JPH0818774B2 - How to change the elevator main rope - Google Patents

Description

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

[Prior Art] Conventionally, for an elevator, for example, JP-A-52-7104
As described in Publication No. 3, first, an electric winch or the like is installed on the uppermost floor, and a required number of drums around which the new main rope is wound are installed on the lowermost floor. Pull out, rewind and cut by the length necessary to hang it around, and tie one end of this new main rope to the winch rope of the electric winch described above,
This is hung around the counterweight pulley located at the lowest floor in the hoistway and lifted up, fixed to the rope stopper on the counterweight side, and then the other end of the new main rope is tightly connected to the winch rope described above. Lift it to the top of the road, hang it around the hoisting sheave installed in the machine room, the deflector pulley, and the car pulley located at the top of the hoistway, and temporarily fix it to the car rope stopper. A method of replacing the main rope of the elevator is proposed in which the newly installed main rope is sequentially hung, and then the car-side end portion is socketed and fixed to the car-side rope stopper.

[Problems to be Solved by the Invention] In the conventional elevator main rope replacement method as described above, since an electric winch is specially provided, it is necessary to obtain the electric winch and secure a power source. However, there was a problem that it was troublesome to install and remove it. In addition, when handling the winch rope, there is a relatively large amount of work in the hoistway, such as tightening the winch rope and the main rope, which not only poses a high risk of workers falling, but also makes this work quick. There was also the problem that it was difficult to do.

The present invention has been made in view of such circumstances in the prior art, and an object thereof is to safely and quickly remove an existing main rope and incorporate a new main rope without requiring an electric winch. It is to provide a method for replacing the main rope of an elevator.

[Means for Solving the Problem] In order to achieve this object, the present invention provides a hoisting machine installed in a machine room above a hoistway, and a hoisting machine having an intermediate portion wound around the hoisting machine. At least one main rope suspended in the hoistway and formed in a loop shape, both ends of which are supported on the floor of the machine room, and a pulley engaging with one suspended portion of the main rope. An elevator having a balance and a counterweight that is suspended in the hoistway via this pulley, and a pulley that engages with the other suspension portion in the upper part, and that is suspended in the hoistway via this pulley. In the main rope replacement method for an elevator that is used to replace an existing main rope with a new main rope, first hold one of the elevator car and the counterweight at the lower part of the hoistway and the other hoistway as the hoistway. After being lifted at the upper part, at least between the floor and the one lifting body, at least between the end side portion and the intermediate side portion of the existing main rope located between the floor and one lifting body One central roller, at least one end roller which is arranged in the same horizontal plane as the central roller and parallel to each other, and which can press the end portion between the central roller and the central roller, and the central roller At least one intermediate roller arranged in a horizontal plane and parallel to each other and capable of pressing the intermediate portion with the central roller, and the central roller, the end roller, and the intermediate roller are rotatable. It is equipped with a rope gripping device including a frame that is attached and is supported above the hoistway,
The center roller, end side roller and middle side roller of this rope grasping device grasp the end side part and middle side part of the existing main rope, and in this state grasping the existing main rope above the rope grasping device. Then, separate the existing main rope and the new main rope from the floor, and then drive the hoist to move the existing main rope and the new main rope from the one elevator body side to the other elevator body side. While being transferred, the existing main rope is wound around the drum from the other end on the side of the lifting body, and the new main rope is unwound.

[Operation] As described above, the present invention holds one of the elevators of the car and the counterweight at the lower part of the hoistway, lifts the other elevating part at the upper part of the hoistway, and grasps the rope at the upper part of the hoistway. The rope grasping device is provided with a device for clamping the end side portion of the existing main rope by the center roller and the end side roller, and the middle side of the existing main rope is provided by the center roller and the intermediate side roller. When the end of the existing main rope is cut off from the floor of the machine room above the rope gripping device, the part of the existing main rope is pressed against the end side by its own weight. Even if a downward force is applied to one side of the roller, almost the same downward force is applied to the other side of the central roller due to the weight of the intermediate side part of the existing main rope. Roller does not rotate That is, the end side portion of the existing main rope is held in a state of being pressed by the central roller and the end side roller.

Then, in this way, the end portion of the rope grasping device is grasped by the central roller and the end portion side roller, and the middle portion is grasped by the center roller and the intermediate side roller, respectively, and newly installed at the end portion of the existing main rope. When the main rope is connected and the hoisting machine is operated, the intermediate side part of the existing main rope is pulled up, and an upward force is applied to one side part of the central roller where this intermediate side part is in pressure contact, and The rollers rotate. Along with this, a downward force is applied to the end side portion of the existing main rope that is in pressure contact with the other side portion of the central roller.
In this way, the existing main rope and the new main rope are transferred from the above-mentioned one lifting body side to the other lifting body side. At this time, the existing main rope is wound on the drum and the new main rope is unwound by human power.

Thus, when removing the existing main rope and assembling the new main rope, an electric winch is not required, so that the work in the hoistway is small and the work safety can be improved. Also, as mentioned above, there is less work in the hoistway,
Moreover, since the existing main rope and the new main rope are simultaneously transferred by the drive of the hoisting machine, the work can be speeded up.

[Example] Hereinafter, a method of replacing the main rope of the elevator according to the present invention will be described with reference to the drawings.

1 to 4 are views for explaining an embodiment of a method for replacing a main rope of an elevator according to the present invention. FIG. 1 is a flow chart showing a work procedure, and FIG. 2 is a procedure for removing an existing main rope and a new main rope. A vertical sectional view showing a state where the rope is assembled,
FIG. 3 is a plan view of the rope gripping device, and FIG. 4 is a vertical sectional view of the rope gripping device. Note that FIG. 4 is AA of FIG.
It is sectional drawing which follows the line.

The elevator shown in FIG. 2 has a machine room 2 above the hoistway 1.
And a sheave 3a of the hoisting machine 3, the middle part of which is wound around the hoisting machine 3, and both sides of the hoisting machine 3 are suspended in the hoistway 1 to form loops. Room 2
For example, three existing main ropes 4, which are respectively supported on the floor 2a of the existing ropes via rope stoppers 10 and 11, and a pulley 5 that engages with one suspended portion of the existing main rope 4, are provided in the upper part,
A car 6 that is hoisted in the hoistway 1 via the pulley 5
And a pulley 7 that engages with the other suspended portion at the top,
It has a counterweight 8 that is hoisted in the hoistway 1 via the pulley 7 and a deflecting pulley 9 that is installed in the machine room 2 and around which the existing main rope 4 is wound. Then, when exchanging the main rope, one of the elevator car 6 and the counterweight 8 elevating body, for example, a base for holding the counterweight 8.
12 is arranged in the lower part of the hoistway 1 and the other lifting body, for example, a chain block 13 for hoisting the car 6, and a rope grasping device 14 for grasping the existing main rope 4 above the counterweight 8.
And are provided above the hoistway 1.

This rope grasping device 14 is, as shown in FIG. 3, a floor 2a.
And a counter roller 8 disposed between the end side portion 4a and the intermediate side portion 4b of the existing main rope 4 located between the counter weight 8 and the counterweight 8, and arranged in the same horizontal plane as the center roller 15 and in parallel. And the end portion 4a between the central roller 15 and
Includes an end side roller 16 capable of pressing and an intermediate roller 17 arranged in the same horizontal plane as the central roller 15 and parallel to each other and capable of pressing the intermediate portion 4b between the central roller 15 and the central roller 15. At the same time, as shown in FIG. 4, for example, two other central rollers 15a and 15b configured similarly to the central roller 15 and, for example, two other ends configured similar to the end side roller 16 described above. Part-side rollers 16a, 16b and, for example, two other intermediate-side rollers 17a, 17b configured similar to the intermediate-side roller 17 described above.
And rollers 15 to 17, 15a to 17a, and 15b to 17b are rotatably attached, and a frame 18 supported on the upper part of the hoistway 1.

In addition, the new main rope 20 is installed in the elevator hall 24 in FIG.
A drum 19 around which is wound is installed, and a guide pulley 21 that guides the new main rope 20 is attached to the floor 2a, while a guide pulley 22 that guides the existing main rope 4 to the drum 23 is provided above the car 6. Is installed.

In this embodiment, the existing main rope 4 is replaced with the new main rope 20 according to the work procedure shown in FIG. That is, first, in step S1, the counterweight 8 is held by the platform 12 below the hoistway 1 and the car 6 is held in the chain block 13.
After hoisting by step S2, the rope grasping device 14 is provided on the upper part of the hoistway 1 in step S2, and the rope grasping device 14 is arranged above the counterweight 8. In step S3, the rollers on the end side with respect to the central rollers 15, 15a, 15b
16, 16a, 16b are respectively moved to adjust the inter-roller distance, and the central side rollers 15, 15a, 15b and the end side rollers 16, 16a, 16b move the end side portion 4a. Similarly, the intermediate portion 4b is crushed by the central rollers 15, 15a, 15b and the intermediate rollers 17, 17a, 17b, and the existing main ropes 4 located between the floor 2a and the counterweight 8 are crushed. End side part of
The upper portion of the hoistway 1 is held by 4a and the intermediate portion 4b. Next, in step S4, the end of the existing main rope 4 is separated from the lower portion A of the rope stopper 11, and this end is separated from the new main rope 20.
And connecting to each other, for example at a connection B including a crimp sleeve,
In order to pass this connecting portion B between the rollers of the rope gripping device 14, its outer diameter is prevented from increasing. At this time, a downward force is applied to one side of the central rollers 15, 15a, 15b that are in pressure contact with the end side portion 4a by the weight of the end side portion 4a, but these central rollers 15, 15a, Since almost the same downward force is applied to the other side portion of 15b by its own weight of the intermediate side portion 4b, the central rollers 15, 15a, 15b do not rotate, which results in that the existing main rope 4 does not rotate. Edge side part 4a
Are held in the hoistway 1 in a suspended state. Next, in step S5, the end of the existing main rope 4 on the car 6 side is separated from the lower portion C of the rope stopper 10, and the end of the existing main rope 4 is attached to the drum 23.

Then, in step S6, the hoisting machine 3 is operated at a low speed, the existing main rope 4 is transferred to the car 6 side through the sheave 3a, and the existing main rope 4 is manually wound by the drum 23 and the drum 19 From the new main rope 20. At this time, the middle side portion 4b is pulled up by the rotation of the sheave 3a, and the central rollers 15, 15a, 1 that come into pressure contact with the middle side portion 4b.
An upward force is applied to one side of 5b and the central roller 1
5,15a and 15b rotate. Along with this, the new main rope 20 connected to the existing main rope 4 is simultaneously transferred to the end side portion 4a of the existing main rope 4 downward. In this way, the existing main rope 4 is wound around the drum 23 over the entire length, and the new main rope 20 is wound around the pulley 7 of the counterweight 8, the deflector pulley 9, the sheave 3a of the hoist 3, the pulley 6 of the car 6. After wrapping around 5 in sequence, in step S7, remove the end of the new main rope 20 on the car 6 side from the connection part B and connect it to the lower part C of the rope stop metal fitting 10.
Is cut into a predetermined length, and its end is connected to the lower portion A of the rope stopper 11. Further, the guide pulleys 21 and 22 and the rope grasping device 14 are removed. Next, in step S8, the car 6 is suspended, the chain block 13 is removed, the base 12 that holds the counterweight 8 is also removed, and the car 6 and the counterweight 8 are installed in the hoistway 1 by the new main rope 20. Lift it up to return to the normal state.

In the embodiment configured in this manner, the end side portion due to the disconnection of the end of the existing main rope 4 by the rope grasping device 14
4a can be prevented from falling, and after the new main rope 20 is connected to the above-mentioned end, the existing main rope 4 and the new main rope are held by the hoisting machine 3 while being held by the rope grasping device 14. 20 can be transferred from the counterweight 8 side to the car 6 side. Only the auxiliary work such as winding of the existing main rope 4 and unwinding of the new main rope 20 needs to be performed manually, and the work in the hoistway 1 is relatively small, and the work safety can be improved. Further, as described above, the work in the hoistway 1 is small, and the existing main rope 4 and the new main rope 20 can be simultaneously transferred by driving the hoisting machine,
It is possible to quickly remove the existing main rope 4 and install the new main rope 27.

In this embodiment, the counterweight 8 is held at the lower part of the hoistway 1 and the car 6 is hung at the upper part of the hoistway 1, but instead, the car 1 is held at the lower part of the hoistway 1. It is also possible to hang the counterweight 8 above the hoistway 1.

EFFECTS OF THE INVENTION Since the present invention is configured as described above, the existing main rope can be detached and the new main rope can be incorporated without requiring an electric winch as in the conventional case. At that time, since the winch rope is not handled, the work in the hoistway is relatively small, and the work safety can be improved. In addition to the relatively small work in the hoistway as described above, the existing main rope and the new main rope can be transferred simultaneously by driving the hoisting machine, and the installation and removal of the electric winch and its power supply There is also an effect that the main rope can be quickly replaced with a relatively small amount of labor without requiring a troublesome work such as securing.

[Brief description of drawings]

1 to 4 are views for explaining an embodiment of a method for replacing a main rope of an elevator according to the present invention. FIG. 1 is a flow chart showing a work procedure, and FIG. 2 is a procedure for removing an existing main rope and a new main rope. FIG. 3 is a vertical sectional view showing a state where the rope is incorporated, FIG. 3 is a plan view of the rope grasping device, and FIG. 4 is a longitudinal sectional view of the rope grasping device. 1 ... Hoistway, 2 ... Machine room, 2a ... Floor, 3 ... Hoisting machine, 3a ... Sheave, 4 ... Existing main rope, 4a ... End part, 4b ... Intermediate part 5 ... Pulley, 6 ... Car (other lifting body), 7 ... Pulley, 8 ... Balance weight (one lifting body), 14 ... Rope grasping device, 15,15a, 15b
...... Central roller, 16,16a, 16b …… End side roller, 17,17
a, 17b …… Middle roller, 18 …… Frame, 20 …… New main rope, 23 …… Drum.

Claims (1)

[Claims] 1. A hoist installed in a machine room above a hoist, and a sheave of the hoist having an intermediate portion wound around the hoist, and parts on both sides are suspended in the hoist to form loops. At least one main rope that is formed and whose both ends are supported by the floor of the machine room, and a pulley that engages with one suspended portion of this main rope are provided at the top, and in this way, in the hoistway Used for an elevator that has a lifting car and a pulley that engages with the other suspended part at the top, and has a counterweight that is hoisted in the hoistway via this pulley, and replaces the existing main rope with a new main rope. In the method of replacing the main rope of an elevator, first, hold one of the elevators of the car and the counterweight below the hoistway, and lift the other elevator above the hoistway, and then lift the floor and the one of the above. body Between the floor and one of the lifting bodies, at least one central roller provided between the end side portion and the intermediate side portion of the existing main rope, and in the same horizontal plane as the central roller and Between the central roller and at least one end-side roller that is arranged in parallel and is capable of pressing the end-side portion with the central roller, and arranged in the same horizontal plane as and parallel to the central roller. A rope including at least one intermediate roller capable of pressing the intermediate portion, and a frame on which the central roller, the end roller, and the intermediate roller are rotatably mounted and supported at the upper part of the hoistway. It is equipped with a grasping device, and the center roller, end side roller and middle side roller of this rope grasping device grasp the end side part and middle side part of the existing main rope, and the existing main The rope is separated from the floor above the rope grasping device, then the separated main rope and new main rope are connected, and then the existing main rope and new main rope are driven by the above-mentioned hoisting machine. Main rope replacement of an elevator characterized in that while transferring from one lifting body side to the other lifting body side, the existing main rope is wound from the end of the other lifting body side on the drum and the new main rope is unrolled. Method.