| 摘要 |
PROBLEM TO BE SOLVED: To provide a tillage depth adjustment device which can further improve operability of operation means and can improve a degree of layout.SOLUTION: A tillage depth adjustment device 1 arranged in the vicinity of a driver's seat of a tractor and including an operation dial 2 capable of adjusting a tillage depth of a rotation jaw attached at a rear part of the tractor and tilling a plow land includes: a casing B holding the operation dial 2 so as to be operated; a restriction plate material 3 capable of restricting optionally an operation range of the operation dial 2 by interfering with the operation dial 2 and adjusting optionally an upper limit height or a lower limit height to which the rotation jaw can be moved; and fixing means 4 capable of moving the restriction plate material 3 by being gripped by an operator and fixing the restriction plate material 3 at an optional position.SELECTED DRAWING: Figure 6 |
