JP2001118482A - Circuit breaker - Google Patents
Circuit breakerInfo
- Publication number
- JP2001118482A JP2001118482A JP29601199A JP29601199A JP2001118482A JP 2001118482 A JP2001118482 A JP 2001118482A JP 29601199 A JP29601199 A JP 29601199A JP 29601199 A JP29601199 A JP 29601199A JP 2001118482 A JP2001118482 A JP 2001118482A
- Authority
- JP
- Japan
- Prior art keywords
- coil spring
- circuit breaker
- wire
- circuit
- stainless steel
- 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
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H69/00—Apparatus or processes for the manufacture of emergency protective devices
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、配線用遮断器、漏
電遮断器などに使用される回路遮断器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a circuit breaker used for a circuit breaker, a ground fault circuit breaker and the like.
【０００２】[0002]
【従来の技術】従来の回路遮断器を図１および図２を参
照しながら説明する。図１および図２は、電気設備にお
ける回路の電気的保護のために用いられている回路遮断
器の一例である漏電遮断器を表している。図示する漏電
遮断器は、ケース１、カバー２、電源側端子３、先端に
固定接点４ａを備えた固定接触子４、先端に可動接点５
ａを設けた可動接触子５、可動リード線６、負荷側端子
７、ハンドル８、バイメタル９、過電流および漏電電流
のトリップ装置１０、ならびに該バイメタルおよびトリ
ップ装置に連動して回路を機械的に遮断するリンク機構
１１を備えている。このリンク機構１１は、ラッチ１１
ａを有しており、このラッチ１１ａは、可動接触子５と
コイルばね１１ｂにより保持されている。2. Description of the Related Art A conventional circuit breaker will be described with reference to FIGS. 1 and 2 show an earth leakage breaker which is an example of a circuit breaker used for electrical protection of a circuit in electrical equipment. The illustrated earth leakage breaker includes a case 1, a cover 2, a power supply side terminal 3, a fixed contact 4 having a fixed contact 4a at a tip, and a movable contact 5 at a tip.
The movable contact 5, the movable lead wire 6, the load side terminal 7, the handle 8, the bimetal 9, the overcurrent and the leakage current trip device 10 provided with a, and the circuit is mechanically operated in conjunction with the bimetal and the trip device. A link mechanism 11 for shutting off is provided. The link mechanism 11 includes a latch 11
The latch 11a is held by the movable contact 5 and the coil spring 11b.
【０００３】このような構成からなる回路遮断器は、ハ
ンドルを操作することにより、コイルばねが反転して支
軸基部を揺動支点として可動接触子が動く。そして可動
接点が固定接点と接合していたＯＮ状態（図１）から、
可動接点が固定接点から離れたＯＦＦ状態（図２）とな
る。In the circuit breaker having such a configuration, when the handle is operated, the coil spring is reversed, and the movable contact moves with the pivot base as the swinging fulcrum. Then, from the ON state (FIG. 1) in which the movable contact is joined to the fixed contact,
The movable contact is in the OFF state (FIG. 2) away from the fixed contact.
【０００４】固定接点４ａと可動接点５ａの接触してい
るＯＮ状態（図１）において、電流は、電源側端子３か
らこれと一体の固定接触子４、固定接点４ａ、可動接点
５ａ、これが接続された固定接触子５へと流れ、続いて
固定接触子５の一端が接合された可動リード線６、その
可動リード線の他端が接合されたバイメタル９、そして
負荷側端子７に流れる。このとき、主回路に過電流、漏
電電流などの異常電流が発生するとバイメタル９が検知
して作動する。すると、トリップ装置１０が作動し、リ
ンク機構１１のラッチ１１ａが解放され、コイルばね１
１ｂが反転する。このコイルばねの反転により可動接触
子５が動き、可動接点５ａが固定接点４ａから離れて電
流を遮断してＯＦＦ状態（図２）となる。In the ON state (FIG. 1) in which the fixed contact 4a and the movable contact 5a are in contact with each other, the current flows from the power supply terminal 3 to the fixed contact 4, the fixed contact 4a, and the movable contact 5a, which are integrated therewith. The fixed contact 5 flows to the movable lead wire 6 to which one end of the fixed contact 5 is joined, the bimetal 9 to which the other end of the movable lead wire is joined, and the load-side terminal 7. At this time, when an abnormal current such as an overcurrent or a leakage current occurs in the main circuit, the bimetal 9 detects and operates. Then, the trip device 10 is operated, the latch 11a of the link mechanism 11 is released, and the coil spring 1
1b is inverted. The movable contact 5 moves due to the reversal of the coil spring, and the movable contact 5a separates from the fixed contact 4a to cut off the current to be turned off (FIG. 2).
【０００５】ここで、従来の回路遮断器を高電流用とし
て用いる場合、ＯＮ状態での可動接点および固定接点を
押圧するためのコイルばね荷重が不十分であると、接点
の温度上昇が大きくなり、接点や端子部の温度がＪＩＳ
規格（Ｃ８３７１）を満足しない。そこで、高い強度を
有するコイルばねが要求されている。従来では、このコ
イルばねとして、ステンレス鋼線の中でも高い強度を可
能とするＳＵＳ３０４線材、あるいはピアノ線などを用
いていた。When a conventional circuit breaker is used for a high current, if the coil spring load for pressing the movable contact and the fixed contact in the ON state is insufficient, the temperature rise of the contact becomes large. , Temperature of contacts and terminals is JIS
Does not satisfy the standard (C8371). Therefore, a coil spring having high strength is required. Conventionally, as the coil spring, a SUS304 wire or a piano wire, which enables high strength among stainless steel wires, has been used.
【０００６】[0006]
【発明が解決しようとする課題】しかし、従来用いられ
ているステンレス鋼線材は、限られたスペースの中で回
路遮断器中のコイルばねに必要とされる高い強度特性を
得ることが困難である。そこで、通常のステンレス鋼
に、冷間加工による加工硬化によって必要な強度を付与
する試みがされている。また、強加工するためには、よ
り大きな加工率を与えることになる。しかし、そのよう
な強加工したステンレス鋼線のばね製品は、繰り返し疲
労特性に劣り、寿命低下の一因となることが知られてい
る。したがって、このようなステンレス鋼線のばね製品
は、一般にＪＩＳ規格（Ｃ８３７１）に定められた回路
遮断器としての特性を満足することが困難である。However, it is difficult for the conventionally used stainless steel wires to obtain the high strength characteristics required for a coil spring in a circuit breaker in a limited space. . Therefore, attempts have been made to impart necessary strength to ordinary stainless steel by work hardening by cold working. Further, in order to perform strong working, a larger working rate is given. However, it is known that such a strongly processed stainless steel wire spring product is inferior in repeated fatigue characteristics and contributes to shortening of service life. Therefore, it is generally difficult for such a stainless steel wire spring product to satisfy the characteristics as a circuit breaker specified in JIS standard (C8371).
【０００７】一方、ピアノ線を用いたコイルばねは、高
い強度を有する一方、耐食性に劣る。そのため、例えば
事前にピアノ線表面に皮膜処理することが必要となる結
果、コストアップを招いたり、被膜の品質管理等が必要
となるなどの解決すべき課題を有する。On the other hand, a coil spring using a piano wire has high strength, but is inferior in corrosion resistance. For this reason, for example, it is necessary to perform a film treatment on the surface of the piano wire in advance, which causes problems such as an increase in cost and a need for quality control of the film.
【０００８】そこで、本発明では高い強度を有し、繰り
返し疲労特性に優れ、さらに耐食性の高いコイルばねを
用いた回路遮断器を提供することを目的とする。Accordingly, an object of the present invention is to provide a circuit breaker using a coil spring having high strength, excellent repetitive fatigue characteristics, and high corrosion resistance.
【０００９】[0009]
【課題を解決するための手段】上記問題を解決するため
に、本発明に基づく回路遮断器は、回路中に発生した異
常電流を検知する検知手段と、該検知手段に連動して回
路を機械的に遮断するリンク機構と、可動接触子とを備
え、前述のリンク機構が前述の可動接触子を押圧する手
段およびラッチを設けており、前述の可動接触子を押圧
する手段は、オーステナイト系ステンレス鋼線からなる
コイルばねであり、少なくとも全重量を基にして、Ｃ≦
０．１５％、Ｓｉ≦１．０％、Ｍｎ≦２．０％、Ｎｉ＝
６．０〜８．０％、およびＣｒ＝１６．０〜１８．０％
を含有し、さらに前述のオーステナイト系ステンレス鋼
線は、６０〜８０％の加工率で冷間伸線加工することに
よって得られる。In order to solve the above-mentioned problems, a circuit breaker according to the present invention comprises a detecting means for detecting an abnormal current generated in a circuit, and a circuit breaker interlocked with the detecting means. A link mechanism for shutting off the movable contact, and a movable contact, wherein the link mechanism includes a means for pressing the movable contact and a latch, and the means for pressing the movable contact is an austenitic stainless steel. A coil spring made of a steel wire, and based on at least the total weight, C ≦
0.15%, Si ≦ 1.0%, Mn ≦ 2.0%, Ni =
6.0-8.0%, and Cr = 16.0-18.0%
The austenitic stainless steel wire described above is obtained by cold drawing at a working ratio of 60 to 80%.
【００１０】また、前述のコイルばねは、Ｎｉ被覆され
た表面を持つことが好ましい。It is preferable that the above-mentioned coil spring has a Ni-coated surface.
【００１１】さらに、前述のコイルばねは、３００℃〜
５００℃の加熱温度にて低温熱処理が施されたコイルば
ねであることが好ましい。Further, the above-mentioned coil spring has a temperature of 300.degree.
It is preferable that the coil spring is subjected to a low-temperature heat treatment at a heating temperature of 500 ° C.
【００１２】以下に本発明について、より詳細に記載す
る。Hereinafter, the present invention will be described in more detail.
【００１３】[0013]
【発明の実施の形態】本発明に基づく回路遮断器は、例
えば漏電遮断器を表す図１および図２に示す構造を有す
る。図示した漏電遮断器は、上述したようにケース１、
カバー２、電源側端子３、先端に固定接点４ａを備えた
固定接触子４、先端に可動接点５ａを設けた可動接触子
５、可動リード線６、負荷側端子７、ハンドル８、回路
に発生した漏電電流および過電流のような異常電流を検
知する検知手段の一例であるバイメタル９、バイメタル
９による異常電流の検知で作動するトリップ装置１０、
ならびに該バイメタルおよびトリップ装置に連動して回
路を機械的に遮断するリンク機構１１を備えている。こ
のリンク機構１１は、ラッチ１１ａを有しており、この
ラッチ１１ａは、可動接触子５と、該可動接触子５を押
圧する手段１１ｂにより保持されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A circuit breaker according to the present invention has a structure shown in FIGS. 1 and 2 representing, for example, an earth leakage breaker. The illustrated earth leakage circuit breaker has a case 1 as described above,
Cover 2, power supply side terminal 3, fixed contact 4 provided with fixed contact 4a at the tip, movable contact 5 provided with movable contact 5a at the tip, movable lead wire 6, load side terminal 7, handle 8, generated in circuit A bimetal 9, which is an example of a detecting means for detecting an abnormal current such as a leak current and an overcurrent, a trip device 10 which operates by detecting an abnormal current by the bimetal 9,
And a link mechanism 11 for mechanically interrupting the circuit in conjunction with the bimetal and the trip device. The link mechanism 11 has a latch 11a. The latch 11a is held by the movable contact 5 and means 11b for pressing the movable contact 5.
【００１４】この回路遮断器において、回路を入切する
ための可動接触子を押圧する手段は、コイルばねが用い
られている。本発明では、このコイルばねはオーステナ
イト系ステンレス鋼を用いており、少なくとも全重量を
基にしてＣ≦０．１５％、好ましくは０．０８〜０．１
５％、Ｓｉ≦１．０％、Ｍｎ≦２．０％、Ｎｉ＝６．０
〜８．０％、Ｃｒ＝１６．０〜１８．０％を含有してい
る。この組成をとることにより、冷間加工によって加工
誘起マルテンサイト変態しやすく加工硬化に優れたオー
ステナイト系ステンレス鋼が得られる。さらに、該オー
ステナイト系ステンレス鋼は６０〜８０％の加工率に制
御して冷間伸線加工することによって得られる。In this circuit breaker, a coil spring is used as means for pressing the movable contact for switching the circuit on and off. In the present invention, this coil spring uses austenitic stainless steel, and at least C ≦ 0.15%, preferably 0.08 to 0.1 based on the total weight.
5%, Si ≦ 1.0%, Mn ≦ 2.0%, Ni = 6.0
-8.0%, Cr = 16.0-18.0%. By adopting this composition, an austenitic stainless steel excellent in work hardening that is easily transformed into martensite by cold working is obtained. Further, the austenitic stainless steel can be obtained by cold drawing at a working ratio of 60 to 80%.
【００１５】さらに、この冷間伸線加工によって得られ
た本発明のコイルばねは、３００℃〜５００℃の加熱温
度にて低温熱処理をすることが好ましい。Further, the coil spring of the present invention obtained by the cold drawing is preferably subjected to a low-temperature heat treatment at a heating temperature of 300 ° C. to 500 ° C.
【００１６】上述したような本発明のコイルばねは、回
路遮断器を高電流用として用いる場合でも、十分な押圧
を固定接触子および可動接触子に与えることができ、各
部品の温度上昇を抑えることができる。The above-described coil spring of the present invention can apply sufficient pressure to the fixed contact and the movable contact even when the circuit breaker is used for high current, and suppresses the temperature rise of each component. be able to.
【００１７】又、従来のＳＵＳ３０４線材をコイルばね
に用いた場合には極度に大きな加工（例えば９５％以
上）を施さなければ得られなかった強度が、本発明に用
いられる組成の材料をコイルばねに用いることで比較的
小さな加工率（６０〜８０％）で得られる。例えば、従
来の６０％の加工率で得られたＳＵＳ３０４線材の引っ
張り強さは１７００Ｎ／ｍｍ2程度であるのに対し、本
発明に基づく材料を用いて６０％の冷間伸線加工によっ
て得られた線材の引っ張り強さは２１００Ｎ／ｍｍ2程
度であり、従来に比べ大幅に向上した優れた引っ張り強
さを与える。また、小さな加工率で得られる本発明のコ
イルばねは、材料の組織的安定を損なうこともないの
で、結果としてばねの繰り返し疲労特性の向上につなが
る。さらに他の機械的特性（耐力、縦・横弾性係数、捻
回値、硬度）も優れていることが確認された。Further, when a conventional SUS304 wire is used for a coil spring, the strength which could not be obtained unless extremely large processing (for example, 95% or more) was performed was changed to a material having a composition used in the present invention. In this case, a relatively small processing rate (60 to 80%) can be obtained. For example, the tensile strength of a SUS304 wire obtained at a conventional processing rate of 60% is about 1700 N / mm 2 , while the tensile strength of a SUS304 wire obtained by a 60% cold drawing using the material according to the present invention is obtained. The obtained wire has a tensile strength of about 2100 N / mm 2 , which gives a significantly improved superior tensile strength as compared with the conventional wire. In addition, the coil spring of the present invention, which can be obtained with a small working ratio, does not impair the structural stability of the material, and as a result, improves the repetitive fatigue characteristics of the spring. It was also confirmed that other mechanical properties (proof stress, modulus of longitudinal and transverse elasticity, twist value, hardness) were excellent.
【００１８】このように本発明では、比較的軽度の伸線
加工でも所定の機械的特性と疲労特性を備えることがで
きる前述の組成の材料を選択するとともに、組織的安定
さを損なわない加工率範囲として６０〜８０％に設定す
るものである。As described above, according to the present invention, a material having the above-mentioned composition capable of providing predetermined mechanical properties and fatigue properties even in relatively light wire drawing is selected, and a processing rate which does not impair the structural stability is obtained. The range is set to 60 to 80%.
【００１９】すなわち、加工率６０％未満のものでは、
例え低温熱処理によって特性の向上を図るとしても、回
路遮断器のように瞬時にかつ確実に開閉動作させる為に
必要なばね弾性（少なくとも引張強さ２０００Ｎ／ｍｍ
2）を発揮させにくい。一方、加工率８０％を越える大
きな伸線加工を行った線材は、材料の組織的安定性が図
りにくく、この線材を例えばフック部を持つような苛酷
なばね形状にした場合には、繰り返し疲労回数を減じて
寿命を短くするなどの問題がある。That is, if the processing rate is less than 60%,
Even if the characteristics are improved by low-temperature heat treatment, the spring elasticity (at least a tensile strength of 2000 N / mm) necessary for instantaneously and surely opening and closing like a circuit breaker.
2 ) It is difficult to demonstrate. On the other hand, a wire rod that has been subjected to a large drawing process exceeding a processing rate of 80% is difficult to achieve structural stability of the material. There are problems such as shortening the life by reducing the number of times.
【００２０】以上のことにより本発明に基づく回路遮断
器はＪＩＳ（Ｃ８３７１）などの規格に定められた製品
特性を満足する。しかも、この材料の耐食性について
も、ＮｉやＣｒを含むオーステナイト系ステンレス鋼で
あることから、一般的な使用環境に十分に耐え得るもの
である。また、一般的な使用環境以上に苛酷な雰囲気、
例えば高温度環境や特殊ガス環境を考慮した場合は、事
前にオーステナイト系ステンレス鋼線表面にＮｉ被覆を
施しておくことが好ましい。該処理を行うことによっ
て、耐食性とともにばね成形でのコイリング性を高める
ことも可能となる。As described above, the circuit breaker according to the present invention satisfies the product characteristics defined in the standards such as JIS (C8371). In addition, the corrosion resistance of this material is also austenitic stainless steel containing Ni and Cr, so that it can sufficiently withstand a general use environment. In addition, more severe atmosphere than general use environment,
For example, when a high temperature environment or a special gas environment is taken into consideration, it is preferable to apply Ni coating on the surface of the austenitic stainless steel wire in advance. By performing the treatment, it becomes possible to enhance the coilability in the spring molding as well as the corrosion resistance.
【００２１】[0021]
【実施例】［実施例１］全重量を基にしてＣを０．１
％、Ｓｉを０．４５％、Ｍｎを０．８５％、Ｎｉを７．
２９％、Ｃｒを１７．０９％含むオーステナイト系ステ
ンレス鋼を伸線加工により、加工率６８％で線径０．９
ｍｍのばね用線材に仕上げた。EXAMPLES Example 1 C was 0.1 based on total weight
%, 0.45% of Si, 0.85% of Mn, and 7.
An austenitic stainless steel containing 29% and 17.09% Cr is drawn at a processing rate of 68% with a wire diameter of 0.9.
mm spring wire.
【００２２】このようにして得られた線材の特性を調べ
るために、以下のような実験を行った。In order to examine the characteristics of the thus obtained wire, the following experiment was conducted.
【００２３】引張り強度を調べるために、得られた線材
をチャック間距離が１００ｍｍとなるように引張試験機
に取り付け、引張速度１．０ｍｍ／分にて引張試験を行
った。In order to check the tensile strength, the obtained wire was attached to a tensile tester so that the distance between the chucks was 100 mm, and a tensile test was performed at a tensile speed of 1.0 mm / min.
【００２４】この線材を、ばね成形機により、コイル平
均径５ｍｍ、巻き数１４回、自由長２２ｍｍであり、両
端に形状Ｕのフックを有する引張コイルばねに仕上げ、
それを３００℃〜５００℃の加熱温度にて低温熱処理を
施して引張コイルばねを完成させた。This wire rod is finished by a spring forming machine into a tension coil spring having an average coil diameter of 5 mm, 14 turns, a free length of 22 mm, and a hook having a shape U at both ends.
It was subjected to a low-temperature heat treatment at a heating temperature of 300 ° C. to 500 ° C. to complete a tension coil spring.
【００２５】次に、耐食性を調べるために得られた引張
コイルばねをばね方向に引っ張った状態で、塩水噴霧、
亜硫酸ガス、および硫化水素の各雰囲気に３００時間に
わたって暴露した。次いで、この引張コイルばねの状態
を観察した。Next, with the tension coil spring obtained for examining corrosion resistance pulled in the spring direction,
Exposure to sulfuric acid gas and hydrogen sulfide atmosphere was performed for 300 hours. Next, the state of the tension coil spring was observed.
【００２６】ここでの評価は、 ○：外観上錆の発生が認められず、フック部に微小クラ
ックなどの発生が認められないもの □：僅かながら変色が認められるが発錆の無いもの △：目視により、明らかな発錆、変色が認められるもの ×：著しい赤錆などの発錆が認められるもの である。The evaluations were as follows: ：: No rust was observed on the appearance, and no fine cracks were observed on the hooks. □: Discoloration was slightly observed but no rust was observed. Δ: Those with obvious rusting and discoloration visually observed ×: Those with remarkable rusting such as red rust.
【００２７】次に、繰り返し疲労に対する強度を調べる
ため、得られた引張コイルばねをある振幅で繰り返し作
動させ、フック部が折損する回数を求めた。得られた結
果を表１に示す。Next, in order to examine the strength against repeated fatigue, the obtained tension coil spring was repeatedly operated at a certain amplitude, and the number of times the hook portion was broken was obtained. Table 1 shows the obtained results.
【００２８】さらに、荷重特性のばらつきを調べるため
に、得られた引張コイルばねの１００個に対し、７ｍｍ
引っ張ったときの荷重を調べ、その標準偏差を計算し
た。Further, in order to examine the variation of the load characteristics, 7 mm
The load at the time of pulling was examined, and its standard deviation was calculated.
【００２９】これらの得られた結果を表１に示す。The results obtained are shown in Table 1.
【００３０】[0030]
【表１】 [Table 1]
【００３１】［実施例２］線材の加工率を６８％ではな
く、８０％にした以外は実施例１と同様にして引張コイ
ルばねを完成させた。Example 2 A tension coil spring was completed in the same manner as in Example 1 except that the working ratio of the wire was changed from 80% to 68%.
【００３２】得られた線材および引張コイルばねの特性
を実施例１と同様にして調べた。結果を表１に示す。The characteristics of the obtained wire rod and the extension coil spring were examined in the same manner as in Example 1. Table 1 shows the results.
【００３３】［実施例３］ばね用線材にニッケルコーテ
ィングを施したことを除いて、実施例１と同様にして引
張コイルばねを完成させた。Example 3 A tension coil spring was completed in the same manner as in Example 1 except that the spring wire was coated with nickel.
【００３４】得られた線材及び引張コイルばねの特性を
実施例１と同様にして調べたところ、実施例１よりコイ
リングばらつきが小さくでき、耐食性も向上した。また
その他特性についても、ほぼ実施例１と同等の結果が得
られた。When the characteristics of the obtained wire rod and the tension coil spring were examined in the same manner as in Example 1, the variation in coiling was smaller than in Example 1, and the corrosion resistance was improved. As for other characteristics, almost the same results as in Example 1 were obtained.
【００３５】［実施例４］ばね用線材にニッケルコーテ
ィングを施したことを除いて、実施例２と同様にして引
張コイルばねを完成させた。Example 4 A tension coil spring was completed in the same manner as in Example 2 except that the spring wire was coated with nickel.
【００３６】得られた線材及び引張コイルばねの特性を
実施例１と同様にして調べたところ、実施例２よりコイ
リングばらつきが小さくでき、耐食性も向上した。また
その他特性についても、ほぼ実施例２と同等の結果が得
られた。When the characteristics of the obtained wire and the extension coil spring were examined in the same manner as in Example 1, the variation in coiling was smaller than that in Example 2, and the corrosion resistance was improved. As for other characteristics, almost the same results as in Example 2 were obtained.
【００３７】［比較実施例１］線材としてＳＵＳ３０４
線材（加工率８０％）を用いることを除いて、実施例１
と同様にして引張コイルばねを製造した。Comparative Example 1 SUS304 as a wire
Example 1 except that a wire rod (a processing rate of 80%) was used.
A tension coil spring was manufactured in the same manner as described above.
【００３８】得られた引張ばねを用いて実施例１と同様
にしてその特性を調べた。結果を表１に示す。The characteristics were examined in the same manner as in Example 1 using the obtained tension spring. Table 1 shows the results.
【００３９】［比較実施例２］線材としてＳＵＳ３０４
線材（加工率９０％）を用いることを除いて、実施例１
と同様にして引張コイルばねを製造した。Comparative Example 2 SUS304 as a wire
Example 1 except that a wire rod (a processing rate of 90%) was used.
A tension coil spring was manufactured in the same manner as described above.
【００４０】得られた引張ばねを用いて実施例１と同様
にしてその特性を調べた。結果を表１に示す。The characteristics were examined in the same manner as in Example 1 using the obtained tension spring. Table 1 shows the results.
【００４１】［比較実施例３］線材としてピアノ線材
（加工率７０％）を用いることを除いて、実施例１と同
様にして引張コイルばねを製造した。Comparative Example 3 A tension coil spring was manufactured in the same manner as in Example 1 except that a piano wire (processing rate 70%) was used as the wire.
【００４２】得られた引張コイルばねを用いて実施例１
と同様にしてばね特性を調べた。結果を表１に示す。Example 1 using the obtained tension coil spring
The spring characteristics were examined in the same manner as described above. Table 1 shows the results.
【００４３】［比較実施例４］実施例１と同様組成の材
料により、伸線加工率を５５％で加工した線材によりコ
イルばねを製造し低温熱処理を行った。Comparative Example 4 A coil spring was manufactured from a material having the same composition as in Example 1 and a wire processed at a drawing rate of 55%, and was subjected to a low-temperature heat treatment.
【００４４】得られた線材および引張コイルのばねの特
性を実施例１と同様にして調べた。結果を表１に示す。The characteristics of the obtained wire rod and the tension coil spring were examined in the same manner as in Example 1. Table 1 shows the results.
【００４５】［比較実施例５］実施例１と同様組成の材
料により、伸線加工率を９０％で加工した線材によりコ
イルばねを製造し低温熱処理を行った。Comparative Example 5 A coil spring was manufactured from a material having the same composition as in Example 1 and a wire processed at a wire drawing rate of 90%, and was subjected to a low-temperature heat treatment.
【００４６】得られた線材および引張コイルのばねの特
性を実施例１と同様にして調べた。結果を表１に示す。The characteristics of the obtained wire rod and the spring of the tension coil were examined in the same manner as in Example 1. Table 1 shows the results.
【００４７】以上のことより、本発明に基づくコイルば
ねは、以下に示す改善点が得られることがわかる。 （１）従来のＳＵＳ３０４線材を用いたコイルばねより
高い引張り強さや優れた繰り返し疲労など、良好な機械
的特性を有しており、コイルばねのスペースを低減して
も、回路遮断器に用いる際に、十分に有用な強度が得ら
れる。 （２）コイルばねに従来のピアノ線を用いたときに、ば
ね成形後の耐食性を向上させるために行っていた表面処
理を省くことが可能である。 （３）本発明に基づくコイルばねは、適正である６０〜
８０％の低い加工率において冷間伸線加工を施すこと
で、従来の高い加工率において冷間伸線加工を施したコ
イルばねより、繰り返し疲労特性が向上し、また荷重特
性ばらつきが少なくなった。From the above, it can be seen that the coil spring according to the present invention has the following improvements. (1) It has good mechanical properties, such as higher tensile strength and superior repeated fatigue, than conventional coil springs using SUS304 wire, and is suitable for use in circuit breakers even if the space for the coil spring is reduced. In addition, a sufficiently useful strength is obtained. (2) When a conventional piano wire is used for the coil spring, it is possible to omit the surface treatment performed to improve the corrosion resistance after the spring is formed. (3) The coil spring according to the present invention has a proper
By performing cold drawing at a low working ratio of 80%, the repetitive fatigue characteristics are improved and load characteristic variations are reduced as compared with conventional coil springs subjected to cold drawing at a high working ratio. .
【００４８】なお、比較実施例４および比較実施例５で
は伸線加工率を本発明の範囲外の条件で行ったものも示
しているが、これらは比較実施例では荷重ばらつきが大
きく、引張強さや繰り返し疲労に劣るものであった。In Comparative Examples 4 and 5, wire drawing rates were also calculated under conditions outside the range of the present invention. However, in these comparative examples, load variation was large and tensile strength was large. Positive fatigue was poor.
【００４９】（４）本発明にもとづく遮断器の動作を確
認する為、実施例１（加工率６８％）と比較実施例４
（加工率５５％）のばねを各々遮断器に組み込み開閉作
動試験を行った。その結果、比較実施例４のばねを用い
た遮断器では正確な開閉が得られなかったのに対し、実
施例１のばねを用いた遮断器では、ばらつきが少なく、
安定的で確実な開閉を行うことができた。(4) In order to confirm the operation of the circuit breaker based on the present invention, Example 1 (working rate 68%) and Comparative Example 4 were used.
Each of the springs (working rate: 55%) was incorporated into a circuit breaker, and an opening / closing operation test was performed. As a result, the circuit breaker using the spring of Comparative Example 4 could not achieve accurate opening / closing, whereas the circuit breaker using the spring of Example 1 had little variation,
Stable and reliable opening and closing could be performed.
【００５０】[0050]
【発明の効果】よって、本発明の回路遮断器に用いられ
るコイルばねは、従来のＳＵＳ３０４線材およびピアノ
線よりなるコイルばねなどより、回路遮断器に利用した
場合に前記の通り格段の作用効果を有するものといえ
る。As described above, the coil spring used in the circuit breaker of the present invention, as compared with the conventional coil spring made of SUS304 wire and piano wire, has a remarkable operational effect as described above when used in a circuit breaker. It can be said that it has.
【００５１】本発明に基づく高い強度のコイルばねを有
する回路遮断器は、高電流用として用いる場合でも、小
型で十分な押圧を得られ、各部品の温度上昇を抑えるこ
とができる。また、ばねとしての繰り返し疲労特性の改
良によりＪＩＳ規格を満足できる。The circuit breaker having a coil spring having a high strength according to the present invention can obtain a small and sufficient pressure even when used for a high current, and can suppress the temperature rise of each part. Further, the JIS standard can be satisfied by improving the repetitive fatigue characteristics of the spring.
【図１】本発明の回路遮断器のＯＮ状態を表す図であ
る。FIG. 1 is a diagram illustrating an ON state of a circuit breaker according to the present invention.
【図２】本発明の回路遮断器のＯＦＦ状態を表す図であ
る。FIG. 2 is a diagram showing an OFF state of the circuit breaker of the present invention.
１ ケース ２ カバー ３ 電源側端子 ４ 固定接触子 ４ａ 固定接点 ５ 可動接触子 ５ａ 可動接点 ６ 可動リード線 ７ 負荷側端子 ８ ハンドル ９ バイメタル １０ トリップ装置 １１ リンク機構 １１ａ ラッチ １１ｂ コイルばね DESCRIPTION OF SYMBOLS 1 Case 2 Cover 3 Power supply side terminal 4 Fixed contact 4a Fixed contact 5 Movable contact 5a Movable contact 6 Movable lead wire 7 Load side terminal 8 Handle 9 Bimetal 10 Trip device 11 Link mechanism 11a Latch 11b Coil spring
───────────────────────────────────────────────────── フロントページの続き (72)発明者 齋藤 重正 神奈川県川崎市川崎区田辺新田１番１号 富士電機株式会社内 (72)発明者 小笠原 誠 神奈川県川崎市川崎区田辺新田１番１号 富士電機株式会社内 (72)発明者 渡辺 克己 神奈川県川崎市川崎区田辺新田１番１号 富士電機株式会社内 (72)発明者 谷本 好則 大阪府枚方市池之宮４丁目17番１号 日本 精線株式会社枚方工場内 (72)発明者 渡邊 一弘 大阪府枚方市池之宮４丁目17番１号 日本 精線株式会社枚方工場内 Ｆターム(参考） 5G030 FB25 XX00 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Shigemasa Saito 1-1-1, Tanabe-Nitta, Kawasaki-ku, Kawasaki-shi, Kanagawa Prefecture Inside Fuji Electric Co., Ltd. (72) Inventor Makoto Ogasawara 1, Tanabe-Nitta, Kawasaki-ku, Kawasaki-ku, Kanagawa Prefecture No. 1 Fuji Electric Co., Ltd. (72) Katsumi Watanabe 1-1, Tanabe Nitta, Kawasaki-ku, Kawasaki City, Kanagawa Prefecture Fuji Electric Co., Ltd. (72) Yoshinori Tanimoto 4--17 Ikenomiya, Hirakata City, Osaka Prefecture No. 1 Japan Seisen Co., Ltd. Hirakata Factory (72) Inventor Kazuhiro Watanabe 4-17-1, Ikenomiya, Hirakata City, Osaka Prefecture Japan Seisen Co., Ltd. Hirakata Factory F-term (reference) 5G030 FB25 XX00
Claims (3)
知手段と、該検知手段に連動して回路を機械的に遮断す
るリンク機構と、可動接触子とを備え、前記リンク機構
が前記可動接触子を押圧する手段およびラッチを設けて
いる回路遮断器であって、 前記可動接触子を押圧する手段は、オーステナイト系ス
テンレス鋼線からなるコイルばねであり、少なくとも全
重量を基にして、Ｃ≦０．１５％、Ｓｉ≦１．０％、Ｍ
ｎ≦２．０％、Ｎｉ＝６．０〜８．０％、およびＣｒ＝
１６．０〜１８．０％を含有し、 さらに前記オーステナイト系ステンレス鋼線は、６０〜
８０％の加工率で冷間伸線加工することによって得られ
たことを特徴とする回路遮断器。A detecting means for detecting an abnormal current generated in the circuit, a link mechanism for mechanically interrupting the circuit in conjunction with the detecting means, and a movable contact; A circuit breaker provided with a means for pressing a contact and a latch, wherein the means for pressing the movable contact is a coil spring made of an austenitic stainless steel wire, and based on at least the total weight, C ≦ 0.15%, Si ≦ 1.0%, M
n ≦ 2.0%, Ni = 6.0-8.0%, and Cr =
16.0 to 18.0%, and the austenitic stainless steel wire is 60 to 18.0%.
A circuit breaker obtained by cold drawing at a processing rate of 80%.
を持つことを特徴とする請求項１に記載の回路遮断器。2. The circuit breaker according to claim 1, wherein the coil spring has a Ni-coated surface.
の加熱温度にて低温熱処理が施されたコイルばねである
ことを特徴とする請求項１または請求項２に記載の回路
遮断器。3. The coil spring according to claim 1, wherein the temperature of the coil spring is between 300.degree.
3. The circuit breaker according to claim 1, wherein the circuit breaker is a coil spring that has been subjected to a low-temperature heat treatment at a heating temperature of 3.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29601199A JP2001118482A (en) | 1999-10-18 | 1999-10-18 | Circuit breaker |
| TW089121877A TW533444B (en) | 1999-10-18 | 2000-10-17 | Circuit breaker |
| KR10-2000-0060886A KR100417147B1 (en) | 1999-10-18 | 2000-10-17 | Circuit breaker |
| CNB001314300A CN1144247C (en) | 1999-10-18 | 2000-10-18 | Circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29601199A JP2001118482A (en) | 1999-10-18 | 1999-10-18 | Circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001118482A true JP2001118482A (en) | 2001-04-27 |
Family
ID=17827974
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29601199A Pending JP2001118482A (en) | 1999-10-18 | 1999-10-18 | Circuit breaker |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP2001118482A (en) |
| KR (1) | KR100417147B1 (en) |
| CN (1) | CN1144247C (en) |
| TW (1) | TW533444B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7494100B2 (en) | 2003-12-01 | 2009-02-24 | Sony Corporation | Electronic equipment tilting and rotating apparatus |
| CN108962699A (en) * | 2017-05-23 | 2018-12-07 | 上海辰竹仪表有限公司 | Tripping mechanism, pedestal and surge protector for surge protector |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100427052B1 (en) * | 2002-02-20 | 2004-04-13 | 상도전기통신 주식회사 | Circuit breaker using positive temperature coefficent thermister |
-
1999
- 1999-10-18 JP JP29601199A patent/JP2001118482A/en active Pending
-
2000
- 2000-10-17 KR KR10-2000-0060886A patent/KR100417147B1/en not_active IP Right Cessation
- 2000-10-17 TW TW089121877A patent/TW533444B/en not_active IP Right Cessation
- 2000-10-18 CN CNB001314300A patent/CN1144247C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7494100B2 (en) | 2003-12-01 | 2009-02-24 | Sony Corporation | Electronic equipment tilting and rotating apparatus |
| CN108962699A (en) * | 2017-05-23 | 2018-12-07 | 上海辰竹仪表有限公司 | Tripping mechanism, pedestal and surge protector for surge protector |
| CN108962699B (en) * | 2017-05-23 | 2024-02-02 | 上海辰竹仪表有限公司 | Tripping mechanism for surge protector, base and surge protector |
Also Published As
| Publication number | Publication date |
|---|---|
| KR100417147B1 (en) | 2004-02-05 |
| CN1144247C (en) | 2004-03-31 |
| CN1293440A (en) | 2001-05-02 |
| TW533444B (en) | 2003-05-21 |
| KR20010040103A (en) | 2001-05-15 |
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