| 摘要 |
PROBLEM TO BE SOLVED: To reduce surface pressure between a rubber hose and a pipe, so as to prevent reduction of sealing property by setting the wall thickness of an inner rubber layer and an outer rubber layer so as to satisfy a specified condition. SOLUTION: When the inner diameter of an inner rubber layer is identified as (d), the wall thickness of the inner rubber layer is identified as t1, and the wall thickness of an outer rubber layer is identified as t2, respective wall thickness of the inner rubber layer and the outer rubber layer is set so as to satisfy the conditions of 0.36d<=(t1+t2), and 0.55(t1+t2)<=t1. As a result, in an using condition in which a pipe made of metal or resin is inserted into a rubber hose, and the outer periphery of an end part of the rubber hose is fastened by a hose clamp, nonuniform in the pipe circumferential direction is improved in surface pressure between the rubber hose and the pipe. Even if compression permanent distortion is generated on the rubber hose due to thermal deterioration for reducing surface pressure, a part where surface pressure is locally and markedly reduced is not generated, so that sealing property is not impaired due to thermal deterioration on the rubber hose.
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