| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of reducing carrying capacity of a screw blade, when a plate member exists on the outer periphery of an upper side blade surface of the screw blade, since a vertical intermediate part of the plate member is fixed in a spiral shape to the outer peripheral edge of the screw blade.SOLUTION: In an excavator, a screw 10 is constituted by providing a screw blade 12 in a spiral shape on the outer periphery of an excavation shaft 11 for providing an excavation head 13 in a lower part, and a part of the screw blade 12 is provided with a stabilizer part 14 for checking the screw 10 in inclining by abutting on an inner surface of an excavation vertical hole, and the stabilizer part 14 is constituted by providing a plate member 15 of a vertical plate shape in a spiral shape toward the lower side from the outer peripheral edge of a sediment carrying surface 16 of the screw blade 12.SELECTED DRAWING: Figure 1 |
