| 摘要 |
PURPOSE:To permit the grading function of a grader according to the quality of soil by a method in which a plow and a claw having different grading functions are provided to the upper and lower faces of a blade, and the blade is rotatably attached to the triaxial direction of the arm of a back hoe. CONSTITUTION:A grader to be exchangeably attached to the bucket at the tip of the boom of an excavator, e.g., back hoe, etc., has a blade 28 with a long-sided plow 29 and a claw 30 having different grading functions. Both ends of the blade 28 are attached to both lower ends of a portal holder 23 in a freely turnable manner by an oil-pressure motor 32, and the portal holder 23 is attached to a fitting body 17 at its upper central part in a horizontally turnable manner. The fitting body 17 is also attached in a manner of turning around the horizontal axis in relation to the bracket. According to the working conditions, the functions of the soil-discharging blade can be switched. |
