JPH07227638A - Set tool for forging and heading - Google Patents
Set tool for forging and headingInfo
- Publication number
- JPH07227638A JPH07227638A JP2430494A JP2430494A JPH07227638A JP H07227638 A JPH07227638 A JP H07227638A JP 2430494 A JP2430494 A JP 2430494A JP 2430494 A JP2430494 A JP 2430494A JP H07227638 A JPH07227638 A JP H07227638A
- Authority
- JP
- Japan
- Prior art keywords
- hole
- die
- mold
- reinforcing case
- tapered
- 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
Links
Landscapes
- Forging (AREA)
- Physical Vapour Deposition (AREA)
- Chemical Vapour Deposition (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ボルト、ナットその他
の機械部品を鍛造・圧造成形するために使用するダイ
ス、パンチ等の組み工具に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an assembly tool such as a die and a punch used for forging and press forming of bolts, nuts and other mechanical parts.
【０００２】[0002]
【従来技術】出願人は以前に、図１、図２に示す如く、
製品ブランクが直接に接する金型（３）を補強ケース
（２）に収容し、金型の寿命に応じて、金型（３）のみ
を交換し、補強ケースは繰り返して使用できる組み工具
を提案した（実公昭５５−１９６４４号公報）。それは
図２に示す如く、ダイブロック（６）と呼ばれる取付け
台に開設された収容穴（61）に組み工具（１）嵌めて、
クランプボルト（７）によって押圧固定される。該組み
工具（１）は、補強ケース（２）の中心に貫通孔（21）
を開設し、貫通孔（21）の先部には外方に向って小径化
するテーパ孔（22）を形成し、該補強ケース（２）のテ
ーパ孔（22）に、先部が小径化するテーパ周面を有する
金型（３）を嵌め、貫通孔（21）には台型（４）を摺動
可能に嵌めて金型（３）を支持せしめると共に、貫通孔
（21）内面に形成されたネジ面（23）に押上台（５）を
螺合し、該押上台（５）が台型（４）を支持している。
金型（３）を補強ケース（２）に収容するには、予め各
型（４）（５）を緩く嵌めた状態で、補強ケースのテー
パ孔開口を下向きにして定盤の上へ置き、プレス機によ
って台型（４）の底面を加圧して、金型（３）の表面が
補強ケース（２）の表面と揃うまで金型（３）をテーパ
孔（22）中へ圧入し、台型（４）を加圧しながら、押上
台（５）を螺じ上げて、押上台（５）の先端面によって
台型（４）を支持させるのである。BACKGROUND OF THE INVENTION Applicants have previously reported that, as shown in FIGS.
A tool (3) in which the product blank is in direct contact is housed in the reinforcing case (2), only the mold (3) is replaced according to the life of the tool, and the reinforcing case is proposed as a tool that can be used repeatedly. (Japanese Utility Model Publication No. 55-19644). As shown in FIG. 2, the assembly tool (1) is fitted into the accommodation hole (61) formed in the mount called the die block (6),
It is pressed and fixed by the clamp bolt (7). The assembling tool (1) has a through hole (21) at the center of the reinforcing case (2).
And a tapered hole (22) is formed at the tip of the through hole (21) to reduce its diameter toward the outside, and the tip of the tapered hole (22) of the reinforcing case (2) is reduced in diameter. The die (3) having a tapered peripheral surface is fitted, the trapezoidal die (4) is slidably fitted in the through hole (21) to support the die (3), and the inner surface of the through hole (21) is The push-up base (5) is screwed onto the formed screw surface (23), and the push-up base (5) supports the trapezoidal die (4).
In order to store the mold (3) in the reinforcing case (2), the molds (4) and (5) are loosely fitted in advance, and the taper hole opening of the reinforcing case is faced downward and placed on the surface plate, The press machine pressurizes the bottom surface of the die (4) and presses the die (3) into the tapered hole (22) until the surface of the die (3) is aligned with the surface of the reinforcing case (2). While pushing the die (4), the push-up base (5) is screwed up, and the trapezoidal die (4) is supported by the tip surface of the push-up base (5).
【０００３】金型（３）は、鍛造、圧造の衝撃を受ける
毎に弾性変形し、数万〜数１０万回の加工によって摩耗
する。金型の交換時期が来れば、組み工具（１）をダイ
ブロック（６）から外し、金型（３）のみを補強ケース
（２）から取り出し、交換して、再びダイブロツク
（６）に固定される。金型（３）は高価であり、しかも
金型交換の際には、製造作業を中断せねばならないか
ら、作業能率の面からも金型の耐久性を向上する強い要
求がある。The die (3) is elastically deformed each time it is subjected to the impact of forging and forging, and is worn by the processing of tens of thousands to hundreds of thousands of times. When it is time to replace the mold, remove the assembly tool (1) from the die block (6), take out only the mold (3) from the reinforcing case (2), replace it, and fix it again on the die block (6). It The mold (3) is expensive, and since the manufacturing work must be interrupted when the mold is replaced, there is a strong demand for improving the durability of the mold in terms of work efficiency.
【０００４】そこで、消耗品である金型（３）自体の鍛
造表面に化学蒸着法或いは物理蒸着法によりＴｉＣ、Ｔ
ｉＣＮ、ＴｉＮ等の層を形成して耐摩耗性を向上させ、
金型の寿命を延長することが行なわれている。また、製
作すべき製品の形状が変わる都度、鍛造・圧造工具
（１）はロボットによって自動交換される。工具（１）
の自動変換の際、クランプボルト（７）が緩められ、工
具が交換された後、クランプボルト（７）が締められ
る。Therefore, TiC and T are formed on the forged surface of the consumable die (3) itself by chemical vapor deposition or physical vapor deposition.
By forming a layer of iCN, TiN, etc. to improve wear resistance,
The life of the mold is extended. The forging / forging tool (1) is automatically replaced by the robot whenever the shape of the product to be manufactured changes. Tool (1)
During the automatic conversion of the clamp bolt (7) is loosened, the tool is replaced and then the clamp bolt (7) is tightened.
【０００５】[0005]
【解決しようとする問題点】金型の寿命は、鍛造・圧造
の加圧が繰り返して作用するときの弾性変形に大きい影
響を受けるから、鍛造・圧造時の加圧に耐える様に、金
型を補強ケースのテーパ孔へ締まり嵌め状態に圧入し
て、高い予圧を加えることが行なわれている。予圧が作
用することによって、鍛造・圧造時の大なる加圧を打ち
消して金型の寿命を延長することが出来るのである。従
って、金型の予圧は大きければ、大きい程、寿命を延ば
すことが出来るのであるが、そのためにはテーパ孔の締
まり代を大きく設計し、テーパ孔へ金型を圧入するとき
の圧入寸法を増加させねばならない。しかし金型をテー
パ孔（22）へ初期の挿入状態から、最終の図２の状態ま
で圧入すると、圧入に伴なって金型周面とテーパ孔内面
とは烈しい摩擦状態となって、焼付きを起す問題があっ
た。従来の工具は、テーパ孔を旋盤によって切削して形
成するから、金型圧入時の焼付きは大きな問題になって
いる。金型の寿命延長を狙って金型の予圧を高めるに
は、テーパ孔の締め代を大きくせねばならないが、しか
し締め代が大きければ、金型の圧入時に焼付きを発生す
る問題がある。この制約があるため、金型の締め代は大
きく出来ず、予圧は上昇できないから、十分な金型の寿
命延長が出来なかった。[Problems to be solved] Since the life of the die is greatly affected by elastic deformation when the pressure of forging / pressing is repeatedly applied, the die must be pressed to withstand the pressure of forging / pressing. A high preload is applied by press-fitting into the taper hole of the reinforcing case in an interference fit state. The preload acts to cancel out the large pressure applied during forging and forging, thus extending the life of the die. Therefore, the larger the preload of the mold, the longer the life can be extended.For that purpose, the tightening margin of the taper hole is designed to be large, and the press-fitting dimension when press-fitting the mold into the taper hole is increased. I have to let you. However, when the die is pressed into the taper hole (22) from the initial insertion state to the final state shown in FIG. 2, the die peripheral surface and the inner surface of the taper hole become violently frictioned with the press-fitting, and seizure occurs. There was a problem causing. Since a conventional tool is formed by cutting a taper hole with a lathe, seizure during press-fitting of a mold has become a serious problem. In order to increase the preload of the die for the purpose of extending the life of the die, it is necessary to increase the tightening margin of the tapered hole, but if the tightening margin is large, there is a problem that seizure occurs when the die is press-fitted. Due to this restriction, the mold tightening margin cannot be increased and the preload cannot be increased, so that the life of the mold cannot be sufficiently extended.
【０００６】[0006]
【問題点を解決するための手段】本発明者は、補強ケー
スのテーパ孔へ金型を圧入する際、焼付きが生じる原因
は、テーパ孔内面の耐摩耗性が劣るためであることに気
付いた。The inventor of the present invention has found that the cause of seizure when press-fitting a die into a taper hole of a reinforcing case is that the inner surface of the taper hole has poor wear resistance. It was
【０００７】[0007]
【構成】そこで上記知見に基づいて、本発明は補強ケー
スのテーパ孔内面に耐焼付性の表面改質層を形成すると
いう簡単な手段によって、従来の技術課題を解決した。
補強ケースのテーパ孔は従来は旋削仕上げがされるだけ
で、焼付対策を施すことはなかった。本発明はテーパ孔
表面に耐焼付手段として表面改質層を施した点を特徴と
するのである。本発明は、組み工具に於て、補強ケース
のテーパ孔内面を耐焼付性の表面改質層（８）（81）に
よって被覆し、テーパ孔と金型（３）との締め代を十分
に大きく設定して、台型は金型を押上げて、金型のテー
パ周面を補強ケースのテーパ孔に圧入したものである。Therefore, based on the above knowledge, the present invention has solved the conventional technical problems by a simple means of forming a seizure resistant surface modified layer on the inner surface of the tapered hole of the reinforcing case.
Conventionally, the taper hole of the reinforcing case was only finished by turning, and no seizure countermeasure was taken. The present invention is characterized in that a surface modification layer is applied to the surface of the tapered hole as a seizure resistant means. According to the present invention, in the assembled tool, the inner surface of the tapered hole of the reinforcing case is covered with the seizure-resistant surface modification layer (8) (81) to sufficiently secure the interference between the tapered hole and the die (3). With a large setting, the trapezoidal mold is obtained by pushing up the mold and press-fitting the tapered peripheral surface of the mold into the tapered hole of the reinforcing case.
【０００８】[0008]
【作用効果】補強ケースのテーパ孔内面は、表面改質層
によって耐焼付性を著しく向上しているから、従来は到
底試みることの出来なかった大きな締め代によって、金
型をテーパ孔へ圧入することが出来、しかも金型圧入に
伴なう焼付きは起らない。金型には大きな予圧を作用さ
せることが可能であるから、金型の寿命を延長できる。[Effect] The inner surface of the taper hole of the reinforced case has a significantly improved seizure resistance due to the surface modification layer, so the die can be press-fitted into the taper hole with a large interference that could not be attempted in the past. In addition, seizure that accompanies press-fitting of the mold does not occur. Since it is possible to apply a large preload to the mold, the life of the mold can be extended.
【０００９】[0009]
【実施例】本発明は、金型を補強ケースから外して交換
できるタイプの組み工具の全てに実施出来る。発明の特
徴とする補強ケースのテーパ孔表面及び補強ケース外周
面のＴｉＣ、ＴｉＣＮ、ＴｉＮ等の表面改質層（８）
（81）は、金属組織中に浸透して一部結合しており、そ
の厚さは、５〜１０μｍであって、肉眼では寸法は判ら
ないので、説明のために誇張して図示している。The present invention can be applied to all assembling tools of the type in which the mold can be removed from the reinforcing case and replaced. A surface modification layer (8) of TiC, TiCN, TiN or the like on the surface of the tapered hole of the reinforcing case and the outer peripheral surface of the reinforcing case, which is a feature of the invention.
(81) has penetrated into the metal structure and partially bonded to it, and its thickness is 5 to 10 μm, and its dimensions cannot be seen with the naked eye. Therefore, it is exaggerated for illustration. .
【００１０】組み工具（１）は、金型（３）、該金型を
嵌着した補強ケース（２）、補強ケース（２）に収容さ
れた台型（４）、補強ケース（２）に螺合され台型
（４）を介して金型（３）の下面を支持する押上台
（５）とによって構成される。The assembling tool (1) comprises a mold (3), a reinforcing case (2) fitted with the mold, a trapezoid (4) housed in the reinforcing case (2), and a reinforcing case (2). It is constituted by a push-up base (5) which is screwed and supports the lower surface of the mold (3) through the trapezoidal mold (4).
【００１１】金型（３）は、テーパ状スリーブ（33）に
上型（31）及び下型（32）を圧入或いは焼嵌めして構成
され、交換の際は、スリーブ（33）ごと一括して交換す
る。The mold (3) is constructed by press-fitting or shrink-fitting the upper mold (31) and the lower mold (32) into the tapered sleeve (33). To replace.
【００１２】補強ケース（２）は、引張り強度が大なる
焼入れ鋼にて形成されている。The reinforcing case (2) is made of hardened steel having high tensile strength.
【００１３】又、補強ケース（２）の外周には、ブロッ
ク（６）に組み工具（１）を固定するためのクランプボ
ルト（７）が当る傾斜当り面（24）が形成されている。Further, on the outer periphery of the reinforcing case (2), there is formed an inclined contact surface (24) against which the clamp bolt (7) for fixing the assembly tool (1) to the block (6) abuts.
【００１４】補強ケース（２）の軸芯に貫通孔（21）が
開設され、該孔の上部は、外方に向って縮小したテーパ
孔（22）となり、下部はネジ孔（23）となっている。A through hole (21) is formed in the axial center of the reinforcing case (2), the upper part of the hole becomes a taper hole (22) reduced outward, and the lower part becomes a screw hole (23). ing.
【００１５】組み工具（１）の組立は、補強ケース
（２）のテーパ孔（22）に前記金型（３）を嵌め、加圧
装置（図示せず）により台型（４）の下端を加圧して金
型（３）をテーパ孔（22）に圧入し、加圧状態を保った
状態で押上台（５）を螺合し、押上台（５）を締切った
時点で、加圧装置による台型（４）への加圧を開放す
る。金型（３）及び台型（４）の中心に、ノックアウト
ピン（９）が通る孔が開設される。To assemble the assembling tool (1), the die (3) is fitted into the taper hole (22) of the reinforcing case (2), and the lower end of the trapezoidal die (4) is attached by a pressure device (not shown). Pressurize the die (3) into the taper hole (22), press the push-up base (5) into a screwed state while maintaining the pressure, and press the push-up base (5) when it is closed. The pressurization of the trapezoid (4) by the device is released. A hole through which the knockout pin (9) passes is opened in the center of the die (3) and the trapezoid (4).
【００１６】上記組み工具（１）の補強ケース（２）の
テーパ孔（22）及び外周表面に、化学蒸着（ＣＶＤ）に
よるＴｉＣ又はＴｉＣＮの層或いは物理蒸着（ＰＶＤ）
によるＴｉＮの層等の表面改質層（８）（81）を形成
し、テーパ孔表面及び補強ケースの外周面を被覆した。A TiC or TiCN layer formed by chemical vapor deposition (CVD) or physical vapor deposition (PVD) is formed on the tapered hole (22) and the outer peripheral surface of the reinforcing case (2) of the assembly tool (1).
A surface modified layer (8) (81) such as a TiN layer was formed, and the surface of the tapered hole and the outer peripheral surface of the reinforcing case were covered.
【００１７】ＴｉＣ、ＴｉＣＮ或いはＴｉＮの層は、優
れた耐焼付け性及び耐摩耗性を発揮し、補強ケース
（２）のテーパ孔（22）と金型（３）との間の締め代を
大きくして、金型（３）を安定して保持しても、金型圧
入時の補強ケース（２）と金型（３）との間の焼付きは
効果的に防止できる。又、クランプボルト（７）によっ
て工具を収容穴（61）へ強く押し付けても、焼付きは起
らない。The TiC, TiCN or TiN layer exhibits excellent seizure resistance and wear resistance, and the interference between the tapered hole (22) of the reinforcing case (2) and the die (3) is large. Then, even if the mold (3) is held stably, seizure between the reinforcing case (2) and the mold (3) during press-fitting of the mold can be effectively prevented. Further, even if the tool is strongly pressed into the accommodation hole (61) by the clamp bolt (7), seizure does not occur.
【００１８】表面改質層（８）（81）は、析出させよう
とする金属を含んだ蒸気の充満する反応室中に補強ケー
ス（２）を静置することによって行なわれるから、テー
パ孔（22）及び外周表面のみでなく、貫通孔（21）表面
及び補強ケース（２）の上下面にも付着するが、それら
は本発明の実施には支障はない。The surface modification layers (8) and (81) are formed by leaving the reinforcing case (2) stationary in the reaction chamber filled with the vapor containing the metal to be deposited. 22) and the outer peripheral surface as well as the surface of the through hole (21) and the upper and lower surfaces of the reinforcing case (2), but they do not hinder the practice of the present invention.
【図１】組み工具の斜面図である。FIG. 1 is a perspective view of an assembly tool.
【図２】組み工具の断面図である。FIG. 2 is a cross-sectional view of the assembly tool.
（１） 組み工具 （２） 補強ケース （３） 金型 （４） 台型 （５） 押上台 （６） ダイブロック (8)(81) 表面改質層 (1) Assembly tool (2) Reinforcing case (3) Mold (4) Stand (5) Push-up stand (6) Die block (8) (81) Surface modification layer
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ２３Ｃ 16/30 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location C23C 16/30
Claims (2)
を開設し、貫通孔（21）の先部には外方に向って小径化
するテーパ孔（22）を形成し、該補強ケース（２）のテ
ーパ孔（22）に、先部が小径化するテーパ周面を有する
金型（３）を嵌め、貫通孔（21）には台型（４）を摺動
可能に嵌めて金型（３）を支持せしめると共に、貫通孔
（21）内面に形成されたネジ面（23）に押上台（５）を
螺合し、該押上台（５）が台型（４）を支持している組
み工具に於て、 補強ケース（２）のテーパ孔（22）内面を耐焼付性の表
面改質層（８）（81）によって被覆し、台型（４）は金
型（３）を押上げて、金型のテーパ周面を補強ケースの
テーパ孔（22）に圧入していることを特徴とする鍛造・
圧造用組み工具。1. A through hole (21) at the center of the reinforcing case (2).
And a tapered hole (22) is formed at the tip of the through hole (21) to reduce its diameter toward the outside, and the tip of the tapered hole (22) of the reinforcing case (2) is reduced in diameter. The die (3) having a tapered peripheral surface is fitted, the trapezoidal die (4) is slidably fitted in the through hole (21) to support the die (3), and the inner surface of the through hole (21) is In the assembled tool in which the push-up base (5) is screwed onto the formed screw surface (23) and the push-up base (5) supports the trapezoidal mold (4), the taper hole of the reinforcing case (2). (22) The inner surface is coated with a seizure-resistant surface modification layer (8) (81), and the trapezoidal die (4) pushes up the die (3), and the taper peripheral surface of the die is tapered by the reinforcing case. Forging characterized by being press-fitted into the hole (22)
Assembling tool for forging.
学蒸着法或いは物理蒸着法によってテーパ孔表面に析出
したＴｉＣ、ＴｉＣＮ、ＴｉＮの何れかの層である請求
項１の組み工具。2. The seizure-resistant surface modified layer (8) (81) is a layer of any one of TiC, TiCN and TiN deposited on the surface of the tapered hole by a chemical vapor deposition method or a physical vapor deposition method. Assembly tool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6024304A JP2624624B2 (en) | 1994-02-22 | 1994-02-22 | Assembling tool for forging and forging |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6024304A JP2624624B2 (en) | 1994-02-22 | 1994-02-22 | Assembling tool for forging and forging |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07227638A true JPH07227638A (en) | 1995-08-29 |
| JP2624624B2 JP2624624B2 (en) | 1997-06-25 |
Family
ID=12134440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6024304A Expired - Fee Related JP2624624B2 (en) | 1994-02-22 | 1994-02-22 | Assembling tool for forging and forging |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2624624B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107186072A (en) * | 2017-06-13 | 2017-09-22 | 嘉兴耐思得模具科技有限公司 | A kind of cavity plate component with profiled holes and its manufacture method |
| CN108213304A (en) * | 2018-01-23 | 2018-06-29 | 重庆大学 | A kind of fist formula biomimetic features heavy-duty forging die tool and its manufacturing method |
| KR102518860B1 (en) * | 2022-07-25 | 2023-04-10 | 김재곤 | Apparatus for Manufacturing Cutting Groove of Anchor Rivet |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5519644U (en) * | 1978-07-24 | 1980-02-07 | ||
| JPS6127134A (en) * | 1984-07-18 | 1986-02-06 | Mitsui Eng & Shipbuild Co Ltd | Reinforcement feeding equipment |
| JPS6330141A (en) * | 1986-07-23 | 1988-02-08 | Aida Eng Ltd | Forging extrusion forming method |
| JPH01127122A (en) * | 1987-11-10 | 1989-05-19 | Sumitomo Electric Ind Ltd | Die for forming or coining, sizing sintered parts |
| JPH03107462A (en) * | 1989-09-21 | 1991-05-07 | Seiko Instr Inc | Die for constant-temperature forging |
| JPH04167944A (en) * | 1990-10-31 | 1992-06-16 | Japan Steel Works Ltd:The | Swage autofrettage method for thick cylindrical body |
| JPH0533933U (en) * | 1991-10-14 | 1993-05-07 | 日本ハードウエアー株式会社 | Cold forging die |
-
1994
- 1994-02-22 JP JP6024304A patent/JP2624624B2/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5519644U (en) * | 1978-07-24 | 1980-02-07 | ||
| JPS6127134A (en) * | 1984-07-18 | 1986-02-06 | Mitsui Eng & Shipbuild Co Ltd | Reinforcement feeding equipment |
| JPS6330141A (en) * | 1986-07-23 | 1988-02-08 | Aida Eng Ltd | Forging extrusion forming method |
| JPH01127122A (en) * | 1987-11-10 | 1989-05-19 | Sumitomo Electric Ind Ltd | Die for forming or coining, sizing sintered parts |
| JPH03107462A (en) * | 1989-09-21 | 1991-05-07 | Seiko Instr Inc | Die for constant-temperature forging |
| JPH04167944A (en) * | 1990-10-31 | 1992-06-16 | Japan Steel Works Ltd:The | Swage autofrettage method for thick cylindrical body |
| JPH0533933U (en) * | 1991-10-14 | 1993-05-07 | 日本ハードウエアー株式会社 | Cold forging die |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107186072A (en) * | 2017-06-13 | 2017-09-22 | 嘉兴耐思得模具科技有限公司 | A kind of cavity plate component with profiled holes and its manufacture method |
| CN108213304A (en) * | 2018-01-23 | 2018-06-29 | 重庆大学 | A kind of fist formula biomimetic features heavy-duty forging die tool and its manufacturing method |
| KR102518860B1 (en) * | 2022-07-25 | 2023-04-10 | 김재곤 | Apparatus for Manufacturing Cutting Groove of Anchor Rivet |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2624624B2 (en) | 1997-06-25 |
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| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19970128 |
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| LAPS | Cancellation because of no payment of annual fees |