| 摘要 |
The present invention relates to a safety apparatus of a harrow for a tractor to prevent an outer harrow plate from being randomly opened in a harrow for a tractor comprising: a central harrow plate being elevated by a lifting cylinder; and a pair of outer harrow plates coupled to both ends of the central harrow plate and capable of rotating by a connection arm. More specifically, the both ends of the central harrow plate comprises: a plate having a safety apparatus arranged on the central harrow plate; a locking plate having a hook arranged on the plate having a safety apparatus and capable of rotating; a locking and tightening plate protruding from the connection arm in which the hook arranged on the locking plate can be hung; and a hydraulic cylinder pushing the locking plate to be upwardly rotated. When a worker wants to descend the central harrow plate for working, the hook arranged on the locking plate loosened from the locking and tightening plate because the locking plate being pushed and upwardly rotated by the hydraulic cylinder. |
