Elevator system

Abstract

In order to reliably detect open-door travel at a shorter travel distance (at an earlier point in time), thereby enhancing safety, and maintaining operational efficiency, an elevator system equipped with an open-door travel prevention device, which assesses open-door travel and stops the car if the car moves up or down relative to the landing floor with the car doors and / or landing doors ajar, and is further provided with: a car door switch (43) that detects when car doors are ajar and a landing door switch (41) that detects when landing doors are ajar, a detection device (21) that detects the velocity and travel distance of the car, a position sensor (30) that detects the reference floor position at each storey, and a safety controller (1) that identifies an open-door travel irregularity on the basis of the results detected by the detection device (21) and the position sensor (30), using a car-speed irregularity identification threshold value that is assigned to the car position.

Description

technical field [0001] The present invention relates to an elevator system equipped with a car accidental movement protection device, and is especially suitable for a high-function elevator system equipped with a safety controller using a microcomputer. Background technique [0002] The elevator is obliged to install the car accidental movement protection device (UCMP: door open movement protection device). A safety device that automatically stops the elevator car when lifting before all the doors of the entrance and exit are closed. [0003] The car accidental movement protection device is composed of the elevator door openable area detection sensor, car door switch, hall door switch, etc. Or when it exceeds the openable area of ​​the elevator door, the car accidental movement protection device makes the brake act. [0004] As a prior art, for example, Patent Document 1 discloses a scheme for detecting unexpected movement of the car before the elevator car travels out of ...

AI Technical Summary

Problems solved by technology

[0008] In the prior art described above, since the specified distance for judging abnormality is set to a shorter distance in the openable area of ​​the elevator door, the possibility of false detection increases, especially when the hoist is caused by passengers getting on and off the elevator. When expansion and contraction occurs, it is easy to mistakenly detect the movement of the car at this time as an abnormality.

When a false detection occurs, the elevator car needs to be stopped urgently through the brake, which will cause the elevator to stop running and service, and reduce the elevator's operating efficiency

Especially in long-travel elevators, due to the long length of the sling, the sling tends to be in a spring-like state, and it is easy to expand and contract when passengers get on and off the elevator, which will lead to a significant drop in operating efficiency and make each floor docking heights are inconsistent

[0009] In addition, in the solution disclosed in Patent Document 1, since the elevator car needs to be re-aligned, the detection takes a long time, which may cause the elevator car to travel a longer distance with the elevator door open.

Also, when the car speed V1 is small, it is easy to mistakenly detect the car speed V2 as an abnormality, and when the car speed V1 is high, it is difficult to detect an abnormality.

In addition, the abnormal mode in which the elevator runs in the state of V2

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