A high-precision cutting method for book printing paper

Abstract

The present invention discloses a high-precision cutting method for book printing paper, which relates to the technical field of book processing. The high-precision cutting method for book printing paper includes the following steps: Step 1: Obtain the position where the book binding part of the book should be placed on the cutting table of the paper cutter according to the book size; Step 2: Adjust the horizontal position of the paper press of the paper cutter through the position of the book on the cutting table so that the paper press avoids the binding part of the book; Step 3: Control the paper press to move downward and press the book with the horizontal position of the paper press in Step 2; Step 4: Control the cutting knife of the paper cutter to cut the book obliquely downward starting from the side close to the binding side of the book. The high-precision cutting method for book printing paper uses a paper press that can avoid the binding part to press the book, thereby avoiding the damage of the binding part caused by directly pressing the paper press on the binding part, and there is no need for operators to use cushion blocks, improving the cutting efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of book processing, and in particular to a high-precision cutting method for book printing paper. Background Art

[0002] When printing products like books and newspapers, different types of paper are used as raw materials. To ensure aesthetically pleasing, consistent, and standardized layouts, the paper needs to be cut, and this process requires the use of a paper trimmer. When using the perfect binding process for books, the three non-perfect edges of the book must be trimmed after the binding is complete to ensure a neat appearance.

[0003] For example, refer to Figure 1 The book is divided into a binding side 110 and a non-binding side 120. The binding side 110 has a binding portion 111. After binding, two convex glues 112 are often formed at both ends of the binding portion 111. Figure 1 The status shown.

[0004] In cutting Figure 1 When cutting a book, the book is usually placed directly under the cutter of the book cutting machine, and the cutter is in a state of cutting downward. When cutting, it should be noted that the binding side 110 of the book should be close to the cutting side of the cutter, for example, Figure 2 The cutting direction of the cutting knife 10 is from the upper left corner to the lower right corner, so the binding side 110 of the book should be located on the left side, so as to avoid the edge bursting of the book after cutting.

[0005] In the prior art, a paper press is required to press the book before it is cut by the cutting knife to prevent the book from tilting during the cutting process. However, the paper press in the prior art is a flat plate structure. When it presses down, it also exerts pressure on the glue-bound side 110 of the book. This pressure causes a certain amount of pressure loss on the glue-bound portion 111, resulting in a decrease in the gluing performance. In addition, since the overall thickness of the glue-bound portion 111 is slightly greater than that of the non-glue-bound side 120, when the paper press is pressed on the glue-bound portion 111, it will also cause an unbalanced pressure on the non-glue-bound side 120, affecting the cutting accuracy. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present invention provides a high-precision cutting method for book printing paper, which solves the problem in the prior art that the downward pressure of the paper presser will generate pressure on the binding part and affect the cutting accuracy.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: A method for high-precision cutting of book printing paper, comprising the following steps:

[0008] Step 1: Obtain the position where the book binding part of the book should be placed on the cutting table of the paper cutter according to the book size;

[0009] Step 2: Adjust the horizontal position of the paper presser of the paper cutter through the position of the book on the cutting table so that the paper presser avoids the binding part of the book;

[0010] Step 3: Control the paper presser to move downward and press the book with the horizontal position of the paper presser in Step 2;

[0011] Step 4: Control the cutting knife of the paper cutter to cut the book obliquely downward starting from the side close to the binding side of the book.

[0012] Furthermore, a gantry is provided above the cutting table, and the cutting knife is installed below the gantry; the paper cutter further includes a first tooth part, which is located on the rear side of the upper surface of the cutting table close to the binding side of the book, and there is a first gap between two adjacent first tooth parts; the first tooth part is used to block the book and limit the cutting size of the book, and the first gap is used to avoid the convex glue at the end of the binding side of the book.

[0013] Furthermore, the paper presser includes a pressing strip, and an avoidance groove is provided on the pressing strip, and the position of the avoidance groove is opposite to the position of the first gap, for avoiding the binding part of the book.

[0014] Furthermore, the pressing strip is a rectangular pressing strip, and an avoidance groove one is provided on each outer surface of the rectangular pressing strip, and the four avoidance grooves one are evenly arranged in the length direction of half of the rectangular pressing strip, and one avoidance groove one corresponds to one first gap, and the avoidance groove one is used to avoid the binding part of the book;

[0015] It further includes a flipping motor, which is located on the gantry and is used to drive the rectangular pressing strip to rotate so that the avoidance grooves one at different positions on the rectangular pressing strip can all face downward the binding part of the book.

[0016] Furthermore, the pressing strip includes two groups of rectangular pressing strips arranged side by side up and down, each rectangular pressing strip has four outer surfaces, and an avoidance groove one is provided on each outer surface of the rectangular pressing strip. The avoidance grooves one on one rectangular pressing strip are distributed on the first quarter section of this rectangular pressing strip, and the avoidance grooves one on the other rectangular pressing strip are distributed on the second quarter section of this rectangular pressing strip, and one avoidance groove one corresponds to one first gap;

[0017] Both ends of the two rectangular pressing strips are provided with first bearing seats, and a flipping motor for independently controlling the rotation of the two rectangular pressing strips is arranged in the first bearing seats;

[0018] A second bearing seat is provided on the side of the first bearing seat away from the rectangular pressing strip, and a revolution motor is arranged in the second bearing seat for adjusting the relative positions of the two rectangular pressing strips.

[0019] Further, the pressing strip is a cylindrical pressing strip, and the outer surface of the cylindrical pressing strip is spirally arranged with avoiding grooves III. Each avoiding groove III is an arc-shaped structure, and there is no axially overlapping area between two adjacent avoiding grooves III. The flipping motor is used to drive the cylindrical pressing strip to rotate so that different avoiding grooves III can face the binding part of the book.

[0020] Further, the pressing strip includes a second carrier, a sliding table and a telescopic bolt. A pressing table is arranged below one side of the second carrier away from the binding side of the book, and a second tooth part is arranged below the other side of the second carrier. Avoiding grooves II are formed between two adjacent second tooth parts. The sliding table is located in the avoiding groove II. The telescopic bolt is threadedly connected to the second carrier in the vertical direction, and the lower end of the telescopic bolt is rotatably connected to the sliding table; after the sliding table descends, the lower surface of the sliding table is flush with the lower surface of the second tooth part.

[0021] Further, convex parts are arranged on both sides of the lower end of the second tooth part, and both sides below the sliding table are adapted to the convex parts.

[0022] Further, an infrared emitter is arranged in the first gap, and the infrared emitter is used to emit infrared rays; the binding side of the book obtained in step one is located on the path of the infrared rays emitted by any one of the infrared emitters.

[0023] Further, the cutting knife is installed on a tool rest. Oblique grooves are formed on both sides of the tool rest. Fixed guide rods are arranged in the areas of the gantry opposite to the oblique grooves. A reciprocating assembly for pushing and pulling the tool rest is arranged on one side of the cutting table so that the fixed guide rods and the oblique grooves move relative to each other to form a state where the cutting knife cuts obliquely.

[0024] The present invention has the following beneficial effects:

[0025] (1) In this high-precision cutting method for book printing paper, by using a paper pressing device that can avoid the binding part to press down the book, the phenomenon that the binding part is damaged due to the paper pressing device directly pressing on the binding part can be avoided, and the pressure is relatively balanced, so the cutting efficiency can be improved.

[0026] (2) In this high-precision cutting method for book printing paper, infrared emitters are arranged on the rear baffle. The positions of the light rays emitted by the infrared emitters are consistent with the positions of the first gap and the avoiding grooves on the rear baffle. Thus, the operator can directly place the binding part of the book on any light ray to achieve the avoidance of the binding part and the avoidance of the protruding glue.

[0027] Certainly, when implementing any product of the present invention, it is not necessarily required to achieve all the above-mentioned advantages simultaneously. Description of the Drawings

[0028] Figure 1 It is a schematic diagram of a book to be cut in the prior art;

[0029] Figure 2 is the cutting direction diagram of the cutting knife for the book in the prior art;

[0030] Figure 3 is the process flow diagram of the present invention;

[0031] Figure 4 is the front view of the paper cutter of the present invention;

[0032] Figure 5 is the rear view of the paper cutter of the present invention;

[0033] Figure 6 is the assembly diagram of the rectangular pressing strip in the first embodiment of the present invention;

[0034] Figure 7 of the present invention Figure 5 is the state diagram of placing the book;

[0035] Figure 8 is the structural schematic diagram of the rear baffle of the present invention;

[0036] Figure 9 is the light position diagram emitted by the infrared emitter in the area near the center line of the cutting table of the present invention;

[0037] Figure 10 is the light position diagram emitted by the infrared emitter in the area near the outside of the cutting table of the present invention;

[0038] Figure 11 is the structural schematic diagram of the rectangular pressing strip in the first embodiment of the present invention;

[0039] Figure 12 is the external view of the reciprocating component of the present invention;

[0040] Figure 13 is the first perspective structural diagram of the reciprocating component of the present invention;

[0041] Figure 14 is the second perspective structural diagram of the reciprocating component of the present invention;

[0042] Figure 15 is the state diagram of the bookbinding part of the book in the first embodiment of the present invention below the first avoidance groove;

[0043] Figure 16 is the state diagram of the bookbinding part of the book in the first embodiment of the present invention below the second avoidance groove;

[0044] Figure 17 is the structural schematic diagram of the rectangular pressing strip in the second embodiment of the present invention;

[0045] Figure 18State diagram of one of the rectangular pressing strips pressing on a book in the second embodiment of the present invention;

[0046] Figure 19 Relative position diagram of the cylindrical pressing strip and the rear baffle in the third embodiment of the present invention;

[0047] Figure 20 Structural schematic diagram of the cylindrical pressing strip in the third embodiment of the present invention;

[0048] Figure 21 Relative position diagram of the avoidance groove three and the binding part when the cylindrical pressing strip presses on the book in the third embodiment of the present invention;

[0049] Figure 22 For Figure 21 Schematic diagram of the cylindrical pressing strip pressing on the non-binding area of the book in;

[0050] Figure 23 Perspective view of the cylindrical pressing strip of the present invention;

[0051] Figure 24 Assembly drawing of the paper press in the fourth embodiment of the present invention;

[0052] Figure 25 Relative position diagram of the paper press and the rear baffle in the fourth embodiment of the present invention;

[0053] Figure 26 For Figure 25 Enlarged view of area A in;

[0054] Figure 27 State diagram of the paper press pressing down on the book in the fourth embodiment of the present invention.

[0055] ]>In the figure, 1. Gantry; 2. Cutting table; 3. Rear baffle; 31. First carrier; 32. Solid area; 33. First tooth part; 34. First gap; 41. Second carrier; 42. Pressing table; 43. Second tooth part; 431. Side convex part; 44. Sliding table; 45. Telescopic bolt; 46. Second avoidance groove; 5. Rectangular pressing strip; 51. First avoidance groove; 52. First rotating shaft; 6. Flipping motor; 7. Cylindrical pressing strip; 71. Third avoidance groove; 8. First bearing seat; 9. Second bearing seat; 10. Cutting knife; 11. Tool holder; 12. Third bearing seat; 13. Infrared emitter; 14. Reciprocating component; 141. Cutting motor; 142. Belt drive structure; 143. Transmission shaft; 144. Driving bevel gear; 145. Driven bevel gear; 146. First connecting rod; 147. Second connecting rod; 15. Pressing frame; 16. Pressure cylinder; 17. Inclined groove; 18. Fixed guide rod; 110. Binding side; 111. Binding part; 112. Convex glue; 120. Non-binding side; 19. Infrared ray. Detailed implementation manners

[0056] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0057] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating the orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0058] The following is based on Figures 1 - 27 to describe the high-precision cutting method for book printing paper provided by the embodiments of the present invention.

[0059] Embodiment 1:

[0060] Please refer to Figure 3 , the embodiments of the present invention provide a high-precision cutting method for book printing paper, including the following steps:

[0061] Step 1: Obtain the position where the book binding part 111 should be placed on the cutting table 2 of the paper cutter according to the book size;

[0062] Step 2: Adjust the horizontal position of the paper presser of the paper cutter through the position of the book on the cutting table 2 so that the paper presser avoids the book binding part 111;

[0063] Step 3: Control the paper presser to move downward and press the book with the horizontal position of the paper presser in Step 2;

[0064] Step 4: Control the cutting knife 10 of the paper cutter to cut the book obliquely downward starting from the side close to the book binding part 111.

[0065] The high-precision cutting method for book printing paper provided by the embodiments of the present invention presses the book by using a paper presser that can avoid the book binding part 111, thereby avoiding the damage phenomenon of the book binding part 111 caused by the paper presser directly pressing on the book binding part 111 and improving the cutting accuracy.

[0066] Combined with Figure 4 , Figure 5 , Figure 12 and Figure 13As shown, specifically, the above-mentioned paper cutter also includes a gantry 1, which is located above the cutting table 2. A knife holder 11 is also provided on the gantry 1, and a cutting knife 10 is mounted on the knife holder 11. Bevel grooves 17 are provided on both sides of the knife holder 11. A fixed guide rod 18 is provided in the area opposite to the bevel groove 17 on the gantry 1. A reciprocating assembly 14 for pushing and pulling the knife holder 11 is provided on one side of the cutting table 2. When the reciprocating assembly 14 is working, the fixed guide rod 18 and the bevel groove 17 are moved relative to each other, thereby forming a state in which the cutting knife 10 is inclined cutting.

[0067] Combine Figure 5 and Figure 6 As shown, in order to adjust the cutting size of the book by the cutting blade 10 before cutting, the above-mentioned paper trimmer also includes a rear baffle 3. When the book to be cut is placed on the upper surface of the cutting table 2, the rear baffle 3 is used to block the rear end of the book. The rear baffle 3 can move in the front and rear directions to adjust the distance between itself and the cutting blade 10. The closer it is to the cutting blade 10, the further it pushes the book forward, and the larger the size of the waste material cut from the book.

[0068] Regarding the power for the back and forth movement of the tailgate 3, it can be driven by various methods such as cylinder drive, electric telescopic rod drive, etc. Since this is a well-known technology in the prior art and is not the focus of the invention of this application, it will not be described here.

[0069] Specific, combined Figure 7 and Figure 8 As shown, the rear baffle 3 includes a carrier 31 spanning the cutting table 2, a solid area 32 is provided on the front side of the carrier 31 near the non-binding side 120, and a tooth portion 33 is provided on the front side of the carrier 31 near the binding side 110, with a gap 34 between two adjacent tooth portions 33; the tooth portion 33 and the solid area 32 are used to block the book and limit the cutting size of the book, and the gap 34 is used to avoid the convex glue 112 at the end of the binding portion 111 of the book, so as to prevent the convex glue 112 from being blocked by the tooth portion 33 and causing the entire book to be in a tilted state.

[0070] Preferably, the boundary area between the solid area 32 and the tooth portion 1 33 should be located in the center area of the carrier 1 31 and on the center line of the cutting table 2, so that books of various sizes can find the position where their glue binding part 111 and convex glue 112 can be placed on the cutting table 2 near the side of the tooth portion 1 33.

[0071] Furthermore, in order to facilitate the operator to know the location of each gap 34 when standing in front of the gantry 1, an infrared transmitter 13 is provided in the gap 34. The infrared transmitter 13 is used to emit infrared rays. The book binding portion 111 obtained in step 1 is located on the path of the infrared rays emitted by any infrared transmitter 13. The infrared rays can be transmitted to the front of the gantry 1.Figure 4 The mid-infrared ray 19 is the light emitted by the infrared ray emitter 13 within one of the gaps 34. When the staff member is working in front of the gantry 1, the gluing part 111 can be aligned with the infrared ray 19 and the book can be directly pushed to the position of the rear baffle 3, so as to ensure that the protruding glue 112 can be aligned with the gap 34.

[0072] It should be noted that the operator can know the infrared ray 19 that should be aligned according to the size of the book. For example, Figure 9 in the state shown, when the size of the book is small, the operator turns on the infrared ray emitter 13 near the center of the cutting table 2. On the contrary, when the size of the book is large, for example, Figure 10 in the state shown, the operator turns on the infrared ray emitter 13 near the edge area of the cutting table 2.

[0073] The above-mentioned paper presser includes a pressing strip. The pressing strip has a plurality of outer surfaces, and each outer surface of the pressing strip is provided with a relief groove, and each relief groove does not coincide axially on the pressing strip and is in a staggered state. The positions of the respective relief grooves are opposite to the positions of different gaps 34. The relief groove is used to avoid the book gluing part 111, so as to prevent the pressing strip from pressing the gluing part 111 when pressing the book, and ensure the gluing stability of the gluing part 111.

[0074] Preferably, a rubber pad for buffering is wrapped on the outer surface of the pressing strip to avoid leaving indentations on the book.

[0075] As Figure 6 shown, in order to enable the relief grooves in all directions to face the book gluing part 111 downward, a turning motor 6 is also provided. The turning motor 6 is arranged on the gantry 1 and is used to drive the pressing strip to rotate, so that the relief grooves at different positions on the rectangular pressing strip 5 can all face the book gluing part 111 downward.

[0076] As Figure 11 shown, preferably, the above-mentioned pressing strip is a rectangular pressing strip 5. The rectangular pressing strip 5 has four longer surfaces, and each outer surface of the rectangular pressing strip 5 is provided with a relief groove 51. A total of four relief grooves 51 are provided. These four relief grooves 51 are evenly arranged in the length direction of one half of the rectangular pressing strip 5. One relief groove 51 corresponds to one gap 34. The relief groove 51 is used to avoid the book gluing part 111; and for the installation of the infrared ray emitter 13 in the gap 34 mentioned above, there should only be an infrared ray emitter 13 in the area of the gap 34 opposite to the relief groove 51 (a total of four infrared ray emitters 13 in this implementation), and no infrared ray emitter 13 is installed in the remaining gaps 34.

[0077] It should be noted that in this implementation, when the operator cuts a book, the glued part 111 of the book has four alignment stations, that is, on the paths of the light rays emitted by the four infrared emitters 13 in the implementation. When the glued part 111 of the book aligns with any one of the light rays, the raised glue 112 of the book is located within the gap 34, and the glued part 111 is also in the position aligning with the avoidance groove 51, improving the operation efficiency.

[0078] In addition, rotating shafts 52 are provided at both ends of the rectangular pressing strip 5, and third bearing seats 12 are provided on the rotating shafts 52. When the flipping motor 6 works, it can drive one of the rotating shafts 52 to rotate, and then realize the flipping of the rectangular pressing strip 5 ( Figure 15 and Figure 16 are state diagrams of different avoidance grooves 51 facing the book, Figure 15 the rectangular pressing strip 5 in Figure 16 can be flipped 90° to form the state shown in

[0079] As Figure 6 shown, the above-mentioned flipping motor 6 is installed inside the third bearing seat 12. A pressing frame 15 is provided below the cutting table 2, the upper end of the pressing frame 15 is fixed to the third bearing seat 12, and a pressure cylinder 16 for driving the pressing frame 15 to lift and lower is also provided below the cutting table 2, so as to realize the pressing down and pressure release of the rectangular pressing strip 5; preferably, slide rails for up and down guiding are provided for the third bearing seat 12 on the gantry 1 to ensure the vertical pressing down of the rectangular pressing strip 5.

[0080] Combined with Figures 12 - 14 shown, the reciprocating assembly 14 of the above-mentioned cutting knife 10 includes a second connecting rod 147 hinged to one side of the tool rest 11. At the other end of the second connecting rod 147, a first connecting rod 146 is hinged. A cutting motor 141 is assembled below the cutting table 2. A transmission shaft 143 is provided on the gantry 1. A belt drive structure 142 is provided between the transmission shaft 143 and the cutting motor 141. A driving bevel gear 144 is also provided on the transmission shaft 143, and the driving bevel gear 144 meshes with a driven bevel gear 145 on the side close to the first connecting rod 146. When the driven bevel gear 145 rotates, the first connecting rod 146 and the second connecting rod 147 cooperate to enable the tool rest 11 to reciprocate, realizing the inclined cutting of the cutting knife 10.

[0081] During use (when working), according to the size of the batch of books to be cut, obtain the position where the glued part 111 of the book should be placed on the cutting table 2 of the paper cutter. For example, if the book is larger, the width of the cutting table 2 occupied by it is larger at this time. Therefore, the corresponding gap 34 and avoidance groove 51 for its raised glue 112 and glued part 111 should be in the position of the area close to the edge of the cutting table 2. So it can be located at the position of the leftmost avoidance groove 51 in the state shown in Figure 15 . Before cutting, the operator should turn on the one corresponding to Figure 15The infrared emitter 13 opposite the leftmost avoidance groove 51, and control the flipping motor 6 to make the rectangular pressing strip 5 form Figure 15 The state shown (the state where the leftmost avoidance groove 51 faces downward), and then the staff adjusts the width of the cut waste. After the above process is ready, the book can be placed on the cutting table 2. When placing, the operator should align the glued part 111 of the book with the light emitted by the infrared emitter 13, so that at this time the protruding glue 112 is aligned with the gap 34, and the glued part 111 is aligned with the avoidance groove 51. After the book is placed, the pressure cylinder 16 works to press the rectangular pressing strip 5 against the book. After pressing, the glued part 111 is in a state of being avoided, and then the reciprocating assembly 14 works to drive the cutting knife 10 to cut the non-glued side 120 of the book.

[0082] In fact, in addition to the non-glued side 120 adjacent to the glued part 111, there are two other non-glued parts. After cutting the non-glued side 120, take out the book and flip the book to cut the other non-glued side 120 adjacent to the glued part 111. Finally, rotate the book 90°, adjust the position of the rear baffle 3 so that the last uncut position of the book is aligned with the cutting knife 10, and then use the paper presser to press down, and then cutting can be carried out.

[0083] Embodiment 2:

[0084] Combined with Figure 17 And Figure 18 As shown, the difference between this embodiment and Embodiment 1 is that this embodiment sets two sets of rectangular pressing strips 5 arranged side by side up and down. Each rectangular pressing strip 5 has four outer surfaces, and each outer surface of the rectangular pressing strip 5 is provided with an avoidance groove 51. One avoidance groove 51 corresponds to one gap 34, and the avoidance grooves 51 on the upper and lower rectangular pressing strips 5 do not coincide. The avoidance grooves 51 on one rectangular pressing strip 5 are distributed on the first quarter section of this rectangular pressing strip 5, and the avoidance grooves 51 on the other rectangular pressing strip 5 are distributed on the second quarter section of this rectangular pressing strip 5. As Figure 17 Shown, the four avoidance grooves 51 on the upper side are located on the second quarter section, and the four avoidance grooves 51 on the lower side are located on the first quarter section.

[0085] Preferably, both ends of the two rectangular pressing strips 5 are provided with first bearing seats 8. The first bearing seats 8 are provided with flipping motors 6 that independently control the rotation of the two rectangular pressing strips 5, so that the two rectangular pressing strips 5 can rotate independently and adjust the directions of the avoidance grooves 51 on them. In addition, a second bearing seat 9 is provided on the side of the first bearing seat 8 away from the rectangular pressing strip 5. The second bearing seat 9 is provided with a revolution motor for adjusting the relative positions of the two rectangular pressing strips 5, so that different avoidance grooves 51 on different rectangular pressing strips 5 can be aligned with the glued part 111.

[0086] In this implementation, two rectangular pressing strips 5 are used to form eight first avoidance grooves 51, so that infrared emitters 13 can be arranged in all eight first gaps 34. Thus, there can be eight placement positions for the book on the cutting table 2. Compared with the four placement positions in the first embodiment, the operator has a greater degree of freedom in placing the book. When the cutting knife 10 cuts the book, there are eight initial cutting positions to choose from, enabling each position of the cutting knife 10 to serve as an effective cutting section, and avoiding the serious local wear of the cutting knife 10 caused by repeatedly using several common positions of the cutting knife 10.

[0087] Embodiment Three:

[0088] Combined with Figures 19 - 23 As shown, the difference between this embodiment and the above two embodiments is that the pressing strip of the paper press in this embodiment is a cylindrical pressing strip 7. A third avoidance groove 71 is spirally arranged on the outer surface of a section of the cylindrical pressing strip 7. Each single third avoidance groove 71 is an arc-shaped structure, and there is no axially overlapping area between two adjacent third avoidance grooves 71. The flipping motor 6 is used to drive the cylindrical pressing strip 7 to rotate, so that different third avoidance grooves 71 can face the binding part 111 of the book.

[0089] In this implementation, using the cylindrical pressing strip 7 can also set eight third avoidance grooves 71, so that the required third avoidance groove 71 can be directly adjusted to face downward by rotating the cylindrical pressing strip 7. Compared with the second embodiment where a revolution motor needs to be added to increase the number of placement positions, the structure of this implementation is simpler.

[0090] As Figure 21 shown, when the cylindrical pressing strip 7 presses the book downward, the binding part 111 enters the lower third avoidance groove 71. Figure 22 For Figure 21 the state diagram of the cylindrical pressing strip 7 pressing on the book in the state.

[0091] Embodiment Four:

[0092] Combined with Figures 24 - 27 As shown, the difference between this embodiment and the above three embodiments is that the paper press includes a second carrier 41, a sliding table 44 and a telescopic bolt 45. A pressing table 42 is provided below one side of the second carrier 41 away from the book binding side 110, and a second tooth part 43 is provided below the other side of the second carrier 41. An avoidance groove 46 is formed between two adjacent second tooth parts 43. The sliding table 44 is located in the avoidance groove 46. The telescopic bolt 45 is threadedly connected to the second carrier 41 in the vertical direction, and the lower end of the telescopic bolt 45 is rotatably connected to the sliding table 44. After the sliding table 44 descends, the lower surface of the sliding table 44 is flush with the lower surface of the second tooth part 43. Thus, when the paper press presses downward, it presses the book in a state where the lower surfaces are flush.

[0093] In this embodiment, rubber pads are provided on the lower surface of the sliding table 44, the lower surface of the second tooth part 43, and the lower surface of the pressing table 42 to prevent indentation.

[0094] In this embodiment, when manually rotating one of the telescopic bolts 45, it can drive the sliding table 44 below to rise, thereby exposing the second avoidance groove 46. At this time, the light emitted by the infrared emitter 13 behind it can pass through the second avoidance groove 46. When the operator operates, the glued part 111 of the book is directly aligned with the light and placed on the cutting table 2. At this time, the protruding glue 112 of the book is aligned with the first gap 34, and the glued part 111 is aligned with the second avoidance groove 46 above. Thus, after the paper presser presses down, the second avoidance groove 46 can also avoid the glued part 111.

[0095] Preferably, side convex parts 431 are provided on both sides of the lower end of the second tooth part 43, and the two sides below the sliding table 44 are adapted to the side convex parts 431. Thus, when rotating the telescopic bolt 45, the side convex parts 431 can limit the excessive downward movement of the sliding table 44, so that the lower surface of the sliding table 44 remains flush with the lower surface of the second tooth part 43.

Claims

1. A high-precision cutting method for book printing paper, characterized in that, It includes the following steps: Step 1: Obtain the position where the book binding part (111) of the book should be placed on the cutting table (2) of the paper cutter according to the book size; Step 2: Adjust the horizontal position of the paper pressing device of the paper cutter through the position of the book on the cutting table (2) so that the paper pressing device avoids the book binding part (111); Step 3: Control the paper pressing device to move downward and press the book with the horizontal position of the paper pressing device in Step 2; Step 4: Control the cutting knife (10) of the paper cutter to cut the book obliquely downward starting from the side close to the book binding side (110); A gantry (1) is provided above the cutting table (2), and the cutting knife (10) is installed below the gantry (1); The paper cutter further includes a first tooth part (33), and the first tooth part (33) is located on the rear side of the upper surface of the cutting table (2) close to the book binding side (110), and there is a first gap (34) between two adjacent first tooth parts (33); The first tooth part (33) is used to block the book and limit the cutting size of the book, and the first gap (34) is used to avoid the protruding glue (112) at the end of the book binding side (110); The paper pressing device includes a pressing strip, and an avoidance groove is provided on the pressing strip, and the position of the avoidance groove is opposite to the position of the first gap (34) for avoiding the book binding part (111); The pressing strip is a rectangular pressing strip (5), and one avoidance groove one (51) is provided on each outer surface of the rectangular pressing strip (5), and the four avoidance grooves one (51) are evenly arranged in the length direction of half of the rectangular pressing strip (5), and one avoidance groove one (51) corresponds to one first gap (34), and the avoidance groove one (51) is used to avoid the book binding part (111); It further includes a turning motor (6), and the turning motor (6) is arranged on the gantry (1) and is used to drive the rectangular pressing strip (5) to rotate so that the avoidance grooves one (51) at different positions on the rectangular pressing strip (5) can all face the book binding part (111) downward; 2. The high-precision cutting method for book printing paper according to claim 1, characterized in that: The pressing strip includes two groups of rectangular pressing strips (5) arranged side by side up and down. Each rectangular pressing strip (5) has four outer surfaces, and one avoidance groove one (51) is provided on each outer surface of the rectangular pressing strip (5). The avoidance grooves one (51) on one rectangular pressing strip (5) are distributed on the first quarter section of this rectangular pressing strip (5), and the avoidance grooves one (51) on the other rectangular pressing strip (5) are distributed on the second quarter section of this rectangular pressing strip (5), and one avoidance groove one (51) corresponds to one first gap (34); First bearing seats (8) are provided at both ends of the two rectangular pressing strips (5), and a turning motor (6) for independently controlling the rotation of the two rectangular pressing strips (5) is arranged in the first bearing seats (8); A second bearing seat (9) is provided on the side of the first bearing seat (8) away from the rectangular pressing strip (5), and a revolution motor is arranged in the second bearing seat (9) for adjusting the relative positions of the two rectangular pressing strips (5); 3. A high-precision cutting method for book printing paper according to claim 1 or 2, characterized in that: An infrared emitter (13) is arranged in the first gap (34), and the infrared emitter (13) is used to emit infrared rays; The book binding part (111) obtained in the first step is located on the path of the infrared rays emitted by any one of the infrared ray emitters (13).

4. A high-precision cutting method for book printing paper according to claim 3, characterized in that: The cutting knife (10) is installed on the tool rest (11). Oblique slots (17) are formed on both sides of the tool rest (11). Fixed guide rods (18) are arranged in areas of the gantry (1) opposite to the oblique slots (17). A reciprocating assembly (14) for pushing and pulling the tool rest (11) is arranged on one side of the cutting table (2), so that the fixed guide rods (18) and the oblique slots (17) move relative to each other, forming a state where the cutting knife (10) performs an inclined cutting.

Images