| 摘要 |
PROBLEM TO BE SOLVED: To provide an impact wrench and manifold for high pressure equipment having a switchable pressure regulating mechanism capable of supplying an air pressure state for enabling a torque control, while fastening a wheel nut with excellent work efficiency in fastening work, and supplying also an air pressure state to obtain power for enabling sure removal of the wheel nut in loosening work. SOLUTION: This automatic pressure reducing air supply valve 20 is provided with an automatic valve 27 for changing pressure of fluid supplied from the outside by energizing force, primary pressure chamber 25 and secondary pressure chamber 29 provided on front and rear sides of the automatic valve 27, a pressure regulating chamber 32 provided on an outer periphery of the automatic valve 27 and a switching valve 21 capable of switching the secondary pressure chamber 29 to a pressure limit state or a pressure no-limit state. During the pressure limit state, the pressure regulating chamber 32 is communicated with the outside via the switching valve 21. During the pressure no-limit state, the pressure regulating chamber 32 is communicated with the secondary pressure chamber 29 via the switching valve 21. COPYRIGHT: (C)2009,JPO&INPIT
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