JP3053995U - Liquid treatment roller for printing - Google Patents

Abstract

(57) Abstract: An object of the present invention is to provide a printing liquid processing roller capable of sufficiently processing the supply of a liquid such as an etching liquid, water, or ink. A groove (1) is provided on a rolling surface (12a) of an upper roller (12).
Since grooves 8 and 19 are engraved, when the excess etching liquid is squeezed out of the master paper M, these grooves 18 and 1 are formed.
Since the etching liquid is held inside 9, the etching liquid E can be sufficiently applied to the master paper M, and the master paper can be made to react reliably. Further, since the application amount of the etching solution can be increased, the operation speed can be increased.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to a liquid processing roller for printing used in an offset lithographic printing press and an etching processor for etching a master paper used in the printing press in a pre-printing process.

[0002]

[Prior art]

 2. Description of the Related Art Conventionally, offset lithographic printing has been known as one of printing techniques. In this technology, a master paper (printing original plate) that has been made hydrophilic by performing an etching process is attached to a master cylinder (plate cylinder), and water and ink are sequentially supplied to the master paper. Ink is left only in the image part, the image is transferred from the master paper to the blanket cylinder (rubber cylinder), and the transferred image is printed on the paper sent between the impression cylinder (impression cylinder). .

[0003]

[Problem to be solved by the invention]

 By the way, in such a printing technique, when an etching process is performed on a master paper or when water or ink is supplied to a master paper, a printing liquid processing roller is used to apply an etching solution or to apply an etching solution. However, since the rolling surface is formed with a smooth surface in the conventional printing liquid processing roller, liquids such as etching liquid, ink, and water adhere to the roller in a film form. However, the amount of adhesion was inevitably formed thin.

[0004] For this reason, when performing an etching process on the master paper, when the ambient temperature of the workplace is high or when the humidity is low, the etching liquid is dried quickly, and the master paper can be sufficiently removed only once. It is not possible to react, and it is necessary to repeat the work process two or three times, the work process increases, and when printing, when supplying ink or water to the master paper, use water or ink. Cannot be supplied sufficiently, the boundary between the image portion and the non-image portion becomes unclear, and there is a problem that the printed image is not sufficiently printed on the paper.

[0005] In particular, when the work speed is increased, the amount of adhesion is further reduced, and this problem becomes remarkable. Therefore, the work speed cannot be increased.

The present invention has been made in view of the above problems, and has as its object to provide a printing liquid processing roller capable of sufficiently processing the supply of a liquid such as an etching solution, water, or ink.

[0007]

[Means for Solving the Problems]

 In order to solve the above problems, the present invention is configured as follows. The invention according to claim 1 is a printing liquid processing roller configured to rotate when the apparatus is operated, and to process supply of a liquid on a rolling surface with respect to an object to be contacted. Characterized in that a concave holding portion for holding a predetermined amount is formed.

According to a second aspect of the present invention, in the printing liquid processing roller according to the first aspect, the concave holding portion is formed with a rough surface.

According to a third aspect of the present invention, in the printing liquid processing roller according to the first aspect, the concave holding portion is formed by a plurality of grooves.

According to a fourth aspect of the present invention, in the printing liquid processing roller according to the first, second or third aspect, the concave holding portion is formed in a spiral shape.

According to a fifth aspect of the present invention, there is provided an etching processor for applying a printing liquid processing roller according to the first, second, third or fourth aspect to an etching solution by applying an etching solution to a printing original plate. It is characterized by being used for an etching roller.

According to a sixth aspect of the present invention, a printing liquid processing roller according to the first, second, third, or fourth aspect is applied to a supply roller for supplying moisture to a printing original plate in an offset lithographic printing press. It is characterized in that it is used.

[0013]

[Action]

 According to the printing liquid processing roller of the first aspect, since the concave holding portion for holding the predetermined amount of the liquid is formed on the rolling surface, the concave holding portion is formed on the smooth rolling surface as well as on the rolling surface. Liquid is retained. Therefore, the retained liquid can be treated as an increased amount, and the amount of treated liquid can be increased.

According to the printing liquid processing roller of the present invention, since the concave holding portion for holding the liquid is formed with the rough surface, the liquid can be further held on the rough surface in addition to the smooth surface.

According to the third aspect of the present invention, since the concave holding portion for holding the liquid is formed by the plurality of grooves, the liquid can be further held by the plurality of grooves in addition to the flat surface. .

According to the printing liquid processing roller of the present invention, since the concave holding portion for holding the liquid is formed in a spiral shape, the concave holding portion comes into contact with the contacted object during the rotation of the roller. In order to uniformly displace in the width direction in the moving surface, it is possible to uniformly increase the amount of liquid over the entire surface of the object to be treated.

According to the printing liquid processing roller of the present invention, since the roller having the concave holding portion is used as the etching roller of the etching processor, it is possible to increase the holding amount of the etching liquid.

According to the printing liquid processing roller of the present invention, since the roller having the concave holding portion is used as the supply roller for supplying the water of the offset lithographic printing press, the amount of water to be supplied is increased. Can be done.

[0019]

[Effect of the invention]

 According to the present invention, since the concave holding portion is formed on the rolling surface, the liquid can be held on the concave holding portion in addition to the smooth surface of the rolling surface, and the amount of liquid supply processing can be increased. it can. As a result, the etching process and the printing operation can be performed reliably even in a place where the ambient temperature is likely to change or in the season, and the operation speed can be increased.

Further, when the concave holding portion is formed with a rough surface, it is not necessary to form a large concave portion on the rolling surface while increasing the supply processing amount of the liquid, which complicates the manufacturing process. It can be easily manufactured without doing.

Further, when the concave holding portion is formed of a plurality of grooves, the amount of liquid increase can be adjusted by changing the depth, the number of grooves, and the like, thereby further increasing use needs. Becomes possible.

In particular, when the concave holding portion is formed in a spiral shape, the concave holding portion is required to be uniformly displaced in the width direction within the rolling surface that comes into contact with the contacted object during the rotation of the roller. Thus, it is possible to uniformly increase the amount of liquid over the entire surface of the object to be treated. Therefore, the effect of the concave holding portion can be more effectively obtained.

When such a concave holding section is formed on an etching roller of an etching processor, the etching liquid can be held in the concave holding section in addition to the smooth rolling surface, so that the printing plate can be sufficiently etched. The liquid can be left, and the etching process can be performed effectively.

On the other hand, when such a concave holding portion is formed in a supply roller for supplying water of an offset lithographic printing press, it is possible to supply water sufficiently, and the image portion and the non-image portion of the printing original plate can be separated. The boundaries can be clarified, and the printed image can be clearly printed on paper.

[0025]

【Example】

 Embodiments of the present invention will be described in detail with reference to the following drawings. FIG. 1 is an overall perspective view of an etching processor P employing a printing liquid processing roller of the present invention.

The etching processor P includes a main body 1 and a cover 2, and an opening 3 for taking in a master paper M, which is a printing original, into the etching processor P is formed in the front of the cover 2. A guide plate 4 for guiding the master paper P to the insertion slot 3 is attached in front of the insertion slot 3. An outlet 5 for taking out the etched master paper M from the etching processor P is formed in the upper rear portion of the cover 2, and a guide plate 6 is attached similarly. Further, switches 7 and 8 for operating the etching processor are provided on the front surface of the main body 1.

FIGS. 2, 3 and 4 show the internal structure of the etching processor P. FIG. FIG. 2 is an internal structural view of the casing 9 with a cover 2 removed and a part of the casing 9 cut away. FIG. 3 is a sectional view taken along line AA of FIG. 2, and FIG.

Inside the etching processor P, a liquid reservoir 10 is formed on the upper surface of the main body 1, and the etching liquid E is injected into the liquid reservoir 10, thereby forming an etching liquid storage tank 11.

A pair of etching rollers 12, 13, which are arranged laterally in the width direction, are rotatably supported at both ends by bearings 14 fixed to the main body 1 at the upper rear part of the etching solution storage tank 11. I have.

The rolling surfaces of the pair of etching rollers 12 and 13 are both covered with a rubber member having elasticity, and both rollers 12 and 13 are mutually tensioned by a spring belt 15 wound around both ends. The two rollers 12, 13 are configured to rotate in conjunction with each other via a drive gear (not shown).

Of the pair of etching rollers 12 and 13, the lower roller 13 located on the lower side is rotationally driven via a drive shaft 17 by a drive motor 16 fixed to the main body 1, and is located on the upper side. The master paper M to which the etching liquid E is attached is pulled up from the etching liquid storage tank 11 together with the upper roller 12 to be applied, and the etching liquid E is applied to the master paper M.

Of the pair of etching rollers 12, 13, grooves 18, 19 serving as concave holding portions are formed in the rolling surface 12 a of the upper roller 12 which comes into contact with the printing plate on which the print image is printed. The detailed structure of the upper roller 12 is shown in FIG.

As shown in FIG. 5, two grooves 18 and 19 are spirally formed on the rolling surface 12 a of the upper roller 12 at equal intervals. This groove has a substantially rectangular shape and a depth of 0.3 to 0.5 mm, and is formed over the entire surface of the rolling surface 12a. Reference numeral 20 denotes a bearing groove, and reference numeral 21 denotes a belt hanging groove.

Next, a description will be given of an etching process performed by the etching processor configured as described above. First, the master paper M before the etching process is inserted into the etching processor P from the insertion opening 3 formed in the front surface of the cover portion 2 and passed through the etching solution storage tank 11 along the path indicated by a dashed line, thereby obtaining the master paper. The etching liquid E is attached to the paper M. The master paper M to which the etching liquid E is adhered is sandwiched between the pair of etching rollers 12 and 13, and the upper roller 12 and the lower roller 13 are driven to rotate by the driving motor 16, thereby removing the excess etching liquid E. Then, the etching liquid E is applied to the master paper M, and the master paper M is carried out so as to be taken out from the outlet 5.

In this work process, since the grooves 18 and 19 are formed on the rolling surface 12 a of the upper roller 12 as described above, when the etching liquid is applied to the master paper M, the grooves 18 and 19 are formed. , 19, the etching liquid is held on the plate surface of the master paper M, and the master paper can be made to react reliably.

Further, since the amount of the applied etchant can be increased, the rotation speed of the etching rollers 12 and 13 can be increased to increase the working speed of the etching process.

Further, since the grooves 18 and 19 are spirally cut as described above, the grooves 18 and 19 are formed in the rolling surface that comes into contact with the master paper M during the rotation of the roller. In addition, since it is uniformly displaced in the width direction, the etching liquid can be applied uniformly over the entire surface of the master paper M.

It is to be noted that the deeper the groove is formed, the more the amount of the etching solution held in the groove can be increased. Therefore, when the groove is further deeply formed, even if the working speed is further increased, it is sufficient. Can react with the master paper. In addition, even if the number of grooves is increased or the width of the grooves is set to be large, the holding amount of the etching solution can be similarly increased, and the same effect can be obtained.

FIG. 6 shows an upper roller 22 according to another embodiment. The roller is provided with two spirally substantially semicircular grooves 23 and 24 in the direction of rotation opposite to each other so as to cross each other. By setting the spiral grooves in reverse in this way, if the spiral grooves are engraved in the same direction, the master paper that may be generated due to the influence of the spiral grooves may be fed out. The sliding displacement in the direction can be surely eliminated by each groove canceling out the displacement force.

In the above embodiment, the groove is formed only in the upper roller. However, the present invention is not limited to this. The groove is formed only in the lower roller or both rollers. May be provided. Also, the shape of the groove may be engraved in a triangular shape, a semicircular shape, or the like. Also, many small depressions may be formed.

Next, an embodiment in which the printing liquid processing roller of the present invention is adopted in an offset lithographic printing press will be described with reference to FIGS. FIG. 7 is an operation schematic diagram of a roller group provided inside the offset lithographic printing press O. As shown in this figure, the etched master paper M is wound around a master cylinder (plate cylinder) 25, and the master cylinder M is configured to rotate counterclockwise as indicated by an arrow. Further, two liquid supply rollers 26 and 27 are provided so as to be in contact with the master cylinder 25 and the master paper M. These rollers 26 and 27 supply ink and water from an ink supply roller group 29 for conveying and supplying ink from an ink supply unit 28 and a water supply roller group 31 for conveying and supplying dampening water from a water container 30. Then, ink and water are supplied to the master paper M to generate a print image on the master paper.

The printed image generated on the master paper is transferred to a rolling surface 34 of a blanket cylinder (rubber cylinder) 32 on which rubber 33 is attached, and the transferred image is transferred to an impression cylinder (impression cylinder). The printing is performed by rotating each of the cylinders 32 and 35 in the direction indicated by the arrow on the printing paper 36 interposed between the printing paper 36 and the printing paper 36.

Of the above-mentioned roller group, a water supply roller group 31 for conveying and supplying dampening water from the water container 30 receives a rubber roller 31 r for directly taking in water from the water container 30 and a water supply from the rubber roller. Further, a metal chrome roller 31m for supplying to a downstream roller group is provided. Among them, a rough surface portion 37 as a spiral holding portion is formed on the rolling surface 31ra of the rubber roller 31r.

More specifically, as shown in FIG. 8, a roughened surface portion 37 is formed by applying a sandpaper having a surface roughness of about No. 60 to No. 150 on the rolling surface 31 Ra formed of a smooth surface. Is formed in a spiral shape (for convenience, the rough surface portion is shown with multiple points in the drawing). By forming the rough surface portion 37 in this manner, when supplying water, a large amount of water can be contained in the rough surface portion 37, so that the supply amount of water can be increased. As a result, the amount of water supplied to the master paper M can be increased, and it is possible to cope with changes in conditions such as ambient temperature and humidity. Therefore, the boundary between the image portion and the non-image portion can be made clear, and the print image can be clearly printed on paper. Further, since the rough surface portion 37 is formed in a spiral shape, the rough surface portion 37 is evenly displaced in the width direction in the rolling surface for supplying water during the rotation of the roller, and the water is transferred to the master paper. It can be supplied uniformly. Therefore, water can be increased uniformly with respect to the master paper.

In this embodiment, the roller of the water supply roller group has been described, but the same structure may be applied to the roller of the ink supply roller group.

The present invention is not limited to these specific structures, but is all encompassed, as long as a concave holding portion is provided on the rolling surface of the printing liquid treatment roller, and is particularly helical. However, the present invention is not limited to this, and the detailed structure may be appropriately changed.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of an etching processor P.

FIG. 2 is an internal structural view of the etching processor P of FIG. 1 with a part cut away.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is a sectional view taken along line BB of FIG. 2;

FIG. 5 is a partially detailed perspective view of an upper roller.

FIG. 6 is a partially detailed perspective view of an upper roller according to another embodiment.

FIG. 7 is an operation schematic diagram of a roller group provided inside the offset lithographic printing press.

FIG. 8 is a front view showing a detailed structure of a rolling surface of a rubber roller.

[Explanation of symbols]

 P ... Etching processor E ... Etching liquid 11 ... Etching liquid storage tank 12 ... Upper roller (liquid processing roller for printing) 12a ... Rolling surface 18,19 ... Groove (concave holding part) O ... Offset lithographic printing press 31r ... Rubber roller ( Liquid processing roller for printing) 31ra: rolling surface 37: rough surface portion (concave holding portion)

Claims (6)

[Utility model registration claims] 1. A printing liquid processing roller configured to rotate when an apparatus is operated and processing a supply of liquid on a contact surface with a rolling surface, wherein a predetermined amount of liquid is applied to the rolling surface. A liquid processing roller for printing characterized by forming a concave holding portion for holding the printing liquid. 2. A printing liquid processing roller according to claim 1, wherein said concave holding portion is formed with a rough surface. 3. The printing liquid processing roller according to claim 1, wherein said concave holding portion is formed by a plurality of grooves. 4. The printing liquid processing roller according to claim 1, wherein the concave holding portion is formed in a spiral shape. 5. An etching roller of an etching processor for applying an etching solution to a printing original plate and performing an etching process.
5. The printing liquid processing roller according to 3 or 4. 6. The printing liquid processing roller according to claim 1, wherein the roller is used as a supply roller for supplying water to a printing original plate in an offset lithographic printing press.