Abstract: A socket portion (11) capable of mounting either of a high pressure exclusive plug and a normal pressure exclusive plug is formed at one end of a coupler (6). In the coupler (6), an opening/closing valve (18) for opening and closing a flow path of a compressed air is provided, and a pressure reducing valve for reducing an air pressure to a predetermined pressure value proximate to substantially an upper limit value of an operating pressure region of a normal pressure tool by controlling the opening/closing valve (18) is formed. Thereby, when the normal pressure exclusive plug (P1) is mounted, air the pressure of which is reduced by the pressure reducing valve is supplied to the normal pressure exclusive plug (P1).

Abstract: The invention provides an apparatus for outputting compressed air in a compressor to a plurality of pneumatic tools at a plurality of pressures. The apparatus includes: an air tank storing compressed air compressed by the compressor at a high pressure; a pressure adjusting portion connected to said air tank and adjusting a pressure value of the compressed air in a region from the high pressure to zero; a pressure outputting portion connected to a secondary side of said pressure adjusting portion and outputting the adjusted compressed air to at least one of a first pneumatic tool driven at a first pressure and a second pneumatic tool driven at a second pressure. The first pressure is larger than the second pressure, and the adjusted compressed air is not output to the second pneumatic tool at the first pressure.

Abstract: A socket portion (11) capable of mounting either of a high pressure exclusive plug and a normal pressure exclusive plug is formed at one end of a coupler (6). In the coupler (6), an opening/closing valve (18) for opening and closing a flow path of a compressed air is provided, and a pressure reducing valve for reducing an air pressure to a predetermined pressure value proximate to substantially an upper limit value of an operating pressure region of a normal pressure tool by controlling the opening/closing valve (18) is formed. Thereby, when the normal pressure exclusive plug (P1) is mounted, air the pressure of which is reduced by the pressure reducing valve is supplied to the normal pressure exclusive plug (P1).

Abstract: The invention provides an apparatus for outputting compressed air in a compressor to a plurality of pneumatic tools at a plurality of pressures. The apparatus includes: an air tank storing compressed air compressed by the compressor at a high pressure; a pressure adjusting portion connected to said air tank and adjusting a pressure value of the compressed air in a region from the high pressure to zero; a pressure outputting portion connected to a secondary side of said pressure adjusting portion and outputting the adjusted compressed air to at least one of a first pneumatic tool driven at a first pressure and a second pneumatic tool driven at a second pressure. The first pressure is larger than the second pressure, and the adjusted compressed air is not output to the second pneumatic tool at the first pressure.

Abstract: A screw driving and turning machine comprises: a body having a nose portion; a driving cylinder received in the body; a screw driving mechanism having a driving piston having a driving and turning bit slidably accommodated in the driving cylinder, wherein compressed air is fed into the driving cylinder to drive the driving piston, and a screw held in the nose portion of the body is driven to a state in which a head portion of the screw is raised; a screw turning mechanism having an air motor driven by a portion of compressed air fed to the driving cylinder, for turning the screw, which has been driven by the driving piston; a stop valve for opening and closing an air passage between the driving cylinder and the air motor, arranged in the middle of the air passage; and a contact arm slidably arranged along the nose portion, for operating the stop valve by being pushed to the body in accordance with pressing an end of the contact arm against a material into which the screw is driven, wherein the feed of compres