JPS6023074B2 - Man conveyor operation control device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an operation control device for a man conveyor, and more particularly to an operation control device suitable for reducing the frequency of adjustment and maintenance of an electromagnetic brake of a man core such as an escalator.

FIG. 1 is an explanatory diagram of the overall configuration of an automatic operation type escalator, and FIG. 2 is a circuit diagram of a conventional escalator control circuit.

In FIG. 1, there is a river control device, 2 is a step, 3 is a handrail, and 4 is a passenger detection device provided at the lower entrance for detecting the boarding of a passenger. Regarding the case where the ascending operation is performed automatically, when the detection device 4 detects that a passenger gets on the escalator, the control circuit 1 starts operating the escalator, the steps 2 and the handrail 3 run in synchronization,
If there are no passengers after that, the vehicle will automatically stop operating. Next, the operation of the control circuit of the control device will be explained using FIG.

When the passenger detection device 4 detects the boarding of a passenger using a phototube or the like, the contact 4a is closed, the time relay 5 is energized, and is deactivated after a certain period of time has elapsed. The detection device 4 is configured to instantaneously close the contacts 4a, 4a2 each time a passenger is detected, regardless of the operation of the escalator. Therefore, when a passenger gets on board, the time relay 5 is energized by the closing of the contact 4a, and the ascending relay 11x is energized by the closing of the contact 4a2. Rising relay 11x
When energized, the contact 11Xa closes and the rising contactor 1
1 is energized, the contact 11a of the main circuit 21 is closed and closed, power is supplied to the motor 22 and the electromagnetic brake 23, and the escalator outside operation is started. In this state, if no passenger boards the vehicle after that, the time relay 5 is demagnetized after a certain period of time has elapsed, so the contact 5a is opened (at this time, the contact 4a2 is open) and the vehicle rises. relay 11
× indicates demagnetization. As a result, the rising contactor 11 is demagnetized, the contact 11a of the main circuit 21 is disconnected, the motor 22 is stopped, and at the same time the electromagnetic brake 23 is activated, stopping the operation of the escalator. Reference numerals 24 to 26 are safety devices provided at each part of the escalator, and when any one of these devices is activated, the ascending relay 11x is demagnetized and the escalator is stopped.

Further, reference numeral 27 denotes a maintenance operation switch, and only while this switch is turned on, the ascending relay 1X or the descending relay 12X is energized and the escalator can be operated.
28 is a rectifier for the electromagnetic brake 23, 29 is a resistor, 12Xa is a contact that closes when the descending relay 12X is excited, 12 is a descending contactor, 12a is a descending contactor turtle 2
It is a contact that closes when it is excited.

However, in the control circuit configured as shown in FIG. 2, the electromagnetic brake 23
Since the electromagnetic brake 2 is configured to operate the brakes by deenergizing, if automatic operation and pausing may occur as frequently as 200 to 300 times per day depending on the usage conditions, the electromagnetic brake 2
The lining (not shown) of No. 3 wears out quickly, and maintenance such as adjusting the electromagnetic brake 23 or replacing the lining must be performed frequently, which requires a lot of effort.

The present invention has been made in view of the above, and its purpose is to provide an operation control device for a passenger conveyor that can reduce the frequency of adjustment and maintenance of the electromagnetic brake of an automatically operated passenger conveyor. be.

A feature of the present invention is that when the passenger conveyor is stopped after operating for a predetermined period of time due to the operation of a passenger detection device that detects the boarding of a passenger, the electromagnetic brake is kept energized and kept in a brake released state until at least a predetermined period of time has elapsed. When the safety device operates to stop the passenger conveyor, the electromagnetic brake described above is provided with a means for deenergizing the electromagnetic brake at the same time as supplying or disconnecting power to the motor to operate the brake.

The present invention will be explained in detail below using the embodiments shown in FIGS. 3 and 4. FIG. 3 is a circuit diagram showing an embodiment of the operation control device for a passenger conveyor according to the present invention, illustrating the case of an escalator, and the same parts as in FIG.

In FIG. 2, the power for the electromagnetic brake 23 is taken from the power supply side via the rising contactor 11a and the falling contactor 12a, and when the safety devices 24 to 26 are not operating, the reset button is pressed. A relay 50 that is energized when 30 is pressed is provided, and a contact 5 that closes when the relay 50 is energized.
Among the contacts 0a and 50a3, the contact 50a is connected in series with the safety devices 24 to 26, not shown.
The excitation of the relay 50 is maintained by the closing of , and the contact 50a is connected as shown in the figure, and when any of the safety devices 24 to 26 is operated and the relay 50 is demagnetized, the contact 50a2 closes and rises relay 1
1x or descending relay 12x, etc. are demagnetized. Further, the contact 50a3 is connected in series between the rectifier 28 and the electromagnetic brake 23, and when the relay 50 is demagnetized, the electromagnetic brake 23 is deenergized by the opening of the contact 50a3, and "braking force is generated." According to the embodiment shown in FIG. 3, when the reset plow 30 is pressed after the escalator is powered on, the relay 50 is energized.
The electromagnetic brake 23 is energized by the closing of the contact 50a3,
The brake is released.

Further, the contact 50a. , 50a2 are also opened, and the contact 50
The excitation of the relay 50 is self-maintained by the closed circuit of a. When the passenger detection device 4 detects a passenger and operates in this state, as mentioned above, the opening of the saddle point 4a2 excites the ascending relay liX, and the closing of the contact 4a causes the time relay 5 to be energized. The excitation of the ascending relay 11x is maintained by the closing of the contact 5a, and the contact 11a is closed by the excitation of the ascending contactor 11, and the escalator is operated in an ascending manner. Thereafter, after a certain period of time has elapsed, the time relay 5 becomes a top magnet, the rising relay 11x becomes de-energized, the rising contactor 13 becomes de-energized, and the contact 11a is connected to the motor 22.
The power supply to the relay 50 is briefly cut off, but at this time, the relay 50 remains energized, so the contact 50a3 is closed.
The electromagnetic brake 23 remains energized. Therefore, the escalator automatically stops if there are no passengers even after the set time for automatic operation has elapsed. On the other hand, if any of the safety devices 24 to 26 operates during automatic operation,
Since the self-holding of the relay 50 is released and the relay 50 becomes demagnetized, the ascending relay 11x becomes demagnetized and the contact 11
a is opened, and the power supply to the motor 22 is briefly cut off, and at the same time, the electromagnetic brake 23 is opened due to the contact 50a3 being opened.
is deenergized, the electromagnetic brake 23 is activated, and the escalator comes to an emergency stop. That is, when the automatic operation is stopped and no passenger is on the escalator, the electromagnetic brake 23 remains energized and the brake is released, and when the safety device is activated and the automatic operation is stopped, power is not supplied to the motor 22 as before. At the same time, the electromagnetic brake 23 is deenergized and performs a braking operation.

Therefore, the number of operations of the electromagnetic brake 23 during automatic operation suspension, which is 200 to 300 times/day, can be reduced to zero, the amount of wear on the lining of the electromagnetic brake 23 can be significantly reduced, and the adjustment of the electromagnetic brake 23 can be reduced to zero. , the frequency of maintenance can be reduced. FIG. 4 is a circuit diagram corresponding to FIG. 3 showing another embodiment of the present invention, and the same parts as in FIG. 3 are designated by the same reference numerals.

The difference between FIG. 4 and FIG. 3 is the series circuit of contact 5b, which opens when timed relay 5 is energized, and timed relay T, the contact Tb, which opens when timed relay T is energized, and the rising contactor 11. A parallel circuit with a contact 11a2 that closes when the is energized, a contact 12a2 that closes when the descending contactor 12 is energized, and a contact 50a4 that closes when the relay 50 is energized.
A series circuit with relay B is provided as shown, and contact 50a3 in FIG. 3 is replaced with a contact 50a3 that closes when relay B is energized. In the case of FIG. 4, when the time relay 5 is energized and after a certain period of time has elapsed and the time relay 5 is deenergized, the contact 5b is closed and the time relay T is energized.

In addition, in relay B, when the safety devices 24 to 26 are normal, the relay 50 is energized, and the contact 50a4 is closed, the rising contactor 11 or the falling contactor 12 is energized, and the contact 11a2 is energized. Alternatively, it is energized when the contact 12a2 is closed, or when the time relay T is demagnetized and the connection Th is closed. When relay B is energized, contact Ba is closed and electromagnetic brake 23 is activated.
is energized and the brake is released. According to FIG. 4, if no passenger gets on board when the escalator is in the ascending operation state, the time relay 5 becomes demagnetized after a certain period of time and the power supply to the motor 22 is immediately cut off. It is similar to

However, in this case, even if the time relay T is energized by the closing of the contact 5b, the contact Tb continues to be closed until a certain period of time has elapsed, so the relay B remains energized and the contact 2a is closed. However, after a certain period of time has elapsed, the time relay T is turned on, the contact Tb is opened, and the relay B is demagnetized, so the contact side becomes open, and the electromagnetic brake 23 is deenergized to perform a braking operation. . In addition,
If any of the safety devices 24 to 26 is activated during operation, the self-holding of the relay 50 is released, the relay 50 is demagnetized, the contact 50a4 becomes a barrier, and the relay B is disconnected from the top regardless of the time relay T. Since it is magnetic, it operates in the same way as the case shown in Figure 3. Note that the time limit of the time limit relay T is set to be slightly shorter than the time required for the escalator to supply power to the motor 22 and to come to a natural stop. Therefore, the application time of the brake can be shortened and wear of the lining can be minimized. According to the embodiment shown in FIG. 4, wear of the lining can be minimized, and even if a passenger accidentally gets on the escalator from the exit when the escalator is in the standby state, the brake is still applied. Problems such as movement can be prevented.

As described above, according to the present invention, it is possible to reduce the frequency of adjustment and maintenance of the electromagnetic brake of an automatically operated passenger conveyor.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the overall configuration of an automatic operation type escalator, Fig. 2 is a circuit diagram of a conventional escalator operation control device, and Fig. 3 is a circuit diagram showing an embodiment of a control circuit for a passenger conveyor according to the present invention. , FIG. 4 is a third diagram showing another embodiment of the present invention.
2 is a circuit diagram corresponding to the figure. 4...Passenger detection device, 5...Timed relay, 11...Rising contactor, 12...Descent contactor, Tortoise ×...Rising relay. Tortoise 2X... Descending relay "22..." Mouse, 23... Electromagnetic brake "24-26...
... Safety device, 38 ... Reset nail, 50 ...
...Relay LT...Timed relay, B...Relay, 50a3, Ball...Contact. Multi-box 2-box ticket 3-lower 4-box

Claims (1)

[Scope of Claims] 1. A passenger conveyor configured to operate by supplying power to a motor and an electromagnetic brake when a passenger is detected by a passenger detection device, and to stop the operation when an abnormality is detected by a safety device. A device that cuts off the power supply to the motor after the passenger conveyor has been operated for a predetermined time by the operation of a detection device, and a device that continues to supply power to the electromagnetic brake even after the power supply to the motor is stopped or cut off, and maintains a brake release state. An operation control device for a passenger conveyor, comprising: a device for holding the motor; and a device for causing the motor to brake by simultaneously cutting off power supply to the electromagnetic brake by operation of the safety device. 2. In a passenger conveyor that is configured to operate by supplying power to a motor and an electromagnetic brake when a passenger is detected by a passenger detection device, and to stop the operation when an abnormality is detected by a safety device, the operation of the passenger conveyor is a device for cutting off the power supply to the motor after operating the passenger conveyor for a predetermined time; a device for maintaining the brake release state by continuing the power supply to the electromagnetic brake even after the power supply to the motor is stopped or stopped; A device that immediately cuts off the power supply to the electromagnetic brake after a predetermined time period has elapsed after the power supply to the motor is stopped, and a device that simultaneously cuts off the power supply to the motor and the electromagnetic brake by operating the safety device to operate the brake. An operation control device for a passenger conveyor, characterized by comprising: