| 摘要 |
PROBLEM TO BE SOLVED: To discharge static electricity generated when a film and the like is wound around a winding core, to the outside through a chuck. SOLUTION: In the winding core 11, through holes 4 penetrating from the inside to the outside are provided on axial both end portions of a resinous cylindrical core material 2, and conductive resin is coated on the outer peripheral surface of the core material 2 to form a conductive layer 3, and the through holes 4 are filled with the conductive resin to form a short-circuit portion. The short-circuit portion 5 is exposed on the inner peripheral surface of the core 2 while conducting with the conductive layer 3. The conductive chuck 10 is fitted in the inner periphery of both ends of the core 2, so that the chuck 10 contacts with the short-circuit portion 5, and static electricity generated on a film F is discharged through the chuck 1 in a grounding condition. The chuck 10 has a holding member 15 actuated by compressed air supplied to a cylinder chamber 13 in the inside. The holding member 15 press-contacts with the inner periphery of the core 2, so that the winding core 11 is fixed to the chuck 10 and enabled to rotate. At that time, the holding member 15 contacts with the short-circuit portion 5 to make the conductive layer 3 be in the grounding condition, so that work of grounding is unnecessary. COPYRIGHT: (C)2004,JPO&NCIPI
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