Paper supply mechanism of printing machine

Abstract

The utility model discloses a paper feeding mechanism of a printing machine, which belongs to the technical field of printing machines and comprises a paper storage box, a paper grabbing structure is arranged on one side of the paper storage box and comprises an air cylinder and a portal frame, the air cylinder is fixedly mounted on one side of the bottom of the paper storage box, and a rotating seat is fixedly mounted at the telescopic end of the air cylinder. The bottom of the portal frame is rotatably mounted on a rotating seat, and a plurality of suction heads for sucking paper are fixedly mounted on the portal frame; by arranging the multiple sets of suction heads, the device is simple in structure, convenient to use and practical, only the first piece of paper on the uppermost portion can be sucked stably each time, the device is used in cooperation with the air cylinder, in the paper lifting process, the paper sucked below the first piece of paper falls automatically, conveying of multiple pieces of paper is further avoided, and the paper conveying efficiency is improved through cooperation with the paper conveying structure and the paper pressing structure. The paper supply efficiency is improved, and the error rate of paper supply is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of printing machines, in particular to a paper supply mechanism of a printing machine. Background Art

[0002] A printing press is a machine for printing text and images. Its working principle is: first the text and image to be printed are made into a printing plate and installed on a printing press. Then, ink is applied to the places with text and images on the printing plate by humans or a printing press. Then, the ink is directly or indirectly transferred to paper or other substrates, thereby reproducing printed products identical to the printing plate. The invention and development of the printing press have played an important role in the spread of human civilization and culture. Modern printing presses are generally composed of mechanisms such as plate mounting, inking, embossing, and paper feeding. In order to ensure the smooth progress of printing, correct paper feeding is particularly important.

[0003] After searching, in the prior art, Chinese patent publication number: CN217867299U discloses a detachable paper feeding mechanism of a printing press, including a conveying box, a flattening mechanism is arranged on the upper side of the conveying box, the flattening mechanism includes a flattening plate fixed on the conveying box by screws, a down-pressing electric rod fixed on the middle of the flattening plate, a down-pressing frame fixed on the piston rod at the lower end of the down-pressing electric rod, a middle pressure roller rotatably installed in the middle of the down-pressing frame by a bearing, and a guide rod fixed at both ends of the down-pressing frame, the upper end of the guide rod is slidably connected to the flattening plate through a sliding hole, a spring is fixedly connected inside the two sides of the down-pressing frame, a sliding plate is fixedly connected to the lower end of the spring, and the lower end of the sliding plate is rotatably connected to the down-pressing roller through a bearing; through the designed flattening mechanism, when in use, the middle pressure roller and the down pressure roller of the flattening mechanism are pressed on the paper for flattening, and when pressing down, the elastic force of the spring makes the down pressure roller first press on the paper, and then flattened by the middle pressure roller, and the flattening mechanism is convenient and quick to remove and replace.

[0004] But this device still has the following defects:

[0005] During the paper feeding process, multiple sheets of paper may be fed at one time. Multiple sheets of paper entering the printing machine at the same time may cause printing errors, bring unnecessary trouble to the operator, and may even block the printing machine and cause damage to the printing machine. The device does not solve this problem well. Utility Model Content

[0006] The utility model aims to provide a paper feeding mechanism of a printing press, which can only stably suck the first sheet of paper at the top each time by setting multiple groups of suction heads, and cooperate with a cylinder to automatically drop the paper adsorbed under the first sheet of paper during the process of lifting the paper, further avoiding the conveying of multiple sheets of paper, and cooperates with a paper feeding structure and a paper pressing structure to improve the paper feeding efficiency and reduce the error rate of paper feeding, so as to solve the problems raised in the above-mentioned background technology.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A paper feeding mechanism of a printing press comprises a paper storage box, one side of the paper storage box is provided with a paper grabbing structure, the paper grabbing structure comprises a cylinder and a gantry, the cylinder is fixedly installed on one side of the bottom of the paper storage box, the telescopic end of the cylinder is fixedly installed with a rotating seat, the bottom of the gantry is rotatably installed on the rotating seat, a plurality of suction heads for sucking paper are fixedly installed on the gantry, the suction heads are connected to an air pump through pipes and connecting hoses inside the gantry, the air pump is fixedly installed on one side of the paper storage box, limiting blocks are fixedly connected to both sides of the top of the gantry, the limiting blocks are matched with the sliding clearance of the limiting groove, the limiting groove is fixedly installed on the inner end of the mounting plate, and a paper feeding structure is provided at the top end of the paper storage box.

[0009] Preferably, the paper feeding structure comprises a paper feeding platform, which is fixedly mounted on one side of the top of the paper storage box, and a plurality of notches are formed on one side of the surface of the paper feeding platform, in which paper feeding wheels are arranged.

[0010] Preferably, the paper feed wheel is fixedly mounted on the first rotating shaft, the first rotating shaft is rotatably mounted on the fixed plate, the fixed plate is fixedly mounted on one end of the bottom of the paper feed platform, one end of the first rotating shaft is transmission-matched with the output end of the first motor, and the first motor is fixedly mounted on the outside of the fixed plate.

[0011] Preferably, mounting plates are fixedly installed on both sides of the paper feeding platform, and a paper pressing structure is arranged in the middle of the inner side of the mounting plate. The paper pressing structure includes a paper pressing wheel. The paper pressing wheel is arranged in several groups and fixedly installed on the second rotating shaft. The paper pressing wheel is rotatably installed in the middle of the inner side of the mounting plate via the second rotating shaft.

[0012] Preferably, one end of the second rotating shaft is drivingly connected to the output end of the second motor, and the second motor is fixedly mounted on the outer side of the mounting plate.

[0013] Preferably, a driving pulley is fixedly mounted on the other end of the second rotating shaft, the driving pulley is arranged on the outside of another mounting plate, and the driving pulley is connected to the driven pulley through a belt.

[0014] Preferably, the driven pulley is fixedly connected to another set of paper pressing structures, and the paper pressing structures are rotatably mounted on the other inner end of the mounting plate.

[0015] Preferably, a paper placing platform is fixedly installed at the bottom center of the paper storage box, and limiting plates are fixedly installed at the four corners of the top surface of the paper placing platform.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model has a simple structure, is convenient and practical by arranging multiple groups of suction heads. It can only stably absorb the first sheet of paper at the top at a time, and is used in conjunction with the cylinder. In the process of lifting the paper, the paper adsorbed under the first sheet of paper automatically falls down, further avoiding the transportation of multiple sheets of paper. In conjunction with the paper feeding structure and the paper pressing structure, the paper feeding efficiency is improved and the error rate of paper feeding is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the paper feeding mechanism of the utility model;

[0019] Figure 2 This is a schematic diagram of the bottom structure of the paper feeding mechanism of the utility model;

[0020] Figure 3 This is a schematic diagram of the paper grabbing structure of the utility model.

[0021] In the figure: 1. paper storage box; 2. cylinder; 3. gantry; 4. rotating seat; 5. suction head; 6. connecting hose; 7. air pump; 8. limit block; 9. limit slot; 10. mounting plate; 11. paper feed table; 12. paper feed wheel; 13. first rotating shaft; 14. fixing plate; 15. first motor; 16. paper pressing wheel; 17. second rotating shaft; 18. second motor; 19. driving pulley; 20. belt; 21. driven pulley; 22. paper placing table; 23. limit plate. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figures 1 to 3 , the utility model provides a technical solution:

[0024] A paper feeding mechanism of a printing press comprises a paper storage box 1, a paper grabbing structure is arranged on one side of the paper storage box 1, the paper grabbing structure comprises a cylinder 2 and a gantry 3, the cylinder 2 is fixedly mounted on one side of the bottom of the paper storage box 1, a rotating seat 4 is fixedly mounted on the telescopic end of the cylinder 2, the bottom of the gantry 3 is rotatably mounted on the rotating seat 4, a plurality of suction heads 5 for sucking paper are fixedly mounted on the gantry 3, the suction heads 5 are connected to an air pump 7 through a pipe and a connecting hose 6 inside the gantry 3, the air pump 7 is fixedly mounted on one side of the paper storage box 1, a plurality of groups of suction heads 5 are arranged, the structure is simple, convenient and practical, only the first sheet of paper at the top can be stably sucked each time, and the suction heads 5 are used in the process of lifting the paper so that the suction heads 5 on the first sheet of paper can be sucked stably. The paper below a piece of paper falls down automatically, further avoiding the conveying of multiple sheets of paper and reducing the error rate of paper feeding; the limiting blocks 8 are fixedly connected to the top two sides of the gantry 3, and the limiting blocks 8 cooperate with the sliding clearance of the limiting grooves 9. By setting the limiting grooves 9 and the limiting blocks 8 for use together, the suction head 5 automatically moves toward the top of the paper feeding structure during the process of grabbing the paper and moving it up, ensuring stable paper feeding; the limiting grooves 9 are fixedly installed at the inner end of the mounting plate 10, and a paper placing platform 22 is fixedly installed at the bottom center of the paper storage box 1, and limiting plates 23 are fixedly installed at the four corners of the top surface of the paper placing platform 22. By setting the limiting plates 23, the correct placement of the paper can be ensured, and by setting the paper placing platform 22, it is convenient for the paper grabbing structure to grab the paper.

[0025] A paper feeding structure is provided at one end of the top of the paper storage box 1, and the paper feeding structure includes a paper feeding platform 11, which is fixedly installed on one side of the top of the paper storage box 1. A plurality of notches are opened on one side of the surface of the paper feeding platform 11, and a paper feeding wheel 12 is provided in the notch. The paper feeding wheel 12 is fixedly installed on a first rotating shaft 13, and the first rotating shaft 13 is rotatably installed on a fixed plate 14. The fixed plate 14 is fixedly installed on one end of the bottom of the paper feeding platform 11. One end of the first rotating shaft 13 is in transmission cooperation with the output end of the first motor 15, and the first motor 15 is fixedly installed on the outer side of the fixed plate 14. By setting the paper feeding structure, power for moving the paper can be provided to ensure that the paper enters the paper feeding platform 11 smoothly, thereby ensuring accurate paper supply.

[0026] Mounting plates 10 are fixedly installed on both sides of the paper feeding platform 11, and a paper pressing structure is arranged in the middle of the inner side of the mounting plate 10. The paper pressing structure includes a paper pressing wheel 16. The paper pressing wheel 16 is provided with several groups and is fixedly installed on the second rotating shaft 17. The paper pressing wheel 16 is rotatably installed in the middle of the inner side of the mounting plate 10 through the second rotating shaft 17. One end of the second rotating shaft 17 is transmission-connected to the output end of the second motor 18. The second motor 18 is fixedly installed on the outer side of the mounting plate 10. A driving pulley 19 is fixedly installed on the other end of the second rotating shaft 17. The driving pulley 19 is arranged on the outer side of another mounting plate 10. The driving pulley 19 is connected to the driven pulley 21 through a belt 20. The driven pulley 21 is fixedly connected with another group of paper pressing structures. The paper pressing structure is rotatably installed on the other end of the inner side of the mounting plate 10. By setting the paper pressing structure, it is ensured that the paper will not be folded or offset during the transportation process, thereby further improving the paper supply efficiency for the printing press.

[0027] When in use, the device is moved to a designated position, and the paper outlet of the paper feeding table 11 is aligned with the paper inlet of the external printing press, the stacked paper is placed in the middle of the limit plate 23 on the paper placing table 22, the first motor 15 and the second motor 18 are turned on, and the telescopic end of the cylinder 2 is controlled to move downward, and the telescopic end of the cylinder 2 drives the gantry 3 and the suction head 5 to move downward. When the suction head 5 is close to the paper, the air pump 7 is turned on, and the air pump 7 provides suction to the suction head 5 through the internal pipe connecting the hose 6 and the gantry 3, so that one end of the paper is adsorbed on the suction head 5, and the cylinder 2 is controlled. The telescopic end moves upward, and the gantry 3 moves upward at the same time. The top of the gantry 3 moves above the paper feed wheel 12 under the influence of the limiting block 8 and the limiting groove 9. When the top of the gantry 3 moves above the paper feed wheel 12, the air pump 7 is turned off, and the paper loses suction and falls on the paper feed wheel 12. The rotating paper feed wheel 12 transports the paper to the paper feed table 11 through friction, and enters under the two sets of pressure rollers 16 in turn, and continues to move. The paper passing through the paper feed table 11 enters the external printing machine for printing, and the control cylinder 2 drives the gantry 3 and the suction head 5 to move downward for the next grabbing.

[0028] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A paper feeding mechanism of a printing press, characterized in that: The invention comprises a paper storage box (1), one side of which is provided with a paper grabbing structure, the paper grabbing structure comprising a cylinder (2) and a gantry (3), the cylinder (2) being fixedly mounted on one side of the bottom of the paper storage box (1), the telescopic end of the cylinder (2) being fixedly mounted with a rotating seat (4), the bottom of the gantry (3) being rotatably mounted on the rotating seat (4), a plurality of suction heads (5) for sucking paper are fixedly mounted on the gantry (3), the suction heads (5) being connected to an air pump (7) through pipes and connecting hoses (6) inside the gantry (3), the air pump (7) being fixedly mounted on one side of the paper storage box (1), limiting blocks (8) being fixedly connected to both sides of the top of the gantry (3), the limiting blocks (8) being matched with a limiting groove (9) in sliding clearance, the limiting groove (9) being fixedly mounted on one end of the inner side of a mounting plate (10), and a paper feeding structure being arranged at one end of the top of the paper storage box (1).

2. A paper feeding mechanism for a printing press according to claim 1, characterized in that: The paper feeding structure comprises a paper feeding platform (11), wherein the paper feeding platform (11) is fixedly installed on one side of the top of the paper storage box (1), and a plurality of notches are provided on one side of the surface of the paper feeding platform (11), wherein paper feeding wheels (12) are arranged in the notches.

3. A paper feeding mechanism for a printing press according to claim 2, characterized in that: The paper feeding wheel (12) is fixedly mounted on a first rotating shaft (13), the first rotating shaft (13) is rotatably mounted on a fixed plate (14), the fixed plate (14) is fixedly mounted on one end of the bottom of the paper feeding platform (11), one end of the first rotating shaft (13) is transmission-matched with an output end of a first motor (15), and the first motor (15) is fixedly mounted on the outer side of the fixed plate (14).

4. The paper feeding mechanism of a printing press according to claim 3, characterized in that: Mounting plates (10) are fixedly mounted on both sides of the paper feeding platform (11); a paper pressing structure is arranged in the middle of the inner side of the mounting plate (10); the paper pressing structure comprises a paper pressing wheel (16); the paper pressing wheel (16) is provided with a plurality of groups and is fixedly mounted on a second rotating shaft (17); the paper pressing wheel (16) is rotatably mounted in the middle of the inner side of the mounting plate (10) via the second rotating shaft (17).

5. A paper feeding mechanism for a printing press according to claim 4, characterized in that: One end of the second rotating shaft (17) is drivingly connected to the output end of the second motor (18), and the second motor (18) is fixedly mounted on the outside of the mounting plate (10).

6. A paper feeding mechanism for a printing press according to claim 5, characterized in that: A driving pulley (19) is fixedly mounted on the other end of the second rotating shaft (17). The driving pulley (19) is arranged outside another mounting plate (10). The driving pulley (19) is connected to a driven pulley (21) via a belt (20).

7. A paper feeding mechanism for a printing press according to claim 6, characterized in that: The driven pulley (21) is fixedly connected to another set of paper pressing structures, and the paper pressing structures are rotatably mounted on the other end of the inner side of the mounting plate (10).

8. The paper feeding mechanism of a printing press according to claim 1, characterized in that: A paper placing platform (22) is fixedly installed at the center of the bottom of the paper storage box (1), and limiting plates (23) are fixedly installed at the four corners of the top surface of the paper placing platform (22).

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