| 摘要 |
PROBLEM TO BE SOLVED: To provide an agitation device capable of preventing reliably the fall of a pin for connecting an agitation arm and a scraper.SOLUTION: An agitation device of the invention has a plurality of salients for preventing the dropout of a pin for connecting an agitation arm and a scraper, and the salients are formed in mutually different directions with respect to the radial direction of a pin axis part. If, therefore, the salient of one pin and the peripheral edge part of a hole are disengaged, the engagement between the salient of another pin and the peripheral edge part of the hole are kept so that the dropout of the pin is more reliably prevented.SELECTED DRAWING: Figure 4 |
