| 摘要 |
PROBLEM TO BE SOLVED: To simplify structures of portions in which a right side plate part, a left side plate part, a top plate part, a bottom plate part and a back plate part are fixed to one another.SOLUTION: A back plate part 6 is fitted in back storage parts 19;29 of left and right side plate parts 2;3, nut members 17;27 of the left and right side plate parts 2;3 and nut storage parts 38;41 of a top plate part 4 are fitted to one another, bolt members 65;75 pass through the top plate part 4 and are fastened to the nut members 17;27 by screwing, head parts of the bolt members 17;27 are stored in head storage parts 39;42, nut members 18;28 of the left and right side plate parts and nut storage parts 52;55 of a bottom plate part 5 are fitted to one another, bolt members 70;80 pass through the bottom plate part 5 and are fastened to the nut members 18;28 by screwing, and head parts of the bolt members 70;80 are stored in head storage parts 53;56. |
