Anti-pinch safety method and system of elevator

Abstract

The invention discloses an anti-pinch safety method and system of an elevator. The anti-pinch safety method and system is characterized in that grooves penetrating door frames in the vertical direction are formed in the door frames of two bilaterally-opened elevator doors, a telescopic part is arranged in one groove, a part of the telescopic part protrudes out of the groove, and a contact type sensing screen is arranged at the bottom of the other groove. When the two elevator doors are closed, the two grooves are opposite in position, the protruded part of the telescopic part extends into the groove in the opposite elevator door, a certain gap is reserved between the telescopic part and the contact type sensing screen, and then a motor drives the telescopic part to continuously penetrate the groove in the opposite elevator door till the telescopic part is in contact with a limiting piece of the contact type sensing screen. If a linear object is still clamped after the two elevator doors are closed, the linear object can be pushed to be in contact with the contact type sensing screen by the telescopic part so long as the diameter of the linear object is larger than the thickness of the limiting piece, and an abnormal signal is sent to a door machine control system and the door machine control system correspondingly performs opening control treatment as long as the contact type sensing screen detects that the object is in contact with the screen.

Description

technical field [0001] The invention relates to an elevator anti-pinch safety method and system, belonging to the technical field of elevators. Background technique [0002] Generally speaking, the car door device of the elevator is equipped with a safety mechanism. When a passenger's body or other objects are caught in the car door, the safety mechanism will stop the door closing action and reverse the door opening action. At present, the commonly used method is to detect the motor speed and acceleration of the door operator. When the car door encounters an obstacle during door closing, the motor speed or acceleration will be affected, so that it can be judged whether there is a foreign object trapped. However, this method has a low recognition degree for soft linear foreign objects, such as dog chains and skipping ropes. [0003] For this reason, for example in the patent document of CN10164317A, disclose a kind of method that avoids strip objects such as dog chains to be...

AI Technical Summary

Problems solved by technology

The rope-shaped detection body in this way is easily hooked by passengers or objects entering and leaving, which not only affects the normal entry and exit, but also easily leads to a decrease in sensitivity or even failure if touched frequently

Occasionally, children may pull on the detection body, causing the elevator to not operate properly

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