JPH0334539Y2 - - Google Patents

Description

[Detailed description of the invention] (Industrial application field) This invention relates to a flexible hose made of synthetic resin.
More specifically, the present invention is an improvement of a flexible hose used for shower hoses, etc., which has a linear or band-shaped reinforcing body made of metal or synthetic resin built into it in a spiral shape.

(Prior art) Generally, hoses made of flexible synthetic resin have good flexibility and are used in various fields, but in applications where pressure is applied to the hose, reinforcing members are built-in to withstand pressure. A hose with improved durability is used.

Flexible hoses with a built-in reinforcing member include those in which a metal or synthetic resin wire or band is wound spirally within the wall thickness of the hose, and the reinforcement of the wire or band is If the hose is integrally glued and built into the wall thickness of the hose, the flexibility of the hose will be reduced. In addition, if the reinforcing body is built in separately from the hose in order to prevent a decrease in flexibility, the adhesive part between the inner tube 1' and the outer tube 2' constituting the hose has a spiral shape, as shown in Fig. 4. Therefore, the adhesive strength between the inner and outer tubes is weak, and moreover, the helical reinforcing member that is built in and separated from the hose springs up (resilient force) at the cut end. However, there is a problem when a peeling phenomenon occurs at the adhesive part of the inner and outer tubes. Moreover, the above-mentioned springing up of the end of the reinforcing body obstructs the rotation of the tightening nut when the hose is inserted and connected to a connecting fitting such as a hose joint.

(Problems to be solved by the invention) In view of the above-mentioned conventional circumstances, the present invention is a flexible hose with a built-in reinforcing body, which has strong adhesive strength between the inner and outer tubes, and is reinforced at the cut end surface. The purpose is to provide a hose that does not cause the body to jump up.

(Means for solving the problem) The technical means of the present invention for solving the above problem is to make the reinforcing body built in between the inner and outer pipes of the hose non-adhesive to the inner and outer pipes. The outside of the reinforcing body is coated with a film made of a material that is non-adhesive to the reinforcing body and has good adhesion to the inner and outer tubes, and this reinforcing member is formed in a spiral shape between the inner and outer tubes. At the same time, the outer surface of the outer tube is made flat.

(Function) The reinforcing member wound spirally between the inner and outer tubes that make up the hose is made of a reinforcing body and a coating made of a material that is non-adhesive to the reinforcing body and has good adhesion to the inner and outer tubes. Due to this formation, the inner and outer tubes are bonded together through the coating of the reinforcing member, and the reinforcing body is separated from the coating and can freely move in the length direction.

(Embodiment) An embodiment of the present invention will be described below based on the drawings. The hose includes an inner tube 1 and an outer tube 2 made of a flexible synthetic resin material, such as vinyl chloride resin. 1 and 2, and a reinforcing member 3 that is spirally wound and built in between.

The reinforcing member 3 includes a reinforcing body 4 made of a synthetic resin material that does not adhere to the synthetic resin material of the inner tube 1 and the outer tube 2, such as polypropylene, polyamide, etc., or a metal material in the form of a line or band, and this reinforcing body. Synthetic resin material that is non-adhesive to 4 and has good adhesion to the inner and outer tubes 1 and 2, such as vinyl chloride resin that is the same material as the inner and outer tubes 1 and 2, or polyurethane, polyester, or adhesive resin. The reinforcing body 4 is free from the coating 5 and is movable, and the coating 5 is bonded and integrated with the inner tube 1 and the outer tube 2, and the outer tube 2
The outer surface of shall be flat.

Furthermore, the reinforcing member 3 is not limited to a structure in which a reinforcing body 4 made of a single piece of synthetic resin or metal is coated with a coating 5, but may have a structure that improves the aesthetic appearance. That is, as shown in FIG. 3, a metal foil band 6 such as aluminum foil or stainless steel foil is placed on the top surface of a reinforcing body 4 formed in a band shape from a synthetic resin material, and both are coated with a transparent film 5. Make the metal color of the foil visible from the outside. Note that the metal foil strip 6 may be embedded in the intermediate portion of the transparent reinforcing body 4.

In the figure, reference numeral 7 denotes reinforcing warp yarns attached to the outer peripheral surface of the inner tube 1 along the axis at equal intervals in the circumferential direction.

Since the flexible hose configured as described above has a flat outer surface, even if dust or the like adheres to the outer surface, it can be easily wiped off.

Furthermore, when the hose is bent, since the outer tube 2 and reinforcing member 3 are bonded and integrated on the outside, it is difficult to break due to the elongation of the inner tube 1, and wrinkles naturally occur on the inside.
It fits between the pitches of the reinforcing member 3 and becomes a cushion, improving flexibility.

(Effects of the invention) As detailed above, the flexible hose of the invention has the following features:
A reinforcing body spirally wound between the inner and outer tubes is formed of a material that does not adhere to the inner and outer tubes, and the outside of the reinforcing body is formed of a material that is non-adhesive to the inner and outer tubes. It is coated with a film with good adhesion.

Therefore, it is possible to reliably prevent the inner and outer tubes from peeling off from each other, and it is also possible to prevent the reinforcing member from jumping up at the end face of the hose, which has the advantage of improving the connectivity with the hose joint. Further, since the outer surface of the outer tube is made flat, dust does not accumulate over a long period of time, and even if it does adhere, it can be easily wiped off, so it has the advantage of being able to maintain a clean state for a long period of time.

Furthermore, since the reinforcing body is free and not bonded to the coating, sufficient flexibility of the hose is ensured.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view showing an embodiment of the hose of the present invention, Fig. 2 is a sectional view taken along line 2-2 in Fig. 1, and Fig. 3 is a partially cutaway front view showing a modification of the reinforcing member. 4 are partially cutaway front views showing the conventional structure. In the figure, 1... inner tube, 2... outer tube, 3... reinforcing member, 4... reinforcing body, 5... coating.

Claims (1)

[Scope of utility model registration request] On the outside of the flexible synthetic resin inner tube, a reinforcing body made of a material that is non-adhesive to the inner tube is coated with a reinforcing body made of a material that is non-adhesive and has good adhesion to the inner tube. A flexible reinforcing member coated with a coating is wound spirally, and an outer tube made of synthetic resin that has good adhesion to the coating of the reinforcing member is attached to the outside of the reinforcing member with the outer surface flattened. sex hose.