| 摘要 |
<p>A harrowing device for harrowing a ground surface includes a haulable frame (1). A plurality of blade holders (2) are secured to the frame (1), and extend downward from the frame (1). The blade holder (2) has a cavity, a pair of holes (8), a pair of inclined interior face in the cavity. The inclined interior faces are arranged so as to become close to each other the further away from the holes (8). A plurality of blades (3) are fitted to the blade holder (2), each blade (3) having a shank (3a) inserted into the cavity and a blade portion (3b) for harrowing the ground. The shank (3a) has a pair of holes (9) corresponding to the holes (8) of the blade holder (2), and a protrusion for contacting the inclined interior faces. A pin (10) is inserted into the holes (8,9) of the blade holder (2) and the shank (3a) to pivotably support the blade (3). <IMAGE></p> |
