Elevator system

Abstract

The invention relates to an elevator system (10) comprising a first elevator car (12) and a first counterweight (52) in an elevator shaft (11), wherein the first elevator car (12) is connected to the first counterweight (52) by means of a first support element (22) which can be driven by a first drive machine (32), and a second elevator car (13) and a second counterweight (53) arranged below the first elevator car (12) in the elevator shaft (11), wherein the second elevator car (13) is connected to the second counterweight (53) by means of a second support element (23) which can be driven by a second drive machine (33).

Description

[0001] The invention relates to an elevator system comprising a first elevator car and a first counterweight in an elevator shaft, wherein the first elevator car is connected to the first counterweight by means of a first support element driven by a first drive motor, and a second elevator car and a second counterweight arranged below the first elevator car in the elevator shaft, wherein the second elevator car is connected to the second counterweight by means of a second support element driven by a second drive motor. The first support element is guided by means of first deflection devices and the second support element by means of second deflection devices in such a way as to prevent contact between the first and second counterweights as well as contact between the first and second elevator cars, and the first and / or the second support element is designed as a belt.

[0002] A well-known technical principle for operating elevator systems, or for the vertical movement of elevator cars within an elevator shaft, is based on the use of suspension cables. Typically, a counterweight and an elevator car are connected by a suspension element in the form of a suspension cable and are usually moved in opposite directions within a shaft.

[0003] Solutions exist where multiple elevator cars are housed in a single elevator shaft to increase transport capacity. One challenge here is arranging the counterweights and load-bearing elements between them and the cars in such a way as to utilize the shaft space efficiently and minimize the amount of room required for these components. Belts in various designs, configurations, and quantities can also be used as suspension cables. Using such belts presents particular challenges because their geometry requires them to run flat and they typically cannot be arranged at an angle.

[0004] Against this background, it is an object of the present invention to propose an improved elevator system, in particular to enable efficient use of the shaft cross-section. Specifically, the elevator system is to be improved in such a way that a space-saving arrangement of counterweights is made possible.

[0005] To solve this problem, an elevator system according to the independent claim is proposed. Further embodiments and additional features are described in the dependent claims and the following description.

[0006] A first aspect of the proposal is an elevator system comprising a first elevator car and a first counterweight in an elevator shaft, wherein the first elevator car is connected to the first counterweight by means of a first load-bearing element driven by a first drive motor, and a second elevator car and a second counterweight arranged below the first elevator car in the elevator shaft, wherein the second elevator car is connected to the second counterweight by means of a second load-bearing element driven by a second drive motor. The first load-bearing element is guided by means of first deflection devices and the second load-bearing element by means of second deflection devices in such a way as to prevent contact between the first and second counterweights as well as contact between the first and second elevator cars.The first and / or second load-bearing element is designed as a belt, and the deflection devices are designed, for example, as pulleys. The first counterweight and the second counterweight can be guided by means of a common guide device, or the first counterweight can be guided by means of a first guide device on one side of the elevator shaft, and the second counterweight by means of a second guide device on a second side of the elevator shaft adjacent to the first side, so that a cross-section of the elevator shaft can be used in an optimized manner.

[0007] When the first and second counterweights are guided by a common guide device, which may, for example, have two opposing guide rails, the two counterweights are arranged one above the other, with the second counterweight typically being located above the first counterweight in the elevator shaft, thereby reducing the cross-section of the elevator shaft used by the two counterweights compared to a side-by-side arrangement of the counterweights.

[0008] By positioning the first and second counterweights on different sides of the elevator shaft or elevator car(s), particularly at an angle of approximately 90° to each other, the length and / or width of the elevator shaft can be reduced and / or utilized more efficiently compared to positioning the counterweights side by side or on opposite sides of the elevator shaft or elevator car(s). For example, the first counterweight can be positioned to the side of the elevator shaft or the car doors, while the second counterweight can be positioned behind the elevator car or opposite the access side of the elevator shaft or the car doors. This allows the belts to be positioned at a distance from each other, ensuring, for example, a safe distance between them.

[0009] A guide device can have two opposing guide rails, with at least one counterweight arranged between these two guide rails. A guide rail has, for example, a profile which can interact with the counterweight in a form-fitting manner, such as a T-profile, and is attached to a shaft wall by means of a support structure or one or more fastening devices. Within the elevator shaft, at least two guide rails forming a guide device are arranged, in particular, straight, parallel to each other, and opposite each other. Within the scope of the invention, a guide device can also be formed by a single guide rail, on which a counterweight can be guided, in particular on one side of the counterweight. Accordingly, at least one of the elevator cars can also be guided by a guide device.The counterweight or elevator car is guided between at least two guide rails, which may be located on opposite or adjacent sides of the elevator shaft. The guidance provided by the guide device allows the respective counterweight or elevator car to move stably in relation to the elevator shaft, thus preventing unwanted horizontal movement and reducing or eliminating the risk of contact between the counterweight and the lifting mechanism or elevator car.

[0010] The elevator system comprises at least two elevator cars or counterweights that travel along the elevator shaft and are each held by at least one belt and / or driven by the respective drive motor, or moved vertically. The first and / or the second drive motor is arranged, in particular, between the counterweight and the elevator car to move the load-bearing element or the belt and thus move the elevator car and the counterweight in opposite directions. Compensating devices, in accordance with the state of the art, may be provided between an elevator car and its corresponding counterweight, particularly depending on requirements and / or travel height, for the first and / or second elevator car.

[0011] The load-bearing element, or belt, is specifically designed as a flat belt and can, for example, have a rectangular cross-section. A belt can have a surface, particularly on its running surface, structured, for example, in the transverse direction, which influences its longitudinal running properties and / or the power transmission from the belt to, for example, guide or drive elements. A belt can also have two or more, at least partially separate strands, or be composed of several individual belts. Such a multi-part design can include a belt with several parallel belts or strands, and in particular, a belt can have two, three, or four belts or strands. These multi-part belts can be mounted or supported in one or two drive areas of the respective drive machine.Such multi-part belts can also use one or more parallel deflection devices for guidance.

[0012] Within a belt, synthetic fibers or steel wires can be arranged, particularly in the power transmission or longitudinal direction. Furthermore, belts usable within the scope of the present invention can have a surface or surface coating with a suitable, in particular predetermined, coefficient of friction. Since the belts are guided orthogonally to a rotational axis of a drive shaft or drive machine during operation, in order to enable optimal power or torque transmission and to avoid excessive stress on the belts, a drive axis of the respective drive machine and a deflection axis of the respective deflection devices are arranged orthogonally to the connecting axis of the guide rails in such an arrangement. By designing the load-bearing element as a belt, the driving capacity of the load-bearing element can be improved, which in particular allows the use of smaller and / or more cost-effective drive machines.

[0013] The load-bearing element or belt can be attached at one or both ends to a load-bearing element receptacle and / or to a fastening point, for example, in a shaft head and / or a machine room of the elevator shaft. The load-bearing elements can be guided by deflection devices or deflection elements, such as rollers or pulleys, and / or connected to the respective elevator car, the drive motor, and / or the counterweight. The deflection axes of the first deflection device and / or the second deflection device are arranged parallel to each other and / or parallel to the drive axes of the first drive motor and / or the second drive motor. Such a parallel arrangement of the deflection axes and / or drive axes of the respective first and / or second load-bearing elements allows for force or torque transmission across the entire width or surface of the belt(s). Furthermore, the force or torque transmission can be further optimized.Torque transmission in the direction of the belt path is uniform across all axes, so that tilting and / or misalignment of the belt can be avoided.

[0014] The invention is based in particular on the idea of ​​arranging the counterweights of two elevator cars moving within an elevator shaft, using at least one guide device, in such a way as to improve the usability of the shaft's cross-section. For this purpose, it is proposed to arrange the counterweights, or the first and second counterweights, one above the other using a shared guide device within the elevator shaft, with the guide device or guide rails defining the counterweights' travel path. The counterweights can be designed such that they lie flush one above the other in a vertical projection and / or can have different cross-sections. The support elements of the lower counterweight run laterally past the upper or second counterweight.Collisions of the counterweights arranged one above the other, as well as collisions of the elevator cabins arranged one above the other, can be prevented by means of a suitably designed control device.

[0015] Another aspect proposes arranging the counterweights on opposite sides of the elevator shaft so that they do not share a common travel path. This allows the load-bearing elements of the first elevator car and the first counterweight to be positioned independently of the load-bearing elements of the second elevator car and the second counterweight within the elevator shaft, without spatially restricting each other. Furthermore, the use of belts as load-bearing elements allows for smaller drive motors and / or smaller diameter deflection devices, thereby reducing, for example, the minimum distance between elevator cars, counterweights, and / or floors, and / or the distance between the elevator car floor or roof and the safety gear. Additionally, the improved torque and / or...Power transmission from the drive machine to the belt(s) allows for the use of smaller drive machines, which can result in a more flexible arrangement of the counterweights or improved space utilization.

[0016] In one embodiment of the proposed elevator system, the first and / or the second counterweight has a longitudinal recess for receiving the first and / or the second support element, wherein the support element(s) are guided in the longitudinal recess, in particular without contact. Such a longitudinal recess can, for example, be arranged on a side face of the counterweight if it is cuboid in shape, and may extend uniformly from an upper to a lower face of the counterweight. The longitudinal recess is provided on or in the counterweight in such a way as to ensure a symmetrical design, particularly in a top view or vertical projection, to allow the use of a compensating element on the second elevator car, which could also be guided through the longitudinal recess.For example, side sections of the counterweight can be connected by a connecting section located adjacent to the longitudinal recess. This connecting section can incorporate a deflection device or deflection mechanism, particularly in a central arrangement, to enable a balanced arrangement of the counterweights.

[0017] In one embodiment, the first longitudinal recess of the first counterweight and the second longitudinal recess of the second counterweight form a receiving channel for the first and / or second support element. This allows the support elements to be guided laterally along and / or between the counterweights within the receiving channel, thereby enabling a further reduction in cross-sectional area due to the space-saving arrangement of the support elements in the counterweights' path. The deflection elements of the first counterweight can be arranged such that they are positioned in a vertical projection within the longitudinal recess of the second counterweight, thus allowing the support element to pass through the longitudinal recess. In this arrangement, the support elements and any compensating elements can be guided in a central region or along an axis of symmetry of a counterweight cross-section, enabling a balanced configuration.

[0018] In one embodiment, the receiving channel is formed between the first and second counterweights. The longitudinal recesses of the counterweights can be arranged facing each other and / or can be at least partially aligned in a vertical projection to form the receiving channel. This allows for a central arrangement of the load-bearing elements, thus enabling a space-saving arrangement of the drive motors above the counterweights in the elevator shaft.

[0019] In one embodiment, the first counterweight is arranged below the second counterweight, and the first support element of the first counterweight is guided around the second counterweight. The first drive motor can be arranged such that it guides the support element past the second counterweight to deflection devices, in particular two deflection devices, on the first counterweight. The second drive motor can be arranged such that it allows the support element to be guided within the support element of the second counterweight to at least one deflection device of the second counterweight. The deflection devices of the first counterweight can be arranged laterally to the counterweight, with "laterally" in this context meaning, in particular, that the deflection devices are arranged on the upper or lower surface of the first counterweight and configured to guide the support element or belts past the second counterweight.This allows for a simplified and / or reduced cross-section design of the load-bearing element guidance.

[0020] The first and second drive motors can be arranged on the same side of the elevator car or above the counterweights in the elevator shaft and, in particular, guided by deflection devices attached to the elevator car or counterweights to move the elevator car or counterweight. The drive motors can be arranged, for example, above or below each other, side by side, and / or offset from each other on the same side and / or in the same or different horizontal planes to save space. Additional deflection devices can be provided to guide the load-bearing element to the deflection device(s) of the elevator car and / or counterweight. This allows for a space-saving arrangement of the counterweights.

[0021] In some embodiments, at least one first and / or fourth deflection device is arranged on the underside of the first elevator car and / or the second counterweight. In particular, two deflection devices are arranged on the underside of the first elevator car and / or the second counterweight in such a way that the load-bearing element can be guided past one side of the elevator car and / or the counterweight to the first of these deflection devices and under the elevator car or the counterweight to the second of these deflection devices, in order to be connected on the opposite side, again past the first elevator car or the counterweight, to a further deflection device and / or the drive motor of the counterweight.

[0022] In one embodiment, at least one first and / or fourth deflection device is arranged on the upper side of the first elevator car and / or the second counterweight. In this case, a deflection device on the upper side can be arranged, particularly in a central area, such that the propulsion element can be attached to the elevator shaft on one side of the deflection device and guided to the drive motor on the other side, and from there to the counterweight or the elevator car. In a further embodiment, two deflection devices can be arranged on the upper side of the first elevator car and / or the second counterweight, so that the propulsion element can be guided along the upper side of the elevator car and / or the first counterweight between the deflection devices.The lifting element can be attached to the first side of the first elevator car and / or the second counterweight, particularly above the first of the two deflection devices, within the elevator shaft. From the second of these deflection devices, the lifting element can be routed to the drive motor, from where it connects to the counterweight or the elevator car and a further attachment point.

[0023] In some embodiments, at least a second and / or third deflection device is arranged on the underside of the second elevator car and / or the first counterweight. In particular, two deflection devices are arranged on the underside of the second elevator car and / or the first counterweight in such a way that the load-bearing element can be guided past one side of the elevator car and / or the counterweight to the first of these deflection devices and under the elevator car or the counterweight to the second of these deflection devices, in order to be connected on the opposite side, again past the second elevator car or the first counterweight, to a further deflection device and / or the drive motor of the counterweight.

[0024] In one embodiment, at least a second and / or third deflection device is arranged on the upper side of the second elevator car and / or the first counterweight. In this case, a deflection device on the upper side can be arranged, particularly in a central area, such that the propulsion element can be attached to the elevator shaft on one side of the deflection device and guided to the drive motor on the other side, and from there to the counterweight or the elevator car. In a further embodiment, two deflection devices can be arranged on the upper side of the second elevator car and / or the first counterweight, so that the propulsion element can be guided along the upper side of the elevator car and / or the first counterweight between the deflection devices.The lifting element can be attached to the first side of the second elevator car and / or the first counterweight, particularly above the first of the two deflection devices, within the elevator shaft. From the second of these deflection devices, the lifting element can be routed to the drive motor, from where it connects to the counterweight or the elevator car and a further attachment point.

[0025] In one embodiment, the first guide device is arranged on a first side of the elevator shaft, and the second guide device is arranged on a second side of the elevator shaft adjacent to the first side. The first drive unit can be arranged laterally or centrally to the first elevator car, and in particular, the first drive unit is arranged in or above the elevator car such that the first load-bearing element can be guided in this central area, especially via a deflection device arranged on the top of the elevator car, in order to move the elevator car. The second drive unit can be arranged laterally to the first and / or second elevator car, in particular on a side that is adjacent to and at an angle to the side on which the first drive unit is arranged.The second drive unit can be arranged such that the load-bearing element can be guided past the first elevator car to deflection devices, in particular two deflection devices, on the second elevator car. The deflection devices are each arranged laterally to the elevator car to allow the load-bearing element to be guided around the first and / or second elevator car. This simplifies the design of the load-bearing element guidance system.

[0026] In one embodiment, the first support element for the first elevator car and the second support element for the second elevator car are perpendicular to each other in a vertical projection. The drive shafts or axes of the drive shafts of the two drive motors are oriented perpendicular to each other, and both drive motors can be arranged laterally to the elevator cars. This allows the drive motors to be arranged at an angle, with the support elements running perpendicular to each other and each positioned centrally with respect to its respective elevator car.

[0027] In one embodiment, the first drive unit has a drive zone for driving the load-bearing element. Such a drive unit can also be referred to as a drive unit with a Single Drive Zone (SDZ). In this case, several parallel strands of the load-bearing element can be driven via a single drive zone, thus enabling an improved arrangement of deflection elements or deflection devices.

[0028] In one embodiment, the second drive unit has two drive zones, each for driving one strand of a load-bearing element. Such a drive unit can also be referred to as a drive unit with a Double Drive Zone (DDZ). The load-bearing elements can be multi-part and each have several parallel belts in multiple strands per load-bearing element, whereby the two drive zones enable an improved arrangement of the load-bearing elements with respect to the elevator cars and / or the counterweights.

[0029] In one embodiment, the guide device of the first and / or the second counterweight is arranged on a guide frame that encompasses, in particular laterally, the travel path of the first and / or the second counterweight. The guide frame can extend along the vertical extent of the elevator shaft and have a rectangular cross-section, with the guide device or guide rails being arranged on two opposing inner surfaces of the guide frame or guide bracket. The guide rails can be arranged on the two side walls adjacent to a shaft wall, although other arrangements are also conceivable. The guide frame can, for example, be designed as a solid surface or as a truss structure.The guide frame allows the travel path and thus the load-bearing sections of the counterweights to be separated from the rest of the cross-section of the elevator shaft and, in particular, from the elevator car, so that contact through lateral movements can be avoided.

[0030] In one embodiment, at least one of the elevator cars is arranged between two guide rails, and at least one of the guide rails of the at least one elevator car is arranged on a guide frame. The guide rail can be arranged on an outer side of the guide frame, which can simplify the assembly of the guide device(s) and / or the guide rails.

[0031] The first and second drive motors can be arranged on the same side of the elevator car or above the counterweights in the elevator shaft and, in particular, guided by deflection devices attached to the elevator car or counterweights to move the elevator car or counterweight. The drive motors can be arranged, for example, above or below each other, side by side, and / or offset from each other on the same side and / or in the same or different horizontal planes to save space. Additional deflection devices can be provided to guide the load-bearing element to the deflection device(s) of the elevator car and / or counterweight. This allows for a space-saving arrangement of the counterweights.

[0032] In some embodiments, at least one first and / or fourth deflection device is arranged on the underside of the first elevator car and / or the second counterweight. In particular, two deflection devices are arranged on the underside of the first elevator car and / or the second counterweight in such a way that the load-bearing element can be guided past one side of the elevator car and / or the counterweight to the first of these deflection devices and under the elevator car or the counterweight to the second of these deflection devices, in order to be connected on the opposite side, again past the first elevator car or the counterweight, to a further deflection device and / or the drive motor of the counterweight.

[0033] In one embodiment, at least one first and / or fourth deflection device is arranged on the upper side of the first elevator car and / or the second counterweight. In this case, a deflection device on the upper side can be arranged, particularly in a central area, such that the propulsion element can be attached to the elevator shaft on one side of the deflection device and guided to the drive motor on the other side, and from there to the counterweight or the elevator car. In a further embodiment, two deflection devices can be arranged on the upper side of the first elevator car and / or the second counterweight, so that the propulsion element can be guided along the upper side of the elevator car and / or the first counterweight between the deflection devices.The lifting element can be attached to the first side of the first elevator car and / or the second counterweight, particularly above the first of the two deflection devices, within the elevator shaft. From the second of these deflection devices, the lifting element can be routed to the drive motor, from where it connects to the counterweight or the elevator car and a further attachment point.

[0034] In some embodiments, at least a second and / or third deflection device is arranged on the underside of the second elevator car and / or the first counterweight. In particular, two deflection devices are arranged on the underside of the second elevator car and / or the first counterweight in such a way that the load-bearing element can be guided past one side of the elevator car and / or the counterweight to the first of these deflection devices and under the elevator car or the counterweight to the second of these deflection devices, in order to be connected on the opposite side, again past the second elevator car or the first counterweight, to a further deflection device and / or the drive motor of the counterweight.

[0035] In one embodiment, at least a second and / or third deflection device is arranged on the upper side of the second elevator car and / or the first counterweight. In this case, a deflection device on the upper side can be arranged, particularly in a central area, such that the propulsion element can be attached to the elevator shaft on one side of the deflection device and guided to the drive motor on the other side, and from there to the counterweight or the elevator car. In a further embodiment, two deflection devices can be arranged on the upper side of the second elevator car and / or the first counterweight, so that the propulsion element can be guided along the upper side of the elevator car and / or the first counterweight between the deflection devices.The lifting element can be attached to the first side of the second elevator car and / or the first counterweight, particularly above the first of the two deflection devices, within the elevator shaft. From the second of these deflection devices, the lifting element can be routed to the drive motor, from where it connects to the counterweight or the elevator car and a further attachment point.

[0036] In general, features of the various exemplary aspects and / or embodiments described herein may be combined with one another, unless this is explicitly excluded in connection with the disclosure.

[0037] The following section of the description refers to the figures shown to illustrate specific aspects and embodiments of the present invention. It is understood that other aspects may be used and structural or logical modifications of the illustrated embodiments are possible without departing from the scope of the present invention. The following description of the figures is therefore not to be understood as limiting.

[0038] Each of them shows: Fig. 1a, Fig. 1b two schematic representations of a first embodiment of an elevator system according to the present disclosure; Fig. 2 a schematic representation of a second embodiment of an elevator system according to the present disclosure; Fig. 3a, Fig. 3b two schematic representations of a third embodiment of an elevator system according to the present disclosure; Fig. 4 a schematic representation of a fourth embodiment of an elevator system according to the present disclosure; Fig. 5 a schematic detailed representation of a top view of the arrangement of counterweights of a fifth embodiment of an elevator system according to the present disclosure; Fig. 6a, Fig. 6b two schematic representations of a sixth embodiment of an elevator system according to the present disclosure; Fig. 7 a schematic representation of a seventh embodiment of an elevator system according to the present disclosure; and Fig. 8 a schematic representation of an eighth embodiment of an elevator system according to the present disclosure.

[0039] In the following, identical reference symbols refer to identical or at least analogous features.

[0040] Fig. 1a and Fig. Figures 1b each show a schematic representation of an embodiment of an elevator system 10 described herein. The Fig. 1a the elevator system 10 in a schematic view from the front and the Fig. Figure 1b shows the elevator system 10 in a schematic view from below.

[0041] The elevator system 10 comprises a first elevator car 12 and a first counterweight 52, which are arranged in an elevator shaft 11. The first elevator car 12 is connected to the first counterweight 52 by means of a first suspension element 22, which is driven by a first drive motor 32. Below the first elevator car 12, a second elevator car 13 is arranged in the elevator shaft 11, the second elevator car 13 being connected to a second counterweight 53 by means of a second suspension element 23, which is driven by a second drive motor 33.

[0042] The first support element 22 is guided by means of first deflection devices 42, and the second support element 23 by means of second deflection devices 43, such that contact between the counterweights 52, 53 and the elevator cars 12, 13 is prevented. The first counterweight 25 is arranged below the second counterweight 53, and the first support element 22 of the first counterweight 52 is guided around the second counterweight 53 and the second support elements 23 by means of third deflection devices 62. The second support element 23 is guided within the first support element 22 by means of fourth deflection devices 63, such that contact between the counterweights 52, 53 and the support elements 22, 23 is prevented. The ends of the first and second support elements 22, 23 are each attached to a fastening point 14 or support element receptacle in the elevator shaft 11 or a machine room.The first and / or second support element 22, 23 is designed as a belt to improve traction and thus enable the use of smaller drives or drive motors 32, 33. This results in a reduction in space and / or costs.

[0043] In the Fig. In the embodiment shown in Figure 1a, the first drive unit 32 is arranged laterally to the first and second elevator cars 12, 13. The first support element 22 is attached at its first end to a mounting point 14 in the elevator shaft 11 and guided via the fourth deflection device 62, arranged on the first counterweight 52, to the first drive unit 32. From the first drive unit 32, the first support element 22 is guided via further deflection devices 72 to two further deflection devices 42 arranged on the underside of the first elevator car 12, around the elevator car 12, and attached at its second end to a further mounting point 14 in the elevator shaft 11.

[0044] The second drive unit 33 is located on the same side of the elevator shaft 11, lateral to the two elevator cars 12 and 13. The second suspension element 23 is guided from a mounting point 14 via the third deflection device 63, which is arranged on the second counterweight 53, to the second drive unit 33. From the second drive unit 33, the second suspension element 23 is guided around the underside of the second elevator car 13 via second deflection devices 43, which are arranged on one side of the underside of the second elevator car 13. The second suspension element 23 is then attached to a further mounting point 14 in the elevator shaft 11.

[0045] In Fig. Figure 1b shows that the first and second drive machines 32, 33 are each arranged laterally on the same side of the elevator cars 12, 13. The counterweights 52, 53 and the elevator cars 12, 13 are arranged between two guide rails 15 of a guide device 25, by means of which the counterweights 52, 53 and the elevator cars 12, 13 are guided in the elevator shaft 11.

[0046] In the illustrated embodiment, the first drive motor 32 and the second drive motor 33 each have a drive zone 30 by means of which the first and second support elements 22, 23, respectively, which are designed in multiple parts in the present embodiment, can be driven. Such a drive motor 32, 33 can also be referred to as a drive motor with a Single Drive Zone (SDZ). In the Fig. 1a and Fig. In the arrangement shown in 1b, the first and second support elements 22, 23 run parallel to each other. Furthermore, deflection axes of the deflection devices 42, 43, 62, 63 (the deflection devices are in Fig. (1b omitted for clarity) arranged parallel to each other and parallel to the drive axes of the first and second drive motors 12, 13. For clarity, the schematic representation in Fig. 1b the drive machines 32, 33 are shown uncovered, although the counterweights 52, 53 are partially arranged in front of them in a view from below.

[0047] By arranging the counterweights 52, 53 one above the other in the proposed elevator system 11 and guiding them by means of a common guide device 25, a cross-section of the elevator shaft 11 can be used in an optimized way.

[0048] The Fig. 2, Fig. 3a, Fig. 4, Fig. 6a and Fig. 7 and Fig. 3b, Fig. 6b and Fig. Figure 8 shows schematic representations of a further embodiment of an elevator system 10 described herein. The figures show Fig. 2, Fig. 3a, Fig. 4, Fig. 6a and Fig. 7 the elevator system 10 each in a schematic representation from the front and the Fig. 3b, Fig. 6b and Fig. Figures 8 show the elevator system 10 in a schematic representation from below. Since the elevator systems 10 shown are essentially the same as the elevator system made of Fig. The differences between 1a and 1b are discussed in detail below. For clarity, some reference symbols are omitted. All illustrated embodiments enable efficient use of the shaft cross-section or a space-saving arrangement of elevator components.

[0049] In the Fig. In the embodiment shown in Figure 2, the first drive unit 32 and the second drive unit 33, as well as the first and second counterweights 52, 53, are arranged on the same side of the first and second elevator cars 12, 13. The counterweights 52, 53 are arranged one above the other. The second suspension element 23 is guided from a mounting point 14 to the second drive unit 33, from which it is guided via a second deflection device 43 to two further deflection devices 43, which are arranged on the underside of the second elevator car 13.

[0050] Fig. Figure 3a shows an embodiment in which the first counterweight 52 and the second counterweight 53 can be guided by means of a common guide device 25. The second counterweight 53 has a longitudinal recess 80 for receiving the first support element 22. This allows the first support elements 22 to be guided within a cross-section of the second counterweight 53, thereby optimizing the use of a cross-section of the elevator shaft 11. The first support element 22 is guided from the first drive motor 32 via a first deflection device 42 to two further deflection devices 42 arranged on the upper side of the first elevator car 12. Fig. Figure 3b shows the longitudinal recess 80 of the second counterweight 53, in which the first support elements 22 are guided. In the cuboid configuration of the counterweight 53 shown here, the longitudinal recess 80 is located on a side surface of the counterweight 53 facing a shaft wall and extends uniformly from an upper to a lower surface of the counterweight 53.

[0051] In the Fig. In the embodiment shown in Figure 4, the second support element 23 is guided from the second drive machine 33 via two deflection devices 43 on an underside of the second elevator car 13, from which the support element 23 runs to the attachment point 14.

[0052] In the presentation of the Fig. Figure 5 shows a detailed top view of two counterweights 52, 53 of a fifth embodiment of the elevator system 10, guided by a common guide device 25. The first counterweight 52 (shown with dashed lines) is arranged below the second counterweight 53. A first longitudinal recess 82 of the first counterweight 52 and a second longitudinal recess 83 of the second counterweight 53 together form a receiving channel 84 for support elements 22, 23. For this purpose, the longitudinal recesses 82, 83 are arranged facing each other, so that the receiving channel 84 is formed between the first counterweight 52 and the second counterweight 53. This allows the support elements 22, 23 to be guided within a cross-section of at least one counterweight 52, 53, thereby optimizing the use of the cross-section of the elevator shaft 11.

[0053] At the in Fig. In the sixth embodiment of an elevator system 10 shown in Figure 6a, the first counterweight 52 is guided by a first guide device 25a on a first side of the elevator shaft 11, and the second counterweight 53 is guided by a second guide device 25b on a second side of the elevator shaft 11 adjacent to the first side and arranged perpendicular to the first side of the elevator shaft 11. This allows the load-bearing elements 22, 23 of the elevator cars 12, 13 and of the counterweights 52, 53 to be arranged independently of each other. Fig. Figure 6b shows that the first support element 22 for the first elevator car 12 and the second support element 23 for the second elevator car 13 are arranged perpendicular to each other in a vertical projection. The first counterweight 52 is arranged on the first side of the elevator shaft 11 by means of a first guide device 25a with two guide rails 15, and the second counterweight 53 is guided on the second side of the elevator shaft 11, adjacent to the first side, by means of a second guide device 25b with two guide rails 15.

[0054] In the illustrated embodiment, the first drive machine 32 has one drive section 30 and the second drive machine 33 has two drive sections 30, 31 for the belts. The drive shafts or axles of the drive shafts of the two drive machines 32, 33 are oriented perpendicular to each other, and both drive machines 32, 33 are arranged laterally, on adjacent sides, of the elevator cars 12, 13 and the elevator shaft 11, respectively. This allows the drive machines 32, 33 to be arranged diagonally in the elevator shaft 11, with the support elements 22, 23 each positioned centrally with respect to the respective elevator car 12, 13, thus enabling balanced guidance of the elevator cars 12, 13.

[0055] The in Fig. The exemplary embodiment of an elevator system 10 shown in Figure 7 essentially corresponds to the one shown in Figure 7. Fig. 6a shown embodiment with the difference that the support means 23 are guided on a top side of the second elevator car 13 by means of deflection devices 43.

[0056] The in Fig. Figure 8, the eighth embodiment of an elevator system 10, is shown in a schematic view from below. For the sake of clarity, the drive motors 32, 33 and the suspension elements 22, 23 are not shown.

[0057] A guide device 25 with two guide rails 15 for the first and second counterweights 52, 53 is arranged on a guide frame 35 that laterally encompasses the travel path of the first and second counterweights 52, 53 when viewed vertically. In the exemplary embodiment, the guide frame 35 extends over the length of the elevator shaft 11. The guide frame 35 also has a rectangular cross-section, and the guide rails 15 are arranged on two opposing inner sides of the guide frame 35. In the illustrated embodiment, the guide rails 15 are arranged on the two side walls adjacent to a shaft wall 111 of the elevator shaft 11. Furthermore, a guide rail 15, designed to guide at least one of the elevator cars 12, 13, is arranged on an outer side of the guide frame 35.This allows the travel path of the counterweights 52, 53 and thus the support means 22, 23 to be separated from the rest of the cross-section of the elevator shaft 11 and from the elevator cars 12, 13, so that contact caused by lateral movements can be avoided. Reference symbol list 10 elevator system 11 Elevator shaft 12 first elevator cabin 13 second elevator cabin 14 Attachment point 15 Guide rail of the elevator car(s) 22 first lifting device 25 Guide system 23 second lifting device 32 first drive machine 33 second drive machine 35 guide frames 42 first deflection device 43 second deflection device 52 first counterweight 53 second counterweight 62 third deflection device 63 fourth deflection device 72 additional deflection devices 80 longitudinal recess 82 first longitudinal recess 83 second longitudinal recess 84 recording channels

Claims

[1] Elevator system (10) comprising a first elevator car (12) and a first counterweight (52) in an elevator shaft (11), wherein the first elevator car (12) is connected to the first counterweight (52) by means of a first suspension element (22) driven by a first drive machine (32), and a second elevator car (13) and a second counterweight (53) arranged below the first elevator car (12) in the elevator shaft (11), wherein the second elevator car (13) is connected to the second counterweight (53) by means of a second suspension element (23) driven by a second drive machine (33), wherein the first suspension element (22) is guided by means of first deflection devices (42) and the second suspension element (23) by means of second deflection devices (43) in such a way as to provide contact between the first counterweight (52) and the second (53) as well as contact between the first and the second elevator car (12, 13) to prevent,wherein the first and / or the second support element (22, 23) is designed as a belt, wherein the first counterweight (52) and the second counterweight (53) can be guided by means of a common guide device (25), or wherein the first counterweight (52) can be guided by means of a first guide device (25a) on a first side of the elevator shaft (11) and the second counterweight (53) can be guided by means of a second guide device (25b) on a second side of the elevator shaft (11) adjacent to the first side of the elevator shaft (11), so that a cross-section of the elevator shaft (11) can be used in an optimized manner. [2] Lifting system (10) according to claim 1, wherein the first counterweight (52) and / or the second counterweight (53) has a longitudinal recess (80) for receiving the first support element (22) and / or the second support element (23). [3] Lifting system (10) according to claim 2, wherein a first longitudinal recess (82) of the first counterweight (52) and a second longitudinal recess (83) of the second counterweight (83) form a receiving channel (84) for the first support element (22) and / or for the second support element (22). [4] Lifting system (10) according to claim 3, wherein the receiving channel (84) is formed between the first counterweight and the second counterweight (53). [5] Lifting system (10) according to at least one of the preceding claims, wherein the first counterweight (52) is arranged below the second counterweight (53) and the first support element (22) of the first counterweight (52) is guided around the second counterweight (53). [6] Lift system (10) according to claim 1, wherein the first guide device (25) is arranged on a first side of the lift shaft (11) and the second guide device (25) is arranged on a second side of the lift shaft (11) adjacent to the first side of the lift shaft (11). [7] Lifting system (10) according to claim 6, wherein the first support means (22) and the second support means (23) are perpendicular to each other in a vertical projection. [8] Lifting system (10) according to claim 6 or 7, wherein the first drive machine (32) has a drive section (30) for driving the lifting element (22, 23) [9] Lifting system (10) according to at least one of claims 6 to 8, wherein the second drive machine (33) has two drive sections (30, 31) for driving each of a strand of a support element (22, 23). [10] Lifting system (10) according to at least one of the preceding claims, wherein the guide device (25a) of the first counterweight (52) and / or the guide device (25b) of the second counterweight (53) is arranged on a guide frame (35) encompassing a travel path of the first counterweight (52) and / or the second counterweight (53). [11] Lifting system (10) according to claim 10, wherein at least one of the lift cabins (12, 13) is arranged between two guide rails (15) and at least one of the guide rails (15) of the at least one lift cabin (12, 13) is arranged on the guide frame (35). [12] Lifting system (10) according to at least one of the preceding claims, wherein at least one first deflection device (42) is arranged on an underside of the first lift car (12) or at least one first deflection device (42) is arranged on an upper side of the first lift car (12). [13] Lifting system (10) according to at least one of the preceding claims, wherein at least one second deflection device (43) is arranged on an underside of the second lift car (13) or at least one second deflection device (43) is arranged on an upper side of the second lift car (13). [14] Elevator system (10) according to at least one of the preceding claims, wherein the first drive machine (32) is arranged centrally or laterally to the first elevator car (12) and the second drive machine (33) is arranged laterally to the first and / or second elevator car (12, 13). [15] Lifting system (10) according to at least one of the preceding claims, wherein the belt is multi-part.

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