Sectional door opening method for safety door

Abstract

The invention provides a safety door segmented opening method, which relates to the technical field of safety doors, and comprises the following steps: when a safety door is closed before a lifting part is lifted, the highest height of a first plate is greater than the highest height of a second plate; in a first period of time when the lifting part is lifted, the lifting speeds of the first plate and the second plate are the same; and in a second time period when the lifting part is subsequently lifted, the lifting speed of the second plate is greater than that of the first plate. The multiple plate bodies are connected with the pull rope to form the safety door, and each plate body independently ascends and descends; the multiple plate bodies are synchronously lifted in the first time period when the safety door is lifted, the situation that objects are clamped by mistake to cause hidden dangers is avoided, the second plate located on the lower portion is lifted at a high speed in the second time period when the lifting part is subsequently lifted, and therefore the safety door has enough protection height when falling down, the occupied height is small when the lifting part is lifted, and the safety door is high in safety.

Description

Technical Field

[0001] The present invention relates to the technical field of security doors, and in particular, the present invention relates to a method for opening a security door in sections. Background Art

[0002] With the development of cities, the demand for rail vehicles undertaking transportation functions between cities and suburbs is increasing day by day. Along with the diverse development trends in various regions, the actual demands for rail vehicles vary greatly. Subways within cities (including underground railways and overground urban railways), trains between cities (including bullet trains, high-speed rails, and ordinary trains), etc. These are collectively referred to as rail transit vehicles.

[0003] And there is a large flow of people on the platforms of these rail transit vehicles, and the rail transit runs at a high speed. It is necessary to set up screen doors at the platforms to separate the platform personnel from the rail vehicles to prevent the platform personnel from accidentally falling onto the platform and causing danger. For example, Chinese patent invention patent CN116517427A provides an intelligent screen door structure for a rail transit platform, which relates to the technical field of rail transit, including fixed columns and movable columns. There are telescopic grooves on the fixed columns, and limit sliding columns are arranged in the telescopic grooves. The movable column includes a main body plate, a lead screw, and a slider. A rotating roller and a conveyor belt are arranged at the upper end of the main body plate. The lead screw is provided with a first connector and a second connector. One end of the conveyor belt away from the first connector is connected to the slider, and a hook is arranged on the slider. There are at least two fixed columns and movable columns, so that a pull rope with the end fixed to the hook is connected between the movable columns on the two fixed columns. The above invention has a simple structure. By using a pull rope type screen door to lengthen the distance between the screen door columns, one screen door area corresponds to the doors of multiple types of trains, which meets the requirements of different opening positions of different trains, facilitates getting on and off passengers, and the two-stage lifting structure of the pull rope is stable. When the pull rope descends, it can effectively prevent people from falling onto the platform, with high safety.

[0004] There are many pull ropes in the above safety screen door, generally 8 horizontal pull ropes. During the entire process of the safety door rising and descending, if the distance between adjacent two (horizontal) pull ropes remains fixed (20 cm), and the safety door can form a safety protection height of at least 1.6 meters when descending, then it will cause the safety door to also occupy a height of 1.6 meters after rising. In this way, the height of the topmost pull rope from the ground is as high as 3.6 meters (the bottom pull rope needs to be 2 meters from the ground to facilitate passengers to pass), and there are high-voltage wires above the high-speed rail platform, posing a great safety hazard. Therefore, it is preferably designed that the distance between adjacent two pull ropes changes, so that when the safety door descends, the distance between adjacent two pull ropes is larger (20 cm), which can provide sufficient safety protection height, and after the safety door rises, the distance between adjacent two pull ropes becomes smaller, allowing passengers to pass under the pull ropes and reducing the height of the raised door body.

[0005] Therefore, the design of the drawstring safety door with variable drawstring spacing has received increasing attention. For example, Chinese Patent Invention CN116464383A provides a screen door structure for high-speed railway platforms, which relates to the technical field of rail transit. It includes several columns and drawstrings arranged between two adjacent columns. There is a lifting column on the column, a slider is arranged on the lifting column, a balance block is arranged on the column, a driving machine and a driving chain are arranged at the top of the column. One end of the driving chain is connected to the lifting column, and the end of the driving chain away from the lifting column is connected to the balance block; a rotating roller is arranged on the lifting column, a transmission belt is arranged on the rotating roller, one end of the transmission belt is connected to the slider, and the end of the transmission belt away from the slider is connected to the column. The present invention has a simple structure. The drawstring-type screen door can lengthen the distance between the columns, so that one screen door area can correspond to the doors of multiple types of trains, meeting the requirements of different train door opening positions, facilitating passengers to get on and off the train, and using the lifting of multiple sliders and multiple drawstrings. When the drawstrings are lowered, it can effectively prevent people from falling onto the platform, with high safety.

[0006] In the above safety door, when the lifting column rises, all the drawstrings will gather at the upper end of the lifting column; conversely, when the lifting column descends, the drawstrings are evenly distributed on the lifting column. It can be understood that the higher the lifting column rises, the smaller the (average) distance between the drawstrings, forming a multi-stage and multi-slider screen door lifting.

[0007] However, there are still serious defects in the above safety door. In the initial stage when the safety door rises, the distance between two adjacent drawstrings has already been reduced, making it possible for pedestrians or luggage to be gradually "clamped" and lifted by the drawstrings, posing a safety hazard; moreover, the structure of multiple groups of drawstring sliders is complex and prone to damage.

[0008] Therefore, to solve the above problems, it is necessary for us to design a reasonable and efficient method for the segmented opening of the safety door. Summary of the Invention

[0009] The purpose of the present invention is to provide a method for the segmented opening of a safety door. Multiple plates are connected to drawstrings to form a safety door, and each plate is independently lifted and operated; multiple plates are synchronously lifted in the first time period when the safety door rises, without accidentally clamping objects and causing potential hazards. In the second time period when the lifting part rises subsequently, the second plate located below accelerates upward, so that the safety door has a sufficient protection height when descending, occupies a small height when rising, and has high safety.

[0010] To achieve the above purpose, the following technical solutions are adopted in the present invention: A method for the segmented opening of a safety door, applicable to the segmented opening structure of a safety door. The structure includes a fixed column and a lifting part. The lifting part is provided with a first plate and a second plate driven independently, and safety door drawstrings are connected to both the first plate and the second plate; The method includes the following steps: When the safety door is closed before the lifting part rises, the highest height of the first plate is greater than the highest height of the second plate; within the first time period when the lifting part rises, the rising speeds of the first plate and the second plate are the same; Within the subsequent second time period when the lifting part rises, the rising speed of the second plate is greater than the rising speed of the first plate.

[0011] As a preference of the present invention, the first plate is fixedly installed on the lifting part; So that within the first time period and the second time period, the first plate rises synchronously with the lifting part.

[0012] As a preference of the present invention, a first slide rail for facilitating the sliding of the second plate is provided on the lifting part; So that within the first time period, the second plate rises synchronously with the lifting part; within the second time period, the second plate slides upward along the first slide rail, and the rising speed of the second plate is greater than the rising speed of the first plate.

[0013] As a preference of the present invention, a traction belt connected to the lifting part and a motor for driving the traction belt are provided on the fixed column; So that within the first time period and the second time period, the motor drives the lifting part to rise.

[0014] As a preference of the present invention, a connecting roller and a connecting belt connected to the connecting roller are provided on the main frame body, the connecting belt is connected to the second plate, and a functional block is provided at one end of the connecting belt away from the second plate; a second slide rail for facilitating the sliding of the functional block is provided on the fixed column; a limiting block is provided on the second slide rail; So that within the first time period, the functional block rises synchronously with the lifting part; Within the second time period, the functional block rises and abuts against the limiting block, and the connecting belt drives the second plate to slide upward along the first slide rail, so that the rising speed of the second plate is greater than the rising speed of the first plate.

[0015] As a preference of the present invention, a third plate is provided on the lifting part, a first matching roller coaxially connected to the connecting roller and a first matching belt for connecting the first matching roller and the third plate are provided on the main frame body; the outer diameter of the first matching roller is greater than the outer diameter of the connecting roller; So that within the first time period when the lifting part rises, the rising speeds of the first plate, the second plate and the third plate are the same; Within the second time period when the lifting part rises, the rising speed of the third plate is greater than the rising speed of the second plate, and the rising speed of the second plate is greater than the rising speed of the first plate.

[0016] As a preference of the present invention, a fourth plate is provided on the lifting part, and a second mating roller coaxially connected to the connecting roller and a second mating belt for connecting the second mating roller and the fourth plate are provided on the main frame body; the outer diameter of the second mating roller is smaller than that of the connecting roller; During the first time period when the lifting part rises, the first plate, the second plate and the fourth plate rise at the same speed; During the second time period when the lifting part rises, the rising speed of the fourth plate is less than that of the second plate.

[0017] As a preference of the present invention, before the lifting part rises, the height of the first plate is higher than that of the second plate; And after the lifting part finishes rising, the height of the first plate is equal to that of the second plate.

[0018] The beneficial effects of a method for opening a safety door in sections according to the present invention are as follows: A plurality of plates are connected with pull ropes to form a safety door, and each plate moves up and down independently; during the first time period when the safety door rises, the plurality of plates rise synchronously, so that no object will be accidentally clamped to cause potential hazards. During the subsequent second time period when the lifting part rises, the second plate located below accelerates to rise, so that the safety door has a sufficient protection height when descending, occupies a small height when rising, and has high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is an overall three-dimensional structure schematic diagram of an embodiment of a method for opening a safety door in sections according to the present invention; Figure 2 It is a three-dimensional structure schematic diagram of a fixed column in an embodiment of a method for opening a safety door in sections according to the present invention; Figure 3 It is a three-dimensional structure schematic diagram of a lifting part in an embodiment of a method for opening a safety door in sections according to the present invention; Figure 4 It is a rear view structure schematic diagram of a lifting part in an embodiment of a method for opening a safety door in sections according to the present invention; Figure 5 It is a top view structure schematic diagram of a part of the structure in an embodiment of a method for opening a safety door in sections according to the present invention; In the figure: 1, fixed column; 11, traction belt; 12, motor; 13, third slide rail; 14, second slide rail; 141, limit block; 15, counterweight block; 16, wing plate; 2, lifting part; 21, first plate; 22, second plate; 23, main frame body; 24, safety door pull rope; 241, tensioning adjustment block; 25, fourth plate; 26, mounting frame; 27, third plate; 231, connecting roller; 232, connecting belt; 233, functional block; 234, first mating roller; 235, second mating roller; 236, compensation roller; 237, first slide rail; 238, compensation belt; 239, sliding foot. Detailed implementation mode

[0020] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application.

[0021] In the following description, the terms "first" and "second" are only for the purpose of description and cannot be construed as indicating or implying relative importance. The following description provides multiple embodiments of the present application. Different embodiments can be replaced or combined, so the present application can also be considered to include all possible combinations of the same and / or different embodiments described. Thus, if one embodiment includes features A, B, and C, and another embodiment includes features B and D, then the present application should also be considered to include embodiments containing one or more all other possible combinations of A, B, C, and D, even though such embodiments may not be explicitly described in the following content.

[0022] The following description provides examples and does not limit the scope, applicability, or examples set forth in the claims. Changes can be made to the functions and arrangements of the described elements without departing from the scope of the content of the present application. Each example can appropriately omit, substitute, or add various processes or components. For example, the described method can be executed in a different order than the described order, and various steps can be added, omitted, or combined. In addition, the features described in some examples can be combined into other examples.

[0023] Embodiment 1: As Figures 1 to 4 shown, a method for opening a safety door in sections is applicable to a safety door sectional opening structure. The structure includes a fixed column 1 and a lifting part 2. An independently driven first plate 21 and a second plate 22 are arranged on the lifting part 2. Safety door pull ropes 24 are connected to both the first plate 21 and the second plate 22; the fixed column 1 is the door column of the platform door. The lifting part 2 arranged on the fixed column 1 is connected with a safety door pull rope 24. The two ends of the safety door pull rope 24 are respectively connected to the lifting parts 2 on two fixed columns 1 to form a pull rope safety door structure. The lifting part 2 rises and falls on the fixed column 1, that is, the safety door opens and closes. After the lifting part 2 rises on the fixed column 1, the safety door opens, facilitating passengers to pass under the safety door pull rope 24 for getting on and off the train when the train stops; conversely, after the lifting part 2 descends on the fixed column 1, that is, the safety door closes, blocking passengers from passing through, for safety protection when the train is running; The method includes the following steps: When the safety door is in the closed state before the lifting part rises, the highest height of the first plate is greater than the highest height of the second plate; within the first time period when the lifting part rises, the rising speeds of the first plate and the second plate are the same; During the second time period when the lifting part subsequently rises, the rising speed of the second plate is greater than that of the first plate.

[0024] It should be noted that before the lifting part 2 rises, the second plate 22 is located below the first plate 21; when the lifting part 2 rises to the highest point, the second plate 22 is approximately at the same height as the first plate 21. In this way, before the lifting part rises (i.e., when the safety door is closed), the first plate 21 and the second plate 22 are arranged vertically, jointly forming a safety door body with a relatively large height to prevent crossing; when the lifting part 2 rises to the highest point (i.e., when the safety door is opened), the second plate 22 approximately overlaps with the first plate 21, forming a relatively narrow and convergent door body that does not occupy too much space.

[0025] In this way, when the cable-pull safety door rises, it has two stages. The first stage is that the second plate 22 and the first plate 21 rise synchronously, that is, the two sets of cable-pull safety door body structures rise synchronously. At this time, the distance between any adjacent two sets of cables remains unchanged, and no objects will be accidentally clamped, with high safety. The second time period is after the lifting part 2 has risen for a certain time, and after the lower second plate 22 has risen to a relatively safe height, that is, the lowest cable has risen to a safe height (for example, 1.2 meters). At this time, the second plate 22 accelerates upward, and the rising speed of the second plate 22 is greater than that of the first plate 21, causing the two sets of cable-pull safety door body structures to overlap while rising.

[0026] Embodiment 2: Still as Figures 1 to 4 shown, which is only one of the embodiments of the present invention. On the basis of Embodiment 1, in a method for opening a safety door in sections, the first plate is fixedly installed on the lifting frame 23 of the lifting part 2; so that in the first time period and the second time period, the first plate 21 rises synchronously with the lifting frame 23 of the lifting part 2.

[0027] A first slide rail 237 for facilitating the sliding of the second plate 22 is provided on the lifting frame 23 of the lifting part 2; so that in the first time period, the second plate rises synchronously with the lifting part; in the second time period, the second plate slides upward along the first slide rail, and the rising speed of the second plate is greater than that of the first plate.

[0028] Moreover, a traction belt 11 connected to the main frame 23 and a motor 12 for driving the traction belt 11 are provided on the fixed column 1; a third slide rail 13 for facilitating the sliding of the main frame 23 is provided on the fixed column 1; so that the motor 12 drives the main frame 23 of the lifting part 2 to rise along the third slide rail 13; so that in the first time period and the second time period, the motor 12 drives the lifting part 2 to rise.

[0029] In particular, a connecting roller 231 and a connecting belt 232 connected to the connecting roller 231 are provided on the main frame body 23. The connecting belt 232 is connected to the second plate 22, and a functional block 233 is provided at one end of the connecting belt 232 away from the second plate 22. The connecting roller 231 is actually a pulley and is provided at the top of the main frame body 23. The connecting belt 232 is provided on the pulley, and both ends of the connecting belt 232 are respectively connected to the second plate 22 and the functional block 233. It can be understood that when the functional block 233 moves downward relative to the second plate 22, the second plate 22 will move upward relative to the second plate 22. Conversely, when the functional block 233 moves upward relative to the second plate 22, the second plate 22 will move downward relative to the second plate 22. A second sliding rail 14 for facilitating the sliding of the functional block 233 is provided on one side of the fixed column 1 close to the main frame body 23. A limiting block 141 is provided on the second sliding rail 14. The functional block 233 can slide up and down on the vertically arranged second sliding rail 14, and when the functional block 233 abuts against the limiting block 141 on the second sliding rail 14, it will no longer continue to displace. In fact, there are two limiting blocks 141, which respectively serve as the upper and lower end limiting blocks for the functional block 233 to slide along the second sliding rail 14. When the functional block 233 abuts against the lower limiting block 141, it can no longer continue to move downward, but can move upward. When the functional block 233 abuts against the upper limiting block 141, it can no longer continue to move upward, but can move downward.

[0030] So that within the first time period, the functional block 233 rises synchronously with the lifting part 2. Within the second time period, the functional block 233 rises and abuts against the limiting block 141, and the connecting belt 234 drives the second plate 22 to slide upward along the first sliding rail 237, so that the rising speed of the second plate is greater than the rising speed of the first plate.

[0031] That is to say, during the rising process of the functional block 233, the period before it abuts against the limiting block 141 is the first time period; the period after the functional block 233 abuts against the limiting block 141 is the second time period.

[0032] That is, within the first time period after the motor 12 drives the main frame body 23 to rise, the first plate 21 and the second plate 22 rise synchronously with the main frame body 23. Within the second time period after the main frame body 23 rises to a preset height such that the functional block 233 abuts against the limiting block 141 and the motor 12 drives the main frame body 23 to rise, the second plate 22 slides upward along the third sliding rail 237, and the rising speed of the second plate 22 is greater than the rising speed of the first plate 21.

[0033] Further explanation is as follows. The speed at which the lifting part 2 is driven by the motor 12 to rise through the traction belt 11 is v. In the first stage, the rising speeds of the second plate 22, the first plate 21, the functional block 233, and the main body frame 23 are all v. After the functional block 233 abuts against the upper limit block 141, the functional block 233 cannot move upward. At this time, the first plate 21 and the main body frame 23 still rise at a speed of v. The functional block 233 "moves downward" relative to the connecting roller 231 and the "downward movement" speed is v. Then the second plate 22 rises relative to the main body frame 23 at a speed of v. That is to say, the second plate 22 rises relative to the ground at a speed of 2v.

[0034] That is, in the first time period, the rising speeds of the first plate 21 and the second plate 22 are the same and equal to the rising speed of the main body frame 23. In the second time period, the rising speed of the first plate 21 is still equal to the rising speed of the main frame body 23, while the rising speed of the second plate 22 becomes twice the rising speed of the main frame body 23.

[0035] Embodiment 3, as Figures 1 to 5 shown, is only one of the embodiments of the present invention. On the basis of Embodiment 2, in a method for opening a safety door in sections of the present invention, a first matching roller 234 is coaxially connected to the connecting roller 231, and a third plate 27 is provided on the main frame body 23. The first matching roller 234 is connected to the third plate 27 through a first matching belt. The radius of the first matching roller 234 is greater than the radius of the connecting roller 231. The connecting roller 231 is connected to the first matching roller 234 through a coupling. After the functional block 233 abuts against the upper limit block 141, the "descending" of the functional block 233 drives the connecting roller 231 to rotate, thereby driving the rotation of the first matching roller 234. The first matching belt thereby drives the third plate 27 to move upward relative to the main frame body 23. And because the radius of the first matching roller 234 is greater than the radius of the connecting roller 231, when the lifting part 2 rises and the functional block 233 abuts against the limit block 141, the rising speed of the third plate 27 is greater than the rising speed of the second plate 22. That is, the rising speed of the third plate 27 in the second time period is greater than 2v.

[0036] So that in the first time period when the lifting part rises, the rising speeds of the first plate, the second plate, and the third plate are the same. In the second time period when the lifting part rises, the rising speed of the third plate is greater than the rising speed of the second plate, and the rising speed of the second plate is greater than the rising speed of the first plate.

[0037] When the entire platform safety door descends to the lowest position, the third plate 27 is located below the second plate 22. When the entire platform safety door rises to the highest position, the first plate 21, the second plate 22, and the third plate 27 overlap.

[0038] Of course, the number of the first matching rollers 234 and the third plate 27 is at least one. When there are multiple first matching rollers 234, the radii of the multiple first matching rollers 234 can also be set differently to form multiple third plates 27 with different speed rises and falls.

[0039] Obviously, a fourth slide rail for facilitating the sliding of the third plate 27 is also provided on the main frame 23.

[0040] That is to say, the first plate 21, the second plate 22, and the third plate 27 exist on the main body frame 23 at the same time, forming at least three groups of safety door body structures with different speed rises and falls.

[0041] Embodiment 4, as Figures 1 to 5 shown, is only one of the embodiments of the present invention. On the basis of Embodiment 2, different from Embodiment 3, in a method for opening a safety door in sections of the present invention, a second matching roller 235 is coaxially connected to the connecting roller 231, a fourth plate 25 is provided on the main frame 23, and the second matching roller 235 is connected to the fourth plate 25 through a first matching belt; the radius of the second matching roller 235 is smaller than the radius of the connecting roller 231; The connecting roller 231 is connected to the second matching roller 235 through a coupling. After the function block 233 abuts against the upper limit block 141, the "descending" of the function block 233 drives the connecting roller 231 to rotate, thereby driving the rotation of the second matching roller 235. The second matching belt thus drives the fourth plate 25 to move upward relative to the main frame 23. And because the radius of the second matching roller 235 is smaller than the radius of the connecting roller 231, when the lifting part 2 rises, after the function block 233 abuts against the limit block 141, the rising speed of the fourth plate 25 is less than the rising speed of the second plate 22; that is, the rising speed of the fourth plate 25 in the second time period is between the speeds of v and 2v.

[0042] So that in the first time period when the lifting part rises, the rising speeds of the first plate, the second plate, and the fourth plate are the same; In the second time period when the lifting part rises, the rising speed of the fourth plate is less than the rising speed of the second plate.

[0043] When the entire platform safety door descends to the lowest position, the fourth plate 25 is located between the second plate 22 and the first plate 21; when the entire platform safety door rises to the highest position, the first plate 21, the second plate 22, and the fourth plate 25 overlap.

[0044] Similarly, the number of the second matching rollers 235 and the fourth plates 25 is at least one. When there are multiple second matching rollers 235, the radii of the multiple second matching rollers 235 can also be set differently to form multiple fourth plates 25 with different speed rises and falls.

[0045] Obviously, a fifth slide rail for facilitating the sliding of the fourth plate 25 is also provided on the main frame 23.

[0046] That is to say, the first plate 21, the second plate 22 and the fourth plate 25 exist on the main body frame 23 at the same time, forming at least three sets of safety door body structures with different lifting speeds.

[0047] Embodiment 5, still as Figures 1 to 5 shown, is only one of the embodiments of the present invention. On the basis of Embodiment 2, different from Embodiments 4 and 3, in a method for opening a safety door in sections of the present invention, a connecting roller 231 is coaxially connected with a first matching roller 234 and a second matching roller 235. A third plate 27 and a fourth plate 25 are arranged on the main frame body 23. The first matching roller 234 is connected with the third plate 27 through a first matching belt; the radius of the first matching roller 234 is larger than the radius of the connecting roller 231; the second matching roller 235 is connected with the fourth plate 25 through a first matching belt; the radius of the second matching roller 235 is smaller than the radius of the connecting roller 231.

[0048] That is to say, the first plate 21, the second plate 22, the third plate 27 and the fourth plate 25 exist on the main body frame 23 at the same time, forming at least four sets of safety door body structures with different lifting speeds.

[0049] Embodiment 6, still as Figures 1 to 5 shown, is only one of the embodiments of the present invention. On the basis of Embodiment 4, in a method for opening a safety door in sections of the present invention, tension adjusting blocks 241 for connecting with a safety door pull rope 24 are arranged on both the first plate 21 and the second plate 22.

[0050] The tension adjusting blocks 241 are used to horizontally tighten or loosen the safety door pull rope 24, so that the safety door pull rope 24 is kept horizontally straight, preventing pedestrians from bending the safety door pull rope 24 and passing through between the two safety door pull ropes 24. In addition, two sets of tension adjusting blocks 241 are symmetrically arranged on both sides of the first plate 21 and / or the second plate 22. After the tension adjusting blocks 241 tighten the safety door pull rope 24, the tension of the safety door pull ropes 24 on both sides of the first plate 21 and / or the second plate 22 is relatively balanced, the left and right forces on the entire safety door column cancel each other out, and the service life is long and the safety is high.

[0051] If a third plate 27 is arranged on the main frame body 23, tension adjusting blocks 241 for connecting with the safety door pull rope 24 are also arranged on the third plate 27; if a fourth plate 25 is arranged on the main frame body 23, tension adjusting blocks 241 for connecting with the safety door pull rope 24 are also arranged on the fourth plate 25.

[0052] Sliding feet 239 for facilitating sliding on the third slide rail 13 are arranged on the main frame body 23, and the number of the sliding feet 239 is multiple.

[0053] The motor 12 is arranged on the top of the fixed column 1; the number of the traction belts 11 is two; preferably, a gear is arranged on the outer side of the output shaft of the motor 12, and the traction belt 11 is of a chain structure and performs chain drive with the gear, so as to drive the main frame body 23 to lift and lower.

[0054] A counterweight 15 is arranged at one end of the traction belt 11 far away from the main frame body 23; the counterweight 15 functions to counterweight the mass of the whole main frame body 23. When the main frame body 23 rises, the counterweight descends; on the contrary, when the main frame body 23 descends, the counterweight rises. After such counterweight, the power for the motor 12 to drive the main frame body 23 to lift and lower is effectively reduced.

[0055] Similarly, a gear is also arranged on the outer side of the connecting roller 231, and the connecting belt 232 is also a chain, which is convenient for chain drive; gears are also arranged on the outer sides of the first driven roller and the second driven roller, and the first driven belt and the second driven belt are also chains.

[0056] An installation frame 26 for connecting with the first plate 21, the second plate 22, the third plate 27 and the fourth plate 25 is arranged on the main frame body 23. Since the second plate 22, the third plate 27 and the fourth plate 25 all lift and lower independently, the third slide rail 237 for facilitating the sliding of the second plate 22, the fourth slide rail for facilitating the sliding of the third plate 27 and the fifth slide rail for facilitating the sliding of the fourth plate 25 should all be arranged in parallel. Then, at least three groups of vertically arranged columns are arranged on the installation frame 26, which are respectively used for installing the third slide rail, the fourth slide rail and the fifth slide rail, and the first plate 21 is directly fixedly installed on the installation frame 26.

[0057] In the present invention, wing plates 16 extending in a direction away from the main frame body 23 are arranged on both sides of the fixed column 1; at least a part of the counterweight 15 is located between the two wing plates 16. Due to the existence of multiple safety door body structures and the large thickness of the installation frame 26, arranging the counterweight 15 in the space surrounded by the C-shaped fixed column 1 can effectively reduce the thickness of the whole platform door upright column and facilitate the installation of the platform safety door structure outside the blind sidewalk.

[0058] Finally, the connecting roller 231 is arranged on the top of the main frame body 23; a compensation roller 236 is arranged at the lower end of the main frame body 23, and a compensation belt 238 for connecting with the second plate 22 is connected to the compensation roller 236; one end of the compensation belt far away from the second plate 22 is connected to the function block 233; that is, the connecting belt 232 and the compensation belt 238 form a complete ring, and the compensation belt 238 compensates for the stability of the operation of the connecting belt 232.

[0059] A second compensation roller connected to the first driven belt is arranged at the lower end of the main frame body 23 for cooperating with the first driven roller, and a third compensation roller connected to the second driven belt is arranged at the lower end of the frame body 23 for cooperating with the second driven roller.

[0060] A method for opening a safety door in sections according to the present invention. A plurality of plates are connected by a pulling rope to form a safety door, and each plate moves up and down independently. The plurality of plates are synchronously lifted in the first time period when the safety door is lifted, so that no object will be accidentally clamped to cause potential hazards. In the second time period when the lifting part is subsequently lifted, the second plate located below accelerates to rise, so that the safety door has a sufficient protection height when it descends, occupies a small height when it rises, and has high safety performance.

[0061] The present invention is not limited to the above specific embodiments, and various changes and modifications can be made to the present invention. Any modifications, equivalent replacements, improvements, etc. made to the above embodiments based on the technical essence of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for opening a safety door in sections, characterized in that, Applicable to the segmented door opening structure of a security door, the structure includes a fixed column and a lifting part. An independently driven first plate and a second plate are arranged on the lifting part, and security door pull ropes are connected to both the first plate and the second plate; The method includes the following steps: In the state where the security door is closed before the lifting part rises, the highest height of the first plate is greater than the highest height of the second plate; within the first time period when the lifting part rises, the rising speeds of the first plate and the second plate are the same; Within the subsequent second time period when the lifting part rises, the rising speed of the second plate is greater than the rising speed of the first plate.

2. A method for segmentally opening a security door according to claim 1, wherein: The first plate is fixedly installed on the lifting part; So that within the first time period and the second time period, the first plate rises synchronously with the lifting part.

3. A method for segmentally opening a security door according to claim 1, wherein: A first slide rail for facilitating the sliding of the second plate is arranged on the lifting part; So that within the first time period, the second plate rises synchronously with the lifting part; within the second time period, the second plate slides upward along the first slide rail, and the rising speed of the second plate is greater than the rising speed of the first plate.

4. A method for segmentally opening a security door according to claim 1, wherein: A traction belt connected to the lifting part and a motor for driving the traction belt are arranged on the fixed column; So that within the first time period and the second time period, the motor drives the lifting part to rise.

5. A method for segmentally opening a security door according to claim 4, wherein: A connecting roller and a connecting belt connected to the connecting roller are arranged on the main frame body. The connecting belt is connected to the second plate, and a functional block is arranged at one end of the connecting belt away from the second plate; a second slide rail for facilitating the sliding of the functional block is arranged on the fixed column; a limiting block is arranged on the second slide rail; So that within the first time period, the functional block rises synchronously with the lifting part; Within the second time period, the functional block rises and abuts against the limiting block, and the connecting belt drives the second plate to slide upward along the first slide rail, so that the rising speed of the second plate is greater than the rising speed of the first plate.

6. A method for segmentally opening a security door according to claim 4, wherein: A third plate is arranged on the lifting part, a first matching roller coaxially connected to the connecting roller and a first matching belt for connecting the first matching roller and the third plate are arranged on the main frame body; the outer diameter of the first matching roller is greater than the outer diameter of the connecting roller; So that within the first time period when the lifting part rises, the rising speeds of the first plate, the second plate and the third plate are the same; Within the second time period when the lifting part rises, the rising speed of the third plate is greater than the rising speed of the second plate, and the rising speed of the second plate is greater than the rising speed of the first plate.

7. A method for segmentally opening a security door according to claim 4, wherein: A fourth plate is arranged on the lifting part, a second matching roller coaxially connected to the connecting roller and a second matching belt for connecting the second matching roller and the fourth plate are arranged on the main frame body; the outer diameter of the second matching roller is smaller than the outer diameter of the connecting roller; During the first time period when the lifting part rises, the first plate, the second plate, and the fourth plate rise at the same speed; During the second time period when the lifting part rises, the rising speed of the fourth plate is less than that of the second plate.

8. A method for opening a safety door in sections according to claim 1, characterized in that: Before the lifting part rises, the height of the first plate is higher than that of the second plate; And after the lifting part finishes rising, the height of the first plate is equal to that of the second plate.

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