| 摘要 |
A corner bracket assembly for use in an associated frame assembly is provided. The corner bracket assembly comprises a body, a first leg and second leg. The first leg extends from the body and is adapted to be connected to a first frame member of the associated frame assembly. The second leg extends from the body in a direction approximately normal to the first leg and is adapted to be connected to a second frame member of the associate frame assembly. The corner bracket assembly further comprises a roller element rotatably mounted within one of at least two axially spaced positions in at least one of the body, the first leg, and the second leg. The roller element protrudes outward a selected distance relative to at least one of the body, the first leg, and the second leg.
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