| 摘要 |
PURPOSE:To prevent a switching cam and guide of an oil damper from being deformed even if a plunger is actuated while being turned, by keeping the cam displaceable horizontally. CONSTITUTION:The head 2 of a plunger 1 has a long arched hole as a holder 9 and the upper end of a cam 5 is held movable lengthways by the holder 9, so that the cam 5 can travel horizontally on the head 2 while moving vertically together with the head 2. Even if the plunger 1 is slightly shifted due to a motion of a serviceman on the head 2, the cam 5 does not slant because its upper end is fitted loose to the head 2. This means that even if the oil damper is pressed while the plunger 1 is turned, the cam 5 is moved vertically along guides 6, 7 to actuate a switch for sure. |
