Visual inspection device for printing quality inspection

Abstract

The invention discloses a visual detection device for printing quality detection, and relates to the technical field of visual detection. A mounting frame is arranged at the edge of the top of the base through a movable guide rail, and a shooting box with a built-in camera is mounted on the inner walls of the two sides of the mounting frame through a lifting mechanism, a mounting plate, a first oil tank and a first piston rod; the bottom of the first electric push rod is sleeved with a mounting disc in a limiting mode, a mounting base is fixed to the bottom of the mounting disc, and a turnover positioning mechanism is arranged below the mounting base and matched with a turnover mechanism to turn over the packaging box. A fourth piston rod is arranged on the outer side of the moving track of the abutting plate and installed in a fourth oil tank, and the fourth oil tank is connected with the first oil tank through a hose. The visual detection device for printing quality detection can perform multi-surface detection in the transmission process, and is suitable for packaging boxes of different specifications at the same time.

Description

Technical Field

[0001] The present invention relates to the technical field of visual detection, and particularly to a visual detection device for printing quality detection. Background Technique

[0002] Packing boxes are mainly used for packing various commodities to protect the commodities. At the same time, product information and patterns are printed on the packing boxes. In the production and processing of packing boxes, in order to ensure product quality, it is usually necessary to conduct visual inspections on their appearance, defects, and flaws. By using a high-definition camera to take pictures of the surface and cooperating with background image recognition technology, the printing quality on the outside of the packing box can be accurately detected. However, the existing visual detection devices have the following problems when in use: For the visual inspection of packing boxes, most of them need to be inspected on multiple sides to ensure overall integrity. Cooperating with transportation for multi-directional inspection is a conventional means. However, the existing visual detection devices are not convenient for adaptively high-precision inspection of the length and width areas of packing boxes. Since most packing boxes are in a cuboid structure, when conducting inspections, the inspection areas on the front and side are different, and it is not convenient for the camera to adjust its position adaptively, resulting in different proportions of the captured image within the overall graphic. When comparing in the background, it affects the comparison effect. At the same time, the existing visual detection devices are not convenient for conveniently inspecting packing boxes of different specifications. Different specifications have different positions during multi-sided inspection, and the process of targeted adjustment is relatively cumbersome, affecting the continuous inspection efficiency of packing boxes.

[0003] In view of the above problems, there is an urgent need to innovate and design on the basis of the original visual detection device. Summary of the Invention

[0004] The purpose of the present invention is to provide a visual detection device for printing quality detection, so as to solve the problems in the above-mentioned background technique that the existing visual detection device is not convenient for adaptively high-precision inspection of the length and width areas of packing boxes, and at the same time is not convenient for conveniently inspecting packing boxes of different specifications.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A visual detection device for printing quality detection, including a base, an installation frame is arranged on the top edge of the base through a moving guide rail, and a shooting box with an internal camera is installed on the inner walls of both sides of the installation frame through a lifting mechanism, a mounting plate, a first oil tank, and a first piston rod; It also includes a first electric push rod, which is fixed on the inner wall of the top of the mounting frame, a mounting plate is provided on the bottom limit sleeve of the first electric push rod, a mounting seat is fixed on the bottom of the mounting plate, a flip mechanism is provided between the top of the mounting seat and the mounting frame, and a flip positioning mechanism is provided below the mounting seat, and the flip positioning mechanism cooperates with the flip mechanism to flip the packaging box; A contact plate, wherein the contact plate is arranged on the top of the mounting plate through an angle adjustment mechanism, a fourth piston rod is arranged outside the movable track of the contact plate, the fourth piston rod is installed in a fourth oil tank, the fourth oil tank is fixed to the main body of the first electric push rod, and the fourth oil tank is connected to the first oil tank through a hose.

[0006] Preferably, the lifting mechanism includes a lifting screw, which is installed in the cavity of the side wall of the mounting frame through vertical rotation by a motor, and a mounting head with vertical limited movement is provided on the threaded sleeve of the lifting screw, and a mounting plate is fixed to the inner end of the mounting head, and a first oil tank is fixed to the inner end of the mounting plate, a first piston rod is installed in the first oil tank through a spring, and a shooting box is fixed to the inner end of the first piston rod.

[0007] Preferably, the flip positioning mechanism includes a bidirectional screw, which is laterally installed in the bottom cavity of the mounting seat through a motor, and the threaded sleeves at both ends of the bidirectional screw are provided with a second oil tank for transverse limited sliding, the bottom of the second oil tank is connected to a second piston rod through a spring, a positioning plate is fixed to the transverse protrusion at the bottom of the second piston rod, the second oil tank is connected to a third oil tank through a hose, the third oil tank is fixed in the side wall cavity of the mounting frame, a third piston rod is installed in the third oil tank through a spring, and the third piston rod is fixed to the bottom of the mounting head.

[0008] Preferably, the flipping mechanism includes an outer cylinder, which is fixed at the center of the inner wall at the top of the mounting frame, an inner column is slidably arranged inside the outer cylinder, the inner column passes through the mounting plate and is fixed at the top of the mounting seat, a guide head is fixed on the outer side of the inner column, the guide head is located in a guide groove, and the guide groove is opened on the inner wall of the outer cylinder.

[0009] Preferably, the guide head slides in the guide groove, and the guide groove consists of a vertical portion and a spiral portion from top to bottom.

[0010] Preferably, the abutment plate is obliquely distributed, and when the abutment plate rotates with the mounting plate, it pushes the fourth piston rod to move laterally, and two abutment plates are symmetrically arranged on the mounting plate.

[0011] Preferably, the angle adjustment mechanism includes a gear roller, which is fixed at the bottom of the contact plate and embedded in the mounting plate. The outer side of the gear roller is meshed with a gear ring, and the outer side of the gear ring is designed as a worm gear structure meshed with a worm, and the worm is installed through the mounting plate.

[0012] Preferably, the gear roller is installed at the bottom edge of the abutment plate, and the moving direction of the fourth piston rod outside the abutment plate is the same as the moving direction of the first piston rod.

[0013] Preferably, a conveying mechanism is installed on the base, and a front end feeding area on the base is connected to a positioning channel plate via a second electric push rod.

[0014] Compared with the prior art, the present invention has the following beneficial effects: According to the present invention, when performing visual inspection, after the cameras on both sides capture images, the first electric push rod pushes the mounting seat downward, and the guide rod slides in the guide groove, in coordination with the vertical and spiral distribution of the guide groove, the positioning plate can be driven to move downward and perform subsequent rotation, so that the packaging box is automatically turned over, and visual inspection is performed on the other two sides of the packaging box. During this process, the packaging box is transported without stopping, and the base drives the camera to move synchronously, and in coordination with the turning over of the packaging box, multi-sided inspection is achieved. At the same time, the rotation of the inner column can also drive the mounting plate to rotate, and the contact plate contacts the fourth piston rod, in coordination with the conduction of the fourth oil tank and the first oil tank, and the first piston rod drives the shooting box to move, so that when the packaging box is turned over, the shooting box moves synchronously horizontally. When performing visual inspection on the longer side of the packaging box, the distance between the shooting box and the packaging box is adjusted to ensure the optimal shooting image size, thereby improving the inspection efficiency. The present invention can adjust the height of the shooting box by the lifting screw rod for packaging boxes of different heights, so that the camera in the shooting box can take a centered shot of the packaging box, and at the same time, the third piston rod is driven to move by the mounting head, and the conduction of the third oil tank and the second oil tank is coordinated, so that the second piston rod drives the positioning plate to move, and the initial height of the positioning plate is synchronously adjusted according to the height of the packaging box, so that the subsequent first electric push rod only needs to convey a constant stroke, and can cooperate with the law of its downward movement and rotation to drive the packaging boxes of different heights to automatically flip over, and further, according to the different widths and lengths of the packaging boxes, the distance between two adjacent positioning plates is adjusted to perform positioning flipping, and the initial inclination angle of the contact plate is adjusted by rotating the worm gear through the gear ring and the gear roller, so that the position of the shooting box can be synchronously variably adjusted during flipping, and thus, for packaging boxes of different specifications, convenient and efficient shooting operations can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the front cross-section structure of the present invention; Figure 2This is a schematic diagram of the front cross-section structure of the mounting seat of the present invention; Figure 3 For the present invention Figure 1 The enlarged structural diagram at A in the middle; Figure 4 This is a schematic diagram of the expanded structure of the guide groove of the present invention; Figure 5 This is a schematic diagram of the cross-sectional structure of the mounting plate of the present invention when viewed from above; Figure 6 For the present invention Figure 2 Enlarged structural diagram at B in the middle.

[0016] In the figure: 1. base; 2. mounting frame; 31. lifting screw; 32. mounting head; 4. mounting plate; 5. first oil tank; 6. first piston rod; 7. shooting box; 8. first electric push rod; 9. mounting plate; 10. mounting seat; 111. bidirectional screw; 112. second oil tank; 113. second piston rod; 114. positioning plate; 115. third oil tank; 116. third piston rod; 121. outer cylinder; 122. inner column; 123. guide head; 124. guide groove; 13. contact plate; 14. fourth piston rod; 15. fourth oil tank; 161. gear roller; 162. gear ring; 163. worm; 17. second electric push rod; 18. positioning channel plate. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0018] See also Figures 1 - 5 The present invention provides a technical solution: a visual inspection device for printing quality inspection, wherein a mounting frame 2 is arranged at the top edge of a base 1 through a movable guide rail, and a shooting box 7 with a built-in camera is installed on the inner walls of both sides of the mounting frame 2 through a lifting mechanism, a mounting plate 4, a first oil tank 5 and a first piston rod 6; a conveying mechanism is installed on the base 1, and a front feeding area on the base 1 is connected to a positioning channel plate 18 through a second electric push rod 17; According to the width of the packaging box, the position of the positioning channel plate 18 is adjusted by the second electric push rod 17 so that the two positioning channel plates 18 can center the packaging box being transported.

[0019] The lifting mechanism includes a lifting screw rod 31, which is vertically rotatably installed in the cavity on the side wall of the mounting frame 2 by a motor. A mounting head 32 that is vertically limited and movable is sleeved on the lifting screw rod 31 by a thread. A mounting plate 4 is fixed to the inner end of the mounting head 32. A first oil tank 5 is fixed to the inner end of the mounting plate 4. A first piston rod 6 is installed in the first oil tank 5 through a spring. A shooting box 7 is fixed to the inner end of the first piston rod 6; The motor drives the lifting screw rod 31 to rotate, driving the mounting head 32 to move vertically. Then, through the mounting plate 4, the first oil tank 5 and the first piston rod 6, the shooting box 7 is driven to move vertically, ensuring that the camera in the shooting box 7 is at the same position as the middle of the packaging box.

[0020] The first electric push rod 8 is fixed to the inner wall of the top of the mounting frame 2. A mounting disc 9 is sleeved at the bottom of the first electric push rod 8 with a limit. A turning mechanism is provided between the top of the mounting seat 10 and the mounting frame 2. The bottom of the mounting disc 9 is fixed with the mounting seat 10. A turning and positioning mechanism is provided below the mounting seat 10. The turning and positioning mechanism cooperates with the turning mechanism to turn the packaging box; The turning and positioning mechanism includes a bidirectional screw rod 111, which is horizontally installed in the cavity at the bottom of the mounting seat 10 by a motor. Two second oil tanks 112 that are horizontally limited and slidable are sleeved on both ends of the bidirectional screw rod 111 by a thread. The bottom of the second oil tank 112 is connected with a second piston rod 113 through a spring. A positioning plate 114 is fixed to the horizontally protruding part at the bottom of the second piston rod 113. The second oil tank 112 is connected with a third oil tank 115 through a hose. The third oil tank 115 is fixed in the cavity on the side wall of the mounting frame 2. A third piston rod 116 is installed in the third oil tank 115 through a spring. The third piston rod 116 is fixed to the bottom of the mounting head 32; The motor drives the bidirectional screw rod 111 to rotate, adjusting the distance between the two second oil tanks 112, so that the positioning plate 114 at the bottom of the second oil tank 112 corresponds to the position outside the packaging box. The mounting head 32 drives the third piston rod 116 to move in the third oil tank 115. Through the connection between the third oil tank 115 and the second oil tank 112, the second piston rod 113 and the positioning plate 114 are driven to move vertically, and the initial height of the positioning plate 114 is adjusted according to the height of the packaging box.

[0021] The turning mechanism includes an outer cylinder 121, which is fixed to the center of the inner wall of the top of the mounting frame 2. An inner column 122 is slidably arranged in the outer cylinder 121. The inner column 122 passes through the mounting disc 9 and is fixed to the top of the mounting seat 10. A guide head 123 is fixed to the outside of the inner column 122. The guide head 123 is located in a guide groove 124, and the guide groove 124 is opened on the inner wall of the outer cylinder 121; The guide head 123 fits and slides in the guide groove 124, and the guide groove 124 is composed of a vertical part and a spiral part from top to bottom; The first electric push rod 8 drives the mounting plate 9 and the mounting seat 10 to move downward. During this process, the guide head 123 slides in the guide groove 124, driving the mounting plate 9 and the mounting seat 10 to move downward by a certain distance and rotate by 90°, so that the two positioning plates 114 move downward to clamp the packaging box and rotate, thereby flipping the packaging box. Embodiment

[0022] On the basis of Embodiment 1, please refer to Figures 1 - 3 and Figures 5 - 6 , the contact plate 13 is arranged on the top of the mounting plate 9 through an angle adjustment mechanism. A fourth piston rod 14 is arranged on the outer side of the movement track of the contact plate 13. The fourth piston rod 14 is installed in the fourth oil tank 15. The fourth oil tank 15 is fixed on the main body part of the first electric push rod 8. The fourth oil tank 15 is connected to the first oil tank 5 through a hose; the contact plate 13 is obliquely distributed. When the contact plate 13 follows the mounting plate 9 to rotate, it pushes the fourth piston rod 14 to move horizontally. Two contact plates 13 are symmetrically arranged on the mounting plate 9; the angle adjustment mechanism includes a gear roller 161. The gear roller 161 is fixed at the bottom of the contact plate 13. The gear roller 161 is embedded in the mounting plate 9. A gear ring 162 is meshed with the outer side of the gear roller 161. The outer side of the gear ring 162 is designed as a worm gear structure and meshed with a worm 163. The worm 163 penetrates through and is installed in the mounting plate 9; the gear roller 161 is installed at the bottom edge of the contact plate 13. The moving direction of the fourth piston rod 14 on the outer side of the contact plate 13 is the same as the moving direction of the first piston rod 6. According to the length of the packaging box, rotate the worm 163. The worm 163 drives the gear ring 162 to rotate. The gear ring 162 drives the contact plate 13 to deflect through the gear roller 161 to adjust its initial angle. The mounting plate 9 drives the contact plate 13 to rotate. The contact plate 13 contacts the fourth piston rod 14. Through its inclined structure, it drives the fourth piston rod 14 to move, and in cooperation with the connection between the fourth oil tank 15 and the first oil tank 5, the position of the shooting box 7 is adjusted through the first piston rod 6.

[0023] Working principle: First, according to the specifications of the packing box, the whole is adjusted adaptively. According to the width of the packing box, the position of the positioning channel plate 18 is adjusted by the second electric push rod 17, so that the two positioning channel plates 18 center the packing box being conveyed. At the same time, the bidirectional screw 111 is rotated by the motor to adjust the distance between the two second oil tanks 112, so that the bottom positioning plate 114 of the second oil tank 112 corresponds to the outer side position of the packing box. Then, according to the height of the packing box, the lifting screw 31 is driven by the motor to rotate, driving the mounting head 32 to move vertically. Furthermore, the shooting box 7 is driven to move vertically by the mounting plate 4, the first oil tank 5 and the first piston rod 6, ensuring that the camera in the shooting box 7 is at the same position as the middle part of the packing box. The mounting head 32 drives the third piston rod 116 to move in the third oil tank 115. Through the connection between the third oil tank 115 and the second oil tank 112, the second piston rod 113 and the positioning plate 114 are driven to move vertically. According to the height of the packing box, the initial height of the positioning plate 114 is adjusted. At the same time, according to the length of the packing box, the worm 163 is rotated, the worm 163 drives the toothed ring 162 to rotate, and the toothed ring 162 drives the contact plate 13 to deflect through the toothed roller 161 to adjust its initial angle; After the adjustment is completed, the packing box is placed on the conveying mechanism on the base 1 for conveying and centered by the two positioning channel plates 18. In order to know the accurate shooting timing, a laser sensor for detecting the position of the packing box is installed on the base 1. In cooperation with the calculation of the conveying speed of the conveying mechanism, when the center position of the packing box reaches the shooting box 7, it is photographed by the camera and uploaded to the background for image recognition detection. The packing box continues to be conveyed. At this time, the mounting frame 2 is driven to move along with the packing box by the moving guide roller, and the mounting disk 9 and the mounting seat 10 are driven to move down by the first electric push rod 8. During this process, the guide head 123 slides in the guide groove 124, driving the mounting disk 9 and the mounting seat 10 to move down a certain distance and rotate 90°, so that the two positioning plates 114 move down to clamp the packing box and rotate to flip the packing box. The mounting disk 9 drives the contact plate 13 to rotate, and the contact plate 13 contacts the fourth piston rod 14. Through its inclined structure, the fourth piston rod 14 is driven to move. In cooperation with the connection between the fourth oil tank 15 and the first oil tank 5, the position of the shooting box 7 is adjusted by the first piston rod 6 to ensure the size of the side picture of the packing box photographed by the camera in the shooting box 7. After the shooting is completed, each component resets under the action of the motor and the built-in spring, and proceeds to the visual inspection of the next packing box.

[0024] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A visual inspection device for printing quality inspection, comprising a base (1), a mounting frame (2) being arranged at the top edge of the base (1) via a movable guide rail, and a shooting box (7) with a built-in camera being installed on the inner walls of both sides of the mounting frame (2) via a lifting mechanism, a mounting plate (4), a first oil tank (5) and a first piston rod (6); Features: It also comprises a first electric push rod (8), the first electric push rod (8) being fixed on the inner wall at the top of the mounting frame (2), a mounting plate (9) being provided on the limiting sleeve at the bottom of the first electric push rod (8), a mounting seat (10) being fixed at the bottom of the mounting plate (9), a flipping mechanism being provided between the top of the mounting seat (10) and the mounting frame (2), a flipping positioning mechanism being provided below the mounting seat (10), the flipping positioning mechanism cooperating with the flipping mechanism to flip the packaging box; A contact plate (13), the contact plate (13) being arranged on the top of the mounting plate (9) via an angle adjustment mechanism, a fourth piston rod (14) being arranged outside the moving track of the contact plate (13), the fourth piston rod (14) being installed in a fourth oil tank (15), the fourth oil tank (15) being fixed to the main body of the first electric push rod (8), and the fourth oil tank (15) being connected to the first oil tank (5) via a hose.

2. A visual inspection device for printing quality inspection according to claim 1, characterized in that: The lifting mechanism comprises a lifting screw (31), the lifting screw (31) being mounted in a cavity on a side wall of a mounting frame (2) by means of a motor for vertical rotation, a mounting head (32) for vertical limited movement being provided on a threaded sleeve on the lifting screw (31), a mounting plate (4) being fixed to the inner end of the mounting head (32), a first oil tank (5) being fixed to the inner end of the mounting plate (4), a first piston rod (6) being mounted in the first oil tank (5) by means of a spring, and a shooting box (7) being fixed to the inner end of the first piston rod (6).

3. A visual inspection device for printing quality inspection according to claim 2, characterized in that: The flip positioning mechanism comprises a bidirectional screw (111), the bidirectional screw (111) being transversely mounted in a bottom cavity of a mounting seat (10) via a motor, a second oil tank (112) being provided with threaded sleeves at both ends of the bidirectional screw (111) for transverse limited sliding, the bottom of the second oil tank (112) being connected to a second piston rod (113) via a spring, a positioning plate (114) being fixed to a transverse protrusion at the bottom of the second piston rod (113), the second oil tank (112) being connected to a third oil tank (115) via a hose, the third oil tank (115) being fixed in a side wall cavity of the mounting frame (2), a third piston rod (116) being installed in the third oil tank (115) via a spring, and the third piston rod (116) being fixed to the bottom of the mounting head (32).

4. A visual inspection device for printing quality inspection according to claim 3, characterized in that: The flip mechanism comprises an outer cylinder (121), the outer cylinder (121) being fixed at the center of the inner wall at the top of the mounting frame (2), an inner column (122) being slidably arranged inside the outer cylinder (121), the inner column (122) penetrating the mounting plate (9) and being fixed at the top of the mounting seat (10), a guide head (123) being fixed on the outer side of the inner column (122), the guide head (123) being located in a guide groove (124), and the guide groove (124) being formed on the inner wall of the outer cylinder (121).

5. A visual inspection device for printing quality inspection according to claim 4, characterized in that: The guide head (123) fits and slides in the guide groove (124), and the guide groove (124) consists of a vertical portion and a spiral portion from top to bottom.

6. A visual inspection device for printing quality inspection according to claim 5, characterized in that: The abutment plate (13) is distributed obliquely, and when the abutment plate (13) rotates with the mounting plate (9), it pushes the fourth piston rod (14) to move laterally. Two abutment plates (13) are symmetrically arranged on the mounting plate (9).

7. A visual inspection device for printing quality inspection according to claim 6, characterized in that: The angle adjustment mechanism comprises a gear roller (161), the gear roller (161) being fixed to the bottom of the abutment plate (13), the gear roller (161) being embedded in the mounting plate (9), the outer side of the gear roller (161) being meshed with a gear ring (162), the outer side of the gear ring (162) being designed as a worm gear structure meshed with a worm (163), and the worm (163) being installed through the mounting plate (9).

8. A visual inspection device for printing quality inspection according to claim 7, characterized in that: The toothed roller (161) is mounted at the bottom edge of the abutment plate (13), and the moving direction of the fourth piston rod (14) outside the abutment plate (13) is the same as the moving direction of the first piston rod (6).

9. A visual inspection device for printing quality inspection according to claim 8, characterized in that: A conveying mechanism is installed on the base (1), and a front end feeding area on the base (1) is connected to a positioning channel plate (18) via a second electric push rod (17).

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