| 摘要 |
A height adjustable pylon (2, 15) and supporting frame assembly (1) is provided. The frame includes two frame members (3) meeting at a corner with the frame members being generally co-planar and the pylon (2, 15) being urged into the corner so as to extend at generally right angles to a plane including the two frame members. A fastener assembly has two end portions (23) each anchored relative its associated frame member so as to extend transversely to it. The fastener assembly (21) includes an intermediate saddle portion (22) engaging a surface of the pylon (2) that is directed outwardly relative to the corner with the pylon being urged into the corner when the fastener assembly is tightened to engage the pylon and lock it axially relative to the frame members (3) in a selected position. Preferably, the frame members each form two upper and two lower frame members of two trusses. Lower ends of the pylons may support the assembly. |
