Linear guide rail center-opening double-folding landing door device

Abstract

The invention relates to the technical field of center-opening double-folding landing doors, in particular to a linear guide rail center-opening double-folding landing door device which comprises a body, a sill, a slow door assembly, a shutter assembly, a door plate assembly, a reset assembly and a lock hook assembly, the door plate assembly comprises a slow door plate and a shutter door plate, and a linear guide rail and a double-R guide rail are installed on the body; the slow door assembly comprises a left slow door sliding plate and a right slow door sliding plate which can slide reversely along the double-R guide rail, and a slow door plate is installed below the left slow door sliding plate and the right slow door sliding plate. The shutter assembly comprises a left shutter sliding plate and a right shutter sliding plate which are fixedly connected with a sliding block on the linear guide rail and can slide reversely along the linear guide rail, and a shutter door plate is installed below the shutter assembly. The left slow door sliding plate and the right slow door sliding plate are lengthened and provided with inclined long holes, gaps between the sliding plates and the double-R guide rail can be adjusted, and operation stability is improved. The device is compact in structure, is suitable for the large door opening requirement of a small shaft, has a reset function and multiple emergency unlocking modes, and improves the stability and safety of elevator operation.

Description

A linear guide rail split double-fold door device Technical Field

[0001] This invention relates to the field of split double-fold doors, and particularly to a linear guide rail split double-fold door device. Background Technology

[0002] In actual building construction and elevator installation, due to environmental factors such as building space layout and shaft size, elevators in many scenarios need to adopt a center-parted double-fold small-opening door structure with a small door spacing.

[0003] Existing center-parting double-folding small-opening landing door devices mostly adopt a traditional double-guide rail design, with the fast-door mounting plate and slow-door mounting plate respectively mounted on conventional guide rails. Due to the limitation of the door opening distance, the door panel is narrow and lightweight, and the width of the door sliding plate connected to it is also strictly constrained, which makes the door body prone to overall shaking during operation and poor operational stability. At the same time, the narrow door sliding plate makes the door panel prone to tilting when encountering external resistance in all working conditions, including closing, running, and opening. After the resistance is removed, the door panel cannot return to its original position on its own, directly resulting in excessive door gaps. This not only obstructs the operation of the door operator and frequently causes elevator malfunctions, but also reduces the reliability and safety of the elevator.

[0004] Existing traditional split double-fold door devices are difficult to improve the door opening distance in small shaft spaces, and cannot meet the actual use needs of large door opening distance in small shaft scenarios, resulting in poor scenario adaptability. In addition, the traditional guide rails have insufficient running precision and wear resistance, and the fit gap is not adjustable, which aggravates the shaking and jamming problems of the door operation. The defects in the overall structural design make the existing devices significantly inadequate in terms of operational stability, safety of use and scenario adaptability.

[0005] Therefore, there is an urgent need for a centrally split double-fold door device with an optimized structure to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a linear guide rail split double-fold door device to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides a linear guide rail-mounted double-fold door device, comprising a body, a sill, a slow shutter assembly, a fast shutter assembly, a door panel assembly, a reset assembly, and a locking hook assembly. A slider is disposed below the door panel assembly, and the sill has a groove adapted to the gap between the slider and the slider, allowing the slider to slide along the groove. The fast shutter assembly and the slow shutter assembly are linked through a first transmission assembly and a second transmission assembly. The door panel assembly includes a slow shutter door panel and a fast shutter door panel. A linear guide rail and a double-R guide rail are fixedly mounted on the body. The slow shutter assembly includes a left slow shutter sliding plate and a right slow shutter sliding plate. The shutter assembly includes a left and right shutter slide plate, both of which cooperate with a double R-rail and slide in opposite directions. The slow shutter door plate is installed below the left and right slow shutter slide plates. The shutter assembly includes a left and right shutter slide plate, both of which are fixedly connected to a slider on a linear guide rail and can slide in opposite directions along the linear guide rail. The shutter door plate is installed below the left and right shutter slide plates. The locking hook assembly includes a lock body and a locking hook that hooks into the lock body. The lock body and the locking hook are respectively fixedly installed on the left and right shutter slide plates.

[0008] Preferably, the first transmission assembly includes a first left small rope pulley, a second left small rope pulley, a left small steel wire rope, a first right small rope pulley, a second right small rope pulley, and a right small steel wire rope. The first left small rope pulley and the second left small rope pulley are respectively fixed to the left and right sides of the upper end of the left slow shutter slide. The left small steel wire rope is wound around the first left small rope pulley and the second left small rope pulley, and one side of the left small steel wire rope is connected to the left fast shutter slide, while the other side is fixedly connected to the body through a pressure block. The first right small rope pulley and the second right small rope pulley are respectively fixed to the left and right sides of the upper end of the right slow shutter slide. The right small steel wire rope is wound around the first right small rope pulley and the second right small rope pulley, and one side of the right small steel wire rope is connected to the right fast shutter slide, while the other side is fixedly connected to the body through a pressure block.

[0009] Preferably, the second transmission assembly includes a left large rope pulley, a right large rope pulley, and a large steel wire rope. The left and right large rope pulleys are arranged symmetrically and are both fixed to the body by screws. The large steel wire rope is wound around the left and right large rope pulleys, and one side of the large steel wire rope is fixedly connected to the left shutter slide plate, and the other side is fixedly connected to the right shutter slide plate.

[0010] Preferably, both the left and right slow shutter slides are fixedly equipped with two upper pulleys, and both are detachably connected to two first lower pulleys via nuts. The upper pulleys and first lower pulleys slide in cooperation with the double R guide rail. The left and right slow shutter slides are provided with inclined elongated holes. By adjusting the installation position of the first lower pulleys in the inclined elongated holes, the gap between the first lower pulleys and the double R guide rail can be adjusted.

[0011] Preferably, the left and right shutter slides are fixedly connected to the slider on the linear guide rail by countersunk screws and welded to prevent displacement due to external forces; the lower ends of the left and right shutter slides are each equipped with two second sliding rollers, which are in close contact with the linear guide rail; the surface of the second sliding rollers is made of plastic material to ensure smooth operation, reduce noise, and prevent the door panel from tilting when subjected to external impact.

[0012] Preferably, the reset component is a reset spring, one end of which is connected to the left shutter slide plate, and the other end is connected to the main body.

[0013] Preferably, the reset component is a reset hammer, and a reset pulley is fixedly installed on one side of the main body. The reset hammer includes a hammer component and a hammer wire rope. One end of the hammer wire rope is connected to the hammer component, and the other end passes around the reset pulley and is fixedly connected to the left shutter slide plate.

[0014] Preferably, the left shutter slide and the right shutter slide are provided with adjusting components for adjusting the tension of the large steel wire rope, the first small steel wire rope, or the second small steel wire rope.

[0015] Preferably, both the left and right slow shutter slides are designed to be longer to eliminate wobbling during slide operation.

[0016] Preferably, the device further includes an emergency unlocking mechanism, which is a lintel lock or a door panel lock.

[0017] Therefore, the present invention provides a linear guide rail split double-fold floor door device, which has the following beneficial effects: This device breaks through the traditional design concept of double guide rails and adopts a double guide rail structure that combines linear guide rails and double R-rails. The overall structure layout is more compact and suitable for smaller elevator shafts. At the same time, it can maximize the door opening distance in a small shaft space.

[0018] The left and right shutter slides are fixedly connected to the sliders of a high-precision linear guide. The linear guide itself has the characteristics of smooth and stable operation, high precision, and no shaking, which avoids the shutter slides shaking on the guide.

[0019] The left and right slow shutter slides are designed with an extended length. The slow shutter slides have inclined elongated holes. By adjusting the installation position of the first sliding roller in the inclined elongated hole, the gap between the first sliding roller and the double R guide rail can be adjusted, and the double R guide rail can be adapted to guide the door. This makes up for the structural defects of traditional narrow slides, solves the problem of overall shaking of the door panel during operation, ensures the stability of the door operation, and reduces the tilting amplitude when the door panel encounters external resistance during closing, operation and opening. This overcomes the technical problem of the door gap widening when encountering resistance in existing devices.

[0020] This device offers two reset methods: spring reset and counterweight reset, as well as two emergency unlocking methods: lintel lock and door panel lock. Users can choose flexibly according to their actual needs, which improves the applicability and convenience of the product. Attached Figure Description

[0021] Figure 1 is a schematic diagram of the overall structure of a linear guide rail double-fold door device according to an embodiment of the present invention; Figure 2 is a partial enlarged view of point A in Figure 1; Figure 3 is a left view of a linear guide rail double-fold door device according to an embodiment of the present invention; Figure 4 is a partial enlarged view of point B in Figure 3; Figure 5 is a schematic diagram of the left-side linkage method according to an embodiment of the present invention; Figure 6 is a schematic diagram of the right-side linkage method according to an embodiment of the present invention; Reference numerals: 1. Body; 101. Double R guide rail; 102. Linear guide rail; 103. Pressure block; 104. Slider; 2. Threshold; 3. Slow shutter assembly; 301. Left slow shutter slide plate; 302. Right slow shutter slide plate; 303. Upper pulley; 304. First lower pulley; 4. Shutter assembly; 401. Left 402. Right shutter slide plate; 403. Second lower pulley; 5. First transmission assembly; 501. First left small rope pulley; 502. Second left small rope pulley; 503. First right small rope pulley; 504. Second right small rope pulley; 505. Left small steel wire rope; 506. Right small steel wire rope; 6. Second transmission assembly; 601. Left large rope pulley; 602. Right large rope pulley; 603. Large steel wire rope; 7. Door panel assembly; 701. Slow shutter door panel; 702. Fast shutter door panel; 8. Lock hook assembly; 801. Lock body; 802. Lock hook; 9. Reset counterweight; 901. Reset pulley; 902. Counterweight steel wire rope; 10. Reset spring; 11. Emergency unlocking mechanism; 111. Door lintel lock; 112. Door panel lock. Detailed Implementation

[0022] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0023] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0024] The following detailed description of some embodiments of the present invention is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0025] As shown in Figures 1-6, Embodiment 1 of the present invention provides a linear guide rail split double-fold door device, including a body 1, a sill 2, a slow shutter assembly 3, a fast shutter assembly 4, a door panel assembly 7, and a lock hook assembly 8. A slider 104 is provided below the door panel assembly 7. The sill 2 has a groove that matches the gap of the slider 104. The slider 104 can slide along the groove. Through the cooperation between the slider 104 and the groove, the lower end of the door panel is guided and limited, ensuring the stability of the lower end of the door panel during operation and preventing the door panel from swinging.

[0026] The shutter panel assembly 7 includes a slow shutter panel 701 and a fast shutter panel 702. A linear guide rail 102 and a double-R guide rail 101 are fixedly installed on the main body 1. The slow shutter assembly 3 includes a left slow shutter slide plate 301 and a right slow shutter slide plate 302 set on the double-R guide rail 101. The two slide in opposite directions along the double-R guide rail 101. The slow shutter panel 701 is installed below the left slow shutter slide plate 301 and the right slow shutter slide plate 302. The left slow shutter slide plate 301 and the right slow shutter slide plate 302 are both lengthened to increase the length of the cooperation with the double-R guide rail 101, making the slow shutter slide plate run more smoothly on the guide rail and effectively eliminating the shaking of the slide plate during operation, thereby ensuring the running stability of the slow shutter panel 701.

[0027] The shutter assembly 4 includes a left shutter slide 401 and a right shutter slide 402. Both the left shutter slide 401 and the right shutter slide 402 are fixedly connected to the slider on the linear guide rail 102, and the two can slide in opposite directions along the linear guide rail 102. The shutter plate 702 is installed below the left shutter slide 401 and the right shutter slide 402.

[0028] The linear guide 102 features smooth and stable operation, high precision, and wear resistance. By fixing the shutter slide plate to the slider of the high-precision linear guide 102, the shaking that is prone to occur when the shutter slide plate runs on a traditional guide rail is avoided, thereby eliminating the shaking of the shutter gate 702 during operation. At the same time, it overcomes the deformation problem caused by obstruction of the gate plate operation, achieving a smooth operation effect.

[0029] The locking hook assembly 8 includes a lock body 801 and a locking hook 802 that hooks and cooperates with the lock body 801 (in the figure, the locking hook 802 cooperates with the lock body 801 to form the locking hook assembly 8). The lock body 801 and the locking hook 802 are respectively fixedly installed on the left shutter slide plate 401 and the right shutter slide plate 402. Through the cooperation of the locking hook assembly 8 with the center split double folding car door device, the linkage opening and closing of the landing door and the car door can be realized.

[0030] The shutter assembly 4 and the slow shutter assembly 3 are linked together through the first transmission assembly 5 and the second transmission assembly 6.

[0031] The first transmission assembly 5 includes a first left small rope pulley 501, a second left small rope pulley 502, a left small steel wire rope 505, a first right small rope pulley 503, a second right small rope pulley 504, and a right small steel wire rope 506. The first left small rope pulley 501 and the second left small rope pulley 502 are respectively fixed to the left and right sides of the upper end of the left slow shutter slide plate 301; the left small steel wire rope 505 is wound around the first left small rope pulley 501 and the second left small rope pulley 502, and the left small steel wire rope 505... One side is connected to the left shutter slide plate 401, and the other side is fixedly connected to the body 1 through the pressure block 103; the first right small rope pulley 503 and the second right small rope pulley 504 are respectively fixed to the left and right sides of the upper end of the right slow shutter slide plate 302, and the right small steel wire rope 506 is wound around the first right small rope pulley 503 and the second right small rope pulley 504, and one side of the right small steel wire rope 506 is connected to the right shutter slide plate 402, and the other side is fixedly connected to the body 1 through the pressure block 103.

[0032] When the left shutter speed slider 401 moves, one end of the left small steel wire rope 505 is fixedly connected to the left shutter speed slider 401, and the other end is fixed to the body 1 through the pressure block 103. The left small steel wire rope 505 is wound around two small pulleys (the first left small pulley 501 and the second left small pulley 502) on the left slow shutter speed slider 301. Therefore, the movement of the left shutter speed slider 401 will drive the left slow shutter speed slider 301 to move along the double R guide rail 101 through the left small steel wire rope 505, realizing the linkage between the left shutter speed slider and the left slow shutter speed slider. Specifically, when the door is opened, the left shutter speed slider 401 moves to the left, pulling the left slow shutter speed slider 301 to the left through the left small steel wire rope 505; the opposite is true when the door is closed. Similarly, the right small steel wire rope 506 on the right side realizes the linkage between the right shutter speed slider 402 and the right slow shutter speed slider 302.

[0033] The second transmission assembly 6 includes a left large rope pulley 601, a right large rope pulley 602, and a large steel wire rope 603. The left and right large rope pulleys 601 and 602 are arranged symmetrically and are both fixed to the main body 1 by screws. The large steel wire rope 603 is wound around the left and right large rope pulleys 601 and 602, with one side of the large steel wire rope 603 fixedly connected to the left shutter slide plate 401 and the other side fixedly connected to the right shutter slide plate 402. The large steel wire rope 603 is wound around the left and right large rope pulleys 601 and 602, and its two ends are connected to the left and right shutter slide plates 401 and 402, respectively. When the right shutter slide 402 is driven (by the door door clamping hook 802) to move to the right, the left shutter slide 401 moves synchronously to the left through the transmission of the large steel wire rope 603, the left large rope wheel 601, and the right large rope wheel 602, thus realizing the opening of the left shutter slide 401 and the right shutter slide 402.

[0034] Through the cooperation of the first transmission component 5 and the second transmission component 6, the linkage of the entire landing door device is realized: when the car door drives the right shutter slide 402 to move to the right, the right shutter slide 402 drives the left shutter slide 401 to move to the left through the large steel wire rope 603. At the same time, the right shutter slide 402 drives the right slow shutter slide 302 to move to the right through the right small steel wire rope 506, and the left shutter slide 401 drives the left slow shutter slide 301 to move to the left through the left small steel wire rope 505, thereby realizing the sequential opening or closing of the four door panels.

[0035] Two upper pulleys 303 are fixedly installed on both the left slow shutter slide 301 and the right slow shutter slide 302, and two first lower pulleys 304 are detachably connected to each other by nuts. Inclined elongated holes are provided on the left slow shutter slide 301 and the right slow shutter slide 302, and the first lower pulleys 304 are installed in the inclined elongated holes. By adjusting the installation position of the first lower pulleys 304 in the inclined elongated holes, the gap between the first lower pulleys 304 and the double R guide rail 101 can be adjusted.

[0036] The upper pulley 303 and the lower pulley together clamp the double R guide rail 101, ensuring that the slow shutter slide plate runs smoothly along the guide rail. The design of the inclined elongated hole makes the installation position of the first lower pulley 304 adjustable, thereby adjusting the fit clearance between the lower pulley and the guide rail. This ensures smooth operation while avoiding wobbling caused by excessive clearance, improving the adaptability of the assembly and the stability of operation.

[0037] The left shutter slide 401 and the right shutter slide 402 are both fixedly connected to the slider on the linear guide rail 102 by countersunk screws and welded to prevent displacement due to external forces.

[0038] Two second sliding rollers 403 are installed at the lower ends of the left shutter slide plate 401 and the right shutter slide plate 402. The second sliding rollers 403 are in close contact with the linear guide rail 102. The second sliding rollers 403 provide auxiliary support and guidance for the lower end of the shutter slide plate. The surface of the second sliding rollers 403 is made of plastic material to ensure smooth operation, reduce noise, and prevent the shutter plate from tilting when subjected to external impact.

[0039] The left shutter slide 401 and the right shutter slide 402 are equipped with adjusting components for adjusting the tension of the large steel wire rope 603, the first small steel wire rope, or the second small steel wire rope.

[0040] The device also includes an emergency unlocking mechanism 11, which can be either a lintel lock 111 or a door panel lock 112. The lintel lock 111 is located on the lintel, and the door panel lock 112 is located on the door panel. Both can be used to open the landing door from the outside in an emergency. Providing two emergency unlocking methods for users to choose from meets different application scenarios and safety regulations, improving the safety and adaptability of the device.

[0041] The device also includes a reset assembly, which is a reset spring 10. One end of the reset spring 10 is connected to the left shutter slide 401, and the other end is connected to the main body 1. When the door is opened, the left shutter slide 401 moves to the left, stretching the reset spring 10 and allowing the spring to store elastic potential energy. When the external force of opening the door is released, the spring releases its energy and contracts, pulling the left shutter slide 401 to the right to reset, thereby driving the entire door panel system to close.

[0042] Example 2 The difference between this example and Example 1 is that the reset component is set in a different way. In this example, the reset component is a reset hammer 9. A reset pulley 901 is fixedly installed on one side of the main body 1. The reset hammer 9 includes a hammer component and a hammer wire rope 902. One end of the hammer wire rope 902 is connected to the hammer component, and the other end passes around the reset pulley 901 and is fixedly connected to the left shutter slide plate 401.

[0043] When the door is opened, the left shutter slide 401 moves to the left, pulling the counterweight upward through the counterweight wire rope 902, so that the counterweight gains gravitational potential energy; when the external force of opening the door is released, the counterweight descends under the action of gravity, pulling the left shutter slide 401 to the right to reset through the counterweight wire rope 902, thereby driving the entire door panel system to close.

[0044] The working process of this device is as follows: the initial state is the closed state. When the car arrives at the landing, the door knife on the car door cooperates with the locking hook assembly 8 on the right shutter slide plate 402. After the door knife clamps the locking hook, it drives the right shutter slide plate 402 to move to the right.

[0045] The movement of the right shutter slide 402 is transmitted to the left shutter slide 401 via the large steel wire rope 603 and the left large rope pulley 601 and right large rope pulley 602, causing the left shutter slide 401 to move synchronously to the left, thus opening the left and right shutter slides 402. Simultaneously, the movement of the right shutter slide 402 is transmitted to the right slow shutter slide 302 via the right small steel wire rope 506 and two small rope pulleys (first right small rope pulley 503 and second right small rope pulley 504), causing the right slow shutter slide 302 to move to the right; the movement of the left shutter slide 401 is transmitted to the left slow shutter slide 301 via the left small steel wire rope 505 and two small rope pulleys (first left small rope pulley 501 and second left small rope pulley 502), causing the left slow shutter slide 301 to move to the left. This achieves the opening of all four door panels; the closing process is the reverse.

[0046] Throughout the operation, the linear guide rail 102 ensures the smooth and wobbly operation of the left shutter slide plate 401 and the right shutter slide plate 402. The double-R guide rail 101, together with the extended design of the left slow shutter slide plate 301 and the right slow shutter slide plate 302, ensures the stable operation of the slow shutter door panel 701. The inclined elongated holes on the left slow shutter slide plate 301 and the right slow shutter slide plate 302 can adjust the fit clearance between the first sliding roller 304 and the double-R guide rail 101, overcoming the problem of the non-adjustable fit clearance of traditional guide rails. The plastic material layer of the second sliding roller 403 reduces noise and resists impact, together ensuring the stable operation of the device under small door opening distances, overcoming the problems of door panel shaking and door gap widening when encountering obstacles in the existing technology.

[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solutions of the present invention, and these modifications or equivalent substitutions cannot cause the modified technical solutions to deviate from the spirit and scope of the technical solutions of the present invention.

Claims

1. A linear guide rail split double-fold door device, characterized in that: The device includes a body, a sill, a slow shutter assembly, a fast shutter assembly, a door panel assembly, a reset assembly, and a locking hook assembly. A slider is located below the door panel assembly. The sill has a groove that matches the clearance of the slider, allowing the slider to slide along the groove. The fast shutter assembly and the slow shutter assembly are linked via a first transmission assembly and a second transmission assembly. The door panel assembly includes a slow shutter door panel and a fast shutter door panel. A linear guide rail and a double-R guide rail are fixedly mounted on the body. The slow shutter assembly includes a left slow shutter slide plate and a right slow shutter slide plate, both of which cooperate with the double-R guide rails. The shutter door panel is installed below the left and right slow shutter slides, and the shutter assembly includes a left and right shutter slide, both of which are fixedly connected to a slider on a linear guide rail and can slide in opposite directions along the linear guide rail. The shutter door panel is installed below the left and right shutter slides. The locking hook assembly includes a locking body and a locking hook that hooks and engages with the locking body. The locking body and the locking hook are respectively fixedly installed on the left and right shutter slides.

2. The linear guide rail split double-fold door device according to claim 1, characterized in that: The first transmission assembly includes a first left small rope pulley, a second left small rope pulley, a left small steel wire rope, a first right small rope pulley, a second right small rope pulley, and a right small steel wire rope. The first left small rope pulley and the second left small rope pulley are respectively fixed to the left and right sides of the upper end of the left slow shutter slide. The left small steel wire rope is wound around the first left small rope pulley and the second left small rope pulley, and one side of the left small steel wire rope is connected to the left fast shutter slide, while the other side is fixedly connected to the body through a pressure block. The first right small rope pulley and the second right small rope pulley are respectively fixed to the left and right sides of the upper end of the right slow shutter slide. The right small steel wire rope is wound around the first right small rope pulley and the second right small rope pulley, and one side of the right small steel wire rope is connected to the right fast shutter slide, while the other side is fixedly connected to the body through a pressure block.

3. A linear guide rail split double-fold door device according to claim 2, characterized in that: The second transmission assembly includes a left large rope pulley, a right large rope pulley, and a large steel wire rope. The left and right large rope pulleys are arranged symmetrically and are both fixed to the body by screws. The large steel wire rope is wound around the left and right large rope pulleys, and one side of the large steel wire rope is fixedly connected to the left shutter slide plate, and the other side is fixedly connected to the right shutter slide plate.

4. A linear guide rail split double-fold door device according to claim 2, characterized in that: Both the left and right slow shutter slides are fixedly equipped with two upper pulleys, and each is detachably connected to two first lower pulleys via nuts. The upper pulleys and first lower pulleys slide in cooperation with the double R guide rail. The left and right slow shutter slides are provided with inclined elongated holes. By adjusting the installation position of the first lower pulleys in the inclined elongated holes, the gap between the first lower pulleys and the double R guide rail can be adjusted.

5. A linear guide rail split double-fold door device according to claim 4, characterized in that: The left and right shutter slides are fixedly connected to the slider on the linear guide rail by countersunk screws and welded to prevent displacement due to external forces. The lower ends of the left and right shutter slides are each equipped with two second sliding rollers, which are in close contact with the linear guide rail. The surface of the second sliding rollers is made of plastic material to ensure smooth operation, reduce noise, and prevent the door panel from tilting when subjected to external impacts.

6. A linear guide rail split double-fold door device according to claim 1, characterized in that: The reset component is a reset spring, one end of which is connected to the left shutter slide plate, and the other end is connected to the main body.

7. A linear guide rail split double-fold door device according to claim 1, characterized in that: The reset component is a reset hammer. A reset pulley is fixedly installed on one side of the main body. The reset hammer includes a hammer component and a hammer wire rope. One end of the hammer wire rope is connected to the hammer component, and the other end passes around the reset pulley and is fixedly connected to the left shutter slide plate.

8. A linear guide rail split double-fold door device according to claim 5, characterized in that: The left and right shutter slides are equipped with adjusting components for adjusting the tension of the large steel wire rope, the first small steel wire rope, or the second small steel wire rope.

9. A linear guide rail split double-fold door device according to claim 8, characterized in that: Both the left and right slow shutter slides are designed to be longer to eliminate wobbling during operation.

10. A linear guide rail split double-fold door device according to claim 1, characterized in that: The device also includes an emergency unlocking mechanism, which is a lintel lock or a door panel lock.

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