(1)緊急開(kāi)關(guān) (2)門艙開(kāi)關(guān) (3)大車的行程限位開(kāi)關(guān) (4)小車的行程限位開(kāi)關(guān) (5)起升機(jī)構(gòu)上升限位開(kāi)關(guān)