| 摘要 |
PROBLEM TO BE SOLVED: To prevent stone or clod from engaging between a screw and a feed member by attaching the tip of a screw conveyer in such a state as moving vertically about a rotational shaft fitted in a pair of support holes provided in a support frame rotationally journaling the rotational movement shaft. SOLUTION: A screw 4 is rotated so that concrete, etc., A fed from upward of a feed member 2 is conveyed to a discharge port 24, while mixing it by vanes 43 of the screw 4. Then, in some cases, a large stone, etc., A1 is mixed in the concrete, etc., A so that the stone, etc., A1 is engaged between an inclined face 21 of the feed member 2 and the vanes 43 of the screw 4. However, it is so constituted that a motor 3, the screw 4, and a connecting member 5 are integrated and rotationally moved by the rotary shaft 55 of the connecting member 5 so that the screw 4 is moved in the Y direction and prevent the screw 4 from non-rotated.
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