Unwinding and winding tension adjusting structure of printing machine

Abstract

The unwinding and winding tension adjusting structure of the printing machine comprises a base and first supporting frames, the first supporting frames are symmetrically installed at the top end of the base, two sets of second supporting frames are symmetrically installed at the positions, on one sides of the first supporting frames, of the top end of the base, and limiting rollers are movably installed between the two sets of second supporting frames. Third supporting frames are symmetrically installed at the positions, on one side of the second supporting frame, of the top end of the base, electric push rods are installed at the top ends of the first supporting frames correspondingly, push arms are installed at the output ends of the electric push rods correspondingly, first sliding blocks are installed at the bottom ends of the push arms correspondingly, and the first sliding blocks are slidably connected with the first supporting frames. According to the utility model, not only are the convenient limiting and matched tensioning of the printing material and the cleaning of dust and impurities on the surface of the printing material in a clinging type rolling and sweeping manner realized, but also the centering clamping and limiting of the printing material are facilitated, and the smoothness and accuracy of the printing material during printing and the printing quality are improved.

Description

Technical Field

[0001] This utility model relates to the field of tension adjustment structure technology, specifically to an unwinding and rewinding tension adjustment structure for a printing press. Background Technology

[0002] A printing press is a machine that prints images and text onto materials such as paper, plastic, and metal sheets. It is an indispensable part of modern industry, used to manufacture various types of printed materials, such as books, newspapers, posters, business cards, and advertisements. During the printing process, the printing material needs to be unwound to the printing position on the press. If the unwound length is too long, the material will deform, affecting the printing effect. Therefore, the printing material needs to be tensioned and flattened during printing. To better achieve this tensioning, a printing press unwinding and rewinding tension adjustment structure is proposed.

[0003] As disclosed in CN221916661U, a printing press unwinding and rewinding tension adjustment system and a printing press include a frame, an unwinding mechanism, and a rewinding mechanism. The unwinding and rewinding tension adjustment system further includes a first tension detection mechanism, a second tension detection mechanism, and a control device. The first tension detection mechanism includes a first deflectable frame, a first cylinder, and a first electronic ruler; the second tension detection mechanism includes a second deflectable frame, a second cylinder, and a second electronic ruler; the control device receives a first detection signal and a second detection signal and controls the operation of the rewinding mechanism and the unwinding mechanism respectively.

[0004] Although it achieves this, because it is equipped with a first tension detection mechanism and a second tension detection mechanism, the control device can control the winding mechanism and the unwinding mechanism to work according to the received first detection signal and second detection signal, and automatically adjust the tension of the substrate;

[0005] However, the existing tension adjustment structure does not solve the problems of inconveniently limiting and tightening the printing material and closely cleaning the dust and impurities on the surface of the printing material during use, nor does it facilitate the centering, clamping, and limiting of the printing material to prevent deviation, thus affecting the smoothness and accuracy of the printing material during printing and the quality of the printing. Utility Model Content

[0006] The purpose of this utility model is to provide a tension adjustment structure for unwinding and rewinding of a printing press, so as to solve the problems in the background art where the tension adjustment structure is not convenient for limiting and tightening the printing material and for cleaning the dust and impurities on the surface of the printing material with a close-fitting roller, which is not conducive to centering, clamping and limiting the printing material to prevent deviation, thus affecting the smoothness and accuracy of the printing material during printing and the quality of printing.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a tension adjustment structure for unwinding and rewinding of a printing press, comprising a base and a first support frame. The first support frame is symmetrically mounted on the top of the base. Two sets of second support frames are symmetrically mounted on the top of the base on one side of the first support frame, and a limit roller is movably mounted between each set of second support frames. A third support frame is symmetrically mounted on the top of the base on one side of the second support frame. An electric push rod is mounted on the top of each of the first support frames. A push arm is mounted on the output end of each electric push rod. A first slider is mounted on the bottom end of each push arm, and the first slider is slidably connected to the first support frame. An adjusting roller is movably mounted between the two sets of first sliders. A carrying roller is provided below the adjusting roller and is movably connected to the first support frame. Second sliders are symmetrically slidably mounted inside each of the third support frames, and a scraper roller is movably mounted between each set of second sliders. An integrated frame is mounted on the side wall of each of the third support frames, and a servo motor is mounted on the side wall of each set of second sliders. The output end of the servo motor is connected to the scraper roller.

[0008] Preferably, each of the limiting rollers is equipped with a stepper motor, and the output end of each stepper motor is equipped with a first bidirectional lead screw, which is movably connected to the limiting roller.

[0009] Preferably, the surface of the first bidirectional lead screw is fitted with two sets of first threaded sleeves, and the first threaded sleeves are threadedly connected to the first bidirectional lead screw, and the first threaded sleeves are slidably connected to the limiting roller.

[0010] Preferably, each of the limiting rollers has a clamping ring symmetrically slidably mounted on its surface, and the clamping ring is connected to the first threaded sleeve.

[0011] Preferably, a second bidirectional lead screw is movably installed inside each of the integrated frames, and an adjustment motor is provided at the top of each of the integrated frames, with the output end of the adjustment motor connected to the second bidirectional lead screw.

[0012] Preferably, the surface of the second bidirectional lead screw is fitted with two sets of second threaded sleeves, and the second threaded sleeves are threadedly connected to the second bidirectional lead screw, and the second threaded sleeves are connected to the second slider.

[0013] Compared with the prior art, the beneficial effects of this utility model are: the tension adjustment structure not only realizes convenient limiting and tensioning of printing materials and close-fitting roller sweeping to clean dust and impurities on the surface of printing materials, but also facilitates centering, clamping and limiting of printing materials to prevent deviation, and improves the smoothness and accuracy of printing materials during printing as well as the quality of printing.

[0014] An electric push rod drives a push arm to move downwards, which in turn drives a first slider to move downwards. The first slider then drives an adjusting roller to move downwards, bringing the adjusting roller into contact with the printing material. The cooperation between the carrying roller and the adjusting roller causes the printing material to deform, thus tensioning and smoothing it. During its movement, the printing material passes over the surface of a limiting roller. To prevent the printing material from deviating from its intended position, a stepper motor drives a first bidirectional lead screw to rotate. This first bidirectional lead screw drives two sets of first threaded sleeves to move towards each other and approach each other. The first threaded sleeves then drive two sets of clamping rings to approach each other and contact the side of the printing material, clamping and limiting it to prevent deviation. This achieves convenient limiting and tensioning of the printing material, facilitating centering, clamping, and limiting to prevent deviation, and improving the smoothness and accuracy of the printing material during printing.

[0015] Before entering the printing press, the printing material passes between two sets of scraper rollers. An adjusting motor drives a second bidirectional lead screw to rotate, which in turn drives two sets of second threaded sleeves to approach each other. These threaded sleeves, through a second slider, bring the scraper rollers closer together, bringing them into contact with the printing material. A servo motor drives the scraper rollers to rotate, and the two sets of scraper rollers clean the dust and impurities on the upper and lower surfaces of the printing material, ensuring a clean surface and improving the quality of the printed material during printing. This convenient, close-fitting scraping method effectively cleans the surface of the printing material, enhancing the overall printing quality. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0017] Figure 2 This is a frontal cross-sectional view of the present invention.

[0018] Figure 3 This is a three-dimensional perspective view of the limiting roller of this utility model;

[0019] Figure 4 This is a three-dimensional perspective structural diagram of the third support frame of this utility model;

[0020] Figure 5 This is a rear cross-sectional view of the integrated frame of this utility model.

[0021] In the diagram: 1. Base; 2. First support frame; 3. Electric push rod; 4. Push arm; 5. First slider; 6. Limiting roller; 7. Second support frame; 8. Bearing roller; 9. Adjusting roller; 10. Integrated frame; 11. Third support frame; 12. Servo motor; 13. Scraper roller; 14. Stepper motor; 15. First bidirectional lead screw; 16. First threaded sleeve; 17. Clamping ring; 18. Second slider; 19. Adjusting motor; 20. Second threaded sleeve; 21. Second bidirectional lead screw. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] Please see Figure 1-5 This utility model provides an embodiment of a printing press unwinding and rewinding tension adjustment structure, comprising a base 1 and a first support frame 2. The first support frame 2 is symmetrically mounted on the top of the base 1. Two sets of second support frames 7 are symmetrically mounted on the top of the base 1 on one side of the first support frame 2, and a limit roller 6 is movably mounted between each set of second support frames 7. A third support frame 11 is symmetrically mounted on the top of the base 1 on one side of the second support frame 7. An electric push rod 3 is mounted on the top of each of the first support frames 2, serving as a power drive. A push arm 4 is mounted on the output end of each electric push rod 3, and the bottom end of each push arm 4... A first slider 5 is installed, and the first slider 5 is slidably connected to the first support frame 2. An adjusting roller 9 is movably installed between the two sets of first sliders 5. A bearing roller 8 is provided below the adjusting roller 9, and the bearing roller 8 is movably connected to the first support frame 2. Second sliders 18 are symmetrically slidably installed inside the third support frame 11, and a scraping roller 13 is movably installed between the two sets of second sliders 18. An integrated frame 10 is installed on the side wall of the third support frame 11, and a servo motor 12 is installed on the side wall of each set of second sliders 18. The output end of the servo motor 12 is connected to the scraping roller 13.

[0024] Each limiting roller 6 is equipped with a stepper motor 14, which serves as a power drive. Each stepper motor 14 has a first bidirectional lead screw 15 installed at its output end, and the first bidirectional lead screw 15 is movably connected to the limiting roller 6.

[0025] Two sets of first threaded sleeves 16 are fitted on the surface of the first bidirectional lead screw 15, and the first threaded sleeves 16 are threadedly connected to the first bidirectional lead screw 15, and the first threaded sleeves 16 are slidably connected to the limiting roller 6.

[0026] Clamping rings 17 are symmetrically slidably mounted on the surface of the limiting roller 6, and the clamping rings 17 are connected to the first threaded sleeve 16.

[0027] The printing material is drawn from between the carrier roller 8 and the adjusting roller 9, the upper surface of one set of limiting rollers 6, the lower surface of another set of limiting rollers 6, and between the two sets of scraper rollers 13 to the printing position of the printing press. The printing press moves the printing material and prints on it. When tensioning of the printing material is required, the electric push rod 3 is activated, which drives the push arm 4 downward. The push arm 4 drives the first slider 5 downward, which in turn drives the adjusting roller 9 downward, so that the adjusting roller 9 contacts the printing material. With the cooperation of the carrier roller 8 and the adjusting roller 9, the printing material is deformed, thereby tensioning the printed material. The material is tensioned and smoothed. During the movement of the printing material, it will pass over the surface of the limiting roller 6. In order to prevent the printing material from deviating from its position, the stepper motor 14 is turned on. The stepper motor 14 drives the first bidirectional lead screw 15 to rotate. The first bidirectional lead screw 15 drives the two sets of first threaded sleeves 16 to move towards each other and approach each other. The first threaded sleeves 16 drive the two sets of clamping rings 17 to approach each other and contact the side of the printing material to clamp and limit the printing material to prevent it from deviating. This realizes convenient limiting and tensioning of the printing material, which facilitates the centering, clamping and limiting of the printing material to prevent it from deviating from its position, and improves the smoothness and accuracy of the printing material during printing.

[0028] The integrated frame 10 has a second bidirectional lead screw 21 installed inside it. The top of the integrated frame 10 is equipped with an adjustment motor 19, which plays a power driving role. The output end of the adjustment motor 19 is connected to the second bidirectional lead screw 21.

[0029] The surface of the second bidirectional lead screw 21 is fitted with two sets of second threaded sleeves 20, and the second threaded sleeves 20 are threadedly connected to the second bidirectional lead screw 21, and the second threaded sleeves 20 are connected to the second slider 18.

[0030] Before entering the printing press, the printing material passes between two sets of scraper rollers 13. The adjusting motor 19 is turned on, driving the second bidirectional lead screw 21 to rotate. With the second bidirectional lead screw 21 threadedly connected to the second threaded sleeve 20, the second bidirectional lead screw 21 drives the two sets of second threaded sleeves 20 to approach each other. The second threaded sleeves 20, through the second slider 18, drive the scraper rollers 13 to approach each other and contact the printing material. Then, the servo motor 12 is turned on, driving the scraper rollers 13 to rotate. The two sets of scraper rollers 13 then perform a rolling sweeping clean of dust and impurities on the upper and lower surfaces of the printing material, ensuring a clean surface and improving the quality of the printing material during printing. This achieves convenient, close-fitting rolling sweeping clean of dust and impurities on the surface of the printing material, thus improving the quality of the printing material during printing.

[0031] Working principle: The electric push rod 3 drives the push arm 4 to move downward, which in turn drives the first slider 5 to move downward. The first slider 5 then drives the adjusting roller 9 to move downward, so that the adjusting roller 9 contacts the printing material, causing the printing material to deform and thus tensioning and smoothing it. During the movement, the printing material passes over the surface of the limiting roller 6. To prevent the printing material from deviating from its position, the stepper motor 14 drives the first bidirectional lead screw 15 to rotate. The first bidirectional lead screw 15 drives the two sets of first threaded sleeves 16 to move towards each other and approach each other. The first threaded sleeves 16 drive the two sets of clamping rings 17 to approach each other and contact the side of the printing material, thus clamping the printing material. To prevent deviation, the printing material passes between two sets of scraper rollers 13 before entering the printing press. The adjusting motor 19 drives the second bidirectional lead screw 21 to rotate, which in turn drives the two sets of second threaded sleeves 20 to move closer together. The second threaded sleeves 20, through the second slider 18, drive the scraper rollers 13 to move closer together and make them contact the printing material. The servo motor 12 drives the scraper rollers 13 to rotate. The two sets of scraper rollers 13 clean the dust and impurities on the upper and lower surfaces of the printing material, making the surface clean and thus improving the quality of the printing material during printing. The above is the complete usage of the unwinding and rewinding tension adjustment structure of the printing press.

Claims

1. A printing machine unwinding and winding tension adjusting structure comprising a base (1) and a first support frame (2), characterized in that: A first support frame (2) is symmetrically installed on the top of the base (1). Two sets of second support frames (7) are symmetrically installed on the top of the base (1) on one side of the first support frame (2). Limiting rollers (6) are movably installed between the two sets of second support frames (7). A third support frame (11) is symmetrically installed on the top of the base (1) on one side of the second support frame (7). An electric push rod (3) is installed on the top of each of the first support frames (2). A push arm (4) is installed at the output end of each of the electric push rods (3). A first slider (5) is installed at the bottom end of each push arm (4). The first slider (5) slides against the first support frame (2). The two sets of first sliders (5) are connected and an adjusting roller (9) is movably installed between them. A bearing roller (8) is provided below the adjusting roller (9) and the bearing roller (8) is movably connected to the first support frame (2). The second sliders (18) are symmetrically slidably installed inside the third support frame (11), and a scraping roller (13) is movably installed between the two sets of second sliders (18). An integrated frame (10) is installed on the side wall of the third support frame (11), and a servo motor (12) is installed on the side wall of each set of second sliders (18). The output end of the servo motor (12) is connected to the scraping roller (13).

2. The unwind and rewind tension adjustment structure for a printing press according to claim 1, wherein: Each of the limiting rollers (6) is equipped with a stepper motor (14), and each of the stepper motors (14) is equipped with a first bidirectional lead screw (15) at its output end. The first bidirectional lead screw (15) is movably connected to the limiting roller (6).

3. The unwind and rewind tension adjustment structure for a printing press according to claim 2, wherein: The surface of the first bidirectional lead screw (15) is fitted with two sets of first threaded sleeves (16), and the first threaded sleeves (16) are threadedly connected to the first bidirectional lead screw (15), and the first threaded sleeves (16) are slidably connected to the limiting roller (6).

4. The unwind and rewind tension adjustment structure for a printing press according to claim 1, wherein: Each of the limiting rollers (6) has a clamping ring (17) symmetrically slidably mounted on its surface, and the clamping ring (17) is connected to the first threaded sleeve (16).

5. The unwind and take-up tension adjustment structure for a printing press according to claim 1 wherein: The integrated frame (10) is equipped with a second bidirectional lead screw (21) inside each of the integrated frames (10), and an adjustment motor (19) is provided at the top of each of the integrated frames (10), and the output end of the adjustment motor (19) is connected to the second bidirectional lead screw (21).

6. The unwind and rewind tension adjustment structure for a printing press according to claim 5 wherein: The surface of the second bidirectional lead screw (21) is fitted with two sets of second threaded sleeves (20), and the second threaded sleeves (20) are threadedly connected to the second bidirectional lead screw (21), and the second threaded sleeves (20) are connected to the second slider (18).

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