Bottle cap detection machine

Abstract

According to the bottle cap detection machine provided by the utility model, after being arranged by the cap separating device, bottle caps are sequentially conveyed to the cap body detection device, the cap inner wall detection device and the cap inner bottom detection device, and the bottle caps are adsorbed by the suck-back conveying belt of the suck-back conveying device, so that all-directional detection of the cap bodies, the cap inner walls, the cap inner bottoms and the cap tops is realized; the fine adjustment assembly is arranged, the relative position of the conveying device and the suck-back conveying device is finely adjusted by adjusting the position of the fixing block on the sliding rod, the parallelism error of the conveying device and the suck-back conveying device above the conveying position is compensated, and the bottle cap suction success rate of the suck-back conveying device is increased; meanwhile, the frequency converter is arranged to intelligently adjust the air volume and the negative pressure of the negative-pressure fan, the suction force of the negative-pressure suction hole is controlled, the situation that defective bottle caps are removed due to too large suction force or the bottle caps fall off due to too small suction force is avoided, and it is guaranteed that the bottle caps are stably transited to the suck-back conveying device from the conveying device and are sucked and conveyed; and the detection efficiency of the bottle cap detection machine is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bottle cap detection, in particular to a bottle cap detection machine. Background Art

[0002] Due to production process and equipment parameter errors or aging, during the production process of bottle caps, bottle caps occasionally have defects such as cracks, wear, lack of materials, broken glue, and size specifications that do not meet standards, which affects the subsequent application of bottle caps in corresponding products and the quality of the products. Therefore, after the bottle caps are produced, they are usually visually inspected to check whether the produced bottle caps meet the use requirements.

[0003] In the prior art, there are some bottle cap detection devices that only detect one or two end faces of the bottle caps and cannot completely screen out defect-free bottle caps. In order to achieve all-round detection of bottle caps, a bottle cap detection device has appeared on the market, which uses a conveying device to cooperate with a reverse suction conveying device above it to convey and detect bottle caps. The conveying device detects whether there are defects on the front of the bottle cap, and then the bottle cap on the conveying device is reversely sucked under the reverse suction conveying device, and then the back of the bottle cap is detected to ensure the continuity of the detection. However, when the bottle cap is transferred from the conveying device to the reverse suction conveying device, the bottle cap may fail to be adsorbed or fall off after adsorption. For example, when the ground on which the device is placed is uneven or the device itself may have manufacturing errors or assembly errors, there is a height difference between the installation position of the conveying device and the reverse suction conveying device and their preset positions, which leads to a parallelism error between the conveying device and the reverse suction conveying device, making it impossible for the reverse suction conveying device to maintain good contact with its surface when adsorbing the bottle caps, and the pressure distribution between the reverse suction conveying device and the bottle caps is also uneven, resulting in a decrease in the success rate of adsorption; the suction force of the reverse suction conveying device on the bottle caps is too small, which can also lead to unsuccessful adsorption or bottle caps falling off. Bottle caps that fall in the middle of the process need to be manually inspected because they have not been fully inspected, which makes the inspection process incoherent or even interrupts the inspection, affecting the inspection efficiency of the bottle cap inspection.

[0004] Therefore, it is necessary to provide a bottle cap detection device that can realize all-round detection of bottle caps and ensure the continuity of the detection process and improve the detection efficiency. Utility Model Content

[0005] Aiming at the technical problems in the prior art that a bottle cap detection device which uses a conveying device to cooperate with a reverse suction conveying device above it to transmit and detect bottle caps has an incoherent detection process and low detection efficiency due to parallelism errors and insufficient suction between devices during the bottle cap reverse suction conversion transmission, the utility model provides a bottle cap detection machine.

[0006] A bottle cap inspection machine comprises a frame, a conveying device and a reverse suction conveying device arranged in the frame, a cap separating device, a cap body inspection device, a cap inner wall inspection device, a cap inner bottom inspection device and a first rejection device for rejecting unqualified bottle caps detected by the cap body inspection device, the cap inner wall inspection device and the cap inner bottom inspection device are arranged in sequence on the frame above the conveying device along the conveying direction, a cap top inspection device and a second rejection device are arranged in sequence on the frame below the reverse suction conveying device; the second rejection device is used to reject unqualified bottle caps detected by the cap top inspection device; the reverse suction conveying device is located above the conveying device, and one end of the reverse suction conveying device is connected to a The fine-tuning component is connected to one end of the conveying device; the fine-tuning component includes two bases respectively arranged on both sides of one end of the conveying device, and two fixed blocks arranged on both sides of one end of the reverse suction conveying device, the bases are provided with sliding bars, the fixed blocks are slidably arranged on the sliding bars, and the sliding bars are provided with locking blocks for fixing the positions of the fixed blocks, the reverse suction conveying device includes a reverse suction conveying frame, a reverse suction conveyor belt fixed on the reverse suction conveying frame and a negative pressure interface, a negative pressure fan arranged in the frame and a frequency converter for adjusting the frequency of the negative pressure fan, a plurality of negative pressure suction holes are provided on the reverse suction conveyor belt, and the negative pressure fan is connected with the negative pressure suction holes through the negative pressure interface.

[0007] Furthermore, a bottle cap recovery device for collecting fallen bottle caps is provided below the end of the conveying device close to one end of the reverse suction conveying device.

[0008] Furthermore, the capping device includes a guide rail arranged on the conveying device, a driving mechanism is provided above the guide rail, the driving mechanism is connected to two capping guide plates, and the capping guide plates are located on both sides of the guide rail; the driving mechanism drives the two capping guide plates to rotate and then pushes the bottle caps in the guide rail to move along the conveying direction.

[0009] Furthermore, the guide rail includes a left guide plate, a right guide plate and an upper limit guide bar, the left guide plate and the right guide plate are arranged on the conveying device, and a bottle cap conveying channel along the conveying direction is formed between the left guide plate and the right guide plate, and the upper limit guide bar is arranged above the bottle cap conveying channel.

[0010] Furthermore, the cover body detection device includes a first light source fixing plate and a first annular light source embedded in the first light source fixing plate, the first light source fixing plate is fixed on the frame on both sides by a first lifting structure, and the first light source fixing plate has a plurality of first cameras for cover body detection evenly arranged along the circumferential direction; the first annular light source is located directly above the conveying device; the cover inner wall detection device includes a second camera for detecting the inner wall of the cover, the second camera is arranged on the first light source fixing plate, and the lens of the second camera is facing the center hole area of ​​the first annular light source.

[0011] Furthermore, the cover inner bottom detection device includes a third camera for cover inner bottom detection and a second annular light source, the second annular light source is embedded in a second light source fixing plate, one side of the second light source fixing plate is fixed to the frame by a second lifting structure, the third camera is arranged on the second light source fixing plate, the second annular light source is located directly above the conveying device, and the lens of the third camera is facing the middle hole area of ​​the second annular light source.

[0012] Furthermore, the top cover detection device includes a fourth camera for top cover detection and a third annular light source, the third annular light source is embedded in a third light source fixing plate, one side of the third light source fixing plate is fixed to the frame through a third lifting structure, the fourth camera is arranged on the third light source fixing plate, the third annular light source is located directly below the inverted suction conveying device, and the lens of the fourth camera is facing the middle hole area of ​​the third annular light source.

[0013] Furthermore, it is characterized in that a photoelectric switch for detecting that the bottle cap reaches a preset position is provided on the conveying device between the cap separating device and the cap body detecting device and on the reverse suction conveying device of the cap top detecting device close to the conveying device.

[0014] Further, it is characterized in that the first rejection device includes a first high-speed solenoid valve and a first waste collecting bucket relatively arranged on both sides of the conveying device along the conveying direction, and the second rejection device includes a second high-speed solenoid valve and a second waste collecting bucket relatively arranged on both sides of the reverse suction conveying device along the conveying direction.

[0015] The beneficial effects of the utility model are as follows: the utility model provides a bottle cap inspection machine, which adopts the structure of a double conveying device of a conveying device and a reverse suction conveying device, and the bottle caps are sorted by a cap separating device and sequentially conveyed to a cap body inspection device, a cap inner wall inspection device and a cap inner bottom inspection device along the conveying direction of the conveying device, and the bottle caps are adsorbed by the reverse suction conveyor belt of the reverse suction conveying device, so that the bottle caps are reversely sucked and converted from the conveying device to the reverse suction conveying device, and are conveyed to the cap top inspection device, so that all-round inspection of the bottle cap body, cap inner wall, cap inner bottom and cap top is realized, thereby improving the inspection efficiency of the bottle cap inspection machine.

[0016] The utility model also provides a fine-tuning component, and by adjusting the position of the fixed block on the slide bar, the relative positions of the conveying device and the reverse suction conveying device are finely adjusted, so as to compensate for the parallelism error between the conveying device and the reverse suction conveying device above the conveying position, thereby improving the bottle cap adsorption success rate of the reverse suction conveying device; at the same time, a frequency converter is provided to intelligently adjust the air volume and negative pressure of the negative pressure fan, control the suction force of the negative pressure suction hole, avoid excessive suction force affecting the removal of defective bottle caps or insufficient suction force causing the bottle caps to fall, ensure that the bottle caps are smoothly transferred from the conveying device to the reverse suction transmission device and are adsorbed and conveyed, and further improve the detection efficiency of the bottle cap detection machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the overall appearance of a bottle cap inspection machine provided by the utility model;

[0018] Figure 2 A schematic diagram of the overall internal structure of a bottle cap inspection machine provided by the utility model;

[0019] Figure 3 A schematic diagram of the internal structure of a bottle cap inspection machine provided by the utility model;

[0020] Figure 4 for Figure 3 Part A in the figure is a schematic diagram of the enlarged structure of the fine-tuning component;

[0021] Figure 5 for Figure 3 A schematic diagram of a top view structure;

[0022] Figure 6 for Figure 5 Part B in the figure is an enlarged structural diagram of the cover separation device.

[0023] Figure ID

[0024] 1. Rack; 2. Conveying device; 3. Back-suction conveying device; 31. Back-suction conveying rack; 32. Back-suction conveyor belt; 33. Negative pressure interface; 34. Negative pressure suction hole; 35. Negative pressure fan; 36. Frequency converter; 4. Cover separation device; 41. Guide rail; 411. Left guide plate; 412. Right guide plate; 413. Upper limit guide strip; 42. Driving mechanism; 43. Cover separation guide plate; 5. Cover body detection device; 51. First light source fixing plate; 52. First annular light source; 53. First lifting structure; 54. First camera; 6. Cover inner wall detection device; 61. Second camera; 7. Cover inner bottom detection device; 71 , third camera; 72, second annular light source; 73, second light source fixing plate; 74, second lifting structure; 8, first rejection device; 81, first high-speed solenoid valve; 82, first waste collecting bucket; 9, cap top detection device; 91, fourth camera; 92, third annular light source; 93, third light source fixing plate; 94, third lifting structure; 10, second rejection device; 101, second high-speed solenoid valve; 102, second waste collecting bucket; 11, fine-tuning assembly; 111, base; 112, fixing block; 113, sliding rod; 114, locking block; 12, photoelectric switch; 13, bottle cap recovery device; 14, bottle cap. DETAILED DESCRIPTION

[0025] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this patent, and cannot be understood as limiting this patent.

[0026] refer to Figure 1 , Figure 2 As shown, a bottle cap inspection machine is used for inspecting common defects of bottle caps 14. It comprises a frame 1, a conveying device 2 and a reverse suction conveying device 3 arranged in the frame 1, a cap separating device 4, a cap body inspection device 5, a cap inner wall inspection device 6, a cap inner bottom inspection device 7 and a first rejecting device 8 for rejecting unqualified bottle caps 14 detected by the cap body inspection device 5, the cap inner wall inspection device 6 and the cap inner bottom inspection device 7 are arranged in sequence on the frame 1 above the conveying device 2 along the conveying direction, and a cap top inspection device 9 and a second rejecting device 10 are arranged in sequence on the frame 1 below the reverse suction conveying device 3, and the second rejecting device 10 is used to reject unqualified bottle caps 14 detected by the cap top inspection device.

[0027] By arranging the first rejection device 10 before the conveying device 2 transitions to the reverse suction transmission device 3, the bottle caps that have completed the cap body, cap inner wall and cap inner bottom inspection are rejected as unqualified products, so that even if the rejected bottle caps 14 fall, only the subsequent cap top inspection is required; at the same time, the inspection steps can be reduced, and there is no need to repeatedly inspect the bottle caps 14 that are unqualified in the cap body, cap inner wall and cap inner bottom inspection, thereby further improving the inspection efficiency of the bottle caps.

[0028] Specifically, refer to Figure 2 , Figure 3 and Figure 5 As shown, the reverse suction conveyor 3 includes a reverse suction conveyor frame 31, a reverse suction conveyor belt 32 fixed on the reverse suction conveyor frame 31 and a negative pressure interface 33, as well as a negative pressure fan 35 arranged in the frame 1 and a frequency converter 36 for adjusting the frequency of the negative pressure fan 35. The reverse suction conveyor belt 32 is provided with a plurality of negative pressure suction holes 34, and the negative pressure fan 35 is connected with the negative pressure suction holes 34 through the negative pressure interface 33. When the bottle caps 14 are conveyed to one end along the conveying direction with the conveying device 2, that is, conveyed to the bottom of the reverse suction conveyor 3, the negative pressure generated by the negative pressure fan 35 is connected to the negative pressure suction holes 34 on the reverse suction conveyor belt 32 through the negative pressure interface 33, forming a certain suction force, and these negative pressure suction holes 34 adsorb the bottle caps 14 on the lower conveying device 2 onto the reverse suction conveyor belt 32, and convey them with the movement of the reverse suction conveyor belt 32. At the same time, by setting the frequency converter 36 to adjust the frequency of the negative pressure fan 35, the air volume and negative pressure of the negative pressure fan 35 are intelligently adjusted to control the suction force of the negative pressure suction holes 34 on the reverse suction conveyor belt 32, so as to avoid excessive suction force affecting the removal of defective bottle caps 14 or insufficient suction force causing the bottle caps 14 to fall off, thereby ensuring that the bottle caps 14 are smoothly transferred from the conveying device 2 to the reverse suction transmission device 3 and are adsorbed and conveyed, thereby ensuring the detection efficiency of the bottle cap detection machine.

[0029] In this embodiment, the conveying device 2 has the same structure as the reverse suction conveying device 3 , but the suction force of the negative pressure suction holes 34 of its conveying belt is smaller than that of the negative pressure suction holes 34 of the reverse suction conveying belt 32 .

[0030] The reverse suction conveying device 3 is located above the conveying device 2, and one end of the reverse suction conveying device 3 is connected to one end of the conveying device 2 through a fine-tuning component 11; wherein, reference Figure 4 As shown, the fine-tuning component 11 includes two bases 111 respectively arranged on both sides of one end of the conveying device 2, and two fixed blocks 112 arranged on both sides of one end of the reverse suction conveying device 3, and the bases 111 are each provided with a sliding rod 113, and the fixed block 112 is slidably arranged on the sliding rod 113, and the sliding rod 113 is each provided with a locking block 114 for fixing the position of the fixed block 112.

[0031] By adjusting the position of the fixed block 112 on the slide bar 113, the relative position of the conveying device 2 and the reverse suction conveying device 3 can be finely adjusted, so as to compensate for the parallelism error between the conveying device 2 and the reverse suction conveying device 3 above the conveying position 2; when the parallelism error is low, the negative pressure suction hole 34 on the reverse suction conveyor belt 32 can maintain good contact with its surface when adsorbing the bottle cap 14, and the pressure distribution between the negative pressure suction hole 34 and the bottle cap 14 is more uniform, thereby improving the success rate of adsorption. In addition, the problem of a decrease in the success rate of adsorbing the bottle cap 14 by the reverse suction conveying device 3 due to the parallelism error between the conveying device 2 and the reverse suction conveying device 3 caused by the uneven ground on which the device is placed or the reasons of the device itself is avoided, and the effect of reverse suction conversion transmission of the bottle cap 14 is ensured, and the subsequent detection is smoothly carried out. After the adjustment is completed, the position of the fixed block 112 on the slide bar 113 is fixed by locking 114. In this embodiment, the slide bar 113 is a screw and the locking block 114 is a nut.

[0032] A bottle cap recovery device 13 for collecting dropped bottle caps 14 is provided below the end of the conveying device 2 near one end of the reverse suction conveying device 3. When the reverse suction conveyor belt 32 fails to successfully adsorb the bottle caps 14 that have arrived below the reverse suction conveying device 3, the bottle caps 14 continue to move with the conveying device 2 and fall into the bottle cap recovery device 13 for recovery, thereby preventing the bottle caps 14 that failed to be adsorbed from falling randomly and causing waste and other adverse effects. In this embodiment, the bottle cap recovery device 13 includes a drop collection shield and a collection bucket located below the drop collection shield.

[0033] refer to Figure 6 As shown, the capping device 4 includes a guide rail 41 disposed on the conveying device 2, a driving mechanism 42 is disposed above the guide rail 41, and the driving mechanism 42 is connected to two capping guide plates 43, and the capping guide plates 43 are located on both sides of the guide rail 41; the driving mechanism 42 drives the two capping guide plates 43 to rotate and then pushes the bottle caps 14 in the guide rail 41 to move along the conveying direction. By providing the capping device 4, the bottle caps 14 entering the guide rail 41 can be sorted to evenly convey the bottle caps 14 to the conveying belt, so that a certain spacing is set between the bottle caps 14 on the conveying device 2 and the spacing is set to be the same, which is convenient for subsequent detection.

[0034] The guide rail 41 includes a left guide plate 411, a right guide plate 412 and an upper limit guide bar 413. The left guide plate 411 and the right guide plate 412 are arranged on the conveying device 2, and a bottle cap conveying channel along the conveying direction is formed between the left guide plate 411 and the right guide plate 412. The upper limit guide bar 413 is arranged above the bottle cap conveying channel. The left guide plate 411 and the right guide plate 412 are used to guide and confine the bottle caps 14 in the conveying channel to prevent the bottle caps 14 from deviating from the path; the upper limit guide bar 413 is used to limit the rising height of the bottle caps 14 to ensure that the bottle caps 14 do not exceed a certain height, so as to ensure the stability and consistency of the arrangement of the bottle caps 14.

[0035] refer to Figure 3 and Figure 5 As shown, the cap body detection device 5 includes a first light source fixing plate 51 and a first annular light source 52 embedded in the first light source fixing plate 51. The first light source fixing plate 51 is fixed on the frame 1 on both sides through a first lifting structure 53, and the first light source fixing plate 51 has a plurality of first cameras 54 for cap body detection evenly arranged along the circumferential direction; the first annular light source 52 is located directly above the conveying device 2; the cap inner wall detection device 6 includes a second camera 61 for detecting the inner wall of the cap, the second camera 61 is arranged on the first light source fixing plate 51, and the lens of the second camera 61 is facing the middle hole area of ​​the first annular light source 52. In this embodiment, there are 4 first cameras 54 in total, and the 4 first cameras 54 are arranged at intervals of 90° along the circumferential direction of the first light source fixing plate 51; the lens of the first camera 54 faces the cap body of the bottle cap 14 on the conveying device 2, and takes four photos at the same time to detect the cap body as a whole to determine whether the cap body is a qualified product; the lens of the second camera 61 faces the inner wall of the cap, takes an image of the inner wall of the cap and performs detection. The first annular light source 52 simultaneously provides light for the first camera 54 and the second camera 61 to photograph the bottle cap 14 .

[0036] The cover inner bottom detection device 7 includes a third camera 71 for cover inner bottom detection and a second annular light source 72, the second annular light source 72 is embedded in a second light source fixing plate 73, one side of the second light source fixing plate 73 is fixed to the frame 1 through a second lifting structure 74, the third camera 71 is set on the second light source fixing plate 73, the second annular light source 72 is located directly above the conveying device 2, and the lens of the third camera 71 is directly facing the middle hole area of ​​the second annular light source 72. The position of the second light source fixing plate 73 can be adjusted by the second lifting structure 74, and then the third camera 71 and the second annular light source 72 can be adjusted synchronously; the second annular light source 72 provides sufficient light for the third camera 71 to shoot the cover inner bottom.

[0037] The cap top detection device 9 includes a fourth camera 91 for cap top detection and a third annular light source 92, the third annular light source 92 is embedded in a third light source fixing plate 93, one side of the third light source fixing plate 93 is fixed to the frame 1 through a third lifting structure 94, the fourth camera 91 is arranged on the third light source fixing plate 93, the third annular light source 92 is located directly below the reverse suction conveying device 3, and the lens of the third camera 71 is facing the middle hole area of ​​the second annular light source 72. The position of the third light source fixing plate 93 can be adjusted by the third lifting structure 94, and then the fourth camera 91 and a third annular light source 92 can be adjusted synchronously; the third annular light source 92 provides sufficient light for the fourth camera 91 to shoot the inner bottom of the cap. In this embodiment, the second camera 61, the third camera 71 and the fourth camera 91 are all provided with camera shields.

[0038] A photoelectric switch 12 for detecting that the bottle cap 14 has reached a preset position is provided on the conveying device 2 between the cap separation device 4 and the cap body detection device 5, and on the reverse suction conveying device 3 of the cap top detection device 9 close to the conveying device 2. When the photoelectric switch 12 detects that the bottle cap 14 has reached the preset position, the detection device starts to detect the corresponding position of the bottle cap. In this embodiment, the photoelectric switch 12 is a reflective photoelectric switch 12, and a photoelectric reflector for enhancing the detection effect of the reflective photoelectric switch 12 is also provided on the frame 1 on the opposite side of the reflective photoelectric switch 12.

[0039] The first rejection device 8 includes a first high-speed electromagnetic valve 81 and a first waste collection bucket 82 which are relatively arranged on both sides of the conveying device 2 along the conveying direction, and the second rejection device 10 includes a second high-speed electromagnetic valve 101 and a second waste collection bucket 102 which are relatively arranged on both sides of the reverse suction conveying device 3 along the conveying direction. When a bottle cap detected to be abnormal is conveyed to the front of the first high-speed electromagnetic valve 81 by the conveying device 2, the first high-speed electromagnetic valve 81 blows and pushes the bottle cap detected to be abnormal into the first waste collection bucket 82 for rejection. When a bottle cap detected to be abnormal is conveyed to the front of the second high-speed electromagnetic valve 101 by the reverse suction conveying device 3, the second high-speed electromagnetic valve 101 blows and pushes the bottle cap detected to be abnormal into the second waste collection bucket 102 for rejection.

[0040] The utility model adopts the structure of a double conveying device of a conveying device 2 and a reverse suction conveying device 3. After the bottle caps 14 are sorted by the cap separating device 4, they are successively conveyed to the cap body detection device 5, the cap inner wall detection device 6 and the cap inner bottom detection device 7 along the conveying direction of the conveying device 2, and the bottle caps 14 are adsorbed by the reverse suction conveyor belt 32 of the reverse suction conveying device 3, so that the bottle caps are reversely sucked and converted from the conveying device 2 to the reverse suction conveying device 3, and are conveyed to the cap top detection device 9, so that the cap body, the cap inner wall, the cap inner bottom and the cap top of the bottle cap 14 are fully detected, and the detection efficiency of the bottle cap detection machine is improved; at the same time, by setting a fine-tuning component 11, by adjusting the position of the fixed block 112 on the slide bar 113, the relative position of the conveying device 2 and the reverse suction conveying device 3 is finely adjusted, so that the parallelism error of the conveying device 2 and the reverse suction conveying device 3 above the conveying position 2 can be compensated, and the problem of a decrease in the success rate of the reverse suction conveying device adsorbing the bottle cap 14 due to the parallelism error is avoided, thereby further improving the detection efficiency of the bottle cap detection machine.

[0041] The above is a specific description of the preferred embodiments of the present invention, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A bottle cap inspection machine, characterized in that: It comprises a frame, a conveying device and a reverse suction conveying device arranged in the frame, a cap separating device, a cap body detecting device, a cap inner wall detecting device, a cap inner bottom detecting device and a first rejecting device for rejecting unqualified bottle caps detected by the cap body detecting device, the cap inner wall detecting device and the cap inner bottom detecting device are arranged in sequence on the frame above the conveying device along the conveying direction, and a cap top detecting device and a second rejecting device are arranged in sequence on the frame below the reverse suction conveying device; the second rejecting device is used to reject unqualified bottle caps detected by the cap top detecting device; The reverse suction conveying device is located above the conveying device, and one end of the reverse suction conveying device is connected to one end of the conveying device through a fine-tuning component; the fine-tuning component includes two bases respectively arranged on both sides of one end of the conveying device, and two fixed blocks arranged on both sides of one end of the reverse suction conveying device, each of the bases is provided with a sliding rod, the fixed block is slidably arranged on the sliding rod, and each of the sliding rods is provided with a locking block for fixing the position of the fixed block; The reverse suction conveying device includes a reverse suction conveying frame, a reverse suction conveying belt fixed on the reverse suction conveying frame and a negative pressure interface, a negative pressure fan arranged in the frame and a frequency converter for adjusting the frequency of the negative pressure fan, a plurality of negative pressure suction holes are arranged on the reverse suction conveying belt, and the negative pressure fan is connected to the negative pressure suction holes through the negative pressure interface.

2. A bottle cap inspection machine according to claim 1, characterized in that: A bottle cap recovery device for collecting fallen bottle caps is provided below the end of the conveying device close to one end of the reverse suction conveying device.

3. The bottle cap inspection machine according to claim 1, characterized in that: The capping device comprises a guide rail arranged on the conveying device, a driving mechanism is arranged above the guide rail, the driving mechanism is connected to two capping guide plates, and the capping guide plates are located on both sides of the guide rail; the driving mechanism drives the two capping guide plates to rotate and then pushes the bottle caps in the guide rail to move along the conveying direction.

4. The bottle cap inspection machine according to claim 3, characterized in that: The guide rail includes a left guide plate, a right guide plate and an upper limit guide bar. The left guide plate and the right guide plate are arranged on the conveying device, and a bottle cap conveying channel along the conveying direction is formed between the left guide plate and the right guide plate. The upper limit guide bar is arranged above the bottle cap conveying channel.

5. The bottle cap inspection machine according to claim 1, characterized in that: The cap body detection device comprises a first light source fixing plate and a first annular light source embedded in the first light source fixing plate, the first light source fixing plate is fixed on a frame at both sides by a first lifting structure, and the first light source fixing plate has a plurality of first cameras for cap body detection evenly arranged along a circumferential direction; the first annular light source is located directly above the conveying device; the cap inner wall detection device comprises a second camera for detecting the cap inner wall, the second camera is arranged on the first light source fixing plate, and the lens of the second camera is directly facing the center hole area of ​​the first annular light source.

6. A bottle cap inspection machine according to claim 1, wherein the cap inner bottom inspection device comprises a third camera for cap inner bottom inspection and a second annular light source, the second annular light source is embedded in a second light source fixing plate, one side of the second light source fixing plate is fixed to the frame by a second lifting structure, the third camera is arranged on the second light source fixing plate, the second annular light source is located directly above the conveying device, and the lens of the third camera is facing the center hole area of ​​the second annular light source.

7. The bottle cap inspection machine according to claim 1, characterized in that: The top cover detection device includes a fourth camera for top cover detection and a third annular light source, the third annular light source is embedded in a third light source fixing plate, one side of the third light source fixing plate is fixed to the frame through a third lifting structure, the fourth camera is arranged on the third light source fixing plate, the third annular light source is located directly below the inverted suction conveying device, and the lens of the fourth camera is facing the middle hole area of ​​the third annular light source.

8. The bottle cap inspection machine according to claim 1, characterized in that: A photoelectric switch for detecting that the bottle cap reaches a preset position is provided on the conveying device between the cap separating device and the cap body detecting device and on the reverse suction conveying device of the cap top detecting device close to the conveying device.

9. The bottle cap inspection machine according to claim 1, characterized in that: The first rejection device includes a first high-speed solenoid valve and a first waste collecting bucket relatively arranged on both sides of the conveying device along the conveying direction, and the second rejection device includes a second high-speed solenoid valve and a second waste collecting bucket relatively arranged on both sides of the reverse suction conveying device along the conveying direction.

Images