JP7085607B2 - Fire hydrant device and fire hydrant equipment - Google Patents

Description

The present invention relates to a fire hydrant device and a fire hydrant facility that pull out a hose with a nozzle to release fire extinguishing water or fire extinguishing foam.

Conventionally, a fire hydrant device has been installed as a tunnel emergency facility installed in a tunnel such as a highway or a motorway. Contains valves including.

The fire hydrant device is generally installed by being embedded in the tunnel wall surface along the tunnel side wall at intervals of, for example, 50 meters. In the event of a vehicle accident involving a fire, in a tunnel with a guard passage, road users such as the driver of the accident vehicle climb the guard passage by using steps installed on the side of the guard passage and tunnel. The fire hydrant door of the fire hydrant device installed on the wall is opened forward and the hose with a nozzle is taken out to extinguish the fire.

The observer passage is provided as a side wall passage that is raised above the road surface, and it is possible to inspect various equipment including the fire hydrant device installed in the tunnel safely without obstructing the passage of vehicles in the tunnel. ..

Also, in a tunnel without a guard passage, users such as the driver of the accident vehicle approach the fire hydrant device installed on the tunnel wall surface, and similarly, open the fire hydrant door forward and hose with a nozzle. I take it out and try to extinguish the fire.

Japanese Unexamined Patent Publication No. 2006-181057 Japanese Unexamined Patent Publication No. 2008-055024 Japanese Unexamined Patent Publication No. 2009-285126 Japanese Unexamined Patent Publication No. 2006-181057 Japanese Unexamined Patent Publication No. 2001-238976

By the way, in an urban tunnel made by a shield method or the like, the fire hydrant device cannot be embedded and installed in the tunnel wall surface, and it is necessary to embed and install the fire hydrant device in the side surface (wall surface) of the observer passage.

However, when a fire hydrant device that opens the door forward like a conventional fire hydrant is installed in the observer passage, there is a problem that when the fire hydrant door is opened, it exceeds the building limit and jumps out to the road side.

In order to solve this problem, the applicant of the present application installs a fire hydrant storage box embedded in the observer passage, provides a front door that slides open and closes facing the road side, and opens and closes upward on the observer passage surface. We are studying a fire hydrant storage box with a structure equipped with an upper door.

According to the fire hydrant storage box embedded in the observer passage in this way, when a fire occurs due to a vehicle accident, the user can easily and easily nozzle from the hose storage part by opening the front door facing the road. You can extinguish the fire by pulling out the attached hose. If the vehicle stops in front of the fire hydrant device and cannot be operated from the front door, open the upper door of the observer passage and pull out the hose with nozzle to extinguish the fire without being disturbed by the stopped vehicle. It can be carried out.

By the way, it is possible to extinguish a fire by pulling out a hose with a nozzle by opening the upper door from the road surface side of the observer passage, but in order to open the upper door, it is necessary to bend down and work, which is heavy. The problem is that opening the door increases the work load for the user.

In addition, it is equipped with an upper door and a front door to handle from the road side and the road surface side of the observer passage, and the door to be opened differs depending on the operation location, so it is more difficult for the user to handle the fire hydrant device than before. Being also a problem.

The present invention provides a fire hydrant device and a fire hydrant facility that make it possible to easily handle the fire hydrant device from the road side and the road surface side of the observer passage, and easily open the upper door when handling the fire hydrant device. The purpose.

(Fire hydrant device)
The present invention
A housing that is embedded in the guard passage along the tunnel wall and houses a hose with a nozzle,
The front door, which is arranged so that the front door opening provided on the front of the housing on the road side in the installed state can be opened and closed,
In the installed state, the upper door opening provided on the upper surface of the housing on the road surface side of the observer passage is arranged so as to be openable and closable , and the front opening and the tunnel wall surface are opened by rotating from the road side toward the tunnel wall surface side. The upper door that can be opened after turning from the side to the road side and opening
It is a fire hydrant device equipped with
Further , it is characterized by being provided with an upper door assist mechanism for encouraging the movement of opening the upper door to the front opening and / or the rear opening .

( Opening mechanism of fire hydrant device )
In addition,
The first opening operation unit where the operation for opening the upper door to the rear opening is performed, and
The second opening operation unit, which is operated to open the upper door to the front opening ,
The first opening mechanism, which is operated by the first opening operation unit to open the upper door to the rear opening,
The second opening mechanism, which is operated by the second opening operation unit to open the upper door to the front opening,
Equipped with
The second opening mechanism holds the front door together with the upper door when the upper door is in the closed position, and operates the upper door and the front door when the second opening operation unit is operated when the upper door is in the closed position. The front door can be opened and the upper door can be opened to the front.

( Fire hydrant device 2 )
In another embodiment of the invention,
A housing that is embedded in the guard passage along the tunnel wall and houses a hose with a nozzle,
The front door, which is arranged so that the front door opening provided on the front of the housing on the road side in the installed state can be opened and closed,
In the installed state, the upper door opening provided on the upper surface of the housing on the road surface side of the observer passage is arranged so as to be openable and closable , and is integrally rotated with the second upper door from the tunnel wall surface side toward the road side to open. The first upper door that can be opened after opening ,
The second upper door opening provided on the upper surface of the first upper door on the road surface side of the observer passage can be opened and closed freely, and can be opened by rotating from the road side toward the tunnel wall surface side. The second upper door, which is
It is a fire hydrant device equipped with
Further, a first upper door assist mechanism that urges the movement to open the first upper door to the rear opening integrally with the second upper door , and a second that urges the movement to open the second upper door to the front opening. Equipped with an upper door assist mechanism.

( Opening mechanism of fire hydrant device 2 )
The first opening operation unit, which is operated to open the first upper door to the rear opening integrally with the second upper door,
The second opening operation unit, in which the operation for opening the second upper door to the front opening is performed,
A first opening mechanism that is operated by the first opening operation unit to open the first upper door to the rear opening integrally with the second upper door.
A second opening mechanism that is operated by the second opening operation unit to open the second upper door forward.
Equipped with
The second opening mechanism holds the front door together with the second upper door when the second upper door is in the closed position, and operates the second opening operation unit when the second upper door is in the closed position. , The holding of the second upper door and the front door is released so that the front door can be opened and the second upper door can be opened to the front .

( Fire hydrant equipment )
In another embodiment of the invention,
A housing that is embedded in the guard passage along the tunnel wall and houses a hose with a nozzle,
The front door, which is arranged so that the front door opening provided on the front of the housing on the road side can be opened and closed,
The upper door opening provided on the upper surface of the housing on the road surface side of the observer passage is arranged to be openable and closable, and the front opening that rotates and opens from the road side toward the tunnel wall surface side and from the tunnel wall surface side to the road side. The upper door that can be opened after turning toward and opening,
It is a fire hydrant facility equipped with a fire hydrant device provided with
The fire hydrant device is characterized by comprising an upper door assist mechanism for encouraging the movement of opening the upper door to the front opening and / or the rear opening.

(Fire hydrant equipment 2 )
In another embodiment of the invention,
A housing that is embedded in the guard passage along the tunnel wall and houses a hose with a nozzle,
The front door, which is arranged so that the front door opening provided on the front of the housing on the road side can be opened and closed,
The upper door opening provided on the upper surface of the housing on the road surface side of the observer passage is arranged to be openable and closable , and is opened after rotating from the tunnel wall surface side toward the road side integrally with the second upper door. The first upper door that can be opened to
The second upper door opening provided on the upper surface of the first upper door on the road surface side of the observer passage can be opened and closed freely, and can be opened by rotating from the road side toward the tunnel wall surface side. The second upper door , which is
It is a fire hydrant facility equipped with a fire hydrant device provided with
The fire hydrant device urges the first upper door assist mechanism that urges the movement to open the first upper door to the rear opening integrally with the second upper door, and / or the movement to open the second upper door to the front opening. It is characterized by having an upper door assist mechanism.

Since the other features of the fire hydrant equipment of the present invention are basically the same as those of the above-mentioned fire hydrant device, the description thereof will be omitted.

(Effect of fire hydrant device)
INDUSTRIAL APPLICABILITY According to the present invention, a housing that is embedded in an observer passage along a tunnel wall surface and houses a hose with a nozzle and a front door opening provided on the front surface of the housing that is on the road side in the installed state can be opened and closed. The front door arranged in, the upper door arranged so that the upper door opening provided on the upper surface of the housing on the side of the observer passage surface can be opened and closed, and the opening mechanism operated by the opening operation unit to open the upper door. In the fire extinguishing plug device provided with, the opening mechanism holds the front door together with the upper door in the closed position when the upper door is in the closed position, and the opening operation unit when the upper door is in the closed position. When the operation is performed, the holding of the upper door and the front door is released so that the front door can be opened and the upper door can be opened. Furthermore, the opening mechanism urges the movement to open the upper door. Since the assist mechanism is provided, the user can easily and easily open the front door and the upper door by operating one opening operation unit common to the front door and the upper door, and the front door opening of the housing and the opening of the upper door and the upper door. The upper door opening can be opened, and a hose with a nozzle can be pulled out from the housing to extinguish the fire. In addition, the upper door assist mechanism allows the upper door to be easily opened with a light force.

(Effect of the upper door that can be opened to open front and back)
INDUSTRIAL APPLICABILITY According to the present invention, a housing that is embedded in an observer passage along a tunnel wall surface and houses a hose with a nozzle and a front door opening provided on the front surface of the housing that is on the road side in the installed state can be opened and closed. The front door arranged in, the upper door arranged so that the upper door opening provided on the upper surface of the housing on the side of the observer passage surface can be opened and closed, and the opening mechanism operated by the opening operation unit to open the upper door. In the fire extinguishing plug device provided with, the opening mechanism holds the front door together with the upper door in the closed position when the upper door is in the closed position, and the opening operation unit when the upper door is in the closed position. When the operation is performed, the holding of the upper door and the front door is released so that the front door can be opened and the upper door can be opened. Furthermore, the opening mechanism urges the movement to open the upper door. Since the assist mechanism is provided, the user can open the front door facing the road and open the upper door by operating the second opening operation unit, for example, the front opening handle from the road side. The front door opening and the top door opening of the housing are opened, and the hose with a nozzle can be easily and easily pulled out from the housing to extinguish the fire. In addition, the upper door assist mechanism allows the upper door to be easily opened with a light force.

In addition, when the vehicle stops in front of the fire hydrant device and the user cannot operate from the road side, the user climbs the observer passage and bends down to be the first opening operation unit, for example, a rear opening handle. The upper door opening is opened by opening the upper door to the road side without opening the front door facing the road by the operation of, and it is easy and easy from the housing without being disturbed by the stopped vehicle. A hose with a nozzle can be pulled out to extinguish the fire. Even in this case, the upper door assist mechanism can easily open the upper door with a light force.

Further, even in the upper door structure composed of the first upper door and the second upper door, the same effect as the effect of the upper door that can be opened for front opening and rear opening is produced.

(Effect of the structure of the upper door assist mechanism)
Further, the upper door assist mechanism urges the movement of rotatably supporting one end of the two-bar link arm to the housing by the first support shaft and opening the other end rotatably by the second support shaft. The upper door assist mechanism is provided because the first support shaft is provided with an urging member that supports the back of the door and urges the movement to open the two-bar link arm so that it rotates in the opening direction of the door. Can be installed in a small space inside the door and inside the housing of the hinge that supports the upper door so that it can be opened and closed, and there is almost no restriction on the storage space inside the housing.

(Effect of upper door assist mechanism and upper door weight)
In addition, the force that urges the movement to open the door of the upper door assist mechanism is larger than the force in the closing direction due to the weight of the door that urges the opening movement, so the holding of the upper door is performed by operating the opening operation unit. When released, the urging force of the upper door assist mechanism can overcome the weight of the door and automatically open the upper door.

Since the effect of the in-tunnel fire hydrant equipment of the present invention is the same as that of the above-mentioned in-tunnel fire hydrant device, the description thereof will be omitted.

Explanatory drawing showing tunnel emergency equipment including fire hydrant equipment installed in the tunnel of a motorway Explanatory drawing showing the appearance of the fire hydrant storage box in normal times Explanatory drawing showing the appearance of the fire hydrant storage box of FIG. 2 from the front and the plane. Explanatory view showing the appearance of the fire hydrant storage box of FIG. 2 from the side. Explanatory drawing showing the part of the front opening handle of the fire hydrant storage box provided with the front opening mechanism. Explanatory drawing showing the mechanical structure of the front opening mechanism that opens the second upper door forward and slides open by dropping the front door. Explanatory drawing showing the internal structure of the fire hydrant storage box Explanatory drawing showing the opening operation of the front door and the second upper door when operating from the road side Explanatory drawing showing the assist mechanism provided on the back side of the front door Explanatory drawing showing by taking out the gas spring and the damper provided in the assist mechanism of FIG. The graph which showed the load change of the gas spring with respect to the stroke of the front door in the embodiment of FIG. Explanatory drawing showing another embodiment of the assist mechanism of the front door composed only of a gas spring. An explanatory diagram showing the opening operation of the first upper door when operating from the guard passage side. Explanatory drawing showing the upper door assist stay mechanism provided in the first upper door

[Overview of emergency tunnel equipment]
FIG. 1 is an explanatory diagram showing tunnel emergency equipment including a fire hydrant equipment installed in a tunnel of a motorway. As shown in FIG. 1, the inside of the tunnel 10 constructed by the shield method is covered with a cylindrical tunnel wall surface 12, and a road 15 is provided by being partitioned by a floor slab 18, and in this example, the road 15 is provided. Road 15 has two lanes in one direction.

An observer passage 14 is provided along the tunnel wall surface 12 on the left side of the road 15 partitioned by the deck 18, and the internal space below the observer passage 14 is used as a duct 22 and conduits and the like are laid. .. The guard passage 14 has a size of, for example, 90 cm in height and 70 cm in width.

The lower side of the floor slab 18 on which the road 15 is formed is divided into a plurality of sections in the lateral direction of the tunnel. For example, the section located under the observer passage 14 is used as the management passage 20 and also. The management passage 20 is used as an emergency evacuation passage in the event of a fire in the tunnel. A water supply main 24 is laid in the management passage 20.

Fire hydrant equipment 16 is installed every 50 meters in the longitudinal direction of the tunnel 10, and the fire hydrant device of the fire hydrant equipment 16 is separately installed in the fire hydrant storage box 30 in which the hose is stored and the water discharge control mechanism storage unit 26. ..

The fire hydrant storage box 30 is arranged in a fire hydrant embedding portion that is hollowed out in a box shape over the road surface of the observer passage 14 and the wall surface on the road 15 side. The water discharge control mechanism storage unit 26 is arranged in a management passage 20 below the fire hydrant storage box 30, a branch pipe 24a branched from the water supply main 24 is drawn in, and fire extinguishing water is supplied to the fire hydrant storage box 30. The water supply pipe 25 is set up.

[Fire hydrant equipment]
FIG. 2 is an explanatory view showing the appearance of the fire hydrant storage box in normal times, FIG. 3 is an explanatory view showing the appearance of the fire hydrant storage box of FIG. 2 from the front and a plane, and FIG. 4 shows the appearance of the fire hydrant storage box of FIG. It is explanatory drawing shown from the side.

(Exterior structure of fire hydrant storage box)
As shown in FIGS. 2 to 4, the fire hydrant storage box 30 of the fire hydrant equipment 16 is embedded and installed in the internal space under the road surface of the observer passage 14. In the fire hydrant storage box 30, the front door 32 is slidably arranged in the vertical direction in the front door opening 33 formed on the upper side of the center of the front surface of the housing 31.

Further, a first upper door 34 having the same width as the front door 32 is arranged in the first upper door opening 35 formed in the center of the upper surface of the observer passage 14 of the fire hydrant storage box 30 on the road surface side. Further, a second upper door opening 37 is formed in the center of the front side of the first upper door 34, and the second upper door 36 is arranged here.

The first upper door 34 is axially supported on both sides of the front edge of the door by an arcuate hinge 46 arranged at the front edge corner portion of the upper part of the housing 31, as shown in the first upper door 34a of FIG. The hinge 46 can be rotated to allow a rear opening that opens upward.

The rear edge of the second upper door 36 is pivotally supported by a hinge 42 at the second upper door opening 37 of the first upper door 34, and as shown in the second upper door 36a of FIG. 4, the hinge 42 is the center. The front opening that opens upward is possible.

A front opening handle 38 is pivotally supported on the front edge of the second upper door 36 by a hinge 44, and the front opening mechanism provided on the handle body of the front opening handle 38 allows the second upper door 36 to be closed. When the front door 32 is locked in the closed state shown in the figure and the user operates from the road 15 side, when the front opening handle 38 is opened, the front door 32 is locked to the second upper door 36. The front door 32 is released, and the front door 32 falls to the back side of the housing 31 due to its own weight to open the front door opening 33, and by opening the first upper door 36 forward, the second upper door opening of the fire extinguisher storage box 30 is opened. Open 37.

On the back side of the front door 32, as will be clarified later, an assist mechanism provided with a gas spring and a damper is provided.

Here, the hinge 46 that rotatably supports the first upper door 34 to the front edge corner portion of the housing 31, and the hinge 44 that pivotally supports the front opening handle 38 to the front edge of the second upper door 36. The axis core lines of both are arranged to be coaxial, and the front opening handle 38 that locks the housing 31 and the front door 32 to the closed position is the fixed side, and the second upper door is provided by the hinges 44 and 46. Together with 36, the first upper door 34 is pivotally supported so as to open rearward.

A notification device panel 48 is provided at the upper left portion of the front surface of the fire hydrant storage box 30. The reporting device panel 48 is provided with a red indicator lamp 50, a transmitter 52, a response lamp 54, and a telephone jack 55. The red indicator light 50 is always lit so that the installation location of the fire hydrant equipment can be seen from a distance. In the event of a fire, when the transmitter 52 is pressed and the push button switch is turned on, the transmission signal is transmitted to the disaster prevention receiver installed in the monitoring center of the monitoring room, etc., and a fire alarm is issued. The response lamp 54 is turned on, and the red indicator lamp 50 is further blinked.

[Front opening mechanism]
5A and 5B are explanatory views showing the front opening handle portion of the fire hydrant storage box provided with the front opening mechanism taken out, FIG. 5A is a front view, and FIG. 5B is FIG. 5A. The side surface seen from XX of is shown. 6A and 6B are explanatory views showing a mechanical structure of a front opening mechanism that opens the second upper door forward and slides open by dropping the front door. FIG. 6A shows a closed state, and FIG. 6B shows a closed state. Indicates the state in which the front opening handle is opened.

As shown in FIG. 5, the shafts of the front opening mechanism are on both sides of the handle body 38a of the front opening handle 38 pivotally supported by the hinge 44 at the tip of the second upper door 36 arranged on the upper surface of the fire extinguishing plug storage box 30. The member 56 is taken out, and the tip of the shaft member 56 is inserted into the shaft hole of the bearing member 58 arranged on the back side of the front door 32 in the closed state of the second upper door 36, whereby the second upper door is inserted. The front door 32 is locked to 36 and is held in the closed position.

When the front opening handle 38 is lifted up, the shaft member 56 is pulled inward and comes out of the shaft hole of the bearing member 58 to release the lock of the front door 32, and the front door 32 slides and falls due to its own weight. The front door opening 33 is opened.

As shown in FIG. 6A, in the front opening mechanism 60, one end of a pair of bent links 62 is connected by a moving fulcrum 64 in the handle main body 38a, and the bent position of the link 62 is a handle as a rotation fulcrum 66. It is fixed to the main body 38a side, the other end of the link 62 is connected to the fulcrum 68 at the shaft end of the shaft member 56 as a slide fulcrum 70, and the moving fulcrum 64 is further urged upward in the figure by the spring 72. ing.

When the front opening handle 38 is not operated, the link 62 is rotated outward by receiving the force of the spring 72, so that the shaft member 56 is fitted into the shaft hole 58a of the bearing member 58, and the second upper door 36 is used. The front door 32 is locked.

When the front door 38 is lifted up, as shown in FIG. 6 (B), the moving fulcrum 64 moves downward against the spring 72 via a link mechanism (not shown), whereby the link 62 turns inward. By moving and pulling the shaft member 56 inward, the tip of the shaft member 56 is pulled out from the shaft hole 58a of the bearing member 58, the front door 32 is unlocked, and the front door 32 slides and falls due to its own weight. Then, the front door opening 33 is opened.

The front opening mechanism 60 is not limited to the link mechanism shown in FIG. 6, and includes an appropriate link mechanism that pulls the shaft member 56 inward by lifting up the front opening handle 32 and pulls it out from the shaft hole 58a of the bearing member 58. ..

[Internal structure of fire hydrant storage box]
7 is an explanatory view showing the internal structure of the fire hydrant storage box, FIG. 7A shows the front surface, and FIG. 7B shows the side surface seen from the YY cross section of FIG. 7A.

As shown in FIG. 7, the inner lower side of the housing 31 in the fire hydrant storage box 30 is a hose storage portion 74, and the hose 76 having a shape-retaining structure is horizontally stacked and internally wound.

Since the rectangle seen from the plane of the housing 31 has a width of about 1.4 meters and a depth of about 0.35 meters, when the hose 76 is internally wound around the hose storage portion 74, the hose 76 is internally wound. The shape is a rounded rectangle consisting of two parallel lines and two semicircles, and the length of one turn of the hose 76 internally wound inside the flat rectangular housing 31 is about 3.5 meters, and the hose length is about 3.5 meters. Since it requires 30 meters or more, the hose 76 may be wound inward by stacking it for 9 turns or more.

Here, the hose 76 internally wound in a rectangular shape with rounded corners in the housing 31 is shown by the parallel wire hose portions 76a and 76c and the semicircular hose portions 76b and 76d.

A hose guide structure 80 is provided on the central front surface side of the housing 31 to inwardly deform the parallel wire hose portion 76a on the front surface side of the hose 76 that is internally wound in a rectangular shape with rounded corners.

In the hose guide structure 80, four guide pipes 80a, 80b, 80c, 80d using metal pipes are erected on the bottom plate 81, and the guide pipes 80a, 80d at both ends are erected along the inner surface of the housing 31. The central guide pipes 80b, 80c are separated from each other by a predetermined length, and the hose 76 is wound inward along the guide pipes 80a, 80b, 80c, 80d of the hose guide structure 80, so that the hose 76 is on the front side of the hose 76. The parallel wire hose portion 76a is deformed inward to form a shape close to a gourd shape, and due to this deformation, a repulsive force that tries to spread outward is generated in the deformed parallel wire hose portion 76a of the hose 76.

By providing such a hose guide structure 80, in the hose 76 that is vertically wound in the housing 31, the parallel wire hose portion 76a having rounded corners is deformed inward by the hose guide structure 80. As a result, a repulsive force that tries to spread outward is generated, and a force that presses against the inner wall side of the housing 31 is generated, so that even if the parallel wire hose portions 76a and 76c of the hose 76 that are repeatedly wound inward become long. It is possible to surely prevent it from collapsing inward.

Here, in the hose guide structure 80, the parallel wire hose portion 76a on the front side of the hose 76 is deformed inward, and the parallel hose portion 76c on the back side is not deformed inward, but is deformed inward of the parallel wire hose portion 76a. As a result, the force that tends to spread outward as a whole of the hose 76 increases, and it is possible to reliably prevent the parallel hose portion 76c on the back surface side that has not been deformed inward from collapsing inward.

Further, when the front door 32 and the second upper door 36 or the first upper door 34 are opened and the hose 76 is pulled out to the outside, the hose due to the deformation of the semicircular hose portions 76b and 76d of the hose 76 is pushed out. In addition to the force, the parallel wire hose portion 76a of the hose 76 is also deformed inward by the hose guide structure 80 to generate a force to push out the hose 76, so that the pulling force of the hose 76 can be reduced.

At the upper part of the hose guide structure 80, guide pipes 82a to 82c and a guide pipe so as to surround the inside of the front door opening 33, the first upper surface door opening 35, and the second upper surface door opening 37 shown in FIGS. 1 and 2. 84a to 84c are arranged, and when the hose 76 is pulled out to the outside, the hose 76 is slidably contacted with the guide pipes 82a to 82c or the guide pipes 84a to 84c to prevent the hose 76 from being worn and reduce the hose pulling force.

Further, a bubble nozzle 78 connected to the tip of the hose 76 by a nozzle holder 86 is detachably locked on the back surface of the second upper door 36. The nozzle holder 86 of the present embodiment is locked by a suspension structure in which the foam nozzle 78 is pivotally supported on the back surface of the second upper door 36 and suspended in a suspended state, and the second upper door 36 is locked by the second upper door 36 in FIG. When the first upper door 34 is opened forward as shown in the upper door 36a, or when the first upper door 34 is integrally opened with the second upper door 36 as shown in the first upper door 34a of FIG. 4, the second upper door 34 is also opened. A nozzle holder 86 is locked to the back surface of the door 36 in a state where the foam nozzle 78 is suspended.

Therefore, when the second upper door 36 is opened forward or the first upper door 34 is opened rearward together with the second upper door 36, the foam nozzle 78 held in a suspended state on the back surface of the door appears at the upper part of the fire hydrant storage box 30. become.

The position where the bubble nozzle 78 held on the back surface of the door by opening the front of the second upper door 36 appears is in the range of approximately 0.9 to 1.3 meters from the road 15, which stands on the road surface 15. Since the bubble nozzle 78 appears in front of the user, which corresponds to the range from the waist to the shoulder of the user, the bubble nozzle 78 can be easily taken out.

Further, the position where the bubble nozzle 78 held on the back surface of the door when the first upper door 34 is opened rearward appears is in a range of approximately 0.2 to 0.4 meters from the road surface of the observer passage 14, and is monitored. The bubble nozzle 78 appears in front of the user who bends down in the member passage 14 and operates the rear opening handle 40, and the user can easily take out the bubble nozzle 78 from the observer passage 14 side. ..

Further, an operation box is arranged inside the right side of the upper surface opening of the housing 31, a fire hydrant valve opening / closing lever is provided in the operation box, and a manual pilot valve provided inside the operation box is opened / closed. However, the illustration is omitted. When the fire hydrant valve open / close lever is opened, the manual pilot valve is opened, and the fire hydrant valve separately arranged in the water discharge control mechanism storage unit 26 shown in FIG. 1 can be remotely opened.

Further, one or more of the operation box, the manual pilot valve, and the fire hydrant opening / closing lever may be arranged in the empty space secured by the hose guide structure 80. Further, a connection member between the manual pilot valve and the fire hydrant opening / closing lever and a part of the piping from the manual pilot valve to the fire hydrant valve may be arranged in an empty space.

By arranging appropriate members in the empty space as described above, it is possible to effectively utilize the space of the fire hydrant storage box arranged in the guard passage where the space is limited.

[Operation to open the second upper door and front door from the road side]
FIG. 8 is an explanatory diagram showing an opening operation of the front door and the second upper door when operating from the road side.

As shown in FIG. 8, when the user operates the fire hydrant storage box 30 from the road side, when the front opening handle 38 is lifted up, the front door 32 is unlocked and the front door 32 slides due to its own weight. It falls and the front door opening 33 is opened. At this time, the front door 32 absorbs the impact when it is opened and dropped by the assist mechanism arranged on the back side thereof.

Subsequently, when the user performs a front opening operation of opening the second upper door 36 in the depth direction, the shaft members 56 arranged on both sides of the handle main body 38a are arranged as shown in FIGS. 6A and 6B. Is extracted from the bearing member 58 on the back surface of the front door 32, the second upper door 36 is opened forward about the hinge 42, and the second upper door opening 37 is opened.

At this time, as shown in FIG. 7A, the nozzle holder 86 arranged on the back side of the second upper door 36 is located in front of the user on the road and is locked to the nozzle holder 86. The foam nozzle 78 appears in front of the user, and the foam nozzle 78 can be easily taken out and the hose 76 can be pulled out.

On the other hand, when the fire extinguishing work is completed, after draining the drained hose 76, the hose 76 is rewound in the housing 31 as shown in FIG. 7, and finally, the second upper door 36 is completed. In the closed state, the open front door 32 is pulled up and locked to the handle body 38a of the front opening handle 38 of the second upper door 36 to hold the front door 32 in the closed state.

When the front door 32 is pulled up and closed in this way, the pushing force is applied to the front door 32 by the assist mechanism arranged on the back side thereof, so that the front door 32 is pulled up and closed with a light force. Can be done.

[Front door assist mechanism]
9A and 9B are explanatory views showing the assist mechanism provided on the back side of the front door from the back side of the door. FIG. 9A shows the closed state of the front door, and FIG. 9B shows the open state of the front door. It is shown and a plane is shown in FIG. 9 (C). Further, FIG. 10 is an explanatory view showing the gas spring and the damper provided in the assist mechanism of FIG. 9 taken out, and FIG. 11 is a graph showing the load change of the gas spring with respect to the stroke of the front door in the embodiment of FIG. be.

(Structure of assist mechanism)
As shown in FIG. 9, the front door 32 provided on the front surface of the housing 31 is slidable in the vertical direction along a guide groove formed between the guide members 88 on both sides and the front frame of the housing 31. It is fitted in. On the back side of the front door 32, a damper 92 constituting a shock absorbing mechanism and a gas spring 90 constituting an ascending urging mechanism are arranged as assist mechanisms.

As shown in FIG. 10, the gas spring 90 is provided with a rod 90b stretchably provided in a cylindrical main body 90a in which pressurized gas and oil are stored, and an orifice hole housed in the main body 90a is used as a piston. The lower ends of the rod 90b are connected to each other, and a pushing force is applied to the rod 90b via the piston.

The connecting member 90c at the lower end of the main body 90a of the gas spring 90 is fixed to the housing support member 96 at the overhanging portion of the front bottom of the housing 31, and the tip of the rod 90b taken out from the upper part of the main body 90a is It is connected to a door connecting member 98 fixed to the back surface of the front door 32.

In the damper 92, a rod 92b is flexibly provided in a cylindrical main body 92a, and a piston having an orifice hole and a check valve is slidably incorporated in the main body 92a, and the lower end of the rod 92b is inserted. It is fixed to the piston, and the main body 92a is filled with oil. Further, the connecting member 92c at the lower end of the main body 92a of the damper 92 is fixed to the housing support member 96 at the overhanging portion of the front bottom of the housing 31, and the tip of the rod 92b taken out from the upper part of the main body 92a is , It is connected to the door connecting member 98 fixed to the back surface of the front door 32.

Therefore, when the rod 92b descends, oil moves through the orifice hole of the piston, a damping force proportional to the descending speed of the piston is generated, and the descending speed of the front door 32 is reduced, so that the front door 32 becomes a door. The impact when the fall stops to the stopper 94 is suppressed.

On the other hand, with respect to the movement of the piston when the front door 32 is pulled up and opened, the check valve of the piston opens and the oil moves without resistance, so that it is in a substantially free state and can be pulled up with a light force.

As shown in the plane of FIG. 9C, the gas spring 90 and the damper 92 provide an empty space 95 formed by the guide pipe 84d and the hose guide structure 80 shown in FIG. 7 behind the center of the front door 32. The assist mechanism of the front door 32 can be installed in the housing 31 without newly securing a space for providing the assist mechanism.

(Load setting for gas spring and damper)
As shown in FIG. 11, the gas spring 90 has a push-up load of Ws2 when the front door 32 is held in the fully closed position and the stroke of the rod 90b reaches the maximum stroke Lmax, and the front door 32 is fully opened and the rod is fully opened. Assuming that the push-up load when the stroke L of the 90b becomes L = 0 is Ws1, the push-up load applied to the front door 32 increases in proportion to the decrease in the stroke of the rod 90b, as shown in the straight line 100.

In particular, as shown in the straight line 100, the gas spring 90 has a small change in the push-up load with respect to the stroke L (the spring constant is small), and the push-up load (push-up force) applied when the front door 32 is slid open and closed is small. There is a feature.

Here, assuming that the front door load corresponding to the weight of the front door 32 is Wo, the front door 32 slides up and down, so that the rod 90b of the gas spring 90 always has a constant front with respect to a change in the stroke L. Door load Wo is added.

With respect to this front door load Wo, the push-up load Ws1 is set so that the push-up load Ws1 of the gas spring 90 when the stroke L = 0 when the front door 32 slides down to the fully open position is lowered by a predetermined load. For example, assuming that the front door load Wo = 10 (Kg), the push-up load Ws1 when the stroke L = 0 is set to 9 (Kg). Further, the push-up load Ws2 of the gas spring 90 when the stroke L = Lmax when the front door 32 slides up to the fully closed position is set to, for example, 8 (Kg).

From such a load setting of the gas spring 90, the load in the push-up direction applied to the front door 32 by the gas spring 90 becomes a characteristic of the straight line 100 with respect to the change of the stroke.

The action when the front door is slid open and closed by such an assist mechanism is as follows.

In the fully closed state where the front door 32 is pushed up to the maximum stroke Lmax, the gas spring 90 is pushed up by the push-up load Ws2 = 8 (Kg) with respect to the front door weight Wo = 10 (kg), and the second upper door 32 is pushed up. When the front door 32 is unlocked with respect to the door 36, the front door 32 starts to slide and fall due to a drop load of 2 (Kg), which is the difference between the front door load Wo and the push-up load Ws2. As shown in the shaded area of, the stroke L decreases in proportion to the decrease of the stroke L accompanying the lowering of the front door 32, and the door falls to the fully closed position and stops.

Actually, since the front door 32 that slides down has velocity inertia, an impact due to velocity inertia is generated at the stroke L = 0, which is the fully closed position (stop position), but before the damping force generated by the damper 92. The falling speed of the door 32 is suppressed, and a large impact force is not generated.

On the other hand, when the operator pulls up the front door 32 from the stroke L0 at the fully open position to close the front door 32, in addition to the pushing force of the assist mechanism against the increase in the stroke L, the shaded portion shown by the operator in FIG. 11 By applying a force that pulls up the load corresponding to the height of the front door 32, the front door 32 can be slid up and closed with a light force.

The pulling load determined by the height of the shaded area increases as the stroke L increases, but the maximum pulling load at the stroke Lmax, which is the fully closed position of the front door 32, is 2 (Kg). The front door 32 can be pulled up and closed with a light force that does not cause a problem in operation.

The load setting in FIG. 11 is an example, and can be set in an appropriate relationship as needed. Further, although the damper 92 is an oil damper filled with oil as an example, it may be a gas damper filled with air or an inert gas, or may be a mechanical spring damper containing a coil spring.

[Other embodiments of the front door assist mechanism]
FIG. 12 is an explanatory view showing another embodiment of the assist mechanism of the front door composed of only the gas spring.

As shown in FIG. 12, in the present embodiment, only the gas spring 90 is arranged on the back side of the front door 32 as the assist mechanism of the front door 32. Similar to the embodiment of FIG. 10, the gas spring 90 is provided with a rod 90b stretchably provided on a cylindrical main body 90a in which pressurized gas and oil are stored, and a rod 90b is provided on a piston housed in the main body 90a. The lower ends of the rod 90b are connected to each other, and a pushing force is applied to the rod 90b via the piston.

The connecting member 90c at the lower end of the main body 90a of the gas spring 90 is fixed to the overhanging portion of the front bottom of the housing 31, and the tip of the rod 90b taken out from the upper part of the main body 90a is on the back surface of the front door 32. It is connected to a fixed door connecting member 98.

As shown in FIG. 11, the gas spring 90 generates a push-up load according to the straight line 100 with respect to the change in the stroke L accompanying the opening and closing of the slide of the front door 32. Therefore, when the front door 32 slides down and is opened, a push-up load that increases according to the straight line 100 is generated with respect to a decrease in the stroke L in which the rod 90b receives the door load and is pushed into the main body 90a, and this push-up load is generated. As for the load, the maximum push-up load Ws1 is obtained when the front door 32 is fully opened at the stroke L = 0, and the push-up load of the gas spring 90 is applied to the front door 32 which slides down to suppress the falling speed and generate an impact. Without this, the front door 32 slides down smoothly and is opened.

Further, when the opened front door 32 is pushed up and closed by the slide ascending, in addition to the pushing-up load of the gas spring 90 with respect to the increase in the stroke L, a force for pulling up the load corresponding to the height of the shaded portion in FIG. 11 is operated. By adding a person, the front door 32 can be pulled up and closed by raising the slide.

Further, since the present embodiment also serves as a shock absorbing mechanism when the gas spring 90 is slid down and opened by sliding the front door 32, the embodiment of FIG. 10 in which the damper 92 is provided as the shock absorbing mechanism is compared with the embodiment. The structure is simple and the cost can be reduced.

[Upper door assist mechanism]
(Operation to open and close the first upper door from the guard passage)
FIG. 13 is an explanatory diagram showing an opening operation of the first upper door when operating from the observer passage side.

As shown in FIG. 13, when the user operates the fire hydrant storage box 30 from the observer passage side, when the user bends down from the observer passage and lifts up the rear opening handle 40, the first upper door is opened. The lock to the housing 31 side on the trailing edge side of 34 is released, the first upper door 34 is rear-opened around the hinge 46 at the front edge corner portion, and the first upper door opening 35 is opened.

At this time, the second upper door 36 is also opened rearward around the hinge 44 integrally with the first upper door 34, and the front opening handle 38 pivotally supported by the hinge 44 does not move and is provided on the front opening handle 38. The tip of the shaft member 56 of the front opening mechanism 60 shown in FIG. 6 is maintained in a state of being fitted into the shaft hole 58a of the shaft member 58 arranged on the back surface of the front door 32, and the front door 32 is closed. The second upper door 36 is rear-opened integrally with the first upper door 34 while maintaining the locking of the above.

Further, an assist stay mechanism is provided on the back side of the hinge 46 of the first upper door 34 to urge the first upper door 34 in the opening direction, and the first upper door 34 is automatically opened after the lock is released. Further, since the force urged in the opening direction is larger than the force toward the closing direction due to the weight of the door, the first upper door 34 is fixed in the fully opened state.

When the first upper door opening 35 is opened by the rear opening of the first upper door 34, it is locked to the nozzle holder 86 arranged on the back side of the second upper door 36 as shown in FIG. 7A. The foam nozzle 78 appears in front of the user who is crouching in the observer passage, and the foam nozzle 78 can be easily taken out and the hose 76 can be pulled out.

(Assist stay mechanism of the first upper door)
14A and 14B are explanatory views showing an upper door assist stay mechanism provided on the first upper door, FIG. 14A shows a door closed state, and FIG. 14B shows a door open state.

As shown in FIG. 14, the first upper door 34 is provided with a hinge 46 on the front edge side of the door, and the hinge 46 is fixed to the back surface of the door and the hinge member 46a whose tip is bent in an arc is placed on the housing 31 side. By inserting it into the arranged cylindrical hinge guide 46, it is rotatably supported around the axis center 108.

The upper door assist stay 106 is provided on the back side of the first upper door 34, and the upper door assist stay 106 is provided at two locations in the lateral direction of the door. In the upper door assist stay 106, the stay arm 106b is rotatably connected to the stay body 106a by the connecting shaft 112, and the lower end of the stay body 106a is fixed to the housing 31 side by the first support shaft 110. The second support shaft 114 at the tip of the stay arm 106b is rotatably supported by the door bearing member 120 which is not fixed to the back surface of the first upper door 34.

Further, a coil spring (not shown) is wound around the first support shaft 110 on the lower side of the stay body 106a, and the other end of the coil spring is locked to the housing bearing member 118 to other than the coil spring. By locking the end to the stay body 106a side, a force is applied to the housing 31 side to urge the stay body 106a in the door opening direction (counterclockwise in the figure) and push it open.

As described above, the upper door assist stay 106 constitutes a two-section link in which the stay main body 106a and the stay arm 106b are pivotally supported by the connecting shaft 112.

Further, the upper door assist stay 106 is shown by an imaginary line with the axis center 108 of the hinge 46, the first support shaft 110, the connecting shaft 112, and the second support shaft 114 as fulcrums in a state of being assembled to the first upper door 34. A four-section parallel link mechanism 116 is configured.

The four-section parallel link mechanism 116 swings in the opening / closing direction with the axis center 108 of the hinge 46 and the first support shaft 110 as a fixed link. Therefore, even if the shaft center 108 of the first upper door 34 and the first support shaft 110 which is the rotation center of the upper door assist stay 106 are different, the stay main body 106a is attached to the housing 31 in the opening direction by the coil spring. By the force, an urging force is applied to the first upper door 34 via the stay arm 106b, and the rotation of the four-section parallel link mechanism 116 makes it possible to smoothly open the first upper door 34 with a light force.

Further, when the first upper door 34 is closed, the upper door assist stay 106 functions as a shock absorbing mechanism, and the first upper door is urged by the coil spring of the stay main body 106a against the housing 31 in the opening direction. The 34 is gently rotated to the opening / closing position to enable smooth closing of the first upper door 34 without causing an impact.

[Modified example of the present invention]
(Foam fire hydrant equipment)
The above embodiment takes as an example a foam fire hydrant facility that discharges fire extinguishing foam, but the present invention is not limited to this, and a fire hydrant facility that discharges fire extinguishing water may be used.

(Second upper door assist mechanism)
The above embodiment includes an upper door assist mechanism that urges the movement to open the first upper door backward, but provides a second upper door assist mechanism that urges the movement to open the second upper door forward. Is also good. The moment for opening the second upper door forward is a certain amount of opening from the time when the second upper door is closed, rather than the moment in the closing direction generated by the hose pulled out when the second upper door, the nozzle and the second upper door are opened. It is preferable that the door is small until it is opened, and that it is large from the opening of a certain amount to the full opening of the second upper door.

For this reason, the second upper door is opened and the nozzle is pulled out just by unlocking the front opening handle and pulling it up a certain amount, so the second upper door is opened without turning the wrist or changing hands. Can be done. Further, since the closing moment is larger from the time when the second upper door is closed until a certain amount is opened, it is not necessary to raise the front door while applying a force in the direction of closing the second upper door at the time of closing.

As the second upper door assist mechanism, like the first upper door assist mechanism, an assist stay may be used, or a mechanism that generates a moment such as a torsion coil spring may be used.

(Installation of fire hydrant storage box)
Further, although the above embodiment takes a tunnel fire hydrant as an example, it may be used for a fire hydrant embedded in a general road. Further, the fire hydrant storage box may be exposed without being embedded. When used for an exposed fire hydrant storage box, it is preferable that the upper door comes to a height of about 1 meter in order to facilitate the opening / closing operation of the upper door and to facilitate the removal of the nozzle. In addition, the fire hydrant storage box of the present application may be installed on two passage surfaces having different heights, or on a surface having different heights on which a person can walk and a wall surface in contact with the surface, such as on a stage such as a gymnasium or a stage and below. May be applied.

(others)
Further, the present invention includes appropriate modifications that do not impair its purpose and advantages, and is not further limited by the numerical values shown in the above embodiments.

10: Tunnel 12: Tunnel wall surface 14: Observer passage 15: Road 16: Fire extinguisher equipment 18: Floor slab 20: Management passage 22: Duct 24: Water supply main 24a: Branch pipe 25: Water supply pipe 26: Water discharge control mechanism storage Part 30: Fire extinguisher storage box 31: Housing 32: Front door 33: Front door opening 34: First upper door 35: First upper door opening 36: Second upper door 37: Second upper door opening 38: Front opening handle 40: Rear opening handles 42, 44, 46: Hinge 48: Notification device panel 56: Shaft member 58: Bearing member 58a: Shaft hole 60: Front opening mechanism 74: Hose housing 76: Hose 78: Foam nozzle 80: Hose guide Structures 80a to 80d, 82a to 82c, 84a to 84c: Guide pipe 86: Nozzle holder 88: Guide member 90: Gas spring 90a, 92a: Main body 90b, 92b: Rod 92: Damper 94: Door stopper 96: Housing support member 98, 120: Door connecting member 106: Upper door assist stay 106a: Stay body 106b: Stay arm 108: Axis center 110: First support shaft 112: Connecting shaft 114: Second support shaft 116: 4-section parallel link mechanism 118: Housing bearing member 120: Door bearing member

Claims (8)

A housing that is embedded in the guard passage along the tunnel wall and houses a hose with a nozzle,
A front door that can be opened and closed from the front door opening provided on the front of the housing that is on the road side in the installed state, and a front door.
In the installed state, the upper surface door opening provided on the upper surface of the housing, which is the road surface side of the observer passage, is arranged so as to be openable and closable, and the front opening is opened by rotating from the road side toward the tunnel wall surface side. And the upper door that can be opened after turning from the tunnel wall surface side toward the road side and opening.
It is a fire hydrant device equipped with
Further , the fire hydrant device is provided with an upper door assist mechanism for encouraging the movement of opening the upper door to the front opening and / or the rear opening .
The fire hydrant device according to claim 1, further
A first opening operation unit in which an operation for opening the upper door to the rear opening is performed, and
A second opening operation unit in which an operation for opening the upper door to the front opening is performed, and
A first opening mechanism operated by the first opening operation unit to open the upper door to the rear opening.
A second opening mechanism operated by the second opening operation unit to open the upper door to the front opening.
Equipped with
The second opening mechanism holds the front door together with the upper door when the upper door is in the closed position, and operates the second opening operation unit when the upper door is in the closed position. A fire hydrant device characterized in that the holding of the upper door and the front door is released so that the front door can be opened and the upper door can be opened to the front opening.
A housing that is embedded in the guard passage along the tunnel wall and houses a hose with a nozzle,
A front door that can be opened and closed from the front door opening provided on the front of the housing that is on the road side in the installed state, and a front door.
In the installed state, the upper surface door opening provided on the upper surface of the housing, which is the road surface side of the observer passage, is arranged so as to be openable and closable , and is integrated with the second upper door described later from the tunnel wall surface side toward the road side. The first upper door , which can be opened by rotating and opening afterwards ,
The second upper door opening provided on the upper surface of the first upper door, which is the road surface side of the observer passage, is arranged so as to be openable and closable , and before opening by rotating from the road side toward the tunnel wall surface side. The second upper door that can be opened to open , and
It is a fire hydrant device equipped with
Further, a first upper door assist mechanism that urges the movement to open the first upper door to the rear opening integrally with the second upper door , and / or a movement to open the second upper door to the front opening. A fire hydrant device characterized by being equipped with an urging second upper door assist mechanism.
The fire hydrant device according to claim 3, further
A first opening operation unit for performing an operation for opening the first upper door to the rear opening integrally with the second upper door.
A second opening operation unit in which an operation for opening the second upper door to the front opening is performed, and
A first opening mechanism operated by the first opening operation unit to open the first upper door to the rear opening integrally with the second upper door.
A second opening mechanism operated by the second opening operation unit to open the second upper door to the front opening.
Equipped with
The second opening mechanism holds the front door together with the second upper door when the second upper door is in the closed position, and the second opening operation when the second upper door is in the closed position. When the unit is operated, the holding of the second upper door and the front door is released so that the front door can be opened, and the second upper door can be opened to the front opening. Fire extinguisher device.
A housing that is embedded in the guard passage along the tunnel wall and houses a hose with a nozzle,
A front door that can be opened and closed from the front door opening provided on the front of the housing on the road side, and a front door.
The front door opening provided on the upper surface of the housing, which is the road surface side of the observer passage, is arranged so as to be openable and closable, and the front opening and the tunnel wall surface are opened by rotating from the road side toward the tunnel wall surface side. An upper door that can be opened by rotating from the side toward the road side and opening afterwards,
It is a fire hydrant facility equipped with a fire hydrant device provided with
The fire hydrant device is provided with an upper door assist mechanism for encouraging the movement of opening the upper door to the front opening and / or the rear opening .
The fire hydrant equipment according to claim 5.
The fire hydrant device further
A first opening operation unit in which an operation for opening the upper door to the rear opening is performed, and
A second opening operation unit in which an operation for opening the upper door to the front opening is performed, and
A first opening mechanism operated by the first opening operation unit to open the upper door to the rear opening.
A second opening mechanism operated by the second opening operation unit to open the upper door to the front opening.
Equipped with
The second opening mechanism holds the front door together with the upper door when the upper door is in the closed position, and operates the second opening operation unit when the upper door is in the closed position. A fire hydrant facility characterized in that the holding of the upper door and the front door is released so that the front door can be opened and the upper door can be opened to the front opening.
A housing that is embedded in the guard passage along the tunnel wall and houses a hose with a nozzle,
A front door that can be opened and closed from the front door opening provided on the front of the housing on the road side, and a front door.
The upper door opening provided on the upper surface of the housing, which is the road surface side of the observer passage, is arranged so as to be openable and closable , and rotates integrally with the second upper door described later from the tunnel wall surface side toward the road side. The first upper door , which can be opened after opening ,
The second upper door opening provided on the upper surface of the first upper door, which is the road surface side of the observer passage, is arranged so as to be openable and closable , and before opening by rotating from the road side toward the tunnel wall surface side. The second upper door that can be opened to open , and
It is a fire hydrant facility equipped with a fire hydrant device provided with
The fire hydrant device opens the first upper door assist mechanism that urges the movement to open the first upper door to the rear opening integrally with the second upper door , and / or the second upper door to the front opening. A fire hydrant facility equipped with a second upper door assist mechanism that encourages movement .
The fire hydrant equipment according to claim 7.
The fire hydrant device further
A first opening operation unit for performing an operation for opening the first upper door to the rear opening integrally with the second upper door.
A second opening operation unit in which an operation for opening the second upper door to the front opening is performed, and
A first opening mechanism operated by the first opening operation unit to open the first upper door to the rear opening integrally with the second upper door.
A second opening mechanism operated by the second opening operation unit to open the second upper door to the front opening.
The second opening mechanism holds the front door together with the second upper door when the second upper door is in the closed position, and the second opening operation when the second upper door is in the closed position. When the unit is operated, the holding of the second upper door and the front door is released so that the front door can be opened, and the second upper door can be opened to the front opening. Fire extinguisher equipment.

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