Protective device for reserved hole of special-shaped curtain wall structure and using method

Abstract

The invention belongs to the technical field of safety protection of reserved holes, and discloses a protection device for a reserved hole of a special-shaped curtain wall structure and a using method.The protection device comprises a fixing frame, movable doors are symmetrically arranged on the front face of the fixing frame, a top plate is arranged at the top ends of the movable doors, and the back face of the top plate is fixedly installed at the top of the front face of the fixing frame; a bottom plate is slidably connected to the bottom end of the movable door, the back of the bottom plate is fixedly mounted at the bottom of the front of a fixing frame, a mounting frame is arranged on the back of the fixing frame, a base plate is arranged on the back of the mounting frame, a notch is formed in the center of the top end of the fixing frame, and a telescopic assembly is arranged between the mounting frame and the base plate; a switch assembly is arranged at the top end of the movable door and comprises a wrench, a fixing block and a driving mechanism. After the protection device is used, the movable door is closed, and then the wrench is taken out, so that the protection device cannot be opened without the wrench, the problem of opening by mistaken touch does not need to be worried about, and the accident that people are accidentally injured is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of safety protection of reserved openings, and more specifically, to a protective device for reserved openings of special-shaped curtain wall structures and a method for using the same. Background Art

[0002] Reserved openings are various types of openings reserved in the construction of special-shaped curtain wall buildings due to process requirements or equipment installation requirements. There are major safety issues in the construction process. If the openings are not protected in time when not in use or are improperly protected, there will be too many life-threatening hidden dangers for construction workers, such as falling from heights and being hit by objects. Therefore, the protection of reserved openings on floors is one of the most important tasks in safety management.

[0003] Some existing reserved hole protection devices are mainly composed of movable cover plates, through-wall bolts and supports. However, during installation, the floor slabs need to be destroyed by bolts, which will affect the structural stability of the floor slabs. If the hole needs to be sealed later, it will also cause sealing difficulties. In addition, the structure of the assembled protection device is fixed and not easy to adjust, and it cannot be applied to reserved holes of different widths, thereby reducing the applicability of the device. When the protection device is in use, it mainly covers the reserved hole with a movable cover plate to play a protective role. However, when construction workers pass by or clean the floor, the template may be lifted, which may easily cause accidents such as accidental injuries to people or the falling of small objects.

[0004] In order to solve the above problems, the present application provides a protective device for reserved openings in a special-shaped curtain wall structure and a method for using the same. Summary of the invention

[0005] The present application provides a protective device for a reserved opening of a special-shaped curtain wall structure and a method for using the same, which adopts the following technical solutions: A protective device for a reserved opening of a special-shaped curtain wall structure and a method for using the protective device, comprising a fixed frame, a movable door is symmetrically arranged on the front of the fixed frame, a top plate is arranged on the top of the movable door, the back of the top plate is fixedly installed on the top of the front of the fixed frame, the bottom end of the movable door is slidably connected with a bottom plate, the back of the bottom plate is fixedly installed on the bottom of the front of the fixed frame, a mounting frame is arranged on the back of the fixed frame, a pad is arranged on the back of the mounting frame, a notch is opened at the center of the top of the fixed frame, a storage box is slidably inserted and connected inside the notch, a handle is fixedly installed on the top of the storage box, and a telescopic component is arranged between the mounting frame and the pad; A switch assembly is provided at the top of the movable door, and the switch assembly includes a wrench, a fixing block and a driving mechanism. The wrench is arranged inside the storage box, a cavity is arranged inside the top plate, the driving mechanism is arranged inside the cavity, and the two fixing blocks are symmetrically arranged on both sides of the top plate.

[0006] Furthermore, the driving mechanism includes a first rotating rod, a driving gear, a rack and a fixed plate, the top of the top plate is provided with a circular hole adapted to the first rotating rod, the first rotating rod is rotatably connected inside the circular hole, and the top of the first rotating rod is provided with a socket adapted to the wrench.

[0007] Through the above technical solution, after one end of the wrench is inserted into the interior of the first rotating rod, the wrench can be rotated to drive the driving mechanism to operate.

[0008] Furthermore, the driving gear is sleeved on the outside of the first rotating rod, the two racks are symmetrically arranged on the front and back sides of the first rotating rod, and the opposite sides of the two racks are respectively meshed with the outer wall of the driving gear.

[0009] Through the above technical solution, when the driving gear rotates, the racks on the positive and negative sides can be driven to move towards each other.

[0010] Furthermore, the side of the rack away from the first rotating rod is slidably connected to the inner wall of the top plate, and the ends of the two racks close to each other are fixedly connected to the opposite sides of two fixed blocks respectively, and the bottom end of the fixed block is fixedly connected to the top side of the movable door.

[0011] Through the above technical solution, the rack and the movable door are connected through the fixed block, so when the rack moves, the movable door at the bottom can be driven to move synchronously.

[0012] Furthermore, the fixed plate is fixedly connected to the bottom of the top plate, the bottom end of the first rotating rod is rotatably connected to the top of the fixed plate, and the bottom end of the fixed plate is slidably connected to the top of the movable door.

[0013] Through the above technical solution, the first rotating rod is installed in the middle of the fixing frame through the fixing plate.

[0014] Furthermore, the telescopic mechanism includes a telescopic plate, a threaded rod, a first bevel gear, a second bevel gear and a second rotating rod. A connecting groove is opened inside the mounting frame, and the telescopic plate is slidably connected inside the connecting groove. The back side of the telescopic plate is arranged on the front side of the pad.

[0015] Through the above technical solution, the telescopic plate can drive the pad to move synchronously during the movement, thereby adjusting the distance between the pad and the fixing frame.

[0016] Furthermore, a threaded hole matched with the threaded rod is opened inside the telescopic plate, the threaded rod is rotatably connected to the inside of the telescopic plate, and one end of the threaded rod is rotatably connected to the inner wall of the mounting frame.

[0017] Through the above technical solution, when the threaded rod rotates, the telescopic plate can be driven to move inside the mounting frame.

[0018] Furthermore, the first bevel gear is sleeved on an arm rod at one end of the threaded rod, the outer wall of the second bevel gear is meshed with the outer wall of the first bevel gear, the side of the second bevel gear away from the threaded rod is fixedly connected to one end of the second rotating rod, and the other end of the second rotating rod extends to the outside of the mounting frame and is fixedly connected with a knob.

[0019] Through the above technical solution, the second rotating rod is driven to rotate by rotating the knob, and then the threaded rod is driven to rotate through the cooperation between the first bevel gear and the second bevel gear.

[0020] Furthermore, a reflective strip is provided on the front of the movable door, positioning screws are symmetrically provided inside the pad, one end of the positioning screw is fixedly connected to the back of the telescopic plate, and a fastening nut is sleeved on the outside of the positioning screw.

[0021] Through the above technical solution, by setting the reflective strip, it can play a reflective warning role at night, further improving the protection effect of the device.

[0022] Furthermore, the use operation of the protective device is to first move the fixing frame to the reserved hole, and then go through the following processes: Process 1: First, turn the knob to drive the second bevel gear to rotate through the second rotating rod, and then use the second bevel gear to turn the first bevel gear on one side to drive the threaded rod to rotate; Process 2: During the rotation of the threaded rod, the telescopic plate can be driven to telescope inside the mounting frame, and the pad can be driven to move, and then the inner wall of the reserved hole is inserted between the fixing frame and the pad, and then fixed by the cooperation of the positioning screw and the fastening nut; Step 3: Then take out the wrench and insert one end of the wrench into the first rotating rod and rotate it, and then drive the driving gear to rotate through the first rotating rod; Process 4: When the driving gear rotates, it drives the racks on the positive and negative sides to retract and move inward, and then drives the moving door to move and close synchronously through the fixed block, thereby achieving installation.

[0023] In summary, this application includes the following beneficial technical effects: The invention designs a telescopic component. Through the mutual cooperation between the telescopic component structures, the distance between the fixed frame and the pad can be adjusted arbitrarily within a suitable range, thereby realizing the installation of reserved openings of different widths. It is easy to install, realizes recycling, and reduces labor costs. The invention designs a switch assembly. When in use, the wrench is inserted into the driving mechanism and rotated, and then the movable door can be driven to open for use through the cooperation between multiple structures. After use, the movable door is closed, and then the wrench is taken out and stored in a storage box. In this way, the protective device cannot be opened without the wrench, so there is no need to worry about the protective device being accidentally opened, thereby avoiding accidents such as accidental injuries to people or the falling of small objects. When the invention is used, there is no need to pierce the wall, so that the floor slab will not be damaged, thereby ensuring the stability of the floor slab structure. At the same time, there is no need to worry about the subsequent difficulty in sealing the hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of this application; Figure 2 This is a rear view structural diagram of the present application; Figure 3 This is a first cross-sectional structural schematic diagram of the present application; Figure 4 For this application Figure 3 A schematic diagram of the structure enlargement in the middle; Figure 5 This is a second cross-sectional structural schematic diagram of the present application; Figure 6 For this application Figure 5 A magnified schematic diagram of the structure at B in the middle; Figure 7 This is a third cross-sectional structural schematic diagram of the present application.

[0025] Description of the numbers in the figure: 1. Sliding door; 2. Reflective strip; 3. Top plate; 4. Fixed frame; 5. Mounting frame; 6. Telescopic plate; 7. Pad; 8. Storage box; 9. Wrench; 10. Handle; 11. Positioning screw; 12. Fastening nut; 13. Threaded rod; 14. First bevel gear; 15. Second bevel gear; 16. Second rotating rod; 17. Knob; 18. First rotating rod; 19. Driving gear; 20. Rack; 21. Fixed plate; 22. Fixed block; 23. Bottom plate. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application; obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments, and all other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application without making creative work are within the scope of protection of the present application.

[0027] In the description of the present application, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. Example

[0029] The present application discloses a protective device for a reserved opening of a special-shaped curtain wall structure and a method for using the same. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 , including a fixing frame 4, a moving door 1 is symmetrically arranged on the front of the fixing frame 4, a top plate 3 is arranged on the top of the moving door 1, the back of the top plate 3 is fixedly installed on the top of the front of the fixing frame 4, the bottom end of the moving door 1 is slidably connected with a bottom plate 23, the back of the bottom plate 23 is fixedly installed on the bottom of the front of the fixing frame 4, a mounting frame 5 is arranged on the back of the fixing frame 4, a pad 7 is arranged on the back of the mounting frame 5, a slot is opened at the center of the top of the fixing frame 4, a storage box 8 is slidably inserted and connected inside the slot, a handle 10 is fixedly installed on the top of the storage box 8, and a telescopic component is arranged between the mounting frame 5 and the pad 7; A switch assembly is provided at the top of the movable door 1, and the switch assembly includes a wrench 9, a fixing block 22 and a driving mechanism. The wrench 9 is arranged inside the storage box 8, a cavity is provided inside the top plate 3, the driving mechanism is arranged inside the cavity, and two fixing blocks 22 are symmetrically arranged on both sides of the top plate 3.

[0030] See also Figure 5 , Figure 6 and Figure 7The driving mechanism includes a first rotating rod 18, a driving gear 19, a rack 20 and a fixed plate 21. A circular hole adapted to the first rotating rod 18 is opened at the top of the top plate 3. The first rotating rod 18 is rotatably connected inside the circular hole. A socket adapted to the wrench 9 is opened at the top of the first rotating rod 18.

[0031] Here, the wrench 9 is a hexagonal wrench 9, and the insertion hole at the top of the first rotating rod 18 is a hexagonal hole matching the hexagonal wrench 9. When idle, the wrench 9 can be placed in the storage box 8 for storage, thereby preventing it from being lost. After inserting one end of the wrench 9 into the interior of the first rotating rod 18, rotating the wrench 9 can drive the driving mechanism to operate.

[0032] See also Figure 5 , Figure 6 and Figure 7 The driving gear 19 is sleeved on the outside of the first rotating rod 18, and the two racks 20 are symmetrically arranged on the front and back sides of the first rotating rod 18, and the opposite sides of the two racks 20 are respectively meshed with the outer wall of the driving gear 19.

[0033] When the driving gear 19 rotates, the racks 20 on the positive and negative sides can be driven to move toward each other. When the driving gear 19 rotates clockwise, the racks 20 on the positive and negative sides will shrink and move inward. When the driving gear 19 rotates counterclockwise, the racks 20 on the positive and negative sides will spread and move outward.

[0034] See also Figure 5 , Figure 6 and Figure 7 The side of the rack 20 away from the first rotating rod 18 is slidably connected to the inner wall of the top plate 3, and the ends of the two racks 20 close to each other are fixedly connected to the opposite sides of the two fixed blocks 22, and the bottom end of the fixed block 22 is fixedly connected to the top side of the movable door 1.

[0035] The fixed block 22 is arranged at the top of the movable door 1 near the center of the top plate 3. The rack 20 and the movable door 1 are connected through the fixed block 22. Therefore, when the rack 20 moves, the movable door 1 at the bottom can be driven to move synchronously.

[0036] See also Figure 5 , Figure 6 and Figure 7 The fixed plate 21 is fixedly connected to the bottom of the top plate 3 , the bottom end of the first rotating rod 18 is rotatably connected to the top of the fixed plate 21 , and the bottom end of the fixed plate 21 is slidably connected to the top of the movable door 1 .

[0037] The fixing plate 21 is disposed at the bottom ends of the two racks 20 , and the first rotating rod 18 is installed in the middle of the fixing frame 4 through the fixing plate 21 .

[0038] See also Figure 2, Figure 3 and Figure 4 The telescopic mechanism includes a telescopic plate 6, a threaded rod 13, a first bevel gear 14, a second bevel gear 15 and a second rotating rod 16. A connecting groove is opened inside the mounting frame 5, and the telescopic plate 6 is slidably inserted and connected inside the connecting groove. The back side of the telescopic plate 6 is arranged on the front side of the pad 7.

[0039] During the movement of the telescopic plate 6 , the backing plate 7 can be driven to move synchronously, thereby adjusting the distance between the backing plate 7 and the fixing frame 4 .

[0040] See also Figure 2 , Figure 3 and Figure 4 A threaded hole matching the threaded rod 13 is provided inside the telescopic plate 6 , and the threaded rod 13 is rotatably connected to the inside of the telescopic plate 6 , and one end of the threaded rod 13 is rotatably connected to the inner wall of the mounting frame 5 .

[0041] When the threaded rod 13 rotates, the telescopic plate 6 can be driven to move inside the mounting frame 5. When the threaded rod 13 rotates clockwise, the telescopic plate 6 will move to the outside of the mounting frame 5. When the threaded rod 13 rotates counterclockwise, the telescopic plate 6 will move to the inside of the mounting frame 5.

[0042] See also Figure 2 , Figure 3 and Figure 4 The first bevel gear 14 is sleeved on an arm at one end of the threaded rod 13, the outer wall of the second bevel gear 15 is meshed with the outer wall of the first bevel gear 14, the side of the second bevel gear 15 away from the threaded rod 13 is fixedly connected to one end of the second rotating rod 16, and the other end of the second rotating rod 16 extends to the outside of the mounting frame 5 and is fixedly connected with a knob 17.

[0043] The second rotating rod 16 is driven to rotate by rotating the knob 17 , and then the threaded rod 13 is driven to rotate through the cooperation between the first bevel gear 14 and the second bevel gear 15 .

[0044] See also Figure 2 A reflective strip 2 is provided on the front of the movable door 1, and positioning screws 11 are symmetrically provided inside the pad 7. One end of the positioning screw 11 is fixedly connected to the back of the telescopic plate 6, and a fastening nut 12 is sleeved on the outside of the positioning screw 11.

[0045] By setting the reflective strip 2, it can play a reflective warning role at night, further improving the protection effect of the device. A threaded hole compatible with the positioning screw 11 is opened inside the fastening nut 12, and the fastening nut 12 is rotatably connected to the positioning screw 11.

[0046] See also Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 The operation of using the protective device is to first move the fixing frame 4 to the reserved hole, and then go through the following processes: Process 1: first, turn the knob 17 to drive the second bevel gear 15 to rotate through the second rotating rod 16, and then use the second bevel gear 15 to move the first bevel gear 14 on one side to drive the threaded rod 13 to rotate; Process 2: During the rotation of the threaded rod 13, the telescopic plate 6 can be driven to telescope inside the mounting frame 5, and the pad 7 can be driven to move, and then the inner wall of the reserved hole is inserted between the fixing frame 4 and the pad 7, and then fixed by the cooperation of the positioning screw 11 and the fastening nut 12; Process three: then take out the wrench 9 and insert one end of it into the first rotating rod 18, and rotate it, and then the first rotating rod 18 drives the driving gear 19 to rotate; Process 4: When the driving gear 19 rotates, it drives the racks 20 on the positive and negative sides to retract and move inward, and then drives the movable door 1 to move and close synchronously through the fixed block 22, thereby achieving installation.

[0047] The implementation principle of this embodiment is: first, the back side of the fixing frame 4 is tightly fitted with one side of the reserved hole, and then the knob 17 is rotated clockwise to drive the second bevel gear 15 to rotate through the second rotating rod 16. Since the first bevel gear 14 and the second bevel gear 15 are meshed, the first bevel gear 14 on one side can be driven by the second bevel gear 15 to drive the threaded rod 13 to rotate; Since the telescopic plate 6 is provided with a threaded hole adapted to the threaded rod 13, the threaded rod 13 can drive the telescopic plate 6 to move outward inside the mounting frame 5 during rotation, and drive the backing plate 7 to move, and then the inner wall of the reserved hole is inserted between the fixing frame 4 and the backing plate 7, and then fixed by the cooperation of the positioning screw 11 and the fastening nut 12; Then, pull the handle 10 to open the storage box 8, take out the wrench 9, and then insert one end of it into the insertion hole at the top of the first rotating rod 18 and rotate it clockwise, and then drive the driving gear 19 to rotate clockwise through the first rotating rod 18; When the driving gear 19 rotates, it can drive the racks 20 on the positive and negative sides to retract and move inward, and then drive the movable door 1 to move and close synchronously through the fixed block 22, thereby realizing the installation of the protective device.

[0048] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A protective device for a reserved opening of a special-shaped curtain wall structure, comprising a fixing frame (4), characterized in that: The front of the fixed frame (4) is symmetrically provided with a movable door (1), the top of the movable door (1) is provided with a top plate (3), the back of the top plate (3) is fixedly mounted on the top of the front of the fixed frame (4), the bottom of the movable door (1) is slidably connected with a bottom plate (23), the back of the bottom plate (23) is fixedly mounted on the bottom of the front of the fixed frame (4), a mounting frame (5) is provided on the back of the fixed frame (4), a pad (7) is provided on the back of the mounting frame (5), a slot is provided at the center of the top of the fixed frame (4), a storage box (8) is slidably inserted and connected inside the slot, a handle (10) is fixedly mounted on the top of the storage box (8), and a telescopic component is provided between the mounting frame (5) and the pad (7); A switch assembly is arranged at the top of the movable door (1), the switch assembly comprising a wrench (9), a fixing block (22) and a driving mechanism, the wrench (9) being arranged inside the storage box (8), a cavity being arranged inside the top plate (3), the driving mechanism being arranged inside the cavity, and two fixing blocks (22) being symmetrically arranged on both sides inside the top plate (3).

2. The protective device for reserved openings in a special-shaped curtain wall structure according to claim 1, characterized in that: The driving mechanism comprises a first rotating rod (18), a driving gear (19), a rack (20) and a fixing plate (21); a circular hole matching the first rotating rod (18) is provided at the top end of the top plate (3); the first rotating rod (18) is rotatably connected inside the circular hole; and a socket matching the wrench (9) is provided at the top end of the first rotating rod (18).

3. The protective device for reserved openings in a special-shaped curtain wall structure according to claim 2, characterized in that: The driving gear (19) is sleeved on the outside of the first rotating rod (18), and the two racks (20) are symmetrically arranged on the front and rear sides of the first rotating rod (18), and the opposite sides of the two racks (20) are respectively meshed with the outer wall of the driving gear (19).

4. The protective device for reserved openings in a special-shaped curtain wall structure according to claim 2, characterized in that: The side of the rack (20) away from the first rotating rod (18) is slidably connected to the inner wall of the top plate (3), and the ends of the two racks (20) close to each other are fixedly connected to the opposite sides of two fixed blocks (22), and the bottom ends of the fixed blocks (22) are fixedly connected to the top side of the movable door (1).

5. The protective device for reserved openings in a special-shaped curtain wall structure according to claim 2, characterized in that: The fixed plate (21) is fixedly connected to the bottom of the top plate (3), the bottom end of the first rotating rod (18) is rotatably connected to the top end of the fixed plate (21), and the bottom end of the fixed plate (21) is slidably connected to the top end of the movable door (1).

6. The protective device for reserved openings in special-shaped curtain wall structures according to claim 1, characterized in that: The telescopic mechanism comprises a telescopic plate (6), a threaded rod (13), a first bevel gear (14), a second bevel gear (15) and a second rotating rod (16); a connecting groove is provided inside the mounting frame (5); the telescopic plate (6) is slidably inserted and connected inside the connecting groove; and the back side of the telescopic plate (6) is arranged on the front side of the pad (7).

7. The protective device for reserved openings in a special-shaped curtain wall structure according to claim 6, characterized in that: A threaded hole matched with the threaded rod (13) is provided inside the telescopic plate (6); the threaded rod (13) is rotatably connected inside the telescopic plate (6); and one end of the threaded rod (13) is rotatably connected to the inner wall of the mounting frame (5).

8. The protective device for reserved openings in a special-shaped curtain wall structure according to claim 6, characterized in that: The first bevel gear (14) is sleeved on an arm at one end of the threaded rod (13); the outer wall of the second bevel gear (15) is meshed with the outer wall of the first bevel gear (14); the side of the second bevel gear (15) away from the threaded rod (13) is fixedly connected to one end of a second rotating rod (16); the other end of the second rotating rod (16) extends to the outside of the mounting frame (5) and is fixedly connected to a knob (17).

9. The protective device for reserved openings in special-shaped curtain wall structures according to claim 1, characterized in that: A reflective strip (2) is arranged on the front of the movable door (1), and positioning screws (11) are symmetrically arranged inside the pad (7), one end of the positioning screw (11) is fixedly connected to the back of the telescopic plate (6), and a fastening nut (12) is sleeved on the outside of the positioning screw (11).

10. A method for using a protective device for a reserved opening of a special-shaped curtain wall structure, characterized in that: The use of the protective device is to first move the fixing frame (4) to the reserved hole, and then go through the following steps: Process 1: first, the knob (17) is turned to drive the second bevel gear (15) to rotate via the second rotating rod (16), and then the first bevel gear (14) on one side is moved via the second bevel gear (15) to drive the threaded rod (13) to rotate; Process 2: During the rotation of the threaded rod (13), the telescopic plate (6) can be driven to telescope inside the mounting frame (5), and the pad (7) can be driven to move, and then the inner wall of the reserved hole is inserted between the fixing frame (4) and the pad (7), and then fixed by the cooperation of the positioning screw (11) and the fastening nut (12); Step three: then take out the wrench (9) and insert one end of the wrench into the first rotating rod (18), and rotate it, and then drive the driving gear (19) to rotate through the first rotating rod (18); Process 4: When the driving gear (19) rotates, the racks (20) on the positive and negative sides are driven to retract and move inward, and then the movable door (1) is driven to move and close synchronously through the fixed block (22), thereby achieving installation.

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