JPH11349181A - Paper sheet carrier device - Google Patents
Paper sheet carrier deviceInfo
- Publication number
- JPH11349181A JPH11349181A JP16330898A JP16330898A JPH11349181A JP H11349181 A JPH11349181 A JP H11349181A JP 16330898 A JP16330898 A JP 16330898A JP 16330898 A JP16330898 A JP 16330898A JP H11349181 A JPH11349181 A JP H11349181A
- Authority
- JP
- Japan
- Prior art keywords
- belt
- sheet
- paper
- rollers
- transport
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Delivering By Means Of Belts And Rollers (AREA)
Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、2個のローラと、
該ローラにより張架され用紙載置部の用紙を吸着搬送す
る搬送ベルトとを備えた用紙搬送装置に関するものであ
る。TECHNICAL FIELD The present invention relates to two rollers,
The present invention relates to a paper transport device provided with a transport belt stretched by the rollers and transporting the paper on the paper mounting portion by suction.
【0002】[0002]
【従来の技術】従来から用紙を負圧により吸引して搬送
する用紙搬送装置としては、2個のローラに張架された
無端状の搬送ベルトを備えたものが知られており、この
搬送ベルト全体には均等に複数の貫通孔が穿設されてお
り、この貫通孔から空気を吸引するために両ローラと搬
送ベルトとの間に吸引ダクトが設けられ、該吸引ダクト
を介して空気を吸引する吸引ファンが設けられていた。
この吸引ファンは、搬送ベルトの貫通孔からその近傍の
空気を吸引し、用紙を搬送ベルトに吸い付け、この用紙
を吸い付けた状態、すなわち、用紙を吸着した状態で用
紙を搬送する。2. Description of the Related Art Conventionally, as a paper transporting device for transporting a paper by sucking it under a negative pressure, a paper transporting device having an endless transporting belt stretched over two rollers is known. A plurality of through holes are evenly formed in the whole, and a suction duct is provided between both rollers and the conveyor belt to suck air from the through holes, and the air is sucked through the suction duct. Suction fan was provided.
The suction fan sucks air in the vicinity thereof from the through hole of the conveyor belt, sucks the sheet to the conveyor belt, and conveys the sheet in a state where the sheet is sucked, that is, in a state where the sheet is sucked.
【0003】このような構造の用紙搬送装置に基づいて
なされたものとして特開平1−104560号公報に記
載されたものがあった。[0003] Japanese Unexamined Patent Publication No. 1-104560 discloses an apparatus based on the paper transport apparatus having such a structure.
【0004】この特開平1−104560号公報のもの
は、用紙の大きさや紙質に応じて吸引ファンの吸引力を
制御するもので、この吸引ファンの変化は、複数個の吸
引ファンを切り換えたり、吸引ファンの回転数を変化さ
せており、小さいサイズの用紙の搬送時に吸引力を増加
させていた。The device disclosed in Japanese Patent Application Laid-Open No. 1-104560 controls the suction force of a suction fan in accordance with the size and quality of the paper. The number of rotations of the suction fan is changed, and the suction force is increased when small-sized paper is conveyed.
【0005】また、特開平5−278894号公報のも
のは、吸引ダクトが用紙搬送方向に沿って上流側の小さ
い部分と下流側の大きな部分とに区画され、それぞれの
部分に別個の吸引ファンが設けられており、このような
構成により上流側の吸引力を強くすることが可能とな
り、搬送される用紙がカールしている場合であっても、
用紙を安定して搬送することを可能としていた。In Japanese Patent Application Laid-Open No. Hei 5-278894, the suction duct is divided into a small portion on the upstream side and a large portion on the downstream side in the paper transport direction, and a separate suction fan is provided for each portion. Is provided, it is possible to increase the suction force on the upstream side by such a configuration, even if the conveyed paper is curled,
This enabled stable transport of paper.
【0006】そして、特開平9−150987号公報の
ものは、搬送ベルト及び搬送する用紙の位置を検出する
位置検出手段を設けるとともに、搬送ベルトの貫通孔を
搬送される用紙の大きさの範囲内に穿設しており、用紙
が貫通孔の穿設された領域上に載置された際、吸引力を
要する搬送状態であることを位置検出手段により検出
し、吸引ファンの吸引力を強くすることによって安定し
て用紙の搬送を行うことを可能としていた。Japanese Unexamined Patent Application Publication No. 9-150987 has a position detecting means for detecting a position of a conveying belt and a sheet to be conveyed, and a position detecting means for detecting a position of a sheet conveyed through a through hole of the conveying belt. When the paper is placed on the area where the through-hole is formed, the position detecting means detects that the sheet is in a transport state requiring a suction force, and increases the suction force of the suction fan. As a result, the paper can be stably conveyed.
【0007】また、搬送ベルトを用いずに用紙の吸着を
行うものとして特開平5−278281号公報に記載さ
れたものがあった。この特開平5−278281号公報
のものは、用紙送りローラとプラテンの間に隙間を設
け、用紙送りローラの外周に凹溝を設けることにより、
用紙が用紙送りローラ上を通過する際に、プラテン下部
に構成されたチャンバー及びチャンバー下部に設けられ
た吸引ファンの駆動によって、用紙送りローラとプラテ
ンの間の隙間及び用紙送りローラの凹溝を通じて用紙を
プラテンに吸引し用紙の搬送を行っていた。[0007] Japanese Patent Application Laid-Open No. Hei 5-278281 discloses a method for adsorbing paper without using a transport belt. In Japanese Patent Application Laid-Open No. 5-278281, a gap is provided between a paper feed roller and a platen, and a concave groove is provided on the outer periphery of the paper feed roller.
When the paper passes over the paper feed roller, the chamber formed at the lower part of the platen and the suction fan provided at the lower part of the chamber are driven to drive the paper to the platen through the gap between the paper feed roller and the platen and the groove of the paper feed roller. The paper has been sucked and conveyed.
【0008】[0008]
【発明が解決しようとする課題】上記のような搬送ベル
トを用いたものにおいては、貫通孔から搬送ベルトの表
面側の空気を吸引することにより用紙を吸着して搬送す
る構造となっていることから、吸引のための吸引ファン
が必要となり、用紙搬送装置が大きくなるとともに、空
気の吸気・排気時に騒音が発生したり、用紙のサイズが
異なる場合、特に小さなサイズの用紙の場合、用紙の位
置していない部分すなわち空気抵抗のない部分より空気
が流入するので小さなサイズの用紙に対しては吸引力が
不充分となり、搬送不良の発生の虞れがあった。In the apparatus using the transport belt as described above, the sheet is sucked and transported by sucking the air on the front side of the transport belt from the through hole. Therefore, a suction fan for suction is required, which increases the size of the paper transport device, generates noise when air is taken in and exhausted, and if the paper size is different, especially if the paper size is small, the paper position Since the air flows in from a portion where the air resistance is not provided, that is, a portion where there is no air resistance, the suction force becomes insufficient for a small-sized sheet, and there is a possibility that conveyance failure may occur.
【0009】また、特開平1−104560号公報及び
特開平5−278894号公報のものにおいては複数個
の吸引ファンを設けているが、上記の用紙搬送装置と同
様に用紙のサイズが小さなサイズの用紙を搬送する場
合、用紙の位置していない部分すなわち空気抵抗のない
部分より空気が流入するので小さなサイズの用紙に対し
ては吸引力が不充分となり、搬送不良の発生の虞れがあ
った。In Japanese Unexamined Patent Publication No. 1-104560 and Japanese Unexamined Patent Publication No. 5-278894, a plurality of suction fans are provided. In the case of transporting a sheet, since air flows in from a portion where the sheet is not located, that is, a portion where there is no air resistance, suction force is insufficient for a small-sized sheet, and there is a possibility that a transport failure may occur. .
【0010】特開平9−150987号公報のものにお
いては、搬送ベルト上に位置する用紙に合わせた貫通孔
を設ける必要があり、搬送する用紙サイズが限定され、
各種サイズの用紙の搬送を行うことができないという問
題を生じる。In the device disclosed in Japanese Patent Application Laid-Open No. 9-150987, it is necessary to provide a through hole in accordance with the sheet positioned on the conveying belt, and the size of the sheet to be conveyed is limited.
There is a problem that paper of various sizes cannot be conveyed.
【0011】そして、特開平5−278281号公報の
ものにおいても、吸引のための吸引ファンが必要とな
り、用紙搬送装置が大きくなるとともに、用紙の先端又
は後端が用紙送りローラ・プラテン間の隙間に達した際
に、吸引ファンによる吸引が行われると用紙がチャンバ
ーに引き込まれ、用紙送りローラに巻き付きジャムを発
生する虞れがあるという問題があった。In Japanese Patent Application Laid-Open No. Hei 5-278281, a suction fan for suction is required, and the size of the paper transport device is increased, and the leading end or the trailing end of the paper is placed in the gap between the paper feed roller and the platen. At this time, if suction by the suction fan is performed, the paper is drawn into the chamber, and there is a problem that the paper may be wrapped around the paper feed roller to cause a jam.
【0012】本発明の用紙搬送装置は上記の問題に鑑み
なされたものであり、搬送ベルトに貫通孔を穿設し、こ
の貫通孔に嵌合する嵌合突起を搬送ベルトを張架するロ
ーラに設け、該ローラの嵌合突起が搬送ベルトの貫通孔
から抜け出るときに生じる吸引力により用紙を吸着し搬
送することで、吸引ファンを備えることなく用紙の吸着
搬送を可能とすることを目的としたものである。The paper transport apparatus of the present invention has been made in view of the above problems, and has a through hole formed in a transport belt, and a fitting protrusion fitted in the through hole is formed on a roller for stretching the transport belt. It is an object of the present invention to adsorb and convey a sheet by a suction force generated when a fitting protrusion of the roller comes out of a through hole of a conveyance belt, thereby enabling adsorption and conveyance of a sheet without a suction fan. Things.
【0013】[0013]
【課題を解決するための手段】上記の目的を達成するた
めに、請求項1記載の用紙搬送装置は、2個のローラ
と、該ローラにより張架され用紙載置部の用紙を吸着搬
送する搬送ベルトとを備え、上記搬送ベルトに複数の貫
通孔を設け、上記2個のローラの用紙載置部に近いロー
ラを他方のローラよりも大きい径に形成し、その周面に
上記貫通孔に嵌合する嵌合突起を形成している。According to a first aspect of the present invention, there is provided a sheet transport apparatus, comprising: two rollers; a roller stretched by the rollers; A plurality of through-holes are provided in the conveyor belt, and a roller closer to the paper mounting portion of the two rollers is formed to have a diameter larger than that of the other roller. A fitting projection for fitting is formed.
【0014】請求項2記載の用紙搬送装置は、2個のロ
ーラと、該ローラにより張架され用紙載置部の用紙を吸
着搬送する搬送ベルトとを備え、上記搬送ベルトに複数
の貫通孔を設け、上記搬送ベルトの内側に当該搬送ベル
トよりも全長が短い2個のローラにより張架された内側
ベルトを設け、該内側ベルトの表面に上記搬送ベルトの
貫通孔に嵌合する嵌合突起を形成している。According to a second aspect of the present invention, there is provided a sheet transport apparatus including two rollers, and a transport belt stretched by the rollers and sucking and transporting the sheet on the sheet placement unit, and a plurality of through holes are formed in the transport belt. An inner belt stretched by two rollers having a shorter overall length than the transport belt is provided inside the transport belt, and a fitting protrusion that fits into a through hole of the transport belt is provided on a surface of the inner belt. Has formed.
【0015】請求項3記載の用紙搬送装置は、上記貫通
孔を搬送ベルトの幅方向の両端部分を除いて形成してい
る。According to a third aspect of the present invention, the through hole is formed except for both ends in the width direction of the conveyor belt.
【0016】請求項4記載の用紙搬送装置は、上記搬送
ベルトの搬送方向に上記貫通孔を形成していない帯領域
を形成し、該搬送ベルトの表面側から当該搬送ベルトの
帯領域に当接する当接ローラを設けている。According to a fourth aspect of the present invention, there is provided a sheet conveying apparatus, wherein a band region in which the through-hole is not formed is formed in the conveying direction of the conveying belt, and the belt region comes into contact with the band region of the conveying belt from the front side of the conveying belt. A contact roller is provided.
【0017】請求項5記載の用紙搬送装置は、上記2個
のローラを同径に形成し、両ローラに嵌合突起を設け、
両ローラ間に搬送ベルトの表面に当接し当該搬送ベルト
を内側へ押圧し用紙搬送路から離間させる離間ローラを
2個設け、該離間ローラの間に画像形成装置の画像形成
部の現像剤像を用紙へ転写する転写器を設けている。According to a fifth aspect of the present invention, in the paper transport apparatus, the two rollers are formed to have the same diameter, and both rollers are provided with fitting projections.
Two separation rollers are provided between the two rollers to contact the surface of the conveyance belt and press the conveyance belt inward to separate the conveyance belt from the sheet conveyance path. The developer image of the image forming unit of the image forming apparatus is provided between the separation rollers. A transfer device for transferring to paper is provided.
【0018】請求項6記載の用紙搬送装置は、2個のロ
ーラと、該ローラにより張架され用紙載置部の用紙を吸
着搬送する搬送ベルトとを備え、上記搬送ベルトに複数
の有底孔を設け、該有底孔の底部に磁石を設け、上記搬
送ベルトの内側に有底孔底部の磁石を吸引する電磁石を
設けている。According to a sixth aspect of the present invention, there is provided a sheet transporting apparatus comprising two rollers, and a transport belt stretched by the rollers and sucking and transporting the sheet on the sheet receiving portion, wherein the transport belt has a plurality of bottomed holes. And a magnet is provided at the bottom of the bottomed hole, and an electromagnet for attracting the magnet at the bottom of the bottomed hole is provided inside the conveyor belt.
【0019】請求項7記載の用紙搬送装置は、上記電磁
石の磁力を搬送される用紙の種類により制御している。According to a seventh aspect of the present invention, the magnetic force of the electromagnet is controlled by the type of the sheet to be transported.
【0020】[0020]
【発明の実施の形態】本発明の用紙搬送装置を用いた電
子写真式複写機を図1とともに説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An electrophotographic copying machine using a paper conveying apparatus according to the present invention will be described with reference to FIG.
【0021】本発明の電子写真式複写機は、複写機本体
1の上面に原稿を載置する原稿台2を設け、複写機本体
1の上部で原稿台2の下部に原稿読取部を設け、該原稿
読取部の下方に画像形成手段である画像形成部を設けて
いる。In the electrophotographic copying machine of the present invention, a document table 2 on which a document is placed is provided on an upper surface of a copying machine body 1, and a document reading section is provided above the copying machine body 1 and below the document table 2. An image forming unit as an image forming unit is provided below the document reading unit.
【0022】この原稿読取部は、原稿に光を照射する光
源3と、原稿から反射した反射光を後述する画像形成部
の感光体ドラム4へ反射し照射する反射ミラー5,6と
から構成されている。The original reading section comprises a light source 3 for irradiating the original with light, and reflection mirrors 5 and 6 for reflecting and reflecting the reflected light from the original to a photosensitive drum 4 of an image forming section described later. ing.
【0023】上記画像形成部は、感光体ドラム4と、感
光体ドラム4の表面を一様に帯電する帯電器7と、帯電
された感光体ドラム4に反射ミラー6から反射光が照射
され形成された静電潛像をトナーにより現像しトナー像
を形成する現像器8と、感光体ドラム4のトナー像を用
紙に転写する転写器9と、感光体ドラム4の電位を除電
する除電器10とから構成されている。The image forming section is formed by irradiating the photosensitive drum 4, a charger 7 for uniformly charging the surface of the photosensitive drum 4, and reflecting light from the reflecting mirror 6 to the charged photosensitive drum 4. A developing unit 8 for developing the formed electrostatic latent image with toner to form a toner image, a transfer unit 9 for transferring the toner image on the photosensitive drum 4 to paper, and a static eliminator 10 for removing the potential of the photosensitive drum 4 It is composed of
【0024】そして、複写機本体1の側部には用紙Pを
収容する給紙カセット11を設け、該給紙カセット11
の用紙を1枚ずつピックアップするピックアップローラ
12を設け、ピックアップローラ12の用紙搬送方向下
流側に一対の用紙搬送ローラ13を設け、転写器9によ
りトナー像が転写される転写部へ用紙搬送ローラ13に
より搬送された用紙を吸着搬送する用紙搬送装置14を
設け、転写部の下流側に一対の搬送ローラ15を設け、
この搬送ローラ15の下流側に用紙に転写されたトナー
像を定着する定着ローラ16を設けるとともに一対の搬
送ローラ17を設け、定着後の用紙Pを排出する一対の
排出ローラ18を設け、排出された用紙Pを集積する排
出トレイ19を設けている。A paper cassette 11 for accommodating paper P is provided on the side of the copying machine main body 1.
A pickup roller 12 for picking up the sheets one by one is provided, a pair of sheet conveyance rollers 13 is provided downstream of the pickup roller 12 in the sheet conveyance direction, and the sheet conveyance rollers 13 are transferred to a transfer portion where the toner image is transferred by the transfer device 9. A paper transport device 14 for sucking and transporting the paper transported by the printer, a pair of transport rollers 15 provided downstream of the transfer unit,
A fixing roller 16 for fixing the toner image transferred to the sheet is provided downstream of the conveying roller 15 and a pair of conveying rollers 17 are provided. A pair of discharge rollers 18 for discharging the sheet P after fixing is provided. An output tray 19 for stacking the stacked sheets P is provided.
【0025】上記用紙搬送装置14の実施形態1を図2
乃至図4とともに説明すると、この用紙搬送装置14は
図に示すように搬送経路の下方に位置する駆動ローラ2
0及び従動ローラ21に張架された搬送ベルト22に複
数の貫通孔23を設け、この貫通孔23に嵌合する嵌合
突起24を駆動ローラ20に設けている。上記駆動ロー
ラ20は用紙搬送方向の上流側に設けられ、当該駆動ロ
ーラ20の径は上記従動ローラ21の径よりも大きな径
に形成され、駆動ローラ20に用紙搬送経路を介して対
向する位置に用紙搬送ローラ25を設けている。FIG. 2 shows the first embodiment of the paper transport device 14.
4 to FIG. 4, the paper transport device 14 is provided with a drive roller 2 located below the transport path as shown in FIG.
A plurality of through-holes 23 are provided in the transport belt 22 stretched over the driven roller 21 and the driven roller 21. The drive roller 20 is provided on the upstream side in the sheet transport direction, and the diameter of the drive roller 20 is formed to be larger than the diameter of the driven roller 21, and is located at a position facing the drive roller 20 via the sheet transport path. A paper transport roller 25 is provided.
【0026】上記構成の動作を説明すると、給紙カセッ
ト11からピックアップローラ12によりピックアップ
された用紙Pの先端が用紙搬送装置14に到達すると、
用紙搬送装置14の搬送ベルト22に用紙Pが吸着し転
写部へ搬送される。The operation of the above configuration will be described. When the leading end of the paper P picked up by the pickup roller 12 from the paper feed cassette 11 reaches the paper transport device 14,
The paper P is attracted to the transport belt 22 of the paper transport device 14 and transported to the transfer unit.
【0027】このとき、図3のa位置で駆動ローラ20
の嵌合突起24が搬送ベルト22の貫通孔23に嵌合
し、この状態がb位置まで継続され、c位置において嵌
合突起24が貫通孔23から抜け出ることにより、吸引
力が生じ用紙Pを吸着する。At this time, the drive roller 20 is set at the position a in FIG.
Is fitted into the through-hole 23 of the conveyor belt 22, and this state is continued up to the position b. At the position c, the fitting protrusion 24 comes out of the through-hole 23, so that a suction force is generated and the paper P is removed. Adsorb.
【0028】すなわち、図4に示すように、駆動ローラ
20の嵌合突起24aは搬送ベルト22の貫通孔23の
最奥部まで嵌合しており、駆動ローラ20の回転により
図左側へ駆動ローラ20及び搬送ベルト22が移動し、
嵌合突起24bに示すように貫通孔23から抜け出し始
め、嵌合突起24cに示すように貫通孔23から抜け出
る。このように嵌合突起24bが貫通孔23から抜け出
すことにより、貫通孔23の表面側(用紙P側)の空気
が貫通孔23内側へ吸い込まれる動きとなり、この貫通
孔23の表面側で吸引力を生じ、この吸引力により用紙
Pを吸着し転写部へ搬送する。That is, as shown in FIG. 4, the fitting projection 24a of the driving roller 20 is fitted to the innermost part of the through hole 23 of the conveyor belt 22, and the driving roller 20 rotates to the left in the figure by rotation of the driving roller 20. 20 and the conveyor belt 22 move,
It starts to get out of the through hole 23 as shown by the fitting projection 24b, and comes out of the through hole 23 as shown by the fitting projection 24c. When the fitting protrusion 24b comes out of the through-hole 23 in this manner, the air on the surface side (paper P side) of the through-hole 23 is sucked into the through-hole 23, and the suction force on the surface side of the through-hole 23. Then, the sheet P is sucked by the suction force and is conveyed to the transfer section.
【0029】この際、吸引力は個々の貫通孔23で生じ
るので、搬送する用紙Pのサイズによって貫通孔23で
生じる吸引力が異なることはなく、どのようなサイズの
用紙Pであっても安定した状態で吸着搬送することがで
きる。At this time, since the suction force is generated in each through-hole 23, the suction force generated in the through-hole 23 does not vary depending on the size of the paper P to be conveyed, and the paper P of any size is stable. In this state, it can be conveyed by suction.
【0030】本発明の用紙搬送装置の実施形態2を図5
とともに説明すると、搬送ベルト22の用紙搬送方向の
両端部分の領域B1,B2を除いて領域Aの部分のみに
貫通孔23を設けている。この際、搬送ベルト22の領
域Aの幅を搬送用紙の最大幅と同一の幅に形成し、この
領域Aの両側に領域B1,B2を形成している。そし
て、搬送ベルト22の領域B1,B2に対向する駆動ロ
ーラ23の両側に嵌合突起24を形成していない領域C
を形成している。FIG. 5 shows a second embodiment of the paper conveying apparatus of the present invention.
In other words, the through holes 23 are provided only in the area A except for the areas B1 and B2 at both ends of the conveyor belt 22 in the sheet conveying direction. At this time, the width of the area A of the transport belt 22 is formed to be the same as the maximum width of the transport paper, and the areas B1 and B2 are formed on both sides of the area A. An area C in which the fitting projections 24 are not formed on both sides of the drive roller 23 facing the areas B1 and B2 of the transport belt 22.
Is formed.
【0031】このような構成にすることにより、搬送ベ
ルト22は両端部分(領域B1,B2)に貫通孔23が
穿設されていないので、この両端部分の機械強度を増す
ことによって、結果的に搬送ベルト22の機械強度を強
くすることができる。With such a configuration, the transport belt 22 has no through-holes 23 at both ends (regions B1 and B2). Therefore, by increasing the mechanical strength of both ends, consequently, The mechanical strength of the transport belt 22 can be increased.
【0032】本発明の用紙搬送装置の実施形態3を図6
とともに説明すると、搬送ベルト22の用紙搬送方向の
両端部分の領域B1,B2及び中央部分の領域Eを除い
た領域B1と領域Aとの間の領域D1と領域Eと領域B
2との間の領域D2の部分に貫通孔23を設けている。
この際、搬送ベルト22の領域D1〜D2の幅を搬送用
紙の最大幅と同一の幅に形成し、この領域D1,D2の
両側に領域B1,B2を形成している。そして、搬送ベ
ルト22の領域B1,B2,Eに対向する駆動ローラ2
3の両側及び中央部に嵌合突起24を形成していない領
域Cを形成している。FIG. 6 shows a third embodiment of the sheet conveying apparatus of the present invention.
To be more specific, the areas D1, E, and B between the areas B1 and A excluding the areas B1 and B2 at both ends of the conveyor belt 22 in the sheet conveyance direction and the area E at the center are described.
2, a through-hole 23 is provided in a portion of a region D2.
At this time, the width of the areas D1 and D2 of the transport belt 22 is formed to be the same as the maximum width of the transport paper, and the areas B1 and B2 are formed on both sides of the areas D1 and D2. Then, the driving roller 2 facing the areas B1, B2, and E of the transport belt 22
A region C in which the fitting protrusion 24 is not formed is formed on both sides and a center of 3.
【0033】また、搬送ベルト22の搬送方向に対する
中央より従動ローラ21側よりに、当該搬送ベルト22
の領域B1,B2,E表面に当接し用紙を搬送ベルト2
2とともに挟持する用紙押さえローラ26を設け、この
用紙押さえローラ26を回動自在に回動軸27で軸支し
ている。Further, the conveying belt 22 is moved from the center of the conveying belt 22 in the conveying direction to the driven roller 21 side.
The belt is brought into contact with the surfaces B1, B2, E of
2, a paper pressing roller 26 is provided, and the paper pressing roller 26 is rotatably supported by a rotating shaft 27.
【0034】このような構成にすることにより、搬送ベ
ルト22は両端部分及び中央部(領域B1,B2,E)
に貫通孔23が穿設されていないので、この両端部分及
び中央部の機械強度を増すことによって、結果的に搬送
ベルト22の機械強度を強くすることができ、しかも、
用紙押さえローラ26で用紙Pを押さえるので、搬送ベ
ルト22と用紙Pとの密着性をより確実なものとするこ
とができ、用紙Pをより安定した状態で搬送することが
できる。By adopting such a configuration, the transport belt 22 has both end portions and a central portion (regions B1, B2, E).
Since the through-holes 23 are not formed, the mechanical strength of the conveyor belt 22 can be increased by increasing the mechanical strength at both end portions and the central portion.
Since the paper P is pressed by the paper pressing roller 26, the adhesion between the transport belt 22 and the paper P can be further ensured, and the paper P can be transported in a more stable state.
【0035】本発明の用紙搬送装置の実施形態4を図7
及び図8とともに説明すると、搬送ベルト22の内側に
駆動ローラ20と搬送ベルト22の内側に設けられた第
2従動ローラ27とに張架されて内側ベルト29が設け
られ、この内側ベルト29の表面側(搬送ベルト22
側)に搬送ベルト22の貫通孔23に嵌合する嵌合突起
30を設けている。FIG. 7 shows a fourth embodiment of the sheet conveying apparatus of the present invention.
8, the inner belt 29 is provided on the inner side of the transport belt 22 by being stretched between the driving roller 20 and the second driven roller 27 provided on the inner side of the transport belt 22. Side (conveyor belt 22
On the side), a fitting protrusion 30 that fits into the through hole 23 of the conveyor belt 22 is provided.
【0036】この際、駆動ローラ20と従動ローラ21
の径を同じ径に形成し、第2従動ローラ28の径のみを
他のローラの径より小さく形成することにより、内側ベ
ルト29の嵌合突起30の搬送ベルト22の貫通孔23
の抜け出し(離脱)を可能としている。At this time, the driving roller 20 and the driven roller 21
Are formed to have the same diameter, and only the diameter of the second driven roller 28 is made smaller than the diameters of the other rollers.
Can escape (disengage).
【0037】このような構成にすることにより、嵌合突
起30の貫通孔23からの離脱開始位置(抜け出しを開
始する位置)と完全離脱位置(完全に抜け出した位置)
との距離を長くすることができ、広い(長い)作用範囲
で用紙Pに対する吸引力を作用させることができ、用紙
Pの搬送状態を安定させることができる。By adopting such a configuration, the position at which the fitting projection 30 is separated from the through hole 23 (position at which the protrusion is started) and the completely separated position (the position at which the fitting protrusion 30 is completely removed).
, The suction force on the sheet P can be applied in a wide (long) working range, and the conveyance state of the sheet P can be stabilized.
【0038】本発明の用紙搬送装置の実施形態5を図9
とともに説明すると、駆動ローラ20と同径の嵌合突起
が設けられた第2駆動ローラ31を転写器9の用紙搬送
方向下流側に設け、該第2駆動ローラ31の用紙搬送方
向下流側に従動ローラ21を設け、駆動ローラ20と第
2駆動ローラ31の夫々の駆動軸を駆動ベルト32で連
結し両ローラが連動するようになっている。FIG. 9 shows a fifth embodiment of the sheet conveying apparatus of the present invention.
To be more specific, a second drive roller 31 provided with a fitting protrusion having the same diameter as the drive roller 20 is provided downstream of the transfer device 9 in the paper transport direction, and is driven by the second drive roller 31 downstream of the paper transport direction. A roller 21 is provided, and the respective drive shafts of the drive roller 20 and the second drive roller 31 are connected by a drive belt 32 so that both rollers are interlocked.
【0039】そして、転写器9の用紙搬送方向上流側及
び下流側に搬送ベルト22の表面側に当接して搬送ベル
ト22を転写器9から離間させる離間ローラ33,34
を設けている。Separation rollers 33 and 34 are provided on the upstream side and the downstream side of the transfer unit 9 in the sheet conveyance direction to contact the front side of the conveyance belt 22 to separate the conveyance belt 22 from the transfer unit 9.
Is provided.
【0040】このような構成にすることにより、転写器
9の用紙搬送方向上流側及び下流側の2カ所で、駆動ロ
ーラ20及び第2駆動ローラ31の嵌合突起が搬送ベル
ト22の貫通孔から離脱することにより生じる吸引力で
用紙Pを搬送ベルト22へ吸着し搬送させることによ
り、搬送ベルト22上でトナー像の用紙Pへの加圧や加
熱による転写が行われることがなく、転写時の圧力や熱
による搬送ベルト22(貫通孔23)の変形を防ぐこと
ができ、搬送ベルト22(貫通孔23)の変形により貫
通孔23と嵌合突起との嵌合精度の低下による吸引力の
低下を防止することができ、安定した状態で用紙Pの搬
送を行うことができる。With such a configuration, the fitting protrusions of the drive roller 20 and the second drive roller 31 are moved from the through-hole of the transport belt 22 at two locations on the upstream side and the downstream side of the transfer unit 9 in the paper transport direction. By adsorbing and transporting the paper P to the transport belt 22 with the suction force generated by the detachment, the toner image is not transferred onto the transport belt 22 by pressurization or heating on the transport belt 22, and the transfer of the toner image on the transport belt 22 is not performed. The deformation of the conveyor belt 22 (through-hole 23) due to pressure or heat can be prevented, and the deformation of the conveyor belt 22 (through-hole 23) lowers the suction force due to lower fitting accuracy between the through-hole 23 and the fitting protrusion. Can be prevented, and the paper P can be transported in a stable state.
【0041】本発明の用紙搬送装置の実施形態6を図1
0及び図11とともに説明すると、搬送ベルト22に複
数の有底孔35を設け、この有底孔35の底部に磁石3
6を設け、搬送ベルト22の内側に電磁石37を配設
し、搬送ベルト22に用紙搬送路を介して対向当接し用
紙Pを搬送ベルト22へ押圧する用紙押さえローラ25
を設けている。上記搬送ベルト22を張架している駆動
ローラ20には嵌合突起は設けられていない。Embodiment 6 of the sheet transporting apparatus of the present invention is shown in FIG.
11 and FIG. 11, the conveyor belt 22 is provided with a plurality of bottomed holes 35, and a magnet 3 is provided at the bottom of the bottomed hole 35.
6, an electromagnet 37 is disposed inside the conveyor belt 22, and a sheet pressing roller 25 that opposes the conveyor belt 22 via a sheet conveyance path and presses the sheet P against the conveyor belt 22.
Is provided. The drive roller 20 on which the transport belt 22 is stretched has no fitting projection.
【0042】このような構成にすることにより、電磁石
37の磁力により搬送ベルト22の有底孔35に設けら
れた磁石が電磁石37側へ引き付けられ、搬送ベルト2
2が電磁石37側へ引き付けられることにより用紙P側
に負圧を生じ、この負圧により用紙Pを吸着している。With this configuration, the magnet provided in the bottomed hole 35 of the conveyor belt 22 is attracted toward the electromagnet 37 by the magnetic force of the electromagnet 37, and
2 is attracted to the electromagnet 37 side, so that a negative pressure is generated on the sheet P side, and the sheet P is attracted by the negative pressure.
【0043】この際、搬送する用紙Pの種類によって電
磁石37への通電量を制御し、電磁石37の磁力を制御
することにより、搬送ベルト22の電磁石37側への引
き付けられる力を制御し、搬送ベルト22の用紙P側に
発生する負圧を用紙Pの種類に対応して変化させること
により、用紙Pの種類に関係なく安定した状態で用紙P
の搬送を行うことができる。At this time, the amount of power to the electromagnet 37 is controlled according to the type of the paper P to be conveyed, and the magnetic force of the electromagnet 37 is controlled, so that the force of the conveyor belt 22 attracted to the electromagnet 37 is controlled. By changing the negative pressure generated on the side of the paper P of the belt 22 in accordance with the type of the paper P, the paper P is stably maintained regardless of the type of the paper P.
Can be transported.
【0044】[0044]
【発明の効果】請求項1記載の用紙搬送装置によれば、
駆動ローラの嵌合突起が搬送ベルトの貫通孔から抜け出
る際に、貫通孔の表面側(用紙側)の空気が貫通孔内側
へ吸い込まれる動きとなり、この貫通孔の表面側で吸引
力が生じ、この吸引力により用紙を吸着する。このよう
に、このとき生じる吸引力は個々の貫通孔で生じている
ので、搬送する用紙のサイズによって貫通孔で生じる吸
引力が異なることはなく、どのようなサイズの用紙であ
っても安定した状態で吸着搬送することができる。ま
た、用紙を吸引するための別部材を設ける必要がないの
で、用紙搬送装置を小型化することができる。According to the paper conveying apparatus of the first aspect,
When the fitting protrusion of the drive roller comes out of the through hole of the conveyor belt, the air on the surface side (paper side) of the through hole is moved into the inside of the through hole, and a suction force is generated on the surface side of the through hole. The paper is attracted by this suction force. As described above, since the suction force generated at this time is generated in the individual through-holes, the suction force generated in the through-hole does not differ depending on the size of the sheet to be conveyed, and stable regardless of the size of the sheet. It can be sucked and transported in the state. Further, since there is no need to provide a separate member for sucking the paper, the paper transport device can be downsized.
【0045】請求項2記載の用紙搬送装置によれば、内
側ベルトに搬送ベルトの貫通孔に嵌合する嵌合突起を設
けているので、嵌合突起の貫通孔からの離脱開始位置
(抜け出しを開始する位置)と完全離脱位置(完全に抜
け出した位置)との距離を長くすることができ、広い
(長い)作用範囲で用紙Pに対する吸引力を作用させる
ことができ、用紙の搬送状態を安定されることができ
る。According to the second aspect of the present invention, since the inner belt is provided with the fitting projection which fits into the through-hole of the transport belt, the detachment start position of the fitting projection from the through-hole (the position at which the fitting projection comes out) is determined. The distance between the start position) and the completely detached position (the position where the sheet completely exits) can be increased, and a suction force can be applied to the sheet P in a wide (long) working range, so that the sheet conveyance state can be stabilized. Can be done.
【0046】請求項3記載の用紙搬送装置によれば、搬
送ベルトの両端部を除いて貫通孔を形成しているので、
この両端部分の機械強度を増すことによって、結果的に
搬送ベルトの機械強度を強くすることができる。According to the third aspect of the present invention, since the through holes are formed except for both ends of the conveyor belt,
By increasing the mechanical strength at both ends, the mechanical strength of the transport belt can be increased as a result.
【0047】請求項4記載の用紙搬送装置によれば、搬
送ベルトの搬送方向に貫通孔を形成していない帯領域を
設け、この帯領域に当接する当接ローラを設けることに
より、帯領域によって搬送ベルトの機械強度を強くする
ことができ、しかも、当接ローラで用紙を押圧し搬送ベ
ルトと用紙との密着性をより確実なものとすることがで
き、用紙をより安定した状態で搬送することができる。According to the paper transport apparatus of the fourth aspect, by providing a belt area in which a through hole is not formed in the transport direction of the transport belt and providing a contact roller in contact with the belt area, The mechanical strength of the transport belt can be increased, and the paper can be pressed by the contact roller to ensure the adhesion between the transport belt and the paper, and the paper can be transported in a more stable state. be able to.
【0048】請求項5記載の用紙搬送装置によれば、搬
送ベルトを張架する2個の同径のローラに嵌合突起を設
け、搬送ベルトの表面側に当接して搬送ベルトを用紙搬
送路から離間させる離間ローラを設け、この離間ローラ
の間に画像形成部の転写器を設けることにより、転写器
の用紙搬送方向上流側及び下流側の2カ所で用紙の吸着
を行うことができるので、安定した状態で用紙の搬送を
行うことができ、しかも、搬送ベルト上で現像剤像の用
紙への加圧や加熱による転写が行われることがなく、転
写時の圧力や熱による搬送ベルトの変形を防ぐことがで
き、搬送ベルトの変形により貫通孔と嵌合突起との嵌合
精度の低下による吸引力の低下を防止することができ、
安定した状態で用紙の搬送を行うことができる。According to the fifth aspect of the present invention, two protrusions having the same diameter are provided on the two rollers of the same diameter which stretch the transport belt, and the transport belt is brought into contact with the front side of the transport belt so that the transport belt is moved. By providing a separation roller that separates the transfer roller from the transfer roller, and by providing a transfer unit of the image forming unit between the separation rollers, the sheet can be suctioned at two locations on the upstream side and the downstream side in the sheet conveyance direction of the transfer unit. The paper can be transported in a stable state, and the transfer of the developer image to the paper by pressing or heating is not performed on the transport belt. Can be prevented, and a decrease in suction force due to a decrease in fitting accuracy between the through hole and the fitting projection due to deformation of the transport belt can be prevented,
Paper can be transported in a stable state.
【0049】請求項6記載の用紙搬送装置によれば、搬
送ベルトの有底孔の底部に設けられた磁石を電磁石によ
り吸引することにより、用紙を吸着する吸着力を発生さ
せているので、貫通孔と嵌合突起の嵌合・離脱による摩
耗をなくすことができ、摩耗による吸着性能の低下を防
止することができる。According to the paper conveying apparatus of the present invention, the magnet provided at the bottom of the bottomed hole of the conveying belt is attracted by the electromagnet to generate the attraction force for adsorbing the paper. Wear due to fitting and disengagement of the hole and the fitting projection can be eliminated, and a decrease in suction performance due to wear can be prevented.
【0050】請求項7記載の用紙搬送装置によれば、搬
送する用紙の種類によって電磁石の磁力を制御すること
により、搬送ベルトの用紙側に発生する吸着力を用紙の
種類に対応して変化させることができるので、用紙の種
類に関係なく安定した状態で用紙の搬送を行うことがで
きる。According to the sheet conveying apparatus of the present invention, the magnetic force of the electromagnet is controlled according to the type of the sheet to be conveyed, so that the attraction force generated on the sheet side of the conveying belt is changed according to the type of the sheet. Therefore, the paper can be transported in a stable state regardless of the type of the paper.
【図1】本発明の用紙搬送装置を用いた電子写真式複写
機の断面図である。FIG. 1 is a cross-sectional view of an electrophotographic copying machine using a sheet conveying device of the present invention.
【図2】本発明の用紙搬送装置の実施形態1を示す斜視
図である。FIG. 2 is a perspective view showing Embodiment 1 of the sheet conveying device of the present invention.
【図3】図2の断面図である。FIG. 3 is a sectional view of FIG. 2;
【図4】図2の要部拡大断面図である。FIG. 4 is an enlarged sectional view of a main part of FIG. 2;
【図5】本発明の用紙搬送装置の実施形態2を示す斜視
図である。FIG. 5 is a perspective view showing a sheet conveying device according to a second embodiment of the present invention.
【図6】本発明の用紙搬送装置の実施形態3を示す斜視
図である。FIG. 6 is a perspective view illustrating a third embodiment of the paper transport apparatus of the present invention.
【図7】本発明の用紙搬送装置の実施形態4の断面図で
ある。FIG. 7 is a cross-sectional view of Embodiment 4 of the sheet conveying device of the present invention.
【図8】図7の要部拡大図である。FIG. 8 is an enlarged view of a main part of FIG. 7;
【図9】本発明の用紙搬送装置の実施形態5の断面図で
ある。FIG. 9 is a cross-sectional view of Embodiment 5 of the sheet conveying device of the present invention.
【図10】本発明の用紙搬送装置の実施形態6の断面図
である。FIG. 10 is a cross-sectional view of Embodiment 6 of the sheet conveying device of the present invention.
【図11】図10の要部拡大図である。FIG. 11 is an enlarged view of a main part of FIG. 10;
14 20 駆動ローラ 21 従動ローラ 22 搬送ベルト 23 貫通孔 24 嵌合突起 14 20 Drive roller 21 Follower roller 22 Conveyor belt 23 Through hole 24 Fitting protrusion
Claims (7)
れ用紙載置部の用紙を吸着搬送する搬送ベルトとを備え
た用紙搬送装置において、 上記搬送ベルトに複数の貫通孔を設け、 上記2個のローラの用紙載置部に近いローラを他方のロ
ーラよりも大きい径に形成し、その周面に上記貫通孔に
嵌合する嵌合突起を形成したことを特徴とする用紙搬送
装置。1. A paper transport device comprising: two rollers; and a transport belt stretched by the rollers and transporting a sheet on a sheet placement unit by suction, wherein a plurality of through holes are provided in the transport belt; A sheet conveying device, wherein a roller closer to a sheet mounting portion of two rollers is formed to have a diameter larger than that of the other roller, and a fitting protrusion is formed on a peripheral surface thereof so as to fit into the through hole.
れ用紙載置部の用紙を吸着搬送する搬送ベルトとを備え
た用紙搬送装置において、 上記搬送ベルトに複数の貫通孔を設け、 上記搬送ベルトの内側に当該搬送ベルトよりも全長が短
い2個のローラにより張架された内側ベルトを設け、 該内側ベルトの表面に上記搬送ベルトの貫通孔に嵌合す
る嵌合突起を形成したことを特徴とする用紙搬送装置。2. A paper transport device comprising two rollers and a transport belt stretched by said rollers and sucking and transporting a sheet on a paper placement unit, wherein said transport belt is provided with a plurality of through holes, An inner belt stretched by two rollers having a shorter overall length than the conveyor belt is provided inside the conveyor belt, and a fitting projection is formed on a surface of the inner belt to fit into a through hole of the conveyor belt. A paper transport device characterized by the above-mentioned.
部分を除いて形成したことを特徴とする請求項1若しく
は請求項2記載の用紙搬送装置。3. The sheet conveying device according to claim 1, wherein the through holes are formed except for both end portions in a width direction of the conveying belt.
を形成していない帯領域を形成し、 該搬送ベルトの表面側から当該搬送ベルトの帯領域に当
接する当接ローラを設けたことを特徴とする請求項1若
しくは請求項2記載の用紙搬送装置。4. A belt region in which the through-hole is not formed in the transport direction of the transport belt, and a contact roller that contacts the belt region of the transport belt from the front side of the transport belt is provided. 3. The sheet transport device according to claim 1, wherein
ーラに嵌合突起を設け、 両ローラ間に搬送ベルトの表面に当接し当該搬送ベルト
を内側へ押圧し用紙搬送路から離間させる離間ローラを
2個設け、 該離間ローラの間に画像形成装置の画像形成部の現像剤
像を用紙へ転写する転写器を設けたことを特徴とする請
求項1記載の用紙搬送装置。5. The two rollers are formed to have the same diameter, fitting projections are provided on both rollers, the two rollers are brought into contact with the surface of a transport belt, press the transport belt inward, and separate from the paper transport path. 2. The sheet conveying device according to claim 1, wherein two separating rollers are provided, and a transfer device for transferring a developer image of an image forming unit of the image forming apparatus to a sheet is provided between the separating rollers.
れ用紙載置部の用紙を吸着搬送する搬送ベルトとを備え
た用紙搬送装置において、 上記搬送ベルトに複数の有底孔を設け、 該有底孔の底部に磁石を設け、 上記搬送ベルトの内側に有底孔底部の磁石を吸引する電
磁石を設けたことを特徴とする用紙搬送装置。6. A paper transport device comprising two rollers and a transport belt stretched by said rollers and sucking and transporting a sheet on a paper placing section, wherein said transport belt is provided with a plurality of bottomed holes, A sheet conveying device, wherein a magnet is provided at the bottom of the bottomed hole, and an electromagnet for attracting the magnet at the bottom of the bottomed hole is provided inside the conveyor belt.
類により制御したことを特徴とする請求項5記載の用紙
搬送装置。7. The sheet conveying apparatus according to claim 5, wherein the magnetic force of the electromagnet is controlled according to the type of the sheet to be conveyed.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16330898A JP3431834B2 (en) | 1998-06-11 | 1998-06-11 | Paper transport device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP16330898A JP3431834B2 (en) | 1998-06-11 | 1998-06-11 | Paper transport device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH11349181A true JPH11349181A (en) | 1999-12-21 |
JP3431834B2 JP3431834B2 (en) | 2003-07-28 |
Family
ID=15771370
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP16330898A Expired - Fee Related JP3431834B2 (en) | 1998-06-11 | 1998-06-11 | Paper transport device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3431834B2 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006159506A (en) * | 2004-12-03 | 2006-06-22 | Duplo Seiko Corp | Platemaking device of stencil printing machine and initial setting method for original stencil paper to platemaking device |
EP3381845A1 (en) * | 2017-03-28 | 2018-10-03 | OCE Holding B.V. | Sheet support structure |
-
1998
- 1998-06-11 JP JP16330898A patent/JP3431834B2/en not_active Expired - Fee Related
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006159506A (en) * | 2004-12-03 | 2006-06-22 | Duplo Seiko Corp | Platemaking device of stencil printing machine and initial setting method for original stencil paper to platemaking device |
JP4689253B2 (en) * | 2004-12-03 | 2011-05-25 | デュプロ精工株式会社 | Stencil printing machine |
EP3381845A1 (en) * | 2017-03-28 | 2018-10-03 | OCE Holding B.V. | Sheet support structure |
Also Published As
Publication number | Publication date |
---|---|
JP3431834B2 (en) | 2003-07-28 |
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