JP2000086138A - Controller for escalator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance reliability by reducing the number of wires inside a truss and suppressing the effects of noise and induced voltage through a transmission device, into which status signals of a cluster of truss safety switches forming a safety circuit for an escalator are inputted for serial conversion and which are outputted to a monitoring device. SOLUTION: A safety circuit 12 is constituted of light and left clusters of safety switches 1Sul, 1Sur of upper-floor truss and right and left clusters of safety switches 1Sd1, Sdr of lower-floor truss, whose respective terminals are connected with the respective inputting terminals of right and left transmission units 10ul, 10ur of upper-floor truss and right and left transmission units 10dl, 10dr of lower-floor truss. The respective outputting terminals of the respective transmission units 10ul to 10dr are connected in series and the respective outputting terminals of the respective transmission units 10ul, 10dr are connected with the inputting terminals of a controller 7 by respective signal wirings 15a, 15b. It is thus possible for the controller 7 to transmit a signal to a monitoring device 8 as well as control a motor for driving footsteps and escalator supplies.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an escalator control device.

[0002]

2. Description of the Related Art Conventionally, escalators are extremely public, such as stations and department stores, and are often installed in places where many people need to be transported in a short time. Therefore, if the escalator causes any abnormality and stops, it is necessary to immediately notify the operation manager or the administrator and restart the operation.

In such a case, the status of the escalator is conventionally displayed on a monitoring device (monitoring panel) in a central monitoring room such as a station or a department store. Here, the state of the escalator is the operating state of the escalator, the stopped state of the escalator, the operating direction (traveling direction) of the escalator, and the like.

[0004] Recently, in order to make it easier for the operation manager to resume operation, the number of cases in which which part of the safety circuit installed in the escalator is operating is increasingly displayed. In other words, if the escalator is stopped, and if the display on the monitoring device indicates that the inlet switch on the left side of the upper truss is operating, the administrator should investigate the vicinity of this switch and remove any obstacles to operation. It will be good.

Here, an example of a conventional escalator control device will be described with reference to the schematic configuration diagram of FIG.
Between the positive control bus P (+) and the negative control bus N (-), a safety circuit 12, an operation circuit 13, and a control device 7A, which will be described later, are directly connected, and indirectly via the control device 7A. The monitoring device 8 is connected.

The safety circuit 12 includes an upper floor truss left safety switch group 1Sul, an upper floor truss right safety switch group 1Sur,
The lower truss left safety switch group 1Sdl, the lower truss right safety switch group 1Sdr, and the coil 2 of the safety circuit relay are connected in series.

In this case, each switch group 1S is composed of an inlet switch, a step lifting switch, an emergency stop switch, and a pinch detection switch. Each switch group has a b-contact (normally closed contact) configuration. I have.

[0008] The operation circuit 13 is configured as follows. That is, the positive control bus P (+) and the negative control bus N
Between (-), there are an a contact (normally open contact) 2a of the safety circuit relay, an ascending operation switch 5, a b contact (normally closed contact) 4b of the descending operation relay, and a coil 3 of the ascending operation relay. An a-contact (normally open contact) which is connected to a series circuit and which is included in the ascending operation relay in parallel with the ascending operation switch 5
3a is connected.

Further, between a connection point between the negative control bus N (-) and the a contact 2a and the a contact 3a of the safety circuit relay, a descending operation switch 6 and a b contact 3 included in the ascending operation relay are provided.
b, a series circuit composed of a coil 4 of the descending operation relay is connected, and an a contact (normally open contact) 4 a of the descending operation relay is connected in parallel with the descending operation switch 6.

Then, each switch group 1S of the safety circuit 12
A signal line 11, that is, a harness line in which a plurality of signal lines are bundled, is electrically connected between the mutual connection point and the connection point between the positive control bus P and the connection point with the coil 2 of the safety circuit relay and the input terminal of the control device 7. It is connected to the.

The output terminals LD1 to L of the control device 7A
Dn is connected to the anodes of the status indicators 91 to 9n included in the monitoring device 8, and the common terminal COM is connected to the cathodes of the status indicators 91 to 9n included in the monitoring device 8, respectively.

The control device 7A not only controls an electric motor and an escalator article for driving an endless step for carrying a user, but also has a function for transmitting a signal to the monitoring device 8. Have.

Next, the operation of the conventional escalator control device thus configured will be described. Safety circuit 1
2 switch groups 1Sul, 1Sur, 1Sdl, 1Sd
The open circuit operation signal of r (hereinafter collectively referred to as each safety switch group 1S) corresponds to an operation stop signal for safely stopping the escalator when an abnormality occurs during the operation of the escalator.

When each switch group 1S of the safety circuit 12 is in a closed state, the coil 2 of the safety circuit relay is in an excited state, and the a-contact 2a is turned on. Therefore, the operation circuit 13 below the a-contact 2a operates. It becomes possible.

For example, when the ascending operation switch 5 is closed, the coil 3 of the ascending operation relay is excited, and the a contact 3
Since a is turned on, even if the switch 5 is turned off, the self-holding is performed. In addition, since the b-contact 3b is turned off, even if the descending operation switch 6 is turned on by mistake, the descending operation command is not output because of an exclusive relationship.

Similarly, when the descending operation switch 6 of the operation circuit 13 is operated, the coil 4 of the descending operation relay is excited and the a contact 4a is turned on. . Further, since the b-contact 4b is turned off, even if the descending operation switch 6 is turned on by mistake, the descending operation command is not output because of the exclusive relationship.

As described above, these operation circuits 13 are provided with the safety switch groups 1Sul and 1Su of the safety circuit 12.
If any of r, 1Sdl, and 1Sdr is shut off for some reason, the self-holding circuit for the operation command is shut off. These signals correspond to a part of a motor control signal for rotationally driving the chain on which the step is mounted,
For convenience of explanation, main circuit wiring directly connected to the electric motor is omitted.

[0018]

In the conventional escalator control device described above, the status signal for displaying the status of the escalator is composed of the safety switch group 1Sul,
All the signal lines (wirings) 11 at both ends of the inlet switch, the step lifting switch, the emergency stop switch, and the pinch detection switch constituting the Sur, 1Sdl and 1Sdr are taken in the control device 7A, and based on these inputs. The display signals LD1 to LDn are output to the output terminals LD1 to LDn to the monitoring device 8, respectively, and the status indicators 91 to 9n on the monitoring device 8 are turned on.

As described above, in the conventional escalator control device, the safety switch group 1Sul,
When displaying in detail which part of 1Sur, 1Sdl, 1Sdr is operating, all the terminals of each safety switch group 1S in the upper and lower trusses pass through the terminal box in the control device 7A in the upper truss once. By supplying each terminal to the customer, the safety switch group 1S
Was working or was displayed.

For this reason, each safety switch group 1Sul, 1
Sur, 1Sdl, and wiring logic (wire) from 1Sdr
dlogic) had to be passed through the truss. Here, the wiring logic is a fixed pattern connection between device groups for performing a predetermined function with respect to an input signal.

As the wiring logic passing through the truss, in addition to the status signal line for displaying the status of the escalator, a motor control signal is transmitted to rotate at least the chain on which the step is mounted. And an operation stop signal line for transmitting an operation stop signal for safely stopping the escalator when an abnormality occurs.

Therefore, it is necessary to lay a harness wire in which a large number of signal wires are bundled in the limited space in the truss.
When the escalator has a high head, since the escalator is laid to the upper floor with a harness line longer than the lower floor, erroneous display or the like may occur due to the influence of noise or induced voltage.

The present invention has been made to solve the above-mentioned problems, and can reduce the number of wirings inside a truss. Further, even in the case of a high-head escalator, it is hardly affected by noise or induced voltage and is reliable. It is an object of the present invention to provide a control device for an escalator having high reliability.

[0024]

In order to achieve the above object, according to the present invention, a status signal of a plurality of truss safety switches constituting a safety circuit of an escalator is notified to a monitoring device via a wiring. An escalator control device according to claim 1, wherein said escalator control device includes transmission means for inputting a status signal of said truss safety switch group, converting the status signal into a serial signal, and outputting the serial signal to said monitoring device.

According to a second aspect of the present invention, there is provided a motor control system for driving an endless step by means of a chain by a motor. 2. The escalator control device according to claim 1, further comprising operating means for notifying the monitoring device via a wiring of a motor stop signal for causing the motor to stop.

According to a third aspect of the present invention, there is provided an escalator control according to the second aspect, wherein a wiring logic is provided between the operating means and the monitoring device. Device.

According to the inventions corresponding to the first to third aspects, the escalator status signal can be serially transmitted by the transmission means, so that the number of wirings inside the truss can be reduced, which contributes to a reduction in the number of escalator manufacturing steps. . In particular,
When the machine room is a separate machine room outside the truss, the effect is large. Further, even in the case of a high-head escalator, the escalator is less affected by noise and induced voltage, and has high reliability.

[0028]

An embodiment of the present invention will be described below with reference to FIG. FIG. 1 is a diagram showing a schematic configuration of an embodiment of an escalator control device of the present invention. Here, differences from the conventional escalator control device of FIG. 2 will be mainly described.

In this embodiment, in order to reduce the number of wirings, a motor control signal for rotationally driving a chain on which a step is mounted and an operation for safely stopping an escalator when an abnormality occurs. The two signals of the stop signal and the status signal used to display the status of the escalator handled by the same transmission method are separated from these two signals by transmission means to form separate systems. .
Hereinafter, this will be described.

Each of the aforementioned safety switch groups 1Sul, 1u
Transmission means for inputting the state signals of the truss safety switch groups 1Sul, 1ur, 1dl, and 1dr, converting the signals into serial, and outputting the signals to the controller 7 is provided between r, 1dl, 1dr and the controller 7. .

The transmission means includes, for example, transmission units 10ul, 10ur, 10ur,
dl, 10dr. Each transmission unit 10ul, 10ur, 10dl, 10dr,
Each of them is composed of, for example, a shift register and stores parallel signals from each safety switch group 1S simultaneously or sequentially. Thereafter, each stored bit can be sequentially read out in a predetermined order by the control device 7, for example. It has become.

More specifically, the upper truss left safety switch group 1Sul, the upper truss right safety switch group 1Sur, and the lower truss left safety switch group 1 which constitute the safety circuit 12 are described.
Sdl, the input terminal of the lower truss right transmission switch 10dl, the upper truss right transmission unit 10ur, the lower truss left transmission unit 10dl, the lower truss right transmission unit 10dr, respectively. And each transmission unit 10ul, 10ur,
The output terminals of 10dl and 10dr are connected in series, respectively, and the transmission units 10ul, 1
The signal lines 15a and 15b for electrically connecting between the output terminals of the remaining transmission units 10ul and 10dr among the input terminals 10ur and 10dl and the input terminals (not shown) of the control device 7 are provided. I have.

The control device 7 controls an electric motor for driving an endless step for transporting a user and an escalator article as well as the conventional control device 7A. It has a function for transmitting signals.

The configuration other than the points described above is the same as that of FIG. As described above, the plurality of transmission units 10 are arranged between the harness line in the truss, that is, the plurality of sets of safety switches 1S constituting the safety circuit 12 and the control device 7, and the input terminal of each transmission unit 10 is connected to the input terminal of each transmission unit 10. Each safety switch group 1
S are connected to each other, the output terminals of the transmission units 10 are connected in series, and the output terminal of each transmission unit 10 and the control device 7 are connected by two signal lines 15a and 15b. The inner harness line will be greatly reduced.

In the embodiment of the present invention described above, the status signals for indicating the status of the escalator are the upper truss left safety switch group 1Sul, the upper truss right safety switch group 1Sur, and the lower truss right safety switch group 1Sur in the safety circuit 12. Floor truss left safety switch group 1Sdl, lower floor truss right safety switch group 1Sd
For each switch group of r, the upper truss left transmission unit 10ul, the upper truss right transmission unit 10ur, the lower truss left transmission unit 10dl, and the lower truss right transmission unit 10dr are connected. A signal line from each switch group is connected to this transmission unit 10 by a level line, and based on these input signals, the transmission unit processes the signal and changes the state of each switch by serial transmission to the control unit 7 which is a transmission master. Send information to Since each transmission unit 10 is connected by only several transmission lines, the number of harness lines in the truss is greatly reduced.

At least a motor control signal for rotationally driving the chain on which the step is mounted, an operation stop signal for safely stopping the escalator when an abnormality occurs, and a state signal for displaying the state of the escalator The information transmission means is separated from the control signal for rotating the chain on which the step is mounted, and the information transmission means for the operation stop signal for stopping the escalator safely in the event of an abnormality. Since the information transmission means of the status signal for displaying the status of the escalator is serial transmission, the number of wirings inside the truss can be reduced, which contributes to the reduction of the wiring man-hour of the escalator. Especially when the machine room is a separate machine room outside the truss,
The effect is great.

Further, signal lines 15a and 15 of a status display signal for displaying the status of the escalator on the monitor 8 are provided.
Since only two b's are required, even in the case of a high head escalator, the escalator is not easily affected by noise or induced voltage and has high reliability.

<Modification> In the above-described embodiment, the transmission units in the truss are 10 ul, 10 ur, 10 dl,
As shown by the broken line in FIG. 1, the upper truss transmission unit 10u in which 10ul and 10ur are combined and the lower truss unit 10d in which 10dl and 10dr are combined are divided into two groups, as indicated by broken lines in FIG. May be.

In the above-described embodiment, the monitoring device 8 is provided with the status indicators 91 to 9n. However, any configuration capable of notifying the status signal may be used.
Further, in the above-described embodiment, the control device 7 and the monitoring device 8 have been separated from each other, but they may be integrated into one.

[0040]

According to the present invention described above, the number of wires laid inside the truss can be reduced, and even in the case of a high head escalator, the escalator is less affected by noise and induced voltage and has high reliability. Can be provided.

[Brief description of the drawings]

FIG. 1 is a wiring diagram showing an embodiment of an escalator control device of the present invention.

FIG. 2 is a wiring diagram showing an example of a conventional escalator control device.

[Explanation of symbols]

 1Sul ... upper truss left safety switch group 1Sur ... upper truss right safety switch group 1Sdl ... lower truss left safety switch group 1Sdr ... lower truss right safety switch group 2 ... safety circuit relay 3 ... up operation circuit 4 ... down operation Relay 5 ... Up operation switch 6 ... Down operation switch 7 ... Control device 8 ... Monitoring device 91-9n ... Status indicator lamp 10ul ... Upper floor truss left transmission unit 10ur ... Upper floor truss right transmission unit 10dl ... Lower floor truss left transmission unit 10dr: Lower truss right transmission unit 10u: Upper truss transmission unit 10d: Lower truss transmission unit 12: Safety circuit 13: Operation circuit

Claims (3)

[Claims] 1. An escalator control device which notifies status signals of a plurality of truss safety switches constituting a safety circuit of an escalator to a monitoring device via a wiring, wherein the status signals of the truss safety switches are input. An escalator control device comprising transmission means for converting the data into serial data and outputting the serial data to the monitoring device. 2. An operation control signal for an electric motor for rotatingly driving an endless step by a chain and an operation stop signal for an electric motor for safely stopping an escalator in the event of an abnormality through the wiring. 2. The escalator control device according to claim 1, further comprising operating means for notifying the monitoring device. 3. The escalator control device according to claim 2, wherein a wiring logic is provided between said operating means and said monitoring device.