| 摘要 |
<p>PURPOSE:To attain compactness and to reduce the cost, by using a torque of a supply reel motor selectively via a shaft inserted in a hollow drive shaft and performing automatic tightening and releasing of the supply reel to a hub. CONSTITUTION:In tightening the supply reel 12 of the magnetic device to the hub, a solenoid 7 is energized at the loading of the magnetic tape at first. In this state, when the supply reel motor 1 rotates, a nail 10 of a flange 6 touches a shaft 8 and the flange 6 is braked. A male screw 5 fixed to the cam shaft 3 is rotated with the supply reel motor 1, moved backward along a female screw at the inner wall of the flange 6, a cam 11 is moved backward and the supply reel 12 is locked with the movement. When the lock is finished, the braking of the flange 6 is released by deenergizing a solenoid 7, the flange 6 is rotated together with the supply reel motor 1 and goes to the next operation.</p> |
