JP6649038B2 - Paper folding mechanism by combination of blades in paper folding device - Google Patents

Paper folding mechanism by combination of blades in paper folding device Download PDF

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JP6649038B2
JP6649038B2 JP2015211903A JP2015211903A JP6649038B2 JP 6649038 B2 JP6649038 B2 JP 6649038B2 JP 2015211903 A JP2015211903 A JP 2015211903A JP 2015211903 A JP2015211903 A JP 2015211903A JP 6649038 B2 JP6649038 B2 JP 6649038B2
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blade
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JP2017081695A (en
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浩 養田
浩 養田
泰徳 宮坂
泰徳 宮坂
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大日本法令印刷株式会社
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Description

本発明は、切れ目を付けて紙を折り畳む紙折り装置における刃の組み合わせによる紙折り機構に関する。   The present invention relates to a paper folding mechanism using a combination of blades in a paper folding device that folds paper with a cut.

製本する方法の一つとして、予め印刷された一枚の用紙を四つ折りまたは八つ折りなど複数回折り畳むことで、複数頁分がまとまった折丁を製造し、複数の折丁を一つにまとめる方法がある。そして、一枚の用紙を精度よく折り畳むために、紙折り装置が用いられる。折り目を直角に交差させるクロス折が可能な紙折り装置が特許文献１、２に開示されている。   As one of the bookbinding methods, a single preprinted sheet is folded several times, such as four-fold or eight-fold, to produce a signature with multiple pages and combine multiple signatures into one. There is a way. In order to fold one sheet with high accuracy, a paper folding device is used. Patent Documents 1 and 2 disclose paper folding apparatuses capable of cross-folding the folds at right angles.

特開平６−２７１１９２号公報JP-A-6-271192 特開２０１３−７１８０６号公報JP 2013-71806 A

クロス折のような折り目が交差する折り方の場合、特許文献１、２に示す紙折り装置を用いて用紙を折り畳むには、用紙と用紙との間に生じた空気の層から空気が折り目以外の場所から抜け出なくてはならない。しかし、入った空気が抜け出ずに、折り目付近で空気が滞留したまま用紙が折り畳まれてしまうと、折り畳まれた用紙にシワが発生してしまうという課題がある。そして、折り畳まれてシワが発生した用紙はロスとなってしまう。シワが発生する条件は様々であり、用紙を折る回数が多くなって用紙が重なるほどシワが発生する可能性が高くなる。また、用紙の厚さが厚ければ厚いほど、用紙を折る回数が少なくてもシワが発生する可能性が高くなり、正確に折ることは難しくなる。このため、紙折り装置に刃を設け、紙折り装置における刃を用紙の厚さが変わるごとに変え、用紙と用紙との間に生じた空気の層から空気を抜け出させている。   In the case of a folding method in which folds such as cross folds intersect, in order to fold the paper using the paper folding device disclosed in Patent Documents 1 and 2, air is generated from a layer of air generated between the papers other than the folds. I have to get out of the place. However, if the sheet is folded with the air staying in the vicinity of the fold without getting out of the entered air, there is a problem that the folded sheet is wrinkled. Then, the paper folded and wrinkled is lost. There are various conditions under which wrinkles occur, and the possibility of wrinkles increases as the number of times the sheets are folded and the sheets overlap. Also, the thicker the paper, the more likely it is that wrinkles will occur even if the number of times the paper is folded is small, and the more difficult it is to fold accurately. For this reason, a blade is provided in the paper folding device, and the blade in the paper folding device is changed each time the thickness of the paper changes, thereby allowing air to escape from a layer of air generated between the papers.

そこで本発明は上記課題を解決するためになされたもので、その目的とするところは、用紙を折り畳んでもシワの発生を低減できる紙折り装置における刃の組み合わせによる紙折り機構を提供することにある。   SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a paper folding mechanism using a combination of blades in a paper folding device that can reduce the generation of wrinkles even when the paper is folded. .

上記の目的を達成するため、本発明の紙折り装置における刃の組み合わせによる紙折り機構は次の構成を備える。すなわち本発明は、搬送路に沿って用紙を搬送する搬送機構と、搬送された用紙を折り畳む複数の紙折り部と、刃により用紙に断続的な切れ目を付ける複数の切れ目付け部とを有する紙折り機構とを具備する紙折り装置における刃の組み合わせによる紙折り機構であって、前記刃は、等長の刃部を有するカット部と、アンカット部とが交互に配列され、前記紙折り機構は、第１の紙折り部と、該第１の紙折り部内に設けられた第１の刃を有する第１の切れ目付け部と、前記第１の紙折り部よりも搬送路の下流に設けられた第２の紙折り部と、該第２の紙折り部内に設けられた第２の刃を有する第２の切れ目付け部と、前記第２の紙折り部よりも搬送路の下流に設けられた第３の紙折り部と、該第３の紙折り部内に設けられた第３の刃を有する第３の切れ目付け部と、前記第３の紙折り部よりも搬送路の下流に設けられた第４の紙折り部とを備え、前記第２の刃の刃部の長さは、前記第１の刃の刃部の長さよりも長く、前記第３の刃の刃部の長さは、前記第２の刃の刃部の長さよりも短いことを特徴とする。この構成によれば、一枚の用紙を複数回折り畳んでもシワの発生を低減でき、精度よく折り畳むことができる。また、一枚の用紙を４回折り畳んでも滞留する空気が抜けてシワの発生を低減でき、精度よく折り畳むことができる。 In order to achieve the above object, a paper folding mechanism using a combination of blades in the paper folding device of the present invention has the following configuration. That is, the present invention provides a paper having a transport mechanism that transports a paper along a transport path, a plurality of paper folding units that fold the transported paper, and a plurality of notch portions that intermittently cut the paper with blades. A paper folding mechanism using a combination of blades in a paper folding device including a folding mechanism, wherein the blades are arranged such that cut portions having equal length blade portions and uncut portions are alternately arranged, Comprises a first folded portion, a first cut portion having a first blade provided in the first folded portion, and a first cut portion provided downstream of the first folded portion. A second folded portion, a second notch portion having a second blade provided in the second folded portion, and a second cut portion provided downstream of the second folded portion. and a third folding portion that is, a third blade provided in the folding portion of the third 3 and cut with part of, the than the third sheet folding section and a fourth folding portion provided downstream of the transport path, the length of the blade portion of the second blade, the first rather long than the length of the blade portion of the blade, the length of the blade portion of the third blade, than the length of the blade portion of the second blade and said short Ikoto. According to this configuration, even if one sheet is folded a plurality of times, generation of wrinkles can be reduced, and folding can be performed with high accuracy. Further, even if one sheet of paper is folded four times, the staying air escapes and the occurrence of wrinkles can be reduced, and folding can be performed accurately.

また、本発明において、前記第１の刃の刃部の前記アンカット部に対する長さの比は２．７以上４以下であり、前記第１の刃の刃部の長さは７ｍｍ以下であってもよい。これによれば、滞留する空気が抜けやすくなると共に、折られた用紙の重ね合わせ位置が正確であって折り精度も良くなる。   In the present invention, the ratio of the length of the blade portion of the first blade to the uncut portion is 2.7 or more and 4 or less, and the length of the blade portion of the first blade is 7 mm or less. You may. According to this, the staying air is easily released, and the overlapping position of the folded sheets is accurate and the folding accuracy is improved.

また、本発明において、前記第２の刃の刃部の前記アンカット部に対する長さの比は９以上１１以下であり、前記第２の刃の刃部の長さは２０ｍｍ以上２１ｍｍ以下であってもよい。これによれば、滞留する空気が抜け、シワが発生しにくくなる。   In the present invention, the ratio of the length of the blade portion of the second blade to the uncut portion is 9 or more and 11 or less, and the length of the blade portion of the second blade is 20 mm or more and 21 mm or less. You may. According to this, the staying air escapes and wrinkles hardly occur.

また、本発明において、前記第３の刃の刃部の前記アンカット部に対する長さの比は２以上３以下であり、前記第３の刃の刃部の長さは１４ｍｍ以上であってもよい。これによれば、切れ目の幅が広くなって糊が入りやすくなって製本しやすくなると共に、製本後に折り畳まれた用紙の一部が抜け落ちてしまうことがない。   In the present invention, the ratio of the length of the blade portion of the third blade to the uncut portion is 2 or more and 3 or less, and the length of the blade portion of the third blade is 14 mm or more. Good. According to this, the width of the cut is widened, the glue easily enters, the bookbinding becomes easy, and a part of the sheet folded after the bookbinding does not fall off.

本発明に係る紙折り装置における刃の組み合わせによる紙折り機構によれば、用紙を折り畳んでもシワの発生を低減できる。   According to the paper folding mechanism using a combination of blades in the paper folding device according to the present invention, it is possible to reduce wrinkles even when the paper is folded.

紙折り装置の概略を示し、（ａ）は斜め上方から見た斜視図であり、（ｂ）は平面図である。1A is a schematic perspective view of a paper folding device as viewed from obliquely above, and FIG. 1B is a plan view. 本実施形態の紙折り機構における切れ目付け部に用いられる刃の概略形状である。（ａ）は第１の刃、（ｂ）は第２の刃、（ｃ）は第３の刃である。It is a schematic shape of the blade used for the notch part in the paper folding mechanism of this embodiment. (A) is a first blade, (b) is a second blade, and (c) is a third blade. 用紙および折り目の位置を示し、（ａ）は第１の紙折り部、（ｂ）は第２の紙折り部、（ｃ）は第３の紙折り部、（ｄ）は第４の紙折り部によって折り畳まれる前の用紙、および折り目の位置である。(A) shows a first folded sheet, (b) shows a second folded sheet, (c) shows a third folded sheet, and (d) shows a fourth folded sheet. FIG. 6 shows the sheet before being folded by the sheet and the position of the fold. 第１の紙折り部の概略を示し、（ａ）は側面図、（ｂ）は搬送方向の後端側から先端側に向けて見たときの正面図である。3A and 3B are schematic views of a first paper folding unit, in which FIG. 4A is a side view, and FIG. 第２の紙折り部の概略を示し、（ａ）は搬送方向の後端側から先端側に向けて見たときの拡大図、（ｂ）はローラおよびナイフが設けられた付近の平面図である。FIG. 3A is a schematic view of a second paper folding unit, FIG. 4A is an enlarged view when viewed from a rear end side to a front side in a transport direction, and FIG. 4B is a plan view near a roller and a knife provided. is there.

以下、本発明の実施形態について、図に基づいて説明する。図１に紙折り装置１０の概略を示し、（ａ）は斜め上方から見た斜視図を示し、（ｂ）は平面図を示す。本実施形態に用いられる紙折り装置１０は、搬送路に沿って用紙１２を搬送する搬送機構と、搬送された用紙１２を折り畳む複数の紙折り部と、刃により用紙１２に断続的な切れ目を付ける複数の切れ目付け部とを有する紙折り機構とを具備する。図１中の点線で描かれた矢印ａ１は、第１の紙折り部１８で折り畳まれた用紙１２の搬送方向を示す。矢印ａ２は、第２の紙折り部２０で折り畳まれた用紙１２の搬送方向を示す。矢印ａ３は、第３の紙折り部２２で折り畳まれた用紙１２の搬送方向を示す。また、第１の紙折り部１８では、用紙１２の搬送方向はａ１と平行な方向である。第２の紙折り部２０内で用紙１２が折り畳まれる位置までの用紙１２の搬送方向はａ１と平行な方向である。第３の紙折り部２２内で用紙１２が折り畳まれる位置までの用紙１２の搬送方向はａ２と平行な方向である。第４の紙折り部２４内で用紙１２が折り畳まれる位置までの用紙１２の搬送方向はａ３と平行な方向である。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 schematically shows the paper folding apparatus 10, in which (a) is a perspective view as viewed from obliquely above, and (b) is a plan view. The paper folding device 10 used in the present embodiment includes a transport mechanism that transports the paper 12 along a transport path, a plurality of paper folding units that fold the transported paper 12, and intermittent cuts in the paper 12 with blades. And a paper folding mechanism having a plurality of cut portions. An arrow a1 drawn by a dotted line in FIG. 1 indicates the transport direction of the sheet 12 folded by the first sheet folding unit 18. The arrow a2 indicates the transport direction of the sheet 12 folded by the second sheet folding unit 20. The arrow a3 indicates the transport direction of the sheet 12 folded by the third sheet folding unit 22. In the first paper folding section 18, the transport direction of the paper 12 is parallel to a1. The transport direction of the sheet 12 to the position where the sheet 12 is folded in the second sheet folding unit 20 is a direction parallel to a1. The transport direction of the sheet 12 up to the position where the sheet 12 is folded in the third sheet folding section 22 is a direction parallel to a2. The transport direction of the sheet 12 to the position where the sheet 12 is folded in the fourth sheet folding section 24 is a direction parallel to a3.

搬送機構は、搬送用ローラ、無端ベルト（いずれも図示せず）が搬送路に設けられていて、回転する搬送用ローラによって搬送用ローラに取り付けられた無端ベルトが回転し、用紙１２が搬送路に沿って搬送される。   The transport mechanism includes a transport roller and an endless belt (both not shown) provided in the transport path. The endless belt attached to the transport roller is rotated by the rotating transport roller, and the paper 12 is transported. Conveyed along.

図１には、平台１４の上に複数枚の用紙１２が積み重なった用紙群１６を示し、紙折り装置１０は、この用紙群１６の中から一枚ずつ用紙１２を分離する。平台１４に積載された用紙１２が少なくなるにつれて平台１４はせり上がり、常に一定な高さ位置にある用紙１２が搬送機構によって搬送路に送られる。搬送路には紙が膨らんだり、まくれたりするのを防ぐために、紙を挟んでどちらか一方側（例えば搬送路の上側）に上押さえ部品が設けられ、もう一方側（例えば搬送路の下側）に下押さえ部品が設けられている。用紙１２は上押さえ部品と下押さえ部品との間を通過する。一例として、上押さえ部品および下押さえ部品は、すのこのように間隔を空けて配置される部品である。   FIG. 1 shows a sheet group 16 in which a plurality of sheets 12 are stacked on a flat base 14, and the sheet folding apparatus 10 separates the sheets 12 one by one from the sheet group 16. As the number of papers 12 loaded on the flat base 14 decreases, the flat base 14 rises, and the paper 12 at a constant height position is always sent to the transport path by the transport mechanism. In order to prevent the paper from bulging or curling up in the transport path, an upper holding part is provided on one side (for example, above the transport path) with the paper in between, and the other side (for example, below the transport path). ) Is provided with a lower holding part. The paper 12 passes between the upper holding component and the lower holding component. As an example, the upper holding component and the lower holding component are such components that are spaced apart from each other.

紙折り機構は、用紙１２を折り畳む回数に応じて複数台の紙折り部が設けられていて、１つの紙折り部によって用紙１２が１回折り畳まれる。搬送路の途中には、搬送路の上流側から下流側に向けて、紙折り部が第１の紙折り部１８、第２の紙折り部２０、第３の紙折り部２２の順に設けられている。この場合、用紙１２が３回折り畳まれて表裏の両面で１６頁分の折丁が得られる。さらに、第３の紙折り部２２よりも搬送路の下流に第４の紙折り部２４が設けられると、用紙１２が４回折り畳まれて表裏の両面で３２頁分の折丁が得られる。   The paper folding mechanism is provided with a plurality of paper folds in accordance with the number of times the paper 12 is folded, and the paper 12 is folded once by one paper fold. In the middle of the transport path, from the upstream side to the downstream side of the transport path, a paper folding section is provided in the order of the first paper folding section 18, the second paper folding section 20, and the third paper folding section 22. ing. In this case, the sheet 12 is folded three times to obtain a signature for 16 pages on both sides. Further, when the fourth paper folding section 24 is provided downstream of the third paper folding section 22 in the transport path, the sheet 12 is folded four times, and signatures for 32 pages are obtained on both the front and back sides.

紙折り機構は、切れ目付け部が設けられていて、１つの切れ目付け部によって用紙１２に切れ目が付けられる。図２に本実施形態の切れ目付け部に用いられる刃の概略形状の一例を示す。（ａ）は第１の切れ目付け部に用いられる第１の刃１９、（ｂ）は第２の切れ目付け部に用いられる第２の刃２１、（ｃ）は第３の切れ目付け部に用いられる第３の刃２３である。刃は円形板状の丸刃であって、円周に沿って等長の刃部２６を有するカット部２８と、アンカット部３０とが交互に配列したものである。円弧に沿った刃部２６の長さをＬ１、また刃部２６と同じ径の円周上におけるアンカット部３０の長さをＬ２とする。Ｌ１とＬ２はそれぞれの刃において好適な範囲で設定される。また、アンカット部３０はＶ溝、Ｕ溝であってもよく、製本されたときに背中側（背表紙側）になる箇所の切れ目が形成される場合は、糊が浸透するように、より深く切削できるＶ溝の方が好ましい。刃の中心に向かうアンカット部３０の深さ方向の長さをＬ３とする。第１の刃１９、第２の刃２１、第３の刃２３は、外周縁に刃部２６が形成されると共に、外周縁に向かって断面は先細りとなる刃先３２を形成している。また、第１から第３のそれぞれの刃１９、２１、２３は切れ目付け部にある支持軸４６に取り付けられるようドーナツ状に中心部がくり抜かれ、ホルダー４１、４３によって挟持される。   The paper folding mechanism is provided with a notch, and the paper 12 is cut by one notch. FIG. 2 shows an example of a schematic shape of a blade used for the notch portion of the present embodiment. (A) is a first blade 19 used for a first cut portion, (b) is a second blade 21 used for a second cut portion, and (c) is a third blade used for a third cut portion. The third blade 23 is provided. The blade is a round blade in the shape of a circular plate, in which cut portions 28 having equal length blade portions 26 and uncut portions 30 are alternately arranged along the circumference. The length of the blade portion 26 along the arc is L1, and the length of the uncut portion 30 on the circumference having the same diameter as the blade portion 26 is L2. L1 and L2 are set in a suitable range for each blade. Further, the uncut portion 30 may be a V-groove or a U-groove, and if a cut is formed at the back side (spin-cover side) when the book is bound, the uncut portion 30 is formed so that the glue penetrates. V-grooves that can be deeply cut are preferred. The length in the depth direction of the uncut portion 30 toward the center of the blade is L3. The first blade 19, the second blade 21, and the third blade 23 have a blade portion 26 formed on the outer peripheral edge, and also have a cutting edge 32 whose cross section tapers toward the outer peripheral edge. The first to third blades 19, 21, and 23 are cut out in the shape of a donut so as to be attached to the support shaft 46 at the notch, and are held by the holders 41 and 43.

第１の刃１９を有する第１の切れ目付け部は、第１の紙折り部１８内の搬送路下流側に設けられる。第２の刃２１を有する第２の切れ目付け部は、第２の紙折り部２０内の搬送路下流側に設けられる。第３の刃２３を有する第３の切れ目付け部は、第３の紙折り部２２内の搬送路下流側に設けられる。紙折り機構では、第１の紙折り部１８によって折り畳まれた用紙１２が、第１の切れ目付け部で第１の刃１９によって切れ目が付けられる。そして、第２の紙折り部２０に搬送され、第２の紙折り部２０によって折り畳まれた用紙１２が、第２の切れ目付け部で第２の刃２１によって切れ目が付けられる。そして、第３の紙折り部２２に搬送され、１６頁分の折丁を得る場合は切れ目が付けられず、第３の紙折り部２２の排出部から３回折り畳まれた用紙１２が排出される。３２頁分の折丁を得る場合は、第３の紙折り部２２によって折り畳まれた用紙１２が、第３の切れ目付け部で第３の刃２３によって切れ目が付けられ、第４の紙折り部２４に搬送される。また、後述するように、各紙折り部１８、２０、２２において、用紙１２が折り畳まれると同時に切れ目が付けられてもよい。   The first cut portion having the first blade 19 is provided in the first paper folding portion 18 on the downstream side of the conveyance path. The second cut portion having the second blade 21 is provided on the downstream side of the transport path in the second paper folding portion 20. The third cut portion having the third blade 23 is provided on the downstream side of the conveyance path in the third folded portion 22. In the paper folding mechanism, the paper 12 folded by the first paper folding unit 18 is cut by the first blade 19 at the first cutting unit. Then, the sheet 12 conveyed to the second sheet folding section 20 and folded by the second sheet folding section 20 is cut by the second blade 21 at the second cut section. Then, when the sheet is conveyed to the third folding section 22 and a signature for 16 pages is obtained, no cut is made, and the sheet 12 folded three times is discharged from the discharge section of the third folding section 22. You. When obtaining signatures for 32 pages, the sheet 12 folded by the third sheet folding section 22 is cut by the third blade 23 at the third cut section, and the fourth sheet folding section is formed. 24. Further, as described later, a cut may be made at the same time as the paper 12 is folded at each of the paper folding units 18, 20, and 22.

図２に示すように、第１の刃１９は、アンカット部３０の長さＬ２よりも刃部２６の長さＬ１の方が長い。同様に、第２の刃２１、第３の刃２３も、いずれもアンカット部３０の長さＬ２よりも刃部２６の長さＬ１の方が長い。そして、第１の刃１９の刃部２６の長さＬ１と第２の刃２１の刃部２６の長さＬ１を比較すると、第１の刃１９の刃部２６の長さＬ１は、第２の刃２１の刃部２６の長さＬ１よりも短くなるように設定される。第２の刃２１の刃部２６の長さＬ１よりも第１の刃１９の刃部２６の長さＬ１を短くすることで、空気の通り道の数が増えるので、滞留する空気が用紙１２内のどの位置にあっても空気が抜けやすくなる。また、第１の刃１９の刃部２６の長さＬ１よりも第２の刃２１の刃部２６の長さＬ１を長くすることで、１６頁分の折丁を得る場合（３回折り）、第２の刃２１によって形成された切れ目が製本されたときに背中側になり、背中側の切れ目に糊が入りやすくなる。３２頁分の折丁を得る場合（４回折り）、折る回数が多くなってもシワが発生しにくい。   As shown in FIG. 2, in the first blade 19, the length L <b> 1 of the blade portion 26 is longer than the length L <b> 2 of the uncut portion 30. Similarly, in each of the second blade 21 and the third blade 23, the length L1 of the blade portion 26 is longer than the length L2 of the uncut portion 30. When the length L1 of the blade portion 26 of the first blade 19 and the length L1 of the blade portion 26 of the second blade 21 are compared, the length L1 of the blade portion 26 of the first blade 19 is Is set to be shorter than the length L1 of the blade portion 26 of the blade 21 of FIG. By making the length L1 of the blade portion 26 of the first blade 19 shorter than the length L1 of the blade portion 26 of the second blade 21, the number of air passages increases. It is easy for air to escape even at any location. Further, when the length L1 of the blade portion 26 of the second blade 21 is made longer than the length L1 of the blade portion 26 of the first blade 19, a signature for 16 pages is obtained (three-folding). The cut formed by the second blade 21 is located on the back side when the book is bound, and the glue easily enters the cut on the back side. When obtaining signatures for 32 pages (four times), wrinkles are unlikely to occur even if the number of times of folding is large.

図３は用紙１２の外観の一例を示し、（ａ）は第１の紙折り部１８によって折り畳まれる前の用紙１２であり、（ｂ）、（ｃ）、（ｄ）はそれぞれ第２の紙折り部２０、第３の紙折り部２２、第４の紙折り部２４によって折り畳まれる前の用紙１２である。さらに、第１の紙折り部１８、第２の紙折り部２０、第３の紙折り部２２、第４の紙折り部２４によって折り畳まれる用紙１２の折り目１８ａ、２０ａ、２２ａ、２４ａの位置を点線で示す。なお、図３中の点線矢印ａ１、ａ２、ａ３は図１と同様に、矢印ａ１は、第１の紙折り部１８で折り畳まれた用紙１２の搬送方向を示す。矢印ａ２は、第２の紙折り部２０で折り畳まれた用紙１２の搬送方向を示す。矢印ａ３は、第３の紙折り部２２で折り畳まれた用紙１２の搬送方向を示す。本実施形態で用いられる紙折り装置１０では、第１の紙折り部１８で折り畳まれた用紙１２の折り目１８ａの位置に対して９０°の方向に第２の紙折り部２０で用紙１２に折り目が付けられて折り畳まれる。さらには、第２の紙折り部２０で折り畳まれた用紙１２の折り目２０ａの位置に対して９０°の方向に第３の紙折り部２２で折り目が付けられて折り畳まれる。同様に、第３の紙折り部２２で折り畳まれた用紙１２の折り目２２ａの位置に対して９０°の方向に第４の紙折り部２４で折り目が付けられる。   3A and 3B show an example of the appearance of the sheet 12, in which FIG. 3A shows the sheet 12 before being folded by the first sheet folding unit 18, and FIGS. 3B, 3C, and 3D each show the second sheet. The sheet 12 before being folded by the folding unit 20, the third paper folding unit 22, and the fourth paper folding unit 24. Further, the positions of the folds 18a, 20a, 22a, 24a of the sheet 12 to be folded by the first sheet folding section 18, the second sheet folding section 20, the third sheet folding section 22, and the fourth sheet folding section 24 are determined. Shown by dotted lines. Note that dotted arrows a1, a2, and a3 in FIG. 3 indicate the transport direction of the sheet 12 folded by the first sheet folding unit 18, as in FIG. The arrow a2 indicates the transport direction of the sheet 12 folded by the second sheet folding unit 20. The arrow a3 indicates the transport direction of the sheet 12 folded by the third sheet folding unit 22. In the paper folding device 10 used in the present embodiment, the paper 12 is folded by the second paper folding unit 20 in a direction 90 ° with respect to the position of the fold 18 a of the paper 12 folded by the first paper folding unit 18. Is attached and folded. Further, the sheet 12 folded by the second sheet folding section 20 is folded at the third sheet folding section 22 in a direction at 90 ° to the position of the fold 20a. Similarly, the fourth paper folding section 24 folds the paper 12 folded by the third paper folding section 22 in the direction at 90 ° to the position of the fold 22a.

また、搬送機構によって搬送されながら折り目が所望の位置に付けられるよう、それぞれの紙折り部が配置される。第２の紙折り部２０における用紙１２の搬送方向ａ１に対して第３の紙折り部２２における用紙１２の搬送方向ａ２が９０°の位置になるように第２の紙折り部２０、第３の紙折り部２２が配置される。そして、第３の紙折り部２２における用紙１２の搬送方向ａ２に対して第４の紙折り部２４における用紙１２の搬送方向ａ３が９０°の位置になるように第４の紙折り部２４が配置される。なお、紙折り装置１０全体では、搬送方向が９０°ずつ回転して図１に示すように反時計回りに用紙１２が搬送されるようにすればよい。   Further, the respective paper folding sections are arranged so that the fold is formed at a desired position while being transported by the transport mechanism. The second paper folding section 20 and the third paper folding section 20 are configured such that the transport direction a2 of the paper 12 in the third paper folding section 22 is 90 ° with respect to the transport direction a1 of the paper 12 in the second paper folding section 20. The paper folding section 22 is disposed. Then, the fourth paper folding section 24 is positioned such that the transport direction a3 of the paper 12 in the fourth paper folding section 24 is 90 ° with respect to the transport direction a2 of the paper 12 in the third paper folding section 22. Be placed. In the entire paper folding apparatus 10, the paper 12 may be rotated in the transport direction by 90 ° so that the paper 12 is transported counterclockwise as shown in FIG.

図４（ａ）に第１の紙折り部１８の概略を示し、第１の紙折り部１８を側方から見た側面図であり、ホルダー４１の断面を示す。（ｂ）に第１の紙折り部１８を正面から見た正面図を示し、第１の紙折り部１８における搬送方向ａ１の後端側から先端側に向けて見たときの正面図を示す。第１の紙折り部１８は、羽根とガイドが設けられた羽根折り（バックル折り）式の紙折り部である。羽根の隙間に用紙１２が入り、用紙１２が第１の紙折り部１８の上端方向に搬送され、搬送された用紙１２は設けられたガイド（ストッパ）に当接する。さらに用紙１２が送り込まれると用紙１２がたわむ。たわんだ用紙１２が、向かい合って回転しているローラ４０ａ、４０ｂに挟まれて巻き込まれて折り畳まれる。このとき、第１の紙折り部１８は用紙１２の搬送方向ａ１に対して直角に折り、用紙１２は二つ折りされる。ガイドの位置を調節することで、折り目１８ａの位置が調整され、用紙１２全体の中央付近に折り目１８ａを形成できる。折り畳まれた用紙１２は、折り目１８ａを先端方向に向けて第２の紙折り部２０内にある搬送路に送られ、用紙１２が第２の紙折り部２０内で折り畳まれる位置まで搬送される。 FIG. 4A schematically illustrates the first folded portion 18, and is a side view of the first folded portion 18 viewed from a side, and illustrates a cross section of the holder 41. (B) shows a front view of the first paper folding unit 18 as viewed from the front, and shows a front view of the first paper folding unit 18 as viewed from the rear end side in the transport direction a1 toward the front end side. . The first paper folding unit 18 is a blade folding (buckle folding) type paper folding unit provided with a blade and a guide. The paper 12 enters the gap between the blades, and the paper 12 is transported toward the upper end of the first paper folding unit 18, and the transported paper 12 abuts a guide (stopper) provided. When the paper 12 is further fed, the paper 12 bends. The warped paper 12 is caught and folded by being sandwiched between the rollers 40a and 40b rotating opposite to each other. At this time, the first folding portion 18 is folded at right angles to the conveying direction a1 of the paper 12, the paper 12 is two fold. By adjusting the position of the guide, the position of the fold 18a is adjusted, and the fold 18a can be formed near the center of the entire sheet 12. The folded sheet 12 is sent to the conveyance path in the second sheet folding section 20 with the fold 18a directed toward the tip, and is conveyed to a position where the sheet 12 is folded in the second sheet folding section 20. .

また、第１の紙折り部１８内には第１の刃１９を有する第１の切れ目付け部が設けられ、第１の紙折り部１８に設けられた支持軸４６には、ホルダー４１ａによって挟持された第１の刃１９が設けられ、オス側となる。また、ホルダー４１ａと向かい合うホルダー４１ｂの方はメス側となる。ホルダー４１はローラ４０と同様に円筒状であり、支持軸４６に取り付けられて回転する。その他、支持軸４６にはローラ４０ｃが取り付けられている。第１の紙折り部１８で折り畳まれた後の用紙１２が、向かい合って回転するホルダー４１ａとホルダー４１ｂとの間を通過すると、第１の刃１９の刃部２６の長さＬ１に合わせて用紙１２に切れ目が付けられる。これと共に、アンカット部３０の長さＬ２に合わせて切れ目と切れ目との間隔が取られる。なお、第１の切れ目付け部により切れ目が付けられた用紙１２は、第２の紙折り部２０内にある搬送機構により、用紙１２が第２の紙折り部２０内で折り畳まれる位置まで搬送される。   Further, a first notch portion having a first blade 19 is provided in the first paper folding portion 18, and a support shaft 46 provided in the first paper folding portion 18 is held by a holder 41 a. Provided first blade 19 is provided on the male side. The holder 41b facing the holder 41a is on the female side. The holder 41 has a cylindrical shape like the roller 40, and is attached to a support shaft 46 and rotates. In addition, a roller 40c is attached to the support shaft 46. When the sheet 12 folded by the first sheet folding section 18 passes between the holder 41a and the holder 41b rotating opposite to each other, the sheet 12 is adjusted to the length L1 of the blade section 26 of the first blade 19. 12 is cut. At the same time, an interval between the cuts is set according to the length L2 of the uncut portion 30. The sheet 12 cut by the first cut section is conveyed to a position where the sheet 12 is folded in the second sheet folding section 20 by a conveying mechanism in the second sheet folding section 20. You.

第１の刃１９によって搬送方向ａ１と平行な方向に切れ目が付けられる位置は、用紙１２の搬送方向ａ１に対して直角方向を二分する位置であり、二つ折りされた用紙１２の中央付近となる。さらには、第１の刃１９によって切れ目が付けられる位置は、第２の紙折り部２０によって用紙１２に折り目が付けられる位置が好ましく、切れ目の位置で第２の紙折り部２０において折り畳まれることが好ましい。 Position cuts is attached in a direction parallel to the conveying direction a1 by the first blade 19 is a position which bisects the right angle direction to the conveying direction a1 of the sheet 12, and near the center of the two-folded sheet 12 Become. Furthermore, the position where the first blade 19 cuts the paper 12 is preferably a position where the paper 12 is creased by the second paper folding unit 20, and is folded at the second paper folding unit 20 at the position of the cut. Is preferred.

第１の刃１９は、一例として折り畳まれる用紙１２の間にある空気を抜くために利用され、特に、第１の紙折り部１８内で折り畳まれた用紙１２を第２の紙折り部２０内で折り畳むときに、用紙１２の間にある空気を抜くために利用する。空気を抜けやすくするため、第１の刃１９は刃数を多くし、刃部２６の長さを短くしている。そして、より具体的には、第１の刃１９の刃部２６のアンカット部３０に対する長さの比（Ｌ１／Ｌ２）は２．７以上４以下であり、第１の刃１９の刃部２６の長さは７ｍｍ以下であることが好ましい。用紙１２上における第１の刃１９による切れ目が７ｍｍ以下となり、アンカット部３０の長さも短いことから、切れ目が入った箇所と切られていない箇所が短い間隔で交互に存在し、空気の通り道が数多くなる。このため、折り畳まれる過程で用紙１２の間から空気が抜け出やすくなる。さらには、折られた用紙１２の重ね合わせ位置が正確であって折り精度も良くなる。また、刃部２６の刃先３２の深さは、約１ｍｍである。第１の刃１９の刃部２６の長さを７ｍｍより大きくし、第１の刃１９の刃部２６のアンカット部３０に対する長さの比（Ｌ１／Ｌ２）が２．７より小さいと、空気が抜けにくくしわになりやすく、折り精度が悪くて用紙１２の重ね合わせ位置がずれる。また、第１の刃１９のアンカット部３０の深さ方向の長さＬ３は２．５ｍｍであり、これにより紙がめくれ上がる現象である、折れめくれを防止できる。 The first blade 19 is used, for example, to evacuate the air between the sheets 12 to be folded, and in particular, the sheet 12 folded in the first sheet folding section 18 to the inside of the second sheet folding section 20. This is used to deflate the air between the papers 12 when folded. The first blade 19 has a large number of blades and a short blade portion 26 in order to make it easy for air to escape. More specifically, the length ratio (L1 / L2) of the blade portion 26 of the first blade 19 to the uncut portion 30 is 2.7 or more and 4 or less, and the blade portion of the first blade 19 The length of 26 is preferably 7 mm or less. Since the cut by the first blade 19 on the paper 12 is 7 mm or less and the length of the uncut portion 30 is short, the cut and the uncut portions are alternately present at short intervals, and the air passage is formed. Will be many. For this reason, it is easy for air to escape from between the sheets 12 during the folding process. Further, the overlapping position of the folded sheet 12 is accurate, and the folding accuracy is improved. The depth of the cutting edge 32 of the cutting portion 26 is about 1 mm. If the length of the blade portion 26 of the first blade 19 is larger than 7 mm and the length ratio (L1 / L2) of the blade portion 26 of the first blade 19 to the uncut portion 30 is smaller than 2.7, It is difficult for air to escape, wrinkles are easily formed, folding accuracy is poor, and the overlapping position of the paper 12 is shifted. The length L3 of the first blade 19 in the depth direction of the uncut portion 30 is 2.5 mm, which can prevent the paper from being folded up, that is, the folding up.

図５（ａ）に第２の紙折り部２０の概略を示し、搬送方向ａ１に沿って搬送方向ａ１の後端側から先端側に向けて見た第２の紙折り部２０を拡大した図であり、用紙１２およびローラ４２ａ、ホルダー４３、支持軸４６の断面を示す。（ｂ）に第２の紙折り部２０における紙折り用のナイフ４４が設けられた付近の平面図を示す。第２の紙折り部２０は、紙折り用のナイフ４４が設けられたナイフ折り式の紙折り部である。用紙１２が第２の紙折り部２０内にある搬送機構によって、ナイフ４４が設けられた所定位置にまで搬送されて止まるよう、ストッパが設けられている。紙折り用のナイフ４４は、用紙１２をローラ４２ａに差し込むために設けられたものであり、搬送された用紙１２の上方には垂直方向に上下に動くナイフ４４が、下方にはローラ４２ａが設けられていて、ナイフ４４は下降して用紙１２に当接する。さらにナイフ４４が下降するとナイフ４４に押圧されて用紙１２がたわみ、たわんだ用紙１２が向かい合って回転しているローラ４２ａによって挟まれることで折り目が形成される。また、第１の切れ目付け部で形成された切れ目の位置に折り目２０ａが形成されるように、第２の紙折り部２０のナイフ４４の位置、ローラ４２ａの位置を調整する。これにより、第２の紙折り部２０は用紙１２の搬送方向ａ１と同じ方向に折り目２０ａを付けて折り畳まれ、用紙１２は四つ折りされる。 FIG. 5A schematically shows the second paper folding unit 20, and is an enlarged view of the second paper folding unit 20 viewed from the rear end side to the front end side in the transport direction a1 along the transport direction a1. 2 shows a cross section of the sheet 12, the roller 42a, the holder 43, and the support shaft 46. (B) is a plan view of the vicinity of the second folding section 20 where the folding knife 44 is provided. The second paper folding unit 20 is a knife folding type paper folding unit provided with a paper folding knife 44. A stopper is provided so that the paper 12 is transported to a predetermined position where the knife 44 is provided and stopped by the transport mechanism in the second paper folding unit 20. The paper folding knife 44 is provided for inserting the paper 12 into the roller 42a. The knife 44 which moves vertically in the vertical direction is provided above the conveyed paper 12, and the roller 42a is provided below. The knife 44 descends and contacts the paper 12. When the knife 44 is further lowered, the paper 12 is bent by being pressed by the knife 44, and the bent paper 12 is sandwiched by the rollers 42a rotating opposite to each other to form a fold. Further, the position of the knife 44 and the position of the roller 42a of the second sheet folding unit 20 are adjusted so that the fold 20a is formed at the position of the cut formed by the first cut unit. Thus, the second folding portion 20 is folded with the fold line 20a in the same direction as the conveying direction a1 of the sheet 12, the sheet 12 is four fold.

また、第２の紙折り部２０内にある支持軸４６には、第２の切れ目付け部として、ホルダー４３ａによって挟持された第２の刃２１が設けられている。その他、支持軸４６にはローラ４２ｂが設けられている。図５（ｂ）に支持軸４６、支持軸４６に軸支されているホルダー４３、第２の刃２１、ローラ４２ｂを点線で示す。ただし、平面視におけるローラ４２ａは省略し、図示していない。第２の紙折り部２０で折り畳まれた後の用紙１２が、向かい合って回転するホルダー４３ａとホルダー４３ｂとの間を通過すると、切れ目が形成される。切れ目は第２の刃２１の刃部２６の長さＬ１に合わせて用紙１２に形成され、アンカット部３０の長さＬ２に合わせて切れ目と切れ目との間隔が取られる。第２の刃２１によって、搬送方向ａ２と平行な方向に切れ目が付けられる位置は、用紙１２の搬送方向ａ２に対して直角方向を二分する位置であり、四つ折りされた用紙１２の中央付近となる。折り畳まれ、第２の切れ目付け部により切れ目が付けられた用紙１２は、折り目２０ａを先端方向にし、第３の紙折り部２２内にある搬送路に送られ、用紙１２が第３の紙折り部２２内で折り畳まれる位置まで搬送される。第２の刃２１によって切れ目が付けられた位置において第３の紙折り部２２によって用紙１２に折り目が付けられることが好ましい。 The support shaft 46 in the second paper folding unit 20 is provided with a second blade 21 sandwiched by a holder 43a as a second cut portion. In addition, a roller 42b is provided on the support shaft 46. FIG. 5B shows the support shaft 46, the holder 43 supported by the support shaft 46, the second blade 21, and the roller 42b by dotted lines. However, the roller 42a in a plan view is omitted and not shown. When the sheet 12 folded by the second sheet folding section 20 passes between the holder 43a and the holder 43b rotating opposite to each other, a cut is formed. The cut is formed on the paper 12 in accordance with the length L1 of the blade portion 26 of the second blade 21, and the gap between the cuts is set in accordance with the length L2 of the uncut portion 30. The second blade 21, the position where the cut is attached in a direction parallel to the conveying direction a2, a position which bisects the right angle direction to the conveying direction a2 of the sheet 12, near the center of the four-folded sheet 12 Becomes The sheet 12 that has been folded and cut by the second cut section is sent to the transport path in the third sheet folding section 22 with the fold 20a in the leading direction, and the sheet 12 is folded by the third sheet folding section. It is transported to a position where it is folded in the section 22. It is preferable that the sheet 12 is creased by the third sheet folding unit 22 at the position where the second blade 21 cuts.

第２の刃２１は、第３の紙折り部２２において折り畳まれる用紙１２の間にある空気を抜くために利用され、第２の刃２１により、折り畳まれた用紙１２内に滞留する空気が抜けてシワが発生することを防止できる。   The second blade 21 is used to remove air between the sheets 12 to be folded at the third sheet folding unit 22, and the second blade 21 removes air staying in the folded sheet 12. This can prevent wrinkles from occurring.

１６頁分の折丁を得る場合、第３の切れ目付け部および第４の紙折り部２４は使用しない。このため、第２の刃２１によって形成された切れ目は製本されたときに背中側になる。１６頁分の折丁を得る場合に用いられる第２の刃２１は、シワが発生することを防止するだけではなく、切れ目に糊を入れやすくするためにも用いられる。シワ発生防止と同時に切れ目に糊を入れやすくするため、第２の刃２１の刃部２６のアンカット部３０に対する長さの比は４以上７以下であり、第２の刃２１の刃部２６の長さは１２ｍｍ以上１４ｍｍ以下であることが好ましい。これにより、シワが防止され、切れ目の幅が広くなって糊が入りやすくなり、製本しやすくなる。１２ｍｍより短いと製本時に糊が折丁に入りにくく、１４ｍｍより長いと製本後に折り畳まれた用紙１２の一部が抜け落ちてしまう。   When obtaining signatures for 16 pages, the third cut section and the fourth paper folding section 24 are not used. Therefore, the cut formed by the second blade 21 is on the back side when bound. The second blade 21 used to obtain signatures for 16 pages is used not only to prevent wrinkles from occurring but also to make it easier to insert glue into cuts. The length ratio of the blade portion 26 of the second blade 21 to the uncut portion 30 is 4 or more and 7 or less in order to prevent the generation of wrinkles and facilitate the formation of glue in the cut. Is preferably 12 mm or more and 14 mm or less. Thereby, wrinkles are prevented, the width of the cut is widened, glue is easily inserted, and bookbinding is facilitated. If it is shorter than 12 mm, the glue will not easily enter the signature at the time of bookbinding, and if it is longer than 14 mm, a part of the sheet 12 folded after bookbinding will fall off.

以降、第４の紙折り部２４が設けられ、３２頁分の折丁を得る場合について述べるが、本実施形態の紙折り装置１０はこれに限定されない。   Hereinafter, a case will be described in which the fourth paper folding unit 24 is provided and a signature for 32 pages is obtained, but the paper folding device 10 of the present embodiment is not limited to this.

３２頁分の折丁を得る場合、特に第２の刃２１は、第２の紙折り部２０で折り重なった用紙１２をさらに第３の紙折り部２２で折り重ねるため、重要となる箇所である。空気を抜けやすくするため、第２の刃２１の刃部２６の長さＬ１を長くしてアンカット部３０の長さＬ２を短くする。より具体的には、アンカット部３０の長さＬ２は１．５ｍｍ以上２．５ｍｍ以下であり、第２の刃２１の刃部２６の長さは２０ｍｍ以上２１ｍｍ以下であることが好ましい。そして、第２の刃２１の刃部２６のアンカット部３０に対する長さの比（Ｌ１／Ｌ２）は９以上１１以下である。また、刃部２６の刃先３２の深さは、約１ｍｍである。アンカット部３０の長さＬ２が１．５ｍｍより短いと用紙１２の一部が抜け落ちることがあり、製本後の本としての耐久性が悪くなる。２．５ｍｍより長いと空気の抜けが悪くなり、シワができてしまう。用紙１２上における第２の刃２１による切れ目が２０ｍｍ以上２１ｍｍ以下となるので、空気の通り道が広くなり、折り畳まれる過程で用紙１２の間から空気が抜け出やすくなる。さらに、この範囲は、折り畳まれた用紙１２の一部が抜け落ちない範囲でもある。また、第２の刃２１のアンカット部３０の深さ方向の長さＬ３は４．０ｍｍであり、これにより紙の折れめくれを防止できる。 In the case of obtaining signatures for 32 pages, the second blade 21 is particularly important because the sheet 12 folded at the second sheet folding section 20 is further folded at the third sheet folding section 22. . In order to make it easy for air to escape, the length L1 of the blade portion 26 of the second blade 21 is increased and the length L2 of the uncut portion 30 is reduced. More specifically, it is preferable that the length L2 of the uncut portion 30 is 1.5 mm or more and 2.5 mm or less, and the length of the blade portion 26 of the second blade 21 is 20 mm or more and 21 mm or less. The length ratio (L1 / L2) of the blade portion 26 of the second blade 21 to the uncut portion 30 is 9 or more and 11 or less. The depth of the cutting edge 32 of the cutting portion 26 is about 1 mm. If the length L2 of the uncut portion 30 is shorter than 1.5 mm, a part of the paper 12 may fall off, and the durability as a book after bookbinding deteriorates. If the length is longer than 2.5 mm, air escape becomes worse and wrinkles are formed. Since the cut by the second blade 21 on the sheet 12 is not less than 20 mm and not more than 21 mm, the path of the air is widened, and the air easily escapes from between the sheets 12 during the folding process. Further, this range is a range in which a part of the folded sheet 12 does not fall off. The length L3 in the depth direction of the uncut portion 30 of the second blade 21 is 4.0 mm, which can prevent the paper from being folded .

第３の紙折り部２２は、ナイフ４４が設けられたナイフ折り式の紙折り部である。ただし、図５に示す第２の紙折り部２０と同様に、折り畳み用のローラ４２ａと、支持軸４６に軸支された第３の刃２３とが別体に設けられてもよく（２段式）、折り畳み用のローラ４２ａに第３の刃２３が取り付けられ、一体に回転するものでもよい（１段式）。この場合は用紙１２が折り畳まれると同時に切れ目を付けることができるので、工程数が減らせる。以下、折り畳み用のローラ４２ａと、第３の刃２３とが一本の支持軸４６に軸支されている１段式の場合について述べる。１段式の場合、ローラ４２ａの外径は、刃の刃先３２が出る程度の大きさであり、ホルダー４３ａとホルダー４３ｂの外径と同径である。第３の紙折り部２２では、図５における搬送方向ａ１はａ２、ａ２はａ３となる。第２の切れ目付け部で形成された切れ目の位置に折り目２２ａが形成されるように、第３の紙折り部２２のナイフ４４の位置が調整される。搬送された用紙１２にナイフ４４が下降して用紙１２の折り目２２ａの位置に当接し、用紙１２が折り畳み用のローラ４２ａに挟みこまれて折り畳まれる。これにより八つ折り（１６頁）になる。 The third paper folding section 22 is a knife folding type paper folding section provided with a knife 44. However, similarly to the second paper folding unit 20 shown in FIG. 5, the folding roller 42a and the third blade 23 supported by the support shaft 46 may be provided separately (two steps). Formula), the third blade 23 may be attached to the folding roller 42a and may rotate integrally (single-stage formula). In this case, since the sheet 12 can be cut at the same time as being folded, the number of steps can be reduced. Hereinafter, a case of a one-stage type in which the folding roller 42a and the third blade 23 are supported by one support shaft 46 will be described. In the case of the one-stage type, the outer diameter of the roller 42a is large enough to protrude the cutting edge 32 of the blade, and is equal to the outer diameter of the holder 43a and the holder 43b. In the third paper folding section 22, the transport direction a1 in FIG. 5 is a2, and a2 is a3 in the transport direction. The position of the knife 44 of the third folded portion 22 is adjusted so that the fold 22a is formed at the position of the cut formed by the second cut. The knife 44 descends on the conveyed sheet 12 and contacts the position of the fold 22a of the sheet 12, and the sheet 12 is sandwiched and folded by the folding roller 42a. This by the folding eight become (page 16).

また、第３の紙折り部２２内にあるローラ４２ａには、ホルダー４３によって挟持された第３の刃２３が設けられ、第３の切れ目付け部を兼ねているので、折り目を付けるローラ４２ａの動きにより、切れ目が形成される。切れ目は第３の刃２３の刃部２６の長さＬ１に合わせて用紙１２に形成され、アンカット部３０の長さＬ２に合わせて切れ目と切れ目との間隔が取られる。第３の刃２３によって、搬送方向ａ３と平行な方向に切れ目が付けられる位置は、用紙１２の搬送方向ａ３に対して直角方向を二分する位置であり、八つ折りされた用紙１２の中央付近となる。折り畳まれ、第３の切れ目付け部により切れ目が付けられた用紙１２は、折り目２２ａを先端方向にし、第４の紙折り部２４内にある搬送路に送られ、用紙１２が第４の紙折り部２４内で折り畳まれる位置まで搬送される。 Further, the roller 42a in the third paper folding section 22 is provided with the third blade 23 sandwiched by the holder 43, and also serves as the third cutting section. The movement forms a cut. The cut is formed on the paper 12 in accordance with the length L1 of the blade portion 26 of the third blade 23, and the gap between the cuts is set in accordance with the length L2 of the uncut portion 30. By the third blade 23, the position where the cut is attached in a direction parallel to the conveying direction a3, a position which bisects the right angle direction to the conveying direction a3 of the sheet 12, near the center of the eight-folded sheet 12 Becomes The sheet 12 that has been folded and cut by the third cut section is sent to the transport path in the fourth sheet folding section 24 with the fold 22a in the leading direction, and the sheet 12 is folded by the fourth sheet folding section. The sheet is conveyed to a position where it is folded in the section 24.

第３の刃２３は、折り畳まれた用紙１２の間にある空気を抜くために利用され、第３の刃２３により、折り畳まれた用紙１２内に滞留する空気が抜けてシワが発生することを防止できる。また、第３の刃２３の厚さは他の刃よりも厚く、１ｍｍ程度であることが好ましく、他の刃よりも刃先３２が深く、刃部２６の刃先３２の深さは約２ｍｍである。これにより、折り畳まれて重なった用紙１２でも確実に切れ目を付けることができる。第３の刃２３の刃部２６のアンカット部３０に対する長さの比は２以上３以下であり、第３の刃２３の刃部２６の長さは１４ｍｍ以上である。また、第３の刃２３のアンカット部３０の長さＬ２は、６ｍｍ以上７ｍｍ以下であることが好ましい。これにより、切れ目の幅が広くなって糊が入りやすくなり、製本しやすくなる。６ｍｍより短いとシワが発生する。さらに、第２の刃２１と第３の刃２３による切れ目が交差する箇所で用紙１２の折れめくれが発生する。７ｍｍより長いと製本時に糊が折丁に入りにくく、シワが発生し、製本後に折り畳まれた用紙１２の一部が抜け落ちてしまうことがある。 The third blade 23 is used to release air between the folded papers 12, and the third blade 23 removes air remaining in the folded paper 12 and causes wrinkles to occur. Can be prevented. Further, the thickness of the third blade 23 is preferably thicker than the other blades and about 1 mm, the depth of the blade edge 32 is deeper than the other blades, and the depth of the blade edge 32 of the blade portion 26 is about 2 mm. . This makes it possible to reliably make a cut even in the folded paper 12. The ratio of the length of the blade portion 26 of the third blade 23 to the uncut portion 30 is 2 or more and 3 or less, and the length of the blade portion 26 of the third blade 23 is 14 mm or more. The length L2 of the uncut portion 30 of the third blade 23 is preferably 6 mm or more and 7 mm or less. As a result, the width of the cut is widened, glue is easily inserted, and bookbinding is facilitated. If it is shorter than 6 mm, wrinkles are generated. Further, the paper 12 is folded at a position where the cuts formed by the second blade 21 and the third blade 23 intersect. If it is longer than 7 mm, the glue is less likely to enter the signature at the time of bookbinding, causing wrinkles and a part of the sheet 12 folded after bookbinding may fall off.

また、３２頁分の折丁を得る場合、第３の刃２３の刃部２６の長さＬ１と第２の刃２１の刃部２６の長さＬ１を比較すると、第３の刃２３の刃部２６の長さは、第２の刃２１の刃部２６の長さよりも短い。これにより、製本後に用紙１２の一部が抜け落ちることがない。また、第１の刃１９と第３の刃２３のアンカット部３０の長さを比較すると、第１の刃１９のアンカット部３０の長さＬ２は、第３の刃２３のアンカット部３０の長さＬ２よりも短い。これにより、折り精度が良く、紙と紙との重ね合わせ位置が正確になる。また、第３の刃２３のアンカット部３０の深さ方向の長さＬ３は４．０ｍｍであり、これにより紙の折れめくれを防止できる。 Further, when obtaining a signature for 32 pages, comparing the length L1 of the blade portion 26 of the third blade 23 with the length L1 of the blade portion 26 of the second blade 21, The length of the portion 26 is shorter than the length of the blade portion 26 of the second blade 21. This prevents a part of the paper 12 from falling off after bookbinding. In addition, comparing the length of the uncut portion 30 of the first blade 19 and the third blade 23, the length L2 of the uncut portion 30 of the first blade 19 is equal to the length of the uncut portion 30 of the third blade 23. It is shorter than 30 length L2. As a result, the folding accuracy is good and the overlapping position of the paper becomes accurate. The length L3 in the depth direction of the uncut portion 30 of the third blade 23 is 4.0 mm, which can prevent the paper from being folded .

第４の紙折り部２４は、第３の紙折り部２２と同様の機構を有し、ナイフ４４が設けられたナイフ４４折り式の紙折り部である。すなわち、搬送方向ａ１はａ３となる。第３の切れ目付け部で形成された切れ目の位置に折り目２４ａが形成されるように、第４の紙折り部２４のナイフ４４の位置が調整される。搬送された用紙１２にナイフ４４が下降して用紙１２の折り目２４ａの位置に当接し、用紙１２がローラ４２ａに挟みこまれて折り畳まれる。これにより十六折り（３２頁）になる。ただし、ローラ４２ａには用紙１２に切れ目を付ける刃は設けられていない。 The fourth paper folding unit 24 has the same mechanism as the third paper folding unit 22, and is a knife 44 folding type paper folding unit provided with a knife 44. That is, the transport direction a1 is a3. The position of the knife 44 of the fourth paper folding section 24 is adjusted so that the fold 24a is formed at the position of the cut formed by the third cut section. The knife 44 descends on the conveyed paper 12 and comes into contact with the position of the fold 24a of the paper 12, and the paper 12 is sandwiched between the rollers 42a and folded. This results in 16 folds (32 pages). However, the blade that cuts the paper 12 is not provided on the roller 42a.

従来は、用紙１２の厚さが変わると予め用紙１２の厚さに応じて設定された刃を用い、折り畳む用紙１２の厚さが変わるごとに刃を交換していた。しかし、本実施形態のさらなる特徴として、折り畳む用紙１２の厚さが変わるごとに紙折り装置１０にある第１の刃１９、第２の刃２１、第３の刃２３を付け替える必要がない。すなわち、辞書用の薄い用紙１２や一般的な厚さの用紙１２など、幅広い範囲で様々な厚さの用紙１２でも同じ第１の刃１９、第２の刃２１、第３の刃２３の組み合わせ、もしくは同じ第１の刃１９、第２の刃２１の組み合わせで紙をシワなく折り畳むことができる。   Conventionally, when the thickness of the paper 12 changes, a blade preset according to the thickness of the paper 12 is used, and the blade is replaced every time the thickness of the paper 12 to be folded changes. However, as a further feature of this embodiment, it is not necessary to replace the first blade 19, the second blade 21, and the third blade 23 in the paper folding device 10 each time the thickness of the sheet 12 to be folded changes. That is, the same combination of the first blade 19, the second blade 21, and the third blade 23 can be applied to the paper 12 having various thicknesses in a wide range such as the thin paper 12 for a dictionary and the paper 12 having a general thickness. Alternatively, the paper can be folded without wrinkles using the same combination of the first blade 19 and the second blade 21.

（実施例１）３２頁分の折丁を得る場合
表１に第１の切れ目付け部、第２の切れ目付け部、第３の切れ目付け部に用いられる第１の刃１９、第２の刃２１、第３の刃２３の大きさの組み合わせを示す。表１に示す刃をそれぞれ第１の切れ目付け部、第２の切れ目付け部、第３の切れ目付け部に取り付けて、１０００枚の用紙１２を用いて紙折り装置１０を運転したところ、１枚もシワが発生した用紙１２はなかった。さらに辞書や薬品などの取扱説明書に用いられる薄い用紙１２を用い、同じ第１の刃１９、第２の刃２１、第３の刃２３を用いて紙折り装置１０を運転したところ１枚もシワが発生しなかった。また、折り精度が良く、より正確な所望の位置で折り畳むことができた。これにより、用紙１２の厚さに関わらず、シワを発生させずに正確な位置で用紙１２を折り畳むことができた。さらに、折れめくれも発生しなかった。また、糊が切れ目に良く入り、製本強度が確保されて用紙１２の一部の抜けがなかった。 (Example 1) In the case of obtaining a signature of 32 pages Table 1 shows the first blade 19 and the second blade used for the first cut portion, the second cut portion, and the third cut portion. 21 shows combinations of the sizes of the third and third blades 23. The blade shown in Table 1 was attached to each of the first cut portion, the second cut portion, and the third cut portion, and the folding apparatus 10 was operated using 1000 sheets of paper 12. There was no wrinkled paper 12. Furthermore, when the paper folding device 10 was operated using the same first blade 19, second blade 21, and third blade 23 using thin paper 12 used for an instruction manual such as a dictionary and chemicals, one sheet was found. No wrinkles occurred. In addition, the folding accuracy was good, and the folding could be performed at a more accurate desired position. As a result, regardless of the thickness of the sheet 12, the sheet 12 could be folded at an accurate position without generating wrinkles. In addition, curled break did not occur. In addition, the glue was well cut and the bookbinding strength was ensured, so that part of the paper 12 was not missing.

Figure 0006649038
Figure 0006649038

（実施例２）１６頁分の折丁を得る場合
表２に第１の切れ目付け部、第２の切れ目付け部に用いられる第１の刃１９、第２の刃２１の大きさの組み合わせを示す。表２に示す刃をそれぞれ第１の切れ目付け部、第２の切れ目付け部に取り付けて、１０００枚の用紙１２を用いて紙折り装置１０を運転したところ、１枚もシワが発生した用紙１２はなかった。さらに辞書や薬品などの取扱説明書に用いられる薄い用紙１２を用い、同じ第１の刃１９、第２の刃２１を用いて紙折り装置１０を運転したところ１枚もシワが発生しなかった。また、より正確な所望の位置で折り畳むことができた。これにより、用紙１２の厚さに関わらず、シワを発生させずに正確な位置で用紙１２を折り畳むことができた。さらに、用紙１２の一部の抜けがなかった。 (Example 2) When obtaining signatures for 16 pages Table 2 shows the combinations of the sizes of the first blade 19 and the second blade 21 used for the first cut portion and the second cut portion. Show. When the blade shown in Table 2 was attached to the first cut portion and the second cut portion, respectively, and the paper folding apparatus 10 was operated using 1000 sheets of paper 12, all of the sheets 12 having wrinkles were found. There was no. Further, when the paper folding apparatus 10 was operated using the same first blade 19 and second blade 21 using the thin paper 12 used for an instruction manual such as a dictionary and chemicals, no wrinkles were generated. . In addition, it was possible to fold at a more accurate desired position. Thereby, regardless of the thickness of the sheet 12, the sheet 12 could be folded at an accurate position without causing wrinkles. Further, there was no part of the paper 12 missing.

Figure 0006649038
Figure 0006649038

（比較例１）
比較例として、第１の切れ目付け部、第２の切れ目付け部、第３の切れ目付け部に用いられる従来の刃をそれぞれ、刃Ａ、刃Ｂ、刃Ｃとし、これらの刃の大きさの組み合わせを示す。比較例１として、表３に示す刃Ａ−１〜４を第１の切れ目付け部に取り付けた。実施例の第１の刃１９と比較して、刃Ａ−１〜４の折り精度は悪く、位置がずれて重ならないことがあった。 (Comparative Example 1)
As comparative examples, the conventional blades used for the first cut portion, the second cut portion, and the third cut portion are referred to as a blade A, a blade B, and a blade C, respectively. Show the combination. As Comparative Example 1, the blades A-1 to A-4 shown in Table 3 were attached to the first cut portions. In comparison with the first blade 19 of the embodiment, the folding accuracy of the blades A-1 to A-4 was poor, and the blades A-1 to 4 were sometimes displaced and did not overlap.

Figure 0006649038
Figure 0006649038

（比較例２）
表４に示す第１の刃１９を第１の切れ目付け部、異なる形状の刃Ｂ−１〜刃Ｂ−６を第２の切れ目付け部に１種類取り付けた。複数枚の同じ厚さの用紙１２を１単位とし、単位ごとに刃Ｂ−１を用いて紙折り装置１０を運転し、用紙１２を折り畳んだ。用紙１２の厚さを変えて折り畳んだところ、それぞれの厚さの用紙１２で１％から５２％のシワが発生した。刃Ｂ−２〜刃Ｂ−６の場合でもシワが発生し、発生確率はそれぞれ、刃Ｂ−２は２８％、刃Ｂ−３は１２％、刃Ｂ−４は３６％、刃Ｂ−５は８％、刃Ｂ−６は１７％であった。 (Comparative Example 2)
The first blade 19 shown in Table 4 was attached to the first cut portion, and the blades B-1 to B-6 having different shapes were attached to the second cut portion. A plurality of sheets 12 of the same thickness were set as one unit, and the sheet folding device 10 was operated using the blade B-1 for each unit to fold the sheet 12. When the paper 12 was folded while being changed in thickness, wrinkles of 1% to 52% were generated in the paper 12 of each thickness. Even in the case of blades B-2 to B-6, wrinkles are generated, and the occurrence probability is 28% for blade B-2, 12% for blade B-3, 36% for blade B-4, and blade B-5. Was 8% and blade B-6 was 17%.

Figure 0006649038
Figure 0006649038

（比較例３）
表５に示す第１の刃１９を第１の切れ目付け部、第２の刃２１を第２の切れ目付け部、異なる形状の刃Ｃ−１〜４を第３の切れ目付け部に１種類取り付けた。同じ厚さの用紙１２を用い、紙折り装置１０を運転して用紙１２を折り畳んだところ、刃Ｃ−１〜刃Ｃ−２の場合ではシワが発生し、発生確率はそれぞれ、刃Ｃ−１は１５％、刃Ｃ−２は９％であった。また、刃Ｃ−３〜刃Ｃ−４の場合では折れめくれが生じた。 (Comparative Example 3)
One kind of the first blade 19 shown in Table 5 is attached to the first notch portion, the second blade 21 is attached to the second notch portion, and the blades C-1 to C-4 having different shapes are attached to the third notch portion. Was. When the paper folding device 10 is operated and the paper 12 is folded using the paper 12 having the same thickness, wrinkles are generated in the case of the blades C-1 to C-2, and the occurrence probability is respectively equal to the blade C-1. Was 15% and blade C-2 was 9%. Further, in the case of the blades C-3 to C-4, bending was caused.

Figure 0006649038
Figure 0006649038

１０ 紙折り装置
１２ 用紙
１４ 平台
１６ 用紙群
１８ 第１の紙折り部
１９ 第１の刃
２０ 第２の紙折り部
２１ 第２の刃
２２ 第３の紙折り部
２３ 第３の刃
２４ 第４の紙折り部
２６ 刃部
２８ カット部
３０ アンカット部
３２ 刃先
４０、４０ａ、４０ｂ、４０ｃ ローラ
４１、４１ａ、４１ｂ ホルダー
４２、４２ａ、４２ｂ ローラ
４３、４３ａ、４３ｂ ホルダー
４４ ナイフ
４６ 支持軸 REFERENCE SIGNS LIST 10 paper folding device 12 paper 14 flat base 16 paper group 18 first paper folding section 19 first blade 20 second paper folding section 21 second blade 22 third paper folding section 23 third blade 24 fourth Folded part 26 Blade part 28 Cut part 30 Uncut part 32 Blade edge 40, 40a, 40b, 40c Roller 41, 41a, 41b Holder 42, 42a, 42b Roller 43, 43a, 43b Holder 44 Knife 46 Support shaft

Claims (4)

搬送路に沿って用紙を搬送する搬送機構と、
搬送された用紙を折り畳む複数の紙折り部と、刃により用紙に断続的な切れ目を付ける複数の切れ目付け部とを有する紙折り機構とを具備する紙折り装置における刃の組み合わせによる紙折り機構であって、
前記刃は、等長の刃部を有するカット部と、アンカット部とが交互に配列され、
前記紙折り機構は、第１の紙折り部と、該第１の紙折り部内に設けられた第１の刃を有する第１の切れ目付け部と、前記第１の紙折り部よりも搬送路の下流に設けられた第２の紙折り部と、該第２の紙折り部内に設けられた第２の刃を有する第２の切れ目付け部と、前記第２の紙折り部よりも搬送路の下流に設けられた第３の紙折り部と、該第３の紙折り部内に設けられた第３の刃を有する第３の切れ目付け部と、前記第３の紙折り部よりも搬送路の下流に設けられた第４の紙折り部とを備え、
前記第２の刃の刃部の長さは、前記第１の刃の刃部の長さよりも長く、前記第３の刃の刃部の長さは、前記第２の刃の刃部の長さよりも短いことを特徴とする紙折り装置における刃の組み合わせによる紙折り機構。 A transport mechanism for transporting the paper along the transport path,
A paper folding mechanism using a combination of blades in a paper folding apparatus including a paper folding mechanism having a plurality of paper folding units that fold the conveyed paper and a plurality of notching units that intermittently cut the paper with the blades. So,
The blade, a cut portion having an equal length blade portion, and an uncut portion are alternately arranged,
The paper folding mechanism includes a first paper folding section, a first notch section having a first blade provided in the first paper folding section, and a transport path that is larger than the first paper folding section. Paper folding section provided downstream of the second paper folding section, a second notch section having a second blade provided in the second paper folding section, and a transport path more than the second paper folding section. A third folded portion provided downstream of the third folded portion, a third notched portion having a third blade provided in the third folded portion, and a transport path more than the third folded portion. A fourth paper folding section provided downstream of the
The blade section length of the second blade, the rather long than the length of the blade portion of the first blade, the length of the blade portion of the third blade, the blade portion of the second blade A paper folding mechanism using a combination of blades in a paper folding device, wherein the length is shorter than the length . 前記第１の刃の刃部の前記アンカット部に対する長さの比は２．７以上４以下であり、前記第１の刃の刃部の長さは７ｍｍ以下であることを特徴とする請求項１に記載の紙折り装置における刃の組み合わせによる紙折り機構。 The ratio of the length of the blade portion of the first blade to the uncut portion is 2.7 or more and 4 or less, and the length of the blade portion of the first blade is 7 mm or less. Item 2. A paper folding mechanism using a combination of blades in the paper folding device according to Item 1. 前記第２の刃の刃部の前記アンカット部に対する長さの比は９以上１１以下であり、前記第２の刃の刃部の長さは２０ｍｍ以上２１ｍｍ以下であることを特徴とする請求項１または請求項２に記載の紙折り装置における刃の組み合わせによる紙折り機構。   The length ratio of the blade portion of the second blade to the uncut portion is 9 or more and 11 or less, and the length of the blade portion of the second blade is 20 mm or more and 21 mm or less. A paper folding mechanism using a combination of blades in the paper folding device according to claim 1 or 2. 前記第３の刃の刃部の前記アンカット部に対する長さの比は２以上３以下であり、前記第３の刃の刃部の長さは１４ｍｍ以上であることを特徴とする請求項１から請求項３のいずれか一項に記載の紙折り装置における刃の組み合わせによる紙折り機構。 The ratio of length to uncut portion of the blade portion of the third blade is 2 to 3, claim 1, wherein the length of the blade portion of the third blade is 14mm or more A paper folding mechanism using a combination of blades in the paper folding device according to any one of claims 1 to 3 .
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DE102014222319B4 (en) * 2014-10-31 2021-04-29 Koenig & Bauer Ag Production line with a printing machine

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