Safety device for elevator

Abstract

The invention provides a safety device for elevator, which is not subject to influence of status of the floor at the doorway when foreign matter is detected, and is capable of surely detect foreign matter even if the foreign matter in the shape of a rope is in contact with the elevator door along the end surface of the elevator door. The safety device for elevator comprises an image recognition unit disposed on the upper portion of the elevator doorway and used for capturing the image of the vicinity of the doorway; a foreign matter detection image processing unit, which determines whether foreign matter exists according to the image information obtained by the image recognition unit; an elevator door control unit, which controls the opening and closing movement of the elevator door; and an elevator door driving unit, which drives the elevator door. In the safety device for the elevator, the moving unit (e. g., elevator door) tries to move the foreign matter, thereby the foreign matter is identified and / or existence of foreign matter is determined, wherein the identification determines that whether the detected foreign matter is real or the detection is false, and the determination of the existence of foreign matter determines whether rope-shaped foreign matter exists along the end surface of the elevator door.

Description

technical field [0001] The invention relates to a safety device for an elevator, which is used to detect foreign objects near the entrance and exit of the elevator, so as to prevent accidents before they happen. Background technique [0002] As a safety device for detecting foreign objects near the elevator entrance to prevent collision and being caught by the elevator door, for example, a safety device has been proposed which includes light emitting parts vertically arranged on the elevator door at predetermined intervals, and The light-receiving unit provided at a position opposite to the light-emitting unit keeps the elevator door open when the light is blocked, or stops the closing operation and opens the elevator door again if the elevator door is being closed. The safety device with the above structure can effectively react when a passenger runs into the elevator when the elevator door is closing, or when the elevator takes too long to get on the elevator by pushing th...

AI Technical Summary

Problems solved by technology

[0005] However, in the prior art described above, when the paint or stickers of the foreign matter detection marks provided on the surface of the door sill are scratched by the wheels of the carts used when transporting luggage, or the surface of the door sill is damaged or stained due to long-term use, When it is dirty, or if there is a line-like pattern on the floor, the detector may misjudge the above as a foreign object

As a result, the elevator door may be kept open unnecessarily, which may lead to a decrease in operating efficiency.

[0006] In addition, when the rope-shaped foreign object is in contact with the elevator door along the end surface of the elevator door, it is difficult to distinguish between the end surface of the elevator door and the rope-shaped foreign object, so that the elevator may be in a state where the foreign object is caught because the foreign object cannot be detected. continue to run

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