| 摘要 |
<p>PURPOSE:To smoothly shift a cam member by forming a through hole on the cam member and installing a spring for urging an engaging pin for engaging the cam member at a projection position, into the through hole. CONSTITUTION:A through hole 11 is formed on a cam member 3 which can be shifted in the radial direction. An engaging pin 14 for engaging the cam member 3 at a projection position is installed in free appearance and disappearance inside a pin supporting member 12 contiguous to the cam member 3. A spring 19 for urging the engaging pin 14 is installed in the through hole 11. Therefore, the reaction force of the spring 19 is not applied onto the cam member 13, and the cam member 3 can be shifted smoothly in the horizontal direction.</p> |
