JP2638216B2 - Paper feed mechanism - Google Patents
Paper feed mechanismInfo
- Publication number
- JP2638216B2 JP2638216B2 JP21569989A JP21569989A JP2638216B2 JP 2638216 B2 JP2638216 B2 JP 2638216B2 JP 21569989 A JP21569989 A JP 21569989A JP 21569989 A JP21569989 A JP 21569989A JP 2638216 B2 JP2638216 B2 JP 2638216B2
- Authority
- JP
- Japan
- Prior art keywords
- paper feed
- friction
- feed roller
- friction member
- pad
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、フアクシミリや画像形成装置において原
稿、転写用紙を供給する給紙機構に関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a paper feed mechanism for feeding a document and a transfer sheet in a facsimile or an image forming apparatus.
第２図は従来のフアクシミリ等の一般的な原稿の給紙
機構である。１は用紙を送り出すための給紙ローラで、
その表面の一部には、摩擦パッド２の先端部分が接して
いる。上記摩擦パッド２は用紙のさばきと給送を行うべ
く、所望の摩擦係数を有する部材からなり、その後端は
支持部材８で支持されるとともに、先端部は圧縮バネ５
により給紙ローラ１との間に好適な押圧力が付与されて
いる。また、原稿を載置するガイド板４の先端側は原稿
７を案内すべく給紙ローラ１の周面に沿うように延設さ
れている。ガイド板４と摩擦パッド２は所望の角度を有
して配設されており、給紙ローラ１を回転させてガイド
板４の原稿７を送ると、原稿７の先端部が摩擦パッド２
に当接して順次さばきが行われ、最下位の原稿が摩擦パ
ッド２と給紙ローラ１の間を通ってプラテンローラ対12
に送られる。FIG. 2 shows a general document feed mechanism for a conventional facsimile or the like. 1 is a paper feed roller for sending out the paper,
The tip of the friction pad 2 is in contact with a part of the surface. The friction pad 2 is made of a member having a desired coefficient of friction in order to separate and feed the paper. The rear end of the friction pad 2 is supported by a support member 8 and the front end is a compression spring 5.
Thus, a suitable pressing force is applied to the sheet feeding roller 1. The guide plate 4 on which the original is placed is extended along the peripheral surface of the paper feed roller 1 to guide the original 7. The guide plate 4 and the friction pad 2 are arranged at a desired angle. When the paper feed roller 1 is rotated to feed the original 7 on the guide plate 4, the leading end of the original 7 is moved to the friction pad 2.
, The lowermost document passes between the friction pad 2 and the paper feed roller 1, and the platen roller pair 12.
Sent to
従来の給紙機構では、さばきを行うに際して、重送を
防ぐためには摩擦係数の高い摩擦部材を用いることが望
まれるが、用紙が給紙ローラ１と摩擦パッド２の間を通
過する際、不快な摩擦音が発生していた。一方、摩擦音
をなくすためには摩擦係数のより低い摩擦部材を使用す
る必要があるが、原稿の重送を生じるという相反する問
題点を有しており、このため従来はいずれか一方の欠点
を残したまま所定の摩擦係数を有する部材でパッドを形
成していた。In the conventional paper feeding mechanism, it is desirable to use a friction member having a high coefficient of friction in order to prevent double feeding in performing the separation. However, when the paper passes between the paper feeding roller 1 and the friction pad 2, it is uncomfortable. Fricative noise was generated. On the other hand, in order to eliminate the friction noise, it is necessary to use a friction member having a lower friction coefficient, but there is a conflicting problem that double feeding of the original occurs, and therefore, in the related art, either one of the disadvantages has been used. The pad was formed with a member having a predetermined coefficient of friction while remaining.
本発明は重送や摩擦音がなく安定して原稿の給紙を行
うことのできる給紙機構を提供することを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a paper feeding mechanism capable of feeding a document stably without double feeding or frictional noise.
本発明は用紙を給紙するための給紙ローラと、この給
紙ローラに部分的に圧接する摩擦パッドによって構成さ
れる給紙機構において、上記摩擦パッドが給紙ローラと
接触する面に低摩擦部材を配置し、同一面側残部に高摩
擦部材を配置して構成されるものである。The present invention provides a paper feed mechanism including a paper feed roller for feeding paper and a friction pad that partially presses against the paper feed roller, wherein the friction pad has low friction on a surface that comes into contact with the paper feed roller. A member is arranged, and a high friction member is arranged in the remaining portion on the same surface side.
本発明によれば、給紙ローラを回転させると、高摩擦
部材と用紙が当接し、この高摩擦部材と用紙間の摩擦に
より用紙のさばきが充分に行なわれ、次にさばかれた用
紙の内、最下位の用紙が低摩擦部材と給紙ローラの間を
音を発生することなく給送される。According to the present invention, when the sheet feeding roller is rotated, the high friction member comes into contact with the sheet, and the friction between the high friction member and the sheet sufficiently separates the sheet. The lowermost sheet is fed between the low friction member and the sheet feeding roller without generating a sound.
以下、本発明に基く一実施例を図面を参照しながら説
明する。Hereinafter, an embodiment based on the present invention will be described with reference to the drawings.
第１図は本発明にかかる給紙機構の側断面図である。
１は円筒状の形状の給紙ローラで、不図示の駆動源に連
結された軸11を中心に回転するようになっている。FIG. 1 is a side sectional view of a sheet feeding mechanism according to the present invention.
Reference numeral 1 denotes a cylindrical paper feed roller which rotates around a shaft 11 connected to a drive source (not shown).
この給紙ローラ１の周面一部には摩擦パッド２の先端
部分が圧接している。摩擦パッド２は原稿のさばきを行
うべく所定の摩擦係数を有する摩擦部材から成ってお
り、その後端は支持部材８で支持されている。給紙ロー
ラ１に圧接する摩擦パッド２の先端部分には摩擦係数の
小さい、例えばEPDM等の低摩擦部材10が取り付けてあ
り、同じく給紙ローラ１と対向する面側で原稿７の先端
部と摩擦パッド２が当接する残りの部分には上記低摩擦
部材10と連続的につながるように摩擦係数の大きい、例
えば天然ゴム等の高摩擦部材９から成っている。A tip portion of a friction pad 2 is in pressure contact with a part of the peripheral surface of the paper feed roller 1. The friction pad 2 is made of a friction member having a predetermined coefficient of friction in order to separate a document, and a rear end thereof is supported by a support member 8. A low friction member 10 having a small coefficient of friction, for example, EPDM, is attached to the front end portion of the friction pad 2 which is pressed against the paper feed roller 1. The remaining portion where the friction pad 2 abuts is made of a high friction member 9 having a large friction coefficient, such as natural rubber, so as to be continuously connected to the low friction member 10.
４は原稿７を載置するためのガイド板であって、その
先端部分は給紙ローラ１の周面形状に沿って原稿７を案
内すべく断面円弧状に延設されている。ガイド板４と摩
擦パッド２は原稿７のさばきが好適に行なえるよう所望
の角度を有して配設されている。前記摩擦パッド２は支
持部材８の延長上に設置されたパッドホルダー３に取り
付けられている。６はパッドホルダー受けで、その下面
適所の凸部とパッドホルダー３の上面適所の凸部間には
圧縮バネ５が介設されている。従って、圧縮バネ５によ
って給紙ローラ１と摩擦パッド２の接触面には適圧がか
かつている。給紙ローラ１と摩擦パッド２の間を通って
送られる用紙は、さらにプラテンローラ対12でフアクシ
ミリ内部に搬送される構成となっている。Reference numeral 4 denotes a guide plate on which the document 7 is placed. The leading end of the guide plate 4 extends in an arc-shaped cross section to guide the document 7 along the peripheral surface shape of the paper feed roller 1. The guide plate 4 and the friction pad 2 are arranged at a desired angle so that the document 7 can be properly separated. The friction pad 2 is attached to a pad holder 3 installed on an extension of the support member 8. Reference numeral 6 denotes a pad holder receiver, and a compression spring 5 is interposed between a convex portion at an appropriate position on the lower surface thereof and a convex portion at an appropriate position on the upper surface of the pad holder 3. Therefore, an appropriate pressure is applied to the contact surface between the paper feed roller 1 and the friction pad 2 by the compression spring 5. The paper fed between the paper feed roller 1 and the friction pad 2 is further transported inside the facsimile by the platen roller pair 12.
このように構成された給紙機構では、先ず、ガイド板
４上に原稿７を載置して給紙ローラ１を回転させると、
原稿７はガイド板４に沿って摩擦パッド２側に摺動し、
原稿７の先端部が摩擦パッド２の高摩擦部材９に当接す
る。In the paper feed mechanism configured as described above, first, when the document 7 is placed on the guide plate 4 and the paper feed roller 1 is rotated,
The original 7 slides along the guide plate 4 toward the friction pad 2,
The leading end of the document 7 contacts the high friction member 9 of the friction pad 2.
高摩擦部材９はガイド板４に対して傾斜しているので
送られる原稿７は高摩擦部材９に順に順に当接する。Since the high friction member 9 is inclined with respect to the guide plate 4, the original 7 to be fed comes into contact with the high friction member 9 in order.
高摩擦部材９によりさばかれた後、原稿７の最下位の
用紙が一枚だけ給紙ローラ１の回転に伴って低摩擦部材
10まで送られ、給紙に給紙ローラ１と低摩擦部材10の間
を通ってレジストローラ対12へ送られる。この際、摩擦
パッド２と給紙ローラ１が接触する部位は低摩擦部材10
を用いているため原稿が滑らかに流れることとなる。After being separated by the high friction member 9, only one sheet of the lowermost sheet of the original 7 is reduced by the rotation of the paper feed roller 1.
The paper is then fed to the registration roller pair 12 through the space between the paper feed roller 1 and the low friction member 10 for paper feeding. At this time, the portion where the friction pad 2 and the paper feed roller 1 contact each other is a low friction member 10.
, The document flows smoothly.
このようにして給紙ローラ１の回転に伴って高摩擦部
材９でさばかれた原稿は低摩擦部材10に接して給送され
る間、摩擦音を発生せず適切な圧力で給紙ローラ１に圧
接して送り出される。The document separated by the high friction member 9 in accordance with the rotation of the paper feed roller 1 in this manner does not generate a friction sound and is applied to the paper feed roller 1 with an appropriate pressure while being fed in contact with the low friction member 10. It is sent out by pressing.
第３図は摩擦パッドの他の実施例を示すものである。 FIG. 3 shows another embodiment of the friction pad.
第３図（ａ）は前記実施例の摩擦パッドと逆の構成を
成すものである。すなわち、低摩擦部材10の底部にＬ字
状の嵌合溝13を設け、ここに高摩擦部材９を嵌合させた
構成となっている。FIG. 3 (a) shows a structure opposite to the friction pad of the above embodiment. That is, an L-shaped fitting groove 13 is provided at the bottom of the low friction member 10 and the high friction member 9 is fitted therein.
第３図（ｂ）は低摩擦部材10の一端に凹部14を設け、
この凹部14に嵌入する凸部15を高摩擦部材９の一端に設
け、凹部14に凸部15を嵌入して接合させたものである。FIG. 3 (b) provides a recess 14 at one end of the low friction member 10,
The convex portion 15 fitted into the concave portion 14 is provided at one end of the high friction member 9, and the convex portion 15 is fitted into the concave portion 14 and joined.
第３図（ｃ）はシート状の高摩擦部材９、低摩擦部材
10の一端16をそれぞれそのまま接合した構成となってい
る。FIG. 3C shows a sheet-like high friction member 9 and a low friction member.
It has a configuration in which one end 16 of 10 is joined as it is.
なお、第３図中の（ｂ），（ｃ）の接合の形状は第３
図のものに限らず、摩擦パッドの底部でローラ１と接す
る部分を低摩擦部材10で，原稿７と当接する部分を高摩
擦部材９で形成し、両部材が連続的、かつ滑らかにつな
がっていれば、接合の仕方は問わない。The shape of the joints (b) and (c) in FIG.
The low friction member 10 and the high friction member 9 at the bottom of the friction pad contact the roller 1 at the bottom of the friction pad, and the two members are continuously and smoothly connected. It does not matter how to join.
このように、本発明に係る給紙機構では、摩擦パッド
を、給紙ローラと接触する面に低摩擦部材を、同一面側
の残部に高摩擦部材を用いて形成しているため原稿が高
摩擦部材と当接するところでは原稿のさばきが好適に行
われ、さばかれた原稿と低摩擦部材が接触するところで
は原稿の給送がスムーズに行われる。As described above, in the paper feed mechanism according to the present invention, since the friction pad is formed by using the low friction member on the surface that comes into contact with the paper feed roller and the high friction member is used on the remaining portion on the same surface side, the original is high. The document is suitably separated where the friction member is in contact, and the document is smoothly fed where the separated document and the low friction member are in contact.
従って、重送も、不快な摩擦音もなく安定した原稿の
給紙が行なえる。Therefore, it is possible to feed a document stably without double feeding or unpleasant friction noise.
第１図は本発明に係るフアクシミリの給紙機構の側断面
図、第２図は従来のフアクシミリの給紙機構の側断面
図、第３図（ａ）〜（ｃ）は摩擦パッドの他の実施例を
示す断面図である。 １……給紙ローラー、２……摩擦パッド、３……パッド
ホルダー、４……ガイド板、５……圧縮バネ、６……パ
ッドホルダー受け、７……原稿FIG. 1 is a side sectional view of a facsimile sheet feeding mechanism according to the present invention, FIG. 2 is a side sectional view of a conventional facsimile sheet feeding mechanism, and FIGS. 3 (a) to 3 (c) are other friction pads. It is sectional drawing which shows an Example. DESCRIPTION OF SYMBOLS 1 ... Feed roller, 2 ... Friction pad, 3 ... Pad holder, 4 ... Guide plate, 5 ... Compression spring, 6 ... Pad holder receiver, 7 ... Original
───────────────────────────────────────────────────── フロントページの続き (72)発明者 山口 義文 大阪府大阪市中央区玉造１丁目２番28号 三田工業株式会社内 (56)参考文献 実開 昭59−100742（ＪＰ，Ｕ) 実開 昭52−133641（ＪＰ，Ｕ) 実開 昭59−54442（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Yoshifumi Yamaguchi 1-2-2, Tamazo, Chuo-ku, Osaka-shi, Osaka Inside Mita Kogyo Co., Ltd. Showa 52-133361 (JP, U) Actually open Showa 59-54442 (JP, U)
Claims (1)
給紙ローラに部分的に圧接する摩擦パッドによって構成
される給紙機構において、上記摩擦パッドが給紙ローラ
と接触する面に低摩擦部材が配置され、同一面側残部に
高摩擦部材が配置されて成ることを特徴とする給紙機
構。In a paper feed mechanism comprising a paper feed roller for feeding paper and a friction pad partially pressed against the paper feed roller, the friction pad is provided on a surface in contact with the paper feed roller. A sheet feeding mechanism, wherein a low friction member is arranged, and a high friction member is arranged on the remaining portion on the same surface side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21569989A JP2638216B2 (en) | 1989-08-21 | 1989-08-21 | Paper feed mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21569989A JP2638216B2 (en) | 1989-08-21 | 1989-08-21 | Paper feed mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0379530A JPH0379530A (en) | 1991-04-04 |
| JP2638216B2 true JP2638216B2 (en) | 1997-08-06 |
Family
ID=16676696
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21569989A Expired - Fee Related JP2638216B2 (en) | 1989-08-21 | 1989-08-21 | Paper feed mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2638216B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4495875B2 (en) * | 2001-03-16 | 2010-07-07 | 株式会社リコー | Paper feeder |
| JP3736528B2 (en) | 2002-12-27 | 2006-01-18 | ブラザー工業株式会社 | Paper feeding device and image forming apparatus |
-
1989
- 1989-08-21 JP JP21569989A patent/JP2638216B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0379530A (en) | 1991-04-04 |
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