Pedal missing detection and static electricity removal device for moving sidewalk

Abstract

The invention discloses a pedal missing detection and destaticizing device for a moving sidewalk. The pedal missing detection and destaticizing device comprises 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 mounted at the driving end or the steering end of the moving sidewalk according to a preset spacing distance in the running direction of the pedal; the first conductive brush assembly and the second conductive brush assembly are connected to a control device through cables to form a loop; when the pedal passes through the first conductive brush assembly and the second conductive brush assembly, the pedal is in contact with the first conductive brush assembly and the second conductive brush assembly; and the control device judges whether the pedal is missing or not by detecting the on-off of the loop. The device is simple in structure, does not need an expensive sensor, is low in cost, is simple in detection principle, and achieves the dual functions of detecting the missing pedal and removing the static electricity of the pedal.

Description

Technical Field

[0001] The invention relates to the technical field of moving walkways, and in particular to a pedal missing detection and anti-static device for moving walkways. Background Art

[0002] Moving walkways are widely used in various public places, such as large supermarkets. The pedals of moving walkways are connected to the pedal chain through fixing blocks. During use, there is a risk of loosening or even falling off of the fixings due to alternating loads generated by passengers stepping on them, turning over and changing directions, etc., which causes the pedals and pedal chains to become loose and unable to be fixed. Due to the structure of the moving walkway itself, the loosened pedal will not fall off in the working section or the straight section of the return section. When it enters the flipping end, the pedal may fall off due to the drastic change in the motion trajectory. At this time, if a passenger passes by, it is easy for the passenger's feet to fall into the interior of the moving walkway, causing casualties. There are many methods and devices for detecting missing pedals in the industry, but they still have some disadvantages:

[0003] Patent document CN15818407A provides a pedal-missing passenger protection device, which detects pedal missing through two sets of sensors and sets a synchronous conveying device as a platform for passengers to stand and support, meeting the national standard requirements for stopping distance. However, the detection method in this scheme relies on the reliability of the sensor, 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 being vacant. However, the solution is only provided at the flipping position and cannot detect the fault state of the pedal being loose, and cannot completely eliminate the risk.

[0005] Patent document CN103879874B provides a solution for detecting missing steps by comparing the signals generated by two groups of sensors to determine whether there are empty steps. However, this solution has high requirements for sensors, usually photoelectric or magnetic proximity sensors, and the sensors have high requirements for the operating environment, and there is a risk of misoperation or non-operation.

[0006] In the above technical solution, the pedal missing detection device has a complex structure, high requirements on the sensor, and many disadvantages. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a pedal missing detection and anti-static device for a moving walkway, 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 driving end or a turning end of the moving walkway at a preset interval along the running direction of the pedal;

[0009] The first conductive brush assembly and the second conductive brush assembly are connected to the control device through a cable to form a loop; when the pedal passes through the first conductive brush assembly and the second conductive brush assembly, the pedal contacts the first conductive brush assembly and the second conductive brush assembly;

[0010] The control device determines whether the pedal is missing by detecting the on-off state of the circuit.

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

[0012] Preferably, the preset interval is half the depth of the 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 on the protective baffle at the driving end or the steering end of the moving walkway at a preset interval along the running direction of the pedal.

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

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

[0017] First, the detection device of the present invention has a simple structure and does not require a high-precision sensor;

[0018] Second, the detection logic of the detection device in the present invention is simple and clear, and the reliability is higher;

[0019] Thirdly, the conductive device in the present invention also has the function of removing residual static electricity from the pedal. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings of the present invention are intended to illustrate the general characteristics of the methods, structures and / or materials used in specific exemplary embodiments of the present invention, and to supplement the description in the specification. However, the drawings of the present invention are schematic diagrams not drawn to scale, and thus may not accurately reflect the precise structure or performance characteristics of any given embodiment, and the drawings of the present invention should not be interpreted as limiting or restricting the range of values ​​or properties covered by the exemplary embodiments of the present invention. The present invention is further described in detail below in conjunction with the drawings and specific embodiments:

[0021] Figure 1 The figure is a schematic diagram of the overall structure of the pedal missing detection and anti-static device of the moving walkway in Example 1;

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

[0023] Figure 3 It is a schematic diagram of the pedal missing detection and the anti-static device detecting the pedal missing of the moving walkway in Example 1;

[0024] Figure 4 Schematic diagram of the current waveform of the circuit when a pedal is missing during the operation of the moving walkway of Example 1. DETAILED DESCRIPTION

[0025] The following describes the implementation methods of the present invention through specific specific embodiments, and those skilled in the art can fully understand other advantages and technical effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through different specific implementation methods, and the details in this specification can also be applied based on different viewpoints, and various modifications or changes can be made without deviating from the overall design concept of the invention. It should be noted that the following embodiments and the features in the embodiments can be combined with each other in the absence of conflict. The following exemplary embodiments of the present invention can be implemented in a variety of different forms and should not be interpreted as being limited to the specific embodiments described 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 specific embodiments to those skilled in the art.

[0026] Example 1

[0027] like Figures 1 to 4 , shows a preferred embodiment of a pedal missing detection and anti-static device for a moving 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 on a protective baffle 04 at a driving end or a turning end of the moving walkway at a preset interval along the running direction of the pedal. A plurality of pedals 11a to 11f are continuously connected in a ring shape in the moving walkway, and move cyclically, and can move upward or downward.

[0028] like Figure 1 As shown, when there is no pedal loss, the first conductive brush assembly 01 and the second conductive brush assembly 02 are in contact with one or two pedals 11a-11f respectively, and form a smooth circuit with the control device 03, that is, the following is generated: Figure 2 The current waveform 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 do not contact any pedal 11a to 11f, and cannot form a smooth circuit with the control device 03, which results in the following situation: Figure 4 The current waveform is shown.

[0030] The control device 03 detects the disconnection of the loop current and determines that there is a pedal missing.

[0031] like Figure 1 or Figure 3 As shown, any one of the first conductive brush assembly 01 and the second conductive brush assembly 02 is in contact with 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 a relatively stable installation strength and are not easily pulled out.

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

[0034] Preferably, the preset interval is half the depth of the 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, a braking command is sent to the moving walkway.

[0037] The present invention has been described in detail above through specific implementation modes and embodiments, but these do not constitute limitations of the present invention. Without departing from the principles of the present invention, those skilled in the art may also make many variations and improvements, which should also be regarded as the protection scope of the present invention.

Claims

1. A device for detecting missing pedals and removing static electricity for a moving walkway, characterized in that: It 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 driving end or a turning end of the moving walkway at a preset interval along the running direction of the pedal; The first conductive brush assembly and the second conductive brush assembly are connected to the control device through a cable to form a loop; when the pedal passes through the first conductive brush assembly and the second conductive brush assembly, the pedal contacts the first conductive brush assembly and the second conductive brush assembly; The control device determines whether the pedal is missing by detecting the on-off state of the circuit.

2. The pedal missing detection device and anti-static device of the moving walkway according to claim 1, characterized in that: The first conductive brush assembly and the second conductive brush assembly are installed on the bent section where the pedal is flipped.

3. The pedal missing detection device and anti-static device of the moving walkway according to claim 1, characterized in that: The preset interval is half the depth of the pedal.

4. The pedal missing detection device and anti-static device of a moving walkway 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 pedal missing detection device and anti-static device of a moving walkway according to claim 1, characterized in that: The first conductive brush assembly and the second conductive brush assembly are installed on the protective baffle at the driving end or the steering end of the moving walkway at a preset interval along the running direction of the pedal.

6. The pedal missing detection device and anti-static device of a moving walkway according to claim 1, characterized in that: When the control device determines that the pedal is missing, a braking command is sent to the moving walkway.

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