| 摘要 |
<p>PURPOSE:To more simply and inexpensively detect the clogging of a liquid flow passage, by comparing the operating time of a shift plate with a normal shift operating time when abnormality is generated in said operating time. CONSTITUTION:A predetermined electric signal is transmitted as a pulse from a controller (G-line) to open and close a solenoid type air valve 35 and the operating air from the valve 35 is introduced into an automatic emitting gun 23 to operate a piston 24. The time of the pulse is calculated back on the basis of the pulse on the G-line to set a normal shift time. Next, this time is stored in and set to a controller 31 as a master time. When abnormality such as clogging is not generated in the emitting flow passage in the automatic emitting gun 23, intermittent emission is repeated and, when the clogging is generated, the liquid pressure difference before and after a shift plate 3 becomes small and the operating time of the shift plate 3 thereby is compared with the master time in the controller 31. When there is abnormality, an alarm is transmitted as an abnormality signal from the controller 31.</p> |
