Paperboard collecting and counting dual-purpose device

Abstract

The invention relates to the technical field of corrugated paper production equipment, in particular to a paperboard collecting and counting dual-purpose device which comprises an upper air suction counting mechanism, a differential conveying mechanism and a stacking mechanism which are sequentially arranged in the paperboard conveying direction, and the upper air suction counting mechanism is used for counting paperboards and comprises a platform vehicle wall, a vacuum conveying platform and an upper air suction assembly; the differential conveying mechanism is used for increasing the conveying speed of a preset number of paperboards and comprises a transition conveying platform and a climbing conveying platform. The stacking mechanism is used for stacking and discharging a preset number of paperboards and comprises a stacking rack, a stacking conveying platform installed on the stacking rack and a paper pressing swing belt assembly arranged on the stacking conveying platform. According to the paperboard collecting and counting dual-purpose device, efficient and accurate stacking and neat stacking of paperboards are achieved, the manual intervention cost is remarkably reduced, and the production efficiency and the product quality are improved.

Description

Technical Field

[0001] This invention relates to the field of corrugated paper production equipment technology, and in particular to a dual-purpose device for counting and receiving paperboard. Background Technology

[0002] A typical corrugated paper printing production line consists of a paper feeding unit, multiple printing units, a slotting unit, and a die-cutting unit. These units work in a coordinated manner under the power and transmission systems to complete a series of processing operations, including paper feeding, printing, slotting, and die-cutting of the corrugated paperboard. Simultaneously, after the corrugated paper is slit into the required dimensions by a paper slitter, it is usually first counted and divided using a counting machine. The divided corrugated paper is then bundled into stacks, which are then transported to a palletizer for stacking.

[0003] Traditional counting machines mostly use mechanical contact counting or photoelectric induction counting. Mechanical contact counting is prone to errors due to uneven cardboard surfaces or fluctuations in conveyor speed, while photoelectric induction counting is easily affected by cardboard color, reflectivity, and dusty environments, leading to misjudgments and missed counts. Furthermore, the counted cardboard needs to be manually or transported to the palletizer using separate conveyor equipment. During this process, the cardboard is prone to shifting and uneven stacking, increasing manual intervention costs and reducing overall production efficiency.

[0004] In existing technologies, some integrated paper receiving and counting devices suffer from poor speed matching at the paperboard conveying connection. When the paperboard enters the palletizing mechanism from the counting mechanism, the inconsistent conveying speeds can easily cause collisions and wrinkles, especially for thinner paperboards or those with printed patterns, which can easily damage the product and affect its quality. Furthermore, existing palletizing mechanisms typically rely on the natural weight of the paperboards during stacking. For a preset number of paperboard groups, it is difficult to achieve precise temporary storage and release control, resulting in uneven edges on the stacked paperboards. This requires additional manual finishing processes, further restricting the continuity of automated production. Summary of the Invention

[0005] In order to address the technical deficiencies mentioned in the background art, the present invention aims to provide a dual-purpose cardboard receiving and counting device, which solves the problems of large counting errors, low efficiency of manual transfer, uneven cardboard stacking, and easy damage in existing palletizing equipment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A dual-purpose cardboard collecting and counting device includes an upper suction counting mechanism, a differential speed conveying mechanism, and a stacking mechanism arranged sequentially along the cardboard conveying direction. The upper suction counting mechanism is used to count cardboard, and includes a platform wall, a vacuum conveying platform and an upper suction assembly. The two ends of the vacuum conveying platform are rotatably connected to the platform wall through bearing seats, and one end of the vacuum conveying platform is inclined upward along the cardboard conveying direction. The upper suction assembly is connected between the platform wall and the vacuum conveying platform and is in communication with the vacuum conveying platform. The differential conveying mechanism is used to pull the paperboard at a preset speed. It includes a transition conveying platform and an inclined conveying platform. The transition conveying platform is equipped with multiple sets of paper pressing roller assemblies. The two ends of the multiple sets of paper pressing roller assemblies are connected to the transition conveying platform. The inclined conveying platform is connected between the transition conveying platform and the palletizing mechanism. Both the inclined conveying platform and the vacuum conveying platform adopt the vacuum adsorption conveying method. The palletizing mechanism is used to stack and unload a preset number of cardboard pieces. It includes a palletizing frame, a palletizing conveyor platform mounted on the palletizing frame, and a paper-pressing swing belt assembly mounted on the palletizing conveyor platform. A gantry frame is provided on the outside of the palletizing frame, and a lifting drive mechanism is connected between the gantry frame and the palletizing mechanism to drive the palletizing mechanism to move up and down. A double-pole buffer assembly is provided below the palletizing conveyor platform to receive the cardboard and transfer it for unloading. One end of the paper-pressing swing belt assembly is inclined downward along the cardboard conveying direction and contacts the palletizing conveyor platform. A swing drive mechanism is connected between the paper-pressing swing belt assembly and the palletizing frame to drive the inclined end of the paper-pressing swing belt assembly to swing up and down to temporarily store or release the cardboard.

[0007] Preferably, the paper output end of the palletizing mechanism is provided with a lateral alignment mechanism for aligning and straightening the two sides of the palletized cardboard. The lateral alignment mechanism includes a transverse moving frame arranged parallel to the cardboard conveying direction, a three-axis moving assembly connected to the transverse moving frame and moving in the X / Y / Z directions, and a lateral baffle fixedly connected to the three-axis moving assembly. The transverse moving frame is slidably connected to the palletizing machine frame, and a rear baffle is provided at the end of the transverse moving frame away from the palletizing mechanism. The three-axis moving assembly is slidably connected to the transverse moving frame, and the three-axis moving assembly is fixedly connected to the lateral baffle.

[0008] Preferably, the upper suction assembly includes a suction fan, an air duct, and a suction pipe. The suction fan is fixedly connected to the top of the platform vehicle wall and communicates with the air duct. The air duct is horizontally fixed to the platform vehicle wall. The suction pipes are equidistantly arranged on the air duct, with one end of the suction pipe communicating with the air duct and the other end communicating with the vacuum conveying platform.

[0009] Preferably, the paper pressing roller assembly includes a sliding frame and multiple sets of paper pressing rollers evenly arranged on the sliding frame. The sliding frame is driven by gears and racks meshing with the top two sides of the transition conveying platform. A blower pipe is provided on the sliding frame and is placed horizontally above the transition conveying platform. The blower nozzle of the blower pipe faces one side of the transition conveying platform. The multiple sets of paper pressing rollers are fixed on the sliding frame along the paperboard conveying direction. The outer surface of each set of paper pressing rollers is in contact with the surface of the transition conveying platform.

[0010] Preferably, the paper feeding end of the vacuum conveying platform, the transition conveying platform, and the inclined conveying platform is provided with a paper feeding spring assembly. The paper feeding spring assembly includes a mounting frame, multiple sets of paper pressing springs, and a locking handle. The mounting frame is horizontally positioned above the cardboard. One end of the multiple sets of paper pressing springs is inclined upward to form a cardboard inlet and is fixed to the mounting frame by the locking handle. The other end abuts against the surface of the vacuum conveying platform, the transition conveying platform, and the inclined conveying platform.

[0011] Preferably, the paper-pressing oscillating belt assembly consists of a paper-pressing bracket, a paper-pressing roller shaft, and a paper-pressing driven wheel. The two side bracket plates of the paper-pressing bracket are hinged to the palletizing machine frame. The paper-pressing roller shaft and the paper-pressing driven wheel are located at both ends of the paper-pressing bracket, and a paper-pressing conveyor belt is sleeved between the paper-pressing roller shaft and the paper-pressing driven wheel. One end of the paper-pressing roller shaft is connected to a paper-pressing drive motor via a pulley and a synchronous belt.

[0012] Preferably, the dual-insertion rod buffer assembly includes an auxiliary support frame, a double-layer temporary insertion rod frame, and an insertion rod sliding seat. The auxiliary support frame is fixedly connected to the palletizing machine frame and is correspondingly arranged between the double-layer temporary insertion rod frames. The double-layer temporary insertion rod frame is composed of multiple equally spaced parallel insertion rods, and one end of the double-layer temporary insertion rod frame is slidably connected to the insertion rod sliding seat. The insertion rod sliding seat is fixed to the palletizing machine frame, and a slide rail is provided at the bottom of the insertion rod sliding seat, the slide rail extending along the extension direction of the double-layer temporary insertion rod frame.

[0013] Preferably, the swing drive mechanism includes a crossbeam, a hook plate, and a swing cylinder. The crossbeam is horizontally arranged at one inclined end of the paper-pressing swing belt assembly, and both ends of the crossbeam are fixedly connected to the palletizer frame. One end of the hook plate is vertically fixed to the crossbeam, and the other end is fixedly connected to the paper-pressing swing belt assembly. The swing cylinder is fixed to the crossbeam via a hinge seat, and the output end of the swing cylinder is drively connected to the paper-pressing swing belt assembly.

[0014] Preferably, the lifting drive mechanism includes a hydraulic cylinder, a lifting rack, and a synchronous shaft transmission assembly. The hydraulic cylinder is installed inside the gantry frame, and its output end is connected to the palletizing mechanism via a sprocket assembly. The lifting rack is symmetrically distributed on both side walls of the gantry frame and extends axially along the height direction of the gantry frame. The synchronous shaft transmission assembly consists of a synchronous rotating shaft and a transmission gear. The synchronous rotating shaft is laterally rotatably connected to the palletizing frame and is located above the paper-pressing swing belt assembly. The transmission gear is rotatably installed at both ends of the synchronous rotating shaft and meshes with the lifting rack.

[0015] Preferably, multiple sets of lateral limiting components are provided between the outer wall of the palletizing frame and the gantry frame. The lateral limiting components include limiting seats and limiting wheels. The limiting seats are fixedly connected to the outer side of the palletizing frame by bolts. At least two limiting wheels are provided. The two limiting wheels are threadedly connected to the limiting seats, and the outer side of the limiting wheels abuts against the side wall of the gantry frame.

[0016] In summary, the beneficial effects of the present invention are as follows: This invention achieves accurate counting of cardboard through an upward suction counting mechanism and ensures stable cardboard transport using a vacuum adsorption conveying method. A differential speed conveying mechanism can pull apart a preset number of cardboards at a set speed, facilitating subsequent stacking operations. The stacking mechanism, through the coordinated work of a paper-pressing swing belt assembly, a double-insertion rod buffer assembly, and a lateral alignment mechanism, achieves neat stacking and efficient feeding of cardboard. The coordinated operation of these components enables fully automated operation of the entire process from counting, sorting, conveying to stacking, effectively solving problems such as large errors in traditional counting methods, low efficiency of manual handling, uneven cardboard stacking, and susceptibility to damage. It significantly improves the automation level and efficiency of cardboard receiving and stacking, reduces manual labor intensity, meets the processing needs of different cardboard specifications, and thus comprehensively enhances the automation level and product quality of corrugated paper production's back-end processing. Attached Figure Description

[0017] Figure 1 This is an overall assembly drawing of the paperboard receiving and counting dual-purpose device of the present invention; Figure 2 This is a top view of the paperboard collection and counting dual-purpose device of the present invention; Figure 3 This is a schematic diagram of the structure of the upper suction point counting mechanism in the present invention from the front side. Figure 4 This is a schematic diagram of the structure of the upper suction point counting mechanism in the rear direction of the present invention; Figure 5 This is a half-sectional view of the upper suction point counting mechanism in this invention; Figure 6 This is a schematic diagram of the transition conveying platform in this invention; Figure 7This is a half-sectional view of the transition conveying platform in this invention; Figure 8 This is a schematic diagram of the inclined conveyor platform in this invention; Figure 9 This is a half-sectional view of the inclined conveyor platform in this invention; Figure 10 This is a schematic diagram of the palletizing mechanism in this invention; Figure 11 This is a half-sectional view of the palletizing mechanism in this invention; Figure 12 This is a schematic diagram of the internal components of the palletizing mechanism in this invention.

[0018] Explanation of the reference numerals in the figure: 1. Upper suction point counting mechanism; 11. Platform wall; 12. Vacuum conveying platform; 13. Upper suction assembly; 131. Suction fan; 132. Air duct; 133. Extraction pipe; 2. Differential conveyor mechanism; 21. Transition conveyor platform; 22. Inclined conveyor platform; 3. Palletizing mechanism; 31. Palletizing frame; 32. Palletizing conveyor platform; 33. Paper pressing oscillating belt assembly; 331. Paper pressing bracket; 332. Paper pressing roller shaft; 333. Paper pressing driven wheel; 334. Paper pressing conveyor belt; 335. Paper pressing drive motor; 34. Lateral limiting assembly; 341. Limiting seat; 342. Limiting wheel; 4. Paper pressing roller assembly; 41. Sliding frame; 42. Paper pressing roller; 43. Air blowing pipe; 5. Gantry frame; 6. Lifting drive mechanism; 61. Hydraulic cylinder; 62. Lifting rack; 63. Synchronous shaft transmission assembly; 631. Synchronous rotating shaft; 632. Transmission gear; 7. Double insertion rod buffer assembly; 71. Auxiliary support frame; 72. Double-layer temporary insertion rod frame; 73. Insertion rod sliding seat; 8. Swing drive mechanism; 81. Crossbeam frame; 82. Hook plate; 83. Swing cylinder; 9. Lateral alignment mechanism; 91. Lateral moving frame; 92. Three-axis moving assembly; 93. Lateral baffle; 94. Rear baffle; 10. Paper feed spring assembly; 101. Mounting bracket; 102. Paper pressing spring; 103. Locking handle. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention are within the scope of protection of the present invention.

[0020] Those skilled in the art should understand that, in the disclosure of this invention, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting this invention.

[0021] In the description of this invention, the use of terms such as "a number" means one or more, with "more than" meaning two or more. Terms like "greater than," "less than," and "exceeding" are understood to exclude the stated number, while terms like "above," "below," and "within" are understood to include the stated number. The use of terms like "first," "second," and "third" is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, the number of indicated technical features, or the sequential relationship between indicated technical features.

[0022] The following is in conjunction with the appendix Figure 1-12 The embodiments of the paperboard receiving and counting dual-purpose device of the present invention will be described in further detail below.

[0023] A dual-purpose cardboard collecting and counting device, such as Figure 1 , 2 As shown in Figure 10, it includes an upper suction counting mechanism 1, a differential speed conveying mechanism 2, and a palletizing mechanism 3 arranged sequentially along the cardboard conveying direction; wherein, The upper suction counting mechanism 1 is used to count cardboard, including a platform wall 11, a vacuum conveying platform 12, and an upper suction assembly 13. The two ends of the vacuum conveying platform 12 are rotatably connected to the platform wall 11 through bearing seats, and one end of the vacuum conveying platform 12 is inclined upward along the cardboard conveying direction. The upper suction assembly 13 is connected between the platform wall 11 and the vacuum conveying platform 12 and is in communication with the vacuum conveying platform 12. The differential conveying mechanism 2 is used to pull the paperboard at a preset speed. It includes a transition conveying platform 21 and an inclined conveying platform 22. The transition conveying platform 21 is equipped with multiple sets of paper pressing roller assemblies 4. The two ends of the multiple sets of paper pressing roller assemblies 4 are connected to the transition conveying platform 21 for transmission. The inclined conveying platform 22 is connected between the transition conveying platform 21 and the palletizing mechanism 3. Both the inclined conveying platform 22 and the vacuum conveying platform 12 adopt the vacuum adsorption conveying method. The palletizing mechanism 3 is used to stack and unload a preset number of cardboards. It includes a palletizing frame 31, a palletizing conveyor platform 32 mounted on the palletizing frame 31, and a paper-pressing swing belt assembly 33 mounted on the palletizing conveyor platform 32. A gantry frame 5 is provided on the outside of the palletizing frame 31. A lifting drive mechanism 6 is connected between the gantry frame 5 and the palletizing mechanism 3 to drive the palletizing mechanism 3 to move up and down. A double-pole buffer assembly 7 is provided below the palletizing conveyor platform 32 to receive the cardboard and transfer it for unloading. One end of the paper-pressing swing belt assembly 33 is inclined downward along the cardboard conveying direction and contacts the palletizing conveyor platform 32. A swing drive mechanism 8 is connected between the paper-pressing swing belt assembly 33 and the palletizing frame 31 to drive the inclined end of the paper-pressing swing belt assembly 33 to swing up and down to temporarily store or release the cardboard.

[0024] Specifically, in actual operation, after the preceding printing, die-cutting, and waste removal processes, the cardboard is conveyed to the upper suction counting mechanism 1 for counting. The counted cardboard then enters the differential conveyor mechanism 2. The differential conveyor mechanism 2 adjusts the conveying speeds of the transition conveyor platform 21 and the subsequent inclined conveyor platform 22 to create a certain gap between this stack of cardboard and the subsequent cardboard. After passing through the differential conveyor mechanism 2, the cardboard enters the palletizing mechanism 3. At this time, under the action of the oscillating drive mechanism 8, the inclined end of the paper-pressing oscillating belt assembly 33 contacts the surface of the palletizing conveyor platform 32, forming an inclined conveying channel. The cardboard is conveyed to the palletizing conveyor platform 32 under the vacuum adsorption of the inclined conveyor platform 22 and continues to move forward. When the preset stacking quantity is reached, the swing drive mechanism 8 drives the inclined end of the paper-pressing swing belt assembly 33 to swing upward, separating it from the surface of the palletizing conveyor platform 32. The cardboard then loses its forward driving force and begins to fall under its own gravity. The double-insertion rod buffer assembly 7 extends in advance to accurately catch the falling cardboard and stack it. After stacking is completed, the double-layer temporary storage insert rod frame 72 retracts along the slide rail, placing the neatly stacked cardboard in the preset position or on the conveyor equipment, completing one palletizing and unloading process.

[0025] In this embodiment, as Figure 3 , 5As shown, the upper suction assembly 13 includes a suction fan 131, an air duct 132, and a suction pipe 133. The suction fan 131 is fixedly connected to the top of the platform wall 11 and communicates with the air duct 132. The air duct 132 is horizontally fixed to the platform wall 11. The suction pipes 133 are equidistantly arranged on the air duct 132, with one end of the suction pipe 133 communicating with the air duct 132 and the other end communicating with the vacuum conveying platform 12. The negative pressure generated by the suction fan 131 is evenly distributed to each suction pipe 133 through the air duct 132, and then the negative pressure is introduced into the internal cavity of the vacuum conveying platform 12 by the suction pipes 133. This equidistant arrangement design ensures that the adsorption force of the vacuum conveying platform 12 is evenly distributed, ensuring that cardboard at different positions can be stably adsorbed.

[0026] Specifically, the platform wall 11 provides stable support for the entire mechanism, and the vacuum conveying platform 12 is rotatably connected through a bearing seat. Its upward tilted design at one end helps the cardboard to form a good posture in the initial stage of conveying. When the cardboard passes through the vacuum conveying platform 12, the suction force generated by the upper suction component 13 not only ensures that the cardboard is flatly adsorbed on the conveying surface at its bottom, preventing it from slipping or shifting during inclined conveying, but also, multiple photoelectric detectors and airflow sensors are installed on the top of the vacuum conveying platform 12. Through precise control and monitoring of the adsorption airflow (e.g., in combination with airflow sensors or photoelectric detectors working together), each passing cardboard can be accurately counted, achieving a highly efficient and accurate counting function.

[0027] In this embodiment, as Figure 6 As shown, the pressure roller assembly 4 includes a sliding frame 41 and multiple sets of pressure rollers 42 evenly arranged on the sliding frame 41. The sliding frame 41 is driven by gears and racks meshing on both sides of the top of the transition conveyor platform 21. An air pipe 43 is mounted on the sliding frame 41, positioned horizontally above the transition conveyor platform 21, with its air outlet facing one side of the transition conveyor platform 21. The multiple sets of pressure rollers 42 are fixed to the sliding frame 41 along the paperboard conveying direction, with the outer surface of each set of pressure rollers 42 contacting the surface of the transition conveyor platform 21. The gear and rack transmission allows the sliding frame 41 to move smoothly along the width of the transition conveyor platform 21, thereby adjusting the position of the pressure rollers 42 to accommodate paperboards of different widths.

[0028] Specifically, the sliding frame 41 of the pressure roller assembly 4 is driven by a servo motor and moves along the guide rails on both sides of the transition conveyor platform 21 to a position matching the width of the cardboard (for example, for a 1200mm wide cardboard, the sliding frame 41 is positioned 150mm from the edge). The axis of the pressure roller 42 is inclined at a 3° angle to the surface of the transition conveyor platform 21, applying a contact pressure of 0.3MPa to the cardboard. During the cardboard conveying process, the pressure roller 42 applies a certain pressure to the cardboard through its own rotation to prevent the cardboard from bouncing or wrinkling during high-speed conveying. The air blowing pipe 43 blows clean air onto the surface of the cardboard when it enters the transition conveyor platform 21, which can effectively remove dust, paper scraps and other impurities from the surface of the cardboard; avoid impurities affecting the subsequent counting accuracy and stacking quality, and also prevent impurities from accumulating on the conveyor platform and affecting the normal operation of the equipment.

[0029] In this embodiment, as Figure 5-9 As shown, the paper feeding end of the vacuum conveying platform 12, the transition conveying platform 21, and the inclined conveying platform 22 is provided with a paper feeding spring assembly 10. The paper feeding spring assembly 10 includes a mounting frame 101, multiple sets of paper pressing springs 102, and a locking handle 103. The mounting frame 101 is horizontally positioned above the cardboard. One end of the multiple sets of paper pressing springs 102 is inclined upward to form a cardboard inlet and is fixed to the mounting frame 101 by the locking handle 103. The other end abuts against the surface of the vacuum conveying platform 12, the transition conveying platform 21, and the inclined conveying platform 22.

[0030] Specifically, the mounting frame 101 provides a stable mounting base for the paper-pressing spring, and the locking handle 103 can adjust the tilt angle of the paper-pressing spring and the contact force with the conveyor platform surface according to the thickness of the cardboard. When the cardboard enters the conveyor platform, the upward tilting inlet of the paper-pressing spring guides the cardboard smoothly into the platform, preventing the front end of the cardboard from tilting up or getting stuck. The other end, which abuts against the surface of the conveyor platform, applies slight pressure during the cardboard conveying process, ensuring that the cardboard fits tightly against the conveyor surface and preventing the cardboard from shifting due to airflow or changes in conveying speed, further improving the stability of the conveying process. The inclination angle of the inclined conveyor platform 22 is set at 12°, and several vacuum adsorption holes are evenly distributed on the conveyor belt on its surface. The vacuum adsorption holes are arranged in a matrix to ensure that the cardboard does not slip during the incline process.

[0031] In this embodiment, as Figure 10-12 As shown, the paper pressing swing belt assembly 33 consists of a paper pressing bracket 331, a paper pressing roller shaft 332, and a paper pressing driven wheel 333. The two side support plates of the paper pressing bracket 331 are hinged to the palletizer frame 31. The paper pressing roller shaft 332 and the paper pressing driven wheel 333 are located at both ends of the paper pressing bracket 331, and a paper pressing conveyor belt 334 is sleeved between the paper pressing roller shaft 332 and the paper pressing driven wheel 333. One end of the paper pressing roller shaft 332 is connected to a paper pressing drive motor 335 through a pulley and a synchronous belt.

[0032] Specifically, the paper-pressing drive motor 335 drives the paper-pressing roller shaft 332 to rotate via a pulley and a synchronous belt, which in turn drives the paper-pressing conveyor belt 334 to operate. The hinged design on both sides of the paper-pressing bracket 331 allows the entire assembly to swing around the hinge point. After the cardboard enters the palletizing mechanism 3, it is first received by the palletizing conveyor platform 32. One end of the paper-pressing swing belt assembly 33 is inclined downward and contacts the palletizing conveyor platform 32. In the initial state, the inclined end is in contact with the surface of the palletizing conveyor platform 32 or maintains a small gap, allowing the cardboard to pass smoothly. When it is necessary to temporarily store the cardboard, the swing drive mechanism 8 drives the inclined end of the paper-pressing swing belt assembly 33 to swing downward, and the paper-pressing conveyor belt 334 contacts the surface of the palletizing conveyor platform 32. Under the action of the conveying force, the cardboard is temporarily clamped on the palletizing conveyor platform 32 by the paper-pressing conveyor belt 334. When it is necessary to release the cardboard for stacking, the swing drive mechanism 8 drives the inclined end of the paper-pressing swing belt assembly 33 to swing upward, releasing the clamping of the cardboard. The cardboard falls onto the double-insertion rod buffer assembly 7 under the action of gravity. The operating speed of the paper pressing conveyor belt 334 can be matched with the speed of the palletizing conveyor platform 32 to ensure a smooth transition of the paperboard during temporary storage and release, and to avoid paper jams or damage to the paperboard.

[0033] In this embodiment, as Figure 10 , 11 As shown, due to the height difference between the palletizing conveyor platform 32 and the unloading area, cardboard is prone to overturning, shifting, or unevenness during unloading. Therefore, a double-pole buffer assembly 7 is installed below the palletizing conveyor platform 32. The double-pole buffer assembly 7 includes an auxiliary support frame 71, a double-layer temporary storage pole frame 72, and a pole sliding seat 73. The auxiliary support frame 71 is fixedly connected to the palletizing machine frame 31 and is correspondingly arranged between the double-layer temporary storage pole frames 72. The double-layer temporary storage pole frame 72 is composed of multiple equally spaced poles, and one end of the double-layer temporary storage pole frame 72 is slidably connected to the pole sliding seat 73. The pole sliding seat 73 is fixed to the palletizing machine frame 31, and a slide rail is provided at the bottom of the pole sliding seat 73, which extends along the extension direction of the double-layer temporary storage pole frame 72.

[0034] Specifically, when cardboard falls from the palletizing conveyor platform 32, the double-layer temporary storage insert rod frame 72 extends outward along the slide rail via the insert rod sliding seat 73. The upper insert rod receives the falling cardboard, while the auxiliary support frame 71 reinforces the upper insert rod, preventing it from bending or deforming due to excessive force. Once the preset number of falling cardboards is reached, the upper temporary storage insert rod frame retracts, allowing the stacked cardboard to fall onto the lower temporary storage insert rod frame. The lower temporary storage insert rod frame then retracts to transfer the cardboard to the unloading area. This double-layer design allows one set of insert rod frames to transfer cardboard while the other set continues to receive new cardboard, achieving continuity in cardboard receiving and transfer, and improving palletizing efficiency. The equidistant arrangement of the insert rods ensures uniform force on the cardboard during the receiving process, preventing bending or damage.

[0035] In this embodiment, as Figure 10 As shown, the swing drive mechanism 8 includes a crossbeam frame 81, a hook plate 82, and a swing cylinder 83. The crossbeam frame 81 is horizontally arranged at one inclined end of the paper pressing swing belt assembly 33, and both ends of the crossbeam frame 81 are fixedly connected to the palletizer frame 31. One end of the hook plate 82 is vertically fixed to the crossbeam frame 81, and the other end is fixedly connected to the paper pressing swing belt assembly 33. The swing cylinder 83 is fixed to the crossbeam frame 81 through a hinge seat, and the output end of the swing cylinder 83 is connected to the paper pressing swing belt assembly 33 for transmission.

[0036] Specifically, the crossbeam frame 81 provides a stable mounting platform for the entire swing drive mechanism 8, while the hook plate 82 connects the paper-pressing swing belt assembly 33 to the crossbeam frame 81, ensuring structural stability during the swing process. The swing cylinder 83 serves as the power source; its extension and retraction at the output end drives the paper-pressing swing belt assembly 33 to swing up and down around the hinge point via a transmission structure. By precisely controlling the stroke and speed of the swing cylinder 83, the swing angle and frequency of the paper-pressing swing belt assembly 33 can be accurately adjusted, ensuring it matches the conveying rhythm and stacking requirements of the cardboard, thus achieving reliable temporary storage and release of the cardboard.

[0037] In order to place the palletizing mechanism 3 and the differential conveying mechanism 2 at the same height, in this embodiment, as follows: Figure 10 , 11As shown, a gantry frame 5 is provided on the outside of the palletizing structure. Inside the gantry frame 5 is a lifting drive mechanism 6 for driving the palletizing mechanism 3 to move up and down. The lifting drive mechanism 6 includes a hydraulic cylinder 61, a lifting rack 62, and a synchronous shaft transmission assembly 63. The hydraulic cylinder 61 is installed inside the gantry frame 5, and the output end of the hydraulic cylinder 61 is connected to the palletizing mechanism 3 through a sprocket assembly. The lifting rack 62 is symmetrically distributed on both sides of the gantry frame 5 and extends axially along the height direction of the gantry frame 5. The synchronous shaft transmission assembly 63 consists of a synchronous rotating shaft 631 and a transmission gear 632. The synchronous rotating shaft 631 is laterally rotatably connected to the palletizing frame 31 and is located above the paper pressing swing belt assembly 33. The transmission gear 632 is rotatably installed at both ends of the synchronous rotating shaft 631 and meshes with the lifting rack 62.

[0038] Specifically, the output end of the hydraulic cylinder 61 drives the palletizing frame 31 to rise or fall smoothly along the lifting rack 62 of the gantry frame 5 via a sprocket assembly. To ensure the synchronization and stability of the lifting process, the lifting rack 62 is symmetrically distributed on both sides of the gantry frame 5. The synchronous shaft 631 of the synchronous shaft transmission assembly 63 is laterally rotatably connected to the palletizing frame 31, and the transmission gears 632 at both ends of the shaft mesh with the lifting rack 62. When the hydraulic cylinder 61 is activated, the transmission gears 632 at both ends of the synchronous shaft 631 roll along the lifting rack 62, ensuring that the lifting speed on both sides of the palletizing frame 31 is consistent and avoiding tilting or jamming. The synchronous shaft 631 ensures that the rotational speed of the transmission gears 632 at both ends is consistent, further improving the smoothness and synchronization accuracy of the lifting motion. This drive method can provide a large load capacity to meet the needs of palletizing at different heights, and it is stable and reliable in operation with low maintenance costs.

[0039] In this embodiment, as Figure 12 As shown, multiple sets of lateral limiting components 34 are also provided between the outer wall of the palletizing frame 31 and the gantry 5. The lateral limiting components 34 include limiting seats 341 and limiting wheels 342. The limiting seats 341 are fixedly connected to the outer side of the palletizing frame 31 by bolts. At least two limiting wheels 342 are provided. The two limiting wheels 342 are threadedly connected to the limiting seats 341, and the outer side of the limiting wheels 342 abuts against the side wall of the gantry 5.

[0040] Specifically, the limit seat 341 is firmly fixed to the palletizing frame 31 with bolts, providing a mounting base for the limit wheels 342. The two limit wheels 342 abut against the side wall of the gantry 5 from different angles, forming a lateral constraint on the lifting and lowering movement of the palletizing frame 31. During the lifting and lowering process of the palletizing mechanism 3, the limit wheels 342 roll along the side wall of the gantry 5, serving both a guiding function to ensure that the palletizing frame 31 moves along a set trajectory and effectively limiting the horizontal sway of the palletizing frame 31, thus improving the stability and operational accuracy of the entire mechanism. The position of the limit wheels 342 can be adjusted via a threaded connection to accommodate different clearance requirements and compensation after wear.

[0041] In this embodiment, as Figure 10-12 As shown, the paper output end of the palletizing mechanism 3 is provided with a lateral alignment mechanism 9, which is used to align and arrange the two sides of the palletized cardboard. The lateral alignment mechanism 9 includes a transverse moving frame 91 arranged parallel to the cardboard conveying direction, a three-axis moving assembly 92 connected to the transverse moving frame 91 and moving in the X / Y / Z directions, and a lateral baffle 93 fixedly connected to the three-axis moving assembly 92. The transverse moving frame 91 is slidably connected to the palletizing frame 31, and a rear baffle 94 is provided at the end of the transverse moving frame 91 away from the palletizing mechanism 3. The three-axis moving assembly 92 is slidably connected to the transverse moving frame 91, and the three-axis moving assembly 92 is fixedly connected to the lateral baffle 93.

[0042] Specifically, when the lateral alignment mechanism 9 is working, the transverse moving frame 91 can slide along the length of the palletizer frame 31 to accommodate cardboard of different lengths. The three-axis moving assembly 92 can drive the lateral baffle 93 to move flexibly in the X-axis (cardboard width direction), Y-axis (cardboard conveying direction), and Z-axis (vertical direction). When the cardboard begins to stack, the three-axis moving assembly 92 drives the lateral baffle 93 to move to the set position, while the rear baffle 94 limits the rear end of the cardboard. As the cardboard continues to stack, the lateral baffle 93 gradually pushes and aligns the two sides of the cardboard in the X-direction to ensure that the sides of the stack are neat; the fine adjustment in the Y-direction ensures the precise alignment of the baffle with the edge of the cardboard; the movement in the Z-axis direction can adjust the working position of the lateral baffle 93 according to the stacking height of the cardboard to avoid interference with the stacked cardboard, achieving precise alignment of cardboard at different stacking heights and effectively ensuring the neatness of the cardboard after stacking.

[0043] Once a stack of cardboard is stacked and aligned, the paper-pressing swing belt assembly 33 resets under the action of the swing drive mechanism 8, and its inclined end re-contacts the palletizing conveyor platform 32, releasing the next set of cardboard temporarily stored. At the same time, the double-layer temporary storage insert rod frame 72 of the double insert rod buffer assembly 7 slides along the slide rail to the outside of the palletizing frame 31 under the drive of the insert rod sliding seat 73, transferring the stacked cardboard stack to the unloading area or the conveyor line of the next process.

[0044] It should be noted that the three-axis moving component 92 in this embodiment adopts a common screw and slide rail transmission method in the prior art. For example, a servo motor drives a ball screw to rotate, causing the slider to move along the slide rail in the X / Y / Z axis directions. Its specific structure will not be described in detail here. A flexible buffer pad is attached to the inner surface of the side baffle 93, which can ensure the alignment force during the alignment process while avoiding indentation or damage to the edge of the cardboard.

[0045] The workflow of the dot-matrix stacking method of the present invention is as follows: Taking a single stack of 20 cardboard sheets as an example, firstly, during stacking, the vacuum conveying platform 12 of the upper suction counting mechanism 1 rotates clockwise at a speed of 0.8 m / s, and the power of the suction fan 131 is adjusted to 3.5 kW, generating a negative pressure of -450 Pa at the end of the suction pipe 133. When the first cardboard sheet is guided to the inclined section of the vacuum conveying platform 12 by multiple sets of paper pressing springs 102 of the paper feed spring assembly 10, the paper pressing springs press down slightly under the weight of the cardboard to ensure that the cardboard is flat and adheres to the conveying surface. At this time, the photoelectric sensor installed above the vacuum conveying platform 12 triggers a counting signal, and the system count is 1. As the cardboard moves with the vacuum conveying platform 12, the upper suction assembly 13 continuously provides suction force, and the distance between two adjacent cardboard sheets is maintained within the range of 150 mm ± 20 mm.

[0046] Next, when the count reaches 20, the system sends a signal to the differential conveyor 2, and the conveying speed of the transition conveyor platform 21 is reduced from the original 1.0m / s to 0.6m / s, while the ramp conveyor platform 22 maintains a speed of 1.2m / s, so that this group of 20 cardboard sheets forms an interval of about 800mm with the subsequent cardboard sheets.

[0047] Then, after receiving the signal for 20 sheets of cardboard, the palletizing mechanism 3 starts the paper-pressing drive motor 335 of the paper-pressing swing belt assembly 33 at a speed of 1500 r / min, and the linear speed of the paper-pressing conveyor belt 334 is consistent with that of the palletizing conveyor platform 32. When the last sheet of cardboard enters the palletizing conveyor platform 32, the swing cylinder 83 is vented, the piston rod extends and drives the paper-pressing swing belt assembly 33 to swing upward 15° around the hinge axis through the hook plate 82, so that the paper-pressing conveyor belt 334 forms a temporary storage space with the surface of the palletizing conveyor platform 32.

[0048] Subsequently, the sliding seat 73 of the double-insertion rod buffer assembly 7 drives the double-layer temporary insertion rod frame 72 to move out to the outside of the palletizer frame 31 at a speed of 300mm / s. With the conveying action of the palletizing conveyor platform 32, the cardboard first falls to the temporary insertion rod frame located on the upper layer and is stacked. At this time, the three-axis moving assembly 92 of the lateral alignment mechanism 9 drives the lateral baffle 93 to move towards the side edge of the cardboard at a speed of 100mm / s through the X-axis servo motor, applying a 50N alignment force. The single alignment stroke is 20mm, and it is repeated 3 times to ensure that the side deviation of the cardboard stack is ≤1mm. The Y-axis cylinder drives the rear baffle 94 to move forward to 5mm away from the rear end of the cardboard to limit the rear side of the cardboard. The Z-axis electric push rod raises the lateral baffle 93 to the corresponding height according to the stacking height, thereby realizing the alignment of the cardboard and avoiding the problem of uneven sides of the stacked cardboard.

[0049] Finally, after the stacking is completed, the upper temporary storage rack begins to retract, and the paper stack falls back onto the lower temporary storage rack. When the lower temporary storage rack retracts, the upper temporary storage rack extends again, allowing the previous stack of paper to be transferred to the collection plate or conveyor belt below, simultaneously receiving the next stack of cardboard and stacking it, completing one stacking and unloading process. The double-layer temporary storage rack 72 operates alternately, continuously transferring and unloading the stacked cardboard, thus creating a cycle.

[0050] In summary, this invention achieves accurate counting of cardboard using the upper suction counting mechanism 1 and ensures stable cardboard transport using vacuum adsorption conveying. The differential conveying mechanism 2 can pull apart a preset number of cardboards at a set speed, facilitating subsequent palletizing operations. The palletizing mechanism 3, through the coordinated operation of the paper-pressing swing belt assembly 33, the double-insertion rod buffer assembly 7, and the lateral alignment mechanism 9, achieves neat stacking and efficient unloading of cardboard. Each component is rationally designed, with smooth transmission and reliable operation, significantly improving the automation level and efficiency of cardboard receiving and palletizing, reducing manual labor intensity, and meeting the processing needs of cardboard of different specifications. It has high practical value and promising prospects for widespread application.

[0051] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be included within the scope of protection of this application.

Claims

1. A dual-purpose cardboard collecting and counting device, characterized in that, It includes an upper suction counting mechanism, a differential speed conveying mechanism, and a palletizing mechanism arranged sequentially along the paperboard conveying direction; The upper suction counting mechanism is used to count the cardboard, and includes a platform wall, a vacuum conveying platform and an upper suction assembly. The two ends of the vacuum conveying platform are rotatably connected to the platform wall through bearing seats, and one end of the vacuum conveying platform is inclined upward along the cardboard conveying direction. The upper suction assembly is connected between the platform wall and the vacuum conveying platform and is in communication with the vacuum conveying platform. The differential conveying mechanism is used to pull the paperboard at a preset speed. It includes a transition conveying platform and an inclined conveying platform. The transition conveying platform is equipped with multiple sets of paper pressing roller assemblies. The two ends of the multiple sets of paper pressing roller assemblies are connected to the transition conveying platform. The inclined conveying platform is connected between the transition conveying platform and the palletizing mechanism. Both the inclined conveying platform and the vacuum conveying platform adopt the vacuum adsorption conveying method. The palletizing mechanism is used to stack and unload a preset number of cardboard pieces. It includes a palletizing frame, a palletizing conveyor platform mounted on the palletizing frame, and a paper-pressing swing belt assembly mounted on the palletizing conveyor platform. A gantry frame is provided on the outside of the palletizing frame, and a lifting drive mechanism is connected between the gantry frame and the palletizing mechanism to drive the palletizing mechanism to move up and down. A double-pole buffer assembly is provided below the palletizing conveyor platform to receive the cardboard and transfer it for unloading. One end of the paper-pressing swing belt assembly is inclined downward along the cardboard conveying direction and contacts the palletizing conveyor platform. A swing drive mechanism is connected between the paper-pressing swing belt assembly and the palletizing frame to drive the inclined end of the paper-pressing swing belt assembly to swing up and down to temporarily store or release the cardboard.

2. The dual-purpose cardboard receiving and counting device according to claim 1, characterized in that, The paper output end of the palletizing mechanism is equipped with a lateral alignment mechanism for aligning and straightening the two sides of the palletized cardboard. The lateral alignment mechanism includes a transverse moving frame arranged parallel to the cardboard conveying direction, a three-axis moving assembly connected to the transverse moving frame and moving in the X / Y / Z directions, and a lateral baffle fixedly connected to the three-axis moving assembly. The transverse moving frame is slidably connected to the palletizing machine frame, and a rear baffle is provided at the end of the transverse moving frame away from the palletizing mechanism. The three-axis moving assembly is slidably connected to the transverse moving frame, and the three-axis moving assembly is fixedly connected to the lateral baffle.

3. The dual-purpose cardboard receiving and counting device according to claim 1, characterized in that, The upper suction assembly includes a suction fan, an air duct, and a suction pipe. The suction fan is fixedly connected to the top of the platform vehicle wall and is connected to the air duct. The air duct is horizontally fixed to the platform vehicle wall. The suction pipes are equidistantly arranged on the air duct, with one end connected to the air duct and the other end connected to the vacuum conveying platform.

4. The dual-purpose cardboard receiving and counting device according to claim 1, characterized in that, The paper pressing roller assembly includes a sliding frame and multiple sets of paper pressing rollers evenly arranged on the sliding frame. The sliding frame is driven by gears and racks meshing with the top two sides of the transition conveying platform. A blower pipe is provided on the sliding frame and is placed horizontally above the transition conveying platform. The blower nozzle of the blower pipe faces one side of the transition conveying platform. The multiple sets of paper pressing rollers are fixed on the sliding frame along the paperboard conveying direction. The outer surface of each set of paper pressing rollers is in contact with the surface of the transition conveying platform.

5. The dual-purpose cardboard receiving and counting device according to claim 1, characterized in that, The vacuum conveying platform, transition conveying platform, and inclined conveying platform are all equipped with paper feed spring assemblies at their paper feed ends. Each paper feed spring assembly includes a mounting frame, multiple sets of paper pressing springs, and a locking handle. The mounting frame is horizontally positioned above the cardboard. One end of each set of paper pressing springs is inclined upward to form a cardboard inlet and is fixed to the mounting frame by the locking handle. The other end abuts against the surface of the vacuum conveying platform, transition conveying platform, and inclined conveying platform.

6. The dual-purpose cardboard receiving and counting device according to claim 1, characterized in that, The paper-pressing swing belt assembly consists of a paper-pressing bracket, a paper-pressing roller shaft, and a paper-pressing driven wheel. The two side bracket plates of the paper-pressing bracket are hinged to the palletizing machine frame. The paper-pressing roller shaft and the paper-pressing driven wheel are located at both ends of the paper-pressing bracket, and a paper-pressing conveyor belt is sleeved between the paper-pressing roller shaft and the paper-pressing driven wheel. One end of the paper-pressing roller shaft is connected to a paper-pressing drive motor through a pulley and a synchronous belt.

7. The dual-purpose cardboard receiving and counting device according to claim 1, characterized in that, The dual-insertion rod buffer assembly includes an auxiliary support frame, a double-layer temporary insertion rod frame, and an insertion rod sliding seat. The auxiliary support frame is fixedly connected to the palletizing machine frame and is correspondingly arranged between the double-layer temporary insertion rod frames. The double-layer temporary insertion rod frame is composed of multiple equally spaced parallel insertion rods, and one end of the double-layer temporary insertion rod frame is slidably connected to the insertion rod sliding seat. The insertion rod sliding seat is fixed to the palletizing machine frame, and a slide rail is provided at the bottom of the insertion rod sliding seat, which extends along the extension direction of the double-layer temporary insertion rod frame.

8. The dual-purpose cardboard receiving and counting device according to claim 1, characterized in that, The swing drive mechanism includes a crossbeam, a hook plate, and a swing cylinder. The crossbeam is horizontally arranged at one inclined end of the paper-pressing swing belt assembly, and both ends of the crossbeam are fixedly connected to the palletizer frame. One end of the hook plate is vertically fixed to the crossbeam, and the other end is fixedly connected to the paper-pressing swing belt assembly. The swing cylinder is fixed to the crossbeam through a hinge seat, and the output end of the swing cylinder is drivenly connected to the paper-pressing swing belt assembly.

9. The dual-purpose cardboard receiving and counting device according to claim 1, characterized in that, The lifting drive mechanism includes a hydraulic cylinder, a lifting rack, and a synchronous shaft transmission assembly. The hydraulic cylinder is installed inside the gantry frame, and its output end is connected to the palletizing mechanism via a sprocket assembly. The lifting rack is symmetrically distributed on both sides of the gantry frame and extends axially along the height direction of the gantry frame. The synchronous shaft transmission assembly consists of a synchronous rotating shaft and a transmission gear. The synchronous rotating shaft is laterally rotatably connected to the palletizing frame and is located above the paper-pressing swing belt assembly. The transmission gear is rotatably installed at both ends of the synchronous rotating shaft and meshes with the lifting rack.

10. The dual-purpose cardboard receiving and counting device according to claim 1, characterized in that, Multiple sets of lateral limiting components are also provided between the outer wall of the palletizing machine frame and the gantry frame. The lateral limiting components include limiting seats and limiting wheels. The limiting seats are fixedly connected to the outer side of the palletizing machine frame by bolts. At least two limiting wheels are provided. The two limiting wheels are threadedly connected to the limiting seats, and the outer side of the limiting wheels abuts against the side wall of the gantry frame.

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