JPS60248335A - 硬質熱可塑性合成樹脂薄板と軟質熱可塑性合成樹脂シ−トとの高周波熔着法 - Google Patents

硬質熱可塑性合成樹脂薄板と軟質熱可塑性合成樹脂シ−トとの高周波熔着法

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Publication number
JPS60248335A
JPS60248335A JP59105497A JP10549784A JPS60248335A JP S60248335 A JPS60248335 A JP S60248335A JP 59105497 A JP59105497 A JP 59105497A JP 10549784 A JP10549784 A JP 10549784A JP S60248335 A JPS60248335 A JP S60248335A
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JP
Japan
Prior art keywords
synthetic resin
upper electrode
thermoplastic synthetic
resin sheet
sheet
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.)
Granted
Application number
JP59105497A
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English (en)
Other versions
JPS6337691B2 (ja
Inventor
Kazuichi Nishino
西野　一一
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Individual
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Individual
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Priority to JP59105497A priority Critical patent/JPS60248335A/ja
Publication of JPS60248335A publication Critical patent/JPS60248335A/ja
Publication of JPS6337691B2 publication Critical patent/JPS6337691B2/ja
Granted legal-status Critical Current

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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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/72—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by combined operations or combined techniques, e.g. welding and stitching
    • 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
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/03—After-treatments in the joint area
    • B29C66/032—Mechanical after-treatments
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/326—Shaping the burr, e.g. by the joining tool
    • B29C66/3262—Shaping the burr, e.g. by the joining tool as after-treatment, e.g. by a separate tool
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/433—Casing-in, i.e. enclosing an element between two sheets by an outlined seam
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81413—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being non-symmetrical
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • 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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B29C67/0044—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00 for shaping edges or extremities
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/133—Fin-type joints, the parts to be joined being flexible
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/814—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81415—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being bevelled

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 本発明は硬質熱可塑性合成樹脂薄板と軟質熱可塑性合成
樹脂シートとの新規な高周波溶着法に関するものであっ
て、■縁が手指などを損傷しないようにする小さい玉縁
な同縁に自然にできるようにすること、■従来の加工法
と同程度の加工能力を確保すること、■優美で安全な製
品を得るようにすること等を目的とするものである。
本発明は加熱した特別仕立の上部電極で高周波溶着する
ことによって上記の目的を達成するものであって、以下
、本発明の実施例を図面に依拠して説明する。
先ず、下端面の外周縁から途中までを内方に向ってほん
の僅かだけ（できる限り小さい角度にすることが望まし
い）上傾する緩斜面（１）とし同じく途中から内周縁ま
でを内方に向って急な勾配で上傾する急斜面（２）とし
た自己加熱用ヒーター装置（３）′付きの上部電極（３
）を構成し、この上部電極（３）を下部電極（４）の上
方に配装する。
然るのち、下部電極（４）の上に絶縁シート（１１を敷
設しこの絶縁シー）　（１１の上に硬質熱可塑性合成樹
脂薄板（５）と軟質熱可塑性合成樹脂シート（６）とを
同硬質熱可塑性合成樹脂薄板（５）が下側となるように
重合し且つ両者（５１（６）の間に厚紙芯材（７）を挟
入して載置する（第１図参照）。
次いで、上部電極（３）を押下して其の下端面を軟質熱
可塑性合成樹脂シート（６）の上面に於て厚紙芯材（７
）の周縁の外側個所に所定大きさの圧力およびヒーター
装置（３）′にょる所定温度の加熱で圧着せしめ（第２
図参照）つりこれ等上下両電極に高周波電圧を印加する
（第３図参照）。
更に、この印加による溶融と上記の加熱書＝よる溶融と
上記の圧力とにより上部電極（３）カー沈降（第４図参
照）して同上部電極（３）の外周縁カｌ絶縁シー）　Ｑ
ｌの上面にほぼ達した時点で高周波電圧の印加を停止さ
せると共に上部電極（３）を上昇させて元の位置に戻す
。
尚、上部電極（３）に加熱装置による加熱が施されない
で行う分子の回転摩擦熱を利用する従来の高周波誘電発
熱は、上部電極の先端部ζ二基ず数ミクロンの薄膜が残
って溶断することカミなり１ようになるが、本発明は上
記のようζ１上部電極（３）を加熱装置により加熱して
高周波溶着を行うようにしたので、上記の薄膜をよ１ノ
薄くすることが可能であって後述する不要部分のちぎり
取りによる除去が容易になり且つちぎり取り跡がきれい
になるものである。
次いで、上部電極（３）の戻り直後の未だ薄肉部が冷却
しないうちに被加工物（１１）を電極（３１（４１間よ
り取去して不要部分（余剰部分）（８）をちぎり取り法
により除去する（第５図参照）。
斯して、上部電極（３）の緩斜面（１）による薄肉状の
溶着部分（９）を自刃（自然冷却による収縮力のバラン
ス）によりカールさせて溶着を完了する（第６図参照）
。
本発明は叙上の通りであるので例えば硬質熱可塑性合成
樹脂薄板を以て構成した周壁の裾まわりに外向きフラン
ジ状溶着部を一体に有する皿形状ケース本体を下面に軟
質熱可塑性合成樹脂シートを当てた厚紙芯材の上に載置
して当該ケース本体の外向フランジ状溶着部と軟質熱可
塑性合成樹脂シートとを厚紙芯材の周縁の外側に於て相
互に爆着する（ケース本体を下側として行う）等の場合
に採用できるものであって、当該溶着は極めて容易に為
し得る著効があるのみならず上記のように溶着部のちぎ
り縁は自然に且つ確実にカールするのでこの部が完成品
の使用者の手指に損傷を与えたりする危惧がなく。
また急斜面側による爆着よりも緩斜面側による爆着の方
を長い時間おこなう方法であるので例えば厚紙芯材（７
）の図に於ける左上の角に対応する軟質熱可塑性合成樹
脂シートの角部分が所謂焼き切れたり薄くなったりする
ことがない利点があり、更に上部電極を殊更に加熱して
おいて溶着加工を行いこれにより上記のように薄膜をよ
り薄くすべくしたので不要部分のちぎり取りによる除去
が容易になり且つちぎり取り跡すなわちカール部分がき
れいに仕上って好ましい等の優れた効果を奏するもので
ある。
【図面の簡単な説明】
図は本発明の実施例を示すものであって、第１図は準備
工程を示す説明図、第２図は上部電極の圧着状態を示す
説明図、第３図は高周波電圧印加の途中の状態を示す説
明図、第４図は高周波電圧印加を停止する直前の状態を
示す説明図、第５図は不要部分をちぎりとった状態を示
す説明図、第６図は最終工程を示す説明図である。 （１）・・・緩斜面、（２）・・・急斜面、（３）・・
・上部電極、（３）′　・・・ヒーター装置、（４）・
・・下部電極、（５）・・・硬質熱可塑性合成樹脂薄板
、（６）・・・軟質熱可塑性合成樹脂シート、（７）・
・・厚紙芯材、（８）・・・不要部分、（９）・・・薄
肉溶着部分、ａＯ・・・絶縁シート、（１］ｌ・・・被
加工物。 第２図 １ 第３図 第４図 第５図 第６図

Claims (1)

    【特許請求の範囲】
  1. 下端面の外周縁から途中までを内方に向ってほんの僅か
    だけ上傾する緩斜面とし同じく途中から内周縁までを内
    方に向って急な勾配で上傾する急斜面とした自己加熱装
    置付きＬ部電極を構成し、この上部電極を下部電極の上
    方に配装すると共に下部電極の上に絶縁シートを敷設し
    、この絶縁シートの上に硬質熱可塑性合成樹脂薄板と軟
    質熱可塑性合成樹脂シートとを重合して載置し、然るの
    ち自己加熱装置により加熱された上部電極を押下して其
    の下端面を合成樹脂シートの上面に所定大きさの圧力お
    よび上記の加熱装置による所定温度の加熱で圧着せしめ
    つつこれ等上下電極に高周波電圧を、上部電極の外周縁
    が絶縁シートにほぼ達するまで印加して当該印加を停止
    すると共にこの停止後に上部電極を上昇させて元の位置
    に戻し被加工品の取出および不要部分の除却を行って上
    部電極の緩斜面による薄肉状の溶着部分を自刃によりカ
    ールさせることを特徴とする硬質熱可塑性合成樹脂薄板
    と軟質熱可塑性合成樹脂シートとの高周波溶着法。
JP59105497A 1984-05-24 1984-05-24 硬質熱可塑性合成樹脂薄板と軟質熱可塑性合成樹脂シ−トとの高周波熔着法 Granted JPS60248335A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59105497A JPS60248335A (ja) 1984-05-24 1984-05-24 硬質熱可塑性合成樹脂薄板と軟質熱可塑性合成樹脂シ−トとの高周波熔着法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59105497A JPS60248335A (ja) 1984-05-24 1984-05-24 硬質熱可塑性合成樹脂薄板と軟質熱可塑性合成樹脂シ−トとの高周波熔着法

Publications (2)

Publication Number Publication Date
JPS60248335A true JPS60248335A (ja) 1985-12-09
JPS6337691B2 JPS6337691B2 (ja) 1988-07-26

Family

ID=14409233

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59105497A Granted JPS60248335A (ja) 1984-05-24 1984-05-24 硬質熱可塑性合成樹脂薄板と軟質熱可塑性合成樹脂シ−トとの高周波熔着法

Country Status (1)

Country Link
JP (1) JPS60248335A (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2731381A1 (fr) * 1995-03-06 1996-09-13 Rockwell Bcs France Ensemble d'electrodes pour souder des revetements en matiere plastique
EP0857562A3 (de) * 1997-02-11 1999-02-10 Marcel Hofsäss Schrumpfkappe und Verfahren zu ihrer Herstellung sowie mit der Schrumpfkappe versehenes Bauteil

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2731381A1 (fr) * 1995-03-06 1996-09-13 Rockwell Bcs France Ensemble d'electrodes pour souder des revetements en matiere plastique
EP0857562A3 (de) * 1997-02-11 1999-02-10 Marcel Hofsäss Schrumpfkappe und Verfahren zu ihrer Herstellung sowie mit der Schrumpfkappe versehenes Bauteil
US6115916A (en) * 1997-02-11 2000-09-12 Hofsaess; Marcel Method of manufacturing a shrink-on cap

Also Published As

Publication number Publication date
JPS6337691B2 (ja) 1988-07-26

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