Opening device and downward swinging machine

The invention discloses an opening device and a downward swinging machine. The opening device is used for the lower swing machine, the lower swing machine comprises a fixing support and two cloth guide rollers arranged on the fixing support, and the opening device comprises a sliding rail, a sliding block, an opening piece and a driving motor. The sliding rail is arranged on the fixed bracket; the sliding block is arranged on the sliding rail; the opening piece is arranged on the sliding block and is configured to move along the sliding rail along with the sliding block; the driving motor is used for driving the sliding block and the opening piece to slide on the sliding rail, and the opening piece is configured to be matched with the two cloth guide rollers in the sliding process to open the lower hem of clothes arranged on the two cloth guide rollers and the opening piece in a sleeving mode. In this way, the two cloth guide rollers and the supporting assembly are arranged on the lower hem machine to open th