Drive shaft for a plurality of supporting means of a lift system

Abstract

The invention relates to a drive shaft (1.1, 1.2, 1.3) for a plurality of supporting means (24.1,..., 24.4) of a lift system (20), comprising: at least one drive section (10) for the rotationally fixed coupling of a drive device (23), and at least two supporting means sections (2.1,..., 2.6), each having circumferential contact surfaces (3.1,..., 3.6) for receiving and driving supporting means (24.1,..., 24.4) of the lift system (20), wherein the supporting means sections (2.1,..., 2.6) are each formed on different shaft elements (5.1, 5.2, 5.3), which are releasably connected to one other in a centred and rotationally fixed manner to form the drive shaft (1.1, 1.2, 1.3). The invention further relates to a lift system (20) having such a drive shaft (1.1, 1.2, 1.3).

Description

[0001] Drive shaft for several support elements of an elevator system

[0002] Technical area

[0003] The following explanations concern a drive shaft for several support elements of an elevator system.

[0004] Furthermore, the following embodiments relate to an elevator system with at least one elevator shaft, at least one elevator car, several support means and an aforementioned drive shaft for receiving and driving the support means.

[0005] Technical background

[0006] Elevator systems for the vertical transport of people and / or goods are an integral part of modern residential and commercial buildings. A typical elevator system comprises one or more elevator shafts in which one or more elevator cars are moved between landing positions by means of drives such as suspension drives or linear drives.

[0007] In conventional suspension drives, ropes are often used as the suspension element, which are held and driven by traction sheaves, with the traction sheaves being attached to drive shafts. Due to the comparatively low tolerance of ropes to alternating bending, such traction sheaves are usually designed with a relatively large diameter. Alternatively, chains are also used as the suspension element, which rely on relatively complex gears attached to the drive shaft for holding and driving.

[0008] To avoid the disadvantages of the aforementioned suspension elements, it is already known to use belts as suspension elements. These belts can be held and driven on a contact surface of a much smaller diameter due to their significantly greater tolerance to alternating bending. In particular, thanks to the small diameter, such a contact surface can technically expediently be formed directly on the drive shaft. However, drive shafts with contact surfaces provided directly on them are complex and therefore expensive to manufacture. In particular, it is usually necessary to adapt the drive shaft to the specific design and installation situation in an elevator system, including with regard to the axial extent and the axial distances between individual shaft sections, which means that the drive shaft is particularly expensive to manufacture as a custom-made product for a specific elevator system.

[0009] From DE 10 2019 120 992 Al, for example, ammunition lifts or provisions lifts for ships are known, with which goods such as ammunition or provisions can be moved within a ship and which have a belt-like pulling device.

[0010] Description - Technical solution

[0011] Based on this situation, one of the tasks at hand is to simplify the drive shaft, in particular to simplify the manufacture of a drive shaft, in elevator systems with support means directly attached to the drive shaft.

[0012] The present problem is solved by the features of the independent main claims. Advantageous embodiments are specified in the subclaims. To the extent technically feasible, the teachings of the subclaims can be combined arbitrarily with the teachings of the main and subclaims.

[0013] In particular, the object is accordingly achieved by a drive shaft for a plurality of support means of an elevator installation, comprising: at least one drive section for the rotationally fixed coupling of a drive device and at least two support means sections, each with circumferential contact surfaces for receiving and driving support means of the elevator installation, wherein the support means sections are each formed on different shaft elements which are detachably connected to one another to form the drive shaft in a centered and rotationally fixed manner.

[0014] 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.

[0015] Where ordinal numbers ("first", "second", etc.) are used, for example to designate a component, an element, a process step, or a process 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 with the same ordinal number can also be provided, for example, multiple "first components."

[0016] A drive shaft is a rotating, elongated machine element, particularly with circular cross-sections, used to transmit rotary motion and torque. In particular, a drive shaft has a greater axial extension than radial extension and is therefore essentially cylindrical in shape. In an elevator system, the rotary motion or torque is transmitted between a drive device of the elevator system and the support means attached to a car. A drive shaft is typically supported by at least two pivot bearings. When transmitting torque, the drive shaft is subjected to torsional stress.

[0017] A support element is generally designed as a belt, strap, rope, chain, or the like and carries tensile loads in the direction of its longitudinal extension. Insofar as the present disclosure primarily relates to support elements that bear directly against the drive shaft, i.e., for which a force- or torque-transmitting surface is formed on a surface of the shaft, these are designed in particular as belts, for example as flat belts, V-belts, or toothed belts, or as straps. A belt is characterized in particular by having a flat cross-section.

[0018] As understood herein, an elevator system is configured, for example, with at least one vertical elevator shaft and at least one car, but may also comprise multiple elevator shafts, in particular multiple parallel vertical elevator shafts, and / or multiple cars, in particular multiple cars in one elevator shaft. A car is held on a first side by the drive shaft by means of the support means and driven via the support means, with a drive device transmitting the drive torque to the support means via the drive shaft. The support means is further preferably connected on a second side by the drive shaft by means of the support means to a counterweight assigned to the car. A drive device is arranged, in particular, in a machine room above the elevator shaft(s) or in an upper section of an elevator shaft, the so-called shaft head.

[0019] A drive section is designed, in particular, for engagement with a drive device having a corresponding geometry, for example, with teeth, a wedge, or a non-circular geometry, and can be inserted, for example, into a corresponding receptacle of the drive device. A rotationally fixed connection is understood to mean that a rotational movement or torque can be transmitted via the connection in a substantially wear-free and backlash-free manner. The drive section can also be indirectly connected to the drive device via a gear. A drive device can be, for example, an electric machine, a pneumatic machine, or a hydraulic machine.A drive section can be formed with at least one support means section on the same shaft element or can also be provided on a further shaft element without a support means section provided thereon, in particular on a shaft element without any further section.

[0020] A suspension element section has, in particular over an axial extent corresponding to a width of a suspension element, a contact surface on which the suspension element can be held and driven in a rotationally fixed manner for the expected drive loads. Depending on the suspension element, the rotational stability can be achieved, for example, by positive locking or frictional locking. The contact surface is, for example, machined and / or shaped accordingly, and thus has, for example, corresponding surface qualities or geometries. For a flat belt, the contact surface can be cylindrical or convex, in particular. The suspension element wraps around the suspension element section and bears against the contact surface along a wrap angle. If the drive shaft has at least two suspension element sections, these are, for example, suspension element sections for suspension elements connected redundantly to the same car.However, it is also and particularly within the meaning of the present disclosure that the at least two support means sections are provided for support means connected to different elevator cars, which are held by the same drive shaft and driven synchronously.

[0021] A shaft element forms part of the shaft, so that the shaft is the totality of the interconnected shaft elements. A shaft element differs from a component mounted on the shaft in that it participates in the transmission of the rotary motion or torque along the shaft over the majority of its radial extent, thus being subject to torsional load, and is particularly integrated into the elongated geometric shape of the shaft. If two shaft elements are connected to each other in a centered manner, their axes of symmetry are coaxially aligned due to the connection.

[0022] The above-described solution to the problem with a drive shaft now includes the teaching that, for drive shafts with multiple support element sections, these can be designed modularly from multiple shaft elements. The shaft elements can then be designed as essentially standardized components, in particular as a limited number of different standardized components, and can be assembled into an individual drive shaft depending on the design and installation situation of an elevator system. Consequently, the teaching disclosed here allows drive shafts to be formed with a different number of support element sections, as well as different axial extensions and axial distances between the support element sections, without each having to be custom-made.The drive shaft is therefore of a simpler design overall and, thanks to the standardization of the shaft elements, is particularly simpler and more cost-effective to manufacture than conventional drive shafts.

[0023] As an alternative to the features described above, or in a preferred embodiment of the above, the circumferential contact surfaces are designed for the frictional and / or positive-locking reception of support means of the elevator system designed as belts, in particular for the frictional reception of flat belts. The contact surface is in particular cylindrical for a flat belt or slightly convex for guiding the belt and has an axial extent corresponding to the width of the support means. To guide, for example, a toothed or V-belt, the contact surface is contoured or toothed in a corresponding embodiment. With a belt, particularly small shaft diameters can be achieved due to its relatively high tolerance to alternating bending, so that the drive shaft can be designed to be compact and therefore space-saving.Such a drive shaft is particularly suitable for installation in a confined shaft head in a machine room-less elevator system.

[0024] As an alternative to the features described above, or in a preferred embodiment of the above, the shaft elements are each designed as one-piece shaft sections. A one-piece shaft section is understood to mean that the entire cross-section of the shaft in the region of the shaft element is formed by the shaft element. The shaft sections are, for example, shaft stumps that together form the shaft. Particularly advantageously, the shaft can then be formed from relatively few parts, wherein the transmission of the rotary movement or torque between the shaft sections can be provided by simple means, for example by a coupling or another type of axial positive or non-positive connection.

[0025] In a preferred embodiment of the immediately above-described embodiment, the shaft sections have centering pin receptacles for centering relative to one another, or one shaft section has a centering pin receptacle and a corresponding shaft section forms a centering pin. A centering pin can be inserted into a centering pin receptacle with a fit sufficiently precise to center the shaft elements relative to one another. The centering pin can be a separate component that is inserted into a centering pin receptacle of one of the shaft elements before the shaft elements are connected, or the centering pin can be formed as a shoulder on a shaft section, in particular with a tolerance sufficiently small for centering. The centering pin receptacles enable simple centering of the shaft sections relative to one another in a coaxial manner.As an alternative to the features immediately above, or in a preferred embodiment of the immediately above, the shaft sections form a claw coupling for a rotationally fixed connection to one another. Claw elements are then provided on the shaft sections, particularly in the region of an outer diameter, which can be arranged alternately with one another and engage with one another in the circumferential direction. These claw elements, for example in the case of a composite drive shaft, form a collar (also referred to as a rim). In particular, the collar also serves to axially delimit one or more contact surfaces of the support element sections. The claw coupling enables high torques to be transmitted easily and reliably between the shaft sections.

[0026] As an alternative to the features described above, or in a preferred embodiment of the above, the shaft elements are each designed as shaft rings for sliding onto a continuous shaft core. In contrast to a shaft section, a shaft ring has a central receptacle for the shaft core and only optionally means for transmitting the rotary movement or torque to an adjacent shaft element. The shaft core is preferably designed with a simple geometry over a substantial part of the axial extent or the entire axial extent of the drive shaft and transmits the rotary movement or torque in the axial direction. By providing a shaft core, it is achieved that part of the shaft, namely the part formed by the shaft core, can extend over greater axial lengths than a shaft element, thus enabling particularly reliable transmission of a rotary movement or torque.a torque along the axial extent of the drive shaft is achieved.

[0027] In a preferred embodiment of the immediately above-described embodiment, the shaft rings form a rotationally fixed positive connection with the shaft core. This positive connection enables a simple and reliable transmission of the rotational movement or torque from the shaft core to a shaft ring.

[0028] As an alternative to the features described above, or in a preferred embodiment of the above, at least one support element section extends axially over the entire shaft element. The shaft element thus provides only the support element section and no other sections of the drive shaft, thus enabling particularly flexible positioning of the support element section on or in the drive shaft.

[0029] As an alternative to the features described above, or in a preferred embodiment of the above, it is provided that at least one shaft element has a plurality of support means sections. In particular, a shaft element can have a plurality of support means sections, but without having further sections of the drive shaft beyond the plurality of support means sections. Such a configuration is particularly advantageous where a plurality of support means are regularly driven alongside one another, for example in the case of redundant support means of the same elevator car that are guided parallel to one another. By providing a plurality of support means sections on the same shaft element, the number of shaft elements for producing the drive shaft is advantageously reduced compared to a shaft with one shaft element per support means section.

[0030] As an alternative to the features described above, or in a preferred embodiment of the above, the drive shaft is provided with at least one spacer section for bridging a distance between two support member sections, wherein the spacer section is in particular assigned to a further shaft element. A spacer section is therefore designed, for example, as a spacer and can have a particularly simple geometry, for example simply cylindrical. A spacer section can, for example, be manufactured as a semi-finished product of a specific length and then cut to the required distance during production of the respective drive shaft. Advantageously, by providing a spacer section, the drive shaft can be easily and individually adapted to a particular design and installation situation of an elevator system.

[0031] As an alternative to the features described above, or in a preferred embodiment of the above, it is provided that at least one shaft element has a support member section and the drive section, or a support member section and a bearing section for receiving a shaft bearing. A bearing section is particularly provided and designed such that a rolling bearing is joined or held thereon. In this way, for corresponding elevator systems in which arrangements of support member sections to drive sections or bearing sections are repeated, the number of individual parts for manufacturing the drive shaft can advantageously be kept low. The drive section or bearing section can advantageously be designed with a sufficient length to select or adjust the distance of the support member section or the support member sections to a drive device or to a shaft bearing within a certain range.A bearing section can also be provided on a further shaft element without a support means section provided thereon, in particular on a shaft element without any further section.

[0032] The object is further achieved by an elevator system comprising: at least one vertically extending elevator shaft, at least one elevator car movable along the elevator shaft and a plurality of support means assigned to one or more elevator cars, wherein the plurality of support means are driven together via a drive shaft according to one of the preceding claims by means of a drive device coupled to the drive section.

[0033] The above solution to the problem with an elevator system includes the teaching that the drive shaft is designed as a drive shaft as described above, and the advantages described above are accordingly transferred to the elevator system. The elevator system is thus particularly simple in design and can be manufactured easily and cost-effectively.

[0034] In a preferred embodiment of the immediately above-described features, the plurality of support means are designed as belts, in particular as flat belts, and each frictionally wraps around the drive shaft in a support means section. In this way, the drive shaft can be designed with a particularly small diameter, and the elevator system can thus be designed particularly compactly. In particular, the compact design enables the drive shaft and / or the drive device to be provided in a confined shaft head.

[0035] As an alternative to the features described immediately above, or in a preferred embodiment of the features described immediately above, it is provided that at least two elevator cars are arranged one above the other in the elevator shaft as a double-decker. The support elements of the elevator cars are then driven synchronously by the same drive shaft, for which purpose the drive shaft has several support element sections assigned to the respective support elements. The advantages described above with regard to the drive shaft can then be achieved or utilized to a particularly high degree in the elevator system.

[0036] Short description of the drawings

[0037] 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.

[0038] The drawings show

[0039] Fig. 1a is a perspective view of several shaft elements of a drive shaft for an elevator installation in a first embodiment with three support means sections;

[0040] Fig. 1b is an exploded view of the shaft elements according to Fig. 1a;

[0041] Fig. 1c is a sectional view through the shaft elements according to Fig. 1a or according to Fig. 1b;

[0042] Fig. 2 is an exploded view of a drive shaft for an elevator installation in a second embodiment with six support means sections; and

[0043] Fig. 3 is a highly schematic representation of an elevator system.

[0044] Detailed description of the drawings

[0045] 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. Figures 1a, 1b and 1c show a section of a drive shaft 1.1 for several support means (not shown) according to a first embodiment. The drive shaft 1.1 has a first support means section 2.1 for receiving and driving a first support means, a second support means section 2.2 for receiving and driving a second support means, and a third support means section 2.3 for receiving and driving a third support element. The support element sections 2.1, 2.2, 2.3 each have contact surfaces 3.1, 3.2, 3.3, which, as can be seen particularly in Figure 1c, are slightly convex for guiding the support elements.

[0046] The support element sections 2.1, 2.2, 2.2 are each arranged on shaft elements 5.1, 5.2, 5.3 designed as shaft sections, as shown particularly in Figures 1b and 1c. The shaft elements 5.1, 5.2, 5.3 each have corresponding claws 6, by means of which they form claw couplings 7. The shaft elements 5.1, 5.2, 5.3 are connected to one another in a rotationally fixed manner via the claw couplings 7. Furthermore, the claw couplings 7 form collars 9, by means of which the respective support element sections 2.1, 2.2, 2.3 are limited in their extension along an axial direction A. At one axial end, the drive shaft 1.1 further comprises claws 4 for connecting the first shaft element 5.1 or the third shaft element 5.3 with further shaft elements, of which in particular at least one has a drive section.

[0047] As shown particularly in Figures 1b and 1c, the shaft elements 5.1, 5.2, 5.3 further comprise centering pin receptacles 8, wherein centering pins (not shown) inserted into the centering pin receptacles 8 coaxially align adjacent and axially adjacent shaft elements 5.1, 5.2, 5.3. The claw couplings 7 and the centering pin receptacles 8 or the centering pins allow the shaft elements 5.1, 5.2, 5.3 to be joined together to form the drive shaft 1.1.

[0048] Figure 2 shows a drive shaft 1.2 for a plurality of support means (not shown) according to a second embodiment, which corresponds to the drive shaft 1.1 in many features and will not be explained again in this regard. The drive shaft 1.2 is formed from only two shaft elements 5.1, 5.2 designed as shaft sections, wherein the first shaft element 5.1 has a brake section 11 designed as a toothed pin for coupling the drive shaft 1.1 to a brake, as well as two support means sections 2.1, 2.2 for receiving and driving a first support means and a second support means (each not shown) with a collar 9 located therebetween. The first shaft element 5.1 further has claws 6 for forming a claw coupling 7 with the second shaft element 5.2, as well as a centering pin receptacle 8 (hidden in Figure 2).

[0049] The second shaft element 5.2 has a drive section 10 for coupling a drive device and four support member sections 2.3, 2.4, 2.5, 2.6 for receiving and driving a third support member, a fourth support member, a fifth support member, and a sixth support member (each not shown) with collars 9 located therebetween. The second shaft element 5.2 further has claws 6 for forming a claw coupling 7 with the first shaft element 5.1 and a centering pin receptacle 8.

[0050] The support element sections 2.1, 2.2, 2.3, 2.4, 2.5, 2.6 each have contact surfaces 3.1, 3.2, 3.3, 3.4, 3.5, 3.6, which are slightly convex to guide the support elements.

[0051] Figure 3 shows a highly schematic representation of an elevator system 20 with an elevator shaft 21 in which two elevator cars 22.1, 22.2 can be moved between landing positions not shown in detail. A drive device 23 is arranged in a shaft head 21.1, which can be designed, for example, as an electric machine, pneumatic machine, or hydraulic machine.

[0052] Drive device 23, a drive shaft 1.3 is accommodated in a third embodiment via a drive section 10, which has four support means sections 2.1, 2.2, 2.3, 2.4 for receiving and driving a first support means 24.1, a second support means 24.2, a third support means 24.3 and a fourth support means 24.4. The

[0053] The suspension elements 24.1, 24.2, 24.3, and 24.4 are designed as flat belts and are connected in pairs on a first side of the drive shaft 1.3 in a redundant manner to the two cars 22.1, 22.2 for their drive. The connection is shown in a highly simplified manner and can, for example, be designed in a known manner according to a 1:1 suspension or a 1:2 suspension. Furthermore, the suspension elements 24.1, 24.2, 24.3, and 24.4 are connected to counterweights on a second side of the drive shaft 1.3 in a manner not shown.

[0054] The drive shaft 1.3 has a first shaft element 5.1, which has the first support section 2.1, a second shaft element 5.2, which has the second support section 2.2 and a third shaft element 5.3, which has the third

[0055] Supporting element section 2.3 and the fourth supporting element section 2.4. The drive shaft 1.3 further has a brake section 11, at which the drive shaft 1.3 is accommodated in a brake 25.

[0056] List of reference symbols

[0057] 1.1 Drive shaft

[0058] 1.2 Drive shaft

[0059] 1.3 Drive shaft

[0060] 2.1 first support section

[0061] 2.2 second support section

[0062] 2.3 third support section

[0063] 2.4 fourth support section

[0064] 2.5 fifth support section

[0065] 2.6 sixth support means section

[0066] 3.1 first investment area

[0067] 3.2 second investment area

[0068] 3.3 third investment area

[0069] 3.4 fourth contact surface

[0070] 3.5 fifth investment area

[0071] 3.6 sixth contact surface

[0072] 4 claws

[0073] 5.1 first wave element

[0074] 5.2 second wave element

[0075] 5.3 third wave element

[0076] 6 claws

[0077] 7 claw coupling

[0078] 8 Centering pin holder

[0079] 9 collars

[0080] 10 Drive section

[0081] 11 braking section

[0082] 20 elevator system

[0083] 21 Elevator shaft

[0084] 21.1 Shaft head of the elevator shaft

[0085] 22.1 first car

[0086] 22.2 second car

[0087] 23 Drive device 24.1 First support means

[0088] 24.2 second support means

[0089] 24.3 third load-bearing element

[0090] 24.4 fourth support element 25 brake

[0091] A axial direction

Claims

Claims 1. Drive shaft (1.1, 1.2, 1.3) for several support means (24.1, . . . , 24.4) of a lift installation (20), comprising: at least one drive section (10) for the rotationally fixed coupling of a Drive device (23); and at least two support means sections (2.1, . . ., 2.6), each with circumferential contact surfaces (3.1, . . ., 3.6) for receiving and driving support means (24.1, . . ., 24.4) of the elevator installation (20); wherein the support means sections (2.1, ..., 2.6) are each formed on different shaft elements (5.1, 5.2, 5.3) which are detachably connected to one another in a centered and rotationally fixed manner to form the drive shaft (1.1, 1.2, 1.3).

2. Drive shaft (1.1, 1.2, 1.3) according to claim 1, wherein the circumferential contact surfaces (3.1, . . ., 3.6) are designed for the frictional and / or positive reception of support means (24.1, ..., 24.4) of the elevator installation (20) designed as belts, in particular for the frictional reception of flat belts.

3. Drive shaft (1.1, 1.2, 1.3) according to claim 1 or 2, wherein the shaft elements (5.1, 5.2, 5.3) are each formed as one-piece shaft sections.

4. Drive shaft (1.1, 1.2, 1.3) according to claim 3, wherein the shaft sections have centering pin receptacles (8) for centering against one another or one shaft section has a centering pin receptacle (8) and a corresponding shaft section forms a centering pin.

5. Drive shaft (1.1, 1.2, 1.3) according to one of claims 3 or 4, wherein the shaft sections form a claw coupling (7) for rotationally fixed connection to one another.

6. Drive shaft (1.1, 1.2, 1.3) according to claim 1 or 2, wherein the shaft elements (5.1, 5.2, 5.3) are each designed as shaft rings for sliding onto a continuous shaft core.

7. Drive shaft (1.1, 1.2, 1.3) according to claim 6, wherein the shaft rings form a rotationally fixed positive connection with the shaft core.

8. Drive shaft (1.1, 1.2, 1.3) according to one of the preceding claims, wherein at least one support means section (2.1, . . ., 2.6) extends axially over the entire shaft element (5.1, 5.2, 5.3).

9. Drive shaft (1.1, 1.2, 1.3) according to one of the preceding claims, wherein at least one shaft element (5.1, 5.2, 5.3) has a plurality of support means sections (2.1, ..., 2.6).

10. Drive shaft (1.1, 1.2, 1.3) according to one of the preceding claims, comprising at least one spacer section for bridging a distance between two Supporting means sections (2.1, ..., 2.6), wherein the spacer section is in particular assigned to a further shaft element (5.1, 5.2, 5.3).

11. Drive shaft (1.1, 1.2, 1.3) according to one of the preceding claims, wherein at least one shaft element (5.1, 5.2, 5.3) has a support means section (2.1, ..., 2.6) and the drive section (10) or a support means section (2.1, . . ., 2.6) and a bearing section for receiving a shaft bearing.

12. Elevator installation (20), comprising: at least one vertically extending elevator shaft (21); at least one elevator car (22.1, 22.2) movable along the elevator shaft (21); and a plurality of elevator cars (22.1, 22.2) assigned to one or more elevator cars (22.1, 22.2). Support means (24.1, ..., 24.4); characterized in that the plurality of support means (24.1, . . ., 24.4) are driven together via a drive shaft (1.1, 1.2, 1.3) according to one of the preceding claims by means of a drive device (23) coupled to the drive section (10).

13. Elevator installation (20) according to claim 12, wherein the plurality of support means (24.1, ..., 24.4) are designed as flat belts and frictionally wrap around the drive shaft (1.1, 1.2, 1.3) in each case in a support means section (2.1, . . . , 2.6).

14. Elevator installation (20) according to claim 12 or 13, wherein at least two Cars (22.1, 22.2) are arranged one above the other as double-deckers in the elevator shaft (21).

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