Patent ID: 6491252
Filing Date: 2002-12-10
Classification: B65H

Abstract:
A winding core holding mechanism for holding at least one end portion of a winding core on which a thin medium such as paper, film, or cloth is wound, comprising:a base fixed in the axial direction of said winding core; a larger diameter reference portion, which is capable of axially moving in and out of said base and abuts an end face of said winding core; a tapered larger diameter centering portion, which is capable of axially moving in and out of said larger diameter reference portion and fits into a winding core of larger diameter; a smaller diameter reference portion, which is capable of axially moving in and out of said base and abuts an end face of a winding core of smaller diameter; and a tapered smaller diameter centering portion, which is capable of axially moving in and out of said smaller diameter reference portion and fits into said winding core of smaller diameter; wherein in order to hold said winding core of larger diameter, said larger diameter centering portion centers said winding core while falling into said larger diameter reference portion, and also said larger diameter reference portion falls into said base to position said end face at a predetermined reference position with respect to said base; in order to hold said winding core of smaller diameter, said smaller diameter centering portion centers said winding core while falling into the smaller diameter reference portion, and also said smaller diameter reference portion, said larger diameter reference portion, and said larger diameter centering portion fall into said base to position said end face at said reference position.