JP2013057364A - Hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensive hose configured to substantially completely prevent fluid leakage, and to provide a manufacturing method thereof.SOLUTION: The hose 100 includes, from the outside to the inside, an outer spiral wire 1, outer cloth 2, a film 3, an outer tube 4, a film 5, an inner tube 6, and an inner spiral wire 9. The cylindrical outer tube 4 and inner tube 6 are layered in a double form in the hose 100, thereby substantially completely preventing leakage of fluid flowing in the hose 100. The hose can be simplified in overall structure, and employs commercially available tubes for the outer tube 4 and the inner tube 6, thereby reducing the price.

Description

  The present invention relates to a hose for sending various fluids, and more particularly, to a hose configured by appropriately combining a film and a tube, and a method for manufacturing the hose.

In order to improve durability while maintaining flexibility, there is known a hose including spiral wires on the outer peripheral side and the inner peripheral side with an intermediate laminated body interposed therebetween.
Patent Document 1 describes an invention relating to a hose having a structure in which an inner tube core that functions as an inner spiral wire is embedded in the inner tube.
JP 2008-101634 A

By the way, the above-mentioned hose of Patent Document 1 can eliminate fluid leakage almost completely, and requires a high characteristic that the generation of turbulent flow can be suppressed by making the inside flat, even at a relatively high price. In a market that sells, it meets the needs.
However, although the above-mentioned characteristics may be deteriorated, it is not sufficient in a market where a low price is required.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a hose capable of substantially completely eliminating fluid leakage and a manufacturing method thereof.

  In order to solve the above-described problems of the prior art and achieve the above-described object, a hose according to a first aspect of the present invention includes an inner spiral wire and a first hose positioned so as to surround the inner spiral wire. 1 tube, a first film wound around the outer periphery of the first tube without a gap, a second tube positioned so as to surround the first film, and an outer periphery of the second tube A second film wound around the outer periphery of the second film, an outer cloth wound around the outer periphery of the second film without a gap, and an outer spiral wire wound around the outer periphery of the outer cloth.

Preferably, in the hose according to the first aspect of the present invention, the first tube is formed of polypropylene, polyethylene, or a fluororesin.
Preferably, the first tube of the hose according to the first aspect of the invention has higher strength than the second tube.
Preferably, the first tube and the second tube of the hose according to the first aspect of the invention are formed by overlapping a plurality of cylindrical members having substantially the same shape. There are more overlapping sheets than the second tube.
Preferably, in the hose according to the first aspect of the invention, the inner spiral wire and the first tube are directly joined.

  The hose manufacturing method of the present invention includes a first step of inserting an inner spiral wire inside the first tube, and a first film wound around the outer periphery of the first tube that has undergone the first step without any gap. A second step, a third step of inserting the first film that has undergone the second step into the inside of the second tube, and an outer periphery of the second tube that has undergone the third step. A fourth step of winding the film of 2 without gaps, a fifth step of winding the outer fabric without any gaps on the outer periphery of the second film after passing through the fourth step, and the outer fabric passing through the fifth step And a sixth step of winding the outer spiral wire around the outer periphery.

  According to the present invention, it is possible to provide a hose capable of substantially completely eliminating fluid leakage at a low cost and a method for manufacturing the hose.

It is a figure which shows an example of the structure of the hose which concerns on embodiment of this invention. It is the figure which expanded and showed the cross section of the hose shown in FIG. It is a figure for demonstrating the structure of the hose which concerns on other embodiment of this invention.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a view showing an example of the structure of a hose 100 according to an embodiment of the present invention, and a region indicated by a chain line shows a cross section in the radial direction of the hose.
FIG. 2 is an enlarged view of the cross section of the hose 100 shown in FIG.

  The hose 100 according to this embodiment includes an outer spiral wire 1, an outer cloth 2, a film 3, an outer tube 4, a film 5, an inner tube 6, and an inner spiral wire 9 from the outside toward the inside. Have

  The outer spiral wire 1 is an example of the outer spiral wire of the present invention, the outer cloth 2 is an example of the outer cloth of the present invention, the film 3 is an example of the second film of the present invention, and the outer tube 4 is It is an example of the 2nd tube of this invention, the film 5 is an example of the 1st film of this invention, the inner tube 6 is an example of the 1st tube of this invention, and the inner spiral wire 9 is this invention. It is an example of the inner spiral wire.

The outer spiral wire 1 is wound around the outer periphery of the outer cloth 2 in a spiral manner at equal intervals.
As the outer spiral wire 1, for example, a metal wire such as a galvanized copper wire or a stainless steel wire, or a resin wire (plastic or the like) can be used.
The outer cloth 2 is wound spirally around the outer periphery of the film 3 and is bonded with an adhesive.
The film 3 is wound around the outer periphery of the outer tube 4 without a gap and is bonded with an adhesive.
As a material of the film 3, for example, polyester, polypropylene, or polyamide fiber is used.

The outer tube 4 is positioned so as to surround the film 5 inside.
As a material of the outer tube 4, a resin such as polypropylene, polytetrafluoroethylene (PTFE), or polyvinyl chloride is used.

The film 5 is wound around the outer periphery of the inner tube 6 without a gap and is bonded with an adhesive.
As a material of the film 5, for example, polyester, polypropylene, or polyamide fiber is used.

The inner tube 6 is positioned so as to surround the inner spiral wire 9 inside.
As a material of the inner tube 6, for example, any material that has a certain degree of flexibility and can be integrally molded can be appropriately selected according to the type and properties of the fluid. For example, a resin such as polypropylene, polytetrafluoroethylene (PTFE), or polyvinyl chloride, polyethylene, or a fluororesin is used.
The inner tube 6 has higher strength than the outer tube 4 and is not easily torn. Specifically, the inner tube 6 is thicker than the outer tube 4.
For example, the outer tube 4 and the inner tube 6 are formed by overlapping a plurality of cylindrical members having substantially the same shape, and the inner tube 6 has a larger number of overlapping than the outer tube 4.

The inner spiral wire 9 is spirally wound at regular intervals so as to be positioned between the wires in the longitudinal direction of the outer spiral wire 1.
For the inner spiral wire 9, for example, a metal wire such as galvanized copper wire or stainless steel wire, or a resin wire (plastic or the like) can be used.

  Before the outer spiral wire 1 is wound, the outer tube 4 and the inner tube 6 have, for example, a cylindrical shape, but the outer spiral wire 1 is wound and the inner spiral wire 9 is adjacent to the spiral. Is pushed into a waveform as shown in FIG.

Next, a method for manufacturing the hose 100 having the above-described configuration will be described.
First, as a first step, a spiral inner spiral wire 9 is inserted inside the inner tube 6.
Next, as a second step, the film 5 is wound around the outer periphery of the inner tube 6 that has undergone the first step without a gap.

Next, as a third step, the film 5 that has undergone the second step is inserted inside the outer tube 4.
Next, as a fourth step, the film 3 is wound around the outer tube 4 that has undergone the third step without any gaps.
Next, as the fifth step, the outer cloth 2 is wound around the outer periphery of the film 3 that has undergone the fourth step without any gaps.
Next, as the sixth step, the outer spiral wire 1 is wound around the outer cloth 2 that has undergone the fifth step in a spiral manner so as to be positioned between the wires in the longitudinal direction of the inner spiral wire 9. Thereby, the hose 100 of FIG. 1 and FIG. 2 is obtained.

As described above, according to the hose 100, the leakage of the fluid flowing in the hose 100 can be almost completely eliminated by arranging the cylindrical outer tube 4 and inner tube 6 in a double manner.
Moreover, according to the hose 100, since the whole structure can be simplified and the commercially available thing of a simple form can be utilized as the outer tube 4 and the inner tube 6, cost reduction can be achieved.

  If the inner tube 6 is formed of a conductive material, such as a conductive resin, a static eliminating effect against static electricity can be obtained, and a fluid with a low flash point, for example, an organic solvent such as toluene or xylene can be passed.

  As mentioned above, although embodiment of this invention was described, this invention is not limited only to said form, Various modifications are included.

  For example, the structure of the covering member sandwiched between the outer spiral wire 1 and the inner spiral wire 9 is arbitrary as long as the outer tube 4 and the inner tube 6 are present. Can be arbitrarily changed according to the use of the hose.

  The cross-sectional structures of the outer spiral wire 1 and the inner spiral wire 9 are also arbitrary. For example, as shown in FIG. 3, the cross section of the inner spiral wire 9 may have a substantially triangular or semicircular shape with the flow path side being flat. Thereby, the flow of the fluid in the inner spiral wire 9 can be made smooth.

  The present invention can be applied to, for example, an industrial hose.

DESCRIPTION OF SYMBOLS 1 ... Outer spiral wire 2 ... Outer cloth 3 ... Film 4 ... Tube 5 ... Film 6 ... Tube 9 ... Inner spiral wire

Claims (6)

An inner spiral wire;
A first tube positioned so as to surround the inner spiral wire;
A first film wound around the outer circumference of the first tube without gaps;
A second tube positioned so as to surround the first film;
A second film wound around the outer periphery of the second tube without a gap;
An outer cloth wound around the outer periphery of the second film without a gap;
A hose having an outer spiral wire wound around the outer periphery of the outer fabric. The hose according to claim 1, wherein the first tube is formed of polypropylene, polyethylene, or a fluororesin. The hose according to claim 2, wherein the first tube has higher strength than the second tube. The first tube and the second tube are formed by overlapping a plurality of substantially identical cylindrical members,
The hose according to claim 3, wherein the first tube has a larger number of sheets to be superimposed than the second tube. The hose according to claim 4, wherein the inner spiral wire and the first tube are directly joined. A first step of inserting an inner spiral wire inside the first tube;
A second step of winding the first film around the outer circumference of the first tube that has undergone the first step without a gap;
A third step of inserting the first film after the second step into the second tube;
A fourth step of winding the second film around the outer circumference of the second tube that has undergone the third step without gaps;
A fifth step of winding an outer cloth around the outer periphery of the second film without passing through the fourth step;
A hose manufacturing method comprising: a sixth step of winding an outer spiral wire around the outer periphery of the outer cloth that has undergone the fifth step.