JPH11254636A - Sheet-feed perfecting multicolor offset press - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a compact printing machine with a favorable operability by a constitution wherein the respective impression cylinders of two kinds of printing units and the respective impression cylinders of printing units, which occupy before and after an obverse side printing part are directly connected to each other so as to produce respective two-color reverse side printing parts before and after the obverse side printing part. SOLUTION: The printing unit A of each obverse side printing part has an embodiment, in which a plate cylinder 1 contacts with two rubber cylinders 2 vertical upwards and the rubber cylinder 2 contact with an impression cylinder 3 vertically upwards. In a printing unit B, a paper feeding cylinder 7 connects with the impression cylinder 3 vertically upwards. The two rubber cylinders 2 contacting with this impression cylinder 3 and the plate cylinder 1 contacting with these rubber cylinders 2 are arranged operably from the front of a printing machine. In a printing unit C, a paper delivering mechanism 8 is connected with the impression cylinder 3 vertically upwards. The two rubber cylinders 2 contacting with this impression cylinder 3 and the plate cylinder 1 contacting with those rubber cylinders 2 are arranged operably from the rear of the printing machine. The impression cylinders of the these printing units B and C vertically and directly connect with the impression cylinders locating the front and the rear of the obverse side printing part 6. By means of the above-mentioned constitution, the respective two-color reverse side printing parts 9 and 10 are formed before and behind the obverse side printing part 6.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【産業上の利用分野】この発明は、枚葉紙のただ１回の
紙通しによって、枚葉紙の両面に少なくとも各４色刷り
することができる枚葉紙両面多色刷りオフセット印刷機
の構成に係わるものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a two-sided sheet-fed multicolor offset printing press which can print at least four colors on each side of a sheet by a single pass of the sheet. Things.

【０００２】[0002]

【従来技術】枚葉紙の表裏両面に少なくとも各４色の多
色オフセット印刷を施すにあたり、印刷機をただ１回通
すことでこれを行なう両面４色刷りの専用機は、これま
でに各種のものが知られている。その１例に、特開平６
−３３６００３号公報の中で実施例として記載されてい
るものがある。タンデム形式に属するものであって、版
・ゴム・圧の３胴からなる単色刷り印刷ユニットを複数
個用いて両面多色刷りを行なうものが示されている。そ
の実施例中には前記ユニットの圧胴どうしを直接水平に
連接しているものと、また各印刷ユニットの圧胴間に２
個宛中間胴（渡し胴）を介在させて水平に連接している
もの等が示される。詳しくは、その印刷ユニットは版胴
・ゴム胴が圧胴の上方に位置する表面刷り印刷ユニット
と、版胴・ゴム胴が圧胴の下方に位置する裏面刷り印刷
ユニットとして作用するものが交互に前記した如く連接
している。因みに、その圧胴径は版胴・ゴム胴径の２倍
のものと、３胴が同一直径のものとが例示されている。2. Description of the Related Art In order to perform multicolor offset printing of at least four colors on both sides of a sheet of paper, a dedicated machine for two-sided four-color printing, which performs this by passing through a printing machine only once, has been available. It has been known. One example is disclosed in
Japanese Patent Application Laid-Open No. 336003/1991 describes an example. An apparatus belonging to a tandem type and performing double-sided multicolor printing using a plurality of single-color printing units including three cylinders of plate, rubber and pressure is shown. In some embodiments, the impression cylinders of the units are connected directly and horizontally, and two impression cylinders are arranged between the impression cylinders of each printing unit.
One that is connected horizontally with an intermediary cylinder (transfer cylinder) interposed therebetween is shown. Specifically, the printing unit alternates between a front printing unit in which the plate cylinder and blanket cylinder is located above the impression cylinder, and a back printing unit in which the plate cylinder and blanket cylinder is located below the impression cylinder. They are connected as described above. Incidentally, the diameter of the impression cylinder is twice as large as the diameter of the plate cylinder / rubber cylinder, and the diameter of the three cylinders is the same.

【０００３】上記公報記載の両面４色刷りについて使わ
れている全胴数を調べると、圧胴が倍胴使用のもので２
４本、同一直径のものに至っては３０本のものを必要と
している。また枚葉紙搬送時における圧胴間の爪による
くわえ替え数は７回、中間胴を含む場合は更に増え１２
回となっていることが解る。The number of cylinders used for double-sided four-color printing described in the above publication is examined.
Four or thirty pieces of the same diameter are required. In addition, the number of gripping by the claws between the impression cylinders at the time of sheet conveyance is 7 times, and when the intermediate cylinder is included, the number is further increased.
It turns out that it is times.

【０００４】また、上記の胴配列による裏面刷り部は、
圧胴の下方にゴム胴・版胴が位置する構成で裏印刷ユニ
ットが並立し、その間に作業員が入ってメンテナンス、
その他の操作を行なうようになっている。このことは添
付図面における人と機械との対比、明細書の記述から明
らかでその対象印刷紙寸法を勘案すると、それが大であ
ることが読み取れる（例えば四六全判紙７８８ｍｍ×１
０９１ｍｍ、菊全判紙６３６ｍｍ×９３９ｍｍ）。この
胴配列をいま仮に菊半裁判（４６９ｍｍ×６３６ｍｍ）
程度の比較的小さい紙寸法のものの印刷を対象とする印
刷機に実施するとしよう。胴径は必然的に小さいものが
設計上選定されるのが無駄がなく合理的である。必然的
に機械は小型化するが取り扱う作業員の方に変わりはな
い。印刷ユニット間での作業を可能にするためには、大
型機同様になるまで機械の下半部を必要以上に嵩上しな
ければならず（実施例図面のものでさえ基礎面を掘り下
げている）、加えて胴径を小にすれば印刷ユニット間隔
が相当つまるので、特に裏面刷り部は下方にあるので作
業スペースは狭小に過ぎて問題となろう。一口にいつ
て、この胴配列では菊半裁紙程度の紙サイズに印刷する
両面多色刷り機への適用には無理がある。[0004] Also, the back side printing part by the above-mentioned cylinder arrangement is:
The back printing unit is lined up with a blanket cylinder and a plate cylinder located below the impression cylinder, while workers enter during maintenance,
Other operations are performed. This is clear from the comparison between man and machine in the attached drawings and the description in the specification, and it can be read that the size is large when the size of the target printing paper is taken into consideration (for example, 488 mm × 1 sheet of 46-size paper).
091 mm, Kikuzen paper 636 mm x 939 mm). This torso arrangement is now assumed to be a chrysanthemum half trial (469 mm x 636 mm)
Suppose that it is carried out on a printing press intended for printing on relatively small paper dimensions. It is reasonable and efficient to select a small body diameter for design purposes. Inevitably, the machine will be downsized, but the operators who handle it will remain the same. In order to be able to work between printing units, the lower half of the machine must be unnecessarily bulky until it is similar to a large machine (even the ones in the drawings of the embodiment are dug down in the base surface). In addition, if the body diameter is made small, the interval between the printing units becomes considerably dull, so that the work space is too small, especially since the back side printing portion is below, which may cause a problem. In short, this cylinder arrangement cannot be applied to a two-sided multicolor printing machine that prints on a paper size of about half a chrysanthemum.

【０００５】特公平３−２１３４６号公報には、菊半裁
紙程度の紙サイズに印刷する両面４色刷りの専用機が開
示されている。このものは、圧胴が版・ゴム胴径の３倍
直径である５胴型２色刷り印刷ユニットを４組設け、そ
の各印刷ユニットの圧胴どうしを上下方向に直接連接し
てゆく胴配列構成の両面４色刷りオフセット印刷機であ
る。更に述べれば、印刷機に供給された枚葉紙が、各圧
胴間でくわえ替えされながら下方より上方へと移送され
てゆく態様をもっている。[0005] Japanese Patent Publication No. 3-213346 discloses a dedicated machine for two-sided four-color printing for printing on a paper size of about half a chrysanthemum paper. This is a cylinder arrangement in which four sets of five-cylinder two-color printing units, each of which has an impression cylinder whose diameter is three times the plate and blanket cylinder diameter, are provided, and the impression cylinders of each printing unit are connected directly in the vertical direction. Is a two-sided four-color offset printing press. More specifically, the sheet fed to the printing press is transported upward from below while being held between the impression cylinders.

【０００６】上記のものは、胴による紙のくわえ替え回
数をそれまでに知られていた両面刷り機に比して極力少
なくして見当精度の向上を意図したことと、機械のコン
パクト化および操作性の向上を目的としたものである。
その成果については肯定できるとしても、以上のような
特殊形態であるので、タンデム形式について普遍性がな
く既成の作業者が馴染まない。The above-described apparatus is intended to improve register accuracy by minimizing the number of times of changing the paper by the cylinder as compared with the conventionally known double-sided printing press, and to reduce the size and operation of the machine. The purpose is to improve the performance.
Even if the result can be affirmed, the tandem form is not universal and is not familiar to established workers because of the special form described above.

【０００７】次に掲げる２例には、上記のものと同様な
５胴型２色刷り印刷ユニットの２組を横方向に連接して
構成するもので、両面各２色刷りの専用機が開示されて
いる。特開昭６３−８７２３４号のものは圧胴どうしを
直接連接し、特開平１−９９８４３号には両圧胴間に２
本の渡し胴（中間胴）を介して連接する構成である。In the following two examples, two sets of five-cylinder two-color printing units similar to those described above are connected in the horizontal direction, and a dedicated machine for two-color printing on both sides is disclosed. I have. Japanese Unexamined Patent Publication No. 63-87234 discloses that the impression cylinders are directly connected to each other.
It is configured to be connected via a transfer cylinder (intermediate cylinder) of a book.

【０００８】前者の明細書中には付言事項として、渡し
胴を介して表面刷り用に５胴型２色刷り印刷ユニットを
追加連接すれば裏面２色表面４色の多色刷り機の提供が
できる旨の記述はある（見方を変えれば表面４色、裏面
２色）。この構成では更に同様のものを追加連接すれ
ば、片面４色刷りはおろか６色刷刷りに形成することも
容易に考えられる。しかしながら、裏面は２色刷りに過
ぎず４色刷りすることについて技術的に推定される記載
はいささかもない。後者のものは、最初の印刷ユニット
で表面２色が印刷された後、枚葉紙は渡し胴２本を経て
裏面刷りの印刷ユニットに受け渡されるが、この５胴型
２色刷り印刷ユニットの２対の版・ゴム胴は圧胴に対し
印刷機後方の横方向から接する形態であるから、これ以
上印刷ユニットを連接していくことはできない。[0008] In the former specification, as an additional matter, it is possible to provide a multicolor printing machine of two colors on the back side and four colors on the front side by additionally connecting a five-cylinder type two-color printing unit for front-side printing via a transfer cylinder. (If you look at it differently, 4 colors on the front and 2 colors on the back). In this configuration, if the same thing is additionally connected, it is easily conceivable to form four-color printing on one side into six-color printing, let alone printing. However, the back side is only two-color printing, and there is little description that technically presumes that four-color printing is performed. In the latter case, after the two colors are printed on the front side in the first printing unit, the sheet is transferred to the back side printing unit via two transfer cylinders. Since the pair of plate and blanket cylinders are in contact with the impression cylinder from the lateral direction behind the printing press, the printing units cannot be connected further.

【０００９】[0009]

【発明が解決しようとする課題】本発明は上記事情のも
とに提案されたもので、印刷対象とする紙サイズの大少
にかかわらず、その何れにも設計上適用可能な胴配列形
態を有し、しかも枚葉紙両面に少なくとも４色刷りし得
る操作性が良いコンパクトな枚葉紙両面多色刷りオフセ
ット印刷機の提供を目的とする。SUMMARY OF THE INVENTION The present invention has been proposed in view of the above circumstances, and has a cylinder arrangement form which can be applied to any of paper sizes regardless of the size of paper to be printed. Another object of the present invention is to provide a compact sheet-fed double-sided multicolor offset printing press having good operability and capable of printing at least four colors on both sides of a sheet.

【００１０】[0010]

【課題を解決するための手段】本発明は上記の課題を達
成するために以下記載の構成とした。すなわち、版・ゴ
ム胴と圧胴との直径比が１：３である５胴型２色刷り印
刷ユニットを複数個設け、その圧胴間を圧胴と同径の渡
し胴で連接したタンデム型印刷装置を設定し、該装置を
印刷機の中央部分に据えてこれを表面刷り部となすこと
と、一方、版・ゴム胴径と圧胴径との直径比が前記同様
の１：３で構成される５胴型２色刷り印刷ユニットであ
って、該圧胴に対する版・ゴム胴２対の設定位置を印刷
機の前方または後方から操作可能に配置した２種類の印
刷ユニットを別途設定して、その各圧胴と、前記表面刷
り部の前後を占める印刷ユニットの各圧胴とをそれぞれ
直接連接させ、表面刷り部の前方および後方部に各２色
の裏面刷り部を構成したことと、更に前方裏面刷り部の
圧胴上方に給紙機構からの給紙を圧胴に受け渡す給紙胴
を連接させ、後方裏面刷り部の圧胴上方には排紙機構を
連接させて、少なくとも両面４色刷りすることができる
構成を特徴とした枚葉紙両面多色刷リオフセット印刷機
である。また、前記表面刷り部の５胴型２色刷り印刷ユ
ニットの版・ゴム胴と圧胴との直径比を１：４とし、前
記渡し胴も、版・ゴム胴径の４倍直径を持つものに置換
して構成したものを表面刷り部となし、裏面刷り用の前
記５胴型２色刷り印刷ユニットの圧胴も４倍直径とする
とともに、これらの圧胴に給紙胴と排紙機構を前記同様
に連接して構成した両面４色刷り機であっても良い。更
にまた、版・ゴム胴と圧胴との直径比を１：２に定めた
３胴型単色刷り印刷ユニット間を、圧胴と回径の渡し胴
が連接していくタンデム型印刷装置を表面刷り部とな
し、裏面刷り部として版・ゴム胴径と圧胴径との直径比
を１：３で（１：４でも可）前記同様の形態に形成した
５胴型２色刷り印刷ユニットを設け、その圧胴を前記表
面刷り部の圧胴に直接連接させたものであって、これら
の圧胴には給紙胴と排紙機構を前記同様に連接した構成
の両面４色刷り機である。The present invention has the following configuration to achieve the above object. That is, tandem-type printing in which a plurality of five-cylinder two-color printing units having a plate / rubber cylinder and impression cylinder diameter ratio of 1: 3 is provided, and the impression cylinders are connected by a transfer cylinder having the same diameter as the impression cylinder. The apparatus is set, and the apparatus is installed in the center of the printing press to form a front printing portion. On the other hand, the diameter ratio between the plate / rubber cylinder diameter and the impression cylinder diameter is 1: 3 as described above. A five-cylinder type two-color printing unit, wherein two types of printing units in which the setting positions of the plate and blanket cylinders with respect to the impression cylinder are operably arranged from the front or rear of the printing press are separately set; The respective impression cylinders and the respective impression cylinders of the printing unit occupying the front and rear of the front printing section are directly connected to each other, and a back printing section for each of two colors is formed in front and rear portions of the front printing section. Paper feed cylinder that transfers paper from the paper feed mechanism to the impression cylinder above the impression cylinder in the front and back printing section Is connected, the impression cylinder above the rear back surface printing unit by connecting the discharge mechanism, at least the sheet was characterized by a structure capable of double-sided four-color double-sided multicolor Li offset press. Also, the diameter ratio of the plate / rubber cylinder to the impression cylinder of the five-cylinder two-color printing unit of the front printing unit is 1: 4, and the transfer cylinder also has a diameter four times the plate / rubber cylinder diameter. The replacement is configured as a front-side printing unit, and the impression cylinders of the five-cylinder two-color printing unit for back-side printing are also quadruple in diameter. Similarly, it may be a two-sided four-color printing machine configured to be connected. Furthermore, a tandem type printing apparatus in which an impression cylinder and a transfer cylinder of a diameter are connected between a three-cylinder single-color printing unit in which a diameter ratio of a plate / rubber cylinder and an impression cylinder is set to 1: 2 is provided. A five-body two-color printing unit formed in the same manner as described above with a printing part and a backside printing part with a diameter ratio of a plate / rubber cylinder diameter to an impression cylinder diameter of 1: 3 (or 1: 4) is provided. The impression cylinder is directly connected to the impression cylinder of the front printing unit, and the impression cylinder is a double-sided four-color printing machine having a configuration in which a paper feed cylinder and a paper discharge mechanism are connected in the same manner as described above.

【００１１】[0011]

【作用】先ず、給紙板上を流れてくる枚葉紙の上面を表
面側と定義しておく。さて、上記の構成により、給紙さ
れてくる枚葉紙は周知のスイング機構と給紙渡し胴を経
由して、最初の５胴型２色刷り印刷ユニットの圧胴爪に
くわえ替えらて進行する。この時紙は反転されていて、
最初に裏面２色の印刷が実行される。この紙は圧胴どう
しが直接連接している次の印刷ユニットの圧胴爪へとく
わえ替えられて進行する。この際２色印刷された面は圧
胴面側にくるので、この圧胴とゴム胴との間で表面側の
印刷が実行される。ところで、この表面刷り部の印刷ユ
ニットは、上記の通りの５胴型２色刷り印刷ユニットで
あるのか、または３胴型単色刷りの印刷ユニットである
のか、その何れのものにおいても、所謂タンデム型印刷
装置であるので、この表面刷り部での印刷が完了した時
点では裏面２色と表面４色が印刷済みとなる。（表面刷
り部の印刷ユニットはタンデム型の特徴として増設でき
るので、表面刷り部は５胴型のもので６色、単胴型のも
のでは５色、または６色の多色印刷にして提供すること
ができる）。更に、表面刷り部の最後方の印刷ユニット
には５胴型２色刷り印刷ユニットが圧胴どうし直接連接
しているので、前記同様に圧胴爪でくわえ替えが行なわ
れると、印刷紙はここで再び反転されて裏面２色の追加
印刷が行なわれる。このようにして前記構成のものにお
いて少なくとも両面４色の印刷を実施することができ
る。First, the upper surface of the sheet flowing on the sheet supply plate is defined as the front side. Now, with the above-described configuration, the fed sheet advances via the well-known swing mechanism and the paper feeding transfer cylinder, in addition to the impression cylinder claws of the first five-cylinder two-color printing unit. . At this time, the paper was turned over,
First, printing of two colors on the back side is executed. This paper is further transferred to the impression cylinder pawl of the next printing unit, to which the impression cylinders are directly connected. At this time, since the surface on which the two colors are printed comes to the impression cylinder surface side, printing on the front side is performed between the impression cylinder and the blanket cylinder. Incidentally, whether the printing unit of the front printing unit is the five-cylinder two-color printing unit as described above or the three-cylinder single-color printing unit, so-called tandem-type printing is used. Since the apparatus is an apparatus, two colors on the back surface and four colors on the front surface are already printed at the time when printing on the front printing unit is completed. (Since the printing unit of the front printing unit can be added as a tandem type feature, the front printing unit is provided as a multi-color printing of 6 colors for a 5-cylinder type, 5 colors or 6 colors for a single-cylinder type. be able to). Furthermore, since the five-cylinder two-color printing unit is directly connected to the impression unit at the rearmost printing unit of the front-side printing unit, if the gripper is changed by the impression cylinder in the same manner as described above, the printing paper will be here. The printing is reversed again and the additional printing of the two back colors is performed. In this way, printing of at least four colors on both sides can be performed with the above configuration.

【００１２】[0012]

【実施例】以下、図面に基づいて本発明を詳述する。図
１はこの発明の第１実施例を示す側面図、図２および図
３は部分説明図、図４および図５は第２実施例と第３実
施例のそれぞれの側面図である。なお、各図面における
図面符号は共通する回等部分に同一符号を付してある。BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a side view showing a first embodiment of the present invention, FIGS. 2 and 3 are partial explanatory views, and FIGS. 4 and 5 are side views of a second embodiment and a third embodiment, respectively. In the drawings, the same reference numerals are given to common parts such as drawings.

【００１３】図１は、版・ゴム胴と圧胴との直径比が
１：３である５胴型２色刷り印刷ユニットを、枚葉紙両
面４色刷りオフセット印刷機の表面刷り部と裏面刷り部
に適用して構成した本発明の第１実施例である。その第
１実施例について詳述する。符号１で示すものは版胴で
２はゴム胴である。版胴１とゴム胴２は等しい直径を有
する。３は４本の圧胴を示す。圧胴３は版胴１とゴム胴
２の３倍の直径を持って構成される。圧胴３内に付与し
た符号ＡおよびＢそしてＣは、前記の版胴１およびゴム
胴２が各２本と圧胴３が１本の組合せで５胴型２色刷り
印刷ユニットを構成しているものを示す（図中前記の圧
胴の各中心と版・ゴム胴の各中心を線で結んで示したも
のがそれである）。その内の印刷ユニットＡの２個は前
記圧胴３と同径の渡し胴５を挟んで共に水平に連接して
いる。これは所謂タンデム型の印刷装置であって本発明
印刷機の中央部分に位置している。圧胴３と渡し胴５に
は周面３等分位置に図示しない紙くわえ爪が装置されて
いて図示しない枚葉紙の転送を矢印のように行なう。こ
のタンデム型の印刷装置は表面刷り部６として位置付け
られ、該部分で表面４色刷りが行なわれるようになして
ある。そして一方、上記と同様の胴比率を有するがその
形態を異にしている２種類の５胴型２色刷り印刷ユニッ
トＢおよびＣを設ける。すなわち、表面刷り部の印刷ユ
ニットＡは圧胴３の上方に２本のゴム胴２が接し、ゴム
胴２の上方に版胴１が接する態様である。印刷ユニット
Ｂは圧胴３の上方に給紙胴７が連接していて、この圧胴
３に接する２本のゴム胴２とそのゴム胴２に接する版胴
１は印刷機の前方から操作可能に配置されたものであ
る。印刷ユニットＣは圧胴３の上方に排紙機構８が連接
していて、この圧胴３に接する２本のゴム胴２とそのゴ
ム胴２に接する版胴１は印刷機の後方から操作可能に配
置されたものである。此等の印刷ユニットＢおよびＣ
は、その圧胴が前記した表面刷り部６の前後に位置する
圧胴と、圧胴どうし水平に直接連接させている。この構
成によって表面刷り部６の前後に各２色の裏面刷り部
９、１０が形成される。FIG. 1 shows a five-cylinder two-color printing unit in which the diameter ratio of a plate / blanket cylinder to an impression cylinder is 1: 3, and a front printing unit and a back printing unit of a sheet double-sided four-color offset printing press. 1 is a first embodiment of the present invention configured by applying the present invention. The first embodiment will be described in detail. Reference numeral 1 denotes a plate cylinder, and 2 denotes a blanket cylinder. The plate cylinder 1 and the blanket cylinder 2 have the same diameter. Reference numeral 3 denotes four impression cylinders. The impression cylinder 3 is configured to have a diameter three times that of the plate cylinder 1 and the blanket cylinder 2. Symbols A, B and C given in the impression cylinder 3 indicate that the plate cylinder 1 and the blanket cylinder 2 are each two and the impression cylinder 3 is one to constitute a five-cylinder two-color printing unit. (In the figure, the centers of the impression cylinder and the centers of the plate and blanket cylinders are connected by lines.) Two of the printing units A are horizontally connected together with a transfer cylinder 5 having the same diameter as the impression cylinder 3 therebetween. This is a so-called tandem type printing apparatus, which is located at the center of the printing press of the present invention. Each of the impression cylinder 3 and the transfer cylinder 5 is provided with a paper holding claw (not shown) at a position equally divided by the circumferential surface, and transfers a sheet (not shown) as shown by an arrow. This tandem-type printing apparatus is positioned as a front-side printing unit 6, and the front four-color printing is performed in this portion. On the other hand, two types of five-cylinder two-color printing units B and C having the same body ratio as above but having different forms are provided. That is, the printing unit A of the front-side printing unit has a configuration in which two blanket cylinders 2 are in contact with the impression cylinder 3 and the plate cylinder 1 is in contact with the blanket cylinder 2. In the printing unit B, a paper feed cylinder 7 is connected above the impression cylinder 3, and two blanket cylinders 2 contacting the impression cylinder 3 and a plate cylinder 1 contacting the blanket cylinder 2 can be operated from the front of the printing press. It is arranged in. In the printing unit C, a paper discharge mechanism 8 is connected above the impression cylinder 3, and two blanket cylinders 2 contacting the impression cylinder 3 and a plate cylinder 1 contacting the blanket cylinder 2 can be operated from the rear of the printing press. It is arranged in. These printing units B and C
Are directly connected horizontally with the impression cylinders whose impression cylinders are located before and after the front printing unit 6. With this configuration, two-color back printing parts 9 and 10 are formed before and after the front printing part 6.

【００１４】付言すると、上記のように表面刷り部６を
構成し、各版胴間の間隔を一定にして（版胴軸心が圧胴
の垂直な接線上にある）、ゴム胴の位置を圧胴軸心方向
に版胴径の５％程度ずつ寄せて設定すると、５胴型２色
刷り印刷ユニットを用いたものでありながら版胴の回転
位相を揃えることができる。それは版替え等の操作性向
上に寄与する。In addition, the surface printing unit 6 is configured as described above, and the interval between the plate cylinders is made constant (the plate cylinder axis is on a vertical tangent to the impression cylinder), and the position of the blanket cylinder is adjusted. When the printing cylinder is set so as to be shifted by about 5% of the plate cylinder diameter in the direction of the axis of the impression cylinder, it is possible to make the rotation phases of the printing cylinder uniform even though a five-cylinder two-color printing unit is used. It contributes to improved operability such as plate change.

【００１５】ここで、裏面刷り部９および１０におい
て、版・ゴム胴を操作可能に配置したということについ
て更に詳述する。オフセット印刷機の取り扱いについて
は、版替え・ゴム胴の洗浄・湿し水の調整・インキング
装置各部の調整・等々各種の操作を必要とすることは言
うまでもない。（添付図面の中に概略的に描いてある湿
し水機構１１と、インキング装置１２は極めて普遍的に
用いられているローラ配列のものを示してある）。図１
に示すものは上記の操作を矢印１３、１４および１５、
１６の部位で容易に行なえるように胴角度（版・ゴム・
圧胴のなす１８０゜以内の角度）を選定し配置してあ
る。Here, the fact that the plate and blanket cylinders are operably arranged in the back side printing units 9 and 10 will be described in further detail. It goes without saying that the offset printing machine requires various operations such as plate changing, cleaning of the blanket cylinder, adjustment of dampening solution, adjustment of each part of the inking device, and the like. (The dampening mechanism 11 and the inking device 12 schematically illustrated in the accompanying drawings are of a very widely used roller arrangement). FIG.
Indicate the above operations with arrows 13, 14 and 15,
The body angle (plate, rubber,
The angle within 180 degrees of the impression cylinder) is selected and arranged.

【００１６】以下、図２および図３を参照し具体的に数
字をあげて説明するが、本発明はこの数字に限定される
べきものではなく、要は前方および後方から接近できる
作業空間が形成できれば良いのである。いま、菊半裁判
（４６９ｍｍ×６３６ｍｍ）程度の比較的小さい紙寸法
のものを対象とする印刷機を例に説明する。版・ゴム胴
（１・２）の径を仮に２４０ｍｍに設定すれば圧胴３は
７２０ｍｍである。前方裏面刷り部９の５胴型２色刷り
印刷ユニットにおける胴角度を、１色・２色目共に下向
きに設定する。図２の右側図に示すものは図１の前方裏
面刷り部９と同じ胴配列を示した。圧胴３の中心１７と
上方ゴム胴心１８を結ぶ線が水平線ＸＹとなす角度１
９、および下方ゴム胴心２０が同様にＸＹとなす角度２
１をそれぞれ３９゜と３８゜に設定するとともに、上方
印刷部の胴角度２２を１０８゜、下方印刷部の胴角度２
３を１４５゜に設定したものである。この設定によれ
ば、図１で見るように給紙板２４と上方の版・ゴム胴間
および１色目と２色目の胴間に、印刷機の前方から近接
できる前記の作業空間１３、１４が形成される。因み
に、図に見るインキング装置１２の最外端から各ゴム胴
面までの距離は４８０ｍｍ内外であり、ゴム胴の洗浄ス
ペースはもとより、版胴についても図示しない公知の半
自動給版装置を用いた給版可能なスペースが形成できる
ので操作性が良い。In the following, specific explanations will be given with reference to FIGS. 2 and 3, but the present invention should not be limited to these numbers. In short, a work space accessible from the front and the rear is formed. It is good if possible. Now, a printing machine for a relatively small paper size, such as a chrysanthemum half trial (469 mm × 636 mm), will be described as an example. If the diameter of the plate and blanket cylinder (1.2) is set to 240 mm, the impression cylinder 3 is 720 mm. The cylinder angle of the front and rear printing unit 9 in the five-cylinder two-color printing unit is set downward for both the first color and the second color. 2 shows the same cylinder arrangement as the front and back printing unit 9 in FIG. Angle 1 between the line connecting the center 17 of the impression cylinder 3 and the upper rubber core 18 with the horizontal line XY
9, and the angle 2 between the lower rubber core 20 and XY
1 are set to 39 ° and 38 °, respectively, the cylinder angle 22 of the upper printing section is set to 108 °, and the cylinder angle 2 of the lower printing section is set to 2 °.
3 is set to 145 °. According to this setting, as shown in FIG. 1, the work spaces 13 and 14 that can be approached from the front of the printing press are formed between the paper feed plate 24 and the upper plate / rubber cylinder and between the first and second color cylinders. Is done. Incidentally, the distance from the outermost end of the inking device 12 shown in the drawing to each blanket cylinder surface is 480 mm and outside, and a well-known semi-automatic plate feeding device (not shown) was used for the blanket cylinder as well as the blanket cylinder cleaning space. Operability is good because a space for plate feeding can be formed.

【００１７】後方裏面刷り部１０における胴角度は、３
色・４色目とも上向きに設定した。図２の左側図に示す
ものは図１の後方裏面刷り部１０と回じ胴配列を示す。
圧胴３の中心２５と下方ゴム胴心２６を結ぶ線が水平線
ＸＹとなす角度２７、および上方ゴム胴心２８が同様に
ＸＹとなす角度２９をそれぞれ３２゜と２０゜に設定す
るとともに、下方印刷部の胴角度３０を１００゜、上方
印刷部の胴角度３１を１４２゜に設定したものである。
この設定によれば、作業空間１５、１６が形成されるの
で、印刷機後方からの接近が容易で前方裏面刷り部９同
様に操作性が良い。The body angle of the rear rear printing unit 10 is 3
The color and the fourth color were set upward. 2 shows the rear back printing unit 10 and the turning cylinder arrangement in FIG.
The angle 27 between the line connecting the center 25 of the impression cylinder 3 and the lower rubber core 26 with the horizontal line XY, and the angle 29 with the upper rubber core 28 also forming XY are set to 32 ° and 20 °, respectively. The cylinder angle 30 of the printing unit is set to 100 °, and the cylinder angle 31 of the upper printing unit is set to 142 °.
According to this setting, since the work spaces 15 and 16 are formed, the work space 15 and 16 can be easily approached from the rear of the printing press, and the operability is good as in the case of the front rear printing unit 9.

【００１８】特に本発明の構成を小型両面４色刷り印刷
機に適用する場合、上記の裏面刷り部９、１０のよう
に、胴角度２２、２３は下向きに、また２７、２９は上
向きに設定することで、従来技術の項で挙げた例に比し
て操作性に優れ、かつ胴間の紙のくわえ替え回数も前記
特公平３−２１３４６号の４回に次いで５回と渡し胴５
が１本増えるだけなので見当精度も良好で、また印刷物
の汚れの問題についても好結果をもたらす。In particular, when the configuration of the present invention is applied to a small-sized two-sided four-color printing press, the barrel angles 22, 23 are set to be downward, and the cylinders 27, 29 are set to be upward, as in the above-described back side printing units 9, 10. As a result, the operability is superior to that of the example described in the section of the prior art, and the number of times of changing the paper between the cylinders is five, which is four times the number of times described in Japanese Patent Publication No. 21346/1991.
Is increased by only one, so that the registration accuracy is good, and the problem of the stain on the printed matter is also obtained.

【００１９】図３の右側図は、前方裏面刷り部９の５胴
型２色刷り印刷ユニットにおける胴配列を、１色目は上
向きにして２色目は下向きに設定したものである。また
左側図は、後方裏面刷り部１０の胴配列を示すもので、
図３の右側図に示すものを左右勝手違いに形成してあ
る。したがって、右側図における圧胴心３２とゴム胴心
３３を結んだ線が水平線ＸＹとなす角度３４と、左側図
において圧胴心３５とゴム胴心３６を結んだ線が水平線
ＸＹとなす角度３７は同じ２０゜である。同様に、裏面
刷り部９、１０下方のゴム胴心３８、３９が水平線ＸＹ
となす角度４０、４１も同じであって１８゜に設定し
た。また、１色目上方の胴角度４２と４色目上方の胴角
度４３は１４０゜で、下方の胴角度４４、４５は１４７
゜に設定してある。The right side of FIG. 3 shows the cylinder arrangement in the five-cylinder two-color printing unit of the front and rear printing unit 9 with the first color set upward and the second color set downward. In addition, the left view shows the body arrangement of the rear back printing unit 10,
The one shown on the right side of FIG. Accordingly, the angle 34 between the line connecting the pressure body 32 and the rubber body 33 in the right figure forms a horizontal line XY, and the angle 37 between the line connecting the pressure body 35 and the rubber body 36 in the left figure forms the horizontal line XY. Is the same 20 °. Similarly, the rubber cores 38 and 39 below the back printing units 9 and 10 are aligned with the horizontal line XY.
The angles 40 and 41 were the same and were set to 18 °. The upper body angle 42 of the first color and the upper body angle 43 of the fourth color are 140 °, and the lower body angles 44 and 45 are 147.
Set to ゜.

【００２０】四六全判紙、菊全判等の紙サイズが大きい
ものの印刷には、相応の大きさを持った胴径（例えば３
４０ｍｍ）のものが採択されるから、図２に呈示した形
態のものでは、インキング装置１２の最外端から各ゴム
胴面までの距離は６８０ｍｍ内外となって操作性が悪く
なる。このようなものに対応するために、図３の形態の
ものが有効である。すなわち、裏面刷り部９、１０は共
に上下の胴が圧胴に対し横向きのハの字状になっている
ので胴間が大きく開き、横方向から接近しての操作に問
題はない。前方裏面刷り部９上方位置の版胴に対する版
替え等の操作は給紙板２４を回動させることで操作す
る。これについては、裏面刷り部９が同様形態をなす前
記した特開昭６３−８７２３４号に記述がある。後方裏
面刷り部１０の４色目版胴に所属するインキング装置
は、図１に示されているものと同様に版胴１の上方に配
置できるので、版胴の回転方向は１色目と変わらないに
もかかわらず版替え等の操作は図１と同様な作業空間１
６から行なえる。For printing large-sized paper such as 46-size paper and chrysanthemum-size paper, a body diameter (for example, 3
In the embodiment shown in FIG. 2, the distance from the outermost end of the inking device 12 to each blanket surface is about 680 mm, and the operability deteriorates. To cope with such a situation, the configuration shown in FIG. 3 is effective. That is, since the upper and lower cylinders of the back side printing units 9 and 10 are both formed in the shape of the letter "C" in the horizontal direction with respect to the impression cylinder, the gap between the cylinders is greatly widened, and there is no problem in operation when approaching from the lateral direction. Operations such as plate change on the plate cylinder located above the front rear printing unit 9 are performed by rotating the sheet supply plate 24. This is described in the above-mentioned Japanese Patent Application Laid-Open No. 63-87234 in which the back side printing unit 9 has the same configuration. The inking device belonging to the fourth-color plate cylinder of the rear-side printing unit 10 can be arranged above the plate cylinder 1 in the same manner as that shown in FIG. 1, so that the rotation direction of the plate cylinder is the same as that of the first color. Nevertheless, operation such as plate change is the same work space 1 as in FIG.
You can start from 6.

【００２１】次に図４の第２実施例について述べる。第
２実施例の特徴とするところは、版・ゴム胴（１・２）
と圧胴３との直径比が１：４である５胴型２色刷り印刷
ユニットを、第１実施例同様に表面刷り部６と裏面刷り
部９、１０に用いたこと、表面刷り部６の複数印刷ユニ
ットを圧胴３と同径の渡し胴５で水平に連接したことに
ある。つまり第１実施例の３倍径のものを４倍径のもの
に置換して構成した変形例である。このように５胴型２
色刷り印刷ユニットに従来に例を見ない４倍圧胴を組み
入れたのは、第１実施例構成のものにおいて作業空間を
更に広げるための措置である。この構成は菊半裁判程度
の比較的小さい紙サイズを対象とする両面４色刷り機に
おいては、胴数と紙のくわえ替え数を少なくして作業空
間が広がるので有効である。ただ第１実施例構成のもの
には、前記したように版胴の回転位相が揃えられる利点
があるのに対し、第２実施例にそれを求めることはでき
ない。Next, a second embodiment shown in FIG. 4 will be described. The feature of the second embodiment is that the plate and blanket cylinder (1.2)
A five-cylinder type two-color printing unit having a diameter ratio of 1: 4 to the impression cylinder 3 was used for the front printing unit 6 and the back printing units 9 and 10 as in the first embodiment. This is because a plurality of printing units are horizontally connected by a transfer cylinder 5 having the same diameter as the impression cylinder 3. That is, this is a modified example in which the triple diameter of the first embodiment is replaced with a quadruple diameter. Thus, the five-body type 2
The incorporation of an unprecedented quadruple pressure cylinder in the color printing unit is a measure for further expanding the working space in the first embodiment. This configuration is effective in a two-sided four-color printing machine for a relatively small paper size, such as a chrysanthemum half trial, because the number of cylinders and the number of paper changes are reduced and the work space is expanded. However, while the configuration of the first embodiment has the advantage that the rotational phases of the plate cylinders are aligned as described above, it cannot be obtained in the second embodiment.

【００２２】図５は第３実施例である。表面刷り部６
は、版・ゴム胴（１・２）と圧胴３との直径比が１：２
である３胴型単色刷り印刷ユニットの圧胴間を、圧胴と
同径の渡し胴５で連接したもので、タンデム型多色刷り
機の胴配列として普遍化しているものである。第３実施
例は、この表面刷り部６の前後部に位置する圧胴３に、
裏面刷り部９および１０の５胴型２色刷り印刷ユニット
の圧胴３を直接連接したものである。紙の胴によるくわ
え回数は、前２例に比較して表面刷り部６部分で増加し
ているが、裏面刷り部９、１０では２回と極めて少なく
なっている。また表面刷り部６の３胴からなる印刷ユニ
ットの胴配列形態は、逆くの字状のものであることが好
ましい。FIG. 5 shows a third embodiment. Front printing unit 6
Means that the diameter ratio between the plate / blanket cylinder (1.2) and the impression cylinder 3 is 1: 2
The three cylinder type single-color printing printing unit is connected between the impression cylinders by a transfer cylinder 5 having the same diameter as that of the impression cylinder, and is commonly used as a cylinder arrangement of a tandem-type multicolor printing machine. In the third embodiment, the impression cylinder 3 located at the front and rear portions of the front printing unit 6 includes:
The impression cylinders 3 of the five-cylinder two-color printing unit of the back printing units 9 and 10 are directly connected. The number of grips by the paper cylinder is increased in the front printing unit 6 compared to the previous two examples, but is extremely small at two in the back printing units 9 and 10. Further, it is preferable that the arrangement of the cylinders of the printing unit having the three cylinders of the front printing unit 6 is inverted.

【００２３】以上において、第２、第３実施例における
前方裏面刷り部９および後方裏面刷り部１０について
は、第１実施例の説明において、図２と図３を参照して
詳細に記述したので重複を避ける。なお図面において、
符号４６はスイング機構、４７は給紙機、４８はチェー
ンデリバリー装置を概略的に示す。In the above, the front and rear back printing units 9 and 10 in the second and third embodiments have been described in detail with reference to FIGS. 2 and 3 in the description of the first embodiment. Avoid duplication. In the drawings,
Reference numeral 46 indicates a swing mechanism, 47 indicates a paper feeder, and 48 indicates a chain delivery device.

【００２４】[0024]

【発明の効果】以上の説明にみるように、本発明は表面
刷り部の前後位置にある圧胴に対し、５胴型２色刷り印
刷ユニットの圧胴をそれぞれ直接連接させて、表面刷り
部の前後に各２色の裏面刷り部を設けた構成であるか
ら、裏面４色刷りに関しては、紙のくわえ替えは表面刷
り部の前後で２回と極めて少ない。したがって見当精度
には好結果をもたらすことになる。また、裏面刷り用に
配置した５胴型２色刷り印刷ユニットは、印刷機の前方
向と後方向からそれぞれ接近して、必要な操作が行なえ
るので、菊半裁判程度の、比較的小判のものを印刷する
小型両面４色刷り機として操作性が良く、コンパクトに
構成できる。さらに、裏面刷り部の圧胴に対し、２対の
版・ゴム胴の設定位置を大型機向きに配置し得るから、
両面４色刷り機を構成することについて設計上の適用範
囲が広い。As can be seen from the above description, according to the present invention, the impression cylinders of the five-cylinder two-color printing unit are directly connected to the impression cylinders at the front and rear positions of the front printing section, respectively. Since the back side printing unit is provided for each of two colors before and after, the number of paper changes for the back side four color printing is very small, twice before and after the front side printing unit. Therefore, a good result is obtained in the register accuracy. In addition, the five-cylinder two-color printing unit arranged for printing on the back side can perform necessary operations by approaching from the front and rear sides of the printing press. The operability is good as a small double-sided four-color printing machine that prints images, and it can be made compact. Furthermore, since the set positions of the two pairs of plate and blanket cylinders can be arranged for a large-sized machine with respect to the impression cylinder of the reverse printing unit,
There is a wide range of applications in designing a two-sided four-color printing machine.

【図面の簡単な説明】[Brief description of the drawings]

【図１】本発明に係わる第１実施例を示すもので、枚葉
紙両面４色刷りオフセット印刷機の全体側面概要図。FIG. 1 shows a first embodiment according to the present invention, and is an overall side schematic view of a sheet-fed double-sided four-color offset printing press.

【図２】本発明の裏面刷り部の説明図である。FIG. 2 is an explanatory diagram of a back side printing unit of the present invention.

【図３】本発明の別形態の裏面刷り部についての説明図
である。FIG. 3 is an explanatory diagram of a back side printing unit according to another embodiment of the present invention.

【図４】本発明に係わる第２実施例を示すもので、枚葉
紙両面４色刷りオフセット印刷機の全体側面概要図。FIG. 4 is a schematic side view of a whole side of a sheet-fed double-sided four-color offset printing press according to a second embodiment of the present invention.

【図５】本発明に係わる第３実施例を示すもので、枚葉
紙両面４色刷りオフセット印刷機の全体側面概要図。FIG. 5 shows a third embodiment according to the present invention, and is an overall side schematic view of a sheet-fed double-sided four-color offset printing press.

【符号の説明】[Explanation of symbols]

１・・・版胴、 ２・・・ゴム胴、 ３・・・圧胴、
５・・・渡し胴、 ６・・・表面刷り部（タンデム型の
印刷装置）、 ７・・・給紙胴、 ８・・・排紙機構、
９・・・前方の裏面刷り部、 １０・・・後方の裏面
刷り部、 Ａ・・・表面刷り部の５胴型２色刷り印刷ユ
ニット、 Ｂ・・・前方裏面刷り部の５胴型２色刷り印
刷ユニット、 Ｃ・・・後方裏面刷り部の５胴型２色刷
り印刷ユニット。1 ... plate cylinder, 2 ... blanket cylinder, 3 ... impression cylinder,
5: transfer cylinder, 6: front-side printing unit (tandem-type printing device), 7: paper feed cylinder, 8: paper discharge mechanism,
9: front-side printing unit, 10: rear-side printing unit, A: 5-cylinder 2-color printing unit of front-side printing unit, B: 5-cylinder 2-color printing unit of front-back printing unit Printing unit, C: 5-cylinder two-color printing unit with a rear-side printing unit.

Claims (3)

【特許請求の範囲】[Claims] 【請求項１】版・ゴム胴と圧胴との直径比が１：３であ
る５胴型２色刷り印刷ユニットを複数個設け、その圧胴
間を圧胴と同径の渡し胴で連接したタンデム型印刷装置
を設定し、該装置を印刷機の中央部分に据えてこれを表
面刷り部となすことと、一方、版・ゴム胴径と圧胴径と
の直径比が前記同様の１：３で構成される５胴型２色刷
り印刷ユニットであって、該圧胴に対する版・ゴム胴２
対の設定位置を印刷機の前方または後方から操作可能に
配置した２種類の印刷ユニットを別途設定して、その各
圧胴と、前記表面刷り部の前後を占める印刷ユニットの
各圧胴とをそれぞれ直接連接させ、表面刷り部の前方お
よび後方部に各２色の裏面刷り部を構成したことと、更
に前方裏面刷り部の圧胴上方に給紙機構からの給紙を圧
胴に受け渡す給紙胴を連接させ、後方裏面刷り部の圧胴
上方には排紙機構を連接させて、少なくとも両面に４色
刷りすることができる構成を特徴とする枚葉紙両面多色
刷りオフセット印刷機。1. A plurality of five-cylinder two-color printing units having a diameter ratio of a plate / rubber cylinder to an impression cylinder of 1: 3 are provided, and the impression cylinders are connected by a transfer cylinder having the same diameter as the impression cylinder. A tandem-type printing apparatus is set up, and the apparatus is installed in the center of the printing press to form a surface printing portion. On the other hand, the diameter ratio between the plate / rubber cylinder diameter and the impression cylinder diameter is the same as the above: 3. A five-cylinder two-color printing unit comprising a plate and a blanket cylinder 2 for the impression cylinder.
Two types of printing units in which the pair setting positions are operably arranged from the front or the rear of the printing press are separately set, and each impression cylinder and each impression cylinder of the printing unit occupying the front and rear of the front printing unit are set. Each of them is directly connected to each other to form back printing units of two colors at the front and rear portions of the front printing unit, and to transfer the paper from the paper feeding mechanism to the impression cylinder above the impression cylinder of the front back printing unit. A sheet-fed double-sided multicolor offset printing press characterized by a configuration in which a paper feed cylinder is connected, and a paper discharge mechanism is connected above an impression cylinder in a rear-side printing section, so that at least both sides can be printed in four colors. 【請求項２】版・ゴム胴と圧胴との直径比が１：４であ
る５胴型２色刷り印刷ユニットを複数個設け、その圧胴
間を圧胴と同径の渡し胴で連接したタンデム型印刷装置
を設定し、該装置を印刷機の中央部分に据えてこれを表
面刷り部となすことと、一方、版・ゴム胴径と圧胴径と
の直径比が前記同様の１：４で構成される５胴型２色刷
り印刷ユニットであって、該圧胴に対する版・ゴム胴２
対の設定位置を印刷機の前方または後方から操作可能に
配置した２種類の上記印刷ユニットを設定して、その各
圧胴と、前記した表面刷り部の前後を占める印刷ユニッ
トの各圧胴とをそれぞれ直接連接させ、表面刷り部の前
方および後方部に各２色の裏面刷り部を構成したこと
と、更に前方裏面刷り部の圧胴上方に給紙機構からの給
紙を圧胴に受け渡す給紙胴を連接させ、後方裏面刷り部
の圧胴上方には排紙機構を連接させて、少なくとも両面
に４色刷りすることができる構成を特徴とする枚葉紙両
面多色刷りオフセット印刷機。2. A plurality of five-cylinder two-color printing units having a diameter ratio of a plate / rubber cylinder and an impression cylinder of 1: 4 are provided, and the impression cylinders are connected by a transfer cylinder having the same diameter as the impression cylinder. A tandem-type printing apparatus is set up, and the apparatus is installed in the center of the printing press to form a surface printing portion. On the other hand, the diameter ratio between the plate / rubber cylinder diameter and the impression cylinder diameter is the same as the above: 5. A five-cylinder two-color printing unit comprising a plate and a blanket cylinder 2 for the impression cylinder.
Two types of the above-mentioned printing units, in which the pair setting positions are operably arranged from the front or the rear of the printing press, are set, and their respective impression cylinders, and the respective impression cylinders of the printing unit occupying the front and rear of the front printing unit. Are directly connected to each other to form two-color back printing portions at the front and rear of the front printing portion, and receive the paper from the paper feeding mechanism above the impression cylinder of the front back printing portion to the impression cylinder. A sheet-fed double-sided multicolor offset printing press characterized by a configuration in which a paper feed cylinder to be transferred is connected, and a paper discharge mechanism is connected above an impression cylinder in a rear-side printing section, so that at least both sides can be printed in four colors. 【請求項３】版・ゴム胴と圧胴との直径比が１：２であ
る３胴型単色刷り印刷ユニットの圧胴間を圧胴と同径の
渡し胴で連接したタンデム型印刷装置を設定し、該装置
を印刷機の中央部分に据えてこれを表面刷り部となすこ
とと、一方、版・ゴム胴径と圧胴径との直径比が１：３
である５胴型２色刷り印刷ユニットであって、該圧胴に
対する版・ゴム胴２対の設定位置を印刷機の前方または
後方から操作可能に配置した２種類の上記印刷ユニット
を設定して、その各圧胴と前記した表面刷り部の前後を
占める印刷ユニットの各圧胴とをそれぞれ直接連接さ
せ、表面刷り部の前方および後方部に各２色の裏面刷り
部を構成したことと、更に前方裏面刷り部の圧胴上方に
給紙機構からの給紙を圧胴に受け渡す給紙胴を連接さ
せ、後方裏面刷り部の圧胴上方には排紙機構を連接させ
て、少なくとも両面に４色刷りすることができる構成を
特徴とする枚葉紙両面多色刷りオフセット印刷機。3. A tandem-type printing apparatus in which the impression cylinders of a three-cylinder single-color printing printing unit having a plate / rubber cylinder / impression cylinder having a diameter ratio of 1: 2 are connected by a transfer cylinder having the same diameter as the impression cylinder. And setting the device in the center of the printing press to make it a surface printing portion, while the ratio of plate / rubber cylinder diameter to impression cylinder diameter is 1: 3.
A two-color printing unit of a five-cylinder type, wherein two types of the above-described printing units are provided in which the setting positions of two pairs of plate and blanket cylinders with respect to the impression cylinder are operable from the front or the rear of the printing press. The respective impression cylinders and the respective impression cylinders of the printing unit occupying the front and rear of the front printing section are directly connected to each other, and a back printing section for each of two colors is formed at the front and rear portions of the front printing section. A paper feed cylinder that transfers the paper from the paper feed mechanism to the impression cylinder is connected above the impression cylinder of the front rear printing unit, and a paper ejection mechanism is connected above the impression cylinder of the rear back printing unit. A sheet-fed double-sided multicolor offset printing press characterized by a configuration capable of performing four-color printing.