| 摘要 |
PROBLEM TO BE SOLVED: To provide a grab bucket for a dredging construction which can certainly drain a spill stream in each shell in a short time, and has a waste water treatment effect.SOLUTION: In a grab bucket for a dredging construction which is composed of: an upper support member suspended by a support wire; arm members having one-side ends pivoted rotatably to both ends of the upper support member; shells 3 which are rotatably pivoted to other ends of the arm members, and have open upper ends; and a lower support member which rotatably pivots an end of each shell 3 under the upper support member, and to which an opening/closing wire is connected, a bag body 5 which is swollen inside each shell 3 is installed above in each shell 3 in order to extrude upper water in each shell 3 from an open upper end of each shell 3 to the outside when both the shells 3 are closed to scoop earth and sand, etc., and also an upper stopper member 6 and a lower stopper member 7 which suppress the vertical movement of the swollen bag body 5 are provided above each shell 3, respectively. |
