JP4204995B2 - Paper transport device - Google Patents

Paper transport device Download PDF

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Publication number
JP4204995B2
JP4204995B2 JP2004038009A JP2004038009A JP4204995B2 JP 4204995 B2 JP4204995 B2 JP 4204995B2 JP 2004038009 A JP2004038009 A JP 2004038009A JP 2004038009 A JP2004038009 A JP 2004038009A JP 4204995 B2 JP4204995 B2 JP 4204995B2
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Prior art keywords
pressure roller
pressure
roller shaft
roller
plate spring
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JP2004038009A
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JP2005225651A (en
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康太郎 金津
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Ricoh Co Ltd
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Ricoh Co Ltd
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Description

本発明は、画像形成装置に組み込まれる用紙搬送装置に関する。   The present invention relates to a sheet conveying device incorporated in an image forming apparatus.

図５は一般的な用紙搬送装置の正面図、図６はその加圧ローラ部の斜視図である。図５に示すように、用紙搬送装置は搬送ローラ（駆動ローラ）１と、この搬送ローラ１に圧接される加圧ローラ（従動ローラ）２とを備えている。加圧ローラ２には加圧ローラ軸３が通され（固定はされていない）、この加圧ローラ軸３の両端部に、一端が板バネ固定部５に固定された２枚（図６参照）の加圧板バネ４の先端部（自由端部）を圧接させることにより搬送ローラ１に対して加圧ローラの加圧力を発生させている。   FIG. 5 is a front view of a general paper conveying apparatus, and FIG. 6 is a perspective view of a pressure roller portion thereof. As shown in FIG. 5, the sheet conveying apparatus includes a conveying roller (driving roller) 1 and a pressure roller (driven roller) 2 that is pressed against the conveying roller 1. A pressure roller shaft 3 is passed through the pressure roller 2 (not fixed), and the two ends of the pressure roller shaft 3 are fixed to the leaf spring fixing portion 5 at one end (see FIG. 6). The pressure roller spring 4 is pressed against the transport roller 1 by pressing the tip (free end) of the pressure plate spring 4.

上述したように、搬送ローラに対する加圧ローラの加圧力を発生させるために、加圧板バネが用いられる。この構成においては基本的に加圧ローラ２のみが回転し、加圧ローラ軸３は回転せず、加圧力を加圧ローラに与える役割をしている。
しかし上記のねらいにもかかわらず、この構成においては加圧ローラ軸が加圧ローラと共に回転してしまう場合がある。ここで加圧ローラ軸が回転すること自体は問題ではないが、加圧ローラ軸の回転によって加圧ローラ軸と加圧板バネの当接部おいて異音発生などの不具合が生じることがある。
本発明は、加圧ローラ軸の回転による、加圧ローラ軸と加圧板バネの当接部における異音の発生を防止することができる用紙搬送装置を提供することを目的とする。 As described above, a pressure leaf spring is used to generate pressure applied by the pressure roller to the transport roller. In this configuration, basically only the pressure roller 2 rotates, the pressure roller shaft 3 does not rotate, and serves to apply pressure to the pressure roller.
However, in spite of the above aim, in this configuration, the pressure roller shaft may rotate together with the pressure roller. Here, the rotation of the pressure roller shaft itself is not a problem, but the rotation of the pressure roller shaft may cause problems such as the generation of abnormal noise at the contact portion between the pressure roller shaft and the pressure leaf spring.
SUMMARY OF THE INVENTION An object of the present invention is to provide a paper transport device that can prevent the generation of noise at the contact portion between a pressure roller shaft and a pressure leaf spring due to the rotation of the pressure roller shaft.

上記目的を達成するために、請求項１記載の発明は、搬送ローラと加圧ローラとを備え、加圧ローラを支持する加圧ローラ軸の両端部に、加圧板バネを圧接することにより搬送ローラに加圧ローラを圧接する用紙搬送装置において、加圧板バネの先端部に形成した折り曲げ部の上面とその側部の加圧板バネの底面との間に加圧ローラ軸を挟み込むと共に、折り曲げ部の上面に両面テープを貼付した用紙搬送装置を最も主要な特徴とする。
請求項２記載の発明は、搬送ローラと加圧ローラとを備え、加圧ローラを支持する加圧ローラ軸の両端部に、加圧板バネを圧接することにより搬送ローラに加圧ローラを圧接する用紙搬送装置において、加圧板バネの下面における加圧ローラ軸との当接部に両面テープを貼付した用紙搬送装置を最も主要な特徴とする。 In order to achieve the above object, the invention according to claim 1 includes a conveying roller and a pressure roller, and conveys the pressure roller spring by pressing the pressure plate springs at both ends of the pressure roller shaft that supports the pressure roller. In a paper conveying apparatus in which a pressure roller is pressed against a roller, the pressure roller shaft is sandwiched between the upper surface of the bent portion formed at the tip of the pressure plate spring and the bottom surface of the pressure plate spring on the side, and the bent portion The most important feature is a paper transport device in which a double-sided tape is attached to the upper surface of the paper.
According to a second aspect of the present invention, the conveyance roller and the pressure roller are provided, and the pressure roller is pressed against the conveyance roller by pressing the pressure plate springs to both ends of the pressure roller shaft that supports the pressure roller. The most important feature of the sheet conveying apparatus is a sheet conveying apparatus in which a double-sided tape is affixed to a contact portion of the lower surface of the pressure plate spring with the pressure roller shaft.

本発明では、加圧ローラ軸を加圧板バネに固定し、回転させない構成を採用することで、所期の目的を達成することができる。   In the present invention, the intended purpose can be achieved by adopting a configuration in which the pressure roller shaft is fixed to the pressure leaf spring and is not rotated.

以下、本発明の実施の形態を図面に従って説明する。なお、従来例と同一個所には同一符号を付して重複する説明は省略する。図１は本発明の第１の実施形態に係る用紙搬送装置の構成図であり、図１（１）は加圧ローラ部の正面図、（２）は同じく斜視図である。
加圧板バネ４の先端部中央に長手方向の２本のスリットを入れて、両スリット間に形成される矩形部分を下方に折り曲げて折り曲げ部４−１を形成する。そして、この折り曲げ部４−１の上面と、その両側方に張り出した加圧板バネ４の張出し部分４−２の底面との間に加圧ローラ軸３を挟み込むと共に、折り曲げ部４−１の上面（加圧ローラ軸３との当接面）に両面テープ６を貼付する。このような構成にすることで、加圧ローラ軸３が両面テープ６の粘着面によって固定されるため、加圧ローラ軸３を加圧板バネ４に固定することができる。
図２は本発明の第２の実施形態に係る用紙搬送装置の正面図である。加圧板バネ４の下面における加圧ローラ軸３との当接部に両面テープ６を貼付する。このような構成にすることで、加圧ローラ軸３を加圧板バネ４に固定することができる。この例に係る加圧板バネ４は、折り曲げ部を有しない単なる平板であってよい。
図３は用紙搬送装置の参考例を示す構成図であり、（１）は加圧ローラ部の正面図、（２）は同じく斜視図である。図１と同様に、加圧板バネ４の先端部中央に長手方向の２本のスリットを入れて下方に折り曲げ部４−１を設ける。
そして、この折り曲げ部４−１の上面とその両側方に位置する加圧板バネ４の張出し部４−２の底面との間に加圧ローラ軸３を挟み込む構成とすると共に、加圧ローラ軸３の端部（加圧板バネ当接部）に一対のＤカット形状部３−１を形成する。このようにすると加圧ローラ軸３の平面が加圧板バネ４と当接することになり、加圧ローラ軸３を加圧板バネ４に固定することができる。
図４は上記参考例の変形例に係る用紙搬送装置の正面図である。この変形例では加圧ローラ軸３の端部の一箇所にのみＤカット形状部３−１を形成している。このような簡易な構成でも加圧ローラ軸３を加圧板バネ４に固定することができる。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, the same code | symbol is attached | subjected to the same location as a prior art example, and the overlapping description is abbreviate | omitted. FIG. 1 is a configuration diagram of a sheet conveying apparatus according to a first embodiment of the present invention. FIG. 1A is a front view of a pressure roller unit, and FIG. 1B is a perspective view of the same.
Two slits in the longitudinal direction are inserted in the center of the tip of the pressure leaf spring 4, and a rectangular portion formed between both slits is bent downward to form a bent portion 4-1. The pressure roller shaft 3 is sandwiched between the upper surface of the bent portion 4-1 and the bottom surface of the protruding portion 4-2 of the pressure leaf spring 4 protruding on both sides thereof, and the upper surface of the bent portion 4-1. A double-sided tape 6 is affixed to (the contact surface with the pressure roller shaft 3). With this configuration, the pressure roller shaft 3 is fixed by the adhesive surface of the double-sided tape 6, so that the pressure roller shaft 3 can be fixed to the pressure plate spring 4.
FIG. 2 is a front view of a sheet conveying apparatus according to the second embodiment of the present invention. A double-sided tape 6 is affixed to the contact portion of the lower surface of the pressure plate spring 4 with the pressure roller shaft 3. With this configuration, the pressure roller shaft 3 can be fixed to the pressure plate spring 4. The pressure leaf spring 4 according to this example may be a simple flat plate that does not have a bent portion.
Figure 3 is a block diagram showing a reference example of the paper transporting apparatus, (1) is a front view of the pressing roller section, (2) which is also a perspective view. As in FIG. 1, two slits in the longitudinal direction are inserted in the center of the tip of the pressure leaf spring 4, and a bent portion 4-1 is provided below.
The pressure roller shaft 3 is sandwiched between the upper surface of the bent portion 4-1 and the bottom surface of the overhanging portion 4-2 of the pressure leaf spring 4 located on both sides thereof, and the pressure roller shaft 3 A pair of D-cut shaped portions 3-1 are formed at the end portions (pressure plate spring contact portions). In this way, the plane of the pressure roller shaft 3 comes into contact with the pressure plate spring 4, and the pressure roller shaft 3 can be fixed to the pressure plate spring 4.
FIG. 4 is a front view of a sheet conveying apparatus according to a modification of the reference example . In this modification, the D-cut shape portion 3-1 is formed only at one end portion of the pressure roller shaft 3. Even with such a simple configuration, the pressure roller shaft 3 can be fixed to the pressure plate spring 4.

本発明の第１の実施形態に係る用紙搬送装置の構成図である。1 is a configuration diagram of a paper transport device according to a first embodiment of the present invention. 本発明の第２の実施形態に係る用紙搬送装置の構成図である。It is a block diagram of the paper conveying apparatus which concerns on the 2nd Embodiment of this invention. 用紙搬送装置の参考例を示す構成図である。FIG. 10 is a configuration diagram illustrating a reference example of a sheet conveying device . 図３の参考例の変形例に係る用紙搬送装置の構成図である。It is a block diagram of the paper conveying apparatus which concerns on the modification of the reference example of FIG. 一般的な用紙搬送装置の正面図である。It is a front view of a general paper conveyance device. 図５の加圧ローラ部の斜視図である。It is a perspective view of the pressure roller part of FIG.

符号の説明Explanation of symbols

１ 搬送ローラ
２ 加圧ローラ
３ 加圧ローラ軸
３−１ Ｄカット形状部
４ 加圧板バネ
４−１ 折り曲げ部
５ 板バネ固定部
６ 両面テープ DESCRIPTION OF SYMBOLS 1 Conveyance roller 2 Pressure roller 3 Pressure roller shaft 3-1 D cut shape part 4 Pressure leaf spring 4-1 Bending part 5 Leaf spring fixing part 6 Double-sided tape

Claims (2)

搬送ローラと加圧ローラとを備え、加圧ローラを支持する加圧ローラ軸の両端部に、加圧板バネを圧接することにより搬送ローラに加圧ローラを圧接する用紙搬送装置において、加圧板バネの先端部に形成した折り曲げ部の上面と、その両側方に設けた加圧板バネの張出し部底面との間に加圧ローラ軸を挟み込むと共に、折り曲げ部の上面に両面テープを貼付したことを特徴とする用紙搬送装置。   A pressure plate spring in a paper conveyance device comprising a conveyance roller and a pressure roller, wherein the pressure roller is pressed against both ends of a pressure roller shaft that supports the pressure roller by pressing the pressure roller against the conveyance roller. The pressure roller shaft is sandwiched between the upper surface of the bent portion formed at the tip of the rim and the bottom surface of the overhang portion of the pressure plate spring provided on both sides thereof, and a double-sided tape is attached to the upper surface of the bent portion. Paper transport device. 搬送ローラと加圧ローラとを備え、加圧ローラを支持する加圧ローラ軸の両端部に、加圧板バネを圧接することにより搬送ローラに加圧ローラを圧接する用紙搬送装置において、加圧板バネの下面における加圧ローラ軸との当接部に両面テープを貼付したことを特徴とする用紙搬送装置。   A pressure plate spring in a paper conveyance device comprising a conveyance roller and a pressure roller, wherein the pressure roller is pressed against both ends of a pressure roller shaft that supports the pressure roller by pressing the pressure roller against the conveyance roller. A sheet conveying apparatus characterized in that a double-sided tape is affixed to a contact portion of the lower surface of the sheet with the pressure roller shaft.
JP2004038009A 2004-02-16 2004-02-16 Paper transport device Expired - Fee Related JP4204995B2 (en)

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JP2004038009A JP4204995B2 (en) 2004-02-16 2004-02-16 Paper transport device

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JP2004038009A JP4204995B2 (en) 2004-02-16 2004-02-16 Paper transport device

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JP2005225651A JP2005225651A (en) 2005-08-25
JP4204995B2 true JP4204995B2 (en) 2009-01-07

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011236033A (en) * 2010-05-12 2011-11-24 Murata Machinery Ltd Paper transporting apparatus, paper feeding unit, and image forming apparatus
JP6191314B2 (en) * 2013-08-02 2017-09-06 セイコーエプソン株式会社 Medium conveying apparatus and recording apparatus
JP2021123478A (en) * 2020-02-06 2021-08-30 キヤノン株式会社 Sheet conveyance device and image reading device

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