Hose

Abstract

A hose having both excellent flexibility and shape retainability and advantageous in construction efficiency and cost efficiency. The hose comprises hard synthetic resin reinforcement material (2) spirally fed and having, on both sides of the top part (2D) thereof in the tube axial direction, receiving surfaces (2a) and (2b) positioned on the radial inner side toward the end part thereof and a soft synthetic resin hose body for covering the spirally fed reinforcement materials (2). The reinforcement materials (2) are spirally fed in the state of the top parts being positioned on the radial outer side thereof, a soft synthetic resin tape material (3) is fed to the fed reinforcement (2), and while covering parts (3A) projected in a generally arc shape to the center of the reinforcement materials (2) by melting the tape material or with an adhesive agent.

Description

technical field [0001] The present invention relates to hoses used as flexible air-conditioning hoses, hoses for connecting various blowers and air supply and exhaust fans, hoses for guiding granules and powders, hoses for guiding liquids, etc. Hoses for guiding gases and liquids or granules and powders. In addition, hoses that guide gas, such as air-conditioning hoses and connection hoses, are generally called ducts. Background technique [0002] A catheter as an example of the above-mentioned hose is described. It is preferable that the catheter not only has light weight and shape retention, but also has flexibility. As a conventional catheter, it has been proposed to combine a synthetic resin coating material with a helical core. materials to form a spiral hose (for example, refer to Patent Document 1). [0003] Patent Document 1: Japanese Unexamined Patent Publication No. 8-296888 (refer to figure 1 ) [0004] In the above-mentioned Patent Document 1, since the synth...

AI Technical Summary

Problems solved by technology

By the way, if the material and thickness are taken into consideration to improve flexibility, the shape retention of the catheter will decrease, and it is difficult to satisfy both flexibility and shape retention with a wall of a flat shape as described above.

In addition, it is considered to make the wall into a bellows structure in order to improve flexibility. Since the inner surface of the duct cannot be flattened by the bellows structure, there will be a problem of high air resistance, and there is room for improvement.

[0005] In addition, the cross-sectional shape of the above-mentioned core material is not specified in the above-mentioned patent document, but the cross-sectional shape of most core materials is square or circular. In such square or circular core materials, it is difficult to ensure that the maximum bending angle is relatively large. , the duct that cannot be used in places with large bends must use a duct formed separately, which is disadvantageous in terms of construction and cost

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