PROBLEM TO BE SOLVED: To provide a bird damage prevention device which can be easily attached to an electric wire without performing opening/closing operation of a cover plate at the time of working at a high place and can simplify installation work on the electric wire. SOLUTION: This bird damage prevention device is configured to hold a filamentous body in a separated state above an electric wire installed between electric poles. A frame body 1 made of a substantially C-shaped frame that is fixedly supported by an electric wire, a lid plate 4 capable of closing the opening of the frame body 1, and a linear body assembly that stands up and protrudes upward from an upper wall 2 of the frame body 1. An electric wire fixing mechanism C composed of a joint portion 3 and a push plate 7 that is attached to the tip of a screw body 6 threadedly penetrating the bottom wall 5 of the frame body 1 and moves up and down inside the frame body 1. Have An arm portion 9 extending toward the inner part of the frame body 1 is projectingly provided at an upper end of a cover plate 4 swingably pivoted on the upper end portion of the frame body 1, and a pivot portion 10 formed on the frame body 1 is provided. A locking projection 11 is formed on the outer peripheral surface of the locking plate 11 for contacting the upper end surface of the cover plate 4. [Selection diagram] Fig. 3【課題】高所での作業時に蓋板の開閉操作を行うことなく容易に電線に装着でき、電線への設置作業を簡略化できる鳥害防止器具を提供する。【解決手段】電柱間に架設された電線の上側に線条体を離隔した状態で保持するようにした鳥害防止器具である。電線に固定支持する略Ｃ型枠からなる枠本体１と、この枠本体１の開口部を閉止可能な蓋板４と、枠本体１の上壁２から上方に起立突出させた線条体係合部３と、枠本体１の底壁５を螺合貫通しているねじ体６の先端に装着され、枠本体１の内部を昇降移動する押し板７とで構成した電線固定機構Ｃとを有している。枠本体１の上端部に揺動可能に枢支した蓋板４の上部側端に枠本体１の奥部に向かって延びるアーム部９を突設するとともに、枠本体１に形成した枢支部１０の外周面に蓋板４の上端面と当接する係止突部１１が形成してある。【選択図】図３
