A method for trimming and folding of a rotary printing press

Abstract

The present invention discloses a trimming and folding method for a rotary printing press, including a trimming and folding system for a rotary printing press. The system includes a paper pressing wheel, a traction wheel, a cutting mechanism, a page storage drum, a page transfer drum, a folding drum, a paper output drum, a paper receiving wheel, and a conveyor belt. The cutting mechanism includes a cutting cylinder and a cutting knife cylinder. Cutting grippers are provided on the cutting cylinder, and a cutting knife is provided on the cutting knife cylinder. Page storage grippers are provided on the page storage drum, and page transfer grippers are provided on the page transfer drum. A trimming knife and a trimming knife pad are provided on the folding drum, and the trimming knife and the trimming knife pad are fixed to the folding drum through a trimming knife seat. This method completely changes the traditional folding method. It not only includes cutting and page nesting, but also has the function of cutting the redundant lines on the edge of an inkjet printed product. While completing the stacked page nesting, it performs the cutting of the edge lines of the inkjet product, and can directly fold the trimmed and nested pages into the required product after folding.

Description

Technical Field

[0001] The present invention relates to the technical field of trimming and folding of rotary printing presses, and specifically to a trimming and folding method for rotary printing presses. Background Art

[0002] Rotary printing presses are generally equipped with folding machines. Since only one set of printing plates can be mounted on the printing part for printing each time, the folding machine can only perform single-sheet folding. Therefore, the traditional folding machine can only fold single copies of printed sheets each time. When it is necessary to perform multi-page folding on a traditional folding machine, the traditional method is that multiple main machines need to print simultaneously. The proof sheets printed by multiple main machines are sent together through different paper paths. After stacking the printed sheets together, they are then fed into a folding machine for folding. This form of printing and folding has many drawbacks: multiple main machines are required, taking up too much floor space; the cost of multiple main machines is expensive; when there are problems such as printing quality, paper change, or paper breakage in any one of the paper paths, all the folded products will be scrapped; more operators are required; to achieve multi-page folding with a single-unit printing, only manual multi-page folding can be carried out, with very low work efficiency and high labor intensity. The traditional method of printing and multi-page folding has high costs, consumes a large amount of manpower and material resources, and has obvious disadvantages.

[0003] With the advent of the digital printing era, the traditional plate-making is abandoned, and the main machine part adopts the form of digital printing. Multiple printed products with different contents can be printed on one main machine. For example, most newspapers have multiple contents, and some books and periodicals also have multi-page requirements; at the same time, since digital inkjet rotary printing presses are equipped with many inkjet heads, in order to keep the nozzles on the inkjet heads clear, a 3mm - 5mm line will be sprayed on the edge of the paper before printing each printed product. However, this line is not required for the printed product. When printing products such as newspapers and magazines that do not require binding, since there are no subsequent binding processes, a separate cutting machine or other cutting equipment and processes need to be added to cut off this line, which not only increases the cost but also consumes manpower, resulting in an extended delivery time; Chinese Patent Application No. 202010371062.9 discloses a folding machine and a UV printing system. The folding machine includes a top margin registration unit, a triangle plate for performing the first longitudinal fold on the paper tape, a folding needle drum and a cutting drum that cooperate and rotate relative to each other. The outer edge of the folding needle drum is axially provided with stabbing needles and cutting grooves. Above the page storage drum, a double-parallel folding drum that cooperates and rotates relative to it is provided. The outer edge of the double-parallel folding drum is provided with grippers and a second folding knife; a sheet transfer mechanism is provided on one side of the page storage drum away from the folding needle drum. This mechanism is mainly used for paper cutting and folding. The provided stabbing needles pierce the paper to make the paper adhere to the surface of the folding needle drum to cooperate and complete the cutting of the paper; it cannot achieve the multi-page folding function. This printing system is a traditional printing method that requires drying and has a long paper path, and cannot meet the trimming requirements for paper strips.

[0004] Traditional rotary printing presses require a separate folder, manual intervention for page alignment, a long paper path, complex processes, and low printing efficiency. Since there are no subsequent binding processes, a separate cutting machine or other cutting equipment and processes are required to cut off this line, which not only increases costs but also consumes manpower, resulting in extended delivery times. In response to the above problems, a method for trimming and folding on a rotary printing press 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 on a rotary printing press. This method completely changes the traditional folding method. The entire process requires no manual intervention, is fast and convenient to operate, and greatly saves equipment and labor costs. It not only includes cutting and page alignment but also has the function of trimming the excess lines on the edges of inkjet-printed products. While completing the stacked page alignment, it trims the edges of the inkjet products and can directly fold the trimmed and stacked pages into the required products. The production from a roll of paper to a folded double-page can be completed without other redundant processes, effectively solving the problems in the background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: A method for trimming and folding on a rotary printing press, including a trimming and folding system for a rotary printing press. The system includes a paper pressing wheel, a traction wheel, a cutting mechanism, a page storage drum, a page transfer drum, a folding drum, a paper output drum, a paper receiving wheel, and a conveyor belt. The cutting mechanism includes a cutting drum and a cutting knife drum. The cutting drum is provided with cutting grippers, and the cutting knife drum is provided with a paper cutter. The page storage drum is provided with page storage grippers, the page transfer drum is provided with page transfer grippers, the folding drum is provided with a trimming knife and a trimming knife pad. The trimming knife and the trimming knife pad are fixed on the folding drum through a trimming knife seat. The page transfer grippers drive the paper head to have a relative displacement with the trimming knife. The folding drum is provided with folding grippers and a movable folding knife. The paper output drum is provided with a movable clamping plate and a fixed clamping plate. The movable clamping plate is controlled by a cam to open and close for paper transfer. A guiding device is provided on one side of the guiding device. This trimming and folding method includes a single-page trimming and folding mode; the single-page trimming and folding mode is called Mode 1, and Mode 1 includes the following specific steps:

[0007] Step 1: Transverse cutting of the traction paper. The traction paper is drawn into the cutting mechanism through the traction of the traction wheel and the paper pressing wheel. The paper cutter on the cutting knife drum transversely cuts the traction paper, and the traction paper becomes the cut paper. At the same time as the paper is cut, the cutting grippers hold the traction paper and transfer it to the page storage drum.

[0008] Step 2: The first transfer of the paper. When the paper cutter on the cutting knife drum runs to a position tangent to the page storage grippers on the page storage drum, the page storage grippers extend, and at the same time, the cutting grippers retract. At this time, the cut paper undergoes the first transfer and enters the page storage drum.

[0009] Step 3: The second handover of the paper. The page storage gripper needle drives the cut paper to continue rotating until it reaches the position tangent to the transfer drum. At this time, the page storage gripper needle retracts, and the transfer gripper needle extends. Then the paper undergoes the second handover and enters the transfer drum.

[0010] Step 4: The third handover of the paper. The cut paper continues to be driven by the transfer gripper needle and rotates with the transfer drum. When it reaches the position tangent to the folding drum, due to a relative dislocation between the transfer gripper needle driving the paper head and the edge cutting knife, the edge cutting knife cuts the paper edge of the cut paper. At the same time, the folding gripper needle extends to grip the cut paper, and the paper with the cut edge is handed over to the folding drum. At this time, the paper undergoes the third handover.

[0011] Step 5: The fourth handover of the paper. When the paper with the cut edge driven by the folding gripper needle rotates with the folding drum to the position tangent to the paper output drum, the movable folding knife in the middle of the paper extends from the folding drum and inserts the paper with the cut edge into the paper output drum. The paper with the cut edge is clamped by the movable clamping paper board and the fixed clamping paper board and rotates to complete the paper folding action.

[0012] Step 6: The paper with the cut edge is driven by the movable clamping paper board and the fixed clamping paper board to rotate with the paper output drum to the paper guiding device. The clamping paper board releases the paper. Under the action of the paper guiding device, the folded paper page smoothly falls into the paper collecting wheel. As the paper collecting wheel rotates, the paper page falls onto the conveyor belt under the action of gravity and is conveyed out of the machine by the conveyor belt, completing the single-page edge cutting and folding work.

[0013] Furthermore, the edge cutting and folding method further includes a nested page edge cutting and folding mode, which is called Mode 2. Mode 2 includes the following specific steps:

[0014] Step 1: The first handover of Mode 2 is the same as that of Mode 1.

[0015] Step 2: When the second handover of the cut paper is carried out, that is, when the page storage gripper needle drives the cut paper to rotate to the position tangent to the transfer drum, the page storage gripper needle does not retract. That is, the transfer drum still grips the cut paper and rotates. At the same time, the transfer gripper needle that should have extended to receive the paper does not extend. At this time, the cut paper is not handed over. The cut paper will continue to be driven by the page storage gripper needle and wrapped around the page storage drum. The paper continues to rotate with the page storage drum to the handover position with the cutting drum. At this time, it can catch the second cut paper, stack the two pages together, continue to rotate, and enter the next cycle until the set number of stacked pages is reached.

[0016] Step 3: When the nested papers reach the second handover position, the page storage gripper pins retract, and the page transfer gripper pins extend to hand over the papers. At this time, the page transfer gripper pins are in the state of gripping multiple papers. When driving the nested papers to reach the third handover position, under the action of the edge trimming knife, the edges of multiple papers are trimmed simultaneously. Then, under the drive of the folding gripper pins, they rotate while being wrapped around the folding drum and continue to perform the simultaneous folding operation on multiple papers stacked backward, completing the operations of nested page edge trimming and folding for multiple pages.

[0017] Further, a paper brushing brush wheel is arranged at the lower left of the page transfer drum, a guide plate and a collection box are arranged below the page transfer drum. The cut paper strips are driven by the page transfer gripper pins to continue rotating, retract above the guide plate, and the cut paper strips fall on the guide plate and freely slide onto the collection box below.

[0018] Further, a paper pressing wheel and a paper guiding device are arranged at the upper right of the paper output drum, and the paper pressing wheel is tangent to the paper output drum.

[0019] Further, the paper guiding device includes a paper guide board, a baffle board, a guiding support, a connecting arm, a threaded rod, and a fixing frame. The fixing frame is installed between the wallboards of the rotary printing machine through bolts. One end of the threaded rod is fixedly connected to the fixing frame through a nut, and the other end of the threaded rod is fixedly connected to the guiding support. A connecting shaft passes through the guiding support, and both ends of the connecting shaft are respectively connected with connecting arms and fastened through nuts. The paper guide board is fixed on the connecting arm, the upper end of the paper guide board corresponds to the paper output drum, a baffle board is arranged outside the guiding support, and a paper receiving channel is formed between the baffle board and the paper guide board, and the paper receiving channel corresponds to the paper receiving wheel.

[0020] Further, a cutting rubber strip seat and a cutting knife rubber strip are arranged on the cutting drum, the cutting knife rubber strip is fixed on the cutting drum through the cutting rubber strip seat, a cutting knife seat and a cutting knife pad are arranged on the cutting knife drum, and the cutting knife pad and the cutting knife are fixed on the cutting knife drum through the cutting knife seat.

[0021] Further, a page storage rubber strip seat and a page storage rubber strip are arranged on the page storage drum, the page storage rubber strip is fixed on the page storage drum through the page storage rubber strip seat, a page storage movable cam and a page storage fixed cam are arranged in the page storage drum, a page transfer rubber strip seat and a page transfer rubber strip are arranged on the page transfer drum, the page transfer rubber strip is fixed on the page transfer drum through the page transfer rubber strip seat, a page transfer fixed cam and a page transfer movable cam are arranged in the page transfer drum, and a movable folding knife cam and a folding gripper pin cam are arranged in the folding drum.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1. This method completely changes the traditional folding method. The whole process requires no manual participation, has the advantages of fast operation and greatly saves equipment and labor costs. It not only includes cutting and collating, but also has the function of cutting the redundant lines on the edge of the inkjet printed product. While completing the stacking and collating, it cuts the edge lines of the inkjet product, and can directly fold the product into the required form after collating, stacking and edge cutting, and can complete the production from the web to the folio folding without other redundant processes.

[0024] 2. This method includes two working modes, and the switching between collating and single sheet can be flexibly set and controlled. During the printing process, it can cut the sprayed lines on the paper, with accurate cutting position and adjustable cutting width. Description of the Drawings

[0025] Figure 1 Schematic diagram of the structure of the present invention;

[0026] Figure 2 Schematic diagram of the structure of the page transfer cylinder and the folding cylinder of the present invention for edge cutting in cooperation;

[0027] Figure 3 Schematic diagram of the structure of the movable cutting knife and the clamping paper board of the present invention in cooperation;

[0028] Figure 4 Schematic diagram of the structure of the paper guiding device of the present invention;

[0029] Figure 5 Axonometric view of the paper guiding device of the present invention;

[0030] Figure 6 Schematic diagram of the structure of the power transmission mechanism of the present invention.

[0031] In the figure: 1 paper pressing wheel, 2 traction wheel, 3 traction paper, 4 cutting roller, 5 cutting gripper needle, 6 cutter roller, 7 cutter pad, 8 paper cutter, 9 paper cutter seat, 10 paper cutting rubber strip seat, 11 paper cutting rubber strip, 12 cut paper, 13 page storage roller, 14 page storage rubber strip seat, 15 page storage gripper needle, 16 page storage rubber strip, 17 page storage movable cam, 18 page storage fixed cam, 19 page transfer roller, 20 page transfer fixed cam, 21 page transfer movable cam, 22 paper brushing brush wheel, 23 guide plate, 24 collection box, 25 page transfer rubber strip seat, 26 page transfer gripper needle, 27 page transfer rubber strip, 28 edge trimming knife, 29 edge trimming knife seat, 30 edge trimming knife pad, 31 folding gripper needle, 32 movable folding knife, 33 movable folding knife cam, 34 folding gripper needle cam, 35 folding roller, 36 paper output roller, 37 movable paper clamping plate, 38 fixed paper clamping plate, 39 paper pressing wheel, 40 paper guiding device, 41 paper sheet, 42 paper receiving wheel, 43 conveyor belt, 44 page storage movable cam gear, 45 page transfer movable cam gear, 46 cam motor reducer, 47 transmission pinion, 48 guide paper board, 49 paper receiving channel, 50 baffle plate, 51 guide bracket, 52 connecting arm, 53 threaded rod, 54 fixing bracket, 55 connecting shaft. Detailed implementation manner

[0032] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention, rather than indicating or implying 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 construed as a limitation to the present invention.

[0033] Please refer to Figure 1-6, the present invention provides a technical solution: a method for trimming and folding a rotary printing press, including a trimming and folding system for a rotary printing press. The system includes a paper pressing wheel 1, a traction wheel 2, a cutting mechanism, a page storage drum 13, a page transfer drum 19, a folding drum 35, a paper output drum 36, a paper receiving wheel 42, and a conveyor belt 43. The cutting mechanism includes a cutting drum 4 and a cutting knife drum 6. The traction wheel 2 and the paper pressing wheel 1 tightly press and traction the paper 3 to be conveyed in the rotation direction of the drum. The cutting drum 4 is provided with cutting gripper pins 5, and the cutting gripper pins 5 rotate with the cutting drum 4. The cutting gripper pins 5 can extend or retract. The telescopic driving structure of the cutting gripper pins 5 can be in the form of a cam following the rotation of the drum, or can be a reciprocating swing, a movable convex block, or a connecting rod mechanism. This driving structure is a conventional technology in the art and will not be described in detail here. Different methods can be adopted according to actual use. The cutting knife drum 6 is provided with a cutting knife 8. All the drums in this folding system are installed between the side walls of the rotary printing press and are arranged in an L shape, making the structure compact and saving equipment space. The page storage drum 13 is provided with page storage gripper pins 15, the page transfer drum 19 is provided with page transfer gripper pins 26, and the folding drum 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 drum 35 through a trimming knife seat 29. The page transfer gripper pins 26 drive the paper head to have a relative dislocation with the trimming knife 28. Due to this relative dislocation, the trimming knife 28 can perform the trimming action on the paper edge of the paper line. If the width or position of the line changes slightly, the phase relationship between the page transfer drum 19 and the folding drum 35 can be adjusted to change the relative position of the trimming knife 28 and the folding gripper pins 31 on the folding drum 35 to achieve the change of the trimming paper edge width. The folding drum 35 is provided with folding gripper pins 31 and a movable folding knife 32. The paper output drum 36 is provided with a movable paper clamping plate 37 and a fixed paper clamping plate 38. The movable paper clamping plate 37 is controlled by a cam to open and close for paper transfer. A paper guiding device 40 is provided on one side of the paper guiding device 40. This trimming and folding method includes a single-page trimming and folding mode; the single-page trimming and folding mode is called Mode 1, and Mode 1 includes the following specific steps:

[0034] Step 1: Transverse cutting of the paper 3. The paper 3 to be conveyed enters the cutting mechanism through the traction of the traction wheel 2 and the paper pressing wheel 1. The cutting knife 8 on the cutting knife drum 6 transversely cuts the paper 3 to be conveyed, and the paper 3 to be conveyed becomes the cut paper 12. At the same time as the paper is cut, the cutting gripper pins 5 hold the paper 3 to be conveyed and transfer it to the page storage drum 13.

[0035] Step 2: The first transfer of the paper. When the cutting knife 8 on the cutting knife drum 6 runs to a position tangent to the page storage gripper pins 15 on the page storage drum 13, the page storage gripper pins 15 extend, and at the same time the cutting gripper pins 5 retract. At this time, the cut paper 12 undergoes the first transfer and enters the page storage drum 13.

[0036] Step 3: Second handover of the paper. The page storage gripper 15 drives the cut paper 12 to continue rotating until it reaches the position tangent to the page transfer cylinder 19. At this time, the page storage gripper 15 retracts and the page transfer gripper 26 extends. Then the paper undergoes the second handover and enters the page transfer cylinder 19;

[0037] Step 4: Third handover of the paper. The cut paper 12 continues to rotate with the page transfer cylinder 19 driven by the page transfer gripper 26. When it reaches the position tangent to the folding cylinder 35, due to a relative misalignment between the page transfer gripper 26 driving the paper head and the edge cutting knife 28, the edge cutting knife 28 cuts the paper edge of the cut paper 12. At the same time, the folding gripper 31 extends to grip the cut paper 12, and the paper with the cut edge is transferred to the folding cylinder 35. At this time, the paper undergoes the third handover;

[0038] Step 5: Fourth handover of the paper. When the paper with the cut edge driven by the folding gripper 31 rotates with the folding cylinder 35 to the position tangent to the paper output cylinder 36, the movable folding knife 32 in the middle of the paper extends from the folding cylinder 35 and inserts the paper with the cut edge into the paper output cylinder 36. The paper with the cut edge is clamped by the movable clamping plate 37 and the fixed clamping plate 38 and rotates to complete the paper folding action;

[0039] On the folding cylinder 35, two actions of cutting the edge of the lined paper and folding the paper can be realized, saving the number of cylinders, reducing costs and the size of the equipment.

[0040] Step 6: The paper with the cut edge is driven by the movable clamping plate 37 and the fixed clamping plate 38 to rotate with the paper output cylinder 36 to the paper guiding device 40. The clamping plate releases, and under the action of the paper guiding device 40, the folded paper page 41 smoothly falls into the paper collecting wheel 42. As the paper collecting wheel 42 rotates, the paper page 41 falls onto the conveyor belt 43 under the action of gravity and is conveyed out of the machine by the conveyor belt 43 to complete the edge cutting and folding work of a single page.

[0041] This edge cutting and folding method also includes a multi-page edge cutting and folding mode, and the multi-page edge cutting and folding mode is called Mode

[0042] Two. Mode Two includes the following specific steps:

[0043] Step 1: The first handover in Mode Two is the same as that in Mode One;

[0044] Step 2: When the second handover of the cut paper 12 is carried out, that is, when the page storage gripper needle 15 drives the cut paper 12 to rotate to the tangential position with the page transfer drum 19, the page storage gripper needle 15 should have retracted, but under the action of the page storage live cam 17, it does not retract. That is, the page transfer drum 19 still holds the cut paper 12 and rotates. At the same time, the page transfer gripper needle 26 that should have extended to pick up the paper does not extend under the action of the page transfer live cam 21. At this time, the cut paper 12 is not handed over. The cut paper 12 will continue to be driven by the page storage gripper needle 15 and wrapped around the page storage drum 13. The paper continues to rotate with the page storage drum 13 to the handover position with the cutting drum 4. At this time, it can catch the second cut paper 12, stack the two pages together, continue to rotate, and enter the next cycle until the set number of stacked pages is reached;

[0045] Step 3: When the stacked paper reaches the second handover position, the page storage gripper needle 15 retracts, and the page transfer gripper needle 26 extends to hand over the paper. At this time, the page transfer gripper needle 26 is in the state of holding multiple sheets of paper. When driving the stacked paper to reach the third handover position, under the action of the edge trimming knife 28, the edges of multiple sheets of paper are trimmed at the same time. Then, under the drive of the folding gripper needle 31, it rotates while being wrapped around the folding drum 35, and continues to perform the folding work of multiple stacked sheets of paper backward at the same time, completing the work of page stacking, edge trimming, and folding of multiple pages.

[0046] A paper brushing brush wheel 22 is arranged at the lower left of the page transfer drum 19. The brush on the paper brushing brush wheel 22 is tangent to the page transfer drum 19. When the cut paper strip is adsorbed on the page transfer drum 19, the paper strip is brushed off by the paper brushing brush wheel 22 to ensure the stable operation of the equipment. A guide plate 23 and a collection box 24 are arranged below the page transfer drum 19. The paper brushing brush wheel 22 rotates in the same direction as the page transfer drum 19. The cut paper strip is driven by the page transfer gripper needle 26 to continue rotating, and is retracted above the guide plate 23 when it reaches there. The cut paper strip falls on the guide plate 23 and freely slides to the lower collection box 24. The function of the paper brushing brush wheel 22 is to assist in smoothly dropping the cut paper edge into the collection box 24; The cut paper edge can also be collected by means such as blowing or a negative pressure exhaust device.

[0047] A paper pressing wheel 39 and a paper guiding device 40 are arranged at the upper right of the paper output drum 36. The paper pressing wheel 39 is tangent to the paper output drum 36, and the paper pressing wheel 39 is used to press the paper to prevent the paper wrapped around the paper output drum 36 from warping.

[0048] The paper guiding device 40 includes a paper guide plate 48, a baffle plate 50, a guiding bracket 51, a connecting arm 52, a threaded rod 53 and a fixing bracket 54. The fixing bracket 54 is installed between the wallboards of the rotary printing press by bolts. One end of the threaded rod 53 is fixedly connected to the fixing bracket 54 through a nut, and the other end of the threaded rod 53 is fixedly connected to the guiding bracket 51. A connecting shaft 55 passes through the guiding bracket 51. Both ends of the connecting shaft 55 are respectively connected with the connecting arm 52 and fastened by nuts. Loosening the nuts can rotate the connecting shaft 55, and then the angle of the connecting arm 52 can be adjusted, so as to adjust the paper outlet angle. The paper guide plate 48 is fixed on the connecting arm 52. The upper end of the paper guide plate 48 corresponds to the paper outlet roller 36. A baffle plate 50 is arranged on the outer side of the guiding bracket 51. A paper receiving channel 49 is formed between the baffle plate 50 and the paper guide plate 48. The paper receiving channel 49 corresponds to the paper receiving wheel 42. The movable clamping paper plate 37 acts to release the paper. 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.

[0049] A paper cutting rubber strip seat 10 and a paper cutting rubber strip 11 are arranged on the paper cutting roller 4. The paper cutting rubber strip 11 is fixed on the paper cutting roller 4 through the paper cutting rubber strip seat 10. A paper cutting knife seat 9 and a paper cutting knife pad 7 are arranged on the paper cutting knife roller 6. The paper cutting knife pad 7 and the paper cutting knife 8 are fixed on the paper cutting knife roller 6 by the paper cutting knife seat 9. The paper cutting gripper needle 5 can be other grippers, clamping paper plates, etc. that can transfer the paper, as long as they can complete the paper transfer action, and can change according to actual use. This part is a conventional means in the prior art.

[0050] A page storage rubber strip seat 14 and a page storage rubber strip 16 are provided on the page storage cylinder 13. The page storage rubber strip 16 is fixed on the page storage cylinder 13 through the page storage rubber strip seat 14. A page storage movable cam 17 and a page storage fixed cam 18 are arranged in the page storage cylinder 13. The page storage picking needle 15 can be controlled by the page storage fixed cam 18 to extend and retract, and can also be controlled by the page storage movable cam 17 to extend and retract. A page transfer rubber strip seat 25 and a page transfer rubber strip 27 are provided on the page transfer cylinder 19. The page transfer rubber strip 27 is fixed on the page transfer cylinder 19 through the page transfer rubber strip seat 25. A page transfer fixed cam 20 and a page transfer movable cam 21 are arranged in the page transfer cylinder 19. The page transfer picking needle 26 can be controlled by the page transfer fixed cam 20 to extend and retract, and can also be controlled by the page transfer movable cam 21 to extend and retract. A movable folding knife cam 33 and a folding picking needle cam 34 are arranged in the folding cylinder 35. The page storage picking needle 15, the page transfer picking needle 26, and the folding picking needle 31 can be other picking teeth, clamping paper boards, etc. that can transfer paper. As long as the paper transfer action can be completed, it can be changed according to actual use. The cutting knife rubber strip 11, the page storage rubber strip 16, and the page transfer rubber strip 27 are all used to press the paper when the picking needle penetrates the paper, so as to ensure the stability of the paper when the picking needle picks up the paper. The page storage movable cam 17 and the page transfer movable cam 21 can follow the rotation of the cylinder in the form of a cam, or can reciprocate, or other devices such as movable bumps or link mechanisms that can directly control the page storage picking needle 15 and the page transfer picking needle 26 can be adopted according to actual use in different ways.

[0051] A power transmission mechanism is provided on the outer side of the wallboard of the rotary printing machine. The power transmission mechanism includes a gear set and a motor; this 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 for transmitting the control of the cam action. The cam motor reducer 46 transmits power from the transmission pinion 47 to the page storage movable cam gear 44 and the page transfer movable cam gear 45 for synchronous control of the cam.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. Without departing from the spirit and scope of the present invention, the present invention has various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.

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 page 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 roller (13) is provided with a page storage gripper (15); a page transfer roller (19) is provided with a page transfer gripper (26); and a folding roller (35) is provided with a paper discharge roller (36). The 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 a trimming knife seat (29), the page transfer gripper (26) drives the paper head and the trimming knife (28) to have a relative misalignment, the folding cylinder (35) is provided with a folding gripper (31) and a movable folding knife (32), the paper discharge cylinder (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 thereof. 40, a paper pressing wheel (39) and a paper guide device (40) are arranged on the upper right of the paper discharge roller (36), and the paper pressing wheel (39) is tangent to the paper discharge roller (36); the paper guide device (40) includes a paper guide plate (48), a paper stop plate (50), a guide bracket (51), a connecting arm (52), a threaded rod (53) and a fixing bracket (54), and 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), and the guide bracket (54) is fixedly connected to the guide bracket (51). 1) A connecting shaft (55) is passed through the upper surface, and connecting arms (52) are connected to both ends of the connecting shaft (55) and fastened by nuts, a 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), and the paper receiving channel (49) corresponds to the paper receiving wheel (42); 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 cut 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), and 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; 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); 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.

2. A rotary printing press trimming and folding method according to claim 1, 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.

3. 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).

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