JPS622370B2 - - Google Patents
Info
- Publication number
- JPS622370B2 JPS622370B2 JP11178881A JP11178881A JPS622370B2 JP S622370 B2 JPS622370 B2 JP S622370B2 JP 11178881 A JP11178881 A JP 11178881A JP 11178881 A JP11178881 A JP 11178881A JP S622370 B2 JPS622370 B2 JP S622370B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic tape
- boss
- elastic body
- shaft
- pinch roller
- 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
Links
- 238000010586 diagram Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
- G11B15/18—Driving; Starting; Stopping; Arrangements for control or regulation thereof
- G11B15/26—Driving record carriers by members acting directly or indirectly thereon
- G11B15/28—Driving record carriers by members acting directly or indirectly thereon through rollers driving by frictional contact with the record carrier, e.g. capstan; Multiple arrangements of capstans or drums coupled to means for controlling the speed of the drive; Multiple capstan systems alternately engageable with record carrier to provide reversal
- G11B15/29—Driving record carriers by members acting directly or indirectly thereon through rollers driving by frictional contact with the record carrier, e.g. capstan; Multiple arrangements of capstans or drums coupled to means for controlling the speed of the drive; Multiple capstan systems alternately engageable with record carrier to provide reversal through pinch-rollers or tape rolls
Description
【発明の詳細な説明】
本発明は磁気テープをキヤプスタンで駆動する
機能と磁気テープを巻回したリールで駆動する機
能を兼ね備え、且つ前記磁気テープをリールで駆
動するとき磁気テープがキヤプスタン軸から離れ
た状態のピンチローラに巻回された状態になるテ
ープ走行系を有する磁気記録再生装置において、
磁気テープの走行がスムーズに行なわれるように
することを目的とした磁気記録再生装置のピンチ
ローラに関するものである。Detailed Description of the Invention The present invention has both the function of driving a magnetic tape with a capstan and the function of driving it with a reel wound with the magnetic tape, and furthermore, when the magnetic tape is driven with the reel, the magnetic tape is separated from the capstan axis. In a magnetic recording/reproducing device having a tape running system that is wound around a pinch roller that is
The present invention relates to a pinch roller for a magnetic recording/reproducing device whose purpose is to ensure smooth running of a magnetic tape.
従来の磁気記録再生装置を示す第１図及び第２
図において、１は磁気テープ２を一端側より巻回
したリールで、図外の駆動モータに連結され、又
磁気テープ２の他端側も同様に図外の駆動モータ
に連結された他のリールに巻回されている。３，
４は前記リール１を収納したカセツト１６内に設
けられたガイドポスト、５は引き出しポストで、
この引き出しポスト５は前記カセツト１６の下に
位置する軸６を中心に回動するレバー７の一端に
固定されている。８はピンチローラで、軸９を中
心に回動するレバー１０の一端に軸１１に回転自
在に枢支されている。１２はキヤプスタン軸、１
３は前記磁気テープ２の上下の位置を規制するフ
ランジを上下両端に有する規制ポストである。１
４はオーデイオ・コントロールヘツド、１５はオ
ーデイオ・イレースヘツドである。前記磁気テー
プ２を前記キヤプスタン軸１２で駆動する場合、
前記ピンチローラ８をキヤプスタン軸１２に磁気
テープ２を挾み込んだ状態で圧接し、又磁気テー
プ２を前記リール１又は他方のリールで駆動する
場合ピンチローラ８をキヤプスタン軸１２から離
した状態で行なう。ところで前記ピンチローラ８
は第２図に示すように、ボス１７内面の軸方向中
央に設けられた玉軸受１８で前記軸１１に枢支さ
れている。１９は前記ボス１７に外嵌されて取り
付けられた円筒状弾性体、２０は前記玉軸受１８
を前記ボス１７に固定するためにボス１７内に下
方より内嵌して玉軸受１８をボス１７内面の段部
１７ａとの間で挾持するカラー、２１は前記軸１
１に上方より外嵌圧着された前記玉軸受１８の上
面に接して前記軸１１からのボス１７の抜け止め
を行なうキヤツプである。従つて前記リール１も
しくは他方のリールで前記磁気テープ２を駆動し
た場合、上述したようにピンチローラ８は玉軸受
１８１個で前記軸１１に回転自在に枢支されてい
るため、該ピンチローラ８は軸１１に対して傾斜
して回転する。故に第２図に示すように磁気テー
プ２も傾斜して走行するため、上又は下に移動
し、そのため前記規制ポスト１３の上フランジ又
は下フランジに乗り上げて磁気テープ２のエツヂ
に損傷をきたしていた。 Figures 1 and 2 show a conventional magnetic recording and reproducing device.
In the figure, reference numeral 1 denotes a reel on which a magnetic tape 2 is wound from one end, which is connected to a drive motor (not shown), and the other end of the magnetic tape 2 is connected to another reel which is similarly connected to a drive motor (not shown). is wrapped around. 3,
4 is a guide post provided in the cassette 16 that houses the reel 1; 5 is a drawer post;
The drawer post 5 is fixed to one end of a lever 7 which rotates about a shaft 6 located below the cassette 16. A pinch roller 8 is rotatably supported on a shaft 11 at one end of a lever 10 which rotates around a shaft 9. 12 is the capstan shaft, 1
Reference numeral 3 denotes a regulating post having flanges at both upper and lower ends for regulating the upper and lower positions of the magnetic tape 2. 1
4 is an audio control head, and 15 is an audio erase head. When the magnetic tape 2 is driven by the capstan shaft 12,
The pinch roller 8 is pressed against the capstan shaft 12 with the magnetic tape 2 sandwiched therein, and when the magnetic tape 2 is driven by the reel 1 or the other reel, the pinch roller 8 is separated from the capstan shaft 12. Let's do it. By the way, the pinch roller 8
As shown in FIG. 2, the shaft 11 is pivotally supported by a ball bearing 18 provided at the center of the inner surface of the boss 17 in the axial direction. 19 is a cylindrical elastic body fitted and attached to the boss 17; 20 is the ball bearing 18;
A collar 21 fits inside the boss 17 from below in order to fix the ball bearing 18 to the boss 17 and clamps the ball bearing 18 between it and the stepped portion 17a on the inner surface of the boss 17;
This cap is in contact with the upper surface of the ball bearing 18 which is externally fitted and crimped onto the shaft 11 from above to prevent the boss 17 from coming off from the shaft 11. Therefore, when the magnetic tape 2 is driven by the reel 1 or the other reel, the pinch roller 8 is rotatably supported on the shaft 11 with 181 ball bearings as described above. rotates at an angle to the axis 11. Therefore, as shown in FIG. 2, since the magnetic tape 2 also runs at an angle, it moves upward or downward, and therefore rides on the upper or lower flange of the regulation post 13, causing damage to the edges of the magnetic tape 2. Ta.
又、従来の別例として第３図に示すように、ボ
ス１７の内面上下両端に玉軸受２２，２３を設
け、該玉軸受２２，２３を介して前記軸１１に回
転自在に枢支されたピンチローラがあるが、この
場合前記キヤプスタン軸１２と前記円筒状弾性体
１９の回転軸芯の平行度に高い精度が要求され、
充分な平行度の精度が得られない場合、前記ピン
チローラ８をキヤプスタン軸１２に圧接して磁気
テープ２を駆動すると円筒状弾性体１９が磁気テ
ープ２をキヤプスタン軸１２に圧接する圧力分布
に均衡を吹き、故に磁気テープ２に上下動の変動
をきたし、前記規制ポスト１３の上下フランジへ
の乗り上げ、前記オーデイオ・コントロールヘツ
ド１４での上下動におけるコントロール信号出力
不足等による磁気テープ２の走行不安定等を来た
し、問題が多かつた。 As another example of the conventional method, as shown in FIG. 3, ball bearings 22 and 23 are provided at both upper and lower ends of the inner surface of the boss 17, and the boss 17 is rotatably supported on the shaft 11 via the ball bearings 22 and 23. There is a pinch roller, but in this case, high accuracy is required in the parallelism of the rotation axes of the capstan shaft 12 and the cylindrical elastic body 19,
If sufficient parallelism accuracy cannot be obtained, when the pinch roller 8 is pressed against the capstan shaft 12 and the magnetic tape 2 is driven, the cylindrical elastic body 19 balances the pressure distribution pressing the magnetic tape 2 against the capstan shaft 12. This causes fluctuations in the vertical movement of the magnetic tape 2, causing the regulation post 13 to run on the upper and lower flanges, and the audio control head 14 running unstable due to insufficient control signal output during vertical movement. etc., and there were many problems.
本発明は斯かる問題に対処すべく為されたもの
で、キヤプスタン軸による駆動及びリールによる
駆動でも磁気テープに安定した走行を得られるよ
うにしたものであり、以下本発明を実施の一例を
示す図面（第４図）と前記第１図に基づき説明す
る。第４図においてボス１７内面の軸方向中央に
玉軸受２４を有し、又該ボス１７の下端内面に、
ボス１７に外嵌して設けられた円筒状弾性体１９
よりもやわらかい弾性体２７を介して玉軸受２５
を有し、これら両玉軸受２４，２５とでピンチロ
ーラ８は軸１１に回転自在に枢支されている。尚
前記玉軸受２４はボス１７内面の段部１７ａに接
当する。２６はカラーで、前記玉軸受２４，２５
間に介在され、玉軸受２４，２５の軸方向の位置
を規制している。又前記軸１１に上方より外嵌圧
着されるキヤツプ２１で軸１１からのボス１７の
抜け止めを行なつている。尚前記玉軸受２４，２
５の軸芯と円筒状弾性体１９の外周面の軸芯とは
同芯状になるように構成されている。 The present invention has been made to deal with such problems, and enables stable running of the magnetic tape even when driven by a capstan shaft or by a reel.An example of the implementation of the present invention will be described below. This will be explained based on the drawing (FIG. 4) and FIG. 1. In FIG. 4, a ball bearing 24 is provided at the axial center of the inner surface of the boss 17, and a ball bearing 24 is provided at the inner surface of the lower end of the boss 17.
A cylindrical elastic body 19 fitted externally to the boss 17
ball bearing 25 via an elastic body 27 that is softer than
The pinch roller 8 is rotatably supported on the shaft 11 by these ball bearings 24 and 25. The ball bearing 24 is in contact with a stepped portion 17a on the inner surface of the boss 17. 26 is a collar, and the ball bearings 24, 25
It is interposed between the ball bearings 24 and 25 to regulate the axial positions of the ball bearings 24 and 25. The boss 17 is prevented from coming off from the shaft 11 by a cap 21 which is externally fitted and crimped onto the shaft 11 from above. Note that the ball bearings 24, 2
5 and the axis of the outer peripheral surface of the cylindrical elastic body 19 are configured to be concentric.
従つて第４図Ａに示すように、ピンチローラ８
をキヤプスタン軸１２から離した状態で前記リー
ル１又は他方のリールで前記磁気テープ２を駆動
した場合、前記弾性体２７を介して玉軸受２５が
設けられているため、磁気テープ２をピンチロー
ラ８即ち前記円筒状弾性体１９に巻回しても、磁
気テープ２の張力が該円筒状弾性体１９上で最大
100〜200gに対し、キヤプスタン軸１２に圧接す
る圧力が１〜２Kgと大きいため、前記弾性体２７
がほぼ変形することなく、そのため円筒状弾性体
１９は前記軸１１に対して傾斜することもなく、
安定した磁気テープ２の走行を得ることができ
る。又前記ピンチローラ８をキヤプスタン軸１２
に磁気テープ２を挾み込んで圧接し、該キヤプス
タン軸１２で磁気テープ２を駆動する場合、前記
弾性体２７の硬度を前記円筒状弾性体１９よりも
低い硬度にしているため、該弾性体２７の変形に
より前記円筒状弾性体１９はキヤプスタン軸１２
に均一に摺動回転し、磁気テープ２は安定した走
行を得ることができる。 Therefore, as shown in FIG. 4A, the pinch roller 8
When the magnetic tape 2 is driven by the reel 1 or the other reel while the magnetic tape 2 is separated from the capstan shaft 12, since the ball bearing 25 is provided via the elastic body 27, the magnetic tape 2 is moved to the pinch roller 8. That is, even when the magnetic tape 2 is wound around the cylindrical elastic body 19, the tension of the magnetic tape 2 is at its maximum on the cylindrical elastic body 19.
Since the pressure applied to the capstan shaft 12 is as large as 1 to 2 kg compared to 100 to 200 g, the elastic body 27
is hardly deformed, and therefore the cylindrical elastic body 19 is not inclined with respect to the axis 11,
Stable running of the magnetic tape 2 can be obtained. In addition, the pinch roller 8 is connected to the capstan shaft 12.
When the magnetic tape 2 is inserted into and pressed against the capstan shaft 12 and the magnetic tape 2 is driven by the capstan shaft 12, the hardness of the elastic body 27 is lower than that of the cylindrical elastic body 19. Due to the deformation of the cylindrical elastic body 19, the capstan shaft 12
The magnetic tape 2 slides and rotates uniformly, and the magnetic tape 2 can run stably.
このように本発明によれば、前記玉軸受を受け
る弾性体の硬度をボスに外嵌する円筒状弾性体の
硬度より低くすることにより、磁気テープをピン
チローラに巻回した状態でリールで駆動する場合
も、又磁気テープを挾み込んだ状態でピンチロー
ラをキヤプスタン軸に圧接して駆動する場合も、
磁気テープを安定に走行させることができ、磁気
テープが損傷することもなく、従来の問題を一挙
に解決でき、優れた効果が得られる。 As described above, according to the present invention, by making the hardness of the elastic body that receives the ball bearing lower than the hardness of the cylindrical elastic body that fits around the boss, the magnetic tape can be driven by a reel while being wound around the pinch roller. Also, when driving the pinch roller by pressing it against the capstan shaft with the magnetic tape sandwiched between them,
The magnetic tape can be run stably, the magnetic tape will not be damaged, the conventional problems can be solved all at once, and excellent effects can be obtained.
第１図は磁気テープ走行系を示す概略図、第２
図及び第３図は従来のピンチローラの異なつた例
を示す断面図、第４図は本発明の実施の一例を示
すピンチローラの断面図で、Ａはキヤプスタン軸
から離れた場合、Ｂはキヤプスタン軸に圧接した
場合を示す。
１７……ボス、１９……円筒状弾性体、２１…
…キヤツプ、２４，２５……玉軸受、２６……カ
ラー、２７……弾性体。
Figure 1 is a schematic diagram showing the magnetic tape running system, Figure 2 is a schematic diagram showing the magnetic tape running system.
3 and 3 are cross-sectional views showing different examples of conventional pinch rollers, and FIG. 4 is a cross-sectional view of a pinch roller showing an example of the embodiment of the present invention. This shows the case where it is pressed against the shaft. 17... Boss, 19... Cylindrical elastic body, 21...
... Cap, 24, 25 ... Ball bearing, 26 ... Collar, 27 ... Elastic body.
Claims (1)
性体と、前記ボスの内面で軸方向中央に設けられ
た玉軸受と、前記ボス内面の一端に前記円筒状弾
性体よりもやわらかい弾性体を介して設けられた
玉軸受とから成り、前記２つの玉軸受を以つて軸
に枢支させてなることを特徴とする磁気記録再生
装置のピンチローラ。1. A boss, a cylindrical elastic body provided on the outer periphery of the boss, a ball bearing provided at the axial center on the inner surface of the boss, and an elastic body softer than the cylindrical elastic body at one end of the inner surface of the boss. 1. A pinch roller for a magnetic recording/reproducing device, characterized in that the pinch roller comprises a ball bearing provided through the ball bearing, and is pivotally supported on a shaft using the two ball bearings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11178881A JPS5814349A (en) | 1981-07-16 | 1981-07-16 | Pinch roller for magnetic recording and reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11178881A JPS5814349A (en) | 1981-07-16 | 1981-07-16 | Pinch roller for magnetic recording and reproducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5814349A JPS5814349A (en) | 1983-01-27 |
| JPS622370B2 true JPS622370B2 (en) | 1987-01-19 |
Family
ID=14570165
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11178881A Granted JPS5814349A (en) | 1981-07-16 | 1981-07-16 | Pinch roller for magnetic recording and reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5814349A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS649482U (en) * | 1987-07-03 | 1989-01-19 |
-
1981
- 1981-07-16 JP JP11178881A patent/JPS5814349A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS649482U (en) * | 1987-07-03 | 1989-01-19 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5814349A (en) | 1983-01-27 |
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