Positioning and printing mechanism for sanitary napkins

Abstract

The invention relates to the technical field of computer printing, and discloses a sanitary towel positioning printing mechanism which comprises a paper feeding frame, conveying modules and a computer digital printer, the conveying modules are installed on the two sides of the outer wall of the paper feeding frame, and the computer digital printer is fixedly connected to the upper surface of the outer wall of the paper feeding frame. A tensioning assembly is arranged in the paper feeding frame, the tensioning assembly comprises a driving groove, the driving groove is formed in the paper feeding frame, and a worm is rotationally connected to the interior of the positioning block; the servo motor drives the two-way threaded rod to ascend, the rectangular limiting set and the roller are driven to accurately adjust the height, flexible tightening is formed on raw materials, for example, on a high-speed production line, the roller can be attached to the surfaces of the raw materials in real time, it is guaranteed that the raw materials are stably conveyed along a straight line all the time, follow-up printing position deviation and product quality defects caused by deviation are avoided, and the production efficiency is improved. And meanwhile, when the roller tightens the raw materials, the raw materials can be flatly unfolded, so that the computer digital printer always faces a flat printing surface.

Description

Technical Field

[0001] The present invention relates to the field of printing, and more particularly to a positioning and printing mechanism for sanitary napkins. Background Art

[0002] A positioning and printing mechanism for sanitary napkins is a device used to accurately position and print sanitary napkins during the production process. It usually applies computer-controlled computer digital printers to achieve high-precision printing operations.

[0003] When the traditional paper feeding rack conveys the paper inner packaging of sanitary napkins for printing, it usually conveys the printing area in the form of a roll of paper. When conveying the roll of paper of the inner packaging of sanitary napkins, the roll of paper often shifts, skews, or even wrinkles during the conveying process due to the lack of effective limiting. At the same time, the long strip-shaped raw materials are prone to stacking due to speed fluctuations and uneven tension, resulting in blurred printing and missing content of the computer digital printer. At the same time, the limiting structures of traditional conveying devices mostly use simple slide rails or brackets. Under long-term high-speed operation, they are prone to looseness and displacement due to vibration, affecting the conveying effect, and frequent maintenance increases the maintenance cost and downtime.

[0004] Existing paper feeding racks mostly use fixed baffles, which can only correct the offset in a fixed direction. When the offset angle of the raw material is slightly large, the fixed structure cannot effectively cope with it, easily resulting in edge wear or wrinkles. At the same time, the fixed straightening structure usually uses rigid materials to directly contact the coil material, which is prone to scratching and puncturing the surface of the material under high-speed friction. Moreover, the fixed structure can only correct at a single position once, and cannot solve the secondary offset generated during long-distance conveying.

[0005] Therefore, it is necessary to provide a positioning and printing mechanism for sanitary napkins to solve the above problems. Summary of the Invention

[0006] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a positioning and printing mechanism for sanitary napkins.

[0007] To achieve the above purpose, the present invention provides the following technical solution: A positioning and printing mechanism for sanitary napkins, including a paper feeding rack, a conveying module, and a computer digital printer. The conveying module is installed on both outer walls of the paper feeding rack, and the computer digital printer is fixedly connected to the upper surface of the outer wall of the paper feeding rack. A tensioning component is arranged inside the paper feeding rack;

[0008] The tensioning component includes a driving groove, which is opened inside the paper feeding rack. Two positioning blocks are fixedly connected in a vertical row on the driving groove. A worm is rotatably connected inside the positioning block. Two turbines are symmetrically rotatably connected inside the driving groove. Two U-shaped tooth slider blocks are symmetrically slidably connected to the bottom of the driving groove.

[0009] Preferably, the tensioning assembly further includes a servo motor, which is installed on the top of the drive groove, and the top of the worm is fixedly connected to the output shaft of the servo motor.

[0010] Preferably, the tensioning assembly further includes two bidirectional threaded rods, which are respectively rotatably connected inside the two U-shaped tooth sliders. A gear ring is fixedly connected to the outer wall of each bidirectional threaded rod. Rectangular grooves are symmetrically formed inside the paper feeding frame, and a toothed plate is fixedly connected to the inside of each of the two rectangular grooves.

[0011] Preferably, a reset assembly is arranged below the computer digital printer. The reset assembly includes two limiting grooves, which are symmetrically formed on the paper feeding frame. Two limiting sliders are slidably connected inside each limiting groove. The ends of every two limiting sliders away from the limiting groove are jointly fixedly connected to a rectangular limiting group, and the rectangular limiting group is composed of two columnar rods and two connecting plates. A roller is symmetrically rotatably connected to the outside of each group of rectangular limiting groups. A moving ring is symmetrically slidably connected to the outer wall of each group of rectangular limiting groups, and the moving ring is slidably connected to the connecting plate of the rectangular limiting group.

[0012] Preferably, the reset assembly further includes four positioning plates. Every two positioning plates form a group, and each group of positioning plates is fixedly connected to the top of the moving ring. An inclined plate is rotatably connected to the adjacent side of each group of positioning plates. A reset spring is arranged between each inclined plate and the positioning plate, and both ends of each reset spring are fixedly connected to the inclined plate and the positioning plate.

[0013] Preferably, a feeding assembly is arranged on the conveying module. The feeding assembly includes a rotating rod, which is installed on the conveying module. Electric cylinders are symmetrically installed on the outer wall of the rotating rod. A rectangular block is fixedly connected to the output shaft of the electric cylinder. A coil spring is sleeved on the outer wall of the rotating rod. A feeding cylinder is sleeved on the outside of the coil spring, and one end of the coil spring is fixedly connected to the rotating rod, and the other end of the coil spring is fixedly connected to the inner wall of the feeding cylinder. Limiting blocks are symmetrically fixedly connected to the outer wall of the feeding cylinder.

[0014] Preferably, both of the two turbines are meshed with the worm, and the two U-shaped tooth sliders are respectively meshed with the two turbines.

[0015] Preferably, the threads at both ends of the bidirectional threaded rod are arranged in opposite directions, and the gear ring is meshed with the toothed plate.

[0016] Preferably, both of the toothed plates are composed of a rectangular frame and three racks. Two of the racks are fixed on the inner surface of the rectangular frame, and the other rack is fixed on the inner surface of the rectangular frame away from the other two racks. The two racks are not connected to each other, and there is a certain gap between the two racks. The gap between the two racks is equal to the length of the other rack.

[0017] Preferably, each of the bidirectional threaded rods is rotatably connected inside the rectangular limiting group, and a threaded groove is provided inside each of the moving rings. Each of the moving rings is threadedly connected to the bidirectional threaded rod.

[0018] A sanitary napkin positioning and printing mechanism provided by the present invention, compared with the prior art, the beneficial effects of the present invention are:

[0019] By driving the bidirectional threaded rod to rise through the servo motor, the rectangular limiting group and the roller are driven to accurately adjust the height, forming a flexible tightening on the inner packaging roll paper of the sanitary napkin. For example, on a high-speed production line, even if the conveying speed of the raw material of the inner packaging roll paper of the sanitary napkin reaches dozens of meters per minute, the roller can always fit the surface of the inner packaging roll paper of the sanitary napkin in real time, ensuring that it is always stably conveyed along a straight line, avoiding subsequent printing position deviation and product quality defects caused by the deviation of the inner packaging paper of the sanitary napkin released from the roll paper. At the same time, when the roller tightens the inner packaging roll paper of the sanitary napkin, it can flatten and unfold it, so that the computer digital printer always faces a flat printing surface.

[0020] The rectangular limiting group of the device is matched with the limiting slider and the limiting groove, and has strong stability during rising and working. Cooperating with components such as a return spring, it can effectively buffer the vibration and impact during operation, reduce the wear degree of components, extend the service life of the equipment, and reduce the maintenance frequency and maintenance cost.

[0021] Through the setting of the gear ring and the toothed plate, the inclined plate realizes reciprocating motion. During the conveying process of the inner packaging roll paper of the sanitary napkin, the inclined plate can apply corrective forces from both sides reciprocally at the same time, adjust the offsets in different directions, and realize self-adaptive straightening. The setting of the spring can absorb part of the impact force and avoid material damage.

[0022] Through the setting of the gear ring, the two inclined plates realize reciprocating motion on both sides of the roller. During the conveying process of the inner packaging roll paper of the sanitary napkin, continuous cyclic correction can be carried out to ensure no offset throughout the process, achieving the effects of dynamic balance of tension, straight path constraint, and active correction of offset, fundamentally eliminating problems such as slack, offset, and wrinkles of the material during the printing process, thereby avoiding printing defects such as ghosting and pattern misalignment.

[0023] By utilizing the power of the servo motor to drive the worm, the rectangular limiting group and the roller are simultaneously lifted to tighten the inner packaging roll paper of the sanitary napkin, and the gear ring drives the reciprocating straightening of the moving ring, avoiding the installation of an additional power source, reducing the volume of the equipment, and achieving the purpose of tightening and straightening support at the same time. Brief Description of the Drawings

[0024] Figure 1 Schematic diagram of the positional relationship of the overall device in the present invention;

[0025] Figure 2 Cross-sectional view of the overall device in the present invention;

[0026] Figure 3 Schematic diagram of the positional relationship of the drive groove, worm, and turbine in the present invention;

[0027] Figure 4 Schematic diagram of the positional relationship of the U-shaped tooth slider, bidirectional threaded rod, and gear ring in the present invention;

[0028] Figure 5 Schematic diagram of the positional relationship of the paper feeding frame, drive groove, and limit groove in the present invention;

[0029] Figure 6 In the present invention Figure 5 Enlarged view of the structure at A;

[0030] Figure 7 Schematic diagram of the positional relationship of the paper feeding frame, limit groove, and limit slider in the present invention;

[0031] Figure 8 In the present invention Figure 7 Enlarged view of the structure at B;

[0032] Figure 9 Schematic diagram of the positional relationship of the paper feeding frame, bidirectional threaded rod, and gear ring in the present invention;

[0033] Figure 10 In the present invention Figure 9 Enlarged view of the structure at C;

[0034] Figure 11 Schematic diagram of the positional relationship of the limit slider, rectangular limiting group, and roller in the present invention;

[0035] Figure 12 In the present invention Figure 11 Enlarged view of the structure at D;

[0036] Figure 13 Schematic diagram of the positional relationship of the rectangular limiting group, moving ring, positioning plate, and inclined plate in the present invention;

[0037] Figure 14 Schematic diagram of the positional relationship of the rotating rod, electric cylinder, rectangular block, and limiting block in the present invention;

[0038] Figure 15 This is a schematic diagram of the positional relationship among the rotating rod, the coil spring, and the unwinding cylinder in the present invention.

[0039] Reference numerals: 11, paper feeding frame; 12, conveying module; 13, computer digital printer;

[0040] The tensioning assembly includes: 21, driving groove; 22, servo motor; 23, positioning block; 24, worm; 25, turbine; 26, U-shaped tooth slider; 27, bidirectional threaded rod; 28, gear ring; 29, rectangular groove; 210, tooth plate;

[0041] The reset assembly includes: 31, limiting groove; 32, limiting slider; 33, rectangular limiting group; 34, roller; 35, moving ring; 36, positioning plate; 37, inclined plate; 38, reset spring;

[0042] The unwinding assembly includes: 41, rotating rod; 42, electric cylinder; 43, rectangular block; 44, coil spring; 45, unwinding cylinder; 46, limiting block. Detailed implementation manners

[0043] In order to make the objectives, technical solutions, and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0044] In the description of the present invention, the orientation or positional relationship indicated by the terms "center", "transverse", "upper", "lower", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, 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 of the present invention.

[0045] The following describes the specific implementation of the present invention in detail with reference to specific embodiments.

[0046] The embodiment is as Figures 1 to 10 shown. A sanitary napkin positioning and printing mechanism provided by an embodiment of the present invention includes a paper feeding frame 11, a conveying module 12, and a computer digital printer 13. The conveying module 12 is installed on both sides of the outer wall of the paper feeding frame 11, and the computer digital printer 13 is fixedly connected to the upper surface of the outer wall of the paper feeding frame 11. A tensioning assembly is provided inside the paper feeding frame 11, and the conveying module 12 is composed of a plurality of conveying rollers, belts, driving motors, etc. This is the prior art and will not be elaborated here;

[0047] The tensioning assembly includes a driving groove 21, which is opened inside the paper feed rack 11. Two positioning blocks 23 are fixedly connected to the driving groove 21 in a vertical row. A worm 24 is rotatably connected inside the positioning block 23. A turbine 25 is symmetrically rotatably connected inside the driving groove 21. Both turbines 25 are meshed with the worm 24. The rotation of the worm 24 causes the turbines 25 on both sides to rotate in opposite directions. A U-shaped toothed slider 26 is symmetrically slidably connected to the bottom of the driving groove 21, and the two U-shaped toothed sliders 26 are arranged with the lower parts inclined inward and the upper parts inclined outward. The two U-shaped toothed sliders 26 are respectively meshed with the two turbines 25, so that the U-shaped toothed slider 26 can move the turbine 25.

[0048] The tensioning assembly further includes a servo motor 22 , which is mounted on the top of the driving slot 21 , and the top of the worm 24 is fixedly connected to the output shaft of the servo motor 22 .

[0049] The tensioning assembly also includes two bidirectional threaded rods 27, which are rotatably connected to the inside of the two U-shaped toothed sliders 26 respectively, and the outer wall of each bidirectional threaded rod 27 is fixedly connected to a gear ring 28. Rectangular grooves 29 are symmetrically opened inside the paper feed rack 11, and the rectangular grooves 29 are connected to the driving groove 21. The insides of the two rectangular grooves 29 are fixedly connected to toothed plates 210. The two toothed plates 210 are composed of a rectangular frame and three racks, and two of the racks are fixed on the inner surface of the rectangular frame, and the other rack is fixed on the inner surface of the rectangular frame away from the other two racks. The two racks are not connected to each other, and there is a certain gap between the two racks. At the same time, the gap between the two racks is equal to the length of the other rack. The gear ring 28 is meshed with the toothed plate 210, so that the toothed plate 210 can drive the bidirectional threaded rod 27 to rotate through the gear ring 28.

[0050] like Figures 11 to 13 As shown, a reset component is arranged below the computer digital printer 13, and the reset component includes two limit grooves 31, and the two limit grooves 31 are symmetrically opened on the paper feed rack 11, and the interior of each limit groove 31 is slidably connected to two limit sliders 32, and one end of each two limit sliders 32 away from the limit groove 31 is fixedly connected to a rectangular limit group 33, and the rectangular limit group 33 is composed of two columnar rods and two connecting plates, and the outer side of each rectangular limit group 33 is symmetrically rotatably connected to a roller 34, and the outer wall of each rectangular limit group 33 is symmetrically slidably connected to a moving ring 35, and the moving ring 35 is slidably connected to the connecting plate of the rectangular limit group 33, and each bidirectional threaded rod 27 is rotatably connected to the interior of the rectangular limit group 33, and a thread groove is arranged inside each moving ring 35, and each moving ring 35 is threadedly connected to the bidirectional threaded rod 27, and the threads at both ends of the bidirectional threaded rod 27 are arranged in opposite directions, so that the bidirectional threaded rod 27 can drive the two outer moving rings 35 to move in opposite directions.

[0051] The reset assembly further includes four positioning plates 36. Every two positioning plates 36 form a group. Each group of positioning plates 36 is fixedly connected to the top of the moving ring 35. And on the adjacent sides of each group of positioning plates 36, an inclined plate 37 is rotatably connected. A reset spring 38 is arranged between each inclined plate 37 and the positioning plate 36. And both ends of each reset spring 38 are fixedly connected to the inclined plate 37 and the positioning plate 36. And the reset spring 38 is located at one end far from the hinge point of the inclined plate 37 and the positioning plate 36.

[0052] As Figures 14 to 15 shown, a feeding assembly is arranged on the conveying module 12. The feeding assembly includes a rotating rod 41. The rotating rod 41 is installed on the conveying module 12. And a ratchet structure is arranged inside the conveying roller of the conveying module 12 to prevent the conveying module 12 from affecting the normal feeding and winding steps of the sanitary napkin inner packaging roll paper after power failure. Electric cylinders 42 are symmetrically installed on the outer wall of the rotating rod 41. A rectangular block 43 is fixedly connected to the output shaft of the electric cylinder 42. A coil spring 44 is sleeved on the outer wall of the rotating rod 41. A feeding cylinder 45 is sleeved on the outside of the coil spring 44. And one end of the coil spring 44 is fixedly connected to the rotating rod 41. The other end of the coil spring 44 is fixedly connected to the inner wall of the feeding cylinder 45. And the feeding cylinder 45 is rotatably connected to the rotating rod 41. Limiting blocks 46 are symmetrically and fixedly connected to the outer wall of the feeding cylinder 45. And the gap between each limiting block 46 is slightly larger than the width of the rectangular block 43 to facilitate the rectangular block 43 to limit the rotation of the feeding cylinder 45 through the limiting block 46.

[0053] Combined with the above embodiments, the following is the entire working process and working principle of the above embodiments:

[0054] Working principle: In the initial state, both U-shaped tooth slider 26 are located at the bottom of the driving groove 21. The gear ring 28 is not engaged with the tooth plate 210. The roller 34, the rectangular limiting group 33 and the conveying module 12 are at the same horizontal height. The reset spring 38 is not compressed.

[0055] During operation, during the production of sanitary napkins, the inner packaging of sanitary napkins is conveyed in the form of a roll of paper to uniformly print patterns, logos, codes, etc. Here, it is necessary to convey the inner packaging roll paper of sanitary napkins through the conveying module 12 on the paper feeding rack 11. First, the staff needs to sleeved the inner packaging roll paper of sanitary napkins on the outside of the feeding cylinder 45.

[0056] Subsequently, the release end of the inner packaging roll paper of the sanitary napkin passes through the conveying module 12 in sequence, and finally is wound on the side of the conveying module 12 away from the unwinding cylinder 45. Secondly, when the inner packaging roll paper of the sanitary napkin passes through the conveying module 12, the inner packaging roll paper of the sanitary napkin needs to be placed on the top of the roller 34. Subsequently, the conveying module 12 drives the rotating rod 41 to rotate. The rotating rod 41 can trigger the rectangular block 43 to snap into the limiting block 46 through the electric cylinder 42. Subsequently, during the rotation of the rotating rod 41, the electric cylinder 42, the rectangular block 43 and the limiting block 46 drive the unwinding cylinder 45 to rotate, and finally the unwinding cylinder 45 drives the outer inner packaging roll paper of the sanitary napkin to be gradually released;

[0057] At this time, it is necessary to print on the inner packaging roll paper of the sanitary napkin. Subsequently, the visual sensor on the computer digital printer 13 senses the area to be printed, and synchronously stops the operation of the conveying module 12, and the electric cylinder 42 also retracts synchronously. At this time, the output end of the electric cylinder 42 contracts, and the electric cylinder 42 drives the rectangular block 43 to move away from the unwinding cylinder 45, so that the rectangular block 43 gradually moves away from the limiting block 46. At this time, the limiting block 46 on the outer wall of the unwinding cylinder 45 loses the restriction of the rectangular block 43;

[0058] Subsequently, the staff starts the servo motor 22. The servo motor 22 will first drive the worm 24 fixedly connected to its output shaft to rotate. Since both turbos 25 are meshed with the worm 24, the worm 24 then drives the two turbos 25 to rotate in opposite directions. Subsequently, the two turbos 25 will respectively drive the two U-shaped tooth slider 26 to move, so that the two U-shaped tooth slider 26 both gradually rise along the inside of the drive groove 21;

[0059] During the rising process of the two U-shaped tooth slider 26, they will both drive the internal bidirectional threaded rod 27 to rise synchronously, so that the bidirectional threaded rod 27 drives the outer rectangular limit group 33 to rise synchronously. Subsequently, the rectangular limit group 33 drives the two limit sliders 32 to slide along the inside of the limit groove 31, thereby ensuring the stability of the rectangular limit group 33 when rising, so that the rectangular limit group 33 and the bidirectional threaded rod 27 both move in the same direction;

[0060] During the rising process of the rectangular limit group 33, it will drive the roller 34 to rise synchronously. Furthermore, during the process of the conveying module 12 conveying the released part of the inner packaging roll paper of the sanitary napkin, the roller 34 gradually drives the inner packaging roll paper of the sanitary napkin on the top to rise. Furthermore, the rectangular limit group 33 will gradually tighten the inner packaging roll paper of the sanitary napkin through the roller 34. When the conveying module 12 conveys the inner packaging roll paper of the sanitary napkin, the inner packaging roll paper of the sanitary napkin will drive the roller 34 to rotate along the outside of the rectangular limit group 33, so that the stability of the conveying module 12 conveying the inner packaging roll paper of the sanitary napkin is further improved.

[0061] When the drum 34 drives the sanitary napkin inner packaging roll paper at the top to rise, since a ratchet structure is provided inside the conveying roller of the conveying module 12, the conveying module 12 is in a locked state at this time. Further, the rotating rod 41 on the conveying module 12 cannot rotate. At this time, the drum 34 will pull the unwinding cylinder 45 outside the rotating rod 41 to rotate through the sanitary napkin inner packaging roll paper. During the above movement process, at this time, the limiting block 46 on the outer wall of the unwinding cylinder 45 loses the restriction of the rectangular block 43. Further, when the unwinding cylinder 45 rotates along the rotating rod 41, the coil spring 44 will be tightened synchronously, so that when the drum 34 drives the sanitary napkin inner packaging roll paper at the top to rise, the conveying module 12 can still continue to release some of the outer sanitary napkin inner packaging roll paper even when powered off;

[0062] Secondly, after the rectangular limiting group 33 tightens the sanitary napkin inner packaging roll paper through the drum 34, the printing effect of the computer digital printer 13 can be ensured, avoiding wrinkles during the conveying process of the sanitary napkin inner packaging roll paper by the conveying module 12, and also avoiding wrinkles when the sanitary napkin inner packaging roll paper is wound into a roll paper during production, resulting in incomplete patterns during printing, and also solving the situation that the released part of the sanitary napkin inner packaging roll paper is loose and not tight, affecting the printing effect.

[0063] By driving the bidirectional threaded rod 27 to rise through the servo motor 22, the rectangular limiting group 33 and the drum 34 are driven to accurately adjust the height, forming a flexible tightening of the raw material, ensuring that it is always stably conveyed along a straight line, avoiding subsequent printing position deviation and product quality defects caused by offset. At the same time, when the drum 34 tightens the raw material, it can flatten and unfold it, so that the computer digital printer 13 always faces a flat printing surface;

[0064] During the rising process of the two bidirectional threaded rods 27, the gear ring 28 will be driven to mesh with the tooth plate 210, and then the gear ring 28 will drive the bidirectional threaded rod 27 to rotate;

[0065] Since two of the racks of the tooth plate 210 are fixed on the inner surface of the rectangular frame, and the other rack is fixed on the inner surface of the rectangular frame far from the other two racks, and the two racks are not connected to each other, and there is a certain gap between the two racks, and the gap between the two racks is equal to the length of the other rack. During the meshing process of the gear ring 28 and the tooth plate 210, the gear ring 28 will mesh with the three racks respectively, causing the gear ring 28 to rotate counterclockwise first, then clockwise, and finally counterclockwise again;

[0066] During the counterclockwise rotation of the gear ring 28, the bidirectional threaded rod 27 will be driven to rotate counterclockwise synchronously. During the counterclockwise rotation of the bidirectional threaded rod 27, the two outer moving rings 35 will move horizontally towards the adjacent side. At the same time, the two moving rings 35 slide on the outer wall of the rectangular limiting group 33. And at this time, due to the setting of the rectangular limiting group 33, the stability of the horizontal movement of the two moving rings 35 is ensured;

[0067] During the counterclockwise rotation of the bidirectional threaded rod 27, the two moving rings 35 will be driven to move horizontally towards the adjacent side, causing the two moving rings 35 to move towards the direction of the roller 34. If the inner packaging roll paper of the sanitary napkin is offset above the roller 34 at this time, it will lead to a reduction in the conveying efficiency. In severe cases, the inner packaging roll paper of the sanitary napkin will be entangled with each other. Then, when the two moving rings 35 move towards the direction of the roller 34, the two moving rings 35 will drive the positioning plates 36 and the inclined plates 37 at the top to move towards the direction of the roller 34. Thus, the two inclined plates 37 will push the offset inner packaging roll paper of the sanitary napkin from both sides to gradually return to the top of the roller 34, achieving the purpose of straightening;

[0068] At the same time, due to the setting of the return spring 38, the inclined plate 37 will play a certain buffering effect during the process of resisting the return of the inner packaging roll paper of the sanitary napkin, reducing the vibration and impact during operation, absorbing part of the impact force, and avoiding material damage;

[0069] During the process of the U-shaped tooth slider 26 continuing to drive the bidirectional threaded rod 27 to rise, the gear ring 28 will engage with the three racks respectively. The gear ring 28 will rotate counterclockwise first and then clockwise, and finally rotate counterclockwise during the movement process;

[0070] At this time, when the gear ring 28 engages with the tooth plate 210, after rotating counterclockwise, the gear ring 28 will rotate clockwise. At this time, the gear ring 28 will drive the bidirectional threaded rod 27 to rotate clockwise synchronously. Contrary to the above movement process, when the bidirectional threaded rod 27 rotates clockwise, the bidirectional threaded rod 27 drives the two moving rings 35 to move away from the direction of the roller 34, causing the moving rings 35 to drive the positioning plates 36 and the inclined plates 37 at the top to move away from the direction of the roller 34;

[0071] Finally, after rotating clockwise, the gear ring 28 rotates counterclockwise. Finally, the gear ring 28 drives the two moving rings 35 to move towards the direction of the roller 34 again through the bidirectional threaded rod 27, causing the moving rings 35 to drive the positioning plates 36 and the inclined plates 37 at the top to move towards the direction of the roller 34, so that the inclined plate 37 again pushes the offset inner packaging roll paper of the sanitary napkin to gradually return to the top of the roller 34, achieving the purpose of straightening;

[0072] At the same time, while tightening the sanitary napkin inner packaging roll paper through the rectangular limit group 33 and the roller 34, the power to drive the bidirectional threaded rod 27 to rise by the U-shaped tooth slider 26 is achieved. The bidirectional threaded rod 27 reciprocally drives the two moving rings 35 to also reciprocally move horizontally through the gear ring 28, so that the positioning plates 36 and the inclined plates 37 at the tops of the two moving rings 35 intermittently and continuously straighten the sanitary napkin inner packaging roll paper at the top of the roller 34, solving the problem that the fixed installation limit member in the prior art causes the sanitary napkin inner packaging roll paper to be damaged by friction and extrusion after offset.

[0073] During the reciprocating movement of the inclined plate 37, during the conveying process of the coil material, the inclined plate 37 can reciprocally apply a correcting force from both sides at the same time to adjust the offset in different directions and achieve adaptive straightening.

[0074] Finally, when the servo motor 22 rotates in the reverse direction, the servo motor 22 drives the two U-shaped tooth sliders 26 to descend through the worm 24 and the turbine 25, so that the two U-shaped tooth sliders 26 both drive the bidirectional threaded rod 27 to gradually descend along the inside of the drive groove 21. Subsequently, the bidirectional threaded rod 27 drives the positioning plate 36 and the inclined plate 37 at the top of the moving ring 35 to correct the sanitary napkin inner packaging roll paper on the roller 34 again through the power of the gear ring 28 meshing with the tooth plate 210, and finally achieves the purpose of resetting.

[0075] During the reset process of the roller 34, the coil spring 44 will elastically stretch and drive the feeding cylinder 45 to rotate in the reverse direction, thereby collecting the sanitary napkin inner packaging roll paper during the reset process of the roller 34. After the elastic potential energy of the coil spring 44 is released, the staff drives the conveying module 12 to transport the sanitary napkin inner packaging roll paper again. After the conveying module 12 is started, the electric cylinder 42 will be energized synchronously, so that the rectangular block 43 at the output end of the electric cylinder 42 is clamped between the limiting blocks 46 again, and then the rotation of the feeding cylinder 45 is restricted through the electric cylinder 42 and the rectangular block 43, so that the conveying module 12 normally conveys the sanitary napkin inner packaging roll paper;

[0076] The situation of ghosting during the printing process of the computer digital printer 13 is avoided, and the effects of dynamic tension balance, path straight-line constraint, and offset active correction are achieved. The problems of slack, offset, and wrinkle of the material during the printing process are fundamentally eliminated, thereby avoiding printing defects such as ghosting and pattern misalignment.

[0077] Through the setting of the gear ring 28, the reciprocating movement of the two inclined plates 37 on both sides of the drum 34 is realized. During the conveying process of the coil material, cyclic correction can be continuously carried out to ensure no deviation throughout the process. At the same time, by utilizing the power of the servo motor 22 to drive the worm 24, the rectangular limit group 33 and the drum 34 are simultaneously lifted to tighten the inner packaging roll paper of the sanitary napkin, and the gear ring 28 drives the reciprocating straightening of the moving ring 35, avoiding the installation of an additional power source, reducing the volume of the equipment, and achieving the purpose of tightening and straightening at the same time.

[0078] For those skilled in the art, although several embodiments and examples of the present invention are described, these embodiments and examples are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in various other ways, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their variations are included in the scope and gist of the invention and are included in the invention described in the claims and its equivalent scope.

[0079] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sanitary napkin positioning and printing mechanism, comprising a paper feeding rack (11), a conveying module (12), and a computer digital printer (13). The conveying module (12) is installed on both sides of the outer wall of the paper feeding rack (11), and the computer digital printer (13) is fixedly connected to the upper surface of the outer wall of the paper feeding rack (11), characterized in that, Inside the paper feed frame (11), a tensioning component is provided; The tensioning component includes a driving groove (21) which is opened inside the paper feed frame (11). Two positioning blocks (23) are fixedly connected in a vertical row on the driving groove (21). A worm (24) is rotatably connected inside the positioning block (23). Two turbines (25) are symmetrically rotatably connected inside the driving groove (21). Two U-shaped tooth sliders (26) are symmetrically slidably connected to the bottom of the driving groove (21).

2. The positioning and printing mechanism for sanitary napkins according to claim 1, characterized in that, The tensioning component further includes a servo motor (22) which is installed on the top of the driving groove (21), and the top of the worm (24) is fixedly connected to the output shaft of the servo motor (22).

3. A sanitary napkin positioning and printing mechanism according to claim 1, characterized in that, The tensioning component further includes two bidirectional threaded rods (27). The two bidirectional threaded rods (27) are respectively rotatably connected inside the two U-shaped tooth sliders (26). A gear ring (28) is fixedly connected to the outer wall of each bidirectional threaded rod (27). Rectangular grooves (29) are symmetrically opened inside the paper feed frame (11). Tooth plates (210) are fixedly connected inside the two rectangular grooves (29).

4. A sanitary napkin positioning and printing mechanism according to claim 3, characterized in that, Below the computer digital printer (13), a reset component is provided. The reset component includes two limiting grooves (31) which are symmetrically opened on the paper feed frame (11). Two limiting sliders (32) are slidably connected inside each limiting groove (31). The ends of every two limiting sliders (32) away from the limiting groove (31) are jointly fixedly connected to a rectangular limiting group (33). The rectangular limiting group 33 is composed of two columnar rods and two connecting plates. A roller (34) is symmetrically rotatably connected to the outside of each rectangular limiting group (33). A moving ring (35) is symmetrically slidably connected to the outer wall of each rectangular limiting group (33), and the moving ring 35 is slidably connected to the connecting plate of the rectangular limiting group 33.

5. A sanitary napkin positioning and printing mechanism according to claim 4, characterized in that, The reset component further includes four positioning plates (36). Every two positioning plates (36) form a group. Each group of positioning plates (36) is fixedly connected to the top of the moving ring (35). An inclined plate (37) is rotatably connected to the adjacent side of each group of positioning plates (36). A reset spring (38) is arranged between each inclined plate (37) and the positioning plate (36), and both ends of each reset spring (38) are fixedly connected to the inclined plate (37) and the positioning plate (36).

6. The positioning and printing mechanism for sanitary napkins according to claim 1, characterized in that, A feeding component is arranged on the conveying module (12). The feeding component includes a rotating rod (41). The rotating rod (41) is installed on the conveying module (12). Electric cylinders (42) are symmetrically installed on the outer wall of the rotating rod (41). A rectangular block (43) is fixedly connected to the output shaft of the electric cylinder (42). A torsion spring (44) is sleeved on the outer wall of the rotating rod (41). A feeding cylinder (45) is sleeved on the outside of the torsion spring (44). One end of the torsion spring (44) is fixedly connected to the rotating rod (41), and the other end of the torsion spring (44) is fixedly connected to the inner wall of the feeding cylinder (45). Limiting blocks (46) are symmetrically and fixedly connected to the outer wall of the feeding cylinder (45).

7. A sanitary napkin positioning and printing mechanism according to claim 1, characterized in that, Both of the two turbines (25) are meshed with the worm (24). The two U-shaped tooth slider (26) are respectively meshed with the two turbines (25).

8. The positioning and printing mechanism for sanitary napkins according to claim 3, wherein, The threads at both ends of the bidirectional threaded rod (27) are arranged in opposite directions. The gear ring (28) is meshed with the tooth plate (210).

9. The positioning and printing mechanism for sanitary napkins according to claim 3, characterized in that, Both of the two tooth plates (210) are composed of a rectangular frame and three racks. Two of the racks are fixed on the inner surface of the rectangular frame, and the other rack is fixed on the inner surface of the rectangular frame away from the other two racks. The two racks are not connected to each other, and there is a certain gap between the two racks. At the same time, the gap between the two racks is equal to the length of the other rack.

10. A sanitary napkin positioning and printing mechanism according to claim 4, characterized in that, Each bidirectional threaded rod (27) is rotatably connected inside the rectangular limiting group (33). A threaded groove is arranged inside each moving ring (35). Each moving ring (35) is threadedly connected to the bidirectional threaded rod (27).

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