To improve workability and reliability by preventing the damage of the wall surface of an opposite vessel by a bucket.
The bucket 21 is composed of a bottom plate 22, left-right side plates 23, 23, left-right side edges 24, 24, a cutting edge 26 and the like. The cutting edge 26 for the bucket 21 is constituted of a mounting plate section 27 fixed onto the bottom plate 22 and each side edge 24 and a projecting curved extending section 28 extended to a front from the mounting plate section 27 and projected to a front from the side edge 24. When slurry lifting works are conducted under the state, in which a revolving super structure is revolved, the extending section 28 of the cutting edge 26 collides with the interior wall surface of a soil-sand housing section, and the collision with the interior wall surface is relaxed and the damage of the interior wall surface is prevented.
HANEDA KIYOSHI
KAWASAKI CHOJI
