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JDF-2型井字架吊篮防坠器是浙江省永嘉县清水埠虹光机电厂引进杨益文同志申请的专利(申请号:87211673)而试制成功的。该防坠器根据失重原理.由导向轮、锯齿偏心夹紧轮等结构组成。安装在井字架吊
JDF-2-type well frame cradle anti-dropping device is Yongjia County, Zhejiang Province Yongshou Avision Power Plant introduced Comrade Yang Yiwen application (application number: 87211673) and successful trial. The anti-dropping device according to the principle of weight loss by the guide wheel, serrated eccentric clamping wheel and other structures. Mounted on the Tic Tac Toe