Truss type automatic reel winding and unwinding machine

The utility model discloses a truss type automatic take-up and pay-off machine which comprises a take-up mechanism and a pay-off mechanism, the take-up mechanism and the pay-off mechanism are adjacently arranged and respectively comprise a conveying line, a supporting truss, a magnet clamp, a clamp transmission assembly, a small trolley and a trolley pushing switching system, the top and the two sides of the supporting truss are open, and the magnet clamp is arranged on the supporting truss. The conveying line penetrates through the front side and the rear side of the supporting truss and is used for conveying baking trays, the clamp transmission assembly is installed on the top of the supporting truss and is used for driving the magnet clamp, the trolley pushing switching system is parallel to the conveying line and is arranged in the supporting truss, and the small trolley is used in cooperation with the trolley pushing switching system and is used for transferring the baking trays. According to the tray co