| 摘要 |
<p>PURPOSE: To make it easier to disperse and adjust stress in an unwinding pipe for a sprinkler by making the corrugation pitch of at least one end of a flexible metal pipe smaller than that of the other part. CONSTITUTION: An unwinding pipe 1 is composed of a stainless steel flexible pipe 11, and joints 2, 3 at both ends. Small pitch parts 12, 13 which are corrugated at a smaller pitch than the corrugation pitch of the center 14 are formed at both ends of the flexible pipe 11. A straight pipe part 15 and a flare part 16 are formed ahead of the small pitch parts 12, 13. The straight pipe part 15 is used as a band to fix an incombustible plate material to be fitted to the outer face of the unwinding pipe 1. Joints 2, 3 are composed of joint bodies 21, 31 which have a sealing face to metal touch seal the flare part 16 and cap nuts 22, 32, and the flare part 16 is sealed, nipped and connected therewith.</p> |
