JPH0440067Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to a hose that is required to be resistant to internal pressure, negative pressure, external pressure, flexibility, etc.

(Conventional technology and its problems) Conventional structures of this type of reinforced hose include those in which a hard reinforcing material is attached to the outside of a soft hose body in a spiral shape, and a spiral shape made of metal wire or hard resin wire. There is a method in which cloth, film, and tube are sequentially wound and laminated on the outside of the inner wire, and the outer wire is wound on the outermost side between the pitches of the inner wire, but in the former case, the reinforcement is insufficient. When exposed to direct sunlight and heated when used outdoors, it naturally deforms and becomes difficult to use, and the reinforcing material may break in cold regions.

In addition, in the latter case, since cloth is used on the inside, if the fluid penetrates, it cannot be washed away.
This makes it impossible to change the fluid being used, resulting in the inconvenience of having to replace the hose for each fluid used. Moreover, since it is composed only of film and wires, it is difficult to connect it to other equipment, and the outer wire in particular tends to loosen, so it is often impossible to install it on site, which poses difficulties in workability.

(Purpose of the invention) In view of the above-mentioned conventional circumstances, it is an object of the present invention to provide a hose that has strength against internal and external pressures and has excellent flexibility.

(Structure of the invention) The technical means taken by the invention to achieve the above object is to attach a large number of resin films to the outside of a flexible inner tube with a smooth inner surface and a reinforcing material in a spiral shape. The film is wound in layers, and a reinforcing wire is placed on top of the film between the pitches of the reinforcing material of the inner tube and tightened in a spiral manner, and the outside of the reinforcing wire is covered with an outer sheath made of soft synthetic resin. shall be.

The resin film to be wound on the outside of the inner tube can be wound by stacking a plurality of sheets in advance and winding them around the inner tube, or by forming a film into a tape and wrapping it with some overlap. Any type of taping, such as rotating, may be used.

(Function) According to the above structure, the several layers of resin films wound on the outside of the inner tube are tension-wound on the outer circumferential surface of the inner tube with reinforcing wires, and the inner tube is integrally provided with reinforcing material. and reinforced with reinforcing wire wrapped around the outside.
Furthermore, since the resin film wound around the outside of the inner tube is only tightened by the reinforcing wire, it can move freely in the axial direction without hindering the flexibility of the inner tube. It is something.

(Example) Hereinafter, an example of the present invention will be described based on the drawings. 1 is an inner tube, 2 is a resin film, 3 is a reinforcing wire, and the inner tube 1 is made of polypropylene, polyethylene, fluororesin, polyester, etc. It is formed into a hollow tube shape with a smooth inner surface using a soft resin material such as vinyl chloride, and a reinforcing material 4 is spirally attached to the outer surface of the tube.

The reinforcing material 4 has a metal wire core material 4a covered with a hard resin or semi-hard resin jacket material 4b. A recess 5 is formed in a spiral shape between the pitches of the material 4.

A plurality of resin films 2 are wound around the outer peripheral surface of the inner tube 1 having the above structure, and the films 2 are made of, for example, polypropylene, polyethylene, Teflon resin, or the like. Moreover, the winding of the film 2 is performed by making the film into a tape shape,
The film tape may be partially overlapped and wound like taping, and the winding direction may not be in one direction, but may be wound in a right-handed and left-handed manner alternately to prevent twisting of the hose.

Note that warps, braids, etc. can be used in combination between the resin film 2 and the inner tube 1 depending on the desired hose.

The reinforcing wire 3 spirally wound around the outside of the resin film 2 is made of a metal wire or a synthetic resin wire. The resin film 2 is wound spirally in the same direction as the reinforcing material 4, thereby fixing and holding the resin film 2 on the outside of the inner tube 1.

Further, the outer surface of the reinforcing wire 3 is made to protrude outward from the outermost circumferential surface of the resin film 2 wound around the outside of the inner tube 1, so that even if the hose is dragged, the resin film 2 will not move. It is designed to prevent it from being scratched directly.

Further, as mentioned above, the wire constituting the reinforcing wire 3 may of course be a single piece of metal wire or resin wire, but it is of course also good to use a composite body in which a metal wire is coated with a synthetic resin. When a metal wire having a property is used, the reinforcing wire 3 can be used as a lead wire for electrically operating a submersible pump connected to a hose, a valve body, etc.

The outer side of the reinforcing wire 3 is coated with an outer sheath 6 made of a soft synthetic resin material as necessary to suppress the end of the reinforcing wire 3 from jumping up, improve the ease of handling the hose end, and improve the connectivity with the metal fittings. I can do it.
Of course, if the outer cover 6 is applied, the resin film 2
Since the surface is completely covered, the film 2 can be reliably protected.

The inner tube 1 described above has oil resistance, chemical resistance, and
It goes without saying that heat resistance, cold resistance, etc. can be improved.

(Effects of the invention) As detailed above, the reinforced hose of the present invention has a flexible inner tube with a smooth inner surface and a reinforcing material in a spiral shape, and has multiple layers of resin film wound around the outside. Since the reinforcing wire is placed on top of the film between the pitches of the reinforcing material of the inner tube and tightened in a spiral manner, it is strong against internal pressure, external pressure, and negative pressure, and has sufficient flexibility. We can provide hoses with

Furthermore, by making the outer surface of the reinforcing wire protrude outward from the outermost circumferential surface of the resin film, the resin film will not be directly rubbed on the ground or concrete surface even when the hose is dragged. It protects the film and maintains its durability.

Furthermore, since the outer sheath is coated on the outside of the reinforcing wire, it is possible to prevent the end of the reinforcing wire from jumping up, improving the ease of handling the hose end, and also ensuring that the band can be tightened when connected to metal fittings, etc. It is possible to do this and increase connectivity.

Therefore, it is possible to provide a highly practical reinforced hose that can solve the drawbacks of the conventional structure.

[Brief explanation of drawings]

The drawing is a partially cutaway front view showing an embodiment of the reinforced hose of the present invention. In the figure, 1...inner tube, 2...resin film, 3
... Reinforcement wire rod, 4 ... Reinforcement material.

Claims (1)

[Scope of utility model registration request] A flexible inner tube with a smooth inner surface and a spiral reinforcing material is wound with multiple layers of resin film on the outside, and a reinforcing wire is placed on top of the film between the pitches of the reinforcing material in the inner tube. A reinforced hose that is positioned and tightened in a spiral manner, and the outer side of the reinforcing wire is covered with a jacket made of soft synthetic resin.