KR101747962B1 - Gravure printing device capable of duplex printing - Google Patents

Abstract

The present invention relates to a gravure printing apparatus capable of double-sided printing, comprising a supply module for supplying a printing sheet from a supply roll wound with a printing sheet, at least one first reversing roller for reversing the traveling direction of the printing sheet supplied from the supply module One reverse printing module for reversing the proceeding direction of the one-side printing paper via the one-side printing module, a second reversing roller for reversing the traveling direction of the one-side printing paper via the one-side printing module, A second reversing guide portion including a first reversing guide portion for reversing the printing paper fed from the first reversing guide portion, a second reversing guide portion for reversing the printing paper fed from the second reversing guide portion, A two-sided printable gravure printing apparatus including a recovery module to provide. According to the present invention, the printing paper can be printed on both sides at once, shortening the manufacturing time, reducing the force, and supplying the printing paper to be printed on both sides or across the first reversing guide portion and the second reversing guide portion, It is possible to solve the problem of shrinkage, expansion and deviations, and it is possible to use the existing transfer roller as it is, thereby facilitating cost reduction and maintenance management.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a gravure printing apparatus,

The present invention relates to a two-sided printable gravure printing apparatus. More particularly, the present invention relates to a gravure printing apparatus capable of duplex printing capable of duplex printing.

Gravure printing is a printing method designed to continuously print a print sheet continuously moved by a roller. In gravure printing, a plurality of modules for printing respective colors are placed on a moving guide line, and each color is printed by passing the printing paper through the printing module. In a gravure printing apparatus capable of general double-sided printing, the plurality of printing modules described above must be organically driven with one power source as one. Therefore, although the above-described method is used for printing one side of the printing paper, a problem arises when the other side is required to be printed. In detail, in order to print one side and the other side of the printing paper together, there is a cost and technical problem of separately ordering a transfer roller provided in the printing module. In addition, the conversion module, which is required to be switched from the one-side transfer to the other side transfer, is bulky and has a problem of generating a large introduction cost. In addition, it is inevitable to purchase a dedicated transfer roller for the supplier who installed the conversion module. Prior Art Document [0002] Korean Patent No. 10-1454269 relates to a pattern printing apparatus and a printing method thereof. In the case of the preceding document, one side can be printed through the gravure printing method. However, there is a problem in that printing on the other side is not possible and a separate printing sheet switching module must be additionally provided for printing on the other side.

Korean Registered Patent No. 10-1454269 (Registration date: October 17, 2014)

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and it is an object of the present invention to provide a gravure printing method and a printing method capable of printing on both sides, It is an object to provide a device.

According to an aspect of the present invention, there is provided a printing apparatus comprising: a first reversing guide portion including a supply module for supplying a printing sheet from a supply roll wound with a printing sheet, and at least one first reversing roller for reversing the traveling direction of the printing sheet supplied from the supply module; A one-sided printing module that prints a predetermined color on one side of the printing paper that is inversely supplied from the one reverse guide portion, a second reverse switch that includes one or more second reversing rollers that reverse the traveling direction of the printing paper printed on one side via the one- And a recovery module for recovering the printing paper on which duplex printing has been completed by way of the one or more other printing modules and the other printing module for receiving the printing paper fed in the reverse direction from the second reversing guide portion and printing a predetermined color on the other surface, A gravure printing apparatus capable of printing.

According to the present invention, gravure printing can be performed on both sides of a printing paper because the one-side printing module and the other side printing module are provided.

In addition, according to the present invention, since the printing paper is supplied in a one-side printing or a reverse printing through the first reversing guide portion and the second reversing guide portion, the printing paper can solve problems such as shrinkage, expansion and departure.

1 is a diagram illustrating a two-sided printing capable of a gravure printing apparatus according to an exemplary embodiment of the present invention.
2 is a view illustrating one-side printing of a two-sided printable gravure printing apparatus according to an embodiment of the present invention.
2 is a view illustrating one-side printing of a two-sided printable gravure printing apparatus according to an embodiment of the present invention.
FIG. 3 is a view illustrating an error checking module of a gravure printing apparatus capable of duplex printing according to another embodiment of the present invention.
FIG. 4 is a view showing that an error checking module of a two-sided printable gravure printing apparatus according to another embodiment of the present invention takes a mark.
5 and 6 are diagrams showing electrical connection relationships of the error checking module of the gravure printing apparatus capable of duplex printing according to another embodiment of the present invention.
FIG. 7 is a view showing a photographing area and a non-photographing area of the error checking module of a two-sided printable gravure printing apparatus according to another embodiment of the present invention.
FIG. 8 and FIG. 9 are views showing that the error checking module of the gravure printing apparatus capable of duplex printing according to another embodiment of the present invention takes a photographing region and a non-photographing region separately.
10 is a view showing distances between circumferential lengths of inspection rollers and marks formed on a printing paper in a two-sided printable gravure printing apparatus according to another embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Also, in order to clearly illustrate the present invention in the drawings, portions not related to the present invention are omitted, and the same or similar reference numerals denote the same or similar components.

The objects and effects of the present invention can be understood or clarified naturally by the following description, and the objects and effects of the present invention are not limited only by the following description.

The objects, features and advantages of the present invention will become more apparent from the following detailed description. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 and 2 are views showing a two-sided printable gravure printing apparatus according to an embodiment of the present invention. Referring to FIGS. 1 and 2, a gravure printing apparatus capable of duplex printing according to an embodiment of the present invention includes a supply module 100, a first reversing guide unit 200, a one-side printing module 300, A printing module 500, and a collection module 600. [0050] Hereinafter, each configuration will be described in detail with reference to the drawings.

Here, the printing paper 10 may be provided as a web including paper, film, and the like. Gravure printing is performed by a supply module 100 that starts from a supply roll wound in a roll form and feeds the printing paper 10 from a supply roll, A single-sided printing module 300 and a single-sided printing module 300, which print a predetermined color on one side of the printing paper 10 received inversely from the first inversion guide portion 200 and the second inversion guide portion 400, A second reversing guide portion 400 for reversing the traveling direction of the one-sided printing paper 10, and a printing paper 10 fed in reverse from the second reversing guide portion 400, The double-sided printing is completed by sequentially passing through the one or more second-side printing module 500 and the second-side printing module 500 to sequentially collect the printing paper 10 on which the double-side printing has been completed. Here, the movement of the printing paper 10 advances through a plurality of rollers positioned on the upper side of the printing paper 10, and the plurality of rollers are provided so as to have the same axial direction. The other elements of the plurality of rollers are generally used, and a detailed description thereof will be omitted. On the other hand, the cushion wound on the supply roll is defined as one surface in the outward direction (outer peripheral surface direction) and the other surface in the inner direction (central direction or inner peripheral surface direction). On the other hand, the single-sided printing module 300 and the single-sided printing module 500 may each include a curing portion for curing the printed ink. The curing portion may be provided with a curing portion for irradiating light such as UV, a curing portion for curing the ink by applying a predetermined heat to the ink, and various curing portions depending on the chemical properties of the ink.

The supply module 100 feeds the printing paper 10 from the supply roll on which the printing paper 10 is wound. Specifically, the supply module 100 includes a plurality of rollers and feeds the printing paper 10 from a supply roll on which the printing paper 10 is wound via a plurality of rollers. The feeding module 100 feeds the printing paper 10 from the feeding roll and feeds the printing paper 10 to the first reversing guide unit 200. Here, the number and positions of the plurality of rollers can be variously configured. The printing paper 10 is moved to the first reversing guide unit 200 through the feeding module 100. [

FIG. 2 is a view showing a first reversal guide part, a one-side printing module, and a second reversal guide part of a gravure printing apparatus capable of double-sided printing according to an embodiment of the present invention.

The first reversing guide unit 200 reverses the traveling direction of the printing paper 10 fed from the feeding module 100. In detail, the first reversing guide unit 200 includes at least one first reversing roller 210 for reversing the traveling direction of the printing paper 10 supplied from the supplying module 100. The first reversing roller 210 reverses the advancing direction of the printing paper 10. The first reversing roller 210 reverses the printing paper 10 supplied from the supply module 100 so as to be U-shaped in a "U" shape from the upper side to the lower side. Therefore, the printing paper 10 is reversed to the lower portion by moving the first reversing roller 210 and moved. Specifically, the first reversing roller 210 passes the printing paper 10 fed from the feeding module 100 in a shape wrapping the upper side of the one-side pressing roller 320, thereby reversing the advancing direction. The first reversing roller 210 moves between the one side pressing roller 320 and the one side transfer roller 310 by reversing the printing paper 10 supplied from the supplying module 100 at the upper side of the one side pressing roller. . Thus, the printing paper 10 is reversed through the first reversing roller 210, so that one side of the printing paper 10 positioned in the upper direction of the printing paper 10 is reversely moved in the downward direction. That is, the print paper 10 is reversed in the feeding direction by passing through the first reversing guide unit 200, and is moved to the one-side printing module 300. The number and position of the first reversing rollers 210 may be variously implemented within the scope of the first reversing guide unit 200 having the same axial direction. The printing paper 10 is reversed in its proceeding direction through the first reversing guide part 200 and moved to the one-side printing module 300. [

The one-sided printing module 300 prints a predetermined color on one side of the printing paper 10. In detail, the one-sided printing module 300 prints a predetermined color on one side of the printing paper 10 supplied from the first inversion guide unit 200. In more detail, the one-sided printing module 300 prints a predetermined color on one side of the printing paper 10 received in reverse from the first inversion guide portion 200. More specifically, the one-side printing module 300 receives the printing paper 10 whose one side has been moved downward by being inverted from the first inversion guide portion 200, and prints a predetermined color on one side. The one-sided printing module 300 includes a one-sided transfer roller 310 and a one-sided pressure roller 320. The one-side printing module 300 includes a one-side transfer roller 310 for printing one side of the printing paper 10 with ink and a one-side pressing roller 320 for passing the printing paper 10 between the one side transfer roller 310 do. The one-side transfer roller 310 and the one-side pressure roller 320 are provided so as to be in contact with each other, and are spaced apart from each other by a single-sided transfer roller 310 while being passed and passed through the printing paper 10. The single-sided transfer roller 310 may be provided with various single-sided transfer rollers 310 according to the chemical composition of the ink. The one side transfer roller 310 may be provided on the printing paper 10 as an embossed, engraved, or planar roller for ink printing. The one-side transfer roller 310 may further include an ink storage unit (not shown) for supplying ink to the one-side transfer roller 310 and a doctor blade for pushing the ink at a negative angle or emboss. The one-sided pressure roller 320 is positioned above the one-sided transfer roller 310 to allow the printing paper 10 to pass between the one-sided transfer roller. Accordingly, the printing paper 10, which is fed in the reverse direction and is located on one side in the downward direction, passes through the one-side transfer roller 310 and the one-side pressing roller 320 of the one-side printing module 300, And is printed on one side with the ink delivered by the ink. The printing paper 10 is moved to the second reversing guide part 400 through the one-side printing module 300. [

The second inversion guide unit 400 inverts the traveling direction of the printing paper 10 fed from the one-side printing module 300. In detail, the second reversing guide unit 400 includes at least one second reversing roller 410 for reversing the traveling direction of the printing paper 10 supplied from the one-sided printing module 300. The second reversing roller 410 reverses the advancing direction of the printing paper 10. The second reversing roller 410 inverts the printing paper 10 supplied from the one-sided printing module 300 so as to be U-shaped in the lower direction from the upper side to the lower side. Therefore, the printing paper 10 is reversed and moved to the lower portion by way of the second reversing roller 410. [ Specifically, the second reversing roller 410 passes the printing paper 10 supplied from the one-sided printing module 300 through the lower surface of the one-sided transfer roller 310 to reverse the direction of movement. More specifically, the second reversing roller 410 reverses the feeding direction of the printing paper 10 by reversing the printing paper 10 supplied from the one-sided printing module 300 at the lower portion of the one-sided transfer roller 310 . More specifically, the second reversing roller 410 reverses the feeding direction of the printing paper 10 reversed in the feeding direction through the first reversing guide unit 200, thereby reversing the feeding direction of the printing paper 10 And is reversed again in the feeding direction of the printing paper 10 fed by the feeding module 100. Thus, the printing paper 10 is reversed through the second reversing roller 410, so that one side of the printing paper 10 positioned in the lower direction of the printing paper 10 is reversed upward. That is, the printing paper 10 is reversed in the feeding direction by passing through the second reversing guide part 400, and is moved to the printing module 500 when the printing paper 10 is reversed. The number and positions of the second reversing rollers 410 may be variously implemented within the scope of the second reversing guide unit 400 having the same axial direction. The printing paper 10 is reversed in its proceeding direction through the second inversion guide part 400 and is transferred to the printing module 500. [

The printing module 500 prints a predetermined color on the other side of the printing paper 10. [ In addition, one or more printing modules 500 may be provided. When a plurality of printing modules 500 are provided on the other side, each of the other side printing modules 500 prints respective colors. In detail, the second surface printing module 500 prints a predetermined color on the other surface of the print paper 10 supplied from the second inversion guide portion 400. More specifically, the other-side printing module 500 prints a predetermined color on one side of the printing paper 10 received in reverse order from the second inversion guide part 400. More specifically, the single-sided printing module 300 is fed from the second reversing guide part 400 to move the other side downward (one side is moved upward) to receive the printing paper 10, The color of which is printed. The other printing module 500 includes a transfer roller 510 and another pressure roller 520 on the other side. The other printing module 500 includes a transfer roller 510 on the other side for printing the other side of the printing paper 10 with ink and a side pressure roller 520 for passing the printing paper 10 between the transfer roller 510 and the transfer roller 510 do. The transfer roller 510 and the other pressing roller 520 are provided so as to be in contact with each other so that the printing paper 10 passes through and passes through the transfer roller 510 while being printed on the other side by the transfer roller 510. The printing module 500 may be provided so as to be inverted from the one-side printing module 300. In detail, since the printing paper 10 printed on one side through the one-side printing module 300 is reversed again in the feeding direction through the second inversion guide part 400, the printing module 500 on the other side is rotated by the one- As shown in FIG. More specifically, the other surface transfer roller 510 can be rotated in a direction opposite to the one surface transfer roller 310. In addition, the other pressing roller 520 can be rotated in a direction opposite to the one-side transfer roller 310. More specifically, the other surface transfer roller 510 may be driven to be inverted with respect to the one surface transfer roller 310 in correspondence with the printing paper 10 to be reversely fed by the first inversion guide unit 200. The other pressing roller 520 may be driven to be reversed with respect to the one side pressing roller 320 corresponding to the printing paper 10 being reversely fed by the first reversing guide unit 200. In addition, the one-side printing module 300 and the other side printing module 500, which are reversely driven according to the characteristics of gravure printing, which are integrally driven through one driving unit, may be reversed and rotated through gears or the like. Specifically, the one-sided printing module 300 can be reversely driven through a power unit for driving the printing module 500 and a bevel gear or the like. At this time, it is preferable to drive other things such as the rotational speed except for the reverse driving in the same manner. On the other hand, the transfer roller 510 may be provided with various transfer rollers 510 according to the chemical composition of the ink. The transfer roller 510 may be provided on the printing paper 10 as an embossed, engraved, or planar roller for ink printing. The other surface of the transfer roller 510 may further include an ink reservoir (not shown) for supplying ink to the transfer roller 510 and a doctor blade for depressing the ink at an embossed or embossed position. On the other hand, the pressure roller 520 is positioned on the upper side of the transfer roller 510 to allow the printing paper 10 to pass between the transfer roller and the transfer roller. The other side of the printing paper 10 positioned opposite to the other side of the printing paper 10 is fed to the other side of the transfer roller 510 while passing between the other side transfer roller 510 of the printing module 500 and the other side of the pressure roller 520 And is printed on one side with the ink delivered by the ink. The printing paper 10 is moved to the collection module 600 through the printing module 500 on the other side or if another printing module 500 is installed on the other printing module 500,

The collection module 600 collects the printing paper 10 that has been transferred through the printing module 500 and winds the printing paper 10 with the collection roll. In detail, the recovery module 600 receives the printing paper 10 that has been printed on both sides through the printing module 500 and winds the printing paper 10 on the recovery roll. Here, the recovery module 600 may include a plurality of rollers, and the number and position of the plurality of rollers included in the recovery module 600 may be variously configured.

On the other hand, in the gravure printing, the printing paper 10 moving at a high speed is continuously printed at a high speed through the transfer roller, so that there is a problem that defects occur in all the printing paper 10 when a minute error occurs. Therefore, an inspection apparatus for judging whether or not the supply of the printing paper 10 performing gravure printing is normal is provided. In detail, a mark M or a photographing means for determining whether the supply state of the printing paper 10 is normal in gravure printing has conventionally been provided. However, in the case where a high-speed continuous printing is performed and gravure Printing has a problem in checking the supply status of the printing paper 10. [ In order to solve this problem, there is a problem that an expensive shooting spot ratio or an image analyzing device capable of shooting a mark M moving at a high speed is introduced. In order to solve the above-mentioned problems, the present invention provides an error checking module 700 that is relatively inexpensive in facility cost and can accurately measure an error

1, 3, and 4 are views showing an error checking module 700 of a gravure printing apparatus capable of duplex printing according to another embodiment of the present invention. The gravure printing apparatus capable of duplex printing according to another embodiment of the present invention may further include an error checking module 700 for checking the feeding state of the printing paper 10. [ In order to measure the error of the error checking module 700, a mark M may be formed on the printing paper 10 at predetermined intervals L1. In detail, in order to measure the error, the printing paper 10 may be formed with a mark M at a predetermined interval L1 along the longitudinal direction of the printing paper 10 on one side or the other side. More specifically, in order to measure an error, a mark M may be formed at a predetermined interval L1 along the longitudinal direction of the printing paper 10 at one edge of the printing paper 10 on one side or the other side. In the drawing, the mark M is formed in the other surface direction. That is, the print paper 10 may be formed with marks M at predetermined intervals L1 on the side surface in the one edge direction. On the other hand, the error checking module 700 may be located between the supplying module 100 and the collecting module 600. At least one error checking module 700 may be provided between the supply module 100 and the collection module 600. The error checking module 700 may be any one of the various rollers described above.

In the error checking module 700, the error checking module 700 can determine whether the supply of the printing paper 10 is normal by comparing the position of the mark M of the photographed image with the previously stored reference mark. For this, the error checking module 700 may further include a controller for comparing the position of the reference mark stored in advance with the position of the mark M displayed on the photographed image, and determining the comparison. Here, the reference mark may be a reference mark previously stored in the control unit. In another example, the reference mark may be a reference mark previously formed in the transparent member.

The error checking module 700 may be provided with a pair of ancillary rollers 710 and an inspection roller 720. More specifically, the error checking module 700 is disposed between a pair of auxiliary rollers 710 and a pair of auxiliary rollers 710 which transfer the printing paper 10 and are spaced apart from each other by a predetermined distance, and a check roller 720 wound in a zigzag shape. The pair of auxiliary rollers 710 and the printing paper 10 wound in a staggered manner on the inspection roller are wound so as to abut one surface of the printing paper 10 with the outer peripheral surface of the inspection roller 720. Therefore, the marks M formed on the printing paper 10 are brought into contact with each other in the direction facing each other on the outer peripheral surface of the inspection roller 720.

The inspection roller 720 may include a viewing member 721 and a photographing unit 750. The inspection roller 720 may include a perspective member 721 capable of observing the inside from outside and a photographing unit 750 positioned inside the perspective member 721 and capable of photographing the outer peripheral surface of the perspective member 721 have. The viewing member 721 is positioned in the direction of one end of the inspection roller 720. The viewing member 721 can be positioned in the direction of one end in which the mark M is located on the inspection roller 720. [ The viewing member 721 may be made of a transparent material so that the viewing member 721 can observe the inside from outside. The sighting member 721 may be provided in a tubular shape. In addition, a predetermined space may be formed in the penetrating member 721. The photographing unit 750 may be provided in a predetermined space formed inside the viewing member 721. [ Therefore, the viewing member 721 is formed of a transparent material so that the inside of the viewing member 721 can observe the outside, and is provided in a tubular shape in which a predetermined space is formed therein. Since the viewing member 721 is positioned in the direction of one end of the inspection roller 720 on which the mark M is positioned, the mark M is positioned on the outer peripheral surface of the viewing member 721 and is wound and moved. The photographing unit 750 located inside the viewing member 721 is connected to the inspection roller 720 or the viewing member 721 and rotates together with the inspection roller 720. That is, the photographing unit 750 can photograph the mark M that is wound and conveyed in contact with the outer peripheral surface of the viewing member 721 by rotating together with the inspection roller 720. 10, the circumferential length L2 of the inspection roller 720 is equal to the predetermined spacing L1 between the marks M. In addition, as shown in FIG. Specifically, since the circumferential length L2 of the inspection roller 720 is equal to the predetermined spacing L1 between the marks M formed on the printing paper 10, one Only the mark M of the mark M can be located. Specifically, since the predetermined distance L1 between the circumferential length L2 of the inspection roller 720 and the mark M is the same length, when the inspection roller 720 rotates one turn (360 degrees) (M) is wound. More specifically, since the predetermined spacing L1 between the circumferential length L2 of the inspection roller 720 and the mark M is equally provided, the position coordinates of each mark M located on the inspection roller 720 Are always the same. Therefore, since the photographing unit 750 photographs the mark M and another next mark M is wound around the same position, the mark M can be photographed at the same coordinates. That is, since the photographing unit 750 is allowed to photograph the mark M for a time period during which the mark M is wound around the inspection roller 720, M) can be photographed more accurately.

The inspection roller 720 may further include a shaft portion 730 that rotates together with the inspection roller 720 and supplies power to the photographing portion 750 that photographs the mark M. [ In detail, the inspection roller 720 may be provided with a rod-like shaft portion 730 formed along the central axis of the inspection roller 720. More specifically, the inspection roller 720 may be provided with a rod-like shaft portion 730 formed along the center axis of the inspection roller 720 and rotating together with the inspection roller 720. 5 and 6, the shaft portion 730 includes a first conductive shaft 731 and a second conductive shaft 732 for supplying power (current) from the external power P to the photographing portion 750 can do. Specifically, the shaft portion 730 may include a first conductive shaft 731 and a second conductive shaft 732 that electrically connect the external power P and the photographing portion 750.

The first conductive shaft 731 is formed on the central axis of the shaft portion 730. The first conductive shaft 731 may be formed in a bar shape on the central axis of the shaft portion 730. The first conductive shaft 731 may be provided as a conductor to electrically connect the shaft portion 730 and the external power P to each other. The first conductive shaft 731 is formed in a bar shape and is formed on the central axis of the shaft portion 730. One end of the first conductive shaft 731 is electrically connected to the photographing unit 750 and the other end is electrically connected to the external power P. [ One end of the first conductive shaft 731 is electrically connected to the photographing unit 750 through a direct connection and the other end of the first conductive shaft 731 is electrically connected to the conductor And may be electrically connected to external power (P) through bearings or gears.

The second conductive shaft 732 may be formed to surround the first conductive shaft 731. The second conductive shaft 732 may have a tubular shape surrounding the first conductive shaft 731. The second conductive shaft 732 may be insulated from the first conductive shaft 731. The second conductive shaft 732 may have one end electrically connected to the photographing unit 750. The other end of the second conductive shaft 732 may be electrically connected to the external power P. [ The second conductive shaft 732 is insulated from the first conductive shaft 731 and has a tubular shape so as to surround the first conductive shaft 731. One end of the second conductive shaft 732 is electrically connected to the photographing unit 750, May be electrically or indirectly connected to the electric power (P). When the other end of the second conductive shaft 732 is indirectly connected to the external power P, the conductive roller 740 can be connected.

The conductive roller 740 is connected to the second conductive axis 732 and has one end connected to the external power P. The conductive roller 740 is provided in a roller shape and may be formed of a conductor. The conductive roller 740 may be provided so as to be in contact with the outer peripheral surface of the second conductive shaft 732 provided in a tubular form. The conductive roller 740 can rotate in contact with the outer peripheral surface of the second conductive shaft 732 provided in a tubular form. The conductive roller 740 is rotated along the outer circumferential surface of the second conductive shaft 732 rotating in contact with the outer circumferential surface of the second conductive shaft 732, and one end of the conductive roller 740 is electrically connected to the external power P. Therefore, the photographing unit 750 is electrically connected to the external power P through the second conductive shaft 732 and the conductive roller 740. [ The photographing unit 750 is connected to the photographing unit 750 through a second conductive shaft 732 having one end connected to the photographing unit 750 and a conductive roller 740 rotating along the outer peripheral surface of the second conductive shaft 732, As shown in FIG. Therefore, the photographing unit 750 can be electrically connected through the first conductive axis 731 and the second conductive axis 732, which are directly or indirectly connected to the external power P.

7, the photographing unit 750 can photograph the photographing region a and the non-photographing region b separately to photograph only the mark M located at the precise coordinates. More specifically, the inspection roller 720 can be divided into a photographing area a, which is a position where the printing paper 10 is wound and touched, and a non-photographing area b where the printing paper 10 is not wound, The unit 750 photographs the mark M only in the photographing area a and stops photography in the non-photographing area b. 7 to 9, the tubular second conductive shaft 732 supplies a current to the photographing unit 750 in the photographing area a and supplies current to the photographing unit 750 in the non-photographing area b. As shown in FIG. Specifically, the angle including the photographing area a and the angle including the non-photographing area b are obtained with respect to the central axis of the inspection roller 720, and the insulator 733 ). More specifically, the insulator 733 is formed on a predetermined circumferential surface of the second conductive shaft 732 having an angle corresponding to the non-imaging region (b). The insulator 733 is formed on the second conductive shaft 732 so that the second conductive shaft 732 does not supply current to the photographing unit 750 in the region including the non-photographing region b. Therefore, when the conductive roller 740 rotating along the outer peripheral surface of the second conductive shaft 732 is in contact with the insulator 733 formed so as to correspond to the non-imaging region b, the electrical connection is cut off, ) Stops shooting. Then, in the area corresponding to the photographing area a, the conductive roller 740 is electrically connected to the second conductive shaft 732, so that the photographing part 750 starts photographing again. In the present invention, when the supply of electric current is cut off, the photographing unit 750 transmits a predetermined signal to the photographing unit 750 by photographing the photographing region a and the non- And stopping the photographing.

Therefore, a two-sided printable gravure printing apparatus according to another embodiment of the present invention can solve the conventional incoherent mark (M) photographing. In detail, when the printing paper 10 to be transported at a high speed is photographed by the fixed photographing means, the problem that the mark M displayed on the photographed image is not correct can be solved.

It will be apparent to those skilled in the art that various modifications, additions and substitutions are possible, without departing from the spirit and scope of the invention as defined by the appended claims. Should be regarded as belonging to the above-mentioned patent claims.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventive concept as defined by the appended claims. But is not limited thereto.

In the above-described exemplary system, the methods are described on the basis of a flowchart as a series of steps or blocks, but the present invention is not limited to the order of the steps, and some steps may occur in different orders . It will also be understood by those skilled in the art that the steps shown in the flowchart are not exclusive and that other steps may be included or that one or more steps in the flowchart may be deleted without affecting the scope of the invention.

10: print paper 100: supply module
200: first reversing guide part 210: first reversing roller
300: one side printing module 310: one side transfer roller
320: one side pressure roller 400: second reverse guide part
410: second reversing roller 500: another printing module
510: Transfer roller on the other side 520: Pressure roller on the other side
600: recovery module 700: error checking module
710: Auxiliary roller 720: Inspection roller
721: perspective member 730:
731: first transmission shaft 732: second transmission shaft
733: Insulator 740: Conductive roller
750: photographing part P: external power
a: photographing area b: non-photographing area
M: Mark

Claims (10)

A supply module (100) for supplying the printing paper (10) from a supply roll on which the printing paper (10) is wound;
A first reversing guide part (200) including at least one first reversing roller (210) reversing the traveling direction of the printing paper (10) fed from the feeding module (100);
A one-sided printing module 300 that prints a predetermined color on one side of the printing paper 10 received in reverse from the first inversion guide unit 200;
A second reversing guide portion 400 including at least one second reversing roller 410 for reversing the traveling direction of the printing paper 10 printed on one side via the one-sided printing module 300;
One or more other side printing modules (500) for receiving the printing paper (10) received in reverse from the second inversion guide part (400) and printing a predetermined color on the other side; And
And a collection module (600) for collecting the printing paper (10) on which the double sided printing has been completed by passing through the other printing module (500)
The one side printing module 300 is driven to be inverted with the other side printing module 500 so as to correspond to the printing paper 10 being reversely supplied through the first inversion guide part 200,
The printing paper 10 has marks M formed at predetermined intervals L1 along the longitudinal direction on one edge of one side or the other side,
At least one error checking module 700 for photographing the mark M is provided between the supply module 100 and the collection module 600,
The error checking module 700 determines whether the supply of the printing paper 10 is normal by comparing the stored reference mark with the position of the mark M of the photographed image,
The error checking module (700)
A pair of auxiliary rollers 710 for feeding the printing paper 10 and spaced apart by a predetermined distance; And
The inspection roller 720 is disposed between the pair of the auxiliary rollers 710 and wound around the printing paper 10 in a zigzag shape so that its outer circumferential surface abuts one surface of the printing paper 10, Lt; / RTI >
The inspection roller (720)
A tubular through-beam member 721 is formed which is made of a transparent material whose one end direction in which the mark M is located can be observed from the inside to the outside,
A photographing unit 750 is provided in a predetermined space inside the see-through member 721,
The photographing unit 750 rotates together with the inspection roller 720 to photograph the mark M that is wound and conveyed in contact with the outer peripheral surface of the viewing member 721,
A rod-shaped shaft portion 730 formed along the center axis of the inspection roller 720 and rotating together with the inspection roller 720,
The shaft portion (730)
A first conductive shaft 731 formed on a central axis of the shaft portion 730 and having one end electrically connected to the photographing portion 750 and the other end electrically connected to external power P; And
A second conductive shaft 732 having a tubular shape to surround the first conductive shaft 731 and insulated from the first conductive shaft 731 and having one end electrically connected to the photographing unit 750;
And is connected to the outer peripheral surface of the second conductive shaft 732 so as to rotate along the circumferential surface of the second conductive shaft 732 and has one end electrically connected to the external electric power P, 732) and a conductive roller (740) for electrically connecting the external power (P) to each other.
The method according to claim 1,
The one-sided printing module (300)
A one-side transfer roller 310 for transferring ink to one side of the printing paper 10 to print a predetermined color on one side of the printing paper 10; And
And a one-side pressing roller 320 positioned above the one side transfer roller 310 and passing the printing paper 10 between the one side transfer roller 310 and the one side transfer roller 310,
The second printing module 500 includes:
A transfer roller (510) for transferring ink to the other side of the print paper (10) to print a predetermined color on the other side of the print paper (10) and rotate in a direction opposite to the one side transfer roller (310); And
A second pressure roller 520 positioned above the second transfer roller 510 and passing the print paper 10 between the second surface of the transfer roller 510 and rotating in the opposite direction to the first surface pressure roller 320, The gravure printing apparatus according to claim 1,
3. The method of claim 2,
The at least one first reversing roller (210)
The printing paper 10 supplied from the supply module 100 is passed through the one side pressing roller 320 so as to cover the upper side of the one side pressing roller 320,
The at least one second reversing roller (410)
Wherein the printing paper (10) supplied from the one-sided printing module (300) is passed through the lower surface of the one-sided transfer roller (310) so as to invert the proceeding direction.
delete delete delete The method according to claim 1,
The reference mark stored in advance is formed in the viewing member 721,
And the reference mark and the mark (M) are taken together by the photographing unit (750).
The method according to claim 1,
Wherein the circumferential length L2 of the inspection roller 720 is the same as the predetermined spacing L1 between the marks M. The two-
delete The method according to claim 1,
The inspection roller (720)
A photographing area (a) at which the printing paper (10) is wound in contact with the photographing area (10); And
Is divided into a non-photographing area (b) where the printing paper (10) is not wound,
An insulator 733 is formed on the second conductive axis 732 on a predetermined circumferential surface having an angle corresponding to the non-imaging region b,
When the photographing unit 750 is located in the non-photographing region b, the conductive roller 740 and the second conductive shaft 732 are insulated from each other due to the insulator 733. A gravure printing device capable of duplex printing.

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