| 摘要 |
PROBLEM TO BE SOLVED: To prevent a stirring shaft of a stirrer from dropping out of a driving shaft.SOLUTION: A key member 13 is fixed to a first longitudinal groove 40e of the stirring shaft 40 with a bolt 18, the stirring shaft 40 is inserted to the shaft hole 12a of a second coupling 12, a falling preventing member 14 which inhibits the stirring shaft 40 from falling from the second coupling 12 is arranged to the base end surface 40d of the stirring shaft 40, a washer 15 is arranged on the falling preventing member 14 and is fixed to the falling preventing member 14 with a bolt 19, the falling preventing member 14 is fixed by screwing a nut 16 tightly to the bolt parts 40g of the stirring shaft 40, a first tongue piece 15b of the washer 15 is bent and installed along the side surface 16a of the nut 16 and a second tongue piece 15c of the washer 15 is bent and engaged to a notch part 14b of the falling preventing member 14, and the second coupling 12 attaching the stirring shaft 40 is fastened to the first coupling 11 rotating integrally with a driving shaft 52a of a driving part 50. |
