A flat sliding electric shield door without threshold and a working method thereof

Abstract

The application discloses a flat-open type electric shield door without a threshold, and relates to the technical field of shield doors. The flat-open type electric shield door without a threshold comprises a main door body, a first driving mechanism, an auxiliary door body, a moving shield body and a second driving mechanism. The main door body is connected with a door frame through a hinge. The first driving mechanism is arranged on the main door body and is used for driving the main door body to rotate. The auxiliary door body is installed on the main door body and is slidably connected with the main door body in the vertical direction. The moving shield body is installed on the auxiliary door body and is slidably connected with the auxiliary door body in the horizontal direction. The second driving mechanism is installed on the auxiliary door body and is used for driving the auxiliary door body to lift and the moving shield body to translate. A guide rail is arranged in a door groove on the front side of the door frame. A moving trolley is slidably connected with the guide rail. In the door opening state, the moving trolley is slid to the front of the door frame and fills the door groove. The application meets the requirement of large equipment transfer through the design without a threshold, and can avoid the damage of beryllium copper reed.

Description

Technical Field

[0001] This invention relates to the field of shielded door technology, and in particular to a swing-type thresholdless electric shielded door and its working method. Background Technology

[0002] An electromagnetic shielding door is a device that isolates electromagnetic waves. It can isolate external electromagnetic interference, protect indoor equipment from normal operation, or block the spread of indoor electromagnetic radiation to the outside, preventing the leakage of electronic communication information.

[0003] Existing electromagnetic shielding doors are mainly divided into hinged and sliding types. Hinged shielding doors are basically manual shielding doors with low automation. They are also equipped with fixed or removable thresholds, which poses difficulties for the transportation of large equipment. Due to the structural problems of the hinged design, the blades on the hinge side rotate at a large angle, which often causes excessive compression and deformation of the shielding beryllium copper springs, resulting in damage and affecting the shielding effect. Therefore, figuring out a shielding door that can both accommodate the transport of large equipment and prevent damage to the beryllium copper springs is one of the urgent problems to be solved. Summary of the Invention

[0004] In order to solve at least one of the technical problems mentioned in the background art, the present invention aims to provide a swing-type thresholdless electric shielding door and its working method, which meets the needs of large equipment transportation through the thresholdless design, while avoiding damage to the beryllium copper spring.

[0005] In a first aspect, the present invention provides a swing-type thresholdless electric screen door, comprising: The main door body is connected to the door frame via hinges, and the main door body is provided with a first drive mechanism for driving the main door body to rotate. The auxiliary door body is installed on the main door body and slides in a vertical direction with the main door body; The movable shield is installed on the auxiliary door and slides horizontally with the auxiliary door. The second drive mechanism is installed on the auxiliary door body to drive the auxiliary door body to rise and fall and the moving shield body to move horizontally; The guide rail is installed in the door groove on the front side of the door frame; The trolley slides in conjunction with the guide rail. When the door is open, the trolley slides to the front of the door frame and fills the door groove.

[0006] In some embodiments of the first aspect of the present invention, the first drive mechanism includes a motor and a connecting rod, one end of the connecting rod being connected to the output shaft of the motor, and the other end of the connecting rod being connected to the hinge shaft of the hinge.

[0007] In some embodiments of the first aspect of the present invention, the main door and / or auxiliary door adopt a frame structure, with the main door located between the auxiliary door and the movable shield.

[0008] In some embodiments of the first aspect of the present invention, the second driving mechanism includes: The first transmission chain is used to drive the auxiliary door body to rise and fall vertically; the first transmission chain includes at least one vertically arranged first elevator and a first coupling mechanism for driving the output end of the first elevator to rise and fall vertically. The second transmission chain is used to drive the movable shield to translate horizontally; the second transmission chain includes at least one horizontally arranged second elevator and a second coupling mechanism for driving the output end of the second elevator to translate horizontally. A dual-output-shaft motor includes a first output shaft and a second output shaft. The first output shaft is connected to a first coupling mechanism via a first clutch, and the second output shaft is connected to a second coupling mechanism via a second clutch.

[0009] In some embodiments of the first aspect of the present invention, the first coupling mechanism includes a vertically arranged first drive shaft and a horizontally arranged second drive shaft; the first end of the first drive shaft and the first end of the second drive shaft are connected via a first commutator, the second end of the first drive shaft is connected to the first output shaft of a dual-output shaft motor via a first clutch, and the second end of the second drive shaft is connected to a first elevator.

[0010] In some embodiments of the first aspect of the present invention, the second coupling mechanism includes a horizontally arranged third drive shaft and a vertically arranged fourth drive shaft; the first end of the third drive shaft is connected to a second clutch via a second commutator; the second end of the third drive shaft and the first end of the fourth drive shaft are connected via a third commutator, and the second end of the fourth drive shaft is connected to a second elevator.

[0011] In some embodiments of the first aspect of the present invention, the mobile trolley includes a vehicle body, guide wheels and traveling wheels disposed at the bottom of the vehicle body, the guide wheels sliding / rolling with the guide rail; the door slot includes a traveling slot and a guide slot disposed from top to bottom, the width of the traveling slot is greater than that of the guide slot, the guide rail and the guide wheel are located in the guide slot, and the traveling wheel is in contact with the bottom of the traveling slot.

[0012] In some embodiments of the first aspect of the present invention, an outer shell and an inner sliding block are nested together vertically. The outer shell is fixed to the vehicle body, and the driving wheel is mounted on the inner sliding block. A disc spring is provided between the outer shell and the inner sliding block. In the unloaded state, the disc spring applies an upward pressure to the outer shell and the vehicle body, so that the top of the vehicle body is higher than the ground. In the loaded state, the vehicle body sinks and becomes level with the ground.

[0013] In some embodiments of the first aspect of the present invention, a reinforcing support is provided at the position of the guide rail directly in front of the door frame, and the reinforcing support protrudes upward on the upper side of the guide rail.

[0014] Secondly, the present invention provides a method for operating a swing-type thresholdless electric screen door based on the first aspect, including... Opening process: The auxiliary door body drives the movable shield to rise until it is higher than the guide rail. The main door body drives the auxiliary door body and the movable shield to rotate and pass over the guide rail until they are parallel to the door frame. The auxiliary door body drives the movable shield to descend until the movable shield is facing the door frame. The movable shield moves towards the door frame until the two are in contact to form a shield. Closing procedure: The movable shield moves away from the door frame until they are separated. The auxiliary door body drives the movable shield body to rise until it is higher than the guide rail. The main door body drives the auxiliary door body and the movable shield body to rotate and pass over the guide rail until it is fully open. The movable trolley moves to the front of the door frame and fills the door groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention improves the traditional full-section swing door opening method to a swing door opening and closing method with translation. The shielding is achieved by moving the shielding body and the relative translation of the door frame. Therefore, it can avoid the damage caused by excessive compression and deformation of the beryllium copper spring due to the large rotation angle of the insert blade on the hinge side in the traditional full-section swing door opening method.

[0016] 2. This invention uses a mobile trolley to fill the door groove on the front side of the door frame, thereby achieving a threshold-free design to meet the needs of transporting large equipment. At the same time, the auxiliary door body avoids the guide rail during the opening process by raising and lowering the auxiliary door body. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0018] Figure 2 This is a schematic diagram of the three-layer door structure of the present invention.

[0019] Figure 3 for Figure 2 Enlarged view of a portion of point A in the middle.

[0020] Figure 4 This is a side view of the three-layer door of the present invention.

[0021] Figure 5 This is a schematic diagram of the second drive mechanism of the present invention.

[0022] Figure 6 This is a schematic diagram of the second driving mechanism of the present invention.

[0023] Figure 7 This is a schematic diagram of the guide rail and moving trolley structure of the present invention.

[0024] Figure 8 for Figure 7 A magnified view of section B.

[0025] Figure 9 This is a cross-sectional view of the guide rail and the moving trolley of the present invention.

[0026] Figure 10 This is a schematic diagram of the installation of the walking wheel of the present invention.

[0027] In the picture: 1. Main door body; 10. First drive mechanism; 11. Hinge; 12. Motor; 13. Connecting rod; 2. Auxiliary door body; 21. Sliding column; 22. Sliding seat; 3. Mobile shielding; 4. Door frame; 5. Second drive mechanism; 51. First transmission chain; 511. First elevator; 512. First drive shaft; 513. Second drive shaft; 514. First commutator; 515. First manual commutator; 52. Second transmission chain; 521. Second elevator; 522. Third drive shaft; 523. Fourth drive shaft; 524. Second commutator; 525. Third commutator; 526. Second manual commutator; 527. Third elevator; 53. Dual output shaft motor; 531. First clutch; 532. Second clutch; 6. Guide rail; 61. Reinforced support section; 7. Mobile trolley; 71. Car body; 72. Guide wheels; 73. Running wheels; 8. Door groove; 81. Guide groove; 82. Traveling groove. Detailed Implementation

[0028] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] Example 1: Please refer to Figure 1 This embodiment provides a swing-type thresholdless electric screen door, including a main door body 1, an auxiliary door body 2, a movable screen body 3, a second drive mechanism 5, a guide rail 6, and a movable trolley 7.

[0030] Please refer to Figure 2 and Figure 4 The main door body 1, auxiliary door body 2, and movable shield 3 constitute a three-layer door structure, as detailed below: The main door 1 adopts a frame structure and is connected to the door frame 4 via hinges 11. A first drive mechanism 10 for driving the main door 1 to rotate is provided on the main door 1. The first drive mechanism 10 includes a motor 12 and a connecting rod 13. One end of the connecting rod 13 is connected to the output shaft of the motor 12, and the other end of the connecting rod 13 is connected to the hinge axis of the hinge 11. Through the operation of the motor 12, the main door 1 can rotate relative to the door frame 4 around the hinge axis, thereby realizing the opening / closing of the main door 1.

[0031] The auxiliary door 2 also adopts a frame structure, is installed on the main door 1, and slides vertically with the main door 1. For details, please refer to... Figure 3 The auxiliary door 2 is fixedly provided with a vertically extending sliding column 21, and the main door 1 is fixedly provided with a sliding seat 22. The sliding column 21 and the sliding seat 22 are slidably engaged. Therefore, the auxiliary door 2 can slide along the extension direction of the sliding column 21, which is equivalent to the main door 1.

[0032] The movable shield 3 is the structure that ultimately shields the door frame 4. It adopts an overall fully enclosed panel, with the main door 1 located between the auxiliary door 2 and the movable shield 3.

[0033] The movable shield 3 is installed on the auxiliary door 2 and slides horizontally with the auxiliary door 2. One of the movable shield 3 and the door frame 4 has inserts around its perimeter, and the other has a beryllium copper spring at a corresponding position. The inserts and the beryllium copper spring together form a shielding mechanism; when they are inserted together, electromagnetic shielding can be achieved.

[0034] With the above three-layer door structure, during the shielding process, the movable shield 3 can be moved relative to the door frame 4 to ensure that the movable shield 3 and the door frame 4 are always parallel. In other words, the gap and compression between the insert and the spring are always uniform, avoiding the situation in the traditional swing opening process where the insert on the hinge side rotates at a large angle, and the shielding beryllium copper spring is often compressed and deformed too much and damaged. In order to realize the movement of the auxiliary door body 2 and the movable shield 3, this embodiment also provides a second driving mechanism 5, which is installed on the auxiliary door body 2 and drives the auxiliary door body 2 to rise and fall and the movable shield 3 to move horizontally.

[0035] For details, please refer to Figure 5 and Figure 6 The second drive mechanism 5 includes a first transmission chain 51, a second transmission chain 52, and a dual-output shaft motor 53.

[0036] The first transmission chain 51 is used to drive the auxiliary door body to move vertically. The first transmission chain 51 includes at least one vertically arranged first elevator 511 and a first coupling mechanism for driving the output end of the first elevator 511 to move vertically.

[0037] It is worth mentioning that the vertical setting of the first elevator 511 means that the output shaft of the first elevator 511 can move in a vertical direction. In addition, the end of the output shaft of the first elevator 511 is connected to the main door 1, thereby realizing the relative lifting of the main door 1 and the auxiliary door 2.

[0038] Specifically, the first coupling mechanism includes a vertically arranged first drive shaft 512 and a horizontally arranged second drive shaft 513. The first end of the first drive shaft 512 and the first end of the second drive shaft 513 are connected via a first commutator 514 to transmit the rotation of the vertically arranged first drive shaft 512 to the horizontally arranged second drive shaft 513.

[0039] The second end of the second drive shaft 513 is connected to the first elevator 511, thereby driving the first elevator 511 to work and realize the relative movement of the auxiliary door body 2 and the main door body 1 connected to the first elevator 11 in the vertical direction.

[0040] In a more preferred embodiment, the first commutator 511 is a 1-LR type commutator.

[0041] To enhance the stability of the vertical lifting motion, two first lifting machines 511 are symmetrically distributed on the left and right sides of the first commutator 514. The two first lifting machines 511 are respectively connected to the left and right sides of the first commutator 514 via the second drive shaft 513.

[0042] The second transmission chain 52 is used to drive the movable shield 3 to move horizontally relative to the auxiliary door 2. The second transmission chain 52 includes at least one horizontally arranged second elevator 521 and a second coupling mechanism for driving the output end of the second elevator 521 to move horizontally.

[0043] Similarly, the horizontal setting of the second elevator 521 means that the output shaft of the second elevator 521 can move in the horizontal direction. In addition, the end of the output shaft of the second elevator 521 is connected to the movable shield 3, thereby realizing the relative translation between the auxiliary door 2 and the movable shield 3. It is worth mentioning that the middle part of the output end of the second elevator 521 passes through the gap in the frame of the main door 1.

[0044] Specifically, the second coupling mechanism includes a horizontally arranged third drive shaft 522 and a vertically arranged fourth drive shaft 523. The second end of the third drive shaft 522 and the first end of the fourth drive shaft 523 are connected via a third commutator 525 to transmit the rotation of the horizontally arranged third drive shaft 522 to the vertically arranged fourth drive shaft 523.

[0045] The second end of the fourth drive shaft 523 is connected to the second elevator 521, thereby driving the second elevator 521 to work and realize the translational movement of the movable shield 3 connected to the second elevator 521 in the horizontal direction.

[0046] To enhance translational stability, two second elevators 521 are symmetrically distributed on the left and right sides of the first drive shaft 512. The two second elevators 521 are connected to the left and right sides of the second commutator 524 via the fourth drive shaft 523, the third commutator 525, and the third drive shaft 522, respectively.

[0047] The dual-output-shaft motor 53 includes a first output shaft and a second output shaft.

[0048] The first output shaft is connected to the first coupling mechanism via the first clutch 531. Specifically, the second end of the first drive shaft 512 is connected to the first output shaft of the dual-output shaft motor via the first clutch 531.

[0049] The second output shaft is connected to the second coupling mechanism via the second clutch 532. Specifically, the first end of the third drive shaft 522 is connected to the second clutch via the second commutator 524.

[0050] When the first drivetrain needs to operate, the first clutch 531 engages, the second clutch 532 disengages, and the dual-output-shaft motor 53 connects to the first drivetrain. Conversely, when the second drivetrain needs to operate, the second clutch 532 engages, the first clutch 531 disengages, and the dual-output-shaft motor 53 connects to the second drivetrain. The operating sequence of the two drivetrains can be determined according to actual usage conditions, and they do not affect each other.

[0051] Preferably, the fourth drive shaft 523 extends from the third commutator 525 toward the first elevator 511, such that the second elevator 521 is located approximately at the middle of the first drive shaft 512 in terms of height.

[0052] To further enhance the stability of the translational motion, a horizontally arranged third elevator 527 is also connected to the side of the third commutator 525 away from the second elevator 521.

[0053] Two second elevators 521 and two third elevators 527 are symmetrically arranged on the left and right sides, forming a 2*2 array distribution.

[0054] It is worth mentioning that the first, second, and third commutators are preferably 1-LR type commutators. Universal joint couplings are respectively installed at both ends of the first, second, third, and fourth drive shafts, such as... Figure 6 The small circle in the diagram represents the universal joint coupling.

[0055] To prevent the system from malfunctioning in the event of a motor failure, this embodiment also provides a U-LR type manual commutator on the first drive shaft 512 and / or the fourth drive shaft 523. Specifically, as shown... Figures 5 to 6 As shown, a first manual commutator 515 is provided on the first drive shaft 512, and a second manual commutator 526 is provided on the fourth drive shaft 523. It is worth mentioning that there are two fourth drive shafts 523, and only one of them needs to be equipped with the second manual commutator 526.

[0056] Please refer to Figure 1 and Figure 9 The guide rail 6 is located in the door groove 8 on the front side of the door frame 4.

[0057] The mobile trolley 7 slides in cooperation with the guide rail 6. When the door is open, the mobile trolley 7 slides to the front of the door frame 4 and fills the door groove 8, thereby realizing a frameless design and meeting the needs of large equipment transportation and vehicle mobility.

[0058] Specifically, the mobile trolley 7 includes a body 71 and guide wheels 72 disposed at the bottom of the body 71. The guide wheels 72 slide / roll with the guide rail 6.

[0059] The door slot 8 includes a walking slot 82 and a guide slot 81 arranged from top to bottom. The width of the walking slot 82 is greater than that of the guide slot 81, thus forming a roughly T-shaped door slot 8.

[0060] The guide rail 6 and guide wheel 72 are located in the guide groove 81; the vehicle body 71 is also provided with a traveling wheel 72, which is in contact with the bottom of the traveling groove 82.

[0061] like Figure 9 and Figure 10 As shown, in order to reduce the pressure between the moving trolley 7 and the guide rail 6 when unloaded, thereby reducing friction, an outer shell 731 and an inner sliding block 732 are also included, which are nested together in the vertical direction. The outer shell 731 is fixed on the vehicle body 71, and the traveling wheel 73 is installed on the inner sliding block 732. A disc spring 733 is provided between the outer shell 731 and the inner sliding block 732.

[0062] In the unloaded state (i.e., no load), the disc spring 733 applies upward pressure to the outer shell 731 and the car body 71, lifting the moving trolley 7 so that the top of the car body 71 is higher than the ground. At this time, the pressure between the guide rail 3 and the guide wheel 72 decreases or even the two do not contact each other, and the sliding friction also decreases.

[0063] Under load (i.e., when the vehicle or large equipment is moving and pressing on the moving trolley), the disc spring 733 is compressed, and the vehicle body 71 sinks down until it is level with the ground. At this time, the guide wheel 72 and the traveling wheel 73 jointly bear the weight of the vehicle or large equipment, and the traveling wheel 73 will not be damaged due to excessive pressure.

[0064] Meanwhile, in order to achieve the movement of the mobile trolley 7, such as Figure 8 and Figure 9 As shown, a rack 74 parallel to the guide rail 6 is provided on the vehicle body 7. In addition, a motor 75 is provided on the guide rail 6 or the ground. The output shaft of the motor 75 is provided with a gear 76 that meshes with the rack 74. When the motor 75 is working, the gear 76 drives the rack 74 to run along the guide rail 6, thereby driving the movement of the mobile vehicle 7.

[0065] To accommodate the transport of large equipment, local reinforcement of guide rail 6 is required. For details, please refer to... Figure 7 The guide rail 6 is provided with a reinforcing support 61 at the position directly in front of the door frame. The reinforcing support 61 protrudes upward on the upper side of the guide rail 6, and the thickness of the reinforcing support 61 is greater than the side wall thickness of the guide rail 6 at other positions.

[0066] Example 2: This embodiment provides a working method for a swing-type thresholdless electric screen door based on the method described in Embodiment 1, including: Opening process: The auxiliary door body drives the movable shield to rise until it is higher than the guide rail. The main door body drives the auxiliary door body and the movable shield to rotate and pass over the guide rail until they are parallel to the door frame. The auxiliary door body drives the movable shield to descend until the movable shield is facing the door frame. The movable shield moves towards the door frame until the two are in contact to form a shield. Closing procedure: The movable shield moves away from the door frame until they are separated. The auxiliary door body drives the movable shield body to rise until it is higher than the guide rail. The main door body drives the auxiliary door body and the movable shield body to rotate and pass over the guide rail until it is fully open. The movable trolley moves to the front of the door frame and fills the door groove.

[0067] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A swing-type thresholdless electric screen door, characterized in that, include: The main door body is connected to the door frame via hinges, and the main door body is provided with a first drive mechanism for driving the main door body to rotate. The auxiliary door body is installed on the main door body and slides in a vertical direction with the main door body; The movable shield is installed on the auxiliary door and slides horizontally with the auxiliary door. The second drive mechanism is installed on the auxiliary door body to drive the auxiliary door body to rise and fall and the moving shield body to move horizontally; The guide rail is installed in the door groove on the front side of the door frame; The trolley slides in cooperation with the guide rail. When the door is open, the trolley slides to the front of the door frame and fills the door groove. The main gate and / or auxiliary gate adopt a frame structure, with the main gate located between the auxiliary gate and the movable shield. The second drive mechanism includes: The first transmission chain is used to drive the auxiliary door body to rise and fall vertically; the first transmission chain includes at least one vertically arranged first elevator and a first coupling mechanism for driving the output end of the first elevator to rise and fall vertically. The second transmission chain is used to drive the movable shield to translate horizontally; the second transmission chain includes at least one horizontally arranged second elevator and a second coupling mechanism for driving the output end of the second elevator to translate horizontally. A dual-output-shaft motor includes a first output shaft and a second output shaft. The first output shaft is connected to a first coupling mechanism via a first clutch, and the second output shaft is connected to a second coupling mechanism via a second clutch.

2. A swing-type thresholdless electric shielding door according to claim 1, characterized in that, The first drive mechanism includes a motor and a connecting rod. One end of the connecting rod is connected to the output shaft of the motor, and the other end of the connecting rod is connected to the hinge shaft of the hinge.

3. A swing-type thresholdless electric shielding door according to claim 1, characterized in that, The first coupling mechanism includes a vertically arranged first drive shaft and a horizontally arranged second drive shaft; the first end of the first drive shaft and the first end of the second drive shaft are connected via a first commutator, the second end of the first drive shaft is connected to the first output shaft of a dual-output shaft motor via a first clutch, and the second end of the second drive shaft is connected to a first elevator.

4. A swing-type thresholdless electric shielding door according to claim 1, characterized in that, The second coupling mechanism includes a horizontally arranged third drive shaft and a vertically arranged fourth drive shaft; the first end of the third drive shaft is connected to the second clutch via a second commutator; the second end of the third drive shaft and the first end of the fourth drive shaft are connected via a third commutator, and the second end of the fourth drive shaft is connected to the second elevator.

5. A swing-type thresholdless electric shielding door according to claim 1, characterized in that, The mobile trolley includes a body, guide wheels and traveling wheels located at the bottom of the body, the guide wheels sliding / rolling with the guide rail; the door slot includes a traveling slot and a guide slot arranged from top to bottom, the width of the traveling slot is greater than the guide slot, the guide rail and guide wheels are located in the guide slot, and the traveling wheels are in contact with the bottom of the traveling slot.

6. A swing-type thresholdless electric shielding door according to claim 5, characterized in that, It also includes an outer shell and an inner sliding block that are nested together vertically. The outer shell is fixed to the vehicle body, and the wheels are mounted on the inner sliding block. A disc spring is provided between the outer shell and the inner sliding block. In the unloaded state, the disc spring applies an upward pressure to the outer shell and the vehicle body, making the top of the vehicle body higher than the ground. In the loaded state, the vehicle body sinks down and becomes level with the ground.

7. A swing-type thresholdless electric shielding door according to claim 5 or 6, characterized in that, The guide rail is provided with a reinforcing support at the position directly in front of the door frame, and the reinforcing support protrudes upward on the upper side of the guide rail.

8. A method for operating a swing-type thresholdless electric screen door according to any one of claims 1-7, characterized in that, include Opening process: The auxiliary door body drives the movable shield to rise until it is higher than the guide rail. The main door body drives the auxiliary door body and the movable shield to rotate and pass over the guide rail until they are parallel to the door frame. The auxiliary door body drives the movable shield to descend until the movable shield is facing the door frame. The movable shield moves towards the door frame until the two are in contact to form a shield. Closing procedure: The movable shield moves away from the door frame until they are separated. The auxiliary door body drives the movable shield body to rise until it is higher than the guide rail. The main door body drives the auxiliary door body and the movable shield body to rotate and pass over the guide rail until it is fully open. The movable trolley moves to the front of the door frame and fills the door groove.

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