JPH0818773B2 - 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. Rewind and cut only the length required to pull it out and hang it around, and tie one end of this new main rope to the winch rope of the electric winch described above, which is the balance weight at the lowest floor position in the hoistway. The hoisting sheave installed in the machine room, hung around the pulley and fixed to the rope balance fitting on the counterweight side, and then fastened the other end of the new main rope to the above winch rope and hung it above the hoistway. Hook it around the deflector pulley and the car pulley located above the hoistway to temporarily fix it to the car rope stopper. Then, a method of replacing the main rope of an elevator has been proposed in which other newly-established main ropes are also sequentially wound in the same manner and then the car-side end portion is socketed to be 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 took a lot of time and trouble to install and remove it. Also, when handling the winch rope, there is relatively much work to be done in the hoistway, such as tightening the winch rope and the main rope, and there is a high risk of workers falling and the work is done quickly. It was also 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 hoist installed in a machine room above a hoistway, and a sheave of the hoist having an intermediate portion wound around both sides thereof. Is suspended in the hoistway to form a loop, and both ends are supported by at least one main rope supported on the floor of the machine room, and one suspension portion of the main rope is engaged with the main rope. An elevator having a pulley that is installed in the upper part of the hoistway, a carriage that is hoisted in the hoistway via the pulley, and a pulley that engages with the other suspension part, and a counterweight that is hoisted in the hoistway through the pulley. In the method of replacing the main rope of the existing main rope with the new main rope of the elevator main rope,
First, hold one of the elevators of the car and the counterweight at the lower part of the hoistway, and hang the other elevating part at the upper part of the hoistway, and then place the floor between the floor and the one elevating body. And at least one pair of end side rollers capable of grasping the end side portion of the existing main rope located on the side of the one lifting body, and the intermediate side portion of the existing main rope between the sheave and the one lifting body. At least one pair of intermediate-side rollers that can be grasped, a frame body to which these end-side rollers and intermediate-side rollers are rotatably attached, and which is supported at the upper part of the hoistway, and the end-side rollers and intermediate-side rollers are provided. A rope grasping device having interlocking means for interlocking with each other is arranged, and the existing main rope is grasped by the end side rope and the intermediate roller of this rope grasping device, and the existing main rope is grasped by the rope grasping device in this state. Is separated from the floor at an upper part of the, then the separated main rope and new main rope are connected, and then the existing main rope and the new main rope are driven by the hoisting machine from the one elevator body side to the other While being transferred to the lifting body, the existing main rope is wound around the drum from the other end on the lifting body side, and at the same time, 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. A device is provided, the end side roller of this rope grasping device sandwiches the end side part of the existing main rope, the middle side roller sandwiches the middle side part of the existing main rope, and these end side roller and middle side roller Are connected to each other via interlocking means, the end of the existing main rope is separated from the floor of the machine room above the rope grasping device, and the self-weight of this end side portion applies a rotational force to the end side roller. However, the intermediate portion does not move, and the rotation of the intermediate roller is blocked. Along with this, the rotation of the end side roller is prevented via the interlocking means, that is, the end side portion of the existing main rope is held in a state grasped by the end side roller and falls in the hoistway. Is prevented. Then, after connecting the new main rope to the end of the existing main rope with the rope grasping device grasped by the rope grasping device as described above, when the hoisting machine is operated, the intermediate side portion and the end side of the existing main rope are The parts move together, the intermediate side roller and the end side roller rotate while interlocking with each other via the interlocking means, and the existing main rope and the new main rope are transferred from the one elevator body side to the other elevator body side described above. . At this time, the existing main rope is wound on the drum and the new main rope is unwound by human power. This eliminates the need to handle the winch rope of the electric winch when removing the existing main rope and assembling the new main rope, which reduces the work in the hoistway and improves work safety. . Further, as described above, the work in the hoistway is small, and the existing main rope and the new main rope are simultaneously transferred by the driving of the hoisting machine, so that 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 an elevator main rope replacement method according to the present invention. FIG. 1 is a flow chart showing a work procedure, and FIG. 2 is an installation of 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. Incidentally, FIG. 4 shows A in FIG.
It is sectional drawing which follows the -A 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.

As shown in FIG. 4, this rope grasping device 14 includes an end side portion 4a of the existing main rope 4 between the floor 2a and the counterweight 8.
For example, three pairs of end side rollers 15,15a, 16,16a, 17,17a facing each other via the intermediate side portion 4b of the existing main rope 4 between the deflecting pulley 9 and the counterweight 8 are respectively provided. For example, three pairs of intermediate rollers 18, 18 facing each other
a, 19,19a, 20,20a and these end side rollers 15 to 17,15a
-17a Intermediate side rollers 18 to 20, 18a to 20a are rotatably attached, and are provided between the frame body 21 supported at the upper part of the hoistway 1 and the end side roller 15 and the intermediate side roller 18, and these The end side roller 15 and the intermediate side roller 18 are linked with each other by interlocking means 22 and the like. The end side roller described above
The roller 15 is arranged between the end portion 4a and the intermediate portion 4b of the existing main rope 4 and engages with the end portion 4a.
The other roller 15a that faces the end portion 4a is arranged in substantially the same horizontal plane as the roller 15 and is movable toward the end portion 4a. The other end side rollers 16, 16a and 17, 17a provided below the end side rollers 15, 15a have the same configuration. On the other hand, the intermediate side roller 18 is arranged between the intermediate side portion 4b and the end side portion 4a of the existing main rope 4 and engages with the intermediate side portion 4b, and faces the roller 18 via the intermediate side portion 4b. The other roller 18a is arranged in substantially the same horizontal plane as the roller 18 and is movable toward the intermediate portion 4b. The intermediate rollers 19, 19a and 20, 20a have the same configuration except that they are provided below the intermediate rollers 18, 18a. Further, as shown in FIG. 4, the interlocking means 22 provided between the end side roller 15 and the intermediate side roller 18 has sprockets 23 and 24 mounted on the respective shafts of the rollers 15 and 18, and these. The chain 25 is wound around the sprockets 23 and 24, and the rollers 15 and 18 are interlocked with each other via the interlocking means 22 and can rotate in the same direction. Similarly, interlocking means (not shown) is provided between the other end side rollers 16 and 17 and the intermediate side rollers 19 and 20, respectively.

Then, a new main rope is installed in the elevator hall 26 in FIG.
A drum 28 around which 27 is wound is installed, and a guide pulley 29 for guiding the new main rope 27 is attached to the floor 2a and supported at a position above the rope grasping device 14. On the other hand, a guide pulley 30 for guiding the existing main rope 4 to the drum 31 is attached to the upper portion of the car 6.

In this embodiment, the existing main rope 4 is replaced with the new main rope 27 according to the work procedure shown in FIG.
That is, first, in step S1, the counterweight 8 is moved to the hoistway 1.
After holding the car 6 at the lower part by the platform 12 and hoisting the car 6 at the upper part of the hoistway 1 by the chain block 13, a rope grasping device 14 is provided at the upper part of the hoistway 1 as a step S2, and the car 6 is arranged above the counterweight 8. By moving the rollers 15a, 16a, 17a toward the end side portion 4a of the existing main rope 4 as S3, the distance between the rollers is adjusted to adjust the other rollers 15, 16,
The end side portion 4a is pinched between 17 and 17, and similarly, the middle side portion 4b is pinched by the three pairs of the intermediate side rollers 18 to 20 and 18a to 20a, whereby the existing main rope 4 is fixed. Grasp above the counterweight 8. Next, as step S4, the end A of the existing main rope 4 on the counterweight 8 side is separated from the rope stopper 11 above the rope grasping device 14, and the drum is attached to this end A.
A new main rope that is extended from 28 through a guide pulley 29
Connect 27. At this time, the rotational force is applied to the end side rollers 15 to 17 and 15a to 17a by the own weight of the end side part 4a separated at the end A, but the middle side part 4b does not move, and the middle part 4b does not move. The rotation of the intermediate rollers 18 to 20 that press the side portion 4b is prevented. Along with this, the rotation of the end side roller 15 and the like is blocked via the interlocking means 22, so that the end side portion 4a is held in the hoistway 1 in a suspended state without dropping. Then, as step S5, the end B of the existing main rope 4 on the car 6 side is separated from the rope stopper 10, and the end B is attached to the drum 31 via the guide pulley 30.

Then, in step S6, the hoisting machine 3 is operated at a low speed,
While transferring the existing main rope 4 to the car 6 side through the sheave 3a, the existing main rope 4 is wound by the drum 31 by the human power and the new main rope 27 is paid out from the drum 28. At this time, when the intermediate side portion 4b rises in the direction shown by the arrow 32 in FIG. 2 as the sheave 3a rotates, the intermediate side rollers 18, 19, 20 respectively rotate in the clockwise direction in FIG. The end side rollers 15, 16, 17 are also rotated in the clockwise direction in FIG. 4 via 22 and the like, and the end side portion 4a is equivalent to the intermediate side portion 4b in the direction shown by the arrow 33 in FIG. It descends at the moving speed. In this manner, the existing main rope 4 is wound around the drum 31 over the entire length, and the new main rope 27 is wound around the pulley 7 of the counterweight 8, the deflecting pulley 9, the sheave 3a of the hoisting machine 3, and the pulley 5 of the car 6. Then, in step S7, the end of the new main rope 27 on the car 6 side is separated from the existing main rope 4 and connected to the rope stopper 10, and the new main rope 27 is cut to a predetermined length. The end of the lever is connected to the rope stopper 11 above the counterweight 8. Also, guide pulleys 29, 30
And remove the rope holding device 14. Next, in step S8, the car 6 is suspended, the chain block 13 is removed, and the table 12 holding the counterweight 8 is also removed. Then, the car 6 and the counterweight 8 are hoisted in the hoistway 1 by the new main rope 27 to restore the normal state.

In the embodiment configured as described above, the rope grasping device 14 can prevent the end side portion 4a from being dropped due to the disconnection of the end A of the existing main rope 4, and connect the new main rope 27 to the end A described above. After that, the new main rope 4 and the new main rope 27 can be transferred from the counterweight 8 side to the car 6 side through the rope grasping device 14 by driving the hoisting machine 3. At this time, it is sufficient to manually wind the existing main rope 4 and unwind the new main rope 27, that is, perform auxiliary work on the elevator hall 26 side, and the work in the hoistway 1 is relatively small. Work safety can be improved. Further, as described above, since the work in the hoistway 1 is small and the existing main rope 4 and the new main rope 27 can be simultaneously transferred by the hoisting machine 3, the existing main rope 4 can be quickly removed and the new main rope 27 can be transferred. The rope 27 can be incorporated.

When connecting the new main rope 27 to the end A of the existing main rope 4 in the above-mentioned step S4, this connection point can pass between the rollers 15 to 20 and 15a to 20a of the roller grasping device 14 without any trouble. The ropes 4 and 27 are connected while keeping the outer diameter of the rope at a predetermined value. In this embodiment, of the car 6 and the counterweight 8, one lifting body and the counterweight 8 are held in the lower part of the hoistway 1 and the other lifting body, the car 6 is hoisted in the upper part of the hoistway 1. However, contrary to this case, the car 6 may be held below the hoistway 1 and the counterweight 8 may be lifted above the hoistway 1.

EFFECTS OF THE INVENTION Since the present invention is configured as described above, the existing main rope can be removed and the new main rope can be incorporated without requiring an electric winch as in the conventional case. Further, at that time, since the winch rope is not handled, the work in the hoistway can be relatively small, and thus the work safety can be improved. And, as mentioned above, there is little work in the hoistway, the existing main rope and the new main rope can be transferred simultaneously by the hoisting machine, and the troublesome work of installing and removing the electric winch and securing its power supply is required. Therefore, there is also the effect that the main rope can be replaced quickly with relatively little effort.

[Brief description of drawings]

1 to 4 are views for explaining an embodiment of an elevator main rope replacement method according to the present invention. FIG. 1 is a flow chart showing a work procedure, and FIG. 2 is an installation of an existing main rope and a new main rope. A longitudinal 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. 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 elevator), 7 ... Pulley, 8 ... Counterweight (one elevator), 14 ... Rope grasping device, 15-17,15a
〜17a …… End side roller, 18〜20,18a〜20a …… Middle side roller, 21 …… Frame, 22 …… Interlocking means, 27 …… New main rope, 31 …… 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 It is used for elevators that have a suspended car and a pulley that engages with the other suspended part in the upper part, 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 at least one pair of end-side rollers capable of grasping the end-side portion of the existing main rope located between the floor and one of the elevators, and the existing between the sheave and the one of the elevators. At least one pair of intermediate rollers capable of grasping the intermediate portion of the main rope, a frame body to which the end roller and the intermediate roller are rotatably attached, and which is supported at the upper part of the hoistway, and the end portion. A rope grasping device having interlocking means for interlocking the side roller and the intermediate side roller is arranged, and the existing main rope is grasped by the end side roller and the intermediate side roller of the rope grasping device. Disconnect the existing main rope from the floor above the rope grasping device, then connect the separated existing main rope to the new main rope, and then drive the hoist to drive the existing main rope and The main rope is transferred from the one lifting body side to the other lifting body side, the existing main rope is wound around a drum from the other end of the lifting body side, and at the same time, the new main rope is fed out. Elevator main rope replacement method.