PROBLEM TO BE SOLVED: To provide a two-stage watering device slowly storing water of water current conduced from water sources such as river, pond, tap water and/or rainwater, and draining the water at a burst at each prescribed amount of the water, which includes a water storage/drainage device free from electric control.SOLUTION: The two-stage watering device is applied to two-stage water storage and drainage in an automatic watering device, and includes: a primary water-storage means which has a drainage port at its end part, retains a prescribed amount of water by directly pouring pump-up water or tap water conduced from the water source into a primary water-storage container and drains the water at a burst and a tank as a secondary water-storage means which receives the drained water from the primary water-storage means. The tank comprises a siphon tank through which the water is drained at a burst when the stored water reaches a prescribed amount, and the secondary water-storage means receives drained water from the primary water-storage means several times to use the drained water as initiation water, to achieve the automatic watering device using open loop without employing a complicated electrically-controlled device such as a water-level controller and a magnetic valve.COPYRIGHT: (C)2012,JPO&INPIT【課題】川、溜池、水道水、雨水等の水源から導いた水流をゆっくり貯水し、所定水量宛に貯水して一気に排水する装置であって、電力制御不要の貯水⇔排水装置を課題とする。【解決手段】応用分野としては、自動潅水装置の貯水、排水を2段構えで行う。端部に排水口を備え、胴体部が支軸された鹿威し形態の第1貯水容器に、水源から導いたポンプ揚水や水道水を直接注水し、所定水量溜めて一気に排水させる第1貯水手段と、第1貯水手段の排水を受ける第2貯水手段のタンクとを用意する。該タンクは、貯水が所定水量に達した際、タンクから一気に排水されるサイフォンタンクであって、第2貯水手段が前記第1貯水手段の複数回の排水を受ける態様により起爆水として用い、水位制御、電磁バルブ等の複雑な電気制御装置を用いることなく開ループによる自動潅水装置の実現を図る。【選択図】 図7
