JP2010089420A - Base coat agent applying apparatus, rotary printing machine, and base coat agent applying method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a base coat agent applying apparatus or the like which can suitably apply a base coat agent to a web. <P>SOLUTION: The base coat agent applying apparatus includes a plate cylinder 34 and an impression cylinder 35 which can apply the base coat agent on the surface of the web W conveyed, and a cooling part 31 provided in the impression cylinder 35 so that an uncoating face being an opposite face of a coated face of the web W coated with the base coat agent is cooled at about the same time when the base coat agent is applied by the plate cylinder 34 and the impression cylinder 35, and in the cooling part 31, cooling water is passed through in the impression cylinder 35. It is possible thereby to cool the base coat agent by cooling the uncoated face of the web W, and as the viscosity of the base coat agent can be increased, the base coat agent hardly soaks into the web W. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a base agent coating apparatus, a rotary printing machine, and a base agent coating method capable of applying a base agent to continuous paper to be conveyed.

  2. Description of the Related Art Conventionally, as this type of base material application device, there is known an offset printing machine that transfers a base treatment agent made of white ink onto a printing surface of newsprint (for example, see Patent Document 1). Specifically, in this offset printing machine, after the surface treatment agent is transferred to the printing surface of the newsprint, the surface treatment agent on the printing surface is dried, and then the ground treatment agent is offset to the printing surface of the newsprint that has been dried. Printing is in progress.

JP 2008-30552 A

  However, in a conventional offset printing machine, for example, when a base treatment agent is transferred to one side of a newsprint, the base treatment agent penetrates from the transfer surface into the newsprint and moves to the opposite side of the transfer surface. There is a fear. Further, if the ground treatment agent is transferred to the opposite surface of the transfer surface, the ground treatment agent that should remain on the transfer surface is insufficient. At this time, since the surface treatment agent functions as a seal that fills the gaps between the fibers of the newsprint, if the surface treatment agent on the transfer surface is insufficient, the function as a seal will be reduced. There is a fear. As a result, offset printing is not suitably performed on the newsprint after the base treatment, and print quality may be deteriorated.

  Then, this invention makes it a subject to provide the base agent coating apparatus, rotary printing machine, and base agent coating method which can apply | coat a base agent suitably with respect to continuous paper.

  The base agent coating apparatus of the present invention includes a pair of printing cylinders capable of applying the base agent to at least one of the front and back surfaces of the continuous paper to be conveyed, and the application of the base agent by the pair of printing cylinders. And a non-application surface cooling means capable of cooling the non-application surface which is the opposite surface of the application surface of the continuous paper coated with the base agent.

  In this case, it is preferable that the image forming apparatus further includes a drying unit that can dry the continuous paper after applying the base agent, and the non-application surface cooling unit is disposed upstream of the drying unit in the conveying direction of the continuous paper. .

  In these cases, one of the pair of printing cylinders is composed of a plate cylinder and the other is composed of an impression cylinder, and the base agent can be applied to the front or back surface of the continuous paper. The means preferably cools the impression cylinder.

  In this case, it is preferable that the non-application surface cooling means has a water passing means for passing cooling water inside the impression cylinder.

  In this case, it is preferable that the non-application surface cooling means has a cooling roller that can be brought into rolling contact with the impression cylinder and can cool the impression cylinder.

  In this case, the non-application surface cooling means has a cooling roller that is in rolling contact with the non-application surface of the continuous paper. It is preferable that it is disposed in the vicinity of the downstream side in the paper transport direction.

  In this case, the non-application surface cooling means has a ventilation means capable of ventilating air to the non-application surface of the continuous paper, and the ventilation means is at least upstream of the pair of printing cylinders in the conveyance direction of the continuous paper. It is preferable that it is disposed in the vicinity or in the vicinity of the downstream side in the conveyance direction of the continuous paper.

  In this case, the humidity detection means capable of detecting the humidity inside the apparatus and the cooling by the non-application surface cooling means so that the cooling temperature by the non-application surface cooling means does not become a temperature at which condensation can occur with respect to the detected humidity. It is preferable to include a cooling temperature control means capable of controlling the temperature.

  A rotary printing press according to the present invention includes the above base agent coating apparatus and a printing apparatus capable of printing on continuous paper after the base agent is applied.

  In the base agent coating method of the present invention, the base agent is applied in the same manner as the base agent application step of applying the base agent to at least one of the front surface and the back surface of the conveyed continuous paper, and the base agent application step. A non-application surface cooling step for cooling the non-application surface that is the opposite surface of the application surface of the continuous paper.

  According to the base agent coating apparatus of claim 1, the rotary printing press of claim 9, and the base agent coating method of claim 10, the non-coating surface of the web is cooled by the non-coating surface cooling means (non-coating surface cooling step). be able to. That is, when the non-coated surface is cooled, the base agent can be cooled via the continuous paper. At this time, the viscosity of the base agent changes with temperature. Specifically, when the base agent is cooled, the viscosity of the base agent can be increased. For this reason, when the base agent applied to the continuous paper is cooled via the continuous paper, the continuous paper side of the base agent becomes difficult to penetrate into the continuous paper due to high viscosity, and remains on the coated surface. Become. Thereby, a base agent does not set off to a non-application surface. In addition, since the base agent remains on the coated surface, it can function suitably as a seal. Further, since absorption of excess base material with respect to continuous paper can be suppressed, wrinkles and the like generated on continuous paper can be suppressed.

  According to the base agent coating apparatus of the second aspect, the base agent can be dried by the drying means in a state where the base agent remains on the application surface of the continuous paper. Thereby, a base agent can be dried suitably and a base treatment can be performed favorably with respect to continuous paper.

  According to the base material coating apparatus of the third aspect, one of the pair of printing cylinders is constituted by a plate cylinder and the other is constituted by an impression cylinder, and the impression cylinder can be cooled by the non-application surface cooling means. As a result, the continuous paper is cooled at the same time as the application of the base material by the plate cylinder, so that the base material can be satisfactorily kept on the coated surface.

  According to the base agent coating apparatus of the fourth aspect, the pressure drum can function as a cooling roller by passing cooling water through the pressure drum. Thereby, it is not necessary to change an apparatus structure significantly, and a non-application surface cooling means can be made into a simple structure.

  According to the base material coating apparatus of the fifth aspect, the impression cylinder can be cooled by rolling the cooling roller to the impression cylinder. Thereby, it is not necessary to change the configuration of the impression cylinder, and the non-application surface cooling means can have a simple configuration.

  According to the base material coating apparatus of claim 6, the cooling roller is disposed in the vicinity of the upstream side of the pair of printing cylinders so that the cooling roller cools the non-coated surface of the continuous paper immediately before the base material is applied. be able to. Further, by disposing the cooling roller in the vicinity of the downstream side of the pair of printing cylinders, the cooling roller can cool the non-application surface of the continuous paper immediately after the base material is applied. For this reason, it becomes possible to improve the freedom degree of arrangement | positioning of a non-application surface cooling means.

  According to the base agent coating apparatus of the seventh aspect, by providing the ventilation means in the vicinity of the upstream side of the pair of printing cylinders, the ventilation means cools the non-application surface of the continuous paper immediately before applying the base agent. be able to. Further, by arranging the ventilation means in the vicinity of the downstream side of the pair of printing cylinders, the ventilation means can cool the non-application surface of the continuous paper immediately after the base agent is applied. For this reason, it becomes possible to improve the freedom degree of arrangement | positioning of a non-application surface cooling means.

  According to the base agent coating apparatus of the eighth aspect, the dew condensation generated from the non-coating surface cooling means can be suppressed, so that the continuous paper can be prevented from being broken by the dew condensation.

  Hereinafter, with reference to the attached drawings, a rotary printing machine to which a base agent coating apparatus according to the present invention is applied will be described. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily replaced by those skilled in the art or those that are substantially the same.

  Here, FIG. 1 is a schematic configuration diagram illustrating a part of a newspaper offset rotary printing press according to the first embodiment, and FIG. 2 is a schematic configuration diagram illustrating a base agent coating apparatus according to the first embodiment. . FIG. 3 is a cross-sectional view around the cooling section of the base agent coating apparatus, and FIG. 4 is a schematic configuration diagram showing the periphery of the cooling section of the base agent coating apparatus according to the modification.

  A newspaper offset rotary printing press 1 (hereinafter referred to as a rotary printing press) applied as a rotary printing press performs a ground treatment on the web W while conveying the web W (continuous paper) that is a printing object, Printing is performed on the web W after the surface treatment. As shown in FIG. 1, the rotary printing press 1 includes a plurality (one in the drawing) of paper feeding devices, a plurality (one in the drawing) infeed devices 6 from the upstream side in the conveyance direction of the web W, A plurality of (in the figure, one) base agent coating apparatus 10 and a plurality (in the figure, one) printing apparatus 7 are provided.

  Each paper feeding device includes a holding arm 15 that holds three webs P each having a web W wound in a roll shape. By rotating the holding arm 15, the webs P are brought to the paper feeding position. I can do it. Each paper feeding device is provided with a paper splicing device (not shown). When the web P fed out at the paper feeding position becomes small, the paper splicing device reduces the web P at the paper feeding position. The web P in the standby position can be spliced.

  Each infeed device 6 includes an infeed roller 20 that is rotationally driven by a drive motor (not shown), and a dancer roller 21 that moves in the radial direction to adjust the dancer pressure. Are arranged in rolling contact with the web. For this reason, the infeed roller 20 conveys the web W toward the downstream base material coating device 10 by rotating, and the dancer roller 21 adjusts the tension of the web W by adjusting the dancer pressure. Yes.

  Although details will be described later, each base agent coating apparatus 10 applies a base agent to the web W to be transported, and thereafter performs a base treatment on the web W by drying the base agent.

  Each printing device 7 is, for example, a multi-color printing duplex printing device that performs duplex four-color printing. Each printing apparatus 7 includes a pair of blanket cylinders 25 and 25 that are in rolling contact with both sides of the conveyed web, a pair of plate cylinders 24 and 24 that are in contact with the pair of blanket cylinders 25 and 25, and an ink for each plate cylinder 24. Ink rollers (not shown) can be supplied, and a total of four sets are provided, one set for one color. The printing device 7 is not limited to the multicolor double-sided printing device, but a two-color double-sided printing device that performs double-sided two-color printing, a single-color double-sided printing device that performs double-sided single-color printing, and a multicolored single-sided surface that performs four-color or two-color printing on one side. You may use properly according to printed matter, such as a printing apparatus.

  Although not shown, a web pass device is disposed on the downstream side of the plurality of printing devices 7, and a folding machine is disposed on the downstream side of the web pass device.

  The web pass device is provided with a plurality of cutters for cutting at the center in the width direction (lateral direction) along the conveyance direction (vertical direction) of the web W, and a number of turn bars for setting the conveyance path of the cut web W. It has been. Accordingly, each web W printed by each printing device 7 is vertically cut by the cutter in the web pass device, and the conveyance path is changed by the turn bar, and is superposed in a predetermined order.

  When a plurality of overlapped webs W are introduced from the web pass device, the folding machine vertically folds the web W, cuts it horizontally by a predetermined length, and then horizontally folds it to obtain a desired origami (newspaper: printed matter). ) And the paper is discharged.

  Here, a series of printing operations by the rotary printing press 1 will be described. First, when each web W is supplied from each paper feeding device to each base material coating device 10 via each infeed device 6, each base material coating device 10 performs base processing on each web W. . Subsequently, when the web W after the base processing is supplied from each base agent coating apparatus 10 to each printing apparatus 7, each printing apparatus 7 performs four-color printing or two-color printing on both sides. . Next, the plurality of webs W printed by each printing device 7 are vertically cut by a cutter in the web pass device, the travel route is changed, and the webs are overlapped in a predetermined order. Then, when the plurality of webs W overlapped by the web pass device are introduced into the folding machine, the plurality of overlapped webs W are vertically folded, then horizontally cut by a predetermined length, and then horizontally folded. A desired signature is created, and then the signature is discharged.

  By the way, in the base agent coating apparatus 10 described above, when the base agent is applied to the application surface of the web W, the base agent penetrates from the application surface of the web W and is applied to the non-application surface that is opposite to the application surface of the web W. There is a risk of turning over. For this reason, in Example 1, the base agent is applied to the application surface of the web W, and at the same time, the non-application surface of the web W is cooled. Hereinafter, the base agent coating apparatus 10 according to the first embodiment will be described with reference to FIG.

  The base agent coating apparatus 10 includes an application unit 30 that applies the base agent to one side (front surface or back surface) of the web W, a cooling unit 31 that cools the applied base agent, and a drying unit 32 that dries the cooled base agent. A plurality of guide rollers 33 capable of changing the conveyance direction of the web W are disposed between these portions 30, 31, and 32. At this time, for example, white ink is used as the base agent, and the viscosity of the white ink changes depending on the temperature. Specifically, the lower the temperature, the higher the viscosity of the base material composed of white ink, and the lower the temperature, the lower the viscosity. When using the base agent, the base agent is warmed to about 40 ° C., for example.

  The coating unit 30 applies a base material to the web W, a pressure drum 35 that contacts the plate cylinder 34 across the web W, and rolls the plate cylinder 34 and supplies the base material to the plate cylinder 34. And a base material supply roller 36. The plate cylinder 34 is composed of, for example, a rubber roller, and the base agent supply roller 36 is composed of, for example, an anilox roller. Accordingly, the coating unit 30 supplies the base agent to the plate cylinder 34 by the base agent supply roller 36, and rotates the plate cylinder 34 supplied with the base agent in synchronization with the impression cylinder 35. As a result, the base material is transferred to one side of the web W while the web W introduced into the coating unit 30 is sandwiched between the plate cylinder 34 and the impression cylinder 35. At this time, the peripheral surface temperature of the plate cylinder 34 is about 40 ° C. by being warmed by the base material.

  The drying unit 32 dries the application surface of the web W on which the base agent has been transferred, and includes an electric heater 40 that serves as a heat source, and a blower 41 that blows heat generated by the electric heater 40 toward the web W. , A plurality of nozzles 42 for blowing hot air sent by the blower 41 to the web W, and a guide plate 43 provided to face the plurality of nozzles 42 with the web W interposed therebetween. The plurality of nozzles 42 are arranged on the application surface side of the web W, and are arranged in the web W conveyance direction. The guide plate 43 is formed in a rectangular plate shape, is disposed on the non-application surface side of the web W, and is disposed so as to extend in the conveyance direction of the web W. Accordingly, the drying unit 32 accelerates the volatilization of the solvent of the base agent by blowing hot air blown from the plurality of nozzles 42 onto the application surface of the web W, thereby drying the base agent.

  As shown in FIG. 3, the cooling unit 31 includes a water pipe 45 disposed in the axial center of the impression cylinder 35, and a cooling water supply unit 46 that supplies cooling water to the water pipe 45. The water pipe 45 includes a pressure cylinder side water pipe 47 disposed at the shaft center inside the pressure drum 35, and fixed water pipes 49, 49 connected to both sides of the pressure cylinder side water pipe 47 via rotary joints 48. It is configured. For this reason, the cooling water supplied from the cooling water supply unit 46 is configured not to leak out of the water pipe 45 even when the pressure drum 35 rotates. Thereby, the impression cylinder 35 cooled by the cooling water functions as a cooling roller. At this time, the peripheral surface temperature of the impression cylinder 35 may be cooled so as to be lower than the peripheral surface temperature of the plate cylinder 34, and is preferably cooled to about 20 ° C.

  In addition, the base material coating apparatus 10 is provided with a humidity sensor 50 that detects the humidity inside the apparatus and a cooling temperature control unit 51 that controls the temperature of the cooling water. The cooling temperature control unit 51 controls the temperature of the cooling water based on the humidity detected by the humidity sensor 50, thereby suppressing condensation that occurs on the peripheral surface of the impression cylinder 35.

  The plurality of guide rollers 33 are disposed on the upstream side of the coating unit 30, between the coating unit 30 and the drying unit 32, and on the downstream side of the drying unit 32, and change the conveyance direction of the web W being conveyed. To guide you.

  Here, a series of base processing operations by the base agent coating apparatus 10 will be described. When the web W is introduced into the base agent coating apparatus 10, the base agent is transferred to one side (front surface) of the web W by the plate cylinder 34 (base agent application step). On the other hand, the other surface (back surface) of the web W is cooled by the impression cylinder 35 (non-application surface cooling step). That is, the application surface (front surface) of the web W coated with the base agent is warmed by the plate cylinder 34, while the non-application surface (back surface) of the web W is cooled by the impression cylinder 35. When the non-application surface of the web W is cooled by the impression cylinder 35, the base material applied to the application surface via the web W is cooled. For this reason, the base material is warm on the surface side and cold on the web W side. Accordingly, the cooled base material on the web W side has a high viscosity, so that the base material does not easily penetrate the web W.

  Subsequently, the web W coated with the base material is introduced into the drying unit 32 while being guided by the guide rollers 33. Hot air is blown from the plurality of nozzles 42 to the application surface of the web W introduced into the drying unit 32 (drying process). As a result, the base agent on the coated surface is dried by volatilization of the solvent, and the base treatment is completed as described above. Then, the web W after the ground processing is conveyed toward the printing device 7 on the downstream side.

  According to the above configuration, the base agent coating apparatus 10 can cool the base agent simultaneously with the application of the base agent. For this reason, since the viscosity of the web-side base agent can be increased before the base agent penetrates the web W, the base agent is less likely to penetrate the web W. Thereby, since the base agent can remain on the application surface of the web W without the base agent being transferred to the non-application surface, the base agent can preferably function as a seal. Furthermore, since it is possible to suppress the absorption of excess base material with respect to the web W, wrinkles and the like generated on the web W can be suppressed.

  In the first embodiment, the pressure drum 35 is caused to function as a cooling roller by passing cooling water through the pressure drum 35. However, the present invention is not limited to this, and a modified example shown in FIG. The cooling roller 55 may be rolled. The cooling roller 55 may have substantially the same configuration as that of the pressure drum 35. Although not shown, the roller main body, a water pipe disposed at the axis of the roller main body, and cooling water is supplied to the water pipe. The roller main body may be cooled by providing a cooling water supply unit that performs cooling water through the water pipe. At this time, the cooling roller 55 may cool the circumferential surface temperature of the impression cylinder 35 so as to be lower than the circumferential surface temperature of the plate cylinder 34. Preferably, the circumferential surface temperature of the impression cylinder 35 is 20 degrees. Cool to about ℃.

  Next, a base agent coating apparatus 100 according to the second embodiment will be described with reference to FIG. Only different parts will be described to avoid redundant description. FIG. 5 is a schematic configuration diagram illustrating a base agent coating apparatus according to the second embodiment. In the base agent coating apparatus 10 according to the first embodiment, the cooling unit 31 is disposed inside the impression cylinder 35. Instead, the cooling agent 31 is cooled upstream of the impression cylinder 35 in the base agent coating apparatus 100 according to the second embodiment. A portion 105 is provided.

  Specifically, the cooling unit 105 of the base material coating apparatus 100 includes a cooling roller 106, and the cooling roller 106 is arranged near the upstream side in the web W conveyance direction with respect to the plate cylinder 34 and the impression cylinder 35. It is installed. The cooling roller 106 is disposed so as to be in rolling contact with the non-application surface (back surface) of the web W, and cools the non-application surface of the web W before application of the base agent. Since the cooling roller 106 is configured in the same manner as the cooling roller 55 in the modification of the first embodiment, the description thereof is omitted.

  Therefore, when the web W is introduced into the base material coating apparatus 100 of the second embodiment, first, the other side (non-coating surface) of the web W is cooled by the cooling roller 106. Thereafter, the web W whose non-application surface has been cooled is introduced into the application unit 30, and the application unit 30 applies the base agent to one side (application surface) of the web W. The cooling roller 106 may be cooled so that its peripheral surface temperature is lower than the peripheral surface temperature of the plate cylinder 34, and preferably the peripheral surface temperature is about 20 ° C. To do.

  According to the above configuration, the base agent coating apparatus 100 can cool the non-application surface of the web W immediately before application of the base agent. For this reason, when the base agent is applied to the application surface of the web W, the applied base agent on the web side is cooled by being in contact with the web W, becomes high viscosity, and hardly penetrates into the web W. Thereby, since the base agent can remain on the application surface of the web W without the base agent being transferred to the non-application surface, the base agent can preferably function as a seal. Furthermore, since it is possible to suppress the absorption of excess base material with respect to the web W, wrinkles and the like generated on the web W can be suppressed. The cooling roller 106 is disposed in the vicinity of the upstream side in the conveyance direction of the web W of the impression cylinder 35. However, the distance between the impression cylinder 35 and the cooling roller 106 is a distance at which the cooling effect by the cooling roller 106 is sustainable. It only has to be. In the second embodiment, the cooling roller 106 is disposed in the vicinity of the upstream side of the plate cylinder 34, but a heating roller may be disposed in contact with the cooling roller 106.

  Next, a base agent coating apparatus 200 according to the third embodiment will be described with reference to FIG. In this case as well, only different parts will be described to avoid redundant description. FIG. 6 is a schematic configuration diagram illustrating a base agent coating apparatus according to the third embodiment. In the base agent coating apparatus 100 according to the second embodiment, the cooling unit 105 is disposed in the vicinity of the upstream side of the impression cylinder 35. However, in the base agent coating apparatus 200 according to the third embodiment, the cooling unit 205 is disposed downstream of the impression cylinder 35. It is arranged near the side.

  Specifically, the cooling unit 205 of the base material coating apparatus 200 includes a cooling roller 206, and the cooling roller 206 is arranged near the downstream side in the web W conveyance direction with respect to the plate cylinder 34 and the impression cylinder 35. It is installed. The cooling roller 206 is disposed so as to be in rolling contact with the non-application surface (back surface) of the web W, and cools the non-application surface of the web W after applying the base agent. The cooling roller 206 is configured in the same manner as the cooling roller 55 in the modified example of the first embodiment, and a description thereof will be omitted.

  Therefore, when the web W is introduced into the base agent coating apparatus 200 of the third embodiment, the coating unit 30 applies the base agent to one side (application surface) of the introduced web W, and immediately after this, the cooling is performed. The unit 205 cools the non-application surface of the web W by the cooling roller 206. The cooling roller 206 may be cooled so that its peripheral surface temperature is lower than the peripheral surface temperature of the plate cylinder 34, and preferably the peripheral surface temperature is about 20 ° C. To do.

  According to the above configuration, the base agent coating apparatus 200 can cool the non-application surface of the web W immediately after the base agent is applied. For this reason, since the viscosity of the web-side base agent can be increased before the base agent penetrates the web W, the base agent is less likely to penetrate the web W. Thereby, since the base agent can remain on the application surface of the web W without the base agent being transferred to the non-application surface, the base agent can preferably function as a seal. Although the cooling roller 206 is disposed in the vicinity of the downstream side in the conveyance direction of the web W of the impression cylinder 35, the distance between the impression cylinder 35 and the cooling roller 206 is a distance at which the base material does not completely penetrate the web W. It only has to be. In the third embodiment, the cooling roller 206 is disposed in the vicinity of the downstream side of the plate cylinder 34. However, a cooling roller may be further disposed in contact with the cooling roller 206.

  Next, with reference to FIG. 7, a base agent coating apparatus 300 according to Example 4 will be described. FIG. 7 is a schematic configuration diagram illustrating a base agent coating apparatus according to the fourth embodiment. The base agent coating apparatus 300 according to the fourth embodiment applies the base agent to both sides of the web W to be transported, and cools the base agent applied to both sides of the web W immediately before and after the application of the base agent. Yes.

  The base agent coating apparatus 300 includes an application unit 304 that applies the base agent to both sides of the web W, a cooling unit 305 that cools the base agent applied to both sides, and a drying unit (not shown) that dries the cooled base agent. It has. The drying unit dries both surfaces of the web W to which the base agent has been transferred.

  The application unit 304 includes a pair of plate cylinders 310 and 310 that are in rolling contact with the web W interposed therebetween, and a pair of base agent supply rollers 311 and 311 that are in contact with each plate cylinder 310 and supply the base agent to each plate cylinder 310. I have. At this time, the pair of plate cylinders 310 and 310 are configured to be able to partially transfer the base agent to both surfaces of the web W. Specifically, the base is applied to a predetermined region on the surface of the web W. While applying the agent, the base agent is applied to a predetermined region on the back surface of the web W. Accordingly, the web W introduced into the coating unit 304 is sandwiched between the pair of plate cylinders 310 and 310, and the base material is partially transferred to both surfaces thereof. The web W after the base material transfer is directed toward the drying unit. Be transported.

  The cooling unit 305 includes an upstream ventilation unit 315 disposed in the vicinity of the upstream side of the pair of plate cylinders 310 and 310, and a downstream ventilation unit 316 disposed in the vicinity of the downstream side of the pair of plate cylinders 310 and 310. The upstream side ventilation portion 315 ventilates the other side (back surface) of the web W, and the downstream side ventilation portion 316 ventilates the one side (front surface) of the web W. The upstream-side ventilation unit 315 includes, for example, a slit-shaped ventilation nozzle 320 that extends in the width direction of the web W, and a cool air blower 321 that can blow cool air to the ventilation nozzle 320. And the ventilation nozzle 320 is arrange | positioned so that cold air may be sprayed on the back surface of a web, and the cold air blower 321 blows cold air on the back surface of the web W via the ventilation nozzle 320, and the web W The back side is cooled. The downstream side ventilation unit 316 has the same configuration as the upstream side ventilation unit 315 and includes a ventilation nozzle 325 and a cold air blower 326. And the ventilation nozzle 325 is arrange | positioned so that cold air may be sprayed on the surface of a web, and the cold air blower 326 blows cold air on the surface of the web W via the ventilation nozzle 325, and thereby the web W The surface is cooling. The ventilation nozzles 320 and 325 can be fitted with mask plates 330 and 331 that block a part of the opening in the width direction. Then, by attaching the mask plates 330 and 331 to the ventilation nozzles 320 and 325, the ventilation nozzles 320 and 325 can partially blow cool air in the width direction of the web W.

  Here, a series of base processing operations performed by the base agent coating apparatus 300 according to the fourth embodiment will be described. When the web W is introduced into the base agent coating apparatus 300, first, the upstream side ventilation portion 315 cools the back surface of the web W. At this time, the upstream side ventilation portion 315 is appropriately adjusted in the width direction of the web W and attached to the ventilation nozzle 320 so that the upstream side ventilation portion 315 has the same width as the width of the base agent applied to the surface of the web W. Spray cool air on the parts that need to be cooled. When the base agent is applied over the entire width of the surface of the web W, the upstream-side ventilation unit 315 may be blown with cold air over the entire width of the web W without mounting the mask plate 330.

  Subsequently, when the web W whose back surface is cooled is introduced into the coating unit 304, the coating unit 304 transfers the base material onto both sides of the web W by the pair of plate cylinders 310 and 310. At this time, the application unit 304 can partially apply the base agent to both surfaces of the web W. When the base material is transferred to both surfaces of the web W, the back surface of the web W is cooled in advance, so that the back-off of the base material applied to the surface of the web W can be suppressed.

  Thereafter, when the web W having the base material applied on both sides is introduced into the downstream ventilation portion 316, the downstream ventilation portion 316 cools the surface of the web W. At this time, similarly to the upstream side ventilation unit 315, the downstream side ventilation unit 316 is prepared by appropriately adjusting the mask plate 331 in the width direction of the web W and attaching it to the ventilation nozzle 325, and applying the base material applied to the back surface of the web W By making the width the same as the width of, cool air is blown to the part that needs to be cooled. Also in this case, similarly to the upstream side ventilation portion 315, when the base agent is applied over the entire width on the back surface of the web W, the downstream side ventilation portion 316 does not have the mask plate 331 attached, and the entire width of the web W. In this case, cold air may be blown. Thereby, by cooling the surface of the web W, the back-off of the base agent applied to the back surface of the web W can be suppressed.

  According to the above configuration, the base agent coating apparatus 300 can apply the base agent to both surfaces of the web W and cool both surfaces of the web W. As a result, the base agent applied on both sides can be allowed to stay on the web W without being set off, so that the base agent can suitably function as a seal.

  In the second and third embodiments, the cooling rollers 106 and 206 are disposed in the vicinity of the upstream side or the downstream side of the plate cylinder 34, but a ventilation portion may be disposed in place of the cooling rollers 106 and 206. .

  As described above, the base agent coating apparatus, the rotary printing press, and the base agent coating method according to the present invention are suitable when the base agent is suitably applied to the web.

1 is a schematic configuration diagram illustrating a part of a newspaper offset rotary printing press according to Embodiment 1. FIG. 1 is a schematic configuration diagram showing a base agent coating apparatus according to Example 1. FIG. It is sectional drawing in the surroundings of the cooling part of a base agent coating device. It is a schematic block diagram showing the circumference | surroundings of the cooling part of the base agent coating device which concerns on a modification. 6 is a schematic configuration diagram illustrating a base agent coating apparatus according to Example 2. FIG. FIG. 5 is a schematic configuration diagram illustrating a base agent coating apparatus according to a third embodiment. FIG. 6 is a schematic configuration diagram illustrating a base agent coating apparatus according to a fourth embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rotation printing machine 6 Infeed apparatus 7 Printing apparatus 10 Base agent coating apparatus 30 Application | coating part 31 Cooling part 32 Drying part 33 Guide roller 34 Plate cylinder 35 Impression cylinder 36 Base agent supply roller 45 Water pipe 46 Cooling water supply part 50 Humidity sensor 51 Cooling temperature control unit 55 Cooling roller (modified example)
100 Base agent coating apparatus (Example 2)
106 Cooling roller (Example 2)
200 Base agent coating apparatus (Example 3)
206 Cooling roller (Example 3)
300 Base material coating apparatus (Example 4)
315 Upstream ventilation section 316 Downstream ventilation section W web

Claims (10)

A pair of printing cylinders capable of applying a base material to at least one of the front and back surfaces of the continuous paper to be conveyed;
A non-coating surface cooling means capable of cooling a non-coating surface, which is opposite to the coating surface of the continuous paper coated with the base agent, before and after the application of the base agent by the pair of printing cylinders. A base material coating apparatus characterized by that. It further comprises a drying means capable of drying the continuous paper after applying the base agent,
The base agent coating apparatus according to claim 1, wherein the non-application surface cooling unit is disposed upstream of the drying unit in the transport direction of the continuous paper. One of the pair of printing cylinders is composed of a plate cylinder and the other is composed of an impression cylinder, and the base agent can be applied to the front or back surface of the continuous paper,
The base agent coating apparatus according to claim 1, wherein the non-application surface cooling unit cools the impression cylinder.   The base agent coating apparatus according to claim 3, wherein the non-application surface cooling means includes water passage means for passing cooling water through the impression cylinder.   4. The base material coating apparatus according to claim 3, wherein the non-application surface cooling means includes a cooling roller that is in rolling contact with the impression cylinder and that can cool the impression cylinder. The non-application surface cooling means has a cooling roller that is in rolling contact with the non-application surface of the continuous paper,
The cooling roller is disposed at least one of the vicinity of the upstream side in the transport direction of the continuous paper and the vicinity of the downstream side of the transport direction of the continuous paper with respect to the pair of printing cylinders. The base agent coating apparatus according to claim 1 or 2. The non-application surface cooling means has a ventilation means capable of ventilating air to the non-application surface of the continuous paper,
The ventilation means is arranged at least in the vicinity of the upstream side in the transport direction of the continuous paper and the downstream side in the transport direction of the continuous paper with respect to the pair of printing cylinders. The base agent coating apparatus according to claim 1 or 2. Humidity detection means capable of detecting the humidity inside the device;
Cooling temperature control means capable of controlling the cooling temperature by the non-application surface cooling means so that the cooling temperature by the non-application surface cooling means does not become a temperature at which condensation can occur with respect to the detected humidity. The base agent coating apparatus according to any one of claims 1 to 7, wherein A base agent coating apparatus according to any one of claims 1 to 8,
A rotary printing machine comprising: a printing device capable of printing on the continuous paper after applying the base agent. A base agent application step of applying a base agent to at least one of the front and back surfaces of the continuous paper to be conveyed;
A non-coating surface cooling step for cooling a non-coating surface that is opposite to the coating surface of the continuous paper coated with the base agent before and after the base agent coating step. Agent coating method.

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