JPH10203751A - Main rope replacing method of 2:1 roping elevator and device thereof - Google Patents

Abstract

PROBLEM TO BE SOLVED: To recover an existing main rope simply by attaching a rope socket and a first simple rod to the other end of a newly installed main rope, then hoisting it up to a machine room, and installing the first simple rod on a floor of the machine room. SOLUTION: A winch 8 is wound up to cut a first cutting section 1B of a main rope 1, and the main rope 1 from the first cutting section 1B to a second cutting section 1C is lowered and is wound around a drum 10 installed on a floor FB at the lowest story. Next, a drum around which a newly installed main rope 1a on an end part of which a rope socket and a first simple rod 2A are attached in advance is wound is installed on a floor FA at the uppermost story, this newly installed main rope 1a is hoisted up to a machine room 3 by the winch 8 and a winch rope 8A through a cage 5, and the first simple rod 2A is installed on a floor of the machine room 3. Consequently, it is possible to recover the existing main rope 1 simply.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for exchanging main ropes of a 2: 1 roping elevator.

[0002]

2. Description of the Related Art Conventionally, a winch is used to replace an elevator main line from an existing main line to a new main line. As a main rope method of an elevator using this winch, both ends of the main rope are tied up at the upper part, and the main ropes are hung over hanging cars provided on the car side and the counterweight side respectively, and lifted by driving the hoist. Raising and lowering the car in the street 2:
(1) In the method for exchanging main ropes of a roping elevator, a first conductive plate extending from a floor surface of an upper floor to a substantially central portion in a hoistway, and a second conductive plate extending from a floor surface of a lower floor to an upper end surface of a counterweight. To temporarily install a rope winding machine and a rope unwinding machine on the first conductive plate, and to collect the old main policy and send the new main policy by temporary relay of the new and old main ropes. Done 2:
1 Roping elevator main rope replacement method
No. 2,820,080.

[0003]

In the above prior art, the new main rope is connected to the existing main rope so that the new main rope is wound around the existing main rope, so that the cutting of the existing main rope is unnecessary. However, there was a problem that the weight of the existing main rope wound up became large, and the recovery of the existing main rope required equipment and labor.

[0004] In addition, by connecting the new main line and the existing main line, the new and existing main lines move around in the hoistway and move around the hoistway due to the rotational force generated when the twist of either the new main line or the existing main line returns. There is a problem that the equipment in the hoistway may be damaged by colliding with the internal equipment, or the building and workers' clothes may be soiled and the workers may be damaged when winding up and collecting the dirty and twisted existing main rope. there were.

[0005] Further, since the new main rope has one end connected to the existing main rope and the other end wound around the main rope drum, the twist of the new main rope cannot be completely returned. There is a problem in that a difference in main rope tension occurs due to a difference in the degree of twist return between a plurality of main ropes, and a difference in wear occurs in a groove of a sheave around which the main rope is wound.

A first object of the present invention is to provide a method of exchanging main ropes of a 2: 1 roping elevator in which existing main ropes can be easily collected.

A second object of the present invention is to prevent damage to equipment in a hoistway and soiling of a building during replacement of a main cable,
It is an object of the present invention to provide a main rope exchanging device for a 2: 1 roping elevator that can untwist a new main rope.

[0008]

In order to achieve the first object, the present invention provides a machine room having a first thimble rod and a second thimble rod connected to both ends of a main rope at the floor. The main rope, which is installed via a spring and is suspended from the first sibble rod and the hoist pulley, is wound around a car pulley provided above the car, and the hoist pulley and the second thimble rod A method of exchanging main ropes of a 2: 1 roping elevator, wherein the main ropes suspended from the ropes are wound around a counterweight pulley provided above the counterweight.
While supporting the counterweight at the bottom of the hoistway, suspending the car at the top of the hoistway, and fixing it so that the tension of the existing main rope is invalid, at least one
In the method of replacing main ropes of a 2: 1 roping elevator, which is replaced one by one, after the tension of the existing main ropes is invalidated in a state where the car is stopped near the top floor, one of the existing main ropes is replaced with the main rope. Cut at the first cutting point on the upper part of the counterweight pulley, screw the top of the second thimble rod to a rope hanger attached to the winch, and screw the top part of the second thimble rod from the first cutting point to the second thimble rod. The existing main rope is suspended by the winch and collected, and the existing main rope between the counterweight pulley and the hoist pulley is gripped by a main rope holding device in the vicinity of the hoist pulley. A main rope is cut at a second cutting point above the portion, and the rope hanging device is attached to the main rope holding device, and the existing main rope from the first cutting point to the second cutting point is separated by the winch. Hanging and turning And cutting the existing main rope hanging from the first thimble rod to the pulley on the car at a third cutting point substantially at the same position as the second cutting point of the existing main rope, and moving from the second cutting point to the third cutting point. After the existing main ropes and the first main ropes from the first thimble rod to the third cutting point have been pulled up to the machine room and collected, the new main ropes are then placed in the car from the top floor. After being wound around the pulley on the car through a rescue exit provided on the ceiling and raised to the machine room, a rope socket is attached to one end of the newly installed main rope, and then wound around the pulley of the hoisting machine, the main rope other than the relevant main rope is wound. The guide is moved down to the hoistway, wound around the counterweight pulley, and the second thimble rod is attached to the rope socket, and the second simb is attached to the rope suspender attached to the winch. A second rod was screwed up and lifted in the machine room, the second thimble rod was installed on the machine room floor, and the other end of the new main rope was attached with the rope socket and the first thimble rod. Then, the first thimble rod is lifted up in the machine room and installed on the machine room floor.

According to such a method, the existing main rope is cut at the first cut portion above the counterweight pulley, and the second main cut above the existing main rope between the car pulley and the hoist pulley held by the main rope holding device. A third portion of the existing main rope hanging from the first thimble rod to the car pulley at the same position as the second cut portion.
The cutting is performed at the cutting point, and the existing main rope is collected every time the cutting is performed from the first cutting point to the third cutting point. That is, the parts from the first cutting point to the second thimble rod are suspended by a winch and collected. From the 1st cutting point to the 2nd cutting point, it is suspended and collected by a winch, and after the 2nd cutting point to the 3rd cutting point and the 1st thimble rod to the 3rd cutting point are pulled up to the machine room and collected, The new main rope is arranged while being guided by main ropes other than the main rope, and the first thimble rod is mounted on the machine room floor after the second thimble rod is mounted. As described above, since the existing main rope is cut at three places, the transportation after the main rope collection can be performed manually, and special equipment for transporting heavy objects is not required.

In order to achieve the second object,
The present invention relates to a first section connected to both ends of a main rope on the floor of a machine room.
The thimble rod and the second thimble rod are installed via a spring, and the first thimble rod and the main rope hung from the hoist pulley are wound around a car pulley provided at an upper part of a car, and A main rope exchanging device for a 2: 1 roping elevator, wherein the main rope hung from a hoisting machine pulley and the second thimble rod is wound around a counterweight pulley provided above a counterweight. The weight is supported at the bottom of the hoistway, and the car is lifted at the top of the hoistway and fixed to replace the at least one main rope at a time while the tension of the existing main rope is invalidated. : 1 In the main rope replacement device of the 1-roping elevator, when raising and lowering the existing and the new main rope,
A rope hanger having one end screwed to the thimble rod and the other end attached to the winch; and a thimble rod for fixing the thimble rod to the floor of the machine room when removing the existing main rope and attaching the new main rope. Fixed employment, a main rope elevating guide body having a guide hole capable of vertically guiding along the existing and the new main rope, and a mounting body capable of attaching and detaching an elevating body for elevating the existing and new main rope, When the existing main rope is cut on the car, a main rope holding device to be attached below a cut portion of the main rope is provided.

[0011] Also, with this configuration, the winch for elevating and lowering the existing and new main ropes is interposed with a twist-back employment, and when raising and lowering the existing and new main ropes, the main rope lifting guide body is used. The main rope attached to the machine room with thimble rods at both ends is inserted into the insertion hole through which the rope can be inserted, and the main rope is lifted up and down while guiding it. The main rope does not swing and collide with the equipment in the hoistway.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a longitudinal sectional view of a hoistway for explaining an embodiment of a method for replacing a main rope of a 2: 1 roping elevator according to the present invention, and FIG. 2 is an attached state of a rope hanging device according to an embodiment of the present invention. FIG. 3 is a view showing an attached state of a thimble rod fixing member according to an embodiment of the present invention, FIG. 4 is a sectional view taken along line AA of FIG. 3, and FIG. It is a figure which shows the attachment state of the rope hung on the thimble rod of embodiment, FIG. 6 is a figure which shows the state which clamped the existing main rope with the main rope holding device of one Embodiment of this invention, FIG. FIG. 8 is an installation view of the main rope elevating guide body when the main rope according to the embodiment of the present invention is lowered, and FIG. FIG. 9 is a diagram showing attachment of the first and second thimble rods to the machine room floor. .

In the figure, a main rope 1 of a 2: 1 roping elevator is spring-mounted on a thimble rod mounting bracket 3A fixed to the floor of a machine room 3 by first and second thimble rods 2A, 2B connected to both ends. 4A and the car pulley 5A mounted on the car 5 via the spring seat 4B, the first thimble rod 2
A and a sheave 3B of a hoist (not shown) installed in the machine room 3
A counterweight pulley 6A wound around the main rope 1 between the main rope 1 and an upper part of the counterweight 6 is provided between the deflector wheel 3C of the hoist (not shown) and the second thimble rod 2B.
It is wound around. Here, as shown in FIG. 9, the terminal processing of the main rope 1 is such that the first and second thimble rods 2A, 2B are axially attached to a socket 1A in which the ends of the main rope 1 are stuffed with babbits or wedge action or the like. The first and second thimble rods 2A, 2B are supported and fixed to a thimble rod mounting bracket 3A of the machine room 3 by a nut 4C via a spring 4A and a spring seat 4B.

Next, a description will be given of the work of removing the main rope 1 in the work of replacing the main rope 1.

First, as a setup operation for removing the main rope 1 of the 2: 1 roping elevator, the main rope 1 is mounted on a receiving stand 7A having a predetermined height for supporting the counterweight 6 at the bottom of the hoistway 7 and a counterweight pulley 6A. A scaffold 7B having a predetermined height up to the position where the car is wound around is installed, and then the counterweight 6 is slowly lowered to support the counterweight 6 on the cradle 7a, and then the car stopped near the top floor FA. 5 is lifted from the top of the car by a chain block (not shown) to lift the main rope 1 for a predetermined length to invalidate the tension of the main rope 1, and further, the car 5 is moved to an intermediate beam (not shown) at the top of the hoistway 7 or a rail (not shown) for guiding the car 5. Hanging and fixing to enhance fall safety.
A winch 8 for raising and lowering the main rope 1 is movably installed in the machine room 3, and a rope hanger 9 detachably attached to the tip of a winch rope 8A is rotatable so that an upper part and a lower part which are divided into two parts can freely rotate. And a long nut 9B that is welded to the lower end of the twisting and rewinding 9A to screw the first and second thimble rods 2A and 2B. A drum 10 for winding the existing main rope 1 is installed on the lowermost floor FB.

Next, the operation of removing and winding the existing main rope 1 from the first and second thimble rods 2A and 2B will be described.

First, an operator climbs the scaffold 7B in a state where the tension of the main rope 1 is invalidated, and cuts one of the main ropes 1 at a position above the counterweight pulley 6A which is the first cutting point 1B, Next, the winch 8 is moved above the second thimble rod 2B, and as shown in FIG. 2, after the second thimble rod 2B is screwed to the long nut 9B of the rope hanging tool 9, the winch 8 is Upon activation, the winch rope 8A is wound up by a predetermined length of, for example, 20 cm to provide a gap between the thimble rod mounting bracket 3A and the spring seat 4B. Next, the thimble rod fixing member 11 is attached to this gap to hold the second thimble rod 2B and the main rope 1. Here, as shown in FIG. 3 and FIG. 4, the thimble rod fixing member 11 is a modified product of a giant vise, and includes a tip of a retractable bolt 11B provided at one end of a substantially U-shaped member 11A and a bolt 11B.
And the first and second thimble rods 2A and 2B
Is divided into two, and one of the nuts is
A nut 11C, which is divided into two parts, is welded to the tip of the U-shaped member 11A at a position opposed to the bolt 11B of the substantially U-shaped member 11A. The method of using the nut 11C is in the gap between the thimble rod mounting bracket 3A and the spring seat 4B. With the thimble rod fixing member 11 in place, the bolt 11B is tightened until the screw of the nut 11C divided into two engages with the screw of the thimble rod. After holding the second thimble rod 2B in this manner, the rope hanging tool 9 is removed from the second thimble rod 2B, the nut 4C is loosened, the spring 4A and the spring seat 4B are removed, and the second thimble rod 2B is moved to the second thimble rod 2B as shown in FIG. The rope hanger 9 is re-attached to the thimble rod 2B, the winch 8 is activated, and the rope hanger 9 moves the winch rope 8A and the main rope 1 at the first cutting point 1B from the second thimble rod 2B. It is lowered to the upper position and wound up on the drum 10 installed on the lowest floor FB. Here, in the case where the cut main rope 1 is twisted, the twist is returned by the rotation at the twist unwinding 9A portion of the rope hanging tool 9 attached to the end of the winch rope 8A, and the twist is returned, and the hoistway 7 descends. Sometimes does not hit the equipment.

Next, the winch 8 is activated, the winch rope 8A is wound up, and the worker uses the emergency opening (not shown) provided on the car ceiling from the car 5 to open the top of the car 5 using a pre-opened emergency exit. climb. Here, assuming that the distance H between the top of the hoistway 7 and the upper part of the car 5 is, for example, 3 m, the second cut 1C of the main rope 1 hanging from the deflector wheel 3C can be operated at the upper part of the car 5. The distance h1 from the top of the hoistway 7 is, for example, 2 m, and one end of the main rope 1 below the second cutting point 1C is connected to the winch rope 8A via the connecting member 8B or the both-can twist return device 8C. The attached main rope holding device 12 is attached. As shown in FIG. 6, the main rope holding device 12 includes two plates 12A sandwiching the main rope 1 and a plate 1A.
2 and a fixture 12C provided on each plate 12 and attached to the connector 8B. Next, after the winch 8 is wound up and the winch rope 8A and the main rope holding device 12 are stretched, the second cut 1B of the main rope 1 is cut, and the winch 8 is started to activate the winch rope 8A and the first cut point. 1
The main rope 1 from B to the second cutting point 1C is lowered and wound around the drum 10 installed on the lowest floor FB.

Next, after the winch rope 8A is rewound to the winch 8, the worker on the upper part of the car 5 moves to the sheave 3B.
The main rope 1 is cut at a third cutting point 1D in which the distance h2 of the main rope 1 from the top of the hoistway 7 between the car pulley 5A and the second cutting point 1B is the same distance as the second cutting point 1B. The main rope 1 between the cutting section 1C of the second section 2 and the third cutting section 1D is
After the long nut 9B of the rope hanging tool 9 is screwed to the first thimble rod 2A, the winch 8 is activated to move the winch rope 8A to a predetermined length, for example, 20 mm.
cm thimble rod mounting bracket 3A
The first thimble rod 2A and the main rope 1 at the third cutting point 1D are held by attaching the thimble rod fixing member 11 to a gap provided between the first thimble rod 2 and the first thimble rod 2B.
After removing the nut 4C, the spring 4A, and the spring seat 4B from A, the main rope 1 between the first thimble rod 2A and the third cutting point 1D is pulled up to the machine room 3 to remove the existing main rope 1. finish. Here, since the distance h1 and the distance h2 from the top of the hoistway 7 of the second cutting point 1C and the third cutting point 1D are substantially the same, cutting is performed at the first and second cutting points 1C and 1D. The left main rope 1 is left-right balanced and does not fall.

Next, the work of attaching the newly installed main rope 1a will be described.

First, as a setup operation, a drum (not shown) having a newly installed main rope 1a with a socket 1A mounted in advance at the end thereof is installed on the top floor FA, and the newly installed main rope 1a is installed.
Is lifted to the machine room 3 by the winch 8 and the winch rope 8A via the unillustrated doorway of the car 5 and the emergency rescue exit and the hoistway 7 not shown, and is wound around the sheave 3B and the deflector wheel 3C, It is once lowered to the upper part of car 7 of car 7.

Next, the worker at the upper part of the car 5
As shown in (2), an uncut main rope 1b and a new main rope 1a that are suspended from the deflector wheel 3C and are not yet cut are attached to the main rope lifting guide body 13. Here, the main rope elevating guide body 13 shown in FIG. 7 is a plate body 13A, 13B that can be divided into two.
Of the deflector wheel 3C and the counterweight pulley 6
A plurality of insertion holes 13Ca, 13Cb, 13Cc, each of which can be inserted into the main rope 1 laid between A, a fixing bracket 13D for fixing the end of the newly installed main rope 1a and the winch rope 8A provided in the plate 13A. And a joint 13E for joining the plates 13A and 13B, respectively. In addition, when attaching the existing main rope 1b and the new main rope 1a to the main rope elevating guide body 13, the existing main rope 1b is inserted into the insertion holes 13Ca and 13Cb, respectively, and the socket 1A of the new main rope 1a is connected to both sides. Fixing bracket 1 via can twist back tool 8C
Connect to 3D. Since the newly installed main rope 1a attached to the main rope elevating guide body 13 falls under its own weight, the operator slowly descends to the counterweight pulley 6A while holding down the newly installed main rope 1a in the machine room 3. Here, the newly-installed main rope 1a descends while untwisting with the double-can twist return device 8C, and the insertion hole 13C of the main rope elevating guide body 13 is inserted.
a, 13Cb, while descending while being guided by the existing main rope 1b, the equipment on the hoistway 7 is not damaged by collision.

Next, the worker of the scaffold 7B receives the newly installed main rope 1
a from the main rope elevating guide body 13 and the counterweight pulley 6
A around the socket A and the second thimble rod 2 around the socket 1A.
After attaching B, as shown in FIG. 8, the existing main rope 1b is inserted through the insertion holes 13Ca, 13Cb of the main rope lifting guide body 13, and the winch rope 8A lowered from the machine room 3 is inserted into the insertion hole 13Cc. After the insertion, the winch rope 8A is fixed to the fixing bracket 13D, and the winch rope 8A is fixed.
The second thimble rod 2B is screwed to the long nut 9B of the rope hanging tool 9 attached to the tip of A. Next, the operator of the machine room 3 activates the winch 8 to activate the newly installed main rope 1a.
Is raised to the machine room 3, the thimble rod fixed employment 11 is attached to the second thimble rod 2B to hold the newly installed main rope 1a, and the second thimble rod 2B is removed from the rope hanging tool 9. The spring 4A, the spring seat 4B, and the nut 4C are mounted on the second thimble rod 2B, and the thimble rod fixing member 11 is removed.

The worker at the upper part of the car 5 winds the newly installed main rope 1a wound around the deflecting wheel 3C and the sheave 3B of the machine room 3 around the car pulley 5A, and The first thimble rod 2A is attached to the socket 1A previously attached to the end of the main rope 1a, and the machine room 3
The first thimble rod 2A is screwed to the long nut 9B of the rope hanging tool 9 attached to the tip of the winch rope 8A that has been lowered. Hereinafter, the operation of attaching the first thimble rod 2A to the thimble rod attachment bracket 3A is the same as the operation of attaching the second thimble rod 2B described above, and a description thereof will be omitted.

Further, the replacement work of the other main ropes 1 is the same as the above-described work, and the description is omitted.

As described above, when the main rope 1 is moved up and down to replace the main rope 1, the main rope elevating guide body 13 and the untwist 9 are used.
By using the rope suspending tool 9 having the A and the double-cance twisting and returning tool 8C, the movement of the main rope 1 at the time of ascent and descent is restricted, and damage to the hoistway equipment due to the collision of the main rope 1 can be prevented. Also,
By going up and down while returning the twist that had occurred on the main rope 1,
Since the tension of the plurality of main ropes 1 is also substantially uniform, the operation of adjusting the tension of the main ropes 1 after replacement can be performed easily and in a short time.

[0028]

According to the present invention, the existing main rope is a first cut portion at the upper portion of the counterweight pulley, and the upper part of the existing main rope between the car pulley and the hoist pulley is gripped by the main rope holding device. The second cutting position, the existing main rope hanging from the first thimble rod to the pulley on the car is cut at a third cutting position substantially at the same position as the second cutting position, and is cut from the first cutting position at the third cutting position. In each case, the existing main ropes are collected, that is, the parts from the first cutting point to the second thimble rod are suspended and collected by a winch, and the parts from the first cutting point to the second cutting point are suspended and collected by a winch. After the second cutting section to the third cutting section and the first thimble rod to the third cutting section are lifted into the machine room and collected, the new main rope is arranged while being guided by a main rope other than the main rope. After the second thimble rod is attached, And to attach the machine room floor portion Bururoddo. In this way, the existing main rope is cut at three places, so the transportation after the recovery of the main rope can be performed manually.
Special equipment for carrying heavy objects is not required.

Also, with this configuration, the winch for elevating and lowering the existing and new main ropes is provided with a twist-back employment, and when raising and lowering the existing and new main ropes, the main rope lifting guide body is used. The main rope attached to the machine room with thimble rods at both ends is inserted into the insertion hole through which the rope can be inserted, and the main rope is lifted up and down while guiding it. The main rope does not swing and collide with the equipment in the hoistway.

[Brief description of the drawings]

FIG. 1 is a vertical sectional view of a hoistway for explaining an embodiment of a method for exchanging main ropes of a 2: 1 roping elevator according to the present invention.

FIG. 2 is a view showing a mounted state of the rope hanging device of one embodiment of the present invention.

FIG. 3 is a view showing an attached state of a fixed thimble rod according to an embodiment of the present invention.

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a diagram showing a state in which a rope hanger is attached to the thimble rod according to the embodiment of the present invention.

FIG. 6 is a diagram illustrating a state where an existing main rope is gripped by the main rope holding device according to the embodiment of the present invention.

FIG. 7 is a mounting view of the main rope elevating guide body when the main rope according to the embodiment of the present invention is lowered.

FIG. 8 is a view showing how a main rope elevating guide is attached when the main rope according to the embodiment of the present invention is raised.

FIG. 9 is a diagram showing attachment of first and second thimble rods to a machine room floor.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main rope 1B 1st cutting place 1C 2nd cutting place 1D 3rd cutting place 2A 1st thimble rod 2B 2nd thimble rod 8 Winch 8A Winch rope 9 Rope hanging tool 9A Twist return employment 9B Long nut 11 Fixed thimble rod 12 Main rope holding device 13 Main rope elevating guide

Claims (5)

[Claims] 1. A first thimble rod and a second thimble rod connected to both ends of a main rope are installed on a floor of a machine room via springs, and droop from the first sibble rod and a pulley of a hoist. The main rope thus obtained is wound around a car pulley provided above the car, and the main rope suspended from the hoisting machine pulley and the second thimble rod is wound around a counterweight pulley provided above the counterweight. 2: 1
A method of exchanging main ropes of a roping elevator, wherein the counterweight is supported at the bottom of the hoistway, and the car is hung up at the top of the hoistway and fixed to nullify the tension of the existing main ropes, In the main rope exchanging method for a 2: 1 roping elevator in which a plurality of main ropes are exchanged at least one by one, the tension of the existing main rope is invalidated while the car is stopped near a top floor, and Existing main rope 1
Cutting the book at a first cutting point above the counterweight pulley,
The top of the second thimble rod is screwed to a rope suspending device attached to a winch, and the existing main rope from the first cut portion to the second thimble rod is suspended by the winch and collected. After the existing main rope between the counterweight pulley and the hoist pulley is gripped by the main rope holding device in the vicinity of the hoist pulley, the general main rope is pulled at a second cut point above the gripped portion. Cutting, attaching the rope hanging tool to the main rope holding device, suspending and recovering the existing main rope from the first cutting point to the second cutting point with the winch, and recovering the main rope from the first thimble rod. The existing main rope hanging down to the car pulley is cut at a third cutting point substantially at the same position as the second cutting point of the existing main rope, and the existing main rope from the second cutting point to the third cutting point and the second main cutting line are cut. 1
After the existing main rope from the thimble rod to the third cutting point is lifted into the machine room and collected, the new main rope is then moved from the top floor to the car through a rescue exit provided on the car ceiling. After wrapping around the upper pulley and pulling up to the machine room, attaching a rope socket to one end of the new main rope,
Wrap the hoisting machine pulley, lower it to the hoistway while guiding it with a main rope other than the applicable main rope, wind it around the counterweight pulley, attach the second thimble rod to the rope socket, and attach it to the winch The second thimble rod is screwed to the rope hanging tool, and the second thimble rod is lifted up in the machine room, and the second thimble rod is installed on the machine room floor. A method of exchanging main ropes of a 2: 1 roping elevator, wherein a rope socket and the first thimble rod are attached, and then the first thimble rod is lifted up in the machine room and installed on the floor of the machine room. 2. A first thimble rod and a second thimble rod connected to both ends of a main rope are installed on a floor of a machine room via springs, and are connected to the first thimble rod and a pulley of a hoist. The suspended main rope is wound around a car pulley provided at an upper part of a car, and the hoist pulley and the second
The main rope hung from the thimble rod is wound around a counterweight pulley provided above the counterweight.
(1) A main rope exchanging device for a roping elevator, wherein the counterweight is supported at the bottom of the hoistway, and the car is hung up at the top of the hoistway and then fixed to invalidate the tension of the existing main rope. In a main rope exchanging device for a 2: 1 roping elevator for exchanging at least one main rope at a time, when raising and lowering the existing and the new main ropes, one end is screwed to a thimble rod and the other end is a winch. A rope hanger to be mounted on the floor, a thimble rod fixing member for fixing the thimble rod to the floor of the machine room when removing the existing main rope and attaching the new main rope, and the existing and the new main rope. A main hole elevating guide body having a guide hole capable of guiding up and down along a main body, and an attaching / detaching body on which an elevating body for elevating and lowering an existing and a new main rope is mounted; When cutting on your of 2, characterized in that a main rope holding device for mounting below the cut portion of the main ropes: 1 main rope replacement device roping elevator. 3. The 2: 1 rope according to claim 2, wherein the rope hanger is detachably attached to a rope end of the winch, and has a twist-back member that allows vertical rotation. Main rope replacement device for roping elevators. 4. The thimble rod fixing member according to claim 2, wherein the nut fixed to the two divided thimble rods is welded to the fixed portion and the movable portion facing each other, respectively. Main rope changer for 2: 1 roping elevator. 5. The at least one elevating body of the main rope elevating guide body is attached to at least one insertion hole through which a main rope can be inserted, and at the end of an existing or newly installed main rope through the twist-back union. 3. The main rope exchanging device for a 2: 1 roping elevator according to claim 2, further comprising a fixture.