| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a structure capable of easily and reliably lifting/lowering a bottom plate, in a concrete mold, in which a core is arranged in a mold space formed by the bottom plate and a peripheral mold plate, the bottom plate includes a protrusion for forming an opening of a concrete molded article on an upper surface, and the concrete molded article is removed from the core in a horizontal direction by lowering the bottom plate lifted/lowered in a vertical space formed at the base mold and the peripheral mold plate, lowering the bottom plate at a position in which the protrusion of the bottom plate does not interfere with the concrete molded article after the molding. <P>SOLUTION: A wedge body 4 is interposed between a bottom plate 2 and a base mold 1. The engaging bottom plate 2 is lifted/lowered by using a slope surface 41 of the wedge body 4 sliding in the base mold 1. The wedge body 4 is a plate body in which an engagement surface with the bottom plate 2 comprises the slope surface 41 and a horizontal surface 42 forming the top. A recess 23 having substantially the same shape as the wedge body 4 is formed at an engagement surface of the bottom plate 2. <P>COPYRIGHT: (C)2013,JPO&INPIT |
