| 摘要 |
A clamping screw (10) is provided with a threaded member (11) forming an attachment thread which screws together with the thread for attachment, an operating ring (12) supported on the outer surface of the outer end of said threaded member so as to freely rotate only and to which rotational force is input, a flange ring (18) inserted over the inner end of said threaded member, and having a flange surface which abuts the object to be attached on the clamping side from the inner end of said threaded member, and a torque-increasing mechanism (power structure) on the outer surface of said threaded member between said operating ring (12) and said flange ring (18) and which increases the torque of the rotational force of the operating ring transmitting this to the flange ring (18), said torque-increasing mechanism being comprised with an inclined cam surface (27) which applies an effective force in the direction of clamping to elements in contact through the rotation of said operating ring.
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