Patent ID: 6564907
Filing Date: 2003-05-20
Classification: B66B

Abstract:
An elevator comprising:plural guide rails; a cage configured to ascend and descend along at least one of said guide rails in an elevator shaft; an emergency stop device configured to urgently stop said cage when said cage descend at an extraordinary speed, said emergency stop device including, an emergency stop mechanism provided at a lower end portion of said cage and configured to engage said at least one of said guide rails, thereby urgently stopping said cage, a link mechanism, provided at the lower end of said cage, coupled to said emergency stop mechanism and configured to actuate said emergency stop mechanism on receiving an external input; a limit switch including, a contact that normally projects from, and draws backs into a body when said emergency stop device operates, and a display mounted to said body and configured to illuminate during said emergency stop device operating; a speed detector configured to detect the descent of said cage at the extraordinary speed and correspondingly to apply said external input to said link mechanism; wherein said emergency stop device further comprises: the contact of said limit switch coupled to said link mechanism and said limit switch configured to detect the operation of said link mechanism for urgently stopping said cage, drive unit prohibiting means for prohibiting the operation of said drive unit in accordance with the result of detection by said limit switch, and operation prohibition canceling means for canceling the prohibition on the operation of said drive unit by said drive unit operation prohibiting means.