JP2008037624A - Method of replacing main rope for machine room-less elevator of 2:1 roping system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of replacing main ropes for a machine room-less elevator of 2:1 roping system capable of replacing all the main ropes at a time by remarkably reducing the work load of a rope replacement operation. <P>SOLUTION: A car 1 is stopped at the uppermost floor, and suspended by a chain block 18. An old rope 6a is detached from a counterweight side rope stopper 7 and a car side rope stopper 10, and a new rope 6b is connected to one end of the old rope and a dummy rope 17 is connected to the other other end. A roller 21 is attached to the car side rope stopper 10, and the dummy rope 17 is wrapped around the roller 21 and fallen to a pit 2a. The brake of a drive sheave 5 is released, the dummy rope 17 is pulled from the inside of the pit 2a, and the dummy rope 17 and the old rope 6a are pulled down into the pit 2a. Then, the new rope 6b is detached from the old rope 6a, and attached to the counterweight side rope stopper 7 and the car side rope stopper 10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a main rope replacement method in a machine room-less elevator of a 2: 1 roping traction system.

  In a conventional traction type machine room-less elevator, the hoisting machine is installed on the counterweight side of the upper part of the hoistway, and the cage-side leash is installed on the counterbalanced weight side of the upper part of the hoistway. The car-side leash stop is installed at a position above the car-suspending car on the car-side leash beam, and the counterweight-side leash is installed at a position above the counterweight suspension car on the mounting plate of the hoisting machine. ing. Further, main ropes having both ends fixed to the car-side rope clamp and the counterweight-side rope clamp are respectively wound around two car suspension vehicles, a driving sheave of the hoisting machine, and a counterweight suspension vehicle. With this configuration, the car and the counterweight are suspended in a suspending manner by a 2: 1 roping method, and are moved up and down in the reverse direction by the rotation of the driving sheave at half the speed of the main rope. (For example, refer to Patent Document 1).

  In this type of elevator, when replacing the main rope, first, the car is raised to the upper part of the hoistway and the counterweight is fixed. The worker then goes up on the basket with a new rope. Then, the car is lifted, the old rope is slackened, the old rope is removed from the driving sheave, and temporarily placed on a hoisting machine stand or the like. Next, the old rope is balanced and removed from the weight side rope clamp, and the terminal of the removed old rope is connected to the terminal of the new rope. After that, remove the old rope from the cage side rope stop and wind it up while pulling up the old rope. Then, when the terminal of the new rope connected to the terminal of the old rope is pulled up, the connection between the old rope and the new rope is released, and the terminal of the new rope that has been disconnected is attached to the car rope. In addition, the new rope is handed over to the driving sheave, and the terminal on which the new rope remains is balanced and attached to the weight side rope stop. Thereafter, the lifting of the car and the fixing of the counterweight are released, and the replacement of the main rope is completed.

JP 2005-112487 A

  In the conventional elevator main rope replacement method, the operator gets on the car, removes the balance weight end of the old rope from the leash, connects it to the end of the old rope with the new rope removed, and then connects the old rope to the car side. It has been lifted on the cage by removing it from the rope. Then, since an operator pulled up an old rope on a cage | basket | car, the subject that a worker's work load was remarkably large occurred. Moreover, in order to pull up the total number of old ropes at once, it is necessary to raise a maximum of about 50 kg (the rope's own weight), which is practically impossible. Therefore, it is necessary to pull up the old ropes one by one, that is, to replace the old ropes one by one.

  The present invention has been made to solve the above-mentioned problems, and makes it possible to simultaneously collect the old rope and lay the new rope in the work of pulling down the old rope by the worker from inside the pit, thereby significantly increasing the load of replacing the rope. It is an object of the present invention to obtain a main rope replacement method for a machine room-less elevator of a 2: 1 roping method that can be reduced and the total number of main ropes can be replaced at once.

  The present invention includes a drive sheave for a hoist installed in an upper space of a hoistway, a car-side leash stopper and a counterweight-side leash stopper installed in an upper space of the hoistway, and elevating and lowering in the hoistway. A cage weight that moves up and down in the hoistway in the opposite direction to the cage, and both ends are fixed to the cage-side rope clamp and the counterweight-side rope clamp, and two car suspension wheels, the drive rope A main rope replacement method for a machine room-less elevator of a 2: 1 roping method, comprising a main rope wound around a car and a counterweight suspension vehicle. And stopping the car at the top floor or near the top floor, fixing the counterweight to the pit of the hoistway, lifting the car and releasing the tension of the existing main rope, and the existing main rope The ends of the main rope are removed from the cage side brace and the counterweight side leash, and the end of the new main rope is connected to the end of the existing main rope removed from the counterweight side leash. Connecting the end of the dummy rope to the end of the main rope that is to be removed from the cage side brace and further installing the dummy return wheel in the upper space of the hoistway, and the dummy rope to the dummy return wheel And hanging over the pit. A step of lowering the brake of the driving sheave and pulling the new main rope from the car while pulling the dummy rope and the existing main rope into the pit; and the new main rope After the end portion of the new main rope reaches the vicinity of the dummy return wheel, the new main rope is disconnected from the existing main rope, and the end portion is fixed to the car-side rope and the new main rope is fixed. A step of fixing the remaining end portion to the counterweight side rope stop, and a step of lifting the cage and releasing the brake of the drive sheave.

  According to this invention, the newly installed main rope is connected to the end of the existing main rope that has been removed from the counterweight side rope clamp, and the dummy rope is connected to the end of the existing main rope that has been removed from the cage rope. Connected, the dummy rope is passed over a dummy return wheel installed in the upper space of the hoistway and hung in the pit, and the dummy rope is pulled down into the pit. Then, when the existing main rope is pulled down into the pit following the dummy rope, the existing main rope in the laying path of the main rope is replaced with the new main rope. Therefore, by pulling down the dummy rope and the existing main rope into the pit, the main rope is replaced, so that the work load on the operator is remarkably reduced. At this time, since the brake of the driving sheave is released, the driving sheave rotates to reduce the traveling load of the existing main rope and the newly installed main rope, thereby reducing the work load. Therefore, it is possible to replace all the main ropes at once, and it is possible to shorten the time for replacing the main ropes.

  1 and 2 are process diagrams schematically illustrating a main rope replacement method for a machine room-less elevator according to an embodiment of the present invention, and FIG. 3 is a machine room-less elevator according to an embodiment of the present invention. FIG. 4 is a view for explaining a dummy return wheel mounting structure in a main rope replacement method for a machine room-less elevator according to an embodiment of the present invention. FIG. 4A is a front view thereof, and FIG. 4B is a side view thereof.

In the machine room-less elevator, as shown in FIG. 1A, the car 1 is guided by a pair of guide rails 3 extending in the vertical direction in the hoistway 2 and can be raised and lowered in the hoistway 2. It is arranged. The counterweight 4 is guided by a pair of guide rails (not shown) extending in the vertical direction in the hoistway 2 so as to be raised and lowered in the hoistway 2. The counterweight 4 is disposed between the elevator space of the car 1 and the wall surface of the hoistway 2 in order to avoid the elevator space of the car 1.
A drive sheave 5 is disposed at a position above the counterweight 4 in the upper space of the hoistway 2. Although not shown, the drive sheave 5 constitutes a hoisting machine together with a reduction gear, a motor, etc., and is arranged on a hoisting machine mounting base (not shown) installed in the upper space of the hoistway 2. It is installed.

  Moreover, the terminal of the one end side of the main rope 6 is being fixed to the balance weight side rope stop 7 installed in the position above the balance weight 4 of the mount of a winding machine. Then, the main rope 6 is suspended and hung on a balance weight suspension wheel 8 attached to the upper portion of the balance weight 4, and then lifted and hung on the drive sheave 5. Next, the main rope 6 is suspended and hung on two car suspension vehicles 9 installed at the lower part of the car 1. Thereafter, the main rope 6 is raised, and its terminal is fixed to the car-side rope stopper 10 installed in the upper space of the hoistway 2.

  Thus, in this machine room-less elevator, the car 1 and the counterweight 4 are suspended in a slidable manner by a 2: 1 roping method. Then, the driving sheave 5 is rotationally driven by the motor, and the main rope 6 is driven by the frictional force between the driving sheave 5 and the main rope 6. As a result, the car 1 and the counterweight 4 are moved up and down in the reverse direction at a speed that is half the speed of the main rope 6.

Here, the fixing method of the other end side of the main rope 6 will be described with reference to FIG.
As for the cage side rope stopper 10, the shackle rod 11 and the rope socket 12 are comprised integrally. Moreover, the cage-side rope retaining beam 13 is installed, for example, in the upper space of the hoistway 2 across the landing-side hoistway wall and the eaves-side hoistway wall. Then, the shackle rod 11 is passed from below through an insertion hole 13a formed in the car side bracing beam 13, a spring 14 is attached to the extension end, and a nut 15 is screwed to the extension end of the shackle rod 11. The cage-side leash stopper 10 is attached. Further, the main rope 6 is fixed to the rope socket 12 at the other end. In this example, the car 1 and the counterweight 4 are suspended by four main ropes 6.

  In addition, the balance weight side rope clamp 7 is also comprised similarly to the car side rope clamp 10. FIG. In addition, the balance weight side rope clamp 7 is assumed to be attached to the mount of the hoisting machine. You may make it attach to.

  Next, a method for replacing the main rope according to the present invention will be described with reference to FIGS. Here, for convenience of explanation, the existing main rope (old rope) is indicated by a solid line with a symbol 6a, and the new main rope (new rope) is indicated by a dotted line with a symbol 6b.

  First, the car 1 is stopped at the top floor or near the top floor. Then, one worker 30 descends into the pit 2a, and the counterweight 4 is fixed by the pipe support 16 as shown in FIG. Then, as shown in FIG. 1 (c), another worker 31 moves the new rope 6b, dummy rope 17, chain block 18, wire rope 19, wire clip 20, and roller 21 as a dummy return wheel. The car is climbed onto the car 7 and the car 1 and the guide rail 3 are connected by the chain block 18. Then, the car 1 is lifted by the chain block 18. Thereby, the tension of the old rope (existing rope) 6a is released, and the old rope 6a is slackened.

Next, the operator 31 balances both ends of the old rope 6 a and removes them from the weight side rope clamp 7 and the car side rope clamp 10. And the terminal of the other end side of the new rope 6b is connected to the terminal of the one end side of the old rope 6a (the terminal of the removal side from the counterweight side rope stop 7).
Next, as shown in FIG. 4A, one end of the wire rope 19 is passed through one rope socket 12, and one end side of the wire rope 19 is fixed to the rope socket 12 with a wire clip 20. Then, the roller 21 is inserted from the other end of the wire rope 19. Thereafter, the other end of the wire rope 19 is passed through another rope socket 12, and the other end side of the wire rope 19 is fixed to the rope socket 12 with a wire clip 20. As a result, as shown in FIG. 4B, the roller 21 is rotatably attached to the two car side rope clamps 10 via the wire rope 19.

  Next, the worker 31 connects the dummy rope 17 to the terminal on the other end side of the old rope 6 a removed from the car-side rope clamp 10. Then, as shown in FIG. 1D, the worker 31 hangs the dummy rope 17 over the roller 21 and drops it onto the pit 2a. Furthermore, the operator 31 releases the brake of the drive sheave 5 to make the drive sheave 5 rotatable.

  Then, the worker 31 on the car 1 pulls the dummy rope 17 while the worker 30 in the pit 2a pulls out the new rope 6b. Thereby, the connection part 22 of the old rope 6a and the new rope 6b moves along the laying path | route of the main rope 6, and the old rope 6a is gradually replaced by the new rope 6b. As shown in FIG. 2A, when the connecting portion 22 between the old rope 6a and the new rope 6b moves to the vicinity of the roller 21, the laying path of the main rope 6 is almost replaced with the new rope 6b.

  Next, as shown in FIG. 2 (b), the operator 31 fixes the end on one end side of the new rope 6 b to the weight side rope clamp 7. The worker 31 then disconnects the new rope 6b from the old rope 6a and drops the old rope 6a into the pit 2a. Next, as shown in FIG. 2C, the worker 31 fixes the terminal on the other end side of the new rope 6 b removed from the old rope 6 a to the car-side rope stop 10. Next, the operator 31 removes the chain block 18 to release the car 1, lifts the brake of the driving sheave 5, and returns the driving sheave 5 to the braked state. get off. Also, the worker 30 in the pit 2a removes the pipe support 16 to release the balance weight 4, removes the pipe support 16, the dummy rope 17, and the old rope 6a, and the replacement work of the main rope 6 is completed.

  According to this invention, the new rope 6b is connected to the end of the old rope 6a removed from the counterweight side rope stopper 7, and the dummy rope 17 is connected to the end of the old rope 6a removed from the cage side rope stopper 10. The dummy rope 17 is hung on the roller 21 installed in the upper space of the hoistway 2 and hung in the pit 2a, and the dummy rope 17 is pulled down in the pit 2a. When the old rope 6a is pulled down into the pit 2a following the dummy rope 17, the old rope 6a on the laying path of the main rope 6 is replaced with the new rope 6b. Therefore, by pulling down the dummy rope 17 and the old rope 6a into the pit 2a, the main rope 6 is replaced, so that the work load on the operator is remarkably reduced.

  In the above embodiment, the number of old ropes 6a to be replaced at a time is not mentioned. However, as described above, the work load is remarkably reduced according to this replacement method. There is no need to replace all the old ropes 6a, and the new ropes 6b can be replaced at a time. That is, all the old ropes 6a are balanced and removed from the weight side rope clamps 7 and the car side rope clamps 10, the new ropes 6b and the dummy ropes 17 are connected to the respective ropes, and all the dummy ropes 17 are laid over the rollers 21 to pit 2a And all the dummy ropes 17 may be pulled down into the pit 2a. Thereby, the replacement work time of the main rope 6 is remarkably shortened.

Further, since the brake of the drive sheave 5 is released prior to the process of lowering the dummy rope 17 and the old rope 6a into the pit 2a, when the dummy rope 17 and the old rope 6a are lowered into the pit 2a, The driving sheave 5 rotates and the running of the old rope 6a and the new rope 6b becomes smooth. Therefore, the workload of the worker is reduced.
In addition, since the roller 21 is attached to the car-side leash 10, there is no need to newly install a member such as a beam for attaching the roller 21, and the work time can be reduced and the cost can be reduced. .

In the above embodiment, the car 1 is moved to the top floor or near the top floor and stopped, and then the car 1 is connected to the guide rail 3 using the chain block 18 and the car 1 is lifted. The one end of the chain block 18 is not limited to the guide rail 3 but may be connected to the upper part of the hoistway 2.
In the above embodiment, the new rope 6b connected to the old rope 6a is sent out from the top of the car 1. However, the roller 21 is attached to the counterweight side rope stop 7, and the new rope 6b is passed over the roller 21. You may make it send out. In this case, the new rope 6b can be sent out so as not to cause the slack of the main rope between the roller 21 and the counterweight suspension vehicle 8, and there is a problem such as the wheel removal from the counterweight suspension wheel 8 of the main rope. Is prevented.

It is process drawing which illustrates typically the main rope replacement | exchange method of the machine room less elevator which concerns on one embodiment of this invention. It is process drawing which illustrates typically the main rope replacement | exchange method of the machine room less elevator which concerns on one embodiment of this invention. It is a side view explaining the cage side rope stop structure in the machine room less elevator which concerns on one embodiment of this invention. It is a figure explaining the attachment structure of the dummy return wheel in the main rope replacement | exchange method of the machine room less elevator which concerns on one embodiment of this invention.

Explanation of symbols

  1 cage, 2 hoistway, 2a pit, 4 counterweight, 5 drive sheave, 6 main rope, 6a old rope (existing main rope), 6b new rope (new main rope), 7 counterweight side rope clamp, 8 counterweight suspension car, 9 car suspension car, 10 car side rope clamp, 17 dummy rope, 18 chain block, 21 rollers (dummy return car).

Claims (2)

A driving sheave for the hoisting machine installed in the upper space of the hoistway, a car-side leash stopper and a counterweight-side leash stopper installed in the upper space of the hoistway, and a car that moves up and down in the hoistway, A balance weight that moves up and down in the hoistway in the opposite direction to the car, and both ends are fixed to the car side rope clamp and the balance weight side rope clamp, and two car suspension wheels, the drive sheave and the balance weight A main rope replacement method for a machine room-less elevator of a 2: 1 roping method provided with a main rope wound around each suspension car,
Stopping the car at the top floor or near the top floor, fixing the counterweight to the pit of the hoistway, lifting the car and releasing the tension of the existing main rope;
Remove both ends of the existing main rope from the cage side rope clamp and the counterweight side rope clamp, and attach the end of the new main rope to the end of the existing main rope removed from the counterweight side rope clamp. Connecting, connecting the end of the dummy rope to the end of the existing main rope removed from the cage side rope stop, and further installing a dummy return wheel in the upper space of the hoistway;
Spanning the dummy rope over the dummy return wheel and hanging in the pit;
Releasing the brake of the driving sheave and pulling the dummy rope, and further the existing main rope into the pit, while sending out the new main rope from the car;
After the end of the new main rope has reached the vicinity of the dummy return wheel, the new main rope is disconnected from the existing main rope, and the end is fixed to the car-side rope. Fixing the remaining end portion of the newly established main rope to the counterweight on the counterweight side;
Lifting the car and releasing the brake of the drive sheave,
A 2: 1 roping type machine room-less elevator main rope replacement method characterized by comprising:   2. The main rope replacement method for a machine room-less elevator of 2: 1 roping method according to claim 1, wherein the dummy return wheel is attached to the cage side rope clamp from which the existing main rope is removed.

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