PROBLEM TO BE SOLVED: To provide a drum screen that enables smoother rotation of a rotating drum, easier reduction of frictional force between an opening inner peripheral surface of the rotating drum and a reinforcing fabric coming into contact with the opening inner peripheral surface, easier reduction of noise generated during rotation, large improvement water sealing efficiency of a water sealing portion, drastic improvement of durability of the water sealing portion and further improvement of the durability of the water sealing portion by alternately laminating the reinforcing fabric and an elastic sheet.SOLUTION: A drum screen includes: a rotating drum installed within a frame and having an opening that is formed on the other side and inside of which sewage water flows in with one end closed a center shaft rotatably supporting the rotating drum a sludge receiver located within the rotating drum and an injecting portion for injecting filtered water to the rotating drum. The drum screen further includes a water sealing portion that has a reinforcing fabric installed on a frame inner peripheral surface facing the opening of the rotating drum to come into contact with the inner peripheral surface of the opening of the rotating drum and an elastic sheet arranged on the upper side of the reinforcing fabric and that prevents the sewage water flowing into the rotating drum and the filtered water within the frame from mixing with each other.COPYRIGHT: (C)2015,JPO&INPIT【課題】回転ドラムをより円滑に回転させ、回転ドラムの開口内周面と、前記開口内周面に接する補強織物との摩擦力をより容易に低減させ、回転中に発生する騷音もより容易に低減させ、水密部の水密効率がより大きく向上し、水密部の耐久性を大幅に向上させ、補強織物と前記弾性シートの交互な積層によって水密部の耐久性がより大きく向上したドラムスクリーンを提供する。【解決手段】フレーム内に備えられ一側が閉鎖した状態で他側に汚水が内部に流入する開口が形成された回転ドラムと;回転ドラムを回転可能に支持する中心軸と;回転ドラム内のスラッジ受けと;回転ドラムに濾過水を噴射する噴射部とを含み、回転ドラムの開口と向き合うフレーム内周面に備えられて回転ドラムの開口の内周面と接する補強織物と、その上部に備えられる弾性シートとを含み、回転ドラム内に流入した汚水とフレーム内部の濾過水が混じるのを防止する水密部を備える。【選択図】図1
