| 摘要 |
A clamp for mounting an angle bracket on a tubular upright having a side member, an outer jaw and an inner jaw coupled to the side member, and coupling means permitting the side member to pivot relative to the angle bracket about a fixed or non-fixed pivot axis. The inner and outer jaws preferably feature contact surfaces that are portions of circular, cylindrical outer surfaces, but in any case are shaped to contact the cylindrical outer surface of the upright. The clamp is attached to the angle bracket and the jaws are pivotally mounted in the clamp so that the jaws have the necessary number of degrees of freedom with respect to the side member to permit them to contact the upright on extended areas.
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