JPH04140247A - Sheet carrier device - Google Patents
Sheet carrier deviceInfo
- Publication number
- JPH04140247A JPH04140247A JP26166790A JP26166790A JPH04140247A JP H04140247 A JPH04140247 A JP H04140247A JP 26166790 A JP26166790 A JP 26166790A JP 26166790 A JP26166790 A JP 26166790A JP H04140247 A JPH04140247 A JP H04140247A
- Authority
- JP
- Japan
- Prior art keywords
- paper
- roller
- rollers
- recording
- epdm
- 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
Links
- 239000000463 material Substances 0.000 claims abstract description 14
- 239000002783 friction material Substances 0.000 claims description 4
- 229920002943 EPDM rubber Polymers 0.000 abstract description 17
- 229920001296 polysiloxane Polymers 0.000 abstract description 8
- 238000004383 yellowing Methods 0.000 abstract description 6
- 230000032258 transport Effects 0.000 description 25
- 239000011248 coating agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 7
- 238000001514 detection method Methods 0.000 description 7
- 238000000034 method Methods 0.000 description 6
- 238000007639 printing Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 229910052710 silicon Inorganic materials 0.000 description 4
- 239000010703 silicon Substances 0.000 description 4
- 210000000078 claw Anatomy 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 3
- 239000004014 plasticizer Substances 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 238000009835 boiling Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000002845 discoloration Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 239000004447 silicone coating Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Delivering By Means Of Belts And Rollers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は記録装置等に用いられるシート搬送装置に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a sheet conveying device used in a recording device or the like.
従来、記録装置のシート搬送装置は第９図のように構成
されてい゛る。ｌは紙カセット５０に積載された記録紙
で給紙ローラ２により記録紙１の最上部の１枚１ａだけ
分離されて、給紙上下ガイド３．４間に送られ、駆動モ
ーターの駆動により回転する搬送下ローラ５とこの搬送
下ローラ５により従動的に回転する搬送上ローラ６との
間に送られ狭まれる。Conventionally, a sheet conveying device of a recording apparatus is constructed as shown in FIG. 1 is the recording paper stacked in the paper cassette 50, and the topmost sheet 1a of the recording paper 1 is separated by the paper feed roller 2 and sent between the upper and lower paper feed guides 3 and 4, and rotated by the drive motor. The paper is sent between the lower conveyance roller 5 and the upper conveyance roller 6, which is rotated by the lower conveyance roller 5.
次いて記録紙１ａは更に搬送上下ローラ５．６により引
張りローラ７に導かれ、記録紙１ａ先端が引張りローラ
７に挟み込まれると一旦停止する。この状態において記
録ヘッド１０がレール７に沿って、第３図の手前側から
奥側に移動しながら記録紙１ａに一定幅記録を行う。−
行の記録が終了する毎に搬送上下ローラ５．６により記
録紙１ａが記録幅と同量送り出され、次の行の記録を行
う。以上の動作を繰り返し、記録紙１ａの１枚分の記録
が終了すると排紙トレイ９に排出される。この様に一定
幅の記録を順次繰り返す記録方式では各行の記録のつな
ぎ部での記録ズレを防止するため高精度の紙搬送が必要
で有る。このため搬送下ローラ５は、外径精度が高く、
紙との摩擦係数を高くした鋼材のローラの表面をズラス
ト処理したローラが用いられ搬送上ローラ６は搬送下ロ
ーラ５による搬送を確実にするためニップ幅が広く取れ
るゴム（例えばＥＰＤＭ等）等の弾性ローラで構成され
ている。Next, the recording paper 1a is further guided to the tension roller 7 by the conveying upper and lower rollers 5.6, and once the leading edge of the recording paper 1a is caught by the tension roller 7, it is temporarily stopped. In this state, the recording head 10 moves along the rail 7 from the front side to the rear side in FIG. 3 while recording a constant width on the recording paper 1a. −
Each time recording of a line is completed, the recording paper 1a is fed out by the upper and lower transport rollers 5.6 by an amount equal to the recording width, and the next line is recorded. The above operations are repeated until the recording of one sheet of recording paper 1a is completed and the recording paper is discharged to the paper discharge tray 9. In this type of printing method in which printing of a constant width is repeated sequentially, highly accurate paper transport is required to prevent printing deviations at the joints between the printing of each row. Therefore, the lower conveyance roller 5 has high outer diameter accuracy,
A roller made of steel with a high coefficient of friction with the paper and the surface of which has been subjected to a slip treatment is used.The upper conveyance roller 6 is made of rubber (for example, EPDM, etc.) that allows a wide nip width to ensure conveyance by the lower conveyance roller 5. Consists of elastic rollers.
この様に構成された記録装置の紙搬送機構に於いて給紙
ローラ２から送られた紙１ａの斜行を除去する方法とし
て、第１０図に示す様に給紙ローラ２から紙を送り出す
時、搬送上下ローラ５．６を紙の進行方向に対して逆回
転させ、給紙ローラ２と搬送上下ローラ５．６との間に
紙１ａのループをつくり搬送上下ローラ５．６のニップ
に紙先端をなられす事で斜行を除去した後、搬送上下ロ
ーラ５．６を紙進行方向に回転させ、記録部に紙１ａを
送り出す。As a method for removing the skew of the paper 1a fed from the paper feed roller 2 in the paper conveyance mechanism of the recording apparatus configured in this way, when the paper is fed from the paper feed roller 2 as shown in FIG. , the upper and lower conveyance rollers 5.6 are rotated in the opposite direction to the direction in which the paper travels, creating a loop of the paper 1a between the paper feed roller 2 and the upper and lower conveyance rollers 5.6, and the paper is placed in the nip of the upper and lower conveyance rollers 5.6. After eliminating skew by smoothing the leading edge, the upper and lower transport rollers 5.6 are rotated in the paper advancing direction to send the paper 1a to the recording section.
しかしながら、上記従来例では搬送下ローラ５は紙との
摩擦力を確保するため摩擦係数が高くなる様に処理され
、又、搬送上ローラ６はニップ幅を広（するためにＥＰ
ＤＭ等の弾性ローラて構成されている。通常、ＥＰＤＭ
等の弾性ローラは複写装置の紙送り部に使用されている
様に紙との摩擦係数は高い方に属している。このため前
述した紙の斜行防止として紙の進行方向に対して逆転し
ている搬送上下ローラ５．６に紙を送り入れる時に紙先
端がニップになられず、搬送上下ローラ５．６の回転方
向にめくれてしまうという欠点があった。However, in the above conventional example, the lower conveyance roller 5 is treated to have a high friction coefficient to ensure frictional force with the paper, and the upper conveyance roller 6 is treated to have a wide nip width (EP
It is composed of an elastic roller such as DM. Usually EPDM
Elastic rollers such as those used in the paper feeding section of copying machines have a high coefficient of friction with paper. For this reason, when the paper is fed into the upper and lower transport rollers 5.6, which are rotated in the opposite direction with respect to the paper traveling direction, the leading edge of the paper does not become a nip, and the rotation direction of the upper and lower transport rollers 5.6 prevents the paper from being skewed. It had the disadvantage that it could be turned over.
又、搬送上ローラ６の摩擦係数が大きいと高精度の紙搬
送をするための搬送下ローラ５の搬送力に対して抵抗と
なり、紙の安定した高精度送りに障害となる欠点も有る
。Further, if the friction coefficient of the upper conveyance roller 6 is large, it becomes resistant to the conveyance force of the lower conveyance roller 5 for conveying the paper with high precision, which also has the drawback of impeding stable and high precision feeding of the paper.
又、インクンエツト方式の記録手段では記録品位ヲ高め
るためインクのにじみ等を制御するため表面にコート材
を塗布した記録紙が用いられることがあるが、コート材
によっては、ＥＰＤＭ等のゴムローラに貼り付いてしま
い搬送不可能となる欠点も有った。In addition, inkjet recording methods sometimes use recording paper whose surface is coated with a coating material to control ink smearing to improve recording quality, but depending on the coating material, it may stick to rubber rollers such as EPDM. It also had the disadvantage that it became impossible to transport.
又、ＥＰＤＭ等のゴムローラては可塑剤が含まれている
がこの可塑剤と前述したコート材が反応し記録紙の黄変
が発生する欠点も有った。Further, rubber rollers such as EPDM contain a plasticizer, but this plasticizer reacts with the above-mentioned coating material, resulting in yellowing of the recording paper.
〔課題を解決するための手段（及び作用）〕本発明は前
述の搬送上下ローラによる紙先端のめくれを防止し、ま
た紙の送り精度を安定させ、コート剤を使用する記録に
対してローラへの貼付きや、黄変も防止することを目的
とする。[Means for Solving the Problems (and Effects)] The present invention prevents the leading edge of the paper from being turned over by the above-mentioned upper and lower transport rollers, stabilizes the paper feeding accuracy, and improves the stability of the rollers for recording using a coating agent. The purpose is to prevent sticking and yellowing.
上記目的を達成する本発明の構成は、表面を低摩擦材料
でコートした弾性部材で形成された第１のローラと、前
記第１のローラよりも剛性の高い材料で形成され、前記
第１のローラと協働してシートを挾持して搬送する第２
のローラと、を有することを特徴とするシート搬送装置
である。The structure of the present invention that achieves the above object includes a first roller formed of an elastic member whose surface is coated with a low-friction material, and a material having higher rigidity than the first roller; The second part works with the rollers to grip and convey the sheet.
A sheet conveying device characterized in that it has a roller.
第１図は本発明の第１の実施例で基本的な構成、動作は
従来例と同じであるが、弾性ローうて有る搬送上ローラ
６は第２図に示す様に芯金６ａ、 ＥＰＤＭ６ｂ。FIG. 1 shows a first embodiment of the present invention, the basic configuration and operation of which are the same as those of the conventional example, except that the upper conveying roller 6 with elastic rows has a core bar 6a and an EPDM 6b as shown in FIG. .
シリコンコート６ｃから構成され、従来例のローラに対
しシリコンコート６ｃが付加されている。シリコンコー
ト６ｃは厚さ１５μ程度で有りＥＰＤＭの弾性にはほと
んど影響をあたえず、弾性ローラとしての機能は十分に
確保されている。It is composed of a silicone coat 6c, and the silicone coat 6c is added to the conventional roller. The silicon coat 6c has a thickness of about 15 μm and has almost no effect on the elasticity of the EPDM, so that its function as an elastic roller is sufficiently ensured.
又、実験値によるとソリコンコートの紙との摩擦係数は
約０．２でＥＰＤＭの同摩擦係数約１．０、ブラスト処
理された搬送下ローラ５の同摩擦係数約０５で有りＥＰ
ＤＭより十分に小さく、かつブラスト処理された搬送ロ
ーラよりも小さくなっている。Also, according to experimental values, the coefficient of friction between Soricon coated paper and paper is approximately 0.2, that of EPDM is approximately 1.0, and that of the blasted lower transport roller 5 is approximately 0.5.
It is sufficiently smaller than the DM and also smaller than the blast-treated conveyance roller.
この様に、搬送上ローラ６の表層に７リコンコート６Ｃ
を設けることで搬送上ローラ６と紙との摩擦係数を小さ
くでき搬送下ローラ５による紙の高精度搬送に対する負
荷抵抗を十分に小さくてき、安定した高精度搬送が可能
になった。In this way, the surface layer of the upper conveyance roller 6 is coated with 7 recon coats 6C.
By providing this, the coefficient of friction between the upper conveyance roller 6 and the paper can be reduced, and the load resistance to the high-precision conveyance of the paper by the lower conveyance roller 5 can be sufficiently reduced, making stable and high-precision conveyance possible.
又、シリコンコートの表面は前述した様に摩擦係数が小
さく滑らかで有り、又、ＥＰＤＭ等にみられるベタ付き
が無いため、記録紙の貼り付きを防止できる。Furthermore, as mentioned above, the surface of the silicone coat is smooth with a small coefficient of friction, and there is no stickiness seen in EPDM, etc., so it is possible to prevent the recording paper from sticking.
又、記録紙のコート材とＥＰＤＭが直接接触する事が無
いためコート材を塗布された記録紙の黄変等の変色を防
止できる。Furthermore, since the coating material of the recording paper and EPDM do not come into direct contact, discoloration such as yellowing of the recording paper coated with the coating material can be prevented.
表 １
インクンエツト用コート紙のロ
ラ貼り付き
○貼付き無し
△貼付きぎみ
×完全に貼付き
次に第３図、第４図を用いて紙の斜行除去方法について
述へる。基本構成は第１の実施例と同じて搬送上ローラ
６はＥＰＤＭの表層にシリコンコートが付加されている
。Table 1 Roller sticking of coated paper for inkjet ○ No sticking △ Slightly sticking × Completely sticking Next, a method for removing skewed paper will be described using FIGS. 3 and 4. The basic structure is the same as in the first embodiment, and the upper transport roller 6 has a silicone coat added to the surface layer of EPDM.
駆動系は、第４図に示す構成で駆動モーター１１の片側
出力軸にプーリー１２が設けられ搬送下ローラ５に取付
けられているプーリー１４との間はタイミングベルト１
３て連結されている。搬送下ローラ５の回転精度を上げ
るため駆動モーター１１は回転角度を制御できるステッ
ピングモーターが用いられ、プーリー１２．１４は各軸
に対してガタ付きの無い様に固定されている。又駆動モ
ーターの反対側出力軸にはギア１５が設けられ、給紙ロ
ーラ２の軸２ａに設けられたハネクラッチ１６のギア＋
６ａと噛み合っている。１７はハネクラッチ１６の駆動
を制御するソレノイドである。この様な構成で駆動モー
ター１１を第４図ａ方向に回転させると、給紙ローラ２
は紙をカセット５０から送り出す方向に又搬送下ローラ
５は紙の進行方向とは逆方向に回転する。しかし、バネ
クラッチ１６ａ、爪部１６ｂがソレノイドの爪部１７ａ
に掛った状態で給紙ローラ２の回転は停止し、第３図（
ｆ）の給紙開始状態になる。The drive system has a configuration shown in FIG. 4, and a pulley 12 is provided on one output shaft of a drive motor 11, and a timing belt 1 is connected between the pulley 12 and the pulley 14 attached to the lower transport roller 5.
3 are connected. In order to increase the rotation accuracy of the lower transport roller 5, a stepping motor whose rotation angle can be controlled is used as the drive motor 11, and the pulleys 12 and 14 are fixed to each axis so as not to play. A gear 15 is provided on the output shaft on the opposite side of the drive motor, and a gear 15 is provided on the output shaft on the opposite side of the drive motor.
It meshes with 6a. A solenoid 17 controls the drive of the spring clutch 16. When the drive motor 11 is rotated in the direction a in FIG. 4 with this configuration, the paper feed roller 2
rotates in the direction in which the paper is sent out from the cassette 50, and the lower transport roller 5 rotates in the opposite direction to the direction in which the paper travels. However, the spring clutch 16a and the claw portion 16b are solenoid claw portions 17a.
The rotation of the paper feed roller 2 stops when the paper feed roller 2 is caught in the state shown in Figure 3 (
The paper feeding start state of f) is reached.
ここで、ソレノイド１７をＯＮさせソレノイドの爪部１
０ａのバネクラッチ爪部１６ｂの掛りを解除すると、駆
動モーター１１の駆動がバネクラッチ１６を介して給紙
ローラ２に伝わり回転を始め、カセット５０から最上部
の紙１ａを送り出す（第３図（ａ））。Here, the solenoid 17 is turned on and the claw portion 1 of the solenoid is turned on.
When the spring clutch pawl 16b of 0a is released, the drive of the drive motor 11 is transmitted to the paper feed roller 2 via the spring clutch 16, and it begins to rotate, feeding out the uppermost paper 1a from the cassette 50 (see Fig. 3). a)).
給紙ローラ２により送り出された紙１ａの先端は搬送上
ローラ６に当たり（第３図（ｂ））、さらに紙１ａ先端
が搬送上下ローラ５．６のニップ部に入り、搬送上下ロ
ーラ５．６と給紙ローラ２の間にループをつくった状態
で駆動モーター１１の回転を停止する（第３図（Ｃ））
。この状態で紙のループにより紙先端は搬送上下ローラ
のニップ部に押し付けられ、斜行が笑止される。又給紙
ローラ２とカセット５０の中板５０ａの加圧により、紙
は挾持され、ループは保持されている。次に駆動モータ
ーを第４図のｂ方向に回転させると、搬送下ローラ５は
紙の進行方向に回転し紙１ａを記録部に搬送する。この
時、給紙ローラ２はバネクラッチのギア１６ａがハネの
ゆるみ方向に回転し、かつ、カセット中板５０ａの圧が
給紙ローラ２にかかっているため回転する事なく停止し
ている（第３図（ｄ））。さらに、第３図（ｃ）での紙
のループが無くなると、給紙ローラ２は紙１ａにより引
っ張られカセット中板５０ａの圧が加わらなくなるまで
回転をする（第３図（ｅ））。記録が終了し紙を排出し
た後又は再度給紙を開始する時に、駆動モーターを第６
図ａの方向に回転させると、給紙開始状態になる（第３
図（ｆ））。The leading edge of the paper 1a sent out by the paper feed roller 2 hits the upper conveying roller 6 (FIG. 3(b)), and then the leading edge of the paper 1a enters the nip of the upper and lower conveying rollers 5.6, and the upper conveying roller 5.6 The rotation of the drive motor 11 is stopped with a loop formed between the paper feed roller 2 and the paper feed roller 2 (Fig. 3 (C)).
. In this state, the leading edge of the paper is pressed against the nip between the upper and lower transport rollers by the paper loop, and skewing is prevented. Further, the paper is held between the paper feed roller 2 and the middle plate 50a of the cassette 50, and the loop is maintained. Next, when the drive motor is rotated in the direction b in FIG. 4, the lower transport roller 5 rotates in the direction in which the paper travels and transports the paper 1a to the recording section. At this time, the paper feed roller 2 does not rotate and is stopped because the gear 16a of the spring clutch rotates in the direction of loosening the springs, and the pressure of the cassette middle plate 50a is applied to the paper feed roller 2. Figure 3(d)). Furthermore, when the paper loop in FIG. 3(c) disappears, the paper feed roller 2 is pulled by the paper 1a and rotates until the pressure of the cassette middle plate 50a is no longer applied (FIG. 3(e)). After recording is finished and the paper is ejected, or when starting paper feeding again, the drive motor is
When rotated in the direction shown in figure a, the paper feed starts state (third
Figure (f)).
ここで給紙上ガイド４、給紙下ガイド３の形状をカセッ
ト５０から送り出された紙１ａの先端が搬送上ローラ６
に当たり、搬送上ローラ６に沿って搬送上下ローラ５．
６のニップ部に入る形状とする事で（第５図で紙先端の
進行方向が搬送上ローラの中心より下側になる）、搬送
上ローラの摩擦係数が小さいため、紙の進行方向に対し
て搬送上下ローラ５．６が逆回転していても紙をめくる
事なく先端を確実に搬送上下ローラ５．６のニップ部に
なられす事ができる。Here, the shape of the paper feed upper guide 4 and the paper feed lower guide 3 is such that the leading edge of the paper 1a sent out from the cassette 50 is connected to the upper conveyance roller 6.
, the upper and lower transport rollers 5.
6 (in Figure 5, the leading edge of the paper is below the center of the upper conveyance roller), and because the friction coefficient of the upper conveyance roller is small, Even if the upper and lower conveyance rollers 5.6 are rotating in reverse, the leading edge of the paper can be reliably brought into the nip of the upper and lower conveyance rollers 5.6 without turning over the paper.
他の実施例について第８図を用いて説明する。基本的な
構成は前例と同様で有るが、本実施例では紙検知アーム
１８、紙検知センサ−１９（フォトインターラブター）
が加わりさらに図には示していないが給紙ローラ２及び
搬送ローラ対５．６は別駆動源又はクラッチ等で各々独
立に回転する事ができる。Another embodiment will be described using FIG. 8. The basic configuration is the same as the previous example, but in this example, there is a paper detection arm 18, a paper detection sensor 19 (photo interlayer)
In addition, although not shown in the figure, the paper feed roller 2 and the pair of transport rollers 5.6 can each be rotated independently by separate drive sources, clutches, or the like.
つぎに上記構成で給紙ローラ２が回転し、紙１ａをカセ
ット５０から搬送ローラ対５．６へ送り出す。Next, with the above configuration, the paper feed roller 2 rotates and feeds the paper 1a from the cassette 50 to the transport roller pair 5.6.
この時搬送ローラ対５．６は停止している（第６図（ａ
））。給紙ローラ２から送り出された紙】ａは給紙上下
ガイド３．４によりＥＰＤＭの表層に７リコンコートが
付加された搬送上ローラに突き当たる。At this time, the transport roller pair 5.6 is stopped (Fig. 6(a)
)). The paper [a] sent out from the paper feed roller 2 hits the upper conveyance roller on which the surface layer of EPDM is coated with 7 recon coats by the paper feed upper and lower guides 3.4.
この時紙１ａは前例の第５図に示す形となっている（第
６図（ｂ））。搬送上ローラ６に突き当った紙１ａはさ
らに給紙ローラ２により送られ、先端が搬送ローラ対５
．６のニップに入り、給紙上ガイド４にならい搬送ロー
ラ対５．６と給紙ローラ２の間にループをつくり、ある
ループ量になると紙検知アーム１８により紙検知センサ
−１９が作動する（第６図（Ｃ））。At this time, the paper 1a has the shape shown in FIG. 5 of the previous example (FIG. 6(b)). The paper 1a that has hit the upper conveyance roller 6 is further fed by the paper feed roller 2, and the leading end touches the conveyance roller pair 5.
．． 6, a loop is created between the transport roller pair 5.6 and the paper feed roller 2 following the paper feed upper guide 4, and when a certain loop amount is reached, the paper detection sensor 19 is activated by the paper detection arm 18 (the paper detection sensor 19 is activated by the paper detection arm 18). Figure 6 (C)).
紙検知センサーの信号により搬送ローラ対５．６が回転
を始め、印字部に紙を送り出す（第６ （ｄ））。The conveying roller pair 5.6 starts rotating in response to a signal from the paper detection sensor, and feeds the paper to the printing section (6th (d)).
以降は従来例同様に順次一定幅紙を送り印字を行う。又
、給紙ローラ２は一回転した後は次の紙の給紙時まで停
止をしている（第６図（ｅ））。Thereafter, as in the conventional example, sheets of constant width are sequentially fed and printed. Further, after the paper feed roller 2 has rotated once, it stops until the next paper is fed (FIG. 6(e)).
本実施例も前例と同様に紙先端を摩擦係数の小さい搬送
上ローラを滑らす事により確実に搬送ローラ対のニップ
部に紙先端をなられす事ができ給紙による紙の斜行を除
去する事ができる。In this embodiment, as in the previous example, by sliding the leading edge of the paper over the upper transport roller with a small friction coefficient, the leading edge of the paper can be reliably brought into the nip between the pair of transporting rollers, thereby eliminating the skew of the paper caused by paper feeding. I can do things.
本実施例では弾性ローラを搬送ローラ上側に構成したが
、下側に構成しても同様な結果が得られる。In this embodiment, the elastic roller is arranged above the conveyance roller, but the same result can be obtained even if it is arranged below the conveyance roller.
又、弾性ローラの材質として、ＥＰＤＭを例に出したが
弾性体で有れば特に材質は選ばない。又、コート材とし
てシリコンを例に出したがテフロン等の低摩擦材で有れ
ば特に材料は選ばない。Further, although EPDM is taken as an example of the material of the elastic roller, the material is not particularly selected as long as it is an elastic body. Also, although silicone is used as an example of the coating material, the material is not particularly selected as long as it is a low friction material such as Teflon.
本実施例に用いられている記録ヘット１０はインクシェ
ツトヘッドであり、特にパブルンエットヘッドと呼ばれ
ているものである。The recording head 10 used in this embodiment is an ink jet head, particularly called a bubble jet head.
このバブルシェツトヘットの構成は第７図に示す如く構
成されている。The structure of this bubble head is as shown in FIG.
第７図の分解説明図に於いて、１０１はヒータホードで
あり、シリコン基板上に電気熱変換体（吐出ヒータ）１
０２、これに電力を供給するアルミニウム等の電極１０
３とが成膜されて配設されている。このヒータボード１
０１に対して、記録用液体の液路（ノズル）１０４を仕
切るための隔壁を有する天板１０５を接着することによ
り構成されている。また装置の所定位置には前記記録ヘ
ットｌＯにインクを供給するだめのインクカートリッジ
が交換可能に取り付けられている。In the exploded explanatory view of FIG. 7, 101 is a heater hoard, and an electrothermal converter (discharge heater) 1 is placed on a silicon substrate.
02, an electrode 10 made of aluminum or the like that supplies power to this
3 are formed and arranged. This heater board 1
01, a top plate 105 having a partition wall for partitioning a liquid path (nozzle) 104 for recording liquid is adhered. Further, an ink cartridge for supplying ink to the recording head 10 is replaceably attached to a predetermined position of the apparatus.
前記インクカートリッジから導管を介して供給されたイ
ンクは、天板１０５に設けられた供給口１０６より記録
ヘッドＩＯ内の供通液室１０７に充填され、この共通液
室１０７より各ノズル１０４内に導かれる。The ink supplied from the ink cartridge through the conduit is filled into a common liquid chamber 107 in the recording head IO through a supply port 106 provided on the top plate 105, and is supplied into each nozzle 104 from this common liquid chamber 107. be guided.
これらのノズル１０４にはインク吐出口１０８が形成さ
れており、また前記吐出口１０８は前記記録ヘッド１０
の記録シートに対向してシート搬送方向に所定ピッチで
形成されている。Ink ejection ports 108 are formed in these nozzles 104, and the ejection ports 108 are connected to the recording head 10.
are formed at a predetermined pitch in the sheet conveyance direction, facing the recording sheet.
本実施例ではキャリッジ１０ａの移動に同期して前記記
録ヘッド１０からインクを吐出、飛翔させてて記録を行
うものである。In this embodiment, recording is performed by ejecting and flying ink from the recording head 10 in synchronization with the movement of the carriage 10a.
ここで前記バルブジェット記録方式に於けるインク飛翔
原理については、例えば代表的な原理が米国特許第４７
２３１２９号明細書、同第４７４０７９６号明細書に開
示されている。Regarding the principle of ink flight in the above-mentioned valve jet recording method, for example, a typical principle is US Pat.
It is disclosed in the specification No. 23129 and the specification No. 4740796.
これを第８図（ａ）〜（ｇ）を参照して簡単に説明する
と、定常状態では第８図（ａ）に示すように、ノズル１
０４内に充填されているインク１１０は吐出口面で表面
張力と外圧が平衡している。この状態でインク１１０を
飛翔させる場合には、ノズル１０４内の電気熱変換体１
０２に通電し、そのノズル１０４内のインクに核沸騰を
越えて急速な温度上昇を生じさせる。すると、第８図（
ｂ）に示すように、電気熱変換体１０２に隣接したイン
クが加熱されて微小気泡（バブル）を生じ、該加熱部分
のインクが気化して膜沸騰を生じ、第８図（ｃ）に示す
ように前記気泡１１１が急速に成長する。To briefly explain this with reference to FIGS. 8(a) to (g), in a steady state, as shown in FIG. 8(a), the nozzle 1
The surface tension and external pressure of the ink 110 filled in the ink 04 are balanced on the ejection port surface. If the ink 110 is to be ejected in this state, the electrothermal converter 1 inside the nozzle 104
02 to cause the ink in the nozzle 104 to rapidly rise in temperature beyond nucleate boiling. Then, Figure 8 (
As shown in FIG. 8(b), the ink adjacent to the electrothermal converter 102 is heated to generate microbubbles, and the ink in the heated portion is vaporized to cause film boiling, as shown in FIG. 8(c). The bubbles 111 grow rapidly.
前記気泡１１１が第８図（ｄ）に示す如く最大に成長す
ると、ノズル１０４内の吐出口からインク液滴が押し出
される。そして電気熱変換体１０２への通電を終了する
と、第８図（ｅ）に示すように、成長した気泡１１１は
ノズル＋０４内のインク１１０により冷却されて収縮し
、この気泡の成長、収縮によってインク液滴が吐出口か
ら飛翔する。更に第８図（ｆ）に示すように電気熱変換
体１０２面にインクが接触して急激に冷却され、気泡Ｉ
ｌｌは消滅するか又は殆ど無視し得る程度の体積に収縮
する。そして前記気泡１１１が収縮すると、第８図（ｇ
）に示すようにノズル１０４内には毛細管現象によって
共通液室１０７からインクが供給され、次の通電に備え
るものである。When the bubble 111 grows to its maximum size as shown in FIG. 8(d), an ink droplet is extruded from the ejection opening in the nozzle 104. When the electricity is turned off to the electrothermal converter 102, the grown bubbles 111 are cooled and contracted by the ink 110 in the nozzle +04, as shown in FIG. 8(e). Droplets fly from the ejection port. Further, as shown in FIG. 8(f), the ink comes into contact with the surface of the electrothermal converter 102 and is rapidly cooled, causing bubbles I.
ll disappears or shrinks to an almost negligible volume. When the bubble 111 contracts, FIG.
), ink is supplied into the nozzle 104 from the common liquid chamber 107 by capillary action in preparation for the next energization.
従って、キャリッジ］Ｏａを往復移動させると共に、こ
の移動と同期させて画信号に応じて前記電気熱変換体１
０２に通電することによって記録シトにインク像が記録
される。Therefore, while reciprocating the carriage Oa, the electrothermal transducer 1 is synchronized with this movement in accordance with the image signal.
By energizing 02, an ink image is recorded on the recording sheet.
尚、前記インクジェット記録方式にあってはキャリッジ
の移動範囲端部に回復手段を設けるのが好ましい。Incidentally, in the inkjet recording method, it is preferable to provide a recovery means at the end of the movement range of the carriage.
前記回復手段は非記録時等に前記記録ヘッド１゜のイン
ク吐出面を覆うことによって、記録ヘッド１０の吐出口
付近のインクの乾燥や、これに伴う固化を防止する機能
を有するものである。またこの回復手段にポンプを接続
し、インクの吐出不良や除去或いはそれらの予防のため
にポンプを駆動し、その吸引力によって吐出口からイン
クを吸引して回復処理を行うものである。The recovery means has the function of covering the ink ejection surface of the print head 1° during non-printing, thereby preventing the ink near the ejection ports of the print head 10 from drying and from solidifying as a result. In addition, a pump is connected to this recovery means, and the pump is driven for the purpose of ink ejection failure, removal, or prevention, and the recovery process is performed by suctioning ink from the ejection port using its suction force.
以上説明した様に搬送ローラ対を金属の剛性ローラとシ
リコン等の低摩擦材料でコートされた弾性ローラにした
事により、
ｌ１弾性ローラの摩擦係数が小さい事より紙搬送への抵
抗を小さくでき、ブラスト処理された剛性ローラで高精
度の紙送りを安定して行う事ができる。As explained above, by using the transport roller pair as a rigid metal roller and an elastic roller coated with a low-friction material such as silicone, the friction coefficient of the l1 elastic roller is small, so the resistance to paper transport can be reduced. The blasted rigid rollers allow for stable, high-precision paper feeding.
２、弾性ローラにシリコンコートを行う事により従来の
ＥＰＤＭ等のローラの紙の貼付きを防止できる。2. By applying a silicone coating to the elastic roller, it is possible to prevent paper from sticking to conventional EPDM rollers.
３、ＥＰＤＭＯ上にシリコンコートを行う事でＥＰＤＭ
に含まれる可塑剤がインクツエツト等に使用されるコー
ト紙のコート剤と接する事が無くなり、可塑性による紙
の黄変を防止できる。3. EPDM by applying silicon coating on EPDMO
The plasticizer contained in the paper does not come into contact with the coating agent of coated paper used for ink zets, etc., and yellowing of the paper due to plasticity can be prevented.
４、摩擦係数の小さいシリコンコートローラに給紙ロー
ラより送られた紙先端を滑らし、搬送ローラ対のニップ
になられす事で給紙による紙の斜行を除去する事ができ
る。4. By sliding the leading edge of the paper fed from the paper feed roller onto a silicon coated roller with a small coefficient of friction, which forms the nip between the pair of conveyance rollers, it is possible to eliminate the skew of the paper caused by paper feeding.
第１図は本発明の第１の実施例を示す断面図、第２図は
本発明の第１の実施例を示す弾性ローラの構成図、
第３図は本発明の第２の実施例を示す断面図、第４図は
本発明の第２の実施例を示す平面図、第５図は本発明の
第２の実施例を示す断面図、第６図は本発明の第３の実
施例を示す断面図、第７図はインクジェットヘッドの構
造を示す図、第８図はインクジェットヘッドの作動原理
を説明するための図、
第９図、第１０図は従来例を示す断面図である。
１・・・紙
２・・・給紙ローラ
３・・・給紙上ガイド
４・・・給紙下ガイド
５・・・搬送下ローラ
６・・・搬送上ローラ
５０・・・カセット
（ｂ）
（ｄ）
（ｅ）Fig. 1 is a sectional view showing a first embodiment of the present invention, Fig. 2 is a configuration diagram of an elastic roller showing the first embodiment of the invention, and Fig. 3 is a sectional view showing a second embodiment of the invention. FIG. 4 is a plan view showing a second embodiment of the invention, FIG. 5 is a sectional view showing a second embodiment of the invention, and FIG. 6 is a third embodiment of the invention. 7 is a diagram showing the structure of an inkjet head, FIG. 8 is a diagram for explaining the operating principle of the inkjet head, and FIGS. 9 and 10 are sectional views showing a conventional example. 1...Paper 2...Paper feed roller 3...Upper paper feed guide 4...Lower paper feed guide 5...Lower transport roller 6...Upper transport roller 50...Cassette (b) d) (e)
Claims (2)
れた第１のローラと、 前記第１のローラよりも剛性の高い材料で形成され、前
記第１のローラと協働してシートを挾持して搬送する第
２のローラと、 を、有することを特徴とするシート搬送装置。(1) A first roller made of an elastic member whose surface is coated with a low-friction material; and a roller made of a material with higher rigidity than the first roller, which works together with the first roller to roll the sheet. A sheet conveying device comprising: a second roller that pinches and conveys the sheet;
当接するように案内するガイド部材を有する請求項第１
項記載のシート搬送装置。(2) Claim 1 further comprising a guide member that guides the fed sheet so as to come into contact with the surface of the first roller.
The sheet conveyance device described in Section 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26166790A JPH04140247A (en) | 1990-09-29 | 1990-09-29 | Sheet carrier device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26166790A JPH04140247A (en) | 1990-09-29 | 1990-09-29 | Sheet carrier device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04140247A true JPH04140247A (en) | 1992-05-14 |
Family
ID=17365077
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26166790A Pending JPH04140247A (en) | 1990-09-29 | 1990-09-29 | Sheet carrier device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04140247A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0838419A1 (en) * | 1996-10-22 | 1998-04-29 | Seiko Epson Corporation | Sheet transporting device |
| JP2013119445A (en) * | 2011-12-06 | 2013-06-17 | Fujifilm Corp | Inkjet recording apparatus and nip roller |
| JP2013220897A (en) * | 2012-04-17 | 2013-10-28 | Duplo Seiko Corp | Processing device |
-
1990
- 1990-09-29 JP JP26166790A patent/JPH04140247A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0838419A1 (en) * | 1996-10-22 | 1998-04-29 | Seiko Epson Corporation | Sheet transporting device |
| US5988635A (en) * | 1996-10-22 | 1999-11-23 | Seiko Epson Corporation | Sheet transporting device |
| JP2013119445A (en) * | 2011-12-06 | 2013-06-17 | Fujifilm Corp | Inkjet recording apparatus and nip roller |
| JP2013220897A (en) * | 2012-04-17 | 2013-10-28 | Duplo Seiko Corp | Processing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR970000611B1 (en) | Recording apparatus | |
| JP6314674B2 (en) | Image forming apparatus | |
| JP6176016B2 (en) | Image forming apparatus | |
| JPH04140247A (en) | Sheet carrier device | |
| US9522548B2 (en) | Inkjet recording device | |
| JPH04197766A (en) | Ink jet recording device | |
| JP5617124B2 (en) | Inkjet printer and media conveying method | |
| JP2019163117A (en) | Image formation apparatus and control method | |
| JP2009196768A (en) | Image forming device | |
| JP2002211056A (en) | Image forming apparatus | |
| JPS63260457A (en) | Recorder and recording medium thereof | |
| JP2593240B2 (en) | Recording device | |
| JP2023056883A (en) | Liquid discharge device | |
| JPS61280966A (en) | Ink jet recording head | |
| JP6451264B2 (en) | Image forming apparatus | |
| JP2915450B2 (en) | Liquid jet recording device | |
| JPH11216919A (en) | Image-recording apparatus, and method for transferring recording medium in image-recording apparatus | |
| JP2023106036A (en) | Printing device and driving control method for printing device | |
| JPS6357245A (en) | Recorder | |
| JP2015063084A (en) | Ink jet recorder | |
| JPS6369652A (en) | Recorder | |
| JP2020199660A (en) | Printing device and printing method | |
| JP2006143454A (en) | Sheet storage device and sheet feeder | |
| JPS6357241A (en) | Recorder | |
| JPH01238946A (en) | Recorder |