| 摘要 |
PROBLEM TO BE SOLVED: To improve the stirring efficiency of a stirring blade and to make the stirring blade light by weight in a stirring device structured so as to house a object to be stirred, which is formed by incorporating foreign matter having a larger size than that of a granular material or a bulky material thereinto, in a hollow chamber formed in long sideway and to drive and rotate plural stirring blades provided in the hollow chamber. SOLUTION: The stirring blades 20 are attached to a rotary shaft 2 provided coaxially or in parallel to the axis line of the hollow chamber at a prescribe interval and the stirring blades adjacent each other having the tip part of each stirring blade on a spiral line formed with the rotary shaft 2 as the center have prescribed angle shift successively from one side toward another side.
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