Novel automatic rejecting device

Abstract

The utility model discloses a novel automatic defective product removing device which comprises a working table, a conveying belt is arranged on the working table, and an air hole element is arranged below the conveying belt. First and second visual camera groups; first and second light sources; a cylinder; and a pressing rod. The first light source and the second light source are respectively arranged between the first visual camera group and the conveyor belt and between the second visual camera group and the conveyor belt to supplement light for the to-be-detected product so as to assist the first visual camera group and the second visual camera group to obtain a distinct contrast image, so that the accuracy and the stability of detection are effectively improved; and the detection accuracy can be ensured even in an environment with complex light. The air cylinder can pull the conveying belt downwards through the material pressing rod, so that a V-shaped pit is formed in the conveying belt, then defective products fall off, the air hole element can blow air to the defective products to enable the defective products to fall off more smoothly, accumulation and missing detection are effectively avoided, and the device is suitable for automatic rejecting equipment for most defective products.

Description

Technical field:

[0001] The utility model relates to the technical field of machine vision, in particular to a novel automatic defective rejection device. Background technology:

[0002] In modern industrial production, defective products on the production line are inevitable, so quality inspection has become an indispensable and crucial part of industrial production.

[0003] In the past, quality inspections were performed manually by visually identifying products and then selecting defective products, which was inefficient and had unstable quality. To this day, some manufacturers still use manual inspection and screening of products one by one. This method reduces the production efficiency of the assembly line and increases labor costs.

[0004] With the rapid development of science and technology, automated vision technology has become increasingly widely used in fields such as machinery manufacturing, transportation, petrochemicals, and healthcare. In the manufacturing industry, automated vision equipment, through visual inspection systems, automatically inspects product appearance and rejects defective products. This is crucial for industrial product quality inspection, improving production efficiency and maintaining consistent quality.

[0005] Currently, there are quality inspection devices available on the market for packaging production lines that can inspect and remove defective items such as packaging boxes. For example, Chinese utility model patent application number CN218610483U discloses a defective packaging box removal device, which includes a frame body, an image recognition device, an aeration device, a push rod device, a recovery device, and a photoelectric sensor. The frame body is positioned on a first side of a conveyor belt, the image recognition device is positioned at the top of the frame body near the conveyor belt, and is connected to the inner wall of the frame body via an adjustment assembly. The aeration device is positioned on a second side of the conveyor belt, blowing the packaging boxes from the conveyor belt into the frame body, and the push rod device pushes the packaging boxes out of the frame body to the frame body outlet. The recovery device is positioned below the conveyor belt and connected to the frame body outlet via a slide. The photoelectric sensors are positioned longitudinally opposite each other at the frame body outlet. This device can detect whether the printing on the packaging boxes is correct, remove defective packaging boxes promptly if they are found, and ensure accurate inspection results.

[0006] However, this existing packaging box defective product removal device still has the following shortcomings:

[0007] 1. In this technical solution, an aeration device is used to blow the packaging box from the conveyor belt into the frame body, and then the packaging box is pushed out from the inside of the frame body to the outlet of the frame body through a push rod device. With this structure, the packaging box needs to be moved twice to reach the outlet, and accumulation is likely to occur during the process, affecting efficiency. In addition, the conveyor belt is wide and immovable. When two or more defective products appear at the same time, the aeration device will not be able to blow the packaging box from the conveyor belt to the frame body. The defective products are not able to fall off smoothly and are easily missed.

[0008] 2. In this technical solution, the packaging boxes on the product line are mainly inspected by image recognition devices. However, in factories with complex lighting environments, missed inspections and false inspections are very likely to occur. This has significant limitations and is difficult to apply to products that require high precision. A stable light source should be added.

[0009] Assist the image recognition device to enhance the accuracy of detection and improve the accuracy of detection.

[0010] In view of this, the inventors propose the following technical solutions. Utility model content:

[0011] The purpose of the utility model is to overcome the deficiencies of the prior art and provide a novel automatic defective rejecting device.

[0012] In order to solve the above technical problems, the utility model adopts the following technical solutions: a new type of automatic defective rejection device, comprising: a workbench, on which a conveyor belt for transporting products is horizontally arranged, and an air hole element capable of emitting gas to blow defective products away from the conveyor belt is arranged under the conveyor belt; a first and a second visual camera group, which are respectively located on the upper and lower sides of the conveyor belt and are used to detect products; a first and a second light source, which are respectively arranged between the first and the second visual camera group and the conveyor belt and are used to provide fill light for the products; at least one cylinder, which is arranged under the transmission belt; at least one pressing rod, which is arranged on the cylinder and can pull the conveyor belt downward through the drive of the cylinder to make the defective products fall off the conveyor belt.

[0013] Furthermore, in the above technical solution, the workbench is L-shaped, and the workbench includes a supporting portion and an upright portion integrally formed with the supporting portion. The conveyor belt is installed on the upright portion, and the upright portion is provided with a first supporting plate and a second supporting plate for supporting the conveyor belt.

[0014] Furthermore, in the above technical solution, the cylinder is located below the first support plate and the second support plate, the press rod is located between the first support plate and the second support plate, and the air hole element is installed on the lower surface of the second support plate.

[0015] Furthermore, in the above technical solution, the first visual camera group includes a first bracket arranged on the workbench and located above the conveyor belt, and a first camera and a second camera installed on the first bracket and used to take pictures of the products on the conveyor belt.

[0016] Furthermore, in the above technical solution, the second visual camera group includes a second bracket arranged on the workbench and located below the conveyor belt, and a third camera and a fourth camera installed on the second bracket and used to take pictures of the products on the conveyor belt.

[0017] Furthermore, in the above technical solution, the first light source is annular and is arranged between the first visual camera group and the conveyor belt; the second light source is annular and is arranged between the second visual camera group and the conveyor belt.

[0018] Furthermore, in the above technical solution, the conveyor belt includes a first conveyor belt and a second conveyor belt, and the workbench is provided with a first roller and a second roller for changing the direction of the conveyor belt. The first conveyor belt bypasses the first roller and is passed between the first light source and the second light source, and the second conveyor belt bypasses the second roller and is passed between the first light source and the second light source in parallel with the first conveyor belt.

[0019] Furthermore, in the above technical solution, the number of the cylinders is two, and correspondingly, the number of the pressing rods is also two. The pressing rod includes: a lifting arm arranged on the cylinder in a liftable manner and a lever fixed on the lifting arm and used to push the conveyor belt downward.

[0020] Furthermore, in the above technical solution, a roller structure for driving the conveyor belt to move is provided on the workbench, and a positioning frame for positioning the conveyor belt is also provided on the workbench. The conveyor belt passes through the middle of the roller structure and is transferred to the next workstation through the positioning frame.

[0021] After adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art: In the present invention, the first and second light sources are respectively set between the first and second visual camera groups and the conveyor belt to supplement the light for the product to be inspected, so as to assist the first and second visual camera groups and obtain a sharp contrast image, thereby effectively improving the accuracy and stability of the inspection, and ensuring the accuracy of the inspection even in a complex lighting environment. In addition, compared with the existing structure, the cylinder in the present invention can pull the conveyor belt downward through the pressing rod, so that the conveyor belt forms a "V"-shaped depression, thereby causing defective products to fall off, and the air hole element will also blow air on the defective products to make them fall off more smoothly, and the defective products only move once during the process, reducing the level, effectively avoiding accumulation and missed inspections, and are suitable for most automatic rejection equipment for defective products. Description of the drawings:

[0022] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0023] Figure 2 yes Figure 1 Enlarged view at point A;

[0024] Figure 3 It is a three-dimensional structural diagram of another viewing angle in the utility model;

[0025] Figure 4 yes Figure 3 Enlarged view at point B;

[0026] Figure 5 This utility model

[0027] Figure 6 It is the main view of the utility model;

[0028] Figure 7 yes Figure 6 Enlarged view at C. Specific implementation method:

[0029] The present invention will be further described below with reference to specific embodiments and accompanying drawings.

[0030] See Figures 1 to 7 The figure shows a novel automatic defective rejection device, comprising: a workbench 1, on which a conveyor belt 4 for transporting products is disposed transversely. Below the conveyor belt 4 is an air hole element 5 capable of emitting air to blow defective products off the conveyor belt; first and second visual camera groups 21 and 22, respectively located above and below the conveyor belt 4, for inspecting products; and first and second light sources 31 and 32, respectively located between the first and second visual camera groups 21 and 22 and the conveyor belt 4, for providing supplemental lighting for the products. In this embodiment, the first and second light sources 31 and 32 are YL annular white light sources, which assist the first and second visual camera groups 21 and 22 in obtaining sharp contrast images, effectively improving inspection accuracy. At least one air cylinder 6 is disposed below the conveyor belt 4; and at least one pusher 7 is disposed on the air cylinder 6 and, driven by the air cylinder 6, pulls the conveyor belt 4 downward, causing defective products to fall off the conveyor belt 4.

[0031] In the present invention, the first and second light sources 31 and 32 are respectively arranged between the first and second visual camera groups 21 and 22 and the conveyor belt 4 to provide fill light for the product to be inspected, so as to assist the first and second visual camera groups 21 and 22 in obtaining a sharp contrast image, thereby effectively improving the accuracy and stability of the inspection, and ensuring the accuracy of the inspection even in a complex lighting environment.

[0032] In addition, combined Figure 7 As shown, compared with the existing structure, the cylinder 6 in the utility model can pull the conveyor belt 4 downward through the pressing rod 7, so that the conveyor belt 4 forms a "V"-shaped depression, thereby causing defective products to fall off, and the air hole element 5 will also blow air on the defective products to make them fall off more smoothly, and the defective products only move once during the process, reducing the level, effectively avoiding accumulation and missed inspections, and are suitable for most defective product automatic rejection equipment.

[0033] The workbench 1 is L-shaped and includes a support portion 11 and an upright portion 12 integrally formed with the support portion 11. The conveyor belt 4 is mounted on the upright portion 12, and the upright portion 12 is provided with a first supporting plate 81 and a second supporting plate 82 for supporting the conveyor belt 4. Here, preferably, the angle between the support portion 11 and the upright portion 12 is 90°. The support portion 11 can be placed on the ground or other flat surface to ensure that the equipment stands firmly. The first supporting plate 81 and the second supporting plate 82 are both fixed to the upright portion 12 and located above the support portion 11 to maintain a balanced center of gravity. The first supporting plate 81 and the second supporting plate 82 are located in the middle section of the conveyor belt 4 and support it to prevent it from falling.

[0034] See Figure 6 and Figure 7 As shown, the air cylinder 6 is located below the first and second support plates 81, 82, the press rod 7 is located between the first and second support plates 81, 82, and the air hole element 5 is mounted on the lower surface of the second support plate 82. Here, when the press rod 7 is pressed down, it pulls the conveyor belt 4 downward, forming a "V"-shaped depression, causing defective products to fall off. In addition, the air hole element 5 can output air to blow away the defective products in the conveyor belt 4, adding a force to make them fall off more smoothly.

[0035] See Figure 1 and Figure 3As shown, the first visual camera group 21 includes a first bracket 210 disposed on the workbench 1 and above the conveyor belt 4, and a first camera 211 and a second camera 212 mounted on the first bracket 210 for photographing and collecting images of products on the conveyor belt 4. The second visual camera group 22 includes a second bracket 220 disposed on the workbench 1 and below the conveyor belt 4, and a third camera 221 and a fourth camera 222 mounted on the second bracket 220 for photographing and collecting images of products on the conveyor belt 4. In this embodiment, preferably, two groups of two cameras are used, each group comprising four cameras, to photograph products on the conveyor belt 4 and obtain defective information. This allows for comprehensive and accurate collection of defective information. When defective information is detected on products on the conveyor belt 4, the collected defective information is further transmitted to the system, which issues an instruction to remove defective products. Furthermore, the press rod 7 and the air hole element 5 cooperate to remove the defective products from the conveyor belt 4.

[0036] The first light source 31 is annular and positioned between the first visual camera group 21 and the conveyor belt 4; the second light source 32 is annular and positioned between the second visual camera group 22 and the conveyor belt 4. The annular light source provides more uniform fill light for the product. Furthermore, the lens of the first camera 211 is aligned with the circular hole in the center of the annular first light source 31, allowing the camera to capture images through this hole to maximize fill light. Similarly, the lens of the third camera 221, located below the conveyor belt 4, is aligned with the circular hole in the center of the annular second light source 32, allowing the camera to capture images through this hole.

[0037] The conveyor belt 4 includes a first conveyor belt 41 and a second conveyor belt 42. The workbench 1 is provided with a first roller 91 and a second roller 92 for changing the direction of the conveyor belt 4. The first conveyor belt 41 passes around the first roller 91 and is arranged between the first light source 31 and the second light source 32. The second conveyor belt 42 passes around the second roller 92 and is arranged parallel to the first conveyor belt 41 between the first light source 31 and the second light source 32. Here, the first conveyor belt 41 and the second conveyor belt 42 are capable of being rolled up and stored. The workbench 1 is provided with a first receiving tray 47 and a second receiving tray 48 for accommodating the first conveyor belt 41 and the second conveyor belt 42, respectively. The first conveyor belt 41 is pulled out of the first receiving tray 47. The space between the first conveyor belt 41 and the first receiving tray 47 is similar to that between a roll of paper and a paper towel rack, and the first conveyor belt 4 can be pulled out.

[0038] There are two cylinders 6, and correspondingly, there are two push rods 7. The push rods 7 include a lifting arm 71 that is escalably mounted on the cylinder 6, and a lever 72 that is fixed to the lifting arm 71 and is used to push the conveyor belt 4 downward. Preferably, the angle between the lever 72 and the lifting arm 71 is 90°-120°, which is close to a vertical angle and can effectively pull the conveyor belt 4 downward.

[0039] The workbench 1 is provided with a roller structure 93 for driving the conveyor belt 4 to move, and the workbench 1 is also provided with a positioning frame 94 for positioning the conveyor belt 4. The conveyor belt 4 passes through the middle of the roller structure 93 and is transferred to the next workstation through the positioning frame 94.

[0040] To sum up, in the present invention, the first and second light sources 31 and 32 are respectively arranged between the first and second visual camera groups 21 and 22 and the conveyor belt 4 to provide fill light for the product to be inspected, so as to assist the first and second visual camera groups 21 and 22 in obtaining a clear contrast image, thereby effectively improving the accuracy and stability of the inspection, and ensuring the accuracy of the inspection even in a complex lighting environment.

[0041] In addition, compared with the existing structure, the cylinder 6 in the utility model can pull the conveyor belt 4 downward through the pressing rod 7, so that the conveyor belt 4 forms a "V"-shaped depression, thereby causing defective products to fall off, and the air hole element 5 will also blow air on the defective products to make them fall off more smoothly, and the defective products only move once during the process, reducing the level, effectively avoiding accumulation and missed inspections, and are suitable for most defective product automatic rejection equipment.

[0042] Of course, the above description is only a specific embodiment of the present invention and is not intended to limit the scope of implementation of the present invention. Any equivalent changes or modifications made based on the structure, features and principles described in the scope of the patent application of the present invention should be included in the scope of the patent application of the present invention.

Claims

1. A new type of automatic defective rejection device, characterized in that: include: A workbench (1) is provided with a conveyor belt (4) for transporting products transversely disposed on the workbench (1), and an air hole element (5) capable of emitting air to blow defective products away from the conveyor belt is provided below the conveyor belt (4); First and second visual camera groups (21, 22), which are respectively located on the upper and lower sides of the conveyor belt (4) and are used to inspect products; First and second light sources (31, 32), which are respectively arranged between the first and second visual camera groups (21, 22) and the conveyor belt (4) and are used to provide supplementary light for the product; at least one air cylinder (6) disposed below the conveyor belt (4); At least one pressing rod (7) is arranged on the cylinder (6) and can pull the conveyor belt (4) downward through the drive of the cylinder (6) to make defective products fall off the conveyor belt (4).

2. The novel automatic defective rejection device according to claim 1 is characterized in that: The workbench (1) is L-shaped and comprises a supporting portion (11) and an upright portion (12) integrally formed with the supporting portion (11); the conveyor belt (4) is mounted on the upright portion (12), and the upright portion (12) is provided with a first supporting plate (81) and a second supporting plate (82) for supporting the conveyor belt (4).

3. The novel automatic defective rejection device according to claim 2 is characterized in that: The cylinder (6) is located below the first supporting plate (81) and the second supporting plate (82), the pressing rod (7) is located between the first supporting plate (81) and the second supporting plate (82), and the air hole element (5) is installed on the lower surface of the second supporting plate (82).

4. The novel automatic defective rejection device according to claim 1 is characterized in that: The first visual camera group (21) comprises a first bracket (210) arranged on the workbench (1) and located above the conveyor belt (4), and a first camera (211) and a second camera (212) mounted on the first bracket (210) and used for taking photos of products on the conveyor belt (4).

5. The novel automatic defective rejection device according to claim 1 is characterized in that: The second visual camera group (22) includes a second bracket (220) arranged on the workbench (1) and located below the conveyor belt (4), and a third camera (221) and a fourth camera (222) installed on the second bracket (220) and used for taking photos of products on the conveyor belt (4).

6. A novel automatic defective rejection device according to any one of claims 1 to 5, characterized in that: The first light source (31) is annular and is arranged between the first visual camera group (21) and the conveyor belt (4); the second light source (32) is annular and is arranged between the second visual camera group (22) and the conveyor belt (4).

7. A novel automatic defective rejection device according to any one of claims 1 to 5, characterized in that: The conveyor belt (4) includes a first conveyor belt (41) and a second conveyor belt (42); a first roller (91) and a second roller (92) for changing the direction of the conveyor belt (4) are provided on the workbench (1); the first conveyor belt (41) passes around the first roller (91) and is arranged between the first light source (31) and the second light source (32); the second conveyor belt (42) passes around the second roller (92) and is arranged between the first light source (31) and the second light source (32).

8. A novel automatic defective rejection device according to any one of claims 1 to 5, characterized in that: There are two cylinders (6), and correspondingly, there are also two pressing rods (7). The pressing rod (7) comprises a lifting arm (71) arranged on the cylinder (6) in a liftable manner and a shifting rod (72) fixed on the lifting arm (71) and used to shift the conveyor belt (4) downward.

9. The novel automatic defective rejection device according to claim 1 is characterized in that: The workbench (1) is provided with a roller structure (93) for driving the conveyor belt (4) to move, and the workbench (1) is also provided with a positioning frame (94) for positioning the conveyor belt (4). The conveyor belt (4) passes through the middle of the roller structure (93) and is transferred to the next workstation through the positioning frame (94).

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