| 摘要 |
The chain block includes a holding frame having bearings to support intermediate gear of reduction gears mechanisms mounted on one of a pair of side plates. The frame is formed into a channel shape so as to cover the reduction gear mechanisms and is positioned by the projections at the ends of both legs of the holding frame being brought into engagement with the engagement holes in the side plate and fixed to the side plate by being pressed against the side plate by a gear cover mounted on the side plate so as to maintain a stable rotation of the intermediate gears. A brake cover and a hand sprocket cover mounted on the other of the pair of side plates are constructed so as to be simultaneously fastened to the other side plate and include engagement means by which both covers are brought into engagement with each other by the simultaneous fastening. |
