WO2014038425A1 - Printing machine and ink supply method - Google Patents

Abstract

In the printing machine and the ink supply method, improvement of printing quality is made possible by providing ink fountains (101a, 101b), ink fountain rollers (102a, 102b), ink delivery rollers (103a, 103b), ink distributing rollers (104a, 104b), ink vibrator rollers (105a, 105b), first and second form rollers of differing diameters (106a, 106b, 107a, 107b), plate cylinders (41a, 41b), blanket cylinders (31a, 31b), and dampening devices (61a, 61b) for supplying dampening solution to the ink distributing rollers (104a, 104b).

Description

Printing machine and ink supply method

The present invention relates to a printing machine and an ink supply method for performing printing by supplying ink and fountain solution to a plate cylinder using a plurality of rollers and transferring the ink onto a printing surface of a printing medium.

For example, a newspaper rotary offset printing press includes a paper feeding device, a printing device, a web pass device, a folder, and a paper discharge device. The printing apparatus includes a plurality of printing units. The printing unit includes, for example, an ink fountain, an ink base roller, an ink delivery roller, an ink kneading roller, an ink reciprocating roller, an ink kneading roller, an ink reciprocating roller, An inking roller, a plate cylinder, and a blanket cylinder are arranged substantially in series, and a dampening device is provided for the plate cylinder. Therefore, after the ink in the ink fountain is transferred to the ink transfer roller by the ink base roller and appropriately kneaded by the pair of ink kneading rollers and the ink reciprocating roller to form a thin film, the plate surface of the plate cylinder is transferred from each ink applying roller. The ink attached to the printing plate is transferred to the blanket cylinder, and the web travels between the opposite blanket cylinder so that a predetermined printing pressure is applied to the web and the ink on the blanket cylinder is transferred as a pattern. Is done.

By the way, this printing unit is configured by alternately arranging metal rollers and rubber rollers, and each metal roller is driven and rotated by a driving device, and the rubber roller contacting the metal roller is rotated. By doing so, all the rollers are rotating. Then, by rotating each roller, the ink is transferred from the ink base roller to a plurality of rollers and kneaded to form a uniform and appropriate ink film, which is transferred from the plate cylinder to the web via the blanket cylinder. Transcribed.

However, since the conventional printing unit has a large number of metal rollers and rubber rollers, the driving force for rotating each roller becomes large, requiring a large amount of power consumption and increasing the printing cost. Resulting in. In addition, rubber rollers require re-rolling of rubber due to long-term use, which increases running costs for a large number of rubber rollers and also increases maintenance costs.

In order to solve this problem, for example, a shortening inking device with a small number of rollers is disclosed in Patent Document 1 below. The shortened inking apparatus described in Patent Document 1 supplies ink from an ink transfer roller to a plate cylinder via two ink application rollers.

Japanese Patent No. 2977540 Japanese Patent Laid-Open No. 04-319443

By the way, the offset printing press has a printing plate (plate cylinder) whose surface is composed of an image portion that forms a pattern and a non-image portion that is a blank sheet, and an ink film that is oil is formed on the image area. Thus, a water film that repels oil is formed in the non-image area. Therefore, an ink supply device and a dampening device are arranged with respect to the plate cylinder. However, the above-described conventional shortening inking device is composed of an ink transfer roller and two ink-applying rollers. In this inking device, a dampening agent or a separating agent is supplied to the smoothing roller to repel it. An ink effect is provided, and a dampening device is not used. The structure is different and the structure is complicated.

Note that there is a printer described in Patent Document 2 as a printing machine in which an ink supply device and a dampening device are arranged with respect to a plate cylinder. The printing machine described in Patent Document 2 supplies ink from an ink transfer roller to a plate cylinder via an ink application drum and two foam rollers, and supplies dampening water from the dampening roller to the ink application drum. Is. In this case, the path from the dampening water supply position to the plate cylinder is short, and it becomes difficult to form a water film uniformly on the ink film, resulting in a decrease in print quality. Further, since the fountain solution is supplied to the surface of the ink film formed on the ink application drum, the plate cylinder is supplied with the ink film first from the ink application drum, so The boundary with the line portion becomes unstable, and there is a possibility that the print quality may be lowered in this respect.

The present invention solves the above-described problems, and an object of the present invention is to provide a printing machine and an ink supply method capable of improving printing quality.

In order to achieve the above object, a printing machine according to the present invention includes an ink supply source, an ink delivery roller to which ink is delivered from the ink supply source, an ink kneading roller in contact with the ink delivery roller, and the ink kneading roller. An ink reciprocating roller in contact with the roller, first and second ink application rollers having different diameters in contact with the ink reciprocating roller, a plate cylinder in contact with the first and second ink application rollers, and a plate cylinder And a dampening device that supplies dampening water to the ink kneading roller to which ink has been transferred from the ink transfer roller.

Therefore, by reducing the number of rollers and simplifying the drive transmission system, it is possible to reduce the rotational driving force of each roller and reduce power consumption, while reducing the number of rubber rollers to reduce running costs and maintenance costs. Can be reduced. In addition, if dampening water is supplied to the ink supply source side where the ink film thickness is large, the amount of dampening water that can be taken in by the ink increases, but the ink supply is hindered by the supplied dampening water, and ink transfer is prevented. It may get worse. For this reason, supplying dampening water to the ink kneading roller ensures an appropriate balance between the amount of ink dampened by the ink and the amount of ink supplied, and damps the ink supply path upstream. Water can be supplied while maintaining a good balance with the ink supply amount, and print quality can be improved.

In the printing machine of the present invention, the dampening device is downstream of the contact position with the ink delivery roller in the rotation direction of the ink kneading roller and upstream of the contact position with the ink reciprocating roller. It is characterized by supplying dampening water.

Therefore, the ink is supplied from the ink supply source to the plate cylinder via the ink delivery roller, the ink kneading roller, the ink reciprocating roller, and the two ink application rollers, and the fountain solution is supplied from the dampening device to the ink kneading roller. The ink is supplied to the plate cylinder via an ink reciprocating roller and two ink application rollers. Therefore, the plate cylinder is supplied with a water film first from each ink application roller, and then the ink film is easily supplied, the boundary between the image area and the non-image area is stabilized, and the printing quality is improved. Can do.

In the printing machine of the present invention, a drive device for driving and rotating the ink delivery roller, the plate cylinder, and the blanket cylinder is provided, and the ink kneading roller, the ink reciprocating roller, and the first and second ink application rollers are accompanied. It is characterized by being driven around.

Therefore, by arranging a rotating roller between the driven rollers, an appropriate slip is generated due to the rotation, and the ink kneading effect can be enhanced without increasing the number of rollers. Further, when the plate cylinder is separated from the ink application roller, the ink transfer roller can rotate the ink kneading roller, the ink reciprocating roller, and the respective ink application rollers.

In the printing machine of the present invention, a driving device for driving and rotating the ink reciprocating roller, the plate cylinder, and the blanket cylinder is provided, and the ink delivery roller, the ink kneading roller, and the first and second ink application rollers are accompanied. It is characterized by being driven around.

Therefore, by arranging a rotating roller between the driven rollers, an appropriate slip is generated due to the rotation, and the ink kneading effect can be enhanced without increasing the number of rollers. Further, when the plate cylinder is separated from the ink applying roller, the ink reciprocating roller can rotate the ink kneading roller, the ink delivery roller, and each ink applying roller.

In the printing machine of the present invention, the ink reciprocating roller provided downstream from the ink kneading roller and upstream from the first ink adhering roller is located downstream from the contact position with the ink kneading roller. In addition, a contact roller is provided that contacts the upstream side of the contact position with the first ink application roller.

Therefore, the number of nips can be increased when the contact roller comes in contact with the ink reciprocating roller, and the water mark trace can be eliminated by the dampening device and the pattern trace can be eliminated by the ink delivery roller, thereby improving the print quality. can do.

In the printing machine of the present invention, the contact roller has a rider roller.

Therefore, the ink kneading effect can be enhanced by the lidar roller.

In the printing machine according to the present invention, the dampening device has a chrome roller that is in contact with the ink kneading roller and whose main component of surface material is chrome.

Therefore, the chrome roller can supply water uniformly and stably to the ink kneading roller.

In the printing machine of the present invention, the first ink application roller is set to have the same diameter as the plate cylinder, the second ink application roller is set to be smaller in diameter than the plate cylinder, and along the axial direction. It is characterized by reciprocal movement.

Therefore, by setting the first ink application roller to the same diameter as the plate cylinder and the second ink application roller having a small diameter, the ink kneading effect can be enhanced, and the second ink application roller can be moved back and forth. By doing so, it is possible to effectively eliminate the history at the time of ink supply, suppress the occurrence of ghost, and improve the printing quality.

In the printing machine of the present invention, the ink delivery roller has an 11-polyamide film or a 12-polyamide film on the surface, and a plurality of angles along a direction inclined at a predetermined angle with respect to the axial direction on the surface of the polyamide film. A part is formed.

Therefore, by providing a polyamide film on the surface of the ink delivery roller, high lipophilicity on the surface can be secured, ink can be delivered well, and a plurality of inclined corners are formed on the surface of the polyamide film. Thus, a predetermined amount of ink can be supplied by scraping the ink at the plurality of corners.

In the printing machine of the present invention, a leveling roller that contacts the ink kneading roller is provided, and the dampening device supplies dampening water upstream from a position of the ink kneading roller that contacts the leveling roller. It is characterized by being possible.

Therefore, when the dampening device supplies dampening water to the ink kneading roller, the dampening water is transferred from the ink kneading roller to the leveling roller to form a water film, and the water film of the ink kneading roller is formed. The thickness is made uniform by leveling in the circumferential direction and the axial direction, and a stable water film can be supplied downstream.

In the printing press of the present invention, the dampening device is characterized in that dampening water can be supplied in a granular form to the ink kneading roller.

Therefore, even if the dampening device supplies granular dampening water to the ink kneading roller, the dampening water of the ink kneading roller is leveled by the leveling roller, and the thickness is made uniform on the downstream side. A water film can be supplied.

In the printing machine according to the present invention, at least one of the ink kneading roller and the leveling roller is capable of reciprocating along the axial direction.

Accordingly, when one of the ink kneading roller and the leveling roller reciprocally moves, slip occurs between the ink kneading roller and the leveling roller, and the dampening water supplied from the dampening device to the ink kneading roller is The water is smoothed between the ink kneading roller and the leveling roller, and a water film having a uniform thickness can be supplied to the downstream side.

In the printing press of the present invention, the leveling roller is a rubber roller.

Therefore, it becomes possible to reduce the weight of the roller and improve maintainability.

In the printing machine of the present invention, the leveling roller is a metal roller.

Therefore, the hydrophilicity of the roller surface can be secured and a stable water film can be formed, and the durability can be improved and the life can be extended.

In the ink supply method of the present invention, the step of supplying ink to the ink delivery roller to form an ink film on the surface, and the ink film of the ink delivery roller to the ink kneading roller to transfer the ink to the surface Forming a film, supplying a dampening water onto the ink film of the ink kneading roller to form a water film, and transferring the ink film and water film of the ink kneading roller to an ink reciprocating roller Forming a water film and an ink film on the surface, transferring the water film and the ink film of the ink reciprocating roller to first and second ink application rollers having different diameters, and forming an ink film and a water film on the surface; And a step of transferring the ink film and the water film of the first and second ink application rollers to a plate cylinder to form a water film and an ink film on the surface.

Therefore, since the ink supply path and the dampening water supply path are sufficiently secured, it is possible to form a uniform ink film and water film on the roller surface, thereby improving the printing quality.

According to the printing machine and the ink supply method of the present invention, the ink supply source, the ink delivery roller, the ink kneading roller, the ink reciprocating roller, the first and second ink application rollers having different diameters, the plate cylinder, the blanket cylinder, Since a dampening device that supplies dampening water to the ink kneading roller is provided, power consumption can be reduced, running costs and maintenance costs can be reduced, and ink can be dampened with dampening water. A delicate balance between the amount of ink that can be taken in and the amount of ink supplied can be secured appropriately, and dampening water can be supplied to the upstream side of the ink supply path while maintaining a good balance with the amount of ink supplied. Can be improved.

FIG. 1 is a schematic view showing a roller arrangement of a printing unit in a newspaper offset rotary printing press as a printing press according to Embodiment 1 of the present invention. FIG. 2 is a schematic diagram illustrating another roller arrangement of the printing unit in the newspaper offset rotary printing press according to the first embodiment. FIG. 3 is a cross-sectional view of the shaft portion of the ink reciprocating roller representing the swing mechanism in the printing unit of the first embodiment. FIG. 4 is a cross-sectional view of the eccentric shaft portion representing the swing mechanism in the printing unit of the first embodiment. FIG. 5 is a front view of the ink delivery roller. FIG. 6 is an explanatory diagram showing the outer peripheral shape of the ink delivery roller. FIG. 7 is an explanatory diagram illustrating a supply path of ink and dampening water in the printing unit. FIG. 8 is a schematic configuration diagram illustrating a newspaper offset rotary printing press according to the first embodiment. FIG. 9 is a schematic configuration diagram illustrating a printing unit in the newspaper offset rotary printing press according to the first embodiment. FIG. 10 is a schematic diagram showing a roller arrangement of a printing unit in a newspaper offset rotary printing press as a printing press according to Embodiment 2 of the present invention. FIG. 11 is a schematic diagram illustrating a roller arrangement of a printing unit in a newspaper offset rotary printing press as a printing press according to a third embodiment of the present invention. FIG. 12 is a schematic diagram showing a roller arrangement of a printing unit in a newspaper offset rotary printing press as a printing press according to Embodiment 4 of the present invention. FIG. 13 is a schematic diagram illustrating a roller arrangement of a printing unit in a newspaper offset rotary printing press as a printing press according to a fifth embodiment of the present invention. FIG. 14 is a schematic diagram showing a roller arrangement of a printing unit in a newspaper offset rotary printing press as a printing press according to Embodiment 6 of the present invention.

Hereinafter, preferred embodiments of a printing press and an ink supply method according to the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example, Moreover, when there exists multiple Example, what comprises combining each Example is also included.

1 is a schematic diagram showing a roller arrangement of a printing unit in a newspaper offset rotary printing press as a printing press according to Embodiment 1 of the present invention, and FIG. 2 is a printing unit in a newspaper offset rotary printing press according to Embodiment 1. FIG. 3 is a schematic view showing another roller arrangement, FIG. 3 is a cross-sectional view of a shaft portion of an ink reciprocating roller showing a swing mechanism in the printing unit of Embodiment 1, and FIG. 4 is a swing mechanism in the printing unit of Embodiment 1. FIG. 5 is a front view of the ink delivery roller, FIG. 6 is an explanatory view showing the outer peripheral shape of the ink delivery roller, and FIG. 7 is a supply path of ink and dampening water in the printing unit. FIG. 8 is a schematic configuration diagram illustrating a newspaper offset rotary printing press according to the first embodiment. FIG. 9 is a schematic configuration diagram illustrating a printing unit in the newspaper offset rotary printing press according to the first embodiment.

As shown in FIG. 8, the printing machine of the first embodiment is a newspaper offset rotary printing machine, and includes a paper feeding device R, an infeed device I, a printing device U, a web pass device D, and a folding machine. F. The paper feeding device R has a plurality (seven in the first embodiment) of paper feeding units R1 to R7, and the infeed device I has a plurality (seven in the first embodiment) of infeed units I1 to I7. The printing apparatus U has a plurality (six in the first embodiment) of printing units U1 to U6, and the web pass apparatus D has a plurality (two in the first embodiment) of web pass units D1. , D2 and the folding machine F has a plurality of (two in the first embodiment) folding units F1, F2.

In this case, the printing units U1 to U6 have been described as six units. However, each of the printing units U1 to U6 can perform four-color printing, and can be divided into upper and lower parts and can perform twelve two-color printing units U11 and U12. , U21... U61, U62. In addition, although the two folding units F1 and F2 are described above and below, actually, there are an operation side folding unit F1 and a driving side folding unit F2 that are arranged side by side in a direction orthogonal to the paper surface. Furthermore, although the printing apparatus U has been described from two parts, it has been described by dividing it into two in terms of function, and in reality, it is a single apparatus.

In the web offset press for newspapers according to the first embodiment, the paper feed units R1 to R7 are installed on the floor surface of the first floor of a building (not shown), and the infeed units I1 to I7 are installed on the second floor. The printing units U1 to U6 are installed on the third floor, the web pass device D is installed on the third to fifth floors, and the folding machine F is installed on the second and third floors.

In the paper feeding device R, the paper feeding units R1 to R7 have substantially the same configuration, and have a holding arm 11 that holds three webs on which a web (print medium) W is wound in a roll shape. By rotating 11, the web can be rotated to the paper feeding position. Each of the paper feeding units R1 to R7 is provided with a paper splicing device (not shown), and when the remaining web fed out at the paper feeding position becomes small, the paper splicing device uses the paper splicing device to feed the web at the paper feeding position. Thus, the web at the standby position can be spliced.

In the infeed apparatus I, the infeed units I1 to I7 have substantially the same configuration, and the web running on the printing apparatus U is adjusted by adjusting the tension of the web W fed to the printing units U1 to U6 of the printing apparatus U. The tension of W is stably maintained at an appropriate value. For example, each of the infeed units I1 to I7 has an infeed roller, a paper pressing rubber roller, a dancer roller, a guide roller, and the like. Then, the tension of the web W is made appropriate by urging the dancer roller in the tensioning direction of the web W, the peripheral speed of the infeed roller is changed according to the swing of the dancer roller, and the proper tension of the web W is maintained. ing.

The tension of the web W from the paper feeding device R to the infeed device I is performed by a brake device (not shown) provided in the paper feeding units R1 to R7, and the tension detection roller provided in the paper feeding device R is Based on the detection result, the brake device is controlled. A drag roller 12 that can be driven and rotated by a drive source is provided on the downstream side of the printing apparatus U, and the tension of the web W is adjusted by controlling the peripheral speed of the drag roller 12 and the biasing force of the dancer roller. ing.

In the printing apparatus U, the printing units U1 to U6 are multicolor printing units capable of performing double-sided four-color printing. However, the printing units U1 to U6 can be divided into upper and lower parts to be printing units U11 to U62 that can perform two-sided two-color printing. Each of the printing units U11 to U62 has substantially the same configuration and has an ink supply device, a plate cylinder, a blanket cylinder, and the like, which will be described later. In the first embodiment, each printing unit U1 to U3 has a blanket cylinder circumference (diameter) set to twice the circumference (diameter) of the plate cylinder, and each printing unit U4 to U6 has a plate cylinder circumference. The circumference (diameter) of the blanket and the circumference of the blanket cylinder (diameter) are set to be the same. In this case, each circumference (each diameter) of the blanket cylinder, the plate cylinder, and the blanket cylinder is set to be the same.

In the first embodiment, the printing units U1 to U6 are all configured by multi-color printing units. However, the present invention is not limited to this configuration. For example, various units such as a double-sided two-color printing unit, a double-sided single-color printing unit, a single-sided four-color printing unit or a single-color printing unit may be used in combination as appropriate according to the printed matter.

In the web pass device D, the web pass unit D1 is provided for the printing units U1 to U3, and the web pass unit D2 is provided for the printing units U4 to U6. Each of the web path units D1 and D2 has substantially the same configuration, and is a slitter that cuts the web W along the longitudinal direction (the longitudinal direction of the web W, the conveyance direction of the web W) at the center in the width direction, and the longitudinal cut. A turn bar for setting the transport path of the web W, and a compensator for adjusting the transport position of the web W in the vertical direction.

That is, the webs W printed by the printing units U1 to U3 are vertically cut by the slitter in the web pass unit D1, changed by the turn bar, changed by the turn bar, and adjusted by the compensator. Are overlaid in order. Each web W printed by the printing units U4 to U6 is vertically cut by the slitter in the web pass unit D2, the conveyance path is changed by the turn bar, and the conveyance position is adjusted by the compensator. They are stacked in order.

In the folding machine F, the two folding units F1, F2 are arranged on the operation side and the drive side. That is, when a plurality of webs W1 are overlapped and introduced from the web pass unit D1, the folding unit F1 vertically folds the web W1, cuts it horizontally by a predetermined length, and folds it to form a fold. The paper can be discharged as a newspaper. In addition, when a plurality of webs W2 are overlapped and introduced from the web pass unit D2, the folding unit F2 vertically folds the web W2, cuts the web W2 by a predetermined length, and then horizontally folds to form a fold. The paper can be discharged as a newspaper. In this case, in the folding machine F, the folding units F1 and F2 not only process the webs W1 and W2 from the web path units D1 and D2, but also one of the folding units F1 and F2 can process them together. .

Accordingly, in the web offset press for newspaper according to the first embodiment, the webs W respectively supplied from the paper feeding units R1 to R7 of the paper feeding device R are tensioned by the infeed units I1 to I7 of the infeed device I. Are adjusted and supplied to the printing units U1 to U6 of the printing apparatus U. Printing is performed on both sides of each web W by the printing units U1 to U6 in the printing apparatus U. Each of the webs W printed by the printing units U1 to U3 is vertically cut by a slitter in the web pass unit D1, changed by a turn bar, changed by a turn bar, and adjusted by a compensator. Are overlaid in order. Each web W printed by the printing units U4 to U6 is vertically cut by the slitter in the web pass unit D2, the conveyance path is changed by the turn bar, and the conveyance position is adjusted by the compensator. They are stacked in order.

Thereafter, in the folding machine F, when a plurality of webs W1 are overlapped and introduced from the web pass unit D1, the folding unit F1 vertically folds the web W1, cuts it horizontally at a predetermined length, and folds it horizontally. Form a compromise and eject it as a newspaper. In addition, when a plurality of webs W2 are overlapped and introduced from the web pass unit D2, the folding unit F2 vertically folds the web W2, cuts the web W2 by a predetermined length, and then horizontally folds to form a fold. The paper is discharged as a newspaper.

Here, the printing unit U1 in the printing apparatus U will be described in detail. As shown in FIG. 9, the printing unit U1 is an H-type tower unit so that four-color printing is possible. The printing unit U1 includes four stacks 21, 22, 23, black, black, cyan, yellow, and yellow along the conveyance direction of the web W (from bottom to top). 24 is arranged, and each of the stacks 21, 22, 23, and 24 has a roller arrangement that is symmetrical to each other.

That is, each of the stacks 21, 22, 23, and 24 in the printing unit U1 is opposed to the left and right so that the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, and 34b are in contact with each other across the web W conveyance path. The plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b are in contact with the blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b. The stacks 21, 22, 23, and 24 are respectively connected to the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, and 44b with ink supply devices 51a, 51b, 52a, 52b, 53a, 53b, 54a and 54b are provided. Further, dampening devices 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b are provided for the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b.

In this case, in the stacks 21 and 23, the blanket cylinders 31a, 31b, 33a and 33b and the plate cylinders 41a, 41b, 43a and 43b are arranged in a letter C shape, and the stacks 22 and 24 are in the blanket cylinders 32a, 32b and 34a. , 34b and plate cylinders 42a, 42b, 44a, 44b are arranged in an inverted C shape. In each plate cylinder 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b, a printing plate (not shown) that prints a different pattern on the outer peripheral surface is 2 in the axial direction, that is, in the width direction of the web W. Two (or four) can be mounted side by side. The number of plates attached may be set as appropriate.

In this case, since each of the stacks 21 and 23 and each of the stacks 22 and 24 has substantially the same roller arrangement, the stacks 21 and 22 will be described in detail below.

As shown in FIG. 1, the stack 21 in the printing unit U1 includes a pair of blanket cylinders 31a and 31b, a pair of plate cylinders 41a and 41b, a pair of ink supply apparatuses 51a and 51b, and a pair of dampening apparatuses 61a and 61a. 61b.

The ink supply devices 51a and 51b include ink fountains 101a and 101b and ink original rollers 102a and 102b, ink delivery rollers 103a and 103b, ink kneading rollers 104a and 104b, ink reciprocating rollers 105a and 105b, and a first ink application. It comprises rollers 106a and 106b and second ink application rollers 107a and 107b. Here, the ink supply source of the present invention includes ink fountains 101a and 101b and ink source rollers 102a and 102b.

The ink fountains 101a and 101b can store a predetermined amount of ink (oil-based ink), and adjust the ink supply amount to the ink base rollers 102a and 102b by adjusting the ink key opening degree with an ink key (not shown). be able to. The ink base rollers 102a and 102b are metal rollers that receive the ink supplied from the ink fountains 101a and 101b and deliver the ink to the ink delivery rollers 103a and 103b. The ink delivery rollers 103a and 103b are in contact with the ink kneading rollers 104a and 104b with a predetermined nip amount (nip pressure), and supply the received ink to the ink kneading rollers 104a and 104b.

As shown in FIG. 5, the ink delivery rollers 103a and 103b are metal rollers, and an 11-polyamide film or 12-polyamide film is provided on the surface, and the surface of the polyamide film is in the axial direction O. A twist roller is formed by forming a plurality of corner portions 111 along a direction inclined by a predetermined angle θ. In this case, the ink delivery rollers 103a and 103b are formed into a perfect circular cylinder by forming a polyamide film, and a plurality of corners 111 inclined by a predetermined angle θ are formed by cutting the surface. . That is, as shown in FIG. 6, a surface 112 having a perfect circle shape represented by a one-dot chain line is cut by a predetermined range L2 in the circumferential direction with a predetermined interval L1 to form a plane portion 113. Thus, the plane portions 113 and the arc portions 114 are alternately formed in the circumferential direction, and the corner portions 111 are formed between the plane portions 113 and the arc portions 114. At this time, by cutting the surface 112 along the direction inclined by the predetermined angle θ with respect to the axial direction O, a plurality of corner portions 111 along the direction inclined by the predetermined angle θ are formed.

Returning to FIG. 1, a predetermined gap is secured between the ink original rollers 102a and 102b and the ink delivery rollers 103a and 103b, and the ink original rollers 102a and 102b are rotated with respect to the rotation speed of the ink delivery rollers 103a and 103b. The rotation speed of 102b is set to a low speed. A plurality of corners 111 formed on the surfaces of the ink delivery rollers 103a and 103b come into contact with the ink films of the ink source rollers 102a and 102b to scrape the ink, so that the ink is removed from the ink source rollers 102a and 102b. The ink is supplied to the ink delivery rollers 103a and 103b.

The ink kneading rollers 104a and 104b supply ink received from the ink delivery rollers 103a and 103b to the ink reciprocating rollers 105a and 105b. In this case, the ink kneading rollers 104a and 104b are rubber rollers and have a smaller diameter than the ink delivery rollers 103a and 103b, and the ink reciprocating rollers 105a and 105b are metal rollers. The ink kneading rollers 104a and 104b are in contact with the ink reciprocating rollers 105a and 105b with a predetermined nip amount (nip pressure), kneading ink, and the two ink adhering rollers 106a that the ink reciprocating rollers 105a and 105b are in contact with. , 106b, 107a, 107b.

The first and second ink application rollers 106a, 106b, 107a, 107b supply the ink received by the ink reciprocating rollers 105a, 105b to the plate cylinders 41a, 41b. The plate cylinders 41a and 41b have a printing plate fixed on the surface thereof, and ink is supplied to the image line portion of the pattern to be printed on the printing plate. Each of the ink application rollers 106a, 106b, 107a, 107b is a rubber roller, and the first ink application rollers 106a, 106b have the same outer diameter (peripheral length) as the plate cylinders 41a, 41b. The inking rollers 107a and 107b have an outer diameter (peripheral length) smaller than that of the plate cylinders 41a and 41b.

In this case, the first ink adhering rollers 106a and 106b are in contact with the upstream side in the rotation direction of the ink reciprocating rollers 105a and 105b, and the second ink adhering rollers 107a and 107b are downstream in the rotation direction of the ink reciprocating rollers 105a and 105b. It is facing to the side. That is, the ink reciprocating rollers 105a and 105b supply ink in the order of the first ink applying rollers 106a and 106b and the second ink applying rollers 107a and 107b. The first ink application rollers 106a and 106b are in contact with the downstream side in the rotation direction of the plate cylinders 41a and 41b, and the second ink application rollers 107a and 107b are in contact with the upstream side in the rotation direction of the plate cylinders 41a and 41b. It touches. That is, the plate cylinders 41a and 41b are supplied with ink in the order of the second ink application rollers 107a and 107b and the first ink application rollers 106a and 106b.

The plate cylinders 41a and 41b transfer the ink supplied to the printing plate to the blanket cylinders 31a and 31b. The blanket cylinders 31a and 31b are opposed to the front and back of the web W conveyed to the contact position of both. Printing is performed by transferring ink.

Thus, in the stack 21, the ink base rollers 102a and 102b, the ink delivery rollers 103a and 103b, the ink kneading rollers 104a and 104b, and the ink reciprocating rollers 105a and 105b are in contact with each other in series. The plate cylinders 41a and 41b and the blanket cylinders 31a and 31b are in contact with each other in series. The two ink adhering rollers 106a, 106b, 107a, 107b are in contact with each other between the ink reciprocating rollers 105a, 105b and the plate cylinders 41a, 41b.

In this case, the blanket cylinders 31a and 31b are double cylinders with respect to the plate cylinders 41a and 41b, the first ink application rollers 106a and 106b have the same diameter as the plate cylinders 41a and 41b, and the second ink application rollers 107a. , 107b are smaller in diameter than the plate cylinders 41a, 41b and the first ink application rollers 106a, 106b, the outer diameter is not an integral multiple, and the two are out of phase. The ink kneading rollers 104a and 104b are formed to have a smaller diameter than the ink original rollers 102a and 102b, the ink delivery rollers 103a and 103b, and the ink application rollers 106a, 106b, 107a, and 107b. The diameter is not suitable.

In the first embodiment, the ink supply source is configured by the ink fountains 101a and 101b and the ink source rollers 102a and 102b. However, the present invention is not limited to this configuration. For example, instead of the ink fountains 101a and 101b, there is no pump system (for example, a digital ink pump) having an ink supply nozzle that directly supplies ink to the ink source rollers 102a and 102b, and there is no key for adjusting the ink amount. A keyless system that always forms an ink film with a constant thickness on the roller may be employed.

The dampening devices 61a and 61b have spray nozzles, and supply spraying dampening water directly to the ink kneading rollers 104a and 104b. In this case, the dampening devices 61a and 61b are located downstream of the contact position with the ink delivery rollers 103a and 103b in the rotation direction of the ink kneading rollers 104a and 104b, and the contact position with the ink reciprocating rollers 105a and 105b. Supply dampening water to the upstream side. The dampening water supplied from the dampening devices 61a and 61b to the ink kneading rollers 104a and 104b together with the ink is transferred to the plate cylinder 41a via the ink reciprocating rollers 105a and 105b and the ink applying rollers 106a, 106b, 107a and 107b. , 41b (press plate) is supplied to a non-printing area that is not printed.

In the first embodiment, the dampening devices 61a and 61b supply the dampening water directly to the ink kneading rollers 104a and 104b by the spray method. However, the present invention is not limited to this configuration. For example, the dampening devices 61a and 61b may be constituted by a water boat, a water source roller, a water kneading roller, a water reciprocating roller, a swimsuit roller, or the like.

Further, the ink delivery rollers 103a and 103b, the plate cylinders 41a and 41b, and the blanket cylinders 31a and 31b can be driven and rotated in synchronization by the first driving devices 121a and 121b. Ink kneading rollers 104a and 104b, ink reciprocating rollers 105a and 105b, and ink adhering rollers 106a, 106b, 107a, and 107b that directly or indirectly contact the ink delivery rollers 103a and 103b and the plate cylinders 41a and 41b, The first driving devices 121a and 121b can be driven and rotated by the driving force based on the first driving devices 121a and 121b. In other words, the first drive devices 121a and 121b decelerate the rotational force of the first drive motor (not shown) by the speed reducer and transmit it to the blanket cylinders 31a and 31b, and the plate cylinders 41a and 41b and the ink delivery via gears (not shown). It is transmitted to the rollers 103a and 103b and rotated in synchronization.

More specifically, the ink delivery rollers 103a and 103b, the ink kneading rollers 104a and 104b, the ink reciprocating rollers 105a and 105b, and the ink application rollers 106a, 106b, 107a, and 107b are arranged in series and in contact with each other. The rotational force transmitted from the blanket cylinders 31a and 31b to the plate cylinders 41a and 41b passes through the outer peripheral surface, and the ink adhering rollers 106a, 106b, 107a and 107b, the ink reciprocating rollers 105a and 105b, the ink kneading rollers 104a and 104b, By being transmitted to the ink delivery rollers 103a and 103b, these rollers can be rotated.

Further, the ink source rollers 102a and 102b can be driven and rotated by the second driving devices 122a and 122b. That is, the second driving devices 122a and 122b are rotated by reducing the rotational force of the second driving motor (not shown) by the speed reducer and transmitting it to the ink source rollers 102a and 102b.

Further, the ink reciprocating rollers 105a and 105b can be reciprocated in the axial direction by the swinging devices 131a and 131b. The second ink adhering rollers 107a and 107b can be reciprocated in the axial direction by the ink reciprocating rollers 105a and 105b. In this case, the oscillating devices 131a and 131b can reciprocate the ink reciprocating rollers 105a and 105b along the axial direction via a cam mechanism (not shown) by the rotational force of the plate cylinders 41a and 41b. The second ink adhering rollers 107a and 107b receive a swinging force from the ink reciprocating rollers 105a and 105b that contact the second ink adhering rollers 107a and 107b.

Hereinafter, the oscillating devices 131a and 131b will be described. Since both have substantially the same configuration, one of the oscillating devices 131a will be described in detail. In the swinging device 131a, as shown in FIGS. 3 and 4, the ink reciprocating roller 105a has a support shaft 201 supported by the drive side frame 202 so as to be rotatable by a bearing 203 and supported so as to be movable in the axial direction. Yes. A worm gear 204 is fixed to the support shaft 201. On the other hand, a moving frame 206 is supported on a guide shaft 205 fixed to the driving side frame 202 so as to be movable along the axial direction of the support shaft 201. The eccentric shaft 207 is disposed along a direction orthogonal to the support shaft 201, and a pair of shaft portions 208 are supported on the moving frame 206 by bearings 209. The worm wheel 210 is fixed to the eccentric shaft 207, and the worm wheel 210 meshes with the worm gear 204 of the support shaft 201. In this case, the support shaft 201 is rotatably supported by the moving frame 206 and is supported so as not to be relatively movable in the axial direction. The eccentric shaft 207 is set with a predetermined eccentricity amount e by the shaft center being displaced from the shaft center of the shaft portion 208.

Therefore, when the ink reciprocating roller 105a is rotated by the rotation and the support shaft 201 is rotated, this rotational force is transmitted to the worm wheel 210 by the worm gear 204, and the eccentric shaft 207 is rotated together with the shaft portion 208. At this time, since the shaft portion 208 is supported by the bearing 209 so as to be movable in the radial direction perpendicular to the support shaft 201 (left and right direction in FIG. 3) with respect to the moving frame 206, the eccentric shaft 207 in this direction is supported. Is absorbed, and the meshing between the worm gear 204 and the worm wheel 210 is maintained. On the other hand, since the shaft portion 208 is supported by the bearing 209 so as not to move in the axial direction of the support shaft 201 (vertical direction in FIGS. 3 and 4) with respect to the moving frame 206, the eccentric shaft 207 in this direction is supported. Is transmitted to the support shaft 201 through the moving frame 206, and the support shaft 201, that is, the ink reciprocating roller 105a is reciprocated along the axial direction while the meshing between the worm gear 204 and the worm wheel 210 is maintained. Moving.

The ink reciprocating rollers 105a and 105b and the second ink applying rollers 107a and 107b swing together with the peripheral surfaces because they contact each other and rotate together. The swinging devices 131a and 131b are not limited to this configuration. For example, the swinging force of the ink reciprocating rollers 105a and 105b may be transmitted to the second ink applying rollers 107a and 107b so as to reciprocate in the axial direction.

Further, as shown in FIG. 2, the stack 22 in the printing unit U1 includes a pair of blanket cylinders 32a and 32b, a pair of plate cylinders 42a and 42b, a pair of ink supply devices 52a and 52b, and a pair of dampening devices. 62a and 62b.

The ink supply devices 52a and 52b include ink fountains 161a and 161b and ink original rollers 162a and 162b, ink delivery rollers 163a and 163b, ink kneading rollers 164a and 164b, ink reciprocating rollers 165a and 165b, and a first ink deposit. It comprises rollers 166a and 166b and second ink application rollers 167a and 167b. Here, the ink supply source of the present invention includes ink fountains 161a and 161b and ink source rollers 162a and 162b. The dampening devices 62a and 62b have spray nozzles, and supply spraying dampening water directly to the ink kneading rollers 164a and 164b.

The ink delivery rollers 163a and 163b, the plate cylinders 42a and 42b, and the blanket cylinders 32a and 32b can be driven and rotated in synchronization by the first driving devices 171a and 171b. Ink kneading rollers 164a and 164b, ink reciprocating rollers 165a and 165b, and ink adhering rollers 166a, 166b, 167a and 167b that directly or indirectly contact the ink delivery rollers 163a and 163b and the plate cylinders 42a and 42b, The first driving devices 171a and 171b can be driven and rotated by a driving force based on the first driving devices 171a and 171b. That is, the first drive devices 171a and 171b decelerate the rotational force of the first drive motor (not shown) by the speed reducer and transmit it to the blanket cylinders 32a and 32b, and the plate cylinders 42a and 42b and the ink delivery via gears (not shown). It is transmitted to the rollers 163a and 163b and rotated in synchronization.

The ink base rollers 162a and 162b can be driven and rotated by the second driving devices 172a and 172b. That is, the second driving devices 172a and 172b are rotated by reducing the rotational force of the second driving motor (not shown) by the speed reducer and transmitting it to the ink source rollers 162a and 162b. The ink reciprocating rollers 165a and 165b can be reciprocated in the axial direction by the swinging devices 181a and 181b. The second ink adhering rollers 167a and 167b receive a swinging force from the ink reciprocating rollers 165a and 165b. It can be reciprocated by being connected in the axial direction.

The ink supply devices 52a and 52b and the dampening devices 62a and 62b constituting the stack 22 are different from the ink supply devices 51a and 51b and the dampening devices 61a and 61b constituting the stack 21 in the arrangement direction of the rollers. Since the configuration is substantially the same only by turning upside down, detailed description is omitted.

Hereinafter, the operation of the printing unit U1 will be described. As shown in FIG. 1, when the ink base rollers 102a and 102b rotate in the stack 21, a predetermined amount of black ink is taken out from the ink fountains 101a and 101b, and the ink kneading roller 104a is passed through the ink delivery rollers 103a and 103b. , 104b and from the ink kneading rollers 104a, 104b to the ink reciprocating rollers 105a, 105b. The dampening devices 61a and 61b supply dampening water directly to the ink kneading rollers 104a and 104b.

Then, since the ink reciprocating rollers 105a and 105b reciprocate in the axial direction with respect to the ink kneading rollers 104a and 104b, the ink and the fountain solution are uniformly spread in the axial direction, that is, the width direction of the web W. Ink is kneaded to a predetermined viscosity. Then, ink and dampening water formed to have a predetermined film thickness are supplied from the ink reciprocating rollers 105a and 105b to the first and second ink applying rollers 106a, 106b, 107a and 107b, and the ink applying rollers 106a and 106b. , 107a, 107b are supplied to the plate surfaces (image line portion and non-image line portion) of the plate cylinders 41a, 41b.

At this time, the ink source rollers 102a and 102b are driven and rotated by the second driving devices 122a and 122b, while the plate cylinders 41a and 41b are driven and rotated by the first driving devices 121a and 121b. The driving rotational force is transmitted to each of the ink applying rollers 106a, 106b, 107a, 107b, the ink reciprocating rollers 105a, 105b, the ink kneading rollers 104a, 104b, and the ink delivery rollers 103a, 103b, and each roller rotates. Therefore, an appropriate slip is likely to occur between the downstream side rollers from the plate cylinders 41a and 41b toward the ink delivery rollers 103a and 103b, so that an appropriate slip is likely to occur, and the ink kneading rollers 104a and 104b and the ink reciprocating roller 105a. 105b, the ink can be properly kneaded and adjusted to an optimum viscosity, and the ink reciprocating rollers 105a and 105b can be swung to uniformly adjust the ink film thickness.

The ink attached to the plate surfaces of the plate cylinders 41a and 41b is transferred to the blanket cylinders 31a and 31b, and a predetermined printing pressure is applied to the web W between the pair of blanket cylinders 31a and 31b. The ink on the blanket cylinders 31a and 31b is transferred as a pattern onto the surface of the web W, and double-sided printing is performed.

Next, as shown in FIG. 2, when the ink base rollers 162a and 162b rotate in the stack 22, a predetermined amount of indigo ink is taken out from the ink fountains 161a and 161b, and the ink passes through the ink delivery rollers 163a and 163b. The ink is transferred to the kneading rollers 164a and 164b, and is transferred from the ink kneading rollers 164a and 164b to the ink reciprocating rollers 165a and 165b. The dampening devices 62a and 62b supply dampening water directly to the ink kneading rollers 164a and 164b.

Then, since the ink reciprocating rollers 165a and 165b reciprocate in the axial direction with respect to the ink kneading rollers 164a and 164b, the ink and the fountain solution are uniformly spread in the axial direction, that is, the width direction of the web W, Ink is kneaded to a predetermined viscosity. The ink and dampening water formed to have a predetermined film thickness are supplied from the ink reciprocating rollers 165a and 165b to the first and second ink application rollers 166a, 166b, 167a and 167b, and the ink application rollers 166a and 166b. , 167a and 167b are supplied to the plate surfaces (image line portion and non-image line portion) of the plate cylinders 42a and 42b.

At this time, the ink source rollers 162a and 162b are driven and rotated by the second driving devices 172a and 172b, while the plate cylinders 42a and 42b are driven and rotated by the first driving devices 171a and 171b. The driving rotational force is transmitted to each of the ink applying rollers 166a, 166b, 167a, 167b, the ink reciprocating rollers 165a, 165b, the ink kneading rollers 164a, 164b, and the ink delivery rollers 163a, 163b. Therefore, an appropriate slip is more likely to occur between the rollers on the downstream side from the plate cylinders 42a and 42b toward the ink delivery rollers 163a and 163b, so that an appropriate slip easily occurs, and the ink kneading rollers 164a and 164b and the ink reciprocating roller 165a. 165b, the ink can be properly kneaded and adjusted to an optimum viscosity, and the ink reciprocating rollers 165a, 165b can be swung to uniformly adjust the ink film thickness.

The ink adhered to the plate surfaces of the plate cylinders 42a and 42b is transferred to the blanket cylinders 32a and 32b, and a predetermined printing pressure is applied to the web W between the pair of blanket cylinders 32a and 32b. The ink on the blanket cylinders 32a and 32b is transferred to the surface of the web W as a pattern, and duplex printing is performed.

Thereafter, similarly, printing with red ink is performed in the stack 23, and printing with yellow ink is performed in the stack 24.

Here, the supply relationship between the ink and the fountain solution in the printing unit U1 will be described with reference to FIG. 7. This FIG. 7 shows the flow of ink from the ink fountain 161a to the blanket cylinder 32a in the stack 22, The flow of dampening water from the dampening device 62a to the blanket cylinder 32a is schematically shown, and a gap is provided between each roller. The flow of ink from the ink fountain 161b to the blanket cylinder 32b and the flow of dampening water from the dampening device 62b to the blanket cylinder 32b will not be described but are basically the same. As shown in FIG. 7, the ink base roller 162a supplies the ink in the ink fountain 161a to the ink kneading roller 164a through the ink delivery roller 163a, and the dampening device 62a supplies the dampening water to the ink film on the ink kneading roller 164a. Supply to the surface. Then, the ink kneading roller 164a is transferred to the ink reciprocating roller 165a in a state where the water film represented by the dotted line is formed on the ink film represented by the solid line, and the ink reciprocating roller 165a forms the ink film on the water film. Received in the state, and supplied to the first and second ink application rollers 166a and 167a. Each of the ink application rollers 166a and 167a receives the ink film in a state where a water film is formed on the ink film, and supplies it to the plate surfaces of the plate cylinders 42a and 42b.

Therefore, the ink is supplied to the plate cylinder 42a through the ink source roller 162a, the ink delivery roller 163a, the ink kneading roller 164a, the ink reciprocating roller 165a, and the first and second ink application rollers 166a and 167a. In this case, although the ink supply path is shorter than the conventional one, since the second ink application roller 167a swings with a different diameter, a sufficient ink kneading effect can be ensured. Further, the fountain solution is supplied to the plate cylinder 42a via the ink kneading roller 164a, the ink reciprocating roller 165a, and the first and second ink application rollers 166a and 167a. In this case, since the dampening water can be appropriately supplied to the portion having a large ink film thickness without inhibiting the ink transfer, the ink can sufficiently take up the dampening water.

The ink kneading roller 164a is transferred to the ink reciprocating roller 165a in a state where a water film represented by a dotted line is formed on the ink film represented by a solid line, and the ink reciprocating roller 165a forms an ink film on the water film. Received in the state, and supplied to the first and second ink application rollers 166a and 167a. Each of the ink application rollers 166a and 167a receives the ink film in a state where a water film is formed on the ink film, and supplies it to the plate surface of the plate cylinder 42a. Therefore, the plate cylinder 42a is supplied with the ink film after the water film is supplied. That is, in the plate cylinder 42a, a water film (fountain solution) adheres to a non-image area that becomes a blank sheet, and then an ink film is supplied to the image area that forms the pattern. As a result, in the plate cylinder 42a, the adhesion of the ink film to the non-image area is suppressed, and the ink adheres appropriately to the image area, the boundary between the image area and the non-image area is stabilized, Print quality is good.

Thereafter, the plate cylinder 42a transfers the ink adhered to the image line portion to the blanket cylinder 32a, and the pair of blanket cylinders 32a transfers the ink to the web W, whereby a pattern is formed on the web W. In this case, the offset printing plate creates an oleophilic part (image area) and a hydrophilic area (non-image area), adds water to the hydrophilic area, and uses the repulsion of water and oil. Then, ink is applied to the oleophilic part to form the image area. Therefore, if ink is applied to the printing plate first, the ink will stick to the entire surface, not just the lipophilic part and hydrophilic part, and the image area and non-image area will be formed accurately. It becomes difficult.

As described above, in the newspaper offset rotary printing press of Example 1, the ink fountains 101a, 101b, 161a, 161b, the ink source rollers 102a, 102b, 162a, 162b, and the ink delivery rollers 103a, 103b, 163a, 163b, ink kneading rollers 104a, 104b, 164a, 164b, ink reciprocating rollers 105a, 105b, 165a, 165b, and first and second ink adhering rollers 106a, 106b, 107a, 107b, 166a, 166b having different diameters. 167a, 167b, plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b, blanket cylinders 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b, and ink kneading rollers 104a, 104b, Pair with 164a, 164b Dampening device 61a which Shi supplying water wet Te are provided 61b, 62a, 62b, 63a, 63b, 64a, and 64b.

Therefore, by reducing the number of rollers and simplifying the drive transmission system, it is possible to reduce the rotational driving force of each roller and reduce power consumption, while reducing the number of rubber rollers to reduce running costs and maintenance costs. Can be reduced. In addition, if dampening water is supplied to the ink supply source side where the ink film thickness is large, the amount of dampening water that can be taken in by the ink increases, but the ink supply is hindered by the supplied dampening water, and ink transfer is prevented. It may get worse. For this reason, by supplying dampening water to the ink kneading rollers 104a, 104b, 164a, 164b, a fine balance between the amount of ink that can be taken in by the ink and the amount of ink supplied can be appropriately secured. The dampening water can be supplied to the upstream side in the supply path while maintaining a good balance with the ink supply amount, and the print quality can be improved.

In the newspaper offset rotary printing press according to the first embodiment, the dampening devices 61a, 61b, 62a, 62b, 63a, 63b, 64a, and 64b are the ink delivery rollers 103a in the rotation direction of the ink kneading rollers 104a, 104b, 164a, and 164b. , 103b, 163a, 163b, dampening water is supplied downstream from the contact position and upstream from the contact position with the ink reciprocating rollers 105a, 105b, 165a, 165b.

Accordingly, the ink is the ink fountains 101a, 101b, 161a, 161b, the ink former rollers 102a, 102b, 162a, 162b, the ink delivery rollers 103a, 103b, 163a, 163b, the ink kneading rollers 104a, 104b, 164a, 164b, the ink reciprocation. Plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a via rollers 105a, 105b, 165a, 165b, first and second ink application rollers 106a, 106b, 107a, 107b, 166a, 166b, 167a, 167b 44b, and the dampening water is supplied from the dampening devices 61a, 61b, 62a, 62b, 63a, 63b, 64a, and 64b onto the ink film on the ink kneading rollers 104a, 104b, 164a, and 164b, and the ink reciprocating roller 105a. , 105 , 165a, 165b, and first and second ink application rollers 106a, 106b, 107a, 107b, 166a, 166b, 167a, 167b, and supplied to the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b Is done. Therefore, the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b are supplied with a water film first from the respective ink application rollers 106a, 106b, 107a, 107b, 166a, 166b, 167a, 167b. Thus, the ink film is supplied, the boundary between the image area and the non-image area is stabilized, and the print quality can be improved.

In the newspaper offset rotary printing press according to the first embodiment, the ink delivery rollers 103a, 103b, 163a, 163b, the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b and the blanket cylinders 31a, 31b, 32a, 32b. , 33a, 33b, 34a, 34b are provided with first drive devices 121a, 121b, 171a, 171b, ink kneading rollers 104a, 104b, 164a, 164b, ink reciprocating rollers 105a, 105b, 165a, 165b and The first and second ink adhering rollers 106a, 106b, 107a, 107b, 166a, 166b, 167a, 167b are driven together.

Therefore, by arranging a rotating roller between the driven rollers, an appropriate slip is generated due to the rotation, and the ink kneading effect can be enhanced without increasing the number of rollers. Further, when the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b are separated from the ink application rollers 106a, 106b, 107a, 107b, 166a, 166b, 167a, 167b, the ink delivery rollers 103a, 103b , 163a, 163b, the ink mixing rollers 104a, 104b, 164a, 164b, the ink reciprocating rollers 105a, 105b, 165a, 165b and the ink application rollers 106a, 106b, 107a, 107b, 166a, 166b, 167a, 167b are rotated together. It becomes possible. Therefore, each roller can be rotated in an ink film generation process before the start of printing, an ink cleaning process after the end of printing, and the like, and various operations can be performed smoothly.

In the offset web offset press for newspaper according to the first embodiment, the first ink application rollers 106a, 106b 166a, 166b are set to have the same diameter as the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b. The ink forming rollers 107a, 107b, 167a, and 167b are set to have a smaller diameter than the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, and 44b, and can reciprocate along the axial direction. Accordingly, the first ink application rollers 106a, 106b, 166a, 166b have the same diameter as the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b, and the second ink application rollers 107a, 107b, 167a, By reducing the diameter of 167b, the ink kneading effect can be enhanced, and the history of ink supply can be effectively eliminated by enabling the second ink application rollers 107a, 107b, 167a, 167b to reciprocate. Thus, the occurrence of ghost can be suppressed and the printing quality can be improved.

In the newspaper offset rotary printing press of Example 1, the ink delivery rollers 103a, 103b, 163a, 163b are provided with an 11-polyamide film or a 12-polyamide film on the surface, and the surface of the polyamide film with respect to the axial direction O A plurality of corner portions 111 are formed along a direction inclined by a predetermined angle θ. Therefore, high lipophilicity on the surfaces of the ink delivery rollers 103a, 103b, 163a, 163b is ensured, ink can be delivered well, and a plurality of inclined corners 111 are formed on the surface of the polyamide film. Thus, a predetermined amount of ink can be supplied by the plurality of corner portions 111 scraping off the ink.

In the ink supply method of the first embodiment, the ink is supplied to the ink delivery rollers 103a, 103b, 163a, 163b to form an ink film on the surface, and the ink delivery rollers 103a, 103b, 163a, 163b. The ink film is transferred to the ink kneading rollers 104a, 104b, 164a, 164b to form an ink film on the surface, and dampening water is supplied onto the ink films of the ink kneading rollers 104a, 104b, 164a, 164b. A step of forming a water film, and a step of transferring the ink film and water film of the ink kneading rollers 104a, 104b, 164a, 164b to the ink reciprocating rollers 105a, 105b, 165a, 165b to form a water film and an ink film on the surface. The water film and ink film of the ink reciprocating rollers 105a, 105b, 165a, 165b The first and second ink application rollers 106a, 106b, 107a, 107b, 166a, 166b, 167a and 167b are transferred to form an ink film and a water film on the surface, and the first and second ink application rollers 106a. 106b, 107a, 107b, 166a, 166b, 167a, 167b, the ink film and the water film are transferred to the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b, and the water film and the ink film are formed on the surface. Forming.

Therefore, if dampening water is supplied to the ink supply source side where the ink film thickness is large, the amount of ink that can be taken in by the dampening water increases, but the ink supply is hindered by the supplied dampening water and ink transfer is prevented. It may get worse. For this reason, by supplying dampening water to the ink kneading rollers 104a, 104b, 164a, 164b, a fine balance between the amount of ink that can be taken in by the ink and the amount of ink supplied can be appropriately secured. The dampening water can be supplied to the upstream side in the supply path while maintaining a good balance with the ink supply amount, and the print quality can be improved.

In the ink supply method of the first embodiment, the first and second ink application rollers 106a, 106b, 107a, 107b, 166a, 166b, 167a, 167b are formed with a water film on the surface of the ink film, and the plate cylinders 41a, 41b. , 42a, 42b, 43a, 43b, 44a, 44b, a water film is first attached to the surface. Accordingly, the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, and 44b are supplied with water films first from the respective ink forming rollers 106a, 106b, 107a, 107b, 166a, 166b, 167a, and 167b. Thus, the ink film is supplied, the boundary between the image area and the non-image area is stabilized, and the print quality can be improved.

FIG. 10 is a schematic diagram showing a roller arrangement of printing units in a newspaper offset rotary printing press as a printing press according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

In the newspaper offset rotary printing press according to the second embodiment, as shown in FIG. 10, the stack 22 in the printing unit U1 includes a pair of blanket cylinders 32a and 32b, a pair of plate cylinders 42a and 42b, and a pair of ink supply devices. 52a, 52b and a pair of dampening devices 62a, 62b.

In this case, the ink supply devices 52a and 52b include ink fountains 161a and 161b and ink original rollers 162a and 162b, ink delivery rollers 163a and 163b, ink kneading rollers 164a and 164b, ink reciprocating rollers 165a and 165b, The first ink form rollers 166a and 166b and the second ink form rollers 167a and 167b are configured.

The ink reciprocating rollers 165a and 165b, the plate cylinders 42a and 42b, and the blanket cylinders 32a and 32b can be driven and rotated in synchronization by the first driving devices 171a and 171b. The ink transfer rollers 163a and 163b, the ink kneading rollers 164a and 164b, and the ink adhering rollers 166a, 166b, 167a, and 167b that directly or indirectly contact the ink reciprocating rollers 165a and 165b and the plate cylinders 42a and 42b, The first driving devices 171a and 171b can be driven and rotated by a driving force based on the first driving devices 171a and 171b. The ink reciprocating rollers 165a and 165b can be reciprocated in the axial direction by the swinging devices 181a and 181b. The second ink adhering rollers 167a and 167b receive a swinging force from the ink reciprocating rollers 165a and 165b. It can be reciprocated by being connected in the axial direction.

In the second embodiment, the ink reciprocating rollers 165a and 165b can be driven and rotated, and the ink delivery rollers 163a and 163b can be rotated together. Description of supply and dampening water supply is omitted.

As described above, the newspaper offset rotary printing press according to the second embodiment includes the first driving devices 171a and 171b that drive and rotate the ink reciprocating rollers 165a and 165b, the plate cylinders 42a and 42b, and the blanket cylinders 32a and 32b. The ink delivery rollers 163a and 163b, the ink kneading rollers 164a and 164b, and the first and second ink application rollers 166a, 166b, 167a, and 167b are driven in rotation.

Therefore, by arranging a rotating roller between the driven rollers, an appropriate slip is generated due to the rotation, and the ink kneading effect can be enhanced without increasing the number of rollers. Further, when the plate cylinders 42a and 42b are separated from the ink applying rollers 166a, 166b, 167a and 167b, the ink transfer rollers 165a and 165b and the ink adhering rollers 164a and 164b and the respective ink applying rollers 166a are moved by the ink reciprocating rollers 165a and 165b. , 166b, 167a, 167b can be rotated together. Therefore, each roller can be rotated in an ink film generation process before the start of printing, an ink cleaning process after the end of printing, and the like, and various operations can be performed smoothly.

FIG. 11 is a schematic diagram showing a roller arrangement of a printing unit in a newspaper offset rotary printing press as a printing press according to Embodiment 3 of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

In the newspaper offset rotary printing press according to the third embodiment, as shown in FIG. 11, the stack 22 in the printing unit U1 includes a pair of blanket cylinders 32a and 32b, a pair of plate cylinders 42a and 42b, and a pair of ink supply devices. 52a, 52b and a pair of dampening devices 62a, 62b.

In this case, the ink supply devices 52a and 52b include ink fountains 161a and 161b and ink original rollers 162a and 162b, ink delivery rollers 163a and 163b, ink kneading rollers 164a and 164b, ink reciprocating rollers 165a and 165b, The first ink form rollers 166a and 166b and the second ink form rollers 167a and 167b are configured.

The ink delivery rollers 163a and 163b, the plate cylinders 42a and 42b, and the blanket cylinders 32a and 32b can be driven and rotated in synchronization by the first driving devices 171a and 171b. Ink kneading rollers 164a and 164b, ink reciprocating rollers 165a and 165b, and ink adhering rollers 166a, 166b, 167a and 167b that directly or indirectly contact the ink delivery rollers 163a and 163b and the plate cylinders 42a and 42b, The first driving devices 171a and 171b can be driven and rotated by a driving force based on the first driving devices 171a and 171b. The ink reciprocating rollers 165a and 165b can be reciprocated in the axial direction by the swinging devices 181a and 181b. The second ink adhering rollers 167a and 167b receive a swinging force from the ink reciprocating rollers 165a and 165b. Receiving and reciprocatingly swinging in the axial direction.

The ink reciprocating rollers 165a and 165b are in contact with rider rollers (contact rollers) 168a and 168b. The rider rollers (contact rollers) 168a and 168b are located on the downstream side of the contact position with the ink mixing rollers 164a and 164b with respect to the ink reciprocating rollers 165a and 165b, and are paired with the first ink application rollers 166a and 166b. It is facing upstream from the contact position. The rider rollers 168a and 168b are rubber rollers and are set to have a smaller diameter than the ink kneading rollers 164a and 164b, and are in contact with the surfaces of the ink reciprocating rollers 165a and 165b without being fixed at both ends. . The rider rollers 168a and 168b can be rotated with each other by contacting the ink reciprocating rollers 165a and 165b with a predetermined nip pressure (nip width), and knead the ink appropriately to adjust the viscosity to an optimum level. To do. The number of rider rollers 168a and 168b is not limited to one.

Accordingly, the ink base rollers 162a and 162b rotate, a predetermined amount of ink is transferred from the ink fountains 161a and 161b to the ink kneading rollers 164a and 164b through the ink transfer rollers 163a and 163b, and the ink reciprocating rollers 165a are transferred from the ink kneading rollers 164a and 164b. , 165b. At this time, the rider rollers 168a and 168b are rotated in contact with the ink reciprocating rollers 165a and 165b, whereby the ink is kneaded and adjusted to an optimum viscosity. The dampening devices 62a and 62b supply dampening water directly to the ink kneading rollers 164a and 164b.

Then, since the ink reciprocating rollers 165a and 165b reciprocate in the axial direction with respect to the ink kneading rollers 164a and 164b, the ink and the fountain solution are uniformly spread in the axial direction, that is, the width direction of the web W, Ink is kneaded to a predetermined viscosity. The ink and dampening water formed to have a predetermined film thickness are supplied from the ink reciprocating rollers 165a and 165b to the first and second ink application rollers 166a, 166b, 167a and 167b, and the ink application rollers 166a and 166b. , 167a and 167b are supplied to the plate surfaces (image line portion and non-image line portion) of the plate cylinders 42a and 42b. The ink adhered to the plate surfaces of the plate cylinders 42a and 42b is transferred to the blanket cylinders 32a and 32b, and a predetermined printing pressure is applied to the web W between the pair of blanket cylinders 32a and 32b. The ink on the blanket cylinders 32a and 32b is transferred to the surface of the web W as a pattern, and duplex printing is performed.

At this time, the ink kneading rollers 164a and 164b are supplied with dampening water from the dampening devices 62a and 62b after the ink is supplied from the ink delivery rollers 163a and 163b. Therefore, the ink film and the water film are supplied from the ink kneading rollers 164a and 164b to the plate cylinders 42a and 42b through the ink application rollers 166a, 166b, 167a and 167b, respectively. After the ink is supplied, the ink film is supplied. That is, in the plate cylinders 42a and 42b, after a water film (fountain solution) adheres to a non-image area that is a blank sheet, an ink film is supplied to an image area that forms a picture. As a result, in the plate cylinders 42a and 42b, the adhesion of the ink film to the non-image area is suppressed, and the ink adheres properly to the image area, and the boundary between the image area and the non-image area is stable. In addition, the print quality is improved.

Thus, in the newspaper offset rotary printing press of Example 3, the ink fountains 161a and 161b, the ink source rollers 162a and 162b, the ink delivery rollers 163a and 163b, the ink kneading rollers 164a and 164b, and the ink Reciprocating rollers 165a, 165b, first and second ink adhering rollers 166a, 166b, 167a, 167b having different diameters, plate cylinders 42a, 42b, blanket cylinders 32a, 32b, and ink kneading rollers 164a, 164b Dampening devices 62a and 62b for supplying dampening water and lidar rollers 168a and 168b that contact the ink reciprocating rollers 165a and 165b are provided.

Accordingly, after the ink is transferred from the ink kneading rollers 164a and 164b to the ink reciprocating rollers 165a and 165b, the ink is kneaded between the lidar rollers 168a and 168b and the ink reciprocating rollers 165a and 165b, and the ink kneading effect is enhanced. The viscosity can be adjusted to the optimum. That is, when the lidar rollers 168a and 168b are brought into contact with the ink reciprocating rollers 165a and 165b, the number of nips can be increased, so that the water mark marks can be eliminated by the dampening devices 62a and 62b and the pattern marks can be obtained by the ink delivery rollers 163a and 163b. Can be eliminated, and the print quality can be improved.

FIG. 12 is a schematic view showing a roller arrangement of printing units in a newspaper offset rotary printing press as a printing press according to Embodiment 4 of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

In the newspaper offset rotary printing press of the fourth embodiment, as shown in FIG. 12, the stack 22 in the printing unit U1 includes a pair of blanket cylinders 32a and 32b, a pair of plate cylinders 42a and 42b, and a pair of ink supply devices. 52a, 52b and a pair of dampening devices 62a, 62b.

In this case, the ink supply devices 52a and 52b include ink fountains 161a and 161b and ink original rollers 162a and 162b, ink delivery rollers 163a and 163b, ink kneading rollers 164a and 164b, ink reciprocating rollers 165a and 165b, The first ink form rollers 166a and 166b and the second ink form rollers 167a and 167b are configured.

The ink delivery rollers 163a and 163b, the plate cylinders 42a and 42b, and the blanket cylinders 32a and 32b can be driven and rotated in synchronization by the first driving devices 171a and 171b. Ink kneading rollers 164a and 164b, ink reciprocating rollers 165a and 165b, and ink adhering rollers 166a, 166b, 167a and 167b that directly or indirectly contact the ink delivery rollers 163a and 163b and the plate cylinders 42a and 42b, The first driving devices 171a and 171b can be driven and rotated by a driving force based on the first driving devices 171a and 171b. The ink reciprocating rollers 165a and 165b can be reciprocated in the axial direction by the swinging devices 181a and 181b. The second ink adhering rollers 167a and 167b receive a swinging force from the ink reciprocating rollers 165a and 165b. It can be reciprocated by being connected in the axial direction.

Further, the dampening devices 62a and 62b have chrome rollers 169a and 169b which are in contact with the ink kneading rollers 164a and 164b and whose main component of the surface material is chrome. The chrome rollers 169a and 169b are metal rollers and have a smaller diameter than the ink kneading rollers 164a and 164b. The chrome rollers 169a and 169b can be rotated by contacting the ink kneading rollers 164a and 164b with a predetermined nip pressure (nip width), and after spreading the sprayed fountain solution in the axial direction, It is supplied to the rollers 164a and 164b.

Accordingly, the ink base rollers 162a and 162b rotate, and a predetermined amount of ink is delivered from the ink fountains 161a and 161b to the ink kneading rollers 164a and 164b through the ink delivery rollers 163a and 163b. The dampening devices 62a and 62b supply dampening water to the chrome rollers 169a and 169b. The chrome rollers 169a and 169b spread dampening water in the axial direction and supply the dampening water to the ink kneading rollers 164a and 164b.

Then, since the ink reciprocating rollers 165a and 165b reciprocate in the axial direction with respect to the ink kneading rollers 164a and 164b, the ink and the fountain solution are uniformly spread in the axial direction, that is, the width direction of the web W, Ink is kneaded to a predetermined viscosity. The ink and dampening water formed to have a predetermined film thickness are supplied from the ink reciprocating rollers 165a and 165b to the first and second ink application rollers 166a, 166b, 167a and 167b, and the ink application rollers 166a and 166b. , 167a and 167b are supplied to the plate surfaces (image line portion and non-image line portion) of the plate cylinders 42a and 42b. The ink adhered to the plate surfaces of the plate cylinders 42a and 42b is transferred to the blanket cylinders 32a and 32b, and a predetermined printing pressure is applied to the web W between the pair of blanket cylinders 32a and 32b. The ink on the blanket cylinders 32a and 32b is transferred to the surface of the web W as a pattern, and duplex printing is performed.

At this time, the ink kneading rollers 164a and 164b are supplied with dampening water from the dampening devices 62a and 62b after the ink is supplied from the ink delivery rollers 163a and 163b. Therefore, the ink film and the water film are supplied from the ink kneading rollers 164a and 164b to the plate cylinders 42a and 42b through the ink application rollers 166a, 166b, 167a and 167b, respectively. After the ink is supplied, the ink film is supplied. That is, in the plate cylinders 42a and 42b, after a water film (fountain solution) adheres to a non-image area that is a blank sheet, an ink film is supplied to an image area that forms a picture. As a result, in the plate cylinders 42a and 42b, the adhesion of the ink film to the non-image area is suppressed, and the ink adheres properly to the image area, and the boundary between the image area and the non-image area is stable. In addition, the print quality is improved.

Thus, in the newspaper offset rotary printing press of Example 4, the ink fountains 161a and 161b, the ink source rollers 162a and 162b, the ink delivery rollers 163a and 163b, the ink kneading rollers 164a and 164b, and the ink Reciprocating rollers 165a, 165b, first and second ink adhering rollers 166a, 166b, 167a, 167b having different diameters, plate cylinders 42a, 42b, blanket cylinders 32a, 32b, and ink kneading rollers 164a, 164b Dampening devices 62a and 62b having chrome rollers 169a and 169b for supplying dampening water are provided.

Accordingly, after the ink is transferred from the ink transfer rollers 163a and 163b to the ink kneading rollers 164a and 164b, the dampening water of the dampening devices 62a and 62b is transferred from the chrome rollers 169a and 169b to the ink kneading rollers 164a and 164b. Accordingly, the fountain solution can be uniformly and stably supplied to the ink kneading rollers 164a and 164b.

FIG. 13 is a schematic view showing a roller arrangement of printing units in a newspaper offset rotary printing press as a printing press according to Embodiment 5 of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

In the newspaper offset rotary printing press of Example 5, as shown in FIG. 13, the stack 22 in the printing unit U1 includes a pair of blanket cylinders 32a and 32b, a pair of plate cylinders 42a and 42b, and a pair of ink supply devices. 52a, 52b and a pair of dampening devices 62a, 62b.

In this case, the ink supply devices 52a and 52b include ink fountains 161a and 161b and ink original rollers 162a and 162b, ink delivery rollers 163a and 163b, ink kneading rollers 164a and 164b, ink reciprocating rollers 165a and 165b, The first ink form rollers 166a and 166b and the second ink form rollers 167a and 167b are configured.

The ink reciprocating rollers 165a and 165b, the plate cylinders 42a and 42b, and the blanket cylinders 32a and 32b can be driven and rotated in synchronization by the first driving devices 171a and 171b. The ink transfer rollers 163a and 163b, the ink kneading rollers 164a and 164b, and the ink adhering rollers 166a, 166b, 167a, and 167b that directly or indirectly contact the ink reciprocating rollers 165a and 165b and the plate cylinders 42a and 42b, The first driving devices 171a and 171b can be driven and rotated by a driving force based on the first driving devices 171a and 171b. The ink reciprocating rollers 165a and 165b can be reciprocated in the axial direction by the swinging devices 181a and 181b. The second ink adhering rollers 167a and 167b receive a swinging force from the ink reciprocating rollers 165a and 165b. It can be reciprocated by being connected in the axial direction.

Further, the dampening devices 62a and 62b have leveling rollers 191a and 191b that come into contact with the ink kneading rollers 164a and 164b, respectively. The leveling rollers 191a and 191b are set to have a smaller diameter than the ink kneading rollers 164a and 164b. The leveling rollers 191a and 191b can be rotated together by contacting the ink kneading rollers 164a and 164b with a predetermined nip pressure (nip width). The dampening devices 62a and 62b have a spray nozzle so that granular dampening water can be supplied, and supply the dampening water directly to the ink kneading rollers 164a and 164b by a spray method.

In this case, the dampening devices 62a and 62b can supply dampening water to the upstream side in the rotational direction of the ink kneading rollers 164a and 164b with respect to the leveling rollers 191a and 191b. Specifically, dampening devices 62a and 62b are disposed on one side of the ink kneading rollers 164a and 164b, and leveling rollers 191a and 191b are disposed below the dampening devices 62a and 62b on one side. The dampening devices 62a and 62b and the leveling rollers 191a and 191b are positioned vertically.

The leveling rollers 191a and 191b are rubber rollers or chrome (metal) rollers whose main component of the surface material is chrome.

Accordingly, the ink base rollers 162a and 162b rotate, and a predetermined amount of ink is delivered from the ink fountains 161a and 161b to the ink kneading rollers 164a and 164b through the ink delivery rollers 163a and 163b. Further, the dampening devices 62a and 62b supply dampening water upstream of the contact positions of the ink kneading rollers 164a and 164b with the leveling rollers 191a and 191b. The dampening water supplied to the surfaces of the ink kneading rollers 164a and 164b is spread in the circumferential direction and the axial direction at the nip portion with the leveling rollers 191a and 191b, and a water film having a uniform thickness is formed. It is formed.

In addition, when the dampening devices 62a and 62b supply dampening water to the ink kneading rollers 164a and 164b, the leveling rollers 191a and 191b are positioned below the supply position for the ink kneading rollers 164a and 164b. Even if the dampening devices 62a and 62b supply the spray-type granular dampening water, most of the dampening water is supplied to the ink kneading rollers 164a and 164b or the leveling rollers 191a and 191b. Water can be supplied.

Thereafter, since the ink reciprocating rollers 165a and 165b reciprocate in the axial direction with respect to the ink kneading rollers 164a and 164b, the ink and the fountain solution are uniformly spread in the axial direction, that is, the width direction of the web W, Ink is kneaded to a predetermined viscosity. The ink and dampening water formed to have a predetermined film thickness are supplied from the ink reciprocating rollers 165a and 165b to the first and second ink application rollers 166a, 166b, 167a and 167b, and the ink application rollers 166a and 166b. , 167a and 167b are supplied to the plate surfaces (image line portion and non-image line portion) of the plate cylinders 42a and 42b. The ink adhered to the plate surfaces of the plate cylinders 42a and 42b is transferred to the blanket cylinders 32a and 32b, and a predetermined printing pressure is applied to the web W between the pair of blanket cylinders 32a and 32b. The ink on the blanket cylinders 32a and 32b is transferred to the surface of the web W as a pattern, and duplex printing is performed.

At this time, the ink kneading rollers 164a and 164b are supplied with dampening water from the dampening devices 62a and 62b after the ink is supplied from the ink delivery rollers 163a and 163b. Therefore, the ink film and the water film are supplied from the ink kneading rollers 164a and 164b to the plate cylinders 42a and 42b through the ink application rollers 166a, 166b, 167a and 167b, respectively. After the ink is supplied, the ink film is supplied. That is, in the plate cylinders 42a and 42b, after a water film (fountain solution) adheres to a non-image area that is a blank sheet, an ink film is supplied to an image area that forms a picture. As a result, in the plate cylinders 42a and 42b, the adhesion of the ink film to the non-image area is suppressed, and the ink adheres properly to the image area, and the boundary between the image area and the non-image area is stable. In addition, the print quality is improved.

Thus, in the newspaper offset rotary printing press of Example 5, the ink fountains 161a and 161b, the ink source rollers 162a and 162b, the ink delivery rollers 163a and 163b, the ink kneading rollers 164a and 164b, and the ink Reciprocating rollers 165a and 165b, first and second ink adhering rollers 166a, 166b, 167a, and 167b having different diameters, plate cylinders 42a and 42b, blanket cylinders 32a and 32b, and ink kneading rollers 164a and 164b are in contact with each other. Dampening devices 62a and 62b that can supply dampening water upstream of the contact positions of the leveling rollers 191a and 191b and the leveling rollers 191a and 191b of the ink kneading rollers 164a and 164b are provided.

Accordingly, when the dampening devices 62a and 62b supply dampening water to the ink kneading rollers 164a and 164b, the dampening water is transferred from the ink kneading rollers 164a and 164b to the leveling rollers 191a and 191b to form a water film. Is done. At this time, since the leveling rollers 191a and 191b can hold the dampening water on the surface, the water film can be obtained by smoothing the dampening water supplied to the ink kneading rollers 164a and 164b in the circumferential direction and the axial direction. Can be made uniform, and a stable water film can be supplied downstream.

Further, when the leveling rollers 191a and 191b are rubber rollers, the weight of the rollers can be reduced, and the maintainability can be improved. In addition, the weight of the leveling rollers 191a and 191b can be easily rotated by receiving the rotational force of the ink mixing rollers 164a and 164b. On the other hand, if the leveling rollers 191a and 191b are chrome rollers, the hydrophilicity of the roller surface can be secured to form a stable water film, and the durability can be improved and the life can be extended. Can do.

FIG. 14 is a schematic view showing a roller arrangement of a printing unit in a newspaper offset rotary printing press as a printing press according to Embodiment 6 of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

In the newspaper offset rotary printing press of Example 6, as shown in FIG. 14, the stack 22 in the printing unit U1 includes a pair of blanket cylinders 32a and 32b, a pair of plate cylinders 42a and 42b, and a pair of ink supply devices. 52a, 52b and a pair of dampening devices 62a, 62b.

In this case, the ink supply devices 52a and 52b include ink fountains 161a and 161b and ink original rollers 162a and 162b, ink delivery rollers 163a and 163b, ink kneading rollers 164a and 164b, ink reciprocating rollers 165a and 165b, The first ink form rollers 166a and 166b and the second ink form rollers 167a and 167b are configured.

The ink reciprocating rollers 165a and 165b, the plate cylinders 42a and 42b, and the blanket cylinders 32a and 32b can be driven and rotated in synchronization by the first driving devices 171a and 171b. The ink transfer rollers 163a and 163b, the ink kneading rollers 164a and 164b, and the ink adhering rollers 166a, 166b, 167a, and 167b that directly or indirectly contact the ink reciprocating rollers 165a and 165b and the plate cylinders 42a and 42b, The first driving devices 171a and 171b can be driven and rotated by a driving force based on the first driving devices 171a and 171b. The ink reciprocating rollers 165a and 165b can be reciprocated in the axial direction by the swinging devices 181a and 181b. The second ink adhering rollers 167a and 167b receive a swinging force from the ink reciprocating rollers 165a and 165b. It can be reciprocated by being connected in the axial direction.

Further, the dampening devices 62a and 62b have leveling rollers 192a and 192b that come into contact with the ink kneading rollers 164a and 164b, respectively. The leveling rollers 192a and 192b are set to have a smaller diameter than the ink kneading rollers 164a and 164b. The leveling rollers 192a and 192b can be rotated together by contacting the ink kneading rollers 164a and 164b with a predetermined nip pressure (nip width). The dampening devices 62a and 62b have a spray nozzle so that granular dampening water can be supplied, and supply the dampening water directly to the ink kneading rollers 164a and 164b by a spray method.

In this case, the dampening devices 62a and 62b can supply dampening water to the upstream side in the rotation direction from the contact position of the ink kneading rollers 164a and 164b with the leveling rollers 192a and 192b. Specifically, dampening devices 62a and 62b are arranged on one side of the ink kneading rollers 164a and 164b, and leveling rollers 192a and 192b are arranged below the dampening devices 62a and 62b on one side. The dampening devices 62a and 62b and leveling rollers 192a and 192b are positioned vertically.

Further, the ink kneading rollers 164a and 164b can reciprocate along the axial direction. In this case, the ink kneading rollers 164a and 164b receive a swinging force from the ink reciprocating rollers 165a and 165b that are in contact with each other, and are reciprocally moved in the axial direction.

Accordingly, the ink base rollers 162a and 162b rotate, and a predetermined amount of ink is delivered from the ink fountains 161a and 161b to the ink kneading rollers 164a and 164b through the ink delivery rollers 163a and 163b. Further, the dampening devices 62a and 62b supply dampening water upstream of the contact positions of the ink kneading rollers 164a and 164b with the leveling rollers 192a and 192b. The dampening water supplied to the surfaces of the ink kneading rollers 164a and 164b is spread in the circumferential direction and the axial direction at the nip portion with the leveling rollers 192a and 192b, and a water film having a uniform thickness is formed. It is formed.

Further, since the ink kneading rollers 164a and 164b reciprocate, slip occurs between the ink kneading rollers 164a and 164b and the leveling rollers 192a and 192b, and the dampening supplied to the ink kneading rollers 164a and 164b. Water is smoothed at the nip portion, and a water film having a uniform thickness can be formed on the ink kneading rollers 164a and 164b.

Thereafter, since the ink reciprocating rollers 165a and 165b reciprocate in the axial direction with respect to the ink kneading rollers 164a and 164b, the ink and the fountain solution are uniformly spread in the axial direction, that is, the width direction of the web W, Ink is kneaded to a predetermined viscosity. The ink and dampening water formed to have a predetermined film thickness are supplied from the ink reciprocating rollers 165a and 165b to the first and second ink application rollers 166a, 166b, 167a and 167b, and the ink application rollers 166a and 166b. , 167a and 167b are supplied to the plate surfaces (image line portion and non-image line portion) of the plate cylinders 42a and 42b. The ink adhered to the plate surfaces of the plate cylinders 42a and 42b is transferred to the blanket cylinders 32a and 32b, and a predetermined printing pressure is applied to the web W between the pair of blanket cylinders 32a and 32b. The ink on the blanket cylinders 32a and 32b is transferred to the surface of the web W as a pattern, and duplex printing is performed.

At this time, the ink kneading rollers 164a and 164b are supplied with dampening water from the dampening devices 62a and 62b after the ink is supplied from the ink delivery rollers 163a and 163b. Therefore, the ink film and the water film are supplied from the ink kneading rollers 164a and 164b to the plate cylinders 42a and 42b through the ink application rollers 166a, 166b, 167a and 167b, respectively. After the ink is supplied, the ink film is supplied. That is, in the plate cylinders 42a and 42b, after a water film (fountain solution) adheres to a non-image area that is a blank sheet, an ink film is supplied to an image area that forms a picture. As a result, in the plate cylinders 42a and 42b, the adhesion of the ink film to the non-image area is suppressed, and the ink adheres properly to the image area, and the boundary between the image area and the non-image area is stable. In addition, the print quality is improved.

Thus, in the newspaper offset rotary printing press of Example 6, the ink fountains 161a and 161b, the ink fountain rollers 162a and 162b, the ink delivery rollers 163a and 163b, and the ink kneading that reciprocates in the axial direction. Rollers 164a, 164b, ink reciprocating rollers 165a, 165b, first and second ink application rollers 166a, 166b, 167a, 167b having different diameters, plate cylinders 42a, 42b, blanket cylinders 32a, 32b, and ink kneading A dampening device 62a that can supply dampening water upstream of the contact positions of the leveling rollers 192a and 192b that come into contact with the rollers 164a and 164b and the leveling rollers 192a and 192b in the ink kneading rollers 164a and 164b. 62b.

Accordingly, when the ink kneading rollers 164a and 164b reciprocate, slip occurs between the ink kneading rollers 164a and 164b and the leveling rollers 192a and 192b, and the ink kneading rollers 164a and 164b from the dampening devices 62a and 62b. The dampening water supplied to the water is leveled between the ink kneading rollers 164a and 164b and the leveling rollers 192a and 192b, so that a water film having a uniform thickness can be supplied downstream. it can.

In this embodiment, the ink kneading rollers 164a and 164b are configured to reciprocate. However, the leveling rollers 192a and 192b may be configured to reciprocate, or the leveling rollers may be the ink kneading rollers 164a and 164b. Both 192a and 192b may be configured to reciprocate.

In Examples 5 and 6, the dampening devices 62a and 62b having spray nozzles are used in order to enable the dampening device to supply the dampening water in a granular form to the ink kneading roller. However, the present invention is limited to this configuration. Is not to be done. For example, a brush-type dampening device may be used. This brush-type dampening device rotates a water source roller composed of a synthetic fiber brush roller, and sprays water droplets on the brush by a doctor to generate granular dampening water. To supply.

In the above-described embodiment, the driving force from the first driving device is described as being input to the plate cylinder, but may be input to the blanket cylinder or input to the impression cylinder. That is, the driving force from the first driving device directly or indirectly drives and rotates the plate cylinder, and the driving force drives the ink application roller, the ink reciprocating roller, the ink kneading roller, the ink delivery roller and the like. If you can do it.

In the embodiment described above, the outer diameter (peripheral length) of the first ink application roller is the same as that of the plate cylinder, and the outer diameter (peripheral length) of the second ink application roller is smaller than that of the plate cylinder. The landing roller is disposed in contact with the downstream side in the rotational direction of the plate cylinder, and the second ink deposition roller is disposed in contact with the upstream side in the rotational direction of the plate cylinder. You may arrange | position a 2 ink form roller reversely.

In the embodiment described above, the blanket cylinder is doubled with respect to the plate cylinder, but the plate cylinder and the blanket cylinder may have the same diameter.

In the above-described embodiment, the ink reciprocating rollers 105a, 105b, 165a, and 165b can be reciprocated in the axial direction by the swinging devices 131a, 131b, 181a, and 181b. In this case, it is desirable to set the period and amount of movement (reciprocal movement in the axial direction) of the ink reciprocating rollers 105a, 105b, 165a, and 165b to the optimum values. Specifically, it is desirable that the ink reciprocating rollers 105a, 105b, 165a, and 165b reciprocate once while the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, and 44b rotate 6-15 times. For example, if the ink reciprocating rollers 105a, 105b, 165a, and 165b reciprocate once while the plate cylinders 41a, 41b, 42a, 42b, 43a, 43b, 44a, and 44b rotate 5 times, vibration is likely to occur, and the plate cylinder 41a. , 41b, 42a, 42b, 43a, 43b, 44a, 44b, when the ink reciprocating rollers 105a, 105b, 165a, 165b reciprocate once, the ink film thickness does not become uniform and the print quality becomes uniform. descend.

In order to adjust the cycle of the ink reciprocating rollers 105a, 105b, 165a, and 165b, the reduction ratio between the worm gear 204 and the worm wheel 210 may be changed in the structure shown in FIGS. Further, in order to adjust the amount of movement of the ink reciprocating rollers 105a, 105b, 165a, 165b, the amount of eccentricity e between the axis of the eccentric shaft 207 and the axis of the shaft portion 208 may be changed. Further, it may be configured to adjust the period and the moving amount of the ink reciprocating rollers 105a, 105b, 165a, 165b using a motor.

Further, in the above-described embodiment, the ink delivery rollers 103a, 103b, 163a, 163b are metal rollers, the surface is provided with an 11-polyamide film or a 12-polyamide film, and the surface has a plurality of corners inclined by a predetermined angle θ. 111, and a plurality of corners 111 scrape off the ink, whereby a predetermined amount of ink can be supplied. In this case, by optimizing the flow rate (flowability) and viscosity of the ink (increase in flow rate and decrease in viscosity), a smooth roller without the corner 111 on the surface can be used. Also, by optimizing the flow rate (fluidity) and viscosity of the ink, a grid-like pattern can be formed on the roller surface, a copper plating film can be formed on the roller surface, and a grid can be formed on the copper plating film. An eye-shaped pattern can be formed.

Further, in the above-described embodiments, the printing press of the present invention has been described as applied to a newspaper offset rotary printing press, but may be applied to a commercial offset rotary printing press, an offset sheet-fed printing press, and the like. It may be a double-sided printing machine or a single-sided printing machine.

R paper feeding device R1 to R7 paper feeding unit I infeed device I1 to I7 infeed unit U printing device U1 to U6, U11 to U62 printing unit D web pass device D1, D2 web pass unit F folding machine F1, F2 folding unit 21, 22, 23, 24 Stack 31a, 31b, 32a, 32b, 33a, 33b, 34a, 34b Blanket cylinder 41a, 41b, 42a, 42b, 43a, 43b, 44a, 44b Plate cylinder 51a, 51b, 52a, 52b, 53a, 53b, 54a, 54b Ink supply device 61a, 61b, 62a, 62b, 63a, 63b, 64a, 64b Dampening device 101a, 101b, 161a, 161b Ink fountain (ink supply source)
102a, 102b, 162a, 162b Ink base roller (ink supply source)
103a, 103b, 163a, 163b Ink delivery rollers 104a, 104b, 164a, 164b Ink kneading rollers 105a, 105b, 165a, 165b Ink reciprocating rollers 106a, 106b, 166a, 166b First ink application rollers 107a, 107b, 167a, 167b Two- ink adhering rollers 121a, 121b, 171a, 171b First driving devices 122a, 122b, 172a, 172b Second driving devices 131a, 131b, 181a, 181b Oscillating devices 168a, 168b Rider rollers (contact rollers)
169a, 169b Chrome roller 191a, 191b, 192a, 192b Leveling roller W Web (print medium)

Claims (15)

1. An ink source;
   An ink delivery roller through which ink is delivered from the ink supply source;
   An ink kneading roller in contact with the ink delivery roller;
   An ink reciprocating roller in contact with the ink kneading roller;
   First and second ink application rollers having different diameters in contact with the ink reciprocating roller;
   A plate cylinder in contact with the first and second ink application rollers;
   A blanket cylinder in contact with the plate cylinder;
   A dampening device that supplies dampening water to the ink kneading roller from which ink has been delivered from the ink delivery roller;
   A printing machine comprising:
2. The dampening device supplies dampening water downstream from the contact position with the ink delivery roller in the rotation direction of the ink kneading roller and upstream from the contact position with the ink reciprocating roller. The printing press according to claim 1.
3. A drive device for driving and rotating the ink delivery roller, the plate cylinder, and the blanket cylinder is provided, and the ink kneading roller, the ink reciprocating roller, and the first and second ink application rollers are driven together. The printing machine according to claim 1 or 2.
4. A drive device for driving and rotating the ink reciprocating roller, the plate cylinder, and the blanket cylinder is provided, and the ink delivery roller, the ink kneading roller, and the first and second ink application rollers are driven together. The printing machine according to claim 1 or 2.
5. Downstream of the ink kneading roller and upstream of the first ink adhering roller, the ink reciprocating roller is downstream of the contact position with the ink kneading roller and the first ink. The printing press according to any one of claims 1 to 4, further comprising a contact roller that contacts the upstream side of a contact position with the landing roller.
6. The printing machine according to claim 5, wherein the contact roller includes a rider roller.
7. The printing machine according to any one of claims 1 to 6, wherein the dampening device includes a chrome roller that is in contact with the ink kneading roller and whose main component of surface material is chrome.
8. The first ink application roller is set to have the same diameter as the plate cylinder, and the second ink application roller is set to have a smaller diameter than the plate cylinder, and is capable of reciprocating along the axial direction. The printing press according to any one of claims 1 to 7, characterized in that:
9. The ink delivery roller is provided with an 11-polyamide film or a 12-polyamide film on the surface, and a plurality of corners along a direction inclined by a predetermined angle with respect to the axial direction are formed on the surface of the polyamide film. The printing press according to any one of claims 1 to 8, characterized in that:
10. A leveling roller that is in contact with the ink kneading roller is provided, and the dampening device is capable of supplying dampening water upstream from a position of contact with the leveling roller in the ink kneading roller. The printing machine according to any one of claims 1 to 9.
11. The printing machine according to claim 10, wherein the dampening device can supply dampening water in a granular form to the ink kneading roller.
12. 12. The printing machine according to claim 10, wherein at least one of the ink kneading roller and the leveling roller is reciprocally movable along an axial direction.
13. The printing machine according to any one of claims 10 to 12, wherein the leveling roller is a rubber roller.
14. The printing machine according to any one of claims 10 to 12, wherein the leveling roller is a metal roller.
15. Supplying ink to an ink delivery roller to form an ink film on the surface;
    Transferring the ink film of the ink delivery roller to an ink kneading roller to form an ink film on the surface;
    Supplying dampening water on the ink film of the ink kneading roller to form a water film;
    Transferring the ink film and water film of the ink kneading roller to an ink reciprocating roller to form a water film and an ink film on the surface;
    Transferring the water film and the ink film of the ink reciprocating roller to first and second ink application rollers having different diameters to form an ink film and a water film on the surface;
    Transferring the ink film and the water film of the first and second ink application rollers to a plate cylinder to form a water film and an ink film on the surface;
    An ink supply method characterized by comprising:

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