Fire hydrant device

Abstract

To provide a fire hydrant device capable of improving the visibility from a side face direction of a display device indicating an installation location while ensuring passage through a monitoring staff passage.SOLUTION: There is provided a fire hydrant device 10 in which a housing in which a predetermined fire hydrant instrument is accommodated is installed in proximity or in contact with a tunnel wall surface at a predetermined height above the road surface of a monitoring staff passage provided along the wall surface of a tunnel that includes a roadway. A red indicator lamp 34 that performs read indication indicating an installation location on the upper side of the front surface of the housing near a left side surface 52 opposite to the vehicle traveling direction is provided on a slave door 32 which opens laterally. Since the slave door 32 is closed during the normal time, the red indicator lamp 34 faces forward, thereby ensuring visibility from the housing front face direction. When a transmitter 22 is operated in the event of a fire, a closing state is released, the slave door 32 opens laterally, and the red indicator lamp 34 faces the side face direction, thereby improving visibility from the housing side face direction.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a fire hydrant device installed so as to be exposed on a monitor passage provided along a tunnel wall surface.

Background Art

[0002] Conventionally, in tunnels such as highways and motorways, fire hydrant devices are installed as emergency facilities in the tunnel. For example, the fire hydrant device includes a fire hose with a water discharge nozzle attached to its tip and valves including a fire hydrant valve stored in a fire hydrant storage section inside a housing equipped with a forward-tilting fire hydrant door (forward-tilting door), and two fire extinguishers are stored in a fire extinguisher storage section inside a housing equipped with a fire extinguisher door. In addition, an electrical equipment door is provided in the fire hydrant device, and electrical equipment such as a red indicator lamp indicating the installation location, a transmitter for sending a fire alarm, and a response lamp are provided. Further, the fire hydrant device is generally installed by cutting out the tunnel wall surface provided with a monitor passage at intervals of, for example, 50 meters in the longitudinal direction of the tunnel and embedding it (Patent Document 1).

[0003] The fire hydrant devices installed in the tunnel are, for example, grouped into sections of four fire hydrant devices each, and each section is connected to a signal line from a disaster prevention receiving panel for monitoring and control. For example, when a fire breaks out and the transmitter is operated in any of the four fire hydrant devices installed in a certain section, and a fire alarm signal is sent to the disaster prevention receiving panel, the disaster prevention receiving panel outputs a fire alarm and lights up the response lamp of the fire hydrant device in which the transmitter was operated. In addition, when the disaster prevention receiving panel receives a pump start signal transmitted when the fire hydrant door is opened and the fire hydrant valve is opened after operating the transmitter and performs pump start control of the fire extinguishing pump facility, the red indicator lamps provided in all the fire hydrant devices blink simultaneously to notify the occurrence of a fire.

[0004] However, in tunnels constructed by the shield method or the like, due to the structure of the tunnel body, it is difficult to cut out the tunnel wall surface and embed the fire hydrant device due to cost and labor, so it is required to install the fire hydrant device in a state where it is exposed on the monitor passage.

[0005] For this reason, as a structure for installing the fire hydrant device in a state of being exposed on the monitor passage without removing the box on the tunnel wall surface, a wall-mounted structure has been proposed in which a pedestal is installed on the tunnel wall surface and the fire hydrant device is attached and fixed to the installed pedestal. The pedestal of the wall-mounted structure is composed of a main support portion fixed to the wall surface and a posture holding member that holds the posture of the fire hydrant device (Patent Document 2).

[0006] However, the installation of the fire hydrant device by the wall-mounted structure has problems such as taking a lot of man-hours and time to attach the fire hydrant device to the tunnel wall surface. Therefore, it has been proposed to adopt a so-called stationary structure in which a pedestal is installed on the road surface of the monitor passage where installation is easy, and the device body of the fire hydrant device is attached and fixed to the installed pedestal.

[0007] By the way, in the case of a fire hydrant device in which a housing is installed at a predetermined height on the monitor passage, it is necessary to make it as thin as possible in order not to obstruct the passage of the monitor passage. For example, the depth that can accommodate the fire extinguisher, which is the largest device housed in the fire hydrant device, is made thin, for example, about 25 centimeters.

[0008] However, a red indicator light is installed in the fire hydrant device to make the installation location of the fire hydrant device visible from a distance. In order to enable visual recognition from the front and side of the housing, the red indicator light protrudes about several centimeters from the front of the housing, which is a factor that hinders the thinness of the fire hydrant device.

[0009] In order to solve this problem, in the fire hydrant device of Patent Document 3, the user of the fire hydrant device is the driver of the vehicle passing through the tunnel, and the driver is looking at the fire hydrant device from the left side direction. Therefore, in the fire hydrant device of Patent Document 3, a red indicator light is provided on the fire extinguisher door. When the transmitter is operated due to a fire, the fire extinguisher door is rotated in the left side direction of the fire hydrant device that the driver usually looks at to direct the red indicator light in the left side direction, thereby enhancing the visibility from the side direction.

Prior Art Documents

Patent Documents

[0010]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0011] However, in the fire hydrant device of Patent Document 3, a red indicator light is provided on the fire extinguisher door, and when a fire occurs, the fire extinguisher door is opened and the red indicator light is directed toward one side surface direction that is in the line of sight direction from the driver. However, the fire extinguisher door is, for example, about 85×40 cm in length and width and has a certain weight, so the structure and mechanism for driving the opening of the fire extinguisher door must also be enlarged. Furthermore, in order to prevent the fire extinguisher door from opening accidentally and to ensure that it can be easily opened when a person opens it, a certain opening force is specified. For example, it is set to 49 N to 98 N, and a considerable driving force is required to open the door.

[0012] In addition, by opening the fire extinguisher door in the side surface direction, the passage of the supervisor passage may be significantly obstructed by the opened fire extinguisher door, which may hinder the evacuation behavior using the supervisor passage.

[0013] An object of the present invention is to provide a fire hydrant device that can improve the visibility from the side surface direction of a display device indicating the installation location with a simple structure while ensuring the passage of the supervisor passage.

Means for Solving the Problems

[0014] The present invention is a fire hydrant device in which a housing storing predetermined fire hydrant equipment is installed at a predetermined height above the road surface of a supervisor passage provided along the wall surface of a tunnel having a road, the housing being close to or in contact with the tunnel wall surface. A display device that performs a red display indicating the installation location is provided on a child door that opens horizontally during a fire and is arranged at a predetermined position in front of the housing.

[0015] (Location of the display device) The child door is arranged at the upper part of the front surface close to one side surface facing the vehicle traveling direction.

[0016] (Child door opening activation part) The child door has an opening activation part, The opening activation part includes a closing holding part that holds the child door in the closed position, a biasing member that biases the child door in the opening direction, an activation part that releases the closing holding of the child door by the closing holding part and opens the child door by the biasing member, a control part that activates the activation part to open the child door when a predetermined door opening condition is satisfied. It is provided with.

[0017] (Child door opening control 1) The display device is constantly lit by receiving power from the wiring from the disaster prevention receiving panel, and blinks by disconnecting and connecting the power supply from the wiring when a fire is received by the disaster prevention receiving panel. When the control part detects the disconnection and connection of the power supply from the wiring that blinks the display device as a door opening condition, it activates the activation part to open the child door after a predetermined delay time different from other fire hydrant devices has elapsed.

[0018] (Child door opening control 2) Transmitters and response lamps provided for each of a plurality of fire hydrant devices installed in a predetermined section in the tunnel are connected to the same wiring from the disaster prevention receiving panel. The wiring is a first signal line to which a transmitter is connected and which transmits a fire alarm signal to the disaster prevention receiving panel when the transmitter is operated, a second signal line to which a response lamp is connected and to which a control voltage is supplied when a fire alarm signal is received through the first signal line, and the response lamp is lit on the condition that the transmitter is operated. A third signal line to which a predetermined driving voltage used for opening the sub-door is constantly supplied, including The control unit, as a door opening condition, when the first door opening condition is satisfied that the transmitter is operated and a driving voltage is supplied from the third signal line to the starting unit, when the second door opening condition is satisfied that a control voltage is supplied from the second signal line to the starting unit along with the operation of the transmitter in another fire hydrant device, or when the third door opening condition is satisfied that a control voltage is supplied from the second signal line to the starting unit along with the detection of a fire by a fire detector provided in the installation section of a plurality of fire hydrant devices, after a predetermined delay time different from that of other fire hydrant devices has elapsed, the starting unit is activated to open the sub-door.

[0019] (Sub-door opening control 3) The transmitters and response lamps provided for each of the plurality of fire hydrant devices installed in a predetermined section in the tunnel are connected to the same wiring from the disaster prevention receiving panel, The wiring is a first signal line to which the transmitter is connected and which transmits a fire alarm signal to the disaster prevention receiving panel when the transmitter is operated, a second signal line to which the response lamp is connected and to which a control voltage is supplied from the disaster prevention receiving panel when a fire alarm signal is received via the first signal line, and the response lamp is lit on the condition that the transmitter is operated, a third signal line to which a predetermined control voltage is supplied when a fire alarm signal is received via the first signal line and when a predetermined signal associated with the detection of a fire by a fire detector provided in the installation section of a plurality of fire hydrant devices is received by the disaster prevention receiving panel, including The control unit, as a door opening condition, when the first door opening condition is satisfied that the transmitter is operated and a control voltage is supplied from the third signal line to the starting unit, when the second door opening condition is satisfied that a control voltage is supplied from the third signal line to the starting unit along with the operation of the transmitter in another fire hydrant device, or When a third door opening condition is satisfied, where a control voltage is supplied from a third signal line to an activation unit in response to a fire detection by a fire detector provided in an installation section of a plurality of fire hydrant devices, the activation unit is activated to open the sub-door.

[0020] (Sequential delayed opening of the sub-door) In the sub-door opening control 3, a plurality of fire hydrant devices are sequentially connected via an open detection switch that closes as the sub-door opens, and the third signal line is closed. The control unit is set with the same predetermined delay time as other fire hydrant devices. When the door opening condition is satisfied, after the elapse of the delay time, the activation unit is activated to open the sub-door, and at the same time, a control voltage is applied to the third signal line of the next-stage fire hydrant device by the closing of the open detection switch to sequentially open the sub-doors.

[0021] (Double-sided display device) The display device includes a display surface that performs a red display on both the front and back surfaces of the sub-door.

Advantages of the Invention

[0022] (Fire hydrant device) The present invention is a fire hydrant device in which a housing storing predetermined fire hydrant equipment is installed at a predetermined height above the road surface of a supervisor passage provided along the wall surface of a tunnel having a road, in proximity to or in contact with the tunnel wall surface. A display device that performs a red display indicating the installation location is provided on a sub-door that opens horizontally during a fire at a predetermined position on the front surface of the housing. Therefore, normally, since the display surface faces forward, appropriate visibility is obtained when the user views the fire hydrant device from the front direction and from an oblique side direction. Also, during a fire, the sub-door opens horizontally and opens in a direction substantially orthogonal to the front surface, and the display surface of the display device provided on the sub-door faces one side surface direction relative to the vehicle traveling direction in the tunnel, ensuring high visibility when viewed by the driver of a vehicle traveling in the tunnel. Further, since the sub-door provided with the display device is small in size and light in weight, it can be opened and closed by a simple structure and mechanism. Also, since the sub-door is small in size, it does not obstruct the passage of the supervisor passage, which serves as an evacuation route, even when opened.

[0023] (Effect of the location of the display device) In addition, since the sub-door is disposed at the upper part of the front surface close to one side surface facing the vehicle traveling direction, when the sub-door is closed and the display surface faces the front, the display device is located at a high position above the fire hydrant device installed at a predetermined height on the monitor passage. Therefore, when the user views the fire hydrant device from the front and the diagonal side, high visibility is ensured. Further, even when the sub-door opens laterally during a fire and the display surface faces one side surface direction opposite to the vehicle traveling direction in the tunnel, the display device is located at a high position above the fire hydrant device installed at a predetermined height on the monitor passage. Therefore, high visibility is ensured when viewed by the driver of a vehicle traveling in the tunnel.

[0024] (Effect of opening the sub-door in conjunction with the operation of the transmitter) In addition, since the sub-door is opened when the transmitter disposed on the front surface of the housing is operated, when a user uses the fire hydrant device during a fire, a fire alarm is first made by operating the transmitter. For this reason, the fire hydrant device is configured such that the sub-door opens laterally in conjunction with the fire alarm operation of the transmitter and the display surface faces one side surface direction opposite to the vehicle traveling direction in the tunnel, and the disaster prevention receiver panel blinks the display device of the laterally opened sub-door. Therefore, higher visibility is ensured when viewed by the driver of a vehicle traveling in the tunnel.

[0025] (Effect of the opening activation part of the sub-door) In addition, the sub-door has an opening activation part, and the opening activation part includes a closing holding part that holds the sub-door in the closed position, a biasing member that biases the sub-door in the opening direction, an activation part that releases the closing holding of the sub-door by the closing holding part and opens the sub-door by the biasing member, and a control part that activates the activation part to open the sub-door when a predetermined door opening condition is satisfied. Therefore, the sub-door provided with the display device is held in the closed state while being biased in the opening direction by the biasing member, and the sub-door can be opened to a predetermined position by the biasing member simply by the activation part releasing the closing holding of the sub-door. Thus, the opening operation of the sub-door with a simple structure becomes possible.

[0026] (Effect of the sub-door opening control 1) In addition, the display device is constantly lit by receiving power supply through wiring from the disaster prevention receiving panel, and is blinked by disconnecting / connecting the power supply from the wiring when a fire is received by the disaster prevention receiving panel. When the control unit detects the disconnection / connection of the power supply from the wiring that blinks the display device as a door opening condition, it activates the starting unit after a predetermined delay time different from that of other fire hydrant devices to open the sub-door. Therefore, when a fire is received by the disaster prevention receiving panel and the pump starting control of the fire pump facility is performed, the red displays of the display devices provided in all the fire hydrant devices blink simultaneously. Along with this, the sub-doors of all the fire hydrant devices open horizontally, and the display surface of the display device faces one side surface direction relative to the vehicle traveling direction in the tunnel. This ensures higher visibility when the driver of a vehicle traveling in the tunnel sees the fire hydrant device.

[0027] (Effect of Sub-door Opening Control 2) In addition, transmitters and response lamps provided for each of a plurality of fire hydrant devices installed in a predetermined section within the tunnel are connected to the same wiring from the disaster prevention receiving panel. The wiring includes a first signal line to which the transmitter is connected and which transmits a fire alarm signal to the disaster prevention receiving panel when the transmitter is operated, a second signal line to which the response lamp is connected and to which a control voltage is supplied when a fire alarm signal is received via the first signal line, and the response lamp is lit on the condition that the transmitter is operated, and a third signal line to which a predetermined driving voltage used for opening the sub-door is constantly supplied. The control unit, as a door opening condition, when a first door opening condition that the transmitter is operated and a driving voltage is supplied from the third signal line to the starting unit is satisfied, when a second door opening condition that a control voltage is supplied from the second signal line to the starting unit along with the operation of the transmitter in another fire hydrant device is satisfied, or when a third door opening condition that a control voltage is supplied from the second signal line to the starting unit along with the detection of a fire by a fire detector installed in the installation section of a plurality of fire hydrant devices is satisfied, starts the starting unit and opens the sub-door after a predetermined delay time different from that of other fire hydrant devices has elapsed. Therefore, when the transmitter of a fire hydrant device installed nearby is operated due to a fire, the first door opening condition is satisfied and the sub-door opens horizontally. Also, in other fire hydrant devices connected to the same signal line from the disaster prevention receiving panel where the transmitter is not operated, the second door opening condition is satisfied and the sub-door opens horizontally. Furthermore, even if the transmitter is not operated, when a fire is detected by a fire detector installed in the same section as the fire hydrant device, the third door opening condition is satisfied and the sub-doors of all of the plurality of fire hydrant devices connected to the same wiring open horizontally. In the case of a section where, for example, four fire hydrant devices are installed and a fire is detected, the display surface of the display device blinks in a state facing one side direction relative to the vehicle traveling direction in the tunnel, so that when a driver of a vehicle traveling in the tunnel sees the fire hydrant device in the fire occurrence section, higher visibility is ensured.

[0028] Also, in the sub-door opening controls 1 and 2, the control unit is set with a predetermined delay time different from other fire hydrant devices. When the door opening condition is satisfied, the activation unit is activated after the elapse of the predetermined delay time to open the sub-door. Therefore, the opening drives of the sub-doors are sequentially performed after different delay times, preventing an increase in the drive current flowing through the signal line from the disaster prevention receiving panel and enabling reduction of the capacity of the drive power supply on the disaster prevention receiving panel side.

[0029] (Effect of the sub-door opening control 3) In addition, transmitters and response lamps provided for each of a plurality of fire hydrant devices installed in a predetermined section in the tunnel are connected to the same wiring from the disaster prevention receiving panel. The wiring includes a first signal line to which the transmitter is connected and which transmits a fire alarm signal to the disaster prevention receiving panel when the transmitter is operated, a second signal line to which the response lamp is connected and to which a control voltage is supplied from the disaster prevention receiving panel when a fire alarm signal is received via the first signal line and the response lamp is lit on the condition that the transmitter is operated, and a third signal line to which a predetermined control voltage is supplied when a fire alarm signal is received via the first signal line and when a predetermined signal associated with fire detection by a fire detector provided in the installation section of the plurality of fire hydrant devices is received by the disaster prevention receiving panel. The control unit, as a door opening condition, activates the activation unit to open the sub-door when a first door opening condition in which a control voltage is supplied from the third signal line to the activation unit when the transmitter is operated is satisfied, when a second door opening condition in which a control voltage is supplied from the third signal line to the activation unit with the operation of the transmitter in another fire hydrant device is satisfied, or when a third door opening condition in which a control voltage is applied from the third signal line to the activation unit with fire detection by a fire detector provided in the installation section of the plurality of fire hydrant devices is satisfied. Therefore, the same effect as in the case of the above-described sub-door opening control 2 is obtained.

[0030] (Effect of the sequential opening of the sub-doors with delay) In addition, in the sub-door opening control 3, a plurality of fire hydrant devices are sequentially connected via an opening detection switch through which the third signal line closes as the sub-door opens. The control unit is set with the same predetermined delay time as other fire hydrant devices. When the door opening condition is satisfied, after the elapse of the delay time, the starting unit is activated to open the sub-door, and at the same time, a control voltage is supplied to the third signal line of the next-stage fire hydrant device by the closing of the opening detection switch to sequentially open the sub-doors. Therefore, by a simple configuration of supplying a control voltage to the third signal line of the next-stage fire hydrant device by the closing of the opening detection switch associated with the opening of the sub-door, such as a limit switch or the like, the sequential opening of the sub-doors is enabled. Also, by simply setting the same delay time for a plurality of fire hydrant devices, control for sequentially opening the sub-doors when the delay time has elapsed is enabled. In the sub-door opening control 3, the delay time may be set to zero. In this case, control for sequentially opening the sub-doors every time the time required for starting the starting unit has elapsed is enabled.

[0031] (Effect of the double-sided display device) In addition, since the display device has display surfaces for performing red display on both the front and back of the sub-door, when the sub-door opens horizontally, the front display surface of the display device arranged on the sub-door faces one side direction (left side direction) relative to the vehicle traveling direction in the tunnel, and the back display surface of the display device faces the other side direction (right side direction), ensuring high visibility from the front and the left and right diagonal directions of the fire hydrant device.

Brief Description of the Drawings

[0032]

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[0033] Hereinafter, embodiments of the fire hydrant device and the disaster prevention system according to the present invention will be described with reference to the drawings. Note that the present invention is not limited by the following embodiments.

[0034] [Basic Concepts of the Embodiment] First, the basic concept of the embodiment will be described. The embodiment generally relates to a fire hydrant device installed so as to be exposed in an inspector passage provided along a tunnel wall surface.

[0035] Here, the "fire hydrant device" is a type of emergency equipment installed in tunnels such as highways and motorways that are the areas to be extinguished. It includes fire hydrant equipment such as a fire hose, electrical equipment such as a red indicator light and a transmitter indicating the installation location, a terminal box, and a fire extinguisher that are installed or housed, and is a concept including the fire hydrant equipment where the fire hydrant device is installed.

[0036] In addition, the fire hydrant device of the embodiment is installed at a predetermined height above the road surface of an inspector passage provided along the tunnel wall surface so as to be close to or in contact with the tunnel wall surface, and includes a fire hydrant device installed in a state where the fire hydrant device is exposed in the inspector passage and installed by a "wall-mounted structure" or a "standing structure".

[0037] Here, as described in the background art, the "wall-mounted structure" is a structure that enables the fire hydrant device to be wall-mounted with respect to the tunnel wall surface by installing a mount on the tunnel wall surface and attaching and fixing the fire hydrant device to the installed mount. The "standing structure" is a structure that enables the fire hydrant device to be installed on the road surface of the inspector passage by installing a mount on the road surface of the inspector passage and attaching and fixing the fire hydrant device to the installed mount.

[0038] In addition, the "mount" refers to a structure that supports objects by columns, beams, etc., and includes concepts such as a support base, a foundation, a base, a pedestal, and a base. Also, "installed close to or in contact with the tunnel wall surface" includes installing close to the tunnel wall surface, installing a part in contact with the tunnel wall surface, or installing a part fixed to the tunnel wall surface.

[0039] And the fire hydrant device of the embodiment is characterized in that a display device that performs a red display indicating the installation location is provided on a sub-door that opens horizontally during a fire and is arranged at a predetermined position on the front surface of the housing.

[0040] Here, the "display device" corresponds to the conventional "red indicator light", and by constantly performing red display, the installation location of the fire hydrant device in the tunnel can be visually recognized. Also, when the transmitter provided in the fire hydrant device is operated, the red display blinks or flickers under the control of the disaster prevention receiving board to notify that a fire has occurred in the installation section of the fire hydrant device.

[0041] In the display device of the embodiment, during a fire, the sub-door opens horizontally and opens in a direction substantially perpendicular to the front surface, and the display surface of the display device provided on the sub-door faces one side surface direction relative to the vehicle traveling direction in the tunnel, so that high visibility is ensured when seen by the driver of the vehicle traveling in the tunnel. Also, since the sub-door provided with the display device is small in size and light in weight, it can be opened and closed by a simple structure and mechanism.

[0042] Also, the sub-door is arranged at the upper part of the front surface close to one side surface opposite to the vehicle traveling direction. For this reason, when the sub-door opens horizontally during a fire and the display surface faces one side surface direction relative to the vehicle traveling direction in the tunnel, the display device is at a high position above the fire hydrant device installed at a predetermined height on the monitor passageway, so that high visibility is ensured when seen by the driver of the vehicle traveling in the tunnel.

[0043] Also, the sub-door is opened when the transmitter arranged on the front surface of the housing is operated. Here, when a user uses the fire hydrant device during a fire, first, a fire alarm is issued by operating the transmitter. For this reason, the fire hydrant device is interlocked with the fire alarm operation of the transmitter, the sub-door opens horizontally, the display surface faces one side surface direction relative to the vehicle traveling direction in the tunnel, and the disaster prevention receiving board blinks the display device of the horizontally opened sub-door along with the fire alarm operation, so that higher visibility is ensured when seen by the driver of the vehicle traveling in the tunnel.

[0044] In addition, the opening activation part of the sub-door includes a closing holding part that holds the sub-door in the closed position, a biasing member that biases the sub-door in the opening direction, an activation part that releases the closing hold of the sub-door by the closing holding part and opens the sub-door by the biasing member, and a control part that activates the activation part to open the sub-door when a predetermined door opening condition is satisfied. Therefore, the sub-door can be opened with a simple structure.

[0045] The control for opening the sub-door is divided into first to third sub-door opening controls. The first sub-door opening control (sub-door opening control 1) is as follows.

[0046] First, the display device is constantly lit by receiving power supply (for example, AC100V) through wiring from the disaster prevention receiving panel. When fire reception control is performed by the disaster prevention receiving panel and the pump start signal associated with the opening operation of the fire hydrant valve of the fire hydrant device is received and pump start control of the fire pump facility is performed, the display device is blinked by the disconnection and connection of the power supply from the wiring. The control part, as a door opening condition for sub-door opening control, when detecting the disconnection and connection of the power supply from the wiring that blinks the display device, performs control to activate the activation part to open the sub-door after a predetermined delay time different from that of other fire hydrant devices has elapsed.

[0047] Therefore, after a fire is received by the disaster prevention receiving panel and the pump start signal associated with the opening operation of the fire hydrant valve of the fire hydrant device is received and pump start control of the fire pump facility is performed, the red displays of the display devices provided in all the fire hydrant devices blink simultaneously. Along with this, the sub-doors of all the fire hydrant devices are sequentially opened horizontally, and the display surface of the display device faces one side surface direction relative to the vehicle traveling direction in the tunnel. When the driver of the vehicle traveling in the tunnel sees the fire hydrant device, higher visibility is ensured.

[0048] In addition, the second sub-door opening control (sub-door opening control 2) is as follows. First, transmitters and response lamps provided for each of a plurality of fire hydrant devices installed in a predetermined section in the tunnel are connected to the same wiring from the disaster prevention receiving panel.

[0049] Here, the wiring includes a first signal line to which a transmitter is connected and which transmits a fire alarm signal to the disaster prevention receiver when the transmitter is operated, a second signal line to which a response lamp is connected and which supplies a control voltage when a fire alarm signal is received via the first signal line and lights the response lamp on condition that the transmitter is being operated, and a third signal line to which a predetermined drive voltage used for opening the sub-door is constantly supplied.

[0050] The control unit, as a door opening condition, activates the activation unit after a predetermined delay time different from that of other fire hydrant devices has elapsed and opens the sub-door when a first door opening condition is satisfied, where the transmitter is operated and a drive voltage is supplied from the third signal line to the activation unit; when a second door opening condition is satisfied, where, along with the operation of the transmitter in another fire hydrant device, a control voltage is supplied from the second signal line to the activation unit; or when a third door opening condition is satisfied, where, along with the detection of a fire by a fire detector provided in the installation section of a plurality of fire hydrant devices, a control voltage is supplied from the second signal line to the activation unit.

[0051] Here, the "control voltage" is a line voltage that is not normally supplied to the signal line, has a voltage of 0V, and becomes a predetermined energized voltage supplied to the signal line when a predetermined condition is satisfied, and is a concept including a control signal. Also, the "drive voltage" is a line voltage that is constantly supplied to the signal line and is a predetermined energized voltage, and is a concept including a fixed voltage.

[0052] Therefore, when the transmitter of a fire hydrant device installed nearby is operated due to a fire, the first door opening condition is satisfied at that fire hydrant device and the sub-door is opened. On the other hand, at other fire hydrant devices connected to the same signal line from the disaster prevention receiver where the transmitter is not being operated, the second door opening condition is satisfied and the sub-door is opened. Furthermore, even if the transmitter is not operated, when a fire is detected by a fire detector, the third door opening condition is satisfied and the sub-door is opened.

[0053] As a result, a plurality of fire hydrant devices corresponding to the fire occurrence locations connected to the same signal line from the disaster prevention receiver, for example, the sub - doors of 4 fire hydrant devices are opened, the display surface of the display device faces one side direction relative to the vehicle traveling direction in the tunnel. In this state, when the disaster prevention receiver receives the pump start signal accompanying the opening operation of the fire hydrant valve of the fire hydrant device and the pump start control of the fire - fighting pump facility is performed, the red indicator lights of all the fire hydrant devices blink simultaneously, and for the fire hydrant devices in the section where the fire has occurred, higher visibility is ensured when the driver of the vehicle traveling in the tunnel sees the fire hydrant device.

[0054] Here, in the first and second sub - door opening controls (sub - door opening controls 1 and 2), a predetermined delay time different from that of other fire hydrant devices is set in the control unit. When the door opening condition is satisfied, the starting unit is started after the elapse of the predetermined delay time to open the sub - door. For this reason, the sub - doors are opened sequentially, preventing an increase in the drive current flowing due to the opening drive of the sub - doors, and reducing the capacity of the drive power supply on the disaster prevention receiver side becomes possible.

[0055] Also, the third sub - door opening control (sub - door opening control 3) is as follows. First, transmitters and response lamps provided for each of a plurality of fire hydrant devices installed in a predetermined section in the tunnel are connected to the same wiring from the disaster prevention receiver.

[0056] The wiring includes a first signal line to which the transmitter is connected and which transmits a fire alarm signal to the disaster prevention receiver when the transmitter is operated, a second signal line to which the response lamp is connected and to which a control voltage is supplied from the disaster prevention receiver when a fire alarm signal is received via the first signal line and the response lamp is lit on the condition that the transmitter is being operated, and a third signal line to which a predetermined control voltage is supplied when a fire alarm signal is received via the first signal line and when a predetermined signal accompanying the detection of a fire by a fire detector provided in the installation section of the plurality of fire hydrant devices is received by the disaster prevention receiver. Here, the third signal line is different from the case of the second sub - door opening control.

[0057] When the control unit satisfies the door opening conditions, i.e., when the first door opening condition is met where the transmitter is operated and a control voltage is supplied from the third signal line to the starting unit, when the second door opening condition is met where a control voltage is supplied from the third signal line to the starting unit due to the operation of the transmitter in another fire hydrant device, or when the third door opening condition is met where a control voltage is supplied from the third signal line to the starting unit due to a fire detection by a fire detector installed in the installation sections of multiple fire hydrant devices, it activates the starting unit to open the sub-door. Therefore, the same operation as in the case of the second sub-door opening control 2 described above can be obtained.

[0058] (Effect of Delayed Sequential Opening of Sub-Door) Also, in the third sub-door opening control (sub-door opening control 3), multiple fire hydrant devices are sequentially connected via an opening detection switch that closes when the sub-door is opened and the third signal line. The control unit has the same predetermined delay time set as in other fire hydrant devices. When the door opening condition is satisfied, after the elapse of the delay time, it activates the starting unit to open the sub-door, and supplies a control voltage to the third signal line of the next-stage fire hydrant device by the closing of the opening detection switch to sequentially open the sub-doors.

[0059] Therefore, it enables the sequential opening of the sub-door with a simple configuration of supplying a control voltage to the third signal line of the next-stage fire hydrant device by the closing of the opening detection switch associated with the opening of the sub-door, such as a limit switch. Also, by simply setting the same delay time for multiple fire hydrant devices, it enables the control to sequentially open the sub-door when the delay time elapses. In the sub-door opening control 3, the delay time may be set to zero. In this case, the control to sequentially open the sub-door is performed every time the time required for the activation of the starting unit elapses.

[0060] In addition, the display device may be provided with display surfaces that perform red display on both the front and back surfaces of the sub-door. For this reason, when the sub-door opens horizontally, the front display surface of the display device arranged on the sub-door faces one side surface direction (left side surface direction) relative to the vehicle traveling direction in the tunnel, and the back display surface of the display device faces the other side surface direction (right side surface direction), ensuring high visibility from the front and the left and right diagonal directions of the fire hydrant device.

[0061] Hereinafter, specific embodiments will be described. In the specific embodiments shown below, the "fire hydrant device" is installed as a "tunnel emergency facility", the "display device that performs red display indicating the installation location" is taken as a "display device equipped with a sub-door and a red display lamp", and the case where the "display device" is arranged on the upper side of the front surface close to the side surface of the third housing (fire extinguisher storage housing) in which the fire extinguisher is stored will be described.

[0062] [Specific Contents of the Embodiment] An embodiment of the fire hydrant device will be described. The content will be described separately as follows. a. Disaster Prevention System b. Fire Hydrant Device b1. Outline of the Fire Hydrant Device b2. Installation of the Fire Hydrant Device b3. Thinning of the Fire Hydrant Device c. Display Device c1. Arrangement of the Display Device c2. Structure of the Display Device c3. Control Unit of the Display Device c4. First Embodiment of Sub-Door Opening Control c5. Second Embodiment of Sub-Door Opening Control c6. Third Embodiment of Sub-Door Opening Control d. Dual-Sided Display Device e. Other Embodiments of the Fire Hydrant Device f. Modification Examples of the Present Invention

[0063] [a. Disaster Prevention System] First, a tunnel disaster prevention system in which a fire hydrant device is connected to a disaster prevention receiving panel will be described. In this description, refer to FIG. 1 showing an outline of a tunnel disaster prevention system in which a fire hydrant device is connected to a signal line from the disaster prevention receiving panel.

[0064] As shown in FIG. 1, the disaster prevention receiving panel 100 is installed in an electrical room or the like of a management facility constructed corresponding to the tunnel to be monitored, and is installed at a predetermined height above the road surface of a monitor passage provided along the wall surface of a tunnel having a road, and is connected to a plurality of fire hydrant devices 10.

[0065] The fire hydrant devices 10 are installed in the tunnel at intervals of 50 meters. The fire hydrant devices 10 are connected to a low-voltage wiring cable 11 and a high-voltage wiring cable 13 laid in the tunnel and drawn out from the disaster prevention receiving panel 100. The high-voltage wiring cable 13 supplies a high-voltage power source of, for example, AC100V, and all the fire hydrant devices 10 are connected thereto. The low-voltage wiring cable 11 supplies a low-voltage power source of, for example, DC48V. For example, taking 200 meters as one section, four fire hydrant devices 10 belonging to one section are connected to the low-voltage wiring cable 11 laid in the tunnel for each section. Here, a plurality of signal lines are housed in the wiring cable 11 as required.

[0066] The fire hydrant device 10 is provided with a display device 30 indicating the installation location. The display device 30 is provided with a red indicator lamp 34 on a sub-door 32 that can be opened laterally. The red indicator lamp 34 receives the supply of a high-voltage power source (AC100V) from the high-voltage wiring cable 13 and constantly lights up to indicate the installation location of the fire hydrant device 10.

[0067] When a fire is received by the disaster prevention receiver panel 100 and a pump start signal accompanying the opening operation of the fire hydrant valve of the fire hydrant device is received in this state and the pump start control of the fire extinguishing pump facility is performed, the supply of the high-voltage power supply (AC100V) by the high-voltage wiring cable 13 is disconnected and connected at a predetermined cycle, and the red indicator lights 34 of all the fire hydrant devices 10 blink simultaneously. In this case, the sub-doors 32 of the fire hydrant devices 10 are sequentially driven and opened according to different preset delay times. Here, for the opening control of the sub-doors 32, there are control to sequentially open the sub-doors 32 of all the fire hydrant devices 10 and control to sequentially open the sub-doors 32 of, for example, four fire hydrant devices 10 corresponding to the fire occurrence location connected to the same signal line from the disaster prevention receiver panel 100.

[0068] Also, in the tunnel, fire detectors 120 are installed at intervals of 25 meters or 50 meters and are connected to the disaster prevention receiver panel 100 via the wiring cable 110 laid in the tunnel. The fire detectors 120 monitor the radiant energy, for example, infrared rays, from the fire flames generated in the tunnel through the light-transmitting windows, have detection areas in both left and right directions, and are arranged such that the detection areas with adjacent fire detectors 120 overlap complementarily. For this reason, even when the disaster prevention receiver panel 100 receives a fire detection signal from the fire detector 120, it performs control to blink the red indicator lights 34 of all the fire hydrant devices 10 and control to sequentially open the sub-doors 32 of all the fire hydrant devices 10 or, for example, four fire hydrant devices 10 corresponding to the fire occurrence location connected to the same signal line.

[0069] [b. Fire Hydrant Device] Subsequently, an embodiment of the fire hydrant device will be described. The fire hydrant device is provided with a display device that performs a red display indicating the installation location at a predetermined position on the front surface of the housing.

[0070] (b1. Overview of Fire Hydrant Device) First, the overview of the fire hydrant device will be described. In this description, refer to FIG. 2 showing the embodiment of the fire hydrant device installed on the road surface of the monitor passage from the front in the installation state in the tunnel and FIG. 3 showing the fire hydrant device of FIG. 2 from the left side.

[0071] Here, in the descriptions of FIGS. 2 and 3, the X-Y-Z directions are perpendicular to each other. Specifically, when looking at the front of the fire hydrant device 10 as the front, the X direction is the left-right direction, the Y direction is the up-down direction, and the Z direction is the front-back direction. Also, the +X side in the X direction is the right side, the -X side is the left side, the +Y side in the Y direction is the upper side, the -Y side is the lower side, the +Z side in the Z direction is the front side, and the -Z side is the rear side. This is the same in FIGS. 3 to 15 which are embodiments of the present invention.

[0072] As shown in FIG. 2, the fire hydrant device 10 is installed on a pedestal 65 installed on the road surface of the supervisor passage 64. The housing of the fire hydrant device 10 is divided into a first housing 12a, a second housing 12b, and a third housing 12c, and a decorative frame is attached to each front surface.

[0073] A door opening 19 is formed on the front surface of the first housing 12a. Below the door opening 19, when the lock is released by the operation of the door opening / closing handle 1410, a fire hydrant door 14 that opens downward with the lower end as the axis by a hinge 14a is arranged.

[0074] Above the door opening 13 of the first housing 12a, a maintenance door 15 that opens upward with the upper end as the axis by a hinge 15a is arranged above the door opening 13. The upwardly opened maintenance door 15 is held in an open state by a stay (support rod) arranged inside the door.

[0075] In the fire hydrant storage part inside the first housing 12a, for example, a fire hose equipped with a water discharge nozzle is stored in a coiled manner in the lower hose storage part, and valves such as a fire hydrant valve are stored in the upper valve storage part. Also, a fire hydrant valve opening / closing lever, a water supply faucet, and a pump start switch are provided in the fire hydrant storage part inside the fire hydrant door 14.

[0076] On the right side of the front door opening of the second housing 12b, an electrical equipment door 18 that opens horizontally to the right by a hinge 18a is arranged, and on the left side, an auxiliary door 20 that opens horizontally to the left by a hinge 20a to enable access to the internal terminal boxes 28a, 28b is arranged.

[0077] On the electrical equipment door 18, as electrical equipment, for example, a transmitter 22 and a response lamp 24 are provided, and a telephone jack 26 is provided on the inside. When the transmitter 22 is pressed, for example, when a fire or the like occurs and the push-button switch is turned on, a transmission signal is transmitted, and a fire alarm is output from the disaster prevention receiving panel that has received this signal. The fire hydrant device 10 that has received the response signal from the disaster prevention receiving panel lights up the response lamp 24.

[0078] On the rear surface inside the second housing 12b opposite to the auxiliary door 20, a high-voltage terminal box 28a and a low-voltage terminal box 28b are arranged side by side in the vertical direction. The high-voltage terminal box 28a (for example, AC100V) uses the built-in terminal block to connect the power cable for strong electricity drawn from outside the fire hydrant device 10 and a red indicator lamp for indicating the installation location described later. The low-voltage terminal box 28b (for example, DC48V) uses the built-in terminal block to connect the power cable for weak electricity drawn from outside the fire hydrant device 10, the transmitter 22, the response lamp 24, the telephone jack 26, and the like.

[0079] At the front door opening of the third housing 12c, a fire extinguisher door 16 that opens horizontally to the left by a hinge 16a is arranged. In the fire extinguisher storage part inside the third housing 12c, two fire extinguishers 17 are stored. Further, the fire extinguisher door 16 is provided with a door opening / closing handle 1610 to open the fire extinguisher door 16 that is closed, for example, by magnetic attraction. Further, the fire extinguisher door 16 is provided with a viewing window 1612 to enable confirmation of the presence or absence of the fire extinguisher 17 from the outside.

[0080] On the upper side of the front surface near the left side surface of the third housing 12c, a display device 30 for indicating the installation location of the fire hydrant device 10 is arranged. The display device 30 includes a sub-door 32 and a red indicator lamp 34. The sub-door 32 of the display device 30 is arranged, for example, in a door cutout part that rectangularly cuts out the upper left corner of the fire extinguisher door 16 and is arranged to be horizontally openable to the left with the left side as the axis.

[0081] The sub-door 32 is normally kept closed with the red indicator light 34 facing forward. When the transmitter 22 of the electrical equipment door 18 is operated, a fire alarm signal is transmitted to the disaster prevention receiving panel, a fire alarm is output, and control is performed to blink the red indicator lights 34 of all the fire hydrant devices 10, and control is also performed to sequentially open the sub-doors 32 of, for example, four fire hydrant devices 10 corresponding to all the fire hydrant devices 10 or the fire occurrence location connected to the same signal line. The sub-door 32 is opened horizontally to a position substantially perpendicular to the front surface, and the red indicator light 34 is directed toward the left side surface direction.

[0082] (b2. Installation of Fire Hydrant Device) Next, the installation of the fire hydrant device with respect to the supervisor passage will be described. As shown in FIG. 3, a road 60 is constructed in the longitudinal direction of the tunnel (the left-right direction in FIG. 2) at the lower part of the cylindrical (circular cross-section) tunnel body constructed by the shield method. A supervisor passage 64 at a predetermined height with respect to the road 60 is constructed on the lower side of the tunnel wall surface 25 along the road 60. The inside of the supervisor passage 64 is a duct, and a main water supply pipe 62 and cables are laid. A water supply pipe 66 is branched from the main water supply pipe 62 and drawn into the fire hydrant device 10.

[0083] Since it is difficult to cut out a box for installing the fire hydrant device 10 in the tunnel wall surface 25 constructed by the shield method, a gantry 65 is installed on the road surface of the supervisor passage 64 in proximity to the tunnel wall surface 25, and the connected first housing 12a, second housing 12b, and third housing 12c are attached and fixed on the gantry 65, thereby installing the fire hydrant device 10. Also, the upper part of the fire hydrant device 10 is fixed to the tunnel wall surface 25 by a housing support member 68 so as not to fall forward.

[0084] Here, the height of the gantry 65 is set so that the height from the road surface of the supervisor passage 64 to all the operation targets including the transmitter 22 and the drain nozzle arranged in the fire hydrant device 10 falls within the legally defined proper operation range. When the road surface of the supervisor passage 64 is taken as the standing position of the road user, as is well known, the legally defined proper operation range has a lower limit height H1 of 800 mm and an upper limit height H2 of 1500 mm from the road surface. Therefore, the vertical width Hw of the proper operation range is 700 mm.

[0085] In order for the entire vertical dimension of the hose storage section formed below the fire hydrant storage section (inside the first housing 12a) in the fire hydrant device 10 to fall within the vertical dimension Hw (= 700 mm) of the proper operation range, the installation height of the fire hydrant device 10 by the pedestal 65, that is, the height from the road surface of the supervisor passage 64 to the bottom surface (housing bottom surface) of the fire hydrant device 10 is the same as the lower limit value H1 of the proper operation range, which is 800 mm.

[0086] Also, as shown in FIG. 3, the pedestal 65 of the present embodiment has an inverted trapezoidal side surface shape with the upper side longer than the bottom side, and the rear side is an inclined surface slanting downward along the curved shape of the tunnel wall surface 25.

[0087] (b3. Thinning of the fire hydrant device) Next, the thinning of the fire hydrant device will be described. As shown in FIG. 3, in order to reduce the restriction on the passage width of the supervisor passage 64 due to the protrusion (bulge) of the fire hydrant device 10 installed on the road surface of the supervisor passage 64 by the pedestal 65 from the tunnel wall surface 25, the fire hydrant device 10 is thinned as much as possible.

[0088] Among the devices stored in the fire hydrant device 10, the one with the largest size in the front-rear direction is the fire extinguisher 17 stored in the third housing 12c. Since the thickness (front-rear width) of the fire hydrant device 10 can be thinned to a size where the fire extinguisher 17 can be stored in the third housing 12c, the width (thickness) of the fire hydrant device 10 is set to a predetermined width corresponding to the outer diameter of the fire extinguisher 17 stored in the third housing 12c.

[0089] The outer diameter of the fire extinguisher 17 is about 160 to 180 mm. When a gap is ensured so that the stored fire extinguisher does not contact the third housing 12c, the minimum width (minimum thickness) of the fire hydrant device 10 is, for example, 250 mm or less, and the width of the fire hydrant device 10 is set to a predetermined width of, for example, 25 cm or less. On the other hand, since the width of the conventional fire hydrant device 10 that is installed by cutting out the wall surface of the tunnel body and embedding it is 300 mm or more, the fire hydrant device 10 of the present embodiment has a reduced width and is thinned compared to the conventional device.

[0090] In addition, the first housing 12a of the fire hydrant device 10 is configured to store a fire hose of a predetermined length, which is the same as that of a conventional fire hydrant device, for example, a 30 m retaining hose, in a wound state inside. By expanding the lateral width (width in the left - right direction) of the first housing 12a compared to a conventional fire hydrant device, it is possible to store the retaining hose of the same predetermined length as before in a wound state inside.

[0091] Also, in a conventional fire hydrant device, the terminal boxes 28a and 28b were arranged on the rear surface of the housing behind the fire extinguisher storage section where the fire extinguisher is stored. However, with the thinning of the fire hydrant device 10, it becomes impossible to arrange the terminal boxes 28a and 28b on the rear surface of the housing behind the fire extinguisher storage section. Therefore, the lateral width (width in the left - right direction) of the second housing 12b where the electrical equipment is provided has been expanded to a width that allows the electrical equipment and the terminal boxes to be arranged.

[0092] [c. Display device] Next, a display device equipped with a sub - door and a red indicator light installed on the upper side of the front surface close to the side surface of the housing will be described. In this description, reference is made to FIG. 4 showing the display device arranged on the front surface of the housing of the fire hydrant device, FIG. 5 showing the state where the sub - door of the display device is open, and FIG. 6 showing the relationship between the display device and the fire extinguisher door in a plane. Note that FIG. 6(A) shows the state where the fire extinguisher door is closed, and FIG. 6(B) shows the state where the fire extinguisher door is open.

[0093] (c1. Arrangement of the display device) As shown in FIG. 4, in the third housing 12c provided with a fire extinguisher storage section, a fire extinguisher door 16 is arranged at the front door opening, and a display device 30 is arranged on the upper side of the front surface close to the left side surface 52 of the third housing 12c. Since the arrangement position of the display device 30 overlaps with the arrangement position of the fire extinguisher door 16 provided on the front surface of the housing, the display device 30 is fixed inside the housing frame opposite to the door cutout portion 1614 formed for arranging the display device 30 at the upper left corner of the fire extinguisher door 16. For this reason, the fire extinguisher door 16 can be opened and closed independently of the display device 30.

[0094] The display device 30 has a sub-door 32 that is horizontally openable about its left end on the front of the housing, and a red indicator light 34 is provided at the center of the sub-door 32. Normally, the sub-door 32 is kept closed, and the red indicator light 34 faces forward.

[0095] When a user performs a fire alarm operation by pressing the transmitter 22 of the electrical equipment door 18 shown in Fig. 2 due to a fire in the tunnel, as shown in Fig. 5, the closed holding of the sub-door 32 is released, and the sub-door 32 opens horizontally and projects out at a position substantially perpendicular to the front of the housing. In this open state, the sub-door 32 turns the red indicator light 34 in the direction of the left side surface 52 of the third housing 12c, which can be seen by the driver of a vehicle traveling in the tunnel. Also, the red indicator light 34 of the opened sub-door 32 blinks under the control of the disaster prevention receiving panel 100. Here, the vertical and horizontal lengths of the sub-door 32 are each a predetermined length of about 10 to 10-odd centimeters, and even when the sub-door 32 is open, it does not obstruct the passage of the monitor passage serving as an evacuation route.

[0096] Fig. 6(A) shows a plan view of the state where the sub-door 32 in the closed position of the display device 30 is opened to the position indicated by the sub-door 32a. Since the red indicator light 34a of the sub-door 32a in the open position faces the left side surface of the third housing 12c, high visibility can be ensured when viewed by the driver of a vehicle traveling in the tunnel.

[0097] Also, even when the sub-door 32 of the display device 30 is in the open position as shown by the sub-door 32a, without being affected by the opening and closing of the sub-door 32, as shown in Fig. 6(B), the fire extinguisher door 16 can be opened to the position indicated by the fire extinguisher door 16b, enabling the user to open the fire extinguisher door 16 and take out the fire extinguisher 17 stored in the housing to perform a fire extinguishing operation.

[0098] (c2. Structure of the display device) Next, the structure of the display device will be described. In this description, reference will be made to FIG. 7 showing the front of the housing of the fire hydrant device where the display device is disposed, FIG. 8 showing the internal structure of the display device with the sub-door open, FIG. 9 showing a cross-section of the internal structure of the display device as viewed from the plane, and FIG. 10 showing the control unit of the display device together with the signal line from the disaster prevention receiving panel, the transmitter, and the response lamp. Note that FIG. 9(A) shows the state where the sub-door is closed, and FIG. 9(B) shows the state where the sub-door is open.

[0099] As shown in FIGS. 7 to 9, the display body 35 of the display device 30 is attached and fixed inside the door cutout portion 1614 of the fire extinguisher door 16. The display body 35 has a thin box shape with an opening in the front, and pivotally supports the sub-door 32 in the horizontal direction by upper and lower two-stage hinges 36 provided on the left side surface of the sub-door opening 31 on the front surface.

[0100] An opening activation part is provided for the sub-door 32. The structure of the opening activation part is arbitrary. For example, it is composed of a closing holding part that holds the sub-door 32 in the closed position, a biasing member that biases the sub-door 32 in the opening direction, and an activation part that releases the closing holding of the sub-door 32 by the closing holding part and opens the sub-door by the biasing member.

[0101] Specifically, leaf springs 38 that function as biasing members are provided in two upper and lower stages on the inner side of the door where the hinge 36 that pivotally supports the sub-door 32 is disposed. One end of the leaf spring 38 is fixed to the partition wall inside the display body 35, and the other end abuts and is pressed via a pin member against the inner side that becomes the rotation side of the sub-door 32, biasing the sub-door 32 in the opening direction.

[0102] As shown in FIGS. 8 and 9, a lock arm 40 that constitutes the closing holding part of the sub-door 32 and a plunger 44 that constitutes the activation part are provided at the center of the right side inside that becomes the open end of the sub-door 32.

[0103] A locking portion 3210 is provided at the center of the open end (right end) of the sub-door 32. The tip of the locking portion 3210 is curved in an arc shape toward the inside of the door. Corresponding to the locking portion 3210, a lock arm 40 pivotally supported by a hinge 42 is disposed within the display body 35. An engaging receiving portion 4010 is formed at the tip (left end) of the lock arm 40 so as to engage with the locking portion 3210 of the sub-door 32. Therefore, as shown in FIG. 9(A), when the sub-door 32 is closed, the locking portion 3210 engages with the engaging receiving portion 4010 at the tip of the lock arm 40, and the engaging receiving portion 4010 at the tip of the lock arm 40 biased and fixed in the locking direction by the shaft spring portion is pressed against and engaged with the locking portion 3210 of the sub-door 32 to hold the sub-door 32 in the closed position.

[0104] The pressing rod of the plunger 44 abuts against the rear end (right end) of the lock arm 40. The lock arm 40 is biased counterclockwise as viewed from the plane by a shaft spring or the like provided on the hinge 42, and the rear end is in contact with the pressing rod of the plunger 44.

[0105] The plunger 44 is an activation part that makes the pressing rod protrude and retract, and is a concept including a linear motor or a voice coil motor, and performs an activation operation (a straight-ahead movement operation) of protruding the pressing rod by energizing an electromagnetic induction coil. The activation current (driving current) of the plunger 44 is arbitrary. However, in the embodiment, since a small plunger having a stroke of about several millimeters may be used, for example, the activation current is about 600 to 700 mA.

[0106] When opening the sub-door 32, the plunger 44 is activated by supplying an activation voltage (driving voltage), and the pressing rod is pushed out to press the rear end of the lock arm 40, and the engaging receiving portion 4010 at the tip of the lock arm 40 is pulled away from the locking portion 3210 of the sub-door 32 to release the closed holding. When the closed holding of the sub-door 32 is released, the sub-door 32 is opened by the leaf spring 38 to a position substantially perpendicular to the front surface as shown in FIG. 9(B), and the red indicator lamp 34 provided on the sub-door 32 is directed toward the left side surface.

[0107] On the side where the leaf spring 38 of the display main body 34 is arranged, a limit switch 46 is arranged as an open detector for detecting the opening of the sub-door 32. In the closed state of the sub-door 32 shown in Fig. 9(A), the limit switch 46 receives the pressing of the switch knob by the sub-door 32 and the contact is on. As shown in Fig. 9(B), when the sub-door 32 is opened, the pressing of the switch knob is released and the contact is off. The limit switch 46 is used for starting control of the plunger 44.

[0108] The red indicator lamp 34 provided on the sub-door 32 is lit, for example, by receiving the supply of a high-voltage power source of AC100V from the disaster prevention receiving board to perform a red display. The high-voltage wiring cable 3010 is drawn out from behind the red indicator lamp 34 through the waterproof lead-out part 3012 and is connected to the high-voltage terminal box 28a shown in Fig. 2. Also, the high-voltage wiring cable 3010 is stored in a sufficiently relaxed state inside the display main body 35 and can be stretched when the sub-door 32 is opened as shown in Fig. 9(B).

[0109] (c3. First Embodiment of Sub-Door Opening Control) Subsequently, the first embodiment of the sub-door opening control by the control unit of the display device will be described. In this description, refer to Fig. 10 showing the first embodiment of the control unit of the display device provided in the fire hydrant device together with the signal line, transmitter, and response lamp from the disaster prevention receiving board.

[0110] A control unit 45 is arranged inside the display main body 35 of the display device 30 shown in Figs. 7 to 9. The control unit 45 performs control to activate the plunger 44 to open the sub-door 32 when a predetermined door opening condition is satisfied. A low-voltage wiring cable 4510 is drawn out from the control unit 45 through the waterproof lead-out part 4512 and is connected to the low-voltage terminal box 28b shown in Fig. 1.

[0111] Here, the door opening condition for opening the sub-door 32 when a fire is received by the disaster prevention receiving board 100 and all the red indicator lamps 34 of the fire hydrant devices 10 are blinked is set as the case where the disconnection and connection of the high-voltage power source (AC100V) supplied by the high-voltage wiring cable 13 from the disaster prevention receiving board 100 are detected.

[0112] Specifically explaining the control unit 45 in FIG. 10 is as follows. First, from the disaster prevention receiving panel 100, high-voltage signal lines 1310 and 1320 are drawn out by the high-voltage wiring cable 13, and a high-voltage power supply of AC100V is supplied, and the red indicator lamp 34 is always lit.

[0113] Also, by the low-voltage wiring cable 11, a first signal line 1110, a second signal line 1120, a third signal line 1130, and a common line 1140 are drawn out.

[0114] The first signal line 1110 is a line to which the switch contact 2210 of the transmitter 22 provided in the fire hydrant device 10 is connected, and a predetermined drive voltage, for example, DC48V, is always supplied. Therefore, when the switch contact 2210 is turned on by operating the transmitter 22, a line current flows from the signal line 1110 to the common line 1140, and a fire alarm signal is transmitted to the disaster prevention receiving panel 100.

[0115] The response lamp 24 is connected to the second signal line 1120 and the common line 1140 via the interlock switch contact 2220 of the transmitter 22. The control voltage is not normally supplied to the second signal line 1120. When the disaster prevention receiving panel 100 receives a fire alarm signal due to the operation of the transmitter 22 and outputs a fire alarm, a control voltage, for example, DC48V, is supplied to the second signal line 1120, and the response lamp 24 lights up on the condition that the interlock switch contact 2220 of the transmitter 22 is on. On the contrary, in the fire hydrant device where the transmitter 22 is not operated, since the interlock switch contact 2220 of the transmitter 22 is off, the response lamp 24 does not light up.

[0116] The third signal line 1130 is a newly provided signal line for driving the plunger 44 to open the sub-door 32, and a predetermined drive voltage, for example, DC48V, is always supplied.

[0117] In order to activate the plunger 44 by the control unit 45, a series circuit of a blinking detection unit 47, a timer relay 48, and a b-contact limit switch 46 that functions as a door opening detector is connected between the third signal line 1130 to which a driving voltage is constantly supplied and the common line 1140. The blinking detection unit 47 inputs the high voltage of AC100V supplied between the high voltage signal lines 1310 and 1320, detects that the high voltage input is disconnected and connected at a predetermined cycle, and outputs a relay drive signal.

[0118] The timer relay 48 can set a delay time within, for example, one minute. When energized, when the set delay time has elapsed, the normally open relay contact 48a is turned on. The normally open relay contact 48a of the timer relay 48 has the plunger 44 connected in series between the third signal line 1130 to which a driving voltage is constantly supplied and the common line 1140. When the timer relay 48 is energized, after the set delay time has elapsed, the normally open relay contact 48a is turned on to drive the plunger 44, and the sub-door 32 is opened. Note that when the number of fire hydrant devices 10 installed in the tunnel is large, the delay time set for the timer relay 48 is not prevented from setting the same delay time within a range not exceeding a predetermined number that is below a predetermined allowable drive current.

[0119] Subsequently, the opening control of the sub-door 32 according to the first embodiment of the control unit 45 will be described. When the transmitter 22 of the fire hydrant device 10 is operated, the switch contact 2210 and the interlocking switch contact 2220 of the transmitter 22 are turned on. When the switch contact 2210 is turned on, a fire alarm signal is transmitted to the disaster prevention receiving board 100 via the first signal line 1110. The disaster prevention receiving board 100 receives the fire alarm signal and outputs a fire alarm, and supplies a control voltage to the second signal line 1120. For this reason, the response lamp 24 lights up via the interlocking relay contact 2220 of the transmitter 22 that is turned on.

[0120] In addition, when the disaster prevention receiver 100 that has performed the fire reception operation operates the fire hydrant valve opening / closing lever of the fire hydrant device 10 that has operated the transmitter 22 to the open position and receives a pump start signal by turning on the pump start interlock switch to perform pump start control of the fire pump facility, the AC100V high-voltage power supply supplied between the high-voltage signal lines 1310 and 1320 is disconnected and connected at a predetermined cycle, and control is performed to blink all the red indicator lights 34 provided in all the fire hydrant devices 10 at the same time.

[0121] The blink detection unit 47 provided in the control unit 45 detects the disconnection and connection of the high voltage supplied between the high-voltage signal lines 1310 and 1320 that blink the red indicator light 34, and outputs a relay drive signal to the timer relay 48 to start the operation. When the set delay time has elapsed, the normally open relay contact 48a of the timer relay 48 turns on, and the plunger 44 is activated by energization.

[0122] The activated plunger 44 releases the closing hold of the sub-door 32 and opens it. When the sub-door 32 opens and the limit switch 46 turns off, the timer relay 48 recovers, the normally open relay contact 48a turns off, the energization of the plunger 44 stops, and the plunger 44 is restored to the initial position. For this reason, the sub-doors 32 of all the fire hydrant devices 10 are sequentially opened, and the red indicator lights 34 blink in a state facing the left side direction, ensuring high visibility when viewed by the driver of a vehicle traveling in the tunnel.

[0123] When restoring the sub-door 32 opened after the fire has been extinguished, as shown in FIGS. 8 and 9(B), the opened sub-door 32 is pushed into the closed position, and the locking portion 3210 of the sub-door 32 is pushed into and engaged with the locking receiving portion 4010 at the tip of the lock arm 40, enabling it to be held in the closed position.

[0124] (c4. Second Embodiment of Sub-Door Control) Subsequently, a second embodiment of the sub-door control by the control unit of the display device will be described. In this description, refer to FIG. 11 showing the second embodiment of the control unit of the display device provided in the fire hydrant device together with the signal line from the disaster prevention receiver, the transmitter, and the response lamp.

[0125] The control unit 45 shown in FIG. 11 performs control to activate the plunger 44 to open the sub-door 32 when a predetermined door opening condition is satisfied.

[0126] Here, the door opening conditions for opening the sub-door 32 in the second embodiment of the control unit include a first door opening condition, a second door opening condition, and a third door opening condition.

[0127] The "first door opening condition" is a condition that is satisfied when the transmitter 22 disposed in the fire hydrant device 10 is operated.

[0128] Further, the "second door opening condition" is a condition that is satisfied when, without operating the transmitter 22, the transmitter 22 of another fire hydrant device 10 connected to the same wiring cable 11 from the disaster prevention receiving board 100 is operated as shown in FIG. 1. In the present embodiment, since a signal (control voltage) for lighting the response lamp 24 is output from the disaster prevention receiving board 100 in accordance with the operation of the transmitter 22 of another fire hydrant device 10, it is determined that the condition is satisfied when the fire hydrant device 10 receives a signal (control voltage) for lighting the response lamp 24.

[0129] Furthermore, the "third door opening condition" is a condition that is satisfied when a fire is detected by any one of eight or four fire detectors 120 provided at intervals of 25 meters or 50 meters in the installation section (for example, a 200-meter section) of the four fire hydrant devices 10 without operating the transmitters 22 of the four fire hydrant devices 10 connected to the same signal line as shown in FIG. 1. In the present embodiment, since the disaster prevention receiving board 100 outputs a signal (control voltage) for lighting the response lamp 24, when a fire is detected by the fire detector 120, a signal (control voltage) for lighting the response lamp 24 of the fire hydrant device 10 is output from the disaster prevention receiving board 100, and it is determined that the third door opening condition is satisfied when the fire hydrant device 10 receives the signal.

[0130] The control unit 45 shown in Fig. 11 performs control to activate the plunger 44 based on the fulfillment of the above-described first to third door opening conditions and open the sub-door 32.

[0131] Also, each control unit 45 of the four fire hydrant devices 10 connected to the same low-voltage wiring cable 11 from the disaster prevention receiving panel 100 shown in Fig. 1 has different door opening delay times Td1, Td2, Td3, Td4 (for example, Td1 < Td2 < Td3 < Td4) set in advance. When the first to third door opening conditions are met, control is performed to activate the plunger 44 after the elapse of the set delay time for itself and sequentially open the sub-door 32. By preventing multiple plungers 44 from being activated simultaneously, the power supply capacity of the disaster prevention receiving panel 100 for activating the plunger 44 can be reduced.

[0132] Specifically explaining the control unit 45 in Fig. 11 is as follows. First, from the disaster prevention receiving panel 100, a first signal line 1110, a second signal line 1120, a third signal line 1130, and a common line 1140 are drawn out by the low-voltage wiring cable 11.

[0133] The first signal line 1110 is a line to which the switch contact 2210 of the transmitter 22 provided in the fire hydrant device 10 is connected, and a predetermined drive voltage, for example, DC48V, is constantly supplied. Therefore, when the switch contact 2210 is turned on by operating the transmitter 22, a line current flows from the signal line 1110 to the common line 1140, and a fire alarm signal is transmitted to the disaster prevention receiving panel 100.

[0134] Here, in addition to the switch contact 2210, the transmitter 22 uses a three-circuit push-button switch having interlocking switch contacts 2220 and 2230. The conventional transmitter has two-circuit switch contacts as shown in Fig. 10 and is used for the transmitter 22 and the response lamp 24. In this embodiment, a three-circuit push-button switch with one more switch contact is used to control the plunger 44.

[0135] A response lamp 24 is connected to the second signal line 1120 and the common line 1140 via the interlock switch contact 2220 of the transmitter 22. No control voltage is normally supplied to the second signal line 1120. When the disaster prevention receiver 100 receives a fire alarm signal by operating the transmitter 22 and outputs a fire alarm, a control voltage, for example, DC48V, is supplied to the second signal line 1120, and the response lamp 24 lights up on condition that the interlock switch contact 2220 of the transmitter 22 is on. On the other hand, in a fire hydrant device where the transmitter 22 is not operated, the interlock switch contact 2220 of the transmitter 22 is off, so the response lamp 24 does not light up.

[0136] The third signal line 1130 is a newly provided signal line for activating the plunger 44 to open the sub-door 32, and a predetermined drive voltage, for example, DC48V, is constantly supplied.

[0137] To drive the plunger 44 by the control unit 45, a series circuit of the interlock switch contact 2230 of the transmitter 22, a diode 54, a timer relay 48, and a limit switch 46 that functions as a door opening detector is connected between the third signal line 1130 to which the drive voltage is constantly supplied and the common line 1140. When the transmitter 22 is operated, it determines whether the first door opening condition is satisfied and activates the plunger 44.

[0138] Also, the positive side of the timer relay 48 is connected to the second signal line 1120. When a control voltage is supplied to the second signal line 1130 to light up the response lamp 24 from the disaster prevention receiver 100 with the operation of the transmitter 22, it determines whether the second door opening condition is satisfied and activates the plunger 44.

[0139] The timer relay 48 can set the delay time within a range of, for example, within 1 minute. When energized, when the set delay time has elapsed, the normally open relay contact 48a is turned on. The normally open relay contact 48a of the timer relay 48 has a plunger 44 connected in series between the third signal line 1130 to which the drive voltage is constantly supplied and the common line 1140. When the timer relay 48 is energized, after the set delay time has elapsed, the normally open relay contact 48a is turned on to activate the plunger 44, and the sub-door 32 is opened.

[0140] Subsequently, the sub-door opening control according to the second embodiment of the control unit 45 will be described. When the transmitter 22 of the fire hydrant device 10 is operated, the switch contact 2210 and the interlocking switch contacts 2220, 2230 of the transmitter 22 are turned on. When the switch contact 2210 is turned on, a fire alarm signal is transmitted to the disaster prevention receiving board 100 via the first signal line 1110. The disaster prevention receiving board 100 that performs fire alarm control based on the reception of the fire alarm signal supplies a control voltage to the second signal line 1120. For this reason, the response lamp 24 lights up via the interlocking relay contact 2220 of the transmitter 22 that is turned on.

[0141] Also, when the interlocking switch contact 2230 of the transmitter 22 is turned on, the drive voltage of the third signal line 1130 is supplied to the timer relay 48 via the diode 54. At this time, since the sub-door 32 is held closed and the limit switch 46 is turned on, the timer relay 48 starts operating when energized. When the set delay time has elapsed, the normally open relay contact 48a is turned on, and the plunger 44 is activated by energization.

[0142] The activated plunger 44 releases the holding and locks the sub-door 32 to open it. When the sub-door 32 is opened and the limit switch 46 is turned off, the timer relay 48 is restored, the normally open relay contact 48a is turned off, the power supply to the plunger 44 is stopped, and the plunger 44 is restored to its initial position. For this reason, the sub-doors 32 of the four fire hydrant devices 10 corresponding to the fire occurrence location including the fire hydrant device 10 that has operated the transmitter 44 are sequentially opened. In this state, when the disaster prevention receiving panel 100 operates the fire hydrant valve opening / closing lever of the fire hydrant device 10 that has operated the transmitter 22 to the open position and receives a pump start signal by turning on the pump start interlock switch to perform pump start control of the fire extinguishing pump facility, the red indicator lights 34 of all the fire hydrant devices 10 blink. For this reason, the red indicator lights 34 of the four fire hydrant devices 10 corresponding to the fire occurrence location blink in a state facing the left side direction, ensuring high visibility when viewed by the driver of a vehicle traveling in the tunnel.

[0143] On the other hand, when the transmitter 22 is operated by another fire hydrant device, a control voltage is supplied from the disaster prevention receiving panel 100 to the second signal line 1120. The timer relay 48 operates when supplied with the control voltage from the second signal line 1120. When the set delay time has elapsed, the normally open relay contact 48a is turned on to activate the plunger 44 and open the sub-door 32. When the sub-door 32 is opened and the limit switch 46 is turned off, the timer relay 48 is restored and the normally open relay contact 48a is turned off, the power supply to the plunger 44 is stopped, and the plunger 44 is restored to its initial position. For this reason, similarly, the sub-doors 32 of the four fire hydrant devices 10 corresponding to the fire occurrence location are sequentially opened, and the red indicator lights 34 blink in a state facing the left side direction, ensuring high visibility when viewed by the driver of a vehicle traveling in the tunnel.

[0144] Also, when a fire is detected by any of the fire detectors 120 installed in the same section as the four fire hydrant devices 10 without operating the transmitter 22 in the four fire hydrant devices 10, as shown in FIG. 1, the disaster prevention receiving panel 100 that performs fire alarm control based on the reception of the fire detection signal from the fire detector 120 supplies a control voltage to the second signal line 1120.

[0145] Therefore, upon receiving the control voltage from the second signal line 1120, the timer relay 48 operates. When the set delay time elapses, the normally open relay contact 48a turns on and the plunger 44 is activated, thereby opening the sub-door 32. When the sub-door 32 is opened and the limit switch 46 turns off, the timer relay 48 is restored, the normally open relay contact 48a turns off, the energization of the plunger 44 stops, and the plunger 44 is restored to its initial position.

[0146] Accordingly, the sub-doors 32 of the four fire hydrant devices 10 belonging to the section where a fire is detected are sequentially opened. In this state, when the fire hydrant valve opening / closing lever of the fire hydrant device 10 corresponding to the fire occurrence location is operated to the open position and the pump start signal due to the turning on of the pump start interlock switch is received by the disaster prevention receiving board 100 and the pump start control of the fire extinguishing pump facility is performed, the red indicator lights 34 of all the fire hydrant devices 10 are controlled to blink. The red indicator light 34 of the opened sub-door 32 blinks in a state facing the left side direction, ensuring high visibility when viewed by the driver of a vehicle traveling in the tunnel.

[0147] When the opened sub-door 32 is to be restored after the fire has been extinguished, as shown in FIGS. 8 and 9(B), the opened sub-door 32 is pushed into the closed position, so that the locking portion 3210 of the sub-door 32 is pushed into and engaged with the locking receiving portion 4010 at the tip of the lock arm 40, enabling it to be held in the closed position.

[0148] (c5. Third Embodiment of Sub-Door Opening Control) Subsequently, a third embodiment of the sub-door opening control by the control unit of the display device will be described. In this description, refer to FIG. 12 showing the third embodiment of the control unit of the display device provided in the fire hydrant device together with the signal line from the disaster prevention receiving board, the transmitter, and the response lamp.

[0149] FIG. 12 shows the transmitters 22, the response lamps 24, and the control unit 45 for sub-door opening of two fire hydrant devices 10 connected to the same wiring from the disaster prevention receiving board. The control unit 45 performs control to activate the plunger 44 and open the sub-door 32 when a predetermined door opening condition is satisfied.

[0150] From the disaster prevention receiver panel 100, a first signal line 1110, a second signal line 1120, a third signal line 1130, and a common line 1140 are drawn out by a wiring cable 11.

[0151] The first signal line 1110 is a line to which the switch contact 2210 of the transmitter 22 provided in the fire hydrant device 10 is connected, and a predetermined driving voltage, for example, DC48V is constantly supplied. Therefore, when the switch contact 2210 is turned on by the operation of the transmitter 22, a line current flows from the signal line 1110 to the common line 1140, and a fire alarm signal is transmitted to the disaster prevention receiver panel 100. Note that, unlike the second embodiment shown in FIG. 11, the transmitter 22 of the present embodiment is a two - circuit transmitter having the same switch contacts 2210 and 2220 as those of the prior art, similar to the first embodiment shown in FIG. 10.

[0152] A response lamp 24 is connected to the second signal line 1120 and the common line 1140 via the interlocking switch contact 2220 of the transmitter 22. The control voltage is not supplied to the second signal line 1120 normally. The disaster prevention control panel 100 that performs fire alarm control based on the reception of a fire alarm signal by the operation of the transmitter 22 supplies a control voltage, for example, DC48V, to the second signal line 1120, and the response lamp 24 lights up on the condition that the interlocking switch contact 2220 of the transmitter 22 is on. On the other hand, in the fire hydrant device where the transmitter 22 is not operated, since the interlocking switch contact 2220 of the transmitter 22 is off, the response lamp 24 does not light up.

[0153] The third signal line 1130 is a newly provided signal line for activating the plunger 44 to open the sub - door 32. When the first door opening condition, the second door opening condition, and the third door opening condition are satisfied, a predetermined control voltage, for example, DC48V, is supplied from the disaster prevention receiver panel 100, and the opening control of the sub - door is performed.

[0154] When the first door opening condition, the second door opening condition, and the third door opening condition are satisfied, the control unit 45 connects a series circuit of a timer relay 48 and a limit switch 46 that functions as a door opening detector between a third signal line 1130 to which a control voltage of DC 48V is supplied and a common line 1140.

[0155] The timer relay 48 can set a delay time within, for example, one minute. When energized, when the set delay time has elapsed, the normally open relay contact 48a is turned on. The normally open relay contact 48a of the timer relay 48 has a plunger 44 connected in series between the third signal line 1130 and the common line 1140. When the timer relay 48 is energized, after the set delay time has elapsed, the normally open relay contact 48a is turned on to activate the plunger 44, and the sub-door 32 is opened.

[0156] The limit switch 46 connected in series with the timer relay 48 has a b contact and is on in the closed state of the sub-door 32. When the sub-door 32 is opened by energizing the plunger 44, the limit switch 46 turns off, and the timer relay 48 is de-energized.

[0157] The third signal line 1130 drawn from the disaster prevention receiving board 100 to the first-stage fire hydrant device 10 is connected to the third signal line 1130 of the second-stage fire hydrant device 10 via an interlocking limit switch 46a that becomes an a contact interlocked with the b contact of the limit switch 46. This also applies to the connection between the second-stage to third-stage fire hydrant devices and the third-stage to fourth-stage (final stage) fire hydrant devices 10 shown in FIG. 1.

[0158] Here, the "door opening condition" of the control unit 45 for supplying the control voltage DC48V from the disaster prevention receiver 100 to the third signal line 1130 is the following first to third door opening conditions. First, the "first door opening condition" is a condition that is established when the transmitter 22 of the fire hydrant device 10 is operated. When the switch contact 2210 is turned on by the operation of the transmitter 22 and a line current flows from the signal line 1110 to the common line 1140 and a fire alarm signal is received by the disaster prevention receiver 100, the disaster prevention receiver 100 that has performed fire alarm control based on the reception of the fire alarm signal supplies the control voltage DC48V to the third signal line 1130.

[0159] Also, the "second door opening condition" is a condition that is established when the transmitter 22 of another fire hydrant device 10 connected to the same wiring cable 11 from the disaster prevention receiver 100 is operated without the transmitter 22 being operated, as shown in FIG. 1. When the switch contact 2210 is turned on by the operation of the transmitter 22 of another fire hydrant device 10 and a line current flows from the signal line 1110 to the common line 1140 and a fire alarm signal is received by the disaster prevention receiver 100, the disaster prevention receiver 100 that has performed fire alarm control based on the reception of the fire alarm signal supplies the control voltage DC48V to the third signal line 1130.

[0160] Furthermore, the "third door opening condition" is a condition that is established when a fire is detected by any one of the eight or four fire detectors 120 provided at intervals of 25 meters or 50 meters in the installation section (for example, a 200-meter section) of the four fire hydrant devices 10 as shown in FIG. 1 and the fire is received by the disaster prevention receiver 100. The disaster prevention receiver 100 that has performed fire alarm control based on the reception of the fire detection signal from the fire detector 120 supplies the control voltage DC48V to the third signal line 1130.

[0161] Next, the opening control of the sub-door 32 according to the third embodiment of the control unit 45 will be described. In FIG. 12, for example, when the transmitter 22 of the first-stage fire hydrant device 10 is operated, the switch contact 2210 and the interlocking switch contact 2220 of the transmitter 22 turn on. When the switch contact 2210 turns on, a fire alarm signal is transmitted to the fire prevention receiving panel 100 via the first signal line 1110. The fire prevention receiving panel 100 that performs fire alarm control based on the reception of the fire alarm signal supplies a control voltage to the second signal line 1120. Therefore, the response lamp 24 lights up via the interlocking relay contact 2220 of the transmitter 22 that is on.

[0162] In addition, when the fire prevention receiving panel 100 receives a fire alarm signal due to the operation of the transmitter 22 and performs fire alarm control, it controls to supply a control voltage to the third signal line 1130, thereby establishing the "first door opening condition".

[0163] Therefore, the control voltage of the third signal line 1130 is supplied to the timer relay 48 of the first-stage fire hydrant device 10. At this time, since the sub-door 32 is held closed and the limit switch 46 is on, the timer relay 48 starts operating when energized. When the set delay time elapses, the normally open relay contact 48a turns on, and the plunger 44 is activated by energization to open the sub-door 32.

[0164] When the sub-door 32 opens and the limit switch 46 turns off, the timer relay 48 recovers, the normally open relay contact 48a turns off, the energization of the plunger 44 stops, and the plunger 44 is restored to the initial position.

[0165] In addition, when the sub-door 32 opens, the interlocking limit switch 46a turns on, and a control voltage is supplied to the third signal line 1130 of the second-stage fire hydrant device 10. The second-stage timer relay 48 starts operating. When the delay time elapses, the normally open relay contact 48a turns on, and the plunger 44 is activated to open the sub-door 32. When the sub-door 32 opens and the limit switch 46 turns off, the timer relay 48 recovers, the normally open relay contact 48a turns off, the energization of the plunger 44 stops, and the plunger 44 is restored to the initial position.

[0166] When the second-stage sub-door 32 is opened, the interlocking limit switch 46a is turned on, and a control voltage is supplied to the third signal line 1130 of the third-stage fire hydrant device 10. Similarly, the sub-door 32 is opened, and this is repeated up to the fourth-stage (final stage) fire hydrant device 10.

[0167] In addition, when the disaster prevention receiving panel 100 operates the transmitter 22 to operate the fire hydrant valve opening / closing lever of the fire hydrant device 10 to the open position and receives a pump start signal by turning on the pump start interlock switch to perform pump start control of the fire fighting pump facility, the red indicator lights 34 of all the fire hydrant devices 10 blink. For this reason, the red indicator lights 34 of the four fire hydrant devices 10 corresponding to the fire occurrence location blink in a state facing the left side direction, ensuring high visibility when viewed by the driver of a vehicle traveling in the tunnel.

[0168] On the other hand, when the operation of the transmitter 22 is performed on another fire hydrant device and the "second door opening condition" is satisfied, the disaster prevention receiving panel 100 that performs fire alarm control based on the reception of a fire alarm signal supplies a control voltage to the third signal line 1130. Similarly, control is performed to sequentially open the sub-doors 32 for each delay time toward the fire hydrant devices 10 from the first stage to the fourth stage.

[0169] Furthermore, as shown in FIG. 1, when a fire is detected by any of the fire detectors 120 installed in the same section as the four fire hydrant devices 10 and the "third door opening condition" is satisfied, the disaster prevention receiving panel 100 that performs fire alarm control based on the reception of a fire alarm signal from the fire detector 120 supplies a control voltage to the third signal line 1130. Similarly, control is performed to sequentially open the sub-doors 32 for each delay time toward the fire hydrant devices 10 from the first stage to the fourth stage.

[0170] In the third embodiment of the sub-door opening control, the delay time of the timer relay 48 may be set to zero. In this case, the timer relay 48 operates without delay by the supply of the control voltage to the third signal line 1130 to close the relay contact 48a, activates the plunger 44 to open the sub-door 32, and operates the timer relay 48 of the next-stage fire hydrant device when the interlocking limit switch 46a is turned on with the opening of the sub-door 32.

[0171] Here, although the delay time set for the timer relay is zero, the operation time including the time until the relay contact 48a is turned on by the operation of the timer relay 48 with a zero delay time, the time until the plunger 44 is activated when the relay contact 48a is turned on, and the time until the holding of the sub-door 32 is released and opened by the activation of the plunger 44 will function as the delay time for sequentially activating a plurality of fire hydrant devices. Also, when the delay time of the timer relay 48 is set to zero, it may be a normal relay without a delay setting function without using the timer relay 48.

[0172] [d. Dual-sided display device] Subsequently, the dual-sided display device will be described. In this description, reference is made to FIG. 13 showing the dual-sided red display device arranged on the front surface of the housing of the fire hydrant device, FIG. 14 showing the state where the sub-door of the dual-sided red display device is open, FIG. 15 showing a cross-section of the internal structure of the dual-sided red display as viewed from the plane, and FIG. 16 showing the dual-sided red display lamp taken out. Note that FIG. 15(A) shows the state where the sub-door is closed, and FIG. 15(B) shows the state where the sub-door is open. Also, FIG. 16(A) shows the front of the dual-sided red display lamp, and FIG. 16(B) shows the internal structure as viewed from the plane.

[0173] As shown in FIG. 13, the dual-sided display device 50 is arranged in the door cutout portion 1614 of the fire extinguisher door 18 on the upper side of the front surface of the housing near the left side surface 52 of the third housing 12c.

[0174] The double-sided display device 50 has a sub-door 32 arranged on the front of the housing so as to be horizontally openable about the left end, and a double-sided red display lamp 56 is provided at the center of the sub-door 32. Normally, the sub-door 32 is kept closed, and the front display surface 5610 of the double-sided red display lamp 56 faces forward.

[0175] When a fire breaks out in the tunnel and the user performs a fire alarm operation by pressing the transmitter 22 of the electrical equipment door 18 shown in FIG. 2, as shown in FIG. 14, the closed holding of the sub-door 32 is released, and the sub-door 32 opens horizontally and projects out at a substantially right angle to the front of the housing. In this open state, the front display surface 5610 of the double-sided red display lamp 56 faces the left side surface 52 of the third housing 12c, which can be seen by the driver of the vehicle traveling in the tunnel, ensuring high visibility when viewed from the driver traveling in the tunnel.

[0176] Also, the opposite surface of the front display surface 5610 of the double-sided red display lamp 56 is the back display surface 5612. When the sub-door 32 opens, the back display surface 5612 faces the vehicle traveling direction (right side surface direction), ensuring high visibility when the user views the fire hydrant device 10 in the left direction, which is opposite to the vehicle traveling direction.

[0177] FIGS. 15(A) and (B) show the internal structure of the double-sided display device 50. Except that the double-sided red display lamp 56 is provided on the sub-door 32, the internal structure and opening operation are the same as those of the display device 30 shown in FIG. 9, so the same reference numerals are used and the description is omitted.

[0178] FIG. 16 shows the double-sided red display lamp 56 taken out. A disc-shaped circuit board 5614 is arranged inside a thin cylindrical display cover 5613 made of red transparent acrylic resin or the like, and a plurality of LEDs 5616 that function as light emitting sources are arranged on both sides of the circuit board 5614. Since the double-sided red display lamp 56 is lit by receiving a supply of AC 100V from the disaster prevention receiver 100, a known AC type LED drive circuit is mounted on the circuit board 5614.

[0179] Also, when the sub-door 32 is closed as shown in FIG. 15(A) during normal times, the LED 5616 on the circuit board 5614 facing the front display surface 5610 is driven to emit light, and the LED 5616 on the circuit board 5614 facing the back display surface 5612 stops emitting light, resulting in single-sided light emission.

[0180] Also, when a fire breaks out and the sub-door 32 is opened as shown in FIG. 15(B), based on the detection of the opening of the sub-door 32, the LED 5016 on the circuit board 5614 facing the back display surface 5612 is also driven to emit light, resulting in double-sided light emission.

[0181] For example, when the control unit 45 detects that the sub-door 32 is closed due to the limit switch 46 being turned on, it controls the double-sided red indicator lamp 50 to emit single-sided light from the front display surface 5610, and when the limit switch 46 is turned off and the opening of the sub-door 32 is detected, it controls the double-sided red indicator lamp 50 to emit double-sided light from the front display surface 5610 and the back display surface 5612.

[0182] [e. Other Embodiments of the Fire Hydrant Device] Subsequently, other embodiments of the fire hydrant device will be described. In this description, refer to FIG. 17 which shows another embodiment of the fire hydrant device with the second housing arranged at the left end.

[0183] As shown in FIG. 17, the fire hydrant device 10 of this embodiment includes a first housing 12a serving as a storage part for storing fire hydrant equipment, a third housing 12c for storing a fire extinguisher 17, and a second housing 12b for storing predetermined electrical equipment including a transmitter 22, which are arranged side by side horizontally from the right side in the vehicle traveling direction to the left side in the opposite direction. It is different from the embodiment of FIG. 2 in that the second housing 12b and the third housing 12c are interchanged, and the second housing 12b is located at the left end. Therefore, above the auxiliary door 20 of the second housing 12b located at the left end, as a display device for indicating the installation location, for example, the display device 30 shown in FIGS. 1 to 9 is arranged.

[0184] In this embodiment, in order to secure an installation space for the display device 30 above the auxiliary door 20 provided on the front surface of the second housing 12b, the vertical width of the auxiliary door 20 is shortened accordingly. Here, since there is some margin in the arrangement space for the terminal boxes 28a and 28b in the second housing 12b that houses the electrical equipment including the transmitter 22, the arrangement positions of the terminal boxes 28a and 28b can be lowered, and the vertical width of the auxiliary door 20 can be shortened to easily secure a space for installing the display device 30 above. Thus, the display device 30 can be arranged without providing a door notch as in the fire extinguisher door 16 of FIG. 1.

[0185] Also, since the conventional red indicator lamp indicating the installation location was provided on the electrical equipment door 18 of the second housing 12b, it is reasonable to provide it on the second housing 12b where the display device 30 is arranged at the left end. Since other points are the same as those of the fire hydrant device 10 in FIG. 1, the same reference numerals are used and the description is omitted. Further, a double-sided display device 50 shown in FIGS. 13 to 16 may be provided on the second housing 12b arranged at the left end.

[0186] [f. Modification Example of the Present Invention] A modification example of the fire hydrant device and the disaster prevention system according to the present invention will be described. The fire hydrant device and the disaster prevention system of the present invention include the following modifications in addition to the above-described embodiment.

[0187] (Open Position of the Sub-Door) In the above-described embodiment, when a fire occurs, the sub-door of the display device opens to a position that projects substantially at a right angle to the front surface of the housing. However, the present invention is not limited to this, and the sub-door may open to a position at a predetermined inclination angle smaller than a right angle from the closed position with respect to the front surface of the housing. The inclination angle is, for example, 75°. When the sub-door opens at an inclination angle of 75°, the optical axis of the red indicator lamp is directed obliquely leftward at 15° with respect to the front surface, and the visibility for the driver of a vehicle traveling in the tunnel can be further enhanced.

[0188] (Sub-Door Opening Control) In the first embodiment of the above-described child door opening control, when a fire is received by the disaster prevention receiving panel, the blinking of the red indicator lights of all the fire hydrant devices is detected to open the child door. However, the present invention is not limited to this. When a fire is received by the disaster prevention receiving panel, control is performed to supply a control voltage from the disaster prevention receiving panel to the third signal line 1130 in FIG. 12 shown in the third embodiment of the child door opening control in order in terms of sections, so that control may be performed to open the child doors of all the fire hydrant devices in order.

[0189] (Fire hydrant device installed by wall-mounted structure) The above-described embodiment took, as an example, a fire hydrant device installed by a stationary structure in which the fire hydrant device is attached and fixed to a pedestal installed on the road surface of the supervisor passage. However, the present invention is not limited to this, and the present invention is similarly applicable to a fire hydrant device installed by a wall-mounted structure in which the fire hydrant device is attached and fixed to a pedestal installed on a tunnel wall surface.

[0190] (Housing of fire hydrant device) In the above-described embodiment, the electrical equipment is arranged in the second housing and the fire extinguisher is stored in the third housing. However, in the fire hydrant device of FIG. 1, the second housing and the third housing may be a single housing.

[0191] (Others) Further, the present invention includes appropriate modifications that do not impair its object and advantages, and is not limited by the numerical values shown in the above-described embodiments.

Explanation of reference numerals

[0192] 10: Fire hydrant device 11, 110: Wiring cable 1110: First signal line 1120: Second signal line 1130: Third signal line 12a: First housing 12b: Second housing 12c: Third housing 14: Fire hydrant door 1410, 1610: Door opening / closing handle 15: Maintenance door 16: Fire extinguisher door 1612: Peephole 1614: Door notch 17: Fire extinguisher 18: Electrical equipment door 20: Auxiliary door 22: Transmitter 2210: Switch contact 2220, 2230: Interlocking switch contact 24: Response lamp 25: Tunnel wall surface 26: Telephone jack 28a, 28b: Terminal box 30: Display device 32: Sub - door 34: Red indicator lamp 35: Display body 36, 42: Hinge 38: Leaf spring 40: Lock arm 44: Plunger 45: Control unit 46: Limit switch 46a: Interlocking limit switch 48: Timer relay 50: Double - sided display device 52: Left side surface 56: Double - sided red indicator lamp 5610: Front display surface 5612: Rear display surface 5613: Display cover 5614: Circuit board 5616: LED 60: Road 62: Main water supply pipe 64: Watchman passage 65: Stand 66: Water supply pipe 100: Disaster prevention receiving board 120: Fire detector

Claims

1. A fire hydrant device having a housing installed in close proximity to or in contact with a tunnel wall at a predetermined height above a road surface of a guard passage provided along the wall of a tunnel having a road, A fire hydrant device characterized in that a display device that displays red light to indicate the installation location is provided on a sub-door located at a predetermined position on the front of the housing, which opens sideways in the event of a fire.

2. The fire hydrant device according to claim 1, A fire hydrant device characterized in that the sub-door is located at the upper part of the front surface near one side facing the vehicle travel direction.

3. The fire hydrant device according to claim 1, The fire hydrant apparatus is characterized in that the sub-door is opened when a transmitter arranged on the front surface of the housing is operated.

4. The fire hydrant device according to claim 1, The child door has an opening actuation portion, The opening activation unit is A closed holding portion that holds the sub-door in a closed position; A biasing member that biases the sub-door in an opening direction; an actuation unit that releases the closed hold of the sub-door by the close hold unit and opens the sub-door by the biasing member; a control unit that activates the activation unit to open the sub-door when a predetermined door opening condition is satisfied; A fire hydrant device comprising:

5. The fire hydrant device according to claim 4, The display device is always on when power is supplied from the disaster prevention receiving panel via wiring, and when a fire is received by the disaster prevention receiving panel, the display device blinks by disconnecting the power supply from the wiring, This fire hydrant device is characterized in that when the control unit detects an interruption in the power supply from the wiring that flashes the display device as the door opening condition, it starts the start-up unit and opens the sub-door after a predetermined delay time different from that of other fire hydrant devices has elapsed.

6. The fire hydrant device according to claim 4, The transmitters and response lamps installed at each of the multiple fire hydrant devices installed in a specified section of the tunnel are connected to the same wiring from the disaster prevention receiving panel, The wiring is a first signal line to which the transmitter is connected and which transmits a fire notification signal to the disaster prevention receiving panel when the transmitter is operated; a second signal line to which the response lamp is connected, to which a control voltage is supplied when the fire notification signal is received via the first signal line, and to which the response lamp is turned on under the condition that the transmitter is being operated; a third signal line to which a predetermined drive voltage used for opening the child door is supplied; Including, The control unit sets the door opening condition as When the transmitter is operated and a first door opening condition is established in which the driving voltage is supplied to the starting unit from the third signal line, When a second door opening condition is established in which a control voltage is supplied to the starting unit from the second signal line in response to operation of a transmitter in another fire hydrant device, or When a third door opening condition is established in which a control voltage is constantly supplied to the starting unit from the second signal line in response to a fire detection by a fire detector provided in an installation section of the plurality of fire hydrant devices, A fire hydrant device characterized in that the starting unit is started and the sub-door is opened after a predetermined delay time different from that of other fire hydrant devices has elapsed.

7. The fire hydrant device according to claim 4, The transmitters and response lamps installed at each of the multiple fire hydrant devices installed in a specified section of the tunnel are connected to the same wiring from the disaster prevention receiving panel, The wiring is a first signal line to which the transmitter is connected and which transmits a fire notification signal to the disaster prevention receiving panel when the transmitter is operated; a second signal line to which the response lamp is connected, to which a control voltage is supplied from the disaster prevention receiving panel when the fire notification signal is received via the first signal line, and which turns on the response lamp on the condition that the transmitter is being operated; A third signal line to which a predetermined control voltage is supplied when the fire notification signal is received by the disaster prevention receiving panel through the first signal line and when a predetermined signal associated with a fire detection by a fire detector provided in an installation section of the plurality of fire hydrant devices is received by the disaster prevention receiving panel; Including, The control unit sets the door opening condition as When the transmitter is operated and a first door opening condition is satisfied in which a control voltage is supplied to the starting unit from the third signal line, When a second door opening condition is established in which a control voltage is supplied to the starting unit from the third signal line in response to operation of a transmitter in another fire hydrant device, or When a third door opening condition is established in which a control voltage is supplied to the starting unit from the third signal line in response to a fire detection by a fire detector provided in an installation section of the plurality of fire hydrant devices, A fire hydrant device characterized in that the starting unit is activated to open the sub-door.

8. The fire hydrant device according to claim 7, The plurality of fire hydrant devices are connected in sequence via an opening detection switch that closes when the sub-door is opened, and the third signal line is connected to the plurality of fire hydrant devices in sequence via an opening detection switch that closes when the sub-door is opened, The control unit is set with a predetermined delay time that is the same as that of other fire hydrant devices, and when the door opening condition is met, it starts the starting unit after the delay time has elapsed to open the sub-door, and when the open detection switch is closed, it supplies the control voltage to the third signal line of the next stage fire hydrant device to sequentially open the sub-doors.

9. The fire hydrant device according to any one of claims 1 to 8, The fire hydrant device is characterized in that the display device has a display surface that displays red on both the front and back of the sub-door.

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