A universal paper feeder unit for a paper feeder

Abstract

The utility model discloses a universal paper feeding unit of paper feeding machine, including wind box, conveying roller group, printing lower roll, two machine frame plates, two support mechanisms, two connecting pieces, lifting drive mechanism and conveying drive mechanism. This universal paper feeding unit positions this unit printing lower roll through wind box first recess, and the second recess is used as pre -compatible interface and promotes the accurate alignment of adjacent unit printing lower roll, and the demand of customized modification when production line expansion is reduced obviously, and the connecting piece one end rotatory connection this unit support mechanism, the other end joint adjacent unit, form modular structure, support barehanded increase and remove unit. The sliding fit of support mechanism and machine frame plate and lifting drive synchronous control make wind box, printing lower roll and conveying roller group into integral slippable unit, and when disassembling, the joint can be removed and translated, and the secondary adjustment process is greatly reduced, and integrated conveying drive mechanism closes single unit power transmission link, and when maintaining, is independent in production line transmission system operation, and effectively reduces the whole line shutdown risk.

Description

Technical Field

[0001] This utility model relates to the field of paper feeder technology, and in particular to a universal paper feeder unit. Background Technology

[0002] In the printing and packaging equipment industry, multi-color printing or high-speed paper feeding processes typically require multiple paper feeding units connected in series for continuous operation. Current paper feeding unit designs generally employ an independent structure: each unit is equipped with a separate printing roller, bellows, and conveyor roller assembly, fixed to the frame plate by welding or bolting. This structure results in the installation and positioning accuracy between units relying on manual adjustment, and different units require customized connectors to match the positional tolerances of the printing roller and bellows. Furthermore, the fit between units must be tight to meet the requirements of negative pressure paper adsorption. These issues lead to high costs for production line upgrades and expansions, long replacement response times, and difficulty in meeting the flexible production demands for rapid switching of printing processes.

[0003] It is evident that existing technologies still need improvement and enhancement. Utility Model Content

[0004] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a universal paper feeding unit for paper feeders, which aims to solve the technical problems of high production line upgrade and expansion costs and long replacement response cycles caused by the poor versatility of existing paper feeding units.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A universal paper feeder unit for a paper feeder, comprising:

[0007] The bellows has a first groove and a second groove respectively at the beginning and end of the paper conveying direction;

[0008] The conveyor roller assembly, integrated into the air box, is used to transport paper;

[0009] The lower printing roller has its end circumferential surface along the paper conveying direction embedded in the first groove, and its beginning circumferential surface along the paper conveying direction embedded in the second groove of another paper feeding unit, and the highest point of the circumferential surface of the lower printing roller is higher than the top surface of the bellows.

[0010] Two frame plates, which are respectively located on both sides of the air box along the paper conveying direction;

[0011] Two support mechanisms are slidably connected to the inner sides of the two frame plates, respectively;

[0012] Two connectors are fixedly connected to both sides of the air box along the paper conveying direction. One end of each connector is rotatably connected to the support mechanism, and the other end of each connector is detachably snapped into the support mechanism of another paper feeding unit.

[0013] The lifting drive mechanism is mounted on one of the frame plates and is used to drive the two support mechanisms to lift synchronously.

[0014] A conveying drive mechanism drives the printing roller and the conveying roller group to rotate synchronously.

[0015] In the general paper feeding unit of the aforementioned paper feeder, the two ends of the connector are respectively provided with a connecting hole and a snap-fit ​​groove. The connecting hole is rotatably sleeved on the support mechanism, and the snap-fit ​​groove is detachably snap-fitted on the support mechanism of another paper feeding unit. A screw hole is provided between the connecting hole and the snap-fit ​​groove, and the air box is screwed to the connector via a screw and the screw hole.

[0016] The general paper feeding unit of the paper feeder, wherein the support mechanism includes a support plate, the upper end of the support plate is provided with a first connecting shaft and a second connecting shaft, a first bearing is sleeved on the outer side of the first connecting shaft, a second bearing is sleeved on the outer side of the second connecting shaft, the connecting hole of the connector is sleeved on the outer side of the first bearing, and the snap-fit ​​groove of the connector can be detachably snapped on the outer side of the second bearing of another paper feeding unit.

[0017] The general paper feeding unit of the paper feeder, wherein the support mechanism further includes a connecting plate and a mounting plate, the two ends of the connecting plate being fixedly connected to the support plate and the mounting plate respectively, and the mounting plate being used to rotatably mount the end of the lower printing roller.

[0018] In the general paper feeding unit of the paper feeder, a slider is fixedly provided on the side of the support plate away from the air box, the slider is slidably connected to a slide rail, and the slide rail is fixedly installed on the frame plate.

[0019] The general paper feeding unit of the paper feeder, wherein the lifting drive mechanism includes a lifting motor, a transmission shaft and two cams, the lifting motor is mounted on one of the frame plates and drives the transmission shaft, the two cams are respectively fixedly sleeved on both ends of the transmission shaft, and the outer peripheral surfaces of the two cams respectively abut against the bottom of the two support plates.

[0020] In the general paper feeding unit of the aforementioned paper feeder, the top of the air box is provided with a plurality of clearance holes, which are used to expose the conveyor roller surface of the conveyor roller group to the top of the air box.

[0021] The general paper feeding unit of the aforementioned paper feeder, wherein the conveying drive mechanism includes a conveying motor, a synchronous belt and a plurality of synchronous pulleys, the conveying motor drives and connects one end of the lower printing roller, the other end of the lower printing roller is fixedly connected to one of the synchronous pulleys, the plurality of synchronous pulleys are fixedly connected to the conveying roller group, and the lower printing roller and the conveying roller group are connected to the plurality of synchronous pulleys through the synchronous belt.

[0022] The general-purpose paper feeding unit of the aforementioned paper feeder further includes a limiting post, a spring, and an adjusting bolt. The limiting post is fixedly connected to the inner side of the frame plate, and a receiving hole is provided on the outer side of the limiting post. One end of the spring is accommodated in the receiving hole, and the other end of the spring abuts against the air box. The adjusting bolt is coaxially arranged with the receiving hole, and one end of the adjusting bolt passes through the limiting post and extends into the bottom of the receiving hole. A shim is provided between the adjusting bolt and the spring. The adjusting bolt is used to adjust the height of the spring protruding from the receiving hole.

[0023] The general-purpose paper feeder unit of the aforementioned paper feeder further includes a locking mechanism, which includes a locking cylinder and a locking component. The locking cylinder is installed at the bottom of one end of the air box and located below the conveyor roller assembly. The locking cylinder is driven and connected to the locking component. The upper end of the locking component is provided with an arc-shaped groove, which is used to accommodate the conveyor roller surface of the conveyor roller assembly to lock the conveyor roller assembly and stop its rotation.

[0024] Beneficial effects:

[0025] This utility model provides a universal paper feeding unit for a paper feeder, including a bellows, a conveyor roller assembly, a printing roller, two frame plates, two support mechanisms, two connectors, a lifting drive mechanism, and a conveying drive mechanism. This universal paper feeding unit adopts a modular integrated design, fundamentally improving the equipment's versatility and assembly / disassembly efficiency. Its core lies in the collaborative innovation of the bellows and connectors: standardized grooves on both sides of the bellows position the printing roller of this unit via a first groove, while the second groove serves as a pre-compatible interface to adapt to the printing rollers of adjacent units, achieving airflow and mechanical matching when multiple units are connected in series, significantly reducing the customized modification requirements for expanding traditional production lines; one end of the connector is rotatably connected to the support mechanism of this unit, and the other end is locked to adjacent units via a detachable snap-fit ​​structure, forming a mechanical expansion module, simplifying the addition and removal of units and reducing reliance on auxiliary positioning tools. The optimized assembly and disassembly efficiency is based on the integrated design of dynamic components: the sliding connection between the support mechanism and the frame plate, combined with the synchronous control of the lifting drive mechanism, allows the air box, printing roller, and conveyor roller assembly to form a functional unit that can slide as a whole. During disassembly, the unit can be pulled out by releasing the latches and moving horizontally, reducing the frequency of secondary calibration of air pressure or transmission mechanisms. The conveyor drive mechanism integrates the power transmission of the printing roller and the conveyor roller assembly, making the maintenance of a single unit independent of the production line drive chain, reducing the risk of downtime for the entire line in traditional multi-level linkage systems. This design shortens the assembly and disassembly time of the unit and supports flexible expansion of production line specifications, effectively improving equipment reuse rate and production response speed. Attached Figure Description

[0026] Figure 1 A three-dimensional structural diagram of the universal paper feeding unit provided by this utility model;

[0027] Figure 2 A schematic diagram of the specific structure of the bellows provided by this utility model;

[0028] Figure 3 An exploded view of the general paper feeding unit provided by this utility model;

[0029] Figure 4 This is a schematic diagram of the main structure of the bellows provided by this utility model;

[0030] Figure 5 A partial structural schematic diagram of the bellows provided by this utility model;

[0031] Figure 6 A side view of the general paper feeding unit provided by this utility model;

[0032] Figure 7 A schematic diagram of the specific structure of the connector provided by this utility model;

[0033] Figure 8 An exploded view of the connector, support mechanism, and lifting drive mechanism provided by this utility model;

[0034] Figure 9 An exploded structural diagram of the sliding fit between the support mechanism and the frame plate provided by this utility model;

[0035] Figure 10 A partial structural schematic diagram of the locking mechanism provided by this utility model;

[0036] Figure 11 A schematic diagram of the splicing structure of two universal paper feeding units provided by this utility model.

[0037] Figure label:

[0038] 1—Blower air box; 2—Transfer roller assembly; 3—Printing lower roller

[0039] 4—Frame plate; 5—Support mechanism; 6—Connector

[0040] 7—Lifting drive mechanism; 8—Transmission drive mechanism; 9—Locking mechanism

[0041] 11—First groove; 12—Second groove; 13—Allowance hole

[0042] 14—Air distribution chamber; 15—Vacuum chamber; 16—Baffle plate

[0043] 17—Damper 18—Opening / closing cylinder 19—Switch / Switch component

[0044] 41—Slide rail 42—Limit pin 43—Spring

[0045] 44—Adjusting bolt; 45—Shim; 51—Support plate

[0046] 52—First connecting shaft; 53—Second connecting shaft; 54—First bearing

[0047] 55—Second bearing; 56—Connecting plate; 57—Mounting plate

[0048] 58—Slider; 61—Connecting hole; 62—Snap-fit ​​groove

[0049] 71—Lifting motor; 72—Drive shaft; 73—Cam

[0050] 81—Transmission motor; 82—Synchronous belt; 83—Synchronous pulley

[0051] 91—Locking cylinder; 92—Locking component. Detailed Implementation

[0052] This utility model provides a universal paper feeding unit for a paper feeder. To make the purpose, technical solution, and effects of this utility model clearer and more explicit, the following describes this utility model in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0053] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," and "right," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or a specific orientational structure and operation. Therefore, they should not be construed as limitations on this utility model. Furthermore, "first" and "second" are only for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0054] Please see Figures 1 to 11 As shown, this utility model provides a universal paper feeding unit for a paper feeder, comprising:

[0055] The bellows 1 has a first groove 11 and a second groove 12 respectively at the beginning and end of the paper conveying direction;

[0056] Conveyor roller assembly 2, integrated into air box 1, is used for conveying paper;

[0057] The lower printing roller 3 has its end circumferential surface along the paper conveying direction embedded in the first groove 11, and its beginning circumferential surface along the paper conveying direction embedded in the second groove 12 of another paper feeding unit. The highest point of the circumferential surface of the lower printing roller 3 is higher than the top surface of the bellows 1.

[0058] Two frame plates 4 are located on both sides of the air box 1 along the paper conveying direction;

[0059] Two support mechanisms 5 are slidably connected to the inner sides of two frame plates 4, respectively;

[0060] Two connectors 6 are fixedly connected to both sides of the air box 1 along the paper feeding direction. One end of each connector 6 is rotatably connected to the support mechanism 5, and the other end of each connector 6 is detachably snapped into the support mechanism 5 of another paper feeding unit.

[0061] The lifting drive mechanism 7 is installed on one of the frame plates 4 and is used to drive the two support mechanisms 5 to lift synchronously.

[0062] The conveying drive mechanism 8 drives the printing lower roller 3 and the conveying roller group 2 to rotate synchronously.

[0063] This universal paper feeding unit adopts a modular integrated design, fundamentally improving the equipment's versatility and assembly / disassembly efficiency. Its core lies in the collaborative innovation of the air box 1 and the connector 6: the standardized grooves on both sides of the air box 1 position the lower printing roller 3 of the unit via the first groove 11, while the second groove 12 serves as a pre-compatible interface to adapt to the lower printing roller 3 of adjacent units, achieving airflow and mechanical matching when multiple units are connected in series, significantly reducing the customized modification requirements for expanding traditional production lines; one end of the connector 6 is rotatably connected to the unit's support mechanism 5, and the other end is locked to adjacent units via a detachable snap-fit ​​structure, forming a mechanical expansion module, simplifying the addition and removal of units and reducing reliance on auxiliary positioning tools. The optimized assembly and disassembly efficiency is based on the integrated design of dynamic components: the sliding connection between the support mechanism 5 and the frame plate 4, combined with the synchronous control of the lifting drive mechanism 7, allows the air box 1, the lower printing roller 3, and the conveyor roller group 2 to form a functional unit that can slide as a whole. During disassembly, the unit can be pulled out by releasing the latches and moving horizontally, reducing the frequency of secondary calibration of air pressure or transmission mechanisms. The conveyor drive mechanism 8 integrates the power transmission of the lower printing roller 3 and the conveyor roller group 2, making the maintenance of a single unit independent of the production line drive chain, reducing the risk of downtime for the entire line in traditional multi-level linkage systems. This design shortens the assembly and disassembly time of the unit and supports flexible expansion of production line specifications, effectively improving equipment reuse rate and production response speed.

[0064] Please see Figures 2 to 5As shown, in this embodiment, the bellows 1 includes an air distribution chamber 14 and a vacuum chamber 15 arranged in upper and lower layers. The air distribution chamber 14 and the vacuum chamber 15 are connected. An external vacuum pump is connected to one side of the vacuum chamber via a pipeline. The air distribution chamber 14 is divided into multiple air chambers by multiple partitions 16. The multiple air chambers are arranged along the length of the bellows 1, that is, perpendicular to the direction of paper conveying. A vent is provided in the middle of the partition 16 to connect two adjacent air chambers. An openable and closable air door 17 is hinged to the bottom side of the vent. With the middle of the length of the bellows 1 as the boundary, the air door 17 on the left opens to the left and the air door 17 on the right opens to the right. Each air door 17 is driven to open or close by an independent opening and closing cylinder 18 and a switch 19. Vacuum chamber 15 is only connected to the air chamber in the middle. During vacuuming, airflow enters the air chamber from the top and groove of bellows 1. The airflow in the air chambers on both sides converges into the middle air chamber through the dampers, then enters vacuum chamber 15, and finally enters the external vacuuming equipment through the pipeline. When actually feeding paper, the opening and closing cylinder 18 can be controlled to open the damper 17 according to the width of the paper being fed, thereby controlling the negative pressure width of bellows 1. If the width of the paper is less than the left and right length of bellows 1 but greater than the width of the middle air chamber, only the damper 17 near the middle is opened, and the dampers 17 of the air chambers on both sides that are not covered by paper are closed, which can save energy consumption of the vacuuming equipment. If the width of the paper is equal to the left and right length of bellows 1, all dampers 17 are opened to make the adsorption force on the paper uniform and stable. The multiple baffles 16 of the air box 1 have arc-shaped concave surfaces at both ends to form a first groove 11 and a second groove 12. Both the first groove 11 and the second groove 12 are located in and connected to the air distribution chamber 14. This ensures that when the circumferential surface of the printing roller 3 is embedded in the first groove 11 of this unit and the second groove 12 of the adjacent unit, there are gaps between the printing roller 3 and the first groove 11 and the second groove 12, allowing the printing roller 3 to also be in a negative pressure environment. The connection gap between the two air boxes 1 also has an adsorption force. Placing the printing roller 3 at the edge of the air box 1 facilitates cleaning and maintenance of the printing roller 3.

[0065] Please see Figures 1 to 3 , Figure 10 As shown, the conveyor roller group 2 includes several conveyor rollers 21 and several roller shafts 22. Each roller shaft 22 is uniformly fitted with several coaxial conveyor roller bodies 21. The conveyor roller surface of the conveyor roller body 21 protrudes from the top of the air box 1 to contact the conveyed paper. The several roller shafts are axially parallel and uniformly arranged in the width direction of the air box 1, i.e., the paper conveying direction. The two ends of the roller shafts are rotatably mounted on the two end side plates in the length direction of the air box 1 via bearings. Each roller shaft rotatably passes through the multiple partitions via multiple bearings. The several conveyor roller bodies on two adjacent roller shafts are staggered, thereby increasing the contact area between the conveyor roller group 2 and the paper in the paper width direction, improving the conveying stability and adaptability to the width of the conveyed paper.

[0066] Please see Figures 3 to 4 As shown, the two ends of the printing lower roller 3 are rotatably mounted on the support mechanism 5 via bearings. The highest point of the circumference of the printing lower roller 3 is level with the highest point of the conveyor roller surface of the conveyor roller group 2 and is higher than the top surface of the bellows 1, so that the printing lower roller 3 can contact the paper and print the pattern on the paper.

[0067] In this embodiment, the conveying drive mechanism 8 can be a conventional synchronous transmission structure such as gear transmission or belt transmission. The conveying drive mechanism 8 synchronously drives the printing roller 3 and the conveying roller group 2 to rotate, so that the paper printing and conveying speeds are consistent, ensuring that the printed pattern is error-free. Using the same conveying drive mechanism 8 for synchronous driving can eliminate the need to adjust the speed of the printing roller 3 and the conveying roller group 2 to be consistent, making it convenient to use.

[0068] Please see Figure 3 , Figure 6 As shown, the conveying drive mechanism 8 includes a conveying motor 81, a synchronous belt 82, and several synchronous pulleys 83. The conveying motor 81 drives one end of the lower printing roller 3, and the other end of the lower printing roller 3 is fixedly connected to one of the synchronous pulleys 83. The several synchronous pulleys 83 are fixedly connected to the conveying roller group 2. The lower printing roller 3 and the conveying roller group 2 are connected to the several synchronous pulleys 83 via the synchronous belt 82. In this embodiment, the conveying motor 81 is driven to one end of the lower printing roller 3 via a coupling, and the other end of the lower printing roller 3 and the conveying roller group 2 are connected to the synchronous belt 82 via the synchronous pulleys 83. The synchronous belt 82 and the synchronous pulleys 83 are located in the space between the support plate 51 and the mounting plate 57.

[0069] Please see Figure 1 As shown, one of the two frame plates 4, which is closer to the external vacuum equipment, is provided with a through hole for the vacuum pipeline to pass through. The through hole corresponds to the vacuum chamber of the air box 1. The two frame plates 4 are connected and fixed by the support mechanism 5 and the air box 1, so that they can stand stably on the ground of the production workshop during the application process to support the entire paper feeding unit.

[0070] Please see Figures 1 to 3 , Figure 6 As shown, in this embodiment, two support mechanisms 5 are symmetrically arranged at both ends of the length direction of the air box 1, and two frame plates 4 are also symmetrically arranged at both ends of the length direction of the air box 1. When adjusting the height of the printing lower roller 3, the two support mechanisms 5 slide and rise synchronously relative to the two frame plates 4 to ensure the balance of the printing lower roller 3, the air box 1, and the conveying roller group 2 in the paper width direction, and to prevent the paper from tilting to one side during the paper conveying process.

[0071] Please see Figures 1 to 3As shown, in this embodiment, two connectors 6 are symmetrically arranged at both ends of the length of the air box 1. The middle part of the connector 6 is fixedly connected to the partition plate between the vacuum chamber and the air distribution chamber of the air box 1 by screws, and the connector 6 can rotate relative to the other paper feeding unit at the engagement point. Since both ends of the connector 6 can rotate, when the printing roller 3 of the machine unit rises or falls, the end of the connector 6 that is sleeved is driven to rise or fall by the support mechanism 5. Conversely, the end of the connector 6 that is engaged falls or rises, thereby causing the air box 1 to tilt downward or upward along the paper feeding direction, so as to facilitate a smooth transition at the connection point of the two paper feeding units and prevent steps from being generated due to height differences, which would affect the paper feeding.

[0072] Please see Figure 2 and Figure 6 As shown, in this embodiment, there is one lifting drive mechanism 7. One lifting drive mechanism 7 drives two support mechanisms 5 to lift synchronously to ensure the balance of the printing roller 3, the air box 1, and the conveying roller group 2 in the paper width direction, prevent the paper from tilting to one side during the paper conveying process, and save the manufacturing cost of the paper feeding unit.

[0073] Please see Figure 3 , Figures 7 to 8 , Figure 11 As shown, the connector 6 has a connecting hole 61 and a snap-fit ​​groove 62 at both ends. The connecting hole 61 is rotatably fitted onto the support mechanism 5, and the snap-fit ​​groove 62 is detachably snap-fitted onto the support mechanism 5 of another paper feeding unit. A screw hole is provided between the connecting hole 61 and the snap-fit ​​groove 62. The air box 1 is screwed to the connector 6 via the screw hole. In this embodiment, the snap-fit ​​groove 62 of the connector 6 is a semi-circular groove. The groove opening width of the snap-fit ​​groove 62 is smaller than the groove width at the center of the groove, so that a snap-fit ​​protrusion is formed at the groove opening to lock the second bearing 55. The two sides of the groove wall of the semi-circular groove extend outward with guide surfaces, and the distance between the two guide surfaces gradually increases from the snap-fit ​​groove 62 outward. The connector 6 is fixedly connected to the partition plate between the vacuum chamber and the air distribution chamber of the air box 1 by screws.

[0074] Please see Figure 3 and Figure 7As shown, the support mechanism 5 includes a support plate 51. A first connecting shaft 52 and a second connecting shaft 53 are provided on the upper end of the support plate 51. A first bearing 54 is sleeved on the outer side of the first connecting shaft 52, and a second bearing 55 is sleeved on the outer side of the second connecting shaft 53. The connecting hole 61 of the connector 6 is sleeved outside the first bearing 54, and the snap-fit ​​groove 62 of the connector 6 is detachably snap-fitted to the outer side of the second bearing 55 of another paper feeding unit. In this embodiment, the support plate 51 has a split structure, including an upper plate and a lower plate, each with a semi-circular groove. The upper and lower plates are fixedly connected by screws, causing the two semi-circular grooves to merge and form a circular hole. One end of the first connecting shaft 52 is installed in the circular hole. The first bearing 54 is sleeved on the end of the first connecting shaft 52 that protrudes outside the support plate 51. The connecting hole 61 of the connector 6 is interference-fitted with the first bearing 54. The first connecting shaft 52 is a hollow shaft with its axis aligned with the axis of the printing lower roller 3 to avoid interference with the end shaft of the printing lower roller 3. Interference; the diameter of the second connecting shaft 53 is smaller than the diameter of the first connecting shaft 52. The second connecting shaft 53 is fixedly installed on the upper end of the lower plate of the support plate 51 by bolts. The second bearing 55 is limited on the second connecting shaft 53 by the shoulder of the second connecting shaft 53. The groove width of the snap-fit ​​groove 62 of the connector 6 is equal to the outer diameter of the second bearing 55 to hold the second bearing 55 tightly. A guide surface is set to guide the second bearing 55, so that when the two paper feeding units are spliced, the connector 6 can snap onto the second bearing 55 of the other paper feeding unit.

[0075] Please see Figure 3 and Figure 7 As shown, the support mechanism 5 also includes a connecting plate 56 and a mounting plate 57. The two ends of the connecting plate 56 are respectively fixedly connected to the support plate 51 and the mounting plate 57. The mounting plate 57 is used to rotatably mount the end of the lower printing roller 3. In this embodiment, one end of the support plate 51 and the connecting plate 56, and the other end of the mounting plate 57 and the connecting plate 56, are limited by a mortise and tenon structure and then fixedly connected by bolts. The mounting plate 57 also includes an upper plate and a lower plate with semi-circular grooves. The upper and lower plates are fixedly connected by bolts so that the two semi-circular grooves merge to form a mounting hole. The two ends of the lower printing roller 3 are mounted in the mounting hole via bearings. The connecting plate 56 connects the support plate 51 and the mounting plate 57, creating a space between the mounting plate 57 and the support plate 51 for mounting a pulley drive mechanism.

[0076] Please see Figure 9As shown, a slider 58 is fixedly mounted on the side of the support plate 51 away from the air box 1 by screws. The slider 58 is slidably connected to a slide rail 41, which is fixedly mounted to the frame plate 4 by screws. In this embodiment, a groove is provided on the side of the support plate 51 away from the air box 1 to accommodate the slider 58. The length of the groove is greater than the length of the slide rail 41. The groove accommodates the slide rail 41 and the slider 58, which shortens the distance between the support plate 51 and the frame plate 4, making the unit structure more compact. It also protects the sliding structure of the slide rail 41 and the slider 58, preventing dust and debris from accumulating inside and affecting the sliding and lifting activities. A pad is provided at the bottom of the support plate 51, and the pad is fixed to the bottom end of the lower plate by bolts.

[0077] Please see Figure 2 and Figure 6 As shown, the lifting drive mechanism 7 includes a lifting motor 71, a drive shaft 72, and two cams 73. The lifting motor 71 is mounted on one of the frame plates 4 and drives the drive shaft 72. The two cams 73 are respectively fixedly sleeved on both ends of the drive shaft 72, and the outer peripheral surfaces of the two cams 73 respectively abut against the bottom of the two support plates 51. In this embodiment, the lifting motor 71 drives the drive shaft 72 through a coupling. The two ends of the drive shaft 72 are rotatably connected to the two frame plates 4 through bearings. The cams 73 are fixedly sleeved on the outside of the drive shaft 72 by limit pins. The cams 73 are eccentric wheels. The outer peripheral surfaces of the cams 73 abut against the pads of the support plates 51 to avoid mutual wear between the cams 73 and the support plates 51, which would affect the accuracy. Replacing the support plates 51 is relatively troublesome, but replacing the pads after they wear out is relatively convenient.

[0078] Please see Figures 1 to 3 As shown, the top of the bellows 1 is provided with a plurality of clearance holes 13, which allow the conveyor roller surfaces of the conveyor roller assembly 2 to be exposed on the top of the bellows 1. In this embodiment, the height of the conveyor roller surface is greater than the top height of the bellows 1, and the conveyor roller surface does not contact the hole wall of the clearance hole 13 to avoid affecting the rotation of the conveyor roller assembly 2, and a gap is left to allow air to enter the bellows 1 to form a negative pressure environment.

[0079] Please see Figures 8 to 9As shown, the system also includes a limiting post 42, a spring 43, and an adjusting bolt 44. The limiting post 42 is fixedly connected to the inner side of the frame plate 4 by bolts. A receiving hole is provided on the outer side of the limiting post 42. One end of the spring 43 is accommodated in the receiving hole, and the other end of the spring 43 abuts against the air box 1. The adjusting bolt 44 is coaxially arranged with the receiving hole. One end of the adjusting bolt 44 passes through the limiting post 42 and extends into the bottom of the receiving hole. A shim 45 is provided between the adjusting bolt 44 and the spring 43. The adjusting bolt 44 is used to adjust the height of the spring 43 protruding from the receiving hole. By turning the adjusting bolt 44, the shim 45 can be raised or lowered within the receiving hole, thereby adjusting the length of the spring 43 protruding from the receiving hole to adapt to the actual application's support height requirements for the spring 43.

[0080] When the blower unit is disassembled, the blower box 1 presses against the spring 43, causing the spring 43 to elastically deform and contract. When it is spliced ​​again, as the guide surface of the connector 6 guides the second bearing 55 of another paper feeder unit into the snap-fit ​​groove 62, the connector 6 will drive the blower box 1 slightly upward. At this time, the elastic force of the spring 43 restoring its elastic deformation and elongation will generate an upward thrust on the blower box 1, reducing the pressure of the guide surface above the connector 6 on the second bearing 55, thereby reducing the friction between the connector 6 and the second bearing 55 and reducing wear.

[0081] Please see Figure 10 As shown, it also includes a locking mechanism 9, which includes a locking cylinder 91 and a locking member 92. The cylinder 91 is installed at the bottom of one end of the air box 1 and is located below the conveyor roller group 2. The cylinder 91 drives and connects to the locking member 92. The upper end of the locking member 92 is provided with an arc-shaped groove. The arc-shaped groove is used to accommodate the conveyor roller surface of the conveyor roller group 2 to lock the conveyor roller group 2 and stop it from rotating. In this embodiment, the locking mechanism 9 is located at one end of the length of the air box 1. The cylinder 91 is fixedly installed on the partition plate between the vacuum chamber and the air distribution chamber of the air box 1 by bolts, and is located at the end of the partition plate to avoid the vacuum chamber. The telescopic rod of the cylinder 91 passes through the partition plate and enters the air distribution chamber. The locking member 92 is fixedly connected to the telescopic rod of the cylinder 91. A limit rod is provided on one side of the locking member 92. The end of the limit rod abuts against the side plate of the air box 1 to prevent the locking member 92 from rotating around the axis of the telescopic rod of the cylinder 91, thereby affecting the locking accuracy of the locking member 92 on the conveyor roller group 2.

[0082] In summary, this utility model uses the first groove 11 of the bellows 1 to position the printing roller 3 of the machine unit, and the second groove 12 as a pre-compatible interface to achieve precise alignment of the printing roller 3 of adjacent units, eliminating the need for customized modifications when expanding the production line; the connector 6 has a modular structure that connects to the machine support mechanism 5 at one end and snaps onto the adjacent unit at the other end, supporting manual operation to add or remove the unit. The sliding cooperation and synchronous control of the lifting drive between the support mechanism 5 and the frame plate 4 make the bellows 1, the printing roller 3 and the conveyor roller group 2 an integral sliding functional unit. During disassembly, it can be moved and pulled away simply by releasing the snap, eliminating the need for secondary adjustment; the integrated conveyor drive mechanism 8 closes the power transmission link of a single unit, and is completely independent of the production line transmission system during maintenance, avoiding downtime of the entire line.

[0083] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this utility model, and all such substitutions or changes should fall within the protection scope of the appended claims of this utility model.

Claims

1. A universal paper feeding unit for a paper feeder, characterized in that, include: The bellows (1) has a first groove (11) and a second groove (12) respectively at the beginning and end of the paper conveying direction; The conveyor roller assembly (2) is integrated into the bellows (1) and is used to convey paper; The printing roller (3) is embedded in the first groove (11) at its end circumferential surface along the paper conveying direction, and in the second groove (12) of another paper feeding unit at its beginning circumferential surface along the paper conveying direction. The highest point of the circumferential surface of the printing roller (3) is higher than the top surface of the bellows (1). Two frame plates (4) are located on both sides of the air box (1) along the paper conveying direction. Two support mechanisms (5) are slidably connected to the inner sides of two frame plates (4); Two connectors (6) are fixedly connected to the two sides of the air box (1) along the paper feeding direction. One end of the connector (6) is rotatably connected to the support mechanism (5), and the other end of the connector (6) is detachably snapped into the support mechanism (5) of another paper feeding unit. The lifting drive mechanism (7) is installed on one of the frame plates (4) and is used to drive the two support mechanisms (5) to lift synchronously. The transmission drive mechanism (8) drives the printing lower roller (3) and the transmission roller group (2) to rotate synchronously.

2. The universal paper feeding unit of the paper feeder according to claim 1, characterized in that, The connector (6) has a connecting hole (61) and a snap-fit ​​groove (62) at both ends. The connecting hole (61) is rotatably sleeved on the support mechanism (5), and the snap-fit ​​groove (62) is detachably snapped on the support mechanism (5) of another paper feeding unit. A screw hole is provided between the connecting hole (61) and the snap-fit ​​groove (62). The air box (1) is screwed to the connector (6) via screws and the screw hole.

3. The universal paper feeding unit of the paper feeder according to claim 2, characterized in that, The support mechanism (5) includes a support plate (51). The upper end of the support plate (51) is provided with a first connecting shaft (52) and a second connecting shaft (53). A first bearing (54) is sleeved on the outer side of the first connecting shaft (52), and a second bearing (55) is sleeved on the outer side of the second connecting shaft (53). The connecting hole (61) of the connector (6) is sleeved on the outside of the first bearing (54), and the snap-fit ​​groove (62) of the connector (6) can be detachably snapped on the outside of the second bearing (55) of another paper feeding unit.

4. The universal paper feeding unit of the paper feeder according to claim 3, characterized in that, The support mechanism (5) further includes a connecting plate (56) and a mounting plate (57). The two ends of the connecting plate (56) are fixedly connected to the support plate (51) and the mounting plate (57) respectively. The mounting plate (57) is used to rotatably mount the end of the printing roller (3).

5. The universal paper feeding unit of the paper feeder according to claim 4, characterized in that, A slider (58) is fixedly provided on the side of the support plate (51) away from the bellows (1). The slider (58) is slidably connected to a slide rail (41), and the slide rail (41) is fixedly installed on the frame plate (4).

6. The universal paper feeding unit of the paper feeder according to claim 5, characterized in that, The lifting drive mechanism (7) includes a lifting motor (71), a transmission shaft (72) and two cams (73). The lifting motor (71) is mounted on one of the frame plates (4) and drives the transmission shaft (72). The two cams (73) are respectively fixedly sleeved on both ends of the transmission shaft (72), and the outer peripheral surfaces of the two cams (73) respectively abut against the bottom of the two support plates (51).

7. The universal paper feeding unit of the paper feeder according to claim 1, characterized in that, The top of the bellows (1) is provided with a plurality of clearance holes (13), which are used to expose the conveyor roller surface of the conveyor roller group (2) to the top of the bellows (1).

8. The universal paper feeding unit of the paper feeder according to claim 1, characterized in that, The conveying drive mechanism (8) includes a conveying motor (81), a synchronous belt (82), and a plurality of synchronous pulleys (83). The conveying motor (81) drives one end of the printing roller (3), and the other end of the printing roller (3) is fixedly connected to one of the synchronous pulleys (83). The plurality of synchronous pulleys (83) are fixedly connected to the conveying roller group (2). The printing roller (3) and the conveying roller group (2) are connected by transmission through the synchronous belt (82) and the plurality of synchronous pulleys (83).

9. The universal paper feeding unit of the paper feeder according to claim 1, characterized in that, It also includes a limiting post (42), a spring (43), and an adjusting bolt (44). The limiting post (42) is fixedly connected to the inner side of the frame plate (4). A receiving hole is provided on the outer side of the limiting post (42). One end of the spring (43) is housed in the receiving hole, and the other end of the spring (43) abuts against the bellows (1). The adjusting bolt (44) is coaxially arranged with the receiving hole. One end of the adjusting bolt (44) passes through the limiting post (42) and extends into the bottom of the receiving hole. A washer (45) is provided between the adjusting bolt (44) and the spring (43). The adjusting bolt (44) is used to adjust the height of the spring (43) protruding from the receiving hole.

10. The universal paper feeding unit of the paper feeder according to claim 1, characterized in that, It also includes a locking mechanism (9), which includes a locking cylinder (91) and a locking member (92). The locking cylinder (91) is installed at the bottom of one end of the air box (1) and located below the conveyor roller group (2). The locking cylinder (91) drives the locking member (92). The upper end of the locking member (92) is provided with an arc-shaped groove. The arc-shaped groove is used to accommodate the conveyor roller surface of the conveyor roller group (2) to lock the conveyor roller group (2) to stop rotation.

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