| 摘要 |
PROBLEM TO BE SOLVED: To solve a problem that the cost of horizontal excavation is high in a conventional grab bucket. SOLUTION: In the grab bucket for dredging, the grab bucket is suspended by a supporting wire via an upper part supporting member and both right and left arms connected to the upper part supporting member freely swingably at their one ends and connected to the lower ends of buckets freely swingably at their other ends, and moreover, a connecting shaft freely turnably connecting the respective upper parts of the pair of buckets is raised and lowered in a vertical direction by an opening/closing wire in order to open/close the pair of right and left opposed buckets constituting the grab bucket. In the grab bucket 1, the connecting positions of the one ends of both the right and left arms in a right and left direction are respectively positioned on a straight line passing the connecting shaft of the pair of opposed right and left buckets and the cutting edges of the buckets in a closed condition. COPYRIGHT: (C)2011,JPO&INPIT |
