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    • 7. 发明专利
    • Gas internal combustion nailing machine
    • JP5344066B2
    • 2013-11-20
    • JP2012115256
    • 2012-05-21
    • マックス株式会社
    • 宏司 田中
    • B25C1/08B25C7/00
    • PROBLEM TO BE SOLVED: To provide a gas internal combustion type nailing machine the safety of which is secured by preventing or suppressing the production of excessive energy when supercharged pressure exceeds a preset pressure value. SOLUTION: The gas internal combustion type nailing machine includes: a hammering cylinder for housing a hammering piston; a combustion chamber which is arranged to be opened and closed by the vertical movement of a cylindrical movable housing above the hammering cylinder; a fuel feeder 19 for feeding fuel gas into the combustion chamber through a fuel feed tube 27; and a control valve 41 arranged in the middle of the fuel feed tube 27 where ignition and combustion are performed by mixing the fuel gas with air. When pressure in the combustion chamber is equal to or lower than the preset pressure value, a valve body 43 of the control valve 41 is pressed by a pressing member 45 to open the fuel feed tube 27. When the pressure in the combustion chamber is increased and exceeds the preset pressure value, the valve body 43 of the control valve 41 is moved by air pressure against the pressing force of the pressing member 45 to cut off the fuel feed tube 27 and stop the feed of the fuel by the fuel feeder 19. COPYRIGHT: (C)2013,JPO&INPIT