An invoice terminal management and printing device

Abstract

The present invention relates to the technical field of printers, and discloses an invoice terminal management and printing device, which includes a body. A dot matrix printing component is arranged inside the body. A central roller, a plurality of paper guiding rollers and two paper pulling rollers are rotatably installed inside the body. A first paper pulling ring and a second paper pulling ring are rotatably installed on the surface of the central roller. The dot matrix printing component is arranged in the area between the two paper pulling rollers. Needle sleeves are arranged on the surfaces of the paper pulling rollers. A plurality of separating rods are fixedly installed inside the body. A plurality of paper outlet windows are opened on the surface of the body. For this invoice terminal management and printing device, by respectively arranging paper pulling rollers and paper guiding rollers around the central roller, and arranging separating rods, the chain invoices are separated before printing, then combined and printed, and finally separated and output. The transmission of invoice papers is more reliable, and the function of automatic separation is realized, so that the stub copies can be stored separately, meeting the use requirements of self-service printing terminals.

Description

Technical Field

[0001] The present invention relates to the technical field of printers, and particularly to an invoice terminal management and printing device. Background Art

[0002] After the invoice bill is printed, generally manual splitting operation is required to leave the stub copy. In order to realize the invoice printing and automatic splitting of a self-service printing terminal, in the prior art, a patent document with the publication number of CN103042835B discloses a multi-sheet chain-type invoice splitting and printing device. The printing device includes: a splitting and guiding unit, which is fixed to the rear end (the multi-sheet chain-type invoice feeding end) of a dot matrix printer by a splitting and guiding assembly. The splitting and guiding assembly is composed of: a left guiding fixed seat, a right guiding fixed seat, a lower supporting rod, a rear ribbon rod, two torsion springs, and an adjusting knob; a flexible transmission unit, which is composed of three ribbons with flexible characteristics; an adjusting unit, which is fixed to the bottom of the front end (the multi-sheet chain-type invoice discharging end) of the dot matrix printer by an adjusting assembly. The multi-sheet chain-type invoice splitting and printing technology of the present invention provides a solution for enabling a multi-sheet chain-type invoice to be output from different direction channels according to requirements after one-time printing through flexible transmission.

[0003] Since the current splitting and printing devices all perform splitting after printing, this causes the sheets of each copy to stick to each other, and it is very difficult to separate them by machine. Especially when printing a single invoice, the area of a single invoice is small, and there are instabilities in positioning and conveying, and the position of the printed text often shifts, affecting the use. Based on this, the existing printing devices are not reliable enough in the functions of transmitting invoice papers and automatic splitting, and cannot meet the usage requirements of self-service printing terminals, and need to be further improved. Summary of the Invention

[0004] The purpose of the present invention is to solve the disadvantages that the existing printing devices are not reliable enough in the functions of transmitting invoice papers and automatic splitting and cannot meet the usage requirements of self-service printing terminals, and to propose an invoice terminal management and printing device.

[0005] To achieve the above purpose, the present invention adopts the following technical solution: An invoice terminal management and printing device includes a machine body. A dot matrix printing assembly is arranged inside the machine body. A central roller, a plurality of paper guiding rollers, and two paper pulling rollers are rotatably installed inside the machine body. A first paper pulling ring and a second paper pulling ring are rotatably installed on the surface of the central roller. The dot matrix printing assembly is arranged in the area formed between the two paper pulling rollers. Needle sleeves are arranged on the surface of the paper pulling rollers.

[0006] Two gear drive shafts are rotatably installed inside the machine body. A plurality of drive motors are fixedly installed inside the machine body. The plurality of drive motors respectively drive the central roller, a plurality of paper guiding rollers and the two gear drive shafts to rotate. The two gear drive shafts respectively drive the first paper pulling ring and the second paper pulling ring to rotate. The needle sleeve pierces the surfaces of the first paper pulling ring and the second paper pulling ring, so that the needle sleeve rotates together with the first paper pulling ring and the second paper pulling ring.

[0007] A plurality of sub-link rods are fixedly installed inside the machine body. A plurality of paper outlet windows are formed on the surface of the machine body. The chain invoice is divided into page states by the sub-link rods. The needle sleeve rotates synchronously with the first paper pulling ring or the second paper pulling ring and clamps the chain invoice to convey the chain invoice. After the needle-type printing component completes the printing of the chain invoice, the paper guiding rollers are used to separate the chain invoice and discharge the separated pages from each paper outlet window, realizing the function of automatic separation, so that the stub copy can be stored separately and other copies can be taken away to meet the use requirements of the self-service printing terminal.

[0008] Preferably, the needle sleeve includes a sleeve body. A plurality of sheet grooves arranged in an annular array are formed on the surface of the sleeve body. A movable plate is rotatably installed in each sheet groove. Two needle heads are fixedly installed on the surface of the movable plate. A connecting ball is fixedly installed on the inner side of the movable plate. A magnetic ring is slidably installed inside the sleeve body. A connecting groove is formed on the surface of the magnetic ring. The connecting ball extends into the connecting groove. A drive sleeve is rotatably sleeved at the end of the paper pulling roller. The drive sleeve is fixedly connected to the inner wall of the machine body, and an electromagnetic coil is embedded inside the drive sleeve. Two reset springs are arranged inside the sleeve body, and the two reset springs respectively abut against both ends of the magnetic ring. The electromagnetic coil conducts currents in different directions to generate a magnetic field that attracts or repels the magnetic ring, driving the magnetic ring to move left and right, thereby driving the movable plate to flip.

[0009] Preferably, there are two first paper pulling rings and two second paper pulling rings respectively. The two first paper pulling rings and the second paper pulling rings are respectively arranged in the groove at both ends of the central roller. Needle sleeves and drive sleeves are arranged at both ends of the paper pulling roller. A rubber layer is provided on the outer circumferential surface of the first paper pulling ring and the second paper pulling ring. The surface of the rubber layer is flush with the outer circumferential surface of the central roller. The two needle heads can respectively pierce into the rubber layers of the first paper pulling ring and the second paper pulling ring, achieving the effect of printing a single invoice and outputting different separated pages, and solving the problem that when printing a single invoice, the output requires backing up blank paper, which is prone to wrinkling and deviation.

[0010] Preferably, the plurality of paper guiding rollers include a first roller shaft, a second roller shaft and a third roller shaft. The plurality of drive motors include a first servo motor, a second servo motor and two third servo motors.

[0011] The rotating end of the first servo motor is fixedly connected to the end of the first roller. Synchronous wheels are fixedly installed at the ends of the first roller, the second roller, and the third roller. The three synchronous wheels are driven by a synchronous belt. The rotating end of the second servo motor is fixedly connected to the end of the central drum. The rotating ends of the two third servo motors are respectively fixedly connected to the ends of the two gear transmission shafts. Tooth grooves are provided on the outer circumferential surfaces of the first paper pulling ring and the second paper pulling ring. Gears are provided on the surfaces of the two gear transmission shafts. The two gear transmission shafts are respectively driven by the meshing of the gears and the tooth grooves to drive the first paper pulling ring and the second paper pulling ring to rotate independently.

[0012] Preferably, air holes are provided on the surfaces of the second roller and the third roller. The ends of the second roller and the third roller are connected to a negative pressure air pipe through a rotary joint. The negative pressure air pipe is communicated with the air holes through air channels inside the second roller and the third roller. The multiple paper output windows include a first window, a second window, and a third window. The second roller and the third roller are respectively arranged at the inlets of the first window and the second window. A storage box is inserted into the third window. The chain invoice is separated by a paper guiding roller and the separated pages are discharged from each paper output window.

[0013] Preferably, multiple arc-shaped inner lining plates are fixedly installed inside the machine body. The multiple arc-shaped inner lining plates are arranged in a circular array around the central drum and a gap for conveying the chain invoice is reserved with the outer surface of the central drum.

[0014] The present invention has the following beneficial effects:

[0015] 1. For this invoice terminal management and printing device, by respectively arranging paper pulling rollers, paper guiding rollers around the central drum, and a separating rod, the chain invoice is separated before printing, then combined and printed, and finally separated and output. The transmission of the invoice paper is more reliable, and the function of automatic separation is realized, so that the stub copy can be stored separately and other copies can be taken away, meeting the use requirements of the self-service printing terminal.

[0016] 2. The present invention realizes a printing method of separation - combined printing - re - separation, reducing the difficulty of separating after printing. Especially when printing a single invoice, after the blank chain invoice is input and printed, the single invoice is separated by the speed difference between the first paper pulling ring and the second paper pulling ring. The single invoice can be separately separated and output at the second roller and the third roller, so as to achieve the effect of printing a single invoice and outputting different separated pages, solving the problem that when printing a single invoice, the output requires backing up blank paper, which is easy to wrinkle and deviate.

[0017] 3. By providing a driven rotating needle sleeve on the surface of the paper feeding roller, the needle sleeve presses the chain invoice against the surfaces of the first paper feeding ring and the second paper feeding ring, and its needle tips can penetrate through the chain invoice and pierce into the surfaces of the first paper feeding ring and the second paper feeding ring. Since the chain invoice is separated into multiple copies before printing, the invoice pages of each layer are prone to deviation. The needle tips on the surface of the needle sleeve can tension the invoice paper and staple it to prevent deviation.

[0018] 4. The present invention designs two paper feeding rollers and arranges needle sleeves at both ends of the two paper feeding rollers. The movable plate swings, enabling different needle tips to pierce into the surfaces of the first paper feeding ring and the second paper feeding ring respectively. It can not only utilize the rotational speed difference between the first paper feeding ring and the second paper feeding ring to separate the connected invoices, but also adjust the angle of the chain invoice by the forward and reverse rotation of the first paper feeding ring and the second paper feeding ring, thereby achieving the effect of correcting the position of the invoice paper, solving the problem of offset in the text printing position, and improving the printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 is a schematic three-dimensional structure diagram of the whole of the present invention;

[0020] Figure 2 is a schematic side-sectional structure diagram of the whole of the present invention;

[0021] Figure 3 is a schematic three-dimensional structure diagram of the central drum of the present invention Figure 1 ;

[0022] Figure 4 is a schematic three-dimensional structure diagram of the central drum of the present invention Figure 2 ;

[0023] Figure 5 is a schematic three-dimensional structure diagram of the central drum of the present invention Figure 3 ;

[0024] Figure 6 is a schematic three-dimensional structure diagram of the central drum of the present invention Figure 4 ;

[0025] Figure 7 is Figure 6 a schematic enlarged structure diagram of the H position in

[0026] Figure 8 is a schematic sectional structure diagram of the central drum of the present invention;

[0027] Figure 9 is Figure 8 a schematic enlarged structure diagram of the F position in

[0028] Figure 10 is Figure 9 a schematic diagram of the flipping of the movable plate in

[0029] Figure 11Schematic diagram of the central roller and the chain invoice.

[0030] In the figure: 1 body, 2 pin-type printing component, 3 central roller, 4 paper guiding roller, 5 paper pulling roller, 6 first paper pulling ring, 7 second paper pulling ring, 8 needle sleeve, 9 gear transmission shaft, 10 separating rod, 11 chain invoice, 12 sleeve body, 13 movable plate, 14 needle tip, 15 connecting ball, 16 magnetic ring, 17 driving sleeve, 18 electromagnetic coil, 19 return spring, 20 first roller, 21 second roller, 22 third roller, 23 first servo motor, 24 second servo motor, 25 third servo motor, 26 negative pressure air pipe, 27 first window, 28 second window, 29 third window, 30 storage box, 31 arc-shaped inner lining plate. Detailed implementation manners

[0031] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0032] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and 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 to the present invention.

[0033] Refer to Figures 1 - 11 , an invoice terminal management and printing device, including a body 1, a pin-type printing component 2 is arranged inside the body 1, a central roller 3, a plurality of paper guiding rollers 4 and two paper pulling rollers 5 are rotatably installed inside the body 1, a first paper pulling ring 6 and a second paper pulling ring 7 are rotatably installed on the surface of the central roller 3, the pin-type printing component 2 is arranged in the area formed between the two paper pulling rollers 5, and a needle sleeve 8 is arranged on the surface of the paper pulling roller 5.

[0034] Specifically, as Figure 9 shown, the needle sleeve 8 includes a sleeve body 12, a plurality of sheet grooves arranged in a circular array are formed on the surface of the sleeve body 12, a movable plate 13 is rotatably installed in each sheet groove, two needle tips 14 are fixedly installed on the surface of the movable plate 13, a connecting ball 15 is fixedly installed inside the movable plate 13, a magnetic ring 16 is slidably installed inside the sleeve body 12, a connecting groove is formed on the surface of the magnetic ring 16, and the connecting ball 15 extends into the connecting groove.

[0035] The end of the paper pulling roller 5 is rotatably sleeved with a driving sleeve 17. The driving sleeve 17 is fixedly connected to the inner wall of the machine body 1, and an electromagnetic coil 18 is embedded inside the driving sleeve 17. Two reset springs 19 are arranged inside the sleeve body 12, and the two reset springs 19 respectively abut against both ends of the magnetic ring 16. When different-direction currents are introduced into the electromagnetic coil 18, a magnetic field that attracts or repels the magnetic ring 16 is generated, driving the magnetic ring 16 to move left and right, thereby driving the movable plate 13 to flip, as Figure 10 shown in Figures A and B of the attached drawings.

[0036] Two gear transmission shafts 9 are rotatably installed inside the machine body 1. A plurality of driving motors are fixedly installed inside the machine body 1. The plurality of driving motors respectively drive the central roller 3, the plurality of paper guiding rollers 4 and the two gear transmission shafts 9 to rotate. The two gear transmission shafts 9 respectively drive the first paper pulling ring 6 and the second paper pulling ring 7 to rotate. The needle sleeve 8 pierces the surfaces of the first paper pulling ring 6 and the second paper pulling ring 7, so that the needle sleeve 8 rotates together with the first paper pulling ring 6 and the second paper pulling ring 7.

[0037] Among them, the plurality of paper guiding rollers 4 include a first roller shaft 20, a second roller shaft 21 and a third roller shaft 22, as Figure 4 shown. The plurality of driving motors include a first servo motor 23, a second servo motor 24 and two third servo motors 25, as Figure 5 shown.

[0038] The rotating end of the first servo motor 23 is fixedly connected to the end of the first roller shaft 20. Synchronous wheels are fixedly installed at the ends of the first roller shaft 20, the second roller shaft 21 and the third roller shaft 22. The three synchronous wheels are driven by a synchronous belt. The rotating end of the second servo motor 24 is fixedly connected to the end of the central roller 3. The rotating ends of the two third servo motors 25 are respectively fixedly connected to the ends of the two gear transmission shafts 9. Tooth grooves are formed on the outer circumferential surfaces of the first paper pulling ring 6 and the second paper pulling ring 7. Gears are arranged on the surfaces of the two gear transmission shafts 9. The two gear transmission shafts 9 respectively drive the first paper pulling ring 6 and the second paper pulling ring 7 to rotate independently through the meshing of the gears and the tooth grooves.

[0039] Air holes (not shown in the attached drawings) are formed on the surfaces of the second roller shaft 21 and the third roller shaft 22. The ends of the second roller shaft 21 and the third roller shaft 22 are connected to a negative pressure air pipe 26 through a rotary joint (the rotary joint is an existing rotational connection component and will not be elaborated here). The negative pressure air pipe 26 is communicated with the air holes through air channels inside the second roller shaft 21 and the third roller shaft 22. By pumping air from the negative pressure air pipe 26, the invoice paper can be adsorbed on the surface of the second roller shaft 21 or the third roller shaft 22.

[0040] As Figure 2As shown in the figure, a plurality of sub-link rods 10 are fixedly installed inside the body 1. A plurality of paper outlet windows are provided on the surface of the body 1. The chain invoice 11 is divided into page states by the sub-link rods 10. The needle sleeve 8 rotates synchronously with the first paper pulling ring 6 or the second paper pulling ring 7. The needle sleeve 8 clamps the chain invoice 11 with the first paper pulling ring 6 or the second paper pulling ring 7 (no auxiliary conveying tooth holes need to be opened on both sides of the chain invoice 11), and conveys the chain invoice 11. After the pin-type printing assembly 2 completes the printing of the chain invoice 11, the paper guiding roller 4 is used to separate the chain invoice 11, and the separated pages are discharged from each paper outlet window. The pin-type printing assembly 2 belongs to the prior art and will not be introduced in detail here.

[0041] Specifically, the plurality of paper outlet windows include a first window 27, a second window 28 and a third window 29. The second roller 21 and the third roller 22 are respectively arranged at the entrances of the first window 27 and the second window 28. A storage box 30 is inserted into the third window 29. A plurality of arc-shaped inner lining plates 31 are fixedly installed inside the body 1. The plurality of arc-shaped inner lining plates 31 are arranged in a circular array around the central roller 3, and a gap for conveying the chain invoice 11 is reserved between the outer surface of the arc-shaped inner lining plates 31 and the outer surface of the central roller 3.

[0042] As Figure 2 shown, taking the three-linked chain invoice 11 as an example, the chain invoice 11 is separated into three separated pages. The second roller 21 and the third roller 22 respectively adsorb the first-layer and second-layer separated pages and guide them into the first window 27 and the second window 28. The topmost separated page is discharged from the first window 27, the middle-layer separated page is discharged from the second window 28, and the third-layer separated page is discharged into the storage box 30 through the third window 29.

[0043] In this embodiment, both the first paper pulling ring 6 and the second paper pulling ring 7 are two. The two first paper pulling rings 6 and the second paper pulling rings 7 are respectively arranged in the groove at both ends of the central roller 3. Needle sleeves 8 and drive sleeves 17 are arranged at both ends of the paper pulling roller 5. The outer circumferential surfaces of the first paper pulling ring 6 and the second paper pulling ring 7 both have a rubber layer, and the surface of the rubber layer is flush with the outer circumferential surface of the central roller 3. The two needle tips 14 can respectively penetrate into the rubber layer of the first paper pulling ring 6 and the second paper pulling ring 7.

[0044] By arranging a driven rotating needle sleeve 8 on the surface of the paper pulling roller 5, the needle sleeve 8 presses the chain invoice 11 against the surfaces of the first paper pulling ring 6 and the second paper pulling ring 7. Its needle tip 14 can penetrate through the chain invoice 11 and penetrate into the surface of the first paper pulling ring 6 or the second paper pulling ring 7. Since the chain invoice 11 is separated before printing, the invoice pages of each layer are prone to deviation. The needle tips 14 on the surface of the needle sleeve 8 have the functions of tensioning the invoice paper and stapling it to prevent deviation. It should be emphasized that, as Figure 10 shown in Figure B in When the movable plate 13 flips, the movement trajectory of the needle tip 14 is arc-shaped outward. The needle tip 14 pulls the chain invoice 11 to both sides to avoid its wrinkles and realizes the function of tensioning the invoice paper.

[0045] Regarding its working principle, it should be noted that, taking the Figure 2 perspective as an example, the two needle sleeves 8 on the upper paper feed roller 5 are in the state shown in Figure 10 Figure A, and the two needle sleeves 8 on the lower paper feed roller 5 are in the state shown in Figure 10 Figure B. As shown in Figure 11 Figure C, when the first paper feed ring 6 is stationary or rotates downward and the second paper feed ring 7 rotates upward, the speed difference between the first paper feed ring 6 and the second paper feed ring 7 can be utilized to separate the connected invoices at the cutting line, that is, to realize the output of single invoices;

[0046] In addition, referring to Figure 11 Figure D, the left needle sleeve 8 on the upper paper feed roller 5 and the second paper feed ring 7 clamp the chain invoice 11 (its right needle sleeve 8 is separated from the chain invoice 11, that is, in the state shown by the movable plate 13 in Figure 9 ), and the right needle sleeve 8 on the lower paper feed roller 5 and the first paper feed ring 6 clamp the chain invoice 11 (its left needle sleeve 8 is separated from the chain invoice 11, that is, in the state shown by the movable plate 13 in Figure 9 ). When the first paper feed ring 6 rotates downward and the second paper feed ring 7 rotates upward, the chain invoice 11 can be driven to rotate clockwise by a certain angle. Similarly, when the first paper feed ring 6 rotates upward and the second paper feed ring 7 rotates downward, the chain invoice 11 can be driven to rotate counterclockwise by a certain angle. The needle-type printing assembly 2 includes a needle-type print head that moves left and right along the track. An image sensor is installed on the surface of the needle-type print head. The image sensor can detect and judge the rotation angle and displacement distance of the moving chain invoice 11, so as to achieve the effect of adjusting the transmission angle of the chain invoice 11.

[0047] The present invention designs two paper feed rollers 5, and needle sleeves 8 are provided at both ends of the two paper feed rollers 5. The swing of its movable plate 13 can make different needle heads 14 pierce the surfaces of the first paper feed ring 6 and the second paper feed ring 7 respectively. It can not only utilize the speed difference between the first paper feed ring 6 and the second paper feed ring 7 to separate the connected invoices, but also adjust the angle of the chain invoice 11 by the forward and reverse rotation of the first paper feed ring 6 and the second paper feed ring 7, so as to achieve the effect of correcting the position of the invoice paper, solve the problem of the offset of the text printing position, and improve the printing quality.

[0048] The invoice terminal management and printing device divides the chain invoice 11 into separate parts before printing by respectively arranging a paper feed roller 5, a paper guiding roller 4 around the central roller 3, and a separating link 10 on the lower side, then performs combined printing, and finally separates and outputs. The transmission of the invoice paper is more reliable, and the function of automatic separation is realized, so that the stub copy can be stored separately, and the other copies are taken away by the printer, meeting the use requirements of the self-service printing terminal.

[0049] The present invention realizes a printing method of separate - combined - separate printing again, which reduces the difficulty of separating after printing. Especially when printing a single invoice, after the blank chain - type invoice 11 is input and printed, the single invoice is separated by using the rotational speed difference between the first paper - feeding ring 6 and the second paper - feeding ring 7. The single invoice can be separately output with different separated pages at the second roller 21 and the third roller 22, thus achieving the effect of printing a single invoice and outputting different separated pages, and solving the problem that when printing a single invoice, its output requires backing up blank paper, which is prone to wrinkling and deviation.

[0050] The above - mentioned is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes should be covered within the protection scope of the present invention.

Claims

1. An invoice terminal management and printing device, comprising a body, wherein a pin-matrix printing assembly is arranged inside the body, and characterized in that: A central drum, a plurality of paper feed rollers and two paper pulling rollers are rotatably mounted inside the machine body, a first paper pulling ring and a second paper pulling ring are rotatably mounted on the surface of the central drum, a pin-type printing assembly is arranged in the area formed between the two paper pulling rollers, and a pin sleeve is arranged on the surface of the paper pulling roller; Two gear transmission shafts are installed for rotation inside the machine body, and multiple drive motors are fixedly installed inside the machine body. The multiple drive motors respectively drive the central drum, multiple paper guide rollers and two gear transmission shafts to rotate. The two gear transmission shafts respectively drive the first paper guide ring and the second paper guide ring to rotate. The needle sleeve pierces the surface of the first paper guide ring and the second paper guide ring, so that the needle sleeve rotates together with the first paper guide ring and the second paper guide ring. The needle sleeve comprises a sleeve body, a plurality of sheet grooves arranged in a ring array are provided on the surface of the sleeve body, a movable plate is rotatably installed in each sheet groove, two needles are fixedly installed on the surface of the movable plate, a connecting ball is fixedly installed on the inner side of the movable plate, a magnetic ring is slidably installed inside the sleeve body, a connecting groove is provided on the surface of the magnetic ring, and the connecting ball extends into the connecting groove; The end rotating sleeve of the paper pulling roller is provided with a driving sleeve, which is fixedly connected to the inner wall of the machine body, and an electromagnetic coil is embedded inside the driving sleeve. Two sections of reset springs are arranged inside the sleeve body, and the two sections of reset springs are respectively pressed against the two ends of the magnetic ring; There are two first paper pulling rings and two second paper pulling rings, which are respectively arranged in the grooves at both ends of the central roller, and needle sleeves and driving sleeves are arranged at both ends of the paper pulling roller. The outer circumferences of the first paper pulling ring and the second paper pulling ring are both provided with beef tendon layers, and the surface of the beef tendon layer is flush with the outer circumference of the central roller, and two needles can be inserted into the beef tendon layers of the first paper pulling ring and the second paper pulling ring respectively; There are multiple branch rods fixedly installed inside the machine body, and multiple paper output windows are opened on the surface of the machine body. The chain invoice is divided into paging states by the branch rods, and the needle sleeve rotates synchronously with the first paper pulling ring or the second paper pulling ring to transport the chain invoice. After the pin-type printing component completes printing on the chain invoice, it uses the paper guide roller to separate the chain invoice and discharge the separated pages from each paper output window.

2. The invoice terminal management and printing device according to claim 1, characterized in that: The plurality of paper guiding rollers include a first roller, a second roller and a third roller, and the plurality of driving motors include a first servo motor, a second servo motor and two third servo motors.

3. The invoice terminal management and printing device according to claim 2, characterized in that: The rotating end of the first servo motor is fixedly connected to the end of the first roller, and the ends of the first roller, the second roller and the third roller are fixedly installed with synchronous wheels. The three synchronous wheels are driven by synchronous belts. The rotating end of the second servo motor is fixedly connected to the end of the center roller, and the rotating ends of the two third servo motors are respectively fixedly connected to the ends of the two gear transmission shafts. The outer circumferential surfaces of the first paper pulling ring and the second paper pulling ring are both provided with tooth grooves, and the surfaces of the two gear transmission shafts are both provided with gears. The two gear transmission shafts are respectively driven by the meshing transmission of the gears and the tooth grooves to drive the first paper pulling ring and the second paper pulling ring to rotate independently.

4. The invoice terminal management and printing device according to claim 3, characterized in that: The surfaces of the second roller and the third roller are provided with air holes, and the ends of the second roller and the third roller are connected with negative pressure air pipes through rotating joints, and the negative pressure air pipes are connected with the air holes through air passages inside the second roller and the third roller.

5. The invoice terminal management and printing device according to claim 4, characterized in that: The multiple paper output windows include a first window, a second window and a third window. The second roller and the third roller are respectively arranged at the entrances of the first window and the second window. A storage box is inserted in the third window.

6. The invoice terminal management and printing device according to claim 5, characterized in that: A plurality of arc-shaped inner lining plates are fixedly installed inside the machine body, and the plurality of arc-shaped inner lining plates are arranged in a ring array around the central drum, and a gap for conveying chain invoices is reserved between the outer surface of the central drum and the inner lining plates.

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