JPH08198545A - Abnormality detecting device for elevator-wiring cable - Google Patents

Abstract

PURPOSE: To stop operation of an elevator in the case of a wiring cable being caught by equipment or the like in an elevator shaft while not stopping operation in the case of normal travel even if the own weight of the wiring cable applied to a bracket differs in large degree at the time of a car being positioned on the uppermost floor of a building. CONSTITUTION: An abnormality detecting device for elevator-wiring cable is provided with a car 1 elevated in an elevator shaft, a bracket 2 provided at the lower face of the car 1 through an elastic body 5, and a displacement detecting device 6 with one end fitted to the bracket 2, for detecting the displacement of the distance between the lower face of the car 1 and the bracket 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for detecting an abnormality in a wiring cable for an elevator, and more particularly to an abnormal situation in which a wiring cable is caught by a device in a hoistway and pulled, and the wiring cable is cut. The present invention relates to an elevator wiring cable abnormality detection device suitable for preventing the above problems.

[0002]

2. Description of the Related Art As an abnormality detecting device of this type, one end is attached to a mounting portion in a hoistway and the other end is attached to a lower surface of a car as shown in Japanese Patent Laid-Open No. 60-258078. A wiring cable is provided, and a mounting bracket for mounting this wiring cable on the lower surface of the car is supported via an elastic body, and a load detector consisting of a micro switch for detecting the displacement of this elastic body is mounted on the lower surface of the car. It is known that it is provided in.

[0003]

In the above load detector, the mounting member is pulled downward and the elastic body is largely displaced. In other words, when the mounting member is separated from the lower surface of the car by a predetermined distance or more, it operates to stop the elevator. Is done. Therefore, when the elevator device is installed in a tall building, for example, a building on the 10th floor, the weight of the wiring cable applied to the mounting bracket when the car is located on the 10th floor, which is the top floor, and the bottom Since the weight of the wiring cable applied to the mounting bracket when the car is located on the first floor, which is the floor, is significantly different, a large load can be detected depending on the change in the elastic body due to the change in the weight of the wiring cable during normal running of the elevator. It is difficult to prevent the vessel from working.

An object of the present invention is to operate an elevator in a normal traveling state even if the weights of wiring cables applied to the mounting brackets are greatly different when the car is located on the top floor of the building. Elevator that can prevent an abnormal situation such as disconnection of the wiring cable by stopping the elevator operation without stopping the operation and when the wiring cable is caught on the equipment in the hoistway for some reason. An object of the present invention is to provide an abnormality detection device for a distribution cable.

[0005]

[Means for Solving the Problems] The above-described object is to provide a car that is raised and lowered in a hoistway, a mounting bracket provided on the lower surface of the car through an elastic body, one end of the mounting bracket, and the lifting bracket. It is provided on either one of the wiring cable with the other end attached to the mounting part in the road and the mounting bracket or the lower surface of the car, and detects the displacement of the distance between the lower surface of the car and the mounting bracket. And a displacement detection device that operates to stop the elevator operation only when the displacement of the distance exceeds a specified value.

[0006]

According to this structure, in the normal running of the elevator, the displacement of the distance between the lower surface of the car and the mounting bracket exceeds the specified value even when the top-floor car of the hoistway installed in a tall building is located. Since there is no elevator operation will not stop.

Further, when the wiring cable is greatly shaken by an earthquake or a strong wind during traveling of the elevator and the wiring cable is caught on a device in the hoistway, it is strongly pulled by the wiring cable and is used as a mounting bracket. The displacement of the distance from the bottom of the car becomes large. Therefore, the displacement detection device detects the displacement and the displacement detection device operates. Therefore, with the wiring cable hooked on the equipment in the hoistway,
Elevator operation is no longer performed, and elevator operation can be stopped.

[0008]

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

As shown in FIG. 1, a car 1 is provided in the hoistway 10 so as to be lifted and lowered. A mounting bracket 2 is provided on the lower surface of the car 1 through an elastic body 5 as shown in FIG. The wiring cable 3 for electrically connecting the inside and the outside of the car of the car 1 has one end 3a for the fitting 2 and the other end 3b for the connection box 4 provided in the hoistway 10.
Each is installed. A displacement detector 6 including a displacement sensor for detecting a displacement of the distance X between the lower surface of the car 1 and the mounting bracket 2 is attached to the mounting bracket 2.

As shown in FIG. 3, the control circuit 11 of the displacement detecting device 6 sets a value exceeding the displacement of the distance X1 when the car 1 is located on the top floor of the hoistway 10 as a specified value Y, and the specified value. A storage device 8 in which Y is stored in advance,
The specified value Y stored in the storage device 8 and the displacement detection device 6
When the displacement of the distance X between the lower surface of the car 1 detected by the displacement sensor 6a and the mounting bracket 2 is compared, and the comparison result is the displacement of the specified value Y <the distance X. Only the elevator control circuit 9 is provided with a comparator 7 that outputs a stop signal for elevator operation.

With the above configuration, the displacement of the distance X between the lower surface of the car 1 and the mounting bracket 2 due to the wiring cable 3 being caught by the equipment in the hoistway 10 is a specified value stored in advance in the ROM 8. When it becomes Y or more, the elevator control circuit 9
Since the stop signal is sent to the elevator and the elevator operation is stopped, the disconnection accident of the wiring cable 3 can be prevented.

[0012]

According to the present invention, the weight of the wiring cable applied to the mounting bracket when the car is located on the top floor and the mounting bracket when the car is located on the bottom floor are added. Even if the elevator has a large difference from the weight of the wiring cable, the elevator operation does not stop during normal traveling of the elevator, and when the wiring cable gets caught in the hoistway, make sure to stop the elevator operation. It is possible to prevent disconnection of the wiring cable.

[Brief description of drawings]

FIG. 1 is an overall view of an elevator showing an embodiment of an abnormality detection device for an elevator wiring cable according to the present invention.

FIG. 2 is an enlarged view of a main part of FIG.

FIG. 3 is an explanatory diagram showing a relationship between a displacement detection device and an elevator control circuit.

[Explanation of symbols]

 1 Car 2 Mounting bracket 3 Wiring cable 4 Connection box 5 Elastic body 6 Displacement detection device 6a Displacement sensor 7 Comparator 8 ROM 9 Elevator control circuit 10 Control circuit

Claims (2)

[Claims] 1. A car that moves up and down in a hoistway, a fitting provided on the lower surface of the car through an elastic body, one end of the fitting, and the other end of the fitting in the hoistway. And a wiring cable each of which is attached to one of the mounting bracket or the bottom of the car,
Further, the present invention is characterized in that a displacement detection device for detecting a displacement of a distance between the lower surface of the car and the mounting metal fitting is provided, and the elevator operation is stopped only when the displacement of the distance exceeds a specified value. Anomaly detection device for wiring cables for elevators. 2. The abnormality of an elevator wiring cable according to claim 1, wherein the specified value is set to a value exceeding a displacement of the distance when the car is located on the uppermost floor of the hoistway. Detection device.