KR200273115Y1 - A safety device for the open gap between the sub-way train and the platform - Google Patents

Abstract

The present invention is not only a constant distance between the train and the platform when getting on or off the train through the platform (platform) of the subway station, but in some places the distance is too large to inconvenience many users. In fact, accidents that fall out of the foot or in the case of children falling to the chest is not seriously occurring, the "safety device between the platform of the subway station and the train entrance" to prevent such a safety accident is disclosed.

The present invention provides a power transmission device using the principle of a small DC motor, a motor driving electronic circuit, and a screw jack for reversing the movable safety plate on the floor where each platform of the subway station platform is located, and a contactless point for proper control of the motor. Install devices such as limit switches. It also has a receiver on the platform near the line where the head of the train stops for receiving radio waves transmitted from the train, and a radio transmitter in the driver's seat. When the train enters the platform and stops completely at a predetermined position and turns the door open / close lever to open the door of the train, the signal switch of the wireless transmitter for operating the device of the present invention is turned on at the same time, and the wireless transmitter provided in the driver's seat provides a predetermined signal. The signal is sent by the receiver installed on the platform closest to the transmitter to receive the signal, and at the same time a proper current flows to the motor, and the safety valve fills the gap between the train and the platform within 3 seconds, providing a visual Even if the accident occurs when a part of the human body falls out of the accident, the safety valve receives it, so that an accident is prevented in advance. And when the train driver confirms the passengers getting on and off and closes the door, the signal switch of the transmitter for turning the motor back on is turned on at the same time, and the movable safety plate is hidden in the platform by the procedure opposite to the above, giving no aesthetic or safety problems. Do not.

Description

A safety device for the open gap between the sub-way train and the platform}

The present invention relates to a safety device installed in the space between the subway station platform and the train entrance. The present invention particularly relates to a safety device for installing a safety plate in the space between the platform and the train entrance when the train stops to prevent people from falling into the space.

Until now, not only in Korea, but also in developed foreign countries such as Germany, the distance between trains and platforms is wide, so that when the passengers go up and down, they can see the floor of the lane, which makes them psychologically insecure. Is also frequently occurring.

As a result, passengers are unconsciously stressed by psychological anxiety, and in some cases, they may experience a physical injury or a fall out of the gap between the gaps. For this reason, whenever a train enters a subway stop, passengers are alerted through in-car or on-air broadcasting, but this cannot be a fundamental measure against safety accidents.

However, despite the fact that passengers are always exposed to such dangerous situations, the railroad officials of each country do not take any fundamental measures to prevent these risks, and no technology has been developed for them.

The risk of accidents is particularly high when passengers use trains at night, when trains are carried by children or the elderly, and when passengers flock to work while commuting. These accidents occur every year, but no countermeasures have been prepared until now.

The present invention aims to provide a safety device for fundamentally solving the conventional problems as described above.

1 is an embodiment of a safety device for the space between the subway station platform and the train entrance in accordance with the present invention.

2 is a plan view of the device of FIG. 1;

3 is a cross-sectional view of the device of FIG. 1;

4 is a circuit diagram of the device of FIG. 1;

5 is a solid state limit switch circuit diagram used in the FIG. 1 device.

<Brief description of symbols for the main parts of the drawings>

111: side of the train 112: doorway of the train

113: finish tile of the platform 114: structure of the platform (concrete)

115: movable safety plate 116: bearing roller attached to the movable safety plate

117: guide channel of bearing roller

118 DC motor

119 universal coupling

120: power transmission screw 121,122: solid state limit switch 1 and 2

123: movable flange nut

124: motor drive circuit 125: general-purpose parallel I / O device

126: MPU 211: enclosure

212: bolt fixing hole for the enclosure 213: support for fixing the motor

214: Bolt for fixing motor 215,216: Shielding plate for solid state limit switch

217: fixing bolt for attaching the movable flange nut (123) to the movable safety plate

411: transmitting antenna 412: 900MHz band micro output transmitter

413: Dual Tone Multiple Frequency Generator

414: receiving antenna 415: receiver

416: DTMF Receiver

418: BCD to Decimal Decoder

419 Buffer Gate

420,426: Off Delay Timer

421: buffer gate 422: inverter gate

423: common contact of C1

424: contact point of R3 (ON when the car door is closed)

425: contact point of R1 (ON when the door of a passenger car is opened)

In order to achieve the above object, it is possible to install the devices of the present invention to all the entrances and exits of each passenger car and to install on the platform. Each of them has its advantages and disadvantages. Although the present invention has been described only for the embodiment to be installed on the platform, it is obvious to those skilled in the art that the embodiment of installing the device of the present invention at every entrance of each passenger car does not contradict the spirit of the present invention.

In the present invention, a technique for bridging the gap between the train and the platform can be implemented in various ways. That is, the embodiment of rotating the safety plate and the embodiment of sliding both can be implemented, but the present invention has been described only for the embodiment of sliding the safety plate. However, it is also apparent to those skilled in the art that the embodiment of rotating the safety plate is not contrary to the spirit of the present invention.

In the present invention, the reliability and durability of the operation are improved by using the electronic technology. In addition, the frequency for wireless communication used in the present invention is selected from the 90 MHz band of the FM carrier of the VHF (30 to 300 MHz) band to prevent malfunction, the operation signal of the DC motor is a dual tone multiple frequency (Dual Tone Multiple) It is generated using a frequency generator, and the reception is extremely improved by using a double tone complex frequency receiver.

The present invention includes a dual tone complex frequency generator as a signal generator for driving the motor to rotate the motor counterclockwise or clockwise to serve to push or pull the movable safety plate in. In addition, the present invention uses a carrier wave to transmit the motor driving signal wirelessly from a transmitting side (train side) to a receiving side (platform side) wirelessly.

Safety device according to the present invention, the dual tone composite frequency (DTMF) generator for generating a dual tone composite frequency signal for driving the motor; A transmitter for transmitting the dual tone complex frequency; A receiver for receiving a dual tone complex frequency signal for driving an electric motor transmitted from the transmitter; When the dual tone composite frequency receiver built in the receiver outputs the double tone composite frequency signal received in hexadecimal as a 4-bit digital code, the BCD signal is restored to a decimal number and the H (high) level is set at the output terminal. An output decoder; A buffer gate and an inverter gate for generating an input signal for driving the motor using the H level signal; A Z-80 micro-processing unit (MPU) for controlling a motor driving circuit by receiving the input signal and generating a predetermined driving signal; A general-purpose parallel I / O device connected to said MPU, motor drive circuit, buffer and inverter; DC motor for moving the safety plate back and forth; A power transmission screw of a screw jack for transmitting a driving force of the electric motor; Movable flange nuts for forward and backward movement of the safety valve; A solid state limit switch for stopping position determination of the safety safety plate; In fact, it is equipped with a movable safety plate that gives passengers a sense of security and protects their lives in case of emergency.

Hereinafter, the operation principle of the present invention will be described in detail with reference to the accompanying drawings. Figure 1 shows an embodiment of a safety device for the space between the subway station platform and the train entrance according to the present invention. 1 to 124 is a general DC motor driving circuit, so the description thereof is omitted in the present invention. FIG. 2 shows a plan view of the device of FIG. 1. In particular, Figure 2 shows a state that the movable safety plate is extended toward the train entrance. 3 shows a cross-sectional view of the device of FIG. 1. 4 shows a circuit diagram of the apparatus of FIG. That is, a circuit diagram centering on a transmitter installed on a train side and a receiver installed on a platform side. And FIG. 5 is an operational circuit diagram of a solid state limit switch used in the FIG. 1 device.

In general, when the train entering the station completely stops at a predetermined position of the platform, the driver opens the door of the carriage, for which the driver turns the door open / close lever toward the “open” side. In this case, the input terminals C ₁ and R ₁ (423 and 425) of the dual tone complex frequency generator 413 embedded in the present invention are in contact with each other. In other words, the input switch of the DTMF generator 413 operates in conjunction with the opening / closing lever of the door 112. When the input signal (number of decimal numbers) is transmitted to the carrier of the transmitter 412 digitally in hexadecimal through the output terminal of the DTMF generator 413, the receiver 415 receiving the signal is a built-in DTMF receiver. Received by 416, and output as a 4-bit binary-coded decimal (BCD), the BCD signal is recovered by a decoder 418 to a decimal number. In other words, the numerical value sent from the transmitter 412 is output to the corresponding output terminal of the decoder 418 at the H level. The H-level signal is made by the buffer gates 419 and 421 and the inverter gate 422 into the BCD required for the motor 118 to turn left or right, so that the general parallel I / O device 125 Input to upper or lower C port. The BCD signal input at the H, L, L, and H levels to the upper C port is output to the B port of the general-purpose parallel I / O device 125 to clock the motor 118 via the driving circuit 124. Rotation in the direction CW (CCW when L, H, H, L levels are input to the lower C port), power is transmitted by the power transmission screw 120, and the movable safety plate 115 is advanced to move the sidewall of the train. (111) is approached. At this time, if the solid state limit switch 2 (122) is operated to prevent the movable safety plate 115 from approaching the train for a predetermined length or more and outputs the output signal at a low level (L), the signal is a general-purpose parallel I / O device 125. Is inputted to the A ₀ terminal of the A port of the input port, and the input signal is output at the L level from the B ₀ terminal of the B port of the I / O device 125 to deactivate TR ₁ to power the motor 118. Shut off and stop the motor. When the driver turns the door operation lever to "close" to close the door 112 of the train, the transmitter transmits a predetermined DTMF signal in conjunction with the lever, and the frequency of the DTMF signal Use a different frequency than when opened to prevent interference. The operation when closing the door 112 of the train is similar to when opening the door.

Hereinafter, the present invention will be described on the basis of the case that the subway tracks are each round-trip primary, that is, the total secondary lanes. For convenience, the reciprocating lanes are referred to as upward and downward lines, respectively.

First, the memory of the Z-80 Micro Processing Unit (MPU) 126 selected in the present invention is defined, and the A port, the upper C port, and the lower C port of the general-purpose parallel I / O device 125 are input ports. , Initialize port B to output port.

For high quality communication, FM carrier wave of 90 MHz band is used in VHF (30 MHz to 300 MHz) band, and transmitter used by up-line train and transmitter used by down-line train have sufficient carrier wave to each other. Have a car so that there is no interference. The output of the transmitter is a micro output with a maximum reception distance of about 100 m, and even in the case of a transit station, each transmitter has a sufficient carrier wavelength difference so that there is no fear of interference.

In order for the device of the present invention to be synchronized with the door opening and closing of the train, the train driver makes contact with the input signal terminal of the DTMF generator of the transmitter at the initial point of operation of opening or closing the door opening lever. The reason why the input terminal of the DTMF generator is contacted at the initial time of operation of the door opening / closing lever as described above is that the time required for the door of the train to actually “complete” or “close” is about 3 seconds each. Of course, the power of the transmitter is always on.

Hereinafter, the case where there are two lanes of up and down lines will be described in detail. After the ascending train stops completely on the platform, the moment the driver starts to turn the door open lever toward "dog" to open the train door 112, the contact 423 and the contact 425 mounted on the open and close lever come into contact with each other. and is input to the terminal to which the connection of the C ₁ and R _1, multi-frequency (frequency of occurrence of C _1, the number 1 of a dual tone multi-frequency generator 413 is incorporated in the transmitter 412 is 1209㎐, in which R ₁ 697 Will be output digitally in hexadecimal format. When the complex frequency for the number 1 is received at the receiver 415 on the carrier of the transmitter 412, the complex frequency of the number 1 is embedded in the receiver 415 in hexadecimal notation. Is input to the input terminal, and its output is output as a 4-bit digital code, i.e., a BCD code of L, L, L, H. When the BCDs of the L, L, L, and H are inputted to the decimal decoder 418 and the output terminal Q ₁ is output at the H level, the buffer gate is further stabilized to further stabilize the H level signal of the Q ₁ output terminal. After passing through 419, an off delay timer 420 causes the H level to continue for about 5 seconds. The reason for interposing the off delay timer 420 is as follows. That is, when the door 112 of the train is opened as described above, the contacts 423 and 425 come into contact with each other. If the contact duration is less than 3 seconds, which is the time required to complete the door 112, the movable safety plate 115 is sufficient. Since the input signal for driving the motor 118 may be interrupted in a state where it does not come out, the motor 118 may stop. Therefore, in order to prevent such an accident, a 5 second off delay timer is provided in the present invention. Interpose. The H level signal output from the off delay timer 420 is converted into signals of H, L, L, and H levels using the buffer gate 421 and the inverter gate 422 to convert the H level signals of the general-purpose parallel I / O device 125. Enter the upper C port. The input H, L, L, and H level signals are output at H, L, L, and H levels from the B port of the general-purpose parallel I / O device 125, which is input to the motor driving circuit 124. do. Accordingly, TR ₁ and TR ₄ of the driving circuit 124 are activated, and the driving voltage E + is added to the DC motor 118 so that the electric motor 118 rotates clockwise CW. In this embodiment, the rotation speed of the electric motor 118 is set to 875 rpm. Increasing the number of revolutions of the motor to about 1750rpm also has the advantage, but also has the disadvantage of increasing the vibration of the power transmission screw (120).

A universal coupling 119 is interposed between the electric motor 118 and the power transmission screw 120 to smoothly rotate the power transmission screw 120. The motor 118 is fixed to the enclosure 211 by the support for fixing the motor 213, and the movable flange nut 123 is fixed to the movable safety plate 115, so that the power transmission screw 120 is clockwise. When rotated, the movable safety plate 115 is pushed to the left, that is, the train side in FIG.

When the movable safety plate 115 proceeds to a predetermined position, the shielding plate 216 for the contactless limit switch 2 is inserted into a slit of the contactless limit switch 2 122, and thus, the limit switch 2 122 The output becomes L level, the L level signal is inputted to the A ₀ terminal of the A port of the general parallel I / O device 125, and the B ₀ terminal of the B port becomes the L level so that TR ₁ is deactivated and eventually becomes The electric motor 118 stops. The process so far should be done in 3 seconds. In the present invention, a light emitting diode and a phototransistor are used to recognize whether the shield plate 216 is inserted into the limit switch 2 122.

Whenever a subway train stops on a platform, it is advisable to broadcast in the train so that the foot does not fall into the gap. Actually, the distance is about 10cm to 20cm. The movable safety plate 115 must move 6.7 cm per second (= 20 cm / 3 seconds) to advance 20 cm in three seconds. On the other hand, the motor 118 rotates 43.75 (= (875 r / min) / (60 s / min) x 3 seconds) for 3 seconds. That is, since the movable safety plate 115 moves 20 cm when the electric motor 118 rotates 43.75, the power transmission screw 120 moves the movable flange nut 123 at 0.457 cm (= 20 cm / 43.75 r) per revolution. . Therefore, if the pitch of the power transmission screw 120 is set to 0.5 cm, there is sufficient margin (0.5 cm / r x 43.75 r = 21.9 cm). Therefore, the pitch of the power transmission screw 120 shall be 5 mm.

Since the required travel distance of the movable safety plate 115 may differ for each platform, this adjustment is possible by adjusting the position of the contactless limit switch 2 122 or the shielding plate 216 for the contactless limit switch.

The common contact C ₁ (423) and the contact R _3, which end is to get on and off the device, the opening lever the operator turning the lever exit opening towards the "waste" to close the door (112) of the train (424, occurrence frequency is 852Hz) is When the DTMF generator 413 transmits the dual tone complex frequency corresponding to the decimal number 7 to 16H digital, the DTMF receiver 416 receiving the received dual channel frequency of the number 7 receives the 4-bit BCD, L Outputs H, H, H level. The decimal decoder 418 receiving the input signals of the L, H, H, and H levels outputs the number 7 to the Q ₇ output terminal at the H level. As described above, L, H, H, and L levels are generated via the off delay timer 426, the buffer 421, and the inverter 422 to the lower C port of the general-purpose parallel I / O device 125. When input, output L, H, H, L level from the B port of the device 125, the motor 118 is rotated counterclockwise (CCW) so that the movable safety plate 115 is retracted to reach a predetermined position If the contactless limit switch 1 121 outputs the L level and is input to the A ₁ terminal of the A port of the general-purpose parallel I / O device 125, and outputs the L level to the B ₁ terminal of the B port in the counterclockwise direction. The rotating motor 118 is stopped by inactivation of TR ₂ of the driving circuit 124.

As described above, the present invention has the effect of preventing accidents of passengers that may be caused by more than necessary space existing between the platform of each station and the train door. In particular, each station can be easily set by adjusting the position of the limit switch or the shield for the limit switch due to the difference between the train and the platform.

In addition, the up and down trains, as well as the transmitters of other trains operating at the transit station, use carriers of different frequencies to transmit and receive from the platform receivers.

Claims (4)

In the safety device to protect passengers from danger caused by space between train and platform, Train door opening and closing device for opening and closing train doors; It is installed on the platform and operates in conjunction with the door opening and closing device, and when the train driver stops on the platform and the train driver operates the train door opening and closing device "open", the space is slid from the predetermined position of the platform to the space between the train doors and the space The door is completely opened after blocking the unit, and the movable safety plate that is slid when the train driver operates the train door opening / closing device "closed" and returns to a predetermined position in the platform; An electric motor installed on a platform to provide a driving force for sliding the movable safety plate; A double tone composite frequency generator installed in a train and generating a double tone composite frequency (DTMF) signal for driving the motor according to an operation of the door opening / closing device; A transmitter installed in a train for transmitting an output signal of the dual tone complex frequency generator to a platform into which the train enters; A receiver installed on a platform for receiving a complex frequency signal transmitted from the transmitter and converting the complex frequency signal into a digital code of a predetermined bit; A decoder installed at a platform to decode an output signal of the receiver; A general-purpose parallel I / O device installed in the platform and inputting the output signal of the decoder through a buffer and an off delay timer, and then input again through a plurality of parallel buffers and inverters; An electric motor driving circuit installed in the platform and inputting an output signal of the I / O device to drive the electric motor; And And a MPU installed on the platform and connected to the I / O device to control operation of the motor drive circuit. The method of claim 1, wherein A guide channel for guiding the movable safety plate; Means for converting the rotational motion of the electric motor into linear motion; And And a plurality of limit switches for detecting and controlling the operation position of the movable safety plate, the space safety device between the subway station platform and the train entrance. The transmitter and receiver of claim 1 or 2, wherein the transceiver uses an FM carrier in the 90 MHz band in the VHF (30 MHz to 300 MHz) band, and up and down trains use a wavelength difference of a predetermined size to prevent interference with each other. Transmitting the dual tone complex frequency using a carrier having, and limiting the maximum receiving distance of the transmitter output within a predetermined distance, the space section safety device between the subway station platform and the train entrance. According to claim 3, wherein the setting for sliding the movable safety plate according to the required travel distance of the movable safety plate different by the platform conditions of each history, characterized in that made by the position adjustment of the limit switch or the limit switch shielding plate , Space safety between subway station platform and train entrance.