JP2011148161A - Printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a printing machine in which printing quality is improved by suppressing wrinkles occurring when a surface treatment agent is fed or dried. <P>SOLUTION: The printing machine includes: a paper feeding device R which feeds a web W from the paper web; an infeed device I which imparts tension onto the web W unreeled from the paper feeding device R; a printing device U which conducts printing on the web W tensioned by the infeed device I; a folding machine F which forms a pullout binding by overlapping and folding a plurality of webs W printed by the printing device U; a surface treatment device G which feeds the surface treatment agent on the web W prior to the printing between the paper feed device R and the infeed device I. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a printing machine having a ground processing apparatus for performing ground processing on a printing surface of a printing paper and used as a rotary printing press for newspapers.

  For example, an offset rotary printing press for newspaper includes a paper feeding device having a plurality of paper feeding units, a printing device having a plurality of printing units, a web pass device, a folding machine having a plurality of folding units, and a paper discharging device. It consists of and. Therefore, when a web is supplied from the paper feeder to each printing unit, printing is performed on each web by each printing unit, and a plurality of web travel routes are changed by the web pass device in a predetermined order. After being overlaid, the web is vertically folded by a folding machine and then horizontally cut by a predetermined length. A folded sheet is formed by transverse folding, and the sheet is discharged as printed matter (newspaper).

  In recent years, the print quality of patterns such as color photographs has been greatly improved. However, if the whiteness (or brightness) of newspaper used in a newspaper press is relatively low, such as newspaper printing, it is required. In some cases, the printed pattern quality cannot be sufficiently obtained. In view of this, a technique has been proposed in which a printing material is transferred to a predetermined location on a sheet having a relatively low whiteness, and then printing is performed to ensure high printed picture quality while using newsprint.

  For example, in the offset printing machine described in Patent Document 1 below, a base treatment agent supply unit that supplies a water-based base treatment agent to the printing surface of the printing paper on the upstream side of the printing unit, and moisture on the back side of the printing surface. A water supply unit for supplying the liquid and a drying processing unit for drying both printed surfaces.

  By the way, in such an offset printing machine, the ground treatment agent applied to the printing surface of the printing paper is water-based from the viewpoint of the environment. For this reason, when a water-based base treatment agent is supplied to printing paper, the paper fibers will swell once, and then the paper fiber state will be different due to the shrinkage of the fibers accompanying the evaporation of moisture from the fibers due to drying. There are many cases, and as a result, the printing paper is curled. Therefore, in Patent Document 1, by supplying moisture to the back surface of the printing surface of the printing paper, the moisture state is brought closer between the printing surface and the back surface, and curling of the printing paper is suppressed.

JP 2008-273032 A

  However, in the above-described conventional offset printing machine, the base treatment agent supply unit, the moisture supply unit, and the drying processing unit are arranged on the upstream side of the printing unit and on the downstream side of the infeed unit. When printing at the printing section, it is important to keep the tension (tension) of the printing paper constant at an appropriate value. To secure this proper tension, a paper feed tension brake is provided in the paper feeding section. In addition, an infeed part is provided on the downstream side.

  As described above, since the tension in the printing unit is adjusted to an appropriate value by the feed tension brake and the infeed unit, the tension of the printing paper is low in the paper feeding unit (upstream side of the infeed unit) and printing is performed. It becomes high at the part (downstream side from the in-feed part). In the above-described conventional offset printing machine, the ground treatment agent supply unit and the like are provided on the downstream side of the infeed unit, so the printing paper is transported between a plurality of guide rollers in a state where high tension is secured. However, the supply of the surface treatment agent, the supply of moisture, and the drying are performed.

  As a result, the printing paper is swelled by the supply of moisture and contracted by drying, while high tension is secured. Therefore, in the printing paper, a high tension in the feeding direction varies between the pair of guide rollers, and the high tension fluctuation in the feeding direction also acts in the width direction, and wrinkles along the feeding direction are likely to occur. When wrinkles occur on the printing paper, there arises a problem that the print quality deteriorates.

  The present invention solves the above-described problems, and an object of the present invention is to provide a printing machine that can improve the printing quality by suppressing the generation of wrinkles during the supply of the surface treatment agent or the drying. .

  In order to achieve the above object, a printing machine according to the present invention includes a paper feeding device that supplies a web from a web, an infeed device that applies tension to the web fed from the paper feeding device, and the infeed device. A printing device that performs printing on a web to which tension is applied, a folding device that folds a plurality of webs that have been printed by the printing device to form a fold, and a space between the paper feeding device and the infeed device And a substrate processing apparatus for supplying a substrate processing agent to the web before printing.

  Therefore, when the web tension on the printing device side is adjusted to an appropriate value by the infeed device, the web tension on the substrate processing device side can be set lower than this appropriate value, and the web in a state where the tension is low. On the other hand, the surface treatment agent is supplied and dried, and the fluctuation in tension acting at this time can be minimized, and the generation of wrinkles on the web can be suppressed. As a result, the print quality can be improved. be able to.

  In the printing machine of the present invention, the ground treatment device includes a roll unit that transfers the ground treatment agent and supplies the web to the web, and a driving device that drives and rotates the roll unit, and the tension of the web in the roll unit is It is characterized by being set to be equal to the web tension in the paper feeding device and lower than the web tension applied by the infeed device.

  Therefore, by providing a roll unit that can be driven and rotated in the substrate processing apparatus, it is possible to adjust the web tension in the substrate processing apparatus by this roll unit, and the web tension in the roll unit is adjusted to the web tension in the sheet feeding device. By making it equal, it becomes possible to set the tension of the web in the substrate processing apparatus even lower, and the generation of wrinkles on the web can be appropriately suppressed.

  In the printing press according to the aspect of the invention, the paper feeding device includes a plurality of paper feeding units arranged in parallel, and the infeed device includes a plurality of infeed units arranged on the downstream side of the plurality of paper feeding units. The substrate processing apparatus is disposed between the plurality of sheet feeding units, and a first conveyance line through which a web from the sheet feeding unit is sent to the infeed unit via the substrate processing apparatus, The web from the paper feeding unit can be switched to a second transport line that is sent directly to the infeed unit.

  Therefore, the conveyance line can be easily switched between the case where the ground processing is performed on the web and the case where the ground processing is not performed, the workability of the printing work can be improved, and the ground processing device is arranged side by side with the paper feeding unit. Therefore, it is possible to arrange efficiently, and the enlargement of the entire printing press can be suppressed.

  The printing machine of the present invention is characterized in that a drying device is provided for drying the surface treatment agent supplied to the web by the surface treatment device.

  Therefore, while the ground treatment agent can be dried at an early stage by the drying device, the generation of wrinkles on the web can be appropriately suppressed.

  In the printing machine according to the aspect of the invention, the ground treatment agent is supplied to the first transport line while the ground treatment agent supply unit is disposed on the descending line in which the web from the paper feeding unit is transported downward. The drying device is arranged in a rising line where the web is reversed and conveyed upward.

  Therefore, it is possible to suppress an increase in the size of the entire printing press by efficiently arranging the base treatment agent supply unit and the drying device.

  In the printing machine of the present invention, a guide roller that guides the web conveyed from the ground processing device to the infeed device is provided, and wrinkle suppression is provided on the surface of the guide roller corresponding to the ground processing agent supply boundary on the web. A member is provided.

  Therefore, when the wrinkle suppressing member of the guide roller contacts the ground treatment agent supply boundary in the web, the web is maintained in the tension in the width direction, and the generation of wrinkles can be suppressed.

  In the printing machine of the present invention, a guide roller that guides the web conveyed downstream of the infeed device is provided, and a wrinkle suppressing member is provided on the surface of the guide roller corresponding to the surface treatment agent supply boundary in the web. It is characterized by being provided.

  Therefore, after the web is tensioned by the infeed device, the wrinkle suppression member of the guide roller comes into contact with the ground treatment agent supply boundary in the web, thereby suppressing the generation of wrinkles.

  In the printing machine of the present invention, the guide roller having the wrinkle suppressing member is disposed on the downstream side of the drying device disposed on the downstream side of the substrate processing apparatus.

  Therefore, the web is guided by the guide roller when the moisture of the substrate treatment agent evaporates by the drying device and the web is maintained in the width direction tension by the wrinkle suppression member, so that the generation of wrinkles is effectively performed. Can be suppressed.

  In the printing machine of the present invention, the web can print a plurality of pages in the width direction by the printing device, and the wrinkle suppression member is provided corresponding to a boundary of each page.

  Therefore, by supporting the web without the wrinkle suppression member being in contact with the printing surface, it is possible to prevent the occurrence of stains on the printing surface of the web, and to which page the ground treatment agent is supplied, Generation of wrinkles on the web can be appropriately suppressed.

  In the printing machine of the present invention, the wrinkle suppression member is provided to protrude outward at a predetermined position in the axial direction on the outer peripheral surface of the guide roller over the entire circumference.

  Therefore, with a simple configuration in which a protrusion along the circumferential direction is provided on the outer peripheral surface of the guide roller, the occurrence of wrinkles in the web can be suppressed, and the apparatus can be simplified.

  According to the printing machine of the present invention, since the ground processing device for supplying the ground processing agent to the web before printing is provided between the paper feeding device and the infeed device, the tension of the web in the ground processing device is reduced in the printing device. The tension can be set lower than the tension of the web, and it is possible to improve the printing quality by suppressing the generation of wrinkles during the supply of the base treatment agent or the drying.

FIG. 1 is a schematic diagram showing a paper feeding device, a ground processing device, and an infeed device in a newspaper offset rotary printing press as a printing press according to an embodiment of the present invention. FIG. 2 is a schematic configuration diagram illustrating a newspaper offset rotary printing press according to the present embodiment. FIG. 3 is a schematic view of a guide roller used in the substrate processing apparatus in the newspaper offset rotary printing press of this embodiment. FIG. 4 is a schematic view showing a modification of the guide roller used in the substrate processing apparatus of this embodiment. FIG. 5 is a schematic view showing a modification of the guide roller used in the substrate processing apparatus of this embodiment.

  Exemplary embodiments of a printing press according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example.

  FIG. 1 is a schematic diagram showing a paper feeding device, a ground processing device, and an infeed device in a newspaper offset rotary printing press as a printing press according to an embodiment of the present invention. FIG. 2 is a newspaper offset according to the present embodiment. FIG. 3 is a schematic configuration diagram showing a rotary printing machine, FIG. 3 is a schematic diagram of a guide roller used in a substrate processing apparatus in a newspaper offset rotary printing machine of this embodiment, and FIG. 4 is used in the substrate processing apparatus of this embodiment. FIG. 5 is a schematic diagram illustrating a modification of the guide roller used in the substrate processing apparatus of the present embodiment.

  As shown in FIG. 2, the printing press of the present embodiment is a newspaper offset rotary printing press, which is 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 this embodiment) of paper feeding units R1 to R7, and the infeed device I has a plurality (seven in this embodiment) of infeed units I1 to I7. The printing apparatus U has a plurality (six in this embodiment) of printing units U1 to U6, and the web pass apparatus D has a plurality (two in this embodiment) of web pass units D1. , D2 and the folding machine F has a plurality (two in this embodiment) of folding units F1, F2.

  In this case, the printing units U1 to U6 are described as six units. However, each of the printing units U1 to U6 can perform four-color printing, and can be divided vertically into twelve two-color printing units U11 and U12. , U21... U61, U62.

  In FIG. 1, the two folding units F1 and F2 are shown side by side, but actually, the operation side folding unit F1 and the driving side folding unit F2 are arranged side by side in a direction perpendicular to the paper surface. ing. 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 of this 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.

  Here, the above-described paper feeding device R, infeed device I, printing device U, web pass device D, and folding machine F will be described in detail.

  In the paper feeding device R, the paper feeding units R1 to R7 have substantially the same configuration, and are provided with a holding arm 11 that holds three webs on which the web W is wound in a roll shape. By doing so, the web can be rotated to the paper feed 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 causes the paper web at the paper feeding position to be fed. 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 traveling through 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. Specifically, as shown in FIG. 1, the infeed unit I3 includes an infeed roller 12, a paper pressing rubber roller 13 in contact with the infeed roller 12, a swingable dancer roller 14, a guide roller 15, and the like. The infeed roller 12 is connected to a drive source (not shown). Then, by urging the dancer roller 14 in the tensioning direction of the web W by an air cylinder (not shown), the tension of the web W is set to an appropriate value, and a swing position of the dancer roller 14 is detected by a sensor (not shown), and the web W of the dancer roller 14 is detected. The appropriate tension of the web W is maintained by changing the peripheral speed of the infeed roller 12 by the drive source in accordance with the loosening direction or the swinging in the tension direction.

  Note that 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. Further, as shown in FIG. 2, a drag roller 16 that can be driven and rotated by a drive source is provided on the downstream side of the printing apparatus U, and based on the detection result of a tension detection sensor provided in the printing apparatus U. The peripheral speed of the drag roller 16 and the urging force of the dancer roller 14 by the air cylinder are controlled.

  Note that the optimum tension of the web W in the sheet feeding device R, the infeed device I, the printing device U, and the like is generally set according to the width of the web W. The roll paper (web W) generally includes volume A, volume C, volume D, volume F, and the like. Volume A has a width of 1626 mm and is 4 pages wide in a newspaper. Volume C has a width of 1219 mm and is 3 pages wide in a newspaper. Volume D has a width of 813 mm and is the width of two pages in a newspaper (half of volume A). Volume F has a width of 407 mm and is the width of one page in a newspaper. For example, the optimum tension of the web W from the paper feeding device R to the infeed device I in the winding paper of A is 25 to 30 kgf, and the optimum tension of the web W in the printing device U downstream from the infeed device I. Is 80-100 kgf. The optimum tension of the web W is about 3/4 for the C winding paper, 1/2 for the D winding paper, and 1/4 for the F winding paper.

  Returning to FIG. 2, in the printing apparatus U, the printing units U <b> 1 to U <b> 6 are multicolor printing units capable of performing double-sided four-color printing. However, each printing unit U1-U6 can be made into the printing units U11-U62 which can perform double-sided two-color printing by dividing | segmenting up and down. Each of the printing units U11 to U62 has substantially the same configuration, and includes an ink supply device (not shown), a plate cylinder 17, and a blanket cylinder 18. In this case, the peripheral length (diameter) of the plate cylinder 17 and the peripheral length (diameter) of the blanket cylinder 18 are set to the same diameter in each printing unit U1 to U6. That is, on the peripheral surface of the plate cylinder 17, one printing plate (not shown) is provided along the circumferential direction (vertical length direction of the web W), and four printing plates are provided along the axial direction (width direction of the web W). The plate is removable.

  In the present embodiment, the printing units U1 to U6 are all configured by multicolor printing units, but are 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 according to the printed matter.

  In the web pass apparatus 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.

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

  In the folding machine F, the two folding units F1 and F2 are arranged on the operation side and the drive side. Accordingly, when a plurality of webs W1 are introduced by being overlapped from the web pass unit D1, the folding unit F1 vertically folds the web W, transversely cuts it at a predetermined length, and then horizontally folds 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 W, horizontally cuts it at 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. .

  In the newspaper offset rotary printing press of the present embodiment, a ground processing device G for supplying a ground processing agent to the web W before printing is provided between the paper feeding device R and the infeed device I. Yes. In this case, in the paper feeding device R, the paper feeding units R1 to R7 are arranged side by side on the floor, and in the infeed device I, the infeed units I1 to I7 are arranged above the paper feeding units R1 to R7. The ground processing apparatus G is disposed on the same floor surface as the sheet feeding units R1 to R7, and is disposed between the sheet feeding units R3 and R4.

  The ground processing apparatus G transfers, for example, white ink as a ground processing agent to a predetermined position on the web W, and ensures high printed picture quality by printing on the white ink. It is. However, when printing a newspaper, there are cases where a base treatment agent is transferred to the web W and may not be transferred. Therefore, in this embodiment, the web W from the paper feed unit R3 is sent to the infeed unit I3 via the ground processing apparatus G, and the web W from the paper feed unit R3 is directly connected to the infeed unit I3. It is possible to switch to the second transport line sent to In this case, since the ground processing device G is disposed on the side of the paper feeding unit R3, the paper is fed to the paper feeding unit R3, the ground processing device G, the infeed unit I3, the paper feeding unit R3, the infeed. It is possible to easily switch the paper threading to the unit I3.

  Here, the ground processing apparatus G will be described in detail.

  As shown in FIG. 1, the ground treatment apparatus G includes a ground treatment agent storage chamber 21, a ground treatment agent supply roll 22, a ground treatment agent transfer roll 23, and a guide roll 24. The base treatment agent storage chamber 21 can store the base treatment agent therein. The surface treatment agent supply roll 22 is configured by a metal anilox roll having a large number of recesses on the outer peripheral surface, and the recesses are formed by helical grooves inclined by a predetermined angle with respect to the roll axis direction. The outer peripheral surface is formed in parallel over the entire circumference. The surface treatment agent supply roll 22 is disposed so as to cover an opening (not shown) formed in the front surface portion of the surface treatment agent storage chamber 21, so that the excess surface treatment agent remaining in the helical groove during rotation is removed from the surface. While being collected in the processing agent storage chamber 21, the base processing agent in the base processing agent storage chamber 21 is supplied to the helical groove.

  The ground treatment agent transfer roll 23 is a rubber roll made of an elastic body, is in contact with the ground treatment agent supply roll 22, and the ground treatment agent is supplied to the outer peripheral surface from the ground treatment agent supply roll 22. The guide roll 24 is a metal roll, and is in contact with the surface treatment agent transfer roll 23 with the web W interposed therebetween, and a predetermined nip pressure is set between both the rolls 23 and 24. In this case, the base treatment agent supply roll 22, the base treatment agent transfer roll 23, and the guide roll 24 can be driven and rotated in synchronization with a driving device (not shown). The guide roll 24 is provided with a tension detection sensor (not shown) for measuring the tension of the web W.

  In this embodiment, the axial lengths of the rolls 22, 23, and 24 are substantially the same as the axial lengths of the plate cylinder 17 and the blanket cylinder 18 of each printing unit U1 to U6, The ground treatment agent can be transferred to all pages of the web W. However, the present invention is not limited to this configuration. For example, the surface treatment agent can be supplied to only one page (or two pages, three pages) with respect to the web W having the A roll width or D roll width. Therefore, the length in the axial direction of each of the rolls 22, 23, and 24 may be a length corresponding to one page in the web W having the A winding width or the D winding width.

  Accordingly, when the substrate treating agent supply roll 22 is rotated by the driving device, the substrate treating agent supply roll 22 receives the substrate treating agent in the substrate treating agent storage chamber 21 and supplies it to the substrate treating agent transfer roll 23. The ground treatment agent transfer roll 23 can transfer the ground treatment agent to a predetermined position (page) on the printing surface of the web W traveling between the guide roll 24.

  Further, in order to allow partial supply of the surface treatment agent to one page (or page 2, page 3, page 4) of the web W having a predetermined width, the surface treatment agent transfer roll 23 is used as a plate cylinder. A transfer portion and a non-transfer portion may be formed.

  In the ground treatment apparatus G, a ground treatment agent storage tank 25 that stores the ground treatment agent supplied to the ground treatment agent storage chamber 21, and a ground treatment agent that stores the ground treatment agent recovered from the ground treatment agent storage chamber 21. A recovery tank 26 is provided. The ground treatment agent storage tank 25 is connected to a replenishment tank 28 via a replenishment path 27, and a replenishment pump 29 is attached to the replenishment path 27. The replenishing tank 28 is connected to the ground treatment agent storage chamber 21 through a supply path 30, and a supply pump 31 and a heater 32 are provided in the supply path 30. A bypass path 33 is connected between the replenishment path 27 and the supply path 30.

  On the other hand, the base treatment agent recovery tank 26 is connected to the base treatment agent storage chamber 21 via a recovery path 34. In this case, the interior of the surface treatment agent storage chamber 21 is formed in two layers, the supply path 30 is connected to the supply tank, and the recovery path 34 is connected to the recovery layer.

  Accordingly, when the supply pump 31 is driven, the surface treatment agent in the replenishing tank 28 can be sucked up and supplied to the surface treatment agent storage chamber 21 through the supply path 30. At this time, the base treatment agent flowing through the supply path 30 is heated to an appropriate temperature by the heater 32. Further, surplus surface treatment agent in the surface treatment agent storage chamber 21 can be returned to the replenishment tank 28 by the bypass path 33. In this case, the ground surface treatment agent is circulated through the replenishment tank 28, the supply path 30, the bypass path 33, and the replenishment path 27, so that the ground surface treatment agent having an appropriate temperature by the heater 32 can be used efficiently.

  The base treatment agent storage tank 25 can store the base treatment agent therein, and can store a larger amount (for example, 5 to 10 times the storage amount) of the base treatment agent than the replenishment tank 28. When the surface treatment agent in the surface treatment agent storage chamber 21 is used and the storage amount of the surface treatment agent in the replenishment tank 28 decreases, the replenishment pump 29 is driven to suck up the surface treatment agent in the surface treatment agent storage tank 25 and replenishment path. 27, the surface treatment agent can be replenished to the replenishment tank 28.

  Further, in the ground processing apparatus G, the ground processing agent is disposed adjacent to the ground processing agent supply unit 20 including the ground processing agent storage chamber 21, the ground processing agent supply roll 22, the base processing agent transfer roll 23, the guide roll 24, and the like. An agent drying device 41 is arranged. The ground treatment agent drying apparatus 41 dries the ground treatment agent transferred to the printing surface of the web W, and is configured as a heating device that heats and drys the ground treatment agent. In the present embodiment, the ground treatment agent drying device 41 is a warm air method for drying the ground treatment agent by blowing warm air onto the printing surface of the web W. Therefore, a supply pipe 43 that supplies hot air from the heater 42 and a recovery pipe 44 that recovers and reuses the blown hot air are provided.

  As described above, in this embodiment, the web W from the paper feed unit R3 is fed to the infeed unit I3 via the ground processing apparatus G, and the web W from the paper feed unit R3 is A second conveyance line that is directly sent to the infeed unit I3 is provided, and can be selectively used according to the printing form. In this case, a plurality of guide rollers 51 for guiding the web W are arranged along the path from the paper feed unit R3 to the in-hood unit I3. In addition, a plurality of guide rollers 52 and 53 for guiding the web W are arranged on a path that bypasses the substrate processing apparatus G and reaches the infeed unit I3. A guide roller 54 is disposed at a switching portion between a path from the paper feed unit R3 to the in-hood unit I3 and a path from the ground processing apparatus G to the infeed unit I3.

  Further, in the first conveyance line that is bypassed the substrate processing apparatus G and is sent to the infeed unit I3, the substrate W is applied to the descending line in which the web W is conveyed downward by the plurality of guide rollers 52 from the sheet feeding unit R3 side. A processing agent supply unit 20 is disposed. On the other hand, the web W supplied with the surface treatment agent by the surface treatment agent supply unit 20 is reversed, and the surface treatment agent drying device 41 is arranged on the rising line conveyed upward by the plurality of guide rollers 52. .

  By the way, in the web offset press for newspapers of this embodiment, the ground processing apparatus G supplies (transfers) the ground processing agent to the web W and dries the ground processing agent. Wrinkles are likely to enter the area where the surface treatment agent is transferred. For this reason, the substrate processing apparatus G forms a web W before printing by the printing apparatus U (printing unit U3) between the sheet feeding apparatus R (paper feeding unit R3) and the infeed apparatus I (infeed unit I3). On the other hand, the surface treatment agent is supplied.

  And this ground processing apparatus G is a roll part which transfers a ground processing agent and supplies it to the web W, and the ground processing agent supply roll 22, the ground processing agent transfer roll 23, and the guide roll 24 synchronize with a drive device. Drive rotation is provided. Therefore, the web W conveyed from the paper feed unit R3 through the ground processing device G to the printing unit U3 from the infeed unit I3 is supplied with the brake of the paper feed unit R3, the ground treatment agent transfer roll 23 of the ground processing device G, The tension can be adjusted by the feed unit I3.

  In this embodiment, the tension of the web W in the ground treatment agent transfer roll 23 of the ground treatment apparatus G (the ground treatment agent supply unit 20) is equal to the tension of the web W in the paper feed unit R3, and the infeed unit I3. It is set lower than the tension of the web W given in.

  That is, as described above, when printing is performed by each of the printing units U1 to U6 of the printing apparatus U, maintaining the tension in the transport direction in the web W at an appropriate value and constant ensures high print quality. It has become important. Therefore, the tension in each of the printing units U1 to U6 can be adjusted by each of the infeed units I1 to I7 of the infeed apparatus I.

  On the other hand, in the ground treatment device G disposed upstream of the infeed unit I3 of the infeed device I, the web W is supplied with an aqueous ground treatment agent and dried. The paper fiber once swells and then contracts. Therefore, when the above-described state change occurs when the web W is in a high tension state, the web W changes in the high tension in the transport direction, and the high tension change in the transport direction acts in the width direction, and the web W is moved along the transport direction. Wrinkles are likely to occur.

  Therefore, in this embodiment, on the upstream side of the infeed unit I3, in addition to the infeed unit I3, the tension of the web W is adjusted by the brake of the paper feeding unit R3 and the ground treatment agent transfer roll 23 of the ground processing device G. Since it is possible, the tension of the web W in the paper feed unit R3 and the substrate processing apparatus G is set lower than the tension of the web W in the printing unit U3.

  In this embodiment, since the tension of the web W can be adjusted by the paper feed unit R3, the ground treatment agent transfer roll 23, and the infeed unit I3, the area from the paper feed unit R3 to the ground treatment agent transfer roll 23 is adjusted. The tension of the web W in A1, the area A2 from the base agent transfer roll 23 to the infeed unit I3, and the area A3 of the printing unit U3 after the infeed unit I3 is adjusted to an appropriate value.

  The optimum tension of the web W in each of the areas A1, A2, and A3 is set according to the width (winding width) of the web W. Specifically, the optimum tension in the area A3 (printing unit U3) is 80 to 100 kgf and the optimum in the area A1 (from the paper feeding unit R3 to the ground treatment agent transfer roll 23) with the web W having A winding width. The optimum tension is 25 to 30 kgf, and the optimum tension in the region A2 (from the ground treatment agent transfer roll 23 to the infeed unit I3) is almost the same as that in the region A and is at least in the range of 10 to 50 kgf. Is desirable.

  In the present embodiment, the tension of the web W in the region A2 (from the ground treatment agent transfer roll 23 to the infeed unit I3) is set lower than the tension of the web W in the region A3 (printing unit U3). When the ground treatment agent G is supplied with the ground treatment agent and dried, the web W is subjected to tension in the transport direction because the fibers of the paper swell and contract. Tension fluctuation acts in the width direction. However, since the web W is set to have a low tension in the conveyance direction, when the fluctuation in the tension in the conveyance direction acts in the width direction, the fluctuation in the tension in the width direction becomes small. As a result, the wrinkle along the conveyance direction is reduced. The occurrence of this will be suppressed.

  Further, in this embodiment, a plurality of guide rollers 53 and 54 are disposed on the downstream side of the surface treatment agent transfer roll 23 in the surface processing apparatus G and up to the infeed unit I3. , 54 is provided with a wrinkle suppressing member corresponding to the surface treatment agent supply boundary in the web W.

  That is, as shown in FIG. 3, for example, in the guide roller 53, support shafts 61a and 61b at axial end portions are rotatably supported on the left and right frames 63a and 63b via bearings 62a and 62b. The guide roller 53 is capable of guiding the web W having a width A. A web W having a width A can be printed on a plurality of pages (four pages in this embodiment) in the width direction by the printing unit U3, and includes five boundary portions Wa along the transport direction including the end portions in the width direction. , Wb, Wc, Wd, and We exist. The guide roller 53 is provided with a protrusion 64 as a wrinkle suppressing member corresponding to the boundary portions Wa, Wb, Wc, Wd, We of each page on the outer peripheral surface. Each protrusion 64 is provided at a predetermined position on the outer peripheral surface of the guide roller 53 so as to protrude outward over the entire circumference. Specifically, the guide roller 53 has a protrusion 64 formed by applying a tape having a predetermined thickness over the entire circumference at positions corresponding to the boundary portions Wa, Wb, Wc, Wd, and We on the outer peripheral surface. ing. Further, the protrusion 64 may be formed by machining the outer peripheral surface of the guide roller 53.

  Therefore, when the web W on which the surface treatment agent has been transferred is guided and conveyed by the plurality of guide rollers 53, each of the boundary portions Wa, Wb, Wc, Wd, and We contacts each protrusion 64. Then run. Therefore, the web W is pushed in the outward direction by the projections 64 by the respective boundary portions Wa, Wb, Wc, Wd, and We, whereby the tension in the width direction between the respective boundary portions Wa, Wb, Wc, Wd, and We. Will act and suppress the generation of wrinkles.

  The guide rollers 53 and 54 having the wrinkle suppressing member are not limited to such a configuration. When the ground processing apparatus G supplies the ground processing agent for only one page of the web W having the A winding width, the convex portions need only be provided at positions corresponding to the boundary portions on both sides of the corresponding page. That is, as shown in FIG. 4, the guide roller 53A is provided with a protrusion 65 as a wrinkle suppressing member corresponding to only the boundary portions Wb and Wc of a predetermined page on the outer peripheral surface.

  Further, when the substrate processing apparatus G supplies the substrate processing agent to one page or all pages in the web W having the A winding width, it is only necessary to provide convex portions at positions corresponding to the boundary portions on both sides of the web W. That is, as shown in FIG. 5, the guide roller 53B has a protrusion 66 as a wrinkle suppressing member corresponding to only the boundary portions Wa and We on the outer peripheral surface by forming the outer peripheral surface in an inverted crown shape. A region corresponding to the web W is a recess 67.

  As described above, the wrinkle suppressing member of the present embodiment may be appropriately set in accordance with the width of the web W, the supply position of the surface treatment agent, and the forming method is also provided on the outer peripheral surface of the guard roller. A tape or the like may be attached, or the outer peripheral surface of the guide roller may be machined.

  Here, the printing operation by the above-described newspaper offset rotary printing press of this embodiment will be described.

  As shown in FIGS. 1 and 2, the webs W respectively supplied from the paper feeding units R <b> 1 to R <b> 7 of the paper feeding device R are fed from the infeed device I in the newspaper offset rotary printing press according to the present embodiment. The tension is adjusted by the infeed units I1 to I7 and supplied to the printing units U1 to U6 of the printing apparatus U. Here, when the background processing is performed on the web W supplied from the paper supply unit R3, the web W is conveyed to the infeed unit I3 via the background processing device G, and supplied to the printing unit U3 after the tension is adjusted. Is done.

  In the surface treatment agent supply unit 20 of the surface treatment apparatus G, the surface treatment agent storage chamber 21 is filled with the surface treatment agent, and when the surface treatment agent supply roll 22 rotates, the surface treatment agent supply roll 22 The substrate processing agent is received from the processing agent storage chamber 21 and supplied to the substrate processing agent transfer roll 23, and the substrate processing agent transfer roll 23 transfers the substrate processing agent to the web W traveling between the guide roller 24. . In this case, the ground treatment agent transfer roll 23 transfers the ground treatment agent only to a predetermined page on the web W.

  The web W on which the surface treatment agent is transferred by the surface treatment agent supply unit 20 is guided by the guide roller 53 and conveyed to the surface treatment agent drying device 41. In the ground treatment agent drying apparatus 41, the ground treatment agent is heated and dried by blowing warm air onto the surface of the web W on which the ground treatment agent is transferred. Then, the web W from which the surface treatment agent has been dried is conveyed to the in-feed unit I3, and after the tension is adjusted, is supplied to the printing unit U3.

  When the ground treatment apparatus G performs the ground treatment supply process and the ground treatment drying process on the web W, the tension of the web W is set to be low. Therefore, even if the web W expands and contracts and the tension varies, the tension variation acting in the width direction of the web W is reduced, and the generation of wrinkles along the transport direction is suppressed.

  Further, when the web W on which the surface treatment agent is transferred is conveyed to the infeed unit I3 through the surface treatment agent drying device 41, the surface of the web W on which the surface treatment agent is transferred is the guide rollers 53, 54. Be guided to. Each of the guide rollers 53 and 54 has a protrusion 64 corresponding to each of the boundary portions Wa, Wb, Wc, Wd, and We of the web W. Therefore, the web W on which the surface treatment agent is transferred is guided and conveyed by the guide rollers 53 and 54, so that the boundary portions Wa, Wb, Wc, Wd, and We are moved outward by the protrusions 64. By being pushed out, a tension in the width direction acts, and in particular, the generation of wrinkles at a portion where the surface treatment agent is transferred is suppressed.

  Then, color printing is performed on both surfaces of each web W in each printing unit U1-U6 in the printing apparatus U. At this time, in the printing unit U3, printing is performed on the dried surface treatment agent on the printing surface of the web W. As a result, the surface of the web W having a low whiteness is processed to have a high whiteness with the base treatment agent (white ink), and a full-color photograph or advertisement is printed without causing turbidity in the printing ink. Therefore, it becomes possible to realize printing of a color tone desired to be reproduced using a high whiteness background.

  Each web W printed by each printing unit 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 of the webs W printed by the printing units U4 to U6 is vertically cut by a slitter in the web pass unit D2, is changed by a turn bar, a transfer path is changed, and a transfer position is adjusted by a compensator. They are stacked in order.

  After that, 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 W, 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 W, horizontally cuts it at a predetermined length, and then horizontally folds to form a fold. The paper is discharged as a newspaper.

  As described above, in the newspaper offset rotary printing press according to the present embodiment, the paper feeding device R that supplies the web W from the web, and the infeed device I that applies tension to the web W fed out from the paper feeding device R. And a printing apparatus U that performs printing on the web W to which tension is applied by the infeed apparatus I, and a folding machine F that forms a fold by overlapping and folding a plurality of webs W that have been printed by the printing apparatus U. And a ground processing device G for supplying a ground processing agent to the web W before printing between the paper feeding device R and the infeed device I.

  Therefore, when the tension of the web W on the printing apparatus U side is adjusted to an appropriate value by the infeed device I, the tension of the web W on the substrate processing apparatus G side can be set lower than the appropriate value, and the tension is reduced. The ground treatment agent is supplied to the web W in a low state and dried, and the fluctuation in tension acting at this time can be minimized and the generation of wrinkles on the web W can be suppressed. The quality can be improved.

  Further, in the web offset press for newspapers of this embodiment, as the ground processing device G, a ground processing agent supply roll 22, a ground processing agent transfer roll 23, and a guide roll 24 that transfer the ground processing agent and supply it to the web W are provided. The web W tension in the ground treatment agent transfer roll 23 is equal to the tension of the web W in the sheet feeding device R and is adjusted by the infeed device I. It is set lower. Accordingly, the tension of the web W can be adjusted by the ground treatment agent transfer roll 23, and the web W in the ground processing apparatus G is made equal to the tension of the web W in the paper feeding device R here. It is possible to further reduce the tension of the web W, and appropriately suppress the generation of wrinkles in the web W.

  Further, in the newspaper offset rotary printing press of this embodiment, a plurality of paper feeding units R1 to R7 are arranged in parallel on the floor as the paper feeding device R, and each of the paper feeding units R1 to R7 is provided as an infeed device I. A plurality of infeed units I1 to I7 are disposed above, the ground processing device G is disposed on the floor surface between the paper feeding units R1 to R7, and the web W from the paper feeding unit R3 disposes the ground processing device G. The first transfer line sent to the infeed unit I3 via the first feed line and the second feed line sent directly from the paper feed unit R3 to the infeed unit I3 can be switched. Accordingly, the conveyance line can be easily switched between the case where the ground processing is performed on the web W and the case where the ground processing is not performed, so that the workability of the printing work can be improved and the ground processing device G is connected to each of the paper feeding units R1 to R1. By arranging it side by side with R7, it becomes possible to arrange efficiently, and the enlargement of the whole printing press can be suppressed.

  Further, the newspaper offset rotary printing press of this embodiment is provided with a drying device 41 that dries the ground treatment agent supplied to the web W by the ground treatment device G. Therefore, the ground treatment agent drying device 41 can dry the ground treatment agent at an early stage, and the generation of wrinkles in the web W can be appropriately suppressed.

  Further, in the web offset press for newspapers of the present embodiment, the ground treatment agent supply unit 20 is disposed on the descending line in which the web W from the paper feeding unit R3 is conveyed downward in the first conveying line. The drying device 41 is arranged on the rising line where the web W supplied with the ground treatment agent is reversed and conveyed upward. Therefore, by efficiently arranging the base treatment agent supply unit 20 and the base treatment agent drying device 41, it is possible to suppress an increase in the size of the entire printing press.

  In the newspaper offset rotary printing press of the present embodiment, guide rollers 53 and 54 (53A and 53B) for guiding the web W conveyed from the substrate processing apparatus G to the infeed apparatus I are provided. Projections 64 (65, 66) are provided on the surface of 54 as wrinkle suppression members corresponding to the boundary portions (substrate treatment agent supply boundaries) Wa to We in the web W. Therefore, when the convex portions 64 of the guide rollers 53 and 54 come into contact with the boundary portions Wa to We of the web W, the web W is maintained in the tension in the width direction, and the generation of wrinkles can be suppressed.

  Further, in the newspaper rotary offset printing press of this embodiment, the base treatment agent in which the guide rollers 53 and 54 (53A and 53B) having the protrusions 64 (65 and 66) are arranged on the downstream side of the base treatment apparatus G is provided. It is arranged downstream of the drying device 41. Accordingly, the web W is guided by the guide rollers 53 and 54 when the water of the ground treatment agent evaporates by the ground treatment agent drying device 41 and contracts, whereby the web W is maintained in tension in the width direction by the protrusion 64. Thus, the generation of wrinkles can be effectively suppressed.

  In the web offset press of the present embodiment, a plurality of pages can be printed on the web W in the width direction by the printing apparatus U, and the protrusions 64 (65, 66) are connected to the boundary portions Wa to Wa of each page. It is provided corresponding to We. Therefore, the protrusion 64 supports the web W without coming into contact with the printing surface, so that the generation of dirt on the printing surface of the web W can be prevented, and the surface treatment agent is supplied to which page. In addition, the generation of wrinkles in the web W can be appropriately suppressed.

  Further, in the newspaper offset rotary printing press according to the present embodiment, the protrusion 64 (65, 66) is placed at a predetermined axial position on the outer peripheral surface of the guide rollers 53, 54 (53A, 53B). Projecting outward. Therefore, with a simple configuration in which protrusions along the circumferential direction are provided on the outer peripheral surfaces of the guide rollers 53 and 54, the generation of wrinkles in the web W can be suppressed, and the apparatus can be simplified.

  In each of the embodiments described above, the protrusion 64 (65, 66) as a wrinkle suppressing member is provided at a predetermined position on the outer peripheral surface of the guide rollers 53, 54 (53A, 53B). The shape may be any shape as long as a part of the outer diameter of the outer peripheral surface is larger than that of the peripheral portion, and may be any shape such as a stepped shape, a tapered shape, or an inverted crown shape.

  Further, in each of the above-described embodiments, as the ground treatment device G, the ground treatment agent drying device 41 is provided on the downstream side of the ground material supply unit 20, but the material is dried early according to the type of the ground treatment agent to be used. If so, the base treatment agent drying apparatus 41 may be omitted.

In each of the above-described embodiments, guide rollers 53 and 54 (53A and 53B) for guiding the web W conveyed from the substrate processing apparatus G to the infeed apparatus I are provided, and wrinkles are formed on the surfaces of the guide rollers 53 and 54. Although the suppression member is provided, it is not limited to this configuration. For example, in addition to this configuration, a guide roller for guiding the web W conveyed to the downstream side of the infeed device I may be provided, and a wrinkle suppressing member may be provided on the surface of the guide roller. In this case, after the web W is applied with tension by the infeed device I, the wrinkle suppression member of the guide roller comes into contact with the ground treatment agent supply boundary in the web W, so that the generation of wrinkles can be suppressed.

  Moreover, in each Example mentioned above, although one base-surface processing apparatus G was arrange | positioned along with several paper-feeding unit R1-R7 arrange | positioned on the 1st floor of a building with the offset rotary printing press for newspapers, It is not limited to. For example, the base processing apparatus G may be arranged side by side in the printing units U1 to U6 and U11 to U62. In this case, the number of base processing apparatuses G is not limited to one, and two or more base processing apparatuses G may be arranged. The position may be any position, and the number and the position may be appropriately arranged according to the transport position of the web W that supplies the base treatment agent.

  In each of the above-described embodiments, the printing press of the present invention has been described as applied to a newspaper offset rotary printing press, but it can also be applied to a general printing press such as a commercial offset printing press.

  The printing press according to the present invention is provided with a ground processing device between the paper feeding device and the infeed device, thereby improving the printing quality by suppressing the generation of wrinkles during the supply of the base processing agent or during drying. It can be applied to any 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 G Ground treatment equipment 20 Ground treatment agent supply part (roll part)
21 Ground treatment agent storage chamber 22 Ground treatment agent supply roll 23 Ground treatment agent transfer roll 24 Guide roll 53, 53A, 53B Guide roller 64, 65, 66 Protrusion (wrinkle suppression member)
W Web

Claims (10)

A paper feeding device for feeding a web from a web,
An infeed device for applying tension to the web fed from the paper feeding device;
A printing device for printing on a web to which tension is applied by the infeed device;
A folding machine that folds a plurality of webs printed by the printing device to form a fold;
A ground treatment device for supplying a ground treatment agent to the web before printing between the paper feeding device and the infeed device;
A printing machine comprising:   The substrate treatment apparatus includes a roll unit that transfers the substrate treatment agent and supplies the web to the web, and a driving device that drives and rotates the roll unit. The tension of the web in the roll unit is the web in the sheet feeding device. The printing press according to claim 1, wherein the printing press is set lower than the tension of the web applied by the infeed device.   The paper feeding device has a plurality of paper feeding units arranged side by side, and the infeed device has a plurality of infeed units arranged on the downstream side of the plurality of paper feeding units. The apparatus is disposed between the plurality of sheet feeding units, and a first conveyance line through which a web from the sheet feeding unit is sent to the infeed unit via the ground processing apparatus, and a web from the sheet feeding unit The printing press according to claim 1 or 2, characterized in that can be switched to a second transport line that is sent directly to the infeed unit.   The printing machine according to any one of claims 1 to 3, further comprising a drying device that dries the surface treatment agent supplied to the web by the surface treatment device.   In the first transport line, a ground treatment agent supply unit is disposed on a descending line in which the web from the paper feeding unit is transported downward, while the web supplied with the ground treatment agent is reversed and moved upward. The printing machine according to claim 3, wherein the drying device is disposed in a rising line that is conveyed toward the front.   A guide roller for guiding a web conveyed from the ground treatment device to the infeed device is provided, and a wrinkle suppression member is provided on a surface of the guide roller corresponding to a ground treatment agent supply boundary in the web. A printing machine according to any one of claims 1 to 5.   A guide roller for guiding a web conveyed downstream of the infeed device is provided, and a wrinkle suppressing member is provided on the surface of the guide roller corresponding to a ground treatment agent supply boundary in the web. The printing machine according to claim 6.   The printing machine according to claim 6 or 7, wherein the guide roller having the wrinkle suppressing member is disposed on the downstream side of a drying device disposed on the downstream side of the substrate processing apparatus.   9. The web according to claim 6, wherein a plurality of pages can be printed in the width direction by the printing device, and the wrinkle suppressing member is provided corresponding to a boundary between the pages. The printing machine described in.   10. The wrinkle suppressing member is provided at a predetermined position in the axial direction on the outer peripheral surface of the guide roller so as to protrude outward over the entire circumference in the circumferential direction. Printing machine.

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