PURPOSE: To prevent an adverse influence by sticking of a foreign matter in a compressed air supply device.
CONSTITUTION: A compressed air supply device 7 is provided with a fixed delivery type compressor 11, an aftercooler 14 interposed in a supply passage 13 and a refrigerating type drier 15 interposed in the supply passage 13. The aftercooler 14 is composed of a heat exchanger 14-1 and a fan device 14-2. The refrigerating type drier 15 is composed of a heat exchanger 15-1 and a fan device 15-2. A pair of blow nozzles 16 and 17 are arranged on the side of fan device 14-2, and a pair of blow nozzles 18 and 19 are arranged on the side of the fan device 15-2. The blow nozzles 16 to 19 are connected to the supply passage 13 downstream of the refrigerating type drier 15 through a solenoid opening-closing valve 20.
HOSHINO TATSUYUKI
HIROSE TATSUYA
