JP2880577B2 - Plain bearing - Google Patents
Plain bearingInfo
- Publication number
- JP2880577B2 JP2880577B2 JP40598890A JP40598890A JP2880577B2 JP 2880577 B2 JP2880577 B2 JP 2880577B2 JP 40598890 A JP40598890 A JP 40598890A JP 40598890 A JP40598890 A JP 40598890A JP 2880577 B2 JP2880577 B2 JP 2880577B2
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- carbon fiber
- bearing portion
- metal
- carbon fibers
- 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 - Lifetime
Links
Landscapes
- Sliding-Contact Bearings (AREA)
- Lubricants (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えばプリンタやファ
クシミリ等の事務機器などの回転軸の軸受として使用さ
れるすべり軸受に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding bearing used as a bearing for a rotating shaft of office equipment such as a printer and a facsimile.
【０００２】[0002]
【従来の技術】従来より、事務機器として例えば用紙の
搬送等の動作を行なう各種のプリンタやファクシミリな
どが使用されている。この種の事務機器の可動部分に
は、回転動作を行なう小さな金属製の回転軸が用いら
れ、この回転軸の軸受として例えば小型のすべり軸受が
使用されている。そして、すべり軸受の素材としては、
摩擦係数が小さくかつ耐摩耗性に優れ、しかも軽量であ
ることが望ましいという観点から、合成樹脂製のものが
採用されている。2. Description of the Related Art Heretofore, various printers and facsimile machines which perform operations such as paper transport have been used as office equipment. 2. Description of the Related Art A small metal rotating shaft that performs a rotating operation is used for a movable portion of this type of office equipment, and a small sliding bearing, for example, is used as a bearing for the rotating shaft. And as the material of the sliding bearing,
From the viewpoint that it is desirable that the friction coefficient is small, the wear resistance is excellent, and the weight is low, a synthetic resin is used.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、近年で
は、例えば各種のプリンタ等による高速の印刷が要求さ
れているので、従来のすべり軸受では必ずしも耐摩耗性
等の耐久性が十分ではないという問題があった。However, in recent years, high-speed printing by, for example, various printers has been required, and therefore, there has been a problem that conventional slide bearings do not always have sufficient durability such as wear resistance. there were.
【０００４】また、樹脂製のすべり軸受を使用した事務
機器等では、その内部で発生した静電気が溜りやすいの
で、突然に多量の静電気が流れて快適な機器の使用が妨
げられるという問題があった。更に場合によっては、静
電気により電気的信号として蓄えられた情報或は送信さ
れた情報が損なわれることがあった。[0004] Further, in office equipment and the like using a resin sliding bearing, static electricity generated inside tends to accumulate, so that a large amount of static electricity suddenly flows, which hinders the use of comfortable equipment. . Further, in some cases, information stored as an electrical signal or transmitted information may be damaged by static electricity.
【０００５】本発明は、上記課題を解決し、耐久性に富
み、しかも静電気を逃がすことができるすべり軸受を提
供することを目的とする。An object of the present invention is to solve the above-mentioned problems and to provide a sliding bearing which is rich in durability and can release static electricity.
【０００６】[0006]
【課題を解決するための手段】即ち、上記目的を達する
ためになされた本発明は、回転軸に接触する樹脂製の軸
受部を備えたすべり軸受において、９５０〜１３００℃
の炉内で、炭化水素を熱分解する気相法によって、粒径
０.０２μｍ〜０.０３μｍの高融点金属及び／又は該金
属の化合物の超微細粉末を成長開始剤として、直径０.
１μｍ〜０.５μｍ，長さ０.１〜１ｍｍに成長させた炭
素繊維を、前記軸受部に加用するとともに、前記炭素繊
維を前記軸受部の内周面に露出させたことを特徴とする
すべり軸受けを要旨とする。[SUMMARY OF Namely, the present invention has been made in order to achieve the above object, in a sliding bearing having a bearing portion of the resin in contact with the rotary shaft, 950-1,300 ° C.
In a furnace, the particle size is determined by the gas phase method of pyrolyzing hydrocarbons.
0.02 μm to 0.03 μm high melting point metal and / or gold
Genus compound as a growth initiator, with
A carbon fiber grown to a length of 1 μm to 0.5 μm and a length of 0.1 to 1 mm is added to the bearing portion and the carbon fiber is
A gist of the present invention is characterized in that the fiber is exposed on the inner peripheral surface of the bearing portion .
【０００７】ここで、樹脂製の軸受部としては、耐摩耗
性等に優れた各種の素材からなるものを採用できる。例
えば、ナイロン，ＡＢＳ樹脂等である。また、上記炭素
繊維は、ポリアクリロニトリル系炭素繊維又はピッチ系
炭素繊維と異なり、高融点金属及び／又はその化合物の
超微細粉末の直径と略等しい微小直径のウィスカ状に生
成されたものである。Here, as the resin bearing part, one made of various materials excellent in wear resistance and the like can be adopted. For example, nylon, ABS resin and the like. Further, the carbon fiber is different from polyacrylonitrile-based carbon fiber or pitch-based carbon fiber, and is formed into a whisker-like shape having a minute diameter substantially equal to the diameter of the ultrafine powder of the high melting point metal and / or its compound.
【０００８】更に、本発明に用いる高融点金属は、炭素
水素の熱分解の温度である９５０〜１３００℃において
気化しない金属であって、ＴｉやＺｒ等の周期律表の第
４ａ族，ＶやＮｂ等の第５ａ族，ＣｒやＭｏ等の第６ａ
族，Ｍｎ等の第７ａ族，ＦｅやＣｏ等の第８族の元素が
適し、特に望ましいのは、Ｆｅ，Ｃｏ，Ｎｉ，Ｖ，Ｎ
ｂ，Ｔａ，Ｔｉ，Ｚｒである。そして、かかる金属の化
合物には、その酸化物，窒化物，その他の塩類がある。Further, the refractory metal used in the present invention is a metal which does not vaporize at a temperature of 950 to 1300 ° C., which is the thermal decomposition temperature of carbon and hydrogen, and belongs to Group 4a of the periodic table such as Ti and Zr, V and Group 5a such as Nb and group 6a such as Cr and Mo
Group, elements of group 7a such as Mn, and elements of group 8 such as Fe and Co are particularly preferable. Fe, Co, Ni, V, N
b, Ta, Ti, and Zr. Such metal compounds include oxides, nitrides, and other salts.
【０００９】また、上記炭素繊維の表面に、錫等のメッ
キを施してもよく、この場合は、炭素繊維の分散性が優
れているので好適である。Further, the surface of the carbon fiber may be plated with tin or the like, and this case is preferable because the carbon fiber has excellent dispersibility.
【００１０】[0010]
【作用】本発明のすべり軸受は、樹脂製の軸受部に上記
の炭素繊維を加用したものである。上記炭素繊維には規
則正しい黒鉛結晶層が形成されているので、炭素繊維固
有の特性である引っ張り強度等の機械的特性に優れてい
る。また、この微細な炭素繊維は樹脂に対する親和性が
いいので、炭素繊維が樹脂製の軸受部中に分散して存在
し、機械的強度が著しく向上し亀裂の発生を防止する。
更に、上記炭素繊維は耐摩耗性に優れているので耐久性
に富み、特に炭素繊維が表面に露出した軸受部の内周面
では、潤滑性能を向上させる。その上、上記炭素繊維は
適度な導電性を備えているので、発生した静電気を逃が
して蓄積を防止する。The sliding bearing of the present invention is obtained by adding the above-mentioned carbon fibers to a resin bearing portion. Since a regular graphite crystal layer is formed on the carbon fiber, the carbon fiber is excellent in mechanical properties such as tensile strength, which are inherent properties of the carbon fiber. Further, since the fine carbon fibers have a good affinity for the resin, the carbon fibers are dispersed and exist in the resin-made bearing portion, so that the mechanical strength is remarkably improved and the generation of cracks is prevented.
Further, the carbon fiber is excellent in wear resistance, so that it has high durability, and particularly , the inner peripheral surface of the bearing portion where the carbon fiber is exposed on the surface.
Then, the lubrication performance is improved. In addition, since the carbon fiber has an appropriate conductivity, the generated static electricity is released to prevent accumulation.
【００１１】[0011]
【実施例】以下、本発明の一実施例を図面とともに説明
する。図１は、本発明が適用されたすべり軸受１を示し
ている。An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a plain bearing 1 to which the present invention is applied.
【００１２】図１に示すように、すべり軸受１は薄い肉
厚の円筒状の軸受であり、すべり軸受１の貫通孔２内に
は、金属製の回転軸３が回転自在に嵌挿されている。こ
のすべり軸受１は、例えばナイロン等からなる硬質の合
成樹脂から形成されており、この合成樹脂には、下記の
様な微細な炭素繊維５が分散して含有されている。従っ
て、すべり軸受１の貫通孔２の内周面６には、炭素繊維
５が露出している。As shown in FIG. 1, a sliding bearing 1 is a cylindrical bearing having a small thickness, and a rotating shaft 3 made of metal is rotatably inserted into a through hole 2 of the sliding bearing 1. I have. The sliding bearing 1 is formed of a hard synthetic resin made of, for example, nylon or the like, and the synthetic resin contains fine carbon fibers 5 dispersed as described below. Therefore, the carbon fibers 5 are exposed on the inner peripheral surface 6 of the through hole 2 of the plain bearing 1.
【００１３】また、このすべり軸受１は、図２に示す様
に、例えばハウジング８を介して事務機器の支持壁９に
取り付けられるか、或は直接に支持壁９に取り付けられ
ている。As shown in FIG. 2, the slide bearing 1 is mounted on a support wall 9 of office equipment via a housing 8, for example, or is directly mounted on the support wall 9.
【００１４】次に、このすべり軸受１の製造方法につい
て説明する。まず、９５０〜１３００℃の炉内で、ベン
ゼンを熱分解する気相法によって、粒径０．０２〜０．
０３μｍの鉄粉末を成長開始剤として、直径０．１〜
０．５μｍ，長さ０．１〜１mmの炭素繊維を成長させる
ことにより、本実施例で使用される微細な炭素繊維５を
製造する。Next, a method of manufacturing the plain bearing 1 will be described. First, in a furnace at 950 to 1300 ° C., a particle size of 0.02 to 0.5 μm is obtained by a gas phase method of thermally decomposing benzene.
A diameter of 0.1 to 0.3 μm is used as a growth initiator.
By growing carbon fibers having a length of 0.5 μm and a length of 0.1 to 1 mm, fine carbon fibers 5 used in this embodiment are manufactured.
【００１５】一方、この炭素繊維５を混入する合成樹脂
（例えばナイロンやＡＢＳ樹脂等）の材料を製造する方
法は、例えば下記の様である。即ち、合成樹脂のペレッ
トと炭素繊維５とを、ヘンシャルミキサーやスーパーミ
キサー等を使用してドライブレンドし、次に、ドライブ
レンドによって形成された粉状物を、単軸又は二軸押出
機で混練し、その後、断面丸か角のストランドとして押
し出し、次いで切断機で適当な長さに切断して行う。On the other hand, a method for producing a material of a synthetic resin (for example, nylon or ABS resin) into which the carbon fiber 5 is mixed is, for example, as follows. That is, the synthetic resin pellets and the carbon fibers 5 are dry-blended using a Hensial mixer, a super mixer, or the like, and then the powdery material formed by the dry blending is subjected to a single-screw or twin-screw extruder. After kneading, the extruded material is extruded as a strand having a round or square cross section, and then cut into a suitable length by a cutter.
【００１６】そして、上述した方法で製造した合成樹脂
の材料、即ち、炭素繊維５を含有した合成樹脂の材料を
使用して、周知の射出成形等によって、所定のすべり軸
受１の形状に形成する。The material of the synthetic resin produced by the above-mentioned method, that is, the material of the synthetic resin containing the carbon fiber 5, is formed into a predetermined shape of the plain bearing 1 by well-known injection molding or the like. .
【００１７】この様にして形成されたすべり軸受１は、
その内部に炭素繊維５を含むとともに、その内周面６に
炭素繊維５が露出する構造となる。従って、すべり軸受
１の貫通孔２に回転軸３を嵌挿して用いると、回転軸３
を高速で回転させて使用しても、回転し易くしかも摩耗
し難いという利点がある。また、この炭素繊維５には適
度な導電性があり、機器内部で発生した静電気を好適に
逃がすことができるので、機器の使用時の静電気による
不快感を低減でき、しかも静電気による電子機器の誤動
作を防止できるという効果がある。The sliding bearing 1 thus formed is
It has a structure in which the carbon fibers 5 are contained therein and the carbon fibers 5 are exposed on the inner peripheral surface 6 thereof. Therefore, when the rotating shaft 3 is inserted into the through hole 2 of the plain bearing 1 and used, the rotating shaft 3
There is an advantage that even when used at high speed, it is easy to rotate and hard to wear. In addition, the carbon fiber 5 has an appropriate conductivity, and can appropriately discharge static electricity generated inside the device, so that discomfort caused by static electricity during use of the device can be reduced, and malfunction of the electronic device due to the static electricity can be reduced. There is an effect that can be prevented.
【００１８】以上本発明の実施例について説明したが、
本発明はこのような実施例に何等限定されるものではな
く、本発明の要旨を逸脱しない範囲内において種々なる
態様で実施し得ることは勿論である。The embodiments of the present invention have been described above.
The present invention is not limited to such embodiments at all, and it goes without saying that the present invention can be implemented in various modes without departing from the gist of the present invention.
【００１９】例えば、炭素繊維５をすべり軸受１の貫通
孔２の内周面６上に多く露出させるために、周知の金属
製すべり軸受の軸受合金部を製造する様に、遠心力を利
用して製造してもよい。For example, in order to expose a large amount of the carbon fiber 5 on the inner peripheral surface 6 of the through hole 2 of the plain bearing 1, centrifugal force is used to produce a bearing alloy part of a well-known metallic plain bearing. May be manufactured.
【００２０】この遠心力を利用する方法とは、例えば裏
金に相当する円筒の部材を回転させるとともに、その円
筒の部材の貫通孔の中心から、炭素繊維５を含んだ溶融
した合成樹脂を貫通孔の内周面に流して、内周面の表面
を均一に覆うように付着させるものである。The method of utilizing the centrifugal force is to rotate a cylindrical member corresponding to, for example, a backing metal, and to melt a synthetic resin containing carbon fibers 5 from the center of the through hole of the cylindrical member. And adheres so as to uniformly cover the surface of the inner peripheral surface.
【００２１】尚、静電気を逃がす特性を向上させるため
に、上記炭素繊維５の表面に、電気メッキや無電界メッ
キ等によってＣｕやＡｇ等のメッキを施してもよい。The surface of the carbon fiber 5 may be plated with Cu, Ag, or the like by electroplating, electroless plating, or the like, in order to improve the property of releasing static electricity.
【００２２】[0022]
【発明の効果】以上詳記したように、本発明のすべり軸
受は、上記の様にして製造した炭素繊維を樹脂製の軸受
部に加用し、軸受部の内周面に炭素繊維を露出させたも
のであるので、潤滑性能や耐摩耗性に優れ、更に機械的
強度も大きい。また、炭素繊維は適度な導電性を有して
いるので、機器内部で発生した静電気を好適に逃がすこ
とができ、機器の静電気による不快感を低減するととも
に、電子機器の誤動作を防止することができる。As described in detail above, in the sliding bearing of the present invention, the carbon fiber produced as described above is applied to a resin bearing , and the carbon fiber is exposed on the inner peripheral surface of the bearing. Because it was made, it has excellent lubrication performance and abrasion resistance, and also has high mechanical strength. In addition, since carbon fibers have appropriate conductivity, static electricity generated inside the device can be appropriately released, reducing discomfort caused by the static electricity of the device and preventing malfunction of the electronic device. it can.
【図１】本発明の実施例のすべり軸受の使用状態を示す
一部破断斜視図である。FIG. 1 is a partially broken perspective view showing a use state of a slide bearing according to an embodiment of the present invention.
【図２】支持壁に取り付けられたすべり軸受を示す断面
図である。FIG. 2 is a cross-sectional view showing a slide bearing attached to a support wall.
１…すべり軸受 ２…貫通孔 ３…回転軸 ５…炭素繊維 DESCRIPTION OF SYMBOLS 1 ... Slide bearing 2 ... Through-hole 3 ... Rotary shaft 5 ... Carbon fiber
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｃ１０Ｎ 40:02 70:00 (58)調査した分野(Int.Cl.6，ＤＢ名) C10M 25/02 C10N 20:06 C10N 40:02 C08K 7/06 ──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. 6 identification code FI C10N 40:02 70:00 (58) Investigated field (Int.Cl. 6 , DB name) C10M 25/02 C10N 20:06 C10N 40:02 C08K 7/06
Claims (1)
たすべり軸受において、９５０〜１３００℃の炉内で、炭化水素を熱分解する気
相法によって、粒径０.０２μｍ〜０.０３μｍの高融点
金属及び／又は該金属の化合物の超微細粉末を成長開始
剤として、直径０.１μｍ〜０.５μｍ，長さ０.１〜１
ｍｍに 成長させた炭素繊維を、前記軸受部に加用すると
ともに、 前記炭素繊維を前記軸受部の内周面に露出させたこと を
特徴とするすべり軸受け。1. A plain bearing having a resin bearing portion in contact with a rotating shaft, wherein a gas that thermally decomposes hydrocarbons in a furnace at 950 to 1300 ° C.
High melting point with particle size of 0.02 μm to 0.03 μm by phase method
Start growing ultrafine powder of metal and / or compound of the metal
The agent has a diameter of 0.1 μm to 0.5 μm and a length of 0.1 to 1
carbon fibers grown mm, Then for addition to the bearing portion
In both cases , the carbon fiber is exposed on the inner peripheral surface of the bearing portion .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40598890A JP2880577B2 (en) | 1990-12-25 | 1990-12-25 | Plain bearing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP40598890A JP2880577B2 (en) | 1990-12-25 | 1990-12-25 | Plain bearing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04222897A JPH04222897A (en) | 1992-08-12 |
| JP2880577B2 true JP2880577B2 (en) | 1999-04-12 |
Family
ID=18515615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP40598890A Expired - Lifetime JP2880577B2 (en) | 1990-12-25 | 1990-12-25 | Plain bearing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2880577B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6189413B1 (en) * | 1999-07-12 | 2001-02-20 | American Axle & Manufacturing, Inc. | Captive molding with dissimilar material insert |
-
1990
- 1990-12-25 JP JP40598890A patent/JP2880577B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04222897A (en) | 1992-08-12 |
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