Elevator landing door pit unlocking mechanism

Abstract

The invention discloses an elevator landing door pit unlocking mechanism. According to the elevator landing door pit unlocking mechanism, a top plate penetrates through a lower horizontal plane and anupper horizontal plane of a support and a guide hole of a horizontal bending surface of a door head body to move up and down along the guide hole; a support shaft is vertically fixed on the verticalsurface of the support; a sliding bearing sleeves the support shaft and positioned between the top plate and the vertical surface of the support; a transmission rod is fixed on the top plate and positioned between the sliding bearing and the upper horizontal plane of the support; one end of a pit unlocking rope is fixed on the transmission rod, passes around the sliding bearing door closing side and then runs along the horizontal bending surface of the door head body towards the sliding bearing door opening side; in a natural state, a gap is formed between the lower end of the top plate and ahead of a lock hook body; and when the top plate is pulled by the pit unlocking rope to move downwards, the lower end of the top plate can press down the head of the lock hook body to enable the lockhook body to rotate around a lock hook rotating shaft to open a door lock of a landing door. The elevator landing door pit unlocking mechanism can be suitable for simultaneously arranging pit climbingladders on the left side and the right side of the landing door, and is simple in structure so that the elevator landing door can be convenient to unlock in a pit.

Description

technical field [0001] The invention relates to an elevator hall door device, in particular to an elevator hall door bottom pit unlocking mechanism. Background technique [0002] The draft of the new national standard 7588.1 "Safety Code for Elevator Manufacturing and Installation" stipulates that if there is no door entering the pit passage, but through the landing door, a pit ladder should be installed, and the pit ladder can be set on both sides of the landing door. And within the range of 1.80m in height and the maximum horizontal distance of 0.80m, the door lock should be safely accessible, or the personnel in the pit can open the landing door through a permanently installed device. [0003] At present, the pit unlocking mechanism of the upper floor door system in the elevator market is generally used as follows: figure 1 In the structure shown, the lower end of the pit unlocking rope 96 is locked with the bottom bending edge of the landing door by bolts, the upper end...

AI Technical Summary

Problems solved by technology

This pit unlocking method limits the arrangement of the pit ladder in the pit, and the ladder of the pit unlocking rope mechanism must be installed on the wall directly below the sill of the entrance and exit floor to ensure that the installation or maintenance personnel can Hands safely touched the bottom pit unlocking rope 96, and the location of the bottom pit ladder did not meet the ladder layout regulations in the new national standard 7588.1 submission draft "Safety Code for Elevator Manufacturing and Installation"

If the ladder is set on both sides of the entrance and exit, it is not conducive to unlocking the pit, opening the landing door, or even improper operation, which may cause injury to the operator

Images