JP7761010B2 - Elevator main rope replacement aid and main rope replacement method using the main rope replacement aid - Google Patents

Description

This disclosure relates to an elevator main rope replacement aid and a main rope replacement method using the replacement aid.

Patent Document 1 discloses technology related to a main rope tangle prevention device used when replacing an elevator's main rope. The main rope tangle prevention device in this technology is slidably attached to the base of one of the protruding pieces of the guide rail. The main rope tangle prevention device also includes a rope guide for securing the main rope. This configuration is said to allow the main rope to descend straight within the hoistway.

Japanese Patent Application Publication No. 9-100078

The main rope entanglement prevention device described in Patent Document 1 is attached to the base of one of the protruding pieces of the guide rail. Therefore, this main rope entanglement prevention device has the problem that it can only be attached to guide rails that have a step formed between the base and tip of the protruding piece.

This disclosure has been made to solve the problems described above, and aims to provide technology for a versatile, easy-to-use main rope replacement aid that can be attached to a wide variety of guide rails during elevator main rope replacement work.

The elevator main rope replacement aid disclosed herein is a main rope replacement aid for replacing the main rope that suspends the car and counterweight in a 1:1 roping system within the elevator shaft, and comprises a rod-shaped first member that extends in a direction spanning a pair of guide rails for guiding the counterweight, a pair of second members that extend from both ends of the first member along the extension direction of the pair of guide rails, guide rollers that are provided on both ends of each of the pair of second members and roll along the guide rails, and a main rope clamping portion that is fixed to the first member and clamps the end of the main rope while allowing movement in the rotational direction.

The elevator main rope replacement method disclosed herein is a method that uses a main rope replacement aid to replace the main rope that suspends the car and counterweight in a 1:1 roping system within the elevator hoistway. The main rope replacement aid comprises a rod-shaped first member that extends in a direction spanning a pair of guide rails for guiding the counterweight, a pair of second members that extend from both ends of the first member along the extension direction of the pair of guide rails, and guide rollers that are provided on both ends of each of the pair of second members and roll along the guide rails. and a main rope clamping part fixed to the first member that clamps the end of the main rope while allowing movement in the rotational direction. The main rope replacement method includes a first step of fixing the counterweight in a specified position and removing the existing main rope from the counterweight, a second step of installing the main rope replacement aid between a pair of guide rails, a third step of clamping the end of the main rope in the main rope clamping part, a fourth step of lowering the main rope replacement aid to the specified position, and a fifth step of removing the end of the main rope from the main rope clamping part and connecting it to the counterweight.

The elevator main rope replacement aid disclosed herein is installed by bridging it between a pair of guide rails, so there are no restrictions on the shape of the guide rails it can be installed on. This allows it to be installed on a wide variety of guide rails, making it possible to provide technology for a highly versatile and easy-to-use main rope replacement aid.

1 is a diagram showing an example of an elevator to which the main rope replacement aid of the embodiment is applied. FIG. 10 is a diagram showing a comparative example of elevator main rope replacement work. FIG. 10 is a diagram showing a comparative example of elevator main rope replacement work. FIG. 10 is a diagram showing a comparative example of elevator main rope replacement work. FIG. 10 is a diagram showing an example of crossing of the main ropes. 10A and 10B are diagrams for explaining the configuration of a main rope replacement aid according to an embodiment. 7 is a view of the main rope replacement aid shown in FIG. 6 as viewed from direction A. FIG. 1 is an enlarged view of the periphery of the main rope clamping portion of the main rope replacement aid. FIG. FIG. 9 is a view of the main rope clamping portion as viewed from direction B of FIG. FIG. 10 is an enlarged schematic diagram of the structure in an area C surrounded by a dashed line in FIG. 9 . 11 is a schematic diagram of the switching mechanism of FIG. 10 as viewed from the direction D in the drawing. FIG. 10 is a diagram showing the state of the switching mechanism before the main rope is attached. FIG. 10 is a diagram showing the state of the switching mechanism when the main rope is attached. FIG. 10 is a diagram showing the state of the switching mechanism after the main rope is attached. FIG. 10 is a diagram showing the locked state of the switching mechanism after the main rope is attached. FIG. 10 is a diagram showing the unlocked state of the switching mechanism after the main rope is attached.

The following describes the embodiments with reference to the drawings. Note that common elements in each drawing are designated by the same reference numerals, and redundant explanations will be omitted.

Embodiment
1. Configuration of an Elevator According to the Present Embodiment Figure 1 is a diagram showing an example of an elevator to which a main rope replacement aid according to the present embodiment is applied. The elevator includes a car 1 and a counterweight 2. The car 1 has a plurality of panel members connected to one another to form an interior space. The car 1 moves up and down in a hoistway 3. The counterweight 2 moves up and down on the rear side of the car 1 in the hoistway 3. The car 1 and the counterweight 2 are suspended in the hoistway 3 by a plurality of main ropes 4. A 1:1 roping system is used as the roping system for suspending the car 1 and the counterweight 2.

The main rope 4 is wound around the drive sheave 6 of the hoist 5. The hoist 5 is controlled by a control device (not shown). When the drive sheave 6 rotates, the main rope 4 moves in a direction corresponding to the direction in which the drive sheave 6 rotates. The car 1 rises or falls depending on the direction in which the main rope 4 moves. The control device stops the car 1 according to the position of the hall 10. A hall door device 12 is provided at the hall 10 on each floor.

The movement of the car 1 is guided by a pair of guide rails 9. The pair of guide rails 9 are arranged from the pit 3a of the hoistway 3 to the top of the hoistway 3. The pit 3a is a space formed in the hoistway 3 below the landing 10 on the lowest floor. The car 1 is arranged between the pair of guide rails 9.

The counterweight 2 moves in the direction opposite to the direction in which the car 1 moves in the hoistway 3 behind the car 1. The movement of the counterweight 2 is guided by a pair of guide rails 14. The guide rails 14 are installed in a straight line in the vertical direction. The guide rails 14 are arranged from the pit 3a of the hoistway 3 to the top of the hoistway 3. The counterweight 2 is arranged between the pair of guide rails 14.

The guide rail 14 comprises, for example, a flange portion and a guide portion. A bracket (not shown) for securing the guide rail 14 to a fixed body of the elevator shaft 3 is fixed to the flange portion. The guide portion protrudes from the flange portion toward the counterweight 2. The guide portions of the pair of guide rails 14 face each other with a fixed gap between them.

2. Comparative Example of Main Rope Replacement Work First, a comparative example of elevator main rope replacement work will be described. Figures 2, 3, and 4 are diagrams showing a comparative example of elevator main rope replacement work. Note that Figures 2 to 4 only show the configuration related to the main rope replacement work. In Figures 2 to 4, the same reference numerals are used for the configurations common to the elevator in Figure 1, and the description will be omitted.

In the elevator shown in this diagram, the car 1 and counterweight 2 are connected by multiple main ropes 4. First, the car 1 is fixed at the top floor landing 10. Meanwhile, the counterweight 2 is placed on a beam 16 at a specified position in the pit 3a at the bottom of the hoistway 3. Next, as shown in Figure 3, the existing main rope 4 to be replaced is removed and pulled up into the machine room 8. Then, a new main rope 4 is lowered, first on the car 1 side and then on the counterweight 2 side.

Because the new main rope 4 is wound in a coil before installation, it may still have a tendency to curl. In this case, as shown in Figure 4, there is a possibility that the new main rope 4 may cross the existing main rope 4 when it is lowered. Figure 5 is a diagram showing an example of main rope crossing. Figure 5 shows an example in which one of the three main ropes 4 crosses another main rope 4. When a main rope 4 crosses an existing main rope 4 in this way, there is a risk of problems such as damage to the main rope itself and damage to equipment installed in the hoistway 3 due to contact with the rope.

3. Configuration of the Main Rope Replacement Aid of the Present Embodiment The main rope replacement aid of the present embodiment is a device that assists in the work of lowering the main rope 4 during replacement work so that it does not get tangled with the existing main rope. Figure 6 is a diagram for explaining the configuration of the main rope replacement aid of the present embodiment. The main rope replacement aid 20 is characterized by comprising a rod-shaped expandable pipe 22 as a first member, a pair of roller holding plates 24 as a pair of second members, a plurality of guide rollers 26, a main rope clamping portion 28, and a lifting line 30.

The telescopic pipe 22 is configured to extend in a direction spanning a pair of guide rails 14 for guiding the counterweight 2. A pair of roller holding plates 24 are configured to extend from both ends of the telescopic pipe 22 in the extension direction of the pair of guide rails 14. Guide rollers 26 are provided at both ends of each of the pair of roller holding plates 24 and are configured to roll along the guide rails 14. The main rope clamping portion 28 is fixed to the telescopic pipe 22 and is configured to be able to clamp the end of the main rope 4 while allowing movement in the rotational direction. The lifting line 30 is a wire member with one end connected to the main rope clamping portion 28. These components of the main rope replacement aid 20 are explained in detail below.

3-1. Telescopic pipe 22
FIG. 7 is a view of the main rope replacement aid shown in FIG. 6 as viewed from direction A. The telescopic pipe 22 includes a first pipe 221, a second pipe 222, and a fixing mechanism 223. One end of the first pipe 221 is fixed to one of the pair of roller holding plates 24. One end of the second pipe 222 is fixed to the other of the pair of roller holding plates 24. The other end of the second pipe 222 is slidably inserted into the other end of the first pipe 221. The fixing mechanism 223 fixes the relative position of the second pipe 222 with respect to the first pipe 221. The fixing mechanism 223 may employ a structure in which, for example, a threaded portion is provided in the through-hole of the second pipe 222, a bolt is inserted into the threaded portion, and the tip of the bolt is pressed against the first pipe 221 to fix the second pipe 222. With this configuration, the telescopic pipe 22 can be configured to be telescopic to any length. For the purpose of reducing weight, an aluminum alloy or the like can be used for the telescopic pipe 22.

The telescopic pipe 22 may have a relief structure that bends it away from the existing main rope 4 so that it does not interfere with the existing main rope 4 when the guide roller 26 rolls along the pair of guide rails 14. In elevators using the 1:1 roping system, the existing main rope 4a is suspended between the guide portions 141 of the pair of guide rails 14. For this reason, if the telescopic pipe 22 is configured as a straight pipe, there is a risk that it will interfere with the existing main rope 4a.

In this embodiment, the first pipe 221 and the second pipe 222 are provided with curved sections 224 and 225, respectively. The curved sections 224 and 225 are curved at least in a direction away from the existing main ropes 4a. This configuration of the telescopic pipe 22 prevents the existing main ropes 4a from interfering with the telescopic pipe 22 in a 1:1 roping elevator.

3-2. Roller holding plate 24
Each of the pair of roller holding plates 24 has a leaf spring structure that urges the guide rollers 26 toward the corresponding guide rails 14. Typically, the pair of roller holding plates 24 has a shape that is curved in an arch shape from both ends of the telescopic pipe 22 toward each of the pair of guide rails 14. Note that the roller holding plates 24 can be made of an aluminum alloy or the like for the purpose of reducing weight.

Note that the shorter the overall length of the roller holding plate 24 in the extension direction of the guide rail, the greater the possibility that the main rope replacement aid will tilt and the guide roller 26 will come off. Therefore, it is desirable that the roller holding plate 24 have a total length sufficient to allow the main rope replacement aid to be lowered stably.

3-3. Guide roller 26
The guide rollers 26 are rollers that face, for example, the guide portions 141 of the guide rail 14 from three directions. With this structure, the guide rollers 26 can be prevented from coming off the guide rail 14.

3-4. Main rope clamping portion 28
3-4-1. Basic configuration of the main rope clamping portion 28 Figure 8 is an enlarged view of the periphery of the main rope clamping portion of the main rope replacement aid. Figure 9 is a view of the main rope clamping portion as seen from direction B in Figure 8. Note that Figure 9 shows a partial perspective view of the interior of the main rope clamping portion.

The main rope clamping unit 28 is composed of a first clamping piece 42, a second clamping piece 44, a support shaft 46, and a switching mechanism 40. The first clamping piece 42 includes a first clamping surface 42a having a first clamping surface along the outer peripheral surface of the main rope 4, a protrusion 42b, and a rope guide 42c. The second clamping piece 44 includes a second clamping surface 44a having a second clamping surface along the outer peripheral surface of the main rope 4, a fixing portion 44b, and a rope guide 44c. The fixing portion 44b of the second clamping piece 44 is a portion for fixing the second clamping piece 44 to the main rope clamping unit 28. The first clamping piece 42 is rotatably connected to the second clamping piece 44 via the support shaft 46 so that the first clamping surface 42a faces the second clamping surface 44a.

The first clamping surface portion 42a and the second clamping surface portion 44a are surfaces for clamping the tip of the main rope 4 connected to the rope shackle 4b. Felt members 48 are attached to the first clamping surface portion 42a and the second clamping surface portion 44a to prevent slipping and scratches.

The protrusion 42b of the first clamping piece 42 functions as a trigger for activating the switching mechanism 40. The rope guides 42c, 44c of the first clamping piece 42 and the second clamping piece 44 extend divergently from the tip ends of the first clamping surface 42a and the second clamping surface 44a. When the main rope 4 is pressed by the rope guides 42c, 44c toward the first clamping surface and the second clamping surface, the first clamping piece 42 is guided away from the second clamping piece 44. The first clamping piece 42 and the second clamping piece 44 are configured to clamp the main rope 4 with enough force to allow rotational movement. This configuration prevents twisting of the main rope 4 when it is lowered.

The switching mechanism 40 prevents the first clamping piece 42 and the second clamping piece 44 from opening while clamping the main rope 4. Figure 10 is an enlarged schematic diagram of the structure within area C surrounded by the dashed line in Figure 9. Figure 11 is a schematic diagram of the switching mechanism in Figure 10 viewed from direction D in the figure. The switching mechanism 40 is composed of an unlocking lever 52, an arm portion 54, a first spring portion 56, a locking portion 58, a folding piece portion 60, and an operating piece portion 62. Each of these components is installed in the main rope clamping portion 28 in an operable state.

The unlocking lever 52 is an operating member that is operated by an operator to release the main rope 4 from the locked state by the switching mechanism 40. The operating section of the unlocking lever 52 that is operated by the operator is exposed to the outside. When the operating section of the unlocking lever 52 is operated, a force is applied to the force point 54a of the arm portion 54.

A locking portion 58 is linked to the application point 54b of the arm portion 54. The locking portion 58 is biased by the first spring portion 56 in a direction that causes it to protrude outward from the hole 44d in the fixed portion 44b. When the lock release lever 52 is operated and a force is applied to the application point 54a of the arm portion 54, the relative position of the locking portion 58 moves from a first state in which the locking portion 58 protrudes outward from the hole 44d in the fixed portion 44b to a second state in which the locking portion 58 is housed within the hole 44d.

The inclined piece 60 includes a fixed piece 60a fixed to the fixed part 44b and a inclined piece 60b linked to the tip of the fixed piece 60a. The inclined piece 60b is biased to a position that is in a straight line with the inverted direction of the fixed piece 60a. However, the inclined piece 60b is configured so that it can be inclined in either direction a or b in the figure.

The actuating piece 62 includes a base 62a and a protrusion 62b. The base 62a is biased by the second spring 64 in a direction toward the tiltable piece 60 (direction c in the figure). The protrusion 62b is configured so that when the first clamping piece 42 rotates around the support shaft 46, the protrusion 42b comes into contact with the base 62, causing the actuating piece 62 to move in a direction away from the tiltable piece 60 (direction d in the figure).

3-4-2. Locking Operation of the Main Rope Holding Portion 28 Next, the locking operation of the main rope holding portion 28 will be described.
12 is a diagram showing the state of the switching mechanism before the main rope 4 is attached. As shown in this figure, before the main rope 4 is attached, the operating piece 62 is positioned on the side of the tiltable piece 60, and the locking portion 58 is housed in the hole 44d, resulting in a second state. In the second state, the tiltable piece 60b of the tiltable piece 60 can be tilted in the direction b in the figure. Therefore, the second state of the switching mechanism 40 can be said to be an allowable state in which the first clamping surface 42a is allowed to separate from the second clamping surface 44a.

Figure 13 shows the state of the switching mechanism when the main rope is attached. When the main rope 4 is pressed against the first clamping surface 42a and the second clamping surface 44a in the state shown in Figure 12, the gap between the rope guides 42c, 44c widens. As a result, the protrusion 42b of the first clamping piece 42 moves in direction d in Figure 13 while tilting the folding piece 60b of the folding piece 60. At this time, the protrusion 42b moves the operating piece 62 in direction d in Figure 13. As a result, the switching mechanism 40 enters the first state in which the locking portion 58 protrudes outward from the hole 44d of the fixing portion 44b.

Figure 14 shows the state of the switching mechanism after the main rope is attached. When the main rope 4 enters between the first clamping surface 42a and the second clamping surface 44a, the gap between the rope guides 42c, 44c narrows. As a result, the protrusion 42b of the first clamping piece 42 moves in the direction c in Figure 14 while tilting the tiltable piece 60b of the tiltable piece 60. At this time, the operating piece 62 is held in a position where it contacts the protruding locking portion 58. Once the protrusion 42b has passed, the tiltable piece 60b of the tiltable piece 60 is again held in an inverted position.

Figure 15 shows the locked state of the switching mechanism after the main rope is attached. In the locked state shown in Figure 5, the folding piece 60b of the folding piece portion 60 is restricted from falling toward the locking portion 58. As a result, the protrusion 42b cannot move toward the operating piece portion 62 by folding the folding piece 60b, thereby preventing the gap between the rope guide portions 42c and 44c from widening. In other words, the first state of the switching mechanism 40 can be considered a restricted state in which the separation of the first clamping surface portion 42a from the second clamping surface portion 44a is restricted.

Figure 16 shows the unlocked state of the switching mechanism after the main rope has been attached. To unlock the switching mechanism 40, the unlock lever 52 shown in Figure 9 is operated, and a force is applied to the force point 54a of the arm portion 54 in Figure 16. This moves the relative position of the locking portion 58 from a first state in which the locking portion 58 protrudes outward from the hole 44d of the fixed portion 44b to a second state in which the locking portion 58 is retracted within the hole 44d. As a result, the operating piece 62 moves in the direction c in the figure due to the biasing force of the second spring portion 64, restricting the locking portion 58 from protruding from the hole 44d. This allows the protrusion 42b of the first clamping piece 42 to move in the direction c in the figure, thereby widening the gap between the first clamping surface 42a and the second clamping surface 44a again.

3-5. Lifting line 30
The lifting line 30 is a lifting wire member used by an operator to lift the main rope replacement aid 20 that has been lowered in the hoistway 3 to the machine room 8. The lifting line 30 may be made of, for example, a metal wire or the like having a tensile strength sufficient to lift the weight of the main rope replacement aid 20. There is no limit to the number of lifting lines 30.

4. Main rope replacement method using the main rope replacement aid 20 of this embodiment will now be described. The work of removing the main rope to be replaced is the same as the main rope replacement method of the comparative example described above.

Once the main rope to be replaced has been removed, the next step is to install a new main rope. First, the new main rope 4 is lowered next to the car 1, and the end of the main rope is secured to the car 1.

Next, the main feature of the main rope replacement work in this embodiment is the work of lowering a new main rope to the side of the counterweight 2. This work is performed by a worker from the machine room 8. First, the main rope replacement aid 20 is attached to the pair of guide rails 14. Specifically, the length of the telescopic pipe 22 is adjusted so that the left and right guide rollers 26 contact each of the pair of guide rails 14. At this time, it is desirable to adjust the roller holding plate 24 so that it is slightly bent to the extent that pressure is applied to the guide rollers 26. As a result, even if there is an error in the width dimension between the pair of guide rails 14, the error can be absorbed by the bending of the roller holding plate 24.

Next, the tip of the main rope 4 is fixed to the main rope clamping portion 28. At this time, since the first clamping piece 42 and the second clamping piece 44 are equipped with rope guide portions 42c, 44c, the main rope can be guided between the first clamping surface portion 42a and the second clamping surface portion 44a simply by pressing the main rope into the gap between the rope guide portions 42c, 44c. In addition, felt members 48 are attached to the first clamping surface portion 42a and the second clamping surface portion 44a, preventing damage to the main rope 4.

Next, the worker gradually lowers the main rope 4 from the machine room 8. As a result, the main rope replacement aid 20 gradually descends downward along the guide rail 14. During this process, the main rope clamping portion 28 clamps the main rope 4 so that it can rotate freely, preventing twisting of the main rope 4. In addition, because the telescopic pipe 22 is equipped with curved portions 224, 225, it is possible to prevent the existing main rope from interfering with the main rope replacement aid 20 during the work of lowering the main rope 4.

Once the main rope replacement aid 20 has been lowered to the counterweight 2, the worker operates the lock release lever 52 to unlock the switching mechanism 40 and remove the tip of the main rope 4 from the main rope clamping portion 28. The removed tip of the main rope 4 is then connected to the counterweight 2.

A worker in the machine room 8 holds one end of the lifting line 30. After the main rope has been removed, the main rope replacement aid 20 is lifted up to the machine room 8 using the lifting line 30. By repeating this series of operations, multiple main ropes 4 are replaced in sequence.

The main rope replacement method using the main rope replacement aid described above allows the width of the main rope replacement aid 20 to be adjusted to match the width dimensions of the guide rail, making it possible to attach it to a wide variety of guide rails. This makes it possible to provide a highly versatile and easy-to-use main rope replacement aid 20 and a main rope replacement method using it.

5. Modifications The main rope replacement aid 20 according to this embodiment may be modified as follows.

The main rope replacement aid 20 may be equipped with multiple main rope clamping units 28. This makes it possible to lower multiple main ropes at once.

There are no limitations on the configuration of the main rope clamping portion 28, as long as it can clamp the tip of the main rope 4.

5. Others Although the preferred embodiments have been described in detail above, the present disclosure is not limited to the above-described embodiments, and various modifications and substitutions can be made to the above-described embodiments without departing from the scope of the claims.

The various aspects of this disclosure are summarized below as appendices.

(Appendix 1)
A main rope replacement aid for replacing a main rope that suspends a car and a counterweight in a 1:1 roping system in an elevator hoistway,
a rod-shaped first member extending in a direction spanning a pair of guide rails for guiding the counterweight;
a pair of second members extending from both ends of the first member along the extending direction of the pair of guide rails;
guide rollers provided at both ends of each of the pair of second members and rolling along the guide rail;
a main rope clamping portion fixed to the first member and clamping the end portion of the main rope while allowing movement in a rotational direction;
An elevator main rope replacement aid equipped with:
(Appendix 2)
The first member is
a first pipe having one end fixed to one of the pair of second members;
a second pipe having one end fixed to the other of the pair of second members and the other end slidably inserted into the other end of the first pipe;
a fixing mechanism that fixes a relative position of the second pipe with respect to the first pipe;
2. The elevator main rope replacement aid according to claim 1, comprising:
(Appendix 3)
The elevator main rope replacement aid described in Appendix 1 or Appendix 2, wherein each of the pair of second members has a leaf spring structure that urges the guide roller in the direction of the corresponding pair of guide rails.
(Appendix 4)
The elevator main rope replacement aid described in Appendix 1 or Appendix 2, wherein the first member has a curved portion bent in a direction away from the existing main rope so as not to interfere with the existing main rope when the guide roller is rolled along the pair of guide rails.
(Appendix 5)
An elevator main rope replacement aid as described in any one of appendices 1 to 4, comprising a lifting line member having one end fixed to the main rope replacement aid.
(Appendix 6)
The main rope clamping portion is
a first clamping piece portion having a first clamping surface;
a second clamping piece portion having a second clamping surface, the second clamping surface being opposed to the first clamping surface, and the first clamping piece portion being rotatably connected to the second clamping piece portion via a support shaft;
a switching mechanism that can switch between an allowable state that allows the first clamping surface to separate from the second clamping surface and a restricting state that restricts the separation;
6. The elevator main rope replacement aid according to any one of claims 1 to 5, comprising:
(Appendix 7)
The elevator main rope replacement aid described in Appendix 6 further includes a guide portion provided at the tip end of the first clamping piece and the second clamping piece, which guides the first clamping surface in a direction away from the second clamping surface when the main rope is pressed from the tip end toward the first clamping surface and the second clamping surface.
(Appendix 8)
A main rope replacement method using a main rope replacement auxiliary tool for replacing a main rope that suspends a car and a counterweight in a 1:1 roping system in an elevator hoistway, comprising:
The main rope replacement aid is
a rod-shaped first member extending in a direction spanning a pair of guide rails for guiding the counterweight;
a pair of second members extending from both ends of the first member along the extending direction of the pair of guide rails;
guide rollers provided at both ends of each of the pair of second members and rolling along the guide rail;
A main rope clamping portion is fixed to the first member and clamps the end of the main rope while allowing movement in a rotational direction,
The main rope replacement method includes:
a first step of fixing the counterweight in place and removing the existing main rope from the counterweight;
a second step of installing the main rope replacement aid between the pair of guide rails;
a third step of clamping an end of the main rope in the main rope clamping portion;
A fourth step of lowering the main rope replacement aid to the specified position;
a fifth step of removing the end of the main rope from the main rope clamping portion and connecting it to the counterweight;
A main rope replacement method comprising:
(Appendix 9)
The first member is
a first pipe having one end fixed to one of the pair of second members;
a second pipe having one end fixed to the other of the pair of second members and the other end slidably inserted into the other end of the first pipe;
a fixing mechanism that fixes the relative position of the second pipe with respect to the first pipe,
The second step comprises:
adjusting a relative position of the second pipe with respect to the first pipe so that the guide rollers contact each of the pair of guide rails, and fixing the second pipe with the fixing mechanism.
(Appendix 10)
The main rope replacement aid is
Further provided is a lifting line member having one end fixed to the main rope replacement aid,
The main rope replacement method includes:
The main rope replacement method according to claim 8 or 9, further comprising, after the fifth step, a step of pulling up the main rope replacement aid upward by the pulling-up line member.

DESCRIPTION OF SYMBOLS 3 Hoistway, 3a Pit, 4 Main rope, 4a Main rope, 4b Rope shackle, 5 Hoisting machine, 6 Driving sheave, 8 Machine room, 9 Guide rail, 10 Landing, 12 Landing door device, 14 Guide rail, 16 Square beam, 20 Main rope replacement aid, 22 Expansion pipe, 24 Roller holding plate, 26 Guide roller, 28 Main rope clamping portion, 30 Lifting line, 40 Switching mechanism, 42 First clamping piece portion, 42a First clamping surface portion, 42b Projection portion, 42c, 44c Rope guide portion, 44 Second clamping piece portion, 44a Second clamping surface portion, 44b Fixing portion, 44d Hole portion, 46 Support shaft, 48 Felt member, 52 Unlock lever, 54: Arm portion, 54a: Force point, 54b: Action point, 56: First spring portion, 58: Lock portion, 60: Foldable piece portion, 60a: Fixed piece portion, 60b: Foldable piece portion, 62: Actuating piece portion, 62a: Base portion, 62b: Protrusion portion, 64: Second spring portion, 141: Guide portion, 221: First pipe, 222: Second pipe, 223: Fixing mechanism, 224, 225: Curved portion

Claims (10)

A main rope replacement aid for replacing a main rope that suspends a car and a counterweight in a 1:1 roping system in an elevator hoistway,
a rod-shaped first member extending in a direction spanning a pair of guide rails for guiding the counterweight;
a pair of second members extending from both ends of the first member along the extending direction of the pair of guide rails;
guide rollers provided at both ends of each of the pair of second members and rolling along the guide rail;
a main rope clamping portion fixed to the first member and clamping the end portion of the main rope while allowing movement in a rotational direction;
An elevator main rope replacement aid equipped with: The first member is
a first pipe having one end fixed to one of the pair of second members;
a second pipe having one end fixed to the other of the pair of second members and the other end slidably inserted into the other end of the first pipe;
a fixing mechanism that fixes the relative position of the second pipe with respect to the first pipe;
2. The elevator main rope replacement aid according to claim 1, comprising: An elevator main rope replacement aid as described in claim 1 or claim 2, wherein each of the pair of second members has a leaf spring structure that biases the guide roller in the direction of the corresponding pair of guide rails. An elevator main rope replacement aid as described in claim 1 or claim 2, wherein the first member has a curved portion bent in a direction away from the existing main rope so as not to interfere with the existing main rope when the guide roller is rolled along the pair of guide rails. An elevator main rope replacement aid as described in claim 1 or claim 2, comprising a lifting wire member one end of which is fixed to the main rope replacement aid. The main rope clamping portion is
a first clamping piece portion having a first clamping surface;
a second clamping piece portion having a second clamping surface, the second clamping surface being opposed to the first clamping surface, and the first clamping piece portion being rotatably connected to the second clamping piece portion via a support shaft;
a switching mechanism that can switch between an allowable state that allows the first clamping surface to separate from the second clamping surface and a restricting state that restricts the separation;
3. The elevator main rope replacement aid according to claim 1 or 2, comprising: The elevator main rope replacement aid described in claim 6 further comprises guide portions provided at the tip ends of the first clamping piece and the second clamping piece, which guide the first clamping surface in a direction away from the second clamping surface when the main rope is pressed from the tip ends toward the first clamping surface and the second clamping surface. A main rope replacement method using a main rope replacement auxiliary tool for replacing a main rope that suspends a car and a counterweight in a 1:1 roping system in an elevator hoistway, comprising:
The main rope replacement aid is
a rod-shaped first member extending in a direction spanning a pair of guide rails for guiding the counterweight;
a pair of second members extending from both ends of the first member along the extending direction of the pair of guide rails;
guide rollers provided at both ends of each of the pair of second members and rolling along the guide rail;
A main rope clamping portion is fixed to the first member and clamps the end of the main rope while allowing movement in a rotational direction,
The main rope replacement method includes:
a first step of fixing the counterweight in place and removing the existing main rope from the counterweight;
a second step of installing the main rope replacement aid between the pair of guide rails;
a third step of clamping an end of the main rope in the main rope clamping portion;
A fourth step of lowering the main rope replacement aid to the specified position;
a fifth step of removing the end of the main rope from the main rope clamping portion and connecting it to the counterweight;
A main rope replacement method comprising: The first member is
a first pipe having one end fixed to one of the pair of second members;
a second pipe having one end fixed to the other of the pair of second members and the other end slidably inserted into the other end of the first pipe;
a fixing mechanism that fixes the relative position of the second pipe with respect to the first pipe,
The second step comprises:
The main rope replacement method according to claim 8, further comprising the step of adjusting the relative position of the second pipe with respect to the first pipe so that the guide rollers contact each of the pair of guide rails, and fixing the second pipe with the fixing mechanism. The main rope replacement aid is
Further provided is a lifting line member having one end fixed to the main rope replacement aid,
The main rope replacement method includes:
The main rope replacement method according to claim 8 or 9, further comprising, after the fifth step, a step of pulling up the main rope replacement aid upward by the pulling-up line member.