JPS63195851A - Loop quantity detector - Google Patents

Loop quantity detector

Info

Publication number
JPS63195851A
JPS63195851A JP62026403A JP2640387A JPS63195851A JP S63195851 A JPS63195851 A JP S63195851A JP 62026403 A JP62026403 A JP 62026403A JP 2640387 A JP2640387 A JP 2640387A JP S63195851 A JPS63195851 A JP S63195851A
Authority
JP
Japan
Prior art keywords
loop
tip
amount
detection means
vacuum column
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
Application number
JP62026403A
Other languages
Japanese (ja)
Inventor
Akio Kuwabara
桑原 昭夫
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP62026403A priority Critical patent/JPS63195851A/en
Publication of JPS63195851A publication Critical patent/JPS63195851A/en
Pending legal-status Critical Current

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  • Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)

Abstract

PURPOSE:To simplify the constitution of a device and maintenance work by arranging a loop detecting means corresponding to the lower part of the tip of a loop and detecting a loop quantity on the basis of a distance between the tip of the loop and the detecting means. CONSTITUTION:An ultrasonic type or the like loop detecting means 13 for detecting the quantity of a loop 1A formed in a vacuum column 7 is fitted to the lower part of the column 7 correspondingly to the loop 1A. The means 13 detects the distance between the means 13 and the tip of the loop 1A as a loop quantity signal detected by the means 13 is inputted to a motor 11 through a controller 9 and an amplifier 10 as a control signal for a servo system, so that the loop 1A in the vacuum column 7 is held within a fixed range. Since one loop detecting means 13 is required for arranging it in each vacuum column 7, the constitution of the device can be simplified and maintenance work can be also simplified.

Description

【発明の詳細な説明】 [発明の目的] (産業上の利用分野) 本発明は、磁気記録再生装置における磁気テープのルー
プ量を検出するループ検出装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a loop detection device for detecting the loop amount of a magnetic tape in a magnetic recording/reproducing device.

(従来の技術) 電子計算機などに使用されて磁気テープにデータを書ぎ
込みまたは読み取るようにした磁気記録再生装置では、
磁気テープの走行を例えば第2図に示ずような手段を用
いて行なっている。
(Prior art) Magnetic recording and reproducing devices used in electronic computers and the like to write and read data on magnetic tapes are
The magnetic tape is run using, for example, a means as shown in FIG.

この第2図の構成について説明すると、磁気テープ1の
両端は供給リール2と巻取り−ル3とに巻回されており
、供給リール2から送り出され磁気テープ1はガイドロ
ーラ4に案内されて巻取リール3へ給送され、この巻取
リール3で巻取られる。そして給送途中ではキャプスタ
ン5などの駆動ローラで低速送りされてデータの書き込
みおよび読み出しが磁気ヘッド6より行なわれる。
To explain the configuration shown in FIG. 2, both ends of the magnetic tape 1 are wound around a supply reel 2 and a take-up reel 3, and the magnetic tape 1 is fed out from the supply reel 2 and guided by a guide roller 4. It is fed to the take-up reel 3 and wound on this take-up reel 3. During feeding, the disk is fed at low speed by a drive roller such as a capstan 5, and data is written and read by a magnetic head 6.

また給送経路内には供給リール2と磁気ヘッド6および
巻取リール3と磁気ヘッド6間に真空コラム7でなるテ
ープ緩衝機構がそれぞれ設けられ、この真空声ラム7内
にループ1Aを形成するようにしている。この各真空コ
ラム7の側面には磁気う−−ブ1のループ1Aに沿って
ループ量検出手段8が各々設けられている。検出手段8
は光学的または圧力横方式などが用いられ、この検出手
段8で検出したループ量の信号は制御器9.モータ駆動
増幅器10を介してリール駆動モータ11に入力される
Further, a tape buffer mechanism consisting of a vacuum column 7 is provided between the supply reel 2 and the magnetic head 6 and between the take-up reel 3 and the magnetic head 6 in the feeding path, and a loop 1A is formed within the vacuum column 7. That's what I do. A loop amount detection means 8 is provided on the side surface of each vacuum column 7 along the loop 1A of the magnetic wave 1. Detection means 8
An optical or horizontal pressure method is used, and the loop amount signal detected by this detection means 8 is sent to a controller 9. The signal is input to a reel drive motor 11 via a motor drive amplifier 10.

このモータ11では増幅器10を介して入力されて来る
キャプスタン5の回転数やテープ走行方向などの情報信
号12に基づいて制御がなされリニア方式あるいはオン
・オフ方式などで駆動されて供給リール2のテープ供給
動作を制御するようになっている。
The motor 11 is controlled based on information signals 12 such as the rotational speed of the capstan 5 and the tape running direction inputted through the amplifier 10, and is driven in a linear system or an on-off system to drive the supply reel 2. The tape supply operation is controlled.

すなわちモータ11は、真空コラム7内のループ1Aの
鯖が少ない状態では供給リール2が磁気テープ1を供給
する方向に駆動し、逆にループ1Aの組が犬い状態では
供給リール2が磁気テープ1を巻き取る方向に駆動する
。そして、このサーボ系によって真空コラム7内のルー
プ1Aの量が一定範囲内に保たれるようになっている。
That is, the motor 11 drives the supply reel 2 in the direction to supply the magnetic tape 1 when the number of loops 1A in the vacuum column 7 is small, and on the other hand, when the number of loops 1A is small, the supply reel 2 drives the magnetic tape 1. 1 in the winding direction. This servo system maintains the amount of loop 1A within vacuum column 7 within a certain range.

ま1=巻取リール側においても同様に制御される。(1) The same control is performed on the take-up reel side.

ところで、この構造においてはループ量検出手段8が真
空コラム7の側面に磁気テープ1のループ1Aに沿って
設けられているが、この構成ではループ1Aの動作範囲
全体あるいは複数個所に検出素子などを設置する必要が
ある。このため全体の構成が複雑になってコスト高にな
り、また保守作業も面倒になる問題がある。
Incidentally, in this structure, the loop amount detection means 8 is provided on the side surface of the vacuum column 7 along the loop 1A of the magnetic tape 1, but in this structure, a detection element etc. is provided over the entire operating range of the loop 1A or at multiple locations. It is necessary to install it. For this reason, there are problems in that the overall configuration becomes complicated, the cost increases, and maintenance work becomes troublesome.

(発明が解決しようとする問題点) 下達したように従来の磁気記録再生装置におけるループ
量検出装置ではループ1Aの動作範囲全体あるいは複数
個所に検出素子などを設置する必要があり、このため全
体の構成が複雑でコスト高になる問題および保守作業が
面倒になる問題などがあった。
(Problems to be Solved by the Invention) As mentioned above, in the conventional loop amount detection device in a magnetic recording/reproducing device, it is necessary to install a detection element or the like over the entire operating range of the loop 1A or at multiple locations. There were problems such as complicated configuration, high cost, and troublesome maintenance work.

本発明は、上記問題点に鑑みなされたものであり、その
目的は構造が簡略化されてコスト低減が図れ、かつ保守
作業も簡単にすることのできる磁気記録再生装置におけ
るループ量検出装置を提供することにある。
The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a loop amount detection device for a magnetic recording/reproducing device that has a simplified structure, can reduce costs, and can simplify maintenance work. It's about doing.

[発明の構成] (問題点を解決するための手段) 上記目的を達成するため、本発明のループ量検出装置は
ループ検出手段をループ先端の下方に対応して設け、前
記ループ先端との距離でループ量を検出するように構成
したものである。
[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the loop amount detection device of the present invention is provided with a loop detection means corresponding to the lower part of the loop tip, and the loop detection means is provided below the loop tip. The system is configured to detect the loop amount.

(作用) 本発明によれば、ループ先端との距離でループ量を検出
するものであるから、ループ先端に対応した下方に一つ
だけ検出手段を設【プれば良い。
(Function) According to the present invention, since the loop amount is detected based on the distance from the loop tip, it is sufficient to provide only one detection means below the loop tip.

したがって磁気記録再生装置における構造の簡略化が図
れ、また保守作業も簡単になる。
Therefore, the structure of the magnetic recording/reproducing device can be simplified, and maintenance work can also be simplified.

(実施例) 以下、本発明の実施例を図面に基づいて詳細に説明する
(Example) Hereinafter, an example of the present invention will be described in detail based on the drawings.

第1図は本発明の一実施例に係るループ量検出装置を適
用した磁気記録再生装置の概略構成図である。第1図に
おいて第2図と同一符号を付したものは第2図と同一の
ものを示している。そして、この磁気記録再生装置では
各真空コラム7内に形成されるループ1Aのループ量を
検出するループ検出手段13がループ1Aと対応した状
態で下方に設けられている。このループ検出手段13は
ループ1Aの先端に光を当てて反射光を検出する光学式
や超音波を当てて反射波を検出する超音波式などが用い
られ、ループ検出手段13とループ1Aの先端との距離
を検出しループ量としでいる。
FIG. 1 is a schematic diagram of a magnetic recording/reproducing apparatus to which a loop amount detection device according to an embodiment of the present invention is applied. In FIG. 1, the same reference numerals as in FIG. 2 indicate the same components as in FIG. In this magnetic recording and reproducing apparatus, loop detection means 13 for detecting the amount of loop 1A formed in each vacuum column 7 is provided below in a state corresponding to loop 1A. The loop detection means 13 is an optical type that applies light to the tip of the loop 1A and detects the reflected light, or an ultrasonic type that applies ultrasonic waves to detect the reflected wave. The distance between the two is detected and used as the loop amount.

そしてループ検出手段13で検出されたループ量信号は
制御器9.増幅器10を介しモータ11に入力されるサ
ーボ系の制御信号として使用され、真空コラム7内のル
ープ1Aが一定範囲内に保たれるJ、うになる。
The loop amount signal detected by the loop detection means 13 is sent to the controller 9. It is used as a control signal for the servo system that is input to the motor 11 via the amplifier 10, and keeps the loop 1A in the vacuum column 7 within a certain range.

したがって、この構造ではループ検出手段13がループ
1Aの下方において、ループ1Aと対応した状態で設け
られている。そしてループ1Aの先端との距離でループ
1を検出するようにしているので各真空ロラム7内に一
つのループ検出手段13を配置すれば良く、磁気記録再
生装置全体の構成を面単にすることができると同時に保
守作業も簡単になる。
Therefore, in this structure, the loop detection means 13 is provided below the loop 1A in a state corresponding to the loop 1A. Since the loop 1 is detected based on the distance from the tip of the loop 1A, it is only necessary to arrange one loop detection means 13 in each vacuum roll 7, and the structure of the entire magnetic recording/reproducing apparatus can be simplified. This also simplifies maintenance work.

[発明の効果] 以上のように本発明が適用されたループ量検出装置では
、磁気記録再生装置内のループ検出構造を簡単にするこ
とができるのでシステム全体のコスト低減が図れ、また
保守作業が簡単になる。
[Effects of the Invention] As described above, in the loop amount detection device to which the present invention is applied, the loop detection structure in the magnetic recording and reproducing device can be simplified, so the cost of the entire system can be reduced, and maintenance work can be reduced. It gets easier.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の一実施例に係るループ量検出装置を適
用した磁気記録再生装置の概略構成図、第2図は従来の
ループ量検出装置を用いた磁気記録再生装置の概略構成
図である。 1・・・供給リール、1A・・・ループ、2・・・巻取
り一ル、5・・・キャプスタン、13・・・ループ検出
手段。
FIG. 1 is a schematic configuration diagram of a magnetic recording/reproducing apparatus using a loop amount detection device according to an embodiment of the present invention, and FIG. 2 is a schematic configuration diagram of a magnetic recording/reproduction device using a conventional loop amount detection device. be. DESCRIPTION OF SYMBOLS 1... Supply reel, 1A... Loop, 2... Winding reel, 5... Capstan, 13... Loop detection means.

Claims (1)

【特許請求の範囲】[Claims] 一対のリールに両端を各々巻回させた磁気テープを駆動
ローラを介して走行させるとともに、前記駆動ローラと
前記リール間に形成されるテープ量をループ検出手段で
検出して前記テープループ量を制御するようにした磁気
記録再生装置におけるループ量検出装置であって、前記
ループ検出手段を前記ループ先端の下方に対応して設け
、前記ループ先端との距離でループ量を検出することを
特徴としたループ量検出装置。
A magnetic tape with both ends wound around a pair of reels is run through a drive roller, and a loop detection means detects the amount of tape formed between the drive roller and the reel to control the amount of tape loop. A loop amount detection device for a magnetic recording/reproducing device, characterized in that the loop detection means is provided below the loop tip, and the loop amount is detected based on the distance from the loop tip. Loop amount detection device.
JP62026403A 1987-02-09 1987-02-09 Loop quantity detector Pending JPS63195851A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62026403A JPS63195851A (en) 1987-02-09 1987-02-09 Loop quantity detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62026403A JPS63195851A (en) 1987-02-09 1987-02-09 Loop quantity detector

Publications (1)

Publication Number Publication Date
JPS63195851A true JPS63195851A (en) 1988-08-12

Family

ID=12192587

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62026403A Pending JPS63195851A (en) 1987-02-09 1987-02-09 Loop quantity detector

Country Status (1)

Country Link
JP (1) JPS63195851A (en)

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