| 摘要 |
PURPOSE:To permit the intermittent shift of a driving shaft smoothly and free from power loss by inserting an engaging body having a tapered hole, onto a driving shaft through a tapered body and shifting the engaging body in the longitudinal direction against a spring. CONSTITUTION:When a driving lever 4 is pulled rightward, a driving body 24 shifts in the same direction against the force of a spring 40. Since a tapered body 34 is urged in the reverse direction by the force of an inside spring 39, the tapered body 34 shifts with the driving body 24 and is press-attached with a driving shaft 14 and shifts the driving shaft 14 rightward by a certain distance. When the pulling of the driving lever 44 is released, the driving body 24 slides speedily than the tapered body 34 since the retaining strength of the spring 40 is larger than that of the spring 39, and the press-contact of the tapered body 34 onto the driving shaft is released, and only the driving body 24 and the tapered body 34 return to the original positions. When the driving lever 44 is operated in the reverse direction, the tapered body 34 is press-attached onto the driving shaft by a releasing body 54 and a spring 33, and the driving shaft is shifted leftward by a certain distance by the similar action. |
