JPH0932976A - Feed water hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the occurrence of meandering phenomenon due to elongation of a hose made of cloth during the flow of water and to simultaneously achieve the increase in wear resistance and reduction of flow resistance. SOLUTION: A feed water hose is formed of a tubular fabric 5 wherein first and second warp trains A and B different in the repetition unit of a weave texture from each other are alternately juxtaposed. The repetition unit of the first warp train A weave texture is constituted in such a manner that a plurality of the weave textures wherein a warp 1a crosses the surface side of the warp 2 are continued and the number of the weave textures wherein the warp 1a crosses the back of the weft 2 is decreased to a value lower than the number of the weave texture where it crosses the surface of the weft. The repetition unit of the second warp train B is constituted in such a manner that a plurality of the weave textures wherein the warp 1b crosses the back of the weft 2 are continued and the number of the weave textures where it crosses the surface side of the weft is reduced to a value lower than the number of weave textures wherein it crosses the back side of the weft. The number of weave textures a plurality of which is continued is preferably 2 or 3.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a water supply hose in which a hose body such as a fire hose is made of cloth.

[0002]

2. Description of the Related Art As shown in FIG.
Connecting fittings 11 are attached to both ends of a cloth hose 10 having a length of m or 45 m, and the connecting fittings 11 can connect a plurality of fire hoses to each other.
The cloth hose 10 is formed of a tubular woven fabric, and the tubular woven fabric is formed as a plain weave structure in which warp yarns 15 and weft yarns 16 are alternately laid up and down as shown in FIG. There is.

When high-pressure water is passed through a fire hose having such a plain weave structure, the warp yarns that float up and down alternately with respect to the weft yarns and are bent in a zigzag shape are extended in the longitudinal direction by hydraulic pressure. Extend the full length. Therefore, in the fire hose connected in a long length, the middle portion is bent so as to meander to absorb the extension of the hose.
However, such a meandering phenomenon of the hose acts as a resistance when the fire hose is dragged around on the road, significantly hinders the fire extinguishing activity, and increases the flow resistance, thereby reducing the water discharge capacity.

Further, the cloth fire hose has a problem that its surface is worn by being dragged around the road surface, which affects the life of the hose. In particular, the force applied to the surface of the fire hose when passing water is about twice as much as the force applied to the warp, so that the greater the wear on the weft, the shorter the life of the hose.

[0005]

DISCLOSURE OF THE INVENTION An object of the present invention is to reduce the meandering phenomenon due to the elongation of a cloth hose at the time of passing water, and at the same time, to achieve an increase in wear resistance and a reduction in flow resistance. To provide a hose.

[0006]

The water supply hose of the present invention which achieves the above object is a tubular fabric formed by alternately arranging first warp rows and second warp rows having different repeating units of weave. In the repeating unit of the first warp row, the warp yarns have a plurality of continuous wefts intersecting on the front side of the weft, and the number of weaves intersecting on the back side of the weft is less than the number of weaves intersecting on the front side. In the repeating unit of the second warp row, a plurality of weaves in which the warp intersects on the back side of the weft are continuous, and the number of weaves intersecting on the front side of the weft is greater than the number of weaves intersecting on the back side. It is characterized by being configured to reduce the number. In addition,
In the present invention, the “repeating unit” refers to the smallest unit among the repeating units of the textures that form the warp row.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION The water supply hose of the present invention is preferably used as a fire hose, but is also applicable as a water supply hose for irrigation, civil engineering work and the like. The basic structure when used as a fire hose is the same as the conventional structure shown in FIG.
It is configured by attaching connecting fittings 11 to both ends of 0.

As shown in FIG. 2, a cloth hose 10 of a fire hose is composed of a tubular fabric 5 and a resin layer 3 lined on the inner surface thereof. The tubular fabric 5 is made of warp yarns 1a, 1
It is woven in a tubular shape from b and weft 2. The warp yarns 1a and 1b are woven for the hose in such a high density that the weft yarn 2 is barely visible. Warp 1a,
For the 1b and the weft 2, both synthetic fibers and natural fibers can be used. These fibers may be filament yarn obtained by twisting long fibers, or spun yarn obtained by twisting short fibers.

The tubular fabric 5 used in the water supply hose of the present invention has a woven structure as shown in the organization chart of FIG. In this organization chart, the white squares indicate the texture in which the warp intersects the back side (sink side) of the weft, and the hatched squares (black squares) indicate that the warp is the front side of the weft (floating side).
Represents the texture that intersects. In the structure diagram of FIG. 1, the tubular woven fabric 5 is configured by alternately arranging first warp rows A and second warp rows B having different weave repeating units.

The first warp row A is constructed so that the warp yarn 1a has two continuous weaves intersecting with the front side of the weft yarn 2 and one weave intersecting with the back side of the weft yarn 2. There is. That is, it is composed of repeating units of front / back = 2/1. On the other hand, the second warp row B is
The warp 1b has two continuous weaves intersecting the back side of the weft 2 and one weave crossing the front side of the weft 2. That is, it is composed of repeating units of front / back = 1/2.

In the illustrated example, the number of continuous textures is two, but three continuous textures may be used. That is, the first warp row A is front / back = 3 /
1 repeating unit, and the second warp row B is front / back = 1 /
It may be a combination of 3 repeating units. Also,
As another modified mode, the first warp row A is front / back = 3/2.
And the second warp row B as front / back = 2/3
May be a combination of repeating units of
The warp row A of is set to the repeating unit of front / back = 2/1, and the second
The warp row B may be a repeating unit of front / back = 1/3, and the first warp row A may be front / back = 3 /.
1 repeating unit, and the second warp row B is front / back = 1 /
It may be a combination of two repeating units.

In any case, the repeating unit of the first warp row has a plurality of weaves in which the warp intersects on the front side of the weft, and the number of weaves intersecting on the back side of the weft is the number of weaves intersecting on the front side. The repeating unit of the second warp row has a plurality of weaves in which the warp intersects on the back side of the weft, and the number of weaves intersecting on the front side of the weft intersects on the back side. It is configured to be less than the number.

In the present invention, it is preferable that the number of textures to be continuous on either the front or back side is 2 or 3. If the number of continuous weaves is more than 3, the warp binding property is deteriorated, and thus the wear resistance of the hose may be deteriorated. Also,
It is desirable that the first warp thread A and the second warp thread B are alternately arranged one by one as in the illustrated example, but if necessary, they are alternately arranged every one to three. You may do it. Further, the third warp row may be interposed in the alternating arrangement of the first warp row A and the second warp row B.

The water supply hose of the present invention has the first structure as described above.
In the warp row A, the warp 1a has a plurality of continuous weaves intersecting the front side of the weft 2, and the second warp row B also has the warp 1a.
Since b has a plurality of continuous weaves intersecting on the back side of the weft yarn 2, the warp yarns 1a and 1b constitute a conventional hose having a plain weave structure in the number of bends per unit length of hose. It is less than the number of bends in the warp.

Therefore, comparing the return length of the hose of the present invention with the conventional plain weave design when the warp is unwound for the same hose length, the warp of the hose of the present invention is better than that of the conventional hose. Since the length of the hose is shortened, the elongation of the hose when subjected to water pressure can be reduced as compared with the conventional plain weave hose. Moreover, the meandering phenomenon of the water supply hose can be reduced by reducing the amount of extension.

Two types of warp yarns A, which are alternately arranged,
In the first warp row A of B, since the warp 1a has a plurality of continuous weaves intersecting on the front side of the weft 2, the cover ratio of the warp 1a to the weft 2 is larger than that of the plain weave design. Will increase. Therefore, in the hose of the present invention, the frequency with which the weft threads come into contact with the road surface is reduced as compared with the conventional hose having a plain weave design, and thus the wear resistance of the hose can be improved.

On the other hand, in the second warp row B, since the warp 1b continuously has a plurality of weaves intersecting with each other on the back side of the weft 2, the warp 1 protruding to the inner surface of the hose via the resin layer is formed.
The protrusion b is formed in a slender shape in the longitudinal direction of the hose (that is, the water flow direction). On the other hand, in the case of the plain weave design, the projections of the warp protruding on the inner surface of the hose are short in the water-passing direction, and turbulent flow tends to occur in the water-passing. On the other hand, in the case of the hose of the present invention in which the elongated protrusion is formed, it becomes difficult to cause turbulent flow with respect to water flow,
Flow resistance can be reduced.

[0018]

As described above, the water supply hose of the present invention can reduce the meandering phenomenon due to the expansion of the hose during water flow, and further increase the wear resistance and the flow resistance at the same time. be able to.

[Brief description of drawings]

FIG. 1 is a structure diagram showing an example of a weave structure of a tubular fabric constituting a water supply hose of the present invention.

FIG. 2 is a longitudinal sectional view of the water supply hose along the warp direction.

FIG. 3 is a side view showing an example of a fire hose with an end portion partially broken away.

FIG. 4 is a structure diagram showing a weave structure forming a tubular fabric of a conventional fire hose.

[Explanation of symbols]

 1a, 1b Warp 2 Weft 5 Tubular woven fabric 10 Cloth hose A First warp row B Second warp row

Claims (2)

[Claims] 1. A tubular woven fabric constituted by alternately arranging first warp rows and second warp rows having mutually different repeating units, wherein the repeating units of the first warp row are The weft yarn has a structure in which a plurality of weaves that intersect on the front side of the weft yarn are continuous, and the number of weaves that intersect on the back side of the weft yarn is smaller than the number of weaves that intersect on the front side of the weft yarn. A water supply hose having a structure in which a plurality of wefts which the warp intersects on the back side of the weft are continuous, and the number of weaves intersecting on the front side of the weft is smaller than the number of weaves intersecting on the back side. 2. The water supply hose according to claim 1, wherein the number of the continuous textures is 2 or 3.