A protection device for preventing escalator step from overturning

Abstract

The utility model discloses a kind of protection devices for preventing escalator step overturning, belong to escalator safety technical field.Aiming at the safety hazard that escalator inclined branch and horizontal branch rotation area is prone to step overturning and cocking due to large curvature, and there is no corresponding protection requirement problem in current specification, the device includes step, up and down roller, rotary pin, arcuate baffle and electrical switch etc. The rotary pin is fixed on the step, located near the lower roller, and is adapted to the gap between the lower roller track and the arcuate baffle; the arcuate baffle is fixed with a vertical rod and a compression spring, and can move up and down along the pin shaft, with the end plate opposite to the electrical switch. When the step overturns, the rotary pin drives the arcuate baffle to move up, and the plate triggers the electrical switch to cut off the safety circuit and stop the escalator. The device has simple structure, strong anti-interference, no calibration, low cost, can accurately deal with the risk of rotation area overturning, and effectively improves the safety of escalator operation.

Description

Technical Field

[0001] This utility model belongs to the field of escalator safety technology, specifically relating to a protective device for preventing escalator steps from tipping over. Background Technology

[0002] Escalators, as important electromechanical special equipment, are widely used in densely populated places such as shopping malls, supermarkets, subways, and airports. While improving travel convenience, they have also become an important part of modern public spaces. Escalators rely on chain drive for operation, and the operation process includes a horizontal traction section for ascending and descending the escalator and an inclined branch traction section for transporting passengers. In the turning area between the inclined and horizontal branches, due to the sharp increase in track curvature, the running state of the steps cannot maintain the stability of the horizontal and inclined sections, making them prone to tipping and tilting upwards.

[0003] This phenomenon directly causes the steps to tilt and vibrate vertically in the tread direction, and in severe cases, it can cause the step drive wheels to derail, posing a significant safety hazard to passengers. However, current escalator inspection regulations such as TSGT7001-2023, testing specifications TSGT7008-2023, national standard GB16899-2011, and elevator maintenance rules TSGT5002-2017 do not specify protective requirements for the aforementioned turning area, resulting in a lack of dedicated protective devices on the market that can effectively address step tilting and vibration. Therefore, developing an anti-tilting detection and protection device adapted to the turning area to fill the existing technological gap and improve the operational safety of escalators has become an urgent need in the field of special equipment safety. Summary of the Invention

[0004] The purpose of this invention is to provide a protective device to prevent escalator steps from tipping over, thereby solving the aforementioned technical problems.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following solution: A protective device to prevent escalator steps from tipping over is installed in the turning area of ​​the escalator and includes a turning pin, an arc-shaped stop plate, and an electrical switch.

[0006] The steps are adapted to the upper roller track and the lower roller track respectively by the upper roller and the lower roller, and can run along the track; the slewing pin is fixedly installed on the steps and close to the lower roller.

[0007] One end of the bow-shaped impact plate is connected to the escalator mounting bracket via a limiting component, and the other end is rotatably connected to the escalator mounting bracket via a pin. A stop plate is fixedly connected to this end, and the stop plate corresponds to the trigger point of an electrical switch, which is connected in series in the escalator's electrical safety circuit. The slewing pin extends through the gap between the lower roller track and the bow-shaped impact plate, and its end is bent and located below the bow-shaped impact plate.

[0008] When the steps flip and shake, the slewing pin rotates upward, causing one end of the bow-shaped impact plate to move upward. Then, the other end of the bow-shaped impact plate rotates around the pin shaft, causing the impact plate to deflect downward and trigger the electrical switch, cutting off the electrical safety circuit to stop the escalator.

[0009] Further optimization involves a limiting component comprising a vertical rod and a spring. A through hole is provided on the arched impact plate, through which the lower end of the vertical rod passes and is fixedly connected to the escalator's mounting bracket. The spring is sleeved on the vertical rod and positioned above the arched impact plate. A limiting top plate is provided at the top of the vertical rod to prevent the spring from falling off. By setting this limiting component, when the steps tilt or shake, the bent part of the swivel pin rotates upwards, causing one end of the arched impact plate to move upwards along the vertical rod, simultaneously compressing the spring, which then acts as a buffer and reset mechanism.

[0010] Further optimization involves the bow-shaped impact plate having a length of 1m-1.5m, and the bow-shaped impact plate being arranged parallel to the running guide rail of the lower roller of the step, with a distance of 30-50mm between them, ensuring that the slewing pin can move smoothly within this gap when the step runs to the turning area.

[0011] Further optimization involves setting the distance between the trigger plate and the electrical switch to 2mm-5mm. This distance ensures that the electrical switch will not be accidentally triggered during normal operation of the ladder, while also ensuring rapid switch activation in the event of a hazard.

[0012] Further optimization involves the installation of two sets of protection devices, symmetrically positioned on both sides of the turning area where the inclined and horizontal branches of the escalator intersect, enabling comprehensive monitoring and protection of the escalator's steps in the turning area.

[0013] Compared with the prior art, the present invention has the following beneficial effects: The device described in this invention is specifically designed for the turning area where step overturning is common, providing highly targeted protection. Furthermore, the device has a simple and compact structure, with core components made from mature mechanical and electrical parts, resulting in low manufacturing costs and facilitating large-scale application. In addition, it combines mechanical triggering with electrical control, eliminating the need for complex calibration processes, providing strong anti-interference capabilities, and maintaining stable detection sensitivity even in complex escalator operating environments. Fourthly, the trigger response is rapid; once step overturning or shaking occurs, the electrical switch is quickly triggered via mechanical transmission, cutting off the safety circuit to stop the escalator, minimizing the duration of danger, and effectively ensuring passenger safety. Attached Figure Description

[0014] Figure 1 Schematic diagram of the turning areas for inclined and horizontal branches; Figure 2 Structural diagram of a protective device to prevent escalator steps from tipping over; Figure 3 A partial enlarged view of the protective device to prevent escalator steps from tipping over; The component names corresponding to each number in the diagram are as follows: 1-Escalator step, 1-1-Upper roller of step, 1-2-Lower roller, 1-3-Swivel pin, 2-Upper roller track, 3-Lower roller track, 4-Arch-shaped impact plate, 5-Vertical rod, 6-Compression spring, 7-Pin shaft, 8-Electrical switch, 4-1-Beat plate. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0016] like Figure 1 , 2 As shown, the protection device to prevent escalator steps from tipping over is configured in two sets, installed on both sides of the turning area where the inclined and horizontal branches of the escalator intersect, as shown. Figure 1 In areas A and B, the two sets of devices have identical structures, with only their installation positions being symmetrically distributed, in order to achieve comprehensive monitoring of the cascade operation status of the slewing area.

[0017] The protective device includes a rotary locking pin 1-3, an arc-shaped impact plate 4, and an electrical switch 8; the step 1 is adapted to the upper roller track 2 and the lower roller track 3 respectively by the upper roller 1-1 and the lower roller 1-2, and can run along the track; the rotary locking pin 1-3 is fixedly installed on the step 1 and close to the lower roller 1-2.

[0018] One end of the bow-shaped impact plate 4 is connected to the escalator mounting frame via a limiting component, and the other end is rotatably connected to the escalator mounting frame via a pin 7. A stop plate 4-1 is fixedly connected to this end, and the stop plate 4-1 is correspondingly positioned to correspond to the triggering part of the electrical switch 8, which is connected in series in the escalator's electrical safety circuit. The rotating locking pin 1-3 extends through the gap between the lower roller track 3 and the bow-shaped impact plate 4, and its end is bent and located below the bow-shaped impact plate 4.

[0019] In this embodiment, the limiting component includes a vertical rod 5 and a spring 6. A through hole is provided on the bow-shaped impact plate 4. The lower end of the vertical rod 5 passes through the through hole and is fixedly connected to the mounting frame of the escalator. The spring 6 is sleeved on the vertical rod 5 and is located above the bow-shaped impact plate 4. A limiting top plate is provided on the top of the vertical rod 5 to prevent the spring from falling off.

[0020] During normal operation of the escalator, step 1 moves smoothly within upper roller track 2 and lower roller track 3 via upper roller 1-1 and lower roller 1-2 respectively. The slewing pin 1-3 moves synchronously within the gap between the bow-shaped impact plate 4 and the lower roller track 3. At this time, the bow-shaped impact plate 4 remains stable under the action of the vertical rod 5 and the compression spring 6. The impact plate 4-1 maintains a distance of 2mm-5mm from the electrical switch 8, the electrical switch 8 is in the closed state, the electrical safety circuit of the escalator is normally connected, and the escalator operates normally.

[0021] When step 1 reaches the turning zone and is at risk of tipping or shaking due to changes in track curvature, step 1 will tend to tip upwards. This will cause the slewing pin 1-3, located near the lower roller 1-2, to move upwards and exert an upward thrust on the bow-shaped impact plate 4. This will cause one end of the bow-shaped impact plate 4 to rotate upwards along the pin 7, causing the striking plate 4-1 at the other end of the bow-shaped impact plate 4 to deflect downwards. When the striking plate 4-1 contacts and triggers the electrical switch 8, the electrical switch 8 connected in series with the escalator's electrical safety circuit will immediately disconnect, the safety circuit will be cut off, the escalator's drive system will stop working, and the escalator will stop quickly. This will prevent further development of dangerous accidents such as step tipping or drive wheel derailment, and ensure the safety of passengers on the steps.

[0022] Once the danger has been eliminated, the bow-shaped impact plate 4 returns to its initial position under the elastic reset action of the compression spring 6 through a manual reset operation. The impact plate 4-1 and the electrical switch 8 return to their initial distance, the electrical switch 8 closes, the electrical safety circuit is activated, and the escalator can resume normal operation.

[0023] In this embodiment, the bow-shaped impact plate 4 is made of high-strength wear-resistant steel and has a length of 1.2m. The distance between it and the lower roller track 3 is fixed at 50mm. The distance between the impact plate 4-1 and the electrical switch 8 is set at 3mm. This parameter combination has been verified through multiple tests and can effectively avoid false triggering caused by normal vibration of the escalator while ensuring the protection sensitivity.

[0024] The above description is only a preferred embodiment of the present utility model and is not intended to limit the scope of the present utility model. Various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model without departing from the spirit of the present utility model should be included within the protection scope defined by the claims of the present utility model.

Claims

1. A protective device for preventing escalator steps from tipping over, characterized in that, Installed in the turning area of ​​the escalator, including turning pins (1-3), bow-shaped bumpers (4) and electrical switches (8). The step (1) is adapted to the upper roller track (2) and the lower roller track (3) respectively by the upper roller (1-1) and the lower roller (1-2), and can run along the track; the slewing pin (1-3) is fixedly installed on the step (1) and close to the lower roller (1-2). One end of the bow-shaped impact plate (4) is connected to the mounting frame of the escalator through a limiting component, and the other end is rotatably connected to the mounting frame of the escalator through a pin (7). A striking plate (4-1) is fixedly connected to this end. The striking plate (4-1) is set to correspond to the triggering part of the electrical switch (8). The electrical switch (8) is connected in series with the electrical safety circuit of the escalator. The rotary pin (1-3) extends through the gap between the lower roller track (3) and the bow-shaped impact plate (4), and its end is bent and located below the bow-shaped impact plate (4); When the step (1) flips and shakes, the slewing pin (1-3) causes one end of the bow-shaped impact plate (4) to move upward, and the other end rotates around the pin shaft (7), causing the impact plate (4-1) to deflect downward and trigger the electrical switch (8), cutting off the electrical safety circuit to stop the escalator.

2. The protective device for preventing escalator step overturning according to claim 1, characterized in that, The limiting components include a vertical rod (5) and a spring (6). A through hole is provided on the bow-shaped impact plate (4). The lower end of the vertical rod (5) passes through the through hole and is fixedly connected to the mounting frame of the escalator. The spring (6) is sleeved on the vertical rod (5) and located above the bow-shaped impact plate (4). A limiting top plate is provided on the top of the vertical rod (5) to prevent the spring from falling off.

3. The protective device for preventing escalator step overturning according to claim 1, characterized in that, The length of the bow-shaped impact plate (4) is 1m-1.5m, and the bow-shaped impact plate (4) is arranged parallel to the running guide rail of the lower roller of the step, with a distance of 30-50mm between them.

4. The protective device for preventing escalator step overturning according to claim 1, characterized in that, The distance between the plate (4-1) and the electrical switch (8) is 2mm-5mm.

5. The protective device for preventing escalator step overturning according to claim 1, characterized in that, Two sets of protective devices are installed symmetrically on both sides of the turning area where the inclined branch and the horizontal branch of the escalator intersect.

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