| 摘要 |
PROBLEM TO BE SOLVED: To reliably determine a screwing amount of a fastening member necessary to proper sealing of a pipe connection spot and prevention of pull-out of a pipe and to reliably prevent the occurrence of co-rotation of a fastening regulation tool with the fastening member, in the fastening regulation tool of the fastening member to fasten a pipe inserted in the insertion port part of the coupling. SOLUTION: A protrusion 26 is formed on a ring part 21 fitted in a receptacle part 110. A first contact part 22 is formed on one end side in an axial direction of the ring part 21. A second contact part 23 is formed on the other end side in an axial direction of the ring part 21. A distance (a) between the first and second contact parts 21 and 23 is equalized to a distance between a reference surface 130, available when the fastening member 120 provides a sealing ability and a function to prevent the occurrence of pull-out, and an opposite part 121. Recessed places 27 and 28 are formed on both sides of the protrusion 26, and a protrusion part 113 fitted in the recessed places 27 and 28 is formed on the coupling side. |
