| 摘要 |
PROBLEM TO BE SOLVED: To provide down pipe fitting structure capable of restraining an elastic deformation volume of a down pipe support implement and optimally cooling a cylindrical body and a mounting rib when manufacturing a down pipe.SOLUTION: Down pipe fitting structure A comprises: a mounting rib 2 protruded outward from a peripheral surface 1a of a cylindrical body 1b of a down pipe 1 and extended along the cylindrical body 1b in an axial direction O1 thereof; and a down pipe support device 3 which has a fitting groove 10 enabling the mounting rib 2 to be fitted thereto, is installed on an outer wall T by being fixed thereto as well as fixedly supports the down pipe 1 by fitting the mounting rib 2 to the fitting groove 10. The mounting rib 2 is formed in a hollow state. |
