JP2023175926A - Fire hydrant device and fire hydrant facility - Google Patents

Abstract

To enable a front door and an upper door to be easily opened and enable a fire hydrant device to be easily handled.SOLUTION: A fire hydrant device comprises: a front door 32 which is provided on a front surface in a freely openable/closable manner; a first upper door 34 and a second upper door 36 as the upper doors provided on an upper surface in a freely openable/closable manner; and a front opening handle 38 which can open the front door 32 and open the second upper door 36. When the front door 32 and the second upper door 36 are opened by operating the front opening handle 38, a front surface door opening 33 and a second upper surface door opening 37 being a series of openings from the front surface to the upper surface are opened.SELECTED DRAWING: Figure 2

Description

The present invention relates to a fire hydrant device in which a fire hose is housed, and a fire hydrant equipment equipped with the fire hydrant device.

Conventionally, fire hydrant devices have been installed as tunnel emergency equipment in tunnels such as expressways and motorways.The fire hydrant device is equipped with a fire hydrant door that can be opened freely, and a hose with a nozzle attached to the tip and a fire hydrant valve. Contains valves, including valves.

Fire hydrant devices are generally installed embedded in the tunnel wall surface at intervals of, for example, 50 meters along the tunnel side wall. In the event of a vehicle accident involving a fire, in tunnels with a lifeguard passageway, road users such as the driver of the accident vehicle should climb onto the lifeguard passageway using steps installed on the side of the lifeguard passageway and climb up the tunnel. The fire hydrant door of the fire hydrant device installed on the wall is opened forward and a hose with a nozzle is taken out to extinguish the fire.

The observer passageway is built as a sidewall passageway raised above the road surface, making it possible to safely inspect various equipment installed inside the tunnel, including fire hydrant systems, without interfering with vehicle traffic inside the tunnel. .

In addition, in tunnels without lifeguard passageways, users such as the driver of the accident vehicle should approach the fire hydrant device installed on the tunnel wall, open the fire hydrant door forward, and install the hose with a nozzle. We are trying to take out the fire and extinguish the fire.

Japanese Patent Application Publication No. 2006-181057 Japanese Patent Application Publication No. 2008-055024 JP2009-285126A Japanese Patent Application Publication No. 2006-181057 Japanese Patent Application Publication No. 2001-238976 Japanese Patent Application Publication No. 2003-190315 Utility Model Publication No. 01-138465

By the way, urban tunnels made using the shield method etc. have a structure that does not allow the installation of a fire hydrant device embedded in the tunnel wall, and it is necessary to install the fire hydrant device embedded in the side (wall surface) of the lifeguard passage.

However, when a fire hydrant device with a door that opens forward like a conventional fire hydrant is installed in a lifeguard passageway, there is a problem that when the fire hydrant door opens, the fire hydrant exceeds the building limit and protrudes onto the road.

In order to solve this problem, the applicant installed a fire hydrant storage box embedded in the lifeguard passage, provided a front door that slides open and closed facing the road, and installed a front door that opens and closes upward on the lifeguard passage. We are currently considering a fire hydrant storage box with a top door that can be used to store fire hydrants.

According to the fire hydrant storage box embedded in the lifeguard passage, in the event of a fire caused by a vehicle accident, users can easily and easily remove the nozzle from the hose storage area by opening the front door facing the road. You can extinguish a fire by pulling out the attached hose. In addition, if a vehicle is stopped in front of a fire hydrant system and operation from the front door is not possible, by opening the upper door of the lifeguard passage, the hose with a nozzle can be pulled out to extinguish the fire without being obstructed by the stopped vehicle. It can be carried out.

By the way, by opening the upper door from the road side of the lifeguard passageway, you can pull out a hose with a nozzle and extinguish the fire, but opening the upper door requires bending over and working with a heavy The problem is that opening the door increases the workload for the user.

In addition, it is equipped with an upper door and a front door so that it can be handled from the road side and the road side of the lifeguard passageway, and the door to be opened differs depending on the operating location, making it more difficult for users to handle the fire hydrant than before. There is also a problem.

SUMMARY OF THE INVENTION An object of the present invention is to provide a fire hydrant device and fire hydrant equipment that enable the front door and the upper door to be easily opened and to be handled easily.

(Fire hydrant device)
The present invention is a fire hydrant device in which a fire hose is housed,
A front door that can be opened and closed at the front of the fire hydrant device,
An upper door that can be opened and closed freely on the top of the fire hydrant device,
an operation unit that can open the front door and open the upper door;
Equipped with
The fire hydrant device is characterized in that a series of openings are opened from the front side to the top side of the fire hydrant device when the front door and the top door are opened by operating the operating section.

(Position of operation part)
The operating section is provided on the front edge side of the upper door, and is located at the front upper part of the front door when the upper door is closed.

(Upper door configuration)
The upper door is
a first upper door disposed in a first upper door opening formed on the upper surface of the fire hydrant device so as to rotate to open and close about its own front edge;
a second upper door arranged in a second upper door opening formed in the first upper door so as to be opened and closed by rotating around its own rear edge side opposite to the front edge side;
Equipped with
By operating the operating section, it is possible to open the front door and also open the second upper door of the upper door.

(Fire hydrant equipment)
In another form of the present invention, in a fire hydrant equipment equipped with a fire hydrant embedded part that is an internal space under the road surface of a lifeguard passage along a tunnel wall surface in a tunnel,
The above-described fire hydrant device is characterized in that the fire hydrant device is embedded in the fire hydrant embedding part so that the upper surface is exposed to the road side of the lifeguard passage and the front surface is exposed to the road side.

(Effects of fire hydrant equipment)
The present invention is a fire hydrant device in which a fire hose is housed, and includes a front door that can be opened and closed on the front of the fire hydrant device, an upper door that can be opened and closed on the top of the fire hydrant device, and a front door that can be opened and closed on the top of the fire hydrant device. an operating section capable of opening the door and the upper door, and when the operating section is operated to open the front door and the upper door, a series of openings are formed from the front surface to the upper surface of the fire hydrant device. Since the front door and the upper door are opened, it is possible to easily open the front door and the upper door with one operation part, and it is possible to easily take out the fire extinguishing hose from the opening that is wide open from the front surface to the top surface.

(Effect of the position of the operating section)
The operating section is provided on the front edge of the upper door, and is located at the front upper part of the front door when the upper door is closed, so it can be easily operated from either the front side or the top side of the fire hydrant device. shall be.

An explanatory diagram showing tunnel emergency equipment, including fire hydrant equipment, installed inside a tunnel on a motorway. An explanatory diagram showing the appearance of the fire hydrant storage box during normal times An explanatory diagram showing the external appearance of the fire hydrant storage box in Figure 2 from the front and from the top. An explanatory diagram showing the external appearance of the fire hydrant storage box in Figure 2 from the side. Explanatory diagram showing the front-opening handle part of a fire hydrant storage box equipped with a front-opening mechanism An explanatory diagram showing the mechanical structure of the front-opening mechanism that opens the second upper door forward and slides it open when the front door falls. Explanatory diagram showing the internal structure of a fire hydrant storage box Explanatory diagram showing the opening operation of the front door and second upper door when operating from the road side Explanatory diagram showing the assist mechanism installed on the back side of the front door An explanatory diagram showing the gas spring and damper installed in the assist mechanism in Figure 9. A graph diagram showing the change in the load of the gas spring with respect to the stroke of the front door in the embodiment of FIG. 9 Explanatory diagram showing another embodiment of the front door assist mechanism composed only of gas springs Explanatory diagram showing the opening operation of the first upper door when operating from the observer passage side Explanatory diagram showing the upper door assist stay mechanism provided on the first upper door

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

A lifeguard passageway 14 is provided along the tunnel wall surface 12 on the left side of the road 15 divided by a floor slab 18, and the interior space below the lifeguard passageway 14 is used as a duct 22, in which electrical conduits and the like are laid. . The lifeguard passageway 14 has dimensions of, for example, 90 centimeters in height and 70 centimeters in width.

The lower side of the floor slab 18 on which the road 15 is formed is partitioned into a plurality of sections in the tunnel lateral direction. For example, the section located below the lifeguard passage 14 is used as a management passage 20, and The management passage 20 is used as an emergency evacuation passage when a fire breaks out in the tunnel. A water supply main pipe 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 equipment 16 is installed separately into a fire hydrant storage box 30 in which a hose is stored and a water discharge control mechanism storage part 26. .

The fire hydrant storage box 30 is arranged in a fire hydrant embedded part hollowed out in a box shape over the road surface of the lifeguard passageway 14 and the wall surface on the road 15 side. The water discharge control mechanism storage section 26 is arranged in the management passage 20 below the fire hydrant storage box 30, into which a branch pipe 24a branched from the water supply main 24 is drawn, and also supplies fire extinguishing water to the fire hydrant storage box 30. A water supply pipe 25 has been set up.

[Fire hydrant equipment]
Figure 2 is an explanatory diagram showing the external appearance of the fire hydrant storage box in normal conditions, Figure 3 is an explanatory diagram showing the external appearance of the fire hydrant storage box in Figure 2 from the front and plane, and Figure 4 is an explanatory diagram showing the external appearance of the fire hydrant storage box in Figure 2. It is an explanatory view shown from the side.

(External 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 in an internal space under the road surface of the lifeguard passageway 14. The fire hydrant storage box 30 has a front door 32 disposed in a front door opening 33 formed above the front center of a housing 31 so as to be slidable in the vertical direction.

Further, a first upper door 34 having the same width as the front door 32 is disposed in a first upper door opening 35 formed at the center of the upper surface of the fire hydrant storage box 30 facing the road surface of the lifeguard passageway 14. Furthermore, a second upper door opening 37 is formed at the center of the front side of the first upper door 34, and a second upper door 36 is disposed therein.

The first upper door 34 is pivotally supported on both sides of the door front edge by arc-shaped hinges 46 arranged at the front edge corners of the upper part of the housing 31, as shown in the first upper door 34a in FIG. By rotating the hinge 46, it is possible to open the back opening upward.

The rear edge of the second upper door 36 is pivotally supported by a hinge 42 on the second upper door opening 37 of the first upper door 34, and as shown in the second upper door 36a in FIG. The front opening opens upwards.

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

As will be explained later, an assist mechanism including a gas spring and a damper is provided on the back side of the front door 32.

Here, the hinge 46 that rotatably supports the first upper door 34 on the front edge corner of the housing 31 and the hinge 44 that supports the front opening handle 38 on the front edge of the second upper door 36 are as follows: The front opening handle 38 that locks the housing 31 and the front door 32 in the closed position is the fixed side, and the second upper door is opened by the hinges 44 and 46. Together with 36, the first upper door 34 is pivotally supported so that it can be opened rearward.

A notification device panel 48 is provided on the upper left front side of the fire hydrant storage box 30. The reporting device panel 48 is provided with a red indicator light 50, a transmitter 52, a response lamp 54, and a telephone jack 55. The red indicator light 50 is always on, 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 outgoing signal is sent to the disaster prevention receiver installed in the monitoring center of the monitoring room and a fire alarm is issued. , the response lamp 54 is lit, and the red indicator lamp 50 is blinked.

[Front opening mechanism]
FIG. 5 is an explanatory diagram showing the front-opening handle portion of a fire hydrant storage box equipped with a front-opening mechanism, with FIG. 5(A) showing the front and FIG. 5(B) The side view seen from XX is shown. FIG. 6 is an explanatory diagram showing the mechanical structure of the front-opening mechanism that opens the second upper door and slides it open when the front door falls. FIG. 6(A) shows the closed state, and FIG. 6(B) indicates the state in which the front opening handle is opened.

As shown in FIG. 5, on both sides of the handle body 38a of the front-opening handle 38, which is pivotally supported by a hinge 44 at the tip of the second upper door 36 disposed on the top surface of the fire hydrant storage box 30, there are shafts of the front-opening mechanism. The member 56 has been taken out, and when the second upper door 36 is closed, 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, so that the second upper door 36 is closed. The front door 32 is locked to 36 and held in the closed position.

When the front-opening handle 38 is lifted up, the shaft member 56 is pulled inward, and by coming out of the shaft hole of the bearing member 58, the locking of the front door 32 is released, and the front door 32 slides and falls due to its own weight. to open the front door opening 33.

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

When the front-opening handle 38 is not operated, the link 62 rotates outward under the force of the spring 72, fitting the shaft member 56 into the shaft hole 58a of the bearing member 58, and opening the second upper door 36. The front door 32 is locked in place.

When the front-opening handle 38 is lifted up, the moving fulcrum 64 moves downward against the spring 72 via a link mechanism (not shown), as shown in FIG. 6(B), and the link 62 rotates inward. By moving and pulling the shaft member 56 inward, the tip of the shaft member 56 is removed 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. to open the front door opening 33.

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

[Internal structure of fire hydrant storage box]
FIG. 7 is an explanatory diagram showing the internal structure of the fire hydrant storage box, with FIG. 7(A) showing the front and FIG. 7(B) showing the side as seen from the YY cross section of FIG. 7(A).

As shown in FIG. 7, the inside lower side of the casing 31 in the fire hydrant storage box 30 is a hose storage section 74, in which hoses 76 having a shape-retaining structure are horizontally stacked and wound inward.

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. The shape is a rounded rectangle consisting of two parallel lines and two semicircles, and the length of one turn of the hose 76 wound inside the planar rectangular housing 31 is approximately 3.5 meters. Since the length is required to be 30 meters or more, the hose 76 may be wound inward by overlapping nine turns or more.

Here, the hose 76 wound inside the housing 31 into a rectangular shape with rounded corners is shown as parallel hose portions 76a, 76c and semicircular hose portions 76b, 76d.

A hose guide structure 80 is provided on the central front side of the casing 31 for deforming inward the parallel line hose portion 76a on the front side of the hose 76 wound inside the casing 31 into a rounded rectangle.

The hose guide structure 80 has four guide pipes 80a, 80b, 80c, and 80d made of metal pipes erected on a bottom plate 81, and the guide pipes 80a and 80d at both ends are erected along the inner surface of the housing 31. The central guide pipes 80b and 80c are separated inward by a predetermined length and stand upright, and the hose 76 is wound inward along the guide pipes 80a, 80b, 80c, and 80d of the hose guide structure 80, so that the front side of the hose 76 is The parallel line hose portion 76a is deformed inwardly into a shape close to a gourd shape, and due to this deformation, a repulsive force is generated in the deformed parallel line hose portion 76a of the hose 76, which tends to spread outward.

By providing such a hose guide structure 80, the hose 76 that is overlapped and wound internally within the housing 31 has a rounded oval parallel line hose portion 76a that 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 of the housing 31 is generated, so that even if the parallel hose portions 76a and 76c of the overlapping inwardly wound hose 76 become longer, To surely prevent collapse inward.

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

Furthermore, 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, the hose 76 tries to be pushed out due to the deformation of the semicircular hose portions 76b and 76d. In addition to the force, the parallel hose portion 76a of the hose 76 is also deformed inward by the hose guide structure 80, generating a force that tries to push out the hose 76, making it possible to reduce the force with which the hose 76 is pulled out.

At the upper part of the hose guide structure 80, guide pipes 82a to 82c and guide pipes are provided so as to surround the inside of the front door opening 33, the first top door opening 35, and the second top door opening 37 shown in FIGS. 1 and 2. 84a to 84c are arranged, and when the hose 76 is pulled out, it is brought into sliding contact with the guide pipes 82a to 82c or the guide pipes 84a to 84c, thereby preventing wear and tear on the hose 76 and reducing the force with which the hose is pulled out.

Further, a foam nozzle 78 connected to the tip of the hose 76 is detachably latched to the back surface of the second upper door 36 by a nozzle holder 86. The nozzle holder 86 of this embodiment has 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. When the upper door 36a is opened from the front, or when the first upper door 34 and the second upper door 36 are integrally opened from the rear as shown in the first upper door 34a in FIG. A nozzle holder 86 locks a foam nozzle 78 in a suspended state on the back surface of the door 36.

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

When the second upper door 36 opens forward, the foam nozzle 78 held on the back side of the door appears in a range of approximately 0.9 to 1.3 meters from the road 15, which is approximately 0.9 to 1.3 meters from the road 15. This corresponds to the range from the waist to the shoulders of the user, and since the foam nozzle 78 appears in front of the user, the foam nozzle 78 can be easily taken out.

Furthermore, when the first upper door 34 opens backward, the foam nozzle 78 held on the back side of the door appears at a position within a range of approximately 0.2 to 0.4 meters from the road surface of the lifeguard passageway 14. The foam nozzle 78 appears in front of the user who is bending over the lifeguard passageway 14 and operating the rear-opening handle 40, and the user can easily take out the foam nozzle 78 from the lifeguard passageway 14 side. .

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

Further, one or more of the operation box, manual pilot valve, and fire hydrant opening/closing lever may be arranged in the empty space secured by the hose guide structure 80. Further, a connecting member between the manual pilot valve and the fire hydrant opening/closing lever or 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 lifeguard passage where space is limited.

[Operation to open the second upper door and front door from the road side]
FIG. 8 is an explanatory diagram showing the opening operation of the front door and the second upper door when operated 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 user lifts up the front opening handle 38, the front door 32 is unlocked and the front door 32 slides under its own weight. It falls, and the front door opening 33 is opened. At this time, the impact when the front door 32 opens and falls is absorbed by the assist mechanism arranged on the back side thereof.

Subsequently, when the user performs a forward opening operation to open the second upper door 36 in the depth direction, the shaft members 56 disposed on both sides of the handle body 38a open as shown in FIGS. is pulled out from the bearing member 58 on the back side 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. 7(A), 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 user can easily take out the foam nozzle 78 and pull out the hose 76.

On the other hand, when the fire extinguishing work is completed, after draining the water from the hose 76 that has been pulled out, the hose 76 is wound back into the housing 31 as shown in FIG. 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, and the front door 32 is held in the closed state.

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

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

(Structure of assist mechanism)
As shown in FIG. 9, the front door 32 provided on the front surface of the casing 31 is slidable vertically along guide grooves formed between guide members 88 on both sides and the front frame of the casing 31. is embedded in. On the back side of the front door 32, as assist mechanisms, a damper 92 constituting a shock absorbing mechanism and a gas spring 90 constituting an upward biasing mechanism are arranged.

As shown in FIG. 10, the gas spring 90 has a cylindrical main body 90a containing pressurized gas and oil, and a rod 90b that is extendable and retractable. The lower end of the rod 90b is connected, and an upward force is applied to the rod 90b via a piston.

The connecting member 90c at the lower end of the main body 90a of the gas spring 90 is fixed to a housing support member 96 at the protruding portion of the front bottom of the housing 31, and the tip of the rod 90b taken out from the top 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 provided in a cylindrical main body 92a so as to be extendable and retractable. A piston equipped with an orifice hole and a check valve is slidably installed in the main body 92a, and a lower end of the rod 92b is installed in the main body 92a. The main body 92a is fixed to the piston and 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 a case support member 96 at the protruding part of the front bottom of the case 31, and the tip of the rod 92b taken out from the top of the main body 92a is , is connected to a door connecting member 98 fixed to the back surface of the front door 32.

Therefore, when the rod 92b descends, the oil moves through the orifice hole of the piston, and a damping force proportional to the descending speed of the piston is generated, which reduces the descending speed of the front door 32, causing the front door 32 to close. To suppress the impact when falling to a stopper 94 and stopping.

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

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

(Gas spring and damper load settings)
As shown in FIG. 11, the gas spring 90 has a push-up load Ws2 when the front door 32 is held in the fully closed position and the stroke of the rod 90b is the maximum stroke Lmax, and a push-up load Ws2 when the front door 32 is held in the fully closed position and the rod 90b is held in the fully closed position. If the push-up load when the stroke L of the rod 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 by a straight line 100.

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

Here, if the front door load corresponding to the weight of the front door 32 is Wo, then since the front door 32 slides up and down, the rod 90b of the gas spring 90 always has a constant forward movement as the stroke L changes. A 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 front door 32 slides down to the fully open position and the stroke L=0 is lowered by a predetermined load. For example, if 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 front door 32 slides up to the fully closed position and the stroke L=Lmax is set to, for example, 8 (Kg).

Due to the load setting of the gas spring 90, the load in the upward direction applied to the front door 32 by the gas spring 90 has a characteristic of a straight line 100 with respect to a change in stroke.

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

When the front door 32 is in the fully closed state pushed up to the maximum stroke Lmax, the gas spring 90 is pushing up the front door weight Wo=10 (kg) with a push-up load Ws2=8 (Kg), and the second upper When the front door 32 is released from the door 36, the front door 32 starts to slide down due to a falling load of 2 (Kg), which is the difference between the front door load Wo and the push-up load Ws2, and this falling load is as shown in FIG. As shown in the shaded area, the front door 32 decreases in proportion to the decrease in stroke L as the front door 32 descends, falls to the fully closed position, and stops.

In reality, since the front door 32 that slides downward has speed inertia, it generates an impact due to speed inertia at 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 no large impact force is generated.

On the other hand, when the operator pulls up the front door 32 from stroke L0, which is the fully open position, to close the front door 32, in addition to the upward force of the assist mechanism with respect to the increase in stroke L, the operator By applying a force to lift the load corresponding to the height of , the front door 32 can be slid up and closed with a light force.

The lifting load determined by the height of this shaded area increases as the stroke L increases, but the maximum lifting 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 any operational problems.

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

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

As shown in FIG. 12, in this embodiment, only a gas spring 90 is disposed on the back side of the front door 32 as an assist mechanism for the front door 32. Similar to the embodiment shown in FIG. 10, the gas spring 90 has a cylindrical main body 90a that stores pressurized gas and oil, and a rod 90b that is extendable and retractable. The lower ends of the rods 90b and 90b are connected to each other, and apply upward force to the rod 90b via a piston.

The connecting member 90c at the lower end of the main body 90a of the gas spring 90 is fixed to the protruding part at 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 attached to 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 an upward load along a straight line 100 in response to a change in stroke L as the front door 32 slides open and close. Therefore, when the front door 32 slides down and is opened, a push-up load is generated that increases along the straight line 100 in response to a decrease in the stroke L in which the rod 90b receives the door load and is pushed into the main body 90a. The load becomes the maximum push-up load Ws1 when the front door 32 is in the fully open position with stroke L=0, and the push-up load of the gas spring 90 is applied to the front door 32 sliding down, suppressing the falling speed and generating an impact. The front door 32 smoothly slides down and opens without any movement.

In addition, when the opened front door 32 is pushed up and closed by sliding upward, in addition to the push-up load of the gas spring 90 corresponding to the increase in the stroke L, the force to pull up the load corresponding to the height of the diagonally shaded part in FIG. 11 is operated. The front door 32 can be closed by pulling up the front door 32 and sliding it upward.

In addition, in this embodiment, the gas spring 90 also serves as a shock absorption mechanism when the front door 32 is slid and dropped, and therefore, in contrast to the embodiment of FIG. 10 in which the damper 92 is provided as a shock absorption mechanism, The structure is simple and costs can be reduced.

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

As shown in FIG. 13, when the user operates the fire hydrant storage box 30 from the lifeguard passage side, when the user bends over from the lifeguard passage and lifts up the rear opening handle 40, the first upper door opens. 34 is released from being locked to the housing 31 side, the first upper door 34 is opened backward around the hinge 46 at the front edge corner, and the first upper door opening 35 is opened.

At this time, the second upper door 36 is also opened rearward about the hinge 44 together with the first upper door 34, and the front opening handle 38 supported by the hinge 44 does not move. The tip of the shaft member 56 of the front-opening mechanism 60 shown in FIG. The second upper door 36 is rearwardly opened integrally with the first upper door 34 while retaining the lock.

Further, an assist stay mechanism is provided on the back side of the hinge 46 of the first upper door 34, and urges the first upper door 34 in the opening direction, so that the first upper door 34 is automatically opened after being unlocked. Moreover, since the force biased in the opening direction is greater than the force biased in the closing direction due to the door weight, the first upper door 34 is fixed in the fully open state.

When the first upper door opening 35 is opened by the rear opening of the first upper door 34, the nozzle holder 86 disposed on the back side of the second upper door 36 is locked, as shown in FIG. 7(A). The foam nozzle 78 that has been removed appears in front of the user who is bending down in the lifeguard passage, and can easily take out the foam nozzle 78 and pull out the hose 76.

(First upper door assist stay mechanism)
FIG. 14 is an explanatory diagram showing the upper door assist stay mechanism provided in the first upper door, with FIG. 14(A) showing the door closed state and FIG. 14(B) showing the 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. By being inserted into the arranged cylindrical hinge guide 46, it is supported rotatably about the shaft center 108.

Upper door assist stays 106 are provided on the back side of the first upper door 34, and the upper door assist stays 106 are provided at two locations in the lateral direction of the door. In the upper door assist stay 106, a stay arm 106b is rotatably connected to a stay body 106a by a connecting shaft 112, and the lower end of the stay body 106a is a housing bearing member fixed to the housing 31 side by a first support shaft 110. The second support shaft 114 at the tip of the stay arm 106b is rotatably supported by a door bearing member 120 that 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 latched to a housing bearing member 118. By locking the end to the stay main body 106a side, a force is applied to the housing 31 side to urge the stay main body 106a in the door opening direction (counterclockwise in the figure) and push it open.

In this way, the upper door assist stay 106 constitutes a two-bar link in which the stay main body 106a and the stay arm 106b are pivotally supported by the connecting shaft 112.

The upper door assist stay 106 is shown assembled to the first upper door 34 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 supporting points. A four-bar parallel link mechanism 116 is configured.

The four-bar parallel link mechanism 116 swings in the opening and closing direction with a fixed link between the axial center 108 of the hinge 46 and the first support shaft 110. Therefore, even if the axis 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. The force applies a biasing force to the first upper door 34 via the stay arm 106b, and the rotation of the four-bar parallel link mechanism 116 allows the first upper door 34 to be opened smoothly with a light force.

In addition, when closing the first upper door 34, the upper door assist stay 106 functions as a shock absorption mechanism, and the coil spring of the stay body 106a is biased in the opening direction against the housing 31, so that the first upper door The first upper door 34 can be smoothly closed without causing an impact by gently rotating the first upper door 34 to the opening/closing position.

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

(Second upper door assist mechanism)
Although the above embodiment includes an upper door assist mechanism that urges the movement of opening the first upper door backward, it also includes a second upper door assist mechanism that urges the movement of opening the second upper door forward. Also good. The moment that causes the second upper door to open forward is greater than the moment in the closing direction generated by the second upper door, the nozzle, and the hose that is pulled out when the second upper door is opened. It is preferable that the opening be small until it is opened, and large from opening a certain amount to fully opening the second upper door.

Therefore, by simply unlocking the front-opening handle and pulling it up a certain amount, the second upper door will be opened and the nozzle will be pulled out, allowing you to open the second upper door without turning your wrist or changing your grip. I can do it. Furthermore, since the closing moment is greater from when the second upper door is closed until it is opened by a certain amount, there is no need to raise the front door while applying force in the direction of closing the second upper door when closing.

The second upper door assist mechanism may use an assist stay like the first upper door assist mechanism, or may use something that generates a moment, such as a torsion coil spring.

(Installation of fire hydrant storage box)
Moreover, although the above embodiment takes a tunnel fire hydrant as an example, it may also be used for a fire hydrant embedded in a general road. Alternatively, the fire hydrant storage box may be exposed without being embedded. When used in an exposed type fire hydrant storage box, it is preferable that the upper door be at a height of about 1 meter to make it easier to open and close the upper door and to take out the nozzle. In addition, the fire hydrant storage box of the present invention can be installed on two aisle surfaces of different heights, or on surfaces with different heights that people can walk on, such as the top and bottom of a podium in a gymnasium or stage, and on a wall that is in contact with the surface. May be applied.

(others)
Furthermore, the present invention includes appropriate modifications without impairing its objects and advantages, and is not limited by the numerical values shown in the above embodiments.

10: Tunnel 12: Tunnel wall 14: Observer passage 15: Road 16: Fire hydrant equipment 18: Floor slab 20: Management passage 22: Duct 24: Main water supply pipe 24a: Branch pipe 25: Water supply pipe 26: Water discharge control mechanism storage Part 30: Fire hydrant 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 handle 42, 44, 46: Hinge 48: Notification device panel 56: Shaft member 58: Bearing member 58a: Shaft hole 60: Front opening mechanism 74: Hose storage section 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 springs 90a, 92a: Main bodies 90b, 92b: Rod 92: Damper 94: Door stopper 96: Housing support member 98, 120: Door connecting member 106: Upper door assist stay 106a: Stay main body 106b: Stay arm 108: Shaft center 110: First support shaft 112: Connection shaft 114: Second support shaft 116: 4-section parallel link mechanism 118: Housing bearing member 120: Door bearing member

Claims (4)

A fire hydrant device with a fire hose stored inside,
a front door provided in the front of the fire hydrant device so as to be openable and closable;
an upper door provided on the upper surface of the fire hydrant device so as to be openable and closable;
an operation unit capable of opening the front door and opening the upper door;
Equipped with
A fire hydrant device, wherein a series of openings are opened from the front surface to the top surface of the fire hydrant device when the front door and the top door are opened by operating the operating portion.
The fire hydrant device according to claim 1,
The fire hydrant device is characterized in that the operation section is provided on a front edge side of the upper door, and is located at the upper front side of the front door when the upper door is closed.
The fire hydrant device according to claim 1 or 2,
The upper door is
a first upper door disposed in a first upper door opening formed on the upper surface of the fire hydrant device so as to rotate to open and close about its own front edge;
a second upper door disposed in a second upper door opening formed in the first upper door so as to rotate to open and close about its own rear edge side opposite to the front edge side;
Equipped with
A fire hydrant device, wherein the front door and the second upper door of the upper door can be opened by operating the operating section.
In fire hydrant equipment equipped with a fire hydrant embedded part, which is the internal space under the road surface of the lifeguard passage along the tunnel wall in the tunnel,
The fire hydrant device according to any one of claims 1 to 3 is embedded in the fire hydrant embedded part so that the upper surface is exposed to the road side of the lifeguard passage and the front surface is exposed to the road side. Characteristic fire hydrant equipment.

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