Automatic encapsulation mechanism for granular medicine

Abstract

This invention provides an automated granule packaging mechanism that solves the problem of existing granule packaging mechanisms lacking a precise alignment structure at the cap conveying end, resulting in caps failing to stably and accurately align with the bottle body center. This automated granule packaging mechanism includes a bottle conveyor belt, a bottle sorting device, a medication filling device, a cap sorting device, and a capping device arranged sequentially along the conveyor belt. The bottle sorting device arranges bottles orderly onto the conveyor belt. The medication filling device fills the bottles with granules. The cap sorting device is connected to a cap conveying guide trough located above the conveyor belt. The end of the cap conveying guide trough has an adjustable positioning structure for positioning the caps, allowing only one cap to pass at a time. The capping device tightens the cap onto the bottle. The adjustable positioning structure at the end of the cap conveying guide trough enables precise single-cap positioning and orderly release, ensuring the caps fit precisely with the bottle body in the correct posture.

Description

Technical Field

[0001] This invention belongs to the field of pharmaceutical packaging technology and relates to an automatic packaging mechanism for granular drugs. Background Technology

[0002] Granular drug packaging is a common production process in the pharmaceutical industry. Its automated production process mainly includes bottle handling, bottle conveying, drug filling, cap handling, cap conveying, and capping. With the continuous improvement of production efficiency requirements, integrated packaging equipment has emerged that can automatically complete bottle handling and conveying, automatic drug filling, cap conveying, and capping. Although it can realize bottle handling and bottle conveying, the cap conveying end lacks a precise alignment structure. The cap cannot be stably and accurately aligned with the center of the bottle, often resulting in cap tilting, incomplete cap placement, and misaligned capping. This leads to poor sealing and poor airtightness, affecting the storage quality of granular drugs and failing to meet the requirements of drug production.

[0003] In the bottle cap sorting and conveying process, traditional lifting-type bottle cap sorting machines have the following problems: when the reverse bottle cap is close to the forward bottle cap on both sides, the forward bottle cap will block the reverse bottle cap, causing the reverse bottle cap to be unable to fall smoothly under its own weight; at the same time, the reverse bottle cap will collide with the forward bottle cap that is already in the correct position below during the fall, which can easily cause the forward bottle cap to fall back into the hopper accidentally, thereby affecting the overall sorting and conveying efficiency of the conveyor belt. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an automated packaging mechanism for granular medicines that can accurately seal the bottle cap to the bottle body.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] An automatic granule packaging mechanism includes a bottle conveyor belt, a bottle sorting device, a filling device, a cap sorting device, and a capping device arranged sequentially along the bottle conveyor belt. The bottle sorting device is used to arrange the bottles in an orderly manner on the bottle conveyor belt. The filling device is used to fill the bottles with granules. The cap sorting device is connected to a cap conveying guide groove located above the bottle conveyor belt. The end of the cap conveying guide groove is provided with an adjustable positioning structure for positioning the caps. The adjustable positioning structure allows only one cap to pass through at a time. The capping device is used to tighten the caps onto the bottle.

[0007] The bottle unscrambling device can adopt the bottle unscrambling structure described in application publication number CN117383217A, or it can use a bottle unscrambling device that is available on the market, as long as it can arrange the medicines orderly onto the bottle conveyor belt. The filling device transports granular medicines and can adopt a commercially available structure. It is connected to a funnel, with the bottom of the funnel directly facing the bottle opening on the bottle body on the bottle conveyor belt. A rated number of granules enter the bottle body through the funnel. The bottle cap unscrambling device adopts a lifting cap unscrambling structure. The bottle caps, positioned by an adjustable positioning structure, are tilted downwards along the conveying direction of the bottle body conveyor belt, and are located directly above the bottle body being transported by the bottle body conveyor belt. At this time, the lowest height of the bottle cap opening is lower than the height of the bottle body on the bottle body conveyor belt, and the highest height of the bottle cap opening is higher than the height of the bottle body on the bottle body conveyor belt. When the bottle body, conveyed by the bottle body conveyor belt, collides with the bottle cap positioned by the adjustable positioning structure, the positioning structure disengages from the cap, and the cap moves along with the bottle body into the capping device, where it is screwed on tightly. As soon as one bottle cap disengages from the adjustable positioning structure, the next bottle cap is positioned by it.

[0008] In the above-mentioned automatic granule packaging mechanism, the bottle cap conveying guide is located directly above the bottle body conveyor belt and extends downward at an incline along the conveying direction of the bottle body conveyor belt. The adjustable positioning structure includes support plates fixed on both sides of the bottle cap conveying guide, a positioning shaft disposed between the two support plates, and a limiting member rotatably disposed on the positioning shaft. The positioning shaft extends horizontally along the conveying direction perpendicular to the bottle cap conveying guide. The lower end of the limiting member has a first blocking part that is further inclined downward relative to the limiting member. The bottle cap that moves to the end of the bottle cap conveying guide is blocked by the first blocking part in its initial state. The upper end of the limiting member has a second blocking part. When the first blocking part is in its initial state, the second blocking part disengages from blocking the next bottle cap. When the limiting member rotates, the second blocking part gradually extends into the lower side of the next bottle cap to block the next bottle cap.

[0009] Although the second cap is directly attached to the first cap, the cap is round, and there is space between the two caps on both sides to facilitate the insertion of the second blocking part. There can be two second blocking parts, corresponding to these two spaces respectively.

[0010] In its initial state, the first blocking part blocks the bottle caps conveyed by the bottle cap conveying guide, keeping them at the end of the guide. At this time, half of the bottle cap is supported by the guide, and the second blocking part does not extend into the space between two adjacent bottle caps. As the bottle body moves forward, it pushes the bottle cap forward. Under the pressure of the bottle cap, the first blocking part gradually swings upward, eventually releasing itself from the blockage. Simultaneously, the second blocking part gradually extends into the space between two adjacent bottle caps, preventing the next bottle cap from moving forward.

[0011] The limiting member is set such that the weight of the front part is greater than the weight of the rear part. When the first bottle cap completely passes the first blocking part under the action of the bottle body, the limiting member returns to its initial state under its own gravity. The second blocking part pushes away the obstruction of the second bottle cap, and the second bottle cap moves forward under its own gravity until it is blocked by the first blocking part.

[0012] In the above-mentioned automatic granule packaging mechanism, the support plate is provided with a limiting protrusion located below the limiting member. The limiting member can abut against the limiting protrusion under its own gravity. When the limiting member abuts against the limiting protrusion, the limiting member is in its initial state.

[0013] In the above-mentioned automatic packaging mechanism for granular medicine, a torsion spring is provided between the limiting member and the support plate, and the limiting member can abut against the limiting protrusion under the elastic force of the torsion spring.

[0014] The torsion spring prevents the subsequent bottle cap from having too much inertia and breaking through the first barrier. With the torsion spring installed, the force exerted by the bottle body on the bottle cap will increase accordingly, so the bottle conveyor belt located below must clamp and transport the bottle body.

[0015] In the aforementioned automatic granule packaging mechanism, the bottle cap feeding device includes a hopper for placing bottle caps, an inclined annular conveyor belt with its lower end extending into the hopper, and a cap dispensing hopper connected to the annular conveyor belt. The bottle cap conveying guide groove is connected to the cap dispensing hopper. The outer surface of the annular conveyor belt is provided with several evenly distributed transverse support plates. The distance from the side of the transverse support plate away from the annular conveyor belt to the annular conveyor belt is greater than the distance from the center of gravity of the bottle cap facing outward to the annular conveyor belt, and less than the distance from the center of gravity of the bottle cap facing outward to the annular conveyor belt. A first baffle and a second baffle are provided on the front side of the transverse support plate located in front of the annular conveyor belt. The distances from the first baffle and the second baffle to the annular conveyor belt are both less than the axial dimension of the bottle cap. The first baffle extends obliquely upward and partially covers the transverse support plate, and the second baffle extends obliquely upward and completely covers the transverse support plate. The cap dispensing hopper is located at the upper end of the second baffle.

[0016] As the front of the circular conveyor belt moves upward, the transverse support plate pulls the bottle caps upward. Some reversed bottle caps fall smoothly under their own weight. Those that do not fall smoothly under their own weight continue to rise. When they reach the first baffle, the first baffle pushes the forward and reverse bottle caps on the corresponding transverse support plate away from the first baffle, moving them a distance away from the first baffle. During this movement, the reversed bottle caps are released from the pressure of the forward bottle caps, thus effectively detaching from the transverse support plate. The forward bottle caps continue to rise, and when they reach the second baffle, they gradually move towards the cap outlet under the action of the second baffle, eventually entering the cap outlet completely, and then entering the bottle cap conveyor rail one by one.

[0017] In the above-mentioned automatic granule packaging mechanism, a guide plate is also provided on the front side of the transverse support plate located in front of the annular conveyor belt. The height of the guide plate is lower than the height of the first baffle. The guide plate gradually approaches the annular conveyor belt from bottom to top. The minimum distance between the guide plate and the annular conveyor belt is slightly greater than the axial dimension of the bottle cap. The width of the guide plate extends along the length of the transverse support plate and covers the entire transverse support plate.

[0018] The minimum distance between the guide plate and the circular conveyor belt is 1-5mm larger than the axial dimension of the bottle cap. After the reverse bottle cap detaches from the transverse support plate, it can fall back into the hopper under the guidance of the guide plate, avoiding affecting the forward bottle cap located below during the falling process.

[0019] In the aforementioned automatic granule packaging mechanism, the capping device includes clamping conveyor belts located on both sides of the bottle body and tightening wheels located on both sides of the cap and driven by a motor. The conveying direction of the two clamping conveyor belts is the same as that of the bottle body conveyor belt, and the distance between the two clamping conveyor belts is slightly smaller than the diameter of the bottle body. Multiple tightening wheels are located on one side of the cap and are arranged sequentially along the conveying direction of the bottle body conveyor belt. Multiple tightening wheels are correspondingly arranged on the other side of the cap. The distance between two opposite tightening wheels matches the diameter of the cap, and the two opposite tightening wheels rotate in the same direction.

[0020] The bottle body, which enters between the two clamping conveyor belts, is clamped by the clamping conveyor belts and conveyed forward. The two opposite tightening wheels located above tighten the bottle cap onto the bottle body.

[0021] In the above-mentioned automatic granule packaging mechanism, a connecting seat is provided above the clamping conveyor belt, the tightening wheel is rotatably mounted on the connecting seat, and the motor that drives the tightening wheel to rotate is mounted on the connecting seat; a pressure plate is provided below the connecting seat, the pressure plate gradually extends downward along the conveying direction of the bottle body conveyor belt, and a spring is provided between the pressure plate and the connecting seat.

[0022] When the spring is in its initial state, the maximum distance between the pressure plate and the bottle conveyor belt is higher than the height of the bottle cap, and the minimum distance between the pressure plate and the bottle conveyor belt is no higher than the height of the medicine bottle with the cap screwed on. Under the action of the spring force, the pressure plate can squeeze the bottle cap downward to ensure that the bottle cap can be effectively screwed on the bottle body.

[0023] Compared with existing technologies, this automated granule packaging mechanism has the following advantages:

[0024] The first baffle, the second baffle, and the guide plate effectively solve the problems of reverse bottle caps being blocked and unable to fall, and the impact with forward bottle caps. The adjustable positioning structure at the end of the bottle cap conveying guide channel, consisting of a limiting component, a positioning shaft, and a support plate, enables precise positioning and orderly release of bottle caps one by one, allowing the bottle caps to fit precisely with the bottle body in the correct posture. Then, the clamping conveyor belt, the tightening wheel, and the elastic pressure plate complete the stable capping, thereby realizing the full automation of the process of granular medicine from bottle feeding, medicine filling, cap feeding and conveying to capping and sealing. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the automatic packaging mechanism for this granular medicine.

[0026] Figure 2 This is another structural schematic diagram of the automatic packaging mechanism for this granular medicine.

[0027] Figure 3 This is a cross-sectional view of the limiting component in the adjustable positioning structure when it is in its initial state.

[0028] Figure 4 This is a cross-sectional view of the bottle cap pressing against the first blocking part in the adjustable positioning structure.

[0029] Figure 5 This is a cross-sectional view of the limit component in the adjustable positioning structure when it is reset.

[0030] Figure 6 This is a schematic diagram of the bottle cap device.

[0031] Figure 7 It is a cross-sectional view of the circular conveyor belt, the first baffle, the second baffle, and the guide plate.

[0032] Figure 8 This is a schematic diagram of the capping device.

[0033] Figure 9 This is a cross-sectional view of the capping device.

[0034] In the diagram, 1. Bottle conveyor belt; 2. Bottle unloading device; 3. Filling device; 4. Bottle cap unloading device; 41. Material bin; 42. Circular conveyor belt; 43. Cap outlet bin; 44. Horizontal support plate; 45. First baffle; 46. Second baffle; 47. Guide plate; 5. Capping device; 51. Clamping conveyor belt; 52. Tightening wheel; 53. Pressure plate; 54. Spring; 6. Bottle cap conveying guide groove; 71. Support plate; 72. Positioning shaft; 73. Limiting component; 731. First blocking part; 732. Second blocking part; 74. Limiting protrusion. Detailed Implementation

[0035] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0036] like Figure 1 and Figure 2 The automatic granule packaging mechanism shown includes a horizontally extending bottle conveyor belt 1, a bottle unscrambler 2, a filling device 3, a cap unscrambler 4, and a capping device 5 arranged sequentially along the bottle conveyor belt 1. The bottle unscrambler 2 is located at the head end of the bottle conveyor belt 1 and is used to arrange the bottles in an orderly manner onto the bottle conveyor belt 1. The bottle unscrambler 2 can adopt the bottle unscrambler structure in application publication number CN117383217A, or it can adopt a bottle unscrambler 2 that can be purchased on the market, as long as it can arrange the medicines in an orderly manner onto the bottle conveyor belt 1.

[0037] The filling device 3 conveys the granular medication and feeds it into the bottle. It can use a commercially available structure, with a funnel connected to it. The bottom of the funnel is directly opposite the bottle opening located on the bottle conveyor belt 1. A predetermined quantity of granular medication enters the bottle through the funnel. The bottle conveyor belt 1 uses a stepping mechanism, or the filling device 3 can be equipped with an intermittently opening blocking structure to ensure that the bottle remains below the funnel for a certain period of time.

[0038] like Figure 6 As shown, the bottle cap sorting device 4 adopts a lifting type bottle cap sorting structure, including a material bin 41 for placing bottle caps, an inclined annular conveyor belt 42 with its lower end extending into the material bin 41, and a cap outlet bin 43 connected to the annular conveyor belt 42. The outlet of the cap outlet bin 43 is connected to a bottle cap conveying guide 6.

[0039] like Figure 6 and Figure 7 As shown, the outer surface of the annular conveyor belt 42 is provided with several evenly distributed transverse support plates 44. The distance from the side of the transverse support plate 44 away from the annular conveyor belt 42 to the annular conveyor belt 42 is greater than the distance from the center of gravity of the bottle cap facing outward to the annular conveyor belt 42, and less than the distance from the center of gravity of the bottle cap facing outward to the annular conveyor belt 42. The front side of the transverse support plate 44 located in front of the annular conveyor belt 42 is provided with a first baffle 45 and a second baffle 46. The second baffle 46 is set higher than the first baffle 45. The distances from the first baffle 45 and the second baffle 46 to the annular conveyor belt 42 are both less than the axial dimension of the bottle cap. The first baffle 45 extends upward from the right side to the middle of the transverse support plate 44, and the second baffle 46 extends upward from the left side to the right side. The cap outlet 43 is located at the upper end of the second baffle 46.

[0040] As the front side of the annular conveyor belt 42 moves upward, the transverse support plate 44 drives the bottle caps upward. Some reverse bottle caps fall smoothly under their own weight, while those that do not fall smoothly under their own weight continue to rise. When they reach the first baffle 45, the first baffle 45 pushes the positive and negative bottle caps on the corresponding transverse support plate 44 away from the first baffle 45, causing them to move a distance away from the first baffle 45. During this movement, the negative bottle caps will be freed from the pressure of the positive bottle caps, thus effectively detaching from the transverse support plate 44. The positive bottle caps continue to rise, and when they reach the second baffle 46, they gradually move towards the cap outlet 43 under the action of the second baffle 46, eventually entering the cap outlet 43 completely, and then entering the bottle cap conveying guide rail one by one.

[0041] like Figure 6 and Figure 7 As shown, a guide plate 47 is also provided on the front side of the transverse support plate 44 located in front of the annular conveyor belt 42. The height of the guide plate 47 is lower than the height of the first baffle 45. The guide plate 47 gradually approaches the annular conveyor belt 42 from bottom to top. The minimum distance between the guide plate 47 and the annular conveyor belt 42 is slightly larger than the axial dimension of the bottle cap. The width of the guide plate 47 extends along the length of the transverse support plate 44 and covers the entire transverse support plate 44. The minimum distance between the guide plate 47 and the annular conveyor belt 42 is 1-5mm larger than the axial dimension of the bottle cap. After the reverse bottle cap detaches from the transverse support plate 44, it can fall back into the hopper 41 under the guidance of the guide plate 47, avoiding affecting the forward bottle cap located below during the falling process.

[0042] like Figure 3 , Figure 4 and Figure 5 As shown, the end of the bottle cap conveying guide 6 is provided with an adjustable positioning structure for positioning the bottle cap. The adjustable positioning structure allows only one bottle cap to pass through at a time. The cap screwing device 5 is used to screw the bottle cap onto the bottle body.

[0043] like Figure 3As shown, the bottle cap conveying guide 6 is located directly above the bottle body conveyor belt 1 and extends downward at an angle along the conveying direction of the bottle body conveyor belt 1. The adjustable positioning structure includes support plates 71 fixed on both sides of the bottle cap conveying guide 6, a positioning shaft 72 disposed between the two support plates 71, and a limiting member 73 rotatably disposed on the positioning shaft 72. The positioning shaft 72 extends horizontally along the conveying direction perpendicular to the bottle cap conveying guide 6. The lower end of the limiting member 73 has a first blocking part 731 that is further inclined downward relative to the limiting member 73. The bottle cap that moves to the end of the bottle cap conveying guide 6 is blocked by the first blocking part 731 in the initial state. The upper end of the limiting member 73 has a second blocking part 732. When the first blocking part 731 is in the initial state, the second blocking part 732 disengages from blocking the next bottle cap. When the limiting member 73 rotates, the second blocking part 732 gradually extends into the lower side of the next bottle cap to block the next bottle cap. Although the second cap is directly attached to the first cap, the cap is round, and there is a space between the two caps located on both sides to facilitate the insertion of the second blocking part 732. The second blocking part 732 can be set to two, corresponding to the two spaces respectively.

[0044] like Figure 3 As shown, when the first blocking part 731 is in its initial state, the bottle caps conveyed by the bottle cap conveying guide 6 are blocked by the first blocking part 731, keeping the bottle caps at the end of the conveying guide 6. At this time, half of the bottle cap is supported by the bottle cap conveying guide 6, and the second blocking part 732 does not extend into the space between two adjacent bottle caps. After the bottle body below moves over, it will push the bottle cap to move forward together. Under the squeezing action of the bottle cap, such as... Figure 4 As shown, the first blocking part 731 will gradually swing upward, eventually causing the first blocking part 731 to break free from the obstruction of the bottle cap. At the same time, the second blocking part 732 will gradually extend into the space between two adjacent bottle caps, preventing the latter bottle cap from moving forward.

[0045] The limiting member 73 is configured such that its front weight is greater than its rear weight. When the first bottle cap completely passes the first blocking part 731 under the action of the bottle body, as... Figure 5 As shown, the limiting member 73 returns to its initial state under its own gravity, the second blocking part 732 pushes away the obstruction of the next bottle cap, and the next bottle cap moves forward under its own gravity until it is blocked by the first blocking part 731.

[0046] like Figure 3 , Figure 4 and Figure 5 As shown, the support plate 71 is provided with a limiting protrusion 74 located below the limiting member 73. The limiting member 73 can abut against the limiting protrusion 74 under its own weight. When the limiting member 73 abuts against the limiting protrusion 74, the limiting member 73 is in the initial state.

[0047] In other embodiments, a torsion spring is provided between the limiting member 73 and the support plate 71. The limiting member 73 can abut against the limiting protrusion 74 under the elastic force of the torsion spring, which can prevent the subsequent bottle cap from being blocked by the first blocking part 731 due to excessive inertia. After the torsion spring is provided, the force exerted by the bottle body on the bottle cap will increase accordingly. Therefore, the bottle body conveyor belt 1 located below must clamp and transport the bottle body.

[0048] like Figure 8 As shown, the capping device 5 includes clamping conveyor belts 51 located on both sides of the bottle body and tightening rollers 52 located on both sides of the cap and driven by a motor. The conveying direction of the two clamping conveyor belts 51 is the same as that of the bottle body conveyor belt 1, and the distance between the two clamping conveyor belts 51 is slightly smaller than the diameter of the bottle body. Multiple tightening rollers 52 are located on one side of the cap and are arranged sequentially along the conveying direction of the bottle body conveyor belt 1. Multiple tightening rollers 52 are correspondingly arranged on the other side of the cap. The distance between two opposite tightening rollers 52 matches the diameter of the cap, and the two opposite tightening rollers 52 rotate in the same direction. The bottle body entering between the two clamping conveyor belts 51 is clamped by the clamping conveyor belts 51 and conveyed forward. The two opposite tightening rollers 52 located above tighten the cap onto the bottle body.

[0049] like Figure 9 As shown, a connecting seat is provided above the clamping conveyor belt 51, and the tightening wheel 52 is rotatably mounted on the connecting seat. The motor that drives the tightening wheel 52 to rotate is also located on the connecting seat. Figure 9 As shown, a pressure plate 53 is provided below the connecting seat. The pressure plate 53 gradually extends downward along the conveying direction of the bottle body conveyor belt 1. A spring 54 is provided between the pressure plate 53 and the connecting seat. When the spring 54 is in its initial state, the maximum distance between the pressure plate 53 and the bottle body conveyor belt 1 is higher than the height of the bottle cap, and the minimum distance between the pressure plate 53 and the bottle body conveyor belt 1 is not higher than the height of the medicine bottle with the cap screwed on. Under the action of the elastic force of the spring 54, the bottle cap can be squeezed downward by the pressure plate 53 to ensure that the bottle cap can be effectively screwed on the bottle body.

[0050] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. An automatic packaging mechanism for granular medicines, characterized in that, The device includes a bottle conveyor belt (1), a bottle sorting device (2), a medicine filling device (3), a bottle cap sorting device (4), and a cap screwing device (5) arranged sequentially along the bottle conveyor belt (1). The bottle sorting device (2) is used to arrange the bottles in an orderly manner on the bottle conveyor belt (1). The medicine filling device (3) is used to fill the bottles with granular medicine. The bottle cap sorting device (4) is connected to a bottle cap conveying guide groove (6) located above the bottle conveyor belt (1). The conveying end of the bottle cap conveying guide groove (6) is provided with an adjustable positioning structure for positioning the bottle cap. The adjustable positioning structure allows only one bottle cap to pass through at a time. The cap screwing device (5) is used to screw the bottle cap tightly onto the bottle.

2. The automatic granule packaging mechanism according to claim 1, characterized in that, The bottle cap conveying guide groove (6) is located directly above the bottle body conveyor belt (1) and extends downwards at an angle along the conveying direction of the bottle body conveyor belt (1). The adjustable positioning structure includes support plates (71) fixed on both sides of the bottle cap conveying guide groove (6), a positioning shaft (72) disposed between the two support plates (71), and a limiting member (73) rotatably disposed on the positioning shaft (72). The positioning shaft (72) extends horizontally along the conveying direction perpendicular to the bottle cap conveying guide groove (6). The lower end of the limiting member (73) has a relative to the limiting member ( 73) The first blocking part (731) is further inclined downward. The bottle cap that moves to the end of the bottle cap conveying guide groove (6) is blocked by the first blocking part (731) in the initial state. The upper end of the limiting member (73) has a second blocking part (732). When the first blocking part (731) is in the initial state, the second blocking part (732) disengages from blocking the next bottle cap. When the limiting member (73) rotates, the second blocking part (732) gradually extends into the lower side of the next bottle cap to block the next bottle cap.

3. The automatic granule packaging mechanism according to claim 2, characterized in that, The support plate (71) is provided with a limiting protrusion (74) located below the limiting member (73). The limiting member (73) can abut against the limiting protrusion (74) under its own weight. When the limiting member (73) abuts against the limiting protrusion (74), the limiting member (73) is in the initial state.

4. The automatic granule packaging mechanism according to claim 3, characterized in that, A torsion spring is provided between the limiting member (73) and the support plate (71), and the limiting member (73) can abut against the limiting protrusion (74) under the elastic force of the torsion spring.

5. The automatic granule packaging mechanism according to claim 1, 2, 3, or 4, characterized in that, The bottle cap feeding device (4) includes a hopper (41) for placing bottle caps, an inclined annular conveyor belt (42) with its lower end extending into the hopper (41), and a cap outlet hopper (43) connected to the annular conveyor belt (42). The bottle cap conveying guide groove (6) is connected to the cap outlet hopper (43). The outer surface of the annular conveyor belt (42) is provided with a plurality of evenly distributed transverse support plates (44). The distance from the side of the transverse support plate (44) away from the annular conveyor belt (42) to the annular conveyor belt (42) is greater than the distance from the center of gravity of the bottle cap facing outward to the annular conveyor belt (42), and less than the distance from the cap surface. The distance from the center of gravity of the outward-facing reverse bottle cap to the annular conveyor belt (42) is such that a first baffle (45) and a second baffle (46) are provided on the front side of the transverse support plate (44) located in front of the annular conveyor belt (42). The distances from the first baffle (45) and the second baffle (46) to the annular conveyor belt (42) are both less than the axial dimension of the bottle cap. The first baffle (45) extends upward at an angle and partially covers the transverse support plate (44). The second baffle (46) extends upward at an angle and completely covers the transverse support plate (44). The cap outlet (43) is located at the upper end of the second baffle (46).

6. The automatic granule packaging mechanism according to claim 5, characterized in that, A guide plate (47) is also provided on the front side of the transverse support plate (44) located in front of the annular conveyor belt (42). The height of the guide plate (47) is lower than the height of the first baffle (45). The guide plate (47) gradually approaches the annular conveyor belt (42) from bottom to top. The minimum distance between the guide plate (47) and the annular conveyor belt (42) is slightly greater than the axial dimension of the bottle cap. The width of the guide plate (47) extends along the length direction of the transverse support plate (44) and covers the entire transverse support plate (44).

7. The automatic granule packaging mechanism according to claim 1, 2, 3, or 4, characterized in that, The capping device (5) includes clamping conveyor belts (51) located on both sides of the bottle body and tightening wheels (52) located on both sides of the cap and driven by a motor. The conveying direction of the two clamping conveyor belts (51) is the same as the conveying direction of the bottle body conveyor belt (1), and the distance between the two clamping conveyor belts (51) is slightly smaller than the diameter of the bottle body. There are multiple tightening wheels (52) located on one side of the cap and arranged sequentially along the conveying direction of the bottle body conveyor belt (1). Multiple tightening wheels (52) are arranged on the other side of the cap. The distance between two tightening wheels (52) arranged opposite each other matches the diameter of the cap, and the two tightening wheels (52) arranged opposite each other have the same rotation direction.

8. The automatic granule packaging mechanism according to claim 7, characterized in that, A connecting seat is provided above the clamping conveyor belt (51), and the tightening wheel (52) is rotatably mounted on the connecting seat. The motor that drives the tightening wheel (52) to rotate is mounted on the connecting seat. A pressure plate (53) is provided below the connecting seat. The pressure plate (53) gradually extends downward along the conveying direction of the bottle body conveyor belt (1). A spring (54) is provided between the pressure plate (53) and the connecting seat.

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