Edge covering device

Abstract

The utility model provides an edge covering device, and relates to the technical field of solar cell preparation. The edge covering device can comprise a transmission assembly, at least one edge covering assembly and at least one position adjusting assembly. The transmission assembly is used for transmitting the target object to a preset position. The at least one edge covering assembly is arranged on one side of the conveying assembly, each edge covering assembly comprises a first roller with an ink layer, and the first rollers move to the ink layers in a controlled mode to make contact with the edges of the target objects, so that the edges of the target objects are coated with ink. Each position adjusting assembly is arranged below one edge covering assembly and used for supporting and adjusting the position of the corresponding edge covering assembly. Wherein the edge covering assembly is detachably connected with the position adjusting assembly. The edge covering assembly can be quickly disassembled to adjust the position, change the size of a roller or clean, pollution to an equipment table top is avoided, and the problems that the production efficiency is affected by difficult disassembly and the edge covering assembly is difficult to adjust to the specified precision are also avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to solar cell preparation technical field, in particular to a kind of edge covering device. BACKGROUND

[0002] In recent years, photovoltaic cell technology is driven by cost reduction and profit increase, and copper electroplating patterning is a new technology to solve the problem of excessive silver consumption in current cells. The purpose is to replace the existing silver grid line with a copper grid line. The edge covering is to cover a layer of protective ink on the edge of the silicon wafer, which can protect the copper grid line on the edge of the silicon wafer from falling off during copper plating. At the same time, the line width of the edge covering needs to be controlled, which is currently between 0.3-0.5mm. In copper electroplating technology, ink edge covering of silicon wafer is one of the important technologies.

[0003] The rollers of the existing edge covering mechanism are fixedly installed on the roller driving group and cannot be detached. When the operator needs to replace the silicon wafer size, the corresponding edge covering roller needs to be replaced. The time-consuming disassembly, assembly and cleaning of the edge covering roller affect the production efficiency and make it difficult to adjust to the specified precision. SUMMARY

[0004] One object of the first aspect of the utility model is to provide an edge covering device to solve the problem of time-consuming disassembly and cleaning of the edge covering device in the prior art.

[0005] In particular, the utility model provides an edge covering device, comprising:

[0006] A conveying assembly for conveying a target object to a predetermined position;

[0007] At least one edge covering assembly is arranged on one side of the conveying assembly. Each edge covering assembly comprises a first roller with an ink layer. The first roller is controlled to move to contact the ink layer with the edge of the target object, thereby coating the edge of the target object with ink.

[0008] At least one position adjusting assembly is arranged below each edge covering assembly for supporting and adjusting the position of the corresponding edge covering assembly. The edge covering assembly and the position adjusting assembly are detachably connected.

[0009] Optionally, it further comprises a supporting assembly for detachably connecting the edge covering assembly to the position adjusting assembly. The supporting assembly comprises a quick release structure, which allows the supporting assembly and the position adjusting assembly to be quickly detached.

[0010] Optionally, the edge covering assembly further comprises an ink supply assembly detachably connected to one side of the first roller to provide ink for the first roller.

[0011] Optionally, the position adjusting assembly comprises:

[0012] a lateral adjusting member for adjusting the position of the first roller in the direction along which the axis of the first roller extends;

[0013] a longitudinal adjusting member for adjusting the position of the first roller in the direction perpendicular to the direction along which the axis of the first roller extends; and

[0014] an angle adjusting member for adjusting the angle of the first roller.

[0015] Optionally, each of the edge covering assemblies further comprises a doctor blade, which is arranged on one side of the first roller, and the direction along which the doctor blade extends is parallel to the axis of the first roller, and the distance between the blade edge of the doctor blade and the outer surface of the first roller is a preset distance, so that the ink outside the first roller forms an ink layer with a thickness of the preset distance when the first roller rotates.

[0016] Optionally, each of the edge covering assemblies further comprises a second roller, which is arranged on one side of the first roller in parallel, and the distance between the first roller and the second roller is a preset distance, so that the ink outside the first roller forms an ink layer with a thickness of the preset distance by the second roller when the first roller rotates.

[0017] Optionally, the apparatus further comprises:

[0018] a homing assembly arranged on one side of the conveying assembly, which is controlled to move to the target object at the preset position, thereby homing the target object;

[0019] The homing assembly comprises:

[0020] a first driving mechanism comprising an output end;

[0021] at least one set of two oppositely arranged linkage assemblies, each of which comprises a linkage and a homing member, one end of each of the linkages is rotatably connected to the output end of the first driving mechanism, and the other end is rotatably connected to the homing member, so that when the output end of the first driving mechanism rotates, the two homing members in the same linkage assembly are brought closer to or farther away from each other by the linkage.

[0022] Optionally, the homing assembly further comprises a support plate provided with a sliding block;

[0023] Each of the correcting members comprises a connecting plate and a correcting column, a sliding groove matched with the sliding block is arranged at the connecting plate, one end of the connecting plate is rotationally connected with the connecting rod, and the other end is fixedly connected with the correcting column, so that when the connecting rod pulls the connecting plate, the connecting plate moves along the sliding groove, and the correcting column moves along the extending direction of the sliding groove.

[0024] Optionally, a lifting assembly is further included, and the lifting assembly is used to drive the correcting assembly to move up and down.

[0025] The lifting assembly comprises:

[0026] A gantry frame;

[0027] A second driving mechanism is arranged at the gantry frame, and the second driving mechanism is connected with the correcting assembly to move up and down under the driving of the second driving mechanism.

[0028] Optionally, each of the edge covering assemblies further comprises a third driving mechanism, and the third driving mechanism is used to drive the first roller to reciprocate along a preset direction to approach or move away from the target object.

[0029] The edge covering assembly of the scheme is arranged above the position adjusting assembly, and the position adjusting assembly is detachably connected with the edge covering assembly, so that the edge covering assembly can be quickly disassembled, adjusted in position, replaced in size or cleaned, pollution of the equipment table is avoided, and production efficiency is not affected by difficult disassembly and adjustment to the specified accuracy.

[0030] The correcting assembly of the scheme can comprise a first driving mechanism and at least one set of two connecting rod assemblies arranged oppositely, the connecting rod assemblies are driven by the first driving mechanism, and the two opposite side edges of the target object are corrected by the connecting rod assemblies, so that the target object can be matched with the position of the roller.

[0031] The above and other objects, advantages and features of the present application will become more apparent from the following detailed description of some embodiments thereof, taken in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0032] Some specific embodiments of the present application will be described in detail below with reference to the accompanying drawings, which are presented by way of illustration and not of limitation. The same reference numbers in the drawings indicate the same or similar components or parts. Those skilled in the art should understand that the drawings are not necessarily drawn to scale. In the drawings:

[0033] Figure 1 is a schematic perspective view of a slurry coating device according to one specific embodiment of the present application;

[0034] Figure 2is a schematic perspective view of the edge covering assembly arranged at the position adjusting assembly according to one specific embodiment of the present application;

[0035] Figure 3 is a schematic perspective view of the edge covering assembly arranged separately from the position adjusting assembly according to one specific embodiment of the present application;

[0036] Figure 4 is a schematic perspective view of the first roller and the second roller according to one specific embodiment of the present application;

[0037] Figure 5 is a schematic perspective view of the aligning assembly and the lifting assembly according to one specific embodiment of the present application;

[0038] Figure 6 is a bottom view of the aligning assembly and the lifting assembly according to one specific embodiment of the present application;

[0039] Figure 7 is a schematic perspective view of the conveying assembly according to one specific embodiment of the present application.

[0040] BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Edge covering device - 100; conveying assembly - 200; synchronous wheel - 210; synchronous belt - 220; driving mechanism - 230;

[0042] Aligning assembly - 300; first driving mechanism - 310; output end - 311; connecting rod assembly - 320; connecting rod - 321; aligning piece - 322; connecting plate - 3221; aligning column - 3222; sliding groove - 3223; support plate - 330; sliding block - 331;

[0043] Edge covering assembly - 400; first roller - 410; scraper - 420; micrometer - 430; arc-shaped waist hole - 440; gear assembly - 450; driving motor - 460; support assembly 470; quick release structure - 471; support plate - 472; second roller - 480; gear - 481;

[0044] Lifting assembly - 600; gantry - 610; second driving mechanism - 620;

[0045] Position adjusting assembly - 700; first support plate - 711; first waist hole - 712; second support plate - 721; second waist hole - 722; third support plate - 731; third waist hole - 732;

[0046] Third driving mechanism 800;

[0047] Ink supply assembly - 900. DETAILED DESCRIPTION

[0048] In the description of the embodiments, it needs to be understood that the terms "length", "width", "height", "upper", "lower", "left", "right", "vertical", "horizontal", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0049] As a specific embodiment of the utility model, as shown in Figure 1 and Figure 2 , the embodiment provides a covering device 100, which can include a conveying assembly 200, at least one covering assembly 400 and at least one position adjusting assembly 700. Among them, the conveying assembly 200 is used to convey the target object to the preset position. At least one covering assembly 400 is arranged on one side of the conveying assembly 200, and each covering assembly 400 includes a first roller 410 with an ink layer. The first roller 410 is controlled to move to the ink layer to contact the edge of the target object after being ruled, so as to coat the edge of the target object with ink. Each position adjusting assembly 700 is arranged below one of the covering assemblies 400, which is used to support and adjust the position of the corresponding covering assembly 400. Among them, the covering assembly 400 and the position adjusting assembly 700 are detachably connected.

[0050] Specifically, the covering device 100 of the embodiment can include a conveying assembly 200, at least one covering assembly 400 and at least one position adjusting assembly 700. The conveying assembly 200 conveys the target object to the preset position. The covering assembly 400 can include a first roller 410, and the first roller 410 has an ink layer. When the first roller 410 is controlled to move to the target object, the ink layer contacts the target object, so that the edge of the target object is coated with ink, and the target object is covered. The covering assembly 400 of the embodiment is arranged above the position adjusting assembly 700, and the position adjusting assembly 700 and the covering assembly 400 are detachably connected, so that the covering assembly 400 can be quickly disassembled, adjusted in position, replaced in size or cleaned, avoiding pollution of the equipment table, and avoiding difficult disassembly affecting production efficiency and being difficult to adjust to the specified accuracy.

[0051] As a specific embodiment of the utility model, the covering device 100 of the embodiment can further include a supporting assembly 470, which detachably connects the covering assembly 400 to the position adjusting assembly 700. The supporting assembly 470 includes a quick release structure 471, which enables the supporting assembly 470 and the position adjusting assembly 700 to be quickly disassembled.

[0052] Specifically, the support assembly 470 in the embodiment can include a support plate 472 and a quick release structure 471, wherein the first roller 410 is arranged on the support plate, and the quick release structure is arranged between the support plate 472 and the position adjusting assembly 700. The quick release structure 471 in the embodiment can be a structure that can connect and quickly release two objects in the prior art, and the specific structure is not limited herein. Specifically, the quick release structure 471 used in the embodiment can include a shaft sleeve with a through hole, a push rod with a protrusion at an end, the shaft sleeve is arranged on the support plate, and the protrusion passes through the through hole. A groove matched with the protrusion is arranged at the position adjusting assembly 700. When the support assembly and the position adjusting assembly 700 are connected with each other, the protrusion is matched with the groove. When quick release is needed, the push rod of the quick release structure 471 is pressed, the protrusion is inwardly retracted, so that it is pulled out of the groove, and the support assembly 470 and the position adjusting assembly 700 are separated from each other, thereby being disassembled.

[0053] According to one specific embodiment of the utility model, the position adjusting assembly 700 in the embodiment can include a lateral adjusting member, a longitudinal adjusting member, and an angle adjusting member. The lateral adjusting member is used to adjust the position of the roller 410 in the direction along the axis of the roller 410. The longitudinal adjusting member is used to adjust the position of the first roller 410 in the direction along the vertical axis. The angle adjusting member 730 is used to adjust the angle of the roller 410.

[0054] Specifically, each adjusting member in the embodiment includes a corresponding support plate and an adjusting device arranged on the support plate. For example, the lateral adjusting member includes a first support plate 711 and a first adjusting device, and the first support plate is provided with a first waist hole 712 extending laterally. The longitudinal adjusting member includes a second support plate 721 and a second adjusting device. The second support plate 721 is provided with a second waist hole 722 extending longitudinally. The angle adjusting member can include a third support plate 731 and a third adjusting device. The third support plate 731 is provided with a third waist hole 732 in the shape of an arc. Specifically, the adjusting device can be an adjusting bolt. When the corresponding support plate is adjusted to a predetermined position, the adjusting bolt is fixed after passing through the waist hole, thereby fixing the position and angle of the first roller 410.

[0055] Specifically, the first support plate 711, the second support plate 721, and the third support plate 731 are arranged in sequence from top to bottom, but the order is not limited.

[0056] Each of the edge covering assemblies 400 can further include a scraper 420 arranged on one side of the first roller 410, and the extending direction of the scraper 420 is parallel to the axis of the first roller 410, and the cutting edge of the scraper 420 is away from the outer surface of the first roller 410 by a predetermined distance, so that the ink with a predetermined thickness is formed on the slurry outside the first roller 410 when the first roller 410 rotates.

[0057] The length of the first roller 410 matches the length of the edge of the target object, and the shape of the outer surface of the first roller 410 can match the shape of the edge of the target object. The scraped shape matches the shape of the outer surface of the first roller 410.

[0058] Specifically, the two side edges of the scraper 420 can be provided with the micrometer 430 for adjusting the distance between the scraper 420 and the roller 410. In addition, the two side edges of the scraper 420 of the embodiment can be further provided with the arc-shaped waist-shaped hole 440, so as to adjust the angle of the scraper 420, so that the scraper 420 is as parallel as possible to the axial direction of the roller 410.

[0059] One end of the first roller 410 of the embodiment is provided with a gear assembly 450, which is driven to rotate by a driving motor 460, thereby driving the first roller 410 to rotate.

[0060] In the embodiment, the scraper 420 is provided with a mounting position for mounting the ink supply assembly 900, and the ink supply assembly 900 and the scraper 420 are connected to each other by magnetic attraction, so that the ink supply assembly 900 and the scraper can be quickly disassembled, and the ink supply assembly 900 is convenient for cleaning. The ink supply nozzle of the ink supply assembly 900 faces the first roller 410, thereby providing ink for the first roller 410.

[0061] As another specific embodiment of the utility model, each of the edge covering assemblies 400 of the embodiment can further include a second roller 480, which is arranged in parallel on one side of the first roller 410, and the first roller 410 and the second roller 480 are separated by a predetermined distance, so that when the first roller 410 rotates, the ink outside the first roller 410 is formed into an ink with the same thickness as the predetermined distance by the second roller 480.

[0062] Specifically, the end portions of the first roller 410 and the second roller 480 are connected to each other by two gears 481, and the first roller 410 drives the second roller 480 to rotate when rotating. The outer surfaces of the first roller 410 and the second roller 480 are separated by a predetermined distance. When the first roller 410 and the second roller 480 rotate relative to each other, the surface of the first roller 410 can be coated with ink with the same thickness as the predetermined distance.

[0063] In the embodiment, the ink supply assembly 900 is arranged on the side edge of the first roller 410, and is detachably connected to the end portion of the first roller 410, so that the ink supply assembly 900 is convenient for disassembly and cleaning. The ink supply nozzle of the ink supply assembly 900 faces the first roller 410, thereby providing ink for the first roller 410.

[0064] Specifically, the edge covering assembly 400 of the embodiment can be provided with one, two or four. The edge covering assembly 400 of the embodiment is provided with two, and the two edge covering assemblies 400 are oppositely arranged, and the target object is aligned. The edge covering assembly 400 is controlled to approach the target object, and the two opposite sides of the target object are in contact with one of the first rollers 410 respectively, so as to coat the two opposite sides with ink, and then cover the two opposite sides. Of course, if it is required to cover the four edges of the target object, the two opposite sides can be coated first, and then the target object is rotated to coat the other opposite side. When the edge covering assembly 400 is provided with one, the target object can be rotated three times to coat each side of the target object. When the edge covering assembly 400 is provided with four, the target object only needs to be driven by the four edge covering assemblies 400 once to be in contact with the sides of the target object, so that the four edges of the target object can be coated with ink, and then the four edges of the target object can be covered.

[0065] Of course, the shape of the first roller 410 of the embodiment matches the shape of the side of the target object, so that the outer side of the target object can be covered.

[0066] As a specific embodiment of the utility model, each of the edge covering assemblies of the embodiment can further include a third driving mechanism 800 for driving the first roller 410 to reciprocate along a predetermined direction to approach or move away from the target object. Specifically, the target object of the embodiment is generally placed horizontally, and the two edge covering assemblies 400 approach the target object under the driving of the first driving mechanism 310, so that the edges of the target object can be inserted into the ink, and the ink can be wrapped around the edges of the target object. Generally, in order to make the thickness or width of the edges of the target object wrapped on both sides consistent, the plane on which the target object is located passes through the central axis of the first roller 410.

[0067] As a specific embodiment of the utility model, as shown in Figure 3 and Figure 4 The alignment assembly 300 of the embodiment can include a first driving mechanism 310 and at least one set of two oppositely arranged connecting rod assemblies 320. The first driving mechanism 310 can include an output end 311. Each connecting rod assembly 320 can include a connecting rod 321 and an alignment piece 322, one end of each connecting rod 321 is rotatably connected to the output end 311 of the first driving mechanism 310, and the other end is rotatably connected to the alignment piece 322, so that when the output end 311 of the first driving mechanism 310 rotates, the two alignment pieces 322 in the same connecting rod assembly 320 are brought closer to or farther away from each other through the connecting rod 321.

[0068] Specifically, the alignment assembly 300 of the embodiment can include a first driving mechanism 310 and at least one set of two link assemblies 320 arranged oppositely, the link assemblies 320 are driven by the first driving mechanism 310, and then the two opposite sides of the target object are aligned by the link assemblies 320, so that the target object can be matched with the position of the roller 410.

[0069] Specifically, the alignment assembly 300 of the embodiment can include a link 321 and an alignment piece 322, the link 321 is driven by the first driving mechanism 310 to move, and then the alignment piece 322 is driven to move. In the alignment assembly 300 of the embodiment, four links 321 and four alignment pieces 322 can be arranged at the output end 311 of the first driving mechanism 310, and two links 321 and two alignment pieces 322 are arranged oppositely. When the two opposite links 321 are driven by the first driving mechanism 310 to move, the two opposite alignment pieces 322 corresponding to the two opposite links 321 move away from each other or move close to each other, so that the corresponding opposite sides of the target object can be aligned. The four links 321 and the four alignment pieces 322 can align the four edges of the target object.

[0070] As a specific embodiment of the present application, the alignment assembly 300 of the embodiment can further include a support plate 330 provided with a sliding block 331. Each alignment piece 322 can include a connecting plate 3221 and an alignment column 3222, and the connecting plate 3221 is provided with a sliding groove 3223 matched with the sliding block 331. One end of the connecting plate 3221 is rotatably connected with the link 321, and the other end is fixedly connected with the alignment column 3222, so that when the connecting plate 3221 is pulled by the link 321, the connecting plate 3221 moves along the sliding groove 331, and the alignment column 3222 moves along the extension direction of the sliding groove 331.

[0071] Specifically, the support plate 330 of the embodiment can support the connecting plate 3221 and the alignment column 3222, and each alignment piece 322 can include two alignment columns 3222 arranged side by side, the alignment columns 3222 are vertically arranged and abut against the edges of the target object. The sliding block 331 on the support plate 330 and the sliding groove 3223 on the connecting plate 3221 are matched with each other, the link 321 is rotatably connected with the connecting plate 3221, and when the link 321 moves under the driving of the first driving mechanism 310, the connecting plate 3221 and the alignment column 3222 reciprocate along the direction of the sliding groove 3223. The sliding grooves 3223 on the two opposite support plates 330 are parallel to each other, and the alignment columns 3222 can move close to each other or move away from each other, so as to align the target object.

[0072] As a specific embodiment of the present application, Figures 1-3As shown, the edge covering device 100 of the embodiment can further comprise a lifting assembly 600. The lifting assembly 600 is used to drive the correcting assembly 300 to move up and down. The lifting assembly 600 can comprise a gantry 610 and a second driving mechanism 620. The second driving mechanism 620 is arranged at the gantry 610. The second driving mechanism 620 is connected with the correcting assembly 300 to move up and down under the driving of the second driving mechanism 620.

[0073] Specifically, the lifting assembly 600 of the embodiment can comprise the second driving mechanism 620, which drives the correcting assembly 300 to move up and down, so that when the target object is transported to the position below the correcting assembly 300 by the conveying assembly 200, the second driving mechanism 620 drives the correcting assembly 300 to move downward to the target object and corrects the target object, and then drives the correcting assembly 300 to move upward to wait for the next correction of the target object.

[0074] Specifically, the conveying assembly 200 of the embodiment can comprise a synchronous wheel 210 and a synchronous belt 220. The synchronous wheel 210 rotates under the driving of the driving mechanism 230, and the synchronous belt 220 is sleeved on the synchronous wheel 210 and moves with the synchronous wheel 210. When the target object reaches the synchronous belt 220 from one side, the synchronous belt 220 moves to drive the target object to move and then reaches the middle position of the synchronous belt 220.

[0075] When the target object reaches the middle position, the lifting assembly 600 drives the correcting assembly 300 to move to the position of the target object, and the target object is corrected by the correcting assembly 300. After the completion, the lifting assembly 600 moves away from the target object. The third driving mechanism 800 drives the first roller 410 of the edge covering assembly 400 to move close to the target object, so that the target object contacts the ink on the first roller 410, and then the edge of the target object is coated with ink. After the completion, the first roller 410 of the edge covering assembly 400 is driven to move away from the edge covering assembly 400.

[0076] At this point, those skilled in the art should recognize that although the present application has been shown and described in detail in the above embodiments, many other variations or modifications can be determined or deduced directly according to the disclosure of the present application without departing from the spirit and scope of the present application. Therefore, the scope of the present application should be understood and recognized as covering all these other variations or modifications.

Claims

1. A hemming apparatus characterized by, The edge covering device comprises: a conveying assembly for conveying a target object to a preset position; at least one edge covering assembly arranged at the side of the conveying assembly, each of the edge covering assemblies comprising a first roller with an ink layer, the first roller being controlled to move to the ink layer to contact the edge of the target object, so as to coat the edge of the target object with ink; and at least one position adjusting assembly arranged below each of the edge covering assemblies for supporting and adjusting the position of the corresponding edge covering assembly; wherein the edge covering assembly and the position adjusting assembly are detachably connected.

2. The edge covering device according to claim 1, wherein the edge covering assembly further comprises an ink supply assembly detachably connected to one side of the first roller for supplying ink to the first roller.

3. The edge covering device according to claim 1, wherein it further comprises a supporting assembly for detachably connecting the edge covering assembly to the position adjusting assembly; the supporting assembly comprises a quick release structure for enabling quick disconnection between the supporting assembly and the position adjusting assembly.

4. The edge covering device according to claim 1, wherein the position adjusting assembly comprises: a lateral adjusting member for adjusting the position of the first roller in the direction along the axis of the first roller; a longitudinal adjusting member for adjusting the position of the first roller in the direction perpendicular to the axis of the first roller; and an angle adjusting member for adjusting the angle of the first roller.

5. The edge covering device according to any one of claims 1-4, wherein each of the edge covering assemblies further comprises a scraper arranged at one side of the first roller, the scraper extending in a direction parallel to the axis of the first roller, and the blade of the scraper being spaced apart from the outer surface of the first roller by a preset distance, so that the paste outside the first roller forms an ink layer with a thickness of the preset distance when the first roller rotates.

6. The edge covering device according to any one of claims 1-4, wherein each of the edge covering assemblies further comprises a second roller arranged at one side of the first roller in parallel, the first roller and the second roller being spaced apart by a preset distance, so that the ink outside the first roller forms an ink layer with a thickness of the preset distance by the second roller when the first roller rotates.

7. The edge covering device according to any one of claims 1-4, wherein it further comprises: a correcting assembly arranged at one side of the conveying assembly, the correcting assembly being controlled to move to the target object at the preset position, so as to correct the target object; the correcting assembly comprising: a first driving mechanism comprising an output end; at least one set of two oppositely arranged link assemblies, each of the link assemblies comprising a link and a correcting member, one end of each of the links being rotatably connected to the output end, and the other end being rotatably connected to the correcting member, so that the two oppositely arranged correcting members are brought closer to or farther away from each other by the link when the output end rotates.

8. The device of claim 7, wherein, the correcting assembly further comprises a sliding block and a supporting plate; each of the correcting members comprises a connecting plate and a correcting column, the connecting plate is provided with a sliding groove matched with the sliding block, one end of the connecting plate is rotationally connected with the connecting rod, and the other end is fixedly connected with the correcting column, so that when the connecting rod pulls the connecting plate, the connecting plate moves along the sliding groove, and the correcting column moves along the extending direction of the sliding groove.

9. The device of claim 7, wherein, a lifting assembly is further arranged to drive the correcting assembly to move up and down; the lifting assembly comprises: a portal frame; a second driving mechanism arranged on the portal frame, and connected with the correcting assembly to drive the correcting assembly to move up and down.

10. The device of any one of claims 1-4, wherein, each of the edge covering assemblies further comprises a third driving mechanism for driving the first roller to reciprocate along a preset direction to approach or move away from the target object.

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