| 摘要 |
PROBLEM TO BE SOLVED: To make a structure by which the rubbish is not accumulated and seal effectively by installing a soft seal cylinder stuck to the expansion part in the circumferential direction formed on the outer periphery of a female lure adapter in the outer cylinder insertion part of a male lure adapter. SOLUTION: When the joined part 43 of a male lure adapter 4 with a new thorn plug 6 is inserted in a female lure adapter 3, the tip part 48a of a soft, elastic seal cylinder 48 is hit to the slant surface of an expansion part 34 and approaches to a top flat part while spreading out and advancing. Further, when the male lure adapter 4 is rotated while advancing, the female screw 45 is screwed with a spiral projection 34. At the same time, the female lure adapter 3 and the insertion part 5 of the male lure adapter 4 are locked by inserting a taper cylinder into a taper hole 36. At this time, the tip part 48a of the seal cylinder 48 is stuck to the outer periphery of the top flat surface of the expansion part 34 and its inside is sealed. As the contact of the soft tip 48a with the expansion part 34 is carried out near the flat surface like above, a certain seal function can be always maintained. |
