An online detection device for can pull rings on an assembly line

Abstract

The present invention discloses an online detection device for pull rings of cans on an assembly line, comprising a rack-type detection platform and a detection frame, wherein the detection frame is fixedly mounted on the front bottom of the rack-type detection platform, a conveyor line is arranged on the rear side of the rack-type detection platform, a rejector is arranged on the front side of the conveyor line, a control cabinet is arranged on the right side of the rack-type detection platform, a lifting device is arranged inside the detection frame, a driving device is fixedly mounted on the surface of the lifting device, a visual inspection instrument is fixedly mounted on the bottom of the driving device, a fixing frame is fixedly mounted on the bottom of the inner wall of the detection frame, a hollow plate is fixedly mounted on the bottom of the visual inspection instrument, a connecting plate 1 is slidably mounted on the inner wall of the hollow plate, the driving device slowly descends to drive the visual inspection instrument to slowly descend, and the visual inspection instrument slowly descends to scan the bottle caps of the cans; the present invention has the characteristic of preventing the visual inspection instrument from shaking significantly.

Description

Technical Field

[0001] The invention relates to the technical field of fluid tightness testing, in particular to an online detection device for pull rings of cans on an assembly line. Background Art

[0002] The online inspection device for can pull rings on an assembly line usually consists of a rack-type inspection platform, a conveyor line, and a visual inspection instrument. The visual inspection instrument uses a gigabit digital camera to take pictures from top to bottom, collect images of can caps, perform digital analysis on the captured images and perform 360° matching with templates, and automatically remove cans with unqualified cap angles online.

[0003] Patent publication number CN217520694U relates to a high-speed capping device for detecting and capping leaks on cans, and relates to the field of can-open-lid processing machinery. The device comprises a fixing unit and a light detection assembly. The light detection assembly is mounted on the fixing unit and comprises at least one detection unit, a detection body mounted on an upper plate, and a light source mounted on a lower plate. The detection body and the light source correspond to each other. The detection body is fixed to the upper plate via a spring pressure plate. The spring pressure plate has a central hole in its center for the light source to pass through. A space is formed between the hollow bottom of the spring pressure plate and the lower plate to accommodate a light-transmitting capping mold. A compression spring is installed between the light-transmitting capping mold and the spring pressure plate. Under the external force of the compression spring, the lower edge of the light-transmitting capping mold protrudes from the bottom surface of the lower plate. The device enables rapid capping of cans moving in a stepwise manner on a production line, and rapidly detects leaking cans through optical detection equipment.

[0004] In the above patent, optical inspection equipment is used to quickly detect leaking can lids. However, it is difficult to ensure that the visual inspection instrument does not shake significantly when moving. Shaking of the visual inspection instrument will cause the relative position of the visual inspection instrument lens and the can to be unstable, resulting in blurred or offset images of the captured pull rings. The deformation characteristics of the pull rings cannot be accurately captured, and qualified products may be misjudged as defective products, or actual defects may be missed. Therefore, it is very necessary to design an online detection device for can pull rings on an assembly line that is highly practical and can prevent shaking of the visual inspection instrument. Summary of the Invention

[0005] The object of the present invention is to provide an online detection device for can pull rings on an assembly line to solve the problems raised in the above background technology.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: an online detection device for can pull rings on an assembly line, comprising a rack-type detection platform and a detection frame, wherein the detection frame is fixedly installed at the front bottom of the rack-type detection platform, a conveyor line is provided at the rear side of the rack-type detection platform, a rejector is provided at the front side of the conveyor line, a control cabinet is provided on the right side of the rack-type detection platform, a lifting device is provided inside the detection frame, a driving device is fixedly installed on the surface of the lifting device, a visual detector is fixedly installed at the bottom of the driving device, a fixing frame is fixedly installed at the bottom of the inner wall of the detection frame, and the visual A hollow plate is fixedly installed at the bottom of the visual detector, and a connecting plate 1 is slidably installed on the inner wall of the hollow plate, and a connecting plate 2 is slidably installed on the inner wall of the hollow plate. An elastic telescopic rod is provided on the surface of the lifting device, and an energy-absorbing plate is fixedly installed on the inner wall of the elastic telescopic rod. A delay frame slides through the upper and lower walls of the energy-absorbing plate, and an energy-absorbing hole is provided on the top of the energy-absorbing plate, and a delay hole is provided on the top of the delay frame. The visual detector is used to perform fluid tightness testing on the pull ring of the can using light, and the driving device slowly descends to drive the visual detector to slowly descend, and the visual detector slowly descends to scan the bottle cap of the can.

[0007] According to the above technical solution, a U-shaped rod is fixedly installed on the top of the visual inspection instrument, and a spring 1 is provided between the energy absorption plate and the delay frame. The delay frame can be supported by the spring 1, and the free end of the elastic telescopic rod is fixedly connected to the lifting equipment.

[0008] According to the above technical solution, a sealing ring 1 is provided between the free end of the elastic telescopic rod and the fixed end of the elastic telescopic rod, and the sealing ring 1 can improve the sealing effect between the free end of the elastic telescopic rod and the fixed end of the elastic telescopic rod. Liquid is provided inside the hollow plate, and a sealing ring 2 is provided between the hollow plate and the connecting plate 1. The sealing effect between the hollow plate and the connecting plate 1 can be improved by the sealing ring 2. An exhaust hole is provided at the bottom of the circumferential surface of the elastic telescopic rod, and a mesh screen plate is fixedly installed inside the exhaust hole, which can prevent foreign matter from entering the interior of the elastic telescopic rod.

[0009] According to the above technical solution, a sealing ring three is provided between the hollow plate and the connecting plate two, and the sealing ring three can improve the sealing effect between the hollow plate and the connecting plate two. The connecting plate one is in contact with the fixing frame, and a spring two is provided between the hollow plate and the connecting plate one, and the connecting plate one can be supported by the spring two. A spring three is provided between the hollow plate and the connecting plate two, and the connecting plate two can be supported by the spring three. The connecting plate two moves toward the direction close to the hollow plate to break away from the contact with the visual detector and release the obstruction of the visual detector lens.

[0010] According to the above technical solution, a barrier component for preventing liquid from splashing inside the can is provided inside the lifting device, and a fill light component is provided on the surface of the detection frame. The barrier component includes a leak-stop hole, a leak-stop plate, a rubber plate, a support rod and a hanging rod. The leak-stop plate moves downward to drive the rubber plate to move downward, and the rubber plate moves downward to block the holes at the bottom of the detection frame. The leak-stop hole is opened at the bottom end of the lifting device, and the leak-stop plate is slidably installed on the inner wall of the leak-stop hole. The rubber plate is fixedly installed on the bottom of the leak-stop plate, the support rod is fixedly installed on the bottom of the inner wall of the detection frame, and the hanging rod is fixedly installed on the bottom of the rubber plate.

[0011] According to the above technical solution, the leak-stop plate is slidably connected to the support rod, and a leak-stop spring is arranged between the leak-stop hole and the leak-stop plate. The leak-stop plate moves downward to squeeze the leak-stop spring, and the leak-stop spring is squeezed by the leak-stop plate to produce deformation and accumulate force. After the leak-stop plate is separated from the contact with the U-shaped rod, the leak-stop plate can be driven to reset by the leak-stop spring, and the rubber plate is in contact with the lifting equipment. The leak-stop plate moves downward and continues to contact the support rod and is supported by the support rod.

[0012] According to the above technical solution, the fill light assembly includes a stop plate, a screw rod and a baffle, the stop plate is slidably installed on the bottom of the detection frame, the screw rod is rotatably installed on the side of the detection frame close to the U-shaped rod, the baffle is slidably installed on the side of the detection frame close to the screw rod, and the baffle is threadedly connected to the screw rod, and the rotation of the screw rod can be limited by the stop plate.

[0013] According to the above technical solution, the fill light assembly also includes a baffle frame, a baffle rod, a baffle plate and a lighting device. The baffle frame is fixedly installed on the bottom of the baffle plate, the baffle rod is fixedly installed on the side of the screw rod close to the stop plate, the baffle plate is fixedly installed on the circumferential surface of the baffle rod, and the lighting device is arranged on the inner wall of the baffle frame. Starting the screw rod to rotate can drive the baffle and the baffle frame to move, and the movement of the baffle frame drives the lighting device to move to adjust the fill light position of the lighting device.

[0014] According to the above technical solution, a spring four is arranged between the stop plate and the detection frame. The stop plate moves toward the direction close to the baffle to squeeze the spring four. The spring four is squeezed by the stop plate to produce deformation and accumulate force. After the stop plate is out of contact with the suspension rod, the stop plate can be driven to reset by the spring four. A limiting groove is provided on the circumferential surface of the baffle, and the side of the stop plate close to the suspension rod is set as an inclined surface, and the side of the stop plate close to the baffle is set as an arc surface. The baffle rod cannot rotate, which makes the screw rod unable to rotate, and the screw rod cannot rotate, which makes the baffle and the baffle frame unable to move horizontally.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] (1) The on-line detection device for can pull rings of the production line moves the connecting plate toward the hollow plate to break away from the contact with the visual inspection instrument and release the obstruction of the visual inspection instrument lens. By blocking the lens, the ambient stray light can be prevented from directly hitting the lens, and the sensitivity of the visual inspection instrument can be prevented from being attenuated due to long-term strong light exposure in the non-inspection state. It ensures that the visual inspection instrument can quickly restore its high-precision testing capability after restarting. The visual inspection instrument slowly descends to scan the can bottle cap. The visual inspection instrument slowly descends to prevent the lens from shaking, and can accurately capture the deformation characteristics of the pull ring, thereby avoiding false detection caused by lens shaking.

[0017] (2) The online detection device for can pull rings on the production line drives the rubber plate to move downward by moving the leak-proof plate downward. The rubber plate moves downward to block the holes at the bottom of the detection frame. In view of the high-pressure environment inside the gas-containing can, the elastic buffering and sealing performance of the rubber plate can resist the impact of liquid splashing, prevent the visual inspection instrument from short-circuiting, and extend the service life of the visual inspection instrument.

[0018] (3) The on-line detection device for the pull ring of the cans on the production line ensures that the force on the leak-proof plate is evenly dispersed by moving the leak-proof plate downward and continuously contacting and being supported by the support rod, thereby avoiding deformation caused by excessive local pressure and maintaining a stable sealing and blocking effect.

[0019] (4) The online detection device for can pull rings on the assembly line can drive the baffle and the baffle frame to move by starting the screw rod. The movement of the baffle frame drives the movement of the lighting equipment to adjust the fill light position of the lighting equipment. The lighting angle can be flexibly adjusted for cans of different sizes and shapes, which can eliminate shadow and reflection interference and avoid missed detection due to uneven lighting, thereby ensuring the reliability of the detection results.

[0020] (5) The on-line inspection device for can pull rings on the assembly line prevents the horizontal movement of the retaining frame, which makes it impossible for the lighting equipment to be adjusted when the visual inspection instrument is working. By limiting the movement of the retaining frame, the position offset of the fill light caused by the accidental movement of the lighting equipment can be avoided, and the reflection change in the inspection image can be further prevented, thereby maintaining the consistency of the can pull ring defect identification. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the structure of the visual inspection instrument and the hollow plate of the present invention;

[0024] Figure 3 2 is a schematic diagram of a half-section structure of a detection frame of the present invention;

[0025] Figure 4 This is a schematic diagram of the position structure of the lifting device and the elastic telescopic rod of the present invention;

[0026] Figure 5 This invention Figure 4 A schematic diagram of the structure of part A in the middle;

[0027] Figure 6 This is a schematic diagram of a half-section structure of a fixing frame of the present invention;

[0028] Figure 7 This is a schematic diagram of a half-section structure of the elastic telescopic rod of the present invention;

[0029] Figure 8 2 is a schematic diagram of a half-section structure of the energy absorbing plate of the present invention;

[0030] Figure 9 It is a schematic diagram of the internal structure of the lifting device of the present invention.

[0031] In the figure: 1. rack-type detection platform; 2. detection frame; 3. lifting device; 4. driving device; 5. visual inspection instrument; 6. fixed frame; 7. hollow plate; 8. connecting plate 1; 9. connecting plate 2; 10. elastic telescopic rod; 11. energy absorption plate; 12. delay frame; 13. energy absorption hole; 14. delay hole; 15. U-shaped rod; 161. leak-stopping hole; 162. leak-stopping plate; 163. leak-stopping spring; 164. rubber plate; 165. support rod; 166. hanging rod; 171. stop plate; 172. screw rod; 173. baffle; 174. baffle frame; 175. baffle rod; 176. baffle plate. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] Example 1:

[0034] See also Figure 1-8The present invention provides a technical solution: an online detection device for can pull rings on an assembly line, comprising a rack-type detection platform 1 and a detection frame 2. The detection frame 2 is fixedly mounted on the front bottom of the rack-type detection platform 1. A conveyor line is provided on the rear side of the rack-type detection platform 1, and a rejector is provided on the front side of the conveyor line. A control cabinet is provided on the right side of the rack-type detection platform 1. A lifting device 3 is provided inside the detection frame 2. A driving device 4 is fixedly mounted on the surface of the lifting device 3. A visual inspection instrument 5 is fixedly mounted on the bottom of the driving device 4. A fixing frame 6 is fixedly mounted on the bottom of the inner wall of the detection frame 2. A hollow plate 7 is fixedly mounted on the bottom of the visual inspection instrument 5. A connecting plate 8 is slidably installed on the inner wall of the hollow plate 7, and a connecting plate 2 9 is slidably installed on the inner wall of the hollow plate 7. An elastic telescopic rod 10 is provided on the surface of the lifting device 3, and an energy absorbing plate 11 is fixedly installed on the inner wall of the elastic telescopic rod 10. A delay frame 12 slides through the upper and lower walls of the energy absorbing plate 11. An energy absorbing hole 13 is provided on the top of the energy absorbing plate 11, and a delay hole 14 is provided on the top of the delay frame 12. The visual inspection instrument 5 is used to apply light to test the fluid tightness of the pull ring of the can. By slowly descending the visual inspection instrument 5 to prevent the lens from shaking, the deformation characteristics of the pull ring can be accurately captured, thereby avoiding false detection caused by lens shaking.

[0035] A U-shaped rod 15 is fixedly installed on the top of the visual inspection instrument 5, and a spring 1 is provided between the energy absorbing plate 11 and the delay frame 12. The delay frame 12 can be supported by the spring 1. The free end of the elastic telescopic rod 10 is fixedly connected to the lifting device 3. The visual inspection instrument 5 adopts a curved surface scanning technology. The curved surface scanning technology imitates the human eye and uses two (or more) cameras to shoot objects from different perspectives at the same time. By matching the corresponding points in the two images and calculating the three-dimensional coordinates using parallax, the visual inspection instrument 5 continuously scans the upper surface of the can bottle cap. If the sealing is not good and the internal pressure of the bottle is abnormal, it will cause a sudden change in the can cap, thereby judging whether the seal of the cap is qualified.

[0036] A sealing ring 1 is provided between the free end of the elastic telescopic rod 10 and the fixed end of the elastic telescopic rod 10, and the sealing ring 1 can improve the sealing effect between the free end of the elastic telescopic rod 10 and the fixed end of the elastic telescopic rod 10. Liquid is provided inside the hollow plate 7, and a sealing ring 2 is provided between the hollow plate 7 and the connecting plate 1 8. The sealing effect between the hollow plate 7 and the connecting plate 1 8 can be improved by the sealing ring 2. An exhaust hole is provided at the bottom of the circumferential surface of the elastic telescopic rod 10, and a mesh screen is fixedly installed inside the exhaust hole. The mesh screen can prevent foreign matter from entering the interior of the elastic telescopic rod 10. The conveyor line is used to convey the cans, and the rejector is used to reject unqualified cans. Rejection: The control cabinet is used to control the movement of the conveyor line. A positioning sensor is provided inside the visual inspection instrument 5. When the can passes through the positioning sensor, the arrival of the can is detected. The can identification number and the current encoder signal are recorded by the control unit. The positioning sensor triggers the visual inspection instrument 5 to collect the current can cap image and transmit the image to the image processor through the network. The image processor processes and analyzes the received image and transmits the processing result to the human-machine interface for dynamic display on the one hand and to the control unit on the other hand. After receiving the unqualified bottle cap signal, the control unit notifies the rejector to reject the cans with unqualified bottle caps with the corresponding identification number online.

[0037] A sealing ring three is provided between the hollow plate 7 and the connecting plate 2 9, and the sealing ring three can improve the sealing effect between the hollow plate 7 and the connecting plate 2 9. The connecting plate 1 8 is in contact with the fixing frame 6. A spring two is provided between the hollow plate 7 and the connecting plate 1 8, and the connecting plate 1 8 can be supported by the spring two. A spring three is provided between the hollow plate 7 and the connecting plate 2 9, and one end of the spring three is fixed to the inner wall of the hollow plate 7, and the other end of the spring three is fixed to the left side of the connecting plate 2 9. The connecting plate 2 9 can be supported by the spring three. The connecting plate 2 9 moves toward the direction of the hollow plate 7 to break away from the contact with the visual detector 5 and release the obstruction of the lens of the visual detector 5. By blocking the lens, the ambient stray light can be avoided from directly hitting the lens, and the sensitivity attenuation caused by the long-term exposure of the visual detector 5 to strong light in the non-detection state can be prevented, ensuring that the visual detector 5 can quickly restore the high-precision testing capability after restarting.

[0038] During operation, the lifting device 3 is started to drive the driving device 4 to move downward, and the driving device 4 moves downward to drive the visual inspection instrument 5 to move downward, and the visual inspection instrument 5 moves downward to drive the hollow plate 7 to move downward, and the hollow plate 7 moves downward to drive the connecting plate 8 to move downward, and the connecting plate 8 moves downward to break away from the contact with the fixing frame 6. After the connecting plate 8 breaks away from the contact with the fixing frame 6, the connecting plate 8 moves upward and resets under the elastic force of the spring. The connecting plate 8 moves upward and resets under the action of negative pressure, and the liquid inside the hollow plate 7 will flow upward. The upward flow of the liquid inside the hollow plate 7 will suck the connecting plate 2 9 to move toward the bottom direction of the connecting plate 8 under the condition of negative pressure. At the same time, the elastic force of the liquid flow spring 3 inside the hollow plate 7 will also pull the connecting plate 2 9 to move toward the bottom direction of the connecting plate 8, and the connecting plate 29 moves in the direction close to the connecting plate 1 8 to break away from the contact with the visual inspection instrument 5 and release the obstruction to the lens of the visual inspection instrument 5. At the same time, the lifting device 3 moves downward, driving the free end of the elastic telescopic rod 10 to move downward. The downward movement of the free end of the elastic telescopic rod 10 squeezes the gas inside the elastic telescopic rod 10. The gas inside the elastic telescopic rod 10 is squeezed by the free end of the elastic telescopic rod 10 and can only slowly flow out of the elastic telescopic rod 10 through the delay hole 14 and the mesh screen. The gas inside the elastic telescopic rod 10 slowly flows out of the elastic telescopic rod 10, causing the free end of the elastic telescopic rod 10 to move slowly downward. The free end of the elastic telescopic rod 10 moves slowly downward, driving the lifting device 3 and the driving device 4 to slowly descend. The driving device 4 slowly descends, driving the visual inspection instrument 5 to slowly descend. The visual inspection instrument 5 slowly descends to scan the can cap. The visual inspection instrument 5 adopts curved surface scanning technology to continuously scan the upper surface of the can cap. If the sealing is not good and the internal pressure of the bottle is abnormal, it will cause a sudden change in the can cap, thereby judging whether the seal of the cap is qualified.

[0039] Example 2:

[0040] See also Figure 1-9 On the basis of Example 1, in this embodiment, a barrier component for preventing liquid from splashing inside the can is provided inside the lifting device 3, and a fill light component is provided on the surface of the detection frame 2. The barrier component includes a leak-stop hole 161, a leak-stop plate 162, a rubber plate 164, a support rod 165 and a hanging rod 166. The leak-stop hole 161 is opened at the bottom end of the lifting device 3, the leak-stop plate 162 is slidably installed on the inner wall of the leak-stop hole 161, the rubber plate 164 is fixedly installed at the bottom of the leak-stop plate 162, the support rod 165 is fixedly installed at the bottom of the inner wall of the detection frame 2, and the hanging rod 166 is fixedly installed at the bottom of the rubber plate 164. In view of the high-pressure environment inside the gas-containing can, the elastic buffering and sealing performance of the rubber plate 164 can resist the impact of liquid splashing, prevent the circuit of the visual detector 5 from short circuit, and extend the service life of the visual detector 5.

[0041] The leak-stop plate 162 is slidably connected to the support rod 165, and a leak-stop spring 163 is provided between the leak-stop hole 161 and the leak-stop plate 162. The leak-stop plate 162 moves downward to squeeze the leak-stop spring 163. The leak-stop spring 163 is squeezed by the leak-stop plate 162 to produce deformation and accumulate force. After the leak-stop plate 162 is separated from the contact with the U-shaped rod 15, the leak-stop spring 163 can drive the leak-stop plate 162 to reset, and the rubber plate 164 contacts the lifting device 3. The leak-stop plate 162 moves downward and continues to contact the support rod 165 and is supported by the support rod 165. The leak-stop plate 162 moves downward and continues to contact the support rod 165 and is subjected to force, which can ensure that the force on the leak-stop plate 162 is evenly dispersed, avoids deformation due to excessive local pressure, and thus maintains a stable sealing and blocking effect.

[0042] The fill light assembly includes a stop plate 171, a screw rod 172 and a baffle 173. The stop plate 171 is slidably installed at the bottom of the detection frame 2, the screw rod 172 is rotatably installed on the side of the detection frame 2 close to the U-shaped rod 15, and the baffle 173 is slidably installed on the side of the detection frame 2 close to the screw rod 172. The baffle 173 is threadedly connected to the screw rod 172, and the rotation of the screw rod 172 can be limited by the stop plate 171.

[0043] The fill light assembly also includes a baffle 174, a baffle rod 175, a baffle plate 176 and lighting equipment. The baffle frame 174 is fixedly installed at the bottom of the baffle 173, the baffle rod 175 is fixedly installed on the side of the screw rod 172 close to the stop plate 171, and the baffle plate 176 is fixedly installed on the circumferential surface of the baffle rod 175. The lighting equipment is arranged on the inner wall of the baffle frame 174. The lighting angle can be flexibly adjusted for cans of different sizes and shapes to eliminate shadow and reflection interference, avoid missed detection due to uneven lighting, and thus ensure the reliability of the test results.

[0044] A spring four is provided between the stop plate 171 and the detection frame 2. The stop plate 171 moves toward the direction close to the baffle 176 to squeeze the spring four. The spring four is squeezed by the stop plate 171 to produce deformation and accumulate force. After the stop plate 171 is out of contact with the suspension rod 166, the stop plate 171 can be driven to reset by the spring four. A limiting groove is provided on the circumferential surface of the baffle 176. The side of the stop plate 171 close to the suspension rod 166 is set as an inclined surface, and the side of the stop plate 171 close to the baffle 176 is set as an arc surface. The baffle rod 175 cannot rotate, so the screw rod 172 cannot rotate. The screw rod 172 cannot rotate, so the baffle 173 and the baffle frame 174 cannot move horizontally. By limiting the movement of the baffle frame 174, the fill light position offset caused by accidental movement of the lighting equipment can be avoided, and the detection image can be further prevented from showing reflective changes, thereby maintaining the consistency of the defect recognition of the can pull ring.

[0045] During operation, the visual inspection instrument 5 moves downward, driving the U-shaped rod 15 to move downward. The U-shaped rod 15 moves downward and contacts the leak-stop plate 162 and squeezes the leak-stop plate 162. The leak-stop plate 162 moves downward under the squeezing of the U-shaped rod 15. The leak-stop plate 162 moves downward, driving the rubber plate 164 to move downward. The rubber plate 164 moves downward to block the holes at the bottom of the inspection frame 2, thereby preventing the abnormal pressure can from being damaged and causing the liquid inside the can to splash into the interior of the inspection frame 2. At the same time, the leak-stop plate 162 moves downward and continues to contact with the The support rod 165 contacts and is supported by the support rod 165, thereby preventing the leak-stop plate 162 from being deformed due to uneven force and affecting the effect of the barrier detection frame 2. When the visual inspection instrument 5 moves upward and resets, it drives the U-shaped rod 15 to move upward. The U-shaped rod 15 moves upward and breaks away from the contact with the leak-stop plate 162. After the leak-stop plate 162 breaks away from the contact with the U-shaped rod 15, the leak-stop plate 162 moves upward under the elastic force of the leak-stop spring 163. The leak-stop plate 162 moves upward and resets, driving the rubber plate 164 to move upward to restore to its initial position.

[0046] The rubber plate 164 moves downward, driving the hanging rod 166 to move downward. The hanging rod 166 moves downward and contacts the inclined surface of the stop plate 171 and squeezes the stop plate 171. The stop plate 171 is squeezed by the hanging rod 166 and moves toward the direction close to the baffle 176. The stop plate 171 moves toward the direction close to the baffle 176 and contacts the limiting groove of the baffle 176 and limits the baffle 176. The baffle 176 cannot rotate due to the stop plate 171. The baffle 176 cannot rotate, which makes the baffle rod 175 unable to rotate. The inability of the baffle 175 to rotate makes the screw rod 172 unable to rotate, and the inability of the screw rod 172 to rotate makes the baffle 173 and the baffle frame 174 unable to move horizontally, and the inability of the baffle frame 174 to move horizontally makes it impossible for the lighting equipment to be adjusted when the visual inspection instrument 5 is working. A servo motor is provided on the front side of the screw rod 172 and its output end is fixed to the screw rod 172. By starting the screw rod 172 to rotate, the baffle 173 and the baffle frame 174 can be driven to move, and the movement of the baffle frame 174 drives the lighting equipment to move to adjust the fill light position of the lighting equipment.

[0047] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0048] Finally, it should be noted that the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An online detection device for can pull rings on an assembly line, comprising a frame-type detection platform (1), characterized in that: The apparatus further comprises a detection frame (2), wherein the detection frame (2) is fixedly mounted on the front bottom of the rack detection platform (1), a conveyor line is provided on the rear side of the rack detection platform (1), a rejector is provided on the front side of the conveyor line, a control cabinet is provided on the right side of the rack detection platform (1), a lifting device (3) is provided inside the detection frame (2), a driving device (4) is fixedly mounted on the surface of the lifting device (3), a visual inspection instrument (5) is fixedly mounted on the bottom of the driving device (4), a fixing frame (6) is fixedly mounted on the bottom of the inner wall of the detection frame (2), a hollow plate (7) is fixedly mounted on the bottom of the visual inspection instrument (5), and a connecting plate (1) is slidably mounted on the inner wall of the hollow plate (7). (8), a connecting plate 2 (9) is slidably mounted on the inner wall of the hollow plate (7), an elastic telescopic rod (10) is provided on the surface of the lifting device (3), an energy absorbing plate (11) is fixedly mounted on the inner wall of the elastic telescopic rod (10), a delay frame (12) is slidably penetrated through the upper and lower walls of the energy absorbing plate (11), an energy absorbing hole (13) is provided on the top of the energy absorbing plate (11), a delay hole (14) is provided on the top of the delay frame (12), a baffle assembly for preventing liquid from splashing inside the can is provided inside the lifting device (3), a fill light assembly is provided on the surface of the detection frame (2), and the visual inspection instrument (5) is used to perform a fluid tightness test on the pull ring of the can by applying light.

2. The on-line detection device for can pull rings on an assembly line according to claim 1, characterized in that: A U-shaped rod (15) is fixedly installed on the top of the visual inspection instrument (5), a spring is provided between the energy absorption plate (11) and the delay frame (12), the energy absorption hole (13) is in contact with the delay hole (14), and the free end of the elastic telescopic rod (10) is fixedly connected to the lifting device (3).

3. The on-line detection device for can pull rings on an assembly line according to claim 2, characterized in that: A sealing ring 1 is provided between the free end of the elastic telescopic rod (10) and the fixed end of the elastic telescopic rod (10), a liquid is provided inside the hollow plate (7), a sealing ring 2 is provided between the hollow plate (7) and the connecting plate 1 (8), an exhaust hole is provided at the bottom of the circumferential surface of the elastic telescopic rod (10), and a mesh plate is fixedly installed inside the exhaust hole.

4. The on-line detection device for can pull rings on an assembly line according to claim 3, characterized in that: A sealing ring 3 is provided between the hollow plate (7) and the second connecting plate (9), the first connecting plate (8) contacts the fixing frame (6), a spring 2 is provided between the hollow plate (7) and the first connecting plate (8), and a spring 3 is provided between the hollow plate (7) and the second connecting plate (9).

5. The on-line detection device for can pull rings on an assembly line according to claim 4, characterized in that: The barrier assembly comprises a leak-stopping hole (161), a leak-stopping plate (162), a rubber plate (164), a support rod (165) and a hanging rod (166); the leak-stopping hole (161) is opened at the bottom end of the lifting device (3); the leak-stopping plate (162) is slidably mounted on the inner wall of the leak-stopping hole (161); the rubber plate (164) is fixedly mounted on the bottom of the leak-stopping plate (162); the support rod (165) is fixedly mounted on the bottom of the inner wall of the detection frame (2); and the hanging rod (166) is fixedly mounted on the bottom of the rubber plate (164).

6. The on-line detection device for can pull rings on an assembly line according to claim 5, characterized in that: The leak-stopping plate (162) is slidably connected to the support rod (165), a leak-stopping spring (163) is provided between the leak-stopping hole (161) and the leak-stopping plate (162), and the rubber plate (164) is in contact with the lifting device (3).

7. The on-line detection device for can pull rings on an assembly line according to claim 6, characterized in that: The fill light assembly comprises a stop plate (171), a screw rod (172) and a baffle (173), wherein the stop plate (171) is slidably mounted on the bottom of the detection frame (2), the screw rod (172) is rotatably mounted on a side of the detection frame (2) close to the U-shaped rod (15), and the baffle (173) is slidably mounted on a side of the detection frame (2) close to the screw rod (172), and the baffle (173) is threadedly connected to the screw rod (172).

8. The on-line detection device for can pull rings on an assembly line according to claim 7, characterized in that: The fill light assembly further comprises a baffle (174), a baffle rod (175), a baffle plate (176) and a lighting device, wherein the baffle frame (174) is fixedly mounted on the bottom of the baffle plate (173), the baffle rod (175) is fixedly mounted on a side of the screw rod (172) close to the stop plate (171), the baffle plate (176) is fixedly mounted on the circumferential surface of the baffle rod (175), and the lighting device is arranged on the inner wall of the baffle frame (174).

9. The on-line detection device for can pull rings on an assembly line according to claim 8, characterized in that: A spring (4) is provided between the stop plate (171) and the detection frame (2); a limiting groove is provided on the circumferential surface of the baffle (176); a side of the stop plate (171) close to the suspension rod (166) is provided as an inclined surface; and a side of the stop plate (171) close to the baffle (176) is provided as an arc surface.

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