| 摘要 |
<p>PURPOSE:To simplify structure and to facilitate mounting, by a method wherein the fulcrum member of a locker arm is formed to be changeable into a direct fulcrum state and a floating state, and the fulcrum member engages with an engaging hole in a retainer member to support it thereat. CONSTITUTION:With a forcibly pressing member (cam member) 19 moved, a fulcrum member 13, forcibly pressed through an intermediate member 17, is forcibly pressed against a locker arm 12, and this causes the locker arm 12 to be rockable around the fulcrum member 13 to operate a suction valve 5b for high load through rotation of a cam shaft 9. Rotation in an about 180 deg. arc of the forcibly pressing member 19 brings the fulcrum member 13 into a floating state and the suction valve 5b into an inoperative state.Further, the fulcrum member 13 is slidably engaged with and held in an engaging hole 14b, vertically extending through, in a retainer member 14 integrally provided with a cam cap 14c forming the bearing of a cam shaft 9, and this facilitates supporting of the fulcrum member 13 through a simple construction.</p> |
