A label inspection machine

Abstract

The application discloses a label detection machine, which comprises a rotary feeding part, a camera front detection part, a waste product removing part, a material collecting part and a rack; the rotary feeding part is arranged at the most front end of the rack, stores and delivers labels to the camera front detection part; the camera front detection part is arranged on the rack and located behind the rotary feeding part; the camera front detection part delivers the good or bad products to the waste product removing part after detecting the labels; the waste product removing part is arranged on the rack and located behind the camera front detection part; the removing part removes the detected waste products and delivers the good products to the material collecting part; the material collecting part is arranged on the rack and located behind the waste product removing part; the good products after inspection are gathered and stacked in the material collecting part. The labels are neatly placed and delivered, stably delivered by the lower belt, uniformly output after printing, not scratched and stably operated. The two groups of light sources and the camera can effectively detect the printing defects on various color images.

Description

Technical Field

[0001] This invention relates to a label post-printing inspection device, and more particularly to a label inspection machine. Background Technology

[0002] Label inspection machines are specialized equipment used on industrial production lines for automated quality control of product labels. They primarily use machine vision or RFID technology to inspect the printing quality, positional accuracy, barcode readability, and content accuracy of labels, preventing defective products from entering the market.

[0003] The conveying mechanism of label inspection equipment is simple, which can lead to uneven placement or inconsistent output, random label sticking and scratching of the printed surface, missed inspections, and inconvenient collection, seriously affecting efficiency and the yield of finished products. Summary of the Invention

[0004] To address the aforementioned existing technical problems, this invention provides a label inspection machine that enables labels to be neatly arranged and conveyed, with stable belt delivery, uniform placement, and neat output.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: a label inspection machine, comprising a rotary feeding section, a front-facing camera inspection section, a defective product rejection section, a receiving section, and a frame; the rotary feeding section is located at the front end of the frame, storing and conveying labels to the front-facing camera inspection section; the front-facing camera inspection section is located on the frame, behind the rotary feeding section, and inspects the labels to determine the quality of the products before conveying them to the defective product rejection section; the defective product rejection section is located on the frame, behind the front-facing camera inspection section, rejecting the detected defective products and conveying the good products to the receiving section; the receiving section is located on the frame, behind the defective product rejection section, where the inspected good products are collected and piled up.

[0006] Furthermore, the rotating feeding unit of the present invention includes a storage mechanism for storing labels, a suction nozzle for picking up labels, a star-shaped rotating disk, an air distribution valve for controlling the suction nozzle to suck in or blow air, and a first-section suction conveyor belt; the storage mechanism is installed above the frame, and the discharge end is inclined downward and connected to the star-shaped rotating disk; multiple sets of suction nozzles are provided on the star-shaped rotating disk, and the star-shaped rotating disk is mounted on the frame and is rotatable; the air distribution valve is located on the star-shaped rotating disk and is connected to each set of suction nozzles through an air pipe; the first-section suction conveyor belt is located on the frame and below the star-shaped rotating disk; the suction nozzle is controlled by the air distribution valve to pick up labels from the storage mechanism, the rotation of the star-shaped rotating disk drives the suction nozzle to rotate synchronously, and the air distribution valve controls the suction nozzle to blow air, releasing the labels onto the first-section suction conveyor belt.

[0007] Furthermore, the present invention provides five sets of suction nozzles.

[0008] Furthermore, the front detection unit of the camera includes a second conveyor suction belt, a tunnel light camera, a line light source camera, a tunnel light source, and a line light source. The second conveyor suction belt is mounted on the suction conveyor wall plate of the detection unit via belt drive rollers. The suction conveyor wall plate of the detection unit is connected to the frame. A suction chamber is provided inside the second conveyor suction belt, and a suction pipe is provided on the side of the suction chamber. The second conveyor suction belt extends from the first suction conveyor belt. The tunnel light camera, the line light source camera, the tunnel light source, and the line light source are positioned above the second conveyor suction belt. The tunnel light camera and the line light source camera are mounted on the camera mounting wall plate, and the tunnel light source and the line light source are mounted on the main detection light source mounting wall plate.

[0009] Furthermore, in this invention, the camera mounting wall panel is connected to the main wall panel for mounting the detection light source, and the bottom of the main wall panel for mounting the detection light source is connected to the frame via a shock-absorbing pad.

[0010] Furthermore, the waste removal section of the present invention includes a third-section suction conveyor belt, a rear-section waste-kicking suction belt, and a waste-kicking nozzle; the third-section suction conveyor belt is mounted on the waste-kicking section wall plate via a belt drive roller and is driven by a belt drive roller, the waste-kicking section wall plate is connected to the frame, and the third-section suction conveyor belt extends from the second-section suction conveyor belt; the rear-section waste-kicking suction belt is located at the rear of the third-section suction conveyor belt, and the waste-kicking port is located between the two; a waste-kicking nozzle is provided above the waste-kicking port and is mounted on an air nozzle bracket.

[0011] Furthermore, the present invention includes two sets of pressure rollers at the waste outlet.

[0012] Furthermore, the receiving section of the present invention includes a receiving conveyor belt and a receiving tray; the receiving conveyor belt is driven by a belt drive sprocket, the front end of the receiving conveyor belt is connected to the exhaust belt at the rear of the waste removal section, and a pressure roller for pressing down the labels is provided at the connection point. The pressure roller is mounted on the support wall plate through a pressure roller mounting bracket. The support wall plate is connected to the frame, and a receiving tray is provided at the rear end of the receiving conveyor belt.

[0013] Furthermore, the present invention includes a counting photoelectric device at the junction of the front end of the receiving conveyor belt and the rear suction belt of the waste removal section.

[0014] Furthermore, the receiving tray is provided with an inclined baffle.

[0015] The beneficial effects of adopting the above technical solution are:

[0016] (1) This invention uses a rotary suction system. The air volume is precisely adjusted by the air distribution valve, ensuring that the labels are neatly arranged and transported, and that the transfer to the lower belt is smooth, guaranteeing a uniform output of the labels. The rotary suction system prevents scratches and ensures smooth operation.

[0017] (2) Two sets of light sources and cameras are used to effectively detect printing defects on various color images, such as stains, ink splatter, missing prints, color difference, misregistration, knife marks, wrinkles, etc.

[0018] (3) The waste removal method adopts pneumatic blowing, which does not require stopping the machine to remove waste.

[0019] (4) The paper feeding adopts a full suction belt type, which ensures stable paper feeding and high production efficiency.

[0020] (5) When changing to products of different specifications, there are fewer adjustment steps and the operation is convenient. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the rotating feeder structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the front detection section of the camera in this invention;

[0024] Figure 4 This is a schematic diagram of the waste removal section of the present invention;

[0025] Figure 5 This is a schematic diagram of the material receiving section of the present invention; Detailed Implementation

[0026] The present invention will now be described in further detail with reference to the accompanying drawings.

[0027] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0028] One embodiment of the present invention: as follows Figure 1As shown, a label inspection machine includes a rotary feeding section A, a camera front inspection section B, a defect rejection section C, a receiving section D, and a frame E. The rotary feeding section A is located at the front end of the frame E, storing and conveying labels to the camera front inspection section B. The camera front inspection section B is located on the frame E, behind the rotary feeding section A, and inspects the labels to determine the quality of the products before conveying them to the defect rejection section C. The defect rejection section C is located on the frame E, behind the camera front inspection section B, and rejects the detected defective products, conveying the good products to the receiving section D. The receiving section D is located on the frame E, behind the defect rejection section C, where the inspected good labels are collected and piled up.

[0029] In other specific embodiments of the present invention, the remainder is the same as the embodiments described above, except that, as follows: Figure 2 As shown, the rotary feeding unit A includes a storage mechanism A-1 for storing labels, a suction nozzle A-2 for picking up labels, a star disk A-3, an air distribution valve A-4 for controlling the suction nozzle A-2 to suck in or blow air, and a first-section suction conveyor belt A-6; the storage mechanism A-1 is installed above the frame E, with its discharge end tilted downwards and connected to the star disk A-3; the star disk A-3 is equipped with multiple sets of suction nozzles A-2, and the star disk A-3 is mounted on the frame E and is rotatable; Air distribution valve A-4 is installed on star turntable A-3 and connected to each group of suction nozzles A-2 via air pipe A-5; the first section of suction conveyor belt A-6 is installed on frame E, located below star turntable A-3; the suction nozzle A-2 is controlled by air distribution valve A-4 to pick up labels from storage mechanism A-1, the rotation of star turntable A-3 drives suction nozzle A-2 to rotate synchronously, and the air distribution valve A-4 controls suction nozzle A-2 to blow air, releasing the labels onto the first section of suction conveyor belt A-6.

[0030] In other specific embodiments of the present invention, the remainder is the same as the embodiments described above, except that, as follows: Figure 2 As shown, there are 5 sets of suction nozzles A-2. The number of suction nozzles A-2 can be adjusted according to actual working conditions, but 5 sets are preferred for high work efficiency.

[0031] In other specific embodiments of the present invention, the remainder is the same as the embodiments described above, except that, as follows: Figure 3As shown, the front detection unit B of the camera includes a second section of conveyor suction belt B-9, a tunnel light camera B-4, a line light source camera B-5, a tunnel light source B-6, and a line light source B-7. The second section of conveyor suction belt B-9 is mounted on the suction conveyor wall plate B-1 of the detection unit via a belt drive roller B-10. The suction conveyor wall plate B-1 of the detection unit is connected to the frame E. A suction chamber B-13 is provided inside the second section of conveyor suction belt B-9, and a suction pipe B-12 is provided on the side of the suction chamber B-13. The second section of conveyor suction belt B-9 extends from the first section of suction conveyor belt A-6. The tunnel light camera B-4, the line light source camera B-5, the tunnel light source B-6, and the line light source B-7 are located above the second section of conveyor suction belt B-9. The tunnel light camera B-4 and the line light source camera B-5 are mounted on the camera mounting wall plate B-3, and the tunnel light source B-6 and the line light source B-7 are mounted on the main detection light source mounting wall plate B-2.

[0032] In other specific embodiments of the present invention, the remainder is the same as the embodiments described above, except that, as follows: Figure 3 As shown, the camera mounting wall plate B-3 is connected to the detection light source mounting main wall plate B-2, and the bottom of the detection light source mounting main wall plate B-2 is connected to the frame E through the shock-absorbing pad B-8.

[0033] In other specific embodiments of the present invention, the remainder is the same as the embodiments described above, except that, as follows: Figure 4 As shown, the waste removal section C includes a third-section suction conveyor belt C-2, a waste-kicking rear suction belt C-9, and a waste-kicking nozzle C-3. The third-section suction conveyor belt C-2 is mounted on the waste-kicking section wall plate C-1 via a belt drive roller C-6 and is driven by a belt drive roller C-5. The waste-kicking section wall plate C-1 is connected to the frame E. The third-section suction conveyor belt C-2 extends from the second-section suction conveyor belt B-9. The waste-kicking rear suction belt C-9 is located behind the third-section suction conveyor belt C-2, with a waste-kicking port C-8 between them. A waste-kicking nozzle C-3 is located above the waste-kicking port C-8 and is mounted on an air nozzle bracket C-7.

[0034] In other specific embodiments of the present invention, the remainder is the same as the embodiments described above, except that, as follows: Figure 4 As shown, there are two sets of pressure rollers C-4 at the waste kicking opening C-8. These serve to facilitate the passage of the label through the waste kicking gap.

[0035] In other specific embodiments of the present invention, the remainder is the same as the embodiments described above, except that, as follows: Figure 5As shown, the receiving section D includes a receiving conveyor belt D-6 and a receiving tray D-7. The receiving conveyor belt D-6 is driven by a belt drive sprocket D-2. The front end of the receiving conveyor belt D-6 is connected to the exhaust belt C-9 at the rear of the waste removal section. A pressure roller D-3 is provided at the connection point to press down and align the labels, preventing the entire row from warping. The pressure roller D-3 is mounted on the support wall plate D-1 via a pressure roller mounting bracket D-4. The support wall plate D-1 is connected to the frame E. The receiving tray D-7 is provided at the rear end of the receiving conveyor belt D-6. Qualified labels that have passed inspection are collected here.

[0036] In other specific embodiments of the present invention, the remainder is the same as the embodiments described above, except that, as follows: Figure 5 As shown, a counting photoelectric sensor C-5 is installed at the junction of the front end of the receiving conveyor belt D-6 and the rear suction belt C-9 for waste removal. This facilitates the counting of tags.

[0037] In other specific embodiments of the present invention, the remainder is the same as the embodiments described above, except that, as follows: Figure 5 As shown, the receiving tray D-7 is equipped with an inclined baffle D-8. This baffle can be adjusted forward and backward to block labeled qualified products for manual handling.

[0038] Based on the above embodiments, the working principle of this invention is as follows: First, a stack of printed labels to be inspected is placed on the storage mechanism A-1. The air distribution valve A-4 controls the suction nozzle A-2 to draw air from the storage mechanism A-1, picking up the labels. The star turntable A-3 rotates, causing the suction nozzle A-2 to rotate synchronously, carrying the labels to the top of the first suction conveyor belt A-6. The air distribution valve A-4 controls the suction nozzle A-2 to blow air, releasing the labels onto the first suction conveyor belt A-6. Then, the labels are sent to the front detection unit B of the camera via the conveyor belt for front detection. The camera captures an image to determine the quality of the product, and then sends it to the waste rejection unit C. Under the coordinated control of the system, when waste enters, the waste kick nozzle C-3 is activated, blowing the waste out of the waste kick outlet C-8 for rejection. When qualified products pass by, they are directly sent to the receiving unit D for collection.

[0039] Note that the above description is merely a preferred embodiment of the present invention. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A label inspection machine, characterized in that, It includes a rotary feeder, a camera front inspection unit, a scrap removal unit, a receiving unit, and a frame; The rotary feeder is located at the front end of the frame and stores and transports the labels to the front detection unit of the camera. The front detection unit of the camera is set on the frame, located behind the rotating feeder. The front detection unit of the camera detects the label to determine the quality of the product and then transports it to the waste removal unit. The defect removal section is installed on the frame, behind the front detection section of the camera. The removal section removes the detected defective products and transports the good products to the receiving section. The receiving section is located on the frame, behind the waste removal section, where good products with labels that have been inspected are gathered and piled up.

2. The label inspection machine according to claim 1, characterized in that, The rotary feeding unit includes a storage mechanism for storing labels, a suction nozzle for picking up labels, a star-shaped turntable, an air distribution valve for controlling the suction nozzle to suck in or blow air, and a first-section suction conveyor belt. The storage mechanism is installed above the frame, with its discharge end tilted downwards and connected to the star-shaped turntable. The star-shaped turntable is equipped with multiple sets of suction nozzles and is rotatable on the frame. The air distribution valve is located on the star-shaped turntable and is connected to each set of suction nozzles via air pipes. The first-section suction conveyor belt is located on the frame, below the star-shaped turntable. The suction nozzles are controlled by the air distribution valve to pick up labels from the storage mechanism. The rotation of the star-shaped turntable drives the suction nozzles to rotate synchronously. The air distribution valve controls the suction nozzles to blow air, releasing the labels onto the first-section suction conveyor belt.

3. A label inspection machine according to claim 2, characterized in that, The suction nozzle is provided in 5 sets.

4. A label inspection machine according to claim 2, characterized in that, The front detection unit of the camera includes a second section of conveyor suction belt, a tunnel light camera, a line light source camera, a tunnel light source, and a line light source. The second section of conveyor suction belt is mounted on the suction conveyor wall plate of the detection unit via belt drive rollers. The suction conveyor wall plate of the detection unit is connected to the frame. A suction chamber is provided inside the second section of conveyor suction belt, and a suction pipe is provided on the side of the suction chamber. The second section of conveyor suction belt extends from the first section of suction conveyor belt. The tunnel light camera, the line light source camera, the tunnel light source, and the line light source are located above the second section of conveyor suction belt. The tunnel light camera and the line light source camera are mounted on the camera mounting wall plate, and the tunnel light source and the line light source are mounted on the main wall plate of the detection light source mounting plate.

5. A label inspection machine according to claim 4, characterized in that, The camera mounting wall panel is connected to the main wall panel for mounting the detection light source, and the bottom of the main wall panel for mounting the detection light source is connected to the frame via a shock-absorbing pad.

6. A label inspection machine according to claim 4, characterized in that, The waste removal section includes a third-section suction conveyor belt, a rear-section waste-kicking suction belt, and a waste-kicking nozzle. The third-section suction conveyor belt is mounted on the waste-kicking section wall panel via a belt drive roller and is driven by a belt drive roller. The waste-kicking section wall panel is connected to the frame, and the third-section suction conveyor belt extends from the second-section suction conveyor belt. The rear-section waste-kicking suction belt is located behind the third-section suction conveyor belt, with a waste-kicking opening between them. A waste-kicking nozzle is located above the waste-kicking opening and is mounted on an air nozzle bracket.

7. A label inspection machine according to claim 6, characterized in that, There are two sets of pressure rollers at the waste outlet.

8. A label inspection machine according to claim 6, characterized in that, The receiving section includes a receiving conveyor belt and a receiving tray; the receiving conveyor belt is driven by a belt drive sprocket, the front end of the receiving conveyor belt is connected to the exhaust belt at the rear of the waste removal section, and a pressure roller for pressing down the labels is provided at the connection point. The pressure roller is mounted on the support wall plate through a pressure roller mounting bracket. The support wall plate is connected to the frame, and a receiving tray is provided at the rear end of the receiving conveyor belt.

9. A label inspection machine according to claim 8, characterized in that, A counting photoelectric device is installed at the junction of the front end of the receiving conveyor belt and the rear suction belt of the waste removal section.

10. A label inspection machine according to claim 8, characterized in that, The receiving tray is equipped with an inclined baffle.

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