A method for overlaying pages in rotary printing press

Abstract

The invention discloses a sheet-feeding method for a rotary printing machine, comprising a sheet-feeding mechanism for the rotary printing machine, wherein the mechanism comprises a sheet-feeding roller, a sheet-storing roller, a sheet-transferring roller and a gripper assembly, wherein the sheet-feeding roller, the sheet-storing roller and the sheet-transferring roller are respectively installed between wall panels through hollow shafts from top to bottom, openings are respectively arranged on the outer circumferential surfaces of the sheet-feeding roller, the sheet-storing roller and the sheet-transferring roller, and the gripper assemblies are respectively installed at the openings, and the gripper assembly comprises a gripper, a needle box and an elastic power shaft, wherein the gripper is arranged in the needle box at equal intervals, the elastic power shaft passes through an inner guide support plate in the roller and is fixedly connected to the needle box, a limiting ring is arranged on the elastic power shaft, a spring is arranged between the limiting ring and the inner guide support plate, the uppermost end of the gripper is arranged as a needle head, and a paper gripper portion is arranged below the needle head; the sheet-feeding action is completed by the cooperation of a plurality of rollers, a cam mechanism and the gripper assembly, thereby greatly saving equipment and labor costs.

Description

Technical Field

[0001] The invention relates to the technical field of printing press overlay, in particular to a rotary printing press overlay method. Background Art

[0002] Rotary printing presses are generally equipped with folding machines. Since the printing part can only print one set of plates at a time, the folding machine can only fold a single sheet. Therefore, traditional folding machines can only fold a single sheet at a time. If you want to use a traditional folding machine to overlay pages, you need multiple host machines to print at the same time, and bring the samples printed by multiple host machines together through different paper paths. After the sheets are stacked together, they enter a folding machine for folding. This form of printing and folding has many disadvantages: it requires multiple host machines, and the machine occupies too much space; multiple host machines are expensive; any of them When a paper path has problems such as printing quality, paper changing, or paper breaking, all the folded products will be scrapped; a large number of operators are required; to achieve page overlapping with a single printing unit, page overlapping can only be done manually, with very low work efficiency and high labor intensity; traditional printing and page overlapping methods are costly, consume a lot of manpower and material resources, and have obvious disadvantages; with the advent of the digital printing era, the main machine part adopts digital printing, which can print multiple printed products with different contents on one main machine. For example, most newspapers have multiple contents, and some books and periodicals also have page overlapping requirements.

[0003] Chinese patent application No. 201821776530.5 discloses a nesting and paging mechanism, which separates the opened book signature from the middle and further opens the book signature through the paging block on the paging auxiliary component. As the book signature is transported, the book signature is smoothly transported to the nesting position of the nesting machine through the transition slide bar fixed on the paging block, and the separated effect of the transition slide bar makes the opened book signature always remain in the open state, and at the same time, a part of the opened book signature slides in the third guide rail, and the other part slides in the second guide rail 13, and then is fed to the nesting position of the nesting machine through the feeding device of the nesting machine. A single page or another book sheet is conveyed from the opened book sheet and made to fall into the first guide rail, and then the page-flush process is completed through the conveyance of the page-flush machine. The page-flush is to come together through different paper paths, stack the printed sheets together, and then enter a folding machine for folding. Similarly, Chinese patent application No. 201420088452.5 discloses a structurally improved page-flush machine and Chinese patent application No. 201420091513.3 discloses a fully automatic page-flush machine, which also adopts the method of bringing different paper paths together, and has the above-mentioned technical problems.

[0004] Chinese patent application No. 202010371062.9 discloses a folding machine and UV printing system, including a cutting roller, a folding pin roller and a sheet storage roller. The folding pin roller cooperates with the cutting roller to rotate relative to each other. The outer edge of the folding pin roller is provided with a needle and a cutting groove along the axial direction. A double parallel folding roller that cooperates with and rotates relatively to the sheet storage roller is provided above the sheet storage roller. The outer edge of the double parallel folding roller is provided with a gripper and a second folding knife; a page transfer mechanism is provided on the side of the sheet storage roller away from the folding pin roller, which is mainly used for cutting and folding paper. The provided needle pierces the paper so that the paper is attached to the surface of the folding pin roller to cooperate to complete the cutting of the paper, and the sheet-folding function cannot be realized. In order to solve the problems existing in printing products such as newspapers and magazines that require sheet-folding, a sheet-folding method for a rotary printing machine is proposed. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the existing defects and provide a method for overlaying pages in a rotary printing machine. The mechanism and method completely change the traditional overlaying method, and adopt the mutual cooperation of several rollers, cam mechanisms and needle gripper assemblies to complete the overlaying action of 1 page, 2 pages, 3 pages or more pages, which greatly saves equipment and labor costs, shortens the intermediate time from printing to finished products, and can also produce 1 page when overlaying is not needed. The switching and adjustment are convenient and quick, which can effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a rotary printing machine sheet-feeding method, comprising a rotary printing machine sheet-feeding mechanism, the mechanism comprising a sheet-feeding roller, a sheet-storing roller, a sheet-transferring roller and a gripper assembly, the sheet-feeding roller, the sheet-storing roller and the sheet-transferring roller are respectively installed between the wall panels through hollow shafts from top to bottom, the sheet-feeding roller, the sheet-storing roller and the sheet-transferring roller are respectively provided with openings on their outer circumferential surfaces, the gripper assemblies are respectively installed at the openings, the gripper assembly comprises a gripper, a needle box and an elastic power shaft, the gripper is arranged in the needle box at equal intervals, the elastic power shaft passes through an inner guide support plate in the roller and is fixedly connected to the needle box, a limiting ring is arranged on the elastic power shaft, a spring is arranged between the limiting ring and the inner guide support plate, the uppermost end of the gripper is arranged as a needle head, a paper gripper is arranged below the needle head, the paper gripper is composed of annular grooves arranged at equal intervals, and a guide roller is arranged on the right side of the sheet-feeding roller. The sheet-feeding method comprises the following specific steps:

[0007] Step 1: The feed roller grips the paper. The cut paper enters between the feed roller and the guide roller. The gripper on the feed roller stretches out to grip the paper. The guide roller drives the paper to move toward the gap between the feed roller and the storage roller.

[0008] Step 2: The sheet storage roller receives the paper, and the paper rotates to the junction of the sheet feeding roller and the sheet storage roller. The gripper on the sheet feeding roller is retracted, and the gripper on the sheet storage roller is extended to hold the paper. The paper is transferred from the sheet feeding roller to the sheet storage roller, and the transferred paper is driven by the gripper to rotate with the sheet storage roller;

[0009] Step 3: During the sheet-wrapping action, the paper is transferred normally between the sheet-feeding roller and the sheet-storing roller. When the paper rotates on the sheet-storing roller to the intersection with the sheet-passing roller, the gripper on the sheet-storing roller does not retract, and the gripper on the sheet-passing roller does not extend. The paper continues to wrap around the sheet-storing roller and rotate on the roller. When the paper rotates with the sheet-storing roller to the intersection with the sheet-feeding roller, the gripper on the sheet-storing roller will grip the second page and enter the next cycle.

[0010] Step 4: Release the paper. When the page storage roller stores the set number of pages, the paper on the page storage roller rotates to the junction with the page transfer roller. The grippers on the page storage roller and the page transfer roller move at the same time, that is, the grippers on the page storage roller retract and the grippers on the page transfer roller extend. At this time, the grippers on the page transfer roller simultaneously hold the paper that has completed the page transfer and enter the next action.

[0011] Furthermore, when there is no need to overlap pages, in step three, the gripper on the page transfer roller extends out to grip the paper, the gripper on the page storage roller retracts, and the paper is transferred from the page storage roller. Every time the page transfer roller rotates one circle, a piece of paper will be ejected from the page transfer roller.

[0012] Furthermore, a needle seat is provided on the needle box, and a needle body and a guide part are provided at the lower part of the needle holder. The guide part is inserted into the needle seat and is slidably connected with the needle seat. A limit plate is provided at the upper end of the guide part, and a spring 2 is provided between the limit plate and the inner wall of the needle box.

[0013] Furthermore, the needle body and the guide part are designed as a separate structure, and the needle body and the guide part are connected by means of threads.

[0014] Furthermore, the upper and lower surfaces of the opening are respectively provided with fixing plates, the outer side of the fixing plate is provided with a guide rod, the needle box is provided with a support ear, the needle box is slidably connected to the guide rod through the support ear, a rubber strip seat is provided on the outer side of the fixing plate, a rubber strip is provided on the rubber strip seat, a needle plate is provided on the rubber strip, and a needle hole corresponding to the needle is provided on the needle plate.

[0015] Furthermore, it also includes a cam mechanism, which is arranged in the drum, and the cam mechanism includes a cam bracket, a camshaft and a cam, the cams are installed on the camshaft at equal intervals, the camshaft is arranged on the cam bracket, a servo motor is arranged on the outer side of the cam bracket, a driving wheel is arranged on the output shaft of the servo motor, the driving wheel is meshed with the driven wheel on the camshaft, and a roller is arranged on the other end of the elastic power shaft, and the roller is in rolling contact with the cam.

[0016] Furthermore, a side frame is provided on the outer side of the cam bracket, and the side frame is fixedly connected to the inner wall of the drum. An air intake pipe is passed through the hollow shaft, and one end of the air intake pipe passes through the drum, and the other end of the air intake pipe passes through the hollow shaft and is fixedly connected to the outer bracket on the side of the wall panel. A flexible pipe is connected to the outer end of the air intake pipe, and an air intake channel is provided at the center hole of the air intake pipe. The air intake pipe located in the drum is provided with air intake holes connected to the air intake channel in the circumferential direction, and a through hole is opened in the circumferential direction of the drum.

[0017] Furthermore, an external transmission assembly and a drive motor are arranged on the outer side of the wall panel.

[0018] Furthermore, a left limit roller is arranged on the left side of the page storage roller, a right limit roller is arranged on the right side of the page storage roller, and a lower limit roller is arranged on the right side of the page transfer roller. Annular needle grooves are respectively arranged on the page feeding roller, page storage roller, page transfer roller, guide roller, left limit roller, right limit roller and lower limit roller. The annular needle grooves on the page feeding roller, page storage roller and page transfer roller are staggered with each other, and the annular needle groove on the guide roller corresponds to the gripping needle on the page feeding roller.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. This mechanism and method completely change the traditional method of overlaying pages. It uses the cooperation of several rollers, cam mechanisms and gripper assemblies to complete the overlaying of 1 page, 2 pages, 3 pages or more pages, which greatly saves equipment and labor costs and shortens the intermediate time from printing to finished products. When overlaying is not needed, 1 page can also be produced. The switching and adjustment are convenient and fast.

[0021] 2. The guide part is forced to slide into the needle seat, thereby driving the needle to retract. Spring 2 makes the gripper needle have a certain elasticity to avoid hard contact and play a protective role. When the gripper needle grips the paper, the paper will be stuck on the paper gripper part. The annular groove restricts the paper, making it difficult for the paper to detach from the gripper needle, thereby being able to stably drive the paper to rotate around the drum.

[0022] 3. The role of the rubber strip is to press the paper when the gripper needle pierces the paper, so that the gripper needle can ensure the stability of the paper when gripping the paper. The annular needle groove provides a piercing gap for the gripper needle. At the same time, the outer surface of the annular needle groove provides support for the paper, ensuring that the gripper needle can pierce the paper smoothly.

[0023] 4. The ingenious setting of the sheet-stitching mechanism can meet the needs of digital printing. Only one paper path can meet the needs of sheet-stitching. It has a high degree of automation and does not require manual operation. The overall structure of the sheet-stitching mechanism is compact, which reduces the size and cost of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the internal structure of the drum of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the present invention without the cam bracket;

[0027] Figure 4 This is a schematic diagram of the needle installation position structure of the present invention;

[0028] Figure 5 This is a schematic diagram of the cam installation structure of the present invention;

[0029] Figure 6 This is a schematic diagram of the needle box structure of the present invention;

[0030] Figure 7 This is a schematic diagram of the needle box structure of the present invention without the top plate;

[0031] Figure 8 This is a schematic diagram of the needle-holding structure of the present invention;

[0032] Fig. 9 This is a schematic diagram of the structure of the air intake channel of the present invention;

[0033] Fig.10 It is a left-side structural schematic diagram of the present invention;

[0034] Fig.11 This is a schematic diagram of a state where the present invention does not require page nesting;

[0035] Fig.12 It is a schematic diagram of the page-folding state of the present invention.

[0036] In the figure: 1 driving motor, 2 external transmission assembly, 3 page feeding roller, 4 guide roller, 5 page storage roller, 6 right limit roller, 7 page transfer roller, 8 lower limit roller, 9 wall panel, 10 external bracket, 11 suction pipe, 12 flexible pipe, 13 servo motor, 14 hollow shaft, 15 inner guide support plate, 16 side frame, 17 cam bracket, 18 driving wheel, 19 driven wheel, 20 camshaft, 21 cam, 22 roller, 23 needle Box, 24 opening, 25 guide rod, 26 ear, 27 fixing plate, 28 rubber strip seat, 29 rubber strip, 30 needle plate, 31 needle holder, 32 elastic power shaft, 33 spring one, 34 limiting ring, 35 needle seat, 36 spring two, 37 limiting disk, 38 needle head, 39 paper holder, 40 needle body, 41 guide part, 42 suction hole, 43 suction channel, 44 annular needle groove, 45 left limiting roller, 46 paper, 47 needle hole. DETAILED DESCRIPTION

[0037] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] See also Figure 1-12 The present invention provides a technical solution: a rotary printing press sheet-feeding method, comprising a rotary printing press sheet-feeding mechanism, the mechanism comprising a sheet-feeding roller 3, a sheet-storing roller 5, a sheet-transferring roller 7 and a gripper assembly, the sheet-feeding roller 3, the sheet-storing roller 5 and the sheet-transferring roller 7 are respectively installed between wall panels 9 through hollow shafts 14 from top to bottom, the sheet-feeding roller 3, the sheet-storing roller 5 and the sheet-transferring roller 7 are respectively provided with openings 24 on their outer circumferential surfaces, the gripper assemblies are respectively installed at the openings 24, the gripper assemblies comprise gripper assemblies 31, a needle box 23 and an elastic power shaft 32, the gripper assemblies are arranged in the needle box 23 at equal intervals, the elastic power shaft 32 passes through an inner guide support plate 15 in the roller and is fixedly connected to the needle box 23, the inner guide support plate 15 A limit ring 34 is provided on the elastic power shaft 32, and a spring 33 is provided between the limit ring 34 and the inner guide support plate 15. The spring 33 can automatically restore the elastic power shaft 32 to the initial state, so that the roller 22 can always be close to the cam 21. The uppermost end of the gripper 31 is provided with a needle 38, and a paper gripper 39 is provided below the needle 38. The paper gripper 39 is composed of annular grooves arranged at equal intervals. After the needle 38 pierces the paper 46, the paper will be stuck on the paper gripper 39. The annular groove restricts the paper, so that the paper is not easy to detach from the gripper 31, thereby being able to stably drive the paper 46 to rotate around the roller. A guide roller 4 is provided on the right side of the page feeding roller 3. The sheet-feeding method includes the following specific steps:

[0039] Step 1: The feed roller 3 grips the paper, and the cut paper 46 enters between the feed roller 3 and the guide roller 4. The gripper 31 on the feed roller 3 extends out to grip the paper 46, and the guide roller 4 drives the paper 46 to move toward the gap between the feed roller 3 and the storage roller 5.

[0040] Step 2: The sheet storage drum 5 receives the paper 46, and the paper 46 rotates to the junction of the sheet feeding drum 3 and the sheet storage drum 5, the gripper 31 on the sheet feeding drum 3 is retracted, and the gripper 31 on the sheet storage drum 5 is extended to hold the paper 46, and the paper 46 is transferred from the sheet feeding drum 3 to the sheet storage drum 5, and the transferred paper 46 is driven by the gripper 31 to rotate with the sheet storage drum 5;

[0041] Step 3: Page-wrapping action, the paper 46 is transferred normally between the page-feeding roller 3 and the page-storing roller 5. When the paper 46 rotates on the page-storing roller 5 to the intersection with the page-passing roller 7, the gripper 31 on the page-storing roller 5 does not retract, and the gripper 31 on the page-passing roller 7 does not extend. The paper 46 continues to follow the page-storing roller 5 and is wrapped on the roller to rotate. When the paper 46 rotates with the page-storing roller 5 to the intersection with the page-feeding roller 3, the gripper 31 on the page-storing roller 5 will continue to grip the second page and enter the next cycle.

[0042] During the sheet-feeding action, the gripper 31 on the sheet-storing roller 5 that should be retracted does not retract due to the action of the cam 21, and the gripper 31 on the sheet-transferring roller 7 that should be extended does not extend due to the action of the cam 21, and the sheet 46 that should be transferred is no longer transferred from the sheet-storing roller 5 to the sheet-transferring roller 7;

[0043] Step 4: Release the paper 46. When the page storage roller 5 stores the set number of pages, the paper 46 on the page storage roller 5 rotates to the junction with the page passing roller 7, and the grippers 31 on the page storage roller 5 and the page passing roller 7 act at the same time, that is, the grippers 31 on the page storage roller 5 retract, and the grippers 31 on the page passing roller 7 extend. At this time, the grippers 31 on the page passing roller 7 simultaneously grip the paper 46 that has completed the page setting and enter the next action.

[0044] Through the cooperation of the actions of the gripping needles 31 on the page storage cylinder 5 and the page transfer cylinder 7, the stacking of one or more pages can be completed.

[0045] When there is no need to insert pages, in step three, the gripper 31 on the page transfer roller 7 extends to grip the paper 46, and the gripper 31 on the page storage roller 5 retracts, and the paper 46 is handed over from the page storage roller 5. Every time the page transfer roller 7 rotates one circle, a piece of paper will be ejected from the page transfer roller 7.

[0046] A needle seat 35 is provided on the needle box 23, and a needle body 40 and a guide portion 41 are provided at the lower part of the needle gripper 31. The guide portion 41 is inserted into the needle seat 35 and is slidably connected to the needle seat 35. The guide portion 41 is forced to slide into the needle seat 35, thereby driving the needle head 38 to retract, thereby playing a protective role. A limit plate 37 is provided at the upper end of the guide portion 41, and a spring 2 36 is provided between the limit plate 37 and the inner wall of the needle box 23. The spring 2 36 makes the needle gripper 31 have a certain elasticity to avoid hard contact, thereby playing a role in protecting the needle gripper 31. The needle body 40 and the guide portion 41 can also be designed as a split structure, and the needle body 40 and the guide portion 41 are connected by threads. When the needle gripper 31 is damaged, the needle gripper 31 can be replaced separately, which is convenient to operate and improves maintenance efficiency.

[0047] The upper and lower surfaces of the opening 24 are respectively provided with fixing plates 27, and the outer side surface of the fixing plate 27 is provided with a guide rod 25, and the needle box 23 is provided with a support ear 26. The needle box 23 is slidably connected with the guide rod 25 through the support ear 26, and the guide rod 25 plays a role in guiding the movement of the needle box 23, ensuring accurate movement when the gripping needle 31 moves, and ensuring stable paper gripping action. A rubber strip seat 28 is provided on the outer side of the fixing plate 27, and a rubber strip 29 is provided on the rubber strip seat 28. The role of the rubber strip 29 is to press the paper when the gripping needle 31 pierces the paper 46, so that the gripping needle 31 ensures the stability of the paper 46 when gripping the paper, and a needle plate 30 is provided on the rubber strip 29, and a needle hole 47 corresponding to the gripping needle 31 is provided on the needle plate 30. When the gripping needle 31 moves, the gripping needle 31 passes through the needle hole 47 and pierces the paper 46.

[0048] The cam mechanism is arranged in the drum, and the cam mechanism includes a cam bracket 17, a camshaft 20 and a cam 21. The cam 21 is installed on the camshaft 20 at equal intervals. The camshaft 20 is arranged on the cam bracket 17. A servo motor 13 is arranged on the outer side of the cam bracket 17. A driving wheel 18 is arranged on the output shaft of the servo motor 13. The driving wheel 18 is engaged with a driven wheel 19 on the camshaft 20. The servo motor 13 drives the camshaft 20 to rotate through the driving wheel 18, thereby realizing the synchronous rotation of the cam 21 on the camshaft 20. A roller 22 is arranged on the other end of the elastic power shaft 32. The roller 22 is in rolling contact with the cam 21. The drive of the elastic power shaft 32 can also be driven by a connecting rod, as long as the reciprocating motion of the elastic power shaft 32 is realized.

[0049] A side frame 16 is provided on the outside of the cam bracket 17, and the side frame 16 is fixedly connected to the inner wall of the drum. The cam bracket 17 rotates synchronously with the drum. An air suction pipe 11 is passed through the hollow shaft 14, and one end of the air suction pipe 11 passes through the drum, and the other end of the air suction pipe 11 passes through the hollow shaft 14 and is fixedly connected to the outer bracket 10 on the side of the wall panel 9. The outer end of the air suction pipe 11 is connected to a flexible pipe 12, and the air suction pipe 11 is supported by the external bracket 10. The center hole of the air suction pipe 11 is provided with an air suction channel 43, and the air suction pipe 11 located in the drum is provided with an air suction hole 42 connected with the air suction channel 43 in the circumferential direction. A through hole is opened in the circumferential direction of the drum. Air is sucked through the flexible pipe 12 to make the inside of the drum in a negative pressure state, which can increase the contact force between the drum and the paper 46 to ensure that the first paper 46 is in firm contact with the drum.

[0050] An external transmission component 2 and a drive motor 1 are provided on the outside of the wall panel 9. The drive motor 1 can drive the hollow shaft 14 to rotate through the external transmission component 2, thereby driving the drum to rotate. The external transmission component 2 is composed of gears and an external shield, and can also be driven by a pulley. This part is an existing conventional structure and will not be introduced in detail here.

[0051] A left limit roller 45 is arranged on the left side of the page storage roller 5, and a right limit roller 6 is arranged on the right side of the page storage roller 5. The left limit roller 45 and the right limit roller 6 provide support for the paper 46, so that the paper 46 can be smoothly wrapped on the roller, which can be suitable for the overlapping of small-sized paper 46 to meet the use requirements. A lower limit roller 8 is arranged on the right side of the page transfer roller 7, and the lower limit roller 8 provides support for paper transfer. The page feeding roller 3, the page storage roller 5, the page transfer roller 7, and the guide roller 4. Annular needle grooves 44 are respectively provided on the left limit roller 45, the right limit roller 6 and the lower limit roller 8. The annular needle grooves 44 provide a piercing gap for the gripping needle 31 when gripping the paper. At the same time, the outer surface of the annular needle grooves 44 provides support for the paper 46 to ensure that the gripping needle 31 can smoothly pierce the paper 46. The annular needle grooves 44 on the page feeding roller 3, the page storage roller 5 and the page transfer roller 7 are staggered with each other, and the annular needle grooves 44 on the guide roller 4 correspond to the gripping needle 31 on the page feeding roller 3.

[0052] The paper 46 passes through the page feed roller 3, the page storage roller 5, and the page transfer roller 7 in sequence and is transferred along the direction of rotation. The installation arrangement relationship of the page feed roller 3, the page storage roller 5, and the page transfer roller 7 is fixed. As the page feed roller 3 rotates, the gripper 31 on the page feed roller 3 can be extended and retracted through the control of the cam 21. The gripper 31 on the page storage roller 5 can be extended and retracted by the cam 21. The gripper 31 on the page transfer roller 7 can be extended and retracted by the cam 21. The cam 21 is controlled by the servo motor 13 and matches the rotation speed of the rollers respectively, that is, it is accelerated and decelerated synchronously with the rotation speed of the rollers. The gripper 31 is used to grip the paper 46 to transfer the paper 46.

[0053] The basic principles, main features and advantages of the present invention are shown and described above. Without departing from the spirit and scope of the present invention, the present invention may also be subject to various changes and improvements, which all fall within the scope of the present invention to be protected.

Claims

1. A method for overlaying a rotary printing press, characterized in that: A rotary printing press sheet-feeding mechanism is provided, the mechanism comprising a sheet-feeding roller (3), a sheet-storing roller (5), a sheet-transferring roller (7), a gripper assembly and a cam mechanism; a guide roller (4) is arranged on the right side of the sheet-feeding roller (3); the sheet-feeding roller (3), the sheet-storing roller (5) and the sheet-transferring roller (7) are respectively installed between wall panels (9) via hollow shafts (14) from top to bottom; openings (24) are respectively arranged on the outer circumferential surfaces of the sheet-feeding roller (3), the sheet-storing roller (5) and the sheet-transferring roller (7); the gripper assemblies are respectively installed at the openings (24); the gripper assemblies comprise a gripper (31), a needle box (23) and a spring The elastic power shaft (32) and the gripping needle (31) are arranged at equal intervals in the needle box (23). The elastic power shaft (32) passes through the inner guide support plates (15) in the page feeding roller (3), the page storage roller (5) and the page transfer roller (7) and is fixedly connected to the needle box (23). A limit ring (34) is arranged on the elastic power shaft (32). A spring (33) is arranged between the limit ring (34) and the inner guide support plate (15). The uppermost end of the gripping needle (31) is arranged as a needle head (38). A paper gripping part (39) is arranged below the needle head (38). The paper gripping part (39) is composed of annular grooves arranged at equal intervals. The opening ( The upper and lower surfaces of the fixing plate (24) are respectively provided with a fixing plate (27), the outer side surface of the fixing plate (27) is provided with a guide rod (25), the needle box (23) is provided with a support ear (26), the needle box (23) is slidably connected to the guide rod (25) through the support ear (26), the outer side of the fixing plate (27) is provided with a rubber strip seat (28), the rubber strip seat (28) is provided with a rubber strip (29), the rubber strip (29) is provided with a needle plate (30), the needle plate (30) is provided with a needle hole (47) corresponding to the gripping needle (31), and the cam mechanisms are respectively provided on the page feeding roller (3), the page storage roller (5) and the page transfer roller (7 ), the cam mechanism comprises a cam support (17), a cam shaft (20) and a cam (21), the cam (21) being mounted on the cam shaft (20) at equal intervals, the cam shaft (20) being arranged on the cam support (17), a servo motor (13) being arranged on the outer side of the cam support (17), a driving wheel (18) being arranged on the output shaft of the servo motor (13), the driving wheel (18) being meshed with a driven wheel (19) on the cam shaft (20), a roller (22) being arranged on the other end of the elastic power shaft (32), the roller (22) being in rolling contact with the cam (21); the cover method comprises the following specific steps: Step 1: The page feed roller (3) performs a paper gripping action, the cut paper (46) enters between the page feed roller (3) and the guide roller (4), the gripping needle (31) on the page feed roller (3) extends out to grip the paper (46), and the guide roller (4) drives the paper (46) to move in the direction of the gap between the page feed roller (3) and the page storage roller (5); Step 2: The page storage roller (5) receives the paper (46), the paper (46) rotates to the junction of the page feeding roller (3) and the page storage roller (5), the gripper (31) on the page feeding roller (3) is retracted, and the gripper (31) on the page storage roller (5) extends to hold the paper (46), and the paper (46) is transferred from the page feeding roller (3) to the page storage roller (5), and the transferred paper (46) is driven by the gripper (31) to rotate with the page storage roller (5); Step 3: During the sheet-wrapping action, the paper (46) maintains normal paper (46) transfer between the sheet-feeding roller (3) and the sheet-storing roller (5). When the paper (46) rotates on the sheet-storing roller (5) to the intersection with the sheet-passing roller (7), the gripper (31) on the sheet-storing roller (5) does not retract, and the gripper (31) on the sheet-passing roller (7) does not extend. The paper (46) continues to follow the sheet-storing roller (5) and is wrapped around the roller and rotates. When the paper (46) rotates with the sheet-storing roller (5) to the intersection with the sheet-feeding roller (3), the gripper (31) on the sheet-storing roller (5) will continue to grip the second page and enter the next cycle. Step 4: Release the paper (46). When the page storage roller (5) stores the set number of pages, the paper (46) on the page storage roller (5) rotates to the intersection with the page transfer roller (7). The grippers (31) on the page storage roller (5) and the page transfer roller (7) move simultaneously, that is, the grippers (31) on the page storage roller (5) retract and the grippers (31) on the page transfer roller (7) extend. At this time, the grippers (31) on the page transfer roller (7) simultaneously grip the paper (46) that has completed the page transfer and enter the next action.

2. A rotary printing press overlay method according to claim 1, characterized in that: When there is no need to insert pages, in step 3, the gripper (31) on the page transfer roller (7) extends to grip the paper (46), the gripper (31) on the page storage roller (5) retracts, and the paper (46) is transferred from the page storage roller (5). Each time the page transfer roller (7) rotates one circle, a sheet of paper is ejected from the page transfer roller (7).

3. A rotary printing press overlay method according to claim 1, characterized in that: A needle seat (35) is provided on the needle box (23), and a needle body (40) and a guide portion (41) are provided at the lower part of the needle holder (31). The guide portion (41) is inserted into the needle seat (35) and is slidably connected to the needle seat (35). A limit plate (37) is provided at the upper end of the guide portion (41), and a spring 2 (36) is provided between the limit plate (37) and the inner wall of the needle box (23).

4. A rotary printing press overlay method according to claim 3, characterized in that: The needle body (40) and the guide portion (41) are designed as a separate structure, and the needle body (40) and the guide portion (41) are connected in a threaded manner.

5. A rotary printing press overlay method according to claim 1, characterized in that: A side frame (16) is arranged on the outer side of the cam bracket (17), and the side frame (16) is fixedly connected to the inner wall of the drum. An air suction pipe (11) is passed through the hollow shaft (14), and one end of the air suction pipe (11) passes through the drum. The other end of the air suction pipe (11) passes through the hollow shaft (14) and is fixedly connected to an outer frame (10) on the side of the wall panel (9). A flexible pipe (12) is connected to the outer end of the air suction pipe (11), and an air suction channel (43) is arranged at the center hole of the air suction pipe (11). An air suction hole (42) connected to the air suction channel (43) is arranged in the circumferential direction of the air suction pipe (11) located in the drum, and a through hole is opened in the circumferential direction of the drum.

6. A rotary printing press overlay method according to claim 1, characterized in that: An external transmission component (2) and a drive motor (1) are arranged on the outside of the wall panel (9).

7. A rotary printing press overlay method according to claim 1, characterized in that: A left limit roller (45) is arranged on the left side of the page storage roller (5), a right limit roller (6) is arranged on the right side of the page storage roller (5), and a lower limit roller (8) is arranged on the right side of the page transfer roller (7). Annular needle grooves (44) are respectively arranged on the page feed roller (3), the page storage roller (5), the page transfer roller (7), the guide roller (4), the left limit roller (45), the right limit roller (6) and the lower limit roller (8). The annular needle grooves (44) on the page feed roller (3), the page storage roller (5) and the page transfer roller (7) are staggered with each other, and the annular needle grooves (44) on the guide roller (4) correspond to the gripping needles (31) on the page feed roller (3).

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