| 摘要 |
A workmen protecting safety light for roof perimeter edge protection includes a pair of invisible light beam units, one bearing a light beam source and the other being a light beam receiver/control, and a relay box together with audio warning and signalling apparatus. Supporting structure includes a base support frame, a sub-base, tripod support, vertically and horizontally adjustable support pipes and clamping structures. All the foregoing are combined to provide an easily, quickly and accurately installed perimeter safety light protection device. A plurality of specially sized and marked pipes, support brackets for the light units, and specific adjusting/clamping structures are all important features of the invention. Preferably, the units are supplied in kit form and, therefore, suitable containers are provided for holding same in compact, easily shippable and stored form, ready for quick and easy assembly at a job site.
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