Anti-falling telescopic device for metro platform screen door

Abstract

The invention relates to the field of anti-falling surfaces, in particular to an anti-falling telescopic device for a metro platform screen door, which comprises a mounting groove formed in a metro platform, and further comprises a telescopic plate, a traction mechanism and a jacking mechanism, the traction mechanism comprises a sliding plate, a transmission assembly and a first rotating assembly, and the jacking mechanism comprises a second rotating assembly, two guide rails and two swing assemblies. According to the anti-falling telescopic device for the metro platform screen door, when the metro platform screen door is opened every time, the jacking mechanism is driven by the traction mechanism to operate, so that the telescopic plate ascends to fill up a gap between the edge of a metro platform and the metro door, the metro platform screen door is prevented from falling off, and the service life of the metro platform screen door is prolonged. A passenger can conveniently tread and pass, independent power equipment does not need to be arranged for supplying power to the telescopic plate to achieve opening and closing of the telescopic plate, the power consumption of the device is reduced, and then the anti-falling cost is reduced.

Description

Technical Field

[0001] The invention relates to the field of anti-fall surfaces, and in particular to an anti-fall telescopic device for a subway screen door. Background Art

[0002] A platform screen door (PSM) is a glass curtain wall that encloses the subway platform and the area where trains board and alight. When a train arrives, the electric doors on the glass curtain wall open to allow passengers to board and alight. A gap of 15-20cm exists between the subway door and the platform, creating a gap between the platform and the PSM door. If left unfilled, passengers can easily get stuck and fall, potentially causing accidents.

[0003] The existing anti-fall telescopic device has the following shortcomings: 1. A separate power device is required to drive the telescopic plate to fill the gap between the platform and the platform screen door. Every time a train arrives at the station, it needs to be powered on, which consumes a lot of power and increases the cost of anti-fall.

[0004] 2. There is no structure designed to increase the stability of the telescopic board when stepped on. After long-term stepping by passengers, the telescopic board is prone to tilt, thereby reducing the service life of the telescopic board. Summary of the Invention

[0005] The purpose of the present invention is to provide an anti-fall telescopic device for subway screen doors.

[0006] To achieve this object, the present invention adopts the following technical solutions: Provided is a drop-proof telescopic device for a subway platform door, comprising a mounting slot provided inside a subway platform; It also includes a telescopic plate, a traction mechanism and a jacking mechanism; The traction mechanism is arranged inside the mounting groove, and the traction mechanism includes a slide plate, a transmission assembly and a first rotating assembly. The slide plate is slidably arranged on the inner top of the mounting groove through two slide bars. The first rotating assembly is arranged inside the mounting groove, and the transmission assembly is arranged between the slide plate and the first rotating assembly. The jacking mechanism is arranged inside the mounting groove. The jacking mechanism includes a second rotating component, two guide rails and two swinging components. The second rotating component is arranged inside the mounting groove. The two guide rails are fixed on the outer wall of the platform. Each swinging component is arranged between the second rotating component and one of the guide rails. A sliding column is slidingly provided on each guide rail, and the telescopic plate is fixedly connected to the two sliding columns.

[0007] Furthermore, two sliders are provided for sliding on the top of the platform, and a shield door is fixed on the top of each slider. One of the sliders is fixedly connected to the top of the slide. The transmission assembly includes a rack and a gear. A first rotating shaft is provided for rotating inside the mounting groove. The gear is fixed on the first rotating shaft. The rack is fixed at the bottom of the slide, and the gear is meshed with the rack.

[0008] Furthermore, the first rotating component includes a driving wheel, a driven wheel and a belt. A second rotating shaft is rotatably provided at the inner bottom of the mounting groove. The driving wheel and the driven wheel are fixed on the first rotating shaft and the second rotating shaft respectively, and the belt is arranged between the driving wheel and the driven wheel.

[0009] Furthermore, the second rotating assembly includes a rotating rod, a first bevel gear and a second bevel gear. The rotating rod is rotatably arranged inside the mounting groove. The first bevel gear and the second bevel gear are respectively fixed on the second rotating shaft and the rotating rod. The first bevel gear and the second bevel gear are meshed and connected.

[0010] Furthermore, each swing assembly includes a turntable, a connecting rod, a rocker arm and a first plug rod. The turntable is fixed at one end of the turntable, the connecting rod is hinged on the outer wall of the turntable, the rocker arm is rotatably arranged inside the mounting groove, the first plug rod is fixed at the end of the connecting rod away from the turntable, a second plug rod is fixed on the outer wall of each sliding column, and a first avoidance groove and a second avoidance groove for the first plug rod and the second plug rod to be plugged in are respectively provided at both ends of the turntable, and an avoidance notch for the second plug rod to slide is provided on the outer wall of the guide rail.

[0011] Furthermore, two sliding rods are slidably provided at both ends of the top of each guide rail, and a hemispherical buckle and an anti-drop block are fixed at both ends of each sliding rod. A groove for the contraction of the two hemispherical buckles is provided on the outer wall of the guide rail, and a telescopic spring is sleeved on the outer wall of each sliding rod. Two L-shaped blocks are symmetrically provided at both ends of the top of the guide rail, and each sliding rod is plugged into an L-shaped block. The outer wall of each sliding column is symmetrically provided with hemispherical grooves for the two hemispherical buckles to be engaged.

[0012] Furthermore, four docking blocks are symmetrically arranged on the inner wall of the installation groove, and a threaded groove is provided on the outer wall of each docking block. A cover plate is inserted on the open end of the installation groove, and four bolts are fixed at the four corners of the cover plate, and each bolt is threadedly connected to a threaded groove.

[0013] Furthermore, a slide groove for two sliders to slide is provided on the top of the platform, and an accordion protective cover is provided between each slider and a shield door.

[0014] Furthermore, a plurality of anti-skid pads are inserted on the top of the telescopic plate, and each anti-skid pad is made of rubber material.

[0015] Furthermore, two light troughs are symmetrically provided on the top of the telescopic plate, an LED lamp is installed inside each light trough, and a transparent lampshade is fixed on the top of each light trough.

[0016] Beneficial effects of the present invention: 1. The present invention utilizes a traction mechanism, namely, a slide plate, a transmission assembly, and a first rotating assembly, to link the opening of the platform screen door with the opening of the telescopic plate. This means that each time the platform screen door is opened, the traction mechanism drives the lifting mechanism to operate, thereby raising the telescopic plate. This fills the gap between the subway platform edge and the subway door, making it easier for passengers to pass through. This eliminates the need for separate power equipment to power the telescopic plate for opening and closing, thereby reducing the power consumption of the device and, in turn, the cost of preventing falls.

[0017] 2. The present invention designs two symmetrical sliding rods, hemispherical buckles and compression springs on the outer wall of the guide rail, and designs two symmetrical hemispherical grooves on the outer wall of the slide column. After the telescopic plate is raised into position, the slide columns fixed at both ends of the telescopic plate can be locked, thereby improving the stability of the telescopic plate and further improving the safety of passengers stepping on it, preventing the telescopic plate from tilting due to long-term stepping on by passengers, and thus helping to increase the service life of the telescopic plate.

[0018] 3. The present invention is designed to have several anti-skid pads inserted on the top of the telescopic board. Each anti-skid pad is made of rubber material. By making each anti-skid pad of rubber material, the friction generated when passengers walk on the top of the telescopic board can be increased, thereby preventing the passengers' feet from slipping in rainy and snowy weather and improving safety when passing.

[0019] 4. The present invention symmetrically designs two LED lamps on the top of the telescopic plate, and a transparent lampshade is fixed on the top of each lamp trough. Each lamp trough is used to install an LED lamp. The transparent lampshade facilitates the light to pass through, achieving a lighting effect, and making it convenient for passengers to step on the telescopic plate accurately at night. At the same time, it protects the LED lamp inside the lamp trough, preventing moisture from entering the lamp trough and causing malfunction of the LED lamp, which is beneficial to extending its service life.

[0020] 5. The present invention designs an accordion protective cover at each chute position. The cover is made of PVC material and has excellent waterproof, wear-resistant and anti-aging properties. It can shield the chute, thereby having a certain shielding effect on the components inside the installation groove, preventing rain and snow on the top of the platform from entering the interior of the installation groove through the chute in rainy and snowy weather and causing rust of its internal components. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings in the embodiments of the present invention.

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 for Figure 1 A magnified view of point A in the figure; Figure 3This is a schematic diagram of the cross-sectional structure of the platform of the present invention. Figure 1 ; Figure 4 for Figure 3 Enlarged view of point B in FIG. Figure 5 for Figure 3 Enlarged view of point C in the figure; Figure 6 This is a schematic diagram of the cross-sectional structure of the platform of the present invention. Figure 2 ; Figure 7 for Figure 6 The enlarged view of point D in the figure; Figure 8 for Figure 6 Enlarged view of point E in the figure; Figure 9 for Figure 6 The enlarged view of point F in the figure; In the figure: mounting groove 10, telescopic plate 11, skateboard 12, slide 13, guide rail 14, slide column 15, slider 16, shield door 17, rack 18, gear 19, driving wheel 20, driven wheel 21, belt 22, rotating rod 23, first bevel gear 24, second bevel gear 25, turntable 26, connecting rod 27, rocker arm 28, first plug rod 29, second plug rod 30, first avoidance groove 31, second avoidance groove 32, slide rod 33, hemispherical buckle 34, anti-slip block 35, groove 36, telescopic spring 37, hemispherical slot 38, docking block 39, cover plate 40, accordion protective cover 41, anti-slip pad 42, LED lamp 43, transparent lampshade 44, subway door 46, subway 47, platform 48. DETAILED DESCRIPTION

[0023] The technical solution of the present invention will be further described below with reference to the accompanying drawings and through specific implementation methods.

[0024] The accompanying drawings are for illustrative purposes only and are schematic diagrams rather than actual drawings, and should not be construed as limiting the present invention. In order to better illustrate the embodiments of the present invention, certain components of the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent the dimensions of actual products.

[0025] Reference Figures 1 to 9 As shown, the present invention provides an anti-fall telescopic device for a subway screen door, comprising a mounting groove 10 provided inside a subway platform 47 48; It also includes a telescopic plate 11, a traction mechanism and a jacking mechanism; The traction mechanism is provided inside the mounting groove 10 and includes a slide plate 12, a transmission assembly, and a first rotating assembly. The slide plate 12 is slidably provided on the inner top of the mounting groove 10 via two slide bars 13. The first rotating assembly is provided inside the mounting groove 10, and the transmission assembly is provided between the slide plate 12 and the first rotating assembly. The jacking mechanism is arranged inside the mounting groove 10. The jacking mechanism includes a second rotating component, two guide rails 14 and two swinging components. The second rotating component is arranged inside the mounting groove 10. The two guide rails 14 are fixed on the outer wall of the platform 48. Each swinging component is arranged between the second rotating component and one of the guide rails 14. A sliding column 15 is slidably provided on each guide rail 14, and the telescopic plate 11 is fixedly connected to the two sliding columns 15.

[0026] Reference Figures 1 to 9 As shown, two sliders 16 are provided for sliding at the top of the platform 48, and a screen door 17 is fixed on the top of each slider 16. One of the sliders 16 is fixedly connected to the top of the slide 12, and the transmission assembly includes a rack 18 and a gear 19. The internal rotation of the mounting groove 10 is provided with a first rotating shaft, the gear 19 is fixed on the first rotating shaft, the rack 18 is fixed at the bottom of the slide 12, and the gear 19 is meshed with the rack 18. When the subway 47 arrives at the platform 48, the two subway screen doors 17 are opened by the motor and the transmission device. The motor and the transmission device are existing technology and are not described here. When the two subway screen doors 17 are opened, that is, when the two screen doors 17 are away from each other, each screen door 17 is slidably connected to the slide groove through the slider 16. Since one of the sliders 16 is fixedly connected to the top of the slide 12, the gear 19 is fixedly connected to the first rotating shaft, the rack 18 is fixedly connected to the bottom of the slide 12, and the gear 19 is meshed with the rack 18, thereby causing the gear 19 to rotate.

[0027] Reference Figures 1 to 9 As shown, the first rotating assembly includes a driving wheel 20, a driven wheel 21 and a belt 22. A second rotating shaft is rotatably provided at the inner bottom of the mounting groove 10. The driving wheel 20 and the driven wheel 21 are fixed on the first rotating shaft and the second rotating shaft respectively. The belt 22 is sleeved between the driving wheel 20 and the driven wheel 21. When the gear 19 rotates, since the gear 19 and the driving wheel 20 are fixedly connected to the first rotating shaft, the driven wheel 21 is fixedly connected to the second rotating shaft, the driving wheel 20 and the driven wheel 21 are sleeved by the belt 22. In addition, the diameter of the driving wheel 20 is smaller than the diameter of the driven wheel 21, so that the second rotating shaft rotates slowly at a suitable angle.

[0028] Reference Figures 1 to 9As shown, the second rotating assembly includes a rotating rod 23, a first bevel gear 24 and a second bevel gear 25. The rotating rod 23 is rotatably arranged inside the mounting groove 10, and the first bevel gear 24 and the second bevel gear 25 are respectively fixedly arranged on the second rotating shaft and the rotating rod 23, and the first bevel gear 24 and the second bevel gear 25 are meshed and connected. When the second rotating shaft rotates slowly at a proper angle, since the rotating rod 23 is rotatably connected to the mounting groove 10, the first bevel gear 24 and the second bevel gear 25 are respectively fixedly connected to the second rotating shaft and the rotating rod 23, and the first bevel gear 24 and the second bevel gear 25 are meshed and connected. The diameter of the first bevel gear 24 is smaller than the diameter of the second bevel gear 25, so that the rotating rod 23 rotates slowly at a proper angle. After actual demonstration and calculation, the rotation angle of the rotating rod 23 is controlled between 60 degrees and 70 degrees to meet the rising and positioning of the telescopic plate 11.

[0029] Reference Figures 1 to 9 As shown, each swing assembly includes a turntable 26, a connecting rod 27, a rocker rod 28 and a first plug rod 29. The turntable 26 is fixedly arranged at one end of the rotating rod 23, the connecting rod 27 is hingedly arranged on the outer wall of the turntable 26, the rocker rod 28 is rotatably arranged inside the mounting groove 10, the first plug rod 29 is fixedly arranged at the end of the connecting rod 27 away from the turntable 26, and a second plug rod 30 is fixedly provided on the outer wall of each sliding column 15. The two ends of the rotating rod 23 are respectively provided with a first avoidance groove 31 and a second avoidance groove 32 for the first plug rod 29 and the second plug rod 30 to be inserted, and the outer wall of the guide rail 14 is provided with an avoidance notch for the second plug rod 30 to slide. When the rotating rod 23 rotates slowly to a proper angle, the turntable 26 is fixedly connected to the rotating rod 23, thereby driving the turntable 26 to rotate to a proper angle. Since the rocker rod 28 is rotatably connected to the mounting groove 10, the first plug rod 29 and the connecting rod The second lever 30 is moved upwards by the second lever 30 and the second lever 30 is moved upwards by the second lever 30.

[0030] Reference Figures 1 to 9As shown, two sliding rods 33 are slidably provided at both ends of the top of each guide rail 14, and a hemispherical buckle 34 and an anti-falling block 35 are fixed at both ends of each sliding rod 33. A groove 36 for the two hemispherical buckles 34 to shrink is provided on the outer wall of the guide rail 14, and a telescopic spring 37 is sleeved on the outer wall of each sliding rod 33. Two L-shaped blocks are symmetrically provided at both ends of the top of the guide rail 14, and each sliding rod 33 is plugged into an L-shaped block. A hemispherical card groove 38 for the two hemispherical buckles 34 to snap into is symmetrically provided on the outer wall of each sliding column 15. When the sliding column 15 rises on the guide rail 14, the bottom of the sliding column 15 contacts the hemispherical buckle 34, and the telescopic spring 37 changes from the initial state to the tight state. Under the action of the telescopic spring 37, the hemispherical buckles 34 are tightened. The spherical buckle 34 follows the slide rod 33 to retract into the inside of the groove 36. When the slide post 15 is in place, that is, when the slide post 15 drives the telescopic plate 11 to rise into place to fill the gap between the edge of the platform 48 and the subway door 46, the hemispherical groove 38 on the outer wall of the slide post 15 is aligned with the hemispherical buckle 34. At this time, the slide post 15 no longer resists the hemispherical buckle 34, and the telescopic spring 37 returns to its initial state from the tight state. Under the action of the telescopic spring 37, the hemispherical buckle 34 is automatically pushed into the inside of the hemispherical groove 38, thereby locking the slide post 15. This ensures that the telescopic plate 11 has a certain locking effect after it is in place, thereby improving the stability of the telescopic plate 11, thereby improving the safety of passengers stepping through, and improving the practicality of the device.

[0031] Reference Figures 1 to 9 As shown, four docking blocks 39 are symmetrically arranged on the inner wall of the mounting groove 10, and a threaded groove is provided on the outer wall of each docking block 39. A cover plate 40 is inserted on the open end of the mounting groove 10, and four bolts (not shown in the figure) are fixed at the four corners of the cover plate 40, and each bolt is threadedly connected to a threaded groove. By designing four docking blocks 39, the cover plate 40 is conveniently fixed to the open end of the mounting groove 10 by four bolts, thereby shielding the mounting groove 10, aligning the internal components to provide protection, and reducing noise. When the internal components fail, the cover plate 40 can be disassembled by removing the four bolts, thereby facilitating the inspection and maintenance of the internal components and improving the maintenance efficiency of the device.

[0032] Reference Figures 1 to 9 As shown, the top of the platform 48 is provided with a slide groove for two sliders 16 to slide, and an accordion protective cover 41 is provided between each slider 16 and a shielding door 17. Preferably, the accordion protective cover 41 is made of PVC material, which has excellent waterproof, wear-resistant and anti-aging properties, and can shield the slide groove, thereby having a certain shielding effect on the components inside the installation groove 10, preventing rain and snow on the top of the platform 48 from entering the interior of the installation groove 10 through the slide groove in rainy and snowy weather and causing rust on its internal components.

[0033] Reference Figures 1 to 9 As shown, a number of anti-skid pads 42 are inserted on the top of the telescopic plate 11, and each anti-skid pad 42 is made of rubber. Making each anti-skid pad 42 of rubber can increase the friction generated when passengers walk on the top of the telescopic plate 11, thereby preventing passengers from slipping in rainy and snowy weather and improving safety when passing.

[0034] Reference Figures 1 to 9 As shown, two lamp troughs are symmetrically provided on the top of the telescopic plate 11, and an LED lamp 43 is installed inside each lamp trough. A transparent lampshade 44 is fixed on the top of each lamp trough, and each lamp trough is used to install an LED lamp 43. The transparent lampshade 44 not only facilitates the light to pass through and has a lighting effect, but also facilitates passengers to accurately step on the telescopic plate 11 at night. At the same time, it has a protective effect on the LED lamp 43 inside the lamp trough, preventing moisture from entering the lamp trough and causing malfunction of the LED lamp 43, which is beneficial to extending its service life.

[0035] The working principle of the present invention is as follows: when the subway 47 arrives at the platform 48, the two subway 47 platform screen doors 17 are opened by the motor and the transmission device. The motor and the transmission device are existing technologies and are not described in detail here. When the two subway 47 platform screen doors 17 are opened, that is, when the two platform screen doors 17 move away from each other, each platform screen door 17 is slidably connected to the slide groove through the slider 16. Since one of the sliders 16 is fixedly connected to the top of the slide plate 12, the gear 19 is fixedly connected to the first rotating shaft, and the rack 18 is fixedly connected to the bottom of the slide plate 12, the gear 19 is meshed with the rack 18, thereby causing the gear 19 to rotate. Since the gear 19 and the driving wheel 20 are fixedly connected to the first rotating shaft, the driven wheel 21 is fixedly connected to the second rotating shaft, the driving wheel 20 and the driven wheel 21 are connected by a belt 22. In addition, the diameter of the driving wheel 20 is smaller than the diameter of the driven wheel 21, so that the second rotating shaft rotates slowly at an appropriate angle.

[0036] When the second rotating shaft rotates slowly to a suitable angle, since the rotating rod 23 is rotatably connected to the mounting groove 10, the first bevel gear 24 and the second bevel gear 25 are fixedly connected to the second rotating shaft and the rotating rod 23 respectively, and the first bevel gear 24 and the second bevel gear 25 are meshed and connected. The diameter of the first bevel gear 24 is smaller than the diameter of the second bevel gear 25, so that the rotating rod 23 rotates slowly to a suitable angle. After actual demonstration and calculation, the rotation angle of the rotating rod 23 is controlled between 60 degrees and 70 degrees to meet the rising and positioning of the telescopic plate 11.

[0037] When the rotating rod 23 rotates slowly to a proper angle, since the turntable 26 is fixedly connected to the rotating rod 23, the turntable 26 is driven to rotate to a proper angle. Since the rocker 28 is rotatably connected to the mounting groove 10, the first plug 29 is fixedly connected to the end of the connecting rod 27 away from the turntable 26. Each sliding column 15 is fixedly connected to a second plug 30. Therefore, the resistance force generated by the contact between the first plug 29 on the connecting rod 27 and the first avoidance groove 31 when the first plug 29 rotates is converted into a rotational force to drive the rocker 28, and then the rocker 28 is rotated by utilizing the second plug 30 to rotate. The resistance force generated by the second avoidance grooves 32 on the second plug rod 30 drives the second plug rod 30 to rise vertically. Since the second plug rod 30 is fixedly connected to one of the sliding columns 15, the sliding column 15 is slidingly connected to the guide rail 14, and each end of the telescopic plate 11 is fixedly connected to a sliding column 15, and further cooperates with another swing component to realize the upward sliding of the telescopic plate 11 into place, that is, by sliding the telescopic plate 11 up to the gap between the edge of the platform 48 and the subway door 46, it is convenient for passengers to step on the telescopic plate 11 to enter the interior of the subway 47 and prevent them from stepping on air and falling.

[0038] When the slide post 15 is in place, that is, the slide post 15 drives the telescopic plate 11 to rise and fill the gap between the edge of the platform 48 and the subway door 46, the hemispherical locking groove 38 on the outer wall of the slide post 15 is just aligned with the hemispherical locking groove 34. At this time, the slide post 15 no longer conflicts with the hemispherical locking buckle 34, and the telescopic spring 37 returns to its initial state from the tensile state. Under the action of the telescopic spring 37, the hemispherical locking buckle 34 is automatically pushed into the interior of the hemispherical locking groove 38, thereby locking the slide post 15, so that the telescopic plate 11 has a certain locking effect after it is in place, improving the stability of the telescopic plate 11, thereby improving the safety of passengers stepping through and improving the practicality of the device.

[0039] By designing four docking blocks 39, the cover plate 40 is conveniently fixedly connected to the open end of the mounting groove 10 by four bolts, thereby shielding the mounting groove 10, aligning the internal components to provide protection, and reducing noise. When the internal components fail, the cover plate 40 can be disassembled by removing the four bolts, thereby facilitating the inspection and maintenance of the internal components and improving the maintenance efficiency of the device.

[0040] Preferably, the accordion protective cover 41 is made of PVC material, which has excellent waterproof, wear-resistant and anti-aging properties. It can shield the slide groove, thereby having a certain shielding effect on the components inside the installation groove 10, preventing rain and snow on the top of the platform 48 from entering the interior of the installation groove 10 through the slide groove in rainy and snowy weather and causing rust on its internal components.

[0041] Each anti-slip pad 42 is made of rubber material, which can increase the friction generated when the passenger walks on the top of the telescopic plate 11, thereby preventing the passenger's feet from slipping in rainy and snowy weather and improving safety when passing.

[0042] Each lamp trough is used to install an LED lamp 43. The transparent lampshade 44 not only facilitates the light to pass through, achieving a lighting effect, and makes it convenient for passengers to accurately step on the telescopic plate 11 at night, but also protects the LED lamp 43 inside the lamp trough, preventing moisture from entering the lamp trough and causing malfunction of the LED lamp 43, which is beneficial to extending its service life.

Claims

1. An anti-drop telescopic device for a subway screen door, comprising a mounting groove (10) provided inside a subway platform, characterized in that: It also includes a telescopic plate (11), a traction mechanism and a jacking mechanism; The traction mechanism is arranged inside the installation groove (10), and the traction mechanism includes a slide plate (12), a transmission assembly and a first rotating assembly. The slide plate (12) is slidably arranged on the inner top of the installation groove (10) through two slide bars (13). The first rotating assembly is arranged inside the installation groove (10), and the transmission assembly is arranged between the slide plate (12) and the first rotating assembly. The lifting mechanism is arranged inside the mounting groove (10), and the lifting mechanism includes a second rotating assembly, two guide rails (14) and two swinging assemblies. The second rotating assembly is arranged inside the mounting groove (10), and the two guide rails (14) are fixed on the outer wall of the platform. Each swinging assembly is arranged between the second rotating assembly and one of the guide rails (14). A sliding column (15) is slidably provided on each guide rail (14), and the telescopic plate (11) is fixedly connected to the two sliding columns (15).

2. The anti-fall telescopic device for subway screen doors according to claim 1, characterized in that: The top of the platform is provided with two sliding blocks (16), and a screen door (17) is fixedly provided on the top of each slider (16). One of the sliders (16) is fixedly connected to the top of the slide plate (12). The transmission assembly includes a rack (18) and a gear (19). A first rotating shaft is provided inside the mounting groove (10), and the gear (19) is fixed on the first rotating shaft. The rack (18) is fixed at the bottom of the slide plate (12), and the gear (19) is meshed with the rack (18).

3. The anti-fall telescopic device for subway screen door according to claim 2, characterized in that: The first rotating assembly comprises a driving wheel (20), a driven wheel (21) and a belt (22); a second rotating shaft is rotatably provided at the inner bottom of the mounting groove (10); the driving wheel (20) and the driven wheel (21) are fixed on the first rotating shaft and the second rotating shaft respectively; and the belt (22) is sleeved between the driving wheel (20) and the driven wheel (21).

4. The anti-fall telescopic device for subway screen doors according to claim 3, characterized in that: The second rotating assembly includes a rotating rod (23), a first bevel gear (24) and a second bevel gear (25). The rotating rod (23) is rotatably arranged inside the mounting groove (10). The first bevel gear (24) and the second bevel gear (25) are fixedly arranged on the second rotating shaft and the rotating rod (23), respectively. The first bevel gear (24) and the second bevel gear (25) are meshed and connected.

5. The anti-fall telescopic device for subway screen door according to claim 4, characterized in that: Each swing assembly includes a turntable (26), a connecting rod (27), a rocker rod (28) and a first insertion rod (29), the turntable (26) is fixedly arranged at one end of the turntable (23), the connecting rod (27) is hingedly arranged on the outer wall of the turntable (26), the rocker rod (28) is rotatably arranged inside the mounting groove (10), the first insertion rod (29) is fixedly arranged at one end of the connecting rod (27) away from the turntable (26), a second insertion rod (30) is fixedly arranged on the outer wall of each slide column (15), a first avoidance groove (31) and a second avoidance groove (32) for the first insertion rod (29) and the second insertion rod (30) to be inserted are respectively provided at both ends of the turntable (23), and an avoidance notch for the second insertion rod (30) to slide is provided on the outer wall of the guide rail (14).

6. The anti-fall telescopic device for subway screen door according to claim 5, characterized in that: Two slide bars (33) are slidably provided at both ends of the top of each guide rail (14), and a hemispherical buckle (34) and an anti-drop block (35) are fixed at both ends of each slide bar (33). A groove (36) for the two hemispherical buckles (34) to shrink is provided on the outer wall of the guide rail (14), and a telescopic spring (37) is sleeved on the outer wall of each slide bar (33). Two L-shaped blocks are symmetrically provided at both ends of the top of the guide rail (14), and each slide bar (33) is plugged into an L-shaped block. A hemispherical card slot (38) for the two hemispherical buckles (34) to be clamped is symmetrically provided on the outer wall of each slide column (15).

7. The anti-fall telescopic device for subway screen door according to claim 6, characterized in that: Four docking blocks (39) are symmetrically arranged on the inner wall of the mounting groove (10), and a threaded groove is provided on the outer wall of each docking block (39). A cover plate (40) is inserted into the open end of the mounting groove (10), and four bolts are fixed at the four corners of the cover plate (40), and each bolt is threadedly connected to a threaded groove.

8. The anti-fall telescopic device for subway screen doors according to claim 7, characterized in that: A slide groove for two sliders (16) to slide is provided on the top of the platform, and an organ protective cover (41) is provided between each slider (16) and a screen door (17).

9. The anti-fall telescopic device for subway screen doors according to claim 8, characterized in that: A plurality of anti-skid pads (42) are inserted on the top of the telescopic plate (11), and each anti-skid pad (42) is made of rubber material.

10. The anti-fall telescopic device for subway platform screen door according to claim 9, characterized in that: Two light troughs are symmetrically arranged on the top of the telescopic plate (11), an LED lamp (43) is installed inside each light trough, and a transparent lampshade (44) is fixed on the top of each light trough.

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