| 摘要 |
A cargo truck trailer has telescoped box-like top and bottom body portions with mechanism operated from a single control station which will raise and lower the top body portion to provide maximum cargo space that will clear overhead structures such as viaducts along the intended travel route so that a single vehicle trailer becomes useful at maximum capacity over a designated route. The top or roof body portion is guided by ribs or struts of the bottom body portion. The mechanism which raises and lowers the top body portion is housed within the bottom body portion preferably between its outer skin and inner liner. The control station is a single crank which drives gears and chains to simultaneously rotate a plurality of vertical screw rods at the corners and midsection of the body to raise and lower nut members carried by the top body portion. An access door or tailgate is supported on telescoped tracks which accommodate the raising and lowering of the top body or roof portion so that the cargo section may be completely closed regardless of its selected height.
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