Step missing detection device

Abstract

The utility model belongs to the technical field of step missing detection, and particularly relates to a step missing detection device which comprises a base, an escalator is mounted on the base, a first mounting plate is mounted on the inner wall of one handrail, a lifting rod is assembled in a rod groove, a fixing frame is mounted on the bottom side of the lifting rod, and a second mounting plate is mounted on the fixing frame. A pulley is rotatably mounted on the fixing frame, a first electrode plate is mounted on the inner wall of the rod groove, a second electrode plate is mounted on the top side of the lifting rod, an indicator lamp is mounted on the outer wall of the first mounting plate, and the lifting rod is vertically and upwards moved through the metal step at the fifth step by lifting the metal step at the fifth step. The lifting rod drives the second electrode plate and the first electrode plate on the lifting rod to make contact, at the moment, the indicator lamp is turned on, the control panel receives electric signals sent by the indicator lamp after the fixed interval, the control panel controls the alarm lamp to give an alarm for prompting, and the structure can operate stably and is beneficial to improving the reliability of the device.

Description

Technical Field

[0001] The utility model relates to the technical field of missing step detection, in particular to a missing step detection device. Background Art

[0002] As an indispensable means of transportation in modern urban life, the safety of escalators is of paramount importance. However, in actual operation, escalators sometimes have missing steps, posing a safety hazard to passengers. Therefore, a detection device is needed to detect missing steps.

[0003] A Chinese patent with publication number CN118270631A discloses a simple escalator step missing detection device, including a mechanical limit switch, which is connected to the safety circuit of the escalator. The mechanical limit switch is installed on the side bracket of the comb plate to ensure that the mechanical limit switch is in close contact with the upper edge of the step; the escalator step missing detection device of the present invention adopts a mechanical switch limit switch to monitor the step status of the escalator in real time. When the step is missing, it can trigger the mechanical limit switch to forcibly cut off the safety circuit to stop the escalator from running, ensuring the safety of passengers. The device has a simple structure, high stability, and is not easily affected by environmental interference; it has a fast response speed and can quickly detect the missing step; it has low maintenance cost and is easy to install, add and debug; it can be easily connected in series with the safety circuit to achieve more comprehensive safety protection.

[0004] Existing detection devices usually rely on photoelectric sensing technology to detect missing steps on escalators. Due to its high sensitivity, it is easily affected by environmental interference, resulting in poor reliability of the device. Therefore, a missing step detection device is proposed to address the above problem. Utility Model Content

[0005] In order to make up for the deficiencies of the prior art and solve the problems existing in the prior art, the utility model proposes a step missing detection device.

[0006] The technical solution adopted by the utility model to solve its technical problem is as follows: a step missing detection device according to the utility model comprises a base, an escalator is installed on the base, a handrail is installed on the escalator, a metal step is installed between the handrails, the metal step is provided with a first step, a second step, a third step, a fourth step and a fifth step, a first mounting plate is installed on the inner wall of one of the handrails, a rod groove is provided inside the first mounting plate, a lifting rod is installed in the rod groove, a fixing frame is installed on the bottom side of the lifting rod, a pulley is rotatably installed on the fixing frame, and the fifth step is located below the pulley, a limiting groove is provided inside the first mounting plate, a limiting block is installed in the limiting groove, the limiting block is sleeved on the outer periphery of the lifting rod and fixedly connected to the lifting rod, a spring is installed between the top side of the limiting block and the inner wall of the limiting groove, a first electrode sheet is installed on the inner wall of the rod groove, a second electrode sheet is installed on the top side of the lifting rod, an indicator light is installed on the outer wall of the first mounting plate, and the indicator light is connected to the first electrode sheet and the second electrode sheet through an internal circuit. The escalator is connected to the handrail, and several gears are arranged inside the handrail, and the gears are covered with tracks, and a row of rollers are arranged on both sides of the track, and the metal steps are arranged on the tracks, and a motor is installed inside the escalator, and the output shaft of the motor is fixedly connected to the rotating shaft on the roller, an alarm light is installed on the outer wall of the first mounting plate, and a control panel is installed on the outer wall of the handrail, and the control panel is connected to the alarm light and the indicator light through an internal circuit, and a switch button is installed on the outer wall of the handrail, and the switch button is connected to the motor through an internal circuit, and is raised on the fifth step through the metal step. The metal step at the fifth step position pushes the pulley upward, and the pulley drives the lifting rod to move vertically upward, and the lifting rod drives the second electrode sheet on it to move vertically upward, so that the second electrode sheet contacts the first electrode sheet. At this time, the indicator light lights up, and the indicator light sends an electrical signal to the control panel. If the control panel does not receive the electrical signal sent by the indicator light after a fixed interval, the control panel will control the alarm light to sound an alarm to prompt. This structure will not be affected by external interference, the device can operate stably, and it is beneficial to improve the reliability of the device.

[0007] Preferably, a second mounting plate is installed on the inner wall of the other handrail, an assembly slot is provided in the second mounting plate, an infrared rangefinder is installed in the assembly slot, the infrared rangefinder is connected to the control panel through an internal circuit, an infrared generator and an infrared receiver are installed inside the infrared rangefinder, and the distance between the infrared rangefinder and the metal step is measured by the infrared rangefinder. If the threshold range is exceeded, it means that the metal step on the fifth step has not been raised. The control panel will control the alarm light to sound an alarm to prompt. While detecting by photoelectric ranging, a lifting rod is used for more stable and reliable mechanical detection. The two detection structures simultaneously perform step missing detection on the escalator, which is beneficial to improving the accuracy of detection.

[0008] The utility model is beneficial in that:

[0009] 1. The utility model is raised on the fifth step by the metal step. The metal step at the fifth step position pushes the pulley upward, and the pulley drives the lifting rod to move vertically upward. The lifting rod drives the second electrode sheet thereon to move vertically upward, so that the second electrode sheet contacts the first electrode sheet. At this time, the indicator light lights up, and the indicator light sends an electrical signal to the control panel. If the control panel does not receive the electrical signal sent by the indicator light after a fixed interval, the control panel will control the alarm light to sound an alarm. This structure will not be affected by external interference, the device can operate stably, and it is beneficial to improve the reliability of the device.

[0010] 2. The utility model uses an infrared rangefinder to measure the distance between the infrared rangefinder and the metal step. If the distance exceeds the threshold range, it means that the metal step on the fifth step has not been raised. The control panel will control the alarm light to sound an alarm to prompt. While detecting through photoelectric distance measurement, a lifting rod is used for more stable and reliable mechanical detection. The two detection structures simultaneously detect missing steps on the escalator, which is beneficial to improve the accuracy of detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0012] Figure 1 It is a schematic diagram of a first-person perspective three-dimensional structure;

[0013] Figure 2 It is a schematic diagram of the three-dimensional structure of the mounting plate;

[0014] Figure 3 It is a schematic diagram of the three-dimensional structure of the lifting rod;

[0015] Figure 4 This is a schematic diagram of the three-dimensional structure of the first mounting plate;

[0016] Figure 5 It is a schematic diagram of the three-dimensional structure at the second mounting plate.

[0017] In the figure: 1. Base; 2. Escalator; 3. Handrail; 4. Metal ladder; 5. First step; 6. Second step; 7. Third step; 8. Fourth step; 9. Fifth step; 10. First mounting plate; 11. Rod slot; 12. Lifting rod; 13. Fixed bracket; 14. Pulley; 15. Limiting slot; 16. Limiting block; 17. Spring; 18. First electrode sheet; 19. Second electrode sheet; 20. Indicator light; 21. Alarm light; 22. Control panel; 23. Switch button; 24. Second mounting plate; 25. Assembly slot; 26. Infrared rangefinder; 27. Infrared generator; 28. Infrared receiver. DETAILED DESCRIPTION

[0018] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1-4As shown, a step missing detection device includes a base 1, an escalator 2 is installed on the base 1, a handrail 3 is installed on the escalator 2, a metal step 4 is installed between the handrails 3, and the metal step 4 is provided with a first step 5, a second step 6, a third step 7, a fourth step 8 and a fifth step 9. A first mounting plate 10 is installed on the inner wall of one of the handrails 3, a rod groove 11 is opened inside the first mounting plate 10, a lifting rod 12 is assembled in the rod groove 11, a fixing frame 13 is installed on the bottom side of the lifting rod 12, a pulley 14 is rotatably installed on the fixing frame 13, and the fifth step 9 is located below the pulley 14. A limiting groove 15 is provided, in which a limiting block 16 is assembled. The limiting block 16 is sleeved on the periphery of the lifting rod 12 and fixedly connected to the lifting rod 12. A spring 17 is installed between the top side of the limiting block 16 and the inner wall of the limiting groove 15. A first electrode piece 18 is installed on the inner wall of the rod groove 11, and a second electrode piece 19 is installed on the top side of the lifting rod 12. An indicator light 20 is installed on the outer wall of the first mounting plate 10. The indicator light 20 is connected to the first electrode piece 18 and the second electrode piece 19 through an internal circuit. Several gears are provided inside the handrail 3, and the gears are covered with tracks. A row of rollers are provided on both sides of the tracks, and a metal ladder 4 is provided on the tracks. , a motor is installed inside the escalator 2, and the output shaft of the motor is fixedly connected to the rotating shaft on the roller, an alarm light 21 is installed on the outer wall of the first mounting plate 10, and a control panel 22 is installed on the outer wall of the handrail 3. The control panel 22 is connected to the alarm light 21 and the indicator light 20 through an internal circuit, and a switch button 23 is installed on the outer wall of the handrail 3. The switch button 23 is connected to the motor through an internal circuit; when working, the existing detection device usually relies on photoelectric sensing technology in the process of detecting step missing on the escalator 2. Due to its high sensitivity, it is easily interfered by the environment, resulting in poor reliability of the device, and the motor is used to detect the missing step. The operation drives the roller to rotate, the roller drives the crawler to rotate, the crawler drives several gears to rotate, and the crawler realizes the stable rotation of the crawler, and the crawler drives the metal step 4 thereon to rotate. When the metal step 4 moves to the positions of the first step 5, the second step 6 and the third step 7, the metal step 4 is in a horizontal state. When the metal step 4 moves to the fourth step 8, the metal step 4 starts to move forward and moves upward at the same time. When the metal step 4 moves to the fifth step 9, the metal step 4 is in a raised state relative to the horizontal state. If the metal step 4 does not rise at the fifth step 9, it means that the step of the escalator 2 is missing.

[0020] If the metal step 4 is raised at the fifth step 9, the metal step 4 at the position of the fifth step 9 will push the pulley 14 upwards. At the same time, the metal step 4 is also moving horizontally. The pulley 14 rolls on the metal step 4. After the metal step 4 pushes the pulley 14 upwards, the pulley 14 drives the lifting rod 12 to move vertically upwards. The lifting rod 12 drives the limit block 16 to move in the limit groove 15, realizing the stable vertical movement of the lifting rod 12. The lifting rod 12 drives the second electrode sheet 19 thereon to move vertically upwards, so that the second electrode sheet 19 contacts the first electrode sheet 18. At this time, the indicator light 20 lights up. The indicator light 20 sends an electrical signal to the control panel 22. Since all the metal steps 4 will move to the fifth step 9 in sequence, the lifting rod 12 will be lifted in sequence, so that the indicator light 20 will light up continuously. The time between the two lighting up of the indicator light 20 is a fixed interval. When the indicator light 20 does not light up after the fixed interval, it means that the step of the escalator 2 is missing. At this time, since the control panel 22 has not received the electrical signal sent by the indicator light 20 after the fixed interval, the control panel 22 will control the alarm light 21 to sound an alarm. This structure will not be affected by external interference, the device can operate stably, and it is beneficial to improve the reliability of the device.

[0021] See also Figure 5As shown, a second mounting plate 24 is mounted on the inner wall of the other handrail 3, and an assembly slot 25 is provided in the second mounting plate 24. An infrared rangefinder 26 is mounted in the assembly slot 25. The infrared rangefinder 26 is connected to the control panel 22 through an internal circuit, and an infrared generator 27 and an infrared receiver 28 are installed inside the infrared rangefinder 26. When working, the existing detection device usually adopts a single structure for detection in the process of detecting missing steps of the escalator 2, resulting in poor detection accuracy. The metal step 4 is raised on the fifth step 9, and the infrared generator 27 on the infrared rangefinder 26 sends an infrared light beam to the metal step 4 at the position of the fifth step 9. The infrared light beam is reflected after encountering the metal step 4, and the reflected infrared light beam is received by the infrared receiver 28. The infrared receiver 28 converts the light signal into an electrical signal, and the infrared receiver 28 sends the electrical signal to the control panel 22. The control panel The board 22 obtains the time interval between the infrared light beam being sent out and being received back. The control panel 22 calculates the distance between the infrared rangefinder 26 and the metal step 4 according to the propagation speed of the infrared light beam in the air and the time interval between the infrared light beam being sent out and being received back. There is a threshold range for the distance between the infrared rangefinder 26 and the metal step 4 at the position of the fifth step 9. If the threshold range is exceeded, it means that the metal step 4 on the fifth step 9 has not been raised. The infrared rangefinder 26 measures the distance to the metal step 4 on the sixth step. At this time, the control panel 22 will control the alarm light 21 to sound an alarm to prompt, thereby realizing the detection of missing steps through photoelectric ranging. While detecting through photoelectric ranging, the lifting rod 12 is used for more stable and reliable mechanical detection. The two detection structures simultaneously detect missing steps on the escalator 2, which is beneficial to improving the accuracy of detection.

[0022] Working principle: In the process of detecting missing steps of the escalator 2, the existing detection device usually relies on photoelectric sensing technology. Due to its high sensitivity, it is easily disturbed by the environment, resulting in poor reliability of the device. The motor is operated to drive the roller to rotate, the roller drives the track to rotate, and the track drives several gears to rotate, thereby achieving stable rotation of the track, and the track drives the metal step 4 thereon to rotate. When the metal step 4 moves to the positions of the first step 5, the second step 6 and the third step 7, the metal step 4 is in a horizontal state at this time. When the metal step 4 moves to the fourth step 8, the metal step 4 starts to move forward and moves upward at the same time. When the metal step 4 moves to the fifth step 9, the metal step 4 is in a raised state relative to the horizontal state. If the metal step 4 does not rise at the fifth step 9, it indicates that the step of the escalator 2 is missing; if the metal step 4 rises at the fifth step 9, the metal step 4 at the position of the fifth step 9 will push the pulley 14 upward, and at the same time the metal step 4 is also in a horizontal state. The escalator 2 is moved horizontally, the pulley 14 rolls on the metal step 4, and after the metal step 4 pushes the pulley 14 upward, the pulley 14 drives the lifting rod 12 to move vertically upward, and the lifting rod 12 drives the limit block 16 to move in the limit slot 15, realizing the stable vertical movement of the lifting rod 12, and the lifting rod 12 drives the second electrode sheet 19 thereon to move vertically upward, so that the second electrode sheet 19 contacts the first electrode sheet 18, at this time the indicator light 20 lights up, and the indicator light 20 sends an electrical signal to the control panel 22. Since all the metal steps 4 will move to the fifth step 9 in turn, the lifting rod 12 will be lifted in turn, so that the indicator light 20 lights up continuously, and the time for the indicator light 20 to light up twice is a fixed interval. When the indicator light 20 does not light up after the fixed interval, it indicates that the step of the escalator 2 is missing. At this time, since the control panel 22 has not received the electrical signal sent by the indicator light 20 after the fixed interval, the control panel 22 will control the alarm light 21 to sound an alarm. This structure will not be affected by external interference, the device can operate stably, which is conducive to improving the reliability of the device.In the process of detecting missing steps on the escalator 2, the existing detection device usually adopts a single structure for detection, resulting in poor detection accuracy. The metal step 4 is raised on the fifth step 9, and the infrared generator 27 on the infrared rangefinder 26 sends an infrared beam to the metal step 4 at the position of the fifth step 9. The infrared beam is reflected after encountering the metal step 4. The reflected infrared beam is received by the infrared receiver 28, and the infrared receiver 28 converts the optical signal into an electrical signal. The infrared receiver 28 sends the electrical signal to the control panel 22. The control panel 22 obtains the time interval between the infrared beam being sent out and being received back. The control panel 22 obtains the time interval between the infrared beam being sent out and being received back according to the propagation speed of the infrared beam in the air and the time interval between the infrared beam being sent out and the time interval between the infrared beam being received back ... The distance between the infrared rangefinder 26 and the metal step 4 is calculated from the time interval between the infrared rangefinder 26 and the reception of the signal. The distance between the infrared rangefinder 26 and the metal step 4 at the fifth step 9 is within a threshold range. If the threshold range is exceeded, it indicates that the metal step 4 on the fifth step 9 has not been raised. The infrared rangefinder 26 measures the distance to the metal step 4 on the sixth step. At this time, the control panel 22 controls the alarm light 21 to sound an alarm, thus achieving step-missing detection through photoelectric distance measurement. Simultaneously with photoelectric distance measurement, the lifting rod 12 is used for more stable and reliable mechanical detection. These two detection structures simultaneously detect step-missing escalators 2, improving detection accuracy.

[0023] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the present invention as claimed.

Claims

1. A missing step detection device, characterized in that: The invention comprises a base (1), an escalator (2) is installed on the base (1), a handrail (3) is installed on the escalator (2), a metal ladder (4) is installed between the handrails (3), a first step (5), a second step (6), a third step (7), a fourth step (8) and a fifth step (9) are provided on the metal ladder (4), a first mounting plate (10) is installed on the inner wall of one of the handrails (3), a rod groove (11) is provided inside the first mounting plate (10), a lifting rod (12) is assembled in the rod groove (11), a fixing frame (13) is installed on the bottom side of the lifting rod (12), a pulley (14) is rotatably installed on the fixing frame (13), and the pulley (14) is rotatably mounted on the fixing frame (13). 4) is below the fifth step (9), a limiting groove (15) is provided inside the first mounting plate (10), a limiting block (16) is assembled in the limiting groove (15), the limiting block (16) is sleeved on the outer periphery of the lifting rod (12) and is fixedly connected to the lifting rod (12), a spring (17) is installed between the top side of the limiting block (16) and the inner wall of the limiting groove (15), a first electrode sheet (18) is installed on the inner wall of the rod groove (11), a second electrode sheet (19) is installed on the top side of the lifting rod (12), an indicator light (20) is installed on the outer wall of the first mounting plate (10), and the indicator light (20) is connected to the first electrode sheet (18) and the second electrode sheet (19) through an internal circuit.

2. The missing step detection device according to claim 1, wherein: A plurality of gears are arranged inside the handrail (3), and the gears are covered with a crawler track, and a row of rollers are arranged on both sides of the crawler track. The metal ladder (4) is arranged on the crawler track, and a motor is installed inside the escalator (2), and the output shaft of the motor is fixedly connected to the rotating shaft on the roller.

3. The missing step detection device according to claim 1, wherein: An alarm light (21) is installed on the outer wall of the first mounting plate (10), and a control panel (22) is installed on the outer wall of the handrail (3). The control panel (22) is connected to the alarm light (21) and the indicator light (20) through an internal circuit.

4. The missing step detection device according to claim 1, wherein: A switch button (23) is installed on the outer wall of the handrail (3), and the switch button (23) is connected to the motor through an internal circuit.

5. The missing step detection device according to claim 1, wherein: A second mounting plate (24) is mounted on the inner wall of the other handrail (3), a mounting groove (25) is provided in the second mounting plate (24), and an infrared rangefinder (26) is mounted in the mounting groove (25).

6. The missing step detection device according to claim 5, characterized in that: The infrared rangefinder (26) is connected to the control panel (22) via an internal circuit, and an infrared generator (27) and an infrared receiver (28) are installed inside the infrared rangefinder (26).

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