Stacking device for foam packaging boxes

Abstract

The present application belongs to the technical field of foam packaging box stacking, and specifically discloses a foam packaging box stacking device, which comprises a base, a stacking mechanism arranged above the base, four connecting frames installed on the upper side of the base, a supporting mechanism arranged between the four connecting frames, the supporting mechanism being used for supporting and placing the foam packaging box, a top frame arranged on the upper end of the four connecting frames, and a centering mechanism arranged on the lower side of the top frame, wherein the foam box is turned over, cleaned and stacked layer by layer through the cooperative work of the turnover cleaning mechanism and the supporting and fixing mechanism; the foam packaging box is turned over by the turnover mechanism to have the opening facing downward and is shaken, the inner cavity is cleaned by the ion wind knife and the negative pressure dust cover; the foam packaging box is sequentially sent to each layer of the fixing mechanism by the supporting mechanism for clamping and fixing, the bottom is supported and released after the stacking is completed, and the layer-by-layer stacking is completed; and the connecting air cylinder and the centering mechanism are adapted to different specifications of the foam packaging box.

Description

Technical Field

[0001] This invention belongs to the field of foam packaging box stacking technology, and specifically discloses a foam packaging box stacking device. Background Technology

[0002] Foam boxes, due to their excellent cushioning, shock absorption, heat insulation, and lightweight properties, are widely used in the packaging and transportation of food, fresh food cold chain, electronic products, and pharmaceuticals. In the production and warehousing logistics of foam boxes, multiple foam boxes need to be stacked to improve space utilization and facilitate subsequent transfer. Currently, there are two main types of stacking operations: one is for pre-formed empty boxes, using a nesting stacking method where multiple empty boxes are stacked together, with the upper box completely nested into the internal cavity of the lower box, utilizing the demolding taper of the box side walls to achieve tight stacking and save storage space; the other is for stacking complete foam boxes containing products or already sealed, using robotic arms or manually to stack the boxes layer by layer onto pallets. Regardless of the stacking method, it is required that the upper and lower boxes be vertically aligned to ensure that the weight is evenly distributed along the box side walls, while strictly controlling the stacking height to prevent the bottom box from being deformed under pressure.

[0003] Existing foam box stacking devices and methods still have many shortcomings in use. During the molding, cutting, and conveying process of foam packaging boxes, small EPS foam particles or debris often remain on the inner walls of the box cavities. These particles, due to their light weight and tendency to generate static electricity, adhere firmly to the inner walls of the boxes and are difficult to remove naturally. When multiple empty boxes are stacked, the residual particles are trapped in the gaps between the boxes, making them impossible to remove effectively before packing. Furthermore, during subsequent warehousing and transportation, vibration and friction generate more dust, affecting product cleanliness and potentially exacerbating friction between boxes during transport, leading to new static electricity and particle contamination. In addition, existing stacking devices only focus on the clamping and stacking of boxes and do not include a function to clean residual particles inside the box cavities. Because the surface of foam is smooth and has strong electrostatic adsorption, simple blowing is insufficient to completely remove the attached particles, while vacuuming is limited by the upward orientation of the box openings, causing particles to accumulate at the bottom of the box under gravity and making them difficult to effectively remove. Summary of the Invention

[0004] To address the technical problems of existing foam packaging box stacking devices being unable to effectively clean residual foam particles from the inner wall of the foam packaging box cavity before stacking, and the foam packaging boxes being prone to shifting and misalignment during stacking, resulting in uneven stacking, this invention provides a foam packaging box stacking device.

[0005] To achieve the above objectives, the present invention provides a stacking device for foam packaging boxes, including a base, a stacking mechanism disposed above the base, the stacking mechanism including four connecting frames, the four connecting frames being installed above the base, and a supporting mechanism disposed between the four connecting frames, the supporting mechanism being used to support and place the foam packaging boxes. The four connecting frames are provided with a top frame at the top end, and a centering mechanism is provided on both sides below the top frame. The centering mechanism is used to adjust the position of the foam packaging box above the support mechanism. The four connecting frames are provided with four connecting slide rails on one side, and multiple fixing mechanisms slide on the outer wall of the four connecting slide rails. The fixing mechanisms are used to perform positioning processing after the foam packaging box is adjusted to the appropriate position. One of the two connecting frames is provided with a conveying mechanism, which includes two side plates. A cleaning mechanism is provided below the conveying mechanism. A flipping mechanism is symmetrically provided above the two side plates. The two flipping mechanisms are used to clamp and flip the foam packaging box on the conveying mechanism. The cleaning mechanism includes a negative pressure dust collection hood, which is installed between two side panels. A negative pressure pipe is provided below the negative pressure dust collection hood, and an ion air knife is provided between the two side panels. The ion air knife and the negative pressure dust collection hood are used to blow and vacuum the inner cavity of the foam packaging box after it is turned over. The foam packaging box is flipped over so that the opening faces down. In conjunction with the ion air knife and negative pressure dust suction hood, the inner cavity of the foam packaging box is blown and vacuumed. This effectively removes residual foam particles from the inner wall of the foam packaging box, preventing particles from being trapped in the gaps of the foam packaging box after stacking, which helps to improve the cleanliness of the product.

[0006] Preferably, the lifting mechanism includes four lifting slide rails, which are respectively installed on one side of four connecting frames. Lifting blocks are slidably arranged on each of the four lifting slide rails. A housing is provided on one side of two of the lifting blocks and on one side of the other two lifting blocks, and a support roller is provided between the two housings.

[0007] Preferably, the centering mechanism includes mounting blocks, two of which are mounted on both sides below the top frame. An adjustment slide rail is provided at the lower center of the mounting block, and an adjustment block is slidably mounted on the adjustment slide rail. A connecting box is provided on one side of the adjustment block, and two positioning cylinders are provided on one side of the connecting box. Positioning plates are provided at the output ends of the two positioning cylinders.

[0008] Preferably, each of the two connecting frames is provided with a connecting cylinder on one side, the output end of the two connecting cylinders is provided with a fixing block, and a stop bar is provided between the two fixing blocks. The stop bar is used to limit the conveying direction of the foam packaging box.

[0009] Preferably, the fixing mechanism includes four connecting blocks, which are slidably disposed on corresponding connecting slide rails. A stabilizing block is provided in the middle of one side of each of the four connecting blocks, and a connecting electric telescopic rod is provided on one side of each of the four stabilizing blocks. A clamping block is provided at the output end of each of the four connecting electric telescopic rods. The four clamping blocks are used to clamp the two sides of the foam packaging box. The height of the clamping block can be adjusted according to the stacking position of the foam packaging boxes by sliding the connecting block up and down along the connecting slide rail. The clamping block is driven synchronously by four connecting electric telescopic rods to clamp and fix the foam packaging boxes from both sides, which helps to prevent the foam packaging boxes from shifting during the stacking process and ensures the stability of the stack.

[0010] Preferably, a support frame is provided below the two side plates, multiple conveying rollers are rotatably arranged between the two side plates, and four connecting rollers are rotatably arranged between the two side plates corresponding to the area below the cleaning mechanism. The four connecting rollers are grouped in pairs, and the negative pressure dust collection cover is installed below the multiple conveying rollers and the four connecting rollers.

[0011] Preferably, the flipping mechanism includes a fixed plate and a support plate. The lower end of the fixed plate is installed above the side plate, and one side of the support plate is installed on one side of the side plate. A push electric telescopic rod is provided at the lower end of the support plate. The output end of the push electric telescopic rod extends through to the top of the support plate and is connected to a movable plate. Two movable blocks are provided on one side of the movable plate. The fixed plate is provided with movable grooves corresponding to the two movable blocks. The two movable blocks are slidably disposed in the corresponding movable grooves. The moving plate is driven to rise and fall by pushing an electric telescopic rod. The moving block and the moving groove cooperate to guide and limit the lifting movement, so that the flipping plate and the foam packaging box being clamped can be smoothly raised and lowered to the avoidance position for flipping, which helps to improve the stability and positional accuracy of the flipping action.

[0012] Preferably, one end of each of the two movable blocks is provided with a stabilizing plate, which slides on one side of the fixed plate. A fixed electric telescopic rod is provided at the upper end of the movable block via a support block. The output end of the fixed electric telescopic rod extends through to one side of the fixed plate and is connected to a cylinder. A rotary motor is provided inside the cylinder. The output end of the rotary motor extends through to one side of the cylinder and is provided with a flipping plate. A stabilizing slide rod is provided on one side of the upper end of the cylinder. A stabilizing groove is provided on one side of the fixed plate corresponding to the stabilizing slide rod. One end of the stabilizing slide rod slides inside the stabilizing groove.

[0013] Compared with the prior art, the present invention has the following beneficial effects: This device is equipped with a flipping mechanism and a cleaning mechanism that work together to remove impurities from the inner cavity of the foam packaging box before stacking. The flipping mechanism clamps the foam packaging box, flips it so that the opening faces downwards, and then lowers it close to the connecting roller while keeping it suspended without contacting the roller surface. The opening of the box is directly opposite the collection area of ​​the negative pressure dust hood. First, the ion air knife is turned on to blow and sweep, while the foam packaging box is slightly shaken up and down. The vibration helps to shake off the particles attached to the inner wall. After blowing and shaking is completed, the ion air knife is turned off, and then the negative pressure dust hood is turned on to collect the debris. This avoids the upward airflow from the ion air knife and the negative pressure suction airflow from clashing with each other, reducing the suspension of debris. The shaken debris falls by gravity and is captured by the negative pressure dust hood, effectively preventing debris from scattering and flying away. After the cleaning operation is completed, the foam packaging box is lowered onto the connecting roller and conveyed to the stacking station. This can fully remove residual debris from the inner cavity of the box before stacking, prevent particles from being trapped inside the stacking gaps of the boxes, and improve the cleanliness of the finished foam packaging box.

[0014] The stacking station of this invention adopts a working logic of first bonding and then clamping. After the roller receives the foam packaging box, it is lifted upward and continues to feed so that the top surface of the current foam packaging box abuts against the bottom surface of the foam packaging box that has been clamped and positioned above. After the end faces of the boxes are bonded together, the fixing mechanism of the corresponding layer extends the clamping block for lateral clamping and limiting. The vertical load of the foam packaging box is transmitted through the contact between the end faces of the upper and lower boxes. The clamping block only serves to position the boxes laterally and prevent them from shifting or tipping over, and does not bear the vertical load of the boxes. After all the foam packaging boxes are stacked, the roller rises to support the bottom of the entire stack, and all the clamping blocks are released simultaneously. The entire stack of foam boxes that has been bonded together is supported above the roller, avoiding the phenomenon of boxes falling freely or being impacted and bumped, ensuring the neatness of the stack, and reducing the risk of foam box crushing and breakage.

[0015] By setting a stop bar in conjunction with a connecting cylinder, the connecting cylinder extends to the corresponding stroke according to the length specification of the foam packaging box, driving the stop bar to move to the blocking position that matches the length specification, so that foam packaging boxes of different lengths can be placed in the center on the roller. At the same time, the initial position of the positioning plate is adjusted according to the width of the foam packaging box of different specifications by adjusting the sliding rail and adjusting block of the centering mechanism, realizing the adaptation of foam packaging boxes of different lengths and widths, and improving the versatility of the device. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention; Figure 2 This is a schematic diagram of the installation structure of the support mechanism of the present invention; Figure 3 This is a schematic diagram of the arrangement structure of the multiple fixing mechanisms of the present invention; Figure 4 This is a schematic diagram of the mounting structure of the baffle bar of the present invention; Figure 5 This is a schematic diagram of the installation structure of the centering mechanism of the present invention; Figure 6 This is a schematic diagram of the installation structure of the housing and multiple idlers of the present invention; Figure 7 This is a schematic diagram of the installation structure of the negative pressure dust collection hood of the present invention; Figure 8 This is a schematic diagram of the installation structure of the ion air knife of the present invention; Figure 9 This is a schematic diagram of the installation structure of the two flipping mechanisms of the present invention; Figure 10 This is a schematic diagram of the mounting structure of the rotary electric motor of the present invention.

[0017] In the diagram: 1. Base; 2. Connecting frame; 3. Top frame; 4. Lifting slide rail; 5. Lifting block; 6. Housing; 7. Idler roller; 8. Mounting block; 9. Adjusting slide rail; 10. Adjusting block; 11. Connecting box; 12. Positioning cylinder; 13. Positioning plate; 14. Connecting cylinder; 15. Fixing block; 16. Stop bar; 17. Stabilizing slide rod; 18. Connecting slide rail; 19. Connecting block; 20. Stabilizing block; 21. Connecting electric telescopic rod; 22. Clamping block; 23. Side plate; 24. Support frame; 25. Conveying roller; 26. Negative pressure dust collection hood; 27. Negative pressure pipe; 28. Connecting roller; 29. ​​Ion air knife; 30. Fixing plate; 31. Support plate; 32. Pushing electric telescopic rod; 33. Moving plate; 34. Moving block; 35. Stabilizing plate; 36. Fixing electric telescopic rod; 37. Cylinder; 38. Rotary motor; 39. Tilting plate. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0019] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the invention is not limited to the specific embodiments disclosed below.

[0020] like Figures 1-10 The stacking device for foam packaging boxes shown includes a base 1, a stacking mechanism is provided above the base 1, the stacking mechanism includes four connecting frames 2, the four connecting frames 2 are installed above the base 1, and a support mechanism is provided between the four connecting frames 2. The support mechanism is used to support the foam packaging boxes. like Figures 1-5As shown: The top of the four connecting frames 2 is provided with a top frame 3, and the two sides below the top frame 3 are provided with a centering mechanism. The centering mechanism is used to adjust the position of the foam packaging box above the support mechanism. The four connecting frames 2 are provided with four connecting slide rails 18 on one side. The connecting slide rails 18 are electrically controlled slide rails, and their sliding action is precisely controlled by an external control system. The outer wall of the four connecting slide rails 18 has multiple fixing mechanisms that are used to perform positioning processing after the foam packaging box is adjusted to the appropriate position. One of the two connecting frames 2 is equipped with a conveying mechanism, which includes two side plates 23. A cleaning mechanism is provided below the conveying mechanism, and a flipping mechanism is symmetrically provided above the two side plates 23. The two flipping mechanisms are used to clamp and flip the foam packaging box on the conveying mechanism. The cleaning mechanism includes a negative pressure dust collection hood 26, which is installed between two side plates 23. A negative pressure pipe 27 is provided below the negative pressure dust collection hood 26, and an ion air knife 29 is provided between the two side plates 23. The ion air knife 29 and the negative pressure dust collection hood 26 are used to blow and vacuum the inner cavity of the foam packaging box after it is turned over. Four connecting frames 2 are vertically installed above the base 1, distributed along the four corners of the rectangle, forming a rectangular frame structure, which forms the basic skeleton of the stacking area. The top frame 3 is fixedly installed on the upper end of the four connecting frames 2, connecting the four connecting frames 2 into an integral frame, enhancing the overall stability and torsional resistance of the stacking mechanism. The connecting slide rail 18 provides a guide path for the fixed mechanism to slide up and down. The conveying mechanism is located on one side of two connecting frames 2, and its conveying surface corresponds to the inlet of the stacking mechanism. It is used to orderly convey the foam packaging boxes to be stacked from the previous station to the stacking station. The flipping mechanism is symmetrically arranged above the two side plates 23. It is used to clamp and flip the foam packaging boxes on the conveying mechanism so that the opening faces downward, so that the subsequent cleaning mechanism can effectively clean the cavity of the foam packaging box. The cleaning mechanism is located below the conveying mechanism, and its negative pressure dust suction hood 26 is installed between the two side plates 23 and located at... Below the conveying roller 25 and the connecting roller 28, one end of the negative pressure pipe 27 is connected to the bottom of the negative pressure dust collection hood 26, and the other end is connected to the external negative pressure source and dust collection device. The ion air knife 29 is fixedly installed between the two side plates 23 and above the negative pressure dust collection hood 26, located in the gap between two adjacent connecting rollers 28. The air outlet faces upward and is directly opposite the hollow area formed by the connecting rollers 28, so that the high-speed airflow blown out by the ion air knife 29 can pass through the gap between the connecting rollers 28 and enter the inner cavity of the foam packaging box. The air outlet of the ion air knife 29 faces the inner cavity of the foam packaging box on the conveying mechanism.

[0021] like Figures 3-6As shown: The lifting mechanism includes four lifting slide rails 4, which are respectively installed on one side of four connecting frames 2. Lifting blocks 5 are slidably arranged on each of the four lifting slide rails 4. Housings 6 are provided on one side of two lifting blocks 5 and on one side of the other two lifting blocks 5. A roller 7 is arranged between the two housings 6. The lifting slide rail 4 is an electrically controlled slide rail, and its sliding action is precisely controlled by an external control system. The lifting block 5 is slidably set on the lifting slide rail 4 and can move up and down along the lifting slide rail 4 under the action of the electrically controlled drive mechanism. The housing 6 rises and falls synchronously with the lifting block 5. The two housings 6 are set opposite to each other and are located on both sides of the stacking area. The idler roller 7 is connected to an external drive unit and can rotate actively under the drive unit. The idler roller 7 is used to receive foam packaging boxes fed by the conveying mechanism. After receiving the boxes, the lifting block 5 slides upward along the lifting slide rail 4, driving the idler roller 7 and the foam packaging box placed on it to rise upward and continue to feed upward, so that the top surface of the foam packaging box abuts against the bottom surface of the foam packaging box that has been clamped and positioned above. After the upper and lower box end faces are in contact with each other, the corresponding layer fixing mechanism completes the lateral clamping and limiting. After the idler roller 7 completes the lifting and pressing of the box, it descends back to the receiving position to prepare to receive the next foam packaging box. The active rotation of the idler roller 7 can assist in fine-tuning the position of the foam packaging box during centering and positioning, reducing frictional resistance.

[0022] like Figure 5 As shown: The centering mechanism includes mounting blocks 8. Two mounting blocks 8 are installed on both sides below the top frame 3. An adjusting slide rail 9 is provided at the lower middle of the mounting block 8. An adjusting block 10 is slidably mounted on the adjusting slide rail 9. A connecting box 11 is provided on one side of the adjusting block 10. Two positioning cylinders 12 are provided on one side of the connecting box 11. A positioning plate 13 is provided at the output end of the two positioning cylinders 12. The adjusting slide rail 9 is an electrically controlled slide rail that extends horizontally along the width of the stacking area. The adjusting block 10 is slidably set on the adjusting slide rail 9. The initial position of the positioning plate 13 can be adjusted according to the width of different specifications of foam packaging boxes. The positioning plate 13 is fixed to the output end of the positioning cylinder 12. The side of the positioning plate facing the foam packaging box is provided with a flexible buffer layer to prevent scratching the surface of the foam packaging box. When the foam packaging box is carried by the roller 7 and rises to a fixed height, the two positioning cylinders 12 extend synchronously and push the two positioning plates 13 from the left and right sides to move towards the middle at the same time, pushing the foam packaging box to the center position in the width direction, ensuring that the upper and lower foam packaging boxes are vertically aligned, and avoiding stacking tilting or collapse.

[0023] like Figure 6 As shown: Each of the two connecting frames 2 is equipped with a connecting cylinder 14 on one side, and a fixing block 15 is provided at the output end of the two connecting cylinders 14. A baffle 16 is provided between the two fixing blocks 15. The baffle 16 is used to limit the conveying direction of the foam packaging box. The horizontal position of the baffle 16 can be adjusted by controlling the extension of the connecting cylinder 14, thereby adjusting the horizontal distance between the baffle 16 and the roller 7 to accommodate foam packaging boxes of different lengths, ensuring that the foam packaging box is centered along the length of the roller 7. The side of the baffle 16 facing the foam packaging box has a cushioning layer to absorb the impact force generated upon contact and protect the edges of the foam packaging box from damage.

[0024] like Figure 4 As shown: The fixing mechanism includes four connecting blocks 19, which are slidably mounted on the corresponding connecting slide rails 18. A stabilizing block 20 is provided in the middle of one side of each of the four connecting blocks 19, and a connecting electric telescopic rod 21 is provided on one side of each of the four stabilizing blocks 20. A clamping block 22 is provided at the output end of each of the four connecting electric telescopic rods 21. The four clamping blocks 22 are used to clamp the two sides of the foam packaging box. Four connecting blocks 19 are slidably mounted on corresponding connecting slide rails 18. They can slide up and down along the connecting slide rails 18 under electric control to adjust the installation position of each clamping component according to the height of the foam packaging box. The stabilizing block 20 is fixed to the middle of the side of the connecting block 19. The cylinder of the connecting electric telescopic rod 21 is fixed to the stabilizing block 20, and the output end extends horizontally. The clamping block 22 is fixed to the end of the output end of the connecting electric telescopic rod 21, and its clamping surface is provided with an elastic pad. Each clamping component moves sequentially from the highest position to the lowest position in the stacking area. Each foam packaging box corresponds to a set of clamping components. The roller 7 feeds the foam packaging boxes layer by layer to the height of each clamping component, where they are clamped and fixed by the clamping components at the corresponding height. After all the foam packaging boxes are stacked, the connecting electric telescopic rods 21 of each clamping component retract synchronously, and the clamping blocks 22 are released simultaneously, completing the stacking of the entire stack.

[0025] like Figures 7-8 As shown: A support frame 24 is provided below the two side plates 23, and multiple conveying rollers 25 are rotatably arranged between the two side plates 23. Four connecting rollers 28 are rotatably arranged between the two side plates 23 at the location below the cleaning mechanism. The four connecting rollers 28 are grouped in pairs, and a negative pressure dust collection hood 26 is installed below the multiple conveying rollers 25 and the four connecting rollers 28. Both the conveying roller 25 and the connecting roller 28 are active rollers, which are connected to the external drive components. The conveying roller 25 is used to drive the foam packaging box forward. The four connecting rollers 28 are arranged at intervals to form a hollow area, which is directly opposite the suction port of the negative pressure dust hood 26 below.

[0026] like Figures 9-10As shown: The flipping mechanism includes a fixed plate 30 and a support plate 31. The lower end of the fixed plate 30 is installed above the side plate 23, and one side of the support plate 31 is installed on one side of the side plate 23. A push electric telescopic rod 32 is provided at the lower end of the support plate 31. The output end of the push electric telescopic rod 32 extends through to the top of the support plate 31 and is connected to a movable plate 33. Two movable blocks 34 are provided on one side of the movable plate 33. The fixed plate 30 is provided with a movable groove corresponding to the two movable blocks 34. The two movable blocks 34 are slidably disposed in the corresponding movable grooves. The fixed plate 30 serves as the mounting base for the flipping mechanism. The output end of the push electric telescopic rod 32 extends vertically upward through the support plate 31 and is fixedly connected to the movable plate 33. The push electric telescopic rod 32 realizes the overall lifting and lowering movement of the flipping plate 39 and the clamped foam packaging box. When the push electric telescopic rod 32 extends, it pushes the movable plate 33 to rise, and when it retracts, it pulls the movable plate 33 to fall. Two movable blocks 34 are fixedly installed on the side of the movable plate 33 near the fixed plate 30. The two movable blocks 34 guide and limit the lifting and lowering movement of the movable plate 33 to prevent the movable plate 33 from swaying horizontally during the lifting and lowering process.

[0027] like Figures 9-10 As shown: Two movable blocks 34 are provided with a stabilizing plate 35 at one end. The stabilizing plate 35 slides on one side of the fixed plate 30. The upper end of the movable plate 33 is provided with a fixed electric telescopic rod 36 through a support block. The output end of the fixed electric telescopic rod 36 extends through to one side of the fixed plate 30 and is connected to a cylinder 37. A rotary motor 38 is provided inside the cylinder 37. The output end of the rotary motor 38 extends through to one side of the cylinder 37 and is provided with a flipping plate 39. A stabilizing slide rod 17 is provided on one side of the upper end of the cylinder 37. A stabilizing groove is provided on one side of the fixed plate 30 corresponding to the stabilizing slide rod 17. One end of the stabilizing slide rod 17 slides inside the stabilizing groove. The stabilizing plate 35 is a vertically arranged metal plate. The stabilizing plate 35 provides auxiliary guidance for the lifting and lowering movement of the cylinder 37. The fixed electric telescopic rod 36 controls the distance between the flipping plate 39 and the side wall of the foam packaging box and the magnitude of the clamping force. The cylinder 37 protects the rotary motor 38. The rotary motor 38 realizes the 180° flipping action of the foam packaging box. When the fixed electric telescopic rod 36 extends, it pushes the flipping plate 39 closer to the side wall of the foam packaging box and clamps it. When the rotary motor 38 starts, it drives the flipping plate 39 to rotate 180°, flipping the foam packaging box so that the opening faces downward. One end of the stabilizing slide rod 17 is slidably set inside the stabilizing groove to guide and limit the horizontal movement of the cylinder 37, ensuring that the cylinder 37 and the flipping plate 39 can maintain a precise movement trajectory when they are in horizontal reciprocating motion driven by the fixed electric telescopic rod 36 and when they are in lifting and lowering motion driven by the pushing electric telescopic rod 32. The flipping mechanism flips the foam packaging box so that the opening faces down, then lowers it close to the connecting roller 28 and keeps it suspended without contacting the roller surface. The opening of the box is directly facing the collection area of ​​the negative pressure dust collection hood 26. First, the ion air knife 29 is turned on to complete the blowing and slight shaking. After the ion air knife 29 is turned off, the negative pressure dust collection hood 26 is turned on to collect the debris. After cleaning, the foam packaging box is placed above the connecting roller 28. When stacking, the lifting mechanism raises the box to fit against the end face of the upper box before lateral clamping and limiting.

[0028] It should be noted that the specific circuit connections and control methods of the drive motor, lifting slide rail 4, adjusting slide rail 9, connecting slide rail 18, pushing electric telescopic rod 32, fixing electric telescopic rod 36, rotating motor 38, connecting electric telescopic rod 21 and other actuators and control elements involved in the embodiments of the present invention are all conventional technical means in the field and belong to the scope of prior art. Those skilled in the art can select appropriate models and perform conventional circuit design according to actual needs, and their specific working principles will not be elaborated here. The lifting slide rail 4, adjusting slide rail 9, and connecting slide rail 18 involved in this invention can be any one of a servo motor driven linear module or a linear motor driven slide rail. The pushing electric telescopic rod 32, fixing electric telescopic rod 36, and connecting electric telescopic rod 21 can be any one of a servo electric cylinder or a stepper motor driven screw telescopic mechanism. The rotary motor 38 can be any one of a stepper motor or a servo motor. Each actuator is electrically connected to an external power supply and controller via wires. The control signal output terminal of the controller is connected to the control terminal of each actuator to achieve precise control of the action sequence, stroke, and speed of each actuator. The specific circuit connections and control logic mentioned above are all known technologies in the art and will not be described in detail here.

[0029] Working principle: According to the length specification of the foam packaging box to be stacked, the connecting cylinder 14 extends to the corresponding stroke, driving the baffle 16 to move to the blocking position that matches the length specification, so that the horizontal distance between the baffle 16 and the roller 7 matches the length of the foam packaging box.

[0030] When the foam packaging box reaches the position of the flipping mechanism along the conveying direction, the fixed electric telescopic rod 36 extends and pushes the flipping plate 39 to clamp the side wall of the foam packaging box, fixing the foam packaging box between the two flipping plates 39. Then, the electric telescopic rod 32 is pushed to extend and push the moving plate 33 and the cylinder 37 to rise as a whole, driving the flipping plate 39 and the clamped foam packaging box to rise synchronously to the clearance position, so that the foam packaging box is disengaged from the conveying roller 25, leaving space for flipping. Then, the rotary motor 38 starts, driving the flipping plate 39 to rotate 180°, flipping the foam packaging box so that the opening faces downwards; the push electric telescopic rod 32 retracts, causing the flipping plate 39 and the foam packaging box to descend close to the connecting roller 28, while the foam packaging box remains suspended and does not contact the connecting roller 28. The opening of the foam packaging box is always directly facing the collection area of ​​the negative pressure dust hood 26, and the flipping plate 39 continues to maintain lateral clamping and limiting of the foam packaging box; first, the ion air knife 29 is activated, which blows through the inner cavity of the foam packaging box to neutralize static electricity and remove foam debris adhering to the inner wall; the push electric telescopic rod 32 performs several small-amplitude reciprocating extensions and retractions, with the reciprocating extension and retraction stroke of the push electric telescopic rod 32 being less than that of the foam packaging box. The gap between the bottom surface of the box and the roller surface of the connecting roller 28 ensures that the foam packaging box will not collide with the connecting roller 28 during the shaking process, causing the foam packaging box to shake slightly up and down, assisting in the shedding of debris from the inner wall; after the blowing and shaking operations are completed, the ion air knife 29 is turned off, and the negative pressure dust collection hood 26 is turned on after a delay. The peeled debris falls downwards by gravity, is captured by the negative pressure dust collection hood 26, and is transported to the external dust collection device through the negative pressure pipe 27; after the dust collection operation is completed, the negative pressure source is turned off; the push electric telescopic rod 32 continues to retract, driving the flip plate 39 and the foam packaging box to descend, placing the foam packaging box on the connecting roller 28, the flip plate 39 is released, and the foam packaging box continues to be moved forward by the conveying mechanism to the stacking station.

[0031] When the foam packaging box arrives at the stacking station, the idler roller 7 descends to be flush with the conveying surface of the conveying mechanism. The flipping plate 39 of the flipping mechanism is released, and the foam packaging box transitions to the top of the idler roller 7 under the drive of the conveying roller 25. Its front end abuts against the side of the baffle 16, and its rear end is within the bearing range of the idler roller 7, so that the foam packaging box is placed in the center along the length of the idler roller 7, completing the receiving and positioning of the foam packaging box in the conveying direction. Then, the lifting block 5 slides upward along the lifting slide rail 4, driving the idler roller 7 and the foam packaging box placed on it to rise to the highest position of the stacking area. The idler roller 7 continues to feed upward, so that the top surface of the foam packaging box reaches the upper limit position of the stacking. The four connecting electric telescopic rods 21 of the fixed mechanism extend synchronously, driving the clamping blocks 22 on the left and right sides to move towards the middle from the left and right directions of the foam packaging box at the same time, implementing lateral clamping and limiting of the foam packaging box.

[0032] After the first foam box is positioned and clamped, the lifting block 5 drives the roller 7 to descend to be flush with the conveying surface of the conveying mechanism, ready to receive the second foam box. The second foam box is also first cleaned at the flipping and cleaning station, and then transferred to the stacking station to be received by the roller 7. After receiving, the lifting block 5 drives the roller 7 and the second foam box to rise until the top surface of the second foam box abuts against the bottom surface of the foam box that has been clamped and fixed on the upper layer. The ends of the upper and lower foam boxes are in contact with each other. Then, the clamping block 22 of the fixing mechanism corresponding to the second layer extends to clamp and limit the second foam box laterally. At this time, the vertical load of the foam box is transmitted by the ends of the foam boxes that are in contact with each other. The clamping block 22 only plays the role of lateral positioning and preventing displacement and tipping, and does not bear the vertical weight of the foam box.

[0033] Similarly, each foam packaging box is first cleaned at the flipping and cleaning station, then lifted by the lifting mechanism so that the top surface of the foam packaging box is against the bottom surface of the upper foam packaging box, and then the corresponding layer fixing mechanism clamps it laterally. When the last foam packaging box is clamped and fixed to the bottom fixing mechanism, the lifting block 5 drives the roller 7 to rise again, so that the bearing surface of the roller 7 is in contact with and supports the bottom of the bottom foam packaging box. Then, the electric telescopic rods 21 connecting each group of fixing mechanisms retract synchronously, and all clamping blocks 22 are released at the same time. The multi-layer foam packaging boxes with their end faces in contact are supported above the roller 7. At this time, the stacking is completed. The entire stack of foam packaging boxes is removed from the stacking area by the external pushing mechanism or robot, completing the entire stacking operation.

[0034] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A stacking device for foam packaging boxes, comprising a base (1), characterized in that, A stacking mechanism is provided above the base (1). The stacking mechanism includes four connecting frames (2). The four connecting frames (2) are installed above the base (1). A support mechanism is provided between the four connecting frames (2). The support mechanism is used to support the foam packaging box. The four connecting frames (2) are provided with a top frame (3) at the top end. The top frame (3) is provided with a centering mechanism on both sides below. The centering mechanism is used to adjust the position of the foam packaging box above the support mechanism. The four connecting frames (2) are provided with four connecting slide rails (18) on one side. The four connecting slide rails (18) have multiple fixing mechanisms sliding on their outer walls. The fixing mechanisms are used to perform positioning processing after the foam packaging box is adjusted to a suitable position. One of the two connecting frames (2) is provided with a conveying mechanism on one side. The conveying mechanism includes two side plates (23). A cleaning mechanism is provided below the conveying mechanism. A flipping mechanism is symmetrically provided above the two side plates (23). The two flipping mechanisms are used to clamp and flip the foam packaging box on the conveying mechanism. The cleaning mechanism includes a negative pressure dust collection hood (26), which is installed between two side plates (23). A negative pressure pipe (27) is provided below the negative pressure dust collection hood (26), and an ion air knife (29) is provided between the two side plates (23). The ion air knife (29) and the negative pressure dust collection hood (26) are used to blow and vacuum the inner cavity of the foam packaging box after it is turned over.

2. The stacking device for foam packaging boxes according to claim 1, characterized in that, The lifting mechanism includes four lifting slide rails (4), which are respectively installed on one side of four connecting frames (2). Lifting blocks (5) are slidably arranged on each of the four lifting slide rails (4). Housings (6) are provided on one side of two of the lifting blocks (5) and on one side of the other two lifting blocks (5). A roller (7) is provided between the two housings (6).

3. The stacking device for foam packaging boxes according to claim 1, characterized in that, The centering mechanism includes mounting blocks (8), two mounting blocks (8) are mounted on both sides below the top frame (3), an adjustment slide rail (9) is provided at the lower middle part of the mounting block (8), an adjustment block (10) is slidably provided on the adjustment slide rail (9), a connecting box (11) is provided on one side of the adjustment block (10), two positioning cylinders (12) are provided on one side of the connecting box (11), and a positioning plate (13) is provided at the output end of the two positioning cylinders (12).

4. The stacking device for foam packaging boxes according to claim 1, characterized in that, One of the two connecting frames (2) is provided with a connecting cylinder (14) on one side, and a fixing block (15) is provided at the output end of the two connecting cylinders (14). A baffle (16) is provided between the two fixing blocks (15), and the baffle (16) is used to limit the conveying direction of the foam packaging box.

5. A stacking device for foam packaging boxes according to claim 1, characterized in that, The fixing mechanism includes four connecting blocks (19), which are slidably mounted on corresponding connecting slide rails (18). A stabilizing block (20) is provided in the middle of one side of each of the four connecting blocks (19), and a connecting electric telescopic rod (21) is provided on one side of each of the four stabilizing blocks (20). A clamping block (22) is provided at the output end of each of the four connecting electric telescopic rods (21). The clamping blocks (22) are used to clamp the two sides of the foam packaging box.

6. A stacking device for foam packaging boxes according to claim 1, characterized in that, A support frame (24) is provided below the two side plates (23), and multiple conveying rollers (25) are rotatably arranged between the two side plates (23). Four connecting rollers (28) are rotatably arranged between the two side plates (23) corresponding to the bottom of the cleaning mechanism. The four connecting rollers (28) are grouped in pairs. The negative pressure dust suction hood (26) is installed below the multiple conveying rollers (25) and the four connecting rollers (28).

7. A stacking device for foam packaging boxes according to claim 1, characterized in that, The flipping mechanism includes a fixed plate (30) and a support plate (31). The lower end of the fixed plate (30) is installed above the side plate (23), and one side of the support plate (31) is installed on one side of the side plate (23). The lower end of the support plate (31) is provided with a push electric telescopic rod (32). The output end of the push electric telescopic rod (32) extends through to the top of the support plate (31) and is connected to a moving plate (33). Two moving blocks (34) are provided on one side of the moving plate (33). The fixed plate (30) is provided with moving grooves corresponding to the two moving blocks (34). The two moving blocks (34) are slidably disposed in the corresponding moving grooves.

8. A stacking device for foam packaging boxes according to claim 7, characterized in that, Two movable blocks (34) are provided with a stabilizing plate (35) at one end. The stabilizing plate (35) slides on one side of the fixed plate (30). The upper end of the movable plate (33) is provided with a fixed electric telescopic rod (36) through a support block. The output end of the fixed electric telescopic rod (36) extends through to one side of the fixed plate (30) and is connected to a cylinder (37). A rotary motor (38) is provided inside the cylinder (37). The output end of the rotary motor (38) extends through to one side of the cylinder (37) and is provided with a flipping plate (39). A stabilizing slide rod (17) is provided on one side of the upper end of the cylinder (37). A stabilizing groove is provided on one side of the fixed plate (30) corresponding to the stabilizing slide rod (17). One end of the stabilizing slide rod (17) slides inside the stabilizing groove.

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