JP3806463B2 - Thin-walled cylinder type rotary rolling press, ink operating method and printing operation method of the printing machine - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a thin plate cylinder type rotary stencil printing press, an ink familiar operation method and a printing operation method of the printing press.
[0002]
[Prior art]
In general, as shown in FIG. 5, a thin plate cylinder type rotary stencil printing machine performs printing by passing a printing paper 98 through a thin plate cylinder 90 mounted with a printing base paper 96 and rotating. It is configured. Specifically, the thin plate cylinder 90 includes a thin metal cylinder and a screen outside thereof. The plate cylinder 90 has an ink transmission region 91 made up of countless through holes, and an ink roller 92 is provided inside the plate cylinder 90. A printing base paper 96 is mounted on the outer peripheral surface of the plate cylinder 90 so as to cover the ink transmission region 91. Thereafter, when printing is performed on the printing paper 98, the press roller 94 presses the printing paper 98 against the printing base paper 96 of the plate cylinder 90. At this time, since the plate cylinder 90 has a thin-walled structure, when it is pressed by the press roller 94, it is deformed very slightly, for example, about 0.2 mm, and the inner peripheral surface 93 of the deformed plate cylinder 90 rotates at a fixed position. Ink is supplied to the inner peripheral surface 93 of the plate cylinder 90 in contact with the outer peripheral surface of the ink roller 92. The supplied ink passes through the ink transmission area 91 of the plate cylinder 90 and is pushed out onto the printing paper 98 from the hole formed in the printing base paper 96, and printing is performed. The press roller 94 is separated from the plate cylinder 90 immediately before the end of printing, that is, immediately before the end portion of the printing paper 98 passes, and the plate cylinder 90 deformed inward returns to its original shape. A gap is formed between the inner peripheral surface 93 and the ink roller 92 so as to be in a non-contact state, the ink supply is stopped, and the ink does not overflow from the rear end portion 96a of the base paper.
[0003]
By the way, if such a thin plate cylinder type rotary stencil printing press is not used for a long time, the ink on the inner peripheral surface 93 of the plate cylinder 90 dries and decreases. The cause of this ink drying is related to temperature conditions, humidity conditions, and other factors in addition to long-term non-use. Therefore, when printing is performed again, until sufficient ink is supplied from the ink roller 92 to the inner peripheral surface 93 of the plate cylinder 93, the print density becomes low due to insufficient ink, and clear printing cannot be obtained. The first few prints may be wasted.
[0004]
[Problems to be solved by the invention]
Therefore, the technical problem to be solved by the present invention is clear from the first sheet even when the ink on the plate cylinder is dried due to the non-use state for a long time. It is an object to provide a thin plate cylinder type rotary rolling press capable of printing, an ink familiar operation method and a printing operation method of the printing press.
[0005]
[Means for solving the problems and actions / effects]
In order to solve the above technical problem, a thin plate cylinder type rotary stencil printing press according to the present invention is configured as follows.
[0006]
  A thin plate cylinder type rotary stencil printing machine includes a thin plate cylinder on which a stencil sheet made on the outer peripheral surface can be mounted, an ink supply means including an ink roller for supplying ink to the inner peripheral surface of the plate cylinder, and the plate cylinder The plate cylinder and a press roller provided so as to be able to contact with and separate from the ink roller are provided so as to face the ink roller. The ink roller has a position away from the inner peripheral surface of the plate cylinder as a normal position, and when not printing, that is, before printing and after printing, the press roller, the plate cylinder, and the ink roller are separated from each other, During printing, the press roller is pressed against the plate cylinder, whereby the plate cylinder is elastically deformed and contacts the ink roller. The thin plate cylinder type rotary stencil printing press includes an ink roller moving means and a control means. The ink roller moving means moves the ink roller from a normal position away from the inner peripheral surface of the plate cylinder to a contact position in contact with the inner peripheral surface of the plate cylinder during non-printing. The control means determines whether or not the ink familiar operation is necessary based on the ink state of the plate cylinder, for example, the ink distribution amount, the dry state, the viscosity, and the temperature, and the ink familiar operation is necessary. When judged, remove the stencil sheet mounted on the plate cylinder and install a new stencil sheet before printing.AfterThe ink roller moving means is operated so that the ink roller moves to the contact position, and the plate cylinder is rotated for a predetermined time to replenish ink over the entire inner peripheral surface of the plate cylinder and the newly made stencil sheet. Ink familiar operation is performed, and after completion of the ink familiar operation, the ink roller moving means is operated so that the ink roller returns to the normal position, and printing starts after the ink roller returns to the normal position.On the other hand, if it is determined that the ink-familiar operation is not necessary, remove the stencil paper attached to the plate cylinder before printing and install the newly-made stencil paper before performing the ink-familiar operation. Control means for starting printing.
[0007]
In the above configuration, the control unit determines whether or not the ink familiar operation is necessary before printing. In other words, if it is expected that a clear print will not be obtained from the beginning if printing is performed immediately, such as when the ink on the plate cylinder is dry or the temperature is low, it is determined that an ink familiar operation is necessary. To do.
[0008]
When it is determined that the ink familiar operation is necessary, the control unit first operates the ink roller moving unit and rotates the plate cylinder to perform the ink familiar operation prior to printing. That is, the ink roller that has been separated from the inner peripheral surface of the plate cylinder is moved to contact the inner peripheral surface of the plate cylinder, and the plate cylinder is replenished with ink. At this time, either the operation start of the ink roller moving unit and the rotation start of the plate cylinder may be performed first, or may be started simultaneously.
[0009]
Next, after completion of the ink familiar operation for a predetermined time, the operation of the ink roller moving means is stopped, and the ink roller is separated from the inner peripheral surface of the plate cylinder. At this time, the rotation of the plate cylinder may be stopped, or the rotation may be continued as it is in preparation for the next printing.
[0010]
The control means performs printing in accordance with a well-known method immediately after the ink familiar operation is performed as described above when it is determined that the ink familiar operation is necessary, and immediately after it is determined that the ink familiar operation is unnecessary. Make it. That is, in synchronism with the passage of the printing paper between the plate cylinder and the press roller, the press roller is pressed against the printing paper, the plate cylinder and the ink roller, and the ink from the plate cylinder is passed through the printing document onto the printing paper. Printing is performed by extruding.
[0011]
In the above configuration, when the ink is dry and the ink in the plate cylinder is insufficient, the ink familiar operation can be performed to replenish the ink. Therefore, even when the ink on the plate cylinder is dried due to the non-use state for a long time, clear printing can be performed from the first sheet.
[0012]
Preferably, the press roller is disposed on the lower side and the ink roller is disposed on the upper side across the plate cylinder. The ink roller moving means includes an ink roller support member, a stopper member, an urging member, and an urging release means. The ink roller support member pivotally supports the ink roller and is movably supported so that the ink roller can move toward and away from the inner peripheral surface of the plate cylinder. In a natural state, the ink roller descends. In contact with the inner peripheral surface of the plate cylinder. The stopper member is provided so as to abut against the ink roller support member to prevent the movement of the ink roller support member, and is dimensioned so that the ink roller is in the normal position when the ink roller support member abuts. Has been. The urging member normally urges the ink roller support member to bring the ink roller support member into contact with the stopper member. The urging release means releases the urging force that the urging member urges the ink roller support member to the stopper member.
[0013]
In the above configuration, the control means operates the urging release means of the ink roller moving means to release the urging force of the urging member during the ink familiar operation. As a result, the ink roller support member held at the normal position moves by its own weight, and the ink roller comes into contact with the inner peripheral surface of the plate cylinder, so that the ink familiar operation can be performed. On the other hand, when the operation of the bias release means is stopped, the bias member biases the ink roller support member to the normal position. Since the ink roller support member contacts the stopper member, the ink roller is held in the normal position even when the ink roller is urged by the press roller and the plate cylinder during printing. Therefore, the ink familiar operation can be performed with a simple configuration.
[0014]
The present invention also provides an ink familiar operation method for a thin plate cylinder type rotary rolling press.
[0015]
  The ink familiar operation method in the thin plate cylinder type rotary printing press is from the first step to the first step.3Comprising steps. The thin plate cylinder type rotary stencil printing machine has a thin plate cylinder on which the stencil sheet made on the outer peripheral surface can be mounted, and the ink roller has a position away from the inner peripheral surface of the plate cylinder as a normal position. Ink supply means including an ink roller for supplying ink to the inner peripheral surface of the plate, and a press roller provided so as to be able to contact with and separate from the plate cylinder and the ink roller facing the ink roller with the plate cylinder interposed therebetween The press roller, the plate cylinder, and the ink roller are separated from each other at the time of non-printing, and the press roller presses against the plate cylinder at the time of printing, whereby the plate cylinder is elastically deformed to elastically deform the ink roller. To touch. In the first step, it is determined whether or not the ink familiar operation is necessary.AndIn the second step, the stencil sheet mounted on the plate cylinder is removed and a newly stencil sheet is mounted. In the third step,When it is determined that ink familiar operation is required,The press roller is in contact with the inner peripheral surface of the plate cylinder from a normal position away from the inner peripheral surface of the plate cylinder while the press roller is not pressed against the plate cylinder and the ink roller. The ink cylinder is rotated to the position and the plate cylinder is rotated to perform an ink familiar operation for supplying ink to the entire inner peripheral surface of the plate cylinder and the newly made stencil sheet.After the ink familiar operation, the ink roller ( 40 ) Is started after returning to the normal position, and when it is determined that the ink familiar operation is not necessary, printing is started without performing the ink familiar operation..
[0016]
In the above configuration, when the ink is dry and the ink in the plate cylinder is insufficient, that is, when the ink familiar operation is necessary, in the first step, the ink roller is moved to replenish the plate cylinder with ink. To do. Next, in the second step, the ink roller is returned to the normal position to be ready for printing. If the ink familiar operation is performed in this way, the ink shortage of the plate cylinder is eliminated, so that the printing density does not become thin when the next printing is performed. Therefore, even when the ink on the plate cylinder is dried due to the non-use state for a long time, clear printing can be performed from the first sheet.
[0017]
In the above configuration, the necessity of the ink familiar operation needs to be determined based on the ink state of the plate cylinder, for example, the ink distribution amount, the dry state, the viscosity, and the temperature. It is difficult to detect automatically. For this reason, the state of the ink on the plate cylinder is estimated based on various factors to determine whether or not the ink familiar operation is necessary.
[0018]
Preferably, the first step includes the elapsed time from the end of the previous printing, the ink temperature, the ink ambient temperature inside the plate cylinder, the previous number of prints, whether or not the ink familiar operation was performed before the previous printing, It is determined whether or not the ink familiar operation is necessary based on at least one factor among the total number of printed sheets in the previous plate making.
[0019]
In the above configuration, the elapsed time from the end of the previous printing can be a factor of determination because the ink in the plate cylinder dries as the non-printing state continues longer. Since the ink temperature affects the drying speed and the fluidity of the ink during printing, it is a factor in the determination. The ink ambient temperature inside the plate cylinder is a factor that can be used instead of directly measuring the ink temperature. The previous number of printed sheets, whether or not the ink familiar operation was performed before the previous printing, and the total number of printed sheets in the previous and previous previous plate making affect the amount of ink contained in the plate cylinder. It becomes a factor. Therefore, it is possible to determine whether or not the ink familiar operation is necessary based on the factors related to the ink state of the plate cylinder.
[0020]
In the above configuration, it is also possible to perform an ink familiar operation under a certain operation condition regardless of the state of ink in the plate cylinder.
[0021]
  Preferably, the abovePerform ink familiar operationFirst3The steps are the elapsed time from the end of the previous printing, the ink temperature, the ink ambient temperature inside the plate cylinder, the previous number of prints, whether or not the ink familiar operation was performed before the previous printing, and the previous and previous plate making. Based on at least one factor in the total number of printed sheets, the operating condition of the ink familiar operation is changed.
[0022]
In the above configuration, according to the state of ink in the plate cylinder, the operating condition of the ink familiar operation is changed, the replenishment amount of ink is finely adjusted, the state of ink in the plate cylinder at the start of printing is made more uniform, and printing is performed. The variation in printing density immediately after the start can be reduced.
[0023]
Furthermore, the present invention provides an ink-familiar operation method for a thin plate cylinder type rotary rolling press.
[0024]
That is, after the ink familiar operation method described above is performed, printing is performed with at least the first sheet having a press contact force that the press roller presses against the plate cylinder and the ink roller larger than usual.
[0025]
In the above configuration, although an appropriate amount of ink is supplied to the inner peripheral surface side of the plate cylinder by the ink familiar operation, the ink is insufficient on the outer peripheral surface side of the plate cylinder due to drying of the ink, etc. Since the amount of ink extrusion is insufficient with the pressure contact force, even when the printing density of the first sheet becomes thin, the ink extrusion amount can be reduced by pressing the press roller against the plate cylinder with a pressure force larger than usual. In addition, insufficient printing density can be prevented. Normally, the ink shortage on the outer peripheral surface side of the plate cylinder is resolved after the first first sheet is printed, so that the normal pressure contact force is used for the second and subsequent sheets. If this is not the case, the press-contact force of the press roller after that can be set larger than usual, but at this time, the second sheet is more than the first sheet and the third sheet is more than the second sheet. The pressure contact force is gradually reduced so that it approaches the normal pressure contact force.
[0026]
【Example】
The thin plate cylinder type rotary stencil printing press according to one embodiment of the present invention shown in FIGS. 1 to 4 will be described in detail below. FIG. 1 is an overall configuration diagram of a thin plate cylinder type rotary stencil printing press according to an embodiment of the present invention. 2 to 4 are enlarged cross-sectional views of the main part of the printing drum of FIG. FIG. 2 shows a non-printing state in which the ink roller and the inner peripheral surface of the plate cylinder are separated from each other, and FIG. 3 shows that the ink roller is brought into contact with the inner peripheral surface of the plate cylinder before printing and the ink is accustomed. FIG. 4 shows a state during printing in which the press roller is pressed against the plate cylinder (printing paper is not shown).
[0027]
First, an outline of a configuration of a thin plate cylinder type printing press 1 according to an embodiment of the present invention will be described with reference to FIG.
[0028]
The printing machine 1 includes an apparatus main body 2 in which a transport mechanism 60 and a printing mechanism 70 are arranged, and a paper feeding unit 4 and a paper discharging unit 6 arranged on both sides thereof. The printing paper 8 is stacked on the paper feeding unit 4 and is transported one by one from the top to the inside of the apparatus main body 2 by the paper feeding ring 62 of the transport mechanism 60. The printing paper 8 is printed by a printing mechanism 70 provided in the middle of the conveyance path 64, and then is discharged to the paper discharge unit 6 and stacked in order.
[0029]
The printing mechanism 70 includes the plate cylinder 10 on the upper side of the conveyance path 64 of the printing paper 8 and the press roller 50 on the lower side.
[0030]
Although not shown, the plate cylinder 10 includes a substantially cylindrical thin metal cylinder, that is, a plate cylinder main body, and a screen that covers the outer peripheral surface of the plate cylinder main body. At a predetermined position of the plate cylinder main body, there is an ink passage portion, that is, an opening portion in which innumerable through holes (through holes) are formed in a dot pattern. A stencil sheet (not shown) is attached to the outer peripheral surface of the screen of the plate cylinder so as to cover the opening.
[0031]
The printing mechanism 70 includes an ink roller 40 and other ink supply means inside the plate cylinder 10. As shown in FIG. 2, the ink roller 40 is usually disposed with a predetermined gap, for example, 0.2 mm, between the inner peripheral surface 13 of the plate cylinder 10 in a natural state, and the ink familiar operation before printing is performed. In some cases, as shown in FIG. 3, the plate cylinder 10 is supported so as to be movable so as to be in contact with the inner peripheral surface.
[0032]
Specifically, as shown in FIGS. 2 to 4, a fixed plate 20 and a movable plate 26 are provided in the approximate center position in the width direction of the plate cylinder 10. The movable plate 26 is rotatably supported by the shaft support portion 22 of the fixed plate 20 below the fixed plate 20, and supports the ink roller 40 and the doctor roller 42.
[0033]
Above the movable plate 26, a motor 32 and a microswitch 38 supported by a support member (not shown) are arranged. A rotating cam 34 is fixed to the output shaft of the motor 32, and a contact arm 39 of the micro switch 38 is in contact with the first and second cam surfaces 34 a and 34 b of the rotating cam 34. One end portion 36a of the spring locking plate 36 is pivotally supported at the eccentric position on the side surface of the rotating cam 34 opposite to the motor 32. A through hole 36 b is provided at the other end of the spring locking plate 36.
[0034]
One end of the coil spring 30 is inserted and locked into the through hole 36b. The other end of the coil spring 28 is locked to a spring locking projection 28 protruding from the movable plate 26. As shown in FIGS. 2 and 4, the coil spring 30 is extended when the motor 32 rotates and the spring locking plate 36 is in the upper position, and the movable plate 26 is pulled up to project the protrusion 24 of the fixed plate 20. The movable plate 26 and the ink roller 40 are held at the upper position. When the movable plate 26 is in the upper position, the ink roller 40 moves away from the inner peripheral surface 13 of the plate cylinder 10 as shown in FIG. 2 when not printing, and press roller 50 when printing as shown in FIG. Is in contact with the inner peripheral surface 13 of the plate cylinder 10 which is pressed and elastically deformed.
[0035]
On the other hand, as shown in FIG. 3, when the motor 32 rotates and the spring locking plate 36 is in the lower position, the movable plate 26 and the ink roller 40 are also in the lower position. That is, the coil spring 30 has a natural length, and there is no urging force that pulls up the movable plate 26. Therefore, the movable plate 26 rotates by its own weight about the shaft support portion 22, and the ink roller 40 supported by the movable plate 26 descends and contacts the inner peripheral surface 13 of the plate cylinder 10.
[0036]
The rotary cam 34 has a first cam surface 34 a that is retracted radially inward and a second cam surface 34 b that protrudes radially outward. The microswitch 38 has a contact arm 39 whose tip is connected to the rotary cam 34. It is possible to detect which one of the first and second cam surfaces 34a and 34b is in contact with. The motor 32 is controlled so as to always rotate in the clockwise direction indicated by the arrow 84. When the spring locking plate 36 moves up, the tip of the contact arm 39 of the microswitch 38 comes into contact with the first cam surface 34a of the rotating cam 34. When the spring locking plate 36 is lowered, the tip of the contact arm 39 of the microswitch 38 comes into contact with the second cam surface 34a of the rotating cam 34.
[0037]
In addition to the ink roller 40 and the doctor roller 42, the printing mechanism 70 includes an ink supply unit 44 provided substantially above the ink roller 40 as shown in FIG. The ink 46 is dropped from the ink supply unit 44, and an appropriate amount of ink 46 is applied to the outer peripheral surface of the ink roller 40 by the doctor roller 42. The supply of the ink 46 is controlled by detecting the amount of ink accumulated in the wedge-shaped portion between the ink roller 40 and the doctor roller 42. In addition, a temperature sensor (not shown) is provided at or around the wedge-shaped portion.
[0038]
The press roller 50 is disposed substantially directly below the plate cylinder 10 and faces the ink roller 40 with the plate cylinder 10 interposed therebetween. As shown in FIG. 1, the press roller 50 is supported so as to be movable up and down around a fulcrum 52. It can be moved between two positions. The drive mechanism can adjust the pressing force when the press roller 50 is pressed against the plate cylinder 10.
[0039]
The printing machine 1 also includes a control device 100 such as a sequencer or a microcomputer. The control device 100 receives a signal from the micro switch 38, a signal from a temperature sensor (not shown), and the like, and sends a control signal to the motor 32, the transport mechanism 60, and the like according to a preprogrammed procedure. In addition, the control device 100 can be connected to an external personal computer (not shown), and can control the operation of the printing press 1 from the personal computer. For example, image information created by a personal computer can be sent to the printing machine 1 to directly make a stencil sheet, and a predetermined number of prints can be executed.
[0040]
Next, the operation of the thin plate cylinder type rotary stencil printing press 1 will be described.
[0041]
When the printing machine 1 is not printing, as shown in FIG. 2, the press roller 50 is separated from the plate cylinder 10, the movable plate 26 is in the upper position, and the space between the ink roller 40 and the inner peripheral surface 13 of the plate cylinder 10. A gap is formed, and the ink 46 is not supplied from the ink roller 40 to the plate cylinder 10. At this time, as shown in FIG. 2, the motor 32 is stopped at the first position where the spring locking plate 36 is raised most and the coil spring 30 is extended most.
[0042]
When a plate making button (not shown) of the printing press 1 is pressed, the stencil sheet is removed from the plate cylinder 10 under the control of the control device 100, a new stencil sheet is made and attached to the plate cylinder 10, and if necessary. Then, the ink familiar operation is performed, and a preset number of sheets are printed. When the number of prints is not set in advance, only one sheet is printed. When a print button (not shown) is pressed, further printing can be performed using the stencil sheet already mounted on the plate cylinder 10.
[0043]
Before starting printing, the control device 100 determines whether or not an ink-familiar operation is necessary based on various factors such as past operation history and the current ink temperature of the printing press 1. As an example, when at least one of the following conditions is satisfied, the control device 100 commands the execution of the ink familiar operation. That is,
(1) When not used for more than 8 hours.
(2) The ink is not used for 1 hour or more and the ink temperature is 10 ° C or less.
(3) When the number of printed sheets in the previous plate making is 5 or less.
(4) When the number of printed sheets in the previous plate making is 10 or less and the ink familiar operation was not performed during the previous plate making.
(5) The total number of printed sheets in the previous and previous previous platemaking is 20 or less.
Here, the non-use time is the simplest if it is the time from when the printing press 1 is turned off to when it is turned on again. When the previous printing is completed by the built-in timer of the control device 100, for example, the last press roller. This is the time from when the plate is lowered until the prepress button is pressed.
[0044]
The above (1) is a case where it is predicted that the ink is dried over a long time. The above (2) considers the viscosity of the ink. The above (3) to (5) are cases where the ink familiarity with the plate cylinder is expected to be small. The determination may be made by using the environmental temperature inside the plate cylinder 10 instead of the ink temperature.
[0045]
When determining that the ink familiar operation is necessary, the control device 100 idles the plate cylinder 10, rotates the motor 32 to loosen the coil spring 30, and lowers the movable plate 26 and the ink roller 40. Specifically, the control device 100 detects the change of the output signal of the micro switch 38, that is, the contact arm 39 of the micro switch 38 that has been in contact with the second cam surface 34 b of the rotary cam 34 is the first of the rotary cam 34. The motor 32 is rotated in the clockwise direction indicated by the arrow 84 until the one cam surface 34a abuts, and the spring locking plate 36 is lowered. When the motor 34 is stopped, the spring locking plate 36 is in the lower position as shown in FIG. As a result, the movable plate 26 is rotated by its own weight, and the ink roller 40 contacts the inner peripheral surface 13 of the plate cylinder 10. The ink roller 40 rotates in contact with the rotating plate cylinder 10 and supplies the ink 46 to the plate cylinder 10.
[0046]
In such an ink familiar operation, the rotational speed at which the plate cylinder 10 rotates in contact with the ink roller 40 is determined so as to supply an amount of ink corresponding to the ink shortage state. As an example, when the non-use time is less than one day, the plate cylinder 10 is rotated 10 times in contact with the ink roller 40, and when the non-use time is 1 day to 1 week, it is rotated 15 times, and 1 week to 1 month. When it is, turn 20 times, and when it is more than one month, turn 30 times. Further, every time the ink temperature falls by 1 ° C. from 10 ° C., the number of rotations is further added by two rotations. As a result, it is possible to cope with a case where the ink supply amount during the ink familiar operation decreases because the ink temperature is low.
[0047]
After the ink familiar operation is completed, the control device 100 returns the ink roller 40 to the upper position. Specifically, until the control device detects a change in the output signal of the micro switch 38, that is, the contact arm 39 of the micro switch 38 that has been in contact with the first cam surface 34 a of the rotating cam 34 is the second of the rotating cam 34. The motor 32 is rotated in the clockwise direction indicated by the arrow 84 until it abuts on the cam surface 34b, and the spring locking plate 36 is raised. As a result, the movable plate 26 is held at the upper position, returns to the initial state shown in FIG. 2, and becomes ready for printing.
[0048]
Next, similarly to the conventional apparatus, the control apparatus 100 causes the plate cylinder 10, the ink roller 40, and the press roller 50 to rotate in synchronization to perform printing. Specifically, the control device 100 operates the transport mechanism 60 to send the printing paper 8 into the transport path 64 at a constant cycle. In synchronization with the printing paper 8 reaching between the plate cylinder 10 and the press roller 50, the press roller 50 is raised about the fulcrum 52, and the printing paper 8 is pressed against the printing base paper mounted on the plate cylinder 10. . At this time, as shown in FIG. 4, the plate cylinder 10 is pressed from the press roller 50 to bend inward locally, and the inner peripheral surface 13 of the plate cylinder 10 contacts the outer peripheral surface of the ink roller 40. As a result, ink is supplied from the ink roller 40 to the plate cylinder 10, and the ink 46 of the plate cylinder 10 is printed through the hole formed in the stencil sheet through the screen from the opening portion of the plate cylinder body. It is pushed out onto the paper 8. That is, it is printed. The printing paper 8 is sent out from the starting end side to the terminal end side with the rotation of the plate cylinder 10 in such a state where the printing paper 8 is pressed. Then, immediately before the rear end of the printing paper 8 passes between the plate cylinder 10 and the press roller 50, that is, immediately before the end of printing, the press roller 50 is lowered around the fulcrum 52 and is retracted from the plate cylinder 10. . At this time, the printing paper 8 is not pressed against the plate cylinder 10, the plate cylinder 10 is not pushed by the press roller 50, and the plate cylinder 10 that has been deformed inward returns to its original shape and leaves the ink roller 40. The ink supply is stopped.
[0049]
As described above, the control device 100 raises the press roller 50 only when the printing paper 8 is between the printing cylinder 10 and sandwiches the printing paper 8 between the printing cylinder 10 to perform printing. However, in this printing press 1, the set value of the press contact force when the press roller 50 presses against the plate cylinder 10 can be changed from the operation button or the connected personal computer, and the print density can be adjusted. .
[0050]
Further, in this printing machine 1, when the ink familiar operation is performed before printing, the control device 100 sets a pressure contact force with which the press roller 50 presses against the plate cylinder 10 only at the time of printing the first first sheet. 20-100% larger than the value. Thus, even when the ink outside the plate cylinder 10 is dry, clear printing can be obtained from the first sheet.
[0051]
As described above, the rotary stencil printing press 1 is the first sheet even when the ink on the inner peripheral surface 13 of the plate cylinder 10 is dry due to a non-use state for a long time. Clear print from the eyes.
[0052]
In addition, this invention is not limited to the said Example, It can implement in another various aspect. For example, the mechanism for moving the ink roller during the ink familiar operation can have various configurations other than the present embodiment. In this embodiment, the ink familiar operation is performed as necessary only when plate making is performed, that is, only before printing is started with a new stencil sheet. In the case of interruption, it is also possible to perform an ink familiar operation as necessary when printing is resumed.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of a rotary printing press according to an embodiment of the present invention.
FIG. 2 is an enlarged view of a main part of the printing machine shown in FIG. A state when the ink roller is in the upper position during non-printing is shown.
FIG. 3 is an enlarged view of a main part similar to FIG. The state when the ink roller is in the lower position during non-printing is shown.
4 is an enlarged view of a main part similar to FIG. Indicates the state during printing.
FIG. 5 is a configuration diagram of a main part of a conventional rotary stencil printing press.
[Explanation of symbols]
1 Thin plate cylinder type rotary stencil printing machine
2 Main unit
4 Paper feeder
6 Output section
8 Printing paper
10 Plate cylinder
13 Inner peripheral surface
20 Fixed plate
22 Shaft support
24 Protrusion (ink roller moving means, stopper member)
26 Movable plate (ink roller moving means, ink roller support member)
28 Spring locking projection
30 Coil spring (ink roller moving means, biasing member)
32 Motor (ink roller moving means, bias releasing means)
34 Rotating cam (ink roller moving means, bias releasing means)
34a, 34b Cam surface
36 Spring locking plate (ink roller moving means, bias releasing means)
36a end
36b Through hole
38 Micro switch
39 Contact arm
40 Ink roller (ink supply means)
42 Doctor roller (ink supply means)
44 Ink supply unit (ink supply means)
46 ink
50 Press roller
52 fulcrum
60 Transport mechanism
62 Feeding ring
64 Transport route
70 Printing mechanism
100 Control device (control means)

Claims (6)

Ink supply means comprising a thin plate cylinder (10) on which an stencil sheet made on the outer peripheral surface can be mounted, and an ink roller (40) for supplying ink (46) to the inner peripheral surface (13) of the plate cylinder (10) (40, 42, 44) and the plate cylinder (10) and the ink roller (40) opposite to the plate cylinder (10) and the ink roller (40). A press roller (50), and the ink roller is located at a position away from the inner peripheral surface of the plate cylinder at a normal position, and during printing, the paper is placed between the plate cylinder (10) and the press roller (50). In the thin plate cylinder type rotary rolling press (1) in which the plate cylinder (10) is elastically deformed and is in contact with the ink roller (40).
Ink roller moving means (24, 26, 30, 32, 34, 36) for moving the ink roller (40) from the normal position to a contact position in contact with the inner peripheral surface of the plate cylinder;
Based on the ink state of the plate cylinder (10), it is determined whether or not an ink-familiar operation is necessary. If it is determined that an ink-familiar operation is necessary, the stencil plate mounted on the plate cylinder before printing. After removing the base paper and mounting the newly made stencil base paper, the ink roller moving means is operated so as to move the ink roller to the contact position, and the plate cylinder is rotated for a predetermined time so as to move the inner circumference of the plate cylinder. An ink-familiar operation is performed to replenish ink over the entire surface and the newly-made stencil sheet, and after completion of the ink-familiar operation, the ink roller moving means is operated so that the ink roller returns to the normal position while start printing after the ink roller has returned to the normal position, when it is determined that the ink familiar operation is not required, before printing, mounted on the plate cylinder Remove the plate base paper, after mounting the stencil sheet which has been newly plate making, thin plate cylinder type rotary stencil printer according to a controlling means for starting the printing without performing the ink familiar operation. The press roller (50) is disposed on the lower side of the plate cylinder (10), and the ink roller (40) is disposed on the upper side.
The ink roller moving means (24, 26, 30, 32, 34, 36)
The ink roller (40) is pivotally supported, and the ink roller (40) is supported so as to be movable toward and away from the inner peripheral surface (13) of the plate cylinder (10). An ink roller support member (26) in which the ink roller (40) descends and contacts the inner peripheral surface (13) of the plate cylinder (10);
The ink roller support member (26) is in contact with the ink roller support member (26) to prevent the ink roller support member (26) from moving. When the ink roller support member (26) is in contact with the ink roller (40), A stopper member (24) dimensioned to be in a normal position;
A biasing member (30) that normally biases the ink roller support member (26) to bring the ink roller support member (26) into contact with the stopper member (24);
The urging member (28) includes urging release means (32, 34, 36) for releasing an urging force for urging the ink roller support member (26) to the stopper member (24). The thin plate cylinder type rotary stencil printing press according to claim 1. Ink supply means comprising a thin plate cylinder (10) on which an stencil sheet made on the outer peripheral surface can be mounted, and an ink roller (40) for supplying ink (46) to the inner peripheral surface (13) of the plate cylinder (10) (40, 42, 44) and the plate cylinder (10) and the ink roller (40) opposite to the plate cylinder (10) and the ink roller (40). Press roller (50),
The ink roller has a position away from the inner peripheral surface of the plate cylinder as a normal position, and at the time of printing, a sheet is fed between the plate cylinder (10) and the press roller (50) to press the press roller (50). The plate cylinder (10) is elastically deformed by this and the ink cylinder (10) is in contact with the ink roller (40).
A first step of determining whether or not an ink familiar operation is necessary;
A second step of mounting the new plate making has been stencil sheet removed the stencil sheet attached to the upper Symbol plate cylinder,
When the ink familiar operation is determined to be necessary, while the upper Symbol press roller (50) is in the non-pressed state with respect to the plate cylinder (10) and the ink roller (40), the ink roller (40) An ink familiar operation is performed in which the plate cylinder (10) is rotated from the normal position to the contact position and the entire inner peripheral surface of the plate cylinder (10) and the newly stencil stencil sheet are supplied with ink. no rows, after the upper Symbol ink familiar operation, while the ink roller (40) starts printing after returning to the normal position, when the ink familiar operation is determined not to be necessary, without performing the ink familiar operation And a third step of starting printing . An ink familiar operation method for a thin plate cylinder type rotary rolling press.   The first step includes the elapsed time from the end of the previous printing, the ink temperature, the ink ambient temperature inside the plate cylinder, the previous number of prints, whether or not the ink familiar operation was performed before the previous printing, 4. The ink familiarity of the thin plate cylinder type rotary printing press according to claim 3, wherein it is determined whether or not an ink familiarity operation is necessary based on at least one factor among the total number of printed sheets in plate making. how to drive. The third step of performing the ink familiar operation is the elapsed time from the end of the previous printing, the ink temperature, the ink ambient temperature inside the plate cylinder, the previous number of prints, whether the ink familiar operation was performed before the previous printing, 4. The thin plate cylinder type rotary rolling press according to claim 3, wherein the operating condition of the ink familiar operation is changed based on at least one factor among the total number of printed sheets in the previous and previous previous plate making. Ink familiar driving method.   After performing the ink familiar operation method according to claim 3, 4 or 5, at least the first sheet is subjected to a pressure contact force with which the press roller (50) presses against the plate cylinder (10) and the ink roller (40). A printing operation method for a thin-walled rotary stencil printing machine, wherein printing is performed with a size larger than usual.

Images