Decorative paper printing defect visual detection device

Abstract

The utility model discloses a visual detection device for printing defects of decorative paper, which belongs to the field of detection devices and comprises a support frame and an arranged detection mechanism, a servo motor is started to drive an output end to drive a first screw rod to rotate through a first rotating rod, so that a connecting plate moves along a guide rod and the first screw rod through a guide hole and a first screw hole in the side wall, and then the detection mechanism is started to detect the printing defects of the decorative paper. According to the technical scheme, the industrial camera mounted in the mounting frame can be driven to transversely move, and the defects on the decorative paper passing through the lower part can be automatically detected in the moving process, and meanwhile, the rotating motor is started to drive the output end to drive the first gear to rotate; a first gear drives a second gear under meshing rotation, and after the second gear rotates on the top surface of a movable seat through a second rotating rod on the bottom surface, a second screw rod can move upwards along a second screw hole and drives a connecting plate to move upwards, so that the purpose of adjusting the use height of the industrial camera in the mounting frame is achieved; therefore, by adjusting the use height of the industrial camera, the shooting visual angle of the industrial camera can be expanded.

Description

Technical Field

[0001] This utility model relates to the field of detection devices, and in particular to a visual detection device for defects in decorative paper printing. Background Technology

[0002] Decorative paper printing refers to the process of directly printing patterns and text onto decorative paper base paper. It is mainly used for making various packaging boxes, paper bags, gift packaging, and materials for home and architectural decoration. In this process, printing plates on a printing press are used to apply pressure to print ink onto the decorative paper base paper, forming the desired patterns and text. Common decorative paper printing methods include flexographic printing, letterpress printing, gravure printing, and offset printing, each with different characteristics and applications to meet the printing needs of various decorative paper products.

[0003] In the prior art, a Chinese utility model patent with publication number "CN220104903U" and patent name "Visual Detection Device for Printing Defects of Letterpress Printing Machine" discloses a detection device. The patent describes a technical solution including: "a base, two vertical plates installed on the upper end of the base, a connecting block installed in the middle of each of the two vertical plates, a connecting shell installed on the side wall of each of the two connecting blocks, a threaded rod rotatably connected to the middle of each of the two connecting shells, a threaded block threadedly connected to the outside of each of the two threaded rods, a push rod installed on both sides of each of the two threaded blocks, and a positioning block installed on one end of each of the multiple push rods passing through the connecting shell and extending to the outside."

[0004] However, in actual use, although the first electric rod drives the industrial camera to move and detect defects on printed materials during the movement, the production line has various sizes of decorative paper, and the fixed height of the industrial camera results in a relatively fixed shooting angle. This means that the fixed-height industrial camera may not be able to meet the detection needs of all sizes. When a wide piece of decorative paper passes under the industrial camera, the difference in height or width means that the defects on the decorative paper cannot be completely covered or detected by the shooting angle of the industrial camera. This not only reduces the practicality and flexibility of the industrial camera, but also reduces the comprehensiveness and accuracy of the detection of defects in the decorative paper.

[0005] Therefore, in order to solve the above-mentioned technical problems, this utility model proposes a visual inspection device for defects in decorative paper printing. Utility Model Content

[0006] The main objective of this invention is to provide a visual inspection device for defects in decorative paper printing, which can effectively solve the problems in the background art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] A visual inspection device for printing defects in decorative paper includes a support frame. The support frame houses an inspection mechanism, which comprises a movable plate, a first screw, a servo motor, a mounting frame, an industrial camera, a second screw, a movable seat, a mounting seat, a rotary motor, a first gear, and a second gear. The two movable plates are fixedly connected together by a set of symmetrical guide rods. The movable plates are also movably connected to T-shaped guide strips on the inner side walls of the support frame via T-shaped guide grooves on their outer side walls. The first screw is movably connected between the movable plates via first rotating rods at both ends. The output end of the servo motor is connected to the second screw... A rotating rod is fixedly connected. The mounting frame is movably connected to the first screw via a connecting plate on the top surface. The industrial camera is fixedly connected inside the mounting frame. The movable seat is movably connected to the top surface of the support frame via slide bars on both sides. The second gear is movably connected to the top surface of the movable seat via a second rotating rod on the bottom surface. The second screw is fixedly connected to the top surface of the connecting plate and movably connected to the second rotating rod. The mounting seat is fixedly connected to the rear wall of one of the slide bars. The rotary motor is fixedly connected to the bottom surface of the mounting seat. The first gear is fixedly connected to the output end of the rotary motor and meshes with the second gear.

[0009] As a preferred embodiment of this utility model, a vertical opening is provided on the left side wall of the support frame, and a horizontal opening is provided on the top surface of the support frame. Sliding openings are provided on the front and rear side walls inside the horizontal opening, and a set of symmetrical T-shaped guide bars are fixedly installed on the left and right side walls inside the support frame.

[0010] As a preferred embodiment of this utility model, a rotation hole is also provided on the side wall of the movable plate.

[0011] As a preferred embodiment of this utility model, the first rotating rod is movably installed in the rotating hole, the servo motor is fixedly installed on the outer side wall of the left movable plate, and the output end of the servo motor is fixedly installed together with the first rotating rod on the left end. A connecting plate is fixedly installed on the top surface of the mounting frame, and a set of symmetrical guide holes are opened on the side wall of the connecting plate and movably installed together with the guide rod through the guide holes. A first screw hole is also opened on the side wall of the connecting plate between the guide holes, and the connecting plate is threadedly connected to the first screw through the first screw hole. The industrial camera is fixedly installed on the inner bottom surface of the mounting frame.

[0012] As a preferred technical solution of this utility model, the front and rear sides of the movable seat are respectively fixedly installed with slide bars, and the slide bars are movably installed in the slide opening. The top surface of the movable seat is provided with a mounting hole, and a bearing is fixedly installed in the mounting hole. A mounting seat is also fixedly installed on the rear wall of the slide bar.

[0013] As a preferred embodiment of this utility model, the rotary motor is fixedly installed on the bottom surface of the mounting base, and a first gear is fixedly installed on the output end of the rotary motor. A second rotating rod is fixedly installed on the bottom surface of the second gear, and the second rotating rod is inserted and fixedly installed together with the bearing. A second screw hole is opened on the bottom surface of the second rotating rod, and a through hole communicating with the second screw hole is opened on the top surface of the second gear. The second gear and the first gear mesh together. The second screw is fixedly installed on the top surface of the connecting plate and threadedly connected to the second screw hole.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] In this invention, the detection mechanism, when activated, drives the first screw to rotate via the first rotating rod. This causes the connecting plate to move along the guide rod and the first screw through the guide hole and the first screw hole on the side wall. This movement allows the industrial camera mounted in the mounting frame to move laterally, automatically detecting defects on the decorative paper passing below. Simultaneously, the rotary motor drives the first gear to rotate. This first gear, in its meshing rotation, drives the second gear. The second gear, via the second rotating rod on the bottom surface, rotates on the top surface of the movable seat, causing the second screw to move upwards along the second screw hole, thus moving the connecting plate upwards. This adjusts the operating height of the industrial camera within the mounting frame. By adjusting the operating height, the shooting angle of the industrial camera can be expanded, ensuring that the decorative paper is completely encompassed within the camera's field of view. This avoids the problem of defects on the decorative paper not being fully covered or detected, adapting to the detection needs of decorative paper of different specifications. This not only improves the practicality and flexibility of the industrial camera but also enhances the comprehensiveness and accuracy of decorative paper defect detection. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the overall structure of the support frame of this utility model;

[0018] Figure 3 This is a structural breakdown diagram of the testing mechanism of this utility model;

[0019] Figure 4 For the present utility model Figure 3 A schematic diagram of the structural breakdown at point A;

[0020] Figure 5 This is a cross-sectional schematic diagram of the second gear of this utility model.

[0021] In the diagram: 1. Support frame; 2. Detection mechanism; 3. Vertical opening; 4. Horizontal opening; 5. Sliding opening; 6. T-shaped guide bar; 7. Movable plate; 8. T-shaped guide groove; 9. Rotating hole; 10. Guide rod; 11. First screw; 12. First rotating rod; 13. Servo motor; 14. Mounting frame; 15. Connecting plate; 16. Guide hole; 17. First screw hole; 18. Industrial camera; 19. Second screw; 20. Movable seat; 21. Sliding bar; 22. Mounting hole; 23. Bearing; 24. Mounting seat; 25. Rotary motor; 26. First gear; 27. Second gear; 28. Second rotating rod; 29. ​​Second screw hole; 30. Through hole. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0023] like Figure 1 - Figure 5 As shown, a visual inspection device for defects in decorative paper printing includes a support frame 1. A detection mechanism 2 is installed within the support frame 1. The detection mechanism 2 includes movable plates 7, a first screw 11, a servo motor 13, a mounting frame 14, an industrial camera 18, a second screw 19, a movable seat 20, a mounting seat 24, a rotary motor 25, a first gear 26, and a second gear 27. The two movable plates 7 are fixedly connected together by a set of symmetrical guide rods 10. The movable plates 7 are also movably connected to T-shaped guide strips 6 on the inner side walls of the support frame 1 via T-shaped guide grooves 8 on their outer side walls. The first screw 11 is movably connected between the movable plates 7 via first rotating rods 12 at both ends. The output end of the servo motor 13... The first rotating rod 12 is fixedly connected to the first rotating rod 12. The mounting frame 14 is movably connected to the first screw 11 through the connecting plate 15 on the top surface. The industrial camera 18 is fixedly connected inside the mounting frame 14. The movable seat 20 is movably connected to the top surface of the support frame 1 through the slide bars 21 on both sides. The second gear 27 is movably connected to the top surface of the movable seat 20 through the second rotating rod 28 on the bottom surface. The second screw 19 is fixedly connected to the top surface of the connecting plate 15 and movably connected to the second rotating rod 28. The mounting seat 24 is fixedly connected to the rear wall of one of the slide bars 21. The rotary motor 25 is fixedly connected to the bottom surface of the mounting seat 24. The first gear 26 is fixedly connected to the output end of the rotary motor 25 and meshes with the second gear 27.

[0024] like Figure 2As shown, a vertical opening 3 is provided on the left side wall of the support frame 1. The vertical opening 3 ensures that the servo motor 13 is not obstructed when moving. A horizontal opening 4 is provided on the top surface of the support frame 1. The horizontal opening 4 is used to cooperate with the movable seat 20 to realize the horizontal movement operation. Sliding openings 5 ​​are provided on the front and rear side walls inside the horizontal opening 4. The sliding openings 5 ​​are used to cooperate with the slider 21 to realize the sliding operation. A set of symmetrical T-shaped guide bars 6 are fixedly installed on the left and right side walls inside the support frame 1. The T-shaped guide bars 6 are used to cooperate with the movable plate 7 to realize the guiding movement operation.

[0025] like Figure 3 As shown, the movable plate 7 is provided with a set of symmetrical left and right sides, and a set of symmetrical guide rods 10 are fixedly installed between the symmetrical movable plates 7. The transverse opening 4 is used to guide the movement of the connecting plate 15. A set of symmetrical T-shaped guide grooves 8 are provided on the outer side wall of the movable plate 7, and the movable plate 7 is movably installed together with the T-shaped guide bar 6 through the T-shaped guide grooves 8. The movable plate 7 can move along the T-shaped guide bar 6 through the T-shaped guide grooves 8. A rotating hole 9 is also provided on the side wall of the movable plate 7. The rotating hole 9 is used to cooperate with the first rotating rod 12 to realize the rotation operation.

[0026] like Figure 3 As shown, first rotating rods 12 are fixedly installed at the left and right ends of the first screw 11, and the first rotating rods 12 are movably installed in the rotating holes 9. The servo motor 13 is fixedly installed on the outer side wall of the left movable plate 7, and the output end of the servo motor 13 is fixedly installed together with the first rotating rod 12 at the left end. A connecting plate 15 is fixedly installed on the top surface of the mounting frame 14, and a set of symmetrical guide holes 16 are opened on the side wall of the connecting plate 15. The connecting plate 15 is movably installed together with the guide rod 10 through the guide holes 16. A first rotating rod 12 is also opened on the side wall of the connecting plate 15 between the guide holes 16. The connecting plate 15 is threadedly connected to the first screw 11 through the first screw hole 17. The industrial camera 18 is fixedly installed on the inner bottom surface of the mounting frame 14. After the servo motor 13 is turned on, the first rotating rod 12 is driven to rotate in the rotating hole 9. The first rotating rod 12 can drive the first screw 11 to rotate, so that the connecting plate 15 drives the industrial camera 18 installed in the top mounting frame 14 to move laterally through the guide hole 16 and the first screw hole 17 along the guide rod 10 and the first screw 11, so as to detect defects on the decorative paper passing below during the movement.

[0027] like Figure 4As shown, slide bars 21 are fixedly installed on the front and rear sides of the movable seat 20, and slide bars 21 are movably installed in the slide opening 5. After the slide bars 21 slide in the slide opening 5, they can drive the movable seat 20 to move in the transverse opening 4. The top surface of the movable seat 20 is provided with a mounting hole 22, and a bearing 23 is fixedly installed in the mounting hole 22. The bearing 23 is used to cooperate with the second rotating rod 28 to realize the rotation operation. A mounting seat 24 is also fixedly installed on the rear wall of the rear slide bar 21. The mounting seat 24 is used to install and fix the rotary motor 25.

[0028] like Figure 4 and Figure 5 As shown, a rotary motor 25 is fixedly mounted on the bottom surface of the mounting base 24, and a first gear 26 is fixedly mounted on the output end of the rotary motor 25. A second rotating rod 28 is fixedly mounted on the bottom surface of the second gear 27, and the second rotating rod 28 is inserted and fixedly mounted together with the bearing 23. A second screw hole 29 is opened on the bottom surface of the second rotating rod 28, and a through hole 30 communicating with the second screw hole 29 is opened on the top surface of the second gear 27. The second gear 27 and the first gear 26 mesh together. A second screw 19 is fixedly mounted on the top surface of the connecting plate 15 and threadedly connected to the second screw hole 29. When the rotary motor 25 is turned on, the output end drives the first gear 26 to rotate. The first gear 26 will drive the second gear 27 to rotate under the action of meshing rotation. The second rotating rod 28 on the bottom surface of the second gear 27 will rotate in the bearing 23, so that the second screw 19 moves upward along the second screw hole 29 and passes through the through hole 30 to drive the connecting plate 15 to move upward, so as to achieve the purpose of adjusting the height of the industrial camera 18.

[0029] The specific operating principles of support frame 1 and detection mechanism 2 are as follows:

[0030] The height of the industrial camera 18 is pre-adjusted according to the specifications of the decorative paper to be tested, so that the decorative paper is completely within the shooting angle range of the industrial camera 18. The rotary motor 25 installed on the bottom surface of the mounting base 24 is turned on. The rotary motor 25 drives the output end to drive the first gear 26. The first gear 26 will drive the second gear 27 to rotate under the meshing rotation. The second rotating rod 28 installed on the bottom surface of the second gear 27 will rotate in the bearing 23 installed in the mounting hole 22 opened on the top surface of the movable base 20. When the second rotating rod 28 on the bottom surface of the second gear 27 rotates, because the second screw 19 is threadedly connected to the second screw hole 29 opened at the bottom end of the second rotating rod 28 and passes through the through hole 30 opened on the top surface of the second gear 27, the second... The second screw 19 will pass through the second screw hole 29 and the through hole 30, driving the connecting plate 15 to move upward or downward. The connecting plate 15 will drive the industrial camera 18 installed in the bottom mounting frame 14 to move synchronously. During the movement of the connecting plate 15, the movable plate 7 will slide along the T-shaped guide strips 6 installed on the inner two side walls of the support frame 1 through the T-shaped guide groove 8 opened on the outer wall. The servo motor 13 will move in the vertical opening 3 opened on the left side wall of the support frame 1. After the industrial camera 18 is adjusted to a suitable height position, the servo motor 13 installed on the outer side wall of the left movable plate 7 will be turned on. The servo motor 13 will drive the output end to drive the first rotating rod 12 to rotate in the rotating hole 9 opened on the side wall of the movable plate 7. The first rotating rod 12 will drive the second rotating rod 18 to rotate in the vertical opening 9 opened on the side wall of the movable plate 7. A screw 11 rotates, and the connecting plate 15 moves laterally along the guide rod 10 and the first screw 11 through the guide hole 16 and the first screw hole 17 on its side wall. This causes the industrial camera 18, mounted in the mounting frame 14 on the bottom surface of the connecting plate 15, to move synchronously. During the movement, the industrial camera 18 detects defects on the decorative paper passing below. The industrial camera 18 is mainly based on its high-resolution image acquisition capability and advanced image processing technology. The industrial camera can capture images on the decorative paper and improve image quality through preprocessing operations such as image enhancement, smoothing, and edge sharpening. It then extracts features from the image, such as edges, shapes, and colors, and compares and analyzes these features with preset standards or templates. In this way, the industrial camera can... It can accurately detect various printing defects such as image blurring, color deviation, image distortion, and ink spot defects, thereby ensuring the product quality of decorative paper. Simultaneously, during its movement, the connecting plate 15 drives the movable seat 20 to move synchronously within the transverse opening 4 on the top surface of the support frame 1 via the second screw 19. The sliding strips 21 installed on both sides of the movable seat 20 slide within the sliding opening 5, ensuring that the operating height of the industrial camera 18 can be adjusted at any time. By adjusting the operating height of the industrial camera 18, the shooting angle of the industrial camera 18 can be expanded, ensuring that the decorative paper is fully visible within the shooting angle of the industrial camera 18. This avoids the problem of defects on the decorative paper not being completely covered or detected, thus adapting to the inspection needs of decorative paper of different specifications.This not only improves the practicality and flexibility of the industrial camera 18, but also enhances the comprehensiveness and accuracy of defect detection in decorative paper.

[0031] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0032] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A visual inspection device for printing defects in decorative paper, comprising a support frame (1), characterized in that: The support frame (1) has a detection mechanism (2) inside, and the detection mechanism (2) includes a movable plate (7), a first screw (11), a servo motor (13), a mounting frame (14), an industrial camera (18), a second screw (19), a movable seat (20), a mounting seat (24), a rotary motor (25), a first gear (26), and a second gear (27). The two movable plates (7) are fixedly connected together by a set of symmetrical guide rods (10), and the movable plates (7) are also movably connected to the T-shaped guide strips (6) on the inner two side walls of the support frame (1) through the T-shaped guide grooves (8) on the outer side wall. The first screw (11) is movably connected between the movable plates (7) through the first rotating rods (12) at both ends, and the output end of the servo motor (13) is fixedly connected to the first rotating rod (12). Next, the mounting frame (14) is movably connected to the first screw (11) through the connecting plate (15) on the top surface, and the industrial camera (18) is fixedly connected inside the mounting frame (14). The movable seat (20) is movably connected to the top surface of the support frame (1) through the slide bars (21) on both sides, and the second gear (27) is movably connected to the top surface of the movable seat (20) through the second rotating rod (28) on the bottom surface. The second screw (19) is fixedly connected to the top surface of the connecting plate (15) and movably connected to the second rotating rod (28). The mounting seat (24) is fixedly connected to the rear wall of one of the slide bars (21), and the rotary motor (25) is fixedly connected to the bottom surface of the mounting seat (24). The first gear (26) is fixedly connected to the output end of the rotary motor (25) and meshes with the second gear (27).

2. The visual inspection device for printing defects in decorative paper according to claim 1, characterized in that: A vertical opening (3) is provided on the left side wall of the support frame (1), and a horizontal opening (4) is provided on the top surface of the support frame (1). Sliding openings (5) are provided on the front and rear side walls inside the horizontal opening (4). A set of symmetrical T-shaped guide bars (6) are fixedly installed on the left and right side walls inside the support frame (1).

3. The visual inspection device for printing defects in decorative paper according to claim 2, characterized in that: The movable plate (7) also has a rotating hole (9) on its side wall.

4. The visual inspection device for printing defects in decorative paper according to claim 3, characterized in that: The first rotating rod (12) is movably installed in the rotating hole (9). The servo motor (13) is fixedly installed on the outer side wall of the left movable plate (7), and the output end of the servo motor (13) is fixedly installed together with the first rotating rod (12) on the left. The top surface of the mounting frame (14) is fixedly installed with a connecting plate (15), and a set of symmetrical guide holes (16) are opened on the side wall of the connecting plate (15) and movably installed together with the guide rod (10) through the guide holes (16). The side wall of the connecting plate (15) and the guide holes (16) are also provided with a first screw hole (17), and the connecting plate (15) is threadedly connected to the first screw (11) through the first screw hole (17). The industrial camera (18) is fixedly installed on the inner bottom surface of the mounting frame (14).

5. The visual inspection device for printing defects in decorative paper according to claim 4, characterized in that: The movable seat (20) is fixedly installed with slide bars (21) on the front and rear sides respectively, and the slide bars (21) are movably installed in the slide opening (5). The top surface of the movable seat (20) is provided with a mounting hole (22), and a bearing (23) is fixedly installed in the mounting hole (22). A mounting seat (24) is also fixedly installed on the rear wall of the slide bar (21) on the rear side.

6. The visual inspection device for printing defects in decorative paper according to claim 5, characterized in that: The rotary motor (25) is fixedly installed on the bottom surface of the mounting base (24), and the output end of the rotary motor (25) is fixedly installed with a first gear (26). The bottom surface of the second gear (27) is fixedly installed with a second rotating rod (28), and the second rotating rod (28) is inserted and fixedly installed with the bearing (23). The bottom surface of the second rotating rod (28) is provided with a second screw hole (29), and the top surface of the second gear (27) is provided with a through hole (30) communicating with the second screw hole (29). The second gear (27) and the first gear (26) mesh together. The second screw (19) is fixedly installed on the top surface of the connecting plate (15) and threadedly connected to the second screw hole (29).

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