摘要
介绍ＮＹＤ型接触式异型辊逆止器构造及工作原理，并着重对逆止器失效机制进行了分析，提出了防止逆止器失效的措施。
In this paper, the DYN-contact type reversion stopper of shaped roller is described with its construction and working principle, especially causes of malfunction of reversion stopper are emphatically analysed: Measures to prevent malfunction have been proposed.
