A device for adjusting the length of an elevator compensating chain, an elevator equipped with the elevator compensating chain length adjustment device, and a method for adjusting the length of an elevator compensating chain.

Abstract

The present invention provides an elevator compensating chain length adjustment device, an elevator, and a method for adjusting the length of an elevator compensating chain, which allows for a single fixing point for the elevator compensating chain in the elevator car or counterweight. [Solution] The elevator compensation chain length adjustment device is mounted along the length direction of the elevator compensation chain and includes a length adjustment section that extends and retracts in the length direction of the elevator compensation chain. With this configuration, the fixing point of the elevator compensation chain in the car or counterweight can be reduced to one location.

Description

Technical Field

[0001] This application relates to an elevator compensation chain length adjustment device, an elevator including the elevator compensation chain length adjustment device, and an elevator compensation chain length adjustment method.

Background Art

[0002] Conventionally, when the length of the elevator compensation chain needs to be adjusted, such as when the main cable stretches, the middle part of the elevator compensation chain was fixed adjacent to the fixing part at the end of the elevator compensation chain (for example, Patent Document 1).

[0003] The elevator compensation chain length adjustment device of Patent Document 1 needs to provide two fixing parts of the elevator compensation chain on the car or the counterweight, and requires space in the lateral direction.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] Therefore, the problem is to provide an elevator compensation chain length adjustment device that can have only one fixing part of the elevator compensation chain on the car or the counterweight, an elevator including the elevator compensation chain length adjustment device, and an elevator compensation chain length adjustment method.

Means for Solving the Problems

[0006] [1] The elevator compensation chain length adjustment device is attached along the length direction of the elevator compensation chain and includes a length adjustment part that expands and contracts in the length direction.

[0007] [2] Furthermore, the length adjustment section [1] described above may include a first member and a second member that moves along the longitudinal direction of the elevator compensating chain.

[0008] [3] Furthermore, the second member of [2] described above may slide along the length of the elevator compensating chain.

[0009] [4] Furthermore, the elevator is equipped with one of the elevator compensating chain length adjustment devices described in [1] to [3] above.

[0010] [5] Furthermore, the method for adjusting the length of the elevator compensating chain uses one of the elevator compensating chain length adjustment devices described in [1] to [3] above. [Brief explanation of the drawing]

[0011] [Figure 1] Overall view of the elevator [Figure 2] (a) Front view and (b) Side view of the suspension point and length adjustment device for the elevator compensating chain according to the first embodiment. [Figure 3] (a) A diagram showing the elevator compensation chain length adjustment device in its shortened state, and (b) A diagram showing it in its extended state, according to the first embodiment. [Figure 4] (a) Front view and (b) Side view of the suspension point and length adjustment device for the elevator compensating chain according to the second embodiment. [Figure 5] (a) A diagram showing the elevator compensation chain length adjustment device in a shortened state, and (b) A diagram showing the length adjustment device in an extended state, according to the second embodiment. [Figure 6] (a) Front view and (b) Side view of the suspension point and length adjustment device for the elevator compensating chain according to the third embodiment. [Figure 7] A diagram showing the elevator compensation chain length adjustment device in a third embodiment, with (a) the shortened state and (b) the extended state. [Figure 8] Diagram of an elevator compensating chain length adjustment device related to other usage configurations. [Figure 9]Diagram of the length adjustment device for an elevator compensation chain according to another usage mode [Figure 10] Diagram of the length adjustment device for an elevator compensation chain according to another usage mode [Figure 11] Diagram of the length adjustment device for an elevator compensation chain according to another usage mode

Mode for Carrying Out the Invention

[0012] Hereinafter, embodiments of the present invention will be described based on the drawings. Note that the dimensional ratios in each drawing do not necessarily match the actual dimensional ratios. Also, the dimensional ratios between the drawings do not necessarily match either.

[0013] In each drawing, the first direction D1 is the first horizontal direction D1, the second direction D2 is the second horizontal direction D2 orthogonal to the first horizontal direction D1, and the third direction D3 is the vertical direction D3 orthogonal to the first horizontal direction D1 and the second horizontal direction D2 respectively.

[0014] As shown in FIG. 1, the elevator device includes a car 101 and a counterweight 102 that move up and down in the hoistway 100 in the vertical direction D3. Among the vertical direction D3, among the plurality of stop floors (not shown) of the elevator, the direction toward the uppermost floor is the upward direction D31, and the direction toward the lowermost floor is the direction D32. The car 101 and the counterweight 102 are connected by a main rope 103, and the main rope 103 is wound around a drum 105 which is one of the components of the hoisting machine 104. Although FIG. 1 shows the case where the hoisting machine 104 is arranged at the upper part of the hoistway 100, the hoisting machine 104 may be arranged at the lower part of the hoistway 100 by adding a return car and changing the path of the main rope 103.

[0015] Although there is a weight difference (unbalance) between the car 101 and the counterweight 102, due to the frictional force between the sheave 105 and the main cable 103, the main cable 103 does not slide on the surface of the sheave 105. However, in the case of an elevator with a large hoistway travel, the main cable 103 becomes longer, and the weight of the main cable 103 itself is added to the above-mentioned unbalance. Therefore, especially when the car 101 and the counterweight 102 are separated in the upward direction D31 and the downward direction D32, respectively, it becomes difficult for the above-mentioned unbalance to be endured by the frictional force.

[0016] Therefore, an elevator compensation chain 1 is suspended so as to connect the lower ends of the car 101 and the counterweight 102. If the elevator compensation chain 1 is selected so that the weight per unit length of the elevator compensation chain 1 is close to the weight per unit length of the main cable 103, as the unbalance to be endured by the frictional force between the main cable 103 and the sheave 105, only the weight difference between the car 101 and the counterweight 102 needs to be considered. The elevator compensation chain 1 is, for example, a chain or a rope. Also, the material of the elevator compensation chain 1 may be a metal such as iron, or other materials such as a resin with sufficient strength.

[0017] The end of the elevator compensation chain 1 is connected to a suspension member 3 provided on the car 101 or the counterweight 102. The suspension member 3 is constituted mainly of, for example, a U-bolt 31 (in Patent Document 1, a U-bolt 7).

[0018] The length of the elevator compensation chain 1 needs to have a margin such that it hangs naturally without horizontally pulling the suspension member 3 when the car 101 or the counterweight 102 descends to the lowest position. However, it must be adjusted so that the folded portion of the elevator compensation chain 1 does not contact the bottom of the hoistway 100.

[0019] Furthermore, when the elevator is installed for the first time, the height of the hoistway 100 may have an error with respect to the prior information. Also, after installation, the main cable 103 elongates due to the weights of the car 101 and the counterweight 102. As the main cable 103 elongates, the elevator compensation cable 1 also descends.

[0020] After the elevator is installed, the length of the elevator compensating chain 1 becomes excessive and needs to be shortened. However, cutting the chain is laborious, and if the elevator compensating chain 1 is cut when the main cable 103 is stretched out and needs to be shortened or replaced, then the length of the elevator compensating chain 1 will become insufficient. Therefore, the elevator compensation chain 1 needs to be adjustable in length. [Examples]

[0021] Therefore, in the present invention, as shown in Figures 2 and 3, a telescopic length adjustment device 2 is provided between the elevator compensating chain 1 and the suspension 3. Any method of extension or retraction is acceptable, but for example, in this embodiment, the length adjustment device 2 is composed of a first member 21 and a second member 22. The first member 21 is a rectangular plate with one side as the longest, and has an elongated hole 21a along its longest side. The second member 22 is a rectangular plate with one side as the longest, and has an elongated hole 22a along its longest side.

[0022] The first member 21 is positioned so that its longitudinal side is parallel to the vertical direction D3, and is connected to the suspension 3 at the upper D31 end of the elongated hole 21a. The second member 22 is positioned so that its longitudinal side is parallel to the vertical direction D3, and is connected to the upper D31 end of the elevator compensating chain at the lower D32 end of the elongated hole 22a. The elongated hole 22a may be partially open to form an opening 22b to facilitate insertion of the end of the elevator compensating chain. For example, if the distance L2 between the upper D31 end of the elongated hole 21a and the upper D31 end of the first member 21 is made approximately the same as the thickness D of the chain element 11 that constitutes the elevator compensation chain 1, then the first member 21 can be attached to the suspension 3 in place of the elevator compensation chain 1, and the structure and dimensions of the suspension 3 do not need to be changed.

[0023] To install the telescopic length adjustment device 2 between the elevator compensation chain 1 and the suspension part 3, first, the suspension part 3 is disassembled and the U-bolt 31 is passed through the elongated hole 21a of the first member 21. In this state, the U-bolt 31 is attached to the car 101 or counterweight 102 with a nut 32 or the like, and the suspension part 3 is reassembled, resulting in the first member 21 being suspended from the downward D32 end of the U-bolt 31.

[0024] Next, the upper end of the elevator compensating chain 1 is passed through the opening 22b of the elongated hole 22a of the second member 22, and the elevator compensating chain 1 is suspended from the end of the elongated hole 22a on the downward D32 side. Furthermore, the second member 22 is positioned along the first member 21 such that the elongated holes 21a and 22a partially overlap when viewed in the first lateral direction D1. For example, the first member 21 and the second member 22 are connected by inserting a bolt 23 through the elongated holes 21a and 22a from the first lateral direction D1 and fastening a nut 24. The first member 21 and the second member 22 may be more securely fastened by adding washers to the bolt 23 and nut 24.

[0025] When the elevator compensation chain 1 is long, the amount by which the second member 22 overlaps the first member 21 in the vertical direction D3 is increased, as shown in Figure 3(a). When the elevator compensation chain 1 is short, the amount by which the second member 22 overlaps the first member 21 in the vertical direction D3 is decreased, as shown in Figure 3(b). If it is necessary to adjust the length of the elevator compensation chain 1, the second member 22 is moved by sliding it along the vertical direction D3 of the first member 21. [Examples]

[0026] In the present invention, as shown in Figures 4 and 5, a telescopic length adjustment device 4 is provided between the elevator compensating chain 1 and the suspension point 3. For example, in this embodiment, the length adjustment device 4 is composed of a first member 41 and a second member 42.

[0027] The first member 41 is composed of a rod-shaped portion 411 and a plate-shaped portion 412. The rod-shaped portion 411 and the plate-shaped portion 412 are connected near their respective ends by welding or the like to form a single unit. The first member 41 is arranged such that the rod-shaped portion 411 is parallel to the vertical direction D3, and the plate-shaped portion 412 is on the upward direction D31 side. The rod-shaped portion 411 has a male thread running from the lower end D32 side to near the point where it connects to the plate portion 412; this portion is the threaded portion 411a. The threaded portion 411a may extend along the entire length of the rod-shaped portion 411. A hole 412a is provided at the end of the plate portion 412 on the upward D31 side (the side opposite to the one connected to the rod-shaped portion 411).

[0028] The second member 42 is made by bending a rectangular plate into an L-shape, with one side being longer and the other shorter. The longer side of the bend is designated as plate portion 421, and the shorter side as plate portion 422. The second member 42 is positioned such that plate portion 421 is parallel to the vertical direction D3, and plate portion 422 is positioned on the upward direction D31 side and parallel to the first horizontal direction D1. A slit 42a is open along the vertical direction D3 of the second member 42. The slit 42a is open on the end of plate portion 422 opposite to the bend, forming an open portion 42b. In other words, the slit 42a is closed on the downward direction D32 side.

[0029] The first member 41 is connected to the suspension 3 at the upper D31 end of the hole 412a. The second member 42 is connected to the end of the elevator compensating chain 1 at the closed lower D32 end of the slit 42a. For example, if the distance L4 between the upper D31 end of the hole 412a and the upper D31 end of the first member 41 is made approximately the same as the thickness D of the chain element 11 that constitutes the elevator compensating chain 1, then the first member 41 can be attached to the suspension 3 in place of the elevator compensating chain 1, and the structure and dimensions of the suspension 3 do not need to be changed.

[0030] To install the telescopic length adjustment device 4 between the elevator compensation chain 1 and the suspension part 3, first, the suspension part 3 is disassembled and the U-bolt 31 is passed through the hole 412a of the first member 41. In this state, the U-bolt 31 is attached to the car 101 or counterweight 102 with a nut 32 or the like, and the suspension part 3 is reassembled, resulting in the first member 41 being suspended from the lower end of the U-bolt 31.

[0031] Next, the upper end of the elevator compensating chain 1 is passed through the opening 42b of the second member 42, and the elevator compensating chain 1 is suspended from the lower end of the slit 42a. Furthermore, the threaded portion 411a is inserted through the opening 42b. For example, the first member 41 and the second member 42 are connected by screwing nuts 43, 43... onto the threaded portion 411a beforehand, then inserting it through the opening 42b, and fastening the plate portion 422 by sandwiching it with the nuts 43, 43.... The first member 41 and the second member 42 may be fastened more firmly by using double nuts 43, 43 on either the upper D31 side or the lower D32 side of the plate portion 422.

[0032] When the elevator compensation chain 1 is long, the amount by which the threaded portion 411a passes through the slit 42a in the vertical direction D3 is increased, as shown in Figure 5(a). When the elevator compensation chain 1 is short, the amount by which the threaded portion 411a passes through the slit 42a in the vertical direction D3 is decreased, as shown in Figure 5(b). If it is necessary to adjust the length of the elevator compensation chain 1, the second member 42 is moved by sliding it along the vertical direction D3 of the first member 41. [Examples]

[0033] In the present invention, as shown in Figures 6 and 7, a telescopic length adjustment device 5 is provided between the elevator compensating chain 1 and the suspension point 3. For example, in this embodiment, the length adjustment device 5 is composed of a first member 51 and a second member 52.

[0034] The first member 51 is made by bending a rectangular plate into an L-shape, with one side being longer and the other shorter. The longer side of the bend is designated as plate section 511, and the shorter side as plate section 512. The first member 51 is positioned such that the longer plate section 511 is parallel to the vertical direction D3, and the shorter plate section 512 is positioned on the downward direction D32 side and parallel to the first horizontal direction D1. A hole 511a is drilled in the upper end of plate section 511 on the D31 side, and a hole 512a is drilled in plate section 512. Furthermore, a nut 513 is welded to plate section 512, centered with hole 512a. In other words, hole 512a is a pilot hole for the nut 513.

[0035] The second member 52 is composed of a rod-shaped member 521 and a connecting member 522. The surface of the rod-shaped member 521 has a male thread, and this portion is the threaded portion 521a. The threaded portion 521a may extend over substantially the entire length of the rod-shaped member 521. Alternatively, the rod-shaped member 521 may be a bolt. If the rod-shaped member 521 is a bolt, it has a bolt head 521b. The second member 52 is arranged such that the threaded portion 521a is parallel to the vertical direction D3, and the bolt head 521b is on the downward direction D32 side.

[0036] The connecting member 522 is a component for connecting the rod-shaped member 521 and the elevator compensating chain 1. For example, the connecting member 522 is a rectangular plate material bent near the center in the longitudinal direction. One side is a plate portion 522a and the other side is a plate portion 522b, with the bent portion in between. The connecting member 522 is positioned so that plate portion 522a is parallel to the vertical direction D3, and plate portion 522b is on the upward direction D31 side. A slit 522c is open along the vertical direction D3 of the connecting member 522. The slit 522c is open on the end of plate portion 522b opposite to the bent portion, forming an open portion 522d. In other words, the slit 522c is closed on the downward direction D32 side.

[0037] The first member 51 is connected to the suspension member 3 at the upper end D31 of the plate portion 511. The connecting member 522 is connected to the end of the elevator compensating chain 1 at the lower end D32 of the closed slit 522c. For example, if the distance L5 between the upper end D31 of the hole 511a and the upper end D31 of the first member 51 is made approximately the same as the thickness D of the chain element 11 that constitutes the elevator compensating chain 1, then the first member 51 can be attached to the suspension 3 in place of the elevator compensating chain 1, and the structure and dimensions of the suspension 3 do not need to be changed.

[0038] To install the telescopic length adjustment device 5 between the elevator compensation chain 1 and the suspension part 3, first, the suspension part 3 is disassembled and the U-bolt 31 is passed through the hole 511a of the first member 51. In this state, the U-bolt 31 is attached to the car 101 or counterweight 102 with a nut 32 or the like, and the suspension part 3 is reassembled, resulting in the first member 51 being suspended from the downward D32 end of the U-bolt 31.

[0039] Next, the upper end of the elevator compensation chain 1 is passed through the opening 522d of the slit 522c of the second member 52, and the elevator compensation chain 1 is suspended from the end of the slit 522c on the downward D32 side. Then, the rod-shaped member 521 is inserted vertically D3 through the opening 522d of the plate portion 522. For example, the rod-shaped member 521 is a bolt, and the rod-shaped member 521 and the connecting member 522 are connected by screwing a nut 53 onto the threaded portion 521a and fastening the plate portion 522b by sandwiching it between the nut 53 and the threaded head 521b. Alternatively, if the rod-shaped member 521 is a threaded rod, nuts 53, 53 may be screwed onto the threaded portion 521a and fastened by sandwiching the plate portion 522b between the nuts 53, 53. The rod-shaped member 521 and the connecting member 522 may be more securely fastened by using double nuts 53, 53 on the upper D31 or lower D32 side of the plate portion 522b, or by adding washers to the threaded portion 521a and the nut 53. Other methods may be used to fix the rod-shaped member 521 and the connecting member 522.

[0040] Next, the first member 51 and the second member 52 are connected by screwing a nut 53 onto the threaded portion 521a of the rod-shaped member 521, and screwing the threaded portion 521a onto the nut 513 welded to the first member 51, thereby sandwiching the plate portion 512 between the nuts 53 and fastening them together. The first member 21 and the second member 22 may be more firmly fastened by adding a nut 53 to create a double nut on either the upper D31 side or the lower D32 side of the plate portion 512, or by adding a washer to the nut 53.

[0041] When the elevator compensation chain 1 is long, the amount by which the threaded portion 521a is inserted into the hole 512a in the vertical direction D3 is increased, as shown in Figure 7(a). When the elevator compensation chain 1 is short, the amount by which the threaded portion 521a is inserted into the hole 512a in the vertical direction D3 is decreased, as shown in Figure 7(b). If it is necessary to adjust the length of the elevator compensation chain 1, the rod-shaped member 521 is rotated along the vertical direction D3 of the first member 51.

[0042] [1] Therefore, it is desirable that the length adjustment devices 2, 4, and 5 of the elevator compensation chain 1 be configured such that they are mounted along the length direction of the elevator compensation chain 1 and include length adjustment parts that extend and retract in the length direction, as in this embodiment.

[0043] With this configuration, the fixing point of the elevator compensating chain 1 in the car or counterweight can be reduced to one location. Furthermore, with this configuration, the length of the elevator compensating chain 1 can be adjusted without cutting or shortening it.

[0044] [2] Furthermore, in the length adjustment devices 2, 4, and 5 of the elevator compensating chain 1 described in [1] above, it is preferable to have a configuration that includes first members 21, 41, and 51 and second members 22, 42, and 52 that move along the longitudinal direction of the elevator compensating chain 1, as in this embodiment.

[0045] With this configuration, the length adjustment device for the elevator compensation chain 1 can be made into a simple structure.

[0046] [3] Furthermore, in the length adjustment devices 2 and 4 of the elevator compensating chain 1 described in [2] above, it is preferable that the second members 22 and 42 slide and move in the longitudinal direction of the elevator compensating chain 1, as in this embodiment.

[0047] With this configuration, the length of the elevator compensation chain 1 can be adjusted in a simple manner.

[0048] [4] Furthermore, it is preferable that the elevator 100 is equipped with one of the length adjustment devices 2, 4, or 5 for the elevator compensating chain 1, which are any one of the above [1] to [3].

[0049] With this configuration, the elevator car 101 and the counterweight 102 of the elevator 100 can each have one fixing point for the elevator compensating chain 1, and at least one of them can be equipped with length adjustment devices 2, 4, and 5 for the elevator compensating chain 1.

[0050] [5] Furthermore, a preferred method for adjusting the length of the elevator compensating chain 1 is to use one of the elevator compensating chain 1 length adjustment devices 2, 4, or 5 described in [1] to [3] above.

[0051] According to this method, the length of the elevator compensating chain 1 can be adjusted at least on one of the fixing points of the elevator compensating chain 1 in the elevator car 101 and the counterweight 102 of the elevator 100.

[0052] Furthermore, the elevator car 101 and counterweight 102 of the elevator 100, and the length adjustment devices 2, 4, and 5 of the elevator compensating chain 1 can be implemented in various forms with improvements, modifications, or alterations based on the knowledge of a person skilled in the art, without departing from their intended purpose.

[0053] (A) In the above embodiment, length adjustment devices 2, 4, or 5 were connected between the elevator compensating chain 1 and the suspension 3, but the arrangement is not limited to this. That is, as shown in Figure 8, the upper ends of the length adjustment devices 2, 4, and 5 and the ends of the elevator compensating chain 1 may both be connected to the suspension 3, and the middle portion of the elevator compensating chain 1 may be connected to the lower ends of the length adjustment devices 2, 4, and 5.

[0054] According to the method described above, the length of the elevator compensating chain 1 can be adjusted by extending or retracting the length adjustment devices 2, 4, and 5, and further by changing the intermediate section of the elevator compensating chain 1 that is connected to the lower ends of the length adjustment devices 2, 4, and 5.

[0055] (B) In the above embodiment, length adjustment devices 2, 4, or 5 were connected between the elevator compensating chain 1 and the suspension 3, but the arrangement is not limited to this. That is, as shown in Figure 9, the elevator compensating chain 1 may be divided into two parts, elevator compensating chain 1A and elevator compensating chain 1B, one end of elevator compensating chain 1A may be connected to the suspension 3, the other end of elevator compensating chain 1A may be connected to the upper end of length adjustment devices 2, 4, or 5, and the lower end of length adjustment devices 2, 4, or 5 may be connected to the end of elevator compensating chain 1B.

[0056] According to the method described above, since the conventional elevator compensating chain 1 is connected to the suspension point 3, it is unnecessary to change the suspension point 3, and the length of the elevator compensating chain can be adjusted by extending or retracting the length adjustment devices 2, 4, and 5.

[0057] (C) In the above embodiment, length adjustment devices 2, 4, or 5 were connected between the elevator compensating chain 1 and the suspension 3, but the arrangement is not limited to this. That is, as shown in Figure 10, the upper ends of the length adjustment devices 2, 4, and 5 may be connected to an intermediate portion of the elevator compensating chain 1, and another intermediate portion of the elevator compensating chain 1 may be connected to the lower ends of the length adjustment devices 2, 4, and 5.

[0058] According to the method described above, the length of the elevator compensating chain 1 can be adjusted by extending or retracting the length adjustment devices 2, 4, and 5. Furthermore, it can also be adjusted by changing the intermediate section of the elevator compensating chain 1 that is connected to the upper or lower ends of the length adjustment devices 2, 4, and 5. In addition, since the conventional elevator compensating chain 1 is connected to the suspension point, it becomes unnecessary to change the suspension point.

[0059] (D) In ​​the above embodiment, the length adjustment device 2, 4, or 5 is composed of a first member and a second member, but it is not limited to this configuration. That is, as shown in Figure 11, the length adjustment device 6 may have a structure in which the entire device can extend and retract. The structure that extends and retracts is, for example, a link mechanism. [Explanation of Symbols]

[0060] 100 elevator shafts 101 basket 102 Counterweight 103 Main rope 104 Hoisting machine 105 Tug-of-War 1, 1A, 1B Elevator Compensation Chains 11 Chain elements 2, 4, 5, 6 Length adjustment device 21 First component 21a long hole 22 Second component 22a Slit 23 volts 24 nuts 3 Hanging base 31 U-bolt 32 nuts 41 First component 411 Rod-shaped part 411a Threaded part 412 Board part 412a Hole 42 Second component 421, 422 plate part 422 Board part 42a Slit 43 nuts 51 First component 511, 512 plate part 511a, 512a Hole 513 Nut 52 Second component 521 Rod-shaped member 521a Threaded part 521b Bolt head 522 Connecting member 522a, 522b plate part 522c Slit

Claims

1. An elevator compensation chain length adjustment device, The length adjustment device is, It is installed along the length of the elevator compensation chain, It includes a length adjustment section that expands and contracts in the aforementioned longitudinal direction, Elevator compensation chain length adjustment device.

2. The length adjustment section is, Equipped with the first component, The elevator comprises a second member that moves along the longitudinal direction of the elevator compensating chain, The elevator compensation chain length adjustment device according to claim 1.

3. The second member is, The elevator compensating chain slides and moves in the longitudinal direction. The elevator compensation chain length adjustment device according to claim 2.

4. The elevator is equipped with a length adjustment device for the elevator compensation chain as described in any one of claims 1 to 3. Elevator.

5. Using the elevator compensation chain length adjustment device described in any one of claims 1 to 3, Method for adjusting the length of the elevator compensation chain.

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