Controller for elevator

Abstract

The present invention provides a controller for an elevator that enables a place with abnormal landing precision to be identified at a glance during elevator inspection, without having to add special devices.In a controller for an elevator that has a position detection sensor 80 attached to an elevator car 1 and to-be-detected objects 81 to 83 that are placed in a hoistway and are detected by the position detection sensor, the controller detectingthe position of the elevator car, the position detection sensor has four sensor units 80A to 80D15 attached to the elevator car side by side; each of the to-be-detected objects has a plurality of to-be detected units 81a to 81d, 82a and 82d, or 83a to 83d, which are detected at the same time by at least two sensor units of the four sensor units arranged20 side by side underneath the elevator car; an abnormality is detected in response to a difference between output timings of the at least two sensor units.

Description

technical field [0001] The present invention relates to an elevator in which the elevator car is lifted and lowered in the hoistway, in particular to an elevator that can accurately grasp the location where the landing accuracy of the floor is abnormal when the elevator car is about to stop at a predetermined landing floor Control devices for elevators. Background technique [0002] In the prior art, when the elevator moves up and down in the elevator passage, it is necessary to detect the position of the elevator car in the elevator passage. In addition, in order to prevent cost increase and reliability decrease, and in order to improve floor landing accuracy, for example, using a plurality of position detection sensors installed on the side of the elevator car and a plurality of objects to be detected installed on the side of the elevator hall, in the elevator car When the position reaches the lifting position where the elevator door can be opened, the elevator door opena...

AI Technical Summary

Problems solved by technology

[0008] The prior art disclosed in Patent Document 1 is an abnormality judgment method that can only be applied to the car detection switch arranged at a position where the normal operation range can be set, and it cannot judge whether there are multiple positions installed in the hoistway. Is there any abnormality in the car detection switch

[0009] In addition, when it is desired to expand the application range of this method to judge the abnormality of multiple car detection switches, not only will the system structure become complicated, but also the labor required for maintenance work will increase.

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