Printed on-line color detection device

Abstract

The utility model belongs to the field of printing production line equipment, propose a kind of printing online color detection device, including body, conveying device and wall lamp, the both sides of conveying device are provided with rack, be provided with lift adjustment cylinder on rack, the telescopic end of lift adjustment cylinder is downward and is provided with first industrial camera, the both sides of rack are provided with two second industrial cameras, the installation side of second industrial camera is provided with adjusting device, adjusting device includes horizontal adjusting mechanism, horizontal adjusting mechanism is set on pitch adjusting mechanism, the power input end of pitch adjusting mechanism is provided with pitch adjusting cylinder, the top of pitch adjusting cylinder is provided with the hinged seat connected with rack. The utility model adjusts the staggered angle of second industrial camera and first industrial camera by horizontal adjusting mechanism, adjusts the pitch angle of second industrial camera by pitch adjusting mechanism, it is favorable to improve the collection performance of first industrial camera and second industrial camera in image acquisition link.

Description

Technical Field

[0001] This utility model belongs to the field of printing production line equipment and relates to an online color detection device for printing. Background Technology

[0002] Printing quality inspection encompasses four core aspects: appearance defects, color and tone, registration accuracy, and physical properties, ensuring that printed materials meet design standards and usage requirements. Among these, online color inspection is primarily achieved through machine vision technology, spectrophotometry, and other methods, combined with advanced algorithms and control systems.

[0003] Online color inspection of printed materials typically requires the installation of image acquisition units (industrial cameras) and lighting units in multiple locations, as illustrated in Chinese invention patent CN202210170834.1, which discloses an inspection device for detecting the printing quality of printed paper products. However, while industrial cameras positioned directly above the conveyor generally have multi-height adjustment capabilities, those arranged to the side often lack tilt angle adjustment, which hinders the accuracy of image acquisition. Utility Model Content

[0004] This invention addresses the technical problems existing in the aforementioned printing inspection equipment by proposing a reasonably designed online color inspection device for printing that allows for camera tilt angle adjustment and improves image acquisition efficiency.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: The online color detection device for printing provided by this utility model includes a machine body. The machine body is equipped with a conveying device and wall lamps distributed on the inner wall of the machine body. The conveying device is equipped with frames on both sides. The frames are equipped with lifting and adjusting cylinders. The telescopic end of the lifting and adjusting cylinder faces downward and is equipped with a first industrial camera. Two second industrial cameras are equipped with the two sides of the frame. The mounting side of the second industrial cameras is equipped with an adjusting device. The adjusting device includes a horizontal adjusting mechanism. The horizontal adjusting mechanism is mounted on a pitch adjusting mechanism. The power input end of the pitch adjusting mechanism is equipped with a pitch adjusting cylinder. The top of the pitch adjusting cylinder is equipped with a hinge seat connected to the frame.

[0006] Preferably, the horizontal adjustment mechanism includes a rectangular mounting groove, the inner wall of which is used to mate with a second industrial camera. Two connecting arms are provided on the side of the mounting groove. The connecting arms are provided with guide holes, and guide screws are provided in the guide holes. Adjusting sleeves are provided on the guide screws between the two connecting arms. Two connecting plates are provided on the guide screws on both sides of the pitch adjustment mechanism. The connecting plates are connected to the pitch adjustment mechanism by screws. Locking nuts are provided at the ends of the guide screws.

[0007] Preferably, the pitch adjustment mechanism includes a mounting plate, the mounting plate includes a U-shaped section, the two ends of the U-shaped section are provided with two symmetrical loop sections about the side of the frame, the bottom of the loop section is provided with a rotary arm, the center of the rotary arm is provided with a rotary shaft connected to the frame, and the top of the loop section is provided with a hinge rod, the hinge rod is connected to the telescopic end of the pitch adjustment cylinder.

[0008] Preferably, the U-shaped segment is provided with a guide port that slides with the connecting arm.

[0009] Preferably, the conveying device includes two oppositely distributed conveyor belts, with multiple idlers spaced apart along the length of the conveyor belts at the bottom, a drive roller on the inner side of the conveyor belts, support plates at both ends of the drive rollers, and a drive motor connected to the drive rollers on the outer side of the support plates.

[0010] Preferably, an upper support plate and a lower support plate are provided between the conveyor belts, and a vertical support shaft is provided between the upper support plate and the lower support plate. A lighting hole is provided on the upper support plate near the first industrial camera, and a flat light box connected to the lower support plate is provided below the lighting hole.

[0011] Compared with the prior art, the advantages and positive effects of this utility model are as follows: The online color detection device for printing provided by this utility model has a horizontal adjustment mechanism that can adjust the staggered angle between the second and first industrial cameras, and a tilt adjustment mechanism that can adjust the tilt angle of the second industrial camera, which is beneficial to improving the image acquisition performance of the first and second industrial cameras. This utility model is reasonably designed, can adjust the tilt angle of the cameras, and is conducive to improving image acquisition efficiency, making it suitable for large-scale promotion. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 A perspective view of the online color detection device for printing provided in the embodiment; Figure 2 A top view of the online color detection device for printing provided in the embodiment; Figure 3 A side view of the online color detection device for printing provided in the embodiment; Figure 4 for Figure 3 A magnified schematic diagram of the online color detection device for printing at point A; Figure 5 A three-dimensional view of the first and second industrial cameras on the frame; Figure 6 for Figure 5 Enlarged view of point B in the middle; Figure 7 The front view of the first and second industrial cameras on the frame; In the above figures: 1. Machine body; 2. Conveying device; 21. Conveyor belt; 22. Idler roller; 23. Transmission roller; 24. Support plate; 25. Drive motor; 3. Wall lamp; 4. Frame; 5. Lifting and adjusting cylinder; 6. First industrial camera; 7. Second industrial camera; 8. Adjusting device; 81. Horizontal adjustment mechanism; 811. Mounting slot; 812. Connecting arm; 813. Guide screw; 814. Adjusting screw sleeve; 815. Connecting plate; 816. Locking nut; 82. Pitch adjustment mechanism; 821. Mounting plate; 8211. U-shaped section; 8212. Recurved section; 822. Hinge rod; 823. Guide opening; 824. Rotating arm; 825. Rotating shaft; 83. Pitch adjustment cylinder; 84. Hinge seat; 9. Upper support plate; 91. Lighting hole; 10. Lower support plate; 11. Support shaft; 12. Flat light box. Detailed Implementation

[0014] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0015] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0016] Examples, such as Figures 1-7As shown, the online color detection device for printing provided by this utility model includes a body 1. Inside the body 1, there is a conveying device 2 and wall lamps 3 distributed on the inner wall of the body 1. On both sides of the conveying device 2, there are frames 4. On the frames 4, there are lifting and adjusting cylinders 5. The telescopic end of the lifting and adjusting cylinder 5 faces downward and is equipped with a first industrial camera 6. On both sides of the frames 4, there are two second industrial cameras 7. On the mounting side of the second industrial cameras 7, there is an adjusting device 8. The adjusting device 8 includes a horizontal adjusting mechanism 81. The horizontal adjusting mechanism 81 is mounted on a pitch adjusting mechanism 82. The power input end of the pitch adjusting mechanism 82 is equipped with a pitch adjusting cylinder 83. The top of the pitch adjusting cylinder 83 is equipped with a hinge seat 84 connected to the frame 4.

[0017] Specifically, the machine body 1 has inlets and outlets on both sides for connecting with the preceding and following equipment, allowing printed products to enter and exit; the conveyor device 2 is a belt conveyor; the frame 4 is a gate-shaped frame system made of square tubes welded or screwed together, providing a mounting base for the lifting adjustment cylinder 5 and the pitch adjustment mechanism 82; the wall lamp 3 is a rectangular light box, fixed inside the machine body 1 with screws, providing a reasonable lighting range for the image acquisition stage; the lifting adjustment cylinder 5 adjusts the real-time height of the first industrial camera 6 through lifting action, and the first industrial camera 6 acquires images of the passing printed products from above the conveyor device 2; for the second industrial camera 7, the horizontal adjustment mechanism 81 can adjust the staggered angle between the second industrial camera 7 and the first industrial camera 6, and the pitch adjustment mechanism 82 can adjust the pitch angle of the second industrial camera 7, thereby ensuring that the first industrial camera 6 and the second industrial camera 7 have a large image acquisition range and an acquisition angle that meets the requirements for image transmission, which is beneficial to improving the acquisition performance of the first industrial camera 6 and the second industrial camera 7 in the image acquisition stage.

[0018] To improve the adjustment performance of the horizontal adjustment mechanism 81, the horizontal adjustment mechanism 81 provided by this utility model includes a rectangular mounting groove 811. The inner wall of the mounting groove 811 is used to cooperate with the second industrial camera 7. Two connecting arms 812 are provided on the side of the mounting groove 811. A guide hole is provided on the connecting arm 812. A guide screw 813 is provided in the guide hole. An adjusting sleeve 814 located between the two connecting arms 812 is provided on the guide screw 813. Two connecting plates 815 distributed on both sides of the pitch adjustment mechanism 82 are provided on the guide screw 813. The connecting plates 815 are connected to the pitch adjustment mechanism 82 by screws. A locking nut 816 is provided at the end of the guide screw 813. The connecting plate 815, after connecting to the pitch adjustment mechanism 82, provides a relatively fixed support shaft hole for the guide screw 813. The connecting arm 812, connected to the guide screw 813, can move linearly inside the pitch adjustment mechanism 82. The specific position of the connecting arm 812 on the guide screw 813 is controlled by the threaded engagement of the adjusting sleeve 814 and the guide screw 813, preventing the connecting arm 812 from slipping automatically. In this way, the adjusting sleeve 814 can adjust the specific position of the mounting groove 811 and the second industrial camera 7, forming a corresponding staggered angle with the first industrial camera 6 in the conveying direction of the conveying device 2, thereby improving the efficiency of image acquisition within the equipment.

[0019] To improve the adjustment efficiency of the pitch adjustment mechanism 82, the pitch adjustment mechanism 82 provided by this utility model includes a mounting plate 821. The mounting plate 821 includes a U-shaped section 8211. Two symmetrical loop sections 8212 about the side of the frame 4 are provided at both ends of the U-shaped section 8211. A rotary arm 824 is provided at the bottom of the loop section 8212. A rotary shaft 825 connected to the frame 4 is provided at the center of the rotary arm 824. A hinge rod 822 is provided at the top of the loop section 8212. The hinge rod 822 is connected to the telescopic end of the pitch adjustment cylinder 83. The slewing arm 824 includes an ear plate integrated with the mounting plate 821. The ear plate has multiple flange holes, and a T-shaped connecting sleeve is provided on the outer side of the ear plate. The T-shaped connecting sleeve is threadedly connected to the slewing shaft 825, primarily to prevent horizontal movement of the mounting plate 821 without affecting its rotation around the slewing shaft 825. Two U-shaped sections 8212 of the mounting plate 821 are used from both sides of the frame 4 to clamp onto the sides of the frame 4, and cooperate with the U-shaped section 8211 to provide space for the installation of the horizontal adjustment mechanism 81. The space also provides ample wiring space for the rear end of the second industrial camera 7, ensuring the electrical connection requirements of the second industrial camera 7; the hinge rod 822 is hinged to the pitch adjustment cylinder 83 and the hinge center is intersected with the rotation center of the rotary arm 824, which helps to avoid jamming during the extension and retraction of the pitch adjustment cylinder 83; the pitch adjustment cylinder 83 can drive the mounting plate 821, together with the horizontal adjustment mechanism 81 and the second industrial camera 7, to generate a pitch angle on the inner side of the frame 4 through the extension and retraction action, thereby obtaining the corresponding image acquisition angle.

[0020] Furthermore, the U-shaped segment 8211 is provided with a guide port 823 that slides with the connecting arm 812. The guide port 823 not only provides a linear movement aperture for the connecting arm 812, but also provides an anti-overturning support surface for the connecting arm 812, which is beneficial to improving the stability and reliability of the second industrial camera 7 on the mounting slot 811.

[0021] The conveying device 2 provided by this utility model includes two relatively distributed conveyor belts 21. Multiple idlers 22, spaced apart along the length of each conveyor belt 21, are arranged at the bottom of each conveyor belt 21. A drive roller 23 is arranged on the inner side of each conveyor belt 21, and support plates 24 are arranged at both ends of each drive roller 23. A drive motor 25, which is connected to the drive roller 23, is arranged on the outer side of the support plate 24. The drive motor 25, by inputting power to the drive roller 23, can drive the two conveyor belts 21 to produce continuous rotational motion. The idlers 22 support the lower surface of the conveyor belts 21, providing a certain tension. The transmission surface between the conveyor belts 21 and the drive rollers 23 can be achieved through friction transmission or through tooth meshing transmission; using tooth meshing transmission can achieve higher transmission accuracy.

[0022] To improve image acquisition quality, this invention includes auxiliary lighting facilities within the image acquisition range that can be placed under the printed product. The printed product will not detach from the conveyor belt 21 during continuous transport. An upper support plate 9 and a lower support plate 10 are provided between the conveyor belts 21, with a vertical support shaft 11 between them. A lighting hole 91 is provided on the upper support plate 9 near the first industrial camera 6, and a flat light box 12 connected to the lower support plate 10 is located below the lighting hole 91. The top surface of the upper support plate 9 is smoothed to ensure efficient horizontal transport of the printed product due to friction from the conveyor belt 21. The lighting hole 91 on the upper support plate 9 is used to install the flat light box 12, which is connected to a power source from the bottom of the lower support plate 10 via wires. The flat light box 12 illuminates the printed product from the bottom, which is beneficial for improving the overall image acquisition quality of transparent printed products. It should be noted that for the conveyor belt 21 and drive roller 23 using toothed meshing drive, the unit width of the tooth meshing avoids the position where the upper and lower support plates can contact the conveyor belt 21, thereby ensuring that the conveyor belt 21 and drive belt can achieve effective transmission and continuous conveying of printed products.

[0023] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A printing online color detection device, comprising a body, wherein a conveying device and wall lights distributed on the inner wall of the body are arranged inside the body, and frames are arranged on both sides of the conveying device, wherein lifting and adjusting cylinders are arranged on the frames, and the telescopic end of the lifting and adjusting cylinder faces downward and is equipped with a first industrial camera, characterized in that, Two second industrial cameras are arranged on both sides of the frame. An adjustment device is provided on the mounting side of the second industrial camera. The adjustment device includes a horizontal adjustment mechanism, which is set on the pitch adjustment mechanism. A pitch adjustment cylinder is provided at the power input end of the pitch adjustment mechanism, and a hinge seat connected to the frame is provided at the top of the pitch adjustment cylinder.

2. The online color detection device for printing according to claim 1, characterized in that, The horizontal adjustment mechanism includes a rectangular mounting groove. The inner wall of the mounting groove is used to mate with a second industrial camera. Two connecting arms are provided on the side of the mounting groove. The connecting arms are provided with guide holes. A guide screw is provided in the guide holes. An adjusting sleeve is provided on the guide screw between the two connecting arms. Two connecting plates are provided on the guide screw on both sides of the pitch adjustment mechanism. The connecting plates are connected to the pitch adjustment mechanism by screws. A locking nut is provided at the end of the guide screw.

3. The online color detection device for printing according to claim 2, characterized in that, The pitch adjustment mechanism includes a mounting plate, which includes a U-shaped section. Two symmetrical loop sections are provided at both ends of the U-shaped section about the side of the frame. A rotary arm is provided at the bottom of the loop section. A rotary shaft connected to the frame is provided at the center of the rotary arm. A hinge rod is provided at the top of the loop section. The hinge rod is connected to the telescopic end of the pitch adjustment cylinder.

4. The online color detection device for printing according to claim 3, characterized in that, The U-shaped segment is provided with a guide port that slides with the connecting arm.

5. The online color detection device for printing according to claim 1 or 4, characterized in that, The conveying device includes two oppositely distributed conveyor belts. Multiple idlers are provided at the bottom of the conveyor belts and spaced apart along the length of the conveyor belts. A drive roller is provided on the inner side of the conveyor belts. Support plates are provided at both ends of the drive rollers. A drive motor that is connected to the drive rollers is provided on the outer side of the support plates.

6. The online color detection device for printing according to claim 5, characterized in that, An upper support plate and a lower support plate are provided between the conveyor belts. A vertical support shaft is provided between the upper support plate and the lower support plate. A lighting hole is provided on the upper support plate near the first industrial camera. A flat light box connected to the lower support plate is provided below the lighting hole.

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