JPH03162378A - Safety device for inspection of elevator - Google Patents

Abstract

PURPOSE:To prevent trouble during the inspection work by sounding an alarm in a synthesized voice when a balance weight approaches within a prescribed distance in the inspection on a traveling cage. CONSTITUTION:When an operation switch for inspection operation is turned ON, inspection work is carried out in the upper part of the cage 2 of a traveling elevator and a balance weight 3 suspended at one edge of a main rope 4 approaches the cage 2 within a predetermined distance, a voice synthesizing device 11 operates and an alarm is sounded to an operator. Accordingly, the operator is precautioned against the approach of the balance weight 3 correctly without making any judgement mistake, and the safety of work can be secured.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a safety device for inspecting elevators. [Prior Art] Conventionally, when inspecting equipment installed above the car and in the hoistway, a worker climbed onto the top of the corner of the elevator and carried out the inspection while moving the car up and down. When the car is raised or lowered, there is a risk of being pulled into or caught in the counterweight that moves up and down in the opposite direction to the direction in which the car corner is raised or lowered.

Therefore, as shown in Japanese Utility Model Application No. 58-67862, for example, an alarm device is installed on the top of the car, and when the distance between the counterweight and the car becomes within a certain distance, the alarm device is activated. A device that makes a sound has been proposed.

[Problem to be solved by the invention]

However, since the alarm device simply sounds a buzzer, it is necessary to determine what kind of alarm it is.
Making such a judgment during inspection work is troublesome, and the warning that the counterweight is approaching may be mistaken for another warning or may be missed, making it difficult to accurately notify that the counterweight is approaching. I couldn't.

An object of the present invention is to provide an elevator inspection safety device that can accurately notify the approach of a counterweight when an inspection is performed while moving a car. [Means for Solving the Problems] The above purpose is to wrap a main rope with a car at one end and a counterweight at the other end around a sheave on a hoisting rock, and drive the sheave rotationally by the hoisting rock to transport the car to the car. , In an elevator inspection safety device that moves counterweights in opposite directions, there is a switch that is turned on during elevator inspection, and when this switch is turned on, the counterweight approaches the car and the distance This is achieved by installing an audio synchronization device that operates when the balance weight falls within a predetermined value and broadcasts that the counterweight is approaching. [Operation] Because of the above structure, when you stand on the top of the car, turn on the inspection switch, and move the car while inspecting it, the counterweight approaches the car and the distance is When the value falls within a predetermined value, the audio synchronization device operates and broadcasts a synchronization sound that the counterweight is approaching from above or below. It is possible to know that a counterweight is approaching without any judgment, and accidents caused by this can be prevented. [Example] Hereinafter, one embodiment of the present invention will be explained with reference to Figs. FIG. 2 is an electrical circuit diagram showing one embodiment of the notification circuit.

In FIG. 1, a car 2 and a counterweight 3 are arranged in a hoistway so that they can be raised and lowered along a guide rail (not shown).
are suspended by a main rope 4 and moved (elevated and lowered) in opposite directions by a hoist 6 installed in a machine room 5.

On the wall of hoistway 1, there is a position detection switch 7A and a passenger door 2.
includes a pusher 7B that presses the position detection switch 7A;
7C, and the position of the position detection switch 7A is selected so as to detect when the counterweight 3 approaches the car 2 within a predetermined distance.
Specifically, the distance M1 from the upper end of the car 2 to the upper end of the counterweight 3 is the length of the counterweight 3. The length shall be the sum of the worker's height and allowance.

Next, an example of the notification circuit will be explained with reference to FIG. Between the control power bus lines P and N, there is an operation switch 8 for inspection operation, and a relay contact 9a. The normally open contact 7Aa of the position detection switch 7A and the voice synthesizer operating relay 10 are connected in series. An audio combining device 11 is connected to the audio combining device operation relay 10, and when the contact 10a of the relay 10 is closed, the audio combining device 11 is configured to start broadcasting preset contents. has been done. Further, a warning light 12 is connected in series with the contact 10a. The warning light 12 is installed on top of the car 2, and the warning light 111 is installed on top of the car 2.
Moreover, the speech synthesizer 11 is installed for guiding the arrival floor, guiding the opening/closing operation of the door, etc.

Next, the operation during inspection operation will be explained.

As shown in Figure 1, we will discuss the case where the power and 1 are increased. Turn on (close) the inspection operation switch 8 to enable inspection operation, get on top of the car 2, and inspect the equipment in the hoistway while raising the car 2.
When the counterweight 3 approaches a predetermined distance above the car while the car 2 is rising, the switch 7A is pressed by the pusher 7B, its constant contact 7Aa closes, and the switch 8 and contact 9a are already closed. Therefore, relay 10 is energized. The energization of the relay 10 closes the constant contact 10a, which activates the voice synthesizer 11 and warning light 12, and the voice synthesizer 1 issues a message saying, ``A counterweight is approaching from above. Please be careful. ”
In conjunction with this, an audio warning message is repeatedly played, and the warning light 12 lights up (blinks). This allows the operator who is performing inspection work while riding on the car 2 to know that the counterweight 3 is approaching.

When inspection is performed in descending operation, the switch 7A is pressed by the suppressor 7C, and the operation is similar to that described above, thereby notifying the inspection operator that the counterweight 3 is approaching from below.

In the above embodiment, the warning light 12 may be removed and only the voice synthesizer 11 may be provided. [Effects of the Invention] As described above, according to the present invention, when the inspection operation switch is turned on and the operator is riding on the upper part of the car and inspecting it while raising and lowering the car, the counterweight approaches the car. When the distance falls within a predetermined value, the voice synthesizer operates and broadcasts, using directly synthesized voice, that the counterweight is approaching from above or below.
Inspection workers can know that a counterweight is approaching without having to make any judgments, and there is no chance that they will misinterpret it as another alarm, and they will be able to accurately notify them of the approach of a counterweight. Accidents can be prevented.

[Brief explanation of the drawing]

Fig. 2 is a sectional view of a hoistway showing an embodiment of the elevator inspection safety device of the present invention, and Fig. 2 is an electric circuit diagram showing an embodiment of the notification circuit. 2... Riding lever, 3... Counterweight, 7A... Position detection switch, 8...
・Operation switch for inspection operation, 10... Relay for operation of synthesized voice device, 11... Voice synthesizer, 12... Warning light.

Claims (1)

[Claims] (1) A main rope with a car suspended at one end and a counterweight suspended at the other end is wound around a sheave of a hoist, and the sheave is rotated by the hoist to move the car and counterweight in opposite directions. In the elevator inspection safety device, the switch is turned on when the elevator is inspected, and when this switch is turned on, the counterweight approaches the car and the distance is within a predetermined value. 1. A safety device for inspecting an elevator, characterized in that it is equipped with a voice synthesizer that operates when the balance weight is reached and broadcasts that a counterweight is approaching.