Packaging bag defect detection device based on visual imaging

Abstract

The present invention relates to the field of printing detection technology, and discloses a packaging bag defect detection device based on visual imaging, comprising an inspection platform, wherein a conveyor belt for conveying packaging bags is provided on the inner side of the inspection platform; a loading and unloading assembly is provided on the top of the inspection platform and located at both ends of the conveyor belt, for loading and unloading packaging bags before and after detection; a visual sensor is fixedly provided on the top of the inspection platform, and two are provided, respectively used for printing defect detection on both sides of the packaging bag; a flip assembly is provided on the top of the inspection platform and located between the two visual sensors; wherein the flip assembly includes a fixed plate fixedly provided on the top of the inspection platform, and a second suction cup is provided at the bottom of the fixed plate, for adsorbing on the top of the packaging bag near the sealing end. The packaging bag defect detection device based on visual imaging can effectively solve the problem in the prior art that it is inconvenient to perform printing defect detection on the upper and lower sides of the packaging bag.

Description

Technical Field

[0001] The present invention relates to the field of printing detection technology, and in particular to a packaging bag defect detection device based on visual imaging. Background Art

[0002] Packaging bags are bags used to wrap, protect, transport and store various items, and are usually made of materials such as plastic, paper, and cloth. During the packaging bag production process, after the bag roll is printed, the printed bag roll film needs to be cut and glued into complete plastic packaging according to the size and bag shape of the plastic packaging bag. In order to prevent defects such as missing or misprinted parts from affecting the appearance of the packaging bag during the printing process, the packaging bags need to be inspected for printing and packaging bags with printing defects are promptly selected.

[0003] Traditional packaging bag printing defect detection typically uses machine vision technology to perform defect detection on packaging bags, including extracting characteristic values such as length, width, area, and fill rate, and detecting overall shape and internal printing defects in real time with high precision and stability. However, during the continuous conveying of packaging bags, since the packaging bags are in a flat state and move, it is inconvenient to inspect printing defects on both the upper and lower sides of the packaging bags. If only the other side is inspected, the inspection efficiency of the packaging bags will be affected. Summary of the Invention

[0004] In response to the above-mentioned shortcomings of the prior art, the present invention provides a packaging bag defect detection device based on visual imaging, which can effectively solve the problem in the prior art that it is inconvenient to detect printing defects on the upper and lower sides of the packaging bag.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0006] The present invention provides a packaging bag defect detection device based on visual imaging, comprising:

[0007] An inspection platform, wherein a conveyor belt for conveying packaging bags is provided inside the inspection platform;

[0008] Loading and unloading components are set on the top of the inspection table and located at both ends of the conveyor belt, used for loading and unloading packaging bags before and after inspection;

[0009] Two visual sensors are fixed on the top of the inspection table, one for inspecting printing defects on both sides of the packaging bag;

[0010] The flip assembly is arranged on the top of the inspection table and is located between the two vision sensors;

[0011] Among them, the flipping assembly includes a fixed plate fixedly set on the top of the detection platform, and a second suction cup is set at the bottom of the fixed plate for adsorbing on the top of the packaging bag near the sealing end, and there are two second suction cups, which are driven to rise and fall by external force.

[0012] Furthermore, the loading and unloading assembly includes:

[0013] The frame is fixed horizontally on the top of the testing table;

[0014] The movable plate is driven by an external force to slide on the inner side of the frame;

[0015] The first suction cup is driven by external force to be lifted and lowered at the bottom of the movable plate, and two of them are provided for adsorbing the packaging bags for loading and unloading.

[0016] Furthermore, it also includes:

[0017] Auxiliary rollers, which are installed on the outside of the conveyor belt and are used to limit the position of the packaging bag when turning it over;

[0018] Connectors are symmetrically arranged at both ends of the auxiliary roller, and the connectors are fixedly arranged on the outside of the conveyor belt to support the auxiliary roller to be located on the outside of the conveyor belt;

[0019] Wherein, the auxiliary roller automatically falls on the top of the packaging bag after the packaging bag is laid flat and loaded.

[0020] Furthermore, a connecting shaft is fixedly provided on the inner side of the auxiliary roller, and rollers are fixedly provided on both ends of the connecting shaft;

[0021] An inclined sliding hole is provided on the inner side of the connecting piece, and a connecting shaft is slidably provided on the inner side of the inclined sliding hole for guiding the auxiliary roller to move obliquely downward and land on the top edge of the packaging bag;

[0022] Among them, when the auxiliary roller moves toward the bottom of the conveyor belt, it automatically resets to the top of the inclined slide hole by its own gravity. A limiting rail is fixedly provided on the outside of the detection platform corresponding to the feeding end of the conveyor belt to support the reset roller.

[0023] Furthermore, the flip assembly further comprises:

[0024] a second connecting frame, used to connect the two second suction cups, wherein the second connecting frame is driven to move up and down by an external force;

[0025] Limiting plates are fixedly arranged on both sides of the second connecting frame, and a first inclined surface is provided on one side of the limiting plate close to the connecting shaft, for pushing the auxiliary roller to move from the edge of the packaging bag to the middle;

[0026] Wherein, a horizontal sliding hole is further opened on the inner side of the connecting member, and the horizontal sliding hole is connected to the bottom of the inclined sliding hole, and is used to limit the lateral movement of the auxiliary roller.

[0027] Furthermore, a second inclined surface is provided on the bottom side of the horizontal sliding hole, which is used to guide the auxiliary roller to automatically return to the bottom of the inclined sliding hole after the packaging bag is turned over.

[0028] Furthermore, the flip assembly also includes a blow pipe, which is fixedly arranged on the inner side of the fixed plate, and the air outlet end of the blow pipe is located on the side of the second suction cup away from the first inclined surface, for blowing air downward when the second suction cup releases the packaging bag.

[0029] Furthermore, flexible contact layers are provided on the outer sides of the conveyor belt and the auxiliary roller.

[0030] Furthermore, the loading and unloading assembly near the unloading end of the conveyor belt also includes a partition, which is fixedly arranged on the outside of the detection platform, and a waste opening for unloading is opened at the bottom of the detection platform.

[0031] Compared with the prior art, the technical solution provided by the present invention has the following beneficial effects:

[0032] The present invention is provided with a turning assembly to turn over the packaging bag, so that printing defects can be detected on both sides of the packaging bag before and after turning over, thereby ensuring the comprehensiveness of printing defect detection. Moreover, under the intermittent conveying effect of the conveyor belt, the detection time of the visual sensor on the packaging bag is increased, preventing the continuous movement of the packaging bag from interfering with the detection, and making the detection result of the visual sensor more accurate.

[0033] The present invention arranges loading and unloading components at both ends of the conveyor belt to load and unload the packaging bags, so that the packaging bags can be sorted during automatic loading and unloading to ensure the detection efficiency of the packaging bags. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. Those skilled in the art can also derive other drawings based on these drawings without inventive effort.

[0035] Figure 1 It is a three-dimensional structural diagram of an embodiment of the present invention;

[0036] Figure 2 This is a schematic structural diagram of the bottom portion of an embodiment of the present invention;

[0037] Figure 3This is a schematic structural diagram of a conveyor belt and auxiliary rollers according to an embodiment of the present invention;

[0038] Figure 4 This is a structural diagram of a loading and unloading assembly according to an embodiment of the present invention;

[0039] Figure 5 This is a schematic structural diagram of a flip assembly according to an embodiment of the present invention;

[0040] Figure 6 This is a schematic structural diagram of the cooperation between the flip assembly and the auxiliary roller according to an embodiment of the present invention;

[0041] Figure 7 Schematic diagram of the structure of the connecting piece according to an embodiment of the present invention.

[0042] The numbers in the figure represent: 100, packaging bag;

[0043] 1. Inspection table; 11. Conveyor belt; 12. Side plate; 13. Limit rail; 14. Drive roller; 15. Motor; 16. Waste outlet;

[0044] 2. Loading and unloading assembly; 21. Frame; 22. Column; 23. Slide rail; 24. Pneumatic slider; 25. Moving plate; 26. First driving member; 27. First connecting frame; 28. First elastic telescopic column; 29. First suction cup; 210. Partition;

[0045] 3. Visual sensor;

[0046] 4. Flip assembly; 41. Fixing plate; 42. Second driving member; 43. Second connecting frame; 44. Second elastic telescopic column; 45. Second suction cup; 46. Crossbar; 47. Limiting plate; 471. First inclined surface; 48. Blowing pipe;

[0047] 5. Auxiliary roller; 51. Connecting shaft; 52. Roller;

[0048] 6. Connecting piece; 61. Inclined sliding hole; 62. Horizontal sliding hole; 63. Second inclined surface. DETAILED DESCRIPTION

[0049] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0050] The present invention will be further described below with reference to the embodiments.

[0051] See also Figure 1-Figure 7 The present invention provides a technical solution: a packaging bag 100 defect detection device based on visual imaging, including a detection platform 1, a loading and unloading component 2, a visual sensor 3 and a flip component 4. A conveyor belt 11 for conveying the packaging bag 100 is provided on the inner side of the detection platform 1; the loading and unloading component 2 is arranged on the top of the detection platform 1 and is located at both ends of the conveyor belt 11, and is used to load and unload the packaging bag 100 before and after detection; the visual sensor 3 is fixedly set on the top of the detection platform 1 through a side plate 12, and two visual sensors are provided, respectively used to perform printing defect detection on both sides of the packaging bag 100; the flip component 4 is arranged on the top of the detection platform 1 and is located between the two visual sensors 3.

[0052] Among them, the flip assembly 4 includes a fixed plate 41 fixedly set on the top of the detection platform 1, and the fixed plate 41 is fixedly set on the top of the detection platform 1 through the side plate 12. A second suction cup 45 is provided at the bottom of the fixed plate 41 for adsorbing on the top of the packaging bag 100 near the sealing end, and there are two second suction cups 45, and the two second suction cups 45 are driven to move up and down by external force; specifically, a second driving member 42 is fixedly set on the inner side of the fixed plate 41, and a second suction cup 45 is provided at the driving end of the second driving member 42. Two driving rollers 14 for driving the conveyor belt 11 are rotatably provided on the inner side of the detection platform 1, and one of the driving rollers 14 is driven by a motor 15 to rotate intermittently, and the motor 15 is fixedly set on the outer side of the detection platform 1.

[0053] The loading and unloading assembly 2 includes a frame 21, a movable plate 25 and a first suction cup 29. The frame 21 is horizontally fixed on the top of the inspection platform 1 through the outer column 22; the movable plate 25 is driven by external force to slide on the inner side of the frame 21; the first suction cup 29 is driven by external force to be raised and lowered and is set at the bottom of the movable plate 25, and there are two first suction cups 29 for adsorbing the packaging bag 100 for loading and unloading; the loading and unloading assembly 2 near the unloading end of the conveyor belt 11 also includes a partition 210, which is fixed on the outer side of the inspection platform 1, and a waste port 16 for unloading is opened at the bottom of the inspection platform 1.

[0054] Specifically, slide rails 23 are symmetrically fixed on the inner side of the frame 21, and pneumatic sliders 24 are slidably provided on the outer side of the slide rails 23. The pneumatic sliders 24 are fixed at the bottom of the movable plate 25 to drive the movable plate 25 to move horizontally; and a first driving member 26 is fixed on the inner side of the movable plate 25, and a first connecting frame 27 is fixed at the driving end of the first driving member 26, and both ends of the bottom of the first connecting frame 27 are connected to the first suction cup 29 through a first elastic telescopic column 28; the pneumatic driving principle of the pneumatic slider 24 and the adsorption principle of the first suction cup 29 are both existing technologies and will not be repeated here.

[0055] The first driving member 26 / the second driving member 42 in the above scheme is a power member with a linear output function. In actual work, the staff can choose linear guides, pneumatic push rods, electric push rods or hydraulic push rods according to actual needs to achieve components that can drive the movable plate 25 to move horizontally / the second suction cup 45 to move up and down.

[0056] In some technical solutions, it also includes an auxiliary roller 5 and a connecting member 6. The auxiliary roller 5 is installed on the outside of the conveyor belt 11 and is used to limit the packaging bag 100 when turning it over; the connecting member 6 is symmetrically arranged at both ends of the auxiliary roller 5, and the connecting member 6 is fixedly arranged on the outside of the conveyor belt 11 to support the auxiliary roller 5 on the outside of the conveyor belt 11; wherein, the auxiliary roller 5 automatically falls on the top of the packaging bag 100 after the packaging bag 100 is flatly laid and loaded.

[0057] A connecting shaft 51 is fixedly provided on the inner side of the auxiliary roller 5, and rollers 52 are fixedly provided at both ends of the connecting shaft 51; an inclined sliding hole 61 is opened on the inner side of the connecting piece 6, and a connecting shaft 51 is slidably provided on the inner side of the inclined sliding hole 61, which is used to guide the auxiliary roller 5 to move obliquely downward and fall on the top edge of the packaging bag 100; wherein, when the auxiliary roller 5 moves toward the bottom of the conveyor belt 11, it automatically resets to the top of the inclined sliding hole 61 by its own gravity, and a limiting rail 13 is fixedly provided on the outer side of the detection platform 1 corresponding to the feeding end of the conveyor belt 11, which is used to support the reset roller 52.

[0058] The flip assembly 4 also includes a second connecting frame 43 and a limit plate 47 for connecting the two second suction cups 45. The second connecting frame 43 is driven by the second driving member 42 to move up and down. The second driving member 42 is fixedly arranged on the inner side of the fixed plate 41. The second connecting frame 43 is connected to the second suction cup 45 through a second elastic telescopic column 44; the limit plate 47 is fixedly arranged on both sides of the second suction cup 45 through a cross bar 46. The side of the limit plate 47 close to the connecting shaft 51 is provided with a first inclined surface 471, and the first inclined surface 471 is used to push the auxiliary roller 5 to move from the edge of the packaging bag 100 to the middle direction; wherein, a horizontal sliding hole 62 is also opened on the inner side of the connecting member 6, and the horizontal sliding hole 62 is connected to the bottom of the inclined sliding hole 61, which is used to limit the lateral movement of the auxiliary roller 5.

[0059] A second inclined surface 63 is provided on the bottom side of the horizontal sliding hole 62 for guiding the auxiliary roller 5 to automatically return to the bottom of the inclined sliding hole 61 after the packaging bag 100 is turned over.

[0060] The flip assembly 4 also includes a blow pipe 48, which is fixedly arranged on the inner side of the fixed plate 41. The air outlet end of the blow pipe 48 is located on the side of the second suction cup 45 away from the first inclined surface 471, and is used to blow air downward when the second suction cup 45 releases the packaging bag 100.

[0061] The outer sides of the conveyor belt 11 and the auxiliary roller 5 are both provided with a flexible contact layer, preferably a contact layer made of sponge material, to prevent the packaging bag 100 from sliding on the outer sides of the conveyor belt 11 and the auxiliary roller 5 and being damaged when turning over, and to prevent the auxiliary roller 5 from exerting a large pressure on the packaging bag 100 and pulling and deforming it.

[0062] Principle and advantages of packaging bag 100 defect detection device based on visual imaging:

[0063] First, the packaging bag 100 to be tested is stacked at one end of the conveyor belt 11, and the pneumatic slider 24 drives the movable plate 25 to slide horizontally along the slide rail 23, so that the movable plate 25 drives the first suction cup 29 at the driving end of the first driving member 26 to move back and forth between the packaging bag 100 stacking position and the loading position of the conveyor belt 11. When taking and placing the packaging bag 100, the first driving member 26 drives the first connecting frame 27 to move downward, so that the first connecting frame 27 drives the first suction cup 29 at the bottom of the first elastic telescopic column 28 to perform adsorption and release actions. The setting of the first elastic telescopic column 28 can ensure that the first suction cup 29 is tightly attached to the packaging bag 100, so that the packaging bag 100 can be evenly placed on the top of the conveyor belt 11, and then the motor 15 drives the driving roller 14 to rotate intermittently, so that the driving roller 14 drives the conveyor belt 11 to transmit forward intermittently, thereby realizing intermittent transportation of the packaging bag 100.

[0064] When the packaging bag 100 moves to the bottom of the first visual sensor 3, the visual sensor 3 detects printing defects on the top side of the packaging bag 100. The visual detection principle of the visual sensor 3 is existing technology and will not be repeated here.

[0065] The packaging bag 100 that has passed the inspection on one side is then conveyed to the workstation of the flip assembly 4. At this time, the second driving member 42 drives the second connecting frame 43 to move downward, so that the second connecting frame 43 presses the second suction cup 45 against the top of the packaging bag 100 through the second elastic telescopic column 44. At this time, the second suction cup 45 is located on the side of the packaging bag 100 close to the seal. Then, the second suction cup 45 is driven upward to a certain height by the second driving member 42. When the conveyor belt 11 drives the packaging bag 100 forward again, one side of the packaging bag 100 is adsorbed and held by the second suction cup 45. The other side of the packaging bag 100 remains stationary, and continues to move forward with the conveyor belt 11, thereby turning over the packaging bag 100. The turned packaging bag 100 is then conveyed to the bottom of the next visual sensor 3 for printing defect detection. After the two-side detection, the packaging bag 100 moves to the unloading end under the conveyor belt 11. At this time, the loading and unloading assembly 2 at the unloading end also uses the first suction cup 29 to adsorb the packaging bag 100 and lift it and then transfer it horizontally. The packaging bag 100 that fails the inspection moves downward and falls under the conveying action of the conveyor belt 11, realizing automatic sorting after detection.

[0066] Its advantages are that the flipping component 4 is set to flip the packaging bag 100, so that printing defects on both sides of the packaging bag 100 can be detected before and after flipping, thereby ensuring the comprehensiveness of printing defect detection, and under the intermittent conveying effect of the conveyor belt 11, the detection time of the visual sensor 3 on the packaging bag 100 is increased, preventing the continuous movement of the packaging bag 100 from interfering with the detection, and making the detection result of the visual sensor 3 more accurate; by setting the loading and unloading components 2 at both ends of the conveyor belt 11 to load and unload the packaging bag 100, the packaging bag 100 can be automatically loaded and unloaded and sorted to ensure the detection efficiency of the packaging bag 100.

[0067] When the flipping assembly 4 in the packaging bag 100 defect detection device based on visual imaging of the present application flips the packaging bag 100, the side of the packaging bag 100 that moves along the conveyor belt 11 may slip or wrinkle, which has a significant impact on the appearance of the packaging bag 100 and the flatness after flipping, resulting in reduced production quality of the packaging bag 100 and reduced accuracy of printing defect detection;

[0068] In order to improve the stability of the packaging bag 100 during the flipping process and reduce the negative impact caused by the flipping process, connecting parts 6 are arranged at equal intervals on the outside of the conveyor belt 11, and auxiliary rollers 5 are arranged between the two connecting parts 6 corresponding to each other on both sides. When the loading and unloading components 2 are loading, the rollers 52 at both ends of the auxiliary rollers 5 are connected by the connecting shaft 51 and are located at the top of the limiting rail 13. The rollers 52 are supported by the limiting rail 13 so that the connecting shaft 51 is located at the top of the inclined slide hole 61, and the auxiliary rollers 5 are located above the conveyor belt 11.

[0069] When the loading and unloading assembly 2 completes the loading work, the packaging bag 100 is transported to the visual sensor 3 under the drive of the conveyor belt 11. At the same time, the conveyor belt 11 drives the rollers 52 at both ends of the auxiliary roller 5 to separate from the top of the limiting rail 13 through the connecting piece 6, so that the auxiliary roller 5 relies on automatic gravity to move downward along the inclined slide hole 61. When the connecting shaft 51 is located at the bottom of the inclined slide hole 61, the connecting shaft 51 drives the auxiliary roller 5 to be located at the top of the packaging bag 100, and at the edge of the sealed side of the packaging bag 100, to prevent the printing area on the top side of the packaging bag 100 from being blocked.

[0070] When the packaging bag 100 is conveyed to the workstation corresponding to the flipping assembly 4 after being detected by the first visual sensor 3, when the conveyor belt 11 stops moving, the second connecting frame 43 is driven to move downward by the second driving member 42, so that the limit plate 47 on the outside of the second connecting frame 43 approaches the connecting shaft 51, and finally the first inclined surface 471 on one side of the limit plate 47 is attached to the outside of the connecting shaft 51, and as the second connecting frame 43 descends, the connecting shaft 51 is squeezed to move toward the inside of the horizontal sliding hole 62. At this time, the connecting shaft 51 drives the auxiliary roller 5 to move toward the printing area on the top side of the packaging bag 100, thereby leaking part of the sealed side of the packaging bag 100, making room for the subsequent adsorption action of the second suction cup 45.

[0071] After the second suction cup 45 absorbs the packaging bag 100, the second connecting frame 43 is quickly driven upward by the second driving member 42, so that the bottom of the limiting plate 47 and the bottom of the second suction cup 45 are respectively located above the connecting shaft 51 and the auxiliary roller 5, to prevent interference with the forward movement of the auxiliary roller 5.

[0072] When the auxiliary roller 5 moves forward driven by the conveyor belt 11, the conveyor belt 11 drives the auxiliary roller 5 to smooth the packaging bag 100 to prevent the packaging bag 100 from curling and wrinkling when it is turned over. When the conveyor belt 11 stops moving again, the second suction cup 45 first releases the packaging bag 100. At this time, the released end of the packaging bag 100 falls from a high place. The distance between two adjacent auxiliary rollers 5 is greater than the length of the packaging bag 100, preventing the turned-over packaging bag 100 from overlapping with the next packaging bag 100.

[0073] In order to prevent the released end of the packaging bag 100 from being deflected by air resistance during the falling process, gas is blown downward through the blow pipe 48 on the side of the second suction cup 45 to apply downward pressure to the packaging bag 100, so that the packaging bag 100 is turned over and laid flat on the top of the conveyor belt 11 to be transported to the bottom of the next visual sensor 3 for printing defect detection; when the limit plate 47 is away from the connecting shaft 51, under the action of the second inclined surface 63, the auxiliary roller 5 relies on its own gravity to reset to the bottom of the inclined slide hole 61, so as to ensure that the several auxiliary rollers 5 passing under the second suction cup 45 are restored to an equidistant state, so that the space between the two adjacent auxiliary rollers 5 remains unchanged, which is used to place the turned-over packaging bag 100.

[0074] It is worth mentioning that the above installation method has the following advantages:

[0075] Advantage 1: By arranging the auxiliary roller 5 on the outside of the conveyor belt 11 to limit the position of the packaging bag 100, when the auxiliary roller 5 is driven by the conveyor belt 11 to move forward, the packaging bag 100 can be turned over in cooperation with the second suction cup 45. At the same time, the packaging bag 100 slides on the outside of the auxiliary roller 5, which can smooth the packaging bag 100 and prevent wrinkles from forming during the turning process that affect subsequent visual inspection work.

[0076] Advantage 2: The auxiliary roller 5 is supported by the connecting member 6. When the conveyor belt 11 drives the rollers 52 at both ends of the auxiliary roller 5 to separate from the limiting rails 13, the auxiliary roller 5 falls down along the inclined slide hole 61 by automatic gravity. Finally, the auxiliary roller 5 moves from the outside of the packaging bag 100 to the top side and is located on the sealing side of the packaging bag 100, preventing the printing area of the packaging bag 100 from being blocked and affecting visual inspection.

[0077] Advantage three: By providing the horizontal sliding hole 62 to limit the lateral movement of the auxiliary roller 5, before the second suction cup 45 absorbs the packaging bag 100, the limiting plate 47 pushes the connecting shaft 51 to drive the auxiliary roller 5 to move laterally inside the horizontal sliding hole 62, so that the auxiliary roller 5 is automatically moved out of position before absorption, so that the second suction cup 45 is absorbed on the outer side of the sealed end of the packaging bag 100, thereby preventing the packaging bag 100 from folding during the turning process;

[0078] Advantage 4: By providing the second inclined surface 63 at the bottom of the horizontal sliding hole 62, when the second suction cup 45 absorbs the packaging bag 100, the second suction cup 45 and the limiting plate 47 move upward, and the auxiliary rollers 5 again move back to the bottom of the inclined sliding hole 61 by their own gravity, so as to ensure that the distance between each auxiliary roller 5 is equal, thereby preventing the packaging bag 100 from turning over.

[0079] Advantage 5: The second inclined surface 63 ensures that the roller 52 is always located at the bottom of the inclined slide hole 61. When the conveyor belt 11 drives the auxiliary roller 5 to start and stop, the auxiliary roller 5 is prevented from moving inside the horizontal slide hole 62, thereby preventing the roller 52 from colliding with the connecting member 6 and generating noticeable noise.

[0080] Advantage six: By setting an inclined sliding hole 61 and a horizontal sliding hole 62 on the inner side of the connecting member 6, the movement of the auxiliary roller 5 is guided to ensure that the auxiliary roller 5 can move on the top of the packaging bag 100. When the conveyor belt 11 drives the connecting member 6 to move downward, the inclined sliding hole 61 gradually deflects downward. At this time, the auxiliary roller 5 automatically returns to the top of the inclined sliding hole 61 by its own gravity, and then cooperates with the limiting rail 13 to achieve continuous recycling.

[0081] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the protection scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A packaging bag defect detection device based on visual imaging, characterized in that: include: An inspection platform, wherein a conveyor belt for conveying packaging bags is provided inside the inspection platform; Loading and unloading components are set on the top of the inspection table and located at both ends of the conveyor belt, used for loading and unloading packaging bags before and after inspection; Two visual sensors are fixed on the top of the inspection table, one for inspecting printing defects on both sides of the packaging bag; The flip assembly is arranged on the top of the inspection table and is located between the two vision sensors; Auxiliary rollers, which are installed on the outside of the conveyor belt and are used to limit the position of the packaging bag when turning it over; Connectors are symmetrically arranged at both ends of the auxiliary roller, and the connectors are fixedly arranged on the outside of the conveyor belt to support the auxiliary roller to be located on the outside of the conveyor belt; Wherein, a connecting shaft is fixedly provided on the inner side of the auxiliary roller, and rollers are fixedly provided on both ends of the connecting shaft; an inclined sliding hole is opened on the inner side of the connecting member, and the connecting shaft is slidably provided in the inclined sliding hole; Wherein, the flip assembly includes: The second suction cup is used to be attached to the top of the packaging bag near the sealing end, and two second suction cups are provided, which are driven to move up and down by external force; a second connecting frame, used to connect the two second suction cups, wherein the second connecting frame is driven to move up and down by an external force; The limiting plates are fixedly arranged on both sides of the second connecting frame. A first inclined surface is arranged on one side of the limiting plates close to the connecting shaft, which is used to push the auxiliary roller to move from the edge of the packaging bag to the middle.

2. The packaging bag defect detection device based on visual imaging according to claim 1 is characterized in that: The loading and unloading components include: The frame is fixed horizontally on the top of the testing table; The movable plate is driven by an external force to slide on the inner side of the frame; The first suction cup is driven by external force to be lifted and lowered at the bottom of the movable plate, and two of them are provided for adsorbing the packaging bags for loading and unloading.

3. The packaging bag defect detection device based on visual imaging according to claim 1 is characterized in that: A limit rail is fixedly provided on the outer side of the detection platform corresponding to the feeding end of the conveyor belt for supporting the resetting roller.

4. The packaging bag defect detection device based on visual imaging according to claim 1 is characterized in that: A horizontal sliding hole is also provided on the inner side of the connecting piece, and the horizontal sliding hole is connected to the bottom of the inclined sliding hole, and is used to limit the lateral movement of the auxiliary roller; A second inclined surface is provided on the bottom side of the horizontal sliding hole, which is used to guide the auxiliary roller to automatically return to the bottom of the inclined sliding hole after the packaging bag is turned over.

5. The packaging bag defect detection device based on visual imaging according to claim 1 is characterized in that: The flip assembly also includes a blow pipe, which is fixedly arranged on the inner side of the fixed plate. The air outlet end of the blow pipe is located on the side of the second suction cup away from the first inclined surface, and is used for blowing air downward when the second suction cup releases the packaging bag.

6. The packaging bag defect detection device based on visual imaging according to claim 5 is characterized in that: The outer sides of the conveyor belt and the auxiliary roller are both provided with flexible contact layers.

7. The packaging bag defect detection device based on visual imaging according to claim 2, characterized in that: The loading and unloading assembly near the unloading end of the conveyor belt further includes a partition, which is fixedly arranged on the outside of the detection platform, and a waste opening for unloading is opened at the bottom of the detection platform.

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