Plate centering conveying device and method

Abstract

The invention provides a plate centering conveying device and method, and belongs to the technical field of plate conveying, the plate centering conveying device comprises a rack, and the rack is sequentially divided into a centering part, a first cleaning part, an overturning part and a second cleaning part in the advancing direction; conveying rollers are arranged on the rack of the centering part, the first cleaning part and the second cleaning part; a centering assembly is arranged on the centering part, and the centering assembly can follow the plate and center the plate. The clamping blocks are driven by the telescopic cylinders to oppositely clamp a plate, then the clamping plates move along with the plate, rapid resetting can be achieved through the first motor, the centering stability is guaranteed, the plate can be stably centered within a longer distance, compared with common clamping centering, the friction force received by the plate is reduced, and the surface of the wrapped plate cannot be scratched; and secondly, even if part of grooves or other irregular structures are formed in the two sides of the plate, the situation that the plate and the centering assembly are clamped cannot occur, and practicability is good.

Description

Technical Field

[0001] The present invention belongs to the technical field of sheet conveying, and particularly relates to a sheet centering conveying device and method. Background Art

[0002] In the modern sheet processing field, as the basic material for many industries such as furniture manufacturing, the processing quality and efficiency of sheets directly affect the performance and cost of the final products. Sheet materials cover various types such as blockboards, plywoods, decorative panels, etc., and are widely used in the production of products such as furniture and doors and windows. In the actual processing process, sheets need to go through multiple processes such as dust sweeping, hot pressing, paper scraping and edge trimming, sheet drying, sheet inspection, etc., and the precise connection between each process puts higher requirements on the conveying device.

[0003] Traditional sheet conveying devices mainly undertake the function of sheet conveying, but there are obvious limitations in functionality. During the sheet conveying process, centering and positioning is a key link to ensure the subsequent processing accuracy and quality. Existing centering devices in conveying, such as a sheet centering conveying mechanism with the publication number CN 106743407 A, although it realizes the centering of sheets, it still has the following deficiencies: 1. When centering, this device needs to rotate the rollers to reduce the friction between the sheet and the centering mechanism. However, there are gaps between adjacent rollers. When centering sheets with uneven sides, grooves or protrusions, the grooves are easily stuck between the two rollers, or due to the small size of the sheet, the four corners of the sheet are exactly stuck between the two rollers, causing inconvenience in production; 2. After the sheet is centered, a film covering operation needs to be carried out, and the film covering operation requires cleaning both sides of the sheet first. Summary of the Invention

[0004] In order to solve the problems existing in the above-mentioned prior art, a sheet centering conveying device and method are proposed.

[0005] The technical solution for the present invention to solve the technical problems is as follows: On the one hand, a sheet centering conveying device is proposed, which includes a frame. The frame is sequentially divided into a centering part, a first cleaning part, a flipping part and a second cleaning part along the forward direction; among them, conveying rollers are arranged on the frames of the centering part, the first cleaning part and the second cleaning part. A centering component is arranged on the centering part. The centering component can follow the sheet and center the sheet; the conveying rollers can convey the sheet from the centering part to the first cleaning part. The first cleaning part includes a fixed cover. The fixed cover is sleeved above the first cleaning part. A cleaning brush is arranged inside the fixed cover. The cleaning brush can clean the sheet conveyed below. The conveying rollers can convey the sheet from the first cleaning part to the flipping part. A flipping component is arranged on the flipping part, and the flipping component can flip the sheet material and place it on the conveying rollers of the second cleaning part; The second cleaning part includes a fixed cover which is sleeved above the second cleaning part, and a cleaning brush is arranged inside the fixed cover. The cleaning brush can clean the flipped sheet material below.

[0006] Preferably, the centering component includes two support plates which are respectively fixed on both sides of the frame. A connecting rod is rotatably connected to the support plates. The connecting rod is L-shaped. The bottom of the connecting rod is connected to a telescopic cylinder, and the top is rotatably connected to one end of a first connecting rod. The other end of the first connecting rod is rotatably connected to a clamping block. The clamping blocks on the two support plates can clamp the sheet material towards each other; A vertical guide rod is also connected to the bottom of the frame, and a guide block is sleeved on the guide rod. The guide block can slide along the guide rod. One end of a second connecting rod is rotatably connected to each side of the guide rod, and the other end of the second connecting rod is connected to one end of a positioning rod. The other end of the positioning rod is fixed on the connecting rod.

[0007] Preferably, a through groove is formed in the middle of the clamping block along the conveying direction. A clamping plate is slidably connected horizontally in the through groove. Limit grooves are formed in the top plate and the bottom plate of the through groove. Corresponding limit blocks are connected to the top and the bottom of the clamping plate. The limit blocks can slide in the limit grooves; A rack is also connected to the top of the clamping plate. A gear is rotatably connected to the corresponding clamping block. The gear is driven to rotate by a first motor on the clamping block.

[0008] Preferably, a vertical rod is also arranged on the frame, and a slider is connected to the vertical rod. A sliding groove is formed in the corresponding clamping block, and the slider can slide in the sliding groove.

[0009] Preferably, the flipping component includes two flipping shafts rotatably connected to the frame. A first flipping rod is connected to the middle of one flipping shaft, and a second flipping rod is connected to the middle of the other flipping shaft. The first flipping rod and the second flipping rod are arranged back to back and are offset; A first clamping groove is formed in the top of the first flipping rod, and the first clamping groove can block the sheet material conveyed from the cleaning part; A second clamping groove is formed in the top of the second flipping rod. The second clamping groove is arranged back to back with the first clamping groove, and the second clamping groove can catch the sheet material that breaks away from the first clamping groove when the first flipping rod rotates to the highest point; The first flipping rod and the second flipping rod are driven to rotate by a driving component.

[0010] Preferably, the driving component includes a rotating shaft. A first sprocket is connected to the middle of the rotating shaft. Driving disks are respectively connected to both ends of the rotating shaft. Two convex blocks are respectively connected to the two driving disks and are arranged back to back; A fixing plate is connected to the bottom of the frame, and a fixed seat is connected to the fixing plate. The rotating shaft is rotatably connected to the fixed seat, and the fixed seat is arranged between the first sprocket and the driving disks; A driving shaft is also connected to the bottom of the frame. The driving shaft is driven to rotate by a second motor on the frame; A second sprocket is connected to the driving shaft. The first sprocket and the second sprocket are connected by a transmission chain; A first driving rod and a second driving rod are respectively rotatably connected to the two convex blocks. The first driving rod is rotatably connected to the first flipping rod, and the second driving rod is rotatably connected to the second flipping rod.

[0011] Preferably, reinforcing rods are vertically provided on the first turning rod and the second turning rod to prevent the board from slipping.

[0012] Preferably, the ends of the conveying rollers are connected to the first driving wheel and the second driving wheel. The conveying rollers are connected by a transmission belt. The transmission belt is respectively connected to the first driving wheels of the two conveying rollers, and the second driving wheel on the next conveying roller is connected to the second driving wheel on this conveying roller by a transmission belt to achieve transmission.

[0013] On the other hand, a method for cleaning a board using the board centering and conveying device is proposed, including the following steps: S1. Conveying: Convey the manufactured board through the conveying rollers. S2. Centering: The board is conveyed by the conveying rollers to the centering part. The telescopic cylinder is started. The telescopic cylinder drives the clamping blocks to clamp the board towards each other. The board is connected to the clamping plates on the clamping blocks. While the clamping plates slide following the board, it ensures that the board is centered and conveyed on the conveying rollers. S3. Primary cleaning: The conveying rollers convey the centered board to the first cleaning part, and the front surface of the board is cleaned by the cleaning brush arranged on the upper part. S4. Flipping the board: The conveying rollers convey the board to the first turning rod of the flipping part. The first turning rod and the second turning rod rotate towards each other synchronously to move the board from the first turning rod to the second turning rod, realizing the flipping of the board. S5. Secondary cleaning: The end of the board on the second turning rod enters the second cleaning part driven by the conveying rollers of the second cleaning part, and the back surface of the board is cleaned by the cleaning brush. S6. Coating: The cleaned board is subjected to a film coating treatment.

[0014] Compared with the prior art, the above technical solution has the following advantages or beneficial effects: 1. In the present invention, the telescopic cylinder drives the clamping blocks to clamp the board towards each other, and then the clamping plates follow the movement of the board and can be quickly reset by the first motor. This not only ensures the stability of centering, enables the board to be stably centered over a longer distance, but also reduces the friction force received compared with ordinary clamping centering, ensuring that the surface of the board will not be scratched. Secondly, even if some grooves or other irregular structures are opened on both sides of the board, there will be no situation where the board gets stuck with the centering components, and the practicability is good.

[0015] 2. In the present invention, the chain wheel drives the driving disc, which in turn drives the first turning rod and the second turning rod to rotate towards each other. This realizes that the board first falls from the first cleaning part to the first turning rod, then rotates towards each other to turn over, and finally the board falls onto the conveying rollers of the second cleaning part through the second turning rod after being turned over, completing the double-sided cleaning of the board and making sufficient preparations for coating the board with a film. Description of the Drawings

[0016] The attached drawings forming a part of the present invention are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention.

[0017] Figure 1 is a schematic diagram of the structure of the present invention Figure 1 .

[0018] Figure 2 is Figure 1 a schematic diagram of the structure at position A in

[0019] Figure 3 is a schematic diagram of the structure of the present invention Figure 2 .

[0020] Figure 4 is Figure 3 an enlarged view of position B in

[0021] Figure 5 is a schematic diagram of the bottom view structure of the present invention.

[0022] Figure 6 is Figure 5 an enlarged view of position C in

[0023] Figure 7 is Figure 5 an enlarged view of position D in

[0024] Figure 8 is a schematic diagram of the structure at the connection of the conveying rollers.

[0025] Explanation of reference numerals: 1, frame; 11, centering part; 12, first cleaning part; 13, flipping part; 14, second cleaning part; 2, centering component; 21, support plate; 22, connecting rod; 23, telescopic cylinder; 24, first connecting rod; 25, clamping block; 26, guide rod; 27, guide block; 28, second connecting rod; 29, positioning rod; 210, through groove; 211, limiting groove; 212, clamping plate; 213, limiting block; 214, rack; 215, gear; 216, first motor; 217, vertical rod; 218, slider; 219, chute; 3, fixed cover; 31, cleaning brush; 4, conveying roller; 41, first driving wheel; 42, second driving wheel; 43, transmission belt; 5, flipping component; 51, flipping shaft; 52, first flipping rod; 53, first clamping groove; 54, second flipping rod; 55, second clamping groove; 56, reinforcing rod; 6, driving component; 61, rotating shaft; 62, first sprocket; 63, driving disc; 64, convex block; 65, fixing plate; 66, fixed seat; 67, driving shaft; 68, second sprocket; 69, transmission chain; 610, first driving rod; 611, second driving rod. Detailed implementation manners

[0026] In order to clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with its accompanying drawings. The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and settings of specific examples are described below. In addition, the present invention may repeat reference numerals and / or letters in different examples. This repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. It should be noted that the components illustrated in the drawings are not necessarily drawn to scale. The present invention omits the description of well-known components, processing technologies, and processes to avoid unnecessarily limiting the present invention. The orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Embodiment 1: Please refer to Figures 1-8 , this embodiment proposes a sheet centering and conveying device, which is mainly used for cleaning and conveying the sheet before laminating the sheet. It includes a frame 1, and the frame 1 is sequentially divided into a centering part 11, a first cleaning part 12, a flipping part 13, and a second cleaning part 14 along the forward direction; among them, conveying rollers 4 are arranged on the frames 1 of the centering part 11, the first cleaning part 12, and the second cleaning part 14; A centering component 2 is arranged on the centering part 11, and the centering component 2 can follow the sheet and center the sheet; the conveying roller 4 can convey the sheet from the centering part 11 to the first cleaning part 12, The first cleaning part 12 includes a fixed cover 3, the fixed cover 3 is sleeved above the first cleaning part 12, and a cleaning brush 31 is arranged inside the fixed cover 3. The cleaning brush 31 can clean the sheet conveyed below, and the conveying roller 4 can convey the sheet from the first cleaning part 12 to the flipping part 13; A flipping component 5 is arranged on the flipping part 13, and the flipping component 5 can flip the sheet and place it on the conveying roller 4 of the second cleaning part 14; The second cleaning part 14 includes a fixed cover 3. The fixed cover 3 is sleeved above the second cleaning part 14, and a cleaning brush 31 is arranged inside the fixed cover 3. The cleaning brush 31 can clean the plate after it is turned over below.

[0028] During use, before cleaning, in order to ensure the centering and conveying of the plate and ensure uniform force when it passes through the cleaning brush 31, a centering operation needs to be performed before cleaning. At the same time, its centering component 2 can also be arranged on the conveying roller 4 after cleaning to ensure that it is centered when it is conveyed to the laminating machine.

[0029] Embodiment 2: Please refer to Figure 1 、 Figure 2 and Figure 6 , other parts are the same as those in Embodiment 1. The difference is that: compared with the conventional centering component 2, either the conveying roller 4 needs to stop for centering to reduce the wear on the side of the plate, or it is realized by rollers, but there is a large gap between the rollers. If the plate has a large inclination, or there are grooves or other structures on both sides of the plate after processing, the plate is likely to get stuck with the rollers and affect the conveying, and seriously damage the machine. Therefore, this embodiment proposes a centering component 2, which includes two support plates 21. The support plates 21 are respectively fixed on both sides of the frame 1. A connecting rod 22 is rotatably connected to the support plates 21. The connecting rod 22 is L-shaped. The bottom of the connecting rod 22 is rotatably connected to a telescopic cylinder 23, and the top is rotatably connected to one end of a first connecting rod 24. The other end of the first connecting rod 24 is rotatably connected to a clamping block 25. The clamping blocks 25 on the two support plates 21 can clamp the plate towards each other; a vertical guide rod 26 is also connected to the bottom of the frame 1. A guide block 27 is sleeved on the guide rod 26. The guide block 27 can slide along the guide rod 26. One end of a second connecting rod 28 is rotatably connected to both sides of the guide rod 26 respectively. The other end of the second connecting rod 28 is connected to one end of a positioning rod 29. The other end of the positioning rod 29 is fixed on the connecting rod 22.

[0030] A through groove 210 is opened in the middle of the clamping block 25 of this embodiment along the conveying direction. A clamping plate 212 is slidably connected horizontally in the through groove 210. Limit grooves 211 are opened on the top plate and the bottom plate of the through groove 210. Corresponding limit blocks 213 are connected to the top and bottom of the clamping plate 212. The limit blocks 213 can slide in the limit grooves 211; a rack 214 is also connected to the top of the clamping plate 212. A gear 215 is rotatably connected to the corresponding clamping block 25. The gear 215 is driven to rotate by a first motor 216 on the clamping block 25. A vertical rod 217 is also arranged on the frame 1. A slider 218 is connected to the vertical rod 217. A sliding groove 219 is opened on the corresponding clamping block 25. The slider 218 can slide in the sliding groove 219.

[0031] Working principle: An infrared sensor can be provided at the front of the centering component 2. When the plate passes by, the telescopic cylinder 23 is activated. The telescopic cylinder 23 drives the connecting rod 22 to rotate, and the connecting rod 22 drives the clamping block 25 to gradually clamp the plate towards the middle. When the plate contacts the clamping plate 212 on the clamping block 25, the telescopic cylinder 23 stops moving. At this time, the clamping plate 212 slides forward following the plate's drive. When it slides to the maximum limit, the telescopic cylinder 23 contracts. At the same time, the first motor 216 drives the gear 215 to rotate to retract the clamping plate 212 into the through groove 210, and then repeats the next stroke.

[0032] Embodiment Three: Please refer to Figures 3-7 , on the basis of Embodiment One, this embodiment further optimizes the flipping component 5, including two flipping shafts 51 rotatably connected to the frame 1. The middle of one flipping shaft 51 is connected to the first flipping rod 52, and the middle of the other flipping shaft 51 is connected to the second flipping rod 54. The first flipping rod 52 and the second flipping rod 54 are arranged back-to-back and offset; a first card slot 53 is opened at the top of the first flipping rod 52, and the first card slot 53 can block the plate conveyed from the cleaning part; a second card slot 55 is opened at the top of the second flipping rod 54, and the second card slot 55 is arranged back-to-back with the first card slot 53. The second card slot 55 can catch the plate that detaches from the first card slot 53 when the first flipping rod 52 rotates to the highest point; the first flipping rod 52 and the second flipping rod 54 are driven to rotate by the driving component 6. Reinforcing rods 56 are also vertically provided on the first flipping rod 52 and the second flipping rod 54 to prevent the plate from slipping.

[0033] The driving component 6 can be driven by gears 215. By setting gears 215 on the two rotating shafts 61 and also setting gears 215 between the two rotating shafts 61, but it will block the connection of the transmission belt 43 between the conveying rollers 4 of the two cleaning parts, so that separate driving motors are set, resulting in waste. At the same time, since the rotation amplitude is not large, it is difficult to control its accuracy through the gear 215 drive, and it is also difficult to control the lowest angle at which the first flipping rod 52 and the second flipping rod 54 drop. For this reason, the driving component 6 proposed in this embodiment includes a rotating shaft 61. The middle of the rotating shaft 61 is connected to a first sprocket 62. The two ends of the rotating shaft 61 are respectively connected to a driving disk 63. Two convex blocks 64 are respectively connected to the two driving disks 63, and the two convex blocks 64 are arranged back-to-back; the bottom of the frame 1 is connected to a fixing plate 65, and a fixing seat 66 is connected to the fixing plate 65. The rotating shaft 61 is rotatably connected to the fixing seat 66, and the fixing seat 66 is arranged between the first sprocket 62 and the driving disk 63; the bottom of the frame 1 is also connected to a driving shaft 67, and the driving shaft 67 is driven to rotate by a second motor on the frame 1; a second sprocket 68 is connected to the driving shaft 67, and the first sprocket 62 and the second sprocket 68 are connected by a transmission chain 69; a first driving rod 610 and a second driving rod 611 are respectively rotatably connected to the two convex blocks 64. The first driving rod 610 is rotatably connected to the first flipping rod 52, and the second driving rod 611 is rotatably connected to the second flipping rod 54.

[0034] During use, after it is detected that the sheet material has fallen onto the first turning rod 52, the second motor and the sprocket drive belt 43 are used to drive the first sprocket 62 to rotate. The first sprocket 62 rotates two weeks to complete one flip of the sheet material. The rotation of the first sprocket 62 drives the rotation of the first drive rod 610 and the second drive rod 611 by driving the drive discs 63 on both sides to rotate, thereby driving the first turning rod 52 and the second turning rod 54 to flip towards each other.

[0035] Embodiment 4: Please refer to Figure 8 , based on Embodiment 1, this embodiment proposes a driving method for the conveying roller 4. The end of the conveying roller 4 is connected to the first driving wheel 41 and the second driving wheel 42. The conveying rollers 4 are connected by a driving belt 43. The driving belt 43 is respectively connected to the first driving wheels 41 of the two conveying rollers 4, and the second driving wheel 42 on the next conveying roller 4 is further connected to the second driving wheel 42 on this conveying roller 4 through the driving belt 43 to achieve driving.

[0036] Embodiment 5: Please refer to Figures 1-8 , this embodiment proposes a method for cleaning the sheet material using this sheet material centering and conveying device, including the following steps: S1. Conveying; the manufactured sheet material is conveyed through the conveying roller 4; S2. Centering; the sheet material is conveyed to the centering part 11 through the conveying roller 4. The telescopic cylinder 23 is started, and the telescopic cylinder 23 drives the clamping blocks 25 to clamp the sheet material towards each other. The sheet material is connected to the clamping plates 212 on the clamping blocks 25, and while the clamping plates 212 slide along with the sheet material, it ensures that the sheet material is centered and conveyed on the conveying roller 4; S3. Primary cleaning; the conveying roller 4 conveys the centered sheet material to the first cleaning part 12, and the front side of the sheet material is cleaned by the cleaning brush 31 arranged on the upper part; S4. Flipping the sheet material; the conveying roller 4 conveys the sheet material onto the first turning rod 52 of the flipping part 13, and the first turning rod 52 and the second turning rod 54 rotate synchronously towards each other to move the sheet material from the first turning rod 52 to the second turning rod 54, realizing the flipping of the sheet material; S5. Secondary cleaning: The end of the sheet material on the second turning rod 54 enters the second cleaning part 14 driven by the conveying roller 4 of the second cleaning part 14, and the back side of the sheet material is cleaned by the cleaning brush 31; S6. Coating; the cleaned sheet material is subjected to a film coating treatment.

[0037] Although the specific implementation manners of the invention are described above in conjunction with the drawings, it is not a limitation to the protection scope of the invention. Based on the technical solutions of the invention, various modifications or deformations that can be made by those skilled in the art without creative efforts are still within the protection scope of the invention.

Claims

1. A sheet centering and conveying device, characterized in that: It includes a frame (1), and the frame (1) is successively divided into an alignment part (11), a first cleaning part (12), a turning part (13), and a second cleaning part (14) along the forward direction; among them, conveying rollers (4) are arranged on the frame (1) of the alignment part (11), the first cleaning part (12), and the second cleaning part (14). An alignment assembly (2) is arranged on the alignment part (11), and the alignment assembly (2) can follow the sheet material and align the sheet material; the conveying roller (4) can convey the sheet material from the alignment part (11) to the first cleaning part (12). The first cleaning part (12) includes a fixed cover (3), the fixed cover (3) is sleeved above the first cleaning part (12), a cleaning brush (31) is arranged inside the fixed cover (3), and the cleaning brush (31) can clean the sheet material conveyed below, and the conveying roller (4) can convey the sheet material from the first cleaning part (12) to the turning part (13). A turning assembly (5) is arranged on the turning part (13), and the turning assembly (5) can turn the sheet material and place it on the conveying roller (4) of the second cleaning part (14). The second cleaning part (14) includes a fixed cover (3), the fixed cover (3) is sleeved above the second cleaning part (14), a cleaning brush (31) is arranged inside the fixed cover (3), and the cleaning brush (31) can clean the turned sheet material below.

2. The sheet centering and conveying device according to claim 1, wherein: The alignment assembly (2) includes two support plates (21), the support plates (21) are respectively fixed on both sides of the frame (1), a connecting rod (22) is rotatably connected to the support plates (21), the connecting rod (22) is L-shaped, the bottom of the connecting rod (22) is rotatably connected to a telescopic cylinder (23), the top is rotatably connected to one end of a first connecting rod (24), the other end of the first connecting rod (24) is rotatably connected to a clamping block (25), and the clamping blocks (25) on the two support plates (21) can clamp the sheet material towards each other; a vertical guide rod (26) is also connected to the bottom of the frame (1), a guide block (27) is sleeved on the guide rod (26), the guide block (27) can slide along the guide rod (26), one end of a second connecting rod (28) is rotatably connected to both sides of the guide rod (26), and the other end of the second connecting rod (28) is connected to one end of a positioning rod (29), and the other end of the positioning rod (29) is fixed on the connecting rod (22).

3. The sheet centering and conveying device according to claim 2, characterized in that: A through groove (210) is opened in the middle of the clamping block (25) along the conveying direction, a clamping plate (212) is horizontally slidably connected in the through groove (210), limiting grooves (211) are opened on the top plate and the bottom plate of the through groove (210), and limiting blocks (213) are connected to the top and the bottom of the corresponding clamping plate (212), and the limiting blocks (213) can slide in the limiting grooves (211). A rack (214) is also connected to the top of the clamping plate (212), a gear (215) is rotatably connected to the corresponding clamping block (25), and the gear (215) is driven to rotate by a first motor (216) on the clamping block (25).

4. The sheet centering and conveying device according to claim 2, wherein: A vertical rod (217) is also arranged on the frame (1), a slider (218) is connected to the vertical rod (217), a sliding groove (219) is opened on the corresponding clamping block (25), and the slider (218) can slide in the sliding groove (219).

5. The sheet centering and conveying device according to claim 1, wherein: The turning assembly (5) comprises two turning shafts (51) rotatably connected to the frame (1), wherein the middle portion of one turning shaft (51) is connected to a first turning rod (52), and the middle portion of the other turning shaft (51) is connected to a second turning rod (54), the first turning rod (52) and the second turning rod (54) being arranged in a staggered manner in opposite directions; a first clamping groove (53) is provided at the top portion of the first turning rod (52), and the first clamping groove (53) can block a plate delivered from the cleaning portion; a second clamping groove (55) is provided at the top portion of the second turning rod (54), and the second clamping groove (55) is arranged in a opposite direction to the first clamping groove (53), and the second clamping groove (55) can receive a plate that is separated from the first clamping groove (53) when the first turning rod (52) rotates to the highest point; the first turning rod (52) and the second turning rod (54) are driven to rotate by the driving assembly (6).

6. The sheet centering and conveying device according to claim 5, wherein: The driving assembly (6) comprises a rotating shaft (61), the middle of the rotating shaft (61) is connected to a first sprocket (62), both ends of the rotating shaft (61) are respectively connected to a driving disk (63), the two driving disks (63) are respectively connected to a protrusion (64), and the two protrusions (64) are arranged in opposite directions; the bottom of the frame (1) is connected to a fixing plate (65), the fixing plate (65) is connected to a fixing seat (66), the rotating shaft (61) is rotatably connected to the fixing seat (66), and the fixing seat (66) is arranged between the first sprocket (62) and the driving disk (63); The bottom of the frame (1) is also connected to a driving shaft (67), and the driving shaft (67) is driven to rotate by a second motor on the frame (1); the driving shaft (67) is connected to a second sprocket (68), and the first sprocket (62) and the second sprocket (68) are connected via a transmission chain (69); the two protrusions (64) are rotatably connected to a first driving rod (610) and a second driving rod (611), respectively; the first driving rod (610) is rotatably connected to a first flip rod (52), and the second driving rod (611) is rotatably connected to the second flip rod (54).

7. A sheet centering and conveying device according to claim 5 or 6, characterized in that: Reinforcement rods (56) are also vertically provided on the first turning rod (52) and the second turning rod (54) to prevent the plate from sliding off.

8. A sheet centering and conveying device according to claim 1, wherein: The ends of the conveying rollers (4) are connected to the first transmission wheel (41) and the second transmission wheel (42). The conveying rollers (4) are connected to each other via a transmission belt (43). The transmission belts (43) are respectively connected to the first transmission wheels (41) of the two conveying rollers (4). The second transmission wheel (42) on the next conveying roller (4) is then connected to the second transmission wheel (42) on the conveying roller (4) via the transmission belt (43) to achieve transmission.

9. A method for cleaning a sheet using the sheet centering and conveying device according to any one of claims 1-8, characterized in that The following steps are involved: S1. Conveying; the manufactured sheet is conveyed through a conveying roller (4); S2. Centering; the plate is transported to the centering portion (11) through the conveying roller (4), the telescopic cylinder (23) is started, the telescopic cylinder (23) drives the clamping block (25) to clamp the plate, the plate is connected to the clamping plate (212) on the clamping block (25), and the clamping plate (212) slides with the plate while ensuring that the plate is transported in the center on the conveying roller (4); S3. One cleaning; the conveyor roller (4) conveys the centered plate to the first cleaning section (12), and cleans the front of the plate by a cleaning brush (31) disposed at the upper portion; S4. Flip the sheet; the conveying roller (4) conveys the sheet onto the first turning rod (52) of the turning part (13), and the first turning rod (52) and the second turning rod (54) rotate towards each other synchronously to move the sheet from the first turning rod (52) to the second turning rod (54), realizing the flipping of the sheet; S5. Secondary cleaning: The end of the sheet on the second turning rod (54) enters the second cleaning part (14) driven by the conveying roller (4) of the second cleaning part (14), and the back of the sheet is cleaned by the cleaning brush (31); S6. Coating; perform film covering treatment on the cleaned sheet.

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