【発明の詳細な説明】
［産業上の利用分野コ
本発明は印刷機特にオフセット印刷機の版胴に、刷版を
装着するための刷版取付装置に関するものである．
［従来技術］
オフセット印刷機の版胴へ装着される印刷用の刷版とし
ては、一般にアルミ製のＰＳ版（Ｐｒｅｓｅｎｓｉｔｉ
ｚｅｄ Ｐｌａｔｅ ）紙版或いは樹脂版等が知られて
いる．
このうち、ＰＳ版や樹脂版は版の厚さが厚いため多量の
印刷枚数を印刷することができる反面、紙版に比べて高
価であると共に、版胴への着脱も万力によって咬えて版
胴にクランプしなければならず、着脱作業もめんどうで
あった．この為、近年印刷部数が少ない場合には紙版や
、薄手のＰＳ版等が用いられている．従来、この紙版等
の薄手の刷版を使用する場合、第８図及び第９図に示す
如く、版１１ｉ５０の咬え側万力５１の上面に紙版等の
薄手の刷版５２を取付けする版取付プレート５３を設け
、予め版胴５０に装着されたＰＳ版等の通常の厚い版を
台版５４（この台版は使用後不要となった版を用いても
良い）とし、これを支持体としてその周面に台版よりも
薄手の刷版５２を前記版取付プレート５３に引掛けて装
着していた。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a printing plate mounting device for mounting a printing plate on a printing cylinder of a printing press, particularly an offset printing press. [Prior Art] As a printing plate attached to the plate cylinder of an offset printing machine, an aluminum PS plate (presensitivity plate) is generally used.
(Zed Plate) Paper plates, resin plates, etc. are known. Among these, PS plates and resin plates are thicker and can print a large number of sheets, but they are more expensive than paper plates and require a vise to attach and detach the plate from the plate cylinder. It had to be clamped to the body, making attachment and detachment a pain. For this reason, in recent years, paper versions and thin PS plates have been used when the number of copies printed is small. Conventionally, when using a thin printing plate such as this paper plate, as shown in FIGS. 8 and 9, a thin printing plate 52 such as a paper plate is attached to the upper surface of the grip side vise 51 of the plate 11i50. A plate mounting plate 53 is provided, and a normal thick plate such as a PS plate, which has been attached to the plate cylinder 50 in advance, is used as a plate 54 (this plate may be used as a plate that is no longer needed after use). A printing plate 52, which is thinner than the base plate, is hooked onto the plate mounting plate 53 and attached to its peripheral surface as a support.
そして、版胴５０に対して薄手の刷版５２の位置を調整
をする場合は、前記通常の版と同様な厚さを有する台版
５４を移動させ、薄手の刷版５２を台版５４と一体的に
移動させるようになっていた．
［発明が解決しようとする課題］
従来の版取付プレート５３は、紙版或いは薄手のＰＳ版
等の薄手の刷版５２を版胴５ｏに装着する場合、刷版５
２の孔５２′を版取付プレート５３に設けた多数のフッ
ク５３゜に引掛けるようになっているので、版の幅が広
いと引掛け難いと共に、引掛作業中に版が波打ちを起す
と、一旦引掛けたフック５３′から外れることも多く版
の取付け作業に多くの時間を費やしていた．
しかもフック５３′は咬え側万力５１に咬えて固定して
いるため紙版や薄手のＰＳ版を使用しないで通常のＰＳ
版を使用する場合には万力台５５とクランププレート５
６の間の隙間を球面ボルトにより調整する必要があり非
常に繁雑である．
従って、従来の薄手の刷版を用いた小ロフト印刷では、
実際の印刷時間より刷版の交換時間の方が長くなる等、
作業能率を著しく低下させる結果となっている．
本発明は以上のような点に鑑みてなされたものであり、
その目的とするところは、紙版等の薄手の刷版を版胴に
対して迅速、かつ、容易に、しかも、正確に装着するこ
とのできる印刷機の刷版取付装置を提供するものである
．［課題を解決するための手段］
上記目的を達戒するために、本発明における印刷機の刷
版取付装置は、版胴の上面に、刷版の基準孔に嵌入する
版位置決め用突起片と、該突起片を覆うように形成した
版押えプレートとを設け、前記突起片は刷版の巻付け方
向に向って低くなるように傾斜して形戒したことにある
．
［実施例］
以下、本願発明の一実施例を第１図乃至第７図により詳
細に説明する．
図中１は版胴で、該版胴１には、胴の全長にわたって切
欠部２が設けられている．
この版胴１の版固定側３の上面に、紙版或いは厚さ０．
ｌ５關〜０．２４＋ｍ程度のｐｓ版等の薄手の刷版５に
設けた基準孔５ａに対応するように、版位置決め用の係
合突起片６（以下基準ビンと称することとする）を設け
ている．該基準ピン６の頭部６ａは、前記薄手の刷版５
の基準孔５ａとほぼ等しい外径を有しており、版胴１の
長平方向から視て楔状に形戒されている．即ち、該頭部
６ａは刷版５の巻付け方向に向って低くなるように傾斜
して形成されている．尚、本実施例では基準ピン６は、
版胴１の版固定側３に前記切欠部２に沿って、両端部に
夫々３個、計６個設けられているが、該基準ビン６は６
個に限定されることなく適宜数選択して設ければ良いこ
とは言うまでもない．
７は前記薄手の刷版５の版端の浮き上がりを防ぐための
押えプレートで、ほぼへの字状に折り曲げて形戒されて
おり、版胴１の上面に基準ビン６を覆うように一端部を
ボルト８によって固定されている．
即ち、押えプレート７の一辺側は、前記基準ビン６の頭
部６ａの形状（楔形）に略合わせた角度に折曲げられて
おり、かつ、他端部は、薄手の刷版５を挿入しやすいよ
うに上方に折り曲げられている．そして、該押えプレー
ト７の基準ピン６と対向する面には基準ピン６の頭部６
ａより大きい孔９が設けられており、薄手の刷版５の他
端を版胴１と押えプレート７との間に挿入して基準ビン
６と薄手の刷版５の基準孔５ａを嵌合させる場合、前記
押えプレート７に設けた孔９を通して薄手の刷版５の基
準孔５ａと基準ビン６との相対位置を確認しながら基準
ビン６に基準孔５ａを嵌入できるようにしている．
なお、本実施例の基準ビン６は、版胴１に固定した場合
について例示したがこれに限定されることなく、第６図
及び第７図に示す如く、コイルバネ１０或いは板バネ１
１等の弾性体で支持し、版胴１の表面に出没可能として
もよい．また、押えプレート７には孔９を設けているが
、これは基準ビン６を目で確認できるようなものであれ
ばどのような形状をしても良し、押えプレート７を透明
なもの（プラスチック等〉で製作すれば前記孔９は必ず
しも設けなくても良い．
［作用コ
次に、本発明の刷版取付装置による紙版或いは薄手のＰ
Ｓ版等の薄手の刷版の装着動作を説明する．
第３図に示す如く紙版等の薄手の刷版５を、該版５の基
準孔５ａがあいている側の端部を、版胴１の版固定側上
面と押えプレート７の先端下面との間から矢印ａ方向に
差し込み、薄手の刷版５の基準孔５ａを基準ビン６に合
わせ入れる．
その際、基準ビン６の頭部６ａの形状が、刷版５の挿入
側（刷版巻付け方向）に向って薄くなるように楔状に形
成されているので、刷版の挿入はスムーズに行われる．
しかも、押えプレート７に設けた孔９により薄手の刷版
５の基準孔５ａと基準ピン６との相対位置を目で確認し
ながら挿入することができる．
このようにして薄手の刷版５の基準孔５ａが基準ピン６
に挿入されれば、該刷版５を予め、水．油或いは糊等を
全面に塗布したり、又は両面接着テープを貼り付けた版
胴１の表面に沿わせて巻付けるように貼り付け、版胴１
に直接装着される．
そして、紙版等の薄手の刷版５を版胴１から取り外す場
合には、該刷版の版尻を版胴１から外し、該版尻を持っ
て版胴１から遠ざかる方向に引張ってやれば刷版５は基
準ピン６から容易に取外すことができる．
［発明の効果］
以上詳述した如くこの発明によれば、紙版等の薄手の刷
版の端部を版胴と押えプレートとの間に差し込むことに
より、版端部は位置決め用基準ビンの楔形斜面に沿って
移動し、該ビンと刷版に設けた基準孔とは容易、かつ、
正確に嵌合できる．また、薄手の刷版の一端部に設けた
基準孔が基準ピンに挿入されると押えプレートにより押
圧して保持するので、一旦挿入後、刷版が基準ビンから
外れたり、浮き上がることもない等の効果がある．When adjusting the position of the thin printing plate 52 with respect to the plate cylinder 50, the base plate 54 having the same thickness as the normal plate is moved, and the thin printing plate 52 is aligned with the base plate 54. It was designed to be moved in one piece. [Problems to be Solved by the Invention] The conventional plate mounting plate 53 does not support the printing plate 5 when a thin printing plate 52 such as a paper plate or a thin PS plate is attached to the plate cylinder 5o.
Since the hole 52' of No. 2 is designed to be hooked to a large number of hooks 53° provided on the plate mounting plate 53, it is difficult to hook the plate if it is wide, and if the plate becomes wavy during the hooking operation, Once hooked, the plate often came off the hook 53', and a lot of time was wasted installing the plate. Moreover, since the hook 53' is fixed by gripping the grip side vise 51, it can be used as a normal PS plate without using a paper plate or a thin PS plate.
When using a plate, a vise stand 55 and a clamp plate 5 are used.
It is very complicated as it is necessary to adjust the gap between 6 and 6 using spherical bolts. Therefore, in small loft printing using conventional thin printing plates,
The time required to change printing plates is longer than the actual printing time, etc.
This results in a significant decrease in work efficiency. The present invention has been made in view of the above points,
The purpose is to provide a printing plate mounting device for a printing press that can quickly, easily, and accurately mount a thin printing plate such as a paper plate onto a plate cylinder. ．． [Means for Solving the Problems] In order to achieve the above object, the printing plate mounting device of the printing press according to the present invention includes a plate positioning projection piece that fits into the reference hole of the printing plate on the upper surface of the plate cylinder. , a plate holding plate formed to cover the protruding piece is provided, and the protruding piece is inclined in shape so as to become lower in the direction in which the printing plate is wrapped. [Example] Hereinafter, an example of the present invention will be described in detail with reference to FIGS. 1 to 7. In the figure, 1 is a plate cylinder, and the plate cylinder 1 is provided with a notch 2 along the entire length of the cylinder. On the upper surface of the plate fixing side 3 of this plate cylinder 1, there is a paper plate or a plate with a thickness of 0.
An engaging protrusion piece 6 (hereinafter referred to as a reference bottle) for plate positioning is provided so as to correspond to a reference hole 5a provided in a thin printing plate 5 such as a PS plate with a diameter of approximately 0.24 + m. ing. The head 6a of the reference pin 6 is connected to the thin printing plate 5.
It has an outer diameter approximately equal to that of the reference hole 5a, and is wedge-shaped when viewed from the longitudinal direction of the plate cylinder 1. That is, the head 6a is formed to be inclined downward in the winding direction of the printing plate 5. In addition, in this embodiment, the reference pin 6 is
On the plate fixing side 3 of the plate cylinder 1, along the notch 2, there are provided six reference bins, three at each end.
Needless to say, it is not limited to just one item, but can be provided by selecting an appropriate number. Reference numeral 7 denotes a holding plate for preventing the edge of the thin printing plate 5 from lifting up, and is bent into a substantially U-shape. is fixed by bolt 8. That is, one side of the holding plate 7 is bent at an angle that approximately matches the shape (wedge shape) of the head 6a of the reference bottle 6, and the other end is bent into a position where the thin printing plate 5 is inserted. It is folded upward for ease of use. A head 6 of the reference pin 6 is provided on the surface of the holding plate 7 facing the reference pin 6.
A hole 9 larger than a is provided, and the other end of the thin printing plate 5 is inserted between the plate cylinder 1 and the presser plate 7, and the reference hole 5a of the thin printing plate 5 is fitted into the reference bottle 6. In this case, the reference hole 5a can be inserted into the reference bottle 6 while checking the relative position of the reference hole 5a of the thin printing plate 5 and the reference bottle 6 through the hole 9 provided in the holding plate 7. Although the reference bottle 6 of this embodiment is fixed to the plate cylinder 1, the present invention is not limited to this, and as shown in FIGS.
It may be supported by an elastic body such as No. Further, the holding plate 7 is provided with a hole 9, but this hole may have any shape as long as it allows the reference bottle 6 to be visually confirmed. etc.], the hole 9 does not necessarily need to be provided.
We will explain the loading operation of thin printing plates such as S plate. As shown in FIG. 3, hold a thin printing plate 5 such as a paper plate, and connect the end of the plate 5 on the side where the reference hole 5a is open to the upper surface of the plate fixing side of the plate cylinder 1 and the lower surface of the tip of the presser plate 7. Insert the thin printing plate 5 in the direction of the arrow a from between the two, aligning the reference hole 5a of the thin printing plate 5 with the reference bottle 6. At this time, since the shape of the head 6a of the reference bottle 6 is wedge-shaped so that it becomes thinner toward the insertion side of the printing plate 5 (the printing plate wrapping direction), the printing plate can be inserted smoothly. It will happen.
Moreover, the holes 9 provided in the holding plate 7 allow the thin printing plate 5 to be inserted while visually confirming the relative position between the reference hole 5a and the reference pin 6. In this way, the reference hole 5a of the thin printing plate 5 is aligned with the reference pin 6.
When the printing plate 5 is inserted into the water . Apply oil or glue to the entire surface, or apply double-sided adhesive tape so as to wrap it along the surface of the plate cylinder 1.
It is attached directly to the When removing a thin printing plate 5 such as a paper plate from the printing cylinder 1, remove the plate tail of the printing plate from the plate cylinder 1, hold the plate tail and pull it in the direction away from the plate cylinder 1. The printing plate 5 can be easily removed from the reference pin 6. [Effects of the Invention] As detailed above, according to the present invention, by inserting the end of a thin printing plate such as a paper plate between the plate cylinder and the presser plate, the end of the plate is aligned with the positioning reference bin. moving along the wedge-shaped slope, the bottle and the reference hole provided in the printing plate can be easily connected, and
Can be fitted accurately. In addition, when the reference hole provided at one end of the thin printing plate is inserted into the reference pin, it is pressed and held by the holding plate, so once inserted, the printing plate will not come off the reference bin or lift up. There is an effect of
【図面の簡単な説明】[Brief explanation of drawings]
第１図は本発明に係るオフセット印刷機の版胴の平面図
，第２図は第１図の■線の沿う拡大断面図，第３図は第
２図のＡ部拡大図，第４図は押えプレート２２の一部平
面図．第５図は第４図の側断面図．第６図及び第７図は
基準ピンの別実施例図，第８図は従来の紙版取付プレー
トの斜視図，第９図は紙版取付プレートを版胴に装着し
た図である．
ｌ・・・版胴 ２・・・切欠部３・
・・版固定側
５・・・刷版
６・・・基準ビン
７・・・押えプレー
ト
４・・・版尻側
５ａ・・・基準孔Fig. 1 is a plan view of the plate cylinder of an offset printing press according to the present invention, Fig. 2 is an enlarged sectional view taken along the line ■ in Fig. 1, Fig. 3 is an enlarged view of section A in Fig. 2, and Fig. 4 is a partial plan view of the presser plate 22. Figure 5 is a side sectional view of Figure 4. Figures 6 and 7 are diagrams of another embodiment of the reference pin, Figure 8 is a perspective view of a conventional paper plate mounting plate, and Figure 9 is a diagram of the paper plate mounting plate attached to the plate cylinder. l... Plate cylinder 2... Notch part 3.
... Plate fixed side 5 ... Printing plate 6 ... Reference bin 7 ... Presser plate 4 ... Plate bottom side 5a ... Reference hole