JP6858445B2 - Fire hose - Google Patents

Description

The present invention relates to a fire hose, and relates to a type of fire hose in which the inner surface of a flexible and flatly foldable jacket is lined with rubber or synthetic resin.

As shown in Japanese Patent Publication No. 58-24708, a conventional fire hose is a jacket in which warp threads and weft threads are woven with a plain weave structure, and the weft threads are exposed to the outside due to ultraviolet rays or trauma. An extremely mixed warp thread was used so that it would not be damaged.

However, in such a hose, since the warp threads float and sink for each weft thread, unevenness due to the weft thread occurs on the back surface of the jacket, and the unevenness is transferred to the inner surface of the lining, as shown in the drawings of the above-mentioned publication. In addition, uneven stripes extending in the circumferential direction of the hose are formed on the inner surface of the hose.

Therefore, the water passing through the hose flows across the uneven streaks, the water flow resistance of the hose becomes large, and the amount of water discharged is significantly reduced after flowing a long distance.

Further, as shown in Japanese Patent Application Laid-Open No. 2003-74756, the inner and outer surfaces of the twill weave structure in which a large amount of warp threads are exposed on the surface of the jacket are inverted, and the jacket is provided with a twill weave structure in which a large amount of warp threads are exposed on the inner surface of the jacket. It is conceivable to eliminate the uneven streaks on the inner surface by weaving, but in such a structure, many weft threads are exposed on the outer surface of the jacket, and the weft threads that bear the pressure resistance of the hose deteriorate due to ultraviolet rays and sunlight. Or it may be damaged by wear or trauma.

Jikken Sho 58-24708 Gazette Japanese Unexamined Patent Publication No. 2003-74756

The present invention has been made in view of such circumstances, and an object of the present invention is to protect the weft by warp threads on the surface of the jacket, prevent uneven stripes from being formed on the inner surface of the jacket, and reduce the water flow resistance of the hose. Is what you do.

Thus, in the present invention, the front warp threads that are long exposed on the surface of the jacket and the back warp threads that are long exposed on the inner surface of the jacket are alternately arranged, and the warp threads and the weft threads are woven by a warp double weave structure. In a hose having a rubber or synthetic resin lining on the inner surface of the jacket, the front and back warp yarns are made of synthetic spun yarns or bulky long fiber yarns, and the backing yarns are thinner than the front warp yarns. Is what you do.

In the present invention, the thickness of the back warp yarn is preferably 50 to 90% of the thickness of the front warp yarn.

According to the present invention, front warp threads that are long exposed on the surface of the jacket and back warp threads that are long exposed on the inner surface of the jacket are alternately arranged, and the warp threads and the weft threads are woven by a warp double weave structure. Therefore, the warp threads are covered on both the front and back sides of the jacket, and the weft threads are sandwiched between the front and back warp threads, so that the weft threads are protected from trauma such as sunlight and wear and are damaged. There is no.

The inner surface of the jacket has a long exposed backing yarn, and the backing yarn is made of a synthetic fiber spun yarn or a bulky long fiber yarn having excellent adhesion to the lining, so that the weft yarn does not come into contact with the lining. The backing yarn, which is made of spun yarn or bulky fiber yarn, has excellent adhesiveness to the lining.

Further, by using a synthetic fiber spun yarn or a bulky long fiber yarn as the warp yarn, these yarns are bulky and can effectively cover and protect the weft yarn, and the wear resistance of the hose can be ensured.

Further, according to the present invention, since the back warp threads are woven by a twill weave structure in which the back warp threads are exposed to the inner surface of the jacket for a long time with respect to the weft threads, the back weft threads conceal the unevenness of the jacket due to the weft threads, and the inner surface of the jacket is uneven due to the weft threads. It becomes smooth without any water flow, and the water flow resistance of the hose can be significantly reduced.

Further, according to the present invention, the back warp yarn is thinner than the front warp yarn and is woven at the same density as the front warp yarn. Therefore, the back warp yarn is flatly crushed by the tension in the circumferential direction on the back surface of the jacket. The inner surface of the hose is smoothed not only in the length direction but also in the circumferential direction by the flat warp yarn, which makes it possible to further reduce the water flow resistance.

It is a design drawing on the surface of the jacket of this invention. The structure of the jacket of the present invention is shown, where (a) is a plan view and (b) is a bb cross-sectional view.

Hereinafter, the present invention will be described with reference to the drawings. In the drawing, the jacket 1 is made by weaving warp threads 2 and weft threads 3, and as warp threads 2, front warp threads 2a and back warp threads 2b are alternately arranged.

The front warp thread 2a is woven by a 3/1 twill weave that is exposed to the surface of the jacket 1 for a long time with respect to the weft thread 3, and the back thread 2b is woven by a 1/3 that is exposed to the inner surface of the jacket 1 for a long time with respect to the weft thread 3. It is woven by twill weave.

Therefore, the front warp thread 2a floats mainly on the surface of the jacket 1 for a long time and floats only on the inner surface for a short time. Therefore, the tension is loosened on the surface of the jacket 1, and the tension of the back thread 2b is loosened on the inner surface of the jacket 1. The front warp yarn 2a is biased to the surface of the jacket 1, and the back warp yarn 2b is biased to the inner surface of the jacket 1.

Therefore, on the surface of the jacket 1, the floating portion of the warp yarn 2b is also wrapped in the warp yarn 2a and hardly appears on the surface, and conversely, on the inner surface of the jacket 1, the sunken portion of the warp yarn 2a is also wrapped in the back yarn 2b. Is done. Therefore, only the front thread 2a appears on the surface of the jacket 1, and only the back thread 2b appears on the inner surface.

Therefore, according to the present invention, only the backing yarn 2b made of synthetic fiber spun yarn or bulky long fiber yarn is present on the inner surface of the jacket 1, and neither the front yarn 2a nor the weft yarn 3 is exposed on the inner surface. , Jacket 1 has very good adhesion to the lining.

Since the weft thread 3 is not exposed on the inner surface of the jacket 1, a filament thread having high strength can be used, and even so, the adhesiveness between the jacket 1 and the lining is not hindered.

Further, by using a synthetic fiber spun yarn or a bulky long fiber yarn for the warp yarn 2a, the spun yarn or the bulky long fiber yarn has excellent wear resistance and is bulkier than the filament yarn. The weft thread 3 is effectively concealed from sunlight and wind and rain, and the jacket 1 has excellent wear resistance.

Further, since the back warp thread 2b is thinner than the front warp thread 2a and is woven at the same density as the front warp thread 2a, the back warp thread 2b is in a state of being crushed flatter than the front warp thread 2a, and the inner surface of the jacket 1 is flattened. It will be covered with the backing thread 2b in the state, and will be in a smooth state without unevenness.

Therefore, since the inner surface of the jacket 1 becomes smooth, unevenness is not formed on the inner surface of the lining 4, the inner surface of the hose becomes extremely smooth, and the water flow resistance is significantly reduced.

1 Jacket 2a Front warp 2b Back warp 3 Weft 4 Lining

Claims (2)

The front warp threads that are exposed for a long time on the surface of the jacket and the back warp threads that are exposed for a long time on the inner surface of the jacket are alternately arranged, and the warp threads and the weft threads are woven by a warp double weave structure. A hose with a synthetic resin lining, wherein the front and back warp yarns are made of spun synthetic fibers or bulky long fiber yarns, and the backing yarns are thinner than the front warp yarns. The fire hose according to claim 1, wherein the thickness of the back warp thread is 50 to 90% of the thickness of the front warp thread.

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