| 摘要 |
PROBLEM TO BE SOLVED: To raise the strength of a shelf frame where sub-beams arranged in a depth direction are disposed at an appropriate interval in a frontage direction between pairs of front and rear main beams arranged in a frontage direction while reducing a cost.SOLUTION: Horizontal plate parts 16b projecting inward at the intermediate height positions and vertical plate parts 16a drooping down from the internal sides of the horizontal plate parts are formed in the length direction in main beams 3a, 3b. Projection parts 10, 11 to be placed on the horizontal plate parts 16b of the main beams 3a, 3b and overlap plate parts 12 that are formed by allowing both side plate parts 5, 6 to mutually overlap by bending on the lower sides of the projection parts 10, 11 and also are adjacent to the vertical plate parts 16a are formed at both of the ends of the side plate parts 5, 6 in the length direction in sub-beams 4. The overlap plate parts 12 are fastened to the vertical plate parts 16a of the main beams 3a, 3b with the use of fixtures (bolts and nuts 20, 21) to horizontally penetrate the plate parts. |
