Hydrant device

Abstract

To make it possible to perform fire fighting quickly and appropriately by associating operation of a transmitter with opening of a hydrant door.SOLUTION: A door opening mechanism outputs a fire notification signal by a transmitter operating device 66 integrally provided by pressing operation of a transmitter, generates control oil pressure, and supplies it to a gas spring 60 provided at a hydrant door 16 via a hydraulic pipe 70. The gas spring 60 is locked at an initial position where no control oil pressure is received, holds the hydrant door 16 at a closed position, is unlocked when the control oil pressure is supplied from the transmitter operating device 66, and is opened at an opening position. The hydrant door 16 is provided with a door handle operating device 68 to unlock the gas spring 60 by the control oil pressure generated by the pressing operation, thereby opening the hydrant door 16.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a fire hydrant device that stores a fire hose, a fire extinguisher, etc. and is installed in a tunnel. [Background technology]

[0002] Conventionally, fire hydrant systems have been installed as emergency tunnel equipment in tunnels such as expressways and expressways. A fire hydrant system consists of a housing with a hydrant door, a fire hose with a nozzle attached to the end, and valves including a hydrant valve, housed in a fire hydrant housing section, and a fire extinguisher housing section with a fire extinguisher door, which houses, for example, two fire extinguishers. Furthermore, fire hydrant systems are generally installed in recesses in the tunnel wall along the length of the tunnel, for example, at intervals of 50 meters.

[0003] The fire hydrant device is also equipped with an emergency notification device, which is equipped with a red indicator light, a transmitter, a response lamp, and a telephone jack on the notification device door (electrical door) located between the fire hydrant storage section and the fire extinguisher storage section.

[0004] The red indicator light stays on at all times, allowing the location of the fire hydrant device to be confirmed from a distance. When a fire breaks out and the transmitter is pressed to turn on the push button switch, a fire notification signal is sent to a disaster prevention receiving panel installed in an electrical room or the like, and a fire alarm is output. The disaster prevention receiving panel that has output the fire alarm sends a response signal to the emergency notification device, causing the red indicator light to flash and the response lamp to light up, making it possible to confirm that the fire notification signal has been received on the disaster prevention receiving panel side (Patent Document 1).

[0005] In addition, the disaster prevention receiving panel that receives the fire notification signal sends a start signal to the fire pump, and a pump start confirmation signal causes the red indicator lights of all fire hydrant devices to flash simultaneously, thereby notifying everyone in the tunnel where the fire hydrant devices are installed that the pumps have started, and also starts pressurizing the supply of fire water to the fire hoses stored in the fire hydrant devices.

[0006] Furthermore, because road users are generally unfamiliar with operating fire hydrant devices, when a road user opens the hydrant door of a fire hydrant device, an instruction manual showing how to operate the device is visible using pictures and text. However, in an emergency situation such as a fire outbreak, it can be difficult to operate the fire hydrant device while reading the instruction manual, so fire hydrant devices have been proposed that provide instructions on how to operate the device using displays and audio (Patent Documents 2 and 3). [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2002-102380 [Patent Document 2] Japanese Patent Application Laid-Open No. 2003-310785 [Patent Document 3] Japanese Patent Application Publication No. 2019-118423 Summary of the Invention [Problem to be solved by the invention]

[0008] Incidentally, if a vehicle fire occurs in a tunnel due to an accident or the like, road users will operate a transmitter to report the fire, and then use a fire hydrant or fire extinguisher to put out the fire.

[0009] However, in an emergency situation such as a fire, some road users may use fire hydrants or fire extinguishers to extinguish the fire without operating a transmitter to report the fire. If the transmitter is not operated, the disaster prevention receiving panel will not issue a fire alarm, and the road administrator will not be notified of the fire. Furthermore, when the disaster prevention receiving panel receives both a fire signal from the fire detectors installed at 25-meter or 50-meter intervals along the length of the tunnel and a fire report signal from the transmitter, it may activate other emergency equipment. For example, if a no-entry warning sign is installed at the tunnel entrance, the no-entry warning sign may be activated by the transmitter alone. Therefore, if the transmitter is not operated, the other emergency equipment will not be activated, which could seriously hinder operation and management in the event of a fire.

[0010] In addition, there are occasional cases where road users do not operate the fire hydrant device after pressing the transmitter, resulting in the hydrant not being used. As a solution to this problem, it has been proposed to provide voice guidance, but it is expected that in the tense situation of a fire, the operation of the fire hydrant device will not necessarily be carried out in accordance with the voice guidance.

[0011] The present invention aims to provide a fire hydrant device that enables firefighting activities to be carried out quickly and appropriately by coordinating the operation of a transmitter with the opening of a fire hydrant door. [Means for solving the problem]

[0012] (Fire hydrant equipment) The present invention provides A transmitter that activates a switch by pressing it and transmits a fire notification signal to a disaster prevention receiving panel; a fire hydrant door that is provided so as to be freely opened and closed at an opening of a housing that houses a predetermined fire hydrant device including a fire hose with a nozzle attached; A fire hydrant device installed in a tunnel, comprising: It is characterized by being equipped with a door opening mechanism that opens the fire hydrant door in conjunction with pressing the transmitter.

[0013] (Door opening mechanism 1) The door opening mechanism is a transmitter operating device provided with a hydraulic pressure generating unit that mechanically generates control hydraulic pressure by pressing the transmitter; a gas spring provided in the housing, which holds the fire hydrant door in a closed position in a contracted initial position, and which releases the holding of the fire hydrant door in the closed position and expands to open the door to an open position when it receives control oil pressure from the transmitter operating device; Equipped with.

[0014] (Transmitter operating device 1) The transmitter operating device 1 is a case body that is a predetermined cylindrical body and is operated from one end side, and the switch is disposed inside the other end side; a pressing operation unit that is housed in the case body and is movable to one end side thereof and that can be pressed from outside the one end side of the case body at an initial position; a hydraulic pressure generating unit having a piston slidably mounted in a cylinder disposed in the case body and continuing from the pressing operation unit to the other end side, the hydraulic pressure generating unit generating a control hydraulic pressure by movement of the piston due to pressing operation of the pressing operation unit; a piston rod extending from the piston to the opposite side of the pressing operation unit; a spring member that is housed in the case body and continues from the hydraulic pressure generating unit to the other end side, and that holds the piston rod and the pressing operation unit in their initial positions; Equipped with The switch is activated by the pressure of the piston rod when the pressing operation portion is pressed and the piston moves against the spring member.

[0015] (Non-lock switch) The switch of the transmitter operating device 1 is a non-locking switch that closes the contact when pressed and opens the contact when not pressed, The transmitter operating device 1 further includes a rotation holding mechanism that, when the pressing operation part is pressed while the device is in the initial position, rotates the piston rod and moves it toward the other end to close the contacts of the non-lock switch and hold it in a predetermined position where control oil pressure is generated, and when the pressing operation part is pressed while the piston rod is held in the predetermined position, releases the holding of the piston rod and rotates it to the initial position to open the contacts of the non-lock switch and release the generation of control oil pressure.

[0016] (Rotational holding mechanism) The rotation holding mechanism of the transmitter operating device 1 is a guide slot formed in an outer wall of the case body at a predetermined inclination angle with respect to the axial direction, which is the direction of movement of the piston rod, and having an engagement groove formed at a predetermined position where the contact of the non-locking switch is closed and control oil pressure is generated; a guide pin that stands on the outer periphery of the piston rod in accordance with the position of the guide slot, moves along the guide slot to rotate the piston rod in the axial direction, and is engaged and held in the engaging groove; Equipped with The spring member applies a rotational restoring force to the piston rod, which is held in place by the guide pin engaging with the engaging groove of the guide slot, and when the guide pin is released from the engagement by pressing the pressing operating part, the rotational restoring force moves the piston rod to its initial position.

[0017] (Transmitter operating device 2) The transmitter operating device 2 is a case body that is a predetermined cylindrical body and is operated from one end side and has a switch disposed inside the other end side; a pressing operation unit that is housed in a cylindrical case body and is movable to one end side of the case body and can be pressed from outside the one end side of the case body at an initial position; a pressing rod extending from the pressing operation portion toward the pressing direction; a hydraulic pressure generating unit in which a piston is slidably provided on a cylinder and a pressing rod arranged in the case main body continuing from the pressing operation unit to the other end side, and a first spring member is arranged between the piston and the pressing operation unit, and the first spring member is compressed by moving the pressing rod due to a pressing operation of the pressing operation unit, and then the piston is moved by extending the first spring member to generate a control hydraulic pressure; a second spring member that is housed in the case body and continues from the hydraulic pressure generating unit to the other end side, and that holds the pressing rod and the pressing operation unit in their initial positions; Equipped with The switch is activated by the pressure of the pressing rod when the pressing operation portion is pressed and the pressing rod moves against the second spring member.

[0018] (Non-lock switch of transmitter operating device 2) The switch of the transmitter operating device 2 is a non-locking switch that closes the contact when pressed and opens the contact when not pressed, The second transmitter operating device further includes a rotational holding mechanism that, when the pressing operation unit is pressed while in the initial position, rotates and moves the pressing rod toward the other end to close the contacts of the non-lock switch and compress the first spring member to hold it in a predetermined position where it generates control hydraulic pressure, and when the pressing operation unit is pressed while the pressing rod is held in the predetermined position, releases the holding of the pressing rod and rotates it to the initial position to open the contacts of the non-lock switch and release the generation of control hydraulic pressure.

[0019] (Rotational holding mechanism for transmitter operating device 2) The rotation holding mechanism of the transmitter operating device 2 is a guide slot formed on the outer wall of the case body at a predetermined inclination angle with respect to the axial direction, which is the direction of movement of the pressing rod, and having a locking groove formed at a predetermined position where the contact of the non-locking switch is closed and control oil pressure is generated; a guide pin that stands on the outer periphery of the pressing rod in accordance with the position of the guide slot, moves along the guide slot to rotate the pressing rod in the axial direction, and is engaged and held in the engaging groove; Equipped with The second spring member applies a rotational restoring force to the pressing rod, which is held in place by the guide pin engaging with the locking groove of the guide slot, and when the guide pin is released from its locking position as a result of pressing the pressing operation unit, the rotational restoring force moves the pressing rod to its initial position.

[0020] (Door handle door operating device) The door handle of the fire hydrant door is equipped with a door handle operating device that generates controlled hydraulic pressure when pressed and supplies it to the gas spring.

[0021] (Door handle operating device 1) The door handle operating device 1 is a pressing operation unit that is housed in a predetermined cylindrical case body and is movable to one end side thereof and can be pressed from outside the one end side of the case body at an initial position; a hydraulic pressure generating unit having a piston slidably mounted in a cylinder disposed in the case body and continuing from the pressing operation unit to the other end side, the hydraulic pressure generating unit generating a control hydraulic pressure by movement of the piston due to pressing operation of the pressing operation unit; a piston rod extending from the piston to the opposite side of the pressing operation unit; a spring member that is housed in the case body and continues from the hydraulic pressure generating unit to the other end side, and that holds the piston rod and the pressing operation unit in their initial positions; Equipped with.

[0022] (Rotation holding mechanism for door handle operating device 1) The door handle operating device 1 further includes a rotation holding mechanism that, when the pressing operation unit is pressed while the piston rod is in the initial position, rotates and moves the piston rod toward the other end to hold it in a predetermined position where control hydraulic pressure is generated, and when the pressing operation unit is pressed while the piston rod is held in the predetermined position, releases the hold on the piston rod and rotates and moves it to the initial position to release the generation of control hydraulic pressure.

[0023] (Configuration of rotation holding mechanism of door handle operating device 1) The rotation holding mechanism of the door handle operating device 1 is a guide slot formed in an outer wall of the case body at a predetermined inclination angle with respect to an axial direction which is the moving direction of the piston rod, the guide slot having an engagement groove formed at a predetermined position where control hydraulic pressure is generated; a guide pin that stands on the outer periphery of the piston rod in accordance with the position of the guide slot, moves along the guide slot to rotate the piston rod in the axial direction, and is engaged and held in the engaging groove; Equipped with The spring member applies a rotational restoring force to the piston rod, which is held in place by the guide pin engaging the locking groove of the guide slot, and when the guide pin is released by pressing the pressing operating part, the rotational restoring force moves the piston rod to its initial position.

[0024] (Door handle operating device 2) The door handle operating device 2 is a pressing operation unit that is housed in a predetermined cylindrical case body and is movable to one end side thereof and can be pressed from outside the one end side of the case body at an initial position; a pressing rod extending from the pressing operation portion toward the pressing direction; a hydraulic pressure generating unit in which a piston is slidably provided on a cylinder and a pressing rod arranged in the case main body continuing from the pressing operation unit to the other end side, and a first spring member is arranged between the piston and the pressing operation unit, and the first spring member is compressed by moving the pressing rod due to a pressing operation of the pressing operation unit, and then the piston is moved by extending the first spring member to generate a control hydraulic pressure; a second spring member that is housed in the case body and continues from the hydraulic pressure generating unit to the other end side, and that holds the pressing rod and the pressing operation unit in their initial positions; Equipped with.

[0025] (Rotation holding mechanism for door handle operating device 2) The door handle operating device 2 further includes a rotation holding mechanism that, when the pressing operation unit is pressed while in the initial position, compresses the first spring member and holds it in a predetermined position to generate control hydraulic pressure, and when the pressing operation unit is pressed while the pressing rod is held in the predetermined position, releases the holding of the pressing rod and rotates it to the initial position to release the generation of control hydraulic pressure.

[0026] (Configuration of door handle operating device 2-rotation holding mechanism) The rotation holding mechanism of the door handle operating device 2 is a guide slot formed in an outer wall of the case body at a predetermined inclination angle with respect to an axial direction which is the moving direction of the pressing rod, the guide slot having an engagement groove formed at a predetermined position where control oil pressure is generated; a guide pin that stands on the outer periphery of the pressing rod in correspondence with the position of the guide slot, moves along the guide slot to rotate the piston rod in the axial direction, and is engaged and held in the engaging groove; Equipped with The second spring member applies a rotational restoring force to the pressing rod, which is held in place by the guide pin engaging with the locking groove of the guide slot, and when the guide pin is released from its locking position as a result of pressing the pressing operation unit, the rotational restoring force moves the pressing rod to its initial position.

[0027] (Hydraulic pressure generating unit electrically driven by transmitter operation) The door opening mechanism is a control oil pressure generating device that is electrically driven by pressing the transmitter to generate a control oil pressure; a gas spring that is provided in the housing and that holds the fire hydrant door in a closed position in a contracted initial position, and that, when supplied with control hydraulic pressure from the hydraulic pressure generating device, releases the holding of the fire hydrant door in the closed position and expands to open the fire hydrant door to an open position; Equipped with.

[0028] (Hydraulic pressure generating unit electrically driven by the door handle operating device) The door handle of the fire hydrant door is equipped with a door handle operating device that electrically drives a hydraulic generating device to generate controlled hydraulic pressure when a switch is closed by pressing the door handle.

[0029] (Hydraulic pressure generator) The hydraulic pressure generator is a linear motor driven by pressing the transmitter; a hydraulic pressure generating unit in which a piston is slidably provided in a cylinder and which generates a control hydraulic pressure by moving the piston using a linear motor; Equipped with. [Effects of the Invention]

[0030] (Effect of fire hydrant equipment) The present invention is a fire hydrant device to be installed in a tunnel, which comprises a transmitter that operates a switch when pressed to send a fire notification signal to a disaster prevention receiving panel, and a fire hydrant door that is freely opened and closed at the opening of a housing that houses specified fire hydrant equipment, including a fire hose with a nozzle attached.The device is equipped with a door opening mechanism that opens the hydrant door in conjunction with the pressing of the transmitter.Therefore, in the event of a fire inside the tunnel, when a road user presses the transmitter to perform the fire notification operation, the hydrant door will automatically open, and the road user will be able to remove the water discharge nozzle from inside the housing whose fire hydrant door has automatically opened, pull out the fire hose, and operate the fire hydrant valve opening / closing lever to the open position to move to the fire location while spraying water, thereby enabling quick and appropriate firefighting activities.

[0031] (Effect of door opening mechanism 1) In addition, the door opening mechanism is equipped with a transmitter operating device in which a hydraulic pressure generating unit that generates control hydraulic pressure when the transmitter is pressed is provided together with the transmitter, and a gas spring that is provided within the housing and holds the hydrant door in the closed position in a contracted initial position, and when it receives control hydraulic pressure from the transmitter operating device, it releases the hydrant door from being held in the closed position and extends to open it to the open position.Therefore, by generating control hydraulic pressure when the transmitter is pressed and supplying it to the gas spring connected by hydraulic piping, the hydrant door can be released from being held closed and opened automatically, and since the hydrant door is automatically opened in conjunction with the operation of the transmitter without the need for electrical drive, there is no electrical deterioration, so reliable and stable operation is possible over a long period of time and high durability can be ensured.

[0032] (Effect of transmitter operating device 1) The transmitter operating device 1 of the door opening / closing mechanism 1 is a specified cylindrical body and is equipped with: a case body that is operated from one end and has the switch located inside the other end; a pressing operation unit that is movable to one end inside the cylindrical case body and is stored in an initial position so that it can be pressed from the outside of one end of the case body; a hydraulic pressure generating unit that has a piston slidably mounted in a cylinder located inside the case body and continues from the pressing operation unit to the other end, and generates controlled hydraulic pressure when the piston is moved by pressing the pressing operation unit; a piston rod that extends from the piston to the opposite side of the pressing operation unit; and a spring member that is stored inside the case body and continues from the other end from the hydraulic pressure generating unit and holds the piston rod and pressing operation unit in their initial positions.The switch is activated by the pressure of the piston rod when the pressing operation unit is pressed and the piston moves against the spring member, so that a structure that activates the switch and outputs a fire alarm signal when the transmitter is pressed and a structure that generates controlled hydraulic pressure to operate the gas spring can be realized as a transmitter operating device structure that is compactly integrated.

[0033] (Effect of non-locking switch) In addition, the switch of the transmitter operating device 1 is a non-locking switch that closes the contacts when pressed and opens the contacts when not pressed. The transmitter operating device 1 further comprises a rotational holding mechanism that, when the pressing operation part is pressed while the device is in its initial position, rotates the piston rod and moves it towards the other end to close the contacts of the non-locking switch and hold it in a predetermined position where control hydraulic pressure is generated, and when the pressing operation part is pressed while the piston rod is held in that predetermined position, releases the holding of the piston rod and rotates it to its initial position to open the contacts of the non-locking switch and release the generation of control hydraulic pressure. Therefore, even if the pressing operation by the road user is released, the contacts of the non-locking switch can remain closed, and even with a non-locking switch, it is possible to continuously send fire alert signals to the disaster prevention receiving panel. Furthermore, when recovering after a fire has been extinguished, the pressing operation part can be pressed again to release the piston rod and return it to its initial position, turning off the non-lock switch and stopping the fire alarm signal, and also releasing the generation of control hydraulic pressure, allowing the gas spring to hold the fire hydrant door in the closed position again.

[0034] (Effect of rotation holding mechanism) The rotation holding mechanism of the transmitter operating device 1 is provided with a guide slot formed on the outer wall of the case body at a predetermined inclination angle with respect to the axial direction which is the movement direction of the piston rod, and having an engagement groove formed at a predetermined position where the contact of the non-locking switch is closed and control oil pressure is generated, and a guide pin that stands on the outer periphery of the piston rod in accordance with the position of the guide slot and moves along the inclined guide surface of the guide slot to rotate the piston rod in the axial direction and is held by being engaged with the engagement groove, and the spring member is provided with a spring member that is provided on the piston rod held by the engagement of the guide pin with the engagement groove of the guide slot. A rotational restoring force is applied to the piston rod, and when the guide pin is released by pressing the pressing operation part, the rotational restoring force moves the piston rod to its initial position.Therefore, when the transmitter is operated, the guide pin standing on the piston rod of the hydraulic pressure generating part is rotated along the inclined guide surface of the guide slot formed on the outer wall of the case body, causing the piston rod to rotate and move, and the piston rod closes the contacts of the non-lock switch and engages the guide pin at a position where the contacts of the non-lock switch are closed, and at the same time, the movement of the piston is stopped and the controlled hydraulic pressure is maintained in a generated state.

[0035] Furthermore, when the piston rod is rotated by pressing the transmitter, the rotational restoring force caused by the winding of the spring member is accumulated by the piston rod being held in place by the guide pin being engaged.Therefore, when the pressing operation part is pressed again to release the guide pin engagement after the fire has been extinguished and recovery is underway, the accumulated rotational restoring force of the spring member will push the piston rod back to its initial position, opening the non-lock switch and making it possible to cancel the generation of control oil pressure.

[0036] (Effect of transmitter operating device 2) Also, another form of transmitter operating device 2 includes a case body that is a predetermined cylindrical body and is operated from one end side and has a switch arranged inside the other end side; a pressing operation unit that is movable to one end side within the cylindrical case body and is housed in an initial position so that it can be pressed from the outside of the one end side of the case body; a pressing rod that extends from the pressing operation unit in the pressing direction; a cylinder that is arranged within the case body continuing from the pressing operation unit to the other end side, a piston that is slidably provided on the pressing rod and a first spring member that is arranged between the piston and the pressing operation unit, and which compresses the first spring member when the pressing rod is moved by pressing the pressing operation unit, and then the piston is moved by the extension of the first spring member to generate control oil pressure; and a hydraulic pressure generating unit that is housed within the case body continuing from the oil pressure generating unit to the other end side, and which includes the pressing rod and and a second spring member that holds the pressing operation unit in its initial position. The switch is activated by the pressure of the pressing rod when the pressing operation unit is pressed and the pressing rod moves against the second spring member; therefore, compared to the transmitter operating device 1 described above, a piston is provided in the cylinder of the hydraulic generating unit and the pressing rod so that it can slide freely, and a first spring member is arranged between the pressing operation unit and the piston. When the transmitter is pressed, the piston stops and only the pressing rod moves, turning on the switch (first stage operation), at which time the first spring member is compressed, and then the compressed first spring member extends, causing the piston to move and generate control hydraulic pressure (second stage operation), releasing the gas spring from holding the fire hydrant door closed and automatically opening the fire hydrant door. With this two-stage operation, the pushing operation of the transmitter does not receive the reaction force of hydraulic pressure, but moves the push rod with a light force within the specified range required to compress the first spring member, activating the switch. Subsequently, the expansion of the compressed first spring member causes the movement of the piston, generating control hydraulic pressure, which automatically opens the fire hydrant door after a slight delay, and the automatic opening of the fire hydrant door is properly coordinated with the pushing operation of the transmitter.

[0037] (Effect of the non-lock switch on the transmitter operating device 2) In addition, the switch of the transmitter operating device 2 is a non-locking switch that closes the contacts when pressed and opens the contacts when not pressed, and the second transmitter operating device is further equipped with a rotational holding mechanism that, when the pressing operation part is pressed while the device is in its initial position, rotates the pressing rod and moves it towards the other end to close the contacts of the non-locking switch and compresses the first spring member to hold it in a predetermined position where it generates control hydraulic pressure, and when the pressing operation part is pressed while the pressing rod is held in that predetermined position, releases the holding of the pressing rod and rotates it to its initial position to open the contacts of the non-locking switch and release the generation of control hydraulic pressure.As such, as with the non-locking switch of the transmitter operating device 1 described above, it is possible for the contacts of the non-locking switch to remain closed even when the pressing operation by the road user is released, and it is possible for the non-locking switch to continuously send a fire alert signal to the disaster prevention receiving panel even though it is a non-locking switch. Furthermore, when recovering after the fire has been extinguished, the pressing operation part can be pressed again to release the pressure rod and return it to its initial position, turning off the non-lock switch and stopping the fire alarm signal, and also releasing the generation of control hydraulic pressure, allowing the gas spring to hold the fire hydrant door in the closed position again.

[0038] (Effect of the rotation holding mechanism of the transmitter operating device 2) The rotational holding mechanism of the transmitter operating device 2 is provided with a guide slot formed on the outer wall of the case body at a predetermined inclination angle with respect to the axial direction, which is the moving direction of the pressing rod, and having an engagement groove formed at a predetermined position where the contact of the non-locking switch is closed and control oil pressure is generated, and a guide pin that stands on the outer periphery of the pressing rod in accordance with the position of the guide slot and moves along the guide slot to rotate the pressing rod in the axial direction and is held by being engaged in the engagement groove, and the second spring member imparts a rotational restoring force to the pressing rod that is held by the engagement of the guide pin with the engagement groove of the guide slot, When the guide pin is released from its engagement as the pressing operation unit is pressed, the rotational restoring force moves the pressing rod to its initial position; therefore, similar to the case of the rotational holding mechanism of the transmitter operating device 1 described above, when the transmitter is operated, the guide pin standing on the pressing rod of the hydraulic pressure generating unit is rotated along the inclined guide surface of the guide slot formed in the outer wall of the case body, thereby rotating the pressing rod, which closes the contacts of the non-locking switch and locks the guide pin at a position where the contacts of the non-locking switch are closed, and at the same time, the movement of the piston is stopped, making it possible to maintain the controlled hydraulic pressure being generated.

[0039] Furthermore, when the piston rod is rotated and the guide pin is locked by pressing the transmitter, the rotational restoring force caused by the rotational movement of the pressing rod is accumulated in the second spring member. Therefore, when the pressing operation part is pressed again to release the lock on the guide pin after the fire has been extinguished, such as during recovery, the rotational restoring force accumulated in the second spring member pushes the pressing rod back to its initial position, opening the non-lock switch and canceling the generation of control oil pressure.

[0040] (Effect of door handle door operating device) In addition, the door handle of the fire hydrant door is equipped with a door handle operating device that generates controlled hydraulic pressure when pressed and supplies it to the gas spring, making it possible to open the fire hydrant door without operating the transmitter during construction or inspection.

[0041] (Effects of door handle operating device 1) Furthermore, the door handle operating device 1 is equipped with a pressing operation unit that is movable to one end side within a predetermined cylindrical case body and is stored in an initial position so that it can be pressed from outside one end side of the case body, a hydraulic pressure generating unit in which a piston is slidably mounted in a cylinder arranged within the case body continuing from the pressing operation unit to the other end side, and which generates controlled hydraulic pressure by moving the piston when the pressing operation unit is pressed, a piston rod that extends from the piston to the opposite side of the pressing operation unit, and a spring member that is stored within the case body continuing from the other end side of the hydraulic pressure generating unit and holds the piston rod and pressing operation unit in their initial positions, making it possible to realize a compact structure that generates controlled hydraulic pressure for operating a gas cylinder when pressed.

[0042] (Effect of rotation holding mechanism of door handle operating device 1) Furthermore, the door handle operating device 1 further includes a rotation holding mechanism that, when the pressing operation unit is pressed while the piston rod is in the initial position, rotates and moves the piston rod toward the other end to hold it at a predetermined position where the controlled hydraulic pressure is generated, and when the pressing operation unit is pressed while the piston rod is held at the predetermined position, releases the hold of the piston rod and rotates it back to the initial position to release the generation of the controlled hydraulic pressure, making it possible to maintain the generation of the controlled hydraulic pressure even when the pressing operation by the operator is released.In addition, the hydrant door can be closed after being opened by the gas spring, and by pressing the pressing operation unit again after the hydrant door is closed, the hold of the piston rod can be released and it can be returned to the initial position, releasing the generation of the controlled hydraulic pressure and allowing the gas spring to hold the hydrant door in the closed position again.

[0043] (Effect of the configuration of the rotation holding mechanism of the door handle operating device 1) In addition, the one-rotation holding mechanism of the door handle operating device is provided with a guide slot formed on the outer wall of the case body at a predetermined inclination angle with respect to the axial direction, which is the direction of movement of the piston rod, and with an engagement groove formed at a predetermined position where the control hydraulic pressure is generated, and a guide pin that stands on the outer periphery of the piston rod corresponding to the position of the guide slot and moves along the guide slot to rotate the piston rod in the axial direction and is engaged and held in the engagement groove, and the spring member imparts a rotational restoring force to the piston rod held by the engagement of the guide pin with the engagement groove of the guide slot, and when the lock pin is released by pressing the pressing operation unit, the rotational restoring force moves the piston rod to its initial position.Therefore, as with the case of the rotational holding function of the transmitter operating device 1 described above, when the door handle is operated, the guide pin that stands on the piston rod of the hydraulic pressure generating unit rotates and moves along the inclined guide surface of the guide slot formed on the outer wall of the case body and engages with the engagement groove, thereby stopping and holding the piston rod, and it becomes possible to maintain the state where the control hydraulic pressure is generated by stopping the movement of the piston.

[0044] Furthermore, when the piston rod is rotated by pressing the door handle, the rotational restoring force caused by the winding of the spring member accompanying the rotational movement is accumulated by the retaining engagement of the guide pin. Therefore, when the pressing operation part is pressed again, such as during recovery after the fire has been extinguished, the retaining engagement of the guide pin is released and the rotational restoring force of the spring member pushes the piston rod back to its initial position, making it possible to release the generation of control oil pressure.

[0045] (Effect of door handle operating device 2) The door handle operating device 2 also includes a pressing operation unit that is movable to one end side of a predetermined cylindrical case body and is housed in an initial position so as to be pressable from the outside of the one end side of the case body, a pressing rod that extends from the pressing operation unit in the pressing direction, a cylinder that is arranged in the case body from the pressing operation unit to the other end side, a piston that is slidably provided on the pressing rod and a first spring member that is arranged between the piston and the pressing operation unit, and after the first spring member is compressed by the movement of the pressing rod due to the pressing operation of the pressing operation unit, the piston is moved by the extension of the first spring member to generate control oil pressure, and a hydraulic pressure generating unit that is housed in the case body from the other end side and a second spring member that holds the push rod and the pushing operation unit in their initial positions, and therefore differs from the door handle operating device 1 described above in that a piston is provided in the cylinder and push rod of the hydraulic pressure generating unit so that it can slide freely, and a first spring member is arranged between the pushing operation unit and the piston, and when the door handle is pushed in, the piston stops and only the piston rod moves (first stage operation), at which time the first spring member is compressed, and then the piston moves as the compressed first spring member extends, generating control hydraulic pressure (second stage operation), which releases the gas spring from holding the fire hydrant door closed and automatically opens the fire hydrant door. With this two-stage operation, the pushing operation of the transmitter does not receive the reaction force of hydraulic pressure, but moves the push rod with a light force within the specified range required to compress the first spring member, activating the switch. Subsequently, the expansion of the compressed first spring member causes the movement of the piston, generating control hydraulic pressure, which automatically opens the fire hydrant door after a slight delay, and the automatic opening of the fire hydrant door is properly coordinated with the pushing operation of the transmitter.

[0046] (Effect of rotation holding mechanism of door handle operating device 2) Furthermore, the door handle operating device 2 further includes a rotation holding mechanism that, when the pressing operation unit is pressed while the door handle operating device 2 is in its initial position, compresses the second spring member to hold the push rod in a predetermined position where it generates the controlled hydraulic pressure, and when the pressing operation unit is pressed while the push rod is held in the predetermined position, releases the hold of the push rod and rotates it to the initial position, thereby releasing the generation of the controlled hydraulic pressure, similar to the rotation holding function of the door handle operating device 1 described above. Furthermore, the hydrant door can be closed after being opened by the gas spring, and by pressing the pressing operation unit again after the hydrant door is closed, the hold of the push rod can be released and it can be returned to its initial position, which in turn releases the generation of the controlled hydraulic pressure and allows the gas spring to hold the hydrant door in the closed position again.

[0047] (Effect of the door handle operating device 2-rotation holding mechanism configuration) The rotational holding mechanism of the door handle operating device 2 is formed on the outer wall of the case body at a predetermined inclination angle with respect to the axial direction, which is the movement direction of the push rod, and is equipped with a guide slot with an engagement groove formed at a predetermined position where the control hydraulic pressure is generated, and a guide pin that stands on the outer periphery of the push rod corresponding to the position of the guide slot and moves along the guide slot to rotate the piston rod in the axial direction and is engaged and held in the engagement groove. The second spring member imparts a rotational restoring force to the push rod, which is held in place by the engagement of the guide pin with the engagement groove of the guide slot, and when the engagement of the guide pin is released by pressing the pressing operation unit, the rotational restoring force moves the push rod to its initial position. Therefore, as with the rotational holding function of the door handle operating device 1 described above, when the door handle is operated, the guide pin that stands on the push rod of the hydraulic pressure generating unit rotates along the inclined guide surface of the guide slot formed on the outer wall of the case body and engages with the engagement groove, stopping the movement of the piston and making it possible to maintain the generation of the control hydraulic pressure.

[0048] Furthermore, when the push rod is rotated by pressing the door handle, a rotational restoring force is applied to the push rod, which is held in place by the guide pin engaged by the second spring member. Therefore, when the push operating part is pressed again after the fire has been extinguished, for example during recovery, the rotational restoring force of the second spring member pushes the push rod back to its initial position, making it possible to release the generation of control oil pressure.

[0049] (Effect of hydraulic pressure generating unit electrically driven by transmitter operation) In addition, the door opening mechanism is equipped with a hydraulic pressure generating device that is electrically driven by pressing the transmitter to generate controlled hydraulic pressure, and a gas spring that is provided within the housing and holds the hydrant door in the closed position in a contracted initial position, and when supplied with controlled hydraulic pressure from the hydraulic pressure generating device, releases the hydrant door from being held in the closed position and extends to open the hydrant door to the open position.Therefore, when a road user presses the transmitter in the event of a fire, the switch contact provided on the transmitter is turned on to electrically drive the hydraulic pressure generating device to generate controlled hydraulic pressure, release the gas spring from holding the hydrant door closed, and automatically open the hydrant door, making it possible to realize a structurally simple door opening mechanism.

[0050] (Effect of hydraulic pressure generating unit electrically driven by door handle operating device) In addition, the door handle of the fire hydrant door is equipped with a door handle operating device that electrically drives the hydraulic generating device to generate controlled hydraulic pressure when a switch is closed by pressing it, so that during construction or inspection, workers can open the fire hydrant door by pressing the door handle operating device and keep it closed without having to operate the transmitter.

[0051] (Effect of hydraulic pressure generator) The hydraulic pressure generating device includes a linear motor driven by pressing a transmitter, and a hydraulic pressure generating unit having a piston slidably mounted in a cylinder and generating control hydraulic pressure by moving the piston by the linear motor. The linear motor includes a cylindrical yoke made of a magnetic material with an E-shaped cross section in the axial direction, which is the pressing direction, and a movable coil arranged in the yoke so that a bobbin wound with a coil can move axially. When the switch contact is turned on by pressing, current is passed through the movable coil of the linear motor, and electromagnetic induction moves the movable coil to the other end of the yoke and pushes the piston, thereby generating control hydraulic pressure with a simple structure. The linear motor is also small, for example, with a diameter of about 30 mm and a length of 25 mm, making it possible to create a compact hydraulic pressure generating device that can be easily incorporated into the housing of a fire hydrant. [Brief explanation of the drawings]

[0052] [Figure 1] FIG. 2 is an explanatory diagram showing the fire hydrant device from the front. [Figure 2] This is an explanatory diagram showing the fire hydrant device from the front with the hydrant door, maintenance door, and fire extinguisher door open. [Figure 3] 1 is an explanatory diagram showing a first embodiment of a door opening mechanism that mechanically generates controlled hydraulic pressure when a transmitter or a door handle operating device is pressed to open a fire hydrant door. FIG. [Figure 4] FIG. 1 is an explanatory diagram showing the arrangement of a gas spring that opens a fire hydrant door. [Figure 5] FIG. 2 is an explanatory diagram showing the gas spring. [Figure 6] FIG. 2 is an explanatory diagram showing a cross section of the internal structure of the gas spring. [Figure 7] 4 is an explanatory diagram showing a first embodiment of a transmitter operating device provided in the door opening mechanism of FIG. 3. FIG. [Figure 8] 8 is an explanatory diagram showing the transmitter operating device of FIG. 7 from the bottom. FIG. [Figure 9] 8 is an explanatory diagram showing the operation of the transmitter operating device of FIG. 7. [Figure 10]4 is an explanatory diagram showing a first embodiment of a door handle operating device provided in the door opening mechanism of FIG. 3. FIG. [Figure 11] 4 is an explanatory diagram showing a second embodiment of a transmitter operating device provided in the door opening mechanism of FIG. 3. FIG. [Figure 12] 12 is an explanatory diagram showing the operation of the transmitter operating device of FIG. 11. FIG. [Figure 13] 4 is an explanatory diagram showing a second embodiment of a door handle operating device provided in the door opening mechanism of FIG. 3. FIG. [Figure 14] FIG. 10 is an explanatory diagram showing a second embodiment of a door opening mechanism that generates controlled hydraulic pressure by driving an electrical hydraulic pressure generating device through pressing of a transmitter or a door handle operating device to open a fire hydrant door. [Figure 15] FIG. 15 is an explanatory diagram showing the structure of the oil pressure generating device of FIG. 14. DETAILED DESCRIPTION OF THE INVENTION

[0053] [Basic concept of the embodiment] First, the basic concept of the embodiment will be described. The embodiment generally relates to a fire hydrant device that is installed in a tunnel and includes a transmitter and a fire hydrant door, and is a concept that includes a fire hydrant facility.

[0054] Here, a "transmitter" is a switch that is activated by pressing it and sends a fire notification signal to a disaster prevention receiving panel. A "fire hydrant door" is a door that can be opened and closed freely at the opening of a housing that houses a specific fire hydrant device, including a fire hose with a nozzle attached. The door may have any opening and closing structure, but examples include a forward-tilting door that pivots downward around the bottom of the door to open to an inclined position, a descending door that slides downward to open, and a rising door that slides upward to open.

[0055] The fire hydrant device of this embodiment is characterized by being provided with a door opening mechanism that opens the fire hydrant door in conjunction with pressing the transmitter.

[0056] Therefore, if a fire breaks out inside a tunnel, when a road user presses the transmitter to report the fire, the fire hydrant door will automatically open, and the road user will not need to consider the next operation to open the fire hydrant door; they can then remove the water discharge nozzle from inside the housing that automatically opens the fire hydrant door, pull out the fire hose, and operate the fire hydrant valve opening / closing lever to the open position, thereby moving to the location of the fire while spraying water and carrying out firefighting activities quickly and appropriately.

[0057] The "door opening mechanism" of the embodiment includes a transmitter operating device and a gas spring. Here, the "transmitter operating device" is a device in which a hydraulic pressure generating unit that mechanically generates a controlled hydraulic pressure when the transmitter is pressed is provided together with the transmitter. Note that "mechanical" refers to the generation of the controlled hydraulic pressure by mechanical drive, and does not include the generation of the controlled hydraulic pressure by electrical drive.

[0058] The "gas spring" is installed inside the housing of the fire hydrant device and holds the fire hydrant door in the closed position in its contracted initial position. When control oil pressure is supplied from the transmitter operating device, the gas spring releases the fire hydrant door from the closed position and expands to open it to the open position.

[0059] The structure, mechanism, and type of "gas spring" are arbitrary, but the gas spring with lock control function of this embodiment has a piston slidably mounted in a cylinder filled with oil to separate both cylinder chambers, a separate piston separating one of the cylinder chambers and filling the outer cylinder chamber with high-pressure inert gas to pressurize the oil, a piston rod fixed to the piston and extending to the outside, and a release mechanism in which a push rod inserted into the piston rod opens and closes a valve in an orifice passage having an orifice penetrating the piston. In this structure, when the valve is closed and the orifice flow path is blocked, oil does not flow between the both cylinder chambers, locking the piston and cylinder. When the push rod is pushed in and the valve opens, the orifice flow path is opened and oil in the cylinder chamber pressurized by the separate piston under gas pressure flows to the opposite cylinder chamber, moving the piston within the cylinder and performing a release operation (unlocking operation) in which the piston rod extends relative to the cylinder.

[0060] In addition, as a release head for releasing the "gas spring," the embodiment uses a hydraulic release head that opens a valve by supplying controlled hydraulic pressure to push a push rod attached to a piston rod.

[0061] Here, the mechanism for generating the control oil pressure to release the "gas spring" is broadly divided into a mechanism that generates the control oil pressure by mechanical drive when the transmitter is pressed, and a mechanism that generates the control oil pressure by electrical drive, and the embodiments are as follows: a "transmitter operating device that mechanically generates the control oil pressure" is called the "first embodiment of the transmitter operating device," and a "transmitter operating device that electrically generates the control oil pressure" is called the "second embodiment of the transmitter operating device."

[0062] The "transmitter operating device of the first embodiment" is provided with a hydraulic pressure generating unit that mechanically generates controlled hydraulic pressure when the transmitter is pressed, so that the fire hydrant door can be automatically opened in conjunction with the operation of the transmitter without the need for electrical drive.Since there is no electrical deterioration, it can operate reliably and stably over a long period of time, ensuring high durability.

[0063] Furthermore, the "transmitter operating device of the first embodiment" is comprised of a case body, a pressing operation unit, a hydraulic pressure generating unit, and a spring member. Here, the "case body" is a predetermined cylindrical body that is operated from one end and has a switch disposed inside the other end. The "pressing operation unit" is housed inside the case body so that it can move freely to one end side and can be pressed from outside the one end side of the case body in its initial position.

[0064] The "hydraulic pressure generating unit" is a cylinder arranged in the case body from the pressing operation unit to the other end, in which a piston is slidably provided, and generates controlled hydraulic pressure by moving the piston when the pressing operation unit is pressed. The "spring member" is a member housed in the case body from the hydraulic pressure generating unit to the other end, and holds the piston and pressing operation unit in their initial positions.

[0065] This makes it possible to realize a structure as a transmitter operating device that compactly integrates a structure that activates a switch by pressing the transmitter to output a fire alarm signal, and a structure that mechanically generates controlled hydraulic pressure to operate a gas spring.

[0066] Here, the "gas spring" is released when control oil pressure is generated by pressing the transmitter, causing the hydrant door to begin opening, but it is necessary to continuously apply control oil pressure until the hydrant door is fully open, and the "transmitter operating device of the first embodiment" is equipped with a "rotation holding mechanism" as a mechanism for maintaining the generation of control oil pressure even when the pressing operation is released.

[0067] Furthermore, by being provided with a "rotational holding mechanism," the switch of the "transmitter operating device of the first embodiment" becomes a non-locking switch. A "non-locking switch" is a switch that closes the contacts when pressed and opens the contacts when not pressed, and is closed (on) when the transmitter is pressed, but by being provided with a "rotational holding mechanism," it maintains the closed state (on) even when the pressing operation is released, and continuously outputs a fire alarm signal.

[0068] Therefore, the "rotational holding mechanism" of the embodiment is such that, when the pressing operation unit is pressed while in its initial position, the piston rod extending from the piston to the opposite side of the pressing operation unit is rotated and moved toward the other end, thereby closing the contacts of the non-lock switch and holding it in a predetermined position where control oil pressure is generated, and when the pressing operation unit is pressed while the piston rod is held in that predetermined position, the piston rod is released from the hold and rotated and moved to its initial position, thereby opening the contacts of the non-lock switch and canceling the generation of control oil pressure.

[0069] The structure and function of the "rotation holding mechanism" are arbitrary, but are typically comprised of a guide slot (a long, narrow guide hole) and a guide pin. Here, the "guide slot" refers to a portion of the outer wall of the case body that is formed at a predetermined inclination angle relative to the axial direction, which is the direction of piston rod movement, with a locking groove formed at a predetermined position where the contacts of the non-locking switch are closed and control hydraulic pressure is generated. The "guide pin" stands on the outer periphery of the piston rod in accordance with the position of the guide slot, and moves along the inclined guide surface of the guide slot to rotate the piston rod in the axial direction and to be locked and held in the locking groove.

[0070] In addition, the "spring member" becomes caught when the piston rod is rotated by pressing the transmitter, and is held in place by the guide pin, accumulating a rotational restoring force.Therefore, when the pressing operation part is pressed again after the fire has been extinguished, such as during recovery, the spring member is released from its hold, and the accumulated rotational restoring force pushes the piston rod back to its initial position, opening the non-lock switch and enabling the generation of control oil pressure to be released.

[0071] Furthermore, the "second embodiment of the transmitter operating device" is composed of a case body, a pressing operation unit, a hydraulic pressure generating unit, and a spring member, just like the "first embodiment of the transmitter operating device," but the structure of the hydraulic pressure generating unit is different, and a first spring member is provided in the hydraulic pressure generating unit as a spring member, and a second spring member is wound around the rotation holding mechanism.

[0072] The "hydraulic pressure generating unit" provided in the "second embodiment transmitter operating device" has a cylinder arranged inside the case body continuing from the pressing operation unit to the other end side, and a piston slidably provided on a pressing rod extending from the pressing operation unit in the pressing direction, and a first spring member arranged between the piston and the pressing operation unit, and after the first spring member is compressed by moving the pressing rod due to the pressing operation of the pressing operation unit, the piston is moved by the extension of the first spring member, thereby generating a controlled hydraulic pressure.

[0073] That is, it differs from the "transmitter operating device of the first embodiment" in that a piston is provided that can slide freely inside the cylinder of the hydraulic generating unit and outside the push rod, and a first spring member is arranged between the push operating unit and the piston; when the transmitter is pushed in, the piston stops and only the push rod moves, turning on the switch (first stage operation), at which time the first spring member is compressed, and then the compressed first spring member extends, causing the piston to move and generate control hydraulic pressure (second stage operation), releasing the gas spring from holding the fire hydrant door closed and allowing it to open automatically.

[0074] With this two-stage operation, the pushing operation of the transmitter does not receive the reaction force of hydraulic pressure, but moves the piston rod with a light force within the specified range required to compress the first spring member, activating the switch. Subsequently, the expansion of the compressed first spring member causes the piston to move, generating controlled hydraulic pressure, which automatically opens the fire hydrant door after a slight delay, and the automatic opening of the fire hydrant door is properly coordinated with the pushing operation of the transmitter.

[0075] (Effect of door handle door operating device) In addition, in this embodiment, a door handle operating device is provided on the door handle of the fire hydrant door to enable the door to be opened without operating the transmitter during construction or inspection. The "door handle operating device" supplies control oil pressure generated by pressing to the gas spring, making it possible to open the fire hydrant door.

[0076] Furthermore, the "door handle operating device" includes "first and second embodiments of the door handle operating device" corresponding to the aforementioned "first and second embodiments of the transmitter operating device," and the "first and second embodiments of the door handle operating device" have a structure in which the "non-lock switch" is removed from the "first and second embodiments of the transmitter operating device."

[0077] Furthermore, the "second embodiment of the door opening mechanism" comprises a hydraulic pressure generating device that is electrically driven by pressing a transmitter to generate controlled hydraulic pressure, and a gas spring that is provided within a housing and that holds the hydrant door in the closed position in a contracted initial position, and that, when supplied with controlled hydraulic pressure from the hydraulic pressure generating device, releases the closed position of the hydrant door and expands to open the hydrant door to the open position. Therefore, when a road user presses the transmitter in the event of a fire, a switch contact provided on the transmitter is turned on to electrically drive the hydraulic pressure generating device to generate controlled hydraulic pressure, which releases the gas spring from holding the hydrant door closed, thereby enabling the hydrant door to automatically open, thereby realizing a structurally simple door opening mechanism.

[0078] In addition, in the "second embodiment of the door opening mechanism," a door handle operating device (push button switch) is provided on the door handle of the fire hydrant door, which electrically drives the hydraulic pressure generating device to generate controlled hydraulic pressure when the switch is closed by pressing it. Therefore, during construction or inspection, workers can open the fire hydrant door by pressing the door handle operating device, and also keep it closed, without having to operate the transmitter.

[0079] The "hydraulic pressure generating device" is electrically driven by pressing a transmitter or a door handle operating device (push button switch) to generate a controlled hydraulic pressure. The "gas spring" holds the hydrant door in the closed position in its contracted initial position, and when it receives a supply of controlled hydraulic pressure from the hydraulic pressure generating device, it releases the hydrant door from the closed position and expands to open it to the open position, and is similar to the "gas spring" provided in the door opening mechanism of the first embodiment described above.

[0080] The "hydraulic pressure generating device" may have any structure, function, or type, but may be, for example, composed of a linear motor and a hydraulic pressure generating unit. Here, the "linear motor" is a well-known device also known as a voice coil motor (VCM), and is electrically driven by pressing a transmitter, while the "hydraulic pressure generating unit" has a piston slidably mounted in a cylinder, and generates a controlled hydraulic pressure by moving the piston caused by the linear motor.

[0081] The linear motor is equipped with a cylindrical yoke made of magnetic material with an E-shaped cross section in the axial direction, which is the direction of the pressing operation, and a movable coil with a bobbin wound with a coil placed in the yoke so that it can move axially.When the switch contact is turned on by pressing the transmitter, electricity is passed through the movable coil of the linear motor, and electromagnetic induction moves the movable coil relative to the yoke and pushes the piston, making it possible to generate controlled hydraulic pressure with a simple structure.

[0082] Specific embodiments are described below. In the specific embodiments described below, the "fire hydrant device" refers to a "fire hydrant device of a disaster prevention system applied to emergency facilities in tunnels." The door-opening mechanism that opens the fire hydrant door in conjunction with pressing a transmitter is described separately as a "first embodiment of a mechanical door-opening mechanism" and a "second embodiment of an electric door-opening mechanism." The "first embodiment of a mechanical door-opening mechanism" is comprised of a transmitter operating device that activates a hydraulic pressure generating unit by pressing a transmitter to generate a control hydraulic pressure and activates a switch to transmit a fire alert signal, and a gas spring that receives the control hydraulic pressure and opens the fire hydrant door. However, due to the difference in the hydraulic pressure generating unit provided in the transmitter operating device, the description is divided into a "first embodiment of a transmitter operating device" and a "second embodiment of a transmitter operating device." In addition, the "second embodiment of the electric door opening mechanism" electrically drives the hydraulic pressure generating device by pressing a transmitter that serves as a push button switch or a door handle operating device, and the generated control hydraulic pressure is applied to a gas spring to open the fire hydrant door. However, we will explain the case where a "linear motor" is provided as an electrical device that electrically operates the hydraulic pressure generating unit.

[0083] [Specific details of the embodiment] The embodiments of the fire hydrant device will be described separately as follows. a. Fire hydrant equipment a1. Overview of fire hydrant equipment a2.Outline of the door opening mechanism b. First embodiment of door opening mechanism b1. Door opening mechanism configuration b2.Gas spring c. First embodiment of transmitter operating device c1. Transmitter and transmitter operating device c2. Rotation holding mechanism c3. Operation of transmitter and transmitter operating device d. First embodiment of door handle operating device d1. Door handle operating device structure d2. Rotation holding mechanism d3. Operation of door handle operating device e. Second embodiment of transmitter operating device f. Second embodiment of door handle operating device g. Second embodiment of door opening mechanism g1. Door opening mechanism configuration g2. Hydraulic pressure generator h. Modifications of the present invention

[0084] [a. Fire hydrant equipment] First, the fire hydrant device will be described with reference to Figure 1, which shows the fire hydrant device from the front, and Figure 2, which shows the fire hydrant device from the front with the hydrant door, maintenance door, and fire extinguisher door open.

[0085] 1 and 2, the X, Y, and Z directions are perpendicular to each other. Specifically, when looking at the front of the fire hydrant device equipped with various doors, the X direction is the left-right direction, the Y direction is the up-down direction, and the Z direction is the front-to-back direction. The +X side of the X direction is the right side, the -X side is the left side, the +Y side of the Y direction is the top side, the -Y side is the bottom side, and the +Z side of the Z direction is the front side, and the -Z side is the back side. This also applies to Figures 4 and 7-13.

[0086] (a1. Overview of fire hydrant equipment) As shown in Figure 1, the fire hydrant device 10 is installed on a stand 11 in a hollowed-out section formed, for example, at intervals of 50 meters on the wall of the guard passage along the tunnel wall, and is structured to be divided into a housing 12a whose interior serves as a fire hydrant storage section and a housing 12b whose interior serves as a fire extinguisher storage section, and decorative frames 14a, 14b are attached to the front of the housings 12a, 12b.

[0087] The door opening of the decorative frame 14a of the housing 12a is divided into upper and lower halves, with a forward-leaning fire hydrant door 16 that opens downwards on hinges 16a provided at the lower part of the door opening, and a maintenance door 18 that opens upwards on hinges 18a provided at the upper part of the door opening, and inside this is a fire hydrant storage section that stores fire hoses and valves including fire hydrant valves.

[0088] On the left side of the door opening in decorative frame 14b of housing 12b, there is provided fire extinguisher door 28 that opens sideways to the left on hinge 28a, and the fire extinguisher storage section inside stores, for example, two fire extinguishers 32. In addition, fire extinguisher door 28 is provided with a viewing window 30 corresponding to the position of the stored fire extinguisher 32, so that the presence or absence of fire extinguisher 32 can be confirmed from the outside.

[0089] An electrical door 20 that opens sideways to the right on a hinge 20a is provided on the right side of the door opening in the decorative frame 14b. The electrical door 20 is provided with, for example, a red indicator light 22, a transmitter 24, and an answer lamp 26 as components of an emergency notification device, and a telephone jack 25 is provided inside the housing of the electrical door 20 as shown in FIG.

[0090] The red indicator light 22 is normally lit at all times, allowing the installation location of the fire hydrant device 10 to be identified from a distance. In a first embodiment of the door opening mechanism described below, the transmitter 24 is integrally provided with a mechanical transmitter operating device, and when the transmitter 24 is pressed, a control oil pressure is mechanically generated in the oil pressure generating section of the transmitter operating device, and the switch contacts of the non-lock switch are closed to send a fire notification signal (transmission signal) to the disaster prevention receiving panel, and even if the pressing of the transmitter 24 is released, the generation of the control oil pressure and the closure of the switch contacts of the non-lock switch are maintained, and when the transmitter 24 is pressed again thereafter, the hold is released and the initial state is restored.

[0091] In addition, the disaster prevention receiving panel, which receives the fire notification signal from the transmitter 24, sends a start signal to the fire pump control panel, which then flashes the red indicator lights 22 of all the fire hydrant devices simultaneously as a confirmation signal for pump start, thereby notifying the tunnel in which the fire hydrant device 10 is installed that the pump has started, and also starts pressurizing the supply of fire water to the primary side of the fire hydrant valve housed in the fire hydrant device 10.

[0092] Here, the transmitter 24 is equipped with a protective plate made of a transparent material such as glass that is held on the front side of the electrical door 20. When the protective plate is pushed in, it comes off the front side of the electrical door 20, and the protective plate and the push button activate a hydraulic pressure generating unit of the transmitter operating device that is located on the back side of the electrical door 20 to generate controlled hydraulic pressure, and presses a non-locking switch of the transmitter operating device, which keeps the switch contacts closed and transmits a fire alert signal to the disaster prevention receiving panel. The pushed-in protective plate remains in a detached state on the back side of the electrical door 20. For this reason, during recovery after a fire has been extinguished, a worker opens the electrical door 20 and presses the transmitter operating device to release the hydraulic pressure and the closed switch contacts, and then performs recovery work of fitting the protective plate that has fallen off on the back side of the electrical door 20 back on the front side of the electrical door 20 and holding it there.

[0093] The response lamp 26 lights up in response to a response signal transmitted from the disaster prevention receiving panel when the disaster prevention receiving panel receives a fire notification signal. The response lamp 26 is connected to the disaster prevention receiving panel via an interlocking switch contact for response lighting that is interlocked with the transmitter switch contact of the non-locking switch provided on the transmitter operating device of the transmitter 24, and lights up when the interlocking switch contact for response lighting that is interlocked with the closure of the transmitter switch contact is closed.

[0094] As shown in Figure 2, the right side of the fire hydrant storage section in the housing 12a is a valve storage section, and a water supply pipe 34 drawn in from the outside is connected to a water supply hydrant 36 and branches off to connect a fire hose 50 via a fire hydrant valve 38 and an automatic pressure regulating valve 40. The left side of the fire hydrant storage section in the housing 12a is a hose storage section, and the hose storage section is provided with a hose storage frame 52, which stores the fire hose 50 drawn in from below by winding it inward clockwise or counterclockwise. The fire hose 50 is drawn out through a hose outlet 58 installed on the back side of the hydrant door 16, and a water discharge nozzle 56 is attached to the tip of the fire hose 50, and the water discharge nozzle 56 is detachably held in a nozzle holder 54.

[0095] The fire hydrant valve 38 is opened and closed by a fire hydrant valve opening / closing lever 44 on an operation box 42 located on the back side of the fire hydrant door 16, and when the fire hydrant valve opening / closing lever 44 is opened or closed, this movement is transmitted to an interlocking box 46 by a wire link, and the fire hydrant valve 38 is opened or closed remotely.

[0096] The interlocking box 46 is provided with a pump start interlocking device 47 that uses a limit switch or the like to detect the lever open position of the fire hydrant valve opening / closing lever 44, and the pump start interlocking device 47 closes the switch contacts of the limit switch to send a fire notification signal (transmission signal) to the disaster prevention receiving panel, and the disaster prevention receiving panel that receives the fire notification signal sends a start signal to the fire pump control panel, which causes the red indicator lights 22 of all the fire hydrant devices to flash simultaneously, thereby notifying the start of pump start in the tunnel where the fire hydrant devices 10 are installed, and also starts the pressurized supply of fire water to the fire hoses stored in the fire hydrant devices 10.

[0097] Furthermore, a pump start-up device 48 used by the fire brigade is provided inside the hydrant door 16 and maintenance door 18 when they are open. When the push button of the pump start-up device 48 is pressed, the switch is held closed, and similar to the pump start-up interlocking device 47, a pump start-up signal (transmission signal) is sent to the disaster prevention receiving panel, and the disaster prevention receiving panel that receives the pump start-up signal sends a start-up signal to the fire pump control panel, which causes the red indicator lights 22 of all the fire hydrant devices to flash simultaneously, thereby announcing the start of the pumps in the tunnel where the fire hydrant devices 10 are installed, and further starts the pressurized supply of fire water to the primary side of the fire hydrant valve housed in the fire hydrant devices 10.

[0098] 2, terminal boxes 35a and 35b equipped with terminal blocks are disposed on the interior rear surface of housing 12b behind fire extinguisher door 28. High-voltage signal wiring (signal cable) from the disaster prevention receiving panel is connected to the terminal block of terminal box 35a, and internal wiring for red indicator light 22 is also connected to it. Furthermore, low-voltage signal wiring (signal cable) from the disaster prevention receiving panel is connected to the terminal block of terminal box 35b, and internal wiring for transmitter 24, answer lamp 26, telephone jack 25, pump start-up device 48, and pump start-up interlocking device 47 is also connected to it. Furthermore, a cable rack 55 is disposed at the top of housing 12a, extending from near the center of the valve storage section to the hose storage section, and signal wiring for pump start-up device 48 and pump start-up interlocking device 47 is inserted through it.

[0099] (a2. Overview of the door opening mechanism) Next, we will explain the outline of the door opening mechanism of the fire door, which opens in conjunction with the pressing operation of the transmitter. As shown in Figure 1, a gas spring 60 is arranged near the center of the housing 12a, which is the back side of the fire hydrant door 16. The gas spring 60 has a piston rod extending from the top of the cylinder to the outside, the bottom end of the cylinder rotatably connected to the back side of the fire hydrant door 16, and the top end of the piston rod rotatably connected to the back side of the housing.

[0100] In addition, hydraulic piping from the hydraulic pressure generating unit of the transmitter operating device installed inside the door of the transmitter 24 installed in the electrically equipped door 20 is connected to the hydraulic release head of the gas spring 60. When the transmitter 24 is pressed, the control hydraulic pressure is applied to the gas spring 60, the lock on the piston rod is released, and the gas pressure of the inert gas filled in the cylinder extends the cylinder side relative to the piston rod, and the hydrant door 16 is opened to the fully open position shown in Figure 2 around the hinge 16a.

[0101] 1, a door handle operating device 68 is provided on the door handle at the top center of the hydrant door 16. When the push button of the door handle operating device 68 is pushed in, the hydraulic pressure generating unit generates controlled hydraulic pressure and supplies it to the gas spring 60, thereby releasing the closed state of the hydrant door 16 and extending it, opening the hydrant door 16 as shown in FIG. 2. The door handle operating device 68 is used when opening the hydrant door 16 without operating the transmitter 24 during construction or inspection. In addition, handles 64 are provided on both sides of the top of the hydrant door 16, and are used to close the open hydrant door 16.

[0102] [b. First embodiment of door opening mechanism] Next, a first embodiment of the door opening mechanism will be described. In this description, reference will be made to Fig. 3, which shows a first embodiment of the door opening mechanism that opens the hydrant door by mechanically generating controlled hydraulic pressure when a transmitter or a door handle operating device is pressed, Fig. 4, which shows the arrangement structure of the gas spring that opens the hydrant door, Fig. 5, which shows the gas spring removed, and Fig. 6, which shows a cross section of the internal structure of the gas spring. Fig. 4(A) shows the hydrant door in a closed state, and Fig. 4(B) shows the hydrant door in an open state.

[0103] (b1. Door opening mechanism configuration) As shown in FIG. 3, the first embodiment of the door opening mechanism is composed of a transmitter operating device 66, a door handle operating device 68, and a gas spring 60. The transmitter operating device 66 is integrally disposed inside the transmitter 24 provided on the electrically equipped door 20 shown in FIGS. 1 and 2, and generates a controlled hydraulic pressure when the transmitter 24 is pressed, and transmits a fire alert signal to the disaster prevention receiving panel. The door handle operating device 68 is provided on the fire hydrant door 16 as shown in FIG. 1, and generates a controlled hydraulic pressure when the push button is pressed. Hydraulic piping 70 is drawn from the transmitter operating device 66 and the door handle operating device 68, and after joining and connecting, is connected to the gas spring 60. The hydraulic piping 70 is, for example, a flexible hydraulic cable, which can be easily routed and arranged within the housing.

[0104] 4(A), the gas spring 60 is disposed relative to the fire hydrant device 10 such that a rotating connector 6020 provided on the rod side of the gas spring 60 is fixed to the upper rear surface inside the housing 12a, and a rotating connector 6011 on the cylinder side is fixed to the back surface of the hydrant door 16. A damper 62 is also disposed in parallel with the gas spring 60. The damper 62 has a rotating connector 6210 on the cylinder side fixed to the upper rear surface inside the housing 12a, and a rotating connector 6211 on the rod side fixed to the inside of the hydrant door 16.

[0105] 2 and 4, the gas spring 60 and damper 62 are arranged so that they overlap when viewed from the front of the fire hydrant device 10 and are one above the other when viewed from the side, but they may also be arranged in other ways, for example, so that they are side by side when viewed from the front and overlap when viewed from the side. The damper 62 adjusts the time that the hydrant door 16 remains open to prevent road users from being surprised when the door 16 is opened together with the pressure of the transmitter 24.

[0106] When no control hydraulic pressure is applied, the cylinder side and rod side of the gas spring 60 are locked and do not move, holding the hydrant door 16 in the closed position as shown in Figure 4(A). When control hydraulic pressure is applied to the gas spring 60, the lock is released and the gas spring 60 enters a released state. The gas pressure of the inert gas filling the cylinder and the weight of the hydrant door 16 move the piston, causing it to extend as shown in Figure 4(B), opening the hydrant door 16. At this time, the movement of the hydrant door 16 is suppressed by the simultaneous extension of the damper 62, allowing the hydrant door 16 to open gently. Note that if the cushioning performance of the gas spring 60 itself is sufficient for the weight of the hydrant door 16, the damper 62 may be omitted.

[0107] (b2. Gas spring) Next, we will explain the gas spring 60 with a lock control function. As shown in Fig. 5, the gas spring 60 has a cylinder 6010, a rod 6012, and a push pin 6016. When the push pin 6016 is pushed in, the lock is released, and when the rod 6012 is on the fixed side, it pushes out the cylinder 6010, which is on the moving side, and extends it.

[0108] In order to push in the push pin 6016 of the gas spring 60, a hydraulic release head 6018 is screwed into the threaded portion 6014 of the rod 6012 and is secured in place by a double nut 6021. The hydraulic release head 6018 is connected to hydraulic piping 70, and receives control hydraulic pressure generated by pushing in the transmitter operating device 66 or door handle operating device 68 shown in Figure 3, which pushes in the push pin 6016 and releases the lock.

[0109] The gas spring 60 with lock control function and the hydraulic release head 6018 have the structure shown in Fig. 6. The gas spring 60 has a cylinder 6010, in which a piston 6022 is slidably provided, and a separate piston 6024 is slidably provided in the cylinder following the piston 6022. A rod 6012 is integrally provided with the piston 6022, and the rod 6012 extends from the cylinder 6010 to the outside.

[0110] Inside the cylinder 6010, a first cylinder chamber 6026, a second cylinder chamber 6028, and a third cylinder chamber 6030 are formed in this order by the arrangement of the piston 6022 and the separate piston 6024. The first cylinder chamber 6026 and the second cylinder chamber 6028 are filled with oil, and the third cylinder chamber 6030 is filled with an inert gas, for example, nitrogen gas, pressurized to a predetermined pressure.

[0111] The piston 6022 is provided with an orifice 6032 and a valve 6034. Inside the rod 6012, a push pin 6016 is provided so as to be axially movable. One end thereof protrudes outside the rod 6012, and the other end is connected to the valve 6034. When the illustrated push pin 6016 protrudes outside, the valve 6034 is closed, and when the push pin 6016 is pushed in, the valve 6034 opens.

[0112] The valve 6034 opens and closes the flow path of the orifice 6032 that communicates the first cylinder chamber 6026 and the second cylinder chamber 6028 formed by the piston 6022. That is, at the non-pushed-in position where the push pin 6016 protrudes outside, the valve 6034 closes the flow path through the orifice 6032 to lock the piston 6022, and at the pushed-in position of the push pin 6016, the valve 6034 opens the flow path through the orifice 6032 to release the lock of the piston 6022 and move the cylinder 6010 with respect to the fixed-side rod 6012. The moving speed in this case is a speed corresponding to the flow resistance of the oil flowing through the orifice 6032, and the cylinder 6010 is moved slowly.

[0113] When comparing the pressure receiving area S1 at the upper end of the cylinder 6010 in the first cylinder chamber 6026 and the pressure receiving area S2 at the lower end of the cylinder 6010 in the third cylinder chamber 6030, the pressure receiving area S1 at the upper end is smaller than the pressure receiving area S2 at the lower end because the rod 6012 penetrates the cylinder 6010.

[0114] Also, the pressures in the first cylinder chamber 6026, the second cylinder chamber 6028, and the third cylinder chamber 6030 are the pressure P of the nitrogen gas filled in the third cylinder chamber 6030. Here, when the rod 6012 is the fixed side, an upward force F1 determined by the pressure receiving area S1 at the upper end and the pressure P is applied to the cylinder 6010, and a downward force F2 determined by the pressure receiving area S2 at the lower end and the pressure P is applied. However, since F1 < F2, when the valve 6034 opens, a downward force of (F2 - F1) is applied to the cylinder 6010.

[0115] That is, when the hydraulic release head 6018 pushes the push pin 6016 to open the valve 6034 and unlock the piston 6022, the cylinder 6010, which is the moving side relative to the rod 6012, which is the fixed side, receives a force of (F2-F1) and moves.

[0116] Also, for example, if the door handle operating device 68, which is held in the pushed-in position (details will be described later), is pushed in again while the fire hydrant door 16 is being opened by pushing the door handle operating device 68, the door handle operating device 68, which is held in the pushed-in position, returns to its original position, releasing the generation of the control oil pressure and locking the gas spring 60, making it possible to stop the fire hydrant door 16 in that position. Note that, when closing the open fire hydrant door 16, the fire hydrant door 16 is returned to the closed position, and the transmitter operating device 66 or door handle operating device 68, which was initially pushed in, is continuously pushed in, thereby releasing the control oil pressure and locking the gas spring 60, thereby holding it in the closed position.

[0117] [c. First embodiment of transmitter operating device] Next, a first embodiment of the transmitter operating device will be described. In this description, reference will be made to Fig. 7, which shows the first embodiment of the transmitter operating device provided in the door opening mechanism of Fig. 3, Fig. 8, which shows the transmitter operating device of Fig. 7 from the bottom, and Fig. 9, which shows the operation of the transmitter operating device of Fig. 7. Note that Fig. 9(A) shows a side cross section, and Fig. 9(B) shows the bottom.

[0118] (c1. Transmitter and transmitter operating device) First, the transmitter and the transmitter operating device will be described. As shown in FIG. 7, the transmitter 24 is A protective plate storage section 74 is provided between the electrical door 20 and a mounting plate 75 on the rear side of the door, and a protective plate 72 is held on the front side of the electrical door 20 so that it can be detached and moved inward (rearward) by pressing from the front.

[0119] A transmitter operating device 66 is attached and fixed to a mounting plate 75 arranged on the back side of the electrical door 20, facing the protective plate 72 held by the electrical door 20. The transmitter operating device 66 includes case bodies 76, 77, a pressing operation unit 82, a hydraulic pressure generating unit equipped with a cylinder 78 and a piston 80, a coil spring 94 serving as a spring member, and a non-locking switch 96.

[0120] The case body 76 is, for example, a cylindrical body that opens to the front, and a flange portion 7610 formed at one end of the cylindrical body on the front side is attached and fixed to the mounting plate 75 with a screw 7612 and a nut 7614.

[0121] A pressing operation unit 82 is housed in the front side of the cylinder of case body 76 so as to be movable in the axial direction (front-rear direction), and is formed as a piston rod on one end side of a piston 80 provided in the hydraulic pressure generating unit. The pressing operation unit 82 protrudes forward from case body 76 and is extended forward via a through-hole formed in mounting plate 75. A cap-shaped waterproof cover 85 made of soft synthetic resin, rubber, or the like is provided on pressing operation unit 82 extended forward from mounting plate 75, and waterproof cover 85 is attached and fixed to mounting plate 75 when flange portion 7610 of case body 76 is fixed to mounting plate 75 with screws 7612 and nuts 7614.

[0122] The inside of the case body 76 is a cylinder 78 in which a piston 80 equipped with a seal 88 is slidably housed. A piston rod extends from the front side of the piston 80 to form a pressing operation portion 82, and a piston rod 84 extends from the rear side and is slidably taken out rearward through a shaft hole in the bottom of the case body 76 via a seal 88. A hydraulic port 86 communicating with the inside of the cylinder 78 is provided on the bottom side of the case body 76, and the hydraulic port 86 is connected to the gas sprinkler 60 via hydraulic piping 70 as shown in FIG. 3.

[0123] A case body 77 having a cylindrical outer diameter smaller than that of the case body 76 is connected to the rear of the case body 76, and a coil spring 94 functioning as a spring member is provided inside the case body 77. One end of the coil spring 94 is fixed to the piston rod 84, and the other end is fixed to the inner wall of the rear end side of the case body 77, and presses the piston 80 located on the front side forward to hold it in its initial position.

[0124] A non-locking switch 96 is provided at the bottom rear end of the case main body 77. The non-locking switch 96 is a two-circuit switch that has a switch contact for the transmitter and an interlocking switch contact for lighting the response lamp, and the switch contact is closed (ON) when the switch knob 9610 is pressed, and the switch contact is opened (OFF) when the switch knob 9610 is released. In other words, the non-locking switch 96 closes the switch contact only while the switch knob 9610 is pressed, and does not have the function of keeping the switch contact closed when the switch knob 9610 is no longer pressed after the switch contact is closed.

[0125] Furthermore, the non-lock switch 96 has four lead terminals 9612 extending rearward through the bottom, corresponding to the switch contacts of the two circuits, and the internal wiring extending from the terminal box 35b shown in Fig. 2 is connected to the lead terminals 9612. A terminal waterproof cover 98 is provided at the bottom of the case body 77 to protect the lead terminals 9612 extended to the outside.

[0126] When the protective plate 72 of the transmitter 24 is pressed and the pressing operation part 82 of the transmitter operating device 66 is pressed, the piston 80 moves and presses the oil filled in the cylinder 78, generating control oil pressure, unlocking the gas spring 60 and opening the fire hydrant door 16. At the same time, the movement of the piston rod 84 presses the switch knob 9610, closing the switch contacts of the non-lock switch 96 and transmitting a fire alert signal to the disaster prevention receiving panel.

[0127] Here, when the transmitter 24 is pressed, it is necessary to maintain the supply of control oil pressure to the gas spring 60 and also to maintain the transmission of the fire alarm signal to the disaster prevention receiving panel, and for this reason, a rotation holding mechanism is provided in the transmitter operating device 66.

[0128] (c2. Rotation holding mechanism) Next, a rotation holding mechanism provided in the transmitter inspection device 66 will be described. As shown in Figures 7 and 8, the rotation holding mechanism of this embodiment includes a guide slot 92 and a guide pin 90. The guide slot 92 is formed as an elongated hole at a predetermined angle of inclination with respect to the axial direction (front-to-back direction) of the cylindrical surface of the outer wall of the case main body 77. The guide pin 90 stands on the outer periphery of the piston rod 84 that extends rearward of the piston 80 provided in the hydraulic pressure generating section, and is inserted into the guide slot 92.

[0129] As shown in FIG. 7, the guide slots 92 are formed at two opposing locations on the outer wall of the case body 77, for example, at the top and bottom, and the guide pins 90 similarly stand upright at two opposing locations on the outer periphery of the piston rod 84, corresponding to the positions of the guide slots 92.

[0130] Therefore, when the pressing operation portion 82 is pushed rearward by pressing the transmitter 24 and the piston rod 84 moves along with the movement of the piston 80, the guide pin 90 and the guide slot 92 have the function of moving the piston 80 and the piston rod 84 rearward while rotating them around their axis against the coil spring 94.

[0131] As shown in FIG. 8, the guide slot 92 formed in the case body 77 rotates the piston rod 84 by guiding the guide pin 90 in the direction of a predetermined inclination angle as the piston rod 84 moves rearward, and also has a locking groove 100 that locks the guide pin 90 at a position where the piston rod 84 presses the switch knob 9610 of the non-lock switch 96 to close the switch contacts.

[0132] Therefore, the guide pin 90 and the guide slot 92 have the function of rotating the piston 80 and the piston rod 84 rearward against the coil spring 94, and the function of maintaining the switch contacts in a closed state when the piston rod 84 presses the switch knob 9610 of the non-lock switch 96 to close them, and maintaining the generation of control oil pressure by the piston 80.

[0133] Furthermore, when the piston rod 84 rotates rearward against the coil spring 94, the coil spring 94 is compressed in the axial direction (front-to-back direction) and simultaneously wound around the axis, and when the guide pin 90 is engaged with the locking groove 100 of the guide slot 92, a rotational restoring force is accumulated in the piston rod 84 to return it to its initial position.

[0134] Therefore, when restoring the protective plate 72 of the transmitter 24 after pressing it, if the pressing operation unit 82 is pressed further through the waterproof cover 85, the guide pin 90 engaged in the engagement groove 100 of the guide slot 92 is pushed and shifts rearward from the engagement groove 100, and is released from the engagement groove 100 by the rotational restoring force accumulated by the winding of the coil spring 94, and the piston rod 84, piston 80 and pressing operation unit 82 formed integrally with the plate 72 are moved to their initial positions by the rotational restoring force of the coil spring 94, releasing the generation of the control oil pressure and returning the switch contacts of the non-lock switch 96 to the open state.

[0135] (c3. Operation of the transmitter and transmitter operating device) Next, the operation of the transmitter 24 and the transmitter operating device 66 of the first embodiment will be described. As shown in Figure 9(A), in an emergency such as a fire, when a road user presses the protective plate 72 of the transmitter 24 provided on the electrically equipped door 20 as shown by the arrow, the pressing operation part 82 is pushed backward, and the piston 80 moves backward, pressing the oil in the cylinder 78 to generate control oil pressure, and the control oil pressure supplied to the gas spring 60 begins to rise.

[0136] 9(B), the guide pin 90 standing on the piston rod 84 moves rearward along the guide slot 92 of the case body 77, causing the piston rod 84 to rotate rearward and push in the switch knob 9610 of the non-lock switch 96, closing the switch contacts. When the switch contacts are closed, a fire alert signal is sent to the disaster prevention receiving panel, and at the same time, the control oil pressure, which is rising due to the movement of the piston 80, unlocks the gas spring 60, causing the fire hydrant door 16 to open.

[0137] In addition, the guide pin 90 standing on the piston rod 84 moves along the guide slot 92, and the guide pin 90 engages with the engagement groove 100 at a position where it closes the switch contact of the non-lock switch 96, thereby holding the piston rod 84, maintaining the control oil pressure generated by the piston 80, and keeping the non-lock switch 95 in a closed state.

[0138] At this time, the coil spring 94 is compressed while being wound up in accordance with the rotational movement of the piston rod 84, and a rotational restoring force is accumulated in the coil spring 94 at the position where the guide pin 90 is engaged and held in the locking groove 100. Note that when the control oil pressure for the gas spring 60 is maintained, the gas spring 60 is unlocked, and therefore the fire hydrant door 16 in the open state can be opened and closed.

[0139] When recovering after the fire has been extinguished, if the operator presses the pressing operation part 82 further, the guide pin 90 will come out of the locking groove 100, and the rotational restoring force accumulated by the winding of the coil spring 94 will push the integrated piston rod 84, piston 80 and pressing operation part 82 back to their initial positions, releasing the generation of control oil pressure and the closed state of the non-lock switch 96.

[0140] Furthermore, for an open fire hydrant door 16, the gas spring 60 is unlocked when the door is restored, so an operator can manually close the fire hydrant door 16 and, in this state, press the pressing operation part 82 to release the generation of control oil pressure, thereby locking the gas spring 60 and returning the fire hydrant door 16 to its initial state in which it is held in the closed position.

[0141] [d. First embodiment of door handle operating device] Next, a door handle operating device provided on the fire hydrant door will be described. In this description, reference will be made to Fig. 10, which shows a first embodiment of the door handle operating device provided on the door opening mechanism of Fig. 3. Fig. 10(A) shows a side cross section, and Fig. 10(B) shows a bottom view.

[0142] As shown in Figure 10(A), the door handle operating device 68 is arranged on the fire hydrant door 16, and its structure corresponds to the structure of the transmitter operating device 66 shown in Figures 7 to 9 with the non-lock switch removed.

[0143] (d1. Structure of door handle operating device) The door handle operating device 68 includes a handle cover 102 , a push button 104 , case bodies 106 and 107 , a push operation portion 112 , a piston 110 , a piston rod 114 , and a coil spring 122 .

[0144] The case body 106 is, for example, a cylindrical body that opens to the front, and a flange portion 1060 formed at one end of the cylindrical body on the front side is attached and fixed to the fire hydrant door 16 with a screw 1062 to the handle cover 102 arranged on the front side of the door.

[0145] A pressing operation unit 112 extends axially from the front side of the case body 106, and has a push button 104 attached to its tip. The pressing operation unit 112 is formed as a piston rod on one end side of a piston 110 provided in the hydraulic pressure generating unit.

[0146] The inside of the case body 106 is a cylinder 108, in which a piston 110 equipped with a seal 115 is slidably housed. A piston rod extends from the front side of the piston 110 to form a pressing operation part 112, and a piston rod 114 extends from the rear side and is slidably taken out rearward from a shaft hole in the bottom of the main case 106 via the seal 115. A hydraulic port 116 communicating with the inside of the cylinder 108 is provided on the bottom side of the main case 106, and the hydraulic port 116 is connected to the gas sprinkler 60 via hydraulic piping 70 as shown in FIG. 3.

[0147] A main body case 107 having a cylindrical outer diameter smaller than that of the case main body 106 is connected to the rear of the case main body 106, and a coil spring 122 functioning as a spring member is provided inside the main body case 107. One end of the coil spring 122 is fixed to the piston rod 114, and the other end is fixed to the bottom of the case main body 107, and the coil spring 122 presses the piston 110 located on the front side forward to hold it in its initial position.

[0148] Here, when the door handle operating device 68 is pressed, it is necessary to maintain the supply of control oil pressure to the gas spring 60, and for this reason the door handle operating device 68 is provided with a rotation maintaining mechanism.

[0149] (d2. Rotation holding mechanism) As shown in Figure 10(A), the rotation holding mechanism of the door handle operating device 68 includes a guide slot 118 and a guide pin 120. As shown in Figure 10(B), the guide slot 118 is formed as a long, narrow hole that has a predetermined inclination angle with respect to the axial direction (front-to-back direction) of the cylindrical surface of the outer wall of the case main body 107. The guide pin 120 stands on the outer periphery of a piston rod 114 that extends rearward from a piston 110 provided in the hydraulic pressure generating section, and is inserted into the guide slot 118.

[0150] Here, the guide slots 118 are formed at two opposing locations on the outer wall of the case body 107, for example, at the top and bottom, and the guide pins 120 similarly stand upright at two opposing locations on the outer periphery of the piston rod 114, corresponding to the positions of the guide slots 118.

[0151] Therefore, when the push button 104 is pressed to push the pushing operation portion 112 rearward and the piston rod 114 moves along with the movement of the piston 110, the guide pin 120 and the guide slot 118 have the function of moving the piston 110 and the piston rod 114 rearward while rotating them around their axis against the coil spring 122.

[0152] As shown in FIG. 10(B), the guide slot 118 formed in the case body 107 rotates the piston rod 114 by guiding the guide pin 120 in the direction of a predetermined inclination angle as the piston rod 114 moves rearward, and also has a locking groove 124 that locks the guide pin 120 at a position where the control oil pressure generated by the movement of the piston 110 reaches a predetermined value.

[0153] Therefore, the guide pin 120 and the guide slot 118 rotate the piston 110 and the piston rod 114 rearward against the coil spring 122, and have the function of maintaining the generation of the control oil pressure when the control oil pressure, which rises as the piston 110 moves, reaches a predetermined value.

[0154] Furthermore, when the piston rod 114 rotates rearward against the coil spring 122, the coil spring 122 is compressed in the axial direction (front-to-back direction) and simultaneously wound around the axis, and when the guide pin 120 is engaged with the locking groove 124 of the guide slot 118, a rotational restoring force is accumulated in the piston rod 114 to return it to its initial position.

[0155] Therefore, when recovering from a pressed operation of the push button 104, if the push button 104 is pressed and the pressing operation unit 112 is pressed further, the guide pin 120 that is engaged in the engaging groove 124 of the guide slot 118 is pushed and shifts rearward from the engaging groove 124, and is released from the engaging groove 124 by the rotational restoring force that has accumulated due to the winding of the coil spring 122, and the piston rod 114, piston 110 and pressing operation unit 112 that are formed integrally with the guide pin 120 move to their initial positions by the rotational restoring force of the coil spring 122, thereby releasing the control oil pressure.

[0156] (d3. Operation of door handle operating device) Next, the operation of the door handle operating device 68 of the first embodiment will be described. As shown in Figure 10(A), when an operator opens the hydrant door without operating the transmitter 24 during construction, inspection, or the like, the operator presses the push button 104 provided in the handle cover 102 of the hydrant door 16, which pushes the pressing operation part 112 rearward, causing the piston 110 to move rearward, which presses the oil in the cylinder 108 to generate control oil pressure, and the control oil pressure supplied to the gas spring 60 begins to rise.

[0157] Furthermore, the guide pin 120 standing on the piston rod 114 moves rearward along the guide slot 118 of the case body 107, causing the piston rod 114 to rotate rearward.

[0158] When the control oil pressure, which rises due to the movement of the piston 110, reaches a predetermined value, the gas spring 60 is unlocked, the hydrant door 16 is opened, and the guide pin 120, which has been moving along the guide slot 118, is engaged and held in the locking groove 124, maintaining the control oil pressure generated by the piston 110. At this time, the coil spring 122 is compressed while being wound up in accordance with the rotational movement of the piston rod 114, and a rotational restoring force is accumulated in the coil spring 122 at the position where the guide pin 120 is engaged and held in the locking groove 124. Note that, since the gas spring 60 is unlocked when the control oil pressure for the gas spring 60 is maintained, the hydrant door 16, which is in the open state, can be opened and closed.

[0159] When restoring the system after the work is completed, the worker presses the pressing operation unit 112 further using the push button 104, which disengages the guide pin 120 from the locking groove 124. The rotational restoring force accumulated by the winding of the coil spring 122 pushes the integrated piston rod 114, piston 110, and pressing operation unit 112 back to their initial positions, and the generation of the controlled hydraulic pressure is released.

[0160] Furthermore, for the open fire hydrant door 16, the gas spring 60 is unlocked when the door is restored, so an operator can manually close the fire hydrant door 16 and then press the push button 104 in this state to release the generation of control hydraulic pressure, thereby locking the gas spring 60 and returning the fire hydrant door 16 to its initial state in which it is held in the closed position.

[0161] [e. Second embodiment of transmitter operating device] Next, a second embodiment of the transmitter operating device will be described. In this description, reference will be made to Fig. 11, which shows the second embodiment of the transmitter operating device provided in the door opening mechanism of Fig. 3, and Fig. 12, which shows the operation of the transmitter operating device of Fig. 11. Note that Fig. 11(A) shows the internal structure in the initial state, Fig. 11(B) shows the first stage of operation associated with a pressing operation, and Fig. 12 shows the second stage of operation associated with a pressing operation.

[0162] The transmitter operating device 660 of the second embodiment shown in Figure 11(A) differs from the transmitter operating device 66 of the first embodiment shown in Figures 7 to 9 in the structure of the oil pressure generating unit, but since the structure other than the oil pressure generating unit is similar, the same symbols are used and their descriptions are omitted.

[0163] In the oil pressure generating section of the transmitter operating device 660, a piston 81 is slidably housed in a cylinder 78 of the case body 76, but the piston 81 is not fixed to a pressing rod 83 which corresponds to the piston rod 84 of the first embodiment, and the shaft hole 8010 is also slidable relative to the pressing rod 83. A seal 88 is provided in the shaft hole 8010.

[0164] A retainer 130 is formed on the opening side of the case body 76 of the pressing operation portion 82 formed by extending the pressing rod on the front side of the piston 81, and a first coil spring 132 serving as a first spring member is disposed between the retainer 130 and the piston 81. Note that a spring member the same as the coil spring 94 in the first embodiment shown in Fig. 7 is provided in the rear case body 77, which is compressed and wound up by the rotational movement of the pressing rod 83 towards the rear, but in the second embodiment it is a second coil spring 134.

[0165] The operation of the transmitter operating device 660 is as follows: In the event of a fire, when a road user presses in the protective plate 72 of the transmitter 24 shown in Figure 11(A), the pressing operation part 82 is pressed in as shown by the arrow in Figure 11(B), and the movement of the retainer 130 compresses the first coil spring 132, causing the pressing rod 83 to move rearward, but initially, the force of the first coil spring 132 is small, so the piston 81 hardly moves at all. The pressing rod 83 moves and rotates as the guide pin 90 moves along the guide slot 92, and is locked and held in place, and the switch knob 9610 is pressed in to close the non-lock switch 96, thereby performing the first-stage operation of outputting a fire alert signal.

[0166] In this first stage of operation, the pressure rod 83 is not subjected to the hydraulic reaction force caused by the piston 81 being pushed in, and only the force required to compress the first coil spring 132 and the second coil spring 134 is required. This means that the hydraulic reaction force does not interfere with the movement that activates the non-lock switch 96, and the non-lock switch 96 can be quickly closed by pressing it, allowing a fire alert signal to be sent.

[0167] Next, as shown in Figure 12 (C), with the pushing rod 83 rotated and held rearward, the piston 81 moves rearward due to the extension of the compressed first coil spring 132, increasing the control oil pressure from the oil pressure port 86, and when it reaches a predetermined value, the gas spring 60 is unlocked and the second stage operation is performed to open the fire hydrant door 16.

[0168] [f. Second embodiment of door handle operating device] Next, a second embodiment of the door handle operating device will be described with reference to Fig. 13, which shows the second embodiment of the door handle operating device provided in the door opening mechanism of Fig. 3.

[0169] The door handle operating device 680 of the second embodiment shown in Figure 13 differs from the door handle operating device 68 of the first embodiment shown in Figure 10 in the structure of the hydraulic pressure generating unit, but since the structure other than the hydraulic pressure generating unit is the same, the same symbols are used and their explanations are omitted.

[0170] In the hydraulic pressure generating section of the door handle operating device 680, a piston 111 is housed slidably in a cylinder 108 of a case body 106, but the piston 111 is not fixed to a pressing rod 113 which corresponds to the piston rod 114 of the first embodiment, and the shaft hole 8110 is also slidable relative to the pressing rod 113. In addition, a seal 115 is provided in the shaft hole.

[0171] Furthermore, a retainer 140 is formed on the opening side of case body 106 of pressing operation portion 112 formed by extending the pressing rod on the front side of piston 111, and a first coil spring 142 serving as a first spring member is disposed between retainer 140 and piston 111. Note that a spring member the same as coil spring 122 in the first embodiment shown in Fig. 10 is provided in rear case body 107, which is compressed and wound up by the rotational movement of pressing rod 113 towards the rear side, but in the second embodiment it is a second coil spring 144.

[0172] The operation of door handle operating device 680 is as follows: When an operator presses push button 104 during installation or inspection, pushing operation part 112 is pushed in, and the movement of retainer 140 compresses first coil spring 142, causing push rod 113 to move rearward, but at this time piston 111 hardly moves. The first stage of operation is performed in which push rod 113 moves and rotates as guide pin 120 moves along guide slot 118, and is locked and held in place.

[0173] In this first stage of operation, the push rod 113 does not receive the hydraulic reaction force caused by the pushing of the piston 111, and only the force required to compress the first coil spring 142 and the second coil spring 144 is required, so that the movement of the push button 104 is not hindered by the hydraulic reaction force, and the push button can be pressed.

[0174] Next, with the pushing rod 113 rotated and held rearward, the piston 111 moves rearward due to the expanding force of the first coil spring 142, which has increased due to compression, and the controlled oil pressure from the oil pressure port 116 increases. When the controlled oil pressure reaches a predetermined value, the gas spring 60 is unlocked and the second stage operation is performed, opening the fire hydrant door 16.

[0175] [g. Second embodiment of door opening mechanism] Next, a second embodiment of the door opening mechanism will be described. In this description, reference will be made to Fig. 14, which shows a second embodiment of the door opening mechanism that opens the fire hydrant door by generating controlled hydraulic pressure through the driving of an electrical hydraulic pressure generating device by pressing a transmitter or a door handle operating device, and Fig. 15, which shows the structure of the hydraulic pressure generating device of Fig. 14. Note that Fig. 15(A) shows the structure of the equipment arranged inside the case body, and Fig. 15(B) shows the cross-sectional structure of the equipment.

[0176] (g1. Door opening mechanism configuration) As shown in FIG. 14, the door opening mechanism of the fire hydrant device 10 of this embodiment is composed of a transmitter 24 of the electrically equipped door 20, a door handle operating device 150 of the fire hydrant door 16, an electrically driven hydraulic pressure generating device 164, and a gas spring 60 provided in the housing 12a.

[0177] The hydraulic pressure generating device 164 includes a linear motor 166 as an electric drive unit and a hydraulic pressure generating unit 168. The hydraulic pressure piping 70 extends from the hydraulic pressure generating unit 168 and is connected to the gas spring 60.

[0178] The transmitter 24 provided on the electrically equipped door 20 is provided with a lock switch and is equipped with a three-circuit normally open switch contact that includes a switch contact 2410 for the transmitter, an interlocking switch contact 2412 for lighting the response lamp, and an interlocking switch contact 2414 for generating hydraulic pressure. A signal wiring 154 is drawn out from the disaster prevention receiving panel 152, and the signal wiring 154 includes a transmitter signal line 156, a response signal line 158, a hydraulic signal line 160, and a common line 162.

[0179] Switch contact 2410 of transmitter 24 is connected between transmitter signal line 156 and common line 162, and is closed when transmitter 24 is pressed, outputting a fire notification signal to disaster prevention receiving panel 152. Interlocking switch contact 2412 for turning on the response lamp is connected between response signal line 158 and common line 162 via response lamp 26, and when disaster prevention receiving panel 152 receives a fire notification signal from transmitter 24, it outputs line voltage to response signal line 158, and response lamp 26 lights up.

[0180] An interlocking switch contact 2414 for generating hydraulic pressure of the transmitter 24 is connected between the hydraulic signal line 160 and the common line 162 via the linear motor 166 of the hydraulic pressure generator 164, and a switch contact 1510 of the door handle operating device 150 is connected in parallel to the interlocking switch contact 2414. A driving voltage is constantly supplied to the hydraulic pressure signal line 160 from the disaster prevention receiving panel 152.

[0181] In the event of a fire, when a road user presses the transmitter 24 to close (turn on) the interlocking switch contact 2414, a drive voltage is supplied to the linear motor 166 of the hydraulic generator 164, causing it to operate and drive the hydraulic generator 168 to generate control hydraulic pressure. The generated control hydraulic pressure unlocks the gas spring 60, causing the hydrant door 60 to open. Also, when a worker presses the door handle operating device 150 during construction or inspection, the hydraulic generator 164 is similarly electrically driven to generate control hydraulic pressure, which unlocks the gas spring 60 and opens the hydrant door 16.

[0182] (g2. Hydraulic pressure generator) As shown in Figure 15(A), the hydraulic pressure generating device 164 has case bodies 170 and 172, each open at one end, connected to each other by a flange at the opening, with the linear motor 166 housed in the case body 170 and the hydraulic pressure generating unit provided in the case body 172.

[0183] The linear motor 166 is a known motor, and is composed of a yoke 1712 and a moving coil unit 1714, for example, as shown in FIG. 15(B). The yoke 1712 is made of a magnetic material, has a cylindrical hole that opens on one side (the rear side), and has an E-shaped cross section in the axial direction (front-to-back direction). The moving coil unit 1714 has a coil 1715 wound around the outer periphery of a coil bobbin 1716, and is provided so as to be movable in the axial direction (front-to-back direction) relative to the cylindrical hole of the yoke 1712. The coil 1715 is connected to a lead terminal 1710 that is externally connected.

[0184] When the coil 1715 of the linear motor 166 is energized, a thrust force approximately proportional to the current flowing through the coil 1715 of the moving coil portion 1714 relative to the yoke 1712 is generated by electromagnetic induction, and the moving coil portion 1714 is pushed out from the yoke 1712 .

[0185] A piston 176 is slidably mounted via a seal 184 in a cylinder 174 formed within the case body 172, which constitutes the hydraulic pressure generating unit 168, and one end of the piston rod 178 is connected to a moving coil unit 1714 of the linear motor 166. A coil spring 182 functioning as a tension spring is disposed between the linear motor 166 and the piston 176, and the other end of the piston rod 178 is taken out via a seal 184 from a shaft hole in the bottom of the case body 172. A cylinder chamber filled with oil is formed inside the case body 172 on the other end side of the piston rod 178, and a hydraulic port 180 is provided at the bottom to supply the control hydraulic pressure generated in the cylinder chamber to the gas spring 60 via hydraulic piping 70.

[0186] When the linear motor 166 is energized, the moving coil portion 1714 is pushed out, and the piston 176 moves against the coil spring 182 via the piston rod 178, and the oil in the cylinder 174 is pressurized to generate control oil pressure. As shown in Figure 14, the oil is supplied to the gas spring 60 via the hydraulic piping 70 to release the lock, and the fire hydrant door 16 is opened.

[0187] 14 uses a lock switch, and so once a push-in operation is performed, the switch contacts remain closed (on state), and the energization and drive of the linear motor 166 continues. When the transmitter 24 or door handle operation device 150 is pushed again, the switch contacts open (off), the energization and drive of the linear motor 166 is released, and the piston rod 178, piston 176, and moving coil portion 1714 return to their initial positions by the coil spring 182, releasing the generation of the control hydraulic pressure and returning the gas spring 60 to the locked state.

[0188] With such an electric door opening mechanism, the transmitter 24 and door handle operating device 150 can be a simple lock switch, and although there are limitations to durability due to electrical deterioration compared to the mechanical door opening mechanism of the first embodiment, it has the advantage of being simple in structure and being able to achieve low costs.

[0189] [h. Modifications of the present invention] Modifications of the fire hydrant device according to the present invention will be described. In addition to the above-described embodiment, the fire hydrant device of the present invention includes the following modifications.

[0190] (Rotational holding mechanism for transmitter operating device and door operating device) In the embodiment where the controlled hydraulic pressure is generated mechanically, a rotational holding mechanism using a guide slot and guide pin is used as a method of holding the piston rod and pushing rod of the transmitter operating device and door operating device at a predetermined position in the pushing direction, but this is not limited to such a configuration and other holding mechanisms, such as a push-lock mechanism used in ballpoint pens, may also be used.

[0191] (Fire extinguisher door) In addition, the fire extinguisher door may be opened in conjunction with the operation of a transmitter, as in the case of the fire hydrant door in the above embodiment. At this time, a message indicating that the fire extinguisher door will be opened and guidance on how to handle the fire extinguisher may be output.

[0192] (Fire hydrant door open notification) In the above embodiment, the fire hydrant door is automatically opened by pressing the transmitter. However, since road users are usually unaware of this function, an instruction manual such as "Press the transmitter to open the fire hydrant door" is provided near the transmitter. Furthermore, if a speaker is provided, the opening of the fire hydrant door may be notified by a voice message from the speaker when the transmitter is pressed. Furthermore, in a shock absorber using an oil damper, the interference force may be increased to open the door at a slower speed than usual, to avoid catching the operator by surprise.

[0193] (Fire hydrant door opening structure) The above embodiment is an example of a forward-tilting door that rotates downward around both sides of the lower end of the fire hydrant door as an axis to open to an inclined position, but the door opening mechanism may also be for a descending door that opens by lowering the fire hydrant door vertically when the gas spring is unlocked, or for a rising door that opens by raising the fire hydrant door vertically when the gas spring is unlocked.

[0194] In the first embodiment of the door opening device described above, a transmitter operating device 66 and a door handle operating device 68 are provided as operating devices that unlock the gas spring 60 and open the hydrant door 60, but a configuration may also be adopted in which the door handle operating device 68 is not provided and only the transmitter operating device 66, which is operated by pressing the transmitter 24, is provided. In this case, during construction or inspection, the worker can switch the disaster prevention receiving panel to a construction and maintenance mode in which no alarm is issued even when a fire notification signal is received, and then press the transmitter 24 to operate the transmitter operating device 66, thereby opening the hydrant door without issuing an alarm on the disaster prevention receiving panel.

[0195] (others) Furthermore, the present invention includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited to the numerical values ​​shown in the above embodiments. [Explanation of symbols]

[0196] 10: Fire hydrant equipment 12a, 12b: Housing 14a, 14b: decorative frame 16: Fire hydrant door 18: Maintenance door 20: Electric door 22: Red indicator light 24: Transmitter 2410: Switch contact 2412, 2414: Interlocking switch contacts 25: Telephone Jack 26: Answer lamp 28: Fire extinguisher door 30: Peephole 32: Fire extinguisher 34: Water supply piping 35a, 35b: Terminal box 36: Water tap 38: Fire hydrant valve 40: Automatic pressure regulating valve 42: Operation box 44: Fire hydrant valve opening / closing lever 46: Interlocking box 47: Pump start interlocking device 48: Pump starting device 50: Fire hose 52: Hose storage frame 54: Nozzle holder 55: Cable rack 56: Water nozzle 58: Hose outlet 60: Gas spring 6010: Cylinder 6011, 6020: Rotating connection part 6012: Rod 6014: Threaded part 6016: Push pin 6018: Hydraulic release head 6021,7614: Nut 6022: Piston 6024: Separate piston 6026: First cylinder chamber 6028: Second cylinder chamber 6030: Third cylinder chamber 6032: Orifice 6034: Valve 62: Damper 64: Toride 66,660: Transmitter operating device 68,150,680: Door handle operating device 70: Hydraulic piping 72: Protective plate 74: Protective plate storage section 76, 77, 106, 107, 170, 172: Case body 7610, 1060: Flange part 7612: Bis 78, 108, 174: Cylinder 80, 81, 110, 111, 176: Piston 8010, 8110: Shaft hole 82,112: Press operation unit 83,113: Pressing rod 84,114,178: Piston rod 85: Waterproof cover 86,116: Hydraulic port 88,115,184: Seal 90,120: Guide pin 92,118: Guide slot 94, 122, 182: Coil spring 96: Non-locking switch 9610: Switch knob 9612: Lead terminal 98: Terminal waterproof cover 100, 124: Locking groove 102: Steering wheel cover 104: Push button 130,140: Retainer 132, 142: First coil spring 134,144: Second coil spring 164: Hydraulic pressure generator 166: Linear motor 168: Hydraulic pressure generating unit 166: Linear motor 152: Disaster prevention receiving panel 154: Signal wiring 156: Transmitter signal line 158: Response signal line 160: Hydraulic signal line 162: Common line 1710: Lead terminal 1712: York 1714: Moving coil part 1715: Coil 1716: Coil bobbin

Claims

1. A transmitter that activates a switch by pressing it and transmits a fire notification signal to a disaster prevention receiving panel; a fire hydrant door that is provided so as to be freely opened and closed at an opening of a housing that houses a predetermined fire hydrant device including a fire hose with a nozzle attached; A fire hydrant device comprising: A fire hydrant device characterized by comprising a door opening mechanism that opens the fire hydrant door in conjunction with the pressing operation of the transmitter.

2. The fire hydrant device according to claim 1, The door opening mechanism includes: a transmitter operating device provided with a hydraulic pressure generating unit that mechanically generates a control hydraulic pressure by pressing the transmitter; a gas spring that is provided in the housing and that holds the fire hydrant door in a closed position in a contracted initial position, and that, when supplied with the control hydraulic pressure from the transmitter operating device, releases the holding of the fire hydrant door in the closed position and expands to open the fire hydrant door to an open position; A fire hydrant device comprising:

3. The fire hydrant device according to claim 2, The transmitter operating device is a case body that is a predetermined cylindrical body and is operated from one end side, and the switch is disposed inside the other end side; a pressing operation unit that is housed in the case body and is movable toward one end side thereof and that can be pressed from outside the one end side of the case body at an initial position; a hydraulic pressure generating unit having a piston slidably mounted in a cylinder disposed in the case body and continuing from the pressing operation unit to the other end side, the hydraulic pressure generating unit generating the control hydraulic pressure by movement of the piston due to pressing operation of the pressing operation unit; a piston rod extending from the piston to the opposite side of the pressing operation unit; a spring member that is housed in the case body and continues from the hydraulic pressure generating unit to the other end side, and that holds the piston rod and the pressing operation unit at the initial positions; Equipped with The fire hydrant device, characterized in that the switch is activated by the pressure of the piston rod when the pressing operation portion is pressed and the piston moves against the spring member.

4. The fire hydrant device according to claim 3, The switch is a non-locking switch that closes the contacts when pressed and opens the contacts when not pressed, The transmitter operating device further comprises a rotation holding mechanism that, when the pressing operation unit is pressed while the piston rod is in the initial position, rotates and moves the piston rod toward the other end to close the contacts of the non-lock switch and hold it at a predetermined position where the control hydraulic pressure is generated, and when the pressing operation unit is pressed while the piston rod is held at the predetermined position, releases the holding of the piston rod and rotates and moves it to the initial position to open the contacts of the non-lock switch and release the generation of the control hydraulic pressure.

5. The fire hydrant device according to claim 4, The rotation holding mechanism includes: a guide slot formed in an outer wall of the case body at a predetermined inclination angle with respect to an axial direction which is the moving direction of the piston rod, the guide slot having an engagement groove formed at a predetermined position where the control oil pressure is generated while the contact of the non-lock switch is closed; a guide pin that stands on the outer periphery of the piston rod in correspondence with the position of the guide slot, moves along the guide slot to rotate the piston rod in the axial direction, and is engaged and held in the engaging groove; Equipped with The spring member applies a rotational restoring force to the piston rod held by the engagement of the guide pin with the engagement groove of the guide slot, and when the engagement of the guide pin is released by pressing the pressing operation unit, the rotational restoring force moves the piston rod to the initial position.

6. The fire hydrant device according to claim 2, The transmitter operating device is a case body that is a predetermined cylindrical body and is operated from one end side, and the switch is disposed inside the other end side; a pressing operation unit that is housed in the case body and is movable toward one end side thereof and that can be pressed from outside the one end side of the case body at an initial position; a pressing rod extending from the pressing operation portion toward the pressing direction; a hydraulic pressure generating unit in which a piston is slidably provided on a cylinder and the pressing rod disposed in the case body continuing from the pressing operation unit to the other end side, and a first spring member is disposed between the piston and the pressing operation unit, the first spring member is compressed by the movement of the pressing rod due to the pressing operation of the pressing operation unit, and then the piston is moved by the extension of the first spring member to generate the control hydraulic pressure; a second spring member that is housed in the case body and continues from the hydraulic pressure generating unit to the other end side, and that holds the pressing rod and the pressing operation unit at the initial positions; Equipped with The fire hydrant device, characterized in that the switch is activated by the pressure of the push rod when the push operation portion is pressed and the push rod moves against the second spring member.

7. The fire hydrant device according to claim 6, The switch is a non-locking switch that closes the contacts when pressed and opens the contacts when not pressed, The transmitter operating device further comprises a rotation holding mechanism that, when the pressing operation unit is pressed while the transmitter operating device is in the initial position, rotates and moves the pressing rod toward the other end to close the contacts of the non-lock switch and compress the first spring member to hold the pressing rod at a predetermined position where the control hydraulic pressure is generated, and when the pressing operation unit is pressed while the pressing rod is held at the predetermined position, releases the holding of the pressing rod and rotates it to the initial position to open the contacts of the non-lock switch and cancel the generation of the control hydraulic pressure.

8. The fire hydrant device according to claim 7, The rotation holding mechanism includes: a guide slot formed in an outer wall of the case body at a predetermined inclination angle with respect to an axial direction which is the moving direction of the pressing rod, the guide slot having an engagement groove formed at a predetermined position where the contact of the non-lock switch is closed and the control oil pressure is generated; a guide pin that stands on the outer periphery of the pressing rod in correspondence with the position of the guide slot, moves along the guide slot to rotate the pressing rod in the axial direction, and is engaged and held in the engaging groove; Equipped with The second spring member applies a rotational restoring force to the pushing rod held by the engagement of the guide pin with the engagement groove of the guide slot, and when the engagement of the guide pin is released by pressing the pushing operation unit, the rotational restoring force moves the pushing rod to the initial position.

9. The fire hydrant device according to claim 2, A fire hydrant device characterized in that the door handle of the fire hydrant door is provided with a door handle operating device that generates controlled hydraulic pressure when pressed and supplies it to the gas spring.

10. The fire hydrant device according to claim 9, The door handle operating device is a pressing operation unit that is housed in a predetermined cylindrical case body and is movable to one end side of the case body and can be pressed from outside the one end side of the case body at an initial position; a hydraulic pressure generating unit having a piston slidably mounted in a cylinder disposed in the case body and continuing from the pressing operation unit to the other end side, the hydraulic pressure generating unit generating the control hydraulic pressure by movement of the piston due to pressing operation of the pressing operation unit; a piston rod extending from the piston to the opposite side of the pressing operation unit; a spring member that is housed in the case body and continues from the hydraulic pressure generating unit to the other end side, and that holds the piston rod and the pressing operation unit at the initial positions; A fire hydrant device comprising:

11. The fire hydrant device according to claim 10, The door handle operating device further comprises a rotation holding mechanism that, when the pushing operation unit is pressed while the door handle operating device is in the initial position, moves the piston rod toward the other end while rotating, and holds the piston rod at a predetermined position where the control hydraulic pressure is generated, and when the pushing operation unit is pressed while the piston rod is held at the predetermined position, releases the holding of the piston rod and rotates it to move it to the initial position, thereby canceling the generation of the control hydraulic pressure.

12. The fire hydrant device according to claim 11, The rotation holding mechanism includes: a guide slot formed in an outer wall of the case body at a predetermined inclination angle with respect to an axial direction which is the moving direction of the piston rod, the guide slot having an engagement groove formed at a predetermined position where the control hydraulic pressure is generated; a guide pin that stands on the outer periphery of the piston rod in correspondence with the position of the guide slot, moves along the guide slot to rotate the piston rod in the axial direction, and is engaged and held in the engaging groove; Equipped with The spring member applies a rotational restoring force to the piston rod held by the engagement of the guide pin with the engagement groove of the guide slot, and when the engagement of the guide pin is released by pressing the pressing operation unit, the rotational restoring force moves the piston rod to the initial position.

13. The fire hydrant device according to claim 9, The door handle operating device is a pressing operation unit that is housed in a predetermined cylindrical case body and is movable to one end side of the case body and can be pressed from outside the one end side of the case body at an initial position; a pressing rod extending from the pressing operation portion toward the pressing direction; a hydraulic pressure generating unit in which a piston is slidably provided on a cylinder and the pressing rod disposed in the case body continuing from the pressing operation unit to the other end side, and a first spring member is disposed between the piston and the pressing operation unit, the first spring member is compressed by the movement of the pressing rod due to the pressing operation of the pressing operation unit, and then the piston is moved by the extension of the first spring member to generate the control hydraulic pressure; a second spring member that is housed in the case body and continues from the hydraulic pressure generating unit to the other end side, and that holds the pressing rod and the pressing operation unit at the initial positions; A fire hydrant device comprising:

14. The fire hydrant device according to claim 13, The door handle operating device further comprises a rotation holding mechanism that, when the pushing operation unit is pressed while the door handle operating device is in the initial position, compresses the first spring member and holds it at a predetermined position where the control hydraulic pressure is generated, and when the pushing operation unit is pressed while the pushing rod is held at the predetermined position, releases the holding of the pushing rod and rotates it to the initial position to cancel the generation of the control hydraulic pressure.

15. The fire hydrant device according to claim 14, The rotation holding mechanism includes: a guide slot formed in an outer wall of the case body at a predetermined inclination angle with respect to an axial direction which is the moving direction of the pressing rod, the guide slot having an engagement groove formed at a predetermined position where the control hydraulic pressure is generated; a guide pin that stands on the outer periphery of the pressing rod in correspondence with the position of the guide slot, moves along the guide slot to rotate the pressing rod in the axial direction, and is engaged and held in the engaging groove; Equipped with The second spring member applies a rotational restoring force to the pushing rod held by the engagement of the guide pin with the engagement groove of the guide slot, and when the engagement of the guide pin is released by pressing the pushing operation unit, the rotational restoring force moves the pushing rod to the initial position.

16. The fire hydrant device according to claim 1, The door opening mechanism includes: a hydraulic pressure generating device that is electrically driven by a pressing operation of the transmitter to generate a control hydraulic pressure; a gas spring that is provided within the housing and that holds the fire hydrant door in a closed position in a contracted initial position, and that, when supplied with the control hydraulic pressure from the hydraulic pressure generating device, releases the holding of the fire hydrant door in the closed position and expands to open the fire hydrant door to an open position; A fire hydrant device comprising:

17. The fire hydrant device according to claim 16, A fire hydrant device characterized in that the door handle of the fire hydrant door is provided with a door handle operating device that electrically drives the hydraulic pressure generating device to generate the control hydraulic pressure when a switch is closed by pressing the door handle.

18. The fire hydrant device according to claim 16, The hydraulic pressure generating device is a linear motor driven by pressing the transmitter; a hydraulic pressure generating unit having a piston slidably mounted in a cylinder, the hydraulic pressure generating unit generating the control hydraulic pressure by movement of the piston caused by the linear motor; A fire hydrant device comprising:

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