Fire hydrant system

Abstract

Even if evacuation occurs after water discharge has begun, the water discharge will not be interrupted, allowing for continuous, unmanned water discharge. [Solution] The fire hydrant device 10 includes a nozzle device 12 in which the water discharge nozzle 24 and a nozzle fixing part 22 are integrated, and the nozzle fixing part 22 is installed and fixed at the water discharge location for water discharge. The nozzle fixing part 21 includes an elevation angle adjustment mechanism that adjusts the elevation angle of the water discharge nozzle 24 on a box-shaped fixing base 22. The elevation angle adjustment mechanism extends a gas damper 34 axially by operating a damper operating button 40, continuously increasing the elevation angle of the water discharge nozzle 24, and stops and locks the extension of the gas damper 34 by releasing the operation of the damper operating button 40, setting the nozzle elevation angle to the extension stop position. The nozzle fixing base 22 becomes a water tank when a water supply valve 44 is operated, and secures weight to resist the reaction force of water discharge applied to the water discharge nozzle 24 and fixes it in place.

Description

Technical Field

[0001] The present invention relates to a fire hydrant device used for fire fighting activities in tunnels, indoor parking facilities, etc.

Background Art

[0002] Conventionally, in tunnels such as highways and motorways that are the fire fighting target areas, as emergency facilities, fire extinguishers, fire hydrant devices, and water spray facilities are installed (Patent Documents 1, 2). These emergency facilities are fire fighting facilities assuming mainly fires caused by car accidents, etc. occurring in the tunnel, and are facilities for the purpose of preventing fire spread, etc. Also, the assumed fires mainly assume fires of fuels of currently mainstream gasoline vehicles, general combustibles inside the vehicle, or cables inside the bonnet, etc.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Patent Document 2

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in recent years, from the idea of being environmentally friendly, electric vehicles (EV vehicles) that do not emit CO2 during driving have been in the spotlight and are on an increasing trend. Here, electric vehicles include hybrid vehicles, plug - in hybrid vehicles, electric vehicles, and fuel cell vehicles that load a lithium - ion battery as a high - voltage battery as a driving source or a part of the driving source. Incidentally, "EV" is an abbreviation of "Electric Vehicle", and when translated literally, it becomes "electric vehicle", but in the following description, it is treated as "electric vehicle = EV vehicle".

[0005] Fires in electric vehicles (EVs) differ from those in gasoline-powered vehicles, primarily caused by thermal runaway of lithium-ion batteries, which are high-voltage batteries. In the event of a fire, it is anticipated that current water spray systems will not be effective in extinguishing, suppressing, or preventing the spread of fire, given that the fire is caused by thermal runaway due to the electrolyte in the lithium-ion battery and the high voltage inside. Furthermore, automobile manufacturers recommend continuous spraying of large amounts of water as a method of extinguishing fires in EV vehicles.

[0006] In current tunnel emergency equipment, fire hydrants are the only system capable of concentrating and continuously discharging a relatively large amount of water. However, fire hydrants rely on people approaching the burning vehicle and spraying water at it, but since EVs have high-voltage batteries, there is a risk of electric shock if one gets too close during firefighting efforts. On the other hand, while it is necessary to continue spraying water for a long time in the event of an EV fire, from the perspective of evacuation safety, early evacuation of road users is desired, creating a conflicting situation.

[0007] The present invention aims to provide a fire hydrant system that enables unattended and continuous water discharge even when evacuation occurs after water discharge has begun. [Means for solving the problem]

[0008] (Fire hydrant system) The present invention relates to a fire hydrant system in which a fire extinguishing hose equipped with a water discharge nozzle at its tip is stored in a hose storage compartment inside the housing, and a person pulls out the fire extinguishing hose and uses the water discharge nozzle to extinguish a fire. The device is characterized by having a nozzle device that integrates a nozzle fixing unit, which is used to fix the water discharge nozzle in place at the water discharge location, with the water discharge nozzle itself.

[0009] (Storage on the back of the fire hydrant door) The nozzle device is removably stored on the back side of the fire hydrant door, which is mounted on the front of the fire hydrant device housing and can be opened and closed on its lower axis.

[0010] (Mechanism for adjusting the elevation angle of the water discharge nozzle) The nozzle fixing part is, A box-shaped mounting base on which the water spray nozzle is placed, An elevation angle adjustment mechanism for adjusting the elevation angle of the water spray nozzle on a fixed base, It is equipped with the following features. The base is a predetermined box shape that is easy for a person to carry, such as a flat gourd-shaped box.

[0011] (Gas damper elevation angle adjustment mechanism) The elevation angle adjustment mechanism is, A rotating support part that pivotally supports the rear end of the water discharge nozzle on a fixed base so that it can rotate vertically, A gas damper supports the tip of the water discharge nozzle and the mounting base at both ends in the axial direction, and rotates the water discharge nozzle vertically using the pivot support as a fulcrum due to the extension and contraction in the axial direction, An operating unit for extending and retracting the gas damper, It is equipped with.

[0012] (Gas damper extension / retraction operation) Gas dampers are It is locked to the shortest length in its initial state. When the lock is released by operating the control unit, it extends in the axial direction. If the control unit is released while the extension is in progress, it will stop and lock in the extended position at the time of release. When the lock is released by operating the control unit, the water discharge nozzle is pushed down and retracts axially. If the control unit is released while the unit is in a degraded state, it will stop and lock in the degraded position at the time of release.

[0013] (Method to prevent accidental operation of gas dampers) The gas damper's operating part is, This is an operating button that releases the lock of the gas damper by being moved by pushing in a wire cable inserted through a flexible tube. A detachable malfunction prevention member is provided to prevent accidental pressing of the operating button.

[0014] (Elevation angle adjustment mechanism via support arm operation) The elevation angle adjustment mechanism includes a rotation support portion that pivotally supports the rear end side of the water discharge nozzle in the vertical direction on a fixed base, a support arm having one end pivotally supported on the front end side of the water discharge nozzle and the other end fitted into any one of a plurality of receiving grooves arranged on the fixed base to change the elevation angle of the water discharge nozzle in multiple stages corresponding to the receiving grooves, and is provided with

[0015] (Installation and fixation by water tank) The nozzle fixing portion has the inside of the box-shaped fixed base functioning as a water tank, and when the water discharge nozzle is installed and fixed at the water discharge location, it is provided with a water supply valve that fills the water tank by supplying water from the water discharge nozzle side during water discharge by an opening operation.

[0016] <00​​​​​​​​​​​​​​​​​​​​​​The water supply valve opening / closing mechanism and the gas damper operating mechanism have an integrated mechanism to prevent accidental operation. By detaching the malfunction prevention component from the gas damper's operating section in conjunction with the opening operation of the water supply valve, the operating button can be pressed.

[0018] (Fixed in place by a piston-cylinder mechanism) The nozzle fixing section is equipped with piston-cylinder mechanisms located at multiple points on the fixing base. When the water discharge nozzle is permanently fixed in place at the water discharge location, the water supply valve is opened to supply water from the nozzle side to the cylinder chamber of the piston-cylinder mechanism, causing the legs, which are attached to the piston via a rod, to press against the road surface at the water discharge location.

[0019] (Fixed in place by filling and extending a flat hose with water) The nozzle fixing section is equipped with multiple flat hoses with closed ends that are wound up and connected and fixed to multiple locations on both sides of the water supply pipe, which is positioned in the direction of water discharge on the fixing base. When the water discharge nozzle is fixed in place at the water discharge location, it is equipped with a water supply valve that supplies water from the water discharge nozzle side to the water supply pipe while water is being discharged, fills multiple flat hoses that are wound around both sides of the water supply pipe and fixed together, and extends outwards from both sides of the mounting base as support legs.

[0020] (A water discharge nozzle with a curved shape and a set elevation angle) The water spray nozzle is, It consists of a spear-shaped tube section at the rear end of the nozzle and a nozzle section at the front end of the nozzle. The spear tube section has a horizontal section at the rear end that is positioned parallel to the upper surface of the nozzle fixing base, followed by an upward-facing section at the tip that is bent upward at a predetermined minimum elevation angle. The nozzle section has its rear end connected to the tip of the spear-shaped pipe section, with the water outlet opening at the tip. [Effects of the Invention]

[0021] (Effectiveness of fire hydrant systems) The present invention relates to a fire hydrant system in which a fire extinguishing hose with a water discharge nozzle attached to its tip is stored in a hose storage section within the housing, and a person pulls out the fire extinguishing hose and uses the water discharge nozzle (fire extinguishing nozzle) to extinguish a fire. The present invention is equipped with a nozzle device in which the water discharge nozzle and a nozzle fixing section are integrated, allowing for unmanned water discharge where the water discharge nozzle is fixed in place at the water discharge location after a person operates the fire hydrant system to start water discharge. This makes it possible to discharge a large amount of water for a long period of time using the fire hydrant in the event of a fire in an electric vehicle (EV), without a person having to directly and continuously perform water discharge activities, thereby effectively extinguishing the fire or preventing its spread, enabling early evacuation, and since the water discharge nozzle does not move around during water discharge, it enables safe evacuation without causing congestion of evacuees.

[0022] Furthermore, even in the case of a gasoline vehicle fire, unmanned water discharge allows for prolonged water discharge without the need for continuous human intervention, enabling earlier evacuation.

[0023] Furthermore, because the water discharge nozzle and nozzle fixing part are integrated into a single structure, users do not need to carry them separately, and it can be easily installed and fixed in place at the water discharge location, such as roads or monitoring walkways. In addition, the integrated structure of the water discharge nozzle and nozzle fixing part contributes to weight reduction, and the mechanism for stabilizing against nozzle reaction force is designed to remain in place when being carried and activate when being installed, making it easy to install and fix in place.

[0024] (The effect of storage on the back of the fire hydrant door) Furthermore, the nozzle device is removably stored on the back side of the fire hydrant door, which is mounted on the front of the fire hydrant device housing and can be opened and closed on its lower axis. This allows a person to easily remove the integrated water discharge nozzle and nozzle fixing part by opening the fire hydrant door, and carry it to the water discharge location while extending the fire hose.

[0025] (Effect of the elevation angle adjustment mechanism for the water discharge nozzle) Furthermore, the nozzle fixing unit includes a box-shaped fixing base on which the water discharge nozzle is placed, and an elevation angle adjustment mechanism on the fixing base for adjusting the elevation angle of the water discharge nozzle. This allows a person to adjust the elevation angle of the water discharge nozzle so that the water reaches the burning vehicle when the unit is fixed in place at the water discharge location. In addition, the fixing base has a predetermined box shape that is easy for a person to carry, for example, a flat gourd-shaped box. Therefore, when a person carries it under their arm, the gourd-shaped recessed part can be placed against the waist, making it easy to carry even though the fixing base is integrated with the water discharge nozzle.

[0026] (Effect of the gas damper's elevation angle adjustment mechanism) Furthermore, the elevation angle adjustment mechanism includes a pivot support that pivotally supports the rear end of the water discharge nozzle on a fixed base so that it can rotate vertically, a gas damper that supports the front end of the water discharge nozzle and the fixed base at both ends in the axial direction and rotates the water discharge nozzle vertically with the pivot support as a fulcrum by the extension and contraction in the axial direction, and an operating unit that operates the extension and contraction of the gas damper. In this case, the gas damper of the elevation angle adjustment mechanism is locked to its shortest length in the initial state, extends axially when the lock is released by operating the operating unit, and stops and locks at the extended position at the time of release when the operating unit is released. When the lock is released, the water discharge nozzle is pushed down, causing it to retract axially. If the control unit is released during this retraction, the nozzle stops and locks in the retracted position at the time of release. Therefore, when a person releases the lock on the gas damper using the control unit, the elevation angle of the water discharge nozzle continuously increases from the initial position where the elevation angle is minimum due to the extension of the gas damper. By releasing the control unit at the appropriate position where the water can reach, the extension of the gas damper can be stopped and locked, making it easy to set the elevation angle of the water discharge nozzle to any angle between the minimum and maximum elevation angles. Furthermore, if the elevation angle is raised too high, it can be easily adjusted downwards by pushing down the water discharge nozzle while the control unit is released. In addition, since the extension and retraction of the gas damper can be performed continuously, fine adjustments are easily possible.

[0027] (Effect of the gas damper malfunction prevention component) Furthermore, the gas damper's operating mechanism is an operating button that releases the lock on the gas damper by pushing a wire cable inserted through a flexible tube. A detachable malfunction prevention member is provided to prevent accidental pushing of the operating button. Therefore, while a person is opening the fire hydrant door of the fire hydrant system, taking out the nozzle device, and carrying it to the water discharge location, there is a possibility that the operating button of the gas damper may be unintentionally pushed and malfunctioned depending on how the nozzle device is held. By attaching the malfunction prevention member to the operating mechanism, the operating button will not move even if a pushing force is applied, thus reliably preventing malfunctions.

[0028] (Effect of the elevation angle adjustment mechanism via the operation of the support arm) Furthermore, the elevation angle adjustment mechanism includes a pivot support that pivotally supports the rear end of the water discharge nozzle on a fixed base so that it can rotate vertically, and a support arm whose one end is pivotally supported on the front end of the water discharge nozzle and whose other end fits into one of several receiving grooves located on the fixed base, thereby changing the elevation angle of the water discharge nozzle in multiple stages according to the receiving groove. Therefore, by selectively fitting the support arm into the receiving groove on the fixed base, it is possible to easily set the appropriate elevation angle so that water can reach the burning vehicle. In addition, because the elevation angle adjustment mechanism has a simple structure consisting of a support arm and multiple receiving grooves, the nozzle device is lightweight and can be easily carried by a person.

[0029] (Effect of securing the unit with a water tank) Furthermore, the nozzle fixing section has a box-shaped fixing base that functions as a water tank, and when the water discharge nozzle is fixed in place at the water discharge location, it is equipped with a water supply valve that, when opened, supplies water from the water discharge nozzle side to fill the water tank while water is being discharged. By filling the water supply for firefighting to the water discharge nozzle with water and using the fixing base as a weight, it becomes easy and reliable to add weight and fix the nozzle in place to resist the reaction force of water discharge applied to it.

[0030] (The effectiveness of the water tank due to the lightweight structure of the mounting base and the flexible water bag) Furthermore, the box-shaped mounting base has a lightweight structure consisting of closed surfaces forming the top and front and rear sides in the direction of water discharge, open surfaces forming the left and right sides, and a bottom surface forming a grid-like surface with multiple frame plate members arranged at intervals. Inside the lightweight mounting base, a flexible water bag that functions as a water tank is housed, which is filled with water supplied by opening the water supply valve. As a result, the nozzle device, which consists of the mounting base and the water discharge nozzle, is lightweight and easy to carry to the water discharge location.

[0031] (Effect of the interlocking operation mechanism between the water tank supply valve and the gas damper malfunction prevention component) Furthermore, the gas damper's operating mechanism is an operating button that releases the lock of the gas damper by pushing a wire cable inserted through a flexible tube, and a detachable malfunction prevention member is provided to prevent accidental pushing of the operating button. The nozzle fixing part has a box-shaped fixing base that functions as a water tank, and when the water discharge nozzle is fixed in place at the water discharge location, it is equipped with a water supply valve that, when opened, supplies water from the water discharge nozzle side to fill the water tank, and the nozzle device has an operating mechanism for opening and closing the water supply valve and a malfunction prevention member for the gas damper's operating mechanism. The design integrates a mechanism that prevents accidental operation, which detaches from the gas damper's operating section in conjunction with the opening of the water supply valve. This allows the operating button to be pressed. Therefore, when a person carries the nozzle device to a water discharge location and places it in a stationary position for water discharge, opening the water supply valve of the water tank, such as a ball valve, detaches the accidental operation prevention member of the gas damper operating section, which is integrated with the opening / closing lever, allowing operation. This enables water supply to the water tank and adjustment of the elevation angle of the water discharge nozzle by unlocking the gas damper to be performed in a single operation, thereby improving operability.

[0032] (Effect of fixed installation using a piston-cylinder mechanism) Furthermore, the nozzle fixing section is equipped with piston-cylinder mechanisms located at multiple points on the fixing base. When the water discharge nozzle is fixed in place at the water discharge location, water is supplied to the cylinder chamber of the piston-cylinder mechanism from the water discharge nozzle side by opening the water supply valve, causing the legs, which are connected to the piston via a rod, to press against the road surface at the water discharge location. This makes it possible to easily drive the piston-cylinder mechanism using the fire extinguishing water supplied to the water discharge nozzle. In addition, when the legs are pressed against the road surface at the water discharge location by the drive of the piston, the fixing base rises, adjusting the water discharge nozzle to a higher position. Moreover, the weight of the water-filled fire extinguishing hose is added to the fixing base, increasing the pressing load, making it easy and reliable to add weight and fix the nozzle in place to resist the reaction force of the water discharge.

[0033] (Effect of securing the flat hose by filling it with water and extending it) Furthermore, the nozzle fixing section is equipped with multiple flat hoses with closed ends that are wound around and connected and stored at multiple locations on both sides of the water supply pipe, which is positioned in the direction of water discharge on the fixing base. When the water discharge nozzle is fixed in place at the water discharge location, a water supply valve is provided that supplies water from the water discharge nozzle side to the water supply pipe while water is being discharged, filling the multiple flat hoses that are wound around and connected and fixed on both sides of the water supply pipe with water, and extending outwards from both sides of the fixing base as support legs. As a result, the water supplied to the water discharge nozzle can be used to fill the wound flat hoses and extend them as legs, and the legs formed by the water-filled multiple flat hoses extend on both sides of the nozzle device and come into contact with the road surface, making it easy and reliable to add weight and fix the nozzle in place to resist the reaction force of water discharge applied to it.

[0034] (Effect of a curved water discharge nozzle with a set elevation angle) Furthermore, the water discharge nozzle consists of a spear-shaped section at the rear end of the nozzle and a nozzle section at the front end. The spear-shaped section has a horizontal section at the rear end that is positioned parallel to the top surface of the mounting base, followed by an upward-facing section at the front end that is bent upward at a predetermined minimum elevation angle. The nozzle section has its rear end connected to the front end of the spear-shaped section, and the water discharge port is opened at the front end. Therefore, when the water discharge nozzle and the nozzle mounting part are integrated, a predetermined minimum elevation angle is set in advance at the front end. This makes it possible for a person to easily carry the nozzle device to the water discharge location while extending the water discharge distance by spraying the fire extinguishing water upward. [Brief explanation of the drawing]

[0035] [Figure 1] This is an explanatory diagram showing unmanned water discharge by the fire hydrant system of this embodiment installed inside a tunnel. [Figure 2] This is an explanatory diagram showing a fire hydrant system from the front. [Figure 3] This is an explanatory diagram showing the internal structure of a fire hydrant system from the front, with all doors in the open position. [Figure 4] This is an explanatory diagram showing a cross-section of a fire hydrant door in its open position, viewed from a plan view. [Figure 5] This is an explanatory diagram showing a first embodiment of the nozzle device. [Figure 6] Figure 5 is an explanatory diagram showing the water discharge state when the elevation angle of the nozzle device is adjusted. [Figure 7] This is an explanatory diagram showing the gas damper used for adjusting the elevation angle, as shown in Figure 5. [Figure 8] This is an explanatory diagram showing a nozzle device in which the nozzle section of Figure 5 is a detachable water-discharge nozzle. [Figure 9] This is an explanatory diagram showing the gas damper operating button equipped with the malfunction prevention member shown in Figure 5. [Figure 10] This is an explanatory diagram showing the interlocking operation mechanism between the water supply valve and the gas damper operating unit for the fixed base. [Figure 11] This is an explanatory diagram showing a second embodiment of the nozzle device. [Figure 12]This is an explanatory diagram showing the stopper portion of the nozzle device in Figure 11, taken out of the diagram. [Figure 13] Figure 11 is an explanatory diagram showing the water discharge state when the elevation angle of the nozzle device is adjusted. [Figure 14] This is an explanatory diagram showing a first embodiment of the nozzle fixing part. [Figure 15] This is an explanatory diagram showing a modified example of the first embodiment in which the nozzle fixing part has been made lighter. [Figure 16] This is an explanatory diagram showing a second embodiment of the nozzle fixing part. [Figure 17] This is an explanatory diagram showing a third embodiment of the nozzle fixing part. [Figure 18] Figure 17 is an explanatory diagram showing the state in which water is supplied to the nozzle fixing part and the flat hose is extended. [Modes for carrying out the invention]

[0036] Embodiments of the fire hydrant device according to the present invention will be described below with reference to the drawings. However, the present invention is not limited to the following embodiments.

[0037] [Basic Concepts of the Embodiment] First, the basic concept of the embodiment will be explained. The embodiment generally relates to a fire hydrant system in which a fire extinguishing hose with a nozzle device attached to its tip is stored in a hose storage section inside the housing, and a person pulls out the fire extinguishing hose and performs fire extinguishing activities with a water discharge nozzle (fire extinguishing nozzle).

[0038] Here, "fire hydrant system" refers to a type of emergency equipment installed in areas that are subject to fire extinguishing, such as tunnels on expressways and motorways. It houses and installs fire hydrant equipment such as fire hoses, and may also include emergency notification devices such as red indicator lights and transmitters, or house fire extinguishers.

[0039] Furthermore, in the "fire hydrant device" of this embodiment, a nozzle device is provided in which a nozzle fixing part for installing and fixing the water discharge nozzle at the water discharge location and a water discharge nozzle are integrated.

[0040] Here, "the nozzle fixing part and the water discharge nozzle are integrated" means that the water discharge nozzle is positioned on top of the nozzle fixing part, and during firefighting operations, a person takes the water discharge nozzle with the integrated nozzle fixing part from the fire hydrant device and carries it to the water discharge location to discharge water. Water discharge operations can be carried out either by a person holding the nozzle device with the integrated nozzle fixing part and water discharge nozzle, or by an unmanned person fixing the nozzle device at the water discharge location and discharging water.

[0041] Therefore, according to the fire hydrant device of this embodiment, by operating the fire hydrant device to start water discharge and then fixing the nozzle device in place at the water discharge location to allow water to be discharged unmanned, it becomes possible to discharge a large amount of water for a long period of time using the fire hydrant in the event of a fire in an electric vehicle (EV), without a person having to directly and continuously discharge water. This effectively extinguishes the fire or prevents its spread, and also allows the person carrying out firefighting activities to evacuate earlier.

[0042] Furthermore, even in the case of a gasoline vehicle fire, unmanned water discharge allows for prolonged water discharge without the need for continuous human intervention, enabling earlier evacuation.

[0043] Furthermore, since the nozzle device has an integrated structure for the water discharge nozzle and the nozzle fixing part, users do not need to carry these separately, and it can be easily installed and fixed in place at the water discharge location, such as roads or monitoring walkways.

[0044] Furthermore, the nozzle unit is removably stored on the back side of the fire hydrant door, which is mounted on the front of the fire hydrant housing and can be opened and closed on its lower axis. As a result, by opening the fire hydrant door, a person can easily remove the integrated water discharge nozzle and nozzle fixing part, and carry it to the water discharge location while extending the fire hose.

[0045] Furthermore, the nozzle fixing unit is equipped with a fixing base and an elevation angle adjustment mechanism. Here, the "fixing base" is on which the water discharge nozzle is placed. The "elevation angle adjustment mechanism" is a mechanism that adjusts the elevation angle of the water discharge nozzle on the fixing base, and when a person sets up and fixes the nozzle fixing unit at the water discharge location, it is possible to change the elevation angle of the water discharge nozzle to adjust it so that the water can reach the burning vehicle.

[0046] Furthermore, the "fixing stand" has a predetermined box shape that is easy for a person to carry, such as a flat, gourd-shaped box. Therefore, when a person carries it under their arm, the gourd-shaped recessed part of the fixing stand can be placed against the waist, making it easier to hold and carry even if the fixing stand is integrated with the water spray nozzle.

[0047] Furthermore, the configuration of the "elevation angle adjustment mechanism" is arbitrary, but it can be either a mechanism that continuously changes the elevation angle by operating a gas damper, or a mechanism that changes the elevation angle in multiple stages by manual operation.

[0048] The "elevation angle adjustment mechanism using a gas damper" consists of a rotating support part for the water discharge nozzle, a gas damper, and an operating part for the gas damper. Here, the "rotating support part for the water discharge nozzle" is a part that pivotally supports the rear end of the water discharge nozzle on a fixed base so that it can rotate vertically. The "gas damper" is a mechanical element including a gas spring that lifts and holds an object or suppresses the vibration and movement of an object. In this embodiment, it supports the tip of the water discharge nozzle and the fixed base at both ends in the axial direction, and the elevation angle of the water discharge nozzle is changed by rotating the water discharge nozzle vertically with the rotating support part as a pivot point due to the expansion and contraction in the axial direction. The "operating part for the gas damper" is for operating the expansion and contraction of the gas damper.

[0049] Furthermore, the "gas damper of the elevation angle adjustment mechanism" is initially locked to its shortest length. When the lock on the gas damper is released by operating the control unit, it extends axially due to the gas pressure. When the control unit is released during extension, it stops and locks in the extended position at the time of release.

[0050] Furthermore, "gas damper contraction" refers to the axial contraction of the gas damper when the water discharge nozzle is manually pushed down while the lock on the gas damper is released by operating the control unit. If the operation of the control unit is released while the gas damper is contracting, it will stop and lock in the contracted position at the time of release.

[0051] With this type of elevation angle adjustment mechanism, when the device is fixed in place at the water discharge location using a mounting base, a person can release the lock on the gas damper by operating the control unit. This causes the elevation angle of the water discharge nozzle to continuously increase from the initial position where the elevation angle is minimum, as the gas damper extends. By releasing the control unit at the appropriate position where the water can reach, the extension of the gas damper can be stopped and locked, making it easy to set the elevation angle of the water discharge nozzle to any elevation angle up to the maximum elevation angle.

[0052] Furthermore, the "gas damper operating section" is an operating button that releases the lock of the gas damper by pushing a wire cable inserted through a flexible tube, and a malfunction prevention member is detachably provided to prevent accidental pushing of the operating button.

[0053] Therefore, while a person opens the fire hydrant door of the fire hydrant system, takes out the nozzle unit, and carries it to the water discharge location, there is a possibility that the gas damper operating button may be unintentionally pressed and misoperated depending on how the nozzle unit is held. However, by attaching a misoperation prevention member to the operating part, the operating button will not move even if pressure is applied to it, making it possible to reliably prevent misoperation.

[0054] Furthermore, the "elevation angle adjustment mechanism that allows for multi-stage adjustment of the elevation angle by manual operation" consists of a rotating support section, a receiving groove, and a support arm.

[0055] Here, the "rotating support part" is a component that pivotally supports the rear end of the water discharge nozzle on a fixed base so that it can rotate vertically. The "support arm" has one end pivotally supported on the front end of the water discharge nozzle and the other end fitted into one of the "multiple receiving grooves" located on the fixed base, allowing the elevation angle of the water discharge nozzle to be changed in multiple stages in accordance with the receiving groove.

[0056] Therefore, by selectively fitting the support arm into one of the multiple receiving grooves on the base, it is possible to easily set the appropriate elevation angle so that water can reach the burning vehicle. Furthermore, because the elevation angle adjustment mechanism has a simple structure consisting of a support arm and multiple receiving grooves, the nozzle device is lightweight and can be easily carried by a person.

[0057] Furthermore, the "nozzle fixing unit" has a water tank inside a box-shaped fixing base, and when the water discharge nozzle is fixed in place at the water discharge location, it is equipped with a water supply valve that supplies water from the water discharge nozzle side to fill the water tank while water is being discharged. Therefore, by filling the water tank with fire extinguishing water supplied to the water discharge nozzle by opening the water supply valve and using the fixing base as a weight, it becomes easy and reliable to add weight and fix the nozzle in place to resist the reaction force of water discharge applied to it.

[0058] Furthermore, the box-shaped mounting base incorporates a lightweight structure. The lightweight structure of the mounting base is arbitrary, but for example, it consists of closed surfaces forming the top surface and the front and rear sides facing the water discharge direction, open surfaces forming the left and right sides, and a bottom surface forming a grid-like surface with multiple frame plate members arranged at intervals. The weight can be further reduced if the mounting box is made of aluminum or synthetic resin. Inside the lightweight mounting base is a flexible water bag, such as a rubber bag, which functions as a water tank when filled with water supplied by opening the water supply valve.

[0059] Therefore, the lightweight structure of the mounting base and the water bag of the water tank reduce the weight of the nozzle mounting section, and consequently, the entire nozzle device, including the integrated water discharge nozzle, becomes lighter. The reduced weight of the nozzle mounting section makes it easier for people to carry the nozzle device to the water discharge location.

[0060] Furthermore, since operating the gas damper control unit and the water tank's water supply valve separately is cumbersome, this embodiment integrates the operating functions of both.

[0061] The gas damper's operating mechanism is an operating button that releases the lock on the gas damper by pushing a wire cable (push-pull wire cable) inserted through a flexible tube. A detachable anti-misoperation member is provided to prevent accidental pushing of the operating button. The water supply valve, when opened, supplies firefighting water to the water discharge nozzle and fills the water tank with water to act as a weight.

[0062] Therefore, in this embodiment, the opening and closing operation part (opening / closing lever) of the water supply valve and the malfunction prevention member (malfunction prevention plate) of the gas damper operation part are integrated, and the malfunction prevention member is detached from the gas damper operation part in conjunction with the opening operation of the opening and closing lever of the water supply valve, thereby enabling the operation button to be pressed.

[0063] Therefore, when a person carries the nozzle device to the water discharge location and sets it up for discharge, if the opening / closing lever of the water tank's water supply valve, such as a ball valve, is opened, the malfunction prevention member of the gas damper operating section, which is integrated with the opening / closing lever, detaches, allowing operation. This makes it possible to supply water to the water tank and detach the malfunction prevention member of the damper operating section with a single operation, thereby improving operability.

[0064] Furthermore, the "nozzle fixing section" consists of a piston-cylinder mechanism and a water supply valve. Here, the "piston-cylinder mechanism" is provided at multiple locations on the fixing base, and a rod of a piston slidably mounted on the cylinder is connected to a leg that functions as an anti-slip part. The "water supply valve" is used when the water discharge nozzle is fixed in place at the water discharge location. By opening the valve, water is supplied from the water discharge nozzle side to the cylinder chamber of the piston-cylinder mechanism while water is being discharged, causing the leg, which is positioned on the piston via the rod, to press against the road surface at the water discharge location.

[0065] Therefore, the piston-cylinder mechanism can be easily driven using the fire extinguishing water supplied to the water discharge nozzle. Furthermore, when the legs are pressed against the road surface or other surface at the water discharge location by the drive of the piston, the base rises, adjusting the water discharge nozzle to a higher position. In addition, the weight of the water-filled fire extinguishing hose is added to the base, increasing the pressing load. This makes it easy and reliable to add weight and fix the nozzle in place to resist the reaction force of the water discharge.

[0066] Furthermore, the "nozzle fixing section" has a structure that allows it to be fixed in place by filling and unfolding the flat hose with water.

[0067] In this case, the "nozzle fixing section" consists of multiple flat hoses and a water supply valve. Here, the "flat hoses" are connected and fixed in a wound state at multiple locations on both sides of the water supply pipe, which is positioned in the direction of water discharge on the fixing base, and their ends are closed. The "water supply valve" is used when the water discharge nozzle is fixed in place at the water discharge location. It supplies water from the water discharge nozzle side to the water supply pipe while water is being discharged, filling the multiple flat hoses that are connected and fixed in a wound state on both sides of the water supply pipe with water, and causing them to extend outwards from both sides of the fixing base as support legs.

[0068] Therefore, by using the firefighting water supplied to the water discharge nozzle to fill the wound flat hose, it becomes possible to deploy it as a leg section. The legs formed by filling multiple flat hoses with water extend from both sides of the nozzle device and make contact with the road surface, making it easy and reliable to add weight and fix it in place to resist the reaction force of the water discharge applied to the water discharge nozzle.

[0069] Furthermore, the "water discharge nozzle" consists of a spear-tube section and a nozzle section. Here, the "spear-tube section" is a pipe member that has a horizontal section at the rear end that is positioned parallel to the upper surface of the fixed base, followed by an upward-facing section at the front end that is bent upward at a predetermined minimum elevation angle. The "nozzle section" is a member whose rear end is connected to the tip of the spear-tube section, with a water discharge port opening at the tip.

[0070] Therefore, when the water discharge nozzle and the nozzle fixing part are integrated, a predetermined minimum elevation angle is set in advance on the tip side, making it possible to easily carry the nozzle device to the water discharge location while extending the water discharge distance by spraying fire extinguishing water upwards.

[0071] The following describes specific embodiments. In these embodiments, "electric vehicle" is referred to as "EV vehicle," the "water discharge nozzle elevation angle adjustment mechanism" is described in two parts: "first embodiment using a gas damper" and "second embodiment using manual operation," and the "nozzle fixing part" is described in three parts: "first embodiment constituting a water tank," "second embodiment using a piston-cylinder mechanism," and "third embodiment using a flat hose."

[0072] Furthermore, we will explain the case where the "device in which the nozzle fixing part and the water discharge nozzle are integrated" is called a "nozzle device," the "water discharge nozzle" consists of a "spear pipe" and a "nozzle part," and the "nozzle fixing part" consists of a "water tank," a "piston / cylinder mechanism," or a "flat hose."

[0073] [Specific details of the embodiment] The fire hydrant system of this embodiment will be described in detail as follows: a. Unattended water discharge from fire hydrant systems b. Fire hydrant system b1. Structure of a fire hydrant system b2. Internal structure of a fire hydrant system c. First embodiment of a nozzle device c1. Water discharge nozzle and nozzle fixing part c2.Elevation angle adjustment mechanism c3. Gas damper c4. Detachable nozzle c5. Misoperation prevention mechanism c6. Interlocking operation of the water supply valve and the malfunction prevention mechanism. d. Second embodiment of the nozzle device e. First embodiment of the nozzle fixing part f. Modified example of the first embodiment of the nozzle fixing part g. Second embodiment of the nozzle fixing part h. Third embodiment of the nozzle fixing part i. Modified form of the present invention

[0074] [a. Unattended water discharge from fire hydrants] The unmanned water discharge using the fire hydrant system of this embodiment will be described. In this description, refer to Figure 1, which shows the unmanned water discharge using the fire hydrant system of this embodiment installed inside a tunnel.

[0075] As shown in Figure 1, a guard walkway 18 is constructed along the shoulder of the road 16 inside the tunnel. Fire hydrant devices 10 are installed in the cutouts in the tunnel wall along the guard walkway 18, and these fire hydrant devices 10 are installed, for example, at intervals of 50 meters.

[0076] In this embodiment, the fire hydrant system 10 has a nozzle device 12, which integrates a nozzle fixing part and a water discharge nozzle, housed on the back of the fire hydrant door. If a car fire occurs in a tunnel due to an accident, for example, in an EV vehicle 20, a road user such as the driver opens the fire hydrant door of the fire hydrant system 10, takes out the nozzle device 12, and carries it towards the burning EV vehicle 20, for example, by walking along the road 16, while discharging water.

[0077] In the event of a fire in an EV vehicle 20 equipped with a lithium-ion battery, it is necessary to continue spraying water from the nozzle device 12. However, it is difficult for a person to continuously spray water against the high temperature and intense flames, and it is also necessary to evacuate quickly. Therefore, unmanned water discharge is required, where the nozzle device 12 is fixed in place on a location such as a road 16 to allow for continuous water discharge.

[0078] The nozzle device 12 is equipped with a nozzle fixing part integrated with the water discharge nozzle. Road users can simply place it on the road surface at the water discharge location, and it will be securely fixed against the reaction force of the water discharge. Even after road users have evacuated the location, it will be possible to continue unattended water discharge on the burning EV vehicle 20. Firefighters will arrive and carry out necessary firefighting activities while unattended water discharge from the nozzle device 12 is continuing.

[0079] In this embodiment, the water discharge from the fire hydrant system 10 is effective not only for EV vehicle fires but also for regular gasoline vehicle fires. In situations where evacuation is urgent, road users can carry the nozzle device 12 to the water discharge location and fix it in place. Even if road users evacuate from that location, water discharge can continue unattended.

[0080] [b. Fire hydrant system] Next, the fire hydrant device of the embodiment will be described. In this description, refer to Figure 2, which shows the fire hydrant device from the front; Figure 3, which shows the internal structure of the fire hydrant device from the front with each door in the open position; and Figure 4, which shows a cross-sectional view from above with the fire hydrant door in the open position.

[0081] In the explanation of Figures 2 to 4, the X, Y, and Z directions are mutually orthogonal. Specifically, when viewing the front of the fire hydrant device 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-back direction. Furthermore, in the X direction, the +X side is the right side and the -X side is the left side; in the Y direction, the +Y side is the upper side and the -Y side is the lower side; and in the Z direction, the +Z side is the front side and the -Z side is the rear side. This also applies to Figures 5, 6 to 16, which show the nozzle device.

[0082] (b1. Structure of fire hydrant system) First, let's explain the structure of the fire hydrant system. As shown in Figure 2, the fire hydrant system 10 has a structure divided into a housing 110a, which houses the fire hydrant, and a housing 110b, which houses the fire extinguisher. Decorative frames 111a and 111b are attached to the front of the housings 110a and 110b.

[0083] The door opening of the decorative frame 111a of the housing 110a is divided into upper and lower sections. A forward-tilting fire hydrant door 116 that opens downward by hinge 116a is provided on the lower side of the door opening, and a maintenance door 118 that opens upward by hinge 118a is provided on the upper side of the door opening. Inside the fire hydrant storage section, fire hydrant equipment including a fire hose and valves including a fire hydrant valve is stored. The fire hydrant door 116 is provided with a door handle 117, and when a road user pulls the door handle 117 towards them, the lock is released and the fire hydrant door 116 can be opened.

[0084] On the left side of the door opening of the decorative frame 111b of the housing 110b, there is a fire extinguisher door 122 that opens horizontally to the left by a hinge 122a, and the fire extinguisher storage area inside can accommodate, for example, two fire extinguishers. The fire extinguisher door 122 is equipped with a door handle 123, and when a road user pulls the door handle 123 towards them, the lock is released and the fire extinguisher door 122 can be opened. In addition, a viewing window 127 is provided on the lower side of the fire extinguisher door 122, allowing the presence or absence of fire extinguishers to be checked from the outside.

[0085] On the right side of the door opening of the decorative frame 111b, an electrical door 124 is provided that opens horizontally to the right by a hinge 124a. The electrical door 124 is equipped with electrical equipment such as a red indicator light 126, a transmitter 128, and a response lamp 130, and a telephone jack is provided inside the housing 110b of the electrical door 124. Thus, the red indicator light 126, transmitter 128, response lamp 130, and telephone jack provided on the electrical door 124 constitute an emergency notification device.

[0086] The red indicator light 126 is always illuminated so that the location of the fire hydrant device 10 can be seen from a distance. When a vehicle fire occurs in the tunnel and the transmitter 128 is pressed, turning on the push button switch, a fire alarm signal is transmitted, and a fire alarm is output from the disaster prevention receiving panel installed in the electrical room or elsewhere that receives this signal. The fire hydrant device 10 receives fire pump activation and response signals from the disaster prevention receiving panel, and the red indicator light 126 flashes and the response lamp 130 lights up in response to the respective signals.

[0087] (b2. Internal structure of a fire hydrant system) Next, the internal structure of the fire hydrant device 10 shown in Figure 2 will be described. As shown in Figure 3, on the right side inside the housing 110a, which serves as the fire hydrant storage section, a water tap 150 is connected to a water supply pipe 148 that is drawn in from the outside. The water supply pipe 148 also branches downward and is connected to a fire hose 14 via a fire hydrant valve 152 and an automatic pressure regulating valve 154.

[0088] A hose storage frame 164 is provided on the left side inside the housing 110a, and the fire extinguishing hose 14, which is pulled in from below, is stored by being wound inward in a clockwise or counterclockwise direction. A water discharge nozzle 24 is attached to the tip of the fire extinguishing hose 14, which is pulled out through a hose guide 166 installed on the back side of the fire hydrant door 116. As shown in Figure 4, the water discharge nozzle 24 in this embodiment is integrated with a nozzle fixing part 21 to form a nozzle device 12, and the nozzle device 12 is stored on the back side of the fire hydrant door 116 so that it can be easily removed.

[0089] The fire hydrant valve 152 is opened and closed by a fire hydrant valve opening / closing lever 156 provided in an operation box 155 installed on the back side of the fire hydrant door 116. The fire hydrant valve 152 is opened and closed in conjunction with the opening and closing operation of the fire hydrant valve opening / closing lever 156 by a known wire link mechanism provided between the operation box 155 and an interlocking box 168 provided on the fire hydrant valve 152 corresponding to the operation box 155.

[0090] Furthermore, a pump activation interlocking switch 143, which is turned on and off in response to the opening and closing of the fire hydrant valve 152, is provided in the interlocking box 168, and a pump activation switch 142 for use by the fire brigade is provided to the upper right of the water tap 150.

[0091] Furthermore, two fire extinguishers 140 are housed inside the enclosure 110b (inside the fire extinguisher door). Terminal boxes 134 and 136 are installed on the rear of the enclosure 110b. A red indicator light 126, provided on the electrical door 124, is connected to terminal box 134 via a wiring cable, and a transmitter 128, response lamp 130, telephone jack 132, pump start switch 142, and pump start interlock switch 143, provided on the electrical door 124, are connected to terminal box 136 via wiring cables.

[0092] Furthermore, a cable rack 170 is installed at the top of the enclosure 110a. The cable rack 170 is used to pass through high-voltage cables that are brought in from the outside to connect to the terminal box 134, low-voltage cables that are brought in from the outside to connect to the terminal box 136, and wiring cables that connect the pump start switch 142 and the pump start interlock switch 143 to the terminal box 136.

[0093] [c. First embodiment of the nozzle device] Next, a first embodiment of the nozzle device will be described. In this description, refer to Figure 5, which shows the first embodiment of the nozzle device, and Figure 6, which shows the water discharge state with the elevation angle of the nozzle device in Figure 5 adjusted. Figures 5(A) and 6 show the front view of the nozzle device, and Figure 5(B) shows the top view of the nozzle device.

[0094] (c1. Water spray nozzle and nozzle fixing part) As shown in Figure 5, the nozzle device 12 of this embodiment consists of a nozzle fixing part 21 and a water discharge nozzle 24.

[0095] As shown in Figure 5(B), the nozzle fixing part 21 is a fixed stand 22 in the shape of a flat, gourd-shaped box, for example, that is easy for a person to carry. Anti-slip feet 25 are placed at four locations on the bottom, ensuring that the nozzle can be fixed in place when it is set up at the water discharge site. The fixed stand 22 is shaped so that when a person carries the nozzle device 12 under their arm, the gourd-shaped indentation can be placed against the waist, making it easier to carry the nozzle device 12. In addition, the fixed stand 22 is made of aluminum, synthetic resin, or a composite structure of both in order to reduce weight, and the inside of the fixed stand 22 is used as a water tank by filling it with fire extinguishing water.

[0096] Therefore, a water supply pipe 42 is connected to the side of the water discharge nozzle 24, a water supply valve 44 is provided in the water supply pipe 42, and a flexible hose 43 is connected from the water supply valve 44 to the water inlet 56 of the fixing base 22. When the water supply valve 44 is opened while water is being discharged from the water discharge nozzle 24, the fire extinguishing water fills the water tank inside the fixing base 22, which functions as a weight and helps to fix the base in place against the reaction force associated with the water discharge.

[0097] The water discharge nozzle 24 consists of a spear-shaped section 2410 at the rear end (left side) and a nozzle section 2412 at the front end (right side). For example, the nozzle section 2412 is screwed into and fixed to the tip of the spear-shaped section 2410. The spear-shaped section 2410 consists of a horizontal section parallel to the upper surface of the nozzle fixing base 22 followed by an upward-bent section that bends upward to a predetermined minimum elevation angle. The minimum elevation angle is arbitrary, but is, for example, around a few degrees.

[0098] A hose connection section 28 is provided at the rear end of the spear pipe section 2410, and the tip of the fire extinguishing hose 14 is detachably connected to it. The nozzle section 2412 has a nozzle opening at its tip, and a handle 26 is attached to the top. Therefore, during firefighting operations, a person can hold the nozzle device 12 in their right hand and grip the handle 26 with their left hand to determine the direction of water discharge from the nozzle section 2412.

[0099] (c2. Elevation angle adjustment mechanism) Next, the elevation angle adjustment mechanism for the water discharge nozzle 24 provided in the nozzle device 12 will be described.

[0100] As shown in Figure 5, the rear end of the spear-shaped tube section 2410 of the water discharge nozzle 24 is pivotally supported by a pivot shaft 30 on a bearing member 32 fixed to a fixing base 22 of the nozzle fixing section 21, allowing it to rotate vertically. This allows the water discharge direction of the nozzle section 2412 at the front end, i.e., the water discharge center 2414, to be rotated vertically, thereby adjusting the elevation angle.

[0101] In this embodiment, the elevation angle of the water discharge nozzle 24 is adjusted by a gas damper 34. As shown in Figure 5(A), for example, the cylinder side of the gas damper 34 is pivotally supported on the upper tip side of the fixed base 22 by a cylinder pivot shaft 36, and the rod side is pivotally supported on the tip side of the spear tube section 2410 of the water discharge nozzle section 24 by a rod pivot shaft 38. Also, as shown in Figure 5(B), the gas damper 34 is provided on both sides of the water discharge nozzle 24.

[0102] A damper operating button 40 is positioned above the water discharge nozzle 24 and connected to the rod side of the gas damper 34 by a wire cable. In the state before the push operation shown in the figure, the damper operating button 40 retracts the rod of the gas damper 34 to its minimum length and locks it. When the damper operating button 40 is pushed in, the lock on the gas damper 34 is released and it extends axially due to the gas pressure, causing the water discharge nozzle 24 to rotate upward around the pivot axis 30 and continuously increase the elevation angle.

[0103] If the damper operating button 40 is released while the gas damper 34 is extending, the extension stops and locks in the stopped position, allowing the water discharge nozzle 24 to be set to any desired elevation angle, as shown in Figure 6.

[0104] To retract, or shorten, the gas damper 34 is released by pressing the damper operation button 40, and the tip of the water discharge nozzle 24 is manually pushed down.

[0105] (c3. Gas damper) Next, we will explain the gas damper. For this explanation, please refer to Figure 7, which shows the gas damper for adjusting the elevation angle as shown in Figure 5. Figure 7(A) shows an exploded view of the gas damper assembly, and Figure 7(B) shows a cross-sectional view of the gas damper.

[0106] As shown in Figure 7(A), the gas damper 34 comprises a cylinder 3410 and a rod 3412. A fixing portion 3417 is provided at the left end of the cylinder 3410, and as shown in Figure 5, it is pivotally supported on the nozzle fixing base 22 by a cylinder pivot shaft 36. A lock control mechanism 340, including a damper operating button 40, is provided at the tip of the rod 3412, which extends to the right from the cylinder 3410.

[0107] A push pin 3411 protrudes from the tip of a rod 3412 that extends outward from the cylinder 3410 of the gas damper 34. When the push pin 3411 is pushed in, the lock of the gas damper 34 is released, and with the cylinder 3410 as the fixed side, the rod 3412, which is the movable side, can be moved to the right.

[0108] The lock control mechanism 340 is a mechanism for pushing in the push pin 3411 of the gas damper 34, and consists of a release head 3414, a release wire 3418, and a push button unit 3416 equipped with a damper operating button 40. The release head 3414 can be attached to the threaded portion 3413 at the tip of the rod 3412, and the release wire 3418 is pulled out from the release head 3414 and connected to the push button unit 3416. The push button unit 3416 is provided with a damper operating button 40 that is pushed out by a spring. The release head 3414 is fixed to the rod 3412 by screwing a nut 3420 into the threaded portion 3413, and as shown in Figure 5, the tip of the rod 3412 can be attached to the pivot axis 38 of the water discharge nozzle 24.

[0109] When the user presses the damper operating button 40, the release wire 3418 between the push button unit 3416 and the release head 3418 moves linearly inside the tube, pushing in the push pin 3411 of the gas damper 34, and the lock of the gas damper 34 is released while the push pin 3411 is pushed in.

[0110] The gas damper 34 with lock control function has the structure shown in Figure 7(B). The gas damper 34 includes a cylinder 3410, in which a piston 3422 functioning as a first piston is slidably mounted, and a separate piston 3426 functioning as a second piston is slidably mounted within the cylinder following the piston 3422. The piston 3422 is integrally mounted with a rod 3412, and the rod 3412 is taken out from one end of the cylinder 3410.

[0111] Inside cylinder 3410, the arrangement of piston 3422 and separate piston 3426 sequentially forms a first cylinder chamber 3428, a second cylinder chamber 3430, and a third cylinder chamber 3432. The first cylinder chamber 3428 and the second cylinder chamber 3430 are filled with oil, while the third cylinder chamber 3432 is filled with an inert gas, such as nitrogen gas, under a predetermined pressure.

[0112] The piston 3422 is provided with an orifice 3434 and a valve 3436. A push pin 3411 is provided inside the rod 3412 so as to be movable in the axial direction, with one end protruding outside the rod 3412 and the other end connected to the valve 3436. When the push pin 3411 is protruding outside, the valve 3436 is closed, and when the push pin 3411 is pushed in, the valve 3436 is opened.

[0113] The valve 3436 opens and closes the flow path of the orifice 3434 that connects the first cylinder chamber 3428 and the second cylinder chamber 3430 provided in the piston 3422. That is, in the push - pin 3411 protruding outward to the outside, the valve 3436 closes the flow path through the orifice 3434 and the piston 3422 is locked.

[0114] Also, when the push - pin 3411 is pushed in, the valve 3436 opens the flow path through the orifice 3434 and the lock of the piston 3422 is released, the rod 3412 on the moving side moves in the pulling - out direction (right direction) with respect to the cylinder 3410 on the fixed side. The moving speed in this case is a speed corresponding to the flow resistance of the oil flowing through the orifice 3434, and the cylinder 3410 moves slowly.

[0115] Here, when comparing the pressure - receiving area S1 at the right end of the cylinder 3410 in the first cylinder chamber 3428 and the pressure - receiving area S2 at the left end of the cylinder 3410 in the third cylinder chamber 3432, due to the rod 3412 penetrating the cylinder 3410, the pressure - receiving area S1 at the right end is smaller than the pressure - receiving area S2 at the left end. Also, the pressures in the first cylinder chamber 3428, the second cylinder chamber 3430, and the third cylinder chamber 3430 are the pressure P of the nitrogen gas filled in the third cylinder chamber 3432.

[0116] Therefore, when the cylinder 3410 is on the fixed side, a right - ward force F1 determined by the pressure - receiving area S1 at the right end and the pressure P is applied to the rod 3412, and a left - ward force F2 determined by the pressure - receiving area S2 at the left end and the pressure P is applied. Since F1 < F2, a right - ward force (force in the pulling - out direction) of (F2 - F1) is applied to the rod 3412.

[0117] In this state, when the valve 3436 is opened by the pushing operation of the push - pin 3411 and the lock of the piston 3422 is released, the rod 3412 on the moving side moves in the right direction, which is the direction of increasing the elevation angle, receiving a force of (F2 - F1) with respect to the cylinder 3410 on the fixed side.

[0118] (c4. Detachable nozzle) Next, a nozzle device with a detachable nozzle section will be described. In this description, refer to Figure 8, which shows a nozzle device with a detachable water-discharge nozzle section, as shown in Figure 5.

[0119] As shown in Figure 8, in the nozzle device 12 of this embodiment, the water discharge nozzle 24, which is provided integrally with the nozzle fixing part 21, has a nozzle part 200 attached to the tip of the spear pipe part 2410, which is similar to the water discharge nozzle that is detachably provided at the tip of a conventional fire extinguishing hose.

[0120] The nozzle section 200 has a water outlet 206 at the tip of the nozzle body 202, and a detachable joint 204 is provided at the rear end of the nozzle body 202. The structure and type of the joint 204 are arbitrary, but for example, a known Machino-type joint may be used. A handle 208 is provided near the center of the nozzle body 202, and normally the handle 208 is used facing downwards, but in this embodiment the nozzle body 202 is connected to the spear pipe section 2410 so that the handle 208 faces upwards.

[0121] Therefore, during firefighting operations, a person will hold the nozzle device 12 in their right hand and grip the handle 208 with their left hand to discharge water. The rest of the structure is the same as in the embodiment shown in Figure 5, so the same reference numerals are used and their explanation is omitted.

[0122] By providing the existing detachable nozzle section 200 to the nozzle device 12 in this way, the structure becomes simpler and costs can be reduced.

[0123] (c5. Erroneous operation prevention mechanism) Next, the malfunction prevention mechanism provided on the damper operating button will be described. In this description, refer to Figure 9, which shows the gas damper operating button equipped with the malfunction prevention member shown in Figure 5. Figure 9(A) shows the front view, and Figure 9(B) shows the top view.

[0124] As shown in Figure 9(A), a stop lever 45 is attached to the damper operating button 40. The stop lever 45 is a metal plate member bent in a stepped shape, and its rear end (left end) is rotatably supported on a pivot shaft 4510 on the water discharge nozzle 24. As shown in Figure 9(B), a notched groove 4512 is formed on the side end on the front side, and the notched groove 4512 fits into the lower shaft portion of the damper operating button 40, thereby preventing the damper operating button 40 from being pressed.

[0125] Therefore, while a person opens the fire hydrant door 116 of the fire hydrant device 10, takes out the nozzle device 12, and carries it to the water discharge location, there is a possibility of accidentally pressing the gas damper operating button 40 depending on how the nozzle device 12 is held. However, since the damper operating button 40 is equipped with a stop lever 45 that functions as an accidental operation prevention member, it will not move even if a pressing force is applied to the damper operating button 40, thus effectively preventing accidental operation of the elevation angle adjustment mechanism.

[0126] When the gas damper 34 is released by pressing the damper operation button 40 to adjust the elevation angle of the water discharge nozzle 24, the subsequent operation can be performed by rotating and pulling off the stop lever 45 from the damper operation button 40.

[0127] (c6. Interlocking operation of the water supply valve and the malfunction prevention mechanism) Next, the interlocking operation of the mechanism to prevent accidental operation of the water supply valve and the damper operating button will be explained. In this explanation, refer to Figure 10, which shows the interlocking operation mechanism between the water supply valve and the gas damper operating button. Figure 10(A) shows the front view of the nozzle device, and Figure 10(B) shows the top view of the nozzle device.

[0128] As shown in Figure 10, the water supply valve 44 is, for example, a ball valve and is attached and fixed to the spear pipe section 2410 of the water discharge nozzle 24 by a U-shaped valve fixing member 4416. The water supply valve 44 is connected to the pipe of the spear pipe section 2410 by an inlet pipe 4412 and introduces fire extinguishing water to be supplied to the water discharge nozzle 24. The water supply valve 44 is also connected to the water inlet 56 of the water tank located inside the fixing base 22 via a flexible hose 43 from an outlet pipe 4414.

[0129] Furthermore, an opening / closing lever 72 is fixed to the valve stem 4410 of the water supply valve 44. For example, the water supply valve 44 is closed in the position shown in the figure, and the water supply valve 44 is opened when a person turns it clockwise, as shown by the dashed line in Figure 10(B).

[0130] A damper operating button 40 is located in front of the water supply valve 44 (on the nozzle side). The opening / closing lever 72 of the water supply valve 44 extends to the tip, forming a stop lever portion 74. When the water supply valve 44 is closed by the opening / closing lever 72 as shown in the figure, a notched groove 4512 formed in the stop lever portion 724 at the tip of the opening / closing lever 72 fits into the lower shaft portion of the damper operating button 40, preventing the damper operating button 40 from being pushed in.

[0131] After a person has placed the nozzle device 12 at the water discharge location while spraying water, the operator rotates the opening / closing lever 72 of the water supply valve 44 to the clockwise position shown by the dashed line in Figure 10(B). This opens the water supply valve 44, supplying firefighting water to the water tank inside the fixed base 22. The fixed base 22 is then fixed in place by the weight of the water tank, resisting the reaction force of the water discharge. When the opening / closing lever 72 is operated to the open position of the water supply valve 44, the stop lever portion 74 at the tip is pulled away from the damper operation button 40. Pressing the damper operation button 40 releases the lock on the gas damper 34, allowing the elevation angle of the water discharge nozzle 24 to be adjusted.

[0132] In this way, the water supply to the water tank by opening the water supply valve 44 and the release of the stop lever portion 74 for preventing accidental operation of the damper operating button 40 can be performed with a single operation of the opening / closing lever 72, thereby improving operability.

[0133] [d. Second embodiment of the nozzle device] Next, a second embodiment of the nozzle device will be described. In this description, refer to Figure 11 showing the second embodiment of the nozzle device, Figure 12 showing the stopper member removed from the nozzle device of Figure 11, and Figure 13 showing the water discharge state with the elevation angle of the nozzle device of Figure 11 adjusted. Figure 11(A) shows the front view of the nozzle device, and Figure 11(B) shows the top view of the nozzle device. Also, Figure 12(A) shows the front view of the stopper member, and Figure 12(B) shows the top view of the stopper member.

[0134] As shown in Figure 11, the nozzle device 12 of this embodiment has a manual elevation angle adjustment mechanism for the water discharge nozzle 24.

[0135] Similar to the first embodiment in Figure 5, the spear-shaped tube section 2410 at the rear end of the water discharge nozzle 24 is pivotally supported by a pivot shaft 30 on a bearing member 32 located on a fixed base 22, allowing it to rotate freely in the vertical direction. However, it differs in that, instead of a gas damper 34, a manually operated elevation angle adjustment mechanism is provided at the tip of the water discharge nozzle 24, which includes a stopper member 46 with multiple stopper grooves 4610~4614 formed on an inclined surface, and a support arm 48.

[0136] As shown in Figure 11(B), the stopper member 46 is fixed on the fixing base 22 so as to be located on both sides of the water discharge nozzle 24, and as shown in Figure 12, stopper grooves 4610 to 4614 are formed on the upper end surface that extends from front to rear. Here, the number of stopper grooves 4610 to 4614 determines the number of elevation angle adjustment steps, and the number is arbitrary, but for example, if five stopper grooves are provided, it becomes possible to adjust the elevation angle in five steps.

[0137] A support arm 48 is provided on the water discharge nozzle 24 side, corresponding to the stopper member 46. The support arm 48 has one end on the nozzle side that is pivotally supported by a pivot shaft 50 on both sides of the tip side of the spear pipe section 2410, and stop bars 52 are fixed to the other ends of the support arm 48 on the fixing base 22 side.

[0138] In its initial state, the stop bar 52 of the support arm 48 is fitted into the stopper groove 4610 of the stopper member 46, and the elevation angle corresponding to the direction of the water discharge axis 2414 is set to the minimum elevation angle.

[0139] As shown in Figure 12(A), the stopper grooves 4611 to 4614 of the stopper member 46 are sock-shaped grooves that open upwards in a U shape and are cut out horizontally in a U shape towards the rear (left side).

[0140] In the initial state, the stop bar 52 attached to the tip of the support arm 48 shown in Figure 11 is fitted into the stopper groove 4610, which is set to the minimum elevation angle, and is positioned on the rear end (left side) to prevent it from coming loose.

[0141] Furthermore, when water is discharged from the nozzle device 12, a reaction force associated with the discharge is applied to the water discharge nozzle 24, and the water discharge nozzle 24 receives an upward rotational force around the pivot axis 30. However, since the stop bar 52 is fitted into the stopper groove 4610 in a state where it is not allowed to come out, the water discharge nozzle 24 is prevented from rotating upward even when subjected to the reaction force of the discharged water.

[0142] Furthermore, a nozzle fixing structure is provided to secure the water discharge nozzle 24 to the nozzle fixing part 21 when a person carries the nozzle device 12. The nozzle fixing structure is arbitrary, but for example, near the center of the water discharge nozzle 24, one end of the left and right nozzle fixing bands 57, which are bent in an inverted U shape and divided in the middle, is fixed to the fixing base 22 with a hinge so that they can rotate freely. On the other hand, a snap lock (catch clip) 55 is provided on the divided part in the middle of the other end of the nozzle fixing band 57, and when the snap lock 55 is closed, the water discharge nozzle 24 is fixed to the fixing base 22, and when the snap lock 55 is opened, the fixing of the water discharge nozzle 24 is released and the elevation angle can be adjusted. The rest of the structure is the same as in the first embodiment in Figure 5, so the same reference numerals are used and the explanation is omitted.

[0143] When a person carries the nozzle device 12 to the water discharge location and installs it, as shown in Figure 13, the latch 55 is opened to release the water discharge nozzle 24 from being fixed by the nozzle fixing band 57, and the stop bar 52 of the support arm 48 is fitted, for example, into the stopper groove 4614 at the left end, thereby setting the water discharge nozzle 24 to its maximum elevation angle.

[0144] Thus, the elevation angle adjustment mechanism of this embodiment has a simple structure consisting of a support arm 48 and a stopper member 46 having a plurality of stopper grooves 4610 to 4614 formed therein. As a result, the nozzle device 12 is lightweight and can be easily carried by a person.

[0145] [e. First embodiment of the nozzle fixing part] Next, a first embodiment of the nozzle fixing part will be described. In this description, refer to Figure 14, which shows the first embodiment of the nozzle fixing part. Figure 14(A) shows the state before water discharge, and Figure 14(B) shows the state during water discharge.

[0146] As shown in Figure 14(A), the nozzle fixing part 21 of this embodiment is characterized in that the inside of the fixing base 22 is a water tank chamber 54. Since the fixing base 22 has a flat box shape, the water tank chamber 54 is formed by making the inside a sealed structure.

[0147] A water inlet 56 is provided at the top of the water tank chamber 54, and a flexible hose 43 from a water supply valve 44 located on the water discharge nozzle 24 side is connected to it. An air vent 58 is provided at the rear end (left end) of the water tank chamber 54, and a drain valve 60 is provided below it. The rest of the structure is the same as in the embodiment shown in Figure 5, so the same reference numerals are used and their explanation is omitted.

[0148] When a person carries the nozzle device 12 to the water discharge location and fixes it in place, as shown in Figure 14(B), the water supply valve 44 provided on the water discharge nozzle 24 side is opened during water discharge to supply fire extinguishing water to the water tank chamber 54 inside the fixing base 22 and fill it with water. Since the water tank chamber 54 is open to the outside air by the air vent 58, it is possible to fill it with water without compressing the air inside the tank. The completion of filling the water tank chamber 54 can be confirmed by the discharge of fire extinguishing water from the air vent 58, and at that point the water supply valve 44 should be closed. It is desirable to provide an automatic drain valve in the air vent 58. The automatic drain valve is closed below a predetermined pressure and opens when the predetermined pressure is exceeded. Therefore, when the water supply valve 44 is opened to supply firefighting water, if the air pressure in the water tank chamber 54 rises and exceeds a predetermined pressure, the automatic drain valve opens to discharge air while the water tank chamber 54 is filled with firefighting water. Once the discharge of firefighting water from the air vent 58 is confirmed, the water supply valve 44 is closed, and when the pressure in the water tank chamber 54 drops below the predetermined pressure, the automatic drain valve closes, preventing the discharge of the filled firefighting water from the air vent 58. To drain the water tank chamber 54 after the firefighting activity is completed, the drain valve 60 is opened while the water supply valve 44 is open.

[0149] In this way, when the water tank chamber 54 of the fixed base 22 is filled with fire extinguishing water, the weight of the fixed base 22 increases, and even when subjected to the reaction force from the water discharge nozzle 24, the weight of the fixed base 22 maintains its stability, making it possible to maintain unmanned water discharge, which continuously discharges fire extinguishing water in the direction of the elevation angle of the water discharge nozzle 24 that is set at that time.

[0150] [f. Modified version of the first embodiment of the nozzle fixing part] Next, a modified example of the first embodiment of the nozzle fixing part will be described. In this description, refer to Figure 15, which shows a modified example of the first embodiment of the nozzle fixing part. Figure 15(A) shows a cross-section of the nozzle fixing part along the cutting line bb in Figure 15(B), Figure 15(B) shows a cross-section viewed from the plane along the cutting line aa in Figure 15(A), and Figure 15(C) shows a cross-section along the cutting line cc in Figure 15(B).

[0151] As shown in Figure 15, the nozzle fixing part 21 of this embodiment is characterized by reducing the weight of the fixing base 22 and the water tank.

[0152] The fixing base 22 consists of a single aluminum plate for the upper plate 2210, front plate 2211, and rear plate 2212, but both sides are open. Furthermore, the bottom surface has a lattice plate structure consisting of a gourd-shaped lower plate 2214 and a straight lower plate 2216, which helps to lighten the fixing box 22.

[0153] Furthermore, the water tank chamber provided within the fixed base 22 is a flexible bag, such as a flat rubber bag 76, with the upper side of the rubber bag 76 connected to the water inlet 56. The rubber bag 76, which expands upon receiving firefighting water from the water inlet 56, becomes almost rigid due to the water pressure. Note that the water tank chamber is not limited to a rubber bag 76; for example, it may be a folded pressure-resistant plastic bag.

[0154] This lightweight structure of the fixing base 22 and the use of a rubber bag 76 in the water tank chamber reduce the weight of the nozzle fixing part 21, making it possible for a person to easily carry the nozzle device 12, which consists of the water discharge nozzle 24 and the nozzle fixing part 21. Note that the weight reduction of the nozzle fixing part 21 is not limited to the modified example shown in Figure 13, and includes other appropriate weight reduction structures, such as making the upper plate 2210 a lattice structure.

[0155] [g. Second embodiment of the nozzle fixing part] Next, a second embodiment of the nozzle fixing part will be described. In this description, refer to Figure 16, which shows the second embodiment of the nozzle fixing part. Figure 16(A) shows the state before water discharge, and Figure 16(B) shows the state during water discharge.

[0156] As shown in Figure 16, the nozzle fixing part 21 of this embodiment is characterized by being fixed in place by a piston-cylinder mechanism.

[0157] As shown in Figure 16(A), a cylinder 62 is formed facing downward at each of the four corners of the fixing base 22 of the nozzle fixing part 21, and a piston 64 is slidably mounted inside the cylinder 62. A non-slip surface 25 is fixed to the tip of a rod 66 that extends below the piston 64. A water inlet 56 is provided to the cylinder 62 via a water supply channel 65, and a flexible hose 43 from a water supply valve 44 provided on the water discharge nozzle 24 side is connected to it.

[0158] When a person carries the nozzle device 12 to the water discharge location and sets it up to discharge water, as shown in Figure 16(B), opening the water supply valve 44 provided on the water discharge nozzle 24 side during water discharge supplies fire extinguishing water to the cylinder 62, which pushes down the piston 64 and fixes the anti-slip device 25 against the road surface or the like.

[0159] Furthermore, as the piston 64 is pushed down, the fixing base 22 rises, and the water discharge nozzle 24 is lifted to a higher position. Also, as the fixing base 22 rises, the water-filled fire extinguishing hose 14 connected to the water discharge nozzle 24 is also lifted, so the weight of the fire extinguishing hose 14 is added to the fixing base 22, further increasing the force pressing the anti-slip surface 25 against the road surface. This ensures that the fixing position is secure even when subjected to the reaction force from the water discharge of the water discharge nozzle 24, enabling stable unmanned water discharge.

[0160] Although Figure 16 shows a nozzle device 24 equipped with an elevation angle adjustment mechanism using the gas damper 34 shown in Figure 5, the nozzle device 24 equipped with a manually operated elevation angle adjustment mechanism shown in Figure 11 may also be a nozzle fixing part 21 using the piston-cylinder mechanism shown in Figure 16.

[0161] [h. Third embodiment of the nozzle fixing part] Next, a third embodiment of the nozzle fixing part will be described. In this description, refer to Figure 17, which shows the third embodiment of the nozzle fixing part, and Figure 18, which shows the nozzle fixing part separated during water discharge. Figure 17(A) shows a cross-section of the nozzle fixing part along the cutting line ee of Figure 17(B), Figure 17(B) shows a cross-section viewed from the plane along the cutting line dd of Figure 17(A), and Figure 17(C) shows a cross-section along the cutting line ff of Figure 17(B). Also, Figure 18(A) shows a cross-section viewed from the same plane as Figure 17(B), and Figure 18(B) shows the same cross-section as Figure 17(C).

[0162] As shown in Figure 17, the nozzle fixing part 21 of this embodiment is characterized by having a stationary fixing structure that unfolds when the flat hose 70 is filled with water.

[0163] In this embodiment, the fixing base 22 of the nozzle fixing part 21 is box-shaped with open sides in the front-to-back direction (parallel to the water discharge direction), and a water supply pipe 68 is positioned in the center of the fixing base 22 in the direction of water discharge (left-to-right direction in the figure). Both ends of the water supply pipe 68 are closed, and a flexible hose 43 from a water supply valve 44 provided on the water discharge nozzle side is connected to the water inlet 56 at the top center.

[0164] Flat hoses 70 are connected to, for example, five locations on both sides of the water supply pipe 68 located inside the fixed base 22, with the ends of the hoses closed. As shown in Figure 17(C), in the initial state, the flat hoses 70 are stored inside the fixed base 22 in a wound state. The length of the flat hoses 70 is any length that can extend to the outside from the opening side of the fixed base 22, and is a length that can be stored inside the fixed base 22 in a wound state. The other structures are the same as in Figure 5, so the same reference numerals are used and their explanation is omitted.

[0165] When a person carries the nozzle device 12 to the water discharge location and sets it up, the water supply valve 44 provided on the water discharge nozzle 24 side is opened during water discharge to supply fire extinguishing water to the water supply pipe 68 in the fixed base 22. As shown in Figure 17(C), the winding flat hose 70 is filled with fire extinguishing water, and as shown in Figure 18(A), the winding flat hose 70, upon being filled with water, extends outwards from the opening side like crab legs.

[0166] Therefore, as shown in Figure 18(B), the ten flat hoses 70 deployed externally are pressed against the road surface as legs, making it possible to fix and hold the nozzle device in place against the reaction force from the water discharge nozzles 24, thus enabling stable unmanned water discharge.

[0167] Although Figure 17 shows a nozzle device 24 equipped with an elevation angle adjustment mechanism using the gas damper shown in Figure 5, the nozzle device 24 equipped with a manually operated elevation angle adjustment mechanism shown in Figure 11 may also use the nozzle fixing part 21 using the flat hose 70 shown in Figure 17.

[0168] [i. Variations of the present invention] Modifications of the fire hydrant device according to the present invention will now be described. In addition to the embodiments described above, the fire hydrant device of the present invention includes the following modifications.

[0169] (Separation structure of the water discharge nozzle and nozzle fixing part) The above embodiment uses a nozzle device in which the water discharge nozzle and the nozzle fixing part are integrated as an example. However, the water discharge nozzle and the nozzle fixing part may be detachable. When a person opens the fire hydrant door and takes out the nozzle device, they can choose to either remove the water discharge nozzle and the nozzle fixing part as an integrated unit and set it in place at the water discharge location for unattended water discharge, or separate the water discharge nozzle from the nozzle fixing part, remove it, and have a person pull it out at the water discharge location for manned water discharge.

[0170] (elevation angle adjustment mechanism) Furthermore, although the above embodiment uses a gas damper to adjust the elevation angle of the water discharge nozzle, it is not limited to this, and an elevation angle adjustment mechanism using a hydraulic actuator that operates with the water pressure of the fire extinguishing water may also be used.

[0171] (Horizontal rotation mechanism) Furthermore, although the above embodiment is provided with an elevation angle adjustment mechanism for the water discharge nozzle, it may also be provided with a swivel adjustment mechanism that rotates the water discharge nozzle horizontally relative to the nozzle fixing part, so that the water discharge direction of the water discharge nozzle can be adjusted horizontally while the nozzle is fixed in place at the water discharge location.

[0172] (others) Furthermore, the present invention includes appropriate modifications that do not impair its purpose and advantages, and is not limited by the numerical values ​​shown in the above embodiments. [Explanation of Symbols]

[0173] 10: Fire hydrant system 12: Nozzle device 14: Fire hose 16: Road 18: Guard passage 20: EVs 21: Nozzle fixing part 22:Fixed stand 2210: Upper plate 2212: Rear plate 2213: Front plate 2214: Lower end plate 2216: Lower center plate 24,200: Water spray nozzle 2410: Spear tube part 2412: Nozzle part 25: Anti-slip 26,208: Handle 28: Hose connection 30: Rotary shaft 32: Bearing component 34: Gas damper 340: Lock control mechanism 36: Cylinder pivot axis 38: Rod pivot axis 40: Damper operation button 42: Pull-out pipe 43: Flexible hose 44: Water supply valve 4410: Valve stem 4412: Inflow piping 4414: Outlet piping 4416: Valve fixing member 45: Stop lever (device to prevent accidental operation) 4510: Rotating shaft 4512: Notched groove 46: Stopper component 4610~4614: Stopper groove 48: Support arm 50: Pivot axis 52: Stop bar 55: Snap-on type 54: Water Tank Room 56: Water inlet 57: Nozzle fixing band 58: Bleeding the air 60: Drain valve 62: Cylinder 64: Piston 65: Communication path 66: Rod 68: Water supply pipe 70: Flat hose 72: Opening / closing lever 74: Stop lever section 76: Rubber bag 110a, 110b: Enclosure 111a, 111b: Decorative frame 116: Fire hydrant door 118: Maintenance Door 120: Fire hydrant storage area 122: Fire extinguisher door 123: Fire extinguisher storage compartment 127: Peephole 124: Electric Door 126: Red indicator light 128: Transmitter 130: Response lamp 132: Phone hijacking 134,136:Terminal box 140: Fire extinguisher 142: Pump start switch 143: Pump start-linked switch 148: Water supply piping 150: Water tap

Claims

1. A fire hydrant system in which a fire extinguishing hose with a water nozzle attached to its tip is stored in a hose storage compartment inside the housing, and a person pulls out the fire extinguishing hose and uses the water nozzle to extinguish a fire, A fire hydrant device characterized by comprising a nozzle fixing unit that integrates the water discharge nozzle with a nozzle fixing unit that is installed and fixed at the water discharge location for discharging water.

2. A fire hydrant device according to claim 1, The fire hydrant device is characterized in that the nozzle device is removably housed on the back side of a fire hydrant door, which is provided on the front of the housing of the fire hydrant device and can be opened and closed on its lower side.

3. A fire hydrant device according to claim 1, The nozzle fixing part is, A box-shaped base on which the aforementioned water discharge nozzle is placed, An elevation angle adjustment mechanism for adjusting the elevation angle of the water discharge nozzle on the aforementioned fixed base, A fire hydrant device characterized by being equipped with the following features.

4. A fire hydrant device according to claim 3, The aforementioned mounting base is characterized by having a predetermined box shape that is easy for a person to carry.

5. A fire hydrant device according to claim 4, The aforementioned mounting base is characterized by being a flat, gourd-shaped box.

6. A fire hydrant device according to claim 3, The aforementioned elevation angle adjustment mechanism is A pivot support portion that pivotally supports the rear end of the water discharge nozzle on the fixed base so that it can rotate vertically, A gas damper supports the tip of the water discharge nozzle and the fixing base at both ends in the axial direction, and rotates the water discharge nozzle vertically using the pivot support as a fulcrum due to the extension and contraction in the axial direction, An operating unit for operating the extension and retraction of the gas damper, A fire hydrant device characterized by being equipped with the following features.

7. A fire hydrant device according to claim 6, The aforementioned gas damper is It is locked to the shortest length in its initial state. When the lock is released by operating the aforementioned operating part, it extends in the axial direction. If the operation of the operating part is released during the extension, it will stop and lock in the extended position at the time of release. When the lock is released by operating the control unit, the water discharge nozzle is pushed down and retracts in the axial direction. A fire hydrant device characterized in that, when the operation of the operating part is released during the aforementioned retraction, it stops and locks in the retracted position at the time of release.

8. A fire hydrant device according to claim 6, The operating section of the gas damper is This is an operating button that releases the lock of the gas damper by being moved by pushing in a wire cable inserted through a flexible tube. A fire hydrant device characterized by having a detachable malfunction prevention member that prevents accidental pressing of the aforementioned operating button.

9. A fire hydrant device according to claim 3, The aforementioned elevation angle adjustment mechanism is A pivot support portion that pivotally supports the rear end of the water discharge nozzle on the fixed base so that it can rotate vertically, A support arm is provided, with one end pivotally supported on the tip side of the water discharge nozzle and the other end fitted into one of a plurality of receiving grooves arranged on the fixing base, thereby changing the elevation angle of the water discharge nozzle in multiple stages corresponding to the receiving grooves. A fire hydrant device characterized by being equipped with the following features.

10. A fire hydrant device according to claim 3, The nozzle fixing part has the inside of the box-shaped fixing base functioning as a water tank. The fire hydrant device is characterized in that, when the water discharge nozzle is fixed in place at the water discharge location, it is equipped with a water supply valve that, when opened, supplies water from the water discharge nozzle side to the water tank while water is being discharged, thereby filling the tank.

11. A fire hydrant device according to claim 10, The aforementioned box-shaped fixed base has a lightweight structure comprising a closed surface that forms the top surface and the front and rear sides in the direction of water discharge, an open surface that forms the left and right sides, and a bottom surface that forms a grid-like surface in which multiple frame plate members are arranged at intervals. A fire hydrant device characterized in that a flexible water bag, which functions as a water tank, is housed inside a fixed base equipped with the lightweight structure, when filled with water supplied by opening the water supply valve.

12. A fire hydrant device according to claim 6, The operating section of the gas damper is This is an operating button that releases the lock of the gas damper by pushing and retrieving a wire cable inserted through a flexible tube. A malfunction prevention member is detachably provided to prevent the push operation caused by erroneous operation of the operation button. The nozzle fixing part has the inside of the box-shaped fixing base functioning as a water tank. The aforementioned water discharge nozzle, when installed and fixed at the water discharge location, is equipped with a water supply valve that, when opened, supplies water from the water discharge nozzle side to the water tank to fill it. The nozzle device is The opening and closing operation part of the water supply valve and the malfunction prevention member for the operation part of the gas damper are integrated into one unit. A fire hydrant device characterized in that the operation of the operating button becomes possible by detaching the malfunction prevention member from the operating part of the gas damper in conjunction with the opening operation of the water supply valve.

13. A fire hydrant device according to claim 3, The nozzle fixing part comprises a piston-cylinder mechanism provided at multiple locations on the fixing base. The fire hydrant device is characterized in that, when the water discharge nozzle is fixed in place at the water discharge location, water is supplied from the water discharge nozzle side to the cylinder chamber of the piston-cylinder mechanism by opening the water supply valve, thereby pressing the legs, which are arranged on the piston via a rod, against the road surface at the water discharge location.

14. A fire hydrant device according to claim 3, The nozzle fixing section is equipped with multiple flat hoses with closed ends that are wound up and connected and fixed to multiple locations on both sides of the water supply pipe, which is positioned in the direction of water discharge on the fixing base. The fire hydrant device is characterized in that, when the water discharge nozzle is fixed in place at the water discharge location, it is equipped with a water supply operation unit that supplies water from the water discharge nozzle side to the water supply pipe while water is being discharged, fills the plurality of flat hoses which are connected and fixed in a wound state on both sides of the water supply pipe with water, and extends outward from both sides of the fixed base as support legs.

15. A fire hydrant device according to claim 1, The aforementioned water discharge nozzle is The nozzle tube section has a horizontal rear end portion that is positioned parallel to the upper surface of the nozzle fixing base, followed by an upward-facing tip portion that is bent upward at a predetermined minimum elevation angle, The rear end is connected to the tip of the spear-shaped section, and the nozzle section has a water outlet opening at its tip, A fire hydrant device characterized by being equipped with the following features.

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