JP2002086882A - Plate delivering device, stencil printing equipment and master stencil paper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent leakage of secrets from delivered masters. SOLUTION: The plate delivering device has a master stripping-off mechanism 25 f or stripping off a master 8 wound around the outer peripheral surface of a plate cylinder 2, a housing box 26 for housing the master 8 stripped off the outer peripheral surface of the plate cylinder 2 and a master heating mechanism 28 for thermally shrinking the master 8 housed in the housing box 26. Accordingly, the master 8, which is stripped off the outer peripheral surface of the plate cylinder 2 and then housed in the housing box 26, shrinks under heat through the driving of the master heating mechanism 28. Thus, even when the delivered master 8 or the thermally shrunk master 8 is seen, no one can know what it is the contents printed by the master 8, resulting in preventing the intelligent leak from developing through the delivered master 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stencil printer, a stencil printer provided with the stencil printer, and a master stencil having a structure suitable for use in the stencil printer.

[0002]

2. Description of the Related Art A stencil printing machine that forms a master by heating and melting and punching a master base paper and wraps the master around the outer peripheral surface of a plate cylinder to perform printing requires a master that has become unnecessary after printing. A plate discharging device for peeling the plate from the plate cylinder and discharging the plate is provided. Such a plate discharging device mainly includes a master peeling mechanism for peeling the master from the outer peripheral surface of the plate cylinder, and a storage box for storing the master peeled from the outer peripheral surface of the plate cylinder.

After the master housed in the storage box becomes full, the storage box is removed from the stencil printing machine, the master stored in the storage box is removed and discarded, and the empty storage box is removed. Is set on the stencil printing machine.

If the used master is discarded by the above-described procedure, and the master used for printing important documents requiring confidentiality is also discarded, the confidential information may leak from the discarded master.

[0005] Therefore, there is a demand that the contents printed by the master should not be recognized even if the master that has been discharged is viewed. Inventions that respond to such demands include:
As described in Japanese Patent Publication No. 5-61107, there is known an invention in which a discharged master is finely cut by a cutter.

[0006]

However, high-viscosity ink adheres to the discharged master, and if the master is to be cut into small pieces by a cutter, the master is transported to a mechanism for transporting the master. It is easy to wrap around and cause poor master discharge.

[0007] If the width of the cutting by the cutter is widened, it is possible to prevent master discharge failure due to wrapping of the master. However, if the width of the cutting is too large, the contents printed by the master can be understood by looking at the cut master. Become.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a stencil printing apparatus equipped with a stencil discharging device capable of preventing confidential leakage from a discharged master.

Another object of the present invention is to provide a master base paper suitable for preventing confidential leakage from a discharged master.

[0010]

According to a first aspect of the present invention, there is provided a plate discharging device for removing a master wound around an outer peripheral surface of a plate cylinder, and a master peeling mechanism for peeling off the master from the outer peripheral surface of the plate cylinder. And a master heating mechanism that heats and contracts the master housed in the storage box.

Therefore, the master peeled off from the outer peripheral surface of the plate cylinder is stored in the storage box, and the master heating mechanism is driven after the master is stored in the storage box, whereby the master stored in the storage box is driven. Is heated and shrinks. As a result, the discharged master, that is,
Even if the master that has been heated and shrunk is viewed, it is not clear what the content printed by the master is, and the leakage of confidentiality from the discharged master is prevented.

According to a second aspect of the present invention, in the plate discharging apparatus according to the first aspect, a heating driving means for driving the master heating mechanism by inputting a specific signal to a control unit is provided.

Accordingly, the master heating mechanism is driven by the heating driving means only when a specific signal, for example, a signal resulting from pressing of a plate making start key for making a new master is input to the control section. That is, the master heating mechanism is driven only when necessary, and the power consumption associated with driving the master heating mechanism is reduced.

According to a third aspect of the present invention, in the plate discharging apparatus according to the first aspect, a detection sensor for detecting that the amount of the master stored in the storage box has reached a predetermined amount, and the detection sensor And a heating drive unit that drives the master heating mechanism by inputting the detection result of the above to the control unit.

Therefore, only when the amount of the master stored in the storage box reaches the predetermined amount, the master heating mechanism is driven by the heating driving means. That is, the master heating mechanism is driven only when necessary, and the power consumption associated with driving the master heating mechanism is reduced.

[0016] The invention described in claim 4 is the invention according to claims 1 to 4.
The plate discharging device according to any one of the above, further comprising a cutting mechanism for cutting the master peeled from the outer peripheral surface of the plate cylinder.

Accordingly, since the master peeled off from the outer peripheral surface of the plate cylinder and stored in the storage box is cut by the cutting mechanism, the master is heated and contracted effectively by the driving of the master heating mechanism, and the heating is performed. When looking at the contracted master, it becomes even harder to know what the content printed on that master was.

A stencil printing apparatus according to a fifth aspect of the present invention is a stencil printing machine for making a master by heat-melting and perforating a master base paper, a plate cylinder around which the master thus formed is wound, and a plate cylinder inside the plate cylinder. The plate discharging device according to any one of claims 1 to 4, wherein the provided ink supply mechanism, the master peeled from the plate cylinder are discharged, and printing is performed on the master wound around the outer peripheral surface of the plate cylinder. And a pressing device for pressing the paper.

Therefore, when the master used in the stencil printing apparatus is discharged, the master is stored in a storage box of the stencil printing apparatus, and is then heated and shrunk by the master heating mechanism. Also, it is not possible to know what the content printed by the master is, and leakage of confidentiality from the master that has been discharged is prevented.

The master base paper according to the invention of claim 6 is formed by laminating a thermoplastic resin film and a support sheet, and the support sheet is formed by a porous resin film made of a heat-shrinkable resin.

Therefore, when the master base paper is used in the stencil printing apparatus according to the fifth aspect of the present invention, the master made from the master base paper is stored in the storage box of the plate discharging device and heated by the master heating mechanism. When done
Since both the thermoplastic resin film and the porous resin film are liable to contract, it is possible to effectively perform the heat contraction of the discharged master.

[0022]

FIG. 1 shows a first embodiment of the present invention.
A description will be given based on FIG. FIG. 1 is a vertical sectional front view showing the internal structure of the stencil printing apparatus, and FIG. 2 is a block diagram showing a control system of the stencil printing apparatus.

This stencil printing apparatus includes a stencil making device 1, a plate cylinder 2, a plate cylinder driving unit 3, an ink supply mechanism 4, a plate discharging device 5, a pressing device 6, a registration roller 7, and the like.

In the plate making apparatus 1, the master is made by heating and perforating the master base paper in accordance with image data read by a scanner (not shown) or image data transmitted from a personal computer or the like. The plate making apparatus 1 includes a holding shaft 9 for holding a master base paper 8a wound in a roll shape, and a plurality of heating elements.
a thermal head 10 that heats and perforates the master paper 8, a platen roller 11 that is driven to rotate by a stepping motor (not shown) to press the master paper 8 a against the thermal head 10, and a master paper 8 a that is heated and perforated by the thermal head 10 to a predetermined length. The cutter 12, the master base paper 8a, or the conveying rollers 13, 14, which convey the master 8 produced by cutting the master base paper 8a heated and melted by the thermal head 10 to a predetermined length by the cutter 12, The master 8 includes a guide plate 15 for guiding the master 8 toward the plate cylinder 2.

The master base paper 8a is formed by laminating a thermoplastic resin film and a support sheet, and a porous resin film made of a heat-shrinkable resin is used as the support sheet. The porous resin film is a film having a structure having a large number of voids inside and on the surface of the film, and it is desirable that the voids have a structure continuous in the thickness direction of the film from the viewpoint of ink permeability.

Examples of the resin material constituting the porous resin film include polyvinyl acetate, polyvinyl butyral, vinyl chloride-vinyl acetate copolymer, vinyl chloride-vinylidene chloride copolymer, vinyl chloride-acrylonitrile copolymer, styrene-acrylonitrile copolymer and the like. Examples thereof include vinyl resins, polyamides such as polybutylene and nylon, polyphenylene oxide, (meth) acrylate, polycarbonate, polyurethane, cellulose derivatives such as acetylcellulose, acetylbutylcellulose and acetylpropylcellulose. Two or more of the above resins may be mixed.

In order to control the formation, strength, pore size and the like of the porous resin, it is desirable to add an additive such as a filler to the porous resin as needed. This filler is a concept including pigments, powders, and fibrous substances. Among them, needle-like fillers are particularly preferable. Specific examples of the filler include magnesium silicate, sepiolite, potassium titanate, wollastonite, zonotolite, mineral needle fillers such as gypsum fiber, non-oxide needle whiskers, oxide whiskers, and multiple oxides. Examples include artificial mineral needle-like fillers such as whiskers, and plate-like fillers such as mica, glass flake, and talc.

The plate cylinder 2 is formed by winding a plurality of resin or metal mesh screens around the outer periphery of a porous cylindrical body and fixing flanges to both ends of the porous cylindrical body. Is wound, and is rotationally driven around an axis via a plate cylinder driving unit 3 including a motor and a gear train. A stage 16 and a clamper 17 for holding the leading end of the master 8 wound around the outer peripheral surface are provided on the outer peripheral portion of the plate cylinder 2.

The ink supply mechanism 4 is provided inside the plate cylinder 2 and is a mechanism for supplying ink used for printing into the plate cylinder 2. The ink supply mechanism 4 is disposed with a small gap between the ink pipe 18 also serving as a holding shaft for rotatably holding the plate cylinder 2 and the inner peripheral surface of the plate cylinder 2 and in the same direction as the plate cylinder 2. The ink roller 19 which is driven to rotate, the doctor roller 20 disposed in parallel with the ink roller 19 with a small gap between the ink roller 19, and a cross-sectional shape formed between the ink roller 19 and the doctor roller 20 are substantially formed. It is composed of a wedge-shaped ink reservoir 21 and the like. Ink is supplied through an ink pipe 18 by driving an ink pump (not shown), and the ink flows out of a plurality of ink holes 18 a formed in the ink pipe 18 and accumulates in an ink reservoir 21. . The ink accumulated in the ink reservoir 21 is supplied to the inner circumferential surface of the plate cylinder 2 by the rotation of the ink roller 19, and the ink passes through the hole of the plate cylinder 2 and oozes out of the perforated portion of the master 8 to be supplied. Printing is performed by transferring to printing paper (not shown) fed from a paper tray (not shown).

The pressing device 6 is a device for pressing the printing paper fed from the paper feeding unit against the master 8 wound around the outer peripheral surface of the plate cylinder 2. An arm 23 whose one end is rotatable about the support shaft 22, a press roller 24 attached to the other end of the arm 23, a motor (not shown) that reciprocates the arm 23 about the support shaft 22, and the like. It is configured.

The registration roller 7 moves the printing paper fed from the paper feeding tray to the printing position (the plate cylinder 2 and the press roller 24).
And a roller for adjusting the timing of feeding the sheet to the plate cylinder 2, and is intermittently driven to rotate in synchronization with the rotation timing of the plate cylinder 2.

The plate discharging device 5 is a device for removing and storing the master 8 wound around the outer peripheral surface of the plate cylinder 2. The plate discharging device 5 includes a master peeling mechanism 25 for peeling off the master 8 wound on the outer peripheral surface of the plate cylinder 2 and a storage box 2 for storing the master 8 peeled from the outer peripheral surface of the plate cylinder 2.
6, a compression plate 27 driven to compress the master 8 stored in the storage box 26, a master heating mechanism 28 for heating and contracting the master 8 stored in the storage box 26, and the like. .

The master peeling mechanism 25 is provided with a plurality of sets of plate discharging belts 30 wound up and down between a pair of rollers 29, at least one of which is rotationally driven, provided along the axial direction of the plate cylinder 2. It is configured. Further, the master peeling mechanism 25 is provided so as to be freely movable in a direction in which the master peeling mechanism 25 comes into and out of contact with the plate cylinder 2. When peeling the master 8 from the outer peripheral surface of the plate cylinder 2, the plate discharge belt 30
Is moved to the side of the plate cylinder 2 to a position where it comes into contact with the master 8 wound around the outer peripheral surface of the plate cylinder 2, and the roller 29 is driven at that position to rotate the plate discharge belt 30. As a result, the master 8 wound around the outer peripheral surface of the plate cylinder 2 is nipped and pulled by the pair of plate discharging belts 30 in the upper and lower directions, and is peeled from the outer peripheral surface of the plate cylinder 2 by rotating the plate cylinder 2, The peeled master 8 is sent into the storage box 26.

The compression plate 27 is driven by a motor and slides downward to compress the master 8 stored in the storage box 26. The downward sliding of the compression plate 27 is performed at a timing immediately after the discharged master 8 is stored in the storage box 26.

The master heating mechanism 28 includes a blower fan 31,
It comprises a heater 32, a cylindrical body 33 and the like. The air heated by the heater 32 is blown into the storage box 26 by the driving of the blower fan 31 and is discharged from the opening on the plate discharging belt 30 side. In this process, the master 8 floating in the air is heated, It is effectively shrunk.

The storage box 26 is detachably attached to the main body of the stencil printing apparatus. When the storage box 26 is full of the discharged master 8, the storage box 26 is removed from the stencil printing machine, and the master (heated and contracted master) 8 stored therein is removed.
Remove and discard.

As shown in FIG. 2, the control system of the stencil printing apparatus includes, as a main component, a control unit 34 having a microcomputer having a CPU, a ROM, and a RAM.
The control unit 34 is connected to the plate making device 1, the plate cylinder driving unit 3, the plate discharging device 5, the pressing device 6, an operation panel 35 having various input operation keys, and the like.

In the stencil printing apparatus, a heating drive unit is provided as a function of the control unit 34. The heating drive unit switches the heater 32 and the blower fan 31 when a specific signal, for example, a signal due to pressing of a plate making start key provided on the operation panel 35 is input to the control unit 34. It is a function to drive.

In such a configuration, in the stencil printing apparatus, the master 8 makes a master 8 in accordance with image data read by a scanner or image data transmitted from a personal computer or the like.
Is wound around the outer peripheral surface of the plate cylinder 2. After the winding of the master 8 around the outer peripheral surface of the plate cylinder 2 is completed, a printing start key provided on the operation panel 35 is pressed, so that printing paper is fed from the paper feed tray, and the printing paper is fed. Is pressed against the master 8 wound around the outer peripheral surface of the plate cylinder 2 by the press roller 24, whereby printing on the printing paper is performed. Printing is continued until printing of the set number of sheets is completed.

When the printing of the set number has been completed and the next printing is to be performed, it is necessary to peel off the master 8 wound on the outer peripheral surface of the plate cylinder 2 from the outer peripheral surface of the plate cylinder 2 and discharge the plate. This plate discharging process is performed in the plate discharging device 5.

This plate discharging process is started when a plate making start key on the operation panel 35 is pressed. First,
The entire master peeling mechanism 25 moves to the plate cylinder 2 side, and the roller 29 is driven to rotate the plate discharge belt 30, and the master 8 is pinched by the pair of plate discharge belts 30 vertically and the outer periphery of the plate cylinder 2. The master 8, which has been peeled off from the surface, is fed into the storage box 26 by the stencil discharge belt 30, and at the same time, energization of the blower fan 31 and the heater 32 is started. The heated air is blown to the master 8 sent into the inside, so that the master 8 is heated and contracted while floating in the air. The contracted master 8 is stored in the storage box 26. At the timing when the master 8 is fed into the storage box 26, the power supply to the blower fan 31 and the heater 32 is stopped, and then the compression plate 27 is slid downward and the master retracted and stored in the storage box 26. 8 is compressed.

As described above, since the master 8 discharged from the plate and stored in the storage box 26 is heated and contracted, after the storage box 26 is filled with the master 8, the master 8 is removed from the storage box 26. Even if the master 8 taken out and discarded is viewed, the contents printed by the master 8 are completely unknown, and the leakage of confidentiality from the discharged master 8 can be reliably prevented. it can.

The master 8 used in the stencil printing apparatus of the present embodiment is formed by laminating a thermoplastic resin film and a porous resin film made of a heat-shrinkable resin. When the master 8 is heated by the master heating mechanism 28, both the thermoplastic resin film and the porous resin film tend to shrink, so that the master 8 that has been discharged can be effectively contracted by heating.

Further, by heating and contracting the master 8 in the storage box 26, the amount of the master 8 that can be stored in the storage box 26 can be increased. Frequency can be reduced.

Further, since the master heating mechanism 28 is driven only when a signal due to the press of the plate making start key is input to the control section 34, the master heating mechanism 28 is driven only when necessary. Therefore, power consumption accompanying driving of the master heating mechanism 28 can be suppressed.

In this embodiment, the case where the master 8 peeled off from the plate cylinder 2 is heated and shrunk in the process of being fed into the storage box 26 and then compressed by the compression plate 27 after the heat shrinkage has been described. The procedure may be changed.
For example, when the master 8 is fed into the storage box 26 by the plate discharge belt 30, the compression plate 27
Is slid downward to compress the master 8 stored in the storage box 26, and at the timing when the compression plate 27 returns to the upper position, the blower fan 31 and the heater 32 are driven to be stored in the storage box 26. The master 8 may be heated and contracted.

Further, in this embodiment, the case where the master heating mechanism 28 is driven every time the master 8 is discharged is described as an example. However, a dedicated key for driving the master heating mechanism 28 is provided on the operation panel. The key may be operated on the master heating mechanism 28 by operating the key only when discharging the master 8 whose confidentiality is desired to be maintained.
In this case, the frequency of driving the master heating mechanism 28 is reduced, and the power consumption accompanying the driving of the master heating mechanism 28 can be further suppressed.

Also, in the present embodiment, the case where the master 8 formed by laminating a porous resin film made of a thermoplastic resin film and a heat-shrinkable resin is used as the master 8 has been described as an example. However, for the purpose of reinforcing the master (including the one coated with a stick preventive agent or the like) made of only a thermoplastic resin film or the surface of a porous resin film, a low-weight reinforcing layer made of ultrafine fibers such as PET was laminated. A master may be used. In the case of a master using a reinforcing layer, it is necessary to increase the capacity of the heater 32.

Next, a second embodiment of the present invention will be described with reference to FIG.
It will be described based on. 1 and 2 are denoted by the same reference numerals, and description thereof is omitted (the same applies to the following embodiments).

In this embodiment, a detection sensor 36 for detecting that the master 8 stored in the storage box 26 has reached a predetermined amount (full) is provided, and a signal from this detection sensor 36 is sent to the control unit 34. The master heating mechanism 28 is driven by the heating drive means upon input. Other structures and mechanisms are the same as in the first embodiment. The detection sensor 36 detects whether or not the master 8 in the storage box 26 is full based on the detection result of the compression plate 27 that compresses the master 8. For example, storage box 2
6, the compression plate 27 cannot slide to the position of the detection sensor 36,
Is determined to be full when the compression plate 27 cannot be detected.

In such a configuration, the detection sensor 36
When the control unit 34 determines that the master 8 in the storage box 26 is full based on the detection result from the controller 32, the master heating mechanism 28 is driven by the heating driving unit, and the heater 32 is energized and the blower fan 31 is turned off. Driving is performed, the air heated by the heater 32 is blown into the storage box 26, and the master 8 stored in the storage box 26 is heated and contracted. Since the master 8 that has been discharged and stored in the storage box 26 is heated and shrunk, when the master 8 is removed from the storage box 26 and discarded, the discarded master 8 is viewed. However, the contents printed by the master 8 are completely unknown, and leakage of confidentiality from the discharged master 8 can be reliably prevented.

In this embodiment, the storage box 2
When the master 8 accommodated in the master 6 becomes full,
Since the master heating mechanism 28 is driven immediately before discarding the master heating mechanism 28, the frequency of driving the master heating mechanism 28 is extremely reduced, and the power consumption associated with driving the master heating mechanism 28 can be further suppressed.

In the present embodiment, it is effective to add a mechanism that allows the storage box 26 to be removed only after the master heating mechanism 28 has been driven. As a result, leakage of confidential information from the discharged master 8 can be reliably prevented.

In the present embodiment, the storage box 2
6 has been described as an example in which the master heating mechanism 28 is driven only when the detection sensor 36 detects that the master 8 in the cartridge 6 is full. The structure may be such that the master heating mechanism 28 is driven every time the master 8 stored in the inside 26 reaches a predetermined amount.

Next, a third embodiment of the present invention will be described with reference to FIG.
It will be described based on. In the present embodiment, the storage box 26a includes a heater 37 provided as a master heating mechanism on the entire inner peripheral surface, and a heat insulating material 38 provided outside the heater 37. Other structures are the same as those of the first embodiment.

In such a configuration, the storage box 2
Since the entire inner peripheral surface of 6a is heated, the storage box 2
Heat contraction of the master 8 stored in the inside 6a can be effectively performed.

Next, a fourth embodiment of the present invention will be described with reference to FIG.
It will be described based on. In the present embodiment, the plate discharging device 5
Further, a cutting mechanism 39 for cutting the master 8 peeled from the outer peripheral surface of the plate cylinder 2 into a plurality of strips is provided. The cutting mechanism 39 includes a rotating shaft 40 driven to rotate by a motor.
And a plurality of disc-shaped cutters 41 fixed to the rotating shaft 40.

In such a configuration, when the master 8 peeled from the outer peripheral surface of the plate cylinder 2 by the master peeling mechanism 25 is stored in the storage box 26, the master 8 is separated into a plurality of strips by the disc-shaped cutter 41. It is cut to. The cutting according to the present embodiment is a rough cutting, and the cut master 8 does not wind around the rotating shaft 40.

For this reason, when the master heating mechanism 28 is driven to heat and shrink the master 8, the heat shrinkage of the master 8 is more effectively performed. It becomes even harder to understand what the contents printed are.

[0060]

According to the plate discharging device of the present invention, the master peeled from the outer peripheral surface of the plate cylinder and stored in the storage box can be contracted by heating by the master heating mechanism. As a result, even if the master that has been discharged, that is, the master that has shrunk by heating, cannot be seen, the contents printed by that master will not be understood, and leakage of confidentiality from the discharged master is ensured. Can be prevented.

According to the second aspect of the present invention, in the plate discharging apparatus according to the first aspect, a heating drive unit for driving the master heating mechanism by inputting a specific signal to the control unit is provided. Only when a specific signal, for example, a signal caused by pressing a plate making start key for making a new master is input to the control unit, the master heating mechanism can be driven by the heating driving unit, and therefore, The master heating mechanism is driven only when necessary, and power consumption associated with driving the master heating mechanism can be suppressed.

According to the third aspect of the present invention, in the plate discharging apparatus according to the first aspect, a detection sensor for detecting that the amount of the master stored in the storage box has reached a predetermined amount, and the detection sensor Since a heating drive unit that drives the master heating mechanism by inputting a detection result from the sensor to the control unit is provided, when the amount of the master stored in the storage box reaches a predetermined amount, Only the master heating mechanism can be driven by the heating drive means, and therefore, the master heating mechanism is driven only when necessary, so that power consumption associated with driving the master heating mechanism can be suppressed.

According to the fourth aspect of the present invention, in the plate discharging apparatus according to any one of the first to fourth aspects, a cutting mechanism for cutting the master peeled from the outer peripheral surface of the plate cylinder is provided. Since the master peeled off from the outer peripheral surface of the plate cylinder and stored in the storage box is cut by the cutting mechanism, the master can be effectively heated and contracted by driving the master heating mechanism. When the master is viewed, it becomes more difficult to know what the contents printed by the master are, and the confidential leakage from the master can be more reliably prevented.

According to the stencil printing apparatus of the invention described in claim 5, since the stencil printing apparatus of any one of claims 1 to 4 is provided, it is possible to heat and shrink the discharged master, whereby the heating is performed. When looking at the contracted master, it is not possible to know what the content printed by that master is, and it is possible to reliably prevent the secret from being discharged from the master.

According to the master base paper of the sixth aspect of the present invention, the master base paper is formed by laminating a thermoplastic resin film and a support sheet, and the support sheet is formed by a porous resin film made of a heat-shrinkable resin. Therefore, when this master base paper is used in the stencil printing apparatus according to the fifth aspect of the present invention, when the master made from the master base paper is stored in the storage box of the plate discharging device and heated by the master heating mechanism. Since both the thermoplastic resin film and the porous resin film are liable to contract, it is possible to effectively perform the heat contraction of the discharged master.

[Brief description of the drawings]

FIG. 1 is a vertical sectional front view showing an internal structure of a stencil printing apparatus according to a first embodiment of the present invention.

FIG. 2 is a block diagram illustrating a control system of the stencil printing apparatus.

FIG. 3 is a longitudinal sectional front view showing a plate discharging device which is a part of a stencil printing device according to a second embodiment of the present invention.

FIG. 4 is a vertical sectional front view showing a plate discharging device which is a part of a stencil printing device according to a third embodiment of the present invention.

FIG. 5 is a perspective view showing a plate discharging device which is a part of a stencil printing device according to a fourth embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 plate making device 2 plate cylinder 4 ink replenishing mechanism 5 plate discharging device 6 pressing device 8 master 8 a master base paper 25 master peeling mechanism 26, 26 a storage box 28, 37 master heating mechanism 34 control unit 36 detection sensor 39 cutting mechanism

Claims (6)

[Claims] 1. A master peeling mechanism for peeling off a master wound around an outer peripheral surface of a plate cylinder, a storage box in which the master peeled from the outer peripheral surface of the plate cylinder is stored, and a storage box stored in the storage box. And a master heating mechanism for heating and contracting the master. 2. The plate discharging device according to claim 1, further comprising a heating drive unit that drives the master heating mechanism when a specific signal is input to the control unit. A detection sensor for detecting that the amount of the master stored in the storage box has reached a predetermined amount; and a detection result from the detection sensor being input to a control unit, thereby causing the master heating to be performed. 2. The plate discharging device according to claim 1, further comprising a heating drive unit for driving the mechanism. 4. The plate discharging device according to claim 1, further comprising a cutting mechanism for cutting the master peeled from the outer peripheral surface of the plate cylinder. 5. A plate making device for making a master by heat-melting and perforating a master base paper, a plate cylinder around which the plate made master is wound, an ink supply mechanism provided inside the plate cylinder, and the plate A stencil having the plate discharging device according to any one of claims 1 to 4, wherein the master peeled from the cylinder is discharged, and a pressing device for pressing a printing sheet against the master wound around the outer peripheral surface of the plate cylinder. Printing device. 6. A master base paper formed by laminating a thermoplastic resin film and a support sheet, wherein the support sheet is formed by a porous resin film made of a heat-shrinkable resin.