Conveyor in plastic working machine

In a working machine having pairs of lower dies and upper dies disposed on a plurality of working stations, respectively, for cooperatively working a workpiece at the respective stations, the stations being set at intervals in a direction of conveyance of the workpiece,

• a conveyor which comprises:
• a pair of transfer bars spaced from one another a predetermined distance and disposed on opposite lateral sides of the working stations and extending parallel to each other in the conveying direction, said pair of transfer bars being unitarily movable in a vertical direction and in said conveying direction by respective driving means;
• a plurality of arms disposed laterally bridging between the transfer bars so that each arm extends the full predetermined distance, said arms, except for at least one arm, being fixed to said transfer bars in a manner non-movable in the conveying direction relative to said transfer bars, said at least one arm being adjustably movable relative to the bars in the conveying direction by a drive mechanism;
• and
• a handling mechanism provided for each arm for holding the workpiece.