End delivery unit of a paper feeder

Abstract

The utility model discloses a kind of end paper feeder unit of paper feeder, including wind box, conveying roller group, printing lower roll, rack plate, supporting mechanism, lifting drive mechanism and conveying drive mechanism, wind box is provided with sealing plate, supporting mechanism is provided with the clamping shaft for detachable clamping and connecting one general paper feeder unit.The end paper feeder unit is combined through end sealing design, detachable clamping structure and integrated drive system, so that the sealing plate of wind box end directly closes negative pressure cavity, eliminates paper adsorption instability caused by air leakage;Meanwhile, the clamping shaft of supporting mechanism and general unit interface are inserted and pulled by hand, and form quick disassembly mechanism;By lifting drive mechanism linkage supporting mechanism overall lifting sliding, drive printing lower roll dynamic adjustment printing pressure, and conveying drive mechanism synchronously controls printing lower roll and conveying roller group to form closed-loop power transmission. Overall, the core target of end station adsorption reliable, disassembly convenient, operation accurate is realized.

Description

Technical Field

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

[0002] In negative pressure adsorption paper feeders, the universal paper feeder unit uses negative pressure generated by a bellows to adsorb and transport paper. The universal unit is typically designed with an open connection structure to accommodate continuous workstations. However, when at the end of the production line, its open structure prevents the negative pressure environment from being sealed, causing airflow leakage that affects adsorption stability and making the paper prone to shifting due to airflow turbulence. Furthermore, the connection between the end unit and the universal unit often relies on bolts, requiring disassembly of each connector, resulting in low maintenance efficiency.

[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 an end paper feeding unit for a paper feeder, which aims to solve the technical problems that the general paper feeding units in the prior art are not suitable for the end of the paper feeder and that it is inconvenient to disassemble and install between units.

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

[0006] An end-feed unit for a paper feeder, comprising:

[0007] The bellows has a groove at the beginning of the paper conveying direction and a sealing plate at the end of the paper conveying direction. The sealing plate is used to seal the negative pressure environment when used as the end of the paper feeder to adapt to the end position.

[0008] The conveyor roller assembly is integrated and installed in the air box, with the conveying surface higher than the top surface of the air box;

[0009] Two support mechanisms are symmetrically arranged at both ends of the bellows along its length. Each support mechanism includes a snap-fit ​​shaft, which is used to detachably snap-fit ​​with the previous general-purpose paper feeder unit to achieve quick connection and disconnection between paper feeder units.

[0010] The lower printing roller has two ends that are rotatably mounted on two support mechanisms, and the circumferential surface of the lower printing roller is adapted to the groove.

[0011] Two frame plates are symmetrically arranged at both ends of the length of the bellows, and two support mechanisms are slidably connected to the two frame plates respectively;

[0012] The lifting drive mechanism drives and connects two support mechanisms, enabling the two support mechanisms to lift and move synchronously.

[0013] The conveyor drive mechanism drives the lower printing roller and the conveyor roller assembly to rotate synchronously.

[0014] The end paper feeder unit of the paper feeder includes a wind box comprising a vacuum chamber and a distribution chamber, which are separated by a layered plate. The layered plate has a first through hole to connect the vacuum chamber and the distribution chamber. One end of the vacuum chamber has a second through hole to connect to an external vacuuming device. A third through hole is provided on a frame plate near the second through hole. The third through hole corresponds to the second through hole and is used to allow a vacuuming pipeline to pass through and connect to the second through hole. A groove is provided on the edge of the distribution chamber.

[0015] The end feeder unit of the paper feeder has a plurality of clearance holes arrayed on the top surface of the air box, which are used to allow the conveying surface of the conveying roller group to protrude from the top surface of the air box.

[0016] The end feeder unit of the paper feeder includes a distribution chamber with multiple partition plates spaced along its length. The partition plates divide the distribution chamber into multiple air chambers. Each partition plate has a vent hole to connect the multiple air chambers. An openable and closable damper is hinged to the lower side of the vent hole. The damper is connected to a switch. The switch is driven by an opening and closing cylinder. The opening and closing cylinder is fixedly installed on the outside of the vacuum chamber.

[0017] The end feeder unit of the paper feeder includes a support mechanism comprising a support plate, a connecting plate, and a mounting plate. The support plate is slidably connected to the frame plate. The two ends of the connecting plate are respectively fixedly connected to the support plate and the mounting plate. The mounting plate is used to rotatably install the lower printing roller. The layered plate of the air box is fixedly connected to the upper end of the support plate.

[0018] In the end paper feeder unit of the paper feeder, a slider is fixedly installed on the side of the support plate near the frame plate, the slider is slidably connected to a slide rail, and the slide rail is fixedly installed on the frame plate.

[0019] The end paper feeder unit of the paper feeder includes a conveyor roller group comprising multiple axially parallel rollers. The two ends of the multiple rollers are rotatably mounted on two end plates along the length of the air box. Multiple roller bodies are spaced apart on each roller. The multiple roller bodies on two adjacent rollers are staggered. The roller surfaces of the multiple roller bodies protrude from the top surface of the air box through multiple clearance holes.

[0020] The end paper feeder unit of the paper feeder includes a lifting drive mechanism comprising a lifting motor, a drive shaft and two cams. The lifting motor is mounted on one of the frame plates and drives the drive shaft. The two ends of the drive shaft are rotatably mounted on the two frame plates respectively. The two cams are fixedly sleeved on the two ends of the drive shaft respectively. The circumferential surface of the cams abuts against the bottom of the support plate to push the support plate to move up and down.

[0021] The end paper feeder unit of the paper feeder includes a conveying drive mechanism comprising a conveying motor, a synchronous belt and multiple synchronous pulleys. The conveying motor is fixedly mounted on one of the frame plates and is driven and connected to multiple synchronous pulleys via the synchronous belt. The multiple synchronous pulleys are respectively fixedly connected to one end of the printing lower roller and multiple roller shafts.

[0022] The end feeder unit of the paper feeder further includes a locking mechanism, which includes a locking cylinder and a locking element. The locking cylinder is installed on the bottom surface of the delamination plate, and the drive rod of the locking cylinder passes through the delamination plate and enters the air distribution chamber. The locking element is fixedly connected to the end of the drive rod of the locking cylinder. The locking element is provided with an arc-shaped groove, which is adapted to the roller surface of the roller body. The locking cylinder drives the locking element to rise so that the arc-shaped groove clamps the roller body and locks the roller body so that it no longer rotates.

[0023] Beneficial effects:

[0024] This utility model provides an end-feed unit for a paper feeder, including a bellows, a conveyor roller assembly, a printing roller, a frame plate, a support mechanism, a lifting drive mechanism, and a conveying drive mechanism. The bellows is equipped with a sealing plate, and the support mechanism is equipped with a snap-fit ​​shaft for detachably engaging with a previous universal paper feeder unit. This end-feed unit, through the combination of an end-sealing design, a detachable snap-fit ​​structure, and an integrated drive system, allows the bellows end sealing plate to directly seal the negative pressure chamber, eliminating paper adsorption instability caused by airflow leakage. Simultaneously, the snap-fit ​​shaft of the support mechanism allows for a quick-assembly and disassembly mechanism by manually inserting and removing it from the universal unit interface. The lifting drive mechanism, in conjunction with the support mechanism, drives the printing roller to dynamically adjust the printing pressure, while the conveying drive mechanism synchronously controls the printing roller and the conveyor roller assembly to form a closed-loop power transmission. Overall, it achieves the core objectives of reliable end-station adsorption, convenient assembly and disassembly, and precise operation. Attached Figure Description

[0025] Figure 1 A three-dimensional structural diagram of the end-feeding unit provided by this utility model;

[0026] Figure 2 An exploded view of the end-feeding unit provided by this utility model;

[0027] Figure 3 This is a schematic diagram of the main structure of the bellows provided by this utility model;

[0028] Figure 4 A schematic diagram of the specific structure of the bellows provided by this utility model;

[0029] Figure 5 A schematic diagram of the assembly structure of the partition plate and damper provided by this utility model;

[0030] Figure 6A schematic diagram of the main structure of the end-feed paper unit provided by this utility model;

[0031] Figure 7 A three-dimensional structural diagram of the locking mechanism provided by this utility model.

[0032] Figure label:

[0033] 1—Blowbox 2—Conveyor Roller Set 3—Support Mechanism

[0034] 4—Printing lower roller; 5—Frame plate; 6—Lifting drive mechanism

[0035] 7—Transmission drive mechanism; 8—Locking mechanism; 11—Groove

[0036] 12—Sealing plate; 13—Vacuum chamber; 14—Air distribution chamber

[0037] 15—Layered panel 16—Separator panel 17—Air damper

[0038] 18—Switch / Opener Component 19—Opening / Closing Cylinder 21—Roller Shaft

[0039] 22—Roller body; 31—Snap-fit ​​shaft; 32—Support plate

[0040] 33—Connecting plate; 34—Mounting plate; 35—Slider

[0041] 51—Third through hole; 52—Slide rail; 61—Lifting motor

[0042] 62—Drive shaft; 63—Cam; 71—Transmission motor

[0043] 72—Synchronous belt; 73—Synchronous pulley; 81—Locking cylinder

[0044] 82—Locking component; 131—Second through hole; 141—Allowance hole

[0045] 151—First through hole; 161—Vent hole. Detailed Implementation

[0046] This utility model provides an end-feed 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.

[0047] 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.

[0048] Please see Figures 1 to 7 As shown, this utility model provides an end-feed unit for a paper feeder, comprising:

[0049] The air box 1 has a groove 11 at the beginning of the paper conveying direction and a sealing plate 12 at the end of the paper conveying direction. The sealing plate 12 is used to seal the negative pressure environment when used as the end of the paper feeder to adapt to the end position.

[0050] The conveyor roller assembly 2 is integrated and installed in the air box 1, with the conveying surface higher than the top surface of the air box 1;

[0051] Two support mechanisms 3 are symmetrically arranged at both ends of the length of the bellows 1. Each support mechanism 3 includes a snap-fit ​​shaft 31, which is used to snap-fit ​​with the previous general paper feeder unit to realize quick connection and disassembly between paper feeder units.

[0052] The printing lower roller 4 has two ends that are rotatably mounted on two support mechanisms 3, and the circumferential surface of the printing lower roller 4 is adapted to the groove 11.

[0053] Two frame plates 5 are symmetrically arranged at both ends of the length of the air box 1, and two support mechanisms 3 are slidably connected to the two frame plates 5 respectively;

[0054] The lifting drive mechanism 6 drives and connects two support mechanisms 3, enabling the two support mechanisms 3 to lift and move synchronously.

[0055] The transmission drive mechanism 7 drives the printing lower roller 4 and the transmission roller group 2 to rotate synchronously.

[0056] In actual production, this end-of-line paper feeder unit is spliced ​​with other general-purpose paper feeder units to form a printing paper feeder. Part of the circumference of the printing lower roller 4 of this end-of-line unit is embedded in the groove 11 of the air box 1, while another part of its circumference is embedded in the groove 11 of the air box 1 of the adjacent general-purpose unit. The snap-fit ​​shaft 31 can be detachably snapped into the snap-fit ​​interface of the adjacent paper feeder unit, enabling convenient splicing of the units. The sealing plate 12 of the air box 1 seals and blocks the end of the air box 1, sealing the negative pressure environment and preventing paper shifting due to the failure of the negative pressure adsorption function. Simultaneously, the snap-fit ​​shaft 31 of the support mechanism 3 is manually inserted and removed from the interface of the general-purpose unit, forming a quick assembly and disassembly mechanism. The lifting drive mechanism 6, in conjunction with the support mechanism 3, lifts and slides the entire unit, driving the printing lower roller 4 to dynamically adjust the printing pressure. Meanwhile, the conveying drive mechanism 7 synchronously controls the printing lower roller 4 and the conveying roller group 2 to form a closed-loop power transmission. Overall, the core objectives of reliable adsorption, convenient assembly and disassembly, and precise operation at the end-of-line station are achieved.

[0057] In this embodiment, the groove 11 of the air box 1 is connected to the air distribution chamber 14, so that when the circumferential surface of the printing roller 4 is embedded in the groove 11 of the machine unit and the groove 11 of the adjacent general-purpose machine unit, there is a gap between the printing roller 4 and the groove 11 so that the printing roller 4 is also in a negative pressure environment, and the connection gap between the air boxes 1 of the two units also has an adsorption force. Setting the printing roller 4 at the edge of the air box 1 is beneficial for cleaning and maintenance of the printing roller 4.

[0058] In this embodiment, the two ends of the printing roller 4 are rotatably mounted on the support mechanism 3 via bearings. The highest point of the circumference of the printing roller 4 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 roller 4 can contact the paper and print the pattern on the paper.

[0059] In this embodiment, the snap-fit ​​shaft 31 is fitted with a bearing so that when the height of the lower printing roller 4 is adjusted after the adjacent general-purpose paper feeding units are spliced ​​together, it can tilt and swing relative to the end paper feeding unit. Two support mechanisms 3 are symmetrically arranged at both ends of the bellows 1 along its length, and two frame plates 5 are also symmetrically arranged at both ends of the bellows 1 along its length. When adjusting the height of the lower printing roller 4, the two support mechanisms 3 slide and rise synchronously relative to the two frame plates 5 to ensure the balance of the lower printing roller 4, the bellows 1, and the conveyor roller group 2 in the paper width direction, and to prevent the paper from tilting to one side during the paper conveying process. The two frame plates 5 are connected and fixed by the support mechanisms 3 and the bellows 1, so that they can stand stably on the floor of the production workshop during application, supporting the entire paper feeding unit.

[0060] In this embodiment, there is one lifting drive mechanism 6. One lifting drive mechanism 6 drives two support mechanisms 3 to lift and lower synchronously to ensure the balance of the printing roller 4, 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.

[0061] In this embodiment, the conveying drive mechanism 7 can be a conventional synchronous transmission structure such as gear transmission or belt transmission. The conveying drive mechanism 7 synchronously drives the printing roller 4 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 7 for synchronous driving can eliminate the need to adjust the speed of the printing roller 4 and the conveying roller group 2 to be consistent, making it convenient to use.

[0062] Please see Figures 2 to 4 As shown, the bellows 1 includes a vacuum chamber 13 and a distribution chamber 14, which are separated by a layered plate 15. The layered plate 15 has a first through hole 151 to connect the vacuum chamber 13 and the distribution chamber 14. One end of the vacuum chamber 13 has a second through hole 131 to connect to an external vacuum pumping device. A third through hole 51 is provided on a frame plate 5 near the second through hole 131. The third through hole 51 is provided corresponding to the second through hole 131 and is used for the vacuum pumping pipeline to pass through and enter the second through hole 131. A groove 11 is provided on the edge of the distribution chamber 14. In this embodiment, the first through hole 151 is located in the middle of the layered plate 15. The external vacuum pumping device is connected to the second through hole 131 of the vacuum chamber 13 through a vacuum pumping pipeline. The third through hole 51 facilitates the connection between the bellows 1 and the vacuum pumping device. The vacuum chamber 13 is only connected to the air chamber in the middle position. When evacuating, the airflow enters the air chamber from the top of the bellows 1 and the groove 11. The airflow in the air chambers on both sides converges into the middle air chamber through the damper 17, and then enters the vacuum chamber 13. Finally, it enters the vacuum equipment in the outside through the pipeline.

[0063] Please see Figures 1 to 3 As shown, the top surface of the bellows 1 is arrayed with multiple clearance holes 141, which are used to allow the conveying surface of the conveyor roller assembly 2 to protrude from the top surface 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 141 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.

[0064] Please see Figures 2 to 5As shown, the air distribution chamber 14 is provided with multiple partition plates 16 at intervals along its length, dividing the air distribution chamber 14 into multiple air chambers. Each partition plate 16 is provided with a vent hole 161 to connect the multiple air chambers. A closable damper 17 is hinged to the lower side of the vent hole 161. The damper 17 is connected to a switch 18, which is driven by an opening / closing cylinder 19. The opening / closing cylinder 19 is fixedly installed on the outside of the vacuum chamber 13. In this embodiment, with the first through hole 151 of the bellows 1 as the boundary, the damper 17 on the left opens to the left, and the damper 17 on the right opens to the right. Each damper 17 is driven to open or close by an independent opening / closing cylinder 19. The vacuum chamber 13 is only connected to the air chamber in the middle position. During vacuuming, the airflow enters the air chamber from the top of the bellows 1. The airflow in the air chambers on both sides converges into the middle air chamber through the damper 17, then enters the vacuum chamber 13, and finally enters the external vacuuming equipment through the pipeline. When actually conveying paper, the opening and closing cylinder 19 can be controlled to open the air door 17 according to the width of the paper being conveyed, thereby controlling the negative pressure width of the air box 1. If the paper width is small, only the air door 17 near the middle is opened, and the air doors 17 on both sides that are not covered by paper are closed, which can save energy consumption of the vacuum equipment. If the paper width is large, all air doors 17 are opened to make the adsorption force on the paper uniform and stable.

[0065] Please see Figures 1 to 2 As shown, the support mechanism 3 includes a support plate 32, a connecting plate 33, and a mounting plate 34. The support plate 32 is slidably connected to the frame plate 5. The two ends of the connecting plate 33 are respectively fixedly connected to the support plate 32 and the mounting plate 34. The mounting plate 34 is used to rotatably mount the printing roller 4. The layered plate 15 of the air box 1 is fixedly connected to the upper end of the support plate 32 by bolts. In this embodiment, the upper end of the support plate 32 is fixedly mounted with a snap-fit ​​shaft 31 by bolts. The snap-fit ​​shaft 31 and the mounting plate 34 are offset to avoid interference between the snap-fit ​​shaft 31 and the printing roller 4. One end of the support plate 32 and the connecting plate 33, and the other end of the mounting plate 34 and the connecting plate 33 are all limited by mortise and tenon structure and then fixedly connected by bolts. The mounting plate 34 includes an upper plate body and a lower plate body with semi-circular grooves. The upper plate body and the lower plate body are fixedly connected by bolts so that the two semi-circular grooves merge to form a mounting hole. The two ends of the printing roller 4 are mounted in the mounting hole by bearings. The support plate 32 and the mounting plate 34 are connected by the connecting plate 33, so that a space for installing the pulley drive mechanism is formed between the mounting plate 34 and the support plate 32.

[0066] Please see Figures 1 to 2As shown, a slider 35 is fixedly installed on the side of the support plate 32 near the frame plate 5. The slider 35 is slidably connected to a slide rail 52, which is fixedly installed on the frame plate 5. In this embodiment, a receiving groove is provided on the side of the support plate 32 away from the air box 1 to accommodate the slider 35. The length of the receiving groove is greater than the length of the slide rail 52. The receiving groove accommodates the slide rail 52 and the slider 35, which can shorten the distance between the support plate 32 and the frame plate 5, making the unit structure more compact. It can also shield and protect the sliding structure of the slide rail 52 and the slider 35, 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 32, and the pad is fixed to the bottom end of the lower plate by bolts.

[0067] Please see Figures 2 to 3 As shown, the conveyor roller assembly 2 includes multiple axially parallel roller shafts 21. The two ends of each roller shaft 21 are rotatably mounted on two end plates along the length of the bellows 1. Multiple roller bodies 22 are spaced apart on each roller shaft 21, with the roller bodies 22 on adjacent roller shafts 21 being staggered. The roller surfaces of the roller bodies 22 protrude from the top surface of the bellows 1 through multiple clearance holes 141. In this embodiment, the multiple roller shafts 21 are axially parallel and uniformly arranged in the width direction of the bellows 1, i.e., the paper conveying direction. The two ends of each roller shaft 21 are rotatably mounted on the end plates along the length of the bellows 1 via bearings. Each roller shaft 21 rotatably passes through the multiple partitions via multiple bearings. The staggered arrangement of the multiple conveyor roller bodies 22 on adjacent roller shafts 21 increases the contact area between the conveyor roller assembly 2 and the paper in the paper width direction, improving conveying stability and adaptability to the width of the conveyed paper.

[0068] Please see Figure 2 As shown, the lifting drive mechanism 6 includes a lifting motor 61, a drive shaft 62, and two cams 63. The lifting motor 61 is mounted on one of the frame plates 5 and drives the drive shaft 62. The two ends of the drive shaft 62 are rotatably mounted on the two frame plates 5 respectively. The two cams 63 are fixedly sleeved on the two ends of the drive shaft 62. The circumferential surface of the cam 63 abuts against the bottom of the support plate 32 to push the support plate 32 to move up and down. In this embodiment, the lifting motor 61 drives the drive shaft 62 through a coupling. The two ends of the drive shaft 62 are rotatably connected to the two frame plates 5 through bearings. The cam 63 is fixedly sleeved on the outside of the drive shaft 62 by a limiting pin. The cam 63 is an eccentric wheel. The outer circumferential surface of the cam 63 abuts against the pad of the support plate 32 to avoid the cam 63 and the support plate 32 wearing against each other, which would affect the accuracy. Replacing the support plate 32 is relatively troublesome, but replacing the pad after it wears out is relatively convenient.

[0069] Please see Figures 1 to 2 , Figure 6As shown, the conveying drive mechanism 7 includes a conveying motor 71, a synchronous belt 72, and multiple synchronous pulleys 73. The conveying motor 71 is fixedly mounted on one of the frame plates 5 and is driven by the synchronous belt 72 to connect to the multiple synchronous pulleys 73. The multiple synchronous pulleys 73 are respectively fixedly connected to one end of the printing lower roller 4 and multiple roller shafts 21. In this embodiment, the conveying motor 71 is driven to one end of the printing lower roller 4 via a coupling. The other end of the printing lower roller 4 and the conveying roller group 2 are connected to the synchronous belt 72 via the synchronous pulleys 73. The synchronous belt 72 and the synchronous pulleys 73 are located in the space between the support plate 32 and the mounting plate 34.

[0070] Please see Figure 7 As shown, it also includes a locking mechanism 8, which includes a locking cylinder 81 and a locking element 82. The locking cylinder 81 is installed on the bottom surface of the layer plate 15. The drive rod of the locking cylinder 81 passes through the layer plate 15 and enters the air distribution chamber 14. The locking element 82 is fixedly connected to the end of the drive rod of the locking cylinder 81. The locking element 82 is provided with an arc-shaped groove, which is adapted to the roller surface of the roller body 22. The locking cylinder 81 drives the locking element 82 to rise so that the arc-shaped groove clamps the roller body 22 and locks the roller body 22 so that it no longer rotates. In this embodiment, the locking mechanism 8 is located at one end of the length direction of the wind box 1. The locking cylinder 81 is fixedly installed on the layered plate 15 of the wind box 1 by bolts and is located at the end of the layered plate 15 to avoid the vacuum chamber 13. A limit rod is provided on one side of the locking member 82. The end of the limit rod abuts against the side plate of the wind box 1 to prevent the locking member 82 from rotating around the axis of the driving rod of the locking cylinder 81, thereby affecting the locking accuracy of the locking member 82 on the conveyor roller group 2.

[0071] In summary, this invention, through the combination of an end-sealing design, a detachable snap-fit ​​structure, and an integrated drive system, allows the end-sealing plate 12 of the air box 1 to directly seal the negative pressure cavity, eliminating paper adsorption instability caused by airflow leakage. Simultaneously, the snap-fit ​​shaft 31 of the support mechanism 3 engages with the universal unit interface via manual insertion and removal, forming a quick assembly / disassembly mechanism. The lifting drive mechanism 6, in conjunction with the overall lifting and sliding of the support mechanism 3, drives the lower printing roller 4 to dynamically adjust the printing pressure, while the conveying drive mechanism 7 synchronously controls the lower printing roller 4 and the conveying roller group 2 to form a closed-loop power transmission. Overall, this invention achieves the core objectives of reliable adsorption at the end station, convenient assembly / disassembly, and precise operation.

[0072] 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. An end-feed unit for a paper feeder, characterized in that, include: The bellows (1) has a groove (11) at the beginning of the paper conveying direction and a sealing plate (12) at the end of the paper conveying direction. The sealing plate (12) is used to seal the negative pressure environment when used as the end of the paper feeder to adapt to the end position. The conveyor roller assembly (2) is integrated and installed in the air box (1), with the conveying surface higher than the top surface of the air box (1); Two support mechanisms (3) are symmetrically arranged at both ends of the bellows (1) along its length. Each support mechanism (3) includes a snap-fit ​​shaft (31) for detachably snapping with the previous general paper feeder unit to achieve quick connection and disassembly between paper feeder units. A printing roller (4) is rotatably mounted at both ends of the two support mechanisms (3). The circumferential surface of the printing roller (4) is adapted to the groove (11). Two frame plates (5) are symmetrically arranged at both ends of the length of the bellows (1), and two support mechanisms (3) are slidably connected to the two frame plates (5); The lifting drive mechanism (6) drives the two support mechanisms (3) and makes the two support mechanisms (3) move up and down synchronously; The transmission drive mechanism (7) drives the printing lower roller (4) and the transmission roller group (2) to rotate synchronously.

2. The end feeder unit of the paper feeder according to claim 1, characterized in that, The bellows (1) includes a vacuum chamber (13) and a distribution chamber (14). The vacuum chamber (13) and the distribution chamber (14) are separated by a layered plate (15). The layered plate (15) is provided with a first through hole (151) to connect the vacuum chamber (13) and the distribution chamber (14). One end of the vacuum chamber (13) is provided with a second through hole (131) to connect to the external vacuum pumping equipment. A third through hole (51) is provided on a frame plate (5) near the second through hole (131). The third through hole (51) is provided corresponding to the second through hole (131) and is used to allow the vacuum pumping pipeline to pass through and enter the second through hole (131). A groove (11) is provided on the edge of the distribution chamber (14).

3. The end feeder unit of the paper feeder according to claim 2, characterized in that, The top surface of the bellows (1) is provided with a plurality of clearance holes (141), which are used to allow the conveying surface of the conveying roller group (2) to protrude from the top surface of the bellows (1).

4. The end feeder unit of the paper feeder according to claim 3, characterized in that, The air distribution chamber (14) is provided with multiple partition plates (16) at intervals along its length. The multiple partition plates (16) divide the air distribution chamber (14) into multiple air chambers. Each partition plate (16) is provided with a vent hole (161) to connect the multiple air chambers. A closable damper (17) is hinged to the lower side of the vent hole (161). The damper (17) is connected to a switch (18). The switch (18) is driven to the opening and closing cylinder (19). The opening and closing cylinder (19) is fixedly installed on the outside of the vacuum chamber (13).

5. The end feeder unit of the paper feeder according to claim 2, characterized in that, The support mechanism (3) includes a support plate (32), a connecting plate (33) and a mounting plate (34). The support plate (32) is slidably connected to the frame plate (5). The two ends of the connecting plate (33) are fixedly connected to the support plate (32) and the mounting plate (34) respectively. The mounting plate (34) is used to rotate and install the printing roller (4). The layer plate (15) of the air box (1) is fixedly connected to the upper end of the support plate (32).

6. The end feeder unit of the paper feeder according to claim 5, characterized in that, A slider (35) is fixedly installed on the side of the support plate (32) near the frame plate (5). The slider (35) is slidably connected to a slide rail (52), which is fixedly installed on the frame plate (5).

7. The end feeder unit of the paper feeder according to claim 3, characterized in that, The conveyor roller group (2) includes multiple axially parallel roller shafts (21). The two ends of the multiple roller shafts (21) are respectively rotatably mounted on two end plates in the length direction of the wind box (1). Multiple roller bodies (22) are spaced apart on each roller shaft (21). The multiple roller bodies (22) on two adjacent roller shafts (21) are staggered. The roller surfaces of the multiple roller bodies (22) protrude from the top surface of the wind box (1) through multiple clearance holes (141).

8. The end feeder unit of the paper feeder according to claim 5, characterized in that, The lifting drive mechanism (6) includes a lifting motor (61), a drive shaft (62) and two cams (63). The lifting motor (61) is mounted on one of the frame plates (5) and drives the drive shaft (62). The two ends of the drive shaft (62) are rotatably mounted on the two frame plates (5). The two cams (63) are fixedly sleeved on the two ends of the drive shaft (62). The circumferential surface of the cam (63) abuts against the bottom of the support plate (32) to push the support plate (32) to move up and down.

9. The end feeder unit of the paper feeder according to claim 7, characterized in that, The conveying drive mechanism (7) includes a conveying motor (71), a synchronous belt (72) and multiple synchronous pulleys (73). The conveying motor (71) is fixedly mounted on one of the frame plates (5) and is driven by the synchronous belt (72) to connect multiple synchronous pulleys (73). The multiple synchronous pulleys (73) are respectively fixedly connected to one end of the printing roller (4) and multiple roller shafts (21).

10. The end feeder unit of the paper feeder according to claim 7, characterized in that, It also includes a locking mechanism (8), which includes a locking cylinder (81) and a locking member (82). The locking cylinder (81) is installed on the bottom surface of the layer plate (15). The drive rod of the locking cylinder (81) passes through the layer plate (15) and enters the air distribution chamber (14). The locking member (82) is fixedly connected to the end of the drive rod of the locking cylinder (81). The locking member (82) is provided with an arc-shaped groove. The arc-shaped groove is adapted to the roller surface of the roller body (22). The locking cylinder (81) drives the locking member (82) to rise so that the arc-shaped groove clamps the roller body (22) so that the roller body (22) no longer rotates.

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