| 摘要 |
A safety apparatus of a foldable harrow is provided to prevent damage of the harrow since an outside harrow is folded in a rear direction of a moving direction of the tractor by the obstacles or overload even in case that the tractor drives back. A safety apparatus of a foldable harrow includes: a center harrow plate(41); a pair of outside harrow plates(42) connected to the center harrow plate by a connection arm(50); a first hinge part(51) formed on the end of the center harrow plate side of the connection arm so that the outside harrow plate pivots in a tractor direction; a second hinge part(60) formed on the end of the outside harrow plate side of the connection arm so that the outside harrow plate pivots in back and forth directions of the tractor; and a safety bolt(52) installed on a safety plate(53) fixed to one side of the connection arm and cut when overload is applied to the outside harrow plate. |
