Punching device for antibacterial polyurethane film roll

Abstract

The invention provides an antibacterial polyurethane film roll hole pricking device, and relates to the field of film hole pricking. The antibacterial polyurethane film roll pricking device comprises a bottom plate, a first supporting frame is fixedly connected to one side of the upper end of the bottom plate, a connecting column is rotationally connected to the upper end of the first supporting frame through a bearing, a mounting column is fixedly connected to one end of the connecting column, and a connecting block is slidably connected to one end of the mounting column; and a rotating roller is slidably connected to the interior of one end of the connecting block, two jackscrews are connected to the interior of the connecting block in a threaded mode, one ends of the two jackscrews abut against the mounting column and the surface of the rotating roller correspondingly, and a second supporting frame is fixedly connected to the side, away from the first supporting frame, of the upper end of the bottom plate. According to the film punching device, the bolts are used for connecting the mounting plates at the same time, the needle heads are connected into the mounting plates through the threaded heads, and the hole distance of film punching can be conveniently adjusted by increasing and decreasing the number of the mounting plates and the needle heads during use, so that the film punching device is suitable for punching requirements of different specifications, and the application range is wider.

Description

Technical Field

[0001] This invention relates to the field of film punching, specifically to a film punching device for antibacterial polyurethane films. Background Technology

[0002] Agricultural films are mainly used to cover soil or crops, serving functions such as heat preservation, moisture retention, and weed control. However, crop growth requires a certain degree of air permeability to prevent root rot caused by insufficient oxygen or excessive moisture in the soil. Therefore, during the production of agricultural and packaging films, perforations are usually made on the film surface to give it air permeability while maintaining its heat preservation and moisture retention functions.

[0003] Currently, perforations are typically made directly on the film using pin arrays, which makes it difficult to control the spacing of the perforations. To address this, a perforation device for antibacterial polyurethane film rolls is proposed. Summary of the Invention

[0004] 1. Technical problems to be solved To address the shortcomings of existing technologies, this invention provides an antibacterial polyurethane film rolling and punching device, which solves the problem that currently, holes are usually punched directly into the film using a row of needles, making it difficult to control the spacing of the holes.

[0005] 2. Technical Solution To achieve the above objectives, the present invention provides the following technical solution: An antibacterial polyurethane film winding and punching device includes a base plate. A first support frame is fixedly connected to one side of the upper end of the base plate. A connecting column is rotatably connected to the upper end of the first support frame via a bearing. A mounting column is fixedly connected to one end of the connecting column. A connecting block is slidably connected to one end of the mounting column. A rotating roller is slidably connected inside one end of the connecting block. Two set screws are threaded inside the connecting block. One end of each set screw abuts against the surfaces of the mounting column and the rotating roller, respectively. A second support frame is fixedly connected to the upper end of the base plate away from the first support frame. The second support frame is rotatably connected to the rotating roller. A support roller is rotatably connected between the first support frame and the second support frame at the lower end of the rotating roller. The surface of the support roller has multiple clearance grooves arranged in a linear array and corresponding to the needles. The rotating roller has multiple equally spaced mounting grooves on its surface. The rotating roller has threaded holes on both sides inside the mounting grooves. Mounting plates are slidably connected inside the multiple mounting grooves. Bolts corresponding to the threaded holes are slidably connected to both ends of the mounting plates. One end of the bolt passes through the mounting plate and is threaded to the threaded hole. Multiple threaded heads arranged in a straight array are threaded inside the multiple mounting plates. A needle is fixedly connected to one end of each threaded head. Through the above technical solution, multiple equally spaced mounting grooves are opened on the surface of the mounting roller. Mounting plates are bolted into each groove, and multiple threaded heads arranged in a linear array are set inside the mounting plates. One end of each threaded head is fixedly connected to a needle, forming a uniformly distributed needle array. Because the mounting grooves and threaded heads are equally spaced, the spacing between the needles can be precisely controlled. This minimizes the problem of uneven spacing in traditional needle-punching methods. Furthermore, the bolted mounting plates and threaded needle connections allow for easy adjustment of the perforation spacing by adding or removing mounting plates and needles, making it suitable for different perforation requirements and broadening its applicability. An L-shaped mounting component is provided at the upper end of the first support frame, with one end of the L-shaped mounting component... The correction sensor has a fixed plate fixedly connected between two first fixed frames. A slide is set in the middle of the fixed plate. A threaded rod is rotatably connected between two connecting frames. The threaded rod is fixedly connected to the output end of a second motor. The slide and the threaded rod are threadedly connected. In use, the film is passed through the top of the first traction roller while keeping the film between the two sensors of the correction sensor. When the position of the film shifts during use, the correction sensor sends a signal. After being processed by the controller, the second motor is started. The second motor drives the threaded rod to rotate, thereby moving the slide and the fixed plate, which in turn moves the two first fixed frames and the first traction roller, thus moving the film on the first traction roller and returning the film to its correct position. This ensures more accurate perforation and improves perforation quality during use.

[0006] Furthermore, a mounting bracket is fixedly connected to one side surface of the first support frame, a first motor is fixedly connected to the upper end of the mounting bracket, and a drive wheel is fixedly connected to the output end of the first motor; With the above technical solution, the first motor is started when in use, and the first motor drives the drive wheel to rotate through the output end.

[0007] Furthermore, a driven wheel is fixedly connected to one end of the connecting column, and the driven wheel meshes with the driving wheel; With the above technical solution, the first motor starts and drives the driving wheel to rotate. The driving wheel, through meshing with the driven wheel, drives the driven wheel to rotate.

[0008] Furthermore, two slide rails are fixedly connected to both sides of the upper end of the base plate, and sliders are slidably connected to the surfaces of the four slide rails. The upper ends of two sliders on the same side of the four sliders are respectively fixedly connected to a first fixed frame, and a first traction roller is rotatably connected between the two first fixed frames. With the above technical solution, the first traction roller is rotatably connected between the two first fixed frames and is used to pull the film. The position of the first traction roller can be adjusted by sliding the slider on the slide rail.

[0009] Furthermore, two connecting frames are fixedly connected to the upper end of the base plate near the first fixed frame, and a threaded rod is rotatably connected between the two connecting frames. A second motor is fixedly connected to the surface of one of the two connecting frames, and the output end of the second motor is fixedly connected to one end of the threaded rod. With the above technical solution, when the second motor is started during use, the second motor will drive the threaded rod to rotate synchronously through the output end.

[0010] Furthermore, a fixing plate is fixedly connected between the two first fixing frames, and a slide is fixedly connected to the middle of the fixing plate, and the slide is threadedly connected to the threaded rod; With the above technical solution, the second motor starts and drives the threaded rod to rotate. The rotational motion of the threaded rod is transmitted to the slide table through the threaded connection, which drives the slide table to move. The movement of the slide table is transmitted to the first fixed frame through the fixed plate to achieve position adjustment.

[0011] Furthermore, two second fixed frames are fixedly connected to the upper end of the base plate on the side away from the first and second support frames, and a second traction roller is rotatably connected between the two second fixed frames; With the above technical solution, the film is pulled by the second traction roller, which rotates between the two second fixed frames to ensure smooth film transport.

[0012] Furthermore, a controller is fixedly connected to the upper end of the base plate near the first support frame, and an L-shaped mounting piece is fixedly connected to the upper end of one side of the first support frame. A correction sensor is fixedly connected to one end of the L-shaped mounting piece, and both the correction sensor and the second motor are electrically connected to the controller. Through the above technical solution, the correction sensor is used to detect the positional offset of the film and send the signal to the controller. The controller receives the signal from the correction sensor, controls the second motor to start, drives the threaded rod to rotate, and moves the slide table to adjust the position of the film.

[0013] 3. Beneficial effects This invention provides a device for winding holes in an antibacterial polyurethane film. It has the following beneficial effects: 1. This invention provides an antibacterial polyurethane film rolling and punching device. Multiple equally spaced mounting grooves are opened on the surface of the mounting roller. Mounting plates are bolted into each mounting groove. Multiple threaded heads arranged in a linear array are set inside the mounting plates. A needle is fixedly connected to one end of each threaded head, forming a uniformly distributed needle array. Because the mounting grooves and threaded heads are equally spaced, the spacing between the needles can be precisely controlled. This minimizes the problem of uneven spacing in traditional needle punching during the punching process. Furthermore, the use of bolts to connect the mounting plates and the threaded heads connecting the needles within the mounting plates allows for easy adjustment of the hole spacing by adding or removing mounting plates and needles, thus adapting to different punching requirements and broadening its applicability.

[0014] 2. This invention provides an antibacterial polyurethane film rolling and punching device. An L-shaped mounting component is installed on the upper end of a first support frame, with a correction sensor at one end. A fixed plate is fixedly connected between two first fixed frames, and a slide is located in the middle of the fixed plate. A threaded rod is rotatably connected between two connecting frames, and the threaded rod is fixedly connected to the output end of a second motor. The slide and the threaded rod are threadedly connected. During use, the film passes through the upper end of the first traction roller while maintaining the film between the two sensors of the correction sensor. When the film's position shifts during use, the correction sensor sends a signal. After processing by the controller, the second motor is activated. The second motor then drives the threaded rod to rotate, thereby moving the slide and the fixed plate, further moving the two first fixed frames and the first traction roller, and thus moving the film on the first traction roller, thereby correcting the film's position. This ensures more accurate punching and improves punching quality. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the support roller mounting structure of the present invention; Figure 3 This is a schematic diagram of the mounting slot structure of the present invention; Figure 4 for Figure 2 Enlarged view of the structure at point A in the middle; Figure 5 for Figure 3 Enlarged view of the structure at point B in the middle; Figure 6 for Figure 3 Enlarged view of the structure at point C; Figure 7 for Figure 1 Enlarged view of the structure at point D; Figure 8 for Figure 1Enlarged view of the structure at point E in the middle.

[0016] The components are as follows: 1. Base plate; 2. First support frame; 3. Second support frame; 4. Connecting column; 5. Driven wheel; 6. Mounting frame; 7. First motor; 8. Drive wheel; 9. Mounting column; 10. Connecting block; 11. Set screw; 12. Rotating roller; 13. Support roller; 14. Relief groove; 15. Mounting groove; 16. Threaded hole; 17. Mounting plate; 18. Bolt; 19. Threaded head; 20. Needle; 21. Slide rail; 22. Slider; 23. First fixed frame; 24. Fixed plate; 25. Slide table; 26. Connecting frame; 27. Threaded rod; 28. Second motor; 29. ​​First traction roller; 30. L-shaped mounting part; 31. Correction sensor; 32. Second fixed frame; 33. Second traction roller; 34. Controller. Detailed Implementation

[0017] The technical solutions of the specific embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described specific embodiments are only a part of the specific embodiments of the present invention, and not all of them. Based on the specific embodiments of the present invention, all other specific embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Specific implementation method 1: like Figure 1-8 As shown, a specific embodiment of the present invention provides an antibacterial polyurethane film roll-up hole device, including a base plate 1. A first support frame 2 is fixedly connected to one side of the upper end of the base plate 1. A connecting column 4 is rotatably connected to the upper end of the first support frame 2 via a bearing. A mounting column 9 is fixedly connected to one end of the connecting column 4. A connecting block 10 is slidably connected to one end of the mounting column 9. A rotating roller 12 is slidably connected inside one end of the connecting block 10. Two set screws 11 are internally threaded to the connecting block 10. One end of each set screw 11 abuts against the surfaces of the mounting column 9 and the rotating roller 12, respectively. A second support frame 3 is fixedly connected to the side of the upper end of the base plate 1 away from the first support frame 2. The second support frame 3 is rotatably connected to the rotating roller 12. The first support frame 2 and the second support frame 3 are rotatably connected. A support roller 13 is rotatably connected between the support frame 3 at the lower end of the rotating roller 12. The surface of the support roller 13 has multiple clearance grooves 14 arranged in a straight array and corresponding to the needle 20. The surface of the rotating roller 12 has multiple equally spaced mounting grooves 15. Threaded holes 16 are opened on both sides of the rotating roller 12 inside the mounting grooves 15. Mounting plates 17 are slidably connected inside the multiple mounting grooves 15. Bolts 18 corresponding to the threaded holes 16 are slidably connected to both ends of the mounting plates 17. One end of the bolt 18 passes through the mounting plate 17 and is threadedly connected to the threaded hole 16. Multiple threaded heads 19 arranged in a straight array are threadedly connected inside the multiple mounting plates 17. One end of the threaded head 19 is fixedly connected to the needle 20. A mounting bracket 6 is fixedly connected to one side surface of the first support frame 2. A first motor 7 is fixedly connected to the upper end of the mounting bracket 6. A drive wheel 8 is fixedly connected to the output end of the first motor 7. When in use, the first motor 7 is started, and the first motor 7 drives the drive wheel 8 to rotate through the output end. A driven wheel 5 is fixedly connected to one end of the connecting column 4. The driven wheel 5 and the drive wheel 8 are meshed. When the first motor 7 is started, it drives the drive wheel 8 to rotate. The drive wheel 8 drives the driven wheel 5 to rotate through meshing with the driven wheel 5. Two slide rails 21 are fixedly connected to both sides of the upper end of the base plate 1. Slider 22s are slidably connected to the surfaces of all four slide rails 21. Two sliders 22 on the same side of the four sliders 22 are each fixedly connected to a first fixing frame 23. A first traction roller 29 is rotatably connected between the two first fixing frames 23. The first traction roller 29, rotatably connected between the two first fixing frames 23, is used to pull the film. The position of the first traction roller 29 can be adjusted by sliding the slider 22 on the slide rails 21. Two connecting frames 26 are fixedly connected to the upper end of the base plate 1 near the first fixing frames 23. A threaded rod 27 is rotatably connected between the two connecting frames 26. A second motor 28 is fixedly connected to the surface of a connecting frame 26. The output end of the second motor 28 is fixedly connected to one end of the threaded rod 27. When in use, the second motor 28 is started, and the second motor 28 will drive the threaded rod 27 to rotate synchronously through the output end. A fixing plate 24 is fixedly connected between the two first fixing frames 23. A slide table 25 is fixedly connected to the middle of the fixing plate 24. The slide table 25 is threadedly connected to the threaded rod 27. When the second motor 28 is started, it drives the threaded rod 27 to rotate. The rotational motion of the threaded rod 27 is transmitted to the slide table 25 through the threaded connection, which drives the slide table 25 to move. The movement of the slide table 25 is transmitted to the first fixing frame 23 through the fixing plate 24 to realize position adjustment. Two second fixed frames 32 are fixedly connected to the upper end of the base plate 1 away from the first support frame 2 and the second support frame 3. A second traction roller 33 is rotatably connected between the two second fixed frames 32. The film is pulled by the second traction roller 33, which rotates between the two second fixed frames 32 to ensure smooth film transport. A controller 34 is fixedly connected to the upper end of the base plate 1 near the first support frame 2. An L-shaped mounting part 30 is fixedly connected to the upper end of one side of the first support frame 2. A correction sensor 31 is fixedly connected to one end of the L-shaped mounting part 30. The correction sensor 31 and the second motor 28 are both electrically connected to the controller 34. The correction sensor 31 is used to detect the positional deviation of the film and send the signal to the controller 34. The controller 34 receives the signal from the correction sensor 31 and controls the second motor 28 to start, driving the threaded rod 27 to rotate and moving the slide table 25 to adjust the position of the film.

[0019] In this embodiment, a first support frame 2 and a second support frame 3 are fixedly connected to the upper end of the base plate 1. A connecting column 4 is fixedly connected between the first support frame 2 and the second support frame 3. A driven wheel 5 is rotatably connected to the connecting column 4. A mounting frame 6 is fixedly connected to the upper end of the first support frame 2. A first motor 7 is fixedly connected inside the mounting frame 6. A driving wheel 8 is fixedly connected to the output end of the first motor 7. The driving wheel 8 and the driven wheel 5 are connected by a belt. A mounting column 9 is fixedly connected to the upper end of the second support frame 3. A connecting block 10 is fixedly connected to the upper end of the mounting column 9. A rotating roller 12 is fixedly connected inside the connecting block 10 by a set screw 11. A support roller 13 is fixedly connected to the upper end of the base plate 1. Multiple equally spaced clearance grooves 14 are formed on the surface of the rotating roller 12. An installation groove 15 is formed inside the clearance grooves 14. A threaded hole 16 is provided inside the mounting groove 15. A mounting plate 17 is connected to the mounting groove 15 by bolts 18. Multiple threaded heads 19 are arranged in a linear array inside the mounting plate 17. One end of each threaded head 19 is fixedly connected to a needle 20, forming a uniformly distributed needle array. Since the mounting groove 15 and the threaded heads 19 are designed to be equidistant, the spacing between the needles 20 can be precisely controlled. During the drilling process, the problem of uneven spacing in traditional pin-punching can be avoided as much as possible. At the same time, the mounting plate 17 is connected by bolts 18, and the needles 20 are connected to the mounting plate 17 by threaded heads 19. During use, the hole spacing of the film can be easily adjusted by adding or removing the number of mounting plates 17 and needles 20, so as to meet the drilling needs of different specifications and have a wider range of applications. A slide rail 21 is fixedly connected to the upper end of the base plate 1. A slider 22 is slidably connected to the slide rail 21. A first fixed frame 23 is fixedly connected to the upper end of the slider 22. A fixed plate 24 is fixedly connected between the two first fixed frames 23. A slide table 25 is provided in the middle of the fixed plate 24. A connecting frame 26 is fixedly connected between the two first fixed frames 23. A threaded rod 27 is rotatably connected between the two connecting frames 26. The threaded rod 27 is fixedly connected to the output end of the second motor 28. The slide table 25 is threadedly connected to the threaded rod 27. A first traction roller 29 is rotatably connected to the upper end of the first fixed frame 23. An L-shaped mounting part 30 is provided on the upper end of the first support frame 2. A correction sensor 31 is provided at one end of the L-shaped mounting part 30. A second fixed frame 32 is fixedly connected to the upper end of the base plate 1. A second traction roller 33 is rotatably connected to the upper end of the second fixed frame 32, and a controller 34 is fixedly connected to the upper end of the base plate 1. During use, the film passes through the upper end of the first traction roller 29 while keeping the film between the two sensors of the correction sensor 31. When the position of the film shifts during use, the correction sensor 31 sends a signal, which is then processed by the controller 34 to start the second motor 28. The second motor 28 then drives the threaded rod 27 to rotate, thereby moving the slide table 25 and the fixed plate 24, which in turn moves the two first fixed frames 23 and the first traction roller 29, thus moving the film on the first traction roller 29 and correcting the position of the film. This ensures more accurate punching and improves punching quality during use.

[0020] Working principle: The antibacterial polyurethane film roll is passed through the lower end of the second traction roller 33, and then through the first traction roller 29, ensuring that the starting end of the film is flat. The film is then passed between the rotating roller 12 and the support roller 13. According to the perforation requirements, a suitable mounting plate 17 and needles 20 are selected. The mounting plate 17 is inserted into the mounting groove 15 on the surface of the rotating roller 12 and fixed with bolts 18. The number and distribution of the needles 20 are adjusted to ensure that the spacing between the needles meets the design requirements, and that the film is positioned between the two sensors of the correction sensor 31. The first motor 7 is started, which drives the driving wheel 8 to rotate. The driving wheel 8, through meshing with the driven wheel 5, drives the rotating roller 12 to rotate. The rotation of the rotating roller 12 drives the needles 20 to punch holes in the film. The needles 20 on the surface of the rotating roller 12 punch holes in the film during rotation. The spacing of the needles 20 is precisely controlled by the equidistant distribution of the mounting groove 15 and the threaded head 19 to ensure uniform punching. The clearance groove 14 on the surface of the support roller 13 ensures that the needles 20 do not interfere with the support roller 13 during punching. The first traction roller 29 and The second traction roller 33 rotates synchronously to ensure smooth film transport. As the film passes between the rotating roller 12 and the support roller 13, the needle 20 makes uniform holes on the film surface. The clearance groove 14 on the surface of the support roller 13 ensures that the needle 20 does not interfere with the support roller 13 during the hole-making process. The correction sensor 31 detects the position of the film in real time. When the film deviates, it sends a signal to the controller 34. After receiving the signal, the controller 34 starts the second motor 28, which drives the threaded rod 27 to rotate. The rotation of the threaded rod 27 drives the slide table 25 to move. The first fixed frame 23 and the first traction roller 29 are moved further to correct the position of the film. After the perforation is completed, the quality of the perforated film is inspected, including indicators such as hole diameter, hole spacing and air permeability. The wear of the needle 20 and the bolt 18 is checked and replaced if necessary. The correction sensor 31 detects the position of the film in real time. When the film deviates, it sends a signal to the controller 34. The controller 34 starts the second motor 28, which drives the threaded rod 27 to rotate, thereby driving the slide table 25 and the first traction roller 29 to move and correct the position of the film.

[0021] Although specific embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these specific embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An antibacterial polyurethane film film roll wrapping hole device comprising a base plate (1), characterized in that: A first support frame (2) is fixedly connected to one side of the upper end of the base plate (1). A connecting column (4) is rotatably connected to the upper end of the first support frame (2) via a bearing. A mounting column (9) is fixedly connected to one end of the connecting column (4). A connecting block (10) is slidably connected to one end of the mounting column (9). A rotating roller (12) is slidably connected to one end of the connecting block (10). Two set screws (11) are threaded inside the connecting block (10). One end of each set screw (11) abuts against the surfaces of the mounting column (9) and the rotating roller (12), respectively. A second support frame (3) is fixedly connected to the side of the upper end of the base plate (1) away from the first support frame (2). The second support frame (3) is rotatably connected to the rotating roller (12). A support roller (13) is rotatably connected between the first support frame (2) and the second support frame (3) at the lower end of the rotating roller (12). The surface of the support roller (13) has multiple clearance grooves (14) arranged in a straight array and corresponding to the needle (20). The rotating roller (12) has multiple equally spaced mounting grooves (15) on its surface. The rotating roller (12) has threaded holes (16) on both sides inside the mounting grooves (15). The mounting plates (17) are slidably connected inside the multiple mounting grooves (15). The mounting plates (17) are slidably connected at both ends to bolts (18) corresponding to the threaded holes (16). One end of the bolt (18) passes through the mounting plate (17) and is threadedly connected to the threaded hole (16). The mounting plates (17) are threadedly connected inside the multiple mounting plates (17) to multiple threaded heads (19) arranged in a straight array. One end of the threaded head (19) is fixedly connected to a needle (20).

2. The antimicrobial polyurethane film film roll hole device according to claim 1, characterized in that: A mounting bracket (6) is fixedly connected to one side surface of the first support frame (2), and a first motor (7) is fixedly connected to the upper end of the mounting bracket (6). A drive wheel (8) is fixedly connected to the output end of the first motor (7).

3. The antimicrobial polyurethane film film roll hole device of claim 2, wherein: One end of the connecting column (4) is fixedly connected to a driven wheel (5), and the driven wheel (5) meshes with the driving wheel (8).

4. The antimicrobial polyurethane film film roll hole device of claim 1, wherein: Two slide rails (21) are fixedly connected to both sides of the upper end of the base plate (1). Slider (22) is slidably connected to the surface of the four slide rails (21). The upper ends of the two sliders (22) on the same side of the four sliders (22) are respectively fixedly connected to the first fixed frame (23). The two first fixed frames (23) are rotatably connected to the first traction roller (29).

5. The anti-microbial polyurethane film film roll hole device of claim 4, wherein: Two connecting frames (26) are fixedly connected to the upper end of the base plate (1) near the first fixed frame (23). A threaded rod (27) is rotatably connected between the two connecting frames (26). A second motor (28) is fixedly connected to the surface of one of the two connecting frames (26). The output end of the second motor (28) is fixedly connected to one end of the threaded rod (27).

6. The antimicrobial polyurethane film film roll hole device of claim 4, wherein: A fixing plate (24) is fixedly connected between the two first fixing brackets (23), and a slide (25) is fixedly connected in the middle of the fixing plate (24). The slide (25) is threadedly connected to the threaded rod (27).

7. The antibacterial polyurethane film winding hole device according to claim 1, characterized in that: Two second fixed frames (32) are fixedly connected to the upper end of the base plate (1) away from the first support frame (2) and the second support frame (3), and a second traction roller (33) is rotatably connected between the two second fixed frames (32).

8. The antibacterial polyurethane film winding hole device according to claim 6, characterized in that: A controller (34) is fixedly connected to the upper end of the base plate (1) near the first support frame (2). An L-shaped mounting piece (30) is fixedly connected to the upper end of one side of the first support frame (2). A correction sensor (31) is fixedly connected to one end of the L-shaped mounting piece (30). The correction sensor (31) and the second motor (28) are both electrically connected to the controller (34).

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