| 摘要 |
<p>The shutter for the security of building closures comprises an outer wooden boarding (1), an intermediate steel-plated metal sheet (2), an inner wooden frame (3), the assembly being fixed by blind screws (4). The closure is comprised of a flush-mounted espagnolette (5) housed in sealed heads. The protection of the flaps is provided by a mortise joint of the metal parts (7). The security of the edges is provided by means of a corner piece (8) which is fixed by dowelling in the masonry boards and receiving a U-shaped profiled section (9) welded and embedded into the wooden frame (3). The hinges (10) are counter-welded and welded to the intermediate steel-plated metal sheets (2). This method of fabrication of shutters combines both the advantages of aesthetic and heat insulation qualities of wooden shutters with the security of a metal shutter thus designed as well as of the various security devices linked thereto.</p> |
