JPH0791012B2 - Driving method of elevator main rope - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for driving a main rope of an elevator, and more particularly to a method for driving a main rope suitable for installation and removal when replacing the main rope.

[Conventional technology]

Generally, the elevator car and counterweight are connected by a main rope through several types of pulleys, and when this main rope becomes old, it must be replaced with a new main rope.
This work needs to be done on a regular basis.

The conventional method of assembling the main rope has been performed as described in JP-A-52-71043. That is, an electric winch or the like is installed in the uppermost elevator hall, and a predetermined number of rope drums are installed in the lowermost elevator hall, and the predetermined length required to pull out the main rope from the rope drum and hang it around it. Just rewind and cut. One end of the cut main rope on the counterweight side is tightly bound to the hoisting rope of the electric winch, and the rope is hung around the counterweight pulley of the counterweight located in the lowermost elevator hall. Fried and fixed to the rope stop rod on the counterweight side. next,
The other end on the car side of the main rope is tightly connected to the hoisting rope of the electric winch and hoisted to the uppermost elevator hall, and it is located on the hoisting machine pulley, warp pulley and uppermost elevator hall provided in the machine room. Sequentially hang it around the car pulley and temporarily fix it to the rope stop rod on the car side.
The rest of the main ropes were also processed in the same way, and the other end of the car side of all the main ropes was socketed and permanently fixed to the rope stop rod on the car side.

[Problems to be Solved by the Invention]

Since the conventional method of driving the main rope of the elevator is as described above, it is necessary to separately install the electric winch, and preparation of the electric winch, installation work, and troublesome preparation work such as securing a power source must be performed. In addition, there is a lot of work in the hoistway, such as tightly connecting the main rope and the hoisting rope, which lacks safety and there is a drawback that the work cannot be performed quickly.

An object of the present invention is to provide a method of driving a main rope of an elevator, which enables safe and quick installation and removal of the main rope.

[Means for Solving the Problems]

In order to achieve the above object, the present invention provides a car and a counterweight that are arranged to be able to move up and down in a hoistway, and a car and a fishing line that are wound around a hoisting machine pulley provided on a hoisting machine. A method of driving a main rope of an elevator, comprising a main rope for connecting a main weight, holding the balancing weight at a predetermined position with the riding basket, and performing a main rope replacement method for an elevator, wherein the main rope replacement operation is performed. During the implementation of the above, a rope pressing device that continuously presses the main rope wound around the hoisting machine pulley against the hoisting machine pulley is provided, and between the rope pressing device and the hoisting machine pulley. It is characterized in that the hoisting machine is driven to move the main rope while holding the main rope.

[Action]

Since the method for driving the main rope of the elevator according to the present invention is performed as described above, when the main rope is assembled and removed, the main rope is continuously hoisted by the pressing device during the replacement work of the main rope. The pulley is pressed against the pulley to increase the frictional force between the main rope and the hoisting machine pulley, so that the main rope wound around the hoisting machine pulley is bounded by the hoisting machine pulley on one end side and the other side. Even if a much larger rope weight is applied, it is possible to move the main rope without slipping by driving the hoisting machine. Therefore, the worker only has to perform auxiliary work such as unwinding or winding the main rope by the rope drum. Further, there is almost no work at a high place in the hoistway, so that the main rope can be replaced safely and in a short time.

〔Example〕

 Embodiments of the present invention will be described below with reference to the drawings.

In a hoistway 21 formed across a number of floors, a car 12 and a counterweight that ascend and descend along a guide rail (not shown).
13 can be raised and lowered. A hoisting machine pulley 1 and a warping pulley 2 that are interlocked with a hoisting machine (not shown) are installed in a machine room 22 formed in the upper part of the hoistway 21, and a plurality of hoisting machine pulleys 1 and warping pulleys 2 are provided. The main rope 5 of the book is hung. A car-side rope socket 8 connected to one end of the main rope 5 is connected via a car pulley 3 to a car-side rope stop rod 10 provided on the floor of the machine room 22. Further, the rope socket 9 on the counterweight side attached to the other end of the main rope 5 is used for the warp pulley 2
And a rope stop rod 11 on the counterweight side provided on the floor of the machine room 22 via a counterweight pulley 4.

When replacing the main rope 5, the worker first holds the car 12 at a predetermined position in the uppermost elevator hall 23, and installs the rope drum 7 in the vicinity thereof. Also, the hoisting machine pulley 1
The rope pressing device 6 is installed while the pressing roller 15 is being pressed. Details of the rope pressing device 6 will be described from the side view of FIG. 2 and the front view of FIG. An unillustrated hoisting machine is fixed on the hoisting machine base 14, and a plurality of main ropes 5 are hung on the hoisting machine pulley 1. Pressure roller
A groove 15 corresponding to the outer shape of the main rope 5 is formed on the outer circumference of the main rope 5 and is rotatably supported by a shaft 16. This shaft 16 is supported by a stand 17, and the stand 17
The mounting bolt 19 with the jack bolt 18 and the compression spring 20
It is fixed to the hoisting machine base 14 by and. When the jack bolt 18 is screwed in, it is locked by the hoisting machine base 14, and when it is screwed in further, the mount 17 is rotated clockwise with the mounting bolt 19 as a fulcrum. As a result, an appropriate holding force corresponding to each main rope is applied.

A method for removing the old main rope having such a structure will be described.

First, hold the counterweight 13 in the lowermost elevator hall 24 with a cradle, and then in the uppermost elevator hall 23,
Lift 12 with a chain block and loosen the main rope 5. Then, the rope pressing device 6 is installed on the hoisting machine base 14 with the mounting bolts 19, and the pressing bolts 15 are screwed in to press the pressing roller 15 against the main rope 5 with an appropriate holding force.

Here, the rope socket 8 on the car side of the main rope 5 is disconnected, and its end is wound around the rope drum 7. Next, the side plate (not shown) of the counterweight pulley 4 is removed, and the main rope 5 is pulled out to the front side of the counterweight 4.

Then, by driving the hoisting machine to rotate the hoisting machine pulley 1, the main rope 5 on the counterweight 13 side is pulled up. If the rope drum 7 is rotated according to the hoisting speed, the rope drum The old main rope is wound around 7. Then, if the main rope 5 is pulled up to the vicinity of the rope socket 9 on the counterweight side, the hoisting machine is stopped, and the connection between the rope socket 9 on the counterweight side and the rope stop rod 11 on the counterweight side is disconnected. . Next, the main rope 5 is cut near the rope socket 9 on the counterweight side, and the socket is separated from the main rope 5. When the remaining main rope 5 is wound around the rope drum 7, the removing work is completed.

Next, a method of incorporating a new main rope will be described.

First, the counterweight 13 is located in the lowermost elevator hall 24 of the hoistway 21.
It is held near a pedestal or the like, and the car 12 is held near the uppermost elevator hall 24 of the hoistway 21 by a chain block or the like.

Then, the rope drum 7 containing the newly installed main rope 5 is installed near the uppermost elevator hall 23, and one end of the main rope 5 is connected to the car pulley 3 ... Hoisting machine pulley 1 ...
... Pass through the warp pulley 2 in order, and incorporate it up to the rope stop rod 11 on the counterweight side, connect the rope socket 9 on the counterweight side to one end of the main rope 5, and connect the rope socket 9 and the rope on the counterweight side. Connect the locking rod 11.

Then, the rope pressing device 6 is brought into close contact with the hoisting machine base 14, the jack bolt 18 is screwed in, the pressing roller 15 is rotated clockwise toward the main rope 5 side, and the main rope 5 is held with a proper force.

Thus, by driving the hoisting machine and rotating the hoisting machine pulley 1, the U-shaped portion of the main rope 5 on the counterweight 13 side is gradually lowered. When the U-shaped portion of the main rope 5 reaches the lowermost elevator hole 24, the hoisting machine is stopped, the side plate (not shown) of the counterweight pulley 4 is removed, and the main rope 5 is installed in the rope groove. If the main rope 5 is slack, reverse the hoist to eliminate the slack. In this state, the main rope 5 from the pressing roller 15 of the rope pressing device 6 to the rope stop rod 11 on the counterweight side is held with an appropriate tension.

Here, the worker determines the length of the main rope 5 in consideration of the amount of elongation of the main rope 5 and cuts it. Its main rope 5
Connect the rope socket 8 on the side of the car to the cut part of and connect it with the rope stop rod 10 on the side of the car. This completes the work of attaching the main rope 5, so that the jack bolt 18 of the rope pressing device 6 is loosened to stop the holding of the main rope 5, and the attaching bolt 19 is removed to remove the rope pressing device 6. Then, the chain block and the pedestal are removed, and the work of assembling and removing the main rope 5 is completed.

According to this embodiment, when a new main rope is installed or an old main rope is removed, even if one end side of the main rope has a larger weight than the other end side, the hoisting pulley and the main rope are The main rope can be hoisted and unwound without slipping between them. Therefore, even in a high-lift elevator where the rope weights acting on both ends of the main rope with the hoisting machine pulley as a boundary are extremely different, the main rope can be assembled and removed easily and quickly.

〔The invention's effect〕

As described above, the present invention is provided with a rope pressing device that continuously presses the main rope wound around the hoisting machine pulley against the hoisting machine pulley during the main rope replacement work. Since the frictional force between the main rope and the hoisting machine pulley was increased by the device, the main rope wound around the hoisting machine pulley is bounded by the hoisting machine pulley, and one of the two ends is located at the other end. Even if a much larger rope weight is applied, the main rope can be moved without slipping by driving the hoisting machine. Therefore, the worker should pay out the main rope from the rope drum,
The main rope can be replaced only by performing an auxiliary work such as winding up, and since there is almost no work at a high place in the hoistway, it can be performed safely and in a short time.

[Brief description of drawings]

FIG. 1 is a transverse cross-sectional view of the vicinity of a hoistway of an elevator showing an embodiment of a method of driving a main rope of an elevator according to the present invention,
FIG. 2 is a side view of a rope pressing device which is a main part of the driving method of the main rope of the elevator, and FIG. 3 is a front view of FIG. 1 …… Hoisting machine pulley, 5 …… Main rope, 6 …… Rope pressing device, 12 …… Car, 13 …… Balance weight, 21 …… Hoistway.

Claims (1)

[Claims] 1. A car and a counterweight which are arranged to be able to move up and down in a hoistway, and a main which is wound around a hoisting machine pulley provided on a hoist to connect the car and the counterweight. A method of driving a main rope of an elevator, which comprises a rope and holds the balancing cage and the counterweight at a predetermined position to replace the main rope, which is continued during the replacement of the main rope. A rope pressing device for pressing the main rope wound around the hoisting machine pulley against the hoisting machine pulley is provided, and the main rope is held between the rope pressing device and the hoisting machine pulley. A method of driving a main rope of an elevator, characterized in that the main rope is moved by driving the hoisting machine.