PURPOSE: To simplify the bullet advancing structure and to conveniently conduct machining and assembling operations by retreating a bullet advancing cylinder together with a slider, then exhausting the air out of a third air passage, returning forward together with the slider, and feeding next bullet to a bullet chamber. ;CONSTITUTION: If there is a first bullet 18a in a bullet chamber 42, when a trigger 6 is pulled, an air valve 11 is opened, the air is passed from a first air passage 15 to a second air passage 28, and fed to a first air chamber 40 via a fourth air passage. Thus, the bullet 18A is pressed into a gun tube 4 to be injected. In this manner, a bullet advancing cylinder 22 is pressed by a spring 23, advanced, the airs in the passages 15, 28 are introduced into the first air chamber 33, and the bullet advancing unit and the slider 3 including an annular tube 25 are returned together to the original position. At this time, the push rod 17 of the cylinder 22 thrusts second bullet 18B to introduce it into a bullet chamber 42 for waiting the injection for next pulling the trigger.;COPYRIGHT: (C)1997,JPO
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