Abstract: A turn-over mechanism for packaging asymmetrically shaped articles includes an image input arrangement having cameras arranged over a conveying path to observe from different angles the orientation of an article moving along the conveying path. A first auto-suck unit automatically selects a vertical or a sideward suction nozzle thereof to suck the article in response to an observation result of the image input arrangement, and transfers the sucked article to a suitable turn-over holder on a turn-over unit. The turn-over holder holding the article may be turned over by 180 or 90 degrees as necessary to adjust the article to a desired orientation, so that a second auto-suck unit or an auxiliary supporting unit sucks and transfers the article in the correct orientation from the turn-over unit to an automatic packaging machine for subsequent packaging.