JP2002067275A - Method and apparatus for inspecting signature - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rapidly and certainly perform the adjustment of the folding operation timing of a folder, the replacement of a part, the sampling work of inferior goods or the like by detecting the generation of corner folding, rupture or the like easy to generate at the end part of a signature in a line for feeding the signature. SOLUTION: In a signature inspection method for inspecting deficiency such as the corner folding, rupture or the like of the end surface part of the signature subjected to folding processing by a folder to be fed, pressure is applied to both side edge parts of the signature after both side edge parts of the signature are arranged to obtain the pressure distribution from the signature in a signature feed direction and the obtained pressure distribution is analyzed to judge the presence of the deficiency. A folding deficiency detector using this folding deficiency detection method is provided.

Description

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

【０００１】[0001]

【発明の属する技術分野】本発明は、印刷用紙に画像を
形成した印刷物の折り丁の角折れ・破れなどの不良を検
査する検査方法、及びその検査装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inspection method and an inspection apparatus for inspecting a printed matter having an image formed on a printing sheet for a defect such as a bent or broken signature.

【０００２】[0002]

【従来の技術】印刷用紙の片面あるいは両面に画像を転
写した印刷物を折り、断裁し、所望の形状に仕上げる印
刷機には、例えばオフセット輪転印刷機、グラビア印刷
機などがあり、新聞、ちらし、書籍といった様々な印刷
物を生産している。これらの印刷機では、後段に併設し
た印刷シート折り機によって、連続的に所定のおり形状
に折り加工して、印刷物の折り丁を製造している。2. Description of the Related Art Printers that fold and cut a printed material having an image transferred on one or both sides of a printing paper and finish it in a desired shape include, for example, an offset rotary printing press and a gravure printing press, such as newspapers, flyers, It produces various printed materials such as books. In these printing presses, a printed sheet folding machine provided at the subsequent stage continuously performs folding processing into a predetermined cage shape to produce signatures of printed matter.

【０００３】この印刷物の品質を考えた場合、印刷され
た画像の品質はもとより、印刷物の折り品質も、その印
刷物全体の品質を決める重大な要素である。例えば、製
本の場合、綴じ込み用印刷物の角が折れた状態で本とな
り、最後の断裁工程で断裁されずに、余分な用紙余白部
が残ってしまうもの、あるいは、ページの一部が破れ、
そこにあるべき記事が読めないものが生じ、印刷された
画像がきれいな印刷物でも、最終製品の印刷物としては
不良品となってしまう。When considering the quality of the printed matter, not only the quality of the printed image but also the folding quality of the printed matter is an important factor that determines the quality of the entire printed matter. For example, in the case of bookbinding, the bound printed matter becomes a book with the corners broken, and is not cut in the last cutting step, and an extra paper margin remains, or a part of the page is torn,
In some cases, articles that should be there cannot be read, and even a printed product with a beautiful printed image is a defective product as a printed product of the final product.

【０００４】従来、この印刷物の折り丁の不良の発見
は、印刷オペレータが印刷された折り丁の抜き取り検査
を、定期的に行っているのが一般的であった。しかしな
がら、折り丁の不良は突発的に発生するものであり、定
期的な抜き取り検査では見逃す可能性もあり、そのまま
製本した場合、不良の本や雑誌を製造し、次の工程で不
良が発見されなければ、そのまま製品として流通される
可能性があった。Heretofore, in order to discover a defect in a signature of a printed matter, it has been general that a printing operator periodically performs a sampling inspection of a printed signature. However, signature failures occur spontaneously and can be overlooked by periodic sampling inspections.If bookbinding is performed as is, defective books or magazines must be manufactured and defects must be found in the next process. If so, it could be distributed as a product.

【０００５】この印刷物の折り工程での不良の検出精度
をあげるために、抜き取り検査の周期を短くすることが
考えられるが、印刷オペレータの作業中の検査頻度には
限界があり、現状以上の頻度で折り品質をチェックする
ことはなかなかに難しい。In order to improve the accuracy of detecting a defect in the folding process of the printed matter, it is conceivable to shorten the cycle of the sampling inspection. However, the inspection frequency during the operation of the printing operator is limited, It is very difficult to check the folding quality.

【０００６】[0006]

【発明が解決しようとする課題】本発明は上記の問題点
に鑑みなされたものであり、その目的とするところは、
折り丁を搬送するラインにおいて、折り丁端部に発生し
易い角折れ、破れなどの発生を検出し、折り機の折り動
作タイミングの調整、部品の交換、不良品の抜き取り作
業などが迅速、且つ、確実に行えるようにすることを目
的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object the following:
In the line where signatures are conveyed, the occurrence of corner breaks, breaks, etc., which are likely to occur at the end of the signature, is detected, and adjustment of the folding operation timing of the folding machine, replacement of parts, removal of defective products, etc. are performed quickly and It is intended to be able to perform it reliably.

【０００７】[0007]

【課題を解決するための手段】[Means for Solving the Problems]

【０００８】上記目的を達成するための第１の発明は、
折り機により折り加工され、搬送される折り丁の端面部
の角折れ・破れなどの不良を検査する折り丁検査方法に
おいて、折り丁の両側縁部を突き揃えた後に、折り丁両
側縁部に押圧を加え、折り丁からの圧力分布を折り丁搬
送方向に取得し、得られた圧力分布を解析して前記不良
の有無を判定することを特徴とする折り丁検査方法であ
る。[0008] A first invention for achieving the above object is:
In a signature inspection method for inspecting defects such as corner breaks and tears at the end face of a signature that is folded and conveyed by a folding machine, after aligning both side edges of the signature, A signature inspection method characterized by applying pressure and acquiring a pressure distribution from a signature in a signature transport direction, and analyzing the obtained pressure distribution to determine the presence or absence of the defect.

【０００９】第２の発明は、上記折り丁からの圧力分布
を折り丁厚み方向にも取得し、解析することによって、
折り丁の端面部の角折れ・破れなどの不良の有無を判定
することを特徴とする請求項１に記載の折り丁検査方法
である。According to a second aspect of the present invention, a pressure distribution from the above-mentioned signature is also obtained in the thickness direction of the signature and analyzed, whereby
2. The signature inspection method according to claim 1, wherein it is determined whether or not there is a defect such as a corner break or a tear in the end face of the signature.

【００１０】第３の発明は、折り機により折り加工さ
れ、搬送される折り丁の端面部の角折れ・破れなどの不
良を検査する折り丁検査装置において、折り丁の両側縁
部を突き揃える折り丁揃え手段と、折り丁両側縁部に押
圧を与え、折り丁搬送方向の圧力分布を得る圧力計測手
段と、その圧力分布を解析して前記不良の有無を判定す
る処理判定手段とを少なくとも備えたことを特徴とする
折り丁検査装置である。According to a third aspect of the present invention, in a signature inspection apparatus for inspecting defects such as corner breaks or breaks in an end face of a signature that is folded and conveyed by a folding machine, both side edges of the signature are aligned. Signature aligning means, pressure measuring means for applying pressure to both side edges of the signature to obtain a pressure distribution in the signature transport direction, and processing determining means for analyzing the pressure distribution to determine the presence or absence of the defect. A signature inspection apparatus characterized by comprising:

【００１１】第４の発明は、上記圧力計測手段は、折り
丁厚み方向についても圧力を計測し、上記処理判定手段
は、折り丁厚み方向についても解析して、折り丁の端面
部の角折れ・破れなどの不良の有無を判定することを特
徴とする請求項３に記載の折り丁検査装置である。According to a fourth aspect of the present invention, the pressure measuring means measures the pressure also in the signature thickness direction, and the processing determining means analyzes also in the signature thickness direction to form a corner bent corner of the signature. The signature inspection device according to claim 3, wherein the presence or absence of a defect such as a tear is determined.

【００１２】本発明では、折り丁の両側縁部に押圧を掛
けることで、角折れや破れなどの折り丁の不良部分から
の反発力が他の正常な部分に比較して弱くなることに着
目し、折り丁搬送方向の圧力分布を両側縁部で求めるこ
とで、折り丁の不良を発見できるようにしたものであ
る。また、折り丁の圧力分布を折り丁の厚さ方向にも求
めることで、折り丁の不良をより正確に発見することが
可能となる。また、一般的に折り丁は鱗重ね状態で搬送
されてくるため、この場合にはさらに、一方の側面の圧
力分布ともう一方の側面の圧力分布を比較することで、
折り丁の不良発見が容易になる。In the present invention, attention is paid to the fact that by applying pressure to both side edges of the signature, the repulsive force from a defective portion of the signature, such as a bent corner or a broken portion, becomes weaker than other normal portions. Then, by finding the pressure distribution in the signature conveying direction at both side edges, a defect of the signature can be found. In addition, by finding the pressure distribution of the signature also in the thickness direction of the signature, it is possible to more accurately detect the defect of the signature. Also, because signatures are generally conveyed in a stacked state, in this case, by further comparing the pressure distribution on one side with the pressure distribution on the other side,
This makes it easier to find a signature failure.

【００１３】[0013]

【発明の実施の形態】以下、本発明の一実施形態を、図
面に基づいて詳細に説明する。図１は本発明の折り丁検
査装置の構成例を示す説明図である。折り機より折り加
工された折り丁１が鱗状に搬送ラインに搬送され、折り
丁揃え手段であるサイドジョガー２によって折り丁１を
左右から挟み込む様に揃えられて搬送される。An embodiment of the present invention will be described below in detail with reference to the drawings. FIG. 1 is an explanatory view showing a configuration example of a signature inspection apparatus according to the present invention. The signature 1 folded by the folding machine is transported in a scale-like manner to a transport line, and is transported by the side jogger 2 as signature alignment means so as to sandwich the signature 1 from right and left.

【００１４】このサイドジョガー２の搬送ラインと平行
な部分には、図２に示すような圧力計測手段である圧力
センサー３が取り付けられている。圧力センサー３に
は、ロードセルなどを用いる。折り丁１は左右から挟み
込まれ揃えられる瞬間に停止し、その時に圧力センサー
３によって折り丁の両側の圧力信号を計測し、図示しな
い処理判定手段にそのデータを出力する。A pressure sensor 3 as pressure measuring means as shown in FIG. 2 is attached to a portion of the side jogger 2 parallel to the transport line. A load cell or the like is used for the pressure sensor 3. The signature 1 is stopped at the moment when it is sandwiched and aligned from the left and right. At that time, the pressure sensor 3 measures the pressure signals on both sides of the signature, and outputs the data to processing determining means (not shown).

【００１５】処理判定手段は、図３に示すように、正常
な場合（ａ）にはＡ側とＢ側の圧力分布はさほど変化が
無いのに対し、不良な場合（ｂ）ではＡ側とＢ側の圧力
分布に違いがでることから、折り丁の一方の側面の圧力
分布ともう一方の側面の圧力分布を比較することで折り
丁に不良が無いかを判定する。そして、処理判定手段に
おいては、適宜、良否の判定を図示しない表示部に表示
し、不良検出時には警報出力（ブザー、ランプ等）する
とともに、外部出力などを可能にする構成とする。As shown in FIG. 3, the processing determining means determines that the pressure distribution on the A side and the B side does not change so much in the case of normal (a), but on the A side in the case of failure (b). Since there is a difference in the pressure distribution on the B side, it is determined whether there is any defect in the signature by comparing the pressure distribution on one side of the signature with the pressure distribution on the other side. Then, the processing determining means appropriately displays the determination of good or bad on a display unit (not shown), outputs an alarm (buzzer, lamp, etc.) when a failure is detected, and enables external output.

【００１６】次いで、判定された情報を元に、不良の折
り丁が発生した場合は、対応する折り丁を除去する。除
去する方法は、インラインで該当の折り丁を自動的に除
去してもよく、オフラインで除去しても構わない。Next, when a defective signature is generated based on the determined information, the corresponding signature is removed. As a method for removing the signature, the signature may be automatically removed in-line, or may be removed off-line.

【００１７】ここでは、サイドジョガー２に圧力センサ
ー３を取り付けた例を示したが、折り丁がサイドジョガ
ー２で揃えられた後に、別に折り丁の両側縁部に押圧を
掛ける装置を設けて、それに圧力センサー３を取り付け
て圧力を計測しても構わない。Here, an example in which the pressure sensor 3 is attached to the side jogger 2 is shown. However, after the signatures are aligned by the side jogger 2, a device for separately applying pressure to both side edges of the signature is provided. The pressure may be measured by attaching the pressure sensor 3 thereto.

【００１８】次に、図４に示すように、折り丁の厚み方
向にも圧力センサー３を設けることで、厚み方向の圧力
分布をＡ側とＢ側で比較することが可能になり、より正
確な判定をできるようになる。Next, as shown in FIG. 4, by providing the pressure sensor 3 also in the thickness direction of the signature, it is possible to compare the pressure distribution in the thickness direction between the A side and the B side, thereby providing more accurate Can be determined.

【００１９】[0019]

【発明の効果】本発明によれば、折り丁の両側縁部の圧
力分布を計測することにより、折り丁内部の不良も検出
可能となり、折り丁の不良の発生を精度よく検出するこ
とができるという効果を奏する。このため、検査してい
る折り丁に不良が発生している時には、これを速やかに
検知して折り動作タイミングの調整や、不良品の抜き取
り作業などが、迅速かつ確実に行えるという効果を奏す
る。According to the present invention, by measuring the pressure distribution at both side edges of the signature, a defect inside the signature can be detected, and the occurrence of a defect in the signature can be accurately detected. This has the effect. For this reason, when a defect is occurring in the signature being inspected, it is possible to quickly and surely detect the defect and adjust the folding operation timing and perform the operation of extracting the defective product quickly and reliably.

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

【図１】本発明の折り丁検査装置の構成例を示す説明図
である。FIG. 1 is an explanatory diagram showing a configuration example of a signature inspection device of the present invention.

【図２】本発明の折り丁検査装置の圧力センサー部の一
例を示す説明図である。FIG. 2 is an explanatory view showing an example of a pressure sensor section of the signature inspection device of the present invention.

【図３】本発明の折り丁検査装置によって、折り丁搬送
方向に圧力分布を計測する説明図であり、（ａ）は折り
丁の正常時を示す図、（ｂ）は折り丁の異常時を示す図
である。FIGS. 3A and 3B are explanatory diagrams of measuring a pressure distribution in a signature conveying direction by the signature inspection apparatus of the present invention, wherein FIG. 3A illustrates a normal signature condition, and FIG. FIG.

【図４】本発明の折り丁検査装置によって、折り丁厚さ
方向に圧力分布を計測する説明図である。FIG. 4 is an explanatory diagram for measuring a pressure distribution in a signature thickness direction by the signature inspection device of the present invention.

【符号の説明】[Explanation of symbols]

１・・・折り丁 ２・・・サイドジョガー ３・・・圧力センサー ４・・・圧力センサーが受ける力 ５・・・折り丁の角折れ部 Ａ・・・搬送方向 DESCRIPTION OF SYMBOLS 1 ... signature 2 ... side jogger 3 ... pressure sensor 4 ... force which a pressure sensor receives 5 ... corner bending part of a signature A ... conveyance direction

Claims (4)

【特許請求の範囲】[Claims] 【請求項１】折り機により折り加工され、搬送される折
り丁の端面部の角折れ・破れなどの不良を検査する折り
丁検査方法において、折り丁の両側縁部を突き揃えた後
に、折り丁両側縁部に押圧を加え、折り丁からの圧力分
布を折り丁搬送方向に取得し、得られた圧力分布を解析
して前記不良の有無を判定することを特徴とする折り丁
検査方法。In a signature inspection method for inspecting defects such as corner breaks and tears of an end face of a signature which is folded and conveyed by a folding machine, after folding both side edges of the signature, folding is performed. A signature inspection method comprising: applying pressure to both side edges of a signature; acquiring a pressure distribution from the signature in the signature transport direction; and analyzing the obtained pressure distribution to determine the presence or absence of the defect. 【請求項２】上記折り丁からの圧力分布を折り丁厚み方
向にも取得し、解析することによって、折り丁の端面部
の角折れ・破れなどの不良の有無を判定することを特徴
とする請求項１に記載の折り丁検査方法。2. The method according to claim 1, wherein the pressure distribution from the signature is also acquired in the thickness direction of the signature and analyzed to determine the presence or absence of a defect such as a corner bend or a tear at the end face of the signature. The signature inspection method according to claim 1. 【請求項３】折り機により折り加工され、搬送される折
り丁の端面部の角折れ・破れなどの不良を検査する折り
丁検査装置において、折り丁の両側縁部を突き揃える折
り丁揃え手段と、折り丁両側縁部に押圧を与え、折り丁
搬送方向の圧力分布を得る圧力計測手段と、その圧力分
布を解析して前記不良の有無を判定する処理判定手段と
を少なくとも備えたことを特徴とする折り丁検査装置。3. A signature inspecting device for inspecting a defect such as a corner break or a tear of an end face of a signature which is folded and conveyed by a folding machine, wherein the signature aligning means aligns both side edges of the signature. And pressure measuring means for applying pressure to both side edges of the signature to obtain a pressure distribution in the signature conveying direction, and processing determining means for analyzing the pressure distribution to determine the presence or absence of the defect. Signature signature inspection device. 【請求項４】上記圧力計測手段は、折り丁厚み方向につ
いても圧力を計測し、上記処理判定手段は、折り丁厚み
方向についても解析して、折り丁の端面部の角折れ・破
れなどの不良の有無を判定することを特徴とする請求項
３に記載の折り丁検査装置。4. The pressure measuring means also measures the pressure in the signature thickness direction, and the processing determining means analyzes also in the signature thickness direction to determine whether the end face of the signature is bent or broken. The signature inspection device according to claim 3, wherein the presence or absence of a defect is determined.