| 摘要 |
PROBLEM TO BE SOLVED: To provide a flexible tube for an endoscope, capable of securely retaining prescribed dimensions. SOLUTION: One end of a spiral tube 24, whose pitch P<SB>1</SB>is 1.5 mm in the natural state without application of external force, is temporarily fixed to a rod-like member, and the spiral tube 24 is contracted in such a way that the other unfixed end is brought close to the fixed end. Then, both ends of the spiral tube 4 are fixed to a net member by soldering, and the spiral tube 24 is retained in the contracted state so that the spiral tube has a shorter pitch P<SB>2</SB>than the pitch P<SB>1</SB>in the natural state. After that, the spiral tube 24 retained in the contracted state is detached from the temporarily fixed rod-like member to be used for the manufacture of the flexible tube. COPYRIGHT: (C)2007,JPO&INPIT
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