Automatic number plate lining paper cutting assembly

Abstract

The utility model discloses a license plate interleaving paper automatic cutting assembly, a main body plate is provided with an air expansion shaft used for placing a paper roll and a paper feeding compression roller set used for feeding paper, an interleaving paper temporary storage bin assembly is arranged below the air expansion shaft, the interleaving paper temporary storage bin assembly comprises a temporary storage bin, a guide roller and a gravity lower compression roller, the guide roller is arranged in the temporary storage bin, and the gravity lower compression roller is arranged below the guide roller. A vertical guide part is arranged on the bin wall of the temporary storage bin, the gravity lower pressing roller is slidably connected with the temporary storage bin through the vertical guide part, a proximity switch is fixed to the bottom of the temporary storage bin, and when the gravity lower pressing roller slides to the lower end along the vertical guide part, the proximity switch acts, so that the air expansion shaft stops rotating for unwinding. According to the automatic cutting assembly for the license plate lining paper, the working rhythm of paper delivery and the working rhythm of the paper feeding compression roller set are matched, the equipment efficiency is improved, and the phenomenon that paper delivery is not in place is avoided.

Description

Technical Field

[0001] This utility model relates to the technical field of liner paper conveying and cutting equipment, specifically to an automatic cutting assembly for license plate liner paper. Background Technology

[0002] During the production of vehicle license plates, information needs to be endorsed to facilitate the management of the plates. After the endorsement is completed, the plates are collected in a box, and a layer of isolation paper (sometimes called liner paper or padding paper) is required between adjacent plates to prevent the plates from sticking together when stacked.

[0003] While existing automated paper-feeding and cutting equipment is more accurate and efficient than manual cutting and placement of paper, it still has some drawbacks. For example, Chinese utility model patent publication number CN 222593019U discloses a vehicle license plate paper conveying device. Its air shaft (sometimes called an air-expanding shaft) operates synchronously with the paper-feeding pressure roller group (upper and lower rollers). However, the diameter of the paper roll on the air shaft gradually changes. If the unwinding motor speed is constant, as the amount of paper on the roll decreases, the diameter of the roll decreases, but the motor's rotation speed remains the same. This results in less paper output, failing to meet the needs of the paper-feeding pressure roller group, leading to incomplete paper output. Furthermore, the diameter of the paper roll is difficult to measure accurately using simple sensing methods.

[0004] In addition, the gap between the upper and lower rollers can be adjusted by adjusting the position of the limit bolts, but this is inconvenient and time-consuming to adjust each time. Furthermore, the paper roll sometimes tilts, which can lead to inaccurate paper feeding or even cause the paper roll to scatter.

[0005] During the paper feeding process, some paper segments, after being cut and fed out, are affected by their original coiled state and automatically curl into a roll after being fed out, thus failing to provide protection or isolation.

[0006] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0007] In view of the above-mentioned defects in the prior art, the technical problem to be solved by this utility model is to provide an automatic cutting assembly for license plate backing paper, so that the working rhythm of paper output and paper feeding pressure roller group is matched, thereby improving equipment efficiency and avoiding the phenomenon of incomplete paper output and self-curling of backing paper.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0009] An automatic cutting assembly for license plate backing paper includes a main plate, on which an air shaft for holding paper rolls and a paper feeding pressure roller assembly for feeding paper are mounted.

[0010] Below the air shaft is a paper buffer bin assembly, which includes a buffer bin, a guide roller, and a gravity-pressure roller. The guide roller is installed inside the buffer bin, and a vertical guide is provided on the wall of the buffer bin. The gravity-pressure roller is slidably connected to the buffer bin through the vertical guide. A proximity switch is fixed at the bottom of the buffer bin. When the gravity-pressure roller slides along the vertical guide to the lower end, the proximity switch is activated, thereby stopping the air shaft from rotating and unwinding.

[0011] Preferably, the vertical guide is a long vertical guide hole, which is formed on the two opposite walls of the buffer compartment.

[0012] Preferably, the paper feeding pressure roller group includes a first pressure roller and a second pressure roller. The second pressure roller has an oblique protrusion in the middle, and the first pressure roller has an oblique recess in the middle that matches the oblique protrusion. When the first pressure roller and the second pressure roller are in contact, the oblique protrusion and the oblique recess cooperate to press out an anti-curling vertical groove in the middle of the paper to prevent the paper from curling.

[0013] Preferably, the first adhesive roller is slidably connected to the main body plate, the second adhesive roller is rotatably mounted on the main body plate, the first power device pushes the first adhesive roller to abut against the second adhesive roller, and the second power device drives the second adhesive roller to rotate.

[0014] Preferably, the first power device is a cylinder, the cylinder body is mounted on the main body plate by a fixing plate, and the piston rod of the cylinder is connected to the first rubber roller by a connecting bracket.

[0015] Preferably, the second power unit includes a motor, a driving pulley, a driven pulley, and a synchronous belt. The output shaft of the motor is fixedly connected to the driving pulley, one end of the second rubber roller is fixedly connected to the driven pulley, and the synchronous belt is wound between the driving pulley and the driven pulley.

[0016] Preferably, the main body plate is equipped with a paper cutting mechanism for cutting paper. The paper cutting mechanism is located below the air shaft and above the buffer compartment. The paper cutting mechanism includes a fixed cutter and a movable cutter. One end of the movable cutter is hinged to the fixed cutter, and the other end of the movable cutter is connected to a cutting cylinder. The cutting cylinder drives the movable cutter to open and close relative to the fixed cutter to perform cutting. The main body plate is provided with an auxiliary cutting component. During cutting, the auxiliary cutting component pulls the movable cutter against the fixed cutter. The direction in which the auxiliary cutting component pulls the movable cutter is perpendicular to the direction in which the cutting cylinder drives the movable cutter.

[0017] Preferably, the cutting cylinder includes a cylinder rod, and the other end of the movable cutter is connected to the cylinder rod via a floating joint.

[0018] Assuming the liner paper is conveyed from upstream to downstream, the fixed cutter and the movable cutter are located downstream of the paper feeding pressure roller assembly, with the movable cutter located downstream of the fixed cutter.

[0019] The auxiliary cutting assembly includes a fixing pin, a spring, and a spring connecting plate. The spring connecting plate is connected to the cylinder rod, the fixing pin is fixed to the main body plate, and the two ends of the spring are respectively connected to the fixing pin and the cylinder rod. The direction of the spring's pull is perpendicular to the direction of the cylinder rod's extension. The spring pulls the movable cutter upstream to abut against the fixed cutter.

[0020] Preferably, the air shaft is provided with a paper roll baffle assembly, the paper roll baffle assembly includes a fixed baffle and a movable baffle, the fixed baffle is fixed to the air shaft and close to the free end of the air shaft, and the movable baffle is adjustable in axial position relative to the air shaft.

[0021] Preferably, the movable baffle includes a connecting sleeve portion and a disc portion. The connecting sleeve portion is fitted onto the air shaft, and a flange sleeve is fitted onto the connecting sleeve portion. One end of the flange sleeve is fixed to the main body plate. The connecting sleeve portion and the flange sleeve are connected by an adjusting elongated hole, a round hole, and an adjusting bolt.

[0022] The beneficial effects of this utility model after adopting the above technical solution are:

[0023] This utility model discloses an automatic cutting assembly for license plate backing paper. A backing paper buffer assembly is located below the air shaft. The buffer assembly includes a buffer bin, a guide roller, and a gravity-feeding roller. The guide roller is installed inside the buffer bin, and vertical guides are provided on the bin wall. The gravity-feeding roller is slidably connected to the buffer bin via the vertical guides. A proximity switch is fixed at the bottom of the buffer bin. When the gravity-feeding roller slides along the vertical guides to its lower end, the proximity switch activates, causing the air shaft to stop rotating and unwinding. During operation, the paper roll is mounted on the air shaft, which drives the paper roll to unwind. The backing paper wraps around the gravity-feeding roller and then enters the paper feeding roller assembly, where it is conveyed downstream.

[0024] In the above process, because the liner paper is wrapped around the gravity-driven pressure roller, the gravity-driven pressure roller moves downward along the vertical guide, thereby pulling down the liner paper and pre-buffering a section of the liner paper in the buffer bin. This achieves pre-unwinding, ensuring that even as the paper roll dwindles, there will be no shortage of paper to meet the working needs of the paper feeding roller group. This matches the working rhythm of the paper output with that of the paper feeding roller group, preventing incomplete paper output. When the gravity-driven pressure roller slides to the lower end of the buffer bin, it is sensed by a proximity switch, which then activates, causing the air shaft to stop rotating and unwind.

[0025] The air shaft is equipped with a paper roll baffle assembly, which can prevent the paper roll from tilting, inaccurate paper feeding position, and paper roll from scattering.

[0026] The cylinder pushes the connecting bracket, causing the first adhesive roller to press against the second adhesive roller, thus adjusting the gap between them. This is more convenient and faster than adjusting the gap using limit bolts in existing technologies.

[0027] The second glue roller has a slanted protrusion in the middle, and the first glue roller has a slanted recess in the middle that matches the protrusion. When the first and second glue rollers are in contact, the slanted protrusion and recess work together to press the middle of the passing liner paper into an anti-curling vertical groove that prevents the liner paper from curling. The anti-curling vertical groove extends along the length of the liner paper. The anti-curling vertical groove can maintain the shape of the liner paper after it exits the paper, preventing the liner paper from curling on its own and causing the protection to fail. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the new model brand liner paper automatic cutting assembly;

[0029] Figure 2 yes Figure 1 A schematic diagram of the automatic license plate backing paper cutting assembly without the side baffle;

[0030] Figure 3 yes Figure 1 The side view of the automatic cutting assembly for license plate backing paper in the middle, with the side panel of the compartment hidden;

[0031] Figure 4 yes Figure 1 Another structural diagram of the automatic license plate backing paper cutting assembly;

[0032] Figure 5 This is a schematic diagram of the backing paper roll placed on the automatic cutting assembly for license plate backing paper;

[0033] In the diagram: 200, main body plate; 201, air shaft; 2011, first motor; 2012, reducer; 2021, buffer bin; 20221, first guide roller; 20222, second guide roller; 2023, gravity-driven pressure roller; 2024, proximity switch; 20211, vertical elongated guide hole; 2001, bin side plate; 2002, bin bottom plate; 2031, first adhesive roller; 2032, second adhesive roller; 20321, oblique protrusion; 20311, oblique recess; 2033, cylinder; 2003, connecting bracket; 2 041. Second motor; 2042. Drive pulley; 2043. Driven pulley; 2045. Synchronous belt; 2051. Fixed cutter; 2052. Movable cutter; 2053. Cutting cylinder; 2004. Clearance hole; 206. Floating joint; 2071. Fixed pin; 2072. Spring; 2073. Spring connecting plate; 2081. Fixed baffle; 2082. Movable baffle; 2083. Adjustable oblong hole; 2084. Circular hole; 20223. First auxiliary guide roller; 20224. Second auxiliary guide roller; 3. Paper roll. Detailed Implementation

[0034] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments to further understand the purpose, solution and effect of this utility model, but it is not intended to limit the scope of protection of the appended claims of this utility model.

[0035] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "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 utility model 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 utility model.

[0036] Furthermore, although terms such as first, second, third, etc., may be used in this document to describe multiple elements, components, regions, layers, and / or segments, these elements, components, regions, layers, and / or segments should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or segment from another. Unless the context clearly indicates otherwise, terms such as "first," "second," and other numerical terms used in this document do not imply order or sequence. Therefore, the first element, component, region, layer, or segment discussed below may be referred to as the second element, component, region, layer, or segment without departing from the teachings of the exemplary embodiments.

[0037] For ease of description, we Figures 1 to 4The above assumes reference coordinates, but the setting of reference coordinates should not be construed as a limitation of this utility model.

[0038] like Figures 1 to 4 The automatic cutting assembly for license plate backing paper shown includes a main plate 200. An air shaft 201 for holding a paper roll 3 and a paper feeding roller assembly are mounted on the main plate 200. A power unit for driving the air shaft 201 to rotate is fixed on the main plate 200. The power unit includes a first motor 2011 and a reducer 2012. The air shaft 201, the first motor 2011, and the reducer 2012 are all located near the top of the main plate 200. Specifically, one end of the air shaft 201 is connected to the reducer 2012, and the reducer 2012 is connected to the first motor 2011. The paper roll 3 is sleeved on the air shaft 201, which supports and drives the paper roll 3 to rotate for unwinding.

[0039] Below the air shaft 201 is a paper liner buffer assembly, which includes a buffer 2021, two guide rollers and a gravity pressing roller 2023. Both the guide roller and the gravity pressing roller include a mandrel and a roller body. The roller body is sleeved outside the mandrel and rotates relative to the mandrel. Both ends of the mandrel extend out of the roller body. Two spaced fixing rings are fixed on the roller body. The two fixing rings are used to restrict the two sides of the paper liner and prevent the paper liner from deviating.

[0040] The guide roller is installed inside the buffer chamber 2021. The two ends of the guide roller's spindle are fixed to two opposite side walls of the buffer chamber 2021. The two guide rollers are the first guide roller 20221 and the second guide roller 20222. Vertical guide members are provided on the walls of the buffer chamber 2021. The gravity pressure roller 2023 is slidably connected to the buffer chamber 2021 through the vertical guide members. A proximity switch 2024 is fixed at the bottom of the buffer chamber 2021. When the gravity pressure roller 2023 slides to the lower end along the vertical guide members, it will be sensed by the proximity switch 2024. Then the proximity switch 2024 will activate and control the output shaft of the first motor 2011 to stop rotating, thereby stopping the air shaft 201 from rotating and unwinding.

[0041] In some embodiments: the vertical guide is a vertical elongated guide hole 20211, which is opened on two opposite walls of the buffer compartment 2021. The vertical elongated guide hole 20211 allows the spindle of the gravity-driven pressure roller 2023 to slide.

[0042] Of course, the vertical guide can also be set as a guide rail, with guide grooves on the guide rail for sliding at both ends of the mandrel of the gravity-driven pressure roller 2023. Other structures can also be used for the vertical guide.

[0043] The paper feeding pressure roller group and the paper cutting mechanism are located at the paper feeding and cutting chamber. The paper feeding and cutting chamber is provided with a chamber side plate 2001 opposite to the main body plate 200 and a chamber bottom plate 2002 that is fixedly connected to the main body plate 200 and the chamber side plate 2001.

[0044] In some embodiments: the paper feeding pressure roller group is located in the paper feeding and cutting chamber, and the paper feeding pressure roller group includes a first adhesive pressure roller 2031 and a second adhesive pressure roller 2032, that is, both ends of the first adhesive pressure roller 2031 and the second adhesive pressure roller 2032 are respectively connected and installed on the main body plate 200 and the chamber side plate 2001.

[0045] The first glue roller 2031 is slidably connected to the main body plate 200. The main body plate 200 and the side plate 2001 of the silo are respectively provided with vertical elongated holes (the length of the holes is along the Z direction). The two ends of the first glue roller 2031 can slide relative to the vertical elongated holes.

[0046] The first adhesive roller 2031 includes a first central shaft and a first outer roller body. A bearing is installed between the first outer roller body and the first central shaft. The first outer roller body rotates relative to the first central shaft. Both ends of the first central shaft extend out of the first outer roller body. A portion of material (i.e., both ends of the first outer roller body) is removed from the protruding ends of the two first central shafts to accommodate the width of the aforementioned vertical elongated hole. The second adhesive roller 2032 includes a second central shaft and a second outer roller body. The second outer roller body is sleeved on the second central shaft, and the two are fixed together.

[0047] The second glue roller 2032 is rotatably mounted on the main body plate 200. The first power device pushes the first glue roller 2031 to stick to the second glue roller 2032, and the second power device drives the second glue roller 2032 to rotate.

[0048] The first power unit is a cylinder 2033. The cylinder body of the cylinder 2033 is mounted on the main body plate 200 via a fixing plate. The piston rod of the cylinder 2033 is connected to the first rubber roller 2031 via a connecting bracket 2003. The connecting bracket 2003 is a U-shaped bracket and includes a cylinder bracket plate and roller connecting ears. Two roller connecting ears are fixed to both ends of the cylinder bracket plate, and the cylinder bracket plate is fixedly connected to the piston rod of the cylinder. The roller connecting ears have mounting holes, and both ends of the first rubber roller 2031 are inserted into the mounting holes. The cylinder pushes the connecting bracket 2003, causing the first rubber roller 2031 to come into contact with the second rubber roller 2032, thus adjusting the gap between the first rubber roller 2031 and the second rubber roller 2032. This is more convenient and faster than adjusting the gap by adjusting the limit bolts in the prior art.

[0049] like Figure 4As shown, the second glue roller 2032 has an oblique protrusion 20321 in the middle, and the first glue roller 2031 has an oblique recess 20311 in the middle that matches the oblique protrusion 20321. When the first glue roller 2031 and the second glue roller 2032 are in contact, the oblique protrusion 20321 and the oblique recess 20311 cooperate to press out an anti-curling vertical groove in the middle of the passing liner paper to prevent the liner paper from curling. The anti-curling vertical groove extends along the length of the liner paper. The anti-curling vertical groove can maintain the shape of the liner paper after it exits the paper and prevent the liner paper from curling on its own, thus preventing the protection from failing.

[0050] like Figure 2 and Figure 3 As shown, the second power unit includes a second motor 2041, a driving pulley 2042, a driven pulley 2043, and a synchronous belt 2045. The output shaft of the second motor 2041 is fixedly connected to the driving pulley 2042, and one end of the second rubber roller 2032 is fixedly connected to the driven pulley 2043. The synchronous belt 2045 is wound between the driving pulley 2042 and the driven pulley 2043.

[0051] A paper-cutting mechanism for cutting paper is installed on the main plate 200. The paper-cutting mechanism is located below the air shaft 201 and above the buffer chamber 2021. The paper-cutting mechanism includes a fixed cutter 2051 and a movable cutter 2052. One end of the movable cutter 2052 is hinged to the fixed cutter 2051, and the other end of the movable cutter 2052 is connected to a cutting cylinder 2053. A clearance hole 2004 is provided on the main plate 200 to avoid the movable cutter 2052. The cutting cylinder 2053 drives the movable cutter 2052 to open and close relative to the fixed cutter 2051 to perform cutting. The working principle of the fixed cutter 2051 and the movable cutter 2052 when cutting paper is similar to that of a guillotine.

[0052] An auxiliary cutting component is provided on the main plate 200. When cutting, the auxiliary cutting component pulls the movable cutter 2052 to abut against the fixed cutter 2051. The direction in which the auxiliary cutting component pulls the movable cutter 2052 is perpendicular to the direction in which the cutting cylinder 2053 drives the movable cutter 2052.

[0053] In some embodiments, the cutting cylinder 2053 includes a cylinder body and a cylinder rod. The cylinder body is fixed to the main body plate 200 by a bracket. The other end of the movable cutter 2052 is connected to the cylinder rod via a floating joint 206, thereby preventing the cylinder rod from being bent or broken by the spring 2072 after long-term use. Assuming the backing paper is conveyed from upstream to downstream, the fixed cutter 2051 and the movable cutter 2052 are located downstream of the paper feeding pressure roller assembly, with the movable cutter 2052 located downstream of the fixed cutter 2051.

[0054] The auxiliary cutting component includes a fixing pin 2071, a spring 2072, and a spring connecting plate 2073. The spring connecting plate 2073 is connected to the cylinder rod. The fixing pin 2071 is fixed on the main body plate 200. The two ends of the spring 2072 are connected to the fixing pin 2071 and the cylinder rod, respectively. The direction in which the spring 2072 is pulled is perpendicular to the direction in which the cylinder rod extends. The spring 2072 pulls the movable cutter 2052 upstream to abut the fixed cutter 2051.

[0055] The cutting cylinder 2053 pushes and pulls the movable cutter 2052 to open and close along the Z-axis, and the spring 2072 pulls the cylinder rod in the negative Y-axis direction, so that the movable cutter 2052 is in contact with the fixed cutter 2051 in the negative Y-axis direction.

[0056] In some embodiments, such as Figure 4 As shown, a paper roll baffle assembly is provided on the air shaft 201. The paper roll baffle assembly includes a fixed baffle 2081 and a movable baffle 2082. The fixed baffle 2081 is fixed to the air shaft 201 and close to the free end of the air shaft 201. The axial position of the movable baffle 2082 relative to the air shaft 201 is adjustable. When the axial dimension (width) of the paper roll 3 changes, the movable baffle 2082 can be moved according to the axial dimension of the paper roll 3. The paper roll baffle assembly can prevent the paper roll from skewing, inaccurate paper feeding position, and paper roll scattering.

[0057] The movable baffle 2082 includes a connecting sleeve part and a disc part. The connecting sleeve part is fitted onto the air shaft 201. A flange sleeve is fitted onto the connecting sleeve part. One end of the flange sleeve is fixed to the main body plate 200. The connecting sleeve part and the flange sleeve are connected by adjusting the elongated hole 2083, the round hole 2084 and the adjusting bolt.

[0058] A paper roll depletion fiber optic sensor can be installed on either the fixed baffle 2081 or the movable baffle 2082 to remind the user to replace the paper roll when it is depleted.

[0059] The flange sleeve has an adjusting elongated hole 2083, and the connecting sleeve has a round hole. The adjusting bolts are used to fix the flange sleeve and the movable baffle 2082 through the adjusting elongated hole 2083 and the round hole. Of course, the adjusting elongated hole 2083 can also be located on the connecting sleeve, and the round hole can be located on the flange sleeve.

[0060] Auxiliary guide rollers, namely a first auxiliary guide roller 20223 and a second auxiliary guide roller 20224, are fixed on the main plate 200. The auxiliary guide rollers are located above the buffer bin 2021. The first auxiliary guide roller 20223 is located upstream of the buffer bin 2021 and downstream of the air shaft 201, and the second auxiliary guide roller 20224 is located downstream of the buffer bin 2021 and upstream of the paper feeding pressure roller group. Furthermore, the second auxiliary guide roller 20224 is close to the paper feeding pressure roller group.

[0061] like Figure 5 As shown, the paper roll 3 is mounted on the air shaft 201. One end of the liner paper passes sequentially through the first auxiliary guide roller 20223, the first guide roller 20221, the gravity pressure roller 2023, the second guide roller 20222, and the second auxiliary guide roller 20224. Then, the liner paper enters the paper feeding roller group and is driven downstream by the first glue roller 2031 and the second glue roller 2032. During the above process, the liner paper is wrapped around the gravity pressure roller 2023. The gravity pressure roller 2023 moves downward along the vertical long guide hole 20211, thereby pulling the liner paper downward and driving the paper roll 3 to rotate. A section of the liner paper is pre-buried in the buffer bin 2021, realizing pre-unwinding. Even as the paper on the paper roll decreases, there will be no shortage of paper to meet the working needs of the paper feeding roller group. This ensures that the paper output matches the working rhythm of the paper feeding roller group, avoiding the phenomenon of incomplete paper output.

[0062] When the gravity-driven pressure roller 2023 slides to the lower end along the vertical guide, it will be sensed by the proximity switch 2024. Then the proximity switch 2024 will activate, thereby stopping the air shaft 201 from rotating and unwinding.

[0063] This utility model is not limited to the above embodiments. All improvements made based on the concept, principle, structure and method of this utility model are within the protection scope of this utility model.

Claims

1. An automatic cutting assembly for license plate backing paper, comprising a main body plate, wherein an air shaft for placing paper rolls and a paper feeding pressure roller assembly for feeding paper are mounted on the main body plate, characterized in that: Below the air shaft is a paper buffer bin assembly, which includes a buffer bin, a guide roller, and a gravity-pressure roller. The guide roller is installed inside the buffer bin, and a vertical guide is provided on the wall of the buffer bin. The gravity-pressure roller is slidably connected to the buffer bin through the vertical guide. A proximity switch is fixed at the bottom of the buffer bin. When the gravity-pressure roller slides along the vertical guide to the lower end, the proximity switch is activated, thereby stopping the air shaft from rotating and unwinding.

2. The automatic license plate backing paper cutting assembly as described in claim 1, characterized in that: The vertical guide is a long vertical guide hole, which is formed on the two opposite walls of the buffer compartment.

3. The automatic license plate backing paper cutting assembly as described in claim 1, characterized in that: The paper feeding pressure roller assembly includes a first pressure roller and a second pressure roller. The second pressure roller has an oblique protrusion in the middle, and the first pressure roller has an oblique recess in the middle that matches the oblique protrusion. When the first pressure roller and the second pressure roller are in contact, the oblique protrusion and the oblique recess cooperate to press out an anti-curling vertical groove in the middle of the paper to prevent the paper from curling.

4. The automatic license plate backing paper cutting assembly as described in claim 3, characterized in that: The first adhesive roller is slidably connected to the main body plate, and the second adhesive roller is rotatably mounted on the main body plate. A first power device pushes the first adhesive roller to come into contact with the second adhesive roller, and a second power device drives the second adhesive roller to rotate.

5. The automatic license plate backing paper cutting assembly as described in claim 4, characterized in that: The first power unit is a cylinder, the cylinder body of which is mounted on the main body plate via a fixing plate, and the piston rod of which is connected to the first rubber roller via a connecting bracket.

6. The automatic license plate backing paper cutting assembly as described in claim 5, characterized in that: The second power unit includes a motor, a driving pulley, a driven pulley, and a synchronous belt. The output shaft of the motor is fixedly connected to the driving pulley, one end of the second rubber roller is fixedly connected to the driven pulley, and the synchronous belt is wound between the driving pulley and the driven pulley.

7. The automatic license plate backing paper cutting assembly as described in claim 1, characterized in that: A paper-cutting mechanism is installed on the main body plate. The paper-cutting mechanism is located below the air shaft and above the buffer chamber. The paper-cutting mechanism includes a fixed cutter and a movable cutter. One end of the movable cutter is hinged to the fixed cutter, and the other end of the movable cutter is connected to a cutting cylinder. The cutting cylinder drives the movable cutter to open and close relative to the fixed cutter to perform cutting. An auxiliary cutting component is provided on the main body plate. During cutting, the auxiliary cutting component pulls the movable cutter against the fixed cutter. The direction in which the auxiliary cutting component pulls the movable cutter is perpendicular to the direction in which the cutting cylinder drives the movable cutter.

8. The automatic license plate backing paper cutting assembly as described in claim 7, characterized in that: The cutting cylinder includes a cylinder rod, and the other end of the movable cutter is connected to the cylinder rod via a floating joint. Assuming the liner paper is conveyed from upstream to downstream, the fixed cutter and the movable cutter are located downstream of the paper feeding pressure roller assembly, with the movable cutter located downstream of the fixed cutter. The auxiliary cutting assembly includes a fixing pin, a spring, and a spring connecting plate. The spring connecting plate is connected to the cylinder rod, the fixing pin is fixed to the main body plate, and the two ends of the spring are respectively connected to the fixing pin and the cylinder rod. The direction of the spring's pull is perpendicular to the direction of the cylinder rod's extension. The spring pulls the movable cutter upstream to abut against the fixed cutter.

9. The automatic license plate backing paper cutting assembly as described in claim 1, characterized in that: A paper roll baffle assembly is provided on the air shaft. The paper roll baffle assembly includes a fixed baffle and a movable baffle. The fixed baffle is fixed to the air shaft and close to the free end of the air shaft. The axial position of the movable baffle relative to the air shaft is adjustable.

10. The automatic license plate backing paper cutting assembly as described in claim 9, characterized in that: The movable baffle includes a connecting sleeve portion and a disc portion. The connecting sleeve portion is fitted onto the air shaft, and a flange sleeve is fitted onto the connecting sleeve portion. One end of the flange sleeve is fixed to the main body plate. The connecting sleeve portion and the flange sleeve are connected by an adjusting elongated hole, a round hole, and an adjusting bolt.

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