A jumping knife test mechanism for a printing press plate cylinder

Abstract

This application relates to a jumping knife test mechanism for a printing press plate cylinder, which includes a bracket. The bracket is provided with a blade pressure detection component and a shaft heartbeat detection component. The blade pressure detection component includes a blade plate and a pressure adjustment module arranged at the bottom of the blade plate. The blade plate is rotatably connected to the bracket. The working end of the blade plate abuts against the plate cylinder and the blade plate is arranged obliquely downward. The height of the working end of the blade plate is higher than the central axis of the plate cylinder. The pressure adjustment module is slidably connected to the bracket. This application has the effect of improving the detection accuracy of the jumping knife of the plate cylinder.

Description

Technical Field

[0001] The present application relates to the field of printing, and particularly to a skipping knife test mechanism for a printing press plate cylinder. Background Art

[0002] The skipping knife test of a printing press is a quality inspection method carried out during the printing process, which can check whether there is a skipping knife phenomenon in the printed matter. The so-called skipping knife means that during the printing process, due to the eccentricity of the plate cylinder, there is poor contact between the plate cylinder and the printing material, resulting in some patterns or characters not being printed normally; or due to a large angle of the doctor blade, the doctor blade pressure is too large, resulting in horizontal stripes of different depths on the printing material.

[0003] The existing skipping knife test method is to first start the printing press and run it, and then feel the vibration of the doctor blade by hand in the state of adding ink to observe the skipping knife situation. Or to check whether the contact between the plate cylinder and the printing material is uniform, and observe whether the printed pattern or characters are clear through trial printing.

[0004] However, this method can only be clearly judged when the skipping knife phenomenon is serious. When there is a slight skipping knife phenomenon, it cannot be directly judged by the vibration of the doctor blade or the depth of the printed pattern or characters. Therefore, a skipping knife test mechanism with higher detection accuracy is needed. Summary of the Invention

[0005] In order to improve the detection accuracy of the skipping knife of the plate cylinder, the present application provides a skipping knife test mechanism for a printing press plate cylinder.

[0006] The skipping knife test mechanism for a printing press plate cylinder provided by the present application adopts the following technical solution:

[0007] A skipping knife test mechanism for a printing press plate cylinder includes a bracket. The bracket is provided with a doctor blade pressure detection component. The doctor blade pressure detection component includes a doctor blade plate and a pressure adjustment module arranged at the bottom of the doctor blade plate. The doctor blade plate is rotatably connected to the bracket. The working end of the doctor blade plate abuts against the plate cylinder. The height of the working end of the doctor blade plate is higher than the central axis of the plate cylinder. The pressure adjustment module is slidably connected to the bracket.

[0008] By adopting the above technical solution, the bracket is used to support the doctor blade pressure detection component and the shaft eccentricity detection component to avoid suspension. The working end of the doctor blade plate abuts against the plate cylinder, and when the plate cylinder rotates, the remaining ink on the plate cylinder can be scraped off. By judging the remaining amount of ink on the doctor blade plate, the pressure bias of the doctor blade can be judged, and then the position of the doctor blade can be adjusted to enable the doctor blade to have a uniform pressure on each position where it abuts against the plate cylinder, thereby reducing the appearance of horizontal stripes of different depths on the printing material. The pressure adjustment module can adjust the pressure of the doctor blade plate abutting against the plate cylinder, which can improve the detection accuracy of the skipping knife of the plate cylinder.

[0009] Optionally, the bracket is threadedly connected with a rotating member, the rotating member is rotatably provided with a connecting member, the pressure adjusting module includes an elastic member and a connecting plate fixedly connected to the elastic member, the elastic member is fixedly connected to the scraping plate, and the end of the connecting plate is connected to the connecting member through a connecting module. When the rotating member rotates, it forces the connecting plate to move in the direction of the axis of the bracket.

[0010] By adopting the above technical solution, the rotating member moves on the bracket in a rotating manner. Since the thread has a self-locking function, after being connected to the connecting plate through the connecting member on one side, the connecting plate will not pull the rotating member to move under the action of the elastic member. Instead, the rotation of the rotating member enables the connecting plate to slide relative to the bracket, and the connecting member can rotate relative to the rotating member. Therefore, when the connecting member is connected to the connecting plate and the rotating member is rotated, it will not affect the connection between the connecting member and the connecting plate. The connecting module can connect the connecting plate and the connecting member to improve the connection stability effect.

[0011] Optionally, the connecting module includes a connecting protrusion, the connecting protrusion is fixedly arranged on the upper part of the connecting plate, and a connecting hole adapted to the connecting protrusion is opened in the lower part of the connecting member.

[0012] By adopting the above technical solution, the connecting protrusion is located on the upper part of the connecting plate, and the connecting hole is opened in the lower part of the connecting member. Therefore, when the connecting plate is connected to the connecting member, the connecting plate is located below the connecting member and then the connecting protrusion is inserted into the connecting hole for connection. In this way, the connecting member can press the connecting plate, rotate the rotating member to make the connecting plate move downward, and the elastic member will pull the scraping plate to make the working end of the scraping plate further press against the plate cylinder, so that the scraping plate can scrape and observe the remaining ink on the plate cylinder. On the one hand, it can reduce the accumulation of ink on the plate cylinder, and on the other hand, it can determine whether the pressure of the scraping knife against the plate cylinder is uniform by observing the remaining amount of ink.

[0013] Optionally, the bracket is further provided with a shaft heartbeat detection component, the shaft heartbeat detection component includes a support rod and a transmission rod rotatable relative to the support rod. One end of the support rod is fixedly connected to the bracket, and the other end is a support end for supporting the transmission rod. The support end of the support rod extends close to the rotating shaft of the plate cylinder. The support end of the support rod is provided with a height adjustment module, the height adjustment module is rotatably connected to the transmission rod. The transmission rod has a long end and a short end. The short end of the transmission rod abuts against the rotating shaft of the plate cylinder, and the long end of the transmission rod extends towards the bracket direction. The bracket has a scale.

[0014] By adopting the above technical solution, the support rod is used to support the transmission rod, and because the support end of the support rod is close to the rotating shaft of the plate roller, the rotation center of the transmission rod can also be closer to the rotating shaft of the plate roller. This method allows the long end to swing more when the short end swings due to the vibration of the rotating shaft of the plate roller, so that the vibration of the rotating shaft can be observed more conveniently. According to the swing amplitude of the long end of the transmission rod, and then compared with the scale on the scale, the user can judge whether the vibration of the rotating shaft of the plate roller is within the appropriate range. The height adjustment module can adjust the position of the rotation center of the transmission rod relative to the rotating shaft of the plate roller. The axis vibration detection component can detect the vibration caused by the position deviation of the rotating shaft of the plate roller when the plate roller rotates, without the user having to sense the vibration of the plate roller by hand contact.

[0015] Optionally, the height adjustment module includes an adjusting piece and an adjusting block, the supporting end of the support rod is provided with an adjusting groove for accommodating the adjusting block, the adjusting piece passes through the supporting end of the support rod and is threadedly connected to the adjusting block, and when the adjusting piece rotates, the adjusting block is forced to move relative to the adjusting groove, and the adjusting block is rotatably connected to the transmission rod.

[0016] By adopting the above technical scheme, the adjusting member is used to control the moving position of the adjusting block in the adjusting groove. Since the transmission rod is rotatably connected to the adjusting block, the adjusting member can adjust the position of the rotation center of the rotating rod. Since the short end of the rotating rod is in contact with the rotating shaft of the plate roller, the inclination of the short end of the rotating rod can be adjusted by adjusting the rotation center of the rotating rod. Since the vibration of the rotating shaft of the plate roller often jumps up and down, the short end of the rotating rod is adjusted to a roughly horizontal state. At this time, the vibration of the rotating shaft of the plate roller will be more accurately transmitted to the short end, so that the swing of the short end can more accurately test the vibration of the rotating shaft of the printing roller, and then amplify it through the swing of the long end, so that the user can finally observe it conveniently.

[0017] Optionally, a sliding groove is provided inside the bracket, a marking piece is slidably provided in the sliding groove, the sliding groove is connected to the marking groove, the marking piece has a marking protrusion, the marking protrusion passes through the marking groove and extends to the outside of the bracket, the long end of the transmission rod abuts against the marking protrusion and is used to push the marking protrusion to slide along the length direction of the marking groove, when the rotating part moves toward the direction of the marking piece, it has a tendency to increase the friction resistance of the side wall of the sliding groove to the marking piece, and the bracket is also provided with an amplifying reading module, and the input shaft of the amplifying reading module is engaged with the marking piece.

[0018] By adopting the above technical solution, the sliding groove is used to accommodate the marking member, the marking groove provides a displacement space for the marking protrusion. When the long end of the transmission rod swings, it will push the marking protrusion, causing the marking member to move within the sliding groove. The rotating member rotates downward along the bracket. On the one hand, it can make the connecting plate pull the elastic member, enabling the working end of the scraping blade to better abut against the plate roller. On the other hand, it can push the sliding groove by means of clamping, causing the sliding groove to slightly deform in the direction of the marking member, thereby increasing the frictional resistance to the marking member. In this way, after the long end of the transmission rod pushes the marking member to move within the sliding groove through the marking protrusion, the marking member will remain stationary under the frictional force of the sliding groove, so that the marking protrusion can be located at the highest position where the long end of the transmission rod swings. The user can test the maximum range of the runout of the rotating shaft of the plate roller by observing the relative position between the marking member and the scale.

[0019] Optionally, the magnification reading module includes a reading rod and a scale disk. The scale disk is fixedly arranged on the bracket. The reading rod is rotatably arranged on the bracket and one end thereof passes through the scale disk. A pointing needle is fixedly arranged at one end of the reading rod passing through the scale disk. When the marking member slides within the sliding groove, it drives the reading rod to rotate.

[0020] By adopting the above technical solution, the magnification reading module can further improve the reading accuracy. When the marking member moves, it can push the reading rod to rotate. When the reading rod rotates, it can make the pointing needle rotate. Since a short-distance sliding of the marking member can push the reading rod to rotate and make the pointing needle rotate, the range of the plate roller's jumping knife can be tested more accurately.

[0021] Optionally, there are two shaft runout detection components, and the two shaft runout detection components are respectively used to detect the rotating shafts at both ends of the plate roller.

[0022] By adopting the above technical solution, the two shaft runout detection components can respectively detect the runout ranges of the rotating shafts at both ends of the plate roller, and can more accurately determine the position where the plate roller has a jumping knife problem.

[0023] Optionally, the scraping blade is further provided with a disassembly groove, and the scraping blade is snap-connected to the bracket through the disassembly groove.

[0024] By adopting the above technical solution, when a jumping knife test is required, the scraping blade can be rotatably connected to the bracket through the disassembly groove. When the test is not needed, the scraping blade can be disassembled. At this time, only need to slide the bracket and the scraping blade along the length direction of the disassembly groove, and then separate the two. Then push the connecting rod downward to disengage the connecting protrusion from the connecting hole, thereby realizing the overall disassembly of the scraping blade, which can facilitate the cleaning of the ink left on the scraping blade.

[0025] Optionally, the scraping blade has an observation surface and a guiding surface connected to the observation surface.

[0026] By adopting the above technical solution, when the plate cylinder rolls, the ink that is not scraped clean on the surface of the plate cylinder will enter the position of the observation surface through the working end of the doctor blade. The user can determine by observing the position of the ink on the observation surface and the amount of accumulation. The guiding surface is located above the ink pool. When the ink accumulated on the observation surface is too much, the ink will fall into the ink pool through the guiding surface.

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

[0028] 1. The shaft heartbeat detection component can detect the beating generated by the position deviation of the rotating shaft of the plate cylinder when the plate cylinder rotates. There is no need for the user to sense the beating when the plate cylinder rolls by means of hand contact, which can improve the detection accuracy of the plate cylinder's jumping knife.

[0029] 2. In this way, when the short end swings due to the beating of the rotating shaft of the plate cylinder, the swinging amplitude of the long end will be greater, so that it is more convenient to observe the beating condition of the rotating shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic diagram of the installation position of this mechanism.

[0031] Figure 2 is a three-dimensional structure schematic diagram of this mechanism.

[0032] Figure 3 is a partial structure schematic diagram of this mechanism.

[0033] Figure 4 is an exploded structure schematic diagram of this mechanism.

[0034] Figure 5 is a schematic cross-sectional view in the axial direction of the sliding groove.

[0035] Figure 6 is a structure schematic diagram of the enlarged reading module.

[0036] Figure 7 is Figure 3 a partial position enlarged structure schematic diagram of

[0037] Figure 8 is Figure 4 an enlarged structure schematic diagram at position A of

[0038] Description of the reference numerals: 1. Bracket; 11. Rotating member; 12. Connecting member; 2. Scraper pressure detection assembly; 21. Scraper plate; 211. Demounting groove; 212. Observation surface; 213. Guide surface; 22. Pressure adjustment module; 221. Elastic member; 222. Connecting plate; 23. Connection module; 231. Connection protrusion; 232. Connection hole; 3. Shaft runout detection assembly; 31. Support rod; 311. Support end; 32. Transmission rod; 322. Long end; 321. Short end; 323. Relief groove; 33. Height adjustment module; 331. Adjusting member; 332. Adjusting block; 333. Adjusting groove; 334. Rotating pin; 34. Scale; 35. Sliding groove; 351. Marking groove; 36. Marking member; 361. Marking protrusion; 37. Magnifying reading module; 371. Reading rod; 372. Dial; 373. Pointer; 374. Transmission protrusion; 375. Transmission groove; 4. Printing press; 41. Plate cylinder; 42. Ink sump; 43. Doctor blade; 44. Rotating shaft. Detailed implementation manners

[0039] The upper, lower, left, right, front, rear, front side, back side, top, bottom and other orientation terms mentioned or possibly mentioned in this specification are defined relative to the structures shown in the respective drawings. They are relative concepts and may therefore change accordingly depending on their different positions and usage states. Therefore, these or other orientation terms should not be construed as restrictive terms. In addition, terms such as "first", "second", "third", etc. or similar expressions are only used for descriptive and differentiating purposes and cannot be understood as indicating or implying the relative importance of the corresponding components.

[0040] The following Figure 1 - Figure 8 further describes the present application in detail with reference to the

[0041] An embodiment of the present application discloses a jumping knife test mechanism for a plate cylinder of a printing press.

[0042] Refer to Figure 1 and Figure 2, A jump knife test mechanism for a printing press plate cylinder. The jump knife test mechanism is installed on a printing press 4, which includes a plate cylinder 41, an ink pool 42, and a doctor blade 43. The plate cylinder 41 has concave patterns or characters. The doctor blade 43 is arranged on one side of the plate cylinder 41 to scrape off the excess ink on the surface of the plate cylinder 41 and only leave the ink in the concave patterns or characters. Both ends of the plate cylinder 41 have rotating shafts 44, and the rotating shafts 44 extend into the frame of the printing press 4 and are driven to rotate by a motor. The jump knife test mechanism of the plate cylinder 41 of the printing press 4 includes brackets 1 fixedly arranged on the wall of the ink pool 42. There are two such brackets 1, and on each bracket 1, there is an axial runout detection component 3 for detecting the runout of the rotating shaft 44 of the plate cylinder 41. A doctor blade pressure detection component 2 is detachably arranged between the two brackets 1, and the doctor blade pressure detection component 2 is used to detect whether the pressure of the doctor blade 43 on the plate cylinder 41 is uniform.

[0043] The structures of the two axial runout detection components 3 are the same except for the installation positions. One is used to detect the runout of the rotating shaft 44 at one end of the plate cylinder 41, and the other is used to detect the runout of the rotating shaft 44 at the other end of the plate cylinder 41.

[0044] Refer to Figure 3 , The axial runout detection component 3 includes a support rod 31 and a height adjustment module 33. One end of the support rod 31 is fixedly connected to the bracket 1, and the other end is a support end 311. The support end 311 of the support rod 31 extends close to the rotating shaft 44 of the plate cylinder 41 (such as Figure 2 ). The height adjustment module 33 is arranged at the support end 311 of the support rod 31. An adjustment groove 333 is opened at the support end 311, and the opening of the adjustment groove 333 is downward. The height adjustment module 33 includes an adjustment part 331 and an adjustment block 332. The adjustment block 332 is slidably arranged in the adjustment groove 333. The adjustment part 331 is a nut with threads. The adjustment rod passes through the upper surface of the support end 311 of the support rod 31 and enters the adjustment groove 333, and the adjustment rod located in the adjustment groove 333 is threadedly connected to the adjustment block 332. By rotating the adjustment part 331, the adjustment block 332 can move up and down in the adjustment groove 333. The lower end of the adjustment block 332 is rotatably provided with a transmission rod 32 through a rotating pin 334. Taking the position where the transmission rod 32 rotates relative to the support rod 31 as the demarcation point, the transmission rod 32 has a long end 322 and a short end 321, and the length of the long end 322 is greater than the length of the short end 321. The short end 321 of the transmission rod 32 extends below the rotating shaft 44 of the plate cylinder 41, and the center of gravity of the transmission rod 32 is located at the long end 322 position, and the center of gravity of the transmission rod 32 will force the transmission rod 32 to rotate. During the rotation of the transmission rod 32, the upper surface of the short end 321 of the transmission rod 32 abuts against the rotating shaft 44 of the plate cylinder 41 (such as Figure 2). The up and down movement of the adjusting block 332 can adjust the height position of the rotating pin 334. By adjusting the height position of the rotating pin 334, the short end 321 of the transmission rod 32 can be made to be approximately horizontal. The long end 322 of the transmission rod 32 extends towards the bracket 1, and the bracket 1 is provided with a scale 34.

[0045] Referring to Figure 4 and Figure 5 , a relief groove 323 is provided in the long end 322 of the transmission rod 32. The bracket 1 can pass through the relief groove 323, so that the bracket 1 will not affect the rotation of the transmission rod 32. A sliding groove 35 is provided in the bracket 1 along the length direction of the axis of the bracket 1. A marking member 36 is slidably arranged in the sliding groove 35. The outer surface of the marking member 36 fits with the inner surface of the sliding groove 35, and the length of the marking member 36 is shorter than the length of the sliding groove 35. Therefore, the marking member 36 can slide along the length direction of the sliding groove 35. The bracket 1 is also provided with a sliding groove 35. The length direction of the sliding groove 35 is the same as the scale direction of the scale 34. A marking protrusion 361 is provided below the marking member 36. The marking protrusion 361 passes through the marking groove 351 and extends to the outside of the bracket 1. The marking protrusion 361 extending to the outside of the bracket 1 is higher than the long end 322 of the transmission rod 32. The same bracket 1 has two marking grooves 351, and each marking member 36 has two marking protrusions 361.

[0046] A rotating member 11 is threadedly connected to the outer surface of the bracket 1 above the sliding groove 35. When the rotating member 11 rotates towards the sliding groove 35, that is, rotates downward, the rotating member 11 will generate a thrust on the outer surface of the bracket 1, causing the bracket 1 to deform slightly inward, so that the side wall of the sliding groove 35 clamps the marking member 36, increasing the frictional resistance to the marking member 36. At this time, the marking member 36 can be pushed to slide in the sliding groove 35 by an external force, but the marking member 36 will not slide relative to the sliding groove 35 without an external force.

[0047] The short end 321 of the transmission rod 32 first abuts against the rotating shaft 44 of the plate roller 41, and then the position of the rotating pin 334 on the transmission rod 32 is controlled by rotating the adjusting member 331. As the position of the rotating pin 334 changes, the transmission rod 32 will also rotate to make the long end 322 of the transmission rod 32 swing. After adjusting the short end 321 of the transmission rod 32 to be approximately horizontal, the long end 322 of the transmission rod 32 will also abut against the lower part of the marking protrusion 361 of the marking member 36.

[0048] When the rotating shaft 44 jumps while the plate cylinder 41 is rolling, the rotating shaft 44 will push the short end 321 of the transmission rod 32 to turn over, and the long end 322 of the transmission rod 32 will also turn over in the opposite direction. And since the length of the long end 322 is greater than that of the short end 321, the amplitude of the end of the long end 322 turning over will become larger. During the turning over of the long end 322, it will push the marking protrusion 361, causing the marking protrusion 361 to slide relative to the scale 34. Under the external force of the long end 322 of the rotating rod, the marking member 36 is pushed. When the marking member 36 stops at one position in the sliding groove 35, by observing the position of the marking protrusion 361 relative to the scale 34, the jumping range of the rotating shaft 44 of the plate cylinder 41 is judged.

[0049] To further improve the observation of the jumping range of the rotating shaft 44 of the plate cylinder 41, a magnification reading module 37 is also provided on the two brackets 1. The input shaft of the magnification reading module 37 is rotationally connected to the marking member 36. The marking member 36 will drive the input shaft of the magnification reading module 37 during the movement; the structures of the two magnification reading modules 37 are the same, only the installation positions are different.

[0050] Refer to Figure 6 , the magnification reading module 37 includes a reading rod 371 and a scale disk 372. The scale disk 372 is fixedly arranged on the bracket 1 (such as Figure 4 ), the reading rod 371 is rotatably arranged on the bracket 1 and one end passes through the scale disk 372. A pointing needle 373 is fixedly arranged at one end of the reading rod 371 passing through the scale disk 372. When the marking member 36 slides in the sliding groove 35, it drives the reading rod 371 to rotate. The scale disk 372 is in a disk shape. With the reading rod 371 as the center, reading marks are engraved around the circumference of the scale disk 372. The end of the pointing needle 373 points to the reading marks. The reading rod 371 is provided with a transmission protrusion 374, and the marking member 36 is provided with a transmission groove 375 adapted to the transmission protrusion 374. During the sliding of the marking member 36, the reading rod 371 is pushed to rotate through the cooperation of the transmission groove 375 and the transmission protrusion 374. Since the marking member 36 only needs to displace a small distance to make the marking member 36 rotate one circle, the slight jumping data of the rotating shaft 44 of the plate cylinder 41 (such as Figure 2 ) can be observed through the reading in the scale disk 372. When the jumping of the rotating shaft 44 of the plate cylinder 41 (such as Figure 2 ) is slightly larger, the jumping data can be recorded by observing the reading on the scale 34 (such as Figure 4 ).

[0051] Refer to Figure 7, the blade pressure detection component 2 includes a blade plate 21 and a pressure adjustment module 22 arranged at the bottom of the blade plate 21. Disassembly grooves 211 are formed on both sides of the blade plate 21 close to the bracket 1. The upper part of the bracket 1 has a protrusion, and this protrusion penetrates into the disassembly grooves 211 to realize the connection between the bracket 1 and the blade plate 21. Moreover, the protrusion is cylindrical, enabling the blade plate 21 to be detachably and rotatably connected to the bracket 1.

[0052] The blade plate 21 has a working end. The working end of the blade plate 21 abuts against the plate cylinder 41, and the blade plate 21 is inclined downward with the working end as the top. And the height of the working end of the blade plate 21 is higher than the central axis of the plate cylinder 41. The pressure adjustment module 22 is detachably connected to the rotating member 11 of the bracket 1 through a connection module 23. After the pressure adjustment module 22 is connected to the rotating member 11, as the rotating member 11 rotates, the abutting force between the working end of the blade plate 21 and the plate cylinder 41 can be adjusted. The blade plate 21 has an observation surface 212 and a guiding surface 213 connected to the observation surface 212. The observation surface 212 is the upper part of the working end. When the plate cylinder 41 rolls, the ink that is not scraped clean on the surface of the plate cylinder 41 will enter the position of the observation surface 212 through the working end of the blade plate 21. The user can determine by observing the position of the ink and the size of the accumulated amount on the observation surface 212. The guiding surface 213 is located above the ink pool 42 (such as Figure 2 ), when the ink accumulated on the observation surface 212 is too much, the ink will fall into the ink pool 42 (such as Figure 2 ) through the guiding surface 213.

[0053] Refer to Figure 7 and Figure 8 , the pressure adjustment module 22 includes an elastic member 221 and a connecting plate 222 fixedly connected to the elastic member 221. The elastic member 221 is a tension spring. The connecting plate 222 is strip-shaped. There are multiple elastic members 221 and they are evenly arranged on the strip-shaped connecting plate 222. The upper end of the elastic member 221 is fixedly connected to the lower surface of the connecting plate 222, and the lower end is fixedly connected to the upper surface of the connecting plate 222. A connecting member 12 is rotatably arranged on the rotating member 11, and a connecting hole 232 is formed in the lower part of the connecting member 12. The connecting hole 232 in this embodiment communicates up and down. The connection module 23 includes a connection protrusion 231 adapted to the connecting hole 232. The connection protrusion 231 is fixedly arranged on the upper part of the connecting plate 222. After the connection protrusion 231 is connected to the connecting hole 232, the connecting member 12 will abut against the connecting plate 222. By rotating the rotating member 11, the connecting member 12 can control the connecting plate 222 to slide up and down relative to the bracket 1. The up and down sliding of the connecting plate 222 can adjust the tension of the elastic member 221. The magnitude of the tension of the elastic member 221 determines the force with which the working end of the blade plate 21 abuts against the plate cylinder 41 (such as Figure 2 ). Thus, the pressure adjustment of the blade plate 21 abutting against the plate cylinder 41 is realized.

[0054] The implementation principle of the embodiment is as follows: when the plate cylinder 41 rotates, the doctor blade 43 will first scrape the ink on the surface of the plate cylinder 41. When the blade angle of the doctor blade 43 is different, the doctor blade 43 cannot completely scrape off the ink on the plate cylinder 41. At this time, through the doctor blade plate 21, the ink that has not been completely scraped off on the plate cylinder 41 will be continuously scraped off. The scraped ink will enter the observation surface 212 for the user to observe. When the ink at one position of the observation surface 212 is excessive, it indicates that the pressure of the doctor blade 43 on the plate cylinder 41 at this position is relatively small, and skipping of the doctor blade is likely to occur at this position.

[0055] The above are all the preferred embodiments of the present application, and do not limit the protection scope of the present application in this way. Therefore, according to the technical solution of the present invention, without changing the essence of the present invention, those of ordinary skill in the art can propose various structural forms and implementation methods that can be mutually replaced. Therefore, the above specific implementation manners and the drawings are only exemplary descriptions of the technical solution of the present invention, and should not be regarded as the whole of the present invention or regarded as a limitation or restriction on the technical solution of the present invention. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A skipping knife test mechanism for a printing press plate cylinder, comprising a bracket (1), characterized in that: The bracket (1) is provided with a doctor blade pressure detection assembly (2). The doctor blade pressure detection assembly (2) includes a doctor blade plate (21) and a pressure adjustment module (22) disposed at the bottom of the doctor blade plate (21). The doctor blade plate (21) is rotatably connected to the bracket (1). The working end of the doctor blade plate (21) abuts against the plate cylinder (41). The height of the working end of the doctor blade plate (21) is higher than the central axis of the plate cylinder (41). The pressure adjustment module (22) is slidably connected to the bracket (1). The bracket (1) is threadedly connected with a rotating member (11). A connecting member (12) is rotatably disposed on the rotating member (11). The pressure adjustment module (22) includes an elastic member (221) and a connecting plate (222) fixedly connected to the elastic member (221). The elastic member (221) is fixedly connected to the doctor blade plate (21). The end of the connecting plate (222) is connected to the connecting member (12) through a connecting module (23). When the rotating member (11) rotates, it forces the connecting plate (222) to move in the axial direction of the bracket (1). The bracket (1) is further provided with a shaft heartbeat detection assembly (3). The shaft heartbeat detection assembly (3) includes a support rod (31) and a transmission rod (32) rotatable relative to the support rod (31). One end of the support rod (31) is fixedly connected to the bracket (1), and the other end is a support end (311) for supporting the transmission rod (32). The support end (311) of the support rod (31) extends close to the rotating shaft (44) of the plate cylinder (41). The support end (311) of the support rod (31) is provided with a height adjustment module (33). The height adjustment module (33) is rotatably connected to the transmission rod (32). The transmission rod (32) has a long end (322) and a short end (321). The short end (321) of the transmission rod (32) abuts against the rotating shaft (44) of the plate cylinder (41). The long end (322) of the transmission rod (32) extends towards the bracket (1). The bracket (1) is engraved with a scale table (34).

2. The jump knife test mechanism of a printing press plate cylinder according to claim 1, characterized in that: The connecting module (23) includes a connecting protrusion (231). The connecting protrusion (231) is fixedly disposed on the upper part of the connecting plate (222). A connecting hole (232) adapted to the connecting protrusion (231) is opened in the lower part of the connecting member (12).

3. The jump knife test mechanism for a printing press plate cylinder according to claim 2, characterized in that: The height adjustment module (33) includes an adjusting member (331) and an adjusting block (332). An adjusting groove (333) for accommodating the adjusting block (332) is opened at the support end (311) of the support rod (31). The adjusting member (331) passes through the support end (311) of the support rod (31) and is threadedly connected to the adjusting block (332). When the adjusting member (331) rotates, it forces the adjusting block (332) to move relative to the adjusting groove (333). The adjusting block (332) is rotatably connected to the transmission rod (32).

4. A jumping knife test mechanism for a printing press plate cylinder according to claim 3, characterized in that: The interior of the bracket (1) is provided with a sliding groove (35), a marking member (36) is slidably arranged in the sliding groove (35), the sliding groove (35) communicates with a marking groove (351), the marking member (36) has a marking protrusion (361), the marking protrusion (361) passes through the marking groove (351) and extends to the outside of the bracket (1), the long end (322) of the transmission rod (32) abuts against the marking protrusion (361) and is used to push the marking protrusion (361) to slide along the length direction of the marking groove (351), when the rotating member (11) moves towards the marking member (36), there is a tendency to increase the frictional resistance of the side wall of the sliding groove (35) to the marking member (36), and the bracket (1) is further provided with an amplified reading module (37), and the input shaft of the amplified reading module (37) is engaged with the marking member (36).

5. The skipping knife test mechanism of a printing press plate cylinder according to claim 4, characterized in that: The amplified reading module (37) includes a reading rod (371) and a scale disk (372), the scale disk (372) is fixedly arranged on the bracket (1), the reading rod (371) is rotatably arranged on the bracket (1) and one end thereof passes through the scale disk (372), a pointing needle (373) is fixedly arranged at one end of the reading rod (371) passing through the scale disk (372), and when the marking member (36) slides in the sliding groove (35), it drives the reading rod (371) to rotate.

6. A jumping knife test mechanism for a printing press plate cylinder according to any one of claims 1-5, characterized in that: There are two shaft heartbeat detection components (3), and the two shaft heartbeat detection components (3) are respectively used to detect the rotating shafts (44) at both ends of the plate cylinder (41).

7. A jumping knife test mechanism for a printing press plate cylinder according to any one of claims 1-5, characterized in that: The scraper plate (21) is further provided with a disassembly groove (211), and the scraper plate (21) is clamped to the bracket (1) through the disassembly groove (211).

8. A jumping knife test mechanism for a printing press plate cylinder according to any one of claims 1-5, characterized in that: The scraper plate (21) has an observation surface (212) and a guiding surface (213) connected to the observation surface (212).

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