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    • 6. 发明专利
    • WATER LEVEL ADJUSTER FOR IRRIGATING WATER
    • JPH10201382A
    • 1998-08-04
    • JP1223097
    • 1997-01-27
    • PADEI KENKYUSHO KKMITSUBISHI PLASTICS INDSEKISUI CHEMICAL CO LTD
    • ONODERA TSUNEOHASHIMOTO TAISUKESHIBAHARA NARIYOSHI
    • A01G25/00E02B13/02
    • PROBLEM TO BE SOLVED: To obtain the adjuster which is easily installed with simple constitution by providing an outer cylinder arranged on the base surface of a planting surface in a rice field, an inner cylinder which is arranged inside the upper end part of the outer cylinder and positioned in a part upper than the upper end surface of the outer cylinder and a water supply tube which is arranged inside the outer and inner cylinders and whose upper end surface is positioned in a part upper than the upper end surface of the inner cylinder. SOLUTION: This water level adjuster 10 is, for example, provided with a cylindrical outer cylinder 11 and the inner cylinder 12 is fitted to the upper end part of the outer cylinder 11 in a concentric state so as to be supported in a water stop state in a vertical direction slidably. The water supply tube 13 is inserted to the outer cylinder 11 in the concentric state and the upper end surface of the water supply tube 13 is positioned in the part upper than the upper end surface of the inner cylinder 12. A flared injecting tube part 15 is provided in the upper end part of the water supply tube 13 and its lower end part is fitted with a seal member 16. The water level adjuster 10 is arranged on the base surface 31 being the planting surface of the rice field 30, a water supply side watering tube 21 is provided in the flow-in part 13a of the water supply tube 13 and a drain-side watering tube 22 is provided in the flow-out part 11a of the outer cylinder 11.
    • 7. 发明专利
    • IRRIGATION MANAGEMENT SYSTEM FOR PADDY FIELD
    • JPH10127186A
    • 1998-05-19
    • JP29147796
    • 1996-11-01
    • PADEI KENKYUSHO KKSEKISUI CHEMICAL CO LTDMITSUBISHI PLASTICS IND
    • ONODERA TSUNEOSHIBAHARA NARIYOSHIHASHIMOTO TAISUKE
    • A01G25/00
    • PROBLEM TO BE SOLVED: To supply irrigation over the entire paddy field, to automatically maintain a field surface water level fixed, to improve executability and to lower a cost. SOLUTION: An automatic water level setting device 6 is provided with the four chambers of a lower water supply chamber connected to a water supply pipe, an adjustment water flow-in chamber connected to an upstream side water level adjustment pipe, an adjustment water flow-out chamber 86 connected to a downstream side water level adjustment pipe and a water discharge chamber 87 connected to a water discharge pipe and communicated to the adjustment water flow-in chamber 86 through a flow path opening/closing means 66 for mud discharge on the lower part of a water supply and discharge measure 7. Then, it is provided with the three chambers of a water level adjustment chamber 81 communicated to the adjustment water flow-in chamber 86 and communicated to the adjustment water flow-out chamber 86 through a water level adjustment means 67, an upper water supply chamber communicated to the lower water supply chamber and a water supply/discharge chamber 83 provided with a water supply/discharge port 83b to a cultivation section, communicated to the water level adjustment chamber 81 and the upper water supply chamber respectively through the flow path opening/closing means 64 for adjustment water and an overflow weir for water supply and communicated to the water discharge chamber 87 through the flow path opening/closing means for water discharge on the upper part.
    • 10. 发明专利
    • LEVEE AND ITS FORMING METHOD
    • JPH11286926A
    • 1999-10-19
    • JP8873098
    • 1998-04-01
    • MITSUBISHI PLASTICS INDSEKISUI CHEMICAL CO LTDPADEI KENKYUSHO KKSASAKI CO
    • SAOTOME YUTAKATAKAO KIMITOKUONODERA TSUNEO
    • E02B13/00
    • PROBLEM TO BE SOLVED: To improve the function by covering the ground part of a plastic sheet having one lateral side part buried in the ground with earth and sand, and covering the surface with a plastic cover. SOLUTION: In construction of a levee 1, one lateral side part of a strip plastic sheet 2 is inserted to an insert groove longitudinally provided in a levee setting part followed by back filling and fixed by rolling compaction. A form is thin arranged on both sides of the ground protruding part of the sheet 2, and earth and sand, or earth and sand including cement or a soil hardener is filled in the inner part to form a levee body part 3. After cover insert grooves are formed on both the foot parts of the body part 3, the form is removed, the body part 3 is covered with a plastic cover 4, and both the edges 4a thereof are inserted to the cover insert grooves followed by back filling and rolling compaction to fix the cover 4. According to this, since penetration of water for irrigation and boring by small animals can be surely prevented, and the strength is ensured by the levee body part, the plastic cover can be thinned to significantly reduce the cost, and the construction can be also facilitated.