| 摘要 |
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. |
