An automatic detection and rejection device for foreign matter in a cap

Abstract

The present application belongs to the technical field of foreign matter detection, and particularly relates to a device for automatically detecting foreign matter in a cap and automatically removing unqualified products, which comprises a rack, conveying tracks installed on the rack, a foreign matter detection assembly installed between two sections of the conveying tracks and used for collecting image signals inside bottles through an industrial camera; the foreign matter detection assembly comprises a detection box, a support base, a shunt wheel, a bottle-side industrial camera, a bottom industrial camera and a grabbing and transferring assembly; a removal execution mechanism I is installed in the detection box and used for removing unqualified bottles from the shunt wheel; and a removal execution mechanism II is installed on the conveying track on one side of a discharge port of the detection box; through the design of the automatic detection and integrated removal structure, the device automatically detects foreign matter in bottles (the cap and the container are connected with each other), inverted containers and caps, and fundamentally solves the problem of manual missed detection.

Description

Technical Field

[0001] This invention belongs to the field of foreign object detection technology, and in particular relates to an automatic foreign object detection and automatic rejection device for defective products inside a lid. Background Technology

[0002] In the food processing industry, the hygiene of lids and containers used for canned food is of utmost importance. Dust, black spots, fibers, oil, debris, hair and other foreign matter can easily remain inside the lids and containers, which directly affect the product's hygiene standards. When inspecting for foreign objects inside lids and containers, most methods involve separating the two and then conducting manual visual inspections. This traditional inspection method has many technical shortcomings and industry pain points: On the one hand, subjective factors such as the tester's physical condition, fatigue level, and work focus have a great impact, which can easily lead to missed or incorrect detection of foreign objects, potentially causing quality problems. On the other hand, manual inspection lacks unified and quantifiable inspection standards, and there are significant differences in judgment among different people, making it difficult to meet the quality control requirements of industrialized mass production. At the same time, manual inspection is inefficient, labor costs are high, and it cannot keep up with the operating rhythm of high-speed automated production lines, thus restricting the improvement of production efficiency. Summary of the Invention

[0003] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention relates to an automatic foreign object detection and defective product rejection device, comprising a frame and a conveyor track mounted on the frame, and further comprising: The foreign object detection component is installed between the two conveyor tracks and uses an industrial camera to collect image signals from inside the bottle. The foreign object detection component includes a detection box, a support chassis, a diversion wheel, a bottle-side industrial camera, a bottom industrial camera, and a gripping and transfer component. The inspection box is installed between two conveyor tracks, and has an inlet and an outlet. Inside the inspection box is a support chassis that lifts and supports the bottles to be inspected. Above the support chassis is a diversion wheel that rotatably divides the bottles in a circular manner. Inside the inspection box, a bottle-side industrial camera is installed via a backlight lifting assembly to perform height scanning of foreign objects inside the bottles. A bottom industrial camera is installed on the support chassis to capture images of foreign objects inside the bottom of the bottles. Inside the inspection box is a gripping and transferring assembly that grips and transfers the bottles to be inspected on the conveyor track to the diversion wheel, and simultaneously grips and transfers the inspected bottles to the other side of the conveyor track. And a rejection actuator, which is installed inside the detection box and is used to reject unqualified bottles and containers from the diversion wheel.

[0004] Further specified, the diverter wheel has a plurality of bottle-shaped grooves arranged in a circular array, and flexible blocks are installed in the bottle-shaped grooves. Multiple segmented arc-shaped baffles are installed in the detection box at corresponding positions on the outer ring of the diverter wheel.

[0005] More specifically, the backlight lifting assembly includes a backlight panel, a first lead screw, a lead screw slider, and a mounting bracket; The two backlight panels are respectively installed between the support chassis and the flow distribution wheel, and between the flow distribution wheel and the top of the detection box. Light sources are evenly installed on the backlight panels. A first lead screw is vertically rotatably installed inside the detection box. A lead screw slider is connected to the first lead screw through a ball nut. A mounting bracket for mounting a bottle-side industrial camera is fixed on one side of the lead screw slider. The lens of the bottle-side industrial camera corresponds to the backlight panel.

[0006] More specifically, the support chassis has mounting slots, and a transparent backlight ring is installed in the mounting slots, with a light source installed inside the backlight ring. The lens of the bottom industrial camera is installed inside the backlight ring.

[0007] More specifically, the gripping and transferring assembly includes a support block, a second lead screw, a guide slider, a vertical strip, a third lead screw, a first long rod, a second long rod, an air duct, and a suction cup; The top of the testing box is rotatably mounted with a second lead screw for driving the guide slider to slide via symmetrical support blocks. The second lead screw is connected to the guide slider via ball nuts. The bottom of the guide slider moves through a movable guide groove opened on the top of the testing box and is connected to a vertical strip. The vertical strip has a lifting groove for the rotation of a third lead screw. The third lead screw is connected to a first long rod and a second long rod via two ball nuts. The ends of the first long rod and the second long rod that are far apart from each other are equipped with suction cups via air guide pipes.

[0008] Further specified, the length of the second long rod is greater than the length of the first long rod, and the second long rod includes a bottom support block, a swing support rod, and a gear assembly. The bottom support block is located below the first long rod, and the swing support rod is rotatably mounted on the upper surface of the bottom support block. One of the air guide pipes is rotatably mounted on the end of the swing support rod through a bearing, and the air guide pipe is connected to the output shaft of a servo motor fixedly mounted on the swing support rod through the gear assembly.

[0009] Further specified, the air guide tube on the first long rod is slidably installed, and a support ring is fixedly installed on the air guide tube. The support ring is connected to the first long rod by a spring member, and the air guide tube is provided with a limiting protrusion for limiting its sliding.

[0010] Further specified, the rejection actuator includes a limiting block, a discharge guide pipe, and a buffer pad. The supporting chassis has a discharge guide groove, and the limiting block is rotatably installed at the opening of the discharge guide groove by a torsion spring. The upper surface of the limiting block is flush with the upper surface of the supporting chassis. The detection box is fixed with a discharge guide pipe, and the upper opening of the discharge guide pipe is aligned with the discharge guide groove. Its lower opening extends outside the detection box. The side of the lower opening of the discharge guide pipe has a discharge groove, and a buffer pad is installed at the lower opening.

[0011] Further specified, it also includes a rejection actuator two, which is installed on the conveying track on the discharge port side of the inspection box and is used to reject unqualified covers. The rejection actuator two includes a rejection telescopic rod installed on the frame side of the conveying track and a push plate installed on the output rod end of the rejection telescopic rod.

[0012] The present invention has the following beneficial effects: This invention utilizes a combination of a bottle-side industrial camera, a bottom industrial camera, and a diversion wheel installed inside the inspection chamber. The diversion wheel sequentially diverts the bottles to be inspected (including the cap and the accompanying container) to the bottle-side sampling station and the bottom sampling station. This allows the lens of the bottle-side industrial camera to effectively scan the entire height of the bottle, enabling it to capture foreign objects adhering to the surface of the bottle body (container). Meanwhile, the bottom industrial camera effectively scans the bottom inside the cap and the bottom inside the bottle body for foreign objects adhering to them. The present invention is equipped with a rejection actuator 1 inside the detection box and a rejection actuator 2 on the right side conveyor track. The rejection actuator 1 can directly reject bottles and inverted containers that fail the test from the detection box, while the caps that fail the test will be transferred to the right side conveyor track first, and then rejected separately by the rejection actuator 2. In summary, this invention, through automated detection and integrated rejection structure design, achieves automatic foreign object detection for bottles (with caps and containers connected), inverted containers, and caps, thereby replacing manual inspection work. It realizes standardized, precise, and automated foreign object detection in bottles, containers, and caps, fundamentally solving the problem of missed detections due to manual methods and completely eliminating the problems of missed or incorrect detections caused by subjective human factors. This significantly improves detection accuracy and ensures product quality. Furthermore, it eliminates the need for manual operation, improves detection efficiency, is compatible with high-speed automated production lines, and reduces labor costs.

[0013] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present invention; Figure 2 This is a schematic diagram of the internal structure of the detection box according to an embodiment of the present invention; Figure 3 This is a diagram showing the interaction between the bottle and the flow divider in an embodiment of the present invention. Figure 4 This is a diagram showing the interaction between the supporting chassis and the distribution wheel in an embodiment of the present invention. Figure 5 This is a schematic diagram of the structure of the flow-diverting wheel according to an embodiment of the present invention; Figure 6 This is a schematic diagram of the structure of the grasping and transferring component according to an embodiment of the present invention; Figure 7 The present invention discloses an embodiment of the invention. Figure 6 Enlarged view of a portion of point A in the middle.

[0016] In the diagram: 1. Frame; 2. Conveyor track; 3. Foreign object detection component; 31. Detection box; 32. Support chassis; 321. Unloading guide chute; 33. Diverting wheel; 331. Bottle body groove; 34. Flexible block; 35. Bottle side industrial camera; 36. Bottom industrial camera; 37. Arc-shaped baffle; 38. Backlight ring; 4. Backlight lifting component; 41. Backlight panel; 42. First lead screw; 43. Lead screw slider; 44. Mounting bracket; 5. Grabbing and transferring component; 51. Support block; 52. 53. Second lead screw; 54. Guide slider; 55. Vertical strip; 56. Third lead screw; 57. First long rod; 58. Support ring; 59. Spring component; 50. Limiting protrusion; 51. Second long rod; 52. Bottom support block; 53. Swinging support rod; 54. Gear assembly; 55. Air guide pipe; 66. Suction cup; 77. Removal actuator one; 88. Limiting support block; 99. Unloading guide pipe; 100. Buffer pad; 11. Removal actuator two; 12. Removal telescopic rod; 13. Push plate. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around", etc., which indicate orientation or positional relationship, are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting this invention. Example

[0019] Please see Figures 1-7 As shown, an automatic foreign object detection and non-conforming product rejection device for bottles includes a frame 1 and a conveyor track 2 mounted on the frame 1, and further includes: Foreign object detection component 3 is installed between the two sections of conveyor track 2 and is used by an industrial camera to collect image signals inside the bottle; The foreign object detection component 3 includes a detection box 31, a support chassis 32, a diversion wheel 33, a bottle-side industrial camera 35, a bottom industrial camera 36, ​​and a gripping and transferring component 5; The detection box 31 is installed between two sections of conveying rails 2, and the detection box 31 has an inlet and an outlet. The detection box 31 is equipped with a support base 32 for supporting the bottles to be tested. A diversion wheel 33 for circumferentially diverting the bottles is rotatably installed above the support base 32. The detection box 31 is equipped with a bottle-side industrial camera 35 for scanning foreign objects inside the bottles through a backlight lifting assembly 4. The bottom industrial camera 36 is installed on the support base 32 for image acquisition of foreign objects inside the bottle bottom. The detection box 31 is equipped with a gripping and transferring assembly 5, which is used to grip and transfer the bottles to be tested on the conveying rails 2 to the diversion wheel 33, and simultaneously grip and transfer the tested bottles to the other side of the conveying rails 2. And a rejection actuator 6, which is installed in the detection box 31 and is used to reject unqualified bottles from the diversion wheel 33; It should be noted that the two sets of conveyor tracks 2 are installed on the left and right sides of the detection box 31, while the control box is located next to one of the conveyor tracks 2. It is connected to the foreign object detection component 3 and the rejection actuator 6 by means of electrical signal connection. The industrial camera adopts a high frame rate high-definition camera and is equipped with a professional optical lens. There is a certain distance between the support base 32 and the diversion wheel 33. The size of the support base 32 is similar to that of the diversion wheel 33. Preferably, the bottle side industrial camera 35 can be installed on the rear side of the discharge port and aligned with one of the bottle body grooves 331. The bottom industrial camera 36 is installed on the support base 32 corresponding to the inlet. The support base 32 is equipped with a servo motor that drives the diversion wheel 33 to rotate. Specifically, before foreign object detection is required on the cap and its accompanying container, the cap can be twisted onto the accompanying container to form the bottle to be tested. Then, the operator starts the left and right conveyor tracks 2 using the electronic control buttons on the control box. The operator then places the bottles to be tested sequentially onto the conveyor track 2 on the left side of the detection box 31. The movable and adjustable baffles on the conveyor track 2 can limit the forward and backward movement of the bottles. At this time, the conveyor track 2 will transport the stacked bottles sequentially to the right to the detection box. At the feed inlet of box 31, elastic blocking strips are installed at the ends of the front and rear baffles at the feed inlet. The symmetrical elastic blocking strips can block the conveyed bottles at the feed inlet. When the diverting wheel 33 rotates and the bottle groove 331 it opens is aligned with the feed inlet, the gripping and transferring component 5 will move the bottle blocked by the symmetrical elastic blocking strips into the bottle groove 331. The bottom of the bottle will be placed on the support base 32. As the diverting wheel 33 continues to rotate, the other empty bottle grooves 331 will rotate to be aligned with the feed inlet. When the bottle-containing groove 331 rotates to the bottle-side collection station, the bottle-side industrial camera 35 will adjust its height through the backlight lifting component 4, so that the lens of the bottle-side industrial camera 35 can effectively scan the entire height of the bottle and capture foreign objects adhering to the surface of the bottle body (container). After the bottle-side industrial camera 35 completes image acquisition, the diversion wheel 33 will continue to rotate and move the bottle at this station to the bottom collection station. At this time, the bottom industrial camera 36 will effectively scan the foreign objects adhering to the bottom inside the cap and the bottom inside the bottle body. This prevents the bottle-side industrial camera 35 from only being able to shoot the bottle body and the outer side of the cap, but not being able to scan the inner surface of the cap for foreign objects, and is prone to creating blind spots, which will affect the accuracy of automatic detection of foreign objects adhering to the inner surface of the cap. Then, the control module inside the control box stores a unified foreign object detection and judgment program, which is used to receive detection signals and perform combined analysis. When a bottle is judged to be qualified (both the cap and container meet the hygiene standards), the gripping and transfer component 5 will transfer the qualified bottle from the discharge port of the detection box 31 to the right conveying track 2 for conveying. When a bottle is judged to be unqualified (one or both of the cap and container do not meet the hygiene standards), a rejection command is sent immediately. At this time, the rotation of the diversion wheel 33 will continue to move the unqualified bottle to the rejection station. At this time, the rejection execution mechanism 6 at the rejection station will remove the unqualified bottle from the diversion wheel 33, completing the automatic separation of the unqualified bottle. When a container needs to be inspected individually, it can be placed upside down (with the opening facing down) on the left conveyor track 2. The conveyor track 2 will then transport the upside-down containers to the inspection box 31. At this time, the gripping and transfer component 5 will place the containers to be inspected onto the diversion wheel 33, and then transfer them to the bottle-side industrial camera 35 and the bottom industrial camera 36 for foreign object detection. Containers that pass the inspection will be transferred to the right conveyor track 2 by the gripping and transfer component 5, while unqualified containers will be rejected by the rejection actuator 6.

[0020] In a preferred embodiment of the present invention, a plurality of bottle body grooves 331 are arranged in a circular array on the diversion wheel 33, and flexible blocks 34 are installed in the bottle body grooves 331. A plurality of segmented arc-shaped baffles 37 are installed in the detection box 31 and at the corresponding position on the outer ring of the diversion wheel 33. Specifically, the "C"-shaped flexible block 34 is made of silicone rubber and can buffer and protect the bottles that move into the bottle body groove 331, preventing the bottles, especially glass bottles, from colliding with the diverter wheel 33 and breaking when they move into the bottle body groove 331. At the same time, the flexible block 34 is installed in a detachable manner, which can change the size of the bottle body groove 331 and thus adapt to the detection of bottles of different sizes. However, it should be noted that the largest bottle size to be detected must be smaller than the size of the bottle body groove 331. The arc-shaped baffle 37 is movably mounted on the wall of the detection box 31 by means of a spring and an adjusting screw. When the bottle moves between the diverter wheel 33 and the arc-shaped baffle 37, the arc-shaped baffle 37 can not only radially limit the bottle and prevent it from falling off the diverter wheel 33, but also protect the bottle. The curved baffles 37 located on both sides of the discharge port have elastic rubber strips at their close ends, and the distance between the close ends of the curved baffles 37 is smaller than the size of the bottle to be inspected. This design not only allows the bottle located at the bottle side collection station to be stably and safely transferred to the bottom collection station by the obstruction of the curved baffles 37, but also, when a qualified bottle needs to be transferred from the bottom collection station to the right conveyor track 2, the bottle will open the corresponding close elastic rubber strip when the gripping and transferring component 5 moves the bottle, so as to safely transfer the qualified bottle to the conveyor track 2. When the bottle is removed, the corresponding elastic rubber strip will close again to limit and block the bottle at the bottom collection station.

[0021] In a preferred embodiment of the present invention, the backlight lifting assembly 4 includes a backlight plate 41, a first lead screw 42, a lead screw slider 43, and a mounting bracket 44. The two backlight panels 41 are respectively installed between the support base 32 and the flow distribution wheel 33 and between the flow distribution wheel 33 and the top of the detection box 31. Light sources are evenly installed on the backlight panels 41. A first lead screw 42 is vertically rotatably installed inside the detection box 31. A lead screw slider 43 is connected to the first lead screw 42 through a ball nut. A mounting bracket 44 for mounting a bottle-side industrial camera 35 is fixed on one side of the lead screw slider 43. The lens of the bottle-side industrial camera 35 corresponds to the backlight panel 41. Specifically, the first lead screw 42 is vertically rotated inside the inspection box 31 through the cooperation of bearings and bearing seats, and a servo motor that drives the first lead screw 42 to rotate is fixedly installed at the bottom of the inspection box 31. The bottle-side industrial camera 35 is installed on the mounting bracket 44 with bolts and fasteners. The backlight plate 41 is arc-shaped and matches the size of the bottle to be inspected. Therefore, when the bottle is moved to the bottle-side acquisition station, the servo motor at the bottom of the detection box 31 will drive the first lead screw 42 to rotate, which in turn causes the lead screw slider 43 and the mounting bracket 44 to move the bottle-side industrial camera 35 up and down. This can adjust the lens height of the bottle-side industrial camera 35 and also enable it to take pictures of foreign objects inside the bottle from a height perspective while in the lifting and lowering motion.

[0022] In a preferred embodiment of the present invention, the support chassis 32 is provided with a mounting slot, and a backlight ring 38 made of transparent material is installed in the mounting slot, and a light source is installed in the backlight ring 38. The lens of the bottom industrial camera 36 is installed in the backlight ring 38. Specifically, the backlight ring 38 is made of transparent glass and is flush with the upper surface of the support base 32. Therefore, when the distribution wheel 33 drives the bottle to rotate to the mounting slot position, the bottom of the bottle will be in contact with the backlight ring 38. As a result, the light source in the backlight ring 38 will not only illuminate the bottom of the bottle, but also diffuse through the bottom of the bottle to the inner surface of the cap. This allows the bottom industrial camera 36 to more accurately and effectively scan the foreign objects adhering to the bottom of the bottle and the inner surface of the cap.

[0023] In a preferred embodiment of the present invention, the gripping and transferring component 5 includes a support block 51, a second lead screw 52, ​​a guide slider 53, a vertical strip 54, a third lead screw 55, a first long rod 56, a second long rod 57, an air duct 58, and a suction cup 59. The top of the detection box 31 is rotatably mounted with a second lead screw 52 for driving the guide slider 53 to slide via symmetrical support blocks 51. The second lead screw 52 is connected to the guide slider 53 via ball nuts. The bottom of the guide slider 53 moves through a movable guide groove opened at the top of the detection box 31 and is connected to a vertical strip 54. The vertical strip 54 is provided with a lifting groove for the third lead screw 55 to rotate. The third lead screw 55 is connected to a first long rod 56 and a second long rod 57 via two ball nuts. The ends of the first long rod 56 and the second long rod 57 that are far apart from each other are both equipped with suction cups 59 through air pipes 58. It should be noted that the second lead screw 52 is rotatably mounted on the support block 51 through bearings at both ends. The left and right symmetrical support blocks 51 are located on the upper surface of the detection box 31, and a servo motor is fixed on one of the support blocks 51. The vertical strip 54 is located inside the detection box 31, and its bottom extends downward to the top of the diverter wheel 33. The third lead screw 55 is rotatably mounted in the moving guide groove through bearings at both ends, and a servo motor that drives the third lead screw 55 to rotate is fixed at the bottom of the vertical strip 54. The first long rod 56 extends towards the inlet of the detection box 31, and the second long rod 57 extends towards the outlet of the detection box 31. The two air guide pipes 58 are connected to the external air pump unit through two independent diverter pipes. The distance between the two suction cups 59 matches the distance between the bottle at the inlet and the bottle corresponding to the bottom industrial camera 36. Specifically, when it is necessary to transfer the bottles at the inlet of the inspection box 31 to the aligned bottle grooves 331, and to transfer the qualified bottles from the outlet to the right-side conveyor track 2, the second lead screw 52 can be rotated first, causing it to drive the vertical strip 54, the first long rod 56, and the second long rod 57 to move to the left within the inspection box 31 via the guide slider 53. This allows the two suction cups 59 to accurately move above the bottles at the inlet and the backlight ring 38. Then, the third lead screw 55 is controlled to rotate, causing the first long rod 56 and the second long rod 57 to move to the left within the inspection box 31. The box 31 moves downward, causing the two suction cups 59 to descend and contact the upper cap of the bottle. Then, the air pump unit works, and the suction force generated by the diversion pipe and air guide pipe 58 acts on the suction cups 59, which facilitates the adsorption and fixation of the bottle with the suction cups 59. Then, the second lead screw 52 is controlled to rotate in the opposite direction, causing the vertical strip 54 to move towards the discharge port. At this time, the bottle located at the inlet will be moved horizontally into the aligned bottle groove 331, while the bottle located in the other bottle groove 331 that has passed the inspection will be moved horizontally onto the conveyor track 2 at the discharge port. Once the bottles have been transferred, the suction cup 59 detaches from the bottle and the first long rod 56 and the second long rod 57 move upwards, causing the suction cup 59 to detach from the bottle cap. Then, as needed, the first long rod 56 and the second long rod 57 can be driven to move to the left inside the detection box 31, so that the two suction cups 59 continue to be suspended above the undetected and the detected and qualified bottles, making it easier to grab and transfer the bottles again. Furthermore, the present invention uses the gripping and transferring component 5 installed on the detection box 31 to transfer undetected bottles from the feed inlet to the diversion wheel 33, and simultaneously transfer qualified bottles from the diversion wheel 33 to the conveying track 2 at the discharge outlet, so as to realize the automatic replacement and adjustment of detected and undetected bottles. It should be further explained that when the first long rod 56 and the second long rod 57 descend to the lowest point in the moving guide groove, the lower surface of the suction cup 59 is in contact with the upper surface of the diverter wheel 33.

[0024] In a preferred embodiment of the present invention, the length of the second long rod 57 is greater than the length of the first long rod 56, and the second long rod 57 includes a bottom support block 571, a swing support rod 572 and a gear assembly 573. The bottom support block 571 is located below the first long rod 56, and the swing support rod 572 is rotatably mounted on the upper surface of the bottom support block 571. One of the air guide pipes 58 is rotatably mounted on the end of the swing support rod 572 through a bearing, and the air guide pipe 58 is connected to the output shaft of a servo motor fixedly mounted on the swing support rod 572 through the gear assembly 573. It should be noted that the distance from the rotation center point of the swing support rod 572 to the center point of the end suction cup 59 is similar to the diameter of the flow divider 33. A swing motor for driving the swing support rod 572 to rotate horizontally is fixed below the bottom support block 571, so that the output shaft of the swing motor rotates through the bottom support block 571 and connects to the swing support rod 572. The air guide pipe 58 is connected to one of the gears of the gear assembly 573, while the output shaft of the servo motor fixed on the swing support rod 572 is connected to the other gear. Specifically, when the suction cup 59 at the end of the first long rod 56 is located at the bottle at the inlet, the suction cup 59 at the end of the swing support rod 572 is also located above the bottle placed in the bottle groove 331. At this time, the output shaft of the swing motor is aligned with the axial axis of the diverter wheel 33. Therefore, when the bottle is image-acquiring at the bottle-side acquisition station, the control system can control the swing motor to drive the swing support rod 572 to rotate counterclockwise on the bottom support block 571, and the suction cup 59 at the end of the swing support rod 572 rotates to the bottle-side acquisition station. Above the bottle at the collection station, the third lead screw 55 is controlled to rotate, causing the swing support rod 572 to drive the suction cup 59 to descend onto the corresponding bottle, so that the suction cup 59 adsorbs and fixes the bottle at the bottle side collection station. Then, the servo motor fixed on the swing support rod 572 is driven to work, so that it drives the air guide tube 58 to rotate through the gear assembly 573, thereby enabling the bottle adsorbed by the suction cup 59 to rotate at the bottle side collection station. By rotating the bottle, the bottle side industrial camera 35 can perform an all-round scan and collection of the bottle body. After the bottle is inspected at the bottle side collection station, the suction cup 59 can be controlled to detach from the bottle and fix it. Then, the swing support rod 572 is rotated to be flush with the first long rod 56. The swing support rod 572 can then be lowered vertically, and the suction cup 59 can be attached to the bottle at the bottom collection station. The rotation of the suction cup 59 can drive the bottle that is being inspected on the bottom and inner surface of the cap to rotate, so that the bottom industrial camera 36 can more effectively collect foreign objects adhering to the inner surface of the cap and the bottom of the bottle. When the suction cup 59 on the swing support rod 572 is attached to the qualified bottle, the suction cup 59 at the end of the first long rod 56 is also attached to the bottle at the feed port. Then, by rotating the second screw 52, ​​the untested bottle can be transferred to the bottle groove 331, while the tested and qualified bottle will be transferred to the conveying track 2. It should be noted again that displacement sensors or laser sensors are installed at the ends of the first long rod 56 and the swing support rod 572 so that the suction cup 59 can be accurately moved to the top of the bottle. The diversion pipe connected to the corresponding air guide tube 58 on the gear assembly 573 is made of flexible tubing so that it will not interfere with the normal rotation of the suction cup 59. The swinging rod 572 operates intermittently during its counterclockwise, clockwise, and horizontal swinging motions on the bottom support block 571. In other words, when the swinging rod 572 is in a horizontal position and drives the bottle corresponding to the bottom industrial camera 36 to rotate in order to transfer the qualified bottle, the bottle corresponding to the bottle-side industrial camera 35 is also being processed normally. When the swinging rod 572 swings to the bottle corresponding to the bottle-side industrial camera 35 and causes the bottle to rotate, the bottle corresponding to the bottom industrial camera 36 is also being processed normally.

[0025] In a preferred embodiment of the present invention, the air guide tube 58 on the first long rod 56 is slidably installed, and a support ring 561 is fixedly installed on the air guide tube 58. The support ring 561 and the first long rod 56 are connected by a spring member 562. The air guide tube 58 is provided with a limiting protrusion 563 for limiting its sliding. It should be noted that at least two limiting protrusions 563 are fixed on the air guide tube 58 and located on the upper surface of the first long rod 56, while the support ring 561 and the spring can be located above the first long rod 56. Therefore, when the defective bottle rotates with the diverting wheel 33 to the rejection station, the swing rod 572 rotates clockwise to the top of the defective bottle, and the suction cup 59 adsorbs and fixes it. Then, the third lead screw 55 is controlled to rotate, so that the first long rod 56 and the second long rod 57 continue to descend synchronously. At this time, the descent of the first long rod 56 will first cause the suction cup 59 at its end to adhere to the uninspected bottle, while the swing rod 572 rotates clockwise to the top of the defective bottle. The suction cup 59 on the moving support rod 572 will adhere to the defective bottle. As the first long rod 56 and the swing support rod 572 continue to descend, the air guide tube 58 at the end of the first long rod 56 will move upward relative to it, so that the limiting protrusion 563 will disengage from the upper surface of the first long rod 56. The spring 562 will be stretched. At this time, the descent of the swing support rod 572 will push the defective bottle down through the suction cup 59 (the suction cup 59 does not adhere to and fix the bottle), opening the rejection actuator 6, thus facilitating the rejection of the defective bottle from the support base 32 and the detection box 31. When the first long rod 56 and the swing support rod 572 rise, the elastic restoring force of the spring 562 above the first long rod 56 will cause the air guide tube 58 to move downwards. When the limiting protrusion 563 on the air guide tube 58 abuts against the first long rod 56, the air guide tube 58 will stop moving, so that the suction cup 59 at the end of the first long rod 56 and the suction cup 59 at the end of the swing support rod 572 are in a flush state, which makes it easier for the two suction cups 59 to adsorb and transfer the bottle.

[0026] In a preferred embodiment of the present invention, the rejection actuator 6 includes a limiting block 61, a discharge guide 62, and a buffer pad 63. The supporting chassis 32 is provided with a discharge guide groove 321, and the limiting block 61 is rotatably installed at the groove opening of the discharge guide groove 321 by a torsion spring. The upper surface of the limiting block 61 is flush with the upper surface of the supporting chassis 32. The discharge guide 62 is fixed on the detection box 31, and the upper opening of the discharge guide 62 is aligned with the discharge guide groove 321. The lower opening of the discharge guide 62 extends outside the detection box 31. A discharge groove is provided on the side of the lower opening of the discharge guide 62, and a buffer pad 63 is installed at the lower opening. It should be noted that the size of the unloading guide 321 is larger than the size of the bottle to be tested, at least two limit blocks 61 are installed, and the unloading guide 62 is equipped with a push telescopic rod on the side wall of the discharge chute. The telescopic rod can be a cylinder or an electric telescopic rod. When the diverting wheel 33 rotates the defective bottle to the unloading guide 321, multiple limiting blocks 61 will provide gravity support for the defective bottle. When the swinging rod 572 presses down on the defective bottle through the suction cup 59, the limiting blocks 61 will swing downward. When the multiple limiting blocks 61 swing to a vertical position, the weight of the defective bottle and the thrust of the suction cup 59 will cause it to move downward along the unloading guide 62. The buffer pad 63 installed at the bottom of the unloading guide 62 can buffer and protect the vertically falling bottle. When the bottle falls completely to the discharge trough, the output rod of the push telescopic rod extends and pushes the bottle out of the discharge trough, making it easier for operators to collect and store the defective bottles. After the defective bottle falls from the unloading guide 321, the limiting block 61 will rotate to a horizontal position under the torsional force of the torsion spring, which will facilitate the unqualified bottle to be supported by gravity again at the unloading guide 321. At this time, the swinging rod 572 will rise above the bottle to be inspected with the suction cup 59. Then, as needed, the swinging rod 572 can continue to swing to a horizontal position or swing to the bottle side collection station to continue working.

[0027] Example

[0028] Compared to Embodiment 1, where the rejection mechanism can only reject non-conforming bottles and containers within the inspection box, Embodiment 2 makes the following improvements: As a preferred embodiment of the present invention, see [reference]. Figure 1 As shown, it also includes a rejection actuator 7, which is installed on the conveying track 2 on the discharge port side of the inspection box 31 and is used to reject unqualified covers. The rejection actuator 7 includes a rejection telescopic rod 71 installed on the frame side of the conveying track 2 and a push plate 72 installed on the output rod end of the rejection telescopic rod 71. It should be noted that the rejection telescopic rod 71 can be either a cylinder or an electric telescopic rod, and the fixed section of the rejection telescopic rod 71 can be fixedly installed at any position on the frame 1 of the conveying track 2. If it is installed near the discharge port of the inspection box 31, the baffle on the conveying track 2 needs to be notched. An inclined guide plate is installed on the side of the conveying track 2 corresponding to the rejection telescopic rod 71 to discharge the unqualified cover from the conveying track 2. Specifically, when detecting foreign objects on the inner surface of the lid, the lids can be stacked sequentially on the left conveyor track 2, which will transport the lids to be tested to the feed inlet of the testing box 31. At this time, the descending suction cup 59 will attract and grasp the lids on the left conveyor track 2 and move them to the bottle body groove 331. Since a "C"-shaped flexible block 34 is installed in the bottle body groove 331, and the size of the "C"-shaped opening is slightly smaller than the diameter of the lid to be tested, when the lid moves into the "C"-shaped opening of the flexible block 34, the lid will be stuck into the flexible block 34. Then, the rotation of the diversion wheel 33 will move the lid to be tested to the bottom acquisition station, so that the bottom industrial camera 36 can collect images of foreign objects on the inner surface of the lid. If the cap is determined to be a qualified cap, the gripping and transferring component 5 will transfer the qualified cap from the bottle groove 331 to the conveying track 2 on the right side. If the cap is determined to be defective, the gripping and transfer assembly 5 will transfer the defective cap to the right conveyor track 2. However, when the defective cap moves to the rejection actuator 7, the rejection telescopic rod 71 will work according to the received signal, causing its output rod to extend and retract rapidly. This will cause the push plate 72 to move backward on the conveyor track 2, making it easier to quickly reject the defective cap from the right conveyor track 2. The rejected defective cap will then be discharged into the collection frame along the inclined guide plate. Then the output rod of the rejection telescopic rod 71 will be retracted, causing the push plate 72 to return to its initial position, making it easier to reject the next defective cap. It should be further explained that if foreign object detection is performed only on the inner surface of the cap or the bottle-side industrial camera 35 is not working, the swing rod 572 will not swing to the bottle-side acquisition station, and will not drive the cap moving at the bottle-side acquisition station to rotate. Similarly, the bottle-side industrial camera 35 will not work.

[0029] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0030] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automatic foreign object detection and defective product rejection device for a lid, comprising a frame and a conveyor track mounted on the frame, characterized in that, Also includes: The foreign object detection component is installed between the two conveyor tracks and uses an industrial camera to collect image signals from inside the bottle. The foreign object detection component includes a detection box, a support chassis, a diversion wheel, a bottle-side industrial camera, a bottom industrial camera, and a gripping and transfer component. The inspection box is installed between two conveyor tracks, and has an inlet and an outlet. Inside the inspection box is a support chassis that lifts and supports the bottles to be inspected. Above the support chassis is a diversion wheel that rotatably divides the bottles in a circular manner. Inside the inspection box, a bottle-side industrial camera is installed via a backlight lifting assembly to perform height scanning of foreign objects inside the bottles. A bottom industrial camera is installed on the support chassis to capture images of foreign objects inside the bottom of the bottles. Inside the inspection box is a gripping and transferring assembly that grips and transfers the bottles to be inspected on the conveyor track to the diversion wheel, and simultaneously grips and transfers the inspected bottles to the other side of the conveyor track. And a rejection actuator, which is installed inside the detection box and is used to reject unqualified bottles and containers from the diversion wheel.

2. The automatic foreign object detection and automatic defective product rejection device for a lid as described in claim 1, characterized in that, The diverter wheel has a circular array of several bottle-shaped grooves, and flexible blocks are installed in the bottle-shaped grooves. Inside the detection box, at the corresponding position on the outer ring of the diverter wheel, there are multiple segmented arc-shaped baffles.

3. The automatic foreign object detection and automatic defective product rejection device for a lid according to claim 2, characterized in that, The backlight lifting assembly includes a backlight panel, a first lead screw, a lead screw slider, and a mounting bracket. The two backlight panels are respectively installed between the support chassis and the flow distribution wheel, and between the flow distribution wheel and the top of the detection box. Light sources are evenly installed on the backlight panels. A first lead screw is vertically rotatably installed inside the detection box. A lead screw slider is connected to the first lead screw through a ball nut. A mounting bracket for mounting a bottle-side industrial camera is fixed on one side of the lead screw slider. The lens of the bottle-side industrial camera corresponds to the backlight panel.

4. The automatic foreign object detection and automatic defective product rejection device for a lid according to claim 2, characterized in that, The supporting chassis has mounting slots, and a transparent backlight ring is installed in the mounting slots. A light source is installed in the backlight ring, and the lens of the bottom industrial camera is installed in the backlight ring.

5. The automatic foreign object detection and automatic defective product rejection device for a lid according to claim 1, characterized in that, The grasping and transferring assembly includes a support block, a second lead screw, a guide slider, a vertical strip, a third lead screw, a first long rod, a second long rod, an air duct, and a suction cup; The top of the testing box is rotatably mounted with a second lead screw for driving the guide slider to slide via symmetrical support blocks. The second lead screw is connected to the guide slider via ball nuts. The bottom of the guide slider moves through a movable guide groove opened on the top of the testing box and is connected to a vertical strip. The vertical strip has a lifting groove for the rotation of a third lead screw. The third lead screw is connected to a first long rod and a second long rod via two ball nuts. The ends of the first long rod and the second long rod that are far apart from each other are equipped with suction cups via air guide pipes.

6. The automatic foreign object detection and automatic defective product rejection device for a lid according to claim 5, characterized in that, The second long rod is longer than the first long rod, and the second long rod includes a bottom support block, a swing support rod, and a gear assembly. The bottom support block is located below the first long rod, and the swing support rod is rotatably mounted on the upper surface of the bottom support block. One of the air guide pipes is rotatably mounted on the end of the swing support rod through a bearing, and the air guide pipe is connected to the output shaft of a servo motor fixedly mounted on the swing support rod through the gear assembly.

7. The automatic foreign object detection and automatic defective product rejection device for a lid according to claim 1, characterized in that, The air guide tube on the first long rod is slidably installed, and a support ring is fixedly installed on the air guide tube. The support ring is connected to the first long rod by a spring. The air guide tube is equipped with a limiting protrusion for limiting its sliding.

8. The automatic foreign object detection and automatic defective product rejection device for a lid according to claim 1, characterized in that, The rejection mechanism includes a limiting block, a discharge guide pipe, and a buffer pad. The supporting chassis has a discharge guide groove, and the limiting block is rotatably installed at the opening of the discharge guide groove by a torsion spring. The upper surface of the limiting block is flush with the upper surface of the supporting chassis. The detection box is fixed with a discharge guide pipe, and the upper opening of the discharge guide pipe is aligned with the discharge guide groove. The lower opening of the discharge guide pipe extends outside the detection box. The side of the lower opening of the discharge guide pipe has a discharge groove, and a buffer pad is installed at the lower opening.

9. The automatic foreign object detection and automatic defective product rejection device for a lid according to claim 1, characterized in that, It also includes a rejection actuator two, which is installed on the conveying track on the discharge port side of the inspection box and is used to reject unqualified covers. The rejection actuator two includes a rejection telescopic rod installed on the frame side of the conveying track and a push plate installed on the output rod end of the rejection telescopic rod.

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