JPS58180374A - Point control type block device for train - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a point-controlled block system for trains.

The train is equipped with an upper sheath consisting of a resonant circuit, and at predetermined positions at the entrance and exit of a predetermined section of the train running path, a ground shear that is electromagnetically coupled to the above-mentioned onboard shear and is connected to the above ground sheath. By arranging a receiver and an output relay, it is possible to detect that a train has entered the predetermined section of the running route, prevent the following train from entering the predetermined section, and prevent the train from entering the predetermined section. A point-controlled block device that detects when a train has advanced from a predetermined section and allows a subsequent train to enter the predetermined section is already known (see, for example, Japanese Utility Model Application Publication No. 168466/1983).

However, the known point-controlled block device has a pair of normally oscillating type entry detection circuit at the entrance of the block section and an emergency oscillation type entering detection circuit at the block section exit, and detects the block section for one block section. In other words, a pair of detection circuits are provided in each block section.
The disadvantage is that an advance detection circuit and an entry detection circuit must be provided at the boundaries of each block section, making the structure of the device complicated.

In addition, in the above-mentioned known point-controlled block device, the ground element at the block section entrance has a constantly oscillating circuit configuration, so failure can be detected in the event of a failure; however, the ground element at the block section exit is a Since it has an emergency oscillation type circuit configuration that oscillates when electromagnetically coupled to the oscillator, it has the disadvantage that failure detection cannot be performed in the event of a failure.

In view of the above-mentioned points, the first invention of this application aims to provide a point-controlled block device for a train that has a simplified configuration and can easily detect a failure when it occurs. do.

Next, an embodiment of the first invention will be described based on the drawings.

FIG. 1 is a conceptual diagram schematically showing the configuration of the first invention, where T is a train, RT is a rail that forms the running route of the train, and O'l", l'l", and 2T are blocks. section,
Is, 28 is a block signal. In this invention, an onboard element (EA) composed of a resonant circuit is installed under the floor of the train T, facing downward outside the train.

In addition, at each block boundary, ground switches WC1, WC2, etc. are arranged between the rails RJ and at positions where they are electromagnetically coupled with the incoming onboard subassembly OA, Detection circuit section L that uses the ground L as one of its constituent elements
, T(, 2... are connected to each other, and the detection circuit units R1 and R2 installed at the adjacent block boundaries are installed for the block section IT between the boundaries and are controlled by their detection outputs. One block logic relay circuit section LO
,It is connected to the.

The above-mentioned schematic configuration will be explained in more detail based on FIG. 2.

The detection circuit units R+, R2, . . . all have similar configurations. To simplify the explanation, only R3 will be explained as a representative. The detection circuit connects the ground element WO+ installed at the block boundary to the feedback circuit at a frequency fo that is 1-1 and different from the resonant frequency of the vehicle's 1 element. An oscillator 0801 that constantly oscillates at a frequency f, which is connected to this oscillator. a first selection amplifier 5Ao-1 that operates with respect to the oscillation output of W 080°; a first relay M1 (.-4) that operates with the output that is amplified and rectified by this first selection amplifier; A second selection amplifier 1 is connected to the train car and operates for the same frequency as the resonant frequency f1 of the train car 1 child OA.
The second relay MR, -1 is operated by the output amplified and rectified by this selective amplifier.

1, the block logic relay circuit unit LO connects a preset switch SW to the block relay 1'TR in the 1-α column, and connects the preset switch SW to the block relay 1'TR in parallel to the preset switch, and connects the block logic relay circuit LO to the block relay 1'TR, and connects the block logic relay circuit section LO to the block relay 1'TR, and connects the preset switch SW to the block relay 1'TR in parallel to the preset switch. Inserting the first relay Ml (operating contact 0M ratio of the circuit part R),
This operating contact is the operating contact 01 of the blocking relay ITR.
'l' R11 is connected in series, and in parallel with this operating contact, the second relay of the detection circuit corresponding to the exit side boundary of the block section is connected, -2's operating contact 0?14R, - i
! It is configured by providing.

Figure 2 shows a block logic relay circuit section LC in which the resonant frequency of the first child OA of the train T is fl, and in order to perform the intended operation when the train moves to the right in Figure 2.
1 is shown.

Now, the effect of the above configuration when the train moves rightward from the position shown in FIG. 2 will be explained.

Oscillator 080 of each detection circuit section R,, R2. ,0802
is always f using the ground coils WC, WC2 as a feedback circuit. It oscillates at a frequency of f, and its oscillation output is f. It is amplified and rectified by selection amplifiers SAo, , 8Ao, and operates the first relay MR8-14MRo-2. When the power is turned on, confirm that there is no train in the block section IT, and then press down on the preset switch.The block relay ITR will operate, and the closing of its operating contacts 01TR2 will turn on the blue lamp G of the signal Is, indicating that the train is in progress. show

In addition, along with the operation of the block relay, its operating contact ClT
R is closed, and the first relay is now in use. Since the operation contacts OMR and o-+ of -1 are closed, the block relay 1'f'R self-maintains its operation even if the preset switch SW is opened.

Train T is moving to the right and the onboard CA is in block section I.
When electromagnetically coupled with the back of the ground coil installed at the population side boundary of T, the oscillator 08CI of the detection circuit section changes its frequency to the resonant frequency f1 of the onboard coil OA.
Since the output of - and disappears, the first relay MRo-t is restored. Therefore, the operating contact OMR4) of the 11th J relay
, opens, so the block relay ITR is restored, and the blue lamp G of the traffic signal 18 goes out due to the opening of its operation contact 01TR2, and the red lamp R lights up due to the closing of the recovery contact 01TR3, which sends a stop signal. Show and block section 1r
P is blocked. In other words, when the train enters a block section, the first relay plate is activated. When , is restored, train entry is detected, and based on this, block relay ITR is activated.
is restored, block section IT' is blocked,
The IS signal indicates that following trains are prohibited from entering the block section IT. In addition, the f1 configuration is amplified and rectified by the second selection amplifier SA,-, for fl, and the second relay plate,
-1 is activated. Second relay MR, - of each detection circuit section
, MR, -2 are all similar in use, and will become clear from the later explanation of the second relay rope -2 of the exit side detection circuit R2.

When the electromagnetic coupling between the onboard coil OA and the entrance side ground coil WC1 is lost, the oscillator O8C of the detection circuit R2 returns to f. Since it oscillates, the first relay plate. -1 operates, but the operating contact OiTR of the block relay, the second relay 1m of the block section exit side detection circuit section, and the operating contact C of -2! ? v
Since fR,-,, is open, block relay 1'I
'R maintains the recovery state.

As the train T continues to advance, the onboard OA reaches the exit side WO.
2, the oscillator 08C2 of the exit side detection circuit R2 similarly changes its frequency to the resonance frequency 11 of the vehicle J1, so that the first relay MRa-2 is restored. The operating contact of this first relay is connected to a block logic relay circuit section (not shown) provided for the block section 2T and a block logic relay circuit section (not shown) provided for the block section IT shown in FIG. Since it is inserted in the same arrangement as LC0, the first relay 1 is inserted. 1, the train entry is detected in the block logic relay circuit section of the next block section 2T. That is, in the block device according to the present invention, each detection circuit section (for example, horse) serves as an exit side detection circuit section for detecting the advance of a train for one block section (for example, I'J'), and also serves as an exit side detection circuit section for detecting the advance of a train for one block section (for example, I'J'). For the block section (for example, 2T), it becomes an entrance side detection circuit section that detects the entry of a train.

In addition, due to the electromagnetic coupling between the train 〒car''-child OA and the exit side ground wire wc2, the oscillator 08C2 of the output side detection circuit section
Since the frequency changes to f, the second relay 1114It1-2 is operated via the second selection amplifier SA, , -2.

Therefore, since the operation contacts OMR, 2 of the second relay inserted in the block logic relay circuit section T, CI are closed, the block relay 1'I'R, which had been restored until then, operates, and its recovery contact 01TR3 Due to opening of and closing of operating contact clTR2, the traffic light ISO red lamp R goes out and the blue lamp G goes out.
lights up to indicate the progress signal, and the block in the block section IT is released.

That is, in this first invention, when the onboard element is electromagnetically coupled with the ground element, the first relay of the detection circuit section connected to the ground element is restored and the train to the relevant block section is activated. Detecting the approach and starting the block for the block section, and operating the second relay to detect the advance of the train from the block section immediately before the block section, and block the block section immediately before the block section. unlock.

When the electromagnetic coupling between the train's onboard switch OA and the exit side ground switch WC2 disappears, the oscillator 0802 returns to f. The first relay kite to oscillate. -2 is f again. , the first relay MR,-2 operates, and the second relay MR,-2 oscillates at
day.

FIG. 3 shows a time chart showing the advancing position of the train and the corresponding operating states of each relay.

As described above, according to the first invention, each closed boundary has a first relay that is restored when electromagnetic coupling occurs between the onboard element and the ground element of the train, and a second relay that operates. For each block section, only one detection circuit section having the same configuration is arranged, and the contact conditions of the first relay of the entrance side detection circuit section and the second relay of the 1m side detection circuit section are arranged for each block section. By simply installing a block logic relay circuit section with a block relay that can be restored and operated, vehicle presence detection in each block section,
Since absent vehicle detection is possible, the configuration of the device is significantly simplified and equipment costs are reduced.

Further, in the first invention, the ground wire W of the detection circuit portions R, R2
Both C+ and WO2 are of the constant oscillation type, and the detection circuit section is of the constant oscillation type and constitutes a closed circuit, so for example, a receiver that operates at the resonant frequency of the onboard element and a relay connected to the receiver may be provided. .

By forming an exclusive OR circuit with the operating contacts of the relay and the operating contacts of the relays in the detection circuit described above, and monitoring the presence or absence of output from that circuit, it is possible to easily detect the occurrence of a failure in the detection circuit. I can do something.

When the present invention is applied to a train traveling to the left on the running path shown in FIG. Since it will be the detection circuit section, the block theory Jl of this block section IT'! The IJ relay path section has zero relay contacts in the block logic relay circuit section of FIG. , , 01
In place of 'l'R, 0 plate and -2, the contacts of the first relay MRo-2, the block relay ITR, and the second relay 2 to 1 are inserted, respectively.

By the way, if a train normally runs in both left and right directions on the same running route, it is not possible to independently provide a block logic relay circuit section consisting of the above-mentioned L ft relay contacts and a block relay for each direction. , equipment costs are high.

Therefore, this instant second invention has a simple configuration that allows trains to operate in both directions on the same route.
The purpose is to make the invention applicable.

FIG. 4 is a configuration diagram showing an embodiment of the second invention. As is clear from the figure, the detection circuit sections R and R disposed at each block boundary have the same configuration as in the first invention. In this invention.

A selection circuit section SC consisting of a first traveling direction relay ILI (and a second traveling direction relay LR) operated according to train traveling direction conditions r and t for the train traveling route is provided, and a block logic relay circuit section LC2゜ is provided with: The preset switch SW, the first traveling direction relay circuit LC2, and the second traveling direction relay circuit LC2□ are connected in parallel to form a parallel circuit M, and one block relay 1 is connected to this parallel circuit.
It is constructed by connecting 'I'R in series.

The first traveling direction relay circuit LC2I includes an operating contact CRR of the first traveling direction relay RR, and an inlet side detection circuit section R in the first traveling direction of one block section IT.
1, operating contact 0 skin of the first relay.

and block relay lTl1. Operating contact a t q'R
, -, are connected in series, and the operating contact Q1'
The operating contacts OMR+-i of the second relay of the exit side detection circuit section in the first traveling direction are connected in parallel to J'R, . The second traveling direction relay circuit LC2□ includes an operating contact OLR of the second traveling direction relay LR, and an operating contact CMRo= of the first relay of the entrance side detection circuit section R2 in the second traveling direction of the block section IT. 2 and operating contacts 01TR+-2 of the block relay ITR are connected in series, and the operating contacts ClTR1-2 are connected in series to the operating contacts 01. −, are connected in parallel.

With the above configuration, when the train travels in the first direction (rightward in FIG. 4) on the same running route, the first traveling direction relay RR operates according to the traveling direction condition r, and therefore, the first traveling direction relay RR operates. Circuit LO2, blocked by relay 1
'I'R becomes controllable, and when the train moves in the second direction (leftward in FIG. 4), the second direction relay LR operates according to the direction condition t, and therefore,
The block relay ITR can be controlled by the second traveling direction relay circuit LC22. The direction of travel of the train and the corresponding operations of each relay etc. are as shown in FIG.

” = As described above, according to the second invention, the first . A selection circuit section having a second traveling direction relay is provided, and for each block section, when the first traveling direction relay is operating, the second traveling direction relay is operating in the first traveling direction. In the second traveling direction, when the first relay of the entrance side detection circuit section of the block section is restored, the contact condition of the 11th J relay is restored and the presence of a train in the block section is detected.
and a block logic relay circuit having a block relay that operates under the contact conditions of the second relay when the second relay of the exit side detection circuit section of the block section is operated to detect the absence of a train in the block section. Therefore, the first invention can be applied to trains running in both directions on the same route with an extremely simple configuration.

By the way, the known point-controlled closure device mentioned at the beginning also
The main point I mentioned above is 1. The second invention is also provided with only one car pulley, for example at the head of the train, so if the growth of the running train is not constant, it is difficult to know when the train will completely enter a certain predetermined section. It is difficult to perform strict train control, especially for trains with different formations, because it is not possible to detect when the train has completely advanced from a certain section to the tail end. There are drawbacks.

Therefore, the third invention of this application is capable of simplifying the device configuration and facilitating failure detection like the second invention, and also when the train growth is not constant. The train has also been improved to allow strict train control.
The purpose of the present invention is to provide a point-controlled blocking device for trains.

The third invention will be explained in detail based on the drawings from FIG. 6 onwards.

In this invention, under the floor of the front and rear parts of the train T, an onboard child C is constructed of resonant circuits having different resonance frequencies.
! A, OA2 is installed facing downward on the outside of the vehicle. At each block boundary, there is a beacon WC19w02 at a position where it is magnetically coupled with the incoming onboard child OA, , OA, between rails 1 (14).
A detection circuit section R11+u, 2 is connected to each ground element, and the detection circuit section R11+u,2, which has the element as one of the components, is connected to the ground element, and the detection circuits are installed at the adjacent boundaries of the block section. The section R11+RI2 is one block logic relay circuit section LO that is provided for the block section IT between the boundaries and is controlled by its detection output.

It is connected to the.

The detection circuit section R++ and TL12 both have the same configuration as in the case of the invention described above. To explain R11 representatively, the detection circuit section connects the ground element WO installed at the boundary of the block section to the feedback circuit and has a frequency f different from the resonant frequency of any EiL upper element. An oscillator 080° that constantly oscillates at
Frequency f. The first selection amplifier 5Ao-+, which operates on the oscillation output of
The first relay is operated by the rectified output.
3, and an upper OA of the rear car of the train, which is connected to the oscillator OSC.

a second selection amplifier SA, -, which operates at the same 1'-frequency as the resonant frequency of , and a second relay M, which is operated by the output amplified and squared by this selection amplifier, IN,σ.
It consists of R.

In addition, the block logic relay circuit section LO, is connected to the block IJ
A preset switch history is connected in series to v-ITR, and the first one of the detection circuit section R11 corresponding to the block section entrance 11111 boundary is connected in parallel to the preset switch.
relay plate. -1 operating contact OMR, is inserted, and operating contact 0 of the blocking relay ITR is inserted into this operating contact.
1'['R, are connected in series, 1 and further, in parallel with this operating contact, a second relay of the detection circuit section R, 2 corresponding to the boundary on the exit side of the block section is connected. The operating contact OMR,2 is provided.

Figure 6 shows the resonance frequency of the top car OA2 on the train deck.
2. The resonant frequency of the rear car upper OA is set as f, and the detection circuit R11°R12 and the block logic relay circuit are used to perform the intended operation when the train moves to the right in Fig. 6. An example of a configuration of LC is shown.

Now, the effect of the above configuration when the train moves rightward from the position shown in FIG. 6 will be explained.

Oscillators osc, , os of each detection circuit section R, , R, □
c2 is always f with the ground F element WC,, w02 as a feedback circuit.
. It oscillates at a frequency of f, and its oscillation output is f. are amplified and rectified by selection amplifiers SAo, , SAo, , for operating the first relays MRo-, +MRO-2. When the power is turned on, confirm that there are no trains in the block section IT and press down on the preset switch SW.
Block relay l〒R operates, and its operating contact 01'll
'By closing R2, the blue lamp G of the traffic light Is lights up,
Show progress. In addition, as the block relay operates, its operating contact 01TTL closes, and now the operating contact OMRO-1 of the first relay MRo is closed, so even if the preset switch is opened, the block relay IT
R is self-maintaining.

When the train T moves to the right and the top car head OA2 is electromagnetically coupled to the ground head WC installed at the entrance boundary of the block section IT, the oscillator OSC of the detection circuit R11 is activated by the top car OA2. In order to change the frequency to the resonant frequency f2 of CA2, the first
Since the output of the selection amplifier SA o-1 disappears, the first relay MRo-+ is restored. Therefore, the operating contact OMRo-, of the first relay opens, so that the blocking relay ITR returns 11] and its operating contact G! Due to the opening of lTR2, the blue lamp G of the traffic light tS goes out, and the recovery contact C! l
When TR3 is closed, the red lamp R lights up, indicating a rh stop, and the block section logic is blocked. In other words, when the head of the train enters the block section, the first relay MR,
. When + is restored, entry to the head of the train is detected, and based on this, the block relay ITR is restored to block the block section IT, and the signal Is indicates to the following trains that they are prohibited from entering the block section IT. .

When the electromagnetic coupling between the leading car overboard OA2 and the entrance side beacon is lost, the oscillator OSC of the detection circuit R0.

is f again. Since it oscillates, the first relay plate. -1 operates, but the operating contact CI'rT of the block relay (,, and the second relay MR of the block section exit side detection circuit section R12,
Since the operating contacts OMR, -, are open,
Block relay 1'J''R maintains the restored state.

As the train progresses further, the upper OA of the rear car is on the ground on the entrance side.
When electromagnetically coupled with f-WO+, the oscillator 080. of the block section population side detection circuit R1. The rear car is OA.

In order to change the frequency to the resonant frequency f1, the first relay wear repeats 11]. The f1 component is amplified and rectified by the second selection amplifier SA, and the second relay Ma,
, make it work. Through the operation of the second relay MRH-H, it is detected that the rear end of the train T has entered the block section IT. The applications of the second relays M pasted 1+1 and 1-2 of each detection circuit section are all the same, and as will be explained later regarding the second relays MR and 2 of the output side detection circuit section 1 (12). reveal.

When the electromagnetic coupling between the rear vehicle upper element CAI and the entrance side ground element WC1 disappears, the oscillator OSC returns to f. oscillates, the second relay MR, recovers and the first relay M1 (4
)-1 works.

Next, the train T moves forward and the top car upper case CA2 is placed on the exit side -
When electromagnetically coupled to pwa2, the oscillator OSC,, of the exit side detection circuit R12 has the resonant frequency f of the leading onboard element.
2, the first relay MRo-2 is restored.

The operating contact of this first relay is connected to a block logic relay circuit section (not shown) provided for the block section 2T.
The first relay plate is inserted in the same arrangement as the block logic relay circuit unit LC2 provided for the block section IT shown in the figure. -2, the entry of the front end of the train shell is detected in the block logic relay circuit section of the next block section correction. That is, in the blocking device according to the present invention, each detection circuit section (for example, R12)
For one block section (for example, IT), it serves as an exit side detection circuit that detects the entry of a train, and for the next block section (for example, 2'l'') it serves as an entrance side detection circuit that detects the entry of a train. It becomes the side detection circuit section.

The second relay plate -2 of the exit side detection circuit section R32 maintains the restored state when the leading onboard car element CA2 is electromagnetically coupled to the exit side ground element WC2. And the top car OA2
When the electromagnetic coupling between the ground terminal WC2 and the exit side earth terminal WC2 disappears, the oscillation 'aO8C2 becomes f again. Because it oscillates, the first relay plate. -2 works.

Next, the tail car of the train - child OA1 is on the exit side ground switch WO.
When electromagnetically coupled with 2, the oscillation "a" of the exit side detection circuit section
O8C2 changes frequency to the resonance frequency f of the rear vehicle upper element, so the first relay Mill. -2 was restored and f.

The component id, f is amplified and rectified by the second selection amplifier SA, -2 and operates the second relay MI (1-2. Therefore, the second selection amplifier SA, -2 for the component id, f is operated.
Relay operating contact G! Since Ml't, -2 is closed, the block relay ITR, which had been restored until then, operates,
Opening of the recovery contact 01T and operation contact C! lTR
2, the red lamp R of the traffic light Is goes out, the blue lamp G turns on, and the block in the block section l is released. That is, when the rear end of the train advances from a certain block section, the second relay of the exit side detection circuit section operates L f
t, the complete advance of the train is detected, and the block relay that had been restored until then in the block logic relay circuit section corresponding to that block section is operated, and the block of that block section is released.

When the electromagnetic coupling between the train's tail car 1 child OA and the exit side ground element WC2 disappears, the oscillator 08C2 oscillates at fo again, so the first relay 0-2 operates, and the second relay MR, -2 is restored.

FIG. 7 shows a time chart showing the operating states of each relay etc. as the train progresses.

As mentioned above, in this invention, if we look at one block section IT, the approach of the head of the train causes the first relays 1 and -1 of the population side detection circuit sections R and □ to switch back to IB.
Based on this, the block relay ITR of the block logic relay circuit section LC1 is restored, detects the presence of a train in that block section, starts blocking that block section, and also moves the rear part of the train to the exit side. The second part of the detection circuit section R1□
Relay plate -2 is activated, and based on this, the block relay ITR of the block logic relay circuit section LC1 is activated to detect the absence of a train in that block section, and release the block in that block section. It is something.

Hereinafter, F is the configuration of the device applied when the resonant frequency of the leading car's upper child is f2, the resonant frequency of the trailing car's child is fl, and the train is moving to the right in Fig. 6. If the wall train is traveling to the left in the same direction as shown in Figure 6, the structure illustrated in Figure 8 is used to prevent trains from entering and exiting the block section IT using the same method. Detection is possible, and the same effect as in the embodiment shown in FIG. 5 can be obtained.

As described above, according to the third aspect of the invention, train detection is performed based on the front head approach detection and the rear tail advance detection, so it is possible to perform train detection in accordance with the actual situation regardless of the train size growth of a single train, and to perform strict train detection. Train control becomes easier.

Also, in this invention, since the detection circuit uses a constantly oscillating oscillator, it is possible to easily detect the occurrence of a single stroke due to the detection circuit, and it is possible to install a detection circuit with the same configuration at each block boundary. By arranging only one unit, the device configuration can be simplified.

[Brief explanation of drawings]

1 is a conceptual diagram showing the schematic configuration of the first invention, FIG. 2 is a block diagram showing the detailed configuration of an embodiment of the first invention, and FIG. 3 is a diagram of the train in the case of the example in FIG. FIG. 4 is a block diagram showing the configuration of an embodiment of the second invention, and FIG. 5 is a time chart showing the operating state of the relay as the train progresses. FIG. 6 is a block diagram showing the configuration of an embodiment of the third invention; FIG. 7 is a time chart showing the operating state of the relay; FIG. 7 is the operation of the relay as the train progresses in the example of FIG. FIG. 8 is a block diagram showing an embodiment applied when the train is traveling in the other direction. RL...Rail T...Train OA, aA + -aA!・・R1, horse,
R,,,R,2...Detection circuit section LO,,LO2o...
Block logic relay circuit section 0'l', IT', 2
'I'...Block section oso, , osa2...
Oscillator SAo −+, 5Ao-21...first selection amplifier S
A41, SA+-2, 5A2-1, SA, 2-2
...Second selection amplifier dish. -1, ■. -2...first
Relay company R, -, + rope 1-2 + MR2-1 + plate, -2...
・Second relay ITR...Block relay patent applicant Nippon Signal Co., Ltd.

Claims (1)

[Scope of Claims] tel (A) An onboard element composed of a resonant circuit is provided under the floor of the train, A constantly oscillating type oscillator whose frequency is changed when electromagnetically coupled to the onboard element, a first selection amplifier for the constant oscillation frequency of this oscillator, and a first selection using the child as a feedback circuit. A detection circuit section is provided that includes a first relay that operates with the output of the amplifier, a second selection amplifier for the resonance frequency of the onboard element provided on the train, and a second relay that operates with the output of the second selection amplifier. (・C) For each block section, when the 11th J relay of the detection circuit installed on the entrance side of the block section is restored, the contact condition of the 1st relay is restored and the train in the block section is restored. A block relay that detects the presence of a train in the block section and operates under the contact conditions of the second relay when a second relay of the detection circuit section provided on the exit side of the block section is operated to detect the absence of a train in the block section. A point-controlled blocker for a train, characterized in that it is configured with a logic relay circuit section having a blocker with a logic relay circuit section. (b) At each block boundary of the train running path, a ground element that can be electromagnetically coupled with the above-mentioned above-mentioned above-mentioned above-mentioned undercarriage is provided, and when this above-mentioned above-mentioned earth element is used as a feedback circuit and is electromagnetically coupled to the above-mentioned above-mentioned above-mentioned above-mentioned above-mentioned undercarriage. a constant oscillation type oscillator whose frequency is varied; a first selection amplifier for the constant oscillation frequency of the oscillator; and a first selection amplifier operating with the output of the first selection amplifier.
1J relay, a second selection amplifier for the resonant frequency of the onboard element provided on the train, and a second relay operated by the output of the second selection amplifier. a selection circuit section consisting of a first and second traveling direction relay that is operated according to train traveling direction conditions for each block section; In one direction of travel, the second
When the traveling direction relay is operating, in the second traveling direction, when the first relay of the detection circuit section installed on the sunrise side of the relevant block section is restored, the contact condition of the first relay is restored for one day. to detect the presence of a train in the block section, and when the second relay of the detection circuit section described in 11J, which is installed on the exit side of the block section, operates, it operates under the contact conditions of the second relay and detects the presence of the train in the block section. 1. A point-controlled block system for a train, comprising a block logic relay circuit section having a block relay for detecting the absence of a train. (3) (a) An overboard consisting of resonant circuits with different resonance frequencies is installed under the floor at the front and rear of the train; A ground element that is electromagnetically coupled, a constantly oscillating type oscillator whose frequency is changed when it is electromagnetically coupled to the onboard element, and a first oscillator for the constantly oscillating frequency of this oscillator, which uses the earth element as a feedback circuit.
a selective amplifier, a first relay that operates based on the appearance of the first selective amplifier, a second selective amplifier for the resonant frequency of the onboard element provided at the rear of the train, and a second selective amplifier. A detection circuit section consisting of a second relay operated by the output of the fault detector is installed, and (/→ For each block section, the first relay of the detection circuit section installed at the entrance side of the block section is restored. When the contact condition of the first relay is restored and the presence of a train is detected, and the second relay of the detection circuit section provided on the exit l side of the block section operates, the second relay A point-controlled block device for a train, comprising a block logic relay circuit section having a block relay that operates under contact conditions to detect the absence of a train.