JPH0464956A - Guide roller - Google Patents
Guide rollerInfo
- Publication number
- JPH0464956A JPH0464956A JP2178276A JP17827690A JPH0464956A JP H0464956 A JPH0464956 A JP H0464956A JP 2178276 A JP2178276 A JP 2178276A JP 17827690 A JP17827690 A JP 17827690A JP H0464956 A JPH0464956 A JP H0464956A
- Authority
- JP
- Japan
- Prior art keywords
- support shaft
- bearing
- roller body
- contact area
- contact
- 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
- 230000002159 abnormal effect Effects 0.000 abstract description 6
- 230000002093 peripheral effect Effects 0.000 abstract description 6
- 230000010361 irregular oscillation Effects 0.000 abstract 2
- 230000001788 irregular Effects 0.000 description 4
- 229910001369 Brass Inorganic materials 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
Landscapes
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
Abstract
Description
この発明は、ビデオテープ等の磁気記録テープの案内等
に用いられるガイドローラに関する。The present invention relates to a guide roller used for guiding a magnetic recording tape such as a video tape.
従来、ビデオテープレコーダ（ＶＴＲ）のテプ走行系に
は、磁気記録テープの走行を案内するカイトローラが設
置されている。このガイトローラには、例えば、第３図
に示すように、被移送体としての磁気記録テープの移送
を案内するローラ本体２が設置されている。このローラ
本体２ば、黄銅やステンレス等の金属で円筒形に形成さ
れ、その内部に合成樹脂で形成された円筒形の軸受４を
取り付けて支持軸６に回転可能に支持されている。支持
軸６はＶＴＲ側の支持部材８に固定され、その基端部側
には図示しないフランジが形成され、また、その頂部側
にはローラ本体２の抜は止めとしてフランジ１０が圧入
されている。2. Description of the Related Art Conventionally, a tape running system of a video tape recorder (VTR) is equipped with a kite roller that guides the running of a magnetic recording tape. For example, as shown in FIG. 3, this guide roller is provided with a roller body 2 that guides the transfer of a magnetic recording tape as an object to be transferred. The roller body 2 is formed into a cylindrical shape from a metal such as brass or stainless steel, and is rotatably supported by a support shaft 6 with a cylindrical bearing 4 made of synthetic resin attached therein. The support shaft 6 is fixed to a support member 8 on the VTR side, and a flange (not shown) is formed on its base end, and a flange 10 is press-fitted on its top side to prevent the roller body 2 from being pulled out. .
ところで、このようなガイドローラでは、第４図に示す
ように、ローラ本体２と軸受４とが別個に形成され、ロ
ーラ本体２の内部に軸受４を圧入することにより、ロー
ラ本体２と軸受４とが一体化されている。軸受４の軸受
孔４０には支持軸６が挿入され、支持軸６にば軸受４を
以てローラ本体２か回転可能に支持されている。
そして、軸受４の軸受孔４０の内径と支持軸６の外径は
、回転を可能にするため、前者を僅かに大きくした異な
る同心円で形成されているが、両者の差は極めて小さく
設定されているので、回転上、軸受４と支持軸６との接
触面積は大きい。このようなガイドローラに磁気記録テ
ープを掛は回して案内させた場合、軸受孔４０の内壁面
と支持軸６の外周面との接触部分の位置が磁気記録テー
プのテンションによって変動し、その変動のため、ロー
ラ本体２に不規則な振動が生し、この振動が異常音、い
わゆる鳴きの発生原因や磁気記録テブの案内が不安定に
なる原因となる。
そこで、この発明は、支持軸と軸受との接触面積を狭小
化して異常音の発生を防止し、被移送体の案内を安定化
したガイドローラの提供を目的とする。By the way, in such a guide roller, as shown in FIG. 4, the roller body 2 and the bearing 4 are formed separately, and by press-fitting the bearing 4 into the inside of the roller body 2, the roller body 2 and the bearing 4 are separated. are integrated. A support shaft 6 is inserted into the bearing hole 40 of the bearing 4, and the roller body 2 is rotatably supported by the support shaft 6 through the bearing 4. In order to enable rotation, the inner diameter of the bearing hole 40 of the bearing 4 and the outer diameter of the support shaft 6 are formed by different concentric circles with the former slightly larger, but the difference between the two is set to be extremely small. Therefore, the contact area between the bearing 4 and the support shaft 6 during rotation is large. When a magnetic recording tape is hung on such a guide roller, rotated, and guided, the position of the contact portion between the inner wall surface of the bearing hole 40 and the outer peripheral surface of the support shaft 6 changes depending on the tension of the magnetic recording tape. Therefore, irregular vibrations occur in the roller body 2, and these vibrations cause abnormal noise, so-called squealing, and cause unstable guidance of the magnetic recording tube. SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a guide roller that can reduce the contact area between a support shaft and a bearing, thereby preventing the generation of abnormal noise and stabilizing the guidance of a transported object.
即ち、この発明のガイドローラは、被移送体を案内する
ローラ本体（２）と、このローラ本体の中心軸」二に設
置された支持軸（６）と、前記ローラ本体の内壁面に固
定されて前記支持軸の外周面と接触して前記支持軸上に
前記ローラ本体を支持させるとともに、前記支持軸の外
周面との接触部分が前記支持軸の外周面の任意に等分さ
れた位置に設定された軸受（１４）とを備えてなること
を特徴とするものである。That is, the guide roller of the present invention includes a roller body (2) that guides a transported object, a support shaft (6) installed on the central axis of the roller body, and a support shaft (6) that is fixed to the inner wall surface of the roller body. The roller body is supported on the support shaft by contacting the outer peripheral surface of the support shaft, and the contact portion with the outer peripheral surface of the support shaft is located at an arbitrarily equally divided position on the outer peripheral surface of the support shaft. It is characterized by comprising a set bearing (14).
この発明のカイトローラでは、支持軸の外周面と、ロー
ラ本体に取りイ」けられている軸受との接触面積が狭小
化されているので、７内する帯状体のテンションによる
接触部分の変動か抑制されることになる。この結果、不
規則な振動か抑えられ、異常音が防止されて被移送体の
案内が安定化する。In the kite roller of the present invention, the contact area between the outer circumferential surface of the support shaft and the bearing installed in the roller body is narrowed, so that fluctuations in the contact area due to the tension of the strip inside 7 can be avoided. It will be suppressed. As a result, irregular vibrations are suppressed, abnormal noises are prevented, and the guidance of the transported object is stabilized.
以下、ごの発明を図面に示した実施例を参照して詳細に
説明する。
第１図は、この発明のガイドローラの一実施例を示す。
磁気記粍テープ等の帯状を成す被移送体の移送を案内す
るローラ本体２は、その周面に案内面２■が形成され、
その内部に同心円状の透孔２２が形成され、円筒体を成
している。ローラ本体２ば、被移送体の性質に対応し、
被移送体が磁気記録テープの場合には帯磁による磁気記
録テープへの磁気的な影響を防止するため、黄銅、ステ
ンし・ス等の金属や硬質プラスチック等で形成される。
このローラ本体２の透孔２２の内壁面には、軸受１４が
圧入され、ごの軸受１４には支持軸６を挿入してローラ
本体２を支持させるための軸受孔１４０が形成されてい
る。ごの軸受１４は、支持軸６によって円滑な回転を確
保するため、例えば合成樹脂によって形成されている。
軸受孔１４０は、第２図に示すように、真円又はその真
円に限りなく近い円を以て形成された円柱状を成す支持
軸６の外周面、即ち、円周面に接触する３面を以て形成
された近似正三角形状孔で形成されている。即ち、軸受
孔１４０の内壁面と支持軸６との接触部分が支持軸６の
外周面の任意に等分された位置、この実施例では１２０
度又は１２０度に近い角度に設定されている。
そして、支持軸６は、Ｖ Ｔ Ｒ側の支持部材８に固定
され、ローラ本体２に取りイー１けた軸受１４を以てロ
ーラ本体２を支持し、その頂部側には、Ｅｌｌシラ体２
の抜は止めとしてフランジ１０（第３図に図示）が圧入
されている。
このように構成すると、軸受１４の軸受孔１４０の内壁
面、実施例では平面部１４０ａ、１４０ｂ、１４０ｃに
支持軸６の外周面か選択的に接触するため、両者の接触
面は支持軸６の軸方向に線又は極めて幅の狭い接触面と
なり、接触面積の狭小化を図ることができる。
このよ・うに、軸受孔１４０の内壁面と支持軸６の外周
面との接触面が規制されるとともに、その接触面積の狭
小化により、磁気記録テープを掛は回してテンションを
作用させた場合に従来のガイドローラのように接触部分
がそのテンションによって変動することがなく、不規則
な振動の発生か防止できる。この結果、その振動による
異常音、いわゆる鳴きの発生がなくなり、案内動作の安
定化が図られる。
なお、実施例では、軸受１４と支持軸６との接触部分を
３点に設定した場合について説明したか、接触部分を規
制しかつ接触面積を狭小化することから、４点以上の接
触部分としてもよい。
また、被移送体として磁気記録テープを例に取って説明
したが、この発明のガイド′［コーラは、精密さが要求
される磁気記録テープ以外の帯状体の移送にも用いるこ
とができるものであり、磁気記録テープに限定されるも
のではない。
【発明の効果］
以上説明したように、この発明によれば、軸受と支持軸
との接触面積の狭小化により、ローラ本体に作用するテ
ンションによる接触部分の変動かなく、不規則な振動や
異常音の発生を防止できるとともに、被移送体の案内を
安定化することができる。Hereinafter, the invention will be described in detail with reference to embodiments shown in the drawings. FIG. 1 shows an embodiment of the guide roller of the present invention. A roller body 2 that guides the transfer of a belt-shaped object such as a magnetic recording tape has a guide surface 2 formed on its circumferential surface,
A concentric through-hole 22 is formed inside, forming a cylindrical body. The roller body 2 corresponds to the nature of the object to be transported,
When the object to be transported is a magnetic recording tape, it is made of metal such as brass, stainless steel, hard plastic, or the like in order to prevent magnetic influence on the magnetic recording tape due to magnetization. A bearing 14 is press-fitted into the inner wall surface of the through hole 22 of the roller body 2, and a bearing hole 140 is formed in the bearing 14 for inserting the support shaft 6 to support the roller body 2. The shaft bearing 14 is made of, for example, synthetic resin in order to ensure smooth rotation by the support shaft 6. As shown in FIG. 2, the bearing hole 140 has three surfaces in contact with the outer circumferential surface, that is, the circumferential surface, of the support shaft 6, which has a cylindrical shape that is a perfect circle or a circle as close as possible to the perfect circle. It is formed of approximately equilateral triangular holes. That is, the contact portion between the inner wall surface of the bearing hole 140 and the support shaft 6 is located at an arbitrarily evenly divided position on the outer circumferential surface of the support shaft 6, which is 120 in this embodiment.
degree or an angle close to 120 degrees. The support shaft 6 is fixed to a support member 8 on the VTR side, and supports the roller body 2 with a one-digit bearing 14 attached to the roller body 2, and an Ell sill body 2 is attached to the top side of the roller body 2.
A flange 10 (shown in FIG. 3) is press-fitted to prevent removal. With this configuration, the outer circumferential surface of the support shaft 6 selectively contacts the inner wall surface of the bearing hole 140 of the bearing 14, which is the flat surface portions 140a, 140b, and 140c in the embodiment. The contact surface becomes a line or extremely narrow in the axial direction, and the contact area can be reduced. In this way, the contact surface between the inner wall surface of the bearing hole 140 and the outer circumferential surface of the support shaft 6 is regulated, and by narrowing the contact area, when the magnetic recording tape is hung and rotated to apply tension. Unlike conventional guide rollers, the contact area does not fluctuate due to its tension, which prevents irregular vibrations. As a result, the generation of abnormal noises, so-called squeals, caused by the vibrations is eliminated, and the guiding operation is stabilized. In addition, in the embodiment, the case where the contact portion between the bearing 14 and the support shaft 6 is set at three points has been explained, or in order to restrict the contact portion and narrow the contact area, it is assumed that the contact portion is set at four or more points. Good too. In addition, although the description has been given using a magnetic recording tape as an example of the object to be transported, the guide of the present invention can also be used to transport belt-shaped objects other than magnetic recording tapes, which require precision. Yes, but not limited to magnetic recording tape. Effects of the Invention As explained above, according to the present invention, by narrowing the contact area between the bearing and the support shaft, there is no fluctuation in the contact area due to tension acting on the roller body, and irregular vibrations and abnormalities can be avoided. It is possible to prevent the generation of sound and to stabilize the guidance of the transported object.
第１図はこの発明のガイドローラの一実施例を示す一部
切断斜視図、
第２図は第１図に示したガイＩ・ローラの横断面図、
第３図は従来のガイドローラを示す斜視図、第４図は第
３図に示したガイドローラの横断面図である。
２・・・ローラ本体
６・・・支持軸
１４・・・軸受
第 １
図
第２図
第
図
弔
図Fig. 1 is a partially cutaway perspective view showing an embodiment of the guide roller of the present invention, Fig. 2 is a cross-sectional view of the guy I roller shown in Fig. 1, and Fig. 3 is a conventional guide roller. The perspective view and FIG. 4 are cross-sectional views of the guide roller shown in FIG. 3. 2...Roller body 6...Support shaft 14...Bearing No. 1 Fig. 2 Fig. Funeral diagram
Claims (1)
面と接触して前記支持軸上に前記ローラ本体を支持させ
るとともに、前記支持軸の外周面との接触部分が前記支
持軸の外周面の任意に等分された位置に設定された軸受
と、 を備えてなることを特徴とするガイドローラ。[Scope of Claims] A roller body that guides an object to be transported, a support shaft installed on a central axis of the roller body, and a support shaft fixed to an inner wall surface of the roller body and in contact with an outer circumferential surface of the support shaft. the roller body is supported on the support shaft, and a bearing in which a contact portion with the outer circumferential surface of the support shaft is set at an arbitrarily evenly divided position on the outer circumferential surface of the support shaft; A guide roller characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2178276A JPH0464956A (en) | 1990-07-05 | 1990-07-05 | Guide roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2178276A JPH0464956A (en) | 1990-07-05 | 1990-07-05 | Guide roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0464956A true JPH0464956A (en) | 1992-02-28 |
Family
ID=16045643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2178276A Pending JPH0464956A (en) | 1990-07-05 | 1990-07-05 | Guide roller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0464956A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11258327B2 (en) | 2017-09-21 | 2022-02-22 | Kabushiki Kaisha Toshiba | Rotating electric machine having magnetic wedge with planes and having differences in magnetic permeability |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5236906B2 (en) * | 1974-08-01 | 1977-09-19 | ||
| JPH0230138B2 (en) * | 1980-06-30 | 1990-07-04 | Mitsubishi Electric Corp |
-
1990
- 1990-07-05 JP JP2178276A patent/JPH0464956A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5236906B2 (en) * | 1974-08-01 | 1977-09-19 | ||
| JPH0230138B2 (en) * | 1980-06-30 | 1990-07-04 | Mitsubishi Electric Corp |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11258327B2 (en) | 2017-09-21 | 2022-02-22 | Kabushiki Kaisha Toshiba | Rotating electric machine having magnetic wedge with planes and having differences in magnetic permeability |
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