| 摘要 |
PROBLEM TO BE SOLVED: To prevent supports from being inclined by adding small metal plate pieces in the outside of respective edge pieces extending in the thickness direction of each shelf board, bringing the side of the support in close contact with the side faces of the small metal plate pieces in the thickness direction, and pinching the both sides of the support between the side faces of the small metal plate piece. SOLUTION: A shelf plate 1 is so formed that edge pieces 12-15 of the width (x) are added to four sides of a plate 11 composed of square board PQRS and fold-back pieces 16-19 of the width (y) as the metal plate small pieces are added to the respective edge pieces 12-15. All the fold-back pieces 16-19 are notched the both ends by square parts 20 of the length (z) and the respective fold-back pieces 16-19 are folded so as to be coincided with the respective edge pieces 12-15 in the same direction to the plate 11. Secondly, the respective edge pieces 12-15 are bent so as to be erected to the plate 11 with the respective fold-back pieces 16-19 followed thereto and the whole becomes a shallow box shape. The both sides of the support 6 in the side wall part in the corner of the rear four corners of the box body are pinched between the side faces of the respective fold-back pieces 16-19.
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