Segmented ascending pull rope safety door structure

Abstract

The invention provides a staged ascending pull rope safety door structure, and relates to the technical field of platform safety doors, the staged ascending pull rope safety door structure comprises a fixed column and a lifting part, and the lifting part comprises a main frame body and a mounting frame; a first roller and a second roller are arranged on the main frame body; the first roller is connected with a first belt, the second roller is connected with a second belt, and a sliding block is arranged on the first belt; a driving part, a first sliding rail and a second sliding rail are arranged on the fixed column; a limiting block is arranged on the second sliding rail; a first plate and a second plate are arranged on the mounting frame; the first plate and the second plate are both connected with safety door pull ropes. The multiple plate bodies are connected with the pull rope to form the safety door, the multiple plate bodies are synchronously lifted at the early stage of lifting of the safety door, and after the sliding block is lifted to the preset height, the second plate located on the lower portion ascends at a high speed, so that the safety door has enough protection height when descending, the occupied height is small when lifting, and hidden danger caused by mistakenly clamping an object is avoided; the whole structure is simple, not prone to damage and high in safety.

Description

Technical Field

[0001] The present invention relates to the technical field of platform screen doors. In particular, the present invention relates to a rope safety door structure that rises in sections. Background Art

[0002] With the development of cities, the demand for rail vehicles that undertake 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] Moreover, 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, the Chinese patent utility model patent CN1517427A provides a smart screen door structure for a rail transit platform, which relates to the technical field of rail transit. It includes fixed columns and movable columns. There are telescopic grooves provided 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. There are a rotating roller and a conveyor belt provided at the upper end of the main body plate. There are a first connection head and a second connection head provided on the lead screw. One end of the conveyor belt away from the first connection head is connected to the slider. There is a hook provided on the slider. There are at least two fixed columns and movable columns, such that a pull rope with the end fixed to the hook is connected between the movable columns on two fixed columns. The above utility model has a simple structure. By means of the rope-type screen door, the distance between the screen door columns is lengthened. One screen door area corresponds to the doors of multiple types of trains, meeting the requirements of different opening positions of different trains, facilitating 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 case, 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, such 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 a drawstring safety door with variable drawstring spacing has received increasing attention. For example, the Chinese utility model patent CN1464383A provides a screen door structure for high-speed rail platforms, which relates to the technical field of rail transit. It includes a number of columns and drawstrings arranged between adjacent columns. There are lifting columns on the columns, sliders on the lifting columns, balance weights on the columns, a driving machine and a driving chain at the top of the columns. One end of the driving chain is connected to the lifting column, and the end of the driving chain far from the lifting column is connected to the balance weight; there is a rotating roller on the lifting column, and 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 far from the slider is connected to the column. The present utility model 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-mentioned 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-mentioned safety door. At the initial stage when the safety door rises, the distance between adjacent drawstrings has already started to shrink, causing pedestrians or luggage to be gradually "clamped" and lifted by the drawstrings, posing a safety hazard; moreover, the multi-group drawstring slider structure is complex and prone to damage.

[0008] Therefore, to solve the above problems, it is necessary for us to design a reasonable and efficient drawstring safety door structure with segmented upward movement. Summary of the Invention

[0009] The purpose of the present invention is to provide a drawstring safety door structure with segmented upward movement. A number of plates are used to connect the drawstrings to form a safety door. The multiple plates rise synchronously at the initial stage when the safety door rises. After reaching the safety height, the plates located below accelerate to rise, so that when the safety door descends, it has sufficient protection height, occupies a small height when rising, and will not accidentally clamp objects to cause potential hazards. The whole structure is simple, not easy to be damaged, and has high safety.

[0010] To achieve the above object, the present invention is realized by adopting the following technical solutions: A structure of a pull - rope safety door with a segmented rising, including a fixed column and a lifting part for sliding on the fixed column, the lifting part including a main frame body and a mounting frame; a first roller and a second roller coaxially connected to the first roller are arranged on the main frame body; a first belt is connected to the first roller, a second belt is connected to the second roller, and a sliding block is arranged on the first belt; a driving part for driving the lifting of the main frame body, a first slide rail for facilitating the sliding of the main frame body, and a second slide rail for facilitating the sliding of the sliding block are arranged on the fixed column; a limiting block is arranged on the second slide rail; a first plate fixedly installed and a second plate for connecting with the second belt are arranged on the mounting frame; safety door pull - ropes are connected to both the first plate and the second plate. Before the main frame body rises along the fixed column, the height of the second plate is lower than that of the first plate, that is, the second plate is located below the first plate. When the lifting part rises, the first plate and the second plate rise synchronously with the lifting part. After the sliding block abuts against the limiting block, the first belt drives the second plate to slide upward, so that the rising speed of the second plate is greater than that of the first plate. And when the lifting part rises to the highest point, the second plate and the first plate are approximately at the same height.

[0011] As a preference of the present invention, the driving part includes a traction belt connected to the main frame body and a motor for driving the traction belt.

[0012] As a preference of the present invention, a counterweight block is arranged at one end of the traction belt away from the main frame body.

[0013] As a preference of the present invention, the second roller includes at least two coaxially arranged roller bodies, and a chain - shifting plate is arranged at the second roller.

[0014] As a preference of the present invention, the outer diameters of the multiple roller bodies are all different.

[0015] As a preference of the present invention, a limit - adjusting rod for adjusting the position of the limiting block is arranged on the fixed column.

[0016] As a preference of the present invention, a third slide rail for facilitating the sliding of the second plate is arranged on the mounting frame.

[0017] As a preference of the present invention, connecting feet for connecting with the second belt are arranged on the second plate.

[0018] As a preference of the present invention, both the first roller and the second roller are arranged at the top of the main frame body; the first belt is connected to a first compensating roller, and the second belt is connected to a second compensating roller.

[0019] Preferably, tension adjusting blocks for connecting with the safety door pull rope are arranged on both the first plate and the second plate.

[0020] Preferably, the traction belt, the first belt and the second belt are all chains.

[0021] The beneficial effects of the sectional ascending pull - rope safety door structure of the present invention are as follows: A safety door is formed by connecting a plurality of plates to a pull rope. The plurality of plates rise synchronously at the initial stage of the rising of the safety door, and the plates located below accelerate to rise after reaching the safe height, so that the safety door has a sufficient protection height when descending, occupies a small height when rising, and will not accidentally pinch objects to cause potential hazards. The whole structure is simple, not easily damaged, and has high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic perspective view of the overall structure of an embodiment of the sectional ascending pull - rope safety door structure of the present invention; Figure 2 It is a schematic perspective view of the fixed column in an embodiment of the sectional ascending pull - rope safety door structure of the present invention; Figure 3 It is a schematic perspective view of the lifting part in an embodiment of the sectional ascending pull - rope safety door structure of the present invention; Figure 4 It is a schematic view of the structure of the first belt and the second belt in an embodiment of the sectional ascending pull - rope safety door structure of the present invention; Figure 5 It is a schematic view of the structure of the first belt and the second belt in another embodiment of the sectional ascending pull - rope safety door structure of the present invention; In the figure: 1. Fixed column, 11. Traction belt, 12. Motor, 13. First slide rail, 14. Second slide rail, 141. Limit block, 15. Counterweight, 2. Lifting part, 21. First plate, 22. Second plate, 23. Main frame body, 24. Safety door pull rope, 241. Tension adjusting block, 25. Sliding block; 26. Mounting frame, 231. First roller, 232. Second roller, 233. First belt, 234. Second belt, 235. Chain - shifting plate, 236. First compensation roller, 261. Second compensation roller, 221. Connecting foot, 261. Third slide rail. DETAILED DESCRIPTION OF THE INVENTION

[0023] The following are specific embodiments of the present invention, which further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0024] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that: unless otherwise specifically stated, the relative arrangements and steps of the modules and steps set forth in these embodiments do not limit the scope of the present invention.

[0025] Meanwhile, it should be understood that for the sake of convenience in description, the processes in the accompanying drawings do not merely proceed separately, but multiple steps cross each other.

[0026] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the products of the present invention are customarily placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0027] The following description of at least one exemplary embodiment is actually merely illustrative and in no way restricts the present invention or its application or use.

[0028] Technologies, methods, and systems known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and systems should be regarded as part of the specification of this application.

[0029] Embodiment 1: As Figures 1 to 4 shown, it is merely one embodiment of the present invention. A drawstring safety door structure with a segmented rise includes a fixed column 1 and a lifting part 2 for sliding on the fixed column 1. The lifting part 2 includes a main frame body 23 and a mounting frame 26; a first roller 231 and a second roller 232 coaxially connected to the first roller 231 are provided on the main frame body 23; a first belt 233 is connected to the first roller 231, a second belt 234 is connected to the second roller 232, and a sliding block 25 is provided on the first belt 233; a driving part for driving the main frame body 23 to lift, a first slide rail 13 for facilitating the sliding of the main frame body 23, and a second slide rail 14 for facilitating the sliding of the sliding block 24 are provided on the fixed column 1; a limiting block 141 is provided on the second slide rail 14; a first plate 21 fixedly installed and a second plate 22 for connecting with the second belt 234 are provided on the mounting frame 26; safety door drawstrings 24 are connected to both the first plate 21 and the second plate 22; In the present invention, the fixed column 1 is the door column of the platform screen door. The lifting part 2 provided on the fixed column 1 is connected with a safety door pull rope 24. Both ends of the safety door pull rope 24 are respectively connected to the lifting parts 2 on two fixed columns 1, forming a pull rope safety door structure. When the lifting part 2 rises on the fixed column 1, that is, the safety door rises, which is convenient for passengers to pass under the safety door pull rope 24 and is used for getting on and off the train when the train stops. On the contrary, after the lifting part 2 descends on the fixed column 1, that is, the safety door closes, blocking passengers from passing through, and is used for safety protection when the train is running.

[0030] First, it is the structure of the fixed column 1. A driving part for driving the lifting of the main frame 23 and a first slide rail 13 for facilitating the sliding of the main frame 23 are provided on the fixed column 1. That is to say, when the driving part works, it drives the main frame 23 to move up and down along the first slide rail 13 to complete the opening and closing of the safety door. When the main frame 23 rises, the safety door opens, and when the main frame 23 descends, the safety door closes.

[0031] Then, it is the structure of the lifting part 2. The lifting part 2 includes a main frame 23 and a mounting frame 26. A first plate 21 fixedly installed and a second plate 22 for connecting with the second belt 234 are provided on the mounting frame 26. The main frame 23 is the main part of the lifting part 2, and the mounting frame 26 is used for installing the safety door plate body. The first plate 21 is fixedly installed on the mounting frame 26, while the second plate 22 is movably installed on the mounting frame 26 and can slide up and down. The height of the second plate 22 is not higher than that of the first plate 21. Safety door pull ropes 24 are connected to both the first plate 21 and the second plate 22. It can be understood that the first plate 21 and the second plate 22 form two relatively independent pull rope safety door body structures.

[0032] The connection relationship of the second plate 22 is as follows: A first roller 231 and a second roller 232 coaxially connected with the first roller 231 are provided on the main frame 23. The first roller 231 is connected with a first belt 233, the second roller 232 is connected with a second belt 234, and a sliding block 25 is provided on the first belt 233. A second slide rail 14 for facilitating the sliding of the sliding block 24 is provided on the fixed column 1. A limiting block 141 is provided on the second slide rail 14. The second plate 22 is connected with the second belt 234.

[0033] That is to say, the first roller 231 and the second roller 232 form a pulley structure. When the sliding block 25 moves downward relative to the main frame 23, the second plate 22 will move upward relative to the main frame 23. On the contrary, when the sliding block 25 moves upward relative to the main frame 23, the second plate 22 will move downward relative to the main frame 23.

[0034] It should be noted that the mass of the sliding block 25 is less than that of the second plate 22. That is, when neither the sliding block 25 nor the second plate 22 is subject to a driving force, the second plate 22 will naturally descend under the action of gravity, driving the sliding block 25 to move upward.

[0035] The setting of the sliding block 25 is also limited. A second slide rail 14 for facilitating the sliding of the sliding block 25 is provided on the fixed column 1; a limiting block 141 is provided on the second slide rail 14; that is to say, the sliding block 25 can slide up and down on the vertically arranged second slide rail 14, and when the sliding block 25 abuts against the limiting block 141 on the second slide rail 14, it will no longer continue to displace; actually, there are two limiting blocks 141, which respectively serve as the upper and lower end limiting blocks for the sliding block 25 to slide along the second slide rail 14. When the sliding block 25 abuts against the lower limiting block 141, it can no longer continue to displace downward, but can displace upward; when the sliding block 25 abuts against the upper limiting block 141, it can no longer continue to displace upward, but can displace downward.

[0036] Based on the above structure, when the rope-pulling safety door structure of the present invention that rises in segments is in operation (opening the door upward), it is specifically as follows: Before the lifting part 2 rises, the second plate 22 is located below the first plate 21, and the two safety door bodies just form a complete rope-pulling safety door to block passengers from passing through; When driving the lifting part 2 to rise, within the first time period before the lifting part rises to the preset height, the first plate 21 and the second plate 22 rise synchronously with the lifting part 2; since the mass of the second plate 22 is greater than that of the sliding block 25, the sliding block 25 actually also rises synchronously with the lifting part 2. At this time, the sliding block 25 also rises along the second slide rail 14; After the sliding block 25 rises along the second slide rail 14 until it abuts against the upper limiting block 141, that is, within the second time period after the lifting part rises to the preset height, the sliding block 25 cannot continue to displace upward, and at this time the entire main body frame 23 is still rising. For the structure of the main body frame 23, the sliding block 25 "moves downward" relative to the first roller 231, thereby driving the second plate 22 to move upward on the main body frame 23; that is, the second belt 234 drives the second plate 22 to slide upward, so that the rising speed of the second plate 22 is greater than that of the first plate 21; Finally, when the motor 12 drives the lifting part 2 to rise to the highest point, the second plate 22 is approximately at the same height as the first plate 21, that is, the second plate 22 overlaps with the first plate 21, reducing the occupied height after the safety door rises.

[0037] In summary, when the pull - rope safety door rises, it has two stages. In the first stage, the second plate 22 rises synchronously with the first plate 21, that is, the door body structures of the two groups of pull - rope safety doors rise synchronously. At this time, the distance between any two adjacent groups of pull - ropes remains unchanged, and objects will not be accidentally clamped, with high safety. In the second stage, after the sliding block 25 abuts against the upper limit block 141, at this time, the lowest pull - rope has risen to the safety height (for example, 1.2 meters), and the rising speed of the second plate 22 is greater than that of the first plate 21, causing the door body structures of the two groups of pull - rope safety doors to overlap while rising.

[0038] It should be further noted that when the pull - rope safety door descends, it also has two stages. When the motor 12 starts to drive the lifting part 2 to descend, since the mass of the second plate 22 is greater than the mass of the sliding block 25, the first plate 21 descends with the main body frame 23, and the second plate 22 will slide downward along the third slide rail 261 under the action of gravity until the second plate 22 is displaced to the lower limit of the third slide rail 261; then the first plate 21, the second plate 22 and the sliding block 25 descend synchronously with the main body frame 23.

[0039] That is to say, the differential lifting between the first plate 2 and the second plate 22 all occurs above the safety height. Below the safety height, the first plate 2 and the second plate 22 lift synchronously, effectively avoiding pinching passengers or damaging items.

[0040] A pull - rope safety door structure with segmented rising of the present invention uses multiple plates to connect the pull - ropes to form a safety door. The multiple plates rise synchronously in the initial stage of the rising of the safety door. After rising to the safety height, the plate located below accelerates to rise, so that when the safety door descends, it has a sufficient protection height, occupies a small height when rising, and will not accidentally clamp objects to cause potential hazards. The whole structure is simple, not easily damaged, and has high safety.

[0041] Embodiment 2, as Figures 1 to 5 shown, is only one of the embodiments of the present invention. On the basis of Embodiment 1, in a pull - rope safety door structure with segmented rising of the present invention, a limit - adjusting rod for adjusting the position of the limit block 141 is provided on the fixed column 1. The limit - adjusting rod extends parallel to the second slide rail, and the limit - adjusting rod extends from the side far from the limit block to the side close to the limit block, so as to telescopically adjust the position of the limit block 141, so that the "preset height" at which the sliding block abuts against the limit block can be adjusted. And the preset height is adjustable, and the rising speed of the second plate in the second time period is adjusted according to the change of the preset height; When the preset height is adjusted to become larger, the rising speed of the second plate in the second time period becomes smaller; conversely, when the preset height is adjusted to become smaller, the rising speed of the second plate in the second time period becomes larger.

[0042] After the sliding block 25 abuts against the upper limit block 141, the rising speeds of the first plate 21 and the second plate 22 are calculated as follows: Taking the rising speed of the lifting part 2 as v, then regardless of whether the sliding block 25 abuts against the upper limit block 141 or not, the rising speed of the first plate 21 is the same as that of the lifting part 2, which is v; Before the sliding block 25 abuts against the upper limit block 141, the rising speed of the second plate 22 is also the same as that of the lifting part 2, which is v; After the sliding block 25 abuts against the upper limit block 141, the sliding block 25 "slides downward" relative to the lifting part 2 at a speed of v; at this time, the transmission speed of the first belt 233 is v, and the transmission speed of the second belt 234 is n*v, where n is the ratio of the radius of the second roller 232 to the radius of the first roller 231 (the angular velocities of the first roller and the second roller are the same, and the linear velocity is proportional to the radius), that is, the rising speed of the second plate 22 is n*v + v, that is, (1 + n)*v.

[0043] The second roller 232 includes at least two coaxially arranged roller bodies, and a chain deflecting plate 235 is arranged at the second roller 232.

[0044] The outer diameters of the multiple roller bodies are all different. Preferably, there are three roller bodies, which are respectively denoted as the first roller body, the second roller body, and the third roller body. The radius of the first roller body is smaller than the radius of the first roller 231 (n is less than 1), the radius of the second roller body is equal to the radius of the first roller 231 (n is equal to 1), and the radius of the third roller body is larger than the radius of the first roller 231 (n is greater than 1).

[0045] After the sliding block 25 abuts against the upper limit block 141, when the second belt 234 is deflected by the chain deflecting plate 235 to the first roller body for transmission, the rising speed of the second plate 22 is between v and 2v; when the second belt 234 is deflected by the chain deflecting plate 235 to the second roller body for transmission, the rising speed of the second plate 22 is 2v; when the second belt 234 is deflected by the chain deflecting plate 235 to the third roller body for transmission, the rising speed of the second plate 22 is greater than 2v.

[0046] In actual use, when the preset height is adjusted to increase, that is, when the limit adjusting rod adjusts the upper limit block above the second slide rail to a higher position, the rising speed of the second plate in the second time period becomes smaller, that is, the chain deflecting plate 235 deflects the second belt 234 to the roller body with a smaller diameter; conversely, when the preset height is adjusted to decrease, the rising speed of the second plate in the second time period becomes larger.

[0047] Embodiment 3, as Figures 1 to 5The figure shown is only one embodiment of the present invention. Based on any of the above embodiments, in a segmented rising pull-rope safety door structure of the present invention, the driving part includes a traction belt 11 connected to the main frame 23 and a motor 12 for driving the traction belt 11.

[0048] A counterweight 15 is provided at one end of the traction belt 11 away from the main frame 23. The counterweight 15 serves to counterweight the mass of the entire main frame 23. When the main frame 23 is raised, the counterweight 15 descends; conversely, when the main frame 23 is lowered, the counterweight 15 rises. After counterweighting, the power of the motor 12 driving the main frame 23 to rise and fall is effectively reduced.

[0049] The mounting frame 26 is provided with a third slide rail 261 for facilitating the sliding of the second plate 22 , so that the sliding of the second plate 22 is more stable.

[0050] Furthermore, the second plate 22 is provided with a connecting foot 221 for connecting with the second belt 234 .

[0051] In addition, the first roller 231 and the second roller 232 are both arranged on the top of the main frame 23; the first belt 233 and the second belt 234 are both annular belts, the first belt 233 is connected to the first compensation roller 236, and the second belt 234 is connected to the second compensation roller 237. In fact, the second belt 234 is also connected to a tensioning roller for tightening the second belt 234 when the second belt 234 is shifted by the chain plate 235.

[0052] In addition, the traction belt 11, the first belt 233 and the second belt 234 are all chains; the first roller and the second roller are both gear rollers, and a gear is also provided on the output shaft of the motor 12, so that the traction belt 11, the first belt 233 and the second belt 234 are all gear chain transmission.

[0053] Finally, the first plate 21 and the second plate 22 are both provided with a tensioning adjustment block 241 for connecting with the safety door rope 24; the tensioning adjustment block 241 is used to horizontally tighten or loosen the safety door rope 24, so that the safety door rope 24 remains horizontally straightened to prevent pedestrians from bending the safety door rope 24 and passing between the two safety door ropes 24. In addition, two groups of tensioning adjustment blocks 241 are symmetrically arranged on both sides of the first plate 21 and / or the second plate 22, so that after the tensioning adjustment block 241 tightens the safety door rope 24, the tension of the safety door rope 24 on both sides of the first plate 21 and / or the second plate 22 is relatively balanced, and the forces on the left and right of the entire safety door column offset each other, with a long service life and high safety.

[0054] The present invention is not limited to the above specific embodiments, and various modifications and variations can be made to the present invention. Any modification, equivalent replacement, improvement, 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 structure of a pull - rope safety door with a segmented rising feature, characterized in that: It includes a fixed column (1) and a lifting part (2) for sliding on the fixed column (1). The lifting part (2) includes a main frame body (23) and a mounting frame (26); a first roller (231) and a second roller (232) coaxially connected to the first roller (231) are arranged on the main frame body (23); a first belt (233) is connected to the first roller (231), a second belt (234) is connected to the second roller (232), and a sliding block (25) is arranged on the first belt (233); a driving part for driving the lifting of the main frame body (23), a first slide rail (13) for facilitating the sliding of the main frame body (23), and a second slide rail (14) for facilitating the sliding of the sliding block (24) are arranged on the fixed column (1); a limiting block (141) is arranged on the second slide rail (14); a first plate (21) fixedly installed and a second plate (22) for connecting with the second belt (234) are arranged on the mounting frame (26); safety door pull ropes (24) are connected to both the first plate (21) and the second plate (22). Before the main frame body (23) rises along the fixed column (1), the height of the second plate (22) is lower than that of the first plate (21).

2. The structure of a pull cord safety door with segmented upward movement according to claim 1, characterized in that: The driving part includes a traction belt (11) connected to the main frame body (23) and a motor (12) for driving the traction belt (11).

3. The structure of a pull - rope safety door with segmented upward movement according to claim 2, wherein: A counterweight block (15) is arranged at one end of the traction belt (11) away from the main frame body (23).

4. A structure of a pull - rope safety door with a segmented upward movement, as described in claim 1, wherein: The second roller (232) includes at least two coaxially arranged roller bodies, and a chain deflecting plate (235) is arranged at the second roller (232).

5. The structure of a drawstring safety door with a segmented upward movement according to claim 4, characterized in that: The outer diameters of the multiple roller bodies are all different.

6. The structure of a pull cord safety door with a segmented rising type according to claim 1, characterized in that: A limit adjusting rod for adjusting the position of the limiting block (141) is arranged on the fixed column (1).

7. A structure of a pull - rope safety door with a segmented upward movement, as described in claim 1, wherein: A third slide rail (261) for facilitating the sliding of the second plate (22) is arranged on the mounting frame (26).

8. A pull cord safety door structure with a segmented upward rise according to claim 1, characterized in that: Connecting feet (221) for connecting with the second belt (234) are arranged on the second plate (22).

9. The structure of a pull - rope safety door with a segmented upward movement according to claim 1, wherein: Both the first roller (231) and the second roller (232) are arranged at the top of the main frame body (23); a first compensation roller (236) is connected to the first belt (233), and a second compensation roller (237) is connected to the second belt (234).

10. A pull - rope safety door structure with a segmented upward movement, as described in claim 1, wherein: Tension adjusting blocks (241) for connecting with the safety door pull ropes (24) are arranged on both the first plate (21) and the second plate (22).

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