Edge cutting and folding method for rotary press

Abstract

The invention discloses an edge-cutting and folding method for a rotary press, which comprises an edge-cutting and folding system for the rotary press, the edge-cutting and folding system comprises a paper pressing wheel, a traction wheel, a cutter mechanism, a page storage roller, a page conveying roller, a folding roller, a paper delivery roller, a paper collecting wheel and a conveying belt, the cutter mechanism comprises a cutting roller and a cutter roller, the cutting roller is provided with a cutting holding needle, and the cutter roller is provided with a cutting holding needle. A paper cutter is arranged on the cutter roller, a page storage holding needle is arranged on the page storage roller, a page conveying holding needle is arranged on the page conveying roller, an edge cutter and an edge cutter pad are arranged on the folding roller, and the edge cutter and the edge cutter pad are fixed on the folding roller through an edge cutter holder; according to the method, a traditional folding method is thoroughly changed, the method not only comprises the functions of cutting and page sleeving, but also has the function of cutting redundant lines on the edge of the ink-jet printing product, cutting aiming at the lines on the edge of the ink-jet printing product is carried out while stacking and page sleeving are completed, and the sleeve page can be directly folded into the needed product after being stacked and subjected to edge cutting.

Description

Technical Field

[0001] The invention relates to the technical field of trimming and folding of rotary printing machines, in particular to a trimming and folding method of a rotary printing machine. 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 do overlay on a traditional folding machine, the traditional method is to print multiple sets of hosts at the same time, bring the samples printed by multiple sets of hosts together through different paper paths, stack the sheets together, and then enter a folding machine for folding. This form of printing and folding has many disadvantages: it requires multiple sets of hosts, and the machine occupies too much space; multiple sets of hosts are expensive; if any of the paper paths has problems such as printing quality, paper change, and paper break, the folded products will be scrapped; more operators are required; to achieve overlay with a single machine group, it can only be done manually, with low work efficiency and high labor intensity. The traditional printing and overlaying methods are costly, consume a lot of manpower and material resources, and have obvious disadvantages.

[0003] With the advent of the digital printing era, the traditional plate-making has been abandoned. The mainframe part adopts the form of digital printing, and multiple printed products with different contents can be printed on one mainframe. For example, most newspapers have multiple contents, and some books and periodicals also have the need for overlapping pages. At the same time, since digital inkjet rotary printing machines are equipped with many inkjet heads, in order to maintain the transparency of the nozzle holes on the nozzles, a 3mm-5mm line will be sprayed on the edge of the paper before printing each printed product. However, this line is not required by the printed product. When printing newspapers, magazines and other products that do not require binding, since there is no subsequent binding process, it is necessary to add a separate cutting machine or other cutting equipment and process to cut off this line, which not only increases costs, but also consumes manpower, resulting in extended delivery time. Chinese patent application No. 202010371062.9 discloses a folding machine and a UV printing system, wherein the folding machine includes a top registration unit and a triangular plate for performing a first longitudinal fold on a paper tape, the folding needle roller and the cutting roller cooperate to rotate relative to each other, the outer edge of the folding needle roller is axially provided with a pricking needle and a cutting groove, and a double parallel folding roller is arranged above the page storage roller to cooperate with and rotate relative to the folding needle roller, and a gripper and a second folding knife are arranged on the outer edge of the double parallel folding roller; a page transfer mechanism is arranged on the side of the page storage roller away from the folding needle roller, which is mainly used for cutting and folding paper, and the pricking needle pierces the paper so that the paper is attached to the surface of the folding needle roller to cooperate to complete the cutting of the paper; the page-over function cannot be realized, and the printing system is a traditional printing method, which requires drying, and the paper feeding line is long, and cannot meet the requirements for trimming the paper strips.

[0004] Traditional rotary printing presses need to be equipped with a separate folding machine, which requires manual participation in page laying, has a long paper feed line, complicated processes, and low printing efficiency. Since there is no subsequent binding process, a cutting machine or other cutting equipment and processes need to be added separately to cut off this line, which not only increases costs, but also consumes manpower and prolongs delivery time. In view of the above problems, a rotary printing press cutting and folding method 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 trimming and folding pages of a rotary printing machine. The method completely changes the traditional folding method. The whole process does not require human intervention and has the advantages of quick operation and greatly saving equipment and labor costs. It not only includes cutting and overlapping pages, but also has the function of cutting excess lines on the edges of inkjet printed products. While completing the stacking of overlapping pages, it cuts the edge lines of the inkjet products, and can directly fold the overlapping pages into the required products after trimming the stack. No other redundant processes are required to complete the production from roll paper to folded pages, 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 press trimming and folding method, including a rotary printing press trimming and folding system, the system including a paper pressing wheel, a traction wheel, a cutting mechanism, a page storage drum, a page transfer drum, a folding drum, a paper discharge drum, a paper receiving wheel and a conveyor belt, the cutting mechanism including a cutting drum and a cutting drum, a cutting gripper is arranged on the cutting drum, a paper cutter is arranged on the cutting drum, a page storage gripper is arranged on the page transfer drum, a page transfer gripper is arranged on the folding drum, and a A trimming knife and a trimming knife pad are arranged, the trimming knife and the trimming knife pad are fixed on the folding cylinder through the trimming knife seat, the page transfer gripper drives the paper head and the trimming knife to have a relative misalignment, the folding cylinder is provided with a folding gripper and a movable folding knife, the paper discharge cylinder is provided with a movable clamping paper board and a fixed clamping paper board, the movable clamping paper board is controlled by a cam to open and close for paper delivery, and a paper guide device is arranged on one side of the paper guide device. The trimming folding method includes a single-page trimming folding mode; the single-page trimming folding mode is called mode one, and mode one includes the following specific steps: Step 1: Transverse cutting of the traction paper. The traction paper enters the cutting mechanism through the traction of the traction wheel and the pressure wheel. The paper cutter on the cutting drum cuts the traction paper transversely. The traction paper becomes the cut paper. While the paper is being cut, the cutting gripper holds the traction paper and transfers it to the page storage drum. Step 2: The first handover of the paper, when the paper cutter on the cutter drum moves to the tangent position with the page holding pin on the page holding drum, the page holding pin extends and the cutting pin retracts at the same time, at this time the cut paper is handed over to the page holding drum for the first time; Step 3: The second transfer of paper, the sheet-storage gripper drives the cut paper to continue rotating until it reaches the tangent position with the sheet-feeding roller. At this time, the sheet-storage gripper retracts and the sheet-feeding gripper extends. At this time, the paper is transferred to the sheet-feeding roller for the second time. Step 4: The third handover of the paper, the cut paper continues to be driven by the page feeding gripper to rotate with the page feeding roller. When it reaches the tangent position with the folding roller, the page feeding gripper drives the paper head and the trimming knife to have a relative misalignment. The trimming knife cuts the edge of the cut paper, and the folding gripper extends to hold the cut paper. The paper with the cut edge is handed over to the folding roller. At this time, the paper is handed over for the third time. Step 5: The fourth handover of the paper, when the folding gripper drives the paper with the cut edge to rotate with the folding drum and is tangent to the paper output drum, the movable folding knife in the middle of the paper extends from the folding drum, inserts the paper with the cut edge into the paper output drum, and the paper with the cut edge is clamped by the movable clamping paper and the fixed clamping paper to rotate, completing the folding action of the paper; Step 6: The paper with the cut edges is driven by the movable clamping paper and the fixed clamping paper to rotate with the paper output roller to the paper guide device. The clamping paper is released. Under the action of the paper guide device, the folded paper page falls smoothly into the paper receiving wheel. As the paper receiving wheel rotates, the paper page falls onto the conveyor belt under the action of gravity and is transported out of the machine by the conveyor belt, completing the trimming and folding of the single page.

[0007] Furthermore, the trimming and folding method also includes an overlay trimming and folding mode, which is called mode 2. Mode 2 includes the following specific steps: Step 1: The first handover of Mode 2 is the same as Mode 1; Step 2: When the cut paper is handed over for the second time, that is, when the sheet-keeping gripper drives the cut paper to rotate to the tangent position with the sheet-passing roller, the sheet-keeping gripper does not retract, that is, the sheet-passing roller still holds the cut paper and rotates, and at the same time, the sheet-passing gripper that should be extended to receive the paper does not extend. At this time, the cut paper is not handed over, and the cut paper will continue to be driven by the sheet-keeping gripper to wrap around the sheet-keeping roller. The paper continues to rotate with the sheet-keeping roller to the handover position with the cutting roller. At this time, the second cut paper can be received, and the two pages are stacked together, and the rotation continues to enter the next cycle until the set number of stacked sheets is reached; Step 3: When the stacked papers reach the second handover position, the page storage gripper retracts and the page transfer gripper extends out to handover the papers. At this time, the page transfer gripper is holding multiple sheets of paper, driving the stacked papers to reach the third handover position. Under the action of the trimming knife, multiple edges of the papers are cut off at the same time. Driven by the folding gripper, the papers are wrapped on the folding roller and rotated, and the stacked papers are folded backwards at the same time, completing the stacking, trimming and folding of multiple pages.

[0008] Furthermore, a paper brush wheel is provided at the lower left side of the page feeding roller, and a guide plate and a collection box are provided at the lower part of the page feeding roller. The cut paper strips are driven by the page feeding needle to continue to rotate, and are taken back above the guide plate. The cut paper strips fall on the guide plate and slide freely to the collection box below.

[0009] Furthermore, a paper pressing wheel and a paper guiding device are arranged at the upper right of the paper discharge roller, and the paper pressing wheel is tangent to the paper discharge roller.

[0010] Furthermore, the paper guiding device includes a paper guide paper, a paper baffle paper, a guide bracket, a connecting arm, a threaded rod and a fixed bracket. The fixed bracket is installed between the wall panels of the rotary printing press by bolts. One end of the threaded rod is fixedly connected to the fixed bracket by a nut, and the other end of the threaded rod is fixedly connected to the guide bracket. A connecting shaft is passed through the guide bracket, and both ends of the connecting shaft are respectively connected to connecting arms and fastened by nuts. The paper guide paper is fixed on the connecting arm, and the upper end of the paper guide paper corresponds to the paper output roller. A paper baffle paper is arranged on the outer side of the guide bracket. A paper receiving channel is formed between the paper baffle paper and the paper guide paper, and the paper receiving channel corresponds to the paper receiving roller.

[0011] Furthermore, a paper cutting tape holder and a knife cutting tape are arranged on the cutting cylinder, the knife cutting tape is fixed on the cutting cylinder via the paper cutting tape holder, a paper cutting knife holder and a knife cutting pad are arranged on the knife cutting cylinder, and the knife cutting pad and the paper cutting knife are fixed on the knife cutting cylinder via the paper cutting knife holder.

[0012] Furthermore, a page storage roller is provided with a page storage strip seat and a page storage strip, the page storage strip is fixed to the page storage roller via the page storage strip seat, a page storage movable cam and a page storage fixed cam are provided in the page storage roller, a page transfer strip seat and a page transfer strip are provided on the page transfer roller, the page transfer strip is fixed to the page transfer roller by the page transfer strip seat, a page transfer fixed cam and a page transfer movable cam are provided in the page transfer roller, and a movable folding knife cam and a folding needle cam are provided in the folding roller.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. This method completely changes the traditional folding method. The whole process does not require human intervention, has the advantages of fast operation, and greatly saves equipment and labor costs. It not only includes cutting and overlapping, but also has the function of cutting the excess lines on the edge of inkjet printed products. While completing the stacking of overlapping pages, it cuts the edge lines of inkjet products, and can directly stack the overlapping pages and fold them into the required products after cutting the edges. No other unnecessary processes are required to complete the production from roll paper to double-page folding.

[0014] 2. This method includes two working modes. The switching between overlapping pages and single pages can be flexibly set and controlled. During the printing process, the sprayed lines on the paper can be cut. The cutting position is accurate and the cutting width can be adjusted. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the trimming structure of the page transfer roller and the folding roller in cooperation with each other in the present invention; Figure 3 This is a schematic diagram of the matching structure of the movable folding knife and the clamping paper board of the present invention; Figure 4 It is a schematic structural diagram of the paper guiding device of the present invention; Figure 5 This is an axonometric view of the paper guide device of the present invention; Figure 6 It is a schematic diagram of the structure of the belt power transmission mechanism of the present invention.

[0016] In the figure: 1, a paper pressing wheel, 2, a traction wheel, 3, a traction paper, 4, a cutting roller, 5, a cutting gripper, 6, a cutting knife roller, 7, a cutting pad, 8, a cutting knife, 9, a cutting knife seat, 10, a cutting tape seat, 11, a cutting tape, 12, a cut paper, 13, a page storage roller, 14, a page storage tape seat, 15, a page storage gripper, 16, a page storage tape, 17, a page storage movable cam, 18, a page storage fixed cam, 19, a page transfer roller, 20, a page transfer fixed cam, 21, a page transfer movable cam, 22, a paper brush wheel, 23, a guide plate, 24, a collection box, 25, a page transfer tape seat, 26, a page transfer gripper, 27, a page transfer tape, 28, a cutting knife, 29 trimming knife seat, 30 trimming knife pad, 31 folding pin, 32 movable folding knife, 33 movable folding knife cam, 34 folding pin cam, 35 folding roller, 36 paper discharge roller, 37 movable clamping paper board, 38 fixed clamping paper board, 39 paper pressing wheel, 40 paper guide device, 41 paper sheet, 42 paper collection wheel, 43 conveyor belt, 44 page storage movable cam gear, 45 page transfer movable cam gear, 46 cam motor reducer, 47 transmission pinion, 48 paper guide paper, 49 paper collection channel, 50 paper stopper, 51 guide bracket, 52 connecting arm, 53 threaded rod, 54 fixed bracket, 55 connecting shaft. DETAILED DESCRIPTION

[0017] 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.

[0018] See also Figure 1-6The present invention provides a technical solution: a rotary printing press trimming and folding method, including a rotary printing press trimming and folding system, the system including a paper pressing wheel 1, a traction wheel 2, a cutting mechanism, a page storage roller 13, a page transfer roller 19, a folding roller 35, a paper discharge roller 36, a paper receiving roller 42 and a conveyor belt 43, the cutting mechanism including a cutting roller 4 and a cutting roller 6, the traction wheel 2 and the paper pressing wheel 1 press and pull the paper 3 to convey it in the direction of rotation of the roller, the cutting roller 4 is provided with a cutting gripper 5, and the cutting gripper 5 cuts as the paper 3 is cut. As the roller 4 rotates, the cutting gripper 5 can be extended or retracted. The telescopic driving structure of the cutting gripper 5 can be a cam that follows the rotation of the roller, or a reciprocating swing or a movable convex block or a connecting rod mechanism. The driving structure is an existing conventional technology and is not described in detail here. Different methods can be used according to actual use. A paper cutter 8 is provided on the cutting roller 6. All rollers in the folding system are installed between the wall panels of the rotary printing press and are arranged in an L shape, which makes the structure compact and saves equipment space. A page storage roller 13 is provided with a page storage The page feeder 19 is provided with a page feeder 26, and the folding cylinder 35 is provided with a trimming knife 28 and a trimming knife pad 30. The trimming knife 28 and the trimming knife pad 30 are fixed on the folding cylinder 35 through the trimming knife seat 29. The page feeder 26 drives the paper head and the trimming knife 28 to have a relative misalignment, thereby the relatively misaligned trimming knife 28 can perform the paper cutting action of the paper line. If the width or position of the line changes slightly, the trimming knife can be adjusted by adjusting the phase relationship between the page feeder 19 and the folding cylinder 35. The relative positions of the folding pin 28 and the folding gripper 31 on the folding cylinder 35 are changed to realize the change of the cutting paper edge width. The folding pin 31 and the movable folding knife 32 are arranged on the folding cylinder 35. The movable clamping paper 37 and the fixed clamping paper 38 are arranged on the paper discharge cylinder 36. The movable clamping paper 37 is controlled by a cam to open and close for paper delivery. A paper guide device 40 is arranged on one side of the paper guide device 40. The trimming and folding method includes a single-page trimming and folding mode; the single-page trimming and folding mode is called mode one, and mode one includes the following specific steps: Step 1: Transverse cutting of the traction paper 3. The traction paper 3 enters the cutting mechanism through the traction of the traction wheel 2 and the pressure wheel 1. The paper cutter 8 on the cutting drum 6 cuts the traction paper 3 transversely. The traction paper 3 becomes the cut paper 12. While the paper is being cut, the cutting gripper 5 holds the traction paper 3 and transfers it to the page storage drum 13. Step 2: The first handover of the paper, when the paper cutter 8 on the cutting drum 6 runs to the tangent position with the page storage gripper 15 on the page storage drum 13, the page storage gripper 15 extends, and the cutting gripper 5 retracts at the same time, and the cut paper 12 is first handed over to the page storage drum 13; Step 3: The second transfer of the paper, the sheet-storage gripper 15 drives the cut paper 12 to continue rotating, and reaches the tangent position with the sheet-passing roller 19, at which time the sheet-storage gripper 15 retracts and the sheet-passing gripper 26 extends, and the paper is transferred to the sheet-passing roller 19 for the second time; Step 4: The third handover of the paper, the cut paper 12 continues to be driven by the page feeding gripper 26 to rotate with the page feeding cylinder 19, and when it reaches the tangent position with the folding cylinder 35, the page feeding gripper 26 drives the paper head and the trimming knife 28 to have a relative misalignment, and the trimming knife 28 cuts the paper edge of the cut paper 12, and at the same time, the folding gripper 31 extends to hold the cut paper 12, and the paper with the cut paper edge is handed over to the folding cylinder 35, and the paper is handed over for the third time; Step 5: The fourth handover of the paper, when the folding gripper 31 drives the paper with the cut edge to rotate along with the folding roller 35 and is tangent to the paper discharge roller 36, the movable folding knife 32 in the middle of the paper extends from the folding roller 35, inserts the paper with the cut edge into the paper discharge roller 36, and the paper with the cut edge is clamped by the movable clamping paper 37 and the fixed clamping paper 38 to rotate, completing the folding action of the paper; The folding roller 35 can realize two actions: cutting the edge of the paper and folding the paper, thereby saving the number of rollers and reducing the cost and size of the equipment.

[0019] Step 6: The paper with the cut edges is driven by the movable clamping paper 37 and the fixed clamping paper 38 to rotate with the paper output roller 36 to the paper guide device 40, and the clamping paper is released. Under the action of the paper guide device 40, the folded paper sheet 41 smoothly falls into the paper receiving wheel 42. As the paper receiving wheel 42 rotates, the paper sheet 41 falls onto the conveyor belt 43 under the action of gravity, and is transported out of the machine by the conveyor belt 43, completing the trimming and folding work of the single page.

[0020] The trimming and folding method also includes a nesting trimming and folding mode, which is called a mode Second, mode 2 includes the following specific steps: Step 1: The first handover of Mode 2 is the same as Mode 1; Step 2: When the cut paper 12 is handed over for the second time, that is, when the sheet gripper 15 drives the cut paper 12 to rotate to the tangent position with the sheet transfer roller 19, the sheet gripper 15 should be retracted, but it does not retract under the action of the sheet storage cam 17, that is, the sheet transfer roller 19 still holds the cut paper 12 and rotates. At the same time, the sheet transfer gripper 26 that should be extended to receive the paper does not extend under the action of the sheet transfer cam 21. At this time, the cut paper 12 is not handed over, and the cut paper 12 will continue to be driven by the sheet gripper 15 to be wrapped on the sheet storage roller 13. The sheet continues to rotate with the sheet storage roller 13 to the handover position with the cutting roller 4. At this time, the second cut paper 12 can be received, and the two pages are stacked together, and the rotation continues to enter the next cycle until the set number of stacked sheets is reached; Step 3: When the stacked papers reach the second handover position, the page storage gripper 15 retracts and the page transfer gripper 26 extends out to hand over the papers. At this time, the page transfer gripper 26 is in a state of holding multiple sheets of paper, and drives the stacked papers to reach the third handover position. Under the action of the trimming knife 28, multiple paper edges are cut off at the same time, and continue to be driven by the folding gripper 31, wrapped on the folding roller 35 to rotate, and continue to fold the stacked multiple sheets of paper backwards at the same time, completing the stacking, trimming and folding of multiple pages.

[0021] A paper brush wheel 22 is arranged at the lower left side of the page passing roller 19. The brush on the paper brush wheel 22 is tangent to the page passing roller 19. When the cut paper strips are adsorbed on the page passing roller 19, the paper strips are brushed off by the paper brush wheel 22 to ensure stable operation of the equipment. A guide plate 23 and a collecting box 24 are arranged below the page passing roller 19. The paper brush wheel 22 has the same rotation direction as the page passing roller 19. The cut paper strips are driven by the page passing gripper 26 to continue to rotate, and are taken back above the guide plate 23. The cut paper strips fall on the guide plate 23 and slide freely to the collecting box 24 below. The function of the paper brush wheel 22 is to assist the cut paper edges to fall smoothly into the collecting box 24; the cut paper edges can also be collected by blowing, or by negative pressure extraction devices and other collection methods.

[0022] A paper pressing wheel 39 and a paper guide device 40 are arranged at the upper right of the paper discharge roller 36. The paper pressing wheel 39 is tangent to the paper discharge roller 36, and the paper pressing wheel 39 plays a role of pressing the paper to prevent the paper wrapped in the paper discharge roller 36 from curling up.

[0023] The paper guide device 40 includes a paper guide 48, a paper stopper 50, a guide bracket 51, a connecting arm 52, a threaded rod 53 and a fixing bracket 54. The fixing bracket 54 is installed between the wall panels of the rotary printing press by bolts. One end of the threaded rod 53 is fixedly connected to the fixing bracket 54 by a nut, and the other end of the threaded rod 53 is fixedly connected to the guide bracket 51. A connecting shaft 55 is passed through the guide bracket 51. Both ends of the connecting shaft 55 are respectively connected to the connecting arms 52 and are fastened by nuts. The connecting shaft 55 can be rotated by loosening the nuts. 5, and then the angle of the connecting arm 52 can be adjusted, so as to adjust the paper discharge angle. The paper guide 48 is fixed on the connecting arm 52, and the upper end of the paper guide 48 corresponds to the paper discharge roller 36. A paper stopper 50 is arranged on the outer side of the guide bracket 51, and a paper receiving channel 49 is formed between the paper stopper 50 and the paper guide 48. The paper receiving channel 49 corresponds to the paper receiving wheel 42. The movable paper clamping paper 37 is actuated to release the paper, and the folded paper falls into the paper receiving channel 49, and then falls into the paper receiving wheel 42 through the paper receiving channel 49.

[0024] A paper cutting tape seat 10 and a knife cutting tape 11 are provided on the cutting cylinder 4, and the knife cutting tape 11 is fixed on the cutting cylinder 4 via the paper cutting tape seat 10. A paper cutting knife seat 9 and a knife pad 7 are provided on the knife cutting cylinder 6, and the knife pad 7 and the knife 8 are fixed on the knife cutting cylinder 6 by the knife seat 9. The cutting gripper 5 can be other grippers, paper clips, etc. that can transfer paper, as long as the paper transfer action can be completed, and it can be changed according to actual use. This part is a conventional means in the prior art.

[0025] The page storage drum 13 is provided with a page storage tape seat 14 and a page storage tape 16, and the page storage tape 16 is fixed to the page storage drum 13 via the page storage tape seat 14. The page storage drum 13 is provided with a page storage movable cam 17 and a page storage fixed cam 18. The page storage gripper 15 can be controlled to extend and retract by the page storage fixed cam 18, and can also be controlled to extend and retract by the page storage movable cam 17. The page transfer drum 19 is provided with a page transfer tape seat 25 and a page transfer tape 27, and the page transfer tape 27 is fixed to the page transfer drum 19 by the page transfer tape seat 25. The page transfer drum 19 is provided with a page transfer fixed cam 20 and a page transfer movable cam 21. The page transfer gripper 26 can be controlled to extend and retract by the page transfer fixed cam 20, and can also be controlled to extend and retract by the page transfer movable cam 21. Retraction action, the folding roller 35 is provided with an active folding knife cam 33 and a folding gripper cam 34, the page storage gripper 15, the page transfer gripper 26, and the folding gripper 31 can be other grippers, paper clips, etc. that can transfer paper, as long as the paper transfer action can be completed, it can be changed according to actual use, the cutter rubber strip 11, the page storage rubber strip 16, and the page transfer rubber strip 27 are all for pressing the paper when the gripper pierces the paper, so that the gripper can ensure the stability of the paper when gripping the paper, the page storage active cam 17 and the page transfer active cam 21 can be in the form of cams that rotate with the roller, or can be reciprocating swings, or active protrusions or connecting rod mechanisms can directly control other devices of the page storage gripper 15 and the page transfer gripper 26, and different methods can be adopted according to actual use.

[0026] A power transmission machine is arranged on the outer side of the wall panel of the rotary printing press, and the power transmission mechanism includes a gear set and a motor; the power transmission mechanism is a conventional technology in the field, for example, the page storage movable cam gear 44 and the page transfer movable cam gear 45 are respectively fixed to the page storage movable cam 17 and the page transfer movable cam 21, and are used to transmit and control the cam action, and the cam motor reducer 46 transmits power to the page storage movable cam gear 44 and the page transfer movable cam gear 45 through the transmission pinion 47 for cam synchronization control.

[0027] 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 trimming and folding pages of a rotary printing press, characterized in that: The invention relates to a rotary printing press cutting and folding system, the system comprising a paper pressing wheel (1), a traction wheel (2), a cutting mechanism, a page storage roller (13), a page transfer roller (19), a folding roller (35), a paper discharge roller (36), a paper receiving wheel (42) and a conveyor belt (43); the cutting mechanism comprising a cutting roller (4) and a cutting roller (6); a cutting gripper (5) is arranged on the cutting roller (4); a paper cutter (8) is arranged on the cutting roller (6); a page storage gripper (15) is arranged on the page storage roller (13); a page transfer gripper (26) is arranged on the page transfer roller (19); a cutting knife (28) and a cutting knife pad (30) are arranged on the folding roller (35); ), the trimming knife (28) and the trimming knife pad (30) are fixed on the folding roller (35) through the trimming knife seat (29), the page transfer gripper (26) drives the paper head and the trimming knife (28) to have a relative displacement, the folding roller (35) is provided with a folding gripper (31) and a movable folding knife (32), the paper discharge roller (36) is provided with a movable clamping paper board (37) and a fixed clamping paper board (38), the movable clamping paper board (37) is controlled by a cam to open and close for paper delivery, and a paper guide device (40) is provided on one side of the paper guide device (40). The trimming and folding method includes a single-page trimming and folding mode; the single-page trimming and folding mode is called mode one, and mode one includes the following specific steps: Step 1: horizontal cutting of the traction paper (3), the traction paper (3) enters the cutting mechanism through the traction of the traction wheel (2) and the pressure wheel (1), the paper cutter (8) on the cutting roller (6) cuts the traction paper (3) horizontally, and the traction paper (3) becomes the cut paper (12). While the paper is being cut, the cutting gripper (5) grips the traction paper (3) and transfers it to the sheet storage roller (13); Step 2: The first handover of the paper, when the paper cutter (8) on the cutting drum (6) moves to a position tangent to the page storage gripper (15) on the page storage drum (13), the page storage gripper (15) extends and the cutting gripper (5) retracts, and at this time the cut paper (12) is first handed over to the page storage drum (13); Step 3: The second transfer of the paper, the sheet-storing gripper (15) drives the cut paper (12) to continue rotating until it reaches a tangent position with the sheet-passing roller (19), at which time the sheet-storing gripper (15) retracts and the sheet-passing gripper (26) extends, and the paper is transferred for the second time and enters the sheet-passing roller (19); Step 4: The third transfer of the paper, the cut paper (12) continues to be driven by the sheet transfer gripper (26) to rotate with the sheet transfer roller (19), and when it reaches the tangent position with the folding roller (35), the sheet transfer gripper (26) drives the paper head and the edge trimming knife (28) to have a relative misalignment, and the edge trimming knife (28) cuts the edge of the cut paper (12), and at the same time, the folding gripper (31) extends to hold the cut paper (12), and the paper with the cut edge is transferred to the folding roller (35), and the paper is transferred for the third time; Step 5: The fourth handover of the paper, when the folding gripper (31) drives the paper with the cut edges to rotate along with the folding roller (35) to a tangent position with the paper discharge roller (36), the movable folding knife (32) in the middle of the paper extends from the folding roller (35) to insert the paper with the cut edges into the paper discharge roller (36), and the paper with the cut edges is clamped by the movable clamping paper (37) and the fixed clamping paper (38) to rotate, thereby completing the folding action of the paper; Step 6: The paper with the trimmed edges is driven by the movable clamping paper (37) and the fixed clamping paper (38) to rotate along with the paper discharge roller (36) to the paper guide device (40). The clamping paper is released. Under the action of the paper guide device (40), the folded paper sheet (41) smoothly falls into the receiving paper wheel (42). As the receiving paper wheel (42) rotates, the paper sheet (41) falls onto the conveyor belt (43) under the action of gravity and is transported out of the machine by the conveyor belt (43), completing the trimming and folding work of the single page.

2. A rotary printing press trimming and folding method according to claim 1, characterized in that: The trimming and folding method also includes a nesting trimming and folding mode, which is called mode 2. Mode 2 includes the following specific steps: Step 1: The first handover of Mode 2 is the same as Mode 1; Step 2: When the cut paper (12) is transferred for the second time, that is, when the sheet-storing gripper (15) drives the cut paper (12) to rotate to a position tangent to the sheet-passing roller (19), the sheet-storing gripper (15) does not retract, that is, the sheet-passing roller (19) still holds the cut paper (12) and rotates, and at the same time, the sheet-passing gripper (26) that should be extended to receive the paper does not extend. At this time, the cut paper (12) is not transferred, and the cut paper (12) will continue to be driven by the sheet-storing gripper (15) to be wrapped around the sheet-storing roller (13). The sheet continues to rotate with the sheet-storing roller (13) to a position of transfer with the cutting roller (4). At this time, the second cut paper (12) can be received, and the two sheets are stacked together, and the rotation continues to enter the next cycle until the set number of stacked sheets is reached; Step 3: When the stacked sheets of paper arrive at the second handover position, the page storage gripper (15) retracts and the page transfer gripper (26) extends to transfer the sheets of paper. At this time, the page transfer gripper (26) is in a state of holding a plurality of sheets of paper, and drives the stacked sheets of paper to reach the third handover position. Under the action of the edge trimming knife (28), the edges of the plurality of sheets of paper are cut off at the same time, and the sheets of paper are continuously driven by the folding gripper (31) to be wrapped around the folding roller (35) and rotated, and the stacked plurality of sheets of paper are continuously folded backwards at the same time, thereby completing the stacking, edge trimming and folding of the plurality of sheets of paper.

3. A rotary printing press trimming and folding method according to claim 2, characterized in that: A paper brush wheel (22) is arranged at the lower left of the page transfer roller (19), and a guide plate (23) and a collection box (24) are arranged below the page transfer roller (19). The cut paper strips are driven by the page transfer gripper (26) to continue rotating and are retrieved above the guide plate (23). The cut paper strips fall on the guide plate (23) and slide freely onto the collection box (24) below.

4. A rotary printing press trimming and folding method according to claim 1, characterized in that: A paper pressing wheel (39) and a paper guiding device (40) are arranged on the upper right side of the paper discharge roller (36), and the paper pressing wheel (39) is tangent to the paper discharge roller (36).

5. A method for trimming and folding pages of a rotary printing press according to claim 4, characterized in that: The paper guide device (40) comprises a paper guide (48), a paper stopper (50), a guide bracket (51), a connecting arm (52), a threaded rod (53) and a fixing bracket (54). The fixing bracket (54) is installed between wall panels of the rotary printing press by means of bolts. One end of the threaded rod (53) is fixedly connected to the fixing bracket (54) by means of a nut. The other end of the threaded rod (53) is fixedly connected to the guide bracket (51). A connecting shaft (55) is passed through the guide bracket (51). Both ends of the connecting shaft (55) are respectively connected to the connecting arms (52) and fastened by nuts. The paper guide (48) is fixed to the connecting arm (52). The upper end of the paper guide (48) corresponds to the paper discharge roller (36). A paper stopper (50) is arranged on the outer side of the guide bracket (51). A paper receiving channel (49) is formed between the paper stopper (50) and the paper guide (48). The paper receiving channel (49) corresponds to the paper receiving wheel (42).

6. A method for trimming and folding pages of a rotary printing press according to claim 1, characterized in that: A paper cutting tape seat (10) and a cutting knife tape (11) are arranged on the cutting roller (4); the cutting knife tape (11) is fixed to the cutting roller (4) via the paper cutting tape seat (10); a paper cutting knife seat (9) and a cutting knife pad (7) are arranged on the cutting knife roller (6); the cutting knife pad (7) and the paper cutting knife (8) are fixed to the cutting knife roller (6) via the paper cutting knife seat (9).

7. The method for trimming and folding a rotary printing press according to claim 1, characterized in that: The page storage roller (13) is provided with a page storage strip seat (14) and a page storage strip (16), the page storage strip (16) is fixed to the page storage roller (13) via the page storage strip seat (14), the page storage roller (13) is provided with a page storage movable cam (17) and a page storage fixed cam (18), the page transfer roller (19) is provided with a page transfer strip seat (25) and a page transfer strip (27), the page transfer strip (27) is fixed to the page transfer roller (19) by the page transfer strip seat (25), the page transfer roller (19) is provided with a page transfer fixed cam (20) and a page transfer movable cam (21), and the folding roller (35) is provided with a movable folding knife cam (33) and a folding needle cam (34).

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