BOX MAKING MACHINE

PROBLEM TO BE SOLVED: To provide an efficient box making machine. SOLUTION: In a box making machine for producing a corrugated cardboard case by folding the inner and outer flaps of the bottom part of corrugated cardboard for the case in turn and sealing the butt part of the outer flap, rollers 532, 632 are fitted to folding arms 531, 631 for folding the outer flap D3 of the corrugated cardboard D for the case, whose one end is pivoted on a box making machine main body 1, by the oscillation from a suspended state to a horizontal state, the rollers 532, 632 can be rotated by shafts approximately parallel to the longitudinal direction of the arms 531, 631, when the arms 531, 631 are in an approximately horizontal state, the upper surfaces of the rollers 532, 632 are protruded upward from the upper surfaces of the arms 531, 631.