Protective film scrap edge pulling device

Abstract

This application provides a protective film waste edge traction device, including a fixed base, a lifting roller, and a cutting assembly. The lifting roller is disposed on the upper side of the fixed base and has a pressing structure between it and the fixed base, so that the lifting roller cooperates with the upper side of the fixed base to squeeze the waste edge. The lifting roller has a degree of freedom to rotate about its own central axis and is driven by a rotation drive component, so that the lifting roller provides a driving force for translation along the length direction of the squeezed waste edge. The cutting assembly is disposed on the fixed base and located on the side of the lifting roller opposite to the waste edge entry direction, and is used to cut one or two waste edges along the width direction of the waste edge, thereby forming a waste edge strip that meets a preset length, has been squeezed, and has moved to the outside of the lifting roller. The protective film waste edge traction device provided by this application can simultaneously traction and recover waste edges while flattening and cutting them, so as to prevent the waste edges from turning into a curled state, thus combining the original two processes into one and ensuring the overall production efficiency of polycarbonate sheets.

Description

Technical Field

[0001] This application belongs to the field of polycarbonate sheet production technology, specifically relating to a protective film waste edge traction device. Background Technology

[0002] During the production of boards, manufacturers typically cover their surfaces with a protective film to prevent dust accumulation and scratches. Normally, the protective film is wider than the board itself to facilitate the lamination process; however, in this case, the protective film extends significantly beyond the board, affecting subsequent packaging steps. Therefore, it is necessary to use a blade to trim the excess protective film edges (hereinafter referred to as waste edges).

[0003] In the prior art, the cut-off waste edges are pulled and recycled by a winding device. Specifically, the winding device includes a winding shaft that is rotatably set above the ground. In use, the winding shaft is connected to two waste edges, so that when it rotates, the two waste edges continuously wrap around the surface of the winding shaft to achieve the traction and recycling of the waste edges.

[0004] The inventors discovered that the waste edges recovered by the winding equipment are in a curled state, and need to be cut and flattened in subsequent processes (the waste edge strips are usually hollow structures) to obtain straight waste edge strips of a predetermined length, thus facilitating reprocessing. However, the total time consumed by the winding and recovery process and the cutting and flattening process is relatively long, and the winding and recovery method creates certain operational difficulties for the cutting and flattening processes, affecting the overall production efficiency of polycarbonate sheets. Utility Model Content

[0005] This application provides a protective film waste edge traction device, which aims to simultaneously traction and recycle waste edges while flattening and cutting them to prevent the waste edges from turning into a curled state, thus merging the original two processes into one and ensuring the overall production efficiency of polycarbonate sheets.

[0006] To achieve the above objectives, the technical solution adopted in this application is as follows:

[0007] A protective film waste edge traction device is provided, comprising:

[0008] A mounting bracket is used to fix the device to the ground.

[0009] A lifting roller, disposed on the upper side of the fixed base, has its axis parallel to the horizontal plane, and a pressing structure exists between the lifting roller and the fixed base to allow the lifting roller to extrude two waste edges against the upper side of the fixed base; the lifting roller has a degree of freedom to rotate about its own central axis and is driven by a rotational drive component to drive the extruded waste edges to translate along their length; and

[0010] A cutting assembly is mounted on the fixed base and is located on the side of the lifting roller facing away from the waste edge entry direction, for cutting one or two waste edges along the width direction of the waste edge.

[0011] In one possible implementation, the cutting component includes:

[0012] Two guide rails are both disposed on the upper side of the fixed base and are spaced apart along the translational direction of the waste edge, so that both waste edges pass under the guide rails; and

[0013] Two blades are slidably mounted on the two guide rails, and the sliding direction is parallel to the width direction of the waste edge;

[0014] The two blades are located on opposite sides of the waste edge width direction, and each guide rail is provided with a damping member; the damping member is used to abut against the corresponding blade to limit the movement distance of the blade.

[0015] In one possible implementation, the damping member includes:

[0016] A limiting platform is slidably mounted on the guide rail, and its sliding direction is parallel to the sliding direction of the blade; the limiting platform is provided with multiple alignment nuts, the axial direction of each alignment nut being parallel to the vertical direction; and

[0017] Multiple stop bolts are provided on the limiting platform and are threadedly connected to the multiple positioning nuts one by one;

[0018] The lower end of each stop bolt is used to abut against the upper side of the fixed seat to restrict the movement of the limiting platform relative to the guide rail; and the limiting platform is used to move between the two waste edges and abut against the corresponding blade to restrict the movement of the blade.

[0019] In one possible implementation, the guide rail has a through-hole in the vertical direction, and the through-hole extends along the width direction of the waste edge; the blade further includes:

[0020] The docking block is connected to the blade and is slidably inserted into the strip hole.

[0021] In one possible implementation, a transmission nut is provided on the mating block, the axial direction of which is parallel to the extension direction of the strip hole; the guide rail further includes:

[0022] A drive screw is rotatably mounted on the guide rail and threadedly connected to the transmission nut; and

[0023] A drive motor is mounted on the guide rail and is connected to the drive screw via a transmission.

[0024] In one possible implementation, the fixed base has two vertical plates spaced apart along the axial direction of the lifting roller; each vertical plate has a mounting hole extending in the vertical direction, and the two mounting holes corresponding to the two vertical plates are coaxially arranged.

[0025] Both ends of the lifting roller have connecting rods coaxially connected to them; the two connecting rods are respectively inserted into the two mounting holes so that the lifting roller has the degree of freedom to move in the vertical direction relative to the fixed base, and the degree of freedom to rotate about its own central axis.

[0026] In one possible implementation, the pressure-down structure includes:

[0027] A threaded hole is formed on the top surface of one of the upright plates and communicates with the mounting hole; and

[0028] A positioning bolt is threaded into the threaded hole, and its lower end is used to abut against the connecting rod to restrict the upward movement of the connecting rod relative to the fixed seat.

[0029] In one possible implementation, the lower end face of the positioning bolt is provided with a concave ball groove, and a ball bearing that contacts the outer peripheral surface of the connecting rod is embedded in the concave ball groove.

[0030] In one possible implementation, the rotation drive component includes:

[0031] The lifting seat is slidably connected to one of the vertical plates in the vertical direction; and

[0032] A rotating motor is fixedly mounted on the lifting base, and its power output end is connected to the corresponding connecting rod transmission.

[0033] The rotating motor can drive the connecting rod to rotate, and can also move synchronously with the movement of the connecting rod, as well as drive the lifting seat to move synchronously.

[0034] In one possible implementation, the outer periphery of the lifting roller is fitted with an elastic sleeve, and under the action of the pressing structure, the portion of the elastic sleeve in contact with the waste edge undergoes elastic deformation.

[0035] The outer circumferential surface of the lifting roller has a plurality of grooves spaced apart along its circumference, and the inner circumferential surface of the elastic sleeve has a plurality of protruding ridges that are adapted to be fitted into the plurality of grooves one by one.

[0036] In this embodiment, by adjusting the position of the lifting roller relative to the fixed seat through the pressing structure, the lifting roller can ensure the pressing of the two waste edges, thereby achieving the technical purpose of flattening the waste edges. Simultaneously, by rotating the lifting roller through the rotation drive component, the waste edges can be moved along their length, thereby achieving the technical purpose of traction. When it is necessary to cut the traction waste edges, one or both waste edges can be cut using the cutting component. During this process, since the cutting component is positioned away from the direction in which the lifting roller enters, a portion of the cut waste edge remains connected to the lifting roller, ensuring effective traction of the waste edges.

[0037] The protective film waste edge traction device provided in this embodiment, compared with the prior art, can simultaneously traction and recycle waste edges while flattening and cutting them to prevent the waste edges from turning into a curled state, thus merging the original two processes into one and ensuring the overall production efficiency of polycarbonate sheets. Attached Figure Description

[0038] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0039] Figure 1 This is a three-dimensional structural schematic diagram of the protective film waste edge traction device provided in the embodiments of this application;

[0040] Figure 2 for Figure 1 Top view;

[0041] Figure 3 For along Figure 2 Cross-sectional view of line AA in the middle;

[0042] Figure 4 For along Figure 2 Cross-sectional view of the middle BB line;

[0043] Figure 5 This is a three-dimensional structural diagram of the lifting roller and elastic sleeve used in the embodiments of this application from an exploded view.

[0044] Figure 6 This is an exploded structural diagram of the rotation drive component used in the embodiments of this application;

[0045] Figure 7 This is an exploded structural diagram of the downward compression structure used in the embodiments of this application;

[0046] Figure 8This is a front view of the upright plate and positioning screw used in the embodiments of this application in their combined state;

[0047] Figure 9 This is a three-dimensional structural diagram of the positioning screw and ball used in the embodiments of this application from an explosion perspective;

[0048] Figure 10 This is a three-dimensional structural diagram of the guide rail and braking component used in the embodiments of this application in a combined state;

[0049] Figure 11 This is an exploded view of the limiting platform and alignment nut used in the embodiments of this application;

[0050] Figure 12 This is a three-dimensional structural diagram of the cutting component used in the embodiments of this application;

[0051] Figure 13 This is an exploded structural diagram of the blade and transmission nut used in the embodiments of this application;

[0052] Explanation of reference numerals in the attached drawings: 1. Fixed base; 11. Vertical plate; 111. Mounting hole; 2. Lifting roller; 21. Connecting rod; 22. Groove; 3. Cutting assembly; 31. Guide rail; 311. Strip hole; 312. Drive screw; 313. Drive motor; 32. Blade; 321. Connecting block; 322. Transmission nut; 4. Pressing structure; 41. Threaded hole; 42. Positioning bolt; 421. Concave ball groove; 422. Ball; 5. Rotation drive component; 51. Lifting base; 52. Rotation motor; 6. Blocking component; 61. Limiting platform; 611. Alignment nut; 62. Stop bolt; 7. Elastic sleeve; 71. Raised ridge. Detailed Implementation

[0053] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0054] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0055] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0056] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0057] Please refer to the following: Figures 1 to 13 The protective film waste edge pulling device provided in this application will now be described. The protective film waste edge pulling device proposed in this application includes a fixed base 1, a lifting roller 2, and a cutting assembly 3.

[0058] The fixing seat 1 is used to fix it on the ground, specifically on one side of the sheet material translating equipment. Usually, in order to facilitate the recycling of waste edges, the fixing seat 1 is usually set on the ground outside the equipment, and the upper side of the fixing seat 1 is below the horizontal plane of waste edge cutting.

[0059] The lifting roller 2 is positioned on the upper side of the fixed base 1, with its axis parallel to the horizontal plane. Normally, the axis of the lifting roller 2 is perpendicular to the direction of translation of the sheet material, allowing the removed waste edge to enter the space between the lifting roller 2 and the fixed base 1 along its length. A pressing structure 4 exists between the lifting roller 2 and the fixed base 1. This pressing structure 4 applies a downward force to the lifting roller 2, restricting its movement away from the fixed base 1. This allows the lifting roller 2, in conjunction with the upper side of the fixed base 1, to press the two waste edges together, forming a relatively flat waste edge strip.

[0060] In practical use, the lifting roller 2 has the freedom to rotate around its own central axis, and is connected to a rotation drive component 5 for driving its rotation. When the lifting roller 2 is pressed against the upper side of the fixed seat 1, the rotation drive component 5 drives the lifting roller 2 to rotate relative to the fixed seat 1. Under the action of friction, the pressed waste edge can be driven to move along the length direction of the waste edge, thereby achieving the traction of the waste edge.

[0061] The cutting component 3 is mounted on the fixed base 1 and is located on the side of the lifting roller 2 facing away from the waste edge entry direction. It is used to cut one or two waste edges along the width direction of the waste edge. In actual cases, the waste edge that has passed through the lifting roller 2 has become a waste edge strip. The position of this cutting component 3 is mainly used to cut the waste edge strip.

[0062] In this embodiment, by adjusting the position of the lifting roller 2 relative to the fixed seat 1 through the pressing structure 4, the pressing roller 2 can ensure the pressing of the two waste edges, thereby achieving the technical purpose of flattening the waste edges and converting them into waste edge strips. At the same time, by rotating the driving component 5 to drive the lifting roller 2 to rotate, the waste edge can be made to translate relative to the fixed seat 1 along its own length direction under the action of friction, thereby achieving the technical purpose of traction of the waste edge.

[0063] When it is necessary to cut the traction waste edge, one or two waste edges can be cut by the cutting component 3. During this process, since the cutting component 3 is positioned away from the direction in which the lifting roller 2 enters, part of the cut waste edge remains in contact with the lifting roller 2, ensuring effective traction of the waste edge. At the same time, since the waste edge has been compressed by the lifting roller 2 and transformed into a waste edge strip, there will be no warping or bending during the cutting process, thus ensuring that the cutting surface is perpendicular to the translational direction of the waste edge.

[0064] Compared with the prior art, the protective film waste edge traction device provided in this embodiment can achieve the traction of waste edge by rotating the lifting roller 2 and the friction between the lifting roller 2 and the waste edge. It can also flatten the waste edge by cooperating with the lifting roller 2 and the fixed seat 1. Furthermore, it can cut the flattened waste edge strip by the cutting component 3, thus merging the original two processes into one. At the same time, the waste edge will not become entangled during the entire process, thereby avoiding the waste edge from turning into a curled state, thus avoiding technical interference with other processes, and ultimately achieving the technical effect of ensuring the overall production efficiency of polycarbonate sheets.

[0065] In some embodiments, such as Figure 1 , Figure 4 and Figure 12 As shown, the cutting assembly 3 includes two guide rails 31 and two blades 32.

[0066] Two guide rails 31 correspond one-to-one with two waste edges. Both guide rails 31 are set on the upper side of the fixed base 1 and are spaced apart along the translational direction of the waste edges so that both waste edges pass through the lower side of the guide rails 31. In actual cases, the upper side of the fixed base 1 adopts a concave structure, and the guide rails 31 are fixed on the upper part of the fixed base 1 so that the waste edges pass through the concave area.

[0067] Two blades 32 are slidably mounted on two guide rails 31, and the sliding direction is parallel to the width direction of the waste edge. That is, the sliding directions of the two blades 32 are parallel to each other, and both can cut into the corresponding waste edge along the width direction of the waste edge.

[0068] When the waste edge passes through the guide rail 31, two blades 32 are respectively set on both sides of the waste edge moving area along the width direction of the waste edge, and each guide rail 31 is provided with a blocking member 6; the blocking member 6 is used to abut against the corresponding blade 32 to limit the moving distance of the blade 32, that is, after each blade 32 cuts the corresponding waste edge, it will abut against the blocking member 6, thereby limiting its cutting towards another waste edge.

[0069] In some embodiments, such as Figure 10 and Figure 11 As shown, the braking component 6 includes a limiting platform 61 and multiple stop bolts 62.

[0070] The limiting platform 61 is slidably mounted on the guide rail 31, and its sliding direction is parallel to the sliding direction of the blade 32. The moving trajectory of the limiting platform 61 coincides with the moving trajectory of the blade 32. Multiple alignment nuts 611 are provided on the limiting platform 61. The axial direction of each alignment nut 611 is parallel to the vertical direction, and the holes of the alignment nuts 611 are set on the upper side of the limiting platform 61.

[0071] Multiple stop bolts 62 are provided on the limiting platform 61 and are threadedly connected to multiple alignment nuts 611 one by one. In actual use, the lower end of each stop bolt 62 can abut against the upper side of the fixed seat 1 to limit the movement of the limiting platform 61 relative to the guide rail 31.

[0072] In actual use, the limiting platform 61 is used to move between the two waste edges and abut against the corresponding blade 32 to restrict the movement of the blade 32; at the same time, in order to ensure the friction strength between the stop bolt 62 and the fixed seat 1, such as Figure 10 As shown, the lower end of the stop bolt 62 is provided with a base that extends radially outward.

[0073] In some embodiments, such as Figure 10 and Figure 13 As shown, the guide rail 31 has a through-hole 311 in the vertical direction, and the through-hole 311 extends along the width direction of the waste edge; based on this, the blade 32 also includes a mating block 321, which is connected to the blade 32 and is slidably inserted into the through-hole 311.

[0074] In actual use, the docking block 321 is used to abut against the aforementioned limiting stage 61 to restrict the movement of the blade 32.

[0075] In some embodiments, such as Figure 4 , Figure 10 and Figure 13 As shown, a transmission nut 322 is provided on the docking block 321, and the axial direction of the transmission nut 322 is parallel to the extension direction of the strip hole 311; based on this, the guide rail 31 also includes a drive screw 312 and a drive motor 313.

[0076] The drive screw 312 is rotatably mounted on the guide rail 31 and threadedly connected to the transmission nut 322, so that when it rotates, it drives the mating block 321 to move horizontally through the transmission nut 322.

[0077] The drive motor 313 is mounted on the guide rail 31 and is connected to the drive screw 312 for transmission, and is used to provide power for the rotation of the drive screw 312.

[0078] In some embodiments, such as Figure 3 As shown, the fixed base 1 has two vertical plates 11 spaced apart along the axial direction of the lifting roller 2, and the two vertical plates 11 are respectively located on both sides of the lifting roller 2; accordingly, each vertical plate 11 has a mounting hole 111 extending in the vertical direction, and the mounting hole 111 passes through the axial direction of the lifting roller 2, and the two mounting holes 111 corresponding to the two vertical plates 11 are coaxially arranged.

[0079] Both ends of the lifting roller 2 have connecting rods 21 coaxially connected to them; the two connecting rods 21 are respectively inserted into two mounting holes 111 so that the lifting roller 2 has the degree of freedom to move in the vertical direction relative to the fixed seat 1, and the degree of freedom to rotate about its own central axis, so as to realize the assembly relationship between the relevant components.

[0080] In some embodiments, such as Figure 7 and Figure 8 As shown, the pressing structure 4 includes a threaded hole 41 and a positioning bolt 42.

[0081] A threaded hole 41 is provided on the top surface of one of the vertical plates 11, with its axis parallel to the vertical direction, and this threaded hole 41 is connected to the mounting hole 111.

[0082] The positioning bolt 42 is threadedly connected to the threaded hole 41, and its lower end is used to abut against the connecting rod 21 to limit the upward movement of the connecting rod 21 relative to the fixed seat 1, so as to ensure that the lifting roller 2 and the upper side of the fixed seat 1 cooperate to squeeze the waste edge of the protective film.

[0083] In this embodiment, the pressing structure 4 has two sets, which are respectively disposed on the two upright plates 11.

[0084] In some embodiments, such as Figure 9 As shown, the lower end face of the positioning bolt 42 is provided with a concave ball groove 421, and a ball 422 is embedded in the concave ball groove 421; after the ball 422 is embedded in the concave ball groove 421, part of the ball 422 extends out from the opening of the concave ball groove 421.

[0085] In actual use, the positioning bolt 42 contacts the outer peripheral surface of the connecting rod 21 through the extended portion of the ball 422, thereby changing the line contact to point contact and optimizing the smoothness of the rotation of the connecting rod 21 relative to the positioning bolt 42.

[0086] In some embodiments, such as Figure 1 , Figure 3 and Figure 6 As shown, the rotation drive component 5 includes a lifting seat 51 and a rotation motor 52.

[0087] The lifting seat 51 is slidably connected to one of the vertical plates 11 in the vertical direction, specifically to the side of the vertical plate 11 facing away from the other vertical plate 11.

[0088] The rotating motor 52 is fixedly mounted on the lifting seat 51, and its power output end is connected to the corresponding connecting rod 21 for transmission.

[0089] In actual use, the rotating motor 52 can drive the connecting rod 21 to rotate, and can also move synchronously with the movement of the connecting rod 21, as well as drive the lifting seat 51 to move synchronously, thereby ensuring the stability of the entire transmission structure.

[0090] In some embodiments, such as Figure 5 As shown, the outer periphery of the lifting roller 2 is fitted with an elastic sleeve 7, and under the action of the pressing structure 4, the part of the elastic sleeve 7 that is in contact with the waste edge can undergo elastic deformation.

[0091] The outer circumferential surface of the lifting roller 2 has multiple grooves 22 spaced apart along its circumference. The inner circumferential surface of the elastic sleeve 7 has multiple protrusions 71 that are adapted to be fitted into the multiple grooves 22 one by one. Through the insertion relationship between the grooves 22 and the protrusions 71, the synchronous rotation of the lifting roller 2 and the elastic sleeve 7 can be ensured, the rotation of the elastic sleeve 7 relative to the lifting roller 2 can be avoided, and the strength and stability of the overall structure can be improved.

[0092] The above content is only a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A protective film waste edge traction device, characterized in that, include: A mounting bracket is used to fix the device to the ground. A lifting roller is disposed on the upper side of the fixed base, its axis is parallel to the horizontal plane, and there is a pressing structure between the lifting roller and the fixed base so that the lifting roller cooperates with the upper side of the fixed base to extrude two waste edges; the lifting roller has a degree of freedom to rotate about its own central axis, and is connected to a rotation drive component to drive the extruded waste edges to translate along the length direction. as well as A cutting assembly is mounted on the fixed base and is located on the side of the lifting roller facing away from the waste edge entry direction, for cutting one or two waste edges along the width direction of the waste edge.

2. The protective film waste edge traction device as described in claim 1, characterized in that, The cutting assembly includes: Two guide rails are both disposed on the upper side of the fixed base and are spaced apart along the translational direction of the waste edge, so that both waste edges pass under the guide rails; and Two blades are slidably mounted on the two guide rails, and the sliding direction is parallel to the width direction of the waste edge; The two blades are located on opposite sides of the waste edge width direction, and each guide rail is provided with a damping member; the damping member is used to abut against the corresponding blade to limit the movement distance of the blade.

3. The protective film waste edge traction device as described in claim 2, characterized in that, The braking component includes: A limiting platform is slidably mounted on the guide rail, and its sliding direction is parallel to the sliding direction of the blade; the limiting platform is provided with multiple alignment nuts, the axial direction of each alignment nut being parallel to the vertical direction; and Multiple stop bolts are provided on the limiting platform and are threadedly connected to the multiple positioning nuts one by one; The lower end of each stop bolt is used to abut against the upper side of the fixed seat to restrict the movement of the limiting platform relative to the guide rail; and the limiting platform is used to move between the two waste edges and abut against the corresponding blade to restrict the movement of the blade.

4. The protective film waste edge traction device as described in claim 2, characterized in that, The guide rail has a through-hole running vertically, and the through-hole extends along the width of the waste edge; the blade also includes: The docking block is connected to the blade and is slidably inserted into the strip hole.

5. The protective film waste edge traction device as described in claim 4, characterized in that, A transmission nut is provided on the docking block, and the axial direction of the transmission nut is parallel to the extension direction of the strip hole; the guide rail further includes: A drive screw is rotatably mounted on the guide rail and threadedly connected to the transmission nut; and A drive motor is mounted on the guide rail and is connected to the drive screw via a transmission.

6. The protective film waste edge traction device as described in claim 1, characterized in that, The fixed base has two vertical plates spaced apart along the axial direction of the lifting roller; each vertical plate has a mounting hole extending in the vertical direction, and the two mounting holes corresponding to the two vertical plates are coaxially arranged. Both ends of the lifting roller have connecting rods coaxially connected to them; the two connecting rods are respectively inserted into the two mounting holes so that the lifting roller has the degree of freedom to move in the vertical direction relative to the fixed base, and the degree of freedom to rotate about its own central axis.

7. The protective film waste edge traction device as described in claim 6, characterized in that, The pressing structure includes: A threaded hole is formed on the top surface of one of the upright plates and communicates with the mounting hole; and A positioning bolt is threaded into the threaded hole, and its lower end is used to abut against the connecting rod to restrict the upward movement of the connecting rod relative to the fixed seat.

8. The protective film waste edge traction device as described in claim 7, characterized in that, The lower end face of the positioning bolt is provided with a concave ball groove, and a ball bearing that contacts the outer circumferential surface of the connecting rod is embedded in the concave ball groove.

9. The protective film waste edge traction device as described in claim 6, characterized in that, The rotation drive component includes: The lifting seat is slidably connected to one of the vertical plates in the vertical direction; and A rotating motor is fixedly mounted on the lifting base, and its power output end is connected to the corresponding connecting rod transmission. The rotating motor can drive the connecting rod to rotate, and can also move synchronously with the movement of the connecting rod, as well as drive the lifting seat to move synchronously.

10. The protective film waste edge traction device as described in claim 1, characterized in that, The outer periphery of the lifting roller is fitted with an elastic sleeve, and under the action of the pressing structure, the portion of the elastic sleeve that is in contact with the waste edge undergoes elastic deformation. The outer circumferential surface of the lifting roller has a plurality of grooves spaced apart along its circumference, and the inner circumferential surface of the elastic sleeve has a plurality of protruding ridges that are adapted to be fitted into the plurality of grooves one by one.

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