CN219076867U

CN219076867U - Front and back printing device

Info

Publication number: CN219076867U
Application number: CN202223286608.4U
Authority: CN
Inventors: 曲海东; 叶志涛
Original assignee: Shenzhen Hongbo Intelligent Digital Equipment Co ltd
Current assignee: Shenzhen Hongbo Intelligent Digital Equipment Co ltd
Priority date: 2022-12-07
Filing date: 2022-12-07
Publication date: 2023-05-26
Anticipated expiration: 2032-12-07

Abstract

The utility model discloses a front and back printing device, comprising: a first printing unit for printing one side of the paper while conveying the paper; the second printing assembly is positioned at the downstream of the first printing assembly, the second printing assembly conveys paper, the paper moves towards one side close to the first printing assembly and turns over under the drive of the second printing assembly, and the second printing assembly prints the turned over paper. The paper in the front and back printing device that this application provided is in the transmission in-process of second printing subassembly and is returned the paper feed, can avoid the whole overlength of machine. The paper is turned over in the process of reversing paper feeding, and then is printed, so that the disposable front and back printing can be realized, the printing efficiency can be improved, and the loss is reduced. And compare and use turn over the device to turn over the back to print to the paper in prior art, the positive and negative printing device that this application provided need not turning device, can simplify the structure of positive and negative printing device, reduces the manufacturing cost of machine.

Description

Front and back printing device

Technical Field

The embodiment of the utility model relates to the field of printing equipment, in particular to a front and back printing device.

Background

In the printing operation, there are products that need to print on the front and back sides of paper, and in the prior art, the front and back sides of paper are usually printed by two methods. The method comprises the following steps: after printing the front surface, rolling the paper, unreeling the paper again to allow the back surface to face upwards, and printing the back surface again. The second method is as follows: the printing equipment is internally provided with a turnover device, specifically, after the front surface is printed, the paper is turned over by the turnover device and then the back surface is printed.

The first method has low production efficiency and large material loss. The second method needs to add a turnover device, has a certain partition effect on the tension of paper, is unfavorable for overall tension control, and causes certain waste due to the fact that an overall machine is lengthened and a paper path is lengthened

Disclosure of Invention

The technical problem to be solved by the embodiment of the utility model is to provide a front and back printing device, and aims to solve the problem of poor using effect of front and back printing equipment in the prior art.

In order to solve the technical problems, the utility model adopts a technical scheme that: there is provided a front and back printing apparatus for printing a sheet of paper, comprising:

a first printing unit for printing one side of the paper while conveying the paper;

the second printing assembly is arranged on one side of the first printing assembly and located at the downstream of the first printing assembly, the second printing assembly conveys paper, the paper moves towards one side close to the first printing assembly and turns over under the driving of the second printing assembly, and the second printing assembly prints the turned over paper.

Optionally, the first printing component comprises a front traction power roller, a front traction press roller and a first printing module, the front traction power roller and the front traction press roller are adjacently arranged, and the paper passes through a gap between the front traction power roller and the front traction press roller to be tensioned;

the first printing module is arranged at the downstream of the front traction power roller and is used for printing one side of the paper.

Optionally, the first printing assembly further comprises a front tension roller and a front tension detector, the front tension roller being located downstream of the front traction power roller and upstream of the first printing module; the front tension detector is provided to the front tension roller to detect the tension of the sheet.

Optionally, the first printing assembly further comprises a front speed measuring roller and a front encoder, wherein the front speed measuring roller is arranged at the downstream of the front tension roller and is positioned at the upstream of the first printing module; the front encoder is connected with the front speed measuring roller to measure the conveying speed of the paper;

the first stoving case is located the low reaches of first printing module and is located the upper reaches of second printing module, and first stoving case is used for drying the one side of paper.

Optionally, the second printing component comprises a middle traction power roller, a middle traction press roller and a second printing module, the middle traction power roller and the middle traction press roller are adjacently arranged, and the paper passes through a gap between the middle traction power roller and the middle traction press roller to be tensioned;

the second printing module is arranged at the downstream of the middle traction power roller and is used for printing the other surface of the paper.

Optionally, the second printing assembly further comprises a middle tension roller and a middle tension detector, the middle tension roller being located downstream of the middle traction power roller and upstream of the second printing module; the medium tension detectors are provided at both ends of the medium tension roller in the axial direction to detect the tension of the sheet.

Optionally, the second printing assembly further comprises a middle speed measuring roller and a middle encoder, wherein the middle speed measuring roller is arranged at the downstream of the middle tension roller and is positioned at the upstream of the second printing module; the middle encoder is connected with the middle speed measuring roller to measure the conveying speed of the paper.

Optionally, the second printing assembly further comprises a second drying box, the second drying box is arranged at the downstream of the second printing module and close to the first printing assembly, and the second drying box is used for drying the other surface of the paper.

Optionally, the front and back printing device further comprises an input assembly, the input assembly comprises a front guide roller and a deviation rectifying piece, the deviation rectifying piece is arranged at the upstream of the first printing assembly, and the deviation rectifying piece is used for adjusting the direction of the paper so that the paper is output in a preset direction;

the leading paper roll is arranged at the upstream of the deviation correcting piece and is used for conveying paper to the deviation correcting piece.

Optionally, the front and back printing device further comprises an output assembly, the output assembly comprises a rear traction press roller, a rear traction power roller and a rear paper guide roller, the rear traction press roller is arranged at the downstream of the second printing assembly, the rear traction press roller and the rear traction power roller are adjacently arranged, and paper passes through a gap between the rear traction power roller and the rear traction press roller to be tensioned;

the rear paper guide roller is arranged at the downstream of the rear traction power roller and is used for outputting paper.

The embodiment of the utility model has the beneficial effects that: the recto-verso printing device of the present utility model comprises a first printing assembly and a second printing assembly, unlike the prior art. The first printing assembly is used for conveying paper and printing one surface of the paper. The second printing assembly is arranged on one side of the first printing assembly, and the second printing assembly is positioned at the downstream of the first printing assembly, namely, the first printing assembly conveys the paper on which one side is printed to the second printing assembly. The second printing assembly conveys paper, the paper moves towards one side of the first printing assembly under the driving of the second printing assembly, reverse paper feeding is achieved in the process, the paper is turned over in the process, and the second printing assembly prints the other side of the paper after turning over. The paper in the front and back printing device that this application provided is in the transmission in-process of second printing subassembly and is returned the paper feed, can avoid the whole overlength of machine. The paper is turned over in the process of reversing paper feeding, and then is printed, so that the disposable front and back printing can be realized, the printing efficiency can be improved, and the loss is reduced. And compare and use turn over the device to turn over the back to print to the paper in prior art, the positive and negative printing device that this application provided need not turning device, can simplify the structure of positive and negative printing device, reduces the manufacturing cost of machine.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. Like elements or portions are generally identified by like reference numerals throughout the several figures. In the drawings, elements or portions thereof are not necessarily drawn to scale.

FIG. 1 is a perspective view of a front and back printing apparatus according to an embodiment of the present utility model;

fig. 2 is a cross-sectional view of a recto-verso printing device in accordance with an embodiment of the present utility model, wherein the arrows in the figure illustrate the path of movement of the sheet within the recto-verso printing device.

Reference numerals illustrate:

100. a front and back printing device; 1. a first printing assembly; 11. a front traction power roller; 12. front traction press roller; 13. a front tension roller; 14. a front speed measuring roller; 15. a first printing module; 16. a first drying box; 17. a front tension detector; 2. a second printing assembly; 21. a middle traction power roller; 22. middle traction press roller; 23. a medium tension roller; 24. a middle speed measuring roller; 25. a second printing module; 26. a second drying box; 27. a turn-over roller; 28. a medium tension detector; 3. an input assembly; 31. a leading roller; 32. a deviation correcting piece; 4. an output assembly; 41. a rear traction power roller; 42. a rear traction press roller; 43. a rear guide roller; 5. and a frame wallboard.

Detailed Description

In order that the utility model may be readily understood, a more particular description thereof will be rendered by reference to specific embodiments that are illustrated in the appended drawings. It will be understood that when an element is referred to as being "fixed" to another element, it can be directly on the other element or one or more intervening elements may be present therebetween. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or one or more intervening elements may be present therebetween. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used in this specification includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 and 2, the present utility model provides a front-back printing apparatus 100 for printing paper. The recto-verso printing device 100 comprises a first printing assembly 1 and a second printing assembly 2. The first printing unit 1 is used for conveying paper and printing one side (front or back) of the paper. The second printing unit 2 is disposed on one side of the first printing unit 1, and in this embodiment, the first printing unit 1 is disposed on the left side and the second printing unit 2 is disposed on the right side. The second printing unit 2 is located downstream of the first printing unit 1, i.e. the first printing unit 1 feeds the printed side of the paper to the second printing unit 2. The second printing component 2 conveys paper, the paper moves towards one side of the first printing component 1 under the drive of the second printing component 2, reverse paper feeding is achieved in the process, the whole machine is prevented from being overlong, and the length of a paper path is reduced. The paper is turned over in the process of returning the paper, and the second printing component 2 prints the other surface of the paper after the paper is turned over. The paper in the front and back printing device 100 is fed back in the transmission process of the second printing component 2, so that the paper is turned over and then printed, disposable front and back printing can be realized, the printing efficiency can be improved, and the loss is reduced. In addition, compared with the prior art that the paper is printed after being turned by using the turning device, the front and back printing device 100 provided by the application does not need a turning device, so that the structure of the front and back printing device 100 can be simplified, and the production cost of a machine can be reduced.

For ease of description, the relative positions of the components are described herein with reference to the coordinate system in fig. 2.

In the use process of the front and back printing device 100 provided by the application, the two sides of the paper can be printed according to the steps of printing the front side and printing the back side at one time in one printing process, and the two sides of the paper can also be printed according to the steps of printing the back side and printing the front side at first in one printing process.

Referring to fig. 2, in some embodiments, the sheet moves in a generally clockwise path in the first printing unit 1. The first printing assembly 1 comprises a front traction power roller 11, a front traction pressure roller 12 and a first printing module 15. The front traction power roller 11 and the front traction press roller 12 are both cylindrical. The front traction power roller 11 and the front traction press roller 12 are adjacently arranged, and a gap between the front traction power roller 11 and the front traction press roller 12 is used for paper to pass through. The paper passes through the gap between the front traction power roller 11 and the front traction press roller 12 to be tensioned, so that the paper sent to the first printing module 15 has better tension, the tension stability of the paper can be improved, and the printing quality can be improved. The sheet moves generally upward after passing through the front traction power roller 11.

The first printing module 15 is arranged downstream of the front traction power roller 11, and the first printing module 15 is used for printing one surface of the paper. In this embodiment, the first printing module 15 is a jet printing module for jet printing the front surface of the paper. The specific structure of the jet printing module can be referred to the related art.

Referring to fig. 2, in some embodiments, the first printing assembly 1 further comprises a front tension roller 13 and a front tension detector 17. The front tension roller 13 is cylindrical, the front tension roller 13 is located downstream of the front traction power roller 11 and upstream of the first printing module 15, and the front tension roller 13 is used to provide a mounting base for the front tension detector 17. The sheet becomes moved leftward after passing through the front tension roller 13.

The front tension detector 17 is provided to the front tension roller 13, specifically, the front tension detector 17 is provided to the surface of the front tension roller 13 and at both ends in the axial direction of the front tension roller 13, and the front tension detector 17 is used to detect the tension of the sheet to be printed. The front tension detector 17 may be a pressure sensor.

The recto-verso printing device 100 further comprises a printing system (not shown) for controlling the working state of the components. The front tension detector 17 feeds back the detected sheet tension data to the printing system.

Referring to fig. 2, in some embodiments, the first printing assembly 1 further includes a front tachometer roller 14 and a front encoder (not shown). The front tachometer roll 14 is cylindrical, and is arranged downstream of the front tension roll 13 and upstream of the first printing module 15. The front tachometer roll 14 is used to provide a mounting base for the front encoder. The sheet moves generally upward after passing through the front tachometer roller 14.

The front encoder is connected to the front tachometer roller 14 to measure the conveyance speed of the sheet. The pre-encoder feeds back the measured sheet transport speed to the printing system.

Referring to fig. 2, in some embodiments, the first printing assembly 1 further includes a first drying oven 16. The first drying box 16 is arranged at the downstream of the first printing module 15 and at the upstream of the second printing module 2, the first drying box 16 is vertically arranged, paper vertically passes through the first drying box 16 downwards, the first drying box 16 is used for drying one side of the paper, and in the embodiment, the first drying box 16 is used for drying the front side of the paper. After the paper passes through the first drying box 16, the printed side is dried, so that the ink can be prevented from being stained on other components in the subsequent process.

The first drying box 16 is located downstream of the first printing unit 1, and the paper sheet passes through the first drying box and then is located at the bottom of the front and rear printing apparatus 100, and enters the second printing unit 2. The sheet just entering the second printing unit 2 moves to the right.

Referring to fig. 2, in some embodiments, the direction of the motion track of the paper in the second printing assembly 2 is approximately anticlockwise, the output end of the second printing assembly 2 is close to the first printing assembly 1, that is, the position of the paper is gradually close to the first printing assembly 1 during the conveying process of the paper in the second printing assembly 2, so that the paper can be fed back, the space inside the front-back printing device 100 is fully utilized, and compared with a horizontally arranged machine, the whole machine is prevented from being lengthened, and the lower printing efficiency caused by too long paper path can be avoided.

The second printing assembly 2 comprises a middle traction power roller 21, a middle traction pressure roller 22 and a second printing module 25. The middle traction power roller 21 and the middle traction compression roller 22 are both cylindrical. The middle traction power roller 21 and the middle traction press roller 22 are adjacently arranged, a gap is reserved between the middle traction power roller 21 and the middle traction press roller 22, and paper passes through the gap between the middle traction power roller 21 and the middle traction press roller 22 to be tensioned, so that the paper is tensioned before being printed on the other surface, the paper sent to the second printing module 25 has better tension, the tension stability of the paper can be improved, and the printing quality can be improved. The sheet passes through the middle traction power roller 21 and moves vertically upward.

The second printing module 25 is arranged downstream of the middle traction power roller 21, and the second printing module 25 is used for printing the other surface of the paper. In this embodiment, the second printing module 25 is a jet printing module for jet printing the reverse side of the paper. The specific structure of the jet printing module can be referred to the related art.

Referring to fig. 2, in some embodiments, the second printing assembly 2 further includes a middle tension roller 23 and a middle tension detector 28. The middle tension roller 23 is cylindrical, the middle tension roller 23 is positioned downstream of the middle traction power roller 21 and upstream of the second printing module 25, and the middle tension roller 23 is used for providing a mounting base for the middle tension detector 28. The sheet becomes moved leftward after passing through the front tension roller 13.

Referring to fig. 2, in some embodiments, the second printing assembly 2 further includes a turn-over roller 27, where the turn-over roller 27 is cylindrical, and the turn-over roller 27 is disposed downstream of the middle traction power roller 21 and below the middle traction power roller 21, and the paper on which one side has been printed is in a vertically upward movement state after passing through the turn-over roller 27, and then passes through the middle tension roller 23, so that the turn-over is achieved.

The intermediate tension detector 28 is provided to the intermediate tension roller 23, specifically, the intermediate tension detector 28 is provided to the surface of the intermediate tension roller 23 at both ends in the axial direction of the intermediate tension roller 23, and the intermediate tension detector 28 is used to detect the tension of the sheet to be printed. The medium tension detector 28 may be a pressure sensor. The medium tension detector 28 feeds back the sensed sheet tension data to the printing system.

Referring to fig. 2, in some embodiments, the second printing assembly 2 further includes a mid-speed roller 24 and a mid-encoder (not shown). The middle speed measuring roller 24 is cylindrical, and the middle speed measuring roller 24 is arranged at the downstream of the middle tension roller 23 and at the upstream of the second printing module 25. The mid-speed roller 24 is used to provide a mounting base for the mid-encoder. The sheet moves approximately rightward after passing through the front tachometer roller 14.

The intermediate encoder is connected to the intermediate tachometer roller 24 to measure the conveyance speed of the sheet. The medium encoder feeds back the measured paper transport speed to the printing system.

Referring to fig. 2, in some embodiments, the second printing assembly 2 further includes a second drying oven 26. The second drying box 26 is disposed downstream of the second printing module 25 and close to the first printing unit 1, specifically, the second drying box 26 is close to the first drying box 16 of the first printing unit 1, so that the structure of the front and back printing device 100 is more compact, and the whole machine is prevented from being excessively long.

The second drying box 26 is vertically arranged, paper vertically passes through the second drying box 26 downwards, and the second drying box 26 is used for drying the other surface of the paper. In the present embodiment, the second drying oven 26 is used to dry the reverse side of the paper. After the paper passes through the second oven 26, the printed side is dried to prevent ink from being applied to other components during subsequent processing.

The second drying box 26 is located downstream of the second printing unit 2, and the paper sheet passes through the second drying box and is located at the bottom of the recto-verso printing apparatus 100. The sheet output from the second printing unit 2 moves upward.

Referring to fig. 2, in some embodiments, the recto-verso printing apparatus 100 further includes an input assembly 3, and the input assembly 3 includes a leader roller 31 and a deviation rectifying member 32. The deviation rectifying piece 32 is arranged at the upstream of the first printing component 1, and the deviation rectifying piece 32 is used for adjusting the direction of the paper so that the paper is output in a preset direction, wherein the preset direction refers to the direction meeting the requirements of a printing system. Thus, the sheet passes through the deviation correcting member 32 and enters the first printing unit 1.

The leading roller 31 is cylindrical, the leading roller 31 is provided upstream of the deviation rectifying member 32, and the leading roller 31 is used for conveying the sheet to the deviation rectifying member 32.

Referring to fig. 1 and 2, in some embodiments, the recto-verso printing apparatus 100 further includes an output assembly 4, the output assembly 4 including a rear traction roller 42, a rear traction power roller 41, and a rear guide roller 43. The rear traction press roller 42 and the rear traction power roller 41 have cylindrical shapes. The rear traction press roller 42 is arranged at the downstream of the second printing component 2, the rear traction press roller 42 and the rear traction power roller 41 are adjacently arranged, a gap is formed between the rear traction press roller 42 and the rear traction power roller 41, and paper passes through the gap between the rear traction power roller 41 and the rear traction press roller 42 to be tensioned, so that the paper with front and back printing is better in tension.

The rear guide roller 43 has a cylindrical shape, and the rear guide roller 43 is provided downstream of the rear traction power roller 41, and the rear guide roller 43 is used to output paper for winding.

Referring to fig. 1 and 2, in some embodiments, the front and back printing device 100 further includes a frame wall board 5, where the frame wall board 5 is plate-shaped, the frame wall board 5 is vertically disposed, two frame wall boards 5 are disposed at intervals, and a space between the two frame wall boards 5 is used to provide a mounting base for each of the first printing assembly 1, the second printing assembly 2, the input assembly 3 and the output assembly 4, and the first printing mold and the second printing mold are disposed above the frame wall board 5, and the first printing mold and the second printing mold are disposed at intervals.

In summary, the present utility model provides a front-back printing apparatus 100 for printing paper. The recto-verso printing device 100 comprises a first printing assembly 1 and a second printing assembly 2. The first printing unit 1 is used for conveying paper and printing one side of the paper. The second printing assembly 2 is arranged at one side of the first printing assembly 1, and the second printing assembly 2 is positioned at the downstream of the first printing assembly 1, namely, the first printing assembly 1 conveys the paper on which one side is printed to the second printing assembly 2. The second printing component 2 conveys paper, the paper moves towards one side of the first printing component 1 under the drive of the second printing component 2, reverse paper feeding is achieved in the process, the paper is turned over in the process, and the second printing component 2 prints the other side of the paper after turning over. The paper in the front and back printing device 100 provided by the application is fed back in the transmission process of the second printing assembly 2, so that the whole machine is prevented from being overlong. The paper is turned over in the process of reversing paper feeding, and then is printed, so that the disposable front and back printing can be realized, the printing efficiency can be improved, and the loss is reduced. In addition, compared with the prior art that the paper is printed after being turned by using the turning device, the front and back printing device 100 provided by the application does not need a turning device, so that the structure of the front and back printing device 100 can be simplified, and the production cost of a machine can be reduced.

It should be noted that the description of the present utility model and the accompanying drawings illustrate preferred embodiments of the present utility model, but the present utility model may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, which are not to be construed as additional limitations of the utility model, but are provided for a more thorough understanding of the present utility model. The above-described features are further combined with each other to form various embodiments not listed above, and are considered to be the scope of the present utility model described in the specification; further, modifications and variations of the present utility model may be apparent to those skilled in the art in light of the foregoing teachings, and all such modifications and variations are intended to be included within the scope of this utility model as defined in the appended claims.

Claims

1. A recto-verso printing device for printing paper, comprising:

a first printing unit configured to convey the sheet and print one side of the sheet;

2. The recto-verso printing device of claim 1 wherein the first printing assembly comprises a front traction power roller, a front traction pressure roller and a first printing module, the front traction power roller and the front traction pressure roller being disposed adjacent, the paper passing along a gap between the front traction power roller and the front traction pressure roller for tensioning;

3. The recto-verso printing device of claim 2 wherein the first printing assembly further comprises a front tension roller and a front tension detector, the front tension roller being downstream of the front traction power roller and upstream of the first printing module; the front tension detector is provided to the front tension roller to detect the tension of the sheet.

4. The recto-verso printing device of claim 3 wherein the first printing assembly further comprises a front tachometer roll, a front encoder and a first oven, the front tachometer roll being located downstream of the front tension roll and upstream of the first printing module; the front encoder is connected with the front speed measuring roller to measure the conveying speed of the paper;

the first drying box is arranged at the downstream of the first printing module and at the upstream of the second printing module, and is used for drying one side of the paper.

5. The recto-verso printing device of claim 1 wherein the second printing assembly comprises a mid-draw power roller, a mid-draw pressure roller and a second printing module, the mid-draw power roller and the mid-draw pressure roller being disposed adjacent one another, the paper passing along a gap between the mid-draw power roller and the mid-draw pressure roller for tensioning;

6. The recto-verso printing device of claim 5 wherein the second printing assembly further comprises a mid-tension roller and a mid-tension detector, the mid-tension roller being downstream of the mid-traction power roller and upstream of the second printing module; the middle tension detectors are arranged at two ends of the middle tension roller in the axial direction so as to detect the tension of the paper.

7. The recto-verso printing device of claim 6 wherein the second printing assembly further comprises a mid-speed roller and a mid-encoder, the mid-speed roller being positioned downstream of the mid-tension roller and upstream of the second printing module; the middle encoder is connected with the middle speed measuring roller to measure the conveying speed of the paper.

8. The recto-verso printing device of claim 7 wherein the second printing assembly further comprises a second drying box disposed downstream of the second printing module and adjacent to the first printing assembly, the second drying box being configured to dry the other side of the sheet.

9. The recto-verso printing device according to any one of claims 1 to 8, further comprising an input assembly comprising a leader roller and a deviation correcting member, said deviation correcting member being provided upstream of said first printing assembly, said deviation correcting member being adapted to adjust the direction of said sheet so that said sheet is output in a preset direction;

the front paper guide roller is arranged at the upstream of the deviation rectifying piece and is used for conveying the paper to the deviation rectifying piece.

10. The recto-verso printing device according to any one of claims 1 to 8, further comprising an output assembly comprising a rear traction press roll, a rear traction power roll and a rear guide roll, the rear traction press roll being provided downstream of the second printing assembly, the rear traction press roll and the rear traction power roll being provided adjacently, the sheet passing along a gap between the rear traction power roll and the rear traction press roll for tensioning;

the rear paper guide roller is arranged at the downstream of the rear traction power roller and is used for outputting the paper.