| 摘要 |
<p>PROBLEM TO BE SOLVED: To prevent a fixing pin from comming off from an insertion passage when the fixing pin is inserted into the insertion passage of a port part to attach a joint. SOLUTION: An attaching recess 22 attached with a quick disconnect coupling 21, and an insertion passage 24 arranged in the vicinity of the recess 22 are provided in a port part 2. A fixing pin 31 inserted into the insertion passage 24 has elastic force and are curved in view of a longitudinal direction in a natural condition. Deforming force by the fixing pin itself and frictional force with respect to an inner face of the insertion passage 24 are applied to the fixing pin 31 depending on a shape of the pin 31 or the like in the midway where the pin 31 is extracted or inserted from the passage 24. Relatively large force for opposing against the deforming force and the frictional force is required thereby to extract the fixing pin 31 from the insertion passage 24, and careless comming-off is prevented thereby.</p> |
