CN218966157U

CN218966157U - Film feeding mechanism

Info

Publication number: CN218966157U
Application number: CN202320025030.2U
Authority: CN
Inventors: 金一峰; 殷晟旻; 陈强; 金国锋; 刘海宏
Original assignee: Suzhou Hengwu Auto Parts Technology Co ltd
Current assignee: Suzhou Hengwu Auto Parts Technology Co ltd
Priority date: 2023-01-05
Filing date: 2023-01-05
Publication date: 2023-05-05
Anticipated expiration: 2033-01-05

Abstract

The utility model discloses a film feeding mechanism which comprises a workbench, wherein a product is placed on the workbench. One side of the workbench along the length direction is provided with a film feeding device, and the film feeding device is used for separating a film from a protective film stuck on the back of the film and smoothly conveying the separated film to the position right above the workbench. The workbench is connected with a film pulling device in a sliding manner, and the film pulling device can be driven by the displacement device to approach or be far away from the film feeding device along the length direction of the workbench. The film pulling device is used for clamping the separated adhesive film and is driven by the displacement driving device to be far away from the film feeding device so as to spread the adhesive film. Can realize the automatic smooth feeding of the adhesive film.

Description

Film feeding mechanism

Technical Field

The utility model relates to the technical field of high-temperature high-pressure vacuum film coating machines, in particular to a film feeding mechanism.

Background

The high-temperature high-pressure vacuum film coating machine is used for coating a layer of film on one side surface of the product, and the film coating is performed in a high-temperature high-pressure vacuum environment so as to improve the compactness and flatness of the product and the film. The product after being coated with the film has higher aesthetic degree and wider application on automobiles.

The high-temperature high-pressure vacuum laminating machine generally comprises a machine table and a transfer device, wherein a mold carrying table is arranged on the machine table, a product is placed on the mold carrying table, a glue film is pasted on the surface of the product, the transfer device can move downwards to press the glue film on the product, the product and the glue film are in a high-temperature high-pressure environment in the pressing process, the high-temperature ensures that the hot melt adhesive of the glue film is melted and fixed on the surface of the product, the high-pressure ensures that the glue film is tightly attached to the product, and the flatness of the glue film in the process influences the final laminating effect. The existing adhesive film is stretched and flattened by manual pulling in the feeding process, and is time-consuming and labor-consuming. Even some automatic film feeding mechanisms, the pulled adhesive film is often not high in flatness, and the film coating requirement cannot be met.

Disclosure of Invention

In order to overcome the defects, the utility model aims to provide a film feeding mechanism which can realize the smooth feeding of adhesive films.

In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a go up membrane mechanism, includes the workstation, send the membrane device to set up in one side of workstation along length direction, send the membrane device to include separation subassembly and flattening conveying assembly, separation subassembly is used for separating glued membrane and protection film, the flattening conveying assembly is used for the flattening glued membrane and carries the glued membrane to the workstation. And the film pulling device can slide along the length direction of the workbench and is used for clamping and leveling the separated adhesive films conveyed by the conveying assembly, and the film pulling device expands the adhesive films when being far away from the film conveying device.

The utility model has the beneficial effects that: the separation assembly separates the adhesive film from the protective film, and the adhesive film after separation is leveled by the leveling conveying assembly and then conveyed to the upper part of the workbench. The product is placed from on the workstation, draws the membrane device to remove towards flattening conveying assembly this moment, the tip of centre gripping glued membrane, then draws membrane device pulling glued membrane to keep away from flattening conveying assembly, and glued membrane is smooth to be located the product top, has realized the automatic feeding of glued membrane.

Further, the leveling conveying assembly comprises a driving roller and a driven roller which are arranged at an upper and lower interval, the axes of the driving roller and the driven roller are parallel, the distance between the driving roller and the driven roller is adjustable, the adhesive film passes through the space between the driving roller and the driven roller, the driving roller rotates under the driving of the conveying driving piece, and the driven roller can move up and down under the driving of the distance adjusting driving piece. The adhesive film passes through the space between the driving roller and the driven roller, the adhesive film is clamped by the driving roller and the driven roller, and when the conveying driving piece drives the driving roller to rotate, the adhesive film is driven to move under the driving of friction force. When the film pulling device clamps the adhesive film and drives the adhesive film to move, the driven roller moves downwards under the drive of the distance-adjusting driving piece and is far away from the driving roller, the driving roller and the driven roller do not clamp the adhesive film any more, and therefore no moving force is applied to the adhesive film, and the film pulling device pulls the adhesive film to move. However, in the process, the distance between the driving roller and the driven roller still plays a role in guiding and leveling the adhesive film.

Further, the separation assembly comprises a feeding roller, a recovery roller and two separation rollers, the feeding roller and the recovery roller are driven by rotary driving pieces which are correspondingly arranged to reversely rotate along the axis of the feeding roller and the recovery roller, the two separation rollers are positioned between the feeding roller and the leveling conveying assembly, and the adhesive film and the protective film pass through the two separation rollers and are separated at the two separation rollers. The feeding roller and the recovery roller realize synchronous uncoiling and coiling, the feeding roller is wound with a glue film and a protective film before separation, and the recovery roller is wound with a protective film after separation. The adhesive film is conveyed to the leveling conveying assembly after passing through the two separating rollers, and the protective film is wound on the recovery roller for recovery after passing through the two separating rollers.

Furthermore, the driving roller is sleeved with an anti-slip sleeve made of rubber, and the smooth surface of the adhesive film is abutted against the anti-slip sleeve, so that the friction force between the adhesive film and the adhesive film is improved, and the adhesive film is conveyed. The surface of the driven roller is provided with the smooth sleeve made of teflon, the back adhesive surface of the adhesive film is abutted with the smooth sleeve, the smoothness is improved, and the back adhesive surface is prevented from being attached to the smooth sleeve, so that the adhesive film is folded.

Further, the workbench is also provided with a displacement device, the film pulling device is connected with the displacement device, and the displacement device is used for driving the film pulling device to reciprocate along a straight line.

Furthermore, the displacement device comprises two transmission chains which synchronously rotate and are of a closed-loop structure, the two transmission chains are positioned on two sides of the width direction of the workbench, the two transmission chains synchronously rotate under the drive of a displacement driving piece, and the film pulling device is fixed on the transmission chains. And the stable movement of the film pulling device is realized in the form of symmetrical transmission chains.

Further, the film pulling device comprises a connecting frame extending along the width direction of the workbench, the connecting frame is fixed on a transmission chain through fixing plates on two sides, a plurality of groups of clamping jaws are arranged on one side of the connecting frame, which faces the film feeding device, each group of clamping jaws comprises two clamping plates which are arranged at intervals up and down and have adjustable intervals, and the adhesive film can be clamped between the two clamping plates.

Further, an upper guide wheel positioned above the workbench and a lower guide wheel positioned below the workbench are further arranged on the fixed plate, and the upper guide wheel and the lower guide wheel are respectively abutted with the upper end face and the lower end face of the workbench. The upper guide wheel and the lower guide wheel provide guide for the movement of the film drawing device from the upper surface and the lower surface, so that the stability of the movement of the film drawing device is improved.

Furthermore, one side of the workbench far away from the leveling conveying assembly is also provided with a film pressing device, the film pressing device comprises a pressing plate and a film pressing driving piece, and the pressing plate is positioned above the workbench and can move up and down under the driving of the film pressing driving piece. The film pulling device can move to one side, far away from the leveling conveying assembly, of the film pressing device, at the moment, the adhesive film is unfolded, one end of the adhesive film is wound on the feeding roller, the other end of the adhesive film is a free end, and the adhesive film is clamped on the film pulling device. At this time, the pressing plate moves downwards, the free end of the adhesive film is pressed on the workbench, and the adhesive film is fixed.

Furthermore, one side of the workbench, which is close to the leveling conveying assembly, is further provided with a guide assembly, the guide assembly comprises a lower plate and an upper plate, the lower plate and the upper plate are arranged at intervals, the adhesive film passes through the upper plate and the lower plate, the lower plate and the upper plate are provided with a yielding groove which is correspondingly arranged with a clamping plate, and the clamping plate can be inserted into the yielding groove and clamp the part of the adhesive film, which is positioned in the yielding groove. The guide assembly can be used for pressing down the adhesive film on one hand and guiding the position of the clamping plate on the other hand, so that the accuracy of clamping the adhesive film by the clamping plate is improved.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of the present utility model;

FIG. 2 is a side view of an embodiment of the present utility model;

FIG. 3 is an enlarged view at A in FIG. 2;

FIG. 4 is a schematic view showing a connection state of the leveling and conveying assembly and the workbench according to the embodiment of the utility model;

FIG. 5 is an enlarged view at B in FIG. 4;

FIG. 6 is a schematic diagram illustrating a connection state between a displacement apparatus and a workbench according to an embodiment of the utility model;

FIG. 7 is a schematic view of a separating assembly according to an embodiment of the present utility model;

fig. 8 is a schematic structural view of a guide assembly according to an embodiment of the present utility model.

In the figure:

1. a work table; 2. a film pulling device; 21. a connecting frame; 22. a fixing plate; 23. a fixed clamping plate; 24. moving the clamping plate; 25. clamping the driving member; 26. an upper guide wheel; 27. a lower guide wheel; 3. a displacement device; 31. a transmission chain; 32. a displacement driving member; 33. a drive sprocket; 34. a driven sprocket; 35. a transmission rod; 36. a tensioning wheel; 4. a separation assembly; 41. a feeding roller; 42. a recovery roller; 43. a separation roller; 5. leveling the conveying assembly; 51. a drive roll; 52. driven roller; 53. a distance-adjusting driving member; 54. a vertical plate; 55. a conveying driving member; 6. a film pressing device; 61. a pressing plate; 62. a film pressing driving member; 7. a guide assembly; 71. a lower plate; 72. an upper plate; 73. a relief groove; 81. a cutting knife; 82. cutting the driving member.

Detailed Description

The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings so that the advantages and features of the present utility model can be more easily understood by those skilled in the art, thereby making clear and defining the scope of the present utility model.

Referring to fig. 1 and 2, a film feeding mechanism of the present utility model includes a table 1, and a product is placed on the table 1. One side of the workbench 1 along the length direction is provided with a film feeding device, and the film feeding device is used for separating a film from a protective film stuck on the back of the film and smoothly conveying the separated film to the position right above the workbench 1. The workbench 1 is connected with a film pulling device 2 in a sliding manner, and the film pulling device 2 can be driven by the displacement device 3 to approach or be far away from the film feeding device along the length direction of the workbench 1. The film pulling device 2 is used for clamping the separated adhesive film and is driven by the displacement driving device to be far away from the film feeding device so as to spread the adhesive film.

The film feeding device comprises a separating assembly 4 and a leveling and conveying assembly 5 which are sequentially arranged, the separating assembly 4 is used for separating the adhesive film from the protective film, and the leveling and conveying assembly 5 is used for leveling and conveying the adhesive film. The setting of the leveling conveying component 5 ensures that the adhesive film is in a leveling state when being led out of the film conveying device.

Referring to fig. 4, the leveling and conveying assembly 5 includes a driving roller 51 and a driven roller 52 which are disposed at an upper and lower interval, the axes of the driving roller 51 and the driven roller 52 are parallel and the interval therebetween is adjustable, and the adhesive film passes between the driving roller 51 and the driven roller 52. The driving roller 51 is rotated by the conveying drive member 55, and the driven roller 52 is moved up and down by the distance adjusting drive member 53 to adjust the vertical distance from the driving roller 51.

In one embodiment, the driving roller 51 is externally sleeved with an anti-slip sleeve, the anti-slip sleeve is made of rubber, the smooth surface of the adhesive film is abutted against the anti-slip sleeve, and the friction force between the adhesive film and the adhesive film is improved so as to convey the adhesive film. The surface of the driven roller 52 is provided with the smooth sleeve made of teflon, the back adhesive surface of the adhesive film is abutted with the smooth sleeve, so that the smoothness is improved, and the adhesive film is prevented from being wrinkled due to the sticking of the back adhesive surface and the smooth sleeve.

In one embodiment, the driving roller 51 and the driven roller 52 are both rotatably connected between two risers 54, the risers 54 are fixed to the table 1, and the driven roller 52 can also move up and down along the risers 54. The conveying driving member 55 is a motor, and is fixed to a vertical plate 54 to drive the driving roller 51 to rotate. The distance adjusting driving member 53 is two cylinders, which are respectively fixed to two vertical plates 54, and the two cylinders move synchronously to drive the driven roller 52 to move up and down from both sides. The standing plate 54 is provided with a waist-shaped groove for the driven roller 52 to move.

The adhesive film passes between the driving roller 51 and the driven roller 52, the driving roller 51 and the driven roller 52 clamp the adhesive film, and when the conveying driving member 55 drives the driving roller 51 to rotate, the adhesive film is driven to move under the driving of friction force. When the film pulling device 2 clamps the film and drives the film to move, the driven roller 52 is driven by the distance-adjusting driving piece 53 to move downwards and away from the driving roller 51, the driving roller 51 and the driven roller 52 do not clamp the film any more, and therefore no moving force is applied to the film, and the film pulling device 2 pulls the film to move. However, in this process, the distance between the driving roller 51 and the driven roller 52 still plays a role in guiding and leveling the adhesive film.

In one embodiment, referring to fig. 7, the separating assembly 4 includes a feeding roller 41, a recovery roller 42, and two separating rollers 43, and the feeding roller 41 and the recovery roller 42 are driven to rotate along their axes by corresponding rotation driving members. The film and the protective film before separation are wound on the loading roller 41, and the protective film after separation is wound on the recovery roller 42. The two separating rollers 43 are positioned between the feeding roller 41 and the leveling and conveying assembly 5, the two separating rollers 43 are parallel to each other and are arranged at intervals up and down, and the adhesive film and the protective film pass through between the two separating rollers 43 and are separated at the two separating rollers 43. The adhesive film is conveyed to the leveling and conveying assembly 5 after passing through the two separating rollers 43, and the protective film is wound on the recovery roller 42 for recovery after passing through the two separating rollers 43. The feed roller 41 and the recovery roller 42 are rotated in opposite directions.

In one embodiment, the diameters of the feeding roller 41 and the recovery roller 42 are the same, but the thickness of the adhesive film and the protective film on the feeding roller 41 is greater than the thickness of the protective film of a single layer on the recovery roller 42, so that the rotational speed of the recovery roller 42 is greater than the rotational speed of the feeding roller 41 in order to achieve the synchronization of feeding and recovery of the feeding roller 41 and the recovery roller 42.

Referring to fig. 3 and 6, the displacement device 3 includes two transmission chains 31 of a closed-loop structure that rotate in synchronization, and the two transmission chains 31 are located on both sides in the width direction of the table 1 and below the table 1. The two transmission chains 31 are driven by a displacement driving piece 32 to synchronously rotate, and the film pulling device 2 is fixed on the transmission chains 31. When the transmission chain 31 rotates clockwise or anticlockwise, the pulling and grinding device is driven to reciprocate above the workbench 1 along a straight line.

The displacement device 3 further comprises a driving sprocket 33 and a driven sprocket 34 which are arranged corresponding to the transmission chain 31, a fixed plate 22 is fixed below the workbench 1, the driving sprocket 33 and the driven sprocket 34 are connected on the fixed plate 22 in a rotating way, and the transmission chain 31 surrounds the driving wheel and the driven wheel. The two driving sprockets 33 are connected with a transmission rod 35 which rotates synchronously with the two driving sprockets 33, the displacement driving member 32 is a motor, the transmission rod 35 is driven to rotate, the two driving sprockets 33 rotate synchronously, and then the two transmission chains 31 rotate synchronously.

In one embodiment, since the transmission chain 31 will loosen during long-term use, the displacement device 3 further includes a tension wheel 36 corresponding to the transmission chain 31, where the tension wheel 36 is rotatably connected to the fixed plate 22 and can slide along the fixed plate 22 to adjust the tension of the transmission chain 31.

The transmission chain 31 surrounds on the tension roller 36, the tension roller 36 can slide along the length direction of the workbench 1, a chute for the central shaft of the tension roller 36 to slide is formed in the fixed plate 22, and the central shaft of the tension roller 36 can slide in the chute and can be fixed on the fixed plate 22 through bolts.

Referring to fig. 3 and 5, the film drawing device 2 includes a connection frame 21 extending along the width direction of the table 1, and the connection frame 21 is connected to the displacement device 3, that is, the connection frame 21 is fixed to the transmission chain 31 by fixing plates 22 on both sides, so that the connection frame 21 and the transmission chain 31 move synchronously. The link 21 is provided with multiunit clamping jaw towards one side of film feed device, and every clamping jaw of group includes two upper and lower interval setting and interval adjustable splint, and the glued membrane can press from both sides tightly between two splint.

One of the two clamping plates is a fixed clamping plate 23, the other clamping plate is a movable clamping plate 24, the fixed clamping plate 23 is fixed on the connecting frame 21, the movable clamping plate 24 is driven by a clamping driving piece 25 to be close to or far away from the fixed clamping plate 23, and the clamping driving piece 25 is an air cylinder and is fixed on the connecting frame 21.

In one embodiment, in order to improve the stability of the movement of the film drawing device 2, the fixing plate 22 is further provided with an upper guide wheel 26 located above the working table 1 and a lower guide wheel 27 located below the working table 1. The upper guide wheel 26 and the lower guide wheel 27 respectively abut against the upper end face and the lower end face of the workbench 1, and provide stable support for the movement of the connecting frame 21.

When the separated adhesive film is conveyed to the upper part of the workbench 1 through the leveling and conveying assembly 5, the driving roller 51 of the leveling and conveying assembly 5 does not rotate any more, and the conveying of the adhesive film is stopped. The product is placed on the workbench 1, and at the moment, the displacement driving piece 32 drives the two transmission chains 31 to synchronously rotate, so that the film pulling device 2 is driven to move towards the leveling and conveying assembly 5. When the film pulling device 2 is driven to move in place, the film pulling device is stopped, at the moment, the fixed clamping plate 23 is positioned below the adhesive film, the movable clamping plate 24 is positioned above the adhesive film, the clamping driving piece 25 drives the movable clamping plate 24 to move downwards, and the end part of the adhesive film is clamped between the fixed clamping plate 23 and the movable clamping plate 24. Then the displacement driving piece 32 drives the two transmission chains 31 to synchronously and reversely rotate, meanwhile, the feeding roller 41 unwinds, the recovery roller 42 winds, the film pulling device 2 pulls the adhesive film away from the leveling conveying assembly 5, the adhesive film is flatly positioned above a product, and automatic feeding of the adhesive film is realized.

In one embodiment, referring to fig. 4 and 2, a film pressing device 6 is further disposed on the side of the table 1 away from the leveling and conveying assembly 5, and the film pressing device 6 presses the end of the adhesive film onto the table 1. The film pressing device 6 comprises a pressing plate 61 which is arranged above the workbench 1 and can move up and down, and the pressing plate 61 can move up and down under the driving of a film pressing driving piece 62 so as to press or loosen the adhesive film.

The film pulling device 2 can move to one side of the film pressing device 6 far away from the leveling conveying assembly 5, at this time, the adhesive film is unfolded, one end of the adhesive film is wound on the feeding roller 41, and the other end of the adhesive film is a free end and is clamped on the film pulling device 2. At this time, the pressing plate 61 is moved downward to press the free end of the adhesive film against the table 1, thereby fixing the adhesive film.

In one embodiment, referring to fig. 6 and 8, a guiding assembly 7 is further disposed on one side of the table 1 near the leveling and conveying assembly 5, and the guiding assembly 7 includes a lower plate 71 and an upper plate 72 disposed at an upper and lower interval, and the adhesive film passes between the upper plate 72 and the lower plate 71. The lower plate 71 and the upper plate 72 are provided with a yielding groove 73 which is arranged corresponding to the clamping plate, and the clamping plate can be inserted into the yielding groove 73 and clamp the part of the adhesive film positioned in the yielding groove 73. The guide assembly 7 improves the accuracy of clamping the adhesive film by the clamping plate.

The guide assembly 7 is provided with a cutter 81 on a side away from the leveling conveying assembly 5, the cutter 81 can move along the width direction of the workbench 1, and the cutter 81 can be abutted against the adhesive film and cut off the adhesive film. When the film is coated with the product, the cutter 81 cuts off the film, and the product can be taken off the table 1. The film pulling device 2 re-clamps the adhesive film and flattens the adhesive film on the next product.

In one embodiment, a cutting driving member 82 fixed on the workbench 1 is arranged above the guide assembly 7, and the cutting driving member 82 is a rodless cylinder and drives the cutting knife 81 to move. The workbench 1 is provided with a cutting groove which is arranged corresponding to the cutting knife 81, and the end part of the cutting knife 81 can extend into the cutting groove to cut off the adhesive film on the workbench 1.

The above embodiments are only for illustrating the technical concept and features of the present utility model, and are intended to enable those skilled in the art to understand the content of the present utility model and to implement the same, but are not intended to limit the scope of the present utility model, and all equivalent changes or modifications made according to the spirit of the present utility model should be included in the scope of the present utility model.

Claims

1. Go up membrane mechanism, its characterized in that: comprising

The working platform is provided with a working table,

the film feeding device is arranged on one side of the workbench along the length direction and comprises a separation assembly and a leveling conveying assembly, wherein the separation assembly is used for separating the adhesive film from the protective film, and the leveling conveying assembly is used for leveling the adhesive film and conveying the adhesive film to the workbench;

and the film pulling device can slide along the length direction of the workbench and is used for clamping and leveling the separated adhesive films conveyed by the conveying assembly, and the film pulling device expands the adhesive films when being far away from the film conveying device.

2. The film feeding mechanism according to claim 1, wherein: the leveling conveying assembly comprises a driving roller and a driven roller which are arranged at an upper and lower interval, the axes of the driving roller and the driven roller are parallel, the distance between the driving roller and the driven roller is adjustable, the adhesive film passes through the space between the driving roller and the driven roller, the driving roller rotates under the driving of the conveying driving piece, and the driven roller can move up and down under the driving of the distance-adjusting driving piece.

3. The film feeding mechanism according to claim 1, wherein: the separation assembly comprises a feeding roller, a recovery roller and two separation rollers, the feeding roller and the recovery roller are driven by a rotary driving piece which is correspondingly arranged to reversely rotate along the axis of the feeding roller and the recovery roller, the two separation rollers are positioned between the feeding roller and the leveling conveying assembly, and the adhesive film and the protective film pass through the two separation rollers and are separated at the two separation rollers.

4. The film feeding mechanism according to claim 2, wherein: the outer part of the driving roller is sleeved with an anti-slip sleeve made of rubber, and the smooth surface of the adhesive film is abutted with the anti-slip sleeve; the surface of the driven roller is provided with a smooth sleeve made of teflon, and the back adhesive surface of the adhesive film is abutted with the smooth sleeve.

5. The film feeding mechanism according to claim 1, wherein: the workbench is also provided with a displacement device, the film pulling device is connected with the displacement device, and the displacement device is used for driving the film pulling device to reciprocate along a straight line.

6. The film feeding mechanism according to claim 5, wherein: the displacement device comprises two transmission chains which synchronously rotate and are of a closed-loop structure, the two transmission chains are positioned on two sides of the width direction of the workbench, the two transmission chains synchronously rotate under the drive of a displacement driving piece, and the film pulling device is fixed on the transmission chains.

7. The film feeding mechanism according to claim 6, wherein: the film pulling device comprises a connecting frame extending along the width direction of the workbench, the connecting frame is fixed on a transmission chain through fixing plates on two sides, a plurality of groups of clamping jaws are arranged on one side of the connecting frame, which faces the film feeding device, each group of clamping jaws comprises two clamping plates which are arranged at intervals up and down and have adjustable intervals, and the adhesive film can be clamped between the two clamping plates.

8. The film feeding mechanism according to claim 7, wherein: the fixing plate is also provided with an upper guide wheel positioned above the workbench and a lower guide wheel positioned below the workbench, and the upper guide wheel and the lower guide wheel are respectively abutted with the upper end face and the lower end face of the workbench.

9. The film feeding mechanism according to claim 1, wherein: one side of the workbench, which is far away from the leveling conveying assembly, is also provided with a film pressing device, the film pressing device comprises a pressing plate and a film pressing driving piece, and the pressing plate is positioned above the workbench and can move up and down under the driving of the film pressing driving piece.

10. The film feeding mechanism according to claim 7, wherein: a guide assembly is further arranged on one side of the workbench, which is close to the leveling conveying assembly, the guide assembly comprises a lower plate and an upper plate which are arranged at intervals up and down, the adhesive film passes through the space between the upper plate and the lower plate, the lower plate and the upper plate are provided with a yielding groove which is arranged corresponding to the clamping plate, and the clamping plate can be inserted into the yielding groove and clamp the part of the adhesive film in the yielding groove.