JPS621735Y2 - - Google Patents
Info
- Publication number
- JPS621735Y2 JPS621735Y2 JP3946780U JP3946780U JPS621735Y2 JP S621735 Y2 JPS621735 Y2 JP S621735Y2 JP 3946780 U JP3946780 U JP 3946780U JP 3946780 U JP3946780 U JP 3946780U JP S621735 Y2 JPS621735 Y2 JP S621735Y2
- Authority
- JP
- Japan
- Prior art keywords
- resistance wire
- fuse
- fuse element
- wire
- thermal paper
- 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
Links
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 229910000743 fusible alloy Inorganic materials 0.000 claims description 6
- 239000000155 melt Substances 0.000 claims description 2
- 230000004927 fusion Effects 0.000 claims 1
- 238000002844 melting Methods 0.000 description 4
- 230000008018 melting Effects 0.000 description 4
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 238000005338 heat storage Methods 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
- Fuses (AREA)
Description
【考案の詳細な説明】
本考案は配電線路における引込線の過電流によ
る事故を防止する完全密閉型電線ヒユーズにおけ
る溶断表示装置の改良に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement of a blowout indicator in a completely enclosed electric wire fuse that prevents accidents caused by overcurrent in service lines in power distribution lines.
第１図は本考案に係る完全密閉型の電線ヒユー
ズの一例を示すもので、図中１は銀線製のヒユー
ズエレメントで、２はその中央部に嵌着した銅製
の蓄熱体、３はヒユーズエレメント１の両端部に
それぞれ圧着接続した銅製の圧着ピン、４はこの
圧縮ピン３にそれぞれ嵌合接続した銅管端子、５
はこれら銅管端子４，４間を外包するようにかぶ
せた合成樹脂（ポリエステル）製の内筒、６はこ
の内筒５の開放端部に嵌着した合成樹脂製の内蓋
７は内筒５、内蓋６、銅管端子４、およ圧縮ピン
３を貫通する接続ピン、８はこれら両端部の接続
ピン７を介してヒユーズエレメント１と並列に接
続した抵抗線で、第２図に示すように内筒５の外
周に螺旋状に巻回してある。９はこの抵抗線８の
外周に巻回した感熱紙、１０はさらに感熱紙９の
外周にかぶせた透明樹脂（ポリカーボネイト）製
の外筒、１１，１２は外筒１０の両端部にそれぞ
れ嵌着した合成樹脂（塩ビ）製のキヤツプであ
る。なお１３は内筒５の内周部に嵌合した補強用
円筒である。 Figure 1 shows an example of a completely sealed electric wire fuse according to the present invention. In the figure, 1 is a fuse element made of silver wire, 2 is a copper heat storage body fitted in the center, and 3 is a fuse element. Copper crimp pins are crimped and connected to both ends of the element 1, 4 are copper tube terminals that are respectively fit and connected to the compression pins 3, and 5 are
6 is an inner cylinder made of synthetic resin (polyester) that covers the copper tube terminals 4, 4, and 6 is an inner cylinder made of synthetic resin that is fitted onto the open end of the inner cylinder 5. 5, a connecting pin that passes through the inner cover 6, the copper tube terminal 4, and the compression pin 3; 8 is a resistance wire connected in parallel to the fuse element 1 via the connecting pins 7 at both ends; As shown, it is wound spirally around the outer periphery of the inner cylinder 5. 9 is a thermal paper wrapped around the outer circumference of the resistance wire 8; 10 is an outer tube made of transparent resin (polycarbonate) that is further placed over the outer circumference of the thermal paper 9; 11 and 12 are fitted to both ends of the outer tube 10, respectively. The cap is made of synthetic resin (PVC). Note that 13 is a reinforcing cylinder fitted to the inner peripheral portion of the inner cylinder 5.
しかして従来の溶断表示装置はヒユーズエレメ
ント１と並列に、高抵抗でかつ溶融点の高い抵抗
線８を第２図に示すように内筒５に巻きつけたも
ので、このヒユーズエレメント１と抵抗線８の抵
抗値の差が大きいため、常時使用中は全く抵抗線
８には電流は流れず、ヒユーズエレメント１が溶
断した場合に始めて抵抗線８に電流が流れ、これ
によるジユール熱により抵抗線８を溶断し、抵抗
線８に巻きつけた感熱紙（ネームプレート）９に
焦跡を作り、これを感熱紙９の外部にかぶせた透
明な外筒１０を介して目視することによりヒユー
ズエレメント１が溶断したことを確認できる構造
になつている。このため非常にまれなケースであ
るが、何かの理由でヒユーズエレメント１の溶断
している電線ヒユーズを使用した場合、例えば需
要家の計器取替の際に誤つて引込線を短絡させて
ヒユーズを溶断させたとか、或は製造工程中に誤
つてヒユーズエレメント１を切断したものをその
まま製品として出荷して使用した場合に、需要家
の負荷が４〜6A程度であると、抵抗線８が溶断
するまでに時間を要し、この間抵抗線８を溶融点
が高いため周囲の部材の温度があがり、抵抗線８
の溶断前に周囲部材、例えば内筒５および外筒１
０が発火するという欠点があつた。 However, in the conventional fuse element 1, a resistance wire 8 having a high resistance and a high melting point is wound around an inner cylinder 5 in parallel with the fuse element 1, as shown in FIG. Due to the large difference in the resistance values of the wires 8, no current flows through the resistance wire 8 during regular use, and current flows through the resistance wire 8 only when the fuse element 1 blows out, and the resulting heat from the wire causes the resistance wire to fuse element 1 by fusing 8 and creating a burn mark on thermal paper (name plate) 9 wrapped around resistance wire 8, and visually observing this through a transparent outer cylinder 10 that covers the outside of thermal paper 9. It has a structure that allows you to confirm that it has fused. Therefore, in very rare cases, if a blown wire fuse of fuse element 1 is used for some reason, for example, when a consumer replaces a meter, the service wire may be short-circuited by mistake and the fuse may be damaged. If the fuse element 1 is melted or accidentally cut during the manufacturing process and is shipped and used as a product, the resistance wire 8 may melt if the customer's load is about 4 to 6 A. During this time, the temperature of the surrounding members increases because the resistance wire 8 has a high melting point, and the resistance wire 8
The surrounding members, for example, the inner cylinder 5 and the outer cylinder 1, are
There was a drawback that 0 would catch fire.
本考案は上述の欠点を除去するため考案したも
ので、どのような場合においても発火するおそれ
のない電線ヒユーズを提供することを目的とする
ものである。 The present invention has been devised to eliminate the above-mentioned drawbacks, and its object is to provide a wire fuse that is free from the risk of catching fire under any circumstances.
以下図面について本考案の実施例を説明する。
すなわち本考案においては、ヒユーズエレメント
１の周囲部材、例えば内筒５および外筒１０の着
火温度よりはるかに低い温度で溶融する低溶融合
金１４を第４図に示すように抵抗線８の途中に介
挿し、これを第３図に示すように内筒５の外周に
螺旋状に巻回して、その抵抗線８の両端をそれぞ
れ接続ピン７に接続することにより、ヒユーズエ
レメント１と並列に接続する。 Embodiments of the present invention will be described below with reference to the drawings.
That is, in the present invention, a low-melting alloy 14 that melts at a temperature far lower than the ignition temperature of the surrounding members of the fuse element 1, such as the inner cylinder 5 and the outer cylinder 10, is placed in the middle of the resistance wire 8 as shown in FIG. The resistance wire 8 is connected in parallel with the fuse element 1 by inserting the resistance wire 8, winding it spirally around the outer circumference of the inner cylinder 5 as shown in FIG. 3, and connecting both ends of the resistance wire 8 to the connection pins 7, respectively. .
本考案の電線ヒユーズは上述のように構成した
から、たとえこのヒユーズエレメント１が溶断し
ているものを、４〜6A程度の需要家にとりつけ
た場合でも、わずかのジユール熱により低溶融合
金１４が溶断するので、抵抗線８の周囲部材が発
火するおそれがない。またこの低溶融合金１４の
溶融点があまり低すぎると、抵抗線８に生ずるジ
ユール熱が小さくなり感熱紙９に焦跡を残さなく
なるので、この点も考慮に入れて抵抗線８の周囲
部材が発火することのない溶融点の低溶融合金１
４を採用することが必要である。 Since the electric wire fuse of the present invention is constructed as described above, even if this fuse element 1 is fused and installed in a consumer of about 4 to 6 A, the low melting alloy 14 will be damaged by a small amount of fuse heat. Since the resistance wire 8 is fused, there is no risk that the surrounding members of the resistance wire 8 will catch fire. Furthermore, if the melting point of the low-melting alloy 14 is too low, the heat generated in the resistance wire 8 will be small and will not leave a burn mark on the thermal paper 9. Therefore, taking this into consideration, the surrounding members of the resistance wire 8 should be Low-melting alloy with a low melting point that does not catch fire 1
It is necessary to adopt 4.
本考案電線ヒユーズの溶断表示装置は上述の通
りであるから、この装置を付した電線ヒユーズは
どのような場合においても発火するおそれがない
という安全上すぐれた効果がある。 Since the blown indicator device for the electric wire fuse of the present invention is as described above, the electric wire fuse equipped with this device has an excellent safety effect in that there is no risk of ignition under any circumstances.
第１図は本考案に係る電線ヒユーズの縦断面
図、第２図は従来の抵抗線の装着状態を示す部分
部、第３図は本考案による抵抗線の装着状態を示
す部分図、第４図はその抵抗線の展張図である。
１……ヒユーズエレメント、２……蓄熱体、３
……圧縮ピン、４……銅管端子、５……内筒、６
……内蓋、７……接続ピン、８……抵抗線、９…
…感熱紙、１０……外筒、１１，１２……キヤツ
プ、１３………補強用内筒、１４……低溶融合
金。
Fig. 1 is a longitudinal sectional view of the electric wire fuse according to the present invention, Fig. 2 is a partial view showing a conventional resistance wire installed state, Fig. 3 is a partial view showing a resistance wire fitted state according to the present invention, and Fig. 4 The figure is an expanded diagram of the resistance line. 1...Fuse element, 2...Heat storage body, 3
...Compression pin, 4...Copper tube terminal, 5...Inner cylinder, 6
...Inner lid, 7...Connection pin, 8...Resistance wire, 9...
...Thermal paper, 10... Outer tube, 11, 12... Cap, 13... Inner tube for reinforcement, 14... Low melting alloy.
Claims (1)
したものに内筒をかぶせ、この内筒の外周に設け
た抵抗線をヒユーズエレメントと並列に接続し、
この抵抗線の外周に感熱紙を被着すると共に、こ
の感熱紙を透明な外筒で被覆した電線ヒユーズに
おいて、ヒユーズエレメント周囲部材の着火温度
より低い温度で溶融する低溶融合金を前記抵抗線
の途中に介挿してなる電線ヒユーズの溶断表示装
置。 Copper tube terminals are connected to both ends of the fuse element, an inner tube is placed over the fuse element, and a resistance wire provided around the outer circumference of the inner tube is connected in parallel with the fuse element.
In an electric wire fuse in which the outer periphery of the resistance wire is coated with thermal paper and the thermal paper is covered with a transparent outer cylinder, a low-melting alloy that melts at a temperature lower than the ignition temperature of the surrounding members of the fuse element is applied to the resistance wire. A fusion indicator for a wire fuse inserted in the middle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3946780U JPS621735Y2 (en) | 1980-03-27 | 1980-03-27 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3946780U JPS621735Y2 (en) | 1980-03-27 | 1980-03-27 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS56142477U JPS56142477U (en) | 1981-10-27 |
| JPS621735Y2 true JPS621735Y2 (en) | 1987-01-16 |
Family
ID=29634923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3946780U Expired JPS621735Y2 (en) | 1980-03-27 | 1980-03-27 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS621735Y2 (en) |
-
1980
- 1980-03-27 JP JP3946780U patent/JPS621735Y2/ja not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS56142477U (en) | 1981-10-27 |
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