A warehouse-in and warehouse-out conveying device for EPP packaging boxes

Abstract

The application belongs to the technical field of stereoscopic warehouse, and specifically discloses an in-out warehouse conveying device for EPP packaging boxes, which comprises a goods shelf, a lane track, a vertical elevator and a screw rod reciprocating mechanism, the outer surface of the goods shelf is provided with a plurality of support rods on which the packaging boxes are placed, the lane track is arranged on the ground on one side of the goods shelf, a mounting sliding table is slidably connected to the outside of the lane track, the vertical elevator is arranged above the mounting sliding table, the vertical elevator is connected to two parallel support frames through a lifting table, conveyors are arranged above the two groups of support frames, and the screw rod reciprocating mechanism is arranged on one side of the conveyor. The in-out warehouse conveying device is characterized in that the multi-degree-of-freedom displacement cooperation and the whole-column parallel taking and feeding mechanism can greatly reduce the single out-of-warehouse circulation frequency and significantly improve the logistics efficiency of batch in-out warehouse. Meanwhile, the integrated automatic code scanning function simplifies the information tracing process and effectively improves the informatization and automation level of the warehouse operation.

Description

Technical Field

[0001] This invention belongs to the field of automated warehouse technology, and specifically discloses an inbound and outbound conveying device for EPP packaging boxes. Background Technology

[0002] With the rapid development of the precision instrument manufacturing industry, the assembly and transportation processes place extremely high demands on packaging protection. EPP (expanded polypropylene) material, due to its excellent impact resistance, heat resistance, and recyclability, is widely used in the production of large-format precision instrument packaging boxes. In actual production management, to achieve accurate traceability and assembly of instruments from different batches and models, warehouse management systems typically install barcode labels on the front of the EPP packaging boxes. By scanning these labels, the batch information of the instrument and the packaging box can be accurately matched, thereby ensuring accuracy in the assembly process.

[0003] In current automated warehouse applications, the inbound and outbound operations of large-format EPP packaging boxes generally employ a lane-type stacker crane combined with end-load forks. However, this technical solution has the following significant drawbacks: First, outbound efficiency is limited and cannot meet the needs of batch processing. Existing automated warehouse outbound equipment, with its conveyor mechanisms (such as single-deep or double-deep forks), is structurally limited, typically handling only one or two pallets or packaging box units per storage and retrieval cycle. For production cycles requiring the simultaneous outbound of multiple large-format packaging boxes from the same batch for centralized assembly, this "one-by-one or in pairs" retrieval method results in frequent outbound operations, long conveyor line waiting times, and severely restricts overall logistics efficiency.

[0004] Secondly, the fixed single-point outbound layout means that packaging boxes can only be output sequentially in series, and it is inherently not capable of receiving entire rows in parallel. If batch outbound is forced, complex diversion, temporary storage and sorting equipment must be added at the back end of the outbound port, which not only occupies additional ground space, but also significantly increases the difficulty of system control and equipment investment costs. In addition, the reading of barcode labels during the outbound process needs to be frequently started and stopped with each output packaging box, and the discrete arrangement after output is not conducive to subsequent parallel barcode verification and centralized diversion, often requiring secondary reorganization or manual intervention, which further weakens the overall operation efficiency.

[0005] In summary, designing a highly efficient, same-row batch outbound conveying device that ensures accurate barcode scanning and traceability of large-sized EPP packaging boxes has become a pressing technical challenge in this field. The purpose of this invention is to provide a novel inbound conveying device to overcome the shortcomings of the existing technology. Summary of the Invention

[0006] The purpose of this invention is to solve the problems existing in the background art, and to propose an inbound and outbound conveying device for EPP packaging boxes, including a shelf, an aisle track, a vertical lift, and a screw reciprocating mechanism. Multiple support rods for placing packaging boxes are distributed on the outer surface of the shelf. The aisle track is set on the ground on one side of the shelf, and a mounting slide is slidably connected to the outside of the aisle track. The vertical lift is located above the mounting slide, and the vertical lift is connected to two parallel support frames through the lifting platform. A conveyor is mounted above the two sets of support frames. The screw reciprocating mechanism is located on one side of the conveyor, and a lifting support assembly is connected to the screw reciprocating mechanism through the reciprocating slide. A bottom frame is provided above the lifting support assembly, and pushing and aligning components are provided on both sides of the bottom frame. A picking and delivering component is provided on the side of the bottom frame facing the shelf.

[0007] In the above scheme, the lifting support assembly further includes a first multi-section hydraulic cylinder, the telescopic end of the first multi-section hydraulic cylinder is fixedly provided with a support pad, and the bottom frame is arranged above the support pad.

[0008] In the above scheme, the push code assembly further includes a U-shaped frame with the U-shaped opening facing upwards. Both ends of the U-shaped frame are vertically slidably fitted with sliders. The sides of the two sliders that are close to each other are connected by a fixed plate. A lifting hydraulic cylinder is fixedly installed on the inner surface of the bottom frame. The telescopic end of the lifting hydraulic cylinder is connected to the bottom of the fixed plate. A telescopic cylinder is fixedly installed above the fixed plate and in the middle. A locking block is fixedly connected to the telescopic end of the telescopic cylinder. A U-shaped connecting rod is installed through the middle of the inside of the locking block.

[0009] In the above scheme, further, both ends of the U-shaped connecting rod are provided with locking rods, one end of each locking rod slides through the interior of the corresponding slider, and the end of each locking rod away from the U-shaped connecting rod is embedded with a damping ball, and the outer surface of the damping ball is provided with a flexible layer.

[0010] In the above solution, the picking and delivering component further includes a mounting frame, which is fixedly installed on the bottom frame and close to the shelf. A second multi-section hydraulic cylinder is fixedly installed on the outside of the mounting frame, and a picking and placing platform is fixedly installed on the telescopic end of the second multi-section hydraulic cylinder. A pushing component is installed inside the mounting frame.

[0011] In the above scheme, the pushing component further includes a bidirectional telescopic cylinder, which is fixedly installed inside the mounting frame. Both ends of the bidirectional telescopic cylinder are fixedly installed with mounting seats. Rotary shafts are rotatably inserted inside the two mounting seats. A clamping sleeve is fixedly fitted on the outside of the rotating shaft. Extrusion flexible sheets are installed at equal intervals along the circumferential direction on the outside of the clamping sleeve. A servo motor is fixedly installed at the bottom of the mounting seat. The output end of the servo motor is connected to the lower end of the rotating shaft.

[0012] In the above scheme, a barcode scanner is fixedly installed above the support pad. A multi-stage telescopic sleeve rod is symmetrically installed above the bottom frame on the side closest to the barcode scanner. An installation rod is correspondingly provided above the two multi-stage telescopic sleeve rods. A push cylinder is fixedly installed inside the two installation rods. A connecting block is fixedly installed at the telescopic end of the push cylinder. A common shaft is connected between the two connecting blocks. A pressure roller is rotatably sleeved on the outside of the shaft. A pressure sensor is provided at one end of the shaft.

[0013] In the above scheme, a U-shaped rod is inserted through the middle of the two sets of mounting rods, and the two ends of the U-shaped rod are respectively connected to the outer wall of two sets of sliders on the same side.

[0014] Compared with the prior art, the present invention has the following beneficial effects: This invention uses a lifting hydraulic cylinder in the push-and-align component to drive a U-shaped frame upward, causing a slider to slide along both sides of the U-shaped frame to a predetermined height. Then, a telescopic cylinder drives the U-shaped connecting rod and the locking rods at both ends to extend synchronously. Damping balls at the ends of the locking rods laterally push and align multiple EPP packaging boxes arranged on the bottom frame, ensuring that each packaging box is neatly arranged and aligned with the others. The flexible layer on the outer surface of the damping balls effectively guides the packaging boxes into position while preventing scratches on the packaging box surface, ensuring the consistency of the packaging box position before batch pushing, thereby improving the stability and reliability of the pick-and-place component in pushing an entire row of packaging boxes at once.

[0015] This invention utilizes a vertical lift to achieve overall lifting of the conveyor and the screw reciprocating mechanism, adapting to storage layers of different shelf heights. The screw reciprocating mechanism drives the base frame to move horizontally along the aisle direction to align with the conveyor's discharge end and the corresponding storage location on the shelf. An independent lifting support assembly enables fine-tuning of the base frame's lifting to compensate for alignment errors in the height direction. Furthermore, the screw reciprocating mechanism drives the lifting support assembly to reciprocate above the conveyor, allowing the base frame to sequentially receive multiple packaging boxes from the conveyor and arrange them into a neat row. Once the entire row of packaging boxes is stacked, multiple boxes in the same row can be simultaneously shipped out. Compared to the traditional stacker crane's operation mode, which can only store and retrieve one or two boxes at a time, this significantly reduces the number of outbound cycles, shortens the waiting time of the conveyor line, and significantly improves the overall logistics efficiency of batch outbound operations. After a vertical column of stacked boxes is aligned and the bottom frame moves out from the top to the next row or column, the barcode scanner can scan the barcode on the front of each box one by one during the upward movement. This greatly reduces the complex steps required for subsequent staff intervention or the introduction of other equipment, and effectively improves the information efficiency of inbound and outbound operations. Attached Figure Description

[0016] Figure 1A schematic diagram of the overall structure of an inbound and outbound conveying device for EPP packaging boxes provided by the present invention; Figure 2 This is a schematic diagram of the overall structure of an inbound and outbound conveying device for EPP packaging boxes provided by the present invention from another angle. Figure 3 A schematic diagram of the partial connection structure between the lifting support assembly and the bottom frame of an inbound / outbound conveying device for EPP packaging boxes provided by the present invention. Figure 4 A schematic diagram of the connection structure between the bottom frame and the U-shaped frame of an inbound / outbound conveying device for EPP packaging boxes provided by the present invention; Figure 5 A schematic diagram of the connection structure between the mounting frame, mounting base, rotating shaft, and extruded flexible sheet of an inbound and outbound conveying device for EPP packaging boxes provided by the present invention; Figure 6 This invention provides an exploded view of the connection between the U-shaped frame, the bottom frame, and the support pad of an inbound / outbound conveying device for EPP packaging boxes. Figure 7 A schematic diagram of the connection structure between the pressure roller, the pushing cylinder, and the mounting rod of an inbound / outbound conveying device for EPP packaging boxes provided by the present invention; Figure 8 This invention provides a schematic diagram of the connection structure between the slider, the fixing plate, and the U-shaped connecting rod of an inbound / outbound conveying device for EPP packaging boxes.

[0017] In the diagram: 1. Shelf; 2. Aisle track; 3. Mounting slide; 4. Lifting platform; 5. Vertical lift; 6. Conveyor; 7. Screw reciprocating mechanism; 8. Barcode scanner; 9. Support pad; 10. First multi-section hydraulic cylinder; 11. Reciprocating slide; 12. Support frame; 13. U-shaped frame; 14. Pick-and-place platform; 15. Multi-stage telescopic sleeve rod; 16. Base frame; 17. Rotating shaft; 18. Slider; 19. Fixing plate; 20. Lifting hydraulic cylinder; 21. U-shaped connecting rod; 22. Pressure roller; 23. Second multi-section hydraulic cylinder; 24. Extruded flexible sheet; 25. Clamping sleeve; 26. Telescopic cylinder; 27. Bidirectional telescopic cylinder; 28. Mounting frame; 29. ​​Servo motor; 30. Mounting rod; 31. Pressure sensor; 32. Damping ball; 33. Clamping rod; 34. U-shaped rod; 35. Pushing cylinder. 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 1-8 The device shown is an inbound and outbound conveying device for EPP packaging boxes, including a shelf 1, an aisle track 2, a vertical lift 5, and a screw reciprocating mechanism 7. The outer surface of the shelf 1 is distributed with multiple support rods for placing packaging boxes. The support rods are arranged at equal intervals along the height and depth of the shelf 1 to form multiple storage positions for EPP packaging boxes. The aisle track 2 is set on the ground on one side of the shelf 1. The aisle track 2 is slidably connected to the outside of the aisle track 2 and the bottom of the aisle track 3 is provided with a set of traveling wheels that cooperate with the aisle track 2. A vertical lift 5 is positioned above the mounting slide 3. The vertical lift 5 employs a conventional screw and nut lifting structure or a chain counterweight lifting structure. The vertical lift 5 is connected to two parallel support frames 12 via the lifting platform 4. A conveyor 6 is mounted above the two support frames 12. The conveyor 6 is a light-duty belt conveyor used for horizontally transporting EPP packaging boxes. A screw reciprocating mechanism 7 is located on one side of the conveyor 6. The screw reciprocating mechanism 7 includes a drive motor, a screw, and a guide rail. The reciprocating slide 11 is connected to a lifting support assembly. A bottom frame 16 is set above the lifting support assembly. Pushing and aligning assemblies are set on both sides of the bottom frame 16 to laterally clamp and align the multiple EPP packaging boxes placed on the bottom frame 16. A picking and delivering assembly is set on the side of the bottom frame 16 facing the shelf 1. The picking and delivering assembly is used to push the entire row of EPP packaging boxes stacked on the bottom frame 16 to the corresponding storage location of the shelf 1 at once, or to take out the entire row of EPP packaging boxes in the storage location of the shelf 1 at once and put them onto the bottom frame 16.

[0021] like Figure 1 and Figure 2 As shown, the lifting support assembly includes a first multi-section hydraulic cylinder 10. The first multi-section hydraulic cylinder 10 is a multi-stage telescopic hydraulic cylinder, which has a large telescopic stroke and strong load-bearing capacity. A support pad 9 is fixedly installed at the telescopic end of the first multi-section hydraulic cylinder 10. The support pad 9 is made of high-strength steel plate to ensure that the bottom frame 16 remains horizontal after being installed on the support pad 9. The bottom frame 16 is located above the support pad 9.

[0022] The independent vertical lifting and lowering adjustment of the base frame 16 is achieved by controlling the extension and retraction of the first multi-section hydraulic cylinder 10. This independent lifting is used to compensate for the alignment error in the height direction between the base frame 16 and the target storage location of the shelf 1 after the vertical lift 5 is lifted as a whole. It can also be used to move the base frame 16 out of the outside of a row of stacked packaging boxes and rise to the next stacking height during the stacking process.

[0023] like Figure 3 , Figure 6 and Figure 8 As shown, the push code assembly includes a U-shaped frame 13 with its U-shaped opening facing upwards. The U-shaped frame 13 is integrally formed or fixedly connected by a base plate and two vertical side plates. The two vertical side plates are parallel to each other and spaced apart. Slider blocks 18 are vertically slidably fitted at both ends of the U-shaped frame 13. Specifically, the two sliders 18 are slidably fitted onto the outer walls of the two vertical side plates of the U-shaped frame 13. The sliders 18 can slide up and down along the height direction of the vertical side plates. The sides of the two sliders 18 that are close to each other are connected by a fixing plate 19. The two ends of the fixing plate 19 are fixedly connected to the inner walls of the two sliders 18. The inner surface of the base frame 16 is fixed. A lifting hydraulic cylinder 20 is provided, and the telescopic end of the lifting hydraulic cylinder 20 is connected to the bottom of the fixed plate 19. When the lifting hydraulic cylinder 20 telescopics, it drives the fixed plate 19 and the two sliders 18 to slide up and down synchronously along the two vertical side plates of the U-shaped frame 13. A telescopic cylinder 26 is fixedly installed above the fixed plate 19 and located in the middle. A locking block is fixedly connected to the telescopic end of the telescopic cylinder 26. A U-shaped connecting rod 21 is installed through the middle of the locking block. Both ends of the U-shaped connecting rod 21 are provided with locking rods 33. One end of the two locking rods 33 slides through the interior of the corresponding slider 18. The ends of the two locking rods 33 away from the U-shaped connecting rod 21 are both embedded with damping balls 32, and the outer surface of the damping balls 32 is provided with a flexible layer.

[0024] When the telescopic cylinder 26 extends, the U-shaped connecting rod 21 extends to both sides, driving the subsequent clamping rod 33 and damping ball 32 to clamp the EPP packaging box from both sides. The damping ball 32 is a spherical ball structure. The damping ball 32 is rotatably embedded in the spherical groove opened at the end of the clamping rod 33, and part of the damping ball 32 protrudes outside the end face of the clamping rod 33. The flexible layer is made of polyurethane rubber or silicone rubber material, and the flexible layer wraps around the entire outer spherical surface of the damping ball 32.

[0025] Because the outer surface of the damping ball 32 is provided with a flexible layer, an elastic contact is formed between the flexible layer and the side wall of the packaging box. This generates sufficient static friction to clamp and fix the packaging box without damaging its surface. When the packaging box is received, the damping ball 32 can roll on the side wall of the packaging box, thereby allowing the packaging box to move in the front-to-back direction relative to the latch 33 while maintaining clamping contact, achieving coordinated clamping and rolling. This structural design ensures reliable clamping and positioning of the packaging box when stacking, and also ensures that the packaging box can move smoothly longitudinally without jamming during subsequent pushing.

[0026] It should be noted that the PLC control system adjusts the positive pressure of the damping ball bearing 32 on the side wall of the packaging box by controlling the extension air pressure of the telescopic cylinder 26, thereby achieving a balance between clamping firmness and smooth rolling.

[0027] like Figure 1 , Figure 2 and Figure 4 As shown, the pick-and-place component includes a mounting frame 28, which is fixedly mounted on the bottom frame 16 and close to the shelf 1. A second multi-section hydraulic cylinder 23 is fixedly mounted on the outside of the mounting frame 28. A pick-and-place platform 14 is fixedly mounted on the telescopic end of the second multi-section hydraulic cylinder 23. The pick-and-place platform 14 is a horizontally arranged flat plate structure. A pushing component is installed inside the mounting frame 28.

[0028] When a picking operation is required, the second multi-section hydraulic cylinder 23 extends, driving the picking platform 14 to extend above the support rod of the shelf 1, lifting the packaging box and then retracting it to the side near the bottom frame 16. When an inbound operation is required, the second multi-section hydraulic cylinder 23 extends again, pushing the packaging box on the picking platform 14 onto the support rod of the shelf 1.

[0029] like Figure 4 and Figure 5 As shown, the pushing component includes a bidirectional telescopic cylinder 27, which is fixedly installed inside the mounting frame 28. Mounting seats are fixedly installed at both ends of the bidirectional telescopic cylinder 27. A rotating shaft 17 is rotatably inserted inside the two mounting seats. A clamping sleeve 25 is fixedly fitted on the outside of the rotating shaft 17. Extrusion flexible sheets 24 are installed at equal intervals along the circumferential direction on the outside of the clamping sleeve 25. A servo motor 29 is fixedly installed at the bottom of the mounting seat. The output end of the servo motor 29 is connected to the lower end of the rotating shaft 17.

[0030] The bidirectional telescopic cylinder 27 is a double-rod cylinder, with its cylinder body fixedly installed in the center of the mounting frame 28. The two telescopic ends of the bidirectional telescopic cylinder 27 extend outwards along the length of the mounting frame 28. Two mounting seats are fixedly connected to the two telescopic ends of the bidirectional telescopic cylinder 27, and each mounting seat has an L-shaped structure.

[0031] The outer diameter of the clamping cylinder 25 is larger than the outer diameter of the rotating shaft 17. The extruded flexible sheet 24 is made of polyurethane or rubber material. The extruded flexible sheet 24 is evenly distributed along the outer circumference of the clamping cylinder 25. When the clamping cylinder 25 rotates, the ends of the extruded flexible sheet 24 contact the surface of the packaging box in sequence, generating friction to drive the packaging box to move.

[0032] like Figure 2 and Figure 7As shown, a barcode scanner 8 is fixedly installed above the support pad 9. A multi-stage telescopic sleeve rod 15 is symmetrically installed on the bottom frame 16 on the side closest to the barcode scanner 8. An installation rod 30 is correspondingly set above the two multi-stage telescopic sleeve rods 15. A push cylinder 35 is fixedly installed inside the two installation rods 30. A connecting block is fixedly installed at the telescopic end of the push cylinder 35. A shaft is connected between the two connecting blocks. A pressure roller 22 is rotatably sleeved on the outside of the shaft. A pressure sensor 31 is set at one end of the shaft.

[0033] The barcode scanner 8 uses an industrial-grade barcode scanner. It is fixedly mounted on the upper surface of the support platform 9 via a bracket, with the scanning window of the scanner 8 facing the shelf 1. The EPP packaging box labels are uniformly arranged on the front side facing the scanner 8. The data output of the scanner 8 is connected to the data input port of the PLC control system via a data cable. When the base frame 16 passes the stacked EPP packaging boxes during lifting, the scanner 8 sequentially scans the barcode labels on the front of each box and transmits the scanned barcode information to the PLC control system for information binding and traceability management.

[0034] The multi-stage telescopic rod 15 is composed of multiple sleeves with decreasing diameters connected sequentially, and the sleeves at each stage can slide relative to each other.

[0035] When the pressure roller 22 is subjected to axial force, the pressure sensor 31 outputs a corresponding electrical signal to the PLC control system. The PLC control system controls the extension air pressure of the push cylinder 35 according to the feedback signal of the pressure sensor 31, so that the pressure applied by the pressure roller 22 to the packaging box is kept within a preset reasonable range, avoiding excessive pressure that damages the packaging box or insufficient pressure that cannot effectively push the box. In addition, during the rising process of the bottom frame 16, the pressure roller 22 can be driven by the push cylinder 35 to roll along the side wall of the longitudinally stacked packaging boxes, thereby aligning them with a longitudinal line, which can improve the stability of the height when the conveyor 6 stops conveying.

[0036] like Figure 3 , Figure 4 and Figure 7 As shown, a U-shaped rod 34 is inserted through the middle of the two sets of mounting rods 30. The two ends of the U-shaped rod 34 are respectively connected to the outer wall of two sets of sliders 18 on the same side.

[0037] When the lifting hydraulic cylinder 20 drives the slider 18 to slide up and down along the U-shaped frame 13, the slider 18 drives the U-shaped rod 34 to rise and fall synchronously. The horizontal crossbar section of the U-shaped rod 34 drives the two mounting rods 30 to rise and fall synchronously, thus ensuring that the pushing cylinder 35 and the pressure roller 22 on the mounting rod 30 maintain synchronous rising and falling motion with the slider 18. This linkage structure ensures that the height position of the pressure roller 22 always maintains a fixed relative height relationship with the damping ball 32 at the end of the clamping rod 33, ensuring that the pressure roller 22 can accurately press against the corresponding height position of the packaging box when pushing it, avoiding pushing deviation or packaging box tipping due to mismatch in pressure height. At the same time, the U-shaped rod 34 connects the sliders 18 and mounting rods 30 on the left and right sides into a whole, improving the structural rigidity and motion synchronization of the entire pushing and aligning assembly during operation.

[0038] In summary, this device is connected to an external PLC control system to ensure the operation of each sequence and complete the warehousing or outbound operations.

[0039] Working principle: When this invention is in operation, the mounting slide 3 moves horizontally along the aisle track 2 laid on one side of the shelf 1, moving the entire equipment to the aisle position corresponding to the target storage location. Subsequently, the vertical lift 5 drives the lifting platform 4 to rise and fall vertically, and through the support frame 12, drives the conveyor 6 and the lead screw reciprocating mechanism 7 to rise or fall as a whole, so that the initial height of the base frame 16 is adapted to the height of the target storage layer on the shelf 1.

[0040] During retrieval, the lead screw reciprocating mechanism 7 drives the reciprocating slide 11 to move towards the corresponding vertical column of the shelf 1, bringing the bottom frame 16 closer to the side edge of the shelf 1. At this time, the second multi-section hydraulic cylinder 23 drives the pick-and-place platform 14 to extend into the lower end of the packaging box, then lifts the packaging box and moves it towards the side of the bottom frame 16. When it moves close to the extrusion flexible sheet 24, the corresponding servo motor 29 drives the rotating shaft 17 to rotate the clamping cylinder 25. The rotation of the extrusion flexible sheet 24 generates friction, which moves the packaging box from one side of the pick-and-place platform 14, causing the packaging box to move into the bottom frame 16. At the same time, the telescopic cylinders 26 at the U-shaped frames 13 on both sides push the U-shaped connecting rod 21 and the clamping rods 33 at both ends to extend outward. The damping balls 32 at the ends of the clamping rods 33 pre-clamp the lower middle side walls of the entire row of packaging boxes from the left and right sides. The flexible layer on the outer surface of the damping balls 32 can provide sufficient static friction while avoiding scratching the box body. At this point, the entire row of packaging boxes is firmly restrained in the horizontal direction and cannot tilt to the left or right. Under the continuous clamping state of the damping ball 32, the lifting hydraulic cylinder 20 drives the current packaging box to be placed on the upper surface of the conveyor 6. Then, the vertical lift 5 drives the lifting platform 4 to move downward to stack the packaging boxes of the second row of the same column. As in the previous steps, only the height needs to be adjusted. After three to four packaging boxes are stacked in a column, another column can be stacked. At this time, the overall structure of the bottom frame 16 is lifted by the first multi-section hydraulic cylinder 10 and moved out from the outside of the currently stacked column. Then, a new column is stacked from low to high. During the upward movement, the barcode scanner 8 located at the support pad 9 scans the barcode of the front packaging box in sequence to complete the information binding. After multiple columns are stacked, the conveyor 6 can output to the front, and the bottom frame 16 moves to a position higher than the top layer of the target column packaging box to reduce interference.

[0041] When the boxes are put into storage, the entire row of boxes is already stacked by the conveyor 6. The boxes are moved by the aisle track 2 so that they are close to the shelf 1. Then, the first multi-section hydraulic cylinder 10 drives the support pad 9 and the bottom frame 16 to descend vertically from above until the bottom frame 16 is placed on the box above. The box is then pushed from above onto the corresponding support rod of the shelf 1. Specifically, before the vertical push, the telescopic cylinder 26 immediately drives the U-shaped connecting rod 21 and the clamping rod 33 to extend, so that the damping balls 32 on both sides tightly clamp the sides of the current box from the left and right directions.

[0042] It should be noted that, due to the vertical stacking of the packaging boxes, which results in a considerable height, they are prone to wobbling and collapsing during pushing without lateral clamping. The clamping force of the damping ball bearings 32 ensures that the entire row of packaging boxes is uniformly positioned horizontally and that each box remains tightly arranged, forming a stable whole. While the damping ball bearings 32 are continuously clamping the boxes, the pushing cylinder 35 extends, and the pressure roller 22 abuts against the outer wall of the front end of the packaging box from the rear or side. The pressure sensor 31 monitors the pressure to ensure that the force is appropriate, and the boxes are conveyed to one side of the pick-and-place platform 14. During this process, the servo motor 29 drives the squeezing flexible sheet 24 on the clamping cylinder 25 to rotate in the opposite direction, applying a longitudinal pushing force towards the inside of the shelf 1 to the entire row of packaging boxes, causing the packaging boxes to fall onto the pick-and-place platform 14. Then, through the conveying of the second multi-section hydraulic cylinder 23, the packaging boxes are pushed onto the support rod and placed securely. Then, following this step sequence from top to bottom, the vertical pushing and warehousing operation of the packaging boxes is completed column by column. An inbound and outbound conveying device for EPP packaging boxes includes a shelf 1, an aisle track 2, a vertical lift 5, and a screw reciprocating mechanism 7. The outer surface of the shelf 1 is distributed with multiple support rods for placing packaging boxes. Each support rod is arranged at equal intervals along the height and depth directions of the shelf 1 to form multiple storage positions for storing EPP packaging boxes. The aisle track 2 is set on the ground on one side of the shelf 1. The aisle track 2 is slidably connected to the outside of the aisle track 2. The bottom of the mounting slide 3 is provided with a set of traveling wheels that cooperate with the aisle track 2. A vertical lift 5 is positioned above the mounting slide 3. The vertical lift 5 employs a conventional screw and nut lifting structure or a chain counterweight lifting structure. The vertical lift 5 is connected to two parallel support frames 12 via the lifting platform 4. A conveyor 6 is mounted above the two support frames 12. The conveyor 6 is a light-duty belt conveyor used for horizontally transporting EPP packaging boxes. A screw reciprocating mechanism 7 is located on one side of the conveyor 6. The screw reciprocating mechanism 7 includes a drive motor, a screw, and a guide rail. The reciprocating slide 11 is connected to a lifting support assembly. A bottom frame 16 is set above the lifting support assembly. Pushing and aligning assemblies are set on both sides of the bottom frame 16 to laterally clamp and align the multiple EPP packaging boxes placed on the bottom frame 16. A picking and delivering assembly is set on the side of the bottom frame 16 facing the shelf 1. The picking and delivering assembly is used to push the entire row of EPP packaging boxes stacked on the bottom frame 16 to the corresponding storage location of the shelf 1 at once, or to take out the entire row of EPP packaging boxes in the storage location of the shelf 1 at once and put them onto the bottom frame 16.

[0043] like Figure 1 and Figure 2As shown, the lifting support assembly includes a first multi-section hydraulic cylinder 10. The first multi-section hydraulic cylinder 10 is a multi-stage telescopic hydraulic cylinder, which has a large telescopic stroke and strong load-bearing capacity. A support pad 9 is fixedly installed at the telescopic end of the first multi-section hydraulic cylinder 10. The support pad 9 is made of high-strength steel plate to ensure that the bottom frame 16 remains horizontal after being installed on the support pad 9. The bottom frame 16 is located above the support pad 9.

[0044] The independent vertical lifting and lowering adjustment of the base frame 16 is achieved by controlling the extension and retraction of the first multi-section hydraulic cylinder 10. This independent lifting is used to compensate for the alignment error in the height direction between the base frame 16 and the target storage location of the shelf 1 after the vertical lift 5 is lifted as a whole. It can also be used to move the base frame 16 out of the outside of a row of stacked packaging boxes and rise to the next stacking height during the stacking process.

[0045] like Figure 3 , Figure 6 and Figure 8 As shown, the push code assembly includes a U-shaped frame 13 with its U-shaped opening facing upwards. The U-shaped frame 13 is integrally formed or fixedly connected by a base plate and two vertical side plates. The two vertical side plates are parallel to each other and spaced apart. Slider blocks 18 are vertically slidably fitted at both ends of the U-shaped frame 13. Specifically, the two sliders 18 are slidably fitted onto the outer walls of the two vertical side plates of the U-shaped frame 13. The sliders 18 can slide up and down along the height direction of the vertical side plates. The sides of the two sliders 18 that are close to each other are connected by a fixing plate 19. The two ends of the fixing plate 19 are fixedly connected to the inner walls of the two sliders 18. The inner surface of the base frame 16 is fixed. A lifting hydraulic cylinder 20 is provided, and the telescopic end of the lifting hydraulic cylinder 20 is connected to the bottom of the fixed plate 19. When the lifting hydraulic cylinder 20 telescopics, it drives the fixed plate 19 and the two sliders 18 to slide up and down synchronously along the two vertical side plates of the U-shaped frame 13. A telescopic cylinder 26 is fixedly installed above the fixed plate 19 and located in the middle. A locking block is fixedly connected to the telescopic end of the telescopic cylinder 26. A U-shaped connecting rod 21 is installed through the middle of the locking block. Both ends of the U-shaped connecting rod 21 are provided with locking rods 33. One end of the two locking rods 33 slides through the interior of the corresponding slider 18. The ends of the two locking rods 33 away from the U-shaped connecting rod 21 are both embedded with damping balls 32, and the outer surface of the damping balls 32 is provided with a flexible layer.

[0046] When the telescopic cylinder 26 extends, the U-shaped connecting rod 21 extends to both sides, driving the subsequent clamping rod 33 and damping ball 32 to clamp the EPP packaging box from both sides. The damping ball 32 is a spherical ball structure. The damping ball 32 is rotatably embedded in the spherical groove opened at the end of the clamping rod 33, and part of the damping ball 32 protrudes outside the end face of the clamping rod 33. The flexible layer is made of polyurethane rubber or silicone rubber material, and the flexible layer wraps around the entire outer spherical surface of the damping ball 32.

[0047] Because the outer surface of the damping ball 32 is provided with a flexible layer, an elastic contact is formed between the flexible layer and the side wall of the packaging box. This generates sufficient static friction to clamp and fix the packaging box without damaging its surface. When the packaging box is received, the damping ball 32 can roll on the side wall of the packaging box, thereby allowing the packaging box to move in the front-to-back direction relative to the latch 33 while maintaining clamping contact, achieving coordinated clamping and rolling. This structural design ensures reliable clamping and positioning of the packaging box when stacking, and also ensures that the packaging box can move smoothly longitudinally without jamming during subsequent pushing.

[0048] It should be noted that the PLC control system adjusts the positive pressure of the damping ball bearing 32 on the side wall of the packaging box by controlling the extension air pressure of the telescopic cylinder 26, thereby achieving a balance between clamping firmness and smooth rolling.

[0049] like Figure 1 , Figure 2 and Figure 4 As shown, the pick-and-place component includes a mounting frame 28, which is fixedly mounted on the bottom frame 16 and close to the shelf 1. A second multi-section hydraulic cylinder 23 is fixedly mounted on the outside of the mounting frame 28. A pick-and-place platform 14 is fixedly mounted on the telescopic end of the second multi-section hydraulic cylinder 23. The pick-and-place platform 14 is a horizontally arranged flat plate structure. A pushing component is installed inside the mounting frame 28.

[0050] When a picking operation is required, the second multi-section hydraulic cylinder 23 extends, driving the picking platform 14 to extend above the support rod of the shelf 1, lifting the packaging box and then retracting it to the side near the bottom frame 16. When an inbound operation is required, the second multi-section hydraulic cylinder 23 extends again, pushing the packaging box on the picking platform 14 onto the support rod of the shelf 1.

[0051] like Figure 4 and Figure 5 As shown, the pushing component includes a bidirectional telescopic cylinder 27, which is fixedly installed inside the mounting frame 28. Mounting seats are fixedly installed at both ends of the bidirectional telescopic cylinder 27. A rotating shaft 17 is rotatably inserted inside the two mounting seats. A clamping sleeve 25 is fixedly fitted on the outside of the rotating shaft 17. Extrusion flexible sheets 24 are installed at equal intervals along the circumferential direction on the outside of the clamping sleeve 25. A servo motor 29 is fixedly installed at the bottom of the mounting seat. The output end of the servo motor 29 is connected to the lower end of the rotating shaft 17.

[0052] The bidirectional telescopic cylinder 27 is a double-rod cylinder, with its cylinder body fixedly installed in the center of the mounting frame 28. The two telescopic ends of the bidirectional telescopic cylinder 27 extend outwards along the length of the mounting frame 28. Two mounting seats are fixedly connected to the two telescopic ends of the bidirectional telescopic cylinder 27, and each mounting seat has an L-shaped structure.

[0053] The outer diameter of the clamping cylinder 25 is larger than the outer diameter of the rotating shaft 17. The extruded flexible sheet 24 is made of polyurethane or rubber material. The extruded flexible sheet 24 is evenly distributed along the outer circumference of the clamping cylinder 25, and the number is 6 to 12. When the clamping cylinder 25 rotates, the ends of the extruded flexible sheet 24 contact the surface of the packaging box in sequence, generating friction to drive the packaging box to move.

[0054] like Figure 2 and Figure 7 As shown, a barcode scanner 8 is fixedly installed above the support pad 9. A multi-stage telescopic sleeve rod 15 is symmetrically installed on the bottom frame 16 on the side closest to the barcode scanner 8. An installation rod 30 is correspondingly set above the two multi-stage telescopic sleeve rods 15. A push cylinder 35 is fixedly installed inside the two installation rods 30. A connecting block is fixedly installed at the telescopic end of the push cylinder 35. A shaft is connected between the two connecting blocks. A pressure roller 22 is rotatably sleeved on the outside of the shaft. A pressure sensor 31 is set at one end of the shaft.

[0055] The barcode scanner 8 is an industrial-grade barcode scanner. It is fixedly mounted on the upper surface of the support platform 9 via a bracket, with its scanning window facing the shelf 1. The data output of the barcode scanner 8 is connected to the data input port of the PLC control system via a data cable. When the base frame 16 passes by the stacked EPP packaging boxes during its lifting process, the barcode scanner 8 sequentially scans the barcode labels on the front of each packaging box and transmits the scanned barcode information to the PLC control system for information binding and traceability management.

[0056] The multi-stage telescopic rod 15 is composed of multiple sleeves with decreasing diameters connected sequentially, and the sleeves at each stage can slide relative to each other.

[0057] When the pressure roller 22 is subjected to axial force, the pressure sensor 31 outputs a corresponding electrical signal to the PLC control system. The PLC control system controls the extension air pressure of the push cylinder 35 according to the feedback signal of the pressure sensor 31, so that the pressure applied by the pressure roller 22 to the packaging box is kept within a preset reasonable range, avoiding excessive pressure that damages the packaging box or insufficient pressure that cannot effectively push the box. In addition, during the rising process of the bottom frame 16, the pressure roller 22 can be driven by the push cylinder 35 to roll along the side wall of the longitudinally stacked packaging boxes, thereby aligning them with a longitudinal line, which can improve the stability of the height when the conveyor 6 stops conveying.

[0058] like Figure 3 , Figure 4 and Figure 7 As shown, a U-shaped rod 34 is inserted through the middle of the two sets of mounting rods 30. The two ends of the U-shaped rod 34 are respectively connected to the outer wall of two sets of sliders 18 on the same side.

[0059] When the lifting hydraulic cylinder 20 drives the slider 18 to slide up and down along the U-shaped frame 13, the slider 18 drives the U-shaped rod 34 to rise and fall synchronously. The horizontal crossbar section of the U-shaped rod 34 drives the two mounting rods 30 to rise and fall synchronously, thus ensuring that the pushing cylinder 35 and the pressure roller 22 on the mounting rod 30 maintain synchronous rising and falling motion with the slider 18. This linkage structure ensures that the height position of the pressure roller 22 always maintains a fixed relative height relationship with the damping ball 32 at the end of the clamping rod 33, ensuring that the pressure roller 22 can accurately press against the corresponding height position of the packaging box when pushing it, avoiding pushing deviation or packaging box tipping due to mismatch in pressure height. At the same time, the U-shaped rod 34 connects the sliders 18 and mounting rods 30 on the left and right sides into a whole, improving the structural rigidity and motion synchronization of the entire pushing and aligning assembly during operation.

[0060] In summary, this device is connected to an external PLC control system to ensure the operation of each sequence, thereby completing the inbound or outbound process.

[0061] Working principle: When this invention is in operation, the mounting slide 3 moves horizontally along the aisle track 2 laid on one side of the shelf 1, moving the entire equipment to the aisle position corresponding to the target storage location. Subsequently, the vertical lift 5 drives the lifting platform 4 to rise and fall vertically, and through the support frame 12, drives the conveyor 6 and the lead screw reciprocating mechanism 7 to rise or fall as a whole, so that the initial height of the base frame 16 is adapted to the height of the target storage layer on the shelf 1.

[0062] During retrieval, the lead screw reciprocating mechanism 7 drives the reciprocating slide 11 to move towards the corresponding vertical column of the shelf 1, bringing the bottom frame 16 closer to the side edge of the shelf 1. At this time, the second multi-section hydraulic cylinder 23 drives the support pad 9 to extend into the lower end of the packaging box, then lifts the packaging box and moves it towards the bottom frame 16. When it moves close to the extrusion flexible sheet 24, the corresponding servo motor 29 drives the rotating shaft 17 to rotate the clamping cylinder 25. The rotation of the extrusion flexible sheet 24 generates friction, which moves the packaging box from one side of the pick-and-place table 14, causing the packaging box to move into the bottom frame 16. At the same time, the telescopic cylinders 26 at the U-shaped frames 13 on both sides push the U-shaped connecting rod 21 and the clamping rods 33 at both ends to extend outward. The damping balls 32 at the ends of the clamping rods 33 pre-clamp the lower middle side walls of the entire row of packaging boxes from the left and right sides. The flexible layer on the outer surface of the damping balls 32 can provide sufficient static friction while avoiding scratching the box body. At this point, the entire row of packaging boxes is firmly restrained in the horizontal direction and cannot tilt to the left or right. Under the continuous clamping state of the damping ball 32, the lifting hydraulic cylinder 20 drives the current packaging box to be placed on the upper surface of the conveyor 6. Then, the vertical lift 5 drives the lifting platform 4 to move downward to stack the packaging boxes of the second row of the same column. As in the previous steps, only the height needs to be adjusted. After three to four packaging boxes are stacked in a column, another column can be stacked. At this time, the overall structure of the bottom frame 16 is lifted by the first multi-section hydraulic cylinder 10 and moved out from the outside of the currently stacked column. Then, a new column is stacked from low to high. During the upward movement, the barcode scanner 8 located at the support pad 9 scans the barcode of the front packaging box in sequence to complete the information binding. After multiple columns are stacked, the conveyor 6 can output to the front, and the bottom frame 16 moves to a position higher than the top layer of the target column packaging box to reduce interference.

[0063] When the boxes are put into storage, the entire row of boxes is already stacked by the conveyor 6. The boxes are moved by the aisle track 2 so that they are close to the shelf 1. Then, the first multi-section hydraulic cylinder 10 drives the support pad 9 and the bottom frame 16 to descend vertically from above until the bottom frame 16 is placed on the box above. The box is then pushed from above onto the corresponding support rod of the shelf 1. Specifically, before the vertical push, the telescopic cylinder 26 immediately drives the U-shaped connecting rod 21 and the clamping rod 33 to extend, so that the damping balls 32 on both sides tightly clamp the sides of the current box from the left and right directions.

[0064] It should be noted that, since the packaging boxes are stacked vertically and are quite tall, they are prone to shaking and collapsing during pushing without lateral clamping. The clamping force of the damping ball bearings 32 ensures that the entire row of packaging boxes is in a uniform horizontal position and that each box is tightly arranged to form a stable whole. Under the continuous clamping state of the damping ball bearings 32, the pushing cylinder 35 extends, and the pressure roller 22 abuts against the outer wall of the front end of the packaging box from the rear or side. The pressure sensor 31 monitors the pressure to ensure that the force is moderate and conveys the box to one side of the pick-and-place platform 14. During the process, the servo motor 29 drives the squeezing flexible sheet 24 on the clamping cylinder 25 to rotate in the opposite direction, applying a longitudinal pushing force towards the inside of the shelf 1 to the entire row of packaging boxes, causing the packaging boxes to fall above the pick-and-place platform 14. Then, through the conveying of the second multi-section hydraulic cylinder 23, the packaging boxes are pushed onto the support rod and placed. Then, following this sequence, the vertical pushing and warehousing operation of the packaging boxes is completed row by row from top to bottom.

[0065] 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 warehouse conveying device for EPP packaging boxes, comprising a shelf (1), an aisle track (2), a vertical lift (5), and a screw reciprocating mechanism (7), characterized in that, The outer surface of the shelf (1) is distributed with multiple support rods for placing packaging boxes. The aisle track (2) is set on the ground on one side of the shelf (1). The aisle track (2) is slidably connected to the outside of the mounting slide (3). The vertical lift (5) is set above the mounting slide (3). The vertical lift (5) is connected to two parallel support frames (12) through the lifting platform (4). The conveyor (6) is set above the two sets of support frames (12). The screw reciprocating mechanism (7) is set on one side of the conveyor (6). The screw reciprocating mechanism (7) is connected to the lifting support assembly through the reciprocating slide (11). The lifting support assembly is set above the bottom frame (16). Pushing and aligning components are set on both sides of the bottom frame (16). The bottom frame (16) facing the shelf (1) is set with a picking and delivering component.

2. The inbound and outbound conveying device for EPP packaging boxes according to claim 1, characterized in that, The lifting support assembly includes a first multi-section hydraulic cylinder (10), and a support pad (9) is fixedly provided at the telescopic end of the first multi-section hydraulic cylinder (10). The bottom frame (16) is located above the support pad (9).

3. The inbound and outbound conveying device for EPP packaging boxes according to claim 1, characterized in that, The push code assembly includes a U-shaped frame (13) with the U-shaped opening facing upwards. Both ends of the U-shaped frame (13) are vertically slidably fitted with sliders (18). The two sliders (18) are connected to each other on the side closest to each other through a fixing plate (19). A lifting hydraulic cylinder (20) is fixedly installed on the inner surface of the bottom frame (16). The telescopic end of the lifting hydraulic cylinder (20) is connected to the bottom of the fixing plate (19). A telescopic cylinder (26) is fixedly installed above the fixing plate (19) and in the middle. A locking block is fixedly connected to the telescopic end of the telescopic cylinder (26). A U-shaped connecting rod (21) is installed through the middle of the inside of the locking block.

4. The inbound and outbound conveying device for EPP packaging boxes according to claim 3, characterized in that, Both ends of the U-shaped connecting rod (21) are provided with locking rods (33). One end of each locking rod (33) slides through the interior of the corresponding slider (18). The ends of the two locking rods (33) away from the U-shaped connecting rod (21) are each fitted with damping balls (32), and the outer surface of the damping balls (32) is provided with a flexible layer.

5. The inbound and outbound conveying device for EPP packaging boxes according to claim 1, characterized in that, The picking and delivering component includes a mounting frame (28), which is fixedly mounted on the bottom frame (16) and close to the shelf (1) on one side. A second multi-section hydraulic cylinder (23) is fixedly mounted on the outside of the mounting frame (28), and a picking and placing platform (14) is fixedly mounted on the telescopic end of the second multi-section hydraulic cylinder (23). A pushing component is provided inside the mounting frame (28).

6. The inbound and outbound conveying device for EPP packaging boxes according to claim 5, characterized in that, The pushing component includes a bidirectional telescopic cylinder (27), which is fixedly installed inside the mounting frame (28). Both ends of the bidirectional telescopic cylinder (27) are fixedly installed with mounting seats. A rotating shaft (17) is rotatably inserted inside the two mounting seats. A clamping sleeve (25) is fixedly fitted on the outside of the rotating shaft (17). A compression flexible sheet (24) is installed at equal intervals along the circumferential direction on the outside of the clamping sleeve (25). A servo motor (29) is fixedly installed at the bottom of the mounting seat. The output end of the servo motor (29) is connected to the lower end of the rotating shaft (17).

7. The inbound and outbound conveying device for EPP packaging boxes according to claim 2, characterized in that, A barcode scanner (8) is fixedly installed above the support pad (9). A multi-stage telescopic sleeve rod (15) is symmetrically installed on the bottom frame (16) and on the side near the barcode scanner (8). An installation rod (30) is correspondingly provided above the two multi-stage telescopic sleeve rods (15). A push cylinder (35) is fixedly installed inside the two installation rods (30). A connecting block is fixedly installed at the telescopic end of the push cylinder (35). A shaft is connected between the two connecting blocks. A pressure roller (22) is rotatably sleeved on the outside of the shaft. A pressure sensor (31) is provided at one end of the shaft.

8. The inbound and outbound conveying device for EPP packaging boxes according to claim 7, characterized in that, A U-shaped rod (34) is inserted in the middle of the two sets of mounting rods (30), and the two ends of the U-shaped rod (34) are respectively connected to the outer wall of two sets of sliders (18) on the same side.

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