JP2000351545A - Elevator maintenance safety device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the safety of a maintenance and inspection work by providing a load detecting device capable of detecting the presence of a maintenance worker when the maintenance worker gets on a car, notifying another worker in a machine room of the presence by the detection signal, and making the elevator inoperable in the machine chamber. SOLUTION: In an elevator for raising and lowering a car 9 and a balance weight 3 through a rope 5 by a traction machine 4 set in a machine room 1, a load detecting device 8 is provided on the roof part of the car 9, and it detects that a maintenance worker A gets on the car 9 and transmits the detection signal to a control board 2 within the machine room 1. According to this, an alarm device within a car control BOX 7 and an alarm device 10 provided on the control board 2 of the machine room 1 are operated to notify a worker B within the machine room 1 of the presence of the worker A on the car. When a maintenance operation mode SW is OFF, a car load detecting device signal is turned ON and a machine room operation switch is turned OFF to make the elevator inoperable in the machine room 1.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a safety device for maintenance and inspection of an elevator.

[0002]

2. Description of the Related Art Conventionally, as described in Japanese Patent Application Laid-Open No. 4-164789, a car maintenance person and a machine room maintenance person communicate with each other through an intercom. However, if the intercom is interrupted, the machine room maintenance staff may not notice the presence of the car maintenance staff and operate the elevator at high speed, which may cause an unexpected accident.

[0003]

SUMMARY OF THE INVENTION In order to prevent such an accident from occurring, the present invention notifies a worker in a machine room of the presence of a worker when the worker gets on the car, Upper worker switches to maintenance operation mode by himself
An object of the present invention is to provide a maintenance and safety device for an elevator, by preventing the operator from forgetting to insert W and making the elevator operation impossible in a machine room as a backup mechanism.

[0004]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a method in which a maintenance worker gets on a car.
A load detecting device capable of detecting this is provided, so that another worker in the machine room is notified of the presence, and the elevator operation in the machine room is disabled. Further, the car operator himself / herself surely turns on the car maintenance operation SW and switches to the maintenance inspection work mode.

With such a system, it is possible to prevent a maintenance worker from forgetting to turn on a maintenance operation switch when a maintenance worker on a car gets on the car, and to prevent an unexpected accident due to an erroneous operation in a machine room by another worker. it can.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An elevator maintenance and safety device according to the present invention will be described below with reference to FIGS.

FIG. 1 is an overall configuration diagram, and FIG. 2 is a car control BO.
3 is a detailed view of the backup mechanism, and FIG. 4 is a flowchart.

FIG. 1 shows a car 9 connected by a rope 5 via a traction machine 4 installed in a machine room 1.
And the counterweight 3 are shown. Reference numeral 8 denotes a load detection device that detects when a maintenance worker gets on the car,
The signal is transmitted to the control panel 2 in the machine room 1.

Now, suppose that a maintenance worker has stepped on the car with the car 9 stopped. Normally, when getting into the car, the maintenance worker himself puts the maintenance operation SW 13 in the car control box 7 installed on the car and forgets to switch to the car maintenance operation mode. Suppose you are doing In general, it is assumed that two-person work is basically performed when working on a car, one working on the car and the other working in the machine room 1. Here, the car worker is A and the machine room worker is B. Suppose now that both the A and B maintenance workers do not have any communication means such as a transceiver. The worker B in the machine room 1 determines that there is nobody even though the worker A is working on the car, and moves the elevator to the machine room 1.
There is a danger that the elevator will be operated at a high speed and the elevator will be operated at high speed. Naturally, an unexpected accident will occur if the elevator is operated at high speed with the worker A on the car.

Therefore, the present invention provides a load detecting device 8 which detects when an operator A gets on a car, and at the same time, a notifying device 12 on the car and a machine room notifying device 10
Is activated, the worker A is warned that the maintenance operation SW 13 on the car is forgotten, and the worker B is notified of the recognition of the presence of the worker on the car. Further, as shown in FIG. 3 as a backup mechanism, when the maintenance operation mode switch is OFF while the maintenance person is on the car, the relay a (maintenance operation SW relay) is turned off. (Device signal) turns on. Further, thereby, the relay c (machine room operation permission signal) is turned on and the relay d (machine room operation switch) is turned off, thereby disabling the elevator operation in the machine room 1 and ensuring safety.

FIG. 4 is a flow chart showing the above-mentioned series of flows.

Normally, as shown by the dotted line, the maintenance and inspection switch is turned on before the maintenance person gets on the car, and the mode is switched to the on-car maintenance and inspection mode. In this flowchart, the maintenance person gets on the car without turning on the maintenance and inspection SW. Therefore, the on-car load detection device operates, and the on-car and machine room notification device operates to notify maintenance personnel. Therefore, when the maintenance staff turns on the maintenance operation SW, the car and the machine room notification device stop, and the normal car inspection work mode is set. On the other hand, unless the maintenance staff turns on the maintenance operation SW, the elevator operation from the machine room becomes impossible and accidents can be prevented beforehand.

[0013]

According to the present invention, there is an advantage that the maintenance worker can always perform the maintenance and inspection work on the car safely.

[Brief description of the drawings]

FIG. 1 is an overall system diagram showing one embodiment of a maintenance and inspection device of the present invention.

FIG. 2 is an enlarged view of a car control box.

FIG. 3 is a detailed view of a backup mechanism.

FIG. 4 is a flowchart.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Machine room, 2 ... Control panel, 3 ... Counterweight, 4 ... Traction machine, 5 ... Rope, 6 ... Elevator hoistway, 7
... Car control box, 8 ... Car load detection device, 9 ... Car, 10 ... Machine room alarm device, 11 ... Car alarm device (buzzer), 12 ... Car alarm device (indicator light), 13 ... Car Maintenance operation switch, 14 ... Machine room elevator operation switch, a
... Maintenance operation SW relay, b ... Car load detector signal relay, c ... Machine room operation permission signal relay, d ... Machine room operation SWON signal relay.

Claims (3)

[Claims] In an elevator capable of performing maintenance and inspection work by a worker getting into an upper part of a car ceiling, a load detecting device is provided on the car to detect the worker getting into the upper part of the ceiling. An elevator maintenance and safety device characterized in that a device for notifying another worker in a machine room of the presence of a worker on a car is provided in the machine room. 2. An elevator maintenance and safety device according to claim 1, wherein the car maintenance worker is notified at the same time to prevent forgetting to put on the car maintenance SW. 3. An elevator maintenance and safety device according to claim 1, wherein the elevator in the machine room cannot be operated when the alarm device is operated.