PROBLEM TO BE SOLVED: To provide a water level-adjusting basin for a paddy field which enables precise setting by millimeter units to facilitate adjustment of the water level of a paddy field to reduce burden for deep water management, and which has a simple structure to be free from the problem of malfunction and/or poor actuation.SOLUTION: A basin body 1 is constituted of a bottom plate 2, a pair of side-wall plates 3, 3, and a back-wall plate 4 provided with a water flow hole 4A and has an almost U-shaped support groove 5 at its inner surface. A pressure-receiving plate 6 is inserted and set in the almost lower half part of the support groove 5 while setting a projecting part 6C at its lower end as a fulcrum with its upper end side inclined and movable in back and forth directions. A water level-adjusting plate 7 is inserted and set in the almost upper half part of the supporting groove 5 so as to move up and down while making the lower end side 7C face the upper end side of the pressure-receiving plate 6. The water level-adjusting plate 7 is kept at a desired water level adjustment height because the pressure-receiving plate 6 inclines backward based on the projecting part 6C as a fulcrum and a chamfered part 6F comes close under pressure, and is flexibly liftable because the pressure-receiving plate 6 rises based on the projecting part 6C as a fulcrum when its upper end side is pushed and moved forward.COPYRIGHT: (C)2012,JPO&INPIT【課題】水田の水位調整を容易に、ミリ単位の正確な設定を行うことができるので深水管理の負担が小さいし、構造が単純であるから故障や作動不良の問題も無い水田用水位調整桝を提供する。【解決手段】桝本体1は、底板2と、一対の側壁板3、3と、通水穴4Aを設けた後壁板4とから構成してあり、内面に略凵字状の支持溝5が設けてある。支持溝5の略下半分に、受圧板6が下端の突起部6Cを支点に上端側を前後方向に傾動可能に挿装してある。受圧板6の上端側に下端7C側を対面させて支持溝5の略上半分に水位調整板7が昇降可能に挿装してある。水位調整板7は、受圧板6が水圧により突起部6Cを支点に後方に傾斜して面取り部6Fが圧接することにより所望の水位調整高さに保持され、上端側を前方に押動すると突起部6Cを支点に受圧板6が起立することで、昇降自在になっている。【選択図】図3
