Elevator system

Abstract

The invention discloses an elevator system which is provided with a lift car accidental movement protecting device. When the elevator lift car starts to goes up or down from a floorslab of an elevator lobby on the condition that a lift car door and a landing door are open, the lift car accidental movement protecting device judges that the lift car moves accidentally and abnormally and stops the lift car. The elevator system comprises a lift car door switch (43) for detecting the open state of the lift car door, a landing door switch (41) for detecting the open state of the landing door, a detecting device (21) for detecting the speed and amount of movement of the lift car, a position sensor (30) for detecting the floor reference position of each floor, and a security controller (1) for judging lift car sudden movement abnormity according to the detecting results of the detecting device (21) and the position sensor (30) and an abnormity judgment threshold value which is set according to the lift car position and used for judging speed abnormity of the lift car. Therefore, the lift car accidental movement is practically detected within a shorter movement distance (as early as possible), and the reduction of the operating efficiency of the elevator is prevented while the security is improved.

Description

[0001] This application is a divisional application of an invention patent application with an application date of June 18, 2010, an application number of 201080067507.9, and an invention title of "elevator system". technical field [0002] 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 [0003] 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. [0004] 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 a...

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

Images