JPH04144898A - Control unit for escalator - Google Patents

Abstract

PURPOSE:To suppress the generation of a braking noise and reduce the abrasion of a brake shoe by gently stopping an escalator driving electric motor at the time of detecting no passenger, and operating a brake at the time of confirming the stop. CONSTITUTION:A gentle stop circuit 12 gives immediate stop instruction to a driving operation circuit 11 and immediately operates a brake 13 on the basis of the emergency stop signal of a safety circuit 8, and also gives the instruction to gently stop an induction electric motor 21 on the basis of a general stop signal as detecting no passenger by an entrance detector 20 to the driving operation circuit 11. When the gentle stop circuit 12 gives the gentle stop instruction to the driving operation circuit 11, a brake timer 22 as a confirming braking means is started to operate the brake 13 at the time possible to predict the sure stopping the escalator.

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) This invention provides a boarding gate detector for detecting passengers at the boarding gate of an escalator, and an output of the boarding gate detector. The present invention relates to an escalator control device that automatically operates and stops an escalator based on signals.

(Prior art) This type of control device starts operation when the entrance detector detects a passenger, and the entrance detector does not detect the passenger even after a preset time has elapsed. In case, the operation was stopped. An example of the content of this control is shown in a flowchart as shown in FIG.

In other words, step 1 to determine whether automatic operation or manual operation is required.
01), in the case of automatic operation, it is determined whether the current time is within a preset operating time (step 102). Then, if it is not within the set operating time, it is determined whether or not the entrance detector has detected a passenger (step 103), and if it has not detected a passenger, the brake is applied (step 104), and the system continues as it is. The escalator is stopped (step 105).

(Problems to be Solved by the Invention) This type of escalator that automatically operates according to the output of the entrance detector frequently starts and stops repeatedly. However, conventional escalator control devices
Braking was applied using the brake torque at maximum load regardless of the load condition. For this reason, there was a problem in that the brake noise echoed every time the vehicle stopped. Additionally, because the brakes are operated many times, the brake shoes are subject to more wear and tear than regular escalators that do not switch to automatic operation, necessitating frequent inspection and maintenance.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an escalator control device that can suppress the generation of brake noise and reduce wear on brake shoes.

[Structure of the invention]

(Means for Solving the Problems) This invention provides a boarding gate detector for detecting passengers at the boarding gate of an escalator, and operates and stops the escalator based on the output signal of the boarding detector. and in an escalator control device that operates a brake every time the escalator stops, a slow stop means that gently stops an escalator drive electric motor when the entrance detector does not detect a passenger; The present invention is characterized by comprising confirmation braking means for confirming that the escalator has stopped due to the operation of the means, and for operating the brake when the stoppage is confirmed.

(Function) In this invention, the escalator drive motor is gently stopped when no passengers are detected, and the brake is activated when the stop is confirmed.
There is no brake noise, and wear on the brake shoes is kept low.

(Embodiment) FIG. 1 is a block diagram showing a schematic configuration of an embodiment of the present invention. In the figure, a manual driving circuit 9 and an automatic driving circuit 10 to which a boarding gate detector 20 for detecting passengers at a boarding gate is connected are connected to a driving operation circuit 11. This driving operation circuit 11 controls an induction motor 21 that drives the escalator. Further, a slow stop circuit 12 is connected to a safety circuit 8 consisting of a safety switch, an overload detector, etc. This slow stop circuit 12 gives an immediate stop command to the driving operation circuit 11 based on the emergency stop signal of the safety circuit 8, and operates the brake 13 immediately.
The driving operation circuit 1 issues a command to slowly stop the induction motor 21 based on a normal stop signal such that 0 does not detect a customer.
Give to 1. In addition, the slow stop circuit 12 is connected to the driving operation circuit 11.
When a slow stop command is given to the escalator, a brake timer 22 as a confirmation braking means is started, and the brake 13 is activated at a time when it is predicted that the escalator will surely stop.

FIG. 2 is a circuit diagram showing a specific configuration of this embodiment. Here, a series connection circuit of a safety circuit 8 and a safety circuit operation detection relay 1, a series connection circuit of a manual operation circuit 9 and a manual operation relay 2, an automatic operation circuit 10 and an automatic operation circuit are connected between DC power supply buses P and N. A series connection circuit of the relay 4, the operation operation circuit 11 and the upward operation relay 5. A series connection circuit of the descending operation relay 6, a slow stop circuit 12, a brake 13, and a brake timer 22 are connected.

Of these, the positive power supply side of the manual operation circuit 9 is connected to the switching terminal of the automatic/manual changeover switch 7 via the normally closed contact 4bl of the automatic operation relay 4, and the positive power supply side of the automatic operation circuit 10 is connected to the switching terminal of the automatic/manual changeover switch 7. The operation relay 2 is connected to a switching terminal of an automatic/manual changeover switch 7 via a b contact 2bl, and a common terminal of the automatic/manual changeover switch 7 is connected to a power supply bus P. Further, an automatic operation timer 3 is connected in parallel to the automatic operation relay 4.

The driving operation circuit it has two input terminals, one of which is a normally closed contact 4b2 of the automatic operation relay 4, a normally open contact 2a of the manual operation relay 2, and a normally open contact of the safety circuit operation detection relay 1. The other input terminal is a normally closed contact 2b2 of the manual operation relay 2, a normally open contact 4a1 of the automatic operation relay 4, and a normally open contact 4a1 of the automatic operation relay 4.
The safety circuit is connected to the power supply bus P through a series connection circuit of normally open contacts 1a2 of the safety circuit operation detection relay 1.

The slow stop circuit 12 also includes a safety circuit operation detection relay 1.
normally open contact 1a3, normally open time limit contact 3 of automatic operation timer 3
a are connected in series.

The normally open contact 5a of the upward operation relay 5 is connected in series to the brake 13, and the normally open contact 6a of the downward operation relay 6 and the normally open contact of the safety circuit operation detection relay 1 are connected to this normally open contact 5a. 1a4, normally open contact 4 of automatic operation relay 4
a2, a contact A1 of a relay (not shown) operated by the output signal of the slow stop circuit 12, and a series connection circuit of the normally closed time limit contact 22b of the brake timer 22 are connected in parallel.

Further, the brake timer 22 is connected in series with a normally closed contact 5b of the upward operation relay 5 and a normally closed contact 6b of the downward operation relay 6.

The operation of this embodiment configured as described above will be explained below.

Safety circuit 8 when all safety detection switches etc. are on the safe side
is in the on state. Therefore, as long as the control power supply is established, the safety circuit operation detection relay 1 is energized.

Here, if the automatic/manual changeover switch 7 is set to the manual side, the manual operation circuit 9 is selected, and the contact 2b of the manual operation relay 2
The automatic driving circuit 10 is disconnected by l. Conversely, if the automatic/manual selector switch 7 is set to the automatic side, the automatic operation circuit 1
0 is selected, and the manual operation circuit 9 is disconnected by the automatic operation relay 4 contact 4bl. FIG. 2 shows a state in which the automatic/manual changeover switch 7 is set to the automatic side.

The aforementioned boarding gate detector 20 is connected to the automatic driving circuit 10. Then, when the entrance detector 20 does not detect a passenger, the automatic operation timer 3 starts operating, and after time-up, the contact 3a is closed and the slow stop circuit 12 starts operating.

On the other hand, during automatic operation, contacts 1a2, 4a2, 2b2
are all closed, and the driving operation circuit 11 energizes the ascending operation relay 5 during the ascending operation and the descending operation relay 6 during the descending operation, respectively, on the condition that they are closed.

By the way, the brake 13 used is one that is in a released state when a current is supplied thereto, and is in an activated state when the current is cut off. Therefore, when the contact 5a of the upward operation relay 5 is closed or the contact 6a of the downward operation relay 6 is closed, the brake 13 is released.

When the safety circuit operation detection relay 1 becomes de-energized due to the operation of the safety circuit 8, all of the contacts 5a, 6a, and 1a4 connected to the brake 13 are opened, and this brake 13 is activated to stop the escalator. Make an emergency stop.

On the other hand, when the entrance detector 20 does not detect a passenger and the contact 3a of the automatic operation timer 3 is closed, the slow stop circuit 1
2 causes the induction motor 21 to stop slowly.

At this time, contacts 1a4, 4a2, A, and 22b are all closed, and brake 13 is in a released state. If the slow stop circuit 12 becomes abnormal during this process, the brake 13 can be operated by opening the contact A.

In addition, the brake timer 22 starts operating in accordance with the slow stop, and the contact 22b
is released to operate the brake 13.

FIG. 3 is a flowchart showing the processing procedure when the functions of this control device are provided in a microcomputer. Here, it is first determined whether automatic operation has been selected (step 111), and if automatic operation has not been selected, the control is terminated. On the other hand, if automatic operation is selected, it is confirmed that the escalator is in operation (step 112). Next, it is determined whether the entrance detector has detected a passenger (step 113). If no passenger is detected, it is confirmed that it is not the set operating time (step 114). Furthermore, after confirming that the safety circuit is not operating (step 115), the slow stop circuit is operated (step 115). Next, the time-up of the brake timer is detected (step 117), the brake is activated (step 118), and the escalator is stopped (step 119).

As a result, it is possible to maintain the function of sudden stopping in an emergency, to bring the vehicle to a gentle stop during normal stopping, and to apply the brakes when stopping is confirmed.

In this embodiment, a timer is used as a confirmation braking means to activate the brake when it is confirmed that the escalator has stopped, but instead of this, the timer is used to detect that the speed of the drive motor has become zero and apply the brake. You can also do it like this.

FIG. 4 shows a system using a zero speed detection device 23 which generates a signal when the speed of the induction electric motor [21] becomes zero as a confirmation braking means, and whose output is given to the slow stop circuit 12 to perform the above-described embodiment. It does the same thing.

Specifically, as shown in FIG. 5, the contact B of the relay operated by the zero speed detection signal of the zero speed detection device 23 may be connected in place of the contact 22b of the brake timer described above.

FIG. 6 is a flowchart showing the processing procedure when the functions of this control device are provided in a microcomputer. Here, the processing performed in steps 111 to 11B in FIG. 5 is performed in steps 121 to 12B. Then, instead of the process in step 117, stoppage of the escalator is detected in step 127, and then step ug in FIG.
, 119 are executed in steps 128 and 129.

As a result, as in the embodiment shown in FIG. 1, it is possible to maintain the function of making a sudden stop in an emergency, to make a gradual stop in a normal stop, and to operate the brake when a stop is confirmed.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the braking sound of the brakes does not echo when the escalator is normally stopped, so even if the escalator is installed in a quiet place, it will not cause discomfort to those around it. Furthermore, since the chances of forced stopping using only the brakes are reduced, the life of the brakes can be extended, and maintenance costs can be reduced and operating efficiency improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a schematic configuration of an embodiment of the present invention, FIG. 2 is a circuit diagram showing a specific configuration of the embodiment, and FIG.
The figure is a flowchart showing the processing procedure when the function of this embodiment is provided in a microcomputer, FIG. 4 is a block diagram showing the schematic structure of another embodiment, and FIG. 5 is a concrete structure of the same embodiment. FIG. 6 is a flowchart showing a processing procedure when a microcomputer is provided with the functions of this embodiment, and FIG. 7 is a flowchart showing an example of control contents of a conventional escalator control device. 7...Automatic/manual changeover switch 7.8...Safety circuit, lO...Automatic operation circuit, 11...Driving operation circuit,
12... Slow stop circuit, I3... Brake, 21...
・Induction motor, 22...brake timer, 23...
Zero speed detection device.

Claims (1)

[Claims] A boarding gate detector for detecting passengers is provided at the boarding gate of the escalator, and the escalator is operated and stopped based on the output signal of this boarding gate detector, and the brake is activated each time the escalator stops. In the escalator control device, when the entrance detector does not detect a passenger, the escalator drive motor is slowly stopped, and the escalator is confirmed to stop due to the operation of the escalator drive motor. A control device for an escalator, comprising: confirmation braking means for operating the brake when confirmed.