A square bottle body label detection device and method

Abstract

The present application relates to the technical fields of label detection, and discloses a square bottle body label detection device, which comprises a visual detection mechanism, a parallel four-bar pushing mechanism, a bearing table, a rotating mechanism and a turnover mechanism. The rotating mechanism is installed in the shell and used for driving the rotation of the rotating table. The turnover mechanism is installed in the shell and used for driving the turnover of the frame. The parallel four-bar pushing mechanism is arranged. The bearing table is driven by the rotating disc 1 and the rotating disc 2 to ascend or descend in a horizontal state. The square bottles are transferred from the conveying belt to the bearing table during the conveying process. The adjacent square bottles are staggered in the horizontal direction and the vertical direction on the bearing table. The problem of unequal spacing between the square bottles and mutual shielding caused by the slipping of the conveying belt is effectively avoided. The visual detection mechanism can completely and unobstructedly collect the label images of each square bottle, and the accuracy and reliability of the detection are improved.

Description

Technical Field

[0001] This invention relates to the field of label detection technology, specifically to a device and method for detecting labels on square bottles. Background Technology

[0002] On automated filling production lines, square bottles typically require pre-attached product labels before filling. After the labeling process is completed, to ensure that the product quality and appearance meet the requirements, the label attachment status must be inspected to reject unqualified products such as those without labels, with crooked labels, incorrect front and back labels, or inverted labels.

[0003] Currently, the inspection of labels on square bottles commonly employs 360° vision inspection mechanisms. These mechanisms utilize multiple cameras or a surround imaging system to capture images of the bottle body from all angles, enabling automatic identification of label attachment status. In a typical production process, the square bottles are conveyed to the vision inspection station by a conveyor belt, where online inspection is completed during continuous transport.

[0004] However, in actual production processes, the above-mentioned detection methods have the following technical problems:

[0005] Firstly, due to the high speed of the conveyor belt, the square bottles may slip relative to the belt surface during transport, resulting in slippage. Slippage causes the actual transport position of the bottles to shift, resulting in lag and disrupting the original equidistant arrangement of the bottles. When the distance between adjacent bottles decreases or they even touch, mutual occlusion occurs between the bottles, preventing the visual inspection agency from completely and clearly capturing the label images of each bottle's surface, creating blind spots and severely affecting the accuracy and reliability of the inspection.

[0006] Secondly, for square bottles with fully enclosed labels, one end of the label is attached to the bottle body, while the other end overlaps and is attached to the outside of the label. This type of label structure is prone to defects during labeling, such as the label not adhering tightly to the bottle body, ineffective adhesion at the overlap, or gaps between the label and the bottle body due to the label not completely covering the bottle body. These defects pertain to issues of adhesion firmness and integrity of the enclosed area, and are difficult to effectively identify using only visual inspection methods. Visual inspection primarily focuses on the visual features of the label's position, pattern, and text. It lacks the direct detection capability for physical defects such as the tightness of the adhesion between the label and the bottle body, the adhesion status of the overlap area, and the presence of internal gaps, thus reducing the comprehensiveness and accuracy of the overall inspection. Summary of the Invention

[0007] The purpose of this invention is to address the shortcomings of existing technologies by providing a label detection device and method for square bottles, so as to achieve comprehensive detection of the label appearance and adhesion quality of square bottles under stable and unobstructed conditions.

[0008] The objective of this invention can be achieved through the following technical solutions:

[0009] A label detection device for square bottles includes a base, on which a housing, two sets of conveyor belts, and a rejection assembly are mounted. The device also includes:

[0010] A visual inspection mechanism, comprising a housing, which is fixed to and communicates with an outer shell, and an inspection camera and several sets of reflectors are installed inside the housing;

[0011] A parallel four-bar pusher mechanism, comprising a turntable one and a turntable two, wherein one side of the turntable one is connected to a drive component mounted on a base, and one side of the turntable two is rotatably connected to a bracket mounted on a base, the turntable one and the turntable two are not coaxial and the turntable two is located above the turntable one;

[0012] The support platform has several sets of support platforms installed between turntable one and turntable two. Each support platform has a bushing on one side and a support plate on the other side. The support plate has a shaft rod. The bushing is rotatably installed on turntable one and the shaft rod is rotatably installed on turntable two. Turntable one and turntable two make the support platform rise or fall in a horizontal state. A frame is rotatably installed on the top of the support platform along the axis of the bushing, and a turntable is rotatably installed inside the frame.

[0013] A rotating mechanism is installed inside the housing to drive the turntable to rotate;

[0014] A flipping mechanism is installed inside the housing to drive the frame to flip.

[0015] As a further embodiment of the present invention: the rotating mechanism includes a gear ring and a rotating cylinder. The gear ring is fixed inside the outer shell and coaxial with the turntable. The rotating cylinder is rotatably installed inside the bushing. One end of the rotating cylinder is provided with a limiting gear, which meshes with the gear ring. The other end of the rotating cylinder is provided with a main bevel gear. A driven bevel gear that meshes with the main bevel gear is rotatably installed longitudinally inside the support platform. The other end of the driven bevel gear shaft is provided with a main gear. A universal joint is provided on the turntable. The other end of the universal joint is provided with a driven gear that meshes with the main gear.

[0016] As a further embodiment of the present invention: the flipping mechanism includes a guide ring, a movable rod, and a push plate. The guide ring is fixed inside the outer shell and coaxial with the turntable. A guide groove is provided on the guide ring, and a protrusion one and a protrusion two are respectively provided in the guide groove. The protrusion one and the protrusion two are respectively close to the two sets of conveyor belts. The movable rod is slidably installed in the rotating drum. One end of the movable rod is provided with a guide ball, which is embedded in the guide groove and moves along the guide groove. The other end of the movable rod is provided with a bending rod. The push plate is installed in the support platform and supports the frame. A groove is provided on the push plate, and the bending rod is located in the groove. An elastic element one is connected between the area of ​​the bottom of the frame near the push plate and the bottom of the inner cavity of the support platform.

[0017] As a further embodiment of the present invention: the trough includes a straight trough, an ascending trough and a descending trough, the bending rod moves along the straight trough, the ascending trough and the descending trough, a protrusion is provided at the connection between the straight trough and the ascending trough, and an elastic element is connected between the push plate and the bottom of the inner cavity of the support platform.

[0018] As a further embodiment of the present invention: the top of the support platform is provided with a table surface, the top of the frame is located above the table surface when it is horizontal, and the top of the turntable is located above the frame when it is horizontal.

[0019] As a further aspect of the present invention: an air blowing mechanism is installed on the bracket, the air blowing mechanism includes an air blowing ring and several sealing strips, the air blowing ring is fixed on the bracket, and the air blowing ring has air grooves corresponding to the support platform rising from the horizontal to the highest point and falling from the highest point to the horizontal. The air grooves are connected to an external air blowing unit, and several sets of arc-shaped sealing strips are rotatably installed on the air blowing ring. A through hole is formed between two adjacent sets of sealing strips, and the shaft passes through the through hole, and the end face of the shaft abuts against the outer surface of the air groove.

[0020] As a further embodiment of the present invention: flow channels are provided in the shaft, support plate and bearing platform, a rotating shaft is provided on the frame for the frame to rotate, the rotating shaft is hollow inside, a U-shaped air cavity is also provided in the frame, the flow channels are connected to the air cavity through the rotating shaft, a number of air jet holes are provided on the top of the frame, and two sets of air pumps are symmetrically provided in the housing, the air pumps blow air from top to bottom, and the air jet holes blow air from bottom to top.

[0021] As a further embodiment of the present invention: a blocking component is installed on the base, the blocking component is located at the conveyor belt in the feeding direction of the square bottle, the blocking component includes a fixed sleeve, the fixed sleeve is fixed on the base, an arc plate is slidably installed inside the fixed sleeve, an elastic element four is connected between the arc plate and the inside of the fixed sleeve, two sets of arc strips are symmetrically arranged on the top of the arc plate, a stop block is provided on the side of the arc strips near the bearing platform, two sets of pressure rods are symmetrically slidably installed on the side of the bearing platform facing the blocking component, an end plate is provided at one end of the pressure rod, an elastic element two is connected between the end plate and the inner wall of the bearing platform, and the pressure rod and the stop block are pressed together.

[0022] A detection method for a square bottle label detection device, the method being applied to the square bottle label detection device as described above, the method comprising the following steps:

[0023] Step S1: Feeding, the square bottles are fed into the support platform in sequence;

[0024] Step S2: Lifting and flipping feeding: The parallel four-bar pushing mechanism drives the support platform to rise horizontally, while the flipping mechanism drives the frame to flip, so that the square bottle slides onto the turntable.

[0025] Step S3: Rotation detection. During the movement of the support platform, the rotating mechanism drives the square bottle to rotate, and the visual inspection mechanism performs ° image acquisition.

[0026] Step S4: Defect magnification. The flipping mechanism vibrates the edge, and the airflow generated by the blowing mechanism affixes the label to the defect, which is then magnified and inspected by the visual inspection mechanism.

[0027] Step S5: Tilting and discharging. During the descent of the support platform, the frame flips in the discharge direction, and the square bottle slides to the conveyor belt for delivery.

[0028] Step S6: Rejection. Unqualified square bottles are rejected by the rejection component.

[0029] The beneficial effects of this invention are:

[0030] (1) By setting up a parallel four-bar pushing mechanism, the present invention uses turntable one and turntable two to drive the carrier platform to rise or fall in a horizontal state, so that the square bottles are transferred from the conveyor belt to the carrier platform during the conveying process, and the carrier platform staggers the adjacent square bottles in the horizontal and vertical directions, which effectively avoids the problem of uneven spacing and mutual obstruction of square bottles caused by conveyor belt slippage, and ensures that the visual inspection mechanism can collect the label image of each square bottle completely and without obstruction, thus improving the accuracy and reliability of the inspection.

[0031] (2) By setting up a rotating mechanism, the present invention uses the meshing transmission of the gear ring and the limiting gear to drive the turntable to rotate during the movement of the support platform, so that the square bottle can rotate during the detection process. Combined with the vision detection mechanism, it can realize the acquisition of images of the bottle body without blind spots, further eliminating the detection blind spots and ensuring that all sides of the label can be effectively detected.

[0032] (3) By setting up a flipping mechanism and an air blowing mechanism, when the carrier platform moves to a specific position, the flipping and shaking of the frame and the action of the bidirectional airflow amplify the bonding defects such as the label not being tightly attached to the bottle body, the label overlap not being effectively bonded, and the gap between the label and the bottle body, so that the visual inspection mechanism can accurately identify such physical defects and realize comprehensive inspection of the label appearance and bonding quality.

[0033] (4) By setting up a blocking component, the present invention uses the cooperation of the pressure rod and the stop block to achieve intermittent blocking and release of the square bottle, ensuring that the square bottle enters the carrier platform in an orderly manner. At the same time, when the pressure rod passes the stop block, it generates vibration, which, together with the shaking action of the flipping mechanism, further amplifies the label adhesion defect and improves the detection sensitivity. Attached Figure Description

[0034] The invention will now be further described with reference to the accompanying drawings.

[0035] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0036] Figure 2 This is a schematic diagram of the internal structure of the outer shell of the present invention;

[0037] Figure 3 This is a schematic diagram of the support platform structure in this invention;

[0038] Figure 4 This is a schematic diagram of the support platform from another perspective in this invention;

[0039] Figure 5 This is a schematic diagram of the parallel four-bar pusher mechanism in this invention;

[0040] Figure 6 This is a schematic diagram of the internal structure of the support platform in this invention;

[0041] Figure 7 This is a schematic diagram of the cross-sectional structure of the support platform in this invention;

[0042] Figure 8 This is a schematic diagram of the air blowing mechanism in this invention;

[0043] Figure 9 This is a schematic diagram of the guide ring structure in this invention;

[0044] Figure 10 This is a schematic diagram of the push plate structure in this invention;

[0045] Figure 11 This is a schematic diagram of the blocking mechanism in this invention.

[0046] In the picture:

[0047] 1. Base; 2. Vision inspection mechanism; 21. Housing; 22. Inspection camera; 23. Reflector; 24. Air pump; 3. Parallel four-bar pusher mechanism; 31. Turntable one; 311. Drive component; 32. Turntable two; 321. Bracket; 4. Support platform; 41. Frame; 411. Rotating shaft; 412. Air chamber; 413. Air jet hole; 42. Turntable; 43. Support plate; 431. Shaft; 432. Flow channel; 44. Table surface; 45. Bushing; 46. Elastic component one; 47. Pressure rod; 471. End plate; 48. Elastic component two; 5. Rotation mechanism; 51. Gear ring; 52. Rotary cylinder; 53. Limit gear; 54. Main bevel gear; 55. Driven bevel gear; 56. Main gear; 57. Driven gear; 58. Universal joint; 6. Tilting mechanism; 61. Guide ring; 611. Guide groove; 612. Protrusion 1; 613. Protrusion 2; 62. Movable rod; 63. Guide ball; 64. Bending rod; 65. Push plate; 651. Groove; 6511. Straight groove; 6512. Rising groove; 6513. Sinking groove; 652. Protrusion; 66. Elastic element 3; 7. Air blowing mechanism; 71. Air blowing ring; 72. Air groove; 73. Seal; 74. Through hole; 8. Blocking assembly; 81. Fixing sleeve; 82. Arc plate; 83. Arc strip; 84. Stop block; 85. Elastic element 4; 9. Housing; 10. Conveyor belt; 11. Rejection assembly. Detailed Implementation

[0048] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0049] like Figures 1-10 As shown, a square bottle label detection device includes a base 1, on which a housing 9, two sets of conveyor belts 10, and a set of rejection components 11 are mounted. The device also includes:

[0050] The visual inspection mechanism 2 includes a housing 21, which is fixed to and communicates with the outer shell 9. An inspection camera 22 and several sets of reflectors 23 are installed inside the housing 21.

[0051] The parallel four-bar pusher mechanism 3 includes a turntable 31 and a turntable 32. One side of the turntable 31 is connected to the drive component 311 mounted on the base 1, and one side of the turntable 32 is rotatably connected to the bracket 321 mounted on the base 1. The turntable 31 and the turntable 32 are not coaxial and the turntable 32 is located above the turntable 31.

[0052] Several sets of bearing platforms 4 are installed between the bearing platform 4, turntable 1 31 and turntable 2 32. A bushing 45 is provided on one side of the bearing platform 4 and a support plate 43 is provided on the other side. A shaft 431 is provided on the support plate 43. The bushing 45 is rotatably installed on turntable 1 31 and the shaft 431 is rotatably installed on turntable 2 32. Turntable 1 31 and turntable 2 32 make the bearing platform 4 rise or fall in a horizontal state. A frame 41 is rotatably installed on the top of the bearing platform 4 along the axis of the bushing 45. A turntable 42 is rotatably installed inside the frame 41.

[0053] Rotating mechanism 5, a rotating mechanism 5 for driving the turntable 42 to rotate is installed inside the housing 9;

[0054] The flipping mechanism 6 is installed inside the housing 9 to drive the frame 41 to flip.

[0055] In one embodiment, the rejection component 11 may be a pneumatic mechanism or cylinder, etc., used to push the square bottle corresponding to the unqualified label off the conveyor belt 10.

[0056] In practical application, the square bottle is conveyed into the housing 9 by the conveyor belt 10 and moved to the top of the support platform 4. At the same time, the drive unit 311 drives the turntable 31 to rotate. Since the other end of the support platform 4 is restricted by the support plate 43 and the shaft 431, and the turntable 32 rotates freely, the top of the support platform 4 always faces upward and remains horizontal while rotating around the turntable 31. This allows the support platform 4 to convey the square bottle from bottom to top and then from top to bottom, eventually moving it to another set of conveyor belts 10. If the label is qualified, the square bottle will continue to move. If the label is unqualified, the rejection component 11 will reject the unqualified square bottle. During the process of the square bottle being conveyed by the support platform 4, adjacent square bottles are separated and staggered both horizontally and vertically, effectively avoiding the obstruction of the bottle body and avoiding detection blind spots. This ensures that the bottle body is completely detected and is not easily affected by the labels of adjacent bottles, thereby improving the accuracy and reliability of the detection.

[0057] During the inspection of the square bottle, the rotating mechanism 5 drives the turntable 42 to rotate, so that the square bottle is in a rotating state when it is transported by the carrier platform 4. This can further avoid the occurrence of blind spots in the inspection and further improve the accuracy and reliability of the inspection.

[0058] Furthermore, the rotating mechanism 5 includes a gear ring 51 and a rotating cylinder 52. The gear ring 51 is fixed inside the housing 9 and coaxial with the turntable 31. The rotating cylinder 52 is rotatably installed inside the bushing 45. One end of the rotating cylinder 52 is provided with a limiting gear 53, which meshes with the gear ring 51. The other end of the rotating cylinder 52 is provided with a main bevel gear 54. A driven bevel gear 55 that meshes with the main bevel gear 54 is rotatably installed longitudinally inside the bearing platform 4. The other end of the shaft of the driven bevel gear 55 is provided with a main gear 56. A universal joint 58 is provided on the turntable 42. The other end of the universal joint 58 is provided with a driven gear 57 that meshes with the main gear 56.

[0059] In one embodiment, there is a certain gap between the turntable 42 and the frame 41, which ensures that the turntable 42 is not easily affected by the flipping of the frame 41 while rotating. It should also be noted that by setting the gear ratio of the gear ring 51 and the limiting gear 53, as well as the gear ratio of the main gear 56 and the driven gear 57, the square bottle rotates at least one revolution when the support platform 4 rotates half a revolution around the turntable 31. Taking the square bottle rotating one revolution as an example, the gear ratio of the gear ring 51 and the limiting gear 53 can be set to 3:1, and the gear ratio of the main gear 56 and the driven gear 57 is 1:1.

[0060] In practical application, during the movement of the support platform 4, the limiting gear 53 moves along the gear ring 51, thereby causing the rotating drum 52 to rotate. Through the cooperation of the main bevel gear 54, the driven bevel gear 55, the main gear 56, the driven gear 57 and the universal joint 58, the turntable 42 rotates, so that the square bottle rotates at least one revolution during the detection process, thereby avoiding the occurrence of detection blind spots and ensuring that all sides of the label on the square bottle can be detected, further improving the accuracy and reliability of the detection.

[0061] Furthermore, the flipping mechanism 6 includes a guide ring 61, a movable rod 62, and a push plate 65. The guide ring 61 is fixed inside the outer shell 9 and coaxial with the turntable 31. A guide groove 611 is provided on the guide ring 61. A protrusion 612 and a protrusion 613 are respectively provided in the guide groove 611. The protrusion 612 and the protrusion 613 are respectively close to the two sets of conveyor belts 10. The movable rod 62 is slidably installed in the rotating drum 52. One end of the movable rod 62 is provided with a guide ball 63. The guide ball 63 is embedded in the guide groove 611 and moves along the guide groove 611. The other end of the movable rod 62 is provided with a bending rod 64. The push plate 65 is installed in the support platform 4 and supports the frame 41. A groove 651 is provided on the push plate 65. The bending rod 64 is located in the groove 651. An elastic element 46 is connected between the bottom of the frame 41 near the push plate 65 and the bottom of the inner cavity of the support platform 4.

[0062] The trough 651 includes a straight trough 6511, an ascending trough 6512, and a sinking trough 6513. The bent rod 64 moves along the straight trough 6511, the ascending trough 6512, and the sinking trough 6513. A protrusion 652 is provided at the connection between the straight trough 6511 and the ascending trough 6512. An elastic element 66 is connected between the push plate 65 and the bottom of the inner cavity of the support platform 4.

[0063] The top of the support platform 4 has a table surface 44. When the top of the frame 41 is horizontal, it is located above the table surface 44. When the top of the turntable 42 is horizontal, it is located above the frame 41.

[0064] In one embodiment, the height of bump 2 613 is greater than the height of bump 1 612.

[0065] In practical application, during the process of the support platform 4 moving from bottom to top to be flush with the conveyor belt 10, the guide ball 63 will move to the protrusion 612. At this time, the movable rod 62 will move inward to the support platform 4, and the bending rod 64 will move from the straight groove 6511 to the rising groove 6512. At this time, the push plate 65 will move downward. Under the pulling force of the elastic element 46, the frame 41 will flip in the direction of feeding the square bottle. At this time, the edge of the frame 41 is aligned with the table surface 44, which makes it convenient for the square bottle to move onto the frame 41 and move onto the turntable 42 under the action of inertia. At the same time, the square bottle is conveyed at high speed by the conveyor belt 10. Due to the inclination of the frame 41, the square bottle is buffered when it moves onto the support platform 4, thus preventing the square bottle from falling off the support platform 4 after crossing the frame 41 and the turntable 42.

[0066] As the support platform 4 moves from the horizontal to the initial section at its highest point, the guide ball 63 passes over the protrusion 612. At this time, the movable rod 62 moves outward from the support platform 4, and the bending rod 64 returns from the rising groove 6512 to the straight groove 6511. The push plate 65 then moves upward, causing the frame 41 to return to a horizontal state, ensuring the square bottle is horizontal and maintaining its stability during rotation. When the bending rod 64 moves to the junction of the rising groove 6512 and the straight groove 6511, it contacts the protrusion 652. When the bending rod 64 passes over the protrusion... When part 652 is in operation, the push plate 65 moves upward rapidly under the rebound action of the elastic element 3 66, and shakes during this process. At this time, the elastic element 1 46 also shakes, which causes the frame 41 to be in a shaking state. If the label of the square bottle is not tightly attached to the bottle body and the label overlap, the label may move down or come apart due to the shaking. This can be detected immediately during visual inspection, thus amplifying the defect of the label with low adhesion and ensuring that the visual inspection method can effectively identify it.

[0067] As the support platform 4 moves downward from its highest point, the guide ball 63 moves to the second protrusion 613. At this time, the movable rod 62 moves into the support platform 4, and the bending rod 64 first moves from the straight groove 6511 to the rising groove 6512, and then from the rising groove 6512 to the sinking groove 6513. During this process, the frame 41 first flips in the direction of feeding the square bottle, and then flips in the direction of discharging the square bottle, until the edge of the frame 41 is flush with the table surface 44. At this time, the frame 41 and the turntable 42 are tilted, which makes it easier for the square bottle to slide downward and move to another set of conveyor belts 10.

[0068] Furthermore, an air blowing mechanism 7 is installed on the bracket 321. The air blowing mechanism 7 includes an air blowing ring 71 and several sealing strips 73. The air blowing ring 71 is fixed on the bracket 321. The air blowing ring 71 has air grooves 72 corresponding to the support platform 4 when it rises from the horizontal to the highest point and when it falls from the highest point to the horizontal. The air grooves 72 are connected to the external air blowing unit. Several sets of arc-shaped sealing strips 73 are rotatably installed on the air blowing ring 71. A through hole 74 is formed between two adjacent sets of sealing strips 73. The shaft 431 passes through the through hole 74, and the end face of the shaft 431 abuts against the outer surface of the air groove 72.

[0069] The shaft 431, the support plate 43 and the bearing platform 4 are provided with flow channels 432. The frame 41 is provided with a rotating shaft 411 for the frame 41 to rotate. The rotating shaft 411 is hollow inside. The frame 41 is also provided with a U-shaped air cavity 412. The flow channel 432 is connected to the air cavity 412 through the rotating shaft 411. Several air jet holes 413 are provided on the top of the frame 41. Two sets of air pumps 24 are symmetrically provided in the housing 21. The air pumps 24 blow air from top to bottom, and the air jet holes 413 blow air from bottom to top.

[0070] In one embodiment, the two sets of air troughs 72 and the two sets of air pumps 24 are divided into two groups longitudinally. The air output of the air trough 72 near the feeding direction of the square bottle can be set to be small, and the air output of the air pump 24 near the feeding direction of the square bottle can be set to be large. The air output of the air trough 72 near the discharging direction of the square bottle can be set to be large, and the air output of the air pump 24 near the discharging direction of the square bottle can be small.

[0071] In practical application, during the process of the support platform 4 moving from horizontal to the highest point, the corresponding shaft 431 on the support platform 4 will move to the air groove 72 with a small air volume. The gas enters the flow channel 432, and then enters the air chamber 412 through the rotating shaft 411. Finally, it is ejected upward from several jet holes 413. At the same time, the air pump 24 blows air downward. If the label is not tightly attached to the bottle body, the label overlap is not effectively bonded, or the label does not completely wrap the bottle body, resulting in a gap between the label and the bottle body, the label that is not tightly attached to the bottle body will move downward, the label that is not effectively bonded at the overlap will spread out, and the label with a gap between it and the bottle body will bulge, causing the outer circle size of the label to become larger. This can magnify the label defect and ensure that the visual inspection method can effectively identify it. Since the air volume of the air pump 24 is large at this time, the label is subjected to a large downward force. If the gap between the label and the upper part of the bottle body is large or not effectively bonded, such defects will be magnified.

[0072] As the support platform 4 moves downwards from its highest point, if the label is not tightly attached to the bottle body, the overlapping area of ​​the label is not effectively bonded, or the label does not completely cover the bottle body, resulting in a gap between the label and the bottle body, the label that is not tightly attached to the bottle body will move upwards, the label that is not effectively bonded at the overlapping area will spread out, and the label with a gap between it and the bottle body will bulge, causing the outer circle size of the label to increase. This can further amplify the label defect, ensuring that visual inspection methods can effectively identify it. Because the air volume of the air jet vent 413 is large at this time, the label is subjected to... The upward force is relatively large. If the gap between the label and the lower half of the bottle is large or the label is not effectively bonded, such defects will be amplified. At the same time, if the label is blown down or spread out in front, the label will move upward, and the spread-out label will float upward, thus preventing the label from falling to the bottom of the bottle. This would prevent the square bottle from becoming unstable when moving on the conveyor belt 10 or from getting stuck because the conveyor belt 10 is a chain. In addition, the large upward air volume can help the square bottle slide on the inclined frame 41 and help the square bottle move onto the conveyor belt 10, ensuring the continuity of the inspection.

[0073] like Figure 7 and Figure 10 As shown, a blocking assembly 8 is installed on the base 1. The blocking assembly 8 is located at the conveyor belt 10 in the direction of feeding the square bottle. The blocking assembly 8 includes a fixed sleeve 81, which is fixed on the base 1. An arc plate 82 is slidably installed inside the fixed sleeve 81. An elastic element 85 connects the arc plate 82 and the inside of the fixed sleeve 81. Two sets of arc strips 83 are symmetrically arranged on the top of the arc plate 82. A stop block 84 is provided on the side of the arc strip 83 near the support platform 4. Two sets of pressure rods 47 are symmetrically slidably installed on the side of the support platform 4 facing the blocking assembly 8. One end of the pressure rod 47 is provided with an end plate 471. An elastic element 48 connects the end plate 471 and the inner wall of the support platform 4. The pressure rod 47 and the stop block 84 are pressed together.

[0074] In practical application, when the square bottle moves from the conveyor belt 10 to the support platform 4, the arc plate 82 is located below the conveyor belt 10. The square bottle moves through the two sets of arc bars 83 to the support platform 4. When the support platform 4 moves, the two sets of pressure rods 47 are blocked by the stop block 84, thereby driving the arc bar 83 to move upward, so that the arc plate 82 moves above the conveyor belt 10, thus blocking the square bottle on the conveyor belt 10. The support platform 4 continues to move, and the pressure rod 47 retracts into the support platform 4 under the squeezing action of the stop block 84, so that the pressure rod 47 passes the stop block 84. At this time, under the rebound action of the elastic element 85, the arc plate 82 and the arc bar 83 return to their original positions. At this time, the support platform 4 below moves to this position, and the arc plate 82 no longer blocks the square bottle. The square bottle then moves to the support platform 4, ensuring the continuity of detection.

[0075] In addition, after the pressure bar 47 passes the stop block 84, the elastic element 48 causes the pressure bar 47 to return to its original position. During this process, the support platform 4 will vibrate. Combined with the shaking caused by the bending bar 64 passing the protrusion 652, the shaking of the frame 41 can be aggravated, further amplifying the defects of labels with low adhesion, and further ensuring that visual inspection methods can effectively identify them.

[0076] A detection method for a square bottle label detection device, the method being applied to the square bottle label detection device as described above, the method comprising the following steps:

[0077] Step S1: Feeding. The square bottle is conveyed to the inlet of the outer shell 9 by the conveyor belt 10. The blocking component 8 intermittently blocks the square bottle, so that the square bottle enters the frame 41 on the support platform 4 in sequence.

[0078] Step S21: Lifting and conveying, the drive component 311 drives the parallel four-bar pusher mechanism 3 to move, so that the bearing platform 4 moves from bottom to top while maintaining a horizontal state, and staggers the square bottle with the subsequent square bottle in the horizontal and vertical directions.

[0079] Step S22: Flip the feed. When the support platform 4 moves from bottom to top and is flush with the conveyor belt 10, the flipping mechanism 6 drives the frame 41 to flip in the feeding direction, and the square bottle slides onto the turntable 42. Then the frame 41 returns to the horizontal state.

[0080] Step S3: Rotation detection. As the support platform 4 continues to move, the rotating mechanism 5 drives the turntable 42 to rotate, causing the square bottle to rotate at the detection station. At the same time, the vision inspection mechanism 2 performs 360° image acquisition on the label on the square bottle.

[0081] Step S4: Defect magnification. During the movement of the support platform 4, the flipping mechanism 6 causes the frame 41 to vibrate. At the same time, the air blowing mechanism 7 and the air blowing pump 24 generate bidirectional airflow, which magnifies defects such as loose label adhesion, unbonded overlap, or gaps. The visual inspection mechanism 2 performs secondary inspection simultaneously.

[0082] Step S5: Turn over and discharge. When the support platform 4 moves down from the highest point to be flush with another set of conveyor belts 10, the turning mechanism 6 drives the frame 41 to turn in the discharge direction, so that the square bottle slides onto the conveyor belt 10.

[0083] Step S6: Rejection. Qualified square bottles are sent out via conveyor belt 10, while unqualified square bottles are rejected from conveyor belt 10 by rejection component 11.

Claims

1. A label detection device for square bottles, comprising a base (1), wherein the base (1) is provided with a housing (9), two sets of conveyor belts (10) and a set of rejection components (11), characterized in that, The device further includes: The visual inspection mechanism (2) includes a housing (21), which is fixed on the outer shell (9) and communicates with the outer shell (9). A detection camera (22) and several sets of reflectors (23) are installed inside the housing (21). The parallel four-bar pusher mechanism (3) includes a turntable one (31) and a turntable two (32). One side of the turntable one (31) is connected to a drive member (311) mounted on the base (1), and one side of the turntable two (32) is rotatably connected to a bracket (321) mounted on the base (1). The turntable one (31) and the turntable two (32) are not on the same axis and the turntable two (32) is located above the turntable one (31). The support platform (4) is provided with several sets of support platforms (4) installed between the turntable one (31) and the turntable two (32). The support platform (4) has a bushing (45) on one side and a support plate (43) on the other side. The support plate (43) has a shaft (431) on it. The bushing (45) is rotatably installed on the turntable one (31) and the shaft (431) is rotatably installed on the turntable two (32). The turntable one (31) and the turntable two (32) make the support platform (4) rise or fall in a horizontal state. The top of the support platform (4) is rotatably installed with a frame (41) along the axis of the bushing (45). The turntable (42) is rotatably installed inside the frame (41). Rotating mechanism (5), the housing (9) is equipped with a rotating mechanism (5) for driving the turntable (42) to rotate. A flipping mechanism (6) is installed inside the housing (9) for driving the frame (41) to flip.

2. The square bottle label detection device according to claim 1, characterized in that, The rotating mechanism (5) includes a gear ring (51) and a rotating cylinder (52). The gear ring (51) is fixed inside the outer shell (9) and coaxial with the turntable (31). The rotating cylinder (52) is rotatably installed inside the bushing (45). One end of the rotating cylinder (52) is provided with a limiting gear (53), which meshes with the gear ring (51). The other end of the rotating cylinder (52) is provided with a main bevel gear (54). The bearing platform (4) is rotatably installed longitudinally with a driven bevel gear (55) that meshes with the main bevel gear (54). The other end of the shaft of the driven bevel gear (55) is provided with a main gear (56). The turntable (42) is provided with a universal joint (58), and the other end of the universal joint (58) is provided with a driven gear (57) that meshes with the main gear (56).

3. The square bottle label detection device according to claim 2, characterized in that, The flipping mechanism (6) includes a guide ring (61), a movable rod (62), and a push plate (65). The guide ring (61) is fixed inside the outer shell (9) and coaxial with the turntable (31). A guide groove (611) is provided on the guide ring (61). A protrusion (612) and a protrusion (613) are respectively provided in the guide groove (611). The protrusion (612) and the protrusion (613) are respectively close to the two sets of conveyor belts (10). The movable rod (62) is slidably installed inside the rotating drum (52). One end is provided with a guide ball (63), which is embedded in the guide groove (611) and moves along the guide groove (611). The other end of the movable rod (62) is provided with a bending rod (64). The push plate (65) is installed in the support platform (4) and supports the frame (41). The push plate (65) has a groove (651) and the bending rod (64) is located in the groove (651). An elastic element (46) is connected between the area of ​​the bottom of the frame (41) near the push plate (65) and the bottom of the inner cavity of the support platform (4).

4. The square bottle label detection device according to claim 3, characterized in that, The trough (651) includes a straight trough (6511), an ascending trough (6512), and a sinking trough (6513). The bent rod (64) moves along the straight trough (6511), the ascending trough (6512), and the sinking trough (6513). A protrusion (652) is provided at the connection between the straight trough (6511) and the ascending trough (6512). An elastic element (66) is connected between the push plate (65) and the bottom of the inner cavity of the support platform (4).

5. The square bottle label detection device according to claim 4, characterized in that, The top of the support platform (4) is provided with a table surface (44), the top of the frame (41) is located above the table surface (44) when the top is horizontal, and the top of the turntable (42) is located above the frame (41) when the top is horizontal.

6. The square bottle label detection device according to claim 1, characterized in that, An air blowing mechanism (7) is installed on the bracket (321). The air blowing mechanism (7) includes an air blowing ring (71) and several seals (73). The air blowing ring (71) is fixed on the bracket (321). The air blowing ring (71) has air grooves (72) on the support platform (4) when it rises from the horizontal to the highest point and when it falls from the highest point to the horizontal. The air grooves (72) are connected to the external air blowing unit. Several sets of arc-shaped seals (73) are rotatably installed on the air blowing ring (71). A through hole (74) is formed between two adjacent sets of seals (73). The shaft (431) passes through the through hole (74), and the end face of the shaft (431) abuts against the outer surface of the air groove (72).

7. The square bottle label detection device according to claim 6, characterized in that, The shaft (431), support plate (43) and bearing platform (4) are provided with flow channels (432). The frame (41) is provided with a rotating shaft (411) for the frame (41) to rotate. The rotating shaft (411) is hollow inside. The frame (41) is also provided with a U-shaped air cavity (412). The flow channel (432) is connected to the air cavity (412) through the rotating shaft (411). The top of the frame (41) is provided with several air jet holes (413). Two sets of air pumps (24) are symmetrically provided inside the housing (21). The air pumps (24) blow air from top to bottom, and the air jet holes (413) blow air from bottom to top.

8. The square bottle label detection device according to claim 1, characterized in that, A blocking component (8) is installed on the base (1). The blocking component (8) is located at the conveyor belt (10) in the direction of feeding the square bottle. The blocking component (8) includes a fixed sleeve (81). The fixed sleeve (81) is fixed on the base (1). An arc plate (82) is slidably installed inside the fixed sleeve (81). An elastic element (85) is connected between the arc plate (82) and the inside of the fixed sleeve (81). Two sets of arc strips (83) are symmetrically arranged on the top of the arc plate (82). A stop block (84) is provided on the side of the arc strip (83) near the support platform (4). Two sets of pressure rods (47) are symmetrically slidably installed on the side of the support platform (4) facing the blocking component (8). An end plate (471) is provided at one end of the pressure rod (47). An elastic element (48) is connected between the end plate (471) and the inner wall of the support platform (4). The pressure rod (47) and the stop block (84) are pressed together.

9. A detection method for a square bottle label detection device, characterized in that, The method is applied to the square bottle label detection device as described in any one of claims 1-8 above, and the method includes the following steps: Step S1: Feeding, the square bottles are sequentially fed into the support platform (4). Step S2: Lifting and flipping feeding, the parallel four-bar pusher mechanism (3) drives the support platform (4) to rise horizontally, while the flipping mechanism (6) drives the frame (41) to flip, so that the square bottle slides onto the turntable (42); Step S3: Rotation detection. During the movement of the support platform (4), the rotating mechanism (5) drives the square bottle to rotate, and the visual inspection mechanism (2) performs 360° image acquisition. Step S4: Defect magnification, the flipping mechanism (6) makes the frame (41) vibrate, and the airflow generated by the blowing mechanism (7) will attach the label to the defect magnification, and the visual inspection mechanism (2) will perform the inspection. Step S5: Flipping and discharging. During the descent of the support platform (4), the frame (41) flips in the discharge direction, and the square bottle slides to the conveyor belt (10) for discharge. Step S6: Rejection. Unqualified square bottles are rejected by the rejection component (11).

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