Labeling machine vision detection device

Abstract

The utility model discloses a kind of labeller vision detection devices, including workbench, conveying belt is equipped on the workbench, the side of conveying belt is equipped with vision detection component, the vision detection component includes the base in the side of conveying belt, sliding seat is slidably equipped on the base, the side of sliding seat close to conveying belt is symmetrically equipped with compression wheel, the other side of sliding seat is equipped with driving device, the other side of base is equipped with first support frame and second support frame on conveying belt, detection camera is equipped between first support frame and second support frame, the side of first support frame close to conveying belt is rotatably equipped with driving wheel, the side of first support frame close to conveying belt is rotatably equipped with auxiliary wheel. The scheme can realize stable fitting and high-precision vision detection in product rotation process, to improve the accuracy of labelling detection and production efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of labeling machine technology, and specifically relates to a visual inspection device for labeling machines. Background Technology

[0002] A labeling machine's vision inspection device refers to a device that inspects the labels on a product after labeling has been completed. Existing labeling machine vision inspection devices mostly employ a fixed inspection method when inspecting disc-shaped products. Specifically, after the product is conveyed to the inspection position via a conveyor belt, it is typically photographed and identified by a camera at a single angle. The product remains stationary during the inspection process or is supported and fixed by only one side of the mechanism. While this inspection method has a relatively simple structure, its inspection angle is limited, making it impossible to achieve dynamic and comprehensive inspection of the product's outer perimeter.

[0003] For disc-shaped products, the label is typically wrapped around the outer circumference of the product. Since the label attachment surface is a continuous curved or circular surface, if only a static detection method at a fixed angle is used, the camera can only capture images of a localized area of ​​the product's outer surface, failing to cover the entire label area. When defects such as wrinkles, curling edges, breaks, or misalignment exist on the label in areas not captured by the camera, the detection system cannot identify them in time, leading to missed detections or misjudgments, thus affecting the accuracy of the detection results.

[0004] Due to the lack of product rotation or multi-angle detection mechanisms, the detection accuracy is limited, making it difficult to comprehensively assess the label attachment status. This not only affects product appearance consistency and labeling quality but may also lead to defective products entering subsequent processes or the market, reducing the overall level of production quality control. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides a visual inspection device for a labeling machine, comprising a worktable with a conveyor belt on the worktable and a visual inspection component on the side of the conveyor belt. The visual inspection component includes a base located on one side of the conveyor belt, a sliding seat slidably mounted on the base, and pressure wheels symmetrically mounted on the sliding seat near the conveyor belt. A driving device is mounted on the other side of the sliding seat. A first support frame and a second support frame are mounted on the conveyor belt on the opposite side of the base. A detection camera is mounted between the first support frame and the second support frame. A drive wheel is rotatably mounted on the first support frame near the conveyor belt, and an auxiliary wheel is rotatably mounted on the first support frame near the conveyor belt.

[0006] Preferably, the first support frame has a U-shaped cross-section, a rotating shaft is provided in the middle of the first support frame, the drive wheel is provided on the rotating shaft, a drive motor is provided on the side of the first support frame, and a transmission belt is connected between the output end of the drive motor and the rotating shaft.

[0007] Preferably, the conveyor belt is provided with a first stop assembly on its side. The first stop assembly includes a first stop motor. The output end of the first stop motor is connected to a first drive plate. A first stop rod is vertically provided on the first drive plate. The vision detection assembly and the first stop assembly are arranged sequentially along the flow direction.

[0008] Preferably, a second stop assembly is provided on the side of the conveyor belt. The second stop assembly includes a second stop motor. The output end of the second stop motor is connected to a second drive plate. A second stop rod is vertically provided on the drive plate. The second stop assembly, the vision detection assembly, and the first stop assembly are arranged sequentially along the flow direction.

[0009] Preferably, a sliding plate is slidably provided on the sliding seat, the pressure wheel is provided on the sliding plate, a protrusion is provided at one end of the sliding seat near the driving device, and a buffer spring is provided between the protrusion and the sliding plate.

[0010] The advantages of this utility model are: 1. This solution uses a drive wheel to rotate a disc-shaped product, causing the label wrapped around its outer surface to be continuously photographed by a detection camera during rotation, thus achieving 360° full-circle inspection of the label. Compared to traditional fixed inspection methods that can only acquire partial images, this solution can completely capture the attachment status of the entire label, effectively identifying defects such as wrinkles, curling edges, overlaps, and misalignments, significantly improving the accuracy and reliability of visual inspection.

[0011] 2. This solution achieves multi-angle detection using a single detection camera and a rotating drive wheel, eliminating the need for a complex system with multiple cameras arranged in a ring. This significantly simplifies the overall structure and reduces manufacturing and maintenance costs. Furthermore, through the coordinated control of the first and second stop components, the pace of product entry and exit from the detection area is precisely controllable, enabling seamless integration with high-speed conveyor lines and meeting the automated detection requirements of continuous production.

[0012] 3. This device uses clamping wheels, drive wheels, and auxiliary wheels to symmetrically clamp the product, and a buffer spring structure is installed at the connection of the clamping wheels to automatically adjust the clamping pressure according to the product size and thickness. This design prevents the product from slipping or shifting, and avoids deformation or scratches caused by excessive clamping, making the product rotate more smoothly and the detection image clear and stable. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the present utility model.

[0014] Figure 2 This is a structural diagram of the tableless design of this utility model.

[0015] Figure 3This is a structural diagram of the visual inspection component of this utility model.

[0016] Figure 4 This is a diagram showing the working state of this utility model.

[0017] In the diagram: 1. Workbench, 2. Conveyor belt, 3. Base, 4. Sliding seat, 5. Pressure wheel, 6. Drive device, 7. First support frame, 8. Second support frame, 9. Detection camera, 10. Drive wheel, 11. Auxiliary wheel, 12. Rotating shaft, 13. Drive motor, 14. Transmission belt, 15. First stop motor, 16. First drive plate, 17. First stop rod, 18. Second stop motor, 19. Second drive plate, 20. Second stop rod, 21. Sliding plate, 22. Protrusion, 23. Buffer spring, 24. Workpiece. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0019] In the description of this utility model, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "both ends", "one end", "the other end", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Simultaneously, when an component is referred to as "fixed to" or "equipped on" another component, it can be directly on the other component or may have an intervening component present. When an component is referred to as "connected to" another component, it can be directly connected to the other component or may have an intervening component present. When an component is referred to as "fixedly connected to" another component, it can be a common fixed connection method such as welding, bolting, or gluing. In short, those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] Example 1, as Figure 1 As shown, a visual inspection device for a labeling machine is used to inspect the application quality of labels wrapped around the outer periphery of a disc-shaped workpiece 24. Combined with... Figure 2The labeling machine vision inspection device in this embodiment includes a worktable 1, on which a conveyor belt 2 is mounted. The conveyor belt 2 transports the labeled disc-shaped products to the vision inspection area. A vision inspection component is located on one side of the conveyor belt 2. The vision inspection component includes a base 3 located on one side of the conveyor belt 2, and a sliding seat 4 is slidably mounted on the base 3. Two pressure rollers 5 are symmetrically arranged on the side of the sliding seat 4 closest to the conveyor belt 2. These rollers cooperate with a drive roller 10 and an auxiliary roller 11 on the other side of the conveyor belt 2 to clamp and limit the two edges of the disc-shaped product, thereby ensuring the stability of the product during inspection. A drive device 6 is located on the other side of the sliding seat 4. The drive device 6 drives the sliding seat 4 to move along the base 3 to adjust the contact pressure between the pressure rollers 5 and the outer surface of the product, thus adapting to disc products of different thicknesses or diameters. The drive device 6 can be an existing drive product such as a hydraulic rod.

[0022] A first support frame 7 and a second support frame 8 are arranged on the conveyor belt 2 on the opposite side of the base 3, with a detection camera 9 installed between them. The detection camera 9 is used to acquire image information of the label during product rotation and to determine indicators such as label integrity, flatness, and positional deviation through image processing algorithms. The first support frame 7 and the second support frame 8 together form a detection channel to ensure the stability of the camera's imaging angle.

[0023] The first support frame 7 has a U-shaped cross-section, with a rotating shaft 12 located in the center. A drive wheel 10 is mounted on the rotating shaft 12, and the drive wheel 10 contacts the outer edge of the product through friction to drive the product to rotate. A drive motor 13 is mounted on the side of the first support frame 7, and the output end of the drive motor 13 is connected to the rotating shaft 12 via a transmission belt 14. When the drive motor 13 starts, it drives the transmission belt 14 to rotate, thereby driving the rotating shaft 12 and the drive wheel 10 on it to rotate, which in turn drives the disc-shaped product clamped between the pressure wheels 5 to rotate. During the product rotation, the detection camera 9 can continuously capture images of the label around the product's periphery, achieving visual inspection of the label's full circumference adhesion status.

[0024] To ensure precise positioning of the product within the inspection area, this embodiment also includes a first stop assembly on the side of the conveyor belt 2. The first stop assembly includes a first stop motor 15, the output of which is connected to a first drive plate 16. A first stop rod 17 is vertically mounted on the drive plate. The first stop rod 17 can extend or retract under motor drive to limit the product on the conveyor belt 2. The vision inspection assembly and the first stop assembly are arranged sequentially along the product flow direction. When the workpiece 24 is conveyed to the vision inspection area, the first stop rod 17 extends to block and position the workpiece 24, keeping it above the inspection position. At this time, the clamping wheel 5, drive wheel 10, and auxiliary wheel 11 together clamp the workpiece 24, ensuring that it does not deviate during rotation. After inspection, the stop rod retracts, and the workpiece 24 continues to be output along the conveyor belt 2.

[0025] To further improve inspection efficiency and prevent mutual interference between workpieces 24, a second stop assembly is also provided on the other side of the conveyor belt 2. The second stop assembly includes a second stop motor 18, the output of which is connected to a second drive plate 19, on which a second stop rod 20 is vertically mounted. The second stop assembly, the vision inspection assembly, and the first stop assembly are arranged sequentially along the conveying direction. The second stop assembly is used to temporarily block the previous workpiece 24 before it enters the inspection area, thus retaining only a single workpiece 24 for vision inspection in the inspection area, preventing multiple workpieces 24 from entering the inspection area simultaneously and affecting inspection accuracy. After inspection, the second stop rod 20 retracts, allowing the next workpiece 24 to enter the inspection area, achieving automated control of continuous inspection.

[0026] To make the clamping process more flexible and buffered, a sliding plate 21 is slidably mounted on the sliding seat 4, and the clamping wheel 5 is mounted on the sliding plate 21. A protrusion 22 is provided at the end of the sliding seat 4 near the drive device 6, and a buffer spring 23 is installed between the protrusion 22 and the sliding plate 21. When the sliding seat 4 moves under the drive of the drive device 6, the buffer spring 23 can elastically deform when the clamping wheel 5 contacts the workpiece 24, thereby automatically adjusting the clamping force. This structure not only prevents deformation or scratches of the workpiece 24 due to excessive clamping, but also maintains a constant clamping pressure even when there are slight deviations in the dimensions of the workpiece 24, ensuring stable and smooth rotation of the workpiece 24 and guaranteeing the clarity and consistency of the inspection images.

[0027] In this embodiment, during operation, workpiece 24 is conveyed to the front of the inspection area via conveyor belt 2 and initially limited by the second stop assembly. When the inspection area is empty, the second stop rod 20 retracts, and workpiece 24 is conveyed to the area below the vision inspection assembly. Subsequently, the first stop rod 17 extends, positioning workpiece 24 in the inspection area. The clamping wheel 5, drive wheel 10, and auxiliary wheel 11 work together to clamp workpiece 24. After the drive motor 13 starts, it drives the drive wheel 10 to rotate, thereby causing the disc-shaped workpiece 24 to rotate along its own central axis. The inspection camera 9 continuously acquires images during the rotation of workpiece 24, obtaining full-coverage visual data of the label on the outer periphery of workpiece 24. The system can determine whether the label has defects such as wrinkles, bubbles, detachment, misalignment, or overlap through image analysis, and outputs the inspection results. After the inspection is completed, the drive device 6 releases the clamping wheel 5, the first stop rod 17 retracts, and workpiece 24 is carried away from the inspection area by conveyor belt 2 to enter the next process.

[0028] Through the above structural design, the labeling machine vision inspection device of this embodiment can achieve omnidirectional image inspection during the rotation of the workpiece 24, avoiding the shortcomings of traditional fixed inspection methods that can only capture local label areas. Since the workpiece 24 is rotating during inspection, the inspection camera 9 can complete a 360° full scan of the label without moving, greatly improving inspection accuracy and efficiency. At the same time, the cooperation of the pressure wheel 5, drive wheel 10 and auxiliary wheel 11 ensures that the workpiece 24 rotates smoothly, is not prone to slippage or deviation, and ensures stability during image acquisition. The device of this embodiment only requires a single camera to complete full-circumference label inspection, with a simpler structure, smaller footprint, lower cost, and easier installation and maintenance. Due to the use of stop components for precise positioning, the inspection cycle and conveying speed can be coordinated and controlled, making it suitable for high-speed automated production lines. The setting of the buffer spring 23 further improves the flexible adjustment performance of the pressure wheel 5, making the device compatible with disc workpieces 24 of different thicknesses and diameters, thus expanding its application range.

[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A visual inspection device for a labeling machine, characterized in that: The system includes a workbench (1), a conveyor belt (2) on the workbench (1), a vision inspection component on the side of the conveyor belt (2), a base (3) on one side of the conveyor belt (2), a sliding seat (4) on the base (3), a pressure wheel (5) symmetrically arranged on the side of the sliding seat (4) near the conveyor belt (2), a drive device (6) on the other side of the sliding seat (4), a first support frame (7) and a second support frame (8) on the other side of the conveyor belt (2) opposite to the base (3), a detection camera (9) between the first support frame (7) and the second support frame (8), a drive wheel (10) rotatably arranged on the side of the first support frame (7) near the conveyor belt (2), and an auxiliary wheel (11) rotatably arranged on the side of the first support frame (7) near the conveyor belt (2).

2. The labeling machine visual inspection device according to claim 1, characterized in that: The first support frame (7) has a U-shaped cross section. A rotating shaft (12) is provided in the middle of the first support frame (7). The drive wheel (10) is located on the rotating shaft (12). A drive motor (13) is provided on the side of the first support frame (7). A transmission belt (14) is connected between the output end of the drive motor (13) and the rotating shaft (12).

3. The labeling machine visual inspection device according to claim 2, characterized in that: The conveyor belt (2) is provided with a first stop assembly on its side. The first stop assembly includes a first stop motor (15). The output end of the first stop motor (15) is connected to a first drive plate (16). A first stop rod (17) is vertically provided on the first drive plate (16). The visual detection assembly and the first stop assembly are arranged sequentially along the flow direction.

4. The labeling machine visual inspection device according to claim 3, characterized in that: The conveyor belt (2) is provided with a second stop assembly on its side. The second stop assembly includes a second stop motor (18). The output end of the second stop motor (18) is connected to a second drive plate (19). A second stop rod (20) is vertically provided on the drive plate. The second stop assembly, the vision detection assembly and the first stop assembly are arranged in sequence along the flow direction.

5. The labeling machine visual inspection device according to claim 4, characterized in that: A sliding plate (21) is slidably provided on the sliding seat (4), and the pressing wheel (5) is provided on the sliding plate (21). A protrusion (22) is provided on one end of the sliding seat (4) near the driving device (6), and a buffer spring (23) is provided between the protrusion (22) and the sliding plate (21).

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