Visual detection device and detection method for packaging and decorating printed matters

Abstract

The invention relates to the technical field of printed matter detection, in particular to a packaging decoration printed matter visual detection device and method.The packaging decoration printed matter visual detection device comprises a machining table and a guide rail, a hydraulic telescopic rod is fixedly installed on the guide rail, and a visual detector body is fixedly installed at the output end of the hydraulic telescopic rod; a precise positioning structure is arranged on the machining table and comprises a supporting table fixedly installed at the top of the machining table, fixing plates are fixedly installed on the periphery of the supporting table, screws are movably installed on the fixing plates, and a positioning plate is movably installed at one end of each screw. Through the arrangement of the precise positioning structure, under the limitation of a plurality of positioning plates in the precise positioning structure, a printed matter to be detected can be precisely positioned and placed on a processing table, namely under the visual detector body, so that the printed matter is effectively prevented from deviating during placement; the detection effect of the visual detector body on the printed matter is improved, and the manufacturing quality of the printed matter is improved.

Description

Technical Field

[0001] The invention relates to a visual inspection device for packaging and decoration printed matter, in particular to a visual inspection device and inspection method for packaging and decoration printed matter, belonging to the technical field of printed matter inspection. Background Art

[0002] Package printing is the printing with various packaging materials as carriers, and printing decorative patterns, designs or words on the packaging to make the product more attractive or more descriptive, so as to convey information and increase sales. It includes the printing of packaging cartons, packaging bottles, packaging cans, etc. Package printing occupies a large proportion in the printing industry and the packaging industry, and is an indispensable part of the packaging project. There are letterpress printing, flat printing, gravure printing, screen printing, orifice printing and other printing methods. The main elements of printing are paper, ink, color, etc. Package printing needs to take into account issues such as economy and environmental protection, and at the same time, it needs to be able to fully and well express the information to be printed.

[0003] Visual inspection is to use machines instead of human eyes to make measurements and judgments. Visual inspection refers to converting the captured target into image signals through machine vision products, transmitting them to a dedicated image processing system, and converting them into digital signals based on pixel distribution, brightness, color and other information. The image system performs various operations on these signals to extract the characteristics of the target, and then controls the equipment action on site based on the results of the judgment. It is a valuable mechanism for production, assembly or packaging, and it has immeasurable value in detecting defects and preventing defective products from being delivered to consumers.

[0004] After the printed product is manufactured, it will be visually inspected to detect whether there are any printing defects on the printed product. However, during the inspection process, the commonly used visual inspection device often requires manual placement of the printed product on the device, and then manual and visual placement of the printed product under the visual inspection device. Therefore, the printed product cannot be accurately positioned, and slight deviations will affect the effect of visual inspection.

[0005] Therefore, there is an urgent need to improve a visual inspection device and inspection method for packaging and decoration printed matter to solve the above-mentioned problems. Summary of the invention

[0006] The purpose of the present invention is to provide a visual inspection device and method for packaging and decoration printed materials. Through the setting of a precise positioning structure, under the limitation of multiple positioning plates in the precise positioning structure, the printed materials to be inspected can be accurately positioned on the processing table, that is, directly below the visual inspection instrument body, thereby effectively preventing the placement of the printed materials from being offset, improving the inspection effect of the visual inspection instrument body on the printed materials, and improving the manufacturing quality of the printed materials.

[0007] In order to achieve the above object, the main technical solutions adopted by the present invention include:

[0008] A visual inspection device for packaging and decoration printed materials comprises a processing table and a guide rail, a hydraulic telescopic rod is fixedly mounted on the guide rail, a visual inspection instrument body is fixedly mounted on the output end of the hydraulic telescopic rod, a precise positioning structure is provided on the processing table, the precise positioning structure comprises a support table fixedly mounted on the top of the processing table, fixed plates are fixedly mounted on all four sides of the support table, a screw is movably mounted on the fixed plate, a positioning plate is movably mounted on one end of the screw, a sliding rod is fixedly mounted on the top of the positioning plate, a limit frame used in conjunction with the sliding rod is fixedly mounted on the top of the fixed plate, and a surface of the fixed plate is provided with marking lines.

[0009] Preferably, a support block connected by a plurality of first springs is provided on the limit frame, a magnetic block is fixedly mounted on one end of the support block that passes through the limit frame, and a magnetic plate is fixedly mounted on the top of the slide rod.

[0010] Preferably, a plurality of air holes are provided on the support platform, an air pump mounted on the processing platform is provided below the support platform, and a sealing frame connected to the support platform is fixedly mounted on the output end of the air pump.

[0011] Preferably, a fixing frame is provided on the visual inspection instrument body, and a fill light is fixedly mounted on the fixing frame.

[0012] Preferably, support frames are fixedly mounted on both sides of the fixing frame, a second spring is fixedly mounted inside the support frame, and a clamping rod movably arranged on the fixing frame is fixedly mounted on one end of the second spring.

[0013] Preferably, both sides of the visual inspection instrument body are provided with limiting grooves that engage with the clamping rod, and a pull rod is fixedly installed on the other end of the clamping rod. The pull rod passes through the second spring and extends to the outside of the support frame.

[0014] Preferably, a slide rail is fixedly mounted on the surface of the processing table, a slider is slidably mounted on the slide rail, a fixing rod is fixedly mounted on the top of the slider, and a display screen movably mounted via a bearing is provided on the fixing rod.

[0015] Preferably, a fixing frame is fixedly installed on both sides of the processing table, a collection box is arranged inside the fixing frame, and a label box is fixedly installed on the front side of the fixing frame.

[0016] Preferably, two fixing blocks are fixedly mounted on the surface of the fixing frame, bolts are movably mounted on the fixing blocks, a plurality of limiting blocks matched with the bolts are fixedly mounted on the collecting box, and a handle is fixedly mounted on the surface of the collecting box.

[0017] Preferably, a visual inspection device and method for packaging and decoration printed matter comprises the following steps:

[0018] S1. According to the size of the printed matter, rotate the screws around the support table so that the screws, the slide bar and the limit frame cooperate to drive the positioning plate to move, and adjust the position of the positioning plate according to the marking lines set on the surface of the support table until the space between the four positioning plates is adjusted to the same size as the printed matter;

[0019] S2. Then place the printed product on the support table, start the guide rail and the hydraulic telescopic rod to drive the visual inspection instrument to move and lift to perform visual inspection on the printed product. The inspected image is transmitted to the display screen for display. The staff can pull the display screen to slide on the slide rail to change the position, so as to facilitate viewing in different directions.

[0020] S3. After the inspection of printed products is completed, qualified printed products and unqualified printed products are placed separately on the collection boxes on both sides of the processing table to distinguish qualified products from unqualified products to avoid mixing the two. After the inspection is completed, the collection box is removed from the fixed frame and the printed products are taken out of it for storage or re-work.

[0021] The present invention has at least the following beneficial effects:

[0022] By setting up the precise positioning structure, according to the size of the printed product, the screws around the support table are rotated so that the screws, sliding rods and limit frames cooperate to drive the positioning plate to move, and the position of the positioning plate is adjusted according to the marked lines set on the surface of the support table until the space between the four positioning plates is adjusted to the same size as the printed product. Under the limitation of multiple positioning plates in the precise positioning structure, the printed product to be inspected can be accurately positioned on the processing table, that is, directly below the visual inspection instrument body, thereby effectively preventing the placement of the printed product from being offset, improving the inspection effect of the visual inspection instrument body on the printed product, and improving the manufacturing quality of the printed product. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 It is a schematic diagram of the marking line structure of the present invention;

[0026] Figure 3 It is a schematic diagram of the support block structure of the present invention;

[0027] Figure 4 It is a schematic diagram of the structure of the fill light of the present invention;

[0028] Figure 5 It is a schematic diagram of the clamping rod structure of the present invention;

[0029] Figure 6 It is a schematic diagram of the structure of the collection box of the present invention.

[0030] In the figure, 1. processing table; 2. guide rail; 3. hydraulic telescopic rod; 4. visual inspection instrument body; 5. precise positioning structure; 6. support table; 7. fixing plate; 8. screw; 9. positioning plate; 10. slide bar; 11. limit frame; 12. marking line; 13. first spring; 14. support block; 15. magnetic block; 16. magnetic plate; 17. air hole; 18. air pump; 19. sealing frame; 20. fixing frame; 21. fill light; 22. support frame; 23. second spring; 24. clamping rod; 25. pull rod; 26. slide rail; 27. slider; 28. fixing rod; 29. ​​display screen; 30. fixing frame; 31. collection box; 32. label box; 33. fixing block; 34. bolt; 35. limit block; 36. handle. DETAILED DESCRIPTION

[0031] 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. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0032] like Figure 1-Figure 6 As shown, this embodiment provides an embodiment of a visual inspection device and method for packaging and decoration printed matter.

[0033] A visual inspection device for packaging and decoration printed materials comprises a processing table 1 and a guide rail 2, a hydraulic telescopic rod 3 is fixedly mounted on the guide rail 2, a visual inspection instrument body 4 is fixedly mounted on the output end of the hydraulic telescopic rod 3, a precise positioning structure 5 is provided on the processing table 1, the precise positioning structure 5 comprises a support table 6 fixedly mounted on the top of the processing table 1, a fixed plate 7 is fixedly mounted on all four sides of the support table 6, a screw rod 8 is movably mounted on the fixed plate 7, a positioning plate 9 is movably mounted on one end of the screw rod 8, a sliding rod 10 is fixedly mounted on the top of the positioning plate 9, a limit frame 11 used in conjunction with the sliding rod 10 is fixedly mounted on the top of the fixed plate 7, and a marking line 12 is provided on the surface of the fixed plate 7. By setting the precise positioning structure 5, according to the size of the printed product, the screws 8 around the support table 6 are rotated so that the screws 8, the slide rods 10 and the limit frame 11 cooperate to drive the positioning plate 9 to move, and the position of the positioning plate 9 is adjusted according to the marking lines 12 set on the surface of the support table 6 until the space between the four positioning plates 9 is adjusted to the same size as the printed product. Under the limitation of the multiple positioning plates 9 in the precise positioning structure 5, the printed product to be inspected can be accurately positioned on the processing table 1, that is, directly below the visual inspection instrument body 4, thereby effectively preventing the placement of the printed product from being offset, improving the inspection effect of the visual inspection instrument body 4 on the printed product, and improving the manufacturing quality of the printed product.

[0034] In this embodiment, Figure 2 , Figure 3 , Figure 4 and Figure 5As shown, a support block 14 installed and connected by multiple first springs 13 is provided on the limit frame 11, a magnetic block 15 is fixedly installed on one end of the support block 14 that passes through the limit frame 11, a magnetic plate 16 is fixedly installed on the top of the slide bar 10, a plurality of air holes 17 are opened on the support table 6, an air pump 18 installed on the processing table 1 is provided below the support table 6, a sealing frame 19 connected to the support table 6 is fixedly installed on the output end of the air pump 18, a fixing frame 20 is provided on the visual inspection instrument body 4, and a fill light 21 is fixedly installed on the fixing frame 20. By setting the first spring 13, the support block 14, the magnetic block 15 and the magnetic plate 16, after the screw rod 8 is rotated to adjust the position of the positioning plate 9, the support block 14 is driven to descend under the reset of multiple first springs 13, so that the magnetic block 15 at the bottom of the support block 14 is fitted and adsorbed with the magnetic plate 16 on the slide bar 10, and the slide bar 10 can be started to limit and fix under the adsorption and fixation of the magnetic block 15 and the magnetic plate 16, which indirectly limits the screw rod 8 and the positioning plate 9, preventing the screw rod 8 from accidentally hitting the screw rod 8 and causing its rotation to cause displacement of the positioning plate 9. Through the arrangement of the air holes 17, the air pump 18 and the sealing frame 19, the printed matter can be fixed. After the printed matter is placed on the support table 6, the air pump 18 is started to adsorb the printed matter through the multiple air holes 17, so that the printed matter is fixed on the support table 6, replacing the traditional clamping and fixing method, avoiding partial coverage of the printed matter and preventing the detection from being affected. Through the arrangement of the fixing frame 20 and the fill light 21, it can serve as a supplementary light source for the detection of the visual inspection instrument body 4, further improving the detection effect of the visual inspection instrument body 4.

[0035] In this embodiment, Figure 1 and Figure 5The fixed frame 20 shown is fixedly installed with support frames 22 on both sides, and a second spring 23 is fixedly installed inside the support frame 22. A clamping rod 24 movably arranged on the fixed frame 20 is fixedly installed on one end of the second spring 23. Limiting grooves that engage with the clamping rod 24 are provided on both sides of the visual inspection instrument body 4. A pull rod 25 is fixedly installed on the other end of the clamping rod 24. The pull rod 25 passes through the second spring 23 and extends to the outside of the support frame 22. A slide rail 26 is fixedly installed on the surface of the processing table 1, and a slider 27 is slidably installed on the slide rail 26. A fixed rod 28 is fixedly installed on the top of the slider 27, and a display screen 29 movably installed through a bearing is provided on the fixed rod 28. By setting the support frame 22, the second spring 23, the clamping rod 24, the pull rod 25 and the limit groove, the fixed frame 20 is connected to the visual inspection instrument body 4 through the engagement of the clamping rod 24 and the limit groove, which can prevent the fill light 21 from falling off the visual inspection instrument body 4. At the same time, the clamping rod 24 is supported by the second spring 23, so that it has the ability to move. At the same time, a pull rod 25 is installed at one end of the clamping rod 24, so the clamping rod 24 can be disengaged from the limit groove by pulling the pull rod 25, so that the fill light 21 can be removed from the visual inspection instrument body 4, which is convenient for replacement when damaged. By setting the slide rail 26, the slider 27, the fixed rod 28 and the display screen 29, the display screen 29 can be moved around the processing table 1 with the cooperation of the slide rail 26 and the slider 27, which is convenient for the staff to pull the display screen 29 in different directions for viewing. At the same time, the display screen 29 and the fixed rod 28 are connected by a bearing, so that the display screen 29 has the function of rotating angle.

[0036] In this embodiment, Figure 1 and Figure 6 The processing table 1 shown is fixedly installed with a fixed frame 30 on both sides, a collection box 31 is arranged inside the fixed frame 30, a label box 32 is fixedly installed on the front of the fixed frame 30, two fixed blocks 33 are fixedly installed on the surface of the fixed frame 30, bolts 34 are movably installed on the fixed blocks 33, a plurality of limit blocks 35 adapted to the bolts 34 are fixedly installed on the collection box 31, and a handle 36 is fixedly installed on the surface of the collection box 31. Through the arrangement of the fixed frame 30, the collection box 31 and the label box 32, the qualified printed products after the inspection and the unqualified printed products can be distinguished and placed to avoid mixing the two. Through the arrangement of the fixed block 33, the bolt 34, the limit block 35 and the handle 36, after the collection box 31 is placed on the collection box 31, the bolt 34 is turned to connect one end of the bolt 34 with the limit block 35, so that the collection box 31 can be limited to prevent the collection box 31 from falling off the fixed frame 30, and the arrangement of the handle 36 makes it convenient to pull and take out the collection box 31.

[0037] In this embodiment, if Figure 1-Figure 6 As shown, the working process of a packaging and decoration printed matter visual inspection device and inspection method provided in this embodiment is as follows:

[0038] Step 1: According to the size of the printed matter, rotate the screws 8 around the support platform 6, so that the screws 8, the slide bar 10 and the limit frame 11 cooperate to drive the positioning plate 9 to move, and adjust the position of the positioning plate 9 according to the marking lines 12 set on the surface of the support platform 6 until the space between the four positioning plates 9 is adjusted to the same size as the printed matter;

[0039] Step 2, then place the printed matter on the support table 6, start the guide rail 2 and the hydraulic telescopic rod 3 to drive the visual inspection instrument body 4 to move and lift to perform visual inspection on the printed matter, and the inspected image is transmitted to the display screen 29 for display. The staff can pull the display screen 29 to slide on the slide rail 26 through the slider 27 to change the position, so as to facilitate viewing in different directions;

[0040] Step 3: After the printed product is inspected, the qualified printed products and the unqualified printed products are placed separately on the collection boxes 31 on both sides of the processing table 1 to distinguish the qualified products from the unqualified products to avoid mixing the two. After the inspection is completed, the collection box 31 is removed from the fixed frame 30, and the printed products are taken out of it for storage or re-processing.

[0041] In summary, in this embodiment, according to a packaging and decoration printed matter visual inspection device and inspection method of this embodiment, by setting the first spring 13, the support block 14, the magnetic block 15 and the magnetic plate 16, after the screw 8 is rotated to adjust the position of the positioning plate 9, the support block 14 is driven to descend under the reset of multiple first springs 13, so that the magnetic block 15 at the bottom of the support block 14 is fitted and adsorbed with the magnetic plate 16 on the slide bar 10, and the slide bar 10 can be started to limit and fix under the adsorption and fixation of the magnetic block 15 and the magnetic plate 16, which indirectly limits the screw 8 and the positioning plate 9, preventing the screw 8 from accidentally touching it and causing it to rotate and cause the positioning plate 9 to be displaced, and through the air hole 17 The arrangement of the air pump 18 and the sealing frame 19 can fix the printed matter. After placing the printed matter on the support table 6, the air pump 18 is started to adsorb the printed matter through the multiple air holes 17, so that the printed matter is fixed on the support table 6, replacing the traditional clamping and fixing method, avoiding partial coverage of the printed matter, and preventing the detection from being affected. The arrangement of the fixing frame 20 and the fill light 21 can play the role of supplementary light source for the detection of the visual inspection instrument body 4, and further improve the detection effect of the visual inspection instrument body 4. The arrangement of the support frame 22, the second spring 23, the clamping rod 24, the pull rod 25 and the limit groove, the fixing frame 20 and the visual inspection instrument body 4 The connection is made by the engagement of the clamping rod 24 with the limiting groove, which can prevent the fill light 21 from falling off the visual inspection instrument body 4. At the same time, the clamping rod 24 is supported by the second spring 23, so that it has the ability to move. At the same time, a pull rod 25 is installed at one end of the clamping rod 24, so the clamping rod 24 can be disengaged from the limiting groove by pulling the pull rod 25, so that the fill light 21 can be removed from the visual inspection instrument body 4, which is convenient for replacement when damaged. Through the arrangement of the slide rail 26, the slider 27, the fixing rod 28 and the display screen 29, the display screen 29 can be moved around the processing table 1 under the cooperation of the slide rail 26 and the slider 27, which is convenient for the staff to pull the display screen in different directions. The display screen 29 is used for viewing, and a bearing is used between the display screen 29 and the fixed rod 28 to enable the display screen 29 to have the function of rotating angle. Through the arrangement of the fixed frame 30, the collection box 31 and the label box 32, the qualified printed products after inspection and the unqualified printed products can be distinguished and placed to avoid mixing the two. Through the arrangement of the fixed block 33, the bolt 34, the limit block 35 and the handle 36, after placing the collection box 31 on the collection box 31, the bolt 34 is turned to connect one end of it with the limit block 35, so that the collection box 31 can be limited to prevent the collection box 31 from falling off from the fixed frame 30, and the arrangement of the handle 36 makes it convenient to pull the collection box 31 out.

[0042] For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

[0043] It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

[0044] The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. Changes and variations made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims

1. A visual inspection device for packaging and decoration printed matter, comprising a processing table (1) and a guide rail (2), wherein a hydraulic telescopic rod (3) is fixedly mounted on the guide rail (2), and a visual inspection instrument body (4) is fixedly mounted on the output end of the hydraulic telescopic rod (3), characterized in that: The processing table (1) is provided with a precise positioning structure (5), and the precise positioning structure (5) comprises a support table (6) fixedly mounted on the top of the processing table (1), and fixed plates (7) are fixedly mounted on all four sides of the support table (6), and a screw rod (8) is movably mounted on the fixed plate (7), and a positioning plate (9) is movably mounted on one end of the screw rod (8), and a sliding rod (10) is fixedly mounted on the top of the positioning plate (9), and a limit frame (11) used in conjunction with the sliding rod (10) is fixedly mounted on the top of the fixed plate (7), and the surface of the fixed plate (7) is provided with marking lines (12).

2. A visual inspection device for packaging and decoration printed matter according to claim 1, characterized in that: The limit frame (11) is provided with a support block (14) connected by a plurality of first springs (13); a magnetic block (15) is fixedly mounted on one end of the support block (14) that passes through the limit frame (11); and a magnetic plate (16) is fixedly mounted on the top of the slide bar (10).

3. A visual inspection device for packaging and decoration printed matter according to claim 1, characterized in that: The support platform (6) is provided with a plurality of air holes (17), an air pump (18) mounted on the processing platform (1) is provided below the support platform (6), and a sealing frame (19) connected to the support platform (6) is fixedly mounted on the output end of the air pump (18).

4. The visual inspection device for packaging and decoration printed matter according to claim 1, characterized in that: A fixing frame (20) is provided on the visual inspection instrument body (4), and a fill light (21) is fixedly mounted on the fixing frame (20).

5. A visual inspection device for packaging and decoration printed matter according to claim 4, characterized in that: Support frames (22) are fixedly mounted on both sides of the fixing frame (20), a second spring (23) is fixedly mounted inside the supporting frame (22), and a clamping rod (24) movably arranged on the fixing frame (20) is fixedly mounted on one end of the second spring (23).

6. A visual inspection device for packaging and decoration printed matter according to claim 5, characterized in that: Limiting grooves that engage with the clamping rod (24) are provided on both sides of the visual inspection instrument body (4); a pull rod (25) is fixedly installed on the other end of the clamping rod (24); the pull rod (25) passes through the second spring (23) and extends to the outside of the support frame (22).

7. The visual inspection device for packaging and decoration printed matter according to claim 1, characterized in that: A slide rail (26) is fixedly mounted on the surface of the processing table (1), a slider (27) is slidably mounted on the slide rail (26), a fixing rod (28) is fixedly mounted on the top of the slider (27), and a display screen (29) is movably mounted on the fixing rod (28) via a bearing.

8. The visual inspection device for packaging and decoration printed matter according to claim 1, characterized in that: A fixing frame (30) is fixedly mounted on both sides of the processing table (1), a collecting box (31) is arranged inside the fixing frame (30), and a label box (32) is fixedly mounted on the front of the fixing frame (30).

9. A visual inspection device for packaging and decoration printed matter according to claim 8, characterized in that: Two fixing blocks (33) are fixedly mounted on the surface of the fixing frame (30), bolts (34) are movably mounted on the fixing blocks (33), a plurality of limit blocks (35) matched with the bolts (34) are fixedly mounted on the collection box (31), and a handle (36) is fixedly mounted on the surface of the collection box (31).

10. A visual inspection device and method for packaging and decoration printed matter according to claim 1, characterized in that: The following steps are involved: S1. According to the size of the printed matter, the screw rods (8) around the support platform (6) are rotated so that the screw rods (8), the slide rods (10) and the limit frame (11) cooperate to drive the positioning plate (9) to move, and the position of the positioning plate (9) is adjusted according to the marking lines (12) set on the surface of the support platform (6) until the space between the four positioning plates (9) is adjusted to the same size as the printed matter; S2, then place the printed matter on the support table (6), start the guide rail (2) and the hydraulic telescopic rod (3) to drive the visual inspection instrument body (4) to move and lift to perform visual inspection on the printed matter, and transmit the inspected image to the display screen (29) for display. The staff can pull the display screen (29) to slide on the slide rail (26) through the slider (27) to change the position, so as to facilitate viewing in different directions; S3. After the printed matter is inspected, qualified printed matter and unqualified printed matter are placed separately on the collecting boxes (31) on both sides of the processing table (1) to distinguish qualified products from unqualified products to avoid mixing the two. After the inspection is completed, the collecting box (31) is removed from the fixing frame (30) and the printed matter is taken out of it for storage or re-processing.

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