Multi-class material counting and bagging apparatus

Abstract

The application discloses a multi-class material counting and bagging equipment, which comprises a workbench, a unwinding assembly and a material guiding assembly. The unwinding assembly comprises a support fixedly arranged on the workbench, a cantilever arranged on the support, and a unwinding drum rotatably arranged on the upper end of the support. A driving roller is rotatably arranged on the cantilever. The equipment further comprises two swing arms rotatably connected to the two ends of the driving roller, a friction roller rotatably arranged between the two swing arms, and a hot sticking plate fixedly arranged on the cantilever. The friction roller has a first position rotatably supported on the cantilever and a second position abutting against the hot sticking plate at the two ends of the swing range of the swing arm. When the friction roller is at the second position, the remaining part of the old plastic belt is retained on the friction roller, and a part of the new plastic belt unwound from the unwinding drum is close to the hot sticking plate to be clamped between the friction roller and the hot sticking plate. The hot sticking plate heats the overlapping part of the new and old plastic belts to be bonded, thereby greatly facilitating the continuous feeding of the plastic belt.

Description

Technical Field

[0001] This invention relates to the field of bagging equipment technology, and specifically to a bagging equipment for counting multiple types of materials. Background Technology

[0002] In industrial production, there are situations where multiple types of materials are packaged together in a certain quantity ratio. Existing multi-material bagging technology can basically meet the daily needs, but there are still some shortcomings that need to be improved.

[0003] Patent document CN103434688A, published on December 11, 2013, discloses an automatic counting and packaging machine for plastic tubes. The machine includes a feeding device, a conveying device, a packaging device, a power distribution box, and a controller. A counting device is connected between the outlet of the feeding device and the inlet of the conveying device. The counting device includes a linear conveying channel, an infrared monitoring device, and a discharge device. The infrared monitoring device is positioned above the outlet of the counting device. The discharge device includes an inclined guide chute and a discharge gate. A screening element is provided at the outlet of the feeding device. The feeding device is a vibrating feeding disc with an internal spiral trough. A filter notch is provided between the upper end of the spiral trough and the screening element. The entire machine automatically and orderly conveys plastic tubes one by one to the counting device, automatically counts them, and then conveys them to a hopper, where they are placed into formed plastic bags. A horizontal sealing device seals and cuts the bags. The entire system operates continuously and automatically, improving production efficiency, thereby reducing production costs and bringing better economic benefits.

[0004] In the prior art of the aforementioned patent, after the plastic strip is unwound, it needs to be fitted onto the material tube in a limiting manner for receiving materials and packaging. During this process, the direction and posture of the plastic strip are restricted by the gaps between the material tube and its various components. As a result, after each roll of plastic strip is used up, it is necessary to re-insert the plastic strip into the gaps, which is extremely difficult to operate. Therefore, there is an urgent need for a multi-material counting and bagging device to solve the above problems. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-material counting and bagging device to overcome the above-mentioned shortcomings in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A multi-material counting and bagging device includes a worktable, an unwinding assembly, and a guiding assembly. The unwinding assembly is located on one side of the worktable, and the guiding assembly is located below the unwinding assembly. The unwinding assembly includes a support fixedly mounted on the worktable, a cantilever mounted on the support, an unwinding drum rotatably mounted on the upper end of the support, and a drive roller rotatably mounted on the cantilever. It also includes: two swing arms rotatably connected to both ends of the drive roller; a friction roller rotatably mounted between the two swing arms, forming a gap between them for unwinding the plastic strip from the unwinding drum; and a heat-sealing plate fixedly mounted on the cantilever. The friction roller has a first position rotatably supported on the cantilever and a second position abutting against the heat-sealing plate at both ends of the swing range of the swing arms.

[0008] Preferably, the cantilever end is provided with a groove, and the upper surface near the heat-sealing plate is provided with an elastic protrusion.

[0009] Preferably, the heat-adhesive plate is provided with a groove that matches the friction roller, and the inner wall of the groove is provided with a heating layer.

[0010] Preferably, a serrated blade is movably provided at the lower end of the heat-applying plate, and a pressure clamp is raised and lowered on the side away from the friction roller. The plastic strip passes around the lower end of the heat-applying plate and then connects to the pressure clamp. A linkage component between the serrated blade and the pressure clamp is provided inside the heat-applying plate. During the upward movement of the pressure clamp, the serrated blade first extends into the bottom of the groove and remains there. As the pressure clamp rises to near its highest position, the serrated blade retracts again.

[0011] Preferably, the linkage component includes a linkage member movably disposed within the heat-applied plate, the lower end of the linkage member being fixedly connected to the serrated blade, a linkage groove being provided on the linkage member, a linkage pin being movably disposed within the linkage groove, and the linkage pin being fixedly connected to the pressure clamp via a slider slidably connected within the heat-applied plate.

[0012] Preferably, a drive assembly is provided on one side of the cantilever. The drive assembly has a first mode when the friction roller enters the first position and a second mode when the friction roller enters the second position. In the first mode, the drive assembly directly and independently drives the drive roller to rotate. In the second mode, the drive assembly first independently drives the pressure clamp to rise, and after the pressure clamp rises to the highest position, it then independently drives the drive roller to rotate.

[0013] Preferably, the drive assembly includes a switching shaft rotatably mounted on a cantilever, and the switching shaft is connected to a drive roller via a bevel gear transmission.

[0014] Preferably, the switching shaft is elastically axially movable, and a synchronously moving displacement block is sleeved on the switching shaft. One end of the displacement block movably passes through the inner side of the cantilever. A cam that abuts against the displacement block is provided at one end of the swing arm connected to the drive roller. A take-up and release wheel is also sleeved on the switching shaft. The take-up and release wheel releases a pull rope and passes around a pulley set on the heat-adhesive plate to connect to the upper end of the pressure clamp. A clutch wheel is provided on the switching shaft. The surfaces of the clutch wheel and the take-up and release wheel are both provided with damping grooves and can rotate synchronously when they are in contact. The switching shaft can switch between independently controlling the rotation of the drive roller or the take-up and release wheel by axial movement.

[0015] Preferably, the displacement block is provided with a reset groove, the heat-adhesive plate is elastically raised and lowered with a reset rod corresponding to the reset groove, and the heat-adhesive plate is provided with a limiting component for limiting the movement of the reset rod. The limiting component cancels the limiting when the slider rises to the highest position.

[0016] Preferably, the limiting component includes a lever that rotates elastically within the heat-sealing plate, a trigger rod movably connected to the upper end of the lever, the trigger rod being movably connected within the heat-sealing plate and extending to the range of slider lifting at the end away from the lever, a limiting member movably connected to the lower end of the lever, the limiting member being movably connected within the heat-sealing plate, and a limiting hole matching the limiting member provided on the reset rod.

[0017] In the above technical solution, the beneficial effects of the present invention are:

[0018] This multi-material counting and bagging equipment features a heat-sealing plate and a swing arm capable of rotating a friction roller. When the friction roller is in the first position, the plastic strip is normally conveyed between the drive roller and the friction roller. When the friction roller is in the second position, the remaining portion of the old plastic strip remains on the friction roller, while a portion of the new plastic strip is unwound from the unwinding drum and placed close to the heat-sealing plate to be clamped between the friction roller and the heat-sealing plate. At this time, the heat-sealing plate heats and bonds the overlapping portion of the old and new plastic strips, while the drive roller rotates again to automatically feed the new plastic strip following the old one, greatly facilitating the continuous feeding of plastic strips.

[0019] It should be understood that the foregoing general description and the following detailed description are exemplary and illustrative only, and are not intended to limit this disclosure.

[0020] This application provides an overview of various implementations or examples of the technology described in this disclosure, and is not a full disclosure of the entire scope or all features of the disclosed technology. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0022] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0023] Figure 2 Provided for embodiments of the present invention Figure 1 Enlarged structural diagram at point A;

[0024] Figure 3 This is a schematic diagram of the overall structure from another perspective, provided for an embodiment of the present invention.

[0025] Figure 4 Provided for embodiments of the present invention Figure 3 Enlarged structural diagram at point B;

[0026] Figure 5 This is a schematic diagram of the internal component structure of the cantilever and heat-applied plate provided in an embodiment of the present invention;

[0027] Figure 6 This is a side cross-sectional view of the unwinding assembly linkage provided in an embodiment of the present invention.

[0028] Figure 7 Provided for embodiments of the present invention Figure 6 Enlarged structural diagram at point C;

[0029] Figure 8 This is a side cross-sectional view of the unwinding assembly reset rod provided in an embodiment of the present invention.

[0030] Figure 9 Provided for embodiments of the present invention Figure 8 Enlarged structural diagram at point D;

[0031] Figure 10 This is a top view cross-sectional structural diagram of the unwinding assembly provided in an embodiment of the present invention;

[0032] Figure 11 Provided for embodiments of the present invention Figure 10 A magnified structural diagram at point E in the middle.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Workbench; 2. Support frame; 3. Cantilever; 4. Unwinding drum; 5. Drive roller; 6. Swing arm; 7. Friction roller; 8. Heat-applying plate; 9. Groove; 10. Elastic protrusion; 11. Recess; 12. Heating layer; 13. Serrated blade; 14. Pressure clamp; 15. Linkage component; 16. Linkage groove; 17. Linkage pin; 18. Slider; 19. Switching shaft; 20. Displacement block; 21. Cam; 22. Take-up and unwinding wheel; 23. Pull rope; 24. Pulley; 25. Clutch wheel; 26. Reset groove; 27. Reset rod; 28. Lever; 29. ​​Trigger rod; 30. Limiting component; 31. Limiting hole. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0036] Please see Figure 1-11 This invention provides a multi-material counting and bagging device, including a workbench 1, an unwinding assembly, and a guiding assembly. The unwinding assembly is located on one side of the workbench 1, and the guiding assembly is located below the unwinding assembly. The unwinding assembly includes a support 2 fixedly mounted on the workbench 1, a cantilever 3 mounted on the support 2, an unwinding drum 4 rotatably mounted on the upper end of the support 2, and a drive roller 5 rotatably mounted on the cantilever 3. It also includes: two swing arms 6 rotatably connected to the two ends of the drive roller 5; a friction roller 7 rotatably mounted between the two swing arms 6, with a gap between them for unwinding the plastic strip from the unwinding drum 4; and a heat-sealing plate 8 fixedly mounted on the cantilever 3. The friction roller 7 has a first position rotatably supported on the cantilever 3 and a second position abutting against the heat-sealing plate 8 at both ends of the swing range of the swing arms 6.

[0037] Specifically, the workbench 1 is equipped with multiple vibrating discs for conveying different types of materials. These discs convey materials through the same collection hopper to the material guiding assembly. The material guiding assembly includes a guide pipe with multiple rings arranged from top to bottom. A plastic belt smoothly passes through the gap between the outer wall of the guide pipe and the inner side of the rings. The support 2 includes two vertically parallel, spaced-apart straight plates and a support plate that extends obliquely or horizontally away from the workbench 1 at the upper end of the straight plates. The unwinding drum 4 is axially horizontal and supported at the ends of the two support plates. Arm 3 extends from support 2 away from worktable 1; unwinding drum 4 is used to unwind plastic strip; unwinding drum 4 is detachable and replaceable on support 2; drive roller 5 is axially parallel to unwinding drum 4, and drive roller 5 is equipped with at least two damping wheels, which are symmetrically and evenly arranged; swing arm 6 is parallel to and close to cantilever 3, and the rotation range of the friction roller 7 driven by swing arm 6 is on the side of drive roller 5 away from worktable 1; friction roller 7 and drive roller 5 cooperate to rub and squeeze the plastic strip passing through the gap, and then under the rolling of drive roller 5... The plastic strip is unwound; the heat-sealing plate 8 is parallel to the drive roller 5 and vertically arranged; the heat-sealing plate 8 can be heated under the control of the servo system, and the plastic strip adheres under hot pressure. The surface of the heat-sealing plate 8 is smooth and does not stick to the plastic strip, or an anti-stick coating is applied to the surface of the heat-sealing plate 8; the horizontal width of both the friction roller 7 and the heat-sealing plate 8 is greater than the width of the plastic strip; during the normal unwinding process of the plastic strip, the swing arm 6 carries the friction roller 7 to the first position. In this position, the plastic strip passing through the gap between the drive roller 5 and the friction roller 7 is kept in place. When the plastic strip needs to be reconnected, the swing arm 6 carries the friction roller 7 to the second position. In this position, the remaining part of the old plastic strip is still clamped and retained in the gap between the drive roller 5 and the friction roller 7. Then, the new plastic strip partially overlaps with the old one and is clamped between the friction roller 7 and the heat plate 8. The friction roller 7 switches from the first position to the second position, that is, the swing arm 6 rotates upward and moves closer to the heat plate 8. Conversely, the friction roller 7 switches from the second position to the first position, that is, the swing arm 6 rotates downward and moves away from the heat plate 8. In practical use, when the plastic strip needs to be spliced, the remaining part of the old plastic strip is first held in the gap between the drive roller 5 and the friction roller 7. Then, a new unwinding drum 4 is replaced, and one end of the new plastic strip is unwound and attached to the heat-sealing plate 8. At the same time, the swing arm 6 is rotated, which drives the friction roller 7 to switch from the first position to the second position. The friction roller 7 then attaches to the heat-sealing plate 8 to press the old and new plastic strips together synchronously. The old and new plastic strips overlap, so on the one hand, the heat-sealing plate 8 heats the overlapping part of the old and new plastic strips to make them bond, and on the other hand, the drive roller 5 rotates so that the new plastic strip follows the old plastic strip and is automatically fed, which greatly facilitates the splicing of plastic strips.

[0038] Compared with the prior art, the multi-material counting and bagging equipment proposed in this embodiment of the invention, by setting a heat-adhesive plate 8 and with the function of the swing arm 6 carrying the friction roller 7 to rotate, allows the plastic strip to be normally conveyed between the drive roller 5 and the friction roller 7 when the friction roller 7 is in the first position. When the friction roller 7 is in the second position, on the one hand, the remaining part of the old plastic strip is retained on the friction roller 7, and on the other hand, a portion of the new plastic strip is unwound from the unwinding drum 4 and placed close to the heat-adhesive plate 8 so that it can be clamped between the friction roller 7 and the heat-adhesive plate 8. At this time, the heat-adhesive plate 8 heats the overlapping part of the new and old plastic strips to bond them together, and on the other hand, the drive roller 5 rotates again so that the new plastic strip follows the old plastic strip and is automatically fed, which greatly facilitates the feeding of plastic strips.

[0039] As a preferred technical solution in this embodiment, the end of the cantilever 3 is provided with a groove 9, and the upper surface near the heat-sealing plate 8 is provided with an elastic protrusion 10. Specifically, the end of the rotating shaft of the friction roller 7 is embedded in the groove 9 to obtain support and is in the first position; the rotating shaft of the friction roller 7 rotates to squeeze through the elastic protrusion 10 and is limited by the elastic protrusion 10 so that it abuts against the heat-sealing plate 8, and is in the second position; in addition, the friction roller 7 can also be limited by magnetic attraction without affecting the rotation of the friction roller 7.

[0040] As a preferred technical solution in this embodiment, the heat-bonding plate 8 is provided with a groove 11 that matches the friction roller 7. The inner wall of the groove 11 is provided with a heating layer 12. Specifically, the inner wall of the groove 11 is arc-shaped. Thus, when the friction roller 7 is in the second position, the friction roller 7 is embedded in the groove 11 to press down more of the overlapping surface of the new and old plastic strips, ensuring the initial bonding stability. The heating layer 12 heats the inner wall of the groove 11 to soften the plastic strip within the bonding temperature range. The heating layer 12 is controlled by a servo system.

[0041] In another embodiment of the present invention, a serrated blade 13 is movably disposed at the lower end of the heat-contact plate 8, while a pressure clamp 14 is vertically disposed on the side away from the friction roller 7. The plastic strip passes around the lower end of the heat-contact plate 8 and then connects to the pressure clamp 14. A linkage assembly between the serrated blade 13 and the pressure clamp 14 is disposed inside the heat-contact plate 8. During the upward movement of the pressure clamp 14, the serrated blade 13 first extends into the bottom of the groove 11 and remains there. As the pressure clamp 14 rises to near its highest position, the serrated blade 13 retracts again. Specifically, the serrated blade 13 is horizontally and horizontally movable, and its tooth extension direction is parallel to the axial direction of the friction roller 7. The tooth tip height of the serrated blade 13 is not less than twice the plastic strip thickness. The material has a single-layer thickness; the serrated blade 13 is heated together with the heating layer 12; the pressure clamp 14 is used to clamp the unwinding end of the plastic strip in parallel, so that the plastic strip automatically approaches the heat-sealing plate 8; under the linkage component setting, the linkage relationship between the serrated blade 13 and the pressure clamp 14 is as follows: when the pressure clamp 14 starts to rise, the serrated blade 13 moves closer to the groove 11 in linkage; when the pressure clamp 14 continues to rise, the serrated blade 13 remains inserted into the groove 11; when the serrated blade 13 rises to near the highest point, the serrated blade 13 moves away from the groove 11 in linkage; the lower end of the groove 11 is set at the horizontal tangent point of the arc, and the lower end of the groove 11 is chamfered, and the serrated blade 13 extends or retracts at the chamfered point. In actual use, when the new plastic strip is unwound and clamped between the friction roller 7 and the heat-sealing plate 8, in order to ensure that the new plastic strip is clamped, the length of the end of the new plastic strip usually exceeds the range of the groove 11. This causes the new plastic strip to be unable to bond with the old plastic strip, which in turn causes problems such as snagging or blockage when passing through the gap on the tube.The principle of this technical solution is as follows: After the new plastic strip is replaced, one end of it is unwound and extended to an appropriate length. Then, it is wrapped around the lower end of the heat-sealing plate 8 and fixed parallel to the pressure clamp 14. Then, a portion of the old plastic strip is retained on the friction roller 7, and the position is switched from the first position to the second position so that the old and new plastic strips are pressed onto the inner wall of the groove 11 simultaneously, and the old and new plastic strips overlap. Then, the overlapping portion of the plastic strip is heated in the groove 11 to gradually bond together. Then, the pressure clamp 14 rises, which drives the end of the new plastic strip to rise. At this time, the friction roller 7 does not rotate, so the portion of the plastic strip clamped in the groove 11 does not move. At this time, under the action of the linkage component, the serrated blade 13 rises initially to extend into the groove 11 and pierce into the overlapping plastic strip. Since the serrated blade 13 is with the heating layer 12 As the temperature rises, the serrated blade 13 forms continuous point-like weld points on the overlapping plastic layers through its tooth tips. Simultaneously, as the pressure clamp 14 continues to rise, the plastic strip passing around the lower end of the heat-sealing plate 8 gradually tightens. Consequently, at the weld point, the end of the new plastic strip remains separated from the old plastic strip and moves closer to the root of the serrated blade 13, resulting in a wider range of shearing. This part of the new plastic strip end is cut off and leaves the groove 11 with the pressure clamp 14 until the pressure clamp 14 rises to its highest point. The serrated blade 13 then retracts to avoid the groove 11, and the drive roller 5 rotates, causing the friction roller 7 to rotate as well. This allows the new plastic strip to automatically feed along with the old plastic strip, and the overlapping parts of the new and old plastic strips adhere to each other after passing through the groove 11. This eliminates the problem of some new plastic strips not adhering to the old plastic strip.

[0042] As a preferred technical solution in this embodiment, the linkage component includes a linkage member 15 movably disposed within the heat-contact plate 8. The lower end of the linkage member 15 is fixedly connected to the serrated blade 13. A linkage groove 16 is provided on the linkage member 15, and a linkage pin 17 is movably disposed within the linkage groove 16. The linkage pin 17 is fixedly connected to the pressure clamp 14 via a slider 18 slidably connected within the heat-contact plate 8. Specifically, the linkage member 15 is horizontally slidably disposed within the heat-contact plate 8. Inclined sections are provided at both the upper and lower ends of the linkage groove 16, and the ends of the inclined sections are both positioned close to the groove 11. A sliding groove matching the slider 18 is provided within the heat-contact plate 8. The slider 18 only drives the linkage pin 17 to move up and down, thereby driving the linkage member 15 to move horizontally via the linkage groove 16.

[0043] In another embodiment of the present invention, a drive assembly is provided on one side of the cantilever 3. The drive assembly has a first mode when the friction roller 7 enters the first position and a second mode when the friction roller 7 enters the second position. In the first mode, the drive assembly directly and independently drives the drive roller 5 to rotate. In the second mode, the drive assembly first independently drives the pressure clamp 14 to rise, and after the pressure clamp 14 rises to its highest position, it then independently drives the drive roller 5 to rotate. Specifically, the first mode and the second mode of the drive assembly correspond to the first position and the second position of the friction roller 7, respectively, which exactly correspond to the actual working state of the friction roller 7. In the first mode, the drive roller 5 is driven to rotate independently, that is, the drive roller 5 and the friction roller 7 at the first position normally convey the plastic strip. In the second mode, the drive assembly first independently drives the pressure clamp 14 to rise, that is, the heat-adhesive plate 8 and the friction roller 7 at the second position first press the overlapping plastic strips, and the pressure clamp 14 rises to the highest position, so as to cut and separate the excess plastic strip with the linkage saw blade 13. Then the drive assembly independently drives the drive roller 5 to rotate, and the drive roller 5 and the friction roller 7 cooperate to make the new plastic strip follow the old plastic strip for automatic feeding, and the overlapping part of the new and old plastic strips are bonded after passing through the groove 11.

[0044] As a preferred technical solution in this embodiment, the drive assembly includes a switching shaft 19 rotatably mounted on the cantilever 3. The switching shaft 19 is connected to the drive roller 5 via a bevel gear transmission. Specifically, a servo motor is also mounted on the cantilever 3. The servo motor is connected to the switching shaft 19 via a spur gear transmission, and the axial distance of the active spur gear covers the movable range of the passive spur gear on the switching shaft 19. The axial movement of the switching shaft 19 can control whether or not it is connected to the drive roller 5 via the bevel gear transmission.

[0045] As a preferred embodiment, the switching shaft 19 is axially movable and has a synchronously moving displacement block 20 fitted on it. One end of the displacement block 20 extends through the inner side of the cantilever 3. The end of the swing arm 6 connected to the drive roller 5 is provided with a cam 21 that abuts against the displacement block 20. The switching shaft 19 is also fitted with a take-up and release wheel 22. The take-up and release wheel 22 releases a pull rope 23 and passes around a pulley 24 on the heat-sealing plate 8 to connect to the upper end of the pressure clamp 14. The switching shaft 19 is provided with a clutch wheel 25. The surfaces of the clutch wheel 25 and the take-up and release wheel 22 are both provided with damping grooves and can rotate synchronously when they are in contact. The switching shaft 19 can switch between independently controlling the rotation of the drive roller 5 or the take-up and release wheel 22 by axial movement. Specifically, a transmission chamber is provided on the cantilever 3, and the switching shaft 19 is rotatably mounted inside the transmission chamber. A ring is fitted onto the end of the switching shaft 19 away from the drive roller 5. A spring is provided on the side of the ring away from the drive roller 5, and the spring is fitted onto the outside of the switching shaft 19, with its two ends abutting against the inner wall of the transmission chamber and the ring, respectively. The elastic force of the spring causes the switching shaft 19 to tend to move, thus separating it from the drive roller 5. The displacement block 20 is limited by a driven spur gear and a convex ring on the switching shaft 19 to move axially synchronously with the switching shaft 19 without affecting its rotation. When the swing arm 6 carries the friction roller 7 into the first position, the cam 21 abuts against the displacement block 20 at its maximum outer diameter position. When the friction roller 7 enters the second position, the cam 21 corresponds to the displacement block 20 at its smallest outer diameter position. During the transition from the first position to the second position, the outer diameter of the cam 21 corresponding to the displacement block 20 gradually decreases, and vice versa. The cam 21 is positioned on the side of the displacement block 20 closest to the drive roller 5. The take-up and release wheel 22 is rotatably mounted inside the transmission chamber. Two pulleys 24 are preferably located on the back side of the heat-contact plate 8 away from the groove 11 and close to the upper end of the heat-contact plate 8. The pull rope 23 is made of a soft material, has a fixed length, and is difficult to stretch. The take-up and release wheel 22 winds up the pull rope 23, thus driving the pressure clamp 14 upwards; the take-up and release wheel 22 unwinds the pull rope 23, thus lowering the pressure clamp 14. The clutch wheel 25 is positioned on the side of the take-up and release wheel 22 away from the groove 11. On one side of the drive roller 5, at both ends of the axial movement of the switching shaft 19, the transmission connection between the switching shaft 19 and the drive roller 5 occurs independently, or the damped synchronous rotation of the clutch wheel 25 and the take-up and release wheel 22 occurs independently. When the swing arm 6 carries the friction roller 7 into the first position, that is, the cam 21 abuts against the displacement block 20 with its maximum outer diameter, the switching shaft 19 moves axially to a position away from the drive roller 5, and the switching shaft 19 independently drives the drive roller 5 at this time. When the swing arm 6 carries the friction roller 7 into the second position, that is, the cam 21 corresponds to the displacement block 20 with its minimum outer diameter, the switching shaft 19 moves axially to a position close to the drive roller 5 under elastic force, and the switching shaft 19 independently drives the take-up and release wheel 22 at this time.

[0046] As a preferred technical solution in this embodiment, the displacement block 20 is provided with a reset groove 26, and the heat-adhesive plate 8 is elastically raised and lowered with a reset rod 27 corresponding to the reset groove 26. The heat-adhesive plate 8 is provided with a limiting component for limiting the movement of the reset rod 27. The limiting component is released when the slider 18 rises to the highest position. Specifically, the upper end of the reset rod 27 is pushed downward by elastic force, preferably by a spring. The inner wall of the reset groove 26 away from the cam 21 is wedge-shaped with the lower end of the reset rod 27. When the limitation on the reset rod 27 is released, the reset rod 27 moves down quickly to insert into the reset groove 26 and wedge-shaped compression occurs, so that the displacement block 20 moves away from the drive roller 5. At the same time, the reset rod 27 remains inserted into the reset groove 26 so that the displacement block 20 is kept away from the drive roller 5. At this time, the displacement block 20 drives the switching shaft 19 to move axially to independently drive the drive roller 5. A first lever that slides through the heat-adhesive plate 8 is fixedly provided on the reset rod 27 for actively restoring the reset rod 27 to the limited position.

[0047] As a preferred technical solution in this embodiment, the limiting component includes a lever 28 that rotates elastically within the heat-sealing plate 8. A trigger rod 29 is movably connected to the upper end of the lever 28. The trigger rod 29 is movably connected within the heat-sealing plate 8, and its end away from the lever 28 extends into the lifting range of the slider 18. A limiting member 30 is movably connected to the lower end of the lever 28. The limiting member 30 is movably connected within the heat-sealing plate 8. A limiting hole 31 matching the limiting member 30 is provided on the reset rod 27. Specifically, the lever 28 is elastically rotated near its middle position within the heat-sealing plate 8, preferably connected by a torsion spring. Both the trigger rod 29 and the limiting member 30 slide horizontally. The trigger rod 29 corresponds to the highest position of the lifting range of the slider 18, and its end extends into the groove and is shaped like a shovel to engage with the slider. 18. Wedge fit; thus, when the pressure clamp 14 and slider 18 rise to the highest position, the trigger rod 29 can be squeezed. The trigger rod 29 moves to move away from the limiting hole 31 through the lever 28 and the linkage limiting member 30. Thus, the limitation on the reset rod 27 is removed, and the reset rod 27 can move downward quickly. The pressure clamp 14 is provided with a second lever. After the plastic belt is connected, the swing arm 6 is pulled down to make the friction roller 7 return to the first position. Then the second lever is pushed down to make the pressure clamp 14 descend to restore the lowest height. At this time, the rotation of the take-up and release wheel 22 does not affect the switching shaft 19. Then the first lever is pushed up to make the reset rod 27 return to the limited position. The limiting member 30 can automatically reset and be embedded in the limiting hole 31 under the elastic force of the lever 28.

[0048] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A multi-material counting and bagging device, comprising a worktable (1), an unwinding assembly, and a guiding assembly, wherein the unwinding assembly is disposed on one side of the worktable (1), and the guiding assembly is disposed below the unwinding assembly; the unwinding assembly comprises a bracket (2) fixedly disposed on the worktable (1), a cantilever (3) disposed on the bracket (2), an unwinding drum (4) rotatably disposed at the upper end of the bracket (2), and a drive roller (5) rotatably disposed on the cantilever (3), characterized in that, Also includes: Two swing arms (6) are rotatably connected to both ends of the drive roller (5); The friction roller (7) is rotatably disposed between the two swing arms (6), and a gap is formed between them for unwinding the plastic strip through the unwinding drum (4); The heat-adhesive plate (8) is fixedly mounted on the cantilever (3), and the friction roller (7) has a first position on the cantilever (3) and a second position on the heat-adhesive plate (8) at both ends of the swing range of the swing arm (6). The heat-adhesive plate (8) is provided with a groove (11) that matches the friction roller (7), and a heating layer (12) is provided on the inner wall of the groove (11). A serrated blade (13) is movably provided at the lower end of the heat-contact plate (8), and a pressure clamp (14) is raised and lowered on the side away from the friction roller (7). The plastic strip passes around the lower end of the heat-contact plate (8) and is connected to the pressure clamp (14). A linkage component between the serrated blade (13) and the pressure clamp (14) is provided inside the heat-contact plate (8). During the process of the pressure clamp (14) rising, the serrated blade (13) first extends into the bottom of the groove (11) and stays there. During the process of the pressure clamp (14) rising to near the highest position, the serrated blade (13) retracts again. The linkage component includes a linkage member (15) that is movably disposed within the heat-contact plate (8). The lower end of the linkage member (15) is fixedly connected to the serrated blade (13). A linkage groove (16) is provided on the linkage member (15). A linkage pin (17) is movably disposed within the linkage groove (16). The linkage pin (17) is fixedly connected to the pressure clamp (14) through a slider (18) that is slidably connected within the heat-contact plate (8).

2. The multi-material counting and bagging equipment according to claim 1, characterized in that, The cantilever (3) has a groove (9) at its end, and an elastic protrusion (10) is provided on its upper surface near the heat-sealing plate (8).

3. The multi-material counting and bagging equipment according to claim 1, characterized in that, A drive assembly is provided on one side of the cantilever (3). The drive assembly has a first mode when the friction roller (7) enters the first position and a second mode when the friction roller (7) enters the second position. In the first mode, the drive assembly directly and independently drives the drive roller (5) to rotate. In the second mode, the drive assembly first independently drives the pressure clamp (14) to rise, and after the pressure clamp (14) rises to the highest position, it then independently drives the drive roller (5) to rotate.

4. The multi-material counting and bagging equipment according to claim 3, characterized in that, The drive assembly includes a switching shaft (19) rotatably mounted on a cantilever (3), and the switching shaft (19) is connected to the drive roller (5) via a bevel gear transmission.

5. The multi-material counting and bagging equipment according to claim 4, characterized in that, The switching shaft (19) can move axially elastically. A displacement block (20) that moves synchronously is sleeved on the switching shaft (19). One end of the displacement block (20) moves through the inner side of the cantilever (3). A cam (21) that abuts against the displacement block (20) is provided at one end of the swing arm (6) that connects to the drive roller (5). A take-up and release wheel (22) is also sleeved on the switching shaft (19). The take-up and release wheel (22) releases the pull rope (23) and passes around the pulley (24) set on the heat-sealing plate (8) to connect to the upper end of the pressure clamp (14). A clutch wheel (25) is provided on the switching shaft (19). The surfaces of the clutch wheel (25) and the take-up and release wheel (22) are both provided with damping grooves and can rotate synchronously when they are in contact. The switching shaft (19) can switch to independently control the rotation of the drive roller (5) or the take-up and release wheel (22) by axial movement.

6. The multi-material counting and bagging equipment according to claim 5, characterized in that, The displacement block (20) is provided with a reset groove (26), and the heat-adhesive plate (8) is provided with a reset rod (27) corresponding to the reset groove (26) in an elastic lifting manner. The heat-adhesive plate (8) is provided with a limiting component for limiting the movement of the reset rod (27). The limiting component cancels the limit when the slider (18) rises to the highest position.

7. The multi-material counting and bagging equipment according to claim 6, characterized in that, The limiting component includes a lever (28) that rotates elastically within the heat-sealing plate (8). A trigger rod (29) is movably connected to the upper end of the lever (28). The trigger rod (29) is movably connected within the heat-sealing plate (8), and one end away from the lever (28) extends into the lifting range of the slider (18). A limiting member (30) is movably connected to the lower end of the lever (28). The limiting member (30) is movably connected within the heat-sealing plate (8). A limiting hole (31) matching the limiting member (30) is provided on the reset rod (27).

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