抄録
This paper presents two types of resent occupational accident caused by damage of materials used in machinery. One case is that a hoist link chain used in a factory mainly recycling cathode-ray tubes failed during the cleaning process of cullet. Consequently, the worker working this process was burnt with the high-temperature cleaning solvent since the load fell in the cleaning tank. In this case, link chains were subjected to over load repeatedly due to removing the coil spring above the hock. The other case is that the molten metal leaked from the die of a centrifugal casting machine due to failure of screw threads cramping the upper die with the inner die . Four workers fell sacrifices to this accident.
