JPS58148172A - Brake gear for passenger conveyor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a braking system for a passenger conveyor that has a modified brake circuit for escalators, electric passageways, etc.
-Generally, the operation circuit of a braking device for a passenger conveyor is as shown in Fig. 1, where the stain sources R, 8, and T are branched from the circuit of the electric motor 1, and converted into direct current [by the flow device 4].
An application is applied to the DC electromagnetic brake 2. The feature of this method is that the brake power source is connected to the electromagnetic contactor 12 for the driving electric motor.
Since it is branched from the load side, when the electromagnetic contactor 12 opens, the brake circuit actually opens.It is highly reliable and is most commonly used for lifting loads of passenger conveyors.

In Figure 1, R, S, and T are AC power supplies, PPB is a circuit breaker, 1 is an AC motor, 2 is a DC electromagnetic brake, TR is a power transformer for the control circuit, 8-manufacturer knife switch is used, and 3 is a control circuit. This block shows a rectifier for the lj brake circuit, and a surge amplifier for the rectifier 4 for the 5 and 6Fi brake circuits.

B8R is a series resistor that adjusts the voltage applied to the DC electromagnetic brake 2, and BDR is a discharge resistor that is inserted in parallel with the brake 2 to suppress surge voltage. 11 towns - 1
1 is the main contact of the forward rotation electromagnetic contactor 11, il, 14
is an auxiliary contact of the TA contactor 11 for forward rotation, and is inserted into the direct QiK of the rectifier 4.

12m, ~12m, This is the contact point of the electric am contactor 12 for Fi reversal. .

The operation of this circuit will be explained. When a forward rotation command is issued now, the magnetic contactor 11 for forward rotation is turned on and the main contact 11*t-1
tam and the auxiliary contact 11a4 are closed, and the AC motor 1
A voltage is applied to the DC electromagnetic brake 2, and the first passenger conveyor starts operating. When a stop command is given, touch the electric aim! il
l main contacts 11M, ~111. Then, the auxiliary contact 11- is opened, and the DC electromagnetic brake 2 is immediately applied to stop the passenger conveyor. In case of reversal - same as above.

This method has the advantage of being highly reliable because it directly interrupts the motor and play using an electromagnetic contactor, but it has the disadvantage that the voltage of the brake circuit changes each time depending on the power supply specifications of the customer. When the voltage of the brake circuit changes depending on the power supply specifications of the consumer, the withstand voltage specifications of the rectifier 4 and the series resistor 88 for the brake change.
The specifications of R will change. Therefore, the number of series resistors 88B,
The set value of the resistor and the box with the resistor plate change, and it must be designed and manufactured according to the power supply specifications.

The operating voltage of the DC electromagnetic brake 2 is selected to be considerably lower than the general DC output voltage.
The power loss in this part is also large. (9) Since the power supply voltage is applied to the rectifier 4 at tt, a voltage pumper 5 is required to suppress the voltage.

SUMMARY OF THE INVENTION An object of the present invention is to provide a braking device for each conveyor having a braking circuit that is not affected by the power supply voltage specifications of a consumer.

A feature of the present invention is that the brake circuit is constructed from a control circuit with a constant voltage.

An embodiment of the present invention is shown in FIG. 2 below. TR is a power transformer for a control circuit, and is a low voltage AC100V class.

In the brake circuit according to the embodiment of the present invention, 8 is a knife switch, and 3 is a control circuit block.
branch to the load side, and apply an AC voltage to the current flow device 4.

5 is a surge interrupter on the AC side of the 4 rectifier, which receives the dage voltage tT & a 11J14 from the control circuit 3.
mlla, Fi is an auxiliary contact of the forward rotation electromagnetic contact 611, and is inserted into both the positive and negative poles on the output side of the rectifier 4. Ton is adjusted by the B8RFi series resistor so that a specified voltage is applied to the brake 2. BDR is a discharge resistor and suppresses the surge voltage generated by the brake 2. Now, when the forward rotation magnetic contactor 11 is turned on, the main contact 1
Even if 14 to 11a are closed, the AC motor 1 starts, and at the same time, the auxiliary contacts 114 to 11m are closed and the brake 2 is released. When a stop command is issued, the main contacts 1111 to 11m, auxiliary contacts 1114, 111, and 1114 of the forward rotation electromagnetic contactor 11 are activated.
The embodiment of the present invention uses a brake circuit rather than a control circuit with a constant voltage as described above, so there is no need to design and manufacture it each time according to the power supply specifications of the customer, and it can be standardized. I can do it.

In the embodiment of the present invention, the voltage applied to the brake is low, such as vhc100V, so the series resistor only requires a small amount of voltage adjustment, and the number of resistors required is reduced.
1Ii improves the efficiency of the passenger conveyor due to the reduced power consumption of the small series resistor. The fact that the ceramic and resistor box can be made smaller means that the space in the machine room is larger and the amount of heat generated by the resistor is reduced, which lowers the room temperature in the machine room and provides light to other equipment. Furthermore, since the voltage applied to the brake circuit can be lowered, the surge voltage generated by the brake coil is lowered, and the am-side stage absorber can be removed.

According to the present invention, as explained above, the design can be made -S@ regardless of the power supply voltage specifications, so that the effect of simplification is large and the cost can be reduced, which is economical.

Similarly, in the case of the present invention, although there is a concern that reliability may be lowered, since the positive and negative at of the brake circuit are cut off, so-called double cut, reliability can be ensured, and the operation frequency is also high.

[Brief explanation of drawings]

FIG. 1 is a circuit diagram showing a conventional braking device for a passenger conveyor, and FIG. 2 is a circuit diagram showing an embodiment of a passenger conveyor control device according to the present invention.

Claims (1)

[Claims] 1. A vehicle comprising: an electric drive circuit for a passenger conveyor; and a brake circuit for braking the electric motor. 1. A braking device for a passenger conveyor, characterized in that the power source for the brake circuit is taken from the load side of a control power transformer, and the direct current KIII is applied to the brake circuit.