JPH0464953A - Guide roller - Google Patents
Guide rollerInfo
- Publication number
- JPH0464953A JPH0464953A JP2176615A JP17661590A JPH0464953A JP H0464953 A JPH0464953 A JP H0464953A JP 2176615 A JP2176615 A JP 2176615A JP 17661590 A JP17661590 A JP 17661590A JP H0464953 A JPH0464953 A JP H0464953A
- Authority
- JP
- Japan
- Prior art keywords
- bearing
- roller
- support shaft
- wall surface
- roller body
- 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
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000002159 abnormal effect Effects 0.000 description 6
- 230000001788 irregular Effects 0.000 description 5
- 229910001369 Brass Inorganic materials 0.000 description 2
- 239000010951 brass Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 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
- 230000000694 effects Effects 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Landscapes
- Rolls And Other Rotary Bodies (AREA)
Abstract
Description
この発明は、ビデオテープ等の磁気記録テープの移送等
に用いられるガイドローラに関する。The present invention relates to guide rollers used for transporting magnetic recording tapes such as video tapes.
従来、ビテオテープレコーク（ＶＴＲ）のテープ走行系
には、磁気記録テープの走行を案内するガイドローラが
設置されている。このガイド′ローラには、例えば、第
４図に示すように、被移送体として帯状を成す磁気記録
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は、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、
その基端部側にはフランジ１０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１２
が圧入されている。Conventionally, a tape running system of a video tape recorder (VTR) is provided with guide rollers for guiding the running of a magnetic recording tape. For example, as shown in FIG. 4, this guide' roller is provided with a roller body 2 that guides the transfer of a band-shaped 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,
A flange 10 is formed on the base end side, and a flange 12 is formed on the top side to prevent the roller body 2 from being pulled out.
is press-fitted.
ところで、このようなガイド′ローラでは、ローラ本体
２に円筒状を成す軸受４が圧入されており、この軸受４
の軸受孔４０には同径の円柱状を成す支持軸６が挿入さ
れ、支持軸６を以てローラ本体２が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、回転するローラ本体２側に固定されている軸
受４の軸受孔４０の内壁面と支持軸６との接触面は極め
て大きい。
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２、その変動のため、ローラ本体２に不規
則な振動が生じ、この振動が異常音、いわゆる鳴きの発
生や磁気記録テープの案内が不安定になる原因となる。
そこで、この発明は、支持軸の軸受との接触面積を狭小
化して異常音の発生を防止し、被移送体の案内の安定化
を図ったガイドローラの提供を目的とする。By the way, in such a guide roller, a cylindrical bearing 4 is press-fitted into the roller body 2.
A cylindrical support shaft 6 having the same diameter is inserted into the bearing hole 40, and the roller body 2 is rotatably supported by the support shaft 6. 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. The contact surface between the support shaft 6 and the inner wall surface of the bearing hole 40 of the bearing 4 fixed to the rotating roller main body 2 side is extremely large. When a magnetic recording tape is hung on such a guide roller and guided by rotating it, 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 tape2. Due to the fluctuations, irregular vibrations occur in the roller body 2, and these vibrations cause abnormal noises, so-called squealing, and unstable guidance of the magnetic recording tape. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a guide roller that reduces the contact area of a support shaft with a bearing, thereby preventing abnormal noises 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、このローラ本体に固定された円筒
状の軸受（４）と、この軸受の内壁面に接触して前記ロ
ーラ本体を支持するとともに、その中間部分に径小部（
１６２）を選択的に形成して前記軸受の内壁面との接触
面積が狭小化された支持軸（１６）とを備えてなるもの
である。That is, the guide roller of the present invention includes a roller body (2) that guides an object to be transported, a cylindrical bearing (4) fixed to this roller body, and a roller body that contacts the inner wall surface of this bearing. , and a small diameter part (
162) is selectively formed to reduce the contact area with the inner wall surface of the bearing.
この発明のガイドローラでは、口・−ラ本体に軸受が固
定され、軸受には同径の軸受孔が形成されている。この
軸受を介してローラ本体を支持すべき支持軸の中間部分
に径小部を選択的に形成したので、この径小部では軸受
の軸受孔の内壁面とか非接触状態となり、径小部の範囲
に応して軸受と支持軸との接触面積の狭小化が図られる
。
したがって、ローラ本体は狭小化された接触面積を持つ
支持軸を以て支持され１、案内する被移送体による接触
部分の変動が抑制されることになる。
この結果、不規則な振動が抑えられることにより異常音
が防止され、被移送体の移送の安定化が図られる。In the guide roller of the present invention, a bearing is fixed to the mouth/roller main body, and bearing holes of the same diameter are formed in the bearing. Since a small-diameter portion is selectively formed in the middle portion of the support shaft that supports the roller body through this bearing, this small-diameter portion is in a non-contact state with the inner wall surface of the bearing hole of the bearing. Depending on the range, the contact area between the bearing and the support shaft can be reduced. Therefore, the roller body is supported by the support shaft having a narrowed contact area 1, and fluctuations in the contact area due to the guided object are suppressed. As a result, irregular vibrations are suppressed, thereby preventing abnormal noise and stabilizing the transfer of the object to be transferred.
以下、こ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、この発明のガイトローラの一実施例を示す。
磁気記録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２２が形成され、
その内部に同径の透孔２４が形成され、円筒体を成して
いる。ローラ本体２は、被移送体の性質に対応し、被移
送体が磁気記録テブ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、ステンレス
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２４の内壁面には、その中心軸
上に設置される支持軸］６にローラ本体２を円滑に支持
させるため、円筒状を成す軸受４が圧入されている。軸
受４ば、支持軸１６によって円滑な回転を確保するため
、例えば硬質合成樹脂によって形成されている。
そして、支持軸１６は、軸受４の軸受孔４０の内壁面と
の接触面積を狭小化するため、その中間部分に径小部１
６２が形成されている。
この支持軸１６に形成ずべき湾曲凹部を成ず径小部１６
２ば、例えば第２図に示すように、支持軸１６の有効支
持部分の長さを１７とすると、ごの長さＬの４分の１の
長さＬ／４をその両端部に取り、１７／２の長さの範囲
を持つその中間部分に設定されている。この径小部１６
２の形状は、支持軸１６の円柱面を曲率Ｒで選択的に削
り取って径小化したものである。また、この支持軸１６
の径大部１６４から径小部１６２に至る部分には、曲率
ｒ１を以て緩やかな湾曲部１６６が形成されている。
そして、支持軸１６は、ＶＴＲ側の支持部材８に固定さ
れ、ローラ本体２に取り付けた軸受４を以てローラ本体
２を支持し、支持部材８側にはフランジ１０が形成され
、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１２が圧入されている。
このように構成すると、支持軸１６の中間部分に形成さ
れた径小部１６２を除き、その両側に位置する径大部１
６４と軸受４の軸受孔４０の内壁部とが接触することに
なり、軸受４と支持軸１６との接触面積の狭小化が図ら
れる。
このように、軸受孔４０の内壁面と支持軸１６の外周面
との接触面積を狭小化することにより、被移送体として
の磁気記録テープをコーラ本体２の案内面２２に掛は回
して支持軸ｊ６にテンションを作用させた場合、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
て変動するごとがなく、不規則な振動の発生を防止でき
る。したがって、ローラ本体２の振動による異常音、い
わゆる鳴きの発生がなく、案内動作の安定化が図られる
。
また、湾曲部１６６を形成しているので、コーラ本体２
に固定された軸受４の軸受孔４ｏに支持軸１６の挿入を
円滑に行うことができ、支持軸１６や軸受４の軸受孔４
０を損傷することがなく、信頼性の高いガイ１ζローラ
を得るごとができる。
次に、第３図は、この発明のカイトローラの他の実施例
を示す。
前記実施例では、支持軸１６の中間部に形成された径小
部１６２を湾曲凹部として形成したが、第３図に示すよ
うに、同径を成ず径小部］６２としてもよい。この場合
、径大部１６４と径小部１６２との半径の差をｄとする
と、径大部１６４から径小部１６２に至る湾曲部１６６
を前記実施例の湾曲部１６６より大きい曲率半径ｒ２
（＞ｒ、）で形成する。
このような形状の支持軸１６を用いても、前記実施例と
同様に不規則な振動の発生か防止され、ローラ本体２の
振動による異常音の発生がなく、案内動作の安定化が図
られる。
なお、実施例では、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、この発明のガイドローラは、精密
さが要求される磁気記録テープ以外の被移送体を移送す
る場合にその案内に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。Hereinafter, the present 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. The roller body 2 that guides the transfer of a belt-shaped object such as a magnetic recording tape has a guide surface 22 formed on its circumferential surface.
A through hole 24 of the same diameter is formed inside the tube, forming a cylindrical body. The roller body 2 is made of a metal such as brass or stainless steel or a hard material in order to prevent magnetic influence on the magnetic recording tape due to magnetization when the object to be transported is a magnetic recording tape. It is made of plastic, etc. A cylindrical bearing 4 is press-fitted into the inner wall surface of the through hole 24 of the roller body 2 in order to smoothly support the roller body 2 on a support shaft 6 installed on the central axis thereof. The bearing 4 is made of, for example, hard synthetic resin to ensure smooth rotation by the support shaft 16. In order to reduce the contact area with the inner wall surface of the bearing hole 40 of the bearing 4, the support shaft 16 has a small diameter portion in the middle portion thereof.
62 is formed. The small diameter portion 16 does not form a curved recess that should be formed in this support shaft 16.
2. For example, as shown in FIG. 2, if the length of the effective support portion of the support shaft 16 is 17, a length L/4, which is one-fourth of the length L of the shaft, is taken at both ends. It is set in the middle part with a length range of 17/2. This small diameter portion 16
The shape of No. 2 is obtained by selectively cutting off the cylindrical surface of the support shaft 16 with a curvature R to reduce the diameter. In addition, this support shaft 16
A gentle curved portion 166 with a curvature r1 is formed in a portion extending from the large diameter portion 164 to the small diameter portion 162. The support shaft 16 is fixed to a support member 8 on the VTR side, and supports the roller body 2 using a bearing 4 attached to the roller body 2. A flange 10 is formed on the support member 8 side, and a flange 10 is formed on the top side of the support shaft 16. A flange 12 is press-fitted to prevent the roller body 2 from being removed. With this configuration, excluding the small diameter portion 162 formed at the middle portion of the support shaft 16, the large diameter portions 1 located on both sides thereof
64 and the inner wall of the bearing hole 40 of the bearing 4 come into contact with each other, thereby reducing the contact area between the bearing 4 and the support shaft 16. In this way, by narrowing the contact area between the inner wall surface of the bearing hole 40 and the outer circumferential surface of the support shaft 16, the magnetic recording tape as an object to be transported can be hung on the guide surface 22 of the core body 2 and supported. When tension is applied to the shaft j6, unlike conventional guide rollers, the contact portion does not fluctuate due to the tension, and irregular vibrations can be prevented. Therefore, there is no abnormal noise caused by vibration of the roller body 2, so-called squealing, and the guiding operation is stabilized. In addition, since the curved portion 166 is formed, the cola main body 2
The support shaft 16 can be smoothly inserted into the bearing hole 4o of the bearing 4 fixed to the support shaft 16 and the bearing hole 4o of the bearing 4.
It is possible to obtain a highly reliable guy 1ζ roller without damaging the roller. Next, FIG. 3 shows another embodiment of the kite roller of the present invention. In the embodiment described above, the small diameter portion 162 formed at the intermediate portion of the support shaft 16 is formed as a curved concave portion, but as shown in FIG. 3, it may be formed into a small diameter portion 62 without having the same diameter. In this case, if the difference in radius between the large-diameter portion 164 and the small-diameter portion 162 is d, then the curved portion 166 from the large-diameter portion 164 to the small-diameter portion 162
The radius of curvature r2 is larger than that of the curved portion 166 of the above embodiment.
(>r,). Even when using the support shaft 16 having such a shape, irregular vibrations are prevented from occurring as in the previous embodiment, and no abnormal noise is generated due to the vibration of the roller body 2, and the guiding operation is stabilized. . In the embodiments, a magnetic recording tape was used as an example of the object to be transported, but the guide roller of the present invention can be used to guide objects other than magnetic recording tapes that require precision. It can be used for, but is not limited to, magnetic recording tapes.
以上説明したように、この発明によれば、ローラ本体に
固定された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
がなく、不規則な振動や異常音の発生を防止でき、被移
送体の移送の安定化を図ることができる。As explained above, according to the present invention, by narrowing the contact area between the bearing fixed to the roller body and the support shaft,
The contact portion does not fluctuate due to the tension acting on the roller body, making it possible to prevent irregular vibrations and abnormal noises, and to stabilize the transfer of the object to be transferred.
第１図はこの発明のガイドローラの一実施例を示す縦断
面図、
第２図は第１図に示したガイトローラの支持軸の形状を
示す一部を切り欠いた断面図、第３図はこの発明のガイ
ドローラの他の実施例を示す一部を切り欠いた断面図、
第４図は従来のガイドローラを示す縦断面図である。
２・・・コーラ本体
４・・・軸受
１６・・・支持軸
１６２・・・径小部
第 １ 図FIG. 1 is a longitudinal sectional view showing an embodiment of the guide roller of the present invention, FIG. 2 is a partially cutaway sectional view showing the shape of the support shaft of the guide roller shown in FIG. 1, and FIG. FIG. 4 is a partially cutaway sectional view showing another embodiment of the guide roller of the present invention, and FIG. 4 is a longitudinal sectional view showing a conventional guide roller. 2...Cola main body 4...Bearing 16...Support shaft 162...Small diameter part Fig. 1
Claims (1)
の内壁面に接触して前記ローラ本体を支持するとともに
、その中間部分に径小部を選択的に形成して前記軸受の
内壁面との接触面積が狭小化された支持軸と、 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 cylindrical bearing fixed to the roller body; and a cylindrical bearing that contacts an inner wall surface of the bearing to support the roller body, and an intermediate portion thereof. A guide roller comprising: a support shaft in which a small diameter portion is selectively formed to reduce the contact area with the inner wall surface of the bearing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2176615A JPH0464953A (en) | 1990-07-04 | 1990-07-04 | Guide roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2176615A JPH0464953A (en) | 1990-07-04 | 1990-07-04 | Guide roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0464953A true JPH0464953A (en) | 1992-02-28 |
Family
ID=16016668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2176615A Pending JPH0464953A (en) | 1990-07-04 | 1990-07-04 | Guide roller |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0464953A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5702065A (en) * | 1994-01-21 | 1997-12-30 | Gigatek Memory Systems | Tape cartridge with reduced tangential drive force |
| US6969021B1 (en) * | 2004-02-17 | 2005-11-29 | Storage Technology Corporation | Variable curvature in tape guide rollers |
| US7085091B1 (en) | 2003-12-26 | 2006-08-01 | Storage Technology Corporation | Reducing tape media damage in data regions |
-
1990
- 1990-07-04 JP JP2176615A patent/JPH0464953A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5702065A (en) * | 1994-01-21 | 1997-12-30 | Gigatek Memory Systems | Tape cartridge with reduced tangential drive force |
| US5755392A (en) * | 1994-01-21 | 1998-05-26 | Gigatek Memory Systems | Tape cartridge with reduced tangential drive force |
| US7085091B1 (en) | 2003-12-26 | 2006-08-01 | Storage Technology Corporation | Reducing tape media damage in data regions |
| US6969021B1 (en) * | 2004-02-17 | 2005-11-29 | Storage Technology Corporation | Variable curvature in tape guide rollers |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5501386A (en) | Tape guide roller with flange and tapered surface for use in video tape recorder | |
| EP1376577A3 (en) | Magnetic tape cartridge | |
| US4122985A (en) | Tape cartridge with self-aligning tape transport roller | |
| JPH0464953A (en) | Guide roller | |
| KR900013467A (en) | Head drum | |
| JPH0464956A (en) | Guide roller | |
| KR930702757A (en) | Tape cassette | |
| KR970067198A (en) | Pinch roller assembly of tape recorder | |
| JPH0464955A (en) | Guide roller and its production | |
| JPH0464957A (en) | Guide roller | |
| US4025027A (en) | Tape propelling means in cassette-type tape-recorders | |
| US4741496A (en) | Tape cartridge | |
| US4270685A (en) | Capstan bearing device | |
| KR930003332Y1 (en) | Guide pin for video tape | |
| US3913856A (en) | Endless tape transporting device | |
| JPS624927Y2 (en) | ||
| JPS6219640Y2 (en) | ||
| US6149044A (en) | Supporting mechanism for pinch roller unit for use in magnetic recording/reproducing apparatus | |
| JP2811592B2 (en) | Tape cartridge | |
| JPH0636551Y2 (en) | Magnetic tape cassette | |
| JP2005067885A (en) | Self-aligning roller | |
| JPH11196721A (en) | Line-guiding mechanism for spinning reel | |
| KR0174969B1 (en) | Pinch Roller Assembly of Tape Recorder | |
| KR920013401A (en) | Tape cassette | |
| KR100215414B1 (en) | Pinch Roller Assembly of Tape Recorder |