| 摘要 |
PROBLEM TO BE SOLVED: To provide a soil discharge device which enables the rear end opening of a ribbon screw for carrying out drilled sediment including boulder drilled by a cutter head to be reliably closed when closed with a gate, while avoiding the gate from biting the drilled sediment, and which can sort the drilled sediment into boulder and the drilled sediment including small-diameter gravel, and then discharge them separately.SOLUTION: A gate chamber 17 is communicated with the rear end opening of a ribbon screw 12, a gate 16 provided in the gate chamber 17 is constructed by double-leaf left and right door plates 16a, 16b, and the opposed end faces of the left and right door plates 16a, 16b are formed as inclined end faces V-shaped in cross section to ensure their joint when closed. Furthermore, the gate chamber 17 is communicated through a classification chamber 20 having classification means for boulder B and the drilled sediment with a screw feeder 50 for carrying out the drilled sediment including the small-diameter gravel so that the boulder B in the gate chamber 17 is discharged from a discharge port 24 to the outside. |
