[PROBLEMS]: TO IMPROVE THE EFFICIENCY OF MAINTENANCE BY THE GRAIN STORAGE APPARATUS WHEREIN IS PROVIDED WITH A CONVEYOR CYLINDER ROTATING AROUND AN AXIS IN THE LONGITUDINAL DIRECTION OF THE MACHINE BODY AND ROTATING OUTWARDLY OF THE MACHINE BODY TO PREVENT THE ABRASION WITH THE CONVEYOR CYLINDER. [SOLUTIONS]: THE CONVEYOR SCREW (8) LOCATED BETWEEN THE FRONT WALL (IF) AND THE REAR WALL (28) OF THE GRAIN STORAGE APPARATUS (1) IS PROVIDED THE FRONT PART OF THE FIRST CYLINDER MEMBER (2) IS ATTACHED TO THE LOWER PART OF THE REAR WALL (28) OF THE GRAIN STORAGE APPARATUS (1) CONNECTING THE FRONT PART OF THE SECOND CYLINDER MEMBER (4) ATTACHED TO THE REAR PART OF THE FIRST CYLINDER MEMBER (2) TO THE VEHICLE FRAME (3) IN THE FIRST VERTICAL AXIS (5) OF THE SAME AXIS AS THE SAID SECOND AXI5 (Z) AND ARRANGING THE AXIS TO BE CAPABLE OF SEPARATING INDEPENDENTLY CONNECTING THE THIRD CYLINDER MEMBER (7) PROVIDED AT THE REAR PART OF THE SECOND CYLINDER MEMBER (4) TO THE BASE PART OF THE CONVEYOR CYLINDER (6) TO ROTATE RELATIVELY FREELY AROUND THE AXIS OF THE CONVEYOR SCREW (8) WHICH HAS THE SAME AXIS AS THE SAID FIRST AXIS (Y). [REPRESENTATIVE FIGURE] FIG. 2
