JPH01317788A - Plate cylinder for rotary stencil duplicator - Google Patents

Abstract

PURPOSE:To make the narrow partial printing of a printing region possible and to mount a plurality of housings on one printing press by making the thickness dimension parallel to the extending direction of a rotary axial line of each housing smaller than the max. diameter dimension thereof. CONSTITUTION:Each of housings 1is formed into such a flat cylindrical shape that the thickness dimension in the direction parallel to the extending direction of the rotary axis line thereof is smaller than the max. diameter dimension of said housing 1 and, even when a plurality of the housings 1 are mounted on one rotary shaft 4, they can be received in a space the same to or less than the dimension of the plate cylinder of a conventional rotary stencil duplicator. Then, printing inks different in hue are injected in the housings 1 from the respective injection ports 8 and, for example, red printing ink is injected in the leftmost housing 1 and blue printing ink is injected in the second housing 1 from the left while red printing ink is injected in the third housing 1 from the left and black ink is injected in the rightmost housing to mount the respective housings on one rotary shaft. When printing operation is executed in this state, printed matter classified by hue along the direction crossing the paper feed direction at the time of printing at a right angle can be obtained.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Industrial Application Field The present invention relates to a plate cylinder for a rotary copying machine that is capable of printing in a narrow area and simultaneously printing using printing inks of two or more colors. It is.

(B) Prior art The plate cylinder for a rotary copying machine which is well known in the past is known from Japanese Patent Application Laid-open No. 5B-6, for example.
As disclosed in Japanese Patent No. 9086, a single space much longer than the diameter is formed inside the casing having a shape similar to a cylindrical body. The printer is configured to be supplied with printing ink.

Therefore, in order to obtain printed matter in two or more colors, it was necessary to attach and detach the plate cylinder for each color and repeat printing on one sheet of paper as many times as there were colors.

Therefore, the interior of a single plate cylinder is divided into a plurality of ink storage chambers by partition walls, and printing inks of different colors are supplied to each of the ink storage chambers, so that printing can be performed simultaneously with printing inks of two or more colors. The applicant of the present application has already filed an application for a plate cylinder for a rotary copying machine capable of (see Japanese Patent Application No. 61-111246).

(c) Problems to be Solved by the Invention As mentioned above, in the plate cylinder for a rotary copying machine which is well known in the past, a single continuous space is formed inside the plate cylinder, so printing ink of two or more colors can be used. cannot be supplied to the plate cylinder of the rotary copying machine, and in order to obtain printed matter in two or more colors, it was necessary to attach and detach the plate cylinder for each color and repeat printing for the number of colors.

Therefore, as the number of colors increases, there has been a problem in that printing costs increase accordingly.

In particular, since the work of replacing plate cylinders is complicated, there are cases where a dedicated rotary copying machine is prepared for each color to perform printing work, but in such a case, a large number of rotary copying machines are required, and the total cost is This not only increases costs but also requires a large installation area.

In addition, in the plate cylinder for a rotary copying machine that the applicant has already proposed, as described above, the inside of a single plate cylinder is divided into a plurality of ink storage chambers by partition walls, and each ink storage chamber is divided into a plurality of ink storage chambers. It is possible to supply printing inks of different colors and print with printing inks of two or more colors at the same time.

However, in this plate cylinder for a rotary copying machine, once printing ink of a predetermined color is supplied to a specific ink storage chamber, as long as the plate cylinder for a rotary copying machine is used thereafter, the same color will always be used. Only c2 prints can be obtained.

Therefore, in order to obtain printed matter with different color classifications, it was necessary to prepare another plate cylinder for the rotary copying machine.

The present invention has been made in view of the problems of the prior art. as well as change the color coding (color, area,
The purpose of the present invention is to realize a plate cylinder for a rotary copying machine that is easy to change (position, etc.) and can be partially colored in different colors.

(d) Means for Solving the Problems The first main invention includes a cylindrical-like casing having a member that allows penetration of printing ink in at least the printing area of the circumferential side. The plate cylinder for a rotary copying machine is characterized in that the thickness of the casing in a direction parallel to the direction in which the axis of rotation extends is smaller than the maximum diameter of the casing.

The second main invention is that a plurality of cylindrical-like casings, each of which is equipped with a member that allows printing ink to penetrate into at least the printing area on the circumferential surface, can be attached to and detached from a single support shaft. This is the plate cylinder for a rotary copying machine that is installed.

The third main invention is that the thickness dimension of the casing in the direction parallel to the extending direction of the rotation axis is smaller than the maximum diameter dimension of the casing, and the end surfaces of the plurality of casings are This is a plate cylinder for a rotary copying machine, characterized in that the plate cylinders are arranged side by side so as to be in close contact with each other.

(E) Effect In the first main invention, since the thickness dimension of the housing in the direction parallel to the extending direction of the rotational axis is smaller than the maximum diameter dimension of the housing, the narrow part of the printing area Not only can printing become possible, but also multiple housings can be attached to one printing machine.

In the second major invention, since a plurality of casings are removably attached to the support shaft, it is possible to code multiple types of colors or change the width of a certain color by detaching and replacing the casings. becomes possible.

In the third main invention, the same effect as in the second main invention is performed.

In addition, in any of the inventions, color printing of two or more colors is possible at the same time, but in that case, the printed document image is color-coded along the direction perpendicular to the paper feeding direction during printing. Become.

(F) Embodiment Figures 1 to 4 are diagrams for explaining the first embodiment, in which Figure 1 is a partially sectional perspective view, Figure 2 is a longitudinal sectional view, and Figure 3 is a longitudinal sectional view. FIG. 4 is a longitudinal cross-sectional view showing a state in which each housing is separated, and FIG. 4 is a plan view of the printed matter.

In these figures, l is a housing having a shape similar to a cylinder, and the part forming the non-printing area 1a and the part having the annular end surface 1b are made of so-called engineering material such as unsaturated polyester. Each side wall 7 is made of the same engineering plastic as described above and is formed separately from or integrally with the portion forming the non-printing area 1a. Although they are located at the left and right ends of the casing l, there are circular central opening ICs on the outer wall (the part having the annular end surface 1b).
A pair of disk-shaped covers 2 are fixed to each central opening 1C with screws 3 to close the central openings 1C.

At the center of the cover 2, a flange portion 2a is formed to protrude outward, and a rotation shaft (support shaft) 4 is provided at the center of the side wall 7 of each of the plurality of housings 1 and at the center of the flange portion 2a.
is inserted horizontally. The rotating shaft 4 and the cover 2 are connected to each other by a key 5 (or a pin, not shown) so that rotational force can be transmitted thereto. Note that 2b is a radial lip provided on the outer surface of the cover 2.

A flange 7a is provided at the center of the side wall 7 of the housing 1, and a through hole 7b through which the rotating shaft 4 is inserted is bored at the center of the flange 7a. Inside the side wall 7, reinforcing lips 7C are radially formed between the peripheral edge and the flange 7a.

The radius of curvature of the non-printing area 1a of the housing l is configured to be larger than the radius of curvature of the printing area 1d. This is because plugs, paper holding pins, etc., which will be described later, are implanted in the non-printing area 1a of the casing 1, but the plugs and the like protrude further in the centrifugal direction than the printing area 1d to prevent them from coming into contact with press rolls, etc. This is to prevent this.

In the non-printing area 1a of each of the casings 1, an injection port 8 for injecting printing ink is provided inside, and a stopper 9 is removably screwed into each injection port 8. .

In the printing area 1d of each housing 1, a punching screen 1 is provided with numerous through holes that allow printing ink to pass through.
0 are fixed with screws or adhesive, respectively.

A silk screen 13 having screen pars 12a and 12b fixed to both ends thereof is wound around the outer periphery of each punching screen IO.

One of the screeners 12b is engaged with a bottle 14 installed in the non-printing area 1a of each housing 1, and the other screener 12a is engaged with an adjustment screw installed in the non-printing area 1a of each housing 1. It is screwed onto the end of 15. Therefore, when the adjusting screw 15 is tightened, each of the silk screens 13 is stuck to the outer periphery of each punching screen 10.

A protruding pin 7d for positioning is integrally formed on the outside of one side wall 7 of the housing 1 to protrude, and a position where the protruding pin 7d can be inserted and engaged is formed on the inside of the other side wall 7 of the housing 1. A clear hole 7e is bored.

A press roller 17 is pressed only against the printing area 1d of the housing 1.

In addition, each housing 1 is formed so that the thickness dimension in the direction parallel to the extending direction of its rotational axis is smaller than the maximum diameter dimension of the housing 1, that is, it is formed into a flat cylindrical shape. l to 1
Even if it is inserted into the rotating shaft 4 of a book, it is possible to fit it within the same size as a plate cylinder for a conventionally known rotary copying machine.

Then, printing inks of different colors are injected into each housing 1 from the respective injection ports 8. For example, red printing ink is printed on the leftmost housing 1, and blue printing is applied to the second housing l from the left. Inject red printing ink into the third housing l from the left and black printing ink into the rightmost housing 1.
As shown in the figure, each housing 1 is inserted into one rotating shaft 4.

At this time, the protruding pins 7 for mutual positioning between the respective casings 1
When d is engaged with the positioning through hole 7e, the respective casings are positioned relative to each other.

When the printing operation is executed in this state and state, as shown in FIG. 4, it is possible to obtain printed matter 18 that is color-coded into the aforementioned colors along the direction orthogonal to the paper feeding direction during printing.

At this time, there is inevitably a non-image forming area 19 of a constant width between each color.
However, this problem can be fully resolved by creating a manuscript with appropriate ingenuity.

Although not shown, pins and clampers for fixing the stencil paper are attached to the non-printing area 1a of the housing l.

In addition, when printing using the plate cylinder for a rotary copying machine according to the present invention, it is convenient to use the manuscript paper (see Utility Application No. 172734 of 1983) according to the application filed by the applicant when preparing the manuscript. .

Furthermore, in the case of the present invention, it is also possible to partially print on printing paper by inserting only the necessary housing l through the rotating shaft 4.

FIG. 5 is a longitudinal sectional view showing a second embodiment of the invention. In this second embodiment, each of the casings l has a similar shape, and differs only in the thickness dimension in the direction parallel to the extending direction of the axis of rotation. That is, the thickness of the casing l at both ends is Ll, the thickness at the center is L2, and L
The configuration is such that the relationship l>L2 holds true.

Note that the configuration may be such that the relationship L2>Ll is established, and the positional relationship may be different, that is, the color, position, or area of the color coding may be changed as appropriate to achieve a desired form. All that is required is to attach and detach the various casings 1.

A screw is formed on the rotating shaft 4, and a nut 1.1 is screwed onto the screw. Therefore, when the nut 11 is tightened, each casing 1 is integrally fixed to the rotating shaft 4.

As described above, if the thickness dimension of each housing 1 in the direction parallel to the extending direction of the rotation axis is different, it is possible to vary the width of the color coding.

Further, in this embodiment, a boss 7e through which the rotating shaft 4 can be inserted is formed integrally with the side wall 7 at the center of the housing 1, and a closed space serving as an ink storage chamber is formed within the housing 1. There is. In this way, if a closed space is formed even if the rotating shaft 4 is not inserted into the housing l, the housing l filled with ink of a color that will not be used can be easily stored.

Furthermore, it is possible to supply the plate cylinder for a rotary copying machine to consumers in a so-called disposable form, in which the plate cylinder for a rotary copying machine is sold with an appropriate printing ink injected therein.

Note that it is also possible to insert a plurality of casings l through one rotating shaft 4 and to wrap a single silk screen 13 around the plurality of casings l.

FIG. 6 is a longitudinal sectional view showing a third embodiment of the present invention. This third embodiment is similar to the second embodiment, but the third embodiment is not equipped with a rotating shaft 4.
A pair of protrusions 20a are formed protrudingly on one (right) end surface of the central axis 20 of each housing 1, and a pair of protrusions 20a are formed protrudingly on the other (left) end surface.
A pair of recesses 20b into which a pair of protrusions 20 can be inserted are bored. Therefore, when a plurality of housings 1 are arranged in parallel so that their end surfaces are in close contact with each other, each of the protrusions 20a and the recesses 20
b are engaged and fixed to each other.・Please note that each housing
Through-holes are drilled at symmetrical positions across the central axis 20, and long bolts 21 (fixing tools) are inserted into these through-holes.
is inserted through it, and a nut 22 is screwed onto the protruding end. Therefore, when the nut 22 is tightened, the housings 1 are firmly fixed to each other.

In this embodiment, the rotation shaft 4 as described above is not provided, but a pair of drive shafts 23 and 24 are provided facing each other.
At mutually opposite ends of these drive shafts 23,24,
A protrusion 23a and a recess 24a that can be engaged with the protrusion 20a and recess 20b of the housing 1 are provided, respectively. Therefore, when a plurality of casings 1 are held between the drive shafts 23, 24 as shown in FIG. 6, the casings 1 are held by these drive shafts 23, 24 and rotational force is applied to them. .

Note that the long bolt 21 may be inserted at a non-center position of the central axis 20 of the housing 1. This eliminates the risk of ink leaking from the through holes.

(g) Effects of the invention In the present invention, a single rotary copying machine can be equipped with a plurality of housings, and if printing ink of different colors is injected into each housing, the inks of two or more colors can be mixed. will not be done,
It is possible to print multiple colors in one printing operation.

Therefore, even if the number of colors increases, the printing cost hardly increases, and inexpensive color printed matter can be obtained.

Furthermore, in the present invention, since each casing can be attached and detached, it is possible to freely change the color and width of the color coding, and its uses are dramatically expanded.

Furthermore, it is also possible to partially print by attaching only the necessary casing to a rotary copying machine.

[Brief explanation of the drawing]

1 to 4 show the first embodiment, FIG. 1 is a perspective view showing a partial cross section, FIG. 2 is a vertical cross-sectional view, and FIG. 3 is a vertical cross-sectional view showing the state in which each housing is separated. 4 is a plan view of the printed matter, and FIG. 5 is a vertical sectional view showing a second embodiment of the present invention.
FIG. 6 is a longitudinal sectional view showing a third embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Housing, 1a... Non-printing area, ld... Printing area, 4... Rotating shaft (support shaft), 7... Side wall, 7a
...Flange, 7b...Through hole, 7d...Protruding bottle, 7e...Through hole, 7"...Boss, 8...Inlet,
9... Plug body, 10... Punching screen, 11
...Nut (tightening means), 13...Silk screen, 18...Printed material, 20...Center shaft, 20a...
・Protrusion, 20b... recess, 21... long bolt (
Fixture), 23.24... Drive shaft. Patent applicant Seiki Kogyo Co., Ltd. Figure 4

Claims (1)

[Scope of Claims] 1. A rotary press, which includes a cylindrical-like casing, which is equipped with a member that allows printing ink to penetrate at least in the printing area of the circumferential surface, and which is removably mounted on a support shaft. A plate cylinder for a rotary mimeograph machine, wherein a thickness dimension of the casing in a direction parallel to the extending direction of the rotation axis is smaller than a maximum diameter dimension of the casing. . 2. The rotary copying machine plate according to claim 1, wherein a boss through which the support shaft is inserted is fixed to the center of the housing, and a closed space serving as an ink storage chamber is formed inside the housing. Torso. 3. The plate cylinder for a rotary copying machine according to claim 1 or 2, wherein an ink injection port for injecting ink into the interior is provided in a non-printing area of the casing. 4. A plate for a rotary copying machine, in which a plurality of cylindrical-like casings are removably attached to a support shaft, each of which is equipped with a member that allows printing ink to penetrate into at least the printing area on the circumferential surface. Torso. 5. A plurality of cylindrical-like casings, each of which is equipped with a member that allows printing ink to penetrate at least in the printing area on the circumferential surface, are arranged side by side so that their end surfaces are in close contact with each other, and all Plate cylinders for rotary copying machines are fixed to each other by rod-shaped fixtures that pass through the housing at non-centered positions. 6. The plate cylinder for a rotary copying machine according to claim 4 or 5, wherein inks of different colors are stored in the plurality of casings, respectively. 7. The plate cylinder for a rotary copying machine according to claim 4, wherein one support shaft is inserted through the plurality of casings, and the support shaft is provided with a tightening means for integrally fastening the casings. 8. A plate cylinder for a rotary copying machine, comprising a cylindrical-like casing, which is equipped with a member that allows printing ink to penetrate at least in the printing area of the circumferential side, and which is removably mounted on a support shaft. , the thickness dimension of the casing in a direction parallel to the extending direction of the rotation axis is smaller than the maximum diameter dimension of the casing, and the plurality of casings are arranged such that their end surfaces are in close contact with each other. A plate cylinder for a rotary mimeograph machine characterized by being arranged side by side. 9. The plate cylinder for a rotary copying machine according to any one of claims 4 to 8, wherein there are at least two types of thickness dimensions of the housing in a direction parallel to the extending direction of the rotation axis. 10. A plurality of cylindrical-like casings each having a member that allows penetration of printing ink in at least the printing area of the circumferential side are installed in parallel so that their end surfaces are in close contact with each other; 10. The plate cylinder for a rotary copying machine according to claim 4, wherein a single screen is attached to the casing.