| 摘要 |
PROBLEM TO BE SOLVED: To prevent a liquid excessively entering a liquid inflow portion due to a trigger rocking after a liquid ejection hole is shut from an injection cylinder hole by rotating a control cylinder to a shut-off position from being ejected by rotation of the control cylinder in the reverse direction to the above. SOLUTION: A fitting groove 14 is provided on a lower part of a front of a plunger 8, an arm 16 is made to protrude backward from a control cylinder 15 fitted to a nozzle cap 12, and a lock plate 19 is provided at a rear end of the arm. When the control cylinder 15 is rotated to a shut-off position between an injection cylinder hole 6a and a liquid ejection portion 11, an upper part of the lock plate is fitted into the fitting groove 14, and also a lower part of the lock plate becomes capable of engaging with a front end surface of a cylinder. In addition, by rotating the control cylinder 15 to a position where the hole 6a and the ejection portion 11 communicate with each other, the upper part of the lock plate disengages from the groove 14, and the lower part disengages from the front end surface under the cylinder, respectively, thereby allowing a trigger to be drawn backward. |
