JP2001341401A - Stencil printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable a contribution to a reduction of a printing cost by decreasing a residue of a master to be discarded as small as possible and suppressing an uneconomical matter. SOLUTION: When an end of the master is sensed by a master set sensor 72 during platemaking, a control means (not shown) calculates an amount of master capable of being sent after a sensing time point, and judges whether a sending amount of the master for one plate part can be obtained or not. If it is judged that the amount of the masters 64 for the one plate part cannot be obtained, the master 64 is wound on an outer peripheral surface of a plate cylinder 6 similarly to a normal plate supplying step, and the master 64 on the cylinder 6 is delivered by a delivering means (not shown) without conducting a plate attaching operation. A 'master absent' is displayed on a liquid crystal display unit of a control panel (not shown). The end of the master 64 is attached to a core material 65 by an adhesive force weaker than a conveying force.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stencil printing machine for performing printing by winding a master (stencil) around the outer peripheral surface of a plate cylinder.

[0002]

2. Description of the Related Art In a stencil printing apparatus, a master perforated by a heating means such as a thermal head is wound around a perforated plate cylinder, and printing paper sent from a paper feeding means is used as a pressing member. Printing is performed by pressing the plate cylinder outer peripheral surface with a press roller. The ink supplied to the inside of the plate cylinder oozes through the opening of the plate cylinder and the perforation of the master by the pressing force of the press roller, and is transferred to the printing paper to form an ink image. .

[0003] The master making of a master is performed by a plate making unit that is detachable from the main body of the apparatus. When the master runs out, the master making unit is removed from the main body of the apparatus, and after replacing the master, the master making unit is mounted on the main body of the apparatus. It has become. When printing of a predetermined number of sheets on one plate is completed,
The used master is peeled from the plate cylinder by the plate discharging means.

As shown in FIG. 7, the plate making unit includes a roll-shaped master 100, a master set roller 102 and a set plate 104 for setting the leading end of the new master 100 so as to be able to be extended when the new master 100 is replaced.
A thermal head 106 having a heating element for selectively generating heat based on an image signal;
Roller 10 which presses and conveys the master 100
8, a conveying roller pair 110, and a cutter 1 for cutting the master 100 at a predetermined length position (length position for one plate)
12, a pair of transport rollers 114, and a master 10 made
A flexible box 116 and the like for temporarily storing 0 in a plate feeding standby state are provided. The flexible box 116 is provided with a guide plate 116a that is selectively set at a position for conveying the master 100 (a position indicated by a two-dot chain line) and a position for accommodating the master 100 (a position indicated by a solid line). Also, the master 100
Master presence / absence sensor 118 for detecting the presence / absence of master and master set sensor 1 as master set detection means for detecting whether master 100 is at the set position
20 and a master tip detection sensor 122 that detects the tip of the master 100.

When a new master 100 is set on the plate making unit and the plate making unit is mounted on the main body of the apparatus, the mounting switch is turned on, and the leading end of the master 100 is moved to the master set roller 102, platen roller 108, transport roller pair 11
0, and after the leading edge of the master 100 is detected by the master leading edge detection sensor 122, the master 100 is conveyed for a predetermined distance and the operation stops. This operation is called master auto loading, and is automatically performed when the plate making unit is mounted on the apparatus main body. In this master auto-loading, the thermal head 106 is not driven, and the master 100 is sent without plate making. When the master 100 is replaced and the plate making unit is mounted on the apparatus body, the master set sensor 1
If 20 is not turned on, it is determined that the master is set incorrectly. If the master leading edge detection sensor 122 does not turn on when a predetermined time has elapsed after the plate making unit is mounted on the main body of the apparatus, it is determined that the master misload has occurred in master auto loading.

[0006] The master 100 on which the plate has been made is housed in a flexible box 116 and cut by a cutter 112 at a position corresponding to the length of one plate. The master 100 accommodated in the flexible box 116 is driven by a pair of transport rollers 114 that are driven to rotate in accordance with the opening and closing timing of a clamper (not shown) of a plate cylinder.
And wound around the outer peripheral surface of the plate cylinder. As shown in FIG. 8, the roll-shaped master 100 is wound around a core material 124, and the terminal end thereof is bonded and fixed to the core material 124. This is because the core material 124 and the master 100
This is because the removal work is easier when the remainder is attached, and it is easier to throw away.

A mark (for example, black) 126 indicating that the remaining amount of the master 100 is small is attached to one side of the portion where the remaining amount of the master 100 has reached a predetermined length. Sensor 11
8 detects this. Marking 12
When 6 appears and the master presence / absence sensor 118 turns off, "No master" is displayed on an operation panel (not shown), and the operator performs a master replacement operation based on this display.

In order to prevent a problem caused by the loss of the master 100 during the plate making operation, a length of about one plate corresponding to the maximum size of the sheet to be used remains from the leading end to the trailing end of the marking 126 of the master 100. It is set as follows.

[0009]

In the above-described conventional configuration, when the marking 126 appears during the plate making operation, the master can be used efficiently. However, the master that has been made has a length of one plate. When the master is detected at the position and the master of the next plate is detected by the master leading edge detection sensor 122 and conveyed a predetermined distance, the master presence / absence sensor 118 is turned off.
"No Master" is displayed and plate making is no longer possible. In this case, the amount of master to be discarded is marked 1
In addition to the length of about one plate with 26, the length up to the master leading edge detection sensor 122 is also a problem, and there is a problem from the viewpoint of economical use of the master.

Accordingly, an object of the present invention is to provide a stencil printing apparatus capable of suppressing uneconomical effects of a master and contributing to reduction of printing cost.

[0011]

A master whose end is separated from the roll core is used.
It is determined whether or not plate making is possible. If not possible, the master is wound around the plate cylinder and the plate discharging process is performed as it is. This is the purpose of the present invention.

More specifically, according to the first aspect of the present invention, plate-making means for making a master which is unwound from a roll state, a plate cylinder on which the plate-made master is wound on an outer peripheral surface, and The master making means includes a master set detecting means for detecting a set state of the master, and a master cutting means for cutting the master at a predetermined position. In the stencil printing apparatus, when the master end is detected by the master set detecting means during stencil making, the control means calculates the amount of masters that can be sent from the time of the detection, and determines the amount of master feeding for one plate. It is configured to determine whether or not it can be obtained, and to perform subsequent control based on the determination result.

According to a second aspect of the present invention, in the stencil printing machine according to the first aspect, when it is determined that the feed amount of the master for one plate cannot be obtained, the master is temporarily wound around the plate cylinder. Thereafter, the wound master is discharged by the plate discharging means, and the absence of the master is output and displayed.

According to a third aspect of the present invention, in the stencil printing apparatus of the first aspect, when it is determined that the master feed amount for one plate can be obtained, a normal printing operation is executed,
Thereafter, the remaining master is wound around the plate cylinder, the master is then discharged by the plate discharging means, and the absence of the master is output and displayed.

According to a fourth aspect of the present invention, in the stencil printing apparatus according to the first aspect, when it is determined that the master feed amount for one plate can be obtained, when the remaining master amount is less than a predetermined length, The whole master is wound around the plate cylinder without being cut by the master cutting means, and thereafter, the wound master is discharged by the plate discharging means and the absence of the master is output and displayed.

According to the invention described in claim 5, claim 2 or 4
In the stencil printing apparatus described above, a stencil making operation for the master is stopped when a determination is made.

According to a sixth aspect of the present invention, plate making means for making a master unwound from a roll state, a plate cylinder on which the master made is wound on the outer peripheral surface, and plate discharging means for peeling the master from the plate cylinder And stencil printing apparatus having a control means for controlling these operations, wherein the stencil making means has a master set detecting means for detecting a set state of a master, wherein the master set detecting means is provided from a stencil making position of the stencil making means. It is provided at a position shorter than the margin length of the printing paper upstream, and when the master end is detected by the master set detection means during plate making, the control means temporarily winds the master around the plate cylinder, Thereafter, control is performed to discharge the wound master by the plate discharging means, and the absence of the master is output and displayed.

According to a seventh aspect of the present invention, in the stencil printing apparatus of the sixth aspect, the master making operation for the master is stopped when the master end detecting means detects the end of the master.

According to an eighth aspect of the present invention, a plate making means for making a master fed from a roll state, a plate cylinder on which the master made is wound on the outer peripheral surface, and a plate discharging means for peeling the master from the plate cylinder. And a control means for controlling these operations, wherein the stencil making means has a stencil printing apparatus having a master set detecting means for detecting a set state of a master. Master end detecting means for detecting the end of the master at a position shorter than the length of the margin of the printing paper upstream from the plate making position, and the master end detecting means detects the master end during the plate making. When the control is performed, the control means executes a control of once winding the master on the plate cylinder, and then performing the control of discharging the wound master by the plate discharging means. It adopts a configuration that, to display.

According to a ninth aspect of the present invention, in the stencil printing apparatus according to the eighth aspect, the master making operation for the master is stopped when the master end detecting means detects the master end.

According to a tenth aspect of the present invention, in the stencil printing apparatus according to the first aspect, a roll-shaped master whose end can be separated from the core material by a conveying force is used. I am taking it.

According to an eleventh aspect of the present invention, in the stencil printing apparatus according to any one of the first to ninth aspects, a roll-shaped master whose end is fixed to the core material with a weak adhesive force is used. It has a configuration.

According to a twelfth aspect of the present invention, in the stencil printing apparatus according to one of the first to ninth aspects, a roll-shaped master having no core material is used.

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. First, a schematic configuration of a stencil printing apparatus 2 according to the present embodiment will be described with reference to FIG. The stencil printing apparatus 2 includes an image reading unit 4, a plate cylinder 6, a plate making unit 8 as a plate making unit, a paper feeding unit 10, and a press that is controlled to be moved toward and away from the plate cylinder 6 by a not-shown contacting / separating unit. It has a press roller 12 as a member, a paper discharge claw 14, which is arranged near the paper discharge side of the plate cylinder 6, a paper discharge conveyance means 16, a paper discharge tray 18, a plate discharge means 20, and the like. Although not shown, the plate cylinder 6 has a base formed by rolling a thin metal plate such as a stainless steel plate into a cylindrical shape, and the outer peripheral surface of the base is used to hold a master wound around the outer peripheral surface of the plate cylinder 6. The clamper 22
Is provided.

The base is provided with a large number of fine through-holes having a diameter of about 0.1 to 0.5 mm, so that the supplied ink can be leached to the outer surface. The plate cylinder 6 is rotatably supported by a support shaft 24 also serving as an ink supply pipe, and an ink supply means 26 is provided inside. The ink supply means 26 has an ink roller 28 for supplying ink to the inner peripheral surface of the plate cylinder 6, a doctor roller 30, and the like. The ink supplied from the support shaft 24 to the ink reservoir 32 via a distribution pipe (not shown) is supplied to the ink roller 28 with its thickness regulated by the doctor roller 30, and the ink is supplied when the press roller 12 presses the printing paper P. The roller 28 comes into contact with the inner peripheral surface of the plate cylinder 6 to supply ink.

The paper supply means 10 separates the loaded print papers P one by one in cooperation with a separating member (not shown) in order from the top of the paper supply table 34 on which the print papers P are loaded. It has a feed roller 36 for feeding, a pair of registration rollers 38 for stopping the fed printing paper P once and correcting the oblique deviation or the like, and then feeding the registration sheet 38 to the transfer portion of the plate cylinder 4 at a predetermined timing. . The paper discharging and conveying means 16 has a conveying belt 44 driven by a driving pulley 40 and a driven pulley 42, and a suction fan 46, and the printed printing paper P separated from the plate cylinder 6 by the paper discharging claws 14. The non-image surface (back surface) is transported by suction. The plate discharging means 20 includes separation rollers 48 and 50, plate discharging rollers 52 and 54, transport belts 56 and 58 stretched between these rollers, and a plate cylinder 6.
And a compression plate 62 for compressing the master in the plate discharge box 60 for accommodating the master separated from the outer peripheral surface of the plate.

Next, the printing operation of the stencil printing machine 2 will be briefly described. Based on the read image information of the original by the image reading means 4, the master making unit 8 performs perforating and making a master on the master 64, and the master made master 64 is clamped at its leading end by the clamper 22 of the plate cylinder 6. It is wound around the outer peripheral surface of the plate cylinder 6 as it rotates. After the master 64 is wound, the plate attaching operation is performed. The leading edge of the image on the plate cylinder 6 and the printing paper P
The printing paper P is sent by the pair of registration rollers 38 at a timing when the predetermined position in the transport direction coincides with the printing paper P, and the printing paper P is pressed against the printing drum 6 by the press roller 12 that moves toward the printing drum 6 at this timing. Is done. The ink supplied to the inner peripheral surface of the plate cylinder 6 by the ink roller 28 oozes out of the perforated portion of the master 64 through the fine through holes of the base, and is transferred to the printing paper P. Thus, an ink image is formed on the printing paper P. The printing paper P on which the ink image has been transferred is peeled off from the plate cylinder 6 by the paper ejection claws 14, and the paper ejection tray 18 (not shown) by the paper ejection conveyance means 16.
Conveyed toward. When printing of a predetermined number of sheets is completed, the used master 64 is separated from the plate cylinder 6 by the plate discharging means 20.

Next, the plate making unit 8 will be described with reference to FIG. The plate making unit 8 has a unit frame 66, and the unit frame 66 is detachably provided to the apparatus main body via a guide member 67. In the unit frame 66, a roll-shaped master 64, a master set roller 68 and a set plate 70, a master set sensor 72 as a master set detecting means for detecting a set state of the master, a thermal head 74,
A platen roller 76 that presses the master 64 against the thermal head 74 and conveys it, a pair of conveying rollers 78, a master cutting unit 80, a master tip sensor 82, and a pair of conveying rollers 8.
4, a guide 86 for guiding the leading end of the master 64 to the clamper 22 of the plate cylinder 6 at the time of plate feeding, a bending box 88 and the like. The master 64 is formed in a roll shape by being wound around the core 65, and the terminal end thereof is fixed to the core 65 with a weak adhesive force (a force enough to be peeled off by the conveying force of the master 64). 11). The master cutting means 80 is of a guillotine type, and includes a movable blade 80a and a fixed blade 80a.
b. The flexible box 88 is provided with a guide plate 88a that is selectively set at a position where the master 64 is transported and a position where the master 64 is stored.
b is provided. In the present embodiment, the conventional master presence / absence sensor does not exist, and the function of the master set sensor 72 is also used.

Each operation of the stencil printing apparatus 2 is controlled by control means 90 shown in FIG. The control means 90 controls the CP
A microcomputer including U, ROM, RAM, I / O interface, etc.
2. A detection signal from the master tip sensor 82 and the like and setting information from the operation panel 92 are input. The control means 90
The thermal head 74, the platen motor 91, the operation panel 92 and the like are controlled based on these information.

Next, based on the timing chart of FIG. 4, a method of using the master set sensor 72 when setting the plate making unit 8 in the apparatus main body, master auto loading, and jam detection will be described. When the plate making unit 8 is mounted on the main body of the apparatus, a plate making unit set switch,
The master set sensor 72 and the master presence / absence sensor (the conventional case) are turned on. Conventionally, when the master presence / absence sensor is on and the master set sensor 72 is off, it is determined that the master is set incorrectly. In the present embodiment, since there is no master presence / absence sensor, when the master set sensor 72 is off, it is determined that a master set error has occurred.

One second after the plate making unit set switch is turned on, the platen pressure motor is turned on. Thereafter, the platen motor 91, the solenoid of the guide plate 88a, and the drive clutch of the transport roller pairs 78 and 84 are turned on. These are conveyed 18 mm after the master tip sensor 82 is turned on, and then turned off. If the master leading edge sensor 82 does not turn on even after 5 seconds from the turning on of the platen motor 91, it is determined that the master misfeed has occurred (first check). A second check is performed 500 ms after the platen pressure motor is turned off, and if the master leading edge sensor 82 is off, it is determined that a master misfeed has occurred.

Next, plate making control and control when the end of the master 64 is detected will be described with reference to the flowchart of FIG. When a prepress processing start command is issued (S1),
The platen motor 91 is driven (S2), and it is checked whether or not the master has been fed by a specified amount (one plate) (S2).
3). If the specified amount has been sent, the platen motor 9
1 is stopped (S4), and the master 64 is disconnected by the master disconnecting means 80 (S5). The master 64 on which the plate has been made is wound around the outer peripheral surface of the plate cylinder 6 (S6), the printing paper P is supplied and a plate attaching process is performed (S7), and the plate making process ends (S8).

The master set sensor 72 is turned on during plate making.
OFF is checked (S9), and the master set sensor 72 is turned off.
When the end of the master is detected, that is, when the master set sensor 72 is turned off, the control means 90 calculates the amount of the master that can be sent from the time of the detection and obtains the master's feed amount for one version. It is determined whether it is (S10).
The control means 90 performs subsequent control based on the determination result (claim 1). Master 64 until termination is detected
Is conveyed by the control unit 90 based on the number of steps of the platen roller 76, and the control unit 90 uses the master set sensor 72 to count the conveyance amount of the master 64 (for example, the center position of the platen roller 76). Is calculated (the amount of the remaining master), and it is determined whether or not the amount of the remaining master 64 can secure one plate. The amount of the remaining master 64 is experimentally grasped as a quantitative value as a transport amount from the master set sensor 72 to a reference position where the transport amount of the master 64 is counted.
It may be stored in the OM. In this case, the calculation by the control unit 90 becomes unnecessary (the same applies to other embodiments).

When it is determined that the feed amount of the master 64 for one version cannot be obtained, it is checked whether the remaining portion of the master 64 has been sent (S11). The master 64 is wound around the outer peripheral surface of the plate cylinder 6 in the same manner as in the plate feeding step (S12), and the master 64 on the plate cylinder 6 is discharged by the plate discharging means 20 without performing the plate attaching operation (S1).
3). Along with or after the plate discharging operation, the control means 90 outputs and displays "no master" on a liquid crystal display (not shown) of the operation panel 92 (S14). In other words, in the present embodiment, the remaining masters that cannot be made in plate making, which have been conventionally performed manually, are automatically performed using a normal plate feeding process. Since the end of the master 64 is separated from the core 65, when the plate making unit 8 is pulled out from the apparatus main body, only the core 65 remains in the plate making unit 8, and the operator takes out the core and removes the core into a new roll. Of the master 64 is set.

If it is determined in S10 that the master feed amount for one plate is obtained, it is checked whether the master 64 has been fed by the specified amount (S15), and a normal printing operation is executed. That is, the master 64 is cut at a predetermined length, wrapped around the outer peripheral surface of the plate cylinder 6 to perform a printing operation, and after printing a predetermined number of sheets, the used master 64 is discharged. It is peeled from the plate cylinder 6 by means 20. Thereafter, the remaining master 64 is wound around the outer peripheral surface of the plate cylinder 6 in the same manner as in the ordinary plate feeding process, and the master 64 on the plate cylinder 6 is discharged by the plate discharging means 20 without performing the plate attaching operation. And
The control means 90 outputs and displays "no master" on a liquid crystal display (not shown) of the operation panel 92 (claim 3).

Even if it is determined that the master feed amount for one plate can be obtained, if the amount of the remaining master 64 is equal to or less than the predetermined length, the length of one plate is cut without being cut by the master cutting means 80. Is wound around the outer peripheral surface of the plate cylinder 6, and the plate discharging means 20 discharges the master 64 on the plate cylinder 6 without performing the plate attaching operation. And control means 9
0 outputs and displays "no master" on a liquid crystal display (not shown) of the operation panel 92 (claim 4). Here, the “predetermined length” means a distance between the pair of conveying rollers 78 and 84. If the length is shorter than this length, the master 64 cannot be transported by the transport roller pairs 78 and 84, and the cut-off master 64 after cutting may remain in the transport path and be difficult for the operator to remove. .

In the case where the remaining master 64 is subjected to the plate discharging process without performing the normal printing operation, when it is determined whether or not the master feed amount for one plate can be obtained, the plate making operation for the master 64 is stopped. (Claim 5). That is, the control means 90 stops driving the thermal head 74 at the time when the determination is made. Even if the stencil making is continued, the stencil is not provided for printing, so that the stencil making on the master 64 which is subsequently subjected to the plate discharging process becomes meaningless. If the plate making operation is stopped when the judgment is made, unnecessary heating operation of the heating element of the thermal head 74 can be avoided.
There is an advantage that the temporal deterioration of the thermal head 74 can be suppressed.

The master set sensor 72 is provided at a position shorter than the length of the margin of the printing paper P (the margin on the rear end side in the transport direction) from the plate making position (the position punched by the thermal head 74; the same applies hereinafter) upstream in the master transport direction. Alternatively, it may not be determined whether a master's feed amount for one version can be obtained. That is, when the end of the master 64 is detected during the plate making, the master set sensor 72 is provided at a position where the feed amount of the master 64 for one plate cannot be obtained. When the end of the master 64 is detected during plate making, the control means 90 immediately winds the master 64 on the outer peripheral surface of the plate cylinder 6, and removes the master 64 on the plate cylinder 6 by the plate discharging means 20 without performing the plate attaching operation. Discharge the plate. And
"No master" is displayed on the LCD panel (not shown) of the operation panel 92.
Is output and displayed (claim 6). In this case, when the end of the master is detected by the master set sensor 72, the plate making operation for the master 64 may be stopped. If the plate making operation is stopped when the end is detected, unnecessary heating operation of the heating element of the thermal head 74 can be avoided, and thus there is an advantage that temporal deterioration of the thermal head 74 can be suppressed.

As shown in FIG. 6, while maintaining the position of the conventional master set sensor 72, printing is performed between the master set sensor 72 and the plate making position and upstream from the plate making position in the master transport direction. A configuration may be adopted in which a master end detection sensor 94 as master end detection means for detecting the end of the master 64 is provided at a position shorter than the length of the margin of the sheet P (the margin on the rear end side in the transport direction). When the end of the master 64 is detected by the master end detection sensor 94 during plate making, the control means 90 immediately winds the master 64 around the outer peripheral surface of the plate cylinder 6 and performs the plate cylinder by the plate discharge means 20 without performing the plate attaching operation. The master 64 on 6 is discharged. Then, "no master" is output and displayed on a liquid crystal display (not shown) of the operation panel 92 (claim 8). Also in this case, when the master end detection sensor 94 detects the master end, the master 64
May be stopped. If the plate making operation is stopped when the end is detected, unnecessary heating operation of the heating element of the thermal head 74 can be avoided, and thus there is an advantage that temporal deterioration of the thermal head 74 can be suppressed.

In each of the above embodiments, the roll-shaped master 64 wound around the core 65 is used. (Claim 1)
2).

[0041]

According to the first aspect of the present invention, when the master end is detected by the master set detecting means during plate making, the amount of master that can be fed from the time of the detection is calculated.
It is determined whether or not the master's feed amount for the plate can be obtained, and the subsequent control is performed based on the determination result. Therefore, the wasteful amount of the master can be suppressed to one plate or less, The uneconomical effect on disposal can be suppressed. Further, since a sensor corresponding to the master presence / absence sensor is not required, the cost can be reduced. Further, since the marking process on the master is not required, it is possible to contribute to cost reduction in manufacturing the master.

According to the second aspect of the present invention, when it is determined that the feed amount of the master for one plate cannot be obtained, the master is temporarily wound around the plate cylinder, and thereafter, the master is wound by the plate discharging means. Since the master is discharged and the absence of the master is output and displayed, it is possible to easily replace the master by automatically discarding the master.

According to the third aspect of the present invention, when it is determined that the feed amount of the master for one plate can be obtained, a normal printing operation is executed, and thereafter, the remaining masters are wound around the plate cylinder. Then, the wound master is discharged by the plate discharging means,
Since the configuration is such that the absence of the master is output and displayed, it is possible to easily replace the master by automatically discarding the master.

According to the fourth aspect of the present invention, when it is determined that the master feed amount for one plate can be obtained, and when the remaining master amount is equal to or less than the predetermined length, the master is cut by the master cutting means. The entire master is wound around the plate cylinder, and then the wound master is discharged by the plate discharging means to output and display the absence of the master. Can be prevented.

According to the fifth aspect of the present invention, the plate making operation for the master is stopped when the judgment is made, so that the deterioration of the heating member for piercing the master with time can be suppressed.

According to the sixth aspect of the present invention, the master plate discharging process is executed immediately when the master end is detected by the master set detecting means during plate making, so that control can be facilitated.

According to the seventh aspect of the present invention, when the master end is detected by the master set detecting means, the plate making operation for the master is stopped, so that the deterioration of the heating member for piercing the master with time is suppressed. it can.

According to the eighth aspect of the present invention, the master plate discharging process is executed immediately when the master terminal is detected by the master terminal detecting means during plate making, so that control can be facilitated. Further, even with the conventional configuration, a function of avoiding the uneconomical effect of the master can be provided only by providing the master end detection means.

According to the ninth aspect of the present invention, the master making operation for the master is stopped when the master end is detected by the master end detecting means, so that the temporal deterioration of the heating member for piercing the master is suppressed. it can.

According to the tenth aspect of the present invention, since the roll-shaped master whose end can be separated from the core material by the conveying force is used, deformation in handling of the master is prevented by the shape preserving property of the core material. be able to.

According to the eleventh aspect of the present invention, deformation of the master during handling can be prevented by the shape retention of the core material.

According to the twelfth aspect of the present invention, since a roll-shaped master having no core material is used, the operator only needs to set a new master at the time of master replacement. It can be facilitated.

[Brief description of the drawings]

FIG. 1 is a schematic front view of a stencil printing apparatus according to an embodiment of the present invention.

FIG. 2 is an enlarged front view of the plate making unit.

FIG. 3 is a control block diagram.

FIG. 4 is a timing chart showing an operation at the time of setting a plate making unit.

FIG. 5 is a flowchart showing control based on a plate making operation and master end detection.

FIG. 6 is an enlarged front view of a plate making unit according to another embodiment.

FIG. 7 is a schematic front view of a conventional plate making unit.

FIG. 8 is a perspective view showing a conventional roll-shaped master.

[Explanation of symbols]

6 plate cylinder 8 plate making unit as plate making means 20 plate discharging means 64 master 65 core material 72 master set sensor as master set detecting means 80 master cutting means 94 master end detecting sensor as master end detecting means

Claims (12)

[Claims] 1. A plate making means for making a master fed from a roll state, a plate cylinder on which the master made by the plate is wound around an outer peripheral surface, and a plate discharging means for peeling the master from the plate cylinder.
A stencil printing machine having control means for controlling these operations, wherein the stencil making means has a master set detecting means for detecting a set state of the master and a master cutting means for cutting the master at a predetermined position; When the master end is detected by the master set detection means, the control means calculates the amount of masters that can be sent from the time of the detection and determines whether or not the master feed amount for one plate can be obtained. A stencil printing apparatus for performing subsequent control based on the determination result. 2. The stencil printing apparatus according to claim 1, wherein when it is determined that the feed amount of the master for one plate cannot be obtained, the master is temporarily wound around the plate cylinder, and thereafter the stencil discharging means is provided. A stencil printing apparatus, wherein the wrapped master is ejected and the master absence is output and displayed. 3. The stencil printing apparatus according to claim 1, wherein if it is determined that a master feed amount for one plate can be obtained, a normal printing operation is performed, and thereafter, the remaining masters are transferred to said plate cylinder. A stencil printing apparatus, wherein the master is wound and discharged by the plate discharging means, and the absence of the master is output and displayed. 4. The stencil printing machine according to claim 1, wherein when it is determined that the master feed amount for one plate can be obtained,
When the amount of the remaining master is equal to or less than a predetermined length, the entire master is wound around the plate cylinder without being cut by the master cutting means, and then the wound master is discharged by the plate discharging means. A stencil printing device characterized by displaying an output. 5. A stencil printing apparatus according to claim 2, wherein when a determination is made, the stencil making operation for the master is stopped. 6. A plate making means for making a master unrolled from a roll state, a plate cylinder around which the master made by the plate is wound around an outer peripheral surface, and a plate discharging means for peeling the master from the plate cylinder.
A stencil printing machine having control means for controlling these operations, wherein the stencil making means has a master set detecting means for detecting a set state of a master, wherein the master set detecting means is upstream from a stencil making position of the stencil making means It is provided at a position shorter than the length of the margin of the printing paper, and when the master end is detected by the master set detecting means during plate making, the control means temporarily winds the master around the plate cylinder, and thereafter, A stencil printing apparatus characterized in that the stencil discharging means controls the stencil discharge of the wound master and outputs an indication of no master. 7. A stencil printing apparatus according to claim 6, wherein when the master set detecting means detects the end of the master, the stencil making operation for the master is stopped. 8. A plate making means for making a master unwound from a roll state, a plate cylinder on which a master made by the plate is wound around an outer peripheral surface, and a plate discharging means for peeling the master from the plate cylinder.
A stencil printing machine having control means for controlling these operations, wherein the stencil making means has a master set detecting means for detecting a set state of a master; Master end detecting means for detecting the end of the master is provided at a position shorter than the length of the margin of the printing paper upstream from the plate making position, and the master end detecting means detects the master end during the plate making. A stencil printing apparatus, wherein the control means temporarily winds the master on the plate cylinder, thereafter executes control for discharging the wound master by the plate discharging means, and outputs and displays the absence of the master. . 9. A stencil printing apparatus according to claim 8, wherein when the master end detection means detects the master end, the stencil making operation for the master is stopped. 10. The stencil printing apparatus according to claim 1, wherein a roll-shaped master whose end can be separated from the core material by a conveying force is used. 11. A stencil printing apparatus according to claim 1, wherein a stencil printing machine is used, wherein a roll-shaped master whose end is fixed to a core material by a weak adhesive force is used. . 12. The stencil printing apparatus according to claim 1, wherein a roll-shaped master having no core material is used.