JP3157346B2 - Paper feeder - Google Patents
Paper feederInfo
- Publication number
- JP3157346B2 JP3157346B2 JP11225093A JP11225093A JP3157346B2 JP 3157346 B2 JP3157346 B2 JP 3157346B2 JP 11225093 A JP11225093 A JP 11225093A JP 11225093 A JP11225093 A JP 11225093A JP 3157346 B2 JP3157346 B2 JP 3157346B2
- Authority
- JP
- Japan
- Prior art keywords
- paper
- roller
- stopper
- rotating member
- shaft
- 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)
- Sheets, Magazines, And Separation Thereof (AREA)
Description
【0001】[0001]
【産業上の利用分野】この発明は、プリンタ・複写機・
ファクシミリ・スキャナなどに備える給紙装置に関す
る。詳しくは、ピックアップコロをセット用紙に押し当
て、そのセット用紙をピックアップコロの回転により繰
り出し、給紙コロで一枚ずつ分離して送り出す給紙装置
に関する。BACKGROUND OF THE INVENTION The present invention relates to a printer, a copier,
The present invention relates to a sheet feeding device provided in a facsimile scanner or the like. More specifically, the present invention relates to a sheet feeding device in which a pickup roller is pressed against a set sheet, the set sheet is fed by the rotation of the pickup roller, and the sheet is separated and fed one by one by a sheet feed roller.
【0002】[0002]
【従来の技術】従来、この種の給紙装置の中には、たと
えば図9に示すような構成のものがある。すなわち、セ
ット用紙を送り出すとき、図中符号Mで示す駆動モータ
の駆動により、コロホルダ1で保持する給紙コロ2およ
びピックアップコロ3を回転する。一方、符号Sで示す
ソレノイドを作動してシャフトaをアームbを介し矢印
イ方向に回動し、そのシャフトa上のアームcで回動部
材4の一端を蹴ってそれを固定軸dを中心として回動
し、その他端をストッパ軸e上のアームfに当てて用紙
ストッパ5を回動し、その用紙ストッパ5を、図10で
示す給紙規制位置から図11で示す適宜給紙位置まで押
し下げる。それとともに、図9に示すように、シャフト
a上の一対のアームgとコロホルダ1との係合を解いて
重力に基づきそのコロホルダ1を給紙コロ軸hを中心と
して回動し、図11に示すように、ピックアップコロ3
をセット用紙Pに押し当てる。そして、そのピックアッ
プコロ3の回転により用紙Pを繰り出し、給紙コロ2と
分離コロ6間を通して一枚ずつ分離して送り出してい
た。2. Description of the Related Art Conventionally, among this type of paper feeder, there is one having a configuration as shown in FIG. 9, for example. That is, when a set sheet is sent out, the sheet feed roller 2 and the pickup roller 3 held by the roller holder 1 are rotated by driving of a drive motor indicated by reference numeral M in the drawing. On the other hand, the solenoid indicated by S is actuated to rotate the shaft a in the direction of the arrow A through the arm b, and the arm c on the shaft a kicks one end of the rotating member 4 to move it around the fixed axis d. The paper stopper 5 is rotated by contacting the other end to the arm f on the stopper shaft e, and the paper stopper 5 is moved from the paper supply restricting position shown in FIG. 10 to the appropriate paper supply position shown in FIG. Push down. At the same time, as shown in FIG. 9, the pair of arms g on the shaft a and the roller holder 1 are disengaged from each other, and the roller holder 1 is rotated about the paper feed roller shaft h based on gravity, and as shown in FIG. As shown, pickup roller 3
Is pressed against the set sheet P. Then, the paper P is fed out by the rotation of the pickup roller 3, and is separated and fed one by one through the space between the paper feed roller 2 and the separation roller 6.
【0003】[0003]
【発明が解決しようとする課題】ところが、そのような
従来の給紙装置では、回動部材4で用紙ストッパ5を適
宜給紙位置まで回動するたびに、その回動部材4の両端
にそれぞれアームc・fが当たる構成とするから、その
アームc・fと回動部材4にその摩擦箇所で摩耗を生
じ、その摩耗が原因で、経時により作動不良を起こすと
いう問題があった。However, in such a conventional paper feeding device, each time the paper stopper 5 is rotated to the paper feeding position by the rotating member 4, the two ends of the rotating member 4 are respectively provided. Since the arms c and f are configured to be in contact with each other, there is a problem that the arms c and f and the rotating member 4 are worn at the frictional portions, and the abrasion causes malfunctions over time.
【0004】そこで、この発明の目的は、そのような回
動部材などの摩耗が原因で、経時により給紙装置が作動
不良を起こすことを防止することにある。An object of the present invention is to prevent a paper feeder from malfunctioning over time due to wear of such a rotating member.
【0005】[0005]
【課題を解決するための手段】そのため、この発明は、
たとえば以下の図示実施例において示すとおり、用紙ス
トッパ50を給紙規制位置と適宜給紙位置とに回動自在
に備えるとともに、ピックアップコロ16と給紙コロ1
7とをコロホルダ35で回転自在に支持してそのコロホ
ルダ35を給紙コロ軸30を中心として回動自在とし、
前記給紙規制位置にある前記用紙ストッパ50に突き当
てて原稿Pのような用紙を積載セットして後、回動部材
45で前記用紙ストッパ50を前記適宜給紙位置まで回
動し、前記コロホルダ35を回動して前記ピックアップ
コロ16をセット用紙に押し当て、前記ピックアップコ
ロ16の回転により用紙を繰り出し、前記給紙コロ17
で一枚ずつ分離して送り出す給紙装置15において、前
記回動部材45に、前記用紙ストッパ50に押し当てて
それを回動する押当て部45eを設け、その押当て部4
5eを、前記給紙コロ軸30を中心とする円弧形状に形
成し、前記回動部材45を、前記コロホルダ35ととも
に前記給紙コロ軸30を中心として回動自在としてな
る、ことを特徴とする。Accordingly, the present invention provides
For example, as shown in the embodiment shown below, the paper stopper 50 is rotatably provided between a paper supply restricting position and an appropriate paper supply position, and the pickup roller 16 and the paper supply roller 1 are provided.
And 7 are rotatably supported by a roller holder 35, and the roller holder 35 is rotatable about a sheet feeding roller shaft 30,
After stacking and setting sheets such as the document P by abutting the sheet stopper 50 at the sheet supply restricting position, the sheet stopper 50 is rotated by the rotating member 45 to the appropriate sheet supply position, and the roller holder is rotated. 35, the pickup roller 16 is pressed against the set sheet, and the sheet is fed out by the rotation of the pickup roller 16, and the sheet feed roller 17 is rotated.
In the sheet feeding apparatus 15 for feeding by separating one by one, before
By pressing the paper stopper 50 against the rotating member 45
A pressing portion 45e for rotating the pressing portion 45e is provided.
5e into an arc shape centered on the feed roller shaft 30.
The rotation member 45 is rotatable together with the roller holder 35 about the paper feed roller shaft 30.
【0006】[0006]
【0007】[0007]
【0008】[0008]
【0009】[0009]
【作用】そして、給紙規制位置にある用紙ストッパ50
に用紙を突き当てて積載セットする。その積載セット
後、回動部材45をコロホルダ35とともに給紙コロ軸
30を中心として回動し、ピックアップコロ16をセッ
ト用紙に押し当てるとともに、この回動部材45を回動
するとき、その押当て部45eを用紙ストッパ50に押
し当ててその用紙ストッパ50を適宜給紙位置まで回動
する。そして、用紙ストッパ50を適宜給紙位置まで回
動して後さらに回動部材45を回動したとき、回動部材
45は、押当て部45eを、給紙コロ軸30を中心とす
る円弧状に回動して用紙ストッパ50に接触するだけ
で、その用紙ストッパ50を適宜給紙位置を越えてさら
に回動させることはない。 The paper stopper 50 is located at the paper feed restricting position.
The paper is pressed against and loaded. After the stacking setting, the rotating member 45 is rotated together with the roller holder 35 about the feed roller shaft 30 to press the pickup roller 16 against the set sheet and rotate the rotating member 45 .
Press the pressing portion 45e against the paper stopper 50.
Then, the paper stopper 50 is rotated to the paper feeding position as needed. Then, rotate the paper stopper 50 appropriately to the paper feeding position.
When the rotating member 45 is further rotated after moving, the rotating member
Reference numeral 45 designates the pressing portion 45e with the feed roller shaft 30 as the center.
Just rotate in the shape of an arc and touch the paper stopper 50
Then, the paper stopper 50 is appropriately moved beyond the paper feeding position.
Is not rotated.
【0010】[0010]
【0011】[0011]
【0012】[0012]
【0013】[0013]
【実施例】以下、図面を参照しつつ、この発明の実施例
について説明する。図7は、この発明の一実施例である
給紙装置を備える画像読取装置であり、その全体概略構
成を示す。Embodiments of the present invention will be described below with reference to the drawings. FIG. 7 shows an image reading apparatus provided with a sheet feeding apparatus according to an embodiment of the present invention, and shows an overall schematic configuration thereof.
【0014】図中符号10は、装置本体である。装置本
体10は、下構造体10aと、その下構造体10aに対
し回動支点ピンqを中心として開閉自在に設ける上構造
体10bとで構成する。Reference numeral 10 in the figure denotes an apparatus main body. The apparatus main body 10 is composed of a lower structure 10a and an upper structure 10b provided to be freely openable and closable about the rotation fulcrum pin q with respect to the lower structure 10a.
【0015】下構造体10aは、その原稿搬送方向Aの
手前側(図7中右側)に、原稿Pを積載セットする原稿
台11を設け、図中左の前方側に排紙トレイ12を設け
る。原稿台11上には、原稿Pの両側縁を規制する一対
のサイドガイド13を設ける。そして、下構造体10a
と上構造体10bとの間に、図7中矢示する搬送路14
を形成してなる。The lower structure 10a is provided with a document table 11 on which documents P are stacked and set on the near side (the right side in FIG. 7) in the document transport direction A, and a paper discharge tray 12 on the left front side in the figure. . A pair of side guides 13 that regulate both side edges of the document P are provided on the document table 11. And the lower structure 10a
7 and the upper structure 10b.
Is formed.
【0016】また、下構造体10aは、原稿台11の前
方に、点線で囲んで示すこの発明の給紙装置15を設
け、それにピックアップコロ16および給紙コロ17を
備える。給紙コロ17のさらに前方には、順に下搬送ロ
ーラ18と密着イメ−ジセンサ19と下排紙ローラ20
を設ける。密着イメ−ジセンサ19は、支軸21で回動
自在に支持したブラケット22で保持し、押上バネ23
で上方へ付勢してなる。The lower structure 10a is provided with a paper feeder 15 according to the present invention, which is enclosed by a dotted line in front of the document table 11.
Only, it comprises a pick-up roller 16 and the paper feeding roller 17. Further in front of the paper feed roller 17, a lower transport roller 18, a contact image sensor 19, and a lower paper discharge roller 20 are sequentially arranged.
Is provided. The contact image sensor 19 is held by a bracket 22 rotatably supported by a support shaft 21 and a push-up spring 23.
To urge upwards.
【0017】他方、上構造体10bは、原稿台11の前
方に、適宜付勢手段で付勢して給紙コロ17に押し当て
る分離ブレード25を設ける。また、その分離ブレード
25のA方向前方に、下搬送ローラ18を付勢して押し
当てた上搬送ローラ26を設ける。さらに、上搬送ロー
ラ26の前方に、密着イメ−ジセンサ19を押し当てた
原稿押えローラ27を設ける。そして、その原稿押えロ
ーラ27の前方に、下排紙ローラ20を付勢して押し当
てた上排紙ローラ28を設ける。On the other hand, the upper structure 10b is provided with a separation blade 25 which is urged by an urging means and pressed against the paper feed roller 17 in front of the document table 11. In addition, an upper transport roller 26 is provided in front of the separation blade 25 in the direction A to urge and press the lower transport roller 18. Further, a document pressing roller 27 against which the contact image sensor 19 is pressed is provided in front of the upper transport roller 26. An upper discharge roller 28 is provided in front of the document pressing roller 27 to urge and press the lower discharge roller 20.
【0018】そして、この画像読取装置により画像読取
を行うときは、原稿台11上に原稿Pを積載し、その両
側縁をサイドガイド13で位置決めしてセットする。積
載セット後、この発明の給紙装置15を駆動し、後述す
るようにピックアップコロ16でセット原稿Pを繰り出
し、分離ブレード25で一枚ずつ分離して給紙コロ17
で送り出す。しかして、下上搬送ローラ18・26で搬
送し、レジスト検知センサS1で原稿Pの先端を検知し
て読取開始のタイミングを図ってから、原稿押えローラ
27で押えて密着イメージセンサ19上を通る原稿Pの
画像を密着イメージセンサ19で読み取る。読取後、排
紙検知センサS2で検知しながら適宜制御して原稿Pを
下上排紙ローラ20・28で排紙トレイ12へと排出す
る。When an image is to be read by the image reading apparatus, a document P is stacked on a document table 11, and both side edges thereof are positioned and set by a side guide 13. After the stacking and setting, the sheet feeding device 15 of the present invention is driven, and the set originals P are fed out by the pickup roller 16 as described later, and separated one by one by the separation blade 25 to feed the sheet feeding roller 17.
Send it out. Then, the document P is conveyed by the lower and upper conveying rollers 18 and 26, the leading edge of the document P is detected by the registration detection sensor S 1 to start reading, and then the document P is pressed by the document pressing roller 27 to move on the contact image sensor 19. The image of the passing document P is read by the contact image sensor 19. After reading, appropriately controlled to while detecting with ejection detecting sensor S 2 is discharged to the discharge tray 12 to the document P under the sheet discharge rollers 20, 28.
【0019】ところで、上述した給紙装置15は、詳し
くは図1および図2に示すように、給紙コロ17を、給
紙コロ軸30の一端に設けて原稿搬送方向Aと直交する
幅方向ほぼ中央に配置する。給紙コロ軸30は、図示し
ないが、その一端側を支持ブラケットで他端側を側板で
回転自在に支持する。そして、給紙コロ軸30の他端
に、駆動モータ(図示省略)の回転を伝達する歯車列と
噛み合う伝達歯車31を設ける。しかして、その他端と
伝達歯車31と間に電磁クラッチ32を設ける。In the above-described paper feeder 15, the paper feed roller 17 is provided at one end of a paper feed roller shaft 30 as shown in FIGS. Place it almost in the center. Although not shown, the feed roller shaft 30 is rotatably supported at one end by a support bracket and at the other end by a side plate. At the other end of the feed roller shaft 30, a transmission gear 31 that meshes with a gear train that transmits the rotation of a drive motor (not shown) is provided. Thus, an electromagnetic clutch 32 is provided between the other end and the transmission gear 31.
【0020】また、給紙コロ軸30には、その一端側に
コロホルダ35を回動自在に設ける。コロホルダ35
は、図2に示すように、水平板部35aと、その水平板
部35aの両側縁から各々上向きに延びる垂直板部35
b・35cとからなる。そして、一側の垂直板部35b
の外面側に給紙コロ軸30と平行な短軸36およびコロ
軸37を取り付け、短軸36で中間歯車38を回転自在
に支持し、コロ軸37で伝達歯車39とピックアップコ
ロ16を回転自在に支持する。しかして、伝達歯車39
を中間歯車38を介して給紙コロ軸30上の歯車40と
噛み合わす。そうして、図示しない戻しバネでコロホル
ダ35を常時図中時計方向に付勢して適宜部材に当て、
ピックアップコロ16を下方の適宜退避位置で保持す
る。他方、他側の垂直板部35cには、その外面側に給
紙コロ軸30との間でトルクリミッタ42を設ける。A roller holder 35 is rotatably provided at one end of the sheet feeding roller shaft 30. Roller holder 35
As shown in FIG. 2, a horizontal plate portion 35a and vertical plate portions 35 each extending upward from both side edges of the horizontal plate portion 35a.
b.35c. And the vertical plate part 35b on one side
A short shaft 36 and a roller shaft 37 parallel to the feed roller shaft 30 are attached to the outer surface of the roller, the intermediate gear 38 is rotatably supported by the short shaft 36, and the transmission gear 39 and the pickup roller 16 are rotatable by the roller shaft 37. To support. Thus, the transmission gear 39
With the gear 40 on the feed roller shaft 30 via the intermediate gear 38. Then, the roller holder 35 is constantly urged clockwise in the figure by a return spring (not shown) to appropriately contact the member,
The pickup roller 16 is held at an appropriate retracted position below. On the other hand, a torque limiter 42 is provided between the vertical plate portion 35c on the other side and the paper feed roller shaft 30 on the outer surface side.
【0021】さらに、給紙装置15は、給紙コロ軸30
とほぼ平行に回動部材45を配置する。回動部材45
は、給紙コロ軸30と平行な長軸部45aと、その長軸
部45aからその直角方向に互いに平行に伸びるアーム
部45bとを設ける。そして、各々のアーム部45bの
先端に係合部45cを設ける。一方、長軸部45aの一
端に下向きに掛け止め部45dを設け、他端に上向きに
押当て部45eを設ける。押当て部45eは、給紙コロ
軸30を中心とする円弧形状に形成してなる。Further, the sheet feeding device 15 includes a sheet feeding roller shaft 30.
The rotating member 45 is arranged substantially parallel to the above. Rotating member 45
Is provided with a long shaft portion 45a parallel to the feed roller shaft 30, and an arm portion 45b extending from the long shaft portion 45a in a direction perpendicular to the long shaft portion 45a. And the engagement part 45c is provided in the front-end | tip of each arm part 45b. On the other hand, a latch portion 45d is provided downward at one end of the long shaft portion 45a, and a pressing portion 45e is provided upward at the other end. The pressing portion 45e is formed in an arc shape centering on the feed roller shaft 30.
【0022】掛け止め部45dは、図3でも示すよう
に、長軸部45a一端をほぼコ状に折り曲げ、さらにそ
の先を内向きに曲げてフック部分45fを形成する。そ
して、係合部45cを軸受46を介して給紙コロ軸30
に取り付け、回動部材45を、その給紙コロ軸30を中
心として回動自在とするとともに、掛け止め部45dを
コロホルダ35の垂直板部35cの上縁に係合し、フッ
ク部分45fを、垂直板部35cに設ける係合穴35d
に引っ掛ける。しかして、回動部材45を、図2に示す
ように、コロホルダ35とともに給紙コロ軸30を中心
として回動自在とする。なお、この発明では、たとえば
図4および図5に示すように、垂直板部35cの端縁に
切欠き凹部35eを設け、その切欠き凹部35eに掛け
止め部45dを係合する構成としてもよい。その場合、
掛け止め部45dには、長軸部45aの一端にその軸方
向の動きを規制する鍔部分45gを設けてなる。As shown in FIG. 3, the hook portion 45d has one end of the long shaft portion 45a bent substantially in a U-shape, and the other end bent inward to form a hook portion 45f. Then, the engaging portion 45c is connected to the feed roller shaft 30 via the bearing 46.
, The rotating member 45 is rotatable about the paper feed roller shaft 30, the latching portion 45 d is engaged with the upper edge of the vertical plate portion 35 c of the roller holder 35, and the hook portion 45 f is Engagement hole 35d provided in vertical plate portion 35c
Hook on. Thus, as shown in FIG. 2, the rotating member 45 is rotatable about the sheet feeding roller shaft 30 together with the roller holder 35. In the present invention, for example, as shown in FIGS. 4 and 5, a notch recess 35e may be provided at the edge of the vertical plate portion 35c, and the latch portion 45d may be engaged with the notch recess 35e. . In that case,
The latch portion 45d is provided with a flange portion 45g at one end of the long shaft portion 45a for restricting the movement in the axial direction.
【0023】またさらに、給紙装置15は、図7でも示
すように、上構造体10b側に、加圧板48を加圧板軸
47でそれを中心としてを回動自在に支持するととも
に、用紙ストッパ50をストッパ軸49でそれを中心と
して回動自在に支持する。加圧板48は、図1に示すよ
うに、ねじりコイルバネ52で付勢して先端48aをセ
ット原稿Pに押し当ててなる。Further, as shown in FIG. 7, the sheet feeding device 15 supports the pressing plate 48 on the upper structure 10b side by a pressing plate shaft 47 so as to be rotatable about the pressing plate 48 and a paper stopper. 50 is supported by a stopper shaft 49 so as to be rotatable about the stopper shaft 49. As shown in FIG. 1, the pressure plate 48 is urged by a torsion coil spring 52 to press the leading end 48a against the set document P.
【0024】用紙ストッパ50は、図6でも示すよう
に、ストッパ軸49で基端側を取り付けるコ状のアーム
部50aと、そのアーム部50aの先端側から横向きに
のびる長板部50bとを設ける。そして、アーム部50
aの先端側に下向きに規制片50cを設け、長板部50
bの先端に下向きにL状受板部50dを設けてなる。し
かして、この用紙ストッパ50を適宜部材上に当てて止
め、図1中実線で示す給紙規制位置、すなわち、ガイド
板53・53間に形成した前記搬送路14を規制片50
cで遮る位置で保持してなる。As shown in FIG. 6, the paper stopper 50 has a U-shaped arm portion 50a to which a base end is attached by a stopper shaft 49, and a long plate portion 50b extending laterally from the distal end of the arm portion 50a. . And the arm part 50
a restricting piece 50c is provided downward on the tip side of
An L-shaped receiving plate portion 50d is provided downward at the tip of b. Then, the paper stopper 50 is appropriately stopped on the member and stopped, and the paper feed regulating position indicated by the solid line in FIG.
It is held at a position blocked by c.
【0025】さて、上述した給紙装置15では、セット
原稿Pの給紙を行うとき、前記駆動モータを駆動し、そ
の駆動力を、歯車列を介して図2に示す伝達歯車31に
伝達する。そして、電磁クラッチ32を作動してその伝
達歯車31の回転を給紙コロ軸30に伝達する。しかし
て、給紙コロ17を回転するとともに、歯車40・中間
歯車38・伝達歯車39の噛み合いを介してピックアッ
プコロ16を回転する。そうして、トルクリミッタ42
を介してコロホルダ35を図1中反時計方向に回動して
ピックアップコロ16および回動部材45を回動する。
そして、ピックアップコロ16をセット原稿Pに押し当
てるとともに、鎖線で示すように、押当て部45eをL
状受板部50dに押し当てて用紙ストッパ50を回動
し、その用紙ストッパ50を適宜給紙位置まで押し上げ
て搬送路14を開放する。しかして、ピックアップコロ
16の回転によりセット原稿Pを繰り出し、分離ブレー
ド25で一枚ずつ分離しながら給紙コロ17の回転で搬
送路14を通して送り出す。In the above-described paper feeder 15, when the set original P is fed, the drive motor is driven, and the driving force is transmitted to the transmission gear 31 shown in FIG. 2 via a gear train. . Then, the electromagnetic clutch 32 is operated to transmit the rotation of the transmission gear 31 to the feed roller shaft 30. Thus, while rotating the feed roller 17, the pickup roller 16 is rotated through meshing of the gear 40, the intermediate gear 38, and the transmission gear 39. Then, the torque limiter 42
, The roller holder 35 is rotated counterclockwise in FIG. 1 to rotate the pickup roller 16 and the rotating member 45.
Then, the pickup roller 16 is pressed against the set document P, and the pressing portion 45e is moved to the L position as indicated by a chain line.
The paper stopper 50 is rotated by pressing the paper stopper 50 d against the shape receiving plate portion 50 d, and the paper stopper 50 is appropriately raised to a paper feeding position to open the transport path 14. Then, the set original P is fed out by the rotation of the pickup roller 16, and is sent out through the transport path 14 by the rotation of the paper feed roller 17 while being separated one by one by the separation blade 25.
【0026】なお、この給紙装置15では、用紙ストッ
パ50を適宜給紙位置まで回動して後さらに回動部材4
5を回動したとき、回動部材45は、押当て部45e
を、鎖線で示すように給紙コロ軸30を中心とする円弧
状に回動して用紙ストッパ50とただ接触するだけで、
その用紙ストッパ50を適宜給紙位置を越えて回動させ
ることなく一定高さの給紙位置で保持する。しかして、
トルクリミッタ42に一定以上の負荷がかかったところ
で給紙コロ軸30がスリップしてコロホルダ35のそれ
以上の回動が止まる。In the paper feeding device 15, the paper stopper 50 is rotated to a paper feeding position as needed, and then the rotating member 4 is rotated.
5 is rotated, the rotating member 45 is pressed against the pressing portion 45e.
Is rotated in an arc around the paper feed roller shaft 30 as shown by a chain line and only comes into contact with the paper stopper 50,
The sheet stopper 50 is held at a sheet feeding position at a constant height without rotating the sheet stopper 50 appropriately beyond the sheet feeding position. Then
When a predetermined load or more is applied to the torque limiter 42, the feed roller shaft 30 slips, and the further rotation of the roller holder 35 stops.
【0027】そして、この給紙装置15では、給紙完了
後、前記駆動モータを停止して給紙コロ軸30の回転を
止め、コロホルダ35を重力により図1中時計方向に回
動する。しかして、ピックアップコロ16を回動して元
の退避位置に戻すとともに、回動部材45を回動して用
紙ストッパ50を元の給紙規制位置に戻す。In the sheet feeding device 15, after the sheet feeding is completed, the drive motor is stopped to stop the rotation of the sheet feeding roller shaft 30, and the roller holder 35 is rotated clockwise in FIG. 1 by gravity. Then, the pickup roller 16 is rotated to return to the original retracted position, and the rotating member 45 is rotated to return the paper stopper 50 to the original paper feed restricting position.
【0028】ところで、上述した図示実施例では、回動
部材45を、軸受46を介して給紙コロ軸30で回動自
在に支持した。しかし、そのような軸受を用いないで、
直接に給紙コロ軸30で回動部材45を回動自在に支持
する構成とすることもできる。In the illustrated embodiment, the rotating member 45 is rotatably supported by the feed roller shaft 30 via the bearing 46. However, without using a bearing, such as its,
It is also possible to adopt a configuration in which the rotating member 45 is directly rotatably supported by the paper feed roller shaft 30.
【0029】すなわち、この他の例では、回動部材45
を弾性材料でつくり、たとえば図8に示すように、その
係合部45cを円弧状に形成する。そして、回動部材4
5は、その係合部45cを、弾性変形して給紙コロ軸3
0にはめ付けかつそれと摺動してそのまわりに回動自在
に取り付ける構成とする。That is, in this other example , the rotating member 45
Is made of an elastic material, and its engaging portion 45c is formed in an arc shape, for example, as shown in FIG. And the rotating member 4
Reference numeral 5 denotes a paper feed roller shaft 3 which elastically deforms the engagement portion 45c.
It is configured to be fitted to zero and to be slidably attached to and rotatable therearound.
【0030】また、その給紙装置15では、用紙ストッ
パ50の上方にステー(規制部材)60を設ける。In the paper feeding device 15, a stay (a regulating member) 60 is provided above the paper stopper 50.
【0031】しかして、この他の例では、回動部材45
を回動して用紙ストッパ50を適宜給紙位置へと回動す
るとき、その用紙ストッパ50をステー60に当ててそ
の回動ストロークを規制し、用紙ストッパ50が図8中
鎖線で示す適宜給紙位置を越えて回動することを阻止す
る。However, in this other example , the rotating member 45
When the paper stopper 50 is rotated to the paper feeding position by rotating the paper stopper 50, the paper stopper 50 is brought into contact with the stay 60 to regulate the rotation stroke. Prevents rotation beyond the paper position.
【0032】そして、ステー60で用紙ストッパ50の
回動を阻止して後さらに回動部材45が回動したとき
は、その回動部材45が撓んでそのオーバーストローク
を吸収し、用紙ストッパ50を一定高さの適宜給紙位置
で保持する。しかして、トルクリミッタ42に一定以上
の負荷がかかったところで給紙コロ軸30がスリップし
てコロホルダ35のそれ以上の回動が止まる。When the rotation of the paper stopper 50 is stopped by the stay 60 and the rotation member 45 is further rotated, the rotation member 45 bends to absorb the overstroke, and the paper stopper 50 is released. The sheet is held at an appropriate sheet feeding position at a constant height. Thus, when a certain load or more is applied to the torque limiter 42, the paper feed roller shaft 30 slips, and the further rotation of the roller holder 35 stops.
【0033】[0033]
【発明の効果】したがって、この発明によれば、回動部
材を、コロホルダとともに給紙コロ軸を中心として回動
自在とするとともにコロホルダに連結する構成とするか
ら、回動部材を回動するたびにそれが従来のように適宜
アーム等に当たる箇所を少なくし、これにより、回動部
材などに摩耗を生じ、その摩耗が原因で経時により給紙
装置が作動不良を起こすことを防止することができる。Therefore, according to the present invention, the rotating member is configured to be rotatable about the paper feed roller shaft together with the roller holder and is connected to the roller holder, so that each time the rotating member is rotated. In addition, it is possible to reduce the number of places where it hits the arm or the like as required in the related art, thereby preventing the rotation member or the like from being worn and preventing the paper feeder from malfunctioning over time due to the wear. .
【0034】また、その回動部材の押当て部を給紙コロ
軸を中心とする円弧形状に形成することから、用紙スト
ッパを適宜給紙位置まで回動して後さらに回動部材を回
動したとき、その押当て部を給紙コロ軸を中心とする円
弧状に回動して用紙ストッパと接触するだけとし、これ
により、その用紙ストッパをそれ以上適宜給紙位置を越
えて回動することを防止することができる。 Further, turned from forming an arc shape around the paper feed roller shaft portion Pushing the pivot member, a further pivoting member after rotates the sheet stopper to properly feed position Then, the pressing portion is rotated in an arc shape about the paper feed roller shaft and only comes into contact with the paper stopper, whereby the paper stopper is further rotated beyond the paper feed position as appropriate. Can be prevented.
【0035】[0035]
【0036】[0036]
【図1】この発明の一実施例である給紙装置の概略側面
図である。FIG. 1 is a schematic side view of a sheet feeding device according to an embodiment of the present invention.
【図2】その斜視図である。FIG. 2 is a perspective view thereof.
【図3】その給紙装置において、回動部材をコロホルダ
に掛け止める構造を示す縦断面図である。FIG. 3 is a longitudinal sectional view showing a structure in which a rotating member is hung on a roller holder in the paper feeding device.
【図4】その掛け止め構造の他例を示す斜視図である。FIG. 4 is a perspective view showing another example of the latch structure.
【図5】その部分側面図である。FIG. 5 is a partial side view thereof.
【図6】その給紙装置において、用紙ストッパと給紙コ
ロと回転部材の配置関係を示す斜視図である。FIG. 6 is a perspective view showing an arrangement relationship between a sheet stopper, a sheet feeding roller, and a rotating member in the sheet feeding device.
【図7】その給紙装置を備える画像読取装置の全体概略
構成図である。FIG. 7 is an overall schematic configuration diagram of an image reading apparatus including the sheet feeding device.
【図8】他の例である給紙装置の概略側面図である。FIG. 8 is a schematic side view of a sheet feeding device as another example .
【図9】従来の給紙装置の斜視図である。FIG. 9 is a perspective view of a conventional sheet feeding device.
【図10】その給紙装置において、回動部材を給紙規制
位置とした状態説明図である。FIG. 10 is an explanatory diagram of a state in which the rotating member is set to a paper feed restricting position in the paper feeding device.
【図11】その回動部材を適宜給紙位置とした状態説明
図である。FIG. 11 is an explanatory diagram showing a state in which the rotating member is appropriately set at a sheet feeding position.
15 給紙装置 16 ピックアップコロ 17 給紙コロ 30 給紙コロ軸 35 コロホルダ 45 回動部材 45c 係合部 45e 押当て部 50 用紙ストッパ 60 ステー(規制部材) P 原稿(用紙) 15 Paper Feeder 16 Pickup Roller 17 Paper Feed Roller 30 Paper Feed Roller Shaft 35 Roller Holder 45 Rotating Member 45c Engaging Part 45e Pressing Part 50 Paper Stopper 60 Stay (Regulator) P Document (Paper)
Claims (1)
位置とに回動自在に備えるとともに、ピックアップコロ
と給紙コロとをコロホルダで回転自在に支持してそのコ
ロホルダを給紙コロ軸を中心として回動自在とし、前記
給紙規制位置にある前記用紙ストッパに突き当てて用紙
を積載セットして後、回動部材で前記用紙ストッパを前
記適宜給紙位置まで回動し、前記コロホルダを回動して
前記ピックアップコロをセット用紙に押し当て、前記ピ
ックアップコロの回転により用紙を繰り出し、前記給紙
コロで一枚ずつ分離して送り出す給紙装置において、前
記回動部材に、前記用紙ストッパに押し当ててそれを回
動する押当て部を設け、その押当て部を、前記給紙コロ
軸を中心とする円弧形状に形成し、前記回動部材を、前
記コロホルダとともに前記給紙コロ軸を中心として回動
自在としてなる、給紙装置。A paper stopper is rotatably provided between a paper supply regulating position and a paper supply position as appropriate, and a pickup roller and a paper supply roller are rotatably supported by a roller holder, and the roller holder is provided with a paper supply roller shaft. After the sheets are stacked and set by abutting against the paper stopper at the paper supply regulating position, the paper stopper is rotated to the appropriate paper supply position by a rotating member, and the roller holder is rotated. by rotating pressed against the pickup roller to set paper feeding sheets by the rotation of the pickup roller, the paper feeding device for feeding separated one by one by the paper feed roller, before
Press the paper stopper against the rotating member and rotate it.
And a pressing portion for moving the paper feed roller.
A paper feeding device formed in an arc shape about a shaft, wherein the rotating member is rotatable about the paper feeding roller shaft together with the roller holder.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11225093A JP3157346B2 (en) | 1993-04-15 | 1993-04-15 | Paper feeder |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP11225093A JP3157346B2 (en) | 1993-04-15 | 1993-04-15 | Paper feeder |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH06298391A JPH06298391A (en) | 1994-10-25 |
JP3157346B2 true JP3157346B2 (en) | 2001-04-16 |
Family
ID=14582009
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP11225093A Expired - Fee Related JP3157346B2 (en) | 1993-04-15 | 1993-04-15 | Paper feeder |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3157346B2 (en) |
-
1993
- 1993-04-15 JP JP11225093A patent/JP3157346B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JPH06298391A (en) | 1994-10-25 |
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