Strand Unwinding Tool

Abstract

To provide a tool for undoing strands capable of easing a load of a worker when undoing strands of a wire rope.SOLUTION: A tool 10 for undoing strands includes a cylindrical body 11, a cylindrical body 12, and guides 14. The cylindrical body 12 is supported by the cylindrical body 11 rotatably to the cylindrical body 11. The guides 14 partition a space formed inside the cylindrical body 12 into first spaces S1 for passing strands 22 undone from a rope core 21, and a second space S2 for passing the rope core 21 and strands 22 wound on the rope core 21.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] FIELD OF THE DISCLOSURE The present disclosure relates to tools used in unwinding wire rope strands. [Background technology]

[0002] Patent Document 1 describes a jig used to unwind a wire rope strand. The jig described in Patent Document 1 includes a disk-shaped body with multiple holes formed in it. An operator passes the strand through the holes and unwinds the strand while rotating the disk-shaped body. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-218757 Summary of the Invention [Problem to be solved by the invention]

[0004] When using the jig described in Patent Document 1, the worker rotates the disk-shaped body by hand to unwind the wire rope strand. To unwind the strand, the worker must repeatedly twist their wrist while exerting force. This places a heavy burden on the worker.

[0005] The present disclosure has been made to solve the above-mentioned problems, and an object of the present disclosure is to provide an unwinding tool that can reduce the burden on an operator when unwinding a wire rope strand. [Means for solving the problem]

[0006] The strand unwinding tool of the present disclosure comprises a first cylindrical body, a second cylindrical body supported on the first cylindrical body so as to be rotatable relative to the first cylindrical body around the central axis of the first cylindrical body, and a guide provided on the second cylindrical body that divides the space formed inside the second cylindrical body, when viewed from a direction along the central axis, into a first space for passing a strand to be unwound from a core rope of a wire rope and a second space for passing the core rope and the strand wound around the core rope. The guide is a curved plate-like member whose both ends are fixed to the second cylindrical body. The unwinding tool according to the present disclosure includes a first cylindrical body, a second cylindrical body supported on the first cylindrical body so as to be rotatable relative to the first cylindrical body around the central axis of the first cylindrical body, a guide provided on the second cylindrical body and dividing a space formed inside the second cylindrical body, as viewed along the central axis, into a first space for passing a strand to be unwound from a core rope of a wire rope and a second space for passing the core rope and the strand wound around the core rope, and a third cylindrical body provided on the first cylindrical body. The entire first cylindrical body is disposed in the space formed inside the third cylindrical body. The length of the third cylindrical body along the central axis is greater than the lengths of the first cylindrical body along the central axis and the second cylindrical body along the central axis. [Effects of the Invention]

[0007] By using the unwinding tool according to the present disclosure, the burden on the worker when unwinding the strands of a wire rope can be reduced. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 illustrates an example of an elevator device. [Figure 2] 1 is a side view showing an unwinding tool according to a first embodiment. [Figure 3] FIG. 3 is a cross-sectional view of FIG. 2 taken along line AA. [Figure 4] FIG. 4 is a view showing a cross section BB of FIG. 3. [Figure 5] FIG. 10 is a diagram for explaining how to use the unwinding tool. [Figure 6] FIG. 10 is a diagram for explaining how to use the unwinding tool. [Figure 7] FIG. 1 shows an example of two wire ropes that have been unstranded using an unstranding tool with two guides. [Figure 8] FIG. 4 is a diagram showing another example of the unwinding tool in the first embodiment. [Figure 9] FIG. 4 is a diagram showing another example of the unwinding tool in the first embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0009] The following detailed description will be given with reference to the drawings. Duplicate descriptions will be simplified or omitted as appropriate. In each drawing, the same reference numerals indicate the same or corresponding parts.

[0010] Embodiment 1 FIG. 1 is a diagram showing an example of an elevator apparatus. First, the elevator apparatus will be described with reference to FIG. 1. The elevator apparatus includes a car 1 and a counterweight 2. The car 1 moves up and down in a hoistway 3. The car 1 and the counterweight 2 are suspended from the hoistway 3 by a rope 4. The counterweight 2 moves up and down in the hoistway 3 in the direction opposite to the direction in which the car 1 moves. FIG. 1 shows an example of an elevator apparatus using a 1:1 roping system.

[0011] The rope 4 is wound around a hoist 5. The hoist 5 drives the car 1. A control device 6 controls the hoist 5. That is, the movement of the car 1 is controlled by the control device 6.

[0012] The rope 4 is a wire rope. In addition to the rope 4 that suspends the car 1, wire ropes are also used in the elevator system.

[0013] In elevator systems, wire ropes are replaced during renovation work, etc. When replacing a wire rope in an elevator system, a worker first connects a new wire rope to the wire rope that has been in use until then. Then, the worker retracts the old wire rope while letting out the new wire rope, thereby placing the new wire rope in the same position as the old wire rope.

[0014] To replace the wire rope in this manner, as described above, the worker must connect a new wire rope to the old wire rope. To connect the new wire rope to the old wire rope, the worker must unwind the wire rope strands. The following describes the tools used by the worker to unwind the wire rope strands.

[0015] Figure 2 is a side view showing the unwinding tool 10 in embodiment 1. Figure 3 is a view showing a cross section taken along line AA in Figure 2. Figure 4 is a view showing a cross section taken along line BB in Figure 3. The unwinding tool 10 includes a cylindrical body 11, a cylindrical body 12, a roller 13, and a guide 14.

[0016] The cylindrical body 11 is, for example, a cylindrical member having a central axis C. Hereinafter, as shown in FIG. 4, the direction along the central axis C will also be referred to as the X-axis direction.

[0017] The cylindrical body 12 is a cylindrical member having a diameter smaller than the diameter of the cylindrical body 11. FIGS. 2 to 4 show a preferred example in which the cylindrical body 12 has the same central axis as the central axis C of the cylindrical body 11. In the example shown in FIGS. 2 to 4, the length of the cylindrical body 12 in the X-axis direction is the same as the length of the cylindrical body 11 in the X-axis direction. Furthermore, the cylindrical body 12 is arranged so that one end face 12a is flush with one end face 11a of the cylindrical body 11. The entire cylindrical body 12 is arranged in the space formed inside the cylindrical body 11.

[0018] The rollers 13 are disposed between the cylindrical body 11 and the cylindrical body 12. Due to the presence of the rollers 13, the cylindrical body 12 is supported by the cylindrical body 11 so as to be rotatable relative to the cylindrical body 11 about the central axis C. In the example shown in FIGS. 2 to 4, the cylindrical body 12 is rotatable in both directions relative to the cylindrical body 11.

[0019] The guide 14 is provided on the cylindrical body 12. In the example shown in FIGS. 2 to 4, the guide 14 is a convexly curved plate-like member. For example, the guide 14 is arranged so that its central portion protrudes toward the central axis C by having both ends fixed to the inner circumferential surface of the cylindrical body 12. The length of the guide 14 in the X-axis direction is shorter than the length of the cylindrical body 12 in the X-axis direction. Furthermore, the guide 14 is arranged so that one end face 14a is flush with the end face 12a of the cylindrical body 12. The entire guide 14 is arranged in a space formed inside the cylindrical body 12. FIGS. 2 to 4 show an example in which the unwinding tool 10 includes three guides 14.

[0020] Next, a method for unwinding a wire rope strand using the unwinding tool 10 will be described with reference to Figures 5 and 6. Figures 5 and 6 are diagrams for explaining how to use the unwinding tool 10. Figure 5 is a cross-sectional view corresponding to Figure 3. Figure 6 is a view corresponding to Figure 2.

[0021] 5 and 6, the wire rope 20 includes a core rope 21 and six strands 22. That is, the wire rope 20 is formed by winding the six strands 22 around the core rope 21.

[0022] 3 and 5, the guide 14 divides the space formed inside the cylindrical body 12 into a first space S1 and a second space S2 when viewed from the X-axis direction. The first space S1 is a space for passing the strand 22 to be unwound from the core rope 21 of the wire rope 20. The second space S2 is a space for passing the core rope 21 of the wire rope 20 and the strand 22 wound around the core rope 21. In other words, the strand 22 that is not unwound from the core rope 21 passes through the second space S2.

[0023] 5 and 6 show an example of unwinding three of the strands 22 included in the wire rope 20 from the core rope 21. Inside the cylindrical body 12, one first space S1 is formed by one guide 14. As shown in FIG. 5, the worker first inserts the tip of the wire rope 20 into the space formed inside the cylindrical body 12 so that one strand 22 is placed in each first space S1. The core rope 21 and the remaining three strands 22 not placed in the first space S1 are placed in the second space S2.

[0024] When the wire rope 20 is placed relative to the unwinding tool 10 as shown in Figure 5, the worker grasps the cylindrical body 11 and moves the unwinding tool 10 straight along the wire rope 20. In the example shown in Figure 6, the worker moves the unwinding tool 10 in the direction D.

[0025] A guide 14 is arranged between the core rope 21 and the strand 22 arranged in the first space S1. Therefore, when the unwinding tool 10 moves in the direction D, the guide 14 bites into the gap between the core rope 21 and the strand 22, and the strand 22 is peeled off from the core rope 21.

[0026] Furthermore, the cylindrical body 12 rotates around the central axis C relative to the cylindrical body 11. Therefore, when the worker moves the unwinding tool 10 in the direction D, the cylindrical body 12 is guided by the strand 22 arranged in the first space S1 and rotates inside the cylindrical body 11 in accordance with the twist of the strand 22. At this time, the worker does not need to repeatedly perform operations such as twisting the wrist. The worker simply needs to grasp the cylindrical body 12 and move the unwinding tool 10 straight in the direction D. This reduces the burden on the worker when unwinding the strand 22 of the wire rope 20.

[0027] The strand 22 arranged in the second space S2 passes through the second space S2 together with the core rope 21. The strand 22 not arranged in the first space S1 remains wound around the core rope 21 even after passing through the unwinding tool 10.

[0028] As described above, the cylindrical body 12 rotates in both directions relative to the cylindrical body 11. Therefore, to remove the unwinding tool 10 from the wire rope 20, the worker simply moves the unwinding tool 10 straight in the opposite direction along the wire rope 20. In the example shown in Figure 6, the worker can remove the unwinding tool 10 from the wire rope 20 by moving the unwinding tool 10 in the E direction.

[0029] 2 to 6 show an example in which the unwinding tool 10 includes three guides 14. In other examples, the unwinding tool 10 may include only one or two guides 14. The unwinding tool 10 may include four or more guides 14.

[0030] For example, if the wire rope 20 has eight strands 22, the worker can unwind the strands 22 using the unwinding tool 10 having two guides 14. In such a case, two first spaces S1 are formed inside the cylindrical body 12. The worker simply places two adjacent strands 22 in one first space S1, and then places two adjacent strands 22 diagonally opposite the two strands 22 in the other first space S1.

[0031] 7 is a diagram showing an example of two wire ropes 20 in which a strand 22 has been unwound using an unwinding tool 10 having two guides 14. In the explanation of FIG. 7, in order to distinguish between the two wire ropes 20, the letter a is added after the reference symbol for one wire rope 20, and the letter b is added after the reference symbol for the other wire rope 20.

[0032] For example, wire rope 20a is an old rope 4 in which eight strands 22a are wound around core rope 21a. Wire rope 20b is a new rope 4 in which eight strands 22b are wound around core rope 21b.

[0033] Figure 7 shows a state in which four strands 22a have been unwound using the unwinding tool 10, and then the four strands 22a have been cut from their bases. As a result, the core rope 21a is exposed in a spiral shape at the tip of the wire rope 20a. Figure 7 also shows a state in which four strands 22b have been unwound using the unwinding tool 10, and then the core rope 21b and the other four strands 22b have been cut, leaving the four strands 22b.

[0034] To connect wire rope 20a to wire rope 20b, first, the end face of core rope 21b is aligned with the end face of core rope 21a, and wire rope 20a and wire rope 20b are arranged in a straight line. Then, strand 22b is wound around the exposed part of core rope 21a, thereby forming wire rope 20a and wire rope 20b into a single wire rope.

[0035] Figure 8 is a diagram showing another example of the unwinding tool 10 in embodiment 1. Figure 8 is a cross-sectional view corresponding to Figure 4. In the example shown in Figure 8, the unwinding tool 10 further includes a cylindrical body 15 in addition to the cylindrical body 11, the cylindrical body 12, the roller 13, and the guide 14.

[0036] The cylindrical body 15 is a cylindrical member having a diameter larger than the diameter of the cylindrical body 11. The cylindrical body 15 is provided in the cylindrical body 11. FIG. 8 shows a preferred example in which the cylindrical body 15 has the same central axis as the central axis C of the cylindrical body 11. In the example shown in FIG. 8, the length L1 of the cylindrical body 15 in the X-axis direction is larger than the lengths of the cylindrical body 11 and the cylindrical body 12 in the X-axis direction. Furthermore, the cylindrical body 15 is arranged so that one end face 15a is flush with one end face 11a of the cylindrical body 11. The cylindrical body 11 is arranged entirely in a space formed inside the cylindrical body 15.

[0037] The cylindrical body 15 is a member provided to make it easier for the worker to hold the unwinding tool 10. In the example shown in FIG. 8, even if the length of the cylindrical body 11 in the X-axis direction cannot be increased due to structural constraints or other reasons, a sufficient gripping margin can be ensured. Furthermore, when the unwinding tool 10 includes the cylindrical body 15, it is desirable that the guide 14 be positioned close to a plane including the end face 15a. For example, as shown in FIG. 8, if the end face 14a is positioned flush with the end face 15a, the worker can easily pass the strand 22 to be unwound through the first space S1.

[0038] FIG. 9 is a diagram showing another example of the unwinding tool 10 in the first embodiment. FIG. 9 is a cross-sectional view corresponding to FIG. 4. In the example shown in FIG. 9, the function of the cylindrical body 15 in FIG. 8 is realized by the cylindrical body 11. For example, the length L2 of the cylindrical body 11 in the X-axis direction is greater than the length of the cylindrical body 12 in the X-axis direction. If the length of the cylindrical body 11 in the X-axis direction can be increased, a configuration such as that shown in FIG. 9 may be adopted without including the cylindrical body 15.

[0039] In the present embodiment, an example has been described in which the first space S1 is formed by the cylindrical body 12 and the guide 14. That is, in the example shown in the present embodiment, the strand 22 arranged in the first space S1 is surrounded by a part of the cylindrical body 12 and the guide 14. As another example, the first space S1 may be formed only by the guide 14.

[0040] In this embodiment, an example has been described in which the unwinding tool 10 is used for a wire rope 20 used in an elevator apparatus. It goes without saying that the unwinding tool 10 may also be used for wire ropes used in apparatuses other than elevator apparatuses. [Explanation of symbols]

[0041] 1 car, 2 counterweight, 3 hoistway, 4 rope, 5 hoisting machine, 6 control device, 10 unwinding tool, 11 cylindrical body, 11a end face, 12 cylindrical body, 12a end face, 13 roller, 14 guide, 14a end face, 15 cylindrical body, 15a end face, 20 wire rope, 21 core rope, 22 strand

Claims

1. A first cylindrical body; a second cylindrical body supported by the first cylindrical body so as to be rotatable relative to the first cylindrical body around a central axis of the first cylindrical body; a guide provided on the second cylindrical body, which divides a space formed inside the second cylindrical body, as viewed from a direction along the central axis, into a first space for passing a strand to be unwound from a core cord of the wire rope and a second space for passing the core cord and the strand wound around the core cord; Equipped with The guide is a curved plate-shaped member having both ends fixed to the second cylindrical body.

2. The unwinding tool according to claim 1 , wherein the second cylindrical body is entirely disposed in a space formed inside the first cylindrical body.

3. Further, a third cylindrical body is provided on the first cylindrical body, The first cylindrical body is entirely disposed in a space formed inside the third cylindrical body, 3. The strand unwinding tool according to claim 1, wherein a length of the third cylindrical body in a direction along the central axis is greater than a length of the first cylindrical body in a direction along the central axis and a length of the second cylindrical body in a direction along the central axis.

4. The unwinding tool according to claim 1 or 2, wherein the length of the first cylindrical body in the direction along the central axis is greater than the length of the second cylindrical body in the direction along the central axis.

5. The unwinding tool according to claim 1 , wherein the length of the second cylindrical body in the direction along the central axis is greater than the length of the guide in the direction along the central axis.

6. The unwinding tool according to claim 1 , wherein the second cylindrical body is rotatable in both directions about the central axis relative to the first cylindrical body.

7. A first cylindrical body; a second cylindrical body supported by the first cylindrical body so as to be rotatable relative to the first cylindrical body around a central axis of the first cylindrical body; a guide provided on the second cylindrical body, which divides a space formed inside the second cylindrical body, as viewed from a direction along the central axis, into a first space for passing a strand to be unwound from a core cord of the wire rope and a second space for passing the core cord and the strand wound around the core cord; a third cylindrical body provided on the first cylindrical body; Equipped with The first cylindrical body is entirely disposed in a space formed inside the third cylindrical body, A strand unwinding tool in which the length of the third cylindrical body in the direction along the central axis is greater than the length of the first cylindrical body in the direction along the central axis and the length of the second cylindrical body in the direction along the central axis.

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