The flap gate system of the present invention effectively blocks corners. (1) is a flap-type flap gate facility (1) configured so that a front end side of a door body can be rotated upright on a base end side as a point. Flap gates 11 and 12 respectively disposed on the other straight line regions S1 and S2 and corner flap gates 21 and 21 provided on a corner portion C where the two straight line regions S1 and S2 intersect with each other . The corner flap gate 21 is formed on a straight line passing through a portion of the corner portion C where an extension line in the width direction of the base end side bottom surface of the door body 13 of both the flap type flap gates 11, And has a plurality of door bodies 22 divided by a door. The door bodies 13 of the body flap gates 11 and 12 and the door body 22 adjacent to the door body 13 are arranged in the state of being indexed 31 by the retaining hinge structures 32, 31, respectively. (Effect) The flap gate for corners can be erected or covered following the rise or fall of the flap gate of the flip-flop so that the corner can be effectively blocked.
展开▼
