JPH0229593B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a passenger conveyor device, and particularly to a power-saving passenger conveyor device.

Generally speaking, high-lift escalators installed at subway stations and the like have few passengers and are often operated under almost no load conditions. When a train arrives and all the passengers board the train all at once, there is a case where the train becomes overloaded, which causes the problem that the electric power is not being used effectively. Therefore, the condition of the customer,
It is also desirable to be able to operate the man conveyor according to the load condition on the man conveyor.

The present invention has been made in view of the above-mentioned points, and its purpose is to provide a so-called power-saving type passenger conveyor device that can effectively utilize electric power.

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a schematic diagram of the main parts of an embodiment of a passenger conveyor apparatus according to the present invention. In the figure, 1 is a passenger conveyor, 1a is its step, and 2
1 is a first drive unit that operates the passenger conveyor 1, 3 is a similar second drive unit, and 4 is a passenger detection device that detects passengers who have arrived at the boarding/disembarkation area. 2 is a drive unit circuit diagram of the passenger conveyor apparatus shown in FIG. 1, and FIG. 3 is a control circuit diagram of the passenger conveyor apparatus shown in FIG. 1.

In FIGS. 2 and 3, 4a is a passenger detection contact that is closed when the passenger detection device 4 detects a passenger using the passenger conveyor 1, and 5 is the first contact point.
A first motor 6 drives the drive unit 2, and a second motor 6 drives the second drive unit 3.These motors 5 and 6 are connected to a three-phase AC power source through contactor contacts, which will be described later. It is connected. 7 is the first drive unit 2
The electromagnetic brake 8 is an electromagnetic brake of the second drive unit 3, and these electromagnetic brakes 7 and 8 are excited and opened at the same time as the electric power is supplied to the corresponding motor 5 or 6. It demagnetizes and brakes at the same time as it shuts off.
9 is a contactor for upward operation of the passenger conveyor 1;
Contactor contacts 9a, 9b, self-holding contacts 9c, normally closed contacts 9d, and normally closed contacts 9e, connected to any two phases connecting the motors 5 and 6 and the three-phase AC power supply.
It is equipped with 9f. 10 is a contactor for descending operation of the passenger conveyor 1, and the contactor contact 1 is connected to any two phases connecting the motors 5 and 6 and the three-phase AC power supply.
0a, 10b, a self-holding contact 10c, and a normally closed contact 10d. Reference numeral 11 denotes a contactor for controlling the second motor 6, and includes contactor contacts 11a and 11b connected to the power supply line of the motor 6.
12 is a stop switch for the passenger conveyor 1, 13
is an upward start switch for the passenger conveyor 1, 14 is a downward start switch for the passenger conveyor 1, 15 and 16 are current transformers that take out the load current during operation of the passenger conveyor,
17 is a power converter that converts the load current detected by the current transformers 15 and 16 into electric power; 18 is the power converter 1;
This is a voltage relay that is energized by an output voltage equal to or higher than the set value of No. 7, and includes a normally open contact 18a. 1
9 is a time limit setting timer for automatic operation of the passenger conveyor; 19a is its normally open contact; 20 is an absorption timer for preventing the second motor 6 from starting when the first motor 5 is started; A normally open contact 20a is provided. Further, 21a and 21b are normally closed contacts of a relay that is energized when the passenger conveyor 1 is automatically operated, and each is a self-holding contact 9c of the contactor 9 for upward operation or a self-holding contact of the contactor 10 for downward operation. It is connected in series to the contact 11c.

Next, the operation of the passenger conveyor of the present invention constructed as described above will be explained.

When the passenger conveyor (escalator) is in power-saving operation mode, that is, during automatic operation, an automatic operation relay (not shown) is energized, so that its normally closed contact 21 is energized.
a and 21b are opened, and furthermore, the up operation switch 13 and the down operation switch 14 are opened, and the passenger conveyor is stopped.

In this state, when the passenger detection device 4 installed in front of the entrance of the passenger conveyor 1 detects a passenger using the passenger conveyor 1, the detection switch 4a is turned on, and the (+)- switch 4 is turned on.
The time limit setting timer 19 for automatic operation is started by the closed circuit of the a-timer 19-(-). When the normally open contact 19a closes due to the start of the timer 19, the (+)-stop switch 12-
Contact 19a - Normally closed contact 10d - Contactor 9 - (-)
The contactor 9 for rising operation is energized by the closed circuit of , and its contactor contacts 9a, 9b and normally open contact 9
When contactor contacts 9a and 9b are closed, the normally closed contact 9d is closed, and the contactor contacts 9a and 9b are closed, three-phase AC power is supplied to the first motor 5, and the motor 5 is started. At this time, the first and second electromagnetic brakes 7 and 8 are also excited, and the brakes are released. Further, since the starting current when starting the motor 5 is considerably larger than the load current during normal operation, the voltage relay 18 is energized and its normally open contact 18a is closed, but the absorption timer 20 is Therefore, the second motor 6 is prevented from starting.

That is, when the upward operation contactor 9 is energized and its normally open contact 9f is closed, the absorption timer 20 is operated by a closed circuit of (+)-contact 9f-mimer 20 (-). This timer 2
0 is a delay-on type, so it will not turn on until a predetermined time period has elapsed. Therefore, if the time limit of the timer 20 is set to be longer than the starting time of the motor 5, even if the voltage relay 18 is energized by the starting current of the motor 5, the second motor control contactor 11 will not be energized. If this is not done and the starting of the motor 5 is completed, the starting current will no longer flow, the voltage relay 18 will be deenergized, and the second motor 6 will not be started. Therefore, the passenger conveyor 1 is driven only by the first motor 5, that is, by the first drive unit 2.

Here, if the number of passengers using the passenger conveyor 1 is sparse and there are no passengers for a predetermined period of time (to be described later), in other words, the time limit set by the timer 19 after the detection device 4 detects the passenger (the passenger does not board the passenger conveyor 1). When the time (sufficient time for the vehicle to be transported from the entrance to the exit) has elapsed, the timer 19 is turned off and its normally open contact 1 is turned off.
9a is opened, thereby deenergizing the contactor 9 for upward operation, its contactor contacts 9a and 9b are opened, and the first
The motor 5 stops and the passenger conveyor 1 also stops.

Furthermore, if the next passenger is detected by the detector 4 before the time limit setting timer 19 is timed off, the count value of the time limit setting timer 19 is reset and the time limit is counted from the beginning to maintain the on state. Then, the upward operation contactor 9 is continuously energized to continue the operation of the passenger conveyor 1.

Further, when a large number of passengers use the passenger conveyor 1, such as during a rush, when the first passenger is detected by the passenger detector 4 and the contactor 9 for upward operation is energized by closing the contact 4a, The first motor 5 is started in the same manner as in the above case, and the passenger conveyor 1 is driven by the first drive unit 2. As the number of passengers on the passenger conveyor 1 gradually increases, the load current increases and the input voltage from the current transformers 15 and 16 to the power converter 17 reaches the point P1 shown in FIG. and its output voltage exceeds V ₁ , the voltage relay 18
is turned on (see Figure 5), and its normally open contact 18a
is closed. At this time, since the contactor 9 for rising operation is energized and the absorption timer 20 is also delayed-on, when the normally open contact 18a of the voltage relay 18 is closed, the (+)-contact 18a-contact 9e - Contact 20a - Contactor 11 - The second motor control contactor 11 is energized by the (-) closed circuit, and the contactor contacts 11a and 11b are closed to energize the second motor 6. , launch this. Therefore, the passenger load caused by a large number of passengers getting on the passenger conveyor 1 is reduced by two motors, namely the first and
The second motors 5 and 6 are responsible for driving the passenger conveyor 1.

In addition, as the number of passengers decreases and the load current decreases, the input voltage of the power converter 17 decreases as shown in FIG.
When the voltage falls below the point P ₁ , the output voltage also falls below V ₁ , so the voltage relay 18 is deenergized (see Fig. 5), and its normally open contact 18a opens, thereby opening the second motor control contact. 11 is deenergized, its contactor contacts 11a and 11b are turned off, and the motor 6 is disconnected from the power source. When the time limit set by the time limit setting timer 19 has elapsed since the last user was detected by the detection device 4, the time limit setting timer 1
9 is deenergized, the contactor 9 for upward operation is also deenergized, and the first
motor is disconnected from the power supply and the motor conveyor 1
will stop.

Further, when the up start switch 13 or the down start switch 14 is turned on, the passenger conveyor 1 is continuously operated regardless of the time limit setting timer 19 for automatic operation. That is, when the rise start switch 13 is turned on, the rise operation contactor 9 is energized by the closed circuit of (+) - stop switch 12 - switch 13 - contact 10d - contactor 9 - (-), and at the same time By being self-held by the contact point 9c, the passenger conveyor 1 is allowed to operate normally continuously in the upward direction. Also, if the lowering start switch 14 is turned on, the (+)-stop switch 12-switch 14
- Contact 9d - Contactor 10 - The contactor 10 for descending operation is energized by the (-) closed circuit, and is self-retained by closing its contact 10c, and at the same time, the passenger conveyor 1 continues normally in the descending direction. Drive. Then, the second motor 6 is controlled by the voltage relay 18 and the contactor 11 in accordance with the load applied to the passenger conveyor 1, as in the automatic operation described above.

According to such a configuration, since the load is generally light during automatic operation, it is possible to operate mostly with the second motor 5, and even if a large amount of load is temporarily applied, the second motor
Since the motor 6 is automatically started and operated,
There will be no overload. Furthermore, since the passenger load is detected using electric power, a signal directly corresponding to the load applied to the motor can be obtained, resulting in high detection accuracy. Note that if the voltage relay 18 is provided with a hysteresis characteristic for detection so that switching does not occur frequently, the control will be made smoother. Note that the control circuit means in this invention is not limited to that of the above embodiment.

As explained above, according to the present invention, when the passenger detection means detects a passenger during the automatic operation mode of the passenger conveyor, the automatic operation time limit setting means operates to start some of the plurality of drive units, and the passenger conveyor is activated. At the same time, the operation of the passenger conveyor is stopped after the set time period has elapsed, and each time a passenger is detected within a predetermined time period, the time limit setting means is reset to allow the passenger conveyor to continue operating. When the means detects a passenger load that exceeds the set value, the other drive units are also started to run the passenger conveyor, so the passenger conveyor with multiple drive units is operated continuously in a state with almost no load. This eliminates the problem of overloading, and enables operation control by thinning out the drive units according to the passenger load.This has the effect of realizing an energy-saving passenger conveyor system that can effectively utilize electricity. be.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of the essential parts of an example of a passenger conveyor device according to the present invention, and FIG. 2 is a circuit diagram of a drive unit of the passenger conveyor device according to the present invention.
FIG. 3 is a control circuit diagram of the passenger conveyor apparatus according to the present invention, FIG. 4 is an input/output characteristic diagram of a power converter, and FIG. 5 is a characteristic diagram of a voltage relay. 1...Man conveyor, 2...First drive unit, 3...Second drive unit, 4...
Passenger detection device, 4a... passenger detection contact, 5... first motor, 6... second motor, 7... first electromagnetic brake, 8... second electromagnetic brake, 9...
... Contactor for upward operation, 10 ... Contactor for downward operation, 11 ... Control contactor, 12 ... Operation stop switch, 13 ... Up start switch, 14 ... Down start switch, 15, 16 ... Current transformer, 17...
... Power converter, 18 ... Voltage relay, 19 ... Time limit setting timer, 20 ... Absorption time limit timer. Note that the same parts in the figures are indicated by the same reference numerals.

Claims (1)

[Claims] 1. A means for switching and setting a passenger conveyor to an automatic operation mode during off-peak periods when there are few users of the passenger conveyor, a plurality of drive units that drive the passenger conveyor, and a means for switching the passenger conveyor to an automatic operation mode, which is arranged at a boarding and alighting place of the passenger conveyor, A passenger detection means detects a passenger getting on the vehicle; a load detection means detects a passenger load applied to the passenger conveyor; and when the passenger detection means detects a passenger during automatic operation mode, a start command is given to some of the plurality of drive units. automatic operation time limit setting means for causing the passenger conveyor to operate for a predetermined period of time, and resetting the passenger conveyor each time the passenger detection means detects a passenger within a predetermined time to continue operating the passenger conveyor; control means for starting other drive units and operating the passenger conveyor by all drive units when the load detection means detects a passenger load exceeding a set value due to an increase in the number of passengers when the passenger conveyor is being operated by the unit; A passenger conveyor device characterized by: