JPS587597B2 - Man conveyor stop control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for controlling the stop of a passenger conveyor such as an escalator or a moving walkway.

When the power supply that drives the passenger conveyor fails, or when a no-fuse breaker connected to the power source operates, an electromagnetic brake acts on the passenger conveyor to stop it.

Conventionally, no consideration has been generally given to stopping the passenger conveyor when power is no longer supplied from the motive power source as described above.

Therefore, the stop is an uncontrolled sudden stop like a general stop.

This sudden stop is necessary when a safety device is activated due to an accident involving a passenger, or when an emergency stop button is manually operated to prevent an accident.

However, in the case of a stoppage due to a power outage, etc., there is no need to do so because the stoppage is unrelated to an accident involving passengers.

In fact, sudden stops can even lead to secondary disasters such as passengers falling over.

The purpose of this invention is to improve the above-mentioned problems, and an object of the present invention is to provide a stop control device for a passenger conveyor that prevents the passenger conveyor from suddenly stopping in the event of a power outage, etc. to ensure the safety of passengers. do.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In Figure 1, R and S are AC power sources for power, 1 is an electric switching relay, 1a is its normally open contact, 1b to 1d are normally closed contacts, 2 is a stop button, 3 is a key switch for operation, 4 1 is an electromagnetic contactor for driving, 4a to 4c are normally open contacts thereof, and 5 is a coil of an electromagnetic brake (not shown), which releases a motor for driving a passenger conveyor (not shown) when energized.

When the coil 5 is deenergized, the electric motor is restrained by the force of the spring.

Reference numeral 6 denotes a time-limited return type time relay that operates immediately when it is energized and returns after a certain period of time when it is de-energized; 6a is its normally open time contact; and 6b is a time-limited relay that opens immediately when the time relay 6 is energized. 7 is a normally closed instantaneous contact that closes immediately when it is deenergized, 7 is a rectifier 8 is a brake coil protection resistor, 9 is a brake power supply adjustment resistor, 10 is a brake current reduction relay, 10a, 1
0b is its normally open contact, 11 is a rectifier, and L1 and L2 are AC power sources for lighting.

Next, the operation of this embodiment will be explained.

Now, when power supplies R and S are turned on, power supply switching relay 1
is energized, the contact 1a closes, and the contacts 1b to 1d open.

With this, the power supply to the brake coil 5 from the lighting power supplies L1 and L2 is cut off.

When the operation key switch 3 is closed, R-2-3-4-
The operating electromagnetic contactor 4 is energized by the circuit 1a-S,
It is self-retained by closing the contact 4a.

In addition, since contacts 4b and 4c are also closed, R-2-7-
The circuit of 4 b-5-4 c-7-8 energizes the brake coil 5, releases the electric motor, and starts the man conveyor.

At the same time, time relay 6 is energized, contacts 6a are closed, and contacts 6b are opened.

In this state, the electric motor rotates and the man conveyor is operated.

During operation of the passenger conveyor, there will be a power outage to the power supplies R and S.
Alternatively, if power is no longer supplied due to operation of a no-fuse breaker or the like, no voltage is applied to the motor.

Power switching relay 1 is deenergized and contacts 1b to 1d are closed.

Further, the operating electromagnetic contactor 4 is also deenergized, and the contacts 4b,
4c is open.

At the same time, time relay 6 is also deenergized, contact 6b is closed, but contact 6a is still closed.

Therefore, L1-11-6a-1d-6b-10-11
-L2- circuit causes the brake current reduction relay 10 to be energized by the lighting power supplies L1 and L2, and the contacts I Da,
1 0b is closed.

L1-11-9-1 0a-1 b-5-1 c-1
By the circuit of 0b-1 1 -L2, the brake coil 5
are connected to lighting power supplies L, , L2 via a resistor 9.

As a result, a weak current flows through the brake coil 5, and the electromagnetic brake is held in a half-open state, so that the electric motor is braked with a weaker brake torque than usual.

The passenger conveyor slowly decelerates and eventually stops.

Therefore, even if there are passengers on the passenger conveyor, there is little chance of the passenger falling over.

When a certain period of time has elapsed after the time relay 6 was deenergized, the time relay 6 returns to its original state and the contact 6a opens, and the brake current reduction relay 10 is deenergized and the contacts 10a and 10b open.

The current in the brake coil 5 is then cut off, the brake torque returns to its normal value, and the motor is restrained.

2 and 3 show the above-mentioned progress, and in the figures, 15 to 17 are curves according to the above embodiment, and 18 to 20 are curves of the conventional one.

Further, to is the time point when the power supplies R and S are out of power, t1 is the time point when the brake torque starts to act, and t2 is the time point when the brake flow reduction relay 10 is deenergized.

In Fig. 1, by adjusting the value of the resistor 9, it is possible to raise or lower the level of the brake torque t2 shown in Fig. 3, and by changing the torque t2, the deceleration of the passenger conveyor can be changed. .

If you set the time limit t2 to to of the time limit relay 6 to be longer than the time required for the passenger conveyor to stop, the brake torque will be t1 and the normal value after the passenger conveyor has completely stopped. To hold the man conveyor back.

As is clear from the above description, since it is simply constructed with only a small number of electric circuit parts, it is inexpensive and can be easily modified to an existing passenger conveyor.

Instead of the lighting power supplies L1 and L2 and the rectifier circuit 11, it is also possible to easily use an uninterruptible emergency power supply such as a storage battery.

In this case, power supplies R and S for power and power supplies L1 and L2 for lighting
Needless to say, in any case of power outage, the passenger conveyor can be brought to a slow stop.

As explained above, in this invention, when power is no longer supplied from the power source for power, the electromagnetic brake is connected to a separate power source and is energized weaker than usual to slowly stop the passenger conveyor, and then the electromagnetic brake is deenergized. This makes it possible to ensure the safety of passengers on the passenger conveyor when power is no longer supplied from the power source.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing an embodiment of a stop control device for a passenger conveyor according to the present invention, FIG. 2 is a brake coil current curve diagram according to FIG. 1, FIG. 3 is a brake torque curve diagram, and FIG. It is also a man conveyor speed curve diagram. R, S...AC power supply for power, L1, L2...AC power supply for lighting, 1...Power switching relay, 4...Magnetic contactor for operation, 5...Electromagnetic brake coil, 6...Timed return type timer Relay, 9...brake current adjustment resistor, 10...brake current reduction relay.

Claims (1)

[Scope of Claims] 1. A power source for power, a separate power source provided separately from any power source for power, a motor for driving a passenger conveyor that is driven by the power source for power, and when energized, the motor is released and de-energized. an electromagnetic brake that restrains the electric motor when the electric motor is activated; a switching circuit that normally connects the electromagnetic brake to the motive power source and connects the electromagnetic brake to the separate power source when power is no longer supplied from the motive power source; Stopping of a passenger conveyor, comprising a current reduction circuit that energizes the electromagnetic brake connected to a separate power source weaker than when it is connected to the power source, and deenergizes the electromagnetic brake after the electric motor has stopped. Control device. 2. A stop control device for a passenger conveyor according to claim 1, which uses a lighting power source as a separate power source. 3. The passenger conveyor stop control device according to claim 1, which uses an emergency power source as a separate power source.