Hitachi Zosen Corporation

Yuuichirou Kimura

Toshiaki Morii

Kyouichi Nakayasu

Masaki Inui

Yoshito Yamakawa

Ryouta Yoshiki

A floating flap gate to prevent water from overflowing into underground spaces, with ease in raising or lowering the door body when water level changes. The floating flap gate comprises a door body with a forward end which swings upwards or downwards in a same direction following a rise or a drop in water level, wherein an opposite end serves as a fulcrum. A rod is attached to the forward end of the door body. One end of a wire rope is attached to the rod, and the other end is attached to a counterweight via fixed pulleys. The fixed pulleys are arranged so that the counterweight is at its lowest point when the angle of inclination of the door body with respect to a horizontal plane reaches within a range from 10&#xb0; to 80&#xb0; during raising or lowering of the door body.

Floating flap gate

The present invention utilizes a vertically upward force of a water when a tsunami smashes into a building to close openings that exist in an elevated location such as air supply and exhaust ducts, powerlessly and without a manual operation. The present invention serves as a disaster prevention panel which closes an openingdisposed in a wall of a building. A door bumperis disposed on an outer peripheral wall of the opening, and side door bumpersare disposed on both sides of the door bumper. A door body, which closes the openingand which has a specific gravity lower than a seawater, is attached between the side door bumperson both sides so as to freely swing upwards, with a lower portion of the door bumperserving as a fulcrum.

Flap gate-type waterproof panel for wall installation

The present invention provides a floating flap gap which has a door body with a forward end which is able to swing upwards, in a direction in which the water flows into an opening or at an access way, around a base end thereof serving as a fulcrum. The door body is attached to one end of a wire rope, and an auxiliary force generating means is attached to the other end thereof. This structure makes it possible to prevent an overflow during the initial influx of water and to enhance the ability of the door body to follow the water level when the door body begins to lower. This structure additionally makes it possible to mitigate a shock which occurs when raising of the door body is completed and when lowering of the door body is completed.

Growing community of inventors

Osaka, Japan

Yuuichirou Kimura