| 摘要 |
The diameter of a front end opening section (20-1) extending rearward over a predetermined length from the front end opening of the male member reception hole (20) is set to be larger than that of a male member reception section (20-2) of the male member reception hole that follows the front end opening section. The backup ring (18) is allowed to engage the inner wall surface (20-3) of the front end opening section (20-1) as the backup ring (18) is pressed radially outward from the annular groove (24) by the seal ring (16) deformed by engagement with the inner wall surface of the male member reception hole (20) when the male coupling member (12) has begun to be inserted into the male member reception hole (20), thereby preventing the backup ring (18) from coming out radially outward from the annular groove (24).
|
