NON-DIRECTIONAL SMOKE CONTROL DAMPER HAVING CHAIN GEAR-TYPE BLADE ADVANCING AND RETREATING DEVICE

摘要

The present invention relates to a non-directional smoke control damper having a chain gear-type blade advancing and retreating device. The non-directional smoke control damper includes a central blade (11), a plurality of outer blades (12), and a blade advancing and retreating device. The central blade (11) and the plurality of outer blades (12) have outer edges overlapping one edge portion of the opening, and a support shaft (110) passes through the portion at which the edges overlap. The rear end of the support shaft (110) passes through and couples to a shaft coupling plate (230). When the central blade (11) moves in the forward direction, the plurality of outer blades successively move in the forward direction. Also, since a gap is generated between the edges of the central blade (11) and the adjacent outer blade and between the edges of the anterior outer blade and the posterior outer blade, a ventilation opening is formed through which air currents may be introduced into the front chamber.