| 摘要 |
<p>An improved structure of a fitting shaft (1) for preventing screw tightening state from becoming loose due to vibration of a printing press, etc, equipped with a flanged roll receiver (2) fixed at one of the ends thereof, comprising a cylindrical support core (8) having a diameter smaller than the diameter of a hole of roll paper fixed to the other end of the shaft and having the outer circumference thereof threaded with different diameters and in different directions through a step portion at the center, a flanged and threaded roll receiver (12) meshing with a large diameter threaded portion (8a) of the support core (8) and a loosening prevention screw (14) so constituted as to mesh with a small diameter threaded portion (8b) of the support core (8) and to come into contact with the flanged and threaded roll receiver (12). This structure can prevent loosening even when any vibration occurs in the printing press.</p> |
