| 摘要 |
PURPOSE:To enable a spool to be simply supported with accuracy by providing a holder main body which is fixed on a rotating shaft, with at least three support rods in such a way that the rods are arranged radially at regular space intervals inscribing the spool. CONSTITUTION:A holder 1 is intended to support a spool S while the center of a rotating shaft of the spool S corresponds with the center of the spool S. In this case, the holder 1 is composed of a holder main body 4 in a form of a regular triangular prisum which is fixed coaxially on the rotating shaft with plungers 5, two each of the plungers project from each of three sides of the holder main body. And each of the plungers 5 is composed of a cylinder 7 which is secured into a threaded hole made on the side of the holder main body 4, a support rod which is arranged movably in the longitudinal direction within the cylinder 7 inscribing the spool S, and of a spring 9 which energized the support rod 8 against the inner surface of the spool. |
