Anti-reversion protection device for escalator

Abstract

The utility model relates to the technical field of escalator related equipment, and discloses an escalator anti-reversion protection device which comprises a step chain, clamping plates are arranged on the two sides of the upper half section of the step chain respectively, an adjusting mechanism is arranged between the two clamping plates, a first control mechanism is arranged on the upper side of the upper half section of the step chain, and a second control mechanism is arranged on the upper side of the upper half section of the step chain. The first control mechanism is composed of a trigger assembly and a control assembly, the trigger assembly is composed of a connecting plate, a mounting plate, a sliding block, a balancing weight, a connecting rod and a conductive block, and the control assembly is composed of an electrode plate, an electric wire, a small power source, a first signal transmitter and a second signal transmitter. And when the chain is broken and the stair reverses, the first control mechanism can be automatically triggered, so that the two clamping plates are controlled to clamp and fix the stair chain, meanwhile, a driving motor of the escalator can be braked, and the situation that an elevator driving wheel continuously pulls the stair chain is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of escalator-related equipment, in particular to an escalator anti-reversal protection device. Background Art

[0002] An escalator, also known as an automatic escalator, automatic pedestrian elevator, handrail elevator, or escalator, is a means of transport that transports pedestrians in a belt-like manner. Among escalator accidents, escalator reversal accidents pose the greatest threat to passengers and can sometimes cause fatal injuries.

[0003] According to Chinese patent publication CN201777769U, a non-operated anti-reverse protection device for escalators is disclosed. The coordination of a weight, a pawl, and a transmission chain allows the pawl to engage a ratchet wheel in the event of a transmission chain breakage, effectively stopping the vehicle. However, the pawl only brakes the ratchet wheel, while the broken step chain will continue to slide backward along the track, causing the steps connected to the step chain to slide backward or even collapse. Therefore, an anti-reverse protection device for escalators has been proposed. Utility Model Content

[0004] The purpose of the utility model is to provide an escalator anti-reverse protection device to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an escalator anti-reversal protection device, comprising a step chain, clamping plates are respectively provided on both sides of the upper half of the step chain, an adjustment mechanism is provided between the two clamping plates, and a No. 1 control mechanism is provided on the upper side of the upper half of the step chain, the No. 1 control mechanism is composed of a trigger assembly and a control assembly, the trigger assembly is composed of a connecting plate, a mounting plate, a slider, a counterweight block, a connecting rod and a conductive block, and the control assembly is composed of an electrode sheet, an electric wire, a small power supply, a No. 1 signal transmitter and a No. 2 signal transmitter.

[0006] As a further preferred embodiment of the present technical solution, the adjusting mechanism consists of a fixed plate, a servo motor, a double-ended screw, a guide rod and a movable plate, the bottoms of the two clamping plates are respectively fixedly connected to the movable plate, and a fixed plate is respectively provided on the side of the two movable plates away from each other, the two fixed plates are fixedly connected to the inner wall of the shell of the escalator, two guide rods are fixedly connected between the two fixed plates, the guide rods slide through the two movable plates, and two double-ended screws are also rotatably connected between the two fixed plates, the two ends of the double-ended screw respectively pass through the two movable plates and are respectively connected to the two movable plates by threaded fittings, a servo motor is provided in the extension direction of the double-ended screw, the servo motor is fixedly connected to the side wall of the fixed plate, and the output shaft of the servo motor is fixedly connected to the double-ended screw.

[0007] As a further preferred embodiment of the present technical solution, the connecting plate is fixedly connected to the inner wall of the shell of the escalator, and a mounting plate is fixedly connected to the side of the connecting plate close to the step chain. A slide groove is provided on the side wall of the mounting plate, and a slider is slidably installed in the slide groove. A counterweight block is provided on the side wall of the slider, and the counterweight block is located above the upper half of the step chain. The upper end of the slider is fixedly connected to a connecting rod, and the top end of the connecting rod is fixedly connected to a conductive block.

[0008] As a further preferred embodiment of the present technical solution, electrode sheets are respectively provided on the two mutually symmetrical inner walls of the slide groove, a small power supply is fixedly installed on the side wall of the mounting plate, and a signal transmitter No. 1 and a signal transmitter No. 2 are fixedly installed on the bottom of the mounting plate. The small power supply, signal transmitter No. 1 and signal transmitter No. 2 are connected in series between the two electrode sheets through wires.

[0009] As a further preferred embodiment of the present technical solution, the No. 1 signal transmitter is connected to the control center signal of the servo motor, and the No. 2 signal transmitter is connected to the control center signal of the escalator drive motor.

[0010] As a further preferred embodiment of the present technical solution, the counterweight block is a horizontally placed cylindrical structure, and the counterweight block is rotationally connected to the slider.

[0011] As a further preferred embodiment of the present technical solution, a No. 2 control mechanism is provided on the upper side of the lower half of the step chain, and the structure of the No. 2 control mechanism is the same as that of the No. 1 control mechanism.

[0012] The utility model provides an escalator anti-reversal protection device, which has the following beneficial effects:

[0013] The utility model has a unique structural design. When the chain breaks and causes the steps to reverse, the No. 1 control mechanism will be automatically triggered, thereby controlling the two clamping plates to clamp and fix the step chain, preventing the step chain from driving the elevator steps to reverse or collapse. At the same time, the escalator's drive motor will be braked to prevent the elevator drive wheel from continuously pulling the step chain. The counterweight block is designed as a horizontally placed cylindrical structure and is rotatably connected to the slider. The friction between the counterweight block and the step chain can be converted into rolling friction, thereby reducing the wear on the step chain. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 It is a schematic diagram of part of the structure of the utility model;

[0016] Figure 3 It is a structural diagram of the adjustment mechanism in the utility model;

[0017] Figure 4 This is a schematic diagram of the structure of the No. 1 control mechanism in the present utility model;

[0018] In the figure: 1. Step chain; 2. Control mechanism No. 1; 3. Control mechanism No. 2; 4. Fixed plate; 5. Servo motor; 6. Double-ended screw; 7. Guide rod; 8. Clamping plate; 9. Movable plate; 10. Connecting plate; 11. Mounting plate; 12. Slide; 13. Slider; 14. Counterweight; 15. Connecting rod; 16. Conductive block; 17. Electrode sheet; 18. Wire; 19. Small power supply; 20. Signal transmitter No. 1; 21. Signal transmitter No. 2. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0020] The utility model provides a technical solution: Figures 1 to 4 As shown, in this embodiment, an escalator anti-reverse protection device includes a step chain 1, clamping plates 8 are respectively provided on both sides of the upper half of the step chain 1, an adjustment mechanism is provided between the two clamping plates 8, and a No. 1 control mechanism 2 is provided on the upper side of the upper half of the step chain 1. The No. 1 control mechanism 2 is composed of a trigger component and a control component. The trigger component is composed of a connecting plate 10, a mounting plate 11, a slider 13, a counterweight block 14, a connecting rod 15 and a conductive block 16. The control component is composed of an electrode sheet 17, an electric wire 18, a small power supply 19, a No. 1 signal transmitter 20 and a No. 2 signal transmitter 21.

[0021] Among them, the adjusting mechanism is composed of a fixed plate 4, a servo motor 5, a double-ended screw 6, a guide rod 7 and a movable plate 9. The bottoms of the two clamping plates 8 are respectively fixedly connected to the movable plates 9, and the two movable plates 9 are respectively provided with fixed plates 4 on the side away from each other. The two fixed plates 4 are fixedly connected to the inner wall of the shell of the escalator, and two guide rods 7 are fixedly connected between the two fixed plates 4. The guide rod 7 slides through the two movable plates 9. Two double-ended screws 6 are also rotatably connected between the two fixed plates 4. The two ends of the double-ended screw 6 respectively pass through the two movable plates 9 and are respectively connected to the two movable plates 9 by threaded fitting. A servo motor 5 is provided in the extension direction of the double-ended screw 6. The servo motor 5 is fixedly connected to the side wall of the fixed plate 4, and the output shaft of the servo motor 5 is fixedly connected to the double-ended screw 6.

[0022] During use, when the servo motor 5 is started, the servo motor 5 drives the double-headed screw 6 to rotate, thereby controlling the distance between the two movable plates 9, and then controlling the two clamping plates 8 to clamp and fix the step chain 1.

[0023] Among them, the connecting plate 10 is fixedly connected to the inner wall of the escalator shell, and the side of the connecting plate 10 close to the step chain 1 is fixedly connected to the mounting plate 11. A slide groove 12 is opened on the side wall of the mounting plate 11, and a slider 13 is slidably installed in the slide groove 12. A counterweight block 14 is provided on the side wall of the slider 13. The counterweight block 14 is located above the upper half of the step chain 1. The upper end of the slider 13 is fixedly connected to the connecting rod 15, and the top of the connecting rod 15 is fixedly connected to the conductive block 16.

[0024] Among them, electrode sheets 17 are respectively provided on the two mutually symmetrical inner walls of the slide 12, a small power supply 19 is fixedly installed on the side wall of the mounting plate 11, and a No. 1 signal transmitter 20 and a No. 2 signal transmitter 21 are fixedly installed on the bottom of the mounting plate 11. The small power supply 19, the No. 1 signal transmitter 20 and the No. 2 signal transmitter 21 are connected in series between the two electrode sheets 17 through the wire 18. The No. 1 signal transmitter 20 is connected to the control center signal of the servo motor 5, and the No. 2 signal transmitter 21 is connected to the control center signal of the escalator drive motor.

[0025] The counterweight block 14 will press on the upper end of the step chain 1. When the step chain 1 breaks, the counterweight block 14 will move downward, thereby driving the conductive block 16 to move downward. When the conductive block 16 moves between the two electrode pieces 17, the circuit between the small power supply 19, the No. 1 signal transmitter 20 and the No. 2 signal transmitter 21 will be connected. At this time, the No. 1 signal transmitter 20 will transmit a signal to the control center of the servo motor 5, causing the servo motor 5 to start for a period of time. At the same time, the No. 2 signal transmitter 21 will transmit a signal to the control center of the escalator drive motor, causing the escalator drive motor to brake.

[0026] The counterweight 14 is a horizontally placed cylindrical structure, and the counterweight 14 is rotationally connected to the slider 13 .

[0027] With such arrangement, the friction between the counterweight 14 and the step chain 1 becomes rolling friction, thereby reducing the wear on the step chain 1 .

[0028] Since the No. 1 control mechanism 2 is set in the upper half of the step chain 1, when the lower half of the step chain 1 breaks, the upper half of the step chain 1 will not collapse in real time, and the No. 1 control mechanism 2 cannot react in time. Therefore, the following design is made:

[0029] A second control mechanism 3 is provided on the upper side of the lower half of the step chain 1 , and the structure of the second control mechanism 3 is the same as that of the first control mechanism 2 .

[0030] The working principle of the second control mechanism 3 is the same as that of the first control mechanism 2, and will not be described here.

[0031] The utility model provides an escalator anti-reverse protection device, the specific working principle of which is as follows:

[0032] When the step chain 1 breaks, the counterweight 14 will move downward, thereby driving the conductive block 16 to move downward. When the conductive block 16 moves between the two electrode plates 17, the circuit between the small power supply 19, the No. 1 signal transmitter 20 and the No. 2 signal transmitter 21 will be connected. At this time, the No. 1 signal transmitter 20 will transmit a signal to the control center of the servo motor 5, causing the servo motor 5 to start for a period of time. The servo motor 5 will drive the double-headed screw 6 to rotate, thereby controlling the distance between the two movable plates 9, and then controlling the two clamping plates 8 to clamp and fix the step chain 1 to prevent the step chain 1 from causing the elevator steps to collapse. At the same time, the No. 2 signal transmitter 21 will transmit a signal to the control center of the escalator drive motor, causing the escalator drive motor to brake, preventing the elevator drive wheel from continuously pulling the step chain 1. The counterweight 14 is designed as a horizontally placed cylindrical structure and is rotatably connected to the slider 13. The friction between the counterweight 14 and the step chain 1 can be converted into rolling friction, thereby reducing the wear on the step chain 1.

[0033] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An escalator anti-reverse protection device, comprising a step chain (1), characterized in that: Clamping plates (8) are respectively provided on both sides of the upper half of the step chain (1), and an adjustment mechanism is provided between the two clamping plates (8). A first control mechanism (2) is provided on the upper side of the upper half of the step chain (1), and the first control mechanism (2) is composed of a trigger component and a control component. The trigger component is composed of a connecting plate (10), a mounting plate (11), a slider (13), a counterweight (14), a connecting rod (15) and a conductive block (16). The control component is composed of an electrode sheet (17), an electric wire (18), a small power supply (19), a first signal transmitter (20) and a second signal transmitter (21).

2. The escalator anti-reverse protection device according to claim 1, characterized in that: The adjusting mechanism is composed of a fixed plate (4), a servo motor (5), a double-headed screw (6), a guide rod (7) and a movable plate (9). The bottoms of the two clamping plates (8) are respectively fixedly connected with the movable plate (9). The two movable plates (9) are respectively provided with a fixed plate (4) on the side away from each other. The two fixed plates (4) are fixedly connected to the inner wall of the shell of the escalator. Two guide rods (7) are fixedly connected between the two fixed plates (4). The guide rod (7) slides through the two movable plates (9). Two double-headed screws (6) are also rotatably connected between the two fixed plates (4). The two ends of the double-headed screw (6) respectively pass through the two movable plates (9) and are respectively connected to the two movable plates (9) by threaded engagement. A servo motor (5) is provided in the extension direction of the double-headed screw (6). The servo motor (5) is fixedly connected to the side wall of the fixed plate (4). The output shaft of the servo motor (5) is fixedly connected to the double-headed screw (6).

3. The escalator anti-reverse protection device according to claim 1, characterized in that: The connecting plate (10) is fixedly connected to the inner wall of the shell of the escalator, and the side of the connecting plate (10) close to the ladder chain (1) is fixedly connected to a mounting plate (11), a sliding groove (12) is provided on the side wall of the mounting plate (11), a slider (13) is slidably installed in the sliding groove (12), a counterweight (14) is provided on the side wall of the slider (13), and the counterweight (14) is located above the upper half of the ladder chain (1), the upper end of the slider (13) is fixedly connected to a connecting rod (15), and the top end of the connecting rod (15) is fixedly connected to a conductive block (16).

4. The escalator anti-reverse protection device according to claim 3, characterized in that: Electrode sheets (17) are respectively provided on two mutually symmetrical inner walls of the chute (12); a small power supply (19) is fixedly installed on the side wall of the mounting plate (11); a No. 1 signal transmitter (20) and a No. 2 signal transmitter (21) are fixedly installed on the bottom of the mounting plate (11); the small power supply (19), the No. 1 signal transmitter (20) and the No. 2 signal transmitter (21) are connected in series between the two electrode sheets (17) via an electric wire (18).

5. The escalator anti-reverse protection device according to claim 4, characterized in that: The first signal transmitter (20) is connected to the control center signal of the servo motor (5), and the second signal transmitter (21) is connected to the control center signal of the escalator drive motor.

6. The escalator anti-reverse protection device according to claim 1, characterized in that: The counterweight block (14) is a horizontally placed cylindrical structure, and the counterweight block (14) is rotationally connected to the slider (13).

7. The escalator anti-reverse protection device according to claim 1, characterized in that: A second control mechanism (3) is provided on the upper side of the lower half of the step chain (1), and the structure of the second control mechanism (3) is the same as that of the first control mechanism (2).

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