Pulley type scraper device for plate edge scraping

Abstract

The utility model discloses a pulley type scraper device for scraping edges of plates, which is mainly composed of a long-edge main scraper and short-edge two-side scrapers, the long-edge main scraper is composed of a main knife lower paper pressing pulley assembly, a main knife upper paper pressing pulley assembly, a main knife cleaning brush, an extension spring reset assembly and a main knife rest, and the main knife rest is composed of a main knife lower paper pressing pulley assembly, a main knife lower paper pressing pulley assembly and a main knife lower paper pressing pulley assembly. The short edge two-side scraper is composed of a side knife lower paper pressing pulley assembly, a side knife upper paper pressing pulley assembly, a side knife paper scrap scraper assembly, an extension spring reset assembly, a side knife rest and a side knife sweeping brush. The short edge two-side scraper is divided into a left side scraper body and a right side scraper body. The two sides are identical in structure and symmetrical in orientation. The utility model relates to plate processing equipment, in particular to a pulley type scraper device for scraping edges of plates, which is excellent in performance and stable in state and is used for realizing production automation, informatization and intellectualization.

Description

Technical Field

[0001] The utility model relates to the technical field of plate processing equipment, in particular to a pulley type scraper device used for scraping the edges of plates. Background Art

[0002] Melamine board has the advantages of fireproof, waterproof, heat-resistant, rich colors and patterns, paint-free, easy to clean, corrosion-resistant, and inexpensive. Therefore, it is the main board for panel furniture, custom wardrobes, custom cabinets and other products.

[0003] In the melamine board veneer production process, after the veneer is completed, there is excess impregnated paper on the edge of the board, which needs to be removed in the subsequent process. Currently, there are two main cleaning methods: manual cleaning and automatic cleaning by mechanical equipment. Manual cleaning has a low degree of automation, relies more on manual labor, and has low production efficiency, which is not conducive to large-scale production. Although the current automatic cleaning mechanical equipment has improved production efficiency, it is difficult to debug, and the board edge is prone to collapse, corner knocking, uneven board edge, damage to the substrate and other quality problems.

[0004] Therefore, in order to clean the excess impregnated paper on the edge of the melamine board, it is necessary to study a device with excellent performance and stable state to realize production automation, informatization and intelligence. Utility Model Content

[0005] In view of the above situation, in order to overcome the current technical defects, the utility model provides a novel pulley scraper device for removing excess impregnated paper from the edge of a melamine board in the veneer process.

[0006] The technical solution adopted by the utility model is as follows: the utility model is applied to the board edge impregnated paper cleaning machine of the melamine board veneer automatic line (the cleaning machine is a conventional veneer automatic line cleaning machine, which will not be described in detail in this article). The utility model is mainly composed of two parts: the main scraper on the long side and the scrapers on the short sides. The main scraper on the long side is composed of a main knife lower paper pressing pulley assembly, a main knife upper paper pressing pulley assembly, a main knife cleaning brush, a stretching spring reset assembly, and a main knife frame. The scrapers on the short sides are composed of a side knife lower paper pressing pulley assembly, a side knife upper paper pressing pulley assembly, a side knife paper scrap scraper assembly, a stretching spring reset assembly, a side knife frame, and a side knife cleaning brush. The scrapers on the short sides are divided into a left scraper and a right scraper. The two sides have the same structure and are symmetrically arranged.

[0007] The long-side main scraper includes four sets of pulley devices, which are used for pre-pressing excess impregnated paper on the upper and lower surfaces of the plate, and two sets of scraper devices for scraping off broken paper scraps on the plate.

[0008] Furthermore, the side scraper includes two sets of pulley devices, which are respectively used for pre-pressing excess impregnated paper on the upper and lower surfaces of the plate, and also includes a set of scraper devices for scraping off broken paper scraps on the plate.

[0009] Furthermore, the scrapers on both sides of the short sides are divided into a left scraper and a right scraper, which are symmetrically arranged on both sides.

[0010] Specifically, the scraper is provided with a tension spring reset assembly, and the tension spring reset assembly can ensure that during the scraping operation, the pulley and the scraper are always close to the edge of the plate, thereby ensuring the scraping effect.

[0011] Specifically, the pulley is truncated cone-shaped, and springs are arranged on both sides of the pulley, which is installed on the pulley shaft. The pulley can rotate around the pulley shaft and can also slide axially along the pulley shaft, ensuring that the pulley has a good guiding effect on breaking excess impregnated paper and improving the scraping quality.

[0012] Specifically, the pulley frame is set at a certain inclination angle relative to the main tool holder or the side tool holder rotation axis, which is conducive to controlling the breaking position of the paper scraps.

[0013] Specifically, the scraper is provided with a cleaning brush, which can effectively remove paper scraps falling on the board surface.

[0014] The working principle of the utility model is as follows: after the melamine sheet is pressed and pasted, it enters the edge cleaning machine, and the sheet is positioned in the edge cleaning machine. At this time, the front long side of the sheet is positioned at the long side main scraper. The long side main scraper is driven by a motor and moves along the edge cleaning machine track. The main knife paper pressing pulley assembly of the long side main scraper contacts the long side edge of the sheet. The external geometric shape of the pulley arranged on the main knife paper pressing pulley assembly is a truncated cone shape, and its installation angle is set with an inclined angle compared to the normal direction of the sheet plane. The truncated cone shape and installation angle of the pulley enable the pulley to pre-press the impregnated paper protruding from the edge of the substrate and fold it toward the substrate when it moves along the long side edge of the sheet. Due to the easy-to-break characteristic of the impregnated paper itself, the impregnated paper produces neat cracks, and at the same time, the sheet base will not be damaged. Two sets of main knife paper pressing pulleys with opposite installation directions are arranged on one side of the long side main scraper, which are respectively used to complete the pre-pressing of the excess impregnated paper on the upper and lower surfaces of the sheet. After the two sets of pulleys are pre-pressed, the excess impregnated paper on the upper and lower surfaces of the sheet can produce neat cracks with the sheet. The long-side main scraper continues to move forward, and the blade of the main scraper assembly contacts the plate. The tension spring of the tension spring reset assembly pulls the blade to slide over the edge of the long side of the plate to scrape off the broken scraps on the edge. At the same time, the profile brushes installed around the long-side main scraper can complete the cleaning of the scraps on the plate, so that the scraped scraps fall into the hopper of the edge cleaner.

[0015] After the excess impregnated paper on the front long side of the plate is cleaned, it continues to move in the conveying direction. During the movement, the short side of the plate contacts the left scraper on the short side, the right scraper on the short side, the upper paper pressing pulley assembly of the scrapers on both sides of the short side, and the lower paper pressing pulley assembly to pre-press the excess impregnated paper on the short side to break the impregnated paper. The side knife paper scraper assembly then scrapes away the paper scraps, and the profile strip brush installed on the scrapers on both sides of the short side completes the cleaning of the paper scraps on the plate. When the long side of the plate at the back is transported to the main knife position, the plate will be positioned and stopped, and the main scraper on the long side is driven by the motor to run in the reverse direction. The main knife paper pressing pulley assembly on the other side of the main scraper on the long side, the main knife paper scraper assembly, and the stretching spring reset assembly will complete the cleaning of the excess impregnated paper on the long side of the plate at the back. The plate continues to move until the short side of the plate is separated from the left scraper on the short side and the right scraper on the short side. The cleaning of the excess impregnated paper on the edge of the entire plate is completed and enters the next process.

[0016] The beneficial effects achieved by the utility model using the above structure are as follows: The utility model is a pulley scraper device for scraping the edges of plates, and its advantages are: 1. The utility model can improve the edge quality of melamine boards by setting the inclination angle of the pulley relative to the edge of the board. Compared with conventional scraping devices, the edge of the board is neat without corner knocks, saw teeth and other damage.

[0017] 2. The utility model is provided with a plurality of ways to remove paper scraps, such as pulley pre-pressure and scraper removal, which can effectively eliminate the problem of residual paper scraps cleaning.

[0018] 3. The utility model reduces friction by rolling the pulley, which can reduce damage to the substrate during the scraping process, increase the service life of the equipment, and reduce maintenance costs.

[0019] 4. The springs arranged on both sides of the pulley of the utility model can ensure strong adaptability to the position of the plate edge and simple debugging.

[0020] 5. The utility model adopts two sets of pulleys to clean the excess impregnated paper on the upper and lower surfaces of the plate respectively, which can adapt to the scraping needs of plates of different thicknesses and has wide adaptability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 A schematic diagram of a pulley scraper device for scraping the edge of a plate proposed in this scheme;

[0023] Figure 2 A schematic diagram of the main scraper on the long side of the pulley scraper device for scraping the edge of the plate proposed in this scheme;

[0024] Figure 3 Schematic diagram of the scrapers on both sides of the short side of the pulley scraper device for scraping the edge of the plate proposed in this scheme;

[0025] Figure 4 This is a schematic diagram of the paper pressing pulley assembly under the main blade of the pulley-type scraper device for scraping the edge of the plate proposed in this scheme;

[0026] Figure 5 This is a schematic diagram of the paper pressing pulley assembly on the main blade of the pulley-type scraper device for scraping the edge of the plate proposed in this scheme;

[0027] Figure 6 A schematic diagram of the main blade holder of the pulley-type scraper device for scraping the edge of the plate proposed in this scheme;

[0028] Figure 7 A schematic diagram of a paper pressing pulley assembly under a side knife of a pulley-type scraper device for scraping the edge of a plate proposed in this scheme;

[0029] Figure 8 A schematic diagram of a paper pressing pulley assembly on a side knife of a pulley-type scraper device for scraping the edge of a plate proposed in this scheme;

[0030] Fig. 9 A schematic diagram of a side cutter scraper assembly of a pulley scraper device for scraping the edge of a plate proposed in this scheme;

[0031] Fig.10 Schematic diagram of the side blade holder of the pulley scraper device for scraping the edge of the plate proposed in this scheme.

[0032] Among them, 1. Edge cleaning machine, 2. Main scraper for long edge, 3. Scrapers on both sides of short edge, 4. Melamine board;

[0033] 201, main knife lower paper pressing pulley assembly, 202, main knife upper paper pressing pulley assembly, 203, main knife cleaning brush, 204, stretching spring reset assembly, 205, main knife holder;

[0034] 301, side knife lower paper pressing pulley assembly, 302, side knife upper paper pressing pulley assembly, 303, side knife paper scraper assembly, 304, stretch spring reset assembly, 305, side knife holder, 306, side knife cleaning brush;

[0035] 211, pulley frame, 212, rotating sleeve, 213, scraper mounting plate, 214, scraper pressure plate, 215, scraper, 216, spring pull ear, 217, pulley, 218, pulley spring, 219, pulley shaft;

[0036] 220, spring pull plate;

[0037] 231, main knife bottom plate, 232, stop column, 233, spring pull rod, 234, rotating shaft, 235 angle iron;

[0038] 311, side knife connecting plate;

[0039] 321. Side knife bottom plate. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0041] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0042] like Figure 1 — Fig.10 As shown, the scheme provides a novel pulley scraper device for removing excess impregnated paper from the edge of a board in a melamine board veneering process. The utility model is applied to a board edge impregnated paper cleaning machine of a melamine board veneering automatic line.

[0043] The main scraper 2 on the long side is fixedly connected to the sliding trolley of the edge cleaning machine 1 through a screw and is arranged in the center of the edge cleaning machine. It reciprocates back and forth in the edge cleaning machine 1 with the driving motor. The edge cleaning machine uses an existing conventional form of edge cleaning machine, which will not be described in detail in this article. The scrapers 3 on both sides of the short side are fixedly connected to the side knife switching part of the edge cleaning machine 1 frame through a screw. The spacing can be adjusted to match different plate specifications, and the scraping quality can be controlled by adjusting the interference amount between the scrapers 3 on both sides of the short side and the plate. The scrapers 3 on both sides of the short side are divided into two parts: a short side left scraper and a short side right scraper.

[0044] The long side main scraper 2 is composed of a main knife lower paper pressing pulley assembly 201, a main knife upper paper pressing pulley assembly 202, a main knife cleaning brush 203, a tension spring reset assembly 204 and a main knife frame 205. The main knife lower paper pressing pulley assembly 201 is composed of a pulley frame 211, a rotating sleeve 212, a scraper mounting plate 213, a scraper pressing plate 214, a scraper 215, a spring pull ear 216, a pulley 217, a pulley spring 218 and a pulley shaft 219. The rotating sleeve 212 on the main knife lower paper pressing pulley assembly 201 is installed on the rotating shaft 234 of the main knife frame 205 and can rotate around its rotating shaft 234. The rotating shaft 234 is installed with a sealing plate and a fixing bolt. The scraper mounting of the main knife lower paper pressing pulley assembly 201 A spring pull ear 216 is provided on the plate 213 and is connected to the stretch spring hook of the stretch spring reset assembly 204. The movable bolt at the other end of the stretch spring reset assembly 204 is fixed to the spring pull rod 233 of the main tool holder 205 by a nut. When the main tool lower paper pressing pulley assembly 201 is always against the retaining column 232 of the main tool holder 205 for scraping under the pulling force of the stretch spring reset assembly 204, the stretch spring reset assembly 204 can ensure that the main tool lower paper pressing pulley assembly 201 is always close to the edge of the plate and can ensure that the pulley always has a suitable and fixed pressure on the plate to achieve a better scraping effect. In this way, the main tool lower paper pressing pulley assembly 201 can realize the pre-pressure of the impregnated paper on the lower surface of the plate.

[0045] Among them, a pulley is arranged at one end of the paper pressing pulley assembly 201 under the main knife, and the pulley includes: a pulley frame 211, a pulley 217, a pulley spring 218 and a pulley shaft 219, which is used for pre-pressing the impregnated paper on the long side of the front side of the plate. The pulley 217 is installed on the pulley frame 211 through the pulley shaft 219, and the upper bottom surface of the pulley faces upward (the upper bottom surface of the pulley is the bottom surface of the end with a smaller diameter of the pulley). One end of the pulley shaft 219 is fixed with a cotter pin to prevent loosening. When the pulley 217 is scraping the edge, the pulley shaft 219 is used to fix the pulley 217 with the pulley shaft 219 to prevent loosening. 19 is the rotation of the rotating shaft, which is equivalent to the pulley rolling on the edge of the plate, which can reduce friction, reduce the wear of the pulley, and prevent the pulley from scratching the plate. A scraper is arranged at the other end. The scraper includes: a scraper mounting plate 213, a scraper pressing plate 214 and a scraper 215, which is used for scraping the impregnated paper on the long edge of the rear side of the plate. The scraper pressing plate 214 is fixedly connected to the scraper mounting plate 213 by bolts, and the scraper 215 is clamped on the scraper mounting plate 213 by the scraper pressing plate 214.

[0046] Among them, the pulley frame 211 on the paper pressing pulley assembly 201 under the main knife is fixed on the rotating sleeve 212 by welding, and its installation direction is set at a certain inclination angle relative to the axial direction of the rotating sleeve 212, and the overall form of the pulley 217 is a truncated cone, which ensures that the pulley can guide the breaking direction of the excess impregnated paper on the edge of the plate, and ensures that the breaking direction of the excess impregnated paper on the lower surface of the plate is toward the top of the plate, thereby improving the scraping effect.

[0047] Among them, the pulley 217 on the paper pressing pulley assembly 201 under the main knife is provided with pulley springs 218 above and below, which can enable the pulley 217 to slide up and down along the pulley shaft 219, ensuring that when the height of the plate edge changes, the pulley can always contact the plate edge, avoiding the impregnated paper from being scraped cleanly and having burrs and other defects.

[0048] The upper paper pressing pulley assembly 202 of the main knife is connected to the main knife holder 205 in the same manner as the lower paper pressing pulley assembly 201 of the main knife, and together with the tension spring reset assembly 204, realizes the pre-pressing of the impregnated paper on the upper surface of the plate.

[0049] Among them, pulleys are arranged at both ends of the main knife upper paper pressing pulley assembly 202, including: pulley frame 211, pulley 217, pulley spring 218 and pulley shaft 219, which are respectively used for pre-pressing the impregnated paper on the front and rear long sides of the plate. It should be noted that the installation direction of the pulley 217 of the main knife upper paper pressing pulley assembly 202 is opposite to that of the pulley 217 of the main knife lower paper pressing pulley assembly 201, that is, the lower bottom surface of the pulley faces upward (the lower bottom surface of the pulley is the bottom surface of the end with a larger pulley diameter). The inclination direction of the pulley frame 211 of the main knife upper paper pressing pulley assembly 202 relative to the rotating sleeve 212 is opposite to that of the main knife lower paper pressing pulley assembly 201. Through the above arrangement, the excess impregnated paper on the upper surface of the plate can be broken downward. The spring pull plate 220 is welded on the pulley frame 211 and is used to fix the spring reset assembly 204.

[0050] Among them, the main tool holder 205 includes: a main tool base plate 231, a stop column 232, a spring pull rod 233, a rotating shaft 234 and an angle iron 235. The stop column 232, the spring pull rod 233, the rotating shaft 234 and the angle iron 235 are all fixedly connected to the main tool base plate 231 by welding.

[0051] The main tool cleaning brush 203 is installed on the angle iron 235 of the main tool holder 205 by self-tapping screws, and is used to clean paper scraps that fall onto the board surface.

[0052] Among them, the scrapers 3 on both sides of the short sides are composed of a side knife lower paper pressing pulley assembly 301, a side knife upper paper pressing pulley assembly 302, a side knife paper scrap scraper assembly 303, a tension spring reset assembly 304, a side knife frame 305 and a side knife cleaning brush 306.

[0053] The side knife lower paper pressing pulley assembly 301 is composed of a pulley frame 211, a rotating sleeve 212, a side knife connecting plate 311, a spring pull ear 216, a pulley 217, a pulley spring 218 and a pulley shaft 219. The rotating sleeve 212 on the side knife lower paper pressing pulley assembly 301 is installed on the rotating shaft 234 of the side knife frame 305 and can rotate around its rotating shaft 234. The rotating shaft 234 is installed with a sealing plate and a fixing bolt. A spring pull ear 216 is provided on the knife connecting plate 311, and is connected to the stretch spring pull hook of the side knife stretch spring reset assembly 304. The movable bolt at the other end of the side knife stretch spring reset assembly 304 is fixed to the spring pull rod 233 of the side knife frame 305 through a nut. Under the pulling force of the side knife stretch spring reset assembly 304, the side knife lower paper pressing pulley assembly 301 always rests on the blocking column 232 of the side knife frame 305. During the scraping operation, the working principle is the same as that of the main knife.

[0054] Among them, a pulley is arranged at one end of the side knife lower paper pressing pulley assembly 301, including: a pulley frame 211, a pulley 217, a pulley shaft 218 and a pulley spring 219, which is used for pre-pressing the impregnated paper on the short side of the board. The pulley 217 is installed on the pulley frame 211 through the pulley shaft 219, and the upper bottom surface of the pulley faces upward (the upper bottom surface of the pulley is the bottom surface of the end with a smaller pulley diameter). A section of the pulley shaft 219 is fixed with a split pin to prevent loosening. When scraping the edge, the pulley 217 rotates with the pulley shaft 219 as the rotation axis. The working principle is the same as that of the main knife lower paper pressing pulley assembly 201. The other end is provided with a side knife connecting plate 311 and a spring pull ear 216, which are used to connect the side knife tension spring reset assembly 304. The side knife connecting plate 311 and the spring pull ear 216 are fixedly connected to the rotating sleeve 212 by welding.

[0055] Among them, the connection method of the pulley-related components on the side knife lower paper pressing pulley assembly 301 is the same as that of the main knife lower paper pressing pulley assembly 201.

[0056] Among them, the structure of the side knife upper paper pressing pulley assembly 302 is the same as that of the side knife lower paper pressing pulley assembly 301, and the installation direction of its pulley frame 211, pulley 217, pulley spring 218 and pulley shaft 219 is opposite to that of the side knife lower paper pressing pulley assembly 301.

[0057] Among them, the side knife paper scrap scraper assembly 303 includes a rotating sleeve 212, a scraper mounting plate 213, a scraper pressure plate 214, a scraper 215, a spring pull ear 216 and a side knife connecting plate 311. The rotating sleeve 212 is connected to the scraper mounting plate 213 by welding, the rotating sleeve 212 is connected to the side knife connecting plate 311 by welding, the scraper pressure plate 214 is fixedly connected to the scraper mounting plate 214 by bolts, the scraper 215 is clamped and installed on the scraper mounting plate 213 by the scraper pressure plate 214, and the side knife paper scrap scraper assembly 303 is installed as a whole on the rotating shaft 234 of the side knife frame 305.

[0058] Among them, the side knife holder 305 includes: a side knife base plate 321, a stop column 232, a spring pull rod 233, a rotating shaft 234 and an angle iron 235. The stop column 232, the spring pull rod 233, the rotating shaft 234 and the angle iron 235 are all fixedly connected to the side knife base plate 321 by welding.

[0059] The side knife cleaning brush 306 is installed on the angle iron 235 of the side knife holder 305 by self-tapping screws, and is used to clean paper scraps that fall onto the board surface.

[0060] Finally, it should be noted that in the description of the present invention, it should be noted that the terms "upper", "lower", "horizontal", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0061] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0062] The above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

[0063] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pulley scraper device for scraping the edge of a plate, characterized in that: It includes a main scraper on the long side and scrapers on both sides of the short side. The main scraper on the long side is composed of a main knife lower paper pressing pulley assembly, a main knife upper paper pressing pulley assembly, a main knife cleaning brush, a stretching spring reset assembly and a main knife frame. The scrapers on both sides of the short side are composed of a side knife lower paper pressing pulley assembly, a side knife upper paper pressing pulley assembly, a side knife paper scraper assembly, a stretching spring reset assembly, a side knife frame and a side knife cleaning brush. The scrapers on both sides of the short side are divided into a left scraper and a right scraper. The two sides have the same structure and are symmetrically arranged.

2. A pulley scraper device for scraping edges of plates according to claim 1, characterized in that: The long-side main scraper includes four sets of pulley devices, which are respectively used for pre-pressing excess impregnated paper on the upper and lower surfaces of the plate, and also includes two sets of scraper devices, which are used for scraping off broken paper scraps on the plate.

3. A pulley scraper device for scraping the edge of a plate according to claim 2, characterized in that: The side scraper comprises two sets of pulley devices, which are respectively used for pre-pressing the excess impregnated paper on the upper and lower surfaces of the plate, and also comprises a set of scraper devices, which are used for scraping off the broken paper scraps on the plate.

4. A pulley-type scraper device for scraping edges of plates according to claim 3, characterized in that: The scrapers on both sides of the short side are divided into a left scraper and a right scraper, and are symmetrically arranged on both sides.

5. A pulley scraper device for scraping edges of plates according to claim 4, characterized in that: The scraper is provided with a tension spring return assembly.

6. A pulley scraper device for scraping the edge of a plate according to claim 5, characterized in that: The pulley is in a truncated cone shape, and springs are arranged on both sides of the pulley. The springs are installed on the pulley shaft. The pulley can rotate around the pulley shaft, and the pulley can also slide axially along the pulley shaft.

7. A pulley scraper device for scraping the edge of a plate according to claim 6, characterized in that: The pulley frame is set at a certain inclination angle relative to the main tool holder or the side tool holder rotating shaft.

8. A pulley-type scraper device for scraping edges of plates according to claim 7, characterized in that: The scraper is provided with a cleaning brush.

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