| 摘要 |
<p>PROBLEM TO BE SOLVED: To contrive the simplification of piping work as well as the improvement of finishing property after the work by a method wherein a pipe-shape sleeve, inscribed with a wall penetrating hole, is provided with a male screw thread on the outer periphery of the same while a wedge-shape projected part is provided on the dish type flange of a bushing, provided with a part having no female screw thread, on one part of the length of the bushing, which is inserted into the sleeve. SOLUTION: A pipe-shape sleeve, inscribed with a wall penetrating hole 3 for passing a piping pipe 2 or the like, connected to an indoor unit 1, from indoor side to outdoor side to protect and insulate the pipe 2, is provided with a male screw thread on the outer periphery of the same. Further, the flange of the sleeve 4, which is contacted with an indoor wall surface 7, is formed integrally. On the other hand, a bushing 6, inscribed with the sleeve 4 from the outdoor wall surface 5 side, is provided. The bushing 6 is provided with a female screw thread part, having a part having no female screw thread in the degree of about 1/3 of the inserting length from the sleeve 4 side, while the dish type flange is provided with a wedge-shape projected part, for preventing the reverse rotation of the bushing, on the surface of the same. According to this method, insertion is facilitated and clamping work can be improved.</p> |
