JP2540236B2 - Bearing press fitting caulking device - Google Patents
Bearing press fitting caulking deviceInfo
- Publication number
- JP2540236B2 JP2540236B2 JP2268542A JP26854290A JP2540236B2 JP 2540236 B2 JP2540236 B2 JP 2540236B2 JP 2268542 A JP2268542 A JP 2268542A JP 26854290 A JP26854290 A JP 26854290A JP 2540236 B2 JP2540236 B2 JP 2540236B2
- Authority
- JP
- Japan
- Prior art keywords
- caulking
- punch
- press
- bearing
- outer casing
- 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
Landscapes
- Mounting Of Bearings Or Others (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、薄肉鋼管の端部にベアリングを圧入して、
カシメを略同時に行うことができるベアリング圧入カシ
メ装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is characterized in that a bearing is press-fitted into an end portion of a thin-walled steel pipe,
The present invention relates to a bearing press-fit caulking device capable of caulking substantially simultaneously.
従来より、薄肉鋼管端にベアリングを圧入してカシメ
を行う技術は存在している。その装置によれば、圧入装
置によりベアリングを圧入し、また、別のカシメ装置に
より薄肉鋼管のベアリング圧入開口部をカシメする。即
ち、圧入装置とカシメ装置との２台が必要とされてい
た。Conventionally, there has been a technique of press-fitting a bearing at the end of a thin-walled steel pipe to perform crimping. According to the device, the bearing is press-fitted by the press-fitting device, and the bearing press-fitting opening portion of the thin-walled steel pipe is caulked by another caulking device. That is, two units, a press-fitting device and a caulking device, were required.
ところで、圧入とカシメとを別々の機械又は装置によ
ると、作業時間がかかり、製造効率が悪く、しかも高精
度が期待できないこともあり、さらには設備費用がかか
り、設置スペースを多く必要とする欠点があった。By the way, if the press-fitting and the caulking are performed by separate machines or devices, it takes a lot of work time, the manufacturing efficiency is poor, and high precision may not be expected. Furthermore, the facility cost is high and a lot of installation space is required. was there.
そこで発明者は、前記課題を解決すべく、鋭意，研究
を重ねた結果、その発明を、薄肉鋼管を、この軸心上に
ベアリング圧入用のパンチ本体と対向配置するように設
け、該パンチ本体は流体圧シリンダのシリンダロッド端
に固着したパンチ外筺内に圧縮バネを介して摺動可能に
弾設し、前記パンチ外筺にカシメ具支持筺体を遊挿支持
し、該カシメ具支持筺体内に複数のカシメ爪を揺動可能
に設け、該カシメ爪は前記パンチ外筺の下降で且つカシ
メ具支持筺体の下降停止を条件としてその複数のカシメ
爪の下端が互いに窄まるようにしたベアリング圧入カシ
メ装置としたことにより、薄肉鋼管の端部にベアリング
を圧入して、カシメを略同時に行うことができ、前記課
題を解決したものである。Therefore, as a result of earnestly researching to solve the above-mentioned problems, the inventor has provided the invention with a thin-walled steel pipe provided on the axial center of the punched body so as to face the punch body for bearing press-fitting. Is slidably installed in the punch outer casing fixed to the cylinder rod end of the fluid pressure cylinder through a compression spring, and the crimping tool supporting casing is loosely inserted and supported in the punch outer casing. A plurality of caulking claws are swingably provided on the base of the punch outer casing. By using the caulking device, the bearing can be press-fitted into the end portion of the thin-walled steel pipe and caulking can be performed substantially at the same time, which solves the above problem.
以下、本発明の実施例を第１図乃至第10図に基づいて
説明する。An embodiment of the present invention will be described below with reference to FIGS. 1 to 10.
第１図は本発明の装置の全体を示す断面図である。１
は機枠、２は固定具であって、ステアリングコラム等の
薄肉鋼管Ａの管端を包持するようにして固定する。この
固定具２では、第５図に示すように、円形状の薄肉鋼管
Ａの外周を３分割し、この２つの箇所を、ブロック片状
の支持部2a,2aにて支持し、他方の１個所は、水平面上
を回転可能なクランプ2bが設けられ、該クランプ2bの先
端と支持部2a,2aとで薄肉鋼管Ａが垂直状に支持固定さ
れる。FIG. 1 is a sectional view showing the entire apparatus of the present invention. 1
Is a machine frame, and 2 is a fixture that fixes the steering column or the like so as to enclose the pipe end of the thin-walled steel pipe A. In this fixture 2, as shown in FIG. 5, the outer circumference of a circular thin-walled steel pipe A is divided into three parts, and these two points are supported by block-shaped support parts 2a, 2a, and the other one A clamp 2b rotatable on a horizontal plane is provided at a position, and the thin steel pipe A is vertically supported and fixed by the tip of the clamp 2b and the supporting portions 2a, 2a.
３はパンチ外筺であって、第２図に示すように、内部
の下方を開口し、且つ上下方向を向く円柱状の空隙部3a
が形成され、パンチ外筺３の下端外周には、この外径よ
りも大径となる鍔部3bが形成されている。この空隙部3a
内には、この軸方向と同方向を向くパンチ本体４の大径
部4aが収納されて、上下方向に摺動可能に構成されてい
る。具体的には、そのパンチ本体４の大径部4aは筒状を
なし、前記空隙部3a内に収納され且つ適宜摺動可能に設
けられている。その大径部4aの内部は、上方に開口した
中空円柱状のバネ収納穴部4a1が形成されている。その
大径部4aの下端のパンチ部4bは、前記大径部4aの径より
小径となり、前記パンチ外筺３の下端よりもさらに下端
側に突出形成されている。そのパンチ部4bの下端は、パ
ンチ部先端小径筒部4b1とパンチ面4b2とで構成されてい
る。また、パンチ部4bの内部は下方に開口した穴部4b3
が形成されている。さらに、パンチ外筺３の軸心には、
軸杆５が垂設され、該軸杆５は上端はパンチ外筺３の内
部に固定され、その軸杆５の下端側は空隙部3a及びパン
チ本体４を縦貫してその下端の膨出部5aが前記穴部4b3
内に存在し、パンチ本体４を支えるように構成されてい
る。このように、該パンチ本体４は、軸杆５の軸方向上
（上下方向）を摺動（昇降）可能に設けられ、且つその
パンチ外筺３の空隙部3a内部上面とパンチ本体４上部の
バネ収納穴部4a1との間に圧縮コイルスプリング等の圧
縮バネ６が介在されている。これによって、パンチ本体
４は常時下方に弾発するように構成されている。Reference numeral 3 denotes a punch outer casing, and as shown in FIG. 2, a column-shaped void portion 3a that opens downward in the inside and faces in the vertical direction.
Is formed on the outer periphery of the lower end of the punch outer casing 3, and a flange portion 3b having a diameter larger than this outer diameter is formed. This void 3a
A large-diameter portion 4a of the punch body 4 that faces the same direction as the axial direction is housed therein and is configured to be slidable in the vertical direction. Specifically, the large-diameter portion 4a of the punch body 4 has a tubular shape, is accommodated in the void 3a, and is slidably provided. Inside the large diameter portion 4a, a hollow cylindrical spring accommodating hole portion 4a 1 opening upward is formed. The punch portion 4b at the lower end of the large diameter portion 4a has a diameter smaller than the diameter of the large diameter portion 4a, and is formed so as to project further to the lower end side than the lower end of the punch outer casing 3. The lower end of the punch portion 4b is composed of a punch portion tip small diameter cylinder portion 4b 1 and a punch surface 4b 2 . In addition, the inside of the punch portion 4b has a hole portion 4b 3 opened downward.
Are formed. Furthermore, the axis of the punch outer casing 3
A shaft rod 5 is vertically installed, the shaft rod 5 has an upper end fixed inside the punch outer casing 3, and a lower end side of the shaft rod 5 penetrates the void 3a and the punch body 4 and a bulge portion at the lower end thereof. 5a is the hole 4b 3
It exists inside and is configured to support the punch body 4. In this way, the punch main body 4 is provided so as to be slidable (movable up and down) in the axial direction (vertical direction) of the shaft rod 5, and the upper surface of the inside of the void 3a of the punch outer casing 3 and the upper part of the punch main body 4 are arranged. compression spring 6 such as a compression coil spring between the spring receiving hole portion 4a 1 is interposed. As a result, the punch body 4 is configured to always spring downward.
７はカシメ具支持筺体で、第２図に示すように、前記
鍔部3bを包囲する形状をなし、筒状部7aと、この上端に
設けた円板状の上部環状支持板7bと、その筒状部7aの下
端に形成した下部環状支持板7cとから構成されている。
この状態で前記鍔部3bを、筒状部7a,上部環状支持板7b,
下部環状支持板7cとで包囲形成し、常時は、鍔部3bの上
面に上部環状支持板7bが重合されつつカシメ具支持筺体
７が遊挿状態にて支持されている。Reference numeral 7 denotes a caulking tool support housing, which has a shape surrounding the brim portion 3b as shown in FIG. 2, and has a cylindrical portion 7a and a disk-shaped upper annular support plate 7b provided at the upper end thereof. It is composed of a lower annular support plate 7c formed at the lower end of the tubular portion 7a.
In this state, the collar portion 3b, the tubular portion 7a, the upper annular support plate 7b,
It is surrounded by the lower annular support plate 7c, and normally, the upper annular support plate 7b is superposed on the upper surface of the flange 3b while the caulking tool support housing 7 is supported in a loosely inserted state.
８はカシメ爪で、側面から見てＬ形状をなし、前記カ
シメ具支持筺体７の内部に軸支されている。具体的に
は、そのカシメ爪８は、第３図に示すように、本発明で
は４つ設けられ、これが等角度を有して軸支されてい
る。また、カシメ具支持筺体７内に略三角形状の軸受部
９が４箇所設けられ、この隣接する軸受部9,9間にカシ
メ爪８の軸片10が軸支されている。Reference numeral 8 denotes a crimping nail, which is L-shaped when viewed from the side and is pivotally supported inside the crimping tool support housing 7. Specifically, as shown in FIG. 3, the caulking claws 8 are provided in the present invention, and four of them are pivotally supported at equal angles. Further, four substantially triangular bearing parts 9 are provided in the caulking tool support housing 7, and a shaft piece 10 of the caulking claw 8 is pivotally supported between the adjacent bearing parts 9, 9.
そのカシメ爪８は、前記パンチ外筺３の鍔部3bの下面
側に設けた突条3cの下降にてカシメ爪８の上部端の押圧
部8aを押圧し、下部のカシメ部8bを互いに内方に揺動さ
せるものである（第８図，第９図参照）。The caulking claw 8 presses the pressing part 8a at the upper end of the caulking claw 8 when the protrusion 3c provided on the lower surface side of the collar part 3b of the punch outer casing 3 is pushed down, and the lower caulking part 8b is inserted inside each other. It is rocked in one direction (see FIGS. 8 and 9).
11は油圧又は空圧等の流体圧シリンダで、前記枠１の
上部に垂設され、このシリンダロッド11aの下端に前記
パンチ外筺３の上部及び軸杆５の上端が固着されてい
る。Reference numeral 11 denotes a hydraulic cylinder such as hydraulic pressure or pneumatic pressure, which is vertically provided on the upper portion of the frame 1, and the upper end of the punch outer casing 3 and the upper end of the shaft rod 5 are fixed to the lower end of the cylinder rod 11a.
図中12は位置規制部材で、カシメ具支持筺体７の下降
を停止するように、前記薄肉鋼管Ａに対して両側に対向
して設けられている。A1は窪み部で、ベアリングＢの圧
入をストップさせるために、圧入前に、前記薄肉銅管Ａ
の端部箇所に設けられている。In the figure, reference numeral 12 is a position restricting member which is provided on both sides of the thin steel pipe A so as to stop the descending of the caulking tool support housing 7. A 1 is a dent, which is used to stop the press-fitting of the bearing B.
It is provided at the end of the.
まず、本発明によれば、まず、薄肉鋼管Ａを機枠１に
設けた固定具２でセットし、第６図実線位置の状態にお
いて、そのパンチ本体４の下端のパンチ部先端小径筒部
4b1にベアリングＢの内輪を挿入する。この挿入力で落
下しないようになっている。次いで、第６図実線位置よ
り、流体圧シリンダ11を配給油してシリンダロッド11a
を下降させ、この下降と共に、パンチ外筺３及びパンチ
本体４を下降させる。そして、ベアリングＢの外輸端を
薄肉鋼管Ａの上端周縁に当接する（第６図鎖線参照）。
さらに下降させると、その圧縮バネ６を介してパンチ本
体４でベアリングＢを圧入する。この圧入はあくまでも
圧縮バネ６の弾発力に抗しての力で行われる。ベアリン
グ圧入用のパンチ本体４が薄肉鋼管Ａの端部内に入り、
ベアリングＢの圧入工程が完了すると（第７図参照）、
このとき、カシメ具支持筺体７が位置規制部材12に当接
し、カシメ具支持筺体７及びカシメ爪8,8,…は下方向に
停止状態となる（第７図参照）。さらに、シリンダロッ
ド11a,パンチ外筺３を下降すると、今度は、そのパンチ
外筺３の突条3cにてカシメ爪８の押圧部8aが押圧され、
そのカシメ爪８が揺動してカシメ部8bにて薄肉鋼管Ａの
最上端の薄肉円筒状部のカシメ作用を完了する（第８図
乃至第10図参照）。First, according to the present invention, first, the thin steel pipe A is set by the fixture 2 provided on the machine frame 1, and in the state of the solid line position in FIG.
Insert the inner ring of bearing B into 4b 1 . This insertion force prevents it from falling. Then, from the position shown by the solid line in FIG.
And the punch outer casing 3 and the punch main body 4 are lowered at the same time. Then, the outer end of the bearing B is brought into contact with the upper edge of the thin steel pipe A (see the chain line in FIG. 6).
When it is further lowered, the bearing B is press-fitted by the punch main body 4 via the compression spring 6. This press-fitting is performed by a force that resists the elastic force of the compression spring 6. The punch body 4 for press-fitting the bearing enters the end of the thin-walled steel pipe A,
When the press-fitting process of the bearing B is completed (see FIG. 7),
At this time, the caulking tool support housing 7 comes into contact with the position restricting member 12, and the caulking tool support housing 7 and the caulking claws 8, 8, ... Are stopped in the downward direction (see FIG. 7). Further, when the cylinder rod 11a and the punch casing 3 are lowered, this time, the pressing portion 8a of the crimping claw 8 is pushed by the protrusion 3c of the punch casing 3,
The caulking claw 8 swings and the caulking portion 8b completes the caulking action of the thin-walled cylindrical portion at the uppermost end of the thin-walled steel pipe A (see FIGS. 8 to 10).
本発明においては、薄肉鋼管Ａを、この軸心上にベア
リング圧入用のパンチ本体４と対向配置するように設
け、そのパンチ本体４は流体圧シリンダ11のシリンダロ
ッド11a端に固着したパンチ外筺３内に圧縮バネ６を介
して摺動可能に弾設し、前記パンチ外筺３にカシメ具支
持筺体７を遊挿支持し、該カシメ具支持筺体７内に複数
のカシメ爪8,8,…を揺動可能に設け、該カシメ爪8,8,…
は前記パンチ外筺３の下降で且つカシメ具支持筺体７の
下降停止を条件としてその複数のカシメ爪8,8,…の下端
が互いに窄まるようにしたベアリング圧入カシメ装置と
したことにより、第１に圧入とカシメ作業とを同時に行
うことができ、第２に作業時間を低減し、ひいては製造
効率の向上を図り、第３に設備費用の軽減化もでき、第
４に極めて良好な状態にてカシメ作業ができる等の効果
を奏する。In the present invention, the thin-walled steel pipe A is provided on the axial center so as to face the punch body 4 for press-fitting the bearing, and the punch body 4 is fixed to the end of the cylinder rod 11a of the fluid pressure cylinder 11. 3 is slidably provided in the punch outer casing 3 via a compression spring 6, and the punching outer casing 3 supports the crimping tool supporting housing 7 by loose insertion, and a plurality of crimping claws 8, 8, The rocking claws 8,8, ...
Is a bearing press-fitting caulking device in which the lower ends of the plurality of caulking claws 8, 8, ... Are narrowed to each other on condition that the punch outer casing 3 descends and the caulking tool supporting casing 7 stops descending. 1 can perform press-fitting and caulking work at the same time, 2) work time can be shortened, manufacturing efficiency can be improved, 3) equipment cost can be reduced, and 4) very good condition. There is an effect that caulking work can be performed.
これらの効果について詳述すると、まず、圧入とカシ
メ作業とを同一の機械にて略同時に行うことができ、従
来のように圧入とカシメ作業とを別々に行っていたのと
は格段と能率的で且つ製造効率を上昇させることができ
る。Explaining these effects in detail, first, press-fitting and caulking work can be performed at the same time on the same machine, which is far more efficient than performing press-fitting and caulking work separately. In addition, manufacturing efficiency can be increased.
また、パンチ本体４は流体圧シリンダ11のシリンダロ
ッド11a端に固着したパンチ外筺３内に摺動可能に設
け、該パンチ外筺３とパンチ本体４とを圧縮バネ６を介
して弾設したので、ベアリング圧入する力は、流体圧シ
リンダ11の力ではなく、圧縮バネ６に反発する力であ
り、そのバネの所定の反発力を利用することから、常時
一定の圧入力に圧入することができ、ひいては良好に圧
入作業ができる。Further, the punch main body 4 is slidably provided in the punch outer casing 3 fixed to the end of the cylinder rod 11a of the fluid pressure cylinder 11, and the punch outer casing 3 and the punch main body 4 are elastically mounted via a compression spring 6. Therefore, the force for press-fitting the bearing is not the force of the fluid pressure cylinder 11, but the force for repelling the compression spring 6, and since a predetermined repulsive force of the spring is used, it is possible to always press-fit a constant pressure input. Therefore, the press-fitting work can be performed well.
次に、パンチ外筺３にカシメ具支持筺体７を遊挿支持
し、該カシメ具支持筺体７内に複数のカシメ爪8,8,…を
揺動可能に設け、該カシメ爪8,8,…は前記パンチ外筺３
の下降で且つカシメ具支持筺体７の下降停止を条件とし
てその複数のカシメ爪8,8,…の下端が互いに窄まるよう
にしたことにより、カシメ作業は極めて良好なる状態に
できる。Next, the caulking tool support housing 7 is loosely inserted and supported on the punch outer housing 3, and a plurality of caulking nails 8, 8, ... Is swingably provided in the caulking tool supporting housing 7, and the caulking nails 8, 8, ... is the punch outer casing 3
By lowering the lower ends of the plurality of caulking claws 8, 8 on the condition that the caulking tool support housing 7 is stopped to descend, caulking work can be performed in a very good state.
また、本発明では従来とは異なり、同一取付固定状態
によりベアリングＢの圧入、カシメを行うため、圧入後
の、カシメによるベアリングＢの同軸芯となり（圧入時
の軸芯とカシメ時の軸芯とが同一）、均等なる押圧力に
てカシメ作業ができ、ベアリングＢが受ける偏荷重を殆
どなくすことができる。Further, unlike the conventional case, in the present invention, the bearing B is press-fitted and crimped by the same mounting and fixing state. Therefore, after the press-fitting, the bearing B becomes the coaxial core of the bearing B (the press-fitted shaft core and the crimped shaft core are However, the caulking work can be performed with an even pressing force, and an unbalanced load applied to the bearing B can be almost eliminated.
以上のように、圧入とカシメ作業とを同時にできるの
みならず、これが簡易且つ迅速にできることの外に、従
来のように２台ではなく、本発明のように２台を１台と
することから、スペースも空き、ひいては設備投資も最
小にできる利点がある。As described above, not only the press-fitting and the caulking work can be performed at the same time, but also this can be performed simply and quickly. In addition to the conventional two units, the two units are one unit according to the present invention. There is an advantage that space can be vacated, and eventually capital investment can be minimized.
図面は本発明の実施例を示すもので、第１図は本発明の
一部断面とした正面図、第２図は本発明の一部切除した
要部斜視図、第３図はカシメ爪箇所の横断平面図、第４
図は第３図の要部斜視図、第５図は固定具箇所の一部断
面とした平面図、第６図乃至第９図は本発明の作用状態
を示す断面図、第10図は薄肉鋼管端にベアリングを圧入
してカシメを完了した状態の斜視図である。 Ａ……薄肉鋼管、３……パンチ外筺、 ４……パンチ本体、６……圧縮バネ、 ７……カシメ具支持筺体、８……カシメ爪、 11……流体圧シリンダ、11a……シリンダロッド。The drawings show the embodiments of the present invention. FIG. 1 is a front view showing a partial cross section of the present invention, FIG. 2 is a perspective view of a part of the present invention with a part cut away, and FIG. Cross-sectional plan view of the fourth
FIG. 5 is a perspective view of an essential part of FIG. 3, FIG. 5 is a plan view showing a partial cross section of a fixture part, FIGS. 6 to 9 are sectional views showing the working state of the present invention, and FIG. It is a perspective view of a state where a bearing is press-fitted to the end of the steel pipe and caulking is completed. A: thin-walled steel pipe, 3 ... punch outer casing, 4 ... punch body, 6 ... compression spring, 7 ... caulking tool support casing, 8 ... crimping claw, 11 ... fluid pressure cylinder, 11a ... cylinder rod.
Claims (1)
用のパンチ本体と対向配置するように設け、該パンチ本
体は流体圧シリンダのシリンダロッド端に固着したパン
チ外筺内に圧縮バネを介して摺動可能に弾設し、前記パ
ンチ外筺にカシメ具支持筺体を遊挿支持し、該カシメ具
支持筺体内に複数のカシメ爪を揺動可能に設け、該カシ
メ爪は前記パンチ外筺の下降で且つカシメ具支持筺体の
下降停止を条件としてその複数のカシメ爪の下端が互い
に窄まるようにしたことを特徴としたベアリング圧入カ
シメ装置。1. A thin-walled steel pipe is provided on this shaft center so as to be opposed to a punch main body for press-fitting a bearing, and the punch main body has a compression spring in a punch outer casing fixed to a cylinder rod end of a fluid pressure cylinder. Slidably through the punch outer casing, the caulking tool support housing is loosely inserted and supported in the punch outer housing, and a plurality of caulking claws are swingably provided in the caulking tool support housing. 1. A bearing press-fit caulking device characterized in that the lower ends of a plurality of caulking claws are constricted to each other when the housing is lowered and the lowering of the caulking tool support housing is stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2268542A JP2540236B2 (en) | 1990-10-08 | 1990-10-08 | Bearing press fitting caulking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2268542A JP2540236B2 (en) | 1990-10-08 | 1990-10-08 | Bearing press fitting caulking device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04145228A JPH04145228A (en) | 1992-05-19 |
| JP2540236B2 true JP2540236B2 (en) | 1996-10-02 |
Family
ID=17459977
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2268542A Expired - Lifetime JP2540236B2 (en) | 1990-10-08 | 1990-10-08 | Bearing press fitting caulking device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2540236B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19602895B4 (en) * | 1996-01-27 | 2006-05-11 | Pierburg Gmbh | Tool for generating a bearing assembly for an electric motor |
| JP4549058B2 (en) * | 2003-12-26 | 2010-09-22 | 株式会社三五 | Method for manufacturing column holding device |
| KR100983206B1 (en) * | 2008-05-23 | 2010-09-20 | (주)금아플로우 | Producing Method for Pipe with Check Valve for Automobile Power Steering and Pipe Produced by said Method |
| CN113976701A (en) * | 2021-10-26 | 2022-01-28 | 东风柳州汽车有限公司 | Bearing pressure riveting edge equipment |
| CN114406109B (en) * | 2022-02-16 | 2024-05-24 | 山东华钢精密轴承制造有限公司 | Riveting device for thrust bearing retainer |
-
1990
- 1990-10-08 JP JP2268542A patent/JP2540236B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04145228A (en) | 1992-05-19 |
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