| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a plunger, preventing a screw from falling off due to vibration of a carrying car. <P>SOLUTION: This fall-off prevention mechanism of a plunger screw is characterized in that in a plunger rod 1 having a screw part 2 at the tip 11, the tip of the plunger rod 1 is provided with a small projection 12 formed outside in the vicinity of the base end 21 of the screw part 2 and inclined in the direction opposite to the inclining direction of a thread 22 with respect to the longitudinal axis of the plunger rod 1. <P>COPYRIGHT: (C)2004,JPO&NCIPI |
