PROBLEM TO BE SOLVED: To provide a tilling operation machine which is freed from any erroneous damage of an extending auxiliary leveling plate while suppressing any rise of costs.SOLUTION: A tilling operation machine 1 comprises: an operation machine body 2 supporting a tilling rotor rotatably a pair of right operation machine 20 R and left operation machine 20 L connected vertically turnably to two widthwise ends of the machine body 2 and capable of extending tilling operations by the operation machine body 2 and a right extension-aiding ground-making plate 30 R and a left extension-aiding ground-making plate 30 L disposed vertically turnably at individual widthwise-outer end portions of those right operation machine 20R and left operation machine 20 L. The right and left operation machines 20 R and 20 L can turn in accordance with extensions and contractions of a rotation cylinder 41 interposed between the machines 20 R and 20 L and the operation machine body 2, and the right extension-aiding ground-making plate 30 R and the left extension-aiding ground-making plate 30 L turn when they receive powers accompanying the extension and contraction of the rotation cylinder 41.COPYRIGHT: (C)2014,JPO&INPIT【課題】コストの増大を抑制し、延長補助整地板が誤って損傷する虞のない耕耘作業機を提供する。【解決手段】代かき作業機1は、耕耘ロータを回転可能に支持する作業機本体2と、この幅方向両端部に上下方向に回動自在に接続されて作業機本体2による耕耘作業を延長可能な一対の作業体右20R、作業体左20Lと、これらの作業体右20R、作業体左20Lの各幅方向外側端部に上下方向に回動自在に設けられた延長補助整地板右30R、延長補助整地板左30Lとを備える。作業体右20R,作業体左20Lは、作業機本体2との間に設けられた回動シリンダ41の伸縮に伴って回動自在であり、延長補助整地板右30R、延長補助整地板左30Lは回動シリンダ41の伸縮にともなう動力を受けて回動する。【選択図】 図1
