PROBLEM TO BE SOLVED: To provide a water level adjusting device capable of adjusting the water level of a paddy field in a predetermined range which is operated only by a mechanical mechanism without requiring manpower and a power sauce and can be installed anywhere on the paddy field, which has a small number of components and is compact, and the projecting height of which from a ridge of the paddy field is low.SOLUTION: There is provided a water level adjusting device having such a structure that a third rotary shaft 7, which is supported by a horizontal shaft 3 provided near the upper end of a case 4 having a water intake port 17 and a water supply port 16 and is attached to a float 1 slidable in the horizontal and vertical directions, is connected to a second rotary shaft 9 which is attached to the reverse side of a first rotary shaft on a valve 10 rotatably attached to the first rotary shaft provided in the water intake port 17 using a connection member 8. Therefore, the water level adjusting device has such a mechanism that as the water level on the water supply port side lowers, the float 1 goes down, and the valve 10 opens to introduce water from the water intake port 17.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】人手や電源を必要とせず、機械的機構のみで作動し、水田の何処にでも設置が可能で、かつ、部品点数が少なく、コンパクトで、水田の畔から突出する高さが低い、水田の水位を一定範囲で調整可能な水位調整装置を提供する。【解決手段】取水口17と給水口16を備えた筐体4の上端付近に設けた水平シャフト3に支持され、水平方向と鉛直方向に摺動可能なフロート1に取り付けられた、第三の回動軸7と、取水口17に設けられた第一の回動軸に回動可能に取り付けられた弁10の第一の回動軸とは反対側に取り付けられた第二の回動軸9を連結部材8で連結する構成とすることで、給水口側の水位の低下に伴うフロート1の降下により、弁10が開き、取水口17から水を導入する機能を備えた水位調整装置を得る。【選択図】図1
