| 摘要 |
Provided is a coupling fitting in which a locking surface of a locking hook is set in a range in which the angle thereof does not become negative so that, at a stage in which the coupling state of the coupling fitting is maintained even if something causes high pressure to be applied to the coupling fitting, a hose, or the like during use, a seal section of the coupling fitting opens and leaks or the coupling state of the coupling fitting is maintained until an attached hose or the like breaks. |
