To provide an opening and closing valve device contained in a pipe joint device and particularly the opening and closing valve structure of an internal passage opening and closing type pipe joint device capable of simply and precisely replacing an opening and closing valve member to a valve seat member.
In this internal passage opening and closing type pipe joint device, with the plug-in insert connecting operation of the male joint member 70 to the pipe joint body 10, the opening and closing valve member 41 is opened, and the male joint member 70 is anchored and constrained in the opening valve operation corresponding position by an anchoring engagement means, and with the releasing operation for the anchoring constraint, the opening and closing valve member 41 is returned to the valve closing position to enable plug-out separating operation of the male joint member 70. In the pipe joint device, a connecting sleeve 21 and a cylindrical base 11 are respectively provided with an internal passage A1, A2, and with a valve seat member 31 interposed in the interior, the connecting sleeve 21 and the cylindrical base 11 are threaded and connected to constitute the pipe joint body 10. The opening and closing valve member 41 is combined with the valve seat member 31 to constitute an opening and closing valve structure. In replacing the opening and closing valve member 41, the connecting sleeve 21 and the cylindrical base 11 are relatively disconnected to expose the opening and closing valve structure.
ISHII HIDESABURO
ISHII HIDETOSHI
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