| 摘要 |
Pairs of convex and concave rollers 10, 11 are mounted on upper and lower rotary shafts 5, 6. A positioning unit 13 is slidably attached to a slide guide 12. When a rotatable member 15 is arranged at a standing position, an annular projection 10a of the convex roller engages with a groove on one end face of the rotatable member, or an annular groove 11a of the concave roller 11 engages with a projection on the other end face of the rotatable member. The positioning unit slides while stopping at the specified positions of the roller pairs. |
