A visual detection device for environment-friendly plastic bag production

Abstract

The application discloses an environmental protection plastic bag production visual detection device, including processing table for detection, transport device arranged on the surface of the processing table, sliding frame in sliding connection with the transport device, fixing frame arranged at the bottom of the sliding frame and detection table arranged on the inner wall of the processing table, the environmental protection plastic bag production visual detection device further includes: optical surface calibration assembly for constraining the surface of the plastic bag in the focal depth range of the optical detection head, through the linkage flattening action of the compression roller and the push rod, the surface of the plastic bag is forced to be constrained in the best focal plane range of the super-depth-of-field industrial lens of the optical detection head, and the out-of-focus blur caused by material warping is completely eliminated, meanwhile, the incident angle and the reflection angle of the falling illumination tend to be consistent after the rolling and flattening, random diffuse scattered light caused by wrinkles is avoided to enter the sensor, and the global signal-to-noise ratio of the image is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of optical inspection technology, specifically to a visual inspection device for the production of environmentally friendly plastic bags. Background Technology

[0002] Visual inspection technology, as an important means of quality control in modern industrial automation, has been widely used in the production of plastic products. In the manufacturing process of environmentally friendly plastic bags, in order to ensure that the appearance quality and printing effect of the finished product meet the standard requirements, it is usually necessary to set up a machine vision-based inspection device on the production line. The device uses optical imaging to identify and judge black spots, crystal spots, foreign objects, printing defects and dimensional deviations on the surface of the plastic bag in real time.

[0003] While existing visual inspection devices for producing environmentally friendly plastic bags can identify black spots, crystal spots, and printing defects on the surface of plastic bags through optical inspection, ensuring that the appearance quality of the finished products meets basic requirements, their pre-inspection auxiliary processing functions are severely inadequate. In existing visual inspection devices, the mixed diffuse and specular reflection caused by the wrinkles on the plastic bag surface leads to abnormal grayscale gradients and local halo saturation in the images captured by the line scan camera. This directly undermines the defect recognition model based on edge detection in the visual algorithm. More importantly, the warping of the plastic bag... When the plastic bag leaves the depth of focus (DOF) range of the optical system, the imaging resolution drops sharply, making it impossible for the sensor to effectively distinguish micron-level crystal point defects. More seriously, after the inspection is completed, the existing device often uses air blowing or rigid push rods to remove the plastic bag from the inspection table. Due to the lack of effective control over the push rod reset timing, if the push rod rotates too early after the inspection is completed, it will directly push the inspected plastic bag laterally away from the normal conveying path, causing the plastic bag to get stuck, stacked, or shifted at the exit of the inspection table. This not only disrupts the continuous operation rhythm of the production line, but also increases the frequency and difficulty of manual intervention. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a visual inspection device for the production of environmentally friendly plastic bags, which solves the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: a visual inspection device for the production of environmentally friendly plastic bags, comprising a processing table for inspection, a transport device disposed on the surface of the processing table, a sliding frame slidably connected to the transport device, a fixed frame disposed at the bottom of the sliding frame, and an inspection table disposed on the inner wall of the processing table. The visual inspection device for the production of environmentally friendly plastic bags further comprises: an optical surface calibration component for constraining the surface of the plastic bag within the focal depth range of the optical inspection head, an optical image stabilization auxiliary component for maintaining the spatial orientation stability of the plastic bag during the inspection exposure period, and an optical anti-contamination component for cleaning and protecting the optical path of the optical inspection head when not in use. The calibration assembly includes a positioning frame fixedly connected to the fixed frame, a telescopic rod sliding on the inner wall of the positioning frame, a pressure roller rotatably connected to the telescopic rod, a push rod rotatably connected to the positioning frame, a sliding member sliding on the inner wall of the telescopic rod, a fixing block fixedly connected to the sliding member, a friction plate rotatably connected to the push rod shaft, and a connecting rod rotatably connecting the sliding member and the friction plate.

[0006] The calibration assembly further includes a slider slidably connected to the positioning frame, a stopper slidably connected to the positioning frame, a resistance plate slidably connected to the positioning frame, and a connecting rod 2 rotatably connecting the slider and the resistance plate. The slider has a groove on the side near the stopper.

[0007] An elastic element is provided between the sliding member and the telescopic rod. The elastic element is provided to drive the sliding member to reset. The side of the blocking member near the sliding member is set as an inclined surface. The inclined surface of the blocking member is provided to block the reset of the sliding member. An elastic element is provided between the blocking member and the positioning frame. The elastic element is provided to drive the blocking member to move in the direction of the sliding member. An elastic element is provided between the sliding member and the positioning frame. The elastic element is provided to drive the sliding member to reset.

[0008] The auxiliary components include a first rotating component rotatably connected to the push rod, a slide rod slidably connected to the detection platform, a second rotating component rotatably connected to the slide rod, a rotating roller rotatably connected to the sliding frame, a sliding rod slidably connected to the sliding frame, a key disposed on the inner wall of the sliding frame, and a first connecting rod rotatably connecting the sliding rod and the key. The first rotating component has a sliding groove on the side near the slide rod, the second rotating component has a protrusion on the side near the rotating roller, the rotating roller has a slot on the side near the key, the key is divided into a fixed end and a sliding end, and the first connecting rod is rotatably connected to the sliding end.

[0009] The auxiliary components also include a second connecting rod rotatably connected to the sliding frame, a sliding component sliding on the inner wall of the second connecting rod, a first fixing component fixedly connected to the second connecting rod, a second fixing component sliding on the inner wall of the rotating roller shaft, a sliding frame fixedly connected to the sliding rod, a baffle sliding on the inner wall of the detection table, and a third connecting rod rotatably connecting the sliding frame and the baffle.

[0010] A torsion spring is provided between the second rotating component and the slide rod to reset the second rotating component. The side of the second rotating component and the sliding component closest to each other is sloped to prevent obstruction during the movement of the slide rod. The side of the sliding rod closest to the slide rod is sloped. The side of the first fixing component and the second fixing component close to each other is sloped. An elastic element is provided between the movable end and the fixed end of the key to reset the key. An elastic element is provided between the second fixing component and the rotating roller to move the second fixing component towards the first fixing component. A torsion spring is provided between the rotating roller and the sliding frame to reset the rotating roller. An elastic element is provided between the baffle and the detection table to reset the baffle.

[0011] The anti-pollution component also includes a slider one that slides on the inner wall of the positioning frame, a slider two that slides on the inner wall of the positioning frame, and a rotating rod one that rotatably connects the slider one and the slider two.

[0012] The anti-pollution component also includes a push block slidably connected to the fixed frame, a rotating rod rotatably connected to the second slider and the push block, a rotating connecting rod rotatably connected to the fixed frame, and a protective shell slidably connected to the fixed frame. The rotating connecting rod is a double-headed telescopic rod, with one end rotatably connected to the push block and the other end rotatably connected to the protective shell.

[0013] An elastic element is provided between the slider and the positioning frame. The elastic element is provided to drive the slider to reset. An elastic element is provided between the protective shell and the fixing frame. The elastic element is provided to drive the protective shell to reset.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. In this invention, the surface of the plastic bag is forcibly constrained within the optimal focal plane range of the ultra-depth-of-field industrial lens of the optical inspection head through the linkage smoothing action of the pressure roller and the push rod. This completely eliminates the defocus blur caused by material warping. At the same time, the flat surface after rolling makes the incident angle and reflection angle of the incident illumination more consistent, avoiding random diffuse light caused by wrinkles from entering the sensor, effectively improving the global signal-to-noise ratio of the image, and completely eliminating the curling and wavy wrinkles caused by cutting and transportation. This ensures that the optical imaging surface of the optical inspection head is flat and consistent, avoiding light scattering and defect misjudgment caused by wrinkles. The locking mechanism of the friction plate on the pressure roller makes the pressure roller become a fixed pressure strip at the moment of inspection, firmly pressing the tail end of the plastic bag onto the surface of the inspection table, preventing the tail end from lifting due to airflow or static electricity, and ensuring full coverage of the inspection field without blind spots.

[0015] 2. In this invention, the baffle extends while the optical detection head is working, physically blocking stray light from the outside world to ensure that the detection area is in a stable dark environment. This avoids the optical sensor of the optical detection head from saturating or being falsely triggered due to strong light or changes in ambient light in the workshop, significantly improving the repeatability and consistency of the detection data. The key is inserted into the inside of the rotating roller during the detection process, keeping the rotating roller locked during the optical detection head's imaging. Fixing component one cannot drive the rotating roller to rotate through fixing component two. This design ensures that the plastic bag is absolutely still at the moment of detection, preventing image blurring or detection area shift due to accidental rotation of the rotating roller. After the detection is completed, the rotating roller actively pushes the plastic bag away from the detection table, ensuring that the detected plastic bag can smoothly enter the next process or collection area, avoiding retention, overlap, or jamming caused by electrostatic adsorption or soft materials, and ensuring continuous operation of the production line.

[0016] 3. In this invention, the protective shell forms a closed protection for the optical inspection head when not in use, effectively preventing dust, fibrous material, oil mist and other pollutants in the workshop environment from adhering to the lens surface, ensuring consistent optical imaging clarity during each inspection, and avoiding image blurring or reduced light throughput due to lens dirt. When not in use, the protective shell covers the outside of the optical inspection head, preventing accidental contact by operators, tool collisions or foreign object splashes from causing scratches or impact damage to the precision lens, especially protecting the filter and coating layer at the front of the lens. The opening action of the protective shell is mechanically linked to the detection pressing action of the telescopic rod, and the protective shell is completely removed before the optical inspection head reaches the working position, ensuring that the lens is fully exposed and the light path is unobstructed at the moment of inspection, without any obstruction or reflection interference. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram showing the position and structure of the sliding frame and the fixed frame of the present invention; Figure 3This is a schematic diagram of the position structure of the telescopic rod and pressure roller of the present invention; Figure 4 This is a schematic diagram showing the position and structure of the sliding member and the fixing block of the present invention; Figure 5 This is a schematic diagram of the position structure of the rotating component and the slide bar of the present invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram of section A; Figure 7 This is a schematic diagram of the position structure of the connecting rod and the baffle of the present invention; Figure 8 This is a schematic diagram of the positional structure of slider two and rotating rod two according to the present invention.

[0018] The meanings of the labels in the diagram are as follows: 1. Processing table; 2. Transport device; 3. Sliding frame; 4. Fixed frame; 5. Optical inspection head; 6. Inspection table; 7. Positioning frame; 8. Telescopic rod; 9. Pressure roller; 10. Push rod; 11. Sliding component; 12. Fixed block; 13. Connecting rod one; 14. Friction plate; 15. Sliding component; 16. Resistance component; 17. Connecting rod two; 18. Resistance plate; 21. Rotating component one; 22. Sliding rod; 23. Rotating component 24. Rotating roller; 25. Sliding rod; 26. Connecting rod one; 27. Key; 28. Connecting rod two; 29. ​​Sliding component; 291. Fixing component one; 292. Fixing component two; 293. Sliding frame; 294. Connecting rod three; 295. Baffle; 31. Sliding block one; 32. Rotating rod one; 33. Sliding block two; 34. Rotating rod two; 35. Push block; 36. Rotating connecting rod; 37. Protective shell. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figures 1-4One embodiment of the present invention is: a visual inspection device for the production of environmentally friendly plastic bags, including a processing table 1 for inspection, a transport device 2 disposed on the surface of the processing table 1, a sliding frame 3 slidably connected to the transport device 2, a fixing frame 4 disposed at the bottom of the sliding frame 3, and an inspection table 6 disposed on the inner wall of the processing table 1. The visual inspection device for the production of environmentally friendly plastic bags also includes: an optical surface calibration component for constraining the surface of the plastic bag within the focal depth range of the optical inspection head 5, an optical image stabilization auxiliary component for maintaining the spatial orientation stability of the plastic bag during the inspection exposure period, and an optical anti-contamination component for cleaning and protecting the optical path of the optical inspection head 5 when not in use. The calibration assembly includes a positioning frame 7 fixedly connected to the fixed frame 4, a telescopic rod 8 sliding on the inner wall of the positioning frame 7, a pressure roller 9 rotatably connected to the telescopic rod 8, a push rod 10 rotatably connected to the positioning frame 7, a sliding member 11 sliding on the inner wall of the telescopic rod 8, a fixing block 12 fixedly connected to the sliding member 11, a friction plate 14 slidably connected to the rotating shaft of the push rod 10, and a connecting rod 13 rotatably connecting the sliding member 11 and the friction plate 14.

[0021] The calibration assembly also includes a slide 15 slidably connected to the positioning frame 7, a stop 16 slidably connected to the positioning frame 7, a resistance plate 18 slidably connected to the positioning frame 7, and a connecting rod 17 rotatably connecting the slide 15 and the resistance plate 18. A groove is provided on the side of the slide 15 near the stop 16.

[0022] An elastic element is provided between the sliding member 11 and the telescopic rod 8. The elastic element is provided to drive the sliding member 11 to reset. The side of the blocking member 16 near the sliding member 15 is set with an inclined surface. The inclined surface of the blocking member 16 is provided to block the reset of the sliding member 15. An elastic element is provided between the blocking member 16 and the positioning frame 7. The elastic element is provided to drive the blocking member 16 to move towards the sliding member 15. An elastic element is provided between the sliding member 15 and the positioning frame 7. The elastic element is provided to drive the sliding member 15 to reset.

[0023] In this embodiment, when plastic bags need to be inspected, they are first cut and cleaned on the surface of processing table 1. After pre-processing, the plastic bags are intermittently transferred to the surface of transport device 2 for transport. When the plastic bags are transported to the surface of inspection table 6, the fixing frame 4 drives the optical inspection head 5 to move along the surface of the sliding frame 3 towards the plastic bags. At this time, the optical inspection head 5 will use optical inspection to inspect the plastic bags. During inspection, the fixing frame 4 will drive the positioning frame 7 to move downward. The downward movement of the positioning frame 7 will drive the telescopic rod 8 to move. The movement of the telescopic rod 8 will push the pressure roller 9 to contact the surface of the plastic bags. When the pressure roller 9 contacts the plastic bags, the push rod 10 will contact the surface of the plastic bags. At this time, when the positioning frame 7 continues to move downward, the telescopic rod 8 will move towards the positioning frame 6. When the frame 7 moves inward, the push rod 10 will be squeezed between the positioning frame 7 and the detection table 6. The positioning frame 7 will then push the push rod 10 to rotate. The movement of the push rod 10 will cooperate with the pressure roller 9 to make the plastic bag spread flat on the surface of the detection table 6. When the telescopic rod 8 moves inward toward the positioning frame 7, the fixing block 12 will contact the positioning frame 7. The positioning frame 7 will then push the sliding member 11 toward the pressure roller 9 through the fixing block 12. The movement of the sliding member 11 will push the friction plate 14 to contact the pressure roller 9 through the connecting rod 13. When the friction plate 14 contacts the pressure roller 9, it will fix the pressure roller 9, so that the pressure roller 9 can press the tail end of the plastic bag. When the telescopic rod 8 moves inward toward the positioning frame 7, the fixing block 12 will contact the sliding member 15. The fixing block 12 will then push the sliding member 15. When the slider 15 moves, the resist 16 slides into the inner wall of the groove. When the slider 15 resets, the inclined surface of the resist 16 delays the reset of the slider 15. When the slider 15 moves upward, it pushes the connecting rod 17 to move. The movement of the connecting rod 17 pushes the resistance plate 18 to contact the push rod 10, so that when the positioning frame 7 drives the push rod 10 to move upward, the reset rotation of the push rod 10 will be delayed to avoid the plastic bag being pushed off course after detection. During detection, the backlight source plate under the detection table 6 is lit synchronously. At this time, the positioning accuracy of the pressure roller 9 and the push rod 10 ensures that the plastic bag completely covers the field of view of the optical detection head 5. After the control unit receives the locking signal of the friction plate 14, it triggers the electronic shutter of the optical detection head 5 to precisely couple the exposure time with the mechanical locking time. The sequential action of roller 9 and push rod 10 creates a composite smoothing effect on the surface of the inspection table 6, first by rolling and then by scraping, completely eliminating curls and wavy wrinkles caused by cutting and transportation. This ensures consistent flatness of the optical imaging surface of the optical inspection head 5, avoiding light scattering and defect misjudgment caused by wrinkles. The locking mechanism of friction plate 14 on pressure roller 9 makes it a fixed pressure strip at the moment of inspection, firmly pressing the tail end of the plastic bag onto the surface of the inspection table 6, preventing the tail end from lifting due to airflow or static electricity, and ensuring full coverage of the inspection field without blind spots. The design of inclined delay slider 15 reset of resist 16 ensures that push rod 10 will not immediately rotate when it rises to reset, delaying the time for push rod 10 to detach from the surface of the plastic bag. This effectively prevents the plastic bag from detaching after inspection.Push rod 10 prematurely resets, causing the detected plastic bag to be laterally pushed off the conveyor path, resulting in bag jamming or stacking.

[0024] Please see Figures 4-8 Based on the above embodiments, in another embodiment of the present invention, the auxiliary components include a rotating component 21 rotatably connected to the push rod 10, a slide rod 22 slidably connected to the detection table 6, a rotating component 23 rotatably connected to the slide rod 22, a rotating roller 24 rotatably connected to the sliding frame 3, a sliding rod 25 slidably connected to the sliding frame 3, a key 27 disposed on the inner wall of the sliding frame 3, and a connecting rod 26 rotatably connecting the sliding rod 25 and the key 27. The rotating component 21 has a sliding groove on the side near the slide rod 22, the rotating component 23 has a protrusion on the side near the rotating roller 24, the rotating roller 24 has a slot on the side near the key 27, the key 27 is divided into a fixed end and a sliding end, and the connecting rod 26 is rotatably connected to the sliding end.

[0025] The auxiliary components also include a second connecting rod 28 rotatably connected to the sliding frame 3, a sliding member 29 sliding on the inner wall of the second connecting rod 28, a first fixing member 291 fixedly connected to the second connecting rod 28, a second fixing member 292 sliding on the inner wall of the rotating shaft of the roller 24, a sliding frame 293 fixedly connected to the sliding rod 22, a baffle 295 sliding on the inner wall of the detection table 6, and a third connecting rod 294 rotatably connecting the sliding frame 293 and the baffle 295.

[0026] A torsion spring is provided between the rotating component 23 and the sliding rod 22 to drive the rotating component 23 to reset. The side of the rotating component 23 and the sliding component 29 that are close to each other is set as an inclined surface to avoid obstruction when the sliding rod 22 moves. The side of the sliding rod 25 that is close to the sliding rod 22 is set as an inclined surface. The side of the fixing component 1 291 and the fixing component 292 that are close to each other is set as an inclined surface. An elastic element is provided between the movable end and the fixed end of the key 27 to drive the key 27 to reset. An elastic element is provided between the fixing component 292 and the rotating roller 24 to drive the fixing component 292 to move in the direction of the fixing component 1 291. A torsion spring is provided between the rotating roller 24 and the sliding frame 3 to drive the rotating roller 24 to reset. An elastic element is provided between the baffle 295 and the detection table 6 to drive the baffle 295 to reset.

[0027] The anti-pollution component also includes a slider 31 that slides on the inner wall of the positioning frame 7, a slider 33 that slides on the inner wall of the positioning frame 7, and a rotating rod 32 that rotatably connects slider 31 and slider 33.

[0028] The anti-pollution component also includes a push block 35 slidably connected to the fixed frame 4, a rotating rod 34 rotatably connecting the slider 33 and the push block 35, a rotating connecting rod 36 rotatably connected to the fixed frame 4, and a protective shell 37 slidably connected to the fixed frame 4. The rotating connecting rod 36 is a double-headed telescopic rod, with one end of the rotating connecting rod 36 rotatably connected to the push block 35 and the other end of the rotating connecting rod 36 rotatably connected to the protective shell 37.

[0029] An elastic element is provided between slider 31 and positioning frame 7. The elastic element is provided to drive slider 31 to reset. An elastic element is provided between protective shell 37 and fixed frame 4. The elastic element is provided to drive protective shell 37 to reset.

[0030] In this embodiment, when the telescopic rod 8 moves downward, it drives the rotating component 21 to move. As the rotating component 21 moves, the sliding rod 22 inserts into it. When the telescopic rod 8 moves the plastic bag, it pushes the sliding rod 22 through the rotating component 21. The sliding rod 22 then drives the rotating component 23 to move. When the rotating component 23 moves, it contacts the sliding component 29, causing it to rotate away from the roller 24. When the sliding rod 22 resets the rotating component 23, it contacts the sliding component 29 again, preventing it from rotating due to the limiting block. The rotating component 23 then pushes the connecting rod 28 to rotate through the sliding component 29. The rotation of the connecting rod 28 then drives the fixing component... When the first fixing part 291 moves, it will come into contact with the second fixing part 292. The inclined surface of the first fixing part 291 will then contact the inclined surface of the second fixing part 292, causing the first fixing part 291 to push the second fixing part 292 towards the inside of the rotating roller 24. When the slide rod 22 moves, it will come into contact with the inclined surface of the sliding rod 25, causing the slide rod 22 to push the sliding rod 25 upwards. The upward movement of the sliding rod 25 will push the key 27 into the rotating roller 24 via the connecting rod 26, preventing the rotating roller 24 from rotating. Therefore, the first fixing part 291 cannot drive the rotating roller 24 to rotate via the second fixing part 292. The rotation of the connecting rod 28 will stimulate the torsion spring to store force. After the slide rod 22 drives the rotating part 23 to reset, the stored torsion spring will drive the connecting rod 28... When the connecting rod 28 rotates, the rotation of the connecting rod 28 will cause the fixing part 291 to move. The movement of the fixing part 291 will drive the rotating roller 24 to rotate through the fixing part 292. The rotation of the rotating roller 24 will push the plastic bag away from the detection table 6. When the sliding rod 22 moves, it will drive the sliding frame 293 to move. The movement of the sliding frame 293 will drive the baffle 295 to extend away from the detection table 6 through the connecting rod 394. When the baffle 295 extends, it will block the external light when the optical detection head 5 is detecting, so as to avoid the optical light being too strong and affecting the detection. The baffle 295 extends while the optical detection head 5 is working, physically blocking the external stray light, ensuring that the detection area is in a stable dark field environment, and avoiding the influence of strong light in the workshop or changes in ambient light. To prevent the optical sensor of the optical inspection head 5 from saturating or malfunctioning, significantly improving the repeatability and consistency of the inspection data, the key 27 is inserted into the inside of the rotating roller 24 during the inspection process, so that the rotating roller 24 is locked in a locked state during the photo taking by the optical inspection head 5. The fixing part 1 291 cannot drive the rotating roller 24 to rotate through the fixing part 292. This design ensures that the plastic bag is absolutely stationary at the moment of inspection, preventing image ghosting or inspection area displacement caused by the accidental rotation of the rotating roller 24. After the inspection is completed, the rotation of the rotating roller 24 actively pushes the plastic bag away from the inspection table 6, ensuring that the inspected plastic bag can smoothly enter the next process or collection area, avoiding retention, overlap or jamming caused by electrostatic adsorption or soft materials, and ensuring continuous operation of the production line.

[0031] When the telescopic rod 8 moves inward toward the positioning frame 7, it pushes slider 1 31 to move. The movement of slider 1 31 pushes slider 2 33 to move via rotating rod 1 32. The movement of slider 2 33 pushes push block 35 to move via rotating rod 2 34. The movement of push block 35 pushes rotating connecting rod 36 to rotate. When rotating, the other end of rotating connecting rod 36 pushes protective shell 37 to move away from optical detection head 5. After protective shell 37 moves into position, the protection of optical detection head 5 by protective shell 37 is released, allowing optical detection head 5 to perform normal detection. When not in use, protective shell 37 provides dust protection for optical detection head 5. During use, the optical inspection head 5 is sealed and protected, effectively preventing dust, fibrous material, oil mist and other pollutants in the workshop environment from adhering to the lens surface. This ensures consistent optical imaging clarity during each inspection, avoids image blurring or reduced light throughput due to lens dirt, and prevents scratches or impact damage to the precision lens caused by operator accidental contact, tool collision or foreign object splash. In particular, it protects the filter and coating layer at the front of the lens. The opening action of the protective shell 37 is mechanically linked to the detection pressing action of the telescopic rod 8. Before the optical inspection head 5 reaches the working position, the protective shell 37 has been completely removed, ensuring that the lens is fully exposed and the light path is unobstructed at the moment of inspection, without any obstruction or reflection interference.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0033] Although 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 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. A visual inspection device for producing environmentally friendly plastic bags, comprising a processing table (1) for inspection, a transport device (2) disposed on the surface of the processing table (1), a sliding frame (3) slidably connected to the transport device (2), a fixing frame (4) disposed at the bottom of the sliding frame (3), and an inspection table (6) disposed on the inner wall of the processing table (1), characterized in that, The visual inspection device for producing environmentally friendly plastic bags also includes: an optical surface calibration component for constraining the surface of the plastic bag within the focal depth range of the optical inspection head (5), an optical image stabilization auxiliary component for maintaining the spatial orientation stability of the plastic bag during the inspection exposure period, and an optical anti-pollution component for cleaning and protecting the optical path of the optical inspection head (5) when not in use. The calibration assembly includes a positioning frame (7) fixedly connected to the fixed frame (4), a telescopic rod (8) sliding on the inner wall of the positioning frame (7), a pressure roller (9) rotatably connected to the telescopic rod (8), a push rod (10) rotatably connected to the positioning frame (7), a sliding member (11) sliding on the inner wall of the telescopic rod (8), a fixing block (12) fixedly connected to the sliding member (11), a friction plate (14) rotatably connected to the rotating shaft of the push rod (10), and a connecting rod (13) rotatably connecting the sliding member (11) and the friction plate (14).

2. The visual inspection device for producing environmentally friendly plastic bags according to claim 1, characterized in that: The calibration assembly also includes a slide (15) slidably connected to the positioning frame (7), a stop (16) slidably connected to the positioning frame (7), a resistance plate (18) slidably connected to the positioning frame (7), and a connecting rod (17) rotatably connecting the slide (15) and the resistance plate (18). The slide (15) has a groove on the side near the stop (16).

3. The visual inspection device for producing environmentally friendly plastic bags according to claim 2, characterized in that: An elastic element is provided between the sliding member (11) and the telescopic rod (8). The side of the blocking member (16) near the sliding member (15) is set as an inclined surface. An elastic element is provided between the blocking member (16) and the positioning frame (7). An elastic element is provided between the sliding member (15) and the positioning frame (7).

4. The visual inspection device for producing environmentally friendly plastic bags according to claim 1, characterized in that: The auxiliary components include a rotating component 1 (21) rotatably connected to the push rod (10), a slide rod (22) slidably connected to the detection table (6), a rotating component 2 (23) rotatably connected to the slide rod (22), a rotating roller (24) rotatably connected to the sliding frame (3), a sliding rod (25) slidably connected to the sliding frame (3), a key (27) disposed on the inner wall of the sliding frame (3), and a connecting rod 1 (26) rotatably connecting the sliding rod (25) and the key (27). The rotating component 1 (21) has a sliding groove on the side near the slide rod (22), the rotating component 2 (23) has a protrusion on the side near the rotating roller (24), the rotating roller (24) has a slot on the side near the key (27), the key (27) is divided into a fixed end and a sliding end, and the connecting rod 1 (26) is rotatably connected to the sliding end.

5. The visual inspection device for producing environmentally friendly plastic bags according to claim 4, characterized in that: The auxiliary components also include a second connecting rod (28) rotatably connected to the sliding frame (3), a sliding member (29) sliding on the inner wall of the second connecting rod (28), a first fixing member (291) fixedly connected to the second connecting rod (28), a second fixing member (292) sliding on the inner wall of the rotating shaft of the roller (24), a sliding frame (293) fixedly connected to the sliding rod (22), a baffle (295) sliding on the inner wall of the detection table (6), and a third connecting rod (294) rotatably connecting the sliding frame (293) and the baffle (295).

6. The visual inspection device for producing environmentally friendly plastic bags according to claim 5, characterized in that: A torsion spring is provided between the rotating part 2 (23) and the slide rod (22). The side of the rotating part 2 (23) and the sliding part (29) that are close to each other is set as an inclined surface. The side of the sliding rod (25) that is close to the slide rod (22) is set as an inclined surface. The side of the fixing part 1 (291) and the fixing part 2 (292) that are close to each other is set as an inclined surface. An elastic element is provided between the movable end and the fixed end of the key (27). An elastic element is provided between the fixing part 2 (292) and the rotating roller (24). A torsion spring is provided between the rotating roller (24) and the sliding frame (3). An elastic element is provided between the baffle (295) and the detection table (6).

7. The visual inspection device for producing environmentally friendly plastic bags according to claim 1, characterized in that: The anti-pollution component also includes a slider one (31) that slides on the inner wall of the positioning frame (7), a slider two (33) that slides on the inner wall of the positioning frame (7), and a rotating rod one (32) that rotatably connects the slider one (31) and the slider two (33).

8. The visual inspection device for producing environmentally friendly plastic bags according to claim 7, characterized in that: The anti-pollution component also includes a push block (35) slidably connected to the fixed frame (4), a rotating rod (34) rotatably connecting the slider (33) and the push block (35), a rotating connecting rod (36) rotatably connected to the fixed frame (4), and a protective shell (37) slidably connected to the fixed frame (4). The rotating connecting rod (36) is a double-headed telescopic rod. One end of the rotating connecting rod (36) is rotatably connected to the push block (35), and the other end of the rotating connecting rod (36) is rotatably connected to the protective shell (37).

9. The visual inspection device for producing environmentally friendly plastic bags according to claim 8, characterized in that: An elastic element is provided between the slider (31) and the positioning frame (7), and an elastic element is provided between the protective shell (37) and the fixing frame (4).

Images