JPH0912281A - Wire rope torsion eliminating method and working jig for it - Google Patents

Abstract

PURPOSE: To easily and safely eliminate unavoidable torsion generated on a wire rope of an overhead crane. CONSTITUTION: After a takeup drum 7 is fixed, a rope end 1c is connected and supported to a handrail 2a on a crane crab side through a connecting member 11 so connected as not to be relatively rotated and a wire rope supporting member 12 connected to the connecting member 11 so as to be freely rotated. After fixing of the rope end 1c to the drum 7 by a fixing tool 6 is released, the connecting member 11 is rotated in the torsion eliminating direction of the rope 1 by an operating spanner 14 by the specified amount in a state where the rotation in the torsion direction of the rope 1 is stopped by a supporting spanner 13. After the rope end 1c is fixed to the drum 7 by the fixing tool 6, a jig 10 of the connecting member 11 is removed. When the drum 7 is rotated, the torsion of the wire rope 1 is eliminated by being canceled by the torsion in the torsion eliminating direction applied to the wire rope 1 by the rotation of the connecting member 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an overhead crane or the like, which is wound around a fixed sheave on the side of a crane club and an elevating sheave on the side of a hanger and whose end is fixed by a fixture on the side of the crane club. A method for canceling the twist of the wire rope to eliminate the twist that occurs in the wire rope for lifting and lowering the lifting equipment fixed to the winding drum, and a jig for canceling the twist of the wire rope used when implementing this method. It is about.

[0002]

BACKGROUND OF THE INVENTION In overhead cranes and the like, FIGS.
As shown in FIG. 3, the middle part of the wire rope 1 for lifting the lifting device is hung between the fixed sheave 3 on the crane club 2 side and the lifting sheave 5 on the lifting device 4 side, and the end portion is fixed by the fixing device 6 to the crane. Although the wire rope 1 is fixed to the winding drum 7 on the side of the club 2 and the wire rope 1 is wound or rewound by the winding drum 7, the lifting tool 4 is moved up and down, but the wire rope 1 is twisted. When you are hanging, 4
7 does not take a proper and stable posture as shown in FIG.
As a result, the wire rope 1 is tilted or swung, and as a result, the wire rope 1 is damaged in a short period of time, the life of the wire rope is significantly reduced, and the operability of the crane is adversely affected.

By the way, the wire rope 1 generally has a plurality of strands 1 around the core rope 1a as shown in FIG.
It is made of a steel wire formed by twisting b ... Twisted at a predetermined pitch, and because of its structure, it is easy for twist to occur spontaneously. Therefore, the wire rope 1 is wound on the winding drum 7 and the sheaves 3, 5. When the wire rope 1 is guided between the two, the wire rope 1 is apt to be twisted (hereinafter referred to as “unavoidable twist”). The occurrence of such unavoidable twist and the above-mentioned problems associated therewith become more remarkable as the number of fixed sheaves and the number of lifting sheaves increase, that is, as the number of windings of the wire rope 1 increases, as illustrated in FIG. 8B. Become.

Therefore, in the prior art, in general, a worker on the crane club side and a worker on the ground side breathe together, and each worker twists the wire rope 1 in the direction opposite to the unavoidable twist while It is usual that the rope 1 is guided between the winding drum 7 and the sheaves 3, 5 so as not to inevitably twist.

However, since the wire rope 1 is made by twisting steel wires and is extremely hard and heavy as described above, the labor load of twisting in the opposite direction from the unavoidable twist is extremely large, and the wire rope 1 In addition to the fact that oil is attached to the product, which makes it easy for the hand to slip, if twisted in the direction opposite to the unavoidable twist, the reaction may cause the wire rope, etc. to hit the hand or body. There is. Therefore, it is extremely difficult for not only unskilled people but also skilled people to perform the above work safely and efficiently without causing the unavoidable twist of the wire rope 1, and it is difficult to take measures against it. Is the reality.

[0006]

SUMMARY OF THE INVENTION In view of such circumstances, the present invention makes it easy and safe to inevitably twist the wire rope stretched between the winding drum and the fixed sheave and the elevating sheave. It is an object of the present invention to provide a wire rope twist canceling method that can be solved, and a wire rope twist canceling jig that can preferably perform this method.

[0007]

SUMMARY OF THE INVENTION The present invention is a winding drum on the side of a crane club, which is wound around a fixed sheave on the side of a crane club and an elevating sheave on the side of a hanging tool and whose end is fixed by the fastener. The twist that is generated in the wire rope for lifting and lowering the lifting tool that is fixed to the hook is eliminated by using the twist elimination work jig that includes the connection member, the wire rope support member, the rotation support member, and the rotation operation member. In order to achieve the above object, in particular, a drum positioning step of fixing the winding drum in a state in which the wire rope is not wound and the end of the wire rope is located on the drum upper surface side. , A connecting member is connected to the end of the wire rope so as not to rotate relative to the wire rope, and the connecting member is connected to the connecting member so as to be relatively rotatable in a twisting direction of the wire rope or a reverse direction thereof. The wire rope support member connects and supports the end of the wire rope to the crane club side, and then the jig attachment step of releasing the fixing of the end to the take-up drum by the fixture, and the rotation support of the connection member. The member is rotatably supported only in the twist canceling direction of the wire rope while preventing the wire rope from rotating in the twisting direction, and is rotated by a predetermined amount in the twist canceling direction of the wire rope by the rotation operating member. Reverse twist applying step of fixing the end part to the winding drum with a fixing tool, and jig removal for removing the connecting member and the wire rope support member including the rotation supporting member and the rotation operating member from the end part of the wire rope and the crane club. By twisting the wire rope by rotating the winding drum and raising and lowering the lifting tool in the process. It by offsetting the twisting of the resolved direction twist given to the wire rope, the twisting eliminating step of eliminating, is made of.

Further, a jig for twisting work of a wire rope according to the present invention used for carrying out such a method is a detachable connecting member which is connected to an end portion of the wire rope so as not to rotate relative to the connecting member. A wire rope supporting member that is relatively rotatable and inseparably connected to each other, and that connects and supports the wire rope in a twistable state to the crane club side through the connecting member, and the connecting member in the twisting direction of the wire rope. A rotation supporting member that rotatably supports the anti-rotation in the opposite direction, that is, a twist canceling direction, and a rotation operating member that rotates the connecting member in the twist canceling direction of the wire rope.

[0009]

[Operation] By twisting the end of the wire rope in the twist canceling direction of the wire rope, the twist in the twist canceling direction given to the wire rope (hereinafter referred to as "canceling twist") occurs in the wire rope. If the same amount is set, the unavoidable twist is completely eliminated by fixing the end of the wire rope to the take-up drum with a fixture and then rotating the take-up drum to raise and lower the suspender. To be done. That is, the elimination twist imparted to the wire rope is mainly present only on the end side of the wire rope from the winding drum to the grounding hanger, and in the initial stage when the hanger is ground-cut. Although the unavoidable twist and the canceling twist are mixed in the wire rope, the lifting rope moves up and down to move the wire rope, and the canceling twist moves sequentially from the end side of the wire rope, and finally , Will be offset by the unavoidable twist. Therefore, the unavoidable twist of the wire rope can be completely eliminated by repeating the lifting and lowering of the lifting device a proper number of times.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The construction of the present invention will be specifically described below with reference to the embodiments shown in FIGS.

First, the construction of the twist canceling jig 10 for a wire rope according to the present invention will be described. That is, as shown in FIGS. 2 to 4, the wire rope twisting elimination jig 10 of this embodiment includes a connecting member 11, a wire rope support member 12, a rotation support member 13, and a rotation operation member 14. .

The connecting member 11, as shown in FIGS.
A hexagonal columnar main body 15, a pair of connecting portions 16 and 16 protruding from one end of the main body 15, a rotating shaft portion 17 protruding from the other end of the main body 15, and one connecting portion. 16 and a detachable connecting bolt 18 that can be screwed into a screw hole 16b formed in the other connecting portion 16 through a hole 16a formed in the other end of the wire rope 1. The fixed annular metal fitting 1c is inserted into and supported by the connecting bolt 18 so as to be detachably connected to the connecting portions 16, 16. That is, the connecting member 11 and the end of the wire rope 1 are connected so as to be relatively non-rotatable around their axes. The rotary shaft portion 17 has a T-shaped cross section with a flange portion 17a formed at the tip, and is concentrically fixed to the main body portion 15 by welding.

As shown in FIGS. 1 and 2, the wire rope support member 12 includes a main body portion 20 for rotatably and non-separably connecting the rotary shaft portion 17 of the connecting member 11 via a bearing 19 to the main body portion 20. A lid portion 21 that is screwed and welded,
A pair of connecting portions 22 and 22 protruding from the lid portion 21 and a screw hole 22b formed in the other connecting portion 22 penetrating through a hole 22a formed in the one connecting portion 22 are detachably attached. A connecting bolt 23 and a cremona rope 24 of an appropriate length that is connected to the connecting portions 22 and 22 by inserting and supporting the annular metal fitting 24a in the connecting bolt 23.
By tying the other end of the cremona rope 24 to an appropriate portion of the crane club 2 (for example, the handrail 2a), the wire rope 1 is connected to the crane club 2 via the connecting member 11.
It is designed so that it can be twisted to the side and connected and supported (see FIG. 1B).

The rotation support member 13 is a well-known ratchet spanner as shown in FIG.
5, a spanner portion 13a having a hexagonal hole that is relatively non-rotatably inserted and engaged, a lever portion 13b externally fitted to the spanner portion 13a so as to be relatively rotatable, and a ratchet mechanism interposed between both portions 13a, 13b. And 13c and 13d. That is, the ratchet mechanism includes both parts 13a, 13
Claw wheel 1 provided on one side of b (for example, spanner portion 13a)
3c and a claw 13d pivotally supported by the other side (for example, the lever portion 13b) so that the spanner portion 13a can move in a fixed direction with respect to the lever portion 13b (direction A in FIG. 3).
In the case of rotating the claw 13d, the claw 13d engages with the claw wheel 13c to prevent the rotation, and when the claw 13d is rotated in the opposite direction to the lever portion 13b (direction B in the figure), the claw 1
3d is configured to relatively move around the ratchet wheel 13c without being engaged with the ratchet wheel 13c, and its rotation is allowed. Therefore, according to the ratchet spanner (hereinafter, referred to as “support spanner”) 13 which is the rotation supporting member, as shown in FIG.
As shown in FIG. 3 and FIG.
The main body portion 1 of the connecting member 11 is arranged so that the direction in which the rotation is blocked with respect to b matches the twisting direction A of the wire rope 1.
5, the worker holds the lever 13b in his hand and fixes it, so that the connecting member 11 is twisted in the direction A
It can be rotatably supported in the opposite direction, that is, the twist elimination direction B, in a state in which the rotation to the direction is blocked.

As shown in FIG. 4, the rotating operation member 14 is the same ratchet spanner as the supporting spanner 13, and has a hexagonal hole having a hexagonal hole which is inserted into the body portion 15 of the connecting member 11 so as to be relatively non-rotatable. 14a, a lever portion 14b externally fitted to the spanner portion 14a so as to be relatively rotatable, and both portions 14
Ratchet mechanism 14c, 14 interposed between a and 14b
and d. That is, the ratchet mechanism has one of the two parts 14a and 14b (for example, the spanner part 14).
a) a claw wheel 14c and a claw 14d pivotally supported by the other side (for example, the lever portion 14b) so that the lever portion 14b can move in a fixed direction with respect to the spanner portion 14a (see FIG. 3). When rotating in the B direction)
When d is engaged with the ratchet wheel 14c, torque is transmitted from the lever portion 14b to the spanner portion 14a, and when the lever portion 14b is rotated in the opposite direction (direction A in the figure), the nail 14d Without engaging with the ratchet wheel 14c
By relatively moving around c, from the lever portion 14b to the spanner portion 1
The torque is not transmitted to 4a, and the lever portion 14b is configured to idle around the spanner portion 14a.
Therefore, according to the ratchet spanner (hereinafter, referred to as “operation spanner”) 14 which is the rotary operation member, torque is transmitted from the lever portion 14b to the spanner portion 14a by the spanner portion 14a as shown in FIGS. 2 and 4. Lever part 1
4b is inserted into and engaged with the main body portion 15 of the connecting member 11 so that the rotation direction of 4b coincides with the twist canceling direction B of the wire rope 1, and the operator swings the lever portion 14b to operate the connecting member. 11 can be rotated in the twist elimination direction B.

Next, the method for eliminating the twist of the wire rope according to the present invention will be concretely described by using the twist eliminating work jig 10 constructed as described above.

To eliminate the twist of the wire rope 1 by this method, the wire rope 1 is wound between the sheaves 3 and 5, and both ends thereof are fixed to the winding drum 7 by the fixing tools 6 and 6, that is, the wire. After the rope 1 replacement work or new tensioning work is once completed, it is performed through the following drum positioning step, jig attaching step, reverse twist applying step, jig removing step and twist eliminating step.

First, a drum positioning step is performed. That is, the winding drum 7 is fixed in a state where the wire rope 1 is not wound and one end of the wire rope 1 is positioned on the drum upper surface side, and the suspending tool 4 is grounded (see FIG. ), See FIG. 5).

Next, a jig mounting process is performed. That is, one end of the wire rope 1, that is, the annular metal fitting 1 c is connected to the connecting portions 16 and 16 of the connecting member 11 by the connecting bolt 18. Further, the cremona rope 24 of the wire rope support member 12 is attached to an appropriate place on the crane club 2 side, for example, the handrail 2a.
In addition, the connection member 11 and the wire rope support member 12 are held so as to be substantially horizontal, and the fixing of the one end of the wire rope 1 to the winding drum 7 by the fixture 6 is released (see FIG. B), see FIG. 2). At this time, the wire rope 1 has the connecting member 11 and the wire rope supporting member 1
Since it is connected to the handrail 2a via the fixing tool 6,
As before releasing the fixation by, the one end side part is about 45
It is held in a state of being pressed against the peripheral surface of the winding drum 7 at a winding angle of °. Before connecting the wire rope 1 to the connecting member 11, the support spanner 13 and the operating spanner 14 are previously engaged with the main body portion 15 of the connecting member 11 in the above-described state (FIGS. 2 to 4). reference).

Then, a reverse twist imparting step is performed. That is, the operator holds the support spanner 13 and the operation lever 1 in both hands.
The lever portion 13b of the operating lever 14 is swung while holding the lever portions 13b and 14b of No. 4 and holding the lever portion 13b of the support spanner 13 at a fixed position (see FIGS. 1C and 4). When the lever portion 14b of the operating spanner 14 is rotationally operated in the twist canceling direction B of the wire rope 1, torque is transmitted to the spanner portion 14a, the connecting member 11 is rotated in the same direction, and the wire rope 1 is rotated. It will be twisted in the direction opposite to the unavoidable twist that is occurring. On the other hand, connect the lever portion 14b of the operating spanner 14 to the wire rope 1
When it is returned to the twisting direction A, the torque is not transmitted from the lever portion 14b to the spanner portion 14a at this time, and the rotation of the connecting member 11 in the twisting direction A is prevented by the support spanner 13. Therefore, the connecting member 11 and the wire rope 1 are held as they are.
In other words, by swinging the lever portion 14a of the operating spanner 14 while holding the lever portion 13b of the support spanner 13, the twist canceling direction corresponding to the swing angle is applied to the one end side portion of the wire rope 1. A twist to B, that is, a release twist is imparted. At this time, the rotating operation of the connecting member 11 in the twist canceling direction B is performed such that the connecting member 11 is held in a horizontal state by its own weight of the wire rope 1, and the connecting spanner 13 is rotatable in the twist canceling direction B by the support spanner 13. In addition to being supported, the rotation of the connecting member 11 in the twisting direction A is prevented by the support spanner 13, and the one end side portion of the wire rope 1 is pressed against the winding drum 7. Since the wire rope 1 twisted in the twist canceling direction B is not likely to return to its original state, it can be safely performed. The wire rope 1 has the operation spanner in the twist canceling direction A. Lever part 1 of 14
The canceling twist corresponding to the rotation amount of 4b is surely imparted. The two spanners 13 and 14 can be operated by two workers in a shared manner, but can be safely and easily operated by one worker. Thus, when the swing operation of the operation spanner 14 is performed, the amount of canceling twist given to the wire rope 1 by this becomes an amount corresponding to about ½ of the unavoidable twist amount generated in the entire wire rope 1. It is repeated until. And wire rope 1
Then, at the time point when such a twist is given, the one end of the wire rope 1 is fixed to the winding drum 7 by the fixing tool 3 while the lever parts 13b and 14b of the spanners 13 and 14 are held. .

Next, a jig removing process is performed. That is,
While removing the Cremona rope 24 from the handrail 2a,
The connection bolt 18 is removed to release the connection between the connection member 11 and the wire rope 1. That is, the jig 10 is removed from one end of the wire rope 1 and the crane club 2. At this time, since one end of the wire rope 1 is fixed to the winding drum 7 by the fixture 6, the canceling twist imparted to the wire rope 1 is retained as it is.

Then, the jig attaching step, the reverse twist applying step and the jig removing step described above are repeated for the other end of the wire rope 1. In the reverse twist imparting step in this case, a canceling twist amount equal to the total unavoidable twist amount minus the cancel twist amount previously imparted to one end of the wire rope 1 is applied to the other end of the wire rope 1. To That is, the total of the amount of twists to be applied to both ends of the wire rope 1 is made to coincide with the amount of unavoidable twists occurring in the entire wire rope 1.

Finally, a twist elimination step is performed. That is, the winding drum 7 is rotated to wind up the wire rope 1 to cut the hanging tool 4, and then the winding drum 7 is further rotated normally and reversely to raise and lower the lifting tool 4 an appropriate number of times (see FIG. See D)). By the way, the canceling twist given to the wire rope 1 in the reverse twist imparting step and retained in the wire rope 1 in the jig removing step is mainly due to both ends of the wire rope 1 from the winding drum 7 to the hanging tool 4 grounded. It will be in the side part. Therefore,
At the initial stage of the twist elimination process in which the hanging tool 4 is ground,
Since the unavoidable twist and the canceling twist are mixed in the wire rope 1, the suspending tool 4 does not have a proper posture, for example, an inappropriate posture as shown in FIG. 7. However, when the lifting device 2 is repeatedly moved up and down after that, as the wire rope 1 moves, the elimination twist gradually shifts from the one end side portion to the other end side portion of the wire rope 1, and finally the unavoidable twisting. Will be offset. Therefore, by repeating the lifting and lowering of the suspending tool 2 an appropriate number of times, the unavoidable twist of the wire rope 1 is completely eliminated, and the suspending tool 4 takes the proper posture (see FIG. 6).

The present invention is not limited to the above-described embodiments, but can be appropriately changed and improved within the range not departing from the basic principle of the present invention.

For example, in the above embodiment, the wire rope 1
Although a canceling twist is given to each end of the wire rope so that the total of these canceling twists matches the unavoidable twist amount of the entire wire rope 1, the number of windings of the wire rope 1 is as shown in FIG.
When the wire rope 1 has a small amount of unavoidable twist as shown in (A), it is possible to apply a resolving twist only to one end of the wire rope 1. That is, after performing the work start preparation step, the jig attaching step, the reverse twist applying step, and the jig removing step are performed only on one end of the wire rope 1 to match the total unavoidable twist amount to the one end of the wire rope 1. The amount of twist to be eliminated is given and the twist elimination step is performed. In addition, as in the above-described embodiment, in the case of applying the twist for eliminating the twist to both ends of the wire rope 1, a pair of twist eliminating jigs 10 and 10 are used to attach the jig to each end of the wire rope 1. The step, the reverse twisting step, and the jig removing step may be simultaneously performed in parallel.

Further, in the above embodiment, the rotation support member 13
A well-known ratchet spanner is used as the rotation operating member 14, but the configuration is arbitrary. For example, the rotation supporting member 13 may be incorporated in the connecting member 11 (for example, the spanner portion 13a of the supporting spanner 13 is integrally formed with the connecting member 11). Further, the rotation support member 13 is fixed to an appropriate place on the side of the crane club 2 instead of being artificially held by the operator as described above (for example, the lever portion 13b of the support spanner 13 is appropriately handrailed or the like). It may be fixed by the fixing tool). The rotation operating member 14 may be a normal spanner or the like as long as it can rotate the connecting member 11 in the twist eliminating direction B. Further, the wire rope support member 12 connects the connecting member 11 so as to be rotatable relative to each other, and is configured as long as it holds the connecting member 11 in a constant posture in combination with the weight of the wire rope 1. Is arbitrary, and the means for connecting to the handrail 2a or the like on the crane club 2 side is not limited to the Cremona rope 24.

[0027]

As can be easily understood from the above description, according to the method for eliminating the twist of the wire rope of the present invention,
The unavoidable twist that occurs when the wire rope is stretched between the crane club side and the hanger side can be satisfactorily performed safely and with less labor burden by the work on the crane club side, and eventually the wire rope replacement work. Etc. can be performed extremely efficiently.

Further, according to the jig for eliminating twisting of the wire rope of the present invention, such a method can be carried out very suitably.

[Brief description of the drawings]

FIG. 1 is a side view of a main part showing in time series a method for eliminating twisting of a wire rope according to the present invention.

FIG. 2 is a vertical sectional side view showing an example of a twist canceling work tool for a wire rope used in this method.

FIG. 3 is a vertical sectional front view taken along the line III-III of FIG. 2;

FIG. 4 is a vertical sectional front view taken along the line IV-IV in FIG. 2;

FIG. 5 is a front view of a main part of the crane showing a grounding state of a lifting tool.

FIG. 6 is a front view corresponding to FIG. 5, showing a ground cutting state of the lifting tool when the wire rope is not twisted.

FIG. 7 is a front view corresponding to FIG. 5, showing a ground cutting state of the lifting tool when the wire rope is twisted.

FIG. 8 is a schematic perspective view showing an example of a wire rope hanging form.

FIG. 9 is a side view showing an example of a wire rope.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Wire rope, 2 ... Crane club, 3 ... Fixed sheave, 4 ... Lifting tool, 5 ... Lifting sheave, 6 ... Fixing tool, 7 ... Winding drum, 10 ... Wire rope twist elimination jig, 11 ... Connection member, 12 ... Wire rope support member, 1
3 ... Support spanner (rotary support member), 14 ... Operation spanner (rotary operation member), A ... Wire rope twisting direction, B
... Direction to eliminate twisting of the wire rope.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Akira Tsuyoshi 1-chome, Kawashima-dori, Mizushima, Kurashiki-shi, Okayama Prefecture (no address) Kawatetsu Machinery Co., Ltd.

Claims (2)

[Claims] 1. A lifting device for lifting and lowering, which is hung around a fixed sheave on the side of a crane club and a lifting sheave on the side of a lifting device, and whose end is fixed to a winding drum on the side of the crane club by a locking device. The twist generated in the wire rope is treated by using a twist eliminating work jig including a connecting member, a wire rope supporting member, a rotation supporting member, and a rotation operating member.
A method of solving the problem, in which the winding drum is fixed in a state in which the wire rope is not wound and the end of the wire rope is located on the drum upper surface side, and the winding rope is connected to the end of the wire rope. The members are connected so that they cannot rotate relative to each other, and the end of the wire rope is connected to the crane club side by a wire rope support member that is connected to the connecting member so as to be relatively rotatable in the twisting direction of the wire rope or the opposite direction, that is, the twist elimination direction. In a state where a jig is attached to the winding drum and the end of the end is fixed to the winding drum by a fixture, and the connecting member is prevented from rotating in the twisting direction of the wire rope by the rotation supporting member. It is rotatably supported only in the direction in which the wire rope is untwisted, and is rotated by a predetermined amount in the direction in which the wire rope is untwisted by the rotation operation member. The reverse twisting process of fixing the end of the wire rope to the take-up drum with a fixture, the jig removal process of removing the twist canceling jig from the end of the wire rope and the crane club, and the take-up drum. By twisting the wire rope up and down by rotating it to cancel the twist of the wire rope with the twist in the twist canceling direction given to the wire rope by the rotation of the connecting member, the twist canceling step of canceling the twist is performed. Characteristic method of eliminating twist of wire rope. 2. A wire rope twist elimination work jig used when the method of eliminating twist of a wire rope according to claim 1 is carried out, and is connected to an end portion of the wire rope so as not to rotate relative thereto. A detachable connecting member, and a wire rope support member that is connected to the connecting member in a relatively rotatable and inseparable manner and that connects and supports the wire rope in a twistable state to the crane club side via the connecting member, A rotation supporting member that rotatably supports the connecting member in a twist canceling direction, which is the opposite direction of the connecting member while preventing the wire rope from rotating in the twisting direction, and a rotation operating member that rotates the connecting member in the twist canceling direction of the wire rope. And a jig for eliminating twisting of a wire rope.