| 摘要 |
A flexible joint is used as a unit assembly of which a coupling pipe using a flexible pipe which is a corrugated pipe having ridges and valleys to provide a flexible advantage is installed with a coupler to be connected with other pipe without leaking. Since an outer diameter of the flexible pipe is determined by the ridge in the flexible pipe as compared with standard of the capacity of the pipe which is determined by an inner diameter of the valley, the volume of the flexible pipe is too large. Therefore, various couplers installed onto a circumference surface of the pipe have a further increased size as compared with the capacity of the pipe. Although a coupler of a reduced size is used on a circumference surface of a straight pipe with no corrugation to reduce the size, there is a problem of costs and pollution due to a process of spreading the corrugations, a cutting process, and noise and dust generated at the process. Accordingly, the present invention is to provide a coupling structure for a flexible joint which can effectively install a coupler by removing a cost burden and a pollutant generating process as compared with a conventional one, and simplifying a process of making a coupling surface, while improving a leaking prevention function. [Reference numerals] (AA) A-A' Before crimping; (BB) A-A' After crimping |
