| 摘要 |
PROBLEM TO BE SOLVED: To drastically reduce the facility investment amount and to restrain generation of strain by molding a plurality of frame parts for constituting a frame by one press mold, and improve workability and machinability. SOLUTION: This frame structure is provided with a plurality of frame parts 3 arranged on the lower surface of a load-carrying platform floor panel and formed into the approximately same shape. In this case, the mutually adjacent frame parts 3 are integrated with each other by being joined to each other by connecting parts 6, 7 of longitudinal and lateral frame parts 4, 5, and the whole of a frame 1 is constituted.
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