| 摘要 |
In a feeding device (1) comprising turret arms (10a, 10b) having spindle shafts (12a, 12b) for supporting a web roll (13), an air brake (14A) for applying a braking force in a rotating direction to the spindle shafts (12a, 12b), and an accelerating motor (15A) for applying a drive force in the rotating direction to the spindle shafts (12a, 12b) and a braking force in the rotating direction to the spindle shafts (12a, 12b), a braking force control device has a tension control device (21) which exercises control such that if a braking force required for the spindle shafts (12a, 12b) is lower than a constant value, only the braking force from the accelerating motor (15A) is supplied to the spindle shafts (12a, 12b), and that if the braking force required for the spindle shafts (12a, 12b) is higher than the constant value, the braking force from the accelerating motor (15A) is supplied to the spindle shafts (12a, 12b), and the braking force of the air brake (14A) is supplied to the spindle shafts (12a, 12b).
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