JP2001108161A - Pressure proof hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive pressure proof hose which is increased in pressure proofing property and twist resistance and keeps flexibility of a tube. SOLUTION: A reinforcing material 3 for covering a tube 2 is formed by two kinds of bundles of wires, that is, the bundle of metallic wires 4 and the bundle of plastic wires 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-resistant hose used for a hydraulic system such as a domestic water supply pipe or a hot / cold water transport system for a water heater.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional pressure-resistant hose. The hose 1 includes a flexible tube 2 and a reinforcing member 3 covering the tube 2. Tube 2 is easy to attach,
In addition, we use a highly flexible one for ease of use. That is, the tube 2 is soft and easily bent. However, the tube 2 expands when a high water pressure is applied. Therefore, the reinforcing member 3 is provided for the purpose of increasing the pressure resistance of the tube 2. Further, the reinforcing material 3 is
It has a structure in which a plurality of wire bundles 9 are knitted in a cloth shape. The wire bundle 9 constituting the reinforcing member 3 is a bundle of a plurality of filaments. In this way, the single bundle 9 is easier to knit than the discrete filaments, and the knitting efficiency is improved when the reinforcing member 3 is formed.

In general, the reinforcing member 3 is constituted by either a metal wire bundle or a plastic wire bundle. For example, in the case of the reinforcing member 3 composed of a metal wire bundle, the tube 2 can be firmly protected by the characteristics of the metal. That is, the hose 1 using the metal wire bundle
Can withstand high water pressure. Moreover, the hose using the metal wire bundle is hard to be twisted. If the hose is twisted, the deterioration proceeds from the twisted portion, and the untwisted portion extends the life of the hose. Here, the metal wire bundle means that all the filaments constituting the wire bundle are metal filaments.

[0004] On the other hand, a plastic wire bundle means that all filaments constituting the wire bundle are plastic filaments. In the case of a plastic wire bundle, since the flexibility is higher than that of a metal wire bundle, the hose 1 using the plastic wire bundle is easy to bend and easy to install. In addition, it is light and convenient to carry, and has good sliding properties, so that when dragging, there is little friction and dragging is easy. Therefore, the hose 1 using the reinforcing member 3 made of a plastic wire bundle is easy to handle. Moreover, since the plastic wire bundle 9 is cheaper than the metal wire bundle, the entire hose 1 using the plastic wire bundle is reduced in cost.

[0005]

SUMMARY OF THE INVENTION A metal wire bundle is connected to a reinforcing material 3.
The pressure-resistant hose 1 used in the above is inflexible, so it is hard to bend compactly and is heavy. Therefore, there is a problem that the operability of the hose 1 is deteriorated.
In addition, the metal wire bundle has a high cost, leading to an increase in the cost of the entire hose 1. On the other hand, the pressure-resistant hose 1 in which the plastic wire bundle is used for the reinforcing material 3 has a lower pressure-resistant strength than the hose in which the metal wire bundle is used for the reinforcing material 3.
Further, since the coefficient of thermal expansion due to the temperature rise is high, the reinforcing material 3 is elongated, and the strength of the hose 1 is reduced. further,
The hose 1 using the plastic wire bundle is flexible and easily bends, but has a problem that the hose 1 is twisted and deteriorated and cut therefrom.

As described above, in the conventional pressure-resistant hose, the above-described problems occur in both cases of using the metal wire bundle and the plastic wire bundle for the reinforcing member 3. An object of the present invention is to cover the surface of a tube 2 with a reinforcing material 3 to improve pressure resistance and torsion resistance, maintain the flexibility of the tube 2, and reduce the cost of an inexpensive pressure-resistant hose 1.
It is to provide.

[0007]

According to a first aspect of the present invention, there is provided a pressure-resistant hose in which a reinforcing member is constituted by a wire bundle in which a plurality of filaments are connected in a width direction and the surface of a tube is covered with the reinforcing member. It is characterized by comprising a plastic wire bundle and a metal wire bundle. According to a second aspect of the present invention, in a pressure-resistant hose in which a plurality of filaments are connected in the width direction to form a wire bundle and the surface of the tube is covered with the reinforcing material, at least one wire bundle is made of a plastic filament and a metal wire. It is characterized in that it is a mixed wire bundle composed of two types of filaments.

A third invention is characterized in that the plastic filament is made of polyester. 4th
The invention is characterized in that the plastic filament is made of polyamide. A fifth invention is characterized in that the metal filament is made of steel.
The sixth invention is characterized in that the metal filament is made of galvanized steel.

[0009]

FIG. 1 shows a first embodiment of the present invention. The same components as those in the conventional example are denoted by the same reference numerals, and detailed description is omitted. In the first embodiment, the reinforcing member 3 covering the tube 2 is composed of both a metal wire bundle 4 and a plastic wire bundle 5.

The metal wire bundle 4 is made by bundling a plurality of metal filaments alone. As the metal filament, a filament made of steel or galvanized steel is used. Steel or galvanized steel is used for the metal filament because steel or galvanized steel is relatively inexpensive, has low rigidity, and is easy to knit compared to other metals. Especially galvanized steel is hard to rust,
It is easy to handle.

The plastic wire bundle 5 is made by bundling a plurality of plastic filaments alone. As the plastic filament, a polyester or polyamide filament is used. The use of polyester for plastic filaments has high physical strength such as pressure resistance, and polyester can be recycled from discarded PET bottles.
This is because environmental protection can be achieved. In addition, the reason why polyamide is used is that a self-lubricating property is high, so that it is easy to knit and a pressure-resistant hose with good slippage can be obtained. This embodiment is the same as the conventional example except that one reinforcing member 3 is formed using two kinds of wire bundles 4 and 5 made of metal and plastic.

Next, the features of the first embodiment will be described. When the metal wire bundle 4 and the plastic wire bundle 5 are knitted together to form the reinforcing material 3, the pressure resistance of the hose 1 is significantly improved. That is, the metal wire bundle 4 reinforces the relatively low pressure resistance and twist resistance of the plastic wire bundle 5. Furthermore, the pressure-resistant hose 1 makes use of the advantages of a light and flexible plastic wire bundle. In addition, since the metal wire bundle 5 plays the role of a bone and spirally covers the outside of the tube 2, the metal wire bundle 5 is flexibly bent and hardly broken. Further, the reinforcing member 3 can be produced at a lower cost as compared with the related art in which only the metal wire bundle is used.

According to the first embodiment, the pressure-resistant hose 1 has the advantages of both the pressure-resistant hose 1 reinforced with the metal wire bundle 4 and the pressure-resistant hose 1 reinforced with the plastic wire bundle 5, and also compensates for the mutual disadvantages. It is possible to provide. That is, the pressure-resistant hose 1 of this embodiment makes use of the advantages of the metal wire bundle 4 that is rich in pressure resistance and torsion resistance, and also has the advantages of the plastic wire bundle 5 that is lightweight, excellent in operability, and low in cost. Has both. The ratio between the metal wire bundle 4 and the plastic wire bundle 5 when knitting the reinforcing member 3 may be changed according to the use. For example, when the pressure-resistant hose 1 is used in a bent state, the ratio of the plastic wire bundle 5 may be increased. When the hose is used in a situation where the water pressure becomes extremely high, the ratio of the metal wire bundle 4 may be increased. Good.

FIG. 2 shows a second embodiment. The same components as those in the conventional example and the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted. In the second embodiment, a wire bundle is formed by a metal filament 7 and a plastic filament 8. This flux is referred to as a mixed flux 6. The reinforcing material 3 is formed by knitting a plurality of mixed wire bundles 6 each composed of two kinds of filaments 7 and 8 as described above. This is the same as the first embodiment, except that the mixed wire bundle 6 is constituted by two types of filaments.

Next, the features of the second embodiment will be described. By using the metal filament 7 and the plastic filament 8 as the mixed wire bundle 6, it is possible to obtain the mixed wire bundle 6 that makes use of the characteristics of metal and the characteristics of plastic. In other words, the hose 1 using the reinforcing material 3 knitted with the mixed wire bundle 6 has a high pressure resistance, a high twist resistance, a high flexibility, a high slipperiness, and is an inexpensive hose.

Further, since the metal filaments 7 are evenly arranged on the surface of the tube 2, the entire tube 2 is protected with uniform strength. Therefore, even when the tube 2 expands due to heat or pressure, the hose 1 does not expand locally and the hose 1 is not distorted. In the second embodiment, the surface of the tube 2 can be uniformly reinforced as described above, which is particularly effective when hot water is used. Also,
All of the wire bundles constituting the reinforcing member 3 may be mixed wire bundles 6, or only some wire bundles may be mixed wire bundles 6 and other wire bundles may be metal wire bundles 4 or plastic wire bundles 5.

[0017]

According to the first aspect of the present invention, the reinforcing member is constituted by two types of wire bundles, a metal wire bundle and a plastic wire bundle.
The whole hose has high pressure resistance, torsion resistance, and heat resistance, and is light, flexible, easy to handle, and inexpensive. Further, since the metal wire bundle spirally covers the tube, the metal wire bundle is flexibly bent and hardly broken. In the second invention, a mixed wire bundle is constituted by two types of filaments, a metal filament and a plastic filament. Since this mixed wire bundle is used as a reinforcing material for a hose, the pressure-resistant hose is excellent in pressure resistance and torsion resistance, and is light, flexible, easy to handle, and inexpensive. In addition, since the metal filament uniformly covers the surface of the tube, uniform strength of the hose is maintained.

In the third and fourth aspects, since the plastic filament is made of polyester or polyamide, the physical strength such as pressure resistance is higher than that of other plastic products. In particular, according to the third aspect, it is possible to recycle from a discarded PET bottle or the like, so that environmental protection can be achieved. In the fifth and sixth inventions, since the metal filament is made of steel or galvanized steel, it is relatively inexpensive and easy to knit as compared with the case where it is made of other metal products. In particular, according to the sixth aspect, it is easy to handle with little rust.

[Brief description of the drawings]

FIG. 1 is a partially sectional perspective view of a pressure-resistant hose of a first embodiment.

FIG. 2 is a partially sectional perspective view of a wire bundle according to a second embodiment.

FIG. 3 is a partially sectional perspective view of a conventional pressure-resistant hose.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hose 2 Tube 3 Reinforcement 4 Metal wire bundle 5 Plastic wire bundle 6 Mixed wire bundle 7 Metal filament 8 Plastic filament 9 Wire bundle

Claims (6)

[Claims] 1. A pressure-resistant hose in which a reinforcing member is knitted with a wire bundle in which a plurality of filaments are connected in a width direction and the reinforcing material covers the surface of a tube, wherein the reinforcing material is made up of a plastic wire bundle and a metal wire bundle. Composed pressure hose. 2. A pressure-resistant hose in which a plurality of filaments are knitted with a wire bundle connected in the width direction, and wherein at least one wire bundle is made of a plastic filament and a metal filament, Pressure hose with a mixed wire bundle consisting of two types of filaments. 3. The pressure-resistant hose according to claim 1, wherein the plastic filament constituting the plastic wire bundle is made of polyester. 4. The plastic filament constituting the plastic wire bundle is made of polyamide.
And 2. The pressure-resistant hose according to 2. 5. The pressure-resistant hose according to claim 1, wherein the metal filament constituting the metal wire bundle is made of steel. 6. The metal filament constituting the metal wire bundle is made of galvanized steel.
The pressure-resistant hose described.