Printing machine accessory installation precision detection device and method

Abstract

The invention discloses a printing machine accessory installation precision detection device and method, and belongs to the technical field of printing machine accessory detection, the printing machine accessory installation precision detection device comprises a working plate, a motor and a material box, the lower surface of the working plate is in threaded connection with a support, the interior of the working plate is fixedly connected with a limiting rod, and the working plate is symmetrically distributed about the center of the limiting rod; the motor is in bolted connection with the outer wall of the working plate on the left side; and the spray head is fixedly connected to the tail end of the inner connecting pipe of the vertical plate. When the printing machine accessory installation precision detection device works, printing machines provided with printing rollers are tidily placed in front of a detection high-definition probe, then a motor is started, when the motor works, an equipment box and the detection high-definition probe are driven to move in the horizontal direction through a threaded rod and a limiting rod, workpieces are detected, and when defective products are detected, the printing rollers are driven to move in the horizontal direction. And marking liquid is sprayed through the spray head to mark the defective products, so that the defective products can be conveniently treated by workers.

Description

Technical Field

[0001] The invention relates to the technical field of printing machine accessories detection, and in particular to a printing machine accessories installation accuracy detection device and method. Background Art

[0002] The main function of a printing press is to copy information such as text and images onto paper. Compared with manual printing, a printing press has the advantages of high efficiency and high quality. At the same time, the development of printing presses has also promoted the popularization of publications such as books, newspapers and magazines. During the processing of the printing press, it is necessary to detect the horizontal installation accuracy of the printing roller to ensure the printing quality of the printing press during use. Therefore, during the processing of the printing press, a printing roller level detection machine is needed; During the inspection process, when unqualified products are detected, the staff is required to remove their marks. If the defective products cannot be marked in time, they may be forgotten or missed, which will bring unnecessary trouble to the inspection process. In order to overcome the above defects, prior art 1 (Chinese patent with application number CN202211625059.0 and application date 2022-12-16) is a high-precision roadbed and pavement level detection device. When it detects that the ground is uneven, the motor rotates to drive the protrusion to rotate, and the protrusion squeezes the sealing plate, and the sealing plate drives the pulley to move inside the slide groove, and then the sealing plate squeezes the fixed spring, and the fixed hole on the top of the sealing plate moves between the inclined plates, and the water pump is started. The water pump draws out the paint in the storage box and sprays it onto the ground to achieve the marking function; There is also prior art 2 (application number is CN202211339989.X, application date is 2022-10-29 A Chinese patent) A slender shaft detection marking device, when working, it drives the marking pen to move and mark the workpiece; When workers are testing a large number of products, they may become fatigued. However, the device in the above application does not have a warning function during use. When workers are tired, they may lose concentration, resulting in omissions in the testing process.

[0003] In view of the above problems, it is urgent to carry out innovative design based on the original detection device. Summary of the invention

[0004] The purpose of the present invention is to provide a device and method for detecting the installation accuracy of printing machine accessories, so as to solve the problem proposed in the above background technology that there is no warning function during use, and when the staff is tired, they may lose concentration, resulting in omissions in the detection process.

[0005] To achieve the above object, the present invention provides the following technical solution: a device for detecting the installation accuracy of accessories of a printing machine, comprising a working plate, a motor and a material box, wherein a bracket is threadedly connected to the lower surface of the working plate, and a limiting rod is fixedly connected to the inside of the working plate, and the working plate is symmetrically distributed about the center of the limiting rod; The motor is bolted to the outer wall of the left working plate, and the output end of the motor is fixedly connected to a threaded rod, and the surface of the threaded rod is threadedly connected to an equipment box; The material box is fixedly connected to the upper surface of the equipment box, and a shifting block is movably arranged inside the material box, and the equipment box is sleeved and connected to the surface of the limit rod; Also includes: A high-definition detection probe, wherein the high-definition detection probe is bolted to the outer wall of the equipment box, and a warning light is fixedly connected to the outer surface of the other side of the equipment box, and the high-definition detection probe and the warning light are connected by electrical signals; A vertical plate, the vertical plate is fixedly connected to the upper surface of the equipment box, and the surface of the vertical plate is bonded with an air bag, and the surface of the vertical plate is fixedly connected with a limit strip; An extrusion plate, wherein the extrusion plate is slidably arranged on the surface of the limiting strip, and the surface of the extrusion plate is in contact with the surface of the airbag, and the upper surface of the airbag and the interior of the vertical plate are both fixedly connected with a connecting pipe; A nozzle, the nozzle being fixedly connected to the end of the internal connecting pipe of the vertical plate; A clicker is fixedly connected to the upper surface of the equipment box.

[0006] Preferably, the limiting strips are symmetrically distributed about the center of the extrusion plate, and the ends of the limiting strips are fixedly connected with baffles, and the adjacent connecting pipes are connected by threaded external hoses.

[0007] Preferably, a first one-way valve is fixedly connected to the surface of the connecting pipe, a connecting spring having an elastic reset function is fixedly connected to the surface of the extrusion plate, and the other side of the connecting spring is fixedly connected to the outer wall of the vertical plate.

[0008] Preferably, the surface of the airbag and the interior of the material box are both fixedly connected with auxiliary tubes, and adjacent auxiliary tubes are connected via a threaded external hose, and a second one-way valve is fixedly connected to the surface of the auxiliary tube.

[0009] Preferably, a long pin is fixedly connected to the outer wall of the extrusion plate, and the long pin is movably arranged inside the material box, and a push block is fixedly connected to the lower surface of the long pin.

[0010] Preferably, a transverse plate is fixedly connected to the inner wall of the material box, and vertical columns are slidably arranged inside the transverse plate, and an upper connecting block corresponding to the push block is fixedly connected to the upper surface of the vertical column, the left and right sides of the upper connecting block and the left and right sides of the push block are inclined, and the vertical columns are evenly spaced inside the transverse plate.

[0011] Preferably, the shifting blocks are distributed at equal intervals on the surface of the column, and a return spring having an elastic return function is fixedly connected to the lower surface of the column, and the other side of the return spring is fixedly connected to the inner wall of the material box.

[0012] Preferably, an outer frame is fixedly connected to the upper surface of the equipment box, and the outer frame is an inverted "U" shape when viewed from the left, and a knocking rod corresponding to the clicker is slidably provided inside the outer frame, and a second magnet is fixedly connected to the upper surface of the knocking rod, and a first magnet corresponding to the second magnet is fixedly connected to the upper surface of the long pin.

[0013] Preferably, the magnetic poles on the upper surface of the first magnet are opposite to the magnetic poles on the lower surface of the second magnet, the surface of the knocking rod is convex, and the upper surface of the knocking rod is fixedly connected to an auxiliary spring that plays an elastic reset role, and the other side of the auxiliary spring is fixedly connected to the lower surface of the outer frame.

[0014] A method for installing an accuracy detection device for a printing machine accessory comprises the following steps: S1: When working, the printing machine with the printing roller installed is neatly placed in front of the high-definition detection probe, and then the motor on the surface of the working plate is started. When the motor is working, the threaded rod and the limit rod drive the equipment box and the high-definition detection probe to move in the horizontal direction to detect the workpiece. When defective products are detected, the warning light is on. At this time, the staff pushes the extrusion plate to make the extrusion plate slide on the limit bar and press the airbag, and then the airbag feeds the nozzle through the connecting pipe, that is, the marking liquid is sprayed through the nozzle to mark the defective products, so that the defective products are convenient for the staff to handle them later. When the extrusion plate is pushed, the connecting spring will be squeezed, and after the extrusion plate is released, the connecting spring pushes the extrusion plate to reset, and the airbag expands again, and then the airbag absorbs the marking liquid inside the material box into the airbag through the auxiliary pipe. In this process, the first one-way valve and the second one-way valve make the marking liquid flow direction from the material box to the nozzle, and no backflow occurs, ensuring the stability of the nozzle and the airbag. S2: When the extrusion plate is pushed, the extrusion plate will drive the long pin to move synchronously. When the long pin moves, the push block will intermittently push the upper connecting block on the upper surface of the column. When the upper connecting block is pushed, the column drops and squeezes the reset spring. When the upper connecting block is not pushed, the column returns to its original position under the action of the reset spring, so that the upper connecting block, the column and the shifting block make reciprocating linear motion in the vertical direction under the action of the thrust and the reset spring, and then the shifting block shifts the marking liquid to prevent impurities from precipitating in the marking liquid. S3: When the long pin moves, the first magnet will intermittently approach the second magnet. When the first magnet approaches the second magnet, the knocking rod rises under the action of the mutual magnetic force. At this time, the auxiliary spring is squeezed. When the first magnet moves away from the second magnet, the knocking rod descends under the action of the auxiliary spring. The above process is repeated. The knocking rod makes reciprocating linear motion in the vertical direction under the action of the mutual magnetic force between the first magnet and the second magnet and the auxiliary spring. Then the knocking rod will hit the clicker. At this time, the clicker serves as a warning, allowing the staff to concentrate and facilitate the normal progress of the detection work.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: the device and method for detecting the installation accuracy of the accessories of the printing machine adopt a new structural design, and can quickly mark the defective products through the nozzles provided, and also provide a shaking structure for the marking liquid to prevent the precipitation of impurities, and also have a reminder function, which is convenient for the staff to concentrate their attention. The specific contents are as follows: (1) The device and method for detecting the installation accuracy of the printing machine accessories, when working, the printing machine with the printing roller installed is neatly placed in front of the high-definition detection probe, and then the motor is started. When the motor is working, the threaded rod and the limit rod drive the device box and the high-definition detection probe to move in the horizontal direction to detect the workpiece; Furthermore, when defective products are detected, the staff can push the extrusion plate to make the extrusion plate press the airbag, and then the airbag feeds the nozzle through the connecting pipe, that is, sprays the marking liquid through the nozzle to mark the defective products, so that the defective products can be handled by the staff; Furthermore, when the squeezing plate is pushed, the connecting spring will be squeezed, and after the squeezing plate is released, the connecting spring pushes the squeezing plate to reset, and the airbag expands again, and then the airbag absorbs the marking liquid inside the material box into the airbag through the auxiliary tube. In this process, the first one-way valve and the second one-way valve make the marking liquid flow from the material box to the nozzle, and the backflow will not occur, thereby ensuring the stability of the nozzle operation; (2) The device and method for detecting the installation accuracy of the accessories of the printing machine, when the extrusion plate is pushed, the extrusion plate will drive the long pin to move synchronously, and when the long pin moves, the push block will intermittently push the upper connecting block, so that the upper connecting block, the column and the shifting block, under the action of the thrust and the return spring, make reciprocating linear motion in the vertical direction, and then the shifting block can shift the marking liquid to prevent impurities from precipitating in the marking liquid; Furthermore, the uprights are evenly spaced on the surface of the horizontal plate, and the shifting blocks are evenly spaced on the surface of the uprights, so that the plurality of shifting blocks optimizes the effect of shaking the marking liquid; (3) In the device and method for detecting the installation accuracy of the accessories of the printing press, when the long pin moves, the first magnet will intermittently approach the second magnet, and then the knocking rod will hit the clicker under the action of the mutual magnetic force between the first magnet and the second magnet and the auxiliary spring. At this time, the clicker acts as a warning, allowing the staff to concentrate their attention and facilitate the normal progress of the detection work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the connection structure between the working plate and the motor of the present invention; Figure 2 This is a schematic diagram of the working state structure of the equipment box of the present invention; Figure 3 This is a schematic diagram of the connection structure between the equipment box and the detection high-definition probe of the present invention; Figure 4 It is a schematic diagram of the connection structure between the vertical plate and the airbag of the present invention; Figure 5 For the present invention Figure 4 The enlarged structural diagram at A in the middle; Figure 6 This is a schematic diagram of the structure of the material box in a cutaway state of the present invention; Figure 7 This is a schematic diagram of the working state structure of the shift block of the present invention; Figure 8 This is a schematic diagram of the connection structure between the knocking rod and the second magnet of the present invention; Fig. 9 It is a schematic diagram of the structure of the knocking rod of the present invention in working state.

[0017] In the figure: 1. working plate; 2. bracket; 3. motor; 4. threaded rod; 5. limit rod; 6. equipment box; 7. high-definition detection probe; 8. warning light; 9. material box; 10. vertical plate; 11. air bag; 12. extrusion plate; 13. limit strip; 14. connecting pipe; 15. nozzle; 16. first one-way valve; 17. connecting spring; 18. baffle; 19. auxiliary pipe; 20. second one-way valve; 21. long pin; 22. push block; 23. column; 24. upper connecting block; 25. horizontal plate; 26. dial block; 27. reset spring; 28. outer frame; 29. ​​knock rod; 30. first magnet; 31. clicker; 32. second magnet; 33. auxiliary spring. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0019] Embodiment 1: The most basic inspection work is completed by setting the high-definition detection probe 7, and the defective products are marked by the set nozzle 15, such as Figure 1-Figure 5 As shown: It includes a working plate 1, a motor 3 and a material box 9, the lower surface of the working plate 1 is threadedly connected with a bracket 2, and the inside of the working plate 1 is fixedly connected with a limit rod 5, and the working plate 1 is symmetrically distributed about the center of the limit rod 5; The motor 3 is bolted to the outer wall of the left working plate 1, and the output end of the motor 3 is fixedly connected to the threaded rod 4, and the surface of the threaded rod 4 is threadedly connected to the equipment box 6, the material box 9 is fixedly connected to the upper surface of the equipment box 6, and the material box 9 is movably provided with a shifting block 26, and the equipment box 6 is sleeved and connected to the surface of the limit rod 5; Also includes: A high-definition detection probe 7 is bolted to the outer wall of the equipment box 6, and a warning light 8 is fixedly connected to the outer surface of the other side of the equipment box 6, and the high-definition detection probe 7 and the warning light 8 are connected by electrical signals; The vertical plate 10 is fixedly connected to the upper surface of the equipment box 6, and the airbag 11 is bonded to the surface of the vertical plate 10, and the surface of the vertical plate 10 is fixedly connected to the limit strip 13, and the extrusion plate 12 is slidably arranged on the surface of the limit strip 13, and the surface of the extrusion plate 12 is in contact with the surface of the airbag 11, and the upper surface of the airbag 11 and the interior of the vertical plate 10 are fixedly connected with a connecting pipe 14; The nozzle 15 is fixedly connected to the end of the internal connecting pipe 14 of the vertical plate 10, the clicker 31 is fixedly connected to the upper surface of the equipment box 6, the limit strips 13 are symmetrically distributed about the center of the extrusion plate 12, and the end of the limit strips 13 is fixedly connected with a baffle 18, and adjacent connecting pipes 14 are connected by threaded external hoses.

[0020] A first one-way valve 16 is fixedly connected to the surface of the connecting pipe 14 , a connecting spring 17 having an elastic reset function is fixedly connected to the surface of the extrusion plate 12 , and the other side of the connecting spring 17 is fixedly connected to the outer wall of the vertical plate 10 .

[0021] Auxiliary tubes 19 are fixedly connected to the surface of the airbag 11 and the interior of the material box 9 , and adjacent auxiliary tubes 19 are connected via threaded external hoses, and a second one-way valve 20 is fixedly connected to the surface of the auxiliary tube 19 .

[0022] During operation, the printing machine with the printing roller installed is neatly placed in front of the high-definition detection probe 7, and then the motor 3 on the surface of the working plate 1 is started. When the motor 3 is working, the threaded rod 4 and the limit rod 5 drive the equipment box 6 and the high-definition detection probe 7 to move in the horizontal direction to detect the workpiece. When defective products are detected, the warning light 8 lights up. At this time, the staff can push the extrusion plate 12 to make the extrusion plate 12 slide on the limit bar 13 and press the airbag 11, and then the airbag 11 feeds the nozzle 15 through the connecting pipe 14, that is, sprays the marking liquid through the nozzle 15. Defective products are marked to facilitate their handling by staff. When the extrusion plate 12 is pushed, the connecting spring 17 will be squeezed. After the extrusion plate 12 is released, the connecting spring 17 pushes the extrusion plate 12 to return to its original position. At this time, the airbag 11 expands again, and then the airbag 11 absorbs the marking liquid inside the material box 9 into the airbag 11 through the auxiliary tube 19. In this process, the first one-way valve 16 and the second one-way valve 20 make the marking liquid flow from the material box 9 to the nozzle 15, and backflow will not occur, thereby ensuring the stability of the nozzle 15 and the airbag 11.

[0023] Embodiment 2: Different from Embodiment 1, the coolant can be shaken by setting the column 23 and the shift block 26, so that no impurities are precipitated. Figure 6 and Figure 7 As shown: A long pin 21 is fixedly connected to the outer wall of the extrusion plate 12 , and the long pin 21 is movably arranged inside the material box 9 , and a push block 22 is fixedly connected to the lower surface of the long pin 21 .

[0024] A transverse plate 25 is fixedly connected to the inner wall of the material box 9, and a column 23 is slidably arranged inside the transverse plate 25, and an upper connecting block 24 corresponding to the push block 22 is fixedly connected to the upper surface of the column 23, and the left and right sides of the upper connecting block 24 and the left and right sides of the push block 22 are all inclined, and the columns 23 are evenly spaced inside the transverse plate 25.

[0025] The shifting blocks 26 are evenly spaced on the surface of the column 23 , and a return spring 27 having an elastic return function is fixedly connected to the lower surface of the column 23 , and the other side of the return spring 27 is fixedly connected to the inner wall of the material box 9 .

[0026] When the extrusion plate 12 is pushed, the extrusion plate 12 will drive the long pin 21 to move synchronously. When the long pin 21 moves, the push block 22 will intermittently push the upper connecting block 24 on the upper surface of the column 23. When the upper connecting block 24 is pushed, the column 23 descends and squeezes the reset spring 27. When the upper connecting block 24 is not pushed, the column 23 returns to its original position under the action of the reset spring 27, so that the upper connecting block 24, the column 23 and the shifting block 26 make reciprocating linear motion in the vertical direction under the action of the thrust and the reset spring 27, and then the shifting block 26 can shift the marking liquid to prevent impurities from precipitating in the marking liquid.

[0027] Embodiment 3: Different from Embodiment 2, the knocking rod 29 can hit the clicker 31, so that the clicker 31 makes a sound, thereby playing a warning role. Figure 8 and Fig. 9 As shown: The upper surface of the equipment box 6 is fixedly connected to an outer frame 28, and the left view of the outer frame 28 is an inverted "U" shape, and a knocking rod 29 corresponding to the clicker 31 is slidably provided inside the outer frame 28, and the upper surface of the knocking rod 29 is fixedly connected to a second magnet 32, and the upper surface of the long pin 21 is fixedly connected to a first magnet 30 corresponding to the second magnet 32.

[0028] The magnetic poles on the upper surface of the first magnet 30 are opposite to the magnetic poles on the lower surface of the second magnet 32. The surface of the knocking rod 29 is convex, and the upper surface of the knocking rod 29 is fixedly connected to an auxiliary spring 33 that plays an elastic reset role, and the other side of the auxiliary spring 33 is fixedly connected to the lower surface of the outer frame 28.

[0029] When the long pin 21 moves, the first magnet 30 will intermittently approach the second magnet 32. When the first magnet 30 approaches the second magnet 32, the knocking rod 29 rises under the action of the mutual magnetic force. At this time, the auxiliary spring 33 is squeezed, and when the first magnet 30 is away from the second magnet 32, the knocking rod 29 descends under the action of the auxiliary spring 33. The above process is repeated. The knocking rod 29 makes reciprocating linear motion in the vertical direction under the action of the mutual magnetic force between the first magnet 30 and the second magnet 32 ​​and the auxiliary spring 33, and then the knocking rod 29 will hit the clicker 31. At this time, the clicker 31 serves as a warning, allowing the staff to concentrate their attention and facilitate the normal progress of the detection work.

[0030] The above is the working process of the entire device, and the contents not described in detail in this specification belong to the existing technology known to professional and technical personnel in this field.

Claims

1. A device for detecting the installation accuracy of accessories of a printing press, comprising a working plate (1), a motor (3) and a material box (9), wherein a bracket (2) is threadedly connected to the lower surface of the working plate (1), a limiting rod (5) is fixedly connected to the inside of the working plate (1), and the working plate (1) is symmetrically distributed about the center of the limiting rod (5); The motor (3) is bolted to the outer wall of the left working plate (1), and the output end of the motor (3) is fixedly connected to a threaded rod (4), and the surface of the threaded rod (4) is threadedly connected to an equipment box (6); The material box (9) is fixedly connected to the upper surface of the equipment box (6), a shifting block (26) is movably provided inside the material box (9), and the equipment box (6) is sleeved and connected to the surface of the limit rod (5); It is characterized in that Also includes: A high-definition detection probe (7), wherein the high-definition detection probe (7) is bolted to the outer wall of the equipment box (6), and a warning light (8) is fixedly connected to the outer surface of the other side of the equipment box (6), and the high-definition detection probe (7) and the warning light (8) are connected by electrical signals; A vertical plate (10), the vertical plate (10) being fixedly connected to the upper surface of the equipment box (6), an air bag (11) being bonded to the surface of the vertical plate (10), and a limiting strip (13) being fixedly connected to the surface of the vertical plate (10); An extrusion plate (12), the extrusion plate (12) being slidably disposed on the surface of the limiting strip (13), the surface of the extrusion plate (12) being in contact with the surface of the airbag (11), and the upper surface of the airbag (11) and the interior of the vertical plate (10) being fixedly connected with a connecting pipe (14); A nozzle (15), the nozzle (15) being fixedly connected to the end of an internal connecting pipe (14) of the vertical plate (10); A clicker (31), wherein the clicker (31) is fixedly connected to the upper surface of the equipment box (6).

2. A printing machine accessory installation accuracy detection device according to claim 1, characterized in that: The limiting strips (13) are symmetrically distributed about the center of the extrusion plate (12), and the ends of the limiting strips (13) are fixedly connected to baffles (18), and adjacent connecting pipes (14) are connected via threaded external hoses.

3. A printing machine accessory installation accuracy detection device according to claim 1, characterized in that: A first one-way valve (16) is fixedly connected to the surface of the connecting pipe (14), a connecting spring (17) having an elastic reset function is fixedly connected to the surface of the extrusion plate (12), and the other side of the connecting spring (17) is fixedly connected to the outer wall of the vertical plate (10).

4. A printing machine accessory installation accuracy detection device according to claim 1, characterized in that: Auxiliary tubes (19) are fixedly connected to the surface of the airbag (11) and the interior of the material box (9), and adjacent auxiliary tubes (19) are connected via threaded external hoses, and a second one-way valve (20) is fixedly connected to the surface of the auxiliary tube (19).

5. The device for detecting the installation accuracy of printing machine accessories according to claim 1, characterized in that: A long pin (21) is fixedly connected to the outer wall of the extrusion plate (12), and the long pin (21) is movably arranged inside the material box (9), and a push block (22) is fixedly connected to the lower surface of the long pin (21).

6. A printing machine accessory installation accuracy detection device according to claim 5, characterized in that: A transverse plate (25) is fixedly connected to the inner wall of the material box (9), and a column (23) is slidably arranged inside the transverse plate (25), and an upper connecting block (24) corresponding to the push block (22) is fixedly connected to the upper surface of the column (23), and the left and right sides of the upper connecting block (24) and the left and right sides of the push block (22) are both inclined, and the columns (23) are evenly spaced inside the transverse plate (25).

7. A printing machine accessory installation accuracy detection device according to claim 6, characterized in that: The shifting blocks (26) are distributed at equal intervals on the surface of the column (23), and a return spring (27) having an elastic return function is fixedly connected to the lower surface of the column (23), and the other side of the return spring (27) is fixedly connected to the inner wall of the material box (9).

8. The device for detecting the installation accuracy of printing machine accessories according to claim 5, characterized in that: The upper surface of the equipment box (6) is fixedly connected to an outer frame (28), and the left side view of the outer frame (28) is an inverted "U" shape, and a knocking rod (29) corresponding to the clicker (31) is slidably provided inside the outer frame (28), and a second magnet (32) is fixedly connected to the upper surface of the knocking rod (29), and a first magnet (30) corresponding to the second magnet (32) is fixedly connected to the upper surface of the long pin (21).

9. A printing machine accessory installation accuracy detection device according to claim 8, characterized in that: The magnetic poles of the upper surface of the first magnet (30) are opposite to the magnetic poles of the lower surface of the second magnet (32); the surface of the knocking rod (29) is convex, and an auxiliary spring (33) having an elastic reset function is fixedly connected to the upper surface of the knocking rod (29), and the other side of the auxiliary spring (33) is fixedly connected to the lower surface of the outer frame (28).

10. A method for detecting the installation accuracy of a printing machine accessory according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: When working, the printing machine with the printing roller installed is neatly placed in front of the high-definition detection probe (7), and then the motor (3) on the surface of the working plate (1) is started. When the motor (3) is working, the threaded rod (4) and the limit rod (5) drive the equipment box (6) and the high-definition detection probe (7) to move in the horizontal direction to detect the workpiece. When defective products are detected, the warning light (8) lights up. At this time, the staff pushes the extrusion plate (12) to make the extrusion plate (12) slide on the limit bar (13) and press the airbag (11), and then the airbag (11) supplies the nozzle (15) through the connecting pipe (14), that is, the marking liquid is sprayed through the nozzle (15). , marking the defective products, so that the defective products can be handled by the staff later. When the squeezing plate (12) is pushed, the connecting spring (17) is squeezed. After the squeezing plate (12) is released, the connecting spring (17) pushes the squeezing plate (12) to reset. At this time, the airbag (11) expands again, and then the airbag (11) absorbs the marking liquid inside the material box (9) into the airbag (11) through the auxiliary pipe (19). In this process, the first one-way valve (16) and the second one-way valve (20) make the marking liquid flow from the material box (9) to the nozzle (15), and the backflow will not occur, thereby ensuring the stability of the nozzle (15) and the airbag (11). S2: When the extrusion plate (12) is pushed, the extrusion plate (12) will drive the long pin (21) to move synchronously. When the long pin (21) moves, the push block (22) will intermittently push the upper connecting block (24) on the upper surface of the column (23). When the upper connecting block (24) is pushed, the column (23) descends and squeezes the return spring (27). When the upper connecting block (24) is not pushed, the column (23) returns to its original position under the action of the return spring (27), so that the upper connecting block (24), the column (23) and the shifting block (26) perform reciprocating linear motion in the vertical direction under the action of the thrust and the return spring (27), and then the shifting block (26) shifts the marking liquid to prevent impurities from precipitating in the marking liquid; S3: When the long pin (21) moves, the first magnet (30) will intermittently approach the second magnet (32). When the first magnet (30) approaches the second magnet (32), the knocking rod (29) rises under the action of the mutual magnetic force. At this time, the auxiliary spring (33) is squeezed. When the first magnet (30) moves away from the second magnet (32), the knocking rod (29) descends under the action of the auxiliary spring (33). The above process is repeated. The knocking rod (29) performs reciprocating linear motion in the vertical direction under the action of the mutual magnetic force between the first magnet (30) and the second magnet (32) and the auxiliary spring (33). Then, the knocking rod (29) hits the clicker (31). At this time, the clicker (31) serves as a warning, allowing the staff to concentrate their attention and facilitate the normal progress of the detection work.

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