| 摘要 |
PROBLEM TO BE SOLVED: To provide a driving machine that enables an operator to properly operate a trigger even under an environment where dust and the like are generated.SOLUTION: Compressed air of a valve piston lower chamber 21D leaks downward through a gap between an inner face of a pilot valve body lower through hole 21C and a pilot valve plunger 22. Thus, the pressure of a space, where the valve piston lower chamber 21D and a valve spring 24 inside a valve piston 23 are provided, is reduced. At this time, compressed air of the space, where the valve piston lower chamber 21D and the valve spring 24 inside the valve piston 23 are provided, not only flows through the gap between the inner face of the pilot valve body lower through hole 21C and the pilot valve plunger 22 but also flows upward through a communication port 21E. The discharged compressed air is jetted around the trigger 15.SELECTED DRAWING: Figure 7 |
