| 摘要 |
PROBLEM TO BE SOLVED: To enable to simply attach the link pin of an upper bracket on the side of a working implement to one end of a top link adjusted to a suitable length.SOLUTION: Stopper plates installed with upper side engaging hook parts are integrally fixed to the other side of a link frame in which an axially attaching pin hole of the upper bracket of one side of a tractor is formed, a long hole in the axial direction and a fulcrum pin hole are pierced through the overlapped link frame and the stopper plates, and a turnable fulcrum shaft installed to turnable fulcrum pin holes of lock brackets is turnably attached to the fulcrum pin hole. The lock brackets have press engaging parts for forming a pin hole by turnably moving to the tip of the long hole in front, as well as have an engaging pin in inclined long holes engaging with the upper side hook engaging parts of the stopper plates when turning upward, moreover, a tension spring for forcing the press engaging parts of the lock brackets toward the tip side of the long hole is installed between the spring engaging rod of the lock brackets and the link frame. |
