| 摘要 |
PROBLEM TO BE SOLVED: To ensure an excellent hermetic sealability, and at the same time, provide a steadfast fitting property as a cap body by providing an internal plug section being fitted in the pipe of the tip end of an injection pipe on the cap body which is fitted on the injection pipe of an injector in a manner to cover the injection pipe, in the injector which injects a medical treating chemical for a mastitis or the like of milking cows. SOLUTION: A cap body 1 has an injection pipe cap section 2 which covers the injection pipe 11 of an injector 10, and a base part cap section 3 which is fitted on the neck step section 12 of the base section of the injection pipe of the injector 10, and in this case, an internal plug section 21 which is fitted in the pipe at the tip end section 13 of the injection pipe 11 is provided on the cap body 1. Also, on a tip end cap piece section 4 of the injection pipe cap section 2, a double plug section 20 which is fitted both in the pipe of the tip end section 13 of the injection pipe 11 and on the pipe outer periphery as well, is provided. By this constitution, when the cap body 1 is fitted in the injection pipe 11 of the injector 10, the internal plug section 21 applies a pressing force in the direction to expand the inside of the pipe, and a hermetric sealability which is excellent in airtightness and liquid-tightness can be ensured, and also, a steadfast fitting property as the cap body 1 can be obtained. |
