An automatic plate flipping device for a flatbed printing press

Abstract

This utility model relates to the field of printing press flipping, and more particularly to an automatic flipping device for a flatbed printing press. It includes a base, with a pair of first upright plates fixed to the top of the base. The pair of first upright plates are symmetrically arranged on both sides of the base. A first motor is mounted in the middle of the side wall of each first upright plate. By setting up a control handle, a reciprocating lead screw, a first movable block, a support rod, and a flipping roller, after single-sided printing of the paper is completed on the flatbed printing press, the paper can be flipped and transported to the next flatbed printing press for reverse printing, directly connecting the front and back printing processes. This improves the continuity and efficiency of double-sided printing. Simultaneously, the adjustable flipping roller design can match printing papers of different sizes and thicknesses. By adjusting the spacing, angle, or position of the flipping roller, the flipping path can be optimized, allowing various types of paper, from small business cards to large sheets, to pass through stably, reducing problems such as paper jams and wrinkles caused by size mismatch.

Description

Technical Field

[0001] This utility model relates to the field of printing press copying, and more particularly to an automatic copying device for a flatbed printing press. Background Technology

[0002] A flatbed printing press is a traditional printing equipment. Its core feature is that both the printing plate and the printing mechanism are planar structures. It transfers ink from the printing plate to the substrate (such as paper) through vertical pressure and is one of the important categories of printing presses.

[0003] For example, the automatic flipping device for a flatbed printing press disclosed in Chinese Patent No. CN215096267U, in which a rodless cylinder is activated to adjust the vertical position of the rotating roller, a servo motor drives the rotating roller to rotate, a vacuum suction cup is activated to face the vertical direction, the rodless cylinder drives the vacuum suction cup to face the paper to adsorb the paper, the servo motor is activated to drive the rotating roller to rotate, and thus flipping the paper, which has the effect of facilitating flipping and reducing manual labor.

[0004] Through long-term use and observation, it was found that during the automatic paper flipping process, a single roller is difficult to handle printing paper of different sizes and thicknesses. Small paper will have its flipping trajectory deviated due to the roller being too large, while large paper will not be able to be completely wrapped due to the roller being too small, resulting in edge flipping failure.

[0005] Therefore, this utility model provides an automatic plate flipping device for a flatbed printing press. Utility Model Content

[0006] This utility model addresses the shortcomings of existing technologies by providing the following technical solution:

[0007] An automatic flipping device for a flatbed printing press includes a base. A pair of first upright plates are fixed to the top of the base, symmetrically arranged on both sides of the base. A first motor is mounted in the middle of the side wall of each first upright plate. A first movable shaft is fixedly connected to the output end of the first motor, rotating on the side wall of the first upright plate. A first synchronous belt is driven through the middle of the side wall of the first movable shaft, and multiple second movable shafts are driven through the middle of the side wall of the first synchronous belt. A second motor is mounted in the middle of the side wall of the first upright plate, located below the first motor. A third movable shaft is fixedly connected to the output end of the second motor, located below the first movable shaft, rotating on the side wall of the first upright plate. A second synchronous belt is driven through the middle of the side wall of the third movable shaft, and multiple fourth movable shafts are driven through the middle of the side wall of the second synchronous belt, located below the second movable shafts. Conveyor rollers are fixed in the middle of the side walls of the first, second, third, and fourth movable shafts. A flipping assembly is provided on the top of the base, a smoothing assembly is provided between the pair of first upright plates, and a drying assembly is provided on the top of the first upright plates. The flipping assembly includes a pair of second upright plates, which are fixed to the top of the base and are fixedly connected to the first upright plate. Multiple slots are formed in the middle of the sidewall of each second upright plate. Multiple control handles are mounted on the top of each second upright plate, with the control handles corresponding to the slots. A reciprocating screw is fixedly connected to the output end of each control handle, and the reciprocating screw rotates inside the slot. A first movable block is slidably connected to the middle of the sidewall of the reciprocating screw. A pair of support rods are fixed to the middle of the sidewall of the first movable block. A flipping roller is rotatably connected between the symmetrically arranged support rods. This step involves... The system, consisting of a control handle, reciprocating lead screw, first movable block, support rod, and flipping roller, allows the paper to be flipped and transported to the next flatbed printing press for reverse printing after single-sided printing on a flatbed printing press. This directly connects the front and back printing processes, improving the continuity and efficiency of double-sided printing. The adjustable flipping roller position can accommodate printing papers of different sizes and thicknesses. By adjusting the spacing, angle, or position of the flipping roller, the flipping path can be optimized, ensuring stable passage for various types of paper, from small business cards to large sheets, reducing problems such as paper jams and wrinkles caused by size mismatches.

[0008] As an improvement to the above technical solution, the smoothing assembly includes a fixing rod, which is fixed between a pair of first vertical plates. The fixing rod is located between a second movable shaft and a fourth movable shaft. A smoothing roller is rotatably connected to the middle of the side wall of the fixing rod. This step of setting the fixing rod and the smoothing roller can restore the surface of the printed paper to flatness through slight pressure or tension adjustment, thereby reducing problems such as "missed printing", "uneven ink color" or poor contact between the printing plate and the paper surface caused by uneven paper surface during subsequent printing.

[0009] As an improvement to the above technical solution, a pair of grooves are provided in the middle of the side wall of the first upright plate. The pair of grooves are respectively arranged corresponding to the second movable shaft and the fourth movable shaft. A limit rod is fixed in the middle of the inner side wall of the groove. A second movable block is slidably connected to the middle of the side wall of the limit rod. A spring is fixed between the second movable block and the first upright plate. A connecting plate is installed in the middle of the side wall of the second movable block. An electric push rod is assembled on the top of the connecting plate. A fixing pad is fixed to the output end of the electric push rod. The slight vibration or drift of the paper during the conveying process can cause uneven ink transfer, resulting in "ghosting", "ink streaks" or color deviation. By fixing the printing paper during the conveying process, the quality of the printed products can be improved, while reducing the risk of paper slippage, allowing the equipment to maintain a constant speed and reducing the equipment load.

[0010] As an improvement to the above technical solution, the drying assembly includes multiple support lamps, which are fixed to the top of the first upright plate. An infrared heating lamp is fixed to the end of the support lamp. By setting up the support lamps and infrared heating lamps, this step can quickly cure the ink on the printing paper, reduce the contact between the paper and the flipping roller or its own back side during the flipping process, and prevent the ink of the printed pattern from being transferred to the back side or the flipping roller, which would cause the back side of the paper to be contaminated, or the flipping roller to be further contaminated by ink, thus reducing cross-contamination.

[0011] As an improvement to the above technical solution, a reflector is installed between the first upright plate and the base. The reflector is made of a smooth material. This step, by setting the reflector, can reflect the light emitted by the infrared heating lamp to the bottom of the printing paper, accelerate the overall curing of the ink, reduce problems such as ink layer peeling and smudging caused by uneven drying, and at the same time shorten the drying time and improve production efficiency.

[0012] As an improvement to the above technical solution, an anti-slip pad is fixed in the middle of the side wall of the control handle. The anti-slip pad is made of elastic material. This step of setting the anti-slip pad can increase the friction between the palm and the control handle through surface texture or elasticity, reduce slippage when rotating, and enable the operator to stably control the rotation direction and force of the handle.

[0013] The beneficial effects of this utility model are:

[0014] 1. By setting up a control handle, reciprocating lead screw, first moving block, support rod and flip roller, after the printing paper is printed on one side of the flatbed printing press, it can be flipped and conveyed to the next flatbed printing press for reverse printing, directly connecting the front and back printing processes, improving the continuity and efficiency of double-sided printing. At the same time, the adjustable flip roller design can match printing paper of different sizes and thicknesses. By adjusting the spacing, angle or position of the flip roller, the flipping path can be optimized, so that all kinds of paper, from small business card paper to large double-sheet paper, can pass through stably, reducing problems such as paper jams and wrinkles caused by size mismatch.

[0015] 2. By setting up a fixing rod and a leveling roller, the surface of the printed paper can be restored to flatness after being flipped through slight pressure or tension adjustment, reducing problems such as "missed printing", "uneven ink color" or poor contact between the printing plate and the paper surface caused by uneven paper surface during subsequent printing. Attached Figure Description

[0016] Figure 1 This is a perspective view of the present utility model;

[0017] Figure 2 This is a schematic diagram of the cooperation structure between the reciprocating lead screw and the conveying roller in this utility model;

[0018] Figure 3 This is a schematic diagram of the cooperative structure of the conveying roller and the leveling roller in this utility model;

[0019] Figure 4 This is a schematic diagram of the cooperative structure of the tilting roller and the support rod in this utility model;

[0020] Figure 5 This is a schematic diagram of the cooperation structure between the fixing pad and the upright plate in this utility model.

[0021] Reference numerals: 1. Base; 11. First upright plate; 12. First motor; 13. First movable shaft; 14. First synchronous belt; 15. Second movable shaft; 16. Second motor; 17. Third movable shaft; 18. Second synchronous belt; 19. Fourth movable shaft; 110. Conveyor roller; 2. Second upright plate; 21. Groove; 22. Control handle; 23. Reciprocating screw; 24. First movable block; 25. Support rod; 26. Tilting roller; 3. Fixed rod; 31. Smoothing roller; 4. Groove; 41. Limiting rod; 42. Second movable block; 43. Spring; 44. Connecting plate; 45. Electric push rod; 46. Fixing pad; 5. Support lamp post; 51. Infrared heating lamp; 6. Reflector; 7. Anti-slip pad. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the following provides a more detailed description of the utility model. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the utility model.

[0023] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, this utility model provides an automatic flipping device for a flatbed printing press, including a base 1. A pair of first upright plates 11 are fixed to the top of the base 1. The pair of first upright plates 11 are symmetrically arranged on both sides of the base 1. A first motor 12 is mounted in the middle of the side wall of the first upright plate 11. A first movable shaft 13 is fixedly connected to the output end of the first motor 12. The first movable shaft 13 rotates on the side wall of the first upright plate 11. A first synchronous belt 14 is driven and connected in the middle of the side wall of the first movable shaft 13. A plurality of second movable shafts 15 are driven and connected in the middle of the side wall of the first synchronous belt 14. A second motor 16 is mounted in the middle of the side wall of the first upright plate 11. The second motor 16 is... Below the first motor 12, a third movable shaft 17 is fixedly connected to the output end of the second motor 16. The third movable shaft 17 is located below the first movable shaft 13 and rotates on the side wall of the first upright plate 11. A second synchronous belt 18 is driven and connected to the middle of the side wall of the third movable shaft 17. Multiple fourth movable shafts 19 are driven and connected to the middle of the side wall of the second synchronous belt 18. The fourth movable shafts 19 are located below the second movable shaft 15. Conveyor rollers 110 are fixed to the middle of the side walls of the first movable shaft 13, the second movable shaft 15, the third movable shaft 17, and the fourth movable shaft 19. A flipping assembly is provided on the top of the base 1. A leveling component is provided, and a drying component is provided on the top of the first upright plate 11. When the operator starts the first motor 12 and the second motor 16, the first motor 12 drives the first movable shaft 13 to rotate. When the first movable shaft 13 rotates, it drives the first synchronous belt 14 to rotate. When the first synchronous belt 14 rotates, it drives multiple second movable shafts 15 to rotate synchronously. Similarly, the second motor 16 drives the third movable shaft 17 to rotate. When the third movable shaft 17 rotates, it drives the second synchronous belt 18 to rotate. When the second synchronous belt 18 rotates, it drives multiple fourth movable shafts 19 to rotate synchronously. At this time, multiple conveyor rollers 110 will rotate on the top of the base 1. When the printed paper after single-sided printing is conveyed to the conveyor rollers 110 on the side walls of the first movable shaft 13 and the second movable shaft 15, it will be moved to the flipping assembly by the conveyor rollers 110. At this time, the drying assembly on the top of the first vertical plate 11 will continue to dry the printed pattern. The operator adjusts the position of the flipping assembly in advance. At this time, the printed paper will be flipped with the assistance of the flipping assembly and moved to the conveyor rollers 110 on the side walls of the third movable shaft 17 and the fourth movable shaft 19. The conveyor rollers 110 will convey the flipped printed paper to the next flatbed printing press. At the same time, the smoothing assembly will smooth out the wrinkles on the flipped printed paper.

[0024] like Figure 1 , Figure 2 and Figure 4As shown, the flipping assembly includes a pair of second upright plates 2, which are fixed to the top of the base 1. The second upright plates 2 and the first upright plate 11 are fixedly connected. Multiple slots 21 are opened in the middle of the side wall of the second upright plate 2. Multiple control handles 22 are mounted on the top of the second upright plate 2. The control handles 22 are correspondingly arranged with the slots 21. A reciprocating screw 23 is fixedly connected to the output end of the control handle 22. The reciprocating screw 23 rotates inside the slot 21. A first movable block 24 is slidably connected to the middle of the side wall of the reciprocating screw 23. A pair of support rods 25 are fixed to the middle of the side wall of the first movable block 24. A flipping roller 26 is rotatably connected between the symmetrically arranged support rods 25. When the operator rotates the multiple control handles 22, the rotation of the control handles 22 will drive the reciprocating screw 23 to rotate inside the slot 21. When the reciprocating screw 23 rotates, it will drive the first movable block 24 to slide along its side wall. Block 24 drives the support rod 25 and the flipping roller 26 to move synchronously. By adjusting the position of multiple flipping rollers 26, the operator can make the printing paper slide along its side wall to the top of the lower conveyor roller 110 and complete the flipping. This step, through the setting of control handle 22, reciprocating lead screw 23, first movable block 24, support rod 25 and flipping roller 26, can flip the printing paper after it has been printed on one side of the flatbed printing press and transport it to the next flatbed printing press for reverse printing, directly connecting the front and back printing processes, improving the continuity and efficiency of double-sided printing. At the same time, the design of adjustable flipping roller 26 position can match printing paper of different sizes and thicknesses. By adjusting the spacing, angle or position of flipping roller 26, the flipping path can be optimized, so that various types of paper, from small business cards to large double sheets, can pass through stably, reducing problems such as paper jams and wrinkles caused by size mismatch.

[0025] like Figure 3 As shown, the smoothing assembly includes a fixing rod 3, which is fixed between a pair of first vertical plates 11. The fixing rod 3 is located between the second movable shaft 15 and the fourth movable shaft 19. A smoothing roller 31 is rotatably connected to the middle of the side wall of the fixing rod 3. The flipped printing paper will move onto the conveyor roller 110 on the side wall of the third movable shaft 17 and the fourth movable shaft 19, and will be driven to move by the conveyor roller 110. The moving printing paper will come into contact with the smoothing roller 31. At this time, the smoothing roller 31 will roll along its surface and smooth its surface during the rolling process. This step of setting the fixing rod 3 and the smoothing roller 31 can restore the surface of the flipped printing paper to flatness by slight pressure or tension adjustment, reducing the problems of "missed printing", "uneven ink color" or poor contact between the printing plate and the paper surface caused by uneven paper surface during subsequent printing.

[0026] like Figure 1 , Figure 2 , Figure 3 and Figure 5As shown, a pair of grooves 4 are provided in the middle of the side wall of the first upright plate 11. The pair of grooves 4 are respectively provided corresponding to the second movable shaft 15 and the fourth movable shaft 19. A limit rod 41 is fixed in the middle of the inner side wall of the groove 4. A second movable block 42 is slidably connected to the middle of the side wall of the limit rod 41. A spring 43 is fixed between the second movable block 42 and the first upright plate 11. A connecting plate 44 is installed in the middle of the side wall of the second movable block 42. An electric push rod 45 is assembled on the top of the connecting plate 44. A fixing pad 46 is fixedly connected to the output end of the electric push rod 45. When the printing paper is moved by the conveyor roller 110, the operator starts the electric push rod 45, which pushes the fixing pad 46 downward. At this time, the fixing pad 46 will press down. Pressed against the paper surface, the paper causes the fixing pad 46, electric push rod 45, connecting plate 44, and second movable block 42 to move synchronously. At this time, the second movable block 42 will slide along the limit rod 41. When the paper is flipped, the electric push rod 45 is activated again, causing the fixing pad 46 to release its fixing effect on the paper. At the same time, the second movable block 42 returns to its original position under the pull of the spring 43. The slight vibration or drift of the paper during the conveying process can cause uneven ink transfer, resulting in "ghosting", "ink streaks", or color deviation. By fixing the printing paper during the conveying process, the quality of the printed products can be improved, while reducing the risk of paper slippage, allowing the equipment to maintain a constant speed and reducing the load on the equipment.

[0027] like Figures 1 to 3 As shown, the drying assembly includes multiple support lamp posts 5, which are fixed to the top of the first upright plate 11. Infrared heating lamps 51 are fixed to the ends of the support lamp posts 5. When the operator turns on the multiple infrared heating lamps 51, the infrared heating lamps 51 will continuously dry the printing paper on the top of the conveyor roller 110, so that the printed pattern on its surface can be cured quickly. This step, by setting up the support lamp posts 5 and the infrared heating lamps 51, can quickly cure the ink on the printing paper, reduce the contact between the paper and the flipping roller 26 or its own back side during the flipping process, and reduce the transfer of ink of the printed pattern to the back side or the flipping roller 26, which would cause the back side of the paper to be contaminated, or the flipping roller 26 to be further contaminated by ink after being dipped in ink, thus reducing the situation of cross-contamination.

[0028] like Figure 1 , Figure 3 and Figure 5 As shown, a reflector 6 is installed between the first upright plate 11 and the base 1. The reflector 6 is made of a smooth material. By setting the reflector 6, the light emitted by the infrared heating lamp 51 can be reflected to the bottom of the printing paper, which can accelerate the overall curing of the ink, reduce problems such as ink layer peeling and smudging caused by uneven drying, and shorten the drying time and improve production efficiency.

[0029] like Figure 1 , Figure 2 and Figure 4As shown, an anti-slip pad 7 is fixed in the middle of the side wall of the control handle 22. The anti-slip pad 7 is made of elastic material. This step of setting the anti-slip pad 7 can increase the friction between the palm and the control handle 22 through surface texture or elasticity, reduce slippage when rotating, and enable the operator to stably control the rotation direction and force of the handle 22.

[0030] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. An automatic plate-turning device for a flatbed printing press, comprising a base (1), characterized in that: A pair of first upright plates (11) are fixed to the top of the base (1). The pair of first upright plates (11) are symmetrically arranged on both sides of the base (1). A first motor (12) is assembled in the middle of the side wall of the first upright plate (11). A first movable shaft (13) is fixedly connected to the output end of the first motor (12). The first movable shaft (13) rotates on the side wall of the first upright plate (11). A first synchronous belt (14) is driven to the middle of the side wall of the first movable shaft (13). A plurality of second movable shafts (15) are driven to the middle of the side wall of the first synchronous belt (14). A second motor (16) is assembled in the middle of the side wall of the first upright plate (11). The second motor (16) is located below the first motor (12). A third movable shaft is fixedly connected to the output end of the second motor (16). Shaft (17), the third movable shaft (17) is located below the first movable shaft (13), the third movable shaft (17) rotates on the side wall of the first upright plate (11), the middle of the side wall of the third movable shaft (17) is connected to a second synchronous belt (18), the middle of the side wall of the second synchronous belt (18) is connected to multiple fourth movable shafts (19), the fourth movable shaft (19) is located below the second movable shaft (15), the middle of the side walls of the first movable shaft (13), the second movable shaft (15), the third movable shaft (17) and the fourth movable shaft (19) are all fixed with conveyor rollers (110), the top of the base (1) is provided with a flipping assembly, a smoothing assembly is provided between a pair of first upright plates (11), and a drying assembly is provided on the top of the first upright plate (11).

2. The automatic plate turning device of a planographic printing press according to claim 1, wherein: The flipping assembly includes a pair of second upright plates (2), which are fixed to the top of the base (1). The second upright plate (2) and the first upright plate (11) are fixedly connected. The second upright plate (2) has multiple slots (21) in the middle of its side wall. The second upright plate (2) is equipped with multiple control handles (22) on its top. The control handles (22) and slots (21) are correspondingly arranged. The output end of the control handle (22) is fixedly connected to a reciprocating screw (23). The reciprocating screw (23) rotates inside the slot (21). The middle of the side wall of the reciprocating screw (23) is slidably connected to a first movable block (24). The middle of the side wall of the first movable block (24) is fixed with a pair of support rods (25). The symmetrically arranged support rods (25) are rotatably connected to a flipping roller (26).

3. The automatic plate turning device of a planographic printing press according to claim 1, wherein: The smoothing assembly includes a fixing rod (3), which is fixed between a pair of first upright plates (11). The fixing rod (3) is located between a second movable shaft (15) and a fourth movable shaft (19). A smoothing roller (31) is rotatably connected to the middle of the side wall of the fixing rod (3).

4. The automatic plate turning device of a planographic printing press according to claim 1, wherein: A pair of grooves (4) are provided in the middle of the side wall of the first upright plate (11). The pair of grooves (4) are respectively provided in correspondence with the second movable shaft (15) and the fourth movable shaft (19). A limit rod (41) is fixed in the middle of the inner side wall of the groove (4). A second movable block (42) is slidably connected in the middle of the side wall of the limit rod (41). A spring (43) is fixed between the second movable block (42) and the first upright plate (11). A connecting plate (44) is installed in the middle of the side wall of the second movable block (42). An electric push rod (45) is assembled on the top of the connecting plate (44). A fixing pad (46) is fixedly connected to the output end of the electric push rod (45).

5. The automatic page turning device of a planographic printing press according to claim 1, wherein: The drying assembly includes multiple support lamp posts (5), which are fixed to the top of the first upright plate (11), and infrared heating lamps (51) are fixed to the ends of the support lamp posts (5).

6. The automatic plate turning device of claim 5, wherein: A reflector (6) is installed between the first upright plate (11) and the base (1), and the reflector (6) is made of a smooth material.

7. An automatic plate-turning device for a flatbed printing press according to claim 2, characterized in that: An anti-slip pad (7) is fixed in the middle of the side wall of the control handle (22), and the anti-slip pad (7) is made of elastic material.

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