JPH0281958A - Temperature measuring device for spark plug - Google Patents
Temperature measuring device for spark plugInfo
- Publication number
- JPH0281958A JPH0281958A JP23576188A JP23576188A JPH0281958A JP H0281958 A JPH0281958 A JP H0281958A JP 23576188 A JP23576188 A JP 23576188A JP 23576188 A JP23576188 A JP 23576188A JP H0281958 A JPH0281958 A JP H0281958A
- Authority
- JP
- Japan
- Prior art keywords
- case
- shield
- spark plug
- internal conductor
- signal converter
- 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
- 239000004020 conductor Substances 0.000 claims abstract description 44
- 230000003287 optical effect Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000009529 body temperature measurement Methods 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 abstract description 8
- 238000000576 coating method Methods 0.000 abstract description 8
- 230000003449 preventive effect Effects 0.000 abstract 1
- 229920002379 silicone rubber Polymers 0.000 description 7
- 239000004945 silicone rubber Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 238000009413 insulation Methods 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 3
- 206010014357 Electric shock Diseases 0.000 description 2
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 2
- NMFHJNAPXOMSRX-PUPDPRJKSA-N [(1r)-3-(3,4-dimethoxyphenyl)-1-[3-(2-morpholin-4-ylethoxy)phenyl]propyl] (2s)-1-[(2s)-2-(3,4,5-trimethoxyphenyl)butanoyl]piperidine-2-carboxylate Chemical compound C([C@@H](OC(=O)[C@@H]1CCCCN1C(=O)[C@@H](CC)C=1C=C(OC)C(OC)=C(OC)C=1)C=1C=C(OCCN2CCOCC2)C=CC=1)CC1=CC=C(OC)C(OC)=C1 NMFHJNAPXOMSRX-PUPDPRJKSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［８：楽士、の利用分野］
本発明は、エンジンの運転中における点火プラグの先端
部の温度測定装置に係わり、特に漏洩するノイズの低減
を図った測定装置に関する。DETAILED DESCRIPTION OF THE INVENTION [8: Field of Application of Musician] The present invention relates to a device for measuring the temperature at the tip of a spark plug during engine operation, and particularly to a measuring device designed to reduce leaking noise.
「従来の技術］
点火プラグの温度測定は、エンジンの混合気、シリンダ
温度、吸気温度、点火時期、回転数、吸気圧、排気圧な
どを変え、燃焼状態や点火プラグの適応性を決めるため
に行う。"Conventional technology" Spark plug temperature measurement is used to determine combustion conditions and spark plug adaptability by changing engine mixture, cylinder temperature, intake air temperature, ignition timing, rotation speed, intake pressure, exhaust pressure, etc. conduct.
この点火プラグの温度測定装置として、この出願人は、
次に述べる実開昭６３−６７８３５号公報に記載の考案
を提案している。As this spark plug temperature measuring device, the applicant has
The following device has been proposed in Japanese Utility Model Application Publication No. 63-67835.
この装置は、点火プラグの先端部に埋設された熱電対と
、該熱電対の起電力をデジタル信号に変換するとともに
、該デジタル信号を光信号に変換して出力する信号変換
部とを備えた点火プラグの温度測定装置において、前記
信号変換部を導電体製容器内に収容するとともに、該容
器と熱電対の一端とを接続している。This device includes a thermocouple embedded in the tip of a spark plug, and a signal converter that converts the electromotive force of the thermocouple into a digital signal, and converts the digital signal into an optical signal and outputs it. In the spark plug temperature measuring device, the signal converter is housed in a conductive container, and the container is connected to one end of a thermocouple.
［発明が解決しようとする問題点］
しかるに、上記点火プラグの温度測定装置では次のよう
な欠点があった。[Problems to be Solved by the Invention] However, the spark plug temperature measuring device described above has the following drawbacks.
（あ）熱電対からの起電力を取り出すコードが、点火高
電圧ラインとほぼ同電位になり、アース間との浮遊容量
増により、ノイズが誘導されやすい。(A) The cord that extracts the electromotive force from the thermocouple has almost the same potential as the ignition high voltage line, and the stray capacitance between it and the ground increases, easily inducing noise.
このコードはシールドされていないので、コードおよび
導電体製容器からのノイズの漏洩が大きい。Since this cord is not shielded, there is significant noise leakage from the cord and conductive container.
よって、このノイズが測定器に影響を与え測定誤差が生
じ易い。Therefore, this noise affects the measuring instrument and tends to cause measurement errors.
（い）熱電対からのコードが点火用の高電圧ラインと電
気的に接続されており、このコードの一端が導電体製容
器と接続されているので、該容器はかなりの高電位とな
り危険である。(b) The cord from the thermocouple is electrically connected to the high-voltage line for ignition, and one end of this cord is connected to a conductive container, so the container has a very high potential and is dangerous. be.
（う）ノイズの漏洩を防ぐために、導電体製容器などの
シールドを行おうとすると、絶縁性を高くする必要があ
り、装置は大がかりなものとなってしまい、取扱いに手
間どる。(c) When attempting to shield a conductive container to prevent noise leakage, it is necessary to increase the insulation properties, resulting in a large-scale device that is difficult to handle.
本発明の目的は、ノイズの漏洩防止効果に優れるととも
に、取扱いが容易で且つ安全性に優れた点火プラグの温
度測定装置の提供にある。SUMMARY OF THE INVENTION An object of the present invention is to provide a spark plug temperature measuring device that has excellent noise leakage prevention effects, is easy to handle, and has excellent safety.
し問題点を解決するための手段］
上記目的達成のため、本発明の点火プラグの温度測定装
置は、点火プラグの先端部に埋設された熱電対と、該熱
電対の起電力をデジタル信号に変換するとともに、該デ
ジタル信号を光信号に変換して出力する信号変換部とを
備えた点火プラグの温度測定装置において、（ア）面記
信号変換部を内部導体製ケース内に収容し、（イ）該内
部導体製ケースを開閉蓋付の外部シールドケース内に絶
縁して固定し、（つ〉シールド被覆内に１対の被覆導線
を配してなるシールド線の、各被覆導線の一端を前記熱
電対と接続し、各被覆導線の他端を前記信号変換部の入
力端と接続し、シールド１）１覆の端部を前記外部シー
ルドケースに接続し、（１）さらに、前記２本の披Ｎ導
線内の一方の他端と前記内部導体製ケースと接続した構
成を採用した。Means for Solving Problems] To achieve the above object, the spark plug temperature measuring device of the present invention includes a thermocouple embedded in the tip of the spark plug and converts the electromotive force of the thermocouple into a digital signal. In the spark plug temperature measuring device, the spark plug temperature measuring device is equipped with a signal converter that converts the digital signal into an optical signal and outputs the digital signal. b) The internal conductor case is insulated and fixed within an external shield case with an opening/closing lid, and (b) one end of each coated conductor of a shielded wire consisting of a pair of coated conductors arranged inside the shield sheath is connect the thermocouple, connect the other end of each coated conductor to the input end of the signal converter, connect the end of the shield 1) to the external shield case, and (1) further connect the two coated conductors. A configuration was adopted in which the other end of one of the N conductor wires was connected to the case made of the internal conductor.
［作用及び発明の効果］
本発明の点火プラグの温度測定装置は、次の作用および
効果を奏する。[Actions and Effects of the Invention] The spark plug temperature measuring device of the present invention has the following actions and effects.
■信号変換部を内部導体製ケース内に収容し、該内部導
体製ケースを外部シールドケース内に絶縁して固定し、
シールド線の、各被覆導線の他端を前記信号変換部の入
力端と接続し、シールド被覆の端部を前記外部シールド
ケースに接続している。■The signal converter is housed within an internal conductor case, and the internal conductor case is insulated and fixed within an external shield case.
The other end of each coated conductor of the shield wire is connected to the input end of the signal converter, and the end of the shield coating is connected to the external shield case.
このため、外部シールドゲースは、点火プラグに印加さ
れる高電圧が内部導体製ケースに誘導されても電位が上
、り難く、載置される場所の影響を内部導体製ケースに
与え難い、よって開閉蓋付シールドケースに触れても感
電の心配が無いので安全性に優れる。For this reason, even if the high voltage applied to the spark plug is induced into the internal conductor case, the external shield gate is unlikely to increase its potential, and the location where it is placed will not affect the internal conductor case. Excellent safety as there is no risk of electric shock even if you touch the shield case with an opening/closing lid.
■シールド被覆内に１対の被覆導線を配してなるシール
ド線の、各被覆導線の一端を前記熱電対と接続し、各被
覆導線の他端を信号変換部の入力端と接続し、シールド
被覆の端部を前記外部シールドケースに接続し、さらに
、前記２木の被覆導線内の・一方の他端と前記内部導体
製ケースと接続している。このため、点火プラグに印加
される高電圧中に重畳しているノイズはシールド線のシ
ールド被覆に捕捉され外部に漏れ難い、また、内部導体
製ケースと外部シールドゲースとの間の浮遊容量により
保有される電荷がプラグの容量放電時に内部ケースの入
力端（被覆導線）を介して、プラグに流れるため内部ケ
ース内の信号変換部の回路の破壊も招き難い。■ Connect one end of each coated conductor to the thermocouple, connect the other end of each coated conductor to the input end of the signal converter, and An end of the covering is connected to the external shield case, and the other end of one of the two covered conductors is connected to the internal conductor case. Therefore, the noise superimposed on the high voltage applied to the spark plug is captured by the shield coating of the shield wire and difficult to leak to the outside, and is retained due to the stray capacitance between the internal conductor case and the external shield gate. When the capacitance of the plug is discharged, the electric charge flows to the plug via the input end (covered conductor) of the inner case, so that the circuit of the signal converter inside the inner case is less likely to be damaged.
■外部シールドケースおよびシールド線により装置の遮
蔽が施されているので、測定の都度シールドを図る必要
がない。また、外部シールドケースは藍が開けられるの
で信号変換部の点検が可能である。よって、手間がかか
らず、取扱いが容易である。■Since the device is shielded by an external shield case and shield wire, there is no need to shield each time a measurement is made. Additionally, the external shield case can be opened to allow inspection of the signal converter. Therefore, it is easy to handle and requires no effort.
［実施例］
次に本発明を第１図および第２図に示す一実施例に基づ
き説明する。[Example] Next, the present invention will be explained based on an example shown in FIGS. 1 and 2.
点火プラグの温度測定装置Ａは、信号変換部（図示せず
）を内部導体製ケース１内に収容し、外部シールドケー
ス２内に、内部導体製ケース１ｔ！−固定し、シールド
線５で熱電対（図示せず）と信号変換部とを繋いでなる
。The spark plug temperature measuring device A houses a signal converter (not shown) in a case 1 made of an internal conductor, and a case 1t! made of an internal conductor is housed in an external shield case 2. - A thermocouple (not shown) and a signal converter are connected by a shielded wire 5.
内部導体製ケース１は、静電遮蔽効果に優れたアルミで
形成された中空の直方体の箱で、−側面には光ファイバ
ー（図示せず）を接続するコネクタ１１が配設され、他
側面の近傍には前記信号変換部の入力端に繋る抵抗１２
．１３のリード線１４．１５が配設されている。また、
このケース１は、外部シールドケース２との間に５ｍｍ
〜１５ｍｍの間隙１６を設けるとともに受は台１７に小
面積で当接している。The internal conductor case 1 is a hollow rectangular parallelepiped box made of aluminum with excellent electrostatic shielding effect.A connector 11 for connecting an optical fiber (not shown) is arranged on one side, and a is a resistor 12 connected to the input terminal of the signal converter.
．． Thirteen lead wires 14,15 are arranged. Also,
This case 1 has a distance of 5mm between it and the external shield case 2.
A gap 16 of ~15 mm is provided, and the receiver contacts the stand 17 over a small area.
外部シールドケース２は、内部導体製ケース１と同様に
アルミで形成された中空の直方体の箱（奥行６０ｍｍ、
高さ６０ｍｍ、横８５ ｍ ｍ ）で、蝶番２１で開閉
自在とされた蓑３をケース本体４の上面開口４１に外嵌
している。The external shield case 2 is a hollow rectangular parallelepiped box (depth 60 mm,
A cover 3, which has a height of 60 mm and a width of 85 mm, and can be opened and closed with a hinge 21, is externally fitted into the upper opening 41 of the case body 4.
Ｍ３は、下面にスポンジ３１を、さらにその下にシリコ
ンゴムシート３２をそれぞれ貼着している。また、内部
導体製ケース１を加圧するためのスポンジ３３が前記シ
リコンゴムシート３２の中央部に接着されている。蓋３
のケース本体４への固定は、ケース本体４の前側面に配
設されたセミ型パツキン錠４２で行っている。M3 has a sponge 31 attached to its lower surface and a silicone rubber sheet 32 attached below it. Further, a sponge 33 for pressurizing the internal conductor case 1 is adhered to the center of the silicone rubber sheet 32. Lid 3
is fixed to the case body 4 using a semi-shaped lock 42 provided on the front side of the case body 4.
ケース本体４は、内壁にシリコンゴムモールド４３が、
さらにその内側にはシリコンゴム４４がそれぞれ貼着（
両方で３ ｍ ｍ−ｌ Ｑ ｍ ｍの厚さ）されている
。このシリコンゴム４４の上面開口４１ ｉ！ＩＩＩは
該開口４１の中心方向に延出している。ケース本体４の
一方側面には、光ケーブル（図示せず）を通す孔４５が
穿設されている。また、シールド線５の固定用の筒状金
具４６が突設され、他方側面に固着されている。The case body 4 has a silicone rubber mold 43 on the inner wall.
Furthermore, silicone rubber 44 is pasted on the inside of each (
Both have a thickness of 3 mm ml Q mm). The upper surface opening 41 of this silicone rubber 44 i! III extends toward the center of the opening 41. A hole 45 through which an optical cable (not shown) passes is bored in one side of the case body 4. Further, a cylindrical metal fitting 46 for fixing the shield wire 5 is provided protrudingly and fixed to the other side surface.
シールド線５は、内部に１対の被覆導線５１．５２が洞
貫され、外周がメツシュ状のシールド被覆５３で破損さ
れた耐圧絶縁耐圧５０ｋＶのＣＡケーブルである。シー
ルド被覆５３の端部は、前記筒状金具４６の先端の挟持
部４７で、ねじ（図示せず）により圧着され、前記シー
ルドケース２と電気的に導通が図られている。また、前
記筒状金具４６とシールド線５との隙間は、前記シリコ
ンゴム４４が充填され、絶縁および固占性の向上を図っ
ている。The shielded wire 5 is a CA cable with a withstand voltage of 50 kV and has a pair of coated conducting wires 51 and 52 penetrated inside, and whose outer periphery is damaged by a mesh-like shield coating 53. The end portion of the shield covering 53 is crimped by a screw (not shown) at the clamping portion 47 at the tip of the cylindrical metal fitting 46, and is electrically connected to the shield case 2. Further, the gap between the cylindrical metal fitting 46 and the shield wire 5 is filled with the silicone rubber 44 to improve insulation and solidity.
本発明の点火プラグの温度測定装ＺＡは、次の作用およ
び効果を奏する。The spark plug temperature measuring device ZA of the present invention has the following functions and effects.
（チ）信号変換部を内部導体製ケース１内に収容し、内
部導体製ケース１を外部シールドケース２内に絶縁して
固定している。このため外部シールドケース２は、点火
プラグに印加される高電圧が内部導体製ケース１に誘導
され′Ｃも電位が上り難く、載置される場所の影響を内
部導体製ケース１に与え難い。よって外部シールドケー
ス２に触れても感電の心配が無いので安全性が高い。ま
た、被覆導線５２．５３および内部導体製ケース１から
、外部シールドケース２や大地に放電し難いので信号変
換部の回路素子が静電破壊を起こし難い。(H) The signal converter is housed in an internal conductor case 1, and the internal conductor case 1 is insulated and fixed within an external shield case 2. Therefore, in the external shield case 2, the high voltage applied to the ignition plug is induced into the internal conductor case 1, so that the potential does not easily rise, and the internal conductor case 1 is hardly affected by the location where the spark plug is placed. Therefore, there is no fear of electric shock even if the external shield case 2 is touched, so safety is high. Further, since it is difficult for electrical discharge to occur from the covered conductor wires 52, 53 and the internal conductor case 1 to the external shield case 2 or the ground, electrostatic damage to the circuit elements of the signal converter section is difficult to occur.
（す）シールド線５の他端の被覆導線５１．５２が信号
変換部の入力端に繋る抵抗１２．１３のリード線１４．
１５に接続され、シールド被覆５３の端部は筒状金具４
６の先端の挟持部４７に接続されている。このため点火
プラグに印加される高電圧中に重畳しているノイズはシ
ールド線５のシールド被覆５３に捕捉され外部に漏れ難
い。(S) The lead wire 14. of the resistor 12.13 where the covered conductor wire 51.52 at the other end of the shielded wire 5 is connected to the input end of the signal conversion section.
15, and the end of the shield covering 53 is connected to the cylindrical metal fitting 4.
It is connected to a clamping part 47 at the tip of 6. Therefore, the noise superimposed on the high voltage applied to the spark plug is captured by the shield coating 53 of the shield wire 5 and is unlikely to leak to the outside.
（ヌ）外部シールドケース２は、蝶番２１で開閉自在と
されたＭ３をケース本体４の上面開口４１に外嵌し、セ
ミ型パツキン錠４２で蓋３をケース本体４に固定してい
る。このため、蓋３をあけることにより、スイッチ（図
示せず）の大切、電池（図示せず）の交換、信号変換部
の点検などができる。(v) The external shield case 2 has an M3 that can be opened and closed freely with a hinge 21 and is fitted onto the top opening 41 of the case body 4, and the lid 3 is fixed to the case body 4 with a semi-shaped packing lock 42. Therefore, by opening the lid 3, it is possible to inspect the switch (not shown), replace the battery (not shown), and inspect the signal converter.
（ル）外部シールドケース２およびシールド線５により
装耳Ａの遮蔽が常時性われるので、従来のように測定の
都度シールドを行わなくてもよい。(l) Since the external shield case 2 and the shield wire 5 shield the ear fitting A at all times, there is no need to shield each time a measurement is made as in the conventional case.
（ヲ）シリコンゴム４４の士４面開口４１側は該開口４
１の中心方向に延出している。このため、内部導体製ケ
ース１と外部シールドケース２との絶縁性が向上する。(w) The opening 41 side of the silicone rubber 44 is located at the opening 4.
It extends toward the center of 1. Therefore, the insulation between the internal conductor case 1 and the external shield case 2 is improved.
（ワ）内部導体製ケース１は、外部シールドケース２と
の間に５ｍｍ・〜１５ｍｍの間隙】６が設けられている
。このため、イグニッションコイルの二次側の高電圧ラ
インの浮遊容量を著しく増加させない。よっ°Ｃ１高電
圧発生回路の効率の低下や信号変換部の回路素子の破壊
を招き難い。(W) A gap 6 of 5 mm to 15 mm is provided between the internal conductor case 1 and the external shield case 2. Therefore, the stray capacitance of the high voltage line on the secondary side of the ignition coil is not significantly increased. Therefore, it is unlikely that the efficiency of the C1 high voltage generation circuit will be lowered or the circuit elements of the signal conversion section will be destroyed.
（力）内部導体製ケース１は受は台１７に小面積で当接
している。このため、ケース１とケース２との絶縁性に
優れる。また、浮遊容量を著しく増加させない。(Force) The case 1 made of an internal conductor is in contact with the stand 17 over a small area. Therefore, the insulation between case 1 and case 2 is excellent. Furthermore, it does not significantly increase stray capacitance.
第１図は本発明の点火プラグの温度測定装置を１面から
見た一部断面図、第２図はその装置を側面から見た一部
断面図である。
図中 １・・・内部導体製ケース ２・・・外部シール
ドケース ３・・・蓋 ４・・・ケース本体 ５・・・
シールド線 １４．１５・・・リード線（入力端） ５
１．５２・・・被覆導線 ５３・・・シールド被覆 Ａ
・・・点火プラグの温度測定装置FIG. 1 is a partial sectional view of the spark plug temperature measuring device of the present invention seen from one side, and FIG. 2 is a partial sectional view of the device seen from the side. In the figure 1... Internal conductor case 2... External shield case 3... Lid 4... Case body 5...
Shield wire 14.15...Lead wire (input end) 5
1.52... Covered conductor wire 53... Shield coating A
...Spark plug temperature measuring device
Claims (1)
対の起電力をデジタル信号に変換するとともに、該デジ
タル信号を光信号に変換して出力する信号変換部とを備
えた点火プラグの温度測定装置において、 （ア）前記信号変換部を内部導体製ケース内に収容し、 （イ）該内部導体製ケースを開閉蓋付の外部シールドケ
ース内に絶縁して固定し、 （ウ）シールド被覆内に１対の被覆導線を配してなるシ
ールド線の、各被覆導線の一端を前記熱電対と接続し、
各被覆導線の他端を前記信号変換部の入力端と接続し、
シールド被覆の端部を前記外部シールドケースに接続し
、 （エ）さらに、前記２本の被覆導線内の一方の他端と前
記内部導体製ケースと接続した ことを特徴とする点火プラグの温度測定装置。[Claims] 1) A thermocouple embedded in the tip of a spark plug, and a signal conversion unit that converts the electromotive force of the thermocouple into a digital signal, and converts the digital signal into an optical signal and outputs it. (a) the signal converter is housed in a case made of an internal conductor, and (b) the case made of the internal conductor is insulated in an external shield case with an opening/closing lid. (c) connecting one end of each coated conductor to the thermocouple of a shield wire consisting of a pair of coated conductors disposed within the shield sheath;
Connecting the other end of each covered conductor to the input end of the signal converter,
Temperature measurement of a spark plug characterized in that an end of the shield covering is connected to the external shield case, and (d) the other end of one of the two covered conductors is further connected to the internal conductor case. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63235761A JP2624525B2 (en) | 1988-09-20 | 1988-09-20 | Spark plug temperature measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63235761A JP2624525B2 (en) | 1988-09-20 | 1988-09-20 | Spark plug temperature measurement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0281958A true JPH0281958A (en) | 1990-03-22 |
| JP2624525B2 JP2624525B2 (en) | 1997-06-25 |
Family
ID=16990846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63235761A Expired - Lifetime JP2624525B2 (en) | 1988-09-20 | 1988-09-20 | Spark plug temperature measurement device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2624525B2 (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56150011U (en) * | 1980-04-11 | 1981-11-11 | ||
| JPS5740812A (en) * | 1980-08-25 | 1982-03-06 | Ngk Spark Plug Co | Noise suppressing wire wound resistance wire |
| JPS6042411U (en) * | 1983-08-26 | 1985-03-26 | 株式会社 網野鉄工所 | Opposing hydraulic forming device |
| JPS6367835U (en) * | 1986-10-18 | 1988-05-07 |
-
1988
- 1988-09-20 JP JP63235761A patent/JP2624525B2/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56150011U (en) * | 1980-04-11 | 1981-11-11 | ||
| JPS5740812A (en) * | 1980-08-25 | 1982-03-06 | Ngk Spark Plug Co | Noise suppressing wire wound resistance wire |
| JPS6042411U (en) * | 1983-08-26 | 1985-03-26 | 株式会社 網野鉄工所 | Opposing hydraulic forming device |
| JPS6367835U (en) * | 1986-10-18 | 1988-05-07 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2624525B2 (en) | 1997-06-25 |
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