| 摘要 |
PROBLEM TO BE SOLVED: To make the joint holder detachable from the joint support in the coupling device for working machine that is equipped with a linking frame for linking the working machine on the rear end side of the three-point link mechanism set at the back part of the tractor, the joint holder for holding the joint part on the working machine side of the joint shaft that interlocks and links with the PTO shaft and the PIC shaft is arranged between a couple of the right and left joint supports set to the linking frame, the shanks provided on both right and left sides of the joint holder are fitted to the guide groove formed on the joint support, and the stopper that receives the positioning member provided on the joint holder so as to retain the posture of the joint holder is provided on the joint support. SOLUTION: In this linkage device, the notch 19 is incised so that the shank 65 may uncouple from the guide groove 68 and the recess 17 for allowing the shank 65 to move is provided in order to allow the positioning member 66 to move to the position at which it does not hinder the movement of the shank 65, when the shank 65 is allowed to uncouple from the guide groove 68 via the notch.
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