EP4126735B1 - Universal bracket and pit assembly for a rail system of an elevator system, rail system and method for aligning the rail system - Google Patents

Description

The present invention relates to a universal bracket for a rail system of an elevator installation, a pit assembly for a rail system of an elevator installation, a rail system for an elevator installation and a method for aligning a rail system of an elevator installation in an elevator shaft for the elevator installation.

In an elevator system, at least one cabin is guided by a rail system during its vertical movement along an elevator shaft. The rail system comprises consoles that are attached to the walls of the elevator shaft for the elevator system. The consoles are sometimes also referred to as brackets. Vertically arranged rails of the rail system are attached to the consoles.

The brackets are attached to the walls during the construction phase of the elevator system and then the rails are aligned on the brackets using an alignment device. The alignment device can be, for example, a plumb line that is hung from the ceiling of the elevator shaft down to a pit in the elevator shaft. The rails can be aligned using templates or gauges that are held between the respective rail and a plumb line of the plumb line. The relative position of the rail to the respective bracket is readjusted until the template or gauge fits exactly between the plumb line and the rail.

WO 2016/066786 A1 describes a conventional method for installing guide rails. WO 2009156557 A1 shows a device for aligning a guide line by means of actuators attached to the device. JP-H10 218530 A , JP 2001 163549 A , JP H05 186161 A and JP H05 139656 A show devices that are temporarily installed in the shaft to hold or align a guide line

WO 2009/156557 A1 discloses a console according to the preamble of claim 1. EP 0 767 134 A2 discloses a pit assembly according to the preamble of claim 5.

There may be a need for, among other things, an improved universal bracket for an elevator rail system, an improved pit assembly for an elevator rail system, an improved rail system for an elevator system, and an improved method for aligning an elevator rail system into an elevator hoistway for the elevator system.

Such a need can be met by a universal bracket for a rail system of an elevator installation, a pit assembly for a rail system of an elevator installation, a rail system for an elevator installation and a method for aligning a rail system of an elevator installation in an elevator shaft for the elevator installation according to the independent claims. Advantageous embodiments are defined in the dependent claims and the following description.

According to a first aspect of the invention, a universal bracket for a rail system of an elevator system is proposed, wherein the universal bracket has a positionable and alignable main support and at least one mounting point for at least one rail of the rail system, wherein the main support has two guides inseparably connected to the main support for guiding a guide line each, wherein the mounting point and the guides are arranged in fixed relative positions to one another.

According to a second aspect of the invention, a pit assembly for a rail system of an elevator system is proposed, wherein the pit assembly has a floor support and a fastening support aligned transversely to the floor support, wherein the floor support has at least one mounting point for at least one rail of the rail system and the fastening support has two fastening points inseparably connected to the fastening support for fastening a guide line each, wherein the mounting point and the fastening points are arranged in fixed relative positions to one another.

According to a third aspect of the invention, a rail system for an elevator system is proposed, wherein the rail system has at least one universal bracket according to the approach proposed here as a reference bracket has a pit assembly according to the approach proposed here, at least one universal bracket according to the approach proposed here as an intermediate bracket and at least one rail, wherein the fastening points of the pit assembly are arranged under the guides of the reference bracket and the guides of the intermediate bracket are aligned between the guides of the reference bracket and the fastening points of the pit assembly, wherein the rail is mounted to the mounting points of the pit assembly, the intermediate bracket and the reference bracket.

According to a fourth aspect of the invention, a method for aligning a rail system of an elevator system in an elevator shaft for the elevator system is proposed, wherein a universal console according to the approach proposed here is arranged as a reference console in the region of an upper end of the elevator shaft and positioned and aligned on a wall of the elevator shaft, a first guide line is guided through the first guide of the reference console and lowered to a lower end of the elevator shaft and a second guide line is guided through the second guide of the reference console and lowered to the lower end of the elevator shaft, wherein a pit assembly according to the approach proposed here is arranged at the lower end of the elevator shaft, the first fastening point of the pit assembly is positioned relative to the first guide line and the second fastening point of the pit assembly is positioned relative to the second guide line, wherein the first guide line is fastened to the first fastening point and the second guide line is fastened to the second fastening point, wherein at least one universal console according to the approach proposed here is arranged as an intermediate console between the reference console and the pit assembly in the elevator shaft until the first guide of the intermediate bracket is aligned with the first guideline and the second guide of the intermediate bracket is aligned with the second guideline, and wherein at least one rail of the rail system is mounted to the mounting points of the pit assembly, the intermediate bracket and the reference bracket.

Possible features and advantages of embodiments of the invention may be considered to be based, among other things and without limiting the invention, on ideas and findings described below.

A universal bracket for a rail system of an elevator system can be used to install guide lines in a suitable position within an elevator shaft. During installation of the rail system, other components of the rail system can be aligned using the guide lines. A guide line can be understood in particular as a plumb line with a hanging plumb weight. The plumb weight ensures that the plumb line is aligned vertically. A guide line can be stretched between essentially any two points and takes the shortest connecting line between the points. This means that a guide line can also be stretched in space at a structurally predetermined angle. For example, the guide line can compensate for a lateral offset of up to ten centimeters between the pit assembly and the reference bracket.

A universal bracket can be a structural component for a rail system of an elevator system. The universal bracket can provide a mechanically resilient connection between rails of the rail system and a particularly load-bearing wall of an elevator shaft of a building. Preferably, a front wall of the shaft, which has the floor doors, forms the wall. The universal bracket can be dimensioned to suit the load. The universal bracket can divert lateral forces that arise, in particular during operation of the elevator system, into the building. The universal bracket can be composed of several individual parts. The individual parts can, for example, be bent parts made of previously cut sheet metal. The individual parts can be screwed together. The individual parts can also be pinned or welded together. A central part of the universal bracket can be referred to as the main support. The main support can have fastening points for connecting to the wall or a fastening means anchored in the wall. The fastening points can be designed to position the universal bracket laterally relative to the fastening means and to align an angle of the universal bracket in space. The mounting point can define a position and location of at least one rail.

A pit assembly may be a lowest structural component of the rail system. A lower end of the elevator shaft may be referred to as a pit. The The pit assembly can provide a mechanically resilient connection between the rail and the pit. The pit assembly is preferably attached to a particularly load-bearing floor of the elevator shaft or pit. The pit assembly can also or alternatively be attached to a particularly load-bearing wall of the elevator shaft or pit. The pit assembly can be dimensioned to withstand the load. The pit assembly can divert vertical forces that arise during operation of the elevator system into the building or a foundation. The pit assembly can be made up of several individual parts. The individual parts can be bent parts made of previously cut sheet metal, for example. The individual parts can be screwed together. The individual parts can also be pinned or welded together. A central part of the pit assembly can be referred to as a floor support. A part connected to the floor support can be referred to as a fastening support. The fastening support can have the fastening points for the guide cords on a side facing away from the floor support. The floor support may have fastening points for connection to the floor or a fastening device anchored in the floor.

The main beam can have two guides that are arranged in structurally predetermined relative positions to the mounting point and the fastening points to the building. The main beam can have the guides on a side facing away from the mounting point. The relative positions can be identical for all universal brackets of a rail system. This means that the universal brackets can be used for several applications, in particular as a reference bracket and as an intermediate bracket. A universal bracket according to the approach presented here can be used as a replacement for the pit assembly. A reference bracket, with its orientation in the elevator shaft, specifies a fixed position and location of the other components of the rail system. An orientation of an intermediate bracket is adapted to the orientation of the reference bracket.

The main beam can have an upper chord and a lower chord aligned essentially parallel thereto and at least one web arranged between the upper chord and the lower chord. The guides can each be designed as a first chine on the upper chord and a second chine on the lower chord. The first chine and the The second rear sight can be arranged vertically one above the other when the universal bracket is aligned as intended. A rear sight can be a V-shaped recess in particular. The rear sight can be arranged on an edge of the main support. The main support can have a C-shaped cross section.

A guide line can be arranged or attached in each of the guides. The guide lines can be attached temporarily, i.e. reversibly and detachably. One end of the guide line can be attached to the guide. An opposite end of the guide line can be weighted down. The guide line can be made up of several fibers or be designed as a wire, for example.

The guides can be arranged on one side of the wall or on the side of the main support facing away from the mounting point. The universal bracket can be mounted using the guides on the wall side without touching the alignment cords. The universal bracket can then be easily inserted into the shaft, roughly aligned and then moved onto the threaded bolt to match the alignment cords. Alternatively, the universal bracket can be inserted between the wall and the alignment cords.

The universal console can have at least one rail support aligned transversely to the main support. The mounting point can be arranged at an end region of the rail support facing away from the main support. An opposite end region of the rail support can be connected to the main support. In particular, the universal console can have two rail supports, each with at least one mounting point, which are connected to the main support at opposite end regions of the main support. The rail supports can be spaced far enough apart that a cabin of the elevator system fits between the rail supports.

The reference console can be arranged below the topmost shaft door threshold of the elevator shaft. The intermediate console can be arranged below the shaft door threshold of the elevator shaft, which is below the topmost shaft door threshold. The universal console can have mounts on its top side for a door guide of a shaft door of the elevator system. The door guide can be in the positioned and aligned in the same work step as the universal console itself. By arranging it below the shaft door threshold, lateral forces can be diverted directly into the building when loading and unloading the elevator car.

The reference bracket can be aligned using the alignment cords in the guides to align the upper mounting points. The position of the reference bracket in the elevator shaft can be adjusted by moving the alignment cords on both guides to a correct position within the respective guide. This means that additional alignment aids are not required.

The guide cords can be attached to the pit assembly attachment points after positioning and aligning the pit assembly. The guide cords can be put under tension. The guide cords can be pulled tight. A connection at both ends can prevent the guide cords from swinging. This allows the intermediate brackets to be aligned without delays caused by swinging guide cords.

The main beam can have two positioning and alignment devices, which can be designed as recesses in the main beam in the area of the guides. The distance between the main beam and the wall can be adjusted using threaded bolts that can be arranged in the recesses and anchored in the wall. The angle of the main beam to the wall can be adjusted using spherical caps that can be clamped to the edge of the recesses. The universal bracket can therefore be positioned in all spatial directions and aligned at all spatial angles. The recesses can be arranged in particular on the web between the upper and lower chords, which is aligned essentially parallel to the wall.

An upper end of the guide cords can be hooked into the guides. The upper end can, for example, have a thickening similar to a bicycle brake cable, which has larger dimensions than the guide. The guides can therefore have a half-closed shape to prevent the thickening from slipping out of the guide. For example, the guide can be designed as a slotted circle. A width of the slot corresponds to approximately a diameter of the guide line, while a diameter of the circle is smaller than a diameter of the thickening. The intermediate bracket can be positioned and aligned so that the guide lines each run through a center of the circle of their guides.

Alternatively, the upper end of the guide cords can be attached to a fastening device in the elevator shaft. For example, the guide cords can be attached to an eyelet or screw in a wall of the elevator shaft. The guide cords can also be attached in the area of the floor above the reference console.

The upper end of the guide cords can be attached to the reference console itself. For example, the guide cords can be looped around the reference console and knotted to themselves or to the reference console.

It is noted that some of the possible features and advantages of the invention are described herein with reference to different embodiments. One skilled in the art will recognize that the features of the universal console, the pit assembly, the rail system and the method can be suitably combined, adapted or interchanged to arrive at further embodiments of the invention.

• Fig. 1 zeigt eine Darstellung eines im Aufbau befindlichen Schienensystems einer Aufzuganlage mit Universalkonsolen gemäss einem Ausführungsbeispiel;
• Fig. 2 zeigt eine Darstellung einer als Referenzkonsole verwendeten Universalkonsole gemäss einem Ausführungsbeispiel;
• Fig. 3 zeigt eine Darstellung einer Grubenbaugruppe gemäss einem Ausführungsbeispiel; und
• Fig. 4 zeigt eine Darstellung eines Ausrichtens einer als Zwischenkonsole verwendeten Universalkonsole gemäss einem Ausführungsbeispiel.

Embodiments of the invention will now be described with reference to the accompanying drawings, wherein neither the drawings nor the description are to be construed as limiting the invention.

• Fig.1 shows a representation of a rail system under construction of an elevator system with universal brackets according to an embodiment;
• Fig.2 shows a representation of a universal console used as a reference console according to an embodiment;
• Fig. 3 shows a representation of a pit assembly according to an embodiment; and
• Fig.4 shows a representation of an alignment of a universal console used as an intermediate console according to an embodiment.

The figures are merely schematic and not to scale. The same reference symbols in the various figures indicate the same or equivalent features.

Fig.1 shows a representation of a rail system 100 under construction with universal brackets 102 and a pit assembly 104 according to an embodiment. The rail system 100 is installed in an elevator shaft. The elevator shaft is only shown in outline here and extends over three floors of a building. Movable components of the elevator system are later guided by the rail system 100 in a vertical direction. Rails 106 of the rail system 100 are mounted on the universal brackets 102 and on the pit assembly 104. The universal brackets 102 and the pit assembly 104 specify a later position of the rails 106 in the elevator shaft.

The rail system 100 is constructed from above. The top of the universal brackets 102 is attached to a wall 110 of the elevator shaft as a reference bracket 108 and a main support 112 of the reference bracket 108 is aligned substantially parallel to the wall 110 so that rail supports 114 of the reference bracket 108 extend horizontally away from the wall 110 into the elevator shaft. Mounting points 116 for mounting the rails of the rail system are arranged at the end areas of the rail supports 114.

In one embodiment, the reference console 108 is positioned on the wall 110 below a shaft door threshold of the top floor connected by the elevator shaft and is aligned horizontally. A door guide of the reference console 108 is set to a height of the shaft door threshold. An angular position of the door guide is already predetermined by the alignment of the reference console 108.

Then two guide cords 118 or guide lines are attached to the reference console 108 and each is guided through a guide 120 of the reference console 108. Plumb lines 122 are attached to the ends of the guide cords 118. Due to the weight of the plumb lines 122, the plumb lines 122 and thus also the guide cords 118 hang vertically from the guides 120 of the reference bracket 108 downwards into the elevator shaft.

The guide cords 118 are set long enough so that the plumb lines 122 hang just above a floor 124 of the elevator shaft. The pit assembly 104 is positioned on the floor 124 using the plumb lines 122. The pit assembly 104 is moved on the floor 124 until the fastening points 126 of the pit assembly 104 are aligned with the plumb lines 122 or the guide cords 118. After alignment, the mounting points 116 of the pit assembly 104 are positioned according to the design. The pit assembly 104 is fixed in this position. To prevent the plumb lines 122 from swinging, the guide cords 118 can be attached to the fastening points 126 of the pit assembly 104.

If the fastening points 126 of the pit assembly 104 cannot be aligned with the plumb lines 122, a distance of the reference bracket 108 to the wall 110 is set. In this way, tolerances of the elevator shaft can be compensated.

In an alternative embodiment, instead of the pit assembly 104, an additional universal console is arranged as a pit console in the elevator shaft. In contrast to the pit assembly 104 designed specifically for this purpose, the pit console is not attached to the floor 124 but to the wall 110 and is aligned horizontally via alignment devices on fastening means in the wall 110 until the guides of the pit console are aligned with the plumb lines 122 or guide cords 118. After alignment, the mounting points of the pit console are arranged vertically below the mounting points 116 of the reference console 108.

Between the reference bracket 108 and the pit assembly 104, another universal bracket 102 is attached to the wall 110 as an intermediate bracket 128. The intermediate bracket 128 is positioned below a shaft door threshold of the middle floor. An angular position of the intermediate bracket 128 is adjusted until the intermediate bracket 128 is aligned horizontally and guides 120 of the Intermediate bracket 128 is aligned with the guide cords 118. A door guide of the intermediate bracket 128 is adjusted to a height of the shaft door threshold.

After all guides 120 are aligned vertically one above the other using the plumb lines 122 or alignment cords 118, the mounting points 116 for the rails 106 are also arranged vertically one above the other. The rails 106 can thus be mounted without further alignment. The alignment cords 118 are removed after the rail system 100 has been assembled and can be reused.

Fig.2 shows a representation of a universal console 102 used as a reference console 108 according to an embodiment. The reference console 108 essentially corresponds to the reference console in Fig.1 . The reference console 108 is as in Fig.1 arranged in front of the wall 110 of the elevator shaft and aligned in an installation position. The main beam 112 is designed here as a C-shaped profile with an upper chord 200, a lower chord 202 and a web 204 connecting the upper chord 200 and the lower chord 202. The C of the main beam 112 is open to the wall 110. The upper chord 200, the lower chord 202 and the web 204 have recesses to save material.

Here, one of the guides 120 is shown with one of the guide cords 118. The guide 120 has a first chine 206 in the upper chord 200 and a second chine 208 in the lower chord 202. The chines 206, 208 are arranged vertically one above the other when the universal bracket 102 is aligned in its intended position in space. The chines 206, 208 are spaced apart from one another by a width of the web 204. The guide cord 118 is knotted here on the main beam 112 in the area of the upper chord 200 and runs through the first chine 206 and the second chine 208 downwards towards a lower end of the elevator shaft.

The chines 206, 208 are designed as V-shaped notches. The guide line 118 is located at a low point of the notches. In order not to weaken the main beam 112, the chines 206, 208 are arranged outside a loaded cross-section of the main beam 112. The chines 206, 208 are arranged in projections protruding from the upper chord 200 and the lower chord 202.

Fig. 3 shows a representation of a pit assembly 104 according to an embodiment. The pit assembly 104 essentially corresponds to the pit assembly in Fig.1 . A rail 106 of the rail system has been connected to one of the mounting points 116 of the pit assembly 104. The rail 106 is designed to guide a car of the elevator system and a counterweight of the elevator system vertically in the elevator shaft.

The pit assembly 104 has a floor support 302 and a fastening support 304. The floor support 302 has the mounting points 116 at opposite ends. A length of the floor support 302 therefore essentially corresponds to a clear width of the rail system. The fastening support 304 is attached to the floor support 302 and has the fastening points 126. The fastening support 304 positions the fastening points 126 in a fixed relative position to the mounting points 116. When positioning the pit assembly 104, the floor support 302 and the fastening support 304 are pushed back and forth until the fastening points 126 are aligned with the hanging plumb lines or alignment cords 118. In this position, the pit assembly 104 is screwed to the floor 124. Here, the guide cords 118 are attached to the fastening points 126 to tighten them.

The floor support 302 is designed as a U-profile that is open at the top. The fastening support 304 extends as a sheet along the floor 124 to a flange that is bent upwards, on which the fastening points 126 are arranged at the specified distance from one another and in the correct relative position to the mounting points 116. The fastening points 126 are arranged at opposite ends of the flange. The fastening support 304 has a large recess in the area of the floor 124 to reduce weight and save material.

The fastening points 126 of the pit assembly 104 are designed differently than the guides of the universal consoles. The fastening points 126 each have only one notch 306 through which the guide line 118 is guided. The notch 306 is aligned towards the floor 124 and clamps the guide line 118 when it is under Tension is applied. In order to secure the guide line 118 in the fastening point 126, the guide line 118 can be knotted to the fastening point 126.

Fig.4 shows an illustration of an alignment of a universal console 102 used as an intermediate console 128 according to an embodiment. The intermediate console 128 essentially corresponds to the universal console used as a reference console in Fig.2 Here, the reference console on a floor above the building and the pit assembly at the lower end of the elevator shaft are already aligned with each other and fixed in their intended position. The guide cords 118 are stretched between the guides of the reference console and the fastening points of the pit assembly. The guide cords 118 run at a short distance from the wall 110 of the elevator shaft.

The intermediate bracket 128 is attached to threaded bolts 400 that are anchored in the wall 110 and extend essentially horizontally into the elevator shaft. The intermediate bracket 128 is pushed onto the threaded bolts 400 and temporarily fixed using an alignment device for each threaded bolt 400. The alignment cords 118 run through a gap 402 between the main support 112 and the wall 110.

Stops are arranged on the threaded bolts 400, via which a distance of the main support 112 to the wall 110 and an angular position of the entire intermediate bracket 128 can be set. The stops are adjusted so that the guide cords 118 run exactly through both chines 206, 208 of the guides 120 of the intermediate bracket 128, without the guide cords 118 deflecting sideways. As a result, both the distance and the angular position of the intermediate bracket 128 are adjusted so that the mounting points of the intermediate bracket 128 are arranged vertically below the mounting points of the reference bracket. After alignment, the intermediate bracket 128 is finally fixed to the threaded bolt 400 by tightening lock nuts. After tightening, the guide cords 118 run straight through the guides 120, i.e. without kinks. In this way, further intermediate brackets can be aligned using the guide cords 118.

Finally, it should be noted that terms such as "having", "comprising", 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 that have been described with reference to one of the above embodiments can also be used in combination with other features or steps of other embodiments described above. Reference signs in the claims are not to be regarded as a limitation.

Claims (11)

1. A universal bracket (102) for a rail system (100) of an elevator system, wherein the universal bracket (102) has a positionable and alignable main support (112) and at least one mounting point (116) for at least one rail (106) of the rail system (100), characterized in that the main support (112) has two guides (120) inseparably connected to the main support (112), each for guiding a plumb line (118), wherein the mounting point (116) and the guides (120) are arranged in fixed relative positions with respect to one another.
2. The universal bracket (102) according to claim 1, wherein the main support (112) has an upper flange (200) and a lower flange (202) aligned substantially in parallel therewith, wherein the guides (120) are each designed as a first notch (206) on the upper flange (200) and a second notch (208) on the lower flange (202).
3. The universal bracket (102) according to any of the preceding claims, wherein the guides (120) are arranged on a side of the main support (112) facing away from the mounting point (116).
4. The universal bracket (102) according to any of the preceding claims, comprising at least one rail support (114) aligned transversely to the main support (112), wherein the mounting point (116) is arranged at an end region of the rail support (114) facing away from the main support (112) and an opposite end region of the rail support (114) is connected to the main support (112).
5. A pit assembly (104) for a rail system (100) of an elevator system, wherein the pit assembly (104) has a floor support (302) and a fastening support (304) aligned transversely to the floor support (302), characterized in that the floor support (302) has at least one mounting point (116) for at least one rail (106) of the rail system (100) and the fastening support (304) has two fastening points (126) inseparably connected to the fastening support (304), each for fastening a plumb line (118), wherein the mounting point (116) and the fastening points (126) are arranged in fixed relative positions with respect to one another.
6. A rail system (100) for an elevator system, wherein the rail system (100) comprises at least one universal bracket (102) according to any of claims 1 to 4 as a reference bracket (108), a pit assembly (104) according to claim 5, at least one universal bracket (102) according to any of claims 1 to 4 as an intermediate bracket (128), and at least one rail (106), wherein the fastening points (120) of the pit assembly (104) are arranged under the guides (120) of the reference bracket (108) and the guides (120) of the intermediate bracket (128) are positioned between the guides (120) of the reference bracket (108) and the fastening points (126) of the pit assembly (104), wherein the rail is mounted at the mounting points (116) of the pit assembly (104), the intermediate bracket (128), and the reference bracket (108).
7. A method for aligning a rail system (100) of an elevator system in an elevator shaft of the elevator system, wherein a universal bracket (102) according to any of claims 1 to 4 is arranged as a reference bracket (108) in the region of an upper end of the elevator shaft and is positioned and aligned on a wall (110) of the elevator shaft, a first plumb line (118) is guided through the first guide (120) of the reference bracket (108) and is lowered to a lower end of the elevator shaft, and a second plumb line (118) is guided through the second guide (120) of the reference bracket (108) and is lowered to the lower end of the elevator shaft, wherein a pit assembly (104) according to claim 5 is arranged at the lower end of the elevator shaft, the first fastening point (126) of the pit assembly (104) is positioned relative to the first plumb line (118) and the second fastening point (126) of the pit assembly (104) is positioned relative to the second plumb line (118), wherein the first plumb line (118) is fastened to the first fastening point (126) and the second plumb line (118) is fastened to the second fastening point (126), wherein at least one universal bracket (102) according to any of claims 1 to 4 is positioned and aligned as an intermediate bracket (128) between the reference bracket (108) and the pit assembly (104) in the elevator shaft until the first guide (120) of the intermediate bracket (128) is aligned with the first plumb line (118) and the second guide (120) of the intermediate bracket (128) is aligned with the second plumb line (118), and wherein at least one rail (106) of the rail system (100) is mounted at the mounting points (116) of the pit assembly (104), the intermediate bracket (128), and the reference bracket (108).
8. The method according to claim 7, wherein the reference bracket (108) is positioned below an uppermost shaft door sill of the elevator shaft, and/or the intermediate bracket (128) is positioned below a shaft door sill of the elevator shaft.
9. The method according to any of claims 7 to 8, wherein an upper end of the plumb lines (118) is hooked into the guides (120).
10. The method according to any of claims 7 to 8, wherein an upper end of the plumb lines (118) is fastened to a fastening means of the elevator shaft.
11. The method according to any of claims 7 to 8, wherein an upper end of the plumb lines (118) is fastened to the reference bracket (108).

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