Multi-layer automatic stacking machine

Abstract

The utility model discloses a multi-layer automatic stacker crane, which belongs to the technical field of corrugated board production equipment and comprises a paper stack arranging mechanism, a multi-layer stack placing mechanism is arranged at one end of the paper stack arranging mechanism, a stack lifting and stacking mechanism is arranged at one end of the multi-layer stack placing mechanism, and a paper stack beating and aligning mechanism is arranged at one end of the stack lifting and stacking mechanism. The stack lifting and stacking mechanism comprises a second supporting frame, a first lifting frame is arranged on the second supporting frame, and a telescopic frame is arranged on the first lifting frame; the paper stack aligning mechanism comprises a supporting frame, first push plate frames are arranged at the front end and the rear end of the supporting frame, and the first push plate frames are connected with the supporting frame. A first push plate is arranged on the first push plate frame at the front end; a second push plate is arranged on the first push plate frame at the rear end; the first push plate, the second push plate, the third push plate and the fourth push plate are all provided with independent push plate frames and are all movably connected with the lifting frame. The stacking uniformity of multiple stacks can be guaranteed, the paperboards are effectively prevented from being damaged, and the stacking efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of corrugated board production equipment, and particularly relates to a multi-layer automatic palletizer. Background Art

[0002] The statements in this part only provide background technical information related to the utility model, and do not necessarily constitute prior art.

[0003] In the production process of corrugated board, it is necessary to stack corrugated board or cartons into small stacks according to the set quantity or height, and then stack the small stacks into large stacks. At present, there are two forms of devices for stacking small stacks into large stacks. One is that the small stack is conveyed by a belt to the upper front of the large stack, and the small stack falls in a fish scale shape directly above the large stack while aligning the paper stack. This method cannot achieve multi-stack stacking. The other is that the small stack is pushed by a squeegee to the two side pallets directly above the large stack, and the two side pallets are simultaneously withdrawn to place the small paper stack on the large stack. This method can achieve multi-stack stacking, but when the cardboard stiffness is insufficient, it will cause cardboard damage and stacking disorder. At present, the small stack can only be stacked in one layer. For example, 20 pieces of cardboard are packed into one layer, and the efficiency is not high when stacking the small stack of cardboard onto the pallet to form a large stack subsequently. Summary of the Utility Model

[0004] Aiming at the above problems, the utility model provides a multi-layer automatic palletizer, which can ensure the neatness of multi-stack stacking, effectively prevent cardboard damage, and improve the stacking efficiency.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A multi-layer automatic palletizer includes a paper stack sorting mechanism. One end of the paper stack sorting mechanism is provided with a multi-layer stack placing mechanism. One end of the multi-layer stack placing mechanism is provided with a stack lifting and palletizing mechanism. One end of the stack lifting and palletizing mechanism is provided with a paper stack aligning mechanism.

[0007] The stack lifting and palletizing mechanism includes a second support frame. A first lifting frame is arranged on the second support frame. A telescopic frame is arranged on the first lifting frame. A belt roller reduction motor is arranged on the telescopic frame. The output end of the belt roller reduction motor is connected to a stack conveying belt roller. A number of stack conveying belt rollers are arranged at intervals, and the number of stack conveying belt rollers is connected by a stack conveying belt.

[0008] The paper stack aligning mechanism includes a support frame. First push plate frames are arranged at the front and rear ends of the support frame, and the first push plate frames are connected to the support frame. A first push plate is arranged on the first push plate frame at the front end. A second push plate is arranged on the first push plate frame at the rear end.

[0009] Further, a telescopic frame reduction motor is provided at one end of the telescopic frame. The output end of the telescopic frame reduction motor is connected to a gear. A rack is provided at the lower end of the telescopic frame. The gear meshes with the rack. The telescopic frame reduction motor drives the gear to rotate. The rotation of the gear drives the rack to move, and the movement of the rack drives the telescopic frame to expand and contract.

[0010] Further, a lifting frame reduction motor is provided at one end of the first lifting frame. The output end of the lifting frame reduction motor is connected to a chain. The lifting frame reduction motor and the chain cooperate to lift the first lifting frame.

[0011] Further, second push plate frames are provided at both ends of the first push plate frame. A third push plate is provided on the second push plate frame at one end, and a fourth push plate is provided on the second push plate frame at the other end. The first push plate frame and the second push plate frame are movably connected; the first push plate, the second push plate, the third push plate, and the fourth push plate are all provided with independent push plate frames and are all movably connected to the lifting frame.

[0012] Further, the multi-layer stacking mechanism includes a first support frame. Moving frames are provided at both ends of the first support frame. The first support frame and the moving frames are movably connected; a belt roller motor is provided at one end of the moving frame. A plurality of belt rollers are arranged at intervals on the moving frame. The plurality of belt rollers are connected by a conveyor belt; the output end of the belt roller motor is connected to the belt rollers.

[0013] Further, a roller cylinder cylinder is provided on the side of the moving frame. The output end of the roller cylinder cylinder is connected to a roller; a lifting frame and a second reduction motor are provided at the lower end of the first support frame. A plurality of front belt rollers are arranged at intervals at one end of the lifting frame, and a rear belt roller is provided at the other end.

[0014] Further, the front belt rollers and the rear belt roller are connected by a stacking belt. A plurality of stacking belts are arranged at intervals; a first reduction motor is provided on one side of the lifting frame. The output end of the first reduction motor is connected to the rear belt roller.

[0015] Further, the paper stack sorting mechanism includes a bracket. A plurality of power rollers driven to rotate in the same direction by a power roller driving motor are provided on the bracket. The power roller driving motor is fixed on a power roller driving motor bracket; a linear slide rail beam is also provided on the bracket. The linear slide rail beam is divided into a front-end linear slide rail beam and a rear-end linear slide rail beam; a push plate moving along the linear slide rail beam is provided above the power rollers. The push plate includes a left push plate and a right push plate. The left push plate and the right push plate are respectively controlled by their own servo motors; a servo motor and a speed reducer are provided on each side of the front-end linear slide rail beam. A liftable baffle is fixedly connected to the rear side of the rear-end linear slide rail beam.

[0016] Furthermore, the baffle is arranged on a baffle bracket which is fixedly connected to the rear linear slide rail beam; a plurality of baffle telescopic devices are arranged on the baffle bracket, the piston rod of the baffle telescopic device is fixedly connected to the ear plate of the baffle, and the upper part of the baffle is slidably connected to the main body of the baffle telescopic device; the baffle telescopic device, the power roller driving motor, the servo motor and the speed reducer are all connected to the controller.

[0017] Furthermore, a power roller support beam is arranged on the bracket, and the power roller support beam is used for fixing the mandrel of the power roller. The power roller is connected to the mandrel through a bearing; the end of the power roller is a double-row sprocket, and the power rollers are interconnected and synchronously rotated through a chain; the output end of the power roller driving motor is located at the bottom of one of the power roller support beams and is connected to the power roller through a chain; a runner is fixedly arranged on the output end of the speed reducer, and the two runners are not on the same straight line; two pulley support rods are fixedly connected between the front linear slide rail beam and the rear linear slide rail beam; a pulley is rotatably connected to each of the pulley support rods, and the two pulleys are not on the same straight line; the runner is connected to the pulley through a belt; the bottom of the linear slide rail beam is a slide rail, and both the left push plate and the right push plate include a push plate main body. Two sliders matching the slide rail are arranged on the push plate main body; a clamping piece is further arranged on the push plate main body, and the clamping piece can clamp the belt on the push plate main body; the clamping pieces of the two push plate main bodies are not installed on the same straight line.

[0018] Compared with the prior art, the advantages and positive effects of the present utility model are:

[0019] The paper stacks of the present utility model are conveyed backward in multiple layers. The paper stacks are pushed to the set position by the push plates and baffles of the paper stack sorting mechanism. After the pushing is completed, the baffle rises to continue conveying the paper stacks, which can greatly improve the efficiency of palletizing large stacks and ensure the accurate position of the paper stacks; at this time, the multi-layer stacking mechanism stacks the paper stacks synchronously left and right, ensuring that the paper stacks fall parallel. When stacking left and right, the supporting rollers are lifted, and the linear speed of the supporting rollers is consistent with the stacking linear speed. There is no friction between the paper stacks and the supporting rollers, ensuring the accurate stacking position and placing the paper stacks into multiple layers; then it enters the stack lifting and palletizing mechanism, and the stacked paper stacks are conveyed to the paper stack aligning mechanism by the stack lifting and palletizing mechanism. When telescoping and stacking, the paper stacks fall against the push plates in the opposite direction of the entrance, which can effectively prevent the paper stacks from tilting; the first to fourth push plates of the paper stack aligning mechanism move from four directions to the paper stack position, and the paper stacks on the pallet are pushed and aligned by the four-sided push plates, ensuring the neatness of the paper stacks; through the cooperation of the paper stack sorting mechanism, the multi-layer stacking mechanism, the stack lifting and palletizing mechanism and the paper stack aligning mechanism, the neatness of multi-stack stacking can be guaranteed, effectively preventing damage to the cardboard and improving the stacking efficiency. Description of the Drawings

[0020] The attached drawings forming a part of the present utility model are used to provide a further understanding of the present utility model. The schematic embodiments and descriptions thereof of the present utility model are used to explain the present utility model and do not constitute an improper limitation of the present utility model.

[0021] Figure 1 is the front view of the multi-layer automatic palletizer of the present utility model;

[0022] Figure 2 is the top view of the multi-layer automatic palletizer of the present utility model;

[0023] Figure 3 is the front view of the paper stack sorting mechanism of the present utility model;

[0024] Figure 4 is the top view of the paper stack sorting mechanism of the present utility model;

[0025] Figure 5 is Figure 4 the enlarged view of part A in

[0026] Figure 6 is the front view of the multi-layer stacking mechanism of the present utility model;

[0027] Figure 7 is the top view of the multi-layer stacking mechanism of the present utility model;

[0028] Figure 8 is the front view of the lifting and palletizing mechanism of the present utility model;

[0029] Figure 9 is the top view of the lifting and palletizing mechanism of the present utility model;

[0030] Figure 10 is the front view of the paper stack aligning mechanism of the present utility model;

[0031] Figure 11 is the top view of the paper stack aligning mechanism of the present utility model;

[0032] In the figure: 1. Paper stack sorting mechanism; 101. Bracket; 102. Controller; 103. Power roller drive motor bracket; 104. Power roller drive motor; 105. Ear plate; 106. Baffle telescopic device; 107. Baffle; 108. Servo motor; 109. Reducer; 110. Push plate; 111. Power roller; 112. Baffle bracket; 113. Linear slide rail beam; 114. Power roller support beam; 115. Slide block; 116. Runner; 117. Belt; 118. Clamping piece; 119. Pulley support rod; 120. Pulley; 121. Push plate main body;

[0033] 2. Multi-layer stacking mechanism; 201. First support frame; 202. Moving frame; 203. Belt roller motor; 204. Belt roller; 205. Conveyor belt; 206. Idler roller; 207. Idler roller cylinder; 208. Idler roller gear; 209. Lifting frame; 210. First reduction motor; 211. Stacking belt; 212. Front belt roller; 213. Rear belt roller; 214. Second reduction motor; 215. Rotating shaft;

[0034] 3. Stack lifting and stacking mechanism; 301. Second support frame; 302. First lifting frame; 303. Telescopic frame; 304. Telescopic frame reduction motor; 305. Stack conveyor belt; 306. Stack conveyor belt roller; 307. Lifting frame reduction motor; 308. Chain; 309. Belt roller reduction motor;

[0035] 4. Paper stack aligning mechanism; 401. Support frame; 402. First push plate frame; 403. Second push plate frame; 404. First push plate; 405. Second push plate; 406. Third push plate; 407. Fourth push plate; 408. Lifting frame. Detailed implementation mode

[0036] It should be noted that the following detailed description is illustrative and aims to provide further explanation of the present utility model. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which the present utility model belongs.

[0037] The present utility model will be described in detail below with reference to the accompanying drawings. A multi-layer automatic palletizer disclosed in this embodiment is as Figure 1 and Figure 2 shown. It includes a paper stack sorting mechanism 1. One end of the paper stack sorting mechanism 1 is provided with a multi-layer stacking mechanism 2. One end of the multi-layer stacking mechanism 2 is provided with a stack lifting and stacking mechanism 3. One end of the stack lifting and stacking mechanism 3 is provided with a paper stack aligning mechanism 4;

[0038] As Figure 8 and Figure 9 shown, the stack lifting and stacking mechanism 3 includes a second support frame 301. A first lifting frame 302 is arranged on the second support frame 301. A telescopic frame 303 is arranged on the first lifting frame 302; A belt roller reduction motor 309 is arranged on the telescopic frame 303. The output end of the belt roller reduction motor 309 is connected to the stack conveyor belt roller 306. A number of stack conveyor belt rollers 306 are arranged at intervals. A number of stack conveyor belt rollers 306 are connected by a stack conveyor belt 305;

[0039] One end of the telescopic frame 303 is provided with a telescopic frame reduction motor 304. The output end of the telescopic frame reduction motor 304 is connected to a gear. A rack is provided at the lower end of the telescopic frame 303. The gear meshes with the rack. The telescopic frame reduction motor 304 drives the gear to rotate. The rotation of the gear drives the rack to move, and the movement of the rack drives the telescopic frame 303 to expand and contract. One end of the first lifting frame 302 is provided with a lifting frame reduction motor 307. The output end of the lifting frame reduction motor 307 is connected to a chain. The lifting frame reduction motor 307 and the chain cooperate to lift the first lifting frame 302.

[0040] The stack lifting and palletizing mechanism 3 is located in front of the paper stack. The stacking conveyor belt 305 and the stacking conveyor belt roller 306 are fixed to the telescopic frame 303. The paper stack enters the belt. The frame places the small paper stack on the pallet in a telescopic manner, that is, the telescopic frame 303 first extends above the pallet, and at the same time the paper stack also reaches above the pallet. The frame retracts while the belt rotates and the linear velocity of the belt is consistent with the retraction linear velocity, and the paper stack is placed on the pallet. As Figure 8 shown, the telescopic frame 303 is fixed to the lifting frame through linear slide rails. As the paper stack on the pallet gradually rises, the stack lifting frame also gradually rises.

[0041] As Figure 10 and Figure 11 shown, the paper stack aligning mechanism 4 includes a support frame 401. The front and rear ends of the support frame 401 are provided with a first push plate frame 402. The first push plate frame 402 and the support frame 401 are movably connected; a first push plate 404 is provided on the front first push plate frame 402; a second push plate 405 is provided on the second push plate frame 403 at the rear end. Second push plate frames 403 are provided at both ends of the first push plate frame 402. A third push plate 406 is provided on one second push plate frame 403, and a fourth push plate 407 is provided on the second push plate frame 403 at the other end. The first push plate frame 402 and the second push plate frame 403 are movably connected. The third push plate 406 and the fourth push plate 407 each have their own push plate frames and are both movably connected to the lifting frame 408, and the four-sided push plates are independent of each other.

[0042] The push plate at the stack inlet position can be lifted under the drive of a cylinder. The four-sided push plates are located above the pallet. When a paper stack needs to be placed, the push plate at the stack inlet position rises upward to make room for the third-stage telescopic frame to extend above the pallet. After the paper stack is placed on the pallet, the four-sided push plates align the cardboard from four sides according to the set cardboard size, and the four-sided push plates also gradually rise as the paper stack rises.

[0043] As Figure 6 and Figure 7As shown in the figure, the multi-layer stacking mechanism includes a first support frame 201. Moving frames 202 are arranged at both ends of the first support frame 201, and the first support frame 201 and the moving frames 202 are movably connected. A belt roller motor 203 is arranged at one end of the moving frame 202, and a number of belt rollers 204 are arranged at intervals on the moving frame 202. The number of belt rollers 204 are connected by a conveyor belt 205. The output end of the belt roller motor 203 is connected to the belt roller 204 through gears. The belt roller motor 203 drives one belt roller 204 to rotate, and then the other belt rollers 204 are driven to rotate synchronously by the conveyor belt 205. A support roller cylinder 207 is arranged on the side of the moving frame 202, and the output end of the support roller cylinder 207 is connected to the support roller 206. The support roller cylinder 207 is connected to the support roller through a rotating shaft 215 and a swing arm. A lifting frame 209 is arranged at the lower end of the first support frame 201, and a second reduction motor 214 is also arranged at the lower end of the first support frame. A number of front belt rollers 212 are arranged at intervals at one end of the lifting frame 209, and a rear belt roller 213 is arranged at the other end. The front belt rollers 212 and the rear belt roller 213 are connected by a stacking belt 211, and a number of stacking belts 211 are arranged at intervals. A first reduction motor 210 is arranged on one side of the lifting frame 209, and the output end of the first reduction motor 210 is connected to the rear belt roller 213.

[0044] The support rollers 206 are located on the left and right sides of the moving frame 202. When the left and right stacking mechanisms receive a stack, the support rollers 206 are in the lowered state, and the roller surfaces are lower than the belt. After the paper stack completely enters the stacking mechanism, the support rollers 206 are lifted, and the roller surfaces are higher than the belt. The left and right stacking mechanisms move quickly to the left and right respectively. When the distance between the left and right stacking mechanisms is greater than the width of the paper stack, the paper stack falls onto the lifting stacking platform. Then the left and right stacking mechanisms return to the set position and continue to receive stacks. The lifting stacking platform is located below the stacking mechanism. The lifting frame 209, the stacking belt 211, the front belt rollers 212, the rear belt roller 213, the belt roller motor 203, and the first reduction motor 210 drive the frame to lift through a chain. Detection photoelectric sensors are arranged below the left and right stacking mechanisms. When the paper stack falls onto the stacking platform and the photoelectric sensor detects the paper stack, the stacking platform descends for subsequent continuous stacking. When the number of layers or height of the paper stack on the stacking platform reaches the set value, the stacking belt 211 rotates to output the paper stack backward, and then returns to the set position to continue stacking.

[0045] As Figure 3 and Figure 4As shown in the figure, the paper stack sorting mechanism includes a bracket 101. A plurality of power rollers 111 driven to rotate in the same direction by a power roller driving motor 104 are arranged on the bracket 101. The power roller driving motor 104 is fixed on a power roller driving motor bracket 103. A linear slide rail beam 113 is also arranged on the bracket 101. The linear slide rail beam 113 is divided into a front-end linear slide rail beam and a rear-end linear slide rail beam. Above the power rollers 111, there is a push plate 110 that moves along the linear slide rail beam 113. The push plate 110 includes a left push plate and a right push plate, and the left push plate and the right push plate are respectively controlled by their own servo motors 108. On both sides of the front-end linear slide rail beam, there is a servo motor 108 and a speed reducer 109 respectively. At the rear side of the rear-end linear slide rail beam, there is a liftable baffle 107 fixedly connected.

[0046] The baffle 107 is arranged on a baffle bracket 112, and the baffle bracket 112 is fixedly connected to the rear-end linear slide rail beam. Two baffle telescopic devices 106 are arranged on the baffle bracket 112. The piston rod of the baffle telescopic device 106 is fixedly connected to the ear plate 105 of the baffle 110, and the upper part of the baffle 107 is slidably connected to the main body of the baffle telescopic device 106. The baffle telescopic device 106, the power roller driving motor 104, the servo motor 108, and the speed reducer 109 are all connected to a controller 102. It is the existing technology for the controller 102 to receive signals and then control the actions of the power roller driving motor 104, the servo motor 108, the baffle telescopic device 106, and the speed reducer 109.

[0047] A power roller support beam 114 is arranged on the bracket 101. The power roller support beam 114 is used to fix the mandrel of the power roller 111, and the power roller 111 is connected to the mandrel through a bearing. The end of the power roller 111 is a double-row sprocket, and the power rollers 111 are connected to each other through a chain to rotate synchronously. As Figure 5 shown, the output end of the power roller driving motor 104 is located at the bottom of one of the power roller support beams 114 and is connected to the power roller 111 through a chain. A runner 116 is fixedly arranged on the output end of the speed reducer 109. The two runners 116 are not on the same straight line. Two pulley support rods 119 are fixedly connected between the front-end linear slide rail beam and the rear-end linear slide rail beam. A pulley 120 is rotatably connected to each of the pulley support rods 119. The two pulleys 120 are not on the same straight line. The runner 116 is connected to the pulley 120 through a belt 117. The bottom of the linear slide rail beam 113 is a slide rail. The left push plate and the right push plate both include a push plate main body 121. Two sliders 115 that match the slide rail are arranged on the push plate main body 121. A clamping piece 118 is also arranged on the push plate main body 121. The clamping piece 118 can clamp the belt 117 on the push plate main body 121. The clamping pieces of the two push plate main bodies 121 are not installed on the same straight line.

[0048] In the initial state, the baffle is in the lowered state, the left push plate and the right push plate are both located on both sides of the frame, and the power roller 111 stops rotating. An optoelectronic sensor is arranged at the inlet end of the power roller 111 to detect the number of paper stacks entering; when the optoelectronic sensor detects the signal that the small paper stack reaches the power roller 111, the driving motor 104 of the power roller rotates, and the power roller 111 drives the small paper stack to stay at the baffle. Then, when the optoelectronic sensor detects that the number of small paper stacks entering reaches the set number, the left push plate is controlled to push this column of small paper stacks to the right to make way for the stacking space; when the optoelectronic sensor detects again that the number of small paper stacks entering reaches the set number, the left push plate and the right push plate are controlled to push the small paper stacks entering twice to the middle. Finally, the baffle is controlled to lift, the left push plate and the right push plate are controlled to move outwards respectively to return to the initial state, and the power roller 111 drives the paper stack to be output behind the baffle. It is also possible to place the single paper stack in a staggered manner, that is, the first small paper stack entering is pushed to the left according to the set position, then the baffle rises and the paper stack is output; the second small paper stack is pushed into the right according to the set position, and then the baffle rises and the paper stack is output. In this embodiment, it is possible to achieve multi-stack arrangement of small paper stacks in the front and back, with 2 stacks or 3 stacks in the front and back, and 2 stacks arranged on the left and right for stacking.

[0049] Usage method of the palletizer:

[0050] Usage method: The paper stack is pushed to the set position through the push plate and the baffle of the paper stack sorting mechanism 1. After the pushing is completed, the baffle rises to continue transporting the paper stack, which can greatly improve the efficiency of palletizing large stacks on the pallet and ensure the accurate position of the paper stack; at this time, the multi-layer stacking mechanism 2 stacks synchronously on the left and right to ensure that the paper stack falls parallel. When stacking on the left and right, the idler roller 206 is lifted, and the linear speed of the idler roller 206 is consistent with the stacking linear speed. There is no friction between the paper stack and the idler roller 206 to ensure the accurate stacking position and place the paper stack into multiple layers; then it enters the stack lifting and palletizing mechanism 3, and the stacked paper stack is transported to the paper stack aligning mechanism 4 through the stack lifting and palletizing mechanism 3. When the paper stack is placed and stacked, the paper stack leans against the push plate in the opposite direction of the inlet and falls, which can effectively prevent the paper stack from tilting; the first to fourth push plates of the paper stack aligning mechanism 4 move from four directions to the paper stack position, and the paper stack on the pallet is pushed and aligned by the four-sided push plates to ensure the neatness of the paper stack; through the cooperation of the paper stack sorting mechanism 1, the multi-layer stacking mechanism 2, the stack lifting and palletizing mechanism 3 and the paper stack aligning mechanism 4, the neatness of multi-stack stacking can be ensured, effectively preventing damage to the cardboard and improving the stacking efficiency.

[0051] Although the specific implementation manners of the present invention are described above in conjunction with the drawings, it is not a limitation to the protection scope of the present invention. Those skilled in the art should understand that based on the technical solutions of the present invention, various modifications or deformations that can be made by those skilled in the art without creative labor are still within the protection scope of the present invention.

Claims

1. A multi-layer automatic palletizer, characterized in that, It includes a paper stack sorting mechanism. One end of the paper stack sorting mechanism is provided with a multi-layer stacking mechanism. One end of the multi-layer stacking mechanism is provided with a stack lifting and palletizing mechanism. One end of the stack lifting and palletizing mechanism is provided with a paper stack aligning mechanism; The stack lifting and palletizing mechanism includes a second support frame. A first lifting frame is arranged on the second support frame. A telescopic frame is arranged on the first lifting frame; A belt roller reduction motor is arranged on the telescopic frame. The output end of the belt roller reduction motor is connected to a stack conveying belt roller. A number of the stack conveying belt rollers are arranged at intervals. The number of stack conveying belt rollers are connected by a stack conveying belt; The paper stack aligning mechanism includes a support frame. First push plate frames are arranged at the front and rear ends of the support frame. The first push plate frames are connected to the support frame; A first push plate is arranged on the first push plate frame at the front end; A second push plate is arranged on the first push plate frame at the rear end.

2. The multi-layer automatic palletizer according to claim 1, characterized in that, One end of the telescopic frame is provided with a telescopic frame reduction motor. The output end of the telescopic frame reduction motor is connected to a gear. A rack is arranged at the lower end of the telescopic frame. The gear meshes with the rack. The telescopic frame reduction motor drives the gear to rotate. The rotation of the gear drives the rack to move. The movement of the rack drives the telescopic frame to expand and contract.

3. The multi-layer automatic palletizer according to claim 2, wherein, One end of the first lifting frame is provided with a lifting frame reduction motor. The output end of the lifting frame reduction motor is connected to a chain. The lifting frame reduction motor and the chain cooperate to lift the first lifting frame.

4. A multi-layer automatic palletizer according to claim 1, characterized in that, Second push plate frames are arranged at both ends of the first push plate frame. A third push plate is arranged on the second push plate frame at one end. A fourth push plate is arranged on the second push plate frame at the other end. The first push plate frame is movably connected to the second push plate frame. The first push plate, the second push plate, the third push plate and the fourth push plate are all provided with independent push plate frames and are all movably connected to the lifting frame.

5. The multi-layer automatic palletizer according to claim 1, wherein, The multi-layer stacking mechanism includes a first support frame. Moving frames are arranged at both ends of the first support frame. The first support frame is movably connected to the moving frames; A belt roller motor is arranged at one end of the moving frame. A number of belt rollers are arranged at intervals on the moving frame. The number of belt rollers are connected by a conveying belt; The output end of the belt roller motor is connected to the belt roller.

6. The multi-layer automatic palletizer according to claim 5, wherein, A roller cylinder is arranged on the side of the moving frame. The output end of the roller cylinder is connected to a roller; A lifting frame and a second reduction motor are arranged at the lower end of the first support frame. A number of front belt rollers are arranged at intervals at one end of the lifting frame. A rear belt roller is arranged at the other end.

7. The multi-layer automatic palletizer according to claim 6, wherein The front belt rollers and the rear belt roller are connected by a stack receiving belt. A number of the stack receiving belts are arranged at intervals; A first reduction motor is arranged on one side of the lifting frame. The output end of the first reduction motor is connected to the rear belt roller.

8. The multi-layer automatic palletizer according to claim 1, wherein, The paper stack sorting mechanism includes a bracket, on which a plurality of power rollers driven by a power roller driving motor to rotate in the same direction are arranged. The power roller driving motor is fixed on the power roller driving motor bracket. A linear slide rail beam is also arranged on the bracket, which is divided into a front-end linear slide rail beam and a rear-end linear slide rail beam. Above the power rollers, there is a push plate moving along the linear slide rail beam. The push plate includes a left push plate and a right push plate, and the left push plate and the right push plate are respectively controlled by their own servo motors. On both sides of the front-end linear slide rail beam, there is a servo motor and a speed reducer respectively. At the rear side of the rear-end linear slide rail beam, there is a liftable baffle plate fixedly connected.

9. The multi-layer automatic palletizer according to claim 8, wherein, The baffle plate is arranged on a baffle plate bracket, and the baffle plate bracket is fixedly connected to the rear-end linear slide rail beam. A plurality of baffle plate telescopic devices are arranged on the baffle plate bracket. The piston rod of the baffle plate telescopic device is fixedly connected to the ear plate of the baffle plate, and the upper part of the baffle plate is slidably connected to the main body of the baffle plate telescopic device. The baffle plate telescopic device, the power roller driving motor, the servo motor, and the speed reducer are all connected to the controller.

10. A multi-layer automatic palletizer according to claim 9, characterized in that, A power roller support beam is arranged on the bracket, which is used to fix the core shaft of the power roller. The power roller and the core shaft are connected by bearings. The end of the power roller is a double-row sprocket, and the power rollers are connected to each other by a chain to rotate synchronously. The output end of the power roller driving motor is located at the bottom of one of the power roller support beams and is connected to the power roller by a chain. A runner is fixedly arranged on the output end of the speed reducer, and the two runners are not on the same straight line. Two pulley support rods are fixedly connected between the front-end linear slide rail beam and the rear-end linear slide rail beam. A pulley is rotatably connected to each of the pulley support rods, and the two pulleys are not on the same straight line. The runner and the pulley are connected by a belt. The bottom of the linear slide rail beam is a slide rail. The left push plate and the right push plate both include a push plate main body, and two sliders matching the slide rail are arranged on the push plate main body. A clamping piece is also arranged on the push plate main body, and the clamping piece can clamp the belt on the push plate main body. The clamping pieces of the two push plate main bodies are not installed on the same straight line.

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