JPS5952038B2 - Progressive press type - Google Patents
Progressive press typeInfo
- Publication number
- JPS5952038B2 JPS5952038B2 JP55185434A JP18543480A JPS5952038B2 JP S5952038 B2 JPS5952038 B2 JP S5952038B2 JP 55185434 A JP55185434 A JP 55185434A JP 18543480 A JP18543480 A JP 18543480A JP S5952038 B2 JPS5952038 B2 JP S5952038B2
- Authority
- JP
- Japan
- Prior art keywords
- station
- plate material
- die
- cam
- mold
- 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
Landscapes
- Press Drives And Press Lines (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は、板材に対して種々のプレス加工を連続して順
次行う順送リプレス型に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a progressive repress die that sequentially and sequentially performs various press workings on a plate material.
一般に、この種の順送リプレス型は、一つの型の中に、
各種形状の穴明け用パンチや外形抜き用パンチ等をセッ
トした抜き加工ステーションと切刃をセットした切断加
工ステーションとを順次配置してなり、プレス動作によ
り板材をワンピッチずつ移送しながら抜き加工ステーシ
ョンで抜き加工したのち、切断加工ステーションで板材
を切断して製品に仕上げるようにしたものである。Generally, this type of progressive repress mold contains
A punching station with hole punches of various shapes and punches for punching out external shapes, etc., and a cutting station with cutting blades are arranged in sequence, and the press operation moves the plate material one pitch at a time at the punching station. After punching, the plate material is cut into a finished product at a cutting station.
ところで、紋り、曲げ等の成形加工については板材に滑
りが生じて寸法ずれを起すことから、板材のままで他の
加工と連続して行うことができない。そのため、従来は
、この成形加工を、切断加工ステーションで板材から一
旦切断した後の帯状の板に対して施すことが行われてい
る。したがつて、その場合、成形加工用の別個のプレス
型が必要であるとともに、工程数も増加するという不具
合があつた。本発明はかかる点に鑑みてなされたもので
あり、上記した切断加工ステーションに続いて成形加工
ステーションを配置するとともに、該成形加工ステーシ
ョンに切断加工ステーションで板材から切断した帯状の
板を、プレス動作に伴つて作動するカム機構により自動
的に移送して、成形加工を行うようにすることにより、
抜き加工、切断加工および成形加工を一連に一つのプレ
ス動作によつて行うことができるようにした順送リプレ
ス型を提供せんとするものである。By the way, forming processes such as curving and bending cannot be carried out continuously with other processes while the plate material is being used, since slipping occurs in the plate material and causes dimensional deviations. Therefore, conventionally, this forming process is performed on a band-shaped plate that has been cut from the plate material at a cutting station. Therefore, in that case, a separate press mold for molding is required, and the number of steps also increases. The present invention has been made in view of this point, and a forming station is disposed following the above-mentioned cutting station, and a band-shaped plate cut from the plate material at the cutting station is placed in the forming station through a press operation. By automatically transporting the material using a cam mechanism that operates in accordance with the molding process,
It is an object of the present invention to provide a progressive repress mold that allows punching, cutting, and forming to be performed in series by one press operation.
以下、本発明を図面に示す実施例に基づいて詳細に説明
する。Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.
第1図ないし第5図において、1は上型であつて、該上
型1下面の所定位置には穴明け用パンチ2、2、2が板
材Al送り方向(第1図で左側から右側へ向う方向)に
順に並んで取付けられ、該穴明け用パンチ2、2、2の
前側(第1図で右側)には切刃部3aを備えた上刃3が
取付けられ、また該上刃3の前側には絞り用パンチ4が
取付けられている。1 to 5, reference numeral 1 is an upper die, and hole punches 2, 2, 2 are provided at predetermined positions on the lower surface of the upper die 1 in the feeding direction of the plate material Al (from the left side to the right side in FIG. 1). An upper blade 3 having a cutting edge 3a is installed on the front side (on the right side in FIG. 1) of the hole punches 2, 2, 2. A drawing punch 4 is attached to the front side.
一方、5は上記上型1の下方に対向して配置された下型
であつて、該下型5において、上型1の穴明け用パンチ
2、2、2と対向する位置には穴明け開口6a、6a、
6aを有する穴明け用ダイ6がセットされ、また上刃3
と対向する位置の後側(第1図で左側)には切刃部7a
を備えた下刃7が形成され、さらに絞り用パンチ4と対
向する位置には上記穴明け用ダイ6および下刃7の上面
よりも低い上面を有する絞り用ダイ8がセツトされてい
る。On the other hand, reference numeral 5 denotes a lower mold disposed facing below the upper mold 1, and in the lower mold 5, holes are formed at positions facing the hole punches 2, 2, 2 of the upper mold 1. Openings 6a, 6a,
A hole-making die 6 having a diameter of 6a is set, and the upper blade 3
There is a cutting edge 7a on the rear side (left side in Fig. 1) of the position facing the
A lower blade 7 is formed, and a drawing die 8 having an upper surface lower than the upper surfaces of the hole-making die 6 and the lower blade 7 is set at a position facing the drawing punch 4.
よつて、上型1と下型5の間を前方にワンピツチずつ移
送される板材A,に対し、穴明け用パンチ2,2,2お
よびダイ6により抜き加工する抜き加エステーシヨン9
に続いて、上刃3および下刃7により板材A,を帯状の
板A。に切断加工する切断加エステーシヨン10と、該
帯状の板A。を絞り用パンチ4およびダイ8により絞り
加工する成形加エステーシヨン11とが順次配置されて
いる。上記抜き加エステーシヨン9における上型1の板
材A,送り方向に沿う両側位置(第1図および第2図で
は紙面と平行な両側位置、第4図では左右両側位置)に
は下方に突出する駆動カム12,12が一体に取付けら
れ、該各駆動カム12はその下端部に前側から後側に向
つて上方に傾斜するカム面12aを有している。Therefore, the punching station 9 punches the plate material A, which is transferred forward one pitch at a time between the upper mold 1 and the lower mold 5, using the hole punches 2, 2, 2 and the die 6.
Subsequently, the upper blade 3 and the lower blade 7 cut the plate material A into a belt-shaped plate A. A cutting station 10 that cuts the strip-shaped plate A. A drawing punch 4 and a forming station 11 for drawing the material using a die 8 are sequentially arranged. In the punching station 9, the plate material A of the upper mold 1 has downwardly protruding parts at both sides along the feeding direction (in Figs. 1 and 2, both sides parallel to the plane of the paper, and in Fig. 4, both left and right sides). Drive cams 12, 12 are integrally attached, and each drive cam 12 has a cam surface 12a at its lower end that slopes upward from the front side toward the rear side.
一方、上記抜き加工.ステーシヨン9における下型5の
板材A,送り方向に沿う両側部(第1図および第2図で
は紙面と平行な両側部、第4図では左右両側部)には上
記上型1の駆動カム12,12を挿通案内する上下方向
の案内孔13a,13aを有する従動カム13,13が
、前後に下型5の上記両側部に対してそれぞれ摺動可能
に、かつ従動カム13,13後方の下型5との間に縮装
したスプリング14,14により板材A,送り方向(前
方)に付勢せしめて配設され、該各従動カム13の上記
案内孔13.aの後側上部には上記駆動カム12のカム
面12aと同方向に傾斜して該カム面12aに摺接する
カム面13bが形成されており、上型1の下型5に対す
るプレス動作において、上型1の上昇に伴う駆動カム1
2,12の上昇時には該駆動カム1.2,12の従動カ
ム13,13に対する押圧を解除してスプリング14,
14の付勢力により従動カム13,13を前進させる一
方、上型1の下降に伴う駆動カム12,12の下降によ
り該駆動カム12,12のカム面12a,12aで従動
カム13,13のカム面13b,13bを押圧せしめて
、該従動カム13,13をスプリング14,14の付勢
力に抗して後退させるように構成されている。さらに、
上記下型5の切断加エステーシヨン10に相当する両外
側面、つまり下刃7の板材A,送り方向に沿う両側面に
は、一対の切欠き案内部15,15が形成され、一方、
上記各従動カム13において下型5との対向面の前端位
置、つまり板材A,送り方向前部には上記切欠き案内部
15内に案内されて収納される後押し部材16が一体に
突設されており、各従動カム13の前後移動に伴つて後
押し部材16を切欠き案内部15内に没入する位置(図
で実線にて示す位置)と、切欠き案内部15から突出し
て成形加エステーシヨン11近くまで到達する位置(図
で仮想線にて示す位置)との間を前後に移動せしめて、
その前進移動時に上記切断加エステーシヨン10で板材
A,から切断された帯状の板A。On the other hand, the above punching process. The drive cam 12 of the upper mold 1 is attached to the plate material A of the lower mold 5 in the station 9, on both sides along the feeding direction (both sides parallel to the plane of the paper in FIGS. 1 and 2, left and right sides in FIG. 4). The driven cams 13, 13 having vertical guide holes 13a, 13a for inserting and guiding the driven cams 13, 12 are slidable in the front and rear directions on both sides of the lower mold 5, respectively, and The plate material A is biased in the feeding direction (forward) by springs 14, 14 compressed between the die 5 and the guide holes 13. of the respective driven cams 13. A cam surface 13b is formed at the rear upper part of a, and is inclined in the same direction as the cam surface 12a of the drive cam 12 and slides into sliding contact with the cam surface 12a. Drive cam 1 as upper mold 1 rises
When the cams 2 and 12 rise, the pressure of the drive cams 1 and 2 and 12 against the driven cams 13 and 13 is released and the springs 14 and
While the driven cams 13, 13 are moved forward by the urging force of the upper mold 1, the cams of the driven cams 13, 13 are moved forward by the cam surfaces 12a, 12a of the driving cams 12, 12 due to the lowering of the driving cams 12, 12 as the upper die 1 is lowered. The driven cams 13, 13 are configured to be moved backward against the urging force of the springs 14, 14 by pressing the surfaces 13b, 13b. moreover,
A pair of notch guide portions 15, 15 are formed on both outer surfaces of the lower mold 5 corresponding to the cutting station 10, that is, on both side surfaces of the plate material A of the lower blade 7 along the feeding direction.
In each of the driven cams 13, at the front end position of the surface facing the lower mold 5, that is, at the front of the plate material A in the feeding direction, a boosting member 16 that is guided and housed in the notch guide portion 15 is integrally protruded. As each driven cam 13 moves back and forth, the boosting member 16 is moved into the notch guide section 15 at a position (the position indicated by the solid line in the figure) and at the molding station where it protrudes from the notch guide section 15. By moving back and forth between the position where it reaches nearly 11 (the position indicated by the imaginary line in the figure),
A strip-shaped plate A is cut from the plate material A by the cutting station 10 during its forward movement.
の後側両角部を押して成形加エステーシヨン11に移送
するようになされている。よつて、一連の加工の途中の
切断加工ステーシヨン10で板材A,を切断し、該切り
離した帯状の板A。をプレス動作に伴う後押し部材16
,16の前進移動により成形加エステーシヨン11に移
送して、該成形加エステーシヨン11において立体形状
の物品A。に加工するように構成されている。尚、17
は板材A1をガイドするガイドローラ、18は板材A,
を下型5に対して押圧保持するプレツサ、19は切断加
エステーシヨン10で切断された帯状の板A。を成形加
エステーシヨン11に移送する際に停止規制するストツ
パ、20は成形加工後の物品A,を排出するための圧縮
エアを供給する圧縮エア供給路、21は帯状の板A。を
一時吸着固定するマグネツトである。次に、上記実施例
の作動について説明すれば、フープ等から供給された連
続する板材A,は上型1が上昇下降を繰返すプレス動作
によりワンピツチずっ前進しながら、抜き加エステーシ
ヨン9で穴明け用パンチ2,2,2および゛ダイ6によ
りそれぞれ穴明け加工され、その後切断加工ステーシヨ
ン10で上型1の下降時において両刃3,7により帯状
の板A。The paper is transferred to the molding station 11 by pressing both rear corners of the paper. Therefore, the plate material A is cut at the cutting station 10 in the middle of a series of processing, and the separated strip-shaped plate A is obtained. The boosting member 16 accompanying the press operation
, 16 to the shaping station 11, where the three-dimensional article A is transferred. It is configured to process. In addition, 17
18 is a guide roller that guides the plate material A1, 18 is the plate material A,
19 is a belt-shaped plate A cut by the cutting station 10. 20 is a compressed air supply path for supplying compressed air for discharging the article A after the molding process; 21 is a belt-shaped plate A; It is a magnet that temporarily attracts and fixes. Next, to explain the operation of the above embodiment, the continuous plate material A, supplied from a hoop or the like, is punched by the punching station 9 while the upper mold 1 moves forward one pitch at a time by a press operation in which the upper die 1 repeatedly rises and falls. Holes are punched using the punches 2, 2, 2 and the die 6, and then at the cutting station 10, when the upper mold 1 is lowered, the double-edged blades 3 and 7 are used to form a band-shaped plate A.
に切断される。そして、上記切断後の帯状の板A。is cut off. And the band-shaped plate A after the above-mentioned cutting.
は紋り用ダイ8上面の上刃3下方位置に落下して、マグ
ネツト21により吸着固定されるが、そのとき、上記切
断時の上型1の下降に伴つて駆動カム12,12が下降
し、この駆動カム12,12の下降により従動カム13
,13がスプリング14,]4の付勢力に後退すること
により、該各従動カム13に一体に設けられた後押し部
材16が後退して切欠き案内部]5内に没入するので、
上型1の下降端位置では上記後押し部材16,16は上
記絞り用ダイ8上面に固定された帯状の板A2に対して
後側に位置している。この後、上型]が上昇すると、そ
れに伴つて駆動カム12,12が上昇し、この駆動カム
12,12の上昇によりその従動カム13,13に対す
る押圧が解除されて従動カム13,13がスプリング1
4,]4の付勢力により前進し、この従動カム]3,]
3の前進によりそれと一体の後押し部材16,]6が切
欠き案内部15,15から突出しながらその前方に位置
する上記帯状の板A2の後側両角部を後押しして、成形
加エステーシヨン11における絞り用ダイ8上面のスト
ツパ]9で規制される位置まで移送し、帯状の板A2は
該位置に設けられたマグネツト21,21により吸着固
定される。The blade falls to a position below the upper blade 3 on the upper surface of the embossing die 8 and is attracted and fixed by the magnet 21, but at that time, the drive cams 12, 12 are lowered as the upper die 1 is lowered during cutting. , the driven cam 13 is lowered by the lowering of the driving cams 12, 12.
, 13 retreat due to the biasing force of the springs 14, ]4, the boosting member 16 integrally provided to each of the driven cams 13 retreats and retracts into the notch guide section ]5.
At the lower end position of the upper mold 1, the boosting members 16, 16 are located on the rear side with respect to the band-shaped plate A2 fixed to the upper surface of the drawing die 8. After that, when the upper die] rises, the drive cams 12, 12 rise accordingly, and as the drive cams 12, 12 rise, the pressure on the driven cams 13, 13 is released, and the driven cams 13, 13 spring. 1
The driven cam moves forward due to the urging force of 4,]4, and this driven cam moves forward due to the biasing force of 4,]
3 moves forward, the pushing members 16, ] 6 integral therewith protrude from the notch guide parts 15, 15 and push both rear corners of the band-shaped plate A2 located in front of the notch guide parts 15, 15, thereby pushing the rear corners of the band-shaped plate A2 in the forming station 11. The strip-shaped plate A2 is transferred to a position regulated by a stopper] 9 on the upper surface of the drawing die 8, and the strip-shaped plate A2 is attracted and fixed by magnets 21, 21 provided at that position.
次に上型]が下降すると、抜き加エステーシヨン9での
穴明け加工および切断加エステーシヨン10での切断加
工が上記と同様に行われるとともに、従動カム13,1
3が後退して後押し部材16,16が切欠き案内部]5
,]5に内に没入し、それと同時に、上記成形加エステ
ーシヨン]1において上記絞りダイ8上に固定されてい
た帯状の板A2が絞り用パンチ4およびダイ8により絞
り加工されて立体形状の物品A3に形成される。Next, when the upper mold is lowered, the punching station 9 performs hole-drilling and the cutting station 10 performs cutting in the same manner as described above, and the driven cams 13 and 1
3 retreats and the backing members 16, 16 become the notch guide parts] 5
, ]5, and at the same time, the strip-shaped plate A2 fixed on the drawing die 8 in the forming station ]1 is drawn by the drawing punch 4 and the die 8 to form a three-dimensional shape. It is formed into article A3.
尚、この立体形状の物品A3は上型1の上昇時に圧縮エ
ア供給路20からの圧縮エアの噴出によつて排出される
。したがつて、本実施例では、このように上型1のプレ
ス動作により板材A1に対する穴明け加工および切断加
工、並びに該切断加工された帯状の.板A2に対する絞
り加工を連続して自動的に行うことができるので、従来
の如く成形用プレス型を別個に用意せずに済み、またプ
レス加工における工程数を減少することができる。Note that this three-dimensional article A3 is discharged by the jet of compressed air from the compressed air supply path 20 when the upper die 1 is raised. Therefore, in this embodiment, the pressing operation of the upper die 1 performs the drilling and cutting of the plate material A1, as well as the cutting of the cut strip. Since the drawing process for the plate A2 can be performed continuously and automatically, there is no need to separately prepare a press die for forming as in the conventional case, and the number of steps in press process can be reduced.
尚、上記実施例では、抜き加エステーシヨン9・で゛穴
明け用パンチ2,2,2および゛ダイ6により板材A1
に穴明け加工を行い、また成形加エステーシヨン11で
絞り用加工パンチ4およびダイ8により帯状の板A2に
絞り加工を行うようにしたが、抜き加エステーシヨンに
外形抜き用パンチおよびダイをセツトし、また成形加エ
ステーシヨンに曲げ用パンチおよび゛ダイをセツトして
、板材に外形抜き加工を行つたり、あるいは帯状の板材
に曲げ加工を行うようにすることも可能である。In the above embodiment, the punches 2, 2, 2 and the die 6 are used to punch the plate material A1 in the punching station 9.
In addition, the forming station 11 performs a drawing process on the strip-shaped plate A2 using the drawing punch 4 and die 8, but the punch and die for punching the outside shape are set in the punching station 11. However, it is also possible to set a bending punch and a die in the forming station to punch out the outline of a plate material or to bend a strip-shaped plate material.
以上説明したように、本発明の順送リプレス型によれば
、板材を抜き加工する抜き加エステーシヨンに続いて切
刃による切断加エステーシヨンと絞り、曲げ等の成形加
エステーシヨンとを順次配置し、上型に駆動カムを取付
ける一方、下型の板材送り方向に沿う側部に上記駆動カ
ムの下降により後退する従動カムを上記板材送り方向に
下型の上記側部に対して摺動可能に、かつスプリングに
より上記板材送り方向に付勢して設け、さらに該従動カ
ムの板材送り方向前部に、板材から切断した帯状の板を
成形加エステーシヨンに移送する後押し部材を設け、一
連の加工の途中で板材を切断し、該切り離した帯状の板
をプレス動作により移送して立体形状の物品に加工する
ようにしたものであるので、−プレス動作で抜き加工、
切断加工および成形加工を一連に自動的に行うことがで
き、よつてプレス型の簡略化および加工工程数の減少化
を図ることができるものである。As explained above, according to the progressive repress die of the present invention, the punching station for punching a plate material is followed by the cutting station using a cutting blade and the forming station for drawing, bending, etc. The drive cam is attached to the upper die, while the driven cam, which retreats as the drive cam descends, is slidable on the side of the lower die along the plate feeding direction in the plate feeding direction. and is biased in the plate material feeding direction by a spring, and furthermore, a boosting member is provided in front of the driven cam in the plate material feeding direction to transfer the strip-shaped plate cut from the plate material to the forming station, and a series of The plate material is cut in the middle of processing, and the separated strip-shaped plate is transferred by a press operation to be processed into a three-dimensional article.
Cutting and forming can be performed automatically in series, thereby simplifying the press mold and reducing the number of processing steps.
図面は本発明の実施例を示すもので、第1図は板材の加
工位置における縦断側面図、第2図は第1図において手
前側の駆動カムと従動カムとの配置位置における縦断側
面図、第3図は第1図の111111線断面図、第4図
は下型の平面図、第5図は第4図のV−V線拡大断面図
である。
1・・・・・・上型、5・・・・・・下型、9・・・・
・・抜き加エステーシヨン、10・・・・・・切断加エ
ステーシヨン、11・・・・・・成形加エステーシヨン
、12・・・・・・駆動カム、]6・・・・・・後押し
部材、A1・・・・・・板材、A2・・・・・・板、A
3・・・・・・物品。The drawings show an embodiment of the present invention, and FIG. 1 is a longitudinal side view at a processing position of a plate material, FIG. 2 is a longitudinal side view at a position where a driving cam and a driven cam on the near side in FIG. 1 are arranged. 3 is a sectional view taken along the line 111111 in FIG. 1, FIG. 4 is a plan view of the lower mold, and FIG. 5 is an enlarged sectional view taken along the line V-V in FIG. 4. 1...Top mold, 5...Bottom mold, 9...
...Blanking station, 10... Cutting station, 11... Forming station, 12... Drive cam, ]6... Pushing Member, A1...Plate material, A2...Plate, A
3... Goods.
Claims (1)
切刃による切断加工ステーションと絞り、曲げ等の成形
加工ステーションとを順次配置し、上型に駆動カムを取
付ける一方、下型の板材送り方向に沿う側部に上記駆動
カムの下降により後退する従動カムを上記板材送り方向
に下型の上記側部に対して摺動可能に、かつスプリンン
グにより上記板材送り方向に付勢して設け、さらに該従
動カムの板材送り方向前部に、板材から切断した帯状の
板を成形加工ステーションに移送する後押し部材を設け
、一連の加工の途中で板材を切断し、該切り離した帯状
の板をプレス動作により移送して立体形状の物品に加工
するようにしたことを特徴とする順送りプレス型。1. Following the punching station for punching plate materials, a cutting station using a cutting blade and a forming station for drawing, bending, etc. are arranged in sequence, and a drive cam is attached to the upper mold, while a drive cam is attached to the upper die along the direction in which the lower mold feeds the plate material. A driven cam is provided on the side so as to be retracted by the descent of the drive cam so as to be able to slide against the side of the lower die in the sheet material feeding direction, and is biased in the sheet material feeding direction by a spring; A booster member is installed at the front of the cam in the sheet material feeding direction to transport the strip-shaped plate cut from the sheet material to the forming processing station.The plate material is cut in the middle of a series of processing, and the cut-off strip-shaped plate is transferred by a press operation. A progressive press mold is characterized in that it can be processed into three-dimensional articles.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55185434A JPS5952038B2 (en) | 1980-12-29 | 1980-12-29 | Progressive press type |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP55185434A JPS5952038B2 (en) | 1980-12-29 | 1980-12-29 | Progressive press type |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57113000A JPS57113000A (en) | 1982-07-14 |
JPS5952038B2 true JPS5952038B2 (en) | 1984-12-17 |
Family
ID=16170713
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP55185434A Expired JPS5952038B2 (en) | 1980-12-29 | 1980-12-29 | Progressive press type |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5952038B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH025482U (en) * | 1987-09-24 | 1990-01-16 |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4710054B2 (en) * | 2002-09-30 | 2011-06-29 | Dowaメタルテック株式会社 | Manufacturing method and manufacturing apparatus for heat sink for electronic device |
CN108356143B (en) * | 2018-04-20 | 2024-03-19 | 杨金兴 | Integrated process and device for punching, flanging and trademark punching |
-
1980
- 1980-12-29 JP JP55185434A patent/JPS5952038B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH025482U (en) * | 1987-09-24 | 1990-01-16 |
Also Published As
Publication number | Publication date |
---|---|
JPS57113000A (en) | 1982-07-14 |
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