Packaging box appearance inspection device and inspection method

Abstract

The present invention discloses a packaging box appearance detection device and a detection method thereof. The packaging box appearance detection device of the present invention includes a first positioning device, a first detection device and a flipping mechanism. The flipping mechanism is arranged at the positioning terminal of the first positioning device, and the detection direction of the first detection device is arranged facing the flipping position of the flipping mechanism. The detection method includes positioning and flipping. During the flipping process, a camera is used to detect each unclamped surface in turn, positioning again, and detecting the two opposite surfaces that have not been detected, and the detection data is transmitted to a service processor. The service processor removes packaging boxes with problems in appearance quality. The beneficial effect is: compared with the existing solution of setting a detection device for each detection surface, it saves equipment, requires less installation space, and thus reduces equipment costs. The three-dimensional adjustment method ensures that the surface to be detected is always at the focal length position of the first detection device, and the acquired image is clearer and more complete.

Description

Technical Field

[0001] The present invention belongs to the field of tobacco machinery and equipment, and in particular relates to a packaging box appearance detection device and a detection method thereof. Background Art

[0002] With the development and progress of society, product packaging has a significant impact on consumers' most intuitive experience of the product, and the appearance quality of product packaging has received increasing attention. Take cigarette carton packaging as an example. In modern cigarette production, finished small packs of cigarettes undergo a series of steps, including carton packaging, carton wrapping with transparent paper, carton cosmetic treatment, missing pack detection, and carton conveying, before finally entering the carton sealing machine. Factors affecting the appearance quality of cigarette carton packaging exist in each step before entering the carton sealing machine. In actual production, the appearance quality of cigarette carton packaging is a key focus of defect detection. Traditionally, the transparent paper defect detection process relies on manual inspection of the transparent paper quality, which is highly inefficient, easily fatigues operators, is extremely labor-intensive, and is prone to missed inspections. Existing cigarette carton appearance inspection equipment typically uses a camera on each surface for inspection. The large number of cameras not only increases equipment cost but also increases installation complexity. Furthermore, due to limited installation space, not all cameras can be directly facing the inspection surface of the cigarette carton. Therefore, no matter considering the installation or cost control, the ideal state cannot be achieved. Therefore, it is very meaningful to develop a device that can comprehensively detect the appearance of the packaging box and solve the above technical problems. Summary of the Invention

[0003] The object of the present invention is to provide a packaging box appearance inspection device and inspection method with simple structure, convenient installation and low cost.

[0004] The present invention provides a packaging box appearance inspection device, and its technical solution is:

[0005] A packaging box appearance inspection device comprises a first positioning device, a first detection device and a flipping mechanism, wherein the flipping mechanism is arranged at the positioning terminal of the first positioning device, and the detection direction of the first detection device is arranged facing the flipping position of the flipping mechanism.

[0006] Preferably, the detection device further comprises a second positioning device and a second detection device, the second positioning device is supported on the working end of the lower part of the flipping mechanism, and the second detection device is arranged at the rear of the second positioning device.

[0007] Preferably, the flipping mechanism includes a transverse adjustment unit, a longitudinal adjustment unit, a first vertical adjustment unit, a second vertical adjustment unit and a clamping head;

[0008] The first vertical adjustment unit and the second vertical adjustment unit are respectively arranged on the horizontal adjustment unit through sliders, and the sliders are connected to the driving members of the horizontal adjustment units;

[0009] The clamping head is respectively arranged on the first vertical adjustment unit and the second vertical adjustment unit through a slider, and the clamping head is connected to the flip motor through a rotating shaft;

[0010] The transverse adjustment unit is vertically arranged on the longitudinal adjustment unit through a slider, and the slider is connected to the driving member.

[0011] Preferably, the driving member is a screw structure, and the screw is driven by a driving motor.

[0012] Preferably, the driving member is a cylinder, and the telescopic end of the cylinder is connected to the slider.

[0013] Preferably, an encoder is provided on the first vertical adjustment unit or the second vertical adjustment unit, and a rotating shaft of the encoder is connected to the clamping head.

[0014] Preferably, the first positioning device includes a positioning platform, a push plate, a right positioning guide plate and a left positioning guide plate, the right positioning guide plate and the left positioning guide plate are respectively arranged on both sides of the positioning platform, the push plate is connected to the driving member, and the symmetry center line of the right positioning guide plate and the left positioning guide plate is in the same direction as the vertical line of the push plate.

[0015] Preferably, the first detection device includes a first image capture device, an auxiliary light source and a service processor, the auxiliary light source illuminates the imaging position of the first image capture device, and the first image capture device is electrically connected to the service processor.

[0016] Preferably, the second positioning device includes a positioning mold box, a left adjustment guide plate, and a right adjustment guide plate; the positioning mold box is arranged on the slider of the linear conveying unit, the left adjustment guide plate and the right adjustment guide plate are arranged on both sides of the linear conveying unit, and the left adjustment guide plate and the right adjustment guide plate are both provided with a receiving platform, and the receiving platform is arranged at the lower part of the flipping mechanism.

[0017] Preferably, the positioning mold box includes a back plate, a bottom plate and a pressure strip, the bottom plate is horizontally arranged on a slider on the linear conveying unit, the back plate is vertically arranged on the bottom plate, and the pressure strip is horizontally arranged on the upper part of the back plate.

[0018] Preferably, the second detection device comprises a second image capture device, an auxiliary light source and a service processor, wherein the auxiliary light source is directed toward the imaging position of the second image capture device;

[0019] The second image capture device is electrically connected to the service processor, and the second detection device is arranged on a side of the linear conveying unit.

[0020] Preferably, the detection device further comprises a rejection unit, and the rejection unit is arranged at the working rear end of the first detection device or the second detection device.

[0021] Preferably, the rejection unit comprises a pusher head and a cylinder, and the pusher head is connected to the telescopic end of the cylinder.

[0022] A method for inspecting the appearance of a packaging box comprises the following steps:

[0023] Step (1), positioning the packaging box to be inspected;

[0024] Step (2), clamping the opposite sides of the package box to be inspected after positioning by the clamping head, and flipping it by the flipping mechanism, and performing appearance inspection on each side not clamped in turn by the first inspection device during the flipping process;

[0025] Step (3) repositions the packaging box inspected in step (2), and performs appearance inspection on the two opposite surfaces that were not inspected in step (2) using a second inspection device, transmits the inspection data to the service processor, and the service processor rejects the packaging boxes with appearance quality problems.

[0026] The implementation of the present invention includes the following technical effects:

[0027] The packaging box appearance detection device of the present invention turns over the multiple detection surfaces of the packaging box by setting a flipping mechanism so that they face the first detection device in sequence. The first detection device is used to sequentially obtain the appearance image of the packaging box. Setting one detection device can detect multiple surfaces of the packaging box. Compared with the existing solution of setting one detection device for each detection surface, it saves equipment and requires less installation space, thereby reducing the cost of the equipment. By setting a horizontal adjustment unit, a longitudinal adjustment unit and a vertical adjustment unit (a first vertical adjustment unit and a second vertical adjustment unit), the surface to be detected of the packaging box can be adjusted to face the first detection device. The three-dimensional adjustment method ensures that the surface to be detected is always at the focal length position of the first detection device, and the image obtained is clearer and more complete. In particular, it can be used to accurately detect the size of the packaging box. The packaging box appearance detection device of the present invention can be used for online detection on the production line, and can also be used for laboratory sampling to detect the appearance quality of finished products. It is particularly suitable for detecting cigarette cartons. The beneficial effect of the detection method of the present invention is that it solves the defects of the traditional detection method that requires each surface to be detected in turn on the running track, the required formation is long, the space is large, and the bottom obstruction cannot be completely avoided for effective detection. The detection method described in the present invention can achieve effective unobstructed detection of each surface of the packaging box, and effectively detect the packaging quality of the cigarette rods. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1The figure is a schematic diagram of the three-dimensional structure of a packaging box appearance inspection device according to an embodiment of the present invention.

[0029] Figure 2 It is a schematic diagram of the three-dimensional structure of the flip mechanism.

[0030] Figure 3 for Figure 1 Schematic diagram of the structure of the second positioning device.

[0031] Figure 4 for Figure 3 Schematic diagram of the structure of the adjustment guide on the right side of the middle.

[0032] In the figure: 1. Linear conveying unit; 2. First image capture device; 3. Bracket; 4. Packing box; 5. Cylinder; 6. Collection box; 7. Second image capture device; 8. Push head; 9. Auxiliary light source; 10. Positioning platform; 11. Push plate; 12. Right positioning guide; 13. Left positioning guide; 14. Horizontal adjustment unit; 15. Longitudinal adjustment unit; 16. First vertical adjustment unit; 17. Second vertical adjustment unit; 18. Clamping head; 19. Flip motor; 20. Encoder; 21. Back plate; 22. Bottom plate; 23. Pressure strip; 24. Right adjustment guide; 25. Left adjustment guide; 26. Receiving platform. DETAILED DESCRIPTION

[0033] The present invention will be further described below with reference to the accompanying drawings, but the present invention is not limited in any way. Any changes or improvements made based on the teachings of the present invention fall within the scope of protection of the present invention.

[0034] like Figures 1 to 4 As shown, the packaging box appearance inspection device provided by this embodiment includes a first positioning device, a first detection device and a flipping mechanism. The flipping mechanism is arranged at the positioning terminal of the first positioning device, and the two work together to complete the clamping of the packaging box 4. When the packaging box 4 to be inspected reaches the positioning terminal of the positioning platform after positioning, the flipping mechanism can clamp and flip its packaging box 4. The detection direction of the first detection device is set facing the flipping position of the flipping mechanism. The first detection device works together with the flipping mechanism to complete the appearance inspection of the packaging box 4. Multiple surfaces of the packaging box 4 can be inspected by one detection device. Compared with the existing solution of setting a detection device for each detection surface, equipment is saved, and the required installation space is smaller, thereby reducing the equipment cost.

[0035] like Figure 1As shown, the first detection device includes a first image capture device 2, an auxiliary light source, and a service processor. The auxiliary light source 9 is directed toward the imaging position of the first image capture device 2. The first image capture device 2 and the service processor are remotely electrically connected. The first image capture device 2 can be positioned at a corresponding position on the flip mechanism, as long as it can capture an image of the packaging box 4 on the clamping head 18 of the flip mechanism. Preferably, the first image capture device 2 is positioned directly above the clamping head 18. The first image capture device 2 is an image acquisition device such as a camera, which is mounted on the bracket 3 and faces the clamping head 18.

[0036] like Figure 1 and Figure 3 As shown, the detection device further includes a second positioning device and a second detection device. The second positioning device is supported at the working end of the flipping mechanism, and the second detection device is arranged at the rear of the second positioning device.

[0037] The detection device further includes a rejection unit, which is arranged at the working rear end of the first detection device or the second detection device. The rejection unit includes a pusher head 8 and a cylinder 5. The pusher head 8 is connected to the telescopic end of the cylinder 5, and the pusher head 8 can be a rejection plate.

[0038] like Figure 2 As shown, the flipping mechanism includes a lateral adjustment unit 14, a longitudinal adjustment unit 15, a first vertical adjustment unit 16, a second vertical adjustment unit 17, and two clamping heads 18. The first vertical adjustment unit 16 and the second vertical adjustment unit 17 are each mounted on the lateral adjustment unit 14 via a slider, which is connected to the driver of the lateral adjustment unit 14. The two clamping heads 18 are each mounted on the first vertical adjustment unit 16 and the second vertical adjustment unit 17 via a slider, one of which is connected to a flipping motor 19 via a rotating shaft. The lateral adjustment unit 14 is mounted perpendicularly to the longitudinal adjustment unit 15 via a slider, which is connected to the driver. Optionally, the driver is a screw structure driven by a drive motor. The driver is a pneumatic cylinder. An encoder 20 is mounted on either the first vertical adjustment unit 16 or the second vertical adjustment unit 17, the encoder 20 having a rotating shaft connected to one of the clamping heads 18. This structure enables three-dimensional position adjustment. This three-dimensional adjustment ensures that the surface to be inspected is always in the focal length of the first inspection device, resulting in a clearer and more complete image.

[0039] like Figure 1As shown, the first positioning device includes a positioning platform 10, a push plate 11, a right positioning guide plate 12, and a left positioning guide plate 13. The right positioning guide plate 12 and the left positioning guide plate 13 are respectively arranged on either side of the positioning platform 10. The push plate 11 is disposed at one end of the positioning platform 10 and is connected to a drive member. The push plate 11 can reciprocate along the positioning platform 10 under the drive of a drive member (e.g., a motor). The right positioning guide plate 12 and the left positioning guide plate 13 are arranged opposite each other and are flexible springs. The two opposing surfaces are bent to reduce damage to the packaging box to be inspected.

[0040] like Figure 3 and Figure 4 As shown, the second positioning device includes a positioning mold box, a left adjustment guide plate 25, and a right adjustment guide plate 24; the positioning mold box is arranged on the slider of the linear conveying unit 1, and the left adjustment guide plate 25 and the right adjustment guide plate 24 are arranged on both sides of the linear conveying unit 1, and a receiving platform 26 is provided on the left adjustment guide plate 25 and the right adjustment guide plate 24, and the receiving platform 26 is arranged at the lower part of the flipping mechanism.

[0041] like Figure 3 As shown, the positioning mold box includes a back plate 21, a bottom plate 22 and a pressure strip 23. The bottom plate 22 is horizontally arranged on the slider on the linear conveying unit 1, the back plate 21 is vertically arranged on the bottom plate 22, and the pressure strip 23 is horizontally arranged on the upper part of the back plate 21. Optionally, the linear conveying unit 1 is driven by a motor to drive the slider to slide back and forth on the screw rod. The left adjustment guide plate 25 and the right adjustment guide plate 24 are arranged on both sides of the linear conveying unit 1, as shown in FIG. Figure 4 As shown, a receiving platform 26 is provided on both the left adjustment guide plate 25 and the right adjustment guide plate 24. The receiving platform 26 receives the working end of the flip mechanism. The above structure can accurately complete the secondary positioning of the packaging box 4, which is convenient for subsequent inspection.

[0042] As an example, the second detection device includes two second image capture devices 7, two auxiliary light sources 9 and a service processor, the auxiliary light sources 9 illuminate the imaging position of the second image capture device 7, the two second image capture devices 7 are remotely electrically connected to the service processor respectively, and the second detection device is arranged on the side of the linear conveying unit 1.

[0043] The packaging box appearance detection method of the present invention comprises the following steps:

[0044] Step (1), positioning the packaging box 4 to be inspected;

[0045] Step (2), clamping the opposite sides of the package box 4 to be inspected after positioning by the clamping head 18, and turning it over by the turning mechanism, and using the first detection device to detect each side that is not clamped in turn during the turning process;

[0046] Step (3) repositions the packaging box 4 inspected in step (2), and performs appearance inspection on the two opposite surfaces that were not inspected in step (2) using a second inspection device, transmits the inspection data to the service processor, and the service processor rejects the packaging box 4 with appearance quality problems.

[0047] The working principle and working method of the present invention are described in detail below by taking the six-side appearance inspection of a cigarette packing box as an example:

[0048] When the detection device of the present invention is working, the packing box of the cigarettes to be detected (hereinafter referred to as the packing box) is regularly positioned on the positioning platform 10 by the left and right positioning guides, and is simultaneously conveyed forward to the conveying end of the positioning platform 10. At this time, the flipping mechanism clamps it, and the longitudinal adjustment unit 15 drives the transverse adjustment unit 14 to move forward under the drive of the motor, thereby driving the first vertical adjustment unit 16 and the second vertical adjustment unit 17 provided on the transverse adjustment unit 14 to move forward, thereby adjusting the flipping mechanism that clamps the packing box forward, and at the same time, The clamping head 18 is set on the first vertical adjustment unit 16 and the second vertical adjustment unit 17 through a slider. It can be adjusted up and down as needed to ensure that it maintains a better position with the first image capture device 2 to facilitate the capture of the image of the packaging box. The up and down adjustment is achieved by sliding the slider on the first vertical adjustment unit 16 and the second vertical adjustment unit 17. The first vertical adjustment unit 16 and the second vertical adjustment unit 17 are both provided with a clamping head 18. The flipping of the clamping head 18 is achieved by a flip motor 19. Usually, one of the surfaces of the packaging box is adjusted to After capturing the image of the surface when facing the first image capture device 2, the image information is uploaded to the service processor, and then the packaging box is turned over in turn to capture the image of each surface and upload it. When the images of all the surfaces to be detected are collected, the packaging box can be dropped onto the linear conveying unit 1 and positioned at the working front end of the positioning mold box by adjusting the slider on the lateral adjustment unit 14. The positioning mold box clamps the packaging box during the forward movement and then transmits it forward. During the transmission process, it is regularized again when it passes through the left adjustment guide 25 and the right adjustment guide 24. After being positioned, the cigarette carton is conveyed to the position of the second image capture device 7. At this time, the second image capture device 7 captures images of the two uninspected clamping surfaces (that is, the two clamped surfaces that were not captured during the image capture process by the first image capture device). This information is then uploaded to the service processor for processing. After the above capture process is completed, the service processor begins to analyze the appearance defects of the packaging box and sends a rejection signal to the cylinder control device to reject the packaging box 4 with appearance defects. The cylinder 5 drives the push head 8 to push the defective packaging box 4 out of the linear conveyor unit 1 and into the collection box 6. The service processor can record the image of the appearance defects of the cigarette carton. When a defect is detected in the appearance of the cigarette carton, the industrial computer automatically saves the defect image, which can be viewed in time to help operators and maintenance personnel control product quality. The equipment can automatically and accurately reject defective cigarette carton. Once a defective cigarette carton is detected, the PLC controller begins counting steps and shifting. When the conditions are met, the PLC controller sends a signal to open the rejection valve to reject the defective cigarette carton. This process performs corresponding inspections on all surfaces of the packaging carton to be inspected, achieving a full appearance inspection of the packaging carton.Of course, during the actual detection process, one or several specific surfaces can be detected, so that the structure of the device can be adjusted or optimized as needed, and the detection and analysis steps can be adjusted accordingly.

[0049] The three-dimensional adjustment method ensures that the surface to be inspected is always at the focal length position of the first inspection device, and the acquired image is clearer and more complete.

[0050] It should be noted that the terms "front / back", "up / down", "left / right", "vertical / horizontal", "up / down", "inside / outside" and the like that may appear in the description of the present invention indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention. In addition, the terms "first", "second" and "third" are only used for descriptive purposes and do not have any order-limiting effect, nor can they be understood as indicating or implying relative importance. For the sake of convenience, the "left", "right", "up" and "down" referred to below are consistent with the left, right, up and down directions of the accompanying drawings themselves, but do not limit the structure of the present invention.

[0051] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the essence and scope of the technical solutions of the present invention.

Claims

1. A packaging box appearance inspection device, characterized by: The invention relates to a method of adjusting the horizontal position of the vehicle body according to claim 1, wherein the adjusting device comprises a first positioning device, a first detection device and a flipping mechanism, wherein the flipping mechanism is arranged at the positioning terminal of the first positioning device, and the detection direction of the first detection device is arranged facing the flipping position of the flipping mechanism; the flipping mechanism comprises a lateral adjustment unit, a longitudinal adjustment unit, a first vertical adjustment unit, a second vertical adjustment unit, a first clamping head and a second clamping head; the first vertical adjustment unit and the second vertical adjustment unit are respectively arranged on the lateral adjustment unit through a first slider and a second slider, the first slider is connected to the first driving member of the lateral adjustment unit, and the second slider is connected to the second driving member of the lateral adjustment unit; the first clamping head is arranged on the first vertical adjustment unit through a third slider, the second clamping head is arranged on the second vertical adjustment unit through a fourth slider, and the first clamping head is connected to the flipping motor through a rotating shaft; the lateral adjustment unit is vertically arranged on the longitudinal adjustment unit through a fifth slider, and the fifth slider is connected to the third driving member; an encoder is arranged on the second vertical adjustment unit, and the rotating shaft of the encoder is connected to the second clamping head; The detection device also includes a second positioning device and a second detection device, the second positioning device is connected to the working end of the lower part of the flipping mechanism, the second detection device is arranged at the rear of the second positioning device, and the second detection device includes a second image capture device; the second positioning device includes a positioning mold box, a left adjustment guide plate, and a right adjustment guide plate; the positioning mold box is arranged on the sixth slide of the linear conveying unit, the left adjustment guide plate and the right adjustment guide plate are arranged on both sides of the linear conveying unit, and the left adjustment guide plate and the right adjustment guide plate are both provided with a receiving platform, and the receiving platform is arranged at the lower part of the flipping mechanism; The positioning mold box includes a back plate, a bottom plate and a pressure strip, the bottom plate is horizontally arranged on the sixth slider on the linear conveying unit, the back plate is vertically arranged on the bottom plate, and the pressure strip is horizontally arranged on the upper part of the back plate; the packaging box is dropped onto the linear conveying unit and is located at the working front end of the positioning mold box. The positioning mold box clamps the packaging box during the forward movement and then conveys it forward. During the conveyance process, it is re-regularly positioned when passing through the left adjustment guide plate and the right adjustment guide plate and is then conveyed to the position of the second image capture device.

2. The packaging box appearance inspection device according to claim 1, characterized in that: The first driving member, the second driving member and the third driving member are screw rod structures, and the screw rods are driven by driving motors.

3. The packaging box appearance inspection device according to claim 1, characterized in that: The first driving member, the second driving member and the third driving member are cylinders. The telescopic end of the cylinder of the first driving member is connected to the first slider, the telescopic end of the cylinder of the second driving member is connected to the second slider, and the telescopic end of the cylinder of the third driving member is connected to the fifth slider.

4. The packaging box appearance inspection device according to claim 1, characterized in that: The first positioning device includes a positioning platform, a push plate, a right positioning guide plate and a left positioning guide plate. The right positioning guide plate and the left positioning guide plate are respectively arranged on both sides of the positioning platform. The push plate is connected to the fourth driving member. The symmetrical center lines of the right positioning guide plate and the left positioning guide plate are in the same direction as the vertical line of the push plate.

5. The packaging box appearance inspection device according to claim 1, characterized in that: The first detection device includes a first image capture device, an auxiliary light source and a service processor. The auxiliary light source illuminates the imaging position of the first image capture device. The first image capture device is electrically connected to the service processor.

6. The packaging box appearance inspection device according to claim 1, characterized in that: The second detection device further includes an auxiliary light source and a service processor, wherein the auxiliary light source is directed toward an imaging position of the second image capture device; The second image capture device is electrically connected to the service processor, and the second detection device is arranged on a side of the linear conveying unit.

7. The packaging box appearance inspection device according to claim 1, characterized in that: The detection device further includes a rejection unit, which is arranged at the working rear end of the first detection device or the second detection device.

8. The packaging box appearance inspection device according to claim 7, characterized in that: The rejecting unit comprises a pusher head and a cylinder, wherein the pusher head is connected to the telescopic end of the cylinder.

9. The packaging box appearance inspection device according to claim 1, characterized in that: The inspection method using packaging box appearance inspection equipment includes the following steps: Step (1), positioning the packaging box to be inspected; Step (2), clamping the opposite sides of the package box to be inspected after positioning by the first clamping head and the second clamping head, and turning it over by the turning mechanism, and performing appearance inspection on each side not clamped in turn by the first inspection device during the turning process; In step (3), the packaging box inspected in step (2) is repositioned, and the two opposite surfaces that have not been inspected in step (2) are inspected for appearance using a second inspection device, and the inspection data is transmitted to the service processor, which removes the packaging boxes with appearance quality problems.

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