| 摘要 |
<p>PURPOSE:To improve efficiency for a test by making the rotary shaft of a rotary head drum freely attachable/detachable in one rotating direction, regulating the rotation of the rotary shaft in the other rotating direction and regulating the rotary shaft of the rotary head drum in a circumferential direction. CONSTITUTION:A one-way clutch 21 is composed of rollers 211-213 and correspondent springs 215-217. A rotary shaft 14 is mounted while being inscribed to the rollers 211-213. When the rotary shaft 14 is rotated to right, the clutch 21 can not be rotated since the rotary shaft 14 receives the friction of the rollers 211-213 by fastening the rotary shaft 14 by rotating the rollers 211-213 pressed by the springs 215-217 to the inside. On the other hand, when the rotary shaft 14 is rotated to left, the rotational friction of the rollers 211-213 is not received since the rotating direction of the rotary shaft 14 is coincident to the direction of releasing the rollers 211-213. Therefore, the rotary head drum can be easily inserted by inserting the rotary shaft 14 among the rollers 211-213 of the clutch 21 while rotating the rotary shaft 14 to left.</p> |
