A paper pressing device for a printing machine

Abstract

The utility model relates to printing machine technical field discloses a printing machine is with paper pressing device, including operation panel, the both ends of operation panel are provided with two press plates, the top of operation panel swing type connection has the cylinder, the both ends fixed type connection of press plate have two insertion blocks, the one end of operation panel is processed and has two insertion slots, and the insertion block plug -in type connection is in the inside of insertion slot, the one end fixed type connection of pull plate has the connecting plate, the one side fixed type connection of connecting plate has the movable rod, the one end fixed type connection of movable rod has the lock tongue, and the lock tongue plug -in type connection is in the inside of lock slot, through press plate and insert both ends insertion block operation panel insertion slot, through the elastic extrusion force of press plate bottom rubber strip and fix paper one end, then rotate the lifting screw, make the side plate drive cylinder and descend to with paper gently contact, again promote crossbeam and drive cylinder along paper horizontal uniform velocity movement, through rolling pressure and smooth out the wrinkle, finally use another press plate and fix paper other end, prevent paper offset dislocation when printing.

Description

Technical Field

[0001] This utility model relates to the field of printing press technology, specifically to a paper pressing device for a printing press. Background Technology

[0002] Printing presses are the core equipment for printing text and images. In special printing scenarios such as glass decals and enamel decals, screen printing machines are widely used. The traditional printing process is as follows: the paper to be printed is placed on the platform, the paper is fixed by pressing down the screen frame, and then the squeegee moves on the screen to scrape the ink to complete the pattern printing.

[0003] However, the existing paper fixing method of screen printing machines has obvious defects: relying solely on the single downward pressure of the screen frame to fix the paper can prevent the paper from slipping to a certain extent, but it cannot effectively guarantee the flatness of the paper surface. In actual operation, wrinkles are easily generated during the paper laying process, and it is difficult to smooth out the existing wrinkles when the screen frame presses down. These wrinkles will directly cause problems such as misalignment and blurring of the printed pattern, seriously affecting the quality of the printed product.

[0004] Therefore, we propose a paper pressing device for printing presses to solve the above problems. Utility Model Content

[0005] To address the technical problem that wrinkles easily occur during the existing paper laying process, which directly leads to misalignment of printed patterns, this utility model provides a paper pressing device for printing presses.

[0006] This utility model is achieved using the following technical solution: a paper pressing device for a printing machine, including an operating table, two pressure plates at both ends of the operating table, a roller movably connected to the top of the operating table, two insert blocks fixedly connected to both ends of the pressure plates, two slots machined at one end of the operating table, the insert blocks being inserted into the slots, two pull plates at one end of the operating table, a connecting plate fixedly connected to one end of the pull plates, a movable rod fixedly connected to one side of the connecting plate, a locking tongue fixedly connected to one end of the movable rod, a locking groove machined on the inner side of the insert blocks, and the locking tongue being inserted into the locking groove. The operating platform has two fixed sliding grooves on both sides, and columns are slidably connected to the outer sides of the sliding grooves. A crossbeam is fixedly connected to the top of the column, and two side plates are movably connected to both ends of the crossbeam. The two ends of the roller are rotatably connected between the two side plates.

[0007] Preferably, a rubber strip is fixedly connected to the bottom of the pressure plate.

[0008] Preferably, a top plate is fixedly connected to the top of the two side plates, and a lifting screw is threadedly connected to the middle of the top plate. The bottom end of the lifting screw is rotatably connected to the top of the crossbeam.

[0009] Preferably, the inside of the operating table is machined with a groove, and one end of the movable rod is fixedly connected to a fixing ring, which is movably connected inside the groove.

[0010] Preferably, a return spring is provided inside the groove. The return spring is located outside the movable rod. One end of the return spring is fixedly connected to one side of the fixed ring, and the other end of the return spring is fixedly connected to the inner wall of one end of the groove.

[0011] Preferably, one end of the groove is machined with a connecting groove, and the connecting plate is movably connected inside the connecting groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are: In use, the two end blocks are inserted into the slots of the operating table by pressing the plate. One end of the decal is fixed by the elastic squeezing force of the rubber strip at the bottom of the plate. Then, the lifting screw is rotated to make the side plate move the roller down to gently contact the decal. Then, the crossbeam is pushed to move the roller horizontally and uniformly along the decal. The rolling pressure smooths out the wrinkles. Finally, another plate is used to fix the other end of the decal, so as to limit the two ends and prevent the paper from shifting or misaligning during printing.

[0013] When using this utility model, after printing is completed, press the pull plates at both ends of the pressure plate to make them move towards each other. The pull plates drive the movable rod and the end locking tongue to move outward through the connecting plate, so that the locking tongue disengages from the locking groove of the slot. After releasing the limiting position of the insert block, lift the pressure plate upward to complete the disassembly. The operation is convenient and can be completed quickly by a single person, improving the efficiency of material changing. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the roller position structure of this utility model; Figure 3 This is a sectional view of the operating table of this utility model; Figure 4 For the present utility model Figure 3 Enlarged schematic diagram of part A in the middle.

[0015] In the diagram: 1. Operating platform; 2. Pressure plate; 3. Roller; 4. Rubber strip; 5. Insert block; 6. Slot; 7. Pull plate; 8. Connecting plate; 9. Movable rod; 10. Locking tongue; 11. Locking groove; 12. Column; 13. Slide groove; 14. Crossbeam; 15. Lifting screw; 16. Top plate; 17. Side plate; 18. Groove; 19. Fixing ring; 20. Return spring; 21. Connecting groove. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0017] Example 1: Please refer to Figure 1 - Figure 4 This embodiment of a paper pressing device for a printing press includes an operating table 1. Two pressure plates 2 are provided at both ends of the operating table 1. A roller 3 is movably connected to the top of the operating table 1. Two insert blocks 5 are fixedly connected to both ends of the pressure plates 2. Two slots 6 are machined at one end of the operating table 1. The insert blocks 5 are plugged into the slots 6. Two pull plates 7 are provided at one end of the operating table 1. A connecting plate 8 is fixedly connected to one end of the pull plate 7. A movable rod 9 is fixedly connected to one side of the connecting plate 8. A locking tongue 10 is fixedly connected to one end of the movable rod 9. A locking groove 11 is machined on the inner side of the insert blocks 5. The locking tongue 10 is plugged into the locking groove 11. Two sliding grooves 13 are fixedly connected to both sides of the operating table 1. A column 12 is slidably connected to the outer side of the sliding grooves 13. A crossbeam 14 is fixedly connected to the top of the column 12. Two side plates 17 are movably connected to both ends of the crossbeam 14. The two ends of the roller 3 are rotatably connected between the two side plates 17. A rubber strip 4 is fixedly connected to the bottom of the pressure plate 2. First, the decal to be printed is laid flat on the top surface of the workbench 1, ensuring that the edge of the decal is aligned with the baseline of the workbench, laying the foundation for the subsequent fixing process. Then, a pressure plate 2 is taken, and the inserts 5 at both ends are aligned with the slots 6 preset on the edge of the workbench 1 and inserted. The rubber strip 4 installed at the bottom of the pressure plate 2 comes into close contact with one end of the decal surface as the inserts 5 are inserted. The elastic deformation of the rubber strip 4 generates squeezing force to reliably fix one end of the decal. At the same time, the rubber material can avoid causing pressure marks or damage to the decal surface. Then, rotate the lifting screw 15. The lifting screw 15 drives the side plate 17 to move downward in the vertical direction through the thread transmission. The side plate 17 drives the inner roller 3 to move down synchronously until the outer surface of the roller 3 gently contacts the decal surface on the operating table 1. The contact pressure should be such that it can smooth out the wrinkles without damaging the decal. Then push the crossbeam 14 manually or through the drive mechanism. The crossbeam 14 is fixedly connected to the side plate 17, which in turn drives the roller 3 to move horizontally and at a constant speed along the surface of the decal. During the rolling process, the roller 3 applies uniform pressure to the surface of the decal, which completely smooths out the wrinkles caused by the laying of the decal and keeps the decal flat. After the wrinkles are smoothed out, the other end of the decal is fixed by another pressure plate 2 in the same way as the first step. At this time, both ends of the decal are reliably limited, which effectively avoids printing misalignment caused by paper shift during the printing process. Secondly, when the printing is complete and the decal needs to be removed, disassemble the pressure plate 2 according to the following steps: Press the pull plates 7 at both ends of the pressure plate 2 with your fingers at the same time, so that the two pull plates 7 move towards each other along the sliding groove inside the pressure plate; the pull plates 7 drive the movable rod 9 to move outward in the horizontal direction through the connecting plate 8, and the locking tongue 10 connected to the end of the movable rod 9 moves outward synchronously with the movable rod, so that the locking tongue 10 disengages from the locking groove 11 opened in the inner wall of the slot 6, thereby releasing the limiting lock on the insert 5; finally, lift the pressure plate 2 vertically upward to remove the insert 5 from the slot 6, and complete the disassembly of the pressure plate. The whole process is simple and convenient to operate, and can be completed quickly by one person, which greatly improves the material changing efficiency; Furthermore, a top plate 16 is fixedly connected to the top of the two side plates 17, and a lifting screw 15 is threadedly connected to the middle of the top plate 16. The bottom end of the lifting screw 15 is rotatably connected to the top of the crossbeam 14. Then, by rotating the lifting screw 15, the lifting screw 15 will drive the top plate 16 to move downward, the top plate 16 will drive the side plates 17 to move downward, and the side plates 17 will drive the roller 3 to move downward, so that the roller 3 contacts the decal on the surface of the operating table 1. Furthermore, the inside of the operating table 1 is machined with a groove 18, and one end of the movable rod 9 is fixedly connected to a fixed ring 19. The fixed ring 19 is movably connected inside the groove 18. When the connecting plate 8 drives the movable rod 9 to move, the movable rod 9 will drive the fixed ring 19 to move. The fixed ring 19 will move along the inside of the groove 18, and the groove 18 will limit the movement of the fixed ring 19. Furthermore, a return spring 20 is provided inside the groove 18. The return spring 20 is located outside the movable rod 9. One end of the return spring 20 is fixedly connected to one side of the fixed ring 19, and the other end of the return spring 20 is fixedly connected to the inner wall of one end of the groove 18. With the return spring 20 provided, when the pull plate 7 is pulled, the fixed ring 19 will drive the return spring 20 to compress. When the pull plate 7 is released, the return spring 20 will return to its original position and extend. The return spring 20 will drive the fixed ring 19 and the movable rod 9 to move, thereby allowing the lock tongue 10 to be inserted into the interior of the lock groove 11. Furthermore, a connecting groove 21 is machined at one end of the groove 18. The connecting plate 8 is movably connected inside the connecting groove 21. When the pulling plate 7 is squeezed, the pulling plate 7 will drive the connecting plate 8 to move. The connecting plate 8 will move along the inside of the connecting groove 21, and the connecting groove 21 will limit the movement of the connecting plate 8.

[0018] Working principle: By placing the decal paper on the top surface of the operating table 1, the inserts 5 at both ends of a pressure plate 2 are inserted into the slot 6, so that the rubber strip 4 contacts and presses one end of the decal paper to fix it, thus fixing one end of the decal paper. Then, the lifting screw 15 is rotated, so that the side plate 17 drives the roller 3 to move downward, so that the roller 3 contacts the decal paper on the surface of the operating table 1. Then, the crossbeam 14 is moved, which drives the roller 3 to move. The roller 3 smooths out the wrinkles on the surface of the decal paper. Finally, the other end of the decal paper is fixed by another pressure plate 2, thus preventing the paper from shifting during the printing process.

[0019] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A paper pressing device for a printing press, comprising an operating table (1), characterized in that, The operating table (1) has two pressure plates (2) at both ends. The top of the operating table (1) is movably connected to a roller (3). The two ends of the pressure plates (2) are fixedly connected to two inserts (5). The operating table (1) has two slots (6) at one end. The inserts (5) are plugged into the slots (6). The operating table (1) has two pull plates (7) at one end. The pull plates (7) are fixedly connected to a connecting plate (8). The connecting plate (8) is fixedly connected to a movable rod (9) on one side. The movable rod (9) is fixedly connected to a locking tongue (10) at one end. The inserts (5) have a locking groove (11) on the inner side. The locking tongue (10) is plugged into the locking groove (11). The operating table (1) has two fixed sliding grooves (13) on both sides, and a column (12) is slidably connected to the outside of the sliding grooves (13). A crossbeam (14) is fixedly connected to the top of the column (12), and two side plates (17) are movably connected to both ends of the crossbeam (14). The two ends of the roller (3) are rotatably connected between the two side plates (17).

2. The paper pressing device for a printing press according to claim 1, characterized in that, The bottom of the pressure plate (2) is fixedly connected with a rubber strip (4).

3. The paper pressing device for a printing press according to claim 1, characterized in that, The top of the two side plates (17) is fixedly connected to a top plate (16), and the middle of the top plate (16) is threadedly connected to a lifting screw (15). The bottom end of the lifting screw (15) is rotatably connected to the top of the crossbeam (14).

4. A paper pressing device for a printing press according to claim 1, characterized in that, The operating table (1) has a groove (18) inside. One end of the movable rod (9) is fixedly connected to a fixing ring (19), which is movably connected inside the groove (18).

5. A paper pressing device for a printing press according to claim 4, characterized in that, A reset spring (20) is provided inside the groove (18). The reset spring (20) is located outside the movable rod (9). One end of the reset spring (20) is fixedly connected to one side of the fixed ring (19), and the other end of the reset spring (20) is fixedly connected to the inner wall of one end of the groove (18).

6. A paper pressing device for a printing press according to claim 4, characterized in that, One end of the groove (18) is machined with a connecting groove (21), and the connecting plate (8) is movably connected inside the connecting groove (21).

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