| 摘要 |
PURPOSE:To control a fill through weight to improve the accuracy of the fill by moving a valve body in the direction of closing a valve against the energizing force of a switching drive mechanism through a switching operation control mechanism, when the switching drive mechanism opens the valve body, to decrease the opening of the valve body. CONSTITUTION:When about 90% of the predetermined fill of a liquid is filled at the time of exciting the solenoid 31 of a switching drive mechanism 30 and lifting a valve body 23 to fill the liquid, air is supplied to an air cylinder 46 in the manner of corresponding to a signal from a weight detector. The piston rod 47 of the air cylinder 46 stretches so that a plate member 50 comes into contact with the top face of a weight 35 to push down the weight 35 by a predetermined quantity. Thus, the valve body 23 is also pushed down so that the opening of the valve body diminishes and the flow rate of the liquid flowing down from a nozzle 21 is reduced to a predetermined small quantity. Therefore, it is possible to decrease the opening of the valve body 23 by a switching operation control mechanism 40 just before filling is stopped so that the fill becomes accurate. |
