CAR ASSEMBLY AND METHOD FOR MOUNTING A SCREW DRIVE IN A CAR ASSEMBLY FOR A DOUBLE-DECKER ELEVATOR

Description

[0001] The present invention relates to a car assembly for a double-decker elevator. Furthermore, the invention relates to a double-decker elevator having such a car assembly and a method for mounting a spindle drive in such a car assembly.

[0002] In addition to single-car elevators, so-called double-decker or double-decker elevators can be used to transport people and / or objects between floors of a building. A double-decker elevator is essentially characterized by a car frame in which two cars or elevator cabins are arranged one above the other. By moving the car frame with the cars arranged within it, the cars can be moved together and thus stop at two floors above one another simultaneously.

[0003] Since floor heights can vary within a building, double-decker elevators are often equipped with an adjustment mechanism that allows the vertical distance between the two elevator cars to be adjusted accordingly, for example automatically during the journey to the next stop.

[0004] The adjustment mechanism can, for example, include one or more electric spindle drives. For maintenance and repair purposes, such a spindle drive should be easily accessible and disassembled in the elevator shaft, even after the double-decker elevator has been installed.

[0005] EP 1 074 503 B1 shows an example of a double-deck elevator with two spindle drives for vertically adjusting two cars within a car frame. Each spindle drive comprises a drive motor mounted on top of the car frame.

[0006] There may therefore be a need for a car arrangement for a double-decker elevator that allows for particularly easy assembly and disassembly of a spindle drive.

[0007] In addition, there may be a need for a double-decker elevator that is easy to maintain and / or service.

[0008] Last but not least, there may be a need for a method that enables easy assembly and disassembly of a spindle drive in a car arrangement for a double-deck elevator.

[0009] These needs can be met by the subject matter of the independent claims. Advantageous embodiments are set forth in the dependent claims, the following description, and the accompanying figures.

[0010] A first aspect of the invention relates to a car assembly for a double-decker elevator. The car assembly comprises a first car, a second car, and a car frame, which is arranged displaceably in an elevator shaft of the double-decker elevator in the longitudinal direction of the elevator shaft. In an operational state of the double-decker elevator, the first car and the second car are arranged one above the other in the car frame. At least the first car is displaceable in the direction of a vertical axis along the car frame by means of a spindle drive. The spindle drive comprises a spindle mechanically coupled to the first car and a drive unit for driving the spindle. The spindle drive is guided through a recess in a support structure of the car frame. The drive unit has a housing with a fastening flange, via which the housing is fastened to the support structure.The housing can be positioned in a first position and a second position relative to the recess. The mounting flange exposes the recess in the first position, allowing the spindle drive to pass through the recess in the direction of the vertical axis, and in the second position, it projects beyond an outer edge of the recess.

[0011] The car frame can be considered a frame-like structure consisting of several supports and / or support structures. For example, when the double-decker elevator is in operation, the car frame can be guided via guide shoes and / or rollers on at least one vertically extending guide rail anchored in the elevator shaft.

[0012] In the simplest case, the car frame can be constructed, for example, from two (horizontal) crossbeams and two (vertical) longitudinal beams, which are connected to form a frame via the crossbeams. The cars can be arranged one above the other within this frame. For example, each longitudinal beam can be guided along a guide rail.

[0013] As mentioned at the beginning, the first and second car can be moved together in the elevator shaft by moving the car frame along the guide rail(s) and thus stop at two floors above one another at the same time.

[0014] Using the spindle drive, it is possible to adjust the vertical distance between the first and second car, for example to adapt the vertical distance to varying floor heights within a building.

[0015] Additionally or alternatively, the spindle drive can be designed to move the first car in the opposite direction to the second car in the direction of the vertical axis along the car frame, i.e. the two cars move towards or away from each other at the same time.

[0016] The drive unit can, for example, comprise an electric drive motor and a gearbox that couples a drive shaft of the drive motor to the spindle. Accordingly, the drive motor and gearbox can be accommodated in the housing. The drive unit can also be designed without a gearbox, so that the drive motor is directly coupled to the spindle. The spindle drive can thus be designed as a so-called direct spindle drive.

[0017] The spindle may be rotatably mounted in a spindle nut, which may be suitably attached to the first car. Rotating the spindle, depending on the direction of rotation, causes a vertical distance between the drive unit and the spindle nut, i.e., between the support structure and the first car, to shorten or lengthen.

[0018] The first and second positions of the housing may be different angular positions relative to a longitudinal axis of the housing. In other words, the housing may be rotatable about its longitudinal axis, together with the mounting flange, between the first and second positions relative to the recess.

[0019] A mounting flange can be understood as a plate- or disc-like projection that protrudes from a housing body of the housing. The mounting flange can protrude from the housing body, in particular on opposite sides. This enables stable attachment of the housing to the support structure. The mounting flange can be arranged between two ends of the housing body. Alternatively, the mounting flange can be flush with one of the ends of the housing body, i.e., be part of an end face of the housing body. The mounting flange can completely or partially surround the housing body in its circumferential direction.

[0020] In the simplest case, the support structure can be a cross member of the car frame. A support structure in the form of a combination of two or more supports is also possible. For example, an X-shaped support structure consisting of a cross member and an additional support attached to it, aligned at an angle to it, is conceivable. The support structure can have a recess for accommodating the spindle drive or two recesses, each accommodating a spindle drive (see below). The cross member can, for example, firmly connect two longitudinal members of the car frame.

[0021] A recess can be understood as a continuous opening in the support structure that connects an upper side with a lower side of the support structure.

[0022] To save space, it is expedient for the drive unit and the spindle to share a common longitudinal axis, i.e., to be arranged coaxially with respect to a longitudinal axis of the spindle drive. In this case, the spindle drive, when the double-decker elevator is in operation, can be aligned in the car frame, for example, such that the spindle extends upwards from the drive unit in a direction parallel to the vertical axis, i.e., the spindle can be mounted in an upright position. Depending on the elevator type, other spindle drive configurations are also conceivable, such as a configuration in which the spindle is mounted in a suspended position.

[0023] The drive unit can be suspended from the support structure, for example, so that the drive unit partially protrudes into the recess and partially protrudes beyond the recess on one or both sides. However, a vertical installation of the drive unit is also conceivable.

[0024] The recess with the housing or mounting flange that can be rotated relative to it can be thought of as a type of bayonet lock, enabling a quickly established and detachable positive connection between the support structure and the spindle drive. This, in turn, allows for easy insertion and removal of the spindle drive into the support structure without the need to disassemble other components of the car assembly or the double-deck elevator, such as the cars, support elements, or a yoke. This allows the spindle drive to be serviced and / or maintained with minimal effort, despite the rather limited space in the elevator shaft.

[0025] A second aspect of the invention relates to a double-decker elevator. The double-decker elevator comprises an elevator shaft and at least one car assembly, as described above and below, wherein the car frame of the car assembly(s) is arranged displaceably in the elevator shaft in its longitudinal direction. Such a double-decker elevator is particularly easy to maintain and / or service due to the simplified assembly and disassembly of the spindle drive.

[0026] A third aspect of the invention relates to a method for mounting a spindle drive in a lift car arrangement, as described above and below. The method comprises at least the following steps, which can be carried out, for example, in the order given below: (i) arranging the spindle drive opposite the recess in the support structure of the car frame, wherein the housing of the spindle drive is positioned in the first position opposite the recess such that the fastening flange of the housing clears the recess; (ii) guiding the spindle drive through the recess in the direction of the vertical axis; (iii) rotating the housing into the second position such that the fastening flange protrudes beyond the outer edge of the recess; and (iv) fastening the housing to the support structure via the fastening flange.

[0027] In step (ii), the fastening flange can, for example, be moved from a position below the recess to a position above the recess.

[0028] In an additional step, the spindle can be mechanically coupled to the first car, for example, by attaching a spindle nut mounted on the spindle to the first car, such as its floor frame. This step can be performed before or after step (iv), but after step (ii).

[0029] A corresponding method for removing the spindle drive from the car assembly may, for example, comprise the following steps: (v) detaching the housing from the support structure; (vi) rotating the housing back to the first position; (vii) passing the spindle drive through the recess in the direction of the vertical axis to remove the spindle drive.

[0030] The passage of the spindle drive in step (vii) may be in a direction opposite to the direction in step (ii).

[0031] In this way, the assembly and disassembly of the spindle drive can be made significantly easier than with conventional methods.

[0032] Features of the method can also be understood as features of the car arrangement described above and below and vice versa.

[0033] Without limiting the scope of the invention in any way, embodiments of the invention may be considered to be based on the ideas and findings described below.

[0034] According to one embodiment, the support structure can form a floor of the car frame. In other words, the first and second cars can be arranged above the floor, i.e., the support structure, in the car frame when the double-decker elevator is in operation. This makes it possible to insert the spindle drive into the support structure from below.

[0035] According to one embodiment, the first car can be arranged below the second car when the double-decker elevator is in operation. This improves accessibility to the first car and / or the spindle drive coupled thereto from below the car assembly in the elevator shaft, for example, for maintenance and / or repair purposes.

[0036] According to one embodiment, the mounting flange can protrude beyond the outer edge of the recess in the second position on opposite sides of the recess. Thus, the mounting flange can be supported on both sides of the support structure. This improves the support of the spindle drive on the support structure.

[0037] According to one embodiment, the mounting flange can be attached to the support structure via a damping element. The damping element can be arranged at least partially between the mounting flange and the support structure. In addition, the damping element can at least partially surround the housing. The damping element can be made at least partially from a particularly vibration-damping material, such as an elastomer or another suitable plastic, such as polyurethane. Thus, the transmission of undesirable vibrations between the support structure and the spindle drive during operation of the double-deck elevator can be avoided or significantly reduced.

[0038] According to one embodiment, the mounting flange and the damping element can be screwed together. Additionally or alternatively, the damping element and the support structure can be screwed together. This further simplifies the assembly and disassembly of the spindle drive.

[0039] According to one embodiment, the damping element can be divided into at least two individual parts that can be assembled and / or disassembled separately. If the damping element is implemented as a stack of layers consisting of several layers (see below), the damping element can be divided into individual parts, for example, transversely to the stacking direction of the layer stack. This simplifies the assembly and disassembly of the damping element. For example, it can thus be avoided that other components of the elevator car assembly must be disassembled for the assembly and disassembly of the damping element.

[0040] According to one embodiment, the damping element can be constructed from at least two layers lying one above the other. The layers can differ in their materials. In other words, the damping element can be realized as a layer stack of several layers stacked on top of one another in a stacking direction. The layers can be connected to one another in a suitable manner, i.e., force-fitting, form-fitting and / or material-fitting manner. For example, one of the layers can be a carrier layer made of a relatively strong material such as metal and the other layer a damping layer made of a relatively vibration-damping material such as plastic. In this way, the vibration-damping properties of the damping element can be specifically adapted without compromising its strength.

[0041] According to one embodiment, the damping element can be constructed from two outer layers and at least one intermediate layer arranged between the two outer layers. The intermediate layer can be made of a different material than the outer layers. For example, each outer layer can be made of a relatively strong material, such as metal, whereas the intermediate layer can be made of a relatively vibration-damping material, such as plastic. Thus, the intermediate layer can be stabilized on both sides and / or protected from mechanical damage. For example, when the spindle drive is mounted, the outer layers can protect the intermediate layer from direct contact with the mounting flange and / or the support structure.

[0042] According to one embodiment, the intermediate layer can be a plastic layer, such as an elastomer or polyurethane layer. Additionally or alternatively, the outer layers can be metal layers. This enables a particularly low-maintenance damping element that can also be provided relatively cost-effectively.

[0043] According to one embodiment, the first car can be displaced along the car frame in the direction of the vertical axis by means of two spindle drives. Each spindle drive can comprise a spindle mechanically coupled to the first car and a drive unit for driving the spindle. The spindle drives can be guided through different recesses in the support structure. Each drive unit can have a housing with a fastening flange that can be positioned in the first position and the second position opposite the respective recess. The two spindle drives can, for example, be of identical construction and / or can be (dis)assembled in the same or a similar manner, as described above and below using the example of the (individual) spindle drive. It is possible for the spindle drives to be mounted diagonally opposite one another on the car frame.This allows the car to be reliably adjusted vertically even under heavy loads. Furthermore, the use of two spindle drives reduces the risk of the car becoming jammed while moving along the car frame.

[0044] It is possible for the second car to be displaceable along the car frame in the direction of the vertical axis by means of one or more spindle drives. The spindle drive(s) can be designed in a similar way to the spindle drive of the first car.

[0045] For example, it is conceivable that the first and second car can be moved along the car frame using the same spindle drive(s). This allows the cars to be moved simultaneously without changing the vertical distance between them.

[0046] Alternatively, the first and second car can be moved along the car frame using different spindle drives. This allows the cars to be moved independently of each other.

[0047] According to one embodiment, the second car can be fixed in the car frame along the vertical axis. Since only one of the cars is movable, the dead weight of the car assembly can be kept low. Furthermore, manufacturing and assembly costs can be reduced.

[0048] According to one embodiment, the housing can be attached to the support structure in the second position via the mounting flange. This ensures that the housing does not slip vertically during operation of the double-decker elevator, even if the screw connection of the mounting flange should become loose for unforeseen reasons.

[0049] Advantageous embodiments of the invention are explained in more detail below with reference to the accompanying drawings, wherein neither the drawings nor the explanations are to be interpreted as limiting the invention in any way.

[0050] Fig. 1 shows a double-deck elevator according to an embodiment of the invention.

[0051] Fig. 2 shows a plan view of a section of a support structure of a car arrangement according to an embodiment of the invention during the (dis)assembly of a spindle drive.

[0052] Fig. 3 shows a top view of the section of the support structure with the spindle drive mounted.

[0053] Fig. 4 shows a cross-sectional view of the support structure from Fig. 3 along a section line IV-IV.

[0054] The figures are merely schematic and not to scale. The same reference numerals designate the same or equivalent features in the various drawings.

[0055] Fig. 1 shows a double-decker elevator 1 in an operational state. The double-decker elevator 1 comprises a car assembly 2 consisting of a first car 3, a second car 4, and a car frame 5.

[0056] Vertically extending guide rails 7 can be anchored in a lift shaft 6 of the double-decker lift 1, between which the lift car frame 5 can be mounted so as to be displaceable in the direction of a vertical axis z, hereinafter referred to as the z-direction, ie in the longitudinal direction of the lift shaft 6.

[0057] The two elevator cars 3, 4 are arranged one above the other in the car frame 5. In this example, the first elevator car 3 is located below the second elevator car 4. However, a reversed arrangement of the two elevator cars 3, 4 in the car frame 5 is also possible.

[0058] By moving the car frame 5 in the elevator shaft 6 along the guide rails 7, the two cars 3, 4 can be moved together and thus stop simultaneously at two adjacent floors, i.e. floors directly above one another.

[0059] Floor heights can vary within a building. For example, the vertical distance between two adjacent floors may decrease with increasing height of a building, which can be particularly the case in high-rise buildings. Therefore, the vertical distance between the two elevator cars 3, 4 within the elevator car frame 5 should be adjustable accordingly.

[0060] For this purpose, at least one of the cars 3, 4, here for example the first, lower car 3, is mounted in the car frame 5 so that it can be moved in the z-direction.

[0061] The second car 4, however, can be firmly connected to the car frame 5, i.e. fixed to the car frame 5 in the z-direction.

[0062] The vertical adjustment of the first car 3 can be carried out, for example, by means of two (identical) spindle drives 8, each comprising a spindle 9 and a drive unit 10 for driving, ie motor-rotating, the spindle 9.

[0063] Each drive unit 10 comprises a housing 11 in which, for example, an electric drive motor and optionally a gear coupling the drive motor to the respective spindle 9 can be arranged.

[0064] Each spindle drive 8 is guided through a specially provided recess 12 in a support structure 13 of the car frame 5.

[0065] In this example, the support structure 13 forms a floor 14 of the car frame 5, i.e., both cars 3, 4 are located above the support structure 13. Thus, the first car 3 is mounted so as to be displaceable in the z-direction in a longitudinal section of the car frame 5 located between the support structure 13 and the second car 4.

[0066] Furthermore, the spindles 9 can each be guided through a floor frame 15 of the first car 3. For example, a spindle nut (not shown) can be mounted on each spindle 9 and secured to and / or in the floor frame 15.

[0067] Each housing 11 also has a fastening flange 16, via which the housing 11, and thus the respective spindle drive 8, is fastened to the support structure 13.

[0068] For example, the housings 11 can be mounted in a hanging manner in the respective recess 12, wherein the fastening flanges 16 can rest on an upper side of the support structure 13 facing the floor frame 15.

[0069] As in Fig. 1 As can be seen, the spindle 9 and the drive unit 10 of the same spindle drive 8 can have a common longitudinal axis, whereby the spindle 9 can extend from the drive unit 10 in the z-direction upwards to the first car 3. At its free end, the spindle 9 can be rotatably mounted in a corresponding spindle bearing of the car frame 5.

[0070] By rotating the spindle 9 in the respective spindle nut (not shown) by means of the respective drive unit 10, depending on the direction of rotation, a vertical distance between the support structure 13 and the floor frame 15 is either shortened or lengthened, ie the first car 3 is either moved towards or away from the second car 4 (which is fixed in the car frame 5).

[0071] In order to simplify the assembly and disassembly of the spindle drives 8, for example for maintenance or repair purposes, each fastening flange 16 can be aligned in two different positions relative to the respective recess 12 by appropriately rotating the respective housing 11 about its longitudinal axis.

[0072] Fig. 2 shows a (dis)assembly position of the mounting flange 16, in which the mounting flange 16 can be guided unhindered in the z-direction through the recess 12. The recess 12 is large enough so that in the (dis)assembly position, not only the mounting flange 16, but also the remaining spindle drive 8, i.e. the spindle 9 and the drive unit 10 with its housing 11, can be guided through the recess 12 in the z-direction.

[0073] Fig. 3 shows a fastening position of the fastening flange 16, into which the fastening flange 16 can be brought, for example, by the Fig. 3 not shown housing 11, to which the fastening flange 16 is attached, is rotated about its longitudinal axis by 90 degrees starting from the (dis)assembly position.

[0074] In the fastening position, the fastening flange 16 partially projects beyond an outer edge 17 of the recess 12. This prevents the spindle drive 8 from rotating in the z-direction - in the Fig. 3 shown view away from the viewer - can be passed through the recess 12.

[0075] For example, the mounting flange 16 can protrude beyond the outer edge 17 on both sides, which improves the support of the spindle drive 8 on the support structure 13.

[0076] The mounting flange 16 can be attached to the support structure 13 directly or optionally via a vibration-damping damping element 18. The damping element 18 can be arranged between the mounting flange 16 and the support structure 13, as shown in Fig. 4 visible.

[0077] For example, the fastening flange 16 can be screwed to the damping element 18 with a plurality of screws 19, while the damping element 18 can in turn be screwed to the support structure 13 with a plurality of screws 19.

[0078] It is possible for the damping element 18 to be composed of two or more individual parts 20. The individual parts 20 can be disassembled or assembled separately from one another. For example, the individual parts 20 can at least partially enclose the drive unit 10 and / or the housing 11 in the assembled state.

[0079] As in Fig. 4As shown, the damping element 18 can be constructed from several superimposed layers 21, 22 of different materials, here from two stabilizing, metallic outer layers 21 and a vibration-damping plastic layer lying between the two outer layers 21 as an intermediate layer 22. One of the outer layers 21 can rest on the fastening flange 16 and the other outer layer 21 on the support structure 13.

[0080] A method for mounting a spindle drive 8 in the car arrangement 2 is described below by way of example.

[0081] First, the spindle drive 8 is arranged opposite the recess 12 in such a way that the housing 11 with its fastening flange 16 is aligned opposite the recess 12 in the (dis)assembly position.

[0082] The spindle drive 8 can then be lifted in the z-direction using a suitable lifting device, such as a crane, and guided from below through the recess 12 until the fastening flange 16 lies above the recess 12.

[0083] Next, the housing 11 is rotated into the fastening position.

[0084] Now the individual parts 20 of the damping element 18 are positioned on the support structure 13 and screwed to it, but without fully tightening the relevant screws 19.

[0085] The spindle drive 8 is then lowered again until the fastening flange 16 rests flat on the damping element 18.

[0086] Then the fastening flange 16 is screwed to the damping element 18, but without fully tightening the relevant screws 19.

[0087] The spindle drive 8 can now be aligned.

[0088] Only after the spindle drive 8 has been correctly aligned are the screws 19 fully tightened.

[0089] The spindle drive 8 can be disassembled in the reverse order.

[0090] Finally, it should be noted that terms such as "having," "comprising," etc., do not exclude other elements or steps, and indefinite articles such as "a" or "an" do not exclude a plurality. Furthermore, it should be noted that features or steps described with reference to one of the above embodiments may also be used in combination with features or steps described with reference to other of the above embodiments. Reference signs in the claims are not to be considered as limitations.

Claims

1. A car arrangement for a double-decker elevator (1), the car arrangement (2) comprising: a first car (3); a second car (4); and a car frame (5), which is arranged in an elevator shaft (6) of the double-decker elevator (1) so as to be displaceable in the longitudinal direction of the elevator shaft (6); wherein the first car (3) and the second car (4) are arranged one above the other in the car frame (5) in an operational state of the double-decker elevator (1); wherein at least the first car (3) can be displaced along the car frame (5) in the direction of a vertical axis (z) by means of a spindle drive (8); wherein the spindle drive (8) comprises a spindle (9), which is mechanically coupled to the first car (3), and a drive unit (10) for driving the spindle (9); characterized in that the spindle drive (8) is guided through a cutout (12) in a support structure (13) of the car frame (5), and the drive unit (10) has a housing (11) with a fastening flange (16), via which the housing (11) is fastened to the support structure (13); wherein the housing (11) can be positioned in a first position and a second position in relation to the cutout (12); wherein the fastening flange (16) exposes the cutout (12) in the first position, so that the spindle drive (8) can be guided through the cutout (12) in the direction of the vertical axis (z), and projects beyond an outer edge (17) of the cutout (12) in the second position.

2. The car arrangement according to claim 1, wherein the support structure (13) forms a floor (14) of the car frame (5).

3. The car arrangement according to any of the preceding claims, wherein the first car (3) is arranged below the second car (4).

4. The car arrangement according to any of the preceding claims, wherein the fastening flange (16) projects beyond the outer edge (17) of the cutout (12) on mutually opposite sides of the cutout (12) in the second position.

5. The car arrangement according to any of the preceding claims, wherein the fastening flange (16) is fastened to the support structure (13) by a damping element (18).

6. The car arrangement according to claim 5, wherein the fastening flange (16) and the damping element (18) are screwed together; and / or wherein the damping element (18) and the support structure (13) are screwed together.

7. The car arrangement according to claim 5 or 6, wherein the damping element (18) is divided into at least two individual parts (20) that can be mounted and / or dismounted separately from one another.

8. The car arrangement according to any of claims 5 to 7, wherein the damping element (18) is constructed from at least two layers (21, 22) lying one above the other, wherein the layers (21, 22) differ from one another in their materials.

9. The car arrangement according to claim 8, wherein the damping element (18) is constructed from two outer layers (21) and at least one intermediate layer (22) arranged between the two outer layers (21), wherein the material of the intermediate layer (22) differs from that of the outer layers (21).

10. The car arrangement according to claim 9, wherein the intermediate layer (22) is a plastics layer; and / or wherein the outer layers (21) are metal layers.

11. The car arrangement according to any of the preceding claims, wherein the first car (3) can be displaced along the car frame (5) in the direction of the vertical axis (z) by means of two spindle drives (8); wherein each spindle drive (8) comprises a spindle (9), which is mechanically coupled to the first car (3), and a drive unit (10) for driving the spindle (9); wherein the spindle drives (8) are guided through different cutouts (12) in the support structure (13) and each drive unit (10) has a housing (11) that has a fastening flange (16) and can be positioned in the first position and the second position in relation to the corresponding cutout (12).

12. The car arrangement according to any of the preceding claims, wherein the second car (4) is fixed in the car frame (5) in the direction of the vertical axis (z).

13. The car arrangement according to any of the preceding claims, wherein the housing (11) is fastened to the support structure (13) in the second position by the fastening flange (16).

14. A double-decker elevator, comprising: an elevator shaft (6); and at least one car arrangement (2) according to any of the preceding claims, wherein the car frame (5) of the car arrangement (2) is arranged in the elevator shaft (6) so as to be displaceable in the longitudinal direction thereof.

15. A method for mounting a spindle drive in a car arrangement according to any of claims 1 to 13, the method comprising: arranging the spindle drive (8) in relation to the cutout (12) in the support structure (13) of the car frame (5), wherein the housing (11) of the spindle drive (8) is positioned in the first position in relation to the cutout (12) so that the fastening flange (16) of the housing (11) exposes the cutout (12); guiding the spindle drive (8) through the cutout (12) in the direction of the vertical axis (z); rotating the housing (11) into the second position so that the fastening flange (16) projects beyond the outer edge (17) of the cutout (12); and fastening the housing (11) to the support structure (13) by the fastening flange (16).