WINDING SHAFT FOR MANUFACTURING CORELESS SHEET ROLL AND MANUFACTURING METHOD AND MANUFACTURING DEVICE FOR CORELESS SHEET ROLL

摘要

PROBLEM TO BE SOLVED: To provide a winding shaft for manufacturing a coreless sheet roll capable of easily pulling out the long winding shaft from the wound coreless sheet roll having extraordinarily large width without destroying a shape of an inner peripheral side of the roll.;SOLUTION: This winding shaft 1 has a structure constituted by forming a plurality of channels 3 extending in the axial direction on a circumferential face 2 of the roll at an equal interval in the circumferential direction in a recessed manner, forming linear opposing fringe sides 3a deciding width W of each channel 3 and extending in the axial direction into a tapered shape having right-left symmetrical inclined lines by using parallel virtual lines Xa between the opposing fringe sides extended in parallel with an axis central line X of the winding shaft as basic lines, and enlarging the width of each channel 3 into a tapered shape gradually when approaching one end side 2b in the axial direction from the other end side 2a. The manufacturing method and the manufacturing device for the coreless sheet roll having this winding shaft 1 are provided.;COPYRIGHT: (C)2007,JPO&INPIT