| 摘要 |
Mechanism with a chain for preventing theft of drain cover includes a steel chain (3) of spring steel that can not be cut with scissors for the armature. At one end of steel chain (3) is fixed with a weld (3.1) a metal plate (4) which is fastened with a steel pin (5) to the grate (1) of the drain. Steel pins (5) are fixed with welds (5.1) to the steel plate (4). At the other end of steel chain (3) is fixed with a weld (3.2) a metal plate (7), which is attached with a screw (8) screwed into a thread slit metal sleeve (6),to a wall (2) of the drain. Screw (8), is fixed with a weld (8.1)to the metal plate (7). The good side is that this mechanism does not interfere with the normal flow of water through the grate (1) of the drain and does not interfere with setting up the drain hose for cleaning sewers. |
