JP2008254264A - Gripper device in sheet-fed rotary press and manufacturing method thereof - Google Patents

Gripper device in sheet-fed rotary press and manufacturing method thereof Download PDF

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JP2008254264A
JP2008254264A JP2007097259A JP2007097259A JP2008254264A JP 2008254264 A JP2008254264 A JP 2008254264A JP 2007097259 A JP2007097259 A JP 2007097259A JP 2007097259 A JP2007097259 A JP 2007097259A JP 2008254264 A JP2008254264 A JP 2008254264A
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nail
sheet
claw
paper
protrusions
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Kazuhiko Kato
和彦 加藤
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Komori Corp
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Komori Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To prevent formation of an imprint of a projection on sheetlike matter, to prevent a fault in loading or trans-gripping in delivery equipment and also to prevent a fall of a commodity value of the sheetlike matter itself. <P>SOLUTION: Paper holding parts of projections 20 provided on the fore end side of a gripping side 16 of a gripper 13 which can be opened and closed in relation to a gripper pad 4, are formed to be larger than the paper holding parts of other projections 21. The gripper 13 is formed by a metal powder injection molding method. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、爪台とこの爪台に対して開閉する爪とによってシート状物をくわえて搬送する枚葉輪転印刷機における爪装置およびその製造方法に関するものである。   The present invention relates to a nail device in a sheet-fed rotary printing press that conveys a sheet-like material by a nail base and a nail that opens and closes with respect to the nail base, and a manufacturing method thereof.

枚葉輪転印刷機においては、紙を一枚ずつくわえて搬送するために開閉自在な爪とこの爪に対向する爪台とからなる爪装置が、回転胴の外周切欠きや排紙チェーンに支架された軸上に配設されている。この種の爪装置における爪は、一枚ずつ送られてくる紙を常に同じ位置でくわえる必要があり、仮に紙のくわえ位置がずれると、見当ずれと称する絵柄位置の誤差やばらつきが発生したり、ダブリと称して絵柄が二重に印刷されたりして、印刷品質を低下させる原因となる。このために、爪と爪台との紙をくわえるそれぞれのくわえ面に、紙との摩擦力を増大させるための表面加工が施されている。   In a sheet-fed rotary printing press, a claw device comprising a claw that can be freely opened and closed to transport the paper one sheet at a time and a claw base that faces the claw is supported by a peripheral notch of the rotary drum and a paper discharge chain. Arranged on the shaft. The nail in this type of nail device must always hold the paper that is fed one by one at the same position, and if the paper holding position is shifted, an error or variation in the pattern position called misregistration may occur. The pattern is printed twice as a double, which causes a decrease in print quality. For this reason, surface processing for increasing the frictional force with the paper is applied to each holding surface that holds the paper of the claw and the claw base.

例えば、爪と爪台の紙をくわえるそれぞれのくわえ面に多数のセレーションを設けたものがある（特許文献１参照）。また、爪台のくわえ面に電気メッキ層の溶着材層を形成し、この溶着材層中に超砥粒を略半分だけ埋設し、この超砥粒によって爪台のくわえ面のくわえ力を増大させたものもある（例えば、特許文献２参照）。また、爪と爪台のくわえ面にセレーション等の突起を加工したものや、タングステンカーバイトの溶射等によってくわえ面に梨地加工を施したものもある。
実開昭５７−１９１７４５号公報 実開昭６３−４７１３３号公報 For example, there is one in which a large number of serrations are provided on each holding surface of the nail and nail base paper (see Patent Document 1). Also, a welding material layer of electroplating layer is formed on the holding surface of the nail base, and approximately half of the superabrasive grains are embedded in this welding material layer, and this superabrasive grain increases the holding force of the holding surface of the nail base. Some have been made (for example, see Patent Document 2). In addition, there are those in which protrusions such as serrations are processed on the holding surface of the nail and the claw base, and those in which the holding surface is processed by thermal spraying of tungsten carbide or the like.
Japanese Utility Model Publication No. 57-191745 Japanese Utility Model Publication No. 63-47133

上述した従来の枚葉輪転印刷機における爪装置においては、搬送する紙１２の厚みｔ１が比較的厚い厚紙の場合は、図７（Ａ）に示すように、爪１３のくわえ面１６に形成したすべての突起２０，２１が紙１２の全体に均一に食い込む。一方、搬送する紙１２の厚みｔ２が比較的薄い薄紙の場合は、同図（Ｂ）に示すように、爪１３のくわえ面１６が傾斜した状態で紙１２をくわえるため、紙１２をくわえる力が爪１３の先端部に集中する。このため、爪１３の先端側に設けた突起２０による紙１２に対する押付力が、他の位置に設けた突起２１による押付力よりも大きく作用するため、突起２０によってシート状物１２の一部に突起跡（くわえ跡）が形成されることがある。このように、紙１２の一部に突起跡が形成されると、排紙装置において突起跡どうしが干渉し合い積載される紙が揃わないといった問題や、紙自体の商品価値が低下するといった問題もあった。また、突起の一部が紙に深く食い込むため、この深く食い込んだ部位から紙が折れ曲がったり反り返ったりすることにより、くわえ替え不良が発生するおそれもあった。また、爪と爪台のそれぞれのくわえ面に爪チップと爪台チップを設けるものでは、２部材を各々に作成した後に２部材を一体化させる構造であるため、加工工数や一体化させるための工数が増加するという問題があった。   In the nail device in the conventional sheet-fed rotary printing press described above, when the thickness t1 of the paper 12 to be conveyed is relatively thick, it is formed on the holding surface 16 of the nail 13 as shown in FIG. All the protrusions 20 and 21 bite into the entire paper 12 uniformly. On the other hand, in the case where the thickness t2 of the paper 12 to be conveyed is relatively thin, the paper 12 is held with the gripping surface 16 of the claw 13 inclined as shown in FIG. Concentrate on the tip of the claw 13. For this reason, the pressing force against the paper 12 by the projections 20 provided on the tip side of the claw 13 acts more than the pressing force by the projections 21 provided at other positions. Protrusion traces may be formed. As described above, when protrusion marks are formed on a part of the paper 12, the protrusion marks interfere with each other in the paper discharge device, and the stacked paper does not align, or the commercial value of the paper itself decreases. There was also. Further, since a part of the protrusion deeply digs into the paper, the paper may be bent or warped from the deeply digged portion, which may cause a defective replacement. In addition, in the case where the nail tip and the nail base chip are provided on the respective holding surfaces of the nail and the nail base, the structure is such that the two members are integrated after the two members are formed respectively. There was a problem that man-hours increased.

本発明は上記した従来の問題に鑑みなされたものであり、その目的とするところは、シート状物に突起跡が形成されないようにし、排紙装置における積載不良やくわえ替え不良を防止し、シート状物自体の商品価値も低下させるようなことがない枚葉輪転印刷機における爪装置およびその製造方法を提供するところにある。   The present invention has been made in view of the above-described conventional problems. The object of the present invention is to prevent the formation of protrusion traces on the sheet-like material, to prevent stacking defects and poor replacement in the sheet discharge device, The object of the present invention is to provide a nail device in a sheet-fed rotary printing press and a method for manufacturing the same which does not reduce the commercial value of the product itself.

この目的を達成するために、請求項１に係る発明は、爪台と爪とによってシート状物をくわえる枚葉輪転印刷機の爪装置において、前記爪または爪台の少なくともいずれか一方のくわえ面に多数の突起をに設け、これらの突起のうち少なくとも爪の先端側に位置する突起の一部のシート状物保持部を他に位置する突起のシート状物保持部よりも大きく形成したものである。   In order to achieve this object, the invention according to claim 1 is directed to a nail device for a sheet-fed rotary printing press in which a sheet-like material is added by a nail base and a nail, and the holding surface of at least one of the nail or the nail base. A plurality of projections are provided on the projection, and at least some of the projections located on the tip side of the claw are formed to be larger than the other projection-like sheet holding portions. is there.

請求項２に係る発明は、請求項１に係る発明において、爪の先端側に位置する突起のシート状物保持部は、爪の先端側に位置する前記突起の一部のシート状物保持部と略同じ大きさに形成したものである。   The invention according to claim 2 is the invention according to claim 1, wherein the sheet-like material holding portion of the protrusion located on the tip side of the nail is a sheet-like material holding portion of a part of the protrusion located on the tip side of the nail. And are formed in substantially the same size.

請求項３に係る発明は、爪台と爪とによってシート状物をくわえる枚葉輪転印刷機の爪装置において、前記爪または爪台の少なくともいずれか一方のくわえ面に多数の突起をに設け、これらの突起のうち少なくとも爪の先端側に位置する突起の一部のシート状物保持部に対して他に位置する突起のシート状物保持部は、大きいシート状物保持部と小さいシート状物保持部とを有するものである。   The invention according to claim 3 is a nail device of a sheet-fed rotary printing machine in which a sheet-like material is added by a nail base and a nail, and a plurality of protrusions are provided on at least one holding surface of the nail or the nail base, Among these protrusions, at least a part of the sheet-like object holding part of the protrusion located on the distal end side of the nail is a sheet-like object holding part of the protrusion that is positioned on the other side. And a holding part.

請求項４に係る発明は、請求項１ないし３に係る発明において、前記突起が設けられた前記爪および爪台を金属粉末射出成形法によって形成したものである。   The invention according to claim 4 is the invention according to claims 1 to 3, wherein the claw and claw base provided with the protrusion are formed by a metal powder injection molding method.

本発明によれば、爪または爪台の少なくともいずれか一方のくわえ面に設けた多数の突起によって爪によるくわえ力が増大することにより、一枚ずつ送られてくる紙が常に同じ位置でくわえられ紙のくわえ位置がずれないため、見当ずれやダブリが発生するようなことがないから印刷品質を向上させることができる。また、仮に厚みが比較的薄いシート状物をくわえる場合、くわえが集中する爪の先端側に位置する突起のシート状物保持部を他に位置する突起のシート状物保持部よりも大きく形成していることにより、爪の先端側に位置する突起によるシート状物に対する押付力の集中を緩和することができる。したがって、突起によりシート状物上に形成される突起跡を低減することができるため、排紙装置における積載不良やくわえ替え不良を防止することができ、シート状物自体の商品価値を低下させるようなこともない。   According to the present invention, the holding force by the nail is increased by the large number of protrusions provided on the holding surface of at least one of the nail and the nail base, so that the sheets fed one by one are always held at the same position. Since the holding position of the paper does not shift, there is no occurrence of misregistration or double printing, so that the printing quality can be improved. Also, if a sheet-like object having a relatively small thickness is added, the protrusion-like sheet-like object holding part located on the tip side of the nail where the holding is concentrated is formed larger than the other sheet-like object holding parts of the protrusions. Therefore, the concentration of the pressing force on the sheet-like material by the protrusions located on the tip side of the nail can be reduced. Accordingly, the protrusion traces formed on the sheet-like object by the protrusions can be reduced, so that a stacking failure and a holding failure in the paper discharge device can be prevented, and the commercial value of the sheet-like object itself is lowered. There is nothing wrong.

請求項４に係る発明によれば、また、切削や研磨等の加工が不要になるため加工工数を削減でき、かつ爪と突起とを一体化させるための工数を削減することができるから、製造コストを低減することができる。また、金属粉末射出成形法による高圧での射出成形によって、爪に形成した突起の耐久性を向上させることができる。   According to the invention of claim 4, since processing such as cutting and polishing becomes unnecessary, the number of processing steps can be reduced, and the number of steps for integrating the claws and the protrusions can be reduced. Cost can be reduced. Moreover, durability of the protrusion formed on the nail can be improved by injection molding at a high pressure by a metal powder injection molding method.

以下、本発明の実施の形態を図に基づいて説明する。図１は本発明に係る枚葉輪転印刷機における爪装置の爪が設けられた圧胴の一部を示す側面図、図２は同じく爪を示し、同図（Ａ）は側面図、同図（Ｂ）は外観斜視図、同図（Ｃ）は一部を破断して示す外観斜視図、図３は図２（Ａ）におけるIII 矢視図、図４は同じく製造方法の工程図である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a part of an impression cylinder provided with a nail of a nail device in a sheet-fed rotary printing press according to the present invention, FIG. 2 shows the same nail, and FIG. 1 (A) is a side view. (B) is an external perspective view, FIG. 3 (C) is an external perspective view with a part broken away, FIG. 3 is a view taken in the direction of arrow III in FIG. 2 (A), and FIG. .

図１に符号１で示す圧胴の外周部に設けられた切欠き２内には、圧胴１の胴軸方向に延在する爪軸３が図示を省略した軸受によって回動自在に軸架されている。切欠き２の壁面の外周側端部には、圧胴１の胴軸方向に延在する長尺状に形成された爪台４が複数個のボルト５によって固定されている。爪軸３上には爪台４とともに形成される複数個のくわえ替え装置６が軸方向に並設されている。すなわち、爪軸３には、ばね受け７ａとストッパ受け７ｂとを有するブラケット７がボルト８によって割締め固定されている。   In a notch 2 provided on the outer periphery of the impression cylinder shown by reference numeral 1 in FIG. 1, a claw shaft 3 extending in the cylinder axis direction of the impression cylinder 1 is rotatably mounted by a bearing not shown. Has been. A claw base 4 formed in an elongated shape extending in the cylinder axis direction of the impression cylinder 1 is fixed to a peripheral end portion of the wall surface of the notch 2 by a plurality of bolts 5. On the claw shaft 3, a plurality of holding devices 6 formed together with the claw base 4 are arranged in parallel in the axial direction. That is, the bracket 7 having the spring receiver 7 a and the stopper receiver 7 b is fixed to the claw shaft 3 by the bolts 8.

９は爪ホルダーであって、ばね受け７ａと対向するばね受け９ａとストッパ受け７ａと対向し進退調整自在なストッパ１０とを備え、ブラケット７に隣接し軸方向への移動が規制された状態で爪軸３に回動自在に軸装されている。ばね受け７ａとばね受け９ａとの間には、これらを互いに離間させる方向の回動力を爪ホルダー９に付与する爪ばね１１が弾装されており、その弾発力による爪ホルダー９の回動限はストッパ１０によって規制されている。爪ホルダー９の遊端部には、爪台４とでシート状物としての紙１２をくわえる爪１３がねじ止めされており、胴端部の図示しないカム機構で爪軸３を所定角度ずつ往復回動させることにより、爪ばね１１を介し爪ホルダー９が回動して爪１３が爪台４に対して開閉するように構成されている。紙１２をくわえた圧胴１は図中矢印Ａ方向に回転して紙１２を搬送する。以上説明した圧胴１に設けられた爪装置については、従来から広く知られている枚葉輪転印刷機の爪装置と格別変わるところはない。   A claw holder 9 includes a spring receiver 9a facing the spring receiver 7a and a stopper 10 facing the stopper receiver 7a and adjustable in advance and retreat, and is adjacent to the bracket 7 and is restricted from moving in the axial direction. The claw shaft 3 is rotatably mounted. A claw spring 11 is provided between the spring receiver 7a and the spring receiver 9a so as to give the claw holder 9 a rotational force in a direction in which they are separated from each other, and the claw holder 9 is rotated by its elastic force. The limit is regulated by the stopper 10. At the free end of the claw holder 9, a claw 13 for holding the paper 12 as a sheet-like material is screwed to the claw base 4, and the claw shaft 3 is reciprocated by a predetermined angle by a cam mechanism (not shown) at the barrel end. By rotating, the claw holder 9 is rotated via the claw spring 11 so that the claw 13 is opened and closed with respect to the claw base 4. The impression cylinder 1 including the paper 12 rotates in the direction of arrow A in the drawing and conveys the paper 12. About the nail | claw apparatus provided in the impression cylinder 1 demonstrated above, there is no place especially different from the nail | claw apparatus of the sheet-fed rotary printing machine known conventionally.

本発明の特徴とするところは、金属粉末射出成形法によって爪１３のくわえ面１６に多数の突起２０，２１を形成した点にある。以下、図２ないし図４を用いてこれを説明する。図２において、爪１３は支持部１４とこの支持部１４の上部に一体に設けられたくわえ部１５とによって略逆Ｌ字状に形成されている。くわえ部１５は、爪１３が設けられた圧胴１とこの圧胴１と対向する渡し胴（図示せず）との間で紙１２をくわえ替えるとき、先端部が渡し胴に干渉しないように、下面に設けたくわえ面１６と上面１７との間に角度αが形成されるように、側面視において先端に向かって（矢印Ｂ方向）先細状に形成されている。くわえ部１５の上面１７には、底面１８ａがくわえ面１６と平行で平面視矩形状に形成された凹部１８が設けられており、上面１７の両側部にはリブ１７ａ，１７ａが形成されている。   A feature of the present invention is that a large number of protrusions 20 and 21 are formed on the holding surface 16 of the claw 13 by a metal powder injection molding method. Hereinafter, this will be described with reference to FIGS. In FIG. 2, the claw 13 is formed in a substantially inverted L shape by a support portion 14 and a holding portion 15 provided integrally with the upper portion of the support portion 14. The holding portion 15 is configured so that the front end portion does not interfere with the transfer drum when the paper 12 is changed between the pressure drum 1 provided with the claw 13 and a transfer drum (not shown) opposed to the pressure drum 1. In addition, it is formed in a tapered shape toward the tip (in the direction of arrow B) in a side view so that an angle α is formed between the holding surface 16 provided on the lower surface and the upper surface 17. The upper surface 17 of the holding portion 15 is provided with a concave portion 18 having a bottom surface 18a parallel to the holding surface 16 and formed in a rectangular shape in plan view, and ribs 17a and 17a are formed on both sides of the upper surface 17. .

爪１３のくわえ面１６には、図３に示すように表面が菱形に形成された多数の突起２０，２１が互いに等間隔おいて一体に設けられている。これらの突起２０，２１のうち、爪１３のくわえ部１５の先端側（矢印Ｂ方向）に位置する一列に配設された複数の突起２０のシート状物保持部としての紙保持部（表面積）が、他の位置に設けられた多数の突起２１の紙保持部よりも大きく形成されている点に特徴を有する。   On the holding surface 16 of the claw 13, as shown in FIG. 3, a large number of protrusions 20 and 21 whose surfaces are formed in a diamond shape are integrally provided at equal intervals. Among these protrusions 20, 21, a paper holding part (surface area) as a sheet-like object holding part of a plurality of protrusions 20 arranged in a row located on the distal end side (arrow B direction) of the holding part 15 of the claw 13. However, it is characterized in that it is formed to be larger than the paper holding portions of a large number of protrusions 21 provided at other positions.

次に、図４を用いてこのような形状を呈する爪１３の製造方法について説明する。先ず、爪１３の材料となる金属の粉末と粘結材として機能するプラスチック（バインダー）とを混合して粘土状とする。次いで、この混合体を造粒工程においてかき混ぜ、射出成形機と金型とを用いて成形品を加工する。加工した成形品を脱脂工程において炉に入れて加熱し成形品からプラスチックを除去する。さらに、焼成工程において脱脂工程よりも高い温度によって成形品を加熱し焼結させ、仕上げ工程によって外観の精度を向上させる。   Next, the manufacturing method of the nail | claw 13 which exhibits such a shape is demonstrated using FIG. First, a metal powder as a material for the claws 13 and a plastic (binder) functioning as a binder are mixed to form a clay. Next, the mixture is agitated in a granulation step, and a molded product is processed using an injection molding machine and a mold. The processed molded product is put into a furnace in a degreasing process and heated to remove the plastic from the molded product. Furthermore, the molded product is heated and sintered at a temperature higher than that in the degreasing process in the firing process, and the accuracy of appearance is improved by the finishing process.

このように、爪１３のくわえ面１６に一体に設けた多数の突起１９，２０によって爪１３によるくわえ力が増大することにより、一枚ずつ送られてくる紙１２が常に同じ位置でくわえられ紙１２のくわえ位置がずれないため、見当ずれやダブリが発生するようなことがないから印刷品質を向上させることができる。また、爪１３を金属粉末射出成形法によって形成したことにより、切削や研磨等の加工が不要になるため、加工工数が削減されるから製造コストの低減を図ることができる。また、金属粉末射出成形法による高圧での射出成形によって、爪１３の突起２０，２１の耐久性を向上させることができる。また、爪１３と突起１９，２０とを金属粉末射出成形法によって一体形成することができるため、突起１９，２０を加工する加工工数や爪１３と突起１９，２０とを一体化させるための工数を削減することができる。   In this way, the holding force by the claw 13 is increased by the large number of protrusions 19 and 20 integrally provided on the holding surface 16 of the claw 13, so that the paper 12 fed one by one is always held at the same position. Since the 12 holding positions do not deviate, there is no occurrence of misregistration or duplication, so that the print quality can be improved. Moreover, since the nail | claw 13 was formed by the metal powder injection molding method, since processings, such as cutting and grinding | polishing, become unnecessary, a processing man-hour can be reduced and it can aim at reduction of manufacturing cost. Moreover, durability of the protrusions 20 and 21 of the claw 13 can be improved by injection molding at a high pressure by a metal powder injection molding method. Moreover, since the nail | claw 13 and protrusion 19 and 20 can be integrally formed by the metal powder injection molding method, the man-hour for processing the protrusion 19 and 20 and the process for integrating the nail | claw 13 and protrusion 19 and 20 are integrated. Can be reduced.

また、爪１３のくわえ面１６と反対側の上面１７にくわえ面１６と平行な底面１８ａを有する凹部１８を設けたことにより、金属粉末射出成形法で形成する際に、爪１３のくわえ面１６にひけが発生するようなことがないから、くわえ面１６に一体に設けた多数の突起２０，２１の高さにばらつきが発生することなく均一の高さに形成される。このため、安定したくわえ力が得られるだけではなく、くわえ力が一部の突起に偏ることによって爪１３にくわえられる紙１２に突起跡が形成されることや紙１２に孔が形成されるようなこともない。   Further, by providing the concave portion 18 having the bottom surface 18a parallel to the holding surface 16 on the upper surface 17 opposite to the holding surface 16 of the claw 13, when the metal powder injection molding method is used, the holding surface 16 of the claw 13 is provided. Since there is no occurrence of sink marks, the heights of the numerous protrusions 20 and 21 provided integrally on the holding surface 16 are formed to have a uniform height without variation. For this reason, not only a stable holding force can be obtained, but also when the holding force is biased to a part of the protrusions, projection marks are formed on the paper 12 held on the claw 13 and holes are formed in the paper 12. There is nothing wrong.

また、仮に爪１３と爪台４とによって厚みが比較的薄い紙をくわえる場合、くわえが集中する爪１３のくわえ部１５の先端側に位置する突起２０の紙保持部を他の位置に設けられた突起２１の紙保持部よりも大きく形成していることにより、くわえ部１５の先端側に位置する突起２０による紙１２に対する押付力の集中を緩和することができる。このため、突起２０によって紙１２に形成される突起跡を低減することができるため、排紙装置におけ突起跡どうしの干渉に起因する積載不良やくわえ替え不良を防止することができ、紙自体の商品価値を低下させるようなこともない。   In addition, when a relatively thin paper is added by the claw 13 and the claw base 4, a paper holding portion of the protrusion 20 located on the front end side of the holding portion 15 of the claw 13 where the holding is concentrated is provided at another position. By forming the protrusion 21 larger than the paper holding portion, the concentration of the pressing force on the paper 12 by the protrusion 20 positioned on the leading end side of the holding portion 15 can be reduced. For this reason, since the protrusion trace formed on the paper 12 by the protrusion 20 can be reduced, it is possible to prevent a stacking defect and a holding defect due to interference between the protrusion traces in the paper discharge device, and the paper itself. There is no such thing as reducing the value of the product.

図５は本発明の第２の実施の形態を示す図２（Ａ）におけるIII 矢視図である。この第２の実施の形態においては、同図に示すように、爪１３のくわえ部１５の先端側に位置する突起２０を、紙保持部の大きい突起２０ａと、他に位置する突起２１の紙保持部と同一に形成した突起２０ｂとによって構成したものである。すなわち、突起２０ｂの紙保持部を、突起２０ａの紙保持部よりも小さく形成し、くわえ部１５の先端側に位置する突起２０による紙１２に対する押圧力を増加させたものである。   FIG. 5 is a view taken in the direction of arrow III in FIG. 2 (A) showing the second embodiment of the present invention. In the second embodiment, as shown in the figure, the protrusion 20 located on the front end side of the holding portion 15 of the claw 13 is replaced with a protrusion 20a having a large paper holding portion and a paper having a protrusion 21 located elsewhere. The projection 20b is formed in the same manner as the holding portion. That is, the paper holding portion of the protrusion 20b is formed smaller than the paper holding portion of the protrusion 20a, and the pressing force against the paper 12 by the protrusion 20 located on the front end side of the holding portion 15 is increased.

この第２の実施の形態においては、薄紙をくわえるときくわえ部１５の先端側に位置する突起２０による紙１２に対する押圧力が不足する場合、排紙装置における積載不良やくわえ替え不良が起きない程度、および紙自体の商品価値を低下させるようなことがない程度に、突起２０のうちの一部の突起２０ｂの紙保持部を、他に位置する突起２１の紙保持部と同一に形成するものである。   In the second embodiment, when the thin paper is added, if the pressing force against the paper 12 by the projection 20 located on the leading end side of the holding portion 15 is insufficient, the stacking failure or the holding failure in the paper discharge device does not occur. In addition, the paper holding portions of some of the protrusions 20b are formed in the same manner as the paper holding portions of the other protrusions 21 so as not to reduce the commercial value of the paper itself. It is.

図６は本発明の第３の実施の形態を示す図２（Ａ）におけるIII 矢視図である。この第３の実施の形態においては、同図に示すように、他に位置する突起２１のうちの一つの突起２１ａの紙保持部を、他に位置する突起２１ｂの紙保持部およびくわえ部１５の先端側に位置する突起２０の紙保持部よりも大きく形成したものである。すなわち、突起２０，２１のうち少なくとも爪１３の先端側に位置する突起２０の紙保持部に対して他に位置する突起２１の紙保持部は、大きい紙保持部と小さい紙保持部とを有する   FIG. 6 is a view taken in the direction of arrow III in FIG. 2 (A) showing the third embodiment of the present invention. In the third embodiment, as shown in the figure, the paper holding part of one protrusion 21a among the other protrusions 21 is replaced with the paper holding part and holding part 15 of the other protrusion 21b. Is formed larger than the paper holding portion of the protrusion 20 located on the front end side. That is, among the protrusions 20 and 21, the paper holding part of the protrusion 21 located at the other side of the paper holding part of the protrusion 20 located at least on the tip side of the claw 13 has a large paper holding part and a small paper holding part.

この第３の実施の形態においては、他に位置する突起２１による紙１２に対する押圧力を必要な押圧力以下に低下させない程度に、紙保持部の大きい突起２１ａを設けるものである。なお、この第３の実施の形態においては、突起２１ａの紙保持部を突起２０の紙保持部よりも大きく形成したが、少なくとも突起２１の紙保持部よりも大きく形成すればよい。また、突起２１ａを一個設けた例を説明したが、必要に応じて二個以上設けるようにしてもよい。   In the third embodiment, the protrusion 21a having a large paper holding portion is provided to such an extent that the pressing force against the paper 12 by the protrusions 21 located elsewhere is not reduced below a required pressing force. In the third embodiment, the paper holding portion of the protrusion 21 a is formed larger than the paper holding portion of the protrusion 20, but it may be formed at least larger than the paper holding portion of the protrusion 21. Moreover, although the example which provided one protrusion 21a was demonstrated, you may make it provide two or more as needed.

なお、本実施の形態においては、圧胴に設けられた爪について説明したが、渡し胴や排紙チェーンあるいはスイング装置等に設けられた爪にも適用してもよい。また、紙保持部が大きい突起２０を爪１３のくわえ部１５の先端側の一列のみに設けた例を説明したが、必要に応じて二列以上としてもよい。また、紙保持部が異なる突起を二種類としたが、三種類以上としてもよい。また、爪１３のくわえ面１６に突起２０，２１を設けた例を説明したが、爪台４のくわえ面に突起を設けてもよく、爪１３と爪台４の両方のくわえ面に突起を設けてよい。また、シート状物を紙１２としたが、フィルム状のシート材としてもよい。   In the present embodiment, the claw provided on the impression cylinder has been described, but the present invention may also be applied to a claw provided on a transfer cylinder, a paper discharge chain, a swing device, or the like. Moreover, although the example which provided the protrusion 20 with a large paper holding part only in one row | line | column of the front end side of the holding part 15 of the nail | claw 13, it is good also as two or more rows as needed. Further, although two types of protrusions with different paper holding portions are used, three or more types may be used. Further, the example in which the protrusions 20 and 21 are provided on the holding surface 16 of the claw 13 has been described, but the protrusion may be provided on the holding surface of the claw base 4, and the protrusions may be provided on both the holding surfaces of the claw 13 and the claw base 4. May be provided. Further, although the sheet-like material is the paper 12, it may be a film-like sheet material.

本発明に係る枚葉輪転印刷機における爪装置の爪が設けられた圧胴の一部を示す側面図である。It is a side view which shows a part of impression cylinder provided with the nail | claw of the nail | claw apparatus in the sheet-fed rotary printing press which concerns on this invention. 本発明に係る枚葉輪転印刷機における爪装置の爪を示し、同図（Ａ）は側面図、同図（Ｂ）は外観斜視図、同図（Ｃ）は一部を破断して示す外観斜視図である。The nail | claw of the nail | claw apparatus in the sheet-fed rotary printing press which concerns on this invention is shown, The same figure (A) is a side view, The same figure (B) is an external appearance perspective view, The same figure (C) is a partially broken external appearance. It is a perspective view. 図２（Ａ）におけるIII 矢視図である。It is the III arrow directional view in Drawing 2 (A). 本発明に係る枚葉輪転印刷機における爪装置の爪の製造方法を示す工程図である。It is process drawing which shows the manufacturing method of the nail | claw of the nail | claw apparatus in the sheet-fed rotary printing press which concerns on this invention. 本発明の第２の実施の形態を示す図２（Ａ）におけるIII 矢視図である。It is the III arrow directional view in FIG. 2 (A) which shows the 2nd Embodiment of this invention. 本発明の第３の実施の形態を示す図２（Ａ）におけるIII 矢視図である。It is the III arrow directional view in FIG. 2 (A) which shows the 3rd Embodiment of this invention. 従来の枚葉輪転印刷機における爪装置を拡大して示す側面図で、同図（Ａ）は厚紙をくわえている状態を示し、同図（Ｂ）は薄紙をくわえている状態を示す。The side view which expands and shows the nail | claw apparatus in the conventional sheet-fed rotary printing machine, the figure (A) shows the state which has added the thick paper, and the figure (B) shows the state which has added the thin paper.

符号の説明Explanation of symbols

１…圧胴、４…爪台、１２…紙（シート状物）、１３…爪、１５…くわえ部、１６…くわえ面、２０，２０ａ，２０ｂ，２１，２１ａ，２１ｂ…突起。   DESCRIPTION OF SYMBOLS 1 ... Impression cylinder, 4 ... Claw stand, 12 ... Paper (sheet-like material), 13 ... Claw, 15 ... Holding part, 16 ... Holding surface, 20, 20a, 20b, 21, 21a, 21b ... Protrusion.

Claims (4)

爪台と爪とによってシート状物をくわえる枚葉輪転印刷機の爪装置において、前記爪または爪台の少なくともいずれか一方のくわえ面に多数の突起をに設け、これらの突起のうち少なくとも爪の先端側に位置する突起の一部のシート状物保持部を他に位置する突起のシート状物保持部よりも大きく形成したことを特徴とする枚葉輪転印刷機における爪装置。   In a nail device of a sheet-fed rotary printing machine in which a sheet-like material is added by a nail base and a nail, a plurality of protrusions are provided on at least one of the nail surfaces of the nail or the nail base, and at least a nail of these protrusions is provided. A nail device in a sheet-fed rotary printing press, wherein a sheet-like material holding part of a part of a protrusion located on a front end side is formed larger than a sheet-like material holding part of a protrusion located elsewhere. 爪の先端側に位置する突起のシート状物保持部は、爪の先端側に位置する前記突起の一部のシート状物保持部と略同じ大きさに形成したことを特徴とする請求項１記載の枚葉輪転印刷機における爪装置。   2. The sheet-like object holding portion of the protrusion located on the tip end side of the nail is formed to be substantially the same size as a part of the sheet-like object holding portion of the protrusion located on the tip end side of the nail. A nail device in the sheet-fed rotary printing press described. 爪台と爪とによってシート状物をくわえる枚葉輪転印刷機の爪装置において、前記爪または爪台の少なくともいずれか一方のくわえ面に多数の突起をに設け、これらの突起のうち少なくとも爪の先端側に位置する突起の一部のシート状物保持部に対して他に位置する突起のシート状物保持部は、大きいシート状物保持部と小さいシート状物保持部とを有することを特徴とする枚葉輪転印刷機における爪装置。   In a nail device of a sheet-fed rotary printing machine in which a sheet-like material is added by a nail base and a nail, a plurality of protrusions are provided on at least one of the nail surfaces of the nail or the nail base, and at least a nail of these protrusions is provided. The sheet-like material holding part of the protrusions located on the other side of the sheet-like material holding part of the protrusions located on the front end side has a large sheet-like material holding part and a small sheet-like material holding part. A nail device in a sheet-fed rotary printing press. 前記突起が設けられた前記爪および爪台を金属粉末射出成形法によって形成したことを特徴とする請求項１ないし３のいずれか一項記載の枚葉輪転印刷機における爪装置の製造方法。   The method for manufacturing a nail device in a sheet-fed rotary printing press according to any one of claims 1 to 3, wherein the nail and nail base provided with the protrusions are formed by a metal powder injection molding method.
JP2007097259A 2007-04-03 2007-04-03 Gripper device in sheet-fed rotary press and manufacturing method thereof Pending JP2008254264A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108312705A (en) * 2018-02-06 2018-07-24 青岛金运来彩印有限公司 Sheet offset press collection bite-block and preparation method thereof

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JPS60157234A (en) * 1983-12-05 1985-08-17 ゼネラル・エレクトリツク・カンパニイ Semiconductor wafer having semiconductor element electrically separated
JPS62298479A (en) * 1986-05-31 1987-12-25 エム・ア−・エヌ−ロ−ラント・ドルツクマシ−ネン・アクチエンゲゼルシヤフト Sheet gripper for sheet processing machine and manufacture of holding surface having molding structure of sheet gripperpad or similar gripper mechanism
JPS6367150A (en) * 1986-09-10 1988-03-25 Dainippon Printing Co Ltd Gripping jig for feeding printing paper
JPH01259948A (en) * 1987-11-19 1989-10-17 Man Roland Druckmas Ag Gripper pawl of sheet gripper device
JP2006076304A (en) * 2004-09-08 2006-03-23 Heidelberger Druckmas Ag Printing sheet gripper (lead edge clamp)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60157234A (en) * 1983-12-05 1985-08-17 ゼネラル・エレクトリツク・カンパニイ Semiconductor wafer having semiconductor element electrically separated
JPS62298479A (en) * 1986-05-31 1987-12-25 エム・ア−・エヌ−ロ−ラント・ドルツクマシ−ネン・アクチエンゲゼルシヤフト Sheet gripper for sheet processing machine and manufacture of holding surface having molding structure of sheet gripperpad or similar gripper mechanism
JPS6367150A (en) * 1986-09-10 1988-03-25 Dainippon Printing Co Ltd Gripping jig for feeding printing paper
JPH01259948A (en) * 1987-11-19 1989-10-17 Man Roland Druckmas Ag Gripper pawl of sheet gripper device
JP2006076304A (en) * 2004-09-08 2006-03-23 Heidelberger Druckmas Ag Printing sheet gripper (lead edge clamp)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108312705A (en) * 2018-02-06 2018-07-24 青岛金运来彩印有限公司 Sheet offset press collection bite-block and preparation method thereof

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