| 摘要 |
<P>PROBLEM TO BE SOLVED: To easily arrange a ball between a guide groove and a second longitudinal groove. <P>SOLUTION: A part including a portion at which at least the second longitudinal groove 31 is located out of an upper end of a cylinder 20 is constituted of an attachable/detachable division part 72. A ball 71 is separably connected to part constituting the inner surface of the second longitudinal groove 31 at the division part 72. The division part 72 and a cylinder constituting member 73 with the ball 71 integrated therewith are attached to the upper end of the cylinder 20 with a lower part of a plunger 60 being inserted while remaining its upper part so that the ball 71 is located within a guide groove 70 of the plunger 60. By further advancing the plunger 60 in the cylinder 20, the ball 71 is pressed downward by an upper wall surface 70c of the guide groove 70. By separating the ball 71 from the cylinder constituting member 73, the ball 71 is arranged between the guide groove 70 and the second longitudinal groove 31. <P>COPYRIGHT: (C)2010,JPO&INPIT |
