A multi-layer stacking and in-boxing mechanism for a packaging line

Abstract

This invention relates to the field of automated packaging equipment, and provides a multi-layer stacking and box-loading mechanism for packaging lines. The mechanism includes a support platform, on which a conveying mechanism, a stacking mechanism, and a pushing mechanism are mounted. The conveying mechanism is used to quantitatively convey products to be stacked. The stacking mechanism is located on one side of the conveying mechanism. The pushing mechanism is located on the other side of the stacking mechanism, with its output end opposite to the stacking mechanism, and is used to transfer products to be stacked from the conveying mechanism to the stacking mechanism. The stacking mechanism, in conjunction with the pushing mechanism, stacks the transferred products layer by layer. This invention achieves coordinated operation of quantitative and orderly product conveying and automatic layered stacking, improving stacking accuracy, production efficiency, and equipment versatility.

Description

Technical Field

[0001] This invention relates to the field of automated packaging equipment, and more specifically to a multi-layer stacking box-in mechanism for packaging lines. Background Technology

[0002] In automated packaging production lines, product stacking into boxes is one of the core processes in finished product packaging, widely used in the packaging of various products such as food, daily chemicals, hardware, and electronic components. The efficiency, regularity, and automation precision of stacking into boxes directly affect the production cycle time and product packaging quality of the entire packaging line.

[0003] Currently, existing packaging stacking and boxing equipment has many shortcomings in practical applications. In the conveying stage, the conveying mechanism of most traditional stacking equipment lacks quantitative separation and real-time detection capabilities. Products enter the stacking station in a disordered state, which easily leads to problems such as excess material, insufficient material, and misalignment. This results in uneven stacking layers, product misalignment, and difficulty in guaranteeing stacking accuracy and packaging qualification rate.

[0004] In the stacking process, conventional stacking structures mostly adopt a fixed single-layer stacking mode, which can only complete the simple single-layer product pushing into the box and cannot achieve multi-layer orderly stacking. For products that require multi-layer orderly stacking, manual assistance in layer placement or repeated stacking operations are often required, resulting in low automation. This not only increases labor costs but also restricts the overall processing efficiency of the production line.

[0005] In the feeding stage, the existing equipment's feeding structure lacks operational stability, and the feeding trajectory lacks effective constraints, making the product prone to displacement or crushing damage during feeding. At the same time, most equipment does not have automatic partition feeding and adaptation functions. For products that require layered isolation and protection, partitions still need to be placed manually in advance, which is a cumbersome process and is prone to problems such as partition displacement, omission, and misplacement, affecting the neatness of the product packaging and the protective effect.

[0006] In addition, traditional stacking equipment has a fixed stacking spacing and placement space, which cannot be flexibly adjusted according to the size and number of stacking layers of different products. The equipment has poor versatility and is difficult to adapt to the flexible packaging production needs of multiple categories and specifications of products. Summary of the Invention

[0007] To address the problems of low automation, poor multi-layer stacking accuracy, and weak versatility in existing stacking and boxing mechanisms, this invention provides a multi-layer stacking and boxing mechanism for packaging lines, which enables coordinated operation of quantitative product delivery, automatic layer stacking, and precise material pushing.

[0008] To achieve the above objectives, the present invention adopts the following technical solution:

[0009] A multi-layer stacking box-in mechanism for a packaging line includes a support platform. The support platform is provided with a conveying mechanism, a stacking mechanism, and a pushing mechanism. The conveying mechanism is used to quantitatively convey products to be stacked. The stacking mechanism is located on one side of the conveying mechanism, and the pushing mechanism is located on the other side of the stacking mechanism, with its output end opposite to the stacking mechanism. When the pushing mechanism outputs, it transfers the products to be stacked on the conveying mechanism to the stacking mechanism. The stacking mechanism is used to cooperate with the pushing mechanism to stack the products to be stacked layer by layer from the conveying mechanism to the stacking mechanism.

[0010] The above solution constructs an automated stacking process of "quantitative supply - precise transfer - layer-by-layer accumulation" by spatially arranging and functionally linking the conveying mechanism, stacking mechanism and pushing mechanism on the carrier platform, providing basic structural support for multi-layer orderly stacking.

[0011] In one embodiment, the conveying mechanism includes several support rods fixed on the support platform, two parallel side plates fixedly mounted on the support rods, a drive roller and a driven roller rotatably mounted between the two side plates, the drive roller and the driven roller being connected by a conveyor belt, a conveyor motor fixedly mounted on one of the side plates, the output end of the conveyor motor being connected to the drive roller, and several push blocks fixedly mounted on the conveyor belt, the products to be stacked being located between two adjacent push blocks and moving with the conveyor belt.

[0012] This implementation method uses push blocks that are equidistantly arranged on the conveyor belt to physically separate the products. Combined with a motor-driven roller transmission system, it realizes the quantitative conveying of products at a fixed pitch, avoiding the problems of accumulation or disordered spacing caused by uneven friction in traditional belt conveying, and providing a material base with consistent position and quantity for subsequent stacking.

[0013] In one embodiment, the stacking mechanism includes a mounting frame disposed on the support platform. The mounting frame has a "door" shaped structure, and two support plates are fixedly connected to the support platform. A fixed support is disposed on the support platform inside the mounting frame. A lifting driver is fixedly disposed on the fixed support. A lifting pallet is disposed at the output end of the lifting driver. The lifting pallet is located above the fixed support. A plurality of stacking uprights are disposed on the lifting pallet. The stacking uprights are parallel to each other and perpendicular to the conveying direction of the conveying mechanism. A plurality of pushing grooves are respectively opened on the opposite sidewalls of adjacent stacking uprights. The pushing grooves extend in a direction perpendicular to the conveying direction of the conveying mechanism and parallel to the lifting pallet. The spacing between the plurality of pushing grooves on the same stacking upright is the same.

[0014] This implementation uses a lifting drive to lift the lifting tray and stacking uprights as a whole, and with the directional guidance of the pushing chute, each layer of products is accurately accumulated in the vertical direction according to the preset layer height. The parallel arrangement of the stacking uprights and the equidistant design of the chute ensure the alignment between layers, avoid misalignment or tilting during the stacking process, and provide a stable guide reference for the pushing mechanism.

[0015] In one embodiment, the pushing mechanism includes a mounting frame fixed on the support platform. The mounting frame is inverted "L" shape, with its top crossbeam located above the conveying mechanism and its free end facing the stacking mechanism. A pushing drive wheel and a pushing driven wheel are provided on the crossbeam of the mounting frame. The pushing drive wheel and the pushing driven wheel are connected by a pushing drive belt. A pushing motor and a pushing slide are also provided on the crossbeam of the mounting frame. The pushing motor is fixedly connected to the mounting frame, and its output end is fixedly connected to the pushing drive wheel. The pushing slide is slidably connected to the crossbeam of the mounting frame and fixedly connected to the pushing drive belt. When the pushing motor outputs, the pushing slide will reciprocate along the crossbeam of the mounting frame under the drive of the pushing drive belt.

[0016] This implementation adopts a linear drive structure of motor-synchronous belt-slide carriage, which enables the pushing action to have high repeatability and stability. The inverted "L" shaped mounting bracket spans above the conveying mechanism, which saves lateral space and ensures that the pushing path is orthogonal to the conveying direction, realizing interference-free transfer of products from the conveyor line to the stacking area.

[0017] In one embodiment, a combing frame is fixedly installed on the side plate at the input end of the conveying mechanism. The combing frame is located above the conveyor belt. A detection sensor is fixedly installed on the side plate on one side of the combing frame, with the detection end of the detection sensor facing the conveyor belt. A blocking cover is fixedly installed on the side plate at the extreme end of the output direction of the conveying mechanism. A discharge chute is fixedly installed at the bottom of the blocking cover.

[0018] This implementation uses a combing frame to correct the posture of products entering the conveyor belt, preventing skewing or stacking; detection sensors provide real-time feedback on the material status, triggering shutdown or alarm in case of abnormalities; the blocking cover and discharge chute form a terminal limiting and guiding structure, ensuring that the product is in a unique and definite push position before being pushed, improving the fault tolerance and cycle stability of the entire line.

[0019] In one embodiment, a discharge bracket is also fixedly installed on the mounting frame, and the lifting plate is located between the discharge bracket and the conveying mechanism. A blocking driver is also installed on the fixed support below the discharge bracket, and a lifting baffle is fixedly installed at the output end of the blocking driver. The lifting baffle is located between the lifting plate and the discharge bracket. Two support tubes are also fixedly installed on the fixed support. The two support tubes are symmetrically distributed along the lifting driver. A lifting guide rod is slidably installed in each support tube. The top end of the lifting guide rod extends from the top of the support tube and is fixedly connected to the bottom surface of the lifting plate.

[0020] This implementation uses symmetrically arranged support tubes and lifting guide rods to form a double guiding constraint, which effectively suppresses the shaking or deflection of the lifting pallet when the load changes; the lifting baffle rises after stacking to prevent the product from accidentally slipping during the unloading process; the unloading bracket provides temporary support for the finished product stack, which is convenient for subsequent grabbing or pushing into the box, thus enhancing the dynamic stability and unloading reliability of the stacking process.

[0021] In one embodiment, two parallel adjusting slide rods are fixedly installed on the crossbeam at the top of the mounting frame. Two first adjusting frames are slidably installed on the adjusting slide rods. Each first adjusting frame is provided with a fixed frame and a second adjusting frame. The fixed frame is fixedly connected to the first adjusting frame, and the fixed frames on the two first adjusting frames are positioned opposite each other. The second adjusting frame is slidably connected to the first adjusting frame. The two fixed frames on the two first adjusting frames and the second adjusting frame together form an adjustable partition temporary storage frame.

[0022] This implementation uses a combination structure of slide bar, adjustment frame, and sliding pair to allow the width and depth of the partition storage frame to be manually or automatically adjusted according to the partition size. It can adapt to various partition sizes without replacing parts, significantly improving the equipment's response speed and compatibility to differentiated packaging needs.

[0023] In one embodiment, slide rails are fixedly installed on a set of opposite inner walls of the mounting frame, with the two slide rails being parallel to each other. A guide groove is also provided on the inner wall of the mounting frame on one side of the slide rail. A pallet slide is also provided between the two slide rails. The pallet slide is provided with a slider and a mounting rod. The slider is slidably connected to the slide rail. A reversing arm and several suction cups are fixedly installed on the mounting rod. The free end of the reversing arm is slidably engaged with the guide groove. When the pallet slide reciprocates along the slide rail, the suction cups will flip under the cooperation of the reversing arm and the guide groove, which is used to move the partition in the partition temporary storage frame between the two stacked uprights.

[0024] This implementation utilizes the guide groove to constrain the trajectory of the reversing arm, transforming the linear motion of the carriage into the flipping action of the suction cup, thereby achieving automatic switching between the plate picking and placing postures. The negative pressure adsorption of the suction cup ensures reliable plate gripping, and the guide rail ensures accurate transport path, thus completing the directional placement of the plate without an additional rotation drive source, simplifying the structure and improving the consistency of plate placement.

[0025] In one embodiment, a pallet-moving motor is fixedly installed on the outer wall of one of the side plates of the mounting frame. A protective cover is also installed on the mounting frame on one side of the pallet-moving motor. A pallet-moving drive wheel and a pallet-moving driven wheel are rotatably installed on the side plate of the mounting frame inside the protective cover. The pallet-moving drive wheel and the pallet-moving driven wheel are driven by a pallet-moving drive belt. The output end of the pallet-moving motor is connected to the pallet-moving drive wheel. The pallet-moving slide is connected to the pallet-moving drive belt.

[0026] This implementation integrates the pallet drive system on the outside of the mounting frame sidewall and isolates dust and foreign objects with a protective cover to ensure long-term stable operation of the transmission components; the synchronous belt drive has low noise and lubrication-free characteristics, making it suitable for clean packaging environments; the external motor facilitates maintenance and avoids interference with the stacking area, optimizing the overall layout and maintenance convenience.

[0027] In one embodiment, a push rod is fixedly installed on the pusher slide. When the pusher slide approaches the stacking mechanism, the push rod will be inserted between the two stacking uprights, and the two ends of the push rod will slide along the pusher grooves on the two stacking uprights respectively.

[0028] This implementation method uses push rods embedded in push grooves at both ends to form double-sided guiding constraints, so that the pushing force is evenly applied to both sides of the product, avoiding rotation or extrusion deformation caused by unilateral force; the fit clearance between the groove and the push rod is controllable, which not only ensures smooth movement but also restricts lateral freedom, fundamentally eliminating the risk of product deviation and damage during the pushing process.

[0029] Beneficial effects:

[0030] This invention integrates a conveying mechanism, a stacking mechanism, and a pushing mechanism on a support platform, and assigns specific structural relationships and motion coordination to each mechanism, thus constructing a complete automated multi-layer stacking operation chain. The conveying mechanism uses push blocks to achieve equidistant quantitative product supply, solving the problem of inaccurate stacking base caused by disordered materials. The stacking mechanism, through the coordinated lifting of the lifting pallet and stacking uprights, combined with the directional guidance of the pushing chute, achieves precise control of layer height and layer alignment, replacing manual layering operations. The pushing mechanism adopts a synchronous belt-driven carriage structure, combined with the double-sided limiting of the push rod and chute, ensuring the rigidity and stability of the pushing trajectory and eliminating the risk of product breakage. Furthermore, the combination of the combing frame, detection sensors, and blocking covers enhances the material control capabilities at the conveying end; symmetrical lifting guide rods and lifting baffles improve the dynamic stability of the stacking process; the adjustable partition temporary storage frame and the flip-and-transfer mechanism based on the guide groove enable the partition feeding to have size self-adaptation and posture self-switching capabilities, completing layer isolation without manual intervention; the external transfer drive and protective design balance maintenance convenience and operational reliability. The aforementioned structural features, through the principles of mechanical linkage and spatial constraints, systematically solve the shortcomings of existing equipment in terms of quantitative accuracy, multi-layer stacking, partition adaptation, and versatility, significantly improving the automation level, product qualification rate, and flexible production capacity of the packaging line. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the input end structure of the conveying mechanism of the present invention;

[0034] Figure 3 This is a schematic diagram of the cooperative structure of the conveying mechanism output end and the stacking mechanism with the pushing mechanism of the present invention;

[0035] Figure 4 This is a schematic diagram of the connection structure between the discharge chute and the baffle cover of the present invention;

[0036] Figure 5 This is a front view of the stacking mechanism of the present invention;

[0037] Figure 6 This is a schematic diagram of the installation and connection between the pallet motor and the pallet drive wheel of the present invention;

[0038] Figure 7 yes Figure 4 Enlarged view of the structure at point A in the image;

[0039] Figure 8 yes Figure 5 Enlarged view of the structure at point B in the image.

[0040] The annotations in the attached figures are explained as follows:

[0041] 1. Support platform; 2. Conveying mechanism; 201. Support rod; 202. Side plate; 203. Combing frame; 204. Detection sensor; 205. Conveyor belt; 206. Push block; 207. Driven roller; 208. Conveyor motor; 209. Drive roller; 210. Block cover; 211. Discharge chute; 3. Stacking mechanism; 301. Mounting frame; 302. Fixing frame; 303. Transfer motor; 304. First adjusting frame; 305. Slide rail; 306. Guide groove; 307. Slider; 308. Reversing arm; 309. Transfer carriage; 310. Mounting rod; 311. Transfer drive belt; 312. Transfer carriage... 313. Moving wheel; 314. Second adjusting frame; 315. Lifting driver; 316. Blocking driver; 317. Fixed support; 318. Lifting pallet; 319. Stacking upright; 320. Protective cover; 321. Pushing chute; 322. Suction cup; 323. Lifting baffle; 324. Adjusting slide bar; 325. Lifting guide rod; 326. Support tube; 327. Discharge bracket; 4. Pushing mechanism; 401. Mounting frame; 402. Pushing motor; 403. Pushing slide; 404. Pushing drive wheel; 405. Pushing driven wheel; 406. Pushing drive belt; 407. Push rod. Detailed Implementation

[0042] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the 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, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0043] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0044] The present invention will be further described below with reference to the accompanying drawings:

[0045] Example 1: As Figures 1-8 As shown, this embodiment provides a multi-layer stacking and boxing mechanism for a packaging line, which forms the basic hardware architecture for the continuous conveying and layered stacking of products. The invention includes a support platform 1, on which a conveying mechanism 2, a stacking mechanism 3, and a pushing mechanism 4 are mounted. The support platform 1 serves as the installation reference platform for the entire machine, providing a unified horizontal support surface and positional reference system for each functional module, ensuring the long-term stability of the relative positions between the mechanisms. In specific implementations, the support platform 1 can adopt a welded steel frame or aluminum profile frame structure, and its bottom can be equipped with adjustable feet to adapt to the flatness of different workshop floors.

[0046] The conveying mechanism 2 is used for quantitatively conveying products to be stacked. Specifically, the conveying mechanism 2 includes several support rods 201 fixed on the support platform 1. Two parallel side plates 202 are fixedly mounted on the support rods 201. A drive roller 209 and a driven roller 207 are rotatably mounted between the two side plates 202. The drive roller 209 and the driven roller 207 are connected by a conveyor belt 205. A conveyor motor 208 is fixedly mounted on one of the side plates 202, and the output end of the conveyor motor 208 is connected to the drive roller 209. This dual-roller tensioning and direct-drive motor structure ensures constant tension and controllable speed of the conveyor belt 205. More importantly, several push blocks 206 are fixedly mounted on the conveyor belt 205. The products to be stacked are located between two adjacent push blocks 206 and move with the conveyor belt 205. The push blocks 206 are the core physical structure for achieving "quantitative conveying". Unlike traditional conveying methods that rely on belt friction, pushers 206 are evenly spaced arrayed on the conveyor belt 205, forming independent physical containment chambers. When products enter the conveyor line, they are forcibly confined within the area formed by adjacent pushers 206. Regardless of whether the conveyor belt 205 starts, stops, accelerates, or decelerates, the center distance between products always equals the preset spacing of the pushers 206. This rigid separation mechanism fundamentally eliminates the problems of material slippage, accumulation, or random spacing fluctuations, providing a precise and positional material flow for subsequent stacking processes, serving as the first line of defense to ensure the stability of the entire machine's cycle time. It should be understood that the shape of the pushers 206 can be designed to fit the product's shape, such as L-shaped, U-shaped, or flat, as long as it serves the function of longitudinal limiting and separation.

[0047] The pushing mechanism 4 is located on the other side of the stacking mechanism 3, and its output end is opposite to the stacking mechanism 3. When the pushing mechanism 4 outputs, it transfers the products to be stacked on the conveying mechanism 2 to the stacking mechanism 3. In this embodiment, the pushing mechanism 4 includes a mounting frame 401 fixed on the support platform 1. The mounting frame 401 is inverted L-shaped, with its top crossbeam located above the conveying mechanism 2 and its free end facing the stacking mechanism 3. This inverted L-shaped spanning design has significant space advantages: on the one hand, it utilizes the idle space above the conveyor line, avoiding additional lateral layout dimensions on the side of the conveyor line, making the overall structure more compact; on the other hand, the crossbeam spans the conveyor line, allowing the starting point of the pushing action to be precisely aligned with the push station on the conveyor line, and the endpoint to reach the stacking area, forming a straight transfer path that is strictly orthogonal to the conveying direction. A pusher drive wheel 404 and a pusher driven wheel 405 are mounted on the crossbeam of the mounting frame 401. The pusher drive wheel 404 and the pusher driven wheel 405 are connected by a pusher drive belt 406. A pusher motor 402 and a pusher slide 403 are also mounted on the crossbeam of the mounting frame 401. The pusher motor 402 is fixedly connected to the mounting frame 401, and its output end is fixedly connected to the pusher drive wheel 404. The pusher slide 403 is slidably connected to the crossbeam of the mounting frame 401 and fixedly connected to the pusher drive belt 406. When the pusher motor 402 outputs power, the pusher slide 403 reciprocates along the crossbeam of the mounting frame 401 under the drive of the pusher drive belt 406. The drive method, using synchronous belt transmission and linear guide rails, offers higher repeatability and speed controllability compared to cylinder pushing. The pusher motor 402 controls the stroke and frequency of the slide by forward and reverse rotation, allowing for flexible matching with different production cycles. Meanwhile, synchronous belt drives operate smoothly and with low noise, effectively reducing the impact and vibration generated by high-speed reciprocating motion, and preventing products from shifting or tipping over due to inertia during transfer.

[0048] The stacking mechanism 3 is located on one side of the conveying mechanism 2 and is used to cooperate with the pushing mechanism 4 to stack the products to be stacked layer by layer from the conveying mechanism 2 to the stacking mechanism 3. In the basic architecture of this embodiment, the stacking mechanism 3 is arranged to the side of the conveying mechanism 2, directly opposite the output end of the pushing mechanism 4. The three together form a "T"-shaped or cross-shaped work topology. The conveying mechanism 2 is responsible for the material supply in the X-axis direction, the pushing mechanism 4 is responsible for the lateral transfer in the Y-axis direction, and the stacking mechanism 3 receives and accumulates materials in the Z-axis direction. This orthogonal layout is not only logically clear, but also ensures that each motion axis is independent, which facilitates subsequent modular maintenance and debugging. It should be noted that although this embodiment shows the above-mentioned specific spatial arrangement, in other embodiments, as long as the functional connection and material flow logic of the conveying, pushing, and stacking are satisfied, the relative angles or height differences of each mechanism can also be adaptively adjusted according to the actual production line space.

[0049] Example 2

[0050] In this embodiment, the precision lifting structure and guiding feeding mechanism of the stacking mechanism 3 have been further refined to solve the problems of dynamic stability and alignment accuracy during multi-layer stacking. Specifically, the stacking mechanism 3 includes a mounting frame 301 mounted on the support platform 1. The mounting frame 301 has a gate-shaped structure, and two support plates are fixedly connected to the support platform 1. A fixed support 317 is provided on the support platform 1 inside the mounting frame 301. A lifting driver 315 is fixedly mounted on the fixed support 317. A lifting plate 318 is provided at the output end of the lifting driver 315, and the lifting plate 318 is located above the fixed support 317. This gate-shaped frame structure provides a highly rigid external support boundary for the lifting movement, effectively resisting the lateral reaction force generated during the feeding process. Several stacked uprights 319 are provided on the lifting pallet 318. The stacked uprights 319 are parallel to each other and perpendicular to the conveying direction of the conveying mechanism 2. Several pushing grooves 321 are respectively opened on the opposite side walls of adjacent stacked uprights 319. The pushing grooves 321 extend in a direction perpendicular to the conveying direction of the conveying mechanism 2 and parallel to the lifting pallet 318. The spacing between the pushing grooves 321 on the same stacked upright 319 is the same. Here, the pushing grooves 321 are not only the accommodating space for the product, but also the physical definition benchmark of the layer height. By opening the grooves at equal intervals, the abstract "layer height parameter" is transformed into a definite mechanical dimension, ensuring that no matter how many layers are stacked, the vertical position of each layer is determined by the processing accuracy of the groove, rather than relying on the repeatability positioning accuracy of the lifting drive 315, thereby greatly reducing the dependence on the motor control system. It should be understood that the cross-sectional shape of the pushing groove 321 is not limited to rectangle, but can also be U-shaped, V-shaped, or irregularly shaped groove with chamfers, as long as it can form an effective longitudinal limit and lateral guide for the side of the product.

[0051] To further improve the stability of the lifting process, two support pipes 326 are fixedly installed on the fixed support 317. The two support pipes 326 are symmetrically distributed along the lifting drive 315. A lifting guide rod 325 is slidably installed in each support pipe 326. The top end of the lifting guide rod 325 extends from the top of the support pipe 326 and is fixedly connected to the bottom surface of the lifting pallet 318. This symmetrical double guide rod structure constitutes a key anti-deflection constraint mechanism. In actual working conditions, when the product is pushed into one side of the lifting pallet 318, an eccentric load relative to the axis of the lifting drive 315 will be generated. If only a single lead screw or cylinder is used for support, it is very easy for the pallet to tilt or jam. In this embodiment, the symmetrically arranged support pipes 326 and lifting guide rods 325 form a wide-span parallelogram guiding system, which decomposes the eccentric load into radial shear force on the two guide rods, which is evenly borne by the wall of the support pipe 326, thereby completely eliminating the risk of torque deflection during the lifting process. In practical implementation, a linear bearing or a self-lubricating copper sleeve can be embedded inside the support tube 326 to reduce the coefficient of friction and extend its service life. Meanwhile, a discharge bracket 327 is fixedly installed on the mounting frame 301, and a lifting plate 318 is located between the discharge bracket 327 and the conveying mechanism 2. A blocking actuator 316 is also installed on the fixed support 317 below the discharge bracket 327, and a lifting baffle 323 is fixedly installed at the output end of the blocking actuator 316, located between the lifting plate 318 and the discharge bracket 327. The lifting baffle 323 acts as a safety interlock: during the stacking operation, the lifting baffle 323 is in a high position to block and position the products pushed into the lifting tray 318; when the stacking is completed and the product needs to be discharged, the blocking driver 316 first drives the lifting baffle 323 to lower to a position where the top is flush with the plane of the discharge tray 327. Then, the pushing mechanism 4 pushes the stacked product on the lifting tray 318 into the packaging box with the support of the discharge tray 327. Then, the lifting baffle 323 rises again to position and block.

[0052] In terms of the execution of the pushing action, this embodiment adopts a double-sided embedded guide design. A push rod 407 is fixedly installed on the pushing carriage 403. When the pushing carriage 403 approaches the stacking mechanism 3, the push rod 407 will be inserted between the two stacking uprights 319, and the two ends of the push rod 407 will slide along the pushing grooves 321 on the two stacking uprights 319 respectively. This structural feature transfers the precision control of the pushing trajectory from the cantilevered carriage to the rigid stacking uprights 319. In conventional technology, the push head is often only fixed to the front end of the carriage. As the stroke increases, the deflection deformation of the cantilever end will cause the pushing angle to deviate, thereby squeezing the edges and corners of the product. In this embodiment, the two ends of the push rod 407 are simultaneously embedded in the pushing grooves 321 on both sides. The sidewalls of the grooves form a forced linear constraint on the push rod 407, so that the push rod 407 always maintains a strictly perpendicular posture to the conveying direction throughout the entire pushing process. Even with minor assembly errors or wear gaps in the carriage itself, the actual movement trajectory of the push rod 407 is still determined by the high-precision groove, thus ensuring the uniform transmission of the pushing force and effectively preventing the product from rotating, misaligning, or being deformed due to uneven force. Furthermore, a small clearance fit is preferable between the push rod 407 and the pushing groove 321, for example, a single-sided clearance controlled between 0.1mm and 0.5mm. This ensures smooth sliding while limiting the degree of freedom of the push rod 407 within the groove, a necessary condition for achieving high-speed, quiet, and damage-free stacking.

[0053] Example 3

[0054] In this embodiment, the partition temporary storage and automatic handling mechanism is further specifically designed to solve the technical problems of adapting to multiple specifications of partitions and automatically switching their postures. Two parallel adjusting rods 324 are fixedly installed on the crossbeam at the top of the mounting frame 301. Two first adjusting frames 304 are slidably mounted on the adjusting rods 324. Each first adjusting frame 304 is equipped with a fixed frame 302 and a second adjusting frame 314. The fixed frame 302 is fixedly connected to the first adjusting frame 304, and the fixed frames 302 on the two first adjusting frames 304 are positioned opposite each other. The second adjusting frame 314 is slidably connected to the first adjusting frame 304. The two opposing fixed frames 302 and the second adjusting frame 314 on the two first adjusting frames 304 together form an adjustable partition temporary storage frame. Specifically, this sliding nested structure constructs a two-dimensional size adaptive system. The first adjusting frame 304, sliding along the adjusting slide bar 324, defines the width dimension of the temporary storage frame, accommodating partitions of different lengths. The second adjusting frame 314, sliding on the first adjusting frame 304, defines the depth dimension of the temporary storage frame, accommodating partitions of different widths. The fixed frame 302, serving as a reference surface, cooperates with the movable second adjusting frame 314 to form a flexible constraint on the four sides of the partition. In actual operation, when changing product specifications leads to changes in partition dimensions, the operator only needs to loosen the locking mechanism and manually push or pull the adjusting frame to the corresponding scale or limit point to quickly complete the changeover without disassembling or replacing any parts. It should be understood that although this embodiment demonstrates a manual adjustment method, in other embodiments, a lead screw and nut pair or an electric push rod 407 can be integrated into the adjusting slide bar 324 or the first adjusting frame 304 to achieve electrically automated adjustment of the temporary storage frame size, adapting to the needs of more flexible production lines. This purely mechanical, size-compatible design not only reduces equipment costs, but more importantly, avoids downtime caused by frequent tooling changes, significantly improving the equipment's response speed to different packaging specifications.

[0055] To achieve automatic conversion of the partitions from a horizontal temporary storage state to a vertical stacking state, slide rails 305 are fixedly installed on a set of opposite inner walls of the mounting frame 301. The two slide rails 305 are parallel to each other. A guide groove 306 is also provided on the inner wall of the mounting frame 301 on one side of the slide rail 305. A pallet-moving slide 309 is also provided between the two slide rails 305. The pallet-moving slide 309 is equipped with a slider 307 and a mounting rod 310. The slider 307 is slidably connected to the slide rail 305. A reversing arm 308 and several suction cups 322 are fixedly installed on the mounting rod 310. The free end of the reversing arm 308 is slidably engaged with the guide groove 306. When the pallet-moving slide 309 slides back and forth along the slide rail 305, the suction cups 322 will flip under the cooperation of the reversing arm 308 and the guide groove 306, which is used to move the partitions in the partition temporary storage frame between the two stacking uprights 319. This structure is the core mechanism for achieving "passive flipping" in this embodiment. Specifically, the guide groove 306 is not a simple straight groove, but a reversing trajectory segment containing a specific curvature or angle. When the pallet carriage 309 moves horizontally along the slide rail 305 under power drive, the free end of the reversing arm 308 fixed on the mounting rod 310 is forced into the guide groove 306 and slides. When the carriage passes through the reversing trajectory segment, the side wall of the guide groove 306 applies a component force perpendicular to the direction of movement to the free end of the reversing arm 308, forming a torque relative to the axis of the mounting rod 310, thereby driving the mounting rod 310 and the suction cup 322 assembly fixed thereto to rotate at a certain angle. This means that the switching between the pallet picking posture and the pallet placing posture of the suction cup 322 is completely completed automatically by the linear displacement of the carriage through the mechanical cam effect, without the need for an additional rotary motor or cylinder. This mechanical linkage method has extremely high synchronous reliability, completely eliminating the risk of pallet dropping or collision caused by electrical control timing errors, and also greatly simplifies the complexity of the electrical control system and wiring. In addition, the suction cup 322 can be vacuum adsorption or electromagnetic adsorption, preferably vacuum suction cup 322 to avoid magnetization contamination of paper partitions; the reversing trajectory segment of the guide groove 306 can be designed as an arc transition or a broken line with a buffer slope to ensure the smoothness of the flipping process and prevent the partition from being thrown off due to excessive instantaneous angular acceleration.

[0056] In terms of the drive system layout, a pallet motor 303 is fixedly installed on the outer wall of one side plate 202 of the mounting frame 301. A protective cover 320 is also installed on the mounting frame 301 on one side of the pallet motor 303. A pallet drive wheel 313 and a pallet driven wheel 312 are rotatably mounted on the side plate 202 of the mounting frame 301 inside the protective cover 320. The pallet drive wheel 313 and the pallet driven wheel 312 are driven by a pallet drive belt 311. The output end of the pallet motor 303 is connected to the pallet drive wheel 313. The pallet slide 309 is connected to the pallet drive belt 311. Placing the pallet motor 303 on the outer side wall of the mounting frame 301, rather than integrating it inside the frame or on top, is based on the dual considerations of maintenance convenience and space utilization. On the one hand, as a consumable part or a component requiring regular maintenance, the external layout of the motor allows maintenance personnel to perform repairs or replacements without entering narrow stacking areas or disassembling other functional modules, significantly shortening the average repair time. On the other hand, the protective cover 320 effectively isolates dust, paper scraps, or moisture from the production environment from entering the transmission system, ensuring long-term stable meshing of the synchronous belt and pulleys and extending the transmission life. Simultaneously, this side-mounted drive structure frees up space at the top of the mounting frame 301, providing ample human-machine interaction space for adjusting the aforementioned partition storage frame and avoiding interference from the drive components on the adjustment path. It should be understood that although this embodiment uses synchronous belt drive, in other embodiments, it can be replaced with chain drive or rack and pinion drive depending on load and accuracy requirements, as long as the reciprocating linear drive of the pallet slide 309 can be achieved.

[0057] Example 4

[0058] In this embodiment, the material tolerance and positioning system at the conveying end is further improved to ensure the reliability of quantitative conveying. A carding frame 203 is also fixedly installed on the side plate 202 at the input end of the conveying mechanism 2, and the carding frame 203 is located above the conveyor belt 205. Specifically, the carding frame 203 serves as the first physical shaping barrier for materials entering the quantitative conveying area. A gap channel is reserved between its lower end and the surface of the conveyor belt 205, allowing only a single product to pass through. When the upstream incoming material has a skewed posture, slight overlap, or disordered accumulation, the guide surface of the carding frame 203 will apply a passive correction force to the product, forcing the product to adjust to a regular posture consistent with the conveying direction before it can enter the subsequent station. This mechanical pre-sorting mechanism and the rigid separation function of the push block 206 on the conveyor belt 205 form a key synergistic effect: without the pre-shaping of the carding frame 203, skewed products are very likely to get stuck at the entrance of the push block 206 or cause the push block 206 to fail to properly embed into the separation position, thereby causing material jamming or counting errors. It should be understood that the specific form of the combing frame 203 is not limited to a flat plate. It can also be an inverted V-shaped diverter plate, multiple parallel guide rods, or a flexible comb structure with elastic buffer plates, as long as it can play a role in posture correction and height limitation for the products entering the conveyor belt 205.

[0059] A detection sensor 204 is also fixedly installed on the side plate 202 on one side of the carding rack 203, with the detection end of the detection sensor 204 facing the conveyor belt 205. This detection sensor 204 constitutes a real-time status monitoring node in the conveying process. In specific implementations, the detection sensor 204 can be a photoelectric switch, fiber optic sensor, or visual inspection camera, etc., and its installation position is usually set in the area after the carding rack 203 and before the pusher block 206 is fully engaged. The core function of the sensor is to sense the material passing status: when a continuous absence of material signal is detected, it is determined to be a material shortage and triggers a material replenishment prompt or downstream standby logic; when an abnormal obstruction duration or height change is detected, it is determined to be stacked material or foreign object intrusion and triggers emergency stop protection. It should be emphasized that the detection sensor 204 in this embodiment is only responsible for outputting a hardware trigger signal characterizing the presence or absence or status of material. The specific logic judgment and timing processing are completed by an external controller. This hardware-software decoupling design makes the sensing unit highly versatile and easy to replace. By placing the sensor behind the combing rack 203, false alarms caused by momentary chaos of inlet materials can be effectively avoided, ensuring the authenticity and effectiveness of the feedback signal.

[0060] A blocking cover 210 is fixedly installed on the side plate 202 at the extreme end of the output direction of the conveyor mechanism 2, and a discharge chute 211 is fixedly installed at the bottom of the blocking cover 210. This combined structure defines the terminal positioning reference of the products to be stacked. Specifically, the blocking cover 210 spans across the end of the conveyor belt 205, and its inner wall forms the absolute zero-point limiting surface of the product in the conveying direction. When the pusher block 206 conveys the product to the foremost position, the product is forced against the inner wall of the blocking cover 210, eliminating the longitudinal positioning deviation caused by the inertial sliding or stopping position error of the conveyor belt 205. At the same time, the discharge chute 211 is set at the bottom of the blocking cover 210, and its function is to provide bottom support and guidance after the product reaches the end point, preventing the product from falling or tilting forward while waiting for the pusher mechanism 4 to act. This dual constraint mechanism of "top blocking + bottom support" ensures that the product is at a uniquely determined spatial coordinate point before each pusher action is initiated. This is crucial for the precise operation of the subsequent pushing mechanism 4. If the product fluctuates randomly at the end of the conveying process, even with high repeatability, the pushing mechanism 4 cannot guarantee that the product will be accurately pushed into the pushing chute 321 of the stacking stand 319. Therefore, the baffle 210 and the discharge chute 211 are not just simple limiting parts, but also precision coupling interfaces connecting the dynamic conveying and static stacking processes. In practical applications, the inner wall of the baffle 210 can be lined with wear-resistant plates or buffer strips to reduce product impact noise and protect the product's appearance; the tilt angle of the discharge chute 211 can also be adjusted according to the product's coefficient of friction to optimize the stability of material retention.

[0061] Example 5

[0062] In this embodiment, the complete workflow of the multi-layer stacking box-in mechanism for packaging lines provided by the present invention and its specific application in multi-specification adaptation scenarios will be further elaborated in conjunction with the hardware structures of the foregoing embodiments. This embodiment aims to verify the collaborative operation logic between functional modules through dynamic timing and to visualize the flexible adjustment capability of the equipment in the face of differentiated packaging requirements. It should be understood that the process described below is only an illustrative example. In practical applications, the execution order, duration, and triggering conditions of each action can be adaptively adjusted according to the production cycle and product characteristics without departing from the technical concept of the present invention.

[0063] Taking a typical "one layer of product plus one layer of partition" alternating stacking cycle as an example, the workflow of this mechanism can be summarized as follows:

[0064] Step S100: Quantitative feeding and status confirmation. The conveying mechanism 2 is activated, and the pusher block 206 on the conveyor belt 205 conveys the products to be stacked forward at a fixed pitch. Before the products enter the quantitative conveying area, the combing rack 203 first physically shapes the material flow, removing abnormal postures such as skew or overlap. Subsequently, the detection sensor 204 senses the product's status in real time. The system only allows subsequent pushing actions to be executed when the sensor confirms that there is valid material at the current station and the posture is normal. If a lack of material or abnormality is detected, the pushing mechanism 4 is immediately paused and an alarm is issued to prevent empty pushing or jamming. This hardware signal-based interlocking mechanism ensures that each stacking action has a definite material basis. When the product is conveyed to the output end limit position, the blocking cover 210 and the discharge chute 211 together restrict it to a unique zero-point coordinate to be pushed, waiting for the transfer command.

[0065] Step S200, precise lateral transfer. Upon receiving the push signal, the pusher motor 402 drives the pusher slide 403 to move along the crossbeam of the inverted L-shaped mounting bracket 401 towards the stacking mechanism 3. The push rod 407, fixed on the slide, is then inserted between the two stacking uprights 319, with both ends of the push rod 407 sliding within the pusher groove 321. During this process, the pusher groove 321 provides rigid double-sided guiding constraints to the push rod 407, forcing the product to translate along a straight trajectory strictly perpendicular to the conveying direction, completely eliminating the deflection and squeezing risks common in cantilever pushers. After the product is smoothly pushed into the current layer's stacking space, the pusher slide 403 quickly resets, making way for the next feeding.

[0066] Step S300, adaptive accumulation of layer height. After each product is pushed in, the lifting driver 315 lowers the lifting pallet 318 and stacking uprights 319 by a preset layer height. It is important to emphasize that this "layer height" does not depend on the closed-loop control accuracy of the motor, but is defined by the physical spacing of the pushing grooves 321 on the stacking uprights 319. The lowering action of the lifting pallet 318 only needs to ensure that the next layer's pushing groove 321 is aligned with the pushing position. Even with minor positioning errors, it will not affect the inter-layer alignment because the vertical position of the product is always supported by the bottom surface of the groove. Simultaneously, the symmetrically distributed support tubes 326 and lifting guide rods 325 continuously provide anti-deflection support throughout the entire lifting process, ensuring dynamic stability under varying loads.

[0067] Step S400: Automatic partition placement. After the product layers are stacked, the transfer motor 303 drives the transfer carriage 309 to approach the bottom of the partition storage frame along the slide rail 305. During this process, the suction cup 322 flips, with its suction end facing the partition storage frame. Under negative pressure, the suction cup 322 picks up the bottom partition, and then the carriage moves in the opposite direction. On the return trip, the free end of the reversing arm 308 is constrained by the guide groove 306, causing the suction cup 322 to flip again to a vertical placement position. When the transfer carriage 309 reaches directly above the stacked upright plate 319, the suction cup 322 releases the partition, allowing it to fall precisely into the reserved space above the current product layer. This purely mechanical flipping process requires no additional rotation drive source, simplifying the control logic and ensuring a high degree of synchronization and reliability in the pick-and-place actions.

[0068] Step S500 involves iterative stacking and unloading. Steps S100 to S400 are repeated continuously until the preset number of stacking layers is reached. After the last layer of partitions is placed, the lifting tray 318 rises to the unloading height level with the unloading tray 327, and the blocking driver 316 then drives the lifting baffle 323 to fall. Subsequently, the pushing slide 403 moves and pushes the stacked products into the packaging box simultaneously through the push rods 407 fixed on it, which are the same number as the stacking uprights 319, completing the multi-layer stacking and boxing process. Then, it resets again for repeated filling.

[0069] In addition to the standard workflow described above, this invention also possesses excellent multi-specification adaptability, enabling rapid response to packaging requirements for products and partitions of different sizes. When changing product specifications, operators can make adjustments in the following ways:

[0070] To address changes in partition dimensions, simply loosen the locking mechanisms on the first adjusting frame 304 and the second adjusting frame 314, slide the first adjusting frame 304 along the adjusting slide bar 324 to adjust the width of the temporary storage frame, then slide the second adjusting frame 314 to adjust the depth of the temporary storage frame, and finally relock it. This two-dimensional sliding nested structure allows the same set of temporary storage frames to be compatible with partitions of various lengths and widths without the need to change tooling fixtures. It should be understood that although this embodiment describes a manual adjustment method, in other embodiments, a lead screw and nut pair, an electric push rod 407, or a servo motor can be integrated into the adjusting slide bar 324 or the adjusting frame to achieve automated remote adjustment of the temporary storage frame dimensions to meet the needs of fully automated flexible production lines.

[0071] To accommodate changes in product size or stacking layer count, the spacing between the stacking uprights 319 can be modularly adjusted according to the product width. This can be achieved by replacing shims of different thicknesses or using an adjustable clamping structure. Changes in the stacking layer count can be achieved simply by modifying the stroke parameters or counting threshold of the lifting drive 315 in the human-machine interface, without altering any mechanical structure. Furthermore, the spacing of the push blocks 206 on the conveyor mechanism 2 can also be replaced or adjusted according to the product length to match the new quantitative pitch. This combination of "mechanical quick adjustment plus electrical control setting" allows the equipment to complete changeovers in a very short time, significantly improving the flexibility of the production line and equipment utilization.

[0072] In summary, this embodiment, through the deep integration of dynamic processes and static structures, verifies the technical advantages of this invention in achieving efficient, precise, and stable stacking. The tight timing coordination and mechanical interlocking between various mechanisms not only ensure high-speed continuous production under a single specification but also provide a solid structural foundation for mixed-line production of multiple specifications. It should be understood that the above-described workflow and adjustment methods are merely illustrative examples. Any person skilled in the art can make equivalent substitutions or optimizations to the execution details of each action, the specific form of the adjustment mechanism, or the control logic without departing from the principles of this invention. All such changes should be covered within the scope of protection of this invention.

[0073] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of variations or substitutions within the technical scope disclosed in this invention, such as replacing the synchronous belt drive with a chain or rack and pinion drive, upgrading the manually adjustable partition temporary storage frame to an electric servo adjustment, or adaptively modifying the cross-sectional shape of the pusher chute 321, etc. Any equivalent structural transformation made using the description and drawings of this invention, or direct or indirect application in other related technical fields, should be covered within the scope of protection of this invention. Therefore, the scope of protection of this invention should be determined by the scope of the claims.

Claims

1. A multi-layer stacking box-in mechanism for a packaging line, comprising a support platform (1), characterized in that: The support platform (1) is provided with a conveying mechanism (2), a stacking mechanism (3) and a pushing mechanism (4). The conveying mechanism (2) is used to quantitatively convey products to be stacked. The stacking mechanism (3) is located on one side of the conveying mechanism (2), and the pushing mechanism (4) is located on the other side of the stacking mechanism (3), with its output end opposite to the stacking mechanism (3). When the pushing mechanism (4) outputs, it will transfer the products to be stacked on the conveying mechanism (2) to the stacking mechanism (3). The stacking mechanism (3) is used to cooperate with the pushing mechanism (4) to stack the products to be stacked from the conveying mechanism (2) to the stacking mechanism (3) layer by layer.

2. The multi-layer stacking box-in mechanism for a packaging line according to claim 1, characterized in that: The conveying mechanism (2) includes several support rods (201) fixed on the support platform (1). Two parallel side plates (202) are fixedly arranged on the support rods (201). A drive roller (209) and a driven roller (207) are rotatably arranged between the two side plates (202). The drive roller (209) and the driven roller (207) are connected by a conveyor belt (205). A conveyor motor (208) is fixedly arranged on one of the side plates (202). The output end of the conveyor motor (208) is connected to the drive roller (209). Several push blocks (206) are fixedly arranged on the conveyor belt (205). The products to be stacked are located between two adjacent push blocks (206) and move with the conveyor belt (205).

3. The multi-layer stacking box-in mechanism for a packaging line according to claim 2, characterized in that: The stacking mechanism (3) includes a mounting frame (301) disposed on the support platform (1). The mounting frame (301) has a "door" shaped structure, and two support plates are fixedly connected to the support platform (1). A fixed support (317) is disposed on the support platform (1) inside the mounting frame (301). A lifting driver (315) is fixedly disposed on the fixed support (317). A lifting tray (318) is disposed at the output end of the lifting driver (315). The lifting tray (318) is located on the fixed support (317). Above the lifting pallet (318), a plurality of stacked uprights (319) are provided on the lifting pallet (318). The stacked uprights (319) are parallel to each other and perpendicular to the conveying direction of the conveying mechanism (2). A plurality of pusher grooves (321) are respectively opened on the opposite side walls of adjacent stacked uprights (319). The pushing grooves (321) extend in a direction perpendicular to the conveying direction of the conveying mechanism (2) and parallel to the lifting pallet (318). The spacing between the plurality of pushing grooves (321) on the same stacked upright (319) is the same.

4. The multi-layer stacking box-in mechanism for a packaging line according to claim 3, characterized in that: The pushing mechanism (4) includes a mounting frame (401) fixed on the support platform (1). The mounting frame (401) is inverted "L" shape, with its top crossbeam located above the conveying mechanism (2) and its free end facing the stacking mechanism (3). A pushing drive wheel (404) and a pushing driven wheel (405) are provided on the crossbeam of the mounting frame (401). The pushing drive wheel (404) and the pushing driven wheel (405) are connected by a pushing drive belt (406). The crossbeam of the mounting frame (401) is also provided with The device is equipped with a pusher motor (402) and a pusher slide (403). The pusher motor (402) is fixedly connected to the mounting frame (401), and its output end is fixedly connected to the pusher drive wheel (404). The pusher slide (403) is slidably connected to the crossbeam of the mounting frame (401) and fixedly connected to the pusher drive belt (406). When the pusher motor (402) outputs, the pusher slide (403) will reciprocate along the crossbeam of the mounting frame (401) under the drive of the pusher drive belt (406).

5. A multi-layer stacking box-in mechanism for a packaging line according to claim 2, characterized in that: A combing frame (203) is also fixedly installed on the side plate (202) at the input end of the conveying mechanism (2). The combing frame (203) is located above the conveyor belt (205). A detection sensor (204) is also fixedly installed on the side plate (202) on one side of the combing frame (203). The detection end of the detection sensor (204) faces the conveyor belt (205). A blocking cover (210) is also fixedly installed on the side plate (202) at the output direction limit end of the conveying mechanism (2). A discharge chute (211) is also fixedly installed at the bottom of the blocking cover (210).

6. A multi-layer stacking box-in mechanism for a packaging line according to claim 3, characterized in that: A discharge bracket (327) is also fixedly installed on the mounting frame (301). The lifting plate (318) is located between the discharge bracket (327) and the conveying mechanism (2). A blocking driver (316) is also installed on the fixed support (317) below the discharge bracket (327). A lifting baffle (323) is fixedly installed at the output end of the blocking driver (316). The lifting baffle (323) is located between the lifting plate (318) and the discharge bracket (327). Two support tubes (326) are also fixedly installed on the fixed support (317). The two support tubes (326) are symmetrically distributed along the lifting driver (315). A lifting guide rod (325) is slidably installed in each support tube (326). The top end of the lifting guide rod (325) extends from the top of the support tube (326) and is fixedly connected to the bottom surface of the lifting plate (318).

7. A multi-layer stacking box-in mechanism for a packaging line according to claim 4, characterized in that: Two parallel adjusting slide rods (324) are fixedly installed on the crossbeam at the top of the mounting frame (301). Two first adjusting frames (304) are slidably installed on the adjusting slide rods (324). Each first adjusting frame (304) is provided with a fixed frame (302) and a second adjusting frame (314). The fixed frame (302) is fixedly connected to the first adjusting frame, and the fixed frames (302) on the two first adjusting frames (304) are positioned opposite each other. The second adjusting frame (314) is slidably connected to the first adjusting frame (304). The two fixed frames (302) on the two first adjusting frames (304) and the second adjusting frame (314) together form an adjustable partition temporary storage frame.

8. A multi-layer stacking box-in mechanism for a packaging line according to claim 7, characterized in that: Slide rails (305) are fixedly installed on a set of opposite inner walls of the mounting frame (301), and the two slide rails (305) are parallel to each other. A guide groove (306) is also provided on the inner wall of the mounting frame (301) on one side of the slide rail (305). A moving plate slide (309) is also provided between the two slide rails (305). A slider (307) and a mounting rod (310) are provided on the moving plate slide (309). The slider (307) slides with the slide rail (305). The mounting rod (310) is fixedly equipped with a reversing arm (308) and several suction cups (322). The free end of the reversing arm (308) is slidably engaged with the guide groove (306). When the pallet slide (309) slides back and forth along the slide rail (305), the suction cups (322) will flip under the cooperation of the reversing arm (308) and the guide groove (306) to move the partition in the partition temporary storage frame between the two stacked uprights (319).

9. A multi-layer stacking box-in mechanism for a packaging line according to claim 3, characterized in that: A pallet motor (303) is fixedly installed on the outer wall of one of the side plates (202) of the mounting frame (301). A protective cover (320) is also installed on the mounting frame (301) on one side of the pallet motor (303). A pallet drive wheel (313) and a pallet driven wheel (312) are rotatably installed on the side plate (202) of the mounting frame (301) inside the protective cover (320). The pallet drive wheel (313) and the pallet driven wheel (312) are driven by a pallet drive belt (311). The output end of the pallet motor (303) is connected to the pallet drive wheel (313). The pallet slide (309) is connected to the pallet drive belt (311).

10. A multi-layer stacking box-in mechanism for a packaging line according to claim 8, characterized in that: A push rod (407) is fixedly installed on the pusher slide (403). When the pusher slide (403) approaches the stacking mechanism (3), the push rod (407) will be inserted between the two stacking uprights (319), and the two ends of the push rod (407) will slide along the pusher grooves (321) on the two stacking uprights (319).

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