JPH05151743A - Tape reel and magnetic tape cartridge mounted with this tape reel - Google Patents

Abstract

PURPOSE:To prevent the disturbance in winding of a tape by providing recessed grooves for outflow of air radially from a tape winding core toward the outer periphery of a flange and having through-holes for inflow of the air communicating in the recessed grooves. CONSTITUTION:The tape reel 1 is constituted by fixing the upper flange 4 to the top end face of the tape winding core 3 integrally formed with the lower flange 2. The recessed grooves 5 for outflow of the air extending radially from the winding core 3 to the part near the outer periphery of the flange 4 are provided at equal spacings on the inside surface of the flange 4. Through-holes 6 for inflow of the air communicating with the inside end on the winding core 3 side of the recessed grooves 5 are bored in the flange 4. As a result, the air introduced from the through-holes 6 into the inner side of the flange 4 when the tape 8 is taken up at a high speed. The flow of the air is then generated in the outer peripheral direction of the flange 4 from the winding core 3 through the recessed grooves 5. Then, the disturbance in the winding of the tape 8 is prevented even if the air is intruded between the tapes 8.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】この発明はテ−プを巻回するテ−
プリ−ル並びにこのテ−プリ−ルを装着した磁気テ−プ
カ−トリッジに関し、さらに詳しくは、テ−プの巻き乱
れがなくて巻き姿が良好なテ−プリ−ルと、このテ−プ
リ−ルに磁気テ−プを巻回させて本体内に装着した磁気
テ−プの巻き姿が良好で巻き乱れのない信頼性に優れた
磁気テ−プカ−トリッジに関する。BACKGROUND OF THE INVENTION The present invention relates to a tape winding tape.
A tape and a magnetic tape cartridge equipped with this tape are described in more detail. More specifically, a tape having a good winding appearance without disorder of winding of the tape, and this tape. The present invention relates to a magnetic tape cartridge having a magnetic tape wound around a main body and mounted in the main body so that the magnetic tape has a good winding appearance and is free from winding disorder and is excellent in reliability.

【０００２】[0002]

【従来の技術】ＶＴＲ（ビデオテ−プレコ−ダ）やＤＡ
Ｔ（デジタルオ−ディオテ−レコ−ダ）などの磁気記録
再生装置において、磁気テ−プを巻き取るときの巻き乱
れは、磁気テ−プのエッジ変形を引き起こし、磁気テ−
プに記録されたデ−タの信頼性を著しく低下させる原因
となる。このため、磁気テ−プ巻き取り時の巻き乱れを
防止する方法として、図５に示すように磁気テ−プカ−
トリッジ１０ａ内に磁気テ−プ規制ガイド機構１３を設
けたり（特開昭５１−９３８号）、また図６に示すよう
に磁気テ−プカ−トリッジ１０ｂ内に磁気テ−プ８ｂを
巻芯方向に加圧する帯状の案内機構１４を設けたり（特
開昭５１−２２４２０号）して、磁気テ−プ８ａおよび
８ｂの巻き取り時の走行を規制することが行われてい
る。2. Description of the Related Art VTR (video tape recorder) and DA
In a magnetic recording / reproducing apparatus such as a T (digital audio recorder / recorder), winding disorder when winding a magnetic tape causes edge deformation of the magnetic tape, and the magnetic tape is deformed.
This causes the reliability of the data recorded in the tape to be significantly reduced. For this reason, as a method for preventing winding disorder during winding of a magnetic tape, as shown in FIG.
A magnetic tape regulating guide mechanism 13 may be provided in the trench 10a (Japanese Patent Laid-Open No. 51-938), or as shown in FIG. 6, a magnetic tape 8b may be provided in the magnetic tape cartridge 10b in the core direction. A belt-shaped guide mechanism 14 for applying pressure is provided (Japanese Patent Laid-Open No. 51-22420) to restrict the traveling of the magnetic tapes 8a and 8b at the time of winding.

【０００３】[0003]

【発明が解決しようとする課題】ところが、これら従来
の方法では、磁気テ−プ規制ガイド機構１３や磁気テ−
プ案内機構１４を、磁気テ−プ８ａまたは８ｂの裏面あ
るいは両エッジ部に接触させて走行規制を行っているた
め、磁気テ−プ８ａ，８ｂの送り速度が高速になると、
規制ガイド機構１３や案内機構１４と接触する部分で磁
気テ−プ８ａ，８ｂに損傷を与えるという問題があり、
特に業務用デジタルＶＴＲ Ｄ２のように、磁気テ−プ
の巻き取り速度が最大１３ｍ／sec （１００倍速シャト
ルモ−ド）にも達する場合は、これら従来の磁気テ−プ
の走行を規制する方法を用いることができない。However, in these conventional methods, the magnetic tape regulation guide mechanism 13 and the magnetic tape are used.
Since the guide mechanism 14 is in contact with the back surface of the magnetic tape 8a or 8b or both edge portions to regulate the traveling, when the feeding speed of the magnetic tapes 8a and 8b becomes high,
There is a problem that the magnetic tapes 8a and 8b are damaged at the portions that come into contact with the regulation guide mechanism 13 and the guide mechanism 14.
Especially when the winding speed of the magnetic tape reaches a maximum of 13 m / sec (100x speed shuttle mode) like the commercial digital VTR D2, a method of restricting the running of these conventional magnetic tapes is used. It cannot be used.

【０００４】[0004]

【課題を解決するための手段】この発明はかかる問題を
解消するため種々検討を行った結果なされたもので、テ
−プリ−ルの上下いずれか一方のフランジの内面にテ−
プ巻芯からフランジ外周にかけて放射状に伸びる空気流
出用凹溝を設け、この空気流出用凹溝に連通する空気流
入用貫通孔をフランジに穿設することによって、このテ
−プリ−ルに高速で巻回されるテ−プの巻き乱れを防止
し、テ−プの巻き姿を良好にしたものである。また、こ
のように上下いずれか一方のフランジに空気流出用凹溝
と空気流入用貫通孔とを設けた一対のテ−プリ−ルを、
磁気テ−プカ−トリッジの本体内に装着し、各テ−プリ
−ル間に磁気テ−プを巻回させることによって、磁気テ
−プカ−トリッジにおける磁気テ−プの巻き乱れを防止
し、磁気テ−プの巻き姿を良好にして、磁気記録された
デ−タの信頼性が低下したりしないようにしたものであ
る。The present invention has been made as a result of various studies in order to solve the above problems, and a tape is formed on the inner surface of one of the upper and lower flanges of the tape reel.
A groove for air outflow extending radially from the winding core to the outer periphery of the flange is provided, and a through hole for air inflow communicating with the groove for air outflow is formed in the flange, so that this tape reel can be operated at high speed. The tape is wound in a good shape by preventing winding disorder. Further, in this way, a pair of tape reels provided with an air outflow groove and an air inflow through hole in either the upper or lower flange,
It is mounted in the body of the magnetic tape cartridge, and by winding the magnetic tape between the tape reels, the winding disorder of the magnetic tape in the magnetic tape cartridge is prevented, The winding shape of the magnetic tape is improved so that the reliability of the magnetically recorded data does not deteriorate.

【０００５】この発明によれば、テ−プリ−ルの上下い
ずれか一方のフランジの内面にテ−プ巻芯からフランジ
外周にかけて放射状に伸びる空気流出用凹溝を設け、こ
の空気流出用凹溝に連通する空気流入用貫通孔をフラン
ジに穿設しているため、テ−プが高速で巻き取られると
き、その遠心力により空気流入用貫通孔から空気がフラ
ンジ内に入り込み、空気流出用凹溝を通ってテ−プ巻芯
からフランジ外周方向に空気の流れが生じる。しかし
て、テ−プ巻芯からフランジ外周方向に流れる空気の流
れによりテ−プ幅方向に規制力が加わり、たとえテ−プ
間に空気が巻き込まれて空気膜が形成されても、テ−プ
の巻き乱れが効果的に防止されて、良好な巻き姿で巻回
される。また、テ−プ幅方向への規制を、空気の流れに
よって非接触で行っているため、高速での巻き取り時に
テ−プエッジを損傷させることもない。その結果、磁気
テ−プカ−トリッジにおいても、磁気テ−プの高速巻き
取り時に発生する磁気テ−プの巻き乱れが防止され、磁
気テ−プの巻き姿が良好で信頼性に優れた磁気テ−プカ
−トリッジが得られる。According to the present invention, an air outflow groove extending radially from the tape winding core to the outer periphery of the flange is provided on the inner surface of one of the upper and lower flanges of the tape reel, and the air outflow groove is formed. Since the air inflow through hole that communicates with the flange is drilled in the flange, when the tape is wound at high speed, the centrifugal force causes air to enter the flange through the air inflow through hole, and the air outflow recess Air flows from the tape winding core through the groove toward the outer circumference of the flange. Therefore, even if a restriction force is applied in the tape width direction by the flow of air flowing from the tape winding core toward the outer periphery of the flange, even if air is trapped between the tapes to form an air film, the tape is formed. The winding disorder of the loop is effectively prevented, and it is wound in a good winding shape. Further, since the tape width direction is regulated in a non-contact manner by the flow of air, the tape edge is not damaged during winding at a high speed. As a result, even in the magnetic tape cartridge, the disorder of the winding of the magnetic tape which occurs when the magnetic tape is wound at a high speed is prevented, and the magnetic tape has a good winding shape and excellent magnetic reliability. A tape cartridge is obtained.

【０００６】これに対し、空気流入用貫通孔や空気流出
用凹溝のないフランジを用いた従来の磁気テ−プ用テ−
プリ−ルでは、磁気テ−プの高速巻き取り時に、磁気テ
−プ間に空気が巻き込まれて空気膜が形成され、この空
気膜の厚さが磁気テ−プの磁性層表面または裏面の表面
粗さ以上になると、磁気テ−プ間に摩擦力が働かなくな
り、なんらかの原因で発生した磁気テ−プ幅方向にかか
る微小な外力により、磁気テ−プ間ですべりが発生して
巻き乱れが生じる。On the other hand, a conventional tape for magnetic tape using a flange without an air inflow through hole or an air outflow groove.
In the reel, during high-speed winding of the magnetic tape, air is entrapped between the magnetic tapes to form an air film, and the thickness of the air film is the thickness of the magnetic layer surface or the back surface of the magnetic tape. If the surface roughness is exceeded, the frictional force will not work between the magnetic tapes, and a slight external force applied in the width direction of the magnetic tapes generated for some reason will cause slippage between the magnetic tapes and disturb the winding. Occurs.

【０００７】[0007]

【実施例】以下、この発明に係るテ−プリ−ルおよびこ
のテ−プリ−ルを装着した磁気テ−プカ−トリッジの一
実施例を示す図１ないし図３に基づいて説明する。図１
および図２はこの発明のテ−プリ−ルを示したもので、
このテ−プリ−ル１は、下フランジ２と一体成形された
テ−プ巻芯３の上端面に上フランジ４を定着して構成さ
れ、上フランジ４の内面にテ−プ巻芯３から上フランジ
４の外周近傍にかけて放射状に伸びる５個の空気流出用
凹溝５が等間隔に設けられている。また、これら各空気
流出用凹溝５のテ−プ巻芯３側内端部に連通する空気流
入用貫通孔６が上フランジ４に穿設されている。７はテ
−プ８端をテ−プ巻芯３に固定するためのクランクピ−
スである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a tape reel according to the present invention and a magnetic tape cartridge equipped with this tape reel will be described below with reference to FIGS. Figure 1
And FIG. 2 shows a tape of the present invention,
The tape reel 1 is constructed by fixing an upper flange 4 to an upper end surface of a tape winding core 3 integrally formed with a lower flange 2, and the tape winding core 3 is attached to an inner surface of the upper flange 4. Five air outflow grooves 5 extending radially are provided at equal intervals in the vicinity of the outer periphery of the upper flange 4. Further, an air inflow through hole 6 communicating with the inner end portion of each air outflow groove 5 on the tape winding core 3 side is formed in the upper flange 4. Reference numeral 7 is a crank pin for fixing the end of the tape 8 to the tape winding core 3.
It is.

【０００８】しかして、このようなテ−プリ−ル１に、
図２に示すようにビデオテ−プ等のテ−プ８が高速で巻
き取られるときは、その遠心力により矢印Ａで示すよう
に空気流入用貫通孔６から空気が上フランジ４の内側に
入り込み、空気流出用凹溝５を通ってテ−プ巻芯３から
フランジ４外周方向に矢印Ｂに示すような空気の流れが
生じる。このため、テ−プ巻芯３からフランジ４外周方
向に流れる空気の流れによりテ−プ幅方向に規制力が加
わり、たとえテ−プ８間に空気が巻き込まれて空気膜が
形成されても、テ−プ８の巻き乱れが効果的に防止され
て、良好な巻き姿でテ−プ８がテ−プリ−ル１に巻回さ
れる。また、テ−プ８の幅方向への規制が、空気の流れ
によって非接触で行われるため、高速での巻き取り時に
テ−プエッジを損傷させることもない。However, in such a tape reel 1,
As shown in FIG. 2, when a tape 8 such as a video tape is wound at high speed, the centrifugal force causes air to enter the inside of the upper flange 4 from the air inlet through hole 6 as indicated by an arrow A. An air flow as indicated by an arrow B is generated from the tape winding core 3 through the air outflow groove 5 in the outer peripheral direction of the flange 4. Therefore, even if a regulating force is applied in the tape width direction by the flow of air flowing from the tape winding core 3 in the outer peripheral direction of the flange 4, even if air is trapped between the tapes 8 and an air film is formed. The winding disorder of the tape 8 is effectively prevented, and the tape 8 is wound around the tape reel 1 in a good winding form. Further, since the tape 8 is regulated in the width direction in a non-contact manner by the flow of air, the tape edge is not damaged during winding at a high speed.

【０００９】なお、図１および図２で示したテ−プリ−
ル１では、上フランジ４の内面に、テ−プ巻芯３から上
フランジ４の外周近傍にかけて放射状に伸びる５個の空
気流出用凹溝５を等間隔で設けているが、この空気流出
用凹溝５の数や配置は特に限定されず、偶数個の空気流
出用凹溝５を対称に設けてもよく、また適数個の空気流
出用凹溝５を等間隔にせず不規則に配置してもよい。さ
らにこの空気流出用凹溝５は少なくとも１個以上設けれ
ばその効果が発揮され、適宜増減できる。またこの空気
流出用凹溝５は、上フランジ４の外周近傍からさらに延
長して上フランジ４の外周端縁まで設けてもよい。The tape shown in FIGS. 1 and 2 is used.
In the rule 1, the five air outflow grooves 5 extending radially from the tape winding core 3 to the vicinity of the outer periphery of the upper flange 4 are provided on the inner surface of the upper flange 4 at equal intervals. The number and arrangement of the recessed grooves 5 are not particularly limited, and an even number of recessed grooves 5 for air outflow may be provided symmetrically, and an appropriate number of recessed grooves 5 for air outflow are not arranged at equal intervals and are arranged irregularly. You may. Further, if at least one groove 5 for air outflow is provided, the effect is exhibited, and the number can be appropriately increased or decreased. Further, the air outflow groove 5 may be further extended from the vicinity of the outer periphery of the upper flange 4 to the outer peripheral edge of the upper flange 4.

【００１０】さらに、各空気流出用凹溝５に連通する空
気流入用貫通孔６は、テ−プ巻芯３側内端部のみに限ら
ず、１個の空気流出用凹溝５に対して２個以上の空気流
入用貫通孔６を設けて、それらを連通させてもよい。ま
た、このような空気流出用凹溝５および空気流入用貫通
孔６は、上フランジ４に代えて下フランジ２に設けても
よく、この場合も同じ効果が発揮される。Further, the air inflow through hole 6 communicating with each air outflow groove 5 is not limited to only the inner end portion on the tape winding core 3 side, but for one air outflow groove 5. Two or more air inflow through holes 6 may be provided to communicate with each other. Further, the air outflow groove 5 and the air inflow through hole 6 may be provided in the lower flange 2 instead of the upper flange 4, and in this case, the same effect is exhibited.

【００１１】テ−プリ−ル１はこのようにして構成さ
れ、このテ−プリ−ル１にビデオテ−プ８を巻回させ
て、図３に示すように上下の半割ケ−ス９ａ，９ｂを蓋
合わせ状にねじで結合して構成された磁気テ−プカ−ト
リッジの本体ケ−ス１０に左右対をなして装着すれば、
磁気テ−プカ−トリッジが得られる。The tape reel 1 is constructed in this manner. A video tape 8 is wound around the tape reel 1 to form upper and lower half-split casings 9a, 9a as shown in FIG. 9b is attached to the main body case 10 of the magnetic tape cartridge which is constructed by screwing 9b together in a lid-like manner to form a pair.
A magnetic tape cartridge is obtained.

【００１２】この磁気テ−プカ−トリッジにおいて、ビ
デオテ−プ８が高速で巻き取られるときは、回転時の遠
心力により空気流入用貫通孔６から空気が上フランジ４
の内側に入り込み、空気流出用凹溝５を通ってテ−プ巻
芯３からフランジ外周方向に空気の流れが生じる。従っ
て、テ−プ巻芯３からフランジ外周方向に流れる空気の
流れによりテ−プ幅方向に規制力が加わり、たとえビデ
オテ−プ８間に空気が巻き込まれて空気膜が形成されて
も、ビデオテ−プ８の巻き乱れが効果的に防止されて、
良好な巻き姿でビデオテ−プ８がテ−プリ−ル１に巻回
される。また、ビデオテ−プ８の幅方向への規制が、空
気の流れによって非接触で行われるため、高速での巻き
取り時にビデオテ−プ８のエッジを損傷させることもな
い。In this magnetic tape cartridge, when the video tape 8 is wound at a high speed, air is forced from the through hole 6 for air inflow to the upper flange 4 by centrifugal force during rotation.
Of the tape, and the air flows from the tape winding core 3 to the outer peripheral direction of the flange through the air outflow groove 5. Therefore, even if a restricting force is applied in the tape width direction by the flow of air flowing from the tape winding core 3 in the outer peripheral direction of the flange, even if air is trapped between the video tapes 8 and an air film is formed, the video tape is formed. -The winding disorder of the boop 8 is effectively prevented,
The video tape 8 is wound around the tape reel 1 in a good winding state. Further, since the video tape 8 is regulated in the width direction in a non-contact manner by the air flow, the edge of the video tape 8 is not damaged during high-speed winding.

【００１３】なお、図３において１１は上方の半割ケ−
ス９ａに設けられたビデオテ−プ巻量視認用の透明窓で
あり、１２は上方の半割ケ−ス９ａに開閉可能に枢支さ
れて、本体ケ−ス１０の前面を蓋する前蓋である。In FIG. 3, numeral 11 is an upper half case.
Reference numeral 12 is a transparent window provided on the case 9a for visually observing the amount of winding of the video tape, and 12 is pivotably supported by the upper half case 9a so as to be openable and closable to cover the front surface of the main body case 10. Is.

【００１４】このようにこの発明のテ−プリ−ルは、磁
気テ−プカ−トリッジに装着して使用されるほか、種々
の磁気テ−プや磁気テ−プ以外のテ−プを巻回するテ−
プリ−ルに広く適用でき、磁気テ−プ巻回用としては、
さらに、２インチビデオテ−プ、１インチビデオテ−
プ、オ−ディオオ−プンリ−ルテ−プ、オ−ディオディ
ジタルマスタリングテ−プ、コンピュ−タテ−プ等のオ
−プンリ−ル方式や、ＶＨＳ、Ｂｅｔａ、８mmビデオ、
Ｈｉ８、Ｕマチック、ＢＥＴＡＣＡＭ、ＢＥＴＡＣＡＭ
−ＳＰ、Ｄ１、Ｄ２等のカ−トリッジタイプのものなど
に適用できる。As described above, the tape of the present invention is used by mounting it on a magnetic tape cartridge and winding various magnetic tapes and tapes other than the magnetic tape. Do it
Widely applicable to the reel, and for magnetic tape winding,
2 inch video tape, 1 inch video tape
Open-loop systems such as audio, audio-open reel tape, audio digital mastering tape, computer tape, VHS, Beta, 8mm video,
Hi8, Umatic, BETACAM, BETACAM
-Applicable to cartridge types such as SP, D1 and D2.

【００１５】以下、この発明のテ−プリ−ルを装着した
磁気テ−プカ−トリッジの試験例について説明する。 試験例１ α−Ｆｅ磁性粉末 600重量部 エスレックＣＮ（積水化学工業社製、塩化ビニル−酢酸ビニ 80 〃 ル−ビニルアルコ−ル共重合体） パンデックスＴ−５２５０（大日本インキ化学工業社製、ウ 30 〃 レタンエラストマ−） コロネ−トＬ（日本ポリウレタン工業社製、三官能性低分子 10 〃 量イソシアネ−ト化合物） メチルイソブチルケトン 400 〃 トルエン 400 〃 この組成物をボ−ルミル中で７２時間混合分散して磁性
塗料を調製した。次いで、この磁性塗料を厚さ 9.8μｍ
のポリエステルフイルム上に、塗布、乾燥して厚さが１
３μｍの磁性層を形成し、１９mm幅に裁断して、長さ１
６７０ｍのビデオテ−プをつくった。次いで、このよう
にして得られたビデオテ−プ８を、図１および図２に示
すテ−プリ−ル１に巻回し、このビデオテ−プ８を巻回
した一対のテ−プリ−ル１を、図３に示すビデオ用磁気
テ−プカ−トリッジの本体ケ−ス１０内に装着して、ビ
デオ用磁気テ−プカ−トリッジを作成した。A test example of a magnetic tape cartridge equipped with the tape of the present invention will be described below. Test Example 1 α-Fe magnetic powder 600 parts by weight S-REC CN (manufactured by Sekisui Chemical Co., Ltd., vinyl chloride-vinyl acetate 80 〃-vinyl alcohol copolymer) Pandex T-5250 (manufactured by Dainippon Ink and Chemicals, Inc. C 30 〃 Retan Elastomer) Coronet L (Nippon Polyurethane Industry Co., Ltd., trifunctional low molecular weight 10 〃 isocyanate compound) Methyl isobutyl ketone 400 〃 Toluene 400 〃 This composition in a ball mill for 72 hours A magnetic paint was prepared by mixing and dispersing. Next, apply this magnetic paint to a thickness of 9.8 μm.
It is applied and dried on the polyester film of
Form a magnetic layer of 3μm, cut it to a width of 19mm, and cut it to a length of 1
I made a 670m video tape. Then, the thus obtained video tape 8 is wound around a tape reel 1 shown in FIGS. 1 and 2, and a pair of tape reels 1 around which the video tape 8 is wound are wound. The magnetic tape cartridge for video was prepared by mounting it in the main case 10 of the magnetic tape cartridge for video shown in FIG.

【００１６】試験例２ 試験例１と同様にしてビデオテ−プをつくり、このビデ
オテ−プを、従来の上フランジに空気流出用凹溝および
空気流入用貫通孔が形成されていないテ−プリ−ルに巻
回した以外は、試験例１と同様にしてビデオテ−プ用磁
気テ−プカ−トリッジを作成した。Test Example 2 A video tape was produced in the same manner as in Test Example 1, and this video tape was used in the conventional upper flange in which a groove for air outflow and a through hole for air inflow were not formed. A magnetic tape cartridge for a video tape was prepared in the same manner as in Test Example 1 except that the magnetic tape cartridge was wound around a reel.

【００１７】各試験例で得られたビデオテ−プ用磁気テ
−プカ−トリッジを、ソニ−社製；デジタルＶＴＲ Ｄ
２（ＤＶＲ−１８）に装填し、シャトルモ−ドで１〜１
００倍速（テ−プ巻き取り速度：0.13〜１３ｍ／sec ）
まで速度を変化させてシャトルサ−チ走行を行った。そ
して、各種巻き取り速度で走行後、各磁気テ−プカ−ト
リッジ内の巻き取り側テ−プリ−ル１を取り出し、上フ
ランジ４を取り外したのち、テ−プ巻芯３から約１０mm
はなれた部分のビデオテ−プ８上エッジの円周方向の断
面形状における中心線平均粗さ（Ｒａ）を、表面粗さ計
（東京精密社製；サ−フコム１０００Ａ）で測定し、ビ
デオテ−プの巻乱れを調べた。The magnetic tape cartridge for video tape obtained in each test example was manufactured by Sony Corporation; Digital VTR D
2 (DVR-18), and shuttle mode 1-1
00 times speed (tape winding speed: 0.13 to 13 m / sec)
The shuttle search was performed by changing the speed until. After traveling at various winding speeds, the winding side taper 1 in each magnetic tape cartridge is taken out, the upper flange 4 is removed, and then about 10 mm from the tape winding core 3.
The center line average roughness (Ra) in the cross-sectional shape in the circumferential direction of the upper edge of the video tape 8 in the separated portion is measured with a surface roughness meter (Tokyo Seimitsu Co., Ltd .; Surfcom 1000A), and the video tape is measured. I investigated the winding disorder.

【００１８】図４は試験例１および２におけるビデオテ
−プの巻き取り速度とビデオテ−プの巻き乱れ度を示す
エッジ円周方向断面の中心線平均粗さ（Ｒａ）との関係
をグラフで示したもので、試験例２で得られた磁気テ−
プカ−トリッジでは、ビデオテ−プ巻き取り速度が 3.9
ｍ／sec を越えるとビデオテ−プの巻き乱れ度が急速に
増加するのに対し、この発明で得られたビデオ用磁気テ
−プカ−トリッジ（試験例１）では、ビデオテ−プ巻き
取り速度が増加してもビデオテ−プの巻き乱れ度がほと
んど変化せず、ビデオテ−プの巻き乱れが効果的に防止
されている。FIG. 4 is a graph showing the relationship between the take-up speed of the video tape and the center line average roughness (Ra) of the cross section in the edge circumferential direction, which shows the winding disorder degree of the video tape, in Test Examples 1 and 2. The magnetic tape obtained in Test Example 2
The video tape take-up speed is 3.9 with the Puck Cartridge.
When it exceeds m / sec, the degree of winding disorder of the video tape increases rapidly, whereas in the magnetic tape cartridge for video (Test Example 1) obtained by the present invention, the video tape winding speed is increased. Even if it increases, the degree of winding disorder of the video tape hardly changes, and the disorder of winding of the video tape is effectively prevented.

【００１９】[0019]

【発明の効果】以上説明したように、この発明のテ−プ
リ−ルによれば、テ−プ巻き取り時のテ−プの巻き乱れ
を充分に防止して、良好な巻き姿でテ−プを巻き取るこ
とができ、このテ−プリ−ルを装着したこの発明の磁気
テ−プカ−トリッジは、磁気テ−プの巻き乱れが効果的
に防止されて、磁気テ−プが良好な巻き姿で巻き取ら
れ、信頼性が向上されることがわかる。As described above, according to the tape of the present invention, the tape winding can be sufficiently prevented from being disturbed when the tape is wound up, and the tape can be wound in a good shape. The magnetic tape cartridge according to the present invention, which can wind up the tape and is equipped with the tape reel, effectively prevents the magnetic tape from being disturbed in winding, and has a good magnetic tape. It can be seen that the product is wound up in a winding form and the reliability is improved.

【００２０】[0020]

【図面の簡単な説明】[Brief description of drawings]

【図１】この発明のテ−プリ−ルの一実施例を示す一部
切欠拡大斜視図である。FIG. 1 is a partially cutaway enlarged perspective view showing an embodiment of a tape reel of the present invention.

【図２】図１に示すテ−プリ−ルの断面図である。FIG. 2 is a cross-sectional view of the tape reel shown in FIG.

【図３】この発明のテ−プリ−ルを装着したビデオ用磁
気テ−プカ−トリッジの一実施例を示す斜視図である。FIG. 3 is a perspective view showing an embodiment of a magnetic tape cartridge for video equipped with a tape reel of the present invention.

【図４】試験例１および２で得られたビデオ用磁気テ−
プカ−トリッジにおけるビデオテ−プの巻き取り速度と
ビデオテ−プの巻き乱れ度との関係図である。FIG. 4 is a magnetic tape for video obtained in Test Examples 1 and 2.
FIG. 3 is a diagram showing the relationship between the winding speed of a video tape and the degree of winding disorder of the video tape in the maker cartridge.

【図５】従来の磁気テ−プカ−トリッジの一例を示す内
面図である。FIG. 5 is an inner view showing an example of a conventional magnetic tape cartridge.

【図６】従来の磁気テ−プカ−トリッジの他の例を示す
内面図である。FIG. 6 is an inner view showing another example of a conventional magnetic tape cartridge.

【符号の説明】[Explanation of symbols]

１…テ−プリ−ル ２…下フランジ ３…テ−プ巻芯 ４…上フランジ ５…空気流出用凹溝 ６…空気流入用貫通孔 ８…テ−プ（ビデオテ−プ） １０…本体ケ−ス DESCRIPTION OF SYMBOLS 1 ... Tape pull 2 ... Lower flange 3 ... Tape core 4 ... Upper flange 5 ... Air outflow groove 6 ... Air inflow through hole 8 ... Tape (video tape) 10 ... Main body case −

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 テ−プリ−ルの上下いずれか一方のフラ
ンジの内面にテ−プ巻芯からフランジ外周にかけて放射
状に伸びる空気流出用凹溝を設け、この空気流出用凹溝
に連通する空気流入用貫通孔をフランジに穿設したこと
を特徴とするテ−プリ−ル1. An air outflow groove extending radially from the tape winding core to the outer periphery of the flange is provided on the inner surface of one of the upper and lower flanges of the tape reel, and air communicating with the air outflow groove is provided. A tape reel having an inflow through hole formed in a flange. 【請求項２】 磁気テ−プカ−トリッジの本体内に、テ
−プリ−ルの上下いずれか一方のフランジの内面にテ−
プ巻芯からフランジ外周にかけて放射状に伸びる空気流
出用凹溝を設けるとともに、この空気流出用凹溝に連通
する空気流入用貫通孔をフランジに穿設した一対のテ−
プリ−ルを装着し、各テ−プリ−ル間に磁気テ−プを巻
回させてなる磁気テ−プカ−トリッジ2. A magnetic tape cartridge has a main body, and a tape is formed on the inner surface of one of the upper and lower flanges of the tape reel.
A pair of tapes is provided in which a groove for air outflow extending radially from the winding core to the outer periphery of the flange is provided, and an air inflow through hole communicating with the groove for air outflow is formed in the flange.
Magnetic tape cartridge with a tape attached and a magnetic tape wound around each tape reel.