| 摘要 |
PROBLEM TO BE SOLVED: To improve combustion efficiency by preventing the stagnation of air flow by forcedly diffusing the flow of mixture gas by a fan. SOLUTION: In a gas internal combustion type nailing machine, an annular space portion S is formed between a movable housing 31 and a sleeve 33 by fixing the cylindrical sleeve 33 between the movable housing 31 and the fan, and also communicating holes 33a, 33b communicating with the annular space portion S are formed on the sleeve 33 at the upper portion and the lower portion than the fan 7 respectively. As a result, the mixture gas blown by the fan is returned to a combustion chamber 3 via the upper communicating hole 33a from the annular space passing the lower communicating hole 33b. COPYRIGHT: (C)2009,JPO&INPIT
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