JP2024051388A - Fire hydrant device - Google Patents

Abstract

To facilitate handling of a fire hydrant by enabling expansion of a door opening without hindering passage of a monitoring person passage with opening of a fire hydrant door.SOLUTION: A fire hydrant device 10 is installed on a frame 30 installed on a road surface of a monitoring person passage 35 so as to have a prescribed height above the road surface of the monitoring person passage 35 and to approach or contact a tunnel wall surface, and comprises: a fire hydrant door 12 which is arranged in a door opening 14 on a front surface of the fire hydrant device 10; and a lift type door opening/closing mechanism 40 which includes a parallel link mechanism that is created by a first link 42 and a second link 44 and a gas damper 48 that becomes a drive part that moves the fire hydrant door 12 upward by actuating the parallel link mechanism as a door opening/closing mechanism which maintains the parallel state between the door surface of the fire hydrant door 12 and the front surface of the fire hydrant device 10 and moves the fire hydrant door 12 to the upper side of the door opening 14 to open the fire hydrant door.SELECTED DRAWING: Figure 5

Description

The present invention relates to a fire hydrant device that is installed on a tunnel wall or a guard passageway that runs along the tunnel wall.

Conventionally, fire hydrant devices are installed as emergency tunnel equipment in tunnels on expressways, motorways, etc. For example, a fire hydrant device stores a fire hose with a nozzle attached to the end and valves including a fire hydrant valve in a fire hydrant storage section inside a housing equipped with a forward-tilting fire hydrant door (forward-tilting door), and stores two fire extinguishers in a fire extinguisher storage section inside a housing equipped with a fire extinguisher door. Furthermore, fire hydrant devices are generally installed by embedding them into the tunnel wall along the length of the tunnel, for example at intervals of 50 meters, along which guard passages are provided.

However, in tunnels constructed using methods such as the shield tunneling method, the structure of the tunnel frame makes it difficult to cut a box out of the tunnel wall and embed the fire hydrant device in it due to the cost and labor involved, so it is necessary to install the fire hydrant in an exposed state in the guard passage.

For this reason, a wall-mounted structure has been proposed in which a stand is installed on the tunnel wall and the fire hydrant is attached and fixed to the stand, as a structure for installing the fire hydrant in an exposed state in the guard passage without removing the box from the tunnel wall. The stand for this wall-mounted structure is composed of a main support part that is fixed to the wall and a position-maintaining member that maintains the position of the fire hydrant (Patent Document 1).

However, installing a fire hydrant device using a wall-mounted structure has issues, such as the time and labor required to attach the device to the tunnel wall. Therefore, it is being considered to adopt a so-called stationary structure, in which a stand is placed on the road surface of the guard passage, which is easier to install, and the fire hydrant device is attached and fixed to the stand.

Conventional fire hydrant devices are equipped with an opening/closing mechanism that rotates the hydrant door by approximately 90 degrees to open and close it, but even when the tunnel wall is boxed out and the fire hydrant device is installed embedded in the tunnel, if the width of the guard passage is narrow, the fire hydrant door protrudes into the guard passage when it is opened, obstructing passage through the guard passage. In addition, when the fire hydrant device is installed in a wall-mounted or freestanding structure that exposes the fire hydrant device to the guard passage, the fire hydrant device is exposed to the guard passage when installed, so the problem of obstructing passage through the guard passage when the fire hydrant door is opened becomes more pronounced.

For this reason, in the fire hydrant device of Patent Document 2, when the fire hydrant door is opened, the upper end of the fire hydrant door can be rotated more than 90 degrees until it is positioned lower than the lower end of the fire hydrant door. This limits the amount of protrusion when the fire hydrant door is opened, and reduces the degree to which it obstructs the passage of the guards through the passageway.

In addition, to further reduce the degree of obstruction to the guard passageway, the fire hydrant device in Patent Document 3 is equipped with an opening and closing mechanism that rotates the entire fire hydrant door 180 degrees. This makes it possible to almost eliminate the amount of protrusion of the fire hydrant door when it is opened, and prevents the opening of the fire hydrant door from obstructing the guard passageway.

JP 2020-078429 A JP 2016-146906 A JP 2014-068743 A

However, with the fire hydrant door of the fire hydrant device in Patent Document 2, although the amount of protrusion when the fire hydrant door is opened is reduced, the lower end of the fire hydrant door protrudes when the fire hydrant door is opened, which may impede passage through the supervisor's passage depending on the width of the passage. Also, with the fire hydrant door of the fire hydrant device in Patent Document 3, although the opening of the fire hydrant door does not impede passage through the supervisor's passage, it is necessary to secure an area at least the same size as the door opening below the door opening on the front of the housing where the fire hydrant door is installed, which limits the size of the door opening, which may cause problems in handling the fire hydrant device, such as removing the fire hose stored inside the housing and opening the fire hydrant valve.

The present invention aims to provide a fire hydrant device that allows the door opening to be enlarged without obstructing the guard passage when the fire hydrant door is opened, making it easier to handle the hydrant.

(Fire hydrant equipment)
A fire hydrant device installed on a tunnel wall or a guard passageway along the tunnel wall,
A fire hydrant door disposed at a door opening on the front side of the fire hydrant device;
a door opening/closing mechanism that moves the fire hydrant door above the door opening while maintaining a parallel state between the door surface of the fire hydrant door and the front surface of the fire hydrant device, and opens the fire hydrant door;
The present invention is characterized by comprising:

(Opening direction of fire hydrant door by door opening/closing mechanism)
The door opening and closing mechanism opens the fire hydrant door by moving it upward while also moving it forward.

(First door opening/closing mechanism)
The door opening and closing mechanism is
a parallel link mechanism that moves the fire hydrant door upward while maintaining a parallel state between a door surface of the fire hydrant door and a front surface of the fire hydrant device;
A drive unit that operates a parallel link mechanism by extension when an operating part of the fire hydrant door is operated to open, thereby moving the fire hydrant door upward;
Equipped with.

(Second Door Opening and Closing Mechanism)
The door opening and closing mechanism is
Guide portions disposed corresponding to both sides of the door opening;
A roller portion is disposed on both sides of the fire hydrant door and moves the fire hydrant door in the up and down direction by being guided along the guide portion;
A drive unit that moves the roller unit along the guide unit by extension when the door operating unit of the fire hydrant door is operated to open, thereby moving the fire hydrant door upward;
Equipped with.

(Drive part)
The drive unit is equipped with a gas damper device that extends when the door operating unit is operated to be open and in the open position, and stops extending and holds the fire hydrant door in the stopped position when the door operating unit is not operated and in the closed position.

(Fire hydrant installation)
The fire hydrant device is installed on a stand that is placed on the road surface of the watchman's passage so that it is at a predetermined height above the road surface of the watchman's passage and is close to or abutting the tunnel wall surface.

(Recessed fire hydrant system)
The fire hydrant device is embedded into an opening formed by cutting a box out of the tunnel wall.

(Effects of fire hydrant devices)
The present invention is a fire hydrant device installed on a tunnel wall or a guard passageway provided along the tunnel wall, and is equipped with a fire hydrant door arranged at a door opening on the front of the fire hydrant device, and a door opening/closing mechanism that moves the fire hydrant door above the door opening while maintaining the parallel state of the door surface of the fire hydrant door and the front of the fire hydrant device, to open it. Therefore, the space located above the fire hydrant device can be utilized to move the fire hydrant door into that space to open the door opening, making it possible to make the vertical width of the door opening (the width perpendicular to the installation surface) large, and facilitating handling of the fire hydrant device, such as pulling out the fire hose, removing the nozzle connected to the fire hose, and operating the opening/closing operation part that opens and closes the fire hydrant valve.

In addition, the fire hydrant door moves above the door opening while maintaining the parallel state between the door surface and the front of the fire hydrant device, so even when the fire hydrant door is opened, it does not obstruct the passage of the guard through the open passageway, and because the fire hydrant door moves while maintaining the parallel state between the door surface and the front of the fire hydrant device, the fire hydrant door does not protrude more forward than necessary while opening, as with conventional rotating fire hydrant doors, ensuring high operability and safety for road users when opening the fire hydrant door.

(Effect of the opening direction of the fire hydrant door due to the door opening/closing mechanism)
The door opening and closing mechanism opens the fire hydrant door by moving it upward while moving it forward, so that even if the space above the fire hydrant device is limited, for example, because the fire hydrant device is recessed into an opening formed by cutting a box into the surface of a tunnel wall, the fire hydrant door can be moved forward as the fire hydrant door moves upward to a position where the space above is not restricted, making it possible to open the fire hydrant door by moving it upward, even if the fire hydrant device is installed in a place where the space above the fire hydrant device is limited.

(Effect of the first door opening and closing mechanism)
In addition, the fire hydrant door is equipped with a parallel link mechanism that moves the fire hydrant door upward while maintaining the parallel state between the door surface of the fire hydrant door and the front surface of the fire hydrant device, and a drive unit that activates the parallel link mechanism by extending when the operating part of the fire hydrant door is operated to open, thereby moving the fire hydrant door upward.Therefore, even when the door opening and closing mechanism uses the parallel link mechanism, it is possible to achieve both the expansion of the door opening and the prevention of obstruction of the guard passage.

(Effect of the second door opening/closing mechanism)
In addition, the door opening and closing mechanism is equipped with guide sections arranged to correspond to both side portions of the door opening, roller sections arranged on both side portions of the fire hydrant door and guiding and moving the fire hydrant door up and down along the guide sections, and a drive section that moves the roller sections along the guide sections by extending when the door operating section of the fire hydrant door is operated to open, thereby moving the fire hydrant door upward.Therefore, even in the case of a door opening and closing mechanism with a simple structure consisting of guide sections and roller sections, it is possible to achieve both the expansion of the door opening and the prevention of obstruction of passage through the guard passage.

(Effect of the drive unit)
In addition, the drive unit is equipped with a gas damper device that extends when the door operating unit is operated to be open and in the open position, and stops extending and holds the fire hydrant door in the stopped position when the door operating unit is not operated and is in the closed position, so that the fire hydrant door can be moved upward as much as necessary according to the position of the fire hydrant equipment stored inside the fire hydrant device to be operated, and then stopped in that position.

FIG. 2 is an explanatory diagram showing the fire hydrant device of the first embodiment from the front. FIG. 2 is an explanatory diagram showing the fire hydrant device of the first embodiment from the left side. 2 is an explanatory diagram showing the internal structure of the fire hydrant device of FIG. 1 from the front with the fire hydrant door opened to a fully open position. FIG. 2 is an explanatory diagram showing the internal structure of the fire hydrant device of FIG. 1 from the side. FIG. 2 is an explanatory diagram showing a lift-type door opening and closing mechanism of a fire hydrant door. FIG. 6 is an explanatory diagram showing a parallel link mechanism equivalently produced by the lift-type door opening/closing mechanism of FIG. 5 . FIG. 2 is an explanatory diagram showing a remote control mechanism of a gas damper. FIG. 8 is an explanatory diagram showing the door handle of FIG. 7 . FIG. 8 is an explanatory diagram showing a cross section of the gas damper shown in FIG. 7 . 8 is an explanatory diagram showing the operation of the gas damper of FIG. 7. 13 is an explanatory diagram showing a fire hydrant device of a second embodiment from the front with the fire hydrant door opened to a fully open position. FIG. FIG. 2 is an explanatory diagram showing the sliding door opening and closing mechanism of the fire hydrant door when the fire hydrant door is in the closed position. FIG. 1 is an explanatory diagram showing a sliding door opening and closing mechanism of a fire hydrant door with the fire hydrant door in a fully open position.

Below, an embodiment of a fire hydrant device according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the following embodiment.

[Basic Concept of the Embodiment]
First, a basic concept of the embodiment will be described. The embodiment generally relates to a fire hydrant device installed on a tunnel wall or a watchman's passageway provided along the tunnel wall.

Here, a "fire hydrant device" is a type of emergency equipment installed in areas subject to firefighting, 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 in which fire hydrant devices are installed.

In addition, "fire hydrant devices installed on the tunnel wall or guard passage" includes "embedded" fire hydrant devices that are embedded in openings formed by cutting out a box from the tunnel wall, and "wall-mounted" and "stationary" fire hydrant devices that are exposed in the guard passage. Here, "wall-mounted" refers to a fire hydrant device that is hung on the wall of the tunnel wall by installing a stand on the tunnel wall and attaching and fixing the fire hydrant device to the installed stand, etc., and "stationary" refers to a fire hydrant device that is installed on the road surface of the guard passage by installing a stand on the road surface of the guard passage and attaching and fixing the fire hydrant device to the installed stand, etc.

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

The fire hydrant device of the embodiment is characterized by having a fire hydrant door arranged in a door opening on the front side of the fire hydrant device, and a door opening/closing mechanism that moves the fire hydrant door above the door opening while maintaining a parallel state between the door surface of the fire hydrant door and the front side of the fire hydrant device, thereby opening the fire hydrant door.

Here, a "fire hydrant door" is a door that is opened when a road user accesses the inside of a fire hydrant device, and the "door opening" in which the fire hydrant door is located may have doors other than the fire hydrant door located therein. For example, a maintenance door that is opened during inspection of the fire hydrant device may be located in the door opening together with the fire hydrant door.

In addition, the "door surface of a fire hydrant door" refers to a surface that has a size corresponding to the size of the door opening, and corresponds to the front surface of the fire hydrant door that closes the door opening when placed in the door opening, or the back surface opposite to the front surface. In addition, the position of the fire hydrant door when it is open is referred to as the "open position," and the corresponding position of the fire hydrant door when the door opening is closed is referred to as the "closed position."

In addition, "parallel state between the door surface of the fire hydrant door and the front surface of the fire hydrant device" does not strictly mean that the door surface of the fire hydrant door is parallel to the front surface of the fire hydrant device, but includes the concept of being approximately parallel to the extent that it does not protrude into the watchman's passage and obstruct the watchman's passage. In addition, the opening of the fire hydrant door is not limited to movement only in the upward direction, and when the space above the fire hydrant device is limited, for example when the fire hydrant door is installed embedded in an opening formed by cutting a box out of the wall of a tunnel, the movement may include a forward component in addition to the upward component when the fire hydrant door is opened.

The "door opening and closing mechanism" may have any configuration or type, but may include, for example, a first door opening and closing mechanism that is a lift-type door opening and closing mechanism and a second door opening and closing mechanism that is a slide-type door opening and closing mechanism.

The "first door opening/closing mechanism" which is a lift-type door opening/closing mechanism includes a parallel link mechanism which moves the fire hydrant door upward while maintaining the parallel state between the door surface of the fire hydrant door and the front surface of the fire hydrant device, and a drive unit which operates the parallel link mechanism by extending when the operating unit of the fire hydrant door is operated to open, thereby moving the fire hydrant door upward.

The "second door opening/closing mechanism" which is a sliding door opening/closing mechanism includes guide sections arranged corresponding to both sides of the door opening, roller sections arranged on both sides of the fire hydrant door and which move the fire hydrant door vertically by guiding it along the guide sections, and a drive section which moves the roller sections along the guide sections by extending when the door operating section of the fire hydrant door is operated to open, thereby moving the fire hydrant door upward.

The "drive unit" of any door opening/closing mechanism may also be equipped with a gas damper device that extends when the door operating unit is operated to open and in the open position, and stops extending when the door operating unit is not operated and in the closed position, thereby holding the fire hydrant door in the stopped position.

In addition, a "gas damper device" is a device that can be remotely operated by a door operating unit, and allows the fire hydrant door to be moved or stopped by operating the door operating unit, and is a concept that includes equipment and devices equipped with a gas damper, as well as the gas damper itself. In addition, the gas damper device can stop the fire hydrant door at any open position, in which case there will be multiple "open positions," but the open position when the fire hydrant door is moved upward to its maximum extent is considered to be the "fully open position."

The "door operating section" is the part that is operated when opening and closing the fire hydrant door, and its configuration and type are arbitrary, but it includes a "door handle" that allows the fire hydrant door to be opened and closed by pulling it toward you.

Specific embodiments are described below. In the specific embodiments described below, the subject is a "stationary fire hydrant device," and the device is divided into a first embodiment in which the door opening/closing mechanism is a lift-type door opening/closing mechanism, and a second embodiment in which the door opening/closing mechanism is a slide-type door opening/closing mechanism, and the description is given for the case in which the "gas damper device" is a "gas damper" and the "door operating unit" is a "door handle."

[Specific Contents of the Embodiment]
The fire hydrant device will be explained in more detail below. The contents will be explained separately as follows.
a. First embodiment of the fire hydrant device equipped with a lift-type door opening/closing mechanism a1. Outline of the fire hydrant device a2. Installation of the fire hydrant device a3. Installation height and thinning of the fire hydrant device a4. Internal structure of the fire hydrant device b. Lift-type door opening/closing mechanism of the fire hydrant door b1. Structure of the lift-type door opening/closing mechanism b2. Remote control mechanism for the gas damper c. Second embodiment of the fire hydrant device equipped with a slide-type door opening/closing mechanism d. Built-in type fire hydrant device e. Modification of the present invention

[a. Fire hydrant device of the first embodiment equipped with a lift-type door opening and closing mechanism]
A fire hydrant device having a lift-type door opening and closing mechanism according to a first embodiment will be described below with reference to a stationary fire hydrant device.

(a1. Overview of fire hydrant equipment)
First, an overview of the fire hydrant device will be described. In this description, reference will be made to FIG. 1, which shows the fire hydrant device of the first embodiment installed on the road surface of the monitor passage from the front (front side). Here, in the description of FIG. 1, the X-Y-Z directions are mutually orthogonal directions, and specifically, when the front surface of the fire hydrant device 10 is viewed from the front, 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. Also, 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 upper side, the -Y side is the lower side, the +Z side in the Z direction is the front side, and the -Z side is the rear side. This point is also true when the X-Y-Z directions are shown in FIG. 2 to FIG. 13, which are embodiments of the present invention.

As shown in FIG. 1, the fire hydrant device 10 is installed on a stand 30 installed on the road surface of the monitor passage 35, 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.

A decorative frame 13a is attached to the front of the first housing 11a. A door opening 14 is formed in the decorative frame 13a, and a fire hydrant door 12 is arranged in the door opening 14. A fire hydrant storage section inside the first housing 11a stores a fire hydrant device including a fire hose and valves such as a fire hydrant valve. When the door handle 15 is opened, the fire hydrant door 12 of this embodiment moves upward while maintaining the front of the housing 11a and the door surface of the fire hydrant door 12 parallel to each other by a lift-type door opening/closing mechanism arranged inside the housing on both sides of the fire hydrant door 12, and can be opened to a fully open position where the door opening 14 is fully opened at the position of the fire hydrant door 12a shown by the imaginary line.

A decorative frame 13b is attached to the front of the second housing 11b. An electrical door 18 that opens sideways to the right on a hinge 18a is disposed on the right side of the door opening of the decorative frame 13b, and an auxiliary door 20 that opens sideways to the left on a hinge 20a is disposed on the left side to allow access to the internal terminal boxes 26a, 26b. The electrical door 18 is provided with electrical equipment such as a red indicator light 22, a transmitter 24, and a response lamp 25, and a telephone jack is provided on the inside.

The red indicator light 22 is always on, allowing the location of the fire hydrant device 10 to be confirmed from a distance. In addition, when the transmitter 24 is pressed and the push button switch is turned on, for example 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. The fire hydrant device 10, which receives a response signal from the disaster prevention receiving panel, flashes the red indicator light 22 and turns on the response lamp 25.

A high-voltage terminal box 26a and a low-voltage terminal box 26b are arranged vertically on the rear surface of the second housing 11b opposite the auxiliary door 20. The high-voltage terminal box 26a uses a built-in terminal block to connect the high-voltage cable pulled in from outside the fire hydrant device 10 to the red indicator light 22. The low-voltage terminal box 26b uses a built-in terminal block to connect the low-voltage cable pulled in from outside the fire hydrant device 10 to the transmitter 24, response light 25, telephone jack, etc.

A decorative frame 13c is attached to the front of the third housing 11c. A fire extinguisher door 16 that opens sideways to the left on hinges 16a is placed in the door opening of the decorative frame 13c, and two fire extinguishers 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, making it possible to check whether a fire extinguisher is present from outside.

(a2. Installation of fire hydrant devices)
Next, the installation of the fire hydrant device on the guard passage will be described with reference to Fig. 2, which shows the fire hydrant device installed on the road surface of the guard passage from the left side.

As shown in FIG. 2, a road 36 is constructed in the longitudinal direction (left-right direction) of the tunnel below the cylindrical (circular cross section) tunnel body constructed by the shield method, and a monitor passage 35 is constructed below the tunnel wall 27 along the road 36 at a predetermined height relative to the road 36. The inside of the monitor passage 35 is a duct in which a main water supply pipe and cables are laid, and a water supply pipe 51 branches off from the main water supply pipe and is drawn into the fire hydrant device 10.

Since it is difficult to cut out the box from the tunnel wall 27 in the shield construction method to install the fire hydrant device 10, the stand 30 is installed close to the tunnel wall 27 on the road surface of the watchman's passage 35, and the connected first housing 11a, second housing 11b, and third housing 11c are attached and fixed to the stand 30 to install the fire hydrant device 10. Here, the height H1 of the stand 30 is set so that the height from the road surface of the watchman's passage 35 to the transmitter 24 installed in the fire hydrant device 10 is within the legally specified range of 800 mm to 1500 mm. In addition, as shown in FIG. 2, the side shape of the stand 30 in 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 27.

In addition, there is sufficient space above the installed fire hydrant device 10 to allow the fire hydrant door 12 to be opened to the fully open position of the fire hydrant door 12a shown by the imaginary line.

(a3. Installation height and thinness of fire hydrant equipment)
Next, the installation height and thinning of the fire hydrant device will be described. As shown in Fig. 2, in order to reduce the restriction on the passage width of the monitor passage 35 due to the protrusion (protrusion) of the fire hydrant device 10 installed on the road surface of the monitor passage 35 by the stand 30 from the tunnel wall surface 27, the installation height of the fire hydrant device 10 is optimized and the fire hydrant device 10 is made as thin as possible.

The installation height of the fire hydrant device 10 is determined by the mounting base 30, so optimizing the height H1 of the mounting base 30 optimizes the installation height of the fire hydrant device 10. Since the tunnel wall surface 27 on which the fire hydrant device 10 is installed has a circular cross section, the height H1 of the mounting base 30 is set so that the horizontal housing center line SL2 passing through the center of the height direction of the fire hydrant device 10 installed on the road surface of the monitor passage 35 is as close as possible to the horizontal tunnel center line SL1 from the tunnel center (center of the circular cross section). In this case, the closer the housing center line SL2 is to the tunnel center line SL1, the less the fire hydrant device 10 protrudes from the tunnel wall surface 27.

Next, the thinning of the fire hydrant device 10 is optimized to match the equipment stored in the fire hydrant device 10. In this embodiment, the fire extinguisher stored in the third housing 11c is the largest in size in the front-to-rear direction among the equipment stored in the fire hydrant device 10, and since the thickness (width in the front-to-rear direction) of the fire hydrant device 10 can be thinned to a size that allows the fire extinguisher to be stored in the third housing 11c, the width of the fire hydrant device 10 is set to a predetermined width that corresponds to the outer diameter of the fire extinguisher stored in the third housing 11c.

The outer diameter of the fire extinguisher is about 150 to 160 mm, and if a gap is provided so that the stored fire extinguisher does not come into contact with the third housing 11c, the minimum width of the fire hydrant device 10 will be within a range of, for example, about 180 to 200 mm, and the width of the fire hydrant device 10 is set to a predetermined width within that range. In contrast, the width of a conventional fire hydrant device 10 that is installed by cutting a box out of the wall of a tunnel body and embedding it in place is about 300 mm, so the width of the fire hydrant device 10 of this embodiment can be reduced to 2/3 of the conventional width, allowing the fire hydrant device 10 to be made thinner.

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 rolled 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, so that a shape-retaining hose of the same specified length as a conventional fire hydrant device can be stored in an inwardly rolled state.

In addition, in conventional fire hydrant devices, the terminal boxes 26a, 26b were located on the rear surface of the housing behind the fire extinguisher storage section in which the fire extinguisher is stored. However, as the fire hydrant device 10 has become thinner, it is no longer possible to locate the terminal boxes 26a, 26b on the rear surface of the housing behind the fire extinguisher storage section. Therefore, the width (left-right width) of the second housing 11b in which the electrical equipment is provided has been expanded to a width that allows the electrical equipment and terminal boxes to be located.

(a4. Internal structure of fire hydrant device)
Next, the internal structure of the fire hydrant device will be described. In this description, reference will be made to Fig. 3, which shows the internal structure of the fire hydrant device from the front (front) with the fire hydrant door fully open. Note that Fig. 3 does not show the lift-type door opening and closing mechanisms disposed inside both sides of the fire hydrant door 12.

The interior of the first housing 11a, which serves as the fire hydrant storage section, is divided into a valve storage section 50a and a hose storage section 50b.

A water supply pipe 51 is drawn into the valve storage section 50a from below through the stand 30 and connected to a water hydrant 52, and the water supply pipe 51 branches downward and is connected to a fire hose 60 using a shape-retaining hose via a fire hydrant valve 54 and an automatic pressure adjustment valve (not shown). The fire hydrant valve 54 is opened and closed by a fire hydrant valve opening and closing lever 68, and a pump start switch 74 used by the fire brigade is provided to the upper right of the water hydrant 52, which is turned on when operated to send a pump start signal to the disaster prevention receiving panel.

A hose storage frame 62 is provided in the hose storage section 50b, and the fire hose 60, which is pulled in from below, is stored in a state of being wound inward in a clockwise or counterclockwise direction. Here, the hose storage frame 62 is wider than before in response to the increase in width of the first housing 11a caused by the thinning of the fire hydrant device 10, and the fire hose 60 of the same predetermined length as before can be stored with fewer turns compared to the conventional fire hydrant device.

A nozzle holder 65 is also arranged on the right side of the hose storage frame 62, and the nozzle 64 connected to the tip of the fire hose 60 removed from the hose outlet 63 of the hose storage frame 62 is detachably held in the nozzle holder 65.

The fire hydrant valve opening/closing lever 68, which functions as the opening/closing operation part for the fire hydrant valve 54, is taken out from an operation box 70 located on the front side and directly connected to the operating shaft of the fire hydrant valve 54. The fire hydrant valve opening/closing lever 68 is normally in the closed position as shown, and when it is pushed downward to the water discharge position, the fire hydrant valve 54 opens. The operation box 70 is also provided with a pump start interlocking switch 72, which is turned on when the fire hydrant valve opening/closing lever 68 is operated to the open position and sends a pump start signal to the disaster prevention receiving panel.

In addition, a telephone jack 28 is provided on the back side of the electrical door 18 of the second housing 11b, and two fire extinguishers 38 are stored in the fire extinguisher storage section inside the third housing 11c.

[b. Lift-type door opening/closing mechanism for fire hydrant doors]
Next, a lift-type door opening/closing mechanism for the fire hydrant door provided in the fire hydrant device of the first embodiment will be described.

(b1. Structure of the lift-type door opening and closing mechanism)
First, the structure of the lift-type door opening/closing mechanism will be described. In this description, reference will be made to Fig. 4, which shows the internal structure of the fire hydrant device from the right side when the fire hydrant door is fully open (fully open position), Fig. 5, which shows the lift-type door opening/closing mechanism of the fire hydrant door, and Fig. 6, which shows the parallel link mechanism equivalently created by the lift-type door opening/closing mechanism of Fig. 5. Fig. 5(A) shows the fire hydrant door in a closed state (closed position), and Fig. 5(B) shows the fire hydrant door in a fully open state (fully open position).

The fire hydrant door 12 of this embodiment is opened and closed by a lift-type door opening/closing mechanism 40 while maintaining the door surface of the fire hydrant door 12 parallel to the front surface of the housing 11a between a position where the door opening 14 of the first housing 11a is closed (closed position) as shown in FIG. 5(A) and a position where the door opening 14 of the first housing 11a is fully opened (fully open position) as shown in FIGS. 4 and 5(B). The lift-type door opening/closing mechanism 40 is disposed in the housing on both inside sides of the fire hydrant door 12 shown in FIG. 1.

As shown in FIG. 5, the lift-type door opening/closing mechanism 40 includes a first link 42 and a second link 44. One end of the first link 42 is pivotally supported by the housing fulcrum 43, and the other end is pivotally supported by the door fulcrum 41 on the lower inside of the fire hydrant door 12. One end of the second link 44 is pivotally supported by the housing fulcrum 46 disposed below the housing fulcrum 43, and the other end is pivotally supported by the door fulcrum 45 disposed below the door fulcrum 41 of the fire hydrant door 12. The pivotal support by the housing fulcrums 43 and 46 is set at a predetermined position, for example, on the hose storage frame 62 disposed within the housing 11a.

By providing the first link 42 and the second link 44 in this manner, a parallel link mechanism is equivalently formed, which is composed of the first link 42, the second link 44, the third link 53 connecting the housing fulcrums 43, 46, and the fourth link 55 connecting the door fulcrums 41, 45, as shown diagrammatically in Figure 6. Note that the first link 42 and the second link 44 are shown as straight lines in the diagrammatic view of Figure 6, but in reality, as shown in Figure 5, they have a bent link shape so that they do not hit the edge of the door opening 14 when the fire hydrant door 12 is opened.

A gas damper 48 that functions as a drive unit is provided for the first link 42. One end of the gas damper 48, which is the cylinder side, is supported by a housing fulcrum 47 on the upper inside side of the housing 11a, and the other end, which is the rod side, is supported by a link fulcrum 49 midway along the first link 42.

The gas damper 48 is equipped with a remote control mechanism that is operated by the door handle 15 described below. When the door handle 15 is in the closed position, the gas damper 48 is in a locked state in which the movement of the piston rod relative to the cylinder is fixed, and when the door handle 15 is in the open position, the gas damper 48 is in an unlocked state in which the piston rod can freely extend and retract relative to the cylinder.

When the gas damper 48 is in the unlocked state, the piston installed in the cylinder moves due to the gas pressure of the nitrogen gas or the like filled in it, and the piston rod extends, and by rotating the first link 42 rightward (clockwise) around the housing fulcrum 43, the fire hydrant door 12 can be moved to the position of the fire hydrant door 12a above the housing 11a (fully open position) as shown in Figure 5 (B).

More specifically, the rotation of the first link 42 around the housing fulcrum 43 by the gas damper 48 and the rotation of the second link 44 around the housing fulcrum 46 causes the fire hydrant door 12 to move upward in an arc-shaped trajectory from the closed position while maintaining the door surface perpendicular to the road surface of the monitor passage 35, the same as in the closed position, and the fire hydrant door 12 is lifted to the position of the fire hydrant door 12a (fully open position) above the front of the housing 11a.

(b2. Gas damper remote control mechanism)
Next, the remote control mechanism of the gas damper 48 will be described. In this description, reference will be made to FIG. 7 showing the remote control mechanism of the gas damper, FIG. 8 showing the door handle of FIG. 7 taken out, FIG. 9 showing the gas damper of FIG. 7 taken out in cross section, and FIG. 10 showing the operation of the gas damper of FIG. 7 in cross section. Note that FIG. 7 shows the remote control mechanism of the gas damper provided in the lift type door opening/closing mechanism 40 on the right side of the fire hydrant door 12, but the remote control mechanism of the gas damper provided in the lift type door opening/closing mechanism 40 on the left side of the fire hydrant door 12 is similar. In addition, FIG. 8 shows the side where the handle lever of the door handle is located as the front, FIG. 8(A) shows the internal structure of the door handle from the left side, FIG. 8(B) shows the door handle from the front (front), and FIG. 8(C) shows the door handle from the back (rear). In addition, FIG. 10(A) shows the gas damper in the locked state, and FIG. 10(B) shows the gas damper in the unlocked state.

As shown in FIG. 7, the remote control mechanism 100 is provided between the door handle 15 on the fire hydrant door 12 and the gas damper 48 on the lift-type door opening/closing mechanism 40, and controls the locked and unlocked states of the gas damper 48 in response to the opening and closing operation of the door handle 15.

When the handle lever 1510 of the door handle 15, which is in the closed position of the fire hydrant door 12 in the closed position, is pulled toward the open position, the gas damper 48 is unlocked by the remote control mechanism 100, and the fire hydrant door 12 can be moved from the closed position in FIG. 5(A) to the fully open position in FIG. 5(B) to open it. When the handle lever 1510 of the door handle 15 is released to the closed position, the gas damper 48 is locked by the remote control mechanism 100, and the movement of the fire hydrant door 12 can be stopped and held in that position.

As shown in FIG. 7, the remote control mechanism 100 connects one end of a wire 106 to a lever arm 102 provided on the door handle 15 of the fire hydrant door 12.

As shown in FIG. 8, when the handle lever 1510 on the front of the door handle 15 is pulled toward you to open the door, the lever arms 102 that protrude from both sides of the back are moved to the position of the lever arms 102a shown by the imaginary lines. Therefore, when the door handle 15 is opened, as shown in FIG. 7, the movement of the lever arms 102 pulls the wire 106 toward the door handle 15 via the rollers 108.

The other end of the wire 106 is inserted through a wire tube 104 supported between the fire hydrant door 12 and the gas damper 48 by fixing members 110, 114, and is connected to the tip of a lever 116 that is rotatably attached to a bracket 112 attached to the tip of the piston rod 80 of the gas damper 48 by an axis 118. The tip of a push rod 86 protruding from inside the piston rod 80 abuts against the lever 116. The wire tube 104 through which the wire 106 is inserted is fixed by the fixing members 110, 114 in a state in which, for example, a mid-way portion is bent so that it can be extended to a predetermined length in response to the movement of the fire hydrant door 12 relative to the housing 11a.

The gas damper 48 supports the bracket 88 on the top of the cylinder 76 on the housing fulcrum 47 shown in FIG. 5, and supports the bracket 112 on the tip of the piston rod 80 extending from the underside of the cylinder 76 on the link fulcrum 49 midway along the first link 42 shown in FIG. 6.

As a result, when the handle lever 1510 of the door handle 15 is pulled toward the open position and the wire 106 is pulled toward the door handle 15, the lever 116 rotates and pushes the push rod 86 toward the piston rod 80, opening the built-in spool valve and enabling the piston rod 80 to freely extend and retract relative to the cylinder 76, creating an unlocked state.

In addition, when the handle lever 1510 of the door handle 15 is released and returned to the closed position, the lever arm 102 returns to the open position, the lever 116 rotates in the opposite direction, and the lever 116 releases the push rod 86 from being pushed down, causing the built-in spool valve to close, and a locked state in which the piston rod 80 is fixed to the cylinder 76 can be achieved.

Now, we will explain the gas damper 48. As shown in Figure 9, a piston 78 is slidably arranged inside a cylinder 76 of the gas damper 48, and a piston rod 80 is integrally provided on one side of the piston 78, with a portion of the piston rod 80 extending outside from the cylinder 76 via a seal 96, a rod guide 98, and a dust seal 99.

A spool valve 82 is disposed inside the piston 78, and the spool valve 82 is capable of opening and closing a flow passage that connects the cylinder chambers on both sides of the piston 78 via an orifice hole 84. In addition, a push rod 86 is disposed through the inside of the piston rod 80 relative to the spool valve 82, and the movement of the push rod 86 allows the spool valve 84 to be opened and closed.

A free piston 90 is placed in the cylinder chamber on the bracket 88 side, and the cylinder chambers on both sides of the piston 78 except for the side of the free piston 90 facing the bracket 88 are filled with oil 92, and the cylinder chamber on the side of the free piston 90 facing the bracket 88 is filled with nitrogen gas 94 at a predetermined pressure.

Next, the operation of the gas damper 48 will be described. Figure 10 (A) shows the initial position (locked state) in which the push rod 86 is not pushed in. In this state, the spool valve 82 closes the flow path that connects the cylinder chambers on both sides of the piston through the orifice hole 84, preventing the piston 78 from moving, and the piston rod 80 is fixed relative to the cylinder 76.

Figure 10 (B) shows the state in which the push rod 86 is pushed in and the spool valve 82 is moved to the open position (unlocked state), in which the cylinder chambers on both sides of the piston communicate through the orifice hole 84, allowing oil 92 to flow and allowing the piston 78 to slide freely. As a result, the piston 78, which is now free to slide, moves due to the pressure of the nitrogen gas 94 filled through the free piston 90, pushing out the piston rod 80.

When the push rod 86 is returned to its initial position (locked state) while the piston 78 is moving, the spool valve 82 again closes the flow path that connects the cylinder chambers on both sides of the piston through the orifice hole 84, as shown in Figure 10 (A), stopping the movement of the piston 78 at that position and fixing the piston rod 80.

Therefore, as shown in FIG. 7, by operating the handle lever 1510 of the door handle 15 to set the push rod 86 of the gas damper 48 to the open position and remotely pushing it in via the wire 106, the gas damper 48 is unlocked and the fire hydrant door 12 is free to move, and the fire hydrant door 12 can be moved to the fully open position. Also, when the handle lever 1510 of the door handle 15 is released to set it to the closed position, the push rod 86 returns to the initial position, locking the gas damper 48 and stopping and holding the fire hydrant door 12 in that position.

For example, when opening the fire hydrant door 12 to remove the nozzle 64 or operate the fire hydrant valve opening/closing lever 68, the fire hydrant door 12 can be opened to a position where the nozzle 64 and the fire hydrant valve opening/closing lever 68 can be operated and then stopped. When connecting a fire hose to a water supply hydrant 52 located above these fire hydrant devices or when operating the pump start switch 74, the fire hydrant door 12 can be moved further upward and then stopped. The fire hydrant door 12 can be opened to the required position depending on the fire hydrant device being handled.

In addition, when it is time to recover after the firefighting activities using the fire hydrant device 10 have been completed, the fire hydrant door 12 can be raised to the fully open position and the door opening 14 can be opened to the maximum extent, making it possible to simply and easily perform recovery work such as rewinding the pulled-out fire hose 60. In addition, when closing the open fire hydrant door 12, the door handle 15 can be pulled forward to unlock the gas damper 48, and then the fire hydrant door 12 can be pushed down.

[c. Fire hydrant device of the second embodiment equipped with a sliding door opening and closing mechanism]
A fire hydrant device having a sliding door opening/closing mechanism according to the second embodiment will be described with respect to a stationary fire hydrant device. In this description, reference is made to FIG. 11, which shows the fire hydrant device of the second embodiment from the front (front side) with the fire hydrant door fully open (fully open position), FIG. 12, which shows the sliding door opening/closing mechanism of the fire hydrant door with the fire hydrant door in a closed position, and FIG. 13, which shows the sliding door opening/closing mechanism of the fire hydrant door with the fire hydrant door in a fully open position. Note that FIG. 12(A) shows a cross section seen from the front, FIG. 12(B) shows a cross section taken along the a-a section line in FIG. 12(A), and FIG. 12(C) shows a cross section taken along the b-b section line in FIG. 12(A). Also, FIG. 13(A) shows a cross section seen from the front, FIG. 13(B) shows a cross section taken along the c-c section line in FIG. 13(A), and FIG. 13(C) shows a cross section taken along the d-d section line in FIG. 13(A).

The fire hydrant door 12 of this embodiment is disposed in the door opening 14 of the first housing 11a, and by actuation of a sliding door opening/closing mechanism 120 provided on both sides of the first housing 11a, the door surface is kept parallel to the front surface of the housing 11a and moves upward, and can be opened to the fully open position as shown in FIG. 11. Note that, apart from the door opening/closing mechanism of the fire hydrant door, the fire hydrant door is basically the same as the fire hydrant device 10 of the first embodiment, and therefore a description thereof will be omitted.

As shown in Figures 12 and 13, the sliding door opening/closing mechanism 120 has a roller 134 journaled on the lower side edge of the fire extinguisher door 12, and a roller guide section 132 arranged inside the side of the housing corresponding to the position of the roller 134 when the fire extinguisher door 12 is in the closed position and the fully open position. The roller guide section 132 has a U-shaped cross section with an open inner surface side facing the fire hydrant door 12 when viewed from above (top), and guides and moves the roller 134 journaled on the lower side edge of the fire hydrant door 12.

The vertical movement distance of the fire hydrant door 12 between the closed position and the fully open position is the distance L from the upper end of the roller 134 to the inner upper end of the roller guide portion 132 when the fire hydrant door 12 is in the closed position.

Gas dampers 122 that function as the drive units for the sliding door opening/closing mechanism 120 are arranged inside both sides of the first housing 11a. The gas dampers 122 are fixed at the bottom of the housing 11b by the housing fixing parts 128 at the bottom end on the cylinder 124 side, and at the top end on the piston rod 126 side to the door fixing parts 130 of the fire hydrant door 12, so that they stand perpendicular to the road surface of the guard passage.

The gas damper 122, like the gas damper 48 of the first embodiment, is provided with a remote control mechanism that controls the locked and unlocked states by opening and closing the door handle 15. The gas damper 122 and its remote control mechanism of this embodiment differ from those of the first embodiment in that the stroke distance of the piston rod 126 is longer than in the first embodiment, but other than that, the configuration and operation are basically the same as those of the first embodiment shown in Figures 7 to 10, so a description thereof will be omitted.

Next, the operation of the sliding door opening/closing mechanism 120 will be described. When the door handle 15, which is in the closed position of the fire hydrant door 12, is pulled toward the open position from the closed position, the gas damper 122 is unlocked by the remote control mechanism, and the fire hydrant door 12 can be moved upward to the fully open position shown in FIG. 13. When the door handle 15 is released to the closed position, the gas damper 122 is locked, and the fire hydrant door 12 can be stopped and held in that position.

For example, when opening the fire hydrant door 12 to remove the nozzle 64 or operate the fire hydrant valve opening/closing lever 68, the fire hydrant door 12 can be opened to a position where the nozzle 64 and the fire hydrant valve opening/closing lever 68 can be operated and then stopped. When connecting a fire hose to a water supply hydrant 52 located above these fire hydrant devices or when operating the pump start switch 74, the fire hydrant door 12 can be moved further upward and then stopped. The fire hydrant door 12 can be opened to the required position depending on the fire hydrant device being handled.

In addition, when it is time to recover after the firefighting activities using the fire hydrant device 10 have been completed, the fire hydrant door 12 can be raised to the fully open position and the door opening 14 can be opened to the maximum extent, making it possible to simply and easily perform recovery work such as rewinding the pulled-out fire hose 60. In addition, when closing the open fire hydrant door 12, the door handle 15 can be pulled forward to unlock the gas damper 122, and the fire hydrant door 12 can then be pushed down.

[d. Recessed fire hydrant system]
Next, a description will be given of the application to a recessed type fire hydrant device that is installed by cutting a box into the tunnel wall along the guard passage.

As with the case of the fire hydrant device that is exposed to the guard passageway described above, the first embodiment with a lift-type door opening/closing mechanism 40 or the second embodiment with a slide-type door opening/closing mechanism 120 can be applied as the door opening/closing mechanism for the fire hydrant door 12 to a recessed type fire hydrant device that is installed by cutting a box out of the tunnel wall.

When any door opening/closing mechanism is used, it is necessary to determine the movement range of the fire hydrant door 12 so that the opened fire hydrant door 12 does not hit the top surface of the boxed-out opening. However, when the lift-type door opening/closing mechanism 40 is used, the fire hydrant door 12 can be opened by moving upward while moving forward. Therefore, when the fire hydrant door 12 moves forward, it is exposed from the boxed-out opening to the guard passage side, and can be moved upward without worrying about hitting the top surface of the opening.

For this reason, even when the sliding door opening/closing mechanism 120 is applied, for example, the roller guide portion 132 and the gas damper 122 are not arranged perpendicular to the installation surface, but are arranged at an angle such that the upper portion is more forward than the lower portion, so that when the fire hydrant door 12 is opened, the fire hydrant door 12 is exposed to the guard passage from the box-cut opening, and the fire hydrant door 12 can be moved upward without worrying about hitting the upper surface of the opening.

[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.

(Door opening and closing mechanism)
In the above embodiments, a lift type door opening/closing mechanism and a slide type door opening/closing mechanism are taken as examples of door opening/closing mechanisms, but the door opening/closing mechanisms are not limited to these and include any door opening/closing mechanism that utilizes, for example, a motor-driven mechanism, a lifting mechanism using a weight, etc.

(Wall-mounted fire hydrant device)
The above embodiment has taken a free-standing fire hydrant device as an example of a fire hydrant device that is exposed to the monitor's passageway, but the first embodiment having a lift-type door opening/closing mechanism 40 or the second embodiment having a slide-type door opening/closing mechanism 120 can also be applied to a wall-mounted fire hydrant device as the door opening mechanism for the fire hydrant door 12.

(Housing of fire hydrant device)
In the above embodiment, the electrical equipment is disposed in the second housing and the fire extinguisher is housed in the third housing, but the second housing and the third housing may be integrated into a single housing.

(If the tunnel wall has a cross section other than a circular one)
In the above embodiment, the tunnel cross-sectional shape is circular. However, if the tunnel cross-section is other than circular, such as a tricentric circle, the present invention can be applied by taking the horizontal line at the point where the horizontal width of the tunnel cross-sectional shape is the widest as the tunnel center line SL1 in the above explanation.

(Fire hydrant structure compatible with slimming)
In the fire hydrant device in the above embodiment, the width (left-right direction) of the first housing and the second housing is increased to accommodate the reduction in thickness of the fire hydrant device, thereby ensuring the internal volume that is reduced by the reduction in thickness; however, the vertical width (top-bottom direction) of the first housing and the second housing may also be increased to ensure the internal volume that is reduced by the reduction in thickness.

(others)
Furthermore, the present invention includes appropriate modifications that do not impair the objects and advantages of the present invention, and is not limited to the numerical values shown in the above embodiment.

10: Fire hydrant device 11a: First housing 11b: Second housing 11c: Third housing 12: Fire hydrant door 13a, 13b, 13c: Decorative frame 14: Door opening 15: Door handle 1510: Handle lever 16: Fire extinguisher door 17: Viewing window 18: Electrical door 20: Auxiliary door 22: Red indicator light 24: Transmitter 25: Response lamp 26a, 26b: Terminal box 27: Tunnel wall 28: Telephone jack 3 0: Stand 35: Guard passage 36: Road 38: Fire extinguisher 40: Lift-type door opening/closing mechanism 41, 45: Door fulcrum 42: First link 43, 46, 47: Housing fulcrum 44: Second link 48, 122: Gas damper 49: Link fulcrum 50a: Valve storage section 50b: Hose storage section 51: Water supply pipe 52: Water supply hydrant 54: Fire hydrant valve 60: Fire hose 62: Hose storage frame 6 3: Hose outlet 64: Nozzle 65: Nozzle holder 66: Hose guide 68: Fire hydrant valve opening/closing lever 70: Operation box 72: Pump start interlocking switch 74: Pump start switch 76, 124: Cylinder 78: Piston 80, 126: Piston rod 82: Spool valve 84: Orifice hole 86: Push rod 88, 112: Bracket 90: Free piston 92: Oil 94: Nitrogen gas 96: Seal 98: Rod guide 99: Dust seal 100: Remote control mechanism 102: Lever arm 104: Wire tube 106: Wire 108, 134: Roller 110, 114: Fixing member 116: Lever 118: Shaft 120: Sliding door opening/closing mechanism 128: Housing fixing part 130: Door fixing part 132: Roller guide part

Claims (7)

A fire hydrant device installed on a tunnel wall or a guard passage provided along the tunnel wall,
A fire hydrant door disposed at a door opening on the front surface of the fire hydrant device;
A door opening/closing mechanism that moves the fire hydrant door above the door opening while maintaining a parallel state between the door surface of the fire hydrant door and the front surface of the fire hydrant device, and opens the fire hydrant door;
A fire hydrant device comprising:
The fire hydrant device according to claim 1,
A fire hydrant device characterized in that the door opening and closing mechanism opens the fire hydrant door by moving it upward while moving it forward.
The fire hydrant device according to claim 1,
The door opening and closing mechanism includes:
A parallel link mechanism that moves the fire hydrant door upward while maintaining a parallel state between the door surface of the fire hydrant door and the front surface of the fire hydrant device;
A drive unit that operates the parallel link mechanism by extension when the door operating unit of the fire hydrant door is operated to open, and moves the fire hydrant door upward;
A fire hydrant device comprising:
The fire hydrant device according to claim 1,
The door opening and closing mechanism includes:
guide portions disposed corresponding to both side portions of the door opening;
A roller portion is disposed on both sides of the fire hydrant door and moves along the guide portion to move the fire hydrant door in the up and down direction;
A drive unit that operates to guide and move the roller unit along the guide unit by extension when the door operation unit of the fire hydrant door is operated to open, thereby moving the fire hydrant door upward;
A fire hydrant device comprising:
The fire hydrant device according to claim 3 or 4,
The fire hydrant apparatus is characterized in that the drive unit extends when the door operating unit is operated to be open and in the open position, and stops extending when the door operating unit is not operated and in the closed position, thereby holding the fire hydrant door in the stopped position.
The fire hydrant device according to claim 1,
The fire hydrant device is installed on a stand that is placed on the road surface of the monitor passage so that it is at a predetermined height above the road surface of the monitor passage and is close to or abutting the tunnel wall surface.
The fire hydrant device according to claim 2,
The fire hydrant device is characterized in that it is embedded and installed in an opening formed by cutting a box out of the tunnel wall.

Images