JPH092693A - Paper feed roller and manufacture thereof - Google Patents
Paper feed roller and manufacture thereofInfo
- Publication number
- JPH092693A JPH092693A JP7176903A JP17690395A JPH092693A JP H092693 A JPH092693 A JP H092693A JP 7176903 A JP7176903 A JP 7176903A JP 17690395 A JP17690395 A JP 17690395A JP H092693 A JPH092693 A JP H092693A
- Authority
- JP
- Japan
- Prior art keywords
- layer body
- inner layer
- rubber material
- paper feed
- paper
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 229920001971 elastomer Polymers 0.000 claims abstract description 40
- 239000000463 material Substances 0.000 claims abstract description 29
- 238000000465 moulding Methods 0.000 claims description 9
- 238000004073 vulcanization Methods 0.000 claims description 3
- 238000003825 pressing Methods 0.000 description 7
- 238000002347 injection Methods 0.000 description 3
- 239000007924 injection Substances 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 2
- 229920000636 poly(norbornene) polymer Polymers 0.000 description 2
- XBWAZCLHZCFCGK-UHFFFAOYSA-N 7-chloro-1-methyl-5-phenyl-3,4-dihydro-2h-1,4-benzodiazepin-1-ium;chloride Chemical compound [Cl-].C12=CC(Cl)=CC=C2[NH+](C)CCN=C1C1=CC=CC=C1 XBWAZCLHZCFCGK-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000004945 silicone rubber Substances 0.000 description 1
Landscapes
- Handling Of Cut Paper (AREA)
- Delivering By Means Of Belts And Rollers (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Facsimiles In General (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、複写機，ファクシミ
リ，ワ−ドプロセッサ−やコンピュ−タ等のプリンタ−
その他の給紙機構において用いられる給紙ロ−ルに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a copying machine, a facsimile, a word processor, a printer such as a computer, and the like.
The present invention relates to a paper feed roll used in other paper feed mechanisms.
【０００２】[0002]
【従来の技術】プリンタ−等の給紙機構は、ゴムと紙と
の摩擦を利用した給紙、排送方式が一般に採られてお
り、ゴム材料製の給紙ロ−ルで紙を押えながら一枚づつ
引き出すと同時に相手ロ−ルとの間に紙を挟み込んで送
り出すよう構成されている。この際、上記給紙ロ−ルに
作用する押圧力は、機械が長期間停止しているときにも
作用しているので、ゴムがへたってゴムロ−ル表面の一
部に凹み等の永久変形が発生することがある。そのよう
な永久変形が生じると、紙がしわになったり、直進して
送り出すことができない等という給紙精度を損なう原因
となる。2. Description of the Related Art A paper feeding mechanism of a printer or the like generally adopts a paper feeding and discharging system utilizing friction between rubber and paper, while pressing the paper with a paper feeding roll made of a rubber material. At the same time as pulling out one by one, the paper is sandwiched between the partner roll and sent out. At this time, since the pressing force acting on the paper feeding roll also acts when the machine is stopped for a long period of time, the rubber is dented and a permanent deformation such as a dent is formed on a part of the surface of the rubber roll. May occur. If such a permanent deformation occurs, it may cause wrinkling of the paper or impair the accuracy of paper feeding such that the paper cannot be fed straight forward.
【０００３】上記給紙ロ−ルは、紙を確実に一枚づつ引
き出すグリップ力を得るため摩擦係数の高い低硬度のゴ
ム材料を使用し表面を研磨によって粗面にしているのが
一般的である。そのため、上述のように、常にロ−ルに
作用している押圧力によってへたりや凹み等の永久変形
を生じやすいと考えられるが、それだからと言って給紙
ロ−ル全体を硬度の高いゴム材料で構成すると、摩擦係
数が低くなり、紙をグリップする作用が弱くなって送り
出し不良や重送等の支障を来すおそれがある。The above paper feed roll is generally made of a rubber material having a low friction coefficient and a low hardness and a roughened surface so as to obtain a grip force for reliably pulling out the paper one by one. is there. Therefore, as described above, it is considered that permanent pressing deformation is likely to occur due to the pressing force constantly acting on the roll, but that is the reason why the entire feeding roll has high hardness. If it is made of a rubber material, the coefficient of friction becomes low, and the action of gripping the paper becomes weak, which may cause problems such as defective delivery and double feeding.
【０００４】[0004]
【発明の解決課題】本発明の目的は、プリンタ−等の給
紙機構に用いる給紙ロ−ルにおいて、長期間運転を停止
していても永久変形を生じにくく、運転時には紙を一枚
づつ確実に送り出すことができるようにした給紙ロ−ル
を提供することである。また、本発明の目的は、上述の
如き給紙ロ−ルを正確に製造することができる給紙ロ−
ルの製造方法を提供することである。SUMMARY OF THE INVENTION An object of the present invention is to prevent a permanent deformation in a paper feeding roll used in a paper feeding mechanism of a printer or the like even when the operation is stopped for a long period of time. It is an object of the present invention to provide a paper feed roll that can be reliably sent out. Further, an object of the present invention is to provide a paper feed roll capable of accurately manufacturing the above-mentioned paper feed roll.
It is to provide a manufacturing method of the resin.
【０００５】[0005]
【課題解決の手段】本発明によれば、紙面に接する外層
体をグリップ性の高い低硬度のゴム材料で形成し、支軸
に取付けられる内層体を変形の少ない高硬度のゴム材料
で形成し、上記外層体、内層体を加硫一体化したことを
特徴とする給紙ロ−ルが提供され、上記目的が達成され
る。According to the present invention, the outer layer body in contact with the paper surface is made of a rubber material having a high grip and a low hardness, and the inner layer body attached to the support shaft is made of a rubber material having a high hardness and a small deformation. The above-mentioned object is achieved by providing a paper feeding roll characterized by integrally vulcanizing the outer layer body and the inner layer body.
【０００６】また、上記外層体は，、厚さが薄い程ロ−
ル全体の永久変形を生じにくくすることができるが、そ
のような外層体を成形型を用いて内層体の表面に注入成
形しようとすると、注入圧力によって内層体が変形して
外層体が偏肉し、その結果得られた給紙ロ−ルでは正確
な給紙を行うことができなくなる。この際、本発明によ
れば、内層体を成形型内にセットし、ゴム材料を内層体
の側面から型内に注入して内層体と外層体を一体成形す
ることを特徴とする給紙ロ−ルの製造方法が提供され、
上記のような偏肉を生じないようにした給紙ロ−ルが得
られる。[0006] The thinner the outer layer body, the lower the thickness.
Although it is possible to prevent permanent deformation of the entire inner layer, if such an outer layer body is injection-molded on the surface of the inner layer body by using a molding die, the inner layer body is deformed by the injection pressure and the outer layer body has an uneven thickness. However, the paper feed roll obtained as a result cannot accurately feed the paper. At this time, according to the present invention, the inner layer body is set in a molding die, and a rubber material is injected into the die from a side surface of the inner layer body to integrally mold the inner layer body and the outer layer body. -A manufacturing method of
It is possible to obtain a paper feed roll that does not cause the uneven thickness as described above.
【０００７】[0007]
【作用】給紙部において、紙面に接する給紙ロ−ルは、
表面が低硬度のゴム材料で形成されているので、紙を確
実にグリップして一枚づつ送り出し、また内層体が高硬
度のゴム材料で形成されていから、ロ−ルに常に押圧力
が作用していても永久変形を生じにくく、給紙精度を高
められる。In the paper feed section, the paper feed roll contacting the paper surface is
Since the surface is made of low hardness rubber material, the paper is securely gripped and fed one by one, and the inner layer is made of high hardness rubber material, so the pressing force always acts on the roll. Even if it does, permanent deformation is unlikely to occur and the feeding accuracy can be improved.
【０００８】[0008]
【実施例】以下実施例と共に説明する。図１に示すよう
に、給紙ロ−ル（１）は支軸（２）に取付けられ、紙面
に接する外層体（３）をグリップ性の高い低硬度のゴム
材料で形成し、該外層体（３）の内方に変形の少ない高
硬度のゴム材料で形成した内層体（４）を加硫一体化し
て設け、上記外層体（３）の表面を研磨により細かく荒
らして粗面を形成してある。なお、内外の二重層に形成
してあるが、中間層を設けて三重層等の多重層に形成す
ることもできる。また、給紙ロ−ル（１）の数は、図１
（Ａ）のように３個等の複数個にしたり、（Ｂ）のよう
に１本にしたりでき、ロ−ル端には図１（Ｃ）のように
ボス（５）を設けることもある。Embodiments will be described below together with embodiments. As shown in FIG. 1, a paper feed roll (1) is attached to a support shaft (2), and an outer layer body (3) in contact with the paper surface is formed of a rubber material having a high grip property and a low hardness. An inner layer body (4) formed of a rubber material of high hardness with little deformation is provided inwardly of (3) by vulcanization and integrated, and the surface of the outer layer body (3) is finely roughened by polishing to form a rough surface. There is. Although the inner and outer double layers are formed, an intermediate layer may be provided to form a multi-layer such as a triple layer. The number of paper feed rolls (1) is as shown in FIG.
It can be plural such as three as in (A) or one as in (B), and a boss (5) may be provided at the end of the roll as shown in FIG. 1 (C). .
【０００９】図に示す実施例においては、上記外層体
（３）のゴム硬度は約１０〜４０°、好ましくは約２０
〜３０°、内層体（４）のゴム硬度は約５０〜１００
°、好ましくは約７０〜８０°であり、ゴム材料として
はＥＰＤＭ（エチレン プロピレン ジエン共重合ゴ
ム）を用いているが、ＰＮＲ（ポリノルボ−ネンゴム）
やシリコ−ン系のゴム材料等適宜の耐摩耗性、耐候性を
有するゴム材料が使用できる。なお、上記外層体（３）
は、紙を汚さぬよう白色、灰色等にカラ−化するとよ
く、その厚さは約２mm以下、好ましくは約0.７〜１mm程
度に薄く形成するとよい。In the illustrated embodiment, the rubber hardness of the outer layer body (3) is about 10 to 40 °, preferably about 20.
-30 °, the rubber hardness of the inner layer body (4) is about 50-100.
And preferably about 70-80 °. EPDM (ethylene propylene diene copolymer rubber) is used as the rubber material, but PNR (polynorbornene rubber) is used.
A rubber material having appropriate wear resistance and weather resistance such as a silicone rubber material can be used. The outer layer body (3)
May be colored white, gray or the like so as not to stain the paper, and the thickness thereof may be thinned to about 2 mm or less, preferably about 0.7 to 1 mm.
【００１０】上記給紙ロ−ル（１）を押出成形で製造す
るには、上述したような高硬度のＥＰＤＭ等が芯材とな
り、低硬度のＥＰＤＭ等がその表面被覆となるように二
重押出機で押し出し、加硫缶等で加硫した後、例えば３
０mm等の所定長に切断し、表面を研磨機で粗面に研磨す
れば、図１（Ａ）に示す如き給紙ロ−ルが得られ、長く
形成すれば図１（Ｂ）のような給紙ロ−ルが得られる。In order to manufacture the above-mentioned paper feed roll (1) by extrusion molding, the above-mentioned high hardness EPDM or the like serves as a core material, and low hardness EPDM or the like serves as a surface coating thereof. After extruding with an extruder and vulcanizing with a vulcanizer, etc.,
If it is cut into a predetermined length such as 0 mm and the surface is polished to a rough surface with a grinder, a paper feed roll as shown in FIG. 1 (A) can be obtained, and if it is formed to be long, as shown in FIG. 1 (B). A paper feed roll is obtained.
【００１１】成形型を用いて射出注入成形やポット式注
入成形で製造すれば、図１（Ａ）、（Ｂ）に示すような
単純な円筒状のロ−ルは勿論、図１（Ｃ）に示すように
内層体の両端にボスを有するような複雑な形状の給紙ロ
−ルを作ることができる。すなわち、予め高硬度のゴム
材料で内層体（４）を成形し、この内層体（４）を成形
型にセットして低硬度のゴム材料をその外側に注入成形
し外層体（３）を成形することができる。この場合、上
記内層体（４）は、図１（Ａ）、（Ｂ）に示すような形
状の場合は、押出成形により、また図１（Ｃ）に示すよ
うに両端にボス（５）を有する場合は、金型を用いて注
入成形すればよい。If injection molding or pot-type injection molding is used to manufacture the molding die, not only a simple cylindrical roll as shown in FIGS. 1 (A) and 1 (B) but also FIG. It is possible to make a paper feed roll having a complicated shape having bosses at both ends of the inner layer body as shown in FIG. That is, the inner layer body (4) is molded in advance with a high hardness rubber material, the inner layer body (4) is set in a molding die, and the low hardness rubber material is injected outside to mold the outer layer body (3). can do. In this case, when the inner layer body (4) has a shape as shown in FIGS. 1 (A) and 1 (B), it is extruded, and as shown in FIG. 1 (C), bosses (5) are provided at both ends. If it has, injection molding may be performed using a mold.
【００１２】図２は成形型の一例を示し、上記のように
して予め成形した内層体（４）を半加硫状態にして中央
型ピン（６）に装着する。該中央型ピン（６）の下方に
は下金型（７）が、上方には上金型（８）が設けられ、
両金型（７），（８）の間には内層体の周囲に幅狭の環
状のキャビティ（９）を形成するよう中金型(10)が設け
られている。上記上金型（８）には外層体を成形するた
めのゴム材料を注入する注入口(11)が形成され、上記中
金型(10)には上記注入口(11)に連通し上記内層体（４）
の側面上方部に向かって例えば、中金型の上部面から約
２〜３mm下った上方部に開口するゲ−ト(12)が設けら
れ、該ゲ−トを通して低硬度のゴム材料を注入して外層
体（３）が形成される。この際、ゲ−トを上記上金型
（８）に設けて、ゴム材料を上記キャビティの上部面か
ら注入しようとすると、注入圧力により上記内層体
（４）がつぶれ、外層体（３）を均一な厚さに成形する
ことはできない。上記のようにして成形したら、加硫
し、その後表面を研磨して粗面を形成すればよい。FIG. 2 shows an example of a molding die, in which the inner layer body (4) preliminarily molded as described above is semi-vulcanized and mounted on the center mold pin (6). A lower die (7) is provided below the central die pin (6), and an upper die (8) is provided above the central die (6),
A middle mold (10) is provided between the molds (7) and (8) so as to form a narrow annular cavity (9) around the inner layer body. The upper mold (8) is formed with an injection port (11) for injecting a rubber material for molding an outer layer body, and the middle mold (10) is connected to the injection port (11) to form the inner layer. Body (4)
A gate (12) is provided which opens downward from the upper surface of the middle mold by about 2 to 3 mm toward the upper side surface of the mold, and a rubber material of low hardness is injected through the gate. As a result, the outer layer body (3) is formed. At this time, when a gate is provided on the upper mold (8) to inject a rubber material from the upper surface of the cavity, the inner layer body (4) is crushed by the injecting pressure and the outer layer body (3) is crushed. It cannot be molded to a uniform thickness. After molding as described above, vulcanization may be performed, and then the surface may be polished to form a rough surface.
【００１３】[0013]
【発明の効果】本発明は上記のように構成されているの
で、給紙ロ−ルに常に押圧力が作用していても永久変形
しにくく、運転時には低硬度のゴム材料で形成した外層
体により紙を確実にグリップして一枚づつ正確に送り出
すことができ、また外層体と内層体は加硫一体化されて
いるから、製造の際にゴム表面を研磨するときには、ゴ
ム層間に剥離現象がなく、ゴムのたわみもないため研磨
精度が安定すると共にプリンタ−等で運転するときには
薄い外層体がゆがんだり、たわむことがなく、給紙精度
を高めることができる。EFFECTS OF THE INVENTION Since the present invention is constructed as described above, the outer layer body is made of a rubber material having a low hardness during operation and is unlikely to be permanently deformed even when a pressing force is constantly applied to the paper feeding roller. The paper can be gripped securely and delivered one by one accurately, and since the outer layer body and inner layer body are vulcanized and integrated, when the rubber surface is polished during manufacturing, peeling phenomenon occurs between the rubber layers. In addition, since there is no bending of the rubber, the polishing accuracy is stable, and the thin outer layer body is not distorted or bent when operating in a printer or the like, and the feeding accuracy can be improved.
【図１】本発明の一実施例を示し、（Ａ）は一部切欠斜
視図、（Ｂ）は給紙ロ−ルが１本の実施例の斜視図、
（Ｃ）はボスを有する実施例の斜視図である。FIG. 1 shows an embodiment of the present invention, in which (A) is a partially cutaway perspective view, and (B) is a perspective view of an embodiment in which a single paper feed roll is provided,
(C) is a perspective view of an embodiment having a boss.
【図２】製造の際の成形型の一実施例を示す断面図。FIG. 2 is a cross-sectional view showing an embodiment of a molding die during manufacturing.
１ 給紙ロ−ル ２ 支軸 ３ 外層体 ４ 内層体 1 Paper feed roll 2 Spindle 3 Outer layer 4 Inner layer
【手続補正書】[Procedure amendment]
【提出日】平成７年７月２６日[Submission date] July 26, 1995
【手続補正２】[Procedure amendment 2]
【補正対象書類名】明細書[Document name to be amended] Statement
【補正対象項目名】０００７[Correction target item name] 0007
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【０００７】[0007]
【作用】給紙部において、紙面に接する給紙ロールは、
表面が低硬度のゴム材料で形成されているので、紙を確
実にグリップして一枚づつ送り出し、また内層体が高硬
度のゴム材料で形成されているから、ロールに常に押圧
力が作用していても永久変形を生じにくく、給紙精度を
高められる。In the paper feed section, the paper feed roll that is in contact with the paper surface is
Since the surface is formed of a rubber material of low hardness, reliably feeding one by one to grip the paper, and because the inner layer body that is formed of a rubber material of high hardness, always pressing force acts on the roll However, permanent deformation is unlikely to occur and the feeding accuracy can be improved.
Claims (4)
低硬度のゴム材料で形成し、支軸に取付けられる内層体
を変形の少ない高硬度のゴム材料で形成し、上記外層
体、内層体を加硫一体化したことを特徴とする給紙ロ−
ル。1. An outer layer body in contact with a paper surface is formed of a low-hardness rubber material having a high grip property, and an inner layer body attached to a support shaft is formed of a high-hardness rubber material with little deformation. Paper feeding roll characterized by vulcanization integrated
Le.
上記内層体のゴム硬度は５０〜１００°である請求項１
に記載の給紙ロ−ル。2. The rubber hardness of the outer layer body is 10 to 40 °,
The rubber hardness of the inner layer body is 50 to 100 °.
Paper feed roll described in.
項１又は２に記載の給紙ロ−ル。3. The paper feed roll according to claim 1, wherein the outer layer body has a thickness of 2 mm or less.
た略円筒状の内層体を、その周囲に幅狭の環状のキャビ
ティを形成するよう成形型にセットし、該内層体の側面
に向かって開口するゲ−トから低硬度のゴム材料を上記
キャビティ内に注入して外層体を上記内層体と一体成形
することを特徴とする給紙ロ−ルの製造方法。4. A substantially cylindrical inner layer body formed of a rubber material of high hardness with little deformation is set in a molding die so as to form a narrow annular cavity around the inner layer body, and the inner layer body is directed toward the side surface of the inner layer body. A method of manufacturing a sheet feeding roll, characterized in that a rubber material having a low hardness is injected into the cavity from a gate opened to form the outer layer body integrally with the inner layer body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7176903A JPH092693A (en) | 1995-06-21 | 1995-06-21 | Paper feed roller and manufacture thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7176903A JPH092693A (en) | 1995-06-21 | 1995-06-21 | Paper feed roller and manufacture thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH092693A true JPH092693A (en) | 1997-01-07 |
Family
ID=16021775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7176903A Pending JPH092693A (en) | 1995-06-21 | 1995-06-21 | Paper feed roller and manufacture thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH092693A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5957100A (en) * | 1982-09-24 | 1984-04-02 | 三菱電機株式会社 | Control system of directivity of spin satellite |
| JPH0616301A (en) * | 1992-06-29 | 1994-01-25 | Bridgestone Corp | Method for coating surface of roller for copying machine |
-
1995
- 1995-06-21 JP JP7176903A patent/JPH092693A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5957100A (en) * | 1982-09-24 | 1984-04-02 | 三菱電機株式会社 | Control system of directivity of spin satellite |
| JPH0616301A (en) * | 1992-06-29 | 1994-01-25 | Bridgestone Corp | Method for coating surface of roller for copying machine |
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