| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a door lock structure that firmly fixes a door when pressure inside a switchgear rises and that enables the door to be opened/closed even after the occurrence of an accident. <P>SOLUTION: The device is used to fix a door of a switchgear that comprises a casing 11 having an opening, a frame portion 12 that is formed at the peripheral edge of the opening, a door that airtightly seals the casing by covering the frame portion, a U-shaped cross-section bent portion that is provided at the back edge of the door in the state of facing the frame portion, and a handle 6 that is provided on the front surface of the door. A lateral side of the frame portion is provided with a slide plate 1 that vertically slides in synchronization with an opening/closing operation of the handle, and a lock member that has a fishhook-shaped engaging element and that is pivotally supported on the frame portion in a rotatable manner by a support. The door has an engaging hole provided in a position corresponding to the lock member. When the door is closed and the handle is operated to the opening position, the engaging element is housed in the frame portion. When the handle is operated to the closing position, the engaging element and the engaging hole are engaged with each other along with synchronous sliding of the slide plate. <P>COPYRIGHT: (C)2012,JPO&INPIT |
