PURPOSE: To provide a stirring mechanism of rectangular form which has a high working efficiency.
CONSTITUTION: A rod 7a rotating in the E-direction is fitted with stirring blades 21a and a stirring head 23a and furnished with a bevel gear 27a, and a cutter 25 is installed through a shaft 18a on another bevel gear 29a meshing with the bevel gear 27a. A second rod 7b rotating in the F-direction is fitted with stirring lades 21b and a stirring head 23b and furnished with a bevel gear 27b, and cutter 5 is mounted through a shaft 18b on a bevel gear 29b meshing with the bevel gear 7b. When the rod 7a is rotated in the H-direction, the blades 21a and head 23a also rotate in the E-direction to perform excavation and stirring, and the cutter 25 in interlocking makes also excavation and stirring through the shaft 18a. When the rod 7b is rotated in the F-direction, the blades 21b and head 23b also rotate in the F-direction to conduct excavation and stirring, and the cutter 25 in interlocking makes also excavation and stirring through the shaft 18b.