Patent ID: 7073776

Claim:
A sluicing valve device comprising: case members configured to be attachable to a pipe; and a valve element which is arranged inside of the case members and is adapted to be inserted into a hole formed in the pipe, wherein the valve element comprises: a valve element core metal fitting, an elastic seal member covering and being supported by the valve element core metal fitting, and a lifting and lowering shaft having a rod shape for moving the valve element core metal fitting along an insertion direction to said hole, to press and deform elastically the elastic seal member in the insertion direction, said valve element core metal fitting comprising at its tip end in the insertion direction: (i) a tapered side surface extended downward, and (ii) a guide portion extended downward further than the tapered side surface, said guide portion having a width greater than a maximum outer width of the tapered side surface in a direction perpendicular to the axial center direction of the pipe for preventing the elastic seal member from protruding in an axial center direction of the pipe.