JPS586984A - Electric current collector - Google Patents
Electric current collectorInfo
- Publication number
- JPS586984A JPS586984A JP56105063A JP10506381A JPS586984A JP S586984 A JPS586984 A JP S586984A JP 56105063 A JP56105063 A JP 56105063A JP 10506381 A JP10506381 A JP 10506381A JP S586984 A JPS586984 A JP S586984A
- Authority
- JP
- Japan
- Prior art keywords
- current collector
- plates
- current
- bodies
- frame
- 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.)
- Pending
Links
- 239000011261 inert gas Substances 0.000 claims abstract description 10
- 239000003014 ion exchange membrane Substances 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 2
- 239000006185 dispersion Substances 0.000 description 17
- 239000012528 membrane Substances 0.000 description 10
- 239000003054 catalyst Substances 0.000 description 9
- 238000005868 electrolysis reaction Methods 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 238000005341 cation exchange Methods 0.000 description 6
- 229910052751 metal Inorganic materials 0.000 description 5
- 239000002184 metal Substances 0.000 description 5
- -1 Platinum group metals Chemical class 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 229910052759 nickel Inorganic materials 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- 241000255789 Bombyx mori Species 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000037237 body shape Effects 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 239000010411 electrocatalyst Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 239000010955 niobium Substances 0.000 description 1
- GUCVJGMIXFAOAE-UHFFFAOYSA-N niobium atom Chemical compound [Nb] GUCVJGMIXFAOAE-UHFFFAOYSA-N 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 1
- 239000005518 polymer electrolyte Substances 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 229910052715 tantalum Inorganic materials 0.000 description 1
- GUVRBAGPIYLISA-UHFFFAOYSA-N tantalum atom Chemical compound [Ta] GUVRBAGPIYLISA-UHFFFAOYSA-N 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
Landscapes
- Electrodes For Compound Or Non-Metal Manufacture (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、電極をイオン交換膜と一体化又は密着してな
る電解槽ｔＣ訃いて使用される集電体に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a current collector used in an electrolytic cell, in which an electrode is integrated with or in close contact with an ion exchange membrane.
ハロゲン化アルカリ水溶液のイオン交換膜性電解にお−
ては、陽イオン交換膜によｐ陽極室と陰極室を区画し、
陽極及び陰極を膜に近接して配置する。近年、陽極と陰
極との極間距離を小さくして電解電圧を低くするため、
電極触媒を膜表面に堀設する等して膜と電極を一体化さ
せる、いわゆる固体重合体電解質臘構造の装置や、黴細
な網状の電極を膜に＊＊させる構造の電解槽が提案され
ている。For ion exchange membrane electrolysis of aqueous halogenated alkali solutions.
The p anode chamber and the cathode chamber are divided by a cation exchange membrane,
An anode and a cathode are placed in close proximity to the membrane. In recent years, in order to reduce the electrolytic voltage by reducing the distance between the anode and cathode,
Devices with a so-called solid polymer electrolyte structure, in which the membrane and electrode are integrated by drilling an electrode catalyst on the membrane surface, and electrolytic cells with a structure in which a fine mesh electrode is attached to the membrane have been proposed. ing.
このような電解装置においては、イオン交換膜と一体化
又は密着された電極に対する給電手段としての集電体が
必要でＴｏｌｌ、この集電体は液及びガス透過性である
とともに、電極との接触抵抗がで鳶るだ妙手さいものと
なる構造であることが必蚕とされる。In such an electrolytic device, a current collector is required as a power supply means for the electrode that is integrated with or in close contact with the ion exchange membrane.This current collector is permeable to liquid and gas, and has no contact with the electrode. It is essential that the structure of the silkworm be able to resist.
この丸め、複数の細長いリプ状央起を設は九集電体を用
いる場合（例えば特開昭５５−１１３８８４及び特開ｗ
Ｅ５５−１１５９８０）、’＜＊等ｏ弾ａ体からなる集
電体を用いる場合（例えば特開１８５５−１４８７８２
、特開昭５５−１４４０８５及び特開４５６−５５５７
８）’等が提案されている。This rounding and the provision of multiple elongated lip-like centers are possible when nine current collectors are used (for example, JP-A-55-113884 and JP-A-W
E55-115980), '
, JP 55-144085 and JP 456-5557
8)' etc. have been proposed.
しかし、これらの集電体を用いて一１電極と集電体との
密着強度が十分でなく、接触抵抗が大きいという問題が
あり九。However, when using these current collectors, there is a problem in that the adhesion strength between the electrode and the current collector is insufficient and the contact resistance is large.
本発明はこの問題を解決すべくなされえものであシ、電
極との密着強１１ＥＫ優れ、且つ長期にＩって強力な密
着力を保持し得る構造の集電体を提供すべくなされ九も
のである。The present invention was made to solve this problem, and to provide a current collector with a structure that has excellent adhesion strength with electrodes and can maintain strong adhesion over a long period of time. It is.
本発明の集電体は、陽極又状陰極の少くとも一方の電極
がイオン交換膜と一体化又は密着してなる電解装置の咳
少くとも一方の電極に給電する丸めの集電体において、
諌集電体が
（＆） 相対する２枚の多孔性の集電板と；＞）練条
電板の周日に配置される矩形の室枠と；（ｅ） 該室
枠の下部に固定されて前記２秋の集電板の中間に導入さ
れる給電棒と；
（ｄ） 腋給電棒を囲んで該給電棒と前記集電板とを
電気的及び機械的に接続する中空筒状の電流分散体と；
（・） 線電流分散体内部に不活性ガスを圧入する装置
と；
から成ｐ１
前記電流分散体は、その内部に圧入される不活性ガスの
圧力によル膨張し、鋏膨張力によって前記２枚の集電板
が室枠の幅よｐ外部方向に向けて押し出されうる構造で
あることを特徴とするものである。The current collector of the present invention is a round current collector for supplying power to at least one electrode of an electrolytic device in which at least one electrode of an anode or a forked cathode is integrated with or in close contact with an ion exchange membrane. The current collector includes (&) two porous current collector plates facing each other; (>) a rectangular chamber frame arranged around the drawn current plate; and (e) fixed to the lower part of the chamber frame. (d) a hollow cylindrical current that surrounds the armpit power supply rod and electrically and mechanically connects the power supply rod and the current collector plate; A dispersion element; (・) A device for pressurizing an inert gas into the inside of the line current dispersion element; The present invention is characterized by a structure in which the two current collector plates can be pushed outward by a width greater than the width of the chamber frame by force.
食塩電解に使用される場合を例として、本発明に係る集
電体の一実施例を以下に図面に従って説明する。An embodiment of the current collector according to the present invention will be described below with reference to the drawings, taking as an example the case where it is used for salt electrolysis.
第１ｇは、本発＠に係る集電体の一部切欠斜視 、
外・図であシ、第２図は、第１図のムー人線横断面図で
ある。第ｓ １ｌＩａ、本発明に係る集電体の一部を構
成する中空体状の電流分散体の一例であｐ１第４図は電
流分散体の別の一例である。第５図は本発明に係る集電
体を使用した電解装置の横断面図である。The 1st g is a partially cutaway perspective view of the current collector according to the present invention,
FIG. 2 is a cross-sectional view taken along the mu line of FIG. 1. Fig. s 1lIa is an example of a hollow body-shaped current dispersion body constituting a part of the current collector according to the present invention, and Fig. 4 is another example of the current dispersion body. FIG. 5 is a cross-sectional view of an electrolysis device using the current collector according to the present invention.
図において、集電体１は、相対する２枚の多孔性の′集
電板２，２〆と、集電板２，２１の周ｓＫ配置されゐ矩
形の室枠５と、室枠６の下部に固定されて集電板２．２
′の中間に導入される給電棒４と、給電棒４を凹んで給
電棒４と集電板２．２′とを電気的に接続する中空筒状
の電流分散体５とから成る。In the figure, the current collector 1 includes two opposing porous current collector plates 2, 2, a rectangular chamber frame 5 arranged around the circumferences of the current collector plates 2, 21, and a rectangular chamber frame 5 arranged around the circumference of the current collector plates 2, 21. Current collector plate fixed at the bottom 2.2
It consists of a power supply rod 4 introduced in the middle of the power supply rod 4, and a hollow cylindrical current dispersion body 5 that recesses the power supply rod 4 and electrically connects the power supply rod 4 and the current collector plate 2.2'.
集電板２．２′は網板、多孔板等の淑及びｊスが透過可
能な多孔性構造であ〕、電流分散体５を介して給電棒４
に固定される。給電棒４は矩形の基枠３の下部に固定さ
れ、室枠３と集電板２ 、２’０内儒に電解室６，６′
が形成されるようになっている。The current collector plate 2.2' has a porous structure, such as a mesh plate or a perforated plate, through which the electric current and the electric current can pass through.
Fixed. The power supply rod 4 is fixed to the lower part of the rectangular base frame 3, and the electrolysis chambers 6, 6' are connected to the chamber frame 3 and the current collector plate 2, 2'0.
is starting to form.
集電体１が陽極への給電手段である場合Ｋａ、集電体１
紘陽極側電解生成物に対し耐食性が６９且つ陽極触媒よ
り高い塩素過電圧の材料によｐ構成される。陽極触媒と
しては一般に白金族金属、その合金、これらの還元酸化
物又は黒鉛等が用いられる九め、集電体１はチタン、タ
ンタル、ニオブ等のパルプメタルで構成されるが、陽極
触媒と直接接触する集電＠２．２’の表頁には白金族金
属やその酸化物等の陽極触媒と同様の被覆を設けて、パ
ルプメタルと陽極触媒との接触部分がＩ（ルプメタルの
酸化物によｐ絶縁されるのを防ぐのが望ましいＯ
壕九、陰極触媒としては一般に多孔質ニッケル、白金族
金属又は黒＊＊が用いられる。集電体１が陰極への給電
手段である場合に紘、集電体１は陰極触媒よｐ高い水素
過電圧の材料、例えとニッケル、ニッケル被覆鉄、ステ
ンレス勢によシ構成される。When the current collector 1 is a means for feeding power to the anode, Ka, the current collector 1
The electrode is made of a material that has a corrosion resistance of 69% for the electrolysis product on the anode side and a higher chlorine overvoltage than the anode catalyst. Platinum group metals, their alloys, their reduced oxides, or graphite are generally used as the anode catalyst.The current collector 1 is made of pulp metal such as titanium, tantalum, niobium, etc. The front page of the contacting current collector @2.2' is coated with the same coating as the anode catalyst such as platinum group metals and their oxides, so that the contact area between the pulp metal and the anode catalyst is Porous nickel, platinum group metal or black is generally used as the cathode catalyst. The current collector 1 is made of a material having a hydrogen overvoltage p higher than that of the cathode catalyst, such as nickel, nickel-coated iron, or stainless steel.
尚、集電体１のうち室枠３のみは、電層電流に関与しな
いのでプラスチック等の絶縁性材料で構成することもで
自為。Incidentally, only the chamber frame 3 of the current collector 1 can be made of an insulating material such as plastic, since it does not take part in the layer current.
集電板２．２′は電流分散体５ Ｋ１１ｌ！され、電流
分散体５は給電棒４に溶接されて、固定されているが、
集電板２．２′の周縁と室枠３とは直接に固定されてお
らず、集電板２，２′は室枠３から離隔しうるようにな
っている。Current collector plate 2.2' is current dispersion element 5 K11l! The current dispersion body 5 is welded and fixed to the power supply rod 4,
The peripheral edges of the current collector plates 2, 2' and the chamber frame 3 are not directly fixed, and the current collector plates 2, 2' can be separated from the chamber frame 3.
電流分散体５は、中空体状であシ、不活性ガス供給管７
により内部に窒素ガス勢の不活性ガスが圧入されるよう
になっておシ、この不活性ガスの圧力によシミ流分散体
が膨張し、膨張力によって２枚の集電板２．２′が室枠
５の幅よシ外部方向に向けて押し出されうる構造となっ
ている。従って、電流分散体５は、２秋Ｏ集電板の間隔
を拡げるＯＫ有効な構造であることがｉｉましく、例え
ば第３図に示すように扁平で側部に緩衝部分８を有して
いる中空筒状構造が採用しうる。ｔた、第４１１に示す
ように上部においてもｌ！１町部分９を有する構造であ
れば、上部方向への不必要な膨張を抑制することがでＩ
ｊ！に好ましい。The current dispersion body 5 has a hollow body shape, and an inert gas supply pipe 7
An inert gas in the form of nitrogen gas is forced into the interior, and the stain flow dispersion expands due to the pressure of this inert gas, and the expansion force causes the two current collector plates 2.2' It has a structure that allows it to be pushed out toward the outside by the width of the chamber frame 5. Therefore, it is preferable that the current dispersion body 5 has an effective structure that widens the interval between the two current collector plates, for example, as shown in FIG. 3, it is flat and has a buffer portion 8 on the side. A hollow cylindrical structure can be adopted. Also, as shown in No. 411, at the top! If the structure has one section 9, unnecessary expansion in the upward direction can be suppressed.
j! preferred.
不活性ガス供給管７には、集電体１の外部において圧力
制御弁（図示せず）が取シ付けられ、電流分散体５内部
を所定の圧力に保持できるようになっている。A pressure control valve (not shown) is attached to the inert gas supply pipe 7 outside the current collector 1, so that the inside of the current dispersion body 5 can be maintained at a predetermined pressure.
本発明に係る集電体を電解装置に使用する場合、第５図
に示すように、陽極側集電体１ａと陰極側集電体１ｂが
、電極と一体化された陽イオン交換膜１０を挾んで交互
に配置される。陽極側集電体１ａと接する側の陽イオン
交換属表藺には陽極触媒、陰極側集電体１ｂと接する側
の陽イオン交換膜表面に杜、陰極触媒が密着せしめられ
ている。When the current collector according to the present invention is used in an electrolysis device, as shown in FIG. They are sandwiched and placed alternately. An anode catalyst is adhered to the cation exchange membrane surface on the side in contact with the anode side current collector 1a, and a cathode catalyst is adhered to the cation exchange membrane surface on the side in contact with the cathode side current collector 1b.
とれらの集電体及び電極と一体化された陽イオン交換膜
は、全体をタイロッド１２によりてボルト締め勢の手段
によシ締め付けられる。この締め付は力は、室枠６、陽
イオン交換膜１０及びその中間に挾まれるガスケット１
３を密着させ、且つ電流分散体５の膨張に基づき集電板
２．２′にかかる圧力に打ち勝つだけの圧力とする。従
って、集電板２．２′にかかる圧力によって、集電板と
膜よＯ電極触媒との緊密な接触が達成される。The cation exchange membrane integrated with these current collectors and electrodes is tightened as a whole by means of bolt tightening force using tie rods 12. This tightening force is applied to the chamber frame 6, the cation exchange membrane 10, and the gasket 1 sandwiched between them.
3 are brought into close contact with each other, and the pressure is applied to overcome the pressure applied to the current collector plate 2.2' due to the expansion of the current dispersion body 5. The pressure exerted on the current collector plate 2.2' thus achieves intimate contact between the current collector plate and the membrane-O electrocatalyst.
上記は、陽極及び陰極が陽イオン交換膜の表面上に一体
化された場合の例であるが、陽極及び／ ・□ゝ
・又は陰極として黴細な三次元の網等を使用し、これを
イオン交換膜Ｋｌ！Ｆ着させる場合にも、本発明の集電
体を使用することがで自る。１＋、陽極又は陰極のいず
れか一方がイオン交換膜と一体化又は密着され、他方社
電極板と室枠岬とからなる電極構造を用いる場合の、イ
オン交換膜と一体化又は密着された電極への給電手段と
して本発明の集電体を用いることもできる。ζや場合、
材質の経済性及び加工の容易さ等の点から陰極側に本発
明の集電体を用いることが望ましい。The above is an example in which the anode and cathode are integrated on the surface of the cation exchange membrane. Ion exchange membrane Kl! The current collector of the present invention can also be used in the case of F deposition. 1+, either the anode or the cathode is integrated with or in close contact with the ion exchange membrane, and the other electrode is integrated with or in close contact with the ion exchange membrane when an electrode structure consisting of an electrode plate and a chamber frame cape is used. The current collector of the present invention can also be used as a power feeding means. ζ and case,
It is desirable to use the current collector of the present invention on the cathode side from the viewpoint of economic efficiency of the material and ease of processing.
本発明に係る集電体によれば、中空筒状の電流分散体の
内部に圧入される不活性ガスの圧力によｐ電流分散体が
膨張し、その膨張力により集電板が室枠の輻よシ外部方
向に向けて押し出される構造であるため、集電板にかか
る圧力によって電極と集電体との緊密な接触が達成され
る。更に、電流分散体の内部への不活性ガスの圧入は、
集１体外部に設けられる圧力制御弁によシ適宜調節する
ことができるので、電解槽運転中においても長期に亘っ
て強力な圧力を加えることが可能である。According to the current collector according to the present invention, the p-current dispersion expands due to the pressure of the inert gas injected into the hollow cylindrical current dispersion, and the expansion force causes the current collector plate to move toward the chamber frame. Since the structure is radially extruded outward, the pressure applied to the current collector plate achieves close contact between the electrode and the current collector. Furthermore, injecting an inert gas into the interior of the current dispersion
Since the pressure can be adjusted appropriately using a pressure control valve provided outside the collector, it is possible to apply strong pressure for a long period of time even during operation of the electrolytic cell.
第１図は本発明に係る集電体の一部切欠斜視図であ）、
第２図は第１図ＯＡ−人線横断面図である。第３図線本
発１１に係る集電体の一部を構成する中空体状の電流分
散体の一例であシ、第４図は電流分散体の別の一例でお
る。第５図紘本発明に係る集電体を使用した電解装置の
横断面図である。
１・・・・・・・・・・・・・・・集電体１ａ・・・・
・・・・・・・・陽極側集電体１ｂ・・・・・・・・・
・・・陰極側集電体２．２′ ・・・・・・・・・集電
板
３・・・・・・・・・・・・・・・室枠４・・・・・・
・・・・・・・・・給電棒５・・・・・・・・・・・・
・・・電流分散体６．６Ｉ ・・・・・・・・・電解室FIG. 1 is a partially cutaway perspective view of a current collector according to the present invention),
FIG. 2 is a cross-sectional view of the OA-human line in FIG. 1. Figure 3 shows an example of a hollow body-shaped current dispersion body constituting a part of the current collector according to the main power source 11, and Figure 4 shows another example of the current dispersion body. FIG. 5 is a cross-sectional view of an electrolysis device using a current collector according to the present invention. 1...... Current collector 1a...
......Anode side current collector 1b...
... Cathode side current collector 2.2' ...... Current collector plate 3 ...... Chamber frame 4 ...
・・・・・・・・・Power rod 5・・・・・・・・・・・・
...Current disperser 6.6I ...... Electrolytic chamber
Claims (1)
体化又は密着してなる電解装置の腋少くとも一方の電極
に給電するための集電体において、該集電体が （Ａ） 相対する２秋の多孔性の集電板と：（ｂ）
諌集電板の周囲に配置される矩形の室枠と；（ｔｌ）
諌意枠の下部に固定されて前記２枚０集電板の中間
に導入される給、電棒と； （イ）腋給電棒を囲んで皺給電棒と前記集電板とを電気
的及び機械的に接続する中９筒状の電流分散体と： （６） 諌電流分散体内部に不活性ガスを圧入する装
置と； から成シ、 前記電流分散体は、その内部に圧入される不活性ガスの
圧力によシ膨張し、該膨張力によって前記２枚の集電板
が室枠０幅よ〕外部方向に向けて押し出されうる構造で
あることを特徴とする集電体。[Scope of Claims] A current collector for supplying power to at least one electrode in the armpit of an electrolytic device, in which at least one electrode of an anode or a cathode is integrated with or in close contact with an ion exchange membrane, the current collector (A) Two opposing porous current collector plates: (b)
A rectangular chamber frame placed around the current collector plate; (tl)
(a) Surrounding the armpit power supply rod, the wrinkled power supply rod and the current collector plate are connected electrically and mechanically to the power supply rod, which is fixed to the lower part of the power supply frame and introduced between the two current collector plates. (6) a device for pressurizing an inert gas into the inside of the current dispersing body; 1. A current collector having a structure in which it expands due to the pressure of a gas, and the two current collector plates are pushed out toward the outside of the chamber frame by the expansion force.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56105063A JPS586984A (en) | 1981-07-07 | 1981-07-07 | Electric current collector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56105063A JPS586984A (en) | 1981-07-07 | 1981-07-07 | Electric current collector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS586984A true JPS586984A (en) | 1983-01-14 |
Family
ID=14397498
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56105063A Pending JPS586984A (en) | 1981-07-07 | 1981-07-07 | Electric current collector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS586984A (en) |
-
1981
- 1981-07-07 JP JP56105063A patent/JPS586984A/en active Pending
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