Protective device and method for preventing passenger from being jammed in elevator door

Abstract

The invention relates to a protective device and method for preventing a passenger from being jammed in an elevator door. The protective device for preventing the passenger from being jammed in the elevator door comprises an induction assembly and a controller, wherein the induction assembly is arranged on a border of the elevator door or a front supporting column of an elevator car, is in signalconnection with the controller, and comprises an infrared sensitive element and a Fresnel lens; and the Fresnel lens is arranged at an infrared signal receiving-transmitting port of the infrared sensitive element. The protective device for preventing the passenger from being jammed in the elevator door has the beneficial effects that the induction assembly and the controller are arranged; a humaninfrared signal detected by the infrared sensitive element is recorded through the controller, and then the elevator door is controlled to open or close; the problem that in the prior art, the function of an elevator door protective device easily fails at the last stroke of the closing of the elevator door or the function of a door protective device adopting an infrared electronic product easily fails in the induction blind area of the adopted infrared electronic product can be solved; and accordingly, the passenger can be prevented from being jammed in the elevator door or being injured in the jamming course.

Description

technical field [0001] The invention relates to the technical field of elevators, in particular to a protection device and method for preventing passengers from being pinched by elevator doors. Background technique [0002] Elevator is a means of transportation that people often use. How to ensure the safety of the elevator and ensure that the elevator does not accidentally pinch passengers is a major issue in the elevator field. [0003] At present, GB 7588-2003 "Safety Code for Elevator Manufacture and Installation" allows the function of the door protection device to be eliminated at the end of the door closing and become invalid. There are four types of door protection devices for common elevators: individual safety touch panel door protection, photoelectric protection + safety touch panel protection, light curtain protection + safety touch panel protection, and pure light curtain protection. , the micro switch protection signal of the safety touch panel needs to be shi...

AI Technical Summary

Problems solved by technology

There are four types of door protection devices for common elevators: individual safety touch panel door protection, photoelectric protection + safety touch panel protection, light curtain protection + safety touch panel protection, and pure light curtain protection. , the micro switch protection signal of the safety touch panel needs to be shielded, and its door protection function is invalid; the infrared electronic products used for photoelectric protection and light curtain protection have induction blind spots, such as the light curtain for blocking the diameter below φ50mm (GB 7588.1) Objects cannot be detected, so that at the end of the elevator door closing journey, or in the induction blind area of ​​the infrared electronic products used in photoelectric and light curtains, the function of the door protection device will fail, and passengers (or passengers' limbs) will be caught while the elevator is running with the door closed. risks of

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