| 摘要 |
A lock for rolling shutters, swinging doors and section doors, comprising a box (1-3), a box covering (19), a pair of bolt actuating members (15) selectively displaceable between withdrawn positions and extracted positions, and an operating system of toothed wheels (10,13) intended for driving the bolt actuating members (15) under control of a lock cylinder (26) included in a cylinder lock unit (15). According to the invention, the cylinder lock unit (15) is connected to the lock box covering (19) by means of at least one screw acting between the box covering (19) and the cylinder lock unit (25); the screw is accessible by a maneuver tool through at least one corresponding bore (7) formed in the front wall (1) of the lock box, and the lock comprises a shutter member (11) arranged for preventing the insertion of the tool through the bore (7) when the lock cylinder (26) is situated in any position different from a preestablished change position, which can be attained only by rotating the lock cylinder (26) by means of the corresponding key (28). Preferably, the shutter member (11) is formed by a flange portion (11) of the central toothed wheel (10) of the lock operating system, and this central toothed wheel (10) is embodied by means of a half-shear operation from a metal plate disk whose periphery forms the flange (11). |
