A packaging printing conveying structure

Abstract

The application discloses a kind of packaging printing conveying structures, it is related to packaging printing equipment technical field.The pedestal is provided with conveying table plate, and multiple conveying rollers are arranged on conveying table plate in parallel and interval;Roller assembly is provided with two, and one roller assembly is movably arranged on the opposite side of conveying table plate;Multiple dust suction pipe assemblies are arranged in parallel and interval above conveying table plate;Roller assembly includes two symmetrical horizontal cylinders arranged on conveying table plate, and the piston rod of each horizontal cylinder is connected with one adjusting seat, and multiple rollers are arranged on the side wall of adjusting seat end close to conveying table plate in interval;Dust suction pipe assembly includes dust suction machine arranged outside pedestal, and one dust suction pipe is arranged between adjacent two rollers, and the outer peripheral wall of dust suction pipe is provided with multiple dust suction holes.The application has the advantages of improving the cleanliness of packaging carton printing surface before printing, preventing edge lifting during conveying and the like.

Description

Technical Field

[0001] This invention relates to the field of packaging and printing equipment technology, and more specifically to a packaging and printing conveying structure. Background Technology

[0002] In the packaging and printing industry, cardboard boxes (unfolded corrugated cardboard) need to be conveyed to the printing station via a conveyor structure before printing. After the cutting process, the surface of the cardboard boxes (unfolded corrugated cardboard) usually retains a large amount of paper scraps, dust, and other impurities generated during cutting. If these impurities cannot be effectively removed before printing, they will not only cause defects such as white spots and smearing, but may also fall into the movement gaps of the printing equipment, causing scratches on the printing rollers, affecting the service life of the equipment, and reducing the production yield. At the same time, the cardboard boxes (unfolded corrugated cardboard) themselves have a certain degree of elasticity, and the edges are prone to curling during conveying, affecting the printing quality. Summary of the Invention

[0003] To address the aforementioned technical shortcomings, the purpose of this invention is to provide a packaging printing conveying structure that has advantages such as improving the cleanliness of the printing surface of packaging cartons before printing and preventing edge curling during conveying.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: The present invention provides a packaging printing conveying structure, comprising: A platform, on which a conveyor plate is provided, and multiple conveyor rollers are arranged side by side at intervals on the conveyor plate; There are two pressure roller assemblies, one of which is movably mounted on each of the opposite sides of the conveyor plate. The vacuum tube assembly has multiple vacuum tube assemblies arranged parallel to each other at intervals above the conveyor plate. The pressure roller assembly includes two horizontal cylinders symmetrically arranged on the conveyor table. Each horizontal cylinder has an adjusting seat movably connected to its piston rod. Multiple pressure rollers are spaced apart on the side wall of the adjusting seat near the end of the conveyor table. The pressure rollers are distributed in parallel on the horizontal plane. The suction pipe assembly includes a vacuum cleaner installed outside the platform. A suction pipe connected to the vacuum cleaner is installed between each pair of adjacent pressure rollers. Multiple suction holes are provided on the outer peripheral wall of the suction pipe, and the suction holes face the conveyor platform.

[0005] Preferably, the conveying platform has multiple conveying roller grooves arranged side by side at intervals. Each conveying roller groove has a lifting cylinder on its bottom surface. The piston rod of the lifting cylinder has a conveying roller seat. Each conveying roller seat has multiple conveying rollers arranged along its length. This allows the lifting cylinder to be activated to drive the conveying roller seat to rise and fall as needed, thus allowing the selection of the number of conveying roller seats to be used.

[0006] Preferably, the bottom surface of the adjusting seat is slidably disposed on the top surface of the platform, and the conveying platform is located between the two adjusting seats. The distance between the two adjusting seats can be adjusted according to the size of the product conveyed on the conveying platform, thereby facilitating the limiting of the packaging carton during conveying.

[0007] Preferably, the pressure roller comprises: The rotating motor is embedded in the adjusting seat; The limiting plate is fixedly installed on the side wall of the adjusting seat, and the output shaft of the rotating motor moves through the limiting plate. The arc-shaped pressure plate is set on the side wall of the limiting plate away from the adjusting seat, and the arc-shaped opening of the arc-shaped pressure plate faces the top surface of the base. The conveyor plate is movably set inside the arc-shaped opening of the arc-shaped pressure plate and is coaxially connected to the output shaft of the rotating motor. When conveying the packaging carton, the conveyor plate and the limiting plate work together to limit the position of the packaging carton, which helps to improve the accuracy of the printing position during printing and prevents the packaging carton from tilting during the conveying process.

[0008] Preferably, both ends of the arc-shaped opening of the arc-shaped pressure plate are connected to semi-circular guide plates via a rotating shaft with a torsion spring. The arc-shaped top of the semi-circular guide plate faces the top surface of the platform, and the distance from the arc-shaped top of the semi-circular guide plate to the top surface of the conveying platform is the same as the distance from the conveying disc to the top surface of the conveying platform. Before the limiting disc contacts the packaging carton, it can first contact the packaging carton through the arc-shaped pressure plate, which helps to maintain the stability of the packaging carton during the conveying process.

[0009] Preferably, the vacuum tube comprises: The intermediate tube is set between two adjacent pressure rollers and is arranged parallel to each other above the platform. The dust suction hole is set on the outer peripheral wall of the intermediate tube. The regulating tube has a regulating tube movably fitted at both ends of the intermediate tube along its length. A connecting pipe and an adjusting pipe are coaxially arranged at the end away from the middle pipe. Both the connecting pipe and the adjusting pipe are connected to the vacuum cleaner. The tube hole is located on the side wall of the limiting plate. The end of the connecting tube away from the adjusting tube is movably inserted into the corresponding tube hole, which facilitates the adsorption of dust adhering to the packaging carton during transportation, thus improving printing quality.

[0010] Preferably, the cross-section of the pipe hole and the cross-section of the connecting pipe are both polygonal, and the shape and size of the pipe hole cross-section are the same as the shape and size of the connecting pipe cross-section, which helps to maintain the positional stability of the vacuum pipe.

[0011] Preferably, a pressure plate is movably sleeved on the outside of the connecting tube, and a return spring is provided between the pressure plate and the adjusting tube. The two ends of the return spring are respectively connected to the pressure plate and the adjusting tube. The pressure plate abuts against the side wall of the conveyor plate away from the adjusting seat end. According to different sizes of the packaging carton, the adjusting tube can be slidably adjusted at both ends of the length direction of the middle tube to better adapt to the size of the packaging carton.

[0012] Preferably, the conveying roller grooves are arranged in parallel at intervals along the length of the intermediate tube, and the length of the intermediate tube is greater than the distance between the two conveying roller grooves located at the outermost ends. According to different sizes of packaging cartons, the adjusting tube can be slidably adjusted at both ends of the length of the intermediate tube to better match the size of the packaging cartons. This facilitates the adsorption of dust adhering to the packaging cartons during transportation, which is beneficial to improving printing quality.

[0013] Preferably, the length of the intermediate tube is greater than twice the length of the adjusting tube, so that the adjusting tube can be slidably adjusted at both ends of the intermediate tube along the length direction according to different sizes of the packaging carton, so as to better adapt to the size of the packaging carton.

[0014] The beneficial effects of the present invention are as follows: 1. By setting the dust suction pipe assembly, the paper scraps and dust remaining on the packaging carton are sucked in through the dust suction hole under the action of the vacuum cleaner, thereby avoiding the paper scraps and dust from falling into the printing equipment during the later printing process and affecting the printing quality, while also improving the cleanliness of the printed surface of the packaging carton.

[0015] 2. The pressure roller assembly is designed to press and limit the opposite sides of packaging cartons of various sizes and widths during transport, thereby preventing the cartons from tilting during transport and improving the quality of subsequent printing.

[0016] 3. The adjustment tube can slide outside the middle tube, thereby adjusting the overall length of the suction tube. This ensures that the middle tube can always be adapted to packaging cartons of different widths, preventing insufficient suction range and improving applicability to packaging cartons of different widths. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of a packaging printing conveying structure provided in an embodiment of the present invention.

[0019] Figure 2 This is a schematic diagram of a packaging printing conveying structure without the dust suction pipe assembly, provided in an embodiment of the present invention.

[0020] Figure 3 This is a schematic diagram of the position of the conveyor roller groove in a packaging printing conveying structure provided in an embodiment of the present invention.

[0021] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A in the middle.

[0022] Figure 5 This is a schematic diagram showing the position of the lifting cylinder in a packaging printing conveying structure provided in an embodiment of the present invention.

[0023] Figure 6 This is a schematic diagram of the horizontal cylinder position in a packaging printing conveying structure provided in an embodiment of the present invention.

[0024] Figure 7 This is a schematic diagram of a dust suction pipe assembly for a packaging printing conveying structure provided in an embodiment of the present invention.

[0025] Figure 8 for Figure 7 Enlarged schematic diagram of the structure at point B.

[0026] Figure 9 This is a schematic diagram of a pressure roller structure for a packaging printing conveying structure provided in an embodiment of the present invention.

[0027] Figure 10 for Figure 9 Enlarged schematic diagram of the structure at point C.

[0028] Explanation of reference numerals in the attached drawings: 1. Platform; 11. Conveyor plate; 12. Conveyor roller; 13. Conveyor roller groove; 14. Lifting cylinder; 15. Conveyor roller seat; 2. Pressure roller assembly; 21. Horizontal cylinder; 22. Adjusting seat; 23. Pressure roller; 231. Rotary motor; 232. Limiting disc; 233. Arc-shaped pressure plate; 234. Conveyor plate; 235. Rotating shaft with torsion spring; 236. Semi-circular guide plate; 3. Dust suction pipe assembly; 31. Dust suction pipe; 311. Intermediate pipe; 312. Adjusting pipe; 313. Connecting pipe; 314. Pipe hole; 315. Pressure plate; 316. Return spring; 32. Dust suction hole. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] Example 1 like Figures 1 to 7 As shown, the present invention provides a packaging printing conveying structure, including a base 1, on which a conveying plate 11 is disposed, and multiple conveying rollers 12 are arranged side by side at intervals on the conveying plate 11; two pressure roller assemblies 2 are provided, one of which is movably disposed on each of the opposite sides of the conveying plate 11; multiple suction pipe assemblies 3 are arranged parallel to each other above the conveying plate 11; the pressure roller assembly 2 includes two horizontal cylinders 21 symmetrically disposed on the conveying plate 11, and an adjusting seat 22 is movably connected to the piston rod of each horizontal cylinder 21. Multiple pressure rollers 23 are arranged at intervals on the side wall of the adjusting seat 22 near the end of the conveying plate 11, and the pressure rollers 23 are arranged parallel to each other on the horizontal plane; the suction pipe assembly 3 includes a vacuum cleaner disposed outside the base 1, and a suction pipe 31 connected to the vacuum cleaner is disposed between each two adjacent pressure rollers 23. Multiple suction holes 32 are provided on the outer peripheral wall of the suction pipe 31, and the suction holes 32 face the conveying plate 11.

[0031] First, place the packaging carton (the packaging carton is in a flat state during printing, i.e., an unfolded corrugated cardboard) on the conveyor roller 12 on the conveyor table 11. The rotation of the conveyor roller 12 can realize the conveying of the packaging carton. During the conveying process, the two pressure roller assemblies 2 can press and limit the opposite sides of the packaging carton, thereby preventing the packaging carton from tilting during the conveying process.

[0032] According to the different widths of the packaging carton, the horizontal cylinders 21 on both sides of the conveyor plate 11 can be activated to push the adjusting seat 22 to adjust its position (that is, according to the different widths of the packaging carton, the distance between the two adjusting seats 22 can be adjusted so that the pressure rollers 23 on the two adjusting seats 22 can respectively abut against the two sides of the packaging carton in the width direction, so as to prevent the packaging carton from tilting or other phenomena during the conveying process).

[0033] During the transportation of the packaging cartons, the vacuum cleaner is activated. The residual paper scraps and dust on the packaging cartons can be sucked in through the suction holes 32 on the outer wall of the suction pipe 31 by the vacuum cleaner. This can prevent the paper scraps and dust from falling into the printing equipment during the later printing process and affecting the printing quality. At the same time, it also improves the cleanliness of the printed surface of the packaging cartons.

[0034] Example 2 Based on Example 1, such as Figures 1 to 6 , Figures 9 to 10 As shown, multiple conveyor roller grooves 13 are arranged side-by-side at intervals on the conveyor platform 11. A lifting cylinder 14 is installed on the bottom surface of each conveyor roller groove 13. A conveyor roller seat 15 is installed on the piston rod of the lifting cylinder 14. Multiple conveyor rollers 12 are arranged along the length of each conveyor roller seat 15. The bottom surface of the adjusting seat 22 is slidably mounted on the top surface of the platform 1, and the conveyor platform 11 is located between two adjusting seats 22. Depending on the width of the packaging carton, the lifting cylinder 14 in the corresponding position of the conveyor roller groove 13 is activated to lift the conveyor roller seat 15, thus lifting each conveyor roller seat 15. Located on the same plane, the packaging carton can be conveyed under the action of the conveying rollers 12 on each conveying roller seat 15 during the conveying process; at the same time, the width direction of the packaging carton can be limited under the action of the two pressure roller assemblies 2 (that is, according to the different widths of the packaging carton, the horizontal cylinder 21 is activated to adjust the distance between the two adjusting seats 22, so that the pressure rollers 23 on the two adjusting seats 22 can respectively abut against the two sides of the width direction of the packaging carton, so as to prevent the packaging carton from tilting or other phenomena during the conveying process, and also to prevent the packaging carton from deviating during the conveying process.

[0035] The pressure roller 23 includes a rotary motor 231, which is embedded in the adjusting seat 22; a limiting plate 232 is fixedly mounted on the side wall of the adjusting seat 22, and the output shaft of the rotary motor 231 movably passes through the limiting plate 232; an arc-shaped pressure plate 233 is mounted on the side wall of the limiting plate 232 away from the adjusting seat 22, and the arc-shaped opening of the arc-shaped pressure plate 233 faces the top surface of the platform 1; a conveyor plate 234 is movably mounted in the arc-shaped opening of the arc-shaped pressure plate 233, and the conveyor plate 234 is coaxially connected to the output shaft of the rotary motor 231; both ends of the arc-shaped opening of the arc-shaped pressure plate 233 are connected to semi-circular guide plates 236 through a rotating shaft 235 with a torsion spring, the arc-shaped top of the semi-circular guide plate 236 faces the top surface of the platform 1, and the distance from the arc-shaped top of the semi-circular guide plate 236 to the top surface of the conveyor plate 11 is the same as the distance from the conveyor plate 234 to the top surface of the conveyor plate 11; depending on the different widths of the packaging cartons, the starting... After the horizontal cylinder 21 adjusts the distance between the two adjusting seats 22, when the packaging carton is placed on the conveyor roller 12 for conveying, the side of the packaging carton will first contact the arc-shaped top of the semi-circular guide plate 236. The packaging carton will be smoothly conveyed under the guidance of the semi-circular guide plate 236. When the packaging carton passes the arc-shaped top position of the semi-circular guide plate 236, even if the packaging carton has a curled edge, it can still enter under the conveyor plate 234 under the guidance of the semi-circular guide plate 236 (so that the conveyor plate 234 and the packaging carton are in contact). The conveyor plate 234, driven by the rotating motor 231, can thus play a role in transporting the packaging carton. At the same time, since the semi-circular guide plate 236 is connected to both ends of the arc-shaped opening of the arc-shaped pressure plate 233 through the rotating shaft 235 with torsion spring, the packaging carton will not get stuck when it passes the arc-shaped top position of the semi-circular guide plate 236.

[0036] Example 3 Based on Example 1, such as Figure 1 , Figures 6 to 10 As shown, the suction pipe 31 includes a middle pipe 311, which is disposed between two adjacent pressure rollers 23 and is parallel to each other above the platform 1. The suction hole 32 is disposed on the outer peripheral wall of the middle pipe 311. An adjusting pipe 312 is movably sleeved at both ends of the middle pipe 311 along its length. A connecting pipe 313 is coaxially disposed at the end of the adjusting pipe 312 away from the middle pipe 311. Both the connecting pipe 313 and the adjusting pipe 312 are connected to the vacuum cleaner. The pipe hole 314 is disposed on the side wall of the limiting plate 232, and the end of the connecting pipe 313 away from the adjusting pipe 312 is movably inserted into the corresponding position of the pipe hole 314.

[0037] During the transportation of the packaging cartons, when the cartons pass below the suction pipe 31, the residual paper dust on the cartons can be sucked in through the suction holes 32 on the outer wall of the intermediate pipe 311 by the vacuum cleaner (after being sucked in through the suction holes 32, the residual paper dust on the cartons then passes through the regulating pipe 312 and the connecting pipe 313 in sequence before entering the vacuum cleaner). This prevents the paper dust from falling into the printing equipment during the later printing process and affecting the printing quality, while also improving the cleanliness of the printed surface of the packaging cartons.

[0038] When the distance between the two adjusting seats 22 (i.e., the distance between the two limiting discs 232) is adjusted by activating the horizontal cylinder 21 according to the different widths of the packaging cartons, the two limiting discs 232 can squeeze the connecting pipe 313 and the adjusting pipe 312 when they approach each other. This allows the adjusting pipe 312 to slide outside the middle pipe 311 (i.e., the two adjusting pipes 312 move towards each other), thereby adjusting the overall length of the suction pipe 31. This ensures that the middle pipe 311 can always be adapted to packaging cartons of different widths, preventing insufficient suction range and improving the applicability to packaging cartons of different widths.

[0039] Both the cross-section of the tube hole 314 and the cross-section of the connecting tube 313 are polygonal, and the shape and size of the cross-section of the tube hole 314 are the same as the shape and size of the cross-section of the connecting tube 313; this can prevent the two limiting discs 232 from getting close to each other. When the connecting tube 313 and the adjusting tube 312 are squeezed, the connecting tube 313 and the adjusting tube 312 will rotate, which helps to keep the position of the intermediate tube 311, the connecting tube 313 and the adjusting tube 312 stable.

[0040] The vacuum hose 31 can also be removed when it is not needed.

[0041] Example 4 Based on Example 1, such as Figures 1 to 2 , Figures 6 to 10 As shown, a pressure plate 315 is movably sleeved on the outside of the connecting pipe 313. A return spring 316 is provided between the pressure plate 315 and the adjusting pipe 312. The two ends of the return spring 316 are connected to the pressure plate 315 and the adjusting pipe 312 respectively. The pressure plate 315 abuts against the side wall of the conveying disc 234 away from the adjusting seat 22. When the distance between the two adjusting seats 22 is adjusted by starting the horizontal cylinder 21 according to the packaging carton of different widths, when the two limiting discs 232 approach each other, they can squeeze the connecting pipe 313 and the adjusting pipe 312. At this time, the limiting discs 232 can squeeze the pressure plate 315, thereby compressing the return spring 316, which helps to prevent the end of the connecting pipe 313 away from the adjusting pipe 312 from becoming loose in the pipe hole 314.

[0042] Example 5 Based on Example 1, such as Figure 1 , Figure 3 , Figures 7 to 8 As shown, the conveyor roller grooves 13 are arranged side by side and spaced along the length of the intermediate tube 311, and the length of the intermediate tube 311 is greater than the distance between the two conveyor roller grooves 13 located at the outermost ends. According to the different sizes of the packaging cartons, the adjusting tube 312 can be slidably adjusted at both ends of the length of the intermediate tube 311 to better match the size of the packaging cartons, thereby facilitating the adsorption of dust adhering to the packaging cartons during transportation and improving printing quality.

[0043] The length of the intermediate tube 311 is more than twice the length of the adjusting tube 312; the adjusting tube 312 can be slidably adjusted at both ends of the intermediate tube 311 according to different sizes of packaging cartons, so as to better adapt to the size of the packaging cartons; at the same time, when the adjusting tube 312 is fully extended to its maximum length (that is, when the two adjusting tubes 312 move away from each other), the intermediate tube 311 still has a certain length and remains overlapping and sleeved with the two adjusting tubes 312, thereby ensuring the overall structural strength of the vacuum tube 31 and preventing the vacuum tube 31 from sagging and deforming in the middle due to the excessive extension length of the adjusting tube 312, which would affect its service life.

[0044] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A packaging printing conveying structure, characterized in that, include: A platform (1) is provided on the platform (1), and a conveyor plate (11) is provided on the conveyor plate (11) with multiple conveyor rollers (12) arranged side by side at intervals. There are two pressure roller assemblies (2), and a pressure roller assembly (2) is movably installed on each of the opposite sides of the conveyor plate (11). A number of suction pipe assemblies (3) are arranged parallel to each other above the conveyor plate (11). Among them, the pressure roller assembly (2) includes two horizontal cylinders (21) symmetrically arranged on the conveyor plate (11). Each horizontal cylinder (21) has an adjusting seat (22) movably connected to its piston rod. Multiple pressure rollers (23) are spaced apart on the side wall of the adjusting seat (22) near the end of the conveyor plate (11). The pressure rollers (23) are distributed in parallel on the horizontal plane. The suction pipe assembly (3) includes a vacuum cleaner installed outside the platform (1). A suction pipe (31) connected to the vacuum cleaner is installed between two adjacent pressure rollers (23). Multiple suction holes (32) are provided on the outer peripheral wall of the suction pipe (31), and the suction holes (32) face the conveyor plate (11).

2. The packaging printing conveying structure as described in claim 1, characterized in that, Multiple conveying roller grooves (13) are arranged side by side on the conveying platform (11). A lifting cylinder (14) is provided on the bottom surface of each conveying roller groove (13). A conveying roller seat (15) is provided on the piston rod of the lifting cylinder (14). Multiple conveying rollers (12) are provided on each conveying roller seat (15) along the length direction.

3. The packaging printing conveying structure as described in claim 2, characterized in that, The bottom surface of the adjusting seat (22) is slidably set on the top surface of the platform (1), and the conveying platform (11) is located between the two adjusting seats (22).

4. The packaging printing conveying structure as described in claim 3, characterized in that, The pressure roller (23) includes: Rotary motor (231) is embedded in adjustment seat (22); The limiting plate (232) is fixedly installed on the side wall of the adjusting seat (22), and the output shaft of the rotating motor (231) moves through the limiting plate (232). Arc-shaped pressure plate (233) is set on the side wall of the limiting plate (232) away from the adjusting seat (22), and the arc-shaped opening of the arc-shaped pressure plate (233) faces the top surface of the base (1); The conveyor plate (234) is movably disposed in the arc-shaped opening of the arc-shaped pressure plate (233), and the conveyor plate (234) is coaxially connected to the output shaft of the rotating motor (231).

5. The packaging printing conveying structure as described in claim 4, characterized in that, Both ends of the arc-shaped opening of the arc-shaped pressure plate (233) are connected to semi-circular guide plates (236) through a rotating shaft (235) with a torsion spring. The arc-shaped top of the semi-circular guide plate (236) faces the top surface of the platform (1), and the distance from the arc-shaped top of the semi-circular guide plate (236) to the top surface of the conveying platform (11) is the same as the distance from the conveying disc (234) to the top surface of the conveying platform (11).

6. The packaging printing conveying structure as described in claim 4, characterized in that, The vacuum tube (31) includes: The intermediate tube (311) is set between two adjacent pressure rollers (23), and the intermediate tubes (311) are set parallel to each other above the platform (1). The dust suction hole (32) is set on the outer peripheral wall of the intermediate tube (311). An adjusting tube (312) is movably fitted at both ends of the intermediate tube (311) along its length. A connecting pipe (313) and an adjusting pipe (312) are coaxially arranged at the end away from the middle pipe (311). Both the connecting pipe (313) and the adjusting pipe (312) are connected to the vacuum cleaner. The tube hole (314) is located on the side wall of the limiting plate (232), and the end of the connecting tube (313) away from the adjusting tube (312) is movably inserted into the tube hole (314) at the corresponding position.

7. The packaging printing conveying structure as described in claim 6, characterized in that, The cross-sections of the bore (314) and the connecting pipe (313) are both polygonal, and the shape and size of the cross-section of the bore (314) are the same as the shape and size of the cross-section of the connecting pipe (313).

8. The packaging printing conveying structure as described in claim 6, characterized in that, A pressure plate (315) is movably sleeved on the outside of the connecting pipe (313). A return spring (316) is provided between the pressure plate (315) and the adjusting pipe (312). The two ends of the return spring (316) are connected to the pressure plate (315) and the adjusting pipe (312) respectively. The pressure plate (315) abuts against the side wall of the conveying disc (234) away from the adjusting seat (22).

9. A packaging printing conveying structure as described in claim 6, characterized in that, The conveying roller grooves (13) are arranged side by side and spaced along the length of the intermediate tube (311), and the length of the intermediate tube (311) is greater than the distance between the two conveying roller grooves (13) located at the outermost ends.

10. A packaging printing conveying structure as described in claim 6, characterized in that, The length of the intermediate tube (311) is more than twice the length of the regulating tube (312).

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