JPH0710663B2 - Train door switch open / close operation detection device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to opening / closing of a train door switch for detecting whether or not a door switch interlocking with opening / closing operations of a plurality of doors installed in each vehicle of a train is functioning normally. A train that can reliably detect which door switch is malfunctioning even if there is a door switch that is connected in series and could not detect which malfunction was related to the motion detecting device. The present invention relates to a device for detecting an opening / closing operation of a door switch.

[0002]

2. Description of the Related Art In an ordinary train, each vehicle has two to four doors on one side and four to eight doors for getting on and off each side. For example, as shown in FIG. 2 for a Shinkansen or the like, each of the vehicles 11 ₁ , 11 ₂ , 11 ₃ ... 11n (n is an arbitrary integer) has two on one side and four on both sides.
Two entry / exit doors are installed. For the vehicle 11 ₁ , the entry / exit doors 12 ₁ a, 12 ₁ b, 12 ₁ c, 12 ₁ d, and for the vehicle 11 ₂ , the entry / exit door 12 ₂ a, 12 ₂ b, 12
₂ c, 12 ₂ d and door passenger in the vehicle 11n 12na,, 12nb, 12nc, is as 12Nd.

And, each of the above-mentioned doors for getting in and out,
In the vehicle 11 ₁ , the door switches 13 ₁ a, 13 ₁ b, 1 are arranged so as to open and close in conjunction with the opening and closing operation of the door.
3 ₁ c, 13 ₁ d, door switch 1 for vehicle 11 _2.
3 ₂ a, 13 ₂ b, 13 ₂ c, 13 ₂ d, and vehicle 11n
In that case, the door switches 13na, 13nb, 13n
c, 13nd are provided.

Further, as shown in FIG. 3, a door switch 1 on one side of a vehicle 11m (m is an arbitrary integer between 1 and n) 1
3ma and 13mb are connected in series to the electromagnet side terminal of the electromagnetic relay 14m ₁ , and the door switches 13mc and 13md on the other side are connected in series to the electromagnet side terminal of the electromagnetic relay 14m ₂ . The door switches are connected in series so that current flows when all the opening / closing means of the electromagnetic relays are closed.

That is, when the doors and door switches of all the vehicles are operating normally, when the door opening / closing drive device is operated to close all the doors, a current flows through the opening / closing means array of the electromagnetic relay to display some indication. Means indicate the normal state of the door switch. On the other hand, if any of the door switches is malfunctioning, no current will flow through the opening / closing means array of the electromagnetic relays even if all the doors are operated to be opened / closed, and the display means will indicate an improper state of the door switches. It is a thing.

At the time of vehicle inspection, a high-impedance voltmeter 1 is provided between the inspection terminals 15a, 15b and 15c, 15d provided at both ends of the series connection set of the door switches 13ma, 13mb and 13mc, 13md.
6 and 16 are respectively connected. In other words, when operated to close the door, the door switches 13ma, 13m
b and 13 mc, 13 md are closed and the voltmeter 16, 16
Indicates a value of "0", and the door switches 13ma, 13mb and 13mc, 1 are operated when the door is operated to open.
When 3 md is opened and the indication values of the voltmeters 16 and 16 indicate plus, it is determined to be normal.

[0007]

However, in the inspection conducted by connecting the high-impedance voltmeter 16 between the inspection terminals 15a, 15b and 15c, 15d, it is not always possible to perform an accurate inspection. There wasn't.

That is, when there is a malfunctioning door switch that is always open, if all the doors are operated to be closed, the indication value of the voltmeter 16 will show a plus value and an improper state can be detected. , If there is a malfunctioning door switch that is always closed, operating all the doors to close them will cause the voltmeter 16 to indicate "0" and open all the doors. Even if there is at least one door switch that operates normally, however, the indicated value of the voltmeter 16 shows a positive value, and it is impossible to detect a malfunction.

The present invention has been devised in view of the above-mentioned points, and it is extremely easy to determine which door switch is in an improper state regardless of any malfunction of the door switch. It is an object of the present invention to realize a train door switch opening / closing operation detection device that can be reliably detected.

[0010]

In order to achieve the above-mentioned object, a train door switch opening / closing operation detecting device of the present invention comprises:
A train door switch opening / closing operation detection device that detects opening and closing of a door switch that is connected in series and operates according to opening and closing of a plurality of entry / exit doors installed in each vehicle of a train. With photoelectric conversion elements connected in parallel, the output signal of the photoelectric conversion element electrically insulated from the door switch and the door opening / closing drive signal are input to a logical operation circuit, and the output signal of the photoelectric conversion element is By comparing the opening / closing data of the door switch with the opening / closing data in the opening / closing drive signal, it is possible to detect whether or not the door switch operates properly.

[0011]

With the photoelectric conversion element connected in parallel to each door switch connected in series for each vehicle and the output signal of this photoelectric conversion element is used for comparison calculation, the opening / closing detection device of the present invention is electrically connected to the door switch. The door opening and closing detection device and the door switch can operate independently of each other without being affected by or affected by the door switch.

Then, the output signal of the photoelectric conversion element and the opening / closing drive signal of the door are input to a logical operation circuit, and the opening / closing data from the photoelectric conversion element is compared with the opening / closing data in the opening / closing drive signal. It is possible to reliably detect whether or not the door switch to which the photoelectric conversion elements are connected in parallel is normally opening / closing according to the door opening / closing drive signal.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a circuit diagram showing a state in which a train door switch open / close operation detecting device of the present invention is connected to a door switch connected in series for each vehicle such as a bullet train. In the figure, reference numeral 1 is a train door switch opening / closing operation detection device, and 2a, 2b, 2c, 2d are closed or opened according to opening / closing of a train entrance / exit door, and are connected in series on each side of each vehicle. Door switch connected to, 3a, 3b,
3c and 3d are light emitting diodes 4a, 4b and 4 respectively.
c, 4d and phototransistors 5a, 5b, 5c, 5d
A photoelectric conversion element such as a photocoupler comprising 6a, 6a
Reference numerals b, 6c and 6d denote limiting resistors for making the current flowing through the light emitting diode 4 extremely small, 7 an opening / closing drive circuit for driving the door to open and close, and 8 a logical operation circuit for performing a logical operation.

In the photoelectric conversion element 3a, the light emitting diode 4a is connected in series with the limiting resistor 6a and then connected in parallel to the door switch 2a. Similarly, in the photoelectric conversion element 3b, the light emitting diode 4b is connected in series with the limiting resistor 6b. Then, the photoelectric conversion element 3c is connected in parallel to the door switch 2b, and the photoelectric conversion element 3c is connected in parallel to the door switch 2c after the light emitting diode 4c is connected in series with the limiting resistor 6c.
The light-emitting diode 4d is connected in series with the limiting resistor 6d and then connected in parallel with the door switch 2d.

The photoelectric conversion elements 3a, 3b, 3c,
The inter-terminal potentials of the 3d phototransistors 5a, 5b, 5c, and 5d are input to the logical operation circuit 8 via the NOT operation element and the amplifier.

The logical operation circuit 8 sets the inter-terminal potential of the phototransistor 5 of the photoelectric conversion element 3 to, for example, "0" when the door switch 2 is "closed" and "1" when the door switch 2 is "open".
The door opening / closing drive signal from the opening / closing drive circuit 7 is, for example, “closed”.
In the case of, the binary data of "0" and in the case of "open" are taken in as "1", and the binary data of both are compared and calculated.

Table 1 shows a logical value table in the logical operation circuit 8, which matches the binary data of the open / close drive circuit 7.
Regarding the door switch 2 of the photoelectric conversion element 3 that outputs the value data, the door switch 2 of the photoelectric conversion element 3 that outputs “binary”, that is, normal, that does not match the binary data of the opening / closing drive circuit 7, "No", that is, there is a malfunction is detected. In the logical value table, the input data from the photoelectric conversion element 3 is described as two, but the logical value table is not limited to this, and the number of input terminals of the logical operation circuit 8 can be set to an appropriate number. By setting, it is possible to input data from the photoelectric conversion element 3 of the door switch 2 of all vehicles.

[Table 1]

According to the opening / closing operation detecting device 1 for a train door switch of the present invention having the above-mentioned structure, however, binary data from the photoelectric conversion element 3 of the door switch 2 and binary data from the opening / closing drive circuit 7 are stored. Regarding the binary data from the photoelectric conversion element 3 which is compared with the binary data of the opening / closing drive circuit 7 by comparison operation in the logical operation circuit 8, it is appropriately determined that the door switch is in an inappropriate state. It is indicated by normal display means, etc., and when all the binary data are in agreement, it indicates that it is normal.

[0019]

As described above in detail, according to the train door switch opening / closing operation detecting device of the present invention, a photoelectric conversion element is connected in parallel to each door switch connected in series for each vehicle, and the photoelectric conversion element By performing a comparison calculation using the output signal, the opening / closing detection device of the present invention is electrically insulated from the door switch, and can be operated independently of each other without affecting or being affected by the door switch. .

Then, the output signal of the photoelectric conversion element and the opening / closing drive signal for the door are input to the logical operation circuit, and the opening / closing data from the photoelectric conversion element is compared with the opening / closing data in the opening / closing drive signal. It is possible to reliably detect whether or not the door switch in which the photoelectric conversion elements are connected in parallel is normally opened / closed in response to the door opening / closing drive signal.

[Brief description of drawings]

FIG. 1 is a circuit diagram showing a train door switch opening / closing operation detection device of the present invention.

FIG. 2 is a schematic plan view showing a door switch of a train door.

FIG. 3 is a circuit diagram showing a conventional method for detecting opening / closing of a train door.

[Explanation of symbols]

 1 Train door switch open / close operation detection device 2 Door switch 3 Photoelectric conversion element 7 Open / close drive circuit 8 Logical operation circuit

Claims (1)

[Claims] 1. A train door switch opening / closing operation detecting device for detecting opening / closing of door switches which are connected in series and operate according to opening / closing of a plurality of doors for getting on / off installed in each vehicle of a train, A photoelectric conversion element is connected in parallel to each door switch, and an output signal of the photoelectric conversion element electrically insulated from the door switch and an opening / closing drive signal of the door are input to a logical operation circuit to perform the photoelectric conversion. An open / close operation detecting device for a train door switch, wherein the open / close operation data of the door switch is detected by comparing the open / close data of the door switch with the output signal of the element with the open / close data of the open / close drive signal.