| 摘要 |
PROBLEM TO BE SOLVED: To provide a piping connection method which hardly lets the piping separate of a water supplying and draining facilities. SOLUTION: In this method, an outer pipe 4 and inner pipe 5 are connected by using the cylindrical attachment 1 for press consisting of press members 2, 3. In the press members 2, 3, press grooves 2a, 2b, 3a, 3b are formed so that a regular hexagonal recessed groove is formed along the periphery direction at two places of the inner periphery at these combination time and near the end of the outer pipe 4, projections 4a, 4b are formed along the periphery direction and O rings 6, 7 are fitted inside the projections 4a, 4b and then, the end of inner pipe 5 is inserted inside the outer pipe 4 and the periphery of the outer pipe 4 is covered by the press members 2, 3 in such state that the projections 4a, 4b are matched with four press grooves and the piping of the water supply/ discharge facility pressed by the outside pressure is connected under this state. At the looking time from the straight line direction passing the center of circle forming the inner periphery, in two regular hexagonal recessed grooves, the position of the top of oneside regular hexagonal recessed groove is shifted by 30 deg. for the top of another regular hexaginal recessed groove.
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