JP2907484B2 - Assembled reaction plate - Google Patents
Assembled reaction plateInfo
- Publication number
- JP2907484B2 JP2907484B2 JP2092599A JP9259990A JP2907484B2 JP 2907484 B2 JP2907484 B2 JP 2907484B2 JP 2092599 A JP2092599 A JP 2092599A JP 9259990 A JP9259990 A JP 9259990A JP 2907484 B2 JP2907484 B2 JP 2907484B2
- Authority
- JP
- Japan
- Prior art keywords
- iron plate
- saddle
- plate
- coil
- shaped
- 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
- Control Of Vehicles With Linear Motors And Vehicles That Are Magnetically Levitated (AREA)
- Linear Motors (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は片側式リニアインダクションモータ(LIM)
に用いるリアクションプレートに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a single-sided linear induction motor (LIM).
The present invention relates to a reaction plate used for the above.
従来、片側式リニアインダクションモータは、第6図
に断面図として示すように、例えば車軸15に車上界磁13
を取り付け、一方、鉄板11上にアルミ板を圧着した合板
からなるリアクションプレートを地上側に固定して車上
界磁13と数mm〜10数mmの間隔で対向させ、第7図に示す
ように車上界磁に対してVVVF(可変電圧可変周波数)イ
ンバータ16により各車上界磁に対して三相電圧を供給し
て移動磁界を発生させ、リアクションプレートに生ずる
渦電流との相互作用でリアクションプレートに長手方向
に力を発生させ、その反力で車上界磁に推進力を発生さ
せている。VVVFインバータ16はスタート時は周波数を低
くして大きい電流を流すとともに、電圧を下げ、高速に
なるにつれて周波数を上げるようにして車体推進力のコ
ントロールをしている。Conventionally, a one-sided linear induction motor has, for example, a
On the other hand, a reaction plate composed of a plywood obtained by pressing an aluminum plate on an iron plate 11 is fixed to the ground side and opposed to the vehicle field 13 at a distance of several mm to several tens mm, as shown in FIG. In response to the on-vehicle field, a VVVF (variable voltage variable frequency) inverter 16 supplies a three-phase voltage to each on-vehicle field to generate a moving magnetic field, which interacts with the eddy current generated on the reaction plate. A force is generated in the reaction plate in the longitudinal direction, and the reaction force generates a propulsive force in the on-vehicle field. At the start, the VVVF inverter 16 controls the vehicle propulsion by lowering the frequency and allowing a large current to flow, lowering the voltage, and increasing the frequency as the speed increases.
このような従来のリアクションプレートは、磁束を通
し易くするための鉄板上に、渦電流損の少ないアルミ板
を圧着した構造になっており、鉄板とアルミ板との熱膨
張率の差により両端に反りが発生するという問題があ
る。Such a conventional reaction plate has a structure in which an aluminum plate with a small eddy current loss is crimped on an iron plate to facilitate the passage of magnetic flux, and at both ends due to the difference in the coefficient of thermal expansion between the iron plate and the aluminum plate. There is a problem that warpage occurs.
また、アルミ板の厚さだけ車上界磁との間の磁路が増
して磁気抵抗が大きくなってしまうので、車上界磁とリ
アクションプレートの間の空隙を10mm程度と小さくしな
ければならない。In addition, the magnetic path between the on-vehicle field and the on-vehicle field increases due to the thickness of the aluminum plate, increasing the magnetic resistance.Therefore, the gap between the on-vehicle field and the reaction plate must be reduced to about 10 mm. .
さらに、車上界磁とリアクションプレート間には、特
に低速時に大きな電磁力が吸引力として発生するが第6
図に示すようにリアクションプレートの幅は渦電流路を
形成させるために車上界磁の鉄心14の巾より左右に界磁
巻線の幅(図のd)分だけはみ出させており、そのため
車体が左右に多少振れても車上界磁とリアクションプレ
ート間に働く電磁力は垂直方向成分のみであるため、中
心位置へ戻す案内力として利用することができない。Furthermore, a large electromagnetic force is generated as an attractive force between the on-vehicle field and the reaction plate, especially at low speed.
As shown in the figure, the width of the reaction plate protrudes from the width of the on-vehicle field iron core 14 to the left and right by the width of the field winding (d in the figure) in order to form an eddy current path. Even if it is slightly swung to the left and right, the electromagnetic force acting between the on-vehicle field and the reaction plate is only a vertical component, and cannot be used as a guide force for returning to the center position.
本発明は上記課題を解決するためのもので、リアクシ
ョンプレートに反りを発生させず、車上界磁とリアクシ
ョンプレート間の間隙を大きくすることができるととも
に、車上界磁とリアクションプレート間の電磁力を案内
力として利用できるようにした組立式リアクションプレ
ートを提供することを目的とする。SUMMARY OF THE INVENTION The present invention is directed to solving the above-described problem, and it is possible to increase a gap between a vehicle-mounted field and a reaction plate without causing a warp in a reaction plate, and to reduce an electromagnetic force between a vehicle-mounted field and a reaction plate. It is an object of the present invention to provide an assembling reaction plate in which force can be used as a guiding force.
そのために本発明の組立式リアクションプレートは、
コイル位置決め用鉄板が取り付けられた長尺鉄板と、長
尺鉄板上に取り付けられた互いに短辺長さの異なる2種
類の鞍形矩形コイルと、鞍形矩形コイルの長尺鉄板上の
導体部間に配置され、鞍形矩形コイルを締め付ける締め
付け用鉄板とを有し、前記2種類の鞍形コイルは、鉄板
上の導体部が等間隔で配置されるとともに、導体部間に
鉄板が配置されることを特徴とする。Therefore, the assembly type reaction plate of the present invention is
A long iron plate on which a coil positioning iron plate is mounted, two types of saddle-shaped rectangular coils mounted on the long iron plate, each having a different short side length, and a conductor portion on the long iron plate of the saddle-shaped rectangular coil And a tightening iron plate for tightening the saddle-shaped rectangular coil. In the two types of saddle-shaped coils, the conductors on the iron plate are arranged at equal intervals, and the iron plate is arranged between the conductors. It is characterized by the following.
本発明は中を矩形に打ち抜いた矩形単コイルの縦辺を
直角に折った形状で、横辺の長さが互いに異なる2種類
の鞍形コイルを長尺の鉄板(鉄心)の上に組み合わせて
取り付け、さらに矩形単コイルの鉄板上の導体間に鉄板
を入れて締結することにより、リアクションプレート面
に鉄板と導体とを交互に露出させるようにし、直接鉄板
を通して磁束を通すようにするとともに、鞍形コイルで
渦電流路を規定することにより、温度変化による反りの
発生を防止し、車上界磁とリアクションプレート間の空
隙を大きくできるとともに、車上界磁の鉄心とリアクシ
ョンプレートの鉄心部の巾を同じにできるので案内力を
発生させることができる。The present invention is a rectangular single coil formed by punching the inside into a rectangular shape, in which the vertical sides are bent at right angles, and two types of saddle coils having different horizontal sides are combined on a long iron plate (iron core). By attaching the iron plate between the conductors on the iron plate of the rectangular single coil and fastening it, the iron plate and the conductor are alternately exposed on the reaction plate surface, the magnetic flux passes directly through the iron plate, and the saddle By defining the eddy current path with the shaped coil, it is possible to prevent the occurrence of warpage due to temperature changes, to increase the gap between the on-vehicle field and the reaction plate, and to increase the distance between the on-vehicle field core and the reaction plate core. Since the width can be the same, a guiding force can be generated.
以下、実施例を図面を参照して説明する。 Hereinafter, embodiments will be described with reference to the drawings.
第1図、第2図は第1、第2の鞍形コイルを示す図
で、それぞれ同図(a)は平面図、同図(b)は正面
図、同図(c)は側面図、同図(d)は斜視図、第3図
は長尺の鉄板構造を示す図で、同図(a)は平面図、同
図(b)は正面図、同図(c)は側面図、同図(d)は
斜視図、第4図はコイル締め付け用鉄板を示す図で、同
図(a)は平面図、同図(b)は正面図、第5図は組み
立てたリアクションプレートを示す図で、同図(a)は
平面図、同図(b)は正面図、同図(c)は側面図、同
図(d)は斜視図である。図中、1は第1の鞍形コイ
ル、2は第2の鞍形コイル、3は長尺の鉄板、4は位置
決め用鉄板、5は鞍形コイル締め付け用鉄板、6は形鋼
である。1 and 2 are views showing first and second saddle coils, respectively. FIG. 1 (a) is a plan view, FIG. 1 (b) is a front view, FIG. 1 (c) is a side view, 3 (d) is a perspective view, FIG. 3 is a view showing a long iron plate structure, FIG. 3 (a) is a plan view, FIG. 3 (b) is a front view, FIG. 3 (c) is a side view, 4 (d) is a perspective view, FIG. 4 is a view showing an iron plate for coil fastening, FIG. 4 (a) is a plan view, FIG. 4 (b) is a front view, and FIG. 5 shows an assembled reaction plate. 5A is a plan view, FIG. 5B is a front view, FIG. 5C is a side view, and FIG. 5D is a perspective view. In the drawing, 1 is a first saddle coil, 2 is a second saddle coil, 3 is a long iron plate, 4 is an iron plate for positioning, 5 is an iron plate for tightening the saddle coil, and 6 is a section steel.
第1図、第2図に示すように第1、第2の鞍形コイル
1、2は、例えば矩形のAl製板の中を矩形に打ち抜き、
その縦辺1a、2aをそれぞれ直角に折り曲げて鞍形にした
形の単コイルであり、縦辺1a、2aの長さはlで互いに等
しく、コイル1の横辺1bの内法寸法w2が、コイル2の横
辺2bの外法寸法w3にほぼ等しくなっている。As shown in FIGS. 1 and 2, the first and second saddle coils 1 and 2 are formed by, for example, punching a rectangular aluminum plate into a rectangular shape.
It is a single coil in which the vertical sides 1a and 2a are each bent at a right angle to form a saddle shape. The lengths of the vertical sides 1a and 2a are equal to each other, and the inner dimension w 2 of the horizontal side 1b of the coil 1 is , it is approximately equal to the external dimensions w 3 of the lateral sides 2b of the coil 2.
また、第3図に示すように鞍形コイル1、2が取り付
けられる長尺の鉄板(鉄心)3は下面の両側に形鋼6を
取り付けて補強し、軌道に締結する。また鉄板3の上面
には鉄板3の幅w5と同じ長さのコイル位置決め用の鉄板
4がボルト締め等適宜の方法で等間隔に取り付けられ、
鉄板4の1つおきの内法間隔はコイル1、2の縦辺の長
さlに等しくなっている。また鉄板3の幅w5はコイル2
の横辺2bの内法寸法w4にほぼ等しくなっている。As shown in FIG. 3, a long iron plate (iron core) 3 to which the saddle coils 1 and 2 are attached is reinforced by attaching a shape steel 6 on both sides of the lower surface and fastened to a track. Also on the upper surface of the steel plate 3 iron plate 4 for coil positioning of the same length as the width w 5 of the steel plate 3 is mounted at equal bolting or the like proper method,
Every other inner spacing of the iron plate 4 is equal to the length l of the vertical sides of the coils 1 and 2. The width w 5 of the iron plate 3 is coil 2
It is approximately equal to the horizontal side 2b inner dimension w 4 of the.
また、第4図に示すようにコイル1、2の締めつけ用
鉄板5は幅w6がコイル1の横辺1bの外法寸法w1とほぼ等
しい。In addition, as shown in FIG. 4, the iron plate 5 for tightening the coils 1 and 2 has a width w 6 substantially equal to the outer dimension w 1 of the side 1 b of the coil 1.
なお、コイル1、2の厚みt、コイル位置決め用鉄板
4の厚みt、コイル締結め付け用鉄板の厚みtは互いに
等しくしてあり、また、コイル1、2の横辺の導体部の
幅w、コイル位置決め用鉄板4の幅w、コイル締め付け
用鉄板の幅wも互いにほぼ等しくしている。The thickness t of the coils 1 and 2, the thickness t of the coil positioning iron plate 4, and the thickness t of the coil fastening iron plate are equal to each other, and the width w of the conductor on the side of the coils 1 and 2. The width w of the coil positioning iron plate 4 and the width w of the coil fastening iron plate are also substantially equal to each other.
次に、リアクションプレートの組み立てについて第5
図により説明する。Next, about the assembly of the reaction plate, the fifth
This will be described with reference to the drawings.
鞍形コイル1及び2の長尺鉄板3への取り付けは、横
辺の導体部が等間隔で配置されるようにする。すなわ
ち、第5図(d)の斜視図で分かるように、まづ長尺の
鉄板3の上面に鞍形コイル2を取り付ける。このとき、
鞍形コイル2の縦辺の長さlはコイル位置決め用鉄板4
の1つおきの内法間隔lに等しいので、1つおきの鉄板
4の間にすっぽりと嵌まる。そして、第5図(a)に示
すように鞍形コイル2−1、2−2、2−3、2−4…
…というように順次位置決め用鉄板を介在させて取り付
ける。次に、第5図(d)の斜視図で分かるように、隣
り合う鞍形コイル2に跨るように鞍形コイル1を取り付
ける。この場合も鞍形コイル1の縦辺の長さlはコイル
位置決め用鉄板4の1つおきの内法間隔lに等しいの
で、1つおきの鉄板4の間にすっぽりと嵌まることにな
る。そして、同様に第5図(a)に示すように鞍形コイ
ル1−1、1−2、1−3、1−4……というように順
次位置決め用鉄板を介在させて取り付ける。こうして取
り付けると鉄板上の2つの鞍形コイルの導体部が等間隔
になるとともに、導体部間の間隔も導体の巾にほぼ等し
くなる。また、鞍形コイル1及び2の折曲げられた縦辺
の導体部1a、2aは鉄板の側面上で重なるように配置され
る。The saddle-shaped coils 1 and 2 are attached to the long iron plate 3 so that the conductors on the horizontal sides are arranged at equal intervals. That is, as can be seen from the perspective view of FIG. 5 (d), the saddle-shaped coil 2 is first mounted on the upper surface of the long iron plate 3. At this time,
The length l of the vertical side of the saddle coil 2 is the iron plate 4 for coil positioning.
Since it is equal to every other inner spacing l, it fits perfectly between every other iron plate 4. Then, as shown in FIG. 5 (a), saddle-shaped coils 2-1, 2-2, 2-3, 2-4,.
And so on, with the positioning iron plate interposed in sequence. Next, as can be seen from the perspective view of FIG. 5 (d), the saddle-shaped coil 1 is attached so as to straddle the adjacent saddle-shaped coil 2. Also in this case, the length l of the vertical side of the saddle-shaped coil 1 is equal to the internal spacing l of every other coil positioning iron plate 4, so that it fits perfectly between every other iron plate 4. Then, similarly, as shown in FIG. 5 (a), the saddle-shaped coils 1-1, 1-2, 1-3, 1-4,... When mounted in this manner, the conductors of the two saddle coils on the iron plate are equally spaced, and the spacing between the conductors is also substantially equal to the width of the conductor. The bent vertical conductors 1a and 2a of the saddle coils 1 and 2 are arranged so as to overlap on the side surface of the iron plate.
次に、2つの鞍形コイル1及び2の横辺の導体部の間
隙部に締め付け用の鉄板5を取り付け、コイル1、2の
縦辺の導体部を押して長尺の鉄板3に締結する。Next, a tightening iron plate 5 is attached to the gap between the conductors on the horizontal sides of the two saddle coils 1 and 2, and the conductors on the vertical sides of the coils 1 and 2 are pressed and fastened to the long iron plate 3.
なお、長尺の鉄板3を連続的に配置するときは、長尺
の鉄板3の間に伸縮量に見合う間隙を設けて締結し、1
つの鞍形コイルを隣り合う長尺の鉄板に跨がるように取
付けて鉄板5で締結すればよい。When the long iron plates 3 are continuously arranged, a gap corresponding to the amount of expansion and contraction is provided between the long iron plates 3 and fastened.
One saddle-shaped coil may be mounted so as to straddle an adjacent long iron plate and fastened with the iron plate 5.
このように組み立てたリアクションプレートは、第5
図(a)、(b)で示されるように、車上界磁との対向
面は面一となり、交互に鉄板と導体部が露出する形とな
り、磁束は直接鉄板部分を通して通るので磁気抵抗が小
さくなる。また、渦電流は鞍形コイルを通してのみ流れ
るので、渦電流損失が小さくなる。さらに、鉄板は、締
め付け用の鉄板5の部分が幅広になるもののこの部分は
飛び飛びであり、全体としては車上界磁鉄心と同じ幅に
することができるので、車体が左右に振れたときには案
内力が作用することになる。The reaction plate assembled in this way is the fifth
As shown in FIGS. 7A and 7B, the surface facing the on-vehicle field is flush, and the iron plate and the conductor are alternately exposed. Since the magnetic flux passes directly through the iron plate, the magnetic resistance is reduced. Become smaller. Further, since the eddy current flows only through the saddle-shaped coil, eddy current loss is reduced. Further, although the iron plate 5 has a widened portion of the iron plate 5 for tightening, this portion is jumpy and can be made the same width as the field core on the vehicle as a whole. The force will act.
以上のように本発明によれば、以下のような効果を達
成することができる。As described above, according to the present invention, the following effects can be achieved.
鞍形コイルを長尺鉄板(鉄心)に埋め込む形のリアク
ションプレートになり、互いにガタがあるため熱膨張率
の差に起因する温度変化による伸縮の差は問題にならな
い。This is a reaction plate in which the saddle-shaped coil is embedded in a long iron plate (iron core), and there is play between the reaction plates, so that a difference in expansion and contraction due to a temperature change due to a difference in coefficient of thermal expansion does not matter.
鉄板がリアクションプレート面に露出する形となるの
で、車上界磁とリアクションプレート間の磁気抵抗が小
さくなり、従来のアルミ−鉄合板のリアクションプレー
トに較べて車上界磁とリアクションプレート間の空隙を
大きくすることができる。Since the iron plate is exposed on the reaction plate surface, the magnetic resistance between the on-vehicle field and the reaction plate is reduced, and the gap between the on-vehicle field and the reaction plate is smaller than the conventional aluminum-iron plywood reaction plate. Can be increased.
鞍形の単コイルを用いるので渦電流路が規定され、従
来のアルミ−鉄合板のリアクションプレートのようにラ
ンダムな回路を渦電流が流れるのに比して渦電流損失の
低減を図ることができる。Since a saddle-shaped single coil is used, an eddy current path is defined, and eddy current loss can be reduced as compared with a conventional circuit in which an eddy current flows through a random circuit like an aluminum-iron plywood reaction plate. .
車上界磁の鉄心巾とリアクションプレートの鉄板巾を
同じにすることができるので、車上界磁とリアクション
プレート間に発生する電磁力(吸引力)の一部を案内力
として利用することができる。その結果、強風や傾斜に
おける転倒を防止することができるとともに、曲線軌道
における通過速度を上げることもできる。Since the width of the iron core of the on-vehicle field and the width of the iron plate of the reaction plate can be made the same, it is possible to use a part of the electromagnetic force (attraction force) generated between the on-vehicle field and the reaction plate as the guiding force. it can. As a result, it is possible to prevent a fall due to a strong wind or an inclination, and it is possible to increase a passing speed in a curved orbit.
車上界磁とリアクションプレート間の空隙を15〜20mm
程度に大きくできるので、車上界磁を鉄車輪軸に直接取
付けることなく、適当な防振ゴム等を介して取付けるこ
とができる。15-20mm gap between on-vehicle field and reaction plate
Since the on-vehicle magnetic field can be increased to such an extent, the field on the vehicle can be attached via a suitable vibration-proof rubber or the like without directly attaching to the iron wheel shaft.
第1図、第2図は第1、第2の鞍形コイルを示す図、第
3図は長尺の鉄板構造を示す図、第4図はコイル締め付
け用鉄板を示す図、第5図は組み立てたリアクションプ
レートを示す図、第6図、第7図は従来のリアクション
プレートを説明するための図である。 1……第1の鞍形コイル、2……第2の鞍形コイル、3
……長尺の鉄板、4……位置決め用鉄板、5……鞍形コ
イル締め付け用鉄板、6……形鋼。1 and 2 show first and second saddle-shaped coils, FIG. 3 shows a long iron plate structure, FIG. 4 shows a coil fastening iron plate, and FIG. FIGS. 6 and 7 show assembled reaction plates. FIGS. 6 and 7 are views for explaining a conventional reaction plate. 1 ... first saddle coil, 2 ... second saddle coil, 3
... Long iron plate, 4 ... Iron plate for positioning, 5 ... Iron plate for tightening saddle type coil, 6 ... Shape steel.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭61−117304(JP,A) 特開 昭62−92760(JP,A) 特開 昭62−92761(JP,A) 特開 平2−106157(JP,A) 実開 昭50−123812(JP,U) 実開 昭63−198378(JP,U) (58)調査した分野(Int.Cl.6,DB名) H02K 41/025 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-117304 (JP, A) JP-A-62-92760 (JP, A) JP-A-62-92761 (JP, A) JP-A-2- 106157 (JP, A) Japanese Utility Model Showa 50-123812 (JP, U) Japanese Utility Model Showa 63-198378 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB name) H02K 41/025
Claims (5)
尺鉄板と、長尺鉄板上に取り付けられた互いに短辺長さ
の異なる2種類の鞍形矩形コイルと、鞍形矩形コイルの
長尺鉄板上の導体部間に配置され、鞍形矩形コイルを締
め付ける締め付け用鉄板とを有し、前記2種類の鞍形コ
イルは、鉄板上の導体部が等間隔で配置されるととも
に、導体部間に鉄板が配置されることを特徴とする組立
式リアクションプレート。1. A long iron plate on which a coil positioning iron plate is mounted, two types of saddle-shaped rectangular coils mounted on the long iron plate having different short side lengths, and a long iron plate of a saddle-shaped rectangular coil An iron plate for tightening the saddle-shaped rectangular coil, which is disposed between the upper conductor portions, and the two types of saddle-shaped coils are arranged such that the conductor portions on the iron plate are arranged at equal intervals, and between the conductor portions. An assembling reaction plate on which an iron plate is arranged.
辺導体部を直角に折り曲げて構成され、折り曲げ部が長
尺鉄板側面において重なるように取り付けられることを
特徴とする請求項1記載の組立式リアクションプレー
ト。2. The two kinds of saddle-shaped rectangular coils are formed by bending a rectangular vertical conductor portion at a right angle, and are mounted so that the bent portions overlap on the side surface of a long iron plate. The assembling reaction plate described.
ぼ同じであることを特徴とする請求項1記載の組立式リ
アクションプレート。3. The assembly type reaction plate according to claim 1, wherein the width of the long iron plate is substantially the same as the width of the iron core of the on-vehicle field.
道側に締結することを特徴とする請求項1記載の組立式
リアクションプレート。4. The assembly type reaction plate according to claim 1, wherein shaped steel members are attached to both sides of the lower surface of the long iron plate and fastened to the track side.
長尺鉄板間に跨がって一つの鞍形コイルを取り付けて長
尺鉄板を接続することを特徴とする請求項1記載の組立
式リアクションプレート。5. The assembly according to claim 1, wherein one saddle-shaped coil is attached to and connected to the long iron plate to which the two kinds of saddle-shaped rectangular coils are attached. Expression reaction plate.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2092599A JP2907484B2 (en) | 1990-04-07 | 1990-04-07 | Assembled reaction plate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2092599A JP2907484B2 (en) | 1990-04-07 | 1990-04-07 | Assembled reaction plate |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH03293958A JPH03293958A (en) | 1991-12-25 |
JP2907484B2 true JP2907484B2 (en) | 1999-06-21 |
Family
ID=14058916
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2092599A Expired - Lifetime JP2907484B2 (en) | 1990-04-07 | 1990-04-07 | Assembled reaction plate |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2907484B2 (en) |
-
1990
- 1990-04-07 JP JP2092599A patent/JP2907484B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH03293958A (en) | 1991-12-25 |
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