CN218343118U

CN218343118U - Printing machine

Info

Publication number: CN218343118U
Application number: CN202221912933.4U
Authority: CN
Inventors: 刘文成
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-07-21
Filing date: 2022-07-21
Publication date: 2023-01-20
Anticipated expiration: 2032-07-21

Abstract

The embodiment of the application relates to printing device technical field, in particular to printing machine includes: a printing device; the printing device comprises a first printing assembly, a second printing assembly, a first transmission assembly and a second transmission assembly, wherein any transmission assembly comprises a roller and a paper biting mechanism arranged on the roller, and the axes of the rollers of the transmission assemblies are parallel to each other; the first printing assembly is arranged right opposite to the side face of the roller of the first transmission assembly, the second printing assembly is arranged right opposite to the side face of the roller of the second transmission assembly, the roller of the first transmission assembly is arranged close to the roller of the second transmission assembly, the first transmission assembly is used for transmitting paper printed by the first printing assembly to the second transmission assembly, and the rotating directions of the rollers of any two adjacent transmission assemblies are opposite. The printing machine that this application embodiment provided can make the printing machine when carrying out two-sided printing, improves the printing efficiency of printing machine.

Description

Printing machine

Technical Field

The embodiment of the application relates to the technical field of printing devices, in particular to a printing machine.

Background

When the existing double-sided printing machine is used for double-sided printing, most of the paper is conveyed to a blocking mechanism by a paper conveying roller after the first side of the paper is printed, the movement direction of the paper is changed by the blocking mechanism so that the paper is turned over and moved to another paper conveying roller, and then the second side of the paper is printed when the paper is conveyed by the other paper conveying roller, so that double-sided printing is completed.

The inventor of the application finds that: when the existing double-sided printing machine is used for double-sided printing, the movement direction of paper needs to be changed by using a blocking mechanism, so that the speed of the paper needs to be lower during movement, and the phenomenon that the paper is easy to turn over is avoided; the printing efficiency of the existing double-sided printing machine is low due to the fact that the speed of the paper in motion is low.

Therefore, it is desirable to provide a printing machine which can improve the printing efficiency of the printing machine when the printing machine performs duplex printing.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application aims to provide a printing machine, which can improve the printing efficiency of the printing machine when the printing machine performs double-sided printing.

In order to solve the above problem, an embodiment of the present application provides a printing press, including: a printing device; the printing device comprises a first printing assembly, a second printing assembly, a first transmission assembly and a second transmission assembly, wherein any transmission assembly comprises a roller and a paper biting mechanism arranged on the roller, and the axes of the rollers of the transmission assemblies are parallel to each other; the first printing assembly is arranged right opposite to the side face of the roller of the first transmission assembly and used for printing paper on the roller of the first transmission assembly, the second printing assembly is arranged right opposite to the side face of the roller of the second transmission assembly and used for printing paper on the roller of the second transmission assembly, the roller of the first transmission assembly is arranged close to the roller of the second transmission assembly, the first transmission assembly is used for transmitting the paper printed by the first printing assembly to the second transmission assembly, and the rotating directions of the rollers of any two adjacent transmission assemblies are opposite.

In the process of double-sided printing, when the roller of the first transmission assembly drives the paper to rotate, the first printing assembly which is arranged right opposite to the side face of the roller of the first transmission assembly and used for printing the paper on the roller of the first transmission assembly prints the first face of the paper; the rotating directions of the rollers of any two adjacent transmission assemblies are opposite, and the rollers of the first transmission assembly are arranged adjacent to the rollers of the second transmission assembly, so that the rotating direction of the rollers of the first transmission assembly is opposite to that of the rollers of the second transmission assembly; therefore, when the first transmission assembly transmits the paper printed by the first printing assembly to the second transmission assembly, the rotation direction of the roller of the first transmission assembly is opposite to that of the roller of the second transmission assembly, so that the exposed surface of the paper on the roller of the second transmission assembly is a second surface, and at the moment, the second surface of the paper printed by the second printing assembly can be arranged by the side surface of the roller right facing the second transmission assembly and used for printing the paper on the roller of the second transmission assembly, and then double-sided printing of the paper is completed.

So, at the in-process that carries out two-sided printing to the paper, only need use two cylinders (being the cylinder of first drive assembly and the cylinder of second drive assembly), and need not to use the direction of motion that stop gear changed the paper, thereby can make the speed of paper when the motion faster, and be difficult for producing and turn over the phenomenon, and then improve the printing efficiency of printing machine, simultaneously, because only need use two cylinders can accomplish the two-sided printing of paper, still can reduce the quantity of the cylinder that the printing machine required adopted, and then make the manufacturing cost reduction of printing machine. In addition, in the process that the roller of the transmission assembly drives the paper to move, the paper can be occluded by the paper occluding mechanism arranged on the roller, so that the paper is prevented from being separated from the roller.

In some embodiments, the first printing component and the second printing component are both inkjet printing components, and the first printing component and the second printing component each include a nozzle; the spray head of the first printing assembly is positioned above the first transmission assembly and is arranged towards the side surface of the roller of the first transmission assembly, and the spray head of the second printing assembly is positioned above the second transmission assembly and is arranged towards the side surface of the roller of the second transmission assembly; the roller of the first transmission assembly and the roller of the second transmission assembly are arranged in a staggered mode in the gravity direction.

In some embodiments, the first drive assembly is located diagonally above the second drive assembly; the diameter of any one of the roller of the first transmission assembly and the roller of the second transmission assembly is not less than 400mm.

In some embodiments, the printing apparatus further comprises: and the roller of the third transmission assembly is arranged adjacent to the roller of the second transmission assembly, and the third transmission assembly is used for receiving the paper fed out from the second transmission assembly and conveying the paper out of the printing device.

In some embodiments, the printer further comprises: the paper collecting device comprises a paper collecting piece, a first driving wheel and a second driving wheel, the paper collecting piece is wound on the first driving wheel and the second driving wheel, the first driving wheel is located obliquely above the second driving wheel, and the part of the paper collecting piece attached to the second driving wheel is arranged close to a roller of the third driving assembly and used for receiving paper sent out by the third driving assembly.

In some embodiments, the second drive wheel rotates in a direction opposite to the direction of rotation of the drum of the third drive assembly.

In some embodiments, the printer further comprises: the paper feeding device comprises a paper feeding belt and a paper storing mechanism, wherein one end of the paper feeding belt is adjacent to the paper storing mechanism, and the other end of the paper feeding belt is adjacent to the roller of the first transmission assembly.

In some embodiments, the paper storing mechanism is disposed opposite to the first driving wheel on both sides of the printing device in the horizontal direction.

In some embodiments, the paper-biting mechanism comprises: the mounting, the location axle and rotate the piece, the mounting is fixed in the side of cylinder, the location axle is fixed in the cylinder, and the axis of location axle is parallel with the axis of cylinder, mounting and location axle set gradually along the rotation direction of cylinder, rotate the both ends that the piece has relative setting, the one end of rotating the piece rotationally sets up on the location axle, the other end is located one side that the axis of cylinder was kept away from to the mounting.

In some embodiments, the paper-gripping mechanisms respectively disposed on any two adjacent rollers are disposed in a staggered manner in the axial direction of any one roller.

Drawings

FIG. 1 is a schematic diagram of a printing press according to some embodiments of the present disclosure;

fig. 2 is a partially enlarged view of a portion a in fig. 1.

Detailed Description

As can be seen from the background art, when performing duplex printing, most of the existing duplex printing machines utilize the paper-conveying roller to convey paper to the blocking mechanism after printing the first side of the paper, and then utilize the blocking mechanism to change the moving direction of the paper so as to turn over the paper and move the paper to another paper-conveying roller, and then print the second side of the paper when the other paper-conveying roller conveys the paper, thereby completing duplex printing.

The inventor of the present application found that: just because the existing double-sided printing machine needs to change the moving direction of the paper by using the blocking mechanism when carrying out double-sided printing, the speed of the paper during moving needs to be lower so as to avoid the phenomenon that the paper is easy to turn over; the printing efficiency of the existing double-sided printing machine is low due to the fact that the speed of the paper is low when the paper moves.

In order to improve the printing efficiency of a printing machine when the printing machine performs duplex printing, the inventor of the present application designs a printing machine including: a printing device; the printing device comprises a first printing assembly, a second printing assembly, a first transmission assembly and a second transmission assembly, wherein any transmission assembly comprises a roller and a paper biting mechanism arranged on the roller, and the axes of the rollers of the transmission assemblies are parallel to each other; the first printing assembly is arranged right opposite to the side face of the roller of the first transmission assembly and used for printing paper on the roller of the first transmission assembly, the second printing assembly is arranged right opposite to the side face of the roller of the second transmission assembly and used for printing paper on the roller of the second transmission assembly, the roller of the first transmission assembly is arranged close to the roller of the second transmission assembly, the first transmission assembly is used for transmitting the paper printed by the first printing assembly to the second transmission assembly, and the rotating directions of the rollers of any two adjacent transmission assemblies are opposite.

In the process of double-sided printing of the printing machine designed by the inventor of the application, when the roller of the first transmission assembly drives the paper to rotate, the first printing assembly which is arranged right opposite to the side face of the roller of the first transmission assembly and used for printing the paper on the roller of the first transmission assembly prints the first face of the paper; the rotating directions of the rollers of any two adjacent transmission assemblies are opposite, and the rollers of the first transmission assembly are arranged adjacent to the rollers of the second transmission assembly, so that the rotating direction of the rollers of the first transmission assembly is opposite to that of the rollers of the second transmission assembly; therefore, when the first transmission assembly transmits the paper printed by the first printing assembly to the second transmission assembly, just because the rotating direction of the roller of the first transmission assembly is opposite to that of the roller of the second transmission assembly, the exposed surface of the paper on the roller of the second transmission assembly is a second surface, and at the moment, the second printing assembly which is arranged right opposite to the side surface of the roller of the second transmission assembly and used for printing the paper on the roller of the second transmission assembly prints the second surface of the paper, so that double-sided printing of the paper is completed.

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the following describes each embodiment of the present application in detail with reference to the accompanying drawings. However, it will be appreciated by those of ordinary skill in the art that numerous technical details are set forth in various embodiments of the present application in order to provide a better understanding of the present application. However, the technical means claimed in the present application can be realized by various changes and modifications of the following embodiments.

Referring to fig. 1 and 2, some embodiments of the present application provide a printing press including: a printing device 100; the printing device 100 comprises a first printing assembly 110, a second printing assembly 120, a first transmission assembly 130 and a second transmission assembly 140, wherein each transmission assembly comprises a cylinder 101 and a paper biting mechanism 102 arranged on the cylinder 101, and the axes of the cylinders 101 of the transmission assemblies are parallel to each other; the first printing assembly 110 is arranged right opposite to the side surface of the cylinder of the first transmission assembly 130 and is used for printing paper on the cylinder 101 of the first transmission assembly 130, the second printing assembly 120 is arranged right opposite to the side surface of the cylinder 101 of the second transmission assembly 140 and is used for printing paper on the cylinder 101 of the second transmission assembly 140, the cylinder 101 of the first transmission assembly 130 is arranged adjacent to the cylinder 101 of the second transmission assembly 140, the first transmission assembly 130 is used for transmitting the paper printed by the first printing assembly 110 to the second transmission assembly 140, and the rotation directions of the cylinders 101 of any two adjacent transmission assemblies are opposite.

Any one of the transmission assemblies includes a cylinder 101 and a paper-nipping mechanism 102 disposed on the cylinder 101, that is, each transmission assembly has the cylinder 101 and the paper-nipping mechanism 102, that is, any one of the first transmission assembly 130 and the second transmission assembly 140 has the cylinder 101 and the paper-nipping mechanism 102.

Specifically, when the printing machine provided in the embodiment of the present application is used, when the cylinder 101 of the first transmission assembly 130 drives the paper to rotate, the first printing assembly 110 may print a first surface of the paper (the first surface is an exposed surface of the paper when the paper is located on the cylinder 101 of the first transmission assembly 130); when the first transmission assembly 130 transmits the paper printed by the first printing assembly 110 to the second transmission assembly 140, since the rotation direction of the cylinder 101 of the first transmission assembly 130 is opposite to the rotation direction of the cylinder 101 of the second transmission assembly 140, the exposed surface of the paper on the cylinder 101 of the second transmission assembly 140 is a second surface (the second surface is the other surface arranged opposite to the first surface of the paper), at this time, the second printing assembly 120 can print the second surface of the paper, and then the double-sided printing of the paper is completed.

More specifically, in any of the transmission assemblies, when the cylinder 101 receives the paper, the paper biting mechanism 102 bites the paper to ensure that the cylinder 101 can drive the paper to rotate when rotating; while the cylinder 101 transfers the paper to other components, the paper-gripping mechanism 102 releases the paper so that the paper can be released from the cylinder 101.

In one embodiment, after the cylinder 101 of the first transmission assembly 130 receives the sheet, the sheet biting mechanism 102 of the first transmission assembly 130 bites the front end of the sheet, so that the cylinder 101 of the first transmission assembly 130 can drive the sheet to rotate via the sheet biting mechanism 102 of the first transmission assembly 130; after the first printing assembly 110 prints the exposed surface of the paper on the first transmission assembly 130, when the roller 101 of the first transmission assembly 130 drives the front end of the paper to the position where the roller 101 of the second transmission assembly 140 is located, the paper biting mechanism 102 of the first transmission assembly 130 releases the front end of the paper, and the paper biting mechanism 102 of the second transmission assembly 140 bites the front end of the paper, so that the roller 101 of the second transmission assembly 140 can drive the paper to rotate via the paper biting mechanism 102 of the second transmission assembly 140, so that the second printing assembly 120 prints the exposed surface of the paper.

In the process, since the moving direction of the roller 101 of the first transmission assembly 130 is opposite to the moving direction of the roller 101 of the second transmission assembly 140, that is, the rotating directions of the rollers 101 of two adjacent transmission assemblies are opposite, after the paper biting mechanism 102 of the second transmission assembly 140 bites the front end of the paper, the roller 101 of the second transmission assembly 140 drives the paper to rotate, so that the paper cannot be folded.

In some embodiments, in either drive assembly, the side of the cylinder 101 is provided with a recess in which at least part of the paper-gripping mechanism 102 is located, thereby reducing the space occupied by the drive assembly.

In some embodiments, paper-biting mechanism 102 includes: the fixing part 103 is fixed on the side surface of the roller 101, the positioning shaft 104 is fixed on the roller 101, the axis of the positioning shaft 104 is parallel to the axis of the roller 101, the fixing part 103 and the positioning shaft 104 are sequentially arranged along the rotating direction of the roller 101, the rotating part 105 is provided with two ends which are oppositely arranged, one end of the rotating part 105 is rotatably arranged on the positioning shaft 104, and the other end of the rotating part 105 is positioned on one side of the fixing part 103, which is far away from the axis of the roller 101.

Thus, when the front end of the paper is located between one end of the rotating member 105 and the fixed member 103, the rotating member 105 can rotate to reduce the distance between one end of the rotating member 105 and the fixed member 103, and one end of the rotating member 105 and the fixed member 103 can clamp the front end of the paper together, so that the paper biting mechanism 102 bites the paper. When the paper biting mechanism 102 needs to release the paper, the rotating member 105 can rotate in the opposite direction to increase the distance between one end of the rotating member 105 and the fixed member 103, so as to release the front end of the paper.

In this embodiment, the fixing member 103 and the positioning shaft 104 can be disposed in a groove on the side of the roller 101 to reduce the space occupied by the transmission assembly.

In some embodiments, first printing assembly 110 and second printing assembly 120 are both inkjet printing assemblies, and first printing assembly 110 and second printing assembly 120 each include a jet; the spray head of the first printing assembly 110 is positioned above the first transmission assembly 130 and is arranged towards the side of the roller 101 of the first transmission assembly 130, and the spray head of the second printing assembly 120 is positioned above the second transmission assembly 140 and is arranged towards the side of the roller 101 of the second transmission assembly 140; the roller 101 of the first transmission assembly 130 and the roller 101 of the second transmission assembly 140 are arranged in a staggered manner in the gravity direction.

Specifically, when the first printing assembly 110 is a monochrome printing assembly, the number of the nozzles of the first printing assembly 110 is plural, and the plural nozzles are sequentially arranged along the axial direction of the cylinder 101 of the first transmission assembly 130, and the plural nozzles of the first printing assembly 110 are all located above the first transmission assembly 130 in the gravity direction, and at this time, the plural nozzles of the first printing assembly 110 can all be used for ejecting black pigment.

When the first printing assembly 110 is a multicolor printing assembly, the plurality of nozzles of the first printing assembly 110 are divided into a first type of nozzle, a second type of nozzle, a third type of nozzle and a fourth type of nozzle, the nozzles of the same type eject the same color, the nozzles of the same type are sequentially arranged along the axial direction of the roller 101 of the first transmission assembly 130, the first type of nozzle, the second type of nozzle, the third type of nozzle and the fourth type of nozzle are sequentially arranged along the circumferential direction of the roller 101 of the first transmission assembly 130, and the nozzles of the first printing assembly 110 are all located above the roller 101 of the first transmission assembly 130.

When the second printing assembly 120 is a monochrome printing assembly, the number of the nozzles of the second printing assembly 120 is plural, and the plural nozzles are sequentially arranged along the axial direction of the cylinder 101 of the second transmission assembly 140, and the plural nozzles of the second printing assembly 120 are all located above the second transmission assembly 140 in the gravity direction, and at this time, the plural nozzles of the second printing assembly 120 can all be used for ejecting black pigment.

When the second printing assembly 120 is a multi-color printing assembly, the plurality of nozzles of the second printing assembly 120 are divided into a first type of nozzle, a second type of nozzle, a third type of nozzle, and a fourth type of nozzle, the same type of nozzles eject the same color, the same type of nozzles are sequentially arranged along the axial direction of the cylinder 101 of the second transmission assembly 140, the first type of nozzle, the second type of nozzle, the third type of nozzle, and the fourth type of nozzle are sequentially arranged along the circumferential direction of the cylinder 101 of the second transmission assembly 140, and the plurality of nozzles of the second printing assembly 120 are all located above the cylinder 101 of the second transmission assembly 140.

In other embodiments, the first printing element 110 and the second printing element 120 may be other types of printing elements (e.g., laser printing elements, etc.), which is not limited in this application. Accordingly, when the first printing element 110 and the second printing element 120 are other types of printing elements, the positional relationship between the first printing element 110 and the first transmission element 130 may be changed accordingly, and the positional relationship between the second printing element 120 and the second transmission element 140 may also be changed accordingly, which is not limited in this application.

In some embodiments, the first transmission assembly 130 is located diagonally above the second transmission assembly 140. Further, neither the roller of the first transmission assembly 130 nor the roller of the second transmission assembly 140 has a diameter less than 400mm (mm: mm). As such, the cylinders of the first transmission assembly 130 and the second transmission assembly 140 may be conveniently disposed in a gravity direction offset manner, so as to facilitate the first printing assembly 110 and the second printing assembly 120 to be arranged in a gravity direction offset manner. In this way, it is also convenient to realize that the spray head of the first printing assembly 110 is located above the first transmission assembly 130 and is arranged towards the side of the roller 101 of the first transmission assembly 130, and the spray head of the second printing assembly 120 is located above the second transmission assembly 140 and is arranged towards the side of the roller 101 of the second transmission assembly 140.

In one example, the diameter of either of the rollers of the first transmission assembly 130 and the rollers of the second transmission assembly 140 is 350mm. In this way, it is ensured that no interference occurs between the first printing element 110 and the second printing element 120, and interference between the first printing element 110 and the second printing element 120 and any transmission element can be avoided.

In some embodiments, the printing device 100 further comprises: and a third driving assembly 150, wherein the roller 101 of the third driving assembly 150 is arranged adjacent to the roller 101 of the second driving assembly 140, and the third driving assembly 150 is used for receiving the paper sheet sent out from the second driving assembly 140 and sending the paper sheet out of the printing device 100.

In some embodiments, the diameter of the cylinder 101 of the third transmission assembly 150 is smaller than the diameter of the cylinder 101 of any one of the first transmission assembly 130 and the second transmission assembly 140, so that the diameter of the cylinder 101 of any one of the first transmission assembly 130 and the second transmission assembly 140 can be made larger to avoid interference between the first printing assembly 110 and the second printing assembly 120 and any transmission assembly, and the diameter of the cylinder 101 of the third transmission assembly 150 can be made smaller to reduce the size of the printing machine.

In some embodiments, the printer further comprises: the paper collecting device 200, the paper collecting device 200 includes a paper collecting member 210, a first driving wheel 220 and a second driving wheel 230, the paper collecting member 210 is wound on the first driving wheel 220 and the second driving wheel 230, the first driving wheel 220 is located obliquely above the second driving wheel 230, wherein a part of the paper collecting member 210 attached to the second driving wheel 230 is disposed adjacent to the roller 101 of the third driving assembly 150 and is used for receiving the paper sent out by the third driving assembly 150.

Specifically, the paper receiving member 210 is wound around the first driving wheel 220 and the second driving wheel 230, that is, the paper receiving member 210 is wound around the first driving wheel 220 and the second driving wheel 230, and the paper receiving member 210 is in transmission connection with any one of the first driving wheel 220 and the second driving wheel 230. In one example, the delivery unit 210 is a timing belt, and in this case, the first driving pulley 220 and the second driving pulley 230 are both pulleys. In another example, the delivery unit 210 is a chain, and the first driving wheel 220 and the second driving wheel 230 are both sprockets.

In some embodiments, the second transmission wheel 230 rotates in a direction opposite to the rotation direction of the drum 101 of the third transmission assembly 150. Thus, the paper folding of the delivery device 200 can be avoided.

In some embodiments, the printer further comprises: the paper feeding device 300, the paper feeding device 300 includes a paper feeding belt 310 and a paper storing mechanism 320, one end of the paper feeding belt 310 is adjacent to the paper storing mechanism 320, and the other end is adjacent to the roller 101 of the first transmission assembly 130. In this way, the paper stored in the paper storage mechanism 320 can be transferred to the roller 101 of the first transmission assembly 130 through the paper feeding belt 310.

In some embodiments, the paper storing mechanism 320 is disposed opposite to the first driving wheel 220 on both sides of the printing apparatus 100 in the horizontal direction. In this way, the sheets received by the sheet receiving device 200 and the sheets stored in the sheet storing mechanism 320 can be prevented from overlapping in the gravity direction, so as to reduce the size of the printing machine in the gravity direction.

In one embodiment, the paper path of the printing apparatus will be described with the paper storage 320 positioned on the left side of the printing apparatus 100 and the first driving roller 220 positioned on the right side of the printing apparatus 100.

Specifically, the paper feeding belt 310 drives the paper in the paper storage mechanism 320 to move to the right to the roller 101 of the first transmission assembly 130; the paper biting mechanism 102 of the first transmission assembly 130 bites the front end of the paper, the roller 101 of the first transmission assembly 130 drives the paper to rotate clockwise and transmits the paper to the second transmission assembly 140 after the first printing assembly 110 prints the paper; the paper biting mechanism 102 of the second transmission assembly 140 bites the front end of the paper, the roller 101 of the second transmission assembly 140 drives the paper to rotate counterclockwise and transmits the paper to the third transmission assembly 150 after the second printing assembly 120 prints the paper; the paper biting mechanism 102 of the third transmission assembly 150 bites the front end of the paper, and the roller 101 of the third transmission assembly 150 drives the paper to rotate clockwise and send the paper out of the printing device 100; the first driving wheel 220 and the second driving wheel 230 rotate counterclockwise to drive the sheet receiving member 210 to move, so that the sheet receiving member 210 can drive the sheet fed out by the roller 101 of the third driving assembly 150 to a predetermined position.

More specifically, since the first driving wheel 220 is located at the right side of the printing apparatus 100, the first driving wheel 220 and the second driving wheel 230 are required to rotate in the counterclockwise direction so as to facilitate the paper receiving unit 210 to receive paper, at this time, since the cylinder 101 of the third driving assembly 150 drives the paper to rotate in the clockwise direction and the second driving wheel 230 of the cylinder 101 adjacent to the third driving assembly 150 rotates in the counterclockwise direction, that is, the rotation directions of the cylinder 101 of the third driving assembly 150 and the second driving wheel 230 are opposite, the paper folding phenomenon of the paper receiving unit 210 can be avoided during paper receiving.

In some embodiments, the sheet-nipping mechanisms 102 respectively provided on any two adjacent cylinders 101 are disposed offset in the axial direction of any cylinder 101. In this way, when the two adjacent rollers 101 rotate, the interference of the paper nipping mechanisms 102 respectively disposed on any two adjacent rollers 101 can be avoided.

It will be understood by those of ordinary skill in the art that the foregoing embodiments are specific examples of implementations of the present application, and that various changes in form and details may be made therein without departing from the spirit and scope of the present application. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the application, and it is intended that the scope of the application be limited only by the claims appended hereto.

Claims

1. A printing press, comprising: a printing device;

the printing device comprises a first printing assembly, a second printing assembly, a first transmission assembly and a second transmission assembly, wherein any one of the transmission assemblies comprises a roller and a paper biting mechanism arranged on the roller, and the axes of the rollers of the transmission assemblies are parallel to each other;

the printing device comprises a first printing assembly, a second printing assembly, a first transmission assembly, a second transmission assembly and a second printing assembly, wherein the first printing assembly is arranged right opposite to the side face of a roller of the first transmission assembly and used for printing paper on the roller of the first transmission assembly, the second printing assembly is arranged right opposite to the side face of the roller of the second transmission assembly and used for printing paper on the roller of the second transmission assembly, the roller of the first transmission assembly is arranged close to the roller of the second transmission assembly, the first transmission assembly is used for transmitting the paper printed by the first printing assembly to the second transmission assembly, and the rotating directions of the rollers of any two adjacent transmission assemblies are opposite.

2. The printer of claim 1, wherein the first printing assembly and the second printing assembly are each inkjet printing assemblies, the first printing assembly and the second printing assembly each including a jet; the spray head of the first printing assembly is positioned above the first transmission assembly and arranged towards the side surface of the roller of the first transmission assembly, and the spray head of the second printing assembly is positioned above the second transmission assembly and arranged towards the side surface of the roller of the second transmission assembly; and the roller of the first transmission assembly and the roller of the second transmission assembly are arranged in a staggered manner in the gravity direction.

3. A printing press according to claim 1 or claim 2, wherein the first drive assembly is located obliquely above the second drive assembly; the diameter of any one of the roller of the first transmission assembly and the roller of the second transmission assembly is not less than 400mm.

4. The printing press of claim 1, wherein the printing device further comprises: a third drive assembly having a cylinder disposed adjacent the cylinder of the second drive assembly, the third drive assembly being configured to receive the sheet of paper fed from the second drive assembly and to transfer the sheet of paper out of the printing device.

5. The printing press of claim 4, further comprising: the paper collecting device comprises a paper collecting piece, a first driving wheel and a second driving wheel, the paper collecting piece is wound on the first driving wheel and the second driving wheel, the first driving wheel is located above the second driving wheel in an inclined mode, and the part, attached to the second driving wheel, of the paper collecting piece is close to a roller of the third driving assembly and used for receiving paper sent out by the third driving assembly.

6. A printing machine according to claim 5, wherein the second drive wheel rotates in a direction opposite to that of the cylinder of the third drive assembly.

7. The printing press of claim 5, further comprising: the paper feeding device comprises a paper feeding belt and a paper storage mechanism, wherein one end of the paper feeding belt is adjacent to the paper storage mechanism, and the other end of the paper feeding belt is adjacent to the roller of the first transmission assembly.

8. The printing press of claim 7, wherein the paper deposit mechanism is disposed on both sides of the printing unit in the horizontal direction opposite to the first driving wheel.

9. The printing press of claim 1, wherein the nip mechanism comprises: fixing part, location axle and rotation piece, the fixing part is fixed in the side of cylinder, the location axle is fixed in the cylinder, just the axis of location axle with the axis of cylinder is parallel, the fixing part and the location axle is followed the rotation direction of cylinder sets gradually, it has the both ends of relative setting to rotate the piece, the one end of rotating the piece rotationally sets up location epaxial, the other end is located the fixing part is kept away from one side of the axis of cylinder.

10. A printing machine according to claim 1, wherein said sheet-engaging mechanisms respectively provided on any two adjacent cylinders are arranged offset in the axial direction of any one of said cylinders.