PURPOSE: To maintain the optimized packaging position during the packaging of a bale by mounting a rotatable plate disk on an end of the bale in a region of its contact with a support table so as to prevent displacement of the bale axis line in cooperation with the region of the table during the packaging thereof.

CONSTITUTION: A wide rotatable disk 23 is disposed in cooperation with the predetermined region of a load L during the packaging thereof so as to prevent displacement of the load. That is, the load L is confined to prevent displacement in the axial direction during the packaging of the load by mounting a disk on both ends thereof. Each disk 23 is mounted on the load so that the disk may be freely rotated from a support table 24 and that a convex form may be presented toward the load. The disk is mounted in cooperation with the lower region of the load L and also cooperates with the lowest region of both ends of the load L during the packaging thereof, the lowest portion of the disk being less than levels of rolls 18 and 19. This enables the bale to maintain the optimized bale position during the packaging thereof.