JPH0717643A - Sheet material feeder - Google Patents
Sheet material feederInfo
- Publication number
- JPH0717643A JPH0717643A JP5186685A JP18668593A JPH0717643A JP H0717643 A JPH0717643 A JP H0717643A JP 5186685 A JP5186685 A JP 5186685A JP 18668593 A JP18668593 A JP 18668593A JP H0717643 A JPH0717643 A JP H0717643A
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- cam member
- paper feed
- feeding
- relay gear
- 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
- Paper Feeding For Electrophotography (AREA)
- Controlling Sheets Or Webs (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、複写機、プリンタ、フ
ァクシミリ等の画像形成装置に使用する給送装置に係
り、特にシート積載台を用いた給送装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sheet feeding device used for an image forming apparatus such as a copying machine, a printer, a facsimile, and more particularly to a sheet feeding device using a sheet stacking table.
【０００２】[0002]
【従来の技術】従来より複写機やファクシミリの原稿や
転写紙、若しくはプリンタの記録紙等（以下シート材と
いう）を１枚づつ自動給送する給送機構として、所定サ
イズのシート材を積載収納したカセットを装置本体側に
装着し、装置本体側の給送ローラ等の給送手段より、１
枚づつ給送するカセット給送方式と、装置本体内の積載
台上に直接積載したシート材を給送手段により、１枚づ
つ給送する積載台給送方式とが存在し、後者の方式は任
意のサイズのシート材を数十枚単位で直接積載台上に載
置すればよいため簡便且つ汎用的であり、この為パーソ
ナルユースの低コストの画像形成装置に多く用いられて
いる。2. Description of the Related Art Conventionally, sheet materials of a predetermined size are stacked and stored as a feeding mechanism for automatically feeding the originals or transfer sheets of copying machines or facsimiles, recording sheets of printers (hereinafter referred to as sheet materials) one by one. The cassette is attached to the main body of the apparatus, and the feeding means such as a feeding roller on the main body of the apparatus is used to
There are a cassette feeding system that feeds the sheets one by one and a loading platform feeding system that feeds the sheet material directly loaded on the loading platform in the apparatus main body one by one by the feeding means. It is simple and versatile because it is sufficient to place several tens of sheet materials of arbitrary size directly on the stacking table, and is therefore often used in low-cost image forming apparatuses for personal use.
【０００３】かかる給送装置において、一般に積載台が
バネにより給送ローラ側に付勢されているために、積載
台上にシート材補給時若しくは停止時に給送ローラに軸
支したカム等を利用して前記積載台を給送ローラから強
制的に離間させ、シート材の補給の容易化を図っている
が、カム板と給紙ローラが一体的に連結されていること
は、シート材給紙時にカム板が回転し積載台の押し下げ
を解除すると同時に給送ローラも回転を開始している為
に、シート材の給送開始位置の相違によりその開始タイ
ミングのずれが生じる。給送ローラの回転角がカム板に
よって制限を受ける等の種々の問題を生じる。In such a feeding device, since the loading table is generally biased toward the feeding roller by a spring, a cam or the like axially supported by the feeding roller is used when the sheet material is replenished or stopped on the loading table. In order to facilitate the replenishment of the sheet material by forcibly separating the stacking table from the feeding roller, the fact that the cam plate and the feeding roller are integrally connected means that the sheet material is fed. At the same time, the cam plate rotates to release the pushing down of the stacking table, and at the same time, the feeding roller also starts to rotate, so that the start timing of the sheet material shifts due to the difference in the feeding start position of the sheet material. Various problems occur such that the rotation angle of the feeding roller is limited by the cam plate.
【０００４】かかる欠点を解消するために、特公平２−
６２４５１号に示すように、シート材を積載するシート
積載台１０２と、前記シート積載台１０２上に積載され
たシート材を順次給送する給紙ローラ１３２と、前記給
紙ローラ１３２とシート材とを互いに接触または離間さ
せるカム部材１３６と、前記給紙ローラ１３２とカム部
材１３６とに駆動力を与える駆動源（メインモ−タ）
と、を有する給送装置において、前記給紙ローラ１３２
に前記駆動源の駆動力を選択的に伝達するバネクラッチ
１３５と、前記カム部材１３６に前記駆動源の駆動力を
選択的に伝達する一回転クラッチ３７と、前記バネクラ
ッチ１３５に形成された爪１３５ａと係合して駆動の伝
達を断ち、前記給送回転体を任意の回転角で停止させる
と同時に、前記一回転クラッチ１３７に形成された第１
または第２の爪１３７ａ、１３７ｂと係合して駆動の伝
達を断ち、前記カム部材を所定の回転角において停止さ
せる係合位置と、上記いずれの爪１３５ａ、１３７ａ、
１３７ｂとも係合せず、前記バネクラッチおよび一回転
クラッチ１３５、１３７による駆動の伝達を行わしむる
非係合位置とに移動可能なレバー１３８を有し、非給送
時には前記レバー１３８を係合位置に位置させて前記バ
ネクラッチ１３５の爪１３５ａ及び一回転クラッチ１３
７の第１の爪１３７ａとに係合させて前記給紙ローラ１
３２とシート材とを離間させた状態を保ち、給送時には
前記レバー１３８を非係合位置まで移動させて第１の爪
１３７ａとの係合を解除した後に、第２の爪１３７ｂと
係合させるために係合位置まで移動させ、停止した給送
回転体とシート材とが接触するまで前記カム部材１３６
を回転させ、さらに前記レバー１３８を非係合位置に移
動させ給送回転体が所望の回転角度回転した後に係合位
置に移動させ、レバー１３８を第１の爪１３７ａに係合
させるように構成した給送装置を提案している。In order to eliminate such drawbacks, Japanese Patent Publication No. 2-
No. 62451, a sheet stacking table 102 for stacking sheet materials, a sheet feeding roller 132 for sequentially feeding the sheet materials stacked on the sheet stacking table 102, the sheet feeding roller 132 and the sheet material. 136 for bringing the sheets into or out of contact with each other, and a drive source (main motor) for giving a driving force to the sheet feeding roller 132 and the cam member 136.
And a paper feeding roller 132.
A spring clutch 135 for selectively transmitting the driving force of the driving source, a one-rotation clutch 37 for selectively transmitting the driving force of the driving source to the cam member 136, and a pawl formed on the spring clutch 135. 135a to stop the transmission of drive to stop the feeding rotating body at an arbitrary rotation angle, and at the same time, the first rotation clutch 137 is formed.
Alternatively, the engagement position for engaging the second claws 137a, 137b to cut off the drive transmission, and stopping the cam member at a predetermined rotation angle, and any one of the claws 135a, 137a,
137b is not engaged, and has a lever 138 movable to a non-engagement position where transmission of drive by the spring clutch and the one-rotation clutches 135, 137 is performed. The spring clutch 135 and the one-turn clutch 13
7 and the first claw 137a of the sheet feeding roller 1
32 and the sheet material are kept separated from each other, and at the time of feeding, the lever 138 is moved to the non-engagement position to release the engagement with the first claw 137a, and then the second claw 137b is engaged. The cam member 136 is moved to the engagement position in order to cause the sheet feeding member to come into contact with the stopped feeding rotary member.
Is rotated, and further, the lever 138 is moved to the non-engaging position, the feeding rotating body is rotated to the engaging position after being rotated by a desired rotation angle, and the lever 138 is engaged with the first pawl 137a. We propose a feeding device.
【０００５】[0005]
【発明が解決しようとする課題】かかる従来技術によれ
ば駆動源、即ちメインモ−タの動力によりバネクラッチ
および一回転クラッチ１３５、１３７を介してカム部材
１３６を作動させながら、ソレノイド４４等の制御によ
りシート積載台を給紙ローラから離間させる構成を取っ
ているために、ジャム等によりメインモ−タが強制停止
した場合そのまま前記制御動作が停止してしまう。この
為連続給紙時において給紙ローラがシート材に接触して
いるときにメインモ−タがジャムにより強制停止する
と、シート材が給紙ローラとシート積載台との間に挟持
された状態でジャム状態となるために、ユーザ側で前記
シート材の挟持を解除しながらジャム処理時を行なう必
要があり、ジャム処理が煩雑化する。According to the prior art, the solenoid 44 or the like is controlled while the cam member 136 is actuated via the spring clutch and the one-rotation clutches 135 and 137 by the power of the drive source, that is, the main motor. Therefore, since the sheet stacking base is separated from the sheet feeding roller, if the main motor is forcibly stopped due to a jam or the like, the control operation is stopped as it is. Therefore, if the main motor is forcibly stopped due to a jam when the paper feed roller is in contact with the sheet material during continuous paper feeding, the sheet material is jammed between the paper feed roller and the sheet stacking table. In order to be in the state, it is necessary for the user to perform the jam processing while releasing the sandwiching of the sheet material, and the jam processing becomes complicated.
【０００６】本発明はジャムその他の理由によってモ−
タが停止した場合にも自動的に給紙ローラとシート積載
台の挟持が解除された状態でジャム処理を行なうことの
出来るシート材給送装置を提供することを目的とする。The present invention is designed for jamming and other reasons.
It is an object of the present invention to provide a sheet material feeding device capable of performing jam processing while the nipping between the sheet feeding roller and the sheet stacking table is automatically released even when the sheet feeding is stopped.
【０００７】[0007]
【課題を解決する為の手段】本発明はかかる技術的課題
を達成するために、シート材を積載するシート積載台１
と、該シート積載台１上に積載されたシート材を順次給
送する給紙ローラ２との接離動作をカム部材３により行
なうようにしたシート材給送装置において、シート材搬
送用の給送モ−タの駆動を受けて回転するクラッチ手段
４と、該クラッチ手段４に嵌着させた第一の中継歯車５
と、前記給紙ローラ２とが連設してなる一の軸体６と、
前記第一の中継歯車５の回転を受けて回転する第二の中
継歯車７と、該第二の中継歯車７の反回転方向に所定角
度回転することによりシート積載台１を給紙ローラ２か
ら離間する方向に揺動させるカム部材３とを回転可能に
軸支する第二の軸体８と、前記第二の中継歯車７とカム
部材３間に介装されたしまりバネ９と、前記シート積載
台１が給紙ローラ２側に接触した位置でカム部材３の回
転規制を行なう規制手段１０と、前記カム部材３をシー
ト積載台１が給紙ローラ２より離間する方向に弾性力を
付勢させる弾性手段１９とを具えてなることを特徴とす
るシート材給送装置を提案する。この場合前記第二の中
継歯車７は、軸側にワンウエイクラッチ手段７ａが介装
されたワンウエイ歯車７である事が好ましい。又前記給
送モ−タはシート材搬送用のメインモ−タと共通して用
いることが好ましい。更にカム部材３をシート積載台１
が給紙ローラ２より離間する方向に弾性力を付勢させる
弾性手段１９も前記しまりバネ９と共通して用いること
も可能である。In order to achieve the technical object, the present invention is a sheet stacking base 1 for stacking sheet materials.
In the sheet material feeding device, the cam member 3 performs the contact / separation operation with the sheet feeding roller 2 that sequentially feeds the sheet material stacked on the sheet stacking table 1. Clutch means 4 which is rotated by the drive of the feeding motor, and a first relay gear 5 fitted to the clutch means 4.
And a shaft body 6 in which the paper feed roller 2 is continuously provided,
The second relay gear 7 that rotates in response to the rotation of the first relay gear 5 and the sheet stacking table 1 from the paper feed roller 2 by rotating the second relay gear 7 by a predetermined angle in the counter rotation direction of the second relay gear 7. A second shaft body 8 that rotatably supports a cam member 3 that swings in a separating direction, a tight spring 9 interposed between the second relay gear 7 and the cam member 3, and the seat. A regulating means 10 for regulating the rotation of the cam member 3 at a position where the stacking table 1 contacts the sheet feeding roller 2 side, and an elastic force is applied to the cam member 3 in a direction in which the sheet stacking table 1 is separated from the sheet feeding roller 2. A sheet material feeding device is proposed, which comprises elastic means 19 for urging. In this case, it is preferable that the second relay gear 7 is a one-way gear 7 having a one-way clutch means 7a on the shaft side. Further, it is preferable that the feeding motor is used in common with the main motor for conveying the sheet material. Further, the cam member 3 is attached to the sheet stacking table 1
It is also possible to use the elastic means 19 for urging the elastic force in the direction away from the sheet feeding roller 2 in common with the tightening spring 9.
【０００８】[0008]
【作用】かかる技術手段によれば、先ずプリント若しく
は複写開始信号によりクラッチ手段４がＯＦＦ状態で給
送モ−タが回転すると、該クラッチ手段４に嵌着された
第一の中継歯車５及び第二の中継歯車７が回転する。こ
の時第二の中継歯車７及びカム部材３は第二の軸体８に
回転可能に軸支されており、且つ両者間には予め緩めら
れたコイルスプリングが介装されており、従って前記カ
ム部材３は第二の中継歯車７の回転を受けて回転し、前
記シート積載台１が給紙ローラ２側に圧接した時点で規
制手段１０によりカム部材３の回転規制が行なわれる。According to this technical means, first, when the feeding motor is rotated with the clutch means 4 in the OFF state by the print or copy start signal, the first relay gear 5 and the first relay gear 5 fitted in the clutch means 4 are rotated. The second relay gear 7 rotates. At this time, the second relay gear 7 and the cam member 3 are rotatably supported by the second shaft body 8, and a coil spring which has been loosened in advance is interposed between the second relay body 7 and the cam member 3. The member 3 rotates in response to the rotation of the second relay gear 7, and the rotation of the cam member 3 is restricted by the restricting means 10 when the sheet stacking base 1 comes into pressure contact with the sheet feeding roller 2 side.
【０００９】その後第二の中継歯車７は更に回転を継続
しながらしまりバネ９を締まり方向に回転を継続させ、
所定量締められた時点でしまりバネ９の締まり回転が停
止し、第二の中継歯車７がしまりバネ９軸端面を摺動し
ながら空回りする。この際前記第二の中継歯車７を軸側
にワンウエイクラッチ手段７ａが介装されたワンウエイ
歯車７で構成することによりしまりバネ９が緩み方向に
回動する際に中継歯車としまりバネ９軸端面間で摺動抵
抗が発生することなく、好ましい。この時点でクラッチ
手段４をＯＮさせる事によりクラッチ手段４と第一の軸
体６間が連結し、給送モ−タの回転力が給紙ローラ２に
伝達され、該給紙ローラ２はシート積載台１に接触状態
にあるために、円滑な給送が行なわれる。After that, the second relay gear 7 continues to rotate, and the tightening spring 9 continues to rotate in the tightening direction.
When the tightening spring 9 is tightened by a predetermined amount, the tightening rotation of the tightening spring 9 stops, and the second relay gear 7 idles while sliding on the shaft end surface of the tightening spring 9. At this time, by constructing the second relay gear 7 by a one-way gear 7 having a one-way clutch means 7a on the shaft side, when the tightening spring 9 rotates in the loosening direction, the relay gear and the tightening spring 9 have an axial end surface. It is preferable because sliding resistance does not occur between them. At this time, by turning on the clutch means 4, the clutch means 4 and the first shaft body 6 are connected to each other, the rotational force of the feeding motor is transmitted to the sheet feeding roller 2, and the sheet feeding roller 2 is moved. Since the loading table 1 is in contact with the loading table 1, smooth feeding is performed.
【００１０】そしてジャムその他の理由により前記給送
モ−タが停止すると、しまりバネ９の緩み方向に生じる
バネ力及び弾性手段１９の弾性力（両者は共通させるこ
とが可能である）によりカム部材３が、シート積載台１
を給紙ローラ２より離間する方向に回転する。When the feeding motor is stopped due to a jam or other reasons, the cam member is caused by the spring force generated in the loosening direction of the tightening spring 9 and the elastic force of the elastic means 19 (both can be made common). 3 is the sheet stacking table 1
Is rotated in a direction away from the paper feed roller 2.
【００１１】従ってかかる発明によれば、一枚給紙毎に
給紙ローラ２とシート積載台１間の接離動作を行ない、
これによりジャムその他の理由によってモ−タが停止し
た場合にも自動的に給紙ローラ２とシート積載台１間が
離間して容易に且つ確実にジャム処理を行なうことが出
来る。Therefore, according to the present invention, the contacting / separating operation between the sheet feeding roller 2 and the sheet stacking table 1 is performed for each sheet feeding.
As a result, even when the motor is stopped due to a jam or other reasons, the paper feed roller 2 and the sheet stacking base 1 are automatically separated from each other, and the jam can be easily and surely processed.
【００１２】[0012]
【実施例】以下、図面に基づいて本発明の実施例を例示
的に詳しく説明する。但しこの実施例に記載されている
構成部品の寸法、材質、形状、その相対配置などは特に
特定的な記載がない限りは、この発明の範囲をそれのみ
に限定する趣旨ではなく単なる説明例に過ぎない。図１
は本発明の実施例にかかる給送機構を示し、該給紙機構
は給紙台１の画像形成領域から外れた区域に配設されて
いる。Embodiments of the present invention will now be illustratively described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative positions and the like of the components described in this embodiment are not intended to limit the scope of the present invention thereto, but are merely examples, unless otherwise specified. Not too much. Figure 1
Shows a sheet feeding mechanism according to the embodiment of the present invention, and the sheet feeding mechanism is arranged in an area of the sheet feeding table 1 which is out of the image forming area.
【００１３】その構成を詳細に説明するに、１は前記記
録紙搬送路上に配した感光体ドラムや転写ローラその他
のローラ部材を駆動させるための搬送モ−タ（不図示）
に歯車列２０を介して歯合している電磁クラッチ４で、
外周側に前記歯車列２０と歯合する軸歯車４１、該クラ
ッチ４の胴部に嵌着させた第一の中継歯車５を具え、該
クラッチ４は一の軸体６を介して前記給紙ローラ２と連
設し、前記クラッチ４のＯＮ動作により一の軸体６を介
して給紙ローラ２とクラッチ４が連結可能に構成する。To explain the structure in detail, reference numeral 1 is a conveying motor (not shown) for driving a photosensitive drum, a transfer roller and other roller members arranged on the recording sheet conveying path.
With the electromagnetic clutch 4 that is meshed with the gear train 20,
A shaft gear 41 meshing with the gear train 20 and a first relay gear 5 fitted on the body of the clutch 4 are provided on the outer peripheral side, and the clutch 4 feeds the paper through one shaft body 6. The feed roller 2 and the clutch 4 are arranged so as to be connected to the roller 2, and the feed roller 2 and the clutch 4 can be connected via one shaft body 6 by the ON operation of the clutch 4.
【００１４】一方前記一の軸体６と平行に第二の軸体８
が配設されており、該軸体８に前記第一の中継歯車５に
歯合され軸側にワンウエイベアリング７ａが介装された
ワンウエイ歯車７と、該ワンウエイ歯車７の反回転方向
（空回り方向）に所定角度回転することにより給紙台１
を給紙ローラ２から離間する方向に揺動させるカム部材
３とが軸支されている。そして該ワンウエイ歯車７とカ
ム部材３間には、図３に示すようにワンウエイ歯車７の
回転方向に締る方向に配設されたしまりバネ９が介装さ
れている。On the other hand, a second shaft body 8 is provided in parallel with the first shaft body 6.
A one-way gear 7 in which the shaft body 8 is meshed with the first relay gear 5 and a one-way bearing 7a is interposed on the shaft side; ) Is rotated by a predetermined angle to feed sheet 1
A cam member 3 for swinging the sheet feeding roller 2 in a direction away from the sheet feeding roller 2 is pivotally supported. A tightening spring 9 is disposed between the one-way gear 7 and the cam member 3 so as to be tightened in the rotational direction of the one-way gear 7, as shown in FIG.
【００１５】そして前記軸体８は軸を中心として略９０
°の円弧状に形成されており、その周面に給紙台１と連
設した受け台２５が配設されている。受け台２５は略Ｌ
字状をなし、その先端自由端側を上方に向け９０°折曲
し、カム部材３の回動規制を行なう。又前記軸体８を挟
んで前記受け台２５の上方位置にはストッパピン１０が
配設されており、該ストッパピン１０により前記カム部
材３が回動し、その周面が受け台２５周面より離れ、給
紙台１が給紙ローラ２側に接触した位置でカム部材３の
回転規制を行なうよに構成している。The shaft body 8 is approximately 90 degrees centering on the shaft.
It is formed in a circular arc shape of 0 °, and a receiving table 25 that is continuous with the paper feeding table 1 is arranged on the peripheral surface thereof. Cradle 25 is approximately L
The cam member 3 is formed into a character shape, and the free end side of the tip is bent upward by 90 ° to regulate the rotation of the cam member 3. A stopper pin 10 is disposed above the pedestal 25 with the shaft 8 interposed therebetween, and the cam pin 3 is rotated by the stopper pin 10 so that the peripheral surface thereof is the peripheral surface of the pedestal 25. The rotation of the cam member 3 is regulated at a position further away from the paper feed table 1 to contact the paper feed roller 2 side.
【００１６】そして前記カム部材３には、図２に示すよ
うに給紙台１が給紙ローラ２より離間する方向に弾性力
を付勢させる引張バネ１９が取り付けられ、該引張バネ
の一端は給紙台１側に連設する。As shown in FIG. 2, a tension spring 19 is attached to the cam member 3 for urging an elastic force in the direction in which the paper feed tray 1 is separated from the paper feed roller 2. One end of the tension spring is attached to the cam spring 3. It is connected to the paper feed table 1 side.
【００１７】かかる実施例によれば、先ず初期状態は電
磁クラッチ４がＯＦＦ状態で且つカム部材３は図３の状
態にあり、従って図２（Ａ）に示すように給紙台１は給
紙ローラ２より離間状態にある。この状態からプリント
開始信号により搬送モ−タが回転すると不図示の感光体
ドラムや定着ローラが予備的回転を行なうとともに、歯
車列２０及び軸歯車４１を介して電磁クラッチ４の胴部
に嵌着された第一の中継歯車５及び該中継歯車５の回転
を受けてワンウエイ歯車７が回転する。According to such an embodiment, first, the electromagnetic clutch 4 is in the OFF state and the cam member 3 is in the state shown in FIG. 3 in the initial state. Therefore, as shown in FIG. It is separated from the roller 2. When the transport motor is rotated in this state by the print start signal, the photosensitive drum and the fixing roller (not shown) are preliminarily rotated, and are fitted on the body of the electromagnetic clutch 4 via the gear train 20 and the shaft gear 41. The one-way gear 7 rotates in response to the rotation of the first relay gear 5 and the rotation of the relay gear 5.
【００１８】この時ワンウエイ歯車７及びカム部材３は
第二の軸体８に回転可能に軸支されており、且つ両者間
には予め緩められたしまりバネ９が介装されており、従
って前記カム部材３はワンウエイ歯車７の回転を受けて
回転し、図２（Ｂ）に示すように前記給紙台１が給紙ロ
ーラ２側に接触した位置でストッパピン１０によりカム
部材３の回転規制が行なわれる。At this time, the one-way gear 7 and the cam member 3 are rotatably supported by the second shaft body 8, and a loosened tightening spring 9 is interposed between the two, so that The cam member 3 is rotated by the rotation of the one-way gear 7, and the rotation of the cam member 3 is regulated by the stopper pin 10 at the position where the paper feed tray 1 contacts the paper feed roller 2 side as shown in FIG. 2B. Is performed.
【００１９】その後ワンウエイ歯車７は更に回転を継続
しながらしまりバネ９を締まり方向に回転を継続させ、
所定量締められた時点でしまりバネ９の締まり回転が停
止し、ワンウエイ歯車７がしまりバネ９軸端面を摺動し
ながら空回りする。この時点で電磁クラッチ４をＯＮさ
せる事により電磁クラッチ４と第一の軸体６間が連結
し、搬送モ−タの回転力が給紙ローラ２に伝達され、該
給紙ローラ２は給紙台１に接触状態にあるために、自動
的に給送が行なわれる。After that, the one-way gear 7 continues to rotate, and the tightening spring 9 continues to rotate in the tightening direction.
When the tightening spring 9 is tightened by a predetermined amount, the tightening rotation of the tightening spring 9 is stopped, and the one-way gear 7 idles while sliding on the shaft end surface of the tightening spring 9. At this time, by turning on the electromagnetic clutch 4, the electromagnetic clutch 4 and the first shaft body 6 are connected, the rotational force of the conveyance motor is transmitted to the paper feed roller 2, and the paper feed roller 2 feeds paper. Since the table 1 is in contact with the table 1, the sheet is automatically fed.
【００２０】そしてジャムその他の理由により前記搬送
モ−タが停止すると、しまりバネ９の緩み方向に生じる
バネ力及び引張バネの弾性力によりカム部材３が復帰方
向に回転し、受け台２５を押圧下降させながら給紙台１
を給紙ローラ２より離間させる。従って本実施例によれ
ば前記給送動作中はカム部材３は常に図２（Ｂ）の位置
にあり、且つしまりバネ９が締り方向に位置しているた
めに、ジャムにより搬送モ−タが停止しても自動的に給
紙ローラ２と給紙台１間が離間して容易に且つ確実にジ
ャム処理を行なうことが出来る。When the conveying motor is stopped due to a jam or other reasons, the cam member 3 is rotated in the returning direction by the spring force generated in the loosening direction of the tightening spring 9 and the elastic force of the tension spring, and the pedestal 25 is pressed. Feeding table 1 while descending
Are separated from the paper feed roller 2. Therefore, according to this embodiment, since the cam member 3 is always in the position shown in FIG. 2B during the feeding operation and the tightening spring 9 is positioned in the tightening direction, the conveyance motor is jammed. Even if the paper feed is stopped, the paper feed roller 2 and the paper feed tray 1 are automatically separated from each other, and the jam processing can be performed easily and reliably.
【００２１】[0021]
【効果】以上記載のごとく本発明によれば、ジャムその
他の理由によってモ−タが停止した場合にも自動的に給
紙ローラとシート積載台の挟持が解除された状態でジャ
ム処理を行なうことの出来る。等の種々の著効を有す。As described above, according to the present invention, even when the motor is stopped due to a jam or other reasons, the jam processing is automatically performed with the nipping between the sheet feeding roller and the sheet stacking table released. You can It has various remarkable effects.
【図１】本発明の給送機構を示す要部斜視図である。FIG. 1 is a perspective view of essential parts showing a feeding mechanism of the present invention.
【図２】（Ａ）は給紙台が給紙ローラから離間した位置
におけるカム部材の配置図を示す。（Ｂ）は給紙台が給
紙ローラ側に接触した位置におけるカム部材の配置図を
示す。FIG. 2A is a layout view of a cam member at a position where a paper feed tray is separated from a paper feed roller. (B) shows a layout of the cam members at the position where the paper feed table contacts the paper feed roller side.
【図３】ワンウエイ歯車、カム部材及びしまりバネの介
装状態を示す。FIG. 3 shows a state in which a one-way gear, a cam member and a tight spring are interposed.
１ シート積載台 ２ 給紙ローラ ３ カム部材 ４ クラッチ手段 ５ 第一の中継歯車 ６ 一の軸体 ７ 第二の中継歯車 ８ 第二の軸体 ９ しまりバネ １０ 規制手段 １９ 弾性手段 1 Sheet Stacking Table 2 Paper Feed Roller 3 Cam Member 4 Clutch Means 5 First Relay Gear 6 One Shaft 7 Second Relay Gear 8 Second Shaft 9 Narrow Spring 10 Regulation Means 19 Elastic Means
Claims (2)
シート積載台上に積載されたシート材を順次給送する給
紙ローラとの接離動作をカム部材により行なうようにし
たシート材給送装置において、 シート材搬送用の給送モ−タの駆動を受けて回転するク
ラッチ手段と、該クラッチ手段に嵌着させた第一の中継
歯車と、前記給紙ローラとが連設してなる一の軸体と、 前記第一の中継歯車の回転を受けて回転する第二の中継
歯車と、該第二の中継歯車の反回転方向に所定角度回転
することによりシート積載台を給紙ローラから離間する
方向に揺動させるカム部材とを回転可能に軸支する第二
の軸体と、 前記第二の中継歯車とカム部材間に介装されたしまりバ
ネと、 前記シート積載台が給紙ローラ側に接触した位置でカム
部材の回転規制を行なう規制手段と、 前記カム部材をシート積載台が給紙ローラより離間する
方向に弾性力を付勢させる引張バネとを具えてなること
を特徴とするシート材給送装置1. A sheet material feeding device in which a cam member performs a contact / separation operation between a sheet loading table for loading sheet materials and a sheet feeding roller for sequentially feeding the sheet materials loaded on the sheet loading table. In the feeding device, a clutch means that is rotated by being driven by a feeding motor for conveying a sheet material, a first relay gear fitted in the clutch means, and the paper feed roller are connected in series. A shaft body, a second relay gear that rotates by receiving rotation of the first relay gear, and a sheet stacking table that is rotated by a predetermined angle in the counter-rotational direction of the second relay gear. A second shaft body that rotatably supports a cam member that swings in a direction away from the roller, a tight spring interposed between the second relay gear and the cam member, and the sheet stacking base. Restrict the rotation of the cam member at the position where it contacts the paper feed roller side. And restricting means, said cam member sheet feeding apparatus sheet stacking plate is characterized by comprising comprises a tension spring for biasing the elastic force in a direction away from the paper feed roller
イクラッチ手段が介装されたワンウエイ歯車である請求
項１記載のシート材給送装置2. The sheet material feeding device according to claim 1, wherein the second relay gear is a one-way gear in which a one-way clutch means is interposed on the shaft side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5186685A JP3040640B2 (en) | 1993-06-30 | 1993-06-30 | Sheet material feeding device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5186685A JP3040640B2 (en) | 1993-06-30 | 1993-06-30 | Sheet material feeding device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0717643A true JPH0717643A (en) | 1995-01-20 |
| JP3040640B2 JP3040640B2 (en) | 2000-05-15 |
Family
ID=16192852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5186685A Expired - Fee Related JP3040640B2 (en) | 1993-06-30 | 1993-06-30 | Sheet material feeding device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3040640B2 (en) |
-
1993
- 1993-06-30 JP JP5186685A patent/JP3040640B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3040640B2 (en) | 2000-05-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4717139A (en) | Sheet feeding apparatus | |
| EP0314167B1 (en) | Paper feeder | |
| JPH0475928A (en) | Sheet feeder | |
| JPH08225167A (en) | Sheet feeder and image forming device | |
| JPH0717643A (en) | Sheet material feeder | |
| JP3652295B2 (en) | Sheet feeding apparatus, image forming apparatus including the same, and image reading apparatus | |
| JP2808277B2 (en) | Recording device | |
| JP3463905B2 (en) | Paper feeder | |
| JP3860767B2 (en) | Paper feeding device and image forming apparatus | |
| JPH0577951A (en) | Paper feeder | |
| JPH033591B2 (en) | ||
| JPH0663551B2 (en) | Drive device for automatic document feeder | |
| JPS61111239A (en) | Paper feeding device | |
| JPH01192631A (en) | Sheet feeding device | |
| JP2627184B2 (en) | Paper feeder | |
| JP2924309B2 (en) | Sheet material feeding device | |
| JP2002332130A (en) | Sheet material feeding device, method for feeding sheet material, and recording device | |
| JPS59102736A (en) | Separated sheets feeder device | |
| JP2002104678A (en) | Sheet feeder and recording device | |
| JPH0114595Y2 (en) | ||
| JPH0229028B2 (en) | ||
| JP2002029639A (en) | Sheet feeder | |
| JPH048425Y2 (en) | ||
| JPH07109041A (en) | Paper feeder | |
| JPH05294484A (en) | Sheet feeder and image former |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |