Carton appearance defect detection equipment

Abstract

The invention relates to the technical field of carton flaw detection, in particular to carton appearance flaw detection equipment which comprises a box body, a rack, a mounting box, electric conveying rollers and the like, the rack is connected to the box body, the mounting box is connected in the box body, the top of the rack is connected with the bottom of the mounting box, and the electric conveying rollers are uniformly mounted in the mounting box at intervals. The appearance of a carton can be detected through the first vision camera, the second vision camera and the third vision camera, the upper side and the lower side of the carton can be cleaned through the first cleaning roller, it is avoided that actual flaws on the upper side and the lower side of the carton are covered with dirt, it is ensured that the first vision camera and the third vision camera can conduct correct recognition, and misjudgment is avoided; the front, back, left and right sides of the carton can be cleaned through the second cleaning rollers, it is avoided that dirt covers actual flaws on the front, back, left and right sides of the carton, it is ensured that the first visual camera can conduct correct recognition, and misjudgment is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of carton defect detection, and particularly to an appearance defect detection device for cartons. Background Art

[0002] With the development of modern industry, cartons are an important part of packaging materials and play a crucial role in logistics, transportation, and product protection. To ensure the quality of cartons and their image in the terminal market, accurate and efficient detection of appearance defects has become a key link in the production process. Appearance defects of cartons may include problems such as scratches, stains, wrinkles, uneven colors, etc. These problems not only affect the aesthetics of cartons but may also reduce the structural strength and durability of cartons.

[0003] Currently, most carton manufacturers use automated production lines to complete the entire production process from raw materials to finished products. In this process, the appearance inspection of cartons is usually achieved by combining machine vision technology. The machine vision system can quickly capture and analyze defects on the surface of cartons through high-precision cameras and image processing algorithms, thus providing reliable data support for quality control.

[0004] During the production and packaging process of cartons, due to various factors such as equipment friction and environmental dust, various dirt will inevitably adhere to the surface of cartons. The presence of dirt may cover up the defects of cartons and cause misjudgment. Currently, the dirt on the surface of cartons is generally cleaned by spraying. A carton has six faces. Among them, the bottom of the carton is in contact with conveying rollers or conveyor belts, and the spraying device cannot directly reach this area, resulting in the dirt at the bottom of the carton being difficult to be removed. For the sides of the carton, especially the part close to the bottom, due to the hidden position and small contact area, the spraying air flow is difficult to completely cover, easily causing cleaning dead corners. The ineffective removal of dirt on the surface of cartons will have an adverse impact on subsequent appearance inspections. Dirt may cover up the actual defects (such as scratches, cracks, etc.) on the surface of cartons, resulting in the detection system being unable to correctly identify them. Some dirt itself may be misidentified as defects on the surface of cartons, causing misjudgment. Summary of the Invention

[0005] In view of this, the present invention provides an appearance defect detection device for cartons, which can overcome the drawbacks that dirt may cover up the actual defects on the surface of cartons, resulting in the detection system being unable to correctly identify them, and some dirt itself may be misidentified as defects on the surface of cartons, causing misjudgment.

[0006] The technical solution of the present invention is as follows: An appearance defect detection device for cartons, comprising a box body, a frame, a mounting box, electric conveying rollers, an electric guide rail, a moving plate, a slide rail, a bidirectional lead screw, a stepping motor, a sliding plate, a first mounting plate, a first vision camera, a second mounting plate, a second vision camera, a third vision camera, a controller, a first cleaning mechanism, a second cleaning mechanism and a pushing mechanism. The box body is connected to the frame, and the mounting box is connected inside the box body. The top of the frame is connected to the bottom of the mounting box. Electric conveying rollers are evenly spaced and installed inside the mounting box. An electric guide rail is installed inside the box body. A moving plate is connected to the slider of the electric guide rail. Two slide rails are connected to the moving plate. A bidirectional lead screw is rotatably connected inside each slide rail. A stepping motor is installed on each slide rail. The output shaft of the stepping motor is connected to the bidirectional lead screw. Two sliding plates are slidably connected inside each slide rail. Both sliding plates are threadedly connected to the bidirectional lead screw. A first mounting plate is connected to each sliding plate. A first vision camera is installed on each first mounting plate. A second mounting plate is connected to the bottom of the mounting box. A second vision camera is installed on the second mounting plate. An opening is formed at the bottom of the mounting box. The second vision camera is aligned with the opening at the bottom of the mounting box so that the second vision camera can capture the bottom of the carton. A third vision camera is installed at the bottom of the lower slide rail. A controller is installed on the box body. The first vision camera, the second vision camera and the third vision camera are all electrically connected to the controller. The first cleaning mechanism is used to clean the upper and lower sides of the carton. The second cleaning mechanism is used to clean the front, back, left and right sides of the carton. The pushing mechanism is used to push the defective cartons off the electric conveying rollers.

[0007] In one embodiment, the first cleaning mechanism includes a first guide rod, a first moving block, a cross plate, a screw motor, a second moving block, a first frame, a first cleaning roller, a first driving motor and a first extraction component. The top of the mounting box is connected to the first guide rod. A first moving block is slidably connected to the first guide rod. A cross plate is connected to the first guide rod. A screw motor is installed on the cross plate. The screw of the screw motor is rotatably connected to the top of the mounting box. A second moving block is threadedly connected to the screw of the screw motor. A first frame is connected between the second moving block and the first moving block. The first frame is also connected inside the mounting box. A first cleaning roller is rotatably connected to both the left and right sides inside the first frame. The two first cleaning rollers inside the same first frame are driven by a pulley group. The upper first cleaning roller is used to clean the top of the carton. The lower first cleaning roller is used to clean the bottom of the carton. A first driving motor is installed on each first frame. The output shaft of the first driving motor is connected to the left first cleaning roller. The first extraction component is used to suck the dirt cleaned by the first cleaning roller.

[0008] In one embodiment, the first extraction component includes a first connecting pipe and a first air pipe. A first connecting pipe is connected to each first frame. A first air pipe is connected to each first connecting pipe.

[0009] In one embodiment, the second cleaning mechanism includes a second housing, a second cleaning roller, a second driving motor, a second extraction assembly, and a lifting assembly. The bottom of the sliding plate is connected to the second housing. A second cleaning roller for cleaning the front, rear, left, and right sides of the cardboard box is rotatably connected inside the second housing. A second driving motor is installed on each second housing, and the output shaft of the second driving motor is connected to the second cleaning roller. The second extraction assembly is used to suck the dirt cleaned by the second cleaning roller, and the lifting assembly is used to lift the cardboard box on the electric conveying roller.

[0010] In one embodiment, the second extraction assembly includes a second connecting pipe and a second air pipe. The second connecting pipe is connected to each second housing, and the second air pipe is connected to each second connecting pipe.

[0011] In one embodiment, the lifting assembly includes a guiding track, a guiding rod, a pushing block, a spring, a guiding plate, a lifting plate, a contact plate, a pushing plate, and a second guiding rod. The guiding track is connected inside the box body. The guiding rod is connected inside the guiding track. The pushing block is slidably connected inside the guiding track. The guiding rod slidably penetrates through the pushing block. A spring is connected between the guiding track and the pushing block. The guiding plate is connected inside the mounting box. Four lifting plates are slidably connected to the guiding plate. Each lifting plate is respectively located between two adjacent electric conveying rollers. A contact plate is commonly connected to the bottoms of the four lifting plates. The pushing plate is connected to the lower sliding rail. The pushing plate slidably penetrates through the box body. The pushing plate is used to push the pushing block forward. The pushing block pushes the contact plate upward. The contact plate drives the lifting plate upward. The lifting plate lifts the cardboard box on the electric conveying roller. The second guiding rod for guiding the pushing plate is connected to the box body. The second guiding rod is slidably connected to the pushing plate.

[0012] In one embodiment, the pushing mechanism includes an electric push rod and a pushing plate. The electric push rod is installed on the box body. The electric push rod is electrically connected to the controller. The pushing plate is commonly connected to the telescopic rod of the electric push rod.

[0013] In one embodiment, it further includes a mounting frame and a conveyor. The mounting frame is connected to the box body. The conveyor is installed on the top of the mounting frame.

[0014] In one embodiment, it further includes a first lighting lamp and a second lighting lamp. The first lighting lamp is installed inside the box body. The second lighting lamp is installed on the second mounting plate.

[0015] The beneficial effects are as follows: 1. In the present invention, the appearance of the cardboard box can be detected by the first vision camera, the second vision camera, and the third vision camera. The upper and lower sides of the cardboard box can be cleaned by the first cleaning roller, avoiding dirt covering the actual defects on the upper and lower sides of the cardboard box, ensuring that the first vision camera and the third vision camera can correctly identify, and avoiding misjudgment. The front, rear, left, and right sides of the cardboard box can be cleaned by the second cleaning roller, avoiding dirt covering the actual defects on the front, rear, left, and right sides of the cardboard box, ensuring that the first vision camera can correctly identify, and avoiding misjudgment.

[0016] 2. The defective cartons can be pushed onto the conveyor by the pusher plate. The conveyor can transport the defective cartons to the conveying equipment, and the conveying equipment transports the defective cartons to the repair position, forming a production line, thereby improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The three-dimensional structural schematic diagram of the present invention is shown.

[0018] Figure 2 The cross-sectional view of the box body of the present invention is shown.

[0019] Figure 3 The three-dimensional structural schematic diagram of the slide rail, slide plate, first mounting plate and first vision camera of the present invention is shown.

[0020] Figure 4 The three-dimensional structural schematic diagram of the bidirectional lead screw, stepping motor, slide plate and third vision camera of the present invention is shown.

[0021] Figure 5 The three-dimensional structural schematic diagram of the second mounting plate and the second vision camera of the present invention is shown.

[0022] Figure 6 The first three-dimensional structural schematic diagram of the first cleaning mechanism of the present invention is shown.

[0023] Figure 7 The second three-dimensional structural schematic diagram of the first cleaning mechanism of the present invention is shown.

[0024] Figure 8 The three-dimensional structural schematic diagram of the first connecting pipe and the first air pipe of the present invention is shown.

[0025] Figure 9 The three-dimensional structural schematic diagram of the second frame body and the second air pipe of the present invention is shown.

[0026] Figure 10 The three-dimensional structural schematic diagram of the second cleaning roller and the second driving motor of the present invention is shown.

[0027] Figure 11 The three-dimensional structural schematic diagram of the second connecting pipe and the second air pipe of the present invention is shown.

[0028] Figure 12 The three-dimensional structural schematic diagram of the guiding track, pushing block, pushing plate and second guide rod of the present invention is shown.

[0029] Figure 13 The three-dimensional structural schematic diagram of the guiding plate, lifting plate and contact plate of the present invention is shown.

[0030] Figure 14The schematic three-dimensional structure of the guiding track, guiding rod, pushing block and spring of the present invention is shown.

[0031] Figure 15 The schematic three-dimensional structure of the electric push rod, pushing plate, mounting rack and conveyor of the present invention is shown.

[0032] Figure 16 The schematic three-dimensional structure of the first lighting lamp of the present invention is shown.

[0033] Figure 17 The schematic three-dimensional structure of the second lighting lamp of the present invention is shown.

[0034] In the attached drawings: 1 - box body, 2 - frame, 3 - mounting box, 4 - electric conveying roller, 5 - electric guide rail, 6 - moving plate, 7 - slide rail, 8 - bidirectional lead screw, 9 - stepping motor, 10 - sliding plate, 11 - first mounting plate, 12 - first vision camera, 13 - second mounting plate, 14 - second vision camera, 141 - third vision camera, 15 - controller, 161 - first guide rod, 162 - first moving block, 163 - cross plate, 164 - lead screw motor, 165 - second moving block, 166 - first frame, 167 - first cleaning roller, 168 - first driving motor, 169 - first connecting pipe, 1610 - first air pipe, 171 - second frame, 172 - second cleaning roller, 173 - second driving motor, 174 - second connecting pipe, 175 - second air pipe, 176 - guiding track, 177 - guiding rod, 178 - pushing block, 179 - spring, 1710 - guiding plate, 1711 - lifting plate, 1712 - contact plate, 1713 - pushing plate, 1714 - second guide rod, 181 - electric push rod, 182 - pushing plate, 191 - mounting rack, 192 - conveyor, 201 - first lighting lamp, 202 - second lighting lamp. Detailed implementation manners

[0035] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0036] In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. The technical solutions of the present invention will be clearly and completely described below with reference to the attached drawings. It should be noted that the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0037] Refer to Figures 1-15, An appearance defect detection device for cardboard boxes, comprising a box body 1, a frame 2, a mounting box 3, electric conveying rollers 4, electric guide rails 5, a moving plate 6, slide rails 7, a bidirectional lead screw 8, a stepping motor 9, a sliding plate 10, a first mounting plate 11, a first vision camera 12, a second mounting plate 13, a second vision camera 14, a third vision camera 141, a controller 15, a first cleaning mechanism, a second cleaning mechanism and a pushing mechanism. The lower left side of the box body 1 is bolted to the frame 2. The middle part inside the box body 1 is bolted to the mounting box 3. The top of the frame 2 is connected to the bottom of the mounting box 3. Electric conveying rollers 4 are evenly and spacedly installed inside the mounting box 3. On the front and rear sides of the upper part inside the box body 1, electric guide rails 5 are symmetrically installed left and right by bolts. The sliders of the electric guide rails 5 are bolted to the moving plate 6. Two slide rails 7 are bolted between the four moving plates 6. The two slide rails 7 are arranged in a crisscross manner. Bidirectional lead screws 8 are rotatably connected inside the slide rails 7. Stepping motors 9 are bolted to the slide rails 7. The output shafts of the stepping motors 9 and the bidirectional lead screws 8 are connected by couplings. Two sliding plates 10 are slidably connected inside each slide rail 7. The two sliding plates 10 are threadedly connected to the bidirectional lead screws 8. The thread directions of the two sliding plates 10 are opposite, so the bidirectional lead screw 8 can drive the two sliding plates 10 to move in opposite directions. On the sides where the four sliding plates 10 are away from each other, a first mounting plate 11 is bolted. On the sides where the four first mounting plates 11 are close to each other, a first vision camera 12 is bolted. In the middle of the bottom of the mounting box 3, a second mounting plate 13 is bolted. At the lower part of the second mounting plate 13, a second vision camera 14 is bolted. An opening is formed in the middle of the bottom of the mounting box 3. The second vision camera 14 is aligned with the opening at the bottom of the mounting box 3, so that the second vision camera 14 can capture the bottom of the cardboard box. At the middle of the bottom of the lower slide rail 7, a third vision camera 141 is bolted. On the left part of the front side of the box body 1, a controller 15 is bolted. The first vision camera 12, the second vision camera 14 and the third vision camera 141 are all electrically connected to the controller 15. The first cleaning mechanism is used to clean the upper and lower sides of the cardboard box. The second cleaning mechanism is used to clean the front, rear, left and right sides of the cardboard box. The pushing mechanism is used to push the defective cardboard box off the electric conveying rollers 4.

[0038] Refer to Figures 6-8, the first cleaning mechanism includes a first guide rod 161, a first moving block 162, a cross plate 163, a lead screw motor 164, a second moving block 165, a first frame 166, a first cleaning roller 167, a first driving motor 168 and a first extraction component. Both the front and rear sides of the left side of the top of the installation box 3 are connected with a first guide rod 161. A first moving block 162 is slidably connected to each first guide rod 161. The upper ends of the two first guide rods 161 are jointly connected with a cross plate 163. A lead screw motor 164 is installed on both the front and rear parts of the cross plate 163. The lead screw of the lead screw motor 164 is rotatably connected to the top of the installation box 3. A second moving block 165 is threadedly connected to the lead screw of the lead screw motor 164. A first frame 166 is connected between the second moving block 165 and the first moving block 162. The first frame 166 is also connected to the left side inside the installation box 3. The left and right sides inside the first frame 166 are rotatably connected with a first cleaning roller 167 respectively. The two first cleaning rollers 167 in the same first frame 166 are driven by a pulley group. A first driving motor 168 is installed on the left front part of the first frame 166 through bolts. The output shaft of the first driving motor 168 is connected to the front end of the left first cleaning roller 167 through a coupling. The first extraction component is used to suck the dirt cleaned by the first cleaning roller 167.

[0039] Refer to Figures 6-8 , the first extraction component includes a first connecting pipe 169 and a first air pipe 1610. A group of first connecting pipes 169 are connected to both the left and right sides of the first frame 166. There are eight first connecting pipes 169 in each group. The eight first connecting pipes 169 in the same group are evenly spaced. A first air pipe 1610 is connected to each group of first connecting pipes 169.

[0040] Refer to Figures 9-14 , the second cleaning mechanism includes a second frame 171, a second cleaning roller 172, a second driving motor 173, a second extraction component and a lifting component. The second frame 171 is connected to the bottom of the slide plate 10 through bolts. The second cleaning roller 172 is rotatably connected inside the second frame 171. A second driving motor 173 is installed on the second frame 171 through bolts. The output shaft of the second driving motor 173 is connected to the second cleaning roller 172 through a coupling. The second extraction component is used to suck the dirt cleaned by the second cleaning roller 172. The lifting component is used to lift the carton on the electric conveying roller 4.

[0041] Refer to Figures 9-11 , the second extraction component includes a second connecting pipe 174 and a second air pipe 175. Eight second connecting pipes 174 are evenly spaced and connected to the second frame 171. A second air pipe 175 is connected to the eight second connecting pipes 174 together.

[0042] Refer to Figures 12-14, the lifting assembly includes a guiding track 176, a guiding rod 177, a pushing block 178, a spring 179, a guiding plate 1710, a lifting plate 1711, a contact plate 1712, a pushing plate 1713 and a second guiding rod 1714. The lower part inside the box body 1 is connected with the guiding track 176 by bolts. Both the left and right sides inside the guiding track 176 are connected with the guiding rods 177. A pushing block 178 is slidably connected inside the guiding track 176. Both the front and rear sides of the pushing block 178 are inclined surfaces. The guiding rods 177 slidably penetrate through the pushing block 178. Springs 179 are sleeved on the guiding rods 177. The two ends of the springs 179 are respectively connected with the guiding track 176 and the pushing block 178. The right part inside the installation box 3 is connected with a guiding plate 1710. The guiding plate 1710 is located below the electric conveying roller 4. Four lifting plates 1711 are slidably connected to the guiding plate 1710 at equal intervals. Each lifting plate 1711 is respectively located between two adjacent electric conveying rollers 4. The bottoms of the four lifting plates 1711 are commonly connected with a contact plate 1712. The rear side of the lower slide rail 7 is connected with a pushing plate 1713 by bolts. The pushing plate 1713 slidably penetrates through the rear side of the box body 1. The pushing plate 1713 contacts the inclined surface at the rear side of the pushing block 178. The upper part of the rear side of the box body 1 is connected with a second guiding rod 1714. The second guiding rod 1714 is slidably connected with the pushing plate 1713.

[0043] Refer to Figure 15 , the pushing mechanism includes an electric push rod 181 and a pushing plate 182. The left and right sides of the middle part of the rear side of the box body 1 are both installed with electric push rods 181 by bolts. The electric push rods 181 are electrically connected to the controller 15. The front ends of the telescopic rods of the two electric push rods 181 are commonly connected with a pushing plate 182.

[0044] The staff places the cardboard box on the electric conveying roller 4. The electric conveying roller 4 conveys the cardboard box to the right. The cardboard box will pass through the first cleaning rollers 167 on the upper and lower sides. The top of the cardboard box will contact the upper first cleaning roller 167, and the bottom of the cardboard box will contact the lower first cleaning roller 167. The output shaft of the driving motor 168 drives the left first cleaning roller 167 to rotate. The left first cleaning roller 167 drives the right first cleaning roller 167 to rotate through the pulley group. The upper first cleaning roller 167 can clean the top of the cardboard box, and the lower first cleaning roller 167 can clean the bottom of the cardboard box, avoiding dirt covering the actual defects on the upper and lower sides of the cardboard box, ensuring that the first vision camera 12 and the third vision camera 141 can correctly identify, and avoiding misjudgment. Connect the first air pipe 1610 to the dust suction pump. The dust suction pump sucks the dirt cleaned by the first cleaning roller 167 through the first air pipe 1610 and the first connecting pipe 169, avoiding the dirt reattaching to the cardboard box. The lead screw motor 164 can drive the second moving block 165 to move up and down. The second moving block 165 drives the upper frame 166 to move up and down, thereby driving the upper first cleaning roller 167 to move up and down, adjusting the height of the upper first cleaning roller 167. The height of the upper first cleaning roller 167 can be adjusted according to the height of the cardboard box to ensure that the upper first cleaning roller 167 can contact the top of the cardboard box. Subsequently, the electric conveying roller 4 continues to convey the cardboard box to the right. The cardboard box will pass through the second vision camera 14. There is an opening at the bottom of the installation box 3, and there is a gap between two adjacent electric conveying rollers 4, enabling the second vision camera 14 to photograph the bottom of the cardboard box for appearance inspection of the bottom of the cardboard box. When the cardboard box moves to directly below the third vision camera 141, the electric conveying roller 4 stops. If the second vision camera 14 detects a defect on the bottom of the cardboard box, the controller 15 will control the telescopic rod of the electric push rod 181 to extend, driving the pushing plate 182 to move forward. The pushing plate 182 pushes the defective cardboard box forward, pushing the defective cardboard box out of the electric conveying roller 4. If the second vision camera 14 detects that there is no defect on the bottom of the cardboard box, the controller 15 will not control the electric push rod 181 to operate. At this time, the third vision camera 141 can photograph the top of the cardboard box for appearance inspection of the top of the cardboard box. If the third vision camera 141 detects a defect on the top of the cardboard box, the controller 15 will control the telescopic rod of the electric push rod 181 to extend, driving the pushing plate 182 to move forward. The pushing plate 182 pushes the defective cardboard box forward, pushing the defective cardboard box out of the electric conveying roller 4. If the third vision camera 141 detects that there is no defect on the top of the cardboard box, the controller 15 will not control the electric push rod 181 to operate. If there are no defects on both the upper and lower sides of the cardboard box, then control the electric guide rail 5 to drive the moving plate 6 to move downward. The moving plate 6 drives the slide rail 7 to move downward. The slide rail 7 drives the pushing plate 1713 and the slide plate 10 to move downward. The slide plate 10 drives the second cleaning roller 172 and the first vision camera 12 to move downward. The pushing plate 1713 contacts the inclined surface at the rear of the pushing block 178, so the pushing plate 1713 can push the pushing block 178 forward, and the spring 179 is compressed.The inclined surface on the front side of the push block 178 will contact the contact plate 1712 and push the contact plate 1712 to move upward. The contact plate 1712 drives the lifting plate 1711 to move upward. The lifting plate 1711 can lift the carton to ensure that the cleaning roller 172 can contact the front, back, left, and right sides of the carton near the bottom to avoid cleaning dead corners. Then the four cleaning rollers 172 are in contact with the front, back, left, and right sides of the carton respectively. The output shaft of the driving motor 173 drives the cleaning roller 172 to rotate to clean the front, back, left, and right sides of the carton to avoid dirt covering up the actual defects on the front, back, left, and right sides of the carton, ensuring that the visual camera 112 can correctly identify and avoid misjudgment. Connect the air pipe 175 The vacuum pump absorbs the dirt cleaned by the cleaning roller 172 through the air pipe 175 and the connecting pipe 174 to prevent the dirt from reattaching to the carton. After cleaning, the electric guide rail 5 is controlled to drive the movable plate 6 to move upward, and the movable plate 6 drives the push plate 1713 and the visual camera 12 to move upward. The push plate 1713 no longer pushes the push block 178. Under the action of the spring 179, the push block 178 will move backward, and the push block 178 no longer pushes the contact plate 1712. The contact plate 1712 and the lifting plate 1711 move downward under the action of their own gravity, and the carton falls accordingly. The carton is placed back on the electric conveyor roller 4. During the descent of the carton, the four visual cameras 12 respectively shoot The controller 15 controls the electric push rod 181 to extend the telescopic rod to push the defective carton out of the electric conveying roller 4. If there are no defects on the front, back, left, and right sides of the carton, the controller 15 will not control the electric push rod 181 to operate, and then the electric conveying roller 4 will continue to operate to convey the carton without defects to the right. The output shaft of the upper stepper motor 9 can drive the upper bidirectional screw rod 8 to rotate, and the upper bidirectional screw rod 8 can drive the slide plates 10 on the left and right sides to move in opposite directions, thereby driving the cleaning rollers 172 on the left and right sides to move in opposite directions. Adjust the distance between the cleaning rollers 172 on the left and right sides, and adjust the distance between the cleaning rollers 172 on the left and right sides according to the length of the carton to ensure that the cleaning rollers 172 on the left and right sides can contact the left and right sides of the carton. The output shaft of the stepper motor 9 below can drive the bidirectional screw rod 8 below to rotate, and the bidirectional screw rod 8 below can drive the slide plates 10 on the front and rear sides to move in opposite directions, thereby driving the cleaning rollers 172 on the front and rear sides to move in opposite directions. Adjust the distance between the cleaning rollers 172 on the front and rear sides, and adjust the distance between the cleaning rollers 172 on the front and rear sides according to the width of the carton to ensure that the cleaning rollers 172 on the front and rear sides can contact the front and rear sides of the carton.

[0045] Reference Figure 15, it further includes a mounting bracket 191 and a conveyor 192. The middle part of the front side of the box body 1 is connected to the mounting bracket 191 by bolts, and the conveyor 192 is mounted on the top of the mounting bracket 191 by bolts.

[0046] When the telescopic rod of the electric push rod 181 extends, it will drive the pushing plate 182 to move forward. The pushing plate 182 pushes the defective cartons forward, pushing the defective cartons out of the electric conveying roller 4. The defective cartons will fall onto the conveyor 192. The conveyor 192 can convey the defective cartons forward. A conveying device can be arranged on the front side of the conveyor 192. The conveyor 192 conveys the defective cartons to the conveying device, and the conveying device conveys the defective cartons to the repair position, forming a production line, thereby improving work efficiency.

[0047] Refer to Figure 16 and Figure 17 , it further includes a first lighting lamp 201 and a second lighting lamp 202. Two first lighting lamps 201 are mounted on the upper left and right sides and the front and rear sides inside the box body 1 by bolts, and two second lighting lamps 202 are mounted on the front and rear sides of the lower part of the mounting plate two 13 by bolts.

[0048] The first lighting lamp 201 and the second lighting lamp 202 can illuminate the surrounding of the cartons, providing sufficient light so that the first vision camera 12, the second vision camera 14 and the third vision camera 141 can capture the tiny defects on the cartons, improving the detection accuracy.

[0049] Obviously, the embodiments described above are only a part of the embodiments of the present invention, rather than all the embodiments. It only expresses the preferred embodiments of the present invention, and the description is relatively specific and detailed, but it cannot be understood as a limitation to the scope of the patent of the present invention.

[0050] It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations, quantity increases or decreases, improvements and substitutions can be made. Therefore, based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present invention.

Claims

1. An appearance defect detection device for a carton, comprising a box body (1), a frame (2), an installation box (3) and electric conveying rollers (4). The frame (2) is connected to the box body (1), the installation box (3) is connected inside the box body (1), the top of the frame (2) is connected to the bottom of the installation box (3), and the electric conveying rollers (4) are evenly spaced and installed inside the installation box (3). It is characterized in that, It also includes an electric guide rail (5), a moving plate (6), slide rails (7), a bidirectional lead screw (8), a stepper motor (9), a sliding plate (10), a first mounting plate (11), a first vision camera (12), a second mounting plate (13), a second vision camera (14), a third vision camera (141), a controller (15), a first cleaning mechanism, a second cleaning mechanism and a pushing mechanism. An electric guide rail (5) is installed inside the box body (1). A moving plate (6) is connected to the slider of the electric guide rail (5). Two slide rails (7) are connected to the moving plate (6). Bidirectional lead screws (8) are rotatably connected inside the slide rails (7). Stepper motors (9) are installed on the slide rails (7). The output shafts of the stepper motors (9) are connected to the bidirectional lead screws (8). Two sliding plates (10) are slidably connected inside the slide rails (7). The two sliding plates (10) are threadedly connected to the bidirectional lead screws (8). First mounting plates (11) are connected to the sliding plates (10). First vision cameras (12) are installed on the first mounting plates (11). A second mounting plate (13) is connected to the bottom of the mounting box (3). A second vision camera (14) is installed on the second mounting plate (13). An opening is formed at the bottom of the mounting box (3). The second vision camera (14) is aligned with the opening at the bottom of the mounting box (3) so that the second vision camera (14) can capture the bottom of the carton. A third vision camera (141) is installed at the bottom of the lower slide rail (7). A controller (15) is installed on the box body (1). The first vision camera (12), the second vision camera (14) and the third vision camera (141) are all electrically connected to the controller (15). The first cleaning mechanism is used to clean the upper and lower sides of the carton. The second cleaning mechanism is used to clean the front, rear, left and right sides of the carton. The pushing mechanism is used to push the defective cartons off the electric conveying rollers (4).

2. The appearance defect detection device for a carton according to claim 1, characterized in that, The first cleaning mechanism includes a first guide rod (161), a first moving block (162), a cross plate (163), a lead screw motor (164), a second moving block (165), a first frame (166), a first cleaning roller (167), a first drive motor (168) and a first extraction component. A first guide rod (161) is connected to the top of the installation box (3). A first moving block (162) is slidably connected to the first guide rod (161). A cross plate (163) is connected to the first guide rod (161). A lead screw motor (164) is installed on the cross plate (163). The lead screw of the lead screw motor (164) is rotatably connected to the top of the installation box (3). A second moving block (165) is threadedly connected to the lead screw of the lead screw motor (164). A first frame (166) is connected between the second moving block (165) and the first moving block (162). A first frame (166) is also connected inside the installation box (3). A first cleaning roller (167) is rotatably connected to both the left and right sides inside the first frame (166). The two first cleaning rollers (167) inside the same first frame (166) are driven by a pulley group. The upper first cleaning roller (167) is used to clean the top of the carton, and the lower first cleaning roller (167) is used to clean the bottom of the carton. A first drive motor (168) is installed on the first frame (166). The output shaft of the first drive motor (168) is connected to the left first cleaning roller (167). The first extraction component is used to suck up the dirt cleaned by the first cleaning roller (167).

3. The appearance defect detection device for a carton according to claim 2, characterized in that, The first extraction component includes a first connecting pipe (169) and a first air pipe (1610). A first connecting pipe (169) is connected to the first frame (166). A first air pipe (1610) is connected to the first connecting pipe (169).

4. The appearance defect detection device for a carton according to claim 3, characterized in that, The second cleaning mechanism includes a second frame (171), a second cleaning roller (172), a second drive motor (173), a second extraction component and a lifting component. A second frame (171) is connected to the bottom of the sliding plate (10). A second cleaning roller (172) for cleaning the front, back, left and right sides of the carton is rotatably connected inside the second frame (171). A second drive motor (173) is installed on the second frame (171). The output shaft of the second drive motor (173) is connected to the second cleaning roller (172). The second extraction component is used to suck up the dirt cleaned by the second cleaning roller (172). The lifting component is used to lift the carton on the electric conveying roller (4).

5. The appearance defect detection device for a carton according to claim 4, characterized in that, The second extraction component includes a second connecting pipe (174) and a second air pipe (175). A second connecting pipe (174) is connected to the second frame (171). A second air pipe (175) is connected to the second connecting pipe (174).

6. The appearance defect detection device for a carton according to claim 5, characterized in that, The lifting assembly includes a guiding track (176), a guiding rod (177), a pushing block (178), a spring (179), a guiding plate (1710), a lifting plate (1711), a contact plate (1712), a pushing plate (1713) and a second guiding rod (1714). The guiding track (176) is connected inside the box body (1). The guiding rod (177) is connected inside the guiding track (176). The pushing block (178) is slidably connected inside the guiding track (176). The guiding rod (177) slidably penetrates through the pushing block (178). A spring (179) is connected between the guiding track (176) and the pushing block (178). The guiding plate (1710) is connected inside the mounting box (3). Four lifting plates (1711) are slidably connected to the guiding plate (1710). Each lifting plate (1711) is respectively located between two adjacent electric conveying rollers (4). A contact plate (1712) is commonly connected to the bottoms of the four lifting plates (1711). The pushing plate (1713) is connected to the lower slide rail (7). The pushing plate (1713) slidably penetrates through the box body (1). The pushing plate (1713) is used to push the pushing block (178) to move forward. The pushing block (178) pushes the contact plate (1712) to move upward. The contact plate (1712) drives the lifting plate (1711) to move upward. The lifting plate (1711) lifts the carton on the electric conveying roller (4). A second guiding rod (1714) for guiding the pushing plate (1713) is connected to the box body (1). The second guiding rod (1714) and the pushing plate (1713) are slidably connected.

7. The appearance defect detection device for a carton according to claim 6, characterized in that, The pushing mechanism includes an electric push rod (181) and a pushing plate (182). The electric push rod (181) is installed on the box body (1). The electric push rod (181) is electrically connected to the controller (15). A pushing plate (182) is commonly connected to the telescopic rod of the electric push rod (181).

8. An appearance defect detection device for a carton according to claim 7, characterized in that, It further includes a mounting frame (191) and a conveyor (192). The mounting frame (191) is connected to the box body (1). The conveyor (192) is installed on the top of the mounting frame (191).

9. The appearance defect detection device for a carton according to claim 8, characterized in that, It further includes a first lighting lamp (201) and a second lighting lamp (202). The first lighting lamp (201) is installed inside the box body (1). The second lighting lamp (202) is installed on the second mounting plate (13).

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