| 摘要 |
<P>PROBLEM TO BE SOLVED: To enable a column that needs to be attached/detached to be easily attached/detached by operation of the column itself without using other raising means. <P>SOLUTION: A floor plate 10 is attached on a upper frame bottom plate 9 as the floor plate is supported by a plurality of columns. In this constitution, a left rear column 16 that needs to be attached/detached out of each column is provided with a spacer 35 for increasing a height dimension of the column and a screw hole and a bolt 39 as screw means for supporting a load on the spacer 35 in place of the spacer 35. The spacer 35 is removed as the load on the spacer 35 is supported by the screw means so as to reduce the column height dimension and the left rear column 16 is removed as the load is supported by other columns. <P>COPYRIGHT: (C)2012,JPO&INPIT |
