| 摘要 |
This invention provides a load bearing quick-base that is applied directly to the adjustable-height slot structure of a modular frame upright that is also used ubiquitously to support adjustable-height accessory brackets. By employing a set of upper (or "first") tabs and a set of spaced-apart, lower (or "second") tabs, the clamp can be firmly secured to the upright's front, slot-containing face as needed at any desired height in the same manner as a shelf bracket. The clamping system provides a clamp frame adapted to support a load, such as a swing arm support, that depends therefrom. The clamp frame has a first (or "upper") tab structure with a first tab assembly including a first tab shoulder sized and arranged to engage an interior face of the base member (such as a slotted upright) adjacent to a first slot structure on the base member. There is also provided a movable (or "lower") tab structure that is pivotally and slidably mounted with respect to the clamp frame. This second movable tab structure includes a second tab assembly having a second tab shoulder sized and arranged to engage an interior face of the base member adjacent to a second slot structure on the base member. The second tab structure is served by a locking member, which can be a spring-loaded, rotating bale, which selectively locks the movable tab structure against movement relative to the frame so as to retain the second tab shoulder and the first tab shoulder in a fixed relationship.
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