JP2002340241A - Fire fighting hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire fighting hose hard to cause kink. SOLUTION: In this fire fighting hose, a jacket woven cylindrical by a warp and a weft is lined with a liner layer. In the fire fighting hose, a weaving texture is a twill weave structure in which N/1 outer twill and 1/N inner twill (wherein N=3 or 4) are alternately arranged, a weaving texture is a twill weave structure in which an outer twill and 1/3 inner twill are alternately arranged, and the count per width of 50 mm of a weft is set to 30 or more.

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, a fire hose is connected to a fire hydrant or a water discharge pump at one end, and is connected to the other end of the fire hose in sequence to a required number of fire hoses.
A nozzle is connected to the end of the last fire hose to discharge water.
In order to move the water discharge nozzle to various places according to the state of the fire, the fire hose also moves while being dragged over the ground or the like.

If the fire hose receives an extreme bending load for some reason during the fire extinguishing operation as described above, the fire hose 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 weave structure of the jacket has a twill structure in which N / 1 outer twill and 1 / N inner twill (where N = 3 or 4) are alternately arranged.

[0006] Since the kink is a phenomenon in which the middle portion is bent in a V-shape when the fire hose is bent to a small radius of curvature, the curvature radius immediately before the kink is generated when the fire hose is bent ( The smaller the minimum bending radius is, the less likely the kink is to be generated. The fire hose of the present invention has a jacket having a twill structure in which the N / 1 outer twill and the 1 / N inner twill (where N = 3 or 4) are alternately arranged. Can be a hose. Therefore, the minimum bending radius when the fire hose is bent becomes as small as possible, and kink hardly occurs.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a jacket constituting a skeleton of a fire hose is woven so that a weft is spirally woven in a circumferential direction around a warp arranged in a cylindrical shape in a longitudinal direction. Further, the weave structure has a twill structure in which N / 1 outer twill and 1 / N inner twill (where N = 3 or 4) are alternately arranged. In particular, N = 3, 3/1 outer layer and 1/3
It is preferable that the inner twill and the twill are alternately arranged.

FIGS. 1 (A) to 1 (C) illustrate the case of N = 3 for the woven structure of the jacket constituting the fire hose of the present invention. In this organizational diagram, the vertical direction is the warp and the horizontal direction is the weft, and among the intersections where the warp and the weft intersect, the intersection where the warp is outside is indicated by a white square, and the intersection where the warp is inside is black. This is indicated by solid squares.

Each of the woven tissues shown in FIGS.
It has a configuration in which 1 outer layer and 1/3 inner layer are alternately arranged. 1A, the relationship between the 3/1 outer yarn and the 1/3 inner yarn that are adjacent to each other is determined by the intersection of the center position of three consecutive warp outer intersections of the 3/1 outer yarn. And the next 1 /
The three inner crosses are arranged so as to be aligned with the outer intersections of the warps in the weft direction. In the organization chart of FIG. 1 (B), 3/1
The intersection of the lower end positions of the individual outer intersections of the warp and the outer intersection of the adjacent 1/3 inner twill are arranged in the weft direction. In addition, in the organization chart of FIG.
The intersection of the upper end positions of the individual outer intersections of the warp and the outer intersection of the adjacent 1/3 inner yarns are arranged in the weft direction.

Thus, the woven structure of the jacket is reduced to 3/1.
Twill weave with outer twill and 1/3 inner twill alternately arranged, or 4
By adopting a twill weave in which / 1 / outer twill and 1/4 inner twill are arranged alternately, plain weave and 2
As compared with the case of the / 1 twill weave jacket, the warp becomes easier to move and bends while generating a torsion when subjected to a bending load, whereby the bending rigidity of the hose can be made smaller and easier to bend. As a result, the minimum bending radius when bending the fire hose is reduced, and kink can be less likely to occur.

In the above-mentioned twill weave design, the number of wefts per 50 mm width is preferably 30 or more, more preferably 35 or more. In a jacket used for a conventional fire hose, the number of wefts per 50 mm width is about 25, so that the density is higher 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-mentioned twill weave structure, kink is more unlikely to be generated in the fire hose of the present invention.

According to the nominal diameter of the hose, the number of wefts to be driven is desirably increased 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 above-mentioned jacket structure. 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 the 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 bent between the two plates 20 and 20 as shown in FIG. 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 an inner surface of a tubular jacket 2 and a water repellent 4 is coated on an 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. The driving method of the weft yarn 2b is alternately different for each adjacent warp yarn, and is N / 1 weave and 1 weft.
/ N weave (however, N = 3 or 4) has a twill structure that is alternately arranged.

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 used for the fire hose 1 as described above.
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.

[0023]

As described above, according to the fire hose of the present invention, the woven structure of the jacket has a twill structure in which N / 1 outer twill and 1 / N inner twill (where N = 3 or 4) are alternately arranged. As a result, the warp can be greatly moved and the bending rigidity can be reduced. Therefore, the minimum bending radius when bending the fire hose is reduced, and kink can be prevented from easily occurring.

[Brief description of the drawings]

FIGS. 1A, 1B, and 1C are organization diagrams each showing a woven structure of a jacket constituting a fire hose of the present invention.

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 diagram of a method for measuring a kink preventing effect of a fire hose.

FIG. 4 is an explanatory diagram of a kink generated in a fire hose.

[Explanation of symbols]

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

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) D03D 23/00 D03D 23/00 F16L 11/08 F16L 11/08 AB B 11/12 11/12 Z F term (Reference) 2E189 LA01 3H111 AA03 BA12 BA15 BA18 BA24 CA53 CB04 CB14 CB24 CB29 CC02 DA20 DB04 4L048 BA01 BB04 CA15 DA00 DA24 EB00

Claims (5)

[Claims] 1. A fire hose in which a liner layer is applied to a jacket woven from a warp and a weft in a tubular shape, wherein the woven structure of the jacket is N / 1 outer and 1 / N inner (where N = 3 or 4) A fire hose having a twill structure in which are alternately arranged. 2. The fire hose according to claim 1, wherein the weave structure has a twill structure in which 3/1 outer twill and 1/3 inner twill are alternately arranged. 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.