| CPC F16L 37/252 (2013.01) | 6 Claims |
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1. A pipe joint assembly comprising:
a male pipe joint including:
a cylindrical male joint body defining a male flow path; and
an engaging projection projecting radially outward from the male joint body; and
a female pipe joint configured to be detachably coupled to the male pipe joint, the female pipe joint including:
a cylindrical female joint body defining a female flow path;
a cylindrical rotary coupling member circumferentially rotatably disposed around an outer peripheral surface of the female joint body and configured to at least partially receive the male joint body, wherein the rotary coupling member has a guide portion extending so as to project circumferentially at a forward end portion of the rotary coupling member, wherein the guide portion has an engaging surface facing toward a rear end portion of the rotary coupling member;
a movable locking member disposed to the rotary coupling member so as to be displaceable between a lock position and an unlock position, the movable locking member pivotable between the unlock position and the lock position outside the rotary coupling member such that, in the unlock position, the movable locking member extends radially outward from an outer peripheral surface of the rotary coupling member to function as a handle for a user to grip to rotate the rotary coupling member, and in the lock position, the movable locking member extends along the outer peripheral surface of the rotary coupling member; and
a retaining member disposed on the outer peripheral surface of the rotary coupling member to pivotably retain the movable locking member, and a sleeve disposed so as to be displaceable along the movable locking member, the sleeve displaceable between a pivot-permitting position where the sleeve is out of engagement with the retaining member in a pivoting direction of the movable locking member, and a pivot-inhibiting position where the sleeve is in engagement with the retaining member in the pivoting direction to inhibit pivoting of the movable locking member,
wherein the pipe joint assembly is configured such that, with the movable locking member placed in the unlock position, when the male joint body is inserted into the rotary coupling member to a predetermined position and then the rotary coupling member is rotated in a first rotational direction to a predetermined coupling position, the engaging projection engages the engaging surface so that the male joint body and the female joint body are sealingly engaged with each other to achieve a coupled state, and
wherein the pipe joint assembly is further configured such that, with the movable locking member displaced to the lock position in the coupled state, when the rotary coupling member is rotated in a second rotational direction opposite to the first rotational direction toward an uncoupling position where the engaging surface and the engaging projection are out of engagement with each other, the movable locking member engages the engaging projection to inhibit the rotary coupling member from rotating to the uncoupling position.
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