JP2799023B2 - Sheet paper transport device - Google Patents
Sheet paper transport deviceInfo
- Publication number
- JP2799023B2 JP2799023B2 JP2010397A JP1039790A JP2799023B2 JP 2799023 B2 JP2799023 B2 JP 2799023B2 JP 2010397 A JP2010397 A JP 2010397A JP 1039790 A JP1039790 A JP 1039790A JP 2799023 B2 JP2799023 B2 JP 2799023B2
- Authority
- JP
- Japan
- Prior art keywords
- sheet paper
- sheet
- paper transport
- roller
- conveying
- 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.)
- Expired - Fee Related
Links
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
Description
【発明の詳細な説明】 〔概要〕 像形成装置のシート紙を搬送する装置に関し、 ジャムの発生を防止可能とすることを目的とし、 シート紙処理部に対向した位置に設けられ、シート紙
処理部の処理区間をシート紙を吸着して搬送するシート
紙搬送装置であって、 周囲に複数の孔を有し、シート紙を搬送する方向に回
転されるローラと、中空であり、中空の部分が負圧源と
連通してあり、該ローラを回転可能に支持し、シート紙
が搬送されるシート紙搬送面側に開口を有する中空固定
中心軸とよりなり、ローラが回転することにより、ロー
ラの周囲の孔が順次上記開口と連通し、該連通した孔が
吸引作用を行い、上記シートを吸着して搬送するシート
紙搬送ローラ組立体が、シート紙の搬送方向上、シート
紙処理部の入口側の位置と排出側の位置とに配され、 シート紙処理部の入口側の位置に配されたシート紙搬
送ローラ組立体は、上記中空固定中心軸の開口を、該中
空固定中心軸の中心を通り上記シート紙搬送面に垂直な
面に対してシート紙搬送方向とは逆の方向に偏倚して設
け、 シート紙処理部の排出側の位置に配されたシート紙搬
送ローラ組立体は、上記中空固定中心軸の開口を、該中
空固定中心軸の中心を通り上記シート紙搬送面に垂直な
面に対してシート紙搬送方向に偏倚して設けて構成す
る。DETAILED DESCRIPTION OF THE INVENTION [Summary] The present invention relates to an apparatus for conveying sheet paper of an image forming apparatus, which is provided at a position opposed to a sheet paper processing section, for the purpose of preventing the occurrence of a jam. A sheet paper conveying device that adsorbs and conveys a sheet of paper through a processing section of a unit, the roller having a plurality of holes around the roller being rotated in the direction of conveying the sheet of paper, and a hollow and hollow portion Is connected to a negative pressure source, rotatably supports the roller, and comprises a hollow fixed central shaft having an opening on the side of the sheet paper conveying surface on which the sheet paper is conveyed. Are sequentially communicated with the opening, and the communicated holes perform a suction action, and a sheet paper transport roller assembly that sucks and transports the sheet is provided in the sheet paper processing unit in the sheet paper transport direction. Inlet position and discharge side A sheet transport roller assembly disposed at a position on the entrance side of the sheet processing section, wherein the sheet transport surface extends through the opening of the hollow fixed central axis through the center of the hollow fixed central axis. The sheet paper transport roller assembly provided at a position on the discharge side of the sheet paper processing section is provided so as to be deviated from the plane perpendicular to the sheet paper transport direction. Are provided so as to be deviated in the sheet paper transport direction with respect to a plane passing through the center of the hollow fixed central axis and perpendicular to the sheet paper transport plane.
本発明は像形成装置のシート紙を搬送する装置に関す
る。The present invention relates to an apparatus for conveying sheet paper of an image forming apparatus.
第５図は、用紙としてシート紙１が使われ、定着器と
して閃光定着器２が採用されている像形成装置３を示
す。FIG. 5 shows an image forming apparatus 3 in which a sheet paper 1 is used as a sheet and a flash fixing device 2 is employed as a fixing device.
４は感光ドラムであり、この周囲に、クリーナ5,前帯
電器6,露光器7,現像器8,転写器９等が配設してある。Reference numeral 4 denotes a photosensitive drum, around which a cleaner 5, a pre-charger 6, an exposure unit 7, a developing unit 8, a transfer unit 9, and the like are arranged.
感光ドラム４が矢印Ａ方向に回転されて最初に潜像、
次いでトナー像が形成される。またシート紙１が給紙部
（図示せず）から矢印Ｂ方向に供給され、転写器９によ
りトナー像が定着される。When the photosensitive drum 4 is rotated in the direction of arrow A, the latent image
Next, a toner image is formed. Further, the sheet paper 1 is supplied from a paper supply unit (not shown) in the direction of arrow B, and the transfer unit 9 fixes the toner image.
その後、シート紙１は、閃光定着器２の下側にこれと
近接対向して配設されているシート紙搬送装置10により
定着器２の下側を矢印Ｃ方向に搬送され、この過程で、
定着器２の閃光ランプ11により閃光定着される。12はシ
ート紙が搬送される面を示す。Thereafter, the sheet paper 1 is conveyed in the direction of arrow C below the fixing device 2 by a sheet paper conveying device 10 disposed below and adjacent to and facing the flash fixing device 2.
Flash fixing is performed by the flash lamp 11 of the fixing device 2. Reference numeral 12 denotes a surface on which the sheet paper is conveyed.
次いで、シート紙１は、排出ローラ13によりスタッカ
部（図示せず）へ排出される。Next, the sheet paper 1 is discharged by a discharge roller 13 to a stacker unit (not shown).
閃光定着器２とシート紙搬送装置10との間の隙間ｇ
は、一般に狭い。The gap g between the flash fixing device 2 and the sheet paper conveying device 10
Is generally narrow.
一方、定着器２の下面には小なる段部14が存在するこ
とがある。第５図においては、板金の折り曲げ部15等に
より、排出ローラ13側寄りに形成されている。On the other hand, a small step 14 may be present on the lower surface of the fixing device 2. In FIG. 5, it is formed near the discharge roller 13 side by a bent portion 15 of a sheet metal or the like.
このため、シート紙１は搬送方向上先頭側の端が上記
段部14に引っ掛かってジャムを起こすことがある。For this reason, the sheet paper 1 may be jammed when the leading end in the transport direction is caught by the step portion 14.
段部14が僅かの大きさであっても、シート紙は引っ掛
かりを起こす。従って、定着器２の下面をシート紙が引
っ掛かりを起こさない程度にまで平面とすることは困難
である。Even if the step 14 is slightly sized, the sheet of paper will get caught. Therefore, it is difficult to make the lower surface of the fixing device 2 flat to such an extent that the sheet paper is not caught.
そこで、シート紙搬送装置10を、シート紙１をジャム
を起こさないように搬送し得る構成とする必要がある。Therefore, the sheet paper transport device 10 needs to be configured to be able to transport the sheet paper 1 without causing a jam.
また、近年、像形成装置の動作が高速化しつつあり、
シート紙の搬送速度も高速化されつつある。In recent years, the operation of the image forming apparatus has been increasing in speed,
The transport speed of sheet paper is also increasing.
シート紙の搬送が高速化すると、それだけ搬送中のシ
ート紙の状態が不安定となり易く、ジャムを起こし易く
なる。If the speed of the conveyance of the sheet paper is increased, the state of the sheet paper being conveyed is likely to be unstable and a jam is likely to occur.
この点からも、シート紙搬送装置10をより信頼性の高
いものに改良する必要がある。From this point as well, it is necessary to improve the sheet paper transport device 10 to be more reliable.
第６図は、従来のシート紙搬送装置20を、閃光定着器
２と併せて示す。FIG. 6 shows a conventional sheet paper conveying device 20 together with the flash fixing device 2.
21,22,23は夫々第1,第2,第３のシート紙搬送ローラ組
立体であり、シート紙搬送方向に、下流側より並設して
ある。Reference numerals 21, 22, and 23 denote first, second, and third sheet paper transport roller assemblies, respectively, which are juxtaposed from the downstream side in the sheet paper transport direction.
各シート紙搬送ローラ組立体21,22,23は、夫々中空の
固定中心軸21-1,22-1,23-1に、ローラ21-2,22-2,23-2が
回転可能に嵌合された構造である。Rollers 21-2, 22-2, 23-2 are rotatably fitted on hollow fixed central shafts 21-1, 22-1, 23-1, respectively. It is a combined structure.
各ローラ22-2,23-2,23-2には、全周に亘って複数の孔
21-2a,22-2a,23-2aが形成してある。Each roller 22-2, 23-2, 23-2 has a plurality of holes over the entire circumference.
21-2a, 22-2a and 23-2a are formed.
また、中空固定中心軸21-1,22-1,23-1には、一の開口
21-1a,22-1a,23-1aが形成してある。The hollow fixed central shafts 21-1, 22-1, 23-1 have one opening.
21-1a, 22-1a and 23-1a are formed.
各中空固定軸21-1,22-1,23-1は負圧源24と接続してあ
る。Each hollow fixed shaft 21-1, 22-1, 23-1 is connected to a negative pressure source 24.
ローラ21-2,22-2,23-2は矢印Ｄで示すように反時計方
向に回転され、複数の孔21-2a,22-2a,23-2aのうち開口2
1-1a,22-1a,23-1aと順次対向する孔が吸引作用をしてシ
ート紙を吸着すると共にローラ21-2〜23-2の回転力によ
り矢印Ｃ方向に搬送力を付与する。The rollers 21-2, 22-2, and 23-2 are rotated in the counterclockwise direction as shown by the arrow D, and the openings 21-2a, 22-2a, and 23-2a are opened.
The holes sequentially facing 1-1a, 22-1a, and 23-1a perform a suction action to suck the sheet paper, and impart a conveying force in the direction of arrow C by the rotational force of the rollers 21-2 to 23-2.
シート紙１は、各シート紙搬送ローラ組立体21,22,23
の部位で吸着されつつ搬送される。The sheet paper 1 is supplied to each of the sheet conveying roller assemblies 21, 22, and 23.
Is transported while being sucked at the site.
ここで、開口21-1a,22-1a,23-1aは、ローラ組立体21,
22,23の中心を通り、シート紙搬送面12に対して垂直な
面25,26,27に対して、シート紙搬送方向とは逆方向に角
度α（＝10°）偏倚した部位に形成してある。搬送され
てきたシート紙を出来るだけ早く吸着するためである。Here, the openings 21-1a, 22-1a, and 23-1a are the roller assemblies 21,
The sheet is formed at a position deviated by an angle α (= 10 °) in a direction opposite to the sheet conveying direction with respect to the planes 25, 26, and 27 passing through the centers of 22, 23 and perpendicular to the sheet conveying plane 12. It is. This is for adsorbing the conveyed sheet paper as soon as possible.
第７図に拡大して示すように、複数の孔23-2aの各孔
は、ローラ組立体23の頂部に到る手前側の位置より頂部
に到る間に吸引作用を行い、シート紙１は矢印で示すよ
うにシート紙搬送面12に対して角度α斜上方を向く搬送
力F1を付与される。As shown in an enlarged manner in FIG. 7, each of the plurality of holes 23-2a performs a suction action while reaching the top from a position on the near side reaching the top of the roller assembly 23. It is imparted a conveying force F 1 directed to the angle α obliquely upward with respect to the sheet feed conveying surface 12 as indicated by an arrow.
このため、第６図に示すように、シート紙１がシート
紙搬送面12から浮き上がり、この先端が定着器２の下面
の段部14に引っ掛かってジャムを起こすことがある。For this reason, as shown in FIG. 6, the sheet paper 1 may be lifted from the sheet paper conveying surface 12 and its leading edge may be caught by the step 14 on the lower surface of the fixing device 2 to cause a jam.
また、シート紙１が第８図に示すように上面が凹とな
るようにカールしていることがある。29はカールした部
分である。また、定着の過程で、シート紙１は上面を加
熱され、上面側を乾燥されて、上面が凹となるようにカ
ールする傾向がある。Further, the sheet paper 1 may be curled such that the upper surface is concave as shown in FIG. 29 is a curled part. Further, during the fixing process, the sheet paper 1 tends to curl so that the upper surface is heated and the upper surface side is dried, and the upper surface becomes concave.
このようにカールしたシート紙１においては、上記の
ジャムは更に発生し易くなる。In the sheet paper 1 curled in this way, the above-mentioned jam is more likely to occur.
本発明はジャムの発生を防止可能としたシート紙搬送
装置を提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a sheet paper conveying device capable of preventing occurrence of jam.
第１図は本発明のシート紙搬送装置30の排出側のシー
ト紙搬送ローラ組立体の原理構成を示す。FIG. 1 shows the principle configuration of a sheet-sheet conveying roller assembly on the discharge side of the sheet-sheet conveying device 30 of the present invention.
31はローラであり、全周に亘って複数の孔32を有し、
中空固定中心軸33に回転可能に設けてあり、シート紙１
と接触する部分34が矢印Ｃで示すシート紙搬送方向に移
動するように矢印Ｇ方向に回転される。31 is a roller, having a plurality of holes 32 over the entire circumference,
Rotatably mounted on the hollow fixed center shaft 33, the sheet paper 1
Is rotated in the direction of arrow G so that the portion 34 in contact with the sheet moves in the sheet paper conveyance direction indicated by arrow C.
35は負圧源であり、中空固定中心軸33と連通して設け
てある。Reference numeral 35 denotes a negative pressure source, which is provided in communication with the hollow fixed central shaft 33.
36は開口であり、中空固定中心軸33の周面のうち、中
空固定中心軸33の中心37を通りシート紙搬送面12と垂直
をなす面38に対して、シート紙搬送方向Ｃ（ローラ31の
回転方向Ｇ）に所定角度β偏倚して形成してある。Reference numeral 36 denotes an opening, of which a surface 38 passing through the center 37 of the hollow fixed central shaft 33 and perpendicular to the sheet paper transporting surface 12 of the peripheral surface of the hollow fixed central shaft 33 has a sheet paper transporting direction C (roller 31). In the rotation direction G).
各孔32は、開口36と対向する回転区間内で、負圧源35
により、中空固定中心軸33,開口36を介してシート紙１
を吸着し、同時にローラ31の回転により矢印F2で示す搬
送力を付与する。Each hole 32 is provided with a negative pressure source 35 in a rotation section facing the opening 36.
The sheet paper 1 through the hollow fixed central shaft 33 and the opening 36
Adsorbs, imparting a conveying force indicated by the arrow F 2 by simultaneously rotating the roller 31.
ここで、開口36は面38に対してシート紙搬送方向Ｃに
角度β偏倚しているため、シート紙１への搬送力は、シ
ート搬送面12に対して斜め下方向に角度β傾斜した方向
に付与される。Here, since the opening 36 is deviated by an angle β with respect to the surface 38 in the sheet paper conveyance direction C, the conveyance force to the sheet paper 1 is inclined obliquely downward by an angle β with respect to the sheet conveyance surface 12. Is given to
このため、第８図に示すように、シート紙１の搬送方
向上先端1a側が上方にカールしている場合でも、シート
紙１がローラ31により送り出されたときに、先端1a側の
高さはシート紙搬送面12より下方に保たれ、シート紙搬
送面12より上方への浮き上りは起きない。For this reason, as shown in FIG. 8, even when the upper end 1a side of the sheet paper 1 in the transport direction is curled upward, when the sheet paper 1 is sent out by the roller 31, the height of the front end 1a side is increased. It is kept below the sheet paper transport surface 12 and does not rise above the sheet paper transport surface 12.
従って、シート紙１の先端1aが定着器２の下面の段部
14に引っ掛かることが無く、然してジャムが起きない。Accordingly, the leading edge 1a of the sheet paper 1 is
It doesn't get caught on the 14 and no jam occurs.
第２図及び第３図は夫々本発明のシート紙搬送装置50
の一実施例を示す。FIGS. 2 and 3 show a sheet conveying apparatus 50 according to the present invention, respectively.
An example will be described.
51は第１のシート紙搬送ローラ組立体、52は第２のシ
ート紙搬送ローラ組立体、53は第３のシート紙搬送ロー
ラ組立体であり、シート紙搬送方向に等間隔で並んで配
されている。Reference numeral 51 denotes a first sheet paper conveyance roller assembly, 52 denotes a second sheet paper conveyance roller assembly, and 53 denotes a third sheet paper conveyance roller assembly, which are arranged at regular intervals in the sheet paper conveyance direction. ing.
各シート紙ローラ組立体51,52,53は、中空固定中心軸
51-1,52-1,53-1に、ローラ51-2,52-2,53-2が回転可能に
嵌合して設けられた構造であり、各ローラ51-2,52-2,53
-2はベルト駆動されて共に反時計方向に回転される。Each sheet roller assembly 51, 52, 53 has a hollow fixed central shaft.
The rollers 51-2, 52-2, and 53-2 are rotatably fitted to 51-1, 52-1, 53-1. 53
-2 is driven belt and rotated together in the counterclockwise direction.
各ローラ51-2,52-2,53-2には、全周に亘って複数の孔
51-2a,52-2a,53-2aが形成してある。Each roller 51-2, 52-2, 53-2 has multiple holes over the entire circumference.
51-2a, 52-2a and 53-2a are formed.
各中空固定中心軸51-1,52-1,53-1には、開口51-1a,52
-1a,53-1aが形成してある。Each hollow fixed central shaft 51-1, 52-1, 53-1 has an opening 51-1a, 52
-1a and 53-1a are formed.
開口51-1aは、中空固定中心軸51-1の中心51-1bを通り
シート紙搬送面12に対して垂直な面54に対して時計方向
に角度θ（10度）偏倚して形成してある。The opening 51-1a is formed so as to be deviated clockwise by an angle θ (10 degrees) with respect to a plane 54 passing through the center 51-1b of the hollow fixed central axis 51-1 and perpendicular to the sheet paper conveying surface 12. is there.
開口52-1a,53-1aは、上記の開口51-1aとは逆に、中空
固定中心軸52-1,53-1の中心52-1b,53-1bを通りシート紙
搬送面12に対して垂直な面55,56に対して反時計方向に
角度θ偏倚して形成してある。The openings 52-1a and 53-1a are opposite to the openings 51-1a and pass through the centers 52-1b and 53-1b of the hollow fixed center shafts 52-1 and 53-1 with respect to the sheet paper transport surface 12. And is deviated counterclockwise by an angle θ with respect to the vertical surfaces 55 and 56.
各中空固定中心軸51-1,52-1,53-1は、負圧源（ブロ
ワ）57に共通に接続してある。The respective hollow fixed central shafts 51-1, 52-1, 53-1 are commonly connected to a negative pressure source (blower) 57.
シート紙１は、各シート紙ローラ組立体51,52,53によ
り順次吸着されて、ガイド58により支持案内されつつ矢
印Ｃ方向に搬送される。ガイド58の上面が前記のシート
紙搬送面12である。The sheet paper 1 is sequentially sucked by the respective sheet paper roller assemblies 51, 52, and 53, and is conveyed in the direction of arrow C while being supported and guided by the guide 58. The upper surface of the guide 58 is the above-described sheet paper transport surface 12.
各シート紙搬送ローラ組立体51,52,53,シート紙１に
付与する搬送力は夫々矢印F3,F4,F5で示す如くになる。Each sheet of paper conveying roller assembly 51, 52, 53, conveying force applied to the sheet paper 1 becomes as shown by respective arrows F 3, F 4, F 5 .
即ち、シート紙搬送装置50の入口部にある第１のシー
ト紙搬送ローラ組立体51が付与する搬送力F3は、シート
紙搬送面12に対して斜上方に角度θ傾斜した方向であ
る。That is, the conveying force F 3 applied by the first sheet paper conveying roller assembly 51 at the entrance of the sheet paper conveying device 50 is in a direction inclined obliquely upward by an angle θ with respect to the sheet paper conveying surface 12.
シート紙のジャムが発生し易い、シート紙搬送装置50
の略中央部及び出口側にある第2,第３のシート紙搬送ロ
ーラ組立体52,53が付与する搬送力F4,F5は、シート紙搬
送面12に対して斜下方に角度θ傾斜した方向となる。Sheet paper transport device 50 where sheet paper jams easily occur
The conveying forces F 4 and F 5 applied by the second and third sheet-sheet conveying roller assemblies 52 and 53 at the substantially central portion and the exit side of the sheet are inclined at an angle θ inclined obliquely downward with respect to the sheet-sheet conveying surface 12. Direction.
このため、シート紙１はシート搬送面12より浮き上が
ることなく搬送され、シート紙１の先端が上方にカール
している場合にも、定着器１の下面の段部14に引っ掛か
ってジャムを起こすことなく搬送される。Therefore, the sheet paper 1 is conveyed without being lifted from the sheet conveying surface 12, and even when the leading end of the sheet paper 1 is curled upward, the sheet paper 1 may be jammed by being caught on the step portion 14 on the lower surface of the fixing device 1. Transported without.
第４図は本発明の別の実施例になるシート紙搬送装置
60を示す。同図中、第２図に示す構成部分と対応する部
分には同一符号を付す。FIG. 4 is a sheet paper conveying apparatus according to another embodiment of the present invention.
Indicates 60. In the figure, portions corresponding to the components shown in FIG. 2 are denoted by the same reference numerals.
第1,第2,第３のシート紙搬送ローラ組立体51A,52A,53
Aは、中空固定中心軸51A-1,52A-1,53A-1を、面54,55,56
に対して、反時計方向と時計方向との両方向に角度γ偏
倚した部位に二つの開口51A-10,51A-11,52A-10,52A-11,
53A-10,53A-11を設けた構成である。First, second, and third sheet paper transport roller assemblies 51A, 52A, 53
A is a hollow fixed central shaft 51A-1, 52A-1, 53A-1, the surface 54, 55, 56
On the other hand, two openings 51A-10, 51A-11, 52A-10, 52A-11, are provided at a position offset by an angle γ in both the counterclockwise direction and the clockwise direction.
53A-10 and 53A-11 are provided.
各シート紙搬送ローラ組立体51A,52A,53Aは、時計方
向に偏倚している開口51A-11,52A-11,53A-11により、シ
ート紙を早期に吸着し、反時計方向に偏倚している開口
51A-10,52A-10,53A-10によりシート紙搬送台12に対して
斜め下方に搬送力を付与する。The sheet paper transport roller assemblies 51A, 52A, 53A adsorb the sheet paper at an early stage by the openings 51A-11, 52A-11, 53A-11 which are biased clockwise, and are biased counterclockwise. Opening
51A-10, 52A-10 and 53A-10 apply a conveying force obliquely downward to the sheet conveying table 12.
本実施例によっても、シート紙はシート紙搬送面12か
ら浮き上がることなく搬送されて、ジャムを生ずる虞れ
なく搬送される。Also according to the present embodiment, the sheet paper is conveyed without being lifted from the sheet paper conveyance surface 12, and is conveyed without a risk of causing a jam.
また、本発明は、定着器がヒートロール式のものの場
合に適用しても同様の効果を生ずる。Further, the present invention produces the same effect when applied to a case where the fixing device is of a heat roll type.
以上説明した様に、本発明によれば、シート紙処理部
の入口側の位置に配されたシート紙搬送ローラ組立体に
よって、搬送されてきたシート紙を出来るだけ早くに吸
着することが出来、且つ、シート紙処理部の排出側の位
置に配されたシート紙搬送ローラ組立体によって、シー
ト紙搬送力が、シート紙搬送面に対して斜め下方向の向
きに付与され、このため、シート紙に上方へのカールが
ある場合であっても、シート紙の搬送方向先端側のシー
ト紙搬送面からの浮き上がりを防止し得、これにより定
着器へ引っ掛かってジャムすることを防止し得、シート
紙の搬送の確実性を向上し得る。As described above, according to the present invention, the conveyed sheet paper can be adsorbed as soon as possible by the sheet paper conveyance roller assembly disposed at the position on the entrance side of the sheet paper processing unit, Further, the sheet paper transporting roller assembly disposed at the position on the discharge side of the sheet paper processing unit applies the sheet paper transporting force in a diagonally downward direction with respect to the sheet paper transporting surface. Even if there is an upward curl in the sheet paper, the sheet paper can be prevented from rising from the sheet paper transport surface at the leading end side in the transport direction, and thereby can be prevented from being jammed by being caught by the fixing device. Can be more reliably transported.
第１図は本発明のシート紙搬送装置の排出側の位置に配
されたシート紙搬送ローラ組立体の動作を説明する図、 第２図は本発明の一実施例になるシート紙搬送装置の特
徴を示す第３図中II-II線に沿う断面図、 第３図は本発明の一実施例になるシート紙搬送装置の一
部切截平面図、 第４図は本発明の別の実施例を示す図、 第５図は本発明が適用される像形成装置を示す図、 第６図は従来例を示す図、 第７図は第６図中一のローラ組立体によるシート紙搬送
を説明する図、 第８図はシートのカールを示す図である。 図において、１はシート紙、２は閃光定着器、３は像形
成装置、12はシート紙搬送面、30,50,60はシート紙搬送
装置、51,52,53,51A,52A,53Aはシート紙搬送ローラ組立
体、31,52-1,52-2,53-2はローラ、32,51-2a,52-2a,53-2
aは孔、33,51-1,52-1,53-1,51A-1,52A-1,53A-1は中空固
定中心軸、35,57は負圧源、36,51-1a,52-1a,53-1a,51A-
10,52A-10,53A-10は開口、37,51-1b,52-1b,53-1bは中
心、38,54,55,56は面、58はガイド を示す。FIG. 1 is a view for explaining the operation of a sheet paper transport roller assembly arranged at a position on the discharge side of the sheet paper transport apparatus of the present invention, and FIG. 2 is a view of the sheet paper transport apparatus according to one embodiment of the present invention. 3 is a sectional view taken along the line II-II in FIG. 3, FIG. 3 is a partially cutaway plan view of a sheet paper conveying device according to an embodiment of the present invention, and FIG. 4 is another embodiment of the present invention. FIG. 5 is a view showing an example, FIG. 5 is a view showing an image forming apparatus to which the present invention is applied, FIG. 6 is a view showing a conventional example, and FIG. FIG. 8 is a diagram illustrating curling of a sheet. In the figure, 1 is a sheet paper, 2 is a flash fixing device, 3 is an image forming apparatus, 12 is a sheet paper conveying surface, 30, 50, and 60 are sheet paper conveying apparatuses, and 51, 52, 53, 51A, 52A, and 53A are Sheet paper transport roller assembly, 31, 52-1, 52-2, 53-2 are rollers, 32, 51-2a, 52-2a, 53-2
a is a hole, 33,51-1,52-1,53-1,51A-1,52A-1,53A-1 is a hollow fixed center shaft, 35,57 is a negative pressure source, 36,51-1a, 52 -1a, 53-1a, 51A-
10, 52A-10, 53A-10 are openings, 37, 51-1b, 52-1b, 53-1b are centers, 38, 54, 55, 56 are planes, and 58 is a guide.
Claims (1)
れ、シート紙処理部の処理区間をシート紙を吸着して搬
送するシート紙搬送装置であって、 周囲に複数の孔を有し、シート紙を搬送する方向に回転
されるローラと、中空であり、中空の部分が負圧源と連
通してあり、該ローラを回転可能に支持し、シート紙が
搬送されるシート紙搬送面側に開口を有する中空固定中
心軸とよりなり、ローラが回転することにより、ローラ
の周囲の孔が順次上記開口と連通し、該連通した孔が吸
引作用を行い、上記シートを吸着して搬送するシート紙
搬送ローラ組立体が、シート紙の搬送方向上、シート紙
処理部の入口側の位置と排出側の位置とに配され、 シート紙処理部の入口側の位置に配されたシート紙搬送
ローラ組立体は、上記中空固定中心軸の開口を、該中空
固定中心軸の中心を通り上記シート紙搬送面に垂直な面
に対してシート紙搬送方向とは逆の方向に偏倚して設
け、 シート紙処理部の排出側の位置に配されたシート紙搬送
ローラ組立体は、上記中空固定中心軸の開口を、該中空
固定中心軸の中心を通り上記シート紙搬送面に垂直な面
に対してシート紙搬送方向に偏倚して設けたことを特徴
とするシート紙搬送装置。1. A sheet paper conveying device provided at a position facing a sheet paper processing section, for adsorbing and conveying a sheet paper in a processing section of the sheet paper processing section, the apparatus having a plurality of holes around the sheet paper conveying apparatus. A roller that is rotated in the direction in which the sheet paper is transported, and a hollow portion, the hollow portion being in communication with a negative pressure source, rotatably supporting the roller, and a sheet paper transport surface side on which the sheet paper is transported. When the roller rotates, the holes around the roller sequentially communicate with the opening, and the communicated holes perform a suction action to attract and convey the sheet. The sheet paper transport roller assembly is disposed at a position on the entrance side of the sheet paper processing unit and a position on the discharge side in the sheet paper transport direction, and is disposed at a position on the entrance side of the sheet paper processing unit. The roller assembly opens the hollow fixed center shaft. Is provided in a direction opposite to the sheet paper transport direction with respect to a plane passing through the center of the hollow fixed central axis and perpendicular to the sheet paper transport surface, and is disposed at a position on the discharge side of the sheet paper processing unit. In the sheet paper transport roller assembly, the opening of the hollow fixed central axis is provided so as to be deviated in the sheet paper transport direction with respect to a plane passing through the center of the hollow fixed central axis and perpendicular to the sheet paper transport plane. A sheet paper conveying device characterized by the above-mentioned.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010397A JP2799023B2 (en) | 1990-01-18 | 1990-01-18 | Sheet paper transport device |
| US07/637,772 US5186451A (en) | 1990-01-18 | 1991-01-07 | Sheet paper feed apparatus having vacuum feed rollers |
| DE69104234T DE69104234T2 (en) | 1990-01-18 | 1991-01-08 | Sheet feeder. |
| EP91300112A EP0438219B1 (en) | 1990-01-18 | 1991-01-08 | Sheet paper feed apparatus |
| DE69125504T DE69125504T2 (en) | 1990-01-18 | 1991-01-08 | Sheet feeder |
| EP94100685A EP0600849B1 (en) | 1990-01-18 | 1991-01-08 | Sheet paper feed apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010397A JP2799023B2 (en) | 1990-01-18 | 1990-01-18 | Sheet paper transport device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03216453A JPH03216453A (en) | 1991-09-24 |
| JP2799023B2 true JP2799023B2 (en) | 1998-09-17 |
Family
ID=11749002
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2010397A Expired - Fee Related JP2799023B2 (en) | 1990-01-18 | 1990-01-18 | Sheet paper transport device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2799023B2 (en) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1549203A (en) * | 1975-07-23 | 1979-08-01 | Vits Maschinenbau Gmbh | Device for overlapping sheets which are regularly individually conveyed one after the other |
| JPS63175657U (en) * | 1986-11-13 | 1988-11-15 | ||
| JPS63100454U (en) * | 1986-12-19 | 1988-06-29 |
-
1990
- 1990-01-18 JP JP2010397A patent/JP2799023B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03216453A (en) | 1991-09-24 |
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| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |