JPH11108262A - Multiple string hose - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a multiple string hose from twisting due to pressure at using it by winding reinforing wire rods on adjoining hose main bodies respectively in the opposite helical directions, in a multiple string hose in which a plurality of helically reinforced hoses helically winding reinforcing wire rod on the hose main bodies are provided in parallel and the contact parts are fixedly secured. SOLUTION: A hose main body 1 of helically reinforced hose A is constituted of an inner tube 1a and an outer tube 1b, reinfocing wire rod 2 is wound on the outer circumferential face of the inner tube 1a in the right-handed helical direction, and is covered with the outer tube 1b to manufacture a helically reinforced hose A1 of right-handed winding. Further a helically reinforced hose A2 of left-handed winding winding the reinforcing wire rod 2 in the left-handed helical direction thereon is manufactured. These helically reinforced hoses A1, A2 are arranged in parallel, and the contact part contacting each other at their one parts is fixedly secured to manufacture a multiple string hose B. Hereby, even if the multiple string hose B elongates due to pressure at using it, force of the respective reinforcing wire rods acting in the opposite direction to the winding direction are cancelled between the adjoining helically reinforced hoses A1, A2, and hence it is prevented from twisting.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multiple hose which is used when a plurality of fluids are supplied or when a plurality of different flow paths such as a supply flow path and a return flow path are required. A spiral reinforcing hose is formed by spirally winding a reinforcing wire on a flexible hose body, and a plurality of the spiral reinforcing hoses are arranged in parallel so that a part thereof respectively abuts each other in the axial direction. The present invention relates to a structure in which a contact portion is fixed.

[0002]

2. Description of the Related Art Conventionally, as a multiple hose of this type, a spiral reinforcing hose A 'is formed by spirally winding a reinforcing wire 2' around the outer peripheral surface of a hose body 1 'as shown in FIG. In some cases, two spiral reinforcing hoses A 'each having a reinforcing wire wound in the same spiral direction are fixed in parallel in a subsequent process. These helical reinforced hoses are supplied with a fluid during use and apply pressure, whereby the hoses are stretched in the axial direction. With this stretch, a force acts in a direction opposite to the winding direction of the reinforcing wire from the structure, It has the property of twisting in the opposite direction. Further, when the spiral reinforcing hose is formed by winding a metal steel wire as a reinforcing wire, such as a spring hose, a springback (a phenomenon in which when a plastic material is coil-bent, the amount of bending is reduced from the amount of bending after unloading). Accordingly, the hose has a property of being twisted in a direction opposite to a winding direction of the reinforcing wire after the hose is formed.

[0003]

However, in such a conventional multiple hose, the reinforcing wires are wound in the same spiral direction with respect to the hose bodies of the adjacent spiral reinforcing hoses. When the reinforcing hoses are simultaneously stretched by the pressure at the time of use, a force acts in the direction opposite to the winding direction of the reinforcing wire, respectively, and these twists are synergistically further promoted, and as a result, the entire multiple hose is axially moved in the axial direction. Twist.
Such a torsion of the multiple hose due to the pressure during use not only hinders the use of the multiple hose by spirally rising, but also when the base end of the multiple hose is attached to a device such as a water spout. In this case, a strong rotational force acts on the mounting part, which may cause fluid leakage or hose detachment. In this mounted state, furthermore, hold the manual tool to which the tip of the multiple hose is connected and move In the case of moving piping, there is a problem that the hand tool rotates and is very dangerous.
In particular, when manufacturing multiple hoses by fixing a plurality of spiral reinforcing hoses wound with a metal steel wire as a reinforcing wire in parallel, sufficient consideration should be given to the amount of twisting of each spiral reinforcing hose due to springback. Otherwise, the metal steel wire wound in the same spiral direction with respect to the hose body of the adjacent spiral reinforcing hose will be twisted in the same direction by springback, so that the entire multiple hose will be in the axial direction even when not in use. Twist. Such a twist of the multiple hose when not in use makes the outer shape of the multiple hose thicker, so that it is difficult to perform piping in a narrow gap, and it is difficult to perform a flat bending process along a flat surface, and it is quick. There is a problem that it is difficult to perform a simple construction, or a long length of the hose cannot be wound around the hose winding machine, and the usability is poor.

[0004] An object of the present invention is to prevent twisting due to pressure during use. Further, the invention of claim 2 aims at preventing twisting when not in use, in addition to the object of the invention of claim 1.

[0005]

In order to achieve the above-mentioned object, according to the first aspect of the present invention, a reinforcing wire is wound around an adjacent hose body in a reverse spiral direction. It is characterized by the following. A second aspect of the present invention is characterized in that a configuration in which the reinforcing wire is a metal steel wire is added to the configuration of the first aspect of the invention.

[0006]

According to the first aspect of the present invention, the reinforcing wire is wound in the opposite helical direction to the hose body of the adjacent helical reinforcing hose, so that even if the adjacent helical reinforcing hose is extended by the pressure during use, The force acting in the opposite direction to the winding direction of each reinforcing wire cancels out between the adjacent spiral reinforcing hoses. Further, in the invention of claim 2, a configuration in which the reinforcing wire is a metal steel wire is added to the configuration of claim 1, so that the metal steel wire of the adjacent spiral reinforcing hose is reversed in the winding direction by springback. These twisting forces cancel each other out between adjacent helical reinforcement hoses even if twisting in the opposite direction.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In this embodiment, as shown in FIG. 1, a hose body 1 of a spiral reinforcing hose A is composed of a single layer of an inner tube 1a and an outer tube 1b, and a reinforcing wire 2 is wound around the outer surface of the inner tube 1a in a right spiral direction. By turning it and covering it with the outer tube 1b, a right-handed helical reinforcing hose A1 is manufactured, and the reinforcing wire 2 is wound around the outer peripheral surface of the inner tube 1a in the left helical direction, and this is wound on the outer tube. By coating with 1b, a left-handed spiral reinforced hose A2 was produced. And
In the subsequent process, the two helical reinforcing hoses A1 and A2, in which the reinforcing wire 2 is wound in the opposite helical direction, are arranged in parallel so that a part thereof respectively abuts each other in the axial direction.
The contact portion in the axial direction was fixed by fixing means to produce a multiple hose B.

The reinforcing wire 2 is made of a metal steel wire or a hard synthetic resin. In the right-handed spiral reinforcing hose A1 and the left-handed spiral reinforcing hose A2, the reinforcing wires 2 of the same material and the same diameter are arranged at the same pitch. Wind up.

As a means for fixing the right-handed spiral reinforcing hose A1 and the left-handed spiral reinforcing hose A2, a conventional well-known adhesive material is used, or welding is performed by heat welding or the like.

Next, two spiral reinforcing hoses A1 and A2 in which the reinforcing wire 2 is wound in the reverse spiral direction shown in FIG.
2. A conventional hose manufactured by fixing a multiple hose B of the present invention manufactured by fixing the helical wire and two helical reinforcing hoses A ', A' each having a reinforcing wire 2 'wound in the same spiral direction shown in FIG. A test for comparison with the multiple hose B ′ was conducted.

As a test sample of the multiple hose B of the present invention shown in FIG. 1, the same size (inner diameter 15 mm, outer diameter 2
2 mm and a length of 15 m) are prepared by fixing a right-handed spiral reinforcing hose A1 and a left-handed spiral reinforcing hose A2, which are the same as the test sample of the conventional multiple hose B 'shown in FIG. Two helical reinforced hoses A 'of the same size (inner diameter: 15 mm, outer diameter: 22 mm, length: 15 m) were fixed.

The test conditions are as follows. Both of these test items are placed on the floor, and a non-pressure state where no fluid is supplied at room temperature and a pressurized state where a specified pressure (5 Kg / cm ² , 10 Kg / cm ² ) is applied In each case, the number of twists was measured. In the above-mentioned pressurized state, the tip of both specimens is end cap (blind plug)
, And air was supplied from the respective base ends by a compressor at a specified pressure.

As a result of the above test, under a pressurized state of 10 Kg / cm ² , both test specimens each extend about 3 meters, and only the test specimen of the conventional multiple hose B ′ shown in FIG. A part of the floor rising spirally from the floor was seen. Also,
Under no pressure, 5 kg / cm ² and 10 kg / cm ² , the number of twists was as follows.

[0014]

[Table 1]

Therefore, even if the multiple hose B of the present invention shown in FIG. 1 is extended due to the pressure during use, the force acting in the direction opposite to the winding direction of each reinforcing wire 2 is applied to the adjacent spiral reinforcing hose A1, A2 cancels out each other, so that no twisting occurs and even in a pressurized state of 10 kg / cm ² , as in the conventional multiple hose B ′ shown in FIG. It turned out that the hose did not rise spirally from the floor.

In the embodiment described above, the case where the hose body 1 is composed of one layer of the inner tube 1a and the outer tube 1b is shown. However, the present invention is not limited to this. Or a structure having neither the inner tube nor the outer tube. Further, two helical reinforcing hoses A1 and A2 in which the reinforcing wire 2 is wound in the reverse spiral direction are fixed, but the present invention is not limited to this, and the spiral reinforcement in which the reinforcing wire 2 is wound in the reverse spiral direction is fixed. Three or more hoses may be secured.

[0017]

As described above, according to the first aspect of the present invention, the reinforcing wire is wound in the opposite helical direction to the hose body of the adjacent helical reinforcing hose so that it can be used at the time of use. Even if the adjacent helical reinforcement hoses are extended by the above pressure, the forces acting in the direction opposite to the winding direction of each reinforcement wire cancel each other out between the adjacent helical reinforcement hoses, so that the torsion due to the pressure during use can be prevented. Therefore, compared to the conventional spiral reinforcing hoses in which the reinforcing wire is wound in the same spiral direction with respect to the hose body of each of the adjacent spiral reinforcing hoses, no twisting occurs at the time of use, and the hose is used without rising spirally. easy. In addition, when the end of the multiple hose is attached to a device such as a water spout, no rotational force acts on the attachment portion, so that no accident such as fluid leakage or hose disconnection occurs. Further, in the case of a moving pipe in which a hand tool is moved in a hand, the hand tool can be used safely without rotating.

Further, the invention of claim 2 is in addition to the effect of the invention of claim 1, and even if the metal steel wire of the adjacent helical reinforcing hose tries to be twisted in the reverse direction of the winding direction by springback, these are contradictory. Since the directional forces cancel each other out between the adjacent spiral reinforcing hoses, it is possible to prevent twisting when not in use. Therefore, the metal steel wire wound in the same spiral direction with respect to the hose body of the adjacent spiral reinforcing hose is twisted by the spring back of the metal steel wire as compared with the conventional steel wire twisted in the same direction by the spring back. Even if a multiple hose is manufactured without sufficient consideration, the external shape of the multiple hose is not twisted as a whole and becomes thick, so it is easy to pipe even in a narrow gap and it is easy to bend along a flat surface In addition, it can be wound by a long length on a hose winding machine, and it is convenient to use.

[Brief description of the drawings]

FIG. 1 is a partially cutaway perspective view of a multiple hose showing one embodiment of the present invention.

FIG. 2 is a partially cutaway perspective view showing an example of a conventional multiple hose.

[Explanation of symbols]

 A Spiral reinforcement hose 1 Hose body 2 Reinforcement wire

Claims (2)

[Claims] 1. A spiral reinforcing hose (A) is formed by spirally winding a reinforcing wire (2) around a soft hose body (1), and a plurality of spiral reinforcing hoses (A), a part of which is formed. In the multiple hoses which are arranged in parallel so as to abut each other in the axial direction, and the contact portions in the axial direction are fixed, the reinforcing wire (2) is connected to the adjacent hose body (1) in the opposite spiral direction. Multiple hoses characterized by being wound up. 2. The multiple hose according to claim 1, wherein the reinforcing wire is a metal steel wire.