Knurling device for paper conveying belt

Abstract

The utility model relates to the field of printing equipment, and particularly discloses a knurling device for a paper conveying belt, the knurling device comprises a support, a fixing mechanism, a tension adjusting mechanism and a knurling mechanism, the fixing mechanism is used for fixing the paper conveying belt, the tension adjusting mechanism is used for adjusting the tension of the paper conveying belt, and the knurling mechanism is used for pressing patterns on the paper conveying belt. According to the knurling device, the effects of improving the knurling quality of the paper conveying belt and ensuring the definition and uniformity of patterns are achieved, the tension of the paper conveying belt can be adjusted according to needs, and the knurling process is more stable and reliable.

Description

Technical Field

[0001] The present application relates to the field of printing equipment, and in particular to a knurling device for a paper conveyor belt. Background Art

[0002] Currently, in the tobacco packaging industry, cigarette box paper is transported by a paper feeder during the printing process to ensure the paper moves in a prescribed direction. As the equipment operates for an extended period of time, the paper feeder inevitably wears out, which not only affects the stable transportation of paper but also increases production costs. To address this issue, the industry is constantly seeking improvements to enhance the performance and service life of the paper feeder, thereby reducing production costs and improving efficiency.

[0003] Currently, workers usually grind the replaced paper conveyor belt to make the side walls of the belt smooth, which can provide more uniform friction for the paper and facilitate the transportation of the paper.

[0004] The above-mentioned related technologies have the following defects: the side wall of the paper conveying belt is relatively smooth after grinding, and the friction force applied to the paper during the paper transportation process is relatively small, so the paper is prone to slipping during the paper transportation process. Utility Model Content

[0005] In order to prevent the ground paper conveyor belt from slipping during paper conveying, the present application provides a knurling device for the paper conveyor belt.

[0006] The present application provides a knurling device for a paper conveyor belt adopting the following technical solution:

[0007] A knurling device for a paper feed belt comprises a bracket, a fixing mechanism, a tension adjustment mechanism and a knurling mechanism, wherein the fixing mechanism is mounted on the bracket and is used to fix the paper feed belt; the tension adjustment mechanism is mounted on the bracket and is used to adjust the tension of the paper feed belt; the knurling mechanism is mounted on the bracket and is used to emboss a pattern on the paper feed belt.

[0008] By adopting the above technical solution, the ground paper conveyor belt is fixed to the fixing mechanism. The knurling device of the paper conveyor belt can effectively emboss the paper conveyor belt, increasing the friction between the paper conveyor belt and the paper, thereby ensuring the stability of the paper during transportation. The fixing mechanism is installed through a bracket and is used to fix the paper conveyor belt, ensuring the stable position of the paper conveyor belt during processing. The tension adjustment mechanism is used to adjust the tension of the paper conveyor belt, ensuring uniform pressure during the knurling process and improving the knurling quality. The knurling mechanism can emboss the paper conveyor belt, enhance friction, and improve paper transportation.

[0009] Preferably, the fixing mechanism includes a driving wheel and multiple driven wheels, the driving wheel and the multiple driven wheels are coplanar and can be rotatably mounted on the bracket; the driving wheel and the multiple driven wheels are spaced apart, and the axis of the driving wheel and the axes of the multiple driven wheels are parallel to each other.

[0010] By adopting the above technical solution, after the annular paper feed belt is put on the driving wheel and multiple driven wheels, the tension adjustment mechanism is used to adjust the tension of the paper feed belt, so that the paper feed belt is in a good tensioning state between the driving wheel and the multiple driven wheels, and there is effective friction between the paper feed belt and the driving wheel and the multiple driven wheels, so that the driving wheel and the multiple driven wheels can effectively support the paper feed belt and ensure its smooth transmission, which is beneficial for the knurling device to stably extrude patterns on the paper feed belt, thereby improving the quality and efficiency of knurling.

[0011] Preferably, the side walls of the driving wheel and the plurality of driven wheels are provided with anti-slip patterns.

[0012] By adopting the above technical solution, the side walls of the driving wheel and multiple driven wheels are provided with anti-slip grooves, which increases the friction between the paper feed belt and the driving wheel and the driven wheels, thereby improving the stability of the paper feed belt in the equipment, ensuring that the paper feed belt is not easy to slip during the knurling process, and effectively improving the knurling quality.

[0013] Preferably, the tension adjustment mechanism includes a pressure wheel and two reversing wheels, the axis of the pressure wheel and the axis of the reversing wheel are parallel to the axis of the driving wheel; the pressure wheel and the reversing wheel are both arranged on the side of the fixing mechanism and are coplanar with the driving wheel; the pressure wheel is arranged between the two reversing wheels and can move toward the fixing mechanism.

[0014] By adopting the above technical solution, after the paper feed belt is wound around the driving wheel and multiple driven wheels, the paper feed belt is passed between the pressure wheel and two reversing wheels. The pressure wheel moves toward the fixing mechanism, pressing the paper feed belt toward the fixing mechanism, and then adjusting the tension of the paper feed belt to ensure that the paper feed belt maintains appropriate tension during the knurling process, thereby improving the knurling quality and efficiency.

[0015] Preferably, the tension adjustment mechanism further includes a first telescopic member, a first end of the first telescopic member is connected to the bracket, and a second end of the first telescopic member is connected to the pressure wheel.

[0016] By adopting the above technical solution, the first telescopic member can drive the pressure wheel to move toward the fixing mechanism, thereby adjusting the tension of the paper feed belt, ensuring that the paper feed belt remains stable during the knurling process, and improving the knurling quality.

[0017] Preferably, the tension adjustment mechanism further comprises a movable bracket, a pressure sensor is connected between the movable bracket and the second end of the first telescopic member; the pressure wheel is rotatably mounted on an end of the movable bracket away from the pressure sensor.

[0018] By adopting the above technical solution, a pressure sensor is connected between the movable bracket and the second end of the first telescopic member, which can monitor and adjust the pressure of the pressure wheel on the paper feed belt in real time, ensure that the tension of the paper feed belt on the fixing mechanism is uniform, and improve the knurling quality; the pressure wheel is rotatably mounted on the end of the movable bracket away from the pressure sensor, so that the pressure wheel can reduce the friction between the pressure wheel and the paper feed belt while applying pressure to the paper feed belt, thereby extending the service life of the pressure wheel.

[0019] Preferably, the knurling mechanism includes a hot pressing roller assembly and a telescopic assembly, the first end of the telescopic assembly is mounted on the bracket; the hot pressing roller assembly and the second end of the telescopic assembly are connected, and the telescopic assembly is used to drive the hot pressing roller assembly to move toward the driving wheel; the hot pressing roller assembly is used to emboss a pattern on the paper feed belt at the driving wheel.

[0020] By adopting the above technical solution, the hot pressing roller assembly in the knurling mechanism can emboss a pattern on the paper feed belt at the driving wheel, thereby increasing the friction of the side wall of the paper feed belt; the telescopic assembly drives the hot pressing roller assembly to move toward the driving wheel, thereby achieving effective knurling of the paper feed belt and ensuring the uniformity and stability of the pattern.

[0021] Preferably, a slide groove is provided on the bracket, and the telescopic assembly includes a slider and a second telescopic member, the slider is arranged in the slide groove and is slidably connected to the bracket through the slide groove; the second telescopic member is arranged along the length direction of the slide groove, and one end is connected to the slider and the other end is connected to the bracket; the hot pressing roller assembly is installed on the slider.

[0022] By adopting the above technical solution, a slide groove, a slider and a second telescopic part are set, so that the hot pressing roller assembly can move smoothly along the slide groove, ensuring that the position of the hot pressing roller assembly is stable during the process of extruding patterns on the paper feed belt, thereby improving the knurling accuracy and consistency; the setting of the second telescopic part facilitates the adjustment of the position of the hot pressing roller assembly, thereby adapting to paper feed belts of different thicknesses and improving the applicability of the device.

[0023] Preferably, the hot pressing roller assembly includes a rotating tube, a heating element, a second motor, a driving gear and a driven gear. The axis of the rotating tube is parallel to the axis of the driving wheel. The rotating tube is rotatably mounted on the slider. The outer wall of the rotating tube is provided with a molded pattern. One end of the heating element is arranged in the rotating tube, and the other end is connected to the slider. The second motor is mounted on the slider, and the driving gear is connected to the second motor. The driven gear is coaxially mounted on the rotating tube and meshes with the driving gear.

[0024] By adopting the above technical solution, the axis of the rotating tube is parallel to the axis of the driving wheel and is rotatably installed on the slider. The molded lines on the outer wall of the rotating tube can form a stable pattern on the paper feed belt, thereby improving the friction of the side wall of the paper feed belt; the heating element is arranged inside the rotating tube to ensure that the rotating tube maintains the required temperature during operation and ensures the quality of pattern forming; the second motor drives the driving gear to rotate, and the rotating tube is driven to rotate through the meshing transmission of the driving gear and the driven gear, thereby realizing efficient and uniform knurling processing, thereby ensuring the consistency and stability of the knurling of the paper feed belt.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. The paper conveyor belt in this application has been knurled to give it a roughened sidewall, which increases the friction when in contact with the paper and effectively improves the stability of the paper during transportation.

[0027] 2. The present application provides a tension adjustment mechanism that can adjust the tension of the paper feed belt to ensure uniform force during the knurling process and avoid transportation deviation caused by uneven tension;

[0028] 3. The hot pressing roller assembly in the knurling mechanism of the present application can form a stable pattern on the paper feed belt, further enhancing the friction performance of the side wall and improving the working stability of the paper feed belt. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0031] Figure 2 It is a rear view schematic diagram of the overall structure of an embodiment of the present application.

[0032] Reference numerals:

[0033] 1. Bracket; 101. Slide;

[0034] 2. Fixing mechanism; 21. Driving wheel; 211. First motor; 22. Driven wheel; 23. Anti-slip pattern;

[0035] 3. Tension adjustment mechanism; 31. First telescopic member; 32. Movable bracket; 33. Pressure wheel; 34. Pressure sensor; 35. Reversing wheel;

[0036] 4. Knurling mechanism;

[0037] 41. Hot pressing roller assembly; 411. Rotating tube; 412. Molding pattern; 413. Heating element;

[0038] 414, second motor; 415, driving gear; 416, driven gear;

[0039] 42. Telescopic assembly; 421. Slider; 422. Second telescopic member;

[0040] 5. Paper feed belt. DETAILED DESCRIPTION

[0041] The following is combined with Figure 1-2 This application is described in further detail.

[0042] The embodiment of the present application discloses a knurling device for a paper conveyor belt.

[0043] Reference Figure 1 and Figure 2 A knurling device for a paper feed belt 5 includes a bracket 1, a fixing mechanism 2, a tension adjustment mechanism 3 and a knurling mechanism 4. The fixing mechanism 2 is mounted on the bracket 1 and is used to fix the paper feed belt 5. The tension adjustment mechanism 3 is mounted on the bracket 1 and is used to adjust the tension of the paper feed belt 5. The knurling mechanism 4 is mounted on the bracket 1 and is used to emboss a pattern on the paper feed belt 5. The fixing mechanism 2 includes a driving wheel 21 and a plurality of driven wheels 22. The driving wheel 21 and the plurality of driven wheels 22 are coplanar and can be rotatably mounted on the bracket 1. The driving wheel 21 and the plurality of driven wheels 22 are spaced apart, and the axis of the driving wheel 21 and the axes of the plurality of driven wheels 22 are parallel to each other.

[0044] Reference Figure 1 and Figure 2 In the embodiment of the present application, the ground paper conveyor belt 5 is fixed to the fixing mechanism 2. After the annular paper conveyor belt 5 is put on the driving wheel 21 and the multiple driven wheels 22, the tension adjustment mechanism 3 is used to adjust the tension of the paper conveyor belt 5 so that the paper conveyor belt 5 is well tensioned between the driving wheel 21 and the multiple driven wheels 22, and there is effective friction between the paper conveyor belt 5 and the driving wheel 21 and the multiple driven wheels 22, so that the driving wheel 21 and the multiple driven wheels 22 can effectively support the paper conveyor belt 5 and ensure its smooth transmission. The knurling device of the paper conveyor belt 5 can effectively emboss a pattern on the paper conveyor belt 5, increase the friction between the paper conveyor belt 5 and the paper, thereby ensuring the stability of the paper during transportation. The fixing mechanism 2 is installed through the bracket 1 and is used to fix the paper conveyor belt 5 to ensure the stable position of the paper conveyor belt 5 during the processing process. The tension adjustment mechanism 3 is used to adjust the tension of the paper conveyor belt 5 to ensure uniform pressure during the knurling process and improve the knurling quality. The knurling mechanism 4 can emboss patterns on the paper conveying belt 5 to enhance friction and improve paper transportation effect.

[0045] Reference Figure 1 and Figure 2 The sidewalls of the driving wheel 21 and the multiple driven wheels 22 are all provided with anti-skid patterns 23. The anti-skid patterns 23 increase the friction between the paper feed belt 5 and the driving wheel 21 and the driven wheels 22, thereby improving the stability of the paper feed belt 5 in the equipment, ensuring that the paper feed belt 5 is not prone to slipping during the knurling process, and effectively improving the knurling quality.

[0046] Reference Figure 1 and Figure 2 The tension adjustment mechanism 3 includes a pressure wheel 33 and two reversing wheels 35. The axes of the pressure wheel 33 and the reversing wheels 35 are parallel to the axis of the driving wheel 21. The pressure wheel 33 and the reversing wheels 35 are both arranged on the side of the fixing mechanism 2 and are coplanar with the driving wheel 21. The pressure wheel 33 is arranged between the two reversing wheels 35 and can move toward the fixing mechanism 2. After the paper feed belt 5 is wound around the driving wheel 21 and the multiple driven wheels 22, the paper feed belt 5 passes between the pressure wheel 33 and the two reversing wheels 35. The pressure wheel 33 moves toward the fixing mechanism 2, pressing the paper feed belt 5 against the fixing mechanism 2, thereby adjusting the tension of the paper feed belt 5 and ensuring that the paper feed belt 5 maintains appropriate tension during the knurling process, thereby improving the knurling quality and efficiency.

[0047] Reference Figure 1 and Figure 2 The tension adjustment mechanism 3 further includes a first telescopic member 31, a first end of which is connected to the bracket 1, and a second end of which is connected to a pressure wheel 33. The first telescopic member 31 can drive the pressure wheel 33 toward the fixing mechanism 2, thereby adjusting the tension of the paper feed belt 5, ensuring that the paper feed belt 5 remains stable during the knurling process and improving the knurling quality.

[0048] Reference Figure 1 and Figure 2 The tension adjustment mechanism 3 also includes a movable bracket 32, and a pressure sensor 34 is connected between the movable bracket 32 ​​and the second end of the first telescopic member 31. A pressure wheel 33 is rotatably mounted on the end of the movable bracket 32 ​​away from the pressure sensor 34. A pressure sensor 34 is connected between the movable bracket 32 ​​and the second end of the first telescopic member 31, which can monitor and adjust the pressure of the pressure wheel 33 on the paper feed belt 5 in real time, ensuring uniform tension of the paper feed belt 5 on the fixing mechanism 2 and improving knurling quality. The pressure wheel 33 is rotatably mounted on the end of the movable bracket 32 ​​away from the pressure sensor 34, so that the pressure wheel 33 can reduce friction between the pressure wheel 33 and the paper feed belt 5 while applying pressure to the paper feed belt 5, thereby extending the service life of the pressure wheel 33.

[0049] Reference Figure 1 and Figure 2The knurling mechanism 4 includes a hot-pressing roller assembly 41 and a telescopic assembly 42, and the first end of the telescopic assembly 42 is mounted on the bracket 1. The hot-pressing roller assembly 41 is connected to the second end of the telescopic assembly 42, and the telescopic assembly 42 is used to drive the hot-pressing roller assembly 41 to move toward the driving wheel 21. The hot-pressing roller assembly 41 is used to emboss a pattern on the paper feed belt 5 at the driving wheel 21. The hot-pressing roller assembly 41 in the knurling mechanism 4 is capable of embossing a pattern on the paper feed belt 5 at the driving wheel 21, thereby increasing the friction force on the side wall of the paper feed belt 5. The telescopic assembly 42 drives the hot-pressing roller assembly 41 to move toward the driving wheel 21, thereby achieving effective knurling of the paper feed belt 5 and ensuring the uniformity and stability of the pattern.

[0050] Reference Figure 1 and Figure 2 , the bracket 1 shown is provided with a slide 101, and the telescopic assembly 42 includes a slider 421 and a second telescopic member 422. The slider 421 is provided in the slide 101 and is slidably connected to the bracket 1 through the slide 101. The second telescopic member 422 is arranged along the length direction of the slide 101, and one end is connected to the slider 421, and the other end is connected to the bracket 1. The hot pressing roller assembly 41 is installed on the slider 421. The slide 101, the slider 421 and the second telescopic member 422 are provided so that the hot pressing roller assembly 41 can move smoothly along the slide 101, ensuring that the position of the hot pressing roller assembly 41 is stable during the process of extruding the pattern on the paper feed belt 5, thereby improving the knurling accuracy and consistency. The provision of the second telescopic member 422 facilitates the adjustment of the position of the hot pressing roller assembly 41, thereby adapting to paper feed belts 5 of different thicknesses and improving the applicability of the device.

[0051] Reference Figure 1 and Figure 2 The hot pressing roller assembly 41 includes a rotating tube 411, a heating element 413, a second motor 414, a driving gear 415, and a driven gear 416. The axis of the rotating tube 411 is parallel to the axis of the driving wheel 21. The rotating tube 411 is rotatably mounted on a slider 421. The outer wall of the rotating tube 411 is provided with a molded pattern 412. One end of the heating element 413 is disposed within the rotating tube 411, and the other end is connected to the slider 421. The second motor 414 is mounted on the slider 421, and the driving gear 415 is connected to the second motor 414. The driven gear 416 is coaxially mounted on the rotating tube 411 and meshes with the driving gear 415.

[0052] Reference Figure 1 and Figure 2In the embodiment of the present application, the axis of the rotating tube 411 is parallel to the axis of the driving wheel 21 and is rotatably mounted on the slider 421. The molded pattern 412 on the outer wall of the rotating tube 411 can form a stable pattern on the paper conveyor belt 5, thereby improving the friction of the side wall of the paper conveyor belt 5. The heating element 413 is disposed within the rotating tube 411 to ensure that the rotating tube 411 maintains the required temperature during operation, thereby ensuring the quality of the pattern formation. The second motor 414 drives the driving gear 415 to rotate. Through the meshing transmission of the driving gear 415 and the driven gear 416, the rotating tube 411 is driven to rotate, achieving efficient and uniform knurling processing, thereby ensuring the consistency and stability of the knurling of the paper conveyor belt 5.

[0053] The implementation principle of the knurling device of the paper conveyor belt 5 in the embodiment of the present application is as follows:

[0054] The ground paper conveyor belt 5 is secured to the fixing mechanism 2. After the annular paper conveyor belt 5 is placed over the driving pulley 21 and the plurality of driven pulleys 22, the tension adjustment mechanism 3 is used to adjust the tension of the paper conveyor belt 5, ensuring that the paper conveyor belt 5 is well tensioned between the driving pulley 21 and the plurality of driven pulleys 22. This creates effective friction between the paper conveyor belt 5 and the driving pulley 21 and the plurality of driven pulleys 22, enabling the driving pulley 21 and the plurality of driven pulleys 22 to effectively support the paper conveyor belt 5 and ensure its smooth transport. The knurling device on the paper conveyor belt 5 effectively embosses a pattern on the paper conveyor belt 5, increasing the friction between the paper conveyor belt 5 and the paper, thereby ensuring the stability of the paper during transportation. The fixing mechanism 2 is mounted via the bracket 1 and is used to secure the paper conveyor belt 5, ensuring the stable position of the paper conveyor belt 5 during processing.

[0055] The first telescopic member 31 can drive the pressing wheel 33 to move toward the fixing mechanism 2, thereby adjusting the tension of the paper conveyor belt 5, ensuring that the paper conveyor belt 5 remains stable during the knurling process, and improving the knurling quality.

[0056] After the tension of the paper conveyor belt 5 is adjusted, the hot pressing roller assembly 41 moves toward the driving wheel 21, so that the rotating tube 411 presses the paper conveyor belt 5 onto the driving wheel 21, and then the driving wheel 21 rotates, thereby driving the paper conveyor belt 5 to rotate.

[0057] As the rotating tube 411 rotates, the profiled lines 412 on the outer wall of the rotating tube 411 form a stable pattern on the paper feed belt 5, increasing the friction of the sidewall of the paper feed belt 5. A heating element 413 is disposed within the rotating tube 411 to ensure that the rotating tube 411 maintains the desired temperature during operation, thereby ensuring the quality of the pattern.

[0058] Unless otherwise defined, the technical or scientific terms used in this application shall have the usual meanings understood by persons of ordinary skill in the field to which this application belongs. The words "first", "second", "third" and similar terms used in the specification and claims of this application do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "one" or "a" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before "include" or "comprises" cover the elements or objects listed after "include" or "comprises" and their equivalents, and do not exclude other elements or objects. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0059] The above are all optional embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A knurling device for a paper conveyor belt (5), characterized in that: It comprises a bracket (1), a fixing mechanism (2), a tension adjustment mechanism (3) and a knurling mechanism (4), wherein the fixing mechanism (2) is mounted on the bracket (1) and is used to fix the paper feed belt (5); The tension adjustment mechanism (3) is mounted on the bracket (1) and is used to adjust the tension of the paper feeding belt (5); The knurling mechanism (4) is mounted on the bracket (1) and is used to emboss patterns on the paper conveyor belt (5).

2. A knurling device for a paper conveyor belt (5) according to claim 1, characterized in that: The fixing mechanism (2) comprises a driving wheel (21) and a plurality of driven wheels (22), wherein the driving wheel (21) and the plurality of driven wheels (22) are coplanar and are rotatably mounted on the bracket (1); The driving wheel (21) and the plurality of driven wheels (22) are spaced apart, and the axis of the driving wheel (21) and the axes of the plurality of driven wheels (22) are parallel to each other.

3. A knurling device for a paper conveyor belt (5) according to claim 2, characterized in that: The side walls of the driving wheel (21) and the plurality of driven wheels (22) are all provided with anti-slip patterns (23).

4. A knurling device for a paper conveyor belt (5) according to claim 2, characterized in that: The tension adjustment mechanism (3) comprises a pressure wheel (33) and two reversing wheels (35), wherein the axis of the pressure wheel (33) and the axis of the reversing wheels (35) are both parallel to the axis of the driving wheel (21); The pressure wheel (33) and the reversing wheel (35) are both arranged on the side of the fixing mechanism (2) and are coplanar with the driving wheel (21); The pressure wheel (33) is arranged between the two reversing wheels (35) and is capable of moving toward the fixing mechanism (2).

5. A knurling device for a paper conveyor belt (5) according to claim 4, characterized in that: The tension adjustment mechanism (3) further comprises a first telescopic member (31), wherein a first end of the first telescopic member (31) is connected to the bracket (1), and a second end of the first telescopic member (31) is connected to the pressure wheel (33).

6. A knurling device for a paper conveyor belt (5) according to claim 5, characterized in that: The tension adjustment mechanism (3) further includes a movable bracket (32), and a pressure sensor (34) is connected between the movable bracket (32) and the second end of the first telescopic member (31); The pressure wheel (33) is rotatably mounted on an end of the movable bracket (32) away from the pressure sensor (34).

7. A knurling device for a paper conveyor belt (5) according to claim 2, characterized in that: The knurling mechanism (4) comprises a hot pressing roller assembly (41) and a telescopic assembly (42), wherein a first end of the telescopic assembly (42) is mounted on the bracket (1); The hot pressing roller assembly (41) is connected to the second end of the telescopic assembly (42), and the telescopic assembly (42) is used to drive the hot pressing roller assembly (41) to move toward the driving wheel (21); The hot pressing roller assembly (41) is used to press a pattern on the paper conveying belt (5) at the driving wheel (21).

8. A knurling device for a paper conveyor belt (5) according to claim 7, characterized in that: The bracket (1) is provided with a slide groove (101), the telescopic assembly (42) includes a slider (421) and a second telescopic member (422), the slider (421) is provided in the slide groove (101), and is slidably connected to the bracket (1) via the slide groove (101); The second telescopic member (422) is arranged along the length direction of the slide groove (101), and one end is connected to the slider (421), and the other end is connected to the bracket (1); The hot pressing roller assembly (41) is mounted on the slider (421).

9. A knurling device for a paper conveyor belt (5) according to claim 8, characterized in that: The hot pressing roller assembly (41) comprises a rotating tube (411), a heating element (413), a second motor (414), a driving gear (415) and a driven gear (416); the axis of the rotating tube (411) is parallel to the axis of the driving wheel (21); the rotating tube (411) is rotatably mounted on the slider (421); and the outer wall of the rotating tube (411) is provided with a molding pattern (412); One end of the heating element (413) is disposed in the rotating tube (411), and the other end is connected to the slider (421); The second motor (414) is mounted on the slider (421), and the driving gear (415) is connected to the second motor (414); The driven gear (416) is coaxially mounted on the rotating tube (411) and meshes with the driving gear (415).

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