A driving mechanism, which drives a pull-out assembly up to an interior of
a reel hub of a take-up reel, has a shaft which is inserted in a through
hole bored in a grabber with a clearance. A shutter fixes the pull-out
assembly in a receiving portion at a predetermined position on receiving
the pull-out assembly in the receiving portion. A positioning member
positions the shaft with a center of the shaft substantially coincided
with a central axis of the take-up reel and with the clearance held
between the shaft and an inner wall of the through hole when the pull-out
assembly is received in the receiving portion.