JPS6443932A - Dustproof structure for enclosed switchboard - Google Patents

Abstract

PURPOSE:To aim at improvements in operability on an apparatus at the outside of a switchboard and dusttightness at the time of switchboard inside insertion by attaching each movable dust cover to a front plate of the drawer type appara tus and a lower part at both sides of it, and lowering this movable dust cover to some extent at the time of inserting it into the switchboard inside. CONSTITUTION:A cover moving device 3a jumped out by a notch 3f at the upper part of a dust preventer cover 3c hits on a switchboard fixed frame 4a and lowered down when it is inserted into the switchboard by a movable dust cover 3b attached to a front plate 2 of a drawer type apparatus and a lower part at both sides, whereby, the movable dust cover 3b is lowered by a fixed pin 3d clamping the cover moving device 3a and the movable dust cover 3b, and a clearance S1 between a floor surface of a board box body 4 and the front plate 2 is thus minimized. With this constitution, the clearance S1 of more than equality of the conventional apparatus is secured at the outside of the switchboard and mobile operability is improved, and simultaneously at the time of insertion into the switchboard inside, the clearance S1 becomes minimum, thus admission of small creatures or the like is surely preventable, so that dusttight and insect proof are improved.