JPH07137955A - Method of replacing tail cord for elevator - Google Patents

Abstract

PURPOSE:To safely replace an existing tail cord with a new tail cord without the provision of a scaffold in an elevator shaft, by enabling a worker rides on an elevator car to manipulate an additionally provided manipulator so as to move the car up and down. CONSTITUTION:The operation of an elevator car 3 is controlled by a control panel 5 in a machine room 1 in the upper part of an elevator shaft. If at least a part of tail cords 6 provided between the control panel 5 and the car 3 is replaced, the control panel 5 and a car control device 20 are connected together, and the control device 20 is suspended down to the upper part of the car 3. Then, the worker rides on the car 3, and disconnects one end of an existing movable tail cord 9 from an intermediate connecting box 8 which is then connected thereto with one end of a new movable rail cord, and thereafter, the control part 23 is manipulated to lower the car 3 down to the lower part of the shaft 2. The other end of the existing tail cord 9 is disconnected from the connecting box 10 within a pit 2, and the other end of the new tail cord is connected to the connecting box 10.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator tail cord replacement method.

[0002]

2. Description of the Related Art Generally, in an elevator, a control panel installed in a machine room above the hoistway and a tail cord provided between the cars that are controlled by the control board and hoist in the hoistway are provided. ing. Some of the tail cords are directly connected to the control panel, and some of the tail cords are connected to the control panel via an intermediate connection box fixedly provided at an intermediate height position of the hoistway wall. In this latter tail cord, a stationary tail cord is provided between the intermediate junction box and the control panel, and a movable tail cord is provided between the intermediate junction box and the junction box at the bottom of the car. There is.

Conventionally, for example, when exchanging the movable tail cord, the car is stopped at the intermediate height position of the hoistway, and the operator who gets on the upper part of the car from the above intermediate junction box. Disconnect one end of the existing movable tail cord and connect one end of the new movable tail cord, and then the worker leans out from the hoistway landing and connects the other end of the existing movable tail cord to the bottom of the car. It was designed to be detached from the box and the other end of the new movable tail cord to be connected to this junction box. In addition, if it is difficult for a worker to lean out from this platform and perform work, assemble a scaffold from the platform into the hoistway, and on this platform, the worker should disconnect the other end of the existing movable tail cord from the car. Then, the other end of the new movable tail cord was connected.

As a technique related to this type of conventional technique, for example, a technique disclosed in Japanese Patent Laid-Open No. 295388/1988 can be cited.

[0005]

By the way, in the above-mentioned conventional elevator tail cord replacement method, when the existing movable tail cord is disconnected from the junction box at the bottom of the car and the new movable tail cord is connected, Since the worker leans out from the landing of the hoistway and works, there is a problem that this work is not only difficult but also the safety of the worker is lacking. Further, when assembling the scaffolding from the hall to the hoistway, there is a problem that this assembling requires troublesome work.

The present invention has been made in view of the actual situation in the prior art as described above, and an object thereof is to facilitate replacement work on the side of a car without assembling a scaffold in a hoistway. Another object of the present invention is to provide an elevator tail cord replacement method that can be performed safely.

[0007]

In order to achieve this object, the present invention is directed to a control panel installed in an upper part of a hoistway and a board which is controlled by the control board and hoists in the hoistway. In an elevator tail cord exchanging method for exchanging at least a part of a tail cord provided between cars, a car operating device for operating the car is connected to the control panel, and the car operating device of the car operating device is connected. The operation part is hung down to the upper part of the car, and the operator who rides on the upper part of the car disconnects one end of the existing tail cord from the control panel side and connects one end of the new tail cord to the control panel side. After that, the car is lowered to the lower part of the hoistway by operating the operation part, and a worker enters the pit of the hoistway and the other end of the existing tail cord is connected to the bottom of the car. Disconnected from the connection box, it is in the configuration of connecting the other end of the new tail code to this junction box.

[0008]

As described above, according to the present invention, when the existing tail cord is replaced with the new tail cord, the operator rides on the upper part of the car and performs the replacement work on the control panel side, and then the car is moved up and down the hoistway. As the worker enters the pit of the hoistway and carries out the replacement work on the car side, the worker leans out of the hoistway hall to perform the replacement work on the car side. It can be performed easily and safely as compared with the case of performing it. In addition, as described above, the car is lowered to the lower part of the hoistway, and the worker enters the pit of the hoistway to perform the replacement work on the car side. You don't need to.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of an elevator tail cord replacement method according to the present invention will be described below with reference to the drawings. FIG. 1 is a flow chart for explaining an embodiment of an elevator tail cord exchanging method according to the present invention, and FIG. 2 is a longitudinal sectional view showing a state in which the control panel side exchanging work is performed by the tail cord exchanging method explained in FIG. FIG. 3 is a vertical cross-sectional view showing a state in which the work of replacing the car on the side of the car is performed by the method of replacing the tail cord described in FIG.

Generally, in an elevator, as shown in FIG. 2, a machine room 1 is provided above a hoistway 2 and a car 3 is hoisted in the hoistway 2. This car 3 is the hoistway 2
It is guided by a guide rail 4 installed upright. A control panel 5 for controlling the operation of the car 3 is installed in the machine room 1, and the car 3 is connected to the control panel 5 via a tail cord 6.

The tail cord 6 is a stationary tail cord 7 fixed to the wall surface of the hoistway 2 by a fixing member 7a.
And a movable tail cord 9 that hangs in the hoistway 2. Both ends of the stationary tail cord 7 are connected to a control panel 5 and an intermediate junction box 8 fixed at an intermediate height position of the hoistway 2, respectively. Connected to a connection box 8 and a connection box 10 fixed to the bottom of the car 3,
The middle part of the movable tail cord 9 is held by the hanger 11 at the bottom of the car 3. In addition, the car 3 above is
The hoistway 2 is designed to go up and down between the uppermost floor 12 and the lowermost floor 13.

When the movable tail cord 9 is exchanged by the tail cord exchanging method of this embodiment, as shown in FIG. 2, a car operating device 20 which is connected to the control panel 5 and operates the car 3 is provided. To be This car operating device 20
Is a main body 21 installed in the machine room 1, and the main body 21
Cable 2 with one end connected to and suspended in the hoistway 2
2 and an operation unit 23 connected to the other end of the cable 22
The operation unit 23 includes a rising button (not shown) that outputs a rising signal of the car 3 and a descending button (not shown) that outputs a falling signal of the car 3.

In this embodiment, for example, the existing movable tail cord 9 is replaced with a new movable tail cord (not shown) according to the work procedure shown in FIG. That is, in step S1, the car 3 is stopped near the uppermost floor 12, the car operating device 20 is connected to the control panel 5, and the operating unit 23 is operated via the cable 22 of the car operating device 20. While hanging down to the top of 3,
As shown in FIG. 3, the operator who has stepped on the upper portion of the car 3 as step S2 grips the operating portion 23 and operates the lowering button (not shown), so that the upper portion of the car 3 has the intermediate junction box. The car 3 is lowered to a predetermined height position slightly lower than 8. Next, as a step S3, after the worker on the car 3 disconnects one end of the movable tail cord 9 from the intermediate junction box 8 and connects one end of a new movable tail cord (not shown) to the intermediate junction box 8. In step S4, the operator operates the lowering button of the operation unit 23 again to move the car 3 to the vicinity of the lowest floor 13 (the worker is from the top of the car 3 to a floor above the lowest floor 13). 14), and as the procedure S5, the operation part 23 is hung in the pit 2a of the hoistway 2 and then the above-mentioned worker is placed on the car 3 from the bottom floor 13 Open the hall door (not shown) on the first floor above the floor 14 and get off to this floor 14.

Then, in step S6, the worker is at the bottom floor 1
3, the landing door (not shown) of the car 3 is opened and the car 3 is lowered from the lowest floor 13 into the pit 2a, and the lowering button of the operation unit 23 is operated again to further lower the car 3 to the bottom of the car 3. The car 3 is stopped at a position where it is easy to work in the connection box 10 and the hanger 11 part. In step S7, the operator in the pit 2a disconnects the other end of the movable tail cord 9 from the junction box 10 at the bottom of the car 3 and the junction box 10
Connect the other end of the new movable tail cord to, and operate the lift button of the operation unit 23 in step S8 to operate the car 3
Is raised to the above-mentioned floor 14, the worker exits from the pit 2a to the lowest floor 13, and in step S9, the worker removes the car operating device 20 from the control panel 5 in the machine room 1 and the cable 22 Then, the operation section 23 is pulled up into the machine room 1 and is returned to the normal operation mode to complete a series of replacement work.

In the embodiment thus constructed, the car 3
The movable tail cord 9 can be easily and safely replaced from inside the pit 2a of the hoistway 2 as compared with the case where the worker performs the exchanging work on the side of the hoistway from the hoistway. . In addition, as described above, the car 3 is connected to the hoistway 2
Down to the lower part of the
Since the work is carried out inside, there is no need to assemble a scaffold in the hoistway 2 and no complicated labor is required.

In this embodiment, the case where the movable tail cord 9 is exchanged is illustrated, but when the stationary tail cord 7 is exchanged, the operator on the car 3 is operated by the operating section 2.
3 to move the car 3 up and down the hoistway 2 to remove the fixing member 7a and replace the stationary tail cord 7 with a new stationary tail cord (not shown). Is fixed to the wall surface of the hoistway 2 by a fixing member 7a.

[0017]

Since the present invention is configured as described above, it is not necessary for an operator to lean out from the hoistway landing, and the tail cord replacement work on the car side can be performed easily and easily. You can do it safely. Further, at this time, since it is not necessary to assemble a scaffold in the hoistway, it is possible to save troublesome labor.

[Brief description of drawings]

FIG. 1 is a flowchart illustrating an embodiment of a method for replacing a tail cord of an elevator according to the present invention.

FIG. 2 is a vertical cross-sectional view showing a state in which replacement work is performed on the control panel side by the tail cord replacement method described in FIG.

FIG. 3 is a vertical cross-sectional view showing a state in which the car is replaced by the tail cord replacement method described in FIG.

[Explanation of Codes] 1 Machine room 2 Hoistway 2a Pit 3 Car 5 Control panel 6 Tail cord 7 Stationary tail cord 8 Intermediate connection box 9 Movable tail cord 10 Connection box 20 Car operating device 23 Operation part

Claims (1)

[Claims] 1. A control panel installed in a machine room above the hoistway, and at least a part of a tail cord provided between the cars controlled by the control panel and hoisting in the hoistway. In the method of replacing the tail code of an elevator, a car operating device for operating the car is connected to the control panel, and the operating part of the car operating device is hung down to the upper part of the car and the car is operated. An operator who rides on the top of the car disconnects one end of the existing tail cord from the control panel side, connects one end of the new tail cord to this control panel side, and then operates the operation section to raise and lower the car. Lower it to the bottom of the road, a worker enters the pit of this hoistway, disconnects the other end of the existing tail cord from the junction box at the bottom of the car, and connects the new tail to the junction box. A method for replacing a tail cord of an elevator, characterized in that the other end of the cord is connected.