JP2020081300A - Tunnel fire hydrant device - Google Patents

Abstract

To ensure an open operation even when an operational defect occurs in a door latch mechanism of an anteverted door, and allow a maintenance management by an automatic inspection of the door latch mechanism.SOLUTION: An anteverted door 14 provided on a door opening 11 of a front surface of a housing in a freely open/close manner is held at a close position by a door latch mechanism, and an operation of the door handle 16 releases a closed state to open the door. The door latch mechanism is provided with: a door open assist mechanism for releasing the latch of the anteverted door 16 to open the door; a contact sensor for detecting a touch operation of the door handle. When the touch operation of the door handle 16 is detected by the contact sensor, a control part rotates a press lever 62 by a linear actuator 55 of the door open assist mechanism to release the closed state by a latch member 50 to press and open the anteverted door 16. In an automatic inspection, the press lever 62 is operated in a range in which the anteverted door is not opened by the linear actuator 55 to judge whether the operation is normal or not.SELECTED DRAWING: Figure 4

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 pulls out a hose with a nozzle to extinguish a fire.

Conventionally, a fire hydrant device has been installed as an emergency equipment for tunnels installed in tunnels such as highways and automobile roads.The fire hydrant device is equipped with an open forward tilting door, a hose with a nozzle attached to the tip, and a fire hydrant valve. Contains the valves including.

The fire hydrant device is generally installed along the side wall of the tunnel at intervals of 50 meters, for example, and is embedded in the wall surface of the tunnel. It is assumed that a road user who is passing by at the time of a fire is the main operator. It is installed to extinguish large scale fires and early stage fires.

The tunnel fire hydrant is a very important facility as an initial fire extinguishing means in the road tunnel, and the road administrator regularly inspects it and works for maintenance.

However, after the road is put into service, time constraints such as conducting inspections while vehicles are passing, or conducting road inspections in conjunction with other facilities or conducting inspections when roads are closed, There are many issues in maintenance, such as safety regulations.

In addition, in recent years, with the advent of urban long tunnels, considering the minimum required time, which is the product of the inspection time for each fire hydrant and the number of units installed, it may be necessary to perform inspections on a daily basis. It is becoming more difficult to maintain and improve the environment. In addition, it is certain that the declining birthrate and the aging of society will progress in the future, and not only the succession of technology, but also the solution of the problem that the inspection personnel cannot be secured due to lack of personnel in the first place is an urgent issue.

As a method for solving such a problem, an inspection system for a tunnel fire hydrant device is proposed in Patent Document 1. In this inspection system, in addition to installing an electric valve in parallel with the fire hydrant valve, a three-way switching electric valve is installed on the secondary side of the automatic pressure regulating valve device that follows it. After switching the switching motorized valve from the water supply side to the hose to the drainage side, open the motorized valve in parallel with the fire hydrant valve and let the fire extinguishing water flow to the drainage side, and perform a water discharge test equivalent to discharging water from the hose with nozzle, Check whether the normal water discharge pressure can be obtained by the pressure regulator.

JP, 2011-120717, A JP 2001-246007 A

However, such conventional automatic inspection of the fire hydrant device is mainly performed on the inspection related to the water discharge function, but as a failure that occurs in the tunnel fire hydrant device, the latch of the forward tilting door is released by operating the door handle. The malfunction of the door latch mechanism to open the door can be considered.

The forward tilting door provided in the tunnel fire hydrant device is held at a position that closes the door opening on the front of the housing by a latch mechanism operated by the door handle, and the door latching mechanism prevents movement of the door handle. The front end of the forward-tilting door is opened by its own weight, with the lower side of the door as an axis, by transmitting to the latch arm by the link mechanism and removing the arm tip from the latch hole on the housing side.

However, after a certain period of time has passed since the start of operation of the tunnel, dust and moisture enter and adhere to the movable part of the latch mechanism, which causes rust and the like to stick and road users use the fire hydrant device. Therefore, it is assumed that the fire hydrant device cannot be used because the door handle is stuck and does not move even when trying to pull it.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a tunnel fire hydrant device that can be reliably opened even if a malfunction occurs in the door latch mechanism of a forward tilting door, and that allows maintenance management by automatic inspection of the door latch mechanism. To do.

(Tunnel fire hydrant device)
The present invention relates to a tunnel fire hydrant device in which a forward tilting door is provided in a door opening on a front surface of a housing so as to be freely opened and closed.
A door latch mechanism that holds the forward tilting door in the closed position and releases the closed holding of the front tilting door by operating the door handle to open it.
A door opening assist mechanism that releases the closed holding of the forward tilting door by the door latch mechanism and pushes the forward tilting door to open it.
A sensor that detects the operation of the door handle,
When the operation of the door handle is detected by the sensor, a control unit that operates the door opening assist mechanism to open the forward tilting door,
Is provided.

(Door latch mechanism and door assist mechanism 1)
The door latch mechanism is
A latch member provided on the door side so as to be slidably movable between a closed position that engages with the latch hole on the housing side and a close release position that is separated from the latch hole,
A link arm that is rotated by the opening operation of the door handle to slide the latch member from the closed position to the closed release position to release the closed holding of the forward tilting door,
Is provided,
The door opening assist mechanism is
A pressing lever extending from the link arm of the door latch mechanism,
A linear actuator that presses the pressing lever to rotate the link arm,
Equipped with
When the operation of the door handle is detected by the sensor, the control unit pushes the pressing lever with the linear actuator to rotate the link arm, thereby slidingly moving the latch member from the closed position to the closed release position to move the forward tilted door. Releasing the closed hold of and opening.

(Door latch mechanism and door assist mechanism 2)
The door latch mechanism is
Hold the forward tilting door in the closed position by engaging the latch claw at the tip of the latch arm that is rotated by the shaft arranged behind the door handle with the latch hole fixed to the housing side.
The door opening assist mechanism is
A pressing lever extended from the latch arm of the door latch mechanism,
A linear actuator that presses the pressing lever to rotate the latch arm,
Equipped with
When the touch operation of the door handle by the sensor is detected, the control unit pushes the pressing lever with the linear actuator to rotate the latch arm from the closed position to the close release position, thereby releasing the closed hold of the forward tilted door and opening it. Let

(Separation structure of door latch mechanism and door opening assist mechanism)
The linear actuator is arranged at an initial position apart from the pressing lever when the forward tilting door is closed.

(Handle operation detection by contact sensor)
As a sensor, a contact sensor that outputs a detection value according to the operation force of the person on the door handle is provided on the door handle,
The control unit determines the operation of the door handle and operates the door opening assist mechanism when the detection value from the contact sensor is equal to or larger than a predetermined value.

(Handle operation detection by multiple contact sensors)
As a sensor, multiple contact sensors that detect human contact with the door handle are provided,
The control unit determines the operation of the door handle and operates the door opening assist mechanism when the detection outputs are obtained from the plurality of contact sensors.

(Restoration of the door opening assist mechanism by opening the door)
When detecting the opening of the forward tilting door, the control unit returns the door opening assist mechanism to the initial position before the operation.

(Automatic inspection of door latch mechanism)
When the inspection is instructed, whether the door latch mechanism operates normally by performing an inspection operation to operate the door opening assist mechanism within a predetermined range where the door latch mechanism does not release the closed and held state of the forward tilting door. Determine whether or not.

(Operation judgment of door latch mechanism by rotation sensor)
The door latch mechanism is equipped with a rotation sensor that detects the rotation of the pressing lever to the closed release position.
The control unit determines whether or not the door latch mechanism operates normally based on the detection value from the rotation sensor when the door opening assist mechanism performs the inspection operation.

(Repeat operation of door latch mechanism by inspection mechanism)
The control unit causes the door opening assist mechanism to repeatedly operate the door latch mechanism before or after the checking operation by the door opening assist mechanism.

(Basic effect)
The present invention relates to a tunnel fire hydrant device in which a forward tilting door is openably and closably provided in a door opening on a front surface of a housing, the forward tilting door is held at a closed position, and the forward tilting door is held closed by operating a door handle. A door latch mechanism that releases and opens the door, a door opening assist mechanism that releases the closing and holding of the forward-tilting door by the door latch mechanism and pushes and opens the forward-tilting door, a sensor that detects the operation of the door handle, and a door by the sensor. When a touch operation on the handle is detected, a control unit that operates the door opening assist mechanism to open the forward-tilting door is provided, so that when a road user hands on the door handle to open the forward-tilting door, , This is detected by the sensor, the door opening assist mechanism operates, the closing and holding of the forward tilting door by the door latch mechanism is released, and the forward tilting door is pushed from the inside to be opened, and the artificial door handle is pulled. The forward tilting door can be automatically opened without requiring any operation, and after the tunnel has been in service, dust and moisture enter and adhere to the movable parts of the latch mechanism, which causes rust etc. Even if it occurs and sticks, the fire hydrant device can be used by surely opening the forward tilting door.

(Effect of door latch mechanism and door assist mechanism 1)
Further, the door latch mechanism includes a latch member provided on the door side so as to be slidably movable between a closed position that engages with a latch hole on the housing side and a closure release position that is separated from the latch hole, and an opening operation of a door handle. And a link arm that is slidably moved from the closed position to the closed release position to release the closed holding of the forward tilting door.
The door opening assist mechanism includes a pressing lever extending from the link arm of the door latch mechanism, and a linear actuator that presses the pressing lever to rotate the link arm. When the operation of the handle is detected, the pressing lever is pushed by the linear actuator to rotate the link arm, so that the latch member is slid from the closed position to the closed release position to release the closed holding of the forward tilting door. Since the door latch mechanism is opened, the number of moving parts is reduced by the latch member sliding and the link arm rotating by the shaft, and moving parts due to rust etc. when dust or moisture enters and adheres. It is hard to put the sticking of. Further, even if the door opening assist mechanism is provided, the forward-tilting door can be manually opened by operating the handle of the door latch mechanism, and fail-safe can be secured for the failure of the door opening assist mechanism.

In addition, even if rust or the like is generated on the movable part of the door latch mechanism, that is, the rotating shaft of the arm link or the sliding part of the latch member, the door opening assist mechanism is pushed by the linear actuator to push the door latch. By rotating the link arm of the mechanism in the latch releasing direction to move the latch member to the closing releasing position, the closed holding of the forward tilting door can be released.

In addition, when the door latch mechanism functions normally, the operation force of the person and the operation of the door opening assist mechanism release the closed and held state of the door latch mechanism, and the forward tilted door is pushed out, thereby The door handle is very light to operate, and high operability is obtained.

(Effect of door latch mechanism and door assist mechanism 2)
In addition, the door latch mechanism holds the forward-tilting door in the closed position by engaging the latch claw at the tip of the latch arm that is rotated by the shaft arranged behind the door handle with the latch hole fixed to the housing side. The door opening assist mechanism includes a pressing lever extending from the latch arm of the door latch mechanism, and a linear actuator that presses the pressing lever to rotate the latch arm. When an operation is detected, the linear actuator pushes the push lever to rotate the latch arm from the closed position to the closed release position to release the closed hold of the forward-tilting door and open it. The section is provided with a latch arm rotatably around the shaft, so that the number of movable sections is further reduced, and it is difficult to fix the movable section due to rust or the like when dust or moisture enters and adheres. Further, even if the door opening assist mechanism is provided, the forward-tilting door can be manually opened by operating the handle of the door latch mechanism, and fail-safe can be secured for the failure of the door opening assist mechanism.

In addition, the door opening assist mechanism latches the latch arm of the door latch mechanism by pushing the pressing lever with the linear actuator even if rust or the like occurs on the movable part of the door latch mechanism, that is, the rotation axis of the latch arm. By rotating the latch member to the closing release position by rotating it in the releasing direction, the closed holding of the forward tilting door can be released.

In addition, when the door latch mechanism functions normally, the operation force of the person and the operation of the door opening assist mechanism cause the door latch mechanism to be held closed or released, and then the forward tilted door is pushed out, thereby The door handle is very light to operate, and high operability is obtained.

(Separation structure of door latch mechanism and door opening assist mechanism)
Also, since the linear actuator is located at the initial position away from the pressing lever when the forward tilting door is closed, the door opening assist mechanism is mechanically separated from the door latch mechanism when the forward tilting door is closed. Even if the door opening assist mechanism fails, the door handle can be operated in the same manner as the conventional one to open the forward-tilting door without being affected by this, and high fail-safety can be secured.

(Effect of handle operation detection by contact sensor)
In addition, as a sensor, a contact sensor that outputs a detection value according to the contact force of the person on the door handle is provided, and the control unit determines the operation of the door handle when the detection value from the contact sensor is equal to or more than a predetermined value. Since the door opening assist mechanism is operated, it is possible to reliably detect the opening operation of the door handle by the road user and open the tilted door by the operation of the door opening assist mechanism. In addition, even if the door handle is touched by hand during inspection or the like, the forward-tilting door will not be accidentally opened by the door opening assist mechanism unless a force for pulling the door handle is applied.

(Effect of handle operation detection by multiple contact sensors)
In addition, a plurality of contact sensors that detect human contact with the door handle are provided as sensors, and the control unit determines the operation of the door handle and opens the door when the detection output is obtained from at least two contact sensors. Since the assist mechanism is operated, at least two contact sensors reliably detect an opening operation in which the road user puts his/her hand in the door handle and pulls it toward the front, and the door opening assist mechanism operates to move the door forward tilted. Can be opened. In addition, even if the door handle is touched by hand during inspection or the like, the forward door cannot be accidentally opened by the door opening assist mechanism unless the door handle is touched to open the door.

(Effect of restoration of the door opening assist mechanism by opening the door)
Further, when the control unit detects the opening of the forward-tilting door, the control unit resets the door-opening assist mechanism to the initial position before the operation. Therefore, the door-opening assist mechanism operates the door latch mechanism to open the forward-tilting door. When it is opened, it becomes an operating state in which the drive part of the linear actuator, for example, projects forward into the opened door opening, but by returning the initial tilted door to the initial position after opening, the hose with nozzle can be pulled out. Do not interfere with fire extinguishing work.

(Effect of automatic inspection of door latch mechanism)
Further, the control unit performs an inspection operation of operating the door opening assist mechanism within a predetermined range in which the door latch mechanism does not release the closing and holding of the forward tilting door when the inspection is instructed, and the door latch mechanism operates normally. Since it was decided whether or not to do so, in the periodic inspection of the fire hydrant device, for example, operate the door opening assist mechanism to the extent that the closing and holding of the forward tilted door by the door latch mechanism is not completely released by the instruction from the disaster prevention reception board. It is possible to automatically check whether or not it operates normally, and it is possible to know the state such as the sticking of the door latch mechanism due to the occurrence of rust etc. by inspection and take appropriate action.

In addition, it is possible to release the fixation of the movable portion in the door latch mechanism by the movement by the inspection operation of the door latch mechanism by the door opening assist mechanism.

(Effect of door latch mechanism operation judgment by rotation sensor)
In addition, the door latch mechanism is equipped with a rotation sensor that detects the rotation of the pressing lever to the unlocked position, and the control unit uses the detection value from the rotation sensor when the door opening assist mechanism performs the inspection operation. Since it is determined whether the door latch mechanism operates normally, the rotation sensor detects the movement of the pressing lever due to the inspection operation of the door opening assist mechanism. If is not detected, it can be determined that there is an abnormality due to sticking of the movable part, and necessary measures can be taken.

(Effect of repeated operation of door latch mechanism by door opening assist mechanism)
In addition, since the control unit operates the door latch mechanism repeatedly by the door opening assist mechanism before or after the inspection operation by the door opening assist mechanism, rust etc. occurs in the movable part of the door latch mechanism and it moves. Even if it is difficult, in addition to the inspection operation, the door latch mechanism reciprocates between the closed position and the release position to restore the movement of the movable part and operate the door handle until the next inspection. Therefore, it is possible to guarantee that the forward tilting door can be opened surely.

Front view of fire hydrant device The top view in the state which opened the front door of the fire hydrant device. Side view of the fire hydrant device with the forward tilting door open Explanatory drawing showing an embodiment of a door latch mechanism and a door opening assist mechanism of a forward tilting door Explanatory diagram showing the placement of the contact sensor by taking out the door handle Explanatory drawing showing the release operation of the closed holding of the door latch mechanism by the door opening assist mechanism Explanatory drawing showing opening of the forward-tilting door by pushing out the door opening assist mechanism Block diagram showing the control system of the door opening assist mechanism Flowchart showing door opening assist control for forward tilting door Explanatory drawing which showed other embodiment of the door latch mechanism of a front tilting door, and a door opening assistance mechanism. Explanatory drawing showing the release operation of the closing hold of the door latch mechanism by the door opening assist mechanism of FIG.

[Outline of fire hydrant device]
FIG. 1 is a front view of the fire hydrant device, FIG. 2 is a plan view of the fire hydrant device in a state where a front tilting door is opened, and FIG. 3 is a side view of the fire hydrant device in a state where the front tilting door is opened.

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

The forward-tilting door 14 is a front-closing type opening/closing door, and the front-tilting door 14 is opened as shown in FIG. 3 by putting a hand on the door handle 16 on the upper side around the hinge on the lower side of the door and pulling it toward you. It can be opened to the front lower side.

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

A notification device door 18 is provided on the right side of the fire extinguisher door 26 provided in the left side door opening of the device body 12, and a push button notification device (transmitter) 20 and a red indicator light 22 are provided therein. The push button notification device 20 has a push button switch arranged behind a transparent protective plate, and when the protective plate is pushed in, the push button switch is turned on, and a fire alarm signal is transmitted to the disaster prevention reception 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, the push button notification device 20 is pressed to send a fire notification signal to the disaster prevention reception panel of the monitoring center, and a fire alarm is issued. Along with this, a response signal is sent from the disaster prevention reception panel and the red indicator light 22 blinks. It Further, the response lamp 24 is turned on.

A fire extinguisher door 26 is provided on the left side of the notification device door 18, and two fire extinguisher 2 slides 8 are housed inside.

A water discharge hose 38 is internally wound and stored in a hose storage space formed behind the forward tilting door 14 of the apparatus body 12, and a fire hydrant nozzle 40 is attached to a tip of the water discharge hose 38, and the fire hydrant nozzle 40 is tilted forward. It is detachably held by a nozzle holder 42 arranged on the back surface of the door 14.

In the valve storage space arranged 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 provided in the piping system from the fire extinguisher piping connection port 30 to which the piping 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 the parallel link wire mechanism.

Further, as shown in FIG. 3, a door opening/closing sensor 44 using a limit switch or the like for detecting opening/closing of the forward tilting door 14 is provided in the apparatus body 12.

[Door latch mechanism and door opening assist mechanism for forward tilting doors]
FIG. 4 is an explanatory view showing an embodiment of a door latch mechanism and a door opening assist mechanism for a forward tilting door.

(Door latch mechanism)
As shown in FIG. 4, the door latch mechanism of the forward tilting door 14 includes the door handle 14, a shaft 45, a link arm 48, a latch member 50 having a latch claw 52, and a latch hole 54 formed in a fixed plate 53. To be done.

The door handle 16 is housed in a handle case 16b having a handle cover 16a at the front opening, and is rotatably provided by a shaft 45 on the base side of a link arm 48 integrally formed behind the door handle 16. ing.

A slide hole 47 is formed in the vertical direction behind the handle case 16b, a link arm 48 is housed in the slide hole 47 so as to be vertically movable, and a spring 49 is incorporated in the lower portion of the slide hole 47 to latch the latch. The member 50 is biased upward.

A link hole 46 is formed in the latch member 508, and a link arm 48 is passed through the link hole 46. A latch claw 52 is formed on the upper end of the latch member 50, and the latch claw 52 is engaged from below with a latch hole 54 formed in a fixing plate 53 fixed to the door frame member 12a side, so that the forward tilting door 14 is secured. It is closed in the door opening 11 and held in the closed position where it hits the rubber bush 70.

(Door opening assist mechanism)
A door opening assist mechanism is provided for the door latch mechanism. The door opening assist mechanism includes a linear actuator 55 having a linear motor 56 for moving the screw shaft 58 forward and backward, a plunger 60 provided at the tip of the screw shaft 58, and a pressing member extending downward from the link arm 48 and arranged downward. It is composed of a lever 62, a rotation sensor 64, and a contact sensor-72.

The linear motion motor 56 of the linear actuator 55 is fixed to the door frame member 12a by bolts 66 and nuts 68. The linear motor 56 is, for example, a stepping motor, and rotates a rotor having a screw hole to move the screw shaft 58 fitted in the rotor screw hole forward or backward in the horizontal direction. Incidentally, the linear actuator 55 includes an appropriate structure as long as it can move the plunger 60 forward and backward.

Further, the plunger 60 of the linear actuator 55 is arranged at the initial position apart from the pressing lever 62 in a state where the forward tilting door 14 is closed and held, whereby the door latch mechanism and the door opening assist mechanism are mechanically operated in a normal state. However, the operation of the forward tilting door 14 by operating the door handle 16 is not affected even if the door opening assist mechanism is provided.

A rotation sensor 64 using a limit switch is provided for the link arm 48 integrally formed with the pressing lever 62, and detects rotation of the pressing lever 62 by the plunger 60 of the linear actuator 55 to detect a rotation detection signal. Is output.

The contact sensor 72 is arranged on the back side of the door handle 16 and detects a contact of a finger when a road user operates the door handle 16 by pulling the handle case 16b from below with a hand. As the contact sensor 72, a pressure sensitive sensor whose resistance value changes due to a finger contact, a piezoelectric sensor which detects stress strain, or the like is used.

FIG. 5 is an explanatory view showing the arrangement of the contact sensor by taking out the door handle. FIG. 5A shows a case where a single contact sensor 72 is arranged on the back surface of the door handle 16. In this case, the detection value corresponding to the contact force of the road user who is trying to operate the door handle 16 is output, and when the detection value from the contact sensor 72 is equal to or more than a predetermined value, the operation of the door handle 16 is determined. Then, the door opening assist mechanism is operated.

FIG. 5B shows a case where a plurality of contact sensors 72 are arranged on the back surface of the door handle 16. In this case, when at least two contact sensors 72 detect the contact of a finger when a road user puts his/her hand on the door handle 16 and pulls it toward you, the operation of the door handle 16 is determined and the door is determined. Operates the opening assist mechanism.

Further, instead of the contact sensor 72, the door opening assist mechanism may be operated when the rotation sensor detects a slight movement of the link arm. Although it is necessary to move the link arm by operating the door handle 16 in order to operate the door opening assist mechanism, the structure can be simple.

[Door latch mechanism inspection operation]
FIG. 6 is an explanatory view showing the closing/holding release operation of the door latch mechanism by the door opening assist mechanism, and FIG. 7 is an explanatory diagram showing opening of the forward tilting door by pushing out the door opening assist mechanism.

When the forward tilting door 14 of the fire hydrant device 10 is opened, the road user puts his/her hand into the door handle 16 and pulls it toward you. At this time, the contact sensor 72 provided on the back side of the door handle 16 outputs a detection signal, and the control unit, which will be described later, discriminates the handle operation and drives the linear motion motor 56 provided on the linear actuator 55. Causes the screw shaft 58 to move forward, and accordingly the plunger 60 moves forward toward the pressing lever 62.

When the tip of the plunger 60 hits the pressing lever 62, the pressing lever 62 and the link lever 48 are integrally rotated in the clockwise direction about the shaft 45 in response to the pushing, and the link lever 48 is passed through the link hole 46. 50 is pushed down against the spring 49, the engagement of the front end of the latch member 50 with the latch hole 54 by the latch claw 52 is released, and the closed holding of the forward tilting door 16 is released.

Further, when the amount of movement of the linear actuator 55 to the plunger 55 reaches L1, the lower end of the rotated pressing lever 62 contacts the inside of the forward tilting door 14, and in this state, the linear actuator 55 further advances the plunger 62. Let For this reason, as shown in FIG. 7, the forward tilting door 14 is pushed forward by the amount of movement of the plunger 55 by the linear actuator 55 increasing to L2, and is opened downward as shown in FIG.

When the forward tilting door 14 is opened, the opening/closing of the forward tilting door 14 is detected by the door opening/closing sensor-44, and the control unit moves the forwardly pushed plunger 60 to the initial position shown in FIG. 4 as shown in FIG. The linear actuator 55 is operated so as to be returned so that the protrusion of the plunger 60 does not hinder the work of pulling out the hose.

[Opening operation by door handle]
When the door opening assist mechanism fails and does not operate, when the operation of putting the hand under the door handle 16 and pulling it toward the front with the forward tilting door 14 in the closed holding state shown in FIG. The link arm 48 rotates clockwise to pull down the latch member 50, and the latch claw 52 slips out of the latch hole 54, whereby the closed and held state of the forward tilting door 14 is released. By rotating the lower side of the door as an axis, the tilting door 14 can be opened as shown in FIG.

The opening of the forward tilting door 14 by the operation of the door handle 16 is performed because the door opening assist mechanism is mechanically separated at the initial position, that is, the device main body 12 is pressed against the pressing lever 62 on the forward tilting door 14 side. Since the plunger 60 of the linear actuator 55 on the side is separated at the initial position, the forward tilting door 14 can be opened by operating the door handle 16 without being affected by the door opening assist mechanism.

[Door opening assist control operation]
FIG. 8 is a block diagram showing a control system provided in the door opening assist mechanism. As shown in FIG. 8, a control unit 74 is provided in the door opening assist mechanism that assists the door latch mechanism provided in the fire hydrant device. The control unit 74 includes a communication unit that performs wired communication with a control circuit unit that uses a computer circuit. The communication by the communication unit may be wireless communication.

Signal lines from the contact sensor 72, the door opening/closing sensor 44, and the rotation sensor 64 are input to the control unit 74, and the linear actuator 55 including the linear motion motor 56 that moves the plunger 60 shown in FIG. A signal line is output to. Further, a communication line is connected from a communication unit provided in the control unit 74 to a disaster prevention reception board installed in a tunnel monitoring room or the like.

When the touch sensor 72 detects a touch operation on the door handle 16, the control unit 74 controls the linear actuator 55 of the door opening assist mechanism to open the forward tilting door 14.

Further, when the inspection instruction signal is received from the disaster prevention reception board, the control unit 74 performs an inspection operation of operating the door opening assist mechanism within a predetermined range that does not release the closed holding of the forward tilting door 14 by the door latch mechanism. , Perform an inspection operation to determine whether the door latch mechanism operates normally.

FIG. 9 is a time chart showing the door opening assist control of the forward tilting door, which is the control operation by the control unit 74 shown in FIG.

As shown in FIG. 9, when the control unit 74 determines in step S1 that there is a detection output of the contact sensor 72, the process proceeds to step S2, where a single unit is provided on the back side of the door handle 16 as shown in FIG. Taking the case where the contact sensor-72 is provided as an example, when it is determined that the detection value of the contact sensor-72 is equal to or greater than a predetermined threshold value, the operation of the door handle 16 is recognized and the process proceeds to step S3. The linear actuator 55 is used to drive the plunger 60 forward so as to open it.

In addition, as shown in FIG. 5B, when a plurality of contact sensors 72 are provided on the back side of the door handle 16, the control unit 74 detects from the two or more contact sensors 72 in step S2. When the output is obtained, the operation of the door handle 16 is recognized and the process proceeds to step S3.

The control unit 74, which has started the opening drive of the linear actuator 55 in step S3, proceeds to step S5 when determining that the door opening/closing sensor 44 has detected the opening of the forward tilting door 14 in step S4. The jar 60 is returned to the separated initial position.

Subsequently, when the control section 74 determines in step S6 that the inspection instruction signal is received from the disaster prevention reception board, the control section 74 proceeds to step S7, and within a predetermined range in which the linear actuator 55 does not release the closed and held state of the forward tilting door 17. An inspection operation for driving the linear actuator 55 to open is performed.

For example, the linear actuator 55 is a check that operates the linear actuator 55 so that the linear movement of the plunger 60 rotates the pressing lever 60 so as to pull down the latch member 50 within the range where the latch claw 52 does not come out of the latch hole 54. Take action.

Subsequently, in step S8, the control unit 72 reads the detection signal of the rotation sensor 64 associated with the inspection operation, and when the rotation detection signal is obtained and it is determined in step S9 that the operation is normal, the process proceeds to step S9, and the door latch mechanism is operated. An inspection normal signal indicating normal operation is transmitted to the disaster prevention reception board.

On the other hand, if the control unit 74 does not discriminate the rotation detection from the detection signal of the rotation sensor 64 in step S9, the door latch mechanism is inspected to indicate that the latch member 50 and the shaft 45 are fixed due to rust and do not move. It sends an abnormal signal to the disaster prevention reception board and outputs a failure alarm.

Subsequently, when the control unit 4 transmits the inspection result in step S10 or S11, the process proceeds to step S12, the linear actuator 55 is reciprocated a plurality of times to repeatedly operate the door latch mechanism, and the shaft 45 of the door latch mechanism is reciprocally rotated. At the same time, the latch member 50 is slid to facilitate movement, thereby making it difficult for the shaft 45 and the latch member 50 to be fixed before the next inspection control. The repetitive operation of the linear actuator 55 in step S12 may be performed before the inspection instruction is determined and the inspection operation is performed in step S6.

Subsequently, the control unit 72 causes the linear actuator 55 to return the plunger 60 to the initial position mechanically separated from the pressing lever 62, as shown in FIG. 4, and returns to step S1.

The rotation sensor 64 may be one that detects rotation of a predetermined angle or one that detects a rotation angle amount, but a sensor that detects a rotation angle amount is preferable. If the amount of rotation angle is detected, fine angle adjustment can be performed for each device, and it becomes easy to push the pressing lever 62 to the extent that it is not opened.

[Other Embodiments of Door Latch Mechanism and Door Opening Assist Mechanism for Front-tilting Door]
FIG. 10 is an explanatory view showing another embodiment of the door latch mechanism and the door opening assist mechanism of the forward tilting door, and FIG. 11 is an explanation showing the closing operation of the door latch mechanism by the door opening assist mechanism of FIG. It is a figure.

(Door latch mechanism)
As shown in FIG. 10, the door latch mechanism of this embodiment includes the door handle 14, a shaft 45, a latch arm 76 having a latch claw 78, and a latch hole 80 formed in the fixed plate 53.

The latch arm 76 extends from the back of the door handle 16 and has a latch claw 78 formed at the tip bent upward and is rotatably provided by a shaft 45 on the base side of the latch arm 76. It is held in the closed position by a spring (not shown) provided.

In the door latch mechanism of the present embodiment, the movable portion is only the rotating portion of the latch arm 76 by the shaft 45, and since there are fewer movable portions than the door latch mechanism of FIG. 4, dust and moisture enter and adhere, The structure is such that rust etc. occurs and it is hard to stick.

(Door opening assist mechanism)
A door opening assist mechanism is provided for the door latch mechanism. The door opening assist mechanism of the present embodiment extends downward from a linear actuator 55 equipped with a linear motion motor 56 that moves the screw shaft 58 forward and backward, a plunger 60 provided at the tip of the screw shaft 58, and a latch arm 76. The pressure lever 82, the rotation sensor 64, and the contact sensor 72 are arranged.

The door opening assist mechanism of the present embodiment is the same as the door opening assist mechanism shown in FIG. 4 except for the pressing lever 82 provided integrally with the latch arm 76, and therefore the same reference numerals are given and the description thereof will be omitted. Omit it.

(Assist operation of door latch mechanism)
When the controller 74 shown in FIG. 8 determines the operation of the door handle 16 based on the detection output of the contact sensor 72, as shown in FIG. 11, the linear actuator 55 advances the plunger 60 and the pressing lever 82 is pushed to latch it. The lever 76 is rotated clockwise, and the latch claw 78 is pulled out from the latch hole 80 to release the closed holding of the forward tilting door 14.

Subsequently, the control unit 74 further advances the plunger 60 by driving the linear actuator 55, pushes out the forward tilting door 14 whose closed and held state is released, and opens it, and the door opening/closing sensor 44 detects the opening of the forward tilting door 14. Then, the linear actuator 55 is returned to the initial position where the plunger 60 is separated from the pressing lever 62.

(Inspection control)
When the control unit 74 receives the inspection instruction signal from the disaster prevention reception board, the control unit 74 performs an inspection operation of driving the door latch mechanism to open in a predetermined range in which the closed holding of the forward tilting door 17 is not released by the linear actuator 55.

For example, the linear actuator 55 is a linear actuator in which the latch claw 78 does not come out of the latch hole 80 and the plunger 60 moves by the pressing lever 82 so that the latch arm 76 is rotated within a range in which the rotation sensor 64 is turned on. Perform an inspection operation to operate 55.
By this inspection operation, the control unit 72 transmits an inspection normal signal to the disaster prevention reception board when the rotation is discriminated from the detection signal of the rotation sensor 64, and when the rotation is not discriminated from the detection signal of the rotation sensor 64, when the rotation is discriminated. , Send an inspection error signal to the disaster prevention reception board and output a failure alarm.

When the inspection operation is completed, the controller 74 reciprocates the linear actuator 55 a plurality of times to repeatedly operate the door latch mechanism, and reciprocally rotates the latch arm 76 with respect to the shaft 45 to facilitate movement. The sticking of the shaft 45 is made difficult to occur before the inspection control is performed.

Finally, the controller 72 causes the linear actuator 55 to return the plunger 60 to the mechanically separated initial position away from the pressing lever 62, as shown in FIG.

[Modification of the present invention]
(Detection of inspection operation)
In the above-described embodiment, the movement of the door latch mechanism inspected by the door opening assist mechanism is performed by the rotation sensor 64 that detects the rotation of the pressing levers 62 and 82, but the latch claws 52 and 78 are engaged. A stress sensor such as a strain sensor is provided in the openings of the latch holes 54 and 80, and a stress applied by the latch claw 52 engaged with the latch hole 54 is generated by the movement of the door latch mechanism by the inspection operation of the door opening assist mechanism. The stress sensor may be used for detection, and if the stress detection value decreases, it may be determined that the inspection is normal, and if the stress detection value has not changed, it may be determined that the inspection is abnormal and appropriate measures may be taken.

(Other)
Further, the present invention includes appropriate modifications that do not impair the object and advantages thereof, and is not limited by the numerical values shown in the above embodiments.

10: Fire hydrant device 11: Door opening 12: Device body 14: Front tilting door 15: Maintenance door 16: Door handle 16a: Handle cover 16b: Handle case 18: Notification device door 20: Push button notification device 22: Red indicator light 24: Response lamp 25: Hinge 26: Fire extinguisher door 28: Fire extinguisher 30: Fire extinguisher piping connection port 32: Water supply valve 36: Fire hydrant valve opening/closing lever 38: Hose 40: Fire hydrant nozzle 42: Nozzle holder 44: Door open/close sensor-
46: Shaft 48: Link arm 50: Latch member 52, 78: Latch claw 53: Fixed plate 54, 80: Latch hole 55: Linear actuator 56: Linear motor 58: Screw shaft 60: Plunger 62, 82: Push lever 64: Rotation sensor 70: Rubber bush 72: Contact sensor 74: Controller 76: Latch arm

Claims (10)

In a tunnel fire hydrant device in which a forward tilting door is provided to be opened and closed at the door opening on the front of the housing,
A door latch mechanism that holds the forward tilting door in a closed position and releases the closed hold of the forward tilting door to open it by operating the door handle,
A door opening assist mechanism that releases the closed and held state of the forward tilting door by the door latch mechanism and pushes and opens the forward tilting door,
A sensor that detects the operation of the door handle,
When detecting the operation of the door handle by the sensor, a control unit that operates the door opening assist mechanism to open the forward tilting door,
A tunnel fire hydrant device characterized by being provided with.
In the tunnel fire hydrant device according to claim 1,
The door latch mechanism is
A latch member provided on the door side so as to be slidably movable between a closed position that engages with the latch hole on the housing side and a closed release position that is separated from the latch hole,
A link arm that is rotated by an opening operation of the door handle to slide the latch member from the closed position to the close release position to release the closed hold of the forward tilting door;
Is provided,
The door opening assist mechanism is
A pressing lever extended from the link arm of the door latch mechanism,
A linear actuator that presses the pressing lever to rotate the link arm,
Equipped with
When the control unit detects the operation of the door handle by the sensor, the linear actuator pushes the pressing lever to rotate the link arm to move the latch member from the closed position to the closed release position. A tunnel fire hydrant device characterized in that it is slid to and released to close and hold the forward tilting door.
In the tunnel fire hydrant device according to claim 1,
The door latch mechanism is
Holding the forward-tilting door in the closed position by engaging a latch claw at the tip of a latch arm that is rotated by a shaft arranged behind the door handle with a latch hole fixed to the housing side,
The door opening assist mechanism is
A pressing lever extending from the latch arm of the door latch mechanism,
A linear actuator that presses the pressing lever to rotate the latch arm,
Equipped with
When the operation of the door handle by the sensor is detected, the control unit pushes the pressing lever by the linear actuator to rotate the latch arm from the closed position to the closed release position to move the forward tilting door. A tunnel fire hydrant device characterized by releasing closed retention.
In the tunnel fire hydrant device according to claim 2 or 3,
The tunnel fire hydrant device, wherein the linear actuator is arranged at an initial position apart from the door pressing lever when the forward tilting door is closed.
In the tunnel fire hydrant device according to claim 1,
As the sensor, a contact sensor that outputs a detection value according to a manipulating force on the door handle is provided on the door handle,
The tunnel fire hydrant device, wherein the control unit determines the operation of the door handle and operates the door opening assist mechanism when the detected value from the contact sensor is equal to or more than a predetermined value.
In the tunnel fire hydrant device according to claim 1,
As the sensor, a plurality of contact sensors for detecting contact of a person with respect to the door handle are provided,
The tunnel fire hydrant device, wherein the control unit determines the operation of the door handle and operates the door opening assist mechanism when detection outputs are obtained from the plurality of contact sensors.
2. The tunnel fire hydrant device according to claim 1, wherein the control unit returns the door opening assist mechanism to the initial position before the operation when the opening of the forward tilting door is detected. ..
In the tunnel fire hydrant device according to claim 1,
When an inspection is instructed, the control section performs an inspection operation of operating the door opening assist mechanism within a predetermined range that does not release the closing and holding of the forward tilting door by the door latch mechanism, and the door latch mechanism operates normally. A tunnel fire hydrant device characterized by determining whether or not it operates.
In the tunnel fire hydrant device according to claim 8,
The door latch mechanism is provided with a rotation sensor that detects rotation of the pressing lever to the door open position,
A tunnel fire hydrant characterized in that the control unit determines whether or not the door latch mechanism operates normally from a change in the detection value from the rotation sensor when an inspection operation is performed by the door opening assist mechanism. apparatus.
In the tunnel fire hydrant device according to claim 8,
The tunnel fire hydrant device, wherein the control unit repeatedly operates the door latch mechanism by the door opening assist mechanism before or after the inspection operation by the door opening assist mechanism.

Images