Paper pad flat loading device for a printing press

Abstract

This application relates to a paper leveling and feeding device for a printing press, belonging to the technical field of printing and printing. It includes a machine body and a feeding platform for placing printing paper. The feeding platform is located inside the machine body, with one side of the machine body designated as the feeding end. A mounting plate is positioned above the feeding platform and is fixedly connected to the top wall of the machine body. A first suction cup and a second suction cup are positioned between the mounting plate and the feeding platform. A cylinder is fixed between the first suction cup and the mounting plate. The second suction cup is located on the side of the first suction cup near the feeding end. A moving block is positioned between the second suction cup and the mounting plate, reciprocating in the direction of feeding. A moving device is positioned between the mounting plate and the feeding platform to drive the moving block. Two guide rollers are positioned on the side of the machine body near the feeding end, rotating in opposite directions. A driving device is positioned on one side of the two guide rollers to drive their rotation. This application has the effect of improving the quality of printed products.

Description

Technical Field

[0001] This application relates to the technical field of printing, and in particular to a paper leveling and feeding device for a printing press. Background Technology

[0002] A printing press is a machine for printing text and images. Modern printing presses generally consist of mechanisms for plate mounting, inking, printing, and paper feeding (including folding). Their 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.

[0003] The existing printing press includes a machine body and a placement platform. Paper is placed on the placement platform, and guide rollers are rotatably mounted above the placement platform. One side of the machine body is the discharge end. The paper is driven away from the placement platform and discharged from the discharge end of the machine body by the friction between the guide rollers and the paper.

[0004] Regarding the aforementioned technologies, the inventors believe that during the feeding process of the printing press, because there is friction between the sheets of paper, it is easy to cause multiple sheets of paper to be ejected at the same time or to cause the paper to wrinkle, which in turn leads to defects in the quality of printed products. Summary of the Invention

[0005] In order to improve the quality of printed products, this application provides a paper leveling and feeding device for a printing press.

[0006] The paper leveling and feeding device for a printing press provided in this application adopts the following technical solution:

[0007] A paper leveling and feeding device for a printing press includes a machine body and a placing platform for placing printing paper. The placing platform is located inside the machine body, and one side of the machine body is designated as the feeding end. An mounting plate is provided above the placing platform and is fixedly connected to the top wall of the machine body. A first suction cup and a second suction cup are provided between the mounting plate and the placing platform. A cylinder is fixed between the first suction cup and the mounting plate. The second suction cup is located on the side of the first suction cup near the feeding end. A moving block is provided between the second suction cup and the mounting plate. The moving block reciprocates in the direction of feeding. A moving device is provided between the mounting plate and the placing platform to drive the moving block to move. Two paper guide rollers are provided on the side of the machine body near the feeding end. The two paper guide rollers rotate in opposite directions. A driving device is provided on one side of the two paper guide rollers to drive the paper guide rollers to rotate.

[0008] By adopting the above technical solution, when paper needs to be exported from the feeding end, the cylinder first drives the first suction cup to move downward, so that the first suction cup adsorbs the paper, and then lifts the paper upward. Then the second suction cup adsorbs the paper, the first suction cup separates from the paper, and the moving block drives the paper to move in the direction of the guide roller, so that the paper moves between the two guide rollers. The driving device drives the two guide rollers to rotate, so that the guide rollers export the paper from the feeding end. Through the above structure, since the first suction cup can only adsorb one sheet of paper at a time, and the guide rollers also flatten the paper, the flatness of the paper is improved, thereby achieving the effect of improving the quality of printed products.

[0009] Optionally, the moving device includes a first motor and a cam. The body of the first motor is fixedly connected to the lower surface of the mounting plate. The output shaft of the first motor is fixedly connected to a connecting shaft. The connecting shaft passes through the cam and is fixedly connected to the cam. A fixing plate is provided on the side of the moving block away from the first motor. The fixing plate is fixedly connected to the mounting plate. A compression spring is provided between the fixing plate and the moving block.

[0010] By adopting the above technical solution, the first motor drives the connecting shaft to rotate, and the connecting shaft then drives the cam to rotate. The movement of the moving block is achieved by the contact between the cam and the moving block.

[0011] Optionally, the driving device includes a second motor and friction wheels; there are two friction wheels, which are located at the same end of the two guide rollers and are respectively fixedly connected to the ends of the two guide rollers, and the second motor is connected to any one of the friction wheels.

[0012] By adopting the above technical solution, the second motor drives the friction wheel to rotate, and through the friction between the two friction wheels, the two friction wheels rotate in opposite directions, thereby driving the two paper guide rollers to rotate in opposite directions.

[0013] Optionally, the machine body has a guide groove in the vertical direction on the side wall at the end of the paper guide roller, and a guide block is rotatably connected to the end of the paper guide roller, and the guide block slides in the guide groove; a pushing component is provided between the paper guide roller and the first motor for pushing the two paper guide rollers away from each other, and a return component is provided between the two paper guide rollers for driving the two paper guide rollers closer to each other.

[0014] By adopting the above technical solution, when the second suction cup moves the paper between the two guide rollers, the pushing component moves the two guide rollers away from each other to place the paper between the two guide rollers; after the paper is placed between the two guide rollers, the return component moves the two guide rollers towards each other and ejects the paper from the machine body.

[0015] Optionally, the pushing assembly includes a first hinge rod and a second hinge rod. There are two first hinge rods, one end of which is hinged to two guide blocks respectively. Both first hinge rods are inclined and gradually approach each other in the direction toward the first motor. The second hinge rod is located at one end of the two first hinge rods that are close to each other. The two first hinge rods and the second hinge rod are hinged to each other. The second hinge rod reciprocates in the horizontal direction. A translation mechanism for driving the second hinge rod to move is provided between the first motor and the second hinge rod.

[0016] By adopting the above technical solution, when the moving block moves toward the guide roller, the moving block drives the second hinge rod to move toward the guide roller, and the second hinge rod then drives the first hinge rod to move. Under the constraint of the guide groove on the guide block, the two guide rollers move away from each other.

[0017] Optionally, the translation mechanism includes a first gear and a second gear, a connecting shaft passing through the first gear and fixedly connected to the first gear, the second gear being located on the side of the first gear near the second hinge rod, and the first gear meshing with the second gear, a third hinge rod being hinged between the end face of the second gear and the second hinge rod, and the hinge point between the third hinge rod and the second gear not being located at the center of the second gear.

[0018] By adopting the above technical solution, the first motor drives the first gear to rotate, the first gear then drives the second gear to rotate, and the second gear drives the third hinge rod to move, thereby achieving the effect of driving the second hinge rod to translate.

[0019] Optionally, the return assembly includes a return plate and a return spring. Two return plates and two return springs are provided between each other. The two return plates are located on opposite sides of the two guide blocks. The return plates are fixedly connected to the inner wall of the machine body. The two ends of the return springs are fixedly connected to the return plates and the guide blocks, respectively.

[0020] By adopting the above technical solution, when the two guide rollers move away from each other, the return spring is in a compressed state; when the moving block moves away from the guide rollers, the compressed spring releases its elastic force, driving the two guide rollers to move towards each other, and causing the first hinge rod and the second hinge rod to return to their original positions, while increasing the friction between the guide rollers and the paper.

[0021] Optionally, air nozzles are fixed on both sides of the placement platform, and a blower is fixed on the side of the placement platform away from the paper guide roller. An air guide pipe is connected between the blower and the air nozzles. The air nozzles are located between the first suction cup and the second suction cup, and the air nozzles blow air upwards at an angle towards the second suction cup.

[0022] By adopting the above technical solution, when the first suction cup picks up the paper, the blower nozzle blows out an appropriate amount of air so that the paper floats at a suitable height so that the second suction cup can pick up the paper after the first suction cup leaves.

[0023] Optionally, the second hinge rod is fitted with a guide sleeve, which is fixedly connected to the machine body.

[0024] By adopting the above technical solution, the guide sleeve guides the movement of the second hinge rod, enabling the second hinge rod to move smoothly in the horizontal direction.

[0025] Optionally, a hydraulic cylinder is fixed to the bottom of the placement platform.

[0026] By adopting the above technical solution, the paper can be transported to a suitable height by the hydraulic cylinder so that the first suction cup can adhere to the paper.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. The first suction cup can pick up the paper, and the second suction cup can transport the paper between the two guide rollers;

[0029] 2. When the paper is transported between the two guide rollers, the pushing component can drive the two guide rollers away from each other, so that the second suction cup can place the paper between the two guide rollers;

[0030] 3. When the second suction cup moves away from the paper guide roller, the return assembly drives the two paper guide rollers to move closer to each other so that the paper can be exported from the machine body. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a paper leveling and feeding device for a printing press according to an embodiment of this application;

[0032] Figure 2 This is a structural diagram illustrating the internal structure of the organism in the embodiments of this application;

[0033] Figure 3 yes Figure 2 A magnified view of part A in the middle;

[0034] Figure 4 This is a partial cross-sectional view of the drive device structure in the embodiments of this application.

[0035] In the diagram, 1. Machine body; 11. Placement platform; 111. Hydraulic cylinder; 12. Feeding end; 13. Guide groove; 14. Air nozzle; 15. Blower; 16. Air duct; 2. Mounting plate; 21. First suction cup; 211. Cylinder; 22. Second suction cup; 221. Moving block; 3. Moving device; 31. First motor; 32. Cam; 33. Connecting shaft; 34. Fixing plate; 35. Compression spring; 4. Guide roller; 41. Drive device; 411. Second motor; 412. Friction wheel; 42. Guide block; 5. Pushing assembly; 51. First hinge rod; 52. Second hinge rod; 521. Guide sleeve; 6. Translation mechanism; 61. First gear; 62. Second gear; 63. Third hinge rod; 7. Return assembly; 71. Return plate; 72. Return spring. Detailed Implementation

[0036] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail.

[0037] This application discloses a paper leveling and feeding device for a printing press.

[0038] refer to Figure 1 A paper leveling and feeding device for a printing press includes a body 1. The body 1 has a paper placement platform 11 inside for placing paper. A hydraulic cylinder 111 for driving the paper placement platform 11 to rise and fall is fixed below the paper placement platform 11. One side of the paper placement platform 11 is a feeding end 12, and the paper is discharged from the feeding end 12 of the body 1.

[0039] Reference Figure 1 and Figure 2 A mounting plate 2 is fixedly installed directly above the placement platform 11. A first suction cup 21 and a second suction cup 22 are arranged between the mounting plate 2 and the placement platform 11. The second suction cup 22 is located on the side of the first suction cup 21 near the feeding end 12. A cylinder 211 is fixedly connected between the first suction cup 21 and the mounting plate 2. A moving block 221 is arranged between the second suction cup 22 and the mounting plate 2. The moving block 221 reciprocates between the feeding end 12 and the cylinder 211. Two paper guide rollers 4 are provided at the feeding end 12 of the machine body 1. The rotation axes of the two paper guide rollers 4 are both arranged in the horizontal direction, and the two paper guide rollers 4 are arranged in the vertical direction. Air nozzles 14 are provided on both sides of the placement platform 11. A blower 15 is fixedly installed on the side of the placement platform 11 near the first suction cup 21. An air guide pipe 16 is connected between the blower 15 and the air nozzles 14. The air nozzles 14 blow air upwards at an angle towards the second suction cup 22.

[0040] When the machine body 1 needs to export the paper, the paper is first placed on the placement platform 11. After the hydraulic cylinder 111 drives the placement platform 11 to rise to a suitable height, the cylinder 211 drives the first suction cup 21 to pick up the paper at the top. The blower 15 delivers air through the air duct 16 to the air nozzle 14, and then the air nozzle 14 blows the air upward at an angle, so that the paper is in a stable floating state. The second suction cup 22 then picks up the paper. At this time, the first suction cup 21 separates from the paper. The moving block 221 then drives the paper to move between the two guide rollers 4 through the second suction cup 22. Then the second suction cup 22 separates from the paper, and the guide rollers 4 export the paper from the machine body 1.

[0041] Reference Figure 2 A moving device 3 for moving the moving block 221 is provided on the lower surface of the mounting plate 2. The moving device 3 includes a first motor 31, a cam 32, and a connecting shaft 33. The body of the first motor 31 is fixedly connected to the mounting plate 2, and the connecting shaft 33 is fixedly connected to the output shaft of the first motor 31. The connecting shaft 33 passes through the cam 32 and is fixedly connected to the cam 32. The cam 32 is located between the moving block 221 and the cylinder 211 and abuts against the side wall of the moving block 221.

[0042] The moving device 3 also includes a fixed plate 34 and a compression spring 35. The fixed plate 34 is located between the moving block 221 and the paper guide roller 4. The top of the fixed plate 34 is fixedly connected to the lower surface of the mounting plate 2, and the compression spring 35 is fixedly connected between the fixed plate 34 and the moving block 221.

[0043] The first motor 31 drives the connecting shaft 33 to rotate, and the connecting shaft 33 then drives the cam 32 to rotate. Under the action of the cam 32 and the compression spring 35, the moving block 221 reciprocates between the paper guide roller 4 and the cylinder 211, thereby realizing the paper handling work.

[0044] Reference Figure 4 One end of each of the two guide rollers 4 is equipped with a drive device 41 for driving the two guide rollers 4 to rotate in opposite directions. The drive device 41 includes a second motor 411 and two friction wheels 412. The two friction wheels 412 are rotatably connected to the ends of the two guide rollers 4 respectively, and the two friction wheels 412 abut against each other. The machine body 1 has a slide groove in the vertical direction. The body of the second motor 411 is located in the slide groove and is slidably connected to the machine body 1 in the vertical direction. The output shaft of the second motor 411 is fixedly connected to any one of the friction wheels 412. The second motor 411 drives one of the friction wheels 412 to rotate, and the two friction wheels 412 achieve the effect of rotating in opposite directions through friction, thereby achieving the effect of driving the two guide rollers 4 to rotate in opposite directions.

[0045] Reference Figure 3 and Figure 4Guide blocks 42 are provided at both ends of the paper guide roller 4. One guide block 42 is rotatably connected to one end of the paper guide roller 4, and the other guide block 42 is rotatably connected to the end of the friction wheel 412 away from the paper guide roller 4. The output shaft of the second motor 411 passes through the guide block 42. A guide groove 13 is provided on the inner wall of the machine body 1 along the vertical direction. The guide block 42 slides in the guide groove 13. A pushing component 5 is provided between the paper guide roller 4 and the first motor 31 to make the two paper guide rollers 4 move away from each other. A return component 7 is provided between the two paper guide rollers 4 to drive the two paper guide rollers 4 to move closer to each other.

[0046] Two sets of pushing components 5 are provided, located at both ends of the paper guide roller 4. Each set of pushing components 5 includes two first hinge rods 51 and one second hinge rod 52. The two first hinge rods 51 are respectively hinged to the opposite side of the two guide blocks 42. The two first hinge rods 51 are inclined and their other ends are close to each other. The close ends of the two first hinge rods 51 are hinged to one end of the second hinge rod 52. The second hinge rod 52 moves in the horizontal direction. A guide sleeve 521 is provided on the second hinge rod 52. The guide sleeve 521 is fixedly connected to the machine body 1. A translation mechanism 6 is provided between the end of the second hinge rod 52 away from the first hinge rod 51 and the first motor 31 for driving the second hinge rod 52 to move.

[0047] Reference Figure 2 and Figure 3 The translation mechanism 6 is provided in two sets, and the two sets of translation mechanisms 6 correspond one-to-one with the two sets of push components 5. The translation mechanism 6 includes a first gear 61, a second gear 62 and a third hinge rod 63. The connecting shaft 33 passes through the first gear 61 and is fixedly connected to the first gear 61. The first gear 61 meshes with the second gear 62. One end of the third hinge rod 63 is hinged to the end of the second hinge rod 62 away from the first hinge rod 51, and the other end of the third hinge rod 63 is hinged to the end face of the second gear 62. The hinge point between the third hinge rod 63 and the second gear 62 is not located at the center of the second gear 62.

[0048] When the first motor 31 drives the connecting shaft 33 to rotate, the connecting shaft 33 drives the first gear 61 to rotate, the first gear 61 then drives the second gear 62 to rotate, the second gear 62 drives the third hinge rod 63 to move, the third hinge rod 63 then drives the second hinge rod 52 to translate, and the second hinge rod 52 drives the two first hinge rods 51 to move, thereby realizing that the two guide rollers 4 move away from each other.

[0049] The return assembly 7 includes a return plate 71 and a return spring 72. The return plate 71 is located on the side where the two guide blocks 42 are opposite to each other. The return plate 71 is fixedly connected to the inner wall of the machine body 1. The return spring 72 is fixedly connected between the return plate 71 and the guide blocks 42. When the two guide blocks 42 are far apart, the return spring 72 is in a compressed state. When the two guide rollers are close together, the return spring 72 releases its elastic force, causing the two guide blocks 42 to move closer together and increasing the friction between the two paper guide rollers 4 and the paper.

[0050] The implementation principle of a paper leveling and feeding device for a printing press according to an embodiment of this application is as follows: When paper needs to be discharged from the machine body 1, the placement platform 11 is adjusted to a suitable height by the hydraulic cylinder 111. Then, the cylinder 211 drives the first suction cup 21 to pick up the paper, and the air nozzle 14 makes the paper float. Then, the second suction cup 22 picks up the paper, the first suction cup 21 separates from the paper, and the first suction cup 21 transports the paper between the two guide rollers 4. The pushing component 5 first moves the two guide rollers 4 away from each other. After the paper moves between the two guide rollers 4, the second suction cup 22 separates from the paper, and the return component 7 moves the two guide rollers 4 closer together and discharges the paper from between the two guide rollers 4. With the above structure, it is less likely to cause multiple sheets of paper to be discharged at the same time or to cause paper wrinkling, thereby improving the printing quality of the paper.

[0051] The embodiments described in this specific implementation are 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. A paper leveling and feeding device for a printing press, comprising a machine body (1) and a placing platform (11) for placing printing paper, the placing platform (11) being located inside the machine body (1), and one side of the machine body (1) being configured as a feeding end (12), characterized in that: A mounting plate (2) is provided above the placement platform (11). The mounting plate (2) is fixedly connected to the inner top wall of the machine body (1). A first suction cup (21) and a second suction cup (22) are provided between the mounting plate (2) and the placement platform (11). A cylinder (211) is fixed between the first suction cup (21) and the mounting plate (2). The second suction cup (22) is located on the side of the first suction cup (21) near the feeding end (12). A cylinder (211) is provided between the second suction cup (22) and the mounting plate (2). A movable block (221) is provided, which moves back and forth along the direction of the feeding end (12). A moving device (3) for driving the movable block (221) is provided between the mounting plate (2) and the placement platform (11). Two paper guide rollers (4) are provided on the side of the machine body (1) near the feeding end (12). The two paper guide rollers (4) rotate in opposite directions. A driving device (41) for driving the paper guide rollers (4) to rotate is provided on one side of the two paper guide rollers (4). Air nozzles (14) are fixed on both sides of the placement platform (11). A blower (15) is fixed on the side of the placement platform (11) away from the guide roller (4). An air guide pipe (16) is connected between the blower (15) and the air nozzles (14). The air nozzles (14) are located between the first suction cup (21) and the second suction cup (22). The air nozzles (14) blow air upwards at an angle toward the second suction cup (22). The cylinder (211) drives the first suction cup (21) to pick up the paper, and then the paper is made to float by the blower (14). The second suction cup (22) then adsorbs the paper, and the first suction cup (21) separates from the paper. The moving device (3) includes a first motor (31) and a cam (32). The body of the first motor (31) is fixedly connected to the lower surface of the mounting plate (2). The output shaft of the first motor (31) is fixedly connected to a connecting shaft (33). The connecting shaft (33) passes through the cam (32) and is fixedly connected to the cam (32). A fixing plate (34) is provided on the side of the moving block (221) away from the first motor (31). The fixing plate (34) is fixedly connected to the mounting plate (2). A compression spring (35) is provided between the fixing plate (34) and the moving block (221). The driving device (41) includes a second motor (411) and a friction wheel (412); there are two friction wheels (412), which are located at the same end of the two guide rollers (4) and are respectively fixedly connected to the ends of the two guide rollers (4); the second motor (411) is connected to any one of the friction wheels (412); The machine body (1) has a guide groove (13) vertically opened on the side wall of the end of the guide roller (4). The end of the guide roller (4) is rotatably connected to a guide block (42), which slides in the guide groove (13). A pushing component (5) for pushing the two guide rollers (4) away from each other is provided between the guide roller (4) and the first motor (31). A return component (7) for driving the two guide rollers (4) to move closer to each other is provided between the two guide rollers (4). The pushing component (5) includes a first hinge rod (51) and a second hinge rod (52). There are two first hinge rods (51). One end of each first hinge rod (51) is hinged to a guide block (42). Both first hinge rods (51) are inclined. The two first hinge rods (51) gradually approach each other in the direction toward the first motor (31). The second hinge rod (52) is located at one end of the two first hinge rods (51) that are close to each other. The two first hinge rods (51) and the second hinge rod (52) are hinged to each other. The second hinge rod (52) moves back and forth in the horizontal direction. A translation mechanism (6) for driving the second hinge rod (52) to move is provided between the first motor (31) and the second hinge rod (52). The translation mechanism (6) includes a first gear (61) and a second gear (62). A connecting shaft (33) passes through the first gear (61) and is fixedly connected to the first gear (61). The second gear (62) is located on the side of the first gear (61) near the second hinge rod (52), and the first gear (61) meshes with the second gear (62). A third hinge rod (63) is hinged between the end face of the second gear (62) and the second hinge rod (52). The hinge point between the third hinge rod (63) and the second gear (62) is not located at the center of the second gear (62). The return assembly (7) includes a return plate (71) and a return spring (72). There are two return plates (71) and two return springs (72). The two return plates (71) are located on opposite sides of the two guide blocks (42). The return plates (71) are fixedly connected to the inner wall of the body (1). The two ends of the return springs (72) are fixedly connected to the return plates (71) and the guide blocks (42) respectively.

2. The paper leveling and feeding device for a printing press according to claim 1, characterized in that: The second hinge rod (52) is fitted with a guide sleeve (521), and the guide sleeve (521) is fixedly connected to the body (1).

3. The paper leveling and feeding device for a printing press according to claim 1, characterized in that: A hydraulic cylinder (111) is fixed to the bottom of the placement platform (11).

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