| 摘要 |
An expandable mobile house trailer which includes a relatively rigid main body portion having a floor structure and opposite pairs of vertical side and end walls thereabout. Two parallel arch beam supports are located inside of the main body portion. Each of the arch beam supports is positioned adjacent to and affixed to one of the vertical side walls of the main body portion. The ends of the floor are attached to the corresponding ends of the two arch beam supports. A plurality of vertical structural tension members is affixed at spaced intervals to each of the two arch beam supports. The floor is suspended from the lower ends of the vertical structural members. Two of the structural tension members on each of the two arch beam supports are paired, act as main support members and have substantially more structural strength than the other structural tension members. The floor of the main body portion has a wheel well opening on each side between the two paired structural tension members. There are two wheel units which each includes at least one wheel. Each of the wheel unit means is positioned in one of the wheel well openings and is mounted on each end to one of the paired structural tension members. The wheel of each of the two wheel units means is movable in a horizontal line which is parallel to the line of travel of the trailer. There is also a relatively rigid upper body section having a roof structure and vertical side and end walls which correspond, respectively, to and are positioned outside of the side and end walls of the main body portion. The upper body section is telescopically associated with the main body section. There is an arrangement for reacting between the main body section and the upper body section for raising and lowering the upper body section with respect to the main body section in the telescopically associated relationship.
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