JPS6233155Y2 - - Google Patents
Info
- Publication number
- JPS6233155Y2 JPS6233155Y2 JP15143781U JP15143781U JPS6233155Y2 JP S6233155 Y2 JPS6233155 Y2 JP S6233155Y2 JP 15143781 U JP15143781 U JP 15143781U JP 15143781 U JP15143781 U JP 15143781U JP S6233155 Y2 JPS6233155 Y2 JP S6233155Y2
- Authority
- JP
- Japan
- Prior art keywords
- elastic ring
- flywheel
- capstan
- drive device
- attached
- 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
- 238000005096 rolling process Methods 0.000 claims description 2
- 239000000853 adhesive Substances 0.000 description 11
- 230000001070 adhesive effect Effects 0.000 description 11
- 229920001971 elastomer Polymers 0.000 description 9
- 239000005060 rubber Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 229920003002 synthetic resin Polymers 0.000 description 5
- 239000000057 synthetic resin Substances 0.000 description 5
- 230000005540 biological transmission Effects 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229920003051 synthetic elastomer Polymers 0.000 description 2
- 239000005061 synthetic rubber Substances 0.000 description 2
- 238000004073 vulcanization Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
Landscapes
- Pulleys (AREA)
Description
【考案の詳細な説明】
本考案はテープレコーダ等に用いられるキヤプ
スタン駆動装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a capstan drive device used in tape recorders and the like.
テープレコーダにおけるキヤプスタン駆動装置
として例えば第１図の縦断面図に示すものが知ら
れている。第１図で、キヤプスタン軸１には金属
性のフライホイル２が嵌合され、その外周部に形
成されたテーパー部３に金属系及び合成樹脂系の
接着材４が塗布されてその上に弾性輪５が後述す
るゴム焼付方式の工程を経て取付けられる。そし
てモータ６の回転軸に取付けられた伝達輪または
駆動輪７が弾性輪５の周面を転接することによ
り、モータ６の回転駆動力がキヤプスタン１に伝
達されるように成されている。 2. Description of the Related Art As a capstan drive device for a tape recorder, for example, the device shown in the vertical cross-sectional view of FIG. 1 is known. In FIG. 1, a metal flywheel 2 is fitted onto a capstan shaft 1, and a metal and synthetic resin adhesive 4 is applied to a tapered portion 3 formed on the outer periphery of the flywheel. The ring 5 is attached through a rubber baking process which will be described later. A transmission wheel or drive wheel 7 attached to the rotating shaft of the motor 6 rolls on the circumferential surface of the elastic ring 5, so that the rotational driving force of the motor 6 is transmitted to the capstan 1.
さて、ゴム焼付方式による弾性輪５の形成過程
においては、まずフライホイール２の表面を洗浄
した後、フライホイール２のテーパー部３に金属
系及び合成樹脂系の接着剤を塗布し、その後、未
加硫の合成ゴムを載せてフライホイール２全体を
成型金型内に配設し、適宜の圧力を加えて合成ゴ
ムを200〜300℃程度で熱加硫し、その後に研摩仕
上げしてゴム製の弾性輪５をフライホイール２の
底面に被着形成するようにしている。 Now, in the process of forming the elastic ring 5 using the rubber baking method, first, the surface of the flywheel 2 is cleaned, and then metal and synthetic resin adhesives are applied to the tapered part 3 of the flywheel 2. Place the entire flywheel 2 in a mold with vulcanized synthetic rubber placed on it, apply appropriate pressure, heat vulcanize the synthetic rubber at about 200 to 300°C, and then polish and finish it to make it into a rubber product. An elastic ring 5 is formed on the bottom surface of the flywheel 2.
このように、従来では弾性輪５の被着形成工程
が非常に複雑であることに加え、被着形成の際に
使用した接着剤の影響によつて弾性輪５に硬度む
らが生じたり、弾性輪内部で気泡が発生したり、
更には硬化した接着剤の厚さむらが発生するの
で、品質が一定の弾性輪５を形成することができ
ず、また上述の諸々の原因に基づき振動及びワ
ウ・フラツタが発生してしまう。 As described above, in addition to the conventional process of forming the elastic ring 5 to be adhered to it, which is very complicated, the elastic ring 5 may have uneven hardness or elasticity due to the influence of the adhesive used in forming the adherend. Air bubbles may form inside the ring,
Furthermore, since the thickness of the cured adhesive is uneven, it is not possible to form an elastic ring 5 of constant quality, and vibrations and wow and flutter occur due to the various causes mentioned above.
又、軽量化を図るために合成樹脂製のフライホ
イールを使用する場合ではゴムを常温で加硫させ
る必要があるから加硫不足となり、十分な弾性が
得られないという欠点があつた。 Furthermore, when a flywheel made of synthetic resin is used to reduce weight, the rubber must be vulcanized at room temperature, resulting in insufficient vulcanization and a disadvantage in that sufficient elasticity cannot be obtained.
かかる点にかんがみ、本考案は簡単な構成によ
つて上述の種々の欠点を除去し、キヤプスタンの
底面に弾性輪を容易に嵌着でき、しかもワウ・フ
ラツタが発生しないようにした新規なキヤプスタ
ン駆動装置を提供せんとするものである。 In view of these points, the present invention is a novel capstan drive which eliminates the various drawbacks mentioned above with a simple structure, allows an elastic ring to be easily fitted to the bottom of the capstan, and prevents wow and flutter from occurring. The aim is to provide the equipment.
以下本考案の実施例を図面に従つて説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第２図は本考案によるキヤプスタン駆動装置の
縦断面図である。なお第２図では第１図と同じ部
分には同一の符号が付されている。第２図に示す
実施例では、弾性輪５がフライホイル２の下面８
に装着され、弾性輪５に伝達輪または駆動輪７が
転接されるように成されている。そして、弾性輪
５がフライホイル２に密着して取付けられるよう
に、弾性輪５が装着されるフライホイル２の周面
９は、下面８に向かつて外径が次第に小さくなる
ようなテーパー面となつている。 FIG. 2 is a longitudinal sectional view of the capstan driving device according to the present invention. In FIG. 2, the same parts as in FIG. 1 are given the same reference numerals. In the embodiment shown in FIG.
The transmission wheel or the drive wheel 7 is attached to the elastic ring 5 so that the transmission wheel or the drive wheel 7 is in rotational contact with the elastic ring 5. The circumferential surface 9 of the flywheel 2 to which the elastic ring 5 is attached is formed into a tapered surface whose outer diameter gradually decreases toward the lower surface 8 so that the elastic ring 5 is attached closely to the flywheel 2. It's summery.
このテーパー面の機能を第３図を参照して説明
すると、弾性輪５は第３図に示すように円筒状ゴ
ムチユーブをその軸と直角な切断面で輪切りにし
た様な形状に作られている。この弾性輪５の内径
は、フライホイル２の周面９の平均外径よりも３
〜10％程度小さく形成され、装着状態で弾性輪５
がフライホイル周面９を締め付けるようになつて
いる。周面９がテーパー角度θを有していること
により、弾性輪５は、フライホイル２に装着され
たとき、第３図の点線のように変形しようとす
る。このため弾性輪５には第３図の矢印Ａ方向の
内部応力が生じ、これによつてフライホイル２の
下面８に弾性輪５が強く押圧されて密着する。こ
の結果、接着材を用いなくても、弾性輪５がフラ
イホイル２から外れることが防止される。特に、
弾性輪５を形成するゴム材がクリープ特性を持つ
ていても、上記テーパー面が設けられているか
ら、弾性輪５の自己保持力は保存される。 The function of this tapered surface will be explained with reference to Fig. 3.As shown in Fig. 3, the elastic ring 5 is made in a shape similar to that of a cylindrical rubber tube cut into rings with a cut plane perpendicular to its axis. . The inner diameter of this elastic ring 5 is 33% larger than the average outer diameter of the circumferential surface 9 of the flywheel 2.
~10% smaller, elastic ring 5 when attached
is adapted to tighten the flywheel circumferential surface 9. Since the circumferential surface 9 has a taper angle θ, the elastic ring 5 tends to deform as shown by the dotted line in FIG. 3 when attached to the flywheel 2. For this reason, an internal stress is generated in the elastic ring 5 in the direction of arrow A in FIG. 3, and as a result, the elastic ring 5 is strongly pressed against the lower surface 8 of the flywheel 2 and comes into close contact with it. As a result, the elastic ring 5 is prevented from coming off the flywheel 2 even without using adhesive. especially,
Even if the rubber material forming the elastic ring 5 has creep characteristics, the self-retention force of the elastic ring 5 is preserved because the tapered surface is provided.
第４図は本考案を適用したテープレコーダ及び
従来のテープレコーダのワウ・フラツタの特性分
布図である。本実施例のキヤプスタン駆動装置で
は、接着材を使用しなくても、弾性輪５をフライ
ホイル２に強固に取付けることができるから、接
着材による弾性輪５の強度むら、接着材の厚さむ
ら或いは弾性輪内部での気泡の発生が無く、第４
図に示すようにワウ・フラツタを0.08％程度（従
来）から0.02％程度に低減できる。 FIG. 4 is a characteristic distribution diagram of wow and flutter in a tape recorder to which the present invention is applied and a conventional tape recorder. In the capstan drive device of this embodiment, the elastic ring 5 can be firmly attached to the flywheel 2 without using an adhesive, so that uneven strength of the elastic ring 5 due to the adhesive and uneven thickness of the adhesive can be prevented. Or, there is no generation of air bubbles inside the elastic ring, and the fourth
As shown in the figure, wow and flutter can be reduced from about 0.08% (conventional) to about 0.02%.
次に第５図〜第７図は夫々本考案によるキヤプ
スタン駆動装置の変形例を示している。第５図で
は、弾性輪の外れ防止のためにフライホイル２の
端部にフランジ部１０を設けている。第６図で
は、同じく弾性輪５の外れ防止のためと弾性輪の
装着時のなじみを良くするためにフライホイル２
の周面９に凹溝１１を形成している。また第７図
では、フライホイル２の下面８にその外周部から
内周部にかけて勾配を付けて周面９のテーパーと
同様な効果を得ている。 Next, FIGS. 5 to 7 show modified examples of the capstan drive device according to the present invention. In FIG. 5, a flange portion 10 is provided at the end of the flywheel 2 to prevent the elastic ring from coming off. In FIG. 6, the flywheel 2 is also used to prevent the elastic ring 5 from coming off and to improve the fit when the elastic ring is installed.
A concave groove 11 is formed in the circumferential surface 9 of. Further, in FIG. 7, the lower surface 8 of the flywheel 2 is sloped from the outer circumference to the inner circumference to obtain the same effect as the taper of the circumferential surface 9.
なお上述の各実施例では、弾性輪５は、ゴムチ
ユーブをその軸と直角な平行断面で輪切りにした
平ワツシヤー状に形成されているが、モータ６に
取付けられた駆動輪７（第２図）が転接する弾性
輪５の周辺部に駆動輪７の円錐面と合致する傾斜
面を付けてもよい。 In each of the above-described embodiments, the elastic ring 5 is formed into a flat washer shape obtained by cutting a rubber tube into rings with a parallel section perpendicular to its axis. An inclined surface that coincides with the conical surface of the drive wheel 7 may be provided on the peripheral portion of the elastic ring 5 where the elastic ring 5 makes rolling contact.
なお弾性輪５の側のフライホイル２と対接する
面（弾性輪の嵌入孔内面または平端面）にテーパ
ー面を設けることも考えられるが、この場合ゴム
の加工工数が大巾に増大する上、テーパー面の加
工精度が悪く、また弾性輪を製造するための金
型、特殊治具等のコストが高くなる問題がある。 It is also conceivable to provide a tapered surface on the surface of the elastic ring 5 that is in contact with the flywheel 2 (the inner surface of the insertion hole or the flat end surface of the elastic ring), but in this case, the number of man-hours for processing the rubber increases considerably, and There are problems in that the machining accuracy of the tapered surface is poor and the cost of molds, special jigs, etc. for manufacturing the elastic ring is high.
本考案のキヤプスタン駆動装置によれば、弾性
輪の取付工数を大巾に削減できて、僅かな時間で
確実に、しかも均一に弾性輪をフライホイルに取
付けることができる。また接着材を用いないで
も、弾性輪をフライホイルに対して強固に取付け
ることができるから、接着材による弾性輪の強度
むら、弾性輪内部における気泡の発生或いは接着
材の厚さむら等が生ずることがなく、駆動力の伝
達が安定に行われ、ワウ・フラツタを大巾に低減
できる。またフライホイルの弾性輪装着面に上述
のようなテーパー部を設けることにより、弾性輪
がフライホイルの装着面に確実に密着固定される
ので、使用中において弾性輪の外周部がフライホ
イルから浮き上がつたり、或いは弾性輪がフライ
ホイルから外れたりすることが全く無い。 According to the capstan drive device of the present invention, the number of man-hours for attaching the elastic ring can be greatly reduced, and the elastic ring can be reliably and uniformly attached to the flywheel in a short amount of time. In addition, since the elastic ring can be firmly attached to the flywheel without using adhesive, uneven strength of the elastic ring due to the adhesive, generation of air bubbles inside the elastic ring, uneven thickness of the adhesive, etc. may occur. The driving force is transmitted stably, and wow and flutter can be greatly reduced. In addition, by providing the above-mentioned tapered part on the elastic ring mounting surface of the flywheel, the elastic ring is securely fixed to the flywheel mounting surface, so that the outer periphery of the elastic ring does not float away from the flywheel during use. There is no chance of the elastic ring falling off or coming off the flywheel.
なお本考案によれば、フライホイルを合成樹脂
または金属粉末を混入した合成樹脂等で構成する
ことができ、従来のゴム焼付け方式で生ずる加硫
温度の問題を回避することができる。 According to the present invention, the flywheel can be made of a synthetic resin or a synthetic resin mixed with metal powder, and the problem of vulcanization temperature that occurs in the conventional rubber baking method can be avoided.
第１図は従来のキヤプスタン駆動装置を示す縦
断面図、第２図は本考案によるキヤプスタン駆動
装置の一例を示す縦断面図、第３図は第２図の組
立図、第４図は本考案を用いたテープレコーダの
ワウ・フラツタの従来との対比を示す特性分布
図、第５図〜第７図は夫々本考案の変形例を示す
キヤプスタン駆動装置の縦断面図である。
なお図面に用いられている符号において、１…
…キヤプスタン軸、２……フライホイル、５……
弾性輪、６……モータ、７……伝達輪、８……下
面、９……周面、である。
Fig. 1 is a longitudinal sectional view showing a conventional capstan drive device, Fig. 2 is a longitudinal sectional view showing an example of the capstan drive device according to the present invention, Fig. 3 is an assembled view of Fig. 2, and Fig. 4 is a longitudinal sectional view showing an example of the capstan drive device according to the present invention. 5 to 7 are longitudinal cross-sectional views of a capstan drive device showing modifications of the present invention, respectively. In addition, in the symbols used in the drawings, 1...
...Capstan shaft, 2...Flywheel, 5...
Elastic ring, 6...Motor, 7...Transmission wheel, 8...Bottom surface, 9...Surrounding surface.
Claims (1)
このフライホイルに弾性輪が嵌入され、この弾性
輪に駆動輪が転接されるようにしたキヤプスタン
駆動装置において、上記フライホイルの弾性輪装
着面に、上記弾性輪を弾性変形させて上記フライ
ホイルに密着させ得るテーパー部を設けたことを
特徴とするキヤプスタン駆動装置。 A flywheel is attached to the capstan shaft,
In a capstan drive device in which an elastic ring is fitted into the flywheel and a drive wheel is in rolling contact with the elastic ring, the elastic ring is elastically deformed on the elastic ring mounting surface of the flywheel, and the flywheel is attached to the flywheel. A capstan drive device characterized by having a tapered portion that can be brought into close contact with the capstan drive device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15143781U JPS5856245U (en) | 1981-10-12 | 1981-10-12 | capstan drive |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15143781U JPS5856245U (en) | 1981-10-12 | 1981-10-12 | capstan drive |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5856245U JPS5856245U (en) | 1983-04-16 |
| JPS6233155Y2 true JPS6233155Y2 (en) | 1987-08-25 |
Family
ID=29944125
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15143781U Granted JPS5856245U (en) | 1981-10-12 | 1981-10-12 | capstan drive |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5856245U (en) |
-
1981
- 1981-10-12 JP JP15143781U patent/JPS5856245U/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5856245U (en) | 1983-04-16 |
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