Missing step detection and non-manipulated reversal detection device for passenger conveying device

Abstract

The invention discloses a step deficiency detection and non-manipulated inversion detection device for a passenger conveying device. The step deficiency detection and non-manipulated inversion detection device comprises a control device, a first sensor and a second sensor, wherein the control device is fixedly arranged at one end of a truss of the passenger conveying device; the first sensor and the second sensor are arranged in a driving station or a steering station; at least one of the two sensors is positioned at the overturning and bending segment of the passenger conveying device; the two sensors are connected with the control device through signal lines respectively; the two sensors are used for detecting whether detected portions exist in detection regions thereof or not; when detected portions of steps move into the detection regions of the two sensors, the sensors output first signals; when the detected portions of the steps move out of the detection regions of the two sensors, the sensors output second signals. The detection device is simple in structure, and convenient to use, and can be used for detecting sensor faults; moreover, additional reliable non-manipulated inversion detection and protection can be provided when a driving chain is broken or displaced.

Description

technical field [0001] The invention relates to a detection device of a passenger conveying device, in particular to a detection device for missing steps and non-manipulating reversal of a passenger conveying device. Background technique [0002] The steps of the passenger conveyor are connected in a loop and move in a circle to transport passengers. Unwary occupants may fall into the mechanism and be seriously injured if: [0003] 1) After long-term operation, the parts that fix the steps are loose, causing the steps to break free from the step chain and fall into the inside of the truss; [0004] 2) One or more steps were removed during the inspection by maintenance workers and were not properly restored at the end of the inspection. [0005] Therefore, more and more attention has been paid to the reliability and safety of step missing detection of passenger conveying devices. In many years of practice, a variety of methods and devices for detecting missing steps have b...

AI Technical Summary

Problems solved by technology

[0003] 1) After long-term operation, the parts that fix the steps are loose, causing the steps to break free from the step chain and fall into the inside of the truss;

[0004] 2) One or more rungs were removed during the overhaul by maintenance workers and were not properly restored at the end of the overhaul

However, when the sensor fails and continues to output the "detection step" state, the safety function will fail, making the passenger conveying device break away from the protection of the safety function;

[0007] China Patent No. 201020575087.2 is a device that compares the pulse of the step sensor with the expected frequency / period, which can detect the fault of missing steps in a stable operating state, but with the development of technology and the enhancement of energy conservation awareness, frequency conversion escalators Generally, it cannot be protected by this method during start-up and energy-saving low-speed operation (usually 20-30% of the rated speed), which will cause the safety function to enter the blind zone for a period of time, and there are certain potential safety hazards

However, since the gear box is connected to the large sprocket that actually drives the step chain through the drive chain, when the drive chain breaks or is abnormally displaced, the sensor installed on the motor / gear box shaft cannot accurately detect the actual running direction of the steps. As a result, the safety function falls into a blind spot under the above circumstances, and the protection effect is not good

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