JPS58222474A - Magnetic tape guide roll - Google Patents
Magnetic tape guide rollInfo
- Publication number
- JPS58222474A JPS58222474A JP21584182A JP21584182A JPS58222474A JP S58222474 A JPS58222474 A JP S58222474A JP 21584182 A JP21584182 A JP 21584182A JP 21584182 A JP21584182 A JP 21584182A JP S58222474 A JPS58222474 A JP S58222474A
- Authority
- JP
- Japan
- Prior art keywords
- barrel
- inner cylinder
- magnetic tape
- cylinder
- circumference
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
-
- 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
- G11B15/60—Guiding record carrier
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C2045/1682—Making multilayered or multicoloured articles preventing defects
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
この発明は、磁気テープを備えた録音カセットやビデオ
カセットにおいて、テープの走行変更部等に設ける案内
ローラーに関するもので、その目的は、主にテープを斑
なく均一に案内し得るようにすることにある。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a guide roller provided at a tape running change section in a recording cassette or a video cassette equipped with a magnetic tape, and its main purpose is to guide the tape evenly and without unevenness. The purpose is to make it possible.
従来の録音カセットやビデオカセット（以後カセットと
略す）に用いられているテープの案内ローラーは、主に
射出成形にて形成されていたため、ローラーの外面にヒ
ケが生じ、両端部より中央部が凹み鼓状となる欠点があ
った０上記の如くローラーの中央部が凹んでいると、そ
のｐ−ラー外面にテープが圧接しながら走行した場合、
テープの両端に皺が生じ、音質や画像に悪影響を与えた
り、テープの巻取りに支障を与える等の不都合があった
。The tape guide rollers used in conventional recording cassettes and video cassettes (hereinafter referred to as cassettes) were mainly formed by injection molding, resulting in sink marks on the outer surface of the rollers and dents in the center from both ends. If the center of the roller is concave as described above, when the tape runs while being pressed against the outer surface of the roller,
Wrinkles occur at both ends of the tape, which has an adverse effect on sound quality and images, and causes problems in winding the tape.
そこでこの発明は、合成樹脂製ローラーの外面にヒケに
よる凹みが生じないように形成し得ないものかと研究し
た所、ローラーの周壁を内筒とその外周に後から一体成
形する外筒の二層構造と成すことによって、従来の欠点
を一挙に改良することに成功したものである。Therefore, this invention was developed by researching whether it is possible to form a synthetic resin roller on its outer surface to prevent dents caused by sink marks, and found that the peripheral wall of the roller is made of two layers: an inner cylinder and an outer cylinder that is later integrally molded on the outer periphery of the roller. With this new structure, we succeeded in alleviating the drawbacks of the conventional technology.
次に本発明ローラーの構造を実施例の図面により説明す
ると、中心部に貫通孔（５）を有する内筒（３）の外周
に、後から内筒（３）より薄肉の外筒（４）を一体成形
し、ローラー（１）の周壁（２）を内筒（３）と外筒（
４）から成る二層構造と成し、二層構造の周壁（２）を
従来ローラーの周壁厚さくｔｌと同じに形成するもので
、先に形成する周壁内筒（３）はその外面（３）中央部
にヒケによる凹み（７）を生ずるが、特に内筒（３）の
内周側にリプや側壁が設けられていると、リブ形成位置
の反対側外面（３ψに、肉厚変化に応じたヒケな２０〜
３０ミクｐンで生じるが、この内筒（３）を雄型として
その外周に薄肉の外筒（４）が後から一体成形されるた
め、内筒（３）の凹み（７）まで外筒（４）が埋まり、
外筒（４）の外面（４ψにはとケによる凹み（７）が５
ミクロン以下しか生じない。Next, to explain the structure of the roller of the present invention with reference to drawings of embodiments, an outer cylinder (4) thinner than the inner cylinder (3) is attached to the outer periphery of the inner cylinder (3) having a through hole (5) in the center. are integrally molded, and the peripheral wall (2) of the roller (1) is made of an inner cylinder (3) and an outer cylinder (
The circumferential wall (2) of the two-layer structure is formed to have the same thickness tl as the circumferential wall of a conventional roller, and the inner cylinder (3) of the circumferential wall formed first has a thickness tl of the outer surface (3). ) A dent (7) is formed in the center due to sink marks, but especially if a lip or side wall is provided on the inner circumference of the inner cylinder (3), the wall thickness change will occur on the outer surface (3ψ) opposite to where the rib is formed. 20~
This occurs at 30 microns, but since this inner cylinder (3) is made into a male mold and a thin outer cylinder (4) is later integrally molded around its outer periphery, the outer cylinder extends up to the recess (7) of the inner cylinder (3). (4) is filled,
The outer surface of the outer cylinder (4) (4ψ has a recess (7) caused by the toothbrush at 5).
Only microns or less are produced.
又内筒（３）の外周（３のに軸方向と平行する凹溝（８
）を１個所以上設け、該内筒（３）の外周に後から外筒
（４）を一体成形すれば、外筒（４）の一部が内筒（３
）の凹溝（８）内まで形成されるため、内筒（３）とそ
の外周に一体成形した外筒（４）が共回りしなくなると
共に、外筒成形用ゲー）（Ｇ■の接続が容易になるし、
内筒貫通孔（５）の上下端部に、貫通孔（５）より１回
り大きい環状溝（６）を設け、環状溝（６）に内筒成形
用ゲー）（Ｇυを接続し得るようにし、環状溝（６）に
ゲート跡ＴＭ）が残っても、ローラー（１）の嵌挿に支
障を与えないようにすることが望ましいし、周壁内筒（
３）より外筒（４）を短かく形成し、外筒（４）の両端
から内筒（３）が□僅かに突出するようにし、外筒（４
）の上下端にゲート跡ＩＭＩが残っても、内筒（３）よ
り洩出しないようにすることが望ましく、更にカセット
（０）の軸ｔｓ＋に触れる周壁内筒（３）を摩擦に強い
合成樹脂より形成し、テープ（Ｔｌに触れる外筒（４）
を、テープＩＴＩとの接触が良好な合成樹脂より形成し
、或は周壁内筒（３）と外筒（４）の何れか一方に着色
を施すか、両方に異なる着色を施して周壁（２）をカラ
フルに形成するものである。In addition, there is a concave groove (8) parallel to the axial direction on the outer circumference (3) of the inner cylinder (3).
) is provided at one or more locations, and if the outer cylinder (4) is later integrally molded on the outer periphery of the inner cylinder (3), a part of the outer cylinder (4) becomes the inner cylinder (3).
) is formed to the inside of the concave groove (8), so the inner cylinder (3) and the outer cylinder (4) integrally molded on its outer periphery do not rotate together, and the connection of the outer cylinder molding gate (G) It becomes easier,
An annular groove (6) that is one size larger than the through hole (5) is provided at the upper and lower ends of the inner cylinder through hole (5), so that the inner cylinder molding gate (Gυ) can be connected to the annular groove (6). Even if gate marks TM) remain in the annular groove (6), it is desirable to prevent the insertion and insertion of the roller (1) from becoming a hindrance.
3) The outer cylinder (4) is formed shorter than the outer cylinder (4) so that the inner cylinder (3) slightly protrudes from both ends of the outer cylinder (4).
) Even if gate marks IMI remain at the upper and lower ends of the cassette (0), it is desirable to prevent them from leaking out from the inner cylinder (3), and furthermore, the peripheral wall of the inner cylinder (3) that touches the axis ts+ of the cassette (0) should be made of a friction-resistant synthetic material. Outer cylinder (4) made of resin and touching the tape (Tl)
The surrounding wall (2) is made of a synthetic resin that has good contact with the tape ITI, or either the inner cylinder (3) or the outer cylinder (4) of the peripheral wall is colored, or both of them are colored differently. ) in a colorful manner.
尚、本発明は案内ローラー（１）と同時に使用する磁気
テープ＋Ｔｌの巻取りハブにも応用し得る。Incidentally, the present invention can also be applied to a winding hub for magnetic tape + Tl used simultaneously with the guide roller (1).
本発明のローラーは上記構造の如く、先ず周壁内筒（３
）を製作した後、該内筒（３）を雄型としてその外周に
外筒（４）を一体成形し、内筒（３）の中央部外面（３
ψに生じたヒケによる凹み（７）に、後から形成する外
筒（４）の一部が埋り、所定の肉厚を有するローラー帽
１２）を形成するもので、肉厚の変化が少なくなるほど
ヒケによる凹み（７）が少なくなる合成樹脂特有の特徴
を利用し、周壁を内筒（３）と外筒（４）の二層に形成
するものであるから、ローラー（１）の外面となる外筒
（４）の外、面（４ψにはヒケによる凹み（７）がほと
んど生じない。例えヒケが生じても、外筒（４）の肉厚
変化に応じた分しか生じないので、周壁（２）を一層で
形成するものよりヒケによる凹み（７）がへ以下の３ミ
クｐン以下しか生じない。その結果、本発明ローラーに
よってテープを案内しても、テープの両側に皺が生ずる
ことがなく、テープを均一に斑なく案内することができ
る。又本発明ローラーは周壁（２）を内筒（３）と外筒
（４）より成る二層構造に形成するものであるから、ロ
ーラー（１）の周壁内筒（３）を軸支に適した材質で形
成し、ローラーの周壁外筒（４）をテープ（Ｔｌの案内
走行に適した材質で形成することができるばかりか、内
筒と外筒に着色を施して回転するローラーの周壁なカラ
フルにすることもできる。しかも外筒を内筒より短かく
形成すれば、外筒に例えゲート跡が残っても、ローラー
の回転やテープの案内には支障を与えることがない等、
本発明は磁気テープによる録音や録画、或は再生の向上
と、音質及び画像の安定向上を目的とした案内ローラー
、或はテープ看取りハブとして有益な効果を奏するもの
である。The roller of the present invention has the above-mentioned structure, first of all, the inner cylinder of the peripheral wall (3
), the inner cylinder (3) is made into a male mold, and the outer cylinder (4) is integrally molded around the outer circumference of the inner cylinder (3).
A part of the outer cylinder (4) to be formed later is filled in the dent (7) caused by the sink mark on ψ, forming a roller cap 12) with a predetermined wall thickness, so there is little change in wall thickness. It is true that the outer surface of the roller (1) and There are almost no dents (7) caused by sink marks on the outer surface (4ψ) of the outer cylinder (4). Even if sink marks occur, they will only occur by the amount corresponding to the change in the wall thickness of the outer cylinder (4). Compared to a case in which the peripheral wall (2) is formed of a single layer, the dent (7) caused by sink marks is less than 3 μm.As a result, even when the tape is guided by the roller of the present invention, there are no wrinkles on both sides of the tape. The tape can be guided uniformly and without unevenness.Also, since the roller of the present invention has a peripheral wall (2) formed in a two-layer structure consisting of an inner cylinder (3) and an outer cylinder (4), Not only can the inner cylinder (3) of the peripheral wall of the roller (1) be formed of a material suitable for shaft support, and the outer cylinder (4) of the peripheral wall of the roller can be formed of a material suitable for guiding the tape (Tl). It is also possible to color the inner and outer cylinders to make the surrounding walls of the rotating roller colorful.Furthermore, if the outer cylinder is made shorter than the inner cylinder, even if gate marks remain on the outer cylinder, the rollers can be easily removed. It does not interfere with rotation or tape guidance, etc.
INDUSTRIAL APPLICABILITY The present invention has a beneficial effect as a guide roller or a tape monitoring hub for the purpose of improving recording and reproduction using magnetic tape and stabilizing sound quality and images.
第１図（イ）（ロ）は本発明ローラーの平面図、第２図
（イ）（ロ）と第３図イ）（ロ）はその構造例を示す縦
断面図、第４図（イ）（ロ）（ハ）は類例ローラーの平
面図、第５図（（）（ロ）（ハ）は従来ローラーの平面
図とその構造例を示す縦断面図、第６図乃至第８図は本
発明ローラーの極造工程図、第９図は本発明ローラーの
使用状態を示す断面図、第１０図と第１１図は本発明ロ
ーラーを嵌挿したカセットの平面図、第１２図はテープ
看取りハブ本体の正面図、第１３図はそのＸ−Ｘ線矢視
の断面図、第１４図と第１５図は周壁の形成例を示す拡
大断面図である。
（１）・・ローラー、（２）・・周壁、（３）・・内筒
、（４）・・外筒、（３ψ（４荀・・外面、（５）・・
貫通孔、（６）・・環状溝、（７）・・凹み、（８）・
・凹溝、（Ｃ）・・カセット、（Ｇυ（Ｇ２・・ゲート
、−）・・ゲート跡、ｔｓ＋・・軸、ＴＴＩ・・テープ
、ｔｔｌ・・周壁厚さ
第６図
手続補正書（方式）
昭和５８年７月
特許庁長官 若 杉 和 夫殿
１、事件の表示 昭和 ５７年特許願第２１５８４１号
２、発明の名称 磁気テープ用案内ローラー３、補正
をする者
事件との関係 特許出願人
４、代理人 〒９３０ 置（０７６４）２８−５４
３３住 所 富山県富山市千石町２丁目８氏
名 Ｃ１６９４）弁理士 宮 １） 友５補
正命令の日付 昭和５８年６月２８日乙補正の対象
図 面
７補正の内容 図面の第４図を別紙の通り補正する。Figures 1 (a) and (b) are plan views of the roller of the present invention, Figures 2 (a) and (b) and Figures 3 a and 3 are longitudinal cross-sectional views showing examples of its structure, and Figure 4 (i). ) (B) (C) are plan views of similar rollers, FIG. Figure 9 is a cross-sectional view showing how the roller of the present invention is used, Figures 10 and 11 are plan views of a cassette in which the roller of the present invention is inserted, and Figure 12 is a tape inspection diagram. A front view of the hub body, FIG. 13 is a cross-sectional view taken along the line X-X, and FIGS. 14 and 15 are enlarged cross-sectional views showing examples of forming the peripheral wall. (1) Roller, (2 )...Peripheral wall, (3)...Inner tube, (4)...Outer tube, (3ψ(4荀...Outer surface, (5)...
Through hole, (6)... annular groove, (7)... recess, (8)...
・Concave groove, (C)...Cassette, (Gυ(G2...Gate, -)...Gate trace, ts+...Shaft, TTI...Tape, TTL...Peripheral wall thickness Figure 6 Procedure amendment form (method) ) Kazuo Wakasugi, Commissioner of the Japan Patent Office in July 19801, Indication of the case Patent Application No. 215841 of 19822, Title of the invention Guide roller for magnetic tape 3, Relationship to the amended person case Patent applicant 4. Agent 〒930 (0764) 28-54
33 Address: 2-8 Sengokucho, Toyama City, Toyama Prefecture
Name C1694) Patent Attorney Miya 1) Date of Amended Order to Friend 5 June 28, 1980 Subject of Amendment B
Contents of amendment to Drawing Plane 7 Figure 4 of the drawings will be corrected as shown in the attached sheet.
Claims (1)
、周壁を内筒と外筒の二層構造と成し、周壁の外面にヒ
ケによる四みが生じないようにした磁気テープ用案内田
−ラー０ ２）内筒の外周に軸方向と平行する凹溝を設け、内筒と
その外周に設けた外筒が共回りしないようにした二層構
造の周壁である特許請求の範囲第１項に記載の磁気テー
プ用案内ローラー。 ３）内筒より外筒を短かくシ、外筒の両端より内筒が僅
かに突出する二層構造の周壁である特許請求の範囲第１
項又は第２項に記載の磁気テープ用案内ローラー。[Scope of Claims] 1) An outer cylinder is integrally provided on the outer periphery of the inner cylinder, with the inner cylinder being a male type, and the peripheral wall has a two-layer structure of the inner cylinder and the outer cylinder, and the outer surface of the peripheral wall is free from sink marks. 2) A two-layer structure with grooves parallel to the axial direction provided on the outer periphery of the inner cylinder to prevent the inner cylinder and the outer cylinder provided on its outer periphery from rotating together. The magnetic tape guide roller according to claim 1, which is a peripheral wall of a structure. 3) The outer cylinder is shorter than the inner cylinder, and the inner cylinder slightly protrudes from both ends of the outer cylinder.
The magnetic tape guide roller according to item 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21584182A JPS58222474A (en) | 1982-12-09 | 1982-12-09 | Magnetic tape guide roll |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21584182A JPS58222474A (en) | 1982-12-09 | 1982-12-09 | Magnetic tape guide roll |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1947883A Division JPS58222473A (en) | 1983-02-08 | 1983-02-08 | Magnetic tape reel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58222474A true JPS58222474A (en) | 1983-12-24 |
Family
ID=16679147
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21584182A Pending JPS58222474A (en) | 1982-12-09 | 1982-12-09 | Magnetic tape guide roll |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58222474A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6298080U (en) * | 1986-12-03 | 1987-06-22 | ||
| JPS63255861A (en) * | 1987-04-11 | 1988-10-24 | Yobea Rulon Kogyo Kk | Magnetic tape guide roller |
| JPH01181181U (en) * | 1988-06-13 | 1989-12-27 | ||
| JPH04189116A (en) * | 1990-11-22 | 1992-07-07 | Gogou Kagaku Kk | Gear made of synthetic resin and its manufacture |
| WO1993003484A1 (en) * | 1991-07-31 | 1993-02-18 | Sony Corporation | Tape guide roller for tape cassette and method of making said roller |
| EP1115115A2 (en) * | 1999-12-06 | 2001-07-11 | Fuji Photo Film Co., Ltd. | Magnetic tape cassette, guide roller, and a method of manufacturing a guide roller |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5483963A (en) * | 1977-12-16 | 1979-07-04 | Hitachi Maxell Ltd | Manufacture of driving cam for reciprocating small-sized electrical apparatuses |
-
1982
- 1982-12-09 JP JP21584182A patent/JPS58222474A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5483963A (en) * | 1977-12-16 | 1979-07-04 | Hitachi Maxell Ltd | Manufacture of driving cam for reciprocating small-sized electrical apparatuses |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6298080U (en) * | 1986-12-03 | 1987-06-22 | ||
| JPS63255861A (en) * | 1987-04-11 | 1988-10-24 | Yobea Rulon Kogyo Kk | Magnetic tape guide roller |
| JPH01181181U (en) * | 1988-06-13 | 1989-12-27 | ||
| JPH04189116A (en) * | 1990-11-22 | 1992-07-07 | Gogou Kagaku Kk | Gear made of synthetic resin and its manufacture |
| WO1993003484A1 (en) * | 1991-07-31 | 1993-02-18 | Sony Corporation | Tape guide roller for tape cassette and method of making said roller |
| US5454501A (en) * | 1991-07-31 | 1995-10-03 | Sony Corporation | Tape guide roller for tape cassette |
| US5662850A (en) * | 1991-07-31 | 1997-09-02 | Sony Corporation | Method of manufacturing a tape guide roller for tape cassette |
| EP1115115A2 (en) * | 1999-12-06 | 2001-07-11 | Fuji Photo Film Co., Ltd. | Magnetic tape cassette, guide roller, and a method of manufacturing a guide roller |
| EP1115115A3 (en) * | 1999-12-06 | 2007-10-24 | FUJIFILM Corporation | Magnetic tape cassette, guide roller, and a method of manufacturing a guide roller |
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