JPH0535246Y2 - - Google Patents
Info
- Publication number
- JPH0535246Y2 JPH0535246Y2 JP1987088347U JP8834787U JPH0535246Y2 JP H0535246 Y2 JPH0535246 Y2 JP H0535246Y2 JP 1987088347 U JP1987088347 U JP 1987088347U JP 8834787 U JP8834787 U JP 8834787U JP H0535246 Y2 JPH0535246 Y2 JP H0535246Y2
- Authority
- JP
- Japan
- Prior art keywords
- recess
- oil seal
- inner circumferential
- circumferential surface
- crankshaft
- 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 - Lifetime
Links
- 238000002485 combustion reaction Methods 0.000 claims description 16
- 238000007789 sealing Methods 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 239000000428 dust Substances 0.000 description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 239000000498 cooling water Substances 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
Landscapes
- Sealing With Elastic Sealing Lips (AREA)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
本考案は、内燃機関におけるクランク軸の一端
部を、内燃機関の側面に取付くカバーを貫通して
突出し、且つ、この突出部にプーリ等の輪体を取
付けた部分に対する軸封装置に関するものであ
る。[Detailed description of the invention] [Industrial application field] The present invention projects one end of the crankshaft of an internal combustion engine through a cover attached to the side of the internal combustion engine, and a pulley or the like is attached to this projection. The present invention relates to a shaft sealing device for a portion where a wheel body is attached.
一般に、内燃機関におけるクランク軸の一端部
は、内燃機関の側面に取付くタイミングギヤーカ
バー又はタイミングベルトカバー等のカバーを貫
通して突出して、この突出部に、冷却水ポンプ又
は発電機等への動力伝達用プーリ等の輪体を嵌着
した構成する一方、前記クランク軸の一端部が前
記カバーを貫通する部分には、オイルシールを嵌
めることにより、当該部分を軸封するようにして
いることは、例えば、実開昭55−90725号公報等
に記載されているように良く知られている。
Generally, one end of the crankshaft of an internal combustion engine protrudes through a cover such as a timing gear cover or timing belt cover attached to the side of the internal combustion engine, and this protruding part is connected to a cooling water pump, a generator, etc. While a wheel body such as a power transmission pulley is fitted, an oil seal is fitted to the part where one end of the crankshaft passes through the cover to seal that part. is well known as described in, for example, Japanese Utility Model Application Publication No. 55-90725.
しかし、このものは、内燃機関に取付くカバー
と、クランク軸の一端部に嵌着した輪体との間の
隙間から、ダスト及び泥水等がオイルシールの部
分まで侵入して、オイルシールのうち回転部に対
して摺接する部分の摩耗が促進され、オイルシー
ルによる密封性が早期に低下するのであつた。 However, in this case, dust, muddy water, etc. can enter the oil seal through the gap between the cover attached to the internal combustion engine and the wheel fitted to one end of the crankshaft. Wear of the parts that slide against the rotating parts is accelerated, and the sealing performance of the oil seal deteriorates early.
また、別の先行技術としての実開昭56−30659
号公報や、実開昭61−44025号公報は、オイルシ
ールの環状の外向きリツプ片を半径外向き広がり
状に一体的に造形して、この外向きリツプ片の先
端を、輪体の側面における環状の凹所の内周面の
うち半径外側の内周面に対して接当することを提
案しているが、この凹所の内周面のうち半径外側
の内周面は輪体の回転軸線と平行状であるため、
オイルシールにおける外向きリツプ片の先端の直
径に対して輪体側の凹所のうち外径側の内周面の
直径寸法の製作誤差があると、外向きリツプ片の
輪体に対する接当が強くなつたり弱くなつたりす
るように変化するから、密封性が寸法誤差によつ
て悪化すると言う問題もあつた。 Also, Utility Model Application No. 56-30659 as another prior art
No. 61-44025 discloses that the annular outward lip of the oil seal is integrally shaped with a radius extending outward, and the tip of this outward lip is connected to the side surface of the ring body. It is proposed that the inner circumferential surface of the annular recess be in contact with the inner circumferential surface on the radially outer side of the inner circumferential surface of the annular recess; Because it is parallel to the axis of rotation,
If there is a manufacturing error in the diameter of the inner circumferential surface on the outer diameter side of the recess on the wheel body compared to the diameter of the tip of the outward lip piece in the oil seal, the outer lip piece may come into strong contact with the wheel body. There was also a problem in that the sealing performance deteriorated due to dimensional errors since the material changed as it warped or weakened.
また、前記外向きリツプ片の外周面と前記凹所
の内周面のうち半径外側の内周面とで囲まれた部
位（空間）に侵入したダスト及び泥水は、輪体の
回転による遠心力によつても半径外側に排出する
ことが困難となる。即ち、延伸力を受けて半径外
方向に飛び出そうとする前記空間内のダストや泥
水は、輪体の回転軸線と平行状である前記凹所の
半径外側の内周面にて受け止められる状態とな
り、輪体の半径外側の外部に飛び出し難くなつ
て、凹所内にダスト等が留まり易いという問題が
あつた。 In addition, dust and muddy water that have entered the area (space) surrounded by the outer circumferential surface of the outward lip piece and the inner circumferential surface on the radially outer side of the inner circumferential surface of the recess are removed by the centrifugal force caused by the rotation of the wheel. This also makes it difficult to discharge to the outside of the radius. That is, the dust and muddy water in the space that tends to fly out in the radial direction due to the stretching force is caught by the inner peripheral surface on the radial outside of the recess, which is parallel to the axis of rotation of the wheel. However, there was a problem in that it was difficult for dust to fly out outside the radius of the ring body, and dust and the like were likely to remain in the recess.
さらに、特公昭47−16681号公報では、輪体の
側面における環状の凹所の内周面のうち半径内側
の内周面を凹所の底面に向かつて半径外向きに傾
斜する傾斜テーパ状の内周面に形成し、この傾斜
テーパ状の内周面に対して、オイルシールにおけ
る環状の外向きリツプ片の先端を接当することを
提案しているが、この外向きリツプ片の突出方向
と、前記凹所の内周面のうち半径外側の内周面と
が、輪体の軸線と平行状であることから、前述の
凹所内に侵入したダスト等が当該凹所内に留まり
易いという問題は、やはり解決できないのであつ
た。 Furthermore, in Japanese Patent Publication No. 47-16681, a slanted tapered surface is formed in which the inner circumferential surface of the annular recess on the side surface of the ring body is inclined radially outward so that the inner circumferential surface on the inner radial side faces the bottom surface of the recess. It is proposed that the oil seal be formed on the inner circumferential surface and that the tip of the annular outward lip piece of the oil seal be in contact with this inclined tapered inner circumferential surface. And, since the inner circumferential surface of the inner circumferential surface of the recess is parallel to the axis of the wheel, the problem is that dust, etc. that have entered the recess are likely to remain in the recess. As expected, the problem could not be solved.
本考案は、これらの問題を一挙に解消すること
を目的とするものである。 The present invention aims to solve these problems all at once.
このため本考案は、内燃機関におけるクランク
軸の一端部を、内燃機関の側面に取付くカバーを
貫通して突出させ、この突出部にプーリ等の輪体
を嵌着する一方、前記クランク軸の一端部が前記
カバーを貫通する部分に、オイルシールを嵌めて
成る内燃機関において、前記輪体における前記カ
バー側に対面する側面に、クランク軸と同心円状
に形成した凹所を設け、前記オイルシールに、前
記輪体における凹所内に延びる環状で且つ半径外
広がり状の外向きリツプ片を一体的に設ける一
方、前記輪体における凹所の内周面のうち輪体の
半径外側の内周面を、オイルシール側に向つて外
広がりの傾斜テーパ状に形成して、この傾斜テー
パ状の内周面に、前記オイルシールにおける外向
きリツプ片の先端を接当させる構成にしたもので
ある。
Therefore, in the present invention, one end of the crankshaft of an internal combustion engine is made to protrude through a cover attached to the side surface of the internal combustion engine, and a wheel such as a pulley is fitted into this protrusion, while the crankshaft is In an internal combustion engine in which an oil seal is fitted in a portion of which one end passes through the cover, a recess formed concentrically with the crankshaft is provided on the side surface of the wheel body facing the cover, and the oil seal is integrally provided with an annular outward-facing lip extending into the recess in the ring body and extending outward from the radius; is formed into an inclined taper shape expanding outward toward the oil seal, and the tip of the outward lip of the oil seal is brought into contact with the inner circumferential surface of this inclined taper shape.
このように、輪体の側面にクランク軸と同心円
状に形成した凹所を設けて、この凹所内に向かつ
てオイルシールに一体的に造形した外向きリツプ
片を突出したことにより、輪体と、オイルシール
における外向きリツプ片とを、クランク軸の軸線
方向に沿つてオーバーラツプすることができるか
ら、オイルシールに外向きリツプ片を設けたこと
によるクランク軸の軸線方向に沿つての寸法の増
加を回避することができる。
In this way, a recess formed concentrically with the crankshaft is provided on the side surface of the wheel body, and an outward lip piece integrally formed with the oil seal is protruded into the recess. Since the outward lip piece of the oil seal can be overlapped along the axial direction of the crankshaft, the dimension in the crankshaft axial direction is increased by providing the outward lip piece on the oil seal. can be avoided.
しかも、前記輪体の凹所における内周面のうち
半径外側の内周面を、オイルシール側に向つて外
広がりの傾斜テーパ状に形成して、この傾斜テー
パ状の内周面に、前記オイルシールにおける半径
外広がり状の外向きリツプ片の先端を接当したこ
とにより、該外向きリツプ片の外周面と前記凹所
における内周面のうち半径外側の内周面とで囲ま
れる空間が輪体の側面に対して外向きに大きく広
がるように形成されることになり、オイルシール
側に侵入したダスト等は、輪体の回転による遠心
力を受けたとき、前記傾斜テーパ状の内周面に沿
つて外側に飛散・排除され易くなり、当該傾斜テ
ーパ状内周面のうちこれに対して前記外向きリツ
プ片が接当する部分に、ダスト等が溜ることがな
いから、ダスト等による前記外向きリツプ片の摩
耗を確実に低減できるのである。 Moreover, the radially outer inner circumferential surface of the inner circumferential surface of the recess of the ring body is formed into an inclined taper shape that expands outward toward the oil seal side, and the inclined tapered inner circumferential surface has the above-mentioned inner circumferential surface. The space surrounded by the outer circumferential surface of the outward lip piece and the inner circumferential surface of the inner circumferential surface of the recess, which is radially outward, by abutting the tip of the outward lip piece of the oil seal that extends outward from the radius. The oil seal is formed so that it widely spreads outward from the side surface of the wheel, and dust, etc. that has entered the oil seal side will be destroyed by the inside of the inclined taper when subjected to centrifugal force due to the rotation of the wheel. Dust and the like are easily scattered and removed to the outside along the circumferential surface, and dust and the like do not accumulate on the portion of the inclined tapered inner circumferential surface where the outward lip piece comes into contact with the inner circumferential surface. This makes it possible to reliably reduce the wear of the outward lip piece due to
その上、オイルシールにおける半径外広がり状
に形成した外向きリツプの先端を、凹所における
前記傾斜テーパ状の内周面に接当したことによ
り、オイルシールにおける外向きリツプ片の先端
を凹所の底方向に押し込むように、輪体をオイル
シール側に接近させるにつれて、密封性を高める
ことができ、リツプ片の先端の摩耗によりその直
径寸法が減少しても、輪体をオイルシール側に接
近させるようにセツトしなおせば、密封性を回復
でき、軸封装置の耐久性を向上させることができ
る。 Furthermore, the tip of the outward lip of the oil seal, which is formed in a shape extending outward from the radius, is brought into contact with the inclined tapered inner circumferential surface of the recess, so that the tip of the outward lip of the oil seal is placed in the recess. The sealing performance can be improved as the wheel gets closer to the oil seal side by pushing it toward the bottom of the lip. By resetting them so that they are close to each other, the sealing performance can be restored and the durability of the shaft sealing device can be improved.
従つて、本考案によると、クランク軸が突出す
る部分における大型化を招来することなく、高い
軸封の効果とオイルシールの耐久性とを、大幅に
向上できる効果を有する。
Therefore, according to the present invention, it is possible to significantly improve the shaft sealing effect and the durability of the oil seal without increasing the size of the portion from which the crankshaft projects.
以下、本考案の実施例を図面について説明する
に、図において符号１は、内燃機関を、符号２
は、前記内燃機関１におけるクランク軸を、符号
３は、前記クランク軸２上に嵌着したタイミグギ
ヤーを、そして、符号４は、前記内燃機関１の側
面に前記タイミングギヤー３を覆うように取付く
タイミングギヤーカバーを各々示す。
Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 indicates an internal combustion engine, and reference numeral 2
3 is a crankshaft of the internal combustion engine 1, 3 is a timing gear fitted on the crankshaft 2, and 4 is attached to a side surface of the internal combustion engine 1 so as to cover the timing gear 3. Each timing gear cover is shown.
前記クランク軸２の一端部２ａは、前記タイミ
ングギヤーカバー４を貫通して突出し、この一端
部２ａには、冷却水ポンプ又は発電機（いずれも
図示せず）等への動力伝達用のプーリ５が嵌着さ
れ、且つ、当該一端部２ａが、前記タイミングギ
ヤーカバー４を貫通する部分には、耐油ゴム製の
オイルシール６が嵌められている。 One end 2a of the crankshaft 2 protrudes through the timing gear cover 4, and a pulley 5 for transmitting power to a cooling water pump or a generator (none of which is shown) is attached to the one end 2a. An oil seal 6 made of oil-resistant rubber is fitted in a portion where the timing gear cover 4 is fitted and one end portion 2a thereof passes through the timing gear cover 4.
そして、前記クランク軸２上のプーリ５には、
前記オイルシール６に面する側面に、前記クラン
ク軸２と同心円状の凹所７を凹み形成する一方、
前記オイルシール６には、前記プーリ５に面する
側面に前記凹所７内に向つて延びる環状であつ
て、半径外向き広がり状の外向きリツプ片８を一
体的に造形する。即ち外向きリツプ片８の先端側
の直径が基端側の直径より大きくなるように形成
する。 And, on the pulley 5 on the crankshaft 2,
a recess 7 concentric with the crankshaft 2 is formed on the side surface facing the oil seal 6;
The oil seal 6 is integrally formed with an annular outward lip piece 8 extending toward the inside of the recess 7 on the side surface facing the pulley 5 and expanding radially outward. That is, the outer lip piece 8 is formed so that the diameter on the distal side is larger than the diameter on the proximal side.
また、前記プーリ５における凹所７の内周面の
うち半径外側の内周面７ａを、クランク軸２の軸
線と平行にすることなくオイルシール６側に向つ
て外広がりに適宜角度（θ）だけ傾斜するテーパ
状に形成して、この傾斜テーパ状の内周面７ａ
に、前記オイルシール６における外向きリツプ片
８の先端を接当した構成にする。 Also, the inner circumferential surface 7a on the radially outer side of the inner circumferential surface of the recess 7 in the pulley 5 is not made parallel to the axis of the crankshaft 2, but is expanded outward toward the oil seal 6 at an appropriate angle (θ). This inclined tapered inner circumferential surface 7a is formed into a tapered shape that is inclined by
The tip of the outward lip piece 8 of the oil seal 6 is brought into contact with the oil seal 6.
このようにオイルシール６に一体的に造形した
外向きリツプ片８の先端を、プーリ５における凹
所７の内周面のうち半径外側の内周面７ａに接当
したことにより、ダスト及び泥水等がタイミング
ギヤーカバー４とプーリ６との間の隙間からオイ
ルシール６に向かつて侵入するのを低減すること
ができる。 By abutting the tip of the outward lip piece 8 integrally formed on the oil seal 6 with the radially outer inner circumferential surface 7a of the inner circumferential surface of the recess 7 in the pulley 5, dust and muddy water can be removed. etc. can be prevented from entering the oil seal 6 through the gap between the timing gear cover 4 and the pulley 6.
しかし、この場合において、前記凹所７のうち
半径外側の内周面７ａが、第３図に示すようにク
ランク軸２の軸線と平行であると、一旦、凹所７
内に侵入してしまつたダスト等は、プーリ５の回
転による遠心力を受けても、当該凹所７内から出
ることはなく、凹所７内にいつまでも溜つた状態
になる。 However, in this case, if the radially outer inner peripheral surface 7a of the recess 7 is parallel to the axis of the crankshaft 2 as shown in FIG.
Dust and the like that have entered the inside will not come out of the recess 7 even if subjected to centrifugal force due to the rotation of the pulley 5, and will remain in the recess 7 forever.
これに対して、本考案のように凹所７の内周面
のうち半径外側の内周面７ａを、前記のようにオ
イルシール６側に向つて外広がりに適宜角度
（θ）だけ傾斜するテーパ状に形成した場合には、
凹所７内にダスト等が侵入しても、このダスト等
は、プーリ５の回転による遠心力を受けて、前記
傾斜テーパ状の内周面７ａに沿つて、外側に飛散
するように除去されるし、且つ該外向きリツプ片
８の外周面と前記凹所７における内周面のうち半
径外側の内周面７ａとで囲まれる空間がプーリ５
の側面に対して外向きに大きく広がるように形成
されることになり、この空間内に侵入したダスト
等は、プーリ５の回転による遠心力を受けたと
き、前記傾斜テーバ状の内周面７ａに沿つて外側
に飛散・排除され易くなり、ダスト等が凹所７内
にいつまでも溜つた状態になることを確実に防止
できるのである。 On the other hand, in the present invention, the inner circumferential surface 7a on the radially outer side of the inner circumferential surface of the recess 7 is inclined by an appropriate angle (θ) to expand outward toward the oil seal 6 side as described above. When formed into a tapered shape,
Even if dust or the like enters the recess 7, the dust or the like is removed by being scattered outward along the tapered inner circumferential surface 7a due to the centrifugal force caused by the rotation of the pulley 5. The space surrounded by the outer circumferential surface of the outward lip piece 8 and the inner circumferential surface 7a on the radially outer side of the inner circumferential surface of the recess 7 is the space surrounded by the pulley 5.
When the dust and the like that have entered this space are subjected to centrifugal force due to the rotation of the pulley 5, the inner circumferential surface 7a of the inclined tapered shape This makes it easier for dust to be scattered and removed to the outside along the lines, and it is possible to reliably prevent dust from remaining in the recess 7 forever.
第１図は本考案の実施例を示す縦断正面図、第
２図は第１図の要部拡大図、第３図は本考案に至
る以前を示す図である。
１……内燃機関、２……クランク軸、３……タ
イミングギヤー、４……タイミングギヤーカバ
ー、５……プーリ、６……オイルシール、７……
凹所、７ａ……内周面、８……外向きリツプ片。
FIG. 1 is a longitudinal sectional front view showing an embodiment of the present invention, FIG. 2 is an enlarged view of the main part of FIG. 1, and FIG. 3 is a diagram showing the state before the present invention. 1... Internal combustion engine, 2... Crankshaft, 3... Timing gear, 4... Timing gear cover, 5... Pulley, 6... Oil seal, 7...
Recess, 7a...Inner peripheral surface, 8...Outward lip piece.
Claims (1)
機関の側面に取付くカバーを貫通して突出させ、
この突出部にプーリ等の輪体を嵌着する一方、前
記クランク軸の一端部が前記カバーを貫通する部
分に、オイルシールを嵌めて成る内燃機関におい
て、前記輪体における前記カバー側に対面する側
面に、クランク軸と同心円状に形成した凹所を設
け、前記オイルシールに、前記輪体における凹所
内に延びる環状で且つ半径外広がり状の外向きリ
ツプ片を一体的に設ける一方、前記輪体における
凹所の内周面のうち輪体の半径外側の内周面を、
オイルシール側に向つて外広がりの傾斜テーパ状
に形成して、この傾斜テーパ状の内周面に、前記
オイルシールにおける外向きリツプ片の先端を接
当したことを特徴とする内燃機関用クランク軸の
軸封装置。 One end of the crankshaft of the internal combustion engine is made to protrude through a cover attached to the side of the internal combustion engine,
In an internal combustion engine, a wheel body such as a pulley is fitted to this protrusion, and an oil seal is fitted to a portion where one end of the crankshaft passes through the cover, so that the ring body faces the cover side. A recess formed concentrically with the crankshaft is provided on the side surface, and an annular outward lip piece extending into the recess in the wheel body is integrally provided. Among the inner circumferential surfaces of the recess in the body, the inner circumferential surface on the outside of the radius of the ring body,
A crank for an internal combustion engine, characterized in that it is formed into an inclined taper shape that widens outward toward the oil seal side, and the tip of the outward lip piece of the oil seal is in contact with the inclined tapered inner peripheral surface. Shaft sealing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987088347U JPH0535246Y2 (en) | 1987-06-08 | 1987-06-08 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987088347U JPH0535246Y2 (en) | 1987-06-08 | 1987-06-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63196867U JPS63196867U (en) | 1988-12-19 |
| JPH0535246Y2 true JPH0535246Y2 (en) | 1993-09-07 |
Family
ID=30946379
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987088347U Expired - Lifetime JPH0535246Y2 (en) | 1987-06-08 | 1987-06-08 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0535246Y2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009257485A (en) | 2008-04-17 | 2009-11-05 | Nok Corp | Sealing device |
| JP2013170685A (en) * | 2012-02-23 | 2013-09-02 | Kubota Corp | Sealing device for transmission case of engine |
| JP5802572B2 (en) * | 2012-02-23 | 2015-10-28 | 株式会社クボタ | Engine transmission case sealing device |
| WO2016027696A1 (en) * | 2014-08-20 | 2016-02-25 | Nok株式会社 | Sealing structure |
| EP3222893B1 (en) * | 2014-12-04 | 2019-10-16 | Nok Corporation | Sealing structure with torsional damper and oil seal |
| EP3242054B1 (en) * | 2015-01-07 | 2022-03-30 | Nok Corporation | Sealing structure with torsional damper and oil seal |
| CN109073092B (en) * | 2016-04-27 | 2019-11-12 | Nok株式会社 | Use the sealing structure of damper and oil sealing |
| JP7221822B2 (en) * | 2019-07-17 | 2023-02-14 | トヨタ自動車株式会社 | Engine seal structure |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5630659B2 (en) * | 1973-03-13 | 1981-07-16 | ||
| JPS5755580U (en) * | 1980-09-13 | 1982-04-01 | ||
| JPS6144025B2 (en) * | 1982-02-27 | 1986-10-01 | Matsushita Electric Works Ltd |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5630659U (en) * | 1979-08-16 | 1981-03-25 | ||
| JPS6144025U (en) * | 1984-08-27 | 1986-03-24 | エヌオーケー株式会社 | Sealing device for rolling bearings |
-
1987
- 1987-06-08 JP JP1987088347U patent/JPH0535246Y2/ja not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5630659B2 (en) * | 1973-03-13 | 1981-07-16 | ||
| JPS5755580U (en) * | 1980-09-13 | 1982-04-01 | ||
| JPS6144025B2 (en) * | 1982-02-27 | 1986-10-01 | Matsushita Electric Works Ltd |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63196867U (en) | 1988-12-19 |
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