A plate feeding and pressing wheel mechanism for a direct to plate machine (CTP)

Abstract

The present invention discloses a plate feeding and pressing wheel mechanism of a direct plate-making machine (CTP), which relates to the technical field of direct plate-making machines, and includes a mounting seat; a pressing wheel mechanism, wherein the pressing wheel mechanism includes an adjusting cylinder fixedly connected to the lower end of the mounting seat, the inner wall of the adjusting cylinder is sealed and slidably connected with a sliding plug, the lower end of the sliding plug is fixedly connected with a connecting rod, the lower end of the connecting rod penetrates the lower end of the adjusting cylinder and is fixedly connected with a mounting frame, the inner wall of the mounting frame is rotatably connected with a rotating shaft, the side wall of the rotating shaft is fixedly connected with a pressing wheel, the lower end of the mounting seat is fixedly connected with a vertical cylinder, and the inner wall of the vertical cylinder is sealed and slidably connected with a slide plate. In the present invention, the thicker the thickness of the printing plate, the higher the height of the slide plate will be, and then the height of the sliding plug will be higher, so that the height of the pressing wheel will be higher, on the contrary, the thinner the thickness of the printing plate, the lower the height of the pressing wheel will be, so that the pressing wheel can automatically adjust the height according to the thickness of the printing plate, which is more accurate and more convenient to use than manual adjustment.

Description

Technical Field

[0001] The present invention relates to the technical field of direct to plate making machines, and in particular to a plate feeding and pressing wheel mechanism of a direct to plate making machine (CTP). Background Art

[0002] A direct platemaking machine, also known as a CTP platemaking machine, is a device that makes plates directly from a computer. It assembles pages assembled by a computer into a large plate according to the model of the printing press and the requirements of folding, and then directly forms an image on the printing plate after passing through RIP.

[0003] After searching, there is currently a patent for "Direct to Plate Making Machine (CTP) Plate Feeding Pressing Wheel Mechanism" with publication number "CN104890349B": it includes a fixed block fixedly mounted on a support shaft, the fixed block is provided with a limit block located on one side of the support shaft and a pressure plate located on the other side of the support shaft, a rocker arm is also rotatably mounted on the support shaft, the first end of the rocker arm is located below the limit block, an adjusting bolt with the lower end pressing against the upper surface of the first end of the rocker arm is installed on the limit block, the second end of the rocker arm is located below the pressure plate, a compression spring is provided between the pressure plate and the upper surface of the second end of the rocker arm, a pressure wheel device is installed on the second end of the rocker arm, the lifting and lowering of the rocker arm is adjusted by adjusting the adjusting bolt on the limit block, thereby driving the pressure wheel installed on the rocker arm to increase or decrease the pressure between the pressure wheel and the plate.

[0004] However, the above patents still have shortcomings in actual use:

[0005] 1. It needs to be adjusted manually by turning the bolts. Manual adjustment is required. There is a large error in manual adjustment. It cannot be adjusted accurately according to the thickness of the printing plate, and the adjustment is also troublesome.

[0006] 2. If there are bulges on the surface of the printing plate, there will be major quality problems in the plate making after printing. This patent does not have an integrated detection device, and the plate making needs to be tested separately later, which is time-consuming and labor-intensive.

[0007] 3. If there are dust and other attached pollutants on the surface of the printing plate, the quality of plate making will also be reduced. This patent lacks a cleaning device, and the printing plate needs to be cleaned manually before plate making, which is more troublesome. Summary of the invention

[0008] The purpose of the present invention is to solve the shortcomings of the above-mentioned technology and to propose a plate-feeding and pressing wheel mechanism for a direct-to-plate (CTP) machine.

[0009] In order to achieve the above object, the present invention adopts the following technical solutions:

[0010] A plate feeding and pressing wheel mechanism of a direct to plate machine (CTP), comprising a mounting seat;

[0011] The cam is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs, each of which is provided with a plurality of springs.

[0012] The side wall of the mounting seat is fixedly connected with an alarm, the inner wall of the cavity is embedded with an annular conductive plate, and the conductive slide plate, the alarm, the annular conductive plate and the external power supply are electrically connected through wires.

[0013] Preferably, the pressure wheel mechanism further comprises a second spring sleeved on the side wall of the slide rod, the two ends of the second spring are respectively fixedly connected to the lower end of the conductive slide plate and the bottom of the cavity, and the stiffness coefficient of the second spring is greater than the stiffness coefficient of the first spring.

[0014] Preferably, a marking mechanism is installed in the semicircular block, and the marking mechanism includes an ink cavity opened in the semicircular block, and a plurality of inkjet holes are opened on the inner wall of the ink cavity. A first airbag is fixedly connected between the conductive slide plate and the top of the cavity, and a one-way ink inlet tube is fixedly connected to the side wall of the first airbag. The first airbag is connected to the ink cavity through the one-way ink supply tube.

[0015] Preferably, a cleaning mechanism is installed on the mounting frame, and the cleaning mechanism includes a Z-shaped block fixedly connected to the inner wall of the mounting frame, a slide groove is opened at the lower end of the Z-shaped block, and two sliders are symmetrically slidably connected to the inner wall of the slide groove, and the side walls of the two sliders are fixedly connected to an L-shaped plate, and a plurality of bristles are fixedly connected to the lower end of the L-shaped plate.

[0016] Preferably, the cleaning mechanism also includes two reciprocating screws symmetrically rotatably connected to the inner wall of the slide groove, the side walls of the two reciprocating screws are respectively threadedly connected to the two sliding blocks, and the two reciprocating screws are fixedly connected, the side wall of the rotating shaft is fixedly connected to the first gear, one end of one of the reciprocating screws passes through the side wall of the Z-shaped block and is fixedly connected to the second gear, and the first gear is meshingly connected to the second gear.

[0017] Preferably, a dust suction mechanism is installed in the L-shaped plate, and the dust suction mechanism includes a dust suction cavity opened in the L-shaped plate, and a plurality of dust suction holes are opened on the inner wall of the dust suction cavity. A second airbag is fixedly connected between the L-shaped plate and the Z-shaped block, and the second airbag is connected to the dust suction cavity through a one-way dust suction pipe, and a one-way dust exhaust pipe is fixedly connected to the side wall of the second airbag.

[0018] Preferably, the mounting seat is fixedly mounted to the plate-making machine body by a plurality of bolts.

[0019] The present invention has the following beneficial effects:

[0020] 1. By setting the pressing wheel mechanism, the thicker the printing plate is, the higher the height of the slide plate will be, and then the height of the slide plug will be higher, making the height of the pressing wheel higher. On the contrary, the thinner the printing plate is, the lower the height of the pressing wheel will be, so that the pressing wheel can automatically adjust the height according to the thickness of the printing plate. Compared with manual adjustment, it is more accurate and more convenient to use;

[0021] 2. By setting an alarm and an annular conductive plate, when the printing plate moves to the bottom of the pressure wheel, the solenoid valve on the inner wall of the connecting pipe is powered off and closed, so that ventilation cannot be performed, the height of the pressure wheel cannot be changed, and the slide plate cannot continue to move up or down. When the protrusion on the surface of the printing plate moves to the semicircular block, it will squeeze the semicircular block. At this time, the semicircular block will drive the conductive slide plate to move upward through the slide rod. When the protrusion is large, the conductive slide plate moves upward to contact the annular conductive plate, the circuit is connected, and the alarm will sound, reminding the staff that there is a quality problem with the protrusion on the surface of the printing plate, which is convenient for timely processing;

[0022] 3. By setting a marking mechanism, the conductive slide plate will squeeze the first airbag when it moves upward, and the colored ink in the first airbag will be squeezed into the ink cavity through the one-way ink supply tube, and then the colored ink in the ink cavity will be sprayed out through multiple inkjet holes and sprayed onto the surface of the printing plate, forming an intermittent linear ink dot on the surface of the printing plate, which is convenient for the staff to quickly locate the raised part of the printing plate, thereby facilitating quick repair and saving time;

[0023] 4. By setting a cleaning mechanism, when the printing plate is moved under the pressure given by the pressing wheel, due to the friction between the pressing wheel and the printing plate, the pressing wheel will rotate, thereby driving the rotating shaft to rotate, driving the first gear to rotate, and then driving the second gear to rotate. By adjusting the transmission ratio between the first gear and the second gear, the rotation speed of the second gear can be much greater than the first gear, thereby allowing the reciprocating screw to rotate quickly, driving the two sliders to slide closer to and away from each other on the inner wall of the slide groove, thereby driving the two L-shaped plates to move relative to each other, driving multiple brushes to move to clean the surface of the printing plate, and cleaning the pollutants attached to the surface of the printing plate to prevent the pollutants from affecting the printing quality of the printing plate;

[0024] 5. By setting up a dust suction mechanism, when the L-shaped plate moves back and forth, it will repeatedly squeeze and stretch the second airbag, and then the second airbag will generate suction force, so that the dust on the surface of the printing plate is sucked into the dust suction chamber through the dust suction hole, and then the dust in the dust suction chamber will be sucked into the second airbag through the one-way dust suction pipe, and then the dust will be discharged into the external dust collection device through the one-way dust exhaust pipe, and then the dust on the surface of the printing plate can be sucked away, further improving the cleaning effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional structural schematic diagram of a plate-feeding and pressing wheel mechanism of a direct-to-plate (CTP) machine proposed by the present invention;

[0026] Figure 2 for Figure 1 A schematic cross-sectional view of the structure;

[0027] Figure 3 for Figure 2 Schematic diagram of the three-dimensional structure of the middle pressure wheel and the Z-shaped block;

[0028] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of the middle Z-shaped block;

[0029] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure of the middle L-shaped plate;

[0030] Figure 6 for Figure 2 Schematic diagram of the cross-sectional structure of the middle distance measuring roller and the semicircular block;

[0031] Figure 7 for Figure 2 A schematic diagram of the structure enlargement at point A;

[0032] Figure 8 for Figure 6 Schematic diagram of the enlarged structure at point B in FIG.

[0033] In the figure: 1, mounting seat; 2, adjusting cylinder; 3, sliding plug; 4, connecting rod; 5, mounting frame; 6, rotating shaft; 7, pressure wheel; 8, vertical cylinder; 9, sliding plate; 10, vertical rod; 11, U-shaped frame; 12, distance measuring roller; 13, first spring; 14, connecting pipe; 15, cavity; 16, conductive sliding plate; 17, sliding rod; 18, semicircular block; 19, second spring; 20, alarm; 21, annular conductive plate ; 22. Ink cavity; 23. Ink jet hole; 24. First air bag; 25. One-way ink supply tube; 26. One-way ink inlet tube; 27. Z-shaped block; 28. Slide groove; 29. ​​Slider; 30. L-shaped plate; 31. Bristles; 32. Reciprocating screw; 33. First gear; 34. Second gear; 35. Dust suction cavity; 36. Dust suction hole; 37. Second air bag; 38. One-way dust suction tube; 39. One-way dust exhaust tube. DETAILED DESCRIPTION

[0034] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0035] Reference Figure 1 - Figure 8 , a plate feeding and pressing wheel mechanism of a direct to plate machine (CTP), comprising a mounting seat 1;

[0036] The pressing wheel mechanism includes an adjusting cylinder 2 fixedly connected to the lower end of the mounting seat 1, a sliding plug 3 is sealingly and slidably connected to the inner wall of the adjusting cylinder 2, a connecting rod 4 is fixedly connected to the lower end of the sliding plug 3, the lower end of the connecting rod 4 passes through the lower end of the adjusting cylinder 2 and is fixedly connected to the mounting frame 5, the inner wall of the mounting frame 5 is rotatably connected to the rotating shaft 6, and the side wall of the rotating shaft 6 is fixedly connected to the pressing wheel 7, the lower end of the mounting seat 1 is fixedly connected to the vertical cylinder 8, the inner wall of the vertical cylinder 8 is sealingly and slidably connected to the sliding plate 9, the lower end of the sliding plate 9 is fixedly connected to the vertical rod 10, the lower end of the vertical rod 10 passes through the lower end of the vertical cylinder 8 and is fixedly connected to the U-shaped frame 11, the inner wall of the U-shaped frame 11 is fixedly connected to the distance measuring roller 12, and the side wall of the vertical rod 10 is sleeved with a first spring 13 (such as Figure 7 As shown in the figure, the two ends of the first spring 13 are fixedly connected to the lower end of the slide 9 and the bottom of the vertical cylinder 8 respectively. The vertical cylinder 8 is connected to the adjustment cylinder 2 through a connecting pipe 14. An electromagnetic valve is installed on the inner wall of the connecting pipe 14. It should be noted that the end of the connecting pipe 14 connected to the vertical cylinder 8 is located below the slide 9, and the end of the connecting pipe 14 connected to the adjustment cylinder 2 is located above the sliding plug 3. A cavity 15 (as shown in the figure) is opened in the distance measuring roller 12 Figure 8As shown), the inner wall of the cavity 15 is sealed and slidably connected with a conductive slide plate 16, the lower end of the conductive slide plate 16 is fixedly connected with a slide rod 17, the lower end of the slide rod 17 passes through the lower end of the distance measuring roller 12 and is fixedly connected with a semicircular block 18;

[0037] An alarm 20 is fixedly connected to the side wall of the mounting base 1, an annular conductive plate 21 is embedded in the inner wall of the cavity 15, and the conductive slide plate 16, the alarm 20, the annular conductive plate 21 and an external power source are electrically connected through wires.

[0038] Furthermore, when the printing plate moves to below the pressure wheel 7, the solenoid valve on the inner wall of the connecting tube 14 is powered off and closed, and ventilation cannot be performed. The height of the pressure wheel 7 cannot be changed, and the slide plate 9 cannot continue to move upward or downward. When the protrusion on the surface of the printing plate moves to the semicircular block 18, it will squeeze the semicircular block 18. At this time, the semicircular block 18 will drive the conductive slide plate 16 to move upward through the slide rod 17. When the protrusion is large, the conductive slide plate 16 moves upward until it contacts the annular conductive plate 21. The circuit is connected, and the alarm 20 will sound to remind the staff that there is a quality problem with the protrusion on the surface of the printing plate, which is convenient for timely processing.

[0039] It should be noted that the inner space of the regulating cylinder 2 and the inner space of the vertical cylinder 8 are of the same shape and size, and thus the sliding block 3 can be driven to move the same distance as the sliding block 9 moves.

[0040] The pressing wheel mechanism also includes a second spring 19 sleeved on the side wall of the slide rod 17, and the two ends of the second spring 19 are respectively fixedly connected to the lower end of the conductive slide plate 16 and the bottom of the cavity 15. The stiffness coefficient of the second spring 19 is greater than the stiffness coefficient of the first spring 13. Therefore, when the slide plate 9 cannot continue to slide, the semicircular block 18 can drive the conductive slide plate 16 to slide upward through the slide rod 17, so that the second spring 19 is stretched.

[0041] Furthermore, the printing plate will pass under the semicircular block 18 and the pressure wheel 7 in sequence through an external propulsion device. When the printing plate passes under the semicircular block 18, the semicircular block 18 will be lifted up by the printing plate, thereby driving the distance measuring roller 12 to move upward, driving the U-shaped frame 11 to move upward, driving the vertical rod 10 to move upward, and driving the slide plate 9 to slide upward, so that the air in the regulating cylinder 2 will be drawn into the vertical cylinder 8 through the connecting pipe 14, thereby causing the sliding plug 3 to move upward, and the sliding plug 3 will drive the mounting frame 5 to move upward through the connecting rod 4, thereby driving the pressure wheel 7 to move upward, and the height of the pressure wheel 7 can be automatically adjusted. When the thickness of the printing plate is thicker, the height of the slide plate 9 will be higher, and then the height of the sliding plug 3 will be higher, making the height of the pressure wheel 7 higher. On the contrary, the thinner the thickness of the printing plate, the lower the height of the pressure wheel 7 will be, so that the pressure wheel 7 can automatically adjust its height according to the thickness of the printing plate. Compared with manual adjustment, it is more accurate and more convenient to use.

[0042] It is worth mentioning that when the printing plate moves to below the semicircular block 18, the semicircular block 18 will give a certain pressure to the printing plate under the action of the first spring 13, pre-tighten the printing plate, and further improve the stability of the printing plate during plate making.

[0043] A marking mechanism is installed in the semicircular block 18, and the marking mechanism includes an ink cavity 22 opened in the semicircular block 18, and a plurality of inkjet holes 23 are opened on the inner wall of the ink cavity 22. A first air bag 24 is fixedly connected between the conductive slide plate 16 and the top of the cavity 15, and a one-way ink inlet tube 26 is fixedly connected to the side wall of the first air bag 24. The other end of the one-way ink inlet tube 26 is connected to an external container storing colored ink, and the colored ink is quick-drying ink, which will solidify quickly after application. The one-way ink inlet tube 26 only allows the external colored ink to enter the first air bag 24, and the first air bag 24 is connected to the ink cavity 22 through the one-way ink supply tube 25. The one-way ink supply tube 25 only allows the colored ink in the first air bag 24 to enter the ink cavity 22, and the one-way ink supply tube 25 and the one-way ink inlet tube 26 are both made of hoses.

[0044] Furthermore, when the conductive slide plate 16 moves upward, it will squeeze the first air bag 24, and the colored ink in the first air bag 24 will be squeezed into the ink cavity 22 through the one-way ink supply tube 25, and then the colored ink in the ink cavity 22 will be sprayed out through multiple inkjet holes 23 and sprayed onto the surface of the printing plate, forming an intermittent linear ink dot on the surface of the printing plate, which is convenient for the staff to quickly locate the protrusions of the printing plate, thereby facilitating quick repairs and saving time.

[0045] A cleaning mechanism is installed on the mounting frame 5, and the cleaning mechanism includes a Z-shaped block 27 fixedly connected to the inner wall of the mounting frame 5, a slide groove 28 is provided at the lower end of the Z-shaped block 27, and two sliders 29 are symmetrically slidably connected to the inner wall of the slide groove 28, and the side walls of the two sliders 29 are fixedly connected to L-shaped plates 30, and a plurality of bristles 31 are fixedly connected to the lower end of the L-shaped plate 30.

[0046] The cleaning mechanism also includes two reciprocating screws 32 symmetrically rotatably connected to the inner wall of the slide groove 28. The side walls of the two reciprocating screws 32 are respectively threadedly connected to the two sliders 29, and the two reciprocating screws 32 are fixedly connected. The side wall of the rotating shaft 6 is fixedly connected to a first gear 33, one end of one of the reciprocating screws 32 passes through the side wall of the Z-block 27 and is fixedly connected to a second gear 34, and the first gear 33 is meshed with the second gear 34.

[0047] Furthermore, when the printing plate is made under the pressure given by the pressure wheel 7, due to the friction between the pressure wheel 7 and the printing plate, the pressure wheel 7 will rotate, thereby driving the rotating shaft 6 to rotate, driving the first gear 33 to rotate, and then driving the second gear 34 to rotate. By adjusting the transmission ratio between the first gear 33 and the second gear 34, the rotation speed of the second gear 34 can be much greater than the first gear 33, so that the reciprocating screw 32 can rotate quickly, driving the two sliders 29 to slide towards and away from each other on the inner wall of the slide groove 28, and then driving the two L-shaped plates 30 to move relative to each other, driving the multiple bristles 31 to move to clean the surface of the printing plate, and remove the pollutants attached to the surface of the printing plate to prevent the pollutants from affecting the printing quality of the printing plate.

[0048] A dust suction mechanism is installed in the L-shaped plate 30, and the dust suction mechanism includes a dust suction chamber 35 opened in the L-shaped plate 30, and a plurality of dust suction holes 36 are opened on the inner wall of the dust suction chamber 35. A second air bag 37 is fixedly connected between the L-shaped plate 30 and the Z-shaped block 27. The second air bag 37 is connected to the dust suction chamber 35 through a one-way dust suction pipe 38. The one-way dust suction pipe 38 only allows dust in the dust suction chamber 35 to enter the second air bag 37. A one-way dust exhaust pipe 39 is fixedly connected to the side wall of the second air bag 37. The other end of the one-way dust exhaust pipe 39 is connected to an external dust collection device, and the one-way dust suction pipe 38 and the one-way dust exhaust pipe 39 are both made of hoses.

[0049] Furthermore, when the L-shaped plate 30 moves back and forth, it will repeatedly squeeze and stretch the second airbag 37, and then the second airbag 37 will generate a suction force, so that the dust on the surface of the printing plate is sucked into the dust suction chamber 35 through the dust suction hole 36, and then the dust in the dust suction chamber 35 will be sucked into the second airbag 37 through the one-way dust suction pipe 38, and then the dust will be discharged into the external dust collection device through the one-way dust exhaust pipe 39, and then the dust on the surface of the printing plate can be sucked away, further improving the cleaning effect.

[0050] The mounting base 1 is fixedly mounted to the plate-making machine body by a plurality of bolts.

[0051] In the present invention, the mounting base 1 is mounted on the direct platemaking machine by using bolts, and then the solenoid valve on the inner wall of the connecting pipe 14 is energized to open it, and the printing plate passes under the semicircular block 18 and the pressure wheel 7 in sequence through the external propulsion device. When the printing plate passes under the semicircular block 18, the semicircular block 18 is pushed up by the printing plate, thereby driving the distance measuring roller 12 to move upward, driving the U-shaped frame 11 to move upward, driving the vertical rod 10 to move upward, and driving the slide plate 9 to slide upward, so that the air in the regulating cylinder 2 is sucked into the vertical cylinder 8 through the connecting pipe 14, thereby causing the sliding plug 3 to move upward. When the plate is moved upward, the slide plug 3 will drive the mounting frame 5 to move upward through the connecting rod 4, thereby driving the pressure wheel 7 to move upward, and the height of the pressure wheel 7 can be automatically adjusted. When the thickness of the printing plate is thicker, the height of the slide plate 9 will be higher, and then the height of the slide plug 3 will be higher, so that the height of the pressure wheel 7 is higher. On the contrary, the thinner the thickness of the printing plate, the lower the height of the pressure wheel 7 will be, so that the pressure wheel 7 can automatically adjust its height according to the thickness of the printing plate. Compared with manual adjustment, it is more accurate and more convenient to use. After the height of the pressure wheel 7 is adjusted, the solenoid valve on the inner wall of the connecting pipe 14 is powered off and closed.

[0052] When the printing plate is made under the pressure given by the pressure wheel 7, due to the friction between the pressure wheel 7 and the printing plate, the pressure wheel 7 will rotate, thereby driving the rotating shaft 6 to rotate, driving the first gear 33 to rotate, and then driving the second gear 34 to rotate. By adjusting the transmission ratio between the first gear 33 and the second gear 34, the rotation speed of the second gear 34 can be much greater than the first gear 33, so that the reciprocating screw 32 can rotate quickly, driving the two sliders 29 to slide towards and away from each other on the inner wall of the slide groove 28, and then driving the two L-shaped plates 30 to move relative to each other, driving multiple bristles 31 to move to clean the surface of the printing plate, and remove the pollutants attached to the surface of the printing plate to prevent the pollutants from affecting the printing quality of the printing plate.

[0053] In addition, when the L-shaped plate 30 moves back and forth, it will repeatedly squeeze and stretch the second airbag 37, and then the second airbag 37 will generate a suction force, so that the dust on the surface of the printing plate is sucked into the dust suction chamber 35 through the dust suction hole 36, and then the dust in the dust suction chamber 35 will be sucked into the second airbag 37 through the one-way dust suction pipe 38, and then the dust will be discharged into the external dust collection device through the one-way dust exhaust pipe 39, and then the dust on the surface of the printing plate can be sucked away, further improving the cleaning effect.

[0054] When the printing plate moves to below the pressure wheel 7, the pressure wheel 7 cannot move downward any further, and the solenoid valve on the inner wall of the connecting pipe 14 is powered off and closed, so ventilation cannot be performed, and the height of the pressure wheel 7 cannot be changed. As a result, the slide plate 9 cannot move upward or downward any further. When the protrusion on the surface of the printing plate moves to the semicircular block 18, it will squeeze the semicircular block 18. At this time, the semicircular block 18 will drive the conductive slide plate 16 to move upward through the slide rod 17. When the protrusion is large, the conductive slide plate 16 will move upward until it contacts the annular conductive plate 21. The circuit is connected, and the alarm 20 will sound, reminding the staff that there is a quality problem with the protrusion on the surface of the printing plate.

[0055] During the upward movement of the conductive slide plate 16, the first air bag 24 will be squeezed, and the colored ink in the first air bag 24 will be squeezed into the ink cavity 22 through the one-way ink supply tube 25, and then the colored ink in the ink cavity 22 will be sprayed out through multiple inkjet holes 23 and sprayed onto the surface of the printing plate, forming an intermittent linear ink dot on the surface of the printing plate. At this time, the staff can choose to stop the machine to take out the printing plate, and then quickly find the raised position according to the ink dots, repair the printing plate and then make the plate, or wait for the plate making of the printing plate to be completed, and then quickly find the raised part according to the ink dots for repair.

[0056] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A plate feeding and pressing wheel mechanism of a direct to plate machine (CTP), characterized in that: include: Mounting seat (1); A pressure wheel mechanism, the pressure wheel mechanism comprising an adjustment cylinder (2) fixedly connected to the lower end of a mounting seat (1), the inner wall of the adjustment cylinder (2) being sealingly and slidably connected to a sliding plug (3), the lower end of the sliding plug (3) being fixedly connected to a connecting rod (4), the lower end of the connecting rod (4) passing through the lower end of the adjustment cylinder (2) and being fixedly connected to a mounting frame (5), the inner wall of the mounting frame (5) being rotatably connected to a rotating shaft (6), the side wall of the rotating shaft (6) being fixedly connected to a pressure wheel (7), the lower end of the mounting seat (1) being fixedly connected to a vertical cylinder (8), the inner wall of the vertical cylinder (8) being sealingly and slidably connected to a sliding plate (9), the lower end of the sliding plate (9) being fixedly connected to a vertical rod (10), the lower end of the vertical rod (10) passing through the lower end of the vertical cylinder (8) and being fixedly connected A U-shaped frame (11) is provided, the inner wall of the U-shaped frame (11) is fixedly connected to a distance measuring roller (12), the side wall of the vertical rod (10) is sleeved with a first spring (13), the two ends of the first spring (13) are respectively fixedly connected to the lower end of the slide plate (9) and the inner bottom of the vertical cylinder (8), the vertical cylinder (8) is connected to the adjustment cylinder (2) through a connecting pipe (14), the inner wall of the connecting pipe (14) is equipped with a solenoid valve, a cavity (15) is provided in the distance measuring roller (12), the inner wall of the cavity (15) is sealed and slidably connected to a conductive slide plate (16), the lower end of the conductive slide plate (16) is fixedly connected to a slide rod (17), the lower end of the slide rod (17) passes through the lower end of the distance measuring roller (12) and is fixedly connected to a semicircular block (18); An alarm (20) is fixedly connected to the side wall of the mounting seat (1), an annular conductive plate (21) is embedded in the inner wall of the cavity (15), and the conductive slide plate (16), the alarm (20), the annular conductive plate (21) and an external power source are electrically connected via wires; The pressing wheel mechanism further comprises a second spring (19) sleeved on the side wall of the slide rod (17), the two ends of the second spring (19) being fixedly connected to the lower end of the conductive slide plate (16) and the bottom of the cavity (15) respectively, and the stiffness coefficient of the second spring (19) is greater than the stiffness coefficient of the first spring (13); A marking mechanism is installed in the semicircular block (18), and the marking mechanism comprises an ink cavity (22) opened in the semicircular block (18), and a plurality of ink jet holes (23) are opened on the inner wall of the ink cavity (22); a first air bag (24) is fixedly connected between the conductive slide plate (16) and the top of the cavity (15); a one-way ink supply tube (26) is fixedly connected to the side wall of the first air bag (24); and the first air bag (24) is connected to the ink cavity (22) via the one-way ink supply tube (25).

2. A plate-feeding and pressing wheel mechanism for a CTP machine according to claim 1, characterized in that: in: A cleaning mechanism is mounted on the mounting frame (5), the cleaning mechanism comprising a Z-shaped block (27) fixedly connected to the inner wall of the mounting frame (5), a slide groove (28) being provided at the lower end of the Z-shaped block (27), two sliders (29) being symmetrically slidably connected to the inner wall of the slide groove (28), the side walls of the two sliders (29) being fixedly connected to an L-shaped plate (30), and a plurality of bristles (31) being fixedly connected to the lower end of the L-shaped plate (30).

3. The plate feeding and pressing wheel mechanism of a CTP machine according to claim 2, characterized in that: in: The cleaning mechanism further comprises two reciprocating screws (32) symmetrically rotatably connected to the inner wall of the slide groove (28), the side walls of the two reciprocating screws (32) being respectively threadedly connected to the two sliders (29), and the two reciprocating screws (32) being fixedly connected to each other, the side wall of the rotating shaft (6) being fixedly connected to a first gear (33), one end of one of the reciprocating screws (32) passing through the side wall of the Z-shaped block (27) and being fixedly connected to a second gear (34), and the first gear (33) and the second gear (34) being meshingly connected.

4. The plate feeding and pressing wheel mechanism of a direct to plate machine (CTP) according to claim 3, characterized in that: in: A dust suction mechanism is installed in the L-shaped plate (30), the dust suction mechanism comprising a dust suction chamber (35) provided in the L-shaped plate (30), a plurality of dust suction holes (36) being provided on the inner wall of the dust suction chamber (35), a second air bag (37) being fixedly connected between the L-shaped plate (30) and the Z-shaped block (27), the second air bag (37) being connected to the dust suction chamber (35) via a one-way dust suction pipe (38), and a one-way dust exhaust pipe (39) being fixedly connected to the side wall of the second air bag (37).

5. The plate feeding and pressing wheel mechanism of a direct to plate machine (CTP) according to claim 4, characterized in that: in: The mounting seat (1) is fixedly mounted to the plate-making machine body via a plurality of bolts.

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