JPH1025048A - Paper sheet conveyance device - Google Patents

Paper sheet conveyance device

Info

Publication number
JPH1025048A
JPH1025048A JP8180309A JP18030996A JPH1025048A JP H1025048 A JPH1025048 A JP H1025048A JP 8180309 A JP8180309 A JP 8180309A JP 18030996 A JP18030996 A JP 18030996A JP H1025048 A JPH1025048 A JP H1025048A
Authority
JP
Japan
Prior art keywords
roller
reverse
transport
rotating
reverse rotation
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.)
Pending
Application number
JP8180309A
Other languages
Japanese (ja)
Inventor
Eiji Nakajima
栄次 中嶋
Hisafumi Miyake
尚史 三宅
Tadahiro Kugimaru
忠大 釘丸
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kyocera Mita Industrial Co Ltd
Original Assignee
Mita Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mita Industrial Co Ltd filed Critical Mita Industrial Co Ltd
Priority to JP8180309A priority Critical patent/JPH1025048A/en
Publication of JPH1025048A publication Critical patent/JPH1025048A/en
Pending legal-status Critical Current

Links

Landscapes

  • Handling Of Cut Paper (AREA)
  • Paper Feeding For Electrophotography (AREA)
  • Delivering By Means Of Belts And Rollers (AREA)
  • Separation, Sorting, Adjustment, Or Bending Of Sheets To Be Conveyed (AREA)

Abstract

PROBLEM TO BE SOLVED: To perform reversal and conveyance of a paper sheet without generating paper jam by changing over transmission means of two systems, a same direction rotation transmission means and a reverse direction rotation transmission means, so as to always rotate a conveyance roller in the conveyance direction at rotating a normal/reverse rotation roller. SOLUTION: A paper sheet sent from a paper feed passage 11 is guided with a guide plate 9 so as to be conveyed as shown by the arrow mark X1, pinched between a normal/reverse rotation roller 2 rotating clockwise and an auxiliary roller 2b, and fed to a reversal passage 12. When the paper sheet is perfectly drawn in the reversal passage 12, the normal/reverse rotation roller 2 is rotated anticlockwise, and the paper sheet is conveyed in the direction of a discharge passage 13 as shown by the arrow mark X2. The paper sheet sent from the roller 2 is drawn in the discharge passage 13 by means of a conveyance roller 5 and an auxiliary roller 5b. The roller 2 is rotated again clockwise, the succeeding paper sheet is conveyed from the paper feed passage 11 to the reversal passage 12, and the precedingly drawn paper sheet is conveyed in the direction of the arrow mark X3.

Description

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

【0001】[0001]

【発明の属する技術分野】本発明は,複写機,プリンタ
等において,用紙をスイッチバックさせて搬送する用紙
搬送装置に係り,詳しくは,一方向に回転することによ
って用紙を給紙通路から反転通路方向へ搬送し,逆方向
に回転することによって上記用紙を反転通路から搬送通
路方向へ搬送する正・逆回転ローラと,該正・逆回転ロ
ーラによって搬送通路方向へ搬送された用紙を搬送通路
に沿って搬送する搬送ローラとを用いて用紙をスイッチ
バック反転させて排出トレイ方向へ搬送する用紙搬送装
置に関するものである。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet conveying apparatus for conveying a sheet by switching back the sheet in a copying machine, a printer, and the like. Forward / reverse rotation rollers for transporting the paper from the reversing path toward the transport path by transporting the paper in the reverse direction and rotating the paper in the reverse direction, and feeding the paper transported in the transport path direction by the forward / reverse rollers to the transport path. The present invention relates to a sheet conveying apparatus that switches back a sheet using a conveying roller that conveys the sheet in a reverse direction and conveys the sheet toward a discharge tray.

【0002】[0002]

【従来の技術】複写機,プリンタ等における両面複写装
置等では,通常,用紙をスイッチバックさせることによ
って表裏を反転させるスイッチバック反転機構が用いら
れている。上記スイッチバック反転機構は,通常,正・
逆回転ローラを一方向に回転させることによって用紙を
給紙通路から反転通路方向へ搬送し,続いて逆方向に回
転させることによって上記用紙を反転通路から搬送通路
方向へ搬送し,更に上記搬送通路に設けられた搬送ロー
ラによって上記用紙を搬送通路に沿って搬送するように
動作する。その際,従来は,正・逆回転ローラを搬送ロ
ーラの回転方向の違いから,上記正・逆回転ローラの駆
動は専用の正・逆回転モータにより行われ,一方向回転
しか行わない上記搬送ローラは,専用モータ,或いは別
駆動源から駆動力を取ることによって駆動されていた。
しかし,この装置では,駆動源を2つ設けねばならず,
コスト高となり,且つスペースが大きくなるという問題
があった。そこで,上記搬送ローラの駆動を,正・逆回
転ローラ用の正・逆回転モータの駆動力を用いて行う両
面複写装置が,実開平1−152950に提案されてい
る。
2. Description of the Related Art A double-sided copying machine in a copying machine, a printer, or the like usually uses a switchback reversing mechanism for reversing a sheet by switching back the sheet. The above switchback reversal mechanism is usually
By rotating the reverse rotation roller in one direction, the sheet is conveyed from the sheet feeding path to the reversing path, and then by rotating in the reverse direction, the sheet is conveyed from the reversing path to the conveying path. The sheet is transported along a transport path by a transport roller provided in the printer. Conventionally, the forward / reverse rotation roller is driven by a dedicated forward / reverse rotation motor due to the difference in the rotation direction of the transport roller, and the transport roller is driven only in one direction. Has been driven by taking a driving force from a dedicated motor or another driving source.
However, in this device, two driving sources must be provided,
There has been a problem that the cost is high and the space is large. In view of this, a double-sided copying apparatus in which the above-mentioned transport roller is driven using the driving force of a forward / reverse rotation motor for forward / reverse rotation rollers has been proposed in Japanese Utility Model Laid-Open No. 1-152950.

【0003】上記実開平1−152950に提案されて
いる両面複写装置の概略構成を図4に示す。両面複写装
置の搬送装置30には,正・逆回転ローラ31,搬送ロ
ーラ32,32及びそれらを駆動する単一の駆動モータ
33が設置されている。上記正・逆回転ローラ31及び
搬送ローラ32には,それぞれ駆動ギア33a,従動ギ
ア31a,32a,及びタイミングベルト34,35を
介して駆動モータ33の駆動力が伝達される。また,上
記従動ギア32aには,駆動ギア33aの時計方向の回
転のみ伝達する一方向回転クラッチ36が設置されてい
る。従って,上記搬送ローラ32は,上記駆動モータ3
3が時計方向に回転している間だけ,即ち,上記正・逆
回転ローラ31が反時計方向に回転している間だけ,反
時計方向に回転する。以上のような構成を持つ両面複写
装置の搬送装置30による用紙反転動作(スイッチバッ
ク)を簡単に説明する。 搬送装置30では,まず用紙
Yが給紙通路38から矢印方向に送られてくる。続い
て,切り換え爪37を支点37aを中心に反時計方向に
回動させることによって通路39が開かれ,正・逆回転
ローラ31が時計方向に回転することによって,用紙Y
は反転通路40内へ引き込まれる。この時,上述した一
方向回転クラッチ36が断状態にあり,駆動モータ33
の駆動力は搬送ローラ32には伝達されず,上記搬送ロ
ーラ32は停止状態である。
FIG. 4 shows a schematic configuration of a two-sided copying apparatus proposed in Japanese Utility Model Laid-Open No. 1-152950. The transport device 30 of the duplex copying machine is provided with a forward / reverse rotating roller 31, transport rollers 32, 32, and a single drive motor 33 for driving them. The driving force of the drive motor 33 is transmitted to the forward / reverse rotation roller 31 and the transport roller 32 via a drive gear 33a, driven gears 31a and 32a, and timing belts 34 and 35, respectively. The driven gear 32a is provided with a one-way rotation clutch 36 that transmits only the clockwise rotation of the drive gear 33a. Therefore, the transport roller 32 is driven by the drive motor 3
3 rotates counterclockwise only while rotating clockwise, that is, while the forward / reverse rotation roller 31 rotates counterclockwise. The sheet reversing operation (switchback) by the transport device 30 of the duplex copying apparatus having the above configuration will be briefly described. In the transport device 30, first, the paper Y is sent from the paper feed path 38 in the direction of the arrow. Subsequently, the passage 39 is opened by rotating the switching claw 37 counterclockwise about the fulcrum 37a, and the paper Y is rotated by the forward / reverse rotation roller 31 rotating clockwise.
Is drawn into the reversing passage 40. At this time, the one-way rotation clutch 36 is in the disengaged state and the drive motor 33
Is not transmitted to the transport roller 32, and the transport roller 32 is stopped.

【0004】用紙Yが上記反転通路40内へ完全に引き
込まれると,続いて上記正・逆回転ローラ31は反時計
方向に回転し,同時に上記切り換え爪37が時計方向に
回動して通路41が開かれ,用紙Yは通路41を介して
搬送通路42方向へ送られる。この時,上述した一方向
回転クラッチ36が結合状態にあり,搬送ローラ32は
反時計方向に回転しており,上記正・逆回転ローラ31
によって搬送通路42方向へ送られてきた用紙Yは,上
記搬送ローラ32によって搬送通路42に引き込まれ
る。用紙Yが上記搬送通路42へ完全に引き込まれた段
階で,上記正・逆回転ローラ31は再び時計方向に回転
することによって新しい用紙Yを反転通路40内へ引き
込む動作を開始する。この時,上記正・逆回転ローラ3
1が用紙Yの引き込みを行っている間上記搬送ローラ3
2は停止しているため,先に搬送通路42に搬送されて
いる用紙Yは,次の用紙Yの上記搬送通路42方向への
搬送動作が始まるまで搬送通路42の位置で停止してい
ることになる。以上説明したように,上記搬送装置30
では,正・逆回転ローラ用の正・逆回転モータのみを用
いて正・逆回転ローラ及び搬送ローラを駆動し,用紙反
転動作(スイッチバック)を行っていた。
When the sheet Y is completely drawn into the reversing passage 40, the forward / reverse rotation roller 31 subsequently rotates counterclockwise, and at the same time, the switching claw 37 rotates clockwise to pass the passage 41. Is opened, and the sheet Y is sent through the path 41 toward the transport path 42. At this time, the one-way rotation clutch 36 is in the engaged state, the transport roller 32 is rotating in the counterclockwise direction, and the forward / reverse rotation roller 31 is rotating.
The sheet Y sent in the direction of the transport passage 42 is drawn into the transport passage 42 by the transport roller 32. At the stage when the sheet Y is completely drawn into the transport path 42, the forward / reverse rotation roller 31 starts to rotate the clockwise direction again to draw new sheet Y into the reversing path 40. At this time, the forward / reverse rotating roller 3
While the sheet 1 is drawing in the sheet Y, the transport rollers 3
2 is stopped, the sheet Y previously conveyed to the conveyance path 42 must be stopped at the position of the conveyance path 42 until the operation of conveying the next sheet Y in the direction of the conveyance path 42 starts. become. As described above, the transfer device 30
In the above, the forward / reverse rotation roller and the transport roller are driven using only the forward / reverse rotation motor for the forward / reverse rotation roller to perform the sheet reversing operation (switchback).

【0005】[0005]

【発明が解決しようとする課題】しかしながら,従来の
ように搬送ローラの駆動に専用モータを用いる場合に
は,前記したように,専用モータを設置することによる
コスト増,及び設置スペース確保等の問題点がある。ま
た,上記正・逆回転ローラ用モータ以外の別駆動源から
駆動をとることについても,駆動力伝達のためのスペー
スを確保することが困難な場合が多い。更に,上記実開
平1−152950に提案されている両面装置では,上
記搬送ローラは上記正・逆回転ローラが時計方向に回転
している時にのみ駆動され,上記正・逆回転ローラが反
時計方向に回転している時は停止してしまうため,用紙
が上記搬送通路42内で紙詰まりを生じる危険性が大き
いという問題点があった。本発明は,上記事情に鑑みて
なされたものであり,その目的とするところは,正・逆
回転ローラ用モータのみの駆動力によって正・逆回転ロ
ーラ及び搬送ローラを駆動し,上記正・逆回転ローラ回
転時に常に上記搬送ローラを搬送方向に回転させること
によって用紙を紙詰まりなく反転,搬送することが可能
な用紙搬送装置を提供することである。
However, when a dedicated motor is used to drive the transport rollers as in the prior art, as described above, there are problems such as an increase in cost due to the installation of the dedicated motor, and an increase in installation space. There is a point. In addition, it is often difficult to secure a space for transmitting a driving force in driving from a different driving source other than the motor for the forward / reverse rotation roller. Further, in the double-sided device proposed in Japanese Utility Model Application Laid-Open No. 1-152950, the transport roller is driven only when the forward / reverse rotating roller is rotating clockwise, and the forward / reverse rotating roller is rotated counterclockwise. When the paper is being rotated, the paper is liable to be jammed in the conveyance path 42 because of the stoppage. The present invention has been made in view of the above circumstances, and an object of the present invention is to drive the forward / reverse rotation roller and the transport roller by the driving force of only the forward / reverse rotation roller motor, and to perform the forward / reverse rotation. It is an object of the present invention to provide a sheet conveying apparatus capable of inverting and conveying a sheet without paper jam by always rotating the conveying roller in the conveying direction when the rotation roller rotates.

【0006】[0006]

【課題を解決するための手段】上記目的を達成するため
に本発明は,一方向に回転することによって用紙を給紙
通路から反転通路方向へ搬送し,逆方向に回転すること
によって上記用紙を反転通路から搬送通路方向へ搬送す
る正・逆回転ローラと,該正・逆回転ローラによって搬
送通路方向へ搬送された用紙を搬送通路に沿って搬送す
る搬送ローラと,上記正・逆回転ローラを駆動する駆動
手段とを具備する用紙搬送装置において,上記正・逆回
転ローラと上記搬送ローラとの間に設けられ,上記正・
逆回転ローラと上記搬送ローラとを同方向に回転させる
同方向回転伝達手段と,上記正・逆回転ローラと上記搬
送ローラとの間に設けられ,上記正・逆回転ローラと上
記搬送ローラとを逆方向に回転させる逆方向回転伝達手
段と,上記正・逆回転ローラの回転方向に応じて上記二
系統の伝達手段を切り換える切り換え手段とを具備し,
上記切り換え手段によって上記同方向回転伝達手段と逆
方向回転伝達手段による二系統の伝達手段を切り換える
ことによって上記正・逆回転ローラの回転時に常に上記
搬送ローラが搬送方向に回転するようにしたことを特徴
とする用紙搬送装置として構成されている。更に,上記
同方向回転伝達手段が,上記正・逆回転ローラと上記搬
送ローラ間を直列に連結する奇数個又は偶数個の第1の
ギヤ列によって構成し,上記逆方向回転伝達手段を,上
記正・逆回転ローラと上記搬送ローラ間を直列に連結す
る偶数個又は奇数個の第2のギヤ列によって構成し,上
記切り換え手段を,上記第1のギヤ列及び第2のギヤ列
に互いに異なる回転伝達方向をもつ一組の一方向回転ク
ラッチを設置することによって構成することができる。
SUMMARY OF THE INVENTION In order to achieve the above object, the present invention conveys a sheet from a paper feeding path to a reversing path by rotating in one direction and rotates the sheet by rotating in the opposite direction. A forward / reverse rotating roller for transporting the paper from the reversing path toward the transport path, a transport roller for transporting the paper transported by the forward / reverse rotating roller in the transport path along the transport path, and the forward / reverse rotating roller; A sheet conveying device having a driving unit for driving the sheet, provided between the forward / reverse rotating roller and the conveying roller,
A same-direction rotation transmitting means for rotating the reverse rotation roller and the conveyance roller in the same direction; and a rotation transmission means provided between the forward / reverse rotation roller and the conveyance roller. Reverse rotation transmitting means for rotating in the reverse direction, and switching means for switching between the two transmission means in accordance with the rotation direction of the forward and reverse rotation rollers;
By switching the two transmission means of the same direction rotation transmission means and the reverse direction rotation transmission means by the switching means, the transport roller always rotates in the transport direction when the forward and reverse rotation rollers rotate. It is configured as a characteristic paper transport device. Further, the same-direction rotation transmitting means comprises an odd-numbered or even-numbered first gear train connecting the forward / reverse rotating roller and the transport roller in series, and An even or odd number of second gear trains connecting the forward / reverse rotation roller and the transport roller in series are connected, and the switching means is different for the first gear train and the second gear train. It can be configured by installing a set of one-way rotating clutches having a rotation transmitting direction.

【0007】[0007]

【作用】本発明に係る用紙搬送装置では,正・逆回転ロ
ーラと搬送ローラとの間に,上記正・逆回転ローラと上
記搬送ローラとを同方向に回転させる同方向回転伝達手
段と,上記正・逆回転ローラと上記搬送ローラとを逆方
向に回転させる逆方向回転伝達手段の二系統の伝達手段
を具備し,切り換え手段を用いて上記正・逆回転ローラ
の回転方向に応じて上記二系統の伝達手段の切り換えを
行う。これによって,搬送ローラに専用駆動装置を設置
することなく,また,全く別の駆動源から駆動力を得る
ことなく,正・逆回転モータのみによって,正・逆回転
ローラ及び搬送ローラを駆動することができる。更に,
正・逆回転ローラ回転時には,その回転方向に関わらず
常に搬送ローラが一定の搬送方向に回転しているため,
紙詰まりなく用紙の反転,搬送を行うことができる。
In the paper transport apparatus according to the present invention, the same direction rotation transmitting means for rotating the forward / reverse rotating roller and the transport roller in the same direction between the forward / reverse rotating roller and the transport roller; And a reverse rotation transmission means for rotating the transport roller in the reverse direction and a forward / reverse rotation roller. The switching means is used to switch the rotation of the forward / reverse rotation roller in accordance with the rotation direction of the forward / reverse rotation roller. The transmission means of the system is switched. This allows the forward / reverse rotation roller and the transport roller to be driven only by the forward / reverse rotation motor without installing a dedicated drive device on the transport roller and without obtaining driving force from a completely different drive source. Can be. Furthermore,
When the forward and reverse rotation rollers rotate, the transport roller always rotates in a constant transport direction regardless of the rotation direction.
The paper can be reversed and transported without jamming.

【0008】[0008]

【発明の実施の形態】以下添付図面を参照して,本発明
の実施の形態及び実施例につき説明し,本発明の理解に
供する。尚,以下の実施の形態及び実施例は本発明を具
体化した一例であって,本発明の技術的範囲を限定する
性格のものではない。ここに,図1は本発明の実施の形
態に係る用紙搬送装置の概略構成を示す図,図2は第1
ギア列の構成を示す概念図,図3は各主要回転部の回転
伝達状況を示す図である。本実施の形態に係る用紙搬送
装置は,図1及び図2に示すごとく構成されている。ま
ず図1,図2を用いて,本実施の形態に係る用紙搬送装
置の主な構成と動作機構について説明する。本装置は,
主として,正・逆回転ローラ2とそれを駆動する駆動モ
ータ1,搬送ローラ5,及び上記正・逆回転ローラ2と
上記搬送ローラ5の間で駆動力を伝達する第1ギア列3
と第2ギア列4とで構成されている。上記駆動モータ1
の駆動力は,駆動軸1a,及びタイミングベルト15を
介して上記正・逆回転ローラ2の駆動ギア2aに伝達さ
れる。上記駆動モータ1は正・逆両回転方向に駆動可能
であり,それに応じて上記正・逆回転ローラ2も正・逆
両方向に回転する。上記正・逆回転ローラ2と上記搬送
ローラ5の間には,直列に配置したギア3a,3b,3
cの3つのギアにより構成される第1ギア列3と,直列
に配置したギア4a,4bの2つのギアにより構成され
る第2ギア列4の二系統の伝達経路が設置されている。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments and examples of the present invention will be described below with reference to the accompanying drawings to facilitate understanding of the present invention. The following embodiments and examples are mere examples embodying the present invention, and do not limit the technical scope of the present invention. Here, FIG. 1 is a diagram showing a schematic configuration of a sheet conveying device according to an embodiment of the present invention, and FIG.
FIG. 3 is a conceptual diagram showing the configuration of a gear train, and FIG. The paper transport device according to the present embodiment is configured as shown in FIGS. First, a main configuration and an operation mechanism of the sheet conveying apparatus according to the present embodiment will be described with reference to FIGS. This device is
Mainly, forward / reverse rotation roller 2 and drive motor 1 for driving the same, transport roller 5, and first gear train 3 for transmitting driving force between forward / reverse rotation roller 2 and transport roller 5
And a second gear train 4. Drive motor 1
Is transmitted to the drive gear 2a of the forward / reverse rotation roller 2 via the drive shaft 1a and the timing belt 15. The drive motor 1 can be driven in both forward and reverse rotation directions, and accordingly, the forward and reverse rotation roller 2 also rotates in both forward and reverse directions. Gears 3a, 3b, 3 arranged in series between the forward / reverse rotation roller 2 and the transport roller 5
Two transmission paths, a first gear train 3 composed of three gears c and a second gear train 4 composed of two gears 4a and 4b arranged in series, are provided.

【0009】図2に,上記第1ギア列3による上記正・
逆回転ローラ2と上記搬送ローラ5の接続状況を示す。
正・逆回転ローラ2に伝達された駆動モータ1からの駆
動力は,駆動ギア2a及び一方向回転クラッチ10を介
してギア3aに伝達される。上記一方向回転クラッチ1
0は,図1の方向に見て時計方向の回転のみを伝達し,
逆方向回転時は空転するようになっている。更に,上記
第1ギア列は,直列に配置したギア3a,3b,3cの
3つのギアにより構成されるため,上記正・逆回転ロー
ラ2と上記搬送ローラ5は同方向に回転する。従って上
記第1ギア列によって,上記正・逆回転ローラ2が時計
方向に回転する時のみ,上記搬送ローラ5は同じく時計
方向に回転する。上記第2ギア列も,基本的には上記図
2に示す第1ギア列と同様に構成される。上記第2ギア
列が上記第1ギア列と異なるのは,一方向回転クラッチ
10の回転伝達方向が逆であること,及びギア数が2つ
であることのみである。第2ギア列の場合,上記一方向
回転クラッチ10は,図1の方向に見て反時計方向の回
転のみを伝達し,逆方向回転時は空転するようになって
いる。更に,ギア数が4a,4bの2つであることか
ら,上記第2ギア列によって上記正・逆回転ローラ2と
上記搬送ローラ5は逆方向に回転する。従って上記第2
ギア列によって,上記正・逆回転ローラ2が反時計方向
に回転する時のみ,上記搬送ローラ5は逆に時計方向に
回転する。以上説明した第1ギア列,及び第2ギア列に
よって,各部の回転伝達状況を表にまとめたものが図3
である。正・逆回転ローラ2が回転している間は,その
回転方向に関わらず,搬送ローラ5は常に時計方向に回
転することがわかる。
FIG. 2 shows the positive and negative gear trains by the first gear train 3.
The connection status between the reverse rotation roller 2 and the transport roller 5 is shown.
The driving force from the driving motor 1 transmitted to the forward / reverse rotating roller 2 is transmitted to the gear 3a via the driving gear 2a and the one-way rotating clutch 10. The one-way rotation clutch 1
0 transmits only clockwise rotation when viewed in the direction of FIG.
When the motor rotates in the reverse direction, the motor idles. Further, the first gear train is composed of three gears 3a, 3b, 3c arranged in series, so that the forward / reverse rotating roller 2 and the transport roller 5 rotate in the same direction. Therefore, only when the forward / reverse rotation roller 2 rotates clockwise by the first gear train, the transport roller 5 also rotates clockwise. The second gear train is basically configured similarly to the first gear train shown in FIG. The only difference between the second gear train and the first gear train is that the rotation transmission direction of the one-way rotation clutch 10 is opposite and the number of gears is two. In the case of the second gear train, the one-way rotation clutch 10 transmits only rotation in the counterclockwise direction as viewed in the direction of FIG. 1, and idles during reverse rotation. Further, since the number of gears is two, that is, 4a and 4b, the forward / reverse rotation roller 2 and the transport roller 5 rotate in reverse directions by the second gear train. Therefore, the second
Only when the forward / reverse rotation roller 2 rotates counterclockwise due to the gear train, the transport roller 5 reversely rotates clockwise. FIG. 3 is a table summarizing the rotation transmission status of each part by the first gear train and the second gear train described above.
It is. It can be seen that, while the forward / reverse rotation roller 2 is rotating, the transport roller 5 always rotates clockwise regardless of the rotation direction.

【0010】次に,本装置における用紙反転動作(スイ
ッチバック)を,図1を用いて順に説明する。給紙通路
11側から送られてきた用紙は,案内板9に案内されて
矢印X1のように搬送され,時計回りに回転する正・逆
回転ローラ2と,補助ローラ2bの間に挟まれ,反転通
路12へ送られる。用紙が反転通路12に完全に引き込
まれると,今度は上記正・逆回転ローラ2は反時計方向
に回転し,用紙は矢印X2のように排出通路13方向へ
搬送される。その際,上述したように,搬送ローラ5は
第2ギア列によって時計方向に回転しているため,上記
正・逆回転ローラ2から送られてきた用紙は上記搬送ロ
ーラ5,及び補助ローラ5bによって排出通路へ引き込
まれる。用紙が上記正・逆回転ローラ2から搬送ローラ
5に渡されると,上記正・逆回転ローラは再度時計方向
に回転し,次の用紙を給紙通路11方向から反転通路1
2方向へ搬送する。その間も上記搬送ローラ5は,第1
ギア列によって時計方向に回転しているため,先に引き
込んだ用紙を,矢印X3の方向に搬送する。搬送ローラ
6,7,8は,駆動ギア5a及びタイミングベルト16
を介して,搬送ローラ5と同方向に回転しており,用紙
を排出口14まで順次送りだしてゆく。
Next, the sheet reversing operation (switchback) in the present apparatus will be described in order with reference to FIG. The paper sent from the paper feed path 11 side is guided by the guide plate 9 and conveyed as indicated by an arrow X1, and is sandwiched between the forward / reverse rotation roller 2 rotating clockwise and the auxiliary roller 2b. It is sent to the reversing path 12. When the sheet is completely drawn into the reversing path 12, the forward / reverse rotation roller 2 rotates counterclockwise, and the sheet is conveyed in the direction of the discharge path 13 as indicated by an arrow X2. At this time, as described above, since the transport roller 5 is rotating clockwise by the second gear train, the paper sent from the forward / reverse rotation roller 2 is transported by the transport roller 5 and the auxiliary roller 5b. It is drawn into the discharge passage. When the sheet is transferred from the forward / reverse rotating roller 2 to the transport roller 5, the forward / reverse rotating roller rotates clockwise again to feed the next sheet from the sheet feeding path 11 to the reverse path 1.
Convey in two directions. During that time, the transport roller 5 is also in the first position.
Since the sheet is rotated clockwise by the gear train, the previously drawn sheet is conveyed in the direction of arrow X3. The transport rollers 6, 7, and 8 include a drive gear 5a and a timing belt 16
, And rotates in the same direction as the transport roller 5, and sequentially feeds the sheet to the discharge port 14.

【0011】以上のような動作を繰り返すことによっ
て,本装置は連続して用紙反転動作を行うことができ
る。以上説明したように,本実施の形態に係る用紙搬送
装置は,互いに回転伝達方向の異なる二系統の第1及び
第2のギア列を用いて,正・逆回転ローラの回転を搬送
ローラに伝達している。従って,搬送ローラに専用の駆
動装置を取り付けることなく,また,全く別の駆動源か
ら駆動力を得ることなく,正・逆回転モータのみによっ
て,正・逆回転ローラ及び搬送ローラを駆動することが
可能である。更に,正・逆回転ローラ回転時には,その
回転方向に関わらず常に搬送ローラが同一方向(搬送方
向)に回転しているため,排出通路13内で用紙が停止
する従来の装置のような紙詰まりを生じることなく用紙
の反転,搬送を行うことが可能である。
By repeating the above operations, the apparatus can continuously perform the sheet reversing operation. As described above, the paper transport device according to the present embodiment transmits the rotation of the forward / reverse rotation roller to the transport roller by using the two first and second gear trains having different rotation transmission directions. doing. Therefore, it is possible to drive the forward / reverse rotating roller and the transport roller only by the forward / reverse rotating motor without attaching a dedicated driving device to the transport roller and without obtaining driving force from a completely different driving source. It is possible. Further, when the forward / reverse rotation roller rotates, the conveyance roller is always rotating in the same direction (conveyance direction) regardless of the rotation direction. It is possible to reverse and convey the paper without causing the problem.

【0012】[0012]

【実施例】上記実施の形態では,同方向回転手段(逆方
向回転手段)が奇数個(偶数個)のギアからなるギア列
で構成されているが,正・逆回転ローラの回転方向を反
対に設定する場合には,同方向回転伝達手段(逆回転伝
達手段)を偶数個(奇数個)のギアからなるギア列で構
成することができる。
DESCRIPTION OF THE PREFERRED EMBODIMENTS In the above embodiment, the same direction rotating means (reverse direction rotating means) is constituted by a gear train composed of an odd number (even number) of gears. , The same direction rotation transmitting means (reverse rotation transmitting means) can be constituted by a gear train composed of an even number (odd number) of gears.

【0013】[0013]

【発明の効果】本発明に係る用紙搬送装置は,正・逆回
転ローラと搬送ローラとの間に,上記正・逆回転ローラ
と上記搬送ローラとを同方向に回転させる同方向回転伝
達手段と,上記正・逆回転ローラと上記搬送ローラとを
逆方向に回転させる逆方向回転伝達手段の二系統の伝達
手段を具備し,上記正・逆回転ローラの回転方向に応じ
て上記二系統の伝達手段を切り換える切り換え手段によ
って上記正・逆回転ローラ回転時に常に上記搬送ローラ
が同一方向(搬送方向)に回転するように構成されてい
るため,正・逆回転ローラ用モータのみの駆動力によっ
て正・逆回転ローラ及び搬送ローラを駆動し,上記正・
逆回転ローラ回転時に常に上記搬送ローラを同一方向
(搬送方向)に回転させることができ,紙詰まりなく用
紙を反転,搬送することが可能である。
According to the present invention, there is provided a sheet transport device comprising: a same-direction rotation transmitting means for rotating the forward / reverse rotation roller and the transport roller in the same direction between the forward / reverse rotation roller and the transport roller; And a reverse rotation transmission means for rotating the forward / reverse rotation roller and the transport roller in the reverse direction, and the two transmission means are provided in accordance with the rotation direction of the forward / reverse rotation roller. Since the conveying roller is always rotated in the same direction (conveying direction) when the forward / reverse rotating roller is rotated by the switching means for switching the means, the forward / reverse rotating roller is driven only by the driving force of the forward / reverse rotating roller motor. Driving the reverse rotation roller and the transport roller,
The transport roller can always be rotated in the same direction (transport direction) when the reverse rotation roller rotates, and the paper can be reversed and transported without paper jam.

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

【図1】 本発明の実施の形態に係る用紙搬送装置の概
略構成を示す図。
FIG. 1 is a diagram illustrating a schematic configuration of a sheet conveying device according to an embodiment of the present invention.

【図2】 第1ギア列の構成を示す概念図。FIG. 2 is a conceptual diagram showing a configuration of a first gear train.

【図3】 各主要回転部の回転伝達状況を示す図。FIG. 3 is a diagram showing a rotation transmission state of each main rotating unit.

【図4】 従来の用紙搬送装置を示す図。FIG. 4 is a diagram showing a conventional paper transport device.

【符号の説明】[Explanation of symbols]

1…駆動モータ 1a…駆動軸 2…正・逆回転ローラ 2a…駆動ギア 3…第1ギア列 3a…ギア 3b…ギア 3c…ギア 4…第1ギア列 4a…ギア 4b…ギア 5…搬送ローラ 5a…駆動ギア 5b…補助ローラ 6…搬送ローラ 7…搬送ローラ 8…搬送ローラ 9…案内板 10…一方向回転クラッチ 11…給紙通路 12…反転通路 13…排出通路 14…排出口 15…タイミングベルト 16…タイミングベルト DESCRIPTION OF SYMBOLS 1 ... Drive motor 1a ... Drive shaft 2 ... Forward / reverse rotation roller 2a ... Drive gear 3 ... 1st gear train 3a ... Gear 3b ... Gear 3c ... Gear 4 ... 1st gear train 4a ... Gear 4b ... Gear 5 ... Transport roller 5a ... drive gear 5b ... auxiliary roller 6 ... transport roller 7 ... transport roller 8 ... transport roller 9 ... guide plate 10 ... one-way rotating clutch 11 ... paper feed path 12 ... reversal path 13 ... discharge path 14 ... discharge port 15 ... timing Belt 16 ... Timing belt

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 一方向に回転することによって用紙を給
紙通路から反転通路方向へ搬送し,逆方向に回転するこ
とによって上記用紙を反転通路から搬送通路方向へ搬送
する正・逆回転ローラと,該正・逆回転ローラによって
搬送通路方向へ搬送された用紙を搬送通路に沿って搬送
する搬送ローラと,上記正・逆回転ローラを駆動する駆
動手段とを具備する用紙搬送装置において,上記正・逆
回転ローラと上記搬送ローラとの間に設けられ,上記正
・逆回転ローラと上記搬送ローラとを同方向に回転させ
る同方向回転伝達手段と,上記正・逆回転ローラと上記
搬送ローラとの間に設けられ,上記正・逆回転ローラと
上記搬送ローラとを逆方向に回転させる逆方向回転伝達
手段と,上記正・逆回転ローラの回転方向に応じて上記
二系統の伝達手段を切り換える切り換え手段とを具備
し,上記切り換え手段によって上記同方向回転伝達手段
と逆方向回転伝達手段による二系統の伝達手段を切り換
えることによって上記正・逆回転ローラの回転時に常に
上記搬送ローラが搬送方向に回転するようにしたことを
特徴とする用紙搬送装置。
1. A forward / reverse rotating roller for transporting a sheet from a paper feeding path to a reversing path by rotating in one direction, and transporting the sheet from the reversing path to a conveying path by rotating in a reverse direction. A paper transport device comprising: a transport roller for transporting a sheet transported in the transport path direction by the forward / reverse rotation roller along the transport path; and a drive unit for driving the forward / reverse rotation roller. A same-direction rotation transmitting means provided between the reverse rotation roller and the transport roller to rotate the forward / reverse rotation roller and the transport roller in the same direction; And a reverse rotation transmitting means for rotating the forward / reverse rotating roller and the transport roller in reverse directions, and the two transmission means in accordance with the rotating direction of the forward / reverse rotating roller. Switching means for switching, the switching means switching between two transmission means, the same-direction rotation transmitting means and the reverse rotation transmitting means, so that the transport roller always rotates in the transport direction when the forward and reverse rotation rollers rotate. A paper transport device characterized in that the paper transport device rotates.
【請求項2】 上記同方向回転伝達手段が,上記正・逆
回転ローラと上記搬送ローラ間を直列に連結する奇数個
又は偶数個の第1のギヤ列によって構成され,上記逆方
向回転伝達手段が,上記正・逆回転ローラと上記搬送ロ
ーラ間を直列に連結する偶数個又は奇数個の第2のギヤ
列によって構成され,上記切り換え手段が,上記第1の
ギヤ列及び第2のギヤ列にそれぞれ設置され,互いに異
なる回転伝達方向をもつ一組の一方向回転クラッチであ
る請求項1記載の用紙搬送装置。
2. The same-direction rotation transmitting means is constituted by an odd-numbered or even-numbered first gear train that connects the forward-reverse rotating roller and the transport roller in series. Is constituted by an even number or an odd number of second gear trains connecting the forward / reverse rotation roller and the transport roller in series, and the switching means comprises the first gear train and the second gear train. 2. The sheet conveying device according to claim 1, wherein the pair of one-way rotating clutches are respectively installed in a plurality of different directions and have mutually different rotation transmitting directions.
JP8180309A 1996-07-10 1996-07-10 Paper sheet conveyance device Pending JPH1025048A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP8180309A JPH1025048A (en) 1996-07-10 1996-07-10 Paper sheet conveyance device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP8180309A JPH1025048A (en) 1996-07-10 1996-07-10 Paper sheet conveyance device

Publications (1)

Publication Number Publication Date
JPH1025048A true JPH1025048A (en) 1998-01-27

Family

ID=16080966

Family Applications (1)

Application Number Title Priority Date Filing Date
JP8180309A Pending JPH1025048A (en) 1996-07-10 1996-07-10 Paper sheet conveyance device

Country Status (1)

Country Link
JP (1) JPH1025048A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000050844A (en) * 1999-01-15 2000-08-05 윤종용 Printer
JP2002169403A (en) * 2000-12-04 2002-06-14 Canon Inc Image forming device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20000050844A (en) * 1999-01-15 2000-08-05 윤종용 Printer
JP2002169403A (en) * 2000-12-04 2002-06-14 Canon Inc Image forming device
JP4700800B2 (en) * 2000-12-04 2011-06-15 キヤノン株式会社 Image forming apparatus

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