A conveying structure of a traditional Chinese medicine decoction piece packaging machine

Abstract

The application discloses a conveying structure of a traditional Chinese medicine decoction piece packaging machine and relates to the field of conveying equipment. In the application, the locking mechanism is used for locking the unwinding roller, the supporting force of the packaging bag on the tension roller is improved when the packaging bag is pulled, the supporting force provided by the packaging bag can push and move the tension roller upward, the locking mechanism can be loosened to lock the unwinding roller when the tension roller moves upward, the unwinding process is more labor-saving, the working energy consumption of the traditional Chinese medicine decoction piece packaging machine is reduced, and the production cost is lowered. When the traditional Chinese medicine decoction piece packaging machine stops pulling the packaging bag, the tension roller can descend to tension the loose packaging bag again, the descending tension roller drives the locking mechanism to lock and fix the unwinding roller again, the continuous rotation and unwinding of the packaging bag roll on the unwinding roller are prevented, the packaging bag continues to keep the tension state through the cooperation of the tension roller and the locking mechanism, and the normal work of the traditional Chinese medicine decoction piece packaging machine is prevented from being affected by the loose winding of the packaging bag roll.

Description

Technical Field

[0001] This invention belongs to the field of conveying equipment, and more specifically, relates to a conveying structure for a packaging machine for traditional Chinese medicine decoction pieces. Background Technology

[0002] Prepared medicinal herbs are Chinese medicinal materials that have been processed according to traditional Chinese medicine theories and methods, and can be directly used in clinical practice. After processing, prepared medicinal herbs need to be packaged in water-permeable bags to allow for water and herb separation during brewing and to facilitate the disposal of dregs after use.

[0003] In existing technologies, Chinese herbal medicine slices are generally packaged automatically using packaging machines. When the packaging machine is running, it pulls the packaging bag, and the packaging bag roll and clamping roller are pulled by external force to rotate and loosen the roll for feeding. When the external force is removed, due to inertia, the clamping roller does not stop rotating immediately. Therefore, every time the packaging machine stops pulling, the packaging bag roll will loosen, which can easily affect the normal operation of the packaging machine and reduce the packaging quality.

[0004] Chinese patent CN114803643B discloses a triangular packaging machine for rhizome-type Chinese medicinal herbs, including a mounting base, a material roller, a pre-tightening drum, and an adjusting plate. The mounting base includes a base plate and two vertical plates symmetrically arranged on the upper side of the base plate. The base plate has symmetrically arranged grooves at both ends, and the lower edges of the two vertical plates are slidably connected to the grooves on the base plate. The material roller is arranged between the two vertical plates, and side baffles are arranged at both ends of the material roller. Packaging bag rolls are wound on the material roller. The pre-tightening drum is arranged between the side baffles and the vertical plates. The outer side of the pre-tightening drum away from the side baffles is hollow. A spring is sleeved inside the pre-tightening drum. Locking discs with a central protrusion are concentrically distributed inside the pre-tightening drum. One end of the spring is fixedly connected to the pre-tightening drum, and the other end of the spring is fixedly connected to the locking disc. The central protrusion of the locking disc is rotatably connected to the pre-tightening drum through a rolling bearing, and the central part of the locking disc is rotatably connected to the material roller through a rolling bearing.

[0005] In the aforementioned patent, the material roller needs to overcome the friction of the second friction plate when it rotates. However, as the second friction plate continues to wear out, the frictional resistance provided by the second friction plate will become lower and lower, thus affecting the normal operation of the packaging machine. Moreover, since the packaging machine needs to continuously overcome the frictional resistance of the second friction plate during operation, it will increase the power loss of the packaging machine and thus increase the production cost. Summary of the Invention

[0006] In view of the problems in related technologies, the present invention proposes a conveying structure for a packaging machine for Chinese herbal medicine slices, so as to overcome the above-mentioned technical problems existing in the existing related technologies.

[0007] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution:

[0008] The present invention is a conveying structure for a packaging machine for Chinese herbal medicine slices, including a support, an unwinding roller rotatably mounted on the upper end of the support, and a packaging bag roll fixedly mounted on the surface of the unwinding roller. The upper end of the support is also equipped with a tensioning mechanism for guiding and limiting the packaging bags on the packaging bag roll.

[0009] The tensioning mechanism includes a tensioning roller, a guide roller, and an elastic lifting assembly. The guide roller is rotatably mounted on one side of the unwinding roller, and the tensioning roller is mounted between the unwinding roller and the guide roller via the elastic lifting assembly.

[0010] The bracket is also equipped with a locking mechanism for locking the unwinding roller, and the locking mechanism is connected to the tensioning roller so that when the tensioning roller moves upward, it can drive the locking mechanism to release the lock on the unwinding roller.

[0011] Furthermore, the elastic lifting assembly includes two lifting slides, which are respectively opened at both ends of the bracket, and a lifting seat is slidably installed inside each of the two lifting slides. The two ends of the tension roller are rotatably connected to the two lifting seats respectively. A spring hole is opened at the top of the lifting slide, and a pressure spring that abuts against the top of the lifting seat is installed in the spring hole.

[0012] Furthermore, a locking block is fixedly installed on one side of the outer surface of the lifting seat, and a pin seat fixedly installed on the bracket is provided on one side of the lifting slide. A pin shaft is slidably inserted inside the pin seat, one end of the pin shaft extends to one end of the opening of the lifting slide, and a return spring is installed at the other end of the pin shaft.

[0013] Furthermore, the locking mechanism includes a dynamic friction plate, a static friction plate, a translational conveying assembly, and a transmission assembly. The static friction plate is fixedly installed at the end of the unwinding roller. The dynamic friction plate is installed on the bracket via the translational conveying assembly, and the dynamic friction plate is located on one side of the static friction plate. The translational conveying assembly is connected to the lifting seat via the transmission assembly.

[0014] Furthermore, the translational conveying assembly includes a limiting guide shaft and a lead screw. The limiting guide shaft is fixedly installed on the bracket and located on one side of the end of the unwinding roller. A movable plate is slidably installed on the limiting guide shaft. The moving friction plate is fixedly installed on the outer side of the movable plate. A threaded sleeve is fixedly installed on the bottom of the movable plate.

[0015] The lead screw is rotatably mounted on the outer end of the bracket, and the lead screw is threadedly connected to the threaded sleeve.

[0016] Furthermore, the transmission assembly includes a rack, a drive shaft, and a driven wheel. The drive shaft is rotatably mounted on the outer side of the bracket and located on one side of the lifting slide. A gear and a drive wheel are fixedly mounted on the drive shaft.

[0017] The rack is fixedly installed on one end of the outer side of the lifting seat, and the rack is meshed with the gear for transmission. The driven wheel is fixedly installed on one end of the lead screw, and the driven wheel and the driving wheel are connected by a transmission belt.

[0018] Furthermore, an end plate is fixedly installed at the end of the unwinding roller, and a sliding hole is provided on the inner side of the end plate. The static friction plate is slidably installed in the sliding hole, and a connecting shaft is fixedly installed on the side wall of the sliding hole. One end of the connecting shaft is slidably inserted into the static friction plate, and a support spring that abuts against one side of the static friction plate is sleeved on the outer ring of the connecting shaft.

[0019] Furthermore, the static friction pad has a slot corresponding to the connecting shaft, and a limiting plate that is slidably engaged in the slot is fixedly installed at the end of the connecting shaft.

[0020] Furthermore, multiple card blocks are provided, and the multiple card blocks are distributed at equal intervals from top to bottom along the edge of the outer side of the lifting seat, and the distance between adjacent card blocks is greater than the diameter of the pin.

[0021] The present invention has the following beneficial effects:

[0022] 1. In this invention, a tension roller is installed below the unwinding roller on one side. When the Chinese herbal medicine packaging machine pulls and conveys the packaging bag, the taut packaging bag provides an upward supporting force to the tension roller, causing the tension roller to move upward. When the Chinese herbal medicine packaging machine stops pulling the packaging bag, the packaging bag roll continues to unwind due to inertia, causing the packaging bag that has passed through the tension roller to be in a flexible and relaxed state, no longer providing a supporting force to the tension roller. At this time, the tension roller moves downward and resets under the reset force of the elastic lifting component, re-tensioning the packaging bag that has unwound due to inertia, thereby keeping the packaging bag in a taut state and preventing the normal operation of the Chinese herbal medicine packaging machine from being affected by the loosening of the packaging bag roll.

[0023] 2. In this invention, a locking mechanism is installed at the end of the unwinding roller. When the Chinese herbal medicine packaging machine starts to pull and convey the packaging bag, the unwinding roller will not rotate and unwind because it is in a locked state. As the packaging bag is continuously pulled, the supporting force provided by the packaging bag to the tensioning roller increases, thus ensuring that the supporting force provided by the packaging bag can push the tensioning roller upward. When the tensioning roller moves upward, it drives the two friction plates in the locking mechanism to move and separate, thereby causing the locking mechanism to loosen its lock on the unwinding roller. This prevents the two friction plates from being worn due to mutual friction during the unwinding process, improving the service life of the friction plates. At the same time, since the unwinding roller does not need to overcome the frictional resistance between the friction plates during the unwinding process, the unwinding process is more labor-saving, reducing the working energy consumption of the Chinese herbal medicine packaging machine and lowering production costs.

[0024] 3. In this invention, when the Chinese herbal medicine packaging machine stops pulling the tensioning roller of the packaging bag downwards, the two friction plates in the tensioning roller drive locking mechanism move and close to each other. The frictional resistance of the two friction plates abutting each other locks the unwinding roller, preventing the packaging bag roll on the unwinding roller from continuing to unwind due to inertia. At the same time, when the tensioning roller moves downwards, it tensions the already unwound packaging bag. Thus, through the cooperation of the locking mechanism and the tensioning roller, the tensioning effect of the packaging bag roll is improved, preventing the normal operation of the Chinese herbal medicine packaging machine from being affected by the loosening of the packaging bag roll.

[0025] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, the drawings can be obtained from these drawings without creative effort.

[0027] Figure 1 This is one of the three-dimensional cross-sectional structural diagrams of the conveying structure of the present invention;

[0028] Figure 2 For the present invention Figure 1 A magnified schematic diagram of the structure at point A;

[0029] Figure 3 For the present invention Figure 1 A magnified schematic diagram of the structure at point B;

[0030] Figure 4 This is the second three-dimensional cross-sectional schematic diagram of the conveying structure of the present invention;

[0031] Figure 5 For the present invention Figure 4 A magnified schematic diagram of the structure at point C;

[0032] Figure 6 This is a three-dimensional structural diagram of the conveying structure of the present invention;

[0033] Figure 7 For the present invention Figure 6 A magnified schematic diagram of the structure at point D;

[0034] Figure 8 This is an exploded structural diagram of the conveying structure of the present invention;

[0035] Figure 9 For the present invention Figure 8 A magnified schematic diagram of the structure at point E;

[0036] Figure 10 This is a schematic diagram of the conveying structure of the present invention when the packaging bag roll is not installed.

[0037] In the diagram: 1. Support; 2. Unwinding roller; 3. Tensioning mechanism; 31. Tensioning roller; 32. Guide roller; 33. Lifting chute; 34. Lifting seat; 35. Locking block; 36. Pin seat; 37. Return spring; 38. Pin shaft; 39. Spring hole; 310. Pressure spring; 4. Locking mechanism; 41. Rack; 42. Drive shaft; 43. Gear; 44. Drive wheel; 45. Drive belt; 46. Limiting guide shaft; 47. Moving plate; 48. Dynamic friction plate; 49. Lead screw; 410. Threaded sleeve; 411. Driven wheel; 412. End plate; 413. Connecting shaft; 414. Sliding hole; 415. Support spring; 416. Static friction plate;

[0038] 100. Packaging bag rolls; 200. Packaging bags. Detailed Implementation

[0039] The technical solutions of the embodiments of the invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the invention.

[0040] In the description of this invention, it should be understood that the terms "opening", "upper", "lower", "top", "middle", "inner", etc., which indicate orientation or positional relationship, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the invention.

[0041] Please see Figure 1 , Figure 10As shown, the present invention is a conveying structure for a packaging machine for Chinese herbal medicine slices, including a support 1, an unwinding roller 2 rotatably mounted on the upper end of the support 1, and a packaging bag roll 100 fixedly mounted on the surface of the unwinding roller 2. The upper end of the support 1 is also equipped with a tensioning mechanism 3 for guiding and limiting the packaging bag 200 on the packaging bag roll 100. The tensioning mechanism 3 includes a tensioning roller 31, a guide roller 32, and an elastic lifting assembly. The guide roller 32 is rotatably mounted on one side of the unwinding roller 2, and the tensioning roller 31 is mounted between the unwinding roller 2 and the guide roller 32 through the elastic lifting assembly. The support 1 is also equipped with a locking mechanism 4 for locking and fixing the unwinding roller 2, and the locking mechanism 4 is connected to the tensioning roller 31 in a transmission manner so that when the tensioning roller 31 moves upward, it can drive the locking mechanism 4 to release the lock on the unwinding roller 2.

[0042] In this process, the packaging bag 200 on the packaging bag roll 100 passes under the tension roller 31, then passes through the guide roller 32, and connects to the traditional Chinese medicine decoction piece packaging machine. When the traditional Chinese medicine decoction piece packaging machine pulls the packaging bag 200, it tightens and straightens the packaging bag 200. Since the unwinding roller 2 is in a locked state, it will not drive the packaging bag roll 100 to rotate and unwind. As the packaging bag 200 is continuously pulled, the supporting force provided by the packaging bag 200 to the tension roller 31 becomes larger and larger, causing the tension roller 31 to move upward under the support of the packaging bag 200. During the upward movement of the tension roller 31, the locking mechanism 4 is driven to release the lock on the unwinding roller 2. At this time, the unwinding roller 2 drives the packaging bag roll 100 to rotate. The unwinding process is as follows: the unwinding roller 2 rotates while the tension roller 31 remains stationary under the support of the packaging bag 200, thus keeping the unwinding roller 2 in an unwinding state. When the Chinese herbal medicine packaging machine stops traction on the packaging bag 200, the unwinding roller 2 and the packaging bag roll 100 continue to rotate and unwind under the action of rotational inertia, so that the packaging bag 200 passing under the tension roller 31 is in a flexible and relaxed state and no longer provides support to the tension roller 31. At this time, the tension roller 31 moves downward and resets under the reset force of the elastic lifting component, re-tensioning the packaging bag 200 that has been unwound due to inertia. At the same time, the tension roller 31 drives the locking mechanism 4 to restore the lock on the unwinding roller 2, preventing the packaging bag roll 100 on the unwinding roller 2 from continuing to rotate and unwind.

[0043] In this invention, the locking mechanism 4 locks the unwinding roller 2, which improves the support force of the packaging bag 200 on the tensioning roller 31 when it is being pulled. This ensures that the support force provided by the packaging bag 200 can push the tensioning roller 31 upward. When the tensioning roller 31 moves upward, it can drive the locking mechanism 4 to loosen the lock on the unwinding roller 2, making the unwinding process more labor-saving, reducing the energy consumption of the Chinese herbal medicine packaging machine, and lowering production costs. When the Chinese herbal medicine packaging machine stops pulling the packaging bag 200, the tensioning roller 31 can move downward to re-tension the loose packaging bag 200. At the same time, the downward tensioning roller 31 drives the locking mechanism 4 to lock the unwinding roller 2 again, preventing the packaging bag roll 100 on the unwinding roller 2 from continuously rotating and unwinding. Thus, through the cooperation of the tensioning roller 31 and the locking mechanism 4, the packaging bag 200 continues to maintain a taut state, preventing the unwinding of the packaging bag roll 100 from affecting the normal operation of the Chinese herbal medicine packaging machine.

[0044] Please see Figure 1 , Figure 2 As shown, in one embodiment, the elastic lifting assembly includes two lifting slides 33, which are respectively opened at both ends of the bracket 1, and lifting seats 34 are slidably installed inside the two lifting slides 33. The two ends of the tension roller 31 are rotatably connected to the two lifting seats 34 respectively. A spring hole 39 is opened at the top of the lifting slide 33, and a pressure spring 310 abutting against the top of the lifting seat 34 is installed in the spring hole 39.

[0045] When the tension roller 31 moves upward under the support of the packaging bag 200, it drives the lifting seat 34 to slide upward along the lifting groove 33. At the same time, the lifting seat 34 squeezes and contracts the pressure spring 310. When the packaging bag 200 becomes loose due to the inertia of the packaging bag roll 100, the packaging bag 200 no longer provides support to the tension roller 31. At this time, the lifting seat 34 returns to its original position along the lifting groove 33 under the reset force of the pressure spring 310, thereby driving the tension roller 31 to move downward, so that the tension roller 31 can re-tension the loose packaging bag 200.

[0046] Please see Figure 1 , Figure 2 , Figure 4 , Figure 5 As shown, in one embodiment, a locking block 35 is fixedly installed on one side of the outer surface of the lifting seat 34, and a pin seat 36 fixedly installed on the bracket 1 is provided on one side of the lifting slide 33. A pin shaft 38 is slidably inserted into the inside of the pin seat 36. One end of the pin shaft 38 extends to one end of the groove of the lifting slide 33, and a return spring 37 is installed at the other end of the pin shaft 38. Multiple locking blocks 35 are provided, and the multiple locking blocks 35 are distributed at equal intervals from top to bottom along the edge of the outer side of the lifting seat 34, and the distance between adjacent locking blocks 35 is greater than the diameter of the pin shaft 38.

[0047] At least two locking blocks 35 are provided. Guide arc surfaces are provided on the outer end of the pin 38 and on the side of the locking block 35 facing the pin 38. This allows the locking block 35 to push the pin 38 back into the pin seat 36 via the guide arc surfaces when the lifting seat 34 moves the locking block 35 upwards past the pin 38, thus not affecting the normal upward movement of the lifting seat 34 and the tension roller 31. When the lifting seat 34 moves the lowest locking block 35 to the upper end of the pin 38, the locking mechanism 4 releases the lock on the unwinding roller 2, allowing the packaging bag roll 100 on the unwinding roller 2 to begin unwinding. At this time, the packaging bag 200 is not... The tension roller 31 is then locked tight, reducing its support force and preventing it from moving upwards. Simultaneously, the pin 38 moves to the left under the return force of the return spring 37, causing the end of the pin 38 to abut against the lower end of the locking block 35. This abuts and limits the movement of the pin 38 and the locking block 35, providing auxiliary support for the lifting seat 34 and the tension roller 31, improving the stability of the tension roller 31, keeping it balanced, and preventing the tension roller 31 from resetting downwards under the return force of the pressure spring 310 during unwinding. This ensures that the unwinding roller 2 and the packaging bag roll 100 rotate and unwind normally.

[0048] Furthermore, the abutting and limiting force of the pin 38 against the locking block 35 is less than the restoring force of the pressure spring 310. When the packaging bag 200 loosens due to inertia and no longer provides support to the tension roller 31, the pressure spring 310 drives the lifting seat 34 and the tension roller 31 to move downward. At the same time, the locking block 35 abuts and retracts the pin 38 until the downward tension roller 31 re-tensions the packaging bag 200. At this time, the pin 38 abuts against the bottom end of the upper locking block 35 to provide auxiliary support for the lifting seat 34 and the tension roller 31, thereby improving the stability of the lifting seat 34 and the tension roller 31.

[0049] Please see Figures 1-3 , Figures 6-9 As shown, in one embodiment, the locking mechanism 4 includes a dynamic friction plate 48, a static friction plate 416, a translational conveying assembly, and a transmission assembly. The static friction plate 416 is fixedly installed at the end of the unwinding roller 2. The dynamic friction plate 48 is installed on the bracket 1 through the translational conveying assembly, and the dynamic friction plate 48 is located on one side of the static friction plate 416. The translational conveying assembly is connected to the lifting seat 34 through the transmission assembly.

[0050] Specifically, the translational conveying assembly includes a limiting guide shaft 46 and a lead screw 49. The limiting guide shaft 46 is fixedly installed on the bracket 1 and located on one side of the end of the unwinding roller 2. A movable plate 47 is slidably installed on the limiting guide shaft 46. A dynamic friction plate 48 is fixedly installed on the outer side of the movable plate 47, and a threaded sleeve 410 is fixedly installed on the bottom of the movable plate 47. The lead screw 49 is rotatably installed on the outer end of the bracket 1, and the lead screw 49 is threadedly connected to the threaded sleeve 410. The transmission assembly includes a rack 41, a transmission shaft 42, and a driven wheel 411. The transmission shaft 42 is rotatably installed on the outer side of the bracket 1 and located on one side of the lifting chute 33. A gear 43 and a driving wheel 44 are fixedly installed on the transmission shaft 42. The rack 41 is fixedly installed on one end of the outer side of the lifting seat 34, and the rack 41 is meshed with the gear 43 for transmission. The driven wheel 411 is fixedly installed on one end of the lead screw 49, and the driven wheel 411 and the driving wheel 44 are connected by a transmission belt 45.

[0051] The moving friction plate 48 initially abuts against one side of the stationary friction plate 416, thereby locking and fixing the unwinding roller 2 through the frictional resistance between the moving friction plate 48 and the stationary friction plate 416. When the Chinese medicine packaging machine pulls the packaging bag 200 to make the lifting seat 34 move upward, the lifting seat 34 drives the rack 41 to move upward synchronously, so that the rack 41 meshes with the drive gear 43 to rotate. The gear 43 drives the drive wheel 44 to rotate synchronously through the transmission shaft 42. The drive wheel 44 then drives the driven wheel 411 to rotate through the transmission belt 45, which in turn drives the lead screw 49 to rotate. When the lead screw 49 rotates, it drives the threaded sleeve 410 to move towards the support 1 through the threaded transmission, thereby driving the moving plate 47 to move closer to the support 1 along the limiting guide shaft 46. This causes the moving friction plate 48 on the outer side of the moving plate 47 to gradually separate from the stationary friction plate 416, so as to release the frictional lock between the moving friction plate 48 and the stationary friction plate 416, and allow the unwinding roller 2 to unwind normally.

[0052] When the Chinese herbal medicine packaging machine stops traction and the lifting seat 34 of the packaging bag 200 returns to its lower position, the lifting seat 34 drives the rack 41 to move down synchronously, causing the rack 41 to mesh with the drive gear 43 to rotate in the opposite direction. The gear 43 drives the drive wheel 44 to rotate in the opposite direction synchronously through the transmission shaft 42. Then, through the drive wheel 44, the transmission belt 45 and the driven wheel 411, the drive screw 49 rotates in the opposite direction. When the screw 49 rotates in the opposite direction, it drives the threaded sleeve 410 to move away from the bracket 1 through the thread transmission, thereby driving the moving plate 47 to move along the limit guide shaft 46 towards the static friction plate 416. This causes the moving friction plate 48 on the outer side of the moving plate 47 to gradually come into contact with the static friction plate 416, so that the unwinding roller 2 is locked by the frictional resistance between the moving friction plate 48 and the static friction plate 416, preventing the unwinding roller 2 and the packaging bag roll 100 from continuing to rotate and unwind due to inertia.

[0053] During the unwinding process, the two friction plates are driven to move and separate, so that the two friction plates will not be worn due to mutual friction during the unwinding process, thus improving the service life of the friction plates. At the same time, since the unwinding roller 2 does not need to overcome the frictional resistance between the friction plates during the unwinding process, the unwinding process is more labor-saving, reducing the working energy consumption of the Chinese herbal medicine packaging machine and lowering the production cost.

[0054] Please see Figure 1 , Figure 3 As shown, in one embodiment, an end plate 412 is fixedly installed at the end of the unwinding roller 2. A sliding hole 414 is provided on the inner side of the end plate 412. A static friction plate 416 is slidably installed in the sliding hole 414. A connecting shaft 413 is fixedly installed on the side wall of the sliding hole 414. One end of the connecting shaft 413 is slidably inserted into the static friction plate 416. A support spring 415 that abuts against one side of the static friction plate 416 is sleeved on the outer ring of the connecting shaft 413.

[0055] When the tension roller 31 and the lifting seat 34 move downward, driving the moving friction plate 48 to move and come into contact with the stationary friction plate 416, as the tension roller 31 and the lifting seat 34 continue to move downward, the moving friction plate 48 continues to move towards the stationary friction plate 416. At this time, the moving friction plate 48 pushes the stationary friction plate 416 into the sliding hole 414, and at the same time, the support spring 415 is pushed and compressed by the stationary friction plate 416, thereby providing support elasticity to the stationary friction plate 416, so that the stationary friction plate 416 and the moving friction plate 48 are in contact and locked.

[0056] By installing the static friction plate 416 in a sliding manner, the dynamic friction plate 48 is locked in place with the static friction plate 416. This allows the dynamic friction plate 48 to continue moving toward the static friction plate 416, preventing the dynamic friction plate 48 from locking the lifting seat 34 through the translation drive assembly and transmission assembly. The lifting seat 34 and the tension roller 31 can continue to move downward, giving the tension roller 31 enough downward space to re-tighten the loose packaging bag 200.

[0057] Please see Figure 1 , Figure 3 As shown, in one embodiment, a slot corresponding to the connecting shaft 413 is provided in the static friction plate 416, and a limiting plate that is slidably locked in the slot is fixedly installed at the end of the connecting shaft 413.

[0058] When the tension roller 31 and the lifting seat 34 move upward, driving the moving friction plate 48 to move away from the stationary friction plate 416, the stationary friction plate 416, under the elastic force of the support spring 415, always abuts against one side of the moving friction plate 48, keeping the moving friction plate 48 and the stationary friction plate 416 locked together. At the same time, the limiting plate slides outward relative to the slot until it moves to abut against the end of the slot, limiting and fixing the stationary friction plate 416. Then, as the moving friction plate 48 continues to move, the moving friction plate 48 separates from the stationary friction plate 416, and the unwinding roller 2 is no longer locked. Thus, the limiting plate limits the stationary friction plate 416, preventing the two friction plates from separating. Under the restoring elastic force of the support spring 415, the stationary friction plate 416 moves outward excessively, ensuring that the moving friction plate 48 and the stationary friction plate 416 can separate normally.

[0059] Specific working principle:

[0060] The packaging bag 200 on the packaging bag roll 100 passes under the tension roller 31, and then connects to the Chinese herbal medicine packaging machine after passing through the guide roller 32. When the Chinese herbal medicine packaging machine pulls the packaging bag 200, it pulls the packaging bag 200 taut and straight. Since the unwinding roller 2 is in a locked state, it will not drive the packaging bag roll 100 to rotate and unwind. As the packaging bag 200 is continuously pulled, the supporting force provided by the packaging bag 200 to the tension roller 31 becomes greater and greater, causing the tension roller 31 to move upward under the support of the packaging bag 200.

[0061] When the tension roller 31 moves upward, it drives the lifting seat 34 to slide upward along the lifting slide 33. At the same time, the lifting seat 34 drives the rack 41 to move upward synchronously, so that the rack 41 meshes with the drive gear 43 to rotate. The gear 43 drives the drive wheel 44 to rotate synchronously through the transmission shaft 42. The drive wheel 44 then drives the driven wheel 411 to rotate through the transmission belt 45, which in turn drives the lead screw 49 to rotate. When the lead screw 49 rotates, it drives the threaded sleeve 410 to move towards the support 1 through the threaded transmission, thereby driving the moving plate 47 to move closer to the support 1 along the limiting guide shaft 46. This causes the dynamic friction plate 48 and the static friction plate 416 on the outer side of the moving plate 47 to gradually separate, so as to release the friction lock between the dynamic friction plate 48 and the static friction plate 416, so that the unwinding roller 2 can start unwinding.

[0062] When the Chinese herbal medicine packaging machine stops pulling the packaging bag 200, the unwinding roller 2 and the packaging bag roll 100 continue to rotate and unwind under the action of rotational inertia, so that the packaging bag 200 passing under the tensioning roller 31 is in a flexible and relaxed state and no longer provides support force to the tensioning roller 31. At this time, the lifting seat 34 is reset by the reset elastic force of the pressure spring 310 along the lifting slide 33, thereby driving the tensioning roller 31 to move downward, so that the tensioning roller 31 re-abuts and tightens the loose packaging bag 200.

[0063] Simultaneously, the lifting seat 34 drives the rack 41 to move downwards in sync, causing the rack 41 to mesh with the drive gear 43 to rotate in the opposite direction. The gear 43 drives the driving wheel 44 to rotate in the opposite direction in sync via the transmission shaft 42. Then, through the transmission of the driving wheel 44, the transmission belt 45 and the driven wheel 411, the lead screw 49 rotates in the opposite direction. When the lead screw 49 rotates in the opposite direction, it drives the threaded sleeve 410 to move away from the bracket 1 via the threaded transmission, thereby causing the moving plate 47 to move along the limiting guide shaft 46 toward the static friction plate 416. This causes the moving friction plate 48 on the outer side of the moving plate 47 to gradually come into contact with the static friction plate 416, so that the unwinding roller 2 is locked by the frictional resistance between the moving friction plate 48 and the static friction plate 416, preventing the unwinding roller 2 and the packaging bag roll 100 from continuing to rotate and unwind due to inertia.

[0064] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0065] The preferred embodiments of the invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention.

Claims

1. A conveying structure of a traditional Chinese medicine decoction piece packaging machine, comprising a support (1), a unwinding roller (2) rotatably installed on the upper end of the support (1), and a packaging bag roll material (100) fixedly installed on the surface of the unwinding roller (2), characterized in that: The upper end of the support (1) is further provided with a tensioning mechanism (3) for guiding and limiting the packaging bags (200) on the packaging bag roll (100); the tensioning mechanism (3) comprises a tensioning roller (31), a guide roller (32) and an elastic lifting assembly, the guide roller (32) is rotatably installed on one side of the unwinding roller (2), the tensioning roller (31) is installed between the unwinding roller (2) and the guide roller (32) through the elastic lifting assembly; the support (1) is further provided with a locking mechanism (4) for locking and fixing the unwinding roller (2), and the locking mechanism (4) is in transmission connection with the tensioning roller (31), so that the tensioning roller (31) can drive the locking mechanism (4) to release the locking of the unwinding roller (2) when the tensioning roller (31) goes up; The locking mechanism (4) comprises a dynamic friction plate (48), a static friction plate (416), a translation conveying assembly and a transmission assembly, the static friction plate (416) is fixedly installed on the end of the unwinding roller (2), the dynamic friction plate (48) is installed on the support (1) through the translation conveying assembly, and the dynamic friction plate (48) is located on one side of the static friction plate (416), the translation conveying assembly is in transmission connection with the lifting seat (34) through the transmission assembly; The translation conveying assembly comprises a limiting guide shaft (46) and a lead screw (49), the limiting guide shaft (46) is fixedly installed on the support (1) and located on one side of the end of the unwinding roller (2), a moving plate (47) is slidably installed on the limiting guide shaft (46), the outer side of the moving plate (47) is fixedly installed with the dynamic friction plate (48), and the bottom of the moving plate (47) is fixedly installed with a threaded sleeve (410); the lead screw (49) is rotatably installed on the outer side of the support (1), and the lead screw (49) is in threaded transmission connection with the threaded sleeve (410); The transmission assembly comprises a rack (41), a transmission shaft (42) and a driven wheel (411), the transmission shaft (42) is rotatably installed on the outer side of the support (1), and the transmission shaft (42) is fixedly installed with a gear (43) and a driving wheel (44); one end of the rack (41) is fixedly installed on the outer side of the lifting seat (34), and the rack (41) is in meshing transmission connection with the gear (43), and the driven wheel (411) is fixedly installed on one end of the lead screw (49), and the driven wheel (411) and the driving wheel (44) are in transmission connection through a transmission belt (45); The end of the unwinding roller (2) is fixedly installed with an end plate (412), the inner side of the end plate (412) is provided with a sliding hole (414), the static friction plate (416) is slidably installed in the sliding hole (414), a connecting shaft (413) is fixedly installed on the side wall of the sliding hole (414), one end of the connecting shaft (413) is slidably inserted into the static friction plate (416), and the outer ring of the connecting shaft (413) is sleeved with a supporting spring (415) abutting against one side of the static friction plate (416); The static friction sheet (416) is provided with a slot hole corresponding to the connecting shaft (413), and the end of the connecting shaft (413) is fixedly provided with a limiting plate slidably clamped in the slot hole. When the tension roller (31) moves upward, the locking mechanism (4) can be driven to loosen the locking of the unwinding roller (2), and the tension roller (31) can be driven to tighten the loosened packaging bag (200) when the tension roller (31) moves downward, and the downward moving tension roller (31) drives the locking mechanism (4) to lock and fix the unwinding roller (2) again.

2. The conveying structure of a traditional Chinese medicine decoction piece packaging machine according to claim 1, characterized in that: The elastic lifting assembly comprises two lifting grooves (33), two lifting grooves (33) are respectively arranged at two ends of the support (1), and lifting seats (34) are slidably arranged in the two lifting grooves (33), the two ends of the tension roller (31) are rotatably connected with the two lifting seats (34), spring holes (39) are arranged at the top of the lifting grooves (33), and pressure springs (310) abutting against the top of the lifting seats (34) are arranged in the spring holes (39).

3. The conveying structure of a traditional Chinese medicine decoction piece packaging machine according to claim 2, characterized in that: A clamping block (35) is fixedly arranged on one side of the outer surface of the lifting seat (34), a pin seat (36) is fixedly arranged on one side of the lifting groove (33), a pin shaft (38) is slidably inserted into the pin seat (36), one end of the pin shaft (38) extends to one end of the slot of the lifting groove (33), and a reset spring (37) is abuttingly arranged on the other end of the pin shaft (38).

4. The conveying structure of a traditional Chinese medicine decoction piece packaging machine according to claim 3, characterized in that: The clamping block (35) is provided with a plurality of clamping blocks (35), the plurality of clamping blocks (35) are equidistantly distributed from top to bottom along the edge of the outer side of the lifting seat (34), and the spacing between adjacent clamping blocks (35) is greater than the diameter of the pin shaft (38). The clamping block (35) is provided with a plurality of clamping blocks (35), the plurality of clamping blocks (35) are equidistantly distributed from top to bottom along the edge of the outer side of the lifting seat (34), and the spacing between adjacent clamping blocks (35) is greater than the diameter of the pin shaft (38).

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