JPH04251083A - Return method for emergency stop device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for returning an emergency stop device, and more particularly to a method for returning an emergency stop device for an elevator.

0002

[Prior Art] In an elevator, a car and a counterweight must move up or down in a hoistway at a predetermined speed, and when the moving speed of the car or counterweight exceeds a predetermined value, If the car is not stopped, the elevator will be in a very dangerous situation. Therefore, the elevator is equipped with an emergency stop device that detects when the car moves beyond a predetermined speed and activates the emergency stop device to stop the car in order to prevent danger. This emergency stop device also operates when the car is climbing near the top floor and exceeds the upper limit position, and the counterweight hits the buffer, causing the main rope to temporarily loosen and the car receiving an impact. It's getting old.

[0003] In this way, when the counterweight hits the buffer and the emergency stop device is activated, the counterweight cannot be lowered, so even if the hoist is driven, the car cannot be raised any further. I can't. Conventionally, when the emergency stop device is activated in this way, the car is moved by a chain block for a predetermined distance (for example, 10 minutes).
The emergency stop device was reset by lifting the vehicle (approximately 0 mm).

0004

As described above, when the counterweight hits the buffer and the emergency stop device is activated, it is necessary to lift the car using a chain block. This requires a complicated process in which a chain block is installed on the ceiling of the hoistway, and a worker stands on top of the car and operates the chain block to lift the car, which takes a considerable amount of time. It was necessary.

As mentioned above, the present invention was made in view of the current state of recovery of the emergency stop device when the counterweight hits the buffer and the emergency stop device is activated, and its purpose is to recover the emergency stop device in this case. To provide a method for returning an emergency stop device that can be performed by a simple operation in a machine room where a hoist is installed.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides that a main rope, to which a car is connected at one end and a counterweight at the other end, is wound around a sheep of a hoisting machine, In the method for returning an emergency stop device provided in the car of an elevator in which the car and the counterweight move up and down in opposite directions in a hoistway driven by the hoisting machine, when the emergency stop device is activated. , the main rope is tied to the sheep by a tying means, the sheep is rotated in a direction in which the car ascends, and a binding position by the tying means is directed downward; By shortening the apparent length and raising the car, the emergency stop device is reset.

[0007]

[Function] In this way, in the present invention, even when the counterweight cannot be lowered, the main rope can be tied to the sheep in the machine room, and the main rope can be rotated by the hoisting machine. By shortening the apparent length of the rope, the car can be raised and the emergency stop device can be reset.

[0008]

[Embodiment] An embodiment of the present invention will be described below with drawings (Figs. 1 and 2).
). Here, FIGS. 1 and 2 are explanatory diagrams of an embodiment. In FIG. 1, 1 is a hoistway, and a machine room 6 is provided only above the hoistway 1, and a hoist 7 equipped with a sheep 8 is installed in the machine room 6. In addition to the sheep 8, an auxiliary sheep 8a is rotatably provided in the machine room 6, and a plurality of main ropes 9 are wound around these sheep 8 and the auxiliary sheep 8a. Further, both ends of the main rope 9 are inserted through the openings 6a and 6b provided in the floor wall of the machine room 6.
Cars 2 are suspended in the hoistway 1, and a car 2 is installed at both ends of the hoistway.
and a counterweight 3 are fixed respectively. An emergency stop device 5 is attached to the car 2 to stop the car during operation, and a buffer 4 is attached to a pit at the bottom of the hoistway 1 at a position directly below the counterweight 3.

While the car 2 is climbing near the top floor, it rises beyond the upper limit position, and the counterweight 3 hits the buffer 4, causing the main rope 9 to temporarily loosen, causing the car 2 to receive a shock and break the emergency stop device 5. It is assumed that the car 2 is activated and the car 2 suddenly stops at that position. The counterweight 3 is in contact with the buffer 4, and the counterweight 4 cannot be lowered. Even if the hoist 7 is simply driven, the car 3 will not rise, and the emergency stop device 5 cannot be reset. In order to restore the emergency stop device 5 from such a state, in the embodiment, a worker enters the machine room 6 and first ties and fixes the main rope 9 to the sheep 8 using a wire 10 serving as a binding means. Band together. Next, the hoist 7 is driven so that the car 2 is raised and the position where the main rope 9 is tied to the sheep 8 by the wire 10 (tied position by the binding means) is directed downward, as shown in FIG. Rotate the sheep 8 in the direction. In this way, the length of the main rope 9 between the car 2 and the counterweight 3 can be apparently shorter than before the main rope 9 is fixed to the sheep 8 with the wire 10, Car 2 rises. Then, when the car 2 rises by a predetermined amount (for example, 100 mm 9) from the position where the emergency stop device 5 was activated, the emergency stop device 5 automatically returns to its original position.

In the return work according to the embodiment, a worker ties and fixes the main rope 9 to the sheep 8 with the wire 10 in the machine room, and connects the sheep 8 in the direction in which the car 2 ascends and connects the main rope with the wire 10. 9 to the sheep 8 is simply rotated in a downward direction. There is no need for the worker to get on the car, and the work itself is not complicated and can be completed in a short time.

[0011] In the embodiment, a case has been described in which the main rope is tied and fixed to the sheep using a wire as a binding means, but the present invention is not limited to the embodiment. You can also use

0012

As explained above, the present invention binds the main rope to the sheep using a tying means, and binds the sheep in the direction in which the car ascends, and the tying position by the tying means is By rotating in the downward direction, when the counterweight hits the buffer and the emergency stop device is activated, the emergency stop device can be returned to its original state easily and in a short time.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing a state of wire binding according to an embodiment of the present invention.

FIG. 2 is a diagram showing a rotating state of the sheep after binding with wire according to an embodiment of the present invention.

[Explanation of symbols]

2 Cart 3. Balance weight 4　Batsuhua 5 Emergency stop device 7 Hoisting machine 8 Sheep

Claims (1)

[Claims] Claim 1: A main rope having a car connected to one end and a counterweight connected to the other end is wound around a sheep of a hoist, and is driven by the hoist to connect the car and the counterweight. In the method for returning an emergency stop device provided in the car of an elevator that moves up and down in opposite directions in a hoistway, when the emergency stop device is activated,
tying the main rope to the sheep by a tying means;
rotating the sheep in a direction in which the car is raised and in a direction in which a binding position by the binding means is directed downward, shortening the apparent length of the main rope and raising the car; A method for restoring an emergency stop device, characterized in that the emergency stop device is returned to its original position.