JP3194629U

JP3194629U - fuse

Info

Publication number: JP3194629U
Application number: JP2014005218U
Authority: JP
Inventors: 紀男長内
Original assignee: 株式会社アサヒ電機製作所
Priority date: 2014-09-11
Filing date: 2014-09-11
Publication date: 2014-12-04
Anticipated expiration: 2024-09-11

Abstract

【課題】通電による経年劣化を抑制し、過電流による溶断及び遮断時に発生する筒体のひび、割れ、破裂等を防止できるヒューズを提供する。【解決手段】ヒューズ筒４と四角状の支持棒１０には磁器を用い、支持棒には、その両端に銅細線のリード線１ｂを所要長の間隔で巻付け固定し、さらに、この巻付け間隔間に銀細線のヒューズ線１ｃを支持棒にスパイラル状に巻付けて、その先端と末端部をはんだ１０で接合したヒューズ素子体１を形成し、このヒューズ素子体を、両端にカップ状の金属製キャップ２が嵌着可能な端子部を有し、中央部の外径を大きくした異形状の筒内に消弧剤５とともに収納した。【選択図】図３The present invention provides a fuse capable of suppressing deterioration over time due to energization and preventing cracking, cracking, rupture, etc. of a cylindrical body that occurs at the time of fusing and breaking due to overcurrent. Porcelain is used for the fuse cylinder 4 and the square support rod 10, and lead wires 1b of copper fine wires are wound and fixed at both ends of the support rod at intervals of a required length. A silver thin wire 1c is spirally wound around a support rod between intervals to form a fuse element body 1 having its tip and end joined with solder 10, and the fuse element 1 is cupped at both ends. The metal cap 2 has a terminal part into which the metal cap 2 can be fitted, and is housed together with the arc-extinguishing agent 5 in an irregularly shaped cylinder having a larger outer diameter at the center part. [Selection] Figure 3

Description

本考案は、車輌用関連の特に、路面電車等の電気系統の直流ヒューズの改良に関する。The present invention relates to an improvement in a DC fuse of an electric system such as a tram, particularly for vehicles.

従来より路面電車等で使用されている直流ヒューズは、図１に示すように、鉛を主体とした鉛棒（イ）を輪状にし、この両端に銅細線（ロ）を接合したヒューズ素子として用い、これを紙基材からなるファイバー筒（ハ）内に粒状の炭酸カルシウム（ニ）とともに充填して、前記ファイバー筒の両端に金属製キャップ（ホ）を被せ、これを釘（ヘ）で固定した構造のものが公知とされている。As shown in FIG. 1, a DC fuse conventionally used in a streetcar or the like is used as a fuse element in which a lead rod (A) mainly composed of lead is formed in a ring shape and copper wires (B) are joined to both ends. This is filled into a fiber tube (c) made of paper base together with granular calcium carbonate (d), covered with metal caps (e) on both ends of the fiber tube, and fixed with nails (f) Those having the above structure are known.

この構造の直流ヒューズは、利点としてはヒューズ素子に溶融点の低い元素である鉛を用いていることから温度上昇がそれ程高くならない内に溶断、遮断ができることや、比較的小さな過電流通過に対して速断しな性能を持っており捨てがたい存在でもある。The DC fuse of this structure has the advantage that lead, which is an element with a low melting point, is used for the fuse element, so that it can be blown and cut off while the temperature rise is not so high, and it can withstand relatively small overcurrent passage. In addition, it has fast performance and is difficult to throw away.

しかしながら、時代背景を含め将来的見地からも次のような問題がある。
（１）ヒューズ素子に用いている化学元素である鉛自体、世界的にも環境面から有害物質として淘汰される方向にあることからこれを遵守しなくてはならないため将来的には使用不可物質である。
（２）筒の材質であるファイバーは、もともと紙基材であることから通電時及び溶断、遮断時にヒューズ素子から発生するジュール熱で筒の内面が炭化され易く、焦げたり、発火するという懸念があった。
また、耐候性能にも限界がある。例えば、湿度変化、温度変化による乾燥、吸湿の繰返しによるキャップとの接合部のガタ及びゆるみ等が生じ易い。
（３）消弧剤として充填の粒状の炭酸カルシウムも化学的特性から吸湿性が強い物質であることから絶縁性にも問題がある。However, there are the following problems from a future perspective including the background of the times.
(1) Lead itself, which is a chemical element used in fuse elements, is in the direction of being regarded as a hazardous substance from an environmental standpoint worldwide. It is.
(2) Since the fiber that is the material of the tube is originally a paper base material, there is a concern that the inner surface of the tube is easily carbonized due to Joule heat generated from the fuse element during energization, fusing, and shutting off, and it may burn or ignite. there were.
There is also a limit to the weather resistance. For example, looseness and looseness of the joint with the cap due to repeated humidity change, temperature change, and moisture absorption are likely to occur.
(3) Filled granular calcium carbonate as an arc-extinguishing agent is also a substance having a strong hygroscopic property due to its chemical characteristics, and thus has a problem in insulation.

本考案は、上述の（１）〜（３）のような従来技術の問題点を解消すべくなされたもので、ヒューズ筒内に耐熱性絶縁材の磁器と遮断特性の優れた銀細線からなるヒューズ素子と、さらに吸湿性のない硅砂からなる消弧剤を充填した密閉形ヒューズを構成することを目的とする。The present invention has been made to solve the problems of the prior art as described in the above (1) to (3), and is composed of a heat-resistant insulating porcelain in a fuse cylinder and a silver thin wire excellent in breaking characteristics. It is an object of the present invention to constitute a hermetic fuse filled with a fuse element and an arc extinguishing agent made of non-hygroscopic sand.

Means to solve the problem

本考案は上記の目的を達成するために、ヒューズ筒と四角状の支持棒には磁器を用い、前記支持棒には、その両端に銅細線のリード線を所要長の間隔で巻付け固定し、さらに、この巻付け間隔間に銀細線のヒューズ線を支持棒にスパイラル状に巻付けて、その先端と末端部をはんだで接合したヒューズ素子体を形成し、このヒューズ素子体を、両端にカップ状の金属製キャップが嵌着可能な端子部を有し、中央部の外径を大きくした異形状の筒内に消弧剤とともに収納したヒューズを提供する。In order to achieve the above object, the present invention uses a porcelain for the fuse cylinder and the square support rod, and the support rod is fixed by wrapping copper lead wires at both ends of the support rod at a predetermined length. Further, a silver thin wire is wound spirally around the support rod between the winding intervals to form a fuse element body in which the tip and the end are joined with solder, and the fuse element body is attached to both ends. Provided is a fuse that has a terminal portion into which a cup-shaped metal cap can be fitted, and is housed together with an arc-extinguishing agent in a deformed cylinder having a larger outer diameter at the center.

Effect of device

ヒューズ素子体の収納部が、磁器筒の中央部の外径を大きくした部分の位置になることから容積率も増加することで、従来より高電圧での遮断状況が良好となり、安全性が高くなる。Since the fuse element housing is located at the position where the outer diameter of the central part of the porcelain cylinder is increased, the volume ratio also increases, resulting in better shut-off conditions at higher voltages and higher safety. Become.

従来のヒューズの断面図Cross section of a conventional fuse 本考案のヒューズのヒューズ素子体の構成斜視図Configuration perspective view of fuse element body of fuse of the present invention 本考案ヒューズの断面図Cross section of the fuse

ヒューズ筒中央部が両端より外径が大きいことで従来のヒューズホルダに適合できなくなるという懸念は一切無い。There is no concern that the center of the fuse cylinder has a larger outer diameter than both ends, making it impossible to fit the conventional fuse holder.

以下、本考案ヒューズの一実施例を図面により説明する。
図２は本考案品に使用されるヒューズ素子体の構成斜視図であり、この図に示す通り、四角状の支持棒１ａは磁器からなり、この長手方向の両端には、銅のリード線１ｂを巻付け間隔間を設けて固定するようにし、さらに、この間隔間に銀からなる細いヒューズ線１ｃをスパイラル状に巻付け、前記リード線１ｂの先端と末端部にはんだ１０でそれぞれ接合により構成のヒューズ素子体１を用いている。Hereinafter, an embodiment of the fuse of the present invention will be described with reference to the drawings.
FIG. 2 is a structural perspective view of a fuse element body used in the present invention product. As shown in this figure, the square support bar 1a is made of porcelain, and copper lead wires 1b are provided at both ends in the longitudinal direction. And a thin fuse wire 1c made of silver is spirally wound between the intervals, and the lead wire 1b is joined to the front end and the end portion by solder 10 respectively. The fuse element body 1 is used.

図３は本考案のヒューズの断面図であるが、この図で示すように、左右の所要長の磁器筒の一端に黄銅の金属製キャップ２を嵌着した一対の第一の筒３を、この第一の筒３の外径部が嵌合できるような内径を有する所要全長と外径部を有する第二の筒４を組み合わせた状態の異形状筒を形成したものを用いている。FIG. 3 is a cross-sectional view of the fuse of the present invention. As shown in this figure, a pair of first cylinders 3 each having a brass metal cap 2 fitted to one end of a left and right porcelain cylinder, What formed the unusually-shaped cylinder of the state which combined the required full length which has an internal diameter which can fit the outer diameter part of this 1st cylinder 3, and the 2nd cylinder 4 which has an outer diameter part is used.

ヒューズ素子体１の左右のリード線１ｂは第一の筒３に嵌着の金属製キャップ２にそれぞれはんだ１０で接合される。
この状態では、意図的にヒューズ線１ｃは第二の筒４の部分、すなわち、容積の大きい箇所に収納されることから、遮断性能上に極めて有利になる。
この理由は、従来品ヒューズと本考案品ヒューズの第一の筒３と第二の筒４の内容積の比較では、前者をｄ_１、後者をｄ_２とすれば、ｄ_１＜ｄ_２（ｍｍ）で約２倍程度の容積率になることからも明白である。The left and right lead wires 1b of the fuse element body 1 are joined to the metal cap 2 fitted to the first tube 3 by solder 10 respectively.
In this state, the fuse wire 1c is intentionally housed in the portion of the second cylinder 4, that is, a portion having a large volume, which is extremely advantageous in terms of breaking performance.
This is because in the comparison of the internal volumes of the first cylinder 3 and the second cylinder 4 of the conventional product fuse and the present invention product fuse, if the former is d ₁ and the latter is d ₂ , d ₁ <d ₂ ( It is also clear from the fact that the volume ratio is about twice as large in mm).

本考案のヒューズの一実施例は、以上のような構成からなるものであり、本考案品が外形上において筒形状が異形にはなるが、全長、ヒューズ端子径等は従来品と同一寸法であることから既設のヒューズホルダに適合できるので互換性を有するものである。One embodiment of the fuse of the present invention is configured as described above, and although the present invention product has an irregular cylindrical shape on the outer shape, the overall length, fuse terminal diameter, etc. are the same dimensions as the conventional product. Since it is compatible with existing fuse holders, it has compatibility.

１ヒューズ素子体
２金属製キャップ
３第一の筒
４第二の筒
１０はんだDESCRIPTION OF SYMBOLS 1 Fuse element body 2 Metal cap 3 1st pipe | tube 4 2nd pipe | tube 10 Solder

Claims

In a hermetic type fuse having a metal terminal portion at both ends of a hollow cylindrical heat-resistant insulating material tube, and a fuse element body filled with a granular arc extinguishing agent inside the tube, Porcelain is used for the support rod, and copper lead wires are wound and fixed at both ends of the support rod at intervals of the required length. Further, the silver thin wire fuse wire is supported between the winding intervals. A fuse element body is formed by winding the rod in a spiral shape and joining the tip and end portions thereof with solder, and the fuse element body has terminal portions to which cup-shaped metal caps can be fitted at both ends. A fuse characterized by being housed together with an arc-extinguishing agent in an irregularly shaped cylinder having a larger outer diameter at the center.