4, 2.5, and 2.6 are located.4 results in a significantly reduced distance that each car 4.1, 4.2 must travel to avoid one of the landing positions 3.2, 3.3, 3.4, 3.5. This significantly reduced distance results in a significantly reduced energy and time expenditure for the avoidance process. In . Fig. 2 this is exemplary and in direct comparison to the one in Fig. The evasive maneuver shown in Figure 1 for the first landing position 3.1 and the second landing position 3.2 is shown. If the first car 4.1 needs to approach the second landing position 3.2 along a path 9.1 indicated by an arrow, the second car 4.2 located there now only needs to be moved along a path 9.3 indicated by another arrow to the directly adjacent evasive position 10.1. The path 9.3 is significantly shorter than the path 9.2.

[0044] Furthermore, the alternate position 10.1 can also be used to prepare the second car 4.2 if it is to be moved from one of the upper landing positions 3.4, 3.6 to the second landing position 3.2, but the second landing position 3.2 is still kept free for the first car 4.1. As soon as the second landing position 3.2 becomes free, the second car 4.2 can be quickly prepared at the second landing position 3.2.

[0045] Fig. 3 shows a method 20 for operating an elevator installation 1.2 according to Fig.2. In a first step 21, a car call for a first car 4.1 from the two cars 4.1, 4.2 to a second landing position 3.2 from the landing positions 3.1, 3.2, 3.3, 3.4, 3.5, 3.6 is received at the elevator control 6. In a second step 22, the car call is algorithmically processed by the elevator control 6. The result of the algorithmic processing is an assignment of the car call to the first car 4.1, for example because the car call includes a request that can only be served by an additional function of the first car 4.1. Furthermore, the result of the algorithmic processing is a control command to the second car 4.2 to move to the alternative position 10.1. In a third step 23, the second car 4.2 of the two cars 4.1, 4.2 moves from the second landing position 3.2 into the position between two landing positions 3.2, 3.3 defined alternative position 10.1. Optionally, the method 20 can include a fourth step 24 in which the second car 4.2 is moved to the second landing position 3.2 after the first car 4.1 has left the second landing position 3.2 to serve the car call. In the example described here, the travel of the first car 4.1 requested by the car call takes place from the second landing position 3.2 to the first landing position 3.1, so that the second car 4.2, which has moved to the alternative position 10.1, does not impede the travel. List of reference symbols 1.1 Elevator system 1.2 Elevator system 2 Elevator shaft of the elevator system 2.1 Shaft door of the elevator system 2.2 Shaft door of the elevator system 2.3 Shaft door of the elevator system 2.4 Shaft door of the elevator system 2.5 Shaft door of the elevator system 2.6 Shaft door of the elevator system 3.1 Landing position of the elevator system 3.2 Landing position of the elevator system 3.3 Landing position of the elevator system 3.4 Landing position of the elevator system 3.5 Landing position of the elevator system 3.6 Landing position of the elevator system 4.1 first car of the elevator system 4.2 second car of the elevator system 6 Elevator control of the elevator system 6.1 Non-volatile memory of the elevator control 8.1 first landing position pair 8.2 second landing position pair 8.3 third landing position pair 9.1 Travel path of the first car 9.2 Travel path of the second car 9.3 Travel path of the second car 10.1 first alternative position 10.2 second alternative position 10.3 third alternative position 10.4 fourth alternative position 20 Procedures for operating an elevator system 21 First step - Receiving a car call for a first car 22 second step - algorithmic processing of the car call 23 third step - avoiding the second car 24 fourth step - moving the second car QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] EP 1 915 308 A2

[0006]

Claims

[1] Lift system (1.2), comprising an elevator shaft (2) with at least three landing positions (3.1, 3.2, 3.3, 3.4, 3.5, 3.6) defined by shaft doors (2.1, 2.2, 2.3, 2.4, 2.5, 2.6); at least two elevator cars (4.1, 4.2) movable in the elevator shaft (2) on the same travel lane for serving the landing positions (3.1, 3.2, 3.3, 3.4, 3.5, 3.6); and an elevator control (6); wherein the elevator control (6) is configured to move the elevator cars (4.1, 4.2) into the landing positions (3.1, 3.2, 3.3, 3.4, 3.5, 3.6) in accordance with elevator car calls and to stop them in the landing positions (3.1, 3.2, 3.3, 3.4, 3.5, 3.6); characterized byin that the elevator control (6) is further configured to move at least one elevator car (4.1, 4.2) from one of the landing positions (3.1, 3.2, 3.3, 3.4, 3.5, 3.6) into an escape position (10.1, 10.2, 10.3) defined between two landing positions (3.1, 3.2, 3.3, 3.4, 3.5, 3.6) in a landing door-free area of ​​the elevator shaft (2) and to stop it in the escape position (10.1, 10.2, 10.3). [2] Elevator installation (1.2) according to claim 1, wherein the landing positions (3.1, 3.2, 3.3, 3.4, 3.5, 3.6) form at least one landing position pair (8.1, 8.2, 8.3) from two immediately adjacent landing positions (3.1, 3.2, 3.3, 3.4, 3.5, 3.6) and wherein the landing position (3.1, 3.2, 3.3, 3.4, 3.5, 3.6) of a respective landing position pair (8.1, 8.2, 8.3) are each assigned to a different one of the two elevator cars (4.1, 4.2). [3] Elevator installation (1.2) according to claim 2, wherein the alternative position (10.1, 10.2, 10.3) is arranged immediately adjacent to a pair of landing positions (8.1, 8.2, 8.3). [4] Elevator installation (1.2) according to claim 2 or 3, wherein at least one pair of landing positions (8.1, 8.2, 8.3) has immediately adjacent alternative positions (10.1, 10.2, 10.3) arranged on both sides. [5] Elevator installation (1.2) according to one of the preceding claims, wherein the elevator shaft (2) has an even number of landing positions (3.1, 3.2, 3.3, 3.4, 3.5, 3.6) defined by shaft doors (2.1, 2.2, 2.3, 2.4, 2.5, 2.6), which exclusively form landing position pairs (8.1, 8.2, 8.3). [6] Lift installation (1.2) according to one of the preceding claims, wherein at least one of the elevator cars (4.1, 4.2) has at least one additional function compared to the other elevator car (4.1, 4.2). [7] Lift installation (1.2) according to one of the preceding claims, designed as a shuttle lift with landing positions (3.1, 3.2, 3.3, 3.4, 3.5, 3.6) exclusively in distribution landing positions of a building, wherein the distance between the distribution landing positions corresponds to a multiple of a lift car extension in the direction of the travel lane. [8] Method (20) for operating an elevator installation (1.2) according to one of the preceding claims, comprising the steps: Receiving (21), at the elevator control (6), a car call for a first car (4.1) from the two cars (4.1, 4.2) to a second landing position (3.2) from the landing positions (3.1, 3.2, 3.3, 3.4, 3.5, 3.6); algorithmic processing (22) of the car call by means of the elevator control (6); and Evasion (23) of the second car (4.2) from the two cars (4.1, 4.2) from the second landing position (3.2) into the evasive position (10.1, 10.2, 10.3) defined between two landing positions (3.1, 3.2, 3.3, 3.4, 3.5, 3.6). [9] Method (20) according to claim 8, wherein the car call comprises a request for an additional function which the first car (4.1) has compared to the second car (4.2). [10] Method (20) according to one of claims 8 or 9, wherein the second landing position (3.2) is assigned to the second car (4.2) and forms a landing position pair (8.1, 8.2, 8.3) with a first of the landing positions (3.1), wherein the first landing position (3.1) is assigned to the first car (4.1). [11] Method (20) according to claim 10, wherein the car call is a destination car call and the first landing position (3.1) is the destination load position. [12] Method (20) according to one of claims 8 to 11, further comprising the step of moving (24) the second car (4.2) into the second landing position (3.2) after the first car (4.1) has left the second landing position (3.2) to serve the car call.

Images