Printing equipment capable of automatically adjusting tension of paper

Abstract

The utility model relates to the technical field of printing machines, and discloses printing equipment capable of automatically adjusting paper tension, which comprises a printing machine, the inner wall of the printing machine is rotatably connected with a plurality of conveying rollers, the bottoms of the conveying rollers are provided with correction components, the inner wall of the printing machine is provided with an adjusting component, and the adjusting component comprises an adjusting roller. The adjusting roller is located on the inner wall of the printing machine, sliding grooves are formed in the two sides of the inner wall of the printing machine, the two ends of the adjusting roller are slidably connected to the inner walls of the multiple sliding grooves, a rotating shaft is rotationally connected to the interior of the printing machine, and a worm wheel is fixedly connected to one end of the rotating shaft. According to the paper surface tension adjusting device, the first transmission plate is driven by the fixing plate to rotate, the adjusting roller is pushed by the transmission assembly to move up and down on the inner wall of the sliding groove, then the height of the adjusting roller is fixed through the self-locking performance between the worm and the worm wheel, the tension adjusting effect on the paper surface is achieved, and the quality and consistency of printed matter are improved; the rejection rate is reduced.

Description

Technical Field

[0001] This utility model relates to the field of printing presses, and more particularly to a printing device that automatically adjusts paper tension. Background Technology

[0002] Paper printing equipment is an indispensable core piece of equipment in modern publishing, packaging, and advertising industries. Its technological level directly determines the quality, production efficiency, and cost of printed materials. As the market's demands for the refinement and consistency of printed materials continue to increase, printing equipment is rapidly developing towards higher speeds, automation, and precision. Throughout the printing process, the state control of paper as the substrate during high-speed transport is one of the key aspects of ensuring final print quality. This is especially true in multi-color printing and high-quality image reproduction, where precise control of the paper's physical state is paramount. Among these, stable control of paper tension remains a core technical challenge throughout the entire process.

[0003] In existing technologies, some printing equipment typically employs floating rollers or oscillating roller mechanisms to control paper tension during transport. These mechanisms apply pressure to a movable roller via springs, cylinders, or counterweights, causing it to press against the paper. When the paper tension changes, the floating roller oscillates up and down or back and forth. A position sensor detects these displacement changes and feeds the signal back to the control system, which then adjusts the braking torque of the unwinding shaft or the speed of the drive motor, thereby indirectly adjusting the paper tension. This feedback control method can achieve automatic tension adjustment to a certain extent and is currently a widely used technical solution.

[0004] However, the aforementioned existing technologies have inherent defects in practical applications. The main problem lies in the insufficient stability and precision of tension control. Because the floating roller adjustment system relies on indirect feedback from mechanical displacement, the entire adjustment chain suffers from significant response delays and inertial effects. When the printing press starts, stops, or experiences a sudden change in speed, the system cannot compensate instantaneously, easily leading to drastic fluctuations in paper tension. Furthermore, these adjustment mechanisms typically lack precise and reliable self-locking capabilities. Under the continuous vibration generated by prolonged high-speed operation of the equipment, the adjusted roller position is prone to slight shifts, causing the set tension value to be unstable. This unstable paper tension directly triggers a series of serious production problems, such as misregistration in multi-color printing, color drift in patterns, or the formation of persistent wrinkles on the paper surface. In severe cases, it can even cause paper breakage, interrupting production and severely affecting the quality and consistency of printed materials, resulting in a high scrap rate. Therefore, an automatic paper tension adjustment printing device is proposed to solve these problems. Summary of the Invention

[0005] To overcome the above shortcomings, this utility model provides a printing device that automatically adjusts paper tension, aiming to improve the problems of misregistration, color drift, paper wrinkling, and even breakage that are easily caused by unstable paper tension in traditional printing equipment.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A printing device for automatically adjusting paper tension includes a printing press, wherein a plurality of conveying rollers are rotatably connected to the inner wall of the printing press, a correction component is provided at the bottom of the plurality of conveying rollers, and an adjustment component is provided on the inner wall of the printing press.

[0008] The adjusting assembly includes an adjusting roller located on the inner wall of the printing press. Slide grooves are formed on both sides of the inner wall of the printing press. The two ends of the adjusting roller are slidably connected to the inner walls of multiple slide grooves. A rotating shaft is rotatably connected inside the printing press. A worm gear is fixedly connected to one end of the rotating shaft. A fixed plate and a support plate are fixedly connected to one side of the printing press. A motor is fixedly connected to one side of the fixed plate. A worm is fixedly connected to the output end of the motor. One end of the worm is rotatably connected inside the support plate. The worm meshes with the worm wheel. Multiple transmission plates are fixedly connected to the outer wall of the rotating shaft. A transmission assembly is provided on the outer wall of each transmission plate.

[0009] As a further description of the above technical solution:

[0010] Each of the transmission components includes a connecting strip 1, and each connecting strip 1 is rotatably connected inside the transmission plate 1. A support plate 2 is fixedly connected to the inner wall of the printing machine.

[0011] As a further description of the above technical solution:

[0012] The top of the second support plate is fixedly connected to multiple connecting seats, and the rotating shaft is rotatably connected inside the multiple connecting seats. Two adjacent connecting seats are located on both sides of the first transmission plate.

[0013] As a further description of the above technical solution:

[0014] Each of the connecting strips has a connecting rod rotatably connected to its outer wall, and a connecting strip II is rotatably connected inside each connecting rod. A transmission plate II is fixedly connected to one end of each connecting strip II, and a limit ring is rotatably connected inside each transmission plate II. The inner walls of multiple limit rings are fixedly connected to the outer wall of the adjusting roller.

[0015] As a further description of the above technical solution:

[0016] The correction assembly includes a first air duct and multiple second air ducts, which are located at the bottom of multiple conveying rollers. Multiple nozzles are fixedly connected to the top of the first air duct and the multiple second air ducts. The angle between the nozzle at the top of the first air duct and its horizontal axis is 90 degrees, and the angle between the nozzle at the top of the multiple second air ducts and its horizontal axis is 60 degrees. A sensor is installed on the outer wall of the printing press for detecting the paper position.

[0017] As a further description of the above technical solution:

[0018] The printing machine has a support frame and a support plate three fixedly connected to its inner wall. A blower is fixedly connected to the inner wall of the support frame. The output end of the blower passes through the support plate three and is fixedly connected to a blower box. The bottom of the blower box is fixedly connected to the top of the support plate three.

[0019] As a further description of the above technical solution:

[0020] The top of the wind box is fixedly connected to the bottom of the first wind duct, and the wind box, the first wind duct, and multiple second wind ducts are connected by multiple delivery hoses.

[0021] As a further description of the above technical solution:

[0022] Multiple motors are fixedly connected to the top of the support plate three. The output shaft of each motor two passes through the support plate three and is fixedly connected to the bottom of the air duct two.

[0023] This utility model has the following beneficial effects:

[0024] In this invention, a fixed plate drives a transmission plate to rotate, and a transmission assembly pushes an adjusting roller to move up and down on the inner wall of a chute. Then, the height of the adjusting roller is fixed by the self-locking property between the worm and the worm wheel, thereby achieving the effect of adjusting the tension of the paper surface. This solves the problems of misregistration, color drift, paper wrinkling, and even breakage that are easily caused by unstable paper tension in traditional printing equipment, improving the quality and consistency of printed products and reducing the scrap rate.

[0025] In this invention, a blower is used to spray air through nozzles at the top of blower 1 and multiple blower 2. The airflow at the top of blower 1 separates the paper from the conveyor roller. Then, the output end of motor 2 on one side drives the corresponding blower 2 to rotate, so that the inclined airflow it sprays will apply a lateral thrust to the bottom of the paper, pushing the deviated paper back to the correct position, thereby correcting the paper position. This solves the problem of lateral deviation of paper due to various factors during high-speed printing, which affects the product's appearance and subsequent cutting accuracy, and improves production efficiency and automation level. Attached Figure Description

[0026] Figure 1 This is a three-dimensional schematic diagram of a printing device that automatically adjusts paper tension according to the present invention.

[0027] Figure 2 This is a schematic diagram of the rotating shaft structure of a printing device that automatically adjusts paper tension, as proposed in this utility model.

[0028] Figure 3 A schematic diagram of the worm gear structure of a printing device for automatically adjusting paper tension according to this utility model;

[0029] Figure 4 This is a schematic diagram of the connecting rod structure of a printing device that automatically adjusts paper tension, as proposed in this utility model.

[0030] Figure 5 This is a schematic diagram of the blower structure of a printing equipment that automatically adjusts paper tension according to this utility model;

[0031] Figure 6 This is a schematic diagram of the conveying hose structure of a printing equipment that automatically adjusts paper tension, as proposed in this utility model.

[0032] Legend:

[0033] 1. Printing press; 2. Conveyor roller; 3. Adjusting roller; 4. Slide groove; 5. Fixing plate; 6. Motor 1; 7. Worm gear; 8. Support plate 1; 9. Worm wheel; 10. Rotating shaft; 11. Support plate 2; 12. Connecting seat; 13. Transmission plate 1; 14. Connecting strip 1; 15. Connecting rod; 16. Connecting strip 2; 17. Transmission plate 2; 18. Limiting ring; 19. Support frame; 20. Blower; 21. Air box; 22. Support plate 3; 23. Air duct 1; 24. Air duct 2; 25. Motor 2; 26. Conveyor hose. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0035] Reference Figures 1-4This utility model provides an embodiment of an automatic paper tension adjustment printing device, including a printing machine 1. Multiple conveyor rollers 2 are rotatably connected to the inner wall of the printing machine 1. These conveyor rollers 2 carry and convey paper, providing a basic platform for subsequent tension adjustment and position correction. Correction components are installed at the bottom of the multiple conveyor rollers 2. When paper deviation is detected, the correction components automatically correct the paper position using a non-contact airflow method, ensuring accurate positioning of the printed pattern. An adjustment component is installed on the inner wall of the printing machine 1. This adjustment component automatically raises and lowers as needed, thereby precisely controlling the paper tension and solving problems such as misregistration and paper wrinkling caused by unstable tension.

[0036] The adjustment assembly includes an adjustment roller 3, which is located on the inner wall of the printing press 1. Slide grooves 4 are provided on both sides of the inner wall of the printing press 1. The two ends of the adjustment roller 3 are slidably connected to the inner walls of the slide grooves 4. The adjustment roller 3, in conjunction with the slide grooves 4, slides stably up and down, achieving the effect of applying or reducing tension on the paper. A rotating shaft 10 is rotatably connected inside the printing press 1. A worm gear 9 is fixedly connected to one end of the rotating shaft 10. A fixed plate 5 and a support plate 8 are fixedly connected to one side of the printing press 1. A motor 6 is fixedly connected to one side of the fixed plate 5. The motor 6 provides the power source for adjustment, and its output end is fixedly connected to... The worm 7 is rotatably connected at one end to the inside of the support plate 8. The worm 7 meshes with the worm wheel 9, and the worm 7 and worm wheel 9 perform meshing transmission, converting the rotational motion of the motor into the stable rotation of the rotating shaft 10. Simultaneously, utilizing its self-locking characteristic after meshing, it achieves the effect of stably fixing the height of the adjusting roller 3 at any position. Multiple transmission plates 13 are fixedly connected to the outer wall of the rotating shaft 10. Each transmission plate 13 has a transmission assembly on its outer wall. This transmission assembly is used to convert the rotational motion of the rotating shaft 10 into the vertical lifting motion of the adjusting roller 3. Each transmission assembly includes a connecting... Each connecting bar 14 is rotatably connected to the inside of the transmission plate 13. A support plate 2 11 is fixedly connected to the inner wall of the printing machine 1. Multiple connecting seats 12 are fixedly connected to the top of the support plate 2 11. The rotating shaft 10 is rotatably connected to the inside of the multiple connecting seats 12. The connecting seats 12 are used to stably support the rotating shaft 10 and ensure its rotational accuracy. Two adjacent connecting seats 12 are located on both sides of the transmission plate 13. A connecting rod 15 is rotatably connected to the outer wall of each connecting bar 14. A connecting bar 2 16 is rotatably connected inside each connecting rod 15. One end of each connecting bar 2 16 is fixedly connected to... The transmission plate 17, transmission plate 13, connecting strip 14, connecting rod 15, connecting strip 16, and transmission plate 17 together form a complete linkage transmission mechanism, which achieves the purpose of smoothly converting rotary motion into linear motion. Each transmission plate 17 has a rotatably connected limit ring 18 inside. The inner walls of multiple limit rings 18 are fixedly connected to the outer wall of the adjusting roller 3. The limit rings 18 are used to allow the adjusting roller 3 to rotate freely, and at the same time transmit the lifting force of the transmission plate 17 to the adjusting roller 3, thereby preventing the rotation of the adjusting roller 3 itself from interfering with the lifting mechanism.

[0037] Reference Figure 2 , Figure 5 and Figure 6The correction assembly includes a first air duct 23 and multiple second air ducts 24, located at the bottom of multiple conveyor rollers 2. Multiple nozzles are fixedly connected to the top of the first air duct 23 and the multiple second air ducts 24. The nozzle at the top of the first air duct 23 forms a 90-degree angle with its horizontal axis, generating a vertically upward airflow to form an air cushion, effectively separating the paper from the conveyor rollers 2 and reducing friction. The nozzles at the top of the multiple second air ducts 24 form a 60-degree angle with their horizontal axes, generating an airflow with a lateral component. By selectively rotating the second air ducts 24, the paper can be driven laterally to correct its position, or pushed forward without rotation. A sensor is installed on the outer wall of the printing press 1 to detect the paper edge position in real-time without contact and feeds a signal back to the control system, achieving high sensitivity in detecting deviation problems. A support frame 19 is fixedly connected to the inner wall of the printing press 1. A blower 20 is fixedly connected to the inner wall of the support plate 3 22 and the support frame 19. The blower 20 serves as the power source for the entire correction assembly, providing sufficient air for subsequent airflow correction. The output end of the blower 20 passes through the support plate 3 22 and is fixedly connected to a bellows 21. The bottom of the bellows 21 is fixedly connected to the top of the support plate 3 22. The bellows 21 is used to collect and stabilize the airflow blown out from the blower 20, preparing for subsequent airflow distribution. The top of the bellows 21 is fixedly connected to the bottom of the first air duct 23. The bellows 21, the first air duct 23, and multiple second air ducts 24 are connected through multiple delivery hoses 26. This connection method is used to accurately distribute the airflow to each air duct. Multiple second motors 25 are fixedly connected to the top of the support plate 3 22. The output shaft of each second motor 25 passes through the support plate 3 22 and is fixedly connected to the bottom of the second air duct 24. The second motor 25 works in conjunction with the rotatable second air duct 24 to selectively rotate. By changing the direction of the inclined airflow, it achieves the effect of accurately driving the paper to move to the left or right to achieve the correction effect.

[0038] Working principle: During the adjustment of paper surface tension, motor 6 is started, and the output of motor 6 drives worm 7 to rotate. Since worm 7 is meshed with worm wheel 9, the rotation of worm 7 will drive worm wheel 9 and shaft 10 to rotate, causing multiple transmission plates 13 on the outer wall of shaft 10 to rotate as well. Since the two ends of connecting rod 15 are rotatably connected to connecting strip 14 and connecting strip 16 respectively, the rotational force of transmission plate 13 will drive the adjusting roller 3 on the inner wall of transmission plate 17 to slide up and down on the inner wall of slide groove 4 through connecting strip 14, connecting rod 15 and connecting strip 16, using the limiting ring. 18 rotates inside the transmission plate 2 17 to prevent the rotational force of the adjusting roller 3 from affecting the transmission plate 2 17. The paper surface tension is adjusted in a targeted manner by adjusting the up and down movement of the adjusting roller 3. The height of the adjusting roller 3 is fixed by the self-locking property between the worm 7 and the worm wheel 9. This solves the problems of misregistration, color drift, paper wrinkling and even breakage caused by unstable paper tension in traditional printing equipment. It achieves precise and stable control of paper tension, thereby significantly improving the quality and consistency of printed products, reducing the scrap rate, and enhancing the adaptability of the equipment to different weights and materials of paper.

[0039] During the paper position correction process, sensors are used to detect the paper position. When the paper position deviates, the blower 20 is activated, transmitting external air through the air box 21 and multiple conveying hoses 26 to the interior of the first air duct 23 and multiple second air ducts 24. The air is then sprayed onto the bottom of the paper through nozzles at the top of the first air duct 23 and the second air duct 24. The airflow at the top of the first air duct 23 separates the bottom of the paper from the top of the conveying roller 2, reducing friction between the paper and the conveying roller 2. Then, the left or right motor 25 is activated, driving the left or right second air duct 24 to rotate. The tilting of the top of the left or right second air duct 24 further contributes to the rotation. The airflow from the nozzle drives the paper to move to the left or right, while the non-rotating air duct 24 on the other side remains parallel to the bottom of the paper. The airflow from the tilted nozzle at the top of the non-rotating air duct 24 pushes the paper forward, thereby correcting the paper's position. This solves the problem of lateral deviation of the paper due to various factors during high-speed printing, which causes the printed content to deviate from the predetermined position, affecting the product's aesthetics and subsequent cutting accuracy. It achieves non-contact, highly sensitive automatic deviation correction, ensuring that the printed pattern is always in the correct position on the paper, improving production efficiency and automation level, and guaranteeing the quality of the final product.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A printing device for automatically adjusting paper tension, comprising a printing press (1), characterized in that: The printing press (1) has multiple conveying rollers (2) rotatably connected to its inner wall. The bottom of the multiple conveying rollers (2) is provided with a correction component, and the inner wall of the printing press (1) is provided with an adjustment component. The adjustment assembly includes an adjustment roller (3), which is located on the inner wall of the printing machine (1). The inner wall of the printing machine (1) is provided with grooves (4) on both sides. The two ends of the adjustment roller (3) are slidably connected to the inner walls of the multiple grooves (4). The printing machine (1) is rotatably connected to a rotating shaft (10). One end of the rotating shaft (10) is fixedly connected to a worm gear (9). One side of the printing machine (1) is fixedly connected to a fixed plate (5) and a support plate (8). One side of the fixed plate (5) is fixedly connected to a motor (6). The output end of the motor (6) is fixedly connected to a worm (7). One end of the worm (7) is rotatably connected to the inside of the support plate (8). The worm (7) meshes with the worm gear (9). The outer wall of the rotating shaft (10) is fixedly connected to multiple transmission plates (13). Each transmission plate (13) is provided with a transmission assembly on its outer wall.

2. The printing equipment for automatically adjusting paper tension according to claim 1, characterized in that: Each of the transmission components includes a connecting strip (14), each of the connecting strips (14) being rotatably connected inside the transmission plate (13), and a support plate (11) is fixedly connected to the inner wall of the printing press (1).

3. The printing equipment for automatically adjusting paper tension according to claim 2, characterized in that: The top of the second support plate (11) is fixedly connected to a plurality of connecting seats (12), and the rotating shaft (10) is rotatably connected inside the plurality of connecting seats (12). Two adjacent connecting seats (12) are located on both sides of the first transmission plate (13).

4. The printing equipment for automatically adjusting paper tension according to claim 3, characterized in that: Each of the connecting strips (14) has a connecting rod (15) rotatably connected to its outer wall, and a connecting strip (16) rotatably connected to the inside of each connecting rod (15). One end of each connecting strip (16) is fixedly connected to a transmission plate (17), and a limit ring (18) rotatably connected to the inside of each transmission plate (17). The inner walls of the multiple limit rings (18) are fixedly connected to the outer wall of the adjusting roller (3).

5. The printing equipment for automatically adjusting paper tension according to claim 1, characterized in that: The correction assembly includes a first air duct (23) and multiple second air ducts (24). The first air duct (23) and multiple second air ducts (24) are located at the bottom of multiple conveying rollers (2). Multiple nozzles are fixedly connected to the top of the first air duct (23) and multiple second air ducts (24). The angle between the nozzle at the top of the first air duct (23) and its horizontal axis is 90 degrees, and the angle between the nozzle at the top of the multiple second air ducts (24) and its horizontal axis is 60 degrees. A sensor is provided on the outer wall of the printing press (1) for detecting the paper position.

6. The printing equipment for automatically adjusting paper tension according to claim 5, characterized in that: The printing machine (1) has a support frame (19) and a support plate three (22) fixedly connected to its inner wall. A blower (20) is fixedly connected to the inner wall of the support frame (19). The output end of the blower (20) passes through the support plate three (22) and is fixedly connected to a bellows (21). The bottom of the bellows (21) is fixedly connected to the top of the support plate three (22).

7. The printing equipment for automatically adjusting paper tension according to claim 6, characterized in that: The top of the wind box (21) is fixedly connected to the bottom of the first wind duct (23), and the wind box (21) is connected to the first wind duct (23) and multiple second wind ducts (24) through multiple delivery hoses (26).

8. The printing equipment for automatically adjusting paper tension according to claim 7, characterized in that: Multiple motors (25) are fixedly connected to the top of the support plate three (22). The output shaft of each motor (25) passes through the support plate three (22) and is fixedly connected to the bottom of the air duct two (24).

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