JPH0780655B2 - Elevator rope replacement method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an elevator rope replacement method, and more particularly to an elevator rope replacement method suitable for rope replacement of a high-lift elevator.

[Conventional technology]

Conventionally, in an elevator, as disclosed in, for example, Japanese Patent Laid-Open No. 52-71043, the following rope replacement method has been proposed. That is, an electric winch or the like is installed on the uppermost floor, a required number of rope drums are installed on the lowermost floor, and a new rope is pulled out from this drum, rewound by a predetermined length and cut. Next, one end of the new rope that has been cut is tightly connected to the hoisting rope of the electric winch described above, and is lifted through the counterweight pulley located on the bottom floor, and fixed to the rope stopper of the counterweight. Then, tie the other end of the new rope to the hoisting rope of the electric winch and hang it up, and hang it around the pulley of the car located on the top floor through the hoisting machine sheave and the deflector wheel in the machine room, Temporarily fix it to the stopper. Similarly, other new ropes are also hung one by one and temporarily fixed, and then the other ends of these temporarily fixed are socketed and fixed to the rope stopper of the car.

[Problems to be Solved by the Invention]

By the way, in the conventional elevator rope replacement method as described above, not only an electric winch is required,
In addition to the installation, removal, and securing of the power supply, complicated preparatory work is required, and the hoisting rope of the electric winch is tightly connected to the new rope, and the new rope is hung around the balancing weight pulley. There was a problem that there was a lot of work, and safety and work efficiency were low.

The present invention has been made in view of the above-mentioned conventional circumstances, and an object thereof is to provide an elevator rope replacement method capable of replacing an existing rope with a new rope without requiring an electric winch. is there.

[Means for Solving the Problems]

In order to achieve this object, the present invention is an elevator rope replacement method for replacing an existing rope for suspending a car and a counterweight provided in a hoistway so that it can be moved up and down, with a rope replacement method for an elevator. The upper part of the hoistway is lifted by the hoisting tool, while the counterweight is supported by the lower part of the hoistway, and then the existing rope is held so as not to move by its own weight. Separate it from the car, then cut off one end of each of the existing rope and the new rope placed above the hoistway so that the number of stranded wires is less than half over the specified length and stack them on top of each other. Combine and combine, then separate the other end of the existing rope from the counterweight, while paying out the new rope, the hoist sheave, Wound around the fine deflector wheel, the existing ropes connected to the new rope is recovered at the bottom position of the hoistway, then connecting the one end of the new rope to the car,
The other end is connected to the counterweight.

[Action]

As described above, according to the present invention, the existing rope provided between the car that is hung at the upper part of the hoistway and the counterweight that is supported at the lower part of the hoistway is held in a loose state, and one end of the rope is separated from the car. . Then, by connecting one end of this existing rope and one end of the new rope arranged at the upper position of the hoistway to each other, the existing rope and the new rope are connected, and when the existing rope is paid out, The new rope follows and is hung around the hoisting sheave and the deflecting car. Also, the number of stranded wires of less than half of each of the existing rope and the new rope is overlapped, and the joint part that is connected to each other has an outer diameter dimension equal to or less than the outer diameter of the existing rope or the new rope. Pass through the sheave of the upper machine and the groove of the deflecting car without any problem. In this way, the existing rope is collected at the lower part of the hoistway, and the new rope connected to this existing rope is paid out from the upper part of the hoistway, so that the existing rope can be used without requiring an electric winch. Can be replaced with a new rope.

〔Example〕

Hereinafter, an elevator rope replacement method according to the present invention will be described with reference to the drawings.

1 to 3 are views for explaining an embodiment of an elevator rope replacement method according to the present invention. FIG. 1 is a flow chart showing the replacement procedure, and FIG. FIG. 3 is a vertical cross-sectional view of an essential part of the elevator showing a state where it is unwound, and FIG. 3 is a front view showing a connecting portion of an existing rope and a new rope.

The car 2 provided in the hoistway 1 of FIG. 2 is hoisted at the upper part of the hoistway 1 by a hoisting tool (not shown), while the counterweight 3 is supported at the lower part of the hoistway 1 by the cradle 4. . Further, a machine room 5 above the hoistway 1 is provided with a hoisting machine 7 having a pulley 6, a deflecting wheel 8 arranged in the vicinity of the hoisting machine 7, and the like. The rope 9 is wrapped around. A drum 11 is installed at an upper position of the hoistway 1, for example, the uppermost floor 10, and one end of a new rope 12 wound around the drum 11 is fed into the hoistway 1 through a doorway 13. The rope 12 is connected to the existing rope 9 via a connecting portion 14. In the vicinity of the hoisting machine 7 in the machine room 5, the existing rope 9
Also provided is a rope feeding device 15 capable of holding and feeding the new rope 12 so as to sandwich it. On the other hand, the lower end of the hoistway 1, for example, the drum 17 installed on the lowest floor 16, is attached with the other end of the existing rope 9 pulled out from the hoistway 1 through the doorway 18. This allows the existing rope 9 to be wound up. In addition, the state before embarking on the rope exchange is not shown,
One end of the existing rope 9 is attached to the connecting fitting 19 above the car 2 and the other end is attached to the connecting fitting 20 above the counterweight 3, respectively. 3 is hoisted.

Next, as shown in FIG. 3, the connecting portion 14 between the existing rope 9 and the new rope 12 has one half of each of the existing rope 9 and the new rope 12 over a predetermined length and the number of stranded wires is half. Parts cut off to less than 1, eg 1 each
It is composed of two twisted wires 9a, 12a, and a plurality of pressure-bonded sleeves 9a, 12a, for example, two crimp sleeves 23, 24 provided at the ends of the twisted wires 9a, 12a. The sheathing wires 21 and 22 for preventing loosening are wound around the ends of the new rope 12. The crimp sleeves 23, 24
Is provided with an outer diameter slightly smaller than the outer diameters of the existing rope 9 and the new rope 12, and the twisted wires 9a and 12 are provided in the pressure sleeves 23 and 24.
The outer diameters of these crimping sleeves 23, 24 are set so that when crimping with a inserted, the major diameters of the crimping sleeves 23, 24 are equal to or smaller than the outer diameters of the existing rope 9 and new rope 12. .

In this embodiment, replacement of the existing rope 9 with the new rope 12 is performed according to the replacement procedure shown in FIG. That is, firstly, in step S1, the car 2 is raised to the uppermost floor 10, the counterweight 3 is received by the pedestal 4 below the hoistway 1, and the car 2 is kept above the hoistway 1 until the tension of the existing rope 9 is removed. Lift with a lifting tool (not shown). Next, in step S2, the existing rope 9 is held by the rope feeding device 15, one end of the existing rope 9 is cut off from the connection fitting 19 of the car 2, and then in step S3,
As shown in the figure, the sheathing wires 21 and 22 are wound around one end of the existing rope 9 and the new rope 12, respectively, and the stranded wires 9a and 12a are left over a certain length and the end portions of each are cut off to form a stranded wire. Crimping sleeve 2 by stacking 9a and 12a
Press and bond with 3,24. As a result, the existing rope 9 and the new rope 12 are connected by the connecting portion 14. Then the procedure
Connection fitting for the weight 3 by balancing the other end of the existing rope 9 with S4
Separated from 20 and attached to drum 17 on the bottom floor 16
The rope feeding device 15 is operated by S5 to move the arrow 25 in FIG.
The existing rope 9 is fed in the direction shown by, and the existing rope 9, the connecting portion 14, and the new rope 12 are moved to the lower side of the hoistway 1 through the sheave 6, the deflecting wheel 8, and the existing rope 9 is the drum on the lowermost floor 16.
Winded up to 17. On the other hand, the new rope 12 is sent out from the drum 11 on the bottom floor 10. Next, in step S6, the connecting portion 14 reaching the lower part of the hoistway 1 is cut off, one end of the new rope 12 is attached to the connecting fitting 20 of the counterweight 3, and the drum is placed on the top floor 10.
The other end of the new rope 12 is separated from 11, and the other end is attached to the connecting fitting 19 of the car 2, and the rope feeding device is attached in step S7.
15 is removed, the hoisting of the car 2 by a lifting tool (not shown) is released, the car 2 is lowered, and the cradle 4 is removed.

In the embodiment configured in this way, the existing rope 9 can be replaced with the new rope 12 without requiring an electric winch. Then, the existing rope 9 and the new rope 12 can be connected easily and quickly through the crimping sleeves 23 and 24, and the existing rope 9 and the new rope 12 can be connected.
In the step S3 of connecting and, the one end of the existing rope 9 can be pulled out from the hoistway 1 to the uppermost floor 10 through the entrance / exit 13 to perform the work safely and quickly. Furthermore, the connecting part
Since the outer diameter of 14 is equal to or less than the outer diameter of the existing rope 9 or the new rope 12, it passes through the grooves of the sheave 6 and the baffle wheel 8 without any trouble, and the existing rope 9 is collected and connected to the existing rope 9. Sheave 6 of new rope 12 and deflector 8
It is possible to efficiently circulate it around.

In addition, in this embodiment, of the eight twisted wires of the existing rope 9 and the new rope 12, one twisted wire 9a, 12a is left and the other seven wires are cut off, but the present invention is not limited to this. However, less than half of the eight, that is, any number of stranded wires of 1 to 3 can be left. In the case of a rope with 6 twisted wires, less than half of 6 ropes, that is, 1
You can leave the two or two strands and cut off the other four or five. If more than half of the twisted wires are left, these parts will be overlapped and connected to each other to form a connecting part, the outer diameter of this connecting part will be larger than the outer diameter of the rope, and the groove of the sheave 6 Cannot be passed through.

〔The invention's effect〕

Since the present invention is configured as described above, it is possible to replace an existing rope with a new rope without requiring an electric winch, and therefore, a complicated preparatory work such as setting and removing the electric winch and securing a power source. Can be omitted, and work efficiency can be improved. In addition, the existing rope and the new rope can be connected at the landing on the top floor, while reducing the work in the hoistway such as tightly connecting the hoisting rope of the electric winch and the new rope. Therefore, there is an effect that the rope can be exchanged safely and quickly.

[Brief description of drawings]

1 to 3 are views for explaining an embodiment of an elevator rope replacement method according to the present invention. FIG. 1 is a flow chart showing the replacement procedure, and FIG. FIG. 3 is a vertical cross-sectional view of an essential part of the elevator showing a state where it is unwound, and FIG. 3 is a front view showing a connecting portion of an existing rope and a new rope. 1 …… hoistway, 2 …… car, 3 …… balance weight, 6
...... Sheave, 7 …… Hoisting machine, 8 …… Baffle wheel, 9 …… Existing rope, 9a …… Twisted wire, 10 …… Top floor, 11 …… Drum, 12 …… New rope, 12a …… Twist Line, 14 …… Coupling part, 15 …… Rope feeding device, 16 …… Bottom floor, 17 ……
Drum, 21,22 …… Ceasing wire, 23,24 …… Crimping sleeve.

Claims (1)

[Claims] Claim: What is claimed is: 1. In an elevator rope replacement method for replacing an existing rope for suspending a car and a counterweight, which can be respectively raised and lowered in a hoistway, with a new rope, first, a car is hoisted by a predetermined hoisting tool on the hoistway. On the other hand, the counterweight is supported by the lower part of the hoistway, then the existing rope is held so that it will not move by its own weight, one end of this existing rope is separated from the car, and then the existing rope is removed. , And one end of each of the new ropes assigned to the upper position of the hoistway so that the number of stranded wires is cut to less than half over a predetermined length, and they are overlapped and connected to each other, and then the existing Separate the other end of the rope from the counterweight, and while paying out the new rope, wind the sheave of the hoist,
And hang it around the baffle car and collect the existing rope connected to this new rope at the lower position of the hoistway, then
An elevator rope replacement method, characterized in that one end of a new rope is connected to a car and the other end is connected to a counterweight.