Stacking device for use in the production of cartons

Abstract

The present application relates to the technical field of packaging box production and processing, and particularly relates to a stacking device used in packaging box production and processing. The technical scheme comprises a conveying belt, a visual camera, a stacking mechanism and a clamping plate. The stacking mechanism comprises a limiting frame, a first supporting block, a second supporting block, a rack, a jacking mechanism, a pneumatic cylinder and a push plate. The pneumatic cylinder pushes the push plate to jack up the plastic box, the first supporting block is deflected to drive the rack to descend, the rack pushes and pulls the clamping plate through the support plate arranged obliquely to make the plastic box centered, one end of the support plate is hinged to the rack, and the other end is hinged to the clamping plate. The first supporting block and the second supporting block support materials in sequence. When the rack is reset, the upper plastic box is jacked up through the driving seat, the rotating shaft, the guide groove, the lifting seat and the top plate to form a material taking gap. The present application realizes stable stacking of the plastic box and convenient material taking through the linkage of jacking and centering, graded material supporting and automatic gap jacking.

Description

Technical Field

[0001] This invention relates to the field of packaging box production and processing technology, and specifically to a stacking device used in packaging box production and processing. Background Technology

[0002] In the production and processing of packaging boxes, blister packs typically undergo processes such as conveying, positioning, stacking, and material retrieval. Stacking devices are used to stack loose blister packs in layers, facilitating subsequent packaging, transfer, and automated material retrieval. The neatness, stability, and ease of material retrieval of the stacks affect the operating cycle and reliability of the entire production line.

[0003] Currently, this type of process mostly uses conveyor belt feeding, combined with visual or photoelectric detection to confirm position. After the blister packs arrive at the stacking station, they are lifted by a lifting device and then supported layer by layer by a supporting device. To reduce offset, some equipment is also equipped with centering or guiding devices. The above technical route can complete basic stacking, but in continuous, multi-layer, and high-speed operations, the following technical problems still exist: 1. Blister boxes are prone to lateral deviation during transport. This manifests as the blister box deviating from the centerline when it reaches the lifting position. The causes include differences in conveyor belt operation, material placement, and the independence of the centering and lifting actions. The consequence is uneven force on the blister box during lifting, which can lead to jamming, misalignment, or inaccurate entry into the stacking area, affecting continuous stacking.

[0004] 2. The material support component is prone to backing back under pressure. This manifests as the blister pack becoming unstable after being supported, and may even fall. The cause is that the material support component relies heavily on elastic elements to maintain its position, lacking reliable anti-backward restraint. The consequence is uneven stacking; stacked blister packs may become misaligned or collapse, requiring manual rearrangement.

[0005] 3. After stacking, the upper and lower blister packs fit together too tightly. This results in the material retrieval tray being difficult to insert between layers. The cause is the lack of controllable temporary gaps after the blister packs are stacked layer by layer. The consequences are that the material retrieval action is obstructed, the cycle time slows down, and the edges of the blister packs may be scratched or damaged.

[0006] 4. Insufficient synchronization between centering, lifting, and material support actions. The phenomenon is that the sequence of these actions is inconsistent. This is caused by the fact that centering, lifting, and material support are often performed by different drive components, making it difficult to unify control signals and action cycles. The consequences are a complex structure, increased control costs, and the possibility of the blister pack being lifted before it is properly aligned.

[0007] Therefore, how to provide a stacking device for packaging box production and processing is a problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a stacking device for packaging box production and processing, which solves the problems mentioned in the background art.

[0009] The solution of the present invention to the above-mentioned technical problems is as follows: This invention provides a stacking device for use in the production and processing of packaging boxes, comprising: The conveyor belt is equipped with a vision camera. A stacking mechanism is installed at one end of the conveyor belt, and a clamping plate is movably installed on the conveyor belt. The stacking mechanism includes a limiting frame, within which a first support block and a second support block are movably installed. The first support block is engaged with a rack and pinion drive, and the rack and pinion are movably connected to the clamping plate so that the clamping plate is driven to center the blister box when the rack and pinion are raised and lowered. A lifting mechanism is installed within the limiting frame, including a rotating shaft with a guide groove and a drive groove. The drive groove engages with a drive seat on the rack and pinion. A lifting seat is installed at the guide groove, and a top plate is installed on the lifting seat through a connecting plate. A cylinder is installed at the bottom of the stacking mechanism, and a push plate is installed at the output end of the cylinder.

[0010] Based on the above technical solution, the present invention can be further improved as follows.

[0011] Furthermore, a second support block is movably installed inside the limiting frame via a torsion spring, and a first support block is movably installed below the second support block inside the limiting frame; the back of the first support block is provided with locking teeth, and the first support block engages with the rack through the locking teeth.

[0012] The beneficial effects of adopting the above-mentioned further solutions are: The first and second support blocks can automatically return to their original positions under the action of torsion springs, making it easier to support the blister pack. When the first support block is deflected by the pressure of the blister pack, it drives the rack to rise and fall via the locking teeth. In this way, the material support action and the rack action are linked together, and the subsequent centering mechanism can share this power, eliminating the need for a separate drive source and making the action connection smoother.

[0013] Furthermore, a stop bar is installed inside the limiting frame behind the second support block. When the second support block supports the blister box, the stop bar blocks the second support block from rotating downwards in the opposite direction.

[0014] The beneficial effects of adopting the above-mentioned further solutions are: The stop bar restricts the reverse rotation of the second support block from behind. When the second support block holds the blister box, the pressure from the blister box will not cause the second support block to move backward. In this way, the material support position is more stable, the blister box is less likely to fall off the second support block, and the stacking support is more reliable.

[0015] Furthermore, a first limiting plate and a base plate are installed on the inner side of the limiting frame. A rack is installed inside the limiting frame through the first limiting plate and the base plate. A second limiting plate is provided on the back of the rack. A guide shaft is provided between the first limiting plate and the base plate. The second limiting plate is installed between the first limiting plate and the base plate through the guide shaft. A spring is provided on the guide shaft between the second limiting plate and the base plate. The rack is driven to reset by the spring.

[0016] The beneficial effects of adopting the above-mentioned further solutions are: The first limiting plate, the base plate, and the second limiting plate together restrict the movement range of the rack. A guide shaft provides linear guidance to the second limiting plate. A spring stores energy when the rack descends and releases it when the rack needs to return to its original position. This allows for controllable rack travel and automatic reset, reducing the need for additional reset mechanisms and resulting in more stable operation.

[0017] Furthermore, the rack is U-shaped, with its bottom end hinged to one end of the support plate. The support plate is inclined, and its other end is hinged to the clamping plate. The conveyor belt includes multiple parallel conveyor rollers, which pass through the clamping plate. The clamping plate can move along the axial direction of the conveyor rollers. When the rack is raised and lowered, the support plate swings around its hinge point with the rack, pushing and pulling the clamping plate to move along the axial direction of the conveyor rollers, thereby centering the blister pack placed on the conveyor belt.

[0018] The beneficial effects of adopting the above-mentioned further solutions are: The U-shaped rack and pinion structure is compact, facilitating the connection between the first support block and the support plate. During rack and pinion lifting, the support plate swings around the hinge point, and the push-pull clamping plate moves axially along the conveyor roller. The clamping plate pushes the blister pack from the side, bringing it closer to the centerline of the conveyor belt. This ensures the blister pack automatically centers before entering the push plate, reducing lifting failures caused by misalignment. The centering action shares power with the rack and pinion lifting, eliminating the need for a separate drive.

[0019] Furthermore, a fixed beam is provided on the upper part of the rack, and a drive seat is unidirectionally mounted on the fixed beam via ratchet. A lifting mechanism is rotatably mounted on the limit frame via the mounting seat. The lifting mechanism includes a rotating shaft, which is unidirectionally mounted on the mounting seat via ratchet. A guide groove and a drive groove are provided on the rotating shaft. The guide groove includes a spiral rising section, a circumferential holding section, and a vertical groove. The spiral rising section has a single thread groove structure, extending spirally along the circumference of the rotating shaft and rising axially, with the end of the spiral rising section at the highest position. The circumferential holding section extends circumferentially along the rotating shaft with a constant axial height, and the beginning of the circumferential holding section is connected to the end of the spiral rising section. The end of the circumferential holding section is connected to the beginning of the spiral rising section via the vertical groove. The drive groove meshes with the drive seat. A lifting seat is installed at the guide groove, and a connecting plate is installed on one side of the lifting seat. A top plate is installed at the end of the connecting plate via a torsion spring. The side of the lifting seat away from the connecting plate contacts the limit frame to prevent the lifting seat from rotating.

[0020] The beneficial effects of adopting the above-mentioned further solutions are: When the rack rises, the drive seat on the fixed beam engages with the drive groove, causing the rotating shaft to rotate in one direction. The guide groove on the rotating shaft converts the rotation into a linear upward movement of the lifting seat. The lifting seat drives the top plate via the connecting plate, and the top plate can lift the blister pack on the second support block. The unidirectional rotation of the ratchet allows the drive seat to idle when the rack descends, avoiding reverse interference. One side of the lifting seat is attached to the limit frame to prevent it from rotating with the rotating shaft. In this way, the lifting action is reliable, and the lifting seat can return to its original position along the vertical groove after the rotating shaft rotates one revolution.

[0021] Furthermore, a cylinder is installed at the bottom of the stacking mechanism, and a push plate is installed at the output end of the cylinder. The push plate is equipped with a limit post, which limits the position of the blister box. The blister box is conveyed to the push plate by a conveyor belt.

[0022] The beneficial effects of adopting the above-mentioned further solutions are: A cylinder drives a pusher plate to rise and fall, pushing the blister pack upwards. Limiting posts on the pusher plate restrict the position of the blister pack from the periphery. This prevents the blister pack from shifting on the pusher plate, making the lifting process more stable. The cylinder can repeat its action, facilitating continuous stacking. A conveyor belt delivers the blister pack to the pusher plate, which then feeds it into the material support mechanism, forming an automatic feeding and lifting system.

[0023] Furthermore, the limiting frame is equipped with limiting rods at the four corners of the blister box, which limit the blister box and prevent the stacked blister boxes from tilting.

[0024] The beneficial effects of adopting the above-mentioned further solutions are: Limiting rods restrict movement from the four corners of the blister pack. This restrains the corners as the blister pack rises and is placed. This prevents the blister packs from tilting during stacking, resulting in neater stacking. It also ensures more accurate positioning for subsequent material handling and placement.

[0025] Furthermore, after the blister box is conveyed to the push plate, the cylinder pushes the blister box upward through the push plate. The blister box pushes the first support block to deflect. At the same time, when the first support block deflects, it engages with the rack and drives the rack to descend. When the rack descends, it pushes the clamping plate to move through the support plate, pushing the blister box on the conveyor belt towards the center line of the conveyor belt, ensuring that the blister box is conveyed to the push plate. When the blister box is pushed above the first support block, the cylinder resets, the blister box presses down on the first support block, and is supported by the first support block until the blister box is lifted onto the second support block. The first support block deflects and drives the rack to rise and reset. The lifting distance of the rack is limited by the first limit plate, the second limit plate, and the bottom plate.

[0026] The beneficial effects of adopting the above-mentioned further solutions are: This process integrates lifting, centering, placement, and resetting into a single cycle. When the cylinder rises, the blister pack pushes open the first support block. The first support block lowers the rack, and the clamping plate pushes the subsequent blister pack towards the center line. This ensures the subsequent blister pack aligns with the push plate. After the cylinder resets, the first support block holds the blister pack. The subsequent blister pack then pushes it onto the second support block. When the first support block returns to its original position, it raises the rack. The rack's travel is limited by the first and second limit plates and the base plate. This clear sequence of actions eliminates the need for manual intervention, allowing for continuous stacking.

[0027] Furthermore, as the rack rises, it engages with the drive groove of the rotating shaft via a locking block within the drive seat, causing the rotating shaft to deflect. As the shaft rotates, it pushes the lifting seat upwards through the threaded groove of the guide groove. The lifting seat, connected to the top plate via a connecting plate, lifts the blister pack placed on the second support block, creating a gap between the blister packs above and below the second support block. This facilitates the insertion of the material retrieval bracket. After the rotating shaft continues to rotate or completes one revolution, the guide pin of the lifting seat enters the vertical groove connecting the beginning and end of the guide groove. The lifting seat then descends along the vertical groove to reset.

[0028] The beneficial effects of adopting the above-mentioned further solutions are: The upward force of the rack is used to drive the rotating shaft. The rotating shaft, via the guide groove, drives the lifting seat and the top plate to rise. The top plate lifts the blister pack on the second support block. This creates a gap between the upper and lower blister packs, allowing the material retrieval bracket to insert into the gap and retrieve the material. After the rotating shaft completes one revolution, the lifting seat descends along the vertical groove to return to its original position. The lifting action only occurs when needed, and then automatically resets without affecting the next cycle. This process utilizes the rack's reset power, eliminating the need for a separate lifting drive.

[0029] As can be seen, the stacking device provided by the present invention for use in the production and processing of packaging boxes has the following beneficial effects: This invention, through the use of a vision camera, clamping plate, first support block, locking teeth, rack, and support plate, enables automatic centering of blister packs on a conveyor belt, thus preventing the blister packs from deviating from the centerline during transport and failing to accurately enter the push plate. Specifically, when the blister pack is lifted by the push plate, it pushes the first support block to deflect. The first support block, through the locking teeth, drives the rack to descend, and the rack, in turn, pushes and pulls the clamping plate through the inclined support plate. The clamping plate pushes the blister pack on the conveyor belt towards the centerline. One end of the support plate is hinged to the rack, and the other end is hinged to the clamping plate, which is guided by multiple conveying rollers on the conveyor belt. This action is linked to the lifting action and does not require a separate centering drive, thus ensuring that subsequent blister packs can be stably delivered to the push plate position.

[0030] This invention, through the design of a first support block, a second support block, a stop bar, a limiting bar, and a torsion spring, enables tiered placement and corner positioning of blister packs, thereby preventing tilting, falling, or misalignment of the blister packs during stacking. The first support block initially holds the blister pack, and subsequent blister packs then push it onto the second support block. The second support block returns to its original position under the action of the torsion spring, and the stop bar prevents the second support block from deflecting in the opposite direction. The limiting bars are located at the four corners of the blister pack, restricting its lateral movement. In this way, the stacked blister packs remain neat and stable.

[0031] This invention, through its rack, drive seat, rotating shaft, guide groove, driving groove, lifting seat, connecting plate, and top plate, enables the automatic lifting of the upper layer of blister packs after stacking, thus avoiding the problems of the upper and lower blister packs being too tightly fitted and the material retrieval bracket being difficult to insert. When the rack rises, the drive seat engages with the driving groove, driving the rotating shaft to rotate. The guide groove on the rotating shaft pushes the lifting seat upwards. The lifting seat, through the connecting plate, drives the top plate to lift the blister pack on the second support block, creating a gap between the upper and lower blister packs. After the rotating shaft rotates one revolution, the lifting seat descends along the vertical groove to return to its original position. This allows the material retrieval bracket to be inserted into the gap, making material retrieval more convenient.

[0032] This invention, through the use of a spring, a first limiting plate, a second limiting plate, a base plate, a guide shaft, a cylinder, and a push plate, enables the rack to achieve lifting and limiting, as well as automatic reset, thus avoiding the problems of unstable stroke and the need for an additional reset mechanism. The spring, located between the second limiting plate and the base plate, drives the rack to reset. The first limiting plate, the second limiting plate, and the base plate together limit the lifting distance of the rack. The cylinder drives the push plate to rise and fall, and the limiting post on the push plate restricts the position of the blister pack. In this way, the device can continuously cycle in the sequence of lifting, placing, resetting, and then lifting again, ensuring reliable operation. Attached Figure Description

[0033] The accompanying drawings, which are provided to further illustrate the invention and constitute a part of this invention, are illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention.

[0034] In the attached diagram: Figure 1 This is a schematic diagram of the main appearance of the present invention; Figure 2 This is a rear view diagram of the present invention; Figure 3 This is a schematic diagram of the lifting mechanism structure of the present invention; Figure 4 This is a schematic diagram of the blister pack stacking according to the present invention; Figure 5 This is a schematic diagram of the exploded main view of the lifting mechanism of the present invention; Figure 6 This is a schematic diagram of the lifting mechanism of the present invention after an explosion.

[0035] The attached diagram lists the components represented by each number as follows: 1. Vision camera; 2. Stacking mechanism; 201. Limiting frame; 202. Limiting rod; 203. Blister box; 204. Lifting mechanism; 205. Push plate; 206. Limiting post; 207. Cylinder; 208. Stop bar; 209. Mounting base; 210. Rotating shaft; 211. Lifting seat; 212. Connecting plate; 213. Rack; 214. Top plate; 215. Clamping tooth; 216. First support block; 217. Second support block; 218. Fixed beam; 219. Drive seat; 220. First limiting plate; 221. Second limiting plate; 222. Spring; 223. Base plate; 224. Support plate; 225. Guide groove; 226. Drive groove; 3. Conveyor belt; 301. Clamping plate. Detailed Implementation

[0036] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Please see Figures 1 to 6 As shown, the embodiments provided by the present invention are as follows: Example 1 This embodiment provides a stacking device for packaging box production. The device includes a conveyor belt 3. A vision camera 1 is mounted on the conveyor belt 3. The vision camera 1 is used to detect blister packs 203 on the conveyor belt 3. A stacking mechanism 2 is installed at one end of the conveyor belt 3. A clamping plate 301 is movably mounted on the conveyor belt 3. The clamping plate 301 is used to adjust the position of the blister packs 203 on the conveyor belt 3.

[0038] The stacking mechanism 2 includes a limiting frame 201. A second support block 217 is movably mounted inside the limiting frame 201 via a torsion spring. A first support block 216 is movably mounted inside the limiting frame 201 below the second support block 217. The back of the first support block 216 is provided with a locking tooth 215. The first support block 216 engages with a rack 213 via the locking tooth 215. A stop bar 208 is installed inside the limiting frame 201 behind the second support block 217. When the second support block 217 supports the blister box 203, the stop bar 208 blocks it, preventing the second support block 217 from deflecting.

[0039] A first limiting plate 220 and a base plate 223 are installed on the inner side of the limiting frame 201. A rack 213 is installed inside the limiting frame 201 and limited by the first limiting plate 220 and the base plate 223. A second limiting plate 221 is provided on the back of the rack 213. A guide shaft is provided between the first limiting plate 220 and the base plate 223. The second limiting plate 221 is limited and installed between the first limiting plate 220 and the base plate 223 by the guide shaft. A spring 222 is provided on the guide shaft between the second limiting plate 221 and the base plate 223. The rack 213 is driven to reset by the spring 222. The rack 213 is U-shaped. A support plate 224 is inclinedly disposed between the rack 213 and the clamping plate 301. The upper end of the support plate 224 is hinged to the bottom end of the rack 213 by a pin, and the lower end of the support plate 224 is hinged to the clamping plate 301 by a pin. The conveyor belt 3 includes multiple parallel conveyor rollers that pass through a clamping plate 301, which can only move axially along the conveyor rollers. When the rack 213 rises and falls, the support plate 224 swings around its hinge point with the rack 213, converting the vertical movement of the rack 213 into the lateral movement of the clamping plate 301, thereby pushing and pulling the clamping plate 301. The clamping plate 301 pushes the blister pack 203 laterally, causing it to move closer to the centerline of the conveyor belt 3.

[0040] A fixed beam 218 is provided on the upper part of the rack 213. A drive seat 219 is rotatably mounted on the fixed beam 218 via ratchet. A lifting mechanism 204 is rotatably mounted on the limit frame 201 via the mounting seat 209. The lifting mechanism 204 includes a rotating shaft 210. The rotating shaft 210 is rotatably mounted on the mounting seat 209 via ratchet. A guide groove 225 and a drive groove 226 are provided on the rotating shaft 210. The guide groove 225 includes a spiral rising section, a circumferential holding section, and a vertical groove; the spiral rising section has a single threaded groove structure, extends spirally along the circumference of the rotating shaft 210 and rises axially, with the end of the spiral rising section at the highest position; the circumferential holding section extends circumferentially along the rotating shaft 210 with a constant axial height, and the beginning of the circumferential holding section is connected to the end of the spiral rising section; the end of the circumferential holding section is connected to the beginning of the spiral rising section via the vertical groove. The drive groove 226 meshes with the drive seat 219. A lifting seat 211 is installed at the guide groove 225. A connecting plate 212 is installed on one side of the lifting seat 211. A top plate 214 is installed at the end of the connecting plate 212 via a torsion spring. The side of the lifting seat 211 facing away from the connecting plate 212 contacts the limit frame 201 to prevent the lifting seat 211 from rotating.

[0041] The transmission relationship between the drive seat 219 and the drive groove 226, and the stroke of the guide groove 225, are configured such that for each blister pack 203 stacked on the second support block 217, the rotating shaft 210 rotates through a set angle. When the number of blister packs 203 on the second support block 217 reaches a predetermined quantity, the rotating shaft 210 rotates to position the lifting seat 211 at the highest position of the guide groove 225. At this time, the top plate 214 lifts the stack of blister packs 203 on the second support block 217, facilitating material retrieval and achieving quantitative stacking.

[0042] A cylinder 207 is installed at the bottom of the stacking mechanism 2. A push plate 205 is installed at the output end of the cylinder 207. A limiting post 206 is provided on the push plate 205. The push plate 205 limits the position of the blister box 203 through the limiting post 206. The blister box 203 is conveyed onto the push plate 205 by the conveyor belt 3. A limiting rod 202 is provided at the four corners of the blister box 203 inside the limiting frame 201. The limiting rod 202 limits the blister box 203 to prevent the stacked blister boxes 203 from tilting.

[0043] Example 2 This embodiment further discloses that the first support block 216 forms a power multiplexing chain for centering power acquisition, mechanical counting and indexing, and final clearance during a single pressure deflection and reset cycle. The first support block 216 is not only used for material support but also serves as the common mechanical trigger point for the centering action, counting and indexing action, and clearance action. A single mechanical action of the first support block 216 includes a deflection stroke where it is pushed open and deflected by the blister pack 203, and a reset stroke where it is driven back to its original position by a torsion spring after the blister pack 203 has passed over it. The deflection stroke is used for centering power acquisition, and the reset stroke is used for indexing power acquisition and clearance power acquisition.

[0044] The power acquisition section is as follows. Initially, the first support block 216 is in a horizontal material-supporting position. The first support block 216 engages with the rack 213 via the locking teeth 215. The rack 213 is in an upper position under the action of the spring 222. The support plate 224 at the bottom of the rack 213 drives the clamping plate 301 to the initial position on one side of the conveyor belt 3. When the cylinder 207 lifts the blister box 203 upwards via the push plate 205, the blister box 203 contacts and pushes the first support block 216. The first support block 216 deflects against the torsion spring. When the first support block 216 deflects, the rotational motion is converted into the linear downward motion of the rack 213 through the engagement of the locking teeth 215 and the rack 213. When the rack 213 descends, it pushes and pulls the clamping plate 301 laterally along the conveyor roller axis of the conveyor belt 3 via the inclined support plate 224. One end of the support plate 224 is hinged to the rack 213, and the other end is hinged to the clamping plate 301, which is guided by multiple conveyor rollers. The clamping plate 301 pushes the subsequent blister pack 203 on the conveyor belt 3 toward the centerline of the conveyor belt 3. This achieves automatic centering of the subsequent blister pack 203. During this process, the rack 213 descends while compressing the spring 222. The spring 222 stores reset energy. Therefore, the deflection stroke of the first support block 216 not only completes the feeding action of the blister pack 203, but also simultaneously obtains the centering power and completes the energy storage of the spring 222. This centering power comes directly from the lifting force of the blister pack 203. This solution does not require a separate centering cylinder, centering motor, or electronic control synchronization mechanism. The centering action and the lifting action are naturally synchronized. This avoids the problem of the blister pack 203 being lifted before it is centered.

[0045] The mechanical counting indexing segment is as follows. After the blister pack 203 passes the first support block 216, the cylinder 207 retracts. The blister pack 203 falls. The first support block 216 returns to its original position under the action of the torsion spring and supports the blister pack 203. When the first support block 216 returns to its original position, it drives the rack 213 through the locking teeth 215. The rack 213 rises and resets under the release action of the spring 222. When the rack 213 rises, the drive seat 219 on the upper fixed beam 218 of the rack 213 engages unidirectionally with the drive groove 226 on the rotating shaft 210. When the fixed beam 218 rises, the drive seat 219, through its internal locking block, engages with the drive groove 226 to drive the rotating shaft 210 to rotate through a set indexing angle. When the rack 213 falls, because the drive seat 219 is mounted on the fixed beam 218 through unidirectional rotation via ratchet teeth, the drive seat 219 rotates freely relative to the rotating shaft 210. The drive seat 219 does not drive the rotating shaft 210 to rotate in the opposite direction. Therefore, the rotating shaft 210 only rotates in one direction. The accumulated indexing angle will not be lost due to the descent of the rack 213. Each time the first support block 216 completes a material feeding and return cycle, and each time a blister pack 203 is added to the second support block 217, the rotating shaft 210 is mechanically driven to rotate through a set indexing angle. This indexing action does not rely on the vision camera 1 or an external counting sensor. This indexing action is directly achieved by the return stroke of the first support block 216, the rising stroke of the rack 213, and the unidirectional meshing relationship between the drive seat 219 and the drive groove 226. This indexing action constitutes a purely mechanical counting indexing. The vision camera 1 can be used only for incoming material detection. The mechanical counting indexing strictly corresponds to the number of stacking actions. This scheme has strong anti-interference capabilities and stable cycle time.

[0046] The final clearance section is as follows. A guide groove 225 and a drive groove 226 are provided on the rotating shaft 210. The guide groove 225 is a single-threaded groove. The guide groove 225 is connected end-to-end by a vertical groove. The lifting seat 211 is installed in the guide groove 225. The guide pin on the inner side of the lifting seat 211 is embedded in the guide groove 225. The side of the lifting seat 211 facing away from the connecting plate 212 contacts the limiting frame 201. This prevents the lifting seat 211 from rotating with the rotating shaft 210. A top plate 214 is installed on the lifting seat 211 via the connecting plate 212. The top plate 214 is unidirectionally installed at the end of the connecting plate 212 via a torsion spring. Each time the rotating shaft 210 rotates through a division angle, the threaded section of the guide groove 225 pushes the lifting seat 211 to gradually rise along the axial direction of the rotating shaft 210. The lifting seat 211 drives the top plate 214 to rise via the connecting plate 212. When the number of blister packs 203 on the second support block 217 reaches a predetermined quantity N, the rotating shaft 210 has completed one full rotation. The lifting seat 211 reaches the highest position of the threaded section of the guide groove 225. At this time, the top plate 214 lifts the blister packs 203 on the second support block 217. A material-retrieving gap is created between the blister packs 203 above and below the second support block 217. Alternatively, the entire stack of blister packs 203 can be lifted. This facilitates the insertion of the material-retrieving bracket for material retrieval. When the lifting seat 211 reaches the highest position of the spiral rising section, the rotating shaft 210 can stop rotating, and the top plate 214 remains lifted. When the rotating shaft 210 continues to rotate, the guide pin of the lifting seat 211 first enters the circumferential holding section. Within the set holding angle, the axial height of the lifting seat 211 remains unchanged, and the top plate 214 continues to remain in the lifted position. When the rotating shaft 210 rotates past the set holding angle, the guide pin of the lifting seat 211 enters the vertical groove of the guide groove 225 and descends along the vertical groove to reset. The top plate 214 then resets. The top plate 214 is ready for the next stack. Therefore, the final clearance action is not performed by a separate lifting cylinder or motor. The final clearance action is automatically triggered by the upward stroke of the rack 213 driven by the return of the first support block 216, which is transmitted step by step through the drive seat 219, drive groove 226, rotating shaft 210, guide groove 225, lifting seat 211, connecting plate 212, and top plate 214.

[0047] The closed loop of the power reuse chain is as follows. A single cycle of pressure deflection and reset of the first support block 216 forms the following power reuse chain: The lifting force of the blister box 203 acts on the first support block 216. The first support block 216 deflects. The first support block 216 drives the rack 213 to descend via the locking teeth 215. The rack 213 drives the clamping plate 301 to move laterally via the support plate 224. The clamping plate 301 completes centering. Simultaneously, the spring 222 compresses and stores energy. After the blister box 203 passes the first support block 216, the torsion spring returns the first support block 216 to its original position. The first support block 216 drives the rack 213 via the locking teeth 215. The rack 213 rises as the spring 222 releases. The rack 213 drives the drive seat 219 via the fixed beam 218. The drive seat 219 drives the rotating shaft 210 for mechanical indexing via the drive groove 226. The rotating shaft 210 drives the lifting seat 211 via the guide groove 225. The lifting seat 211 lifts the top plate 214 via the connecting plate 212. The top plate 214 completes its final clearance. After the rotating shaft 210 completes one revolution, the guide pin enters the vertical groove. The lifting seat 211 descends and resets. In this power reuse chain, the centering power acquisition occurs during the deflection stroke of the first support block 216. The mechanical counting and indexing occur during the return stroke of the first support block 216. The final clearance occurs at the end of the return stroke after the indexing has accumulated to a predetermined number. The three functions share the same mechanical action of the first support block 216. This scheme does not require separate centering drive, counting sensor, and clearance drive. The timing of each action is hard-constrained by the meshing relationship between the locking teeth 215 and the rack 213, the one-way locking relationship between the drive seat 219 and the drive groove 226, and the thread lift and vertical groove reset relationship of the guide groove 225. This scheme forms a mechanical hard synchronization. This scheme reduces electrical control synchronization errors and the number of independent drive components. This scheme improves the reliability of continuous stacking and material handling.

[0048] Example 3 Based on Embodiment 1, this embodiment further defines the structural form, assembly connection, spatial position and function of each component.

[0049] The first support block 216 is movably mounted within the limiting frame 201 via a torsion spring. The second support block 217 is movably mounted within the limiting frame 201 via a torsion spring. The stop bar 208 is fixedly mounted within the limiting frame 201, located behind the second support block 217. The first limiting plate 220 and the base plate 223 are fixed to the inner side of the limiting frame 201 by screws. Two guide shafts are provided, arranged in parallel. The spring 222 is a compression spring. The second limiting plate 221 slides along the guide shaft. One end of the spring 222 abuts against the second limiting plate 221, and the other end abuts against the base plate 223.

[0050] The rack 213 is U-shaped and includes two vertical arms and a crossbeam connecting the two vertical arms. Teeth are provided on the vertical arms of the rack 213. The locking teeth 215 on the first support block 216 mesh with the teeth of the rack 213. A support plate 224 is inclinedly disposed between the rack 213 and the clamping plate 301. The upper end of the support plate 224 is hinged to the bottom end of the rack 213, and the lower end of the support plate 224 is hinged to the clamping plate 301. The conveyor belt 3 includes multiple parallel conveyor rollers, which pass through the clamping plate 301, allowing the clamping plate 301 to move axially along the conveyor rollers. A fixed beam 218 is fixed to the upper part of the rack 213. A drive seat 219 is mounted on the fixed beam 218 via a ratchet mechanism. When the fixed beam 218 rises, the drive seat 219 meshes with the drive groove 226 of the rotating shaft 210. When the fixed beam 218 descends, the drive seat 219 rotates freely relative to the rotating shaft 210.

[0051] Preferably, the threaded section of the guide groove 225 corresponds to one revolution of the rotating shaft 210, and the vertical groove connects the beginning and end of the threaded section. For each additional blister pack 203 added to the second support block 217, the rotating shaft 210 rotates one increment. When there are N blister packs 203 on the second support block 217, the rotating shaft 210 has completed one revolution, the lifting seat 211 rises to its highest position, and the top plate 214 lifts the entire stack of blister packs 203, achieving quantitative stacking. The rotation increment of the rotating shaft 210 can be set by adjusting the number of ratchet teeth on the drive seat 219, the number of slots in the drive groove 226, or the pitch of the guide groove 225, thereby setting the predetermined stacking quantity.

[0052] Mounting base 209 is fixed to limiting frame 201. Rotating shaft 210 is mounted on mounting base 209 via a ratchet mechanism for unidirectional rotation. Rotating shaft 210 can only rotate in one direction. Guide groove 225 is a single-threaded groove. The beginning and end of guide groove 225 are connected by vertical grooves. Lifting seat 211 is fitted onto rotating shaft 210. A guide pin is provided on the inner side of lifting seat 211. The guide pin is embedded in guide groove 225. One side of lifting seat 211 contacts the side wall of limiting frame 201, restricting the rotation of lifting seat 211. Connecting plate 212 is fixed to lifting seat 211. Top plate 214 is mounted on the end of connecting plate 212 via a torsion spring. Top plate 214 can deflect in one direction.

[0053] Cylinder 207 can be replaced with a hydraulic cylinder or an electric push rod. Vision camera 1 can be replaced with a photoelectric sensor or a laser sensor. Limit rod 202 is adjustablely mounted on limit frame 201. Four limit posts 206 are set on push plate 205, corresponding to the four corners of blister box 203 respectively. First limit plate 220, second limit plate 221, and base plate 223 together limit the lifting stroke of rack 213. Spring 222 drives rack 213 to reset.

[0054] Example 4 Initial state: Cylinder 207 is in the retracted position. Push plate 205 is in the low position. Rack 213 is in the upper position under the action of spring 222. Clamping plate 301 is located on one side of conveyor belt 3. First support block 216 and second support block 217 are in the horizontal material-supporting position under the action of torsion spring. Stop bar 208 prevents the second support block 217 from deflecting in the opposite direction.

[0055] Feeding status: Conveyor belt 3 transports blister box 203 to above push plate 205. Limit post 206 restricts the position of blister box 203. Vision camera 1 detects that blister box 203 has reached its designated position.

[0056] Lifting state: Cylinder 207 extends. Push plate 205 pushes blister box 203 upward. Blister box 203 contacts first support block 216 and pushes first support block 216 to deflect. First support block 216 drives rack 213 downward through clamping teeth 215. Rack 213 pushes and pulls clamping plate 301 along the conveyor roller axis through inclined support plate 224. Clamping plate 301 centers subsequent blister boxes 203. Spring 222 is compressed.

[0057] In the placement state: After the blister pack 203 passes the first support block 216, the cylinder 207 retracts. The blister pack 203 falls. The first support block 216 returns to its original position under the action of the torsion spring, supporting the blister pack 203. The rack 213 rises and resets under the action of the spring 222.

[0058] Stacking status: Subsequent blister packs 203 continue to be lifted by the push plate 205. Subsequent blister packs 203 push the blister packs 203 on the first support block 216 upwards. The blister packs 203 reach the position of the second support block 217. The blister packs 203 push open the second support block 217. The second support block 217 returns to its original position under the action of the torsion spring, supporting the blister packs 203. The stop lever 208 prevents the second support block 217 from rotating downwards in the opposite direction.

[0059] Material preparation state: When rack 213 rises, drive seat 219 on fixed beam 218 engages with drive groove 226 of rotating shaft 210. Drive seat 219 drives rotating shaft 210 to rotate. For each blister pack 203 added to second support block 217, rotating shaft 210 rotates through a set angle. When the number of blister packs 203 on second support block 217 reaches a predetermined number, rotating shaft 210 rotates to the highest position that lifts lifting seat 211. At this time, top plate 214 lifts the stack of blister packs 203 on second support block 217. A gap is created between the blister packs 203 on second support block 217 and the blister packs 203 below, or the stack of blister packs 203 is lifted as a whole, facilitating the insertion of material picker to pick up materials and achieve quantitative stacking effect. After rotating shaft 210 continues to rotate, lifting seat 211 enters the vertical groove of guide groove 225 and descends to reset.

[0060] Cycle status: Cylinder 207 actuates again, entering the next cycle.

[0061] Example 5 This embodiment provides an alternative to key components.

[0062] Cylinder 207 can be replaced with a hydraulic cylinder, electric push rod, cam mechanism, or crank-slider mechanism. Vision camera 1 can be replaced with a photoelectric switch, proximity switch, laser rangefinder, or CCD camera. Torsion spring can be replaced with a spring sheet, tension spring, or torsion spring. The meshing of rack 213 with the first support block 216 can be replaced with a gear and rack mechanism, linkage mechanism, or cam mechanism. The ratchet unidirectional rotation structure of drive seat 219 and rotating shaft 210 can be replaced with an overrunning clutch, one-way bearing, or ratchet-pawl mechanism. The single threaded groove of guide groove 225 can be replaced with a cam groove, helical groove, or curved groove. Spring 222 can be replaced with a gas spring, rubber spring, or disc spring. Limiting rod 202 can be replaced with a limiting block, limiting post, or limiting plate. Clamping plate 301 can be replaced with a push plate, lever, or guide plate. The limiting methods of the first limiting plate 220, the second limiting plate 221, and the base plate 223 can be replaced with a guide rail-slider mechanism or a linear bearing mechanism. The rotational indexing of the shaft 210 can be adjusted by changing the number of ratchet teeth in the drive seat 219, the number of slots in the drive groove 226, or the pitch of the guide groove 225. This allows setting a predetermined stacking quantity on the second support block 217. A vision camera 1 or several external components can be used to confirm the quantity of the blister packs 203. When the quantity reaches the predetermined value, the top plate 214 lifts the blister packs 203 on the second support block 217, achieving quantitative stacking.

[0063] Example 6 Based on Embodiment 2, this embodiment further discloses the quantitative stacking parameter configuration of the power reuse chain. Let N be the predetermined stacking quantity on the second support block 217. Each time the first support block 216 completes its return, the rotating shaft 210 rotates through a division angle θ. The total angle corresponding to the spiral rising section is N×θ. When the Nth blister box 203 is supported by the second support block 217, the rotating shaft 210 has cumulatively rotated through the total angle of the spiral rising section, and the lifting seat 211 reaches the highest position of the spiral rising section. The top plate 214 lifts the blister box 203 on the second support block 217, forming a material picking gap h. At this time, the rotating shaft 210 can stop rotating, and the top plate 214 remains lifted. When the rotating shaft 210 continues to rotate, the lifting seat 211 first enters the circumferential holding section, which corresponds to a set holding angle α. Within the set holding angle α, the axial height of the lifting seat 211 remains unchanged, and the top plate 214 continues to remain in the lifted position, thus maintaining the material picking gap h. After the rotating shaft 210 rotates past the set holding angle α, the lifting seat 211 enters the vertical groove and descends to reset. The indexing angle θ, holding angle α, and vertical groove reset angle can be set by at least one of the number of ratchet teeth of the drive seat 219, the number of grooves of the drive groove 226, and the pitch of the guide groove 225. This allows setting the predetermined stacking quantity N on the second support block 217 and the material handling gap holding time. The total lift H of the spiral rising section of the guide groove 225 and the required material handling gap h satisfy H being greater than or equal to h. The lifting seat 211 prepares for the next stack. The axial length of the vertical groove and the reset method can be set according to the weight of the lifting seat 211, the connecting plate 212, and the top plate 214, as well as the torsion spring reset force. The top plate 214 quickly moves aside after material handling. The top plate 214 does not affect the next cycle.

[0064] Thus, each mechanical action of the first support block 216 is sequentially reused for centering power acquisition, mechanical counting and indexing, and final clearance. The deflection stroke acquires and stores centering power. The return stroke drives mechanical counting and indexing. After the indexing accumulates to a predetermined number, the final clearance is automatically triggered.

[0065] Working principle: The blister pack 203 is conveyed forward by the conveyor belt 3. A vision camera 1 is mounted above the conveyor belt 3. The vision camera 1 identifies the incoming material and confirms its position. A stacking mechanism 2 is installed at one end of the conveyor belt 3. A clamping plate 301 is movably mounted on the conveyor belt 3. The clamping plate 301 is used to adjust the lateral position of the blister pack 203 on the conveyor belt 3.

[0066] The blister pack 203 is conveyed to the area of ​​the push plate 205 below the stacking mechanism 2. The push plate 205 is equipped with limit posts 206. The limit posts 206 block the blister pack 203, stopping it in a set position. Limiting rods 202 are located at the four corners of the blister pack 203 within the limiting frame 201. The limiting rods 202 constrain the blister pack 203 from the four corners, preventing it from shifting or tilting during stacking. At this time, the cylinder 207 at the bottom of the stacking mechanism 2 begins to operate. The cylinder 207 drives the push plate 205 to rise. The push plate 205 pushes the blister pack 203 upwards.

[0067] When the blister pack 203 rises, it first contacts the first support block 216. The first support block 216 is movably installed within the limiting frame 201. The blister pack 203 pushes the first support block 216 to deflect. The first support block 216 engages with the rack 213 via the locking teeth 215. When the first support block 216 deflects, it causes the rack 213 to descend. The rack 213 is U-shaped. The bottom end of the rack 213 is hinged to one end of the support plate 224, which is inclined. The other end of the support plate 224 is hinged to the clamping plate 301. The conveyor belt 3 includes multiple parallel conveyor rollers that pass through the clamping plate 301. When the rack 213 descends, the support plate 224 swings around the hinge point, pushing and pulling the clamping plate 301 to move axially along the conveyor rollers. The clamping plate 301 pushes the blister pack 203 on the conveyor belt 3 toward the centerline. In this way, subsequent blister packs 203 can be aligned with the push plate 205. This action links the lifting and centering processes together, eliminating the need for a separate drive.

[0068] The rack 213 is limited by a first limiting plate 220, a base plate 223, and a second limiting plate 221. The second limiting plate 221 is located on the back of the rack 213. A guide shaft is provided between the first limiting plate 220 and the base plate 223. The second limiting plate 221 moves along the guide shaft. A spring 222 is located between the second limiting plate 221 and the base plate 223. The spring 222 is used to drive the rack 213 to reset. The lifting distance of the rack 213 is limited by the first limiting plate 220, the second limiting plate 221, and the base plate 223.

[0069] After the blister pack 203 is pushed above the first support block 216, the cylinder 207 resets. The blister pack 203 falls. The first support block 216 returns to its original position under the action of the torsion spring and supports the blister pack 203. Subsequently, the blister pack 203 continues to be lifted by the push plate 205. The blister pack 203 on the first support block 216 is pushed upwards. The blister pack 203 reaches the position of the second support block 217. The second support block 217 is movably mounted in the limit frame 201 by the torsion spring. The blister pack 203 pushes open the second support block 217. The second support block 217 then supports the blister pack 203. The stop bar 208 is located behind the second support block 217. The stop bar 208 prevents the second support block 217 from reversing. In this way, the second support block 217 can stably support the blister pack 203 and prevent the blister pack 203 from falling.

[0070] When the first support block 216 completes its placement and returns to its original position, the rack 213 rises and resets under the action of the spring 222. As the rack 213 rises, it drives the drive seat 219 on the fixed beam 218. The drive seat 219 is mounted on the fixed beam 218 via a ratchet mechanism that allows for unidirectional rotation. A locking block inside the drive seat 219 engages with the drive groove 226 on the rotating shaft 210. The drive seat 219 pushes the rotating shaft 210 to deflect. The rotating shaft 210 is mounted on the mounting base 209 via a ratchet mechanism that allows for unidirectional rotation. The lifting mechanism 204 includes the rotating shaft 210. A guide groove 225 and a drive groove 226 are formed on the rotating shaft 210. The guide groove 225 is a single-threaded groove. The guide groove 225 is connected end-to-end by vertical grooves. The lifting seat 211 is mounted in the guide groove 225. One side of the lifting seat 211 contacts the limit frame 201. This prevents the lifting seat 211 from rotating.

[0071] When the rotating shaft 210 rotates, the threaded groove of the guide groove 225 pushes the lifting seat 211 upward. The lifting seat 211 drives the top plate 214 through the connecting plate 212. The top plate 214 is mounted on the end of the connecting plate 212 by a torsion spring. When the top plate 214 rises, it lifts the blister box 203 on the second support block 217. The blister box 203 above the second support block 217 is lifted, creating a gap between it and the blister box 203 below. The material retrieval bracket can be inserted into this gap to retrieve the material.

[0072] For each blister pack 203 stacked on the second support block 217, the rotating shaft 210 rotates through a predetermined angle. This angle corresponds to the predetermined stacking quantity. When the predetermined number of blister packs 203 stacked on the second support block 217 is reached, the rotating shaft 210 rotates to the highest position, lifting the lifting seat 211. At this time, the top plate 214 lifts the blister packs 203 on the second support block 217. In this way, the stacking quantity corresponds to the lifting action, achieving the effect of quantitative stacking. After material removal, the rotating shaft 210 continues to rotate, and the lifting seat 211 first enters the circumferential holding section of the guide groove 225, while the top plate 214 remains in the lifted position. After the rotating shaft 210 rotates through the predetermined holding angle, the lifting seat 211 enters the vertical groove of the guide groove 225 and descends to reset, ready for the next stack.

[0073] Then cylinder 207 actuates again, entering the next cycle. Push plate 205 descends and prepares to receive the next blister box 203. Rack 213 returns to its initial position under the action of spring 222. Clamping plate 301 also swings back to its initial position with support plate 224. Second support block 217 maintains its supporting state under the action of torsion spring and stop bar 208. Vision camera 1 continues to detect incoming material. Conveyor belt 3 continues to feed material. The device continuously completes the conveying, centering, lifting, placing, stacking, quantitative lifting, and material preparation of blister boxes 203 according to the above process.

[0074] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0075] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A stacking device for use in the production and processing of packaging boxes, characterized in that, include: A conveyor belt (3) is provided with a visual camera (1). A stacking mechanism (2) is installed at one end of the conveyor belt (3). A clamping plate (301) is movably installed on the conveyor belt (3). The stacking mechanism (2) includes a limiting frame (201). A first support block (216) and a second support block (217) are movably installed inside the limiting frame (201). The first support block (216) is driven by a rack (213). The rack (213) is movably connected to the clamping plate (301) so that when the rack (213) rises or falls, it drives the clamping plate (301) to center the blister box (203). The limit frame (201) is equipped with a lifting mechanism (204). The lifting mechanism (204) includes a rotating shaft (210). The rotating shaft (210) is provided with a guide groove (225) and a drive groove (226). The drive groove (226) cooperates with the drive seat (219) on the rack (213). A lifting seat (211) is installed at the guide groove (225). The lifting seat (211) is equipped with a top plate (214) through a connecting plate (212). The bottom end of the stacking mechanism (2) is equipped with a cylinder (207). The output end of the cylinder (207) is equipped with a push plate (205).

2. A stacking device for packaging box production and processing according to claim 1, characterized in that: A second support block (217) is movably installed inside the limiting frame (201) via a torsion spring, and a first support block (216) is movably installed inside the limiting frame (201) below the second support block (217); the back of the first support block (216) is provided with a locking tooth (215), and the first support block (216) engages with the rack (213) through the locking tooth (215).

3. A stacking device for packaging box production and processing according to claim 2, characterized in that: A stop bar (208) is installed inside the limit frame (201) behind the second support block (217). When the second support block (217) supports the blister box (203), the stop bar (208) blocks the second support block (217) from rotating downwards in the opposite direction.

4. A stacking device for packaging box production and processing according to claim 3, characterized in that: The inner side of the limiting frame (201) is equipped with a first limiting plate (220) and a base plate (223). A rack (213) is installed inside the limiting frame (201) through the first limiting plate (220) and the base plate (223). A second limiting plate (221) is provided on the back of the rack (213). A guide shaft is provided between the first limiting plate (220) and the base plate (223). The second limiting plate (221) is installed between the first limiting plate (220) and the base plate (223) through the guide shaft. A spring (222) is provided on the guide shaft between the second limiting plate (221) and the base plate (223). The rack (213) is driven to reset by the spring (222).

5. A stacking device for packaging box production and processing according to claim 4, characterized in that: The rack (213) is U-shaped, and the bottom end of the rack (213) is hinged to one end of the support plate (224). The support plate (224) is inclined and the other end of the support plate (224) is hinged to the clamping plate (301). The conveyor belt (3) includes multiple parallel conveyor rollers, and the multiple conveyor rollers pass through the clamping plate (301). The clamping plate (301) can move along the axial direction of the conveyor rollers. When the rack (213) is raised and lowered, the support plate (224) swings around the hinge point between it and the rack (213) and pushes and pulls the clamping plate (301) to move laterally along the axial direction of the conveyor rollers, thereby making the blister box (203) placed on the conveyor belt (3) centered.

6. A stacking device for packaging box production and processing according to claim 5, characterized in that: The upper part of the rack (213) is provided with a fixed beam (218). A drive seat (219) is mounted on the fixed beam (218) via a ratchet that rotates in one direction. The limit frame (201) is rotatably mounted with a lifting mechanism (204) via the mounting seat (209). The lifting mechanism (204) includes a rotating shaft (210), which is mounted on the mounting seat (209) via a ratchet that rotates in one direction. The rotating shaft (210) is provided with a guide groove (225) and a drive groove (226). The guide groove (225) includes a spiral rising section, a circumferential holding section, and a vertical groove. The spiral rising section is a single thread groove structure that extends circumferentially along the rotating shaft (210) and rises axially. The end of the spiral rising section is at the highest position; the circumferential holding section extends circumferentially along the rotating shaft (210) and the axial height remains unchanged. The beginning of the circumferential holding section is connected to the end of the spiral rising section; the end of the circumferential holding section is connected to the beginning of the spiral rising section through a vertical groove. The drive groove (226) meshes with the drive seat (219). A lifting seat (211) is installed at the guide groove (225). A connecting plate (212) is installed on one side of the lifting seat (211). A top plate (214) is installed at the end of the connecting plate (212) through a torsion spring. The side of the lifting seat (211) away from the connecting plate (212) contacts the limit frame (201) to prevent the lifting seat (211) from rotating.

7. A stacking device for packaging box production and processing according to claim 6, characterized in that: A cylinder (207) is installed at the bottom of the stacking mechanism (2). A push plate (205) is installed at the output end of the cylinder (207). A limit post (206) is provided on the push plate (205). The push plate (205) limits the position of the blister box (203) through the limit post (206). The blister box (203) is transported to the push plate (205) by the conveyor belt (3).

8. A stacking device for packaging box production and processing according to claim 7, characterized in that: The limiting frame (201) has limiting rods (202) located at the four corners of the blister box (203). The limiting rods (202) limit the blister box (203) to prevent the stacked blister boxes (203) from tilting.

9. A stacking device for packaging box production and processing according to claim 8, characterized in that: After the blister pack (203) is conveyed onto the push plate (205), the cylinder (207) pushes the blister pack (203) upward through the push plate (205). The blister pack (203) pushes the first support block (216) to deflect. At the same time, when the first support block (216) deflects, it engages with the rack (213) and drives the rack (213) to descend. When the rack (213) descends, it pushes and pulls the clamping plate (301) along the conveyor roller axis through the inclined support plate (224), pushing the blister pack (203) on the conveyor belt (3) toward the center line of the conveyor belt (3) to ensure that the blister pack is properly shaped. The plastic box (203) is conveyed to the push plate (205); when the blister box (203) is pushed above the first support block (216), the cylinder (207) is reset, the blister box (203) presses down on the first support block (216) and is supported by the first support block (216) until the blister box (203) is lifted onto the second support block (217), the first support block (216) deflects and drives the rack (213) to rise and reset, and the lifting distance of the rack (213) is limited by the first limit plate (220), the second limit plate (221) and the bottom plate (223).

10. A stacking device for packaging box production and processing according to claim 9, characterized in that: As the rack (213) rises, it engages with the drive groove (226) of the rotating shaft (210) via a locking block in the drive seat (219) to drive the rotating shaft (210) to deflect. When the rotating shaft (210) rotates, it pushes the lifting seat (211) to rise through the threaded groove of the guide groove (225). The lifting seat (211) lifts the blister box (203) placed on the second support block (217) through the top plate (214) connected by the connecting plate (212), so that the second support block (217) is above the top plate (214). A gap is created between the blister box (203) and the blister box below it, which facilitates the insertion of the material picker. When the lifting seat (211) reaches the highest position of the spiral rising section, the lifting seat (211) first enters the circumferential holding section when the rotating shaft (210) continues to rotate, and the top plate (214) is held in the raised position to keep the material picker gap for a set time. When the rotating shaft (210) rotates through the set holding angle, the lifting seat (211) descends and resets through the vertical groove of the guide groove (225).

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