Finished product visual detection device and detection method for gum spring festival scrolls

Abstract

The invention relates to the technical field of visual inspection, and provides a finished product visual inspection device and method for gum spring festival scrolls. A detection structure, a pasting structure and a turn-over structure are integrated in the first frame body. The detection structure adopts a combination of a 3D laser contourgraph and a bilateral industrial camera to perform three-dimensional contour scanning and thickness and uniformity detection on spring festival couplet gum; the pasting structure achieves directional winding of the protective film through a winding roller assembly, and automatic pasting and edge cutting of the protective film are completed in cooperation with a spring pressing block and a profiling concentric-square-shaped blade. The turnover structure realizes lossless turnover of spring festival scrolls through an annular air bag and a material guide chute, and an exhaust system is arranged in a material guide plate to assist in stabilizing the turnover process. The detection method comprises the working procedures of gum detection, protective film pasting, automatic face turning and front face detection, and unqualified products are sorted to a reworking station through an electric push rod. According to the invention, the technical problems of interference detection, turnover deformation and the like of the protective film in the traditional process are solved, and the full-inspection efficiency and precision of the gum spring festival scrolls are remarkably improved.

Description

Technical Field

[0001] The present invention relates to the technical field of visual inspection, and in particular to a finished product visual inspection device and inspection method for adhesive-backed spring festival couplets. Background Art

[0002] Spring Festival couplets are a key component of the "New Year Red" (a collection of red and festive decorations, including Spring Festival couplets and blessing characters) posted during the Lunar New Year. Their neatly balanced, concise, and elegantly written text depicts beautiful imagery and expresses New Year's wishes. They are both a unique literary form and an important vehicle for New Year's cultural traditions. Modern Spring Festival couplets commonly utilize adhesive backing instead of traditional paste, significantly enhancing their ease of posting. To ensure the quality of finished products, industrial production requires thorough inspection of adhesive thickness (±5μm tolerance), coating uniformity (≥95% coverage), and finished product dimensions (±1mm accuracy).

[0003] Existing detection technologies still have the following technical bottlenecks:

[0004] 1. The traditional process involves immediately covering the adhesive with a protective film before testing. This is affected by the transmittance deviation of the protective film substrate and the fluctuation of the hot pressing pressure, resulting in insufficient depth of field in the visual inspection system, causing blurred focus and high rates of adhesive leakage and bubble detection. Furthermore, after testing, the protective film must be removed and re-applied, causing repeated work.

[0005] 2. After completing the adhesive backing test, the font color and printing quality on the front of the Spring Festival couplets need to be tested. The traditional flipping mechanism lacks a tension control device, which causes the rice paper substrate (Young's modulus is about 3.5GPa) to produce irreversible deformation during flipping. Especially when the width of the Spring Festival couplets exceeds 1200mm, the wrinkle rate of the corners is high, which seriously affects the detection accuracy.

[0006] In response to the above problems, the present invention document proposes a finished product visual inspection device and inspection method for self-adhesive spring festival couplets. Summary of the Invention

[0007] The purpose of the present invention is to solve the shortcomings of the existing adhesive back detection after the protective film is pasted, which leads to low detection accuracy, time-consuming and labor-intensive re-adhesive film after detection, and folding of the spring festival couplets when the couplets are turned over to detect the front side, and to propose a finished product visual inspection device and inspection method for adhesive-backed spring festival couplets.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A finished product visual inspection device for adhesive-backed spring festival couplets comprises a first frame and a second frame, wherein the first frame and the second frame are each provided with a first conveyor belt and a second conveyor belt arranged up and down, and further comprises:

[0010] The detection structure is disposed in the first frame, comprising a first U-shaped frame fixed to the top of the first frame, a 3D laser profiler, two first industrial cameras, and a U-shaped plate, with a second industrial camera mounted on the top of the U-shaped plate;

[0011] The pasting structure includes a second U-shaped frame fixed to the top of the first frame, a top plate, and a winding roller assembly connected to the top plate. The winding roller assembly includes a first rotating shaft and a second rotating shaft with a protective film wound around them. The bottom of the top plate is provided with a spring-loaded pressure block and a circular blade matching the shape of the spring couplets.

[0012] The turning structure includes a rotating roller rotatably arranged in the first frame, an annular airbag coaxially fixed to the rotating roller, a circular airbag connected to the annular airbag, and a material guide plate provided with a material guide chute;

[0013] Among them, the 3D laser profiler scans the adhesive back of the spring festival couplets to form three-dimensional profile data, the two first industrial cameras obtain the adhesive thickness data from both sides, the second rotating shaft realizes the directional winding of the protective film through the engagement of the gear and the rack, the pressing block presses the protective film to the adhesive back of the spring festival couplets under the action of the spring, the circular blade cuts the protective film along the edge of the spring festival couplets, the annular airbag is inflated and clamps the spring festival couplets with the first conveyor belt, and after being guided by the material guide chute to complete the flipping, the second industrial camera performs front detection.

[0014] As a further improvement of the above technical solution:

[0015] The winding roller assembly also includes: multiple fixed rods vertically fixed to the bottom of the top plate, and the fixed rods are slidably connected to the connecting frame; four base plates are fixed to the bottom of the connecting frame in groups of two, and the first rotating shaft and the second rotating shaft are respectively rotatably connected between the base plates through damping bearings; a one-way bearing is fixed to the second rotating shaft, and the outer ring of the one-way bearing is fixed to a gear meshing with the rack.

[0016] The pasting structure also includes: a camera is fixed at the bottom of the connecting frame and faces the winding area of the second rotating shaft; a limit baffle is arranged on the inner wall of the second U-shaped frame to limit the downward movement of the connecting frame; a support plate horizontally passes through the first conveyor belt, and the upper surface of the support plate is coplanar with the cutting plane of the circular blade.

[0017] The flipping structure also includes: rubber wheels coaxially fixed at both ends of the rotating roller and in frictional contact with the first conveyor belt; a position sensor is arranged on the inner wall of the first frame to detect that the end of the spring festival couplet enters the clamping area between the rotating roller and the first conveyor belt; the output end of the third electric push rod is connected to the extrusion plate, and the extrusion plate and the circular airbag form an airtight cavity.

[0018] The guide plate is provided with: an exhaust cavity connected to the interior of the box through a return air duct; a plurality of exhaust holes are provided along the side wall of the guide chute and connected to the exhaust cavity; wherein, an arc plate is provided in the box to divert the air flow to the guide chute.

[0019] It also includes: a connecting plate horizontally connecting the conveyor belts of the first frame and the second frame; a first electric push rod is vertically arranged on the mounting plate, and the output end of the first electric push rod is connected to a push plate that can cover the width of the conveyor belt; wherein, the bottom of the push plate is provided with a block that matches the clearance of the conveyor belt surface.

[0020] The top of the U-shaped plate is equipped with an LED light source, whose illumination direction forms a 45° angle with the optical axis of the second industrial camera. An image processing unit is connected to the second industrial camera and equipped with a color comparison database. The scanning path of the 3D laser profiler includes a horizontal scanning line arranged along the direction of conveyance of the spring couplets and a vertical scanning matrix covering the width of the couplets. The scanned data is compared in real time with a preset tolerance range (adhesive thickness ±5μm, dimensional accuracy ±1mm).

[0021] The cutting edge of the circular blade is shaped as follows: the upper part is provided with a guide slope that slides with the pressing block; the lower part forms a contoured cutting edge that matches the edge contour of the spring couplets; wherein the cutting pressure of the circular blade is 20-35N / cm 2 .

[0022] In this application, the inspection method of the finished product visual inspection device of the self-adhesive spring festival couplets includes the following steps:

[0023] S1. Place the spring couplets coated with adhesive on the first conveyor belt of the first frame. During the conveying process, two first industrial cameras detect the thickness of the adhesive from both sides, and a 3D laser profiler scans the spring couplets to check the adhesive uniformity and external dimensions. Qualified products are conveyed to the second U-shaped frame for application of protective film. Unqualified products are pushed by the first electric push rod to push the push plate and are moved to the first conveyor belt of the second frame via the connecting plate for recycling and rework.

[0024] S2, when the spring couplets move to the bottom of the pressing block, the first conveyor belt pauses, and the second electric push rod pushes the top plate and the connecting frame downward so that the protective film fits the top of the spring couplets; when it continues to move downward, the top plate pushes the fixed plate and the circular blade downward through the fixed rod, the pressing block presses the protective film, and the circular blade cuts along the edge of the spring couplets; after cutting, the connecting frame and the top plate move up, and the second rotating shaft rotates counterclockwise under the action of the gear and rack to reel in the cut protective film;

[0025] S3. After the protective film is pasted, the first conveyor belt continues to convey the spring couplets to between the rotating roller and the first conveyor belt. One end of the spring couplet droops naturally, and the fan blows air through the exhaust pipe to make the spring couplet droop further, which is convenient for clamping and conveying. The third electric push rod is started to squeeze the circular airbag, and the annular airbag expands and clamps the spring couplets with the first conveyor belt. The friction between the rubber wheel and the first conveyor belt drives the rotating roller and the annular airbag to rotate, completing the downward conveyance.

[0026] S4. When the spring couplets are conveyed downward, one end enters the guide chute and moves to the left under the guidance of the inclined surface, and then moves to the second conveyor belt of the first frame after the front side is exposed. When the fan blows, part of the wind passes through the curved plate and the return air duct into the exhaust cavity and is discharged from the exhaust hole, thus helping the spring couplets to turn over stably.

[0027] S5. The second conveyor belt transports the turned-over Spring Festival couplets, and the second industrial camera detects the font and color on the front side; qualified products continue to be transported, and unqualified products are pushed by the first electric push rod and push plate to the second conveyor belt of the second frame for recycling and rework.

[0028] Beneficial effects: In the present invention, a 3D laser profiler is fixed to the top inner wall of the first U-shaped frame, two first industrial cameras are respectively fixed on both sides of the top of the first frame, a U-shaped plate is fixed inside the first frame, and the second industrial camera is fixed to the top inner wall of the U-shaped plate; when the spring festival couplets pass through the two first industrial cameras, the two first industrial cameras detect the thickness of the adhesive on both sides of the spring festival couplets, and the 3D laser profiler performs a three-dimensional scan on the spring festival couplets passing through, and detects the uniformity and external dimensions of the adhesive on the spring festival couplets; when the spring festival couplets pass through the U-shaped plate, the LED light source inside the U-shaped plate illuminates them, and the second industrial camera can clearly capture the front of the spring festival couplets and detect the font and color on the front of the spring festival couplets;

[0029] In the present invention, a plurality of fixing rods are fixed to the bottom of the top plate, and the outer walls of the plurality of fixing rods are slidingly sleeved with the same connecting frame, and the bottom of the connecting frame is rotatably connected to a first rotating shaft and a second rotating shaft, and the outer walls of the first rotating shaft and the second rotating shaft are fixedly sleeved with a winding roller, and the protective film is wound around the outer walls of the two winding rollers, and a circular blade is fixed to the bottom of the fixed plate; the protective film is rolled up by rotating the second rotating shaft, and the intact protective film is pulled out from the winding roller on the outer wall of the first rotating shaft, and then the protective film is tightly attached to the adhesive backing of the spring festival couplets and cut under the cooperation of the circular blade and the pressing block, which is simple to operate and improves the efficiency of pasting the protective film;

[0030] In the present invention, the outer wall of the second rotating shaft is sleeved with a one-way bearing, the outer ring of the one-way bearing is fixed with a gear, and the gear is meshed with the rack; after the cutting of the protective film is completed, the second electric push rod drives the connecting frame and the top plate to move up, and the second rotating shaft synchronously drives the one-way bearing and the gear to move up, and the gear rotates counterclockwise under the action of the rack, and the gear drives the second rotating shaft and the winding roller on its outer wall to rotate counterclockwise synchronously through the one-way bearing, so that the cut protective film can be rolled up, and the camera can shoot the rolling status of the protective film. When the camera can no longer detect the empty area after cutting in the protective film, the second electric push rod stops running, so that it is convenient to stick the protective film on the spring festival couplets again later;

[0031] In the present invention, one end of the rotating shaft of the rotating roller rotates and extends into the circular airbag, and a cavity connected to the circular airbag is provided in the rotating roller. A plurality of air guide tubes are fixed in the rotating roller, and the cavity is connected to the annular airbag through the air guide tube; when the position sensor does not detect the spring festival couplets, the air in the annular airbag is sucked into the circular airbag to increase the distance between the annular airbag and the first conveyor belt, so that one side of the spring festival couplets can be located between the annular airbag and the first conveyor belt, which is convenient for the later flipping and conveying of the spring festival couplets. After that, the air in the circular airbag is injected into the annular airbag, so that the annular airbag expands and cooperates with one end of the first conveyor belt to complete the clamping of the spring festival couplets, ensuring that the spring festival couplets can be smoothly conveyed downward and flipped, so as to facilitate the later detection of the front side.

[0032] In the present invention, the back glue inspection can be completed before the protective film is pasted, and the protective film can be quickly pasted after the inspection is completed. In addition, the spring festival couplets can be turned over during the transportation process to avoid folding of the spring festival couplets, thereby ensuring the accuracy of the font shape inspection of the spring festival couplets in the later stage. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 A schematic diagram of the three-dimensional structure of the finished product visual inspection device for adhesive-backed Spring Festival couplets provided in Example 1 of the present invention;

[0034] Figure 2 This is a schematic diagram of the main cross-sectional structure of the finished product visual inspection device for adhesive-backed Spring Festival couplets provided in Example 1 of the present invention;

[0035] Figure 3 A schematic diagram of a three-dimensional exploded structure of the first U-shaped frame and the first industrial camera of the finished product visual inspection device for adhesive-backed Spring Festival couplets provided in Example 1 of the present invention;

[0036] Figure 4 A schematic diagram of a three-dimensional exploded structure of the first frame, the second frame, and the first electric push rod of the finished product visual inspection device for adhesive-backed spring couplets provided in Example 1 of the present invention;

[0037] Figure 5A schematic diagram of a three-dimensional exploded structure of the first conveyor belt, the second conveyor belt, and the connecting plate of the finished product visual inspection device for self-adhesive spring festival couplets provided in Example 1 of the present invention;

[0038] Figure 6 A schematic diagram of the three-dimensional structure of the top plate, connecting frame, and circular blade of the finished product visual inspection device for adhesive-backed Spring Festival couplets provided in Example 1 of the present invention;

[0039] Figure 7 This is a schematic diagram of the front cross-sectional structure of the top plate, connecting frame and circular blade of the finished product visual inspection device for adhesive-backed spring festival couplets provided in Example 1 of the present invention;

[0040] Figure 8 A schematic diagram of a three-dimensional exploded structure of the first rotating shaft, the base plate, and the second rotating shaft of the finished product visual inspection device for adhesive-backed spring festival couplets provided in Example 1 of the present invention;

[0041] Figure 9 A schematic diagram of a three-dimensional exploded structure of the connecting frame, fixing plate and pressing block of the finished product visual inspection device for adhesive-backed Spring Festival couplets provided in Example 1 of the present invention;

[0042] Figure 10 A schematic diagram of a three-dimensional exploded cross-section of the extrusion plate, box body, and rotating roller of the finished product visual inspection device for self-adhesive spring festival couplets provided in Example 1 of the present invention;

[0043] Figure 11 A schematic top view of the cross-sectional structure of the rotating roller, circular airbag, and annular airbag of the finished product visual inspection device for self-adhesive spring couplets provided in Example 1 of the present invention;

[0044] Figure 12 This is a schematic diagram of the three-dimensional cross-sectional structure of the box and the guide plate of the finished product visual inspection device for self-adhesive spring couplets provided in Example 2 of the present invention.

[0045] In the figure: 1. First frame; 2. Second frame; 3. First conveyor belt; 4. Second conveyor belt; 5. First industrial camera; 6. First U-shaped frame; 7. 3D laser profiler; 8. Connecting plate; 9. Mounting plate; 10. First electric push rod; 11. Push plate; 12. Stop block; 13. Second U-shaped frame; 14. Second electric push rod; 15. Top plate; 16. Fixed rod; 17. Limit plate; 18. Connecting frame; 19. First rotating shaft; 20. Winding roller; 21. Base plate; 22. Damping bearing; 23. Protective film; 24. Second rotating shaft; 25. One-way bearing; 26. Gear; 27 , rack; 28. Limit baffle; 29. Fixed plate; 30. Return blade; 31. Pressure block; 32. Spring; 33. Camera; 34. Support plate; 35. Rotating roller; 36. Rubber wheel; 37. Cavity; 38. Air duct; 39. Annular airbag; 40. Circular airbag; 41. Extrusion plate; 42. Third electric push rod; 43. Position sensor; 44. Box; 45. Fan; 46. Exhaust pipe; 47. Guide plate; 48. Guide chute; 49. U-shaped plate; 50. Second industrial camera; 51. Arc plate; 52. Return air duct; 53. Exhaust cavity; 54. Exhaust hole. DETAILED DESCRIPTION

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0047] Example 1: Reference Figure 1 、 Figure 2 and Figure 4 The inspection device relates to the technical field of spring festival couplet processing. The finished product visual inspection device of the self-adhesive spring festival couplets comprises a first frame 1 and a second frame 2. A first conveyor belt 3 and a second conveyor belt 4 are arranged inside the first frame 1 and the second frame 2, and the first conveyor belt 3 is located above the adjacent second conveyor belt 4.

[0048] Reference Figure 1 、 Figure 4 and Figure 5Two connecting plates 8 are fixedly mounted between the first frame 1 and the second frame 2. They connect the adjacent first conveyor belts 3 and the adjacent second conveyor belts 4. This design allows unqualified Spring Festival couplets to be smoothly moved from the first and second conveyor belts 3 and 4 within the first frame 1 to the first and second conveyor belts 3 and 4 within the second frame 2, facilitating subsequent inspection or processing. Two mounting plates 9 are fixedly mounted on the side of the first frame 1 facing away from the second frame 2. A first electric push rod 10 is fixed to the top of each mounting plate 9. When the first electric push rod 10 is activated, its output shaft extends into the first frame 1 and is secured with a push plate 11. The bottoms of the two push plates 11 contact the tops of the first and second conveyor belts 3 and 4, respectively, ensuring that as the push plates 11 move, they accurately push unqualified Spring Festival couplets from the first and second conveyor belts 3 and 4 into the second frame 2. Stoppers 12 are fixed to one side of each push plate 11. The two stops 12 are respectively located on both sides of the first electric push rod 10 and play a role of limiting and guiding, thereby ensuring that the push plate 11 remains stable during the movement.

[0049] Reference Figure 1-Figure 3 , a first U-shaped frame 6 is fixed on the top of the first frame 1, and a 3D laser profiler 7 is fixed to the inner wall of the top of the first U-shaped frame 6 with the help of bolts. Its function is to detect the uniformity of the adhesive backing of the spring festival couplets and the appearance of the spring festival couplets. Two first industrial cameras 5 are fixed on both sides of the top of the first frame 1 and are located on both sides of the first U-shaped frame 6. They are used to detect the thickness of the adhesive backing of the spring festival couplets. A U-shaped plate 49 is fixed in the first frame 1. The U-shaped plate 49 is located between the first conveyor belt 3 and the second conveyor belt 4. The second industrial camera 50 is fixed on the inner wall of the top of the U-shaped plate 49 to detect the font of the spring festival couplets after turning over. At the same time, an LED light source is fixed on the inner wall of the top of the U-shaped plate 49 to provide lighting for the spring festival couplets.

[0050] Reference Figure 1 、 Figure 2 and Figure 4-Figure 9A second U-shaped frame 13 is fixed on the top of the first frame 1, and a protective film 23 is set inside the second U-shaped frame 13 for applying the adhesive film to the back of the spring festival couplets. A pasting structure is set inside the second U-shaped frame 13, which includes a second electric push rod 14 fixed and running through the second U-shaped frame 13. The output shaft of the second electric push rod 14 is fixedly connected to the top of the top plate 15. Multiple fixing rods 16 are fixed to the bottom of the top plate 15, and the outer walls of the multiple fixing rods 16 are slidably sleeved with the same connecting frame 18. Four base plates 21 are fixed at the bottom of the connecting frame 18. The four base plates 21 are grouped in pairs, and the two base plates 21 in the same group are respectively connected to the first rotating shaft 19 and the second rotating shaft 24 by rotation. The outer walls of the first rotating shaft 19 and the second rotating shaft 24 are fixed with winding rollers 20 by bolts. The protective film 23 is wrapped around the outer walls of the two winding rollers 20. The winding roller 20 on the outer wall of the second rotating shaft 24 can be rotated to reel up the intact protective film 23 on the outer wall of the first rotating shaft 19, making it convenient to paste the protective film 23 for the next spring festival couplet. Two damping bearings 22 are sleeved on the outer wall of the first rotating shaft 19, and the two damping bearings 22 are fixedly connected to the adjacent base plates 21 respectively. The outer walls of multiple fixed rods 16 are welded and fixed to the limit plates 17 located below the connecting frame 18, which are used to limit the connecting frame 18. The bottom ends of multiple fixed rods 16 are fixed with the same fixed plate 29, and the bottom of the fixed plate 29 is fixed with multiple springs 32. The bottom ends of multiple springs 32 are fixed with the same pressure block 31. The fixed plate 29 squeezes the pressure block 31 through the spring 32, so that the pressure block 31 tightly fits the protective film 23 on the back glue of the spring couplets. The bottom of the fixed plate 29 is fixed with a circular blade 30, and the circular blade 30 fits the shape of the spring couplets and is used to cut the protective film 23 after fitting. The pressure block 31 is slidably set on the outer wall of the circular blade 30 to ensure that the pressure block 31 slides stably.

[0051] Specifically, the output shaft of the second electric push rod 14 pushes the top plate 15 and connecting frame 18 downward as a whole until the protective film 23 is in contact with the top of the spring couplets. At this point, the limit baffle 28 can limit the position of the connecting frame 18. The second electric push rod 14 continues to push the top plate 15 downward. The top plate 15 pushes the fixed plate 29 and the circular blade 30 downward via the fixed rod 16. The pressure block 31, under the action of the spring 32 and the fixed plate 29, tightly fits the protective film 23 to the top of the spring couplets. The downward movement of the fixed plate 29 and the circular blade 30 can cut the protective film 23 along the edge of the spring couplets. When the first conveyor belt 3 transports the spring couplets, the position of the spring couplets is manually adjusted to ensure that they are on the same center line as the fixed plate 29 and the circular blade 30, facilitating the circular blade 30 to cut the protective film 23 on the spring couplets.

[0052] Reference Figure 7 and Figure 8The pasting structure also includes a camera 33 fixed by bolts at the bottom of the connecting frame 18, and the lens of the camera 33 is aimed at the position on the second rotating shaft 24 for winding the protective film 23 after cutting. The purpose of this setting is that in subsequent operations, the camera 33 can clearly capture the winding status of the protective film 23, providing a guarantee for the subsequent pasting of the protective film 23 on the adhesive backing of the Spring Festival couplets. A one-way bearing 25 is sleeved on the outer wall of the second rotating shaft 24, and a special tool is used to fix the inner ring of the one-way bearing 25 to the second rotating shaft 24 to ensure that there is no relative rotation between the two. Then, a gear 26 is fixed to the outer ring of the one-way bearing 25 by welding, so that the gear 26 and the one-way bearing 25 become a whole. The second rotating shaft 24 with the gear 26 fixed is installed to the corresponding position so that the gear 26 is meshed with the rack 27. This meshing relationship, combined with the one-way bearing 25, allows the second rotating shaft 24 to only rotate in one direction.

[0053] Specifically, after the protective film 23 is cut, the second electric push rod 14 is activated, and its output shaft drives the connecting frame 18 and top plate 15 upward. Because the second rotating shaft 24 is connected to the connecting frame 18 and other components, it simultaneously drives the one-way bearing 25 and gear 26 upward. At this point, gear 26 rotates counterclockwise under the action of the rack 27. The characteristics of the one-way bearing 25 enable gear 26 to drive the second rotating shaft 24 and the winding roller 20 on its outer wall to rotate counterclockwise synchronously, thereby rewinding the cut protective film 23.

[0054] During the rewinding process, the camera 33 continuously captures the rewinding status of the protective film 23. When the camera 33 no longer detects the cutout empty area in the protective film 23, it indicates that the protective film 23 has been rewound to the appropriate position. At this time, the second electric push rod 14 stops running, preparing for the subsequent pasting of the protective film 23 on the spring festival couplets.

[0055] Reference Figure 2 and Figure 6 , in the first frame 1, a support plate 34 is fixedly installed below the protective film 23. This support plate 34 runs through the first conveyor belt 3, providing stable support for the circular blade 30 to cut the protective film 23 and the pressing block 31 to press the protective film 23. This design not only improves the accuracy of cutting and pressing, but also protects the first conveyor belt 3 from damage. A plurality of limit baffles 28 are fixed on the inner walls on both sides of the second U-shaped frame 13 that are away from each other. It is used to limit the connecting frame 18. During the movement of the connecting frame 18, the limit baffle 28 can ensure that it moves along the predetermined path to avoid deviation or collision.

[0056] Pasting structure: It can accurately roll up the cut protective film 23 and detect the rolling status through the camera 33 to ensure that the protective film 23 can be smoothly pasted on the adhesive backing of the Spring Festival couplets later, thereby improving the accuracy and efficiency of pasting the protective film 23.

[0057] Reference Figure 2 A turning structure is provided in the first frame 1 , including a material guide plate 47 fixed in the first frame 1 and a rotating roller 35 rotating in the first frame 1 .

[0058] Reference Figure 2 and Figure 10 The flipping structure includes two rubber wheels 36 fixedly connected to the outer wall of the rotating roller 35 by bolts, ensuring that the rubber wheels 36 and the rotating roller 35 are firmly fixed. The rotating roller 35 is installed on the side of the first conveyor belt 3 away from the second U-shaped frame 13, so that the rubber wheels 36 contact the first conveyor belt 3. With this arrangement, the friction between the first conveyor belt 3 and the rubber wheels 36 can drive the rotating roller 35 to rotate. The rotating roller 35 cooperates with one end of the first conveyor belt 3 to clamp and convey the spring festival couplets. A guide plate 47 is installed below the rotating roller 35, ensuring that the guide plate 47 is above the second conveyor belt 4. A guide chute 48 is machined on one side of the guide plate 47. When the spring festival couplets are conveyed downward by the rotating roller 35, the guide chute 48 can guide one end of the couplet to the left, thereby achieving the flipping of the couplets.

[0059] Reference Figure 2 and Figure 10 A box 44 is fixed to the top of the first frame 1 with bolts, and a fan 45 is installed in the box 44 to ensure that the fan 45 can operate normally. An exhaust pipe 46 is connected to the bottom of the box 44 via a flange. The exhaust pipe 46 conveys the wind generated by the fan 45 downward, causing one end of the spring festival couplets to bend downward under the action of the wind, and cooperates with the rotating roller 35 and the first conveyor belt 3 to complete the operation of conveying the spring festival couplets downward.

[0060] Flipping structure: Through the cooperation of the rubber wheel 36 and the first conveyor belt 3, the Spring Festival couplets can be stably clamped and conveyed, and the guide plate 47 and the guide chute 48 are used to realize the flipping of the Spring Festival couplets, which provides convenience for subsequent processing.

[0061] Reference Figure 10 and Figure 11The flip structure also includes an annular airbag 39, which is glued and fixed to the outer wall of the rotating roller 35, ensuring a tight fit between the annular airbag 39 and the rotating roller 35. A circular airbag 40 is glued to one side of the first frame 1. One end of the rotating shaft of the rotating roller 35 is rotated and extended into the circular airbag 40. A rotating bearing is provided within the circular airbag 40 to ensure the normal rotation of the rotating roller 35. A third electric push rod 42 is bolted through the first frame 1. The output shaft of the third electric push rod 42 is bolted to an extrusion plate 41, which is tightly connected to one side of the circular airbag 40. This arrangement allows the third electric push rod 42 to move the extrusion plate 41, squeezing the air in the circular airbag 40 into the rotating roller 35. A cavity 37 is machined into the rotating roller 35 to communicate with the circular airbag 40. Multiple air ducts 38 are welded to the rotating roller 35, ensuring communication between the cavity 37 and the annular airbag 39. In this way, when the air in the circular airbag 40 is squeezed, it can be injected into the annular airbag 39 through the cavity 37 and the air guide tube 38, thereby controlling the expansion of the annular airbag 39 to complete the squeezing of the spring festival couplets. A position sensor 43 is fixed to the inner wall of one side of the first frame 1 by bolts, which is used to detect whether one side of the spring festival couplet is located between the rotating roller 35 and the first conveyor belt 3.

[0062] Specifically, when one end of the spring couplets droops between the rotating roller 35 and the first conveyor belt 3 under the force of the wind from the fan 45, the position sensor 43 detects the position of the couplets and activates the third electric push rod 42. The output shaft of the third electric push rod 42 drives the extrusion plate 41 to squeeze the circular airbag 40. The air in the circular airbag 40 is then injected into the annular airbag 39 through the cavity 37 and the air guide tube 38. The annular airbag 39 expands and cooperates with the first conveyor belt 3 to tightly clamp the spring couplets. The cooperation between the two then drives the rotating roller 35 and the annular airbag 39 to rotate, thus completing the downward conveyance of the spring couplets.

[0063] When the position sensor 43 does not detect the Spring Festival couplets, the third electric push rod 42 pushes the extrusion plate 41 to move outward, sucking the air in the annular airbag 39 into the circular airbag 40, increasing the distance between the annular airbag 39 and the first conveyor belt 3, so that one side of the Spring Festival couplets can be located between the annular airbag 39 and the first conveyor belt 3, preparing for the later flipping and conveying of the Spring Festival couplets.

[0064] Flipping structure: Under the detection of the position sensor 43, the expansion and contraction of the annular airbag 39 can be automatically controlled according to the position of the Spring Festival couplets, so as to achieve precise clamping and transportation of the Spring Festival couplets, improve the accuracy and stability of the flipping of the Spring Festival couplets, and ensure that the entire device can operate efficiently and stably.

[0065] The device can achieve comprehensive inspection of the appearance, fonts, and adhesive backing of Spring Festival couplets. The 3D laser profiler 7 and the first industrial camera 5 in the detection structure can respectively detect the appearance of the Spring Festival couplets and the thickness and uniformity of the adhesive backing, while the second industrial camera 50 detects the font of the Spring Festival couplets after turning over. The pasting structure can accurately adhere the protective film 23 to the adhesive backing of the Spring Festival couplets and cut it with a circular blade 30 to ensure the quality of the film. The flipping structure ensures that both the front and back of the Spring Festival couplets can be effectively inspected, improving the accuracy and comprehensiveness of the inspection and ensuring the quality of the finished Spring Festival couplets with adhesive backing. The entire device has a reasonable structure, feasible operation, and practical application value.

[0066] The first industrial camera 5 and the second industrial camera 50 are both Hikvision MV-CA050-10GC cameras.

[0067] Example 2: Reference Figure 12 , improved on the basis of Example 1: an arc-shaped plate 51 is welded and fixed on the inner wall of one side of the box body 44. This arc-shaped plate 51 is designed to guide the wind force generated by the fan 45 to one side, thereby improving the utilization efficiency of the wind force. On one side of the box body 44, a return air duct 52 is fixed to cooperate with the arc-shaped plate 51. One end of this return air duct 52 is fixedly extended into the exhaust cavity 53 in the guide plate 47. When the fan 45 drives the wind to blow downward through the exhaust duct 46, part of the wind force will enter the exhaust cavity 53 through the arc-shaped plate 51 and the return air duct 52. A plurality of exhaust holes 54 are provided on the inner wall of one side of the guide chute 48. These exhaust holes 54 are connected to the exhaust cavity 53, so that the air in the exhaust cavity 53 can be transported to one side through the exhaust holes 54. This design ensures that when the spring couplets are transported downward, one end thereof can extend into the material guide chute 48 and move to the left under the guidance of the inclined surface of the material guide chute 48, thereby completing the turning over of the spring couplets and exposing the front side.

[0068] Specifically, when the spring couplets move onto the second conveyor belt 4 within the first frame 1, their front sides are exposed, facilitating later inspection. Furthermore, when fan 45 drives air downward through exhaust duct 46, a portion of the wind passes through curved plate 51 and return air duct 52 into exhaust chamber 53 and is discharged to the left through exhaust hole 54. This design ensures that one side of the spring couplets can be stably flipped over, improving efficiency and accuracy.

[0069] This detection device is not only used for the detection of Spring Festival couplets, but can also be used in other detection fields.

[0070] The inspection method of the finished product visual inspection device of the self-adhesive spring festival couplets comprises the following steps:

[0071] S1. Place the spring festival couplets coated with adhesive on the first conveyor belt 3 in the first frame 1, convey the couplets to one side, and when passing through the two first industrial cameras 5, the two first industrial cameras 5 detect the thickness of the adhesive from both sides of the couplets, and the 3D laser profiler 7 performs a three-dimensional scan on the passing spring festival couplets to detect the uniformity and external dimensions of the adhesive on the couplets. When the thickness, uniformity and size of the adhesive meet the standards, the first conveyor belt 3 conveys them to the second U-shaped frame 13 for pasting of the protective film 23. When one of the items is unqualified, the output shaft of the first electric push rod 10 pushes the push plate 11 to move. The push plate 11 pushes the unqualified spring festival couplets on the first conveyor belt 3 through the adjacent connecting plate 8 to the first conveyor belt 3 in the second frame 2. The unqualified spring festival couplets are collected and reprocessed. When pushing the unqualified spring festival couplets, the first conveyor belt 3 in the first frame 1 stops running.

[0072] S2. When the spring couplets move to below the pressing block 31, the first conveyor belt 3 stops running, and the output shaft of the second electric push rod 14 pushes the top plate 15 and the connecting frame 18 to move downward as a whole until the protective film 23 fits the top of the spring couplets. At this time, the limit baffle 28 can limit the connecting frame 18, and the second electric push rod 14 continues to push the top plate 15 downward. The top plate 15 pushes the fixed plate 29 and the return blade 30 downward through the fixed rod 16. The pressing block 31 tightly fits the protective film 23 to the top of the spring couplets under the action of the spring 32 and the fixed plate 29, and the fixed plate 29 and the return blade 30 move downward to cut the protective film 23 along the edge of the spring couplets (when the first conveyor belt 3 transports the spring couplets, the position of the spring couplets is manually adjusted to ensure that it is in contact with the fixed plate 2 9. The return blade 30 is on the same center line, which is convenient for the return blade 30 to cut the protective film 23 on the spring festival couplets). After the cutting is completed, the second electric push rod 14 drives the connecting frame 18 and the top plate 15 to move upward, and the second rotating shaft 24 synchronously drives the one-way bearing 25 and the gear 26 to move upward. The gear 26 rotates counterclockwise under the action of the rack 27. The gear 26 drives the second rotating shaft 24 and the winding roller 20 on its outer wall to rotate counterclockwise synchronously through the one-way bearing 25, so that the cut protective film 23 can be rolled up, and the camera 33 can shoot the rolling status of the protective film 23. When the camera 33 can no longer detect the empty area after the cutting in the protective film 23, the second electric push rod 14 stops running, which is convenient for pasting the protective film 23 on the spring festival couplets again in the later stage.

[0073] S3. After the protective film 23 is pasted, the first conveyor belt 3 continues to convey until it is conveyed between the rotating roller 35 and the first conveyor belt 3. One end of the spring couplet naturally droops under the action of gravity. In addition, the fan 45 blows air downward through the exhaust pipe 46, which can make one end of the spring couplet droop further, making it easier for the rotating roller 35 and the first conveyor belt 3 to cooperate in clamping the spring couplet and conveying it downward. In addition, when one end of the spring couplet droops between the rotating roller 35 and the first conveyor belt 3, the position sensor 43 detects the position of the spring couplet and starts the third electric push rod 42 to drive the extrusion plate 41 to squeeze the circular airbag 40. The air in the circular airbag 40 is injected into the annular airbag through the cavity 37 and the air guide tube 38. 39, the annular airbag 39 expands, so that the annular airbag 39 cooperates with the first conveyor belt 3 to tightly clamp the spring festival couplets (when the position sensor 43 does not detect the spring festival couplets, the third electric push rod 42 pushes the extrusion plate 41 to move outward, and the air in the annular airbag 39 is sucked into the circular airbag 40, which is used to increase the distance between the annular airbag 39 and the first conveyor belt 3, so that one side of the spring festival couplets can be located between the annular airbag 39 and the first conveyor belt 3, which is convenient for the later turning over and conveying of the spring festival couplets). In addition, the rubber wheel 36 contacts the first conveyor belt 3, and can drive the rotating roller 35 and the annular airbag 39 to rotate through the friction between the two, thereby completing the downward conveying of the spring festival couplets;

[0074] S4. When the spring festival couplets are conveyed downward, one end of the spring festival couplets extends into the guide chute 48 and moves to the left under the guidance of the inclined surface of the guide chute 48, thereby completing the turning over of the spring festival couplets and exposing the front side. The spring festival couplets are then moved to the second conveyor belt 4 in the first frame 1 to facilitate later inspection. In addition, when the fan 45 drives the wind to blow downward through the exhaust pipe 46, a part of the wind passes through the curved plate 51 and the return air pipe 52 into the exhaust cavity 53 and is discharged to the left through the exhaust hole 54, ensuring that one side of the spring festival couplets can be turned over stably.

[0075] S5. The second conveyor belt 4 conveys the turned-over spring festival couplets to the left. When passing through the U-shaped plate 49, the LED light source in the U-shaped plate 49 illuminates it. The second industrial camera 50 can clearly photograph the front of the spring festival couplets and detect the font and color of the front of the spring festival couplets. When the spring festival couplets are qualified, the second conveyor belt 4 continues to convey them to one side. When they are unqualified, the first electric push rod 10 and the push plate 11 cooperate to push the spring festival couplets on the second conveyor belt 4 in the first frame 1 to the second conveyor belt 4 in the second frame 2 for recycling and rework.

[0076] However, as is well known to those skilled in the art, the working principles and wiring methods of the fan 45, the third electric push rod 42, the position sensor 43, the camera 33, the second electric push rod 14, the first industrial camera 5, the first electric push rod 10 and the 3D laser profiler 7 are commonplace, and are all conventional means or common knowledge, and will not be elaborated here. Those skilled in the art can make any optional selections according to their needs or convenience.

[0077] The drawings in this application are for illustrative purposes only. The sizes and shapes of the components shown are not intended to be limiting, but are merely for illustrative purposes. In actual implementation, the components may be appropriately configured and adjusted based on specific needs and actual conditions.

[0078] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A finished product visual inspection device for adhesive-backed spring couplets, comprising a first frame (1) and a second frame (2), wherein the first frame (1) and the second frame (2) are both provided with a first conveyor belt (3) and a second conveyor belt (4) arranged up and down, characterized in that: Also includes: A detection structure is arranged in a first frame (1), comprising a first U-shaped frame (6) fixed on the top of the first frame (1), a 3D laser profiler (7), two first industrial cameras (5), and a U-shaped plate (49), wherein a second industrial camera (50) is installed on the top of the U-shaped plate (49); The pasting structure comprises a second U-shaped frame (13) fixed on the top of the first frame (1), a top plate (15), and a reel assembly connected to the top plate (15); the reel assembly comprises a first rotating shaft (19) and a second rotating shaft (24) wound with a protective film (23); a pressing block (31) with a spring (32) and a circular blade (30) matching the shape of the spring couplet are provided at the bottom of the top plate (15); The turning structure comprises a rotating roller (35) rotatably arranged in the first frame (1), an annular airbag (39) coaxially fixed with the rotating roller (35), a circular airbag (40) communicating with the annular airbag (39), and a material guide plate (47) provided with a material guide chute (48); The 3D laser profiler (7) scans the adhesive backing of the spring couplets to form three-dimensional profile data, the two first industrial cameras (5) obtain adhesive backing thickness data from both sides, the second rotating shaft (24) engages with the rack (27) through the gear (26) to realize the directional winding of the protective film (23), the pressing block (31) presses the protective film (23) against the adhesive backing of the spring couplets under the action of the spring (32), the circular blade (30) cuts the protective film (23) along the edge of the spring couplets, the annular airbag (39) is inflated and clamps the spring couplets with the first conveyor belt (3), and after the spring couplets are turned over through the guide chute (48), they are inspected from the front by the second industrial camera (50).

2. The finished product visual inspection device of the self-adhesive spring festival couplets according to claim 1 is characterized in that: The winding roller assembly further comprises: A plurality of fixing rods (16) are vertically fixed to the bottom of the top plate (15), and the fixing rods (16) are slidably sleeved on the connecting frame (18); Four base plates (21) are fixed to the bottom of the connecting frame (18) in groups of two, and the first rotating shaft (19) and the second rotating shaft (24) are rotatably connected between the base plates (21) via damping bearings (22). A one-way bearing (25) is fixed to the second rotating shaft (24), and an outer ring of the one-way bearing (25) is fixed to a gear (26) meshing with a rack (27).

3. The finished product visual inspection device of the self-adhesive spring festival couplets according to claim 2 is characterized in that: The pasting structure further includes: The camera (33) is fixed to the bottom of the connecting frame (18) and faces the retracting area of the second rotating shaft (24); A limit baffle (28) is provided on the inner wall of the second U-shaped frame (13) and is used to limit the downward movement of the connecting frame (18); The support plate (34) horizontally penetrates the first conveyor belt (3), and the upper surface of the support plate (34) is coplanar with the cutting plane of the return blade (30).

4. The finished product visual inspection device of the self-adhesive spring festival couplets according to claim 1 is characterized in that: The flip structure also includes: The rubber wheels (36) are coaxially fixed to both ends of the rotating roller (35) and are in frictional contact with the first conveyor belt (3); A position sensor (43) is provided on the inner wall of the first frame (1) and is used to detect when the end of the spring couplet enters the clamping area between the rotating roller (35) and the first conveyor belt (3); The output end of the third electric push rod (42) is connected to the extrusion plate (41), and the extrusion plate (41) and the circular air bag (40) form an airtight cavity.

5. The finished product visual inspection device of the self-adhesive spring festival couplets according to claim 4 is characterized in that: The guide plate (47) is provided with: The exhaust chamber (53) is connected to the interior of the box (44) through the return air pipe (52); A plurality of exhaust holes (54) are provided along the side wall of the material guide chute (48) and are in communication with the exhaust cavity (53); Wherein, an arc-shaped plate (51) for diverting the airflow to the material guide chute (48) is provided in the box (44).

6. The finished product visual inspection device of the self-adhesive spring festival couplets according to claim 1 is characterized in that: Also includes: The connecting plate (8) horizontally connects the conveyor belts of the first frame (1) and the second frame (2); A first electric push rod (10) is vertically arranged on a mounting plate (9), and an output end of the first electric push rod (10) is connected to a push plate (11) that can cover the width of the conveyor belt; Wherein, a stopper (12) is provided at the bottom of the push plate (11) and is clearance-matched with the surface of the conveyor belt.

7. The finished product visual inspection device of the self-adhesive spring festival couplets according to claim 1 is characterized in that: The top of the U-shaped plate (49) is provided with: An LED light source, the illumination direction of which forms an angle of 45° with the optical axis of the second industrial camera (50); An image processing unit is connected to the second industrial camera (50) and is configured with a color comparison database.

8. The finished product visual inspection device of the self-adhesive spring festival couplets according to claim 1 is characterized in that: The scanning path of the 3D laser profiler (7) includes: A horizontal scanning line is provided along the conveying direction of the Spring Festival couplets; A vertical scanning matrix covering the width of the Spring Festival couplets; The scanned data is compared with the preset tolerance range (adhesive thickness ±5μm, dimensional accuracy ±1mm) in real time.

9. The finished product visual inspection device of the self-adhesive spring festival couplets according to claim 2, characterized in that: The cutting edge shape of the circular blade (30) is: The upper portion is provided with a guide inclined surface that is slidably matched with the pressing block (31); The lower part forms a contoured cutting edge that matches the edge contour of the spring couplets; The cutting pressure of the circular blade (30) is 20-35N / cm 2 .

10. A method for visually inspecting finished product adhesive-backed spring festival couplets, applied to the visually inspecting finished product adhesive-backed spring festival couplets according to claim 9, characterized in that: The following steps are involved: S1. Place the spring couplets coated with adhesive on the first conveyor belt (3) of the first frame (1). During the conveying process, two first industrial cameras (5) detect the thickness of the adhesive from both sides, and a 3D laser profiler (7) scans the spring couplets to detect the uniformity and size of the adhesive. Qualified products are conveyed to the second U-shaped frame (13) to be pasted with a protective film (23). Unqualified products are pushed by the first electric push rod (10) on the push plate (11) and moved to the first conveyor belt (3) of the second frame (2) via the connecting plate (8) for recycling and rework. S2, when the spring couplets move to the bottom of the pressing block (31), the first conveyor belt (3) is suspended, and the second electric push rod (14) pushes the top plate (15) and the connecting frame (18) downward, so that the protective film (23) fits the top of the spring couplets; when it continues to move downward, the top plate (15) pushes the fixed plate (29) and the return blade (30) downward through the fixed rod (16), the pressing block (31) presses the protective film (23), and the return blade (30) cuts along the edge of the spring couplets; after cutting, the connecting frame (18) and the top plate (15) move upward, and the second rotating shaft (24) rotates counterclockwise under the action of the gear (26) and the rack (27), and the cut protective film (23) is rolled up; S3. After the protective film (23) is pasted, the first conveyor belt (3) continues to convey the spring couplets to between the rotating roller (35) and the first conveyor belt (3), and one end of the spring couplets naturally droops. The fan (45) blows air through the exhaust pipe (46) to make the spring couplets further droop, which is convenient for clamping and conveying. The third electric push rod (42) is started to squeeze the circular air bag (40), and the annular air bag (39) expands and clamps the spring couplets with the first conveyor belt (3). The rubber wheel (36) and the first conveyor belt (3) rub against each other to drive the rotating roller (35) and the annular air bag (39) to rotate, completing the downward conveying. S4, when the spring couplets are transported downward, one end enters the guide chute (48), moves to the left under the guidance of the inclined surface and turns over, and after the front side is exposed, it moves to the second conveyor belt (4) of the first frame (1); when the fan (45) blows air, part of the wind force passes through the curved plate (51) and the return air duct (52) into the exhaust chamber (53), and is discharged from the exhaust hole (54), thereby assisting the spring couplets to turn over stably; S5, the second conveyor belt (4) conveys the turned-over spring couplets, and the second industrial camera (50) detects the font and color on the front side; qualified products continue to be conveyed, and unqualified products are pushed by the first electric push rod (10) and the push plate (11) to the second conveyor belt (4) of the second frame (2) for recycling and rework.

Images