Corner assembling machine for door and window manufacturing and processing

Abstract

The utility model provides a corner combining machine for door and window manufacturing, which comprises an assembling platform, a fixing plate, a first slide rail, a second slide rail, a clamping plate, a first guide rail, a second guide rail and a limiting structure, the fixing plate is arranged on the upper surface of the assembling platform, the first slide rail is arranged at one end of the fixing plate, and the second slide rail is arranged at the other end of the fixing plate. A through groove is formed in the side surface of the fixing plate, a clamping plate is arranged in the through groove in the side surface of the fixing plate, a first guide rail is arranged at one end of the clamping plate, a second guide rail is arranged at the other end of the clamping plate, and the upper surface of the second guide rail and the upper surface of the second guide rail are each provided with a limiting structure. According to the utility model, through the arrangement of the limiting structure, the lower surface of the limiting plate is attached to the upper surface of the door and window frame, so that the door and window frame can be preliminarily fixed, the contact area between the limiting plate and the door and window frame is increased, the possibility that the door and window frame tilts to generate deformation is reduced, and the qualified rate of products is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of corner assembly machines, in particular to a corner assembly machine for manufacturing and processing doors and windows. Background Art

[0002] Corner machines are specialized equipment for the production of high-end thermally-insulated aluminum alloy doors and windows, suitable for 90-degree angle connections with angled structures. In some regions, they are also called corner extrusion machines, corner bumping machines, or edge corner machines. Depending on the angles that can be assembled, they are categorized as single-head, double-head, or four-head corner machines. These machines consist of a machine body, workbench, positioning cylinder, auxiliary positioner, punch riveter, corner cylinder, corner slide, electric control panel, and foot switch. The pneumatic system includes a solenoid valve, pressure gauge, mist eliminator, and water separator. The hydraulic system comprises a hydraulic pump, solenoid valve, high-pressure hose, and hydraulic relay.

[0003] After searching, it was found that the Chinese patent with application number 202223300997.1 discloses a corner assembly machine for door and window manufacturing and processing. When processing is required, the four groups of frame edges of the door and window are placed between the four groups of positioning plates, and then the four groups of frame edges are fixed by a fixing mechanism, and then the required two groups of frame edges are pressed by a clamping mechanism. At this time, the two groups of pressed frame edges can be angled by two groups of corner knife mechanisms. After the operation is completed, the processing plate is pulled toward the front side, and the connecting plate will leave the inside of the movable groove until the processing plate cannot be pulled. The processing plate is rotated ninety degrees and the processing plate is clamped into the inside of the installation groove again until the processing plate cannot move. At this time, the other two groups of frame edges can be angled. In this way, the angle assembly operation of the four corners can be completed in sequence, and finally the doors and windows are released through the fixing mechanism. The whole process only requires clamping or loosening the frame edges in turn, which is convenient for the operation of the staff. By turning on the drive motor, the output end of the drive motor starts to rotate. According to the different rotation directions of the output end, the rotation directions of the bidirectional threaded rod are different, so that the guide block can move closer to or away from the positioning block, thereby achieving the clamping or loosening operation of the frame edge. In addition, when pulling the connecting plate, due to the effect of the ball bearings, the friction between the connecting plate and the ground can be reduced, reducing the resistance of the ground to the connecting plate, making it easier for the operator to pull the connecting plate out of the movable groove.

[0004] Regarding the above technology, the inventor believes that the positioning plate is fixed and inconvenient to adjust, and the door and window frames have different sizes. If the door and window frames are too large, they cannot be placed between the positioning plates. At the same time, if the door and window frames are too small, there will be gaps between the door and window frames and the positioning plates. When the door and window frames are assembled at angles, the door and window frames will be dispersed, reducing the accuracy of the door and window frame assembly, making the angle assembly machine less versatile. At the same time, the clamping mechanism can only clamp the diagonal parts of the two sets of frame edges. The two sets of frame edges away from the clamping mechanism will warp and deform, reducing the product qualification rate. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a corner assembly machine for manufacturing and processing doors and windows.

[0006] The utility model provides an angle assembly machine for door and window manufacturing and processing, which comprises: an assembly platform, a fixed plate, a first slide rail, a second slide rail, a clamping plate, a first guide rail, a second guide rail and a limiting structure. The upper surface of the assembly platform is provided with a fixed plate, one end of the fixed plate is provided with the first slide rail, the other end of the fixed plate is provided with the second slide rail, a through groove is provided on the side surface of the fixed plate, a clamping plate is provided inside the through groove on the side surface of the fixed plate, the fixed plate and the clamping plate are cross-arranged, one end of the clamping plate is provided with the first guide rail, the other end of the clamping plate is provided with the second guide rail, and a group of limiting structures are respectively provided on the upper surface of the second slide rail and the upper surface of the second guide rail.

[0007] Preferably, a corner assembly is provided on the upper surface of the assembly platform, the corner assembly is provided on the outside of the second sliding rail and the second guide rail, door and window frames are provided on the inside of the second sliding rail and the second guide rail, and one side of the fixing plate and one side of the clamping plate are attached to the outer surface of the door and window frame.

[0008] Preferably, a through hole is provided on the outer surface of one end of the first slide rail, a first adjusting block is slidingly provided inside the first slide rail, a threaded hole is provided at one end of the first adjusting block, a screw is provided inside the threaded hole, one end of the screw is rotatably connected to the inner wall of the first slide rail, and the other end of the screw passes through the through hole on the outer surface of one end of the first slide rail and extends to the outer surface of the first slide rail, and the end of the screw extending to the outer surface of the first slide rail is fixedly connected to the first rotating wheel.

[0009] Preferably, a first sliding block is slidingly provided inside the second sliding rail, a through hole is opened at one end of the first sliding block, a first sliding rod is provided inside the through hole, both ends of the first sliding rod are respectively fixedly connected to the inner wall of the second sliding rail, one end of the fixed plate is fixedly connected to the outer surface of the first adjustment block, and the other end of the fixed plate is fixedly connected to the outer surface of the first sliding block.

[0010] Preferably, a through hole is provided on the outer surface of one end of the first guide rail, a second adjustment block is slidably arranged inside the first guide rail, a threaded hole is provided at one end of the second adjustment block, a screw rod is provided inside the threaded hole, one end of the screw rod is rotatably connected to the inner wall of the first guide rail, and the other end of the screw rod passes through the through hole on the outer surface of one end of the first guide rail and extends to the outer surface of the first guide rail, and the end of the screw rod extending to the outer surface of the first guide rail is fixedly connected to the second rotating wheel.

[0011] Preferably, a second sliding block is slidingly provided inside the second guide rail, a through hole is opened at one end of the second sliding block, a second sliding rod is provided inside the through hole, both ends of the second sliding rod are respectively fixedly connected to the inner wall of the second guide rail, one end of the clamping plate is fixedly connected to the outer surface of the second adjustment block, and the other end of the clamping plate is fixedly connected to the outer surface of the second sliding block.

[0012] Preferably, the limiting structure includes a mounting plate, a sleeve, a spring, a telescopic rod and a limiting plate, wherein one side of the mounting plate in one group of limiting structures is fixedly connected to the outer surface of the second slide rail, and one side of the mounting plate in the other group of limiting structures is fixedly connected to the outer surface of the second guide rail, one side of the mounting plate is fixedly connected to the sleeve, a spring is provided inside the sleeve, one end of the spring is fixedly connected to the inner wall of the sleeve, and the other end of the spring is fixedly connected to the telescopic rod, the end of the telescopic rod away from the spring passes through the sleeve and extends to the outer surface of the sleeve, the end of the telescopic rod away from the spring is fixedly connected to the limiting plate, and the lower surface of the limiting plate fits the upper surface of the door and window frame.

[0013] Compared with the related art, the corner assembly machine for door and window manufacturing provided by the present invention has the following beneficial effects:

[0014] The cam is secured to the second guide rail and is adapted to engage the first guide rail when the cam is engaged with the first guide rail. When the second rotating wheel rotates, it drives the screw rod to rotate inside the through hole on the outer surface of one end of the first guide rail. When the screw rod rotates, it is threadedly connected with the threaded hole at one end of the second adjusting block, so that the second adjusting block slides along the first guide rail. At the same time, the second sliding block slides along the outer surface of the second slide rod through the through hole at one end inside the second guide rail, thereby driving the clamping plate to slide along the through groove on the side surface of the fixing plate and fit into the outer surface of the door and window frame to fix the door and window frame. At this time, the operator can start the corner assembly to perform corner assembly operation on the door and window frame, which effectively improves the versatility of the corner assembly machine.

[0015] By setting a limiting structure, the operator first places the door and window frame on the upper surface of the assembly platform, the operator presses the limiting plate, and the limiting plate squeezes the telescopic rod, so that the telescopic rod enters the inside of the sleeve. While the telescopic rod enters the inside of the sleeve, it squeezes the spring, so that the spring is compressed to generate elastic force. The operator pushes the door and window frame where the corner needs to be assembled to the corner assembly. The operator releases the limiting plate. Under the elastic force of the spring, the telescopic rod pushes the limiting plate to reset, so that the lower surface of the limiting plate fits against the upper surface of the door and window frame, so that the door and window frame can be initially fixed. The limiting plate increases the contact area with the door and window frame, reduces the possibility of the door and window frame warping and deformation, and improves the product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic structural diagram of a preferred embodiment of a corner assembly machine for door and window manufacturing provided by the present invention;

[0017] Figure 2 This is a structural diagram of the utility model from another perspective;

[0018] Figure 3 It is a schematic diagram of the decomposed structure of the utility model;

[0019] Figure 4 For the utility model Figure 3 Schematic diagram of the enlarged structure at point A in the middle.

[0020] Numbers in the figure: 1. Assembly platform; 2. Fixed plate; 3. First slide rail; 4. Second slide rail; 5. Clamping plate; 6. First guide rail; 7. Second guide rail; 8. Limiting structure; 9. Corner assembly; 10. Door and window frame; 11. First adjusting block; 12. Screw; 13. First rotating wheel; 14. First sliding block; 15. First sliding rod; 16. Second adjusting block; 17. Screw; 18. Second rotating wheel; 19. Second sliding block; 20. Second sliding rod; 21. Mounting plate; 22. Sleeve; 23. Spring; 24. Telescopic rod; 25. Limiting plate. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and implementation examples.

[0022] Please refer to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 ,in, Figure 1 A schematic structural diagram of a preferred embodiment of a corner assembly machine for door and window manufacturing provided by the present invention; Figure 2 This is a structural diagram of the utility model from another perspective; Figure 3 It is a schematic diagram of the decomposed structure of the utility model; Figure 4 For the utility model Figure 3 The enlarged structural diagram at point A in the middle is shown. It includes: an assembly platform 1, a fixed plate 2, a first slide rail 3, a second slide rail 4, a clamping plate 5, a first guide rail 6, a second guide rail 7, and a limiting structure 8. The upper surface of the assembly platform 1 is provided with a fixed plate 2, one end of the fixed plate 2 is provided with the first slide rail 3, the other end of the fixed plate 2 is provided with the second slide rail 4, the side surface of the fixed plate 2 is provided with a through groove, the inside of the through groove on the side surface of the fixed plate 2 is provided with a clamping plate 5, the clamping plate 5 can slide inside the through groove on the side surface of the fixed plate 2, the fixed plate 2 and the clamping plate 5 are arranged in a cross-staggered manner, one end of the clamping plate 5 is provided with the first guide rail 6, the other end of the clamping plate 5 is provided with the second guide rail 7, and the upper surface of the second slide rail 4 and the upper surface of the second guide rail 7 are respectively provided with a set of limiting structures 8. The limiting structures 8 facilitate the fitting of the door and window edges to the assembly platform 1.

[0023] In the specific implementation process, Figure 1 、 Figure 2、 Figure 3 and Figure 4 As shown, a corner assembly component 9 is provided on the upper surface of the assembly platform 1, and the corner assembly component 9 is provided on the outside of the second slide rail 4 and the second guide rail 7. A door and window frame 10 is provided on the inside of the second slide rail 4 and the second guide rail 7. The corner assembly component 9 facilitates the corner assembly of the door and window frame 10. One side of the fixing plate 2 and one side of the clamping plate 5 are attached to the outer surface of the door and window frame 10. The fixing rod and the clamping plate 5 prevent the door and window frame 10 from being offset during corner assembly.

[0024] Among them, a through hole is provided on the outer surface of one end of the first slide rail 3, and a first adjusting block 11 is slidingly provided inside the first slide rail 3. A threaded hole is provided at one end of the first adjusting block 11, and a screw 12 is provided inside the threaded hole. The screw 12 is threadedly connected to the threaded hole, and one end of the screw 12 is rotatably connected to the inner wall of the first slide rail 3, and the other end of the screw 12 passes through the through hole on the outer surface of one end of the first slide rail 3 and extends to the outer surface of the first slide rail 3. The screw 12 extends to the outer surface of the first slide rail 3 and is fixedly connected to one end thereof. The first rotating wheel 13 is convenient for the operator to hold and rotate. The operator holds and rotates the first rotating wheel 13. The rotation of the first rotating wheel 13 drives the screw 12 to rotate inside the through hole on the outer surface of one end of the first slide rail 3, and when the screw 12 rotates, it is threadedly connected to the threaded hole at one end of the first adjusting block 11, so that the first adjusting block 11 slides along the first slide rail 3.

[0025] Among them, a first sliding block 14 is provided for sliding inside the second slide rail 4, and the first sliding block 14 can slide inside the second slide rail 4. A through hole is opened at one end of the first sliding block 14, and a first sliding rod 15 is provided inside the through hole. The first sliding block 14 can slide along the outer surface of the first sliding rod 15 through the through hole at one end. Both ends of the first sliding rod 15 are respectively fixedly connected to the inner wall of the second slide rail 4, and the first sliding rod 15 can make the first sliding block 14 slide linearly inside the second slide rail 4, playing a role of assisting the sliding of the fixed plate 2. One end of the fixed plate 2 is fixedly connected to the outer surface of the first adjusting block 11, and the other end of the fixed plate 2 is fixedly connected to the outer surface of the first sliding block 14. When the first adjusting block 11 moves along the first slide rail 3, it can drive the fixed plate 2 to move.

[0026] Among them, a through hole is provided on the outer surface of one end of the first guide rail 6, and a second adjusting block 16 is slidably provided inside the first guide rail 6, and a threaded hole is provided at one end of the second adjusting block 16, and a screw rod 17 is provided inside the threaded hole, and the screw rod 17 is threadedly connected to the threaded hole at one end of the second adjusting block 16, and one end of the screw rod 17 is rotatably connected to the inner wall of the first guide rail 6, and the other end of the screw rod 17 passes through the through hole on the outer surface of one end of the first guide rail 6 and extends to the outer surface of the first guide rail 6. The screw rod 17 can rotate inside the through hole on the outer surface of one end of the first guide rail 6, and the screw rod 17 extends to one end of the outer surface of the first guide rail 6 and is fixedly connected to the second rotating wheel 18. The second rotating wheel 18 is convenient for the operator to hold and rotate. The operator holds and rotates the second rotating wheel 18. When the second rotating wheel 18 rotates, it drives the screw rod 17 to rotate inside the through hole on the outer surface of one end of the first guide rail 6, and when the screw rod 17 rotates, it is threadedly connected to the threaded hole at one end of the second adjusting block 16, so that the second adjusting block 16 slides along the first guide rail 6.

[0027] Among them, a second sliding block 19 is provided for sliding inside the second guide rail 7, and the second sliding block 19 can slide inside the second guide rail 7. A through hole is opened at one end of the second sliding block 19, and a second sliding rod 20 is provided inside the through hole. The second sliding block 19 can slide along the outer surface of the second sliding rod 20 through the through hole at one end. Both ends of the second sliding rod 20 are respectively fixedly connected to the inner wall of the second guide rail 7. The second sliding rod 20 can make the second sliding block 19 slide linearly inside the second guide rail 7, thereby assisting the sliding of the clamping plate 5. One end of the clamping plate 5 is fixedly connected to the outer surface of the second adjusting block 16, and the other end of the clamping plate 5 is fixedly connected to the outer surface of the second sliding block 19. When the second adjusting block 16 moves along the first guide rail 6, it can drive the clamping plate 5 to move.

[0028] Among them, the limiting structure 8 includes a mounting plate 21, a sleeve 22, a spring 23, a telescopic rod 24 and a limiting plate 25. One side of the mounting plate 21 in one group of limiting structures 8 is fixedly connected to the outer surface of the second slide rail 4, and one side of the mounting plate 21 in the other group of limiting structures 8 is fixedly connected to the outer surface of the second guide rail 7. One side of the mounting plate 21 is fixedly connected to the sleeve 22, and a spring 23 is provided inside the sleeve 22. One end of the spring 23 is fixedly connected to the inner wall of the sleeve 22, and the other end of the spring 23 is fixedly connected to the telescopic rod 24. The telescopic rod 24 extends away from one end of the spring 23 through the sleeve 22 to the outer surface of the sleeve 22. The telescopic rod 24 can be telescoped inside the sleeve 22. One end away from the spring 23 is fixedly connected to the limit plate 25, and the lower surface of the limit plate 25 is in contact with the upper surface of the door and window frame 10. The operator presses the limit plate 25, and the limit plate 25 squeezes the telescopic rod 24, so that the telescopic rod 24 enters the inside of the sleeve 22. While the telescopic rod 24 enters the inside of the sleeve 22, it squeezes the spring 23, so that the spring 23 is compressed to generate elastic force. The operator pushes the door and window frame 10 where the corner needs to be assembled to the corner assembly 9. The operator releases the limit plate 25. Under the elastic force of the spring 23, the telescopic rod 24 pushes the limit plate 25 to reset, so that the lower surface of the limit plate 25 is in contact with the upper surface of the door and window frame 10, so that the door and window frame 10 can be initially fixed.

[0029] The working principle provided by the utility model is as follows: the operator first places the door and window frame 10 on the upper surface of the assembly platform 1, the operator presses the limit plate 25, and the limit plate 25 squeezes the telescopic rod 24, so that the telescopic rod 24 enters the inside of the sleeve 22. When the telescopic rod 24 enters the inside of the sleeve 22, it squeezes the spring 23, so that the spring 23 is compressed to generate elastic force, and the operator pushes the door and window frame 10 to the corner where it needs to be assembled to the corner assembly 9, and the operator releases the limit plate 25. Under the elastic action of the spring 23, the telescopic rod 24 pushes the limit plate 25 to reset, so that the lower surface of the limit plate 25 is in contact with the upper surface of the door and window frame 10, so that the door and window frame 10 can be initially fixed. The operator first holds and rotates the first rotating wheel 13. The rotation of the first rotating wheel 13 drives the screw 12 to rotate inside the through hole on the outer surface of one end of the first slide rail 3, and when the screw 12 rotates, it is threadedly connected to the threaded hole at one end of the first adjusting block 11, so that the first adjusting block 11 slides along the first slide rail 3 When the second wheel 18 rotates, it drives the screw rod 17 to rotate inside the through hole on the outer surface of one end of the first guide rail 6. When the screw rod 17 rotates, it is threadedly connected with the threaded hole on one end of the second adjusting block 16, so that the second adjusting block 16 slides along the first guide rail 6. At the same time, the second sliding block 19 slides along the outer surface of the second slide rod 20 through the through hole on one end of the second guide rail 7, thereby driving the clamping plate 5 to slide along the through groove on the side surface of the fixing plate 2 and fit into the outer surface of the door and window frame 10, fixing the door and window frame 10. At this time, the operator can start the corner assembly 9 to perform the corner assembly operation on the door and window frame 10. When the door and window frame 10 needs to be removed, the first wheel 13 and the second wheel 18 are reversed, and the limit plate 25 is squeezed to remove the door and window frame 10.

[0030] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0031] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A corner assembly machine for door and window manufacturing, comprising: An assembly platform (1), a fixed plate (2), a first slide rail (3), a second slide rail (4), a clamping plate (5), a first guide rail (6), a second guide rail (7) and a limiting structure (8) are characterized in that a fixed plate (2) is provided on the upper surface of the assembly platform (1), a first slide rail (3) is provided at one end of the fixed plate (2), a second slide rail (4) is provided at the other end of the fixed plate (2), a through groove is provided on the side surface of the fixed plate (2), a clamping plate (5) is provided inside the through groove on the side surface of the fixed plate (2), the fixed plate (2) and the clamping plate (5) are cross-arranged, a first guide rail (6) is provided at one end of the clamping plate (5), a second guide rail (7) is provided at the other end of the clamping plate (5), and a group of limiting structures (8) are respectively provided on the upper surface of the second slide rail (4) and the upper surface of the second guide rail (7).

2. The corner combination machine for door and window manufacturing according to claim 1, characterized in that: The upper surface of the assembly platform (1) is provided with a corner assembly component (9), which is arranged outside the second slide rail (4) and the second guide rail (7), and a door and window frame (10) is provided inside the second slide rail (4) and the second guide rail (7), and one side of the fixing plate (2) and one side of the clamping plate (5) are attached to the outer surface of the door and window frame (10).

3. The corner combination machine for door and window manufacturing according to claim 1, characterized in that: A through hole is provided on the outer surface of one end of the first slide rail (3), a first adjusting block (11) is slidably provided inside the first slide rail (3), a threaded hole is provided on one end of the first adjusting block (11), a screw rod (12) is provided inside the threaded hole, one end of the screw rod (12) is rotatably connected to the inner wall of the first slide rail (3), the other end of the screw rod (12) passes through the through hole on the outer surface of one end of the first slide rail (3) and extends to the outer surface of the first slide rail (3), and one end of the screw rod (12) extending to the outer surface of the first slide rail (3) is fixedly connected to the first rotating wheel (13).

4. The corner combination machine for door and window manufacturing according to claim 1, characterized in that: A first sliding block (14) is slidably provided inside the second slide rail (4), a through hole is provided at one end of the first sliding block (14), a first sliding rod (15) is provided inside the through hole, both ends of the first sliding rod (15) are fixedly connected to the inner wall of the second slide rail (4), one end of the fixed plate (2) is fixedly connected to the outer surface of the first adjustment block (11), and the other end of the fixed plate (2) is fixedly connected to the outer surface of the first sliding block (14).

5. The corner combination machine for door and window manufacturing according to claim 1, characterized in that: A through hole is provided on the outer surface of one end of the first guide rail (6), a second adjustment block (16) is slidably provided inside the first guide rail (6), a threaded hole is provided on one end of the second adjustment block (16), a screw rod (17) is provided inside the threaded hole, one end of the screw rod (17) is rotatably connected to the inner wall of the first guide rail (6), the other end of the screw rod (17) passes through the through hole on the outer surface of one end of the first guide rail (6) and extends to the outer surface of the first guide rail (6), and one end of the screw rod (17) extending to the outer surface of the first guide rail (6) is fixedly connected to the second rotating wheel (18).

6. The corner combination machine for door and window manufacturing according to claim 1, characterized in that: A second sliding block (19) is slidably provided inside the second guide rail (7), a through hole is provided at one end of the second sliding block (19), a second sliding rod (20) is provided inside the through hole, and both ends of the second sliding rod (20) are fixedly connected to the inner wall of the second guide rail (7), one end of the clamping plate (5) is fixedly connected to the outer surface of the second adjustment block (16), and the other end of the clamping plate (5) is fixedly connected to the outer surface of the second sliding block (19).

7. The corner combination machine for door and window manufacturing according to claim 1, characterized in that: The limiting structure (8) comprises a mounting plate (21), a sleeve (22), a spring (23), a telescopic rod (24) and a limiting plate (25), wherein one side of the mounting plate (21) in one group of limiting structures (8) is fixedly connected to the outer surface of the second slide rail (4), and one side of the mounting plate (21) in the other group of limiting structures (8) is fixedly connected to the outer surface of the second guide rail (7); one side of the mounting plate (21) is fixedly connected to the sleeve (22), a spring (23) is arranged inside the sleeve (22), one end of the spring (23) is fixedly connected to the inner wall of the sleeve (22), the other end of the spring (23) is fixedly connected to the telescopic rod (24), the end of the telescopic rod (24) away from the spring (23) passes through the sleeve (22) and extends to the outer surface of the sleeve (22), the end of the telescopic rod (24) away from the spring (23) is fixedly connected to the limiting plate (25), and the lower surface of the limiting plate (25) is in contact with the upper surface of the door and window frame (10).

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