| 摘要 |
While operating, a spring(90) pressing up the upper part of a main body(1a) is squeezed up and a gas inlet(61) of a cylinder(60) embraces a blank shot(10) at an insert hole(7') of a gas inlet(61) to a tight hold. Then, a percussion is performed so that a piston(50) is moved downward and shoot a chip(110). On the other hand, as the exhaustion of the gas after the explosion, the noise of the explosion is reduced by passing of an exhausting hole(70) thru a screw type gas path(72) of a noise reducing hole(73). And after the chip case is removed from the lower part of the main body(b) the next shot is automatically loaded.
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