PROBLEM TO BE SOLVED: To provide a medicament mixing mechanism for domestic animals capable of rapidly and reliably mixing a medicament into drinking water for domestic animals.SOLUTION: A medicament mixing mechanism comprises: a medicament introduction pipe line 13 for introducing a medicament from a medicament tank a medicament lead-out pipe line 14 for discharging the medicament introduced through the medicament introduction pipe line to a drinking water supply pipe a cylinder part 22 having a function for sucking the medicament from the medicament introduction pipe line and discharging the sucked medicament from the medicament lead-out pipe line an introduction side non-return valve 31 for accepting a flow of the medicament only in a direction introduced from the medicament introduction pipe line to the cylinder part and a lead-out side non-return valve 35 for accepting a flow of the medicament only in a direction led out from the cylinder part to the medicament lead-out pipe line. The introduction side non-return valve 31 is formed with a plate-like valve body 32 in contact with a valve seat on the side of the medicament introduction pipe line, and the lead-out side non-return valve 35 is formed with a plate-like valve body 36 in contact with a valve seat on the cylinder side provided in opposing to a lead-out port of the medicament lead-out pipe line. A volume between each non-return valve 31 or 35 and the cylinder part 20 can be made smaller, and a discharge pressure is stabilized.COPYRIGHT: (C)2015,JPO&INPIT【課題】 家畜用の飲水に対する薬剤の混入を迅速かつ確実に行うことができる家畜用薬剤混入機構を提供する。【解決手段】薬剤タンクからの薬剤を導入する薬剤導入管路13と、薬剤導入管路を経て導入した薬剤を飲水供給管へ吐出する薬剤導出管路14と、薬剤導入管路から薬剤を吸引し、その吸引した薬剤を薬剤導出管路から吐出する機能を有するシリンダ部22と、薬剤導入管路から前記シリンダ部へ導入する方向だけの前記薬剤の流れを許容する導入側逆止弁31と、シリンダ部から薬剤導出管路へ導出する方向だけの薬剤の流れを許容する導出側逆止弁35とを備える。導入側逆止弁31を薬剤導入管路側の弁座に当接する板状の弁体32で形成し、導出側逆止弁35を薬剤導出管路の導出口に対向して設けたシリンダ側の弁座に当接する板状の弁体36で形成する。各逆止弁31,35とシリンダ部20との間の容積を小さくでき吐出圧力を安定させる。【選択図】 図3
