Fire hydrant equipment

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 that stores a fire hose with a nozzle attached to the tip in a housing so that it can be freely pulled out. [Background technology]

[0002] Conventionally, tunnel fire hydrant devices installed in tunnels on expressways, motorways, and other roads house a hose with a nozzle attached to the end and various valves in a housing with a fire hydrant door that can be opened and closed.In the event of a fire, a worker opens the fire hydrant door, pulls the hose out of the housing by holding the nozzle, and opens the fire hydrant valve to put out the fire.

[0003] Tunnel fire hydrant devices are installed on the walls of the guard passageways at 50m intervals along the length of the tunnel, following the road, and because shape-retaining hoses are used for the fire hoses, the length of the hoses is set to 30m, allowing them to cover the protective area on both the left and right sides. This is based on the assumption that if a fire breaks out near the fire hydrant devices installed at 50m intervals along the length of the tunnel, the nearest fire hydrant device cannot be used for firefighting operations, and the worst-case scenario is to use the adjacent fire hydrant device, so the effective length of the fire hose pulled out from the fire hydrant device is set to 30m, and the nozzle water discharge range is set to 20m, allowing the entire protective area to be covered (Patent Documents 1 and 2).

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

[0005] In particular, when the structure of the tunnel body makes it impossible to form a fire hydrant box cutout on the tunnel wall, the fire hydrant device will be installed in the guard passage, for example.In this case, 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 fire hydrant devices. The hose contracts to a predetermined length when not discharging water and is 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] Japanese Patent Application Laid-Open No. 2016-055073 [Patent Document 2] Japanese Patent Application Publication No. 2018-139704 [Patent Document 3] Japanese Patent Application Laid-Open No. 2015-012881 Summary of the Invention [Problem to be solved by the invention]

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

[0009] Furthermore, when an expandable hose is allowed to flow with water, the hose may stretch and be pushed out of the fire hydrant device, causing it to become loose. This can cause the hose to be pushed out more than necessary, even in the case of a nearby fire where only a small amount of hose needs to be pulled out, 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 a reduction in hose storage space and ease of hose withdrawal. [Means for solving the problem]

[0011] (Fire hydrant device 1) The present invention is 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, The fire hose is characterized in that a part of the tip end is an elastic hose and the remaining part 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 that stores a fire hose with a nozzle attached to the tip 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 device 3) The present invention is 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, The fire hose is characterized in that a part of the hose is an elastic hose and the other part is a non-elastic hose, and both the elastic hose and the non-elastic hose are divided and connected alternately. [Effects of the Invention]

[0015] (Effect of fire hydrant devices) According to the fire hydrant device of the present invention, part of the fire hose is made of an elastic hose that expands when water is passed through it, and the remaining part is made of 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 hose storage space required and making it possible to make the fire hydrant device thinner and more compact, thereby improving ease of use and 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 flowing, so the hose remains stable when stored and can be pulled out smoothly without coming undone. Also, the elastic hose on the nozzle side stretches when water is flowing, assisting the hose pull-out force and reducing the hose pull-out force, making it easier to operate.

[0017] (Effect of hose length settings for non-elastic hose and elastic hose) In addition, in the case of a tunnel fire hydrant device, for example, if 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, which is 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, then 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 (L4) is calculated as follows: L4=L1-L3=15-5=10m It is possible to calculate and concatenate them as follows.

[0018] (Effect of calculating the hose length when the 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 the 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 calculate and concatenate them as follows.

[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 set as a first set length (L1) = 15 m, the hose length of the fire hose in a water-passing state is set as a second set length (L2) = 30 m which is longer than the first set length (L1), the hose length of the non-elastic hose is set as a third predetermined length (L3) = 5 m, and the hose length of the elastic hose in a non-water-passing state is set as 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 A 10m long elastic hose with an elongation ratio K of 2.5 times can be prepared and connected to a 5m non-elastic hose. [Brief explanation of the drawings]

[0020] [Figure 1] FIG. 1 is an explanatory diagram showing a fire hydrant device for a tunnel. [Figure 2] This is an explanatory diagram showing the internal structure of the fire hydrant device from the front with the fire hydrant door open. [Figure 3] FIG. 2 is an explanatory diagram showing the internal structure of the fire hydrant device from above. [Figure 4] FIG. 2 is an explanatory diagram showing a cross section of the fire hydrant device as seen from the side. [Figure 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. 10 is an explanatory diagram showing a specific embodiment of a fire hose in which the non-elastic hose is set to 5 m and the non-water-permeable elastic hose is set to 10 m. [Figure 7] FIG. 10 is an explanatory diagram showing a specific embodiment of a fire hose in which the non-elastic hose is set to 7.5 m and the non-water-permeable elastic hose is set to 7.5 m. [Figure 8] FIG. 10 is an explanatory diagram showing a specific embodiment of a fire hose in which the non-elastic hose is set to 10 m and the non-water-permeable elastic hose is set to 5 m. [Figure 9] FIG. 10 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. 10 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 INVENTION

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

[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 partly elastic and partly non-elastic, and typically, a predetermined length on the nozzle side is elastic and the remaining predetermined length on the opposite side to the nozzle is non-elastic.

[0023] Here, an "elastic hose" refers to a hose that contracts to a predetermined length when water is not passing through it and expands longitudinally when water is passing through it. A "non-elastic hose" refers to a hose that does not expand or contract and whose length does not change between the non-water-passing state and the 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 barely 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 when water is passing through it.

[0024] In the case of a fire hydrant device for tunnels, the hose length when water is flowing is, for example, 30 m, but in the fire hose of this embodiment, in which a non-elastic hose and an elastic hose are connected, the hose length when water is not flowing is, for example, half that, 15 m, which makes it possible to reduce the hose storage space of the fire hydrant device to about half that of a conventional non-elastic 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 device can be reduced to half that of a conventional device, and by making the fire hydrant device thinner, it is possible to greatly improve installation ease.

[0025] In addition, 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) when water is passing through, and the extension 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 "extension ratio" is the hose length of the elastic hose extended in a water-passing state divided by the hose length of the elastic hose contracted in a water-passing state.

[0026] Here, between each hose length L1, L2, L3, L4, L1=L3+L4 L2=L3+K L4 Therefore, 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 (L4) is calculated as follows: L4=L1-L3 The above equations are then calculated and concatenated.

[0027] In addition, the hose length (L4) when the elastic hose is not passing water 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 extension ratio K of the elastic hose to be used. In this case, the extension ratio (K) of the elastic hose is K=(L2-L3) / L4 The stretchable hose having the extension ratio of L4 and a hose length of L3 is connected to a non-stretchable hose having a hose length of 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 water-non-flowing state" is "L1 = 15 m," and the "hose length L2 of the fire hose extended in a water-flowing state" is "L2 = 30 m."

[0030] [Specific details of the embodiment] The details of the fire hydrant equipment will be explained below. 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 a fire hose 1 f. Example 2 of a fire hose g. Example 3 of a fire hose h. Split connection of non-stretchable hose and stretchable hose i. Modifications of the present 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 has a structure divided into a hydrant-side housing 10a and a fire extinguisher-side housing 10b. Decorative frames 11a and 11b are attached to the front of the housings 10a and 10b, and the device is installed on a stand 15. In the description of FIG. 1, the X, Y, and Z directions are mutually orthogonal 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-to-back 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 rear (the tunnel wall side or the guard passage side when installed), and -Z is the front (the road side when installed). This also applies to FIGS. 2 to 4, which show 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 halves, with a forward-leaning fire hydrant door (lower door) 12 that opens downwards on hinges 12a located in the lower door opening, and a maintenance door (upper door) 14 that opens upwards on hinges 14a located in the upper door opening, with a storage area inside for hoses with nozzles and valves including a fire hydrant valve.

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

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

[0035] The red indicator light 24 is always lit, 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, issuing a fire alarm, and in response, 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 the 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 interior of the housing 11a that 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 hydrant 30. The water supply pipe 28 also branches downward, and is provided with a fire hydrant valve 32 and an automatic pressure regulating valve 33, to which the fire hose 20 is connected. 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 or closed, the fire hydrant valve 32 is remotely opened or closed by a known wire link mechanism. When the fire hydrant valve opening / closing lever 34 is opened or closed, a fire hydrant valve opening / closing detection switch provided on the lever operation box is turned on or off. In addition, a pump start switch 42 for use by the fire brigade is provided to the upper right of the 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 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 is held detachably 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 from the nozzle 38 is a non-elastic hose, for example a shape-retaining hose, with the two hoses connected together. In this embodiment, the hose length in a non-water-passing state of the fire hose 20 in which a non-elastic hose and an elastic hose are connected is a first set length L1 = 15 m, which is half the hose length of a conventional hose 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, thereby significantly reducing the thickness of the fire hydrant device 10. 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 description 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 length when water is not passing through it, and expands in the longitudinal direction when water is passing through it. The hose structure is arbitrary, but for example, it has a two-layer structure consisting of 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 impermeable to a specified elongation ratio K. The material that forms the watertight layer is synthetic rubber or a specified synthetic resin with a specified elongation ratio K that stretches at least 1.5 to 8 times when 1 MPa of fire water is allowed to pass through, 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 strong enough to withstand the water pressure caused by the passage of 1 MPa of fire water. Furthermore, since the cover layer rubs against the road surface when the fire hose 10 serving as a tunnel fire hydrant is pulled out, it is made of a material that has low friction and is abrasion-resistant enough to withstand the rubbing.

[0044] The material forming the cover layer is a predetermined fiber or a predetermined 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 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. Synthetic spider silk, for example, can be used as the fiber forming the knitted cover layer. One example of such synthetic spider silk is Spiber (registered trademark), manufactured by Spiber Inc.

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

[0046] Figure 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 Figure 5(B) shows the fire hose 20 in a water-passing state extended.

[0047] As shown in Figure 5(A), the fire hose 20 in a non-water-passing state is made up of a non-elastic hose 46 and an elastic hose 48 connected together. If the hose length of the fire hose 20 in a non-water-passing state is a first set length L1, and the hose length of the fire hose 20 in a water-passing state is a second set length L2 as shown in Figure 5(B), 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 together.

[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 can be calculated as follows: 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 a fire hose 1] Figure 6 shows a specific example of a fire hose 20 using an expandable hose 48 with an extension ratio K = 2.5, with Figure 6(A) showing the non-water-passing state and Figure 6(B) showing the water-passing state. Here, the first set length L1 of the fire hose 20 in the non-water-passing state is 15 m, the second set length L2 extended in the water-passing state is 30 m, 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 the non-water-passing state, the ratio of the hose lengths of the non-elastic hose 46 and 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 as 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 When the constant is set in advance, 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. Example of a fire hose 2] 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 the non-water-passing state and FIG. 7(B) shows the water-passing state.

[0056] Here, since the constants are 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) as follows: 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 lengths of the non-elastic hose 46 and 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 as 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 When the constant is set in advance, 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 elongation ratio K=3.0 is selected to manufacture the fire hose 20.

[0059] [g. Example of a 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 the non-water-passing state and FIG. 8(B) shows the water-passing state.

[0060] Here, since the constants are 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) as follows: 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 the non-water-passing state, the ratio of the hose lengths of the non-elastic hose 46 and 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 as 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 When the constant is set in advance, 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 elongation 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 needed, the hose lengths L1, L2 and the elongation ratio K can be set as arbitrary constants to determine the variable hose lengths L3, L4, or the hose lengths L1, L2, L3, L4 can be set as constants to determine the variable elongation ratio K.

[0064] [h. Dividing and connecting a non-stretchable hose and a stretchable hose] This section will explain in more detail a fire hose in which either a non-elastic hose or an elastic hose is split and connected to the other. This type of fire hose is a type of fire hose in which one part is elastic and the other part is non-elastic.

[0065] Figure 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. Figure 9(A) shows the non-water-passing state, and Figure 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, each 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, which has elastic hoses 48a, 48b connected to both sides of such a non-elastic hose 46, the elastic hoses 48a, 48b are each extended to 12.5 m corresponding to an extension ratio K = 2.5, as shown in Figure 9(B), 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, elastic hose 48a stretches while water is flowing, causing the base of the hose to be pressed firmly against the inside of hose storage section 16b, which could increase the pulling force at this point; however, elastic hose 48b stretches, pushing the nozzle 38 side out of hose storage section 16b, allowing at least non-elastic hose 46 to be pulled out smoothly.

[0069] Figure 10 shows another embodiment of a fire hydrant device that uses a fire hose in which a non-elastic hose is divided and connected to an elastic hose, and Figure 10(A) shows the non-water-passing state, and Figure 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 5-m divided non-elastic hoses 46a and 46b 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 in 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, which has 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 an 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 examples of fire hoses in which either a non-stretchable hose or a stretchable hose is divided and connected to the other, but are not limited to this and include fire hoses in which the ratio of the hose lengths of the two hoses and the extension ratio of the stretchable hose are arbitrarily determined as needed. Also, in addition to dividing either a non-stretchable hose or a stretchable hose, the examples include fire hoses in which both are divided and connected alternately.

[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 storing 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 thereof, and is not limited to the numerical values ​​shown in the above embodiments. [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 area 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 piping 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 stored in a housing so that it can be freely pulled out, The fire hydrant device is characterized in that a portion of the fire hose at the tip end is an elastic hose and the remaining portion is a non-elastic hose.

2. The fire hydrant device according to claim 1, The fire hydrant device is characterized in that the fire hose is formed by dividing the elastic hose and connecting it to the non-elastic hose.

3. 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 hydrant device 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 stored in a housing so that it can be freely pulled out, The fire hydrant device 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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