| 摘要 |
The invention relates to a manual chain block having a hand wheel (8) and a brake ratchet wheel (24), one of which is provided with a cover portion (15;30) extending toward the other thereof and having a circular peripheral surface (30a) which covers the lining plate, and the other of the hand wheel and the brake ratchet wheel is provided with a circular opposite peripheral surface (30b) opposed to the circular peripheral surface, so that the opposite peripheral surfaces of those circular peripheral surface can be arranged adjacently to each other or have a sealing member (50:52) interposed therebetween. Therefore, even when dust and rainwater enter a wheel cover for a hand wheel, this dust and rainwater can be prevented from further entering the mechanical brake. <IMAGE> |
