JP3020495B1 - Plate cylinder fill and plate cylinder with plate cylinder fill - Google Patents

Abstract

Abstract: [PROBLEMS] In printing on a spread face of newspaper, dirt having a contour of an opening edge of a concave portion of a plate cylinder mark attaching portion or a circular contour of a counterbore hole portion is generated, and waste paper increases due to the dirt. However, there is a problem that print quality is deteriorated. SOLUTION: A plate cylinder filling 2 is attached to a plate cylinder mark attaching portion 10 of a plate cylinder 1 by closing an outer peripheral surface portion of a plate cylinder. It has an outer surface 20 to be aligned and an insertion hole 23 having an opening 230 in the outer surface 20. The opening portion 230 of the insertion hole 23 covers the printing plate 4
Opening 2 of the printing plate 4 by the printing pressure acting during the printing operation of
The portion corresponding to 30 has a size that does not exceed the elastic limit and cause deformation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rotary printing press, and more particularly, to a plate cylinder filling and a printing cylinder mounted on a plate cylinder of a rotary printing press capable of printing on left and right pages of a spread surface using a thin plate printing plate. The present invention relates to a plate cylinder having a refill. More specifically, a plate cylinder fill which is attached to an opening of a plate cylinder mark attaching portion used for a plate cylinder of a newspaper offset rotary printing press so as not to stain the printing paper, and a plate having the plate cylinder fill. About the torso.

[0002]

2. Description of the Related Art Conventionally, in a rotary press for newspapers, a machine number or the like is printed on a printing paper so that each printing paper can be identified by a printing unit of a printing machine. Attached to the plate cylinder ("Newspaper Printing Handbook", April 10, 1997).
Published by The Japan Newspaper Association, page 59).
As the “plate cylinder mark”, there are known those in which a base member and a printing member having a mark stamp surface are integrally formed, and those which are separately formed and used in combination. As a prior art of the "plate cylinder mark" formed separately and used in combination, the one disclosed in Japanese Utility Model Publication No. 56-52045 (Prior Art 2) is known.

As shown in FIG. 9, the front and back sides of a newspaper are usually printed by a printing unit of a rotary printing press composed of two sets each including a black ink cylinder 1 and a blanket cylinder B. You. One of the plate cylinders 1 of the printing unit is provided with the plate cylinder mark attaching unit 1.
0, the plate cylinder mark 5 can be attached and detached. As shown in FIG. 7, the plate cylinder mark 5 includes a base member 50 and a printing member 51, and a counterbore 52 in which a head of a bolt for attaching the plate cylinder mark 5 to the plate cylinder mark mounting portion 10 is received.
Is provided on the upper surface side. Then, a mark printing surface 510 located on the printing drum 51 surface side of the printing member 51 of the printing drum mark 5.
Has the same height as the surface of the printing plate 4, and is provided so as to be printed in a central margin portion, which is a margin between adjacent pages of a newsprint surface to be printed on the printing paper W two consecutive pages in the horizontal direction. ing.

[0004] The newspaper N is overlapped with one or a plurality of printing paper surfaces printed by one or a plurality of printing units, folded and discharged from the folding unit. Then, a printing unit for printing a so-called double-page spread 0 is determined each time by a page or a paper format on the day. In a newspaper offset rotary printing press, a wide thin printing plate that can be used for full-page spread printing, for example, a two-page printing plate (hereinafter referred to as a "double-width printing plate") 4 is attached to the plate cylinder 1 for printing. In this case, in order to prevent the mark printing surface 510 of the printing member 51 of the plate cylinder mark 5 from being printed, the following conventional method is used.
It was known that the device would respond. Printing is performed with the plate cylinder mark 5 attached to the plate cylinder 1 being detached from the plate cylinder mark attaching section 10 (prior art 1). As disclosed in Japanese Utility Model Publication No. 56-52045, the printing member 51 having the mark stamp surface 510 is removed from the base member 50 of the plate cylinder mark 5, and only the base member 50 shown in FIGS. 11 and 12 is used. Printing (Prior Art 2). As shown in FIG. 13 and FIG.
0, the plate cylinder mark 5 is removed and replaced with a fill 6 without a mark stamp surface having a curved surface matching the outer peripheral surface 11 of the plate cylinder 1 (prior art 3).

[0005]

[Problems to be Solved by the Invention] Prior Art 1 to 3
Had several problems to be solved, respectively, as follows. In prior art 1, a double-width printing plate 4 is provided on a plate cylinder 1 with a plate cylinder mark 5 removed from a plate cylinder mark attaching portion 10.
Is attached and printed. Plate cylinder mark attachment part 10
When the plate cylinder mark 5 is removed from the plate cylinder mark mounting portion 10, a relatively large concave portion is opened in the outer peripheral surface 11 of the plate cylinder 1. For example, a concave portion having a length of 36 mm, a width of 6 mm, and a depth of approximately 10 mm opens in the outer peripheral surface 11 of the plate cylinder 1 in the circumferential direction of the plate cylinder 1. The double-width printing plate 4 mounted on the outer peripheral surface 11 of the plate cylinder including the opening of the concave portion of the plate cylinder 1
Is pressed against the plate cylinder outer peripheral surface 11 with a large force by a printing pressure set between the blanket cylinder B and the blanket cylinder B. The force is applied repeatedly from the front side of the double-width printing plate 4. Therefore, the double-width printing plate 4 is dented and deformed along the periphery of the opening of the plate cylinder mark attaching portion 10 which is a concave portion of the plate cylinder outer peripheral surface 11. If the portion is an image portion, a larger amount of ink is received than usual, and if the portion is a non-image portion, the hydrophilic portion is damaged and sensitized. The excess ink supplied to these recesses and the ink supplied to the newly sensitized portion are transferred to the blanket and printed on the printing paper W, and as a result, the concave portions of the plate cylinder mark attaching portion 10 are removed. Contamination with the contour of the periphery of the opening occurs. There has been a problem that the occurrence of such stains increases the number of waste sheets and results in a print having poor print quality. Further, there is a problem that the consumption of the double-width printing plate 4 increases.

Further, prior art 2 shown in FIGS.
The printing member 5 of the plate cylinder mark 5 is attached to the plate cylinder mark attaching portion 10.
Only the base member 50 from which No. 1 has been removed is attached. In Prior Art 2, the outer surface 500 of the base member 50 is
1, the outer peripheral surface 11 of the plate cylinder 1
It is provided recessed inward. For this reason, there is a gap between the outer surface 500 of the base member 50 and the lower surface of the printing plate 4 mounted so as to cover the outer surface 500. Furthermore, the counterbore holes 54 for the heads 30 of the two bolts (fastener members) 3 for attaching the base member 50 to the plate cylinder mark mounting portion 10 of the plate cylinder 1 remain largely exposed on the surface. ing. The double-width printing plate 4 mounted on the outer peripheral surface 11 of the plate cylinder including the outer surface 500 of the base member 50 of the plate cylinder 1 has a large force applied by the printing pressure set between the blanket cylinder B and the outer peripheral surface of the plate cylinder. Since it is pressed against the surface 11, a large reaction force is repeatedly applied from the front side of the double-width printing plate 4 from the elastic blanket wound around and attached to the blanket cylinder B during the printing operation. Therefore, the double-width printing plate 4 is a plate cylinder 1 on which the base member 50 is mounted.
The bolt head 3 which is deformed along the periphery of the opening of the plate cylinder mark attaching portion 10 and has the base member 50 attached thereto.
Two portions covering the counterbore holes 54, 54 for 0, 30 are dented and deformed. If the part is an image part, a larger amount of ink is received than usual, and if the part is a non-image part,
The hydrophilic portion is damaged to make it oil-sensitive. The excess ink supplied to these concave portions and the ink supplied to the newly sensitized portion are transferred to the blanket and printed on the printing paper W, and as a result, the concave portions of the plate cylinder mark attaching portion 10 are formed. Dirt having the contour of the periphery of the opening and the circular contour of the counterbore 54 is generated. There has been a problem that the occurrence of such stains increases the number of waste sheets and results in a print having poor print quality. Further, there is a problem that the consumption of the double-width printing plate 4 increases.

Further, prior art 3 shown in FIGS.
Removes the plate cylinder mark 5 from the plate cylinder mark mounting portion 10 and replaces it with a filling metal 6 having no mark stamping surface 510 and having an outer surface 60 having a curved surface matching the outer peripheral surface 11 of the plate cylinder 1, and has a double width. In this configuration, the printing plate 4 is attached and printing is performed. This prior art 3 is such that the filling 6 has two bolts 3, 3.
The bolts 3 are attached to the plate cylinder mark attaching portion 10 by means of the bolts 3. According to the configuration of the prior art 3, the double width printing plate 4 is supported on the outer surface 60 as in the prior arts 1 and 2, so that the double width printing plate 4 extends along the periphery of the opening of the concave portion of the plate cylinder mark attaching portion 10 of the plate cylinder 1. Although the problem of deformation can be prevented,
Counterbore holes 61, 61 remain largely exposed on the surface. The double-width printing plate 4 mounted on the outer peripheral surface 11 of the plate cylinder 1 including the outer surface 60 of the filling 6 of the plate cylinder 1 has a large force applied by the printing pressure set between the blanket cylinder B and the outer peripheral surface of the plate cylinder. Since it is pressed against the surface 11, a large reaction force is repeatedly applied from the front side of the double-width printing plate 4 from the elastic blanket wound around and attached to the blanket cylinder B during the printing operation. Therefore, the double-width printing plate 4 has a counterbore 6 exposed on the surface of the filling 6.
The two portions covering 1 and 61 are dented and deformed. If the portion is an image portion, a larger amount of ink is received than usual, and if the portion is a non-image portion, the hydrophilic portion is damaged to make it sensitized. Excess ink supplied to these two concave portions and ink supplied to the newly sensitized portion are transferred to the blanket and printed on the printing paper W, and as a result, the counterbore holes 61 and 61 are formed. Two dirts D having a circular contour are generated. For example, as shown in FIG. 10, dirt D having two circular outlines as shown on a facing surface O of a newspaper N of full-page spread printing is produced and printed. There is a problem that the generation of the stain D increases the number of waste papers and results in a print having poor print quality. Further, there is a problem that the consumption of the double-width printing plate 4 increases.

Further, in the prior arts 2 and 3, when the base member 50 or the buried metal 6 is removed from the plate cylinder mark attaching portion 10 of the plate cylinder 1, the bolts 3 as fastener members are attached to the plate cylinder mark attaching portion. Since the bolts 3 are screwed into the female screw holes 12 opened in the bottom surface of the screw 10, the bolts 3 are first turned loose, and only the bolts 3 are pulled out from the female screw hole 12. After the work, there is a problem that the work of removing the base member 50 or the burying metal 6 from the plate cylinder mark attaching portion 10 by using a detachment bolt (not shown) which is a separate part is required.

[0009]

In order to solve the above-mentioned problems, the present invention can be mounted on and removed from a plate cylinder mark mounting portion of a plate cylinder of a rotary printing press. Attached, the outer surface aligned with the outer peripheral surface of the plate cylinder when attached to the plate cylinder mark mounting portion, and has an insertion hole having an opening in the outer surface, the opening of the insertion hole,
The part corresponding to the opening of the printing plate is set to a size that will not exceed the elastic limit and will not be deformed by the printing pressure applied during printing operation of the printing plate mounted on the plate cylinder outer peripheral surface while covering the opening. We propose a fill for the plate cylinder, which is characterized by being able to be used.

The size of the opening of the insertion hole is a circular opening having a diameter of 5 mm or less, and the fastener for attaching the shape of the plate cylinder to the plate cylinder mark mounting portion. The present invention proposes a plate cylinder filling, which is an insertion hole having a size in which a tool for operating a member can be inserted and a fastener member itself cannot be inserted.

[0011] Further, in a plate cylinder of a rotary printing press in which a plate cylinder mark and a plate cylinder filling can be replaced and attached to and removed from the plate cylinder mark attachment portion, the plate cylinder can be detachably attached to the plate cylinder mark attachment portion. An insert hole having an outer surface aligned with the outer peripheral surface of the plate cylinder while being attached to the plate cylinder mark attaching portion while closing the outer peripheral surface portion of the plate cylinder, and having an opening in the outer surface. The opening of the insertion hole covers the opening, and the portion corresponding to the opening of the printing plate has an elastic limit due to the printing pressure applied during the printing operation of the printing plate mounted on the outer peripheral surface of the plate cylinder. The present invention proposes a plate cylinder characterized in that the plate cylinder is provided in a size that does not cause excessive deformation.

[0012] Furthermore, the size of the insertion hole of the plate cylinder filling is a circular opening having a diameter of 5 mm or less, and the insertion hole of the plate cylinder filling is inserted into the plate cylinder filling. The present invention proposes a plate cylinder in which a tool for operating a fastener member for attaching gold to a plate cylinder mark mounting portion is insertable, and the fastener member itself is an insertion hole having a size that cannot be inserted.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Plate cylinder 1 according to an embodiment of the present invention.
Is a plate cylinder of a rotary printing press in which the plate cylinder mark 5 and the plate cylinder fill 2 (2a, 2b, 2c) can be attached to and detached from the plate cylinder mark mounting section 10 by replacement. Plate cylinder 1 of the present invention
Is used in a rotary printing press capable of printing a page on a printing plate 4 mounted on an outer peripheral surface 11 and printing a plate cylinder mark image by a plate cylinder mark 5 in a margin between pages.
The plate cylinder 1 according to the embodiment of the present invention has a plate cylinder fill 2 (2) which can be attached to and detached from the plate cylinder mark attaching portion 10.
a, 2b, 2c) are attached to the plate cylinder mark attaching portion 10 with the outer peripheral surface of the plate cylinder closed, and the outer surface 20 (20a) that is fitted to the plate cylinder mark attaching portion 10 and matches the outer peripheral surface 11 of the plate cylinder , 20b, 20c) and the outer surface 20 (2
0a, 20b, 20c) and an insertion hole 23 having an opening 230. The opening 230 of the insertion hole 23 is formed by the printing pressure acting during printing operation of the printing plate 4 mounted on the plate cylinder outer peripheral surface 11 so as to cover the opening 230.
Are provided in a size that does not cause deformation beyond the elastic limit.

FIG. 1 is a partial cross-sectional explanatory view of a plate cylinder 1 with a plate cylinder padding 2a attached thereto in a first embodiment according to the present invention, and a perspective view of the plate cylinder padding 2a seen from above. A description will be given based on FIG.

The plate cylinder filling 2a according to the first embodiment of the present invention has a cross section in which the filling outer surface 20 forms a curved surface matching the outer peripheral surface 11 of the plate cylinder 1 and opens to the lower surface 21 which is the inner side of the plate cylinder. The T-shaped grooves 22, 22 are formed in two places. Filler 2a for plate cylinder
Are attached to a plate cylinder mark mounting portion 10 which is a concave portion to which a plate cylinder mark (not shown in FIGS. 1 and 2) is attached and detached,
In place of the plate cylinder mark, the plate cylinder mark is attached by closing at least the outer peripheral surface of the plate cylinder. In this embodiment, the concave portion is filled. Attachment is performed by two bolts 3, 3, which are fastener members. In this embodiment, the bolt 3 is formed of a hexagonal bolt, but it is sufficient that the bolt 3 has a fitting portion on the upper surface of the bolt head 30 for fitting with a bolt turning tool. The plate cylinder filling 2a is attached to the plate cylinder mark mounting portion 10 by screwing bolts 3 and 3 into female screw holes 12 provided in the bottom surface of the plate cylinder mark mounting portion 10, respectively. The plate cylinder filling 2a penetrates from the T-shaped head of each of the T-shaped grooves 22, 22 to the outer surface 20a, and an opening 23 is formed in the outer surface 20a.
Two insertion holes 23 having a zero are provided. Another embodiment of the T-shaped groove 22 is the T-shaped groove 22 of this embodiment.
It may be a T-shaped groove in which the character is rotated 90 degrees in the horizontal direction.

The insertion hole 23 is large enough to receive a tip of a tool for operating the bolt 3 as a fastener member, for example, a bolt turning tool (not shown) such as a hexagon screwdriver, and the bolt 3 itself as a fastener member. Is of a size that cannot be inserted. Further, the insertion hole 23 is a cylindrical hole in this embodiment, and the diameter of the opening 230 is
A portion of the printing plate 4, which is generally used in an offset rotary printing press, for example, a portion corresponding to the opening 230 of the PS plate 4 of an aluminum plate material having a thickness of 0.3 mm, does not undergo deformation exceeding the elastic limit due to printing pressure during printing operation. It is a circle having a diameter of the same. When using the PS plate 4 made of an aluminum plate material having a thickness of 0.3 mm as in this embodiment, the insertion holes 23,
The circular diameter of the 23 openings 230, 230 is approximately 5 mm or less. Further, in the case of the embodiment using a hexagonal socket bolt as the bolt 3, since the head 30 of the bolt 3 and the bolt turning tool are used, the diameter of the bolt 3 becomes approximately one half of the normal counterbore diameter. The circular diameter of the opening 230 is 4 mm.

The plate cylinder fill 2a is turned alternately on the heads 30, 30 of the bolts 3, 3 incorporated in the T-shaped grooves 22, 22 by means of a bolt turning tool inserted from an insertion hole 23. By screwing the bolts 3 into the female screw holes 12 provided on the bottom surface of the mark attaching portion 10,
It is attached to the plate cylinder mark attaching portion 10.

Next, a second embodiment according to the present invention will be described with reference to FIG. 3, which is a partial cross-sectional explanatory view of a plate cylinder 1 to which a plate cylinder padding 2b is attached, and a perspective view of the plate cylinder padding 2b seen from above. A description will be given based on FIG.

The plate cylinder filling 2b according to the second embodiment of the present invention comprises an outer peripheral member 24b and a lower surface 2 of the outer peripheral member 24b.
40b, and a mounting plate 25b mounted on the mounting plate 40b. The outer peripheral member 24b has a curved outer surface 20b which closes the outer peripheral surface of the plate cylinder of the plate cylinder mark attaching portion 10 and which is aligned with the outer peripheral surface 11 of the plate cylinder 1. Ends 24 projecting below lower surface 240b on both sides in the circumferential direction
1b and 241b. The outer peripheral member 24b forms two recessed portions, bolt head storage portions 242b and 242b, which are recessed above the lower surface 240b.
0b to the bolt head storage portion 242b,
b has an insertion hole 23 having an opening 230. A female screw hole 243 is provided at the center of the lower surface of the outer peripheral member 24b.
In another embodiment, the end portions 241b, 241b of the outer peripheral member 24b may be provided on both sides in the longitudinal direction of the plate cylinder which are rotated by 90 degrees in the horizontal direction in this embodiment.

The mounting plate 25b is connected to the end 2 of the outer peripheral member 24b.
It is a plate-like body having the same plate thickness as the protrusion thickness of 41b, 241b, and is provided with two holes 250, 250 penetrating the plate thickness. At the center of the mounting plate 25b, a mounting hole 2 into which a mounting screw 26 for mounting the mounting plate 25b and the outer peripheral member 24b is inserted.
The mounting plate 25b and the outer peripheral member 24b are connected and integrally fixed by screwing the mounting screw 26 having a lower surface side as a screw head into the mounting hole 251 and the female screw hole 243. At this time, the bolts 3, 3 are previously inserted into the respective holes 250, 250 of the mounting plate 25b.
30 is assembled with the upper surface side.

A plate cylinder filling 2b formed by connecting the outer peripheral member 24b and the mounting plate 25b is attached to a plate cylinder mark mounting portion 10 to which a plate cylinder mark (not shown in FIGS. 3 and 4) is attached and detached, by a fastener member. Are attached by two bolts 3,3. In this embodiment, the bolt 3 is formed of a hexagonal bolt, but it is sufficient that the bolt 3 has a fitting portion on the upper surface of the bolt head 30 for fitting with a bolt turning tool.

The insertion hole 23 is large enough to receive a tip of a tool for operating the bolt 3 as a fastener member, for example, a bolt turning tool (not shown) such as a hexagonal screwdriver, and the bolt 3 itself as a fastener member. Is of a size that cannot be inserted. Further, the insertion hole 23 is a cylindrical hole in this embodiment, and the diameter of the opening 230 is
A portion of the printing plate 4, which is generally used in an offset rotary printing press, for example, a portion corresponding to the opening 230 of the PS plate 4 of an aluminum plate material having a thickness of 0.3 mm, does not undergo deformation exceeding the elastic limit due to printing pressure during printing operation. It is a circle having a diameter of the same. When using the PS plate 4 made of an aluminum plate material having a thickness of 0.3 mm as in this embodiment, the insertion holes 23,
The circular diameter of the 23 openings 230, 230 is approximately 5 mm or less. Further, in the case of the embodiment using a hexagonal socket bolt as the bolt 3, since the head 30 of the bolt 3 and the bolt turning tool are used, the diameter of the bolt 3 becomes approximately one half of the normal counterbore diameter. The circular diameter of the opening 230 is 4 mm.

The plate cylinder filling 2b is fixed to two bolts 3 by a bolt turning tool inserted from the insertion holes 23,23.
3 by rotating the heads 30 and 30 alternately.
Bolts 3 and 3 are provided in female screw holes 12 and 12 provided on the bottom of
Is screwed into the plate cylinder mark mounting portion 10.

Next, a third embodiment according to the present invention will be described with reference to FIG. 5 which is a partial cross-sectional explanatory view of a plate cylinder 1 to which a plate cylinder padding 2c is attached, and a perspective view of the plate cylinder padding 2c viewed from below. A description will be given based on FIG.

The plate cylinder filling 2c according to the third embodiment of the present invention comprises an outer peripheral member 24c and a lower surface 2 of the outer peripheral member 24c.
The mounting plate 25c is mounted on the mounting plate 40c. The outer peripheral member 24c has a curved surface whose outer surface 20c closes the outer peripheral surface of the plate cylinder of the plate cylinder mark attaching portion 10 and is aligned with the outer peripheral surface 11 of the plate cylinder 1. Ends 24 projecting below lower surface 240c on both sides in the circumferential direction
1c and 241c are formed. Ends 241c, 241c
Has a shape that becomes wider inward toward the lower side, and an inverted trapezoidal mounting groove space is formed by the two inner slopes at the end and the lower surface 240c. The outer peripheral member 24c forms two bolt head storage portions 242c and 242c that are recessed above the lower surface 240c and open to the left and right side surfaces, and the bolt head storage portions 24 from the outer surface 20c.
It has insertion holes 23, 23 that penetrate to 2c and open an opening 230 in the outer surface 20c. End 241 of outer peripheral member 24c
As another embodiment, c and 241c may be provided on both sides in the longitudinal direction of the plate cylinder which are rotated by 90 degrees in the horizontal direction from this embodiment.

The mounting plate 25c is connected to the end 2 of the outer peripheral member 24c.
41c and 241c have the same plate thickness as the protruding thickness and have an end 241.
c, 241c is an inverted trapezoidal plate-like body having inclined surfaces on both sides corresponding to the inner slopes at the ends, and provided with two holes 250, 250 penetrating the plate thickness, and bolts in the holes 250, 250 The parts 3 and 3 are assembled in advance with the heads 30 and 30 facing upward.

The outer peripheral member 24c and the mounting plate 25c are mounted by sliding from either side so that the mounting space of the inverted trapezoid shape corresponds to the plate-like body. At this time, the holes 250, 250 of the mounting plate 25c are
Bolts 3, 3 are pre-installed, and heads 30, 30
Is inserted through the side opening of the bolt head storage portions 242c and 242c and slides into the bolt head storage portions 242c and 242c.
c.

The plate cylinder filling 2c, to which the outer peripheral member 24c and the mounting plate 25c are connected, is attached to the plate cylinder mark mounting portion 10 by closing at least the outer peripheral surface of the plate cylinder and filling up the recess. A bolt head storage portion 242c of the outer peripheral member 24c,
The bolts 3 and 3 incorporated in the holes 250 and 250 of the mounting plate 242c and the mounting plate 25c are hexagon socket head bolts in this embodiment. It is only necessary to have

The insertion hole 23 is large enough to receive a tip of a tool for operating the bolt 3 as a fastener member, for example, a bolt turning tool (not shown) such as a hexagon screwdriver, and the bolt 3 itself as a fastener member. Is of a size that cannot be inserted. Further, the insertion hole 23 is a cylindrical hole in this embodiment, and the diameter of the opening 230 is
A portion of the printing plate 4, which is generally used in an offset rotary printing press, for example, a portion corresponding to the opening 230 of the PS plate 4 of an aluminum plate material having a thickness of 0.3 mm, does not undergo deformation exceeding the elastic limit due to printing pressure during printing operation. It is a circle having a diameter of the same. When using a PS plate 4 made of an aluminum plate material having a thickness of 0.3 mm as in this embodiment, the insertion holes 2
The circular diameter of the openings 230, 230 of 3, 23 is approximately 5 m.
m or less. Further, in the case of the embodiment using a hexagonal socket bolt as the bolt 3, since the head 30 of the bolt 3 and the bolt turning tool are used, the diameter of the bolt 3 becomes approximately one half of the normal counterbore diameter. The circular diameter of the opening 230 is 4 mm.

[0030] The plate cylinder filling 2c is connected to the heads 30, 30 of the bolts 3, 3 incorporated in the bolt head storage portions 242c, 242c by the tips of the bolt turning tools inserted from the insertion holes 23, 23. The bolts 3, 3 are screwed into the female screw holes 12, 12 provided on the bottom surface of the plate cylinder mark mounting portion 10 alternately, whereby the plate cylinder mark mounting portion 10 is rotated.
Attached to.

Next, a first embodiment and a second embodiment of a plate cylinder 1 and a plate cylinder 2 having the plate cylinder fill of the present invention will be described.
Embodiment 2 and 2 of the third embodiment.
The action common to b and 2c) will be described. Outer surfaces 20a, 20b, 20c of plate cylinder fills 2a, 2b, 2c
The lower surface of the printing plate 4 attached to the plate cylinder 1 is closed because the outer peripheral surface of the plate cylinder of the plate cylinder mark attaching portion 10 is closed, and the curved surface is aligned with the outer peripheral surface 11 of the plate cylinder 1 without any unevenness. Can be uniformly supported as in the case of the outer peripheral surface 11.

Further, when removing the plate cylinder fills 2a, 2b, 2c from the plate cylinder mark mounting portion 10 of the plate cylinder 1, two bolts are inserted by a bolt turning tool (not shown) inserted from the insertion hole 23. By rotating and loosening the heads 3 and 3 alternately, the upper surfaces of the heads 30 and 30 become T-shaped grooves 2.
2 (first embodiment) or bolt head storage section 242b
(2nd Embodiment) Or, each hits the inner upper surface of the bolt storage groove 242c (3rd Embodiment) and pushes up the plate cylinder fills 2a, 2b, 2c from below. By pushing up the head 30 of the bolt 3 alternately little by little by the two bolts 3, the plate cylinder filling 2 is raised while keeping it parallel to the plate cylinder outer peripheral surface 11, and smoothly. It can be removed.

Next, referring to FIG. 8, description will be given of an opening 230 opened in the outer surface 20 of the insertion hole 23 common to the first embodiment, the second embodiment and the third embodiment of the present invention.
The diameter of the opening 230 of the insertion hole 23 is such that a printing plate (double-width printing plate) 4 usually used in an offset rotary printing press, for example, a PS plate of an aluminum plate material having a thickness of 0.3 mm is inserted into the insertion hole 2.
The size of the opening 2 does not cause deformation exceeding the elastic limit due to printing pressure. In the embodiment of the present invention, the thickness is set to 0.
When using a 3 mm aluminum plate PS plate, the opening 230 of the insertion hole 23 is approximately 5 mm or less. Further, in the case of the embodiment using a hexagonal socket bolt as the bolt 3, since the head 30 of the bolt 3 and the bolt turning tool are used, the diameter of the bolt 3 becomes approximately one half of the normal counterbore diameter. The diameter of the opening 230 of the insertion hole 23 is 4 mm.

FIG. 8 shows the printing cylinder fillings 2a, 2b, 2c attached to the printing cylinder 1 by the action of the printing pressure during the printing operation.
6 is a graph showing the relationship between the opening diameter mm of the opening 230 of the insertion hole 23, the maximum displacement mm generated in the printing plate 4 mounted thereon, and the maximum Mises stress N / mm2. This graph shows that when a PS plate having a thickness of 0.3 mm is used as the printing plate 4 generally used in a newspaper rotary printing press, P
Deformation (maximum displacement) and stress (maximum Mises stress) of S plate
Is a result of verifying in detail by a linear P method analysis using a computer.

According to the graph of FIG.
Is the diameter mm of the opening 230 of the printing plate (PS
The maximum displacement mm of the printing plate (plate) is taken, and the maximum Mises stress N / mm2 of the printing plate (PS plate) is taken on the right vertical axis, and it can be seen that the opening diameter changes as a parameter.
That is, when the opening diameter exceeds about 5 mm,
As the maximum displacement of the portion of the printing plate 4 covering the opening 230 starts to increase rapidly, the maximum Mises stress generated in the printing plate 4 also sharply decreases in the vicinity of this, and the printing plate 4 in this portion deforms beyond the elastic limit. To begin to do.

Accordingly, a printing plate having a thickness of 0.3 mm (PS
When the printing plate 4 is used, by providing the diameter of the opening 230 of the insertion hole 23 of the plate cylinder fillings 2a, 2b, and 2c to be approximately 5 mm or less, the printing plate 4 can apply the printing pressure applied during printing operation. Due to this, no deformation exceeding the elastic limit is caused. In addition, since the printing plate 4 has improved durability against the printing pressure, an appropriate amount of ink is not transferred onto the printing plate 4 and stains D are not generated, thereby reducing waste paper.

[0037]

Advantages of the Invention The double-width printing plate can evenly contact the outer surface of the plate cylinder fill, making it possible to use the same way as in the past, such as the recess in the plate cylinder mark mounting part and the counterbore in the bolt head of the conventional fill. The lack of recesses of the size eliminated the conventional plate from deforming beyond its elastic limits in those areas. 2. The proper amount of ink has been transferred to the printing plate. 3. The durability of the printing plate has been improved. 4. Since there is no local ink density unevenness on the printing paper at the part where the plate cylinder fill is attached, there is no loss of paper, the print quality is improved, and the spread spread without stains is easy. Was obtained. 5. The operation procedure for removing the plate cylinder fill from the plate cylinder has been simplified, and work efficiency has been improved.

[Brief description of the drawings]

FIG. 1 shows a plate cylinder and a plate cylinder fill in a first embodiment of the present invention, and is a partial sectional view of the plate cylinder in a state where the plate cylinder fill is attached to a plate cylinder mark mounting portion.

FIG. 2 is a perspective view of the plate cylinder burring according to the first embodiment of the present invention, showing the plate cylinder burring viewed obliquely from above.

FIG. 3 shows a plate cylinder and a plate cylinder fill in a second embodiment of the present invention, and is a partial sectional view of the plate cylinder in a state where the plate cylinder fill is attached to a plate cylinder mark mounting portion.

FIG. 4 is a perspective view of a plate cylinder burying metal according to a second embodiment of the present invention, showing the plate cylinder burying metal as viewed from obliquely below.

FIG. 5 is a partial cross-sectional view of a plate cylinder and a mold blank for a plate cylinder according to a third embodiment of the present invention in a state in which the mold blank for a plate cylinder is attached to a mold cylinder mark attaching portion.

FIG. 6 is a perspective view of a plate cylinder burying metal according to a third embodiment of the present invention, showing the plate cylinder burying metal from obliquely below.

FIG. 7 is a perspective view of a plate cylinder mark that can be attached to and detached from the plate cylinder mark attachment portion of the plate cylinder as viewed from obliquely above.

FIG. 8 shows the effect of the printing pressure during the printing operation on the opening diameter mm of the opening of the insertion hole of the filling cylinder for the plate cylinder attached to the plate cylinder and the printing plate (PS plate) mounted thereon. Graph showing the relationship between the maximum displacement mm and the maximum Mises stress N / mm2 by linear P method analysis using a computer

FIG. 9 shows a prior art, and is an explanatory view of a printing unit of a rotary printing press using a plate cylinder equipped with a conventional filling metal (prior art 3).

FIG. 10 is a perspective view of a two-page spread of a 16-page newspaper printed by the rotary printing press shown in FIG. 9;

FIG. 11 shows a prior art (Prior Art 2), and is a partial sectional view of a plate cylinder in a state where only a base member of the plate cylinder mark is attached to a plate cylinder mark attaching portion.

FIG. 12 shows a prior art (Prior Art 2), in which only a base member of a plate cylinder mark is attached to a plate cylinder mark attaching portion (excluding a printing plate).

FIG. 13 shows a prior art (Prior Art 3), and is a partial sectional view of a plate cylinder in a state where a conventional filling metal is attached to a plate cylinder mark attaching portion.

FIG. 14 shows a prior art (Prior Art 3), and is a plan view of a state where a conventional filling metal is attached to a plate cylinder mark attaching portion (excluding a printing plate).

[Explanation of symbols]

 Reference Signs List 1 plate cylinder 10 plate cylinder mark attaching portion 11 plate cylinder outer peripheral surface 12 female screw hole 2 (2a, 2b, 2c) plate cylinder filling 20 (20a, 20b, 20c) outer surface 21 lower surface 22 T-shaped groove 23 insertion hole 230 opening Parts 24b, 24c Outer peripheral members 240b, 240c Lower surfaces 241b, 241c Ends 242b, 242c Bolt head storage portions 243 Female screw holes 25b, 25c Mounting plate 250 holes 251 Mounting holes 26 Mounting screws 3 Bolts 30 Head 4 Printing plate (PS plate) 5) Plate cylinder mark 50 Base member 500 Base member outer surface 51 Printing member 510 Mark stamping surface 52 Counterbore hole 54 Counterbore hole 6 Filler 60 Filler outer surface 61 Counterbore B Blanket cylinder D Dirt N Newspaper O Facing surface W Printing paper

Claims (6)

(57) [Claims] 1. A rotary printing press, which can be attached to and detached from a plate cylinder mark attaching portion of a plate cylinder, and is attached to the plate cylinder mark attaching portion by closing the outer peripheral surface of the plate cylinder, and attached to the plate cylinder mark attaching portion. The printing operation of a printing plate having an outer surface aligned with the outer peripheral surface of the plate cylinder in the state and an insertion hole having an opening in the outer surface, the opening of the insertion hole covering the opening and being mounted on the outer peripheral surface of the plate cylinder. A plate cylinder filling, characterized in that a portion corresponding to an opening of a printing plate is provided in such a size that the portion corresponding to the opening of the printing plate does not exceed its elastic limit and is not deformed by the printing pressure acting thereon. 2. The size of the opening of the insertion hole is 5 mm in diameter.
2. The plate cylinder filling according to claim 1, which has the following circular opening. 3. An insertion hole having a size such that a tool for operating a fastener member for attaching a plate cylinder fill to a plate cylinder mark attaching portion can be inserted, and the fastener member itself cannot be inserted. The filling for a plate cylinder according to claim 1 or 2, which is: 4. A plate cylinder of a rotary printing press, wherein a plate cylinder mark and a plate cylinder fill are exchangeably attached to and detachable from a plate cylinder mark attachment portion, the plate cylinder being detachably attachable to a plate cylinder mark attachment portion. An insert hole having an outer surface aligned with the outer peripheral surface of the plate cylinder while being attached to the plate cylinder mark attaching portion while closing the outer peripheral surface portion of the plate cylinder, and having an opening in the outer surface. The opening of the insertion hole covers the opening, and the portion corresponding to the opening of the printing plate has an elastic limit due to the printing pressure applied during the printing operation of the printing plate mounted on the outer peripheral surface of the plate cylinder. A plate cylinder characterized by being provided in a size that does not cause excessive deformation. 5. The plate cylinder according to claim 4, wherein the size of the opening of the insertion hole of the plate cylinder filling is a circular opening having a diameter of 5 mm or less. 6. A tool for operating a fastener member for attaching the plate cylinder fill to the plate cylinder mark mounting portion can be inserted into the insertion hole of the plate cylinder fill, and the fastener member itself cannot be inserted. The plate cylinder according to claim 4 or 5, wherein the plate cylinder has a certain size.