PROBLEM TO BE SOLVED: To prevent the infestation of various infectious diseases such as an avian influenza virus etc. and to improve a rearing environment in a livestock barn.SOLUTION: A system for preventing the intrusion of small animals includes: an invasion prevention net 10 that has electroconductivity and is provided to block an entry pathway of small animals in the livestock barn 100 where industrial animals are reared and a high voltage apparatus 20 that is connected via a wire with the invasion prevention net 10, converts a primary voltage from an external power source 30 into a control voltage for electric shock to give the small animals the electric shock and a control voltage for generating minus ions to supply the minus ions in the livestock barn 100, respectively, and applies each control voltage to the net 10 as a secondary voltage.COPYRIGHT: (C)2013,JPO&INPIT【課題】鳥インフルエンザウィルス等の各種感染症の蔓延防止と、畜舎内の飼育環境の向上を目指すこと。【解決手段】導電性を有し、産業動物を飼育する畜舎100内における小動物の侵入経路を塞ぐように設けられる侵入防止ネット10と、侵入防止ネット10と配線接続され、外部電源30からの一次電圧を、小動物に対して電撃を与えるための電撃用制御電圧と、畜舎100内へマイナスイオンを供給するためのマイナスイオン発生用制御電圧とにそれぞれ変換し、二次電圧として当該ネット10に各制御電圧を印加する高電圧装置20とを備えた。【選択図】図1
