Feeding and discharging apparatus and annealing furnace using such apparatus

A feeding and discharging apparatus, comprising a rack, two guiding rails, a traction cart, and a material cart, wherein

• the rack extends linearly;
• the two guiding rails are respectively located on two sides of the rack, the two guiding rails both extend linearly and are parallel to the rack, and side walls of the two guiding rails are each provided with a depression extending along a length direction of the guiding rail;
• two sides of the traction cart are each provided with a traveling wheel and a guiding wheel, the traveling wheels on two sides of the traction cart rollably abut against top surfaces of the two guiding rails, respectively, and the guiding wheels on two sides of the traction cart rollably abut against top walls of the depressions of the two guiding rails, respectively;
• the traction cart is provided with a driving gear and a driving mechanism for driving the driving gear to rotate, and the driving gear meshes with the rack, such that the driving gear rotates forward or backward to drive the traction cart to move forward or backward along the rack;
• and
• the material cart is movably disposed on the two guiding rails, and the traction cart is configured to drive the material cart to move forward or backward along the guiding rails.