本机适用于检验成品鞋和鞋底(片)的常温耐折性能。其原理是将成鞋或鞋底安装在耐折试验机上，以一定角度一定频率进行曲挠试验，测量鞋底和围条在一定曲挠次数后的裂纹(口)和开胶长度，并观察鞋帮的变化。 This tester is used to determine the flexing durability for whole shoe or shoe sloe at room temperature. Flex the specimen under a specified angle and frequency to assess its cracking degree and observe the change of its upper.