A packaging carton printing defect detection apparatus

Abstract

The utility model discloses a kind of packaging carton printing defect detection equipment, it is related to printing manufacturing technical field, including belt conveyor, monitoring identification unit and limiting conveying unit.The utility model has reliable monitoring identification unit, can effectively identify the carton product of printing in conveying line there is defect, and can reduce the speed of conveying line in time after detecting defective product, it is convenient for worker to pick out defective product from product;And with reliable limiting conveying unit, by setting card fender, the carton of conveying is in same straight line, to ensure the accuracy when subsequent defect detection image acquisition, the outward expansion structure of card fender left end can be conveniently placed carton to middle collection, and by reliable linkage mechanism, it can be conveniently adjusted the distance between two card fender, to adapt to different size batch product.

Description

Technical Field

[0001] This utility model relates to the field of printing manufacturing technology, specifically to a packaging carton printing defect detection device. Background Technology

[0002] Cardboard boxes are a commonly used packaging material. They are lightweight and sturdy, easy to transport and stack, and can effectively protect goods from damage caused by collisions and moisture. They also have advantages such as low cost and recyclability. In addition, printing patterns on cardboard boxes can effectively convey brand information, enhance product recognition, and improve the aesthetics of the packaging to attract consumers' attention. The prior art, as disclosed in patent announcement number CN222769079U, discloses an intelligent waste removal device for a packaging carton production line, which includes packaging carton production equipment, a conveyor belt, sensors, a waste removal module, and a waste collection box. The device uses sensors to scan the surface of the cardboard in real time, detects waste or defects, and sends a signal to the waste removal module. The waste removal module quickly locates the waste position based on the signal, activates the waste removal mechanism, removes the waste from the cardboard, and the waste falls into the waste collection box, thereby realizing automatic detection and waste removal of the cardboard. However, although the aforementioned devices have a cleaning module when they detect printed defective products, the existing equipment generally operates at a high speed to ensure efficiency, which makes it difficult for the cleaning mechanism to perform its function. The aforementioned devices cannot guarantee that defective products will be effectively cleaned within a short time interval, and at high conveying speeds, qualified products may be mistakenly removed. In addition, the aforementioned devices cannot ensure the neatness of the carton products during transportation. If a misalignment occurs, it will have an adverse effect on defect identification. Therefore, we propose a packaging carton printing defect detection device. Utility Model Content

[0003] The technical problem this invention aims to solve is to overcome the shortcomings of existing technologies and provide a packaging carton printing defect detection device. This device features a reliable monitoring and identification unit that can effectively identify defective carton products printed on the conveyor line. Upon detecting a defective product, it can promptly reduce the conveyor line speed, facilitating worker removal of the defective product. Furthermore, it has a reliable limiting conveyor unit that, through the setting of cardboard blocks, ensures that the conveyed cartons are on a straight line, thereby guaranteeing the accuracy of subsequent defect detection image acquisition. The outward expansion structure at the left end of the cardboard blocks facilitates the convergence of placed cartons towards the center, and a reliable linkage mechanism allows for easy adjustment of the distance between the two cardboard blocks to accommodate batches of products of different sizes. This effectively solves the problems in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a packaging carton printing defect detection device, comprising a belt conveyor, a monitoring and identification unit, and a limiting conveying unit; The belt conveyor has side baffles fixedly connected to both the front and rear sides. Four support columns are fixedly connected to the lower end of the side baffles. The four support columns are arranged in a rectangular diagonal distribution, and a square foot is fixedly connected to the lower end of each support column. The monitoring and identification unit includes an inspection channel, an industrial camera, a microcomputer, a touch screen, a motor bracket, and a controller. The inspection channel is fixedly connected to the upper middle position of the side baffle. The vertical cross-section of the inspection channel is an inverted U-shaped structure. An industrial camera is embedded in the middle position of the uppermost side of the inspection channel, with the lens end of the industrial camera facing downwards. A microcomputer is installed at the upper end of the inspection channel. A touch screen is installed on the vertical front end of the inspection channel. The drive motor of the belt conveyor is located on the right side of the front side baffle. A controller is installed on the outside of the drive motor. The motor bracket is fixed to the outside of the drive motor and is fixedly connected to the side baffle. The industrial camera, touch screen, and controller are all bidirectionally electrically connected to the microcomputer. The input end of the microcomputer is electrically connected to the output end of an external power supply through an external control switch group. The input end of the belt conveyor drive motor is electrically connected to the output end of an external power supply through the controller. Limiting conveyor unit: installed on the inner and outer sides of the two side baffles.

[0005] The belt conveyor is used to transport printed packaging cartons. Support columns provide structural support, feet enhance stability, and side baffles provide initial blocking. Industrial cameras capture the printed patterns on the cartons passing below, and the data is processed and analyzed in real time by a microcomputer. When the cartons are lined up in a straight line and pass through the inspection channel, the image from the industrial camera remains fixed if the printing is complete. However, if a printing defect is found on a carton, the image captured by the industrial camera will change. Once the microcomputer detects the abnormal image data, it will reduce the belt conveyor's speed via a controller, making it easier for workers to remove the defective cartons from the rear.

[0006] Furthermore, the limiting conveying unit includes a clamping frame, a threaded shaft, and a crank rocker. A clamping frame is installed on the inner side of each side baffle. The clamping frame has a folded structure, and the left ends of both clamping frames open outwards. A threaded shaft is installed on the opposite side of each clamping frame, threadedly connected to the side baffle and perpendicularly pressing against the center of the back of the clamping frame. The other end of the threaded shaft extends outwards and is fixedly connected to a crank rocker at its end. The clamping frames are used to keep the conveyed cartons in a straight line, thereby ensuring the accuracy of subsequent defect detection. The outward expansion structure at the left end of the clamping frame facilitates the convergence of placed cartons towards the center. By cranking the crank rocker, the threaded shaft can be rotated forward and backward, thereby adjusting the distance between the two clamping frames to accommodate batches of products of different sizes.

[0007] Furthermore, the limiting conveying unit also includes connecting blocks, a first cover, a second cover, and a linkage frame. A U-shaped, horizontal linkage frame is slidably connected to each side baffle. The open end of the U-shaped linkage frame is fixedly connected to the back of the side baffle. A circular connecting block is fixedly connected at the point where the threaded shaft connects to the linkage frame and the back of the side baffle. The first cover is fixedly connected to the back of the side baffle, and the second cover is integrally fixedly connected to the middle section of the outer side of the linkage frame. The connecting blocks at both ends of the threaded shaft are rotatably connected to the inside of the first and second covers, respectively. The linkage frame is used to enhance the connection stability between the crank rocker and the locking frame, thereby ensuring that the locking frame can move smoothly when adjusting the spacing. The first cover, by engaging with the connecting block at the inner end of the threaded shaft, can maintain effective linkage between the threaded shaft and the locking frame while allowing the threaded shaft to rotate. The second cover, by engaging with the connecting block at the outer end, can maintain effective linkage between the threaded shaft and the linkage frame while allowing the threaded shaft to rotate.

[0008] Furthermore, the limiting conveying unit also includes a ruler slot and a scale. A ruler slot is provided along the edge of the upper right side of the linkage frame, and a scale is installed inside the ruler slot. The back of the side baffle with the zero mark of the scale is in contact with the scale. The ruler slot is used for installing the scale, which helps workers determine the distance between the current card holder and the side baffle, thus facilitating the adjustment of the distance between the two card holders according to the specifications of the current batch of cartons.

[0009] Furthermore, the limiting conveying unit also includes a bending groove, a support block, a mounting sleeve, a torsion spring, a locking block, and a clearance slot. A clearance slot is provided at the left position of the side baffle, and the front side wall of the clearance slot has a curved structure. A bending groove is provided at the outer corner of the bending section of the locking bracket. A support block is fixedly connected to the back of the left bending section of the locking bracket. A vertical mounting sleeve is fixedly connected to the upper end of the support block. A torsion spring is sleeved on the outer side of the mounting sleeve. A locking block is fixedly connected to the back of both the left and right ends of the locking bracket. The two protruding ends of the torsion spring are respectively fixedly connected to the inside of the two locking blocks. The bending groove allows the two ends of the card holder to bend, and the clearance slot provides displacement space for the left bending section of the card holder. The torsion spring installed on the back of the card holder keeps the left bending section under a cohesive force. This ensures that the end of the card holder fits tightly with the clearance slot when the position of the card holder is adjusted. This allows the angle of the left opening to move when the distance between the two card holders is adjusted, preventing the fixed bending section from causing gaps between its port and the side baffle, which would affect the carton conveying.

[0010] Furthermore, the monitoring and identification unit also includes supplementary lighting. Two strip-shaped supplementary lights are installed at the top downward-facing end of the inspection channel, symmetrically distributed on the left and right sides of the industrial camera. The supplementary lights are used to provide additional illumination to ensure clear images acquired by the industrial camera.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: This packaging carton printing defect detection equipment has the following advantages: 1. Equipped with a reliable monitoring and identification unit, it can effectively identify cardboard boxes with printing defects in the conveyor line and promptly reduce the speed of the conveyor line after detecting defective products, making it easier for workers to pick out the defective products. When the cardboard boxes are lined up in a straight line and pass through the inspection channel, if the printing is complete, the image of the industrial camera is fixed. When a printing defect exists on a certain cardboard box, the image obtained by the industrial camera will change. After the microcomputer detects the abnormal image data, it will reduce the speed of the belt conveyor through the controller, making it easier for workers to remove the cardboard boxes with printing defects from the rear. 2. It has a reliable limiting conveyor unit. By setting the card holder, the conveyed cartons are kept on the same straight line, thereby ensuring the accuracy of subsequent defect detection image acquisition. The outward expansion structure at the left end of the card holder can facilitate the placement of cartons to converge in the middle. And through a reliable linkage mechanism, the distance between the two card holders can be easily adjusted to adapt to batches of products of different sizes. 3. This utility model has a reliable monitoring and identification unit that can effectively identify cardboard box products with printing defects in the conveyor line, and can reduce the speed of the conveyor line in time after detecting defective products, so that workers can pick out the defective products from the products; and has a reliable limiting conveyor unit. By setting up a card holder, the conveyed cardboard boxes are kept on the same straight line, thereby ensuring the accuracy of subsequent defect detection image acquisition. The outward expansion structure at the left end of the card holder can facilitate the placement of cardboard boxes to converge in the middle, and through a reliable linkage mechanism, the distance between the two card holders can be easily adjusted to accommodate batches of products of different sizes. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the upper structure of this utility model; Figure 3 This is a schematic diagram of the lower left side structure of this utility model; Figure 4 This is a schematic diagram of the upper right side structure of this utility model; Figure 5 This is a partial structural schematic diagram of the limiting and conveying unit in this utility model; Figure 6 This utility model Figure 1 Enlarged view of the structure at point A in the middle; Figure 7 This utility model Figure 2 Enlarged view of the structure at point B in the middle.

[0013] In the diagram: 1. Belt conveyor, 2. Side baffle, 3. Monitoring and identification unit, 31. Inspection channel, 32. Industrial camera, 33. Microcomputer, 34. Touch screen, 35. Motor bracket, 36. Controller, 37. Fill light, 4. Limiting conveyor unit, 41. Bracket, 42. Threaded shaft, 43. Connecting block, 44. Cover 1, 45. Cover 2, 46. Crank rocker, 47. Linkage frame, 48. Ruler slot, 49. Scale, 410. Bending groove, 411. Support block, 412. Mounting sleeve, 413. Torsion spring, 414. Block, 415. Clearance slot, 5. Support column, 6. Foot. Detailed Implementation

[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0015] Please see Figures 1-7 This embodiment provides a technical solution: a packaging carton printing defect detection device, including a belt conveyor 1, a monitoring and identification unit 3, and a limiting conveying unit 4; The belt conveyor 1 has side baffles 2 fixedly connected to both the front and rear sides. The lower end of the side baffles 2 is fixedly connected to four support columns 5. The four support columns 5 are arranged diagonally in a rectangle, and the lower end of each support column 5 is fixedly connected to a square foot 6. Monitoring and identification unit 3 includes an inspection channel 31, an industrial camera 32, a microcomputer 33, a touch screen display 34, a motor holder 35, and a controller 36. The inspection channel 31 is fixedly connected to the upper middle position of the side baffle 2. The vertical cross-section of the inspection channel 31 is an inverted U-shape. The industrial camera 32 is embedded in the upper middle position of the inspection channel 31, with its lens facing downwards. The microcomputer 33 is installed at the upper end of the inspection channel 31, and the touch screen display 34 is installed on the front vertical surface of the inspection channel 31. The drive motor of the belt conveyor 1 is located on the right side of the front side baffle 2. A controller 36 is installed on the outside of the drive motor. The motor bracket 35 is fixed on the outside of the drive motor and is fixedly connected to the side baffle 2. The industrial camera 32, the touch screen 34 and the controller 36 are all bidirectionally electrically connected to the microcomputer 33. The input terminal of the microcomputer 33 is electrically connected to the output terminal of the external power supply through the external control switch group. The input terminal of the drive motor of the belt conveyor 1 is electrically connected to the output terminal of the external power supply through the controller 36. Limiting conveying unit 4: installed on the inner and outer sides of the two side baffles 2.

[0016] The belt conveyor 1 is used to transport the printed packaging cartons. The support column 5 supports the equipment, the foot 6 can improve the stability of the equipment placement, the side baffle 2 plays a preliminary blocking role, and the industrial camera 32 is used to capture the printed patterns on the packaging cartons passing below, and the microcomputer 33 processes and analyzes them in real time. When the cartons are lined up in a straight line and pass through the inspection channel 31, if the printing is complete, the image of the industrial camera 32 is fixed. When there is a printing defect on the pattern of a packaging carton, the image captured by the industrial camera 32 will change. After the microcomputer 33 detects the abnormal image data, it will reduce the speed of the belt conveyor 1 through the controller 36, so that the workers can take out the cartons with printing defects from the rear.

[0017] The limiting conveying unit 4 includes a retaining bracket 41, a threaded shaft 42, and a crank rocker arm 46. A retaining bracket 41 is installed on the inner side of each side baffle 2. The retaining bracket 41 has a folded structure, and the left ends of both retaining brackets 41 open outwards. A threaded shaft 42 is installed on the opposite side of each retaining bracket 41. The threaded shaft 42 is threadedly connected to the side baffle 2 and vertically presses against the center of the back of the retaining bracket 41. The other end of the threaded shaft 42 extends outwards and is fixedly connected to the crank rocker arm 46 at its end. The retaining bracket 41 is used to keep the conveyed cartons in a straight line, thereby ensuring the accuracy of subsequent defect detection. The outward expansion structure at the left end of the retaining bracket 41 facilitates the convergence of placed cartons towards the center. By cranking the crank rocker arm 46, the threaded shaft 42 can be rotated forward and backward, thereby adjusting the distance between the two retaining brackets 41 to accommodate batches of products of different sizes.

[0018] The limiting conveying unit 4 also includes a connecting block 43, a first cover 44, a second cover 45, and a linkage frame 47. A U-shaped and horizontal linkage frame 47 is slidably connected to each side baffle 2. The open end of the U-shaped linkage frame 47 is fixedly connected to the back of the side baffle 2. A circular connecting block 43 is fixedly connected at the position where the threaded shaft 42 connects with the linkage frame 47 and the back of the side baffle 2. The first cover 44 is fixedly connected to the back of the side baffle 2. The second cover 45 is integrally fixedly connected to the middle section of the outer side of the linkage frame 47. The connecting blocks 43 at both ends of the threaded shaft 42 are rotatably connected to the inside of the first cover 44 and the second cover 45, respectively. The linkage frame 47 is used to enhance the connection stability between the crank rocker arm 46 and the retaining bracket 41, thereby ensuring that the retaining bracket 41 can move smoothly when adjusting the spacing. The first retaining cover 44 is engaged with the connecting block 43 at the inner end of the threaded shaft 42, which can maintain the effective linkage between the threaded shaft 42 and the retaining bracket 41 while allowing the threaded shaft 42 to rotate. The second retaining cover 45 is engaged with the connecting block 43 at the outer end, which can maintain the effective linkage between the threaded shaft 42 and the linkage frame 47 while allowing the threaded shaft 42 to rotate.

[0019] The limiting conveying unit 4 also includes a ruler slot 48 and a scale 49. A ruler slot 48 is provided along the edge of the upper right side of the linkage frame 47. A scale 49 is installed inside the ruler slot 48, with the back of the side baffle 2 of the scale 49 abutting against it. The ruler slot 48 is used for installing the scale 49, which helps workers determine the distance between the current card holder 41 and the side baffle 2, thus facilitating the adjustment of the distance between the two card holders 41 according to the specifications of the current batch of cartons.

[0020] The limiting conveying unit 4 also includes a bending groove 410, a support block 411, an mounting sleeve rod 412, a torsion spring 413, a locking block 414, and a clearance slot 415. A clearance slot 415 is provided at the left side of the side baffle 2. The front side wall of the clearance slot 415 is a curved structure. A bending groove 410 is provided at the outer corner of the bending section of the locking bracket 41. A support block 411 is fixedly connected to the back of the left bending section of the locking bracket 41. A vertical mounting sleeve rod 412 is fixedly connected to the upper end of the support block 411. A torsion spring 413 is sleeved on the outer side of the mounting sleeve rod 412. A locking block 414 is fixedly connected to the back of both the left and right ends of the locking bracket 41. The two protruding ends of the torsion spring 413 are fixedly connected to the inside of the two locking blocks 414 respectively. The bending groove 410 allows the two ends of the card holder 41 to be bent, and the clearance slot 415 provides displacement space for the left bending section of the card holder 41. The torsion spring 413 installed on the back of the card holder 41 keeps the left bending section always under a cohesive force, so that when the position of the card holder 41 is adjusted, the end of the card holder 41 can be tightly fitted with the clearance slot 415. This allows the angle of the left opening to move when the distance between the two card holders 41 is adjusted, avoiding the gap between the port of the bent section and the side baffle 2 caused by the fixed bending section, which would affect the carton conveying.

[0021] The monitoring and identification unit 3 also includes supplementary lights 37. Two strip-shaped supplementary lights 37 are installed on the top downward end of the inspection channel 31, and the two supplementary lights 37 are symmetrically distributed on the left and right sides of the industrial camera 32. The supplementary lights 37 are used to supplement the lighting to ensure that the image acquired by the industrial camera 32 is clear.

[0022] The working principle of the packaging carton printing defect detection device provided by this utility model is as follows: This device has a reliable monitoring and identification unit 3, which can effectively identify carton products with printing defects in the conveyor line, and can reduce the speed of the conveyor line in time after detecting defective products, so that workers can pick out the defective products from the products: the belt conveyor 1 is used to transport the printed packaging cartons, the support column 5 supports the equipment, the foot seat 6 can improve the stability of the equipment placement, the side baffle 2 plays a preliminary blocking effect, the industrial camera 32 is used to acquire the printed pattern on the packaging cartons passing below, and the microcomputer 33 processes and analyzes it in real time; when the cartons are arranged in a straight line and pass through the inspection channel 31, if the printing is complete, the image of the industrial camera 32 is fixed. When the pattern on a certain packaging carton has a printing defect, the image acquired by the industrial camera 32 will change. After the microcomputer 33 detects the abnormal image data, it will reduce the speed of the belt conveyor 1 through the controller 36, so that workers can take out the defective cartons from the rear; the supplementary light 37 is used to supplement the lighting to ensure that the image acquired by the industrial camera 32 is clear. This equipment also features a reliable limiting conveying unit 4. By setting up a retaining bracket 41, the conveyed cartons are kept on a straight line, ensuring the accuracy of subsequent defect detection image acquisition. The outward expansion structure at the left end of the retaining bracket 41 facilitates the convergence of placed cartons towards the center. Furthermore, a reliable linkage mechanism allows for easy adjustment of the distance between the two retaining brackets 41 to accommodate batches of products of different sizes. By cranking the crank rocker arm 46, the threaded shaft 42 can be rotated forward and backward, thereby adjusting the distance between the two retaining brackets 41. The linkage frame 47 enhances the connection stability between the crank rocker arm 46 and the retaining bracket 41, ensuring smooth movement of the retaining bracket 41 during spacing adjustments. The retaining cover 44 engages with the connecting block 43 at the inner end of the threaded shaft 42, ensuring that the threaded shaft 42 can rotate while maintaining a stable connection. The threaded shaft 42 and the clamping frame 41 are effectively linked; the second clamping cover 45 is engaged with the connecting block 43 at the outer end, which can maintain the effective linkage between the threaded shaft 42 and the linkage frame 47 while allowing the threaded shaft 42 to rotate; the bending groove 410 allows the two ends of the clamping frame 41 to be bent, and the clearance groove 415 provides displacement space for the left bending section of the clamping frame 41. The torsion spring 413 installed on the back of the clamping frame 41 keeps the left bending section always in a cohesive force, so that when the position of the clamping frame 41 is adjusted, the end of the clamping frame 41 can be tightly fitted with the clearance groove 415. Thus, when the distance between the two clamping frames 41 is adjusted, the angle of the left opening can be adjusted accordingly, avoiding the gap between the port and the side baffle 2 caused by the fixed bending section, which would affect the carton conveying.In addition, the ruler slot 48 is used for the installation of the scale 49, which can help workers judge the distance between the current card holder 41 and the side baffle 2, so that workers can adjust the distance between the two card holders 41 according to the specifications of the current batch of cartons.

[0023] It is worth noting that the external control switch group disclosed in the above embodiments controls the microcomputer 33 using methods commonly used in the prior art, and the microcomputer 33 controls the drive motor of the belt conveyor 1 through the controller 36 using methods commonly used in the prior art. The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A packaging carton printing defect detection device, characterized in that: It includes a belt conveyor (1), a monitoring and identification unit (3), and a limit conveying unit (4). The belt conveyor (1) has side baffles (2) fixedly connected to both the front and rear sides. The lower end of the side baffles (2) is fixedly connected to four pillars (5). The four pillars (5) are arranged diagonally in a rectangle, and the lower end of each pillar (5) is fixedly connected to a square foot (6). Monitoring and identification unit (3): includes inspection channel (31), industrial camera (32), microcomputer (33), touch screen (34), motor bracket (35), and controller (36). Inspection channel (31) is fixedly connected to the middle position of the upper end of the side baffle (2). The vertical cross-section of inspection channel (31) is an inverted U-shaped structure. Industrial camera (32) is embedded in the middle position of the uppermost side of inspection channel (31). The lens end of industrial camera (32) faces downward. Microcomputer (33) is installed at the upper end of inspection channel (31). Touch screen is installed on the vertical front end of inspection channel (31). 34), the drive motor of the belt conveyor (1) is located on the right side of the front side baffle (2), and a controller (36) is installed on the outside of the drive motor. The motor bracket (35) is fixed on the outside of the drive motor, and the motor bracket (35) is fixedly connected to the side baffle (2). The industrial camera (32), the touch screen (34) and the controller (36) are all connected to the microcomputer (33) in a bidirectional electrical connection. The input end of the microcomputer (33) is electrically connected to the output end of the external power supply through the external control switch group. The input end of the drive motor of the belt conveyor (1) is electrically connected to the output end of the external power supply through the controller (36). Limiting conveying unit (4): installed on the inner and outer sides of the two side baffles (2).

2. The packaging carton printing defect detection equipment according to claim 1, characterized in that: The limiting conveying unit (4) includes a retaining bracket (41), a threaded shaft (42), and a crank rocker arm (46). A retaining bracket (41) is installed on the inner side of each side baffle (2). The retaining bracket (41) has a folded structure, and the left ends of the two retaining brackets (41) are open outward. A threaded shaft (42) is installed on the opposite side of the retaining bracket (41). The threaded shaft (42) is threadedly connected to the side baffle (2) and is vertically pressed against the middle of the back of the retaining bracket (41). The other end of the threaded shaft (42) extends outward and is fixedly connected to the crank rocker arm (46) at the end.

3. The packaging carton printing defect detection equipment according to claim 1, characterized in that: The limiting conveying unit (4) also includes a connecting block (43), a first cover (44), a second cover (45), and a linkage frame (47). A U-shaped and horizontal linkage frame (47) is slidably connected to each side baffle (2). The open end of the U-shaped linkage frame (47) is fixedly connected to the back of the side baffle (2). A circular connecting block (43) is fixedly connected to the threaded shaft (42) at the position where it connects with the linkage frame (47) and the back of the side baffle (2). The first cover (44) is fixedly connected to the back of the side baffle (2). The second cover (45) is integrally fixedly connected to the middle section of the outer side of the linkage frame (47). The connecting blocks (43) at both ends of the threaded shaft (42) are rotatably connected to the inside of the first cover (44) and the second cover (45), respectively.

4. The packaging carton printing defect detection equipment according to claim 3, characterized in that: The limiting conveying unit (4) also includes a ruler slot (48) and a scale (49). The upper right side of the linkage frame (47) is provided with a ruler slot (48) along the edge. The scale (49) is installed inside the ruler slot (48). The back of the zero scale line side baffle (2) of the scale (49) is in contact with it.

5. The packaging carton printing defect detection equipment according to claim 2, characterized in that: The limiting conveying unit (4) also includes a bending groove (410), a support block (411), an installation sleeve rod (412), a torsion spring (413), a locking block (414), and a clearance slot (415). The clearance slot (415) is provided at the left side of the side baffle (2). The front side wall of the clearance slot (415) is a curved structure. The bending groove (410) is provided at the outer corner of the bending section of the locking bracket (41). The support block (411) is fixedly connected to the back of the left bending section of the locking bracket (41). The upper end of the support block (411) is fixedly connected to the vertical installation sleeve rod (412). The outside of the installation sleeve rod (412) is fitted with a torsion spring (413). A locking block (414) is fixedly connected to the back of both the left and right ends of the locking bracket (41). The two protruding ends of the torsion spring (413) are fixedly connected to the inside of the two locking blocks (414).

6. The packaging carton printing defect detection equipment according to claim 1, characterized in that: The monitoring and identification unit (3) also includes a supplementary light (37). Two strip-shaped supplementary lights (37) are installed on the top of the inspection channel (31) facing downwards. The two supplementary lights (37) are symmetrically distributed on the left and right sides of the industrial camera (32).

Images