JP2011116036A - Web conveying apparatus and printing machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a coating face from causing a deficit by re-attaching an evaporated solvent on a face coated with a solvent-containing coating liquid on the surface conveyed from a drying apparatus in a web conveying apparatus and a printing machine. <P>SOLUTION: In a web conveying process in which a web W dried by a drying apparatus 14 is wound on a cooling cylinder 25 of a cooling apparatus 15 and is cooled while it is conveyed, an air feeding apparatus 31 is provided as an air flow accelerating means for accelerating the air flow near a winding starting position of the web W by the cooling cylinder 25. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a web conveyance device that conveys a printed and dried web by a guide roll, and a printing machine equipped with the web conveyance device.

  In general, an offset rotary printing press includes a paper feeding device, an infeed device, a printing device, a drying device, a cooling device, a web pass device, a folding device, and a paper discharge device. Accordingly, the web is pulled out from the winding body by the paper feeding device, the web is supplied to the printing device with a predetermined tension by the infeed device, and the multicolor printing is performed and printed by each printing unit in the printing device. The web is dried by a drying device, cooled by a cooling device, conveyed through a web pass device, cut and folded by a folding device, and then a crease is created and carried out by a paper discharge device. .

  By the way, in the offset rotary printing press described above, the printed web is dried by drying the transferred ink with hot air in a drying device and transporting it while contacting a plurality of cylinders with a cooling device. Later excess heat is cooled. In this case, in the drying device, the ink is dried by blowing warm air on the printing surface (transferred ink) of the web. At this time, the solvent contained in the ink becomes vapor, and the solvent vapor is Accompanying the running of the web flows into the cooling device. In the cooling device, the web printing surface is brought into contact with the cylinder for cooling, so that the solvent vapor from the drying device stays around the contact portion between the web printing surface and the cylinder outer peripheral surface. At this time, the solvent vapor is cooled. Is condensed and adheres to the printing surface. Then, the transferred ink is dissolved on the printed surface of the web to which the solvent vapor is adhered, and when the printed surface of the web comes into contact with the outer peripheral surface of the next cylinder, the dissolved ink adheres to the surface of the cylinder. While printing defects occur, the cylinders become dirty and hinder web conveyance.

  Therefore, as a technique for preventing the solvent vapor from the drying device from flowing into the cooling device, for example, there is one described in Patent Document 1 below. In the smoke cutter device described in Patent Document 1, smoke (solvent vapor) accompanying the web is removed (peeled) by blowing air toward the upper and lower surfaces of the web discharged from the drying device.

Japanese Utility Model Publication No. 06-064871

  In the above-described conventional smoke cutter device, the air accompanying the web is removed by blowing air toward the upper and lower surfaces of the web, and the blowing speed (flow rate) of air onto the web is important. . That is, when the air blowing speed to the web is low, the smoke accompanying the web cannot be properly removed. On the other hand, when the blowing speed of the air to the web is high, the blowing air may cause the web to flutter, and the web may contact the smoke cutter or may contact the peripheral members in the drying device. Yes, the printed surface of the web may be damaged.

  The present invention solves the above-described problems, and prevents the coated surface from being lost due to re-adhesion of the evaporated solvent onto the surface that is conveyed from the drying apparatus and coated with the coating liquid containing the solvent. An object of the present invention is to provide a web conveyance device and a printing press.

  In order to achieve the above object, the web transport device of the present invention is a web transport device that winds and transports a web dried by a drying device around a rotating body, and an air flow in the vicinity of a web winding start position by the rotating body. An airflow promoting means for promoting the flow is provided.

  Therefore, when the web is wound around the rotating body from the drying device, the flow of airflow in the vicinity of the web winding start position by the rotating body is promoted by the airflow promoting means, so that the solvent vapor accompanying the web is rotated by the rotating body. The web does not stay in the vicinity of the web winding start position, and the adverse effect of the solvent vapor accompanying the web is suppressed and the coating liquid such as ink and aqueous varnish is applied to the web conveyed from the drying device. The quality of the applied surface can be improved.

  In the web conveyance device of the present invention, the airflow promoting means includes fluid supply means for supplying a fluid toward a solvent vapor retention portion in the vicinity of a web winding start position by the rotating body.

  Therefore, it is possible to simplify the apparatus by using the airflow promoting means as the fluid supply means, and the fluid supply means supplies the fluid toward the solvent vapor retention portion, so that the solvent vapor staying there is retained. Can be properly removed.

  In the web conveyance device of the present invention, the fluid supply means supplies the fluid from the upstream side in the rotation direction of the rotating body toward the solvent vapor retention portion.

  Therefore, the fluid supply means can efficiently supply the fluid toward the solvent vapor retention portion by supplying the fluid in accordance with the surrounding airflow generated by the rotation of the rotating body.

  In the web conveyance device of the present invention, the fluid supply means supplies a fluid toward a contact surface side when being wound around the rotating body.

  Therefore, since the fluid is supplied toward the rotating body and the web contact surface side, when the web is wound around the rotating body by the rotating body and the conveying direction thereof is changed, the solvent concentration can be appropriately reduced, Defects can be prevented more effectively.

  In the web conveyance device of the present invention, the fluid supply direction by the fluid supply means is set to a predetermined acute angle toward the downstream side in the traveling direction of the web wound around the rotating body.

  Therefore, the fluid from the fluid supply means can be properly supplied to the solvent vapor retention part.

  In the web conveyance device of the present invention, the fluid supply speed and the fluid supply flow rate by the fluid supply means are controlled in conjunction with the operation speed of the device.

  Therefore, according to the operating speed of the apparatus, a more appropriate flow can be generated to reduce the solvent concentration, and the coating surface can be more effectively prevented from being lost.

  In the web conveyance device of the present invention, the fluid supply speed by the fluid supply means is set to the same speed as the circumferential speed of the rotating body or the web conveyance speed.

  Therefore, when the fluid from the fluid supply unit appropriately flows in with the surrounding airflow generated by the rotation of the rotating body, adverse effects on the web conveyance and the printing surface can be reduced.

  In the web conveyance device of the present invention, the fluid supply means supplies the fluid from the upstream side in the traveling direction of the web toward the solvent vapor retention portion.

  Therefore, the fluid from the fluid supply means is supplied to the solvent vapor retention part together with the entrained flow of the web toward the rotating body, and the fluid can be appropriately supplied to the solvent vapor retention part.

  In the web conveyance device of the present invention, the fluid supply means can eject air or air containing mist.

  Therefore, the structure can be simplified by applying air as a fluid, and the web heated by the drying device can be cooled by applying air containing mist.

  In the web conveyance device of the present invention, the fluid supply means supplies a fluid from a central portion in an axial direction of the rotating body toward an end portion.

  Therefore, when the fluid is supplied from the central portion in the axial direction of the rotating body toward the end side, the solvent vapor is not only removed in a direction away from the rotating body but also on the axial end side. As a result, the solvent vapor can be appropriately eliminated, and the adverse effect of the solvent vapor accompanying the web can be suppressed.

  In the web conveyance device of the present invention, the airflow promoting means includes fluid suction means for sucking solvent vapor staying in the vicinity of a web winding start position by the rotating body.

  Therefore, it is possible to simplify the apparatus by using the airflow promoting means as the fluid suction means, and the fluid suction means sucks the solvent vapor that remains, and therefore can prevent deterioration of the environmental state. .

  In the web conveyance device of the present invention, the air flow promoting means includes a fluid supply means for supplying a fluid toward a solvent vapor retention portion in the vicinity of a web winding start position by the rotating body, and a web winding by the rotating body. It has a fluid suction means for sucking the solvent vapor staying in the vicinity of the attachment start position.

  Therefore, the fluid supply means and the solvent suction means can more appropriately remove the solvent vapor staying in the solvent vapor staying section, and the solvent suction means sucks the staying solvent vapor and deteriorates the environmental condition. Can be prevented.

  In the web conveyance device of the present invention, the drying device is for drying by applying heat to the web, and the rotating body has a cooling device for cooling the web.

  Therefore, the web heat-dried by the drying device can be cooled by the cooling device for the rotating body, and the printing quality can be improved.

  Further, the printing machine of the present invention dries the web fed from the web, the printing device that prints the web fed from the paper feeding device, and the web printed by the printing device. A drying device, a cooling device that winds and cools the web dried by the drying device around a cooling cylinder, a folding device that forms a fold by cutting and bending the web cooled by the cooling device, and the folding device. And a paper discharge device that discharges the signature formed by the device, wherein an air flow promoting means is provided to promote the flow of the air flow in the vicinity of the web winding start position by the cooling cylinder. It is a feature.

  Therefore, when the web is wound around the cooling cylinder from the drying device, the flow of airflow in the vicinity of the web winding start position by the cooling cylinder is promoted by the airflow promoting means, so that the solvent vapor accompanying the web is cooled by the cooling cylinder. The web does not stay in the vicinity of the web wrapping start position, and the adverse effect of the solvent vapor accompanying the web on the web conveyed from the drying device can be suppressed and the print quality can be improved. it can.

  Further, the printing machine of the present invention includes a paper feeding device that feeds a web from a web, a ground treatment agent feeding device that feeds a ground processing agent to the web fed from the paper feeding device, and a ground processing supplied to the web. A printing machine comprising: a drying device that dries the agent; and a rotator that winds and transports the web dried by the drying device, wherein the flow of airflow in the vicinity of the web winding start position by the rotator is measured. A printing machine characterized in that an airflow promoting means for promoting is provided.

  Therefore, when the web is wound around the rotating body from the drying device, the flow of airflow in the vicinity of the web winding start position by the rotating body is promoted by the airflow promoting means, so that the solvent vapor accompanying the web is rotated by the rotating body. The web does not stay in the vicinity of the web winding start position, and the web transported from the drying device is suppressed from adverse effects caused by the solvent vapor accompanying the web, and a coating solution such as a surface treatment agent is applied. The quality of the coated surface can be improved.

  According to the web conveyance device of the present invention, since the air flow promoting means for accelerating the flow of the air flow in the vicinity of the web winding start position by the rotating body is provided, the coating liquid that is conveyed from the drying device and contains the solvent is applied. It is possible to prevent the formed surface from being lost again by the solvent.

  Further, according to the printing press of the present invention, the air flow in the vicinity of the web winding start position by the cooling cylinder is configured to include the paper feeding device, the printing device, the drying device, the cooling device, the folding device, and the paper discharge device. Since the air flow promoting means for accelerating the flow is provided, the adverse effect of the solvent vapor accompanying the web on the web conveyed from the drying device can be suppressed, and the quality can be improved.

  Further, according to the printing machine of the present invention, it is configured to include the paper feeding device, the ground treatment agent supply device, the drying device, and the guide roller, and promote the flow of the air current in the vicinity of the web winding start position by the guide roller. Since the air flow promoting means is provided, the adverse effect of the solvent vapor accompanying the web on the web conveyed from the drying device can be suppressed, and the quality can be improved.

FIG. 1 is a schematic diagram illustrating a web conveyance device according to a first embodiment of the present invention. FIG. 2 is a schematic diagram illustrating an air injection device in the web conveyance device of the first embodiment. FIG. 3 is a detailed view showing the flow of the solvent vapor in the vicinity of the cooling cylinder. FIG. 4A is a schematic diagram illustrating the flow of solvent vapor in the vicinity of a cooling cylinder in a conventional web conveyance device. FIG. 4-2 is a schematic diagram illustrating the flow of the solvent vapor in the vicinity of the cooling cylinder in the web conveyance device of the first embodiment. FIG. 5 is a schematic configuration diagram illustrating a commercial offset rotary printing press as a printing press on which the web conveyance device of Example 1 is mounted. FIG. 6 is a schematic diagram illustrating a web conveyance device according to a second embodiment of the present invention. FIG. 7 is a schematic diagram illustrating a web conveyance device according to a third embodiment of the present invention. FIG. 8 is a schematic diagram illustrating a web conveyance device according to a fourth embodiment of the present invention. FIG. 9 is a schematic diagram illustrating a modification of the web conveyance device according to the fourth embodiment. FIG. 10 is a schematic diagram illustrating a web transport device according to a fifth embodiment of the present invention. FIG. 11 is a schematic configuration diagram illustrating a printing machine on which the web conveyance device according to the sixth embodiment is mounted.

  Exemplary embodiments of a web conveyance device and 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.

  1 is a schematic diagram illustrating a web conveyance device according to a first embodiment of the present invention, FIG. 2 is a schematic diagram illustrating an air injection device in the web conveyance device according to the first embodiment, and FIG. 3 is a solvent vapor in the vicinity of a cooling cylinder. FIG. 4A is a schematic diagram illustrating the flow of solvent vapor in the vicinity of the cooling cylinder in the conventional web conveyance device, and FIG. 4B is the vicinity of the cooling cylinder in the web conveyance device of the first embodiment. FIG. 5 is a schematic configuration diagram showing a commercial web offset printing press as a printing machine on which the web conveyance device of Example 1 is mounted.

  The printing press of the present embodiment is a commercial offset rotary printing press, and as shown in FIG. 5, a paper feeding device 11, an infeed device 12, a printing device 13, a drying device 14, and a cooling device 15. And a web pass device 16, a folding device 17, and a paper discharge device 18.

  The paper feeding device 11 has a reel stand on which two winding bodies (web rolls) are mounted, and the web W that has been drawn out of one winding body and travels is transferred to the other winding body. By connecting to the web W, the web W can be continuously supplied. The in-feed device 12 supplies the web W fed from the paper feeding device 11 to the printing device 13 side. The printing apparatus 13 includes four printing units 21, 22, 23, and 24 for four ink colors, ie, Cyan, Magenta, Yellow, and Black, along the web running direction. Are arranged side by side. Each printing unit 21, 22, 23, 24 can perform printing on both surfaces (front surface and back surface) of the traveling web W.

  The drying device 14 is for drying the ink on the web W printed by the printing device 13, and blows warm air on the upper and lower surfaces of the printed web W to dry the ink. can do. The cooling device 15 cools the web W that stores excessive heat after drying in the drying device 14 to an appropriate temperature, and a plurality of (four in this embodiment) cooling that winds and cools the web W. Cylinders 25, 26, 27, and 28 are provided. The cooling cylinders 25, 26, 27, and 28 can cool the web W that is in contact with each other by circulating cooling water therein. The web pass device 16 conveys the dried and cooled web W, and the folding device 17 cuts the web W after being vertically folded and folds it to a predetermined size to form a fold. The paper discharge device 18 carries out the folded signatures out of the apparatus.

  Accordingly, the web W is pulled out from the winding body by the paper feeding device 11 and supplied to the printing device 13 by the infeed device 12. Printing is performed, and the printed web W is dried by warm air in the drying device 14 and cooled by contacting each cooling cylinder 25, 26, 27, 28 of the cooling device 15, and the web pass device 16. A fold is created by the folding device 17 transported through the sheet, and is carried out by the paper discharge device 18.

  By the way, the ink used in the printing apparatus 13 of such a commercial web offset printing press contains a solvent. For example, oil-based inks and water-based inks are generally formed with pigments, ink resins, petroleum-based solvents or water-soluble solvents, additives, and the like as main components. Then, the web W printed by the printing device 13 is dried with warm air by the drying device 14, and is in contact with the cooling cylinders 25, 26, 27, 28 by the cooling device 15. The excess heat after drying is cooled by being conveyed. At this time, in the drying device 14, when the ink of the web W is dried, the solvent contained in the ink is generated as a vapor, and the solvent vapor flows along with the traveling of the web W toward the cooling device 15. Then, in the cooling device 15, the solvent vapor is cooled and condensed, adheres to the printing surface of the web W, dissolves the ink on the printing surface, and deteriorates the printing quality.

  Therefore, in the first embodiment, the web transport device that transports the web W from the drying device 14 to the cooling device 15 prevents the stagnation of solvent vapor accompanying the web W, thereby suppressing the adverse effect on the printing surface. The quality can be improved.

  That is, in the web conveyance device of the first embodiment, as shown in FIGS. 1 and 2, the air flow that promotes the air flow in the vicinity of the winding start position of the web W by the cooling cylinder (rotating body) 25 of the cooling device 15. Promotion means are provided. In this case, when the web W is transported from the drying device 14 to the cooling device 15 and cooled, the web W is taken up by the cooling cylinder 25. Therefore, the winding start position of the web W is the web W One surface (the lower surface in this embodiment) is a position where it first contacts the outer peripheral surface of the cooling cylinder 25.

  In the first embodiment, the airflow promoting means is an air supply device 31 that supplies air (fluid) toward the solvent vapor retention portion in the vicinity of the winding start position of the web W by the cooling cylinder 25. Specifically, the air supply device 31 supplies air from the upstream side in the rotation direction of the cooling cylinder 25 toward the solvent vapor retention portion. In this case, air containing water mist may be injected instead of air.

  In the air supply device 31, an air chamber 32 is provided on the upstream side in the rotation direction of the cooling cylinder 25 with respect to the winding start position of the web W by the cooling cylinder 25. The air chamber 32 is disposed along the axial direction of the cooling cylinder 25 and has at least a length equal to the width of the web W to be conveyed. A slit nozzle 33 is provided in the upper part of the air chamber 32 along the axial direction of the cooling cylinder 25. The slit nozzle 33 is arranged close to the outer peripheral surface of the cooling cylinder 25 with a predetermined gap, and injects air toward the tangential direction of the cooling cylinder 25 and downstream in the rotation direction of the cooling cylinder 25. (Supply) is possible. The air chamber 32 is connected to an air supply source (not shown) via an air pipe 34.

  In this case, the direction of the jet air from the slit nozzle 33 of the air chamber 32 is set to a predetermined acute angle toward the downstream side in the traveling direction of the web W wound around the cooling cylinder 25. That is, the angle θ between the jet air F from the slit nozzle 33 of the air chamber 32 and the web W wound around the cooling cylinder 25 is set to an acute angle smaller than 90 degrees.

  Further, the ejection speed (supply speed) of the ejection air from the slit nozzle 33 of the air chamber 32 is set to be substantially the same as the operation speed of the apparatus (printing machine). That is, when the cooling cylinder 25 rotates, a conveyance flow is generated in the vicinity of the outer peripheral surface thereof, and this conveyance flow is substantially the same speed as the circumferential speed of the cooling cylinder 25 (or the conveyance speed of the web W). Yes. From the slit nozzle 33 of the air chamber 32, jet air having the same speed as the transport flow of the cooling cylinder 25 is jetted. Note that the flow rate of the air injected from the slit nozzle 33 of the air chamber 32 is preferably about 2 to 3 times the flow rate of the transport flow of the cooling cylinder 25.

  In this case, the jet speed and jet flow of the jet air are controlled in conjunction with the operation speed of the apparatus (printing machine). That is, as the rotational speed (circumferential speed) of the cooling cylinder 25 as the operation speed and the web W conveyance speed vary, the injection speed and flow rate of the injection air are changed. In this case, an appropriate air flow can be formed with respect to the rotation speed of the cooling cylinder 25 and the conveyance speed of the web W.

  However, it is not necessary to control the jetting speed and jetting flow rate of the jetting air as fixed values in conjunction with the operation speed of the apparatus (printing machine), and the control system can be simplified. In this case, if the injection speed and the injection flow rate of the injection air are increased with respect to the operation speed of the apparatus, the air flow in the solvent vapor retention part can be greatly promoted, and if the injection speed and the injection flow rate of the injection air are reduced, the consumption is reduced. Electric power can be reduced. Therefore, the jetting speed and jetting flow rate of the jetting air may be set to appropriate values depending on the printing state of the printing press and the surrounding environment.

  A pair of upper and lower smoke cutters 41 and 42 are provided on the outlet side of the web W of the drying device 14 and are located upstream of the cooling device 15. The smoke cutters 41 and 42 separate fluid such as solvent vapor accompanying the web W discharged from the drying device 14 and reduce the flow rate of solvent vapor flowing to the cooling cylinder 25 side.

  Here, the operation of the web conveyance device according to the first embodiment will be described.

  As shown in FIG. 1, the web W on which printing has been completed is dried with warm air on the upper and lower surfaces (front surface and back surface) by the drying device 14, and is transported to the cooling device 15. In this cooling device 15, the web W is wound around the cooling cylinders 25, 26... In order, so that the front and back surfaces are in contact with the outer peripheral surfaces of the cooling cylinders 25, 26. .

  At this time, in the drying device 14, when the ink transferred to the web W is dried, the solvent contained in the ink evaporates, and the solvent vapor accompanies the traveling of the web W to the cooling device 15 (cooling cylinder 25) side. Flows in. That is, as shown in FIG. 3, the web W conveyed from the drying device 14 to the cooling device 15 generates airflow A by entraining ambient air including solvent vapor by the airflow generated by the traveling. On the other hand, since the cooling cylinder 25 rotates in the winding direction of the web W, the cooling cylinder 25 generates a transport flow B along the rotation direction in the vicinity of the outer peripheral surface thereof. The airflow A containing the solvent vapor and the air transport flow B flow toward a region D in the vicinity of the winding start position of the web W by the cooling cylinder 25. Then, the airflow A containing the solvent vapor is mixed with the air transport stream B, and a part of the airflow A becomes an exhaust airflow C and is discharged from between the airflow A and the transport stream B. Stays in.

This point is also clear from the schematic diagram of the flow of the air flow in FIG. 4A. Although the air flow A containing the solvent vapor and the air transport flow B flow toward the region D, the exhaust air flow C becomes weak. , swirling flow C ₁ is generated, the airflow a containing solvent vapor stays in the region D, the solvent vapor concentration in this region D is high. Then, the solvent vapor in the region D is cooled and condensed by the cooling cylinder 25, adheres to the printing surface of the web W, dissolves ink on the printing surface, and deteriorates the printing quality.

On the other hand, when air is ejected from the slit nozzle 33 of the air chamber 32 along the transport flow B of the cooling cylinder 25 as in the first embodiment, the flow rate of the air transport flow B is as shown in FIG. increased by the transport stream B ₁ becomes eliminates the airflow a that contains the solvent vapor flowing into the region D, in addition to the discharge airflow C, discharge airflow C ₂ is generated. That is, by promoting the air flow discharged from the region D, the stay of the air flow A containing the solvent vapor in the region D is suppressed, and the concentration of the solvent vapor in the region D is reduced. As a result, the solvent vapor is hardly condensed in the region D by the cooling cylinder 25 and adheres to the printing surface of the web W, thereby preventing the printing quality from being deteriorated.

  As described above, in the web conveyance device and the printing press according to the first embodiment, the web W dried by the drying device 14 is cooled in the web conveyance step in which the web W is cooled while being wound around the cooling cylinder 25 of the cooling device 15. An air supply device 31 is provided as an airflow promoting means for promoting the flow of the airflow in the vicinity of the winding start position of the web W by the cylinder 25.

  Therefore, when the web W is wound around the cooling cylinder 25 from the drying device 14, air is supplied from the air supply device 31 toward the region D in the vicinity of the winding start position of the web W by the cooling cylinder 25. The flow of the exhaust airflow in the region D is promoted. Therefore, the solvent vapor accompanying the web W does not stay in the vicinity of the winding start position of the web W by the cooling cylinder 25, and the solvent accompanying the web W is transported from the drying device 14. It is possible to suppress adverse effects due to steam and improve the printing quality on the coated surface on which a coating liquid such as ink or aqueous varnish is coated.

  In this case, the air supply device 31 is provided as the air flow promoting means, and it is only necessary to provide the air chamber 32 having the slit nozzle 33, which makes it possible to simplify the device. Since air is supplied toward the staying part (region D), the solvent vapor staying here can be appropriately removed.

  In the web conveyance device according to the first embodiment, the air supply device 31 supplies air from the upstream side in the rotation direction of the cooling cylinder 25 toward the solvent vapor retention portion (region D). Accordingly, since the air supply device 31 supplies air in accordance with the surrounding airflow (conveyance flow) generated by the rotation of the cooling cylinder 25, the air can be efficiently supplied toward the solvent vapor retention portion. .

  In the web conveyance device of the first embodiment, the air supply direction by the air supply device 31 is set to a predetermined acute angle toward the downstream side in the traveling direction of the web W wound around the cooling cylinder 25. Therefore, the air from the air supply device 31 can be properly supplied to the solvent vapor retention part.

  In the web conveyance device of the first embodiment, the air supply speed by the air supply device 31 is set to the same speed as the peripheral speed of the cooling cylinder 25. Accordingly, the air from the air supply device 31 properly flows into the surrounding airflow generated by the rotation of the cooling cylinder 25, so that the adverse effect on the conveyance of the web W and the printing surface can be reduced.

  Moreover, in the web conveyance apparatus of Example 1, the air supply apparatus 31 can inject the air containing air or mist. Therefore, the structure can be simplified by applying air as the fluid, and the web W heated by the drying device 14 can be efficiently cooled by applying the air containing mist. .

  FIG. 6 is a schematic diagram illustrating a web conveyance device according to a second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the same function as what was demonstrated in the Example mentioned above, and the overlapping description is abbreviate | omitted.

  In the web conveyance device of the second embodiment, as shown in FIG. 6, the web by the cooling cylinder 25 is used as an airflow promoting means for promoting the flow of the airflow in the vicinity of the winding start position of the web W by the cooling cylinder 25 of the cooling device 15. An air supply device 51 that supplies air (fluid) toward the solvent vapor staying portion in the vicinity of the W winding start position is provided. Specifically, the air supply device 51 supplies a fluid from the upstream side in the traveling direction of the web W toward the solvent vapor retention portion.

  In the air supply device 51, an air chamber 52 is provided between the drying device 14 and the cooling cylinder 25 of the cooling device 15 and below the traveling web W. The air chamber 52 is disposed along the axial direction of the cooling cylinder 25 and has at least a length equivalent to the width of the web W to be conveyed. A slit nozzle 53 along the axial direction of the cooling cylinder 25 is provided on the cooling cylinder 25 side in the air chamber 52. The slit nozzle 53 can inject (supply) air substantially in parallel toward the downstream side in the running direction of the web W.

  In this case, the ejection speed (supply speed) of the ejection air from the slit nozzle 53 of the air chamber 52 is set to be substantially the same as the operation speed of the apparatus, here, the web W conveyance speed. That is, when the web W travels, a transport flow is generated in the vicinity of the upper and lower surfaces thereof, and this transport flow is substantially the same speed as the transport speed of the web W. From the slit nozzle 53 of the air chamber 52, jet air having the same speed as the web W conveyance flow is jetted.

  Therefore, when the printed web W is thermally dried by the drying device 14 and cooled by being sequentially wound around the cooling cylinders 25, 26... Of the cooling device 15, the ink transferred to the web W is transferred. The solvent contained in the gas evaporates, and the solvent vapor flows along the web W and flows into the cooling device 15 (cooling cylinder 25).

At this time, the air supply device 51 injects air from the slit nozzle 53 of the air chamber 52 along the air flow A including the solvent vapor accompanying the web W conveyed from the drying device 14 to the cooling device 15. Then, the transport stream A ₁ next flow is increased in the air flow A including the solvent vapor, the air flow A ₁ containing solvent vapor flowing into the region D airflow discharged from the region D is promoted. Therefore, the residence of the airflow A containing the solvent vapor in the region D is suppressed, and the solvent vapor concentration in the region D is reduced. As a result, the solvent vapor is hardly condensed in the region D by the cooling cylinder 25 and adheres to the printing surface of the web W, thereby preventing the printing quality from being deteriorated.

  As described above, in the web conveyance device and the printing press according to the second embodiment, the web W dried by the drying device 14 is cooled in the web conveyance step in which the web W is cooled while being wound around the cooling cylinder 25 of the cooling device 15. An air supply device 51 is provided as an airflow promoting means for promoting the flow of the airflow in the vicinity of the winding start position of the web W by the cylinder 25.

  Therefore, when the web W is wound around the cooling cylinder 25 from the drying device 14, air is supplied from the air supply device 51 toward the region D in the vicinity of the winding start position of the web W by the cooling cylinder 25. The flow of the exhaust airflow in the region D is promoted. Therefore, the solvent vapor accompanying the web W does not stay in the vicinity of the winding start position of the web W by the cooling cylinder 25, and the solvent accompanying the web W is transported from the drying device 14. It is possible to suppress the adverse effect of steam and improve the printing quality.

  In the web conveyance device of the second embodiment, the air supply device 51 supplies air from the upstream side in the traveling direction of the web W toward the solvent vapor retention portion (region D). Therefore, the air from the air supply device 51 is supplied to the solvent vapor retention part together with the accompanying flow of the web W toward the cooling cylinder 25, and air can be appropriately supplied to the solvent vapor retention part. it can.

  FIG. 7 is a schematic diagram illustrating a web conveyance device according to a third embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the same function as what was demonstrated in the Example mentioned above, and the overlapping description is abbreviate | omitted.

  In the web conveyance device of the third embodiment, as shown in FIG. 7, the web by the cooling cylinder 25 is used as an airflow promoting means for promoting the flow of the airflow in the vicinity of the winding start position of the web W by the cooling cylinder 25 of the cooling device 15. An air suction device 61 for sucking the solvent vapor staying in the vicinity of the W winding start position is provided.

  In the air suction device 61, a suction pipe 62 is provided between the drying device 14 and the cooling cylinder 25 of the cooling device 15 and below the traveling web W. The suction pipe 62 is disposed along the axial direction of the cooling cylinder 25 and has at least a length equivalent to the width of the web W to be conveyed. A suction nozzle 63 along the axial direction of the cooling cylinder 25 is provided on the suction pipe 62 in the vicinity of the winding start position of the web W by the cooling cylinder 25. The suction nozzle 63 has a slit shape and can suck ambient air. Note that a suction source (not shown) is connected to the suction pipe 62.

  Therefore, when the printed web W is thermally dried by the drying device 14 and cooled by being sequentially wound around the cooling cylinders 25, 26... Of the cooling device 15, the ink transferred to the web W is transferred. The solvent contained in the gas evaporates, and the solvent vapor flows along the web W and flows into the cooling device 15 (cooling cylinder 25).

  At this time, ambient air is sucked into the suction pipe 62 from the suction nozzle 63 by the air suction device 61. Then, the airflow A containing the solvent vapor flows into the region D, while the air transport flow B generated along with the rotation direction of the cooling cylinder 25 flows toward the region D. Then, the airflow A containing the solvent vapor and the air transport stream B are mixed, and the exhaust airflow C is discharged from between the airflow A and the transport stream B. The suction nozzle 63 sucks the discharged airflow C from the region D, thereby promoting the airflow discharged from the region D. Therefore, the residence of the airflow A containing the solvent vapor in the region D is suppressed, and the solvent vapor concentration in the region D is reduced. Then, the solvent vapor is condensed in the region D by the cooling cylinder 25 and hardly adheres to the printing surface of the web W, and the deterioration of the printing quality is prevented.

  As described above, in the web conveyance device and the printing press according to the third embodiment, the web W dried by the drying device 14 is cooled in the web conveyance step in which the web W is cooled while being wound around the cooling cylinder 25 of the cooling device 15. An air suction device 61 is provided as an airflow promoting means for promoting the flow of the airflow in the vicinity of the winding start position of the web W by the cylinder 25.

  Therefore, when the web W is wound around the cooling cylinder 25 from the drying device 14, the air containing the solvent vapor staying in the region D in the vicinity of the winding start position of the web W by the cooling cylinder 25 is sucked by the air suction device 61. As a result, the flow of the exhaust airflow in the region D is promoted. Therefore, the solvent vapor accompanying the web W does not stay in the vicinity of the winding start position of the web W by the cooling cylinder 25, and the solvent accompanying the web W is transported from the drying device 14. It is possible to suppress the adverse effect of steam and improve the printing quality.

  In the web conveyance device of the third embodiment, the airflow promoting means is the air suction device 61 that sucks the solvent vapor staying in the vicinity of the winding start position of the web W by the cooling cylinder 25. Therefore, the apparatus can be simplified, and the solvent vapor staying in the air suction device 61 is sucked, so that deterioration of the surrounding environmental conditions can be prevented.

  FIG. 8 is a schematic diagram illustrating a web conveyance device according to a fourth embodiment of the present invention, and FIG. 9 is a schematic diagram illustrating a modification of the web conveyance device according to the fourth embodiment. In addition, the same code | symbol is attached | subjected to the member which has the same function as what was demonstrated in the Example mentioned above, and the overlapping description is abbreviate | omitted.

  In the web conveyance device of the fourth embodiment, as shown in FIG. 8, an air supply suction device 71 is used as an air flow promoting means for promoting the flow of the air flow in the vicinity of the winding start position of the web W by the cooling cylinder 25 of the cooling device 15. Is provided.

  The air supply / suction device 71 includes the air chamber 32 having the slit nozzle 33 described in the first embodiment and the suction pipe 62 having the suction nozzle 63 described in the third embodiment. That is, the air chamber 32 is arranged upstream of the rotation direction of the cooling cylinder 25 with respect to the winding start position of the web W by the cooling cylinder 25, and the slit nozzle 33 is provided along the axial direction of the cooling cylinder 25. Yes. The slit nozzle 33 can inject (supply) air toward the downstream side in the rotation direction of the cooling cylinder 25. Further, a suction pipe 62 is disposed below the cooling cylinder 25 of the drying device 14 and the cooling device 15, and a suction nozzle 63 is provided along the axial direction of the cooling cylinder 25. The suction nozzle 63 has a slit shape and can suck ambient air.

  Therefore, when the printed web W is thermally dried by the drying device 14 and cooled by being sequentially wound around the cooling cylinders 25, 26... Of the cooling device 15, the ink transferred to the web W is transferred. The solvent contained in the gas evaporates, and the solvent vapor flows along the web W and flows into the cooling device 15 (cooling cylinder 25).

  At this time, when air is ejected from the slit nozzle 33 of the air chamber 32 along the transport flow B of the cooling cylinder 25, the flow rate of the air transport flow B increases, and the air flow A containing solvent vapor flowing into the region D is generated. The exhaust airflow C is generated. The suction nozzle 63 sucks this exhaust airflow C. That is, in accordance with the supply air from the slit nozzle 33, by promoting the air flow discharged from the region D by the suction force of the suction nozzle 63, the residence of the air flow A containing the solvent vapor in the region D is suppressed, The solvent vapor concentration in this region D is lowered. Then, the solvent vapor is condensed in the region D by the cooling cylinder 25 and hardly adheres to the printing surface of the web W, and the deterioration of the printing quality is prevented.

  In the fourth embodiment, the air supply and suction device 71 is configured by combining the air chamber 32 having the slit nozzle 33 described in the first embodiment and the suction pipe 62 having the suction nozzle 63 described in the third embodiment. However, it is not limited to this configuration. For example, as shown in FIG. 9, an air supply suction device 71A is configured by combining the air chamber 52 having the slit nozzle 53 described in the second embodiment and the suction pipe 62 having the suction nozzle 63 described in the third embodiment. May be. Further, the air chamber 32 having the slit nozzle 33 described in the first embodiment, the air chamber 52 having the slit nozzle 53 described in the second embodiment, and the suction pipe 62 having the suction nozzle 63 described in the third embodiment. In addition, an air supply and suction device may be configured.

  As described above, in the web conveyance device and the printing machine according to the fourth embodiment, the web W dried by the drying device 14 is cooled in the web conveyance step in which the web W is cooled while being wound around the cooling cylinder 25 of the cooling device 15. An air supply / suction device 71 is provided as an airflow promoting means for promoting the flow of the airflow in the vicinity of the winding start position of the web W by the cylinder 25.

  Therefore, when the web W is wound around the cooling cylinder 25 from the drying device 14, air is supplied toward the region D in the vicinity of the winding start position of the web W by the cooling cylinder 25, and the solvent staying in this region D By sucking the air containing steam, the flow of the exhaust airflow in the region D is promoted. Therefore, the solvent vapor accompanying the web W does not stay in the vicinity of the winding start position of the web W by the cooling cylinder 25, and the solvent accompanying the web W is transported from the drying device 14. It is possible to suppress the adverse effect of steam and improve the printing quality.

  FIG. 10 is a schematic diagram illustrating a web transport device according to a fifth embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the same function as what was demonstrated in the Example mentioned above, and the overlapping description is abbreviate | omitted.

  In the web conveyance device of the fifth embodiment, as shown in FIG. 10, the air supply device 81 as the airflow promoting means is upstream of the rotation direction in the cooling cylinder 25 with respect to the winding start position of the web W by the cooling cylinder 25. The air chamber 82 is arranged on the side, and the injection nozzle 83 is formed in the air chamber 82 along the axial direction of the cooling cylinder 25. In this embodiment, the injection nozzle 83 can inject (supply) air toward the downstream side in the rotation direction of the cooling cylinder 25. The injection nozzle 83 can inject air from the central portion in the axial direction of the cooling cylinder 25 toward the end portion. That is, the injection nozzle 83 injects air along the circumferential direction of the cooling cylinder 25 at the axial center position of the cooling cylinder 25, but toward the axial end side of the cooling cylinder 25 at the axial end portion side of the cooling cylinder 25. And inject air at an angle.

  Specifically, a deflecting plate that changes the direction of the air supplied into the slit nozzles may be arranged, or a plurality of injection nozzles may be used. As a result, the flow of the airflow staying in the vicinity of the winding start position of the web W by the cooling cylinder 25 can be promoted, and the solvent vapor staying here can be removed also to the shaft end side of the cooling cylinder 25.

  As described above, in the web conveyance device and the printing machine according to the fifth embodiment, the web W dried by the drying device 14 is cooled in the web conveyance step in which the web W is cooled while being wound around the cooling cylinder 25 of the cooling device 15. An air supply device 81 is provided as an air flow promoting means for promoting the flow of the air flow in the vicinity of the winding start position of the web W by the cylinder 25, and a part of the injection nozzle 83 faces the shaft end side of the cooling cylinder 25.

  Therefore, when the web W is wound around the cooling cylinder 25 from the drying device 14, air is supplied toward the region D in the vicinity of the winding start position of the web W by the cooling cylinder 25. Flow is promoted. At this time, the solvent vapor staying in the vicinity of the winding start position of the web W by the cooling cylinder 25 is simply separated from the cooling cylinder 25 by air being injected from the injection nozzle 83 toward the shaft end side of the cooling cylinder 25. Not only in the direction but also in the shaft end side, the solvent vapor can be properly excluded, and the adverse effect of the solvent vapor accompanying the web W can be suppressed.

  FIG. 11 is a schematic configuration diagram illustrating a printing machine on which the web conveyance device according to the sixth embodiment is mounted.

  The printing press of this embodiment is a newspaper offset rotary printing press, and includes a paper feeding device 101, an infeed device 102, a ground processing device 103, and a printing device 104, as shown in FIG. Although not shown in the drawing, it has a web pass device, a folding device and a paper discharge device.

  The paper feeding device 101 conveys the web W equipped as the web R to the ground processing device 103 and the printing unit 103 via the infeed device 102. The infeed device 102 includes an infeed roller 102a, a dancer roller 102b that adjusts the tension of the web W while moving to change the web path distance, and a guide roller disposed on the exit side of the web W from the dancer roller 102b. 102c, and feeds the web W to the substrate processing apparatus 103 while keeping the web W at a predetermined tension.

  The ground processing device 103 is configured in the same manner as a general offset printing unit, and includes a ground processing agent supply device 103a and a drying device 103b. The surface treatment agent supply apparatus 103a includes a pair of surface treatment agent supply rolls 111a and 111b for supplying the surface treatment agent to the printing plate, and plate cylinders 112a and 112b on which plates corresponding to the printing region of the surface treatment agent are mounted. have. The drying device 103b is for drying the ground treatment agent transferred to the printing surface of the web W, and is configured as a heating device for heating and drying the ground treatment agent.

  A guide roller (rotating body) 121 is disposed between the drying device 103 b of the ground processing device 103 and the printing device 104. Then, as an airflow promoting means for accelerating the flow of the airflow in the vicinity of the winding start position of the web W by the guide roller 121, air is directed toward the solvent vapor retention portion in the vicinity of the winding start position of the web W by the guide roller 121. An air supply device 105 for supplying (fluid) is provided. The air supply device 105 supplies fluid from the upstream side in the traveling direction of the web W toward the solvent vapor retention portion.

  Accordingly, the web W supplied from the sheet feeding device 101 is adjusted in tension by the infeed device 102 and is conveyed to the ground processing device 103. In the surface treatment agent supply unit 103a of the surface treatment apparatus 103, the surface treatment agent is transferred from the surface treatment agent supply rolls 111a and 111b to predetermined pages on the web W through the plate cylinders 112a and 112b. Subsequently, in the drying device 103b, the ground treatment agent is heated and dried by blowing warm air onto the surface of the web W on which the treatment agent is transferred. Then, the web W is guided by the guide roller 121 and conveyed to the printing apparatus 104.

  At this time, when air is jetted from the air supply device 105 to the vicinity of the winding start position of the web W by the guide roller 121, the flow rate of the air conveyance flow by the guide roller 121 increases and is discharged from the solvent vapor retention portion. The air flow is promoted, the stagnation of the air flow containing the solvent vapor is suppressed, and the solvent vapor concentration is lowered. As a result, the solvent vapor is condensed and hardly adheres to the surface of the web W where the surface treatment agent is applied, and deterioration of the quality is prevented.

  As described above, in the web conveyance device and the printing machine according to the sixth embodiment, when the web W dried by the drying device 103b of the ground processing device 103 is wound around the guide roller 121 and conveyed, the web W by the guide roller 121 is transferred. An air supply device 105 is provided as airflow promoting means for promoting the flow of airflow in the vicinity of the winding start position.

  Accordingly, when the web W is wound around the guide roller 121 from the drying device 103b, air is supplied from the air supply device 105 toward the region near the winding start position of the web W by the guide roller 121. The flow of exhaust air flow at is promoted. Therefore, the solvent vapor accompanying the web W does not stay in the vicinity of the winding start position of the web W by the guide roller 121, and the solvent accompanying the web W is transported from the drying device 103b. It is possible to suppress adverse effects due to steam and improve the printing quality on the coated surface on which a coating liquid such as a base treatment agent is coated.

  In the above-described sixth embodiment, the air supply device 105 having the same configuration as that of the above-described first embodiment is applied as the airflow promoting means. However, the configuration is not limited to this configuration, and the second to fifth embodiments are not limited thereto. An applied configuration may be used.

  Further, in each of the above-described embodiments, the web conveyance device of the present invention is disposed between the drying device 14 and the cooling device 15 in a commercial web offset printing press, or the drying device 105 and the guide in a newspaper web offset printing press. Although it arrange | positions between the rollers 121, an application location is not limited to this position, It is not limited to the form of a printing machine. In the first to fifth embodiments, the arrangement of the cooling cylinders 25, 26, 27, and 28 of the cooling device 15 is not limited to the embodiment, and the web W from the drying device 14 is conveyed upward. When the cooling cylinder is arranged, the airflow promoting means is arranged above the traveling web W. Furthermore, the web conveyance apparatus of this invention should just be the downstream of the drying apparatus 14, and may not be between the drying apparatus 14 and the cooling device 15. FIG. In this case, the cooling cylinder 25 of the cooling device 15 may be a simple guide roller.

  In each of the examples, the drying device 14 is a hot air drying device. However, any drying device may be used as long as it heats the ink of the web W and dries, and for example, a drying device using infrared (IR). May be. Furthermore, the ink dried by the drying device may be oily or water-based, and may be a coating material or the like.

  The web conveyance device and the printing press according to the present invention are provided with an airflow promoting means for accelerating the flow of the airflow in the vicinity of the web winding start position by the rotating body, so that the coating is conveyed from the drying device and contains a solvent on the surface. By re-adhering the evaporated solvent to the surface on which the liquid is applied, the applied surface is prevented from being lost, and can be applied to any conveyance device or printing press.

DESCRIPTION OF SYMBOLS 11 Paper feeder 12 Infeed apparatus 13 Printing apparatus 14 Drying apparatus 15 Cooling apparatus 16 Web pass apparatus 17 Folding apparatus 18 Paper discharge apparatus 21, 22, 23, 24 Printing unit 25, 26, 27, 28 Cooling cylinder (rotary body)
31, 51, 81 Air supply device (air flow promotion means, fluid supply means)
32, 52, 82 Air chamber 33, 53 Slit nozzle 61 Air suction device (air flow promotion means, fluid suction means)
62 Suction Pipe 63 Suction Nozzle 71 Air Supply Suction Device (Airflow Promotion Means, Fluid Suction Means)
83 Injecting nozzle 101 Paper feeding device 102 Infeed device 103 Substrate treatment device 103a Ground treatment agent supply device 103b Drying device 104 Printing device 105 Air supply / suction device (air flow promotion means, fluid supply means)
121 Guide roller (rotating body)
W Web (sheet)

Claims (15)

In a web conveyance device that wraps and conveys a web dried by a drying device around a rotating body,
Airflow promoting means for accelerating the flow of airflow in the vicinity of the web winding start position by the rotating body is provided,
The web conveyance apparatus characterized by the above-mentioned.   2. The web conveyance device according to claim 1, wherein the air flow promotion unit includes a fluid supply unit that supplies a fluid toward a solvent vapor staying portion in the vicinity of a web winding start position by the rotating body.   3. The web conveyance device according to claim 2, wherein the fluid supply unit supplies a fluid from the upstream side in the rotation direction of the rotating body toward the solvent vapor retention portion.   4. The web conveyance device according to claim 2, wherein the fluid supply unit supplies a fluid toward a contact surface side when being wound around the rotating body. 5.   5. The web conveyance device according to claim 4, wherein a fluid supply direction by the fluid supply unit is set at a predetermined acute angle toward a downstream side in a traveling direction of a web wound around the rotating body.   The web conveyance device according to any one of claims 3 to 5, wherein a fluid supply speed and a fluid supply flow rate by the fluid supply means are controlled in conjunction with an operation speed of the device.   The web conveyance device according to claim 6, wherein a fluid supply speed by the fluid supply unit is set to be equal to a peripheral speed of the rotating body or a web conveyance speed.   The web conveyance device according to claim 2, wherein the fluid supply unit supplies a fluid from the upstream side in the traveling direction of the web toward the solvent vapor retention portion.   9. The web conveyance device according to claim 2, wherein the fluid supply unit is capable of injecting air or air containing mist. 10.   10. The web conveyance device according to claim 2, wherein the fluid supply unit supplies a fluid from a central portion in an axial direction of the rotating body toward an end portion.   The web transport device according to claim 1, wherein the air flow promoting unit includes a fluid suction unit that sucks a solvent vapor staying in the vicinity of a web winding start position by the rotating body.   The air flow promoting means stays in the vicinity of the web winding start position by the rotating body and the fluid supply means for supplying fluid toward the solvent vapor staying portion in the vicinity of the web winding start position by the rotating body. The web conveyance device according to claim 1, further comprising a fluid suction unit that sucks the solvent vapor.   The web transport according to any one of claims 1 to 12, wherein the drying device heats the web to dry the web, and the rotating body includes a cooling device that cools the web. apparatus. A paper feeding device for feeding a web from a web,
A printing device for printing on the web fed out from the paper feeding device;
A drying device for drying the web printed by the printing device;
A cooling device that winds and cools the web dried by the drying device around a cooling cylinder;
A folding device for forming a signature by cutting and folding the web cooled by the cooling device;
A paper discharge device for discharging the signature formed by the folding device;
In a printing press comprising:
Airflow promoting means for accelerating the flow of airflow in the vicinity of the web winding start position by the cooling cylinder is provided,
A printing machine characterized by that. A paper feeding device for feeding a web from a web,
A surface treatment agent supply device for supplying a surface treatment agent to the web fed from the paper feeding device;
A drying device for drying the ground treatment agent supplied to the web;
A rotating body for winding and transporting the web dried by the drying device;
A printing press comprising:
Airflow promoting means for accelerating the flow of airflow in the vicinity of the web winding start position by the rotating body is provided,
A printing machine characterized by that.

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