Mechanism for arranging, taking and placing cutting knife rings

The utility model discloses a mechanism for arranging, taking and placing cutting knife rings. The mechanism comprises the knife rings, a supporting table, a side wall spacing frame, a side wall edge frame, a fixing shaft, a rotating shaft, a torsional spring, a sleeve, a pedal, a shifting plate, an air cylinder, a hinge piece and an opening and closing angle groove. Side wall spacing frames are arranged above the supporting table; side wall edge frames are arranged at the two ends of the supporting table, and the difference between the side wall edge frames and the side wall spacing frames is that protrusions used for installing fixing shafts are arranged on one sides of top backrests of the side wall edge frames. A shaft body of the fixed shaft is provided with a sleeve corresponding to a gap between every two side wall spacing frames; the inner part of the sleeve is fixed with the outer end of the torsion spring; the inner end of the torsional spring is fixed together with the fixed shaft; a pedal is horiz