JPH03284561A - Double feed-preventing rubber member in paper feeder - Google Patents
Double feed-preventing rubber member in paper feederInfo
- Publication number
- JPH03284561A JPH03284561A JP2085112A JP8511290A JPH03284561A JP H03284561 A JPH03284561 A JP H03284561A JP 2085112 A JP2085112 A JP 2085112A JP 8511290 A JP8511290 A JP 8511290A JP H03284561 A JPH03284561 A JP H03284561A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- paper
- rubber member
- coefficient
- double feed
- 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
- 229920001971 elastomer Polymers 0.000 title claims abstract description 73
- 239000005060 rubber Substances 0.000 title claims abstract description 73
- 230000003068 static effect Effects 0.000 claims abstract description 10
- 239000000203 mixture Substances 0.000 claims abstract description 6
- 244000145845 chattering Species 0.000 abstract 2
- 239000007799 cork Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 230000000052 comparative effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002131 composite material Substances 0.000 description 2
- 238000004132 cross linking Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920002681 hypalon Polymers 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229920000379 polypropylene carbonate Polymers 0.000 description 2
- 238000002300 pressure perturbation calorimetry Methods 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229920000181 Ethylene propylene rubber Polymers 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000002216 antistatic agent Substances 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000003431 cross linking reagent Substances 0.000 description 1
- 229920001973 fluoroelastomer Polymers 0.000 description 1
- 210000002816 gill Anatomy 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 239000010893 paper waste Substances 0.000 description 1
- 150000002978 peroxides Chemical class 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001007 puffing effect Effects 0.000 description 1
- 239000012744 reinforcing agent Substances 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920003051 synthetic elastomer Polymers 0.000 description 1
- 239000005061 synthetic rubber Substances 0.000 description 1
- 238000004073 vulcanization Methods 0.000 description 1
Landscapes
- Paper Feeding For Electrophotography (AREA)
- Sheets, Magazines, And Separation Thereof (AREA)
- Facsimiles In General (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、普通紙複写機（以下ｒＰＰＣＪと略す）、
ファクシミリ等の給紙装置に用いられる重送防止用ゴム
部材に関するものである。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a plain paper copying machine (hereinafter abbreviated as rPPCJ),
The present invention relates to a rubber member for preventing double feeding used in paper feeding devices such as facsimiles.
ＰＰＣやファクシミリ等の給紙装置では、従来から、紙
が２枚以上重なって送り込まれないよう、重４防止手段
が講じられている。例えば、第１図に示すように、給紙
ローラ１に対して重送防止用のゴム板２を対設し、給紙
ローラ１に沿って紙３が２枚以上送り込まれた場合には
、上記ゴム板２によって、２枚目以下の祇３の進行を妨
げるようにしている（捌きパッド方式）。あるいは、第
２図に示すように、給紙ローラＩと引っ張りローラ対４
．４ａの間に設けられる正転ローラ５に、重送防止用の
ゴムローラ６を対設し、このゴムローラ６によって余分
に送られてきた紙３の進行を妨げるようにしている（逆
転ローラ捌き方式）。2. Description of the Related Art Conventionally, in paper feeding devices such as PPCs and facsimiles, measures have been taken to prevent stacking of two or more sheets of paper from being fed. For example, as shown in FIG. 1, if a rubber plate 2 for preventing double feeding is provided opposite the paper feed roller 1, and two or more sheets of paper 3 are fed along the paper feed roller 1, The rubber plate 2 prevents the progression of the second and subsequent pieces of gills 3 (separation pad method). Alternatively, as shown in FIG. 2, the paper feed roller I and the tension roller pair 4
．． A rubber roller 6 for preventing double feeding is provided opposite to the forward rotating roller 5 provided between the paper sheets 4a and 6, so that the rubber roller 6 prevents the excess paper 3 from being fed (reverse roller sorting method). .
このような重送防止用のゴム板２やゴムローラ６に用い
られるゴム部材としては、−１に、天然ゴム、スチレン
−ブタジェンゴム、ブチルゴム。Rubber members used for the rubber plate 2 and rubber roller 6 for preventing double feeding include natural rubber, styrene-butadiene rubber, and butyl rubber.
ハイパロン（クロロスルホン化ポリエチレン）。Hypalon (chlorosulfonated polyethylene).
エチレン−プロピレンゴム等の合成ゴム材料や、ポリウ
レタン等のウレタン材料等が使用されており、ゴム状弾
性体特有の摩擦特性（粘着によるもの８０％と変形に伴
うヒステリシス損失２０％とを併せたものが摩擦力とな
っている）によって、余分な祇３の進行を妨げる。しか
し、このような摩擦特性のゴムからなるゴム部材では、
ゴムと紙とが密着して離れる際に、静摩擦力と動摩擦力
とが交互に発生し、両摩擦力の差が大きいためスティッ
クスリップ現象が生じる。そして、その振動によってい
わゆる「鳴き」 （不快なきしみ音）が発生し、問題と
なっている。Synthetic rubber materials such as ethylene-propylene rubber and urethane materials such as polyurethane are used, and the friction characteristics unique to rubber-like elastic bodies (80% due to adhesion and 20% hysteresis loss due to deformation) are used. (which acts as a frictional force) prevents the excess movement of the G3. However, in rubber members made of rubber with such frictional characteristics,
When the rubber and paper come into close contact with each other and separate, static frictional force and dynamic frictional force are generated alternately, and the stick-slip phenomenon occurs because the difference between the two frictional forces is large. This vibration causes so-called "squeaks" (unpleasant squeaks), which has become a problem.
そこで、この「鳴き」の防止策として、ゴム中にコルク
粒子を混入させて紙とゴムとの密着性を弱め、静−動摩
擦力の差を少なくしてスティックスリップ現象の発生を
防止することが提案され一部で実用化されている（特公
昭６２−５６０６１号公報）。Therefore, as a measure to prevent this "squeal", it is possible to mix cork particles into the rubber to weaken the adhesion between the paper and the rubber, reduce the difference in static and kinetic friction, and prevent the stick-slip phenomenon from occurring. It has been proposed and put into practical use in some cases (Japanese Patent Publication No. 56061/1983).
しかしながら、上記コルク粒子の混入によってスティッ
クスリップ現象はある程度解消するものの、使用の継続
によりコルク粒子よりも軟質なゴムの表面が摩耗して、
第３図に示すように、ゴム部分８からコルク粒子７が突
出するようになる。However, although the stick-slip phenomenon is resolved to some extent by incorporating the cork particles, the surface of the rubber, which is softer than the cork particles, wears out with continued use.
As shown in FIG. 3, cork particles 7 come to protrude from the rubber portion 8.
このため、この突出部分に紙が引っ掛かって紙詰まり等
のトラブルが生じやすくなる。このように、コルク粒子
７の混入によっても、給紙に伴うトラブルを完全に解消
することができず、その解決が望まれていた。For this reason, troubles such as paper jams are likely to occur due to paper being caught in this protruding portion. As described above, even with the contamination of cork particles 7, it is not possible to completely eliminate the troubles associated with paper feeding, and a solution has been desired.
この発明は、このような事情に鑑みなされたもので、紙
とゴムの密着による「鳴き」の発生を防止し、かつ長期
にわたってトラブルのない円滑な給紙を維持することの
できる重送防止用ゴム部材の提供をその目的とする。This invention was made in view of these circumstances, and is a double-feed prevention device that prevents the occurrence of "squeak" due to the close contact between paper and rubber, and maintains trouble-free and smooth paper feeding over a long period of time. Its purpose is to provide rubber members.
上記の目的を達成するため、この発明の給紙装置におけ
る重送防止用ゴム部材は、全体が、静摩擦係数と動摩擦
係数の差の小さいゴムを主成分とするゴム組成物によっ
て構成され、かつその表面が粗面化されて紙との摩擦係
数が０．７〜２．５に設定されているという構成をとる
。In order to achieve the above object, the rubber member for preventing double feeding in the paper feeding device of the present invention is entirely composed of a rubber composition whose main component is rubber with a small difference between the coefficient of static friction and the coefficient of dynamic friction. The surface is roughened and the coefficient of friction with paper is set at 0.7 to 2.5.
すなわち、この発明の給紙装置における重送防止用ゴム
部材は、コルク粒子のような異物を混入して紙とゴムと
の密着を阻止するのではなく、ゴム自体の改良を図った
もので、紙との密着性に乏しいような特殊なゴム、すな
わち静摩擦係数と動摩擦係数の差の小さいゴムを選定し
て用い、しかもその表面を粗面化することにより「鳴き
」を防止するようにしたものである。In other words, the rubber member for preventing double feeding in the paper feeding device of the present invention does not incorporate foreign substances such as cork particles to prevent the paper from adhering to the rubber, but rather improves the rubber itself. A special rubber that has poor adhesion to paper, that is, a rubber with a small difference between the coefficient of static friction and the coefficient of dynamic friction, is selected and used, and its surface is roughened to prevent "squealing". It is.
つぎに、この発明の詳細な説明する。Next, this invention will be explained in detail.
この発明の給紙装置における重送防止用ゴム部材は、全
体が静摩擦係数と動摩擦係数の差の小さいゴムを主成分
とするゴム組成物によって構成される。The rubber member for preventing double feeding in the paper feeding device of the present invention is entirely composed of a rubber composition containing a rubber having a small difference between the coefficient of static friction and the coefficient of dynamic friction as a main component.
上記ゴム組成物の主成分である「静摩擦係数と動摩擦係
数の差の小さいゴム」とは、静−動摩擦係数の差がＯ〜
０．５の範囲内にあるものを意味し、従来から重送防止
用ゴム部材に用いられているゴムに比べ紙への密着力が
弱く、滑らかなものである。このようなゴムとしては、
シリコン−エチレンプロピレン混合ゴム（ＳＥＰ）、
シリコンゴム、フッ素ゴム等があげられ、なかでも、特
にＳＥＰが好適である。なお、上記ゴムは、単品で用い
ても２種以上を混合してもよい。"Rubber with a small difference between the static friction coefficient and the kinetic friction coefficient", which is the main component of the above rubber composition, means that the difference between the static friction coefficient and the kinetic friction coefficient is O~
0.5, which means that it has a weaker adhesion to paper and is smoother than rubber conventionally used in rubber members for preventing double feeding. For such rubber,
silicone-ethylene propylene mixed rubber (SEP),
Examples include silicone rubber, fluororubber, etc., and among them, SEP is particularly suitable. The above rubbers may be used alone or in combination of two or more.
また、上記ゴム組成物には、上記静−動摩擦係数の差の
小さいゴムの他、必要に応じて架橋剤（加硫剤）、加硫
促進剤、補強剤、可塑剤、帯電防止剤等の添加剤が適宜
配合される。In addition to the rubber having a small difference in static-dynamic coefficient of friction, the rubber composition may contain a crosslinking agent (vulcanizing agent), a vulcanization accelerator, a reinforcing agent, a plasticizer, an antistatic agent, etc. as necessary. Additives are appropriately blended.
この発明のゴム部材は、上記ゴム組成物材料を用い、例
えばつぎのようにして製造することができる。すなわち
、上記ゴム組成物材料を所定割合で配合し、均一に混練
する。そして、パーオキサイド架橋等によってゴム部分
を三次元的に架橋して目的とするゴム部材を得ることが
できる。このゴム部材は、板状に成形して第１図に示す
ような重送防止用ゴム板２として用いるようにしてもよ
いし、あるいは金型によりロール芯金表面に架橋したゴ
ム層を形成させることにより、第２図に示すような重送
防止用ゴムロール６として用いるようにしてもよい。た
だし、この発明では、このようにして得られたゴム部材
の紙と接する表面を、パフ掛けや研磨等の仕上げ加工に
よって粗面化することが必要である。すなわち、紙と接
する表面を粗面化することにより、−屑紙への密着性を
低下させてスティックスリップ現象を防止し、「鳴き」
を解消することができる。The rubber member of the present invention can be manufactured using the above-mentioned rubber composition material, for example, in the following manner. That is, the above-mentioned rubber composition materials are blended in a predetermined ratio and kneaded uniformly. The desired rubber member can then be obtained by three-dimensionally crosslinking the rubber portion using peroxide crosslinking or the like. This rubber member may be formed into a plate shape and used as a rubber plate 2 for preventing double feeding as shown in Fig. 1, or a crosslinked rubber layer may be formed on the surface of the roll core metal using a mold. Accordingly, it may be used as a rubber roll 6 for preventing double feeding as shown in FIG. However, in this invention, it is necessary to roughen the surface of the thus obtained rubber member that comes into contact with the paper by finishing processing such as puffing or polishing. In other words, by roughening the surface that comes into contact with paper, it reduces the adhesion to waste paper, prevents stick-slip phenomenon, and reduces "squeal".
can be resolved.
このようにして得られた重送防止用ゴム板あるいは重送
防止用ゴムローラを組み込んだ給紙装置は、紙送り込み
時に「鳴き」が生じず、また、紙詰まり等のトラブルも
生じない。そして、この効果は、長期の使用によっても
薄れることがない。A paper feeding device incorporating the rubber plate for preventing double feeding or the rubber roller for preventing double feeding obtained in this manner does not generate "squeak" when feeding paper, and does not cause troubles such as paper jams. This effect does not fade even with long-term use.
つぎに、実施例を比較例と併せて説明する。Next, examples will be described together with comparative examples.
〔実施例１〜３、比較例１，２〕
下記の表に示す材料を用い、前記方法に従って重送防止
用ゴムロール（第２図参照）を作製した。そして、この
ゴムロールの未使用時の摩擦係数を測定するとともに、
実際にＰＰＣに組み込んで１０万枚の複写に使用した時
点で再度摩擦係数を測定した。また、この１０万枚の複
写を行う間に何回「鳴き」が発生するかをカウントし、
「鳴き」発生率を算出した。これらの結果を下記の表に
示す。[Examples 1 to 3, Comparative Examples 1 and 2] Rubber rolls for preventing double feeding (see Fig. 2) were produced using the materials shown in the table below and according to the method described above. Then, we measured the friction coefficient of this rubber roll when it was not in use, and
The coefficient of friction was measured again after it was actually incorporated into a PPC and used to make 100,000 copies. In addition, we counted how many times the "squeal" occurred while making these 100,000 copies,
The incidence of "squeak" was calculated. These results are shown in the table below.
（以下余白）
上記の結果から、実施測高はいずれも「鳴き」が効果的
に防止されていることがわかる。また、摩擦係数につい
ても、未使用時、１０万回複写後ともに好ましい値であ
ることがわかる。これに対し、比較測高は、ともに「鳴
き」が頻繁に発生している。(See margin below) From the above results, it can be seen that "squeal" was effectively prevented in all of the implemented height measurements. Furthermore, it can be seen that the coefficient of friction has a preferable value both when unused and after 100,000 copies. On the other hand, "squeaks" frequently occur in both comparative height measurements.
以上のように、この発明の給紙装置における重送防止用
ゴム部材は、全体が静−動摩擦係数の差の小さい特殊な
ゴムによって構成され、しかもこのゴム表面が仕上げ加
工によって粗面化されているため、給紙装置に組み込ん
だ場合に、ゴム部材と紙との密着力が弱く、「鳴き」が
生じないという優れた効果を奏する。そして、この効果
は、長期の使用によっても薄れることがない。As described above, the rubber member for preventing double feeding in the paper feeding device of the present invention is entirely composed of a special rubber with a small difference in static-dynamic coefficient of friction, and the surface of this rubber is roughened by finishing. Therefore, when it is incorporated into a paper feeder, the adhesive force between the rubber member and the paper is weak, resulting in an excellent effect that "squeak" does not occur. This effect does not fade even with long-term use.
第１図および第２図はこの発明が対象とする重送防止用
ゴム部材の使用態様を示す説明図、第３図は従来のゴム
部材の問題点の説明図である。
２・・・重送防止用ゴム板 ６・・・重送防止用ゴム口
＊１：５ＥＰ１４２１
（信越シリコン社製）
−フFIGS. 1 and 2 are explanatory diagrams showing how the rubber member for preventing double feeding is used, which is the object of the present invention, and FIG. 3 is an explanatory diagram of problems with the conventional rubber member. 2... Rubber plate for preventing double feeding 6... Rubber port for preventing double feeding *1: 5EP1421 (manufactured by Shin-Etsu Silicon Co., Ltd.) -F
Claims (1)
ムを主成分とするゴム組成物によつて構成され、かつそ
の表面が粗面化されて紙との摩擦係数が０．７〜２．５
に設定されていることを特徴とする給紙装置における重
送防止用ゴム部材。(1) The entire body is made of a rubber composition whose main component is rubber with a small difference between the coefficient of static friction and the coefficient of dynamic friction, and the surface is roughened so that the coefficient of friction with paper is 0.7 to 2. .5
A rubber member for preventing double feeding in a paper feeding device, characterized in that the rubber member is set to .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2085112A JP2880238B2 (en) | 1990-03-31 | 1990-03-31 | Rubber member for preventing double feed in paper feeder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2085112A JP2880238B2 (en) | 1990-03-31 | 1990-03-31 | Rubber member for preventing double feed in paper feeder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03284561A true JPH03284561A (en) | 1991-12-16 |
| JP2880238B2 JP2880238B2 (en) | 1999-04-05 |
Family
ID=13849544
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2085112A Expired - Fee Related JP2880238B2 (en) | 1990-03-31 | 1990-03-31 | Rubber member for preventing double feed in paper feeder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2880238B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5320337A (en) * | 1991-12-17 | 1994-06-14 | Sumitomo Rubber Industries, Ltd. | Paper separating member for paper feeding device |
| JPH10181912A (en) * | 1996-12-25 | 1998-07-07 | Minolta Co Ltd | Paper feeder |
| JPH115638A (en) * | 1997-04-17 | 1999-01-12 | Lexmark Internatl Inc | Paper transfer roller and paper transfer method using the same |
| JP2019026414A (en) * | 2017-07-28 | 2019-02-21 | 株式会社リコー | Member, image forming apparatus, image reading apparatus, and automatic document conveying apparatus |
-
1990
- 1990-03-31 JP JP2085112A patent/JP2880238B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5320337A (en) * | 1991-12-17 | 1994-06-14 | Sumitomo Rubber Industries, Ltd. | Paper separating member for paper feeding device |
| JPH10181912A (en) * | 1996-12-25 | 1998-07-07 | Minolta Co Ltd | Paper feeder |
| JPH115638A (en) * | 1997-04-17 | 1999-01-12 | Lexmark Internatl Inc | Paper transfer roller and paper transfer method using the same |
| JP2019026414A (en) * | 2017-07-28 | 2019-02-21 | 株式会社リコー | Member, image forming apparatus, image reading apparatus, and automatic document conveying apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2880238B2 (en) | 1999-04-05 |
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