JP2005112509A - Paper sheet feeding mechanism - Google Patents

Paper sheet feeding mechanism Download PDF

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JP2005112509A
JP2005112509A JP2003345913A JP2003345913A JP2005112509A JP 2005112509 A JP2005112509 A JP 2005112509A JP 2003345913 A JP2003345913 A JP 2003345913A JP 2003345913 A JP2003345913 A JP 2003345913A JP 2005112509 A JP2005112509 A JP 2005112509A
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roller
paper feed
pressure contact
pressure
feed roller
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Eibun Abe
栄文 阿部
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Alps Alpine Co Ltd
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Alps Electric Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a paper sheet feeding mechanism capable of making normal transport of recording sheets upon certain gripping by correcting the deflection of a pressure contact roller which is in pressure contact with a sheet feed roller. <P>SOLUTION: The paper sheet feeding mechanism 1 is equipped with the sheet feed roller 2 having a columnar outside shape, the pressure contact roller 3 to abut to the sheet feed roller 2, and the recording medium 6 pinched in pressure contact by the pressure contact roller 3 and the sheet feed roller 2 and transportable with rotation of the feed roller 2, wherein the pressure contact roller 3 is energized at its two ends in the longitudinal direction resiliently by a resilient member 4 so as to be put in pressure contact with the feed roller 2, and a deflection correcting member 5 capable of correcting the deflection of the pressure contact roller 3 generated by the energizing force of the resilient member 4 is installed in at least one position on the pressure contact roller 3 which is in pressure contact with the feed roller 2. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

本発明は紙送り機構に係わり、特にプリンタ等の印刷装置に使用され、紙送りローラと圧接ローラとの間に圧接狭持した記録媒体を好適に搬送可能な紙送り機構に関する。   The present invention relates to a paper feed mechanism, and more particularly to a paper feed mechanism that is used in a printing apparatus such as a printer and that can suitably transport a recording medium that is held in pressure contact between a paper feed roller and a pressure contact roller.

従来の紙送り機構２１は、図３に示すように、所定の直径寸法で円柱状に形成された紙送りローラ２２が配設され、この紙送りローラ２２の外周面２２ａには、円周方向と軸方向とに所定のピッチ寸法と高さ寸法で複数の突起を突出させた突起部２３が形成されている。
そして、紙送りローラ２２は、長手方向の両端部から突出形成された回転軸２２ｂ、２２ｂが、プリンタ等の印刷装置（図示せず）の筐体側に回転可能に支持されている。 As shown in FIG. 3, the conventional paper feed mechanism 21 is provided with a paper feed roller 22 formed in a cylindrical shape with a predetermined diameter dimension, and an outer peripheral surface 22 a of the paper feed roller 22 has a circumferential direction. Projections 23 are formed by projecting a plurality of projections with a predetermined pitch dimension and height dimension in the axial direction.
The paper feed roller 22 is rotatably supported on the housing side of a printing apparatus (not shown) such as a printer by rotating shafts 22b and 22b that are formed to protrude from both ends in the longitudinal direction.

また、紙送りローラ２２の外周面には、直径寸法と長さ寸法が紙送りローラ２２と略同等に形成された圧接ローラ２４が、紙送りローラ２２と平行に配設されている。
前記圧接ローラ２４は、長手方向の両端部から突出形成された回転軸２４ａ、２４ａが、印刷装置の筐体側に回転自在に支持されている。また、圧接ローラ２４は、回転軸２４ａ、２４ａがコイルバネ２５等で弾性付勢されて、紙送りローラ２２の外周面２２ａに所定の圧接圧で圧接している。 A pressure contact roller 24 having a diameter dimension and a length dimension substantially equal to those of the paper feed roller 22 is disposed on the outer peripheral surface of the paper feed roller 22 in parallel with the paper feed roller 22.
The pressure roller 24 has rotating shafts 24a and 24a formed so as to protrude from both ends in the longitudinal direction, and is rotatably supported on the casing side of the printing apparatus. Further, the rotary roller 24a, 24a is elastically biased by a coil spring 25 or the like, and the press roller 24 presses the outer peripheral surface 22a of the paper feed roller 22 with a predetermined press contact pressure.

前記紙送りローラ２２と圧接ローラ２４との間には、所定の厚さの記録用紙２６が圧接狭持されるようになっている。
そして、紙送りローラ２２の回転により、突起部２３に形成した複数の突起が記録用紙２６に突き刺さって、記録用紙２６を往復搬送可能になっている。
前記記録用紙２６に、例えば所望の画像を印刷する場合には、紙送りローラ２２の回転で記録用紙２６を印刷装置（図示せず）側の印刷部に搬送して、記録用紙２６に所望の画像を印刷するようになっている。 A recording sheet 26 having a predetermined thickness is sandwiched between the paper feed roller 22 and the pressure roller 24 by pressure.
Then, the rotation of the paper feed roller 22 allows a plurality of protrusions formed on the protrusion 23 to pierce the recording paper 26 so that the recording paper 26 can be reciprocated.
For example, when a desired image is printed on the recording paper 26, the recording paper 26 is conveyed to a printing unit (not shown) by the rotation of the paper feed roller 22, and the desired paper is printed on the recording paper 26. An image is printed.

このような従来の紙送り機構２１の圧接ローラ２４は、直径が紙送りローラ２２の直径と略同じ太さ、もしくはそれより太く形成されていたために、材料費が高くなり、紙送り機構２１がコストアップになる問題があった。
その対策として、従来は、図４に示すように、圧接ローラ３４の太さを細くしてコストダウンした紙送り機構３１を用いて、記録用紙２６を搬送していた。 The pressure roller 24 of the conventional paper feed mechanism 21 has a diameter that is approximately the same as or larger than the diameter of the paper feed roller 22, so that the material cost increases, and the paper feed mechanism 21 There was a problem of increasing costs.
Conventionally, as shown in FIG. 4, the recording paper 26 is transported by using a paper feeding mechanism 31 in which the thickness of the pressure roller 34 is reduced to reduce the cost.

特開平４−２１６９７３号公報JP-A-4-216773 特開平１１−７９４６１号公報JP-A-11-79461

しかし、圧接ローラ３４を細くすると、図４に示すように、回転軸３４ａ、３４ａを弾性付勢するコイルバネ２５の付勢力で、圧接ローラ３４の長手方向の中央部が紙送りローラ２２から離れる方向に撓むおそれがあった。
前記圧接ローラ３４が撓むと、記録用紙２６に突き刺さる突起部２３の複数の突起の突き刺さり量にバラツキが発生して、記録用紙２６のグリップ力が低下し、記録用紙２６を正常に搬送できなくなるおそれがあった。
本発明は前述したような課題を解決して、紙送りローラに圧接する圧接ローラの撓みを矯正して、記録用紙を確実にグリップして正常な搬送を行うことができる紙送り機構を提供することを目的とする。 However, when the pressure roller 34 is thinned, the longitudinal center portion of the pressure roller 34 is separated from the paper feed roller 22 by the biasing force of the coil spring 25 that elastically biases the rotating shafts 34a and 34a as shown in FIG. There was a risk of bending.
If the pressure roller 34 bends, the amount of protrusions of the protrusions 23 that pierce the recording paper 26 may vary, reducing the gripping force of the recording paper 26 and making it impossible to transport the recording paper 26 normally. was there.
The present invention solves the above-described problems and provides a paper feed mechanism that corrects the deflection of the pressure contact roller that is in pressure contact with the paper feed roller so that the recording paper can be securely gripped to perform normal conveyance. For the purpose.

前記課題を解決するための第１の手段として本発明の紙送り機構は、外形が円柱状の紙送りローラと、この紙送りローラに当接する圧接ローラと、この圧接ローラと前記紙送りローラとの間に圧接狭持されて前記紙送りローラの回転で搬送可能な記録媒体とを備え、
前記圧接ローラは、長手方向の両端部が弾性部材で弾性付勢されて前記紙送りローラに圧接され、前記紙送りローラに圧接する前記圧接ローラの少なくとも１箇所に、前記弾性部材の付勢力で生じる前記圧接ローラの撓みを矯正可能な撓み矯正部材を配設したことを特徴とする。 As a first means for solving the above problems, a paper feed mechanism of the present invention includes a paper feed roller having an outer shape of a cylinder, a pressure roller in contact with the paper feed roller, the pressure roller, and the paper feed roller. A recording medium that is held in pressure contact between and can be conveyed by rotation of the paper feed roller,
The pressure contact roller is elastically biased at both ends in the longitudinal direction by an elastic member and is pressed against the paper feed roller, and at least one portion of the pressure roller that presses against the paper feed roller is biased by the elastic member. A bending correction member capable of correcting the generated bending of the pressure roller is provided.

また、前記課題を解決するための第２の手段として、前記撓み矯正部材には、前記圧接ローラを前記紙送りローラに押圧可能なロールが配設され、前記圧接ローラを押圧する前記ロールは、前記圧接ローラの回転に追従して回転自在になっていることを特徴とする。   Further, as a second means for solving the above-described problem, the deflection correcting member is provided with a roll capable of pressing the pressure contact roller against the paper feed roller, and the roll pressing the pressure contact roller includes: It is characterized by being able to rotate following the rotation of the pressure roller.

また、前記課題を解決するための第３の手段として、前記ロールは、前記圧接ローラの長手方向と直交する直径方向に所定の間隔を有して２個配設し、この２個のロールで前記圧接ローラの外周部を前記押圧するようにしたこと特徴とする。   Further, as a third means for solving the above-mentioned problem, two rolls are arranged with a predetermined interval in the diameter direction orthogonal to the longitudinal direction of the pressure roller, and the two rolls are used. The outer peripheral portion of the pressure roller is pressed.

また、前記課題を解決するための第４の手段として、前記ロールは、ベアリングからなることを特徴とする。   Further, as a fourth means for solving the above-mentioned problem, the roll is made of a bearing.

また、前記課題を解決するための第５の手段として、前記撓み矯正部材には、前記圧接ローラを前記紙送りローラ側に押圧可能な押圧部が形成され、前記押圧部は、回転する前記圧接ローラの外周部が摺動可能になっていることを特徴とする。   As a fifth means for solving the above-mentioned problem, the deflection correcting member is formed with a pressing portion capable of pressing the pressure contact roller toward the paper feed roller, and the pressure portion is rotated by the pressure contact. The outer periphery of the roller is slidable.

また、前記課題を解決するための第６の手段として、前記押圧部は、前記圧接ローラと同じ半径寸法の円弧状に形成されていることを特徴とする。   Further, as a sixth means for solving the above-mentioned problem, the pressing portion is formed in an arc shape having the same radius as the pressure roller.

本発明は、紙送りローラに圧接する圧接ローラの少なくとも１箇所に、弾性部材の付勢力で生じる圧接ローラの撓みを矯正可能な撓み矯正部材を配設したので、圧接ローラに発生する撓みを撓み矯正部材で確実に矯正することができる。
そのために、圧接ローラが細くても良く、圧接ローラの材料費を安くでき、低コストの紙送り機構を提供できる。
また、撓み矯正部材で圧接ローラに発生した撓みを矯正することで、記録媒体を紙送りローラに均一に圧接することができ、記録媒体を高精度に搬送することができる。 In the present invention, since the bending correction member capable of correcting the bending of the pressure roller caused by the urging force of the elastic member is disposed in at least one position of the pressure roller pressed against the paper feed roller, the bending generated in the pressure roller is bent. Correcting with the correcting member is possible.
Therefore, the pressure roller may be thin, the material cost of the pressure roller can be reduced, and a low-cost paper feeding mechanism can be provided.
Further, by correcting the deflection generated on the pressure roller by the deflection correcting member, the recording medium can be uniformly pressed against the paper feed roller, and the recording medium can be conveyed with high accuracy.

また、撓み矯正部材には、圧接ローラを紙送りローラに押圧可能なロールが配設され、圧接ローラを押圧するロールは、圧接ローラの回転に追従して回転自在になっているので、ロールで押圧しても圧接ローラの回転負荷が大きくならず、紙送りローラを回転駆動する駆動源が小型で良い。   In addition, the deflection correcting member is provided with a roll capable of pressing the pressure roller against the paper feed roller, and the roll pressing the pressure roller is rotatable following the rotation of the pressure roller. Even if pressed, the rotational load of the pressure contact roller does not increase, and the drive source for rotationally driving the paper feed roller may be small.

また、ロールは、圧接ローラの長手方向と直交する直径方向に所定の間隔を有して２個配設し、この２個のロールで圧接ローラの外周部を押圧するようにしたので、圧接ローラに発生する撓みを確実に矯正することができる。   In addition, since two rolls are arranged at a predetermined interval in the diameter direction orthogonal to the longitudinal direction of the pressure roller, and the two rollers press the outer peripheral portion of the pressure roller, the pressure roller Can be reliably corrected.

また、ロールは、ベアリングからなるので、ロールが押圧する圧接ローラの回転負荷を更に小さくすることができる。   Further, since the roll is made of a bearing, the rotational load of the pressure roller pressed by the roll can be further reduced.

また、撓み矯正部材には、圧接ローラを紙送りローラ側に押圧可能な押圧部が形成され、押圧部は、回転する圧接ローラの外周部が摺動可能になっているので、部品点数を増やすことなく、圧接ローラの回転負荷を小さくできる。   Further, the deflection correcting member is formed with a pressing portion capable of pressing the pressure contact roller toward the paper feed roller, and the pressing portion can slide the outer peripheral portion of the rotating pressure contact roller, thereby increasing the number of parts. Therefore, the rotational load of the pressure roller can be reduced.

また、押圧部は、圧接ローラと同じ半径寸法の円弧状に形成されているので、回転する圧接ローラを押圧部が押圧して撓みを確実に矯正することができる。   Further, since the pressing portion is formed in an arc shape having the same radius as that of the pressing roller, the pressing portion can press the rotating pressing roller to reliably correct the bending.

以下、図面に基づいて本発明の実施の形態について説明する。まず、図１は本発明の第１の実施の形態の紙送り機構の斜視図であり、図２は本発明の第２の実施の形態の紙送り機構の斜視図である。
まず、本発明の第１の実施の形態の紙送り機構１は、図１に示すように、金属からなる紙送りローラ２が配設されており、この紙送りローラ２は、所定の直径寸法からなるローラ部２ａが円柱状に形成されている。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a perspective view of a paper feed mechanism according to a first embodiment of the present invention, and FIG. 2 is a perspective view of a paper feed mechanism according to a second embodiment of the present invention.
First, as shown in FIG. 1, the paper feed mechanism 1 according to the first embodiment of the present invention is provided with a paper feed roller 2 made of metal, and the paper feed roller 2 has a predetermined diameter dimension. The roller part 2a which consists of is formed in the column shape.

また、ローラ部２ａには、外周面の円周方向と軸方向とに所定のピッチ寸法と高さ寸法で突出形成した複数の突起を有する突起部２ｂが、後述する両端部の回転軸２ｃ、２ｃ寄りの２箇所に、所定の幅寸法で設けられている。
前記ローラ部２ａの長手方向の両端部からは、ローラ部２ａの軸心と同じ軸心の回転軸２ｃ、２ｃがそれぞれ形成され、この回転軸２ｃ、２ｃがプリンタ等の印刷装置（図示せず）の筐体側に支持されて、紙送りローラ２が回転可能になっている。 Further, the roller portion 2a has a plurality of protrusions 2b formed to protrude with a predetermined pitch dimension and height dimension in the circumferential direction and the axial direction of the outer peripheral surface, and rotation shafts 2c at both ends described later, It is provided with a predetermined width dimension at two locations close to 2c.
Rotating shafts 2c and 2c having the same axis as that of the roller portion 2a are respectively formed from both ends in the longitudinal direction of the roller portion 2a. The rotating shafts 2c and 2c are formed by a printing device (not shown) such as a printer. ), The paper feed roller 2 is rotatable.

前記ローラ部２ａの外周面には、ローラ部３ａを有する圧接ローラ３が、紙送りローラ２と平行に配設されている。
また、圧接ローラ３の長手方向の両端部からは、ローラ部３ａの軸心と同じ軸心の回転軸３ｂ、３ｂがそれぞれ形成され、この回転軸３ｂ、３ｂが印刷装置の筐体（図示せず）側に支持されて、圧接ローラ３が回転自在になっている。 A pressure roller 3 having a roller portion 3 a is disposed on the outer peripheral surface of the roller portion 2 a in parallel with the paper feed roller 2.
Further, rotation shafts 3b and 3b having the same axis as that of the roller portion 3a are respectively formed from both ends in the longitudinal direction of the pressure roller 3, and the rotation shafts 3b and 3b are formed in a casing (not shown) of the printing apparatus. And the pressure roller 3 is rotatable.

また、圧接ローラ３は、両端部の回転軸３ｂ、３ｂが、コイルバネ等の弾性部材４、４で弾性付勢されて、ローラ部３ａが紙送りローラ２のローラ部２ａに形成した突起部２ｂの複数の突起に圧接可能になっている。
前記圧接ローラ３は、紙送りローラ２のローラ部２ａに圧接する部分のローラ部３ａに、従来の課題で説明したような、弾性部材４の付勢力で生じるローラ部３ａの撓みを矯正可能な撓み矯正部材５が、押圧ローラ３の長手方向に等間隔で３個配設されている。 Further, the pressure roller 3 has a protruding portion 2b formed on the roller portion 2a of the paper feed roller 2 by rotating the rotation shafts 3b and 3b at both ends elastically by elastic members 4 and 4 such as coil springs. The plurality of protrusions can be pressed.
The pressure roller 3 can correct the deflection of the roller portion 3a caused by the urging force of the elastic member 4 as described in the conventional problem on the roller portion 3a of the paper feed roller 2 that is in pressure contact with the roller portion 2a. Three deflection correcting members 5 are arranged at equal intervals in the longitudinal direction of the pressing roller 3.

前記撓み矯正部材５は、基台５ａと、この基台５ａの２箇所に、圧接ローラ３の長手方向と直交する直径方向に所定の間隔を有して、例えばボールベアリングからなる２個のロール５ｂ、５ｂが回転自在に支持されて構成されている。
また、３個の撓み矯正部材５は、基台５ａが印刷装置側の筐体（図示せず）側に取り付けた調整ネジ（図示せず）にそれぞれ支持され、この調整ネジをそれぞれ個別に調整することで、圧接ローラ３のローラ部３ａを押圧する２個のロール５ａ、５ａの押圧力を調整可能になっている。 The deflection correcting member 5 includes a base 5a and two rolls made of, for example, ball bearings at two locations on the base 5a with a predetermined distance in the diameter direction perpendicular to the longitudinal direction of the pressure roller 3. 5b and 5b are rotatably supported.
The three deflection correcting members 5 are respectively supported by adjustment screws (not shown) attached to the base 5a on the casing (not shown) side of the printing apparatus, and the adjustment screws are individually adjusted. By doing so, it is possible to adjust the pressing force of the two rolls 5a and 5a that press the roller portion 3a of the pressing roller 3.

そして、調整ネジでロール５ａの押圧力を調整することにより、圧接ローラ３に発生する撓みを確実に矯正して、圧接ローラ３を紙送りローラ２に対して均一に圧接することができる。
また、ロール５ｂは、ボールベアリングからなるので、調整ネジの調整でロール５ｂを圧接ローラ３に強く押圧しても、圧接ローラ３の回転に追従してスムーズに回転させることができる。
そのために、押圧ローラ３が圧接する紙送りローラ２の回転負荷が大きくなるのを防止でき、紙送りローラ２を回転駆動するモータ等を小型化できる。 Then, by adjusting the pressing force of the roll 5a with the adjusting screw, it is possible to surely correct the bending generated in the pressure roller 3, and to press the pressure roller 3 uniformly against the paper feed roller 2.
Moreover, since the roll 5b consists of a ball bearing, even if the roll 5b is strongly pressed against the pressure roller 3 by adjusting the adjusting screw, it can be smoothly rotated following the rotation of the pressure roller 3.
For this reason, it is possible to prevent an increase in the rotational load of the paper feed roller 2 to which the pressing roller 3 is pressed, and it is possible to reduce the size of a motor for rotating the paper feed roller 2.

また、紙送りローラ２と圧接ローラ３との間には、例えば印画紙等の厚紙からなる２点差線で示すような記録媒体６が圧接狭持されている。そして、紙送りローラ２を正転、あるいは逆転することにより、突起部２ｃの複数の突起が喰いむことにより記録媒体６が確実にグリップされて、記録媒体６を高精度に搬送可能になっている。
また、本発明の第１の実施の形態の紙送り機構１をプリンタ等の印刷装置（図示せず）に用いて、記録媒体６に例えば所望の画像を印刷するには、紙送りローラ２の回転で印刷装置側の印刷部（図示せず）に記録媒体６を搬送して、この記録媒体６に所望の画像を印刷できるようになっている。 Further, between the paper feed roller 2 and the pressure contact roller 3, a recording medium 6 as shown by a two-point difference line made of thick paper such as photographic paper is pressed and sandwiched. Then, by rotating the paper feed roller 2 forward or reverse, the recording medium 6 is securely gripped by the plurality of protrusions of the protrusion 2c being engulfed, and the recording medium 6 can be conveyed with high accuracy. Yes.
In order to print, for example, a desired image on the recording medium 6 using the paper feed mechanism 1 according to the first embodiment of the present invention in a printing apparatus (not shown) such as a printer, the paper feed roller 2 The recording medium 6 is conveyed to a printing unit (not shown) on the printing apparatus side by rotation, and a desired image can be printed on the recording medium 6.

また、本発明の第２の実施の形態の紙送り機構１１は、図２に示すように、撓み矯正部材１５だけが第１の実施の形態の紙送り機構１と異なる。そのために、撓み矯正部材１５以外の部材は、第１の実施の形態と同じ番号を付して説明は省略する。
本発明の第２の実施の形態に係わる撓み矯正部材１５は、樹脂材料からなる基台１５ａと、この基台１５ａの下部に形成した円弧状の押圧部１５ｂとにより構成されている。 Further, as shown in FIG. 2, the paper feeding mechanism 11 according to the second embodiment of the present invention is different from the paper feeding mechanism 1 according to the first embodiment only in the deflection correcting member 15. Therefore, members other than the deflection correction member 15 are assigned the same numbers as in the first embodiment, and description thereof is omitted.
The deflection correcting member 15 according to the second embodiment of the present invention includes a base 15a made of a resin material and an arc-shaped pressing portion 15b formed at the lower portion of the base 15a.

前記押圧部１５ｂは、圧接ローラ３のローラ部３ａと同じ半径寸法の円弧状に形成されて、圧接ローラ３のローラ部３ａを押圧可能になっていると共に、回転する押圧ローラ３の外周部が摺動可能になっている。
このような第２の実施の形態の撓み矯正部材１５は、第１の実施の形態の撓み矯正部材５と同様に、基台１５ａが印刷装置の筐体（図示せず）側に調整ネジ（図示せず）に支持され、この調整ネジを調整することで、圧接ローラ３のローラ部３ａを押圧する押圧部１５ｂの押圧力を調整可能になっている。 The pressing portion 15b is formed in an arc shape having the same radius as the roller portion 3a of the pressing roller 3, and can press the roller portion 3a of the pressing roller 3, and the outer peripheral portion of the rotating pressing roller 3 is It is slidable.
In such a deflection correcting member 15 of the second embodiment, the base 15a has an adjustment screw (not shown) on the housing (not shown) side of the printing apparatus, similarly to the deflection correcting member 5 of the first embodiment. The pressing force of the pressing portion 15b that presses the roller portion 3a of the pressure roller 3 can be adjusted by adjusting the adjusting screw.

そして、調整ネジによって、圧接ローラ３を押圧する押圧部１５ｂの押圧力を調整することにより、圧接ローラ３に発生する撓みを矯正して、圧接ローラ３を紙送りローラ２に対して均一に圧接することができる。
また、押圧部１５ｂは、円弧状に形成されて圧接ローラ３の外周部が摺動可能になっているので、調整ネジの調整で押圧部１５ｂを圧接ローラ３に強く押圧しても、回転する圧接ローラ３の外周部がスムーズに摺動するようになっている。 Then, by adjusting the pressing force of the pressing portion 15b that presses the pressure roller 3 with the adjusting screw, the bending generated in the pressure roller 3 is corrected, and the pressure roller 3 is uniformly pressed against the paper feed roller 2. can do.
The pressing portion 15b is formed in an arc shape so that the outer peripheral portion of the pressing roller 3 is slidable. Therefore, even if the pressing portion 15b is strongly pressed against the pressing roller 3 by adjusting the adjusting screw, the pressing portion 15b rotates. The outer peripheral portion of the pressure contact roller 3 slides smoothly.

また、撓み矯正部材１５は、第１の実施の形態と同様に、圧接ローラ３の長手方向に等間隔で３個配設されているので、３個の撓み矯正部材１５をそれぞれ個別に調整ネジで調整することにより、圧接ローラ３に発生する撓みを確実に矯正して、圧接ローラ３を紙送りローラ２に対して均一に圧接することができる。
そのために、本発明の第２の実施の形態の紙送り機構１１は、記録媒体６を高精度に搬送可することができるようになっている。 Since the three deflection correction members 15 are arranged at equal intervals in the longitudinal direction of the pressure contact roller 3 as in the first embodiment, the three deflection correction members 15 are individually adjusted by adjusting screws. By adjusting in step (3), it is possible to surely correct the bending generated in the pressure roller 3 and uniformly press the pressure roller 3 against the paper feed roller 2.
Therefore, the paper feeding mechanism 11 according to the second embodiment of the present invention can transport the recording medium 6 with high accuracy.

尚、本発明の第１、第２の実施の形態では、圧接ローラ３の長手方向に撓み矯正部材５、１５を３個配設したもので説明したが、圧接ローラ３は、紙送りローラ２に圧接する部分の少なくとも１箇所に撓み矯正部材５、１５を配設したものでも良い。そして、１個の撓み矯正部材５、１５は、圧接ローラ３の略中央部を押圧するようにすれば、圧接ローラ３に発生する撓みを矯正できる。
また、第１の実施の形態の撓み矯正部材５のロール５ｂをボールベアリングで説明したが、ロール５ｂは、コロ等の回転自在なものであれば良い。 In the first and second embodiments of the present invention, the three deflection correcting members 5 and 15 are arranged in the longitudinal direction of the pressure roller 3. However, the pressure roller 3 is a paper feed roller 2. The bending correction members 5 and 15 may be disposed in at least one of the portions that are in pressure contact with each other. And if the one bending correction member 5 and 15 presses the approximate center part of the press roller 3, it can correct the bending which generate | occur | produces in the press roller 3. FIG.
Moreover, although the roll 5b of the deflection correction member 5 of the first embodiment has been described as a ball bearing, the roll 5b may be any one that is rotatable such as a roller.

本発明の第１の実施の形態の紙送り機構の斜視図である。It is a perspective view of the paper feed mechanism of a 1st embodiment of the present invention. 本発明の第２の実施の形態の紙送り機構の斜視図である。It is a perspective view of the paper feed mechanism of the 2nd Embodiment of this invention. 従来の紙送り機構の斜視図である。It is a perspective view of the conventional paper feed mechanism. 従来の紙送り機構の斜視図である。It is a perspective view of the conventional paper feed mechanism.

符号の説明Explanation of symbols

１ 本発明の紙送り機構
２ 紙送りローラ
２ａ ローラ部
２ｂ 突起部
２ｃ 回転軸
３ 圧接ローラ
３ａ ローラ部
３ｂ 回転軸
４ 弾性部材
５ 撓み矯正部材
５ａ 基台
５ｂ ロール
６ 記録媒体
DESCRIPTION OF SYMBOLS 1 Paper feed mechanism of this invention 2 Paper feed roller 2a Roller part 2b Protrusion part 2c Rotating shaft 3 Pressure roller 3a Roller part 3b Rotating shaft
4 Elastic member 5 Deflection correction member
5a base 5b roll 6 recording medium

Claims (6)

外形が円柱状の紙送りローラと、この紙送りローラに当接する圧接ローラと、この圧接ローラと前記紙送りローラとの間に圧接狭持されて前記紙送りローラの回転で搬送可能な記録媒体とを備え、
前記圧接ローラは、長手方向の両端部が弾性部材で弾性付勢されて前記紙送りローラに圧接され、前記紙送りローラに圧接する前記圧接ローラの少なくとも１箇所に、前記弾性部材の付勢力で生じる前記圧接ローラの撓みを矯正可能な撓み矯正部材を配設したことを特徴とする紙送り機構。 A paper feed roller having a cylindrical outer shape, a pressure contact roller in contact with the paper feed roller, and a recording medium that is nipped between the pressure contact roller and the paper feed roller and can be conveyed by the rotation of the paper feed roller And
The pressure contact roller is elastically biased at both ends in the longitudinal direction by an elastic member and is pressed against the paper feed roller, and at least one portion of the pressure roller that presses against the paper feed roller is biased by the elastic member. A paper feed mechanism comprising a deflection correcting member capable of correcting the generated deflection of the pressure roller. 前記撓み矯正部材には、前記圧接ローラを前記紙送りローラに押圧可能なロールが配設され、前記圧接ローラを押圧する前記ロールは、前記圧接ローラの回転に追従して回転自在になっていることを特徴とする請求項１記載の紙送り機構。 The deflection correcting member is provided with a roll capable of pressing the pressure contact roller against the paper feed roller, and the roll pressing the pressure contact roller is rotatable following the rotation of the pressure contact roller. The paper feed mechanism according to claim 1. 前記ロールは、前記圧接ローラの長手方向と直交する直径方向に所定の間隔を有して２個配設し、この２個のロールで前記圧接ローラの外周部を前記押圧するようにしたこと特徴とする請求項２記載の紙送り機構。 Two rolls are arranged with a predetermined interval in the diameter direction perpendicular to the longitudinal direction of the pressure roller, and the two rolls press the outer peripheral portion of the pressure roller. The paper feed mechanism according to claim 2. 前記ロールは、ベアリングからなることを特徴とする請求項２または３記載の紙送り機構。 The paper feed mechanism according to claim 2, wherein the roll is made of a bearing. 前記撓み矯正部材には、前記圧接ローラを前記紙送りローラ側に押圧可能な押圧部が形成され、前記押圧部は、回転する前記圧接ローラの外周部が摺動可能になっていることを特徴とする請求項１記載の紙送り機構。 The deflection correcting member is formed with a pressing portion capable of pressing the pressure roller toward the paper feed roller, and the pressing portion is configured such that an outer peripheral portion of the rotating pressure roller is slidable. The paper feed mechanism according to claim 1. 前記押圧部は、前記圧接ローラと同じ半径寸法の円弧状に形成されていることを特徴とする請求項５記載の紙送り機構。
The paper feeding mechanism according to claim 5, wherein the pressing portion is formed in an arc shape having the same radius as the pressure roller.
JP2003345913A 2003-10-03 2003-10-03 Paper sheet feeding mechanism Withdrawn JP2005112509A (en)

Priority Applications (1)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013193859A (en) * 2012-03-22 2013-09-30 Mitsubishi Electric Corp Sheet transporting mechanism and printer
JP2014099502A (en) * 2012-11-14 2014-05-29 Lintec Corp Sheet application device and application method and pressing device and pressing method
US10029488B2 (en) 2015-11-30 2018-07-24 Seiko Epson Corporation Printing apparatus
JP2020026341A (en) * 2018-08-13 2020-02-20 キヤノンファインテックニスカ株式会社 Sheet bundle discharge device
JP7425988B2 (en) 2019-11-06 2024-02-01 株式会社リコー Image forming device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013193859A (en) * 2012-03-22 2013-09-30 Mitsubishi Electric Corp Sheet transporting mechanism and printer
JP2014099502A (en) * 2012-11-14 2014-05-29 Lintec Corp Sheet application device and application method and pressing device and pressing method
US10029488B2 (en) 2015-11-30 2018-07-24 Seiko Epson Corporation Printing apparatus
JP2020026341A (en) * 2018-08-13 2020-02-20 キヤノンファインテックニスカ株式会社 Sheet bundle discharge device
JP7148316B2 (en) 2018-08-13 2022-10-05 キヤノンファインテックニスカ株式会社 Sheet bundle discharge device
JP7425988B2 (en) 2019-11-06 2024-02-01 株式会社リコー Image forming device

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