Stacking device for polyethylene plate processing

Abstract

The invention discloses a stacking device for polyethylene plate processing, which belongs to the technical field of stacking machines and comprises a stacking mechanism for stacking polyethylene plates. The stacking mechanism is provided with a plate placing mechanism used for placing polyethylene plates and a conveying mechanism used for conveying the polyethylene plates to different positions according to different lengths and widths of the polyethylene plates. The length and width size of each polyethylene plate can be automatically identified, so that the plates of different specifications are accurately conveyed and stacked to preset spatial positions of different layers and different columns in a stereoscopic warehouse; the stereoscopic warehouse adopts a multi-layer and multi-column layout, the space utilization rate is high, and a unique extending rack step-by-step pushing mechanism is adopted, so that the meshing stroke of a moving gear can be automatically matched and extended according to the length of a plate, and the conveying mechanism can reach a far-end warehouse location of the stereoscopic warehouse; and the plates with different lengths can be conveyed to a specified column.

Description

Technical Field

[0001] This invention relates to the field of stacker crane technology, and in particular to a stacking device for processing polyethylene sheets. Background Technology

[0002] Polyethylene sheets, a common industrial material, are widely used in construction, packaging, and machinery manufacturing. During their production and processing, the stacking and storage management of these sheets directly impacts production efficiency, space utilization, and product quality. Traditional stacking methods rely heavily on manual operation or simple stacking racks, which are not only labor-intensive and inefficient but also difficult to classify and store by specifications, easily causing sheet deformation, scratches, or chaotic stacking, making subsequent retrieval inconvenient. Currently, some companies use fixed storage racks or simple conveying equipment for sheet stacking, but these devices are usually unable to flexibly adapt to the storage needs of sheets of different sizes. Especially in multi-specification, small-batch production models, existing stacking equipment lacks automatic identification and sorting functions, still requiring manual measurement of dimensions and adjustment of stacking positions, resulting in low work efficiency and high error rates. With the development of automation technology, automated warehouse systems are gradually being applied to material storage, but their application in handling flexible sheets like polyethylene sheets still has certain limitations. For example, existing automated stacking equipment often lacks a dynamic adjustment mechanism for sheet dimensions, cannot automatically allocate storage locations based on sheet length and width, and cannot achieve adaptive expansion of conveying distance. Deviations can easily occur during mechanical pushing, positioning, and lifting, affecting stacking accuracy and potentially causing equipment jamming or damage to the sheets. Therefore, there is an urgent need to develop a dedicated polyethylene sheet stacking device that can automatically identify sheet dimensions, adaptively adjust conveying and stacking positions, and achieve efficient and precise stacking. This would improve warehouse automation, reduce manual intervention, optimize space utilization, and ensure the quality of sheet stacking. Summary of the Invention

[0003] To address the aforementioned technical problems, the present invention adopts the following technical solution: a stacking device for processing polyethylene sheets, comprising a stacking mechanism for stacking polyethylene sheets, the stacking mechanism comprising a base plate, and the stacking mechanism being provided with a plate placement mechanism for placing polyethylene sheets and a conveying mechanism for conveying polyethylene sheets to different positions according to their length and width. The stacking mechanism includes guide rails fixedly installed on the base plate, an automated warehouse fixedly installed on the base plate, the automated warehouse consisting of multiple layers and columns of space, an active rack slidingly installed on the factory floor, and a traveling rack fixedly installed on the base plate.

[0004] Furthermore, the stacking mechanism also includes multiple inner push rods slidably installed at the bottom of the automated warehouse. Inner push rods are fixedly installed with inner push bars and extended racks. An electromagnet is provided on the extended rack. A return spring is provided between the inner push bars and the bottom plate. An inclined surface is provided on the inner push bars and the active rack is provided with an inclined surface. In the initial state, the inclined surface of the active rack is in contact with the inclined surface of the inner push bar closest to the active rack.

[0005] Furthermore, multiple pop-out blocks are slidably installed inside the guide rail, each pop-out block has two inclined surfaces, and a spring is provided between the pop-out block and the guide rail.

[0006] As the drive rack slides along the factory floor, it pushes the inner push bar, inner push rod, and extension rack relative to the automated warehouse via an inclined plane. The return spring is compressed, aligning the extension rack with the traveling rack, allowing the conveyor mechanism to transport materials over longer distances. At this point, the electromagnet on the extension rack attracts the base plate, maintaining its position. After the first inner push bar is fully extended, the drive rack continues to slide. When the drive rack contacts the inclined plane of the second inner push bar, it pushes the second inner push bar, inner push rod, and extension rack relative to the automated warehouse, causing the second extension rack to be extended, aligning with the previously extended extension rack. The traveling racks align and repeat sequentially. The further the active rack slides, the more the extended rack extends, and the further the conveying mechanism can move to. When the moving frame moves to the designated space in the automated warehouse, the slot at the bottom of the moving frame reaches the top of the pop-up block. First, the moving frame presses down the pop-up block, compressing the springs under the pop-up block and guide rail. When the slot reaches the top of the pop-up block, the springs between the pop-up block and the base plate rebound to position the moving frame. Depending on the length of the polyethylene sheet, the moving frame stops at different columns in the automated warehouse, and then, depending on the width of the polyethylene sheet, it is placed on different layers of the automated warehouse.

[0007] Furthermore, the conveying mechanism includes a movable frame slidably mounted on a guide rail, a lifting plate slidably mounted inside the movable frame, four conveying wheels rotatably mounted on the lifting plate, a conveyor belt wrapped around every two conveying wheels, two conveying motors fixedly mounted on the lower surface of the lifting plate, the conveying motors driving the conveying wheels to rotate via belt drive, a movable motor fixedly mounted on the movable frame, a movable gear rotatably mounted on the movable frame, the movable motor driving the movable gear to rotate via belt drive, and the movable gear meshing with a traveling rack.

[0008] Furthermore, a lifting electric cylinder is fixedly installed on the movable frame, an active slider is slidably installed inside the movable frame, the active slider is fixedly installed with the output end of the lifting electric cylinder, two toothed blocks are fixedly installed on the active slider, an active lifting rod is rotatably installed on the active slider, a bottom block is fixedly installed on the lower surface of the lifting plate, the active lifting rod is rotatably installed with the bottom block, and four slots are provided at the bottom of the movable frame.

[0009] Furthermore, a front block is fixedly installed on the lower surface of the lifting plate, four transmission wheels are rotatably installed on the lower surface of the lifting plate, two transmission wheels are wrapped with transmission toothed belts, a passive toothed block is slidably installed inside the moving frame, the toothed block meshes with the transmission toothed belt, the passive toothed block meshes with the transmission toothed belt, a passive lifting rod is rotatably installed on the passive toothed block, and the passive lifting rod is rotatably installed with the front block.

[0010] The mobile motor drives the mobile gear to rotate via a transmission belt. The mobile gear meshes with the traveling rack, causing the mobile frame to slide along the guide rail. After the extended rack extends, the mobile gear continues to mesh with it. When it reaches the designated column in the automated warehouse, the extension distance of the lifting cylinder is controlled according to the width of the polyethylene sheet. The extension of the lifting cylinder causes the active slider and toothed block to slide along the mobile frame, thereby causing the active lifting rod to rotate. The active lifting rod causes the bottom block and lifting plate to rise. At the same time, the toothed block drives the transmission belt to rotate, and the transmission belt causes the passive toothed block to slide along the mobile frame, thereby causing the passive lifting rod to rotate. The passive lifting rod causes the front block and lifting plate to rise synchronously, so that the lifting plate rises to the designated layer of the automated warehouse. Then, the robotic arm installed in the automated warehouse puts the polyethylene sheet on the lifting plate into the automated warehouse. Afterward, the mobile frame returns to the initial position, the electromagnet on the extended rack is de-energized, and the return spring rebounds, so that all the extended racks and inner push bars that have been extended are reset.

[0011] Furthermore, the plate-laying mechanism includes a plate-feeding frame fixedly mounted on the base plate, an extension frame fixedly mounted on the plate-feeding frame, a pusher motor fixedly mounted below the extension frame, a bottom shaft rotatably mounted below the extension frame, an intermediate gear fixedly mounted on the bottom shaft, the pusher motor driving the bottom shaft to rotate via a transmission belt, two pusher gears rotatably mounted on the extension frame, an inner convex ball fixedly mounted inside the pusher gear, an external threaded column slidably mounted on the extension frame, the inner convex ball sliding in the thread of the external threaded column, a pusher plate fixedly mounted on the external threaded column, and the bottom shaft driving the pusher gears to rotate via a transmission belt.

[0012] Furthermore, two width measuring plates are slidably mounted on the plate feeding frame. The width measuring plates are provided with inclined surfaces, and a transverse spring is provided between the two width measuring plates. A long push plate is slidably mounted on the plate feeding frame, and a push plate is fixedly mounted on the long push plate. A push plate spring is provided between the long push plate and the plate feeding frame. An extension frame is fixedly mounted on the plate feeding frame, and a push plate convex ball is fixedly mounted on the push plate. A threaded rod is rotatably mounted on the extension frame. The push plate convex ball slides in the thread of the threaded rod. A rotating gear is fixedly mounted on the threaded rod. A mating gear is rotatably mounted below the extension frame. The rotating gear drives the mating gear to rotate through gear transmission. The mating gear meshes with the drive rack.

[0013] Furthermore, two opening and closing plates are slidably installed on the plate feeding frame, and a spring is provided between the opening and closing plates and the plate feeding frame. An opening and closing rack is fixedly installed below the opening and closing plates. A push frame is slidably installed on the plate feeding frame, and a spring is provided between the push frame and the plate feeding frame. Two docking blocks are provided on the push frame, and the docking blocks slide inside the plate feeding frame. Two protruding blocks are fixedly installed on the push plate. An inner docking gear and an outer docking gear are rotatably installed on the push frame. The inner docking gear drives the outer docking gear to rotate through a transmission belt and gear transmission.

[0014] The polyethylene sheet to be stored is placed on the extension rack. The push plate motor drives the bottom shaft and intermediate gear to rotate via belt drive. The bottom shaft drives the push gear to rotate via belt drive. The push gear drives the external threaded column and push plate to slide inward via the inner convex ball. The push plate pushes the polyethylene sheet on the extension rack towards the feeding rack. When the polyethylene sheet contacts the inclined surface of the width measuring plate, the two width measuring plates are pushed outward, and the horizontal spring is stretched. The width of the polyethylene sheet is determined based on the outward movement distance of the width measuring plate, and the extension amount of the lifting cylinder is determined by the width. When the polyethylene sheet contacts the long push plate, the polyethylene sheet reaches the opening and closing plate, pushing the long push plate and the push plate to slide along the feeding rack. The push plate spring is compressed. The push plate drives the threaded rod and rotating gear to rotate via the push plate convex ball. The rotating gear drives the docking gear to rotate via gear transmission. The docking gear drives the drive rack to slide. When the push plate moves to contact the feeding rack, the protrusion pushes the docking block and the push frame to slide. The length measurement is now complete. The active rack stops sliding. The extended rack, which has already been pushed out, is attracted to the base plate by an electromagnet. The pusher slides, causing the inner docking gear to mesh with the middle gear, and the outer docking gear to mesh with the opening and closing rack. The middle gear drives the inner docking gear to rotate, and the inner docking gear drives the outer docking gear to rotate through belt drive and gear drive. This causes the two opening and closing racks and the opening and closing plate to slide outward, allowing the polyethylene sheet on the opening and closing plate to fall onto the lifting plate. Then, the push plate spring rebounds, causing the long push plate, threaded rod, and docking gear to reset. However, the extended rack, which has already been pushed out, is attracted to the base plate by the electromagnet and will not reset. The horizontal spring rebounds, causing the width measuring plate to reset. At the same time, the push plate motor reverses, causing the push plate to reset. The spring between the pusher and the plate feeding frame causes the pusher to reset, causing the outer docking gear to disengage from the opening and closing rack, and the inner docking gear to disengage from the middle gear. The spring between the opening and closing plate and the plate feeding frame rebounds, causing the opening and closing plate to reset.

[0015] The beneficial effects of this invention compared with the prior art are: (1) By setting up structures such as the width measuring plate and the long push plate, this invention can automatically identify the length and width of each polyethylene sheet, and automatically control the extension distance of the lifting cylinder and the horizontal movement distance of the moving frame accordingly, so as to accurately transport and stack the sheets of different specifications into the preset spatial positions of different layers and columns in the automated warehouse, completely avoiding the errors and chaos that may be caused by manual sorting and stacking, and greatly improving the accuracy of stacking and the level of intelligent warehouse management; (2) The automated warehouse set up by this invention adopts a multi-layer and multi-column layout with high space utilization. The unique step-by-step push mechanism of the extending rack allows the meshing stroke of the moving gear to be automatically matched and extended according to the length of the sheet, so that the conveying mechanism can reach the desired height. The remote storage location of the automated warehouse enables the storage of more boards within a limited area and ensures that boards of different lengths can be sent to their designated columns. The entire process of placing, conveying, and storing boards is continuously automated, which greatly reduces the processing time of a single board and improves the overall stacking efficiency. (3) The moving frame set in this invention moves by reliable meshing of the moving gear, the walking rack, and the extended rack. It runs smoothly. When it moves to the target storage location, the slot and the pop-out block can achieve automatic mechanical positioning under the action of the spring. This effectively eliminates the positioning error that may exist in the walking motor and ensures that the moving frame can accurately stop at the designated position each time it is conveyed. This provides a solid foundation for subsequent lifting and robotic arm grabbing and prevents stacking errors or equipment interference caused by inaccurate positioning. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the stacking mechanism of the present invention. Figure 1 .

[0018] Figure 3 for Figure 2 A schematic diagram of the partial structure at point A in the middle.

[0019] Figure 4 This is a schematic diagram of the stacking mechanism of the present invention. Figure 2 .

[0020] Figure 5 for Figure 4 A schematic diagram of the partial structure at point B in the middle.

[0021] Figure 6 This is a schematic diagram of the conveying mechanism structure of the present invention. Figure 1 .

[0022] Figure 7 This is a schematic diagram of the conveying mechanism structure of the present invention. Figure 2 .

[0023] Figure 8This is a schematic diagram of the conveying mechanism structure of the present invention. Figure 3 .

[0024] Figure 9 This is a schematic diagram of the plate-laying mechanism of the present invention. Figure 1 .

[0025] Figure 10 This is a schematic diagram of the plate-laying mechanism of the present invention. Figure 2 .

[0026] Figure 11 This is a schematic diagram of the plate-laying mechanism of the present invention. Figure 3 .

[0027] Figure 12 This is a schematic diagram of the plate-laying mechanism of the present invention. Figure 4 .

[0028] Figure 13 This is a schematic diagram of the plate-laying mechanism of the present invention. Figure 5 .

[0029] Reference numerals: 101-Base plate; 102-Guide rail; 103-Pop-up block; 104-Active rack; 105-Traveling rack; 106-Inner push bar; 107-Inner push rod; 108-Extending rack; 109-Return spring; 110-Automatic warehouse; 201-Moving frame; 202-Lifting cylinder; 203-Lifting plate; 204-Conveyor belt; 205-Moving motor; 206-Moving gear; 207-Active slider; 208-Active lifting rod; 209-Base block; 210-Toothed block; 211-Transmission wheel; 212-Transmission belt; 213-Passive toothed block; 214-Passive lifting rod; 215-Front block; 216-Conveyor motor; 217-Conveyor... 218 - Feeding wheel; 301 - Feeding plate frame; 302 - Extension frame; 303 - Opening and closing plate; 304 - Width measuring plate; 305 - Horizontal spring; 306 - Push frame; 307 - Long push plate; 308 - Push plate spring; 309 - Push plate; 310 - Push plate convex ball; 311 - Threaded rod; 312 - Extension frame; 313 - Rotating gear; 314 - Connecting gear; 315 - Push plate motor; 316 - Bottom shaft; 317 - Intermediate gear; 318 - Internal connecting gear; 319 - Opening and closing rack; 320 - External connecting gear; 321 - Push gear; 322 - Internal convex ball; 323 - External threaded column; 324 - Push plate; 325 - Connecting block; 326 - Protruding block. Detailed Implementation

[0030] The technical solution of the present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0031] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0032] Example: Figures 1-13 As shown, a stacking device for processing polyethylene sheets includes a stacking mechanism for stacking polyethylene sheets. The stacking mechanism includes a base plate 101, and is provided with a plate placement mechanism for placing polyethylene sheets and a conveying mechanism for conveying polyethylene sheets to different positions according to their length and width. The stacking mechanism includes a guide rail 102 fixedly installed on the base plate 101, an automated warehouse 110 fixedly installed on the base plate 101, the automated warehouse 110 is composed of multiple layers and multiple rows of space, an active rack 104 is slidably installed on the factory floor, and a traveling rack 105 is fixedly installed on the base plate 101.

[0033] like Figures 2-5 As shown, the stacking mechanism also includes multiple inner push rods 107 slidably installed at the bottom of the automated warehouse 110. Inner push bars 106 and protruding racks 108 are fixedly installed on the inner push rods 107. An electromagnet is provided on the protruding rack 108. A return spring 109 is provided between the inner push bar 106 and the base plate 101. An inclined surface is provided on the inner push bar 106. An inclined surface is provided on the active rack 104. In the initial state, the inclined surface of the active rack 104 is in contact with the inclined surface of the inner push bar 106 closest to the active rack 104.

[0034] like Figures 2-5 As shown, multiple pop-out blocks 103 are slidably installed inside the guide rail 102. Each pop-out block 103 has two inclined surfaces, and a spring is provided between the pop-out block 103 and the guide rail 102.

[0035] As the drive rack 104 slides along the factory floor, it pushes the inner push bar 106, inner push rod 107, and extension rack 108 relative to the automated warehouse 110 via the inclined plane. The return spring 109 is compressed, aligning the extension rack 108 with the traveling rack 105, allowing the conveyor mechanism to transport materials over longer distances. At this time, the electromagnet on the extension rack 108 attracts the base plate 101, maintaining its position. After the first inner push bar 106 is fully extended, the drive rack 104 continues to slide. When the drive rack 104 contacts the inclined plane of the second inner push bar 106, it pushes the second inner push bar 106, inner push rod 107, and extension rack 108 relative to the automated warehouse 110, causing the second extension rack 108 to be extended along with the previously extended rack 105. 8 and the traveling rack 105 are aligned and repeat in sequence. The further the active rack 104 slides, the more the extended rack 108 extends, and the further the conveying mechanism can move to the farthest part. When the moving frame 201 moves to the front of the designated space of the automated warehouse 110, the slot 218 at the bottom of the moving frame 201 will reach above the pop-up block 103. First, the moving frame 201 presses down the pop-up block 103, and the springs below the pop-up block 103 and the guide rail 102 are compressed. When the slot 218 reaches above the pop-up block 103, the springs between the pop-up block 103 and the base plate 101 rebound to position the moving frame 201. Depending on the length of the polyethylene sheet, the moving frame 201 stops at different columns of the automated warehouse 110, and then is placed on different layers of the automated warehouse 110 depending on the width of the polyethylene sheet.

[0036] like Figures 6-8 As shown, the conveying mechanism includes a movable frame 201 slidably mounted on a guide rail 102, a lifting plate 203 slidably mounted inside the movable frame 201, four conveying wheels 217 rotatably mounted on the lifting plate 203, a conveyor belt 204 wrapped around every two conveying wheels 217, two conveying motors 216 fixedly mounted on the lower surface of the lifting plate 203, the conveying motors 216 drive the conveying wheels 217 to rotate via belt drive, a movable motor 205 fixedly mounted on the movable frame 201, a movable gear 206 rotatably mounted on the movable frame 201, the movable motor 205 drives the movable gear 206 to rotate via belt drive, and the movable gear 206 meshes with a traveling rack 105.

[0037] like Figures 6-8As shown, a lifting electric cylinder 202 is fixedly installed on the moving frame 201, and an active slider 207 is slidably installed inside the moving frame 201. The active slider 207 is fixedly installed with the output end of the lifting electric cylinder 202. Two toothed blocks 210 are fixedly installed on the active slider 207. An active lifting rod 208 is rotatably installed on the active slider 207. A bottom block 209 is fixedly installed on the lower surface of the lifting plate 203. The active lifting rod 208 is rotatably installed with the bottom block 209. Four slots 218 are provided at the bottom of the moving frame 201.

[0038] like Figures 6-8 As shown, a front block 215 is fixedly installed on the lower surface of the lifting plate 203. Four transmission wheels 211 are rotatably installed on the lower surface of the lifting plate 203. A transmission toothed belt 212 is wound around two of the transmission wheels 211. A passive toothed block 213 is slidably installed inside the moving frame 201. The toothed block 210 meshes with the transmission toothed belt 212. The passive toothed block 213 meshes with the transmission toothed belt 212. A passive lifting rod 214 is rotatably installed on the passive toothed block 213. The passive lifting rod 214 is rotatably installed with the front block 215.

[0039] The mobile motor 205 drives the mobile gear 206 to rotate via a transmission belt. The mobile gear 206 meshes with the traveling rack 105, thereby causing the mobile frame 201 to slide along the guide rail 102. After the extending rack 108 extends, the mobile gear 206 continues to mesh with the extending rack 108. When it reaches the designated column of the automated warehouse 110, the extension distance of the lifting cylinder 202 is controlled according to the different widths of the polyethylene sheets. The extension of the lifting cylinder 202 causes the active slider 207 and the toothed block 210 to slide along the mobile frame 201, thereby causing the active lifting rod 208 to rotate. The active lifting rod 208 causes the bottom block 209 and the lifting plate 203 to rise, while the toothed block 208 rotates. The block 210 drives the transmission toothed belt 212 to rotate, and the transmission toothed belt 212 drives the passive toothed block 213 to slide along the moving frame 201, thereby driving the passive lifting rod 214 to rotate. The passive lifting rod 214 drives the front block 215 and the lifting plate 203 to rise synchronously, so that the lifting plate 203 rises to the designated layer of the automated warehouse 110. Then, the robotic arm set in the automated warehouse 110 puts the polyethylene sheet on the lifting plate 203 into the automated warehouse 110. After that, the moving frame 201 returns to the initial position, the electromagnet on the extended rack 108 is de-energized, and the return spring 109 rebounds, so that all the extended racks 108 and inner push bars 106 that have been pushed out are reset.

[0040] like Figures 9-13As shown, the plate feeding mechanism includes a plate feeding frame 301 fixedly mounted on a base plate 101, an extension frame 302 fixedly mounted on the plate feeding frame 301, a pusher motor 315 fixedly mounted below the extension frame 302, a bottom shaft 316 rotatably mounted below the extension frame 302, an intermediate gear 317 fixedly mounted on the bottom shaft 316, the pusher motor 315 drives the bottom shaft 316 to rotate via a transmission belt, two pusher gears 321 rotatably mounted on the extension frame 302, an inner convex ball 322 fixedly mounted inside the pusher gear 321, an external threaded column 323 slidably mounted on the extension frame 302, the inner convex ball 322 sliding in the thread of the external threaded column 323, a pusher plate 324 fixedly mounted on the external threaded column 323, and the bottom shaft 316 drives the pusher gears 321 to rotate via a transmission belt.

[0041] like Figures 9-13 As shown, two width measuring plates 304 are slidably mounted on the plate feeding frame 301. The width measuring plates 304 are provided with inclined surfaces. A horizontal spring 305 is provided between the two width measuring plates 304. A long push plate 307 is slidably mounted on the plate feeding frame 301. A push plate 309 is fixedly mounted on the long push plate 307. A push plate spring 308 is provided between the long push plate 307 and the plate feeding frame 301. An extension frame 312 is fixedly mounted on the plate feeding frame 301. A push plate convex ball 310 is fixedly mounted on the push plate 309. A threaded rod 311 is rotatably mounted on the extension frame 312. The push plate convex ball 310 slides in the thread of the threaded rod 311. A rotating gear 313 is fixedly mounted on the threaded rod 311. A mating gear 314 is rotatably mounted below the extension frame 312. The rotating gear 313 drives the mating gear 314 to rotate through gear transmission. The mating gear 314 meshes with the drive rack 104.

[0042] like Figures 9-13 As shown, two opening and closing plates 303 are slidably mounted on the plate feeding frame 301. A spring is provided between the opening and closing plates 303 and the plate feeding frame 301. An opening and closing rack 319 is fixedly mounted below the opening and closing plates 303. A pusher 306 is slidably mounted on the plate feeding frame 301. A spring is provided between the pusher 306 and the plate feeding frame 301. Two docking blocks 325 are provided on the pusher 306. The docking blocks 325 slide within the plate feeding frame 301. Two protruding blocks 326 are fixedly mounted on the pusher plate 324. An inner docking gear 318 and an outer docking gear 320 are rotatably mounted on the pusher 306. The inner docking gear 318 drives the outer docking gear 320 to rotate through a transmission belt and gear transmission.

[0043] The polyethylene sheet to be stored is placed on the extension rack 302. The pusher motor 315 drives the bottom shaft 316 and the intermediate gear 317 to rotate via belt drive. The bottom shaft 316 drives the push gear 321 to rotate via belt drive. The push gear 321 drives the external threaded column 323 and the push plate 324 to slide inward via the inner convex ball 322. The push plate 324 pushes the polyethylene sheet on the extension rack 302 toward the feeding rack 301. When the polyethylene sheet contacts the inclined surface of the width measuring plate 304, the two width measuring plates 304 are pushed outward, and the horizontal spring 305 is stretched. The width of the polyethylene sheet is determined according to the distance the width measuring plate 304 moves outward. The extension of the lifting cylinder 202 is determined by the width. When the polyethylene sheet contacts the long push plate 307, the polyethylene sheet reaches the opening and closing plate 303, pushing the long push plate 307 and the push plate 309 to slide along the feeding frame 301. The push plate spring 308 is compressed. The push plate 309 drives the threaded rod 311 and the rotating gear 313 to rotate through the push plate convex ball 310. The rotating gear 313 drives the docking gear 314 to rotate through gear transmission. The docking gear 314 drives the active rack 104 to slide. When the push plate 324 moves to contact the feeding frame 301, the protrusion 326 pushes the docking block 325 and the push frame 301. 6. Sliding: At this point, the length measurement is complete, and the sliding of the active rack 104 stops. The extended rack 108, which has already been pushed out, is attracted to the base plate 101 by an electromagnet. The sliding of the pusher 306 drives the inner docking gear 318 to mesh with the intermediate gear 317, and the outer docking gear 320 to mesh with the opening and closing rack 319. The intermediate gear 317 drives the inner docking gear 318 to rotate. The inner docking gear 318 drives the outer docking gear 320 to rotate through belt drive and gear drive, thereby driving the two opening and closing racks 319 and the opening and closing plate 303 to slide outward, so that the polyethylene sheet on the opening and closing plate 303 falls onto the lifting plate 203, and then the pusher... Spring 308 rebounds, causing the long push plate 307, threaded rod 311, and mating gear 314 to reset. However, the extended rack 108, which has already been pushed out, is attracted to the base plate 101 by an electromagnet and will not reset. Horizontal spring 305 rebounds, causing the width measuring plate 304 to reset. At the same time, push plate motor 315 reverses, driving push plate 324 to reset. The spring between push frame 306 and plate feeding frame 301 causes push frame 306 to reset, causing outer mating gear 320 to disengage from opening and closing rack 319, and inner mating gear 318 to disengage from intermediate gear 317. The spring between opening and closing plate 303 and plate feeding frame 301 rebounds, causing opening and closing plate 303 to reset.

[0044] The working principle of the polyethylene sheet stacking device disclosed in this invention is as follows: The polyethylene sheet to be stored is placed on the extension frame 302. The pusher motor 315 drives the bottom shaft 316 and the intermediate gear 317 to rotate via belt drive. The bottom shaft 316 drives the push gear 321 to rotate via belt drive. The push gear 321 drives the external threaded column 323 and the push plate 324 to slide inward via the inner convex ball 322. The push plate 324 pushes the polyethylene sheet on the extension frame 302 towards the feeding frame 301. When the polyethylene sheet contacts the inclined surface of the width measuring plate 304, the two width measuring plates 304 are pushed outward, and the horizontal spring 305 is stretched. The width of the polyethylene sheet is determined based on the outward movement distance of the width measuring plates 304, and the extension amount of the lifting cylinder 202 is determined by the width. When the polyethylene sheet contacts the long push plate 307, the polyethylene sheet reaches the opening and closing plate 303, pushing the long push plate 307 and the push plate 309 to slide along the feeding frame 301. The push spring 308 is stretched. The compression and push plate 309 drives the threaded rod 311 and the rotating gear 313 to rotate via the push plate convex ball 310. The rotating gear 313 drives the docking gear 314 to rotate via gear transmission. The docking gear 314 drives the drive rack 104 to slide. When the push plate 324 moves to contact the plate feeding frame 301, the protrusion 326 pushes the docking block 325 and the push frame 306 to slide. At this time, the length measurement is completed, and the drive rack 104 stops sliding. The extended rack 108 that has been pushed out is now in operation. The pusher 306 is attracted to the base plate 101 by an electromagnet. The pusher 306 slides and drives the inner docking gear 318 to mesh with the middle gear 317, and the outer docking gear 320 to mesh with the opening and closing rack 319. The middle gear 317 drives the inner docking gear 318 to rotate. The inner docking gear 318 drives the outer docking gear 320 to rotate through belt drive and gear drive, thereby driving the two opening and closing racks 319 and the opening and closing plate 303 to slide outward, so that the polyethylene sheet on the opening and closing plate 303 falls onto the lifting plate 203.As the drive rack 104 slides along the factory floor, it pushes the inner push bar 106, inner push rod 107, and extension rack 108 relative to the automated warehouse 110 via the inclined plane. The return spring 109 is compressed, aligning the extension rack 108 with the traveling rack 105, allowing the conveyor mechanism to transport materials over longer distances. At this time, the electromagnet on the extension rack 108 attracts the base plate 101, maintaining its position. After the first inner push bar 106 is fully extended, the drive rack 104 continues to slide. When the drive rack 104 contacts the inclined plane of the second inner push bar 106, it pushes the second inner push bar 106, inner push rod 107, and extension rack 108 relative to the automated warehouse 110, causing the second extension rack 108 to be extended along with the previously extended rack 105. 8 and the walking rack 105 are aligned and repeat in sequence. As the active rack 104 slides further and the extended rack 108 extends further, the conveying mechanism can move to the farthest part. When the moving frame 201 moves to the front of the designated space of the automated warehouse 110, the slot 218 at the bottom of the moving frame 201 will reach the top of the pop-up block 103. First, the moving frame 201 presses down the pop-up block 103, and the springs under the pop-up block 103 and the guide rail 102 are compressed. When the slot 218 reaches the top of the pop-up block 103, the springs between the pop-up block 103 and the base plate 101 rebound to position the moving frame 201. Depending on the length of the polyethylene sheet, the moving frame 201 stops at different columns of the automated warehouse 110, and then is placed on different layers of the automated warehouse 110 depending on the width of the polyethylene sheet.The mobile motor 205 drives the mobile gear 206 to rotate via a transmission belt. The mobile gear 206 meshes with the traveling rack 105, thereby causing the mobile frame 201 to slide along the guide rail 102. After the extending rack 108 extends, the mobile gear 206 continues to mesh with the extending rack 108. When it reaches the designated column of the automated warehouse 110, the extension distance of the lifting cylinder 202 is controlled according to the different widths of the polyethylene sheets. The extension of the lifting cylinder 202 causes the active slider 207 and the toothed block 210 to slide along the mobile frame 201, thereby causing the active lifting rod 208 to rotate. The active lifting rod 208 causes the bottom block 209 and the lifting plate 203 to rise, while the toothed block 208 rotates. The block 210 drives the transmission toothed belt 212 to rotate, and the transmission toothed belt 212 drives the passive toothed block 213 to slide along the moving frame 201, thereby driving the passive lifting rod 214 to rotate. The passive lifting rod 214 drives the front block 215 and the lifting plate 203 to rise synchronously, so that the lifting plate 203 rises to the designated layer of the automated warehouse 110. Then, the robotic arm set in the automated warehouse 110 puts the polyethylene sheet on the lifting plate 203 into the automated warehouse 110. After that, the moving frame 201 returns to the initial position, the electromagnet on the extended rack 108 is de-energized, and the return spring 109 rebounds, so that all the extended racks 108 and inner push bars 106 that have been pushed out are reset. Subsequently, the push plate spring 308 rebounds, causing the long push plate 307, threaded rod 311, and mating gear 314 to reset. However, the extended rack 108, which has already been pushed out, is attracted to the base plate 101 by the electromagnet and will not reset. The horizontal spring 305 rebounds, causing the width measuring plate 304 to reset. At the same time, the push plate motor 315 reverses, driving the push plate 324 to reset. The spring between the push frame 306 and the plate feeding frame 301 causes the push frame 306 to reset, causing the outer mating gear 320 to disengage from the opening and closing rack 319, and the inner mating gear 318 to disengage from the intermediate gear 317. The spring between the opening and closing plate 303 and the plate feeding frame 301 rebounds, causing the opening and closing plate 303 to reset.

[0045] This invention is not limited to the specific embodiments described above. Any modifications made by those skilled in the art based on the above concept without creative effort are within the protection scope of this invention.

Claims

1. A stacking device for processing polyethylene sheets, comprising a stacking mechanism for stacking polyethylene sheets, characterized in that: The stacking mechanism includes a base plate (101), and the stacking mechanism is provided with a plate placement mechanism for placing polyethylene sheets and a conveying mechanism for conveying polyethylene sheets to different positions according to their length and width. The stacking mechanism includes a guide rail (102) fixedly installed on the base plate (101), an automated warehouse (110) fixedly installed on the base plate (101), the automated warehouse (110) is composed of multiple layers and multiple columns of space, an active rack (104) is slidably installed on the factory floor, and a traveling rack (105) is fixedly installed on the base plate (101).

2. The stacking device for processing polyethylene sheets according to claim 1, characterized in that: The stacking mechanism also includes multiple inner push rods (107) slidably installed at the bottom of the automated warehouse (110). Inner push rods (106) and protruding racks (108) are fixedly installed on the inner push rods (107). Electromagnets are provided on the protruding racks (108). A return spring (109) is provided between the inner push rods (106) and the base plate (101). An inclined surface is provided on the inner push rods (106). An inclined surface is provided on the active racks (104). In the initial state, the inclined surface of the active racks (104) is in contact with the inclined surface of the inner push rods (106) closest to the active racks (104).

3. The stacking device for processing polyethylene sheets according to claim 2, characterized in that: Multiple pop-out blocks (103) are slidably installed inside the guide rail (102). Two inclined surfaces are provided on the pop-out blocks (103), and a spring is provided between the pop-out blocks (103) and the guide rail (102).

4. The stacking device for processing polyethylene sheets according to claim 1, characterized in that: The conveying mechanism includes a movable frame (201) slidably mounted on a guide rail (102), a lifting plate (203) slidably mounted inside the movable frame (201), four conveyor wheels (217) rotatably mounted on the lifting plate (203), a conveyor belt (204) wrapped around each pair of conveyor wheels (217), two conveyor motors (216) fixedly mounted on the lower surface of the lifting plate (203), the conveyor motors (216) drive the conveyor wheels (217) to rotate via belt drive, a movable motor (205) fixedly mounted on the movable frame (201), a movable gear (206) rotatably mounted on the movable frame (201), the movable motor (205) drives the movable gear (206) to rotate via belt drive, and the movable gear (206) meshes with the traveling rack (105).

5. A stacking device for processing polyethylene sheets according to claim 4, characterized in that: A lifting electric cylinder (202) is fixedly installed on the movable frame (201). An active slider (207) is slidably installed inside the movable frame (201). The active slider (207) is fixedly installed with the output end of the lifting electric cylinder (202). Two toothed blocks (210) are fixedly installed on the active slider (207). An active lifting rod (208) is rotatably installed on the active slider (207). A bottom block (209) is fixedly installed on the lower surface of the lifting plate (203). The active lifting rod (208) is rotatably installed with the bottom block (209). Four slots (218) are provided at the bottom of the movable frame (201).

6. A stacking device for processing polyethylene sheets according to claim 5, characterized in that: The lower surface of the lifting plate (203) is fixedly mounted with a front block (215), and four transmission wheels (211) are rotatably mounted on the lower surface of the lifting plate (203). Two transmission wheels (211) are wrapped with transmission toothed belts (212). A passive toothed block (213) is slidably mounted inside the moving frame (201). The toothed block (210) meshes with the transmission toothed belt (212), and the passive toothed block (213) meshes with the transmission toothed belt (212). A passive lifting rod (214) is rotatably mounted on the passive toothed block (213), and the passive lifting rod (214) is rotatably mounted with the front block (215).

7. A stacking device for processing polyethylene sheets according to claim 1, characterized in that: The plate feeding mechanism includes a plate feeding frame (301) fixedly installed on a base plate (101), an extension frame (302) fixedly installed on the plate feeding frame (301), a push plate motor (315) fixedly installed below the extension frame (302), a bottom shaft (316) rotatably installed below the extension frame (302), an intermediate gear (317) fixedly installed on the bottom shaft (316), the push plate motor (315) drives the bottom shaft (316) to rotate via a transmission belt, two push gears (321) rotatably installed on the extension frame (302), an inner convex ball (322) fixedly installed inside the push gear (321), an external threaded column (323) slidably installed on the extension frame (302), the inner convex ball (322) slides in the thread of the external threaded column (323), a push plate (324) fixedly installed on the external threaded column (323), and the bottom shaft (316) drives the push gears (321) to rotate via a transmission belt.

8. A stacking device for processing polyethylene sheets according to claim 7, characterized in that: Two width measuring plates (304) are slidably mounted on the plate feeding frame (301). An inclined surface is provided on each width measuring plate (304). A horizontal spring (305) is provided between the two width measuring plates (304). A long push plate (307) is slidably mounted on the plate feeding frame (301). A push plate (309) is fixedly mounted on the long push plate (307). A push plate spring (308) is provided between the long push plate (307) and the plate feeding frame (301). An extension frame (312) is fixedly mounted on the plate feeding frame (301). A push plate protrusion ball (310) is fixedly installed on the plate (309), and a threaded rod (311) is rotatably installed on the extension frame (312). The push plate protrusion ball (310) slides in the thread of the threaded rod (311). A rotating gear (313) is fixedly installed on the threaded rod (311), and a mating gear (314) is rotatably installed below the extension frame (312). The rotating gear (313) drives the mating gear (314) to rotate through gear transmission, and the mating gear (314) meshes with the drive rack (104).

9. A stacking device for processing polyethylene sheets according to claim 8, characterized in that: Two opening and closing plates (303) are slidably installed on the plate feeding frame (301). A spring is provided between the opening and closing plates (303) and the plate feeding frame (301). An opening and closing rack (319) is fixedly installed below the opening and closing plates (303). A push frame (306) is slidably installed on the plate feeding frame (301). A spring is provided between the push frame (306) and the plate feeding frame (301). Two docking blocks (325) are provided on the push frame (306). The docking blocks (325) slide inside the plate feeding frame (301). Two protruding blocks (326) are fixedly installed on the push plate (324). An inner docking gear (318) and an outer docking gear (320) are rotatably installed on the push frame (306). The inner docking gear (318) drives the outer docking gear (320) to rotate through a transmission belt and gear transmission.

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