JPS5936831Y2 - electric wire fuse - Google Patents

Description

【考案の詳細な説明】 本考案は電線ヒユーズに関するものである。[Detailed explanation of the idea] The present invention relates to electric wire fuses.

従来、この種電線ヒユーズは、既に周知のように防爆密
閉型であり、しや吋時におけるヒユーズのしゃ断ガスが
ヒユーズ筒の内壁面に蒸着して、ヒユーズ端子間の絶縁
抵抗値を大きく低下せしめる欠点があった。Conventionally, this type of electric wire fuse, as is already well known, is an explosion-proof sealed type, and the cut-off gas of the fuse during heating is deposited on the inner wall surface of the fuse cylinder, greatly reducing the insulation resistance value between the fuse terminals. There were drawbacks.

この点を改善し得るものとして、第１図に示すタイプの
電線ヒユーズが考案された。In order to improve this point, an electric wire fuse of the type shown in FIG. 1 was devised.

これは、ヒユーズ筒１の両側に密封する絶縁物からなる
栓部２を有するリード線取付端子３の栓部２の内側凹底
部２ａに、耐熱性絶縁物、例えばセラミックペーパ４を
ヒユーズ端子５を貫通せしめて挿入し、栓部２の中心部
にリード線取付端子３とヒユーズ端子５の径の差違に相
１って空隙６を形成した構造であり、しゃ断時における
ヒユーズのしゃ断ガスはセラミックペーパ４に遮蔽され
、凹嵌部２ａに直接蒸着することが防止される。This is done by attaching a heat-resistant insulator such as ceramic paper 4 to the inner concave bottom part 2a of the plug part 2 of the lead wire attachment terminal 3, which has plug parts 2 made of an insulating material sealed on both sides of the fuse tube 1. It has a structure in which a gap 6 is formed in the center of the plug part 2 by matching the diameter difference between the lead wire attachment terminal 3 and the fuse terminal 5. 4 to prevent direct vapor deposition on the recessed fitting portion 2a.

これによって、しゃ耐波の絶縁回復を維持するものであ
った。This maintained the insulation recovery of wave resistance.

しかしながら、前述構造にあっては、絶縁抵抗値の改善
はなし得るが、短絡等の大電流しゃ断時におけるヒユー
ズの溶断ガス圧が、栓部２等の絶縁物を直撃する状態に
あり、絶縁物を***する恐れがあった。However, with the above-mentioned structure, although the insulation resistance value can be improved, the blowing gas pressure of the fuse at the time of high current interruption due to short circuit etc. directly hits the insulating material such as the plug part 2, and the insulating material is damaged. There was a risk that it would explode.

そこで、本考案ヒユーズしゃ断時のガス圧を、絶縁筒内
に設けた同絶縁筒の軸方向に移動可能なる仕切板にて緩
和し、前記ガス圧の絶縁物への直撃を防止して、絶縁物
の***といった恐れを皆無とした電線ヒユーズを提供す
るものである。Therefore, the gas pressure of this invention when the fuse is cut off is alleviated by a partition plate that is installed inside the insulating cylinder and is movable in the axial direction of the insulating cylinder, preventing the gas pressure from directly hitting the insulating material. This provides a wire fuse that eliminates the risk of things exploding.

以下、本考案を具体化した一実施例を図面について説明
すると次の通りである。An embodiment embodying the present invention will be described below with reference to the drawings.

第２図は本考案を実施した電線ヒユーズの縦断面図であ
る。FIG. 2 is a longitudinal sectional view of a wire fuse in which the present invention is implemented.

透明合成樹脂よりなる円筒状の絶縁筒７の両端内周面に
は、同じく合成樹脂よシなる円筒状の支持筒８，８′を
嵌合固着し、絶縁筒７より外部へ一端を突出した状態で
リード線接続端子９，１０をピン着１１．１２すると共
に、同絶縁筒７の両端外周は内周面を接着した樹脂性か
らなる保護カバー１３，１４にて密封されている。Cylindrical support tubes 8 and 8' also made of synthetic resin are fitted and fixed to the inner circumferential surfaces of both ends of the cylindrical insulating tube 7 made of transparent synthetic resin, and one end protrudes outside from the insulating tube 7. In this state, the lead wire connection terminals 9 and 10 are pinned 11 and 12, and the outer periphery of both ends of the insulating tube 7 is sealed with protective covers 13 and 14 made of resin and whose inner circumferential surfaces are adhered.

以下、前記絶縁筒７を、大電流しゃ断部Ａ１小電流しゃ
断部Ｂ及び絶縁空間部Ｃに区分した実施例図について説
明すると、 大電流しゃ断部Ａ１周囲に比重の小さい軽石等の無機物
質を円筒状に接着成形した通気性を有する消弧筒１５を
配設し、前記リード線接続端子９の内端に対しカシメ着
等により接続した銀線等のしゃ耐特性が優れ、しゃ断時
間も短く発生ガス量も少ない金属からなり、短絡等の大
電流しゃ断時にしゃ断し得る高温可溶体１６より構成す
る。Below, an example diagram in which the insulating tube 7 is divided into a large current breaker section A, a small current breaker section B, and an insulating space C will be explained. An arc extinguishing cylinder 15 having air permeability and adhesively molded in a shape is disposed, and the silver wire, etc. connected to the inner end of the lead wire connection terminal 9 by caulking etc. has excellent interruption resistance, and the interruption time is short. It is composed of a high temperature fusible material 16 which is made of a metal with a small amount of gas and can cut off when a large current is cut off due to a short circuit or the like.

小電流しゃ断部Ｂ及び絶縁空間部Ｃは、前記消弧筒１５
と図中右側の支持筒８′との間に収納した透明ガラスよ
シなる筒体１７の中間に、石線等の耐熱性絶縁部材から
なり、中心部に透孔１８ａを穿設してなる仕切板１８を
、同透孔１８ａに後記する導体２２を貫通させた状態に
て、前記絶縁筒７の軸線方向へ移動可能に嵌入すること
により仕切られた空隙である。The small current interrupting part B and the insulation space part C are connected to the arc extinguishing tube 15.
It is made of a heat-resistant insulating material such as stone wire, and a through hole 18a is bored in the center between a cylinder 17 made of transparent glass and housed between the support cylinder 8' on the right side in the figure. This is a space partitioned off by fitting a partition plate 18 movably in the axial direction of the insulating cylinder 7 with a conductor 22 (described later) passing through the through hole 18a.

小電流しゃ断部Ｂにあっては、前記高温可溶体１６の先
端部に対し、消弧筒１５の筒外部にてキャップ状接続端
子１９を介して−・ンダ付げ等のろう付は又はカシメ付
げによって接続した低溶融合金等よりなる低温可溶体２
０を内装し、過負荷等による過電流が所定時間以上流れ
た時にしゃ断する。In the small current interrupting part B, the top end of the high-temperature fusible body 16 is connected to the outside of the arc extinguishing cylinder 15 via a cap-shaped connecting terminal 19 by brazing such as soldering or by caulking. Low-temperature fusible body 2 made of low-melting alloy, etc. connected by bonding
0 internally, and shuts off when overcurrent due to overload, etc. flows for a predetermined time or more.

低温可溶体２０は接続部２１にろう付は等により導体２
２を介してリード線接続端子１０の内側にカシメ付は等
により接続する。The low-temperature fusible material 20 is connected to the conductor 2 by brazing the connecting part 21, etc.
2 to the inside of the lead wire connection terminal 10 by caulking or the like.

又、前記大電流しゃ断部Ａ１小電流しゃ断部Ｂは消弧筒
１５の両側に介装した石綿等ようなる緩衝用パツキン２
３，２３’の一方パッキン２３’の中間部に設けた通孔
２４を介して連通されている。Further, the large current breaker part A1 and the small current breaker part B are made of buffer gaskets 2 made of asbestos or the like interposed on both sides of the arc extinguisher cylinder 15.
3 and 23' are communicated through a through hole 24 provided in the middle of one of the packings 23'.

尚、本考案実施例にあっては通気性のよい消弧筒として
軽石を使用しているが、ホウ酸等の消弧性のある有機物
質を付着させるようにしてもよい。In the embodiment of the present invention, pumice stone is used as the arc-extinguishing tube with good air permeability, but an organic material having arc-extinguishing properties such as boric acid may be attached thereto.

ここで、前記のように構成した電線ヒユーズについてそ
の作用及び効果を説明する。Here, the operation and effects of the electric wire fuse configured as described above will be explained.

接続端子９，１０間に過負荷等による過電流が所定時間
以上流れると、低温可溶体２０が溶断する。When an overcurrent due to an overload or the like flows between the connection terminals 9 and 10 for a predetermined period of time or more, the low temperature fusible body 20 is fused.

この溶断状態は、透明の絶縁筒７及び筒体１７を通して
容易に確認することができる。This fused state can be easily confirmed through the transparent insulating cylinder 7 and cylinder body 17.

又、接続端子９，１０間に短絡等の大電流が流れると高
温可溶体１６が溶断し、溶断ガス及び爆音が発生する。Further, when a large current flows between the connection terminals 9 and 10 due to a short circuit or the like, the high temperature fusible body 16 is fused, and fusion gas and explosive noise are generated.

この際、溶断ガスの大半はガス圧により通気性を有する
消弧筒１５内に進入して消弧され、かつ爆音も吸収され
る。At this time, most of the fusing gas enters the arc-extinguishing cylinder 15 having air permeability due to the gas pressure and is extinguished, and the explosion noise is also absorbed.

一方、消弧筒１５により吸収できなかった残りの消弧ガ
スはガス圧により、大電流しゃ断部Ａから通孔２４を通
って小電流しゃ断部Ｂ内へ流入し、筒体１７の内周面に
金属等の融着物が蒸着し汚すので、高温可溶体１６の溶
断を筒体１７及び絶縁筒７を通して容易に確認し得る。On the other hand, the remaining arc-extinguishing gas that could not be absorbed by the arc-extinguishing cylinder 15 flows from the large current breaker part A through the through hole 24 into the small current breaker part B due to the gas pressure, and flows into the small current breaker part B from the large current breaker part A to the inner peripheral surface of the cylinder 17. Since fused materials such as metals are vapor deposited on and polluted, the melting of the high-temperature fusible material 16 can be easily confirmed through the cylinder 17 and the insulating cylinder 7.

本願は、このような電線ヒユーズとしての機能を充分に
発揮し得るに当たり、特に短絡しゃ断時に発生するしゃ
断ガス圧を仕切板１８が受け、同仕切板１８の導体２２
を介しての絶縁空間部Ｃ内での移動動作にて緩和し、支
持筒等の絶縁物へのガス圧の直撃を防止して、絶縁物の
***といった恐れを確実に回避し得るものである。In the present application, in order to fully exhibit the function as such an electric wire fuse, the partition plate 18 receives the cutoff gas pressure generated especially when the short circuit is cut off, and the conductor 22 of the partition plate 18
It is possible to reduce the gas pressure by moving within the insulating space C through the gas pressure, prevent the gas pressure from directly hitting the insulating material such as the support tube, and reliably avoid the risk of explosion of the insulating material. .

更に、仕切板へのしゃ断ガスの直撃に伴い、金属等の融
着物を小電流しゃ断部Ｂの筒体１７の内周に瞬時に蒸着
させ、緩和に伴う仕切板の移動、破損により、溶断ガス
が絶縁空間部Ｃへ流入したとしても、蒸着量は少ないた
め小電流しゃ断部Ｂ内における蒸着膜は、仕切板の設定
部分にて切り離されることとなる。Furthermore, due to the direct impact of the cutoff gas on the partition plate, a fused material such as metal is instantly deposited on the inner circumference of the cylinder 17 of the small current cutoff section B, and as the partition plate moves and breaks due to relaxation, the cutoff gas Even if the vapor flows into the insulating space C, the amount of vapor deposited is small, so the vapor deposited film in the small current cutoff part B is separated at the set portion of the partition plate.

よって、両リード線接続端子９〜１０間に連通ずる絶縁
筒内面全面に金属等の融着物が付着して沿面を介して、
両端子間の絶縁抵抗が低下するといったことはなく、シ
ゃ断不能となることはない。Therefore, fused materials such as metal adhere to the entire inner surface of the insulating cylinder communicating between both lead wire connection terminals 9 and 10, and pass through the creeping surface.
The insulation resistance between both terminals does not decrease, and there is no possibility that the circuit cannot be disconnected.

尚、本願実施例の電線ヒユーズにあっては、大電流しゃ
断部Ａ１小電流しゃ断部Ｂ及び絶縁空間部Ｃに区分し、
大電流しゃ断部Ａには軽石等の無機物質からなる通気性
を有する消弧筒を配したが、本願は単にこの構造に限定
されるものではなく、又、他の小電流しゃ断部及び絶縁
空間部についても同様であり、しゃ断部として大電流し
ゃ断部及び小電流しゃ断部を有する電線ヒユーズを指す
ものである。In addition, in the electric wire fuse of the embodiment of the present application, it is divided into a large current breaker section A, a small current breaker section B, and an insulating space section C.
Although a breathable arc-extinguishing cylinder made of an inorganic material such as pumice is arranged in the large current interrupting part A, the present application is not limited to this structure. The same applies to the section, and refers to a wire fuse having a large current interrupting section and a small current interrupting section as the interrupting section.

以上述べたように本考案は、大電流しゃ断部と小電流し
ゃ断部とを直列配置した絶縁筒内に耐熱性絶縁部材より
なる仕切板を移動可能に介装した簡単なる構造にて、従
来電線ヒユーズの欠陥であったヒユーズしゃ断時に発生
するしゃ断ガスによる絶縁物への直撃を緩和阻止し、又
、ヒユーズしゃ断後の接続端子間の絶縁抵抗を充分に保
持し得る効果を有するものであり、産業上大いに利用し
得る考案である。As described above, the present invention has a simple structure in which a partition plate made of a heat-resistant insulating material is movably interposed in an insulating tube in which a large current breaker and a small current breaker are arranged in series. It has the effect of mitigating and preventing the direct impact of the cutoff gas generated when the fuse is cut off on the insulator, which was a defective fuse, and of maintaining sufficient insulation resistance between the connecting terminals after the fuse has been cut off. This is a very useful idea.

曾た、本願電線ヒユーズでは、仕切板１８を製作時に導
体２２に対し、その透孔１８ａを介して筒体１７内に挿
入するだけである為、製作組立を容易に行うことができ
る。In addition, in the electric wire fuse of the present invention, since the partition plate 18 is simply inserted into the cylindrical body 17 through the through hole 18a of the conductor 22 at the time of manufacture, manufacturing and assembly can be easily performed.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、従来における電線ヒユーズのしゃ断後の絶縁
抵抗回復構造を示す一側リード線接続端子部の断面図で
ある。 第２図は、本考案を具体化した電線ヒユーズの縦断面図
である。 ７・・・・・・絶縁筒、８，８′・・・・・・支持筒、
９，１０・・・・・・リード線接続端子、１３，１４・
・・・・・保護カバー１５・・・・・・保護カバー、１
６・・・・・・高温可溶体、１７・・・・・・筒体、１
８・・・・・・仕切板、２０・・・・・・低温可溶体。FIG. 1 is a cross-sectional view of one side lead wire connection terminal portion showing a conventional insulation resistance recovery structure after disconnection of a wire fuse. FIG. 2 is a longitudinal sectional view of a wire fuse embodying the present invention. 7... Insulating tube, 8, 8'... Support tube,
9, 10... Lead wire connection terminal, 13, 14.
...Protective cover 15...Protective cover, 1
6... High temperature soluble body, 17... Cylindrical body, 1
8... Partition plate, 20... Low temperature soluble material.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 透明絶縁材よりなる耐爆絶縁筒内に、大電流しゃ断部と
小電流しゃ断部とを直列的に内装する電線ヒユーズにお
いて、前記絶縁筒内に前記大小しゃ断部と前記絶縁筒の
両側へ突設するリード線接続端子とを電気的に接続する
導体を介して前記絶縁筒体内に同筒体の軸方向に対し移
動可能なる仕切板を配設したことを特徴とする電線ヒユ
ーズ。In a wire fuse in which a large current breaker and a small current breaker are installed in series in an explosion-proof insulating cylinder made of a transparent insulating material, the large and small current breaker is provided inside the insulating cylinder and protrudes from both sides of the insulating cylinder. An electric wire fuse characterized in that a partition plate movable in the axial direction of the insulating cylinder is disposed within the insulating cylinder via a conductor that electrically connects the lead wire connecting terminal.