| 摘要 |
A fall prevention device of a stacking door is provided to prevent an accident by preventing the sudden fall of a door panel of a stacking door in an emergency, and to extend the service life and to increase safety in use by preventing the breakage of a stacking door. A fall prevention device of a stacking door comprises a housing(200) attached with covers at two sides, fixed with a driven shaft(120) rotated by a bearing via the covers and the housing and coupled with a lifting sprocket, a sub sprocket and a driving sprocket, and provided with at least one hanging grooves(202) along the inner circumferential surface of the housing, a rotary drum(230) fixed with the rotary drum inserted to the inside of the housing and formed to have the smaller diameter than the inside diameter of the housing to be rotated at the certain distance from the inside diameter of the housing, a braking rod(240) inserted to a working groove(232) of the rotary drum and provided with a retreated groove, a fixing bolt fitted to the retreated groove of the braking rod, a washer fixing member coupled to the fixing bolt via the washer, and a spring fitted to the outer circumferential surface of the fixing bolt and suspended on the bottom of the retreated groove of the braking rod by an end projection and a washer. |
