Angle type check valve

An angle type check valve comprising:

• a valve box main body which is provided with an inflow port opened on a lower side, an outflow port opened on a lateral side, and an access hole opened on an upper side, and in which a valve chamber is formed that is bent and extends from the inlet port toward the outflow port;
• a lid body which is configured to be attachable to and detachable from the valve box main body so as to seal the access hole;
• a valve seat which is provided with a valve port at a central portion of the valve seat;
• a valve body which is configured to be capable of changing posture between opening posture for opening the valve port and closing posture for closing the valve port;
• and
• a hinge mechanism which supports the valve body such that the valve body can swing between the opening posture and the closing posture,
• wherein as a valve unit, the valve seat, the valve body, and the hinge mechanism are integrally assembled so as to be made into a unit part, and the valve unit is configured so as to be attachable to and detachable from a unit fitting portion provided in the valve box main body,
• wherein a pushing tool is provided which exerts pushing force in a direction of pressing a lower surface of the valve unit against the unit fitting portion in accordance with an operation of fitting the lid body in the access hole,
• wherein the hinge mechanism includes a hinge shaft and an urging member which urges the valve body toward the closing posture,
• the pushing tool includes a pillar body erected upward from an upper surface of the valve unit so as to avoid a swing locus of the valve body about the hinge shaft, and
• when the lid body is fitted in the access hole, an upper end portion of the pushing tool contacts the lower surface of the lid body and the pushing tool is pressed downward, so that a lower surface of the valve unit is pressed against the unit fitting portion.