Automatic transfer of a stack of paper onto a pallet and method of use thereof

Abstract

The application provides a paper stack automatic transfer upper tray device and a use method thereof, which comprises a conveying mechanism, a tray separating mechanism, a translation mechanism and a supporting mechanism arranged in sequence along the advancing direction of the conveying mechanism; the tray separating mechanism is transversely arranged on the conveying mechanism and is internally provided with a liftable lifting frame; the lifting frame is provided with two relatively movable supporting arms; an L-shaped plate is fixedly arranged on the inner side of the supporting arm and is used for separating the stacked trays layer by layer into single trays for continuous conveying; the translation mechanism and the supporting mechanism are separately arranged on the two sides of the conveying mechanism; the translation mechanism is provided with a translatable belt conveyor and can be moved to the upper side of the tray; and the supporting mechanism is provided with a retractable supporting frame and is used for abutting against the side end surface of the paper stack. The device can automatically complete the tray separating and feeding and the paper stack upper tray operation, the supporting frame is limited and prevented from tilting during the transfer process, the operation is stable and reliable, and the upper tray operation efficiency and the finished product quality are effectively improved.

Description

Technical Field

[0001] This invention relates to the field of automatic conveying technology, specifically to an automatic paper stack transfer device for palletizing and its usage method. Background Technology

[0002] In the downstream production processes of the paper product processing, printing, and packaging industries, stacked paper pallets need to be transferred to standard logistics pallets to meet the logistics requirements of subsequent warehousing and inter-plant transfer. The palletizing process includes two core steps: empty pallet distribution and paper pallet transfer. The level of automation and operational stability of this process directly determines the production efficiency and finished product quality of the entire production line.

[0003] In existing production scenarios, empty pallets are usually transported to the loading station in a multi-layered stacked state. The pallet sorting operation is mostly done manually, which is labor-intensive, has low supply efficiency, and is difficult to match the operating rhythm of high-speed production lines. Some automated pallet sorting equipment is prone to pallet jamming and multi-layer pallet conveying failures due to the simple lifting mechanism and guide structure and insufficient pallet clamping and positioning accuracy. It cannot achieve continuous and stable automatic supply of single pallets.

[0004] For the transfer of paper stacks to pallets, existing technologies mostly adopt robotic arm gripping or horizontal pushing solutions: robotic arm gripping solutions have high equipment purchase and maintenance costs, occupy a large space, and have strict requirements for paper stacking accuracy, resulting in poor adaptability to different scenarios; horizontal pushing solutions are limited by the height difference between the paper stack conveying surface and the top surface of the pallet, and the paper stack lacks lateral restraint on the unloading side during the transfer process, making it easy for the paper stack to tilt and scatter when it is placed on the pallet. This not only easily causes damage to the edges and corners of the paper products, but also requires manual re-sorting and stacking, which greatly reduces the overall operation efficiency and the finished product qualification rate. Summary of the Invention

[0005] The main objective of this invention is to provide an automatic paper stack transfer device for palletizing and its usage method, thereby solving the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: multiple pallets are stacked and conveyed on a conveying mechanism, and a pallet separating mechanism, a translation mechanism and a top support mechanism are arranged sequentially along the forward direction of the conveying mechanism. The pallet separating mechanism spans across the conveying mechanism and is used to separate the stacked multiple pallets into individual pallets for conveying in sequence. The translation mechanism and the top support mechanism are arranged opposite each other on both sides of the conveying mechanism. A single pallet moves between the translation mechanism and the top support mechanism through the conveying mechanism. The translation mechanism transfers the paper stack onto the pallet, while the top support mechanism is used to abut against one side of the paper stack to assist in its transfer.

[0007] Preferably, the supports in the pallet separating mechanism are located on both sides of the conveying mechanism, and a lifting frame is provided between the supports. Two relatively movable support arms are provided on one side of the lifting frame, and multiple L-plates are fixed on the inner side of the two support arms. The L-shaped pallet abuts against the bottom of the pallet, lifting the upper pallet and separating the bottom pallet so it can move on the conveyor mechanism.

[0008] Preferably, a crossbeam is fixed between the tops of the supports on both sides of the conveying mechanism, and a rotating drive shaft is provided inside the crossbeam. The two ends of the drive shaft are connected to the sprockets on the sprocket seats at the bottom of the supports through sprockets and chains. The two ends of the chain are fixed to the lifting frame. The drive shaft rotates, which in turn pulls the lifting frame up and down via a chain.

[0009] Preferably, a guide rail is fixed to the inner wall of the support, and the two sides of the end of the lifting frame slide against the guide rail through a roller assembly; A motor is fixed to the top of the crossbeam, and the output shaft of the motor is connected to the transmission shaft through a transmission mechanism.

[0010] Preferably, a plurality of first guide columns are fixed on one side of the lifting frame, and sliding second sliding frames are sleeved at both ends of the first guide columns. The end of the support arm is fixed on the second sliding frame, and a first pushing mechanism is provided between the second sliding frame and the lifting frame. The first pushing mechanism is used to drive the second sliding frame to move. Multiple baffles are fixed in the middle of the lifting frame. The pallet is conveyed into the pallet separating mechanism by the conveying mechanism, and its end face abuts against the baffles.

[0011] Preferably, the belt conveyor in the translation mechanism has a base at its bottom, and the belt conveyor slides against the base through a sliding support assembly, with its end sliding above the tray; The support frame in the top support mechanism is equipped with a sliding top support at its end, which is used to abut against one side of the paper stack on the belt conveyor; The bottom of the belt conveyor and the top bracket are both higher than the top of the pallet so that the belt conveyor and the top bracket can move above the pallet.

[0012] Preferably, a first sliding frame is fixedly installed at the bottom rear of the belt conveyor, and slide rails are fixedly installed on both sides of the base. The bottom sides of the first sliding frame are connected to the slide rails through multiple sliders. A rack is fixed in the middle of the base, and a gear driven by a motor is provided at the bottom of the first sliding frame. The gear is engaged with the rack. Multiple pulleys are fixedly installed on both sides of the bottom front of the belt conveyor, and first support bars are fixedly installed on both sides of the base. The pulleys roll against the first support bars. A second support bar, flush with the first support bar, is fixed inside the conveying mechanism. A pulley at the bottom of the belt conveyor crosses the conveying mechanism and rolls against the second support bar. The pallet is located between the two second support bars.

[0013] Preferably, a fixed frame is fixed at the end of the support frame, and the middle part of the top support frame is connected to the fixed frame through a second pushing mechanism. The cylinder of the second pushing mechanism is fixed on the fixed frame, and the end of the pushing rod is fixed on the top support frame. Multiple second guide posts are fixed around the top bracket, and a sliding sleeve is fixed at the corresponding position on the fixed frame. The second guide posts move against the sliding sleeve.

[0014] Preferably, multiple legs are fixed to the bottom of both sides of the panel in the tray, and a groove is provided on the top of the panel corresponding to the legs, so that the legs abut against the grooves when multiple trays are stacked. The L-shaped plate on the support arm rests against both sides of the panel, thereby lifting the pallet and separating the legs of the upper pallet from the groove of the bottom pallet.

[0015] The method of using the automatic transfer device for paper stacks onto pallets is characterized by the following steps: S1. The stacked pallets are conveyed to the pallet separating mechanism on the conveying mechanism and abut against the upper limit of the baffle. The first pushing mechanism synchronously drives the support arms on both sides and the L-plate to lock onto both sides of the second to last pallet. Then, the motor drives the lifting frame to lift all the pallets except the bottom pallet as a whole, thereby separating the bottom pallet and moving it between the translation mechanism and the top support mechanism. S2. The belt conveyor in the translation mechanism is driven by a servo motor to move the end of the belt conveyor to the top of the pallet, and then the stacked paper stacks on top of it are moved to the end by the belt conveyor. At the same time, the second pushing mechanism in the top support mechanism drives the top support frame to abut against the end face of the paper stack. S3. Simultaneously, the paper stack is moved to the end by the belt conveyor and the belt conveyor is moved backward by the servo motor, so that the end face of the paper stack is pressed against the top bracket and transferred to the pallet. Then, the pallet and paper stack are transported to the next process by the conveying mechanism. S4. Repeat steps S1 to S3 to sequentially separate and move multiple pallets between the translation mechanism and the top support mechanism, and transfer the paper stacks to each pallet for transport to the next process.

[0016] This invention provides an automatic paper stack transfer device for palletizing and its usage method, with the following advantages: 1. By using a liftable lifting frame with relatively openable support arms and an L-shaped pallet structure, and with the baffle for precise positioning, stacked pallets can be automatically separated layer by layer, enabling continuous conveying of single pallets along the conveyor mechanism; supplemented by a lifting and guiding structure with guide rail rollers, the pallet separation lifting action is smooth and the alignment is precise, effectively avoiding pallet jamming and stacking errors, eliminating the need for manual pallet separation operation, and greatly improving pallet supply efficiency and equipment operation stability.

[0017] 2. A coordinated transfer scheme is adopted, which involves the overall horizontal movement and retraction of the belt conveyor, synchronous unloading of the belt, and limit positioning of the top support frame end face. During the transfer of the paper stack, the top support frame is in close contact with the side end face of the paper stack throughout the process, effectively offsetting the risk of tipping and scattering caused by unloading inertia and height difference. The horizontal movement mechanism adopts a double-support walking structure with a rear slide rail slider and a front pulley support bar, which ensures smooth movement and precise stroke across the conveyor mechanism, ensuring that the paper stack is placed flat on the pallet and the finished product qualification rate is high.

[0018] 3. The entire process of pallet separation, pallet conveying, and paper stack loading is fully automated and continuous, with a high degree of process cycle matching, enabling continuous batch operations; no manual intervention is required for pallet separation and stacking operations, significantly reducing labor intensity and labor costs, while avoiding safety hazards during manual paper stack handling and pallet separation, resulting in a significant improvement in overall production efficiency. Attached Figure Description

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is an isometric view of the overall structure of the present invention; Figure 2 This is the present invention. Figure 1 Top view; Figure 3 This is an axonometric view of the tray separating mechanism of the present invention; Figure 4 This is the present invention. Figure 3 Another axonometric view; Figure 5 This is the present invention. Figure 3 The front view; Figure 6 This is an isometric view of the translation mechanism of the present invention; Figure 7 This is the present invention. Figure 6 Top view; Figure 8 This is an axonometric view of the top support mechanism of the present invention; Figure 9 This is the present invention. Figure 8 The front view; Figure 10 This is the present invention. Figure 9 Sectional view of AA; Figure 11 This is a side view of the tray of the present invention; In the diagram: Conveying mechanism 1; Translation mechanism 2; Belt conveyor 201; First sliding frame 202; Pulley 203; First support bar 204; Second support bar 205; Slide rail 206; Rack 207; Base 208; Pallet separating mechanism 3; Support 301; Crossbeam 302; Drive shaft 303; Motor 304; Sprocket seat 305; Lifting frame 306; First guide column 307; Second sliding frame 308; First pushing mechanism 309; Support arm 310; L-plate 311; Guide rail 312; Roller assembly 313; Chain 314; Baffle 315; Top support mechanism 4; Support frame 401; Top support frame 402; Second guide column 403; Pushing mechanism 404; Fixed frame 405; Pallet 5; Groove 501; Support leg 502; Panel 503. Detailed Implementation

[0020] Example 1 like Figures 1-11 As shown, the automatic pallet transfer device for paper stacks includes multiple pallets 5 stacked and conveyed on a conveying mechanism 1. A pallet separating mechanism 3, a translation mechanism 2, and a top support mechanism 4 are arranged sequentially along the forward direction of the conveying mechanism 1. The pallet separating mechanism 3 spans across the conveying mechanism 1 and is used to separate the multiple stacked pallets 5 into individual pallets 5 for conveying. The translation mechanism 2 and the top support mechanism 4 are arranged opposite each other on both sides of the conveying mechanism 1. A single pallet 5 moves between the translation mechanism 2 and the top support mechanism 4 through the conveying mechanism 1. The translation mechanism 2 transfers the paper stack onto the pallet 5. The top support mechanism 4 is used to abut against one side of the paper stack to assist its transfer.

[0021] The support 301 in the pallet separating mechanism 3 is located on both sides of the conveying mechanism 1. A lifting frame 306 is provided between the support 301. Two relatively movable support arms 310 are provided on one side of the lifting frame 306. Multiple L-plates 311 are fixed on the inner side of the two support arms 310. L-plate 311 abuts against the bottom of pallet 5 to lift the upper pallet 5, separating the bottom pallet 5 so that it can move on the conveyor mechanism 1.

[0022] Multiple pallets 5 are stacked on the conveyor mechanism 1 and transported to the pallet separating mechanism 3. The two relatively moving support arms 310 cause multiple L-shaped pallets 311 to abut against both sides of the upper pallet 5. Then, the lifting frame 306 drives the whole structure to be lifted, which can separate the upper pallet 5 from the bottom pallet 5. The bottom pallet 5 remains on the conveyor mechanism 1 and continues to be transported to the next process. The lifting is repeated to separate the stacked pallets 5 on the conveyor mechanism 1 in turn, realizing the function of automatic continuous transport of multiple stacked pallets 5.

[0023] like Figures 3-5As shown, a crossbeam 302 is fixed between the tops of the supports 301 on both sides of the conveying mechanism 1. A rotating drive shaft 303 is installed inside the crossbeam 302. The drive shaft 303 is mounted inside the crossbeam 302 through a bearing seat and rotates. The two ends of the drive shaft 303 are connected to the sprockets on the sprocket seats 305 at the bottom of the support 301 through sprockets and chains 314. One side of the chain 314 is open and both ends are fixed on the lifting frame 306. When the drive shaft 303 rotates, the lifting frame 306 can be raised or lowered by pulling the chain 314.

[0024] A motor 304 is mounted on the top of the crossbeam 302. The motor 304 is connected to the drive shaft 303 through a transmission mechanism, which drives the drive shaft 303 to rotate, thereby causing the chain 314 to pull the lifting frame 306 to rise and fall. More preferably, the transmission mechanism consists of a sprocket and a chain, with the sprocket fixed to the output shaft of the motor 304 and the end of the drive shaft 303, respectively.

[0025] To ensure the smooth lifting of the lifting frame 306, guide rails 312 are installed on the inner walls of the supports 301 on both sides. The two ends of the lifting frame 306 slide against the guide rails 312 through roller sets 313. In this example, the roller set 313 consists of two side rollers that are locked on both sides of the guide rail 312 and one front roller that abuts against the end face of the guide rail 312, so that the lifting frame 306 can be lifted vertically along the guide rail 312, making the lifting more stable and reliable.

[0026] Preferably, a plurality of first guide posts 307 are fixed on one side of the lifting frame 306, and a sliding second sliding frame 308 is sleeved at both ends of the first guide posts 307. The end of the support arm 310 is fixed on the second sliding frame 308. A first pushing mechanism 309 is provided between the second sliding frame 308 and the lifting frame 306. The first pushing mechanism 309 is used to drive the second sliding frame 308 to move.

[0027] In this example, a first guide post 307 is fixed at both the top and bottom of the lifting frame 306 near the tray 5. Both ends of the first guide post 307 are fixed to the lifting frame 306, and the end of the support arm 310 slides on the two first guide posts 307 via a sliding sleeve. The middle of the second sliding frame 308 is connected to the lifting frame 306 via a first pushing mechanism 309. This allows the second sliding frame 308 and the support arm 310 to move horizontally through the pushing action of the first pushing mechanism 309, causing the support arm 310 of the lifting frame 306 to move relative to each other. This allows the L-plate 311 to abut against both sides of the tray 5, clamping, fixing, and lifting it. In this example, the first pushing mechanism 309 is a cylinder.

[0028] Preferably, a plurality of baffles 315 are fixed in the middle of the lifting frame 306, and the pallet 5 is conveyed into the pallet separating mechanism 3 by the conveying mechanism 1, with its end face abutting against the baffles 315.

[0029] Multiple stacked pallets 5 are conveyed on the conveying mechanism 1 and abut against the upper limit of the baffle 315. The pallets 5 are then lifted by the drive arm 310 and the L-plate 311, separating the bottom pallet 5 and conveying it through the pallet separating mechanism 3 to the next process.

[0030] like Figure 11 As shown, multiple legs 202 are fixedly provided on the bottom of both sides of the panel 203 in the tray 5, and a groove 201 is provided on the upper part of the panel 203 corresponding to the legs 202. When multiple trays 5 are stacked, the legs 202 abut against the groove 201. The L-plate 311 on the support arm 310 abuts against both sides of the panel 203, thereby lifting the tray 5 and separating the support legs 202 of the upper tray 5 from the groove 201 of the bottom tray 5.

[0031] Initially, multiple pallets 5 are stacked on the conveyor mechanism 1 and move to the pallet separating mechanism 3, where they are clamped and lifted by the support arm 310 and L-plate 311. This lifts up all the upper pallets 5 except for the bottom pallet 5, thus separating the bottom pallet 5. The bottom pallet 5 can then be conveyed by the conveyor mechanism 1 to the next process. By repeating the above method, multiple stacked pallets 5 can be separated one by one and enter the next process.

[0032] The belt conveyor 201 in the translation mechanism 2 is provided with a base 208 at its bottom. The belt conveyor 201 slides against the base 208 through a sliding support assembly, and its end can slide above the tray 5. The support frame 401 in the top support mechanism 4 is provided with a sliding top support 402 at its end, which is used to abut against one side of the paper stack on the belt conveyor 201.

[0033] The translation mechanism 2 and the top support mechanism 4 are distributed on both sides of the conveying mechanism 1. There are stacked paper stacks on the belt conveyor 201. The pallet 5 is moved between the translation mechanism 2 and the top support mechanism 4 through the conveying mechanism 1. The belt conveyor 201 and the paper stack are driven to move horizontally above the pallet 5 through the sliding support assembly. The top support frame 402 pushes out and abuts against one side of the paper stack. At this time, the belt conveyor 201 is controlled to unload the material. At the same time, the belt conveyor 201 is driven to move backward as a whole, so that the paper stack on the belt conveyor 201 can be transferred to the pallet 5. During the transfer, the height difference of the paper stack changes. The top support frame 402 is close to the paper stack during the transfer to avoid the risk of it tipping over.

[0034] like Figures 6-7As shown, a first sliding frame 202 is fixedly installed at the bottom rear of the belt conveyor 201, and slide rails 206 are fixedly installed on both sides of the base 208. The bottom sides of the first sliding frame 202 are connected to the slide rails 206 through multiple sliders. A rack 207 is fixedly installed in the middle of the base 208, and a gear driven by a motor is provided at the bottom of the first sliding frame 202. The gear is locked on the rack 207.

[0035] A first sliding frame 202 is installed only at the rear bottom of the belt conveyor 201. The first sliding frame 202 is connected to the slide rails 206 on both sides of the base 208 through multiple sliders. The front bottom of the belt conveyor 201 is supported by multiple pulleys 203 against the first support bars 204 on both sides of the base 208. At the same time, a second support bar 205 flush with the first support bar 204 is installed in the conveying mechanism 1 so that the pulleys 203 at the bottom of the belt conveyor 201 cross the conveying mechanism 1 and roll against the second support bar 205. The rear of the belt conveyor 201 slides via a slider and a slide rail 206, while the front slides against the first support bar 204 and the second support bar 205 via pulleys 203, ensuring overall stability. The pallet 5 is located between the two second support bars 205, allowing the front of the belt conveyor 201 to move above the pallet 5, thus smoothly transferring the paper stack onto the pallet 5.

[0036] A rack 207 is installed in the middle of the base 208. A gear driven by a servo motor is installed at the corresponding position at the bottom of the first sliding frame 202. The servo motor drives the gear to rotate against the rack 207, thereby driving the belt conveyor 201 to move as a whole. Proximity switches are installed on the base 208 at the original position and the extreme position of the belt conveyor 201 to provide signals for controlling the servo motor.

[0037] like Figures 8-10 As shown, a fixed frame 405 is fixedly provided at the end of the support frame 401, and the middle part of the top support frame 402 is connected to the fixed frame 405 through the second pushing mechanism 404. The cylinder of the second pushing mechanism 404 is fixed on the fixed frame 405, and the end of the pushing rod is fixed on the top support frame 402.

[0038] In this example, the second pushing mechanism 404 is a cylinder. The second pushing mechanism 404 drives the top support 402 to move above the pallet 5. When the belt conveyor 201 is unloading, the top support 402 can abut against the paper stack to ensure the stability of the paper stack during transfer.

[0039] Preferably, a plurality of second guide posts 403 are fixedly mounted around the top support 402, and a sliding sleeve is fixedly mounted at a corresponding position on the fixed frame 405. The second guide posts 403 move against the sliding sleeve. The top support 402 moves smoothly by moving against the sliding sleeve on the fixed frame 405 via the second guide posts 403, ensuring more reliable support. In this example, the top support 402 is H-shaped, which can fit tightly against one end face of the stack, preventing it from tilting.

[0040] Preferably, the bottoms of both the belt conveyor 201 and the top support 402 are higher than the top of the pallet 5, so that the belt conveyor 201 and the top support 402 can move above the pallet 5. To minimize the risk of tipping caused by the height difference during paper stack transfer, the bottoms of both the belt conveyor 201 and the top support 402 are slightly higher than the top of the pallet 5. During the paper stack transfer process, the top support 402 is fully supported against the unloading tilt side to prevent the paper stack from collapsing due to unloading tilt.

[0041] Working principle: The paper stack moves on the belt conveyor 201. The pallet 5 is moved between the translation mechanism 2 and the top support mechanism 4 via the conveying mechanism 1. The belt conveyor 201 is moved forward onto the pallet 5 by the servo motor. According to the width of the paper stack, the end of the belt conveyor 201 is moved to the outermost position where the paper stack is centered on the pallet 5. At the same time, the second pushing mechanism 404 pushes the top support 402 to the end of the belt conveyor 201, leaving a gap between them. Then, the belt of the belt conveyor 201 moves the paper stack to the end of the belt conveyor 201 and makes the paper stack abut against the top support 402. At this time, the servo motor is driven to control the belt conveyor 201 to move backward as a whole. The belt of the belt conveyor 201 moves synchronously until the paper stack is completely transferred to the pallet 5. At this time, the belt conveyor 201 also exits the conveying mechanism 1, and the top support 402 can be controlled to retract, completing the transfer of the paper stack from the belt conveyor 201 to the pallet 5. Subsequently, the pallet 5 and the paper stack are moved to the next process by the conveying mechanism 1.

[0042] Example 2 like Figures 1-11 As shown in Example 1, the method of using the automatic paper stack transfer device on a pallet is further explained, characterized by the following steps: S1. The stacked pallets 5 are conveyed on the conveying mechanism 1 to the pallet separating mechanism 3, and abut against the upper limit of the baffle 315. The first pushing mechanism 309 synchronously drives the two side arms 310 and L-plate 311 to lock the two sides of the second to last pallet 5. Then, the motor 304 drives the lifting frame 306 to lift all the pallets 5 except the bottom pallet 5 as a whole, thereby separating the bottom pallet 5 and continuing to move it between the translation mechanism 2 and the top support mechanism 4 on the conveying mechanism 1. S2. The belt conveyor 201 in the translation mechanism 2 is driven by a servo motor to move the end of the belt conveyor 201 to the top of the tray 5, and then the stacked paper stacks on top of it are moved to the end by the belt conveyor 201. At the same time, the second pushing mechanism 404 in the top support mechanism 4 drives the top support frame 402 to abut against the end face of the paper stack. S3. Simultaneously, the paper stack is moved to the end by the belt conveyor 201 and the belt conveyor 201 is moved backward as a whole by the servo motor, so that the end face of the paper stack is pressed against the top bracket 402 and transferred to the pallet 5. Then, the pallet 5 and the paper stack are transported to the next process by the conveying mechanism 1. S4. Repeat steps S1 to S3 to sequentially separate and move multiple pallets 5 between the translation mechanism 2 and the top support mechanism 4, and transfer the paper stack to each pallet 5 for transport to the next process.

[0043] The above embodiments are merely preferred technical solutions of the present invention and should not be considered as limitations on the present invention. The scope of protection of the present invention should be limited to the technical solutions described in the claims, including equivalent substitutions of the technical features described in the claims. That is, equivalent substitutions and improvements within this scope are also within the scope of protection of the present invention.

Claims

1. An automatic pallet transfer device for paper stacks, characterized in that: The system includes multiple pallets (5) stacked and conveyed on a conveying mechanism (1). Along the forward direction of the conveying mechanism (1), there are a pallet splitting mechanism (3), a translation mechanism (2), and a top support mechanism (4). The pallet splitting mechanism (3) spans across the conveying mechanism (1) and is used to separate the stacked multiple pallets (5) into individual pallets (5) for conveying. The translation mechanism (2) and the top support mechanism (4) are arranged opposite to each other on both sides of the conveying mechanism (1). A single pallet (5) moves between the translation mechanism (2) and the top support mechanism (4) through the conveying mechanism (1). The paper stack is transferred to the pallet (5) through the translation mechanism (2). The top support mechanism (4) is used to abut against one side of the paper stack to assist its transfer.

2. The automatic pallet transfer device for paper stacks according to claim 1, characterized in that: The support (301) in the pallet splitting mechanism (3) is located on both sides of the conveying mechanism (1). A lifting frame (306) is provided between the support (301). Two relatively movable support arms (310) are provided on one side of the lifting frame (306). Multiple L-plates (311) are fixed on the inner side of the two support arms (310). The L-plate (311) abuts against the bottom of the pallet (5) to lift the upper pallet (5) and separate the bottom pallet (5) so that it can move on the conveyor mechanism (1).

3. The automatic pallet transfer device for paper stacks according to claim 2, characterized in that: A crossbeam (302) is fixed between the top of the supports (301) on both sides of the conveying mechanism (1). A rotating drive shaft (303) is provided inside the crossbeam (302). The two ends of the drive shaft (303) are connected to the sprockets on the sprocket seats (305) at the bottom of the support (301) through sprockets and chains (314). The two ends of the chain (314) with one side open are fixed on the lifting frame (306). The drive shaft (303) can rotate to pull the lifting frame (306) up and down via the chain (314).

4. The automatic pallet transfer device for paper stacks according to claim 3, characterized in that: The inner wall of the support (301) is fixed with a guide rail (312), and the two sides of the end of the lifting frame (306) slide against the guide rail (312) through the roller assembly (313); A motor (304) is fixedly mounted on the top of the crossbeam (302), and the output shaft of the motor (304) is connected to the transmission shaft (303) through a transmission mechanism.

5. The automatic pallet transfer device for paper stacks according to claim 2, characterized in that: A plurality of first guide columns (307) are fixed on one side of the lifting frame (306), and sliding second sliding frames (308) are sleeved at both ends of the first guide columns (307). The end of the support arm (310) is fixed on the second sliding frame (308). A first pushing mechanism (309) is provided between the second sliding frame (308) and the lifting frame (306). The first pushing mechanism (309) is used to drive the second sliding frame (308) to move. Multiple baffles (315) are fixed in the middle of the lifting frame (306). The pallet (5) is conveyed into the pallet splitting mechanism (3) through the conveying mechanism (1), and its end face abuts against the baffle (315).

6. The automatic pallet transfer device for paper stacks according to claim 1, characterized in that: The belt conveyor (201) in the translation mechanism (2) has a base (208) at its bottom. The belt conveyor (201) slides against the base (208) through a sliding support assembly, and its end can slide above the tray (5). The support frame (401) in the top support mechanism (4) is provided with a sliding top support frame (402) at the end, and the top support frame (402) is used to abut against one side of the paper stack on the belt conveyor (201); The bottom of the belt conveyor (201) and the top bracket (402) are both higher than the top of the pallet (5) so that the belt conveyor (201) and the top bracket (402) can move above the pallet (5).

7. The translation device for pallets on a paper stack according to claim 6, characterized in that: A first sliding frame (202) is fixedly installed at the bottom rear of the belt conveyor (201), and slide rails (206) are fixedly installed on both sides of the base (208). The bottom sides of the first sliding frame (202) are connected to the slide rails (206) through multiple sliders. A rack (207) is fixed in the middle of the base (208), and a gear driven by a motor is provided at the bottom of the first sliding frame (202), which is engaged with the rack (207); Multiple pulleys (203) are fixedly installed on both sides of the bottom front of the belt conveyor (201), and first support bars (204) are fixedly installed on both sides of the base (208). The pulleys (203) roll against the first support bars (204). A second support bar (205) flush with the first support bar (204) is fixed inside the conveying mechanism (1). The pulley (203) at the bottom of the belt conveyor (201) crosses the conveying mechanism (1) and rolls against the second support bar (205). The tray (5) is located between the two second support bars (205).

8. The translation device for pallets on a stack of paper according to claim 6, characterized in that: A fixed frame (405) is fixed at the end of the support frame (401), and the middle part of the top support frame (402) is connected to the fixed frame (405) through the second pushing mechanism (404). The cylinder of the second pushing mechanism (404) is fixed on the fixed frame (405), and the end of the pushing rod is fixed on the top support frame (402). Multiple second guide posts (403) are fixed around the top bracket (402), and a sliding sleeve is fixed at the corresponding position on the fixed frame (405). The second guide posts (403) move against the sliding sleeve.

9. The automatic pallet transfer device for paper stacks according to claim 1, characterized in that: Multiple support legs (202) are fixedly provided on the bottom of both sides of the panel (203) in the tray (5). A groove (201) is provided on the top of the panel (203) corresponding to the support legs (202). When multiple trays (5) are stacked, the support legs (202) abut against the groove (201). The L-plate (311) on the support arm (310) abuts against both sides of the panel (203), thereby lifting the tray (5) and separating the support legs (202) of the upper tray (5) from the groove (201) of the bottom tray (5).

10. The method of using the automatic paper stack transfer device for pallets according to any one of claims 1 to 9, characterized in that, The steps are as follows: S1. The stacked pallets (5) are conveyed on the conveying mechanism (1) to the pallet separating mechanism (3), and abut against the upper limit of the baffle (315). The first pushing mechanism (309) synchronously drives the two side arms (310) and L-plate (311) to lock on both sides of the second to last pallet (5). Then, the motor (304) drives the lifting frame (306) to lift all the pallets (5) except the bottom pallet (5) as a whole, thereby separating the bottom pallet (5) and continuing to move between the translation mechanism (2) and the top support mechanism (4) on the conveying mechanism (1). S2. The belt conveyor (201) in the translation mechanism (2) is driven by a servo motor to move the end of the belt conveyor (201) above the tray (5), and then the stacked paper stack above it is moved to the end by the belt conveyor (201). At the same time, the second pushing mechanism (404) in the top support mechanism (4) drives the top support frame (402) to abut against the end face of the paper stack. S3. Simultaneously, the paper stack is driven to move towards the end by the belt conveyor (201) and the belt conveyor (201) is driven to move backward as a whole by the servo motor, so that the end face of the paper stack is pressed against the top bracket (402) and transferred to the pallet (5). Then, the pallet (5) and the paper stack are transported to the next process by the conveying mechanism (1). S4. Repeat steps S1 to S3 to move multiple pallets (5) sequentially between the translation mechanism (2) and the top support mechanism (4) to transfer the paper stack to each pallet (5) and transport it to the next process.

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