| 摘要 |
The frame consists of parallel spacer bars (1, 2) of equal length, joined at points close to their ends by oblique struts (4a, 4b), each equipped with a sliding hook (5a, 5b) to connect the frame to one of the supports (8a, 8b). The oblique struts converge towards the bottom of the frame and are set at an angle which allows the hooks to descent by virtue of their own weight, while the struts can have a cross-section which prevents the hooks from rotating on them. The ends of the spacer bars can be recessed to engage with the surfaces of the supports, and the bars themselves can be made with a U-shaped cross-section to receive the ends of the struts. ADVANTAGE - Greater stability for supports, simple and quick to install at any height, and leaving more free space round supports.
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