| 摘要 |
PROBLEM TO BE SOLVED: To provide a jumping prevention apparatus for a roll core in a roll body box which can bring a locking bar into a locked state by one-touch operation when a roll body is stored, can release the locked state easily, and is at low cost and excellent in durability. SOLUTION: The locking bar is provided which can open and close an opening of a U-shaped installation part for placing the roll core, and an automatic locking cramp is provided which can fix the tip of the locking bar at the time of closing the opening by lowering the locking bar. In a front portion of the automatic locking cramp, a curved-like locking part is formed in which the lowered locking bar is brought into a locked state at a bottom dead point after the slide-contact of the front edge of the lowered locking bar. Furthermore, in a back portion of the automatic locking cramp, a lock-releasing part is formed which can release the locked state in the curved-like locking part by moving it upward manually. COPYRIGHT: (C)2008,JPO&INPIT
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