JP2002267053A - Fire-fighting hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fire-fighting hose capable of improving wear resistance of a folding part of a hose body. SOLUTION: In the fire-fighting hose in which the hose body comprising a jacket 2 formed in a cylindrical shape by weaving warps 5 and wefts 6 and a lining layer 3 lined on an inner circumferential surface of the jacket 2 is folded flat when not in use, high-strength fibers are used for warps 7 forming the folding part 4 when the hose body 1 is folded flat.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a fire hose excellent in wear resistance.

[0002]

2. Description of the Related Art A fire hose comprises a tubular body formed by weaving warp yarns and weft yarns and a lining layer lined on the inner peripheral surface of the jacket. Normally, a female connection fitting is attached to one end of the hose body, and a male connection fitting is attached to the other end, and a plurality of firefighting units are connected by connecting the female and male connection fittings. The hose can be extended. Also,
In the hose body having a water supply nozzle at one end, a female connection fitting is attached to the other end so that it can be connected to the tip of the extended fire hose.

A fire hose is folded flat when not in use, and is mounted on a fire engine in a meandering state or wound around a drum. Fire fighting activities are carried out by lowering the fire hose from the fire engine and extending it, or extending it out of the drum by connecting the connecting fittings to each other and then feeding water from the water pump to the fire hose.

[0004] By the way, firefighting hoses are carried to the destination during firefighting activities or firefighting drills.
The fire hose is long and has a large weight because connection fittings are attached to both ends of the hose body. Therefore, the fire hose is often carried while rubbing the ground.

[0005] In general, a jacket serving as an outer skin of a hose body is formed of, for example, polyester fiber or the like. FIG.
When the hose body a is folded into a V-shape and the ground b is rubbed, the fold part (ear part) c of the hose body a comes into contact with the ground b as shown in FIG. Fountain (water leakage) at the water supply pressure. Care should be taken in carrying around and avoiding V-shaped rubbing.However, the hose after water supply may have water remaining inside, and has a heavy mass, so avoid V-shaped rubbing. I can't.

[0006]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances.
An object of the present invention is to provide a fire hose that improves the abrasion resistance of a fold portion of a hose body without increasing the weight of a jacket and that is not easily damaged even if the ground is rubbed when the hose is carried.

[0007]

In order to achieve the above object, according to the present invention, there is provided a jacket formed by weaving a warp and a weft into a tubular shape, and a lining on an inner peripheral surface of the jacket. A high-strength fiber is used for a warp that is a fold portion when the hose body is folded flat when the hose body composed of the lining layer is folded flat when not in use. .

According to a second aspect of the present invention, the warp made of the high-strength fiber of the first aspect is formed of a plurality of warp yarns so that a wear-resistant region having a constant width is formed at a fold portion of the hose body. It is characterized by being provided in.

A third aspect of the present invention is characterized in that the warp made of the high-strength fiber according to the first aspect is twisted with another fiber.

In a fourth aspect, the warp yarn of the high-strength fiber of the first aspect is any one of a para-aramid fiber, a wholly aromatic PET fiber, a polyparaphenylene benzobisoxazole fiber, and a mixed twist yarn thereof. It is characterized by the following.

According to the above construction, since the fold portion of the hose body is formed of the high-strength fiber, even if the hose is rubbed against the ground while being carried, the damage of the jacket is prevented by the cut resistance of the high-strength fiber. Can be prevented and the life of the fire hose can be extended. Also, even if the warp yarn is severely damaged by severe local wear, the high tensile strength of the remaining high-strength fiber can sufficiently withstand the water discharge pressure.

[0012]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a perspective view of a fire hose, and FIG. 2 is a perspective view of the fire hose in a folded state. As shown in FIGS. 1 and 2, the hose body 1 of the fire hose comprises a jacket 2 and a lining layer 3 made of rubber or synthetic resin lined on the inner peripheral surface of the jacket 2. When the hose body 1 is not used, it is folded flat as shown in FIG. 2, and its fold portion 4 (ear) has a fold habit.

The jacket 2 is formed by weaving a warp yarn 5 and a weft yarn 6 into a tubular shape, and is woven by an annular loom or a bag loom. The warp yarns 5 and the weft yarns 6 are formed of, for example, polyester filament yarns. A warp yarn 7 made of a high-strength fiber is used for a certain width of the fold portion 4 of the hose body 1 and is woven with the weft yarns 6. I have.

The warp yarns 7 composed of high-strength fibers include, for example, para-aramid fibers (technola, Kepler, Twaron, trade names manufactured by Teijin Limited) and wholly aromatic PET fibers (trade names manufactured by Kuraray Co., Ltd.) Vectran) or polyparaphenylene benzobisoxazole (PBO) fiber (Zylon, a trade name of Toyobo Co., Ltd.), or a mixed twist thereof, and both have excellent cut resistance. , Has wear resistance.

The warp yarns 7 composed of high-strength fibers are composed of a plurality of yarns so that a wear-resistant region 8 is formed in the fold portion 4.
The hose body 1 is provided over the entire length in the longitudinal direction. In addition,
All the warp yarns 7 in the wear-resistant region 8 are preferably high-strength fibers, but may be, for example, mixed twist yarns with polyester short fiber yarns.

Here, a test example (V-shaped local wear test of fire hose) will be described as follows.

In the rotary wear tester used, as shown in FIG. 3, a rotary plate 13 rotated by a motor 12 is provided at the center of a disk-shaped wear surface 11 made of concrete. The rotating plate 13 protrudes radially, and the wear surface 11
There are provided a plurality of bars 14 which pivot on the upper part of the bar.
A sample (fire hose) 15 can be fixed to these bars 14. The specimen 15 cuts the fire hose into a predetermined length and folds it into two to form a V-shape.
The fold portion (ear portion) 16 is fixed to the bar 14 in a state of being in contact with the wear surface 11.

[Conditions] Tensile speed 4 km / hr (13 to 14 seconds / periphery) Wear part Ear part When testing with two or four ears, set them diagonally.

[Confirmation] The residual breaking pressure after turning 5 times (about 75 m) under the above conditions is measured.

Table 1 shows the results of a V-shaped local wear test of a fire hose using a rotary abrasion tester. High-strength fibers were used for warp yarns at folds (ears) of all hoses. The indicated value is the pressure at which the pressure test is performed and the hose breaks or reaches a pinhole (fountain).

[0022]

[Table 1]

According to the test results, the use of a high-strength fiber for the warp of the fold (ear) of the hose makes it possible to average twice as much as a hose having a jacket made of ordinary polyester fiber. It was confirmed that there was abrasion resistance.

In the above embodiment, a fire hose mounted on a fire engine has been described. However, the present invention can also be applied to a fire hydrant hose.

[0025]

As described above, according to the present invention, the hose body of a fire hose having a lining layer on the inner peripheral surface of a tubular jacket formed by weaving warp and weft is folded flat. The use of the high-strength fiber for the warp that becomes the fold portion when the hose is folded makes it possible to improve the wear resistance of the fold portion of the hose body without increasing the weight of the jacket. Therefore, even if the ground is rubbed when the hose is carried, it is not easily damaged, and the life of the fire hose can be extended.

[Brief description of the drawings]

FIG. 1 is a perspective view of a fire hose according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the fire hose in a folded state, showing the embodiment.

FIG. 3 is a view showing a use state of a rotary wear tester.

FIG. 4 is a side view showing a state in which the hose body is folded into a V shape and the ground is rubbed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Hose main body 2 ... Jacket 3 ... Lining layer 4 ... Folded part 5 ... Warp yarn 6 ... Weft yarn 7 ... High strength fiber

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[Procedure amendment]

[Submission date] May 17, 2001 (2001.5.1)
7)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0022

[Correction method] Change

[Correction contents]

[0022]

[Table 1]

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Masanori Sugiura 1-21-17 Sasazuka, Shibuya-ku, Tokyo Sakura Rubber Co., Ltd. F-term (reference) 3H111 AA02 BA18 CB08 DA10 DB04

Claims (4)

[Claims] Claims: 1. A fire-fighting hose in which a hose body comprising a tubular jacket formed by weaving a warp and a weft and a lining layer lined on the inner peripheral surface of the jacket is folded flat when not in use. A fire hose comprising a high-strength fiber used as a warp serving as a fold when the hose body is folded flat. 2. A warp comprising the high-strength fiber, comprising a plurality of warp yarns so that a wear-resistant region having a constant width is formed in a fold portion of the hose body, and provided over the entire length in the longitudinal direction of the hose body. The fire hose according to claim 1, wherein: 3. The fire hose according to claim 1, wherein the warp made of the high-strength fiber is twisted with another fiber. 4. The warp comprising the high-strength fiber is any one of a para-aramid fiber, a wholly aromatic PET fiber, a polyparaphenylene benzobisoxazole fiber, or a mixed twist yarn thereof. 1. The fire hose according to 1.