Fire hydrant device

Abstract

To make it possible to easily perform work on equipment inside a fire hydrant device installed above the road surface of a monitoring passage, while ensuring the safety of the work.SOLUTION: A fire hydrant device 10 is installed at a predetermined height above the road surface of a monitoring passage 34 provided along the wall surface of a tunnel, in proximity to or in contact with the tunnel wall surface. On the front face of a housing of the fire hydrant device 10, a fire hydrant door 14 is provided which opens downward with its lower end serving as a shaft, and a step structure is arranged on the rear surface of the door. During inspection or repair, with the fire hydrant door 14 opened downward, a step board 100 arranged in a folded state on the rear surface of the door is unfolded forward and held in a horizontal state by a two-link 106, allowing a worker to stand on the step board 100 and perform inspection or repair work on equipment arranged and housed at a high position inside the housing.SELECTED DRAWING: Figure 10

Description

[Technical Field]

[0001] The present invention relates to a fire hydrant device that is installed exposed in a watchman's passageway provided along the wall of a tunnel. [Background technology]

[0002] Conventionally, fire hydrants have been installed as emergency equipment in tunnels such as those on expressways and motorways. These hydrants are generally installed along the length of the tunnel, at intervals of, for example, 50 meters, embedded in cutouts in the tunnel walls where guard passages are provided.

[0003] In a fire hydrant device, for example, a fire hose with a water discharge nozzle attached to the end, valves including a fire hydrant valve, etc. are stored in a fire hydrant storage section inside a housing equipped with a forward-tilting fire hydrant door (forward-tilting door), and a maintenance door that opens upward for maintenance and repair is provided above the fire hydrant door. Also, two fire extinguishers are stored in a fire extinguisher storage section inside a housing equipped with a fire extinguisher door (Patent Document 1).

[0004] However, in tunnels constructed using methods such as shield tunneling, the structure of the tunnel body makes it difficult to cut out the tunnel wall due to the cost and effort involved. Therefore, rather than embedding the fire hydrant device in the cut-out section, it is necessary to install the fire hydrant device in an exposed position in the guard's passage.

[0005] For this reason, a wall-mounted structure has been proposed in which a stand is installed on the tunnel wall and the fire hydrant device is attached and fixed to the installed stand, as a structure that allows the fire hydrant device to be installed in an exposed state in the guard passage without having to be boxed out of the tunnel wall.The stand for this wall-mounted structure is composed of a main support part that is fixed to the wall surface and an attitude-maintaining member that maintains the attitude of the fire hydrant device (Patent Document 2).

[0006] However, installing a fire hydrant device using a wall-mounted structure has issues such as the time and effort required to attach the device to the tunnel wall, so it is being considered to adopt a so-called stationary structure, in which a stand is installed on the road surface of the guard passage, which is easier to install, and the fire hydrant device is attached and fixed to the installed stand. [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-279294 [Patent Document 2] Japanese Patent Application Publication No. 2019-000196 Summary of the Invention [Problem to be solved by the invention]

[0008] However, in the case of wall-mounted or freestanding fire hydrant devices that are installed at a specified height above the road surface of the guard passage, when inspecting or repairing equipment such as hydrant valves or automatic pressure regulating valves stored and arranged inside the housing, or when performing water discharge tests by attaching test equipment to the inspection joint, the equipment in question may be stored and arranged at a relatively high position, for example, above the worker's chest, and the high reach makes the work more time-consuming and tedious.

[0009] Furthermore, in the case of wall-mounted or freestanding fire hydrant devices, if the shoulder of the guard's passage where the hydrant device is installed is left open without a fence (handrail) so that road users standing on the road surface can operate the hydrant device on the guard's passage side, there is a risk that workers may accidentally fall from the guard's passage onto the road when inspecting or repairing the hydrant. In particular, if the equipment to be serviced inside the housing is stored or placed at a high position, the risk of falling increases, and if a large vehicle passes by, it is expected that the equipment may be pushed out onto the road by wind pressure, so work must be carried out with the utmost care.

[0010] The present invention aims to provide a fire hydrant device that allows work on equipment inside the fire hydrant device installed above the road surface of a guard passage to be easily performed while ensuring safety. [Means for solving the problem]

[0011] (Fire hydrant equipment) The present invention relates to a fire hydrant device that is installed at a predetermined height above the road surface of a guard passageway that is provided along the wall of a tunnel having a road, in proximity to or in contact with the tunnel wall, and that has a fire hydrant door that opens downward around an axis at the bottom end and a maintenance door that opens upward around an axis at the top end on the front of the housing, The fire hydrant door is characterized by having a step structure that can be used in the downward open position.

[0012] (Step structure) The step structure is When the fire hydrant door is opened downward, a footboard is pivotally supported on the lower end of the back surface of the fire hydrant door located at the front so as to be freely rotatable in the front-rear direction; a step holding mechanism that holds the step that has rotated forward in a horizontal position when the fire hydrant door is opened downward; Equipped with.

[0013] (Treadboard holding mechanism) The tread retention mechanism is One end of the two-section link arm is pivotally supported on each of the left and right sides in front of the tread, and the other end is pivotally supported at a predetermined position on the back of the fire hydrant door. The length of each link arm of the two-section link is set so that when the footplate is closed and abutting the back surface of the fire hydrant door, the link arms of the two-section link are bent to a position where they overlap, and when the footplate is opened horizontally, the link arms of the two-section link are extended to a position where they are lined up in a straight line.

[0014] (Step support leg structure) The step structure is When the fire hydrant door is opened downward, a footboard is pivotally supported on the lower end side of the back surface of the fire hydrant door located at the front so as to be freely rotatable in the front-rear direction; a support leg mechanism that extends below the footboard and supports the footboard on the road surface of the guard passage when the fire hydrant door is rotated downward and opened horizontally; Equipped with.

[0015] (Support leg mechanism) The support leg mechanism is A pair of support legs pivotally supported on the left and right ends of the front rear surface of the tread so as to be rotatable in the left and right directions; a pair of link arms, one end of which is pivotally supported at the center of the support leg and the other end of which is pivotally supported slidably in a guide slot formed along the front end side of the tread; Equipped with The lengths of the link arm and the long guide hole are set so that when the support leg is closed so that it abuts against the underside of the tread, the other end of the link arm is located on the center side of the long guide hole, and when the support leg is open and approximately perpendicular to the road surface of the guard passage, the other end of the link arm is located at the outer end of the long guide hole.

[0016] (Leg length adjustment part of the support leg) The support legs are provided with leg length adjustment parts at their tips that come into contact with the road surface of the guard passage, for adjusting the length of the support legs.

[0017] (Position setting member indicating the position where the safety belt hook is attached to the frame) A frame for storing a fire hose is placed inside the housing, A hook position setting member is disposed at a predetermined position on the frame, and sets the position for fastening the hooks on both ends of the safety belt used by the worker when the fire hydrant door is open. [Effects of the Invention]

[0018] (Effect of fire hydrant equipment) The present invention relates to a fire hydrant device that is installed close to or in contact with the tunnel wall at a predetermined height above the road surface of a monitor's passageway that is provided along the wall of a tunnel containing a road, and that has a hydrant door that opens downward on an axis at the bottom and a maintenance door that opens upward on an axis at the top, on the front of the casing. The hydrant door has a step structure that can be used in the opened downward position, so that when inspecting or repairing equipment such as valves stored or placed in the hydrant device, the maintenance door and the hydrant door are opened together, and since the step structure is provided on the hydrant door, the step structure is deployed and becomes usable. The worker can work by standing on the deployed step structure, and by working on equipment that is stored or placed in a casing that is high above the monitor's passageway, the worker's hands can be brought as close as possible to the equipment in question, making it easy to perform inspection and repair work, reducing the workload and improving work efficiency. Furthermore, a stable working posture can be adopted, ensuring high safety even when working on a monitor's passageway that faces the road inside a tunnel where vehicles are passing.

[0019] (Effect of step structure) In addition, the step structure is equipped with a step that is pivotally supported in the front and rear directions at the lower end of the back side of the hydrant door located at the front when the hydrant door is opened facing downward, and a step holding mechanism that holds the step that has been pivoted forward in a horizontal position when the hydrant door is opened facing downward.Therefore, when the hydrant door is closed, the step and step holding mechanism are folded on the back side of the door and are stored compactly in a small space, and when inspecting or repairing the equipment inside the housing, the hydrant door is opened downward on its axis at the bottom end, exposing the step structure including the step and step holding mechanism stored on the back side of the door to the front, and the step can be pivoted forward to make it horizontal, and even when a worker stands on the step, the step holding mechanism reliably holds the step in a horizontal position, allowing for stable work.

[0020] (Effect of the treadle retention mechanism) In addition, the step holding mechanism has a pair of two-section links, one end of which is journalled on each of the left and right sides of the front of the step, and the other end of which is journalled at a predetermined position on the back of the hydrant door.The length of each link arm of the two-section link is set so that when the step is closed and abutting the back of the hydrant door, the link arms of the two-section link are bent to a position where they are overlapping, and when the step is opened horizontally, the link arms of the two-section link are extended to a position where they are lined up in a straight line.This simple and compact structure using the two-section link makes it possible to reliably hold the step extended forward in a horizontal position.

[0021] (Effect of the footboard support leg structure) The step structure includes a step that is pivotally supported in the front and rear directions at the lower end of the back surface of the hydrant door when the hydrant door is opened downward, and a support leg mechanism that extends below the step and supports the step on the surface of the guard passage when the hydrant door is opened downward and horizontally. Therefore, when the step rotates forward from the back surface of the hydrant door and opened horizontally by the step holding mechanism, it is supported on the surface of the guard passage by the support leg mechanism attached below the step, and most of the load applied to the step when a worker stands on it is supported by the support leg mechanism that stands above the surface of the guard passage. As a result, the load applied to the shaft structure that pivotally supports the lower end of the hydrant door and the step holding mechanism is significantly reduced, and the step structure can be easily installed on the back surface of the door without having to increase the strength of the hydrant door even when the step structure is installed.

[0022] (Effect of support leg mechanism) The support leg mechanism comprises a pair of support legs journalled at each of the left and right ends of the front underside of the tread so as to be rotatable in the left-right direction, and a pair of link arms journalled at one end in the centre of the support leg and at the other end so as to be slidable in a guide hole formed along the front end of the tread. The lengths of the link arms and the guide holes are set so that when the support legs are closed so as to abut against the underside of the tread, the other end of the link arm is located at the centre of the guide hole, and when the support legs are opened substantially vertically, the other end of the link arm is located at the outer end of the guide hole. Therefore, when the support leg mechanism, which includes the support legs, link arms and guide holes, is folded up and stored compactly in a small space on the underside of the tread that is deployed horizontally, and when the tread is opened horizontally, the pair of support legs are opened left and right and held by the link arms, so that the support legs stand above the supervisor's walkway, and the tread can be reliably kept horizontal even when subjected to the load of a worker standing on the tread, ensuring a stable working posture.

[0023] (Effect of the leg length adjustment part of the support leg) In addition, the support legs are equipped with leg length adjustment parts at the tips that come into contact with the road surface of the guard passage, which adjust the length of the support legs.Therefore, when installing the hydrant device, the length can be adjusted in advance using the leg length adjustment parts so that the bottom ends of the support legs will reliably come into contact with the road surface of the guard passage when the hydrant door is opened and the treads of the step structure and support legs are deployed in the usable state.This means that when inspecting or repairing the hydrant device while it is in operation, when the hydrant door is opened, the treads are deployed and the support legs are raised, the bottom ends of the support legs will reliably come into contact with the road surface of the guard passage, and the treads can be kept reliably horizontal without any rattle.

[0024] (Effect of the hook position setting member that sets the position where the safety belt is fastened to the frame) In addition, a frame for storing the fire hose is arranged inside the housing, and a hook position setting member is arranged in a predetermined position on the frame to set the position for attaching the hooks on both ends of the safety belt used by workers when the hydrant door is open.Therefore, when a worker opens the hydrant door and uses the unfolded step structure to perform inspection or repair, he or she hooks the safety belt onto the hydrant device to prevent it from falling off.However, in this case, if the position for attaching the safety belt hook is inappropriate, the hook may come off during work.Therefore, by hooking the hook onto the setting member that sets the position for attaching the hook provided on the frame when the hydrant door is open, the safety belt can be securely fixed to the hydrant device by the hook, making it possible to work safely. [Brief explanation of the drawings]

[0025] [Figure 1] FIG. 1 is an explanatory diagram showing a first embodiment of a fire hydrant device installed on the road surface of a guard passage. [Figure 2] FIG. 2 is an explanatory diagram showing the fire hydrant device of FIG. 1 from the front. [Figure 3] FIG. 2 is an explanatory diagram showing the fire hydrant device of FIG. 1 from the left side. [Figure 4] 2 is an explanatory diagram showing the internal structure of the fire hydrant storage section of the fire hydrant device of FIG. 1 from the front with the front of the housing open. FIG. [Figure 5] FIG. 2 is an explanatory diagram showing the maintenance door and the hydrant door of the fire hydrant device in an open state. [Figure 6] FIG. 6 is an explanatory diagram showing the fire hydrant device of FIG. 5 from the left side. [Figure 7] FIG. 6 is an explanatory diagram showing the fire hydrant device of FIG. 5 from the front. [Figure 8] 6 is an explanatory diagram showing the fire hydrant door of FIG. 5 taken out from the back and side. [Figure 9] 9 is an explanatory diagram showing the fire hydrant door of FIG. 8 from the back and side with the step structure unfolded. [Figure 10] This is an explanatory diagram showing the inspection and repair work of a fire hydrant device. [Figure 11] FIG. 11 is an explanatory diagram showing the fire hydrant device of FIG. 10 from the front. [Figure 12] FIG. 11 is an explanatory diagram showing the fire hydrant device of FIG. 10 together with an operator from the left side. [Figure 13] FIG. 2 is an explanatory diagram showing an example of a safety belt used by a worker. [Figure 14] FIG. 10 is an explanatory diagram showing a second embodiment of a fire hydrant device installed on the road surface of a guard passage. [Figure 15] FIG. 15 is an explanatory diagram showing the fire hydrant device of FIG. 14 from the front. [Figure 16] FIG. 15 is an explanatory diagram showing the fire hydrant device of FIG. 14 together with an operator from the left side. [Figure 17] 15 is an explanatory diagram showing the fire hydrant door of FIG. 14 taken out from the back and side. [Figure 18] 18 is an explanatory diagram showing the fire hydrant door of FIG. 17 from the back and side with the footboard and support leg platform structure unfolded. DETAILED DESCRIPTION OF THE INVENTION

[0026] Hereinafter, an embodiment of a fire hydrant device according to the present invention will be described with reference to the drawings. However, the present invention is not limited to the following embodiment.

[0027] [Basic concept of the embodiment] First, the basic concept of the embodiment will be described. The embodiment generally relates to a fire hydrant device that is installed in an exposed position in a guard passageway provided along a tunnel wall.

[0028] Here, a "fire hydrant device" is a type of emergency equipment installed in areas subject to fire extinguishing, such as tunnels on expressways and motorways, and is equipped with or houses fire hydrant equipment such as fire hoses, electrical equipment such as red indicator lights and transmitters, terminal boxes, and fire extinguishers, and is a concept that includes fire hydrant facilities with fire hydrant devices installed.

[0029] In addition, the fire hydrant device of the embodiment is installed at a predetermined height above the road surface of a monitor's passageway that is provided along the tunnel wall, so that it is close to or abuts the tunnel wall, and includes fire hydrant devices installed in a "wall-mounted structure" or "stationary structure" in which the fire hydrant device is installed in an exposed state in the monitor's passageway.

[0030] As explained in the background art, a "wall-mounted structure" is a structure that allows a fire hydrant device to be installed by hanging it on the tunnel wall, for example, by installing a mount on the tunnel wall and fastening the fire hydrant device to the installed mount. Also, a "stationary structure" is a structure that allows a fire hydrant device to be installed on the road surface of the guard passage, for example, by installing a mount on the road surface of the guard passage and fastening the fire hydrant device to the installed mount.

[0031] Furthermore, "mounting" refers to a structure that supports an object using pillars and beams, etc., and includes concepts such as support base, foundation, base, seat, and base. Furthermore, "installed close to or in contact with the tunnel wall" includes installation close to the tunnel wall, installation with a portion in contact with the tunnel wall, or installation with a portion fixed to the tunnel wall.

[0032] In addition, the fire hydrant device of the embodiment is provided with a fire hydrant door that opens downward around the lower end and a maintenance door that opens upward around the upper end on the front of the housing. Therefore, in the event of a fire, road users open the fire hydrant door and pull out the fire hose to carry out firefighting activities. Furthermore, when inspecting or repairing valves stored and arranged inside the housing or connecting test equipment to the inspection joint to perform a water discharge test, the fire hydrant door and maintenance door are opened and workers perform the necessary work in the monitor's walkway.

[0033] The fire hydrant device of the embodiment has a step structure on the back side of the fire hydrant door that can be used when the fire hydrant door is open and facing downward.

[0034] Here, the "step stool structure" is stored in a folded state on the back side of the fire hydrant door, and can be unfolded and used when the worker opens the fire hydrant door with the back side exposed forward.

[0035] Therefore, workers can stand on the unfolded platform structure to perform the necessary work such as inspection, repair, and water discharge tests.This makes it easier to perform work by bringing the worker's hands as close as possible to the equipment in question, even if the equipment is stored or placed in a housing that is high above the monitor's walkway, reducing the worker's workload and increasing work efficiency.In addition, even when working on a monitor's walkway facing the road inside a tunnel where vehicles are passing, a stable working posture can be adopted, ensuring a high level of safety.

[0036] The "step structure" in the embodiment is any structure that allows a worker to stand on the guard passage at a position higher than the road surface by opening and unfolding the fire hydrant door, and is, for example, composed of a "step" and a "step holding mechanism."

[0037] Here, the term "step" refers to a plate member that is pivotally supported on the lower end of the back surface of the hydrant door located in front so that it can be opened and closed in the front-to-rear direction when the hydrant door is open facing downward, and is a concept that also includes any appropriate member that a person can stand on, such as a scaffold or a pedestal. Also, the term "step holding mechanism" refers to a mechanism that keeps the step that has been rotated forward in a horizontal position when the hydrant door is open facing downward. Note that "horizontal" is not limited to being parallel to the horizontal indicated by a spirit level, but also includes "approximately horizontal" that is approximately parallel to the horizontal indicated by a spirit level, and the same applies to "vertical."

[0038] The "step holding mechanism" may have any configuration, but for example, a two-bar link may be used. In this case, the "step holding mechanism" comprises a pair of two-bar links, one end of which is pivotally supported on each of the left and right sides of the front of the step, and the other end of which is pivotally supported at a predetermined position on the back surface of the hydrant door, and the length of each link arm of the two-bar link is set so that when the step is closed and abutting against the back surface of the hydrant door, the link arms of the two-bar link bend to a position where they overlap, and when the step is opened horizontally, the link arms of the two-bar link extend to a position where they are lined up in a straight line.

[0039] For this reason, when the hydrant door is closed, the step and step retention mechanism are folded up on the back side of the door, allowing for compact storage in a small space. When inspecting or repairing the equipment inside the enclosure, a worker opens the hydrant door downwards around the bottom end, exposing the step structure, including the step and step retention mechanism stored on the back side of the door, to the front. The step rotates forward to a horizontal position, allowing the worker to stand on the step, and the step retention mechanism keeps the step securely horizontal, allowing for stable work. Furthermore, by using a two-bar link in the step retention structure, a simple and compact mechanism can be used to reliably keep the step deployed forward in a horizontal position.

[0040] The "step structure" also includes a support leg mechanism. Here, the "support leg mechanism" is a mechanism that extends below the footboard and supports (supports) the footboard on the road surface of the guard passage when the fire hydrant door is rotated downward and opened horizontally.

[0041] The "support leg mechanism" may have any configuration, but may, for example, be comprised of a "support leg" and a "link arm." Here, the "support legs" are a pair of columnar members pivotally supported on both the left and right ends of the front back surface of the tread so as to be freely rotatable in the left-right direction. The "link arms" are a pair of link members, one end of which is pivotally supported in the center of the support leg, and the other end of which is pivotally supported so as to be freely slidable in a guide slot formed along the front end of the tread.

[0042] The lengths of the link arm and the long guide hole are set so that when the support leg is closed so as to abut against the back surface of the tread, the other end of the link arm is located at the center of the long guide hole, and when the support leg is opened approximately vertically, the other end of the link arm is located at the outer end of the long guide hole.

[0043] For this reason, the step that rotates forward from the back surface of the hydrant door is supported on the road surface of the guard passage by the support leg mechanism attached to the underside of the step, and the load applied to the step when a worker stands on it is mostly borne by the support leg mechanism erected on the road surface of the guard passage. As a result, the load applied to the axle that pivotally supports the bottom end of the hydrant door, and to the step holding mechanism if one is provided, is significantly reduced, and even if a step structure is provided, there is no need to increase the strength of the hydrant door, and it is possible to simply and easily provide a step structure on the back surface of the door.

[0044] In addition, a support leg mechanism equipped with support legs and link arms is folded and stored compactly in a small space behind the underside of the footplate that unfolds horizontally, and when the footplate is opened horizontally, a pair of support legs are opened to the left and right and held by the link arms, so that when a worker stands on the support legs above the supervisor's walkway and stands on the footplate, the footplate can be reliably held in a horizontal position even when subjected to the load, ensuring a stable working posture.

[0045] Furthermore, the support legs are provided with leg length adjustment units at the tips where they come into contact with the road surface of the guard passage, which adjust the length of the support legs. Therefore, when installing the hydrant, for example, with the hydrant door open and the treads and support legs of the step structure deployed to the usable state, the length can be adjusted in advance using the leg length adjustment units so that the bottom ends of the support legs will surely come into contact with the road surface of the guard passage. This means that when performing inspection, repair, etc. while the hydrant is in operation, the bottom ends of the support legs will surely come into contact with the road surface of the guard passage, and the treads will be kept reliably horizontal without any rattle.

[0046] In addition, in the fire hydrant device of the embodiment, a frame for storing a fire hose inside the housing is arranged, for example, in a lattice pattern, and hook position setting members are arranged at predetermined positions on the frame to set the positions for attaching the hooks on both ends of the safety belt used by the worker when the fire hydrant door is open.

[0047] For this reason, workers who open the fire hydrant door and use the unfolded step structure to inspect or repair the hydrant use a hook to attach their safety belt to the hydrant device to prevent it from falling off. However, if the position where the safety belt hook is attached is not appropriate, the hook may come off during work. Therefore, the hook can be attached to an appropriate position on the frame where the hook position setting member is installed, and the safety belt can be securely fastened to the fire hydrant device using the hook, allowing work to be carried out safely.

[0048] Specific embodiments will be described below. In the specific embodiments shown below, a fire hydrant device in which a tread is extended horizontally and held in a cantilevered state will be described as a first embodiment, and a fire hydrant device in which a support leg is further provided on the tread will be described as a second embodiment.

[0049] [Specific details of the embodiment] An embodiment of a fire hydrant device will be described below. The details will be explained separately as follows. a. First embodiment of the fire hydrant device a1. Overview of fire hydrant equipment a2. Installation of fire hydrant equipment a3. Thinner fire hydrant equipment b. Internal structure of the fire hydrant device b1. Hose storage section b2. Valve storage area c. Step structure of the fire hydrant device c1. Opening maintenance doors and fire hydrant doors during work c2. Step structure on the back of the fire hydrant door c3. Work using an expanded platform structure d. Second embodiment of the fire hydrant device d1. Overview of the support leg mechanism d2. Structure of the support leg mechanism e. Modifications of the present invention

[0050] [a. First embodiment of the fire hydrant device] We will now explain a "first embodiment of a fire hydrant device" in which the fire hydrant door is opened and the footboard located on the back side is deployed horizontally and held in a cantilevered state.

[0051] (a1. Overview of fire hydrant equipment) First, an overview of the fire hydrant device of the first embodiment will be described with reference to Fig. 1, which shows the first embodiment of the fire hydrant device installed on the road surface of the guard passage, Fig. 2, which shows the fire hydrant device of Fig. 1 from the front, and Fig. 3, which shows the fire hydrant device of Fig. 1 from the left side.

[0052] 1 to 3, the X, Y, and Z directions are perpendicular to each other. Specifically, when looking at the front face of the fire hydrant device 10, the X direction is the left-right direction, the Y direction is the up-down direction, and the Z direction is the front-to-back direction. The +X side in the X direction is the right side, the -X side is the left side, the +Y side in the Y direction is the top side, the -Y side is the bottom side, and the +Z side in the Z direction is the front side, and the -Z side is the rear side. This also applies to FIGS. 4 to 18, which illustrate embodiments of the present invention.

[0053] As shown in Figures 1 and 2, the fire hydrant device 10 is installed on a stand 32 installed on the road surface of the monitor passage 34, and the housing of the fire hydrant device 10 is divided into a first housing 11a, a second housing 11b, and a third housing 11c.

[0054] A decorative frame 12a is attached to the front of the first housing 11a. A fire hydrant door 14 is disposed below the door opening 13 of the decorative frame 12a. When the lock is released by operating the door opening / closing handle 1420, the fire hydrant door 14 opens downward around its lower end as an axis to a position perpendicular to the road surface of the monitor passage 34. A door storage recess 1411 is formed on the front of the housing below the door so that the fire hydrant door 14 opens to a position perpendicular to the road surface of the monitor passage 34.

[0055] Furthermore, above the door opening 13 of the decorative frame 12a, a maintenance door 15 is disposed, which opens upward around its upper end as an axis above the door opening 13. The upward-opening maintenance door 15 is kept open by a stay (support rod) disposed inside the door.

[0056] As will be described later, the fire hydrant storage section inside the first housing 11a has a hose storage section on the lower side for storing fire hoses, and a valve storage section on the upper side for storing valves such as fire hydrant valves.

[0057] A decorative frame 12b is attached to the front of the second housing 11b. An electrical door 18 that opens sideways to the right is disposed on the right side of the door opening of the decorative frame 12b, and an auxiliary door 20 that opens sideways to the left is disposed on the left side to allow access to the internal terminal boxes 30a and 30b.

[0058] In this embodiment, the storage space of the second housing 11b is expanded by the amount of the auxiliary door 20, and it is now possible to store the terminal boxes 30a, 30b, which were previously placed in the third housing 11c, in the second housing 11b.

[0059] The electrically equipped door 18 is provided with electrical equipment such as a red indicator light 22, a transmitter 24, and a response lamp 28, and is also provided with a telephone jack 26 on the inside. The red indicator light 22 is always lit, allowing the location of the fire hydrant device 10 to be confirmed from a distance. When the transmitter 24 is pressed and the push button switch is turned on in the event of a fire or other incident, it transmits a transmission signal, which is received by a disaster prevention receiving panel installed in an electrical room or the like and outputs a fire alarm. When the fire hydrant device 10 receives a response signal from the disaster prevention receiving panel, it causes the red indicator light 22 to flash and the response lamp 28 to light up.

[0060] A high-voltage terminal box 30a and a low-voltage terminal box 30b are arranged side by side in the vertical direction on the rear surface of the second housing 11b opposite the auxiliary door 20. The high-voltage terminal box 30a uses a built-in terminal block to connect the high-voltage cable drawn from outside the fire hydrant device 10 to the red indicator light 22. The low-voltage terminal box 30b uses a built-in terminal block to connect the low-voltage cable drawn from outside the fire hydrant device 10 to the transmitter 24, the response lamp 28, the telephone jack 26, etc.

[0061] A decorative frame 12c is attached to the front of the third housing 11c. A fire extinguisher door 16 that opens sideways to the left is disposed in the door opening of the decorative frame 12c, and two fire extinguishers 19 are stored in a fire extinguisher storage section inside the third housing 11c. In addition, a viewing window 17 is provided in the fire extinguisher door 16, so that the presence or absence of the fire extinguisher 19 can be confirmed from the outside.

[0062] (a2. Installation of fire hydrant equipment) Next, the installation of the fire hydrant device relative to the guard passage will be explained. As shown in Figure 3, a road 38 is constructed in the longitudinal direction of the tunnel (left and right direction in Figure 2) below the cylindrical (circular cross section) tunnel body constructed by the shield tunneling method, and a guard passage 34 is constructed at a predetermined height above the road 38 below the tunnel wall 25 along the road 38. The inside of the guard passage 34 is a duct in which a water supply main pipe 40 and distribution cables are laid, and a water supply pipe 36 branches off from the water supply main pipe 40 and is drawn into the fire hydrant device 10.

[0063] Since it is difficult to cut out a box on the tunnel wall 25 when using the shield tunneling method to install the fire hydrant device 10, the fire hydrant device 10 is installed by placing a stand 32 on the road surface of the monitor's passage 34 close to the tunnel wall 25, and then attaching and fixing the connected first housing 11a, second housing 11b, and third housing 11c to the stand 32. In addition, the top of the fire hydrant device 10 is fixed to the tunnel wall 25 by a housing support member 42 to prevent it from falling forward.

[0064] Here, the height of the stand 32 is set so that the height from the road surface of the monitor's passage 34 to all operating objects, including the transmitter 24 and water discharge nozzles arranged on the fire hydrant device 10, falls within the legally defined appropriate operation range. If the road surface of the monitor's passage 34 is taken as the standing position of road users, as is well known, the legally defined appropriate operation range has a lower limit height H1 from the road surface of 800 mm and an upper limit height H2 of 1500 mm, and therefore the vertical width ΔH (= H2 - H1) of the appropriate operation range is 700 mm.

[0065] In order to ensure that the entire vertical width (height) of the hose storage section formed on the underside of the first housing 11a, which serves as the hydrant storage section of the hydrant device 10, falls within the vertical width ΔH (=700 mm) of the appropriate operation range, the installation height of the fire hydrant device 10 on the stand 32, i.e., the height from the road surface of the monitor passage 34 to the bottom surface of the fire hydrant device 10 (bottom surface of the housing), is 800 mm, the same as the lower limit H1 of the appropriate operation range. Also, the height H3 from the road surface of the monitor passage 34 to the top surface of the housing of the fire hydrant device 10 is a predetermined height within the range of approximately 1800 to 2000 mm.

[0066] As shown in FIG. 3, the side shape of the platform 32 of this embodiment is an inverted trapezoid with the top side longer than the bottom side, and the rear side is an inclined surface that slopes diagonally downward along the curved shape of the tunnel wall surface 25.

[0067] (a3. Thinner fire hydrant devices) Next, we will explain how to make the fire hydrant device as thin as possible. As shown in Figure 3, in order to reduce the restriction on the passage width of the monitor passage 34 caused by the protrusion (projection) of the fire hydrant device 10, which is installed on the road surface of the monitor passage 34 by the stand 32, from the tunnel wall surface 25, the fire hydrant device 10 is made as thin as possible.

[0068] Of the equipment stored in the fire hydrant device 10, the fire extinguisher 19 stored in the third housing 11c has the largest size in the front-to-back direction, and since the thickness (width in the front-to-back direction) of the fire hydrant device 10 can be made thin enough to allow the fire extinguisher 19 to be stored in the third housing 11c, the width (depth) of the fire hydrant device 10 is set to a predetermined width corresponding to the outer diameter of the fire extinguisher 19 stored in the third housing 11c.

[0069] The outer diameter of the fire extinguisher 19 is about 160 to 180 mm, and if a gap is secured so that the stored fire extinguisher does not come into contact with the third housing 11c, the minimum width (minimum thickness) of the fire hydrant device 10 is, for example, 250 mm or less, and the width of the fire hydrant device 10 is set to, for example, 250 mm. In contrast, the width of a conventional fire hydrant device 10 that is installed by cutting a box out of the wall surface of the tunnel body and embedding it in place is 300 mm or more, so the fire hydrant device 10 of this embodiment has a thinner width than the conventional device.

[0070] In addition, in order to store a fire hose of the same specified length as a conventional fire hydrant device, for example, a 30 m shape-retaining hose, in an inwardly coiled state, the first housing 11a of the fire hydrant device 10 has a larger width (width in the left-right direction) than the conventional fire hydrant device, making it possible to store a shape-retaining hose of the same specified length as a conventional fire hydrant device in an inwardly coiled state.

[0071] In addition, in conventional fire hydrant devices, terminal boxes 30a, 30b were arranged on the rear surface of the housing behind the fire extinguisher storage section in which the fire extinguisher was stored, but as the fire hydrant device 10 has been made thinner, it has become impossible to arrange the terminal boxes 30a, 30b on the rear surface of the housing behind the fire extinguisher storage section, so the width (left-right width) of the second housing 11b in which the electrical equipment is installed has been expanded to a width that allows the electrical equipment and terminal boxes to be arranged.

[0072] [b. Internal structure of the fire hydrant device] Next, the internal structure of the fire hydrant device will be described with reference to Figure 4, which shows the internal structure of the fire hydrant storage section of the fire hydrant device of Figure 1 from the front with the front of the housing open.

[0073] The interior of the first housing 11a, which serves as the hydrant storage section, is divided into a lower hose storage section 44 and an upper valve storage section 45. The vertical width Hw of the hose storage section 44 is 700 mm, the same as the vertical width ΔH of the appropriate operation range shown in FIG.

[0074] (b1. Hose storage section) The hose storage section 44 will be described in more detail. In the hose storage section 44, a partition plate 46 is arranged as a horizontal plate at a height of 700 mm from the bottom surface of the first housing 11a, which corresponds to the vertical width ΔH of the appropriate operation range, and a partition plate 47 is arranged as a vertical plate at the left end of the partition plate 46, leaving a piping space, thereby forming a box-shaped area that is open to the front. Note that the partition plates 46 and 47 may be a single plate bent into an L shape.

[0075] Cylindrical or columnar frame members 48 are provided at intervals vertically and horizontally at the front opening of the hose storage section 44, thereby arranging a lattice to support the front side of the fire hose 54, and a hose outlet 50 partitioned into a rectangle by the frame members 48 is formed in the center of the front opening.

[0076] The fire hose 54 is stored inside the hose storage section 44, wound inward in a vertical direction. Here, the vertical width of the hose storage section 44 is 700 mm, and the horizontal width is, for example, about 1200 mm, so the length of one turn of the fire hose 54 is roughly 3.5 m, and if the length of the fire hose 52 is, for example, 30 m, it can be stored by winding it inward about 8 to 9 turns.

[0077] A nozzle 56 is attached to the tip of the fire hose 54 pulled out from the hose outlet 50. The nozzle 56 is detachably held in a nozzle holder 58 fixed to the frame member 48 on the right side of the hose outlet 50.

[0078] An operation box 70 for remotely operating the hydrant valve 62 is disposed in front of the frame member 48 on the left side of the hose outlet 50, and a fire hydrant valve opening / closing lever 72 that can be rotated up and down is provided on the operation box 70. The position of the fire hydrant valve opening / closing lever 72 shown in Figure 4 is the closed position, and when rotated downward is the open position.

[0079] A fire pump start-up interlocking switch 78 is provided inside the operation box 70. The fire pump start-up interlocking switch 78 turns on when the fire hydrant valve opening / closing lever 72 is operated to the open position, and sends a pump start signal to the disaster prevention receiving panel to start the fire pump equipment.

[0080] A pump start switch 80 is provided on the left side of the frame member 48 on which the operation box 70 is disposed. When a firefighter connects a hose to the hydrant 60 to extinguish a fire, the pump start switch 80 is turned on by pushing a button, and a pump start signal is sent to the disaster prevention receiving panel to start the fire pump equipment.

[0081] (b2. Valve storage area) The valve storage section 45 will be described in more detail. As shown in Fig. 4, the water supply pipe 36, which is erected via the stand 32, is drawn into a piping space formed to the left of the hose storage section 44 on the lower left side of the first housing 11a, and is connected to a branch joint 82 followed by a valve pipe 84 and a water hydrant 60 used by the fire brigade.

[0082] The branch joint 82 branches off horizontally (to the left) and is connected to the upper side of the valve piping 84, which is arranged horizontally (to the right) after rising up into the valve storage section 45. The valve piping 84 arranged horizontally is provided with a fire hydrant valve 62, an automatic pressure regulating valve 64, and an inspection joint 66, in that order from the left side.

[0083] The fire hydrant valve 62 is provided with an interlocking box 74, and a wire 76 connects it to an operation box 70 located in front of the hose storage section 44. A known wire link mechanism is configured in which the rotation associated with the opening and closing operation of the fire hydrant valve opening / closing lever 72 of the operation box 70 is transmitted to the interlocking box 74 via the wire 76 to open and close the fire hydrant valve 62.

[0084] The automatic pressure regulating valve 64 adjusts the pressure of the fire water supplied to the fire hose 54 so as to maintain a predetermined pressure. The inspection joint 66 is used to perform an actual water discharge test by attaching a water discharge test jig.

[0085] The valve pipe 84 continuing from the inspection joint 66 faces downward at its right end and is connected to the hose connection pipe 52, which is arranged vertically at the right end of the hose storage section 44. The hose connection pipe 52 bends to the left at the bottom end of the hose storage section 44, and the base side of the fire hose 54 is connected to its tip. An automatic drain valve 68 is also provided at the bottom end of the hose connection pipe 52.

[0086] The automatic drain valve 68 is open when the fire hydrant valve 62 is closed and no pressure is applied, and enables the draining of fire water remaining in the valve piping 84 and fire hose 54, which are on the secondary side of the fire hydrant valve 62. The automatic drain valve 68 closes when pressure is applied due to the supply of fire water when the fire hydrant valve 62 is opened.

[0087] [c. Step structure of fire hydrant equipment] Next, the step structure provided in the first embodiment of the fire hydrant device will be described.

[0088] (c1. Opening of maintenance doors and fire hydrant doors during work) First, the opening of the maintenance door and the hydrant door when working on the equipment housed in the fire hydrant device will be described. In this description, reference will be made to Fig. 5, which shows the maintenance door and the hydrant door of the fire hydrant device in an open state, Fig. 6, which shows the fire hydrant device of Fig. 5 from the left side, and Fig. 7, which shows the fire hydrant device of Fig. 5 from the front. Note that Fig. 5 and Fig. 14, which will be described later, omit illustration of the equipment housed in the first housing.

[0089] 5 to 7, when work is to be performed on the equipment stored or arranged in the fire hydrant device 10, the door open / close handle 1410 of the hydrant door 14 is operated to release the lock, and the hydrant door 14 is rotated downward around its lower end as an axis, exposing the hydrant storage section 44 to the outside. In addition, the maintenance door 15 is rotated upward to open it and is held in place by a stay 1510, exposing the valve storage section 45 to the outside.

[0090] When the fire hydrant door 14 is opened, the back surface faces forward, and a step structure equipped with a step board 100 is stored in a folded state on the back surface of the fire hydrant door 14.

[0091] (c2. Step structure on the back of the fire hydrant door) Next, the step structure on the back of the fire hydrant door will be explained. In this explanation, reference will be made to Fig. 8, which shows the fire hydrant door of Fig. 5 taken out and shown from the back and side, and Fig. 9, which shows the fire hydrant door of Fig. 8 unfolded and shown from the back and side. Note that Fig. 8(A) shows the back of the fire hydrant door from the front, Fig. 8(B) shows the left side of the fire hydrant door of Fig. 8(A), and Fig. 8(C) shows a cross section taken along the cutting line aa in Fig. 8(A). Fig. 9(A) shows the back of the fire hydrant door from the front with the step unfolded, and Fig. 9(B) shows the left side of Fig. 9(A).

[0092] As shown in Figure 8, a step structure is stored in a folded state on the back side of the open hydrant door 14. A door frame with a rectangular cross section is formed on the back side of the hydrant door 14, surrounding the periphery of the door, ensuring the strength (rigidity) of the door. A shaft member 1414 passes through the upper end of the open hydrant door 14 in the horizontal direction, with both ends protruding to the left and right and rotatably supported by bearings located on the left and right lower sides of the door opening shown in Figures 1 and 2. A stopper or the like may be attached to the step 100 to prevent it from falling down when the hydrant door 14 is opened.

[0093] Support frames 104, for example, made of L-shaped angle bars, are fixed in the vertical direction near both sides of the back surface of the hydrant door 14. A step 100 is rotatably supported by a shaft member 102 at the door lower end side of the support frame 104 and is folded behind the back surface of the hydrant door 14. In addition, a two-bar link 106 is disposed in a folded state between the step 100 and the support frame 104. The two-bar link 106 constitutes a step holding mechanism for holding the step 100 in a horizontal position after it has been rotated downward by the shaft member 102 and unfolded. In addition, a notch 1412 is formed in the step 100 at a position corresponding to the back side of the opening / closing door handle 1410 disposed on the hydrant door 14, allowing the step 100 to be folded behind the door back surface without being obstructed by the part of the opening / closing door handle 1410 that protrudes behind the door.

[0094] As shown in Figure 8, when the fire hydrant door 14 is open and the step 100 stored in a folded state on the back surface rotates downward, the step 100 unfolds to a horizontal position protruding forward from the lower side of the back surface of the fire hydrant door 14 as shown in Figure 9, and the unfolded forward step 100 is kept in a horizontal position by the two-bar link 106 extended linearly.

[0095] As shown in Figure 9(B), the two-bar link 106 has a pair of link arms 106a, 106b rotatably supported by an intermediate fulcrum shaft 105, the upper end of the link arm 106a is rotatably supported on the support frame 104 by a fulcrum shaft 110, and the lower end of the link arm 106b is rotatably supported on the side of the tip of the tread 100 by a fulcrum shaft 108.

[0096] Therefore, when the tread 100 is stored on the back of the fire hydrant door 14 shown in Figures 7 and 8, the two-section link 106 is stored in a folded state with the link arms 106a and 106b on both sides overlapping around the intermediate fulcrum shaft 105.

[0097] In contrast, as shown in FIG. 9(B), when the step 100 is deployed forward, the link arms 106a and 106b of the two-bar link 106 extend so as to be aligned in a straight line, keeping the step 100 in a horizontal position.

[0098] Here, in order for the two-bar link 106 to maintain the tread 100 in a horizontal position, if the lengths of the sides of the right triangle formed by the shaft member 102 and the fulcrum shafts 108, 110 in the unfolded state of FIG. 9(B) are L1, L2, and L3, the link length L3 when the two-bar link 106 advances linearly is: L3={(L1) 2 +(L2) 2} 1 / 2 The length of the link arms 106a and 106b is (L3 / 2 1 / 2 ) can be used.

[0099] Furthermore, the length (board width) L1 in the front-to-rear direction of the step 100, which is extended forward and held horizontally by the two-section link 106, is arbitrary, but taking into consideration the shoe size of the worker who will be standing on the step 100, it is desirable for the length (board width) to be about 30 cm, but it may also be shorter than that, and for example, it may be at least 20 cm in length (board width) so that more than half of the front of the shoe is placed on the step 100.

[0100] (c3. Work using an expanded platform structure) Next, we will explain work using the step structure deployed from the back of the open fire hydrant door. In this explanation, we will refer to Figure 10, which shows the state of work such as inspection and repair of the fire hydrant device, Figure 11, which shows the fire hydrant device of Figure 10 from the front, Figure 12, which shows the fire hydrant device of Figure 10 from the left side together with the worker, and Figure 13, which shows an example of a safety belt used by the worker.

[0101] As shown in Figures 10 and 11, the hydrant door 14 is opened, and then the step 100 stored on the back side of the hydrant door 14 is unfolded forward and held horizontally by the two-bar link 106. As shown in Figure 12, a worker 130 stands on the unfolded step 100 and performs work on valves such as hydrant valves and automatic pressure regulating valves that are stored and arranged in the valve storage section 45 of the hydrant device 10. In this case, the worker 130 uses a safety belt 92 to prevent falling or slipping off, thereby ensuring safety.

[0102] 13, the safety belt 92 used by the worker 130 comprises a belt 96 made of a flexible reinforced material and having a predetermined length, with hooks 94 attached to both ends, and the belt 96 is provided with an elastic buckle 98 for adjusting the belt length. The hook 94 has a hook-shaped fixed part 9410 and a movable part 9412 that is rotatable only on the inside of the fixed part 9410, and the safety belt 92 is fixed by hanging the hook 94 at a predetermined position on the frame member 48 that is exposed to the outside when the fire hydrant door 14 shown in FIGS. 10 and 11 is opened.

[0103] In this embodiment, hook position setting members 90 are disposed at two locations on the left and right of the upper frame and two locations on the left and right of the lower frame of the frame member 48. The hook position setting members 90 are members that indicate the appropriate positions of the frame member 48 for hanging the hooks 94 of the safety belt 92, and may have any shape or structure, but for example, the hook position setting members 90 are ring members that are detachably fitted to the frame pipes.

[0104] In this way, for example, by arranging ring-shaped hook position setting members 90 at two locations on the left and right sides of the frame member 48, the safety belt 92 can be fixed in the appropriate position by hanging the hook 94 of the safety belt 92 on the frame pipe on the outside of the hook position setting member 90, thereby enabling safe work.

[0105] As shown in FIG. 12, the height H4 of the step 100 deployed from the back side of the hydrant door 14 from the road surface of the monitor's passage 34 is arbitrary, but is, for example, approximately 30 cm. Therefore, the worker 130 standing on the step 100 works at a height approximately 30 cm higher than when standing on the road surface of the monitor's passage 34. For example, as shown in FIG. 4, this allows the worker 130 to perform inspection and repair work on the hydrant valves 62 and automatic pressure regulating valves 64 stored and arranged in the valve storage section 45, or to perform water discharge tests by attaching a test jig to the inspection coupling 66, by positioning the worker's hands closer to the equipment. Furthermore, working in a natural posture makes the work easier and improves work efficiency. Furthermore, a stable working posture ensures high safety even when working at a height above the road surface of the monitor's passage 34, in addition to wearing a safety belt 92.

[0106] [d. Second embodiment of the fire hydrant device] Next, a second embodiment of a fire hydrant device having a step structure in which a support leg mechanism is provided on a tread will be described. In this description, reference will be made to Fig. 14, which shows the second embodiment of the fire hydrant device installed on the road surface of the guard passage, Fig. 15, which shows the fire hydrant device of Fig. 14 from the front, and Fig. 16, which shows the fire hydrant device of Fig. 14 from the left side together with a worker.

[0107] As shown in Figures 14 to 16, when inspecting or repairing the fire hydrant device 10 of this embodiment, the hydrant door 14 is opened, and the maintenance door 15 is opened and held in place by a stay 1510. Next, a step 100 with a step structure stored on the back side of the open fire hydrant door 14 is unfolded and held in a horizontal position by a two-bar link 106. This type of step structure is similar to that of the first embodiment of the fire hydrant device 10 shown in Figures 1 to 9, so the same reference numerals are used and a description thereof will be omitted.

[0108] (d1. Overview of the support leg mechanism) This embodiment is characterized by the inclusion of a support leg mechanism that supports the unfolded platform 100 on the guard passage 34. The support leg mechanism is stored in a folded state on the front back surface of the step board 100, and as shown in Figures 14 to 16, when the step board 100 is unfolded forward and held horizontally by the two-bar link 106, a pair of support legs 112 are rotated to the left and right around both ends of the front back surface of the step board 100 as axes to stand up, and at the same time, the link arm 116 is unfolded to maintain the upright state of the support legs 112, and the unfolded support legs 112 support the step board 100 on the road surface of the guard passage 34.

[0109] (d2. Structure of the support leg mechanism) Next, the support leg structure provided in this embodiment will be described. In this description, reference will be made to Fig. 17, which shows the fire hydrant door of Fig. 14 removed and from the back and side, and Fig. 18, which shows the fire hydrant door of Fig. 17 from the back and side with the step structure deployed. Fig. 17(A) shows the back of the fire hydrant door from the front, Fig. 17(B) shows the left side of the fire hydrant door of Fig. 17(A), and Fig. 17(C) shows a cross section taken along the section line cc in Fig. 17(A). Fig. 18(A) shows the back of the fire hydrant door from the front with the treads and support legs deployed, and Fig. 18(B) shows a cross section taken along the section line dd in Fig. 18(A).

[0110] The support leg mechanism of the tread 100 is a mechanism that supports the tread 100 on the road surface of the guard passage 34, and its structure and function are arbitrary, but for example, as shown in Fig. 17, a pair of support legs 112 are pivotally supported by shaft members 114 on both sides of the back surface of the door that is in front of the tread 100 when it is deployed, located on the back side of the hydrant door 14. Here, the base side of the support legs 112 is pivotally supported by the shaft members 114 so as to be able to rotate freely between the door frame and a bearing member 126 made of an L-shaped angle bar located on the back surface of the tread 100.

[0111] Therefore, as shown in Figure 18, when the step 100 is unfolded and held horizontally by the two-section link 106, the support legs 112, which are stored in a folded state on both sides of the back surface of the tip end of the step 100, rotate on both sides in the left and right directions around the shaft member 114 and unfold into a vertical position, thereby standing on the road surface of the guard passage 34.

[0112] Furthermore, in order to maintain the support leg mechanism in a vertical state in which the support leg 112 is deployed, i.e., in a state in which the support leg 112 stands upright on the road surface of the guard passage 34, a link arm 116 and a guide slot 120 are provided for the support leg 112. Although the guide slot 120 is shown divided into left and right halves in Fig. 18, it is also possible for the two to be connected.

[0113] One end of the link arm 116 is rotatably supported by a fulcrum shaft 118 near the center of the support leg 112, and a guide pin 122 provided at the other end is slidably arranged in a guide slot 120 formed on both sides of the front end of the tread 100.

[0114] When the step board 100 is stored as shown in Figure 17, the guide pin 122 moves to the end side closer to the center of the guide slot 120, and is stored so that it overlaps the front end face of the step board 100.

[0115] Furthermore, when the step 100 is unfolded horizontally and held by the two-section link 106, and in this state the support leg 112 rotates downward around the shaft member 114 and stands up, the guide pin 122 of the link arm 116 moves to both ends of the guide slot 120 in the left-right direction, and is positioned diagonally at the corner between the step 100 and the support leg 112, as shown in Figure 18(A), thereby holding the support leg 112 upright on the road surface of the guard passage 34.

[0116] Furthermore, a leg length adjustment unit 124 is provided at the tip of the support leg 112. The structure and function of the leg length adjustment unit 124 are subject to approval, but for example, it may have a structure in which a bolt is embedded in a resin support disk, made to stand up, and screwed into a screw hole formed at the bottom end of the support leg 112, and by turning the bolt with the support disk, the distance (height) between the tip of the support leg 112 and the support disk can be adjusted.

[0117] The length of the support leg 112 can be adjusted using the leg length adjustment unit 124 by rotating the support leg 112 at the tip of the footplate 100, which is open forward, and deploying it in an upright position, as shown in Figure 18, once the fire hydrant device has been installed in the tunnel.If a gap occurs between the support leg 112 and the road surface of the guard passage 34, the leg length adjustment unit 112 is adjusted to lower the height, eliminating the gap, thereby reliably preventing the footplate 100 deployed in the guard passage 34 from wobbling.

[0118] In this way, when the support leg mechanism of the step 100 is unfolded and supported upright on the road surface of the guard passage 34 by the support leg 112, as shown in Figure 16, most of the load of the worker 130 standing on the step 100 is applied to the support leg 112 via the step 100.

[0119] Therefore, compared to the first embodiment in which the load of the worker 130 standing on the tread 100 shown in Fig. 12 is entirely applied to the shaft member 1414 of the open hydrant door 14, in this embodiment in which the support legs 112 are provided, the load applied to the shaft member 1414 of the hydrant door 14 and the shaft member 102 of the tread 100 is significantly reduced. Therefore, compared to the fire hydrant device 10 of the first embodiment, the fire hydrant device of the second embodiment can reduce the strength of the shaft structure that pivotally supports the hydrant door 14 and the tread 100 so that they can rotate freely, and accordingly the shaft structure can be made smaller and costs can be reduced.

[0120] [e. Modifications of the present invention] Modifications of the fire hydrant device according to the present invention will be described. In addition to the above-described embodiment, the fire hydrant device of the present invention includes the following modifications.

[0121] (Fire hydrant installed by wall-mounting structure) The above embodiment has been given as an example of a stationary structure in which a stand is installed on the road surface of the guard passage and the fire hydrant device is attached and fixed to the installed stand, thereby enabling the fire hydrant device to be installed on the road surface of the guard passage. However, the present invention is not limited to this, and the same can be applied to a wall-mounted structure in which a stand is installed on the tunnel wall and the fire hydrant device is attached and fixed to the installed stand, thereby enabling the fire hydrant device to be installed so as to be wall-mounted on the tunnel wall, by providing a step structure on the back of the fire hydrant door, which opens by rotating downward around the lower end as an axis on the front of the fire hydrant device housing.

[0122] (Step structure) In the above embodiment, when the hydrant door is opened, the step is deployed in one step on the back side of the hydrant door, but the step may be deployed in two or more steps. Also, in the above second embodiment, the step structure is equipped with both a step holding mechanism (two-section link) and a support leg mechanism (link arm), but it may also be equipped with only a support leg mechanism without a step holding mechanism.

[0123] (fire hydrant door) In the above embodiment, the hydrant door rotates downward around the lower end as an axis and opens to a position perpendicular to the road surface of the guard passage, but the hydrant door may also be opened to an inclined position where it faces diagonally downward, and the footboard located on the back of the hydrant door when opened to the inclined position may be extended forward and held in a horizontal position.

[0124] (others) Furthermore, the present invention includes appropriate modifications that do not impair the objects and advantages thereof, and is not limited to the numerical values ​​shown in the above embodiments. [Explanation of symbols]

[0125] 10: Fire hydrant equipment 11a: First cabinet 11b: Second cabinet 11c: 3rd cabinet 12a, 12b, 12c: decorative frame 14: Fire hydrant door 1410, 1610: Door opening and closing handle 1411: Door storage recess 1412:Notch 1414: Shaft member 15: Maintenance door 1510: Stay 16: Fire extinguisher door 17: Peephole 18: Electric door 19: Fire extinguisher 20: Auxiliary door 22: Red indicator light 24: Transmitter 25: Tunnel wall 26: Telephone Jack 28: Answer lamp 30a,30b:Terminal box 32: Stand 34: Guard passage 36: Water supply piping 38: Road 40: Water main 42: Housing support member 44: Hose storage section 45: Valve storage section 46: Partition board 48: Frame member 50: Hose outlet 52: Hose connection pipe 54: Fire hose 56: Nozzle 58: Nozzle holder 60: Water tap 62; Fire hydrant valve 64: Automatic pressure regulating valve 66: Inspection fitting 68: Automatic drain valve 70: Operation box 72: Fire hydrant valve opening / closing lever 74: Interlocking box 76: Wire 78: Fire pump start-up interlock switch 80: Fire pump start switch 82: Branch joint 84: Valve piping 90: Hook position setting member 92: Safety belt 94: Hook 9410: Fixed part 9412: Moving part 96: Belt 98: Elastic buckle 100:Treadboard 102: Shaft member 104,115: Support frame 105: Intermediate fulcrum axis Verse 106:2 Link 106a, 106b: Link arms 108,110: Fulcrum axis 112: Support leg 114: Shaft member 116: Link arm 118: Fulcrum axis 120: Guide slot 122: Guide pin 124: Leg length adjustment part 126: Bearing material 130: Worker

Claims

1. A fire hydrant device is installed at a predetermined height above the road surface of a guard passageway provided along the wall of a tunnel having a road, in proximity to or in contact with the tunnel wall, and has a fire hydrant door that opens downward around the lower end of the housing and a maintenance door that opens upward around the upper end of the housing, The fire hydrant device is characterized in that the fire hydrant door has a step structure that can be used in a downward open state.

2. The fire hydrant device according to claim 1, The step structure is When the fire hydrant door is opened downward, a footboard is pivotally supported on the lower end side of the back surface of the fire hydrant door located at the front so as to be freely rotatable in the front-rear direction; a step holding mechanism that holds the step rotated forward in a horizontal position when the fire hydrant door is opened downward; A fire hydrant device comprising:

3. The fire hydrant device according to claim 2, The tread holding mechanism is A pair of two-section link arms is provided, one end of which is pivotally supported on each of the left and right sides in front of the tread, and the other end of which is pivotally supported at a predetermined position on the back surface of the fire hydrant door, A fire hydrant device characterized in that the length of each link arm of the two-section link arm is set so that when the footboard is closed so as to abut against the back surface of the fire hydrant door, each link arm of the two-section link arm is bent to a position where they are overlapping, and when the footboard is opened horizontally, each link arm of the two-section link arm is extended to a position where they are lined up in a straight line.

4. The fire hydrant device according to claim 1, The step structure is When the fire hydrant door is opened downward, a footboard is pivotally supported on the lower end side of the back surface of the fire hydrant door located at the front so as to be freely rotatable in the front-rear direction; a support leg mechanism that extends below the footboard and supports the footboard on the road surface of the guard passage when the fire hydrant door is rotated downward and opened horizontally; A fire hydrant device comprising:

5. The fire hydrant device according to claim 4, The support leg mechanism includes: A pair of support legs are pivotally supported on the left and right ends of the front rear surface of the footboard so as to be rotatable in the left and right direction; a pair of link arms, one end of which is pivotally supported at the center of the support leg and the other end of which is pivotally supported slidably in a guide slot formed along the front end side of the tread; Equipped with The lengths of the link arm and the long guide hole are set so that when the support leg is closed so as to abut against the back surface of the footboard, the other end of the link arm is located on the central side of the long guide hole, and when the support leg is opened approximately perpendicular to the road surface of the guard passage, the other end of the link arm is located at the outer end of the long guide hole.

6. The fire hydrant device according to claim 5, The fire hydrant device is characterized in that the support leg is provided with a leg length adjustment portion at the tip that abuts the road surface of the monitor passage, for adjusting the length of the support leg.

7. The fire hydrant device according to claim 1, A frame for storing a fire hose is disposed inside the housing, A fire hydrant device characterized in that a hook position setting member is arranged at a predetermined position on the frame, and sets the position for engaging the hooks on both ends of the safety belt used by the worker when the fire hydrant door is open.

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