A paperboard continuous conveying system for carton production

Abstract

The application discloses a paperboard continuous conveying system for packaging box production and mainly relates to the field of unstacking and conveying technology. The paperboard continuous conveying system comprises an unstacking module, the unstacking module comprises a lifting table and a lifting frame with independent lifting strokes respectively, a lifting roller table is installed on the lifting frame, the lifting table is located above the lifting frame and is provided with a comprehensive material shifting mechanism, one side of the lifting roller table is provided with an inclined material receiving table, the material receiving table is arranged relative to one end of the shaft of a supporting roller group, the lifting roller table comprises the supporting roller group with driving force, a supporting plate is installed on the middle part of the lifting roller table and is lifted, the supporting plate has an interval rotating stroke of 90 degrees each time, the comprehensive material shifting mechanism comprises a middle mold group and a side mold group, a push rod with a horizontal material pushing stroke is arranged below the middle mold group, the side mold group comprises symmetrical friction wheels located on the two sides of the middle mold group, and the friction wheels rotate from the inner side to the direction away from the push rod respectively. The paperboard continuous conveying system has the advantages that the paperboard tray can be quickly and high-quality unstacked and conveyed, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of depalletizing and conveying technology, specifically a continuous conveying system for cardboard used in packaging box production. Background Technology

[0002] There is a close interdependence between carton production and the supply of cardboard raw materials. As the core raw material for carton production, the stability of upstream processing capacity directly affects the production efficiency and product quality of cartons. Modern carton manufacturers generally adopt automated production lines. For example, Jining Mouhong Packaging & Printing Co., Ltd. uses corrugated cardboard production lines, pre-printing production lines, and water-based printing production lines, achieving full automation from cardboard cutting and printing to carton stapling. Taking the WJ-100-1600 five-layer corrugated cardboard production line as an example, its mechanical speed can reach 100m / min, with a working speed between 60-100m / min. The cardboard supply speed of the carton packaging machine has exceeded 80 cartons / minute. This high-efficiency production line places higher demands on the supply of raw materials.

[0003] In the current cardboard supply process, the stacked cardboard on pallets must first be disassembled layer by layer. Then, forklifts or automated AGVs transfer the disassembled cardboard to a conveyor system. In highly automated workshops, the conveyor system is large and flexible, categorizing and directing the cardboard for transport. During or at the end of the conveyor, the cardboard is unpacked and transferred to a conveyor belt that connects to the automated cardboard processing equipment, achieving continuous feeding in a fish-scale pattern. The depalletizing process is the slowest in terms of production cycle and also the most difficult to automate. Automation of other processes mainly relies on the combination of conveyor equipment, the design of guide rails, and mature material handling mechanisms. However, the depalletizing process requires disassembling dozens of bundles of cardboard layer by layer on a pallet. The common stacking method is an interlaced tic-tac-toe pattern, with each two layers strictly maintaining a cross shape to form a "grid". Adjacent layers of cardboard rotate 90°, staggering like bricklaying. This structure offers the best stability but is the most challenging to depalletize.

[0004] When dealing with pallets stacked in a grid pattern, the challenge lies in the high degree of overlap. Each layer of cardboard packages is at a 90° angle to each other and interlocks in a cross shape. The seams of each layer are staggered, forming a spatial interlock. The robotic arm requires a high-precision vision system, intelligent algorithms, and complex angular adjustments to grip each package in real time to handle the complex stacking shape. Furthermore, due to the tight interlocking of the cardboard, the gripping action is complex, requiring multiple claws to work together, and is prone to damaging the cardboard. Therefore, existing automated depalletizing equipment struggles to improve depalletizing speed and frequently damages the cardboard, placing an additional burden on subsequent finished product sorting and constraining the entire upstream material supply process. Summary of the Invention

[0005] The purpose of this invention is to provide a continuous conveying system for cardboard in packaging box production, which automatically and quickly and efficiently destacking and conveying cardboard pallets, thereby improving production efficiency.

[0006] To achieve the above objectives, the present invention employs the following technical solution: A continuous conveying system for cardboard production in packaging boxes includes a destacking module. The destacking module includes a lifting platform and a lifting frame, each with an independent lifting stroke. A lifting roller table is installed on the lifting frame. The lifting platform is located above the lifting frame and is equipped with a comprehensive material feeding mechanism. A receiving platform is provided on one side of the lifting roller table. The end of the receiving platform near the lifting roller table is inclined upward. The receiving platform is set at one end relative to the axial direction of the roller group. The lifting roller table includes a roller group with driving force. A support plate is installed in the middle of the lifting roller table. The support plate has a rotation stroke of 90 degrees at intervals. The integrated material feeding mechanism includes a middle module and a side module. The middle module is centrally located above the mounting port. A pushing slide is provided below the middle module. The pushing slide has a horizontal pushing stroke relative to the axial direction of the roller group. A push rod extending downward is provided below the pushing slide. The side module includes symmetrical friction wheels located on both sides of the middle module. There are multiple friction wheels on the same side, which are distributed in a row along the axial direction of the roller group. The friction wheels rotate from the inside away from the push rod.

[0007] A feeding module is provided on one side of the destacking module. The feeding module conveys the pallet toward the lifting roller table. The feeding module's conveying direction is set in the same direction as the lifting roller table's conveying direction.

[0008] The feeding module includes a roller conveyor frame with multiple conveying rollers mounted on it. Side support frames are fixed on both sides of the track frame. The side support frames are provided with a transverse overflow slide rail and a transverse sliding screw parallel to the conveying rollers. A transverse sliding table is slidably fitted on the transverse overflow slide rail. A transverse sliding nut is fitted on the transverse sliding screw and is also fixed on the transverse sliding table. A connecting rib is provided on the transverse sliding table. A push plate is fixed at one end of the connecting rib near the roller conveyor frame. The push plate is positioned above the conveying rollers and is arranged opposite to each other based on the two sides of the roller conveyor frame.

[0009] The destacking module includes an upright support body. A first lifting module is centrally located on the upper part of the support body. The first lifting module includes a first guide rail and a first rack extending along the height direction. A first slider is slidably engaged on the first guide rail. There are multiple first sliders fixed on the lifting platform. A first gear that meshes with the first rack is rotatably mounted on the lifting platform. Two sets of second lifting modules are provided on the support body along the height direction. The second lifting module includes a second guide rail and a second rack extending along the height direction. A second slider is slidably engaged on the second guide rail. There are multiple second sliders fixed on the lifting frame. A second gear that meshes with the second rack is rotatably mounted on the lifting frame.

[0010] The lifting roller platform includes a base frame, on which the roller assembly is rotatably mounted. A transversely extending support beam is fixed to the bottom surface of the base frame. Two support beams are attached, one end of which is fixed to the lifting frame. A square mounting opening is located in the center of the base frame. A rotating seat, fixedly connected to the base frame, is located below the mounting opening. An annular frame, extending vertically through the rotating seat, is rotatably mounted on the rotating seat. A large coaxial gear ring is fixed to the bottom end of the annular frame. A rotating gear, meshing with the large gear ring, is rotatably mounted on the lower part of the base frame near the mounting opening. A guide frame is fixed above the annular frame. A sliding sleeve extends through the guide frame. A guide slide rod slides vertically within the sliding sleeve. A lifting cylinder is fixed to the center of the guide frame. A lifting cylinder rod is fitted to the top of the lifting cylinder. The top ends of the lifting cylinder rod and the guide slide rod are both fixed to a support plate.

[0011] The idler roller assembly includes side idler rollers and middle idler rollers arranged in the same direction. The middle idler rollers and / or side idler rollers are driven idler rollers. The side idler rollers are symmetrically arranged on both sides of the middle idler rollers. The width of the middle idler rollers is adapted to the width of the mounting opening. The corners of the mounting opening are provided with gaps dispersed within the idler roller assembly. The gaps are collinear with the side of the mounting opening and extend bidirectionally along the side of the mounting opening to form 8 gaps, which form a grid-like layout. The corners of the pallet are respectively provided with support rods. The support rods are collinear with the side of the pallet and extend in the same direction to form 8 support rods. When the ring frame and the pallet stop, the side of the pallet is parallel to the side of the mounting opening, and the 8 support rods are located within the 8 gaps.

[0012] The length direction of the middle module is aligned with the axial direction of the idler roller assembly. The middle module has a strip-shaped support extending in the same direction at the part away from the lifting platform. The bottom surface of the strip-shaped support is fixed with a hanging rail and a pusher screw. The nut on the pusher screw is fixed to the pusher slide, so that the pusher slide has a push stroke along the axial direction of the idler roller assembly at the center of the lifting roller platform. A quick-load bracket is fixed below the pusher slide. The bottom of the quick-load bracket has a strip-shaped hole. The strip-shaped hole is perpendicular to the axial direction of the idler roller assembly and extends horizontally. The top of the pusher rod has a reduced-diameter insert rod that passes through the strip-shaped hole. The top of the insert rod is fitted with a nut.

[0013] The side module includes a connecting beam, a side beam, and a vertical beam connected in sequence to the lifting platform. The vertical beam is located on both sides of the middle module. The bottom of the vertical beam is provided with a telescopic guide rod and a telescopic screw. The telescopic guide rod and the telescopic screw are arranged in parallel and their length direction is consistent with the conveying direction of the lifting roller table. The telescopic guide rod is fitted with a telescopic sliding sleeve fixed to the bottom of the vertical beam. The telescopic screw is fitted with a screw nut fixed to the bottom of the vertical beam. The outer ends of the telescopic guide rod and the telescopic screw are provided with an outer bracket, and the inner ends of the telescopic guide rod and the telescopic screw are provided with an inner bracket. The friction wheel is rotatably mounted on the inner bracket. Adjacent friction wheels are based on chain drive or belt drive, and one of the friction wheels is driven to rotate by a motor.

[0014] A support frame is provided below the receiving platform. A machine frame is hinged to the end of the support frame away from the lifting roller platform. A belt conveyor is installed on the machine frame. The belt conveyor has a conveyor belt. The belt surface of the conveyor belt conveys to the end away from the lifting roller platform. A swing cylinder is hinged to the support frame. A swing lever is telescopically connected to the top of the swing cylinder. The top of the swing lever is hinged to the machine frame to control the angle and swinging action of the machine frame, so that the distance between the top of the conveyor belt and the stack changes.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: This system restructures the initial stages of the cardboard feeding system. By eccentrically pushing and side-assisted feeding of the outer cardboard packages layer by layer, the outermost cardboard packages on the top layer of the stack can smoothly maintain their lateral position and fall onto the receiving platform. Combined with the 90-degree rotation of the supporting stack, the stack completes the alternation of sides, thus sequentially pushing and feeding the cardboard packages on the four sides of the top layer of the stack. This method avoids slow, multi-stage gripping actions and eliminates the need for repeated alignment and complex pick-and-place paths. The unloading time is reduced by a factor of two, ideally to 3-6 seconds, greatly accelerating the destacking and loading efficiency and effectively cooperating with high-speed carton production lines. Attached Figure Description

[0016] Figure 1This is an overall schematic diagram of the working state (with tray) of the present invention.

[0017] Figure 2 yes Figure 1 A side view diagram.

[0018] Figure 3 yes Figure 1 A front view illustration.

[0019] Figure 4 This is a schematic diagram of the material dismantling mechanism of the present invention on the outside of the stack.

[0020] Figure 5 This is a schematic diagram of the back side of the destacking module of the present invention.

[0021] Figure 6 This is a bottom schematic diagram of the destacking module of the present invention.

[0022] Figure 7 This is a schematic diagram of the destacking module and the feeding module of the present invention.

[0023] Figure 8 This is a schematic diagram showing the component breakdown of the integrated material feeding mechanism of the present invention.

[0024] Figure 9 This is a bottom schematic diagram of the disassembled lifting roller table assembly of the present invention.

[0025] Figure 10 This is a top view of the disassembled lifting roller table assembly of the present invention.

[0026] The labels shown in the attached diagram: 1. Roller conveyor frame; 2. Conveyor rollers; 3. Side support frame; 4. Transverse slide rail; 5. Transverse slide table; 6. Transverse lead screw; 7. Connecting rib; 8. Push plate; 9. First guide rail; 10. First rack; 11. First gear; 12. Lifting platform; 13. Second guide rail; 14. Second rack; 15. Second gear; 16. Lifting frame; 17. Lifting roller table; 18. Base frame; 19. Support beam; 20. Mounting port; 21. Side row idler rollers; 22. Middle row idler rollers; 23. Gap; 24. Rotating seat; 25. Circular frame; 26. Large gear ring; 27. Rotating gear; 28. 29. Guide frame; 30. Guide slide rod; 31. Lifting cylinder; 32. Support plate; 33. Support rod; 34. Middle module; 35. Strip seat frame; 36. Hanging rail; 37. Push screw; 38. Push slide table; 39. Quick-load bracket; 40. Strip hole; 41. Push rod; 42. Connecting beam; 43. Side beam; 44. Vertical beam; 45. Telescopic guide rod; 46. Telescopic screw; 47. Inner support; 48. Friction wheel; 49. Transmission wheel; 50. Drive wheel; 51. Outer support; 52. Receiving platform; 53. Support frame; 54. Machine frame; 55. Conveyor belt; 56. Swing cylinder. Detailed Implementation

[0027] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, it should be understood that after reading the teachings of this invention, those skilled in the art can make various alterations or modifications to the invention, and these equivalent forms also fall within the scope defined in this application.

[0028] Unless otherwise specified, the instruments, reagents, and materials used in the following embodiments are all conventional instruments, reagents, and materials already available in the prior art and can be obtained through legitimate commercial channels. Unless otherwise specified, the experimental methods and detection methods used in the following embodiments are all conventional experimental methods and detection methods already available in the prior art. Example

[0029] Common gripper-type robotic arms are difficult to use for depalletizing cardboard because the cardboard is easily deformed or even broken during gripping, and there is no working space between stacked cardboard packages to allow the robotic arm to insert. In cardboard depalletizing production, the KUKA robotic arm is designed to better suit the application scenario of cardboard. Its robotic gripper design is complex, with grippers on both sides, bottom, and top. However, it is difficult to insert the side grippers into complex stacking shapes like crisscross stacks, where there are gaps of 23 between the cardboard packages. Furthermore, the movements are complex, resulting in an average of only four cardboard packages being unloaded per minute, leading to low efficiency. Additionally, the cardboard is not flat at the packing straps after packaging, and padding paper is usually added between layers, making suction cup-type devices unsuitable for this scenario. Therefore, under current technology, crisscross stacks present the greatest technical challenge for depalletizing.

[0030] This design is specifically tailored to the characteristics of grid-shaped stacks, and features a completely new design for continuous cardboard feeding and conveying, achieving automatic, efficient, and low-loss destacking and feeding, thus solving the problem of feeding at the production start point.

[0031] This design is mainly embedded in the pre-feeding system and interfaces with automated feeding. The whole system includes the following parts: feeding module, delivery module, and destacking module. Among them, the destacking module is the main operation module and is also the core improvement point of this design.

[0032] The above modules are described in the order of material feeding.

[0033] (1) Feeding module As the starting point of the system, the feeding module is used to send the whole pallet to the destacking module. The feeding module adopts a roller conveyor, preferably a powered roller conveyor, which includes multiple conveyor rollers arranged in parallel.

[0034] Not limited to this example, other common conveying equipment, such as belt conveyors, can be used.

[0035] Specifically, the feeding module includes a roller conveyor frame 1, on which multiple conveying rollers 2 are mounted, and a transmission mechanism, which includes a bearing housing, a drive shaft, sprockets, chains, tension wheels, sensors, reducers, and a motor. Alignment mechanisms are provided on both sides of the roller conveyor frame 1, and each alignment mechanism includes: a side support frame 523, double transverse slide rails 4, a transverse lead screw 6, a motor, a transverse slide table, and a push plate 8.

[0036] One end of the side support frame 523 is fixed to one side of the roller conveyor frame 1. The side support frame 523 is provided with two transverse slide rails 4 parallel to the conveyor roller 2, forming a double transverse slide rail 4 structure. A transverse slider is slidably fitted on the transverse slide rail 4. The transverse slider is fixed on the transverse slide table 5. A transverse screw 6 is provided in parallel between the two transverse slide rails 4. One end of the transverse screw 6 is connected to a motor. The transverse screw 6 is driven by the motor. A transverse screw nut is fitted on the transverse screw 6. The transverse screw nut is also fixed on the transverse slide table 5. A connecting rib 7 is provided on the transverse slide table 5. A push plate 8 is fixed to the end of the connecting rib 7 near the roller conveyor frame 1.

[0037] The transverse slide 5, based on the aforementioned structure, has a horizontal transverse travel relative to the width of the roller conveyor 1, and the push plates 8 on both sides of the transverse travel can move closer or separate relative to each other, thereby centrally positioning the pallet 31 in the center of the roller conveyor 1. After the pallet enters the lifting roller table 17, its transverse direction relative to the lifting roller table 17 is also centrally positioned.

[0038] Depending on the conveying direction, the feeding module has an incoming end and an outgoing end, and the pallet is conveyed unidirectionally from the incoming end to the outgoing end on the feeding module. The destacking module is located at the outgoing end of the roller conveyor frame 1.

[0039] (2) Destacking module (2.1) Basic itinerary design The destacking module is located at the material removal end of the feeding module.

[0040] The destacking module includes a support body, which is made of steel or concrete and is fixedly installed in the production environment. A first lifting module and a second lifting module are provided on one side of the support body.

[0041] The first lifting module is centrally located on the upper part of the support body. The first lifting module includes two parallel first guide rails 9, on which first sliders are slidably fitted. Each first slider is fixed to a lifting platform 12. A first gear 11 is rotatably mounted through the lifting platform 12. The first gear 11 is driven by a first motor, which is also mounted on the lifting platform 12. A first rack 10 is provided between the two first guide rails 9, parallel to them. The first rack 10 meshes with the first gear 11, and the rotation of the gear achieves the driving and stopping of the lifting action.

[0042] The lifting platform 12 obtains its first lifting stroke based on the above structure.

[0043] The second lifting module consists of two sets, symmetrically arranged on both sides of the first lifting module. Since the second lifting module supports a pallet, a dual-set lifting auxiliary system is used for greater stability.

[0044] Each second lifting module includes two parallel second guide rails 13, with a second rack 14 between the two second guide rails 13. A second slider is slidably fitted on the second guide rails 13. It also includes a lifting frame 16, with the second slider fixed on the lifting frame 16. A second motor and a second gear 15 are also installed on the lifting frame 16. The second gear 15 and the second motor are connected in a transmission relationship, and the second gear 15 and the second rack 14 mesh to realize the lifting drive and stop of the lifting frame 16.

[0045] The lifting frame 16 obtains a second lifting stroke based on the above structure.

[0046] The first lifting stroke is based on the function of the mechanism it is loaded with, and its stroke is located in the upper part of the support, and the stroke segment is higher than the top of the second lifting stroke.

[0047] The height of the second lifting stroke covers the height of the support body.

[0048] (2.2) Functional Module - Design of Lifting Roller Table 17 The lifting frame 16 is equipped with a lifting roller table 17, which supports the lifting of pallets with stacks and provides appropriate height conditions for unstacking. The lifting roller table 17 is aligned with the feeding module in the conveying direction. After the pallet, which is centered on the feeding module, is transferred to the lifting roller table 17, it can maintain a horizontally centered state.

[0049] The lifting roller table 17 includes a base frame 18, which is a square support made of staggered steel pipes welded together. Support beams 19 are welded across the bottom of the base frame 18 on both sides. Reinforcing ribs are added to the bottom of the support beams 19. There are two support beams 19. One end of the support beam 19 is fixed to the lifting frame 16 to fix the base frame 18.

[0050] The base frame 18 has a square mounting opening 20 in the middle, and a set of idler rollers is rotatably mounted on the base frame 18.

[0051] The idler roller assembly is arranged in parallel and in the same direction as the conveyor rollers of the feeding module. The idler rollers are arranged in three rows, namely side idler rollers 21 and middle idler rollers 22. The side idler rollers 21 are symmetrically arranged on both sides of the middle idler rollers 22. The width of the middle idler rollers 22 is adapted to the width of the mounting opening 20, so that the mounting opening 20 is located in the middle of the middle idler rollers 22 and no idler rollers are installed there.

[0052] The middle row idler roller 22 is a driven idler roller. The specific structure can be selected from any existing power conveyor roller structure. The power structure is set at both ends of the roller, driven by chain transmission and powered by a motor.

[0053] A position sensor is installed on one side of the idler roller assembly to provide feedback and determine the position of the cargo pallet, thereby providing feedback on whether to stop or rotate.

[0054] Not limited to this example, power can also be added to the side rollers 21, or power can be installed only on the side rollers 21.

[0055] The corner of the mounting opening 20 is provided with gaps 23 dispersed in the roller group. The gaps 23 are collinear with the side of the mounting opening 20 and extend bidirectionally along the side of the mounting opening 20 to form 8 gaps, which form a grid-like layout.

[0056] A rotating seat 24 is centrally located below the mounting port 20 and fixedly connected to the base frame 18. A ring frame 25, which runs vertically through the rotating seat 24, is rotatably mounted on the rotating seat 24 based on a large bearing. The bottom end of the ring frame 25 is located below the rotating seat 24, and a coaxial large gear ring 26 is fixed to the bottom end of the ring frame 25. A rotating gear 27 that meshes with the large gear ring 26 is rotatably mounted on the side of the base frame 18 near the mounting port 20. A stepper motor with a reducer is also fixed below the base frame 18. The output shaft of the stepper motor is connected to the rotating gear 27 through the reducer to drive the rotation of the ring frame 25 and set the ring frame 25 to perform an interval rotation stroke, rotating 90 degrees for each rotation.

[0057] A guide frame 28 is fixed above the annular frame 25. A sliding sleeve runs through the guide frame 28, and a guide rod 29 slides vertically within the sliding sleeve. The guide rod 29 adopts a smooth rod guide rail structure. A lifting cylinder 30 is fixed in the middle of the guide frame 28, and a lifting cylinder rod is fitted at the top of the lifting cylinder 30. The top of the lifting cylinder rod and the top of the guide rod 29 are both fixed to the pallet 31. The pallet 31 is a horizontally extending square plate. The pallet 31 has a lifting stroke based on the annular frame 25, and it also has an intermittent rotation action based on the base frame 18. When the pallet 31 is raised during its lifting stroke, the top surface of the pallet 31 is higher than the top surface of the roller group. When the pallet 31 is lowered during its lifting stroke, the top surface of the pallet 31 is lower than the roller group, thereby switching the support body for the bottom surface of the pallet between the pallet 31 and the roller group.

[0058] The pallet 31 is adapted to the size of the mounting opening 20. Each corner of the pallet 31 is provided with a support rod 32. These support rods 32 are collinear with and extend in the same direction along the sides of the pallet 31, forming eight support rods 32. When the ring frame 25 and the pallet 31 are stopped, the sides of the pallet 31 are parallel to the sides of the mounting opening 20, and the eight support rods 32 are located within eight gaps 23. Since the pallet 31 and the mounting opening 20 are square, each rotation (90°) of the pallet 31 ensures that the support rods 32 align with the gaps 23, thus facilitating the unaffected lifting and lowering of the pallet 31 and support rods 32. Furthermore, the extended support rods 32 expand the support range, providing stable support for the bottom surface of the pallet.

[0059] Based on the above structure, the lifting roller table 17 can be raised and lowered. When it is lowered to the same height as the conveyor roller 2, the pallet is transferred to the lifting roller table 17 along its conveying direction and stops when it is located in the center of the lifting roller table 17. Subsequent destacking can then be performed by lifting the lifting roller table 17 to the required height.

[0060] Meanwhile, after the pallet lands on the lifting roller table 17, the support body can be switched by raising and lowering the pallet plate 31. When the pallet plate 31 is raised, it supports the pallet, and the relative position of either side of the pallet with the feeding module can be adjusted based on the rotation of the pallet plate 31. When the pallet plate 31 is lowered, the pallet is supported by the roller group.

[0061] (2.3) Functional Module - Design of Integrated Material Feeding Mechanism The lifting platform 12 of the first lifting module is fixed with a comprehensive material feeding mechanism, which adopts a combined action of eccentric pushing and side auxiliary feeding to disassemble the cardboard on each side.

[0062] The integrated material feeding mechanism includes a middle module 33 and a side module fixed on the lifting platform 12. The middle module 33 is centrally located relative to the mounting port 20 of the lifting roller platform 17 below. The side modules are two sets and are respectively located on both sides of the middle module 33.

[0063] The middle module 33 has an open structure at the bottom. The length direction of the middle module 33 is arranged in the same direction as the axial direction of the roller group. The middle module 33 has a strip-shaped support frame 34 extending in the same direction at the part away from the lifting platform 12. The bottom surface of the strip-shaped support frame 34 is fixed with a hanging rail 35 and a pusher screw 36. A pusher slide 37 is slidably fitted on the hanging rail 35. The screw nut fitted on the pusher screw 36 is fixed on the pusher slide 37, so that the pusher slide 37 has a horizontal reciprocating push stroke along the axial direction of the roller group of the lifting platform 17 at the center position relative to the lifting roller platform 17.

[0064] Below the pusher slide 37 is a quick-load bracket 38. The quick-load bracket 38 has a U-shaped structure, and its top side is fixed to the pusher slide 37 by bolts. The bottom of the quick-load bracket 38 has a strip-shaped hole 39. The length direction of the strip-shaped hole 39 is perpendicular to the middle module 33 and extends horizontally. Below the quick-load bracket 38 are multiple quick-release push rods 40. The top of each push rod 40 has a reduced-diameter insert rod that passes through the strip-shaped hole 39. The top of the insert rod is fitted with a nut to fix the insert rod to the quick-load bracket 38. The quick-load bracket 38 allows for flexible adjustment of the position of the push rods 40 and quick installation and disassembly. It is convenient to adjust the coverage of the pushing action by adjusting the number and position of the push rods 40 to adapt to the size of the central hole of the grid-shaped stacking.

[0065] During material feeding, adapting to the lattice-shaped stacking structure, the push rod 40 of the middle module 33 is positioned in the central hole of the stack through a lifting action. As the push rod 40 pushes laterally, the cardboard is pushed outward. Since the cardboard is misaligned when stacked in a lattice shape, the pushing position is eccentric, meaning the pushing position is at one end of the cardboard.

[0066] The side module includes a connecting beam 41, a side beam 42, and a vertical beam 43 that are connected to each other. The length direction of the connecting beam 41 is consistent with the conveying direction. One end of the connecting beam 41 is fixed on the lifting platform 12, and the other end of the connecting beam 41 is fixed to one end of the side beam 42. The length direction of the side beam 42 is consistent with the axial direction of the roller group. The end of the side beam 42 away from the lifting platform 12 is fixedly connected to the top of the vertical beam 43. The vertical beam 43 extends vertically downward to provide a mounting position for the actuating components and adjusts the mounting position downward to an appropriate height so that the height of the friction wheel 47 matches that of the push rod 40.

[0067] The bottom of the upright beam 43 is provided with a telescopic guide rod 44 and a telescopic lead screw 45. The telescopic guide rod 44 and the telescopic lead screw 45 are arranged side by side and their length direction is consistent with the conveying direction of the lifting roller table 17. A telescopic sliding sleeve is fitted on the telescopic guide rod 44 and is fixed to the bottom of the upright beam 43. A lead screw nut fitted on the telescopic lead screw 45 is also fixed to the bottom of the upright beam 43. An outer bracket 50 is provided at the outer end of the telescopic guide rod 44 and the telescopic lead screw 45. A motor for driving the telescopic guide rod 44 is installed on the outer bracket 50. An inner bracket 46 is provided at the inner end of the telescopic guide rod 44 and the telescopic lead screw 45. Four to ten friction wheels 47 are rotatably mounted on the inner bracket 46. The axial direction of the friction wheels 47 is vertical. The circumferential surface of the friction wheels 47 is provided with striped and raised textures to increase friction thrust. The friction wheels 47 are equidistantly arranged along the extension direction of the middle module 33. The top of each friction wheel 47 has two transmission wheels 48 along its height direction. Each transmission wheel 48 is a pulley or sprocket. A toothed belt or chain is wound between adjacent transmission wheels 48 to synchronize the rotation of adjacent friction wheels 47. A stepper motor is also mounted on the inner support 46. The output shaft of the stepper motor is connected to a drive wheel 49 via a reduction gearbox. The drive wheel 49 is connected to the transmission wheel 48 at one end via belt or chain drive, thereby driving all friction wheels 47 on the same side to rotate synchronously. The friction wheels 47 on both side modules rotate in opposite directions, both rotating from the inside away from the lifting platform 12 (e.g., ...). Figure 4 (As shown).

[0068] The inner supports 46 located on opposite sides can extend and retract horizontally, allowing the friction wheels 47 on both sides to approach or move away from the sides of the stack. If the side of the cardboard is disengaged from the friction wheels 47, the cardboard is moved away from the lifting platform 12 by the active rotation of the friction wheels 47.

[0069] The material feeding mechanism operates far away, such as Figure 4 As shown: (For ease of description, the side away from the lifting platform 12 is defined as the outside) The entire lifting platform 12 cooperates with the top layer of packing cardboard in the stack. The push rod 40 is located in the grid-like space in the center of the stack. Since each layer of packing cardboard is staggered and interlocked, when the push rod 40 moves outward in the center of the stack, it pushes the outermost packing cardboard outward eccentrically. Therefore, the packing cardboard will be pushed outward at the end located in the center of the stack due to the eccentric force, while the end of the packing cardboard located at the corner of the stack will tilt outward, thus contacting the friction wheel 47 close to the stack. It will then be pushed by the friction wheel 47 with the assistance of the friction wheel 47, and finally the outer packing cardboard is pushed out of the top layer of the stack while maintaining a roughly horizontal state.

[0070] (2.4) Design of Functional Module - Receiving Platform 51 The receiving platform 51 is located on the side of the lifting roller platform 17 away from the lifting frame 16, and the receiving platform 51 is arranged at a right angle to the feeding module.

[0071] The receiving platform 51 adopts a belt conveyor structure because the angle may change during material receiving, so the belt structure is more stable.

[0072] Below the receiving platform 51 is a support frame 52 for fixing it to the workshop floor. The length direction of the support frame 52 is in the same direction as the axial direction of the roller group. A frame 53 is hinged to the end of the support frame 52 away from the lifting roller platform 17. A belt conveyor is installed on the frame 53. The belt conveyor has a conveyor belt. The belt surface of the conveyor belt conveys to the end away from the lifting roller platform 17.

[0073] A swing cylinder 54 is hinged to the support frame 52. A swing lever is telescopically connected to the top of the swing cylinder 54. The top of the swing lever is hinged to the frame 53, controlling the angle and swing motion of the frame 53. This causes the distance between the top of the conveyor belt and the stack to change. When the frame 53 rises, the top of the conveyor belt moves away from the stack, preventing interference with the stack's rotation.

[0074] (3) Feeding module The feeding module includes a conveying device that is connected to the bottom of the belt conveyor. It can be the same type of belt conveyor or a roller conveyor. It is used to pick up the cardboard packages disassembled on the receiving platform 51 and convey them to the rear end to keep the feeding smooth. If it is a large-scale enterprise, it can be connected to the conveying system.

[0075] Not limited to this example, the feeding module can also be transported to the entrance of the conveying system using a transfer vehicle (AGV).

[0076] Based on this system, the specific actions performed and the destacking methods used are as follows: The pallet with stacks described in S1 is conveyed to the lifting roller table 17 through the feeding module. When it passes the push plate 8 during the conveying process, the push plates 8 on both sides move closer together to center and position the pallet. The pallet with stacks described in S2 is conveyed to one side of the lifting roller platform 17. The lifting roller platform 17 is lowered to cooperate with the feeding module. The roller group of the lifting roller platform 17 is coplanar with the bottom surface of the pallet. The feeding module and the active conveying of the lifting roller platform 17 are started, so that the pallet with stacks is transferred to the center position of the lifting roller platform 17. The lifting roller platform 17 carries the pallet with stacks and rises, so that the top layer of packaging cardboard cooperates with the integrated material feeding mechanism. S3 unpacks and unloads the top layer of cardboard from the stack. The specific actions and coordination methods according to the timing sequence are as follows: The top of the receiving platform 51 described in S3.1 is close to the bottom side of the top layer of the packing cardboard of the stack; S3.2 The side module is lowered, so that the push rod 40 is inserted into the grid hole in the center of the stack. The bottom end of the push rod 40 is not lower than the bottom side of the top packing cardboard. The friction wheel 47 is located on both sides of the top packing cardboard and is set outward (as shown in the figure, the friction wheel 47 is located on the outside of the stack and protrudes from the stack, so as to achieve outward assistance and pushing on a longer path). S3.3 The pusher slide 37 is moved outward, driving the pusher rod 40 to push the packaging cardboard located on the outer side of the stack from the center of the stack. At the same time, the friction wheel 47 on the same side as the pushed cardboard is started to rotate, assisting in pushing the cardboard outward on the wide side of the pushed cardboard. The pusher rod 40 and the friction wheel 47 work together to push the top layer of packaging cardboard located on the outer side of the stack to the top of the receiving platform 51. The conveyor belt on the receiving platform 51 is in a conveying state. When the conveyor belt contacts the bottom surface of the pushed packaging cardboard, it further assists the outward push of the cardboard in the same direction, so that the packaging cardboard located on the outer side of the top layer of the stack, which is arranged horizontally, falls smoothly onto the conveyor belt and is conveyed to the rear end by the conveyor belt, completing one pusher action. Each time a material bag is pushed down, more than one pushing action is performed. During the above actions, the friction wheel 47 approaches both sides of the stack. When the outer packaging cardboard is pushed by the push rod 40, the cardboard tilts slightly and comes into contact with the friction wheel 47, thereby assisting in the pushing.

[0077] S3.4 Lifting platform 12 rises, driving the side module and middle module 33 to rise synchronously. Push rod 40 and friction wheel 47 move away from the stack and are located above the stack. Receiving platform 51 swings upward and lifts 3-8 degrees, so that the top of receiving platform 51 is at a distance from the stack that allows the stack to rotate. S3.5 The pallet 31 is lifted so that the pallet 31 replaces the roller group to support the bottom of the pallet. After the pallet 31 rotates 90 degrees, it falls down so that the other side of the pallet falls outward onto the lifting roller table 17. Repeat steps S3.1-S3.3 above to complete the pushing of the outer cardboard; Repeat steps S3.4-S3.5 above, rotating the stack by 90 degrees; Repeat steps S3.1-S3.3 above to complete the pushing of the outer cardboard; Repeat steps S3.4-S3.5 above, rotating the stack by 90 degrees; Repeat steps S3.1-S3.3 above to push the outer cardboard and complete the destacking of one layer; The lifting roller table 17 rises (the rising height corresponds to the thickness of a cardboard package), so that the top layer of the stack cooperates with the integrated material feeding mechanism, and the bottom side of the top layer of the stack is adapted to the top position of the receiving table 51. Repeat step S3 above to unload the stack layer by layer from top to bottom.

Claims

1. A continuous cardboard conveying system for packaging box production, characterized in that, The system includes a destacking module, which comprises a lifting platform and a lifting frame, each with an independent lifting stroke. A lifting roller table is installed on the lifting frame, and the lifting platform is located above the lifting frame and is equipped with a comprehensive material feeding mechanism. A receiving platform is provided on one side of the lifting roller table. The end of the receiving platform near the lifting roller table is inclined upward. The receiving platform is set at one end relative to the axial direction of the roller group. The lifting roller table includes a roller group with driving force. A support plate is installed in the middle of the lifting roller table. The support plate has a rotation stroke of 90 degrees at intervals. The integrated material feeding mechanism includes a middle module and a side module. The middle module is centrally located above the mounting port. A pushing slide is provided below the middle module. The pushing slide has a horizontal pushing stroke relative to the axial direction of the roller group. A push rod extending downward is provided below the pushing slide. The side module includes symmetrical friction wheels located on both sides of the middle module. There are multiple friction wheels on the same side, which are distributed in a row along the axial direction of the roller group. The friction wheels rotate from the inside away from the push rod.

2. The continuous conveying system for cardboard production for packaging boxes according to claim 1, characterized in that, A feeding module is provided on one side of the destacking module. The feeding module conveys the pallet toward the lifting roller table. The feeding module's conveying direction is set in the same direction as the lifting roller table's conveying direction.

3. A continuous cardboard conveying system for packaging box production according to claim 2, characterized in that, The feeding module includes a roller conveyor frame with multiple conveying rollers mounted on it. Side support frames are fixed on both sides of the track frame. The side support frames are provided with a transverse overflow slide rail and a transverse sliding screw parallel to the conveying rollers. A transverse sliding table is slidably fitted on the transverse overflow slide rail. A transverse sliding nut is fitted on the transverse sliding screw and is also fixed on the transverse sliding table. A connecting rib is provided on the transverse sliding table. A push plate is fixed at one end of the connecting rib near the roller conveyor frame. The push plate is positioned above the conveying rollers and is arranged opposite to each other based on the two sides of the roller conveyor frame.

4. A continuous cardboard conveying system for packaging box production according to claim 1, characterized in that, The destacking module includes an upright support body. A first lifting module is centrally located on the upper part of the support body. The first lifting module includes a first guide rail and a first rack extending along the height direction. A first slider is slidably engaged on the first guide rail. There are multiple first sliders fixed on the lifting platform. A first gear that meshes with the first rack is rotatably mounted on the lifting platform. Two sets of second lifting modules are provided on the support body along the height direction. The second lifting module includes a second guide rail and a second rack extending along the height direction. A second slider is slidably engaged on the second guide rail. There are multiple second sliders fixed on the lifting frame. A second gear that meshes with the second rack is rotatably mounted on the lifting frame.

5. A continuous cardboard conveying system for packaging box production according to claim 1, characterized in that, The lifting roller platform includes a base frame, on which the roller assembly is rotatably mounted. A transversely extending support beam is fixed to the bottom surface of the base frame. Two support beams are attached, one end of which is fixed to the lifting frame. A square mounting opening is located in the center of the base frame. A rotating seat, fixedly connected to the base frame, is located below the mounting opening. An annular frame, extending vertically through the rotating seat, is rotatably mounted on the rotating seat. A large coaxial gear ring is fixed to the bottom end of the annular frame. A rotating gear, meshing with the large gear ring, is rotatably mounted on the lower part of the base frame near the mounting opening. A guide frame is fixed above the annular frame. A sliding sleeve extends through the guide frame. A guide slide rod slides vertically within the sliding sleeve. A lifting cylinder is fixed to the center of the guide frame. A lifting cylinder rod is fitted to the top of the lifting cylinder. The top ends of the lifting cylinder rod and the guide slide rod are both fixed to a support plate.

6. A continuous cardboard conveying system for packaging box production according to claim 5, characterized in that, The idler roller assembly includes side idler rollers and middle idler rollers arranged in the same direction. The middle idler rollers and / or side idler rollers are driven idler rollers. The side idler rollers are symmetrically arranged on both sides of the middle idler rollers. The width of the middle idler rollers is adapted to the width of the mounting opening. The corners of the mounting opening are provided with gaps dispersed within the idler roller assembly. The gaps are collinear with the side of the mounting opening and extend bidirectionally along the side of the mounting opening to form 8 gaps, which form a grid-like layout. The corners of the pallet are respectively provided with support rods. The support rods are collinear with the side of the pallet and extend in the same direction to form 8 support rods. When the ring frame and the pallet stop, the side of the pallet is parallel to the side of the mounting opening, and the 8 support rods are located within the 8 gaps.

7. A continuous cardboard conveying system for packaging box production according to claim 1, characterized in that, The length direction of the middle module is aligned with the axial direction of the idler roller assembly. The middle module has a strip-shaped support extending in the same direction at the part away from the lifting platform. The bottom surface of the strip-shaped support is fixed with a hanging rail and a pusher screw. The nut on the pusher screw is fixed to the pusher slide, so that the pusher slide has a push stroke along the axial direction of the idler roller assembly at the center of the lifting roller platform. A quick-load bracket is fixed below the pusher slide. The bottom of the quick-load bracket has a strip-shaped hole. The strip-shaped hole is perpendicular to the axial direction of the idler roller assembly and extends horizontally. The top of the pusher rod has a reduced-diameter insert rod that passes through the strip-shaped hole. The top of the insert rod is fitted with a nut.

8. A continuous cardboard conveying system for packaging box production according to claim 1, characterized in that, The side module includes a connecting beam, a side beam, and a vertical beam connected in sequence to the lifting platform. The vertical beam is located on both sides of the middle module. The bottom of the vertical beam is provided with a telescopic guide rod and a telescopic screw. The telescopic guide rod and the telescopic screw are arranged in parallel and their length direction is consistent with the conveying direction of the lifting roller table. The telescopic guide rod is fitted with a telescopic sliding sleeve fixed to the bottom of the vertical beam. The telescopic screw is fitted with a screw nut fixed to the bottom of the vertical beam. The outer ends of the telescopic guide rod and the telescopic screw are provided with an outer bracket, and the inner ends of the telescopic guide rod and the telescopic screw are provided with an inner bracket. The friction wheel is rotatably mounted on the inner bracket. Adjacent friction wheels are based on chain drive or belt drive, and one of the friction wheels is driven to rotate by a motor.

9. A continuous cardboard conveying system for packaging box production according to claim 1, characterized in that, A support frame is provided below the receiving platform. A machine frame is hinged to the end of the support frame away from the lifting roller platform. A belt conveyor is installed on the machine frame. The belt conveyor has a conveyor belt. The belt surface of the conveyor belt conveys to the end away from the lifting roller platform. A swing cylinder is hinged to the support frame. A swing lever is telescopically connected to the top of the swing cylinder. The top of the swing lever is hinged to the machine frame to control the angle and swinging action of the machine frame, so that the distance between the top of the conveyor belt and the stack changes.

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