JP7207964B2 - Tunnel fire hydrant system - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tunnel fire hydrant device that opens a forward tilting door by operating a door handle and draws out a hose with a nozzle to extinguish the fire.

Conventionally, a fire hydrant system is provided as emergency equipment for tunnels installed in tunnels such as highways and motorways. The fire hydrant system has a fire hydrant door that can be opened freely, and consists of a hose with a nozzle attached to the tip and a fire hydrant valve. Contains valves including

Fire hydrant devices are generally installed embedded in the tunnel wall at intervals of, for example, 50 meters along the tunnel side wall. They are installed to extinguish fires of a large scale and early stages.

Tunnel fire hydrants are very important equipment as an initial fire extinguishing means in road tunnels, and road administrators regularly inspect them and strive for maintenance.

However, after the road is put into service, there are time constraints, such as carrying out inspections while cars are passing, or implementing road regulations in conjunction with other facilities, or carrying out inspections when the road is closed to traffic. There are many issues regarding maintenance and management such as safety regulations.

Furthermore, in recent years, with the emergence of long urban tunnels, the required time for each fire hydrant multiplied by the number of installed fire hydrant systems may require daily inspections. It is becoming more difficult to achieve maintenance and improvement. In addition, it is certain that the declining birthrate and aging population will progress socially in the future, and in addition to the succession of technology, solving the problem of not being able to secure inspection personnel due to the lack of personnel is an urgent issue.

As a method for solving such problems, an inspection system for a tunnel fire hydrant device shown in Patent Document 1 has been proposed. In this inspection system, a motor-operated valve is provided in parallel with the fire hydrant valve, and a three-way switching motor-operated valve is provided on the secondary side of the automatic pressure regulating valve device following this. After switching the motor-operated valve from the water supply side to the hose to the drain side, the motor-operated valve parallel to the fire hydrant valve is opened to allow fire extinguishing water to flow to the drain side. We are checking whether the normal water discharge pressure can be obtained by the pressure regulating valve.

JP 2011-120717 A Japanese Patent Application Laid-Open No. 2001-246007

However, such conventional automatic inspections of fire hydrant systems mainly focus on inspections related to the water discharge function. It is also conceivable that the door latch mechanism for opening the door may malfunction.

The forward-tilting door installed in the tunnel fire hydrant system is held in a position to close the door opening on the front of the housing by a latch mechanism operated by the door handle. A link mechanism transmits the force to the latch arm to remove the tip of the arm from the latch hole on the housing side.

However, when a period of time elapses after the tunnel is put into service, dust and moisture enter and adhere to the movable part of the latch mechanism, which causes rust and the like to adhere, making it difficult for road users to use the fire hydrant system. Therefore, even if you try to pull the door handle, it will stick and will not move, and it is assumed that the fire hydrant device cannot be used.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tunnel fire hydrant device that automatically inspects a door latch mechanism that releases a forward tilting door from its closed state and opens it by operating a door handle, and maintains and manages the opening operation reliably. do.

(Tunnel fire hydrant system)
The present invention is a tunnel fire hydrant device in which a forward tilting door is provided in a door opening on the front surface of a housing so that it can be opened and closed,
a door engaging mechanism that holds the forward tilting door in the closed position and releases the forward tilting door from the closed position by operating the door handle;
a maintenance mechanism that performs a maintenance operation of releasing the closed holding of the forward tilting door by the door engaging mechanism and maintaining the closure of the forward tilting door by engaging with the forward tilting door;
characterized by comprising

(Structure of Door Engagement Mechanism and Maintenance Mechanism)
The door engaging mechanism is
a forward tilting door side door engaging portion provided on the forward tilting door side;
a housing-side door engaging portion provided on the housing side;
and holding the forward tilting door in the closed position by engaging the forward tilting door side door engaging portion and the housing side door engaging portion,
The maintenance mechanism
a forward tilting door side maintenance engaging portion provided in the forward tilting door side door engaging portion;
a housing-side maintenance engaging portion provided on the housing side;
with
The forward tilting door side maintenance engaging portion and the housing side maintenance engaging portion are separated when the forward tilting door is closed and no maintenance operation is performed, and when the maintenance operation is performed, the forward tilting door side maintenance engaging portion and the housing side maintenance engaging portion are engaged and engaged with each other when the maintenance operation is performed. By operating the maintenance engaging portion, the forward -tilting-door-side door engaging portion is operated via the forward-tilting- door-side maintenance engaging portion to disengage the forward -tilting- door-side door engaging portion and the housing-side door engaging portion. To release.

(Operation judgment of door latch mechanism by stress sensor)
a sensor that detects a release operation of the forward tilting door from being held closed by the door engaging mechanism;
a control unit that operates the maintenance mechanism to perform maintenance operation when an inspection instruction signal is received from the outside, and determines whether or not the door engagement mechanism operates normally based on the detection output of the sensor;
Prepare.

(Repeated operation of door latch mechanism by maintenance mechanism)
A control unit that operates a maintenance mechanism to perform maintenance operation when an inspection instruction signal is received from the outside ,
The control unit causes the maintenance mechanism to repeatedly operate the door latch mechanism prior to or after inspection.

(basic effect)
The present invention is a tunnel fire hydrant device in which a forward tilting door is openable and closable at a door opening on the front surface of a housing, the forward tilting door is held in a closed position, and a door handle is operated to hold the forward tilting door closed. and a maintenance operation to release the closed holding of the forward tilting door by the door engaging mechanism and to maintain the closure of the forward tilting door by engaging with the forward tilting door. mechanism, during regular inspections of the fire hydrant system, for example, the operation of the maintenance mechanism in response to an instruction from the disaster prevention receiver panel releases the forward-tilting door from being held closed by the door latch mechanism. It is possible to automatically check whether the door latch mechanism operated by the door handle operates normally or not. .

Further, it is also possible to release the fixation of the movable portion of the door latch mechanism by the movement of the door latch mechanism by the maintenance operation of the maintenance mechanism.

(Effect of door latch mechanism and maintenance mechanism)
Further, the door engaging mechanism includes a forward tilting door side door engaging portion provided on the forward tilting door side and a housing side door engaging portion provided on the housing side. and the housing-side door engaging portion engage with each other to hold the forward-tilting door in the closed position, and the maintenance mechanism includes a forward-tilting- door-side maintenance engaging portion provided in the forward -tilting-door-side door engaging portion and the housing a housing side maintenance engaging portion provided on the body side, the forward tilting door side maintenance engaging portion and the housing side maintenance engaging portion are separated when maintenance operation is not performed with the forward tilting door closed, When the maintenance operation is performed, it is engaged, and the forward tilting door side door engaging portion is operated via the forward tilting door side maintenance engaging portion by the operation of the housing side maintenance engaging portion, and the forward tilting door side door is operated. The engagement between the engaging portion and the housing-side door engaging portion is released, and the door engaging mechanism, for example, fixes the latch claw of the latch arm rotated by the shaft arranged behind the door handle to the housing side. a door latch mechanism that holds a forward tilting door in a closed position by engaging with a latch hole formed in the forward tilting door, a latch arm having a latch pawl constitutes a forward tilting door side door engaging portion, and the latch hole is on the housing side The maintenance mechanism, which constitutes the door engaging portion, includes a pinion gear fixed to the rotating shaft of the latch arm, a rack gear that engages and rotates the pinion gear through linear motion to release the latch arm from holding the forward tilting door closed, A linear actuator for reciprocatingly driving the rack gear, the pinion gear constitutes the forward tilting door side maintenance engaging portion, the rack gear and the linear actuator constitute the housing side maintenance engaging portion, and the rack gear is the forward tilting door . It is placed in the initial position away from the pinion gear in the closed state, and when an inspection instruction signal is received from the outside, the linear actuator advances the rack gear to engage and rotate the pinion gear, releasing the latch mechanism from holding the forward tilting door closed. For this reason, the door latch mechanism has a minimum of one movable portion, which makes it difficult for the movable portion to stick due to the occurrence of rust or the like when dust or moisture enters and adheres.

Further, the maintenance mechanism converts linear motion of the linear actuator into rotational motion by gear meshing with the pinion gear of the rack gear advanced and retracted by the linear actuator, and rotates the latch arm of the door latch mechanism in the direction of releasing the closing and holding. Therefore, the maintenance operation can be reliably performed.

Furthermore, even if the latch arm releases the closed holding of the forward tilting door by the rotation of the pinion gear due to the forward movement of the rack gear in the maintenance mechanism, the pinion gear provided on the forward tilting door side does not mesh with the rack gear provided on the housing side. Therefore, the forward tilting door is locked, and the forward tilting door is not opened even if the maintenance operation is performed.

In addition, since the rack gear is arranged in the initial position away from the pinion gear when the forward tilting door is closed, the maintenance mechanism is mechanically separated from the door latch mechanism when the forward tilting door is closed. Even if the door malfunctions, the door handle can be operated in the same manner as before to open the forward tilting door without being affected by the failure, ensuring high fail-safe performance.

(Effect of judging the operation of the door latch mechanism by the rotation sensor)
In addition, a sensor that detects the operation of releasing the closed hold of the forward tilting door by the door engaging mechanism, and when an inspection instruction signal is received from the outside, the maintenance mechanism is operated to perform maintenance operation, and the detection output of the sensor is used. a control unit that determines whether the door engaging mechanism operates normally; for example, the door engaging mechanism has a rotation sensor that detects rotation of the latch arm; In order to determine whether or not the door latch mechanism operates normally from the change in the detection value of the rotation sensor, the movement of the door latch mechanism due to the maintenance operation of the maintenance mechanism rotates, for example, a shaft provided with a pinion gear and a latch arm. Therefore, if the rotation of this shaft is detected by the rotation sensor, it can be determined as normal, and if the rotation is not detected, it can be determined as abnormal and necessary measures can be taken.

(Effect of repeated operation of the door latch mechanism by the maintenance mechanism)
A control unit that operates a maintenance mechanism to perform maintenance operation when an inspection instruction signal is received from the outside,
Prior to or after the maintenance operation of the maintenance mechanism, the control unit causes the maintenance mechanism to repeatedly operate the door latch mechanism. Even if it is difficult, in addition to the maintenance operation, the maintenance mechanism reciprocates the latch arm between the closed position and the closed position to restore the movement of the latch arm. To ensure that a forward tilting door can be reliably opened by the operation of .

Front view of fire hydrant system A plan view of the fire hydrant system with the forward tilting door open Side view of the fire hydrant system with the forward-tilting hydrant door open Explanatory drawing showing an embodiment of a door latch mechanism and a maintenance mechanism of a forward tilting door Explanatory drawing showing the door latch mechanism and maintenance mechanism Explanatory drawing showing the maintenance operation of the door latch mechanism by the maintenance mechanism Explanatory drawing showing the opening of the forward tilting door by the door handle Block diagram showing the control system provided in the maintenance mechanism Flowchart showing inspection control for a forward tilting door

[Overview of fire hydrant system]
FIG. 1 is a front view of the fire hydrant system, FIG. 2 is a plan view of the fire hydrant system with the forward tilting door opened, and FIG. 3 is a side view of the fire hydrant system with the forward tilting door opened.

As shown in FIGS. 1 to 3, the fire hydrant device 10 is provided with a forward tilting door 14 and a maintenance door 15 functioning as a fire hydrant door in a door opening 11 on the front right side of a device main body (housing) 12. The interior is a hose storage space and a valves storage space.

The forward-tilting door 14 is a forward-tilting opening/closing door. By inserting a hand into the door handle 16 above the hinge on the lower side of the door and pulling it forward, the forward-tilting door 14 can be opened as shown in FIG. It can be opened forward and downward.

Above the forward tilting door 14, a maintenance door 15 that opens and closes upward around the upper hinge is provided, and can be opened by opening the maintenance door 15 and lifting it upward during inspection.

A notification device door 18 is provided on the right side of a fire extinguisher door 26 provided at the left door opening of the device main body 12, and a push button notification device (transmitter) 20, a red indicator lamp 22 and a response lamp 24 are provided here. there is In the push-button notification device 20, a push-button switch is arranged behind a transparent protection plate, and when the protection plate is pushed in, the push-button switch is turned on, and a fire notification signal is transmitted to the disaster prevention receiving panel of the monitoring center to issue a fire alarm. output.

The red indicator light 22 is always lit so that the installation location of the fire hydrant device 10 can be seen from a distance. In the event of a fire, a push-button notification device 20 is pressed to transmit a fire notification signal to the disaster prevention receiver panel of the monitoring center to issue a fire alarm, along with which a response signal is sent from the disaster prevention receiver panel and the response lamp 24 blinks . .

A fire extinguisher door 26 is provided on the left side of the notification device door 18, and two fire extinguishers 28 are stored therein.

A hose 38 is wound inwardly and stored in a hose storage space formed behind the forward tilting door 14 of the device main body 12, and a fire hydrant nozzle 40 is attached to the tip of the hose 38, and the fire hydrant nozzle 40 is attached to the forward tilting door 14. is detachably held by a nozzle holder 42 arranged on the rear surface of the .

In the valves storage space located on the right side of the hose storage space, a water discharge valve system including a water supply valve 32 and a fire hydrant valve is installed in the piping system from the fire extinguishing pipe connection port 30 to which the pipe from the pump equipment is connected to the hose connection port. is provided.

The fire hydrant valve is provided with a fire hydrant valve opening/closing lever 36 arranged on the back side of the forward tilting door 14, and when the fire hydrant valve opening/closing lever 36 is operated, the fire hydrant valve is opened/closed via a parallel link wire mechanism.

[Door latch mechanism and maintenance mechanism for forward tilting door]
FIG. 4 is an explanatory diagram showing an embodiment of a door latch mechanism and a maintenance mechanism for a forward tilting door, and FIG. 5 is an explanatory diagram showing the door latch mechanism and maintenance mechanism taken out.

(door latch mechanism)
As shown in FIG. 4, the door latch mechanism of the forward tilting door 14 is composed of the door handle 16, the shaft 46, the latch arm 48 having the latch pawl 50 , and the latch hole 52 formed in the fixing plate 54. As shown in FIG.

The door handle 16 is housed in a handle case 16b having a front opening provided with a handle cover 16a. It is urged to close to the position shown by a coil spring provided on the shaft 46 (not shown).

A latch claw 50 is formed at the top of the latch arm 48 extending from the door handle 16, and the latch claw 50 is inserted into a latch hole 52 formed in a fixing plate 54 fixed to the door frame member 12a. , closing the forward tilting door 14 to the door opening 11 and holding it in the closed position against the rubber bush 70 .

(maintenance mechanism)
A maintenance mechanism is provided for the door latch mechanism. The maintenance mechanism is composed of a linear actuator 55 equipped with a linear motion motor 56 for advancing and retracting a screw shaft 58 , a rack gear 60 provided at the tip of the screw shaft 58 , and a pinion gear 62 fixed to the shaft 46 .

A direct-acting motor 56 of the linear actuator 55 is fixed to the door frame member 12a by a bolt 66 and a nut 68. As shown in FIG. The direct-acting motor 56 is, for example, a stepping motor, and horizontally advances or retreats a screw shaft 58 fitted in the rotor screw hole by rotating a rotor having a screw hole. Note that the linear actuator 55 includes an appropriate structure as long as it can move the rack gear 60 forward and backward.

A rack gear 60 is integrally formed at the tip of the screw shaft 58 and is arranged in a horizontal position so as to be meshable with a pinion gear 62 fixed to the shaft 46 of the latch arm 48 .

Further, the rack gear 60 is arranged at an initial position away from the pinion gear 62 in a state where the forward tilting door 14 is held closed. The operation of the forward tilting door 14 by operating the door handle 16 is not affected even if the maintenance mechanism is provided.

As shown in FIG. 5, the shaft 46 to which the pinion gear 62 is fixed is provided with a rotation sensor 64 that detects rotation of the shaft 46 and outputs a rotation detection signal. As the rotation sensor 64, an appropriate sensor such as a switch for detecting the rotation of the shaft 46 or a rotary encoder for outputting a pulse signal according to the amount of rotation can be used.

[Maintenance operation of the door latch mechanism]
FIG. 6 is an explanatory view showing the maintenance operation of the door latch mechanism by the maintenance mechanism. When inspecting the door latch mechanism provided on the forward tilting door 14, the screw shaft 58 is advanced by driving the linear motion motor 56 provided on the linear actuator 55, and the rack gear 60 is directed toward the pinion gear 62 accordingly. Carry out maintenance operation to advance.

When the tip of the rack gear 60 hits the pinion gear 62, gear meshing starts, and as the rack gear 60 advances, the pinion gear 62 rotates counterclockwise. The engagement by 50 with respect to latch hole 52 is released.

However, even if the latch claw 50 of the door latch mechanism releases the closed holding of the forward tilting door 14 by the maintenance operation of the maintenance mechanism, the pinion gear 62 on the forward tilting door 14 side is located on the side of the door frame member 12a which is on the apparatus main body 12 side. Since the door is locked by meshing with the rack gear 60, the door is not opened forward from the door opening 11, and only the maintenance operation of rotating the latch arm 48 to the unlocked position is performed.

When the latch arm 48 is rotated to the closing release position of the forward tilting door 14 by maintenance operation, the rotation of the shaft 46 at this time is detected by the rotation sensor 64, and when the rotation detection signal is obtained from the rotation sensor 64, , the door latch mechanism can be judged to be normal.

On the other hand, if dust or moisture enters and adheres to, for example, the shaft 46 of the door latch mechanism, rusting or the like occurs, and the shaft 46 rotates even if the maintenance operation is performed by the maintenance mechanism. Since the rotation detection signal is not obtained from the rotation sensor 64, the failure of the door latch mechanism is detected and notified.

[Opening operation by door handle]
FIG. 7 is an explanatory view showing opening of the forward tilting door by the door handle. When the forward tilting door 14 is held closed as shown in FIG. 5 and the hand is pulled under the door handle 16, the latch arm 48 is rotated counterclockwise about the shaft 46, and the latch claw is pulled. 50 is removed from the latch hole 52 to release the closed hold of the forward tilting door 14, and as shown in FIG. As shown in FIG. 3, the forward tilting door 14 begins to open.

Since the maintenance mechanism is mechanically separated at the initial position, the forward tilting door 14 can be opened by operating the door handle 16 without being affected by the maintenance mechanism. 14 can be opened.

[Inspection control operation]
FIG. 8 is a block diagram showing a control system provided in the maintenance mechanism. As shown in FIG. 8, a control unit 72 is provided for the maintenance mechanism that inspects the door latch mechanism provided in the fire hydrant device. The control unit 72 includes a control circuit unit using a computer circuit and a communication unit that performs wired communication. Communication by the communication unit may be wireless communication. A signal from the rotation sensor 64 is input to the control unit 72, and a signal is output to the linear actuator 55 having the direct-acting motor 56 for advancing and retracting the rack gear 60 shown in FIG. Further, a communication line is connected from a communication section provided in the control section 72 to a disaster prevention receiving panel installed in a tunnel monitoring room or the like.

When an inspection instruction signal is received from the disaster prevention receiving panel and an inspection instruction is given, the control unit 72 operates the maintenance mechanism by the linear actuator 55 to perform the maintenance operation of the door latch mechanism, and outputs the detection output of the rotation sensor 64. determines whether or not the door latch mechanism operates normally.

FIG. 9 is a time chart showing inspection control of the forward tilting door, which is the control operation by the control section 72 shown in FIG.

As shown in FIG. 9, when the control unit 72 determines reception of an inspection instruction signal from the disaster prevention receiving panel in step S1, the process proceeds to step S2, where the linear actuator 55 engages the latch arm engaged with the closed position of the door latch mechanism. 48 is driven to be opened.

Subsequently, when the control unit 72 determines that rotation has been detected from the detection signal of the rotation sensor 64 associated with the maintenance operation, the process proceeds to step S4, and an inspection normal signal indicating that the door latch mechanism operates normally is transmitted to the disaster prevention receiving panel. On the other hand, if the control unit 72 does not detect rotation from the detection signal of the rotation sensor 64 in step S3, the process proceeds to step S5, and an inspection abnormality signal indicating that the door latch mechanism is stuck due to rust or the like and does not move is output. Send to the disaster prevention receiver and output a fault alarm.

After transmitting the inspection result in step S4 or S5, the control unit 72 advances to step S6, reciprocates the linear actuator 55 a plurality of times to repeatedly operate the door latch mechanism, and reciprocally rotates the shaft 46 of the door latch mechanism. This makes it difficult for the shaft 46 to become stuck until the next inspection control is performed. The repetitive motion of the linear actuator 55 in step S6 may be performed before the inspection instruction is determined in step S1 and the maintenance motion is performed.

Subsequently, in step S7, the control unit 72 causes the linear actuator 55 to move the rack gear 60 away from the pinion gear 62 and return it to the initial position where it is mechanically separated as shown in FIG. It waits for the reception of the inspection instruction signal.

[Modification of the present invention]
(Detection of maintenance operation)
In the above-described embodiment, the rotation sensor 64 provided on the shaft 46 to which the latch arm 48 is fixed detects the movement of the door latch mechanism that has undergone maintenance operation by the maintenance mechanism to determine whether the inspection is normal or abnormal. A stress sensor such as a strain sensor is provided at the opening of the latch hole 52 with which the pawl 50 engages, and the movement of the door latch mechanism due to the maintenance operation of the maintenance mechanism is applied by the latch pawl 50 engaged with the latch hole 52, for example. The stress may be detected by a stress sensor, and if the stress detection value decreases, it may be determined that the inspection is normal, and if the stress detection value does not change, it may be determined that the inspection is abnormal, and necessary measures may be taken.

(others)
In the above-described embodiments, the engaging portion is a latch mechanism or a combination of a rack gear and a pinion gear. Any suitable form may be taken as long as it is a mechanism that maintains the closing of the tilting door.

For example, a worm gear and a worm wheel may be employed instead of the rack gear 60 and the pinion gear 62, and the worm gear may move forward toward the door while rotating to mesh with the worm wheel to operate the latch claw.

In addition, the latch arm 48 is extended to the lower side of the shaft 46, and a pressing member that presses the lower portion of the latch arm 48 is employed instead of the rack gear 60. When the pressing member advances toward the door, it contacts the lower portion of the latch arm 48. The latch arm 48 may be operated in the direction in which the latch pawl 50 opens by pressing it. In such a configuration, the forward tilting door 14 cannot be kept closed. Therefore, a locking portion for locking the forward tilting door and the housing is provided separately from the operation of the latch claw 50, which will be described later.

In addition, for example, during non-maintenance operation, the latch claw is in the retracted state, and during maintenance operation, the arm provided on the housing side is rotated by a predetermined angle to engage with the engaging portion provided on the door side. Apart from the operation of 50, a locking portion for locking the forward tilting door and the housing may be provided.

According to such a method, since the load of the forward tilting door is applied to the engaging portion, it is possible to perform the maintenance operation without applying the load of the forward tilting door to the engagement of the rack gear and the pinion gear.

Further, the door handle 16 and the pinion gear 62 may be configured to be movable to the left and right so that the meshing between the rack gear 60 and the pinion gear 62 can be forcibly released. Further, when employing the locking portion for locking the forward tilting door 14 and the housing 12, the structure may be such that the locking can be released when the meshing between the rack gear 60 and the pinion gear 62 is released. By adopting such a configuration, it is possible to forcibly release the locked state and open the forward tilting door when a fire occurs during maintenance operation and it is desired to open the forward tilting door.

Further, the forward tilting door opening mechanism of the present invention may be applied to remotely open a fire hydrant door near the site when a fire occurs.

Moreover, the present invention includes appropriate modifications that do not impair its purpose and advantages, and is not limited by the numerical values shown in the above embodiments.

10: Fire hydrant device 11: Door opening 12: Device body 14: Forward tilting door 15: Maintenance door 16: Door handle 16a: Handle cover 16b: Handle case 18: Reporting device door 20: Push button reporting device 22: Red indicator light
24 : Response lamp 26: Fire extinguisher door 28: Fire extinguisher 30: Fire extinguishing pipe connection port 32: Water supply valve 36: Fire hydrant valve opening/closing lever 38: Hose 40: Fire hydrant nozzle 42: Nozzle holder 46: Shaft 48: Latch arm 50: Latch Claw 52: Latch hole 54: Fixed plate 55: Linear actuator 56: Linear motor 58: Screw shaft 60: Rack gear 62: Pinion gear 64: Rotation sensor 70: Rubber bush 72: Control unit

Claims (4)

A tunnel fire hydrant device in which a forward tilting door is freely opened and closed at the door opening on the front of the housing,
a door engaging mechanism that holds the forward tilting door in a closed position and opens the forward tilting door by operating a door handle to release the closed hold of the forward tilting door;
a maintenance mechanism that performs a maintenance operation of releasing the closed holding of the forward tilting door by the door engaging mechanism and maintaining the closure of the forward tilting door by engaging with the forward tilting door;
A tunnel fire hydrant device comprising:
In the tunnel fire hydrant system according to claim 1,
The door engagement mechanism is
a forward tilting door side door engaging portion provided on the forward tilting door side;
a housing-side door engaging portion provided on the housing side;
and holding the forward tilting door in a closed position by engaging the forward tilting door side door engaging portion and the housing side door engaging portion,
The maintenance mechanism is
a forward tilting door side maintenance engaging portion provided in the forward tilting door side door engaging portion;
a housing-side maintenance engaging portion provided on the housing side;
with
The forward tilting door side maintenance engaging portion and the housing side maintenance engaging portion are separated when the forward tilting door is closed and the maintenance operation is not performed, and are engaged when the maintenance operation is performed. Then, the forward tilting door side door engaging portion is operated via the forward tilting door side maintenance engaging portion by the operation of the housing side maintenance engaging portion, and the forward tilting door side door engaging portion and the housing side are operated. A tunnel fire hydrant device characterized by releasing engagement with a door engaging portion.
In the tunnel fire hydrant system according to claim 1,
a sensor for detecting an operation of releasing the closed holding of the forward tilting door by the door engaging mechanism;
a control unit that operates the maintenance mechanism to perform the maintenance operation when an inspection instruction signal is received from the outside, and determines whether or not the door engagement mechanism operates normally based on the detection output of the sensor;
A tunnel fire hydrant device comprising:
In the tunnel fire hydrant system according to claim 1,
a control unit that operates the maintenance mechanism to perform the maintenance operation when an inspection instruction signal is received from the outside;
The tunnel fire hydrant apparatus, wherein the control unit causes the maintenance mechanism to repeatedly operate the door engaging mechanism prior to or after inspection.

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