Cantilever

Abstract

A cantilever (1) for fastening a code carrier (10), spanning the conveying height of a car (13), to an elevator rail with a rail foot (12) comprises a support arm (20) and a first clip (21) and a second clip (22). The support arm (20) has a fastening possibility for attachment of the code carrier (10). The first clip (21) and the second clip (22) are arranged on the support arm (20) in order to fasten the cantilever (1) to the rail foot (12). The elevator rail (11) can be arranged between the first clip (21) and the second clip (22). The cantilever (1) also has a first stop (23) and a second stop (24) in order to bear against the rail foot (12) and the elevator rail (11) can be arranged between the first stop (23) and the second stop (24).

Description

[0001] 2024P00250WÖ

[0002] - 1 - Boom

[0003] The present invention relates to a boom for attaching a code carrier stretched over the conveying height of a cabin to an elevator rail with a rail foot, a boom set comprising the boom and a method for attaching a code carrier stretched over the conveying height of a cabin to an elevator rail with a rail foot.

[0004] In an elevator, a cabin typically travels vertically along a track between different floors or levels within a building. To determine the cabin's position within the shaft, the elevator has a shaft information system. This system can determine the cabin's position either continuously (for example, with a resolution of 0.1 mm) or discretely. A discrete position is characterized by the fact that the control system only receives information about the cabin's position between two points, which may be several meters apart, without determining its precise location.

[0005] Shaft information systems often function using a code carrier, which is suspended in the shaft, for example, in the form of a strip. A reader, typically located at the cabin, reads the code carrier and can determine the cabin's position in the shaft using the data read from the code carrier.

[0006] Patent EP 0792 833 1 discloses a device for generating shaft information. A steel belt stretched over the entire conveying height serves as a carrier for magnets that mark specific travel areas, such as an entry area on a floor. Several tracks for arranging the magnets are provided on the steel belt. A reading device with a magnetic switch, mounted on the cabin, moves relative to the steel belt as the cabin travels.

[0007] A device for generating shaft information is known from US 4750592, US 2003 / 0070883, or DE 4401 977, in which a code carrier, for example a tape, is stretched across the shaft height. Code strips, for example reflectors or magnets, are attached to each broad side of the tape. As the cabin moves, the tape slides through a housing with sensors attached to the cabin.

[0008] - 2 -

[0009] Reading the code strips. The belt is attached to a boom. Attaching and aligning these booms to the elevator track can be difficult. The mounting clips often can only be attached once the boom is already in place against the track. This requires the technician to hold the boom against the track with one hand, leaving only one hand free to insert the screws through the holes and clip. The screws can easily fall into the shaft. This is not only annoying but also a hazard for technicians working further down the shaft or for materials already installed or stored there. Furthermore, it can be difficult to align the boom horizontally or to adjust the correct distance between the belt and the track.

[0010] Therefore, one task can be seen as providing a device for holding a code carrier that is easy to install.

[0011] According to a first aspect of the invention, a boom for attaching a code carrier stretched over the travel height of a cabin solves the problem. The boom can be attached to an elevator rail with a rail foot. The boom comprises:

[0012] A support arm that has a mounting option for attaching the code carrier, and

[0013] A first clip and a second clip, arranged on the support arm, to attach the boom to the rail base,

[0014] The elevator rail can be positioned between the first and second clips. The boom also has a first stop and a second stop to rest against the rail base, and the elevator rail can be positioned between the first and second stops.

[0015] According to a second aspect of the invention, a boom set solves the problem. The boom set comprises a boom according to the first aspect of the invention and a code carrier. The code carrier serves as a measuring tape for a position measuring device attached to a cabin.

[0016] According to a third aspect of the invention, a method for attaching a code carrier stretched across the travel height of a cabin on an elevator rail with a rail foot solves the problem. The method comprises the following steps: 2024P00250WÖ

[0017] - 3 - Arranging a cantilever according to the first aspect of the invention on the rail foot of an elevator rail, wherein the first stop and the second stop are firmly connected to the support arm, but the screws of the first clip and the second clip are still loosely arranged.

[0018] Attaching the first and second clips to the support arm.

[0019] The boom, boom set, and installation method solve the problem by allowing the boom to be easily attached to the elevator rail using the stop and the second stop – for example, with one hand. Even without the clips, the boom holds securely enough that it no longer needs to be held by hand. This leaves the installer with both hands free to tighten the clips. Furthermore, the boom is always perfectly horizontal on the vertical elevator rail. The stops also keep the boom securely in a horizontal position, even when the code carrier is heavy. This allows the boom to hold significantly heavier code carriers than would be possible without the stops, even with two or four clips.

[0020] Possible features and advantages of embodiments of the invention can be considered, among other things and without limiting the invention, as being based on the ideas and findings described below.

[0021] The elevator track serves as a guide for the elevator car's guide element. The track may have a head that directly guides the car. This head may be ground. The track also has a foot. The foot increases the track's rigidity and is typically used to secure the track to a shaft, specifically to brackets within the shaft, using mounting clamps. The foot is wider than the head. Within a tolerance range, the foot has a uniform width. This width can be the same for all track elements of the same type.

[0022] The first and second stops are positioned on the boom such that the second stop is located higher than the first and rests on the side of the rail foot opposite the first stop. This allows a torque generated by the weight of the boom to be compensated by a force couple acting on both the first and second stops. These forces, in addition to a 2024P00250WÖ

[0023] - 4 - In addition to the component normal to the surface of the rail foot, there is also a friction component. This friction component can be sufficiently large due to the rough surface of the rail foot, so that downward slippage of the cantilever is prevented.

[0024] The first and second stops are spaced apart by a distance determined by the width of the rail base and the vertical offset (i.e., the height difference) between them. These dimensions form a right triangle, and the Pythagorean theorem applies to the lengths of this triangle. The first and second stops can each be attached to a round hole in the support arm, the distance between which thus determines the distance between the stops.

[0025] The clips serve to hold the support arm to the elevator track. They secure the support arm against tipping away from the track. Preferably, the clips only bear a small portion of the frictional forces that hold the support arm at the installed height. The clips essentially only exert a normal force on the track foot, a force that acts essentially perpendicular to one of the track's edges.

[0026] According to a preferred embodiment, a connecting line passing through the first and second stops forms an angle of 10° to 80° with the extension direction of the support arm. The angle allows the forces that the stops must exert to hold the boom to be adjusted. The larger the angle, the smaller the forces required at the stops. Thus, it may be possible to design the support arm to be thinner by simultaneously increasing the angle. Very small angles allow for a low boom height, but these can lead to higher forces at the stops. Preferably, the angle lies between 30° and 60°, with 40° having proven to be optimal.

[0027] Preferably, the second stop is positioned further away from the mounting point for attaching the code carrier than the first stop. Furthermore, the first stop is positioned higher than the second. This causes the arm to wedge itself against the elevator rail, providing sufficient immediate security to allow further installation steps to be carried out without having to hold the arm in place. The arm can thus be held securely enough on the rail even without the clips that it can be released without falling. This allows the installer to use both hands to attach the clips. 2024P00250WÖ

[0028] - 5 -

[0029] According to a preferred embodiment, the first and / or the second stop are slidably arranged on the support arm to allow it to move along the support arm in its direction of extension. This slidability can be achieved, for example, by providing elongated holes on the support arm. This allows the stops to be easily adapted to rail types with different rail foot widths. In this embodiment, the stops are preferably very securely attached to the support arm. If the stops were to move along the elongated holes during operation, this would change the distance between the stops. As a result, the support arm would rotate downwards, and the cabin positions measured at the code carrier would no longer be accurate.

[0030] According to a preferred embodiment, the cantilever has a tension element that sets the distance between the first and second stops to a predetermined distance. This is particularly advantageous in combination with the stops that are slidably mounted on the support arm. The use of the tension element ensures a constant distance between the two stops, as determined by the tension element. Furthermore, both stops can be moved together along the support arm, for example, to adjust the position of the code carrier in the shaft. This allows for easy adjustment of the distance between the code carrier and the elevator rail. The tension element can be designed as a stamped sheet metal component. However, it is also possible, for example, to design the tension element as a wire or rope loop.

[0031] According to a preferred embodiment, the tensioning element has a first round hole for receiving the first stop and a second round hole for receiving the second stop. Preferably, the tensioning element is designed as a flat element, for example, as a sheet metal part. The two round holes ensure the distance between the first and second stops. This allows the unit consisting of the two stops and the connecting element to be easily moved along the elongated holes of the support arm when the fasteners are loosened. The distance between the stops remains unchanged. By tightening the fasteners, the distance between the elevator rail and the code carrier can then also be ensured.

[0032] According to a preferred embodiment, the pulling element has at least one third round hole to allow the pulling element to be adjusted by selecting the round holes of the pulling element. 2024P00250WÖ

[0033] - 6 - different widths of rail feet can be adapted. This allows the cantilever to be used for various rail types. For example, a combination of the first and second round holes might be suitable for use on a T89 type elevator rail, while the combination of the first and third round holes is suitable for use on a T127 type elevator rail. This allows the same components to be used in a wide variety of elevator systems.

[0034] According to a preferred embodiment, the support arm has a first elongated hole and a second elongated hole, wherein the first and the second elongated holes are aligned parallel to each other, and

[0035] the first stop is attached through the first round hole and the first elongated hole on the support arm, and

[0036] the second stop is attached through the second round hole and the second elongated hole on the support arm.

[0037] Alternatively, the second oblong hole can be used for the second stop instead of the second round hole.

[0038] According to a preferred embodiment, the first stop and / or the second stop comprises a head portion and a threaded portion, wherein the head portion is suitable for bearing against the rail foot, and the threaded portion serves to fasten the stop to the support arm. Preferably, the stop is designed as a socket head cap screw with internal drive, for example according to ISO 4762. The socket head corresponds to the head portion of the screw, and the threaded portion corresponds to the thread, which is preferably designed without a shank extending to the socket head.

[0039] The clips preferably consist of a clamping plate with a hole, a screw, and a nut. Washers are also preferably included. After the arm is positioned on the elevator rail using the two stops, the clips can be assembled on the arm. A washer is placed on a screw, which is then inserted through an opening in the support arm. From the other side, the clamping plate, another washer, and a nut are placed onto the clamping plate.

[0040] According to one embodiment, the first clip and / or the second clip are arranged in an elongated hole in the support arm. This has the advantage that the clips are already pre-mounted on the support arm.

[0041] - 7 -can be attached. To position the support arm on the elevator rail, the clips can be pushed into an outer position along the elongated hole or both elongated holes. Before tightening, the clips can then be slid onto the rail foot.

[0042] According to a preferred embodiment, the first clip is arranged as a mirror image of the second clip, with a plane of symmetry such that the plane of symmetry symmetrically divides the elevator rail and the first and second clips are arranged symmetrically with respect to the plane of symmetry. This allows, for example, both clips to be arranged in the same slot.

[0043] According to an alternative embodiment, the first clip is arranged essentially as a mirror image of the second stop, with a plane of symmetry existing such that the plane of symmetry separates the elevator rail symmetrically and the first clip and the second stop are arranged symmetrically with respect to the plane of symmetry and / or

[0044] that the second clip is arranged essentially as a mirror image to the first stop, with a plane of symmetry existing such that the plane of symmetry separates the elevator rail symmetrically and the second clip and the first stop are arranged symmetrically to the plane of symmetry.

[0045] This allows for a lower profile design of the boom. The symmetry here simply means that the respective stop and its corresponding clip are positioned at the same height. In particular, the respective clip and stop can, for example, be located in the same slot.

[0046] The procedure may further include the following step:

[0047] - Adjusting the distance between the code carrier and the elevator rail by positioning the first and second stops before arranging the boom on the rail foot.

[0048] This can be achieved by arranging the first stop and the second stop in a specific pair of round holes.

[0049] The procedure may further include the step

[0050] - Adjusting the boom to the width of a rail foot by positioning the 2024P00250WÖ

[0051] - 8 -first and second stop before arranging the boom on the rail foot.

[0052] This allows the stops to be adjusted to the width of the rail base. This step is preferably performed using the pull element. The pull element then ensures the correct distance for the width of the rail base. The two stops and the pull element can then be moved together to adjust the distance between the code carrier and the elevator rail.

[0053] Further advantages, features, and details of the invention will become apparent from the following description of exemplary embodiments and from the drawings, in which identical or functionally equivalent elements are provided with identical reference numerals. These show:

[0054] Fig. 1 A schematic section of an elevator with a boom,

[0055] Fig. 2a and Fig. 2b show a front view and a rear view of the boom,

[0056] Fig. 3 the connecting element,

[0057] Fig. 4 shows a detailed view of the boom,

[0058] Fig. 5 is an isometric view of the front of the boom on a rail,

[0059] Fig. 6 is an isometric view of the back of the boom on a rail.

[0060] Fig. 1 schematically shows a boom 1 installed in an elevator. The elevator has a cabin 13 that can be moved vertically along an elevator rail 11. To determine the position of the cabin 13 within the shaft, particularly during travel, the elevator has a position measuring device 14 on the cabin 13. This position measuring device evaluates a code carrier 10. The code carrier 10 carries a code that can be read by the position measuring device 14 and allows conclusions to be drawn about the position of the cabin 13 within the shaft. The boom 1 serves to attach the code carrier 10 to the elevator rail 11. The boom 1 consists mainly of a support arm 20. The support arm 20 has a code carrier receptacle 102 to which the code carrier 10 is attached.For this purpose, the code carrier 10 is looped through the code carrier receptacle 102 and secured to the support arm with a code carrier clamp 101 so that the code carrier 10 is held securely.

[0061] The support arm 20 is attached to the elevator rail 11 by means of a first stop 23, a second stop 24, a first clip 21 and a second clip 22. The 2024P00250WÖ

[0062] - 9 - Clips 21 and 22 are initially only loosely connected to the support arm 20. The support arm 20 is then positioned on the elevator rail 11 so that the first stop 23 and the second stop 24 abut a rail foot 12 of the elevator rail 11. Since the second stop 24, which is further away from the code carrier receptacle 102, is positioned higher than the first stop 23, the support arm 1 wedges itself against the elevator rail and is thus held securely enough to allow further installation steps to be carried out without having to hold the support arm 1 in place.

[0063] A predetermined distance 1004 between the elevator rail 11 and the code carrier 10 is determined by the position of the position measuring device 14 on the cabin 13.

[0064] Furthermore, the elevator rail 11 has a plane of symmetry 1003. Fig. 1 shows an embodiment of the cantilever 1 in which the first clip 21 is arranged essentially as a mirror image of the second stop 24, wherein the plane of symmetry 1003 exists, such that the plane of symmetry 1003 separates the elevator rail 11 symmetrically and the first clip 21 and the second stop 24 are arranged symmetrically with respect to the plane of symmetry 1003.

[0065] that the second clip 22 is arranged essentially in a mirror image to the first stop 23, with a plane of symmetry 1003 existing, such that the plane of symmetry 1003 separates the elevator rail 11 symmetrically and the second clip 22 and the first stop 23 are arranged symmetrically to the plane of symmetry 1003.

[0066] Figures 2a and 2b show a boom 1, similar to the boom in Fig. 1, in a more detailed view. Figure 2a shows a front view of the boom 1 corresponding to that shown in Fig. 1.

[0067] Figure 2 shows the back of the boom 1, as if the view of Fig. 2a had been rotated downwards along a horizontal axis in the plane of the paper.

[0068] To adapt to the specified distance (as shown in Fig. 1), the support arm has several sets of code carrier receptacles 102. In a left area, the receiver 20 shows two sets with three openings each, all of which can serve as code carrier receptacles 102.

[0069] To further adjust this predetermined distance (as shown in Fig. 1), the stops 23 and 24 and the clips 21 and 22 can be moved along a first elongated hole 51, a second elongated hole 52, a third elongated hole 53 and a fourth elongated hole 54.

[0070] - 10 - will be. Preferably, the two stops 23 and 24 are correctly adjusted and tightened along the elongated holes 51 and 52 before the arm 1 is attached to the elevator rail. The clips 21 and 22 are only loosely attached to the support arm 20 before it is attached to the elevator rail 11. Then the arm 1 can be attached to the elevator rail 11 so that the two stops 23 and 24 rest against the rail foot. Because a connecting line 1001, which runs through the first stop 23 and through the second stop 24, forms an angle of 10 to 80° with a direction of extension 1002 of the support arm 20, the first stop 23 and the second stop 24 clamp the rail foot of the elevator rail 11 between them, and the support arm is held in place by itself.

[0071] This allows a technician to release both hands from the support arm, for example to grip a wrench and tighten the nuts 32 of clips 21 and 22. After tightening the clips, the boom 1 is securely attached to the rail.

[0072] The tension element 25 prevents the distance between the first stop 23 and the second stop 24 from changing. This ensures that the angle between the connecting line 1001 and the extension direction 1002 of the support arm 20 cannot change, and thus also ensures that the extension direction 1002 of the support arm 20 is horizontal, i.e., at a 90° angle to the rail. Further details regarding the selection of the distance between the first stop 23 and the second stop 24 are explained in Fig. 3.

[0073] Figures 2a and 2b show a symmetry that differs from that shown in Figure 1. Figures 2a and 2b show that a plane of symmetry 1003 exists, such that the plane of symmetry 1003 separates the elevator rail symmetrically and the first clip 21 and the second clip 22 are arranged symmetrically with respect to the plane of symmetry 1003.

[0074] Fig. 3 shows a tension element 25. The tension element 25 has at least one first round hole 41 and one second round hole 42. The distance between the first round hole 41 and the second round hole 42, together with the width of the rail foot, determines the angle of the support arm. The threaded portion of one of the first or the second stop can be guided through the round holes 41 and 42 or 41 and 43. A specific correct distance, i.e., a correct pairing of the round holes, must be selected to ensure that the support arm 20 is horizontally aligned. 2024P00250WÖ

[0075] - 11 - For elevator rails with a different rail foot width, a different spacing must also be selected. Therefore, the pull element 25 can have a third round hole 43, which is spaced differently from the first round hole 41 than from the second round hole 42. This allows the cantilever to be adapted to different elevator rails by selecting the correct pairing of round holes 41, 42, and 43.

[0076] Fig. 4 shows the rear of the boom from Fig. 2b, but now without the stops and the tensioning element. The four elongated holes 51, 52, 53, and 54 are thus clearly visible. The dashed outline indicates where the connecting element 25 would be attached. The nuts 32 serve to initially hold the clips 21 and 22 on the opposite side of the support arm 20 loosely, and then securely after tightening.

[0077] Figures 5 and 6 show the boom, as introduced in Figures 2a and 2b, attached to an elevator rail 11. Figure 5 shows a front view, as seen, for example, from a cabin roof. Figure 6 shows the back view. The first clip 21 and the second clip 22 hold the boom 1 to the elevator rail 11. A plane of symmetry exists, such that the plane of symmetry divides the elevator rail symmetrically, and the first clip 21 and the second clip 22 are arranged symmetrically with respect to the plane of symmetry.

[0078] The first stop 23 and the second stop 24 are designed as cylinder head screws, each having a head 30 that rests against the rail foot 12, and a threaded part 31 that passes through one of the elongated holes 51, 52, 53 or 54 and through one of the round holes 41, 42 or 43 (see Figure 3). Both the screws of the clips and the threaded parts 31 of the stops are fastened on the back by nuts 32.

[0079] The support arm 20 further features several code carrier receptacles 102. The code carrier is not shown.

[0080] Finally, it should be noted that terms such as "comprising," "encompassing," etc., do not exclude other elements or steps, and terms 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 other features or steps from other embodiments described above. Reference numerals in the claims are not to be considered as a limitation.

Claims

2024P00250WÖ - 12 - Patent claims 1. Boom (1) for attaching a code carrier (10) spanned over the conveying height of a cabin (13) to a lift rail with a rail foot (12), wherein the boom (1) comprises: A support arm (20) which has a fastening option for attaching the code carrier (10), and A first clip (21) and a second clip (22) arranged on the support arm (20) to attach the boom (1) to the rail foot (12), wherein the elevator rail (11) can be arranged between the first clip (21) and the second clip (22), characterized by the fact that the cantilever (1) further has a first stop (23) and a second stop (24) to rest against the rail foot (12) and the elevator rail (11) can be arranged between the first stop (23) and the second stop (24).

2. Cantilever (1) according to claim 1, characterized in that a connecting straight line (1001) passing through the first stop (23) and through the second stop (24) forms an angle of 10 to 80° with an extension direction (1002) of the support arm (20).

3. Boom (1) according to claim 1 or 2, characterized in that the first and / or the second stop (23, 24) are arranged slidably on the support arm (20) in order to move the latter along the extension direction (1002) along the support arm (20).

4. Boom (1) according to one of claims 1 to 3, characterized in that the boom (1) has a tension element (25) which sets a distance between the first stop (23) and the second stop (24) to a predetermined distance.

5. Boom (1) according to claim 4, characterized in that the tension element (25) has a first round hole for receiving the first stop (23) and a second round hole for receiving the second stop (24). 2024P00250WÖ - 13 - 6. Cantilever (1) according to claim 5, characterized in that the tension element (25) has at least one third round hole in order to adapt the tension element (25) to different widths of rail feet by selecting the round holes of the tension element (25).

7. Boom (1) according to claim 6, characterized in that the support arm (20) has a first elongated hole (51) and a second elongated hole (52), wherein the first and the second elongated hole (51, 52) are aligned parallel to each other, and the first stop (23) is attached to the support arm (20) through the first round hole (41) and the first elongated hole (51), and the second stop (24) is attached to the support arm (20) through the second round hole (42) and the second elongated hole (52).

8. Cantilever (1) according to one of claims 1 to 7, characterized in that the first stop (23) and / or the second stop (24) comprises a head part (30) and a threaded part (31), wherein the head part (30) is suitable to rest against the rail foot (12) and the threaded part (31) serves to fasten the stop (23, 24) to the support arm (20).

9. Boom (1) according to one of claims 1 to 8, characterized in that the first clip (21) and / or the second clip (22) are arranged in an elongated hole (51, 52, 53, 54) of the support arm (20).

10. Boom (1) according to one of claims 1 to 9, characterized in that the first clip (21) is arranged in a mirror image to the second clip (22), wherein a plane of symmetry (1003) exists, such that the plane of symmetry (1003) separates the elevator rail (11) symmetrically and the first clip (21) and the second clip (22) are arranged symmetrically to the plane of symmetry (1003).

11. Boom (1) according to one of claims 1 to 9, characterized in that the first clip (21) is arranged essentially in a mirror image to the second stop (24), wherein a plane of symmetry (1003) exists, such that the plane of symmetry (1003) defines the 2024P00250WÖ - 14 - elevator rail (11) symmetrically separates and the first clip (21) and the second stop (24) are arranged symmetrically to the plane of symmetry (1003) and / or that the second clip (22) is arranged substantially as a mirror image to the first stop (23), wherein a plane of symmetry (1003) exists such that the plane of symmetry (1003) separates the elevator rail (11) symmetrically and the second clip (22) and the first stop (23) are arranged symmetrically to the plane of symmetry (1003).

12. Boom set characterized by the fact that the boom set a boom (1) according to one of claims 1 to 11 and a code carrier (10) which serves as a measuring tape for a position measuring device (14) attached to a cabin (13).

13. Method for attaching a code carrier (10) stretched over the conveying height of a cabin (13) to an elevator rail (11) with a rail foot (12), comprising the steps: Arranging a cantilever (1) according to one of claims 1 to 11 on the rail foot (12) of a lift rail (11), wherein the first stop (23) and the second stop (24) are firmly connected to the support arm (20), but the screws of the first clip (21) and the second clip (22) are still loosely arranged; Attaching the first and second clips (21, 22) to the support arm (20).

14. The method according to claim 13 further comprising the step: Adjusting the distance (1004) between the code carrier (10) and the elevator rail (11) by positioning the first and second stops (23, 24) before arranging the cantilever (1) on the rail foot (12).

15. The method according to claim 13 or 14 further comprising the step: Adapting the boom (1) to the width of a rail foot (12) by positioning the first and second stops (23, 24) before arranging the boom (1) on the rail foot (12).

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