Follow-up bottle cap peripheral defect detection device

Abstract

The utility model provides a follow-up bottle cap peripheral defect detection device which comprises a mounting platform, a wheel disc frame and a first driver for driving the wheel disc frame to rotate horizontally are rotationally connected to the mounting platform, a cap moving unit is arranged on the wheel disc frame and comprises a tray, and the tray is rotationally connected to the wheel disc frame and can rotate horizontally. The top surface of the tray is used for supporting bottle caps; a follow-up frame and a second driver for driving the follow-up frame to swing are further arranged on the mounting platform, the follow-up frame and the wheel disc frame swing coaxially, and an image acquisition unit is arranged on the follow-up frame and can continuously acquire images of the outer side face of the bottle cap to be detected in the rotating process of the bottle cap. According to the device, the wheel disc frame and the tray drive the bottle cap to revolve and rotate at the same time, so that no blind area exists in image acquisition of the outer side face of the bottle cap, the image acquisition unit synchronously moves with the bottle cap during image acquisition through the follow-up frame and keeps relatively static to acquire clear images, the rotating speed of the wheel disc can be trustingly increased, and the detection speed and efficiency are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of bottle cap detection devices, specifically a follow-up bottle cap peripheral defect detection device. Background Technology

[0002] Bottle cap inspection is an important test for the quality of bottled products. Among them, the inspection of defects on the outer surface of the bottle cap is one of the test contents. The quality of the outer surface of the bottle cap directly affects the appearance of the bottled product and consumers' impression of the product quality control, and even affects the economic benefits of the product.

[0003] Currently, the inspection of the outer surface of bottle caps uses a linear conveyor line with multiple cameras on both sides. When the bottle cap passes the focusing position of a camera, the multiple cameras simultaneously and instantaneously capture images of the bottle cap's side. However, even with multiple cameras, there are still blind spots in the conveying direction because the cameras are located on both sides of the conveyor line, which can easily lead to missed defects. Furthermore, the bottle cap cannot be moved too quickly, otherwise a clear image cannot be obtained, which also results in low inspection efficiency. Utility Model Content

[0004] To address the technical problems mentioned above, this utility model provides a follow-up bottle cap peripheral defect detection device.

[0005] The technical solution of this utility model is as follows:

[0006] A follow-up bottle cap peripheral defect detection device includes an installation platform, on which a wheel frame and a first drive motor for driving the wheel frame to rotate horizontally are rotatably connected. The wheel frame is provided with a cap-moving unit, which includes a tray. The tray is rotatably connected to the wheel frame and can rotate horizontally. The top surface of the tray is used to support the bottle cap.

[0007] The mounting platform is also equipped with a follower frame and a second drive motor that drives the follower frame to swing. The follower frame swings coaxially with the wheel frame. The follower frame is equipped with an image acquisition unit, which is set to continuously acquire images of the outer side of the bottle cap to be inspected during the rotation of the bottle cap.

[0008] This device uses a rotating wheel frame to drive bottle caps in a revolution, allowing them to pass the image acquisition unit. Simultaneously, the bottle caps rotate on their own axis via a tray, enabling the image acquisition unit to capture a complete image of the bottle cap's side, avoiding blind spots. During image acquisition, a follower frame drives the image acquisition unit to rotate synchronously with the rotating wheel frame, ensuring that the bottle caps and the image acquisition unit have the same directional speed, with zero relative speed. This allows the bottle caps to maintain a relatively fast transport speed during inspection, while the image acquisition unit still obtains clear images without reducing the transport speed, thus improving the efficiency of bottle cap inspection.

[0009] In the above scheme, the wheel frame is equipped with multiple cover-moving units, which are evenly spaced around the wheel frame's rotation axis.

[0010] In the above scheme, the image acquisition unit is located radially outside the wheel frame, and its height corresponds to the top surface of the tray.

[0011] Furthermore, the image acquisition unit includes a line scan light source and a line scan camera. The line scan light source is used to illuminate the bottle cap to be inspected. The line scan light source is provided with a vertical linear aperture. The line scan camera is located behind the line scan light source and is configured to acquire side images of the bottle cap to be inspected through the linear aperture.

[0012] Furthermore, the image acquisition unit also includes a surface light source and a surface scanning camera, which are located on one side of the swing direction of the surface light source and the surface scanning camera, respectively. The surface scanning camera is located above the surface light source. The surface light source is configured to illuminate the bottle cap under inspection at an angle upwards, and the surface scanning camera is configured to acquire the side image of the bottle cap under inspection at an angle downwards.

[0013] Furthermore, the area scanning camera and the line scanning camera are configured to simultaneously acquire images of two adjacent bottle caps to be inspected.

[0014] In some embodiments, the mounting platform is provided with a drive shaft, the wheel frame is fixedly connected to the drive shaft, the follower frame is rotatably connected to the drive shaft and located below the wheel frame, and the first drive motor is drivenly connected to the drive shaft.

[0015] In some embodiments, the cover-moving unit also includes a vertical sliding shaft located directly above the tray and vertically slidably connected to the wheel frame. The sliding shaft is provided with a push rod, and the mounting platform is also provided with a lifting assembly. The lifting assembly is located on the trajectory of the push rod as it rotates with the wheel frame and is configured to lift the sliding shaft by pushing the push rod. A pressure head is rotatably connected to the lower end of the sliding shaft.

[0016] Furthermore, the wheel frame includes a lower wheel and an upper wheel connected above the lower wheel. The upper wheel includes an annular vertical plate and a horizontal plate connecting the upper and / or lower edges of the annular vertical plate. The tray is rotatably connected to the lower wheel, and the sliding shaft is slidably connected to the horizontal plate. The annular vertical plate is provided with a limiting hole corresponding to the position of the sliding shaft, and the push rod is located in the limiting hole.

[0017] Furthermore, the sliding shaft and the lifting assembly are located on the inner and outer sides of the annular vertical plate, respectively. The lifting assembly includes a horizontally extending convex rib with inclined surfaces at both ends and a flat surface at the top. The lowest position of the push rod is located between the top and bottom of the convex rib.

[0018] This utility model provides a follow-up bottle cap peripheral defect detection device, which, through a wheel frame and a cap-moving unit, can make the bottle cap rotate while being transported, so that the image acquisition unit can acquire a complete image of the side of the bottle cap and avoid blind spots in image acquisition.

[0019] In addition, the circular motion method for conveying bottle caps facilitates the setup of a follower frame and image acquisition unit that move at the same speed and in the same direction. The follower motion method can reduce the relative speed between the bottle cap and the follower frame to zero, ensuring that even if the bottle cap maintains a high conveying speed, the image acquisition unit can still obtain a clear image of the side of the bottle cap. Moreover, the conveying of the bottle cap does not need to be stopped, realizing continuous conveying and continuous detection of bottle caps, and improving the detection efficiency of the outer side of the bottle cap. Attached Figure Description

[0020] In the attached diagram:

[0021] Figure 1 This is a front view schematic diagram of the detection device;

[0022] Figure 2 This is an isometric schematic diagram of the detection device;

[0023] Figure 3 This is a schematic diagram of the servo frame and the image acquisition unit;

[0024] Figure 4 Another perspective schematic diagram of the servo frame and image acquisition unit;

[0025] Figure 5 This is a cross-sectional view of the cover-moving unit.

[0026] The components represented by the various reference numerals in the diagram are:

[0027] 1. Mounting platform; 2. Wheel frame; 21. Lower wheel; 22. Upper wheel; 221. Annular vertical plate; 2211. Limiting hole; 222. Horizontal plate; 223. Support rod; 224. Linear bearing; 3. First drive motor; 41. Tray; 42. Sliding shaft; 43. Push rod; 44. Pressure head; 441. Bearing seat; 442. Pressure plate; 45. Spring; 46. Follower wheel; 47. Rolling bearing; 48. Rotating shaft; 49. Synchronous belt pulley 51. Follower frame; 511. Arc rack; 512. Trigger plate; 513. Limit photoelectric sensor; 514. Mechanical positioning block; 515. Mechanical positioning column; 52. Second drive motor; 53. Image acquisition unit; 531. Line scan light source; 532. Line scan camera; 533. Area light source; 534. Area scan camera; 6. Drive shaft; 7. Lifting assembly; 71. Protruding strip; 81. Synchronous belt; 82. Idler pulley; 83. Drive motor. Detailed Implementation

[0028] like Figure 1 and Figure 2 As shown, this utility model embodiment provides a follow-up bottle cap peripheral defect detection device, including an installation platform 1. Generally, a frame or box can be set below the installation platform 1 to support the installation platform 1.

[0029] The mounting platform 1 is rotatably connected to a wheel frame 2 and a first drive motor 3 that drives the wheel frame 2 to rotate horizontally. The wheel frame 2 is equipped with a cap-moving unit, which includes a tray 41. The tray 41 is rotatably connected to the wheel frame 2 and can rotate horizontally. The top surface of the tray 41 is used to support the bottle cap. Multiple cap-moving units are provided and are evenly distributed around the rotation axis 48 of the wheel frame 2.

[0030] The mounting platform 1 is also equipped with a follower frame 51 and a second drive motor 52 that drives the follower frame 51 to swing. The follower frame 51 swings coaxially with the wheel frame 2. The follower frame 51 is equipped with an image acquisition unit 53, which is configured to continuously acquire images of the outer side of the bottle cap to be inspected during the rotation of the bottle cap.

[0031] In addition, the detection device of this application is equipped with a bottle cap conveying device for moving bottle caps onto and off the tray 41. This bottle cap conveying device is not the focus of this application, so it will not be described in detail here. Those skilled in the art can refer to the existing conveying devices that can realize the above-mentioned moving or removing of bottle caps, such as robotic arms or cap entry and exit star wheels.

[0032] When the bottle cap is moved in and out, the detection device of this application requires the tray 41 to stop rotating in order to facilitate the movement of the bottle cap. For this purpose, in the 360 ​​degrees of rotation of the wheel frame 2, there is an angle corresponding to the area where the tray 41 stops rotating, while the range of the other angles corresponds to the area where the tray 41 rotates. The follower frame 51 swings within the area where the tray 41 rotates.

[0033] In this embodiment, the angle corresponding to the area where the tray 41 stops rotating is less than 180 degrees, preferably 90 to 120 degrees, and is set at the front of the wheel frame 2. The follower frame 51 is located at the rear of the wheel frame 2 and swings left and right.

[0034] In addition, in this embodiment, the mounting platform 1 is provided with a drive shaft 6, which protrudes upward from the top of the mounting platform 1. The wheel frame 2 is fixedly connected to the drive shaft 6, and the follower frame 51 is rotatably connected to the drive shaft 6 and located below the wheel frame 2. The first drive motor 3 is connected to the drive shaft 6 for transmission, and drives the wheel frame 2 to rotate through the drive shaft 6.

[0035] The image acquisition unit 53 is installed at the outer edge of the follower frame 51 and is located radially outside the wheel frame 2. Its height corresponds to the top surface of the tray 41 to acquire bottle cap images.

[0036] Also refer to Figure 3 and Figure 4As shown, the image acquisition unit 53 includes a line scan light source 531 and a line scan camera 532, used to continuously acquire images of the outer side of the bottle cap during its rotation to detect minor defects, such as scratches. The line scan light source 531 is used to illuminate the bottle cap to be inspected. The line scan light source 531 is provided with a vertical linear aperture. The line scan camera 532 is located behind the line scan light source 531 and is configured to acquire images of the side of the bottle cap to be inspected through the linear aperture.

[0037] The image acquisition unit 53 also includes a surface light source 533 and a surface scanning camera 534, used to continuously acquire images of the outer side of the bottle cap during its rotation to detect larger defects, such as bulges. The surface light source 533 and the surface scanning camera 534 are located on one side of the swing direction of the line scanning light source 531 and the line scanning camera 532, respectively. The surface scanning camera 534 is located above the surface light source 533. The surface light source 533 is configured to illuminate the bottle cap under inspection at an upward tilt, and the surface scanning camera 534 is configured to acquire images of the side of the bottle cap under inspection at a downward tilt.

[0038] The area scanning camera 534 and the line scanning camera 532 can be configured to simultaneously acquire images of the same bottle cap or images of different bottle caps. In this embodiment, the area scanning camera 534 and the line scanning camera 532 are configured to simultaneously acquire images of two adjacent bottle caps to be inspected, so as to be able to get closer to the bottle caps to acquire images.

[0039] Multiple cap-moving units are provided, and their number can be set according to the size of the wheel frame 2. The main point is that the spacing between adjacent trays 41 should be sufficient to ensure that the caps on the adjacent trays 41 do not interfere when the caps are moved in and out, and that there is enough space for the installation of the surface light source 533 and the surface scanning camera 534 and the line scanning camera 532.

[0040] Multiple image acquisition units 53 can be provided and distributed along the swing direction of the follower frame 51. It is preferable that the multiple image acquisition units 53 simultaneously acquire images of bottle caps on multiple adjacent trays 41 so that multiple bottle caps can be detected in one swing, thereby improving detection efficiency.

[0041] The image acquisition unit 53 has an arc-shaped rack 511 at the bottom of the follower frame 51. The center of the arc-shaped rack 511 is located on the rotation axis of the follower frame 51, and the teeth on it are set on the outer surface. The second drive motor 52 meshes with the arc-shaped rack 511 through gears to drive the follower frame 51 to swing.

[0042] The bottom of the follower frame 51 is also provided with a trigger plate 512, and the mounting platform 1 is provided with two limit photoelectric sensors 513. The two limit photoelectric sensors 513 are located on the swing path of the trigger plate 512, and the trigger plate 512 is located between the two limit photoelectric sensors 513.

[0043] The bottom of the follower frame 51 is also provided with a mechanical positioning block 514, and the installation platform 1 is provided with two mechanical positioning columns 515. The two mechanical positioning columns 515 are located on the swing path of the mechanical positioning block 514, and the mechanical positioning block 514 is located between the two mechanical positioning columns 515.

[0044] Please refer to the document. Figure 1 , 2 5. The cap-moving unit also includes a vertical sliding shaft 42, located directly above the tray 41, and vertically slidably connected to the wheel frame 2. The sliding shaft 42 is provided with a push rod 43. The mounting platform 1 is also provided with a lifting assembly 7. The lifting assembly 7 is located on the trajectory of the push rod 43 as it rotates with the wheel frame 2, and is configured to lift the sliding shaft 42 by pushing the push rod 43. The lower end of the sliding shaft 42 is rotatably connected to a pressure head 44, which can press on the top of the bottle cap without hindering the rotation of the bottle cap.

[0045] When the push rod 43 is not in contact with the lifting assembly 7, the sliding shaft 42 moves downward, causing the pressure head 44 to press against the top of the bottle cap, cooperating with the tray 41 to fix the bottle cap. Preferably, a spring 45 is provided between the push rod 43 and the wheel frame 2. The spring 45 exerts a downward force on the push rod 43, causing the sliding shaft 42 to exert downward pressure, pressing the bottle cap tightly onto the tray 41, ensuring the bottle cap is firmly clamped and preventing it from tipping over when it rotates.

[0046] When the push rod 43 rotates with the wheel frame 2 to contact the lifting assembly 7, it is lifted by the lifting assembly 7, which drives the sliding shaft 42 to move upward, releasing the clamp on the bottle cap and providing space for the bottle cap to move into the tray 41.

[0047] The lifting component 7 is positioned in the area where the tray 41 stops rotating.

[0048] The wheel frame 2 specifically includes a lower wheel 21 and an upper wheel 22 connected above the lower wheel 21. The lower wheel 21 is circular. The upper wheel 22 includes an annular vertical plate 221 and a horizontal plate 222 connecting the upper edge and / or lower edge of the annular vertical plate 221. The horizontal plate 222 is fixed to the lower wheel 21 by a support rod 223.

[0049] The tray 41 is rotatably connected to the lower wheel 21, and the sliding shaft 42 is slidably connected to the horizontal plate 222. The annular vertical plate 221 is provided with a limiting hole 2211 corresponding to the position of the sliding shaft 42, and the push rod is located in the limiting hole 2211.

[0050] In this embodiment, horizontal plates 222 are connected to the upper and lower edges of the annular vertical plate 221. The sliding shaft 42 is slidably connected to the two horizontal plates 222. The lower horizontal plate 222 is provided with a linear bearing 224 at the position corresponding to the sliding shaft 42. The linear bearing 224 extends downward from the horizontal plate 222. The sliding shaft 42 and the linear bearing 224 are slidably engaged. The linear bearing 224 can not only reduce the friction when the sliding shaft 42 slides, but also guide the sliding of the sliding shaft 42.

[0051] Spring 45 is fitted onto slide shaft 42, and both ends abut against push rod 43 and horizontal plate 222 located above, preferably always in a compressed state.

[0052] The limiting hole 2211 is a vertical strip-shaped hole. The sliding shaft 42 and the lifting assembly 7 are located on the inner and outer sides of the annular vertical plate 221, respectively. The end of the push rod 43 extends out of the limiting hole 2211. The lifting assembly 7 includes a horizontally extending protrusion 71, which is arc-shaped and its center is on the rotation axis of the wheel frame 2. The two ends of the protrusion 71 are inclined surfaces, and the top is a flat surface. The lowest position of the push rod corresponds to the area between the top and bottom of the protrusion 71. When the push rod 43 passes through the protrusion 71, it slides along the inclined surfaces at both ends and the top flat surface of the protrusion 71. The protrusion 71 is fixed to the mounting platform 1 by a column.

[0053] One end of the push rod 43 is provided with a follower wheel 46, which is used to slide in contact with the convex strip 71, so that the push rod 43 and the lifting assembly 7 are changed to rolling friction, thereby reducing the friction and wear during sliding.

[0054] The push rod 43 is also provided with a rolling bearing 47 in the middle. The rolling bearing 47 is located in the limiting hole 2211 and slides with the side wall of the limiting hole 2211, so that the push rod 43 and the limiting hole 2211 are changed to rolling friction, which reduces the friction and wear when the push rod 43 slides vertically.

[0055] The diameter of the rolling bearing 47 is preferably slightly smaller than the width of the limiting hole 2211, and a gap is provided between the rolling bearing 47 and the two sides of the limiting hole 2211 to prevent the rolling bearing 47 from contacting the two side walls of the limiting hole 2211 simultaneously when the push rod 43 slides up and down, thus affecting the normal rolling of the rolling bearing 47.

[0056] The pressure head 44 at the lower end of the slide shaft 42 includes a bearing seat 441, which is rotatably connected to the slide shaft 42. A pressure plate 442 is provided on the lower side of the bearing seat 441. A vent hole is provided in the middle of the pressure plate 442, which is connected to the bearing seat 441 to prevent the bottle cap from being lifted due to negative pressure when the slide shaft 42 moves upward.

[0057] The pressure plate 442 and tray 41 are preferably made of nylon to avoid rigid friction or squeezing with the bottle cap and damage to the bottle cap. Nylon material is also low in cost and can be replaced.

[0058] In addition, slots may be provided on the opposing surfaces of the pressure plate 442 and the tray 41 for positioning bottle caps.

[0059] A rotating shaft 48 is provided on the underside of the tray 41, and a bearing seat is provided on the lower wheel 21 corresponding to the position of the tray 41. The rotating shaft 48 is rotatably connected to the bearing seat 441.

[0060] In this embodiment, the lower end of the rotating shaft 48 extends downward to below the lower wheel 21, and a synchronous pulley 49 is provided at the lower end. The detection device of this application is also provided with a synchronous belt 81. After the synchronous pulley 49 rotates out of the area where the tray 41 stops rotating, it contacts and engages with the synchronous belt 81, and drives the synchronous pulley 49 to rotate through the synchronous belt 81, thereby driving the tray 41 and the bottle caps on the tray 41 to rotate.

[0061] In this embodiment, multiple trays 41 are distributed along the edge of the lower wheel 21. The mounting platform 1 is provided with several idler pulleys 82, located in the area where the trays 41 stop rotating and radially outward of the wheel frame 2. The timing belt 81 is fitted onto several timing pulleys 49 and idler pulleys 82, so that the timing belt 81 only abuts against the timing pulleys 49 located in the rotation area of ​​the trays 41.

[0062] The timing belt 81 can be fixed. After the timing pulley 49 comes into contact with the timing belt 81, the timing pulley 49 is driven to rotate by the wheel frame 2 to achieve relative rotation between the timing pulley 49 and the timing belt 81, thus completing the rotation.

[0063] In this embodiment, the mounting platform 1 is equipped with a drive motor 83 to drive the synchronous belt 81 to rotate. When the synchronous belt 81 and the wheel frame 2 rotate in the same direction, the bottle cap's rotation speed slows down. When the synchronous belt 81 and the wheel frame 2 rotate in opposite directions, the bottle cap's rotation speed speed increases. This allows the bottle cap's rotation speed to be adjusted according to actual needs.

[0064] The follow-up bottle cap peripheral defect detection device provided in this application can drive the bottle cap to revolve through the wheel frame 2, so that the bottle cap passes the position of the image acquisition unit 53. At the same time as the bottle cap revolves, the tray 41 drives the bottle cap to rotate, so that the image acquisition unit 53 can acquire a complete image of the side of the bottle cap and avoid image acquisition blind spots.

[0065] In addition, during image acquisition, the follower frame 51 drives the image acquisition unit 53 to rotate synchronously with the wheel frame 2, so that the bottle cap and the image acquisition unit 53 have the same speed in the same direction and their relative speed is zero. Therefore, even if the bottle cap conveying speed is increased during the detection process, the image acquisition unit 53 can still obtain a clear image, which improves the efficiency of bottle cap detection.

Claims

1. A servo bottle cap peripheral defect detection device characterized by, The system includes an installation platform (1), on which a wheel frame (2) and a first drive motor (3) are rotatably connected, driving the wheel frame (2) to rotate horizontally. The wheel frame (2) is provided with a cap-moving unit, which includes a tray (41). The tray (41) is rotatably connected to the wheel frame (2) and can rotate horizontally. The top surface of the tray (41) is used to support the bottle cap. The mounting platform (1) is also equipped with a follower frame (51) and a second drive motor (52) that drives the follower frame (51) to swing. The follower frame (51) swings coaxially with the wheel frame (2). The follower frame (51) is equipped with an image acquisition unit (53) and is configured to continuously acquire images of the outer side of the bottle cap to be inspected during the rotation of the bottle cap.

2. A follow-on bottle cap peripheral defect detection device according to claim 1, characterized in that, Multiple cover-moving units are provided on the wheel frame (2), and are evenly spaced around the rotating shaft (48) of the wheel frame (2).

3. A follow-on bottle cap peripheral defect detection device according to claim 2, wherein The image acquisition unit (53) is located radially outside the wheel frame (2) and its height corresponds to the top surface of the tray (41).

4. A follow-on bottle cap peripheral defect detection device according to claim 3, wherein The image acquisition unit (53) includes a line scan light source (531) and a line scan camera (532). The line scan light source (531) is used to illuminate the bottle cap to be inspected. The line scan light source (531) is provided with a vertical linear hole. The line scan camera (532) is located behind the line scan light source (531) and is configured to acquire the side image of the bottle cap to be inspected through the linear hole.

5. A follow-on bottle cap peripheral defect detection device according to claim 4, wherein The image acquisition unit (53) also includes a surface light source (533) and a surface scanning camera (534), which are located on one side of the swing direction of the line scanning light source (531) and the line scanning camera (532), respectively. The surface scanning camera (534) is located above the surface light source (533). The surface light source (533) is configured to illuminate the bottle cap to be inspected at an angle upward, and the surface scanning camera (534) is configured to acquire the side image of the bottle cap to be inspected at an angle downward.

6. The follow-up bottle cap peripheral defect detection device as described in claim 5, characterized in that, The area scanning camera (534) and the line scanning camera (532) are configured to simultaneously acquire images of two adjacent bottle caps to be inspected.

7. A follow-on bottle cap peripheral defect detection device according to claim 1, wherein The mounting platform (1) is equipped with a drive shaft (6), a wheel frame (2) is fixedly connected to the drive shaft (6), a follower frame (51) is rotatably connected to the drive shaft (6) and located below the wheel frame (2), and the first drive motor (3) is connected to the drive shaft (6) for transmission.

8. A follow-on bottle cap peripheral defect detection device according to claim 1, wherein The cover-moving unit also includes a vertical sliding shaft (42), located directly above the tray (41), and vertically slidably connected to the wheel frame (2). A push rod (43) is provided on the sliding shaft (42), and a lifting assembly (7) is also provided on the mounting platform (1). The lifting assembly (7) is located on the trajectory of the push rod (43) as it rotates with the wheel frame (2), and is configured to lift the sliding shaft (42) by pushing the push rod (43). A pressure head (44) is rotatably connected to the lower end of the sliding shaft (42).

9. A follow-on bottle cap peripheral defect detection device according to claim 8, wherein The wheel frame (2) includes a lower wheel (21) and an upper wheel (22) connected above the lower wheel (21). The upper wheel (22) includes an annular vertical plate (221) and a horizontal plate (222) connecting the upper edge and / or lower edge of the annular vertical plate (221). The tray (41) is rotatably connected to the lower wheel (21), and the sliding shaft (42) is slidably connected to the horizontal plate (222). The annular vertical plate (221) is provided with a limiting hole (2211) corresponding to the position of the sliding shaft (42), and the push rod is located in the limiting hole (2211).

10. A follow-on bottle cap peripheral defect detection device according to claim 9, wherein The sliding shaft (42) and the lifting assembly (7) are located on the inner and outer sides of the annular vertical plate (221), respectively. The lifting assembly (7) includes a horizontally extending convex strip (71). The two ends of the convex strip (71) are inclined surfaces, and the top is a flat surface. The lowest position of the push rod is between the top and bottom of the convex strip (71).

Images