To provide a land grading working machine having a land grading plate, etc., supported on a shaft in the direction crossing with a shaft in vertical direction on a supporting frame, capable of readily controlling reverse rotation and soil removing angle, improved in labor saving and workability and useful for ridging and removal of snow, etc.
This land grading working machine is equipped with a main frame connected to a traveling vehicle such as tractor, a supporting frame 5 rotatably formed round the shaft 21 in vertical direction in the main frame 4 and a land-grading plate 9 supported on the shaft 6 in the direction crossing with a shaft 21 in the vertical direction. Furthermore, the land grading working machine is preferably equipped with a fixing means for fixing the rotation to the supporting frame 5 of the land-grading plate 9 and a lock releasing mechanism for releasing the fixing means and further, a stretching and contracting means 59 for rotating the supporting frame 5 is preferably fitted.
YANAGISAWA HISATOSHI
WASHIMI YASU
