| 摘要 |
PURPOSE: A trailer for freight transportation is provided to improve the width range of a steel plate to be loaded by simultaneously extending a support frame upward and downward. CONSTITUTION: A trailer for freight transportation comprises a loading part. The loading part comprises a pair of mainframes, a base, a support, a support frame, and a cylinder(500). A pair of mainframes comprise a pair of outer mainframes(110') and an inner mainframe(120). The inner mainframe controls the gap between a pair of outer mainframes. The base comprises an outer base and an inner base. The inner base is projected to one side of the outer base. The support comprises an outer support and an inner support. The inner support is connected to a cylinder. The support frame comprises an outer support frame(410), an inner upper support frame(420), and an inner lower support frame(430).
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