| 摘要 |
An apparatus for supporting one or more theatrical panels and, in a more specific aspect, a carriage assembly adapted for such task in association with a horizontal track having an upper guide surface and a lower guide surface, provide horizontal movement quietly, smoothly, with low frictional resistance and in a highly-linear fashion with low rock and sway. A horizontal track comprising an upper guide surface and a lower guide surface supports a carriage assembly having a plurality of upper guide wheels and a plurality of lower guide wheels. The upper guide wheels are supported in rolling contact with the upper guide surface and the lower guide wheels are supported in rolling contact with the lower guide surface. The axles supporting the upper guide wheels are preferably horizontally offset from vertical lines extending through any of the axles supporting the lower guide wheels. The guide wheels are preferably resilient at least at the surface and grooved to engage the guide surfaces.
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