| 摘要 |
PURPOSE:To reduce a labor and a time which are spent to obtain washed rocks, by a method wherein, after rocks are dug up by a bucket, water mixed with sand is immediately injected against the surface of the rock. CONSTITUTION:When rock in a ground is dug up, rock S is dug up by the use of a bucket 11 in a condition to attach no claw 22 to an arm 11, the rock S is raised to a ground surface. The claw 22 is then attached to the arm 11, water pumps 21A and 21B are driven, water mixed with sand is injected against the surface of the rock S to wash off soil adhered to the surface of the rock S for removal. The motion is made on the whole surface of the rock S by grasping the S by means of the bucket 11 and the claw 22 for rotation. This, after the rock S is excavated, enables immediate washing of the rock, resulting in the possibility to reduce a labor and a time which are spent to obtain the washed rocks. |
