ROTARY COMPRESSOR

PROBLEM TO BE SOLVED: To prevent the mistlike lubricating oil from being mixed with an inlet gas and brought out of a compressor through a cylinder chamber by attaching a weir part protruding to the back surface side of a frame on the circumferential part of the frame on the blade moving space side of a cylinder. SOLUTION: When a drive shaft 6 is rotated, a piston 15a revolves along the inner wall of a cylinder chamber 4 so as to rock with the rotating center position 18 of a guide 17 as the fulcrum through a blade 15b, compresses a coolant gas sucked through an inlet port 3, and discharges it through a discharge port 14. The lubricating oil sucked into the cylinder chamber 4 flows into a blade moving space 33 where the tip of the blade 15b is rocked. In this case, a weir part 40 protruding upward is attached to the blade moving space 33 side in the back surface part of a frame 19 for blocking the opening of the cylinder chamber 4. According to this, the dropping of the lubricating oil from the blade moving space 33 side is prevented, and the dropped lubricating oil is prevented from flowing out with the coolant gas.