JP2002340239A - Fire hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire hose causing little kink. SOLUTION: This fire hose 1 sticks a liner layer 3 in a jacket 2 woven in a cylindrical shape from the warp 2a and the weft 2b, and is characterized by constituting the jacket 2 by spirally weaving the jacket 2 by arranging the weft 2b of three (A, B, and C) or more in parallel to the warp 2a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a fire hose,
More specifically, the present invention relates to a fire hose in which kink is hardly generated.

[0002]

2. Description of the Related Art During a fire extinguishing operation, one end of a fire hose is connected to a fire hydrant or a water discharge pump, and the other end is sequentially connected to a required number of fire hoses. A nozzle is connected to the end to discharge water. Since the water discharge nozzle is moved to various places according to the state of the fire, the fire hose is dragged over the ground or the like in accordance with the movement.

When the fire hose receives an extreme bending load for some reason during the fire extinguishing operation as described above, it is bent in a V-shape on the inner peripheral side of the curved portion of the fire hose 1 as shown in FIG. May cause kink K. When such a kink K occurs, the water flow area of the fire hose 1 becomes substantially zero or is reduced to a small degree, so that the water flow stops or the water flow rate becomes extremely small. Therefore, there are problems that the fire extinguishing operation can no longer be performed and fire extinguishing workers are exposed to danger.

[0004]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a fire hose which solves the above-mentioned conventional problems and hardly causes a kink.

[0005]

Means for Solving the Problems A fire hose according to the present invention, which achieves the above object, is a fire hose comprising a jacket woven from a warp and a weft in a tubular shape, and a liner layer internally attached to the jacket.
The jacket is characterized in that three or more wefts are spirally woven into a warp in a state of being arranged independently and parallel to each other.

As described above, the kink is a phenomenon in which the middle portion is bent into a V-shape when the fire hose is bent to a small radius of curvature. A smaller radius (minimum bending radius) results in a hose that is less prone to kink.
The fire hose of the present invention has a configuration in which three or more wefts are helically woven in a state of being arranged independently and parallel to each other, so that the helical angle of the weft with respect to the hose axis direction is one, as in the conventional hose. It can be smaller than when wefts or two wefts arranged in parallel are spirally woven. For this reason, the bending rigidity is reduced, the torsion of the hose at the time of bending is large, and the hose is easily bent, the minimum bending radius is reduced, and kink is less likely to occur.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a jacket constituting a skeleton of a fire hose is woven from a warp and a weft in a tubular shape. And when weaving this tubular jacket,
Three or more wefts are woven into the warp so that they are arranged independently and parallel to each other and continuously spirally wrap around. That is, when the state of the weft is shown in the figure, FIG.
(B).

FIGS. 1 (A) and 1 (B) are schematic views showing the tubular jacket with only the wefts without the warps.

Since the tubular jacket 2 is flexible, it has a circular cross section when water is passed, and can be folded into a flat cross section when water is not passed. The jacket 2 is in a state where at least three wefts 2b (A, B, C) are arranged in parallel independently of each other, and while maintaining the arrangement state,
A plurality of yarns are continuously helically wound and woven into warps arranged in a ring. On the other hand, in the conventional fire hose, as shown in FIG. 6 or FIG. 7, the jacket 2 has one weft 2b or two wefts 2b (A, B) parallel to each other spirally woven. Was configured as follows.

As shown in FIG. 1A, the fire hose jacket 2 of the present invention has three or more weft yarns 2b (A, B, C).
Are spirally woven in a state where they are arranged independently and parallel to each other, so that the spiral angle θn formed by these wefts 2b (A, B, C) with respect to the hose axis direction O is the conventional firefighting angle shown in FIG. A spiral angle θ ₁ formed by the weft 2b of the hose jacket 2 with respect to the hose axis direction O, and a spiral angle θ formed by the weft 2b (A, B) of the conventional fire hose jacket 2 of FIG. It is smaller than ₂ (θ
n <θ ₁ , θn <θ ₂ ).

Since the spiral angle θn of the weft yarn 2b (A, B, C) is small, as shown in FIG. 3, the fire hose 1 is moved from the straight state of FIG. )
When the fire hose 1 is bent as described above, the fire hose 1 bends along the spiral direction of the weft 2b while twisting as shown by the arrow, so that the bending rigidity is reduced and a smaller bending radius is formed without generating wrinkles or the like inside. Easier to do. As a result, the minimum bending radius when bending the fire hose is smaller than that of the conventional fire hose, and kink is less likely to occur.

In the present invention, the warp and the weft constituting the jacket may be synthetic fibers, natural fibers, filament yarns or spun yarns.

The woven structure of the jacket is not particularly limited, but is preferably a twill weave. Twill weaves have fewer texture points than plain weaves, so the bending stiffness when bending fire hoses is small, and the stress generated on the curved inner peripheral surface is dispersed in the longitudinal direction of the hose so that it does not concentrate at one place. . For this reason, kink can be hardly generated.

In the above-mentioned twill weave, the number of wefts per 50 mm width is preferably 30 or more, more preferably 35 or more. In a jacket used in a conventional fire hose, the number of wefts to be driven is about 25 per 50 mm width, so that the weft is made denser than this. In this way, the number of the wefts per 50 mm width is made denser to 30 or more, so that the deformation of the curved inner side surface when the fire hose is subjected to the bending action is not concentrated at one place, and a large number of each weft is formed. Can be dispersed and absorbed. Therefore, in combination with the above-described twill weave structure, kink can be further reduced in the fire hose of the present invention.

According to the nominal diameter of the hose, it is desirable that the number of wefts to be driven increases as the nominal diameter increases. That is, in particular, the number of wefts per 50 mm width in a hose having a nominal diameter of 50 mm or more is preferably 35 or more, and more preferably 38 or more. The upper limit of the number of wefts per 50 mm width is not particularly limited, but is preferably set to about 60.

The fineness of the weft is not particularly limited, but it is preferable to use a yarn of 1100 dtex or more.

In the present invention, it is more preferable to coat the outer surface of the jacket with a water repellent in addition to the jacket structure as described above. At a fire site, water often accumulates on the road surface and forms a water film.However, if the fire hose comes into contact with the water film and the jacket becomes wet, the frictional resistance when dragging the ground increases, resulting in a large A kink is likely to be generated by receiving a bending action due to frictional force. However, by coating the outer surface of the jacket with a water repellent as described above and keeping the jacket always in a dry state, it becomes difficult to receive the bending action due to the frictional force, thereby reducing the occurrence of kink. Can be.

As a water repellent used for coating, silicone is preferred. Silicone not only keeps the jacket dry, but also reduces the frictional resistance with the road surface, so that the bending action received by the frictional force with the road surface can be reduced. The type of silicone is not particularly limited, but a silicone rubber having a main chain of an organosiloxane bond _{ (SiR ₂ O) _n} is preferred.

The anti-kink effect of the fire hose can be easily confirmed by a measuring method as shown in FIG.

First, water is filled in the fire hose of interest,
When a pressure (water pressure) of 0.4 MPa is applied and the hose is sandwiched between two plates 20 and 20 as shown in FIG. 4 and the hose is bent while approaching each other, immediately before a kink occurs. Measure the minimum bending radius r (pressure 0.4
MPa corresponds to the water pressure at the nozzle outlet when water is discharged from the fire hose). The smaller the minimum bending radius r, the less likely it is for the kink to occur.

According to the fire hose of the present invention, the minimum bending radius r can be set to 25 cm or less, more preferably 20 cm or less.

FIG. 2 shows a main part of a fire hose according to an embodiment of the present invention.

As shown in FIG. 2, the fire hose 1 is configured such that a liner layer 3 is attached to the inner surface of a tubular jacket 2 and a water repellent 4 is coated on the outer surface. The tubular jacket 2 is formed by arranging a large number of warps 2a in a ring shape in the longitudinal direction of the hose, and wefts 2b are helically driven into these. In the method of driving the weft yarn 2b, the weft yarns 2b are arranged in parallel in units of at least three yarns, and are woven so as to spiral continuously in the circumferential direction. Twill weave is preferred as the texture.

The liner layer 3 attached to the inside of the jacket 2 is provided as a seal layer. The liner layer 3 is made of a soft resin such as polyvinyl chloride or polyethylene, natural rubber, or synthetic rubber.

The water repellent 4 is, as described above, a fire hose 1
Is provided so that the jacket 2 does not become wet by the water when it comes into contact with a water film on the ground. By keeping the jacket 2 always in a dry state, the fire hose 1 can maintain a high anti-kink effect.

[0026]

As described above, according to the fire hose of the present invention, three or more wefts are arranged in parallel and woven in a spiral shape. Can be made smaller than the one in which one or two wefts are arranged in a spiral shape, and the minimum bending radius when bending the hose is reduced, so that kink is less likely to occur.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an example of a jacket forming a fire hose of the present invention using only weft yarns, (A) is a front view,
(B) is a cross-sectional view.

FIG. 2 is a longitudinal sectional view showing a main part of an embodiment of the fire hose of the present invention.

FIG. 3 is an explanatory view of an operation when the fire hose of the present invention is bent, (A) is a front view showing a state before bending,
(B) is a front view when a bending load is applied.

FIG. 4 is an explanatory diagram of a method for measuring a kink preventing effect of a fire hose.

FIG. 5 is an explanatory diagram of a kink generated in a fire hose.

FIG. 6 is an explanatory diagram showing an example of a conventional fire hose jacket using only weft yarns.

FIG. 7 is an explanatory view showing another example of a conventional fire hose jacket using only weft yarns.

[Explanation of symbols]

 Reference Signs List 1 fire hose 2 jacket 2a warp 2b weft 3 liner layer 4 water repellent K kink

Claims (5)

[Claims] 1. A fire hose comprising a jacket woven from a warp and a weft in a tubular shape and having a liner layer applied thereto, and the jacket is spirally woven into the warp in a state in which three or more wefts are arranged independently and parallel to each other. Fire hose like that. 2. The fire hose according to claim 1, wherein the woven structure of the jacket is a twill weave. 3. The fire hose according to claim 1, wherein the number of hits per 50 mm width of the weft is 30 or more. 4. The fire hose according to claim 1, wherein the outer peripheral surface of the jacket is coated with a water repellent. 5. The water-repellent agent is silicone.
The fire hose described in.