Paper feeding precision adjusting mechanism of printing machine

Abstract

The utility model relates to the field of paperboard conveying equipment, in particular to a printer paper feeding precision adjusting mechanism which comprises a first paper blocking plate and a second paper blocking plate, a base plate is arranged behind the second paper blocking plate, a through groove is formed in the middle of the base plate, and a connecting rod penetrates through the through groove and is rotationally connected with a first eccentric shaft. One end of the first eccentric shaft penetrates through the adjusting seat and then is connected with a rocking plate, an indexing pin is mounted on the rocking plate, a plurality of positioning holes are uniformly formed in the adjusting seat, and the rocking plate is rotated after the indexing pin is pulled out, so that the first eccentric shaft pulls the second paper blocking plate through the connecting rod to swing by a certain angle by taking a hinge point of the second paper blocking plate and the base plate as a fulcrum; finally, the indexing pins are inserted into the positioning holes with the corresponding angles to be fixed, so that the angle of the front paper baffle can be adjusted according to errors generated in the machining and assembling processes of the printing machine, the placement state of the corrugated paper board before entering the printing machine is changed, the paper feeding precision is improved, the paper feeding deviation phenomenon is eliminated, and printing displacement is prevented; and the production yield is further improved.

Description

Technical Field

[0001] This utility model relates to the field of cardboard conveying equipment, and in particular to a paper feeding accuracy adjustment mechanism for a printing press. Background Technology

[0002] Corrugated cardboard is a widely used packaging paperboard. After the corrugated cardboard is made into a certain size, it still needs to be printed. For example, information and patterns of the packaged items are printed on the surface of the corrugated cardboard. During the process of conveying the corrugated cardboard to the printing press, it needs to be conveyed by a paper feeding device. The paper feeding device conveys the bottom layer of the stacked cardboard to the printing press in sequence.

[0003] Two front baffles are installed on the paper feeding equipment to prevent the bottom layer of cardboard from entering the printing press, thus allowing the cardboard to enter the printing press one sheet at a time for printing, achieving the paper separation function. The two front baffles are arranged side by side. Before the feeding begins, the cardboard can be positioned by the two front baffles, so that the left and right ends of the cardboard are aligned. Ideally, the two front baffles should be on the same plane, so that the cardboard is perpendicular to the feeding direction. However, due to various errors in the processing and assembly of the front baffle components, it cannot be guaranteed that the two front baffles are on the same plane. If this error is too large, the cardboard will be tilted to one side before it is fed into the printing press, and the cardboard will deviate after being fed into the printing press, reducing the paper feeding accuracy. If the error caused by this processing and assembly is not in the paper feeding front baffle components, but in other parts of the printing press, then even if the two front baffles are on the same plane and the corrugated cardboard is fed into the printing press in a normal state, there will still be printing misalignment problems, reducing the production yield. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a paper feeding accuracy adjustment mechanism for a printing press that can adjust the angle of the front board according to the errors generated during the processing and assembly of the printing press, change the placement state of the corrugated board before entering the printing press, improve the paper feeding accuracy, eliminate the paper feeding deviation phenomenon and prevent printing misalignment, thereby improving the production yield.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A paper feeding accuracy adjustment mechanism for a printing press includes a first guide plate and a second guide plate disposed on one side of the first guide plate. A base plate is provided behind the second guide plate, and the bottom of the base plate is hinged to the rear side of the second guide plate. A through groove is provided in the middle of the base plate, through which a connecting rod is passed. One end of the connecting rod is hinged to the rear side of the second guide plate, and the other end is rotatably connected to a first eccentric shaft. The two ends of the first eccentric shaft are respectively rotatably connected to two adjusting seats. Both adjusting seats are fixed to the rear side of the base plate. One end of the first eccentric shaft passes through the adjusting seat and is connected to a rocker plate. An indexing pin is installed on the rocker plate. A plurality of positioning holes are evenly arranged on one of the adjusting seats, and the indexing pin is movably inserted into the plurality of positioning holes.

[0007] Preferably, one end of the first eccentric shaft is connected to the rocker plate by a key, and after passing through the rocker plate, it is connected to a stud. The stud is connected to a locking nut by a thread, and the locking nut abuts against the rocker plate.

[0008] Preferably, the first eccentric shaft is rotatably connected to the connecting rod via a first bearing, and is rotatably connected to the adjusting seat via a second bearing.

[0009] Preferably, a push-pull seat is connected to the rear side of the second board, and one end of the connecting rod is rotatably connected to the push-pull seat through a third bearing.

[0010] Preferably, a hinge is connected to the rear side of the second board, a rotating shaft is connected to the hinge, a support is connected to the bottom of the base plate, and the rotating shaft is rotatably connected to the support through a fourth bearing.

[0011] Preferably, the system also includes a paperboard conveying mechanism, with the first and second paperboard blocks positioned above the paperboard conveying mechanism. The paperboard conveying mechanism includes several feeding rollers evenly arranged in the horizontal direction.

[0012] Preferably, a second eccentric shaft is also included. A chamfered block and a lifting slider are connected to the rear side of the first baffle plate and the rear side of the base plate. The chamfered block is located above the lifting slider, and the lifting slider is slidably connected to a vertical guide rail. The upper inner side of the chamfered block abuts against the second eccentric shaft, and one end of the second eccentric shaft is connected to a first reduction motor.

[0013] Preferably, a sliding plate is connected to the rear side of the vertical guide rail, a lead screw nut and a translation slider are connected to the rear side of the sliding plate, the translation slider is slidably connected to the horizontal guide rail, the lead screw nut is threadedly connected to a horizontal lead screw, and one end of the horizontal lead screw is connected to a second reduction motor.

[0014] The beneficial effects of this utility model are as follows:

[0015] The paper feeding accuracy adjustment mechanism of this printing press adjusts the angle of the front board by pulling out the indexing pin and rotating the rocker plate. This causes the first eccentric shaft to pull the second board stop through the connecting rod and swing it at a certain angle with the hinge point with the base plate as the fulcrum. Finally, the indexing pin is inserted into the positioning hole at the corresponding angle for fixation. This allows for adjustment of the angle of the front board stop according to the errors generated during the printing press processing and assembly. It changes the placement state of the corrugated board before it enters the printing press, improves paper feeding accuracy, eliminates paper feeding deviation, and prevents printing misalignment, thereby improving the production yield. Attached Figure Description

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

[0017] Figure 2 This is a rear view of the connection structure between the second cardboard section and the base plate.

[0018] Figure 3 for Figure 2 Sectional view at point AA.

[0019] Figure 4 The right view shows the connection structure between the second cardboard section and the base plate.

[0020] Figure 5 This is a three-dimensional schematic diagram of the connection structure between the second section of the cardboard and the base plate.

[0021] Figure 6 This is a schematic diagram showing the conveying process of corrugated cardboard.

[0022] Figure 7 This is the front view of the present invention.

[0023] Figure 8 for Figure 7 Sectional view at point BB.

[0024] Figure 9 for Figure 7 Sectional view at point CC.

[0025] Figure 10 This is a schematic diagram showing the state of the first and second paperboard sections before the distance between them is adjusted.

[0026] Figure 11 This is a schematic diagram showing the state after the distance between the first and second paperboard sections has been adjusted.

[0027] In the diagram: 1. First guide plate; 2. Second guide plate; 3. Base plate; 4. Through slot; 5. Connecting rod; 6. First eccentric shaft; 7. Adjusting seat; 8. Rocker plate; 9. Indexing pin; 10. Positioning hole; 11. Locking nut; 12. First bearing; 13. Second bearing; 14. Push-pull seat; 15. Third bearing; 16. Hinge seat; 17. Rotating shaft; 18. Support; 19. Fourth bearing; 20. Paper feeding roller; 21. Second eccentric shaft; 22. C-shaped block; 23. Lifting slider; 24. Vertical guide rail; 25. First geared motor; 26. Sliding plate; 27. Lead screw nut; 28. Translation slider; 29. ​​Horizontal guide rail; 30. Horizontal lead screw; 31. Second geared motor. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-5 This utility model provides a technical solution: a paper feeding accuracy adjustment mechanism for a printing press, including a first guide plate 1 and a second guide plate 2 disposed on one side of the first guide plate 1. A base plate 3 is provided behind the second guide plate 2. The bottom of the base plate 3 is hinged to the rear side of the second guide plate 2, and a through groove 4 is provided in the middle. A connecting rod 5 is passed through the through groove 4. One end of the connecting rod 5 is hinged to the rear side of the second guide plate 2, and the other end is rotatably connected to a first eccentric shaft 6. The two ends of the first eccentric shaft 6 are respectively rotatably connected to two adjusting seats 7. Both adjusting seats 7 are fixed to the rear side of the base plate 3. One end of the first eccentric shaft 6 passes through the adjusting seat 7 and is connected to a rocker plate 8. An indexing pin 9 is installed on the rocker plate 8. A plurality of positioning holes 10 are evenly arranged on one of the adjusting seats 7, and the indexing pin 9 is movably inserted into the plurality of positioning holes 10 respectively.

[0030] By pulling the indexing pin 9 out of the positioning hole 10 and rotating the rocker plate 8, the first eccentric shaft 6 pulls the second guide plate 1 through the connecting rod 5 to swing at a certain angle with the hinge point with the base plate 3 as the fulcrum. Finally, the indexing pin 9 is inserted into another positioning hole 10 at the corresponding angle for fixation. This allows for angle adjustment based on the error generated during the assembly of the front guide plate, so that the first guide plate 1 and the second guide plate 2 are on the same plane, eliminating paper feeding deviation and improving paper feeding accuracy. Alternatively, the angle can be adjusted based on the error generated in other parts of the printing press, so that the first guide plate 1 and the second guide plate 2 are misaligned. This misalignment changes the placement state of the paperboard before it enters the printing press, so that the paperboard cancels out the machine error after being fed into the printing press, preventing printing deviation and improving the production yield.

[0031] To facilitate the installation and disassembly of the rocker plate 8, in this embodiment, preferably, one end of the first eccentric shaft 6 is connected to the rocker plate 8 via a key, and after passing through the rocker plate 8, it is connected to a stud. The stud is threadedly connected to a locking nut 11, which abuts against the rocker plate 8. The purpose is to limit and lock the rocker plate 8 to a certain extent after it is connected to the first eccentric shaft 6 via a key, thereby improving the ease of installation and stability of the rocker plate 8. After unscrewing the locking nut 11 from the stud, the rocker plate 8 can be easily disassembled.

[0032] To facilitate the smooth rotation of the first eccentric shaft 6, in this embodiment, preferably, the first eccentric shaft 6 is rotatably connected to the connecting rod 5 via the first bearing 12, and is rotatably connected to the adjusting seat 7 via the second bearing 13.

[0033] In order to facilitate and improve the smoothness of pushing and pulling the second baffle 2, in this embodiment, preferably, a push-pull seat 14 is connected to the rear side of the second baffle 2, and one end of the connecting rod 5 is rotatably connected to the push-pull seat 14 through a third bearing 15.

[0034] To facilitate and improve the smoothness of the swing of the second baffle 1 with the hinge point with the base plate 3 as the fulcrum, in this embodiment, preferably, a hinge seat 16 is connected to the rear side of the second baffle 2, the hinge seat 16 is connected to a rotating shaft 17, and a support 18 is connected to the bottom of the base plate 3. The rotating shaft 17 is rotatably connected to the support 18 through a fourth bearing 19. The purpose is to enable the second baffle 1 to swing with the rotating shaft 17 as the fulcrum. The rotating shaft 17 is rotatably connected to the support 18 through the fourth bearing 19, thereby improving the smoothness of the swing of the second baffle 1.

[0035] To facilitate the horizontal transport of corrugated cardboard, this embodiment preferably includes a cardboard conveying mechanism. The first cardboard block 1 and the second cardboard block 2 are both located above the cardboard conveying mechanism. The cardboard conveying mechanism includes several feeding rollers 20 evenly arranged in the horizontal direction. The purpose is to create a gap between the lowest point of the first cardboard block 1 and the second cardboard block 2 and the highest point of the feeding rollers 20. The size of this gap is the thickness of a corrugated cardboard sheet, so that only the bottom cardboard sheet can pass through this gap, while the remaining cardboard sheets are blocked by the first cardboard block 1 and the second cardboard block 2, thus achieving the paper separation function. The corrugated cardboard is horizontally transported by the several feeding rollers 20 evenly arranged in the horizontal direction.

[0036] Please see Figure 6 To facilitate adjusting the gap height according to the thickness of different corrugated cardboard, thereby improving applicability, this embodiment preferably includes a second eccentric shaft 21. A U-shaped block 22 and a lifting slider 23 are connected to the rear side of the first baffle 1 and the rear side of the base plate 3, respectively. The U-shaped block 22 is positioned above the lifting slider 23, which is slidably connected to a vertical guide rail 24. The upper inner side of the U-shaped block 22 abuts against the second eccentric shaft 21. One end of the second eccentric shaft 21 is connected to a first reduction motor 25, the purpose of which is to drive the second eccentric shaft 21 to rotate via the first reduction motor 25. During the rotation of the second eccentric shaft 21, the chamfered block 22 can be raised and lowered. In turn, the chamfered block 22 drives the first cardboard block 1 and the base plate 3 to move up and down along the vertical guide rail 24. The height of the gap can be adjusted according to the thickness of different corrugated cardboards. If the gap is too large, the second cardboard may also be fed in, causing paper feeding chaos and cardboard deviation. If the gap is too small, the cardboard may rub against the first cardboard block 1 and the second cardboard block 2 during the movement, which will also cause the cardboard to deviate. The above-mentioned lifting and adjusting structure effectively solves these two problems and improves applicability.

[0037] Please see Figures 7-9To facilitate adjusting the distance between the first baffle 1 and the second baffle 2 according to different corrugated cardboard widths, in this embodiment, preferably, a sliding plate 26 is connected to the rear side of the vertical guide rail 24, and a lead screw nut 27 and a sliding slider 28 are connected to the rear side of the sliding plate 26. The sliding slider 28 is slidably connected to a horizontal guide rail 29. The lead screw nut 27 is threadedly connected to a horizontal lead screw 30, and one end of the horizontal lead screw 30 is connected to a second reduction motor 31. The purpose is to drive the horizontal lead screw 30 to rotate through the second reduction motor 31. When the horizontal lead screw 30 rotates, the sliding plate 26, which is equipped with the lead screw nut 27 and the sliding slider 28, slides left and right along the horizontal guide rail 29, thereby driving the first baffle 1 and the second baffle 2 to move left and right, realizing the adjustment of the distance between the first baffle 1 and the second baffle 2. This is suitable for corrugated cardboard of different widths. If the spacing between the cardboard and the two front baffles is not coordinated, for example, if the cardboard is blocked by the front baffles and the position is close to the middle, such as... Figure 10 As shown, the instantaneous impact force of the paper feed rollers 20 on the paperboard during feeding can easily pull the paperboard to the left or right, causing the paper feed to deviate. Therefore, the distance between the two front guide plates can be adjusted and increased, such as... Figure 11 As shown, this eliminates the cardboard misalignment phenomenon in this situation.

[0038] The working principle and usage process of this utility model are as follows: The first reduction motor 25 drives the second eccentric shaft 21 to rotate. During the rotation of the second eccentric shaft 21, the eccentric block 22 can be driven to rise and fall. In turn, the eccentric block 22 drives the first stop plate 1 and the base plate 3 to rise and fall along the vertical guide rail 24. The height of the gap can be adjusted according to the thickness of different corrugated cardboard. The second reduction motor 31 drives the horizontal lead screw 30 to rotate. When the horizontal lead screw 30 rotates, the sliding plate 26 equipped with the lead screw nut 27 and the translation slider 28 slides left and right along the horizontal guide rail 29. In turn, the first stop plate 1 and the second stop plate 2 move left and right, realizing the adjustment of the distance between the first stop plate 1 and the second stop plate 2. It is suitable for corrugated cardboard of different widths.

[0039] By pulling the indexing pin 9 out of the positioning hole 10 and rotating the rocker plate 8, the first eccentric shaft 6 pulls the second guide plate 1 through the connecting rod 5 to swing at a certain angle with the hinge point with the base plate 3 as the fulcrum. Finally, the indexing pin 9 is inserted into another positioning hole 10 at the corresponding angle for fixation. This allows for angle adjustment based on the error generated during the assembly of the front guide plate, so that the first guide plate 1 and the second guide plate 2 are on the same plane, eliminating paper feeding deviation and improving paper feeding accuracy. Alternatively, the angle can be adjusted based on the error generated in other parts of the printing press, so that the first guide plate 1 and the second guide plate 2 are misaligned. This misalignment changes the placement state of the paperboard before it enters the printing press, so that the paperboard cancels out the machine error after being fed into the printing press, preventing printing deviation and improving the production yield.

[0040] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A paper feeding accuracy adjustment mechanism for a printing press, comprising a first guide plate (1) and a second guide plate (2) disposed on one side of the first guide plate (1), characterized in that: A base plate (3) is provided behind the second baffle plate (2). The bottom of the base plate (3) is hinged to the rear side of the second baffle plate (2), and a through groove (4) is provided in the middle. A connecting rod (5) is provided through the through groove (4). One end of the connecting rod (5) is hinged to the rear side of the second baffle plate (2), and the other end is rotatably connected to a first eccentric shaft (6). The two ends of the first eccentric shaft (6) are rotatably connected to two adjusting seats (7). Both adjusting seats (7) are fixed to the rear side of the base plate (3). One end of the first eccentric shaft (6) passes through the adjusting seat (7) and is connected to a rocker plate (8). An indexing pin (9) is installed on the rocker plate (8). Several positioning holes (10) are evenly arranged on one of the adjusting seats (7). The indexing pin (9) is movably inserted into several positioning holes (10).

2. The paper feeding accuracy adjustment mechanism for a printing press according to claim 1, characterized in that: One end of the first eccentric shaft (6) is connected to the rocker plate (8) by a key, and after passing through the rocker plate (8), it is connected to a stud. The stud is connected to a locking nut (11) by a thread, and the locking nut (11) abuts against the rocker plate (8).

3. The paper feeding accuracy adjustment mechanism for a printing press according to claim 1, characterized in that: The first eccentric shaft (6) is rotatably connected to the connecting rod (5) through the first bearing (12), and is rotatably connected to the adjusting seat (7) through the second bearing (13).

4. The paper feeding accuracy adjustment mechanism for a printing press according to claim 1, characterized in that: The rear side of the second baffle plate (2) is connected to a push-pull seat (14), and one end of the connecting rod (5) is rotatably connected to the push-pull seat (14) through a third bearing (15).

5. The paper feeding accuracy adjustment mechanism for a printing press according to claim 1, characterized in that: The rear side of the second baffle plate (2) is connected to a hinge (16), the hinge (16) is connected to a rotating shaft (17), the bottom of the base plate (3) is connected to a support (18), and the rotating shaft (17) is rotatably connected to the support (18) through a fourth bearing (19).

6. The paper feeding accuracy adjustment mechanism for a printing press according to claim 1, characterized in that: It also includes a paperboard conveying mechanism, wherein the first paperboard stop (1) and the second paperboard stop (2) are both disposed above the paperboard conveying mechanism, and the paperboard conveying mechanism includes a plurality of paper feeding rollers (20) evenly arranged in the horizontal direction.

7. The printing press paper feeding accuracy adjustment mechanism according to claim 1, characterized in that: It also includes a second eccentric shaft (21). The rear side of the first baffle plate (1) and the rear side of the base plate (3) are both connected to a C-shaped block (22) and a lifting slider (23). The C-shaped block (22) is located above the lifting slider (23). The lifting slider (23) is slidably connected to a vertical guide rail (24). The upper inner side of the C-shaped block (22) abuts against the second eccentric shaft (21). One end of the second eccentric shaft (21) is connected to a first reduction motor (25).

8. The paper feeding accuracy adjustment mechanism for a printing press according to claim 7, characterized in that: A sliding plate (26) is connected to the rear side of the vertical guide rail (24). A lead screw nut (27) and a translation slider (28) are connected to the rear side of the sliding plate (26). The translation slider (28) is slidably connected to a horizontal guide rail (29). A horizontal lead screw (30) is threadedly connected to the lead screw nut (27). One end of the horizontal lead screw (30) is connected to a second reduction motor (31).

Images