Fire hydrant device

Abstract

To thin and downsize a fire hydrant device by reducing a hose storage space by reducing the length of a hose in a non-water circulation state.SOLUTION: A fire hose 20 stored in a housing of a fire hydrant device 10 in a manner to be pulled out freely is formed of a flexible hose 48b with predetermined lengths on a nozzle 38 side mounted on a hose tip and on a side opposite to the nozzle 38 (hose root side), and a non-flexible hose 46a with a remaining predetermined length is a shape retention hose, for example. When the length in a water circulation state of the hose storage space in the housing is 30 m, for example, the length in a non-water circulation state is 15 m, for example, which is a half. The depth of the fire hydrant device can be reduced by half, for example, when the hose storage space in the housing is reduced by half.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present invention relates to a fire hydrant device in which a fire hose with a nozzle attached to the tip is stored in a casing so that it can be freely pulled out. [Background technology]

[0002] Conventionally, tunnel fire hydrant devices installed in tunnels on expressways, motorways, and the like have housed a hose with a nozzle at the end and valves inside a housing with a fire hydrant door that can be opened or closed. In the event of a fire, an operator opens the fire hydrant door, holds the nozzle and pulls the hose out of the housing, then opens the fire hydrant valve to put out the fire.

[0003] Tunnel fire hydrant devices are installed on the walls of the guard passage at 50m intervals along the length of the tunnel along the road, and because shape-retaining hoses are used for the fire hoses, the length of the fire hoses is set at 30m, making it possible to cover the protection range on both the left and right sides. This assumes that if a fire breaks out near the fire hydrant devices installed at 50m intervals along the length of the tunnel, and the nearest fire hydrant device cannot be used for firefighting work, the worst case scenario is that the adjacent fire hydrant device will be used, and for this reason the effective length of the fire hose pulled out from the fire hydrant device is set at 30m, and the nozzle water discharge range is set at 20m, so that the entire protection range can be covered (Patent Documents 1, 2).

[0004] By the way, the hoses used in fire hydrant devices are required to be long, for example 30 m, and the size of the casing depends on the space needed to store the hose. Therefore, when a shape-retaining hose is used, it is inevitable that storage space must be provided for the large hose, which makes the fire hydrant device larger. This leaves room for improvement in terms of ease of use, ease of installation, and resource conservation.

[0005] In particular, in cases where the structure of the tunnel body makes it impossible to form a fire hydrant box cutout on the tunnel wall, a fire hydrant device will be installed in the guard passage, for example. In this case, however, in order to ensure the width of the guard passage, it is necessary to make the depth of the fire hydrant device as small as possible, so it is desirable to make the fire hydrant device thinner.

[0006] To solve this problem, a retractable hose has been proposed for use in a fire hydrant device, which shrinks to a specified length when in a non-water-flowing state and expands to the required length when water is being supplied and the hose is in a water-flowing state (Patent Document 3). [Prior art documents] [Patent documents]

[0007] [Patent Document 1] JP 2016-055073 A [Patent Document 2] JP 2018-139704 A [Patent Document 3] JP 2015-012881 A Summary of the Invention [Problem to be solved by the invention]

[0008] However, when such an elastic hose, which expands when water is passing through it, is stored in a contracted state inside the housing of a fire hydrant device, in the same conventional hose storage structure in which a shape-retaining hose of fixed length is wound inward multiple times, when the hose is pulled out while water is passing through it, the hose stretches and the hose stored in an inwardly wound state is pressed firmly into the storage section, requiring a greater pulling force than for a shape-retaining hose, which may reduce operability.

[0009] In addition, when an expandable hose is allowed to flow through it, the hose may stretch and be pushed outside the fire hydrant device, causing it to become disintegrated. Even in the case of a nearby fire where only a small amount of hose needs to be pulled out, the hose may be pushed out more than necessary, making it difficult to handle.

[0010] An object of the present invention is to provide a fire hydrant device using a fire hose that can achieve both reduction in hose storage space and ease of hose pull-out operation. [Means for solving the problem]

[0011] (Fire hydrant device 1) The present invention is a fire hydrant device in which a fire hose with a nozzle attached to the tip is stored in a housing so that it can be freely pulled out, The fire hose is characterized in that a portion of the tip end side is an elastic hose and the remaining portion is a non-elastic hose.

[0012] The fire hose is made by splitting an elastic hose and connecting it to a non-elastic hose.

[0013] (Fire hydrant device 2) The present invention is a fire hydrant device in which a fire hose with a nozzle attached to the tip is stored in a housing so that it can be freely pulled out, The fire hose is characterized in that a portion of the hose is a non-elastic hose and the remaining portion is an elastic hose, and the non-elastic hose is divided and connected to the elastic hose.

[0014] (Fire hydrant 3) The present invention is a fire hydrant device in which a fire hose with a nozzle attached to the tip is stored in a housing so that it can be freely pulled out, The fire hose is characterized in that a part of the hose is an elastic hose and the remaining part is a non-elastic hose, and both the elastic hose and the non-elastic hose are divided and alternately connected. Effect of the Invention

[0015] (Effects of fire hydrant devices) According to the fire hydrant device of the present invention, part of the fire hose is made into an elastic hose that expands when water is passed through it, and the remaining part is made into a non-elastic hose of a fixed length. This shortens the length of the elastic hose when water is not passing through it, thereby reducing the space required to store the hose. This makes it possible to make the fire hydrant device thinner and more compact, thereby improving ease of use and ease of installation.

[0016] In addition, by using an elastic hose on the nozzle side of the hose tip and a non-elastic hose such as a shape-retaining hose on the base side of the hose opposite the nozzle side, the non-elastic hose on the base side of the hose does not stretch when water is passing through, so the hose storage state is stable and the hose can be pulled out smoothly without coming apart. Also, the elastic hose on the nozzle side stretches when water is passing through, assisting the hose pull-out force, reducing the hose pull-out force and improving operability.

[0017] (Effect of hose length setting for non-elastic hose and elastic hose) In addition, in the case of a tunnel fire hydrant device, for example, the hose length of the fire hose in a non-water-passing state is set as a first set length (L1) = 15 m, and the hose length of the fire hose in a water-passing state is set as a second set length (L2) = 30 m longer than the first set length (L1), and the extension ratio of the elastic hose is set to a predetermined set ratio (K), for example, 2.5 times, the hose length (L3) of the non-elastic hose is L3 = (L2 - K L1) / (1 - K) =(30-2.5×15) / (1-2.5) =5m The length of the elastic hose when water is not passing through it (L4) is calculated as follows: L4=L1-L3=15-5=10m It is possible to obtain and concatenate the above.

[0018] (Effect of calculating hose length when elastic hose is not passing water) In addition, under the same conditions of (L1) = 15 m, (L2) = 30 m, and (K) = 2.5, the hose length (L4) of the elastic hose in a non-water-passing state is L4 = (L2 - L1) / (K - 1) =(30-15) / (2.5-1) =10m The hose length (L3) of the non-elastic hose is calculated as follows: L3=L1-L4=15-10=5m It is also possible to obtain and concatenate the above.

[0019] (Effect of setting the stretch ratio of the elastic hose) In addition, in the case of a fire hydrant device for a tunnel, for example, if the hose length of the fire hose in a non-water-passing state is a first set length (L1) = 15 m, the hose length of the fire hose in a water-passing state is a second set length (L2) = 30 m longer than the first set length (L1), the hose length of the non-elastic hose is a third predetermined length (L3) = 5 m, and the hose length of the elastic hose in a non-water-passing state is a fourth set length (L4) = 10 m, the extension ratio (K) of the elastic hose is determined based on the second to fourth set lengths (L2, L3, L4). K=(L2-L3) / L4 =(30-5) / 10 =2.5 and prepare a 10m long elastic hose with an elongation ratio K of 2.5 times so that it can be connected to a 5m long non-elastic hose. [Brief description of the drawings]

[0020] [Figure 1] FIG. 2 is an explanatory diagram showing a fire hydrant device for a tunnel. [Diagram 2] This is an explanatory diagram showing the internal structure of the fire hydrant device from the front with the fire hydrant door open. [Diagram 3] FIG. 2 is an explanatory diagram showing the internal structure of the fire hydrant device from a plan view. [Figure 4] FIG. 2 is an explanatory diagram showing a cross section of a fire hydrant device as viewed from the side. [Diagram 5] 1A and 1B are explanatory diagrams showing an embodiment of a fire hose in a water-non-passing state and a water-passing state. [Figure 6] FIG. 1 is an explanatory diagram showing a specific embodiment of a fire hose in which a non-elastic hose is set to 5 m and a non-water-permeable elastic hose is set to 10 m. [Figure 7] FIG. 13 is an explanatory diagram showing a specific embodiment of a fire hose in which a non-elastic hose is set to 7.5 m and a non-water-permeable elastic hose is set to 7.5 m. [Figure 8] FIG. 1 is an explanatory diagram showing a specific embodiment of a fire hose in which a non-elastic hose is set to 10 m and a non-water-permeable elastic hose is set to 5 m. [Figure 9] FIG. 1 is an explanatory diagram showing an embodiment of a fire hydrant device using a fire hose in which an elastic hose is divided and connected to a non-elastic hose. [Figure 10] FIG. 1 is an explanatory diagram showing an embodiment of a fire hydrant device using a fire hose in which a non-elastic hose is divided and connected to an elastic hose. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of a fire hydrant device according to the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the following embodiment.

[0022] [Basic Concept of the Embodiment] First, the basic concept of the embodiment will be described. The embodiment is generally a fire hydrant device that stores a fire hose with a nozzle attached to the tip in a housing so that it can be freely pulled out, and the fire hose is a part that is an elastic hose and the remaining part that is a non-elastic hose, and typically, a predetermined length on the nozzle side is an elastic hose and the remaining predetermined length on the opposite side to the nozzle is a non-elastic hose.

[0023] Here, the term "elastic hose" refers to a hose that is contracted to a predetermined length in a non-water-passing state and expands in the longitudinal direction in a water-passing state. The term "non-elastic hose" refers to a hose that does not expand or contract and whose length does not change between a non-water-passing state and a water-passing state, and is a concept that includes, for example, a shape-retaining hose that maintains a predetermined inner diameter and outer shape and hardly expands or contracts. Therefore, the fire hose of this embodiment can be said to be a composite hose in which a non-elastic hose and an elastic hose are connected and the hose as a whole expands in a water-passing state.

[0024] In the case of a fire hydrant for tunnels, the hose length of the fire hose in the water-passing state is, for example, 30 m, but in the fire hose of this embodiment in which the non-stretchable hose and the stretchable hose are connected, the hose length in the water-passing state is, for example, half that, 15 m, and therefore the hose storage space of the fire hydrant can be reduced to about half that of a conventional non-stretchable fire hose with a hose length of 30 m. If the hose storage space can be reduced by half in this way, for example, the width in the depth direction of the fire hydrant can be reduced to half that of a conventional device, and the fire hydrant can be made thinner, which greatly improves the ease of installation.

[0025] In a fire hydrant device using a fire hose in which a non-elastic hose and an elastic hose are connected, the hose length (L1) of the fire hose in a non-water-passing state, the hose length (L2) that expands in a water-passing state, and the expansion ratio (K) of the elastic hose are predetermined, so the hose length (L3) of the non-elastic hose and the hose length (L4) of the elastic hose in a non-water-passing state are calculated based on these, and then the hoses are connected. Note that the "expansion ratio" is the value obtained by dividing the hose length of the elastic hose expanded in a water-passing state by the hose length of the elastic hose contracted in a non-water-passing state.

[0026] Here, between each of the hose lengths L1, L2, L3, and L4, L1=L3+L4 L2=L3+K L4 For example, the hose length (L3) of a non-elastic hose is L3 = (L2 - K L1) / (1 - K) The length of the elastic hose when water is not passing through it (L4) is calculated as follows: L4=L1-L3 The above is calculated and concatenated.

[0027] In addition, the hose length (L4) of the elastic hose when water is not passing through it is L4 = (L2 - L1) / (K - 1) The hose length (L3) of the non-elastic hose is calculated as follows: L3=L1-L4 and concatenated as follows.

[0028] In addition, when the hose lengths L1, L2, L3, and L4 are preset, it is necessary to determine the stretch ratio K of the elastic hose to be used. In this case, the stretch ratio (K) of the elastic hose is K=(L2-L3) / L4 The stretchable hose having the hose length L4 and this stretch ratio is connected to a non-stretchable hose having the hose length L3 to form the water discharge hose of this embodiment.

[0029] A specific embodiment will be described below. In the specific embodiment shown below, a case will be described in which the "fire hydrant device" is a "fire hydrant device for a tunnel", the "hose length L1 of the fire hose in a non-water-passing state" is "L1 = 15 m", and the "hose length L2 of the fire hose extended in a water-passing state" is "L2 = 30 m".

[0030] [Specific details of the embodiment] The detailed contents of the fire hydrant equipment will be explained as follows: a. Fire hydrant equipment b. Internal structure of the fire hydrant device c. Elastic hose d. Hose length of non-stretchable hose and stretchable hose e. Example of fire hose 1 f. Example 2 of fire hose g. Specific example 3 of fire hose h. Split connection of non-elastic hose and elastic hose i. Variations of the Invention

[0031] [a. Fire hydrant equipment] The fire hydrant device will be described in more detail. As shown in FIG. 1, the fire hydrant device 10 is divided into a casing 10a on the fire hydrant side and a casing 10b on the fire extinguisher side, and decorative frames 11a and 11b are attached to the front of the casings 10a and 10b, and is installed on a stand 15. Here, in the explanation of FIG. 1, the XYZ directions are mutually perpendicular directions, specifically, the X direction is the left-right direction, the Y direction is the up-down direction, and the Z direction is the front-rear direction (depth direction). In the X direction, +X is the right, -X is the left, and in the Y direction, +Y is the up, and -Y is the down. Furthermore, in the Z direction, +Z is the back (tunnel wall side or guard passage side when installed), and -Z is the front (road side when installed). This point is the same in FIG. 2 to FIG. 4 showing the internal structure of the fire hydrant device 10.

[0032] The door opening of the decorative frame 11a on the fire hydrant side is divided into upper and lower parts, with a forward-tilting fire hydrant door (lower door) 12 that opens downward on hinges 12a being located in the lower door opening, and a maintenance door (upper door) 14 that opens upward on hinges 14a being located in the upper door opening, with a hose with a nozzle and valves including a fire hydrant valve being stored inside.

[0033] A fire extinguisher door 18 that opens to the left on hinges 18a is provided on the left side of the door opening of the decorative frame 11b on the fire extinguisher side, and two fire extinguishers can be stored inside. In addition, a sight window 19 is provided on the lower side of the fire extinguisher door 18, so that it is possible to check from the outside whether the fire extinguisher is stored or not.

[0034] An electrical equipment panel 22 is provided on the right side of the door opening of the decorative frame 11b on the fire extinguisher side, with a door structure that opens sideways to the right on a hinge 22a. The electrical equipment panel 22 is provided with a red indicator light 24, a transmitter 25, and a response lamp 26 as electrical equipment, and a telephone jack (not shown) is provided inside the electrical equipment panel 22.

[0035] The red indicator light 24 is always on, allowing the location of the fire hydrant device 10 to be known from a distance. In the event of a fire, when the transmitter 24 is pressed and the push button switch is turned on, a transmission signal is sent to the disaster prevention receiving panel in the monitoring room and a fire alarm is issued. In response to this, a response signal is sent from the disaster prevention receiving panel, causing the red indicator light 24 to flash and the response lamp 26 to light up.

[0036] [b. Internal structure of a fire hydrant device] The internal structure of the fire hydrant device will be described in more detail below. As shown in Figures 2 to 4, the inside of the housing 11a which serves as the fire hydrant storage section 16 is divided into a valve storage section 16a and a hose storage section 16b.

[0037] A water supply pipe 28 is drawn into the valve storage section 16a from the outside and connected to a water supply hydrant 30. The water supply pipe 28 branches downward, and a fire hydrant valve 32 and an automatic pressure adjusting valve 33 are provided, followed by a fire hose 20. The fire hydrant valve 32 is opened and closed by a fire hydrant valve opening / closing lever 34 provided on the fire hydrant door 12. When the fire hydrant valve opening / closing lever 34 is opened and closed, the fire hydrant valve 32 is remotely opened and closed by a known wire link mechanism. When the fire hydrant valve opening / closing lever 34 is opened and closed, a fire hydrant valve opening / closing detection switch provided on the lever operation box is turned on and off. A pump start switch 42 used by the fire brigade is provided on the upper right of the water supply hydrant 30.

[0038] A hose storage frame 35 is provided in the hose storage section 16b, and the fire hose 20 connected to the water supply pipe on the lower right side is stored in the frame by being wound inward in a clockwise direction. A nozzle 38 is attached to the tip of the fire hose 20 pulled out through a hose guide 36, and the nozzle 38 is held in a detachable manner by a nozzle holder 40.

[0039] The fire hose 20 is a composite hose in which the nozzle 38 side is an elastic hose with a predetermined set length L4, and the base side of the hose connected to the water supply pipe from the valves storage section 16a on the opposite side to the nozzle 38 is a non-elastic hose, for example a shape-retaining hose, with the two being connected together. In this embodiment, the hose length of the fire hose 20 in a non-water-passing state in which a non-elastic hose and an elastic hose are connected together is a first set length L1 = 15 m, which is half the conventional hose length of 30 m.

[0040] 3 and 4, the depth-direction width W1 of the hose storage section 16b that stores the fire hose 20 of this embodiment can be reduced to approximately half the depth-direction width W2 of the hose storage section in the conventional fire hydrant device 100 that stores a fire hose with a hose length of 30 m, and the fire hydrant device 10 is significantly made thinner. Here, two fire extinguishers 39 are stored inside the housing 10b of the fire hydrant device 10 (inside the fire extinguisher door 18) as shown in FIG. 3, and the depth-direction width W1 of the fire hydrant device 10 must be a width that can store at least the fire extinguishers 39, and based on this, the depth-direction width W1 of the hose storage section 16b can be reduced to approximately 15 cm.

[0041] [c. Elastic hose] A more detailed explanation will be given of the elastic hose that forms the nozzle side of the fire hose 20. The elastic hose is contracted to a predetermined set length when water does not pass through it, and expands in the longitudinal direction when water passes through it. The hose structure is arbitrary, but for example, it has a two-layer structure with a watertight layer provided on the water-passing surface that comes into direct contact with water, and a cover layer provided on the outside of the watertight layer.

[0042] The watertight layer is made of a material that is stretchable and contractable with a specified elongation ratio K and that does not allow water to pass through. The material that forms the watertight layer is made of synthetic rubber or a specified synthetic resin that has a specified elongation ratio K that stretches at least 1.5 to 8 times when 1 MPa of fire water flows through it, assuming that the length in an unloaded state is 1, in the case of a tunnel fire hydrant device as an example.

[0043] The cover layer is attached to the outside of the watertight layer by being stuck to it or in close contact with it, and is made of a material that is flexible with an elongation rate equal to or less than that of the watertight layer and has the strength to withstand the water pressure of 1 MPa of fire water. The cover layer is made of a material that has low friction and abrasion resistance to withstand rubbing, since it rubs against the road surface when the fire hose 10 is pulled out as a tunnel fire hydrant.

[0044] The material forming the cover layer is a specified fiber or a specified synthetic resin having an elongation ratio K of 1.5 to 8 times or less in a water-permeable state. When a fiber is used for the cover layer, the cover layer has a knitted structure with warp threads and weft threads having an elongation ratio K of 1.5 to 8 times or less in a water-permeable state, and the weft threads are spiral. As the fiber constituting the cover layer having a knitted structure, for example, synthetic spider silk can be used. As such synthetic spider silk, the product name "Spiver (registered trademark)" manufactured by Spiber Co., Ltd. can be used.

[0045] [d. Hose length of non-stretchable hose and stretchable hose] The hose lengths of the non-elastic hose and the elastic hose constituting the fire hose 20 of this embodiment will be described in more detail.

[0046] FIG. 5(A) shows the fire hose 20 in a non-water-passing state pulled out linearly from the hose storage section 16b of the fire hydrant device 10, and FIG. 5(B) shows the fire hose 20 in an extended state with water passing through it.

[0047] As shown in FIG. 5(A), the fire hose 20 in a non-water-passing state is formed by connecting a non-elastic hose 46 and an elastic hose 48. If the hose length of the fire hose 20 in a non-water-passing state is a first set length L1, and as shown in FIG. 5(B), the hose length of the fire hose 20 in a water-passing state is a second set length L2, and the extension ratio of the elastic hose 48 is a predetermined set ratio K, then the hose length L3 of the non-elastic hose 46 and the hose length L4 of the elastic hose 48 in a non-water-passing state are calculated based on the first and second set lengths L1, L2 and the set ratio K, and then the hoses are connected.

[0048] Here, between the hose lengths (L1, L2, L3, L4) L1=L3+L4 L2=l3+K L4 Since the above relationship exists, the hose lengths L1, l2 and the elongation ratio K are constants, and the hose length L3 of the non-elastic hose 46 is a variable, L3 = (L2 - K L1) / (1 - K) (Equation 1) The hose length L4 of the elastic hose 48 in a non-water-passing state is L4=L1-L3 It is calculated as:

[0049] In addition, when the hose length L4 of the elastic hose 48 in a non-water-passing state is used as a variable, L4=(L2-L1) / (K-1) (Formula 2) The hose length L3 of the non-elastic hose can be calculated as follows: L3=L1-L4 It is calculated as:

[0050] Another procedure for setting the fire hose 20 in which the non-elastic hose 46 and the elastic hose 48 are connected is to preset the set lengths L1, L2, L3, and L4 of each hose as constants, determine the extension ratio K of the elastic hose 48 that satisfies the set hose lengths as a variable, and select the elastic hose 48 with the determined extension ratio K. In this case, the extension ratio K of the elastic hose 48 is K=(L2-L3) / L4 (Formula 3) It can be calculated as:

[0051] [e. Example of fire hose 1] Fig. 6 shows a specific example of a fire hose 20 using an elastic hose 48 with an extension ratio K = 2.5, Fig. 6(A) shows a non-water-passing state, and Fig. 6(B) shows a water-passing state. Here, the first set length L1 of the fire hose 20 in the non-water-passing state is 15m, the second set length L2 extended in the water-passing state is 30m, and the extension ratio K is a constant of 2.5.

[0052] In this case, the third set length L3 of the non-elastic hose 46 is calculated from the above (Equation 1) as follows: L3 = (L2 - K L1) / (1 - K) =(30-2.5×15) / (1-2.5) =5m The fourth set length L4 of the elastic hose 48 is L4=L1-L3=15-5=10m That is, in a non-water-passing state, the ratio of the hose length of the non-elastic hose 46 to the elastic hose 48 is (1:2).

[0053] On the other hand, from the above (Equation 2), the fourth set length L4 of the elastic hose 48 is L4 = (L2 - L1) / (K - 1) =(30-15) / (2.5-1) =10m The third set length L3 of the non-elastic hose 46 is calculated. L3=L1-L4=15-10=5m It may be calculated as:

[0054] In addition, the first to fourth set values ​​L1, L2, L3, and L4 of each hose are L1=15m L2=30m L3=5m L4=10m In the case where the extension ratio K of the elastic hose 48 is preset as a constant, the extension ratio K of the elastic hose 48, which is a variable, is calculated based on the above (Equation 3). K=(L2-L3) / L4 =(30-5) / 10 =2.5 Then, an elastic hose with an elongation ratio K=2.5 is selected to manufacture the fire hose 20.

[0055] [f. Specific example 2 of fire hose] FIG. 7 shows another specific example of a fire hose 20 using an elastic hose 48 with an extension ratio K=3.0, where FIG. 7(A) shows a non-water-passing state and FIG. 7(B) shows a water-passing state.

[0056] Here, since L1=15 m, L2=30 m, and K=3.0, the third set length (L3) of the non-elastic hose 46 is calculated from the above (Equation 1). L3 = (L2 - K L1) / (1 - K) =(30-3.0×15) / (1-3.0) =7.5m The fourth set length L4 of the elastic hose 48 is L4=L1-L3=15-7.5=7.5m That is, in a non-water-passing state, the ratio of the hose length of the non-elastic hose 46 to the elastic hose 48 is (1:1).

[0057] On the other hand, from the above (Equation 2), the fourth set length L4 of the elastic hose 48 is L4 = (L2 - L1) / (K - 1) =(30-15) / (3.0-1) =7.5m The third set length L3 of the non-elastic hose 46 is calculated. L3=L1-L4=15-7.5=7.5m It may be calculated as:

[0058] In addition, the first to fourth set values ​​L1, L2, L3, and L4 of each hose are L1=15m L2=30m L3=7.5m L4=7.5m In the case where the extension ratio K of the elastic hose 48 is preset as a constant, the extension ratio K of the elastic hose 48, which is a variable, is calculated based on the above (Equation 3). K=(L2-L3) / L4 =(30-7.5) / 7.5 =3.0 Then, an elastic hose with an extension ratio K=3.0 is selected to manufacture the fire hose 20.

[0059] [g. Specific example of fire hose 3] FIG. 8 shows another specific example of a fire hose 20 using an elastic hose 48 with an extension ratio K=4.0, where FIG. 8(A) shows a non-water-passing state and FIG. 8(B) shows a water-passing state.

[0060] Here, since L1=15 m, L2=30 m, and K=4.0, the third set length L3 of the non-elastic hose 46 is calculated from the above (Equation 1). L3 = (L2 - K L1) / (1 - K) =(30-4.0×15) / (1-4.0) =10m The fourth set length L4 of the elastic hose 48 is L4=L1-L3=15-10=5m That is, in a non-water-passing state, the ratio of the hose length of the non-elastic hose 46 to the elastic hose 48 is (2:1).

[0061] On the other hand, from the above (Equation 2), the fourth set length L4 of the elastic hose 48 is L4 = (L2 - L1) / (K - 1) =(30-15) / (4.0-1) =5m The third set length L3 of the non-elastic hose 46 is calculated. L3=L1-L4=15-5=10m It may be calculated as:

[0062] In addition, the first to fourth set values ​​L1, L2, L3, and L4 of each hose are L1=15m L2=30m L3=10m L4=5m In the case where the extension ratio K of the elastic hose 48 is preset as a constant, the extension ratio K of the elastic hose 48, which is a variable, is calculated based on the above (Equation 3). K=(L2-L3) / L4 =(30-10) / 5 =4.0 Then, an elastic hose with an extension ratio K=4.0 is selected to manufacture the fire hose 20.

[0063] The above specific examples 1 to 3 are merely examples, and as necessary, the hose lengths L1, L2 and the elongation ratio K can be set as arbitrary constants to determine the hose lengths L3, L4 as variables, or the hose lengths L1, L2, L3, L4 can be set as constants to determine the elongation ratio K as a variable.

[0064] [h. Separate connection of non-elastic hose and elastic hose] A fire hose in which either a non-elastic hose or an elastic hose is divided and connected to the other will be described in more detail. Such a fire hose is one form of a fire hose in which one part is an elastic hose and the remaining part is a non-elastic hose.

[0065] FIG. 9 shows an embodiment of a fire hydrant device that uses a fire hose in which an elastic hose is divided and connected to a non-elastic hose. FIG. 9(A) shows the non-water-passing state, and FIG. 9(B) shows the water-passing state.

[0066] Here, the first set length L1 of the fire hose 20 in a non-water-passing state is 15 m, the second set length L2 extended in a water-passing state is 30 m, and the extension ratio K of the elastic hose 48 is a constant of 2.5. The hose length of the non-elastic hose 46 is, for example, 5 m, and elastic hoses 48a and 48b divided into 5 m lengths are connected to both sides of the non-elastic hose 46, the hose end of the elastic hose 48a is connected to the water supply pipe of the hose storage section 16b of the fire hydrant device 10, and the nozzle 38 is attached to the tip of the elastic hose 48b.

[0067] When water is passed through the fire hose 20 having elastic hoses 48a, 48b connected to both sides of such a non-elastic hose 46, as shown in Figure 9 (B), the elastic hoses 48a, 48b each extend to 12.5 m corresponding to the extension ratio K = 2.5, and water is discharged from the nozzle 38 with the overall hose length L2 extended to 30 m.

[0068] When elastic hose 48a is connected to a water supply pipe and stored in hose storage section 16b, when water is flowing, elastic hose 48a stretches, causing the base of the hose to be pressed strongly against the inside of hose storage section 16b, which may increase the pulling force at this part; however, elastic hose 48b stretches, pushing the nozzle 38 side out of hose storage section 16b, making it possible to smoothly pull out at least up to non-elastic hose 46.

[0069] FIG. 10 shows another embodiment of a fire hydrant device using a fire hose in which a non-elastic hose is divided and connected to an elastic hose, and FIG. 10(A) shows the non-water-passing state, and FIG. 10(B) shows the water-passing state.

[0070] Here, the first set length L1 of the fire hose 20 in a non-water-passing state is 15 m, the second set length L2 extended in a water-passing state is 30 m, and the extension ratio K of the elastic hose 48 is a constant of 4.0. The elastic hose 48 has a hose length of, for example, 5 m, and non-elastic hoses 46a and 46b, each divided into 5 m, are connected to both sides of the elastic hose 48. The hose end of the non-elastic hose 46a is connected to the water supply pipe of the hose storage section 16b of the fire hydrant device 10, and the nozzle 38 is attached to the tip of the non-elastic hose 46b.

[0071] When water is passed through the fire hose 20 having non-elastic hoses 46a, 46b connected to both sides of such an elastic hose 48, the elastic hose 48 stretches to 20 m corresponding to the extension ratio K = 4.0, as shown in Figure 10 (B), and water is discharged from the nozzle 38 with the overall hose length L2 stretched to 30 m.

[0072] 9 and 10 show an example of a fire hose in which either a non-elastic hose or an elastic hose is divided and connected to the other, but is not limited thereto and includes fire hoses in which the ratio of the hose length of the two hoses and the extension ratio of the elastic hose are arbitrarily determined as necessary. Also, in addition to dividing either a non-elastic hose or an elastic hose, it includes fire hoses in which both are divided and alternately connected.

[0073] [i. Modifications of the present invention] Modifications of the in-vehicle information display device according to the present invention will be described in more detail. In addition to the above-described embodiment, the fire hydrant device of the present invention includes the following modifications.

[0074] (Fire hydrant equipment) The above embodiment takes a fire hydrant device for a tunnel as an example, but is not limited to this and may include any other device, such as an indoor fire hydrant housing a hose with a nozzle, an outdoor fire hydrant, a hose storage box, a fire pump truck, etc.

[0075] (others) Furthermore, the present invention includes appropriate modifications that do not impair the objects and advantages of the present invention, and is not limited to the numerical values ​​shown in the above embodiment. [Explanation of symbols]

[0076] 10: Fire hydrant equipment 10a, 10b: Housing 11a, 11b: Decorative frame 12: Fire hydrant door 14: Maintenance door 15: Stand 16: Fire hydrant storage area 16a: Valve storage section 16b: Hose storage section 18: Fire extinguisher door 20: Fire hose 22: Electrical panel 24: Red indicator light 25: Transmitter 26: Answer lamp 28: Water supply pipe 30: Water tap 32: Fire hydrant valve 33: Automatic pressure regulating valve 34: Fire hydrant valve opening / closing lever 35: Hose storage frame 36: Hose guide 38: Nozzle 39: Fire extinguisher 40: Nozzle holder 42: Pump start switch 46, 46a, 46b: Non-stretchable hose 48, 48a, 48b: Elastic hose

Claims

1. A fire hydrant device in which a fire hose with a nozzle attached to the tip is freely pulled out and stored in a housing, The fire hose is characterized in that a portion of the tip side of the fire hose is an elastic hose and the remaining portion is a non-elastic hose.

2. The fire hydrant device according to claim 1, The fire hose is a fire hydrant device characterized in that the elastic hose is divided and connected to the non-elastic hose.

3. A fire hydrant device in which a fire hose with a nozzle attached to the tip is freely pulled out and stored in a housing, The fire hose is characterized in that a portion of the fire hose is a non-elastic hose and the remaining portion is an elastic hose, and the non-elastic hose is divided and connected to the elastic hose.

4. A fire hydrant device in which a fire hose with a nozzle attached to the tip is freely pulled out and stored in a housing, The fire hose is characterized in that a portion of the fire hose is an elastic hose and the remaining portion is a non-elastic hose, and both the elastic hose and the non-elastic hose are divided and connected alternately.

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