| 摘要 |
A gas nailer is provided with a driving cylinder 7, a driving piston 10, a combustion chamber 8, a gas fuel cartridge 2, and a supercharging device 3. The driving piston 10 is operated in the driving cylinder 7 by a combustion pressure generated when a mixture of gas fuel and air is burned in the combustion chamber 8, and a driver hammers a fastener by an operation of the drivingpiston. A locking device 15 for locking the driving piston 10 is provided in the driving cylinder 7 so as not to move the driving piston 10 in accordance with a pressure increase in the combustion chamber 8 during a supercharging operation in which compressed air is supplied by the supercharging device 3.
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