| 摘要 |
<P>PROBLEM TO BE SOLVED: To perform suction under high suction pressure immediately after suction ON operation by simple operation. <P>SOLUTION: The connection port 45 communicating with a negative pressure source passage 21 is provided in the inner wall of the pipeline of a valve guide member 24 and a plunger 25 for opening and closing the connection port 45 is provided in the valve guide member 24. An air passage 49 connecting the air opening 47 opened at the position opposed to a cap 26 and the passage opening 48 opened in a negative pressure source passage 21, is provided in the valve guide member 24. The pressure operation part 74 positioned above the air opening 47 on a lid part 62 and the inclined surface 75 opposed to the air opening 47 of the skirt part 63 thereof are formed at the cap 26. Before suction ON, the pressure operation part 74 is operated under pressure to close the air opening 47 by the inclined surface 75. Since the pump pressure of a suction pump 20 can be preliminarily set high only by the simple pressure operation of the pressure operation part 74, suction can be started under high suction pressure immediately after suction ON operation. <P>COPYRIGHT: (C)2012,JPO&INPIT |
