JP2006167914A - Sheet discharge roller of printer - Google Patents
Sheet discharge roller of printer Download PDFInfo
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- JP2006167914A JP2006167914A JP2004338506A JP2004338506A JP2006167914A JP 2006167914 A JP2006167914 A JP 2006167914A JP 2004338506 A JP2004338506 A JP 2004338506A JP 2004338506 A JP2004338506 A JP 2004338506A JP 2006167914 A JP2006167914 A JP 2006167914A
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- synthetic resin
- discharge roller
- coating layer
- paper discharge
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- 229920003002 synthetic resin Polymers 0.000 claims abstract description 80
- 239000000057 synthetic resin Substances 0.000 claims abstract description 80
- 239000011247 coating layer Substances 0.000 claims abstract description 45
- 239000002245 particle Substances 0.000 claims abstract description 44
- 239000007787 solid Substances 0.000 claims abstract description 5
- 239000002184 metal Substances 0.000 claims description 8
- 239000010410 layer Substances 0.000 abstract description 19
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000006866 deterioration Effects 0.000 abstract description 4
- 238000011109 contamination Methods 0.000 abstract 1
- 230000001747 exhibiting effect Effects 0.000 abstract 1
- 239000000463 material Substances 0.000 description 9
- 239000000853 adhesive Substances 0.000 description 7
- 230000001070 adhesive effect Effects 0.000 description 7
- 239000000919 ceramic Substances 0.000 description 5
- 238000007747 plating Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000009503 electrostatic coating Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000843 powder Substances 0.000 description 3
- 239000004593 Epoxy Substances 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000006061 abrasive grain Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229910003460 diamond Inorganic materials 0.000 description 1
- 239000010432 diamond Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000000873 masking effect Effects 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 229910052755 nonmetal Inorganic materials 0.000 description 1
- 238000001454 recorded image Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Delivering By Means Of Belts And Rollers (AREA)
- Handling Of Cut Paper (AREA)
Abstract
Description
本発明は、プリンタの排紙ローラに関し、特に摩擦係数の大きいセラミックコート層を形成したものに関する。 The present invention relates to a paper discharge roller of a printer, and particularly relates to a printer in which a ceramic coat layer having a large friction coefficient is formed.
インクジェットプリンタにおいて、インクジェットヘッドが記録紙の搬送方向と直交方向へ往復移動しながら記録する記録領域よりも、上流側と下流側には記録紙を送る送紙ローラと排紙ローラとが夫々設けられている。
前記排紙ローラは、インクジェットヘッドにより記録した記録紙の表面に接触する複数の拍車ローラと協働して記録紙を搬送するものである。
In an ink jet printer, a paper feed roller and a paper discharge roller for feeding a recording paper are provided on the upstream side and the downstream side, respectively, from the recording area in which the ink jet head reciprocally moves in a direction orthogonal to the recording paper transport direction. ing.
The paper discharge roller conveys the recording paper in cooperation with a plurality of spur rollers contacting the surface of the recording paper recorded by the ink jet head.
前記拍車ローラは、複数の尖鋭部を有する金属製のディスク状のローラであり、複数の尖鋭部の摩耗を防止するために、従来、排紙ローラとして、金属製の小径軸部材と、この小径軸部材のうちの複数の拍車ローラに対応する部位に夫々外嵌固定された複数のゴムローラとから構成されている。例えば、特許文献１には、この種の排紙ローラにおいて、ゴムローラや合成樹脂製ローラを小径軸部材に固定する構造を改善したものが提案されている。 The spur roller is a metal disk-shaped roller having a plurality of sharp portions, and conventionally, a metal small-diameter shaft member and a small diameter shaft member are used as a discharge roller in order to prevent wear of the plurality of sharp portions. The shaft member includes a plurality of rubber rollers that are externally fitted and fixed to portions corresponding to the plurality of spur rollers. For example, Patent Document 1 proposes a paper discharge roller of this type having an improved structure for fixing a rubber roller or a synthetic resin roller to a small-diameter shaft member.
尚、送紙ローラとして従来から種々の構造ものが採用されているが、特許文献２に示すように、本願出願人が提案した送紙ローラは、金属管材の表面に所定の厚さの合成樹脂被覆層を形成し、その合成樹脂被覆層の表面にセラミックの多数の硬質粒子を混入した合成樹脂摩擦コート層を形成して摩擦係数を大きくし、耐久性を高め、軽量化と低コスト化を図ったものであり、広く普及しつつある。
インクジェットキプリンタにより、写真等を縁なしで記録（印刷）を行う場合、記録紙の後端が送紙ローラから外れた後は、排紙ローラのみで記録紙を搬送することになる。このとき、送紙ローラと排紙ローラとで記録紙を搬送する搬送状態から、排紙ローラのみで記録紙を搬送する搬送状態に切換わる時、細い筋が記録されてしまう。これは、送紙ローラの搬送特性と排紙ローラの搬送特性が微妙に異なるため、搬送速度の微妙な急変が発生するためである。 When recording (printing) a photograph or the like without a border by an ink jet printer, the recording paper is transported only by the paper discharge roller after the trailing edge of the recording paper is removed from the paper feeding roller. At this time, when switching from a conveyance state in which the recording paper is conveyed by the paper feed roller and the paper discharge roller to a conveyance state in which the recording paper is conveyed only by the paper discharge roller, fine streaks are recorded. This is because the transport characteristics of the paper feed roller and the transport characteristics of the paper discharge roller are slightly different, and a subtle sudden change in the transport speed occurs.
特許文献１の排紙ローラのように、従来は、拍車ローラが当接する相手方の排紙ローラは、ゴムや合成樹脂等の軟質材料製のローラとするのが当業者の常識であった。しかし、複数のゴムローラや樹脂製ローラを組み込んだ排紙ローラでは、ゴムの劣化や汚れや温度変化により摩擦特性が変化し、記録紙搬送特性が変動し、前記のように縁なし記録の場合など記録画像の品質を高めにくいこと、送紙ローラと同様の構造の排紙ローラにすることが難しいこと、軽量化を図りにくいこと、製作費を低減するのが難しいことなどの問題がある。 Conventionally, it has been common knowledge of those skilled in the art that the counterpart paper discharge roller with which the spur roller abuts is a roller made of a soft material such as rubber or synthetic resin, like the paper discharge roller of Patent Document 1. However, with a paper discharge roller that incorporates multiple rubber rollers or resin rollers, the friction characteristics change due to rubber deterioration, dirt, or temperature changes, and the recording paper conveyance characteristics fluctuate. There are problems that it is difficult to improve the quality of the recorded image, it is difficult to make a discharge roller having the same structure as the paper feed roller, it is difficult to reduce the weight, and it is difficult to reduce the production cost.
従来の排紙ローラの小径軸状部材にはメッキ処理が施されるが、メッキ処理環境面で有害な廃液が発生するので好ましくない。
プリンタの開発段階において、本体ケースやローラ部材やギヤ部材を組み込んだ本体ユニットを約２〜３ｍの高さから落下させる落下強度試験を行う関係上、ローラ部材の重量が大きい場合、落下強度試験の面でも非常に不利である。
本発明の目的は、安定した耐久性に優れる摩擦特性を持ち且つ拍車ローラの耐久性を確保できる排紙ローラ、軽量化可能な排紙ローラ、製作費を低減可能な排紙ローラ、などを提供することである。
Plating is performed on the small-diameter shaft member of the conventional paper discharge roller, but it is not preferable because waste liquid harmful to the plating processing environment is generated.
In the development stage of the printer, a drop strength test is performed to drop the main unit incorporating the main body case, roller member, and gear member from a height of about 2 to 3 m. It is also very disadvantageous.
The object of the present invention is to provide a paper discharge roller having stable and excellent friction characteristics and ensuring the durability of the spur roller, a paper discharge roller that can be reduced in weight, a paper discharge roller that can reduce production costs, and the like. It is to be.
請求項１のプリンタの排紙ローラは、プリンタの記録ヘッドよりも記録紙搬送方向下流側において複数の拍車ローラと協働して記録紙を送る排紙ローラにおいて、前記排紙ローラは、円管状又は中実丸棒状のローラ本体と、このローラ本体の表面に形成された合成樹脂被覆層と、この合成樹脂被覆層の少なくとも一部の表面に形成された合成樹脂摩擦コート層であって多数の硬質粒子を含む合成樹脂摩擦コート層とを備えたことを特徴とするものである。 The paper discharge roller of the printer according to claim 1 is a paper discharge roller for feeding a recording paper in cooperation with a plurality of spur rollers on the downstream side in the recording paper conveyance direction with respect to the recording head of the printer. Or a solid round bar-shaped roller body, a synthetic resin coating layer formed on the surface of the roller body, and a synthetic resin friction coating layer formed on at least a part of the surface of the synthetic resin coating layer. And a synthetic resin friction coating layer containing hard particles.
印刷対象の記録紙を搬送する際、排紙ローラの表面に露出している多数の硬質粒子が記録紙に食い込みつつ搬送する。拍車ローラは記録紙を介在させた状態で拍車ローラに係合するが、拍車ローラの尖鋭部がローラ本体に接触することはなく、合成樹脂被覆層と接触しながら記録紙の搬送を行う。 When the recording paper to be printed is transported, a large number of hard particles exposed on the surface of the paper discharge roller are transported while biting into the recording paper. The spur roller engages the spur roller with the recording paper interposed therebetween, but the sharp portion of the spur roller does not contact the roller body, and the recording paper is conveyed while being in contact with the synthetic resin coating layer.
請求項２のプリンタの排紙ローラは、請求項１の発明において、前記プリンタはインクジェットプリンタであり、前記ローラ本体は金属製の円管状管材であることを特徴とする。
請求項３のプリンタの排紙ローラは、請求項２の発明において、前記排紙ローラは、前記プリンタの送紙ローラとほぼ同様の構造に構成されたことを特徴とする。
The paper discharge roller of the printer according to claim 2 is characterized in that, in the invention of claim 1, the printer is an ink jet printer, and the roller body is a metal tubular tube.
According to a third aspect of the present invention, there is provided a paper discharge roller according to the second aspect of the invention, wherein the paper discharge roller has a structure substantially similar to that of the paper feed roller of the printer.
請求項４のプリンタの排紙ローラは、請求項２又は３の発明において、前記排紙ローラには、複数又は複数群の拍車ローラに対応する複数の拍車ローラ対応部であって、合成樹脂摩擦コート層を形成せずに合成樹脂被覆層を露出させた複数の拍車ローラ対応部を形成したことを特徴とする。 The discharge roller of the printer according to claim 4 is the invention according to claim 2 or 3, wherein the discharge roller is a plurality of spur roller corresponding portions corresponding to a plurality or a plurality of groups of spur rollers, and the synthetic resin friction A plurality of spur roller corresponding portions in which the synthetic resin coating layer is exposed without forming a coat layer are formed.
請求項１のプリンタの排紙ローラによれば、合成樹脂摩擦コート層に多数の硬質粒子を含むため、排紙ローラの摩擦係数を大きくし、温度変化や劣化や汚れによる摩擦特性の変動を防止して、安定した耐久性に優れる摩擦特性や記録紙搬送特性を確保できる。この合成樹脂摩擦コート層の内側に合成樹脂被覆層を有するため、拍車ローラが硬質のローラ本体と接触することがないから、拍車ローラの耐久性を確保できる。摩擦特性に優れる排紙ローラは送紙ローラとほぼ同様の構造に構成することが可能になるから、送紙ローラと排紙ローラの記録紙搬送特性を同等にして、写真等を縁なし印刷する際の印刷品質を高めることができる。
ローラ本体を合成樹脂被覆層で覆うためローラ本体のメッキ処理を省略できるから環境上面好ましい。
According to the discharge roller of the printer of the first aspect, since the synthetic resin friction coat layer contains a large number of hard particles, the friction coefficient of the discharge roller is increased to prevent fluctuations in friction characteristics due to temperature change, deterioration, and dirt. Thus, it is possible to ensure the friction characteristics and the recording paper conveyance characteristics which are excellent in stable durability. Since the synthetic resin coating layer is provided inside the synthetic resin friction coating layer, the spur roller does not come into contact with the hard roller body, so that the durability of the spur roller can be ensured. Since the paper discharge roller with excellent friction characteristics can be configured in almost the same structure as the paper feed roller, the recording paper transport characteristics of the paper feed roller and paper discharge roller are made equal to print a photo or the like without borders. Printing quality can be improved.
Since the roller main body is covered with the synthetic resin coating layer, the plating treatment of the roller main body can be omitted, which is preferable from the environmental top.
請求項２の発明によれば、プリンタはインクジェットプリンタであり、前記ローラ本体は金属製の円管状管材であるので、インクジェットプリンタの排紙ローラの軽量化を図り、製作費の低減を図ることができる。 According to the invention of claim 2, since the printer is an ink jet printer and the roller body is a metal tubular tube material, the discharge roller of the ink jet printer can be reduced in weight and the production cost can be reduced. it can.
請求項３の発明によれば、請求項２の発明において、前記排紙ローラはプリンタの送紙ローラとほぼ同様の構造に構成されたため、送紙ローラの記録紙搬送特性と、排紙ローラの記録紙搬送特性とをほぼ同等にし、記録紙搬送性能を高め、印刷品質を高めることができる。 According to a third aspect of the invention, in the second aspect of the invention, since the paper discharge roller is configured in substantially the same structure as a paper feed roller of a printer, the recording paper conveyance characteristics of the paper feed roller and the paper discharge roller The recording paper conveyance characteristics can be made almost equal, the recording paper conveyance performance can be improved, and the printing quality can be improved.
請求項４の発明によれば、前記排紙ローラには、複数又は複数群の拍車ローラに対応する複数の拍車ローラ対応部であって、合成樹脂摩擦コート層を形成せずに合成樹脂被覆層を露出させた複数の拍車ローラ対応部を形成したので、硬質粒子による拍車ローラの摩耗を防止することができる。 According to the invention of claim 4, the discharge roller is a plurality of spur roller corresponding parts corresponding to a plurality or a plurality of groups of spur rollers, and the synthetic resin coating layer is formed without forming a synthetic resin friction coating layer. Since the plurality of spur roller corresponding portions that are exposed are formed, it is possible to prevent the spur roller from being worn by hard particles.
本発明のプリンタの排紙ローラは、プリンタの記録ヘッドよりも記録紙搬送方向下流側において複数の拍車ローラと協働して記録紙を送る排紙ローラにおいて、前記排紙ローラは、円管状又は中実丸棒状のローラ本体と、このローラ本体の表面に形成された合成樹脂被覆層と、この合成樹脂被覆層の少なくとも一部の表面に形成された合成樹脂摩擦コート層であって多数の硬質粒子を含む合成樹脂摩擦コート層とを備えたものである。 The paper discharge roller of the printer of the present invention is a paper discharge roller for feeding a recording paper in cooperation with a plurality of spur rollers on the downstream side in the recording paper conveyance direction from the recording head of the printer. A solid round bar-shaped roller body, a synthetic resin coating layer formed on the surface of the roller body, and a synthetic resin friction coating layer formed on at least a part of the surface of the synthetic resin coating layer. And a synthetic resin friction coat layer containing particles.
以下、本発明の実施例について説明する。
図１に示すように、インクジェットプリンタにおいて、記録ヘッド１による記録領域２に対して、記録紙Ｐを搬送する記録紙搬送方向の上流側には、送紙ローラ３とそのピンチローラ４とが設けられ、記録紙搬送方向の下流側には、排紙ローラ５と、例えば４つの拍車ローラ６が設けられ、これらのローラ３〜６により記録紙が搬送される。
Examples of the present invention will be described below.
As shown in FIG. 1, in the ink jet printer, a paper feeding roller 3 and its pinch roller 4 are provided on the upstream side in the recording paper conveyance direction for conveying the recording paper P with respect to the recording area 2 by the recording head 1. A paper discharge roller 5 and, for example, four spur rollers 6 are provided on the downstream side in the recording paper conveyance direction, and the recording paper is conveyed by these rollers 3 to 6.
最初に、排紙ローラ５の構造について説明する。
図２、図３に示すように、排紙ローラ５は、鋼製の円管状管材からなるローラ本体１０と、このローラ本体１０の表面に形成された合成樹脂被覆層１１と、この合成樹脂被覆層１１の表面に形成された硬質粒子入りの合成樹脂摩擦コート層１２とを有する。
First, the structure of the paper discharge roller 5 will be described.
As shown in FIGS. 2 and 3, the paper discharge roller 5 includes a roller body 10 made of a steel tubular tube, a synthetic resin coating layer 11 formed on the surface of the roller body 10, and the synthetic resin coating. And a synthetic resin friction coat layer 12 containing hard particles formed on the surface of the layer 11.
前記ローラ本体１０としての円管状管材は、肉厚が例えば約0.４〜0.８ｍｍで、外径が例えば10〜12ｍｍのものである。合成樹脂被覆層１１は、例えばアクリル系合成樹脂やエポキシ系合成樹脂などの合成樹脂被覆層であり、その層厚さは例えば800 〜1200μｍである。この合成樹脂被覆層１１は例えば押し出し成形などの方法で形成することができる。 The tubular tubular material as the roller body 10 has a thickness of about 0.4 to 0.8 mm, for example, and an outer diameter of 10 to 12 mm, for example. The synthetic resin coating layer 11 is a synthetic resin coating layer such as an acrylic synthetic resin or an epoxy synthetic resin, and has a layer thickness of, for example, 800 to 1200 μm. The synthetic resin coating layer 11 can be formed by a method such as extrusion molding.
合成樹脂摩擦コート層１２は、紫外線硬化型の合成樹脂接着剤を紫外線により硬化させた層厚約40μｍの摩擦コート層であって、その表面に露出する多数の硬質粒子１３を有する摩擦コート層である。前記紫外線硬化型の合成樹脂接着剤としては、エポキシ系やアクリル系の合成樹脂接着剤を採用し、その合成樹脂接着剤を例えば吹き付け塗装やスピンコーティング法により合成樹脂被覆層１１の表面に形成する。 The synthetic resin friction coating layer 12 is a friction coating layer having a layer thickness of about 40 μm obtained by curing an ultraviolet curable synthetic resin adhesive with ultraviolet rays, and is a friction coating layer having a large number of hard particles 13 exposed on the surface thereof. is there. As the ultraviolet curable synthetic resin adhesive, an epoxy or acrylic synthetic resin adhesive is adopted, and the synthetic resin adhesive is formed on the surface of the synthetic resin coating layer 11 by spray coating or spin coating, for example. .
前記硬質粒子１３としては、粒径40μｍ以上（好ましくは40〜60μｍ）の範囲に含まれるほぼ所定の粒径の例えばアルミナが採用される。この硬質粒子１３は、前記合成樹脂被覆層１１の外表面に紫外線硬化型の合成樹脂接着剤を塗布した状態で、その表面に加圧エアと共とに粉状の硬質粒子１３を吹きつけることで付着させ、その後合成樹脂接着剤に紫外線を照射して、多数の硬質粒子１３を固着した状態に硬化させる。
尚、硬質粒子１３の粒径と、合成樹脂摩擦コート層１２の層厚には相関関連をもたせることが望ましく、合成樹脂摩擦コート層１２の層厚は硬質粒子１３の粒径より小さい値（好ましくは、硬質粒子１３の粒径の１／２〜２／３程度）に設定することが望ましい。尚、硬質粒子１３としては、粒径40μｍ以上のものに限定されるものではなく、粒径20〜40μｍの範囲の所定の粒径の硬質粒子１３も適用可能である。
As the hard particles 13, for example, alumina having a predetermined particle size within a range of 40 μm or more (preferably 40 to 60 μm) is employed. The hard particles 13 are sprayed with powdered hard particles 13 together with pressurized air in a state where an ultraviolet curable synthetic resin adhesive is applied to the outer surface of the synthetic resin coating layer 11. Then, the synthetic resin adhesive is irradiated with ultraviolet rays to cure the hard particles 13 in a fixed state.
It is desirable to correlate the particle diameter of the hard particles 13 with the layer thickness of the synthetic resin friction coat layer 12, and the layer thickness of the synthetic resin friction coat layer 12 is smaller than the particle diameter of the hard particles 13 (preferably Is preferably set to about 1/2 to 2/3 of the particle size of the hard particles 13. The hard particles 13 are not limited to those having a particle size of 40 μm or more, and hard particles 13 having a predetermined particle size in the range of 20 to 40 μm can also be applied.
前記硬質粒子１３して、アルミナ以外に、各種のセラミック粒子、ガラス粒子、ダイヤモンド粒子、硬質の金属粒子、硬質の砥粒なども採用可能である。尚、多数の硬質粒子１３は、搬送される記録紙Ｐに対する高い安定した摩擦係数を得るために設けられるものであり、以上の構造の場合の摩擦係数は約1.1 である。 As the hard particles 13, in addition to alumina, various ceramic particles, glass particles, diamond particles, hard metal particles, hard abrasive grains, and the like can be used. The large number of hard particles 13 are provided in order to obtain a high and stable coefficient of friction against the recording paper P being conveyed. The coefficient of friction in the above structure is about 1.1.
図２に示すように、例えば４つの拍車ローラ６に対する部位には、合成樹脂摩擦コート層１２を形成せずに合成樹脂被覆層１１を露出させた拍車ローラ対応部１４が夫々形成されている。この拍車ローラ対応部１４は、合成樹脂被覆層１１の表面にテープを貼ってマスキングすることにより、合成樹脂接着剤が塗布されないようにして形成される。このような拍車ローラ対応部１４には、硬質粒子１３がないので、拍車ローラ６が硬質粒子１３と接触することがないから、硬質粒子１３との接触で摩耗することがなく、拍車ローラ６の耐久性を確保することができる。尚、拍車ローラ６は、２つの拍車ローラ６を接近配置したものを１群として、複数群の拍車ローラ６が設けられる場合があるが、その場合各群の拍車ローラ６毎に１つの拍車ローラ対応部１４を形成してもよい。つまり、図２の例では、各拍車ローラ対応部１４に１群２個の拍車ローラ６が対応することになる。 As shown in FIG. 2, for example, spur roller corresponding portions 14 in which the synthetic resin coating layer 11 is exposed without forming the synthetic resin friction coating layer 12 are formed on the four spur rollers 6. The spur roller corresponding portion 14 is formed so that the synthetic resin adhesive is not applied by applying a mask to the surface of the synthetic resin coating layer 11 by applying a tape. Since the spur roller corresponding portion 14 does not have the hard particles 13, the spur roller 6 does not come into contact with the hard particles 13, so that the spur roller 6 does not wear due to contact with the hard particles 13. Durability can be ensured. The spur roller 6 may be provided with a plurality of spur rollers 6 in which two spur rollers 6 are arranged close to each other. In this case, one spur roller is provided for each group of spur rollers 6. The corresponding portion 14 may be formed. That is, in the example of FIG. 2, two spur rollers 6 in one group correspond to each spur roller corresponding portion 14.
ここで、前記の排紙ローラ５と拍車ローラ６の耐久性を確認するため、拍車ローラ６を排紙ローラ５に当接させ、拍車ローラ６に約４５ｇの荷重を掛けた状態で、20000 回の記録紙送りに対応する耐久試験を実行した。尚、実際のインクジェットプリンタにおいて拍車ローラ６にかかる荷重は約２０〜２５ｇ程度である。この耐久試験後の拍車ローラ６の要部拡大図を図４に示すが、拍車ローラ６の尖鋭部６ａの摩耗は無視し得る程度であったし、拍車ローラ対応部１４の表面には、拍車ローラ６により多数の微小凹凸が発生したが、それらの微小凹凸は、硬質粒子１３による凹凸の範囲内のものであったため、記録紙Ｐの搬送に何ら影響はない。 Here, in order to confirm the durability of the paper discharge roller 5 and the spur roller 6, the spur roller 6 is brought into contact with the paper discharge roller 5 and a load of about 45 g is applied to the spur roller 6 20,000 times. The durability test corresponding to the recording paper feed was performed. In an actual ink jet printer, the load applied to the spur roller 6 is about 20 to 25 g. FIG. 4 shows an enlarged view of the main part of the spur roller 6 after the durability test. The wear of the sharp part 6a of the spur roller 6 is negligible, and the spur roller corresponding part 14 has a spur on the surface thereof. A large number of minute irregularities were generated by the roller 6, but these minute irregularities were within the range of the irregularities caused by the hard particles 13, so there was no influence on the conveyance of the recording paper P.
尚、前記の送紙ローラ３の構造は、排紙ローラ５の構造と同様の構造であるが、送紙ローラ３には拍車ローラ対応部１４が形成されていない。 The structure of the paper feed roller 3 is the same as that of the paper discharge roller 5, but the spur roller corresponding portion 14 is not formed on the paper feed roller 3.
以上説明した排紙ローラ５の作用、効果について説明する。
この排紙ローラ５の表面には、多数の硬質粒子１３が露出状に設けられているため、記録紙Ｐに対する排紙ローラ５の摩擦係数が大きくなる。合成樹脂摩擦コート層１２は、温度変化や汚れや劣化により摩擦特性が変化することもないので、記録紙搬送特性が格段に向上する。しかも、合成樹脂被覆層１１を形成してあるため、拍車ローラ６がローラ本体１０の金属製の硬い管材と接触することもなく、拍車ローラ６の耐久性が低下することもない。
The operation and effect of the paper discharge roller 5 described above will be described.
Since a large number of hard particles 13 are exposed on the surface of the paper discharge roller 5, the coefficient of friction of the paper discharge roller 5 with respect to the recording paper P increases. Since the synthetic resin friction coat layer 12 does not change its friction characteristics due to temperature change, dirt or deterioration, the recording paper conveyance characteristics are remarkably improved. In addition, since the synthetic resin coating layer 11 is formed, the spur roller 6 does not come into contact with the metal hard tube material of the roller body 10, and the durability of the spur roller 6 does not decrease.
しかも、排紙ローラ５が送紙ローラ３とほぼ同構造で、摩擦特性、記録紙搬送特性が送紙ローラ３とほぼ同じであるため、写真等を縁なしで印刷する際に、記録紙Ｐの端部が送紙ローラ３から離れる時に印刷画像に筋が発生することがなく、印刷の品質を飛躍的に高めることができる。また、ローラ本体１０は円管状の管材（断面円形のパイプ材）で構成されるため、格段に軽量化することができるうえ、製作費を低減することができる。
また、ローラ本体１０が合成樹脂被覆層１１で覆われているため、ローラ本体１０にメッキ処理を施す必要がないから環境面で好ましい。
In addition, since the paper discharge roller 5 has substantially the same structure as the paper feed roller 3 and the friction characteristics and recording paper transport characteristics are almost the same as those of the paper feed roller 3, the recording paper P can be printed when printing a photo or the like without borders. No streaks are produced in the printed image when the end of the sheet is separated from the paper feed roller 3, and the printing quality can be dramatically improved. Moreover, since the roller main body 10 is comprised with a tubular tube material (pipe material with a circular cross section), the weight can be remarkably reduced and the manufacturing cost can be reduced.
Moreover, since the roller main body 10 is covered with the synthetic resin coating layer 11, it is not necessary to perform plating on the roller main body 10, which is preferable in terms of environment.
次に、実施例２の排紙ローラについて説明する。
図５に示すように、この排紙ローラ５Ａは、ローラ本体１０と合成樹脂被覆層１１については実施例１の排紙ローラ５と同様であるが、実施例１の排紙ローラ５のように例えば４つの拍車ローラ対応部１４を形成することなく、排紙ローラ５Ａの記録に接する領域のほぼ全部の表面に合成樹脂摩擦コート層１２を形成したものである。尚、合成樹脂摩擦コート層１２の構造自体は実施例１の排紙ローラ５と同様である。
Next, the paper discharge roller according to the second embodiment will be described.
As shown in FIG. 5, the discharge roller 5A is similar to the discharge roller 5 of the first embodiment with respect to the roller body 10 and the synthetic resin coating layer 11, but like the discharge roller 5 of the first embodiment. For example, the synthetic resin friction coat layer 12 is formed on almost the entire surface of the region in contact with the recording of the paper discharge roller 5A without forming the four spur roller corresponding portions 14. The structure itself of the synthetic resin friction coat layer 12 is the same as that of the paper discharge roller 5 of the first embodiment.
ここで、排紙ローラ５Ａと拍車ローラ６の耐久性の確認のため、拍車ローラ６を排紙ローラ５Ａに当接させ、拍車ローラ６に約４５ｇの荷重を掛けた状態で、20000 回の記録紙送りに対応する耐久試験を実行した。この耐久試験後の拍車ローラ６の要部を図７に示すが、拍車ローラ６の尖鋭部６ａの片側（図では左側）に微小な摩耗痕が発生しただけで、拍車ローラ６の摩耗は無視し得る程度であった。拍車ローラ６が接触する合成樹脂摩擦コート層１２の表面には、拍車ローラ６により多数の凹凸が発生したが、それらの凹凸は、硬質粒子１３による凹凸の範囲内のものであったため、記録紙の搬送に何ら影響はない。 Here, in order to confirm the durability of the paper discharge roller 5A and the spur roller 6, the spur roller 6 is brought into contact with the paper discharge roller 5A and a load of about 45 g is applied to the spur roller 6 to record 20000 times. A durability test corresponding to paper feeding was performed. The main part of the spur roller 6 after this durability test is shown in FIG. 7, but only a small wear mark is generated on one side (left side in the drawing) of the spur roller 6 and the spur roller 6 is ignored. It was possible. On the surface of the synthetic resin friction coating layer 12 with which the spur roller 6 comes into contact, a large number of irregularities were generated by the spur roller 6, but these irregularities were within the range of the irregularities due to the hard particles 13, so that the recording paper There is no effect on the transport of
この排紙ローラ５Ａの作用、効果は前記排紙ローラ５と基本的に同様である。 但し、拍車ローラ対応部１４を形成しないから合成樹脂摩擦コート１２の形成の際に、マスキングする必要がなく、前記排紙ローラ５よりも製作費を低減することができる。 The operation and effect of the paper discharge roller 5A are basically the same as those of the paper discharge roller 5. However, since the spur roller corresponding portion 14 is not formed, it is not necessary to perform masking when forming the synthetic resin friction coat 12, and the manufacturing cost can be reduced as compared with the paper discharge roller 5.
次に、前記実施例を部分的に変更する例について説明する。
１］前記合成樹脂摩擦コート層１２を形成する方法として、次ぎのような静電塗装技術を採用することができる。即ち、ローラ本体１０の合成樹脂被覆層１１の表面に適当な厚さの導電性合成樹脂被膜を形成後、その導電性合成樹脂被膜の表面に硬質粒子を含む合成樹脂粉体を静電塗装し、その後加熱により焼き付けることで合成樹脂摩擦コート層１２を形成することができる。
Next, an example in which the above embodiment is partially changed will be described.
1] As a method of forming the synthetic resin friction coat layer 12, the following electrostatic coating technique can be employed. That is, after a conductive synthetic resin film having an appropriate thickness is formed on the surface of the synthetic resin coating layer 11 of the roller body 10, a synthetic resin powder containing hard particles is electrostatically coated on the surface of the conductive synthetic resin film. Then, the synthetic resin friction coat layer 12 can be formed by baking by heating.
この場合、硬質粒子１３の粒径を６０〜１５０μｍの範囲の所定の粒径、合成樹脂摩擦コート１２の膜厚を硬質粒子１３の粒径の約半分（好ましくは、４０〜７５μｍ）程度にすることが望ましい。尚、前記の静電塗装の際、紫外線硬化性の合成樹脂粉体に、硬質粒子の粉体を混合したものを静電塗装し、その後紫外線照射により、合成樹脂摩擦コート層１２を形成することもできる。 In this case, the particle size of the hard particles 13 is a predetermined particle size in the range of 60 to 150 μm, and the film thickness of the synthetic resin friction coat 12 is about half of the particle size of the hard particles 13 (preferably 40 to 75 μm). It is desirable. In the electrostatic coating, the synthetic resin friction coat layer 12 is formed by electrostatic coating of ultraviolet curable synthetic resin powder mixed with hard particle powder, followed by ultraviolet irradiation. You can also.
２］前記実施例１，２におけるローラ本体１０を構成する円管状管材は合成樹脂やセラミック製としてもよいし、また、ローラ本体１０を構成する円管状管材の代わりに、金属製又は非金属（合成樹脂やセラミック等）製の中実丸棒状のローラ本体を採用してもよい。
３］前記実施例１，２における、合成樹脂被覆層１１や合成樹脂摩擦コート１２に採用する合成樹脂材料は、一例にすぎず前記実施例１，２の記載した以外の種々の合成樹脂材料を適用可能である。
2] The tubular tubular material constituting the roller body 10 in the first and second embodiments may be made of synthetic resin or ceramic, and instead of the tubular tubular material constituting the roller body 10, it is made of metal or non-metal ( A solid round bar-shaped roller body made of synthetic resin or ceramic may be used.
3] The synthetic resin materials employed in the synthetic resin coating layer 11 and the synthetic resin friction coat 12 in Examples 1 and 2 are merely examples, and various synthetic resin materials other than those described in Examples 1 and 2 are used. Applicable.
１ 記録ヘッド
５，５Ａ 排紙ローラ
６ 拍車ローラ
１０ ローラ本体
１１ 合成樹脂被覆層
１２ 合成樹脂摩擦コート層
１３ 硬質粒子
１４ 拍車ローラ対応部
DESCRIPTION OF SYMBOLS 1 Recording head 5,5A Paper discharge roller 6 Spur roller 10 Roller main body 11 Synthetic resin coating layer 12 Synthetic resin friction coating layer 13 Hard particle 14 Spur roller corresponding part
Claims (4)
前記排紙ローラは、円管状又は中実丸棒状のローラ本体と、
このローラ本体の表面に形成された合成樹脂被覆層と、
この合成樹脂被覆層の少なくとも一部の表面に形成された合成樹脂摩擦コート層であって多数の硬質粒子を含む合成樹脂摩擦コート層と、
を備えたことを特徴とするプリンタの排紙ローラ。 In the paper discharge roller that sends the recording paper in cooperation with a plurality of spur rollers on the downstream side in the recording paper conveyance direction from the recording head of the printer,
The paper discharge roller includes a roller body having a circular or solid round bar shape,
A synthetic resin coating layer formed on the surface of the roller body;
A synthetic resin friction coating layer formed on at least a part of the surface of the synthetic resin coating layer, the synthetic resin friction coating layer including a large number of hard particles; and
A discharge roller for a printer, comprising:
The discharge roller corresponds to a plurality of spur rollers corresponding to a plurality or a plurality of groups of spur rollers, and corresponds to a plurality of spur rollers in which a synthetic resin coating layer is exposed without forming a synthetic resin friction coating layer. The paper discharge roller of the printer according to claim 2, wherein a portion is formed.
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