A device for detecting defects in the appearance of pills

Abstract

This utility model discloses a device for detecting defects in the appearance of tablets, including a frame and three support frames. The first support frame is equipped with a first driving device and a first conveying tray, which rotates and arranges the tablets into a circumferential arrangement. The second support frame has a second driving device and a second conveying tray, which rotates and picks up the tablets from the first conveying tray. A first visual inspection device is provided on one side of the second support frame to detect defects on the front of the tablets. The third support frame has a third driving device and a third conveying tray, which rotates and picks up the tablets from the second conveying tray to flip them over. A second visual inspection device is provided on one side of the third support frame to detect defects on the back of the tablets. The movable plate of the first support frame can be moved up and down along the guide rod. The inclined plate of the second support frame can be adjusted to change its tilt angle. The installation position of the third support frame can be adjusted horizontally. This device can comprehensively and accurately detect defects in the appearance of tablets, adapt to the detection needs of tablets of different sizes, is easy to operate, and improves detection efficiency.

Description

Technical Field

[0001] This utility model relates to the field of tablet testing technology, specifically to a tablet appearance defect detection device. Background Technology

[0002] Currently, common tablet appearance defect detection devices typically employ multiple conveyor trays or rollers working in tandem to transport and inspect tablets. In these devices, the spacing between the conveyor trays is a crucial factor affecting detection accuracy and production efficiency. Appropriate tray spacing ensures smooth tablet transfer between trays while maintaining sufficient adhesion for accurate appearance defect detection.

[0003] However, in traditional devices, the tray support frame is fixed in a predetermined position, resulting in a fixed interval between the conveyor trays. But in actual production, the tablets to be tested vary in size, and different sizes of tablets differ significantly in volume. When testing tablets of different sizes, the fixed tray interval cannot meet the actual requirements.

[0004] If the spacing between the conveyor trays is too large, the adhesion for smaller tablets will be insufficient, making it difficult for the tablets to transfer smoothly from one tray to the next. This affects the normal tablet transport and testing process, reducing production efficiency. Conversely, if the spacing between the conveyor trays is too small, larger tablets may not be able to pass through the gap between two trays smoothly, easily causing them to get stuck or even fall off. This can damage the tablets and potentially affect the normal operation of the testing device, increasing the equipment failure rate. Utility Model Content

[0005] The purpose of this invention is to address the problems existing in the prior art by providing a tablet appearance defect detection device that can comprehensively and accurately detect tablet appearance defects, thereby improving the comprehensiveness and reliability of the detection; it can adapt to the detection needs of tablets of different sizes, does not require disassembly and reinstallation of the support frame, is easy to operate, and greatly improves the detection efficiency.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A device for detecting defects in the appearance of tablets includes a frame, which has a first support frame, a second support frame, and a third support frame. The first support frame has a first driving device and a first feeding tray. The first feeding tray rotates under the drive of the first driving device to arrange stacked tablets into an arrangement around its periphery. The second support frame has a second driving device and a second feeding tray. The second feeding tray rotates under the drive of the second driving device and sequentially picks up tablets from the first feeding tray through its peripheral slits. The third support frame has a third driving device and a third feeding tray. The third feeding tray rotates under the drive of the third driving device and sequentially picks up tablets from the third feeding tray through its peripheral slits, causing the tablets to flip over. A first visual inspection device is provided on one side of the second feeding tray for detecting defects on the front of the tablets. A second visual inspection device is provided on one side of the third feeding tray for detecting defects on the back of the tablets. The first support frame includes a fixed plate, a movable plate, and a lifting drive device. The fixed plate is fixed to the machine frame. The first drive device and the first material conveying tray are both located on the movable plate. The fixed plate has several vertical guide rods. The movable plate moves up and down along the guide rods under the drive of the lifting drive device. The second support frame includes a base plate and an inclined plate. The base plate is fixed to the machine frame. The base plate is connected to two first hinge seats and two columns. The columns can be adjusted relative to the base plate. The two columns are each provided with a second hinge seat that can move up and down. The second drive device and the second material conveying tray are both located on the inclined plate. The lower end of the inclined plate has a lower fixed shaft. The two ends of the lower fixed shaft are respectively connected to the two first hinge seats. The upper end of the inclined plate has an upper fixed shaft. The two ends of the upper fixed shaft are respectively connected to the two second hinge seats. The third support frame can be horizontally adjusted on the machine frame.

[0008] Furthermore, the second hinge seat is provided with a horizontal retaining ring and a vertical retaining ring, one end of the upper fixed shaft is inserted into the horizontal retaining ring, and the column is inserted into the vertical retaining ring.

[0009] Furthermore, the column is connected to the base plate via a mounting plate. The mounting plate includes mounting holes and a waist-shaped mounting groove. The lower end of the column is inserted into the mounting hole. The base plate has several screw holes. Several bolts pass through the waist-shaped mounting groove and are connected to the screw holes to fix the mounting plate to the base plate.

[0010] Furthermore, the first visual inspection device includes a mounting bracket, an adjusting slide, a ring light source, and an industrial camera; the mounting bracket is fixed to the inclined plate, the ring light source is connected to the mounting bracket, and one end face of the ring light source faces the side of the second conveying tray; the industrial camera is connected to the mounting bracket through the adjusting slide, the lens of the industrial camera faces the side slit of the second conveying tray, and the adjusting slide is used to adjust the radial distance between the industrial camera and the side of the second conveying tray.

[0011] Furthermore, the lifting drive device is a hand-cranked screw jack.

[0012] Furthermore, both the second and third conveying trays are provided with negative pressure chambers inside, and both the bottom of the second and third conveying trays are provided with pipes connected to the negative pressure chambers.

[0013] Furthermore, a defective tablet box and a dropping box are provided on one side of the third conveying tray, and an air gun rejection mechanism corresponding to the position of the defective tablet box is provided on the lower side of the third conveying tray for blowing defective tablets into the defective tablet box; a vacuum breaking zone corresponding to the position of the dropping box is provided inside the third conveying tray for allowing qualified tablets to fall into the dropping box.

[0014] Furthermore, the first drive device, the second drive device, and the third drive device are all motors.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] Through the coordinated operation of the first, second, and third feeding trays, the tablets are automatically flipped during the feeding process. The first and second vision inspection devices are used to detect defects on the front and back of the tablets, respectively, thereby enabling comprehensive and accurate detection of appearance defects of the tablets and improving the comprehensiveness and reliability of the inspection.

[0017] A lifting drive device is installed on the first support frame, which can flexibly adjust the distance between the first and second feeding trays. Simultaneously, by adjusting the vertical mounting position of the second support frame and the horizontal mounting position of the third support frame, the distance between the second and third feeding trays can also be flexibly adjusted. This allows the device to adapt to the testing requirements of tablets of different sizes without the need to disassemble and reinstall the support frame, making operation convenient and greatly improving testing efficiency.

[0018] By precisely adjusting the spacing between the conveyor trays, when inspecting larger tablets, the spacing can be increased to prevent tablets from getting stuck between the two trays due to insufficient spacing, ensuring smooth transfer of the tablets. When inspecting smaller tablets, the spacing can be decreased to prevent the suction force on the tablets from weakening due to excessive spacing, allowing the tablets to be effectively transferred, thus ensuring the accuracy and stability of tablet appearance defect detection. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of a tablet appearance defect detection device according to one embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the structure of the first support frame, the first material conveying tray, and the first driving device in one embodiment of this application;

[0022] Figure 3 This is a schematic diagram of the structure of the second support frame, the second conveying tray, and the second driving device in one embodiment of this application;

[0023] Figure 4 This is a schematic diagram of the structure of the second hinge seat in one embodiment of this application;

[0024] Figure 5 This is a schematic diagram of the mounting plate structure in one embodiment of this application;

[0025] Figure 6 This is a schematic diagram of the structure of the third support frame, the third conveying tray, and the third driving device in one embodiment of this application;

[0026] Figure 7 This is a schematic diagram of the structure of the first visual detection device in one embodiment of this application;

[0027] Figure 8 This is a schematic diagram of the lifting drive device in one embodiment of this application;

[0028] In the diagram: 1. Frame; 2. First support frame; 21. First drive unit; 22. First conveying tray; 23. Fixed plate; 24. Movable plate; 25. Lifting drive unit; 26. Guide rod; 3. Second support frame; 31. Second drive unit; 32. Second conveying tray; 33. Base plate; 34. Inclined plate; 35. First hinge seat; 36. Column; 361. Mounting plate; 362. Mounting hole; 363. Waist-shaped mounting groove; 37. Second hinge seat; 371. Horizontal clamp; 372. Vertical clamp; 38. Lower fixed shaft; 39. Upper fixed shaft; 4. Third support frame; 41. Third drive unit; 42. Third conveying tray; 43. Defective piece box; 44. Drop box; 5. First vision inspection device; 51. Mounting bracket; 52. Adjusting slide; 53. Ring light source; 54. Industrial camera; 6. Second vision inspection device. Detailed Implementation

[0029] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0030] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0031] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0032] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] In traditional equipment, the tray support frame is fixedly installed in a predetermined position, resulting in a fixed interval between the conveyor trays. However, in actual production, the tablets to be tested vary in size, and different sizes of tablets have significant volume differences. When testing tablets of different sizes, the fixed interval between the conveyor trays cannot meet the actual needs.

[0034] If the spacing between the conveyor trays is too large, the adhesion for smaller tablets will be insufficient, making it difficult for the tablets to transfer smoothly from one tray to the next. This affects the normal tablet transport and testing process, reducing production efficiency. Conversely, if the spacing between the conveyor trays is too small, larger tablets may not be able to pass through the gap between two trays smoothly, easily causing them to get stuck or even fall off. This can damage the tablets and potentially affect the normal operation of the testing device, increasing the equipment failure rate.

[0035] Regarding the above technical solutions, such as Figure 1 As shown, this embodiment provides a tablet appearance defect detection device, including a frame 1. The frame 1 is provided with a first support frame 2, a second support frame 3, and a third support frame 4. The first support frame 2 is provided with a first driving device 21 and a first conveying tray 22. The first conveying tray 22 rotates under the drive of the first driving device 21 to arrange stacked tablets into an arrangement around its peripheral edge. The second support frame 3 is provided with a second driving device 31 and a second conveying tray 32. The second conveying tray 32 rotates under the drive of the second driving device 31 and sequentially picks up tablets from the first conveying tray 22 through its peripheral slits. The third support frame 4 is provided with a third driving device 41 and a third conveying tray 42. The third conveying tray 42 rotates under the drive of the third driving device 41 and sequentially picks up tablets from the third conveying tray 42 through its peripheral slits, causing the tablets to flip over. A first visual inspection device 5 is provided on one side of the second conveying tray 32 for detecting defects on the front of the tablets. A second visual inspection device 6 is provided on one side of the third conveying tray 42 for detecting defects on the back of the tablets. Figure 2As shown, the first support frame 2 includes a fixed plate 23, a movable plate 24, and a lifting drive device 25. The fixed plate 23 is fixed to the frame 1. The first drive device 21 and the first conveying tray 22 are both located on the movable plate 24. The fixed plate 23 is provided with several vertical guide rods 26. The movable plate 24 moves up and down along the guide rods 26 under the drive of the lifting drive device 25. Figure 3 As shown, the second support frame 3 includes a base plate 33 and an inclined plate 34. The base plate 33 is fixedly mounted on the frame 1. The base plate 33 is connected to two first hinge seats 35 and two columns 36. The columns 36 can be adjusted in installation position relative to the base plate 33. The two columns 36 are respectively provided with second hinge seats 37 that can move up and down. The second drive device 31 and the second conveying plate 32 are both mounted on the inclined plate 34. The lower end of the inclined plate 34 is provided with a lower fixed shaft 38. The two ends of the lower fixed shaft 38 are respectively connected to the two first hinge seats 35. The upper end of the inclined plate 34 is provided with an upper fixed shaft 39. The two ends of the upper fixed shaft 39 are respectively connected to the two second hinge seats 37. The third support frame 4 can be horizontally adjusted in installation position on the frame 1.

[0036] During operation, tablets are fed in piles onto the first feeding tray 22, which rotates under the drive of the first driving device 21. The first feeding tray 22 is similar to the feeding device disclosed in CN219818430U. The tablets first move around the inner wall of the feeding platform under the drive of the feeding tray for initial rapid feeding, and then move along the spiral feeding channel under the drive of the feeding platform. Finally, they are arranged in a ring around the first feeding tray 22, and the tablets are all lying flat under the action of gravity, which is convenient for the second feeding tray 32 to pick them up.

[0037] The second feeding tray 32 is inclined, with its lower end close to the side of the first feeding tray 22, and rotates in the same direction as the first feeding tray 22. When the tablets move sequentially between the second feeding tray 32 and the first feeding tray 22, the second feeding tray 32 uses the suction force of its side slits to pick up the tablets one by one, so that the tablets are attached to the second feeding tray 32, thereby transferring the tablets around the second feeding tray 32, and making the front of the tablets face outward, so that the first visual inspection device 5 can perform defect detection on the front of the tablets.

[0038] The third feeding tray 42 is horizontally positioned, with one side close to the side of the second feeding tray 32, and rotates in the same direction as the second feeding tray 32. When the tablets move sequentially between the third feeding tray 42 and the second feeding tray 32, a vacuum breaking zone is provided on the second feeding tray 32, or the suction force of the third feeding tray 42 is made greater than that of the second feeding tray 32. This allows the third feeding tray 42 to pick up the tablets one by one through the suction force of its side slits, causing the tablets to adhere to the third feeding tray 42. This transfers the tablets to a position surrounding the third feeding tray 42, with the reverse side of the tablets facing outwards, so that the second visual inspection device 6 can perform defect detection on the back of the tablets.

[0039] When it is necessary to detect larger tablets, the lifting drive device 25 controls the movable plate 24 to descend, causing the first conveying tray 22 to descend accordingly. This increases the distance between the first conveying tray 22 and the second conveying tray 32, preventing tablets from getting stuck between the two trays. When it is necessary to detect smaller tablets, the lifting drive device 25 controls the movable plate 24 to rise, causing the first conveying tray 22 to rise accordingly. This decreases the distance between the first conveying tray 22 and the second conveying tray 32, preventing a large distance between the two trays from weakening the suction force on the tablets and making it difficult to effectively transfer them.

[0040] When it is necessary to test larger tablets, adjust the installation position of the two columns 36 of the second support frame 3 to reduce the tilt angle of the inclined plate 34. At the same time, adjust the horizontal installation position of the third support frame 4 to move away from the second conveying tray 32, thereby increasing the gap between the second conveying tray 32 and the third conveying tray 42. When it is necessary to test smaller tablets, adjust the installation position of the two columns 36 of the second support frame 3 to increase the tilt angle of the inclined plate 34. At the same time, adjust the horizontal installation position of the third support frame 4 to move closer to the second conveying tray 32, thereby reducing the gap between the second conveying tray 32 and the third conveying tray 42.

[0041] In the above embodiments, through the coordinated work of the first conveying tray 22, the second conveying tray 32 and the third conveying tray 42, the tablets are transferred sequentially, with the front side facing outward on the second conveying tray 32 and the back side facing outward on the third conveying tray 42. The first visual inspection device 5 and the second visual inspection device 6 are used to detect defects on the front and back sides of the tablets, respectively, thereby achieving comprehensive detection of appearance defects of the tablets and improving the comprehensiveness and reliability of the detection.

[0042] Because the specifications and volumes of the tablets being tested vary each time, the spacing between the conveyor trays requires different adjustments. This device, by incorporating a lifting drive device 25 on the first support frame 2, allows for flexible adjustment of the distance between the first conveyor tray 22 and the second conveyor tray 32. Simultaneously, by adjusting the installation position of the upright column 36 of the second support frame 3 and the horizontal installation position of the third support frame 4, the distance between the second conveyor tray 32 and the third conveyor tray 42 can be flexibly adjusted. This allows it to adapt to the testing needs of tablets of different sizes, eliminating the need for disassembling and reinstalling the support frame as required by existing technologies. This simplifies operation and significantly improves testing efficiency.

[0043] Appropriate tray spacing is crucial for the smooth transfer and accurate inspection of tablets. When inspecting larger tablets, increasing the spacing between the trays prevents the tablets from getting stuck between the two trays due to insufficient spacing, ensuring smooth transfer. When inspecting smaller tablets, decreasing the spacing between the trays prevents the suction force from weakening due to excessive spacing, allowing the tablets to be effectively transferred, thus ensuring the accuracy and stability of tablet appearance defect detection.

[0044] like Figure 4 As shown, in some embodiments, the second hinge seat 37 is provided with a horizontal retaining ring 371 and a vertical retaining ring 372, one end of the upper fixed shaft 39 is inserted into the horizontal retaining ring 371, and the column 36 is inserted into the vertical retaining ring 372.

[0045] During the assembly and operation of the device, one end of the upper fixed shaft 39 is inserted into the horizontal clamping ring 371, enabling the upper fixed shaft 39 to achieve a stable connection with the second hinge seat 37, and then connect to the upper end of the inclined plate 34, providing support for the fixation and movement of the upper end of the inclined plate 34. At the same time, the column 36 is inserted into the vertical clamping ring 372. Since the installation position of the column 36 can be adjusted relative to the base plate 33, when the installation position of the column 36 is adjusted, the second hinge seat 37 will move up and down with the horizontal movement of the column 36, thereby driving the upper end of the inclined plate 34 to move up and down, ultimately achieving the adjustment of the tilt angle of the inclined plate 34 to meet the requirements of appropriate spacing between the second conveying tray 32 and the third conveying tray 42 when detecting tablets of different specifications.

[0046] like Figure 5 As shown, in some embodiments, the column 36 is connected to the base plate 33 via a mounting plate 361. The mounting plate 361 includes a mounting hole 362 and a waist-shaped mounting groove 363. The lower end of the column 36 is inserted into the mounting hole 362. The base plate 33 is provided with a plurality of screw holes. A plurality of bolts are passed through the waist-shaped mounting groove 363 and connected to the screw holes to fix the mounting plate 361 to the base plate 33.

[0047] The base plate 33 has several screw holes. When it is necessary to fix the mounting plate 361 to the base plate 33, several bolts are passed through the waist-shaped mounting groove 363 and connected to the screw holes on the base plate 33. Since the waist-shaped mounting groove 363 has a certain length range, during the installation process, by adjusting the position of the bolts in the waist-shaped mounting groove 363, the installation position of the mounting plate 361 relative to the base plate 33 can be changed, thereby causing the position of the column 36 to change, realizing flexible adjustment of the installation position of the column 36, and ultimately meeting the requirements of appropriate spacing between the second conveying tray 32 and the third conveying tray 42 when testing tablets of different specifications.

[0048] like Figure 7As shown, in some embodiments, the first visual inspection device 5 includes a mounting bracket 51, an adjusting slide 52, a ring light source 53, and an industrial camera 54; the mounting bracket 51 is fixed to the inclined plate 34, the ring light source 53 is connected to the mounting bracket 51, and one end face of the ring light source 53 faces the side of the second conveying tray 32; the industrial camera 54 is connected to the mounting bracket 51 through the adjusting slide 52, the lens of the industrial camera 54 faces the side slit of the second conveying tray 32, and the adjusting slide 52 is used to adjust the radial distance between the industrial camera 54 and the side of the second conveying tray 32.

[0049] When a tablet is adsorbed onto the second feeding tray 32 and surrounds it with its front side facing outwards, a ring light source 53 is positioned on one side of the second feeding tray 32 to provide uniform and sufficient illumination to the tablets within its range. An industrial camera 54 is connected to the mounting bracket 51 via an adjusting slide 52, with its lens facing the side slit of the second feeding tray 32. When the tablet moves to the position of the ring light source 53, the industrial camera 54 acquires an image of the tablet's front side. The adjusting slide 52 can adjust the radial distance between the industrial camera 54 and the side of the second feeding tray 32 according to actual needs, thereby changing the focal length and field of view of the industrial camera 54 to ensure accurate and clear acquisition of image information of the tablet's front side.

[0050] like Figure 8 As shown, in some embodiments, the lifting drive device 25 is a hand-cranked screw jack.

[0051] The hand-cranked screw jack is a mature and existing device. Its internal structure mainly consists of a screw, nut, transmission components, and a hand-cranked operating lever. When the operator manually cranks the operating lever, the rotational motion is transmitted to the screw through the transmission components, and the screw begins to rotate. When the screw rotates in one direction, the nut drives the connected top block to rise; when the screw rotates in the opposite direction, the nut drives the top block to fall, thus realizing the manual control of the lifting and lowering of the movable plate 24.

[0052] In some embodiments, both the second conveying tray 32 and the third conveying tray 42 are provided with a negative pressure chamber inside, and both the bottom of the second conveying tray 32 and the third conveying tray 42 are provided with a pipe connected to the negative pressure chamber.

[0053] When the device is running, the external negative pressure equipment is connected to the pipe and the connecting pipe to generate a negative pressure environment in the negative pressure chamber. Under the action of negative pressure, the external atmospheric pressure will press the tablet tightly against the narrow slit on the side of the conveyor tray, so that the tablet can move stably with the rotation of the conveyor tray, which is convenient for detection.

[0054] like Figure 6As shown, in some embodiments, a defective tablet box 43 and a dropping box 44 are provided on one side of the third conveying tray 42, and an air gun rejection mechanism corresponding to the position of the defective tablet box 43 is provided on the lower side of the third conveying tray 42 for blowing defective tablets into the defective tablet box 43; a vacuum breaking zone corresponding to the position of the dropping box 44 is provided inside the third conveying tray 42 for causing qualified tablets to fall into the dropping box 44.

[0055] After passing through the previous inspection stages, the tablets arrive at the defective tablet box 43 and drop box 44 on the third conveyor tray 42. When the inspection system determines that a tablet is defective, it sends a signal to the air gun rejection mechanism. Upon receiving the signal, the air gun rejection mechanism activates, generating a high-pressure airflow. Since the defective tablet box 43 corresponds to the air gun rejection mechanism, the high-pressure airflow blows the defective tablets on the third conveyor tray 42 away from the side of the conveyor tray, causing them to fall into the defective tablet box 43, thus removing the defective tablets.

[0056] The remaining qualified tablets move to the vacuum breaking zone, which disrupts the negative pressure environment in the negative pressure chamber of the third conveyor tray 42. The qualified tablets that were originally held in place by the negative pressure on the side of the third conveyor tray 42 will fall into the drop box 44 under their own gravity due to the loss of negative pressure adsorption, thus completing the collection of qualified tablets.

[0057] In some embodiments, the first drive device 21, the second drive device 31, and the third drive device 41 are all motors.

[0058] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A device for detecting defects in the appearance of a pill, comprising a frame (1), wherein the frame (1) is provided with a first support frame (2), a second support frame (3) and a third support frame (4). The first support frame (2) is provided with a first driving device (21) and a first conveying tray (22); the first conveying tray (22) rotates under the drive of the first driving device (21) and is used to arrange the stacked tablets into a pattern surrounding its periphery. The second support frame (3) is provided with a second driving device (31) and a second conveying tray (32); the second conveying tray (32) rotates under the drive of the second driving device (31) and sequentially adsorbs the tablets of the first conveying tray (22) through its peripheral slits; The third support frame (4) is provided with a third driving device (41) and a third conveying tray (42); the third conveying tray (42) rotates under the drive of the third driving device (41) and sequentially adsorbs the tablets of the third conveying tray (42) through its peripheral slits, so that the tablets are flipped over; The second feeding tray (32) is provided with a first visual inspection device (5) on one side for detecting defects on the front of the tablet; the third feeding tray (42) is provided with a second visual inspection device (6) on one side for detecting defects on the back of the tablet. characterized in that The first support frame (2) includes a fixed plate (23), a movable plate (24), and a lifting drive device (25). The fixed plate (23) is fixed to the frame (1). The first drive device (21) and the first material conveying tray (22) are both located on the movable plate (24). The fixed plate (23) is provided with a plurality of vertical guide rods (26). The movable plate (24) moves up and down along the guide rods (26) under the drive of the lifting drive device (25). The second support frame (3) includes a base plate (33) and an inclined plate (34). The base plate (33) is fixedly mounted on the frame (1). The base plate (33) is connected to two first hinge seats (35) and two columns (36). The columns (36) can be adjusted relative to the base plate (33) in their installation position. The two columns (36) are respectively provided with second hinge seats (37) that can move up and down. The second driving device (31) and the second conveying tray (32) are both located on the inclined plate (34). The lower end of the inclined plate (34) is provided with a lower fixed shaft (38), and the two ends of the lower fixed shaft (38) are respectively connected to the two first hinge seats (35). The upper end of the inclined plate (34) is provided with an upper fixed shaft (39), and the two ends of the upper fixed shaft (39) are respectively connected to the two second hinge seats (37). The third support frame (4) can be horizontally adjusted on the frame (1) to adjust its installation position.

2. The tablet appearance defect detection apparatus according to claim 1, wherein The second hinge seat (37) is provided with a horizontal retaining ring (371) and a vertical retaining ring (372). One end of the upper fixed shaft (39) is inserted into the horizontal retaining ring (371), and the column (36) is inserted into the vertical retaining ring (372).

3. The tablet appearance defect detection apparatus according to claim 1, wherein The column (36) is connected to the base plate (33) via a mounting plate (361). The mounting plate (361) includes a mounting hole (362) and a waist-shaped mounting groove (363). The lower end of the column (36) is inserted into the mounting hole (362). The base plate (33) has several screw holes. Several bolts pass through the waist-shaped mounting groove (363) and connect to the screw holes, so that the mounting plate (361) is fixed to the base plate (33).

4. The tablet appearance defect detection apparatus according to claim 1, wherein The first visual inspection device (5) includes a mounting bracket (51), an adjusting slide (52), a ring light source (53), and an industrial camera (54); the mounting bracket (51) is fixed to the inclined plate (34), the ring light source (53) is connected to the mounting bracket (51), and one side end face of the ring light source (53) faces the side of the second conveying tray (32); the industrial camera (54) is connected to the mounting bracket (51) through the adjusting slide (52), the lens of the industrial camera (54) faces the side slit of the second conveying tray (32), and the adjusting slide (52) is used to adjust the radial distance between the industrial camera (54) and the side of the second conveying tray (32).

5. The tablet appearance defect detection apparatus according to claim 1, wherein The lifting drive device (25) is a hand-cranked screw jack.

6. The tablet appearance defect detection apparatus according to claim 1, wherein The second conveying tray (32) and the third conveying tray (42) are both provided with negative pressure chambers inside, and the bottom of the second conveying tray (32) and the third conveying tray (42) are both provided with pipes connected to the negative pressure chambers.

7. The tablet appearance defect detection apparatus according to claim 1, wherein The third conveying tray (42) has a defective tablet box (43) and a dropping box (44) on one side. The lower side of the third conveying tray (42) is provided with an air gun rejection mechanism corresponding to the position of the defective tablet box (43), which is used to blow the defective tablets into the defective tablet box (43). The interior of the third conveying tray (42) is provided with a vacuum breaking zone corresponding to the position of the dropping box (44), which is used to make qualified tablets fall into the dropping box (44).

8. The tablet appearance defect detection apparatus according to claim 1, wherein The first drive device (21), the second drive device (31) and the third drive device (41) are all motors.

Images