Adjusting mechanism for printing machine
By installing liftable second and third rollers on the printing press, combined with cylinder control and brush cleaning, the problems of large space occupation and non-adjustable tension of the guide rollers are solved, improving the space utilization and roll cleanliness of the printing press and enhancing printing quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI QINGFENG DIGITAL TECH CO LTD
- Filing Date
- 2025-06-30
- Publication Date
- 2026-05-15
AI Technical Summary
The existing distribution of guide rollers in printing presses occupies a large space and cannot adjust the tension of the roll material, resulting in low space utilization and poor roll material quality.
The system employs vertically distributed, liftable second and third rollers, combined with lifting cylinders and stroke control mechanisms, to adjust the tension of the roll material. It also cleans impurities from the roll material surface using a box and brushes, and uses transparent baffles to protect the roll material.
It achieves a wider range of tension adjustment, improves space utilization and roll cleanliness, and enhances printing quality and ease of operation.
Smart Images
Figure CN224242359U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of printing press feeding technology, and in particular to an adjustment mechanism for a printing press. Background Technology
[0002] A printing press is a machine for printing text and images. A modern printing press generally consists of mechanisms for plate mounting, inking, printing, and paper feeding (including folding). Its working principle is as follows: first, the text and images to be printed are made into a printing plate, which is then mounted on the printing press. Ink is then applied manually or by the printing press to the areas on the printing plate containing the text and images. This ink is then directly or indirectly transferred to paper or other substrates (such as textiles, metal plates, plastics, leather, wood, glass, and ceramics), thus reproducing a printed product identical to the printing plate. The practical innovations and development of printing presses have played a vital role in the dissemination of human civilization and culture.
[0003] A printing press mainly consists of a paper feeding mechanism, a plate mounting mechanism, an inking mechanism, and an impression mechanism. The main processes are as follows: paper feeding (roll) → inking (gravure) → impression → rewinding / slitting. The roll unwinding device is located at the front of the machine, and the paper (or plastic) enters the printing unit via guide rollers; the gravure cylinder (engraved with images) is located in the middle of the machine, the ink trough is immersed in the gravure cylinder, the doctor blade is located on one side of the gravure cylinder and is used to remove ink from non-image areas, and the rubber impression cylinder is located on the other side of the gravure cylinder, pressing against it. The paper passes between the two cylinders to complete the printing.
[0004] Regarding the aforementioned technologies, the feeding of printing rolls mainly relies on guide rollers for traction. Existing guide rollers are generally fixed in a horizontal position, which takes up a lot of space and makes it impossible to adjust the position of the guide rollers to change the tension of the roll feed. Therefore, improvements are needed. Utility Model Content
[0005] To facilitate the adjustment of tension during roll feeding, this application provides an adjustment mechanism for a printing press.
[0006] The technical solution for the adjusting mechanism for a printing press provided in this application is as follows:
[0007] An adjustment mechanism for a printing press includes a base, an unwinding assembly, a support roller, a first roller, a second roller, and a third roller. The unwinding assembly is mounted on the base and is used to unwind the roll material. The support roller is connected to the base and is close to the unwinding assembly. The support roller is used to support the unwound roll material.
[0008] The first roller is located below the support roller and is parallel to the support roller; the second roller is located above the first roller and is lifted and lowered on the machine base; the third roller is located below the first roller, and both the second roller and the third roller are parallel to the first roller; the unwound roll material is sequentially drawn into the printing unit by the first roller, the second roller and the third roller.
[0009] By adopting the above technical solution, during feeding, the roll material first passes through the unwinding assembly for unwinding, and then sequentially passes through the support roller, the first roller, the second roller, and the third roller for support and traction before entering the printing unit for printing. By vertically distributing the second and third rollers, the second roller can be raised and lowered along its height, changing the vertical distance between the second and third rollers. This extends the roll material spreading path while also reserving operating space between the feeding unit and the printing unit. Compared to the traditional horizontal spreading path, it offers a wider tension adjustment range, higher space utilization, and is suitable for error correction by operators.
[0010] Preferably, two support rollers are arranged in parallel, and the two support rollers are on the same horizontal plane.
[0011] By adopting the above technical solution, the two support rollers work together to support the coil material, thereby improving the stability of the coil material spreading.
[0012] Preferably, the second roller is raised and lowered on the machine base via an adjusting assembly. The adjusting assembly includes a connecting frame, a mounting base, and a lifting cylinder. The connecting frame is mounted on the machine base, and the mounting base is mounted on the connecting frame and has a U-shaped groove. The roller shaft of the second roller is tangent to the inner wall of the U-shaped groove. The lifting cylinder is located below the mounting base, and the piston rod of the lifting cylinder passes through the mounting base and is connected to the roller shaft of the second roller. The lifting cylinder has a stroke control mechanism and is used to drive the second roller to rise and fall.
[0013] By adopting the above technical solution, when it is necessary to adjust the tension of the coil traction, a lifting cylinder can be operated. The lifting cylinder drives the roller shaft of the second roller to move vertically, thereby changing the vertical distance between the second and third rollers. The cylinder has a stroke control mechanism, which can control the cylinder piston rod to stop at a predetermined position, realizing precise mechanical actions (such as clamping, pushing, lifting, etc.) and providing continuous, stable, and reliable pressure. Typical stroke control mechanisms include, but are not limited to, mechanical stops, magnetic switches with solenoid valves, and displacement sensors with controllers. These are existing technologies and will not be elaborated upon here.
[0014] Preferably, it also includes a housing located between the second roller and the third roller, the housing having a through-hole for the roll material to pass through, and bristles provided on the housing, the bristles being located inside the through-hole and used to clean the roll material.
[0015] By adopting the above technical solution, the roll material, after being pulled by the second roller, can pass through the clearance hole and then be wound onto the third roller. As the roll material is continuously pulled, it will move relative to the box (the box remains stationary). The bristles on the box can sweep away impurities on the roll material, achieving cleaning and improving the quality of subsequent printing.
[0016] Preferably, the housing includes a detachable first housing and a second housing, the first housing being mounted on the base, the second housing being bolted to the first housing, and the brush bristles being mounted on the second housing.
[0017] By adopting the above technical solution, the second box and the first box can be detachably connected by bolt fastening, making it convenient to remove the second box separately and clean the brush bristles.
[0018] Preferably, it further includes a fourth roller and a baffle, the fourth roller being close to the printing unit and on the same horizontal plane as the third roller; the baffle is disposed between the third roller and the fourth roller and is used to shield the roll material.
[0019] By adopting the above technical solution, the roll material is sequentially drawn by the third and fourth rollers before entering the printing unit for printing. The baffle protects the roll material between the third and fourth rollers, reducing contamination.
[0020] Preferably, the baffle is made of a transparent material and is detachably connected to the base.
[0021] By adopting the above technical solution, the baffle made of transparent material allows light to pass through, making it convenient for workers to observe the position of the rolled material. Furthermore, when it is necessary to operate on the rolled material between the third and fourth rollers, the baffle can be removed first, thus creating more space for workers to operate.
[0022] Preferably, the unwinding assembly includes a spool and a limiting sleeve. One end of the spool is rotatably connected to the machine base via a motor. The spool is used for inserting rolled material. The limiting sleeve is detachably connected to the other end of the spool and is used to prevent the rolled material from falling off the spool.
[0023] By adopting the above technical solution, the roll material is wound onto a spool, which can be inserted into a shaft. A limiting sleeve is then used to fix the spool to the other end of the shaft, preventing the roll material from falling off. A motor drives the shaft to rotate, thus allowing the roll material to unwind.
[0024] In summary, this application includes at least one of the following beneficial technical effects:
[0025] (1) By setting the second roller to be liftable, the second roller can be moved up and down according to actual needs during the production process, thereby changing the vertical distance between the second roller and the third roller, and indirectly changing the tension of the coil conveying; compared with the traditional horizontal spreading path, its tension adjustment range is wider and the space utilization rate is higher.
[0026] (2) By setting up a box and brushes, the brushes can clean the roll material passing through the box, remove impurities from the surface of the roll material, so as to improve the quality of the product in subsequent printing processing.
[0027] (3) By setting the box as the first box and the second box, it is convenient to disassemble the second box separately and clean the bristles. Attached Figure Description
[0028] Figure 1 This is a schematic diagram of the adjustment mechanism in the embodiments of this application;
[0029] Figure 2 This is a partial structural schematic diagram of the adjustment mechanism in an embodiment of this application;
[0030] Figure 3 yes Figure 2 An enlarged schematic diagram of part A in the middle.
[0031] Reference numerals: 1. Machine base; 2. Unwinding assembly; 21. Roller; 22. Limiting sleeve; 3. Support roller; 4. First roller; 5. Second roller; 6. Third roller; 7. Adjusting assembly; 71. Connecting frame; 72. Mounting base; 73. Lifting cylinder; 8. U-shaped groove; 9. Housing; 91. First box; 92. Second box; 10. Clearance hole; 11. Brush; 12. Fourth roller; 13. Baffle; 14. Printing unit. Detailed Implementation
[0032] The technical solutions of this application will now be described with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can be embodied in many different forms and is not limited to the embodiments described herein.
[0033] In the representation of this application, the reference to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., means that a specific feature, structure, material, or characteristic represented in connection with that embodiment or example is included in at least one embodiment or example of this application. Moreover, the specific features, structures, materials, or characteristics represented may be combined in any suitable manner in one or more embodiments or examples.
[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.
[0035] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms "installation," "connection," "joining," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection; a detachable connection; an integral part; or a mechanical connection. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.
[0036] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Without conflict, those skilled in the art can combine and integrate the different embodiments or examples shown in this application, as well as the features of those embodiments or examples.
[0037] This application discloses an adjustment mechanism for a printing press. (Refer to...) Figures 1 to 3 The adjusting mechanism includes a base 1, an unwinding assembly 2, a support roller 3, a first roller 4, a second roller 5, and a third roller 6. The base 1 serves as a carrier and is fixedly installed on the ground. The unwinding assembly 2 is mounted on the base 1 and is used to unwind the roll material. The unwinding assembly 2 includes a reel 21 and a limiting sleeve 22. One end of the reel 21 is rotatably connected to the base 1 via a motor, which has a self-locking mechanism. The roll material is generally wound onto a drum, and the reel 21 is used for insertion into the drum. The limiting sleeve 22 is detachably connected to the other end of the reel 21 to prevent the roll material from falling off the reel 21. In this embodiment, the reel 21 is provided with external threads, and the limiting sleeve 22 is fixed to the reel 21 by screwing.
[0038] Support rollers 3 are mounted on the machine base 1 and close to the unwinding assembly 2. Support rollers 3 are used to support the unwound roll material. Two support rollers 3 are arranged in parallel, on the same horizontal plane. A first roller 4 is located below the plane of the two support rollers 3 and is parallel to them. A second roller 5 is located above the first roller 4 and is vertically mounted on the machine base 1, moving vertically. A third roller 6 is located below the first roller 4. Both the second roller 5 and the third roller 6 are parallel to the first roller 4. The unwound roll material is sequentially drawn into the printing unit 14 by the two support rollers 3, the first roller 4, the second roller 5, and the third roller 6.
[0039] Specifically, the second roller 5 is raised and lowered on the machine base 1 via an adjusting assembly 7. The adjusting assembly 7 includes a connecting frame 71, a mounting base 72, and a lifting cylinder 73. The connecting frame 71 is fixedly mounted on the machine base 1. The mounting base 72 is fixedly connected to the connecting frame 71 and has a U-shaped groove 8 with its opening facing upwards. The roller shaft of the second roller 5 is tangent to the inner wall of the U-shaped groove 8, which limits the movement of the roller shaft. The lifting cylinder 73 is located below the mounting base 72. The piston rod of the lifting cylinder 73 passes vertically through the mounting base 72 and is connected to the roller shaft of the second roller 5. The lifting cylinder 73 has a stroke control mechanism for driving the second roller 5 to rise and fall. The stroke control mechanism can control the piston rod to stop at a predetermined position, achieving precise mechanical actions (such as clamping, pushing, lifting, etc.) and providing continuous, stable, and reliable pressure. Adjusting assemblies 7 are provided at both ends of the second roller 5, and the two adjusting assemblies 7 work together to drive the second roller 5 to rise and fall. When it is necessary to adjust the tension of the coil traction, the lifting cylinder 73 can be operated. The lifting cylinder 73 drives the roller shaft of the second roller 5 to move in the vertical direction, thereby changing the vertical distance between the second roller 5 and the third roller 6.
[0040] The machine base 1 is equipped with a housing 9, located between the second roller 5 and the third roller 6. The housing 9 has a through-hole 10 for the roll material to pass through. Brushes 11 are installed on the housing 9, located within the through-hole 10, and are used to clean the roll material passing through the housing 9. After being pulled by the second roller 5, the roll material passes through the through-hole 10 and is then wound onto the third roller 6. As the roll material is continuously pulled, it moves relative to the housing 9 (while the housing 9 remains stationary). The brushes 11 on the housing 9 can sweep away impurities on the roll material, achieving cleaning and improving the quality of subsequent printing. In this embodiment, the housing 9 includes a detachable first housing 91 and a second housing 92. The first housing 91 is fixedly installed on the machine base 1, and the second housing 92 is bolted to the first housing 91. The first housing 91 and the second housing 92 form the through-hole 10, and the brushes 11 are fixedly connected to the second housing 92. Since the second box 92 is detachably connected to the first box 91, it is convenient for staff to remove the second box 92 separately and clean the bristles 11.
[0041] In addition, a fourth roller 12 and a baffle 13 are installed on the machine base 1. The fourth roller 12 is close to the printing unit 14 and is on the same horizontal plane as the third roller 6, and the fourth roller 12 and the third roller 6 are parallel to each other. The baffle 13 is installed between the third roller 6 and the fourth roller 12 to shield the roll material. The baffle 13 is made of transparent material, including but not limited to acrylic and glass. The baffle 13 is detachably connected to the machine base 1 and is fixed to the machine base 1 by plugging or bolting. The roll material is sequentially pulled by the third roller 6 and the fourth roller 12, and then enters the printing unit 14 for printing. The baffle 13 can shield and protect the roll material between the third roller 6 and the fourth roller 12, reducing the contamination of the roll material. The transparent material baffle 13 allows light to pass through, making it convenient for operators to observe the position of the roll material through the baffle 13. Meanwhile, when it is necessary to operate the coil between the third roller 6 and the fourth roller 12, the baffle 13 can be removed first to free up more space for the staff to operate.
[0042] The implementation principle of the adjustment mechanism for a printing press according to an embodiment of this application is as follows: During production, the unwinding assembly 2 first unwinds the roll material. The roll material is then supported and pulled sequentially by the support roller 3, the first roller 4, the second roller 5, and the third roller 6 before entering the printing unit 14 for printing. By vertically distributing the second roller 5 and the third roller 6, the second roller 5 can be raised and lowered along the height direction under the drive of the adjustment assembly 7, thereby changing the vertical distance between the second roller 5 and the third roller 6 and adjusting the tension.
[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. An adjusting mechanism for a printing press, characterized in that, The machine includes a base (1), an unwinding assembly (2), a support roller (3), a first roller (4), a second roller (5), and a third roller (6). The unwinding assembly (2) is mounted on the base (1) and is used to unwind the roll. The support roller (3) is connected to the base (1) and is close to the unwinding assembly (2). The support roller (3) is used to support the unwound roll. The first roller (4) is located below the support roller (3) and is parallel to the support roller (3); the second roller (5) is located above the first roller (4) and is raised and lowered on the machine base (1); the third roller (6) is located below the first roller (4); both the second roller (5) and the third roller (6) are parallel to the first roller (4); the unwound roll is sequentially pulled into the printing unit (14) by the first roller (4), the second roller (5) and the third roller (6).
2. The adjusting mechanism for a printing press according to claim 1, characterized in that, There are two support rollers (3) arranged in parallel, and the two support rollers (3) are on the same horizontal plane.
3. The adjusting mechanism for a printing press according to claim 2, characterized in that, The second roller (5) is raised and lowered on the machine base (1) by an adjustment assembly (7). The adjustment assembly (7) includes a connecting frame (71), a mounting base (72), and a lifting cylinder (73). The connecting frame (71) is located on the machine base (1), and the mounting base (72) is located on the connecting frame (71) and has a U-shaped groove (8). The roller shaft of the second roller (5) is tangent to the inner wall of the U-shaped groove (8). The lifting cylinder (73) is located below the mounting base (72). The piston rod of the lifting cylinder (73) passes through the mounting base (72) and is connected to the roller shaft of the second roller (5). The lifting cylinder (73) has a stroke control mechanism and is used to drive the second roller (5) to rise and fall.
4. The adjusting mechanism for a printing press according to claim 1, characterized in that, It also includes a housing (9) located between the second roller (5) and the third roller (6), the housing (9) having a through hole (10) for the roll material to pass through, and a brush (11) provided on the housing (9), the brush (11) being located inside the through hole (10) and used to clean the roll material.
5. The adjusting mechanism for a printing press according to claim 4, characterized in that, The housing (9) includes a detachable first housing (91) and a second housing (92). The first housing (91) is mounted on the base (1), and the second housing (92) is bolted to the first housing (91). The bristles (11) are mounted on the second housing (92).
6. The adjusting mechanism for a printing press according to claim 1, characterized in that, It also includes a fourth roller (12) and a baffle (13), the fourth roller (12) being close to the printing unit (14) and on the same horizontal plane as the third roller (6); the baffle (13) being located between the third roller (6) and the fourth roller (12) and being used to shield the roll material.
7. The adjusting mechanism for a printing press according to claim 6, characterized in that, The baffle (13) is made of transparent material and is detachably connected to the base (1).
8. The adjusting mechanism for a printing press according to claim 1, characterized in that, The unwinding assembly (2) includes a spool (21) and a limiting sleeve (22). One end of the spool (21) is rotatably connected to the machine base (1) via a motor. The spool (21) is used for inserting rolled material. The limiting sleeve (22) is detachably connected to the other end of the spool (21) and is used to restrict the rolled material from falling off the spool (21).