Self-rescue device special for elevator pit maintenance

• Main Authors: CAO FENGGUANG, HUANG YIMAO, LI CHENGXIANG, TAN ZHENGRONG
• Format: Patent
• Language: Chinese; English
• Published: 17.03.2020
• Subjects: ELEVATORS; ESCALATORS OR MOVING WALKWAYS; HAULING; HOISTING; LIFTING; PERFORMING OPERATIONS; TRANSPORTING

The utility model provides a special self-rescue device for elevator pit maintenance, which comprises a landing door unlocking device and an unlocking retaining device, the landing door unlocking device comprises a pusher dog and a long crank, and the middle part of the pusher dog is arranged on a triangular key lock and rotates synchronously with the triangular key lock; the long crank comprisesa vertical part and a bent part, the first end of the vertical part is located on the lower portion of the landing door and perpendicularly connected with the bent part, the second end of the verticalpart is hinged to the first end of the pusher dog, and the vertical part moves up and down to drive the pusher dog to rotate with the triangular key lock as the circle center; the second end of the pusher dog is located below the landing door lock hook and used for jacking the landing door lock hook upwards; when the bent part moves downwards and is inserted into the unlocking keeping device, theunlocking keeping device c