JP2513156Y2 - Shape Hoses - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shape retaining hose suitable as a fire hose.

[0002]

2. Description of the Related Art A conventional fire-fighting hose has a lining rubber layer lined on a cylindrical jacket woven with spun yarn, for example.

However, when such a fire hose is stored in a fire hydrant box or the like, the cylindrical shape of the hose is not retained, and water cannot be discharged unless all the hoses are extended.

Therefore, a shape-retaining hose has been developed which uses monofilament yarn as the weft yarn constituting the jacket.

According to this shape-retaining hose, since it can retain its cylindrical shape when it is stored in a fire hydrant box or the like, it is possible to discharge water without extending it all.

[0006]

However, the monofilament weft used for the shape-retaining hose has a circular cross section, a relatively large diameter, and rigidity. Therefore, on the inner and outer surfaces of the jacket, a bellows shape is generated in the length direction of the jacket along the row of the driven monofilament wefts.

Therefore, even if the lining layer is lined on the inner surface of the jacket, the bellows shape remains on the inner surface of the hose, resulting in a large loss of water pressure during water discharge.

In order to eliminate the bellows shape on the inner surface of the shape-retaining hose, there is a method in which the lining layer is thickened or the lining layer has a multilayer structure. However, such a method causes a problem that the weight of the hose is increased, the flexibility is lost, and the manufacturing cost is increased.

In view of the above, the present invention prevents the pressure loss at the time of water discharge by suppressing the generation of the bellows shape on the inner surface of the shape-retaining hose without thickening the lining layer or making it into a multi-layer structure, thereby preventing fire. It is intended to improve the fire-extinguishing ability of the hoses.

[0010]

The present invention relates to a shape-retaining hose constructed by lining a lining layer on the inner surface of a jacket woven using a monofilament weft having rigidity, and a twill fabric as the jacket. The shape-retaining hose is characterized in that the twill line of the twill fabric is formed on the inner surface of the jacket.

In the shape-retaining hose of the present invention, the warp and weft yarns are replaced by the plain weave fabric in which the warp yarn and the weft yarn are alternately crossed one by one, which is widely used in the past. The twill weave structure is composed of three or more yarns, in which the warp floats are obliquely displaced by one or a plurality of yarns, and diagonal undulating lines (twill lines) are formed on the surface of the woven fabric.

Some conventional fire hoses use twill fabric as a jacket. However, this is used only to express the flexibility of the hose, and the twill of the twill fabric is the outer surface of the hose.

On the other hand, the shape-retaining hose of the present invention is constructed such that the twill of the twill fabric is on the inner surface of the jacket, and the inner layer of the jacket is lined with the lining layer.

With this structure, a plurality of monofilament wefts having a circular cross section, a relatively large diameter, and rigidity are bridged by warps, and a lining layer is formed on the warp. By lining the hose, a bellows shape is prevented from being generated on the inner surface of the hose.

[0015]

The present invention will now be described in more detail by way of examples with reference to the drawings.

As shown in FIG. 1, the warp has a diameter of about 0.
Using a spun yarn 1 of 8 mm and a nylon monofilament 2 having a diameter of 1.0 mm as a weft yarn, a jacket 3 of a 1/2 twill weave structure (1, 2 twill weave) is arranged so that the twill line is inside the jacket. It was made.

As shown in FIG. 2, a rubber layer 4 having a thickness of 0.4 mm is lined on the surface 3a of the jacket 3 which is a twill fabric, to fabricate a shape retaining hose for fire fighting having an inner diameter of about 25 mm.

Comparative Example In order to evaluate the performance of the shape-retaining hose of the above-mentioned example, the following shape-retaining hose was produced.

Comparative Example 1: As shown in FIG. 3, a plain weave design jacket 5 was produced using the same warp and weft as in the example. A rubber layer having a thickness of 0.4 mm was lined on this jacket 5 in the same manner as in the example, to fabricate a shape retaining hose for fire fighting having an inner diameter of about 25 mm.

Comparative Example 2 A shape retaining hose for fire fighting similar to that of the example was produced except that the rubber layer 4 was lined on the back surface 3b of the jacket 3.

The shape-retaining hoses for fire fighting of the above-mentioned Examples and Comparative Examples 1 and 2 were each used for 20 m, and the water pressure loss for obtaining a nozzle pressure of 2.5 kg / cm ² (flow rate of 60 liters / minute) was determined during extension. It was The results are shown in Table 1.

[0022]

[Table 1]

As is clear from the results shown in Table 1, the fire-blocking hose of the example has a water pressure higher than that of the fire-blocking hose of Comparative Examples 1 and ² for obtaining a nozzle pressure of 2.5 kg / cm ^2. There is little loss. Therefore, when used for fire extinguishing activities, the load of, for example, the pressurized water supply device is small.

The reason why the loss of water pressure in the fire-preserving shape retaining hose of the above embodiment is small can be explained as follows. That is, in the shape-retaining hose for fire fighting of the above-mentioned embodiment, since the side of the twill weave is the inner surface of the hose, the inner surface of the hose spans a plurality of monofilament wefts (monofilaments 2) with warp bridges. It becomes like a state. For this reason,
The bellows shape on the inner surface of the hose is largely eliminated.

On the other hand, in the shape-retaining hose for fire fighting of Comparative Example 1, since the jacket is made of a plain weave, the bellows due to the monofilament wefts are generated both inside and outside the jacket. .

Further, in the shape retaining hose for fire fighting of Comparative Example 2,
Although the jacket is made of a twill fabric, since the twill is used as the outer surface of the hose, bridging of the monofilament weft with the warp appears on the outer surface of the hose. Therefore, the inner surface of the hose has a structure similar to that of the plain weave, and the bellows shape cannot be eliminated.

Although one embodiment of the present invention has been described above, the present invention is not limited to this, and various changes and modifications can be made within the scope of the technical idea of the present invention.

For example, the weave design of the jacket of the shape-retaining hose of the present invention is not particularly limited as long as it is a twill weave, but considering the wear resistance of the outer surface of the hose, etc.
Two-twill and one-third twill weaves are preferable, and in both cases, the side where the twill line is formed may be used as the inner surface of the hose.

The material of the weft yarn made of monofilament is not limited, and synthetic fiber such as polyester monofilament or steel wire may be used.

The diameter of the monofilament weft is not limited, but is 0.5 to 0.5 depending on various diameters of the shape-retaining hose.
2.5 mm is preferred.

The lining layer need not be a rubber layer,
It may be made of a synthetic resin such as a thermoplastic elastomer.

The shape-retaining hose for fire fighting according to the above-mentioned embodiment can be made resistant to pulling out and improved in abrasion resistance by subjecting its outer surface to synthetic resin processing.

In the above embodiment, the case where the shape-retaining hose of the present invention is used as a fire hose has been described, but the shape-retaining hose of the present invention is not limited to the fire-fighting hose and may be used as an industrial hose. You can also

[0034]

EFFECTS OF THE INVENTION Since the shape-maintaining hose of the present invention does not show a bellows shape on the inner surface of the hose, the loss of water pressure at the time of discharging water is small, and, for example, the load of a pressurized water supply device for extinguishing a fire is small.

[Brief description of drawings]

FIG. 1 is a conceptual diagram of a jacket used for a fire-maintenance hose of an example.

FIG. 2 is a vertical cross-sectional view of a fire-preserving shape-retaining hose of the example.

FIG. 3 is a conceptual diagram of a jacket used for a fire hose of Comparative Example 1.

[Explanation of symbols]

 1 spun yarn 2 monofilament 3 jacket 3a jacket front surface 3b jacket back surface 4 rubber layer 5 plain weave jacket

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Tohei Kanda, 197, Teikokuhonmachi, Kanuma City, Tochigi Prefecture Within Teikoku Fibers Co., Ltd. (72) Yoshio Ohno 2-5-13 Nihonbashi, Chuo-ku, Tokyo Teikoku Fiber Co., Ltd. (56) Bibliography Showa Sho 62-55785 (JP, U)

Claims (1)

(57) [Scope of utility model registration request] 1. A shape-retaining hose constructed by lining a lining layer on the inner surface of a jacket woven using a monofilament weft having rigidity, wherein a twill fabric is used as the jacket, and the twill of the twill fabric is used. A shape-retaining hose whose eyes are arranged on the inner surface of the jacket.