| 摘要 |
<P>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. <P>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. <P>COPYRIGHT: (C)2012,JPO&INPIT |
