| 摘要 |
This key comprises a pair of elongated blocks each having a tapered recess; a tapered pin adapted to be inserted in a tubular tapered portion which is formed by bringing the pair of blocks together in such a manner that the tapered recesses confront, and mutually displaceable in the axial direction; and a clamping member adapted to be screwed into a threaded portion provided on one end of the tapered pin or the tubular tapered portion. The key obtained by assembling these parts can be fitted into a key groove provided between a driving member and a driven member. The clamping member is rotated to mutually displace the tapered pin with respect to the tubular tapered portion in the axial direction, thereby separating the blocks from each other, thus pressing the outer walls of the blocks against the inner wall of the key groove. As a result, the key is firmly fitted into the key groove, and the drive member and the driven member can be securely coupled together with a higher reliability.
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