| 摘要 |
PROBLEM TO BE SOLVED: To provide a locking device for an extended working implement which is provided with an inexpensive link arm member having no fear of buckling. SOLUTION: The locking device 70 is provided on a plowing working machine 1 in which an extension working machine bodies 30 are foldably provided at both sides of the working machine body 10 and locks the extended working implement 30 to the working machine body 10 when the extended working implement 30 is moved to a working position Ps extended from the working machine body 10. The device has a turning plate 53 turnably provided on a side end part of the working machine body 10, a turning cylinder 57 for turning this, an engagement pin 71 provided on the other side end part of the working machine body 10, a hook 73 turnably provided on a lower end part of the extended working implement 30 and provided with an engagement part 73a engaged with the engagement pin 71 at one end side and an arm part 73b at the other end side, and the link arm member 60 for connecting the turning plate 53 and the arm part 73b. This member 60 is elastically deformed when it is pushed by the arm part 73b. COPYRIGHT: (C)2010,JPO&INPIT |
