JP2000118908A - Main rope exchange method for elevator and main rope hold tool used in this method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a main rope exchange method for elevator reducing work time by using a compact and inexpensive main rope hold tool having a simple structure. SOLUTION: In a main rope exchange method for elevator, a car and a new main rope 6a are held using a main rope hold tool 32 which increases a tightly binding force acting on the new main rope 6a as a load applied between the car and the new main rope 6a increases. This main rope hold tool 32 is a net having a hollow tubular part 32b constituted by braiding strings like a hollow tube, a hanger part 32a which is an endless ring is provided at one end of the hollow tubular part, and an inside diameter of the hollow tubular part 32b is reduced by applying a tensile force between the other end 32c of the hollow tubular part 32b and the hanger part 32a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of exchanging a main rope of an elevator, and more particularly to a method of exchanging an old main rope of an existing 1: 1 roping elevator with a new main rope. It is about.

[0002]

2. Description of the Related Art In recent years, high-rise buildings such as office buildings and hotels have increased, and elevators have been installed in special places such as chimneys of thermal power plants. In such a tall structure, replacement of the main cable is necessary, but stopping the elevator for a long time due to replacement of the main cable or the like causes inconvenience to the user and is not preferable.

In an elevator installed in such a place, usually, 6 to 10 main ropes are wound around a sheave of a hoist. Also, both ends of each main rope are respectively connected to steel cages by alloy processing, and the tips of the cages are fixed to the upper beams of the car and the upper portions of the counterweights, respectively.

FIG. 7 is a cross-sectional view showing a state in which a main elevator of a conventional elevator is being replaced with a main rope similar to that shown in, for example, JP-A-63-282081 and JP-A-63-282022. In the drawing, 1 is a hoistway, 2 is a machine room provided above the hoistway 1, 3 is a hoisting machine installed in the machine room 2, 4 is a deflecting wheel provided in the machine room 2,
Reference numeral 5 denotes a control panel similarly installed in the machine room 2.

[0005] Reference numeral 6 denotes a plurality of (in this example, six) old main ropes wound around the sheave and the deflector wheel 4 of the hoisting machine 3, and 7 is provided in the hoistway 1. A car suspended at one end, 8 is provided in the hoistway 1, and a counterweight suspended at the other end of the old main rope 6, 9 is fixed on the upper beam of the car 7 and above the counterweight 4. Is a cage that has been
Each of them holds the terminal of the old main rope 6.

Reference numeral 10 denotes a winch pulley mounted on the ceiling of the hoistway 1, reference numeral 11 denotes a wire winch installed on the uppermost floor, and reference numeral 12 denotes a wire drawn from the wire winch 11. Is connected to the middle of the old main rope 6 via a winch pulley 10 via a rope suspending jig 13. Reference numerals 14 and 15 denote sling wires and chain blocks for suspending the car 7 from the ceiling of the hoistway 1.

Reference numeral 16 denotes a main rope supplying device installed on the lowest floor, and a new main rope 6a is wound around the main rope supplying device 16. Reference numeral 17 denotes a shock absorber installed in the pit 1a at the bottom of the hoistway 1, reference numeral 18 denotes a weight support beam provided in the pit 1a, and supports the counterweight 8, and reference numeral 19 denotes a work spanned from the pit 1a to the top of the counterweight 8. It is a ladder.

Next, a conventional main cable exchanging method will be described. First, the car 7 is stopped on the top floor, enters the pit 1a, and measures the gap size between the lower part of the counterweight 8 and the shock absorber 17 on the weight side. Next, the counterweight 8 is raised and the car 7 is lowered until the weight receiving beam 18 enters below the counterweight 8. Then, when the gap in which the weight receiving beam 18 enters is reached, the weight receiving beam 18 is arranged below the counterweight 8, and the car 7 is raised to place the counterweight 8 on the weight receiving beam 18.

On the other hand, on the car 7, the slinging wire 14 and the chain block 15 are attached, and the upper beam of the car 7 is lifted by the chain block 15. Next, counterweight 8
The old main rope 6 on the side is located at almost the same height as the upper end of the car 7,
Fixed to the rope holding jig 60 attached to the hoistway wall,
At the intermediate cutting point 28 just above, all the old main ropes 6 are cut. Next, only one old main rope 6 is cut at the upper end cutting point 27 immediately above the cage 9 fixed to the upper beam on the car 7 side, and the cut old main rope 6 is wound up and removed in the machine room 2. . Such an operation is repeated by the number of the old main ropes 6, and the upper portions of all the six old main ropes 6 are removed. Then, the cage 9 on the car 7 side is removed from the upper beam of the car 7.

Next, the worker climbs the work ladder 19,
At the lower end cutting point 29 immediately above the retainer 26 on the counterweight 8 side, all the old main ropes 6 are cut, and the retainer 26 is
Remove from Then, on the basket 7, the rope hanging jig 1
One of the old main ropes 6 hanging from the rope holding jig 60 is fixed at a position below the rope holding jig 60, and the same as the old main rope 6 fixed to the rope hanging jig 13. The old main rope 6 is released from the rope holding jig 60. Then, the wire winch 11 is driven to lower the old main rope 6, and the old main rope 6 is removed at the landing on the lowest floor 25. Such an operation is repeated for the number of the old main ropes 6, and the remaining part of all the old main ropes 6 is removed.

After the old main rope 6 is removed, the new main rope 6a wound around the main rope feeder 16 is attached to the winch wire 12 and the rope suspending jig 13 with a margin, and the wire winch is provided. 11 is driven to pull up the new main rope 6a. Then, when the upper end of the new main rope 6a is located at substantially the same height position as the upper end of the car 7, the wire winch 11 is stopped, the upper end of the new main rope 6a is removed from the winch wire 12, and it is lowered from the machine room 2 (not shown). The upper end of the new main rope 6a is connected to the hemp rope. Then, the wire winch 11 is operated to further pull up the new main rope 6a, and at the same time, the hemp rope dropped from the machine room 2 is pulled up to the machine room 2 so that the upper end of the new main rope 6a is
, The new main rope 6a is wound up at the same time as the lifting. When the rope suspending jig 13 comes to a position substantially the same as the upper end of the car 7, the wire winch 11 is stopped, the new main rope 6 a is wound around the sheave and the baffle 22 of the hoisting machine 3, and the terminal is connected. After the alloy is processed and the cage 9 is attached, the cage 9 is fixed to the upper beam of the car 7. After the new main rope 6a is fixed to the car 7, the new main rope 6a is cut at a specified size above the counterweight 8, and the terminal is processed and fixed in the same manner as the car 7 side. This operation is repeated for the number of the new main ropes 6a, and the operation of attaching the new main ropes 6a is completed.

[0012]

In such a conventional method of exchanging the main ropes of an elevator, since the work of removing and attaching the old main ropes 6 composed of a plurality of ropes is performed one by one, the work time is long. However, there is a problem that the elevator suspension time becomes longer. In addition, in an existing building, the installation place of the wire winch 11 is often limited, and there is a problem that it may be difficult to secure the installation place. For example, in the case of chimneys, suspension bridge supports, and the like, there is no middle floor or the top floor required by the conventional rope replacement method, so that this method cannot be applied in many cases. Furthermore, recently, the top floor of a hotel or the like is covered with carpets at a restaurant or an observation floor, so that there has been a problem that the top floor cannot be used at the time of construction.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has reduced the working time by using a small, inexpensive, and simple structure main rope holder. An object of the present invention is to obtain a method of exchanging a main rope of an elevator.

[0014]

In order to achieve the above-mentioned object, according to the method for exchanging a main rope of an elevator according to the present invention, a car is stopped at a lower end of a hoistway and a new main rope is moved near a lower part of the hoistway. , And one end thereof is held in a car by using a main rope holding device in which the binding force acting on the new main rope increases as the load applied between the cage and the new main rope increases. A sufficient margin is formed between the car part and the tip so that the tip of the new main rope can be connected to the car through the hoist in the machine room when the car is located near the upper end of the hoistway; , And raise the car to the upper end of the hoistway with the new main rope, and simultaneously lower the counterweight to the lower end of the hoistway, hold the car and the counterweight in their respective positions, and raise and lower the old main rope. Hold and fix at the top of the road and cut the old main rope above the fixed position Both were removed separately from the basket, the margin part of the new main rope, connecting from through the hoist to the basket,
Remove the main rope holder of the new main rope held in the cage, separate the other end of the old main rope from the counterweight, connect the other end of the new main rope to the counterweight, and fix it to the upper end of the hoistway Connect one end of the remaining old main rope to the car, release it from fixing at the upper end of the hoistway, lower the car and lower the old main rope connected to the car at the lower end of the hoistway from the lower end. It is to be collected.

Further, according to the method for exchanging main ropes of an elevator according to the present invention, the main rope holder is a net having a hollow tubular portion in which a cord is braided in a hollow tubular shape, and has an endless ring at one end. In addition, the present invention is characterized in that it is provided with a hanging part connected to the car.

Further, according to the main rope holder used in the method for exchanging the main rope of an elevator according to the present invention, a net having a hollow tubular portion in which a cord is braided in a hollow tubular shape is provided at one end of the hollow tubular portion. An endless ring as a hanging portion is provided, and the inner diameter of the hollow tubular portion is reduced by applying a tensile force between the other end of the hollow tubular portion and the hanging portion.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a sectional view showing a method of exchanging a main rope of an elevator according to an embodiment of the present invention. FIG. 2 shows the details of the method of exchanging the main rope of the elevator according to the first embodiment of the present invention, and FIGS.
(J) is a schematic diagram showing each step. FIG. 3 is a configuration diagram around the main rope holder shown in FIG. 1, and FIG.
It is an enlarged plan view of the main rope holder shown in FIG. FIG. 5 is a perspective view of an eye clamp that holds an old main rope on the hoistway counterbalance weight side. FIG. 6 is a view showing the rope holding jig of FIG. 1, wherein FIG. 6 (a) is an exploded perspective view and FIG. 6 (b) is a partially enlarged view. 1 to 6, the same or corresponding parts as those in FIG. 7 are denoted by the same reference numerals, and description thereof will be omitted. In FIG. 1, reference numeral 32 denotes a main rope holder hung on the upper beam of the car 7;
A rope storage device that is placed on the ceiling of the basket 7 to keep a margin for the new main rope, 36 is the same main rope supplier as the main rope supplier 16 installed on the lowest floor 25, Have been. Each of these main rope feeders 36 has a new main rope 6a.
Is wound.

FIG. 4 is an enlarged view showing the main rope holder 32 of FIG. As shown in the figure, the main rope holder 32 is a net including a hollow tubular portion 32b braided into a hollow tubular braid. At one end of the hollow tubular portion 32b, there is provided a hanging portion 32a having an endless ring. New main rope 6a
The main rope holder 32 is inserted from the side of the lifting part 32a so that the lifting part 32a of the main rope holder 32 is positioned at the upper end, and the main rope holder 32 is moved to the holding position. The extension of the main rope holder 32 is predicted, and the other end 32c of the hollow tubular portion 32b is wound around the new main rope 6a by the bind wire 40. When the hanging hand portion 32a is pulled in the direction of the arrow f, the tubular main braid holder 32 extends in the direction of the arrow and has a smaller inner diameter, and is closely attached to the periphery of the new main rope 6a. 6a, and the new main rope 6a is held.
That is, the main rope holding device 32 is a net formed by braiding a cord into a hollow tube, and includes a hanging portion 32a which is an endless ring at one end of the net, and a hollow tubular portion fixed at 40 by a bind wire. By applying a tensile force between the other end 32c of the 32b and the hanging portion, the inner diameter of the hollow tubular net is reduced, and the new main rope 6a is held.

FIG. 3 is a diagram showing the configuration around the main rope holder 32 shown in FIG. In the figure, a hook 72a at one end of a wire 72 with hooks at both ends having hooks 72a attached at both ends is attached to a hanging portion 32a of a main rope holder 32 through which a new main rope 6a penetrates. . A hook 72b at the other end of the wire 72 with both ends hooks is attached to a wire 71 having both ends fixed to the upper beam of the car 7. Therefore, the new main rope 6a is connected to the hanging part 32 of the main rope holder 32.
By means of “a”, the car 7 is held by the upper beam of the car 7 via the wire 72 and the wire 71 with hooks at both ends. In order to prevent the main rope holder 32 and the new main rope 6a from being damaged at the corners 7a of the car 7, a patch cloth is provided between the car 7 and the main rope holder 32.

FIG. 5 is a perspective view of a guide rail portion on the hoistway counterweight 8 side. As shown in FIG.
An eye clamp 57, which is a wire having a wire 7 a, is attached by winding the guide rail 35 on a mounting metal 51 fixed vertically to the guide rail 35.

FIG. 6 is a structural view showing the rope holding jig 60. FIG. 6A is a perspective view, and FIG. 6B is an enlarged view of a part thereof.
The rope holding jig 60 includes a rectangular plate-shaped mounting plate 63,
A U-shaped hanging device 70 attached to the mounting plate 63 with special bolts 61 and nuts 62, and a rope chuck 69 attached to the mounting plate 63 with U-shaped hanging devices 65, bolts 66, nuts 67, and wires 68 are provided. I have. The rope holding jig 60 is hung below the eye clamp 57 attached around the guide rail 35 via a U-shaped hanger 70, and is disposed inside the opposing guide rail 35. The rope chuck 69 is useful because the main cable can be easily attached and detached quickly, reliably, and is useful. However, since the main cable may be damaged, it is used only for holding the old main cable 6 and the new main cable 6 is used.
It is desirable not to use it for a.

Next, the main rope replacement method according to the first embodiment of the present invention will be described with reference to a sectional view during construction of FIG. 1 and a main sectional view of the construction procedure of FIG. First, as a work preparation, the car 7 is stopped on the uppermost floor, which is the upper end, and enters the pit 1a in that state, and the lower part of the counterweight 8 and the shock absorber 17
Measure and record the gap size with the tip of the. This gap size is used as a standard for calculating the set value of the length of the new main rope 6a in order to match the inspection standard of the Building Standard Law. After measuring the gap size, the worker exits the pit 1a. Next, a wire 72 with hooks at both ends is placed on the car 7 from the upper beam of the car 7 via the wire 71. Then, the lock switch 33 of the landing door on the lowest floor 25 is short-circuited by a short-circuit line so that the elevator can be operated even when the elevator door is open. FIG. 2A is an equivalent diagram.

Next, the main rope feeders 36 around which the new main ropes 6a to be replaced are wound are prepared for the number of replacements of the new main ropes 6a (six in this example), and these are placed on the lowest floor. Then, the new main rope 6a is pulled out from the main rope supply device 36 by a length obtained by adding the length of the margin of the new main rope to the installation length of the main rope holding tool 32, and from the end of the new main rope 6a. The main rope holder 32 is inserted and the main rope holder 32 is changed to the new main rope 6a while leaving a sufficient length.
And keep it tight. Here, the spare portion of the new main rope is the main rope portion between the fixed portion by the main rope holding tool 32 and the tip of the new main rope 6a, and when the car 7 is located near the upper end of the hoistway. This is a portion having a sufficient length so that the tip of the new main rope 6a can be connected to the car 7 through the hoist in the machine room. The car 7 is raised by about 2 m from the lowest floor so as not to hinder the pulling of the new main rope 6a, and the car 7 is stopped. A hemp rope (not shown) is dropped from the car 7 to the pit 1a of the hoistway 1 at one end. Next, the door of the lowest floor landing is opened, the door is fixed so that the door is not closed, and the hemp rope is pulled out to the landing. Connect the tip of the new main rope 6a with the drawn hemp rope, pull up the hemp rope on the car 7, raise the new main rope 6a on the car 7 by an extra length, and hook one end of the wire 72 with both ends hooks. The new main rope 6a is held by suspending the hanging portion 32a of the main rope holder 32 holding the new main rope 6a on the 72a. Next, the margin of the new main rope 6 a is stored in the main rope storage tool 31.
Even if it is not stored in the main rope storage device 31, it may be placed in a place on the car 7 that does not hinder the work, or may be placed in the room of the car 7. Such a work is repeated for the number of the new main ropes 6a, and the entire number is held by the wires 72 with hooks at both ends, and the margin is stored in the main rope storage tool 31. FIG. 2B is an equivalent diagram.

At the lowest floor 25, the car 7 is raised to the top floor while the new main rope 6a is drawn from the main rope supply device 36. When the worker arrives at the top floor, the worker enters the pit 1a and receives the weight receiving beam 18 from the landing. Next, the car 7 is signaled from the pit 1a, and the car 7 is lowered until the weight receiving beam 18 enters below the counterweight 8, and the counterweight 8 is raised. And if it becomes a gap into which the weight receiving beam 18 enters,
The weight receiving beam 18 is arranged below the counterweight 8, the car 7 is raised, and the counterweight 8 is set on the weight receiving beam 18 to hold the counterweight 8. FIG. 2C is an equivalent diagram.

Next, the current position of the car 7 is marked on the guide rail, and then based on the new gap size after the main rope replacement calculated from the gap size measured at the pit 1a.
The position of the catch allowance of the car 7 is marked on the guide rail, and the slinging wire 1 lowered from the machine base of the machine room 2
4. A slinging wire 14 and a chain block 15 are attached to the upper beam of the car 7, and the upper beam of the car 7 is lifted by the chain block 15 to the position indicated by the mark and held at that position. As a result, all the old main ropes 6 are in a state of hanging around. At this time, it is preferable that the car 7 is stopped by operating an emergency stop device for stopping the elevator car 7 on the rail under predetermined conditions. FIG.
(D) is an equivalent figure.

Next, the guide rail 3 on the counterweight 8 side
At 5, the rope holding jig 60 is attached at a position substantially equal to the upper end of the car 7. And the old main rope 6 on the counterweight 8 side
Is entirely held by the rope holding jig 60, and the entire old main rope 6 is cut at the intermediate cutting point 28 immediately above the rope holding jig 60. FIG. 2E is an equivalent diagram.

Then, one retainer 9 attached to the upper beam of the car 7 is removed, and the main rope storage device 3 on the car 7 is removed.
1, one spare portion 6b of the main rope is taken out, and the end of the old main rope 6a above the middle cutting point 28 on the counterweight 8 side of the removed old main rope 6 and the end of the new main rope 6a are removed. Connect with clips not shown. Next, the old main rope 6 on the counterweight 8 side connected in the machine room 2 is pulled up. When the new main rope 6a connected to the old main rope 6 is pulled up to the machine room 2, the new main rope 6 is further moved.
Pull the margin of a into the machine room 2 and remove the clip. Next, the old main rope 6 of the cage 9 removed on the car 7 side is pulled up and removed. Then, in the machine room 2, the spare portion 6b of the raised new main rope 6a is wound around the sheave and the deflector wheel 22 of the hoisting machine 3, the terminal is processed, and the retainer 9 is fixed to the new main rope 6a. The new main rope 6 a with the retainer 9 is lowered onto the car 7 and connected to the upper beam of the car 7. This operation is repeated for the number of the main ropes 6, and all of the upper part of the old rope 6 is removed and the new rope 6a is removed.
To the upper beam of car 7. Next, the new main rope 6a thus connected to the car 7 releases the holding by removing all the main rope holders 32 from the wires 72 with hooks at both ends. Main rope holder 32
Is removed, the main rope holder 32 is released from holding the new main rope 6a, and the main rope holder 3 is released.
2 is dropped to the pit along the new main rope 6a and removed from the lower end, and the holding of all the new main ropes 6a by the wires 72 with both ends hooks is released. FIG. 2F is an equivalent diagram.

Next, the worker enters the pit 1a, places the work ladder 19 on the upper end of the counterweight 8, climbs the work ladder 19, and places the old master directly above the retainer 26 fixed to the upper part of the counterweight 8. At the lower end cutting point 29 of the rope 6, the old main rope 6
, And the cage 26 is also removed from the upper part of the counterweight 8. At the upper part of the counterweight 8, the length of the new main rope 6a is set, and the entire length of the new main rope 6a is cut to the set value. Then, similarly to the car 7 side, the cut ends are processed and the retainers 26 are fixed, and all of them are fixed on the counterweight 8 in the same arrangement as before. After that, release the safety gear and chain block 1
5 is lowered so that the tension of the new main rope 6a is evenly applied to the car 7 and the hanging jig of the car 7 such as the chain block 15 is removed. Thereafter, the car 7 is lowered to raise the counterweight 8, and the weight receiving beam 18 is released and removed, and at the same time, the tools and jigs of the pit 1a are removed, and the worker also exits from the pit 1a. Next, on the car 7, all the old main ropes 6 held by the rope holding jig 60 on the counterweight 8 side are
A link is formed by passing a wire (not shown) through the hole 68a above the hooked wire 68 and fastening both ends of the wire with a clip (not shown) to form a link. 32a is detached and attached and held on the empty hook 72a, the car 7 is raised, and the old main ropes 6 on the counterweight 8 side are moved to all the cars 7 and held. As a result, the load on the eye clamp 57 is eliminated, and the U-shaped hanging member 6 is removed.
5 can be easily removed, and the mounting plate 63 and the old main rope 6 can be removed.
And the old main rope 6 is held in the car 7. FIG.
(G) is an equivalent figure.

The remaining members of the rope holding jig 60 at the upper end of the hoistway, the tools and jigs in the machine room 2 are removed from the car 7 (excluding the wires 71 and the wires 72 with hooks at both ends), and the car 7 is connected. Then, while lowering the car 7, when the terminal below the old main rope 6 comes near the floor of the pit 1a, the car 7 is stopped. Then, all the terminals below the old main rope 6 are taken out to the floor of the lowest floor 25, and the entire main rope 6 is wound while the car 7 is further lowered. FIG. 2H is an equivalent diagram.

Then, the car 7 stops the car 7 in front of the middle floor, descends further while confirming that the counterweight 8 does not hit the rope chuck 69, and the car 7 is moved about 2 m before the lowest floor 25. Stop. Next, all the old main ropes 6 held by the rope chuck 69 on the car 7 are released, and all the old main ropes 6 are dropped into the pits 1a. After that, the old main rope 6 is taken up again and all the cords are removed. FIG.
(I) is an equivalent figure.

Next, the wire 71 on the car 7, the wire 72 with hooks at both ends, and the like are removed, the short-circuit wire of the lock switch 33 on the lowest floor 25 is removed, and test operation and inspection and adjustment of the tension of the new main rope 6a are performed. Do. FIG. 2 (j) is an equivalent diagram. Thus, the main cable replacement work is completed.

In this method of exchanging the main rope, a method of removing the main rope holder 32 from the new main rope 6a has been described. However, other methods are also possible. The method is as follows. With the main rope holder 32 attached to the new main rope 6a, the lower end cutting point 29 of the old main rope 6 immediately above the retainer 26 fixed to the upper part of the counterweight 8 is used. , And the cage 26 is also removed from the counterweight 8. Above the counterweight 8, the length of the new main rope 6a is set, and the entire length of the new main rope 6a is cut to the set value. Then, the cut ends are processed and the retainers 26 are fixed, and all of them are fixed on the counterweight 8 in the same arrangement as before. Thereafter, all of the bind wires 40 that wind and fasten the new main rope 6a and the main rope holder 32 are removed, and the new main rope 6a is removed.
a, the tightening of the main rope holder 32 is released, and the main rope holder 32 is released.
Are dropped onto the counterweight 8. And basket 7
Is lowered to stop the car 7 near the same position where the upper part of the counterweight 8 and the upper part of the car 7 are at the same position.
The main rope holder 32 that has fallen in the vicinity is fixed to the new main rope 6a with vinyl tape or the like. This main rope holding tool 32 can be used for holding the old main rope at the next main rope replacement.

According to such a method of exchanging main ropes, the old main ropes 6 and the new main ropes 6a are collectively removed and attached using a small, inexpensive, and simple main rope holder. Therefore, the working time is greatly reduced, and in the case of the most common elevator, it can be reduced by about 30% compared with the conventional case. Also,
There are few working places, such as the landing on the lowest floor 25, the hoistway 1, and the machine room 2, and it is possible to work in a limited building where the landing on the top floor or the middle floor cannot be used or there is no structure. It can be applied to any existing building, especially effective for chimney elevators.

[0034]

As described above, according to the elevator main rope replacement method of the present invention, the car is stopped at the lower end of the hoistway, a new main rope is placed near the lower part of the hoistway, and one end of the new main rope is placed near the hoistway. The car is held by using a main rope holding tool in which the binding force acting on the new main rope increases as the load applied between the cage and the new main rope increases, and the cage is held between the holding portion and the tip. Is formed near the upper end of the hoistway so that the tip of the new main rope can be connected to the car through the hoist in the machine room. Raise to the upper end of the hoistway with the new main rope, at the same time lower the counterweight to the lower end of the hoistway, hold the car and the counterweight in their respective positions, and hold and fix the old main rope at the upper end of the hoistway. And cut the old main rope above the fixed position and remove it from the car , Connect the spare part of the new main rope to the car through the hoist, remove the main rope holder of the new main rope held by the car, separate the other end of the old main rope from the counterweight, Connect the other end of the main rope to the counterweight, connect one end of the remaining old main rope fixed to the upper end of the hoistway to the car, release from fixing at the upper end of the hoistway, and lower the car The old main rope connected to the car is collected from the lower end at the lower end of the hoistway. Therefore, a small, inexpensive, and simple structure of the main rope holder makes it possible to easily replace multiple main ropes in all existing buildings, and to perform work safely and quickly. In addition, the suspension time of the elevator can be reduced. In addition, since the landing other than the lowest floor is not used during the operation, there is an effect that the main rope can be replaced even in an elevator having severe stopping conditions.

According to the method for exchanging main ropes of an elevator according to the present invention, the main rope holding tool is a net having a hollow tubular portion formed by braiding a cord into a hollow pipe.
Since one end is provided with an endless ring and a hanging portion connected to the car, the main rope can be easily replaced by the main rope holder with a small, inexpensive, and simple structure.

According to the main rope holder used in the method for exchanging main ropes of an elevator according to the present invention, a net having a hollow tubular portion in which a cord is braided in a hollow tubular shape is provided at one end of the hollow tubular portion. It is provided with a hanging part which is an endless ring, and the other end of the hollow tubular part, and by applying a tensile force between the hanging part, the inner diameter of the hollow tubular part is reduced, so it is small, inexpensive, and It is possible to provide a main rope holder having a simple structure.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a method for exchanging a main rope of an elevator according to a first embodiment of the present invention.

FIG. 2 shows details of an elevator main rope replacement method according to Embodiment 1 of the present invention, and FIGS. 2 (a) to 2 (j) are schematic views showing respective steps.

FIG. 3 is a configuration diagram around a main rope holder shown in FIG. 1;

FIG. 4 is an enlarged plan view of the main rope holder shown in FIG.

FIG. 5 is a perspective view of an eye clamp for holding an old main rope on the hoistway counterweight side shown in FIG. 1;

FIG. 6 is a view showing the rope holding jig of FIG. 1;
6A is an exploded perspective view, and FIG. 6B is a partially enlarged view.

FIG. 7 is a sectional view showing a conventional method of exchanging a main rope of an elevator.

[Explanation of symbols]

1 hoistway, 2 machine room, 3 hoisting machine, 6 old main rope, 6
a New main rope, 6b extra part, 7 cages, 8 counterweights, 32 main rope holders, 32a hanging parts, 32b hollow tubular part.

Claims (3)

[Claims] 1. A car is stopped at a lower end of a hoistway, a new main rope is placed near a lower portion of the hoistway, and one end of the new main rope is connected to the lower end of the hoistway.
The load between the above car and the new main rope increases
Main ropes with increasing binding force acting on the new main ropes
Hold using a holder,  The above-mentioned car is located near the upper end of the hoistway between the holding part and the tip.
When positioned, the tip of the new main rope passes through the hoist in the machine room.
Form a sufficient margin so that it can be connected to the above basket.
Holding the spare part in the car, raising the car together with the new main rope to the upper end of the hoistway,
Sometimes the counterweight is lowered to the lower end of the hoistway. With the above basket
Cut off the new main rope, pass the extra part through the hoist
Connect to the car, remove the main rope holder of the new main rope held by the above cage,
Separate the other end of the old main rope from the counterweight and
Connect the other end of the main rope to the counterweight and connect one end of the remaining old main rope fixed to the upper end of the hoistway.
Connect to the above car, release from fixing at the top of the hoistway, lower the car
While lifting the old main rope connected to the car from the lower end
The elevator is characterized in that it is collected at the lower end of the downcomer.
Main rope replacement method. 2. The main rope holding device is a net having a hollow tubular portion in which a cord is braided in a hollow tubular shape, and has an endless ring at one end and a hanging hand portion connected to the car. The method according to claim 1, further comprising the step of: 3. A net having a hollow tubular portion formed by braiding a string into a hollow tubular portion, comprising a hanging portion, which is an endless ring, at one end of the hollow tubular portion; A main rope holder, wherein the inner diameter of the hollow tubular portion is reduced by applying a tensile force to the hanging portion.