Pop-top can pull ring defect detection equipment

Abstract

The invention relates to the technical field of product detection, in particular to zip-top can pull ring defect detection equipment which comprises a mounting base, a mounting plate is fixedly connected to the upper end of the mounting base, an opening is formed in the bottom of the mounting plate, a fixing mechanism is fixedly mounted at the upper end of the mounting plate, and a zip-top can is arranged above the opening. The fixing mechanism can fix and limit the zip-top can to prevent the zip-top can from shaking, then the fixing mechanism is used for fixing and limiting the zip-top can, a connecting barrel is arranged above the mounting plate, the fixing mechanism can drive the connecting barrel to move up and down, and a tension mechanism capable of testing tension on a pull ring of the zip-top can is fixedly mounted in the connecting barrel. A limiting mechanism is further fixedly installed in the connecting barrel, when the pulling force is too high, the pulling ring is released in time, the situation that the pulling ring is damaged due to the too large pulling force is effectively avoided, the integrity of the pulling ring in the detection process is guaranteed, the accuracy and reliability of pulling ring quality detection are improved, and the defective rate is reduced; and unnecessary resource waste is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of product detection, and particularly to a defective can pull tab detection device. Background Art

[0002] In the production and use of cans, the quality of the pull tab is crucial. An appropriate pull tab pulling force can not only ensure that consumers can easily open the can, but also prevent the pull tab from breaking prematurely due to too small a pulling force, or making it difficult to open due to too large a pulling force. Traditional pull tab detection mainly relies on manual sampling inspection, and judges whether the pull tab pulling force is appropriate through subjective feeling. This method is inefficient, cannot cover all products in large-scale production, and is greatly affected by human factors. It is difficult to unify the detection standards. At the same time, it is difficult to accurately quantify the pull tab pulling force value by manual detection, which cannot meet the high-precision requirements of modern production for quality control. With the development of automated production technology, the production speed of cans is continuously increasing, and the requirements for the automation and accuracy of defective pull tab detection equipment are also getting higher and higher. The market urgently needs a device that can automatically and accurately detect the pull tab pulling force and judge whether it meets the comfortable opening range of the human body, so as to improve product quality, reduce the defective rate, and improve production efficiency.

[0003] After a large amount of retrieval, it is found that the prior art publication number is CN116879317B, which discloses an on-line defective can detection device, including an upper suspension beam, a host computer, an industrial manipulator, a bottomless cylinder, an outer circumferential detection component and a bottom comparison detection component. The host computer is located below the upper suspension beam, the industrial manipulator is fixedly arranged below the upper suspension beam, the bottomless cylinder is fixedly arranged below the upper suspension beam, the outer circumferential detection component is arranged inside the bottomless cylinder, the bottom comparison detection component is arranged below the upper suspension beam, and the outer circumferential detection component includes a surrounding drive unit, a proportional concave-convex detection unit and a bulging re-inspection unit. The surrounding drive unit, the proportional concave-convex detection unit and the bulging re-inspection unit are all arranged inside the bottomless cylinder. This invention relates to the technical field of industrial product detection, and specifically provides an on-line defective can detection device that can simultaneously detect the defective appearance style of the top of the can, the integrity of the outer circumferential surface and the deformation degree of the bottom.

[0004] Therefore, based on the above retrieval and in combination with the existing ones, the above solution can only detect the appearance of the can, but cannot detect the pull tab pulling force, which means it is difficult to judge whether the pull tab conforms to the human force application habit during actual opening, which may lead to difficult opening for consumers or easy breakage of the pull tab, greatly limiting the comprehensiveness and practicality of the detection. For this reason, we propose a defective can pull tab detection device. Summary of the Invention

[0005] The object of the present invention is to provide a defective detection device for pull tabs of aluminum cans to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above object, the present invention provides the following technical solutions: A defective detection device for pull tabs of aluminum cans, including a mounting base, characterized in that: an upper end of the mounting base is fixedly connected with a mounting plate, an opening is formed at a bottom of the mounting plate, a fixing mechanism is fixedly installed at an upper end of the mounting plate, an aluminum can is arranged above the opening, and the fixing mechanism can fix and limit the aluminum can to prevent the aluminum can from shaking; Through the fixing mechanism for fixing and limiting, a connecting barrel is arranged above the mounting plate, the fixing mechanism can drive the connecting barrel to move up and down, a tensile force mechanism capable of testing the tensile force of the pull tab of the aluminum can is fixedly installed inside the connecting barrel to detect the pressure when the pull tab of the aluminum can is pulled, and a limiting mechanism is also fixedly installed inside the connecting barrel.

[0007] As a further improvement of this solution, the fixing mechanism includes a mating frame, a rotating arm is rotatably connected inside the mating frame, a left end of the rotating arm is fixedly connected with the connecting barrel, a contracting abutting arm is fixedly connected to a bottom of the rotating arm, and a rotating wheel is also rotatably connected to a bottom of the contracting abutting arm.

[0008] As a further improvement of this solution, a second fixing block is fixedly connected to an upper end of the mounting plate, a first fixing block is slidably connected between the mating frame and the second fixing block, an outer wall of the rotating wheel abuts against the first fixing block, and a plurality of first springs are fixedly connected between the first fixing block and the second fixing block.

[0009] As a further improvement of this solution, the tensile force mechanism includes a sliding circular plate, the sliding circular plate is slidably connected inside the connecting barrel, the sliding circular plate is fixedly connected to a bottom end of an inner wall of the connecting barrel through a second spring, a connecting pipe is fixedly connected to a bottom of the sliding circular plate, an outer wall of the connecting pipe slidably penetrates through the inside of the connecting barrel, and two arc-shaped clamping arms with a reset function are rotatably connected to a bottom of the connecting pipe.

[0010] As a further improvement of this solution, a second clamping arm and a first clamping arm are arranged below the connecting barrel, the second clamping arm and the first clamping arm are both rotatably connected to a bottom of an adjacent arc-shaped clamping arm, a second reset torsion spring is clamped between the second clamping arm and the first clamping arm and the adjacent arc-shaped clamping arm, an inner wall of the second clamping arm abuts against an outer wall of the first clamping arm, and a limiting gear is fixedly connected to a front end of both the second clamping arm and the first clamping arm.

[0011] As a further aspect of this solution, a first telescopic air pipe is fixedly connected to the bottom of the curved arc clamping arm, and a first clamping tooth is fixedly connected to the bottom of the first telescopic air pipe. The outer wall of the first clamping tooth is engaged with the limiting gear. A second telescopic air pipe is fixedly connected to the upper end of the sliding circular plate. The second telescopic air pipe and the first telescopic air pipe are fixedly connected and communicated through a matching pipe, and the outer wall of the matching pipe is fixedly penetrated through the connecting pipe and the inside of the curved arc clamping arm. A matching arm is fixedly connected to the upper end of the second telescopic air pipe, and a sliding opening is formed in the outer wall of the connecting barrel.

[0012] As a further aspect of this solution, a connecting block is fixedly connected to the inner wall of the connecting barrel, a tension meter is fixedly connected to the inner wall of the connecting barrel, a tension meter is fixedly connected to the upper end of the connecting barrel, and a pointer is rotatably connected to the left end of the tension meter.

[0013] As a further aspect of this solution, a recovery wheel is rotatably connected to the right end of the tension meter. The recovery wheel is fixedly connected to the pointer. The recovery wheel and the tension meter are clamped through a third torsion spring. A second pull rope is wound around the outer wall of the recovery wheel. The free end of the second pull rope is fixedly connected to the upper end of the sliding circular plate, and the outer wall of the second pull rope slides through the inside of the connecting barrel.

[0014] As a further aspect of this solution, the limiting mechanism includes a pulling block. A second clamping tooth is arranged on the left side of the pulling block. The second clamping tooth and the pulling block are fixedly connected through two sliding columns. The outer walls of the sliding columns are slidably connected to the upper end of the connecting barrel. Two fourth springs are fixedly connected between the pulling block and the connecting barrel.

[0015] As a further aspect of this solution, two rack teeth are fixedly connected to the upper end of the sliding circular plate. The outer walls of the two rack teeth penetrate through the inside of the connecting barrel, and the left ends of the rack teeth are abutted against the outer wall of the second clamping tooth. Beneficial effects

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. When the sliding circular plate is pulled by the pull ring and slowly approaches the bottom end of the inner wall of the connecting barrel, it will strongly pull the second pull rope. The moment the second pull rope is stressed, it will drive the recovery wheel to continuously rotate. During the rotation of the recovery wheel, it will also drive the pointer closely connected to it to rotate synchronously. When the sliding circular plate stops moving due to the change of the pull ring tension becoming stable, the pointer will also stop rotating steadily. At this time, the staff only needs to easily observe the position pointed by the pointer to directly and intuitively read the maximum tension value required for the pull ring to break away from the beverage can, so as to accurately and efficiently detect the tension of the beverage can pull ring and provide a key basis for controlling the production quality of the beverage can; 2. When the pulling force of the pull ring exceeds the predetermined value, the sliding circular plate approaches the bottom of the connecting barrel, driving a series of actions. The pulling force gauge triggers the matching arm, causing the second telescopic air pipe to extend and suck the first telescopic air pipe, resulting in the first locking tooth disengaging from the limiting gear. The second and first locking arms lose their limits and rotate, and the pull ring disengages from the clamping of the locking arms. This device can automatically sense abnormal pulling force of the pull ring. When the pulling force is too high, it releases the pull ring in time, effectively avoiding damage to the pull ring caused by excessive pulling force, ensuring the integrity of the pull ring during the detection process, improving the accuracy and reliability of the pull ring quality detection, reducing the defective rate, and reducing unnecessary resource waste. Description of the Drawings

[0017] Figure 1 is the front view of a pull ring defect detection device for a pop can; Figure 2 is the perspective view of a pull ring defect detection device for a pop can; Figure 3 is the schematic structural diagram of the position of the second fixing block of a pull ring defect detection device for a pop can; Figure 4 is the schematic internal structure diagram of the connecting barrel of a pull ring defect detection device for a pop can; Figure 5 is the schematic structural diagram of the position of the connecting block of a pull ring defect detection device for a pop can; Figure 6 is the schematic structural diagram of the position of the second locking arm of a pull ring defect detection device for a pop can; Figure 7 is the top view of the connecting barrel of a pull ring defect detection device for a pop can; Figure 8 is the schematic structural diagram of the limiting mechanism of a pull ring defect detection device for a pop can.

[0018] In the figure: 1. Installation base; 2. Installation plate; 3. Suction cup; 4. Matching frame; 5. Pop can; 6. Contracting abutting arm; 7. Rotating wheel; 8. Opening; 9. First fixing block; 10. Slide bar; 11. Rotating arm; 12. Connecting barrel; 13. First spring; 14. Second fixing block; 16. Bent arc locking arm; 17. Matching pipe; 18. Limiting gear; 19. First locking arm; 20. Second locking arm; 21. First telescopic air pipe; 22. Second spring; 23. Sliding circular plate; 24. Pointer; 25. Pulling force gauge; 26. Slide opening; 27. Matching arm; 28. Second telescopic air pipe; 29. Connecting pipe; 30. Rack; 31. Pulling block; 32. Sliding column; 33. Third torsion spring; 34. Recycling wheel; 35. Second pulling rope; 36. Fourth spring; 37. Second locking tooth; 38. First locking tooth; 39. Connecting block; 101. Fixing mechanism; 201. Pulling force mechanism; 301. Limiting mechanism. Detailed Implementation Manner

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] Embodiment 1: Please refer to Figure 1 、 Figure 3 As shown, a defective detection device for a pull tab of a pop can includes a mounting base 1. A mounting plate 2 is fixedly connected to the upper end of the mounting base 1. An opening 8 is formed at the bottom of the mounting plate 2. A fixing mechanism 101 is fixedly installed at the upper end of the mounting plate 2. Above the opening 8 is provided a pop can 5. The fixing mechanism 101 can fix and limit the pop can 5 to prevent the pop can 5 from shaking. When it is necessary to replace the pop can 5, only need to take out the pop can 5 from the opening 8, then pass a new pop can 5 through the opening 8, place it at a predetermined position, and then fix and limit it through the fixing mechanism 101. Above the mounting plate 2 is provided a connecting barrel 12. The fixing mechanism 101 can drive the connecting barrel 12 to move up and down. Inside the connecting barrel 12 is fixedly installed a tensile force mechanism 201 that can test the tensile force of the pull tab of the pop can 5 to detect the pressure when the pull tab of the pop can 5 is pulled. Inside the connecting barrel 12 is also fixedly installed a limiting mechanism 301. The bottom of the mounting base 1 is fixedly connected with a suction cup 3, and the suction cup 3 is made of rubber material. The rubber material has good elasticity, and also has good corrosion resistance and high temperature resistance. The suction cup 3 can enhance the friction between the mounting base 1 and the outer wall of the object.

[0021] Embodiment 2: Please refer to Figure 2 、 Figure 3 As shown, the fixing mechanism 101 includes a mating frame 4. Inside the mating frame 4, a rotating arm 11 is rotatably connected through a rotating shaft. The left end of the rotating arm 11 is fixedly connected to the connecting barrel 12 through a bolt. The bottom of the rotating arm 11 is fixedly connected with a retractable abutting arm 6. The bottom of the retractable abutting arm 6 is also rotatably connected with a rotating wheel 7 through a rotating shaft. A rubber sleeve is fixedly connected to the outer wall of the rotating wheel 7. A second fixing block 14 is fixedly connected to the upper end of the mounting plate 2. A first fixing block 9 is slidably connected between the mating frame 4 and the second fixing block 14, and the second fixing block 14 and the first fixing block 9 are symmetrically distributed left and right above the mounting plate 2. Both the second fixing block 14 and the first fixing block 9 are arc-shaped, and the inner walls of the arc shapes can better fit and abut against the outer wall of the pop can 5; Specifically, a plurality of sliding rods 10 are fixedly connected between the second fixed block 14 and the fitting frame 4. A plurality of sliding ports are formed inside the first fixed block 9. The inner wall of each sliding port is in sliding contact with the outer wall of the corresponding sliding rod 10. When the first fixed block 9 slides between the second fixed block 14 and the fitting frame 4, the sliding rod 10 can limit the first fixed block 9 through the sliding port and also has a guiding effect, improving the stability of the first fixed block 9 during movement. Lubricating oil is applied to the outer wall of the sliding port and the outer wall of the sliding rod 10. The lubricating oil can reduce the friction between the sliding rod 10 and the sliding port, greatly extending the service life of the sliding port and the sliding rod 10. The outer wall of the runner 7 abuts against the first fixed block 9, and the rubber sleeve can also enhance the friction between the runner 7 and the first fixed block 9. A plurality of first springs 13 are fixedly connected between the first fixed block 9 and the second fixed block 14. Each first spring 13 is sleeved on the outer wall of the corresponding sliding rod 10. The first spring 13 can drive the first fixed block 9 to quickly reset; Please refer to Figures 3 - 7 As shown, the tension mechanism 201 includes a sliding circular plate 23. The sliding circular plate 23 is slidably connected inside the connecting barrel 12. The sliding circular plate 23 is fixedly connected to the bottom end of the inner wall of the connecting barrel 12 through a second spring 22. The second spring 22 can drive the sliding circular plate 23 to quickly reset. A connecting pipe 29 is fixedly connected to the bottom of the sliding circular plate 23. The outer wall of the connecting pipe 29 slidably penetrates inside the connecting barrel 12. Two arc-shaped clamping arms 16 with a reset function are rotatably connected to the bottom of the connecting pipe 29 through a rotating shaft, and the arc-shaped clamping arms 16 are also in an "arc shape". A first reset torsion spring is clamped between each arc-shaped clamping arm 16 and the connecting pipe 29. The two arc-shaped clamping arms 16 are symmetrically distributed on the left and right at the bottom of the connecting pipe 29. A second clamping arm 20 and a first clamping arm 19 are arranged below the connecting barrel 12. The second clamping arm 20 and the first clamping arm 19 are both rotatably connected to the bottom of the adjacent arc-shaped clamping arm 16. A second reset torsion spring is clamped between the second clamping arm 20 and the first clamping arm 19 and the adjacent arc-shaped clamping arm 16. The inner wall of the second clamping arm 20 abuts against the outer wall of the first clamping arm 19. Limiting gears 18 are fixedly connected to the front ends of the second clamping arm 20 and the first clamping arm 19. A first telescopic air pipe 21 is also fixedly connected to the bottom of the arc-shaped clamping arm 16. The first telescopic air pipe 21 is located above the limiting gear 18, and a first tooth 38 is fixedly connected to the bottom of the first telescopic air pipe 21. The outer wall of the first tooth 38 is engaged with the limiting gear 18; The upper end of the sliding circular plate 23 is fixedly connected to a second telescopic air pipe 28. The second telescopic air pipe 28 and the first telescopic air pipe 21 are fixedly communicated through a fitting pipe 17. The outer wall of the fitting pipe 17 is fixedly inserted into the interiors of the connecting pipe 29 and the curved arc clamping arm 16. The upper end of the second telescopic air pipe 28 is fixedly connected to a fitting arm 27. A sliding port 26 is formed in the outer wall of the connecting barrel 12. A connecting block 39 is fixedly connected to the inner wall of the connecting barrel 12. The connecting block 39 is located directly below the sliding port 26. A tension gauge 25 is fixedly connected to the inner wall of the connecting barrel 12. A number of scale lines are arranged at the left end of the tension gauge 25. The number of scale lines are distributed in a circular shape at the left end of the tension gauge 25. The scale lines facilitate the staff to observe. The left end of the tension gauge 25 is rotatably connected to a pointer 24 through a rotating shaft. The right end of the tension gauge 25 is rotatably connected to a recovery wheel 34. When the sliding port 26 moves downward, the connecting block 39 will pass through the interior of the sliding port 26. The upper end of the connecting block 39 will abut against the bottom of the fitting arm 27. At this time, the second telescopic air pipe 28 will perform an extending action driven by the fitting arm 27. At this time, the second telescopic air pipe 28 will suck the first telescopic air pipe 21. At this time, the contraction of the first telescopic air pipe 21 will drive the first tooth 38 to disengage from the outer wall of the limiting gear 18. The recovery wheel 34 and the pointer 24 are fixedly connected. The recovery wheel 34 and the tension gauge 25 are clamped through a third torsion spring 33. A second pulling rope 35 is wound around the outer wall of the recovery wheel 34. The free end of the second pulling rope 35 is fixedly connected to the upper end of the sliding circular plate 23. The outer wall of the second pulling rope 35 is slidably inserted into the interior of the connecting barrel 12; Please refer to Figures 7 - 8 As shown, the limiting mechanism 301 includes a pulling block 31. The pulling block 31 is located above the connecting barrel 12. A second tooth 37 is arranged on the left side of the pulling block 31. The inclined surface of the second tooth 37 faces upward. The second tooth 37 and the pulling block 31 are fixedly connected through two sliding columns 32. The two sliding columns 32 are symmetrically distributed before and after between the second tooth 37 and the pulling block 31. The outer walls of the sliding columns 32 are slidably connected to the upper end of the connecting barrel 12. Two fourth springs 36 are fixedly connected between the pulling block 31 and the connecting barrel 12. Each of the fourth springs 36 is sleeved on the outer wall of the sliding column 32. Two racks 30 are fixedly connected to the upper end of the sliding circular plate 23. The outer walls of the two racks 30 are inserted into the interior of the connecting barrel 12. The left ends of the racks 30 abut against the outer wall of the second tooth 37; Specifically, when the sliding circular plate 23 moves downward, since the inclined surface of the second engaging tooth 37 faces upward, the sliding circular plate 23 will abut against the inclined surface of the second engaging tooth 37 when it descends, and the second engaging tooth 37 will move in the direction of the pulling block 31. When the sliding circular plate 23 stops moving and the connecting barrel 12 moves upward, with the connecting barrel 12 as a reference, the sliding circular plate 23 moves into the connecting barrel 12. The sliding circular plate 23 will drive the rack 30 to move inside the connecting barrel 12. At this time, the outer wall of the rack 30 will abut against the bottom of the second engaging tooth 37. Since the bottom of the second engaging tooth 37 is flat, it will engage with the outer wall of the rack 30 to limit the rack 30 and the sliding circular plate 23. When the pulling block 31 is pulled, the pulling block 31 will move the second engaging tooth 37 through the sliding column 32, and the second engaging tooth 37 will disengage from the outer wall of the rack 30, and the second spring 22 can reset the sliding circular plate 23 and the rack 30.

[0022] The working principle of the present invention is as follows: During use, rotate the two curved arc clamping arms 16 and clamp the two curved arc clamping arms 16 inside the pull ring. Just pull down the rotating arm 11, and the rotating arm 11 will rotate inside the fitting frame 4. The rotating arm 11 will drive the connecting barrel 12 to move. At this time, the connecting barrel 12 will drive the two curved arc clamping arms 16 to move. At this time, the two curved arc clamping arms 16 will drive the second clamping arm 20 and the first clamping arm 19 to pull the outer wall of the pull ring. At this time, due to the pressure, the sliding circular plate 23 and the connecting barrel 12 move relative to each other, and the bottom of the connecting barrel 12 and the sliding circular plate 23 approach each other, squeezing the second spring 22. When the connecting barrel 12 and the sliding circular plate 23 move relative to each other, when the connecting barrel 12 moves upward, with the connecting barrel 12 as a reference, the sliding circular plate 23 moves into the connecting barrel 12. The sliding circular plate 23 will drive the rack 30 to move into the connecting barrel 12. At this time, the outer wall of the rack 30 will abut against the bottom of the second engaging tooth 37. Since the bottom of the second engaging tooth 37 is flat, it will engage with the outer wall of the rack 30 to limit the rack 30 and the sliding circular plate 23. When the pull ring is disengaged from the connection with the beverage can 5, at this time, the second spring 22 will drive the sliding circular plate 23 to reset on the inner wall of the connecting barrel 12. Since the rack 30 is limited by the second engaging tooth 37, the sliding circular plate 23 cannot move; It should be noted that when the sliding circular plate 23 approaches the bottom end of the inner wall of the connecting barrel 12 in the opposite direction, the sliding circular plate 23 will also pull the second pull rope 35. The second pull rope 35 will rotate the recovery wheel 34. When the recovery wheel 34 rotates, it will drive the pointer 24 to rotate. When the sliding circular plate 23 stops, at this time, the pointer 24 will stop rotating. The staff can view the maximum force required for the pull ring to disengage from the connection with the beverage can 5 through the pointer 24; When the pulling force of the pull ring is higher than the predetermined value, the sliding circular plate 23 will approach the bottom end of the inner wall of the connecting barrel 12. When the connecting block 39 passes through the inside of the sliding port 26, the upper end of the connecting block 39 abuts against the bottom of the matching arm 27. At this time, the second telescopic air pipe 28 will perform an extending action driven by the matching arm 27. At this time, the second telescopic air pipe 28 will suck the first telescopic air pipe 21. At this time, the contraction of the first telescopic air pipe 21 will drive the first cogs 38 to disengage from the outer wall of the limiting gear 18. At this time, due to the action of the pulling force, the second clamping arm 20 and the first clamping arm 19 lose their limits, and the second clamping arm 20 and the first clamping arm 19 will rotate, and the outer wall of the pull ring will disengage from the outer walls of the second clamping arm 20 and the first clamping arm 19, avoiding damage to the pull ring, and it can be directly concluded that the pulling force required for the pull ring exceeds the predetermined value; After the test is completed, when the pull block 31 is pulled, the pull block 31 will move the second cogs 37 through the sliding column 32, and the second cogs 37 will disengage from the outer wall of the rack 30. The second spring 22 can then reset the sliding circular plate 23 and the rack 30 for the next test.

[0023] The above is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. An aluminum can pull ring defect detection device, comprising an installation base (1), characterized in that: The upper end of the installation base (1) is fixedly connected with an installation plate (2). An opening (8) is formed at the bottom of the installation plate (2). A fixing mechanism (101) is fixedly installed at the upper end of the installation plate (2). An aluminum can (5) is arranged above the opening (8). The fixing mechanism (101) can fix and limit the aluminum can (5) to prevent the aluminum can (5) from shaking. Then, it is fixed and limited by the fixing mechanism (101). A connecting barrel (12) is arranged above the installation plate (2). The fixing mechanism (101) can drive the connecting barrel (12) to move up and down. A tensile force mechanism (201) for testing the tensile force of the pull ring of the aluminum can (5) is fixedly installed inside the connecting barrel (12) to detect the pressure when the pull ring of the aluminum can (5) is pulled. A limiting mechanism (301) is also fixedly installed inside the connecting barrel (12).

2. The defect detection device for a pull tab of a pop-top can according to claim 1, characterized in that: The fixing mechanism (101) includes a fitting frame (4). A rotating arm (11) is rotatably connected inside the fitting frame (4). The left end of the rotating arm (11) is fixedly connected with the connecting barrel (12). A retractable abutting arm (6) is fixedly connected to the bottom of the rotating arm (11). A rotating wheel (7) is also rotatably connected to the bottom of the retractable abutting arm (6).

3. The defect detection device for a pull tab of a pop-top can according to claim 2, wherein: A second fixing block (14) is fixedly connected to the upper end of the installation plate (2). A first fixing block (9) is slidably connected between the fitting frame (4) and the second fixing block (14). The outer wall of the rotating wheel (7) abuts against the first fixing block (9). A plurality of first springs (13) are fixedly connected between the first fixing block (9) and the second fixing block (14).

4. A defective can tab detection device according to claim 1, characterized in that: The tensile force mechanism (201) includes a sliding circular plate (23). The sliding circular plate (23) is slidably connected inside the connecting barrel (12). The sliding circular plate (23) is fixedly connected to the bottom end of the inner wall of the connecting barrel (12) through a second spring (22). A connecting pipe (29) is fixedly connected to the bottom of the sliding circular plate (23). The outer wall of the connecting pipe (29) slidably penetrates through the inside of the connecting barrel (12). Two arc-shaped clamping arms (16) with a reset function are rotatably connected to the bottom of the connecting pipe (29).

5. The defect detection device for a pop-top can pull ring according to claim 4, wherein: A second clamping arm (20) and a first clamping arm (19) are arranged below the connecting barrel (12). The second clamping arm (20) and the first clamping arm (19) are both rotatably connected to the bottom of the adjacent arc-shaped clamping arm (16). A second return torsion spring is clamped between the second clamping arm (20) and the first clamping arm (19) and the adjacent arc-shaped clamping arm (16). The inner wall of the second clamping arm (20) abuts against the outer wall of the first clamping arm (19). Limiting gears (18) are fixedly connected to the front ends of the second clamping arm (20) and the first clamping arm (19).

6. The defect detection device for a pull tab of a pop-top can according to claim 5, wherein: The bottom of the bent arc clamping arm (16) is also fixedly connected with a first telescopic air pipe (21), and the bottom of the first telescopic air pipe (21) is fixedly connected with a first clamping tooth (38). The outer wall of the first clamping tooth (38) is engaged with the limiting gear (18). The upper end of the sliding circular plate (23) is fixedly connected with a second telescopic air pipe (28). The second telescopic air pipe (28) and the first telescopic air pipe (21) are fixedly communicated through a matching pipe (17). The outer wall of the matching pipe (17) is fixedly penetrated through the connecting pipe (29) and the inside of the bent arc clamping arm (16). The upper end of the second telescopic air pipe (28) is fixedly connected with a matching arm (27), and a sliding port (26) is formed in the outer wall of the connecting barrel (12).

7. An aluminum can pull tab defect detection device according to claim 6, characterized in that: A connecting block (39) is fixedly connected to the inner wall of the connecting barrel (12). A pull force meter (25) is fixedly connected to the inner wall of the connecting barrel (12). A pull force meter (25) is fixedly connected to the upper end of the connecting barrel (12). The left end of the pull force meter (25) is rotatably connected with a pointer (24).

8. An aluminum can pull ring defect detection device according to claim 7, characterized in that: The right end of the pull force meter (25) is rotatably connected with a recovery wheel (34). The recovery wheel (34) is fixedly connected with the pointer (24). The recovery wheel (34) and the pull force meter (25) are clamped through a third torsion spring (33). A second pull rope (35) is wound around the outer wall of the recovery wheel (34). The free end of the second pull rope (35) is fixedly connected to the upper end of the sliding circular plate (23). The outer wall of the second pull rope (35) slides through the inside of the connecting barrel (12).

9. The defect detection device for a pull tab of a pop-top can according to claim 1, wherein: The limiting mechanism (301) includes a pull block (31). A second clamping tooth (37) is arranged on the left side of the pull block (31). The second clamping tooth (37) and the pull block (31) are fixedly connected through two sliding columns (32). The outer walls of the sliding columns (32) are slidably connected to the upper end of the connecting barrel (12). Two fourth springs (36) are fixedly connected between the pull block (31) and the connecting barrel (12).

10. An aluminum can pull ring defect detection device according to claim 4, characterized in that: Two rack bars (30) are fixedly connected to the upper end of the sliding circular plate (23). The outer walls of the two rack bars (30) penetrate through the inside of the connecting barrel (12). The left ends of the rack bars (30) are abutted against the outer wall of the second clamping tooth (37).

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