Quality detection device for concave-convex printed matter

Abstract

The invention relates to the technical field of presswork detection, in particular to a quality detection device for concave-convex presswork, which comprises a box body, a support table, an illumination part, a photographing comparison part, a first driving part and a control part, the photographing comparison part comprises a first rotating shaft rotationally connected to the top of the box body and an image comparison module, the upper end of the first rotating shaft is located outside the box body, the lower end of the first rotating shaft is located inside the box body, a mounting frame is arranged at the lower end of the first rotating shaft, two sets of rotating supports are symmetrically arranged on the mounting frame, and cameras are arranged at the bottoms of the supports; a vertically-arranged first electric cylinder is arranged on the mounting frame, a lifting piece is arranged on a telescopic rod of the first electric cylinder, and a connecting rod is hinged between the lifting piece and the support. By automatically changing the positions of the two cameras, whether the quality problem of the concave-convex printed matter exists or not can be further judged, and the comprehensiveness of the judgment result is improved.

Description

Technical Field

[0001] The invention relates to the technical field of printed matter detection, and in particular to a quality detection device for convex-concave printed matter. Background Art

[0002] Existing quality inspection devices for embossed printed products usually include a camera, a light box, a placement mechanism, and a camera clamping mechanism. The basic principle is as follows: the system uses a camera to capture defect-free printed products as standard images, and then captures images to be inspected during inspection. Whether the embossed positions in the image to be inspected are consistent with those in the standard image is used to determine whether the embossed positions are qualified.

[0003] The patent with application number 201910661081.2 discloses a quality inspection device for embossed printed products, including a box body, a box door is provided at the front opening of the box body, a through hole is opened in the middle of the bottom side of the box body, a nut is provided in the through hole, a screw rod is installed in the internal thread of the nut, a first gear is fixedly installed at the lower end of the screw rod, a motor is fixedly installed on one side of the bottom side of the box body, a coaxial gear column is fixedly installed at the lower end of the motor shaft, the first gear is meshed with the gear column, a coaxial fixing ring is installed on the upper end bearing of the outer periphery of the screw rod, and horizontal plates are fixedly installed on the left and right sides of the fixing ring, and the outer sides of the bottom side of the horizontal plate are respectively fixedly connected to the upper ends of the telescopic rods, and the lower ends of the telescopic rods are respectively fixedly connected to the bottom of the box body.

[0004] The inventors have discovered that the above solution has some deficiencies. For example, when one of the cameras fails, it is unclear whether the failure of the camera causes the detected embossed print to be unqualified, or whether the embossed print itself is of unqualified quality. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a quality inspection device for embossed prints to solve the problem that when one of the cameras fails, it is unclear whether the embossed prints are unqualified due to the camera failure or the embossed prints themselves are of unqualified quality.

[0006] Based on the above purpose, the present invention provides a quality inspection device for embossed printed products, including a box body, a support table, an illumination unit, a camera comparison unit, a first drive unit and a control unit, wherein:

[0007] The support platform is arranged inside the box;

[0008] The lighting unit includes two groups of main lighting lamps which are symmetrically arranged, and the main lighting lamps are installed inside the box and located above the support platform;

[0009] The camera comparison part includes a first rotating shaft rotatably connected to the top of the box and an image comparison module, the upper end of the first rotating shaft is located outside the box, the lower end of the first rotating shaft is located inside the box, a mounting frame is provided at the lower end of the first rotating shaft, two groups of rotating brackets are symmetrically arranged on the mounting frame, a camera is provided at the bottom of the bracket, a vertically arranged first electric cylinder is provided on the mounting frame, a lifting member is provided on the telescopic rod of the first electric cylinder, and a connecting rod is hinged between the lifting member and the bracket;

[0010] The first driving part is in driving connection with the upper end of the first rotating shaft, and is used for driving the first rotating shaft to rotate;

[0011] When the image comparison module detects that the photo taken by one of the cameras is qualified and the photo taken by the other camera is unqualified, the control unit controls the first driving unit to drive the first rotating shaft to rotate 180 degrees, and the camera after the replacement is used to take photos again for detection.

[0012] Optionally, the lighting unit also includes two groups of backup lighting lamps, and the two groups of backup lighting lamps are respectively arranged below the main lighting lamps. When the image comparison module detects that the photos taken by the two cameras are unqualified, the controller controls the main lighting lamp to turn off and the backup lighting lamp to turn on, and the camera is used to take photos again for detection.

[0013] Optionally, a second rotating shaft is provided at the bottom of the support platform, a base frame is provided at the bottom of the second rotating shaft, the second rotating shaft is rotatably connected to the base frame, a first motor is provided on the base frame, a first gear is provided on the rotating shaft of the first motor, the first gear is meshed with a second gear, and the second gear is fixedly sleeved on the second rotating shaft.

[0014] Optionally, the box body is further provided with a cleaning unit, and the cleaning unit is used to clean dust on the embossed printed matter.

[0015] Optionally, the cleaning part includes a blowing pipe arranged on one side of the interior of the box, a hair dryer is connected in series to the blowing pipe, a suction pipe is provided at another place inside the box, a suction fan is connected in series to the suction pipe, and a collection box is provided at one end of the suction pipe, which is used to collect dust.

[0016] Optionally, the device further includes a fixed adjustment portion, which includes a plurality of fixed units arranged on the support platform and an adjustment unit arranged on the blow pipe, wherein the fixed unit can fix the embossed printed matter, and the adjustment unit can adjust the air outlet angle of the blow pipe.

[0017] Optionally, the fixing unit includes a connecting block in the shape of a "7", the connecting block is slidably connected to the support platform, a spring is provided on the connecting block, a pressure plate is provided at the bottom of the spring, and the adjusting unit includes a bell-shaped mouth arranged on one side of the blowing pipe, the bell-shaped mouth is connected to the blowing pipe through a hose, a connecting rod is provided in the middle of the bell-shaped mouth, one end of the connecting rod is rotatably connected to the middle of the blowing pipe, a second electric cylinder is hinged at the lower end of the bell-shaped mouth, and one end of the second electric cylinder is hinged to the inner wall of the box.

[0018] Optionally, the first driving unit includes a second motor arranged on the top of the box body, a third gear is provided on the rotating shaft of the second motor, the third gear is meshed with a fourth gear, and the fourth gear is fixedly sleeved on the upper end of the first rotating shaft.

[0019] When the device is used to inspect the quality of embossed printed products, the embossed printed products are placed on a support table, and two sets of main lighting lamps are turned on. The height of the lifting member can be adjusted by adjusting the length of the first electric cylinder. The movement of the lifting member can drive the bracket to rotate through the connecting rod, thereby adjusting the angle of the bracket. The camera angle can then be adjusted by adjusting the angle of the bracket to meet different photography needs. Then, two sets of cameras are used to take photos to obtain real-time photos of the embossed printed products. Then, an image comparison module is used to perform comparison inspection. When the photos taken by the two cameras are both qualified, the quality of the embossed printed products is judged to be qualified. When the image comparison module detects that the photos taken by one of the cameras are qualified, the other camera is checked. When the photos taken by the camera are unqualified, the control unit controls the first driving unit to drive the first rotating shaft to rotate 180 degrees, thereby driving the two cameras to change positions, and the cameras after the change of positions take photos again for detection. After the change of positions, if the photos taken by the camera that took qualified photos last time are judged to be qualified again, and at the same time, the photos taken by the camera that took unqualified photos last time are judged to be unqualified again, it is judged that the photos taken are unqualified due to the failure of the corresponding camera. After the change of positions, if the photos taken by the camera that took qualified photos last time are judged to be unqualified, and at the same time, the photos taken by the camera that took unqualified photos last time are judged to be qualified, the judgment result is that the quality of the embossed print is unqualified.

[0020] From the above, it can be seen that when the image comparison module detects that the photos taken by one of the cameras are qualified and the photos taken by the other camera are unqualified, it can automatically swap the positions of the two cameras to further determine whether there is a quality problem of the embossed print, thereby improving the comprehensiveness of the judgment result. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0022] Figure 1 It is a structural schematic diagram of a detection device according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of a cleaning unit according to an embodiment of the present invention;

[0024] Figure 3 for Figure 2 Left view of the middle bell mouth;

[0025] Figure 4 for Figure 2 A top view of the middle support platform;

[0026] Figure 5 for Figure 2 A side view of the middle support platform;

[0027] The numbers in the figure are:

[0028] 1. Box body; 2. Support table; 3. Main lighting lamp; 4. First rotating shaft; 5. Mounting frame; 6. Bracket; 7. Camera; 8. First electric cylinder; 9. Lifting member; 10. Connecting rod; 11. Backup lighting lamp; 12. Second rotating shaft; 13. Base frame; 14. First motor; 15. First gear; 16. Second gear; 17. Blowing pipe; 18. Blower; 19. Suction pipe; 20. Suction fan; 21. Collecting box; 22. Connecting block; 23. Spring; 24. Pressing plate; 25. Bell mouth; 26. Hose; 27. Connecting rod; 28. Second electric cylinder; 29. ​​Second motor; 30. Third gear; 31. Fourth gear. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0030] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0031] like Figure 1 As shown, a quality inspection device for embossed printed products includes a box body 1, a support table 2, an illumination unit, a camera comparison unit, a first drive unit, and a control unit, wherein:

[0032] The support platform 2 is arranged inside the box 1;

[0033] The lighting unit includes two groups of main lighting lamps 3 which are symmetrically arranged. The main lighting lamps 3 are installed inside the box 1 and are located above the support platform 2.

[0034] The camera comparison part includes a first rotating shaft 4 rotatably connected to the top of the box body 1 and an image comparison module, the upper end of the first rotating shaft 4 is located outside the box body 1, the lower end of the first rotating shaft 4 is located inside the box body 1, and a mounting frame 5 is provided at the lower end of the first rotating shaft 4, two groups of rotating brackets 6 are symmetrically arranged on the mounting frame 5, a camera 7 is arranged at the bottom of the bracket 6, a vertically arranged first electric cylinder 8 is arranged on the mounting frame 5, a lifting member 9 is arranged on the telescopic rod of the first electric cylinder 8, and a connecting rod 10 is hinged between the lifting member 9 and the bracket 6;

[0035] The first driving part is in driving connection with the upper end of the first rotating shaft 4, and is used for driving the first rotating shaft 4 to rotate;

[0036] When the image comparison module detects that the photo taken by one of the cameras 7 is qualified and the photo taken by the other camera 7 is unqualified, the control unit controls the first driving unit to drive the first rotating shaft 4 to rotate 180 degrees, and the camera 7 after the repositioning is used to take photos again for detection.

[0037] When the device is used to inspect the quality of embossed printed products, the embossed printed products are placed on the support table 2, and the two sets of main lighting lamps 3 are turned on. The height of the lifting member 9 can be adjusted by adjusting the length of the first electric cylinder 8. The movement of the lifting member 9 can drive the bracket 6 to rotate through the connecting rod 10, thereby adjusting the angle of the bracket 6. Then, the shooting angle of the camera 7 can be adjusted by adjusting the angle of the bracket 6 to meet different shooting needs. Then, the two sets of cameras 7 are used to take pictures to obtain real-time pictures of the embossed printed products. Then, the image comparison module is used to perform comparison inspection. When the pictures taken by the two cameras 7 are both qualified, the quality of the embossed printed products is judged to be qualified. When the image comparison module detects that the pictures taken by one of the cameras 7 are qualified, the other camera is used to compare the pictures. When the photos taken by one of the cameras 7 are unqualified, the control unit controls the first driving unit to drive the first rotating shaft 4 to rotate 180 degrees, thereby driving the two cameras 7 to exchange positions, and the cameras 7 after the exchange are used to take photos and detect again. After the exchange, the photos taken by the camera 7 that took qualified photos last time are judged to be qualified again, and at the same time, the photos taken by the camera 7 that took unqualified photos last time are judged to be unqualified again. At this time, it is judged that the photos taken are unqualified due to the failure of the corresponding camera 7. After the exchange, the photos taken by the camera 7 that took qualified photos last time are judged to be unqualified, and at the same time, the photos taken by the camera 7 that took unqualified photos last time are judged to be qualified. At this time, the judgment result is that the quality of the embossed printed product is unqualified.

[0038] From the above, it can be seen that when the image comparison module detects that the photo taken by one of the cameras 7 is qualified and the photo taken by the other camera 7 is unqualified, it can automatically swap the positions of the two cameras 7 to further determine whether it is a quality problem of the embossed print, thereby improving the comprehensiveness of the judgment result.

[0039] like Figure 1 As shown, in some embodiments, the lighting unit also includes two groups of backup lighting lamps 11, and the two groups of backup lighting lamps 11 are respectively arranged below the main lighting lamp 3. When the image comparison module detects that the photos taken by the two cameras 7 are unqualified, the controller controls the main lighting lamp 3 to turn off, and the backup lighting lamp 11 to turn on, and the camera 7 is used to take photos again for detection.

[0040] During operation, when the image comparison module detects that the photos taken by the two cameras 7 are unqualified, it is possible that the main lighting lamp 3 has a fault, resulting in the photos being unqualified after comparison. If it is directly judged as a quality problem of the embossed print at this time, it may lead to misjudgment. Therefore, in this embodiment, when the image comparison module detects that the photos taken by the two cameras 7 are unqualified, the controller controls the main lighting lamp 3 to turn off and the backup lighting lamp 11 to turn on, and the camera 7 takes another photo for detection. At this time, the image comparison module compares the taken photos with the standard pictures when the backup lighting lamp 11 is turned on. When the taken photos are judged to be qualified, the judgment result is that the main lighting lamp 3 is damaged. When the taken photos are judged to be unqualified, it is judged to be a quality problem of the embossed print. The accuracy of the judgment is improved in the above manner.

[0041] like Figure 1 As shown, in some embodiments, a second rotating shaft 12 is provided at the bottom of the support platform 2, a bottom frame 13 is provided at the bottom of the second rotating shaft 12, the second rotating shaft 12 is rotatably connected to the bottom frame 13, a first motor 14 is provided on the bottom frame 13, a first gear 15 is provided on the rotating shaft of the first motor 14, the first gear 15 is meshed with a second gear 16, and the second gear 16 is fixedly sleeved on the second rotating shaft 12. During operation, the first motor 14 drives the first gear 15 to rotate, the first gear 15 drives the second gear 16 to rotate, and the second gear 16 drives the second rotating shaft 12 to rotate, thereby driving the support platform 2 on the top of the second rotating shaft 12 to rotate, so as to adjust the shooting position of the convex-concave printed matter on the support platform 2.

[0042] In some embodiments, the box 1 is further provided with a cleaning unit for cleaning dust on the embossed print. The dust on the embossed print may cause misjudgment when comparing the photographed photos, so the present invention designs a cleaning unit for cleaning dust on the embossed print.

[0043] like Figure 2-Figure 3 As shown, optionally, the cleaning part includes a blowing pipe 17 arranged on one side of the interior of the box body 1, and a hair dryer 18 is connected in series to the blowing pipe 17. A suction pipe 19 is provided at another place inside the box body 1, and a suction fan 20 is connected in series to the suction pipe 19. A collecting box 21 is provided at one end of the suction pipe 19, and the collecting box 21 is used to collect dust.

[0044] During operation, the blower 18 generates airflow, which is blown out through the blowing pipe 17 onto the embossed printed matter on the support table 2 to clean the dust on the embossed printed matter. At the same time, the suction fan 20 works to generate negative pressure at the air inlet of the subdivision pipe, thereby absorbing the blown dust, and the absorbed dust falls into the collection box 21, thereby cleaning the dust on the embossed printed matter.

[0045] In some embodiments, the device further includes a fixing and adjusting unit, which includes a plurality of fixing units disposed on the support platform 2 and an adjusting unit disposed on the blowing pipe 17, wherein the fixing unit can fix the embossed printed matter, and the adjusting unit can adjust the air outlet angle of the blowing pipe 17. The design of the fixing unit and the adjusting unit is used to further improve the cleaning effect of dust on the embossed printed matter.

[0046] like Figure 2 , Figure 4 and Figure 5 As shown, optionally, the fixing unit includes a connecting block 22 in the shape of a "7", the connecting block 22 is slidably connected to the support platform 2, a spring 23 is provided on the connecting block 22, a pressure plate 24 is provided at the bottom of the spring 23, and the adjusting unit includes a bell mouth 25 arranged on one side of the blowing pipe 17, the bell mouth 25 is connected to the blowing pipe 17 through a hose 26, a connecting rod 27 is provided in the middle of the bell mouth 25, one end of the connecting rod 27 is rotatably connected to the middle of the blowing pipe 17, and a second electric cylinder 28 is hinged at the lower end of the bell mouth 25, and one end of the second electric cylinder 28 is hinged to the inner wall of the box body 1.

[0047] During operation, the embossed printed matter is placed on the support table 2, and then the connecting block 22 is moved so that the pressure plate 24 is located above the embossed printed matter, and then the pressure plate 24 is released. Under the action of the force of the spring 23, the embossed printed matter is pressed by the pressure plate 24. At the same time, the angle of the bell mouth 25 can be adjusted by the production and shortening of the second electric cylinder 28, and then the angle of the air outlet can be adjusted, so that the direction of the air outlet can be better facing the part that needs to be cleaned. At the same time, the embossed printed matter can be rotated by the operation of the first motor 14. Combined with the design of the bell mouth 25, it can ensure that the dust on the embossed printed matter is cleaned more comprehensively and effectively.

[0048] like Figure 1 As shown, in some embodiments, the first driving unit includes a second motor 29 disposed on the top of the box body 1, and a third gear 30 is disposed on the rotating shaft of the second motor 29, and the third gear 30 is meshed with a fourth gear 31, and the fourth gear 31 is fixedly sleeved on the upper end of the first rotating shaft 4. When working, the third gear 30 is driven to rotate by the second motor 29, and the third gear 30 drives the fourth gear 31 to rotate, and the fourth gear 31 drives the first rotating shaft 4 to rotate, thereby driving the mounting frame 5 to rotate, and then driving the bracket 6 on the mounting frame 5 to rotate, so as to drive the camera 7 at the lower end of the bracket 6 to rotate 180 degrees. When it is necessary to restore to the initial position, the second motor 29 is controlled to drive the first rotating shaft 4 to rotate 180 degrees in the opposite direction.

[0049] It should be understood by those skilled in the art that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Within the scope of the present invention, the technical features in the above embodiments or in different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the above aspects of the present invention, which are not provided in detail for the sake of simplicity.

[0050] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A quality inspection device for embossed printed matter, comprising a housing (1), characterized in that: Also includes: A support platform (2), an illumination unit, a camera comparison unit, a first drive unit and a control unit, wherein: The support platform (2) is arranged inside the box (1); The lighting unit comprises two groups of main lighting lamps (3) which are symmetrically arranged. The main lighting lamps (3) are installed inside the box (1) and are located above the support platform (2); The camera comparison unit comprises a first rotating shaft (4) rotatably connected to the top of the box (1) and an image comparison module, the upper end of the first rotating shaft (4) is located outside the box (1), the lower end of the first rotating shaft (4) is located inside the box (1), a mounting frame (5) is provided at the lower end of the first rotating shaft (4), two groups of rotating brackets (6) are symmetrically arranged on the mounting frame (5), a camera (7) is provided at the bottom of the bracket (6), a vertically arranged first electric cylinder (8) is provided on the mounting frame (5), a lifting member (9) is provided on the telescopic rod of the first electric cylinder (8), and a connecting rod (10) is hinged between the lifting member (9) and the bracket (6); The first driving part is in driving connection with the upper end of the first rotating shaft (4) and is used for driving the first rotating shaft (4) to rotate; When the image comparison module detects that the photo taken by one of the cameras (7) is qualified and the photo taken by the other camera (7) is unqualified, the control unit controls the first driving unit to drive the first rotating shaft (4) to rotate 180 degrees, and the camera (7) after the position change is used to take photos again for detection.

2. The quality inspection device for embossed printed matter according to claim 1, characterized in that: The lighting unit further comprises two groups of backup lighting lamps (11), the two groups of backup lighting lamps (11) being respectively arranged below the main lighting lamp (3); when the image comparison module detects that the photos taken by the two cameras (7) are unqualified, the controller controls the main lighting lamp (3) to be turned off, the backup lighting lamp (11) to be turned on, and the camera (7) is used to take photos for detection again.

3. The quality inspection device for embossed printed matter according to claim 1, characterized in that: A second rotating shaft (12) is provided at the bottom of the support platform (2), a base frame (13) is provided at the bottom of the second rotating shaft (12), the second rotating shaft (12) is rotatably connected to the base frame (13), a first motor (14) is provided on the base frame (13), a first gear (15) is provided on the rotating shaft of the first motor (14), the first gear (15) is meshed with a second gear (16), and the second gear (16) is fixedly sleeved on the second rotating shaft (12).

4. The quality inspection device for embossed printed matter according to claim 3, characterized in that: The box body (1) is also provided with a cleaning part, which is used to clean dust on the embossed printed matter.

5. The quality inspection device for embossed printed matter according to claim 4, characterized in that: The cleaning section comprises a blowing pipe (17) arranged at one side of the interior of the housing (1), a hair dryer (18) being connected in series to the blowing pipe (17), a suction pipe (19) being provided at another location inside the housing (1), a suction fan (20) being connected in series to the suction pipe (19), and a collection box (21) being provided at one end of the suction pipe (19), the collection box (21) being used to collect dust.

6. The quality inspection device for embossed printed matter according to claim 5, characterized in that: The device also includes a fixing and adjusting portion, which includes a plurality of fixing units arranged on the support platform (2) and an adjusting unit arranged on the blowing pipe (17), wherein the fixing unit is capable of fixing the embossed printed matter, and the adjusting unit is capable of adjusting the air outlet angle of the blowing pipe (17).

7. The quality inspection device for embossed printed matter according to claim 6, characterized in that: The fixing unit comprises a connection block (22) in the shape of a letter "7", the connection block (22) being slidably connected to the support platform (2), a spring (23) being provided on the connection block (22), a pressure plate (24) being provided at the bottom of the spring (23), the adjustment unit comprising a bell mouth (25) arranged at one side of the blowing pipe (17), the bell mouth (25) being connected to the blowing pipe (17) via a hose (26), a connecting rod (27) being provided at the middle of the bell mouth (25), one end of the connecting rod (27) being rotatably connected to the middle of the blowing pipe (17), a second electric cylinder (28) being hinged at the lower end of the bell mouth (25), one end of the second electric cylinder (28) being hinged to the inner wall of the box body (1).

8. The quality inspection device for embossed printed matter according to claim 1, characterized in that: The first driving unit comprises a second motor (29) arranged on the top of the box body (1); a third gear (30) is provided on the rotating shaft of the second motor (29); the third gear (30) is meshed with a fourth gear (31); and the fourth gear (31) is fixedly sleeved on the upper end of the first rotating shaft (4).

Images