| 摘要 |
PROBLEM TO BE SOLVED: To manufacture concrete moldings with a fine and delicate surface and high strength by actuating a rocking table on which a concrete frame is placed in a horizontal circular motion or a horizontal elliptical motion on the horizontal plane. SOLUTION: A rocking table 2 on which a concrete frame 1 for a ready mixed concrete to be poured is placed, is actuated in a horizontal circular motion on the horizontal plane with an intermediate table 3. The intermediate table 3 is moved vertically with a reference table 4. A spherical bearing member 7 is provided in the four corners together with horizontal circular motion mechanisms 61, 62 between the intermediate table 3 and the rocking table 3, and the rocking table 2 is supported so that it is allowed t move freely with the intermediate table 3. In order to impart a centrifugal force to the concrete frame 1, the motion to be generated may be not only circular but also elliptical. Further the mechanism for imparting the elliptical motion can be appropriately selected and used whether it be a widely known cam mechanism, or a likewise widely known ring mechanism or the like. |
