Adjusting type paper feeding mechanism of carton printing machine

Abstract

The utility model provides an adjusting type paper feeding mechanism of a carton printing machine, which comprises an equipment platform, mounting boxes, paper feeding roll shafts, an adjusting structure, a feeding plate and a limiting structure, the side surface of one end of the equipment platform is fixedly connected with two groups of mounting boxes, and the two groups of paper feeding roll shafts are arranged between the two groups of mounting boxes; the outer surfaces of the two sets of paper feeding roller shafts are sleeved with two sets of paper feeding rollers correspondingly, through grooves are formed in the outer surfaces of the two sets of paper feeding roller shafts correspondingly, two sets of adjusting structures are arranged in the through grooves in the outer surfaces of the two sets of paper feeding roller shafts correspondingly, a feeding plate is fixedly connected to the upper surface of the equipment platform, and two sets of limiting structures are arranged on the upper surface of the feeding plate. Through the arrangement of the limiting structures, the air guide plates, the dust suction ports and the dust suction pipes, the distance between the two limiting plates is controlled by controlling the shrinkage and the ejection amount of the ejection end of the electric cylinder, dust suction and cleaning are conducted on the printed surface of a paperboard, the situation that the dust suction ports adsorb the paperboard is prevented, and chippings and dust on the outer surface of the paperboard are effectively reduced; and the qualified rate of products is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of paper feeding equipment for printing presses, in particular to a mediating paper feeding mechanism for a carton printing press. Background Art

[0002] A mediating carton printing press is a type of equipment specifically used for printing cartons, and is usually used to produce and customize cartons of various types and specifications. These presses have specific designs and functions to suit the needs and characteristics of carton printing. Mediating carton printing presses are specially designed for printing on the surface of cartons. Cartons are usually used to package and transport goods, so printing quality and durability are key considerations. These presses can use different printing technologies, such as flexographic printing, gravure printing, or lantern screen printing, to meet different printing needs and effect requirements. The key feature of a mediating printing press is its mediating system, which can adapt to cartons of different sizes and shapes for printing. These systems usually include adjustable paper feed devices and transmission systems to ensure the stability and alignment accuracy of cartons during the printing process. These presses are widely used in various industries such as food packaging, electronic product packaging, and pharmaceutical packaging, and can meet the customized printing needs of different customers. The paper feeding mechanism of the printing press is one of its key components, which is responsible for feeding printing materials (such as paper, film, etc.) from the paper feed end into the printing area to ensure the smooth progress of the printing process;

[0003] In order to allow the cardboard to enter the printing machine, the paper feeding mechanism of the printing machine is usually composed of a paper feeding roller and a paper feeding wheel. In order to adapt to different carton sizes, the spacing between the paper feeding rollers on the outer surface of the paper feeding roller needs to be adjusted. The paper feeding roller is fixed to the outer surface of the paper feeding roller with bolts. The workers need to use tools to remove the bolts to adjust the paper feeding roller, which is inconvenient to adjust. At the same time, since the cardboard is inevitably generated during the cutting process during the production process, the debris and dust are attached to the outer surface of the cardboard. After printing is completed, the debris and dust on the outer surface of the cardboard fall off, which will cause the loss of printing ink and reduce the qualified rate of the product. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a mediating paper feeding mechanism for a carton printing machine.

[0005] The utility model provides a paper feeding mechanism of a mediation type carton printing machine, comprising: an equipment platform, an installation box, a paper feeding roller, an adjustment structure, a feeding plate and a limiting structure, wherein the side surface of one end of the equipment platform is fixedly connected with two groups of installation boxes, two groups of paper feeding rollers are arranged between the two groups of installation boxes, the outer surfaces of the two groups of paper feeding rollers are respectively sleeved with two groups of paper feeding rollers, the outer surfaces of the two groups of paper feeding rollers are respectively provided with through grooves, and a group of adjustment structures are respectively arranged inside the through grooves on the outer surfaces of the two groups of paper feeding rollers, the adjustment structure comprises an adjustment plate, positive and negative threaded screws and a first servo motor, two groups of adjustment plates are arranged, the side surfaces of the two groups of adjustment plates are provided with threaded holes, the threaded holes on the side surfaces of the two groups of adjustment plates are threadedly connected with positive and negative threaded screws, the upper surface of the equipment platform is fixedly connected with a feeding plate, the upper surface of the feeding plate is provided with two groups of limiting structures, the limiting structure comprises an electric cylinder and a limiting plate, the bottom of the electric cylinder is fixedly connected to the upper surface of the feeding plate, and the top outlet end of the electric cylinder is fixedly connected to the limiting plate.

[0006] Preferably, four groups of support columns are fixedly connected to the lower surface of the equipment platform, a mounting frame is fixedly connected to the upper surface of one end of the equipment platform close to the two groups of mounting boxes, a mounting rod is fixedly connected to the side surface of the mounting frame, an air guide plate is fixedly connected to the lower end of the mounting rod, three groups of dust suction ports are fixedly connected to the lower surface of the air guide plate, the dust suction ports are connected to the inside of the air guide plate, a dust suction pipe is fixedly connected to the upper surface of one end of the air guide plate, and the dust suction pipe and the air guide plate are connected to each other.

[0007] Preferably, two groups of through holes are respectively opened on opposite sides of the two groups of installation boxes, and the through holes are connected to the inside of the installation boxes.

[0008] Preferably, both ends of the two groups of paper feed rollers respectively pass through two groups of through holes on opposite sides of the two groups of installation boxes and extend to the inside of the installation boxes, one end of the two groups of paper feed rollers is respectively provided with a second servo motor, one side of the two groups of second servo motors is fixedly connected to the inner wall of one group of installation boxes, the power output ends of the two groups of second servo motors are respectively fixedly connected to one end of the two groups of paper feed rollers, a cavity is opened inside one end of the two groups of paper feed rollers, a through hole is opened on the inner wall of the cavity, the through holes on the inner wall of the cavity at one end of the two groups of paper feed rollers are connected to each other with the through grooves on the outer surfaces of the two groups of paper feed rollers, and the first servo motors in the two adjustment structures are respectively arranged inside the inner cavity at one end of the two groups of paper feed rollers.

[0009] Preferably, the side surfaces of the two groups of paper feeding rollers are provided with through holes, and the two groups of through holes on the side surfaces of the paper feeding rollers are slidably connected to the outer surface of one group of paper feeding roller shafts.

[0010] Preferably, the two ends of the two groups of adjustment plates pass through the through grooves on the outer surface of the paper feed roller shaft and are respectively fixedly connected to the inner walls of the through holes on the side surfaces of the two groups of paper feed rollers, and the threaded holes on the side surfaces of the two groups of adjustment plates are respectively located at the positive and negative threads of the positive and negative threaded screws.

[0011] Preferably, one end of the forward and reverse screw rods is rotatably connected to the inner wall of the through groove on the outer surface of the paper feed roller shaft, and the other end of the forward and reverse screw rods passes through the through hole on the inner wall of the internal cavity of one end of the paper feed roller shaft and extends to the interior of the internal cavity of one end of the paper feed roller shaft. The forward and reverse screw rods extend to one end of the internal cavity of the paper feed roller shaft and are fixedly connected to the power output end of the first servo motor, and one side of the first servo motor is fixedly connected to the inner wall of the internal cavity of one end of the paper feed roller shaft.

[0012] Preferably, the limit plate is slidably connected to the upper surface of the feeding plate, and a cardboard is arranged below the limit plate, one end of the cardboard extends between the paper feeding rollers on the outer surfaces of the two sets of paper feeding rollers, and the cardboard is located below the dust suction port.

[0013] Compared with the related art, the paper feeding mechanism of the mediating carton printing machine provided by the utility model has the following beneficial effects:

[0014] By providing an adjustment structure, the first servo motor is started, and the rotation of the power output end of the first servo motor drives the forward and reverse screws to rotate. When the forward and reverse screws rotate, the forward and reverse teeth on the outer surfaces of the forward and reverse screws are respectively threadedly connected to the threaded holes on the side surfaces of the two groups of adjustment plates, so that the two groups of adjustment plates slide along the through grooves on the outer surface of the paper feeding roller shaft. Since the threaded holes on the side surfaces of the two groups of adjustment plates are respectively located at the forward teeth and reverse teeth on the outer surfaces of the forward and reverse screws, when the forward and reverse screws rotate forward, the two groups of adjustment plates approach each other, and when the forward and reverse screws rotate backward, the two groups of adjustment plates move away from each other. The forward and reverse rotation of the forward and reverse screws is controlled by controlling the forward and reverse rotation of the first servo motor, and the paper feeding roller on the outer surface of the paper feeding roller shaft will follow the two groups of adjustment plates to move closer to or away from each other to adapt to cardboards of different sizes, effectively improving the convenience of adjusting the paper feeding roller.

[0015] By setting a limit structure, an air guide plate, a dust suction port and a dust suction pipe, the contraction and ejection amount of the electric cylinder ejection end are controlled to control the distance between the two sets of limit plates. The dust suction pipe is connected to the dust suction pump, and the dust suction pump is started. The dust suction pump generates suction through the dust suction pipe, the air guide pipe and the dust suction port to vacuum and clean the printed surface of the cardboard. The cardboard enters under the limit plate to prevent the dust suction port from adsorbing the cardboard, effectively reducing the debris and dust on the outer surface of the cardboard and effectively improving the qualified rate of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A structural schematic diagram of a preferred embodiment of the paper feeding mechanism of the mediation type carton printing machine provided by the utility model;

[0017] Figure 2 It is a structural schematic diagram of another viewing angle of the utility model;

[0018] Figure 3 It is a schematic diagram of the exploded structure of the internal structure of the installation box and the paper feeding roller of the utility model;

[0019] Figure 4 It is a schematic diagram of the exploded structure of the paper feeding roller shaft, paper feeding wheel and adjusting structure of the utility model.

[0020] Numbers in the figure: 1. Equipment platform; 2. Installation box; 3. Paper feed roller; 4. Paper feed roller; 5. Adjustment structure; 6. Adjustment plate; 7. Positive and negative screw rods; 8. First servo motor; 9. Feed plate; 10. Limit structure; 11. Electric cylinder; 12. Limit plate; 13. Support column; 14. Mounting frame; 15. Mounting rod; 16. Air guide plate; 17. Dust suction port; 18. Dust suction pipe; 19. Second servo motor; 20. Cardboard. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and implementation modes.

[0022] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 ,in, Figure 1 A structural schematic diagram of a preferred embodiment of the paper feeding mechanism of the mediation type carton printing machine provided by the utility model; Figure 2 It is a structural schematic diagram of another viewing angle of the utility model; Figure 3 It is a schematic diagram of the exploded structure of the internal structure of the installation box and the paper feeding roller of the utility model; Figure 4 The utility model is a schematic diagram of the exploded structure of the paper feed roller, paper feed roller and adjustment structure. It includes: an equipment platform 1, an installation box 2, a paper feed roller 3, an adjustment structure 5, a feeding plate 9 and a limiting structure 10. The side surface of one end of the equipment platform 1 is fixedly connected to two groups of installation boxes 2. Two groups of paper feed rollers 3 are arranged between the two groups of installation boxes 2. The outer surfaces of the two groups of paper feed rollers 3 are respectively sleeved with two groups of paper feed rollers 4. The outer surfaces of the two groups of paper feed rollers 3 are respectively provided with through grooves. The inner parts of the through grooves on the outer surfaces of the two groups of paper feed rollers 3 are respectively provided with a group of adjustment structures 5. The adjustment structure 5 includes an adjustment plate 6, positive and negative threaded screws 7 and a first servo motor 8. Two groups of adjustment plates 6 are provided. The adjustment structure 5 is convenient for adjusting the spacing of the paper feed rollers 4. The two groups of adjustment A threaded hole is provided on the side surface of the plate 6, and the two groups of threaded holes on the side surfaces of the adjusting plates 6 are internally threadedly connected with positive and negative threaded screws 7. A feeding plate 9 is fixedly connected to the upper surface of the equipment platform 1. The feeding plate 9 is convenient for continuous feeding of the printing press. Two groups of limiting structures 10 are arranged on the upper surface of the feeding plate 9. The limiting structure 10 is convenient for limiting the position of the cardboard 20. The limiting structure 10 includes an electric cylinder 11 and a limiting plate 12. The bottom of the electric cylinder 11 is fixedly connected to the upper surface of the feeding plate 9, and the ejection end of the electric cylinder 11 is fixedly connected to the limiting plate 12. The electric cylinder 11 is started, and the spacing between the two groups of limiting plates 12 is controlled by controlling the contraction and ejection amount of the ejection end of the electric cylinder 11.

[0023] In the specific implementation process, Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, four groups of support columns 13 are fixedly connected to the lower surface of the equipment platform 1, and the support columns 13 provide a stable supporting force for the equipment platform 1. A mounting frame 14 is fixedly connected to the upper surface of one end of the equipment platform 1 close to the two groups of mounting boxes 2, and a mounting rod 15 is fixedly connected to the side surface of the mounting frame 14. The mounting frame 14 is convenient for installing the mounting rod 15. An air guide plate 16 is fixedly connected to the lower end of the mounting rod 15. The mounting rod 15 is convenient for installing the air guide plate 16. Three groups of dust suction ports 17 are fixedly connected to the lower surface of the air guide plate 16. The dust suction ports 17 are interconnected with the inside of the air guide plate 16. A dust suction pipe 18 is fixedly connected to the upper surface of one end of the air guide plate 16. The dust suction pipe 18 and the air guide plate 16 are interconnected. The dust suction pipe 18 is connected to a dust suction pump, and the dust suction pump is started. The dust suction pump generates suction through the dust suction pipe 18, the air guide pipe and the dust suction port 17 to vacuum and clean the printed surface of the cardboard 20.

[0024] Two groups of through holes are respectively opened on opposite sides of the two groups of installation boxes 2, and the through holes are interconnected with the inside of the installation boxes 2, so that the installation boxes 2 are convenient for installing the paper feeding roller shaft 3.

[0025] Among them, the two ends of the two sets of paper feeding roller shafts 3 respectively pass through the two sets of through holes on the opposite sides of the two sets of installation boxes 2 and extend to the inside of the installation box 2. The two ends of the paper feeding roller shafts 3 can rotate inside the through holes on the opposite sides of the two sets of installation boxes 2. One end of the two sets of paper feeding roller shafts 3 is respectively provided with a second servo motor 19, and the second servo motor 19 is electrically connected to an external power supply. One side of the two sets of second servo motors 19 is fixedly connected to the inner wall of one set of installation boxes 2. The power output ends of the two sets of second servo motors 19 are respectively fixedly connected to one end of the two sets of paper feeding roller shafts 3. The second servo motor 19 is started. The rotation of the power output end of the second servo motor 19 drives the paper feed roller 3 to rotate, and controls the relative rotation of the power output ends of the two groups of second servo motors 19, thereby causing the two groups of paper feed rollers 3 to rotate relative to each other. A cavity is opened inside one end of the two groups of paper feed rollers 3, and a through hole is opened on the inner wall of the cavity. The through hole on the inner wall of the cavity at one end of the two groups of paper feed rollers 3 is connected to the through groove on the outer surface of the two groups of paper feed rollers 3. The first servo motors 8 in the two groups of adjustment structures 5 are respectively arranged inside the internal cavity at one end of the two groups of paper feed rollers 3, and the first servo motors 8 are electrically connected to an external power supply.

[0026] The side surfaces of the two groups of paper feeding rollers 4 are provided with through holes, which are slidably connected to the outer surface of a group of paper feeding roller shafts 3 , and the paper feeding rollers 4 can slide on the outer surface of the paper feeding roller shafts 3 .

[0027] Among them, the two ends of the two groups of adjustment plates 6 pass through the through grooves on the outer surface of the paper feed roller shaft 3 and are respectively fixedly connected to the inner walls of the through holes on the side surfaces of the two groups of paper feed rollers 4. The paper feed rollers 4 on the outer surface of the paper feed roller shaft 3 will follow the two groups of adjustment plates 6 to approach or move away from each other. The threaded holes on the side surfaces of the two groups of adjustment plates 6 are respectively located at the positive and negative teeth of the positive and negative threads of the positive and negative threads of the screw rods 7. Since the threaded holes on the side surfaces of the two groups of adjustment plates 6 are respectively located at the positive and negative teeth of the outer surfaces of the positive and negative threads of the screw rods 7, when the positive and negative threads of the screw rods 7 rotate forward, the two groups of adjustment plates 6 approach each other, and when the positive and negative threads of the screw rods 7 rotate backward, the two groups of adjustment plates 6 move away from each other.

[0028] Among them, one end of the forward and reverse screw rod 7 is rotatably connected to the inner wall of the through groove on the outer surface of the paper feed roller 3, and the other end of the forward and reverse screw rod 7 passes through the through hole on the inner wall of the internal cavity of one end of the paper feed roller 3 and extends to the inside of the internal cavity of one end of the paper feed roller 3. The forward and reverse screw rod 7 can rotate inside the through hole on the inner wall of the internal cavity of one end of the paper feed roller 3. The forward and reverse screw rod 7 extends to one end of the internal cavity of the paper feed roller 3 and is fixedly connected to the power output end of the first servo motor 8. One side of the first servo motor 8 is fixedly connected to the inner wall of the internal cavity of one end of the paper feed roller 3. The first servo motor 8 is started, and the rotation of the power output end of the first servo motor 8 drives the forward and reverse screw rod 7 to rotate.

[0029] Among them, the limiting plate 12 is slidably connected to the upper surface of the feeding plate 9, and a cardboard 20 is arranged under the limiting plate 12. The limiting plates 12 in the two sets of limiting structures 10 are provided with limiting grooves on opposite sides, so that the cardboard 20 can enter under the limiting plate 12, and one end of the cardboard 20 extends to between the paper feeding rollers 4 on the outer surfaces of the two sets of paper feeding rollers 3. The paper feeding rollers 4 are attached to the outer surface of the cardboard 20. Under the action of friction, the cardboard 20 is driven to enter under the dust suction port 17. The cardboard 20 is located under the dust suction port 17, and the dust suction port 17 generates suction to clean the printed surface of the cardboard 20.

[0030] The working principle of the utility model is as follows: the operator first adjusts the distance between the two groups of paper feeding rollers 4 on the outer surface of the paper feeding roller shaft 3 according to the size of the paper board 20 to be printed, and the operator starts the first servo motor 8. The power output end of the first servo motor 8 rotates to drive the positive and negative threaded rods 7 to rotate. When the positive and negative threaded rods 7 rotate, the positive and negative threads on the outer surfaces of the positive and negative threaded rods 7 are respectively threadedly connected with the threaded holes on the side surfaces of the two groups of adjustment plates 6, so that the two groups of adjustment plates 6 slide along the through grooves on the outer surface of the paper feeding roller shaft 3. The threaded holes on the side surfaces of the adjustment plates 6 are respectively located at the positive and negative teeth on the outer surfaces of the positive and negative screw rods 7. When the positive and negative screw rods 7 rotate forward, the two groups of adjustment plates 6 approach each other, and when the positive and negative screw rods 7 rotate backward, the two groups of adjustment plates 6 move away from each other. The positive and negative rotations of the positive and negative screw rods 7 are controlled by controlling the positive and negative rotations of the first servo motor 8, and the paper feeding roller 4 on the outer surface of the paper feeding roller shaft 3 will follow the two groups of adjustment plates 6 to move closer to or away from each other to adapt to cardboards 20 of different sizes, and at the same time adjust the spacing between the two groups of limit plates 12, and the operation The operator starts the electric cylinder 11, and controls the distance between the two sets of limit plates 12 by controlling the contraction and ejection amount of the ejection end of the electric cylinder 11. When the distance is adjusted to a suitable size, the operator inserts the cardboard 20 between the paper feeding rollers 4 on the outer surfaces of the two sets of paper feeding roller shafts 3. The operator starts the second servo motor 19, and the rotation of the power output end of the second servo motor 19 drives the paper feeding roller shaft 3 to rotate, and controls the power output ends of the two sets of second servo motors 19 to rotate relative to each other, thereby causing the two sets of paper feeding roller shafts 3 to rotate relative to each other, and through the paper feeding roller shafts 4 is attached to the outer surface of the paperboard 20, and under the action of friction, the paperboard 20 is driven to enter under the dust suction port 17, the dust suction pipe 18 is connected to the dust suction pump, and the dust suction pump is started. The dust suction pump generates suction through the dust suction pipe 18, the air duct and the dust suction port 17 to vacuum and clean the printed surface of the paperboard 20. The paperboard 20 enters under the limiting plate 12 to prevent the dust suction port 17 from adsorbing the paperboard 20. When the paper feeding roller 4 is attached to the outer surface of the paperboard 20, under the action of friction, the paperboard 20 is continuously driven to enter the interior of the printing press for printing.

[0031] The circuits and controls involved in the present invention are all prior art and will not be described in detail here.

[0032] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A paper feeding mechanism of a mediating carton printing press, comprising: An equipment platform (1), an installation box (2), a paper feed roller (3), an adjustment structure (5), a feeding plate (9) and a limiting structure (10), characterized in that two sets of installation boxes (2) are fixedly connected to the side surface of one end of the equipment platform (1), two sets of paper feed rollers (3) are arranged between the two sets of installation boxes (2), two sets of paper feed rollers (4) are respectively sleeved on the outer surfaces of the two sets of paper feed rollers (3), through grooves are respectively opened on the outer surfaces of the two sets of paper feed rollers (3), and a set of adjustment structures (5) are respectively arranged inside the through grooves on the outer surfaces of the two sets of paper feed rollers (3), and the adjustment structures (5) include an adjustment plate (6) , positive and negative threaded screws (7) and a first servo motor (8), two groups of adjustment plates (6) are provided, threaded holes are provided on the side surfaces of the two groups of adjustment plates (6), the positive and negative threaded screws (7) are threadedly connected inside the threaded holes on the side surfaces of the two groups of adjustment plates (6), a feeding plate (9) is fixedly connected to the upper surface of the equipment platform (1), two groups of limiting structures (10) are provided on the upper surface of the feeding plate (9), the limiting structure (10) comprises an electric cylinder (11) and a limiting plate (12), the bottom of the electric cylinder (11) is fixedly connected to the upper surface of the feeding plate (9), and the ejection end of the electric cylinder (11) is fixedly connected to the limiting plate (12).

2. The paper feeding mechanism of the mediation type carton printing press according to claim 1 is characterized in that: The lower surface of the equipment platform (1) is fixedly connected to four groups of support columns (13); the upper surface of one end of the equipment platform (1) close to the two groups of installation boxes (2) is fixedly connected to a mounting frame (14); the side surface of the mounting frame (14) is fixedly connected to a mounting rod (15); the lower end of the mounting rod (15) is fixedly connected to an air guide plate (16); the lower surface of the air guide plate (16) is fixedly connected to three groups of dust suction ports (17); the dust suction ports (17) are connected to the inside of the air guide plate (16); the upper surface of one end of the air guide plate (16) is fixedly connected to a dust suction pipe (18); the dust suction pipe (18) and the air guide plate (16) are connected to each other.

3. The paper feeding mechanism of the mediation type carton printing press according to claim 1 is characterized in that: Two groups of through holes are respectively opened on opposite sides of the two groups of installation boxes (2), and the through holes are connected to the interior of the installation boxes (2).

4. The paper feeding mechanism of the mediation type carton printing press according to claim 1 is characterized in that: The two ends of the two groups of paper feeding rollers (3) respectively pass through two groups of through holes on opposite sides of the two groups of installation boxes (2) and extend into the interior of the installation boxes (2). A second servo motor (19) is respectively arranged at one end of the two groups of paper feeding rollers (3). One side of the two groups of second servo motors (19) is fixedly connected to the inner wall of one group of installation boxes (2). The power output ends of the two groups of second servo motors (19) are respectively fixedly connected to one end of the two groups of paper feeding rollers (3). A cavity is provided inside one end of the two groups of paper feeding rollers (3). A through hole is provided on the inner wall of the cavity. The through hole on the inner wall of the cavity at one end of the two groups of paper feeding rollers (3) is connected to the through groove on the outer surface of the two groups of paper feeding rollers (3). The first servo motors (8) in the two groups of adjustment structures (5) are respectively arranged inside the inner cavity at one end of the two groups of paper feeding rollers (3).

5. The paper feeding mechanism of the mediation type carton printing press according to claim 1 is characterized in that: The side surfaces of the two groups of paper feeding rollers (4) are provided with through holes, and the through holes on the side surfaces of the two groups of paper feeding rollers (4) are slidably connected to the outer surface of a group of paper feeding roller shafts (3).

6. The paper feeding mechanism of the mediation type carton printing press according to claim 1 is characterized in that: The two ends of the two groups of adjustment plates (6) pass through the through grooves on the outer surface of the paper feeding roller shaft (3) and are respectively fixedly connected to the inner walls of the through holes on the side surfaces of the two groups of paper feeding rollers (4); the threaded holes on the side surfaces of the two groups of adjustment plates (6) are respectively located at the positive and negative threads of the positive and negative threaded screw rods (7).

7. The paper feeding mechanism of the mediation type carton printing press according to claim 1 is characterized in that: One end of the positive and negative threaded rod (7) is rotatably connected to the inner wall of the through groove on the outer surface of the paper feed roller (3), and the other end of the positive and negative threaded rod (7) passes through the through hole on the inner wall of the internal cavity of one end of the paper feed roller (3) and extends to the inside of the internal cavity of the one end of the paper feed roller (3). One end of the positive and negative threaded rod (7) extending to the inside of the internal cavity of the paper feed roller (3) is fixedly connected to the power output end of the first servo motor (8), and one side of the first servo motor (8) is fixedly connected to the inner wall of the internal cavity of one end of the paper feed roller (3).

8. The paper feeding mechanism of the mediation type carton printing press according to claim 1 is characterized in that: The limiting plate (12) is slidably connected to the upper surface of the feeding plate (9), and a paperboard (20) is arranged below the limiting plate (12). One end of the paperboard (20) extends between the paper feeding rollers (4) on the outer surfaces of the two sets of paper feeding roller shafts (3), and the paperboard (20) is located below the dust suction port (17).

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