JPS5925649Y2 - Printer - Google Patents

Description

【考案の詳細な説明】 本考案は印刷機の圧胴とゴム胴のシリンダ表面が間欠的
に接触する時の衝撃を緩和する装置に関するものである
。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for mitigating the impact caused when the impression cylinder of a printing press and the cylinder surface of a blanket cylinder intermittently come into contact with each other.

従来の印刷機について第１図ないし第２図に基づいて説
明する。A conventional printing press will be explained based on FIGS. 1 and 2.

図において１はゴム胴、２は圧胴、３は版胴、４，４′
は製胴、５はゴム胴１の表面に巻付けたブランケット、
６は印刷紙７を搬送する爪である。In the figure, 1 is a blanket cylinder, 2 is an impression cylinder, 3 is a plate cylinder, 4, 4'
5 is a blanket wrapped around the surface of the rubber cylinder 1,
6 is a claw that conveys the printing paper 7.

前記各側は第１図矢印の方向に回転している。Each side is rotated in the direction of the arrow in FIG.

印刷紙７は爪６にはさまれて搬送され、爪６のくわえ変
えにより製胴４から圧胴２を通って製胴４′に搬送され
る。The printing paper 7 is conveyed between the claws 6, and as the claws 6 change their grips, the printing paper 7 is conveyed from the forming cylinder 4 through the impression cylinder 2 to the forming cylinder 4'.

一方絵柄は版胴３の表面に取付けられた版にインクが付
けられ、それがゴム胴１の表面に取付けられたブランケ
ット５に転位され、圧胴２とゴム胴１の間を通る印刷紙
７に印刷される。On the other hand, the pattern is created by applying ink to a plate attached to the surface of the printing cylinder 3, which is transferred to a blanket 5 attached to the surface of the blanket cylinder 1, and a printing paper 7 passing between the impression cylinder 2 and the blanket cylinder 1. printed on.

このような印刷機では圧胴２とゴム胴１のシリンダ表面
の出会い（第１図の状態）による突然の負荷増加がショ
ックとなり、それが回転変動となり版胴３とゴム胴１の
接触部Ａに伝達され、Ａ部がズして版胴３からゴム胴１
へ転位中のインキが流れあるいは太りという状態となる
。In such a printing press, a sudden increase in load caused by the meeting of the cylinder surfaces of the impression cylinder 2 and the blanket cylinder 1 (the situation shown in Figure 1) causes a shock, which causes rotational fluctuations and the contact area A between the plate cylinder 3 and the blanket cylinder 1. , the A section is shifted from the plate cylinder 3 to the blanket cylinder 1.
The ink that is being transferred to the ink flows or thickens.

即ち、第２図イに示すような正常な網点８ （インキの
着いている部分）がＡ部では第２図口に示すような網点
９となる。That is, normal halftone dots 8 (portion with ink) as shown in FIG. 2A become halftone dots 9 as shown in the opening of FIG.

そしてこの網点９を持つＡ部が印刷紙に転位されると印
刷面にその左右方向に巾５〜１０ｍｍ程度の濃い線が走
っているように見える。When portion A having the halftone dots 9 is transferred onto printing paper, a dark line with a width of about 5 to 10 mm appears to run in the left and right direction on the printing surface.

これがショック目（筋目）と呼ばれる印刷障害の一つで
ある。This is one of the printing defects called shock stitches (streaks).

最近印刷物の多色化とともに印刷物の品質向上に対する
要求が高まるに従って、この筋目の解消が望まれている
。Recently, as printed matter has become more multi-colored and demands for improved quality of printed matter have increased, it has been desired to eliminate these lines.

本考案はゴム胴に固着されたベアラから同ゴム胴軸端方
向に固着され前記ベアラ外径と同一外径を有する鉄輪及
び圧胴にその軸方向位置が前記鉄輪に対応する位置に取
付けられるとともに同圧胴の切欠部の圧胴回転方向下流
端での外径が圧胴に取付けられたベアラと同一で上流側
に行くにしたがい外径が漸増し上流端での突出量は前記
鉄輪との接触負荷が前記ゴム胴と圧胴の表面接触負荷と
ほぼ同じとなる程度である弾性体とを有することを特徴
とし、その目的とする処は前記従来の欠点を解消し、筋
目の発生を防止し印刷物の品質を向上させる印刷機を提
供しようとするものである。The present invention includes a bearer fixed to a rubber cylinder, an iron ring fixed in the axial end direction of the rubber cylinder and having the same outer diameter as the bearer, and an impression cylinder at a position corresponding to the iron ring in the axial direction. The outer diameter of the notch of the impression cylinder at the downstream end in the direction of rotation of the impression cylinder is the same as that of the bearer attached to the impression cylinder, and the outer diameter gradually increases as it goes upstream, and the amount of protrusion at the upstream end is the same as that of the bearer attached to the impression cylinder. It is characterized by having an elastic body whose contact load is approximately the same as the surface contact load of the rubber cylinder and the impression cylinder, and its purpose is to eliminate the above-mentioned conventional drawbacks and to prevent the occurrence of streaks. The aim is to provide a printing machine that prevents this problem and improves the quality of printed matter.

本考案は前記のように構成されており、前記ゴム胴と圧
胴の切欠部が出合い周胴の表面の接触がなくなり、それ
ぞれの回転負荷が減少した後前記鉄輪と弾性体が接触し
始め除々に接触量が増加し回転負荷が漸増し、切欠部が
終り周胴の表面が出合う時にはほぼゴム胴と圧胴の表面
接触時の回転負荷と同じ程度の負荷を与える。The present invention is constructed as described above, and after the notches of the rubber cylinder and the impression cylinder meet and the surfaces of the circumferential cylinder are no longer in contact with each other, and the rotational load of each is reduced, the iron ring and the elastic body gradually begin to come into contact with each other. The amount of contact increases and the rotational load gradually increases, and when the notch ends and the surfaces of the circumferential cylinder meet, a load approximately equal to the rotational load when the surfaces of the rubber cylinder and impression cylinder are in contact is applied.

このように本考案によると前記したように弾性体と鉄輪
が切欠部の出合い時から接触し始め、ゴム胴と圧胴間の
回転負荷を除々に増し、切欠部が終り側胴表面が接触す
る時の突然の負荷変動をほとんどなくすことができるの
でこの時のゴム胴の回転変動が防止でき、それによりゴ
ム胴と版胴間で転位中のインキが流れあるいは太りとい
う状態にならず筋目を防止できる。In this way, according to the present invention, as mentioned above, the elastic body and the iron ring begin to come into contact when they meet at the notch, and the rotational load between the rubber cylinder and the impression cylinder gradually increases until the notch ends and the surfaces of the side cylinders come into contact. It is possible to almost eliminate sudden load fluctuations during printing, which prevents fluctuations in the rotation of the rubber cylinder at this time, thereby preventing the ink that is dislocating between the blanket cylinder and the plate cylinder from flowing or thickening, thereby preventing streaks. can.

以下、第３図及び第４図に示す最も好ましい図示実施例
により本考案を詳細に説明する。The present invention will now be described in detail with reference to the most preferred embodiment shown in FIGS. 3 and 4.

図において前記と同じ符号は同じ部分を示す。In the figures, the same reference numerals as above indicate the same parts.

ゴム胴１のベアラ１０の外側にベアラ１０と同一外径を
有する鉄輪１１が固着されている。An iron ring 11 having the same outer diameter as the bearer 10 is fixed to the outside of the bearer 10 of the rubber cylinder 1.

１２は圧胴２のベアラであり、同ベアラ１２の外側に取
付部材１３がボルト１６により取付けられている。12 is a bearer of the impression cylinder 2, and a mounting member 13 is attached to the outside of the bearer 12 with bolts 16.

取付部材１３の圧胴２切欠部１８に対応する位置にボル
ト１７によりコンタクト板１４が取付けである。The contact plate 14 is attached to the attachment member 13 at a position corresponding to the notch 18 of the impression cylinder 2 with bolts 17.

同コンタクト板１４はその先端部にある程度の硬度を持
つゴム１５が固着されており、ゴム１５の先端は切欠部
１８の圧胴２回転方向下流端ではベアラ１２外径と同一
であり、回転方向上流側に行くに従かい除々にベアラ１
２外径より大きくなり、上流端で最大となっている。The contact plate 14 has a rubber 15 having a certain degree of hardness fixed to its tip, and the tip of the rubber 15 is the same as the outer diameter of the bearer 12 at the downstream end of the notch 18 in the direction of rotation of the impression cylinder 2. Bearer 1 gradually increases as you go upstream.
2 outer diameter, and is maximum at the upstream end.

又コンタクト板１４のゴム１５は前記鉄輪１１と接触す
る位置にある。Further, the rubber 15 of the contact plate 14 is in a position where it comes into contact with the iron ring 11.

本実施例は前記のように構成されており、前記切欠部の
出合いでゴム胴１と圧胴２の表面接触がたたれて回転負
荷が一端減少するが、この時に前記鉄輪１１とコンタク
ト板１４のゴム１５が接触し始め、更に回転するに従か
い接触による負荷が漸増し切欠部が終り、ゴム胴１と圧
胴２の表面が接触する時には前記負荷がほは゛側胴表面
接触時の負荷と同じになっている。This embodiment is constructed as described above, and the surface contact between the rubber cylinder 1 and the impression cylinder 2 is brought down when the notches meet, and the rotational load is temporarily reduced. At this time, the iron ring 11 and the contact plate 14 The rubber 15 of the rubber cylinder 1 and the impression cylinder 2 begin to come into contact with each other, and as the rubber cylinder 1 and the impression cylinder 2 rotate further, the load due to the contact gradually increases, and when the notch ends and the surfaces of the rubber cylinder 1 and the impression cylinder 2 come into contact, the load is almost the same as the load when the side cylinder surfaces are in contact. is the same as

このように本実施例によると前記のように構成された鉄
輪及びコンタクト板を有したことにより圧胴とゴム胴の
表面が接触する前に除々に両胸にかかる回転負荷が増し
、接触時に急激に回転負荷が増すことがなくなり、ゴム
胴の回転変動を押えることができる。According to this embodiment, by having the iron ring and the contact plate configured as described above, the rotational load applied to both breasts gradually increases before the surfaces of the impression cylinder and the rubber cylinder come into contact, and when they make contact, the rotational load is suddenly increased. This prevents the rotational load from increasing, and it is possible to suppress rotational fluctuations of the rubber cylinder.

従って、その時版胴とゴム胴の接触部にショックが伝達
してそこがズレるということはなく、同接触部での版胴
からゴム胴へのインク転移は正常に行われるので筋目の
発生を防止できる。Therefore, at that time, the shock is not transmitted to the contact area between the plate cylinder and the blanket cylinder, causing the contact area to become misaligned, and the ink transfer from the plate cylinder to the blanket cylinder at the contact area occurs normally, thus preventing the occurrence of streaks. can.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は従来の印刷機の概略構成を示す説明図、第２図
イは正常な転移をしたインクの網点を示す説明図、第２
図口は筋目部のインクの網点を示す説明図、第３図及び
第４図は本考案の実施例を示し、第３図はその正面図、
第４図は第３図のＡ−Ａ断面図である。 １・・・・・・ゴム胴、２・・・・・・圧胴、１０・・
・・・・ベアラ（ゴム胴）、１１・・・・・・鉄輪、１
２・・・・・・ベアラ（圧胴）、１４・・・・・・コン
タクト板（弾性体）、１８・・・・・・切欠部。Figure 1 is an explanatory diagram showing the general configuration of a conventional printing press, Figure 2 A is an explanatory diagram showing halftone dots of ink that has transferred normally,
The opening of the figure is an explanatory diagram showing ink dots in the streaks, Figures 3 and 4 show an embodiment of the present invention, and Figure 3 is a front view thereof.
FIG. 4 is a sectional view taken along the line AA in FIG. 3. 1...Rubber cylinder, 2...Impression cylinder, 10...
... Bearer (rubber body), 11 ... Iron ring, 1
2... Bearer (impression cylinder), 14... Contact plate (elastic body), 18... Notch.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] ゴム胴に固着されたベアラから同ゴム胴軸端方向に固着
され前記ベアラ外径と同一外径を有する鉄輪及び圧胴に
その軸方向位置が前記鉄輪に対応する位置に取付けられ
るとともに同圧胴の切欠部の圧胴回転方向下流端での外
径が圧胴に固着されたベアラと同一で上流側に行くにし
たがい外径が漸増し上流端での突出量は前記鉄輪との接
触負荷が前記ゴム胴と圧胴の表面接触負荷とばは゛同じ
となる程度である弾性体とを有することを特徴とする印
刷機。A bearer fixed to the rubber cylinder is fixed to the rubber cylinder in the axial end direction and has an outer diameter the same as the bearer, and an impression cylinder is attached at a position corresponding to the iron ring in the axial direction, and the same impression cylinder The outer diameter of the notch at the downstream end in the direction of rotation of the impression cylinder is the same as that of the bearer fixed to the impression cylinder, and the outer diameter increases gradually toward the upstream side, and the amount of protrusion at the upstream end is determined by the contact load with the iron ring. A printing machine characterized by having an elastic body such that the surface contact loads of the blanket cylinder and the impression cylinder are the same.