JP2003207076A - Pressure resistant hose - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressure resistant hose which allows confirming from appearance that it is of pressure resisting type even if its outermost layer is not transparent, heightens the pressure resisting effect with reinforcing threads, and allowing easy and smooth operations to take out the hose and rewind on/from a hose reel. <P>SOLUTION: The pressure resistant hose is structured so that reinforcing threads are wound on the outermost layer of a hose wall in a laminate structure and put in the embedded condition, wherein ridges are formed at the surface of the outermost layer in a meshed pattern corresponding to the thread embedded condition. The outermost layer is made opaque by including a pigment, etc., in it for establishing a finer appearance of the hose. The reinforcing threads are thickened and twisting is strengthened for producing well such ridges and heightening the pressure resisting strength of the hose. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hose wall having a laminated structure in which a reinforcing thread is embedded in a wound shape, and some problems relating to the outermost layer are improved. Mainly related to pressure hoses for water supply.

[0002]

2. Description of the Related Art FIGS. 3 and 4 show an example of the structure of a conventional water pressure hose as a partially broken perspective view and a partially longitudinal sectional view. This pressure-resistant hose B made of synthetic resin has a laminated structure of four layers, and the first layer 21 is arranged in order from the innermost layer side.
Is a clean white layer, the second layer 22 is a black layer to prevent the generation of algae, the third layer 23 is a thread winding layer for winding the reinforcing thread 20, and the outermost fourth layer. 24 is the reinforcing yarn 20
Is embedded as a transparent layer. Since the third layer 23 can be seen through the transparent fourth layer, it is colored to improve the appearance of the pressure-resistant hose B.

[0003]

The conventional pressure-resistant hose B having the above structure has some problems to be improved as listed below. (B) Since the outermost layer is transparent so that it can be confirmed at a glance that it is a pressure-resistant hose, the reinforcing thread can be seen through and there is a problem in the appearance as a product. (B) The twist of the reinforcing yarn 20 is weakened or thinned so that the portion in which the reinforcing yarn 20 is embedded does not protrude to the outside of the hose and impairs the appearance. (C) As a result, the cross section of the reinforcing yarn 20 was flattened, and the pressure resistance of the hose could not be increased. (D) A hose with a smooth surface has a tendency to stick to each other, depending on the material of the hose, so it was difficult to smoothly wind and unwind the hose reel.

Therefore, it is possible to confirm at a glance that the object of the present invention is a pressure-resistant hose without making the outermost layer transparent.
Another object of the present invention is to provide a pressure resistant hose having features such that the pressure resistance effect of the reinforcing yarn can be further enhanced, and that the winding / rewinding operation on the hose reel can be easily performed smoothly.

[0005]

The pressure-resistant hose according to the present invention for achieving the above-mentioned object is one in which a reinforcing thread is embedded in a wound form in the outermost layer of a hose wall having a laminated structure and is reinforced. It is characterized in that protrusions are formed on the surface of the outermost layer in a mesh pattern corresponding to the embedded state of the yarn. Then, in order to improve the appearance of the hose, a coloring agent or the like is mixed in the outermost layer to make it opaque. Further, in order to generate a ridge and increase the pressure resistance of the hose, the thickness of the reinforcing yarn is increased and the twisting is strengthened. A pressure-resistant hose with an algae preventive function according to the present invention for achieving the above object, in a pressure-resistant hose having a hose wall of a laminated structure, a white layer formed in the innermost layer and an algae formed outside the white layer, Which is a layer made of a colored material for hiding the color of the black layer and a reinforcing layer wound in a mesh shape on the surface of the black layer, wherein the mesh pattern of the reinforcing thread is projected on the surface of the hose. A colored layer is formed outside the black layer so as to stand out as a strip.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to FIGS. As shown in the partially broken perspective view of FIG. 1 and the partial longitudinal sectional view of FIG. 2, the pressure-resistant hose A of this embodiment has an innermost layer 1 which is a main part thereof, and an intermediate layer 2 around which a reinforcing yarn 4 is wound. , And reinforcing thread 4
It has a three-layer structure of the outermost layer 3 in which is embedded.

Then, on the surface of the outermost layer 3, the portion pushed outward by the reinforcing thread 4 swells as shown in the drawing, so that a mesh-shaped ridge a is raised.

The innermost layer 1, the intermediate layer 2 and the outermost layer 3 are made of a resin material such as polyvinyl chloride. The reinforcing yarn 4 is made of synthetic fiber or the like.

Even if the material of the outermost layer 3 is not transparent or semi-transparent like the conventional pressure-resistant hose B, the reticulated yarn 4 appears at first glance even if it is a general consumer because the mesh pattern is raised. You can confirm that it is buried. Therefore, the outermost layer 3 can be colored as desired so that the pressure-resistant hose A looks good. When the pressure-resistant hose A is added with an algae preventive function, the intermediate layer 2 is an impermeable black layer that prevents the generation of algae, and the outermost layer 3 is a colored layer that hides the color of the black layer. According to such a pressure-resistant hose with algae-proofing function, a black layer is prevented from appearing on the appearance of the hose with a three-layer structure that is smaller than the four-layer structure of the conventional example (see FIGS. 3 and 4), and moreover It becomes possible to recognize the presence of the reinforcing yarn simply by looking at the surface.

Further, according to the pressure-resistant hose A, since the mesh-shaped ridges a are projected on the surface of the hose, the adjacent hoses do not stick to each other when they are wound and rewound on the hose reel, You will be able to perform smooth take-up and rewinding operations. Further, the mesh-shaped protrusions a protruding on the outer periphery of the pressure-resistant hose A serve as a clue when the hose is gripped, which makes the hose easy to handle.

Next, regarding the reinforcing thread 4, unlike the prior art, it is not necessary to take care so that the portion where the reinforcing thread is embedded does not cause a ridge on the surface of the hose. On the contrary, the intention is to positively generate the ridge a. Therefore,
The reinforcing thread 4 has a stronger twist and an increased thickness as compared with the prior art. That is, as the reinforcing yarn 4, a twisted yarn having a stronger twist than the conventional reinforcing yarn 4 of the pressure resistant hose and having a yarn cross section close to a substantially circular shape is used.

Therefore, the reinforcing effect of the pressure resistant hose A by the reinforcing thread 4 can be remarkably enhanced. In addition, the mesh-shaped ridge a can be projected higher by an amount corresponding to the increased thickness of the reinforcing thread 4.

By thus thickening the reinforcing thread 4 and strengthening the twist, the reinforcing thread 4 is less likely to be deformed. Therefore, when the outermost layer 3 is extruded on the outer periphery of the intermediate layer 2 around which the reinforcing yarn 4 is wound, bubbles are likely to remain in the wedge-shaped spaces on both lower sides of the reinforcing yarn 4. Therefore, when the outermost layer 3 is molded, the inside of the molding cavity is vacuum-sucked so that the reinforcing yarn 4 and the intermediate layer 2 and the outermost layer 3 are firmly adhered to each other.

In the above embodiment, the laminated structure of the pressure-resistant hose A is merely an example, and is not limited to the three-layer structure.

[0015]

As is clear from the above description, the pressure-resistant hose according to the present invention exhibits the following practically excellent effects as compared with the conventional arts exemplified at the beginning. (A) A mesh-like streak is protruding on the outer surface of the hose. (B) Therefore, even if the outermost layer is not made transparent, general consumers and distributors can confirm that it is a pressure-resistant hose at first glance. (C) In order to improve the appearance of the pressure-resistant hose, the outermost layer can be freely colored. (D) It is possible to freely increase the thickness of the reinforcing yarn and strengthen the twisting without worrying about the occurrence of ridges in the outermost layer. (E) The compressive strength of the hose can be greatly increased accordingly. (F) By providing the mesh-shaped protrusions on the surface of the hose, the hoses are prevented from sticking to each other, and the winding / rewinding operation on the hose reel can be performed smoothly. (G) The hose has a good feel when gripped, and the ridges of the hose play a role of preventing slippage. (H) Since the thickness of the outermost layer may be thinner than the thickness of the reinforcing yarn, the material cost can be saved and the weight of the hose can be reduced accordingly.

[Brief description of drawings]

FIG. 1 shows an embodiment of the present invention and is a partially cutaway perspective view of a pressure resistant hose.

FIG. 2 is a partial vertical sectional view of the pressure resistant hose.

FIG. 3 is a view corresponding to FIG. 1 showing a conventional example.

FIG. 4 is a view equivalent to FIG.

[Explanation of symbols]

A pressure resistant hose 1 innermost layer 2 Middle class 3 outermost layer 4 Reinforcing yarn a ridge B Conventional pressure-resistant hose 20 Reinforcing yarn 21 First Layer 22 Second layer 23 Third Layer 24 Fourth Layer

Claims (4)

[Claims] 1. A hose wall having a laminated structure in which a reinforcing thread is embedded in a wound form, wherein a protrusion is formed in a mesh pattern corresponding to the embedding state of the reinforcing thread, and the surface of the outermost layer. A pressure-resistant hose characterized by being produced in the. 2. The pressure-resistant hose according to claim 1, wherein a colorant or the like is mixed into the outermost layer to make the hose opaque so as to improve the appearance of the hose. 3. The pressure-resistant hose according to claim 1, wherein the thickness of the reinforcing thread is increased and the twisting is strengthened in order to generate a ridge and to increase the pressure-resistant strength of the hose. 4. A pressure-resistant hose having a laminated hose wall, a white layer formed as an innermost layer, a black layer formed outside the white layer to prevent algae generation, and a surface of the black layer. A reinforcing thread wound in a mesh, and a layer made of a colored material that hides the color of the black layer,
A pressure-resistant hose with an algae-proofing function, comprising: a colored layer formed on the outside of the black layer so that the mesh pattern of the reinforcing thread is projected on the surface of the hose as a protrusion.