| 摘要 |
A slide-out room (12) support system (28) for a recreational vehicle (10) has outer C-shaped rails (34) received at least partially within the thickness of the floor (64) with the slot of the C-shape opening downwardly. A fixed support (30) extends up through the slot and mounts four rollers (38), two on each side, which extend into the space between the top wall (42) of the rail (34) and the flanges (40) so as to support the rail (34) generally horizontal and relieve much of the weight of the slide-out room (12) from being borne by the stationary floor of the recreational vehicle (10). A lead screw (46) that moves longitudinally with the rail (34) drives it in and out, and a rack (60, 70) and pinion (62, 68) system synchronizes the movement of the rails (34) when two or more rails (34) are provided. The lead screw (46), or alternatively the rack (60, 70) and pinion (62, 68) system, may be manually or electrically driven.
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