JP3915420B2 - Paper folding device - Google Patents

Paper folding device Download PDF

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Publication number
JP3915420B2
JP3915420B2 JP2001090005A JP2001090005A JP3915420B2 JP 3915420 B2 JP3915420 B2 JP 3915420B2 JP 2001090005 A JP2001090005 A JP 2001090005A JP 2001090005 A JP2001090005 A JP 2001090005A JP 3915420 B2 JP3915420 B2 JP 3915420B2
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Japan
Prior art keywords
sheet
paper
folding
path
stop member
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Expired - Fee Related
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JP2001090005A
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Japanese (ja)
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JP2002284444A (en
Inventor
久男 細谷
秀世 大橋
和儀 淤見
優 後藤
友貴 長岡
和晃 福田
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Konica Minolta Inc
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Konica Minolta Inc
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Priority to JP2001090005A priority Critical patent/JP3915420B2/en
Priority to US10/075,354 priority patent/US6719680B2/en
Publication of JP2002284444A publication Critical patent/JP2002284444A/en
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Publication of JP3915420B2 publication Critical patent/JP3915420B2/en
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Description

【0001】
【発明の属する技術分野】
本発明は複写機等の画像形成装置の画像形成された用紙をZ折り等紙折りする場合の折り機構の簡略化と折りの正確性を計り、紙詰まり等の問題が無く、あっても簡単確実に復元処理できるようにした用紙折り装置に関する。
【0002】
【従来の技術】
従来、用紙をZ折り等紙折りする場合の折り機構では実開昭63−190254号や特開平9−77360号に開示されているように、1回目の折り通路、2回目の折り通路及び2回折り後の排紙路はそれぞれ独立して別々に存在していたために、用紙搬送路を構成する案内板等の案内部材が多く配置されている。複写機等の画像形成装置の画像形成された用紙をZ折り等紙折りする場合の折り機構の用紙通路はこのようにそれぞれ役割に応じた経路を別々に形成して複雑な構成を採っていた。
【0003】
【発明が解決しようとする課題】
しかし、紙折り装置中でも3本の用紙搬送路の内側に位置する折り通路内に起こる紙詰まり等のジャムの問題があったとき、外側から手がとどきにくく、それを解除復元するには外側の搬送路を取り外して行わねばならず手間が掛かり可成り大きな困難を伴っていた。
【0004】
本発明はこのような従来技術の欠点を解消し、取り扱い易く簡単で故障になりにくい構成の用紙折り装置を提供することを課題目的にする。
【0005】
【課題を解決するための手段】
この目的は次の技術手段(1)又は(2)によって達成される。
【0006】
(1) 画像形成された用紙を搬送する用紙搬送手段と該用紙搬送手段によって搬送される用紙の先端を当接停止させるべく搬送路に設けた位置調節移動の可能な停止部材と、該停止部材によって形成される用紙の撓みを二つの折りローラで構成されるローラ対に挟み込んで折り目を形成する用紙折り装置であって、最終折りの用紙先端部を構成する部分の用紙搬送路と最終的に折られた用紙の排紙通路とを同一にしたことを特徴とする用紙折り装置。
【0007】
(2) 画像形成された用紙を搬送する用紙搬送手段と該用紙搬送手段によって搬送される用紙の先端を当接停止させるべく搬送路に設けた位置調節移動の可能な停止部材と、該停止部材によって形成される用紙の撓みを二つの折りローラで構成されるローラ対に挟み込んで折り目を形成する用紙折り装置であって、最終折りの用紙先端部を構成する部分の用紙搬送路と最終的に用紙が折られるローラ対との間に用紙が前進又は後退することを検知する検知手段を設け、該検知手段の検知情報に基づいて折り通路内の停止部材を折り通路から退避し最終的に折られた用紙を排紙せしめる制御手段を設けたことを特徴とする用紙折り装置。
【0008】
ここで、最終折りの用紙先端部とは、その前の折り目部分(後述する折り目b)のことで、最終折りがなされる折り目(後述する折り目a)の位置を決める役割の先端部となるところである。
【0009】
【発明の実施の形態】
次に、本発明の用紙折り装置と、それによる用紙折り後の用紙後処理装置及びそれ等を連結した画像形成装置本体を添付図面に基づいて説明する。
【0010】
図1は画像形成装置本体A、用紙Z折り装置B、用紙後処理装置FS及び自動原稿送り装置DFを備えた画像形成装置の全体構成図である。
【0011】
図示の画像形成装置本体Aは、画像読み取り部1、画像処理部2、画像書き込み部3、画像形成部4、カセット給紙部5、大容量給紙部(LCT)6、定着装置7、排紙部8、自動両面コピー給紙部(ADU)9を備えている。
【0012】
画像形成装置本体Aの上部には、自動原稿送り装置DFが搭載されている。画像形成装置本体Aの図示の左側面の排紙部8側には、用紙Z折り装置Bと用紙後処理装置FSが連結されている。
【0013】
自動原稿送り装置DFの原稿台上に載置された原稿dは矢印方向に搬送され画像読み取り部1の光学系により原稿の片面又は両面の画像が読みとられ、CCDイメージセンサ1Aに読み込まれる。
【0014】
CCDイメージセンサ1Aにより光電変換されたアナログ信号は、画像処理部2において、アナログ処理、A/D変換、シェーディング補正、画像圧縮処理等を行った後、画像書き込み部3に信号を送る。
【0015】
画像書き込み部3においては、半導体レーザからの出力光が画像形成部4の感光体ドラムに照射され、潜像を形成する。画像形成部4においては、帯電、露光、現像、転写、分離、クリーニング等の処理が行われ、カセット給紙部5又は大容量給紙部6から搬送された用紙Sに画像が転写される。画像を担持した用紙Sは、定着装置7により定着され、排紙部8から用紙Z折り装置B又は用紙後処理装置FSに直接送り込まれる。或いは搬送路切り替え板8Aにより自動両面コピー給紙部9に送り込まれた片面画像処理済みの用紙Sは再び画像形成部4において、両面画像処理後、排紙部8から用紙Z折り装置Bに送り込まれる。
【0016】
用紙Z折り装置Bは、複数の折りローラにより、用紙Sを二度折りしてつづら状のZ字型に折り畳み、図2に示すように形成する。
【0017】
図2(a)は、Z折り処理される前の用紙Sの平面図である。破線で示すa,bは折り目線である。
【0018】
図2(b)は、Z折り処理された用紙Sの平面図である。用紙Z折り装置Bの複数の折りローラによりZ折り処理した用紙Sには、折り目線a,bが形成され折り畳まれる。
【0019】
図2(c)は、Z折り処理され更に綴じ処理する状態を示す用紙束の斜視図である。Z折り処理された用紙Sは、後述の用紙後処理装置FS内に搬送され、綴じ手段50により綴じ針SPが打針され、端綴じ処理された冊子に形成されるときの状態を示している。
【0020】
図1に示す用紙後処理装置FSには、図示の上段から、用紙Z折り装置Bで紙折り処理されず、本発明の用紙Z折り装置Bの下部の切り換え通路を通って集積されたり、用紙Z折り装置BでZ折りされたままの状態即ち編集して綴じられたりすることのない状態のまま集積される固定排紙皿81、冊子として編集される場合に用いる表紙給紙手段40、シフト処理搬送部(大容量排紙搬送部)20、第1積載部30、綴じ手段50、二つ折り手段60が、ほぼ垂直方向に縦列配置されている。
【0021】
用紙後処理装置FSの図示右方には入口搬送部10が配置されている。また、用紙後処理装置FSの図示左側面には、端綴じ及びシフト処理済みの用紙を積載する昇降排紙皿82と、中綴じ及び二つ折り処理済みの用紙を積載する固定排紙皿83とが配置されている。
【0022】
図3は、本発明の用紙折り装置の実施の形態の一例を表す用紙Z折り装置Bの用紙搬送経路を示す断面図である。
【0023】
画像形成装置本体Aの排紙部8から排出された画像形成処理済みの用紙Sは、紙折り操作を行わない場合は、入口部101に導入され、用紙搬送路102を通過して、搬送ローラ103,104により搬送され、用紙Z折り装置B外の用紙後処理装置FSに排出される。
【0024】
この用紙搬送過程では、切り替え手段105はソレノイドSD10オフの状態で、図示の破線で示す位置に保持され、用紙搬送路106を開放し、用紙搬送路107を閉止状態にして、用紙Sが用紙搬送路108を経て、用紙後処理装置FSに排出可能である。
【0025】
用紙Z折り処理モードに設定されると、ソレノイドSD10の駆動により切り替え手段105が揺動され、図示の実線で示す位置に保持され、用紙搬送路106を閉止し、用紙搬送路107を開放状態にして、用紙SをZ折りする折りローラ113,114で構成されるローラ対へ搬送可能にする。
【0026】
用紙搬送路107を通過した用紙Sは、搬送ローラ110により搬送され、用紙搬送路111に案内されて上昇し、用紙先端部が第1の停止部材112に当接して進行が遮られるが、それを図4の回路図にも示すように、第1の停止部材112の近傍に設けた用紙先端検出器142によって検出し、搬送を継続する用紙Sの中間部は、折り形成ガイド111Aが図示の破線で示される位置から、支点111A1の回りに実線で示される位置に回動して紙折りし易いように撓みを形成した後、圧接して駆動回転する一対の折りローラ113,114に挟持され、折り目線bが形成される。
【0027】
折り目線bにより折り処理された用紙Sは、用紙搬送路115,116,117を通過し、用紙Sの折り目線bが先頭になり用紙の先端部として、第2の停止部材118に当接して進行が遮られるが、搬送を継続する用紙Sの中央部は撓みを形成した後、圧接して駆動回転する一対の折りローラ114,120に挟持され、中央の折り目線aが形成される。
【0028】
なお、用紙先端部の当接する前記停止部材112や最初の用紙折れ部bで形成される先端部の当接する前記停止部材118は、用紙Sの搬送方向長さに対応して移動可能であり、所望の折り目線a,bを形成する。
【0029】
折り目線a,bを形成しZ折り処理された用紙Sは、折りローラ120とその従動ローラ121に挟持されて搬送され、用紙搬送路122を経て再び用紙搬送路117に入る。前記停止部材118は用紙搬送路117から退避状態にあるため、用紙Sは前記停止部材118のあった位置を通過し、搬送ローラ123により搬送され、用紙搬送路124から装置外に排出される。
【0030】
本発明の実施の形態では、前述の用紙後処理装置FSに排出されるようにしてある。
【0031】
前記停止部材112,118はそれぞれプーリ112C,118Cに掛けられて駆動される無端のタイミングベルト112B,118Bにアタッチメントとして取り付けられていて、図4の回路図にも示すように、用紙サイズの入力手段143によって停止位置の調節ができるようにしてあり、そのような機能の他に、特に前記停止部材118はそれが退避して用紙Sが通過しなければならないときにはプーリ118Cが大きく回動して停止部材118が搬送路から外れ搬送路を開放するようにしてある。
【0032】
そしてこのような停止部材118の退避や所定位置への移動は、図4の回路図に示すようにプーリ118Cに掛けられたタイミングベルト118Bの近くの用紙搬送路117に対向して置かれた用紙検知センサ141によって用紙先端(折り目線b)の位置が前進又は後退するのを検知する検知信号で作動させる制御手段140によって行われる。
【0033】
また、小サイズ(例えばA4)は折りを行わず、大サイズ(例えばA3)は折りを行いA4サイズにして混成紙折り操作を行う場合、画像形成装置本体Aの排紙部8から排出された画像形成処理済みの用紙S(例えばA4サイズ)が折り無しにするときは、入口部101に導入され、用紙搬送路102を通過して、搬送ローラ103,104により搬送して、装置外の用紙後処理装置FSに直接排出するようにすると、その直前に搬送されている例えばA3サイズのZ折り紙に当たり、用紙の先頭と後尾が衝突して搬送の邪魔になるので、その場合は切り換え手段105を切り換えてA4サイズ紙を搬送路110A、搬送ローラ110、切り換えゲート111A、第1,第2の折りローラ113,114を通過させ、更に搬送路115,116,117、搬送ローラ123と用紙搬送路124を経て用紙搬送路108から用紙後処理装置FSへ送り込むように制御している。
【0034】
そして、用紙搬送路117,122の片側を形成する案内板130は支点131で回動可能にしてあり、用紙搬送路110Aの片側を形成する案内板135は支点135Aで回動可能にしてあり、用紙搬送路112の片側を形成する案内板112Aは支点112A1で回動可能にしてあり、紙詰まり等が起こっても前記各案内板を回動させてジャム状の用紙を容易に取り出すことが可能になる。しかし従来のように搬送路が三重に配置されるような構成では中側に配置された搬送路に起きた紙詰まり現象を解消するには少なくとも一方の外側の搬送路を外した上でなければジャムになった用紙を取り出して復元させることが非常に困難になるし、三重の搬送路全てを開放可能にすると装置が大型化するという欠点が生ずる。
【0035】
【発明の効果】
本発明により複写機等の画像形成装置で形成される画像形成済みの用紙の折り畳みは簡単確実な構成で取り扱いやすく小型にすることが可能になった。そして画像形成装置が紙折り機能をコンパクトに効率よく連結したり組み込んだりすることが簡単にできるようになり、綴じ付けや編集機能を持たせた後処理器との連結も容易に行われるようになった。
【図面の簡単な説明】
【図1】画像形成装置本体、用紙Z折り装置、用紙後処理装置及び自動原稿送り装置を備えた画像形成装置の全体構成図である。
【図2】Z折り処理される前の用紙の平面図、Z折り処理された用紙の平面図、Z折り処理され更に綴じ処理する状態を示す用紙束の斜視図である。
【図3】本発明の用紙折り装置の実施の形態の一例である用紙Z折り装置の用紙搬送経路を示す断面図である。
【図4】本発明の用紙折り装置における用紙折り長さや用紙の搬送停止や搬送経路の切り換えを制御する制御手段の回路図である。
【符号の説明】
10 入口搬送部
20 シフト処理搬送部(大容量排紙搬送部)
30 第1積載部
40 表紙給紙手段
50 綴じ手段
60 二つ折り手段
102,106,107,110A,111,115,116,117,122,124 用紙搬送路
103,104,110,123 搬送ローラ
112,118 停止部材
112B,118B タイミングベルト
112C,118C プーリ
113,114,120 折りローラ
121 従動ローラ
130,135,112A 案内板
111A1,131,135A,112A1 支点
140 制御手段
141,142 用紙検知センサ
A 画像形成装置本体
B 用紙Z折り装置
FS 用紙後処理装置
S 用紙
a,b 折り目線
[0001]
BACKGROUND OF THE INVENTION
The present invention simplifies the folding mechanism and corrects the folding when an image-formed sheet of an image forming apparatus such as a copying machine is folded, such as a Z-fold, and does not have a problem such as a paper jam. The present invention relates to a sheet folding device that can reliably perform restoration processing.
[0002]
[Prior art]
Conventionally, in a folding mechanism for folding a sheet such as Z-folded, as disclosed in Japanese Utility Model Laid-Open No. 63-190254 and Japanese Patent Laid-Open No. 9-77360, the first folding path, the second folding path, and 2 Since the paper discharge paths after the folding are independently present, a large number of guide members such as guide plates constituting the paper transport path are arranged. The paper path of the folding mechanism in the case of folding the paper on which the image is formed by an image forming apparatus such as a copying machine has a complicated structure by separately forming paths according to the roles in this way. .
[0003]
[Problems to be solved by the invention]
However, even when there is a jam problem such as a paper jam occurring in the folding path located inside the three paper conveyance paths even in the paper folding apparatus, it is difficult for the hand to reach from the outside. It has to be done by removing the transport path, which is troublesome and enormously difficult.
[0004]
SUMMARY OF THE INVENTION It is an object of the present invention to provide a sheet folding apparatus that eliminates the drawbacks of the prior art and has a configuration that is easy to handle and that does not easily cause a failure.
[0005]
[Means for Solving the Problems]
This object is achieved by the following technical means (1) or (2).
[0006]
(1) A sheet conveying unit that conveys an image-formed sheet, a stop member that is provided on the conveyance path so as to stop and abut the leading end of the sheet conveyed by the sheet conveying unit, and the stop member Is a sheet folding device for forming a fold by sandwiching a sheet of paper formed by a pair of rollers composed of two folding rollers, and finally a sheet conveying path of a portion constituting the leading end of the final folding sheet A paper folding apparatus, wherein the folded paper discharge path is the same.
[0007]
(2) a sheet conveying unit that conveys an image-formed sheet, a stop member that is provided on the conveyance path so as to stop and abut the leading end of the sheet conveyed by the sheet conveying unit, and the stop member Is a sheet folding device for forming a fold by sandwiching a sheet of paper formed by a pair of rollers composed of two folding rollers, and finally a sheet conveying path of a portion constituting the leading end of the final folding sheet Detection means for detecting the advance or retreat of the sheet is provided between the pair of rollers for folding the sheet, and the stop member in the folding path is retracted from the folding path based on the detection information of the detection means and finally folded. A paper folding apparatus, comprising a control means for discharging the received paper.
[0008]
Here, the front end portion of the final folded paper is a front fold portion (a crease b, which will be described later), and is a front end portion which determines the position of a fold (a crease a, which will be described later) where the final fold is performed. is there.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
Next, the sheet folding apparatus of the present invention, the sheet post-processing apparatus after folding the sheet, and the image forming apparatus main body connecting them will be described with reference to the accompanying drawings.
[0010]
FIG. 1 is an overall configuration diagram of an image forming apparatus including an image forming apparatus main body A, a sheet Z folding apparatus B, a sheet post-processing apparatus FS, and an automatic document feeder DF.
[0011]
The image forming apparatus main body A shown in the figure includes an image reading unit 1, an image processing unit 2, an image writing unit 3, an image forming unit 4, a cassette paper feeding unit 5, a large capacity paper feeding unit (LCT) 6, a fixing device 7, a discharge device. A paper unit 8 and an automatic double-sided copy paper feeding unit (ADU) 9 are provided.
[0012]
An automatic document feeder DF is mounted on the upper part of the image forming apparatus main body A. A paper Z folding device B and a paper post-processing device FS are connected to the paper discharge unit 8 side on the left side of the image forming apparatus main body A shown in the drawing.
[0013]
The document d placed on the document table of the automatic document feeder DF is conveyed in the direction of the arrow, and an image on one or both sides of the document is read by the optical system of the image reading unit 1 and is read by the CCD image sensor 1A.
[0014]
The analog signal photoelectrically converted by the CCD image sensor 1 </ b> A is subjected to analog processing, A / D conversion, shading correction, image compression processing, and the like in the image processing unit 2, and then sent to the image writing unit 3.
[0015]
In the image writing unit 3, output light from the semiconductor laser is applied to the photosensitive drum of the image forming unit 4 to form a latent image. In the image forming unit 4, processing such as charging, exposure, development, transfer, separation, and cleaning is performed, and the image is transferred to the paper S conveyed from the cassette paper feeding unit 5 or the large capacity paper feeding unit 6. The sheet S carrying the image is fixed by the fixing device 7 and sent directly from the paper discharge unit 8 to the sheet Z folding device B or the sheet post-processing device FS. Alternatively, the single-sided image processed paper S sent to the automatic double-sided copy paper feeding unit 9 by the conveyance path switching plate 8A is again sent from the paper discharge unit 8 to the paper Z folding device B in the image forming unit 4 after double-sided image processing. It is.
[0016]
The paper Z folding device B is formed by folding a paper S twice by a plurality of folding rollers and folding it into a zigzag shape, as shown in FIG.
[0017]
FIG. 2A is a plan view of the paper S before the Z-folding process. A and b shown by broken lines are crease lines.
[0018]
FIG. 2B is a plan view of the sheet S that has been Z-folded. Fold lines a and b are formed and folded on the paper S that has been Z-folded by a plurality of folding rollers of the paper Z folding device B.
[0019]
FIG. 2C is a perspective view of the sheet bundle showing a state in which the Z-folding process is performed and the binding process is further performed. The Z-folded paper S is conveyed into a paper post-processing device FS, which will be described later, and the binding needle 50 is struck by the binding means 50 to form a booklet that has been end-bound.
[0020]
In the paper post-processing device FS shown in FIG. 1, the paper Z is not folded by the paper Z folding device B from the upper stage in the figure, and is stacked through the switching path at the bottom of the paper Z folding device B of the present invention. A fixed paper tray 81 that is collected while being Z-folded by the Z-folding device B, that is, that is not edited and bound, a cover sheet feeding means 40 that is used when editing as a booklet, and a shift The processing conveyance unit (large-capacity discharge conveyance unit) 20, the first stacking unit 30, the binding unit 50, and the bi-folding unit 60 are arranged in a column in a substantially vertical direction.
[0021]
An inlet conveyance unit 10 is disposed on the right side of the sheet post-processing device FS in the drawing. In addition, on the left side of the sheet post-processing device FS in the drawing, a lifting / discharging tray 82 for stacking sheets that have been subjected to edge binding and shift processing, and a fixed discharge tray 83 for stacking sheets that have been subjected to saddle stitching and folding processing, and Is arranged.
[0022]
FIG. 3 is a cross-sectional view showing a sheet conveyance path of a sheet Z folding apparatus B representing an example of the embodiment of the sheet folding apparatus of the present invention.
[0023]
The image-formed paper S discharged from the paper discharge unit 8 of the image forming apparatus main body A is introduced into the inlet unit 101 when the paper folding operation is not performed, passes through the paper conveyance path 102, and is conveyed to the conveyance roller. 103 and 104, and is discharged to the sheet post-processing device FS outside the sheet Z folding device B.
[0024]
In this paper conveyance process, the switching means 105 is held at the position indicated by the broken line in the figure with the solenoid SD10 off, the paper conveyance path 106 is opened, the paper conveyance path 107 is closed, and the paper S is conveyed. The paper can be discharged to the paper post-processing device FS via the path 108.
[0025]
When the sheet Z folding processing mode is set, the switching means 105 is swung by driving the solenoid SD10 and held at the position indicated by the solid line in the figure, the sheet conveying path 106 is closed, and the sheet conveying path 107 is opened. Thus, the sheet S can be conveyed to a pair of rollers composed of folding rollers 113 and 114 for Z-folding.
[0026]
The paper S that has passed through the paper transport path 107 is transported by the transport roller 110 and is guided up to the paper transport path 111, and the leading edge of the paper comes into contact with the first stop member 112 to block the progress. 4 is detected by a paper leading edge detector 142 provided in the vicinity of the first stop member 112, and a fold forming guide 111A is shown at the intermediate portion of the paper S to be continuously conveyed as shown in the circuit diagram of FIG. After being bent from the position indicated by the broken line to the position indicated by the solid line around the fulcrum 111A1 so as to be easily folded, it is sandwiched between a pair of folding rollers 113 and 114 that are driven to rotate while being pressed against each other. A crease line b is formed.
[0027]
The sheet S folded by the crease line b passes through the sheet conveyance paths 115, 116, and 117, and the crease line b of the sheet S comes to the top and comes into contact with the second stop member 118 as the leading end of the sheet. Although the progress is interrupted, the central portion of the sheet S that continues to be conveyed is bent, and is then sandwiched between a pair of folding rollers 114 and 120 that are driven to rotate in contact with each other, thereby forming a central crease line a.
[0028]
The stop member 112 that contacts the leading end of the sheet and the stop member 118 that contacts the leading end formed by the first folded sheet portion b can move in accordance with the length of the sheet S in the transport direction. Desired crease lines a and b are formed.
[0029]
The sheet S formed with the fold lines a and b and subjected to the Z-folding process is nipped and conveyed by the folding roller 120 and its driven roller 121, and enters the sheet conveyance path 117 again via the sheet conveyance path 122. Since the stop member 118 is in the retracted state from the paper conveyance path 117, the paper S passes through the position where the stop member 118 was, is conveyed by the conveyance roller 123, and is discharged out of the apparatus from the paper conveyance path 124.
[0030]
In the embodiment of the present invention, the sheet is discharged to the sheet post-processing device FS.
[0031]
The stop members 112 and 118 are attached as attachments to endless timing belts 112B and 118B driven by pulleys 112C and 118C, respectively. As shown in the circuit diagram of FIG. In addition to such a function, the pulley 118C is largely rotated to stop when the stop member 118 is retracted and the sheet S has to pass therethrough. The member 118 is detached from the transport path so as to open the transport path.
[0032]
Then, the retracting of the stop member 118 and the movement to the predetermined position are performed by the sheet placed opposite to the sheet conveyance path 117 near the timing belt 118B hung on the pulley 118C as shown in the circuit diagram of FIG. This is performed by the control means 140 that is operated by a detection signal that detects whether the position of the leading end of the sheet (fold line b) moves forward or backward by the detection sensor 141.
[0033]
Further, when a small size (for example, A4) is not folded and a large size (for example, A3) is folded to perform A4 size and the mixed sheet folding operation is performed, the sheet is discharged from the sheet discharge unit 8 of the image forming apparatus main body A. When an image-formed sheet S (for example, A4 size) is to be unfolded, the sheet S is introduced into the inlet portion 101, passes through the sheet conveyance path 102, and is conveyed by the conveyance rollers 103 and 104, and is outside the apparatus. If the paper is discharged directly to the post-processing device FS, it hits, for example, an A3-sized Z-folded paper that is being transported immediately before it, and the leading and trailing edges of the paper collide to obstruct the transportation. The A4 size paper is switched to pass through the transport path 110A, the transport roller 110, the switching gate 111A, the first and second folding rollers 113 and 114, and further the transport paths 115 and 11 , 117, is controlled to pump the sheet finisher FS from the sheet conveying path 108 via the conveying roller 123 and the sheet conveying path 124.
[0034]
The guide plate 130 that forms one side of the paper conveyance paths 117 and 122 is rotatable at a fulcrum 131, and the guide plate 135 that forms one side of the paper conveyance path 110A is rotatable at a fulcrum 135A. The guide plate 112A that forms one side of the paper transport path 112 is rotatable at a fulcrum 112A1, and even if a paper jam occurs, the guide plates can be rotated to easily take out jammed paper. become. However, in the conventional configuration in which the conveyance paths are arranged in triplicate, in order to eliminate the paper jam phenomenon occurring in the conveyance path arranged on the inner side, at least one of the outer conveyance paths must be removed. It is very difficult to take out and restore the jammed paper, and if all the triple conveyance paths can be opened, there is a disadvantage that the apparatus becomes large.
[0035]
【The invention's effect】
According to the present invention, folding of an image-formed sheet formed by an image forming apparatus such as a copying machine can be easily handled and reduced in size with a simple and reliable configuration. The image forming apparatus can easily connect and incorporate the paper folding function in a compact and efficient manner, and can easily be connected to a post-processing device having a binding function and an editing function. became.
[Brief description of the drawings]
FIG. 1 is an overall configuration diagram of an image forming apparatus including an image forming apparatus main body, a sheet Z folding apparatus, a sheet post-processing apparatus, and an automatic document feeder.
FIG. 2 is a plan view of a sheet before Z-folding processing, a plan view of the sheet that has been Z-folded, and a perspective view of a sheet bundle that shows a state in which Z-folding processing and further binding processing are performed.
FIG. 3 is a cross-sectional view showing a sheet conveyance path of a sheet Z folding apparatus which is an example of an embodiment of a sheet folding apparatus of the present invention.
FIG. 4 is a circuit diagram of a control unit that controls sheet folding length, sheet conveyance stop, and conveyance path switching in the sheet folding apparatus of the present invention.
[Explanation of symbols]
10 Inlet transport unit 20 Shift processing transport unit (large capacity discharge transport unit)
30 First stacking section 40 Cover sheet feeding means 50 Binding means 60 Folding means 102, 106, 107, 110A, 111, 115, 116, 117, 122, 124 Paper conveying path 103, 104, 110, 123 Conveying roller 112, 118 Stop member 112B, 118B Timing belt 112C, 118C Pulley 113, 114, 120 Folding roller 121 Driven roller 130, 135, 112A Guide plate 111A1, 131, 135A, 112A1 Support point 140 Control means 141, 142 Paper detection sensor A Image forming apparatus Body B Paper Z folding device FS Paper post-processing device S Paper a, b Crease line

Claims (2)

画像形成された用紙を搬送する用紙搬送手段と該用紙搬送手段によって搬送される用紙の先端を当接停止させるべく搬送路に設けた位置調節移動の可能な停止部材と、該停止部材によって形成される用紙の撓みを二つの折りローラで構成されるローラ対に挟み込んで折り目を形成する用紙折り装置であって、最終折りの用紙先端部を構成する部分の用紙搬送路と最終的に折られた用紙の排紙通路とを同一にしたことを特徴とする用紙折り装置。A sheet conveying unit that conveys an image-formed sheet, a stop member that is provided on the conveyance path so as to abut and stop the leading edge of the sheet conveyed by the sheet conveying unit, and the stop member A sheet folding device for forming a fold by sandwiching a sheet of paper between a pair of rollers composed of two folding rollers, and finally folded with a sheet conveyance path of a portion constituting the leading end of the final folding sheet A paper folding device, wherein the paper discharge path is the same. 画像形成された用紙を搬送する用紙搬送手段と該用紙搬送手段によって搬送される用紙の先端を当接停止させるべく搬送路に設けた位置調節移動の可能な停止部材と、該停止部材によって形成される用紙の撓みを二つの折りローラで構成されるローラ対に挟み込んで折り目を形成する用紙折り装置であって、最終折りの用紙先端部を構成する部分の用紙搬送路と最終的に用紙が折られるローラ対との間に用紙が前進又は後退することを検知する検知手段を設け、該検知手段の検知情報に基づいて折り通路内の停止部材を折り通路から退避し最終的に折られた用紙を排紙せしめる制御手段を設けたことを特徴とする用紙折り装置。A sheet conveying unit that conveys an image-formed sheet, a stop member that is provided on the conveyance path so as to abut and stop the leading edge of the sheet conveyed by the sheet conveying unit, and the stop member A paper folding device that forms a crease by sandwiching the bending of the paper to be formed between a pair of rollers composed of two folding rollers. A detecting means for detecting that the paper moves forward or backward is provided between the pair of rollers, and the paper is finally folded by retracting the stop member in the folding path from the folding path based on the detection information of the detecting means. A sheet folding apparatus comprising a control means for discharging the sheet.
JP2001090005A 2001-02-26 2001-03-27 Paper folding device Expired - Fee Related JP3915420B2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
JP2001090005A JP3915420B2 (en) 2001-03-27 2001-03-27 Paper folding device
US10/075,354 US6719680B2 (en) 2001-02-26 2002-02-14 Sheet folding apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2001090005A JP3915420B2 (en) 2001-03-27 2001-03-27 Paper folding device

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JP4189583B2 (en) 2003-07-24 2008-12-03 コニカミノルタビジネステクノロジーズ株式会社 Paper folding device, paper folding method, post-processing device, and image forming system
JP4560419B2 (en) * 2005-02-04 2010-10-13 株式会社リコー Sheet material post-processing apparatus and image forming apparatus
US8585032B2 (en) * 2009-10-30 2013-11-19 Nisca Corporation Sheet folding apparatus and image formation system provided with the apparatus

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