PROBLEM TO BE SOLVED: To solve a problem that a high level technique of a worker is required for steering a weeder, a headland is required for turnaround, and a self-travelling weeder travels along a rice row and leaves a not-traveled area in a not-aligned planting having not-uniform interrow space directions.SOLUTION: A weeder floats and travels between rows/plants by a water proof case 1 and a floating body 2, stirs mud on a soil surface of a paddy field by an agitation wire 4 arranged on a wheel 3 to generate turbidity, blocks sunlight, and thereby suppresses germination and growth of weed. The wheel including a plate-shaped paddle allows the weeder to travel not only by floating but also by contacting ground, regardless of a water level. Right/left wheels are reversely rotated to perform an ultra-pivotal turn (on-the-spot turn), thereby a headland being not required. The weeder autonomously travels in the whole area of the paddy field in an inter-row/inter-plant space direction while not going along a rice row. Accordingly, the weeder can weed the paddy field by traveling in the whole area even in a not-aligned planting.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2016,JPO&INPIT【課題】防除草機の操縦には作業員の高度な技術が必要で、かつ、方向転換用に枕地を必要とする。また、自走式防除草機は、稲列に沿って走行するため、条間方向が一定しない不整列な植え付けでは、走行できない領域が残ってしまう問題がある。【解決手段】防水性のあるケース1と浮体2によって、条間・株間を浮上走行して、水田の土壌表層の泥を、車輪3に設置された撹拌ワイヤー4でかき混ぜることにより濁りを発生させ、太陽光を遮光して雑草の発芽及び生育を抑制する防除草機である。板状の水掻きを備えた車輪は、浮上走行だけでなく接地走行も可能なため、水位にかかわらず走行できる。また、左右の車輪を逆転させることで超信地旋回(その場旋回)出来るため、枕地を必要としない。また、稲列に沿わずに水田全域を条間方向・株間方向に自律走行するため、不整列な植え付けであっても全域を走行して、防除草できる。【選択図】図1
