Mechanism for eliminating splayed folds of rotary folding machine
By introducing a back slit roller, a timing pulley, and a cylinder-driven slitting knife into the rotary folding machine, the problem of figure-eight folds in thick paper during folding was solved, resulting in flat book pages and increased printing speed.
Patent Information
- Application Number
- CN202520606387.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-01
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-04-01
AI Technical Summary
During rotary printing, thick paper is difficult to fold due to the difficulty in expelling air, resulting in herringbone folding defects that affect printing speed and quality.
By introducing a back slit roller, a timing pulley, a coupling, and a cylinder-driven slitting knife into the rotary folding machine, the distance between the slitting knife and the back slit roller is controlled by the timing belt drive and the extension and retraction of the cylinder piston rod, thus cutting the air inside the book block to avoid the formation of figure-eight folds.
It effectively eliminates the problem of figure-eight folds, improves printing speed and quality, and ensures that the book pages are flat and wrinkle-free at the corners.
Smart Images
Figure CN223851908U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to the technical field of rotary printing machine, especially relates to an eight -letter fold mechanism of rotary folding machine is eliminated. BACKGROUND
[0002] At present, in the printing process of the existing rotary machine, when several papers with large thickness enter the folding machine together, eight-letter fold failure occurs at the folding angle because the air in the book block is not easy to be released when the air is compressed by the roller, and the printing failure of the folding angle at the 16 opening position occurs when the air release knife edge is too large, which limits the printing speed. The previous knife is driven, the air release knife is uniform, and the knife edge can fall at any position of the book back. When the knife edge does not fall at the intersection position, the printing failure of the eight-letter fold compression occurs. INVENTION CONTENTS
[0003] The utility model provides a kind of eight -letter fold mechanism of rotary folding machine is eliminated, solve above-mentioned problems.
[0004] The technical scheme of the utility model is realized as follows:
[0005] An eight -letter fold mechanism of rotary folding machine, including back slit roller, the end of the back slit roller is provided with synchronous pulley A, the upper portion of the synchronous pulley A is provided with synchronous pulley B, the synchronous pulley A is connected by synchronous belt between the synchronous pulley B, the synchronous pulley B is installed on synchronous belt support, the synchronous pulley B is drivingly connected with shaft coupling, the end of the shaft coupling away from the synchronous pulley B is installed with cutter power gear, the cutter power gear is engaged with knife power gear, the knife power gear is coaxially connected with slitting knife, and the slitting knife is located above the back slit roller;
[0006] The cutter power gear is installed on support B, the support B is located above the back slit roller, the support B is detachably connected with movable support by bolt, the upper end of the movable support is installed with air cylinder, and the piston rod end of the air cylinder is fixedly connected with the upper end of the movable support.
[0007] Through the above technical scheme, the rotation of back slit roller itself is utilized, power is transmitted to slitting knife by the cooperation of synchronous belt, synchronous pulley A, synchronous pulley B and shaft coupling, the slitting knife is driven to move up and down by the extension and retraction of air cylinder piston rod, so that the distance between slitting knife and back slit roller is flexibly controlled, the air in book block is released when back slit roller rotates and drives book block to move, and the failure of eight-letter fold at the folding angle of book block is avoided.
[0008] Optionally, the inside of the synchronous pulley B is internally provided with a hub, the inside of the hub is detachably connected with a shaft coupling through a locking screw and a shaft coupling locking shaft, the end of the hub is provided with a bearing, the inner ring of the bearing is fixedly connected with the end of the hub, the outer ring of the bearing is installed on the synchronous belt support, the synchronous belt support is installed on the support A, and the synchronous belt support and the support A are fixed.
[0009] Through the above technical scheme, the hub can transmit power to the universal shaft when the synchronous pulley B rotates, and the bearing, the synchronous belt support and the support A can ensure the stability of the universal shaft during rotation.
[0010] Optionally, the outside of the hub is provided with an elastic retainer, and the elastic retainer is located between the hub and the synchronous pulley B.
[0011] Through the above technical scheme, the elastic retainer can improve the tightness of the connection between the hub and the synchronous pulley B.
[0012] Optionally, the shaft coupling is a universal shaft coupling, the left end of the universal shaft coupling is detachably connected with the hub, the right end of the universal shaft coupling is provided with the shaft coupling power gear, and the height of the left end of the universal shaft coupling is lower than the height of the right end of the universal shaft coupling.
[0013] Optionally, the left end of the shaft coupling is provided with a shaft coupling sheath.
[0014] Optionally, the inside of the cutter power gear is provided with a rotating shaft, the rotating shaft is rotatably connected with the support B, the rotating shaft is provided with the slitting cutter, the shell of the air cylinder is installed on the support C, the support C is fixed, the support C is provided with a fixed shaft, the fixed shaft is arranged in parallel and spaced apart with the back slotted roller, a spring is installed between the support C and the movable support, one end of the spring is fixedly connected with the support C, and the other end of the spring is fixedly connected with the movable support.
[0015] Optionally, the outside of the slitting cutter is provided with a protective cover.
[0016] Optionally, the slitting cutter comprises a base disc, four head-tail blades are circumferentially and spaced apart installed on the base disc, the four head-tail blades are distributed in a cross shape, a plurality of fan-shaped blades are circumferentially and spaced apart installed on the base disc, and the plurality of fan-shaped blades are uniformly distributed between adjacent two head-tail blades.
[0017] Optionally, the base disc is provided with a plurality of strip-shaped holes, the strip-shaped holes correspond to the head-tail blades and the fan-shaped blades one by one, the head-tail blades are detachably connected with the strip-shaped holes through bolts and nuts, and the fan-shaped blades are detachably connected with the strip-shaped holes through bolts and nuts.
[0018] Through the technical scheme, the strip-shaped holes can flexibly adjust the phase positions of the head-tail blades and the fan-shaped blades, and realize the slitting purpose.
[0019] Optionally, the base disc is pressed on the rotating shaft through two pressing blocks, and the base disc is located between the two pressing blocks.
[0020] After the above technical scheme is adopted, the beneficial effects of the utility model are as follows:
[0021] The utility model discloses a back slit roller rotates, and a transmission chain is separated, and the power of rotation is transmitted to the slitting cutter, and the slitting cutter is adjusted in position through rotation and the pressing block, so that the position of the mitered corner eight-pleat is cut open by the slitting cutter, the air in the position is discharged, the book block can be flattened, and the folding fault of the finished book is avoided. The piston rod of the air cylinder can flexibly control the distance between the slitting cutter and the back slit roller, and flexibly control the slitting cutter to move downward to cut and discharge the air. BRIEF DESCRIPTION OF DRAWINGS
[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor under the premise of the drawings.
[0023] Figure 1 It is the main view of the mechanism for eliminating eight-pleat of the rotary folding machine in the embodiment;
[0024] Figure 2 It is the side view of the mechanism for eliminating eight-pleat of the rotary folding machine in the embodiment Figure I ;
[0025] Figure 3 It is the side view of the mechanism for eliminating eight-pleat of the rotary folding machine in the embodiment Figure II ;
[0026] Figure 4 It is the main view of the slitting cutter in the embodiment;
[0027] Figure 5 It is the partial sectional view of the cooperation between the rotating shaft and the pressing block in the embodiment;
[0028] Figure 6is a schematic diagram of a folding cutting position in the embodiment;
[0029] Figure 7 is a schematic diagram corresponding to a book opening in the embodiment.
[0030] Explanation of reference numerals: 1, back slitting roller; 2, synchronous pulley A; 3, synchronous belt; 4, support A; 5, locking screw; 6, elastic retainer ring; 7, synchronous pulley B; 8, wheel hub; 9, shaft locking coupling; 10, bearing; 11, coupling sheath; 12, universal coupling; 13, synchronous belt support; 14, slitting knife; 15, shroud; 16, fixed shaft; 17, coupling power gear; 18, knife power gear; 19, support B; 20, movable support; 21, spring; 22, air cylinder; 23, rotating shaft; 24, pressing block; 25, base disc; 26, head and tail blade; 27, sector blade; 28, support C. DETAILED DESCRIPTION
[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.
[0032] The embodiment of the present application discloses a mechanism for eliminating moccasin folds of a rotary folding machine.
[0033] EMBODIMENT
[0034] According to Figures 1 to 7 As shown in the figure, a mechanism for eliminating moccasin folds of a rotary folding machine includes a power unit and a slitting knife 14. The power unit includes a back slitting roller 1, a synchronous belt support 13, a synchronous pulley A 2, a synchronous pulley B 7, a synchronous belt 3, a wheel hub 8, a universal coupling 12, a coupling power gear 17, a fixed shaft 16, a knife power gear 18, a support A 4, a support B 19, a movable support 20, a fixed support, a spring 21, and an air cylinder 22.
[0035] The back slitting roller 1 is horizontally placed, and the end of the back slitting roller 1 is coaxially connected with a synchronous pulley A2, the upper side of the synchronous pulley A2 is provided with a synchronous pulley B7, the synchronous pulley A2 and the synchronous pulley B7 are connected through a synchronous belt 3, the inside of the synchronous pulley B7 is provided with a hub 8, the outside of the hub 8 is sleeved with an elastic retainer 6, the elastic retainer 6 is located between the hub 8 and the synchronous pulley B7, the inside of the hub 8 is detachably connected with a universal coupling 12 through a locking screw 5 and a shaft locking shaft 9, the end of the hub 8 is provided with a bearing 10, the inner ring of the bearing 10 is fixedly connected with the end of the hub 8, the outer ring of the bearing 10 is installed on a synchronous belt support 13, the synchronous belt support 13 is installed on a support A4, and the synchronous belt support 13 and the support A4 are fixed.
[0036] The left end of the universal coupling 12 is detachably connected with the hub 8, the right end of the universal coupling 12 is provided with a coupling power gear 17, the height of the left end of the universal coupling 12 is lower than the height of the right end of the universal coupling 12, the left end of the universal coupling 12 is sleeved with a coupling sheath 11, the coupling power gear 17 is engaged with a knife power gear 18, the inside of the knife power gear 18 is provided with a rotating shaft 23, the rotating shaft 23 is rotatably connected with a support B19, the rotating shaft 23 is provided with a slitting knife 14, the center of the slitting knife 14 is sleeved on the outside of the rotating shaft 23, the slitting knife 14 is located above the back slitting roller 1, when the knife power gear 18 rotates, the slitting knife 14 rotates synchronously through the rotating shaft 23, and the outside of the slitting knife 14 is sleeved with a shield 15.
[0037] The slitting knife 14 comprises a base disc 25, four head-tail blades 26 are annularly and spacedly arranged on the base disc 25, the four head-tail blades 26 are distributed in a cross shape, the angle between adjacent two head-tail blades 26 is 90°, a plurality of sector-shaped blades 27 are annularly and spacedly arranged on the base disc 25, the plurality of sector-shaped blades 27 are uniformly distributed between adjacent two head-tail blades 26, a plurality of strip-shaped holes are formed in the base disc 25, the strip-shaped holes correspond to the head-tail blades 26 and the sector-shaped blades 27 one by one, the head-tail blades 26 are detachably connected with the strip-shaped holes through bolts and nuts, the sector-shaped blades 27 are detachably connected with the strip-shaped holes through bolts and nuts, the phase positions of the head-tail blades 26 and the sector-shaped blades 27 are adjusted through the bolts and the nuts, and the slitting purpose is achieved. The base disc 25 is sleeved on the outside of the rotating shaft 23, the left side and the right side of the base disc 25 are respectively provided with pressing blocks 24, the pressing blocks 24 are sleeved on the outside of the rotating shaft 23, the pressing blocks 24 are used for clamping the base disc 25, the end of the rotating shaft is provided with a round nut, the round nut at the end of the rotating shaft 23 is loosened, the pressing blocks 24 loosen the base disc 25, the base disc 25 has a space for adjustment, so that the phase position of the slitting knife 14 is adjusted, when the slitting knife 14 is adjusted to a proper position, the round nut at the end of the rotating shaft 23 is tightened, so that the two pressing blocks 24 clamps and fixes the slitting knife 14 again.
[0038] The bracket B19 is located above the back slitting roller 1, and the bracket B19 is detachably connected with a movable bracket 20 through bolts. The upper end of the movable bracket 20 is provided with a pneumatic cylinder 22. The piston rod end of the pneumatic cylinder 22 is fixedly connected with the upper end of the movable bracket 20. The shell of the pneumatic cylinder 22 is installed on a bracket C28. The bracket C28 is fixed. The bracket C28 is provided with a fixed shaft 16. The fixed shaft 16 is arranged in parallel and spaced apart above and below the back slitting roller 1. The bracket C28 and the movable bracket 20 are provided with a spring 21. One end of the spring 21 is fixedly connected with the bracket C28. The other end of the spring 21 is fixedly connected with the movable bracket 20. The pneumatic cylinder 22 drives the movable bracket 20 to move up and down through the extension and retraction of the piston rod. The movable bracket 20 drives the distance between the cutting knife 14 and the back slitting roller 1 to move up and down, so that when the cutting knife 14 cuts the book block, the piston rod of the pneumatic cylinder 22 extends, the cutting knife 14 enters the back slitting roller 1, thereby cutting the book block outside the back slitting roller 1. After the cutting operation is completed, the piston rod of the pneumatic cylinder retracts, and the elasticity of the spring 21 disengages the cutting knife 14 from the back slitting roller 1.
[0039] Working principle:
[0040] The power for the rotation of the back slitting roller 1 comes from the inside of the gear box. The rotation of the back slitting roller 1 belongs to the prior art, which will not be described here. The book block is placed between the back slitting roller 1 and the cutting knife 14. The back slitting roller 1 plays a supporting and tensioning role during rotation, which facilitates the cutting of the book block by the cutting knife 14.
[0041] The back slitting roller 1 rotates to drive the synchronous pulley A2 to rotate. The synchronous pulley A2 drives the synchronous pulley B7 to rotate through the synchronous belt 3. The synchronous pulley B7 drives the wheel hub 8 to rotate. The wheel hub 8 drives the universal joint 12 to rotate. The universal joint 12 drives the coupling power gear 17 to rotate. The coupling power gear 17 drives the knife power gear 18 to rotate. The knife power gear 18 drives the cutting knife 14 to rotate. The cutting knife 14 cuts the position prone to eight-character folding on the surface of the back slitting roller 1 during rotation, releases the air therein, and allows the book block to be flattened, thereby avoiding the eight-character folding and folding failure of the book block at the corner.
[0042] As shown in Figure 6 The four head and tail blades 26 are adjusted to correspond to the four points in the folding and cutting position diagram, wherein cutting is the cutting position, DP is the 32-opening folding position, and TAB is the 8-opening folding position. The book block opening position diagram is the actual position of the 16-opening folded book block. When folding 16 openings, the blade marked DP is to be removed. When folding 32 openings through 16 openings, the blade of DP needs to be added.
[0043] The mechanism in the utility model can be applied to 16-opening folding paper, whether it is a book block in the form of glue binding or a book block in the form of saddle stitching, when printing saddle stitching, four fan-shaped blades 27 can be removed, only four head-tail blades 26 are reserved, so as to specially cut the cross head-tail place of the book block, and the eight-character pleat fault will not occur.
[0044] In the description of the utility model, it is understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only used for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model. In the description of the utility model, unless otherwise specified and limited, it is necessary to explain that the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be mechanical connection or electrical connection, or the communication between two elements, or direct connection, or indirect connection through an intermediate medium, and those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.
[0045] The above is only a preferred embodiment of the utility model, and is not used to limit the utility model, any modification, equivalent replacement, improvement and the like within the technical scheme of the utility model should be included in the protection scope of the utility model.
Claims
1. In a rotary folding machine, an apparatus for eliminating dog-ears, comprising: Back slit roller, end of which is provided with synchronous pulley A, upper portion of which is provided with synchronous pulley B, which is connected with synchronous pulley A through synchronous belt, synchronous pulley B is installed on synchronous belt support, synchronous pulley B is drivingly connected with shaft coupling, one end of shaft coupling away from synchronous pulley B is installed with shaft coupling power gear, which is engaged with knife power gear, which is coaxially connected with slitting knife, which is located above back slit roller; Knife power gear is installed on support B, which is located above back slit roller, support B is detachably connected with movable support through bolts, upper end of movable support is installed with air cylinder, piston rod end of air cylinder is fixedly connected with upper end of movable support.
2. A mechanism for eliminating dog-ears in a web-fed rotary folding machine according to claim 1, characterized in that: Inside of synchronous pulley B is installed with wheel hub, wheel hub is detachably connected with shaft coupling through locking screw and shaft coupling locking shaft, end of wheel hub is installed with bearing, inner ring of bearing is fixedly connected with end of wheel hub, outer ring of bearing is installed on synchronous belt support, synchronous belt support is installed on support A, synchronous belt support and support A are fixed.
3. A mechanism for eliminating dog-ears from a web of material in a rotary folding machine as defined in claim 2, wherein: Elastic retainer ring is sleeved on outer side of wheel hub, which is located between wheel hub and synchronous pulley B.
4. A mechanism for eliminating dog-ears from a web of material in a rotary folding machine as defined in claim 2, wherein: Shaft coupling is universal shaft coupling, left end of universal shaft coupling is detachably connected with wheel hub, right end of universal shaft coupling is installed with shaft coupling power gear, height of left end of universal shaft coupling is lower than height of right end of universal shaft coupling.
5. A mechanism for eliminating dog-ears from a web of material in a rotary folding machine as defined in claim 1, wherein: Shaft coupling sleeve is installed on left end of shaft coupling.
6. A mechanism for eliminating dog-ears from a web of material in a rotary folding machine as defined in claim 1, wherein: Inside of knife power gear is installed with rotating shaft, rotating shaft is rotatably connected with support B, rotating shaft is installed with slitting knife, shell of air cylinder is installed on support C, support C is fixed, support C is installed with fixed shaft, which is arranged in parallel and spaced apart with back slit roller, spring is installed between support C and movable support, one end of spring is fixedly connected with support C, other end of spring is fixedly connected with movable support.
7. A mechanism for eliminating dog-ears from a web of material in a rotary folding machine as defined in claim 1, wherein: Slitting knife is sleeved with cover.
8. A mechanism for eliminating dog-ears from a web of material in a rotary folding machine as defined in claim 6, wherein: Slitting knife comprises base disc, four head-tail blades are spaced apart and installed on base disc in ring direction, four head-tail blades are distributed in cross shape, several fan-shaped blades are spaced apart and installed on base disc in ring direction, several fan-shaped blades are uniformly distributed between adjacent two head-tail blades.
9. A mechanism for eliminating dog-ears from a web-fed rotary folding machine as defined in claim 8, characterized in that: Several strip-shaped holes are formed on base disc, strip-shaped holes correspond to head-tail blades and fan-shaped blades one by one, head-tail blades are detachably connected with strip-shaped holes through bolts and nuts, fan-shaped blades are detachably connected with strip-shaped holes through bolts and nuts.
10. A mechanism for eliminating dog-ears in a web-fed rotary folding machine according to claim 8, characterized in that: Base disc is pressed on rotating shaft through two pressing blocks, base disc is located between two pressing blocks.