JP3834346B2 - Water hose - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water supply hose in which a hose body such as a fire hose is made of cloth.
[0002]
[Prior art]
As shown in FIG. 3, the fire hose is configured such that a connecting metal fitting 11 is attached to both ends of a fabric hose 10 having a length of 20 m or 45 m, and a plurality of fire hoses can be connected to each other by the connecting metal fitting 11. Yes. The fabric hose 10 is composed of a tubular woven fabric, and the tubular woven fabric is configured as a plain weave structure in which warps 15 and wefts 16 are alternately woven and floated one by one as shown in FIG. Yes.
[0003]
When high-pressure water is passed through a fire hose with such a plain weave structure, warp yarns are alternately floated and zigzag bent one by one with respect to the weft, and are stretched in the longitudinal direction by the water pressure. To do. Therefore, the fire hose connected to the long length is bent so as to meander the middle portion to absorb the extension of the hose. However, such a meandering phenomenon of the hose becomes a resistance when the fire hose is dragged on the road, significantly hinders the fire-extinguishing activity, and decreases the water discharge capacity because the flow resistance is increased.
[0004]
In addition, the fire hose made of cloth has a problem that the surface is worn by dragging 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 that of the warp on the warp. Therefore, the greater the wear on the weft, the faster the hose life is.
[0005]
[Problems to be solved by the invention]
An object of the present invention is to provide a water supply hose that can reduce the meandering phenomenon based on the elongation of the fabric hose during water flow and can simultaneously achieve an increase in wear resistance and a reduction in flow resistance.
[0006]
[Means for Solving the Problems]
The water supply hose of the present invention that achieves the above object comprises a tubular woven fabric having a single woven structure in which first warp rows and second warp rows having different weave repeating units are alternately arranged in parallel. The repeating unit of one warp row consists of a configuration in which two or three weaves where the warp intersects on the front side of the weft are continuous, 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 addition, the repeating unit of the second warp row has two or three consecutive weaves where the warp intersects on the back side of the weft, and the number of weaves intersecting on the front side of the weft is less than the number of weaves intersecting on the back side. It is characterized by comprising the following structure.
In the present invention, the “repeating unit” means the smallest unit among the repeating units of the weave constituting the warp row.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
The water supply hose of the present invention is preferably used as a fire hose, but is also applied as a water supply hose for irrigation, civil engineering work, and the like.
The basic configuration when used as a fire hose is the same as that of the conventional structure shown in FIG. 3, for example, and is configured by attaching the coupling metal 11 to both ends of the cloth hose 10.
[0008]
As shown in FIG. 2, the fire hose cloth hose 10 is composed of a tubular woven fabric 5 having a single woven structure and a resin layer 3 lined on the inner surface thereof. The tubular fabric 5 is woven from a warp 1a, 1b and a weft 2 into a tubular shape. The warps 1a and 1b are woven at a high density so that the weft 2 can hardly be seen from the appearance for a hose.
For the warps 1a, 1b and the weft 2, any of synthetic fibers and natural fibers can be used. These fibers may be filament yarns obtained by twisting long fibers or spun yarns obtained by twisting short fibers.
[0009]
The tubular woven 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 wrinkles indicate the weaves where the warp crosses the back side (sink side) of the weft, and the hatched wrinkles (black reeds) cross the warp front side (the floating side). Represents a texture.
In the organization chart 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.
[0010]
The first warp row A is configured so that the warp 1 a has two continuous weaves intersecting the front side of the weft 2 and has one weave intersecting the back side of the weft 2. That is, it is composed of repeating units of front / back = 2/1. On the other hand, the second warp row B is configured so that the warp 1b has two continuous weaves intersecting the back side of the weft 2 and one weave intersecting the front side of the weft 2. ing. That is, it is composed of repeating units of front / back = 1/2.
[0011]
In the example shown in the figure, the number of continuous weaves is two, but three may be used. That is, a combination in which the first warp row A is a repeating unit of front / back = 3/1 and the second warp row B is a repeating unit of front / back = 1/3 may be used. As another modification, the first warp row A is a front / back = 3/2 repeating unit, and the second warp row B is a front / back = 2/3 repeating unit. The first warp row A may be a repeating unit of front / back = 2/1 and the second warp row B may be a repeating unit of front / back = 1/3, The first warp row A may be a front / back = 3/1 repeating unit, and the second warp row B may be a front / back = 1/2 repeating unit.
[0012]
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 less than the number of weaves intersecting on the front side. The repeating unit of the second warp row is composed of 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 is greater than the number of weaves intersecting on the back side. It is composed of fewer.
[0013]
In the present invention, the number of texture to be continuous to one sides or you to 2 or 3. When texture number successive becomes larger than 3, since the focusing of the warp will be lowered, that may arise from the possibility of lowering the wear resistance of the hose.
Further, it is desirable that the first warp row A and the second warp row B are alternately arranged one by one as in the example shown in the drawing, but if necessary, alternately for every 1 to 3 yarns. It may be arranged. Further, a third warp row may be interposed in an alternating arrangement of the first warp row A and the second warp row B.
[0014]
The water supply hose of the present invention has a plurality of continuous weaves in which the warp 1a intersects the front side of the weft 2 in the first warp row A as described above, and the warp 1b of the second warp row B also has the weft 1b. Since the warp crossing the back side of 2 has a plurality of continuous weaves, the number of bends per hose unit length of the warp yarns 1a and 1b is that of the warp yarn constituting the conventional plain weave hose. Less than the number of bends.
[0015]
Therefore, in the hose of the present invention and the conventional plain weave hose, the warp of the hose of the present invention is shorter than that of the conventional hose when comparing the return length when the warp is unwound for the same hose length. The elongation that elongates when subjected to water pressure can be reduced as compared with a hose having a conventional plain weave structure. Further, the meandering phenomenon of the water supply hose can be reduced by reducing the amount of extension.
[0016]
Of the two types of warp rows A and B that are alternately arranged, the first warp row A has a plurality of continuous weaves in which the warp 1a intersects on the front side of the weft 2, so that the warp 1a The coverage with respect to the weft 2 is increased as compared with the plain weave structure. Therefore, in the hose of the present invention, since the frequency with which the weft contacts the road surface is reduced as compared with the conventional plain weave hose, the wear resistance of the hose can be improved.
[0017]
On the other hand, the second warp row B has a plurality of continuous weaves in which the warp 1b intersects on the back side of the weft 2, so that the projection of the warp 1b protruding through the resin layer on the inner surface of the hose is provided. , It is formed to be elongated with respect to the longitudinal direction of the hose (that is, the water flow direction). On the other hand, in the case of a plain weave structure, the warp protrusions protruding from the inner surface of the hose are shorter in the direction of water flow, and are likely to cause turbulent flow. On the other hand, in the case of the hose of the present invention in which elongated protrusions are formed, it becomes difficult to cause turbulent flow with respect to water flow, and flow resistance can be reduced.
[0018]
【The invention's effect】
As described above, the water supply hose of the present invention can reduce the meandering phenomenon based on the elongation of the hose during water flow, and can simultaneously increase the wear resistance and reduce the flow resistance.
[Brief description of the drawings]
FIG. 1 is a structural diagram showing an embodiment of a woven 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 a partially broken end portion thereof.
FIG. 4 is a structural diagram showing a woven structure constituting a tubular fabric of a conventional fire hose.
[Explanation of symbols]
1a, 1b Warp 2 Weft 5 Tubular fabric 10 Fabric hose A First warp row B Second warp row

Claims (1)

It consists of a single woven tubular fabric composed of alternately arranged first and second warp rows having different weave repeat units, and the repeat unit of the first warp row is a weft yarn 2 or 3 continuous weaves intersecting on the front side of the weft, the number of weaves intersecting on the back side of the weft is less than the number of weaves intersecting on the front side, and the repeating unit of the second warp row is A water supply hose comprising a structure in which two or three weaves intersecting on the back side of the weft yarn are continuous, and the number of weaves intersecting on the front side of the weft yarn is less than the number of weaves intersecting on the back side.

Images