Reporting device and emergency reporting system

Abstract

To improve reliability as an emergency reporting system when disconnection occurs, and easily specify a disconnection occurrence portion.SOLUTION: A reporting device 12 includes: a normally open push switch 14 having a switch terminal 1410 and a switch terminal 1420; first internal wiring 3010 and second internal wiring 3020 that are led out from the switch terminal 1410 of the normally open push switch 14; third internal wiring 3030 and fourth internal wiring 3040 that are led out from the switch terminal 1420 of the normally open press switch 14; and diodes 22, 24 as circuit devices that are connected in parallel to a wiring path passing through first internal wiring 3010 and second internal wiring 3020 and a wiring path passing through third internal wiring 3030 and fourth internal wiring 3040, and make a current flow in a predetermined one direction.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a notification device having an operation switch, and an emergency notification system having a plurality of notification devices. [Background technology]

[0002] Conventionally, fire hydrant devices are installed as emergency equipment in tunnels such as expressways and motorways. In a fire hydrant device, for example, a fire hose and valves including a fire hydrant valve are stored in a fire hydrant storage section in a housing having a fire hydrant door, and two fire extinguishers are stored in a fire extinguisher storage section in a housing having a fire extinguisher door. In addition, fire hydrant devices are generally installed at a predetermined interval, for example, 50 meters apart, along the longitudinal direction of the tunnel.

[0003] In addition, the emergency notification device that is installed integrally with the fire hydrant installation is equipped with a red indicator light, a transmitter, a pump starting device used by the fire brigade to start the fire pump, a pump starting linkage device that is linked to the operation of the fire hydrant valve, a response lamp that indicates when the transmitter is pressed, and a telephone jack for making calls between the fire hydrant installation and a disaster prevention receiving panel installed in the electrical room during maintenance, etc.

[0004] In addition, in conventional emergency equipment, a transmitter is connected to the signal wiring from a disaster prevention receiving panel, and when the transmitter is operated, a fire notification signal is sent from the transmitter to the disaster prevention receiving panel as a transmission signal, causing the disaster prevention receiving panel to output a fire alarm and, for example, display a message on an alarm display board at the entrance to a tunnel that prohibits entry to the tunnel. In conventional emergency equipment, the disaster prevention receiving panel has a function of monitoring for breaks in the signal wiring to the transmitter (Patent Document 1).

[0005] However, in conventional emergency equipment, the signal wiring from the disaster prevention receiving panel branches off midway to lead out multiple connection wirings that are then connected to the transmitter, and there is a problem in that the connection wirings are not monitored. For example, the wiring to the transmitter of the emergency notification device that is integrated with the fire hydrant is conducted via a terminal block provided inside the housing of the fire hydrant, and although the signal wiring from the disaster prevention receiving panel to the terminal block can be monitored for disconnection, the internal wiring (connection wiring) from the terminal block to the transmitter cannot be monitored for disconnection.

[0006] To solve this problem, a transmitter is equipped with a push switch (operation switch) and a terminal block having multiple terminals, and two internal wires are led out from one switch terminal of the push switch and connected to two terminals of the terminal block, and the other two internal wires are led out from the other switch terminal and connected to the other two terminals of the terminal block.A transmitting device (notification device) is applied to the transmitter, and the signal wiring from the disaster prevention receiving panel is connected to the terminal block to connect the signal wiring and the internal wiring in series, making it possible to monitor not only the signal wiring from the disaster prevention receiving panel, but also the internal wiring from the terminal block to the push switch (Patent Document 2). [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2018-073023 A [Patent Document 2] JP 2022-087053 A Summary of the Invention [Problem to be solved by the invention]

[0008] However, although Patent Document 2 makes it possible to monitor for disconnections including the internal wiring by providing a terminating resistor in the transmitting equipment (reporting device) at the final stage, the following problems remain with this wiring configuration.

[0009] The first problem is that although it can detect a break, it cannot pinpoint the exact location of the break. Therefore, to confirm the location of the break, workers must actually go to the site and check all of the wiring that is being monitored, which takes time to restore the break. In addition, the larger the emergency notification system, the more wiring that needs to be checked, making the restoration work more difficult and time-consuming.

[0010] The second issue is that when a line break occurs, the reporting device located downstream of the break will stop functioning, making the system unreliable as an emergency reporting system when a line break occurs. There is a possibility that the line break may not be restored immediately, so it is desirable for as many reporting devices to maintain their function as possible even when a line break occurs.

[0011] An object of the present invention is to provide a reporting device and an emergency reporting system which improve the reliability of the emergency reporting system when a wire breakage occurs and which makes it easy to identify the location of the wire breakage. [Means for solving the problem]

[0012] (Notification device 1) The present invention provides a switch having a first switch terminal and a second switch terminal, the switch shorting the first switch terminal and the second switch terminal by a predetermined operation; a first internal wiring and a second internal wiring led out from a first switch terminal of the operation switch; a third internal wiring and a fourth internal wiring led out from the second switch terminal of the operation switch; A reporting device comprising: A signal line can be formed by directly or indirectly connecting the first internal wiring and the second internal wiring to one of a pair of external signal wirings, and directly or indirectly connecting the third internal wiring and the fourth internal wiring to the other of the pair of external signal wirings, in which the pair of signal wirings and the first internal wiring to the fourth internal wirings are connected together; The present invention is characterized in that, when a signal line is formed, a circuit device is provided which is connected in parallel to a wiring path passing through the first internal wiring and the second internal wiring and a wiring path passing through the third internal wiring and the fourth internal wiring, and which causes a current to flow in a predetermined direction.

[0013] (Detection device that detects when current flows through a circuit device) A detection device is provided for detecting the flow of current through the circuit arrangement.

[0014] (Notification device 2) In another embodiment of the present invention, there is provided a switch having a first switch terminal and a second switch terminal, the switch shorting the first switch terminal and the second switch terminal by a predetermined operation; a first internal wiring and a second internal wiring led out from a first switch terminal of the operation switch; a third internal wiring and a fourth internal wiring led out from the second switch terminal of the operation switch; A reporting device comprising: A signal line can be formed by directly or indirectly connecting the first internal wiring and the second internal wiring to one of a pair of external signal wirings, and directly or indirectly connecting the third internal wiring and the fourth internal wiring to the other of the pair of external signal wirings, in which the pair of signal wirings and the first internal wiring to the fourth internal wirings are connected together; a first circuit device that is connected to the first internal wiring so as to be located between the first internal wiring and one of the signal wirings when a signal line is formed, or is connected to the third internal wiring so as to be located between the third internal wiring and the other of the signal wirings, and that allows a current to flow in one predetermined direction; a second circuit device that is connected in parallel to a wiring path passing through the first internal wiring, the second internal wiring, and the first circuit device, and to a wiring path passing through the third internal wiring, the fourth internal wiring, and the first circuit device when a signal line is formed, and that passes a current in one direction opposite to that of the first circuit device; The present invention is characterized in that:

[0015] (Emergency notification system 1 equipped with notification device 1) In another embodiment of the present invention, there is provided an emergency notification system including a plurality of the above-described notification devices 1, A line monitoring unit is provided for monitoring the state of a signal line, One of the pair of signal wirings is connected in sequence to the first internal wiring and the second internal wiring, excluding either the first internal wiring or the second internal wiring, of the notification device at the final stage from the line monitoring unit; the other of the pair of signal wirings is connected in sequence to the third internal wiring and the fourth internal wiring, excluding either the third internal wiring or the fourth internal wiring, of the notification device at the final stage from the line monitoring unit; By connecting either the first internal wiring or the second internal wiring of the notification device of the final stage that is removed in connection with one of the signal wirings, and either the third internal wiring or the fourth internal wiring of the notification device of the final stage that is removed in connection with the other of the signal wirings, forming a signal line by connecting the pair of signal wirings and the first internal wiring to the fourth internal wiring; The present invention is characterized in that the state of an emergency call line connected to the signal line can be monitored by a line monitoring unit.

[0016] (Disconnection determination for emergency notification system 1) The line monitoring unit: Under normal circumstances, the circuit device monitors the state of the signal line by passing a line current in a direction that does not allow current to flow. When a disconnection is determined as the state of the signal line, the circuit device switches the line current in a direction in which the current flows, After switching the direction of the line current flow, if it is detected that the line current is flowing, it is determined that there is a break in any of the first to fourth internal wirings, and if it is detected that no line current is flowing, it is determined that there is a break in the signal wiring.

[0017] (Notification of detection by detection device) A detection device for detecting the flow of a current through the circuit device is provided in the notification device, The detection device notifies the notification device of the detection in a visually recognizable manner from outside the notification device.

[0018] (Emergency notification system 2 equipped with notification device 2) In another embodiment of the present invention, there is provided an emergency notification system including a plurality of the above-described notification devices 2, A line monitoring unit is provided for monitoring the state of a signal line, one of the pair of signal wirings is connected in sequence to the first circuit device and the second internal wiring connected to the first internal wiring except for either the first circuit device or the second internal wiring connected to the first internal wiring of the notification device at the final stage from the line monitoring unit; the other of the pair of signal wirings is sequentially connected to the first circuit device and the fourth internal wiring connected to the third internal wiring except for either the first circuit device or the fourth internal wiring connected to the third internal wiring of the notification device at the final stage from the line monitoring unit; By connecting either the first circuit device or the second internal wiring connected to the first internal wiring of the notification device of the final stage that is removed in the connection with one of the signal wirings, and either the first circuit device or the fourth internal wiring connected to the third internal wiring of the notification device of the final stage that is removed in the connection with the other of the signal wirings, forming a signal line by connecting the pair of signal wirings and the first internal wiring to the fourth internal wiring; The present invention is characterized in that the state of an emergency call line connected to the signal line can be monitored by a line monitoring unit.

[0019] (Disconnection determination of emergency notification system 2) The line monitoring unit: Under normal circumstances, the first circuit device passes current and the second circuit device passes current in a direction that does not allow current to flow, thereby monitoring the state of the signal line; When a disconnection is determined as the state of the signal line, the first circuit device switches to a direction in which the line current flows so that the first circuit device does not pass current and the second circuit device passes current; After switching the direction of the line current flow, if it is detected that the line current is flowing, it is determined that there is a break in any of the first to fourth internal wirings, and if it is detected that no line current is flowing, it is determined that there is a break in the signal wiring.

[0020] (Monitoring disconnection of the wiring path via the second circuit device) The line monitoring unit switches the line current flow so that the first circuit device does not flow current and the second circuit device flows current at a predetermined timing under normal circumstances, and monitors for breaks in the wiring path passing through the second circuit device.

[0021] (Emergency equipment) This is applied to emergency equipment in which a reporting device installed in a fire hydrant device or a manual reporting device is connected to a disaster prevention receiving panel that functions as a host device that monitors the status of the emergency reporting line, The notification device disposed in the fire hydrant device or the manual notification device includes a transmitter, a pump start device, and a pump start interlock device. Effect of the Invention

[0022] (Effects of Notification Device 1 and Emergency Notification System 1) In the notification device 1 of the present invention and the emergency notification system 1 having a plurality of notification devices 1, a wiring path is formed in the signal line that passes through a circuit device that passes current in a predetermined direction, in parallel to the wiring path that passes through the first internal wiring and the second internal wiring and the wiring path that passes through the third internal wiring and the fourth internal wiring. Therefore, when no break has occurred (normally), it is possible to monitor the state of the signal line (emergency notification line) by passing line current through the first internal wiring to the fourth internal wiring without passing current through the circuit device side, and when a break occurs in any of the first internal wiring to the fourth internal wiring, it is possible to pass line current through the circuit device side without passing through the first internal wiring to the fourth internal wiring where the break has occurred. This makes it possible to maintain functions other than those of the notification device in which the break has occurred in at least the first internal wiring to the fourth internal wiring, thereby improving the reliability of the emergency notification system when a break occurs.

[0023] (The effect of a detection device that detects the flow of current through a circuit device) In addition, a detection device is provided that detects when current flows through the circuit device, and the detection device visibly notifies the detection from outside the reporting device, so that when a break occurs in any of the first internal wiring to the fourth internal wiring, the detection device detects that line current has flowed through the circuit device without passing through the first internal wiring to the fourth internal wiring in which the break has occurred, and from the detection result it is possible to easily identify the reporting device in which a break has occurred in the first internal wiring to the fourth internal wiring.

[0024] (Effect of Disconnection Detection in Emergency Notification System 1) In addition, the line monitoring unit normally monitors the state of the signal line by passing a line current in a direction in which the circuit device does not pass current, and if it determines that the state of the signal line is a break, it switches the line current to pass in the direction in which the circuit device passes current, and if it detects that line current is flowing after switching the direction in which the line current flows, it determines that there is a break in any of the first internal wiring to the fourth internal wiring, and if it detects that no line current is flowing, it determines that there is a break in the signal wiring, so that when a break is determined, it is possible to distinguish whether the break has occurred in the signal wiring or the first internal wiring to the fourth internal wiring, and it is possible to easily identify the location of the break.

[0025] (Effects of Notification Device 2 and Emergency Notification System 2) Furthermore, in the notification device 2 of the present invention and the emergency notification system 2 having a plurality of notification devices 2, a wiring path passing through the second circuit device, which passes current in a direction opposite to that of the first circuit device, is formed in the signal line in parallel to the wiring path passing through the first internal wiring, the second internal wiring, and the first circuit device which passes current in a predetermined direction, and the wiring path passing through the third internal wiring, the fourth internal wiring, and the first circuit device which passes current in a predetermined direction. Therefore, when no break has occurred, it is possible to flow a line current to the first internal wiring to the fourth internal wiring by flowing a current in the direction in which the first circuit device passes, thereby making it possible to monitor the state of the signal line (emergency notification line), and when a break occurs in any of the first internal wiring to the fourth internal wiring, it is possible to flow the line current via the second circuit device side without passing through the first internal wiring to the fourth internal wiring where the break has occurred, making it possible to maintain functions other than those of the notification device in which the break has occurred in at least the first internal wiring to the fourth internal wiring, thereby improving the reliability of the emergency notification system when a break occurs.

[0026] (Effect of emergency notification system 2 disconnection detection) In addition, the line monitoring unit normally monitors the state of the signal line by passing line current in a direction in which the first circuit device passes current and the second circuit device does not pass current, and if it determines that the state of the signal line is a break, it switches the line current to pass in a direction in which the first circuit device does not pass current and the second circuit device passes current, and after switching the direction of line current flow, if it detects that line current is flowing, it determines that there is a break in any of the first internal wiring to the fourth internal wiring, and if it detects that no line current is flowing, it determines that there is a break in the signal wiring, so that when a break is determined, it is possible to distinguish whether the break has occurred in the signal wiring or the first internal wiring to the fourth internal wiring, making it easy to identify the location of the break.

[0027] (Effect of monitoring for disconnection of wiring route via second circuit device) In addition, at a predetermined timing under normal circumstances, the line monitoring unit switches the line current to flow in a direction in which the first circuit device does not flow current and the second circuit device flows current, and monitors for breaks in the wiring path passing through the second circuit device.This makes it possible to avoid a situation in which a break occurs in the wiring path on the second circuit device side when a break occurs in any of the first to fourth internal wiring, making it impossible for line current to flow, thereby improving the reliability of the emergency notification system when a break occurs. [Brief description of the drawings]

[0028] [Figure 1] FIG. 1 is an explanatory diagram showing an overview of an emergency notification system. [Diagram 2] FIG. 1 is an explanatory diagram showing an emergency notification system according to a first embodiment. [Diagram 3] FIG. 4 is an explanatory diagram shown in a flowchart illustrating a disconnection determination process according to the first embodiment. [Figure 4] FIG. 2 is an explanatory diagram showing the emergency notification system of the first embodiment to which a voltmeter is added. [Diagram 5] FIG. 11 is an explanatory diagram showing an emergency notification system according to a second embodiment. [Figure 6] FIG. 11 is an explanatory diagram shown in a flowchart illustrating a disconnection determination process according to the second embodiment. [Figure 7] FIG. 2 is an explanatory diagram showing a fire hydrant device. [Figure 8] 1 is an explanatory diagram showing an emergency facility to which the emergency notification system of a first embodiment is applied. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0029] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a notification device and an emergency notification system according to the present invention will be described in detail with reference to the accompanying drawings. Note that the present invention is not limited to the following preferred embodiments.

[0030] [Basic Concept of the Embodiment] First, a basic concept of the embodiment will be described. The embodiment is an emergency notification system including a notification device having a first switch terminal and a second switch terminal, a first internal wiring and a second internal wiring led out from the first switch terminal of an operation switch, and a line monitoring unit monitoring the state of a signal line formed by connecting a signal wiring to the notification device, and is applied to emergency equipment, etc., in which a notification device arranged in a fire hydrant device or a manual notification device is connected to a disaster prevention receiving panel functioning as a higher-level device monitoring the state of the emergency notification line.

[0031] Here, the "reporting device" may be applied to devices, equipment, etc. equipped with operation switches such as a transmitter equipped with an emergency report switch that is pressed in the event of a fire to output a fire report signal as a transmission signal, a pump start-up device equipped with a switch that outputs a pump start signal, and a pump start-up interlocking device, and the "line monitoring unit" may be applied as one function of a disaster prevention receiving board, etc. that connects electrical equipment such as a transmitter and monitors for abnormalities such as fires. The "line monitoring unit" may also be applied to dedicated equipment, equipment, etc. that monitors the status of signal lines, rather than equipment, equipment, etc. that comprehensively monitors various abnormalities such as a disaster prevention receiving board.

[0032] In addition, the type, configuration, and structure of the "operation switch" are arbitrary, but include, for example, a normally open switch, and the "normally open switch" includes, for example, a push switch that has normally open contacts (so-called a contacts) and closes the contacts to provide electrical continuity by pressing the pressing portion that serves as the operation portion.

[0033] Furthermore, the term "switch terminal" is a concept that can essentially include the contacts of the operation switch itself, and for example, the switch terminals may be provided directly on a conductor plate having the contacts of the operation switch. Of course, inside the switch, each contact and the corresponding switch terminal may be connected by a short wire or other conductor component. Note that the operation switch may be any switch that does not normally provide electrical continuity between switch terminals (between one switch terminal and the other) but provides electrical continuity between the switch terminals when a specific operation is performed, and is not limited to a push switch, and various types of switches, such as a slide switch, may be used. Furthermore, various switch types, such as a locking type and a non-locking type, may be used.

[0034] The reporting device 1 is characterized in that it is possible to form a signal circuit that connects the pair of signal wirings and the first to fourth internal wirings together by directly or indirectly connecting the first internal wiring and the second internal wiring to one of a pair of external signal wirings and directly or indirectly connecting the third internal wiring and the fourth internal wiring to the other of the pair of external signal wirings, and that when the signal circuit is formed, a circuit device is provided that is connected in parallel to the wiring path that passes through the first internal wiring and the second internal wiring and the wiring path that passes through the third internal wiring and the fourth internal wiring, and that causes a current to flow in a predetermined direction.

[0035] In addition, in an emergency notification system having a plurality of notification devices 1, one of a pair of signal wirings is connected in sequence from a line monitoring unit to the first internal wiring and the second internal wiring of the notification device in the final stage, excluding either the first internal wiring or the second internal wiring, and the other of the pair of signal wirings is connected in sequence to the third internal wiring and the fourth internal wiring of the notification device in the final stage, excluding either the third internal wiring or the fourth internal wiring, and either the first internal wiring or the second internal wiring of the notification device in the final stage that was removed in the connection with one of the signal wirings is connected to either the third internal wiring or the fourth internal wiring of the notification device in the final stage that was removed in the connection with the other signal wiring, thereby forming a signal circuit that connects the pair of signal wirings and the first internal wiring to the fourth internal wiring, and making it possible to monitor the status of the emergency notification circuit connected to the signal circuit monitoring unit.

[0036] Here, the "signal wiring" refers to wiring that is directly or indirectly connected from the outside of the notification device to the first internal wiring to the fourth internal wiring of the notification device, and in the case of an emergency notification system, it is drawn out from the line monitoring unit and led out from the line monitoring unit to sequentially connect the notification devices. Here, "the signal wiring is directly connected" literally means that the signal wiring is directly connected to the first internal wiring to the fourth internal wiring, and "the signal wiring is indirectly connected" means that the signal wiring is connected via a connection terminal of a terminal block provided in the notification device or other wiring. The terminal block (terminal box provided with a terminal block) may be provided inside the notification device or outside it.

[0037] Then, the corresponding "signal wiring" and the "internal wiring" of the notification device are sequentially connected, the pair of signal wirings and the first to fourth internal wirings are joined together, and the circuit device is connected in parallel to the wiring path via the first and second internal wirings and the wiring path via the third and fourth internal wirings, which is defined as a "signal line," and the line monitoring unit monitors the state of the "signal line." The emergency notification system also monitors the state of the "emergency notification line," which is a signal line connected to the line monitoring unit. In other words, the "signal line" refers to a "circuit" that includes an operating switch and a circuit device, and the "emergency notification line" refers to a "circuit" that further includes a line monitoring unit for the signal line.

[0038] In addition, the "line status" monitored by the line monitoring unit and the emergency notification system includes the overall status of the wiring that forms the signal line or emergency notification line and the operating status of the inserted operating switch, and is a concept that can include, for example, the overall status of the wiring, such as broken wiring, poor conductivity due to poor contact at the connection points, poor insulation due to corrosion and deterioration, and short circuits, and the "line status" is monitored, for example, based on the line current flowing in the line (line-to-line resistance of the line).

[0039] In addition, when the reporting devices are connected to the line monitoring unit in sequence, the one that is closest to the line monitoring unit in the wiring connection is called the "first stage," and the reporting device that is the furthest is called the "last stage." When comparing positions, if it is located on the line monitoring unit side, it is called the "upstream side," and if it is located on the side of the reporting device in the last stage, it is called the "downstream side." These terms are also applied to the connection terminals of the terminal block equipped on the reporting device as well as the reporting devices.

[0040] In addition, although "No. 0" is attached to the switch terminals, internal wiring, etc., this is merely added for the purpose of distinction, and the addition of "No. 0" does not limit the switch terminals, wiring, etc. For example, in a reporting device, a first internal wiring and a second internal wiring are led out from a first switch terminal of a push switch, and a third internal wiring and a fourth internal wiring are led out from the second switch terminal, this includes all inventions in which two different wirings are led out from any switch terminal of a push switch, and two different wirings are led out from a switch terminal different from that switch terminal, and the invention is not limited by the term "No. 0".

[0041] In addition, the term "circuit device" refers to a device that allows current to flow in one specific direction, i.e., does not allow current to flow in the opposite direction. The configuration for achieving this function is arbitrary, but includes, for example, a circuit that uses a diode that has the property of only allowing current to flow in a specific direction.

[0042] In the emergency notification system having multiple notification devices 1, the line monitoring unit monitors the state of the signal line by first passing a line current in a direction in which the circuit device does not pass current under normal circumstances. In other words, under normal circumstances, no line current flows through the circuit device, and line current flows through the signal wiring and the first to fourth internal wiring, which are connected in one line.

[0043] Next, when the line monitoring unit determines that the state of the signal line is a break, it switches the line current to flow in the direction in which the circuit device flows current, and after switching the direction of line current flow, if it detects that line current is flowing, it determines that there is a break in any of the first internal wiring to the fourth internal wiring, and if it detects that no line current is flowing, it determines that there is a break in the signal wiring.

[0044] This utilizes the fact that when a break occurs, the line current stops flowing, but if the break occurs in any of the first through fourth internal wiring, there is a wiring path that passes through the circuit device in parallel to the point where the break occurs, so by reversing the flow of the line current in the direction in which the circuit device flows, it is possible to cause the line current to flow again through the circuit device. On the other hand, if the break occurs in the signal wiring, there is no wiring path that bypasses the point where the break occurs, so even if the flow of the line current is reversed, the line current will not flow again.

[0045] Furthermore, when the break occurs in any of the first internal wiring to the fourth internal wiring, the only circuit device through which line current flows is the circuit device in which the parallel wiring path (the first internal wiring to the fourth internal wiring) is broken. Therefore, by providing each of the notification devices with a detection device that detects that current has flowed through the circuit device, the detection device can be used to easily identify the notification device in which a break has occurred in the first internal wiring to the fourth internal wiring.

[0046] In addition, the "detection device" may be of any configuration as long as it can detect that a current has flowed through the circuit device, and includes, for example, a device that provides an ammeter in series with the circuit device to detect the current itself, or, if a diode is used in the circuit device, a voltmeter that is provided in parallel with the circuit device to detect the voltage drop when a current flows through the diode and detects the change caused by the current flowing.

[0047] Furthermore, the "detection device" may be configured to notify the detection result (that a current has flowed through the circuit device) in a manner that is visible from outside the reporting device, so that the location of the disconnection can be more easily identified.

[0048] In another embodiment, the reporting device 2 is capable of forming a signal line connecting the pair of signal wirings and the first to fourth internal wirings together by directly or indirectly connecting the first internal wiring and the second internal wiring to one of a pair of external signal wirings and directly or indirectly connecting the third internal wiring and the fourth internal wiring to the other of the pair of external signal wirings, and is characterized in that it is provided with a first circuit device that is connected to the first internal wiring so as to be located between the first internal wiring and one of the signal wirings when the signal line is formed, or is connected to the third internal wiring so as to be located between the third internal wiring and the other of the signal wirings, and passes a current in a predetermined direction, and a second circuit device that is connected in parallel to the wiring path that passes through the first internal wiring, the second internal wiring, and the first circuit device, and the wiring path that passes through the third internal wiring, the fourth internal wiring, and the first circuit device when the signal line is formed, and passes a current in the opposite direction to the first circuit device.

[0049] In addition, in an emergency notification system having a plurality of notification devices 2, one of a pair of signal wirings is connected in sequence from the line monitoring unit to the first internal wiring and the second internal wiring of the notification device in the final stage, excluding either the first internal wiring or the second internal wiring, and the other of the pair of signal wirings is connected in sequence to the third internal wiring and the fourth internal wiring of the notification device in the final stage, excluding either the third internal wiring or the fourth internal wiring, and either the first internal wiring or the second internal wiring of the notification device in the final stage that was removed in the connection with one of the signal wirings is connected to either the third internal wiring or the fourth internal wiring of the notification device in the final stage that was removed in the connection with the other signal wiring, thereby forming a signal circuit that connects the pair of signal wirings and the first internal wiring to the fourth internal wiring, and making it possible to monitor the status of the emergency notification circuit connected to the signal circuit monitoring unit.

[0050] With regard to the notification device 2 and its emergency notification system, the meanings of the terms explained with respect to the notification device 1 and its emergency notification system are basically the same; however, with regard to the notification device 2 and its emergency notification system, the "signal line" is a connection that connects a pair of signal wiring, the first internal wiring to the fourth internal wiring, and the first circuit device, and the second circuit device is connected in parallel to the wiring path that passes through the first internal wiring, the second internal wiring, and the first circuit device, and the wiring path that passes through the third internal wiring, the fourth internal wiring, and the first circuit device.

[0051] In the emergency notification system having a plurality of notification devices 2, the line monitoring unit monitors the state of the signal line by first flowing a line current in a direction in which the first circuit device flows current and the second circuit device does not flow current under normal circumstances. In other words, under normal circumstances, no line current flows through the second circuit device, and line current flows through the pair of signal wirings, the first internal wiring to the fourth internal wiring, and the first circuit device, which are all connected together.

[0052] Next, when the line monitoring unit determines that the state of the signal line is a break, it switches the line current to flow in a direction in which the first circuit device does not flow current and the second circuit device flows current, and after switching the direction of line current flow, if it detects that line current is flowing, it determines that there is a break in any of the first internal wiring to the fourth internal wiring, and if it detects that no line current is flowing, it determines that there is a break in the signal wiring.

[0053] This utilizes the fact that when a break occurs, the line current stops flowing; however, if the break occurs in any of the first through fourth internal wiring, there is a wiring path that passes through the second circuit device in parallel to the wiring path in which the break occurs, and therefore, by reversing the flow of the line current in the direction in which the second circuit device passes, it is possible to cause the line current to flow again through the second circuit device. On the other hand, if the break occurs in the signal wiring, there is no wiring path that bypasses the location of the break, and therefore the line current will not flow again even if the flow of the line current is reversed.

[0054] Furthermore, since the first circuit device is present in the wiring path through which the line current flows under normal circumstances, when the direction in which the line current flows is reversed under normal circumstances, it is possible to pass the line current through the wiring path that passes through the signal wiring and the second circuit device without passing the line current through the first internal wiring to the fourth internal wiring and the first circuit device. Therefore, at a predetermined timing under normal circumstances, the line monitoring unit may switch the line current so that the first circuit device does not pass current and the second circuit device passes current, thereby monitoring for breaks in the wiring path that passes through the second circuit device.

[0055] Specific embodiments will be described below. In the specific embodiments shown below, the "operation switch" is a "normally open push switch (a-contact switch) of a normally open type," the "line monitoring unit" is "provided as one of the functions of a higher-level device," the wiring from the higher-level device to the terminal block of a notification device and the wiring from the terminal block of a notification device to the terminal block of another notification device are "signal wiring," the wiring from the terminal block to the switch terminal of the normally open push switch is "internal wiring (first internal wiring to fourth internal wiring)," the "circuit device" is a "circuit having a diode," the "detection device" is a "voltmeter connected in parallel to a diode," and the emergency notification system provided with notification device 1 is described as a first embodiment, and the emergency notification system provided with notification device 2 is described as a second embodiment.

[0056] [Specific details of the embodiment] The embodiment of the emergency notification system including the notification device will be described in more detail below. a. Overview of emergency reporting system equipped with reporting device b. Emergency notification system of the first embodiment b1. Configuration of the reporting device b2. Wiring configuration of emergency call lines b3. Signal line status monitoring b4. Disconnection detection process c. Modification of the first embodiment in which a diode through which a line current flows can be detected d. Emergency notification system according to the second embodiment d1. Configuration of the reporting device d2. Wiring configuration of emergency call line d3. Signal line status monitoring d4. Disconnection detection process e.Emergency equipment e1. Fire hydrant equipment e2. Emergency equipment using emergency notification system e2-1. Configuration of fire hydrant equipment where reporting device is applied e2-2. Wiring configuration for the normally open push switch equipped on the transmitter e2-3. Wiring configuration for the normally open push switch equipped with the pump starter e2-4. Wiring configuration for normally open push switch corresponding to response lamp f. Modifications of the present invention

[0057] [a. Overview of emergency notification system equipped with notification device] First, an overview of an emergency notification system equipped with a notification device will be described with reference to Fig. 1 showing an overview of the emergency notification system.

[0058] As shown in FIG. 1, in the emergency notification system, notification devices 12 are connected in sequence to a signal wiring 20 drawn from a higher-level device 10.

[0059] The notification device 12 has at least one operation switch, and when the operation switch is operated, it transmits a transmission signal to the higher-level device 10 via the signal wiring 20. The higher-level device 10 monitors the operation of the notification device 12 (operation of the operation switch), wiring breaks, etc. as the state of the emergency notification line, based on the line current flowing through the internal wiring for the operation switch of the notification device 12 and the emergency notification line including the signal wiring 20.

[0060] Here, the number of notification devices provided in the emergency notification system is arbitrary, but in Fig. 1, three notification devices 12 are provided. In order to distinguish between the notification devices 12, they are referred to as notification devices 12 (12-1), 12 (12-2), 12 (12-3) in order from the notification device 12 on the higher-level device 10 side, and when there is no need to distinguish between the notification devices, they are simply referred to as notification device 12.

[0061] In addition, in terms of wiring connection, the reporting device on the host device 10 side as viewed from the reporting device 12 itself is referred to as the "upstream reporting device," and the reporting device on the opposite side of the host device 10 is referred to as the "downstream reporting device." For example, in Fig. 1, as viewed from the reporting device 12 (12-2), the reporting device 12 (12-1) is the "upstream reporting device," and the reporting device 12 (12-3) is the "downstream reporting device."

[0062] Furthermore, among the reporting devices 12, the reporting device 12 connected to the position closest to the higher-level device 10 in terms of wiring connection is referred to as the "first-stage reporting device," and the reporting device 12 connected to the position furthest is referred to as the "last-stage reporting device." For example, in Fig. 1, the reporting device 12 (12-1) is the "first-stage reporting device," and the reporting device 12 (12-3) is the "last-stage reporting device."

[0063] The signal wiring 20 also includes high-voltage signal wiring (signal cable) intended for a commercial AC power source and low-voltage signal wiring (signal cable) intended for a specified DC voltage power source, and in the embodiment, the low-voltage signal wiring is connected to the operation switch of the reporting device 12.

[0064] [b. Emergency notification system of the first embodiment] Next, the emergency notification system of the first embodiment will be described assuming that each notification device has one normally open push switch as the operation switch.

[0065] (b1. Configuration of the reporting device) First, the configuration of the notification device will be described with reference to Fig. 2 showing the emergency notification system of the first embodiment.

[0066] The reporting device 12 includes a normally open push switch 14, a terminal block 18, and diodes 22, 24, and the reporting device 12(12-3) further includes a bypass resistor 16 that serves as a terminating resistor. Here, when distinguishing between the reporting devices 12(12-1) to 12(12-3), the normally open push switches 14 are designated as 14(14-1) to 14(14-3) for the reporting devices 12(12-1) to 12(12-3), and the same is true for the terminal block 18 and the diodes 22, 24. In FIG. 2, the reference numerals for the reporting devices 12(12-2) and 12(12-3) are basically the same as those for the reporting device 12(12-1), and therefore are shown to the minimum extent necessary.

[0067] Normally open push switch 14 is an “a-contact switch” that normally opens the switch contacts as shown in the figure and closes the switch contacts when pressed.

[0068] The terminal block 18 has multiple connection terminals that serve as connection points for the wiring. Four connection terminals 1810, 1820, 1830, and 1840 are used. In the terminal block 18 (18-3) of the notification device 12 (12-3), a bypass resistor 16 having a predetermined resistance value is connected between the connection terminals 1820 and 1840.

[0069] Diode 22 is connected between connection terminals 1810 and 1820 in a direction that does not allow current to flow from connection terminal 1810 to connection terminal 1820, but allows current to flow from connection terminal 1820 to connection terminal 1810.

[0070] Diode 24 is connected between connection terminal 1830 and connection terminal 1840 in a direction that does not allow current to flow from connection terminal 1840 to connection terminal 1830, but allows current to flow from connection terminal 1830 to connection terminal 1840.

[0071] The wiring configuration of the reporting device 12 is such that the connection terminal 1810 of the terminal block 18 is connected to the switch terminal 1410 of the normally open push switch 14 by a first internal wiring 3010, and the connection terminal 1820 of the terminal block 18 is connected by a second internal wiring 3020. Also, the connection terminal 1830 of the terminal block 18 is connected to the switch terminal 1420 of the normally open push switch 14 by a third internal wiring 3030, and the connection terminal 1840 of the terminal block 18 is connected by a fourth internal wiring 3040. Note that the first to fourth internal wirings are collectively referred to as internal wiring 30.

[0072] (b2. Wiring configuration of emergency call line) Next, the wiring configuration of the emergency call line will be explained with reference to FIG.

[0073] A signal wiring 2010, which is one of a pair of signal wirings 20, is connected between the positive terminal of the upper device 10 and the connection terminal 1810 of the terminal block 18 (18-1), between the connection terminal 1820 of the terminal block 18 (18-1) and the connection terminal 1810 of the terminal block 18 (18-2), and between the connection terminal 1820 of the terminal block 18 (18-2) and the connection terminal 1810 of the terminal block 18 (18-3).

[0074] In addition, the other signal wiring 2020 of the pair of signal wirings 20 is connected between the negative terminal of the higher-level device 10 and the connection terminal 1830 of the terminal block 18 (18-1), between the connection terminal 1840 of the terminal block 18 (18-1) and the connection terminal 1830 of the terminal block 18 (18-2), and between the connection terminal 1840 of the terminal block 18 (18-2) and the connection terminal 1830 of the terminal block 18 (18-3).

[0075] As a result, the notification devices 12 (12-1) to 12 (12-3) are sequentially connected to the line monitoring unit 1010 of the higher-level device 10, and this wiring configuration connects three normally-open push switches 14 in parallel between the positive and negative terminals of the higher-level device 10, and forms a continuous wiring path from the positive terminal of the higher-level device 10 through all the signal wiring 20, internal wiring 30 and bypass resistor 16 to the negative terminal of the higher-level device 10. The line monitoring unit 1010 monitors the status of the signal line including this wiring path, and the higher-level device 10 monitors the status of the emergency notification line to which the line monitoring unit 1010 is connected to that signal line.

[0076] (b3. Signal line status monitoring) Next, the monitoring of the state of the signal line by the line monitoring unit will be described. The state monitoring is characterized in that, when it is determined that the state of the signal line is broken, the monitoring voltage applied is reversed so that the potential of the positive terminal becomes negative with respect to the potential of the negative terminal (reference potential), and the direction of the line current flowing through the signal line is reversed and then monitored.

[0077] The line monitoring unit 1010 normally applies a monitoring voltage that makes the potential of the positive terminal positive with respect to the potential of the negative terminal (reference potential) so that the line current flows from the positive terminal to the negative terminal of the higher-level device 10. Also, since the line current flows from the positive terminal to the negative terminal under normal conditions, the line current does not flow through the diodes 22 and 24 that do not allow current to flow in that direction, but flows via the internal wiring 30.

[0078] If a break occurs in either the signal wiring 20 or the internal wiring 30, the positive terminal and the negative terminal of the upper device 10 are opened, and no line current flows through the signal line, so that the line monitoring unit 1010 determines that a break has occurred.

[0079] Then, when the line monitoring unit 1010 determines that a break has occurred, it reverses (changes) and applies a monitoring voltage such that the potential of the positive terminal is negative relative to the potential of the negative terminal (reference potential) so that line current flows from the negative terminal to the positive terminal of the upper device 10.

[0080] If the break occurs in the signal wiring 20, even if the line monitoring unit 1010 reverses the monitoring voltage, there is no path for the line current to bypass the break, and the connection between the positive and negative terminals of the upper device 10 remains open, maintaining a state in which no line current flows through the signal line.

[0081] On the other hand, if the break occurs in the internal wiring 30, for example the first internal wiring 3010 of the reporting device 12 (12-1), a line current flows between the connection terminals 1810, 1820 of the terminal block 18 (18-1) from the negative terminal to the positive terminal via the diode 22 (22-1), and the line monitoring unit 1010 again detects a line current according to the resistance value of the bypass resistor 16.

[0082] That is, when the line monitoring unit 1010 determines that there is a break, it reverses the direction of the line current flow (monitoring voltage) and monitors the line current again, and if the state where no line current flows is maintained, it determines that the break has occurred in the signal wiring 20, and if the line current is detected again, it determines that the break has occurred in the internal wiring 30, and can distinguish and determine whether the break has occurred in the signal wiring 20 or the internal wiring 30, making it possible to specify the break's location more specifically than in the conventional emergency notification system, and the higher-level device 10 can notify the break, including the fact that the break has occurred in the signal wiring 20 or the internal wiring 30. As a mode of notification, for example, a wiring diagram as shown in FIG. 2 is displayed so that the range of the break's location can be identified.

[0083] Then, when a worker or the like who has learned that a disconnection has occurred by the notification from the higher-level device 10 goes to the site, and if the location of the disconnection is in any of the signal lines 20, the worker or the like operates the notification devices 12 one by one from the upstream side to identify the location of the disconnection. If the location of the disconnection is in the signal wiring 20, the notification device 12 upstream of the location of the disconnection is not affected by the disconnection and can transmit a transmission signal to the higher-level device 10 when the normally-open push switch 14 is operated, but the notification device 12 downstream of the location of the disconnection cannot transmit a transmission signal to the higher-level device 10 even if the normally-open push switch 14 is operated. That is, it is confirmed whether the notification device 12 on the upstream side can report, and when a notification device 12 that cannot report is confirmed, it can be identified that a disconnection has occurred in the signal wiring 20 between the notification device 12 that cannot report and the notification device 12 one upstream side.

[0084] If the break occurs in the internal wiring 30, the internal wiring 30 of each notification device 12 is checked to identify the location where the break occurs.

[0085] In addition, since the direction of the line current (monitoring voltage) is reversed when a break is determined, in the event of a break in the internal wiring 30, the reporting function can be maintained for reporting devices 12 other than the reporting device 12 in which the break occurred, so that the reporting function at the time of a break can be improved compared to conventional emergency reporting systems, and the reliability of the emergency reporting system can be improved. Furthermore, even in the reporting device 12 in which a break in the internal wiring 30 has occurred, if the location of the break is the first internal wiring 3010 or the third internal wiring 3030, the reporting function can be maintained because a transmission signal can be transmitted via a route via the diodes 22, 24.

[0086] (b4. Disconnection determination process) Next, an example of a disconnection determination process for determining that the state of a signal line is a disconnection will be described with reference to a flowchart of FIG.

[0087] Under normal circumstances, the line monitoring unit 1010 monitors the state of the signal line by applying a monitoring voltage that makes the potential of the positive terminal positive relative to the potential of the negative terminal (reference potential), and when it detects that a break has occurred, causing the signal line to become open and line current to stop flowing, it determines that a break has occurred (steps S1, S2).

[0088] Next, the line monitoring unit 1010, which has determined that there is a break, continues monitoring by reversing the monitoring voltage so that the potential of the positive terminal is negative with respect to the potential of the negative terminal (reference potential) so that line current flows from the negative terminal to the positive terminal of the upper device 10 (step S3).

[0089] Next, after reversing the monitoring voltage, if the line monitoring unit 1010 detects line current again, it determines that the break has occurred in the internal wiring 30, and if the state in which no line current is detected remains, it determines that the break has occurred in the signal wiring 20, and notifies the user of the determination result (steps S4 to S7).

[0090] Then, upon receiving notification of the judgment result by the line monitoring unit 1010, a worker or the like inspects the site, and when the work to restore the disconnection is completed, a restoration operation is performed to return to the normal monitoring state, such as returning the applied monitoring voltage to a monitoring voltage that makes the potential of the positive terminal positive relative to the normal potential (reference potential) of the negative terminal (step S8), and the system returns to step S1 again to monitor the status of the signal line.

[0091] [c. Modification of the first embodiment in which a diode through which a line current flows can be detected] Next, a modified example of the first embodiment will be described, which is capable of detecting a diode through which a line current flows after the line monitoring unit reverses the monitoring voltage due to a break in the internal wiring. In this description, reference will be made to Fig. 4, which shows the emergency notification system of the first embodiment to which a voltmeter is added.

[0092] As described above, when the break occurs in the internal wiring 30, the break is identified by checking the internal wiring 30 of each notification device 12 in order, but there is a possibility that the break may be overlooked during the checking work. In addition, it is possible to find a notification device 12 that cannot report by operating the notification devices 12 in order as in the case of a break in the signal wiring 20, but in the case of a break in the first internal wiring 3010 or the third internal wiring 3030, a report can be made even in the notification device 12 in which a break occurs in the internal wiring, so there may be no notification device 12 that cannot report. Therefore, in the modified example of the first embodiment, voltmeters 23 and 25 are added as detection devices that detect the flow of line current to the diodes 22 and 24, making it possible to easily identify the notification device 12 in which a break occurs in the internal wiring 30.

[0093] 4, voltmeter 23 is connected between connection terminals 1810, 1820 so as to be in parallel with diode 22, and voltmeter 25 is connected between connection terminals 1830, 1840 so as to be in parallel with diode 24. When distinguishing between voltmeters 23, 25 for each of reporting devices 12 (12-1) to 12 (12-3), they are referred to as 23 (23-1) to 23 (23-3) and 25 (25-1) to 25 (25-3).

[0094] For example, if we consider a case in which the first internal wiring 3010 of the reporting device 12 (12-1) is broken as the internal wiring 30 breaks, after the line monitoring unit 1010 reverses the monitoring voltage, line current will flow through the diode 22 (22-1) of the reporting device 12 (12-1), but no line current will flow through the other diodes 22, 24. Therefore, only the voltmeter 23 (23-1) will detect the voltage drop caused by the line current flowing through the diode 22 (22-1) as a specified voltage.

[0095] Therefore, a worker or the like who receives a notification that the break has occurred in the internal wiring 30 can identify the notification device 12 in which a break has occurred in the internal wiring 30 by checking the voltage values ​​detected by each of the voltmeters 23, 25 provided in the notification device 12.

[0096] Here, the voltmeters 23 and 25 are not intended to precisely measure voltage values, but rather only need to be capable of detecting the voltage drop that occurs when line current flows through the diodes 22 and 24. Therefore, the voltmeters 23 and 25 do not need to be highly accurate, and inexpensive voltmeters can be used.

[0097] Furthermore, by making the voltage values ​​detected by the voltage indicators 23 and 25 visible from outside the reporting device 12, it becomes even easier for workers or the like to check the voltage values.

[0098] In addition, voltmeter 23 is provided in correspondence with diode 22 which passes a line current when the first internal wiring 3010 or the second internal wiring 3020 is broken, and voltmeter 25 is provided in correspondence with diode 24 which passes a line current when the third internal wiring 3030 or the fourth internal wiring 3040 is broken. Therefore, depending on which of voltage values ​​23, 25 is detecting the voltage, workers etc. can determine whether the break in the internal wiring 30 has occurred in the first internal wiring 3010 or the second internal wiring 3020, or the third internal wiring 3030 or the fourth internal wiring 3040.

[0099] Furthermore, since it is sufficient to detect that a line current has flowed through the diodes 22, 24, the detection device is not limited to a voltmeter, and for example, an ammeter that detects the line current itself flowing through the diodes 22, 24 may be provided in series with the diodes 22, 24. Furthermore, the diodes 22, 24 may be LEDs that emit light when a current flows, so that the circuit device also functions as a detection device. In this case, however, the line monitoring unit 1010 of the higher-level device 10 needs to pass a line current (e.g., 10 mA) that is strong enough to visually illuminate the LED when a break occurs and current flows through the diodes 22, 24.

[0100] [d. Emergency notification system of the second embodiment] Next, an emergency notification system according to a second embodiment will be described, assuming that each notification device has one normally open push switch as an operation switch, similarly to the first embodiment.

[0101] (d1. Configuration of the reporting device) First, the configuration of the notification device will be described with reference to Fig. 5 showing the emergency notification system of the second embodiment.

[0102] The notification device 12 is similar to the first embodiment in that it is equipped with a normally open push switch 14, a terminal block 18, and diodes 22, 24, and is equipped with a bypass resistor 16 that serves as a terminating resistor in the notification device 12 (12-3); however, in the second embodiment, it is further equipped with diodes 26, 28.

[0103] In addition, when the diodes 26, 28 are to be distinguished for each of the notification devices 12(12-1) to 12(12-3), they are designated as 26(26-1) to 26(26-3) and 28(28-1) to 28(28-3). In FIG. 5, the symbols for the notification devices 12(12-2) and 12(12-3) are basically the same as those for the notification device 12(12-1), so they are described to the minimum extent necessary. The normally open push switch 14 and internal wiring 30 are basically the same as those in the first embodiment, so their description is omitted.

[0104] The terminal block 18 has a plurality of connection terminals that serve as connection points for wiring, and in the second embodiment, six connection terminals 1810, 1820, 1830, 1840, 1850, and 1860 are used.

[0105] Diode 22 is connected between connection terminals 1820 and 1850 in a direction that does not allow current to flow from connection terminal 1850 to connection terminal 1820, but allows current to flow from connection terminal 1820 to connection terminal 1850.

[0106] Diode 24 is connected between connection terminal 1840 and connection terminal 1860 in a direction that does not allow current to flow from connection terminal 1840 to connection terminal 1860, but allows current to flow from connection terminal 1860 to connection terminal 1840.

[0107] Diode 26 is connected between connection terminals 1810 and 1850 in a direction that does not allow current to flow from connection terminal 1810 to connection terminal 1850, but allows current to flow from connection terminal 1850 to connection terminal 1810.

[0108] Diode 28 is connected between connection terminals 1830 and 1860 in a direction that does not allow current to flow from connection terminal 1860 to connection terminal 1830, but allows current to flow from connection terminal 1830 to connection terminal 1860.

[0109] That is, as in the first embodiment, the diodes 22, 24 are oriented so that a line current can flow when the monitoring voltage is reversed to one in which the potential of the positive terminal is negative relative to the potential of the negative terminal (reference potential) so that a line current flows from the negative terminal to the positive terminal of the upper device 10 when the line monitoring unit 1010 determines a break in the line, and the diodes 26, 28 are oriented so that a line current can flow when a normal monitoring voltage is applied in which the potential of the positive terminal is positive relative to the potential of the negative terminal (reference potential) so that a line current flows from the positive terminal to the negative terminal of the upper device 10.

[0110] (d2. Wiring configuration of emergency call lines) Next, the wiring configuration of the emergency call line will be described with reference to FIG.

[0111] Signal wiring 2010, which is one of a pair of signal wirings 20, is connected between the positive terminal of the higher-level device 10 and the connection terminal 1850 of terminal block 18 (18-1), between the connection terminal 1820 of terminal block 18 (18-1) and the connection terminal 1850 of terminal block 18 (18-2), and between the connection terminal 1820 of terminal block 18 (18-2) and the connection terminal 1850 of terminal block 18 (18-3).

[0112] In addition, the other signal wiring 2020 of the pair of signal wirings 20 is connected between the negative terminal of the higher-level device 10 and the connection terminal 1860 of the terminal block 18 (18-1), between the connection terminal 1840 of the terminal block 18 (18-1) and the connection terminal 1860 of the terminal block 18 (18-2), and between the connection terminal 1840 of the terminal block 18 (18-2) and the connection terminal 1860 of the terminal block 18 (18-3).

[0113] As a result, the notification devices 12 (12-1) to 12 (12-3) are sequentially connected to the line monitoring unit 1010 of the higher-level device 10, and this wiring configuration connects three normally-open push switches 14 in parallel between the positive and negative terminals of the higher-level device 10, and forms a continuous wiring path from the positive terminal of the higher-level device 10 through the signal wiring 20, internal wiring 30, bypass resistor 16 and diodes 26 and 28 to the negative terminal of the higher-level device 10.The line monitoring unit 1010 monitors the status of the signal line including this wiring path, and the higher-level device 10 monitors the status of the emergency notification line to which the line monitoring unit 1010 is connected to the signal line.

[0114] (d3. Signal line status monitoring) Next, the monitoring of the state of the signal line by the line monitoring unit will be described.

[0115] As in the first embodiment, under normal circumstances, the line monitoring unit 1010 applies a monitoring voltage that makes the potential of the positive terminal positive with respect to the potential of the negative terminal (reference potential) so that line current flows from the positive terminal of the upper device 10 to the negative terminal. No line current flows through diodes 22, 24, which do not allow current to flow in that direction, but the line current flows via diodes 26, 28, which allow current to flow in that direction, and internal wiring 30.

[0116] Furthermore, when the line monitoring unit 1010 determines that a break has occurred in either the signal wiring 20 or the internal wiring 30, it inverts (changes) and applies a monitoring voltage that makes the potential of the positive terminal negative relative to the potential of the negative terminal (reference potential) so that line current flows from the negative terminal to the positive terminal of the higher-level device 10, as in the first embodiment.

[0117] If the break occurs in the signal wiring 20, a state in which no line current flows through the signal line is maintained, and if the break occurs in the internal wiring 30, the line current flows from the negative terminal to the positive terminal by passing through diodes 22 and 24 without passing through diodes 26, 28 and internal wiring 30, and the line monitoring unit 1010 again detects a line current according to the resistance value of the bypass resistor 16.

[0118] For this reason, even in the second embodiment, the line monitoring unit 1010 can distinguish and determine whether the location of the break is in the signal wiring 20 or the internal wiring 30, and the higher-level device 10 can report the break, including the fact that the break has occurred in the signal wiring 20 or the internal wiring 30, making it easier to identify the location of the break than with conventional emergency notification systems.

[0119] In addition, in the event of a break in the internal wiring 30, the reporting function can be maintained for reporting devices 12 other than the reporting device 12 where the break occurred, so that the reporting function at the time of a break can be improved compared to conventional emergency reporting systems, and the reliability of the emergency reporting system can be improved. Even in the reporting device 12 where a break in the internal wiring 30 occurs, if the location of the break is the first internal wiring 3010 or the third internal wiring 3030, the reporting function can be maintained because the transmission signal can be transmitted via a route via the diodes 22, 24.

[0120] In addition, in the second embodiment, when a break occurs in the internal wiring 30 and the line monitoring unit 1010 reverses the monitoring voltage, the path of the line current that flows is common regardless of the location of the break, and the line current passes through all of the diodes 22, 24 without passing through all of the diodes 26, 28 and the internal wiring 30.

[0121] For this reason, the line monitoring unit 1010 monitors for breaks in the path that passes through all of the diodes 22, 24 without passing through all of the diodes 26, 28 and internal wiring 30 by applying a monitoring voltage that reverses (changes) the potential of the positive terminal to a negative potential with respect to the potential (reference potential) of the negative terminal so that the line current flows from the negative terminal to the positive terminal of the higher-level device 10 at a predetermined timing during normal times when no breaks have occurred, thereby preventing a situation in which the line current does not flow when a break actually occurs in the internal wiring 30 and the monitoring voltage is reversed. Note that the "predetermined timing" includes various timings, such as periodic timings, such as once a day, and timings that are triggered by human operation.

[0122] (d4. Disconnection determination process) Next, an example of a disconnection determination process for determining that the state of a signal line is a disconnection will be described with reference to a flowchart of FIG.

[0123] Under normal circumstances, the line monitoring unit 1010 monitors the state of the signal line by applying a monitoring voltage that makes the potential of the positive terminal positive relative to the potential of the negative terminal (reference potential), and at a predetermined timing, it reverses the monitoring voltage to make the potential of the positive terminal negative relative to the potential of the negative terminal (reference potential) so that line current flows from the negative terminal to the positive terminal of the higher-level device 10, thereby monitoring for breaks in the wiring path that passes through diodes 22 and 24 (steps S11, S12).

[0124] If a line current is detected after reversing the monitoring voltage, the line monitoring unit 1010 determines that the wiring path passing through the diodes 22 and 24 is normal, and again reverses the monitoring voltage to make the potential of the positive terminal positive relative to the potential of the negative terminal (reference potential), and returns to normal monitoring (steps S13, S14, S16).

[0125] Then, the line monitoring unit 1010 determines that the path via the diodes 22 and 24 is normal and returns to normal monitoring. If the line monitoring unit 1010 detects that a break has occurred, causing the signal line to be open and no line current to flow, it determines that a break has occurred (steps S17, S18).

[0126] Next, the line monitoring unit 1010, which has determined that there is a break, continues monitoring by reversing the monitoring voltage so that the potential of the positive terminal is negative with respect to the potential of the negative terminal (reference potential) so that line current flows from the negative terminal to the positive terminal of the upper device 10 (step S19).

[0127] Next, after reversing the monitoring voltage, if the line monitoring unit 1010 detects line current again, it determines that the break has occurred in the internal wiring 30, and if the state in which no line current is detected remains, it determines that the break has occurred in the signal wiring 20, and notifies the user of the determination result (steps S20 to S23).

[0128] Then, upon receiving notification of the judgment result by the line monitoring unit 1010, a worker or the like inspects the site, and when the work to restore the disconnection is completed, a restoration operation is performed to return to the normal monitoring state, such as returning the applied monitoring voltage to a monitoring voltage that makes the potential of the positive terminal positive relative to the normal potential (reference potential) of the negative terminal (step S24), and the system returns to step S11 again to monitor the status of the signal line.

[0129] Furthermore, if no line current is detected after the monitoring voltage is reversed in step S13, the line monitoring unit 1010 determines that the wiring path passing through the diodes 22 and 24 is broken, and notifies the result of the determination. In response to the notification, a worker or the like checks the site, and when the work to restore the break is completed, a restoration operation is performed to return to the normal monitoring state, such as returning the applied monitoring voltage to a monitoring voltage that makes the potential of the positive terminal positive with respect to the potential (reference potential) of the negative terminal under normal conditions, and the process returns to step S11 to monitor the state of the signal line (steps S13, S15, S23, S24).

[0130] [e. Emergency equipment] Next, we will explain emergency facilities such as tunnels to which the above-mentioned emergency notification system is applied. The emergency facilities include a disaster prevention receiving panel to which a higher-level device is applied, and a fire hydrant device equipped with a transmitter to which a notification device is applied, and the fire hydrant devices are installed at multiple locations with a predetermined interval between them.

[0131] (e1. Fire hydrant equipment) First, the fire hydrant device will be described with reference to FIG.

[0132] As shown in FIG. 7, fire hydrant device 50 has a structure divided into housing 5110, the interior of which serves as a fire hydrant storage section, and housing 5120, the interior of which serves as a fire extinguisher storage section, and decorative frames 5210, 5220 are attached to the front of housings 5110, 5120.

[0133] The door opening of decorative frame 5210 of housing 5110 is divided into upper and lower parts, and a forward-tilting fire hydrant door 54 that opens downward on a hinge is provided at the lower part of the door opening, and a maintenance door 55 that opens upward on a hinge is provided at the upper part of the door opening, and inside this is the fire hydrant storage section which stores a fire hose and valves including a fire hydrant valve.

[0134] A fire extinguisher door 56 that opens sideways to the left on a hinge is provided on the left side of the door opening of decorative frame 5220 of housing 5120, and for example, two fire extinguishers can be stored in the fire extinguisher storage section inside. In addition, a sight hole is provided on the lower side of fire extinguisher door 56, making it possible to check whether a fire extinguisher is present from the outside.

[0135] An electrical door 58 that opens sideways to the right on a hinge is provided on the right side of the door opening of the decorative frame 5220. The electrical door 58 is provided with, for example, a red indicator light 60, a transmitter 62, and a response lamp 64 as components of an emergency notification device, and a telephone jack is provided inside the housing of the electrical door 58. The red indicator light 60 is always lit, allowing the location of the fire hydrant device 50 to be known from a distance.

[0136] The transmitter 62 is equipped with a normally open push switch that is pressed in the event of a fire, and when the push button of the transmitter 62 is pressed, the switch contact of the normally open push switch closes and sends a fire notification signal (transmission signal) to the disaster prevention receiving panel, which outputs a fire alarm and also controls the interlocking of emergency equipment, such as displaying a warning sign installed at the entrance to a tunnel to prohibit entry to the tunnel. The transmitter 62 equipped with such a normally open push switch is a location to which the above-mentioned notification device 12 can be applied.

[0137] The response lamp 64 is turned on by a response signal transmitted from the disaster prevention receiving panel when the disaster prevention receiving panel receives a fire notification signal. The response lamp 64 is connected to the disaster prevention receiving panel via a normally open push switch for response lighting that is linked to the normally open push switch of the transmitter 62, and is turned on when the normally open push switch for response lighting that is linked to the closure of the normally open push switch of the transmitter 62 is closed.

[0138] The right side of the housing 5110 is a valve storage section, and a fire hose is connected to a water supply pipe drawn in from the outside via a water supply hydrant, a fire hydrant valve, and an automatic pressure adjusting valve. The fire hydrant valve is opened and closed by a fire hydrant valve opening and closing lever, and when the fire hydrant valve opening and closing lever is opened, a normally open push switch of the pump start interlocking device 67 is closed and a pump start signal (transmission signal) is sent to the disaster prevention receiving panel, and the disaster prevention receiving panel controls the start of the fire pump equipment, etc.

[0139] In addition, a pump starting device 66 used by the fire brigade is provided inside the opened maintenance door 55, and when the pump starting device 66 is operated, a normally open push switch closes and sends a pump start signal (transmission signal) to the disaster prevention receiving panel, and the disaster prevention receiving panel controls the start-up of the fire pump equipment, etc.

[0140] The normally open push switch of the pump starting device 66 and the normally open push switch of the pump starting interlocking device 67 are connected in parallel, and the disaster prevention receiving panel controls the starting of the fire pump equipment when either one of the devices is operated. The pump starting device 66 and the pump starting interlocking device 67 equipped with such normally open push switches are locations to which the above-mentioned reporting device 12 can be applied.

[0141] Terminal boxes 6810, 6820 equipped with terminal blocks are arranged on the inner rear surface of housing 5120 behind fire extinguisher door 56. A high-power signal cable (signal wiring) from the disaster prevention receiving panel is connected to the terminal block of terminal box 6810, and internal wiring for red indicator light 60 is also connected to the terminal block of terminal box 6810.

[0142] In addition, a low-voltage signal cable (signal wiring) from the disaster prevention receiving panel is connected to the terminal block of the terminal box 6820, and internal wiring to the transmitter 62, response lamp 64, telephone jack, pump start-up device 66, and pump start-up interlocking device 67 is also connected.

[0143] (e2. Emergency equipment using emergency notification system) Next, an emergency facility to which the emergency notification system is applied will be described in the case where the emergency notification system of the first embodiment is applied. In this description, reference will be made to Fig. 8 showing the emergency facility to which the emergency notification system of the first embodiment is applied.

[0144] (e2-1. Configuration of fire hydrant equipment where reporting device is applied) First, we will explain the configuration of the fire hydrant device to which the above-mentioned reporting device 12 is applied. The fire hydrant device 50 is equipped with a normally open push switch 72 of the transmitter 62, a normally open push switch 74 provided in correspondence with the response lamp 64, a normally open push switch 76 of the pump starting device 66, and a normally open push switch 77 of the pump starting interlocking device 67 as normally open push switches.

[0145] In addition, diode 78 is connected between connection terminals 9010 and 9020 of terminal block 90 in an orientation that does not allow current to flow from connection terminal 9010 to connection terminal 9020, but allows current to flow from connection terminal 9020 to connection terminal 9010, and diode 80 is connected between connection terminals 9030 and 9040 of terminal block 90 in an orientation that does not allow current to flow from connection terminal 9040 to connection terminal 9030, but allows current to flow from connection terminal 9030 to connection terminal 9040.

[0146] In addition, a diode 82 is connected between connection terminals 9050 and 9060 of the terminal block 90 in an orientation that does not allow current to flow from connection terminal 9050 to connection terminal 9060, but allows current to flow from connection terminal 9060 to connection terminal 9050, and a diode 84 is connected between connection terminals 9070 and 9080 of the terminal block 90 in an orientation that does not allow current to flow from connection terminal 9080 to connection terminal 9070, but allows current to flow from connection terminal 9070 to connection terminal 9080.

[0147] In addition, by connecting between switch terminal 7610 of normally open push switch 76 and switch terminal 7710 of normally open push switch 77, and between switch terminal 7620 of normally open push switch 76 and switch terminal 7720 of normally open push switch 77, normally open push switch 76, normally open push switch 77, and bypass resistor 86 are connected in parallel.

[0148] Moreover, the transmitter 62 is a two-circuit switch equipped with a normally open push switch 72 and a normally open push switch 74 corresponding to the response lamp 64, and the normally open push switch 74 is linked to the pushing operation of the normally open push switch 72. Moreover, the normally open push switch 76 of the pump starting device 66 and the normally open push switch 77 of the pump start-up interlocking device 67 are connected in parallel, and are configured to transmit a pump start signal when either switch is closed.

[0149] In addition, the terminal block 90 uses ten connection terminals 9000 to 9090, and in the final stage fire hydrant device 50 (50-3), a bypass resistor 86 which serves as a terminating resistor is connected between connection terminals 9020 and 9040 of the terminal block 90, and a bypass resistor 88 which serves as a terminating resistor is connected between connection terminals 9060 and 9080 of the terminal block 90.

[0150] In order to distinguish the fire hydrant devices 50, they may be called fire hydrant devices 50 (50-1), 50 (50-2), 50 (50-3) in order from the disaster prevention receiving panel 40 side, and the same applies to the normally open push switches 72, 74, 76, 77, diodes 78, 80, 82, 84, and terminal block 90 provided in each fire hydrant device. In Fig. 8, the symbols for the fire hydrant devices 50-2 and 50-3 are basically the same as those for the fire hydrant device 50-1, so they are described to the minimum extent necessary.

[0151] (e2-2. Wiring configuration for the normally open push switch equipped on the transmitter) Next, a wiring configuration for the normally open push switch provided in the transmitter will be described.

[0152] A connection terminal 9010 of the terminal block 90 is connected to a switch terminal 7210 of the normally open push switch 72 of the fire hydrant device 50 by a first internal wiring 9410, and a connection terminal 9020 of the terminal block 90 is connected by a second internal wiring 9420. In addition, a connection terminal 9030 of the terminal block 90 is connected to the switch terminal 7220 of the normally open push switch 72 by a third internal wiring 9430, and a connection terminal 9040 of the terminal block 90 is connected by a fourth internal wiring 9440.

[0153] Then, signal wiring 9210, which is one of a pair of signal wirings pulled out from the line monitoring unit 4010 of the disaster prevention receiving panel 40, is connected between the positive terminal corresponding to the normally open push switch 72 of the disaster prevention receiving panel 40 and the connection terminal 9010 of terminal block 90-1, between the connection terminal 9020 of terminal block 90-1 and the connection terminal 9010 of terminal block 90-2, and between the connection terminal 9020 of terminal block 90-2 and the connection terminal 9010 of terminal block 90-3.

[0154] In addition, the other signal wiring 9220 of the pair of signal wirings is connected between the negative terminal corresponding to the normally open push switch 72 of the disaster prevention receiving panel 40 and the connection terminal 9030 of terminal block 90-1, between the connection terminal 9040 of terminal block 90-1 and the connection terminal 9030 of terminal block 90-2, and between the connection terminal 9040 of terminal block 90-2 and the connection terminal 9030 of terminal block 90-3.

[0155] As a result, the normally open push switches 72 of the fire hydrant device 50 are sequentially connected to the line monitoring unit 4010 of the disaster prevention receiving panel 40, and the three normally open push switches 72 are connected in parallel between the positive and negative terminals of the disaster prevention receiving panel 40, and a continuous wiring path is formed from the positive terminal of the upper device 10 through all the signal wiring 9210, 9220, the first internal wiring 9410, the second internal wiring 9420, the third internal wiring 9430, the fourth internal wiring 9440 and the bypass resistor 86 to the negative terminal of the upper device 10.

[0156] The function of monitoring the status of the emergency call line for the normally open push switch 72 by the disaster prevention receiving panel 40 (the function of monitoring the status of the signal line by the line monitoring unit 4010) and its operation are basically the same as those described in the emergency call system of the first embodiment, so a description thereof will be omitted.

[0157] (e2-3. Wiring configuration for the normally open push switch equipped with the pump starter) Next, the wiring configuration for the normally open push switch of the pump starting device will be described. Note that since the normally open push switch of the pump starting interlocking device is connected in parallel to the normally open push switch of the pump starting device, the wiring configuration for the normally open push switch of the pump starting device is also the wiring configuration for the normally open push switch of the pump starting interlocking device.

[0158] A connection terminal 9050 of the terminal block 90 is connected to a switch terminal 7610 of the normally open push switch 76 of the fire hydrant device 50 by a first internal wiring 9450, and a connection terminal 9060 of the terminal block 90 is connected by a second internal wiring 9460. In addition, a connection terminal 9070 of the terminal block 90 is connected to a switch terminal 7620 of the normally open push switch 76 by a third internal wiring 9470, and a connection terminal 9080 of the terminal block 90 is connected by a fourth internal wiring 9480.

[0159] Then, signal wiring 9230, which is one of a pair of signal wirings pulled out from the line monitoring unit 4010 of the disaster prevention receiving panel 40, is connected between the positive terminal corresponding to the normally open push switches 76, 77 of the disaster prevention receiving panel 40 and the connection terminal 9050 of terminal block 90-1, between the connection terminal 9060 of terminal block 90-1 and the connection terminal 9050 of terminal block 90-2, and between the connection terminal 9060 of terminal block 90-2 and the connection terminal 9050 of terminal block 90-3.

[0160] In addition, the other signal wiring 9240 of the pair of signal wirings is connected between the negative terminal corresponding to the normally open push switches 76, 77 of the disaster prevention receiving panel 40 and the connection terminal 9070 of terminal block 90-1, between the connection terminal 9080 of terminal block 90-1 and the connection terminal 9070 of terminal block 90-2, and between the connection terminal 9080 of terminal block 90-2 and the connection terminal 9070 of terminal block 90-3.

[0161] As a result, the normally open push switch 76 and the normally open push switch 77 of the fire hydrant device 50 are sequentially connected to the line monitoring unit 4010 of the disaster prevention receiving panel 40, and the three normally open push switches 76 and the three normally open push switches 77 are connected in parallel between the positive terminal corresponding to the normally open push switches 76, 77 of the disaster prevention receiving panel 40 and the negative terminal, and a continuous wiring path is formed from the positive terminal of the upper device 10 through all the signal wiring 9230, 9240, the first internal wiring 9450, the second internal wiring 9460, the third internal wiring 9470, the fourth internal wiring 9480 and the bypass resistor 88 to the negative terminal of the upper device 10.

[0162] The emergency call line status monitoring function (signal line status monitoring function by line monitoring unit 4010) for the normally open push switch 76 and the normally open push switch 77 by the disaster prevention receiving panel 40 and its operation are basically the same as those described in the emergency call system of the first embodiment, so a description thereof will be omitted.

[0163] (e2-4. Wiring configuration for normally open push switch corresponding to response lamp) The wiring configuration for the normally open push switch corresponding to the response lamp will be described.

[0164] The connection terminal 9000 of the terminal block 90 is connected to the switch terminal 7410 of the normally open push switch 74 of the fire hydrant device 50 via internal wiring 9400, and the connection terminal 9090 of the terminal block 90 is connected to the switch terminal 7420 via internal wiring 9490 via the response lamp 64.

[0165] Then, signal wiring 9250, which is one of the pair of signal wirings pulled out from the disaster prevention receiving panel 40, is connected between the positive terminal corresponding to the normally open push switch 74 of the disaster prevention receiving panel 40 and the connection terminal 9000 of terminal block 90-1, between the connection terminal 9000 of terminal block 90-1 and the connection terminal 9000 of terminal block 90-2, and between the connection terminal 9000 of terminal block 90-2 and the connection terminal 9000 of terminal block 90-3.

[0166] In addition, the other signal wiring 9260 of the pair of signal wirings is connected between the negative terminal corresponding to the normally open push switch 74 of the disaster prevention receiving panel 40 and the connection terminal 9090 of terminal block 90-1, between the connection terminal 9090 of terminal block 90-1 and the connection terminal 9090 of terminal block 90-2, and between the connection terminal 9090 of terminal block 90-2 and the connection terminal 9090 of terminal block 90-3.

[0167] As a result, the normally open push switches 74 of the fire hydrant device 50 are sequentially connected to the line monitoring unit 4010 of the disaster prevention receiving panel 40, and a wiring path is formed in which three normally open push switches 74 are connected in parallel between the positive terminal corresponding to the normally open push switches 74 of the disaster prevention receiving panel 40 and the negative terminal.

[0168] Incidentally, when the emergency receiving panel 40 monitors the state of the emergency call line for the normally open push switch 74, monitoring for disconnection is not performed.

[0169] [f. Modifications of the present invention] Modifications of the notification device and emergency notification system according to the present invention will now be described In addition to the above-described embodiment, the notification device and emergency notification system according to the present invention include the following modifications.

[0170] (Emergency reporting system) In the above embodiment, the case where the emergency notification system is applied to emergency facilities such as tunnels is given as an example, but the notification device and the emergency notification system may be applied to any device or facility, and for example, the notification device 12 of the present application may be applied to a manual notification device connected to a disaster prevention receiving panel. The manual notification device is equipped with a transmitter, and by configuring wiring in the same way for the push switch of the transmitter, it is possible to monitor the status of the emergency notification line including the internal wiring.

[0171] (Number of push switches installed in the notification device and connection terminals on the terminal block used) The number of push switches provided in the notification device shown in the above embodiment and the number of connection terminals of the terminal block used corresponding to the number of push switches are merely examples and are not limited to these. An appropriate notification device can be configured corresponding to the number of push switches, and the notification device can be connected to signal wiring from a higher-level device to form an emergency notification system, making it possible to monitor the status of the emergency notification line including the internal wiring.

[0172] (Monitoring wiring deterioration) The higher-level device 10 may also determine the deterioration of the wiring as the state of the emergency call line. For example, insulation deterioration of the wiring may be detected when the line current exceeds a predetermined value, and a sign of a disconnection of the wiring may be detected when the line current falls below a predetermined value.

[0173] (others) Furthermore, the present invention includes appropriate modifications that do not impair the objects and advantages of the present invention, and is not limited to the numerical values ​​shown in the above embodiment. [Explanation of symbols]

[0174] 10: Upper device 1010: Line monitoring unit 12(12-1~12-3): Notification device 14 (14-1 to 14-3), 72 (72-1 to 72-3), 74 (74-1 to 74-3), 76 (76-1 to 76-3), 77 (77-1 to 77-3): Normally open push switch 1410, 1420, 7210, 7220, 7410, 7420, 7610, 7620, 7710, 7720: Switch terminal 16, 86, 88: Bypass resistors 18(18-1~18-3), 90(90-1~90-3):Terminal block 1810~1840, 9000~9090: Connection terminal 20, 2010, 2020, 9210~9260: Signal wiring 22 (22-1 to 22-3), 24 (24-1 to 24-3), 26 (26-1 to 26-3), 28 (28-1 to 28-3), 78 (78-1 to 78-3), 80 (80-1 to 80-3), 82 (82-1 to 82-3), 84 (84-1 to 84-3): Diode 23(23-1~22-3), 25(25-1~25-3): Voltmeter 30, 9400, 9490: Internal wiring 3010, 9410, 9450: 1st internal wiring 3020, 9420, 9460: 2nd internal wiring 3030, 9430, 9470: 3rd internal wiring 3040, 9440, 9480: 4th internal wiring 40: Disaster prevention receiving panel 4010: Line monitoring unit 50(50-1~50-3): Fire hydrant equipment 5110, 5120: Housing 5210, 5220: Decorative frame 54: Fire hydrant door 55: Maintenance door 56: Fire extinguisher door 58: Electric door 60: Red indicator light 62: Transmitter 64: Answer lamp 66: Pump starting device 67: Pump start interlocking device 6810, 6820: Terminal box

Claims

1. an operation switch having a first switch terminal and a second switch terminal, the operation switch shorting the first switch terminal and the second switch terminal by a predetermined operation; a first internal wiring and a second internal wiring led out from the first switch terminal of the operation switch; a third internal wiring and a fourth internal wiring led out from the second switch terminal of the operation switch; A reporting device comprising: a signal line in which the pair of signal wirings and the first internal wiring to the fourth internal wiring are connected together by directly or indirectly connecting the first internal wiring and the second internal wiring to one of a pair of external signal wirings and directly or indirectly connecting the third internal wiring and the fourth internal wiring to the other of the pair of external signal wirings; a circuit device that is connected in parallel to a wiring path passing through the first internal wiring and the second internal wiring and a wiring path passing through the third internal wiring and the fourth internal wiring when the signal line is formed, and that causes a current to flow in a predetermined direction.

2. The notification device according to claim 1, A reporting device further comprising a detection device for detecting the flow of a current through the circuit device.

3. an operation switch having a first switch terminal and a second switch terminal, the operation switch shorting the first switch terminal and the second switch terminal by a predetermined operation; a first internal wiring and a second internal wiring led out from the first switch terminal of the operation switch; a third internal wiring and a fourth internal wiring led out from the second switch terminal of the operation switch; A reporting device comprising: a signal line in which the pair of signal wirings and the first internal wiring to the fourth internal wiring are connected together by directly or indirectly connecting the first internal wiring and the second internal wiring to one of a pair of external signal wirings and directly or indirectly connecting the third internal wiring and the fourth internal wiring to the other of the pair of external signal wirings; a first circuit device that is connected to the first internal wiring so as to be located between the first internal wiring and one of the signal wirings when the signal line is formed, or that is connected to the third internal wiring so as to be located between the third internal wiring and the other of the signal wirings, and that allows a current to flow in one predetermined direction; a second circuit device that is connected in parallel to a wiring path passing through the first internal wiring, the second internal wiring, and the first circuit device, and a wiring path passing through the third internal wiring, the fourth internal wiring, and the first circuit device when the signal line is formed, and that passes a current in one direction opposite to that of the first circuit device; A reporting device comprising:

4. An emergency notification system including a plurality of notification devices according to claim 1, a line monitoring unit for monitoring a state of the signal line, one of the pair of signal wirings is connected in sequence to a first internal wiring and a second internal wiring, excluding either the first internal wiring or the second internal wiring, of a notification device at a final stage from the line monitoring unit; the other of the pair of signal wirings is sequentially connected to a third internal wiring and a fourth internal wiring, excluding either the third internal wiring or the fourth internal wiring, of a notification device at a final stage from the line monitoring unit; By connecting either the first internal wiring or the second internal wiring of the notification device of the final stage, which is removed in connection with one of the signal wirings, to either the third internal wiring or the fourth internal wiring of the notification device of the final stage, which is removed in connection with the other of the signal wirings, forming a signal line by connecting the pair of signal wirings and the first internal wiring to the fourth internal wiring; An emergency call system characterized in that the state of an emergency call line connected to said signal line by said line monitoring unit can be monitored.

5. 5. The emergency notification system according to claim 4, The line monitoring unit Under normal circumstances, the circuit device flows a line current in a direction that does not allow current to flow, and monitors the state of the signal line; when determining that the state of the signal line is a disconnection, switching the direction in which the circuit device flows a current so that the line current flows; This emergency notification system is characterized in that, when it is detected that a line current is flowing after switching the direction of the line current, it is determined that there is a break in any of the first internal wiring to the fourth internal wiring, and when it is detected that no line current is flowing, it is determined that there is a break in the signal wiring.

6. 5. The emergency notification system according to claim 4, A detection device for detecting the flow of a current through the circuit device is provided in the notification device, The detection device is configured to visually notify the detection result from outside the notification device.

7. An emergency notification system including a plurality of notification devices according to claim 3, a line monitoring unit for monitoring a state of the signal line, one of the pair of signal wirings is sequentially connected to a first circuit device and a second internal wiring connected to a first internal wiring, except for either a first circuit device or a second internal wiring connected to a first internal wiring of a notification device at a final stage from the line monitoring unit; the other of the pair of signal wirings is sequentially connected to a first circuit device and a fourth internal wiring connected to a third internal wiring from the line monitoring unit, except for either a first circuit device or a fourth internal wiring connected to a third internal wiring of a notification device at a final stage; By connecting either the first circuit device or the second internal wiring connected to the first internal wiring of the notification device of the final stage that is removed in the connection with one of the signal wirings, and either the first circuit device or the fourth internal wiring connected to the third internal wiring of the notification device of the final stage that is removed in the connection with the other of the signal wirings, forming a signal line by connecting the pair of signal wirings and the first internal wiring to the fourth internal wiring; An emergency call system characterized in that the state of an emergency call line connected to said signal line by said line monitoring unit can be monitored.

8. 7. The emergency notification system according to claim 6, The line monitoring unit In a normal state, the first circuit device passes a current and the second circuit device passes a line current in a direction in which the current does not pass, thereby monitoring the state of the signal line; when determining that the state of the signal line is a disconnection, switching the line current to flow in a direction in which the first circuit device does not pass a current and the second circuit device passes a current; This emergency notification system is characterized in that, when it is detected that a line current is flowing after switching the direction of the line current, it is determined that there is a break in any of the first internal wiring to the fourth internal wiring, and when it is detected that no line current is flowing, it is determined that there is a break in the signal wiring.

9. 9. The emergency notification system according to claim 8, The emergency notification system is characterized in that the line monitoring unit switches the line current to flow in a direction in which the first circuit device does not flow current and the second circuit device flows current at a predetermined timing under normal conditions, thereby monitoring for breaks in the wiring path passing through the second circuit device.

10. The emergency notification system according to any one of claims 4 to 9, The present invention is applied to an emergency facility in which a reporting device disposed in a fire hydrant device or a manual reporting device is connected to a disaster prevention receiving panel that functions as a host device that monitors the status of the emergency reporting line, An emergency notification system, characterized in that the notification device arranged in the fire hydrant device or the manual notification device includes a transmitter, a pump start-up device, and a pump start-up interlocking device.

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