| 摘要 |
In a hand hoist in which a driven member 15 and a biasing drive member 16 are threaded onto a driving shaft 11, an overload avoiding arrangement for the hoist, which is so arranged that a manually rotated member 21 is supported by a support frictional surface 16d of the biasing drive member 16 and a frusto-conical frictional surface 22b of a frusto-conical friction member 22, while the frusto-conical friction member 22 unrotatably supported on the biasing drive member 16 so as to be displaceable in an axial direction, is depressed in the direction of the support frictional surface of the biasing drive member 16, by an adjustable nut 26 of the outer end of a boss 16a of the biasing drive member 16 and a belleville spring 23.
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