| 摘要 |
Novelty: a fluctuable shaped metal frame for folding security railings is disclosed. Constitution: two gamma-shaped beams A the horizontal side of which is intersected with the shaped beam &Ggr; being of slightly greater cross section and enclosing the two horizontal sides of the beams A so that these last can fluctuate. At the lower part of the gamma-shaped beams A, there are internally adapted the shaped beam &Dgr; bearing the security pin E fixing the metal shaped frame for security reasons. The beam &Dgr; features smaller dimensions and enters the lower end of each vertical side of the beams A. For horizontal and vertical fluctuation in relationship to the frame, there are selectively used the two beams A for horizontal fluctuation and the two beams &Dgr; for vertical fluctuation. Advantages: easy, simple and fast application of the security railings in wide-range openings of different in width and height dimensions; potential standardization of said railings to respond to ordinary dimensions of openings met in constructions for construction and installation time savings. It can be placed by non-specialized technicians or even by any one who is habile to utilize hand-operated tools. Possible carelessnesses in the measurement of the command to be executed are minimized while possible gaps habitually presented in classic steady metal frames between frame and wall are restricted. |
