Rotation prevention jig for main rope connecting rod and method for adjusting tension of main rope

Abstract

To provide a rotation prevention jig for a main rope connecting rod, which can improve the workability of tension adjustment work for the main rope. [Solution] A rotation prevention jig (30) for a main rope connection rod comprises a first tool (31), a pair of split nuts (45), and a second tool (32). The first tool (31) applies a first rotational force in a first direction to an outer nut (24) that threads onto a threaded portion (22) of a main rope connection rod (20). The main rope connection rod (20) is connected to an end of a main rope (6). The outer nut (24) locks the position of an inner nut (23) that can adjust the tension of the main rope (6). The second tool (32) applies a second rotational force in a second direction opposite to the first direction to the pair of split nuts (45).

Description

[Technical Field]

[0001] The present disclosure relates to a main rope connecting rod anti-rotation jig and a main rope tension adjustment method. [Background technology]

[0002] When the tension of the main rope is adjusted by turning the nut on the threaded portion of the rope socket, a rotational force is applied to the rope socket. Therefore, a screwdriver is inserted into the hole of the rope socket to prevent the rope socket from rotating. This operation to prevent the rope socket from rotating may require two workers. Therefore, in Japanese Patent Laid-Open Publication No. 7-172732 (Patent Document 1), a rope socket anti-rotation jig is used to prevent the rope socket from rotating by one worker. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 7-172732 Summary of the Invention [Problem to be solved by the invention]

[0004] However, because there are various types of rope sockets, there are cases where the rope socket rotation prevention jig disclosed in Patent Document 1 cannot prevent rotation of the rope socket. The present disclosure has been made in consideration of the above-mentioned problems, and its purpose is to provide a main rope connecting rod rotation prevention jig and a main rope tension adjustment method that can improve the workability of main rope tension adjustment work regardless of the type of rope socket. [Means for solving the problem]

[0005] The disclosed main rope connection rod anti-rotation jig includes a first tool, a pair of split nuts, and a second tool. The first tool applies a first rotational force in a first direction to an outer nut that threads onto the threaded portion of the main rope connection rod. The main rope connection rod is connected to the end of an elevator main rope. The outer nut locks the position of an inner nut that can adjust the tension of the main rope. The second tool clamps the pair of split nuts that thread onto the threaded portion of the main rope connection rod and applies a second rotational force to the pair of split nuts in a second direction opposite to the first direction.

[0006] The disclosed method for adjusting tension of a main rope includes threading a pair of split nuts onto a threaded portion of a main rope connection rod. The main rope connection rod includes a rope socket to which an end of an elevator main rope is connected and a threaded portion connected to the rope socket. An inner nut and an outer nut that locks the position of the inner nut are threaded onto the threaded portion. The outer nut is disposed between the inner nut and the pair of split nuts in the longitudinal direction of the threaded portion. The disclosed method for adjusting tension of a main rope includes rotating the outer nut to move the outer nut toward the pair of split nuts, and applying a first rotational force in a first direction to the outer nut using a first tool and applying a second rotational force in a second direction opposite to the first direction to the pair of split nuts using a second tool, thereby preventing rotation of the main rope connection rod and the main rope by the outer nut and the pair of split nuts. The disclosed method for adjusting the tension of the main rope includes adjusting the tension of the main rope by rotating the inner nut using a third tool while preventing rotation of the main rope connecting rod and the main rope with an outer nut and a pair of split nuts, and locking the position of the inner nut in the longitudinal direction of the threaded portion using the outer nut. [Effects of the Invention]

[0007] According to the main rope connection rod rotation prevention jig and main rope tension adjustment method disclosed herein, the workability of the main rope tension adjustment work can be improved regardless of the type of rope socket. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a schematic side view of an elevator according to a first to third embodiments. [Figure 2] 2 is a schematic partially enlarged front view of an area II shown in FIG. 1 of the elevators according to the first to third embodiments. [Figure 3] FIG. 10 is a schematic plan view of a first tool of the anti-rotation jig for the main rope connection rod according to the first to third embodiments. [Figure 4] 10 is a schematic plan view of a pair of split nuts of the rotation prevention jig for the main rope connection rod of the first and second embodiments. FIG. [Figure 5] FIG. 10 is a schematic diagram of a second tool of the anti-rotation jig for the main rope connection rod according to the first to third embodiments. [Figure 6] FIG. 10 is a schematic partial side view of a second tool of the anti-rotation jig for the main rope connection rod according to the first to third embodiments. [Figure 7] FIG. 10 is a partially enlarged schematic cross-sectional view showing the forces acting on the outer nut and a pair of split nuts when the outer nut and a pair of split nuts are used to prevent rotation of the main rope connection rod. [Figure 8] FIG. 3 is a flowchart showing a method for adjusting the tension of the main rope according to the first embodiment. [Figure 9] FIG. 10 is a schematic partially enlarged side view showing the step of screwing a pair of split nuts onto the threaded portion of the main rope connection rod in the main rope tension adjusting method according to the first to third embodiments. [Figure 10] FIG. 10 is a schematic partially enlarged side view showing a step of moving an outer nut toward a pair of split nuts in the method for adjusting the tension of a main rope according to the first and third embodiments. [Figure 11] FIG. 10 is a partially enlarged schematic plan view showing the step of preventing rotation of the main rope connection rod using an outer nut and a pair of split nuts in the main rope tension adjusting method of the first and third embodiments. [Figure 12] FIG. 10 is a schematic partially enlarged side view showing a step of adjusting the tension of the main rope by rotating the inner nut in the method of adjusting the tension of the main rope according to the first and third embodiments. [Figure 13] 10 is a partially enlarged schematic side view showing a step of locking the position of an inner nut using an outer nut in the method of adjusting the tension of a main rope according to the first and third embodiments. FIG. [Figure 14] FIG. 2 is a schematic front view of an elevator according to a modification of the first to third embodiments. [Figure 15] 15 is a schematic partial enlarged front view of an area XV shown in FIG. 14 in an elevator according to a modification of the first to third embodiments. FIG. [Figure 16] FIG. 10 is a schematic plan view of a spacer of the anti-rotation jig for the main rope connection rod of the second embodiment. [Figure 17] FIG. 10 is a flowchart showing a method for adjusting the tension of the main ropes in the second embodiment. [Figure 18] 10 is a schematic partially enlarged side view showing a step of arranging a spacer between a pair of split nuts and an outer nut in the method for adjusting the tension of the main rope according to the second embodiment. FIG. [Figure 19] 10 is a schematic partially enlarged side view showing a step of moving the outer nut toward the pair of split nuts in the method for adjusting the tension of the main rope according to the second embodiment. FIG. [Figure 20] FIG. 11 is a schematic plan view of multiple pairs of split nuts of the rotation prevention jig for the main rope connection rod of the third embodiment. [Figure 21] FIG. 11 is a flowchart showing a method for adjusting the tension of the main ropes in the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] Hereinafter, embodiments of the present disclosure will be described. Note that the same reference numerals are used to designate the same components, and the description thereof will not be repeated.

[0010] Embodiment 1 A rotation prevention jig 30 for a main rope connection rod according to a first embodiment will be described with reference to Figures 1 to 7. The rotation prevention jig 30 for a main rope connection rod is a jig for preventing rotation of the main rope connection rod 20 and the main ropes 6 during tension adjustment work for the main ropes 6 of the elevator 1. An example of an elevator 1 will be described with reference to Figures 1 and 2.

[0011] (Elevator 1 configuration) Referring to Figure 1, elevator 1 is provided with machine room 2 and hoistway 3. Machine room 2 is located above hoistway 3. Hoistway 3 includes pit 3a. Pit 3a is located at the bottom of hoistway 3, and is the portion of hoistway 3 below the landing on the lowest floor.

[0012] 1, the elevator 1 is, for example, a 1:1 roping type elevator. The elevator 1 includes, for example, a car 4, a counterweight 5, a main rope 6, a hoist 7, a deflector 9, a landing 10, and guide rails 11 and 12.

[0013] One end of the main rope 6 is connected to the car 4. The other end of the main rope 6 is connected to the counterweight 5. A plurality of main ropes 6 may be used in the elevator 1. As shown in FIG. 2, in this embodiment, for example, two main ropes 6 are used.

[0014] The hoisting machine 7 includes a sheave 8 driven by a motor (not shown). The main rope 6 is wound around the sheave 8 and a deflector sheave 9. The main rope 6 moves as the sheave 8 rotates. The car 4 moves up and down the hoistway 3 while being guided by a guide rail 11. The counterweight 5 moves up and down the hoistway 3 in the opposite direction to the car 4 while being guided by a guide rail 12.

[0015] 2, the counterweight 5 includes a frame 15, a guide shoe 16, and a weight piece 17. The frame 15 includes an upper beam 15a. The upper beam 15a is provided with a through-hole into which the threaded portion 22 of the main rope connecting rod 20 is inserted. The guide shoe 16 is fixed to the frame 15. The guide shoe 16 is slidably engaged with the guide rail 12. The weight piece 17 is disposed within the frame 15.

[0016] In the elevator 1 shown in FIG. 1, the main rope connection rod 20 is connected to a first end of the main rope 6 connected to the car 4 and a second end of the main rope 6 connected to the counterweight 5. The main rope connection rod 20 (not shown) connected to the first end of the main rope 6 is configured similarly to the main rope connection rod 20 (see FIG. 2) connected to the second end of the main rope 6. Hereinafter, the main rope connection rod 20 connected to the second end of the main rope 6 will be described as an example with reference to FIG. 2.

[0017] The main rope connection rod 20 includes a rope socket 21 and a threaded portion 22. The rope socket 21 is connected to a second end of the main rope 6 of the elevator 1. The threaded portion 22 is connected to the rope socket 21. The rope socket 21 and the threaded portion 22 may be formed integrally, or may be mechanically connected to each other using a connecting pin or the like. The threaded portion 22 is inserted into a through-hole provided in the upper beam 15a from above the upper beam 15a.

[0018] The inner nut 23 and the outer nut 24 are screwed onto the threaded portion 22 from below the upper beam 15a. In the longitudinal direction of the threaded portion 22, the inner nut 23 is disposed between the rope socket 21 and the outer nut 24. In the longitudinal direction of the threaded portion 22, the outer nut 24 is disposed between the inner nut 23 and the end 22e of the threaded portion 22. In the longitudinal direction of the threaded portion 22, the outer nut 24 is disposed between the inner nut 23 and the split pin 25. The tension of the main rope 6 is adjusted by adjusting the position of the inner nut 23 in the longitudinal direction of the threaded portion 22. For example, tightening the inner nut 23 increases the tension of the main rope 6, and loosening the inner nut 23 decreases the tension of the main rope 6. The outer nut 24 prevents the inner nut 23 from loosening. The outer nut 24 prevents the inner nut 23 from rotating around the threaded portion 22, locking the position of the inner nut 23 in the longitudinal direction of the threaded portion 22.

[0019] A split pin 25 is inserted into an end 22e of the threaded portion 22 opposite to the rope socket 21. The split pin 25 prevents the inner nut 23 and the outer nut 24 from falling off the threaded portion 22.

[0020] The tension of the main ropes 6 is adjusted periodically. Specifically, an operator loosens the outer nut 24. The operator rotates the inner nut 23 to adjust the tension of the main ropes 6 to within a specified range. The operator tightens the outer nut 24 to prevent the inner nut 23 from rotating and lock the position of the inner nut 23. In this way, the tension of the main ropes 6 is adjusted. When the inner nut 23 is rotated to adjust the tension of the main ropes 6, the main rope connection rod 20 and the main ropes 6 may rotate together with the inner nut 23. Therefore, when the inner nut 23 is rotated, it is necessary to prevent the main rope connection rod 20 and the main ropes 6 from rotating. To prevent the main rope connection rod 20 and the main ropes 6 from rotating, a main rope connection rod rotation prevention jig 30 of this embodiment shown in Figures 3 to 6 is used.

[0021] (Configuration of the main rope connecting rod rotation prevention jig 30) 3 to 7, the main rope connection rod rotation prevention jig 30 of this embodiment includes a first tool 31, a pair of split nuts 45, and a second tool 32. The main rope connection rod rotation prevention jig 30 may further include holding members 40, 41.

[0022] 3, the first tool 31 is a tool for applying a rotational force to the outer nut 24 to move the outer nut 24 in the longitudinal direction of the threaded portion 22 of the main rope connection rod 20. The first tool 31 is, for example, a wrench.

[0023] 4, the pair of split nuts 45 includes a first split nut 46 and a second split nut 47. The pair of split nuts 45 is obtained by cutting a nut in half. For example, the pair of split nuts 45 can be obtained by cutting the nut along a diagonal line connecting two vertices of the nut in a plan view.

[0024] 7, the pair of split nuts 45 and the outer nut 24 are configured so that when a first rotational force in a first direction is applied to the outer nut 24 and a second rotational force in a second direction opposite to the first direction is applied to the pair of split nuts 45, the pair of split nuts 45 and the outer nut 24 press against each other in the longitudinal direction of the threaded portion 22. In other words, the outer nut 24 and the pair of split nuts 45 form a double nut structure.

[0025] Specifically, the inclined surface of the thread of the outer nut 24 is configured to be pressed by the first inclined surface 22a of the threaded portion 22 when a first rotational force in a first direction is applied to the outer nut 24. The inclined surfaces of the thread of the pair of split nuts 45 are configured to be pressed by the second inclined surface 22b of the threaded portion 22 that faces the first inclined surface 22a when a second rotational force in a second direction is applied to the pair of split nuts 45. When the outer nut 24 and the pair of split nuts 45 are threaded onto the threaded portion 22, the first inclined surface 22a faces in the longitudinal direction of the threaded portion 22, in the direction from the outer nut 24 to the pair of split nuts 45 (downward in FIG. 7), and the second inclined surface 22b faces in the longitudinal direction of the threaded portion 22, in the direction from the pair of split nuts 45 to the outer nut 24 (upward in FIG. 7).

[0026] 5 and 6, the second tool 32 is a tool for clamping the pair of split nuts 45 and applying a rotational force to the pair of split nuts 45. The pair of split nuts 45 are not fixed to the second tool 32 and are separable from the second tool 32. The second tool 32 is, for example, a vise 32a such as a clamp (see FIGS. 5 and 6), or locking pliers (not shown).

[0027] 5 and 6, the vise 32a includes a first arm 34, a second arm 35, a connecting portion 33, a pressing member 36, a threaded rod 37, a handle 38, and a support member 39.

[0028] The connection portion 33 connects the first arm 34 and the second arm 35 to each other. A through hole is provided in the end of the first arm 34 opposite the connection portion 33. The threaded rod 37 is inserted into the through hole. The pressing member 36 is connected to one end of the threaded rod 37. A handle 38 is fixed to the other end of the threaded rod 37. When an operator rotates the handle 38, the threaded rod 37 rotates and moves in the longitudinal direction of the threaded rod 37. The threaded rod 37 is rotatable relative to the pressing member 36. Even when the threaded rod 37 rotates, the pressing member 36 does not rotate. When the threaded rod 37 moves toward the support member 39, the pressing member 36 presses one of the pair of split nuts 45 (for example, the first split nut 46).

[0029] A support member 39 is fixed to the end of the second arm 35 opposite the connecting portion 33. The support member 39 supports the other of the pair of split nuts 45 (for example, the second split nut 47).

[0030] The holding members 40, 41 are attached to the second tool 32. The holding member 40, for example, engages with the pressing member 36 and is detachably attached to the pressing member 36. The holding member 41, for example, engages with the support member 39 and is detachably attached to the support member 39. The holding members 40, 41 hold a pair of split nuts 45. Specifically, the holding member 40 holds a first split nut 46, and the holding member 41 holds a second split nut 47. The holding members 40, 41 are, for example, L-shaped metal plates.

[0031] (How to adjust the tension of the main rope 6) 2 and 7 to 13, a method for adjusting the tension of the main ropes 6 according to this embodiment using the main rope connecting rod rotation prevention jig 30 according to this embodiment will be described.

[0032] As shown in Figure 2, the main rope connecting rod 20 includes a rope socket 21 and a threaded portion 22. A second end of the main rope 6 of the elevator 1 is connected to the rope socket 21. The threaded portion 22 is connected to the rope socket 21. An inner nut 23 and an outer nut 24 are screwed onto the threaded portion 22. In the longitudinal direction of the threaded portion 22, the inner nut 23 is disposed between the rope socket 21 and the outer nut 24. A split pin 25 is inserted into an end 22e of the threaded portion 22 opposite to the rope socket 21.

[0033] 8, the holding members 40, 41 are attached to the second tool 32 (step S1). For example, the holding member 40 is attached to the second tool 32 by engaging the holding member 40 with the pressing member 36 of the second tool 32. The holding member 41 is attached to the second tool 32 by engaging the holding member 41 with the support member 39 of the second tool 32.

[0034] 5 and 6, or may be locking pliers (not shown). When the second tool 32 is the vise 32a, the second tool 32 includes a first arm 34, a second arm 35, a connecting portion 33, a pressing member 36, a threaded rod 37, a handle 38, and a support member 39.

[0035] 8 and 9, a pair of split nuts 45 are screwed onto the threaded portion 22 of the main rope connection rod 20 (step S2). In the longitudinal direction of the threaded portion 22, the pair of split nuts 45 are arranged on the opposite side of the outer nut 24 from the inner nut 23. In the longitudinal direction of the threaded portion 22, the outer nut 24 is arranged between the inner nut 23 and the pair of split nuts 45.

[0036] Specifically, while holding the pair of split nuts 45 using the holding members 40, 41, the second tool 32 is moved so that the portion of the threaded portion 22 between the outer nut 24 and the end portion 22e is positioned between the first split nut 46 and the second split nut 47. The handle 38 is rotated to move the threaded rod 37 and the pressing member 36 toward the support member 39. The first split nut 46 is pressed against the threaded portion 22 by the pressing member 36 and is threaded onto the threaded portion 22. The second split nut 47, supported by the support member 39, is threaded onto the threaded portion 22. Because the pair of split nuts 45 are threaded onto the threaded portion 22 rather than a single nut, the pair of split nuts 45 can be threaded onto the threaded portion 22 without removing the split pin 25 from the threaded portion 22.

[0037] 8 and 10, the outer nut 24 is rotated to move the outer nut 24 toward the pair of split nuts 45 (step S3). For example, while using the third tool 48 to prevent the inner nut 23 from rotating, the outer nut 24 is rotated using the first tool 31 to loosen the outer nut 24. The outer nut 24 is further rotated using the first tool 31 to move the outer nut 24 until it comes into contact with the pair of split nuts 45. The third tool 48 is, for example, a wrench.

[0038] 8 and 11, the outer nut 24 and the pair of split nuts 45 prevent rotation of the main rope connection rod 20 and the main rope 6 (step S4). For example, an operator holds the first tool 31 and the second tool 32 in one hand and applies a first rotational force in a first direction to the outer nut 24 using the first tool 31, and applies a second rotational force in a second direction opposite to the first direction to the pair of split nuts 45 using the second tool 32. The outer nut 24 and the pair of split nuts 45 are tightened. The outer nut 24 and the pair of split nuts 45 form a double nut structure. The outer nut 24 and the pair of split nuts 45 prevent rotation of the main rope connection rod 20 and the main rope 6.

[0039] 7, the threaded portion 22 has a first inclined surface 22a and a second inclined surface 22b opposing the first inclined surface 22a. When a first rotational force is applied to the outer nut 24, the inclined surface of the thread of the outer nut 24 is pressed by the first inclined surface 22a of the threaded portion 22. When a second rotational force is applied to the pair of split nuts 45, the inclined surface of the thread of the pair of split nuts 45 is pressed by the second inclined surface 22b of the threaded portion 22 opposing the first inclined surface 22a. When the outer nut 24 and the pair of split nuts 45 are threaded onto the threaded portion 22, the first inclined surface 22a faces in the longitudinal direction of the threaded portion 22, in a direction from the outer nut 24 to the pair of split nuts 45, and the second inclined surface 22b faces in the longitudinal direction of the threaded portion 22, in a direction from the pair of split nuts 45 to the outer nut 24.

[0040] Therefore, by applying a first rotational force in a first direction to the outer nut 24 using the first tool 31 and applying a second rotational force in a second direction opposite to the first direction to the pair of split nuts 45 using the second tool 32, the pair of split nuts 45 and the outer nut 24 are pressed against each other in the longitudinal direction of the threaded portion 22. The main rope connection rod 20 is tightened by the outer nut 24 and the pair of split nuts 45, which form a double nut structure, and rotation of the main rope connection rod 20 and the main rope 6 is prevented.

[0041] 8 and 12, the tension of the main rope 6 is adjusted by rotating the inner nut 23 while preventing rotation of the main rope connection rod 20 and the main rope 6 using the outer nut 24 and the pair of split nuts 45 (step S5). For example, the worker holds the first tool 31 and the second tool 32 with one hand and applies a first rotational force in a first direction to the outer nut 24 using the second tool 32, and applies a second rotational force in a second direction opposite to the first direction to the pair of split nuts 45 using the first tool 31. Rotation of the main rope connection rod 20 and the main rope 6 is prevented. The worker holds the third tool 48 with the other hand and uses the third tool 48 to rotate the inner nut 23. The inner nut 23 moves in the longitudinal direction of the threaded portion 22. As a result, the tension of the main rope 6 is appropriately adjusted. Since one worker can operate the first tool 31, the second tool 32, and the third tool 48, the tension adjustment work of the main rope 6 can be performed by one worker.

[0042] 8 and 13, the position of the inner nut 23 in the longitudinal direction of the threaded portion 22 is locked using the outer nut 24 (step S6). Specifically, while using the third tool 48 to prevent rotation of the pair of split nuts 45, the outer nut 24 is rotated using the first tool 31. The outer nut 24 loosens. The outer nut 24 is further rotated using the first tool 31. The outer nut 24 moves toward the inner nut 23 and comes into contact with it. While using the third tool 48 to prevent rotation of the inner nut 23, the outer nut 24 is further tightened using the first tool 31. In this way, the outer nut 24 prevents rotation and loosening of the inner nut 23, locking the position of the inner nut 23. An appropriate tension is maintained in the main rope 6.

[0043] 8, the pair of split nuts 45 are removed from the main rope connection rod 20 (step S7). Specifically, the handle 38 is rotated to move the threaded rod 37 and the pressing member 36 in a direction away from the support member 39. The pressing member 36 moves away from the pair of split nuts 45. In this way, the pair of split nuts 45 and the second tool 32 are removed from the threaded portion 22 of the main rope connection rod 20.

[0044] (Variation)

[0045] The pair of split nuts 45 may be fixed to the second tool 32 by adhesive bonding, welding, or the like. Specifically, the first split nut 46 may be fixed to the pressing member 36 of the second tool 32 by adhesive bonding, welding, or the like, and the second split nut 47 may be fixed to the support member 39 of the second tool 32 by adhesive bonding, welding, or the like. When the pair of split nuts 45 are fixed to the second tool 32, the holding members 40, 41 may be omitted.

[0046] The pair of split nuts 45 may be magnetized. When the pair of split nuts 45 are screwed onto the threaded portion 22 of the main rope connection rod 20, the pair of split nuts 45 are attracted to the threaded portion 22. When the pair of split nuts 45 are magnetized, the holding members 40, 41 may be omitted.

[0047] The elevator 1 to which the main rope connecting rod rotation prevention jig 30 and the main rope 6 tension adjustment method of this embodiment and its modified example are applied is not limited to the elevator 1 shown in Figures 1 and 2, and may be, for example, an elevator 1 as shown in Figures 14 and 15.

[0048] 14, the elevator 1 is an elevator 1 (machine room-less elevator 1) that is not provided with a machine room 2. The elevator 1 shown in FIG. 14 is configured similarly to the elevator 1 shown in FIG. 1, but further includes pulleys 51 and 52, deflector pulleys 53 and 54, and a support plate 55.

[0049] The hoisting machine 7 is disposed at the bottom of the hoistway 3. The pulley 51 is provided at the bottom of the car 4. The pulley 52 is provided at the top of the counterweight 5. The deflector sheave 53 is disposed between the pulley 51 and the hoisting machine 7 and at the top of the hoistway 3. The deflector sheave 54 is disposed between the hoisting machine 7 and the pulley 52 and at the top of the hoistway 3. The main rope 6 is guided by the pulleys 51, 52, the deflector sheaves 53, 54 and the sheave 8 of the hoisting machine 7.

[0050] 14 and 15, both ends of the main rope 6 are connected to the rope sockets 21 of the main rope connecting rod 20. A support plate 55 and a spring bearing 57 are fixed to the building in which the elevator 1 is installed. Through holes are provided in the support plate 55 and the spring bearing 57. The spring bearing 57 is disposed above the support plate 55. A coil spring 56 is disposed between the support plate 55 and the spring bearing 57.

[0051] The threaded portion 22 of the main rope connection rod 20 is inserted into the through-hole of the support plate 55 and the through-holes of the coil spring 56 and spring holder 57. An inner nut 23 and an outer nut 24 are screwed onto the part of the threaded portion 22 that protrudes from the spring holder 57. A split pin 25 is inserted into the end 22e of the threaded portion 22 on the side opposite to the rope socket 21.

[0052] The effects of the main rope connecting rod rotation prevention jig 30 and the method for adjusting the tension of the main ropes 6 according to this embodiment will be described.

[0053] The main rope connection rod rotation prevention jig 30 of this embodiment includes a first tool 31, a pair of split nuts 45, and a second tool 32. The first tool 31 applies a first rotational force in a first direction to the outer nut 24 that screws onto the threaded portion 22 of the main rope connection rod 20. The main rope connection rod 20 is connected to the end of the main rope 6 of the elevator 1. The outer nut 24 locks the position of the inner nut 23, which can adjust the tension of the main rope 6. The second tool 32 clamps the pair of split nuts 45 that screw onto the threaded portion 22, and applies a second rotational force to the pair of split nuts 45 in a second direction opposite to the first direction.

[0054] While the inner nut 23 is rotated to adjust the tension of the main rope 6, the main rope connection rod 20 is tightened by the outer nut 24 and the pair of split nuts 45, which form a double-nut structure, preventing rotation of the main rope connection rod 20 and the main rope 6. Therefore, the process of preventing rotation of the main rope connection rod 20 and the main rope 6 can be performed independently of the rope socket 21. Furthermore, the worker can operate the first tool 31 and the second tool 32 with one hand to prevent rotation of the main rope connection rod 20 and the main rope 6 using the outer nut 24 and the pair of split nuts 45. The worker can operate the third tool 48 with the other hand to rotate the inner nut 23 and adjust the tension of the main rope 6. In other words, one worker can adjust the tension of the main rope 6. This improves the ease of adjusting the tension of the main rope 6, regardless of the type of rope socket 21.

[0055] In the anti-rotation jig 30 for the main rope connection rod of this embodiment, the pair of split nuts 45 and the outer nut 24 are configured so that when a first rotational force is applied to the outer nut 24 and a second rotational force is applied to the pair of split nuts 45, the pair of split nuts 45 and the outer nut 24 press against each other in the longitudinal direction of the threaded portion 22.

[0056] While the inner nut 23 is rotated to adjust the tension of the main rope 6, the main rope connection rod 20 is tightened by the outer nut 24 and the pair of split nuts 45, which form a double-nut structure, preventing rotation of the main rope connection rod 20 and the main rope 6. Therefore, the process of preventing rotation of the main rope connection rod 20 and the main rope 6 can be performed independently of the rope socket 21. Furthermore, the worker can operate the first tool 31 and the second tool 32 with one hand to prevent rotation of the main rope connection rod 20 and the main rope 6 using the outer nut 24 and the pair of split nuts 45. The worker can operate the third tool 48 with the other hand to rotate the inner nut 23 and adjust the tension of the main rope 6. In other words, one worker can adjust the tension of the main rope 6. This improves the ease of adjusting the tension of the main rope 6, regardless of the type of rope socket 21.

[0057] In the anti-rotation jig 30 for a main rope connection rod of this embodiment, the inclined surface of the thread of the outer nut 24 is configured to be pressed by the first inclined surface 22a of the threaded portion 22 when a first rotational force is applied to the outer nut 24. The inclined surfaces of the thread of the pair of split nuts 45 are configured to be pressed by the second inclined surface 22b of the threaded portion 22 that faces the first inclined surface 22a when a second rotational force is applied to the pair of split nuts 45. When the outer nut 24 and the pair of split nuts 45 are threaded onto the threaded portion 22, the first inclined surface 22a faces in the longitudinal direction of the threaded portion 22, in the direction from the outer nut 24 to the pair of split nuts 45, and the second inclined surface 22b faces in the longitudinal direction of the threaded portion 22, in the direction from the pair of split nuts 45 to the outer nut 24.

[0058] While the inner nut 23 is rotated to adjust the tension of the main rope 6, the main rope connection rod 20 is tightened by the outer nut 24 and the pair of split nuts 45, which form a double-nut structure, preventing rotation of the main rope connection rod 20 and the main rope 6. Therefore, the process of preventing rotation of the main rope connection rod 20 and the main rope 6 can be performed independently of the rope socket 21. Furthermore, the worker can operate the first tool 31 and the second tool 32 with one hand to prevent rotation of the main rope connection rod 20 and the main rope 6 using the outer nut 24 and the pair of split nuts 45. The worker can operate the third tool 48 with the other hand to rotate the inner nut 23 and adjust the tension of the main rope 6. In other words, one worker can adjust the tension of the main rope 6. This improves the ease of adjusting the tension of the main rope 6, regardless of the type of rope socket 21.

[0059] The main rope connection rod rotation prevention jig 30 of this embodiment is attached to the second tool 32 and further includes holding members 40 and 41 that hold a pair of split nuts 45 .

[0060] The holding members 40, 41 prevent the pair of split nuts 45 from falling off the threaded portion 22 of the main rope connection rod 20. In addition, the holding members 40, 41 can position the pair of split nuts 45 in the longitudinal direction of the threaded portion 22. Therefore, the workability of adjusting the tension of the main ropes 6 can be improved.

[0061] In the main rope connection rod rotation prevention jig 30 of this embodiment, the second tool 32 is a vice 32a. The vice 32a includes a pressing member 36 that presses one of a pair of split nuts 45, and a threaded rod 37 that is rotatable relative to the pressing member 36. The holding members 40, 41 are attached to the pressing member 36.

[0062] The pressing member 36 does not rotate even when the threaded rod 37 rotates. The holding members 40, 41 attached to the pressing member 36 can position the pair of split nuts 45 in the longitudinal direction of the threaded portion 22. This can improve the workability of adjusting the tension of the main rope 6.

[0063] In the main rope connection rod rotation prevention jig 30 of this embodiment, the pair of split nuts 45 are magnetized. The pair of split nuts 45 are attracted to the threaded portion 22.

[0064] Therefore, the holding members 40, 41 can be omitted, and the work of attaching the holding members 40, 41 to the second tool 32 becomes unnecessary. The workability of the work of adjusting the tension of the main rope 6 can be improved.

[0065] In the main rope connection rod rotation prevention jig 30 of this embodiment, the pair of split nuts 45 are separable from the second tool 32.

[0066] The diameter of the threaded portion 22 of the main rope connection rod 20 may vary depending on the model of elevator 1. A pair of split nuts 45 having an inner diameter corresponding to the diameter of the threaded portion 22 can be clamped using the second tool 32. The main rope connection rod rotation prevention jig 30 can be applied to the tension adjustment work of the main ropes 6 of multiple models of elevator 1. The workability of the tension adjustment work of the main ropes 6 can be improved.

[0067] In the main rope connection rod rotation prevention jig 30 of this embodiment, the pair of split nuts 45 are fixed to the second tool 32.

[0068] The holding members 40, 41 can be omitted, and the work of attaching the holding members 40, 41 to the second tool 32 becomes unnecessary. The workability of the work of adjusting the tension of the main rope 6 can be improved.

[0069] The method for adjusting the tension of the main ropes 6 in this embodiment includes threading a pair of split nuts 45 onto the threaded portion 22 of the main rope connection rod 20 (step S2). The main rope connection rod 20 includes a rope socket 21 to which an end of the main rope 6 of the elevator 1 is connected, and a threaded portion 22 connected to the rope socket 21. An inner nut 23 and an outer nut 24 that locks the position of the inner nut 23 are threaded onto the threaded portion 22. In the longitudinal direction of the threaded portion 22, the outer nut 24 is disposed between the inner nut 23 and the pair of split nuts 45. The method for adjusting the tension of the main ropes 6 in this embodiment includes rotating the outer nut 24 to move the outer nut 24 toward the pair of split nuts 45 (Step S3), and applying a first rotational force in a first direction to the outer nut 24 using the first tool 31 and applying a second rotational force in a second direction opposite to the first direction to the pair of split nuts 45 using the second tool 32, thereby preventing rotation of the main rope connection rod 20 and the main rope 6 by the outer nut 24 and the pair of split nuts 45 (Step S4).The method for adjusting the tension of the main ropes 6 in this embodiment includes rotating the inner nut 23 using the third tool 48 while preventing rotation of the main rope connection rod 20 and the main rope 6 by the outer nut 24 and the pair of split nuts 45 (Step S5), and locking the position of the inner nut 23 in the longitudinal direction of the threaded portion 22 using the outer nut 24 (Step S6).

[0070] While the inner nut 23 is rotated to adjust the tension of the main rope 6, the main rope connection rod 20 is tightened by the outer nut 24 and the pair of split nuts 45, which form a double-nut structure, preventing rotation of the main rope connection rod 20 and the main rope 6. Therefore, the process of preventing rotation of the main rope connection rod 20 and the main rope 6 can be performed independently of the rope socket 21. Furthermore, the worker can operate the first tool 31 and the second tool 32 with one hand to prevent rotation of the main rope connection rod 20 and the main rope 6 using the outer nut 24 and the pair of split nuts 45. The worker can operate the third tool 48 with the other hand to rotate the inner nut 23 and adjust the tension of the main rope 6. In other words, one worker can adjust the tension of the main rope 6. This improves the ease of adjusting the tension of the main rope 6, regardless of the type of rope socket 21.

[0071] In the method for adjusting the tension of the main rope 6 in this embodiment, a first rotational force is applied to the outer nut 24 and a second rotational force is applied to the pair of split nuts 45, so that the pair of split nuts 45 and the outer nut 24 are pressed against each other in the longitudinal direction of the threaded portion 22.

[0072] While the inner nut 23 is rotated to adjust the tension of the main rope 6, the main rope connection rod 20 is tightened by the outer nut 24 and the pair of split nuts 45, which form a double-nut structure, preventing rotation of the main rope connection rod 20 and the main rope 6. Therefore, the process of preventing rotation of the main rope connection rod 20 and the main rope 6 can be performed independently of the rope socket 21. Furthermore, the worker can operate the first tool 31 and the second tool 32 with one hand to prevent rotation of the main rope connection rod 20 and the main rope 6 using the outer nut 24 and the pair of split nuts 45. The worker can operate the third tool 48 with the other hand to rotate the inner nut 23 and adjust the tension of the main rope 6. In other words, one worker can adjust the tension of the main rope 6. This improves the ease of adjusting the tension of the main rope 6, regardless of the type of rope socket 21.

[0073] In the method for adjusting the tension of the main rope 6 of this embodiment, the threaded portion 22 has a first inclined surface 22a and a second inclined surface 22b opposing the first inclined surface 22a. When a first rotational force is applied to the outer nut 24, the inclined surface of the thread of the outer nut 24 is pressed by the first inclined surface 22a of the threaded portion 22. When a second rotational force is applied to the pair of split nuts 45, the inclined surface of the thread of the pair of split nuts 45 is pressed by the second inclined surface 22b of the threaded portion 22 opposing the first inclined surface 22a. When the outer nut 24 and the pair of split nuts 45 are screwed onto the threaded portion 22, the first inclined surface 22a faces in the longitudinal direction of the threaded portion 22, in the direction from the outer nut 24 to the pair of split nuts 45, and the second inclined surface 22b faces in the longitudinal direction of the threaded portion 22, in the direction from the pair of split nuts 45 to the outer nut 24.

[0074] While the inner nut 23 is rotated to adjust the tension of the main rope 6, the main rope connection rod 20 is tightened by the outer nut 24 and the pair of split nuts 45, which form a double-nut structure, preventing rotation of the main rope connection rod 20 and the main rope 6. Therefore, the process of preventing rotation of the main rope connection rod 20 and the main rope 6 can be performed independently of the rope socket 21. Furthermore, the worker can operate the first tool 31 and the second tool 32 with one hand to prevent rotation of the main rope connection rod 20 and the main rope 6 using the outer nut 24 and the pair of split nuts 45. The worker can operate the third tool 48 with the other hand to rotate the inner nut 23 and adjust the tension of the main rope 6. In other words, one worker can adjust the tension of the main rope 6. This improves the ease of adjusting the tension of the main rope 6, regardless of the type of rope socket 21.

[0075] In the method for adjusting the tension of the main ropes 6 in this embodiment, a split pin 25 is inserted into the end 22e of the threaded portion 22 opposite to the rope socket 21. Without removing the split pin 25 from the threaded portion 22, a pair of split nuts 45 are screwed onto the threaded portion 22 of the main rope connection rod 20.

[0076] Since there is no need to remove the split pin 25, the outer nut 24 and the inner nut 23 are prevented from falling off the threaded portion 22 of the main rope connecting rod 20. The workability of adjusting the tension of the main rope 6 can be improved.

[0077] The method for adjusting the tension of the main rope 6 according to this embodiment further includes attaching the holding members 40, 41 that hold the pair of split nuts 45 to the second tool 32 (step S1).

[0078] The holding members 40, 41 prevent the pair of split nuts 45 from falling off the threaded portion 22 of the main rope connection rod 20. In addition, the holding members 40, 41 can position the pair of split nuts 45 in the longitudinal direction of the threaded portion 22. Therefore, the workability of adjusting the tension of the main ropes 6 can be improved.

[0079] In the method for adjusting the tension of the main rope 6 according to the present embodiment, the second tool 32 is a vice 32a. The vice 32a includes a pressing member 36 that presses one of the pair of split nuts 45, and a threaded rod 37 that is rotatable relative to the pressing member 36. The holding members 40 and 41 are attached to the pressing member 36.

[0080] The pressing member 36 does not rotate even when the threaded rod 37 rotates. The holding members 40, 41 attached to the pressing member 36 can position the pair of split nuts 45 in the longitudinal direction of the threaded portion 22. This can improve the workability of adjusting the tension of the main rope 6.

[0081] In the method for adjusting the tension of the main rope 6 according to the present embodiment, the pair of split nuts 45 are magnetized. When the pair of split nuts 45 are screwed onto the threaded portion 22, the pair of split nuts 45 are attracted to the threaded portion 22.

[0082] Therefore, the holding members 40, 41 can be omitted, and the work of attaching the holding members 40, 41 to the second tool 32 becomes unnecessary. The workability of the work of adjusting the tension of the main rope 6 can be improved.

[0083] Embodiment 2 1 to 7 and 14 to 16, the main rope connection rod rotation prevention jig 30 of the second embodiment will be described. The main rope connection rod rotation prevention jig 30 of the second embodiment has a similar configuration to the main rope connection rod rotation prevention jig 30 of the first embodiment, but differs from the main rope connection rod rotation prevention jig 30 of the first embodiment mainly in the following points.

[0084] 16, the main rope connection rod rotation prevention jig 30 of this embodiment further includes a spacer 60. The spacer 60 is, for example, a split sleeve, and has a slit 61 formed in the spacer 60. Referring to FIGS. 18 and 19, the spacer 60 is disposed between the pair of split nuts 45 and the outer nut 24. The slit 61 can be expanded to fit the spacer 60 to the portion of the threaded portion 22 between the pair of split nuts 45 and the outer nut 24.

[0085] 17 to 19, a method for adjusting the tension of the main ropes 6 according to the second embodiment will be described. The method for adjusting the tension of the main ropes 6 according to the present embodiment comprises the same steps as the method for adjusting the tension of the main ropes 6 according to the first embodiment, but differs from the method for adjusting the tension of the main ropes 6 according to the first embodiment mainly in the following points.

[0086] 17 and 18, the method for adjusting the tension of the main rope 6 in this embodiment further includes, between step S2 and step S3, placing a spacer 60 between the pair of split nuts 45 and the outer nut 24 (step S7). With reference to Figs. 16 and 18, the spacer 60 is, for example, a split sleeve, and a slit 61 is provided in the spacer 60. The slit 61 is expanded, and the spacer 60 is attached to the portion of the threaded portion 22 between the pair of split nuts 45 and the outer nut 24. The spacer 60 is in contact with the pair of split nuts 45.

[0087] 17 and 19, in step S3, the outer nut 24 is rotated using the first tool 31 to move the outer nut 24 until the outer nut 24 contacts the pair of split nuts 45. The spacer 60 widens the gap between the outer nut 24 and the pair of split nuts 45. As a result, the gap between the first tool 31 and the second tool 32 widens.

[0088] 17 , in step S7 of this embodiment, the pair of split nuts 45 and the spacer 60 are removed from the main rope connection rod 20. Specifically, the slit 61 is pushed open to remove the spacer 60 from the threaded portion 22 of the main rope connection rod 20. The handle 38 is rotated to move the threaded rod 37 and the pressing member 36 in a direction away from the support member 39. The pressing member 36 moves away from the pair of split nuts 45. In this way, the spacer 60, the pair of split nuts 45, and the second tool 32 are removed from the threaded portion 22.

[0089] The anti-rotation jig 30 for the main rope connection rod and the method for adjusting the tension of the main rope 6 of this embodiment have the following effects in addition to the effects of the anti-rotation jig 30 for the main rope connection rod and the method for adjusting the tension of the main rope 6 of embodiment 1.

[0090] The main rope connection rod rotation prevention jig 30 of this embodiment further includes a spacer 60 disposed between the pair of split nuts 45 and the outer nut 24 .

[0091] The method for adjusting the tension of the main ropes 6 in this embodiment further includes arranging a spacer 60 between the pair of split nuts 45 and the outer nut 24 (step S7).

[0092] According to the main rope connection rod rotation prevention jig 30 and the method for adjusting the tension of the main ropes 6 of this embodiment, when the first tool 31 and the second tool 32 are used to prevent rotation of the main rope connection rod 20 and the main ropes 6 with the outer nut 24 and a pair of split nuts 45, mechanical interference between the first tool 31 and the second tool 32 can be prevented. In addition, the distance between the first tool 31 and the second tool 32 can be adjusted to a distance that makes it easy for an operator to grip the first tool 31 and the second tool 32 with one hand. This improves the ease of adjusting the tension of the main ropes 6.

[0093] Embodiment 3 The main rope connection rod rotation prevention jig 30 of the third embodiment will be described with reference to Figures 1 to 3, 5 to 7, 14, 15, and 20. The main rope connection rod rotation prevention jig 30 of the present embodiment has a similar configuration to the main rope connection rod rotation prevention jig 30 of the first embodiment, but differs from the main rope connection rod rotation prevention jig 30 of the first embodiment mainly in the following points.

[0094] Referring to FIG. 20, the main rope connection rod rotation prevention jig 30 of this embodiment includes a plurality of pairs of split nuts 45p having different inner diameters.

[0095] A method for adjusting the tension of the main ropes 6 according to the third embodiment will be described with reference to Fig. 21. The method for adjusting the tension of the main ropes 6 according to the present embodiment comprises the same steps as the method for adjusting the tension of the main ropes 6 according to the first embodiment, but differs from the method for adjusting the tension of the main ropes 6 according to the first embodiment mainly in the following points.

[0096] The method for adjusting the tension of the main rope 6 in this embodiment further includes selecting a pair of split nuts 45 having an inner diameter suitable for the diameter of the threaded portion 22 of the main rope connection rod 20 from multiple pairs of split nuts 45p having different inner diameters (step S9).

[0097] The anti-rotation jig 30 for the main rope connection rod and the method for adjusting the tension of the main rope 6 of this embodiment have the following effects in addition to the effects of the anti-rotation jig 30 for the main rope connection rod and the method for adjusting the tension of the main rope 6 of embodiment 1.

[0098] The diameter of the threaded portion 22 of the main rope connection rod 20 may differ depending on the model of elevator 1. Therefore, a pair of split nuts 45 having an inner diameter suitable for the diameter of the threaded portion 22 is selected from multiple pairs of split nuts 45p. The selected pair of split nuts 45 is screwed onto the threaded portion 22. In this way, the main rope connection rod rotation prevention jig 30 and the method for adjusting the tension of the main rope 6 of this embodiment can be applied to the tension adjustment work of the main rope 6 of multiple models of elevator 1. The workability of the tension adjustment work of the main rope 6 can be improved.

[0099] Various aspects of the present disclosure are summarized below as appendices. (Appendix 1) The first tool, A pair of split nuts; a second tool; the first tool applies a first rotational force in a first direction to an outer nut that threads onto a threaded portion of the main rope connection rod, the main rope connection rod being connected to an end of an elevator main rope, the outer nut locking the position of an inner nut that can adjust tension on the main rope; The second tool is a rotation prevention jig for a main rope connecting rod that clamps a pair of split nuts that thread onto the threaded portion and applies a second rotational force to the pair of split nuts in a second direction opposite to the first direction. (Appendix 2) the pair of split nuts and the outer nut are configured so that when a first rotational force is applied to the outer nut and a second rotational force is applied to the pair of split nuts, the pair of split nuts and the outer nut are pressed against each other in the longitudinal direction of the threaded portion; (Appendix 3) the inclined surface of the thread of the outer nut is configured to be pressed by the first inclined surface of the thread portion when a first rotational force is applied to the outer nut, the inclined surfaces of the threads of the pair of split nuts are configured to be pressed by second inclined surfaces of the threaded portions opposing the first inclined surfaces when a second rotational force is applied to the pair of split nuts, A rotation prevention jig for a main rope connection rod as described in Appendix 2, wherein when the outer nut and the pair of split nuts are screwed onto the threaded portion, the first inclined surface faces in the direction from the outer nut to the pair of split nuts in the longitudinal direction of the threaded portion, and the second inclined surface faces in the direction from the pair of split nuts to the outer nut in the longitudinal direction of the threaded portion. (Appendix 4) 4. The main rope connection rod rotation prevention jig according to any one of claims 1 to 3, further comprising a retaining member attached to the second tool and holding a pair of split nuts. (Appendix 5) The second tool is a vise, The vice includes a pressing member that presses one of the pair of split nuts, and a threaded rod that is rotatable relative to the pressing member, 5. The main rope connection rod rotation prevention jig according to claim 4, wherein the retaining member is attached to the pressing member. (Appendix 6) The pair of split nuts are magnetized, 4. A rotation prevention jig for a main rope connection rod according to any one of appendices 1 to 3, wherein the pair of split nuts are attached to the threaded portion by suction. (Appendix 7) 7. The anti-rotation jig for a main rope connection rod according to any one of appendices 1 to 6, wherein the pair of split nuts are separable from the second tool. (Appendix 8) 4. The anti-rotation jig for a main rope connection rod according to any one of appendices 1 to 3, wherein the pair of split nuts are fixed to the second tool. (Appendix 9) 9. The anti-rotation jig for a main rope connection rod according to any one of claims 1 to 8, further comprising a spacer disposed between the pair of split nuts and the outer nut. (Appendix 10) A plurality of pairs of split nuts including a pair of split nuts are provided, 9. A rotation prevention jig for a main rope connection rod according to any one of appendices 1 to 8, wherein the pairs of split nuts have different inner diameters. (Appendix 11) a pair of split nuts are threadedly engaged with a threaded portion of a main rope connecting rod, the main rope connecting rod including a rope socket to which an end of the elevator main rope is connected and a threaded portion connected to the rope socket, an inner nut and an outer nut for locking the position of the inner nut are threadedly engaged with the threaded portion, and the outer nut is disposed between the inner nut and the pair of split nuts in the longitudinal direction of the threaded portion; Rotating the outer nut to move the outer nut toward the pair of split nuts; applying a first rotational force in a first direction to the outer nut using a first tool and applying a second rotational force in a second direction opposite to the first direction to the pair of split nuts using a second tool, thereby preventing rotation of the main rope connection rod and the main rope by the outer nut and the pair of split nuts; While preventing rotation of the main rope connecting rod and the main rope by the outer nut and the pair of split nuts, rotate the inner nut using a third tool to adjust the tension of the main rope; and locking the position of the inner nut in the longitudinal direction of the threaded portion using an outer nut. (Appendix 12) The method for adjusting the tension of a main rope according to Appendix 11, wherein a first rotational force is applied to the outer nut and a second rotational force is applied to the pair of split nuts, thereby pressing the pair of split nuts and the outer nut against each other in the longitudinal direction of the threaded portion. (Appendix 13) The threaded portion has a first inclined surface and a second inclined surface opposite to the first inclined surface, the inclined surface of the thread of the outer nut is pressed by the first inclined surface when a first rotational force is applied to the outer nut, When a second rotational force is applied to the pair of split nuts, the inclined surfaces of the threads of the pair of split nuts are pressed by second inclined surfaces facing the first inclined surfaces, The method for adjusting the tension of a main rope described in Appendix 12, wherein, when the outer nut and the pair of split nuts are screwed onto the threaded portion, the first inclined surface faces in the direction from the outer nut to the pair of split nuts in the longitudinal direction of the threaded portion, and the second inclined surface faces in the direction from the pair of split nuts to the outer nut in the longitudinal direction of the threaded portion. (Appendix 14) A split pin is inserted into the end of the threaded part opposite the rope socket, 14. A method for adjusting tension of a main rope according to any one of appendices 11 to 13, wherein the pair of split nuts are screwed onto the threaded portion of the main rope connecting rod without removing the split pin from the threaded portion. (Appendix 15) 15. The method for adjusting the tension of a main rope according to any one of appendices 11 to 14, further comprising attaching a holding member that holds a pair of split nuts to the second tool. (Appendix 16) The second tool is a vise, The vice includes a pressing member that presses one of the pair of split nuts, and a threaded rod that is rotatable relative to the pressing member, 16. The method for adjusting tension of a main rope as described in Appendix 15, wherein the retaining member is attached to the pressing member. (Appendix 17) The pair of split nuts are magnetized, 15. The method for adjusting tension of a main rope according to any one of appendices 11 to 14, wherein when the pair of split nuts are screwed onto the threaded portion, the pair of split nuts are attracted to the threaded portion. (Appendix 18) 18. The method for adjusting the tension of a main rope according to any one of appendices 11 to 17, further comprising disposing a spacer between the pair of split nuts and the outer nut. (Appendix 19) A method for adjusting the tension of a main rope according to any one of appendices 11 to 18, comprising selecting a pair of split nuts having an inner diameter suitable for the diameter of the threaded portion from a plurality of pairs of split nuts having different inner diameters, and then screwing the pair of split nuts onto the threaded portion of the main rope connecting rod.

[0100] The presently disclosed embodiments 1-3 and their modifications should be considered to be illustrative in all respects and not restrictive. Unless inconsistent, at least two of the presently disclosed embodiments 1-3 and their modifications may be combined. The scope of the present disclosure is defined by the claims, not the above description, and is intended to include all modifications within the meaning and scope of the claims. [Explanation of symbols]

[0101] 1 elevator, 2 machine room, 3 hoistway, 3a pit, 4 car, 5 weight, 6 main rope, 7 hoist, 8 sheave, 9, 53, 54 deflector, 10 landing, 11, 12 guide rail, 15 frame, 15a upper beam, 16 guide shoe, 17 weight piece, 20 main rope connecting rod, 21 rope socket, 22 threaded portion, 22a first inclined surface, 22b second inclined surface, 22e end, 23 inner nut, 24 outer nut, 25 split pin, 30 anti-rotation jig, 31 first tool, 32 second tool, 32a vice, 33 connection portion, 34 first arm, 35 second arm, 36 pressing member, 37 threaded rod, 38 handle, 39 support member, 40, 41 holding member, 45 pair of split nuts, 45p Pairs of split nuts, 46 first split nut, 47 second split nut, 48 third tool, 51, 52 pulley, 55 support plate, 56 coil spring, 60 spacer, 61 slit.

Claims

1. A first tool; A pair of split nuts; a second tool; the first tool applies a first rotational force in a first direction to an outer nut that threads onto a threaded portion of a main rope connection rod, the main rope connection rod being connected to an end of an elevator main rope, the outer nut locking the position of an inner nut that can adjust tension on the main rope; The second tool clamps the pair of split nuts that thread onto the threaded portion and applies a second rotational force to the pair of split nuts in a second direction opposite to the first direction.

2. 2. The main rope connection rod rotation prevention jig according to claim 1, wherein the pair of split nuts and the outer nut are configured so that when the first rotational force is applied to the outer nut and the second rotational force is applied to the pair of split nuts, the pair of split nuts and the outer nut are pressed against each other in the longitudinal direction of the threaded portion.

3. an inclined surface of the thread of the outer nut is configured to be pressed by a first inclined surface of the thread portion when the first rotational force is applied to the outer nut, the inclined surfaces of the threads of the pair of split nuts are configured to be pressed by second inclined surfaces of the threaded portions that face the first inclined surfaces when the second rotational force is applied to the pair of split nuts, 3. The anti-rotation jig for a main rope connection rod according to claim 2, wherein, when the outer nut and the pair of split nuts are screwed onto the threaded portion, the first inclined surface faces in a direction from the outer nut toward the pair of split nuts in the longitudinal direction of the threaded portion, and the second inclined surface faces in a direction from the pair of split nuts toward the outer nut in the longitudinal direction of the threaded portion.

4. 2. The main rope connection rod anti-rotation jig according to claim 1, further comprising a retaining member attached to the second tool and configured to retain the pair of split nuts.

5. the second tool is a vice; The vise includes a pressing member that presses one of the pair of split nuts, and a threaded rod that is rotatable relative to the pressing member, 5. The main rope connection rod anti-rotation jig according to claim 4, wherein the retaining member is attached to the pressing member.

6. The pair of split nuts are magnetized, The rotation prevention jig for a main rope connection rod according to claim 1 , wherein the pair of split nuts are attracted to the threaded portion.

7. 5. The anti-rotation jig for a main rope connection rod according to claim 1 or claim 4, wherein the pair of split nuts are separable from the second tool.

8. The main rope connection rod rotation prevention jig according to claim 1 , wherein the pair of split nuts are fixed to the second tool.

9. 5. The anti-rotation jig for a main rope connection rod according to claim 1, further comprising a spacer disposed between the pair of split nuts and the outer nut.

10. A plurality of pairs of split nuts including the pair of split nuts are provided, 5. The rotation prevention jig for a main rope connection rod according to claim 1, wherein the pairs of split nuts have different inner diameters.

11. a pair of split nuts are threaded onto a threaded portion of a main rope connection rod, the main rope connection rod including a rope socket to which an end of an elevator main rope is connected and the threaded portion connected to the rope socket, an inner nut and an outer nut that locks the position of the inner nut are threaded onto the threaded portion, and the outer nut is disposed between the inner nut and the pair of split nuts in the longitudinal direction of the threaded portion; Rotating the outer nut to move the outer nut toward the pair of split nuts; applying a first rotational force in a first direction to the outer nut using a first tool and applying a second rotational force in a second direction opposite to the first direction to the pair of split nuts using a second tool, thereby preventing rotation of the main rope connection rod and the main rope by the outer nut and the pair of split nuts; Rotating the inner nut using a third tool to adjust the tension of the main rope while preventing the rotation of the main rope connecting rod and the main rope by the outer nut and the pair of split nuts; and locking the position of the inner nut in the longitudinal direction of the threaded portion using the outer nut.

12. 12. The method for adjusting the tension of a main rope according to claim 11, wherein the pair of split nuts and the outer nut are pressed against each other in the longitudinal direction of the threaded portion by applying the first rotational force to the outer nut and applying the second rotational force to the pair of split nuts.

13. the threaded portion has a first inclined surface and a second inclined surface facing the first inclined surface, the inclined surface of the thread of the outer nut is pressed by the first inclined surface when the first rotational force is applied to the outer nut, When the second rotational force is applied to the pair of split nuts, the inclined surfaces of the threads of the pair of split nuts are pressed by the second inclined surfaces facing the first inclined surfaces, 13. The method for adjusting the tension of a main rope according to claim 12, wherein, when the outer nut and the pair of split nuts are screwed onto the threaded portion, the first inclined surface faces in a direction from the outer nut to the pair of split nuts in the longitudinal direction of the threaded portion, and the second inclined surface faces in a direction from the pair of split nuts to the outer nut in the longitudinal direction of the threaded portion.

14. A split pin is inserted into the end of the threaded portion opposite the rope socket, 12. The method for adjusting tension of a main rope according to claim 11, wherein the pair of split nuts are threaded onto the threaded portion of the main rope connection rod without removing the split pin from the threaded portion.

15. The method for adjusting tension of a main rope according to claim 11 or claim 14, further comprising attaching a holding member for holding the pair of split nuts to the second tool.

16. the second tool is a vice; The vise includes a pressing member that presses one of the pair of split nuts, and a threaded rod that is rotatable relative to the pressing member, The method for adjusting tension of a main rope according to claim 15, wherein the holding member is attached to the pressing member.

17. The pair of split nuts are magnetized, The method for adjusting tension of a main rope according to claim 11 or claim 14, wherein the pair of split nuts are attracted to the threaded portions when the pair of split nuts are screwed onto the threaded portions.

18. The method for adjusting the tension of a main rope according to claim 11 or claim 14, further comprising disposing a spacer between the pair of split nuts and the outer nut.

19. A method for adjusting the tension of a main rope according to claim 11 or 14, comprising selecting a pair of split nuts having an inner diameter suitable for the diameter of the threaded portion from a plurality of pairs of split nuts having mutually different inner diameters, and then screwing the pair of split nuts onto the threaded portion of the main rope connection rod.

Images