PROBLEM TO BE SOLVED: To provide a prevention tool for nesting intrusion, a tool that can prevent swallows from nesting in a beauty lending vestibule, a porch, eaves, etc., and prevent bats from nesting by hanging from a subtle ceiling gap in a wall corner while the residents suffers from droppings from these birds and animals.SOLUTION: The prevention tool is characterized in that a plurality of through holes (12) are prepared in different poles in he upper edge end of the wall, with a wire inserted in the through holes (12), that when a tensile force is generated by tightly binding the wire with a coil spring, the wire (26) is restored by a pulling force of the coil spring (25) even with a weight added to the center of the wire (26), and that the wire (26) is thereby installed in an extendible manner in a parallel state, with no intrusion for nesting allowed.COPYRIGHT: (C)2014,JPO&INPIT【課題】美観を生かす玄関とベランダ及び軒下等に巣を造る燕、そして壁隅の天井の微妙な隙間から垂下しねぐらとするコウモリ達のフンに悩まされてきた。これらを排除できる営巣侵入防止具を提供する。【解決手段】壁の上部縁端部に異なる支柱に複数の貫通孔(12)を具備し、該貫通孔(12)に線材挿通し、コイルバネと緊結させて張力を生じさせると、線材(26)の中心部に加重が加わってもコイルバネ(25)の引力によって線材(26)を基に戻し、並行状態で張設可能に線材(26)が設けられ営巣の侵入を受け付けないことを特徴とする。【選択図】 図1
