PROTECTIVE DEVICE FOR CYLINDER LOCK

摘要

A protective device for a cylinder lock is provided in which a shutter plate supported on a casing so as to be capable of opening and closing a mechanical key insertion hole is capable of moving to an open position when a magnet lock is unlocked by a magnet key, wherein a restricting member (50) is disposed in the casing so as to be capable of moving between a restriction position in which the shutter plate (26) urged to an open position side is restricted to the closed position and a restriction release position, a slide member (64) that is slidably housed in the casing not only enables an insertion operation of the magnet key to an unlocked position but can also be moved from the unlocked position to a pushed-in position, and restriction release means (67) is provided between the slide member (64) and the restricting member (50) and moves the restricting member (50) to the restriction release position in response to the slide member (64) being pushed in to the pushed-in position in a state in which the magnet lock (25) is unlocked. This enables a shutter plate to be moved from a closed position to an open position by operation of a magnet key in one direction.