JP3297711B2 - How to attach a stencil master - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for mounting a stencil master on a plate cylinder of a stencil making and printing apparatus in which a stencil master feeding device and a printing apparatus are integrally incorporated.

[0002]

2. Description of the Related Art FIG. 6 is a diagram schematically showing an outline of a conventional stencil printing machine in which a stencil making section and a printing section are integrated. In the figure, 70 is a stencil master, 71 is a master supply unit for winding and accommodating an unperforated stencil master 70, 72 is a stencil making unit having a platen roller 72a and a thermal head 72b, and 73 is a cut of the perforated stencil master 70 The reference numeral 74 denotes a transport mechanism for the stencil master 70, 75 denotes a printing unit, 76 denotes a plate cylinder, 76a denotes a peripheral wall, 77 denotes a plate discharging unit, and 78 denotes a printing sheet. In this apparatus, the stencil master 70 supplied from the master supply unit 71 is thermally perforated by the stencil making unit 72, and the stencil master 70 that has been thermally perforated is printed by the printing unit 7 by the transport mechanism 74.
After being conveyed to the plate cylinder 76 of No. 5, the cutter mechanism 7
At 3, a stencil master is cut as one sheet, wrapped around the peripheral wall 76 a of the plate cylinder 76, and stencil printing is performed on the printing paper 78 sent to the printing unit 75. After the printing is completed, the used master is transferred to the plate discharging unit 7.
7 is discharged.

[0003] However, the conventional stencil printing machine shown in FIG.
Since the stencil master 70 is transported to the printing unit 75 and cut by the cutter mechanism 73 to supply one stencil master 70, the transport mechanism 74 becomes complicated and causes troubles such as poor transport. Had become. In addition, it is necessary to attach and hold the stencil master 70 after conveyance to the peripheral wall portion 76a of the plate cylinder 76, and a mechanism necessary for these operations must be installed, so that there is a disadvantage that the entire apparatus becomes large. Was.

In order to solve these disadvantages, Japanese Patent Laid-Open Publication No. Hei.
In Japanese Patent No. 73987, a stencil printing / printing apparatus is provided in which a stencil master supply / discharge unit and a plate making unit are provided on the outer periphery of a peripheral wall of a plate cylinder, and stencil making, printing, printing and discharging are performed without cutting the stencil master. Proposed. FIG. 7 is a side sectional view of the stencil printing machine. This device uses a plate cylinder 80
The plate supply / discharge unit 81 is provided in the vicinity of the peripheral wall portion 80a, and the plate supply / discharge unit 81 can rotate relatively to the peripheral wall portion 80a of the plate cylinder 80. The plate supply / discharge unit 81 has a master supply unit 83 for winding and accommodating a stencil master 82, a platen roller 84, a thermal head 85, and a plate discharge winding unit 86 for winding up a used master. A part 80 of the peripheral wall 80a of the plate cylinder 80
b is configured to be permeable to ink,
The ink supplied from 7 is supplied from there to printing paper (not shown).

On the other hand, conventionally, a stencil master generally used is a thick stencil in which a thermoplastic resin film such as polyester is adhered to a porous support using an adhesive. The use of a stencil master using a very thin porous support having a thickness of about 3 to 10 μm or a stencil master substantially consisting of only a thermoplastic resin film (thickness of about 6 μm to 13 μm) has been proposed. Has the advantages not found in the stencil master having the above thick support (Japanese Patent Laid-Open No. 3-24059).
6, JP-A-4-7198, JP-A-3-99890, etc.).

However, when a stencil master having a very thin support is used in the apparatus shown in FIG. 7, the mechanical strength of the stencil master is low. Sometimes it was necessary to reconnect to the winding shaft. Further, when a stencil master having a very thin support was used in the apparatus as shown in FIG. 6, since the stencil masters had no rigidity, poor conveyance (conveying jam, winding around a conveying roll) was likely to occur. Such a tendency was more remarkable when the stencil master substantially consisting of only the thermoplastic resin film was used.

The present invention has been made in view of the above-mentioned circumstances of the prior art, and has a support having a very thin or no support, a thickness of 0.5 μm.
It is an object of the present invention to provide a method for mounting a stencil master having a size of about m to 20 μm on a plate cylinder without causing the above-mentioned problems.

[0008]

According to the present invention, there is provided a plate cylinder partially formed on an ink-permeable peripheral wall and having a stencil master wound around the outer periphery thereof, and an ink supply means. And a plate feeding / discharging unit disposed close to the outer periphery of the peripheral wall of the plate cylinder and inside the rotation system of the plate cylinder, and capable of rotating relatively to the peripheral wall of the plate cylinder, The plate feeding / discharging unit has at least a master supply unit for winding and accommodating a stencil master in a roll shape, and a plate discharging / winding unit for winding and accommodating a used master.
Crimping the platen roller through the stencil master
The perforating means for perforating the star by heat is provided outside the rotating system of the plate cylinder.
And the perforation means is provided with the platen roller.
After the forward position, which is the pressing position of the plate, and outside the rotation system of the plate cylinder.
Is configured to be movable between the retracted position, or
During plate making, press the platen roller via the stencil master.
A perforating means for thermally perforating the stencil master is provided on the stencil master.
A platen roller fixedly arranged outside the rotating system, and
Is an advanced position, which is a pressing position with the perforation means, and the rotation of the plate cylinder.
It is configured to be movable between the inside of the rolling system and the retracted position.
The platen via the stencil master
Perforating the stencil master by pressing against the roller
Means are arranged outside the rotation system of the plate cylinder, and
An advanced position in which the step is a pressing position with the platen roller;
It is configured to be movable between a retracted position outside the rotation system of the plate cylinder.
While the platen roller is in contact with the piercing means.
The forward position, which is the pressing position, and the retraction inside the rotation system of the plate cylinder
Stencil printing machine configured to be movable between
When the stencil master is wound around the plate cylinder,
Place the tip of the star and the roll
After that, the stencil master arranged inside the rotation system of the plate cylinder
And a roll-shaped portion disposed outside the rotation system of the plate cylinder
The stencil master is mounted on the cylinder while the
A method of mounting a stencil master characterized by being worn is provided.

[0010]

The method of the present invention will be described below in detail. The present invention provides a plate cylinder partially formed on an ink-permeable peripheral wall and having a stencil master wound around the outer periphery, an ink supply means, and a plate cylinder proximate to the outer periphery of the peripheral wall portion of the plate cylinder. Inside the rotating system
(The position where the rotation of the plate cylinder interferes with the structure on the plate cylinder
And a plate supply / discharge unit that is rotatable relative to the peripheral wall portion of the plate cylinder.
At least, in a stencil printing machine having a stencil master having a stencil master wound in a roll and accommodating a stencil master and a stencil take-up unit for winding and accommodating a used master, a method of winding the stencil master on a plate cylinder is provided. In such a method, after the leading end of the stencil master, that is, one end of the outermost periphery, and the roll-shaped portion are arranged in close proximity to each other, the stencil master is stenciled while relatively separating the leading end of the stencil master from the roll-shaped portion. It is characterized by being wound around the body.

Here, the state in which the leading end of the stencil master and the roll-shaped portion are relatively separated means that the leading end of the stencil master is fixed to the plate discharge winding portion on the plate cylinder, and the roll-shaped portion is the peripheral wall of the plate cylinder. (The plate cylinder may be fixed and the roll-shaped part may rotate along the peripheral wall of the plate cylinder, or the roll-shaped part may be fixed outside the plate cylinder rotation system and the entire plate cylinder may be rotated. ) The stencil master may be wound, or conversely, the roll-shaped portion is fixed to the master supply section, and the leading end of the stencil master is separated along the peripheral wall of the stencil master. The tip of the stencil master may rotate along the peripheral wall of the plate cylinder, or the tip of the stencil master may be out of the rotation system of the plate cylinder (a position that does not interfere with components on the plate cylinder even if the plate cylinder rotates). The plate cylinder may be rotated and the plate cylinder is rotated, but only the peripheral wall of the plate cylinder is fixed to the tip of the stencil master. Does not rotate relative to the part.) It may be wound.

The ink supply means includes an ink container, an ink supply pump, an ink supply pipe, an ink squeegee roller or a blade, an ink doctor roller, and the like, and any known means can be used. In addition, the functions may be distributed and installed at a plurality of locations at these locations, or the location can be arbitrarily selected from the side plate of the plate cylinder, the inside of the plate cylinder, or a place other than the plate cylinder.

A metal mesh, a chemical fiber mesh, or a plate obtained by plating them can be used as a constituent member in the peripheral wall of the plate cylinder, and a known structure can be used.

Although the method of the present invention exhibits an advantage even for a stencil master having the above-mentioned very thin support, it has a remarkable effect particularly for a stencil master substantially composed of only a thermoplastic resin film. Hereinafter, a stencil master substantially composed of only a thermoplastic resin film will be described.

The thermoplastic resin film used as the stencil master may be a general thermoplastic resin film formed by an extrusion method, a casting method or the like, and may be polyethylene terephthalate, polyethylene-2,6-naphthalate, polyethylene Polyesters such as α, β-bis (2-chlorophenoxy) ethane-4,4-dicarboxylate and polycarbonate; polyolefins such as polyethylene, polypropylene, ethylene-vinyl acetate copolymer, polybutadiene, polystyrene and polymethylpentene , Polyhexamethylene adipate (nylon 6
6), polyamides such as poly ε-caprolactam (nylon 6) and nylon 610; halogenated polymer systems such as polyvinylidene chloride, polyvinylidene fluoride and polyvinyl fluoride; vinyl polymer systems such as polyacrylonitrile and polyvinyl alcohol; polyacetals; Examples thereof include polyether sulfone, polyether ketone, polyphenylene ether, polysulfone, polyphenylene sulfide, and copolymers and mixtures thereof. Preferably, a film having a high perforation sensitivity is effective, and for this purpose, a film in which the thermoplastic resin in the state of constituting the film ranges from a substantially amorphous level to a crystallinity of 15%. Good. More preferably, the film is at a substantially amorphous level. Here, the film having a substantially amorphous level is a film whose raw material has almost no melting point by the DSC method, or a film whose crystallization is suppressed by a processing method (a quenching method or the like). Film. The crystallinity can be determined by the X-ray method, but may also be determined by the DSC method based on the area ratio of the melting energy.

The film is more preferably based on a copolyester and the film is of a substantially amorphous level. Most preferably, the copolymerized polyester as a raw material is substantially amorphous. Here, the substantially amorphous polyester is different from a so-called high-crystalline polyethylene terephthalate-based resin which generally has a crystalline melting point (according to the DSC method) of 245 to 260 ° C.
First, one kind of a polymer or a blend of two or more kinds of polymers as a raw material is sufficiently annealed to be in an equilibrium state, the crystallinity is fixed by an X-ray method, and the crystallization is measured using this sample as a standard. The melting point is 10% or less, preferably 5% or less, and more preferably, almost no melting point is observed even by the DSC method. By using such a low-crystal-type thermoplastic film, thermal opening can be sufficiently performed even when the energy applied to the thermal head is very small.

The thickness of the thermoplastic resin film is preferably 0.5 to 20 μm, more preferably 1 to 10 μm. The melting start temperature is 50 to 300 ° C, preferably 70 to 290 ° C.

As a method of performing a heat fusion preventing treatment on the side of the thermoplastic resin film which is in contact with the thermal head, there are known a metal salt of a fatty acid, a phosphate ester type surfactant, a fluid lubricant such as silicone oil, a perfluoro resin, and the like. A method of uniformly applying a thermal fusion inhibitor such as a fluorine compound having an alkyl group is exemplified. The coating amount is 0.001-2 g /
m ² , preferably 0.005 to 1 g / m ² .

As a method of imparting an antistatic effect to such a thermoplastic resin film, a method of uniformly applying an antistatic agent to the thermoplastic resin film (of course, it is also possible to apply the mixture after mixing with a heat fusion preventing treatment agent. Yes) or in a thermoplastic resin film.

In the former method of applying an antistatic agent to a thermoplastic resin film, examples of the antistatic agent used include a metal salt of an organic sulfonic acid or a polyalkylene oxide, an ester, an amine, a polyethoxy derivative, a carboxylate, and an aminganidinium salt. And general antistatic agents such as quaternary ammonium salts and alkyl phosphate esters. The application amount of the antistatic agent is 0.001 to 2.0 g
/ m ² , preferably 0.01 to 0.5 g / m ² .

As the antistatic agent used in the latter method of incorporating an antistatic agent into a thermoplastic resin film, one or more of metal salts of organic sulfonic acids, polylene oxide, and quaternary ammonium salts are used. And the like.

The metal organic sulfonic acid salt has the formula RSO ₃ X
Wherein R is an aliphatic group, an alicyclic group, or an aromatic group, and X is a metal such as Na, K, and Li. ,
Examples thereof include alkyl benzene sulfonic acid metal salts. Examples of the alkyl include octyl, decyl, dodecyl (lauryl), tetradecyl (myristyl), hexadecyl, octadecyl (stearyl) and the like.
Further specific compounds include sodium lauryl sulfonate, potassium lauryl sulfonate, lithium lauryl sulfonate, sodium stearyl sulfonate, potassium stearyl sulfonate, lithium stearyl sulfonate, sodium dodecylbenzene sulfonate, potassium dodecylbenzene sulfonate, Examples thereof include lithium dodecylbenzenesulfonate. On the other hand, the content of the organic sulfonic acid metal salt in the thermoplastic resin film is 0.1%.
It is 1 to 2% by weight, preferably 0.2 to 1.5% by weight. When the amount of the organic sulfonic acid metal salt is less than 0.1% by weight, the antistatic effect is small. On the other hand, when the amount exceeds 2% by weight, the film surface is undesirably roughened. In addition, the content of the organic sulfonic acid metal salt in the thermoplastic resin film is 0.1 to 2% by weight, preferably 0.2 to 1.5% by weight. 0.1% by weight of organic metal sulfonate
When the amount is less than the above, the antistatic effect is small. On the other hand, when the amount exceeds 2% by weight, the surface of the thermoporous sheet is roughened, which is not preferable.

As the porylene oxide contained in the thermoplastic resin film, polyethylene oxide,
Examples thereof include polypropylene oxide, polyethylene-propylene oxide copolymer, and polytetramethylene oxide, and have a molecular weight of 400 to 500,000, more preferably 1 to 500,000.
000-50,000. The content of the polyalkylene oxide is 0.1 to 5% by weight based on the thermoplastic resin film,
Preferably it is 0.2 to 4% by weight. When the amount of the porylene oxide is less than 0.1% by weight, the antistatic property decreases, while when it exceeds 5% by weight, the mechanical properties of the film deteriorate, which is not preferable.

The conductive agent to be contained in the thermoplastic resin film is represented by the formula [(RN (CH ₃ ) ₂ -R ′] X (where R is an alkyl group having 12 to 18 carbon atoms, and R ′ is X represents CI or an alkyl group or methyl group having 12 to 18 carbon atoms;
Alternatively, one or a mixture of two or more quaternary ammonium salts represented by Br) is used. The content of the ammonium salt is 1 to 50% by weight, more preferably 2 to 30% by weight, based on the thermoplastic resin film.

FIG. 1 is a side sectional view showing a main part of a stencil printing machine to which the method of the present invention is applied, and FIG. 2 is a transverse sectional view of the same. As shown in the figure, the plate cylinder 1 has a hollow cylindrical shape, and side plates 2 and 3 are formed at both ends. One side plate 2
Is supported on a fixed shaft 4 passing through the plate cylinder 1 via a clutch 5 and a drive shaft 6 from a motor (not shown), and the other side plate 3 is supported on the shaft 4 via a clutch 7. It is a structure that is performed. Therefore, by releasing the clutches 5 and 7, the side plates 2 and 3 and the peripheral wall 8 of the plate cylinder 1 can be individually rotated. Further, a portion corresponding to the printing surface of the peripheral wall portion 8 of the plate cylinder 1 is an ink-permeable peripheral wall portion 9.
Is formed. Further, an ink supply unit 10 fixed to the shaft 4 is provided in a hollow portion of the plate cylinder 1. The ink supply unit 10 includes an ink distributor 11 and an ink roller unit 12.

A plate feeding / discharging unit 20 is supported on the side plates 2 and 3 and is arranged so as to be close to the outer periphery of the peripheral wall 8 of the plate cylinder 1 and inside the rotation system of the plate cylinder 1. The plate supply / discharge unit 20 has a master supply unit 22 for winding and accommodating a stencil master 21, a platen roller 23, and a plate discharge winding unit 24 for winding a used master, and these are installed in parallel with the plate cylinder 1. I have. The platen roller 23 and the plate discharging take-up unit 24 are driven to rotate by a motor 25 via a pulley 26. A drive signal to the motor 25 is supplied by connecting a signal line 28 to a connector 27 provided on the side plate 2. Connection and disconnection of the signal line 28 to and from the connector 27 can be performed by well-known mechanical or electrical means. This connector 27 can also serve as a fixing means for the side plate 2.

As shown in FIG. 3, the thermal head 30 serving as a punching means is mounted at a position where the rotation of the plate cylinder 1 is not hindered and can be opposed to the platen roller 23. The thermal head 30 includes a cam (not shown),
A mechanism such as a solenoid and a crank can move between a position that does not hinder rotation of the plate cylinder 1 (retracted position) and a position that is pressed against the platen roller 23 (advance position). The stencil master 21 can be pressed against the platen roller 23 via the stencil master 21.

In the example of FIG. 3, the thermal head 30 is configured to be movable. However, as shown in FIG. 4, the platen roller 23 is moved to the retracted position inside the rotation system of the plate cylinder 1 and the rotation of the plate cylinder 1 is stopped. Thermal head 30 fixedly arranged outside the system
May be movable between an advanced position, which is a crimping position, and the position.

Further, both the thermal head 30 and the platen roller 23 can be configured to be movable.
That is, the thermal head 30 is disposed outside the rotation system of the plate cylinder 1, and the thermal head 30 is placed on the platen roller 23.
The platen roller 23 is configured to be movable between a forward position, which is a pressing position of the plate cylinder, and a retracted position outside the rotation system of the plate cylinder 1, and the forward position, which is a pressing position of the platen roller 23 with the thermal head 30, and the plate cylinder 1. May be configured to be movable between a retreat position inside the rotary system.

As a means for detecting the end position of the stencil master 21 in an arbitrary plate making operation, an end mark detecting device (not shown) using known optical means is installed at a position where the rotation of the plate cylinder 1 is not hindered. It is possible to move according to.

Next, an example of a stencil master mounting method according to the present invention will be described with reference to FIG. 5, but the present invention is not limited to this. The tip of the stencil master 21 pulled out from the roll-shaped portion 21 'around which the stencil master 21 is wound is fixed to the plate discharging take-up portion 25, and the roll-shaped portion 21' is fixed outside the rotation system of the plate cylinder 1 (FIG. (A)). At this time, the roll-shaped portion 21 'is set to be rotatable about its winding axis. Next, the plate cylinder 1 is connected to the drive shaft 4.
And the stencil master 21 is wound around the plate cylinder peripheral wall portion 8 ((B) and (C) in FIG. 5). Master supply unit 2
After rotating the plate cylinder 1 until the roller 2 reaches a predetermined position near the roll-shaped portion 21 ', the rotation is stopped. After the rotation stops,
The fixing of the roll-shaped portion 21 'is released, and the master supply portion 22 is released.
(FIG. 5D). Thus, the mounting of the stencil master is completed.

The above-described series of operations may be performed by operating a switch for controlling the rotation of the plate cylinder 1 at the discretion of a person, or information from a position sensor (not shown) installed in the plate cylinder 1 in advance. , The rotation of the plate cylinder 1 may be automatically controlled and performed. further,
The setting of the stencil master 21 in the master supply unit 22 can be automated using well-known means.

Next, the operation at the time of the initial master set and the detailed structure related thereto will be described. 8, the master roll 21 'and the plate discharging take-up shaft 25 are supplied in a pair, for example, as shown in FIG. Also,
The operator may perform an operation of fixing the leading end of the master 21 pulled out from the master roll 21 'to the plate discharge winding shaft 25 provided between the side plates 2 and 3 in advance. At this time, the master roll 21 ′ is attached to the main body side plate 50 (FIG. 1).
1) is set in a groove 52a formed in an arm 52 swingably supported by a shaft 51 fixed to 1), while the plate discharging take-up shaft 25 is rotatable together with the printing drum.
Is inserted into the groove 2a provided in the groove.

When the "master set button" (not shown) is depressed after the setting, the cylindrical plate cylinder 8 constituting the printing drum slowly starts rotating in the direction of the arrow in FIG. At this time, since the side plate 2 of the printing drum also rotates together with the cylindrical plate cylinder 8, the platen roller 23 rotatably provided between the side plates 2 and 3 and the plate discharge take-up shaft 25 also move to move the master roll. Master 2 from 21 '
1 is pulled out and wound little by little around the outer periphery of the cylindrical plate cylinder 8. The master roll 21 ′ is provided with a braking force at its shaft end by a brake piece 53 as shown in FIG. 11 and is set on the arm 52. So that it can be wrapped tightly around

Further, when the cylindrical plate cylinder 8 and the side plate 2 of the printing drum rotate together, the master 21 is wound around the cylindrical plate cylinder 8 by substantially one turn, as shown in FIG.
At this time, the platen roller 23 is configured to partially push up the master 21. Here, the rotation of the cylindrical plate cylinder 8 stops, and then the solenoid 54 operates, and the arm 52
It swings in the direction of the arrow in FIG. Then Master Roll 2
The shaft end of 1 ′ is disengaged from the groove 52a of the arm 52 and the side plate 2
Into the groove 2b. Even when the master roll 21 'is inserted into the groove 2b, a brake resistance is similarly applied in the rotation direction. Thus, the initial setting of the master roll is completed as shown in FIG.

Next, the plate making operation will be described. In FIG. 13, a cam 55 is rotated by a motor (not shown), and an arm 57 held in a dotted state in the figure is moved to a solid state by the force of a spring 58 via a cam follower 56. The heat generating portion 30 swings about a shaft 59 which is pressed by the force of a spring 58. Next, the platen roller 23 slowly rotates in the direction of the arrow in the figure, and in synchronization with this, the cylindrical plate cylinder 8 also slowly rotates in the direction of the arrow in the figure. However, at this time, the side plate 2 of the printing drum is fixed to the main body side plate 50 by a device (not shown) and does not rotate. Then, the thermal head heating element selectively generates heat based on the image information of the document, and performs the perforated plate making on the master 21.

On the other hand, at the same time, the plate discharging take-up shaft 25 also rotates in the direction of the arrow in the figure, so that the master 21 that has been wound around the outer periphery of the cylindrical plate cylinder 8 is wound up by the plate discharging take-up shaft 25. Became a new master 2
1 is wound around the outer periphery of the cylindrical plate cylinder 8, and plate making and plate feeding are completed.

FIG. 14 shows a portion for transmitting the rotational driving force of the platen roller 23. The gear 60 at the shaft end of the platen roller 23 is adapted to mesh with a gear 62 fixed to a motor 61, and the arm 6 to which the motor 61 is fixed.
3 is engaged by the operation of the solenoid 64 fixed to the main body side plate 50. That is, the gears are engaged during plate making and supply, and are released during printing.

The driving force of the plate discharge take-up shaft 25 is transmitted in the same manner, and the driving source of the platen roller 23 and the plate discharge take-up shaft 25 is released at the time of printing. And the inertia is prevented from increasing.

In the printing step, the cylindrical plate cylinder 8 and the printing drum side plate 2 rotate integrally, and the paper fed thereto is pressed by a press roller 65 (FIG. 8) to form an image.

When the stencil master 21 is made, the plate supply / discharge unit 20 is stopped at a fixed position (upper position), and the platen roller 23 is moved to 23 'as shown in FIG. 3 or FIG.
And the thermal head 30 is pressed against the thermal head 30, or the thermal head 30 is moved to the position 31 'and pressed against the platen roller 23, or both are moved and pressed. When the plate discharging take-up unit 25 rotates in the direction A in FIG. 1, the peripheral wall 8 of the plate cylinder 1 also
The stencil master 21 that has been rotated in the direction and has been stuck to the peripheral wall portion 8 is taken up by the stencil discharge take-up section 25 as a used master. At this time, a new stencil master 21 that has not been drilled at the same time
Are sequentially supplied from the master supply unit 22 and the peripheral wall portion 8 rotates, and when the peripheral wall portion 8 rotates to a predetermined position, an image signal is supplied to the thermal head 30, and a new stencil master 21 is punched while the plate cylinder 1 is being punched. Is attached to the peripheral wall portion 8. When the plate cylinder 1 comes to a predetermined position, the thermal head 30
Is stopped, and the thermal head 30 or the platen roller 23 moves to the original position. Then
When the peripheral wall portion 8 of the plate cylinder 1 reaches a predetermined position, the peripheral wall portion 8 and the plate discharge winding portion 22 stop driving, and the plate making is completed. continue,
The plate supply / discharge unit 20 rotates together with the plate cylinder 1 and can perform rotary printing on printing paper.

Actually, as a stencil master, a thermally non-crystalline (1% crystallinity) thermoplastic resin film having a thickness of 2.0 μm mainly composed of copolymerized polyester is placed on the side in contact with the thermal head. Acrylic silicone (US-270; Toa Gosei Chemical) as an anti-fusing agent and ammonium salt dodecyltrimetal ammonium chloride [C ₁₂ H ₂₅ N (CH ₃ ) ₂ CH ₃ Cl] as an antistatic agent in a ratio of 1: 1.
Using a material coated to a dry weight of 0.1 g / m ² in the ratio of above, and mounted on the plate cylinder by the above method, the stencil master was easily prepared without any troubles as seen in the prior art. I was able to attach it.

[0043]

According to the method of mounting the stencil master of the present invention, not only the manual winding of the stencil master on the integrated plate cylinder by hand, but also the automation of the winding can be easily achieved. The method of the present invention is very effective when a stencil master having a very thin support, particularly a stencil master consisting essentially of a thermoplastic resin film, is used.

[Brief description of the drawings]

FIG. 1 is a sectional view of a plate cylinder of a stencil printing machine having an integrated plate cylinder to which the present invention is applied.

FIG. 2 is a side sectional view of the apparatus of FIG. 1;

FIG. 3 is a cross-sectional view of an example of an apparatus having a plate making unit outside a rotation system of a plate cylinder.

FIG. 4 is a cross-sectional view of an example of an apparatus having a plate making unit outside a rotation system of a plate cylinder.

FIG. 5 is an explanatory diagram of an example of a method of mounting a stencil master according to the present invention.

FIG. 6 is a diagram showing a schematic configuration of a conventional stencil printing apparatus in which a stencil making unit and a printing unit are integrated.

FIG. 7 is a side sectional view showing a main part of a conventional stencil printing machine in which a plate supply / discharge unit is integrated with a plate cylinder.

FIG. 8 is an explanatory diagram of an operation and a detailed structure at the time of an initial master set.

FIG. 9 is a diagram showing a master roll and a plate discharging take-up shaft in a paired state.

FIG. 10 is a diagram showing a state in the middle of a master set.

FIG. 11 is a view showing the structure near the shaft end of the master roll.

FIG. 12 is a view showing a state in which the master is wound around the cylindrical plate cylinder by substantially one turn.

FIG. 13 is an explanatory diagram of an initial master set completion state and a plate making operation.

FIG. 14 is a diagram illustrating a rotation driving force transmission unit of a platen roller.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 plate cylinder 2, 3 side plate 4 shaft 5, 7 clutch 6 drive shaft 8 peripheral wall portion 9 ink permeable peripheral wall portion 20 plate supply / discharge unit 21 stencil master 22 master supply portion 23 platen roller 21 ′ roll-shaped portion 24 plate discharge take-up portion 30 Thermal head

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-62-73987 (JP, A) (58) Field surveyed (Int. Cl. ⁷ , DB name) B41L 13/00-13/14

Claims (1)

(57) [Claims] 1. A part is formed on an ink-permeable peripheral wall,
A plate cylinder around which a stencil master is wound, an ink supply means, and a plate cylinder disposed near the outer periphery of the peripheral wall portion of the plate cylinder and inside the rotation system of the plate cylinder; comprising a stencil feed unit which can rotate relatively against, fed-plate discharge unit includes at least a master supply unit that accommodates by winding a stencil master in a roll, plate discharging accommodating taking up the used master It has a winding section and (a) a hole at the time of plate making.
Crimping the platen roller through the stencil master
The perforating means for perforating the star by heat is provided outside the rotating system of the plate cylinder.
And the perforation means is provided with the platen roller.
After the forward position, which is the pressing position of the plate, and outside the rotation system of the plate cylinder.
Is configured to be movable between the retracted position and (b)
Crimping to the platen roller via stencil master during stencil printing
The perforating means for thermally perforating the perforated stencil master is provided by rotating the perforated cylinder.
Fixed outside the rolling system, and the platen roller
Advancement position, which is a pressing position with the perforation means, and rotation of the plate cylinder
It is configured to be movable between the inside of the system and the retracted position
Or (c) the press through a stencil master during plate making.
Performs thermal perforation on the stencil master by pressing against a Latin roller
A piercing means is arranged outside the rotation system of the plate cylinder, and
Advancing position in which the hole means is a pressing position with the platen roller;
Movable between the rest position and the retracted position outside the rotating system of the plate cylinder
And the platen roller is provided with the perforating means.
Between the forward position, which is the pressing position of the plate cylinder, and the rotation system of the plate cylinder.
A stencil making mark configured to be movable between the retracted position and the retracted position.
Printing machine, the stencil master being wound around a plate cylinder,
Place the leading edge of the plate master and the roll
After being placed, the stencil mass arranged inside the rotation system of the plate cylinder
Roll arranged outside the rotating system of the plate cylinder
The stencil master with the stencil cylinder
A stencil master mounting method characterized by being mounted on a stencil master.