JP2005283948A - Platemaking machine - Google Patents

Platemaking machine Download PDF

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Publication number
JP2005283948A
JP2005283948A JP2004097396A JP2004097396A JP2005283948A JP 2005283948 A JP2005283948 A JP 2005283948A JP 2004097396 A JP2004097396 A JP 2004097396A JP 2004097396 A JP2004097396 A JP 2004097396A JP 2005283948 A JP2005283948 A JP 2005283948A
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JP
Japan
Prior art keywords
master sheet
sheet
blade
photosensitive layer
rotary moving
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Pending
Application number
JP2004097396A
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Japanese (ja)
Inventor
Atsushi Hiradate
淳 平館
Tomonori Terai
智紀 寺井
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Iwatsu Electric Co Ltd
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Iwatsu Electric Co Ltd
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Filing date
Publication date
Application filed by Iwatsu Electric Co Ltd filed Critical Iwatsu Electric Co Ltd
Priority to JP2004097396A priority Critical patent/JP2005283948A/en
Publication of JP2005283948A publication Critical patent/JP2005283948A/en
Pending legal-status Critical Current

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Abstract

<P>PROBLEM TO BE SOLVED: To obtain a structure capable of reliably cutting an excess lead end x1 of a master sheet X without damaging a photosensitive layer c which is mechanically fragile. <P>SOLUTION: The platemaking machine has a function of cutting the lead end x1 of a roll type master sheet X attached to a paper feed unit into a required length by using a rotary movable blade 7 which can move along a fixed blade 6. In the machine, while the fixed blade 6 is positioned in the surface photosensitive layer c side of the master sheet X, the master sheet X is cut by the movement of the rotary movable blade 7 positioned in a film base side as the back face side of the master sheet X. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は印刷用原版マスターを製作する製版機に関し、特に、ロール状マスターシートの給紙部の改良に関する。   The present invention relates to a plate making machine for producing an original master for printing, and more particularly to an improvement of a paper feeding unit for a roll-shaped master sheet.

周知のように、多くの製版機においては、種々のサイズのマスターを得るため、ロール状マスターシートを用いるが、このようなロール状マスターシートを製版機の給紙部に装填する場合、ロール状マスターシートからの引出端部をカッターで切除する必要がある。   As is well known, in many plate making machines, a roll-shaped master sheet is used in order to obtain masters of various sizes. However, when such a roll-shaped master sheet is loaded in the paper feeding unit of the plate-making machine, a roll-shaped master sheet is used. It is necessary to cut out the drawing end portion from the master sheet with a cutter.

従来の給紙部においては、マスターシートの引出端部をカットするため、固定刃とこの固定刃に沿って移動できる回転移動刃とを備えたカッターが用いられ、引出端部を充分に引き出した後、手動で回転移動刃を往復動させてマスターシートの余長部分を切除している。
特許3395568号公報
In a conventional paper feeding unit, a cutter having a fixed blade and a rotary moving blade that can move along the fixed blade is used to cut the drawing end portion of the master sheet, and the drawing end portion is sufficiently pulled out. Thereafter, the extra length portion of the master sheet is cut off by manually reciprocating the rotary moving blade.
Japanese Patent No. 3395568

ところで、ロール状マスターシートは樹脂ウエブやペーパ・ベースの表面に感光層を積層した構造であるが、この感光層は機械的に非常に崩れやすい性質をもっているので、表面側に位置された回転移動刃を手で移動させると、切断部から剥離しやすい感光層の一部が脱落し、脱落片が後続のマスターシートの表面に付着して画像品質が著しく低下してしまう。
本発明の目的は、以上に述べたような従来のロール状マスターシートの問題に鑑み、機械的に脆弱な感光層を損傷することなく、マスターシートの余長引出端部を確実に切除できる構造を得るにある。
By the way, the roll-shaped master sheet has a structure in which a photosensitive layer is laminated on the surface of a resin web or paper base, but this photosensitive layer has a property that it is very easily broken mechanically. When the blade is moved by hand, a part of the photosensitive layer that is easily peeled off from the cut portion falls off, and the dropped pieces adhere to the surface of the subsequent master sheet, so that the image quality is remarkably deteriorated.
In view of the problems of the conventional roll-shaped master sheet as described above, the object of the present invention is a structure that can reliably cut off the extra length drawing end of the master sheet without damaging the mechanically fragile photosensitive layer. To get to.

この目的を達成するため、本発明は、給紙部に取り付けたロール状マスターシートの引出端部を固定刃に沿って移動できる回転移動刃により必要な長さにカットする製版機において、マスターシートの表面感光層側に前記固定刃を位置し、マスターシートの裏面側であるフイルムベース側に位置した前記回転移動刃の移動によりマスターシートをカットすることを提案する。
後述する本発明の好ましい実施例の説明においては、前記回転移動刃はロール状マスターシートを装填される給紙部ドアの閉鎖を感知するスイッチにより往復動される構成が説明される。
In order to achieve this object, the present invention provides a master sheet in a plate making machine that cuts a drawing end of a roll-shaped master sheet attached to a sheet feeding unit to a required length by a rotary moving blade that can move along a fixed blade. It is proposed that the fixed blade is positioned on the surface photosensitive layer side and the master sheet is cut by the movement of the rotary moving blade positioned on the film base side which is the back surface side of the master sheet.
In the following description of the preferred embodiment of the present invention, a configuration is described in which the rotary moving blade is reciprocated by a switch that senses the closing of a sheet feeding unit door loaded with a roll-shaped master sheet.

本発明によれば、マスターシートの表面感光層側に前記固定刃を位置し、マスターシートの裏面側であるフイルムベース側に位置した前記回転移動刃の移動によりマスターシートをカットするので、機械的に脆弱な感光層に直接に固定刃が当てがわれた状態で裏面側から回転移動刃の切断圧を受けることになるので、感光層が曲げられてクラック状態になり、破砕するのを防止できる。
また、回転移動刃を給紙部ドアのスイッチの信号で往復動させる場合にあっては、給紙部ドアの閉鎖だけで自動カットを行うことができる。
According to the present invention, the fixed sheet is positioned on the surface photosensitive layer side of the master sheet, and the master sheet is cut by the movement of the rotary moving blade positioned on the film base side, which is the back surface side of the master sheet. Since the cutting pressure of the rotary moving blade is received from the back side while the fixed blade is directly applied to the fragile photosensitive layer, the photosensitive layer is bent and cracked to prevent crushing. .
Further, when the rotary moving blade is reciprocated by the signal of the paper feed unit door switch, automatic cutting can be performed only by closing the paper feed unit door.

以下、図面について本発明の実施例の詳細を説明する。
図1は本発明による製版機の給紙部を示し、同給紙部には給紙部ドア1を仮想線で示す位置に解放することによりロール状マスターシートXを装填できる。
また、給紙部ドア1には同給紙部ドア1の閉鎖状態を感知するドアスイッチ2が付設され、ロール状マスターシートXの装填後の給紙部ドア1の閉鎖時に、後述する回転刃カッター3の回転移動刃7が往復動され、マスターシートXの余長引出端部x1が切除される。
Hereinafter, the details of the embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a sheet feeding unit of a plate making machine according to the present invention, and a roll-shaped master sheet X can be loaded into the sheet feeding unit by releasing a sheet feeding unit door 1 to a position indicated by a virtual line.
The paper feed door 1 is provided with a door switch 2 that senses the closed state of the paper feed door 1 and a rotary blade described later when the paper feed door 1 is closed after the roll-shaped master sheet X is loaded. The rotary moving blade 7 of the cutter 3 is reciprocated, and the extra length drawing end x1 of the master sheet X is cut off.

前記ロール状マスターシートXの引出端部x1を導く給紙パスには、同引出端部x1を繰り出す一対の繰出ローラ4及び図示を省略する帯電器に向かってマスターシートXを供給する一対の供給ローラ4Aが配置されるが、これらの繰出ローラ4と供給ローラ4Aとの間には、図2に拡大して示す回転刃カッター3が設けられ、この回転刃カッター3により給紙パス(図示せず)に引き出されたマスターシートXが必要な長さに切断される。   In the paper feed path for leading the drawing end portion x1 of the roll-shaped master sheet X, a pair of supplies for supplying the master sheet X toward a pair of feeding rollers 4 for feeding out the drawing end portion x1 and a charger (not shown). A roller 4A is disposed, and a rotary blade cutter 3 shown in an enlarged view in FIG. 2 is provided between the feeding roller 4 and the supply roller 4A, and a feed path (not shown) is provided by the rotary blade cutter 3. The master sheet X pulled out is cut to the required length.

即ち、回転刃カッター3の取付板5には給紙パスに隣り合って固定刃6が設けられ、同固定刃6にはマスターシートXの表面側即ち、感光層c側表面が対面された状態におかれる。
また、前記取付板5には逆転可能な駆動モータ8が設けられ、この駆動モータ8は前記ドアスイッチ2が感応したときマイクロコンピュータなどの制御装置により回転移動刃7を1往復動させて、引出端部x1の余長部分を切除できる。
That is, the fixed blade 6 is provided adjacent to the paper feed path on the mounting plate 5 of the rotary blade cutter 3, and the surface of the master sheet X, that is, the surface of the photosensitive layer c is opposed to the fixed blade 6. Smelled.
The mounting plate 5 is provided with a reversible drive motor 8 which is pulled out by reciprocating the rotary moving blade 7 by a control device such as a microcomputer when the door switch 2 is sensitive. The extra length portion of the end portion x1 can be excised.

前記駆動モータ8は駆動ベルト9により図2の紙面と直角な方向、つまり給紙パスの幅方向に回転移動刃7を往復動させ、その往動時に同回転移動刃7と固定刃6との間でマスターシートXをカットできるが、この回転移動刃7はマスターシートXの裏面側から樹脂ベースbに当てがわれることになる。   The drive motor 8 reciprocates the rotary moving blade 7 in the direction perpendicular to the paper surface of FIG. 2, that is, the width direction of the paper feed path, by the drive belt 9. The master sheet X can be cut in between, but the rotary moving blade 7 is applied to the resin base b from the back side of the master sheet X.

図示実施例による製版機の給紙部は、以上のような構造であるから、マスターシートXの余長部分はマスターシートXの樹脂ベースb側から当てがわれて固定刃6との間でカットされる。
この場合、機械的に脆弱な感光層cは、剛性のある固定刃6に接触された状態でカットされるから、無理に折り曲げられて破砕片が生じてマスターシートXの表面に付着し、画像品質の低下を招くのを防止できる。
Since the sheet feeding unit of the plate making machine according to the illustrated embodiment has the above-described structure, the extra length of the master sheet X is applied from the resin base b side of the master sheet X and cut between the fixed blade 6 and the master sheet X. Is done.
In this case, since the mechanically fragile photosensitive layer c is cut while being in contact with the rigid fixed blade 6, the photosensitive layer c is forcibly bent to generate crushed pieces and adheres to the surface of the master sheet X. It can prevent the deterioration of quality.

また、図示実施例のように、ドアスイッチ2を給紙部ドア1に付設する構造にあっては、新たなロール状マスターシートXの装填や交換時に、引出端部x1を繰出ローラ4の位置まで手で引き出し、給紙部ドア1を閉じるだけで、ドアスイッチ2が感応して回転移動刃7が往復動されるため、自動的に引出端部x1の余長部分が切除される利点がある。   Further, in the structure in which the door switch 2 is attached to the sheet feeding unit door 1 as in the illustrated embodiment, when the new roll-shaped master sheet X is loaded or replaced, the drawer end x1 is positioned at the position of the feeding roller 4. By simply pulling out by hand and closing the paper feed unit door 1, the door switch 2 responds and the rotary moving blade 7 is reciprocated, so that the extra length portion of the drawer end x 1 is automatically cut off. is there.

なお、前記実施例の説明においては、樹脂ベースbのマスターシートXを例示したけれども、本発明はペーパベースのマスターシートXであってもよいのは明らかなところである。   In the above description of the embodiment, the resin-based master sheet X is illustrated, but it is obvious that the present invention may be a paper-based master sheet X.

本発明による製版機の給紙部の断面図である。It is sectional drawing of the paper feed part of the plate making machine by this invention. 同給紙部要部の拡大図である。It is an enlarged view of the main part of the paper feeding unit. 用いるマスターペーパの拡大断面図である。It is an expanded sectional view of the master paper to be used.

符号の説明Explanation of symbols

X マスターシート
x1 引出端部
b 樹脂ベース
c 感光層
1 給紙部ドア
2 ドアスイッチ
3 回転刃カッター
6 固定刃
7 回転移動刃
X Master sheet x1 Pull-out end b Resin base c Photosensitive layer 1 Paper feed door 2 Door switch 3 Rotary blade cutter 6 Fixed blade 7 Rotary moving blade

Claims (2)

給紙部に取り付けたロール状マスターシートの引出端部を固定刃6に沿って移動できる回転移動刃7により必要な長さにカットする製版機において、マスターシートの表面感光層側に前記固定刃6を位置し、マスターシートの裏面側であるフイルムベース側に位置した前記回転移動刃7の移動によりマスターシートをカットすることを特徴とする製版機。   In a plate making machine that cuts a drawing end portion of a roll-shaped master sheet attached to a sheet feeding portion to a required length by a rotary moving blade 7 that can move along the fixed blade 6, the fixed blade is disposed on the surface photosensitive layer side of the master sheet. 6. A plate making machine characterized in that the master sheet is cut by the movement of the rotary moving blade 7 located on the side of the film base that is located on the back side of the master sheet. 前記回転移動刃7はロール状マスターシートを装填される給紙部ドア1の閉鎖を感知するスイッチにより往復動されることを特徴とする請求項1記載の製版機。   The plate making machine according to claim 1, wherein the rotary moving blade (7) is reciprocated by a switch for detecting the closing of the paper feeding section door (1) loaded with a roll-shaped master sheet.
JP2004097396A 2004-03-30 2004-03-30 Platemaking machine Pending JP2005283948A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
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Application Number Title Priority Date Filing Date
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6448755A (en) * 1987-08-12 1989-02-23 Canon Kk Recorder
JPH03115047A (en) * 1989-09-28 1991-05-16 Canon Inc Sheet material feeder
JP2001322746A (en) * 2000-05-17 2001-11-20 Iwatsu Electric Co Ltd Master sheet feeding device for plate maker
JP2001322742A (en) * 2000-05-17 2001-11-20 Iwatsu Electric Co Ltd Master sheet feeding device for plate maker

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6448755A (en) * 1987-08-12 1989-02-23 Canon Kk Recorder
JPH03115047A (en) * 1989-09-28 1991-05-16 Canon Inc Sheet material feeder
JP2001322746A (en) * 2000-05-17 2001-11-20 Iwatsu Electric Co Ltd Master sheet feeding device for plate maker
JP2001322742A (en) * 2000-05-17 2001-11-20 Iwatsu Electric Co Ltd Master sheet feeding device for plate maker

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