Automatic pedestrian walkway tread missing detection and static electricity removal device

Abstract

This invention discloses a device for detecting missing pedals and removing static electricity from moving walkways, comprising a first conductive brush assembly, a second conductive brush assembly, and a control device. The first and second conductive brush assemblies are installed at preset intervals along the pedal's running direction at the drive end or turning end of the moving walkway. The first and second conductive brush assemblies are connected to the control device via cables, forming a circuit. When a pedal passes over the first and second conductive brush assemblies, it comes into contact with them. The control device determines whether a pedal is missing by detecting the continuity of the circuit. This invention has a simple structure, requires no expensive sensors, is low-cost, and has a simple detection principle, achieving the dual functions of detecting missing pedals and removing static electricity from the pedals.

Description

Technical Field

[0001] This invention relates to the field of automatic walkway technology, specifically to a device for detecting missing treads and removing static electricity from automatic walkways. Background Technology

[0002] Moving walkways are widely used in various public places, such as large supermarkets. The steps of moving walkways are connected to the step chain via fixed blocks. During use, alternating loads are generated due to passenger stepping and turning, creating a risk of loosening or even detachment of the fixed components, causing the steps to become unsecured and detach from the step chain. Due to the structure of the moving walkway itself, a detached step will not fall off in the straight section of the working area or return section, but it may fall off at the turning end due to the drastic change in the movement trajectory. If a passenger is passing by at this time, their foot could easily fall into the moving walkway, causing injury or death. Various methods and devices exist in the industry for detecting missing steps, but they still have some drawbacks:

[0003] Patent document CN15818407A provides a passenger protection device for missing pedals. It detects missing pedals through two sets of sensors and sets up a synchronous conveyor device as a platform to provide standing support for passengers, which meets the national standard requirements for stopping distance. However, the detection method in this solution relies on the reliability of the sensors, and the installation structure of the support platform is extremely complex, which is not applicable to conventional moving walkways.

[0004] Patent document CN109399435A provides a solution for supporting and guiding a fallen pedal to prevent the pedal from becoming empty. However, this solution is only set at the flipping part and cannot detect the fault state of the pedal being loose, so it cannot completely eliminate the risk.

[0005] Patent document CN103879874B provides a scheme for detecting missing steps. It determines whether there are empty steps by comparing the signals generated by two sets of sensors. However, this scheme has high requirements for the sensors, usually photoelectric or magnetic proximity sensors. These sensors have high requirements for the operating environment and are prone to malfunction or failure.

[0006] Among the above technical solutions, the pedal missing detection device has a complex structure, high requirements for sensors, and many drawbacks. Summary of the Invention

[0007] To solve the above-mentioned technical problems, the present invention provides a device for detecting missing treads and removing static electricity in automatic walkways, comprising a first conductive brush assembly, a second conductive brush assembly, and a control device;

[0008] The first conductive brush assembly and the second conductive brush assembly are installed at a preset interval along the running direction of the pedal at the drive end or steering end of the automatic walkway.

[0009] The first conductive brush assembly and the second conductive brush assembly are connected to the control device via a cable to form a circuit; when the pedal passes over the first conductive brush assembly and the second conductive brush assembly, it comes into contact with the first conductive brush assembly and the second conductive brush assembly.

[0010] The control device determines whether the pedal is missing by detecting the continuity of the circuit.

[0011] Preferably, the first conductive brush assembly and the second conductive brush assembly are mounted on the curved section where the pedal flips.

[0012] Preferably, the preset interval is half the depth of a pedal.

[0013] Preferably, the control device determines that the pedal is missing when it detects that the circuit is disconnected for more than a preset time.

[0014] Preferably, the first conductive brush assembly and the second conductive brush assembly are installed at a preset interval on the protective baffle at the drive end or steering end of the moving walkway along the running direction of the pedal.

[0015] Preferably, when the control device determines that a pedal is missing, it sends a braking command to the moving walkway.

[0016] Compared with the prior art, the beneficial technical effects achieved by the present invention are as follows:

[0017] First, the detection device in this invention has a simple structure and does not require a highly accurate sensor;

[0018] Secondly, the detection logic of the detection device in this invention is simple and clear, and its reliability is higher.

[0019] Third, the conductive device in this invention also has the function of removing residual static electricity from the pedal. Attached Figure Description

[0020] The accompanying drawings are intended to illustrate the general characteristics of the methods, structures, and / or materials used in specific exemplary embodiments of the invention, supplementing the description in the specification. However, the drawings are schematic diagrams not drawn to scale and may not accurately reflect the precise structural or performance characteristics of any of the given embodiments. The drawings should not be construed as limiting or restricting the range of numerical values ​​or properties covered by exemplary embodiments of the invention. The invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0021] Figure 1 This is a schematic diagram of the overall structure of the automatic walkway tread missing detection and static electricity removal device in Example 1.

[0022] Figure 2 This is a schematic diagram of the current waveform of the circuit in the moving walkway of Example 1 when no pedal is missing during operation;

[0023] Figure 3 This is a schematic diagram of the detection of missing pedals and the detection of missing pedals by the antistatic device of the automatic walkway in Example 1.

[0024] Figure 4 This is a schematic diagram of the current waveform of the circuit when a pedal is missing during the operation of the automatic walkway in Example 1. Detailed Implementation

[0025] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can fully understand other advantages and technical effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through different specific embodiments, and the details in this specification can also be applied based on different viewpoints, with various modifications or changes made without departing from the overall design concept of the invention. It should be noted that, unless otherwise specified, the following embodiments and features can be combined with each other. The following exemplary embodiments of the present invention can be implemented in many different forms and should not be construed as being limited to the specific embodiments set forth herein. It should be understood that these embodiments are provided to make the disclosure of the present invention thorough and complete, and to fully convey the technical solutions of these exemplary embodiments to those skilled in the art.

[0026] Example 1

[0027] like Figures 1 to 4 This illustration shows a preferred embodiment of a tread missing detection and static electricity removal device for an automated walkway, comprising a first conductive brush assembly 01, a second conductive brush assembly 02, and a control device 03. The first conductive brush assembly 01 and the second conductive brush assembly 02 are installed at preset intervals along the tread running direction on a protective baffle 04 at the drive end or turning end of the automated walkway. Multiple treads 11a to 11f are continuously connected in a ring within the automated walkway and move cyclically, potentially upwards or downwards.

[0028] like Figure 1 As shown, when no pedal is missing, the first conductive brush assembly 01 and the second conductive brush assembly 02 are in contact with one or both pedals 11a to 11f, forming a smooth circuit with the control device 03, thus generating the following: Figure 2 The current waveform diagram is shown.

[0029] like Figure 3As shown, when a pedal is missing, one or both of the first conductive brush assembly 01 and the second conductive brush assembly 02 will not be in contact with any of the pedals 11a to 11f, and will be unable to form a smooth circuit with the control device 03, i.e., the following occurs: Figure 4 The current waveform diagram is shown.

[0030] Control device 03 detects the disconnection of the circuit current and determines that a pedal is missing.

[0031] like Figure 1 or Figure 3 As shown, either the first conductive brush assembly 01 or the second conductive brush assembly 02 can contact the pedal to remove residual static electricity from the pedal.

[0032] The first conductive brush assembly 01 and the second conductive brush assembly 02 are made of flexible, tough, and thin metal wires with good conductivity. The metal wires have strong installation strength and are not easily pulled out.

[0033] Preferably, the first conductive brush assembly 01 and the second conductive brush assembly 02 are mounted on the curved section where the pedal flips.

[0034] Preferably, the preset interval is half the depth of a pedal.

[0035] Preferably, when the control device 03 detects that the circuit is disconnected for more than a preset time, it determines that the pedal is missing.

[0036] Preferably, when the control device 03 determines that the pedal is missing, it sends a braking command to the moving walkway.

[0037] The present invention has been described in detail above through specific embodiments and examples, but these are not intended to limit the invention. Many modifications and improvements can be made by those skilled in the art without departing from the principles of the invention, and these should also be considered within the scope of protection of the present invention.

Claims

1. A device for detecting missing treads and removing static electricity in an automatic walkway, characterized in that, Includes a first conductive brush assembly, a second conductive brush assembly, and a control device; The first conductive brush assembly and the second conductive brush assembly are installed at a preset interval along the running direction of the pedal at the drive end or steering end of the automatic walkway. The first conductive brush assembly and the second conductive brush assembly are connected to the control device via a cable to form a circuit; when the pedal passes over the first conductive brush assembly and the second conductive brush assembly, it comes into contact with the first conductive brush assembly and the second conductive brush assembly. The control device determines whether the pedal is missing by detecting the continuity of the circuit.

2. The automatic walkway tread missing detection and static electricity removal device according to claim 1, characterized in that, The first conductive brush assembly and the second conductive brush assembly are mounted on the curved section where the pedal flips.

3. The automatic walkway tread missing detection and static electricity removal device according to claim 1, characterized in that, The preset interval is half the depth of a pedal.

4. The automatic walkway tread missing detection and static electricity removal device according to claim 1, characterized in that, When the control device detects that the circuit is disconnected for more than a preset time, it determines that the pedal is missing.

5. The automatic walkway tread missing detection and static electricity removal device according to claim 1, characterized in that, The first conductive brush assembly and the second conductive brush assembly are installed at a preset interval on the protective baffle at the drive end or steering end of the automatic walkway along the running direction of the pedal.

6. The automatic walkway tread missing detection and static electricity removal device according to claim 1, characterized in that, When the control device determines that the pedal is missing, it sends a braking command to the moving walkway.

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