JPH0115731B2 - - Google Patents
Info
- Publication number
- JPH0115731B2 JPH0115731B2 JP56071989A JP7198981A JPH0115731B2 JP H0115731 B2 JPH0115731 B2 JP H0115731B2 JP 56071989 A JP56071989 A JP 56071989A JP 7198981 A JP7198981 A JP 7198981A JP H0115731 B2 JPH0115731 B2 JP H0115731B2
- Authority
- JP
- Japan
- Prior art keywords
- pad
- pads
- disk plate
- pad holder
- plate
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D55/00—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes
- F16D55/02—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members
- F16D55/22—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads
- F16D55/224—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members
- F16D55/225—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads
- F16D55/2255—Brakes with substantially-radial braking surfaces pressed together in axial direction, e.g. disc brakes with axially-movable discs or pads pressed against axially-located rotating members by clamping an axially-located rotating disc between movable braking members, e.g. movable brake discs or brake pads with a common actuating member for the braking members the braking members being brake pads in which the common actuating member is pivoted
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62L—BRAKES SPECIALLY ADAPTED FOR CYCLES
- B62L1/00—Brakes; Arrangements thereof
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Braking Arrangements (AREA)
Description
【発明の詳細な説明】
本発明はデイスクブレーキ装置、特にパツド保
持体をカム機構によつてデイスク板をはさむよう
に駆動すると共に、上記パツド保持体をデイスク
板に沿つて回動せしめ、このパツド保持体にさら
に大きなデイスク板方向の力を与えるようにガイ
ドするようにしたデイスクブレーキ装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention provides a disc brake device, in particular a pad holder that is driven by a cam mechanism so as to sandwich a disc plate, and also rotates the pad holder along the disc plate so that the pad holder can be rotated along the disc plate. This invention relates to a disc brake device that guides a holder to apply a larger force in the direction of the disc plate.
従来、デイスクブレーキ装置は、回動自在なカ
ム部のカム面からの力をピン又は鋼球を介して摩
擦パツド側に伝達して、この摩擦パツドをデイス
ク板に押圧するタイプのものが公知である。 Conventionally, disc brake devices have been known to transmit force from the cam surface of a rotatable cam portion to the friction pad side via a pin or steel ball to press the friction pad against the disc plate. be.
更に、カム機構にかえて、例えば、実開昭55−
49167号の円板ブレーキにおいては、横断面が楔
状の駆動部を対向する可動部材間にレバーで押し
込める構成が開示されている。 Furthermore, instead of using a cam mechanism, for example,
No. 49167 discloses a disc brake in which a drive portion having a wedge-shaped cross section is pushed between opposing movable members using a lever.
しかし、カム機構を用いる場合も、楔状の駆動
部を用いる場合も、いづれもその駆動部分はブレ
ーキレバーの操作力に略比例した力が制動加圧力
としてデイスク板に働くので、握力の弱い人や幼
児などでは十分な制動を行えない欠点がある。 However, regardless of whether a cam mechanism is used or a wedge-shaped drive part is used, the drive part applies a force approximately proportional to the operating force of the brake lever to the disc plate as braking force, so it is difficult for people with weak grip strength to There is a drawback that sufficient braking cannot be achieved in children such as young children.
この発明は上記事情に鑑みて創案されたもの
で、その主たる課題は、ブレーキレバーでパツド
をデイスク板に圧接させその摩擦により車輪の回
転力をパツド保持体を変位しテーパ面に沿つてパ
ツド間隔を狭める力に変換して制動加圧力を増大
させるにある。 This invention was devised in view of the above circumstances, and its main problem is to use the brake lever to press the pads against the disc plate, and use the friction to apply the rotational force of the wheel to displace the pad holder and adjust the pad spacing along the tapered surface. The purpose is to increase the braking force by converting it into a narrowing force.
上記課題を達成するために、この発明は、
(a) 車軸と連動するデイスク板を挟むように対向
する押圧用のパツドを、一端側に有する左右一
対のパツド保持体を設ける、
(b) デイスク板に対してパツド保持体のパツドを
設けた一端側を相互に左右方向でパツドがデイ
スク板を挟圧するよう接近させると共にデイス
ク板の延長方向で対向する他端側を離反する方
向に回転可能とすると共に、前記パツドがデイ
スク板を挟圧した状態でパツド保持体がデイス
ク板の側面に沿つて周方向に回転可能となるよ
う取付ける、
(c) 上記パツド保持体の対向する他端側の間で、
車輪の回転方向と反対の方向に向かつて漸次幅
広となり、上記対向するパツド保持体の他端を
離反方向に押し広げるテーパ面を有するガイド
部材を固定位置に設ける。 In order to achieve the above object, the present invention provides (a) a pair of left and right pad holders each having at one end a pair of pressing pads facing each other so as to sandwich a disc plate interlocking with an axle; (b) a disc plate that is interlocked with an axle; One end side of the pad holding body provided with a pad is brought closer to the plate so that the pads pinch the disk plate in the left-right direction, and the other end side facing each other in the extending direction of the disk plate can be rotated in a direction away from each other. (c) between the opposite ends of the pad holder; in,
A guide member is provided at a fixed position, and has a tapered surface that gradually becomes wider in a direction opposite to the rotational direction of the wheel and that pushes the other ends of the opposing pad holders apart.
(d) ブレーキレバーで操作されて前記パツド保持
体をパツドがデイスク板を挟圧する位置まで回
動変位させるカム機構を設ける、
という技術的手段を講じている。(d) A technical measure is taken in which a cam mechanism is provided which, when operated by a brake lever, rotates and displaces the pad holder to a position where the pad presses the disk plate.
上記構成によつて、ブレーキレバーの操作で該
カム機構によりパツド保持体をパツドがデイスク
板を挟圧する位置まで回動させ、車輪の回転力で
パツド保持体を車輪の回転方向とは逆の方向に回
動しパツド保持体の他端側をテーパ面に沿つて漸
次離反方向に押し広げパツドの加圧力を高めると
いう作用を有している。 With the above configuration, when the brake lever is operated, the pad holder is rotated by the cam mechanism to a position where the pad presses the disk plate, and the rotational force of the wheel is used to move the pad holder in the opposite direction to the rotational direction of the wheel. The other end of the pad holder is gradually expanded in the direction of separation along the tapered surface, thereby increasing the pressing force on the pad.
以下に、この発明の一実施例を図面を参照しつ
つ説明する。 An embodiment of the present invention will be described below with reference to the drawings.
第１図ないし、第４図は、本発明によりデイス
クブレーキ装置の一実施例を示す簡略構成図であ
る。同図に於て１はデイスク板であり、車体フレ
ームによつて保持された車輪側に固定されるもの
でそのデイスク板１を介して対向するパツド３が
パツド保持体４の端部側にネジ５によつて固定さ
れている。上記車体フレーム２には対向片６から
成るブラケツト７がネジ８等の手段により固定さ
れ、この対向片６，６には軸１０が橋絡され、こ
の軸１０の外周側にはブツシユ１２が嵌着され、
このブツシユ１２は固定片１１に形成された孔１
１ａに嵌合されている。上記固定片１１はほぼデ
イスク板１と同一平面上に配置されるもので、こ
の固定片１１の前部側には軸１３が回動自在に取
付けられ、この軸１３の両端側は上記固定片１１
の端部側を挾持する挾持片１４に設けられた孔１
５内に嵌入しており、これにより上記挾持片１４
が突出する保持片１６は軸１３を支点として上下
方向に回動可能となつており、この保持片１６の
両端側にはネジ１７によつてピン１８が固定され
ており、このピン１８は上記パツド保持体４に設
けられた孔１９に嵌入するもので、これによりパ
ツド保持体４はピン１８を支点として下部内面側
がデイスク板１側に近接するか又は離間するよう
な方向に回動することが出来る。すなわちパツド
保持体４はデイスク板１に対し直角方向に回動す
ることが出来ると共にデイスク板１に対し平向方
向すなわちデイスク板１に沿う如く回動すること
が出来る。この場合一方のパツド保持体４にはカ
ム２０を有するレバー２１が軸２２を支点として
回動自在に装着され、上記カム２０のカム面は他
方のパツド保持体４の内面側に当接するもので、
レバー２１を軸２２を支点として回動することに
より、カム２０の回動によつて両パツド保持体４
に対し軸１８を支点とする回動力を与えることが
出来る。尚レバー２１の先端側には図示しないブ
レーキワイヤのインナーワイヤが接続され、アウ
ターワイヤは一方のパツド保持体４の上部側に設
けた保持片２３側に取付けられる。上記パツド保
持体４，４の上部側における対向部分で形成され
る間隙部分にはくさび体２４が突出しており、こ
のくさび体２４は上記固定片１１の上部側に固定
されるもので、ほぼ軸１３を中心とする円の軌跡
にそつて延長するごとく円孤状となつており、そ
の先端側において次第に尖鋭となるごとくその側
面側にテーパー面２５が設けられており、このテ
ーパー面２５にパツド保持体４の上部内面側に突
出する如く設けられ、保持枠２６で保持されたベ
アリング２７が当接している。従つてパツド保持
体４が軸１３を支点としてブラケツト７に近接す
る方向に回動する時はベアリング２７がテーパ面
２５に沿つてスライドするために、このベアリン
グ２７，２７の対向間隙が次第に広がることに相
当し、これにより軸１８を支点としてパツド４４
が回動しその下部側のパツド３，３が次第にデイ
スク板１方向に押圧されることになる。上記パツ
ド保持体４，４の間には、このパツド保持体４，
４のパツド３，３が反対方向に離れる方向の力を
与えるスプリング２９が介挿され、さらにパツド
保持体４に対して、くさび体２４の先端方向に回
動するような力を与えるスプリング３０が接続さ
れている。尚、スプリング３０の一端側はパツド
保持体４，４に取付けたピン３１に接続され、他
端側が固定片１０の下部側に接続されるものであ
る。 1 to 4 are simplified configuration diagrams showing one embodiment of a disc brake device according to the present invention. In the figure, reference numeral 1 denotes a disk plate, which is fixed to the wheel side held by the vehicle body frame, and a pad 3 facing through the disk plate 1 is screwed onto the end side of the pad holder 4. It is fixed by 5. A bracket 7 consisting of opposing pieces 6 is fixed to the vehicle body frame 2 by means such as screws 8, a shaft 10 is bridged between the opposing pieces 6, 6, and a bush 12 is fitted on the outer circumferential side of the shaft 10. worn,
This bush 12 has a hole 1 formed in the fixing piece 11.
1a. The fixing piece 11 is arranged substantially on the same plane as the disk plate 1, and a shaft 13 is rotatably attached to the front side of the fixing piece 11, and both ends of the shaft 13 are connected to the fixing piece 1. 11
A hole 1 provided in a clamping piece 14 that clamps the end side of the
5, and thereby the above-mentioned clamping piece 14
The holding piece 16 that protrudes can be rotated in the vertical direction about the shaft 13, and pins 18 are fixed to both ends of the holding piece 16 with screws 17. The pad holder 4 is fitted into a hole 19 provided in the pad holder 4, so that the pad holder 4 can be rotated about the pin 18 in a direction such that the lower inner surface approaches or moves away from the disk plate 1 side. I can do it. That is, the pad holder 4 can rotate in a direction perpendicular to the disk plate 1 and can also rotate in a direction parallel to the disk plate 1, that is, along the disk plate 1. In this case, a lever 21 having a cam 20 is rotatably mounted on one pad holder 4 about a shaft 22, and the cam surface of the cam 20 abuts the inner surface of the other pad holder 4. ,
By rotating the lever 21 about the shaft 22, both pad holders 4 are rotated by the rotation of the cam 20.
A rotational force can be applied to the shaft 18 with the shaft 18 as a fulcrum. An inner wire of a brake wire (not shown) is connected to the tip end of the lever 21, and an outer wire is attached to a holding piece 23 provided on the upper side of one pad holding body 4. A wedge body 24 protrudes from the gap formed by the opposing upper portions of the pad holders 4, 4, and this wedge body 24 is fixed to the upper side of the fixing piece 11, and is approximately axially It has a circular arc shape extending along the locus of a circle centered at 13, and a tapered surface 25 is provided on the side surface side so that it gradually becomes sharper at the tip side. A bearing 27, which is provided so as to protrude from the upper inner surface of the holding body 4 and is held by a holding frame 26, is in contact therewith. Therefore, when the pad holder 4 rotates about the shaft 13 in a direction approaching the bracket 7, the bearing 27 slides along the tapered surface 25, so that the gap between the bearings 27, 27 gradually widens. This corresponds to the pad 44 with the shaft 18 as the fulcrum.
rotates, and the lower pads 3, 3 are gradually pressed toward the disk plate 1. Between the pad holders 4, 4, this pad holder 4,
A spring 29 is inserted which applies a force in the direction in which the pads 3, 3 of 4 are separated in the opposite direction, and a spring 30 which applies a force to the pad holder 4 to rotate it in the direction of the tip of the wedge body 24 is inserted. It is connected. Note that one end of the spring 30 is connected to a pin 31 attached to the pad holders 4, 4, and the other end is connected to the lower side of the fixing piece 10.
上記の構成において図示しないハンドル側のブ
レーキを操作することにより、ブレーキワイヤを
介してレバー２１に回動力が与えられ、このため
カム２０が軸２２を支点として回動するために、
そのカム面が一方のパツド保持体４の内面を押圧
するので、パツド保持体４，４に対してその上部
側が互いに離間するような力が作用し、これによ
りパツド保持体４，４は軸１８を支点をして回動
し、これによりパツド３，３がデイスク板１の両
面側に圧接してブレーキ力を与えることが出来
る。ここでパツド３，３とデイスク板１との摩擦
によつてデイスク板１の回転力によりパツド保持
体４，４に対し回動力がはたらき、パツド保持体
４，４がこれにより軸１３を支点として回動し、
その上部側に設けたベアリング２７，２７がテー
パ面が２５，２５におけるのぼり方向に沿つてス
ライドし、パツド保持体４，４に対して軸１８を
支点として回動するような力が作用するためにパ
ツド３をデイスク板１にさらに強力に圧接せしめ
ることが出来、ブレーキ力を高めることが出来
る。従つて運転者は単にカム２０を回動させ、パ
ツド３をデイスク板１側に圧接せしめるだけの力
を作用するだけで、以後はパツド３とデイスク板
１との摩擦力によつてパツド保持体４，４が軸１
３を支点として回動することにより、そのベアリ
ング２７がテーパ面２５にガイドされることから
パツド保持体４にはさらに大きな挾持力が作用し
さらに大きな制動力を与えることが出来る。尚、
運転者がブレーキレバーから手を離すとスプリン
グ３０によつてパツド保持体４がくさび体２４の
先端方向に復旧し、しかもスプリング２９によつ
てパツド３，３を有する側が開くような力が作用
するためにブレーキ力を解除することが出来る。
従つてブレーキをかけたのち復旧しないことによ
つて車輪がロツクされてしまうという問題を解消
することが出来、しかも本発明によるデイスクブ
レーキ装置は構造がきわめて簡単となり、かつ部
品点数が少ないために低コスト化を計ることが出
来る。 In the above configuration, by operating the brake on the handle side (not shown), rotational force is applied to the lever 21 via the brake wire, so that the cam 20 rotates about the shaft 22.
Since the cam surface presses the inner surface of one of the pad holders 4, a force is applied to the pad holders 4, 4 such that their upper sides are separated from each other. The pads 3, 3 can be pressed against both sides of the disc plate 1 to apply a braking force. Here, due to the friction between the pads 3, 3 and the disc plate 1, rotational force of the disc plate 1 acts on the pad holders 4, 4, and the pad holders 4, 4 are thereby moved around the shaft 13 as a fulcrum. rotate,
The tapered surfaces of the bearings 27, 27 provided on the upper side slide along the upward direction at 25, 25, and a force acts on the pad holders 4, 4 to rotate about the shaft 18 as a fulcrum. The pad 3 can be brought into even stronger pressure contact with the disc plate 1, and the braking force can be increased. Therefore, the driver simply rotates the cam 20 and applies enough force to press the pad 3 against the disc plate 1. From then on, the pad holder is moved by the frictional force between the pad 3 and the disc plate 1. 4,4 is axis 1
3 as a fulcrum, the bearing 27 is guided by the tapered surface 25, so that a larger clamping force acts on the pad holder 4, and a larger braking force can be applied. still,
When the driver releases his hand from the brake lever, the spring 30 causes the pad holder 4 to return toward the distal end of the wedge body 24, and the spring 29 applies a force that opens the side with the pads 3, 3. Therefore, the brake force can be released.
Therefore, it is possible to solve the problem of the wheels becoming locked due to failure to restore the brakes after applying the brakes.Moreover, the disc brake device according to the present invention has an extremely simple structure and has a small number of parts, so it is low cost. Cost reduction can be calculated.
以上説明したように本発明によるデイスクブレ
ーキ装置によれば端部の内面側にデイスク板に対
抗するパツドを有するパツド保持体をデイスク板
に対し直角方向に回動可能で、しかもデイスク板
に沿う如く回動可能に保持し、ブレーキレバー側
の力を伝達するブレーキワイヤによつて操作され
るカム機構によつて上記パツド保持体をデイスク
板に対し直角方向に回動し、かつ、上記パツド保
持体が上記パツドを介してデイスク板の回動力を
受けてデイスク板に沿つて回動する場合にパツト
保持体のパツド側がデイスク側方向に圧接する如
く、パツド保持体をガイドするガイド面を有する
ガイド部を設けるようにしたので、わずかなブレ
ーキ力を与えるだけでブレーキをかけることが出
来、握力の小さな者でもブレーキ操作が可能とな
る。又、本発明によればパツド保持体がデイスク
板の回転方向の力を受けて回動し、これによつて
ブレーキ力を与える構成となつているためにデイ
スク板の回転速度に応じてそのブレーキ力が加減
されるために、自転車に速度に応じたブレーキを
かけることが出来安全運転を確保することが出来
る。 As explained above, according to the disc brake device according to the present invention, the pad holder, which has a pad opposing the disc plate on the inner surface side of the end part, can be rotated in a direction perpendicular to the disc plate, and moreover, can be rotated along the disc plate. The pad holder is rotatably held and rotated in a direction perpendicular to the disc plate by a cam mechanism operated by a brake wire that transmits force from the brake lever side. a guide portion having a guide surface that guides the pad holder so that the pad side of the pad holder comes into pressure contact with the disk side when the pad rotates along the disk plate in response to the rotational force of the disc plate via the pad; Since this is provided, the brake can be applied by applying only a small amount of braking force, and even a person with small grip strength can operate the brake. Further, according to the present invention, the pad holder rotates in response to a force in the rotational direction of the disk plate, thereby applying a braking force, so that the brake force is applied in accordance with the rotational speed of the disk plate. Since the force is adjusted, the brakes can be applied to the bicycle according to the speed, ensuring safe driving.
第１図ないし第４図は本発明によるデイスクブ
レーキ装置の一実施例を示す正面図、側面図、平
面図、および断面図である。
１……デイスク板、２……車体フレーム、３…
…パツド、４……パツド保持体、７……ブラケツ
ト、１１……固定片、１３，１８……軸、２０…
…カム、２１……レバ、２４……くさび体、２５
……テーパ面、２６……保持枠、２７……ベアリ
ング、２９，３０……スプリング。
1 to 4 are a front view, a side view, a plan view, and a sectional view showing one embodiment of a disc brake device according to the present invention. 1...Disc plate, 2...Vehicle frame, 3...
...pad, 4...pad holder, 7...bracket, 11...fixing piece, 13, 18...shaft, 20...
...Cam, 21...Lever, 24...Wedge body, 25
... Tapered surface, 26 ... Holding frame, 27 ... Bearing, 29, 30 ... Spring.
Claims (1)
ツドを一端側に有する左右一一対のパツド保持体
を、 デイスク板に対してパツド保持体のパツドを設
けた一端側を相互に左右方向でパツドがデイスク
板を挟圧するよう接近させると共にデイスク板の
延長方向で対向する他端を離反する方向に回転可
能とすると共に、 前記パツドがデイスク板を挟圧した状態でパツ
ド保持体がデイスク板の側面に沿つて周方向に回
転可能となるよう取付け、 上記パツド保持体の対向する他端側の間で、車
輪の回転方向と反対の方向に向かつて漸次幅広と
なり、対向するパツド保持体の他端を離反方向に
押し広げるテーパ面を有するガイド部材を固定位
置に設け、 且つブレーキレバーで操作されて前記パツド保
持体をパツドがデイスク板を挟圧する位置まで回
動変位させるカム機構を設けてなることを特徴と
するデイスクブレーキ装置。[Scope of Claims] 1. A pair of left and right pad holders each having pressing pads on one end side facing each other so as to sandwich a disk plate, and one end side having pads of the pad holder against the disk plate. The pads are brought close to each other so as to pinch the disk plate in the left and right direction, and the other end facing each other in the extending direction of the disk plate can be rotated in a direction away from each other, and the pads are held in a state where the pads are pinching the disk plate. The pad body is installed so that it can rotate in the circumferential direction along the side surface of the disc plate, and between the opposite ends of the pad holder, the pads gradually become wider in the direction opposite to the rotational direction of the wheel, and are opposed to each other. A guide member having a tapered surface that pushes the other end of the pad holder apart in the direction of separation is provided at a fixed position, and the cam is operated by a brake lever to rotationally displace the pad holder to a position where the pad pinches the disk plate. A disc brake device characterized by being provided with a mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56071989A JPS57186643A (en) | 1981-05-13 | 1981-05-13 | Disk brake device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56071989A JPS57186643A (en) | 1981-05-13 | 1981-05-13 | Disk brake device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57186643A JPS57186643A (en) | 1982-11-17 |
| JPH0115731B2 true JPH0115731B2 (en) | 1989-03-20 |
Family
ID=13476376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56071989A Granted JPS57186643A (en) | 1981-05-13 | 1981-05-13 | Disk brake device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57186643A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5058712A (en) * | 1989-07-07 | 1991-10-22 | American Standard Inc. | Pre-loading pivotal pin connection for a disc brake assembly |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5549167U (en) * | 1978-09-26 | 1980-03-31 |
-
1981
- 1981-05-13 JP JP56071989A patent/JPS57186643A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57186643A (en) | 1982-11-17 |
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