| 摘要 |
PURPOSE:To prevent an injection inoperative condition of ink, by interlinking with a pump operating lever up to recovery of inside pressure of a sub-tank, locking a capping-relief mechanism and later, by transmitting an electric current to piezoelectric elements and indicating the relieved condition by their vibrating noise. CONSTITUTION:For switching to an injection operative condition of ink is performed by pushing a swiching lever 17, capping a nozzle with a cap 13, locking with a lock-lever 26 and further, by continued pressing for starting a pump 9, causing recovery to operative condition of ink and air suction. At this moment, a switch 23 is placed in ''ON'' position. Then, at the end of recovery of the injection operation of ink, when said lever 17 is released, the locking condition by the lever 26 is attained again and by bringing the position of the switch 23 to ''OFF'' position, after the specified lapse of time, constant time piezoelectric elements are driven and at the same time, a solenoid 31 is excited. By excitation of the solenoid, even if the lever 26 is rotated in the clockwise direction, the lever 17 is kept in its condition by a spring 28 and relief of the capping is judged by vibrating worse of the piezo-elements, allowing lifting of the lever 17 hand. Thus, the injection inoperative condition of ink caused by inadvertent releasing of capping can be prevented. |
