| 摘要 |
PROBLEM TO BE SOLVED: To solve problems that a one-way clutch mounted on a shaft as a power transmission shaft needs a large dimension, which increases the cost and a mounting space, that is, a fluid machinery is enlarged, and further in a case when a cam mechanism is mounted between a scroll member and a shaft, a mechanism is complicated, which also increases the cost, enlarges the mechanism, and lowers the reliability. SOLUTION: This scroll fluid machinery using a pin crank mechanism is provided with a centrifugal reverse rotation preventing mechanism mounted on a shaft and formed by mounting a one-way clutch on a pin crank shaft thinner than a diameter of the shaft, or mounting a claw part 58a and a balancer part 58b oppositely to each other, accommodating a movable annular body 58 and a spring for pressing the movable body in a frame body fixed to the shaft, and accommodating the frame body in a case having a stopper groove.
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