| 摘要 |
A tightening screw in which a rotating ring is rotatably held on a flange-ring, a screw member having female threads in the same pitch as the male threads of the bolt to be fitted, with the female thread diameter formed larger than the male thread diameter, is rotably held eccentrically so that some of female threads of the screw member may be engaged with the male threads preliminarily, and the flange is fixed at the time of tightening so that the rotating ring may revolve the screw member, and thereby the decelerated rotation created in the screw member produces a large tightening force to increase the torque.
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