| 摘要 |
PROBLEM TO BE SOLVED: To prevent wrong operation of a lock lever by forming a locking groove for retaining the rotated position of the lock lever in a guide hole in which the swivel fulcrum part of the lock lever slides according to the rotating operation. SOLUTION: In a guide hole 53 in which swivel fulcrum parts 31, 36, 37, 34 of a lock lever 23 slide according to the swivel operation of the lock lever 23, a locking groove 53a for retaining the swivel position of the lock lever 23 is formed on both the open end where a control valve and a hydraulic operation lever 21 are connected when the rotating fulcrum parts are located therein and the lock-side end where the control valve and the hydraulic operation lever 21 are cut when the rotating fulcrum parts are located therein. When clothes is caught on the hydraulic operation lever 21 to add the force of the direction of lowering rotating a lever stand 28 swung with the lock lever 23 to the hydraulic operation lever 21, the lever stand 28 and the lock lever 23 are rotated down. Accordingly, a working machine can be prevented from being wrongly operated.
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