JP2006302634A - Electromagnetic tripping device of circuit breaker - Google Patents

Electromagnetic tripping device of circuit breaker Download PDF

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JP2006302634A
JP2006302634A JP2005121895A JP2005121895A JP2006302634A JP 2006302634 A JP2006302634 A JP 2006302634A JP 2005121895 A JP2005121895 A JP 2005121895A JP 2005121895 A JP2005121895 A JP 2005121895A JP 2006302634 A JP2006302634 A JP 2006302634A
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bobbin
yoke
iron core
cylinder
trip device
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Seishiro Ozaki
正志朗 尾崎
Hideo Hayashi
英雄 林
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Fuji Electric FA Components and Systems Co Ltd
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Fuji Electric FA Components and Systems Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic tripping device that is so improved as to be incorporated in a breaker case without looseness by improving assembly workability and absorbing dispersion of component dimensions. <P>SOLUTION: This electromagnetic tripping device is formed into an assembly comprising an L-shaped yoke 9, an iron core 10 composed by being combined with a leg part of the yoke by inserting a cylinder 10a thereinto, and a solenoid coil 11 and assembled by locking and fixing the leg part of the yoke and a collar-like flange 10a-1 formed at a tip of the cylinder of the iron core to positioning bases 1a-1d formed in a mold case of the breaker. A bobbin of the solenoid coil is divided into two components such as a winding frame 11c integrating a tube part inserted into the outer periphery of the cylinder of the iron core with a lower collar and an upper collar 11d with a cushion base 11d-1 inserted into the tube part of the winding frame, thereafter the solenoid coil is assembled by sequentially inserting a winding previously formed into a coil-like shape and the upper collar into the tube part of the winding frame, and it is combined with the iron core and the yoke and attached to the breaker case. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、低圧機器の過電流保護に用いるサーキットプロテクタなどを対象とした回路遮断器の電磁引外し装置に関する。   The present invention relates to an electromagnetic trip device for a circuit breaker intended for a circuit protector used for overcurrent protection of a low voltage device.

頭記のサーキットプロテクタは、配線用遮断器と同様な過電流保護を目的としたコンポーネントで可動接触子の開閉機構に連繋させた電磁引外し装置を備え、過電流を検出して作動する電磁引外し装置により開閉機構をトリップさせて電流を遮断するものである。
一方、上記のサーキットプロテクタを対象とした回路遮断器の電磁引外し装置について、電磁引外し装置を回路遮断器のモールドケース（樹脂成形品）に組み込む際の組立作業性の簡便化を図るために、左右二分割構造になるモールドケースの内部に電磁引外し装置を構成する継鉄，鉄心，電磁コイルなどの各部品に対応する位置決め座を形成しておき、回路遮断器の組立工程で前記の各部品を個別に位置決め座に係止固定して電磁引外し装置を所定位置に組み立てるようにした構成のものが本発明と同一出願人より先に提案されて公知である（特許文献１参照）。 The circuit protector mentioned above is equipped with an electromagnetic trip device connected to the open / close mechanism of the movable contact with the same component as the circuit breaker for the purpose of overcurrent protection. The opening / closing mechanism is tripped by the removing device to cut off the current.
On the other hand, in order to simplify the assembly workability when the electromagnetic trip device is incorporated in the mold case (resin molded product) of the circuit breaker for the circuit breaker electromagnetic trip device for the circuit protector described above. A positioning seat corresponding to each component such as a yoke, an iron core, and an electromagnetic coil constituting the electromagnetic trip device is formed inside the mold case having a left and right split structure, and the above-described circuit breaker assembly process A configuration in which each component is individually locked and fixed to a positioning seat and the electromagnetic trip device is assembled at a predetermined position has been proposed by the same applicant as the present invention (see Patent Document 1). .

次に、前記サーキットプロテクタの全体構成、およびそのケース内部に組み込んだ電磁引外し装置の従来における組立構造を図６〜図９に示す。まず、図６において、１は二分割構造になるモールドケース、２，３はモールドケース１の両端に配した主回路端子、４は固定接触子、５は可動接触子、６は開閉機構、６ａは開閉機構の開閉ばね６ｂを蓄勢状態に鎖錠するラッチ、７は開閉操作ハンドル、８は電磁引外し装置であり、該電磁引外し装置８は主回路端子２と固定接極子４との間に介装接続されている。
ここで、電磁引外し装置は、図７で示すようにＬ字形の継鉄９と、継鉄９の脚部に穿孔した穴に嵌挿して組合せたプランジャ内蔵形の鉄心１０と、鉄心１０の外周に配した電磁コイル１１と、継鉄９の上端に枢支して鉄心１０の接極子に対峙させたアーマチュア１２と、アーマチュア１２の復帰ばね１３との組立体からなり、後記するように継鉄９の脚部，鉄心１０の上端をそれぞれモールドケース１の内部に形成した位置決め座１ａ〜１ｄに係止固定して電磁引外し装置８を所定位置に組み立て、この組立位置でアーマチュア１２の操作片１２ａを開閉機構６のラッチ６ａに連繋させるようにしている。なお、電磁引外し装置８の動作については特許文献１に詳しく述べられており、ここではその説明は省略する。 Next, the entire structure of the circuit protector and the conventional assembly structure of the electromagnetic trip device incorporated in the case are shown in FIGS. First, in FIG. 6, 1 is a mold case having a two-divided structure, 2 and 3 are main circuit terminals arranged at both ends of the mold case 1, 4 is a stationary contact, 5 is a movable contact, 6 is an opening / closing mechanism, 6a Is a latch for locking the open / close spring 6b of the open / close mechanism in a stored state, 7 is an opening / closing operation handle, 8 is an electromagnetic trip device, and the electromagnetic trip device 8 is connected to the main circuit terminal 2 and the fixed armature 4 There is an intervening connection between them.
Here, as shown in FIG. 7, the electromagnetic trip device includes an L-shaped yoke 9, a plunger built-in iron core 10 that is combined by being inserted into a hole drilled in a leg portion of the yoke 9, and an iron core 10. It consists of an assembly of an electromagnetic coil 11 arranged on the outer periphery, an armature 12 pivotally supported on the upper end of the yoke 9 and opposed to the armature of the iron core 10, and a return spring 13 of the armature 12, as will be described later. The leg portion of the iron 9 and the upper end of the iron core 10 are locked and fixed to the positioning seats 1a to 1d formed inside the mold case 1, respectively, and the electromagnetic trip device 8 is assembled at a predetermined position, and the armature 12 is operated at this assembly position. The piece 12 a is connected to the latch 6 a of the opening / closing mechanism 6. The operation of the electromagnetic trip device 8 is described in detail in Patent Document 1, and the description thereof is omitted here.

前記の鉄心１０は上端に鍔状のフランジ１０ａ−１を形成した非磁性のシリンダ１０ａにプランジャ（磁性体）１０ｂを収容し、かつシリンダの上端開口部に接極子１０ｃを嵌着してプランジャ１０ｂとの間に復帰ばね１０ｄを介装し、さらにシリンダ内にシリコーン油を封入したダッシュポット構造になる。
一方、電磁コイル１１は、図８で詳記するようにボビン１１ａに巻線１１ｂを巻装してその周面を絶縁シート１１ｃで覆い、巻線１１ｂの端末（巻始め，巻終わり端）１１ｂ−１，１１ｂ−２をボビン１１ａから下方に引き出した構造になる。また、ボビン１１ａは、図９（ａ），（ｂ）で表すように、円筒状の巻枠１１ａ−１の両端に下鍔１１ａ−２，上鍔１１ａ−３，および上端側に円筒状の突起１１ａ−４を一体に成形した樹脂モールド品になる。 The iron core 10 accommodates a plunger (magnetic body) 10b in a non-magnetic cylinder 10a having a flange-like flange 10a-1 formed at the upper end, and an armature 10c is fitted into the upper end opening of the cylinder so that the plunger 10b A dashpot structure is provided in which a return spring 10d is interposed between the cylinder and silicone oil sealed in a cylinder.
On the other hand, as will be described in detail with reference to FIG. 8, the electromagnetic coil 11 is wound around a bobbin 11a with a winding 11b and the peripheral surface thereof is covered with an insulating sheet 11c, and ends (winding start and winding end) 11b of the winding 11b. -1, 11b-2 is drawn down from the bobbin 11a. Further, as shown in FIGS. 9A and 9B, the bobbin 11a has a lower collar 11a-2, an upper collar 11a-3 at both ends of the cylindrical winding frame 11a-1, and a cylindrical shape at the upper end side. A resin mold product in which the protrusions 11a-4 are integrally formed is obtained.

そして、図６に示した回路遮断器のモールドケース１に部品を組み込んで電磁引外し装置８を構築する組立工程では、あらかじめ継鉄９にアーマチュア１２，復帰ばね１３を取付けた上で、図で示すように継鉄９の脚部両端をモールドケース１の内部に形成した位置決め座１ａ，１ｂに跨がって係止固定する。次に、電磁コイル１１を嵌挿した鉄心１０を継鉄９の脚部に穿孔した穴に上方から嵌入した上で、鉄心１０のシリンダ上端から張り出す鍔状のフランジ１０ａ−１をコ字形の位置決め座１ｃ，１ｄに圧入してこの位置に係止固定する。これより、継鉄９，鉄心１０がモールドケース内の所定位置に位置決め固定され、また電磁コイル１１は継鉄９の脚部と鉄心１０のシリンダ上端に形成したフランジ１０ａ−１との間に挟まれて定位置に保持される。
特許第３４７５５９８号公報 Then, in the assembly process of constructing the electromagnetic trip device 8 by incorporating parts into the mold case 1 of the circuit breaker shown in FIG. 6, the armature 12 and the return spring 13 are attached to the yoke 9 in advance. As shown, both leg portions of the yoke 9 are locked and fixed across the positioning seats 1 a and 1 b formed inside the mold case 1. Next, the iron core 10 into which the electromagnetic coil 11 is inserted is inserted into a hole drilled in the leg portion of the yoke 9 from above, and a flange-like flange 10a-1 protruding from the upper end of the cylinder of the iron core 10 is formed into a U-shape. It press-fits into the positioning seats 1c and 1d and is locked and fixed at this position. As a result, the yoke 9 and the iron core 10 are positioned and fixed at predetermined positions in the mold case, and the electromagnetic coil 11 is sandwiched between the leg portion of the yoke 9 and the flange 10a-1 formed at the upper end of the cylinder of the iron core 10. And held in place.
Japanese Patent No. 3475598

ところで、前記の電磁引外し装置について、従来の組立構造では組立性，および組立精度の面で次記のような問題点がある。すなわち、
（１）電磁コイル１１の巻線１１ｂは樹脂成形品のボビン１１ａに素線を直接巻き付けて巻回するようにしている。一方、巻線１１ａは回路遮断器の定格遮断容量によって素線の太さが異なる。このために細い素線を巻き付ける場合には特に問題ないが、細い素線に比べて曲げ剛性が大きな太い素線では巻き付けに大きな力を要することから、ボビン１１ａに歪みが生じてボビンの上鍔，下鍔が変形してしまい、鉄心１０に電磁コイル１１を嵌挿する組立に支障を来すことがある。また、ボビン１１ａから引き出した巻線１１ｂの端末の成形についても、太い素線では曲げ加工が手作業では簡単に行えない問題もある。
（２）また、電磁引外し装置９を構成する各部品の寸法にバラツキがあると、図７に示した電磁引外し装置の組立状態では、モールドケース側の位置決め座１ａ〜１ｄに係止された継鉄９と鉄心１０との間に挟まれて鉄心１０に嵌挿した電磁コイル１１との間にガタの生じることがあり、このために電磁コイル１１と鉄心１０のプランジャ１０ｂとの相対位置が変わって引外し装置の動作特性に影響を及ぼすおそれがある。このために、従来構造では個々の部品寸法精度を高めて部品のバラツキを小さく抑える必要があるが、寸法精度の高い部品はコスト高となる。また、鉄心１０はシリンダ１０ａの上端側に鍔状フランジ１０ａ−１を有していることから、モールドケースへの組込み方向も規制される。 By the way, with respect to the electromagnetic trip device, the conventional assembly structure has the following problems in terms of assemblability and assembly accuracy. That is,
(1) The winding 11b of the electromagnetic coil 11 is wound by winding a wire directly around a bobbin 11a of a resin molded product. On the other hand, the wire 11a has a different wire thickness depending on the rated breaking capacity of the circuit breaker. For this reason, there is no particular problem when winding a thin wire, but a thick wire having a larger bending rigidity than a thin wire requires a large force for winding. , The lower arm may be deformed, which may hinder assembly in which the electromagnetic coil 11 is inserted into the iron core 10. In addition, the end of the winding 11b drawn from the bobbin 11a also has a problem that it cannot be easily bent by a manual work with a thick strand.
(2) Also, if there are variations in the dimensions of the parts constituting the electromagnetic trip device 9, the electromagnetic trip device shown in FIG. 7 is locked to the positioning seats 1a to 1d on the mold case side in the assembled state. May occur between the electromagnetic coil 11 sandwiched between the yoke 9 and the iron core 10 and inserted into the iron core 10, and for this reason, the relative position between the electromagnetic coil 11 and the plunger 10 b of the iron core 10. May change and affect the operating characteristics of the tripping device. For this reason, in the conventional structure, it is necessary to increase the dimensional accuracy of each part and suppress the variation of the parts, but the cost of a part with high dimensional accuracy is high. Moreover, since the iron core 10 has the flange-shaped flange 10a-1 on the upper end side of the cylinder 10a, the assembling direction into the mold case is also restricted.

本発明は上記の点に鑑みなされたものであり、その目的は電磁コイルの構造を改良してその組立作業性を改善し、併せて部品の寸法バラツキを補償してガタ無しに遮断器ケースに組み込めるようにした電磁引外し装置を提供することにある。   The present invention has been made in view of the above points, and its object is to improve the assembly workability by improving the structure of the electromagnetic coil, and also to compensate for the dimensional variation of the parts and to make the circuit breaker case without backlash. An object of the present invention is to provide an electromagnetic trip device that can be incorporated.

上記目的を達成するために、本発明によれば、Ｌ字形の継鉄と、プランジャおよび復帰ばねをシリンダに収容してその先端に接極子を備え、かつシリンダの一端側を前記継鉄の脚部に嵌挿して組合せた鉄心と、ボビンに巻線を巻装して前記鉄心のシリンダ外周に嵌合した電磁コイルと、継鉄に枢支して鉄心の接極子に対峙させたアーマチュアと、アーマチュアの復帰ばねとの組立体になり、継鉄の脚部および鉄心のシリンダ先端に形成した鍔状フランジをそれぞれ前記モールドケースの内部に形成した位置決め座に係止して組み立てた電磁引外し装置において、
前記電磁コイルのボビンを、鉄心のシリンダ外周に嵌挿する筒部と下鍔とが一体になる巻枠と、該巻枠の筒部に嵌挿する上鍔との部品に分割した上で、前記巻枠の筒部にあらかじめ素線をコイル状に成形した巻線，および上鍔を順に嵌挿して電磁コイルを組立てるものとする（請求項１）。 In order to achieve the above object, according to the present invention, an L-shaped yoke, a plunger and a return spring are accommodated in a cylinder, an armature is provided at the tip thereof, and one end of the cylinder is attached to a leg of the yoke. An iron core that is inserted into and combined with the part, an electromagnetic coil that is wound around a bobbin and fitted around the outer circumference of the cylinder of the iron core, an armature that pivotally supports the yoke and faces the armature of the iron core, An electromagnetic trip device which is an assembly with a return spring of an armature and is assembled by locking a flange-shaped flange formed on the leg of the yoke and the tip of the cylinder of the iron core to a positioning seat formed inside the mold case. In
After dividing the bobbin of the electromagnetic coil into parts of a winding frame in which a cylindrical portion and a lower collar fitted into the cylinder outer periphery of the iron core are integrated, and an upper collar fitted into the cylindrical portion of the winding frame, An electromagnetic coil is assembled by sequentially inserting a winding formed by coiling an element wire into a cylindrical portion of the winding frame and an upper collar in order (Claim 1).

また、遮断器ケースに電磁引外し装置を組み込んだ状態で、電磁コイルと鉄心との間にガタが生じるのを防ぐ手段として、前記電磁コイルのボビン上鍔にその上面から突き出してボビンの巻枠円筒部に嵌入するハブ部を設けた上で、該ハブ部の先端に軸方向の荷重を受けて撓み変形が可能なガタ防止用のクッション座を形成する（請求項２）。
さらに、前記ボビンの上鍔には、その周縁から下方に延在して継鉄の板面に添わせるＬ字状のガイド部を形成する（請求項３）。 In addition, as a means for preventing backlash between the electromagnetic coil and the iron core with the electromagnetic trip device incorporated in the circuit breaker case, the bobbin reel protrudes from the upper surface of the bobbin of the electromagnetic coil. After providing a hub portion to be fitted into the cylindrical portion, a cushion seat for preventing backlash that can be bent and deformed by receiving an axial load is formed at the tip of the hub portion.
Further, an L-shaped guide portion extending downward from the periphery of the bobbin and attaching to the plate surface of the yoke is formed on the upper collar of the bobbin (Claim 3).

上記の構成によれば、次記の効果を奏する。
（１）電磁コイルのボビンを巻枠と上鍔の二部品に分割することにより、別工程で素線をコイル状に成形した巻線を巻枠に嵌挿して電磁コイルを組立てることができ、これにより太い素線で電磁コイルを構成する場合でも、素線をボビンに直接巻き付けて巻線を巻回する従来構造のようにボビンを変形させるおそれもなく、鉄心への組み付け作業性が改善される。
（２）また、電磁コイルのボビン上鍔にクッション座を形成しておくことにより、電磁引外し装置を構成する個々の部品に寸法のバラツキがあっても、遮断器ケースに組み込む際に、前記クッション座が部品間バラツキを吸収してガタ無しに電磁引外し装置を所定の位置に組立てることができ、これにより要求される部品の寸法精度を緩和して製作コストの低減化が図れる。
（３）さらに、前記ボビンの上鍔に、その周縁から下方に延在して継鉄の板面に添わせるＬ字状のガイド部を形成しておくことにより、組立工程ではＬ字状ガイド部を基準にしてボビンの組込み方向を決めることができて組立作業性が向上する。 According to said structure, there exists the following effect.
(1) By dividing the bobbin of the electromagnetic coil into two parts, a winding frame and an upper arm, it is possible to assemble the electromagnetic coil by inserting a winding formed by forming a wire into a coil shape in a separate process into the winding frame, As a result, even when an electromagnetic coil is composed of thick wires, there is no risk of deforming the bobbin as in the conventional structure in which the wire is wound directly around the bobbin and the workability of assembling to the iron core is improved. The
(2) In addition, by forming a cushion seat on the bobbin top of the electromagnetic coil, even when there are variations in the dimensions of individual parts constituting the electromagnetic trip device, The cushion seat absorbs the variation between the components, and the electromagnetic trip device can be assembled at a predetermined position without backlash. This reduces the required dimensional accuracy of the components and reduces the manufacturing cost.
(3) Further, an L-shaped guide is formed on the upper collar of the bobbin so as to extend downward from the periphery of the bobbin and attach to the yoke plate surface. Assembling workability can be improved because the assembling direction of the bobbin can be determined on the basis of the part.

以下、本発明の実施の形態を図１〜図５に示す実施例に基づいて説明する。なお、実施例の図中で図６，図７に対応する部材には同じ符号を付してその説明は省略する。
図示実施例において、従来構造と異なる点は電磁コイル１１の組立構造にあり、その他の部品および遮断器モールドケースへの組み付け構造は従来と同様である。すなわち、実施例の構成では、電磁コイル１１のボビン（樹脂成形品）１１ａが、鉄心１０のシリンダ１０ａに嵌挿する円筒部１１ｃ−１と下鍔11c−２とが一体になる巻枠１１ｃ（図４（ａ），（ｂ）参照）と、巻枠１１ｃの円筒部に嵌挿する上鍔１１ｄ（図５（ａ）〜（ｃ）参照）との二部品に分割されている。
また、上鍔１１ｄにはその上面中央にばね性のあるクッション座１１ｄ−１が形成、さらに上鍔周縁には下方に延在して継鉄９の板面に添わせるようＬ字状に屈曲したガイド部１１ｄ−２が形成されており、組立の際にＬ字状ガイド部１１ｄ−２を継鉄９の板面に合わせることで組込み方向を判断できて作業性が向上する。また、クッション座１１ｄ−１は図５で示すように上鍔１１ｄの上面に突き出して一体に形成したハブ部１１ｄ−１１の端面の周縁二箇所にアーチ状の凸部を形成し、かつ凸部の内側に沿ってハブの胴部に台形状の穴１１ｄ−１２を切欠き形成しており、図５（ｃ）で表すように先端に軸方向の押圧荷重ｆが加わると、クッション座１１ｄ−１が実線から鎖線位置に撓み変形する。なお、図中の符号ｈはクッション座１１ｄ−１の撓み代を表している。 Hereinafter, embodiments of the present invention will be described based on the examples shown in FIGS. In the drawings of the embodiment, members corresponding to those in FIGS. 6 and 7 are denoted by the same reference numerals and description thereof is omitted.
In the illustrated embodiment, the difference from the conventional structure is the assembly structure of the electromagnetic coil 11, and the other parts and the assembly structure to the circuit breaker mold case are the same as the conventional structure. That is, in the configuration of the embodiment, the bobbin (resin molded product) 11a of the electromagnetic coil 11 has a winding frame 11c (in which a cylindrical portion 11c-1 and a lower collar 11c-2 are integrally inserted into the cylinder 10a of the iron core 10. 4 (a) and 4 (b)) and an upper collar 11d (see FIGS. 5 (a) to 5 (c)) to be inserted into the cylindrical portion of the reel 11c.
Further, the upper collar 11d is formed with a spring cushion seat 11d-1 at the center of the upper surface, and the upper collar is extended in the L shape so as to extend downward and follow the plate surface of the yoke 9. The guide portion 11d-2 is formed, and the assembling direction can be determined by matching the L-shaped guide portion 11d-2 with the plate surface of the yoke 9 during assembly, so that workability is improved. Further, as shown in FIG. 5, the cushion seat 11d-1 protrudes from the upper surface of the upper collar 11d to form arch-shaped convex portions at two peripheral edges of the end surface of the hub portion 11d-11, and the convex portion A trapezoidal hole 11d-12 is formed in the body portion of the hub along the inner side, and when an axial pressing load f is applied to the tip as shown in FIG. 5C, the cushion seat 11d- 1 bends and deforms from the solid line to the chain line position. In addition, the code | symbol h in a figure represents the bending allowance of the cushion seat 11d-1.

一方、電磁コイル１１として太い素線からなる巻線１１ｂは、ボビン１１の巻枠１１ｃに直接巻き付けず、図３（ａ），（ｂ）で示すようにコイル素線を別工程でコイル状に巻回成形し、さらにその巻き始め，巻き終わり端から引き出した端末１１ｂ−１，１１ｂ−２を図示のように曲げ加工して絶縁皮膜も剥がしておく。
次に、回路遮断器のモールドケースに電磁引外し装置の前記組立体を組み込む工程での組立手順を説明する。まず、電磁コイル１１の構成部品であるボビン１１ａの巻枠１１ｃ（図４参照）に図３で述べた成形済みの巻線１１ｂ，および図５に示した上鍔１１ｄを順に嵌挿して電磁コイル１１を仮組立てする。次いで、仮組立の電磁コイル１１を鉄心１０のシリンダ１０ａへ下方から嵌挿した上で（図２参照）、鉄心１０のシリンダ１０ａを継鉄９の脚部に穿孔した嵌入穴へ上方から嵌入した後に、継鉄９の上端にアーマチュア１２を枢着し、さらに復帰ばね１３を取付ける。なお、この組立状態では上鍔１１ｄの周縁に垂下形成したガイド部１１ｄ−２が巻枠に嵌挿した巻線１１ｂを外側から抑え込むとともに、継鉄９の板面に重なって上鍔１１ｄを所定の向きに保持する。 On the other hand, the winding 11b made of a thick strand as the electromagnetic coil 11 is not directly wound around the winding frame 11c of the bobbin 11, and the coil strand is coiled in a separate process as shown in FIGS. 3 (a) and 3 (b). The terminals 11b-1 and 11b-2 drawn out from the winding start and winding end are bent as shown in the figure, and the insulating film is peeled off.
Next, an assembling procedure in the step of incorporating the assembly of the electromagnetic trip device into the mold case of the circuit breaker will be described. First, the formed winding 11b described in FIG. 3 and the upper collar 11d shown in FIG. 5 are sequentially inserted into the winding frame 11c (see FIG. 4) of the bobbin 11a, which is a component of the electromagnetic coil 11, and the electromagnetic coil is inserted. 11 is temporarily assembled. Next, the temporarily assembled electromagnetic coil 11 was fitted into the cylinder 10a of the iron core 10 from below (see FIG. 2), and the cylinder 10a of the iron core 10 was fitted into the fitting hole formed in the leg portion of the yoke 9 from above. Later, the armature 12 is pivotally attached to the upper end of the yoke 9, and the return spring 13 is attached. In this assembled state, the guide portion 11d-2 formed to hang around the periphery of the upper collar 11d suppresses the winding 11b fitted into the winding frame from the outside, and overlaps the plate surface of the yoke 9 so that the upper collar 11d is predetermined. Hold in the direction.

次に、前記組立体を遮断器のモールドケース１（図６参照）に形成した位置決め座１ａ〜１ｄに係止して電磁引外し装置８を所定の位置に固定する。すなわち、鉄心１０のシリンダ上端に形成したフランジ１０a-1を位置決め座１ｃ，１ｄの間に跨がって係止し、次いで継鉄９の脚部を上方に押し込みながら位置決め座１ａと１ｂに係止固定する。この組立状態では、鉄心１０に嵌挿された電磁コイル１１が継鉄９の脚部と鉄心１０のシリンダ上端との間に挟持保持され、そのボビン１１ａの上鍔１１ｄに形成したクッション座１１ｄ−１が撓み変形して（図５（ｃ）参照）各部品の寸法バラツキを吸収する。これにより、電磁引外し装置８をその部品相互間のガタ無しにモールドケース１に安定よく組み込むことができるようになる。   Next, the assembly is locked to positioning seats 1a to 1d formed on the mold case 1 (see FIG. 6) of the circuit breaker, and the electromagnetic trip device 8 is fixed at a predetermined position. That is, the flange 10a-1 formed on the upper end of the cylinder of the iron core 10 is locked over the positioning seats 1c and 1d, and then the leg portions of the yoke 9 are pushed upward to engage the positioning seats 1a and 1b. Secure it. In this assembled state, the electromagnetic coil 11 fitted into the iron core 10 is held between the leg portion of the yoke 9 and the cylinder upper end of the iron core 10, and the cushion seat 11d- formed on the upper collar 11d of the bobbin 11a. 1 is bent and deformed (see FIG. 5C) to absorb the dimensional variation of each part. As a result, the electromagnetic trip device 8 can be stably incorporated into the mold case 1 without any backlash between the components.

本発明の実施例による電磁引外し装置の組立構造図Assembly structure diagram of electromagnetic trip device according to an embodiment of the present invention 図１における鉄心と電磁コイルとの仮組立状態を表す部分断面側視図1 is a partial cross-sectional side view showing a temporary assembly state of the iron core and the electromagnetic coil in FIG. 図２における電磁コイルの構造図で、（ａ），（ｂ）はそれぞれ側面図および底面図FIG. 3 is a structural diagram of the electromagnetic coil in FIG. 2, (a) and (b) are a side view and a bottom view, respectively. 図２における電磁コイルのボビン巻枠の構造図で、（ａ），（ｂ）はそれぞれ側面図および底面図FIG. 3 is a structural diagram of the bobbin winding frame of the electromagnetic coil in FIG. 2, wherein (a) and (b) are a side view and a bottom view, respectively. 図２における電磁コイルのボビン上鍔の構造図で、（ａ）〜（ｃ）はそれぞれ平面図，側視断面図，および側面図FIG. 3 is a structural diagram of the upper bobbin of the electromagnetic coil in FIG. 2, (a) to (c) are a plan view, a side sectional view, and a side view, respectively. 本発明の実施対象となる回路遮断器全体の構成断面図Cross-sectional view of the entire circuit breaker that is the subject of the present invention 従来における電磁引外し装置の構造を示す断面側視図Sectional side view showing the structure of a conventional electromagnetic trip device 図７における鉄心と電磁コイルとの組立体の一部断面側視図FIG. 7 is a partial cross-sectional side view of the iron core and electromagnetic coil assembly in FIG. 図８における電磁コイルのボビン構造図で、（ａ），（ｂ）はそれぞれ平面図および縦断側面図FIG. 9 is a structural view of the bobbin of the electromagnetic coil in FIG.

符号の説明Explanation of symbols

１ 回路遮断器のモールドケース
１ａ〜１ｄ 位置決め座
６ 開閉機構
８ 電磁引外し装置
９ 継鉄
１０ 鉄心
１０ａ シリンダ
１０ａ−１ フランジ
１０ｂ プランジャ
１０ｃ 接極子
１０ｄ 復帰ばね
１１ 電磁コイル
１１ａ ボビン
１１ｂ 巻線
１１ｃ ボビンの巻枠
１１ｃ−１ 円筒部
１１ｃ−２ 下鍔
１１ｄ 上鍔
１１ｄ−１ クッション座
１１ｄ−２ 屈曲ガイド
１２ アーマチュア
１３ 復帰ばね 1 Circuit breaker mold case 1a to 1d Positioning seat 6 Opening / closing mechanism 8 Electromagnetic trip device 9 Relay 10 Iron core 10a Cylinder 10a-1 Flange 10b Plunger 10c Armature 10d Return spring 11 Electromagnetic coil 11a Bobbin 11b Winding 11c Bobbin Winding frame 11c-1 Cylindrical portion 11c-2 Lower collar 11d Upper collar 11d-1 Cushion seat 11d-2 Bending guide 12 Armature 13 Return spring

Claims (3)

回路遮断器のモールドケースに組み込んで可動接触子の開閉機構に連繋させた電磁引外し装置であって、該装置がＬ字形の継鉄と、プランジャおよび復帰ばねをシリンダに収容してその先端に接極子を備え、かつシリンダの一端側を前記継鉄の脚部に嵌挿して組合せた鉄心と、ボビンに巻線を巻装して前記鉄心のシリンダ外周に嵌合した電磁コイルと、継鉄に枢支して鉄心の接極子に対峙させたアーマチュアと、アーマチュアの復帰ばねとの組立体になり、継鉄の脚部および鉄心のシリンダ先端に形成した鍔状フランジをそれぞれ前記モールドケースの内部に形成した位置決め座に係止して組み立てたものにおいて、
前記電磁コイルのボビンを、鉄心のシリンダ外周に嵌挿する筒部と下鍔とが一体になる巻枠と、該巻枠の筒部に嵌挿する上鍔との部品に分割した上で、前記巻枠の筒部にあらかじめ素線をコイル状に成形した巻線，および上鍔を順に嵌挿して電磁コイルを組立て構成したことを特徴とする回路遮断器の電磁引外し装置。 An electromagnetic trip device incorporated in a molded case of a circuit breaker and linked to an open / close mechanism of a movable contact, the device accommodating an L-shaped yoke, a plunger and a return spring in a cylinder and at the tip thereof An iron core having an armature and having one end of the cylinder fitted and inserted into the leg of the yoke; an electromagnetic coil wound around a bobbin and fitted around the cylinder of the iron core; and a yoke The armature pivotally supported by the armature and opposed to the armature armature, and the return spring of the armature, and the flanges formed at the leg of the yoke and the tip of the cylinder of the iron core are respectively inside the mold case. In what is assembled and locked to the positioning seat formed in
After dividing the bobbin of the electromagnetic coil into parts of a winding frame in which a cylindrical portion and a lower collar fitted into the cylinder outer periphery of the iron core are integrated, and an upper collar fitted into the cylindrical portion of the winding frame, An electromagnetic trip device for a circuit breaker, wherein an electromagnetic coil is assembled by inserting a winding formed in advance in a coil shape into a cylindrical portion of the winding frame, and an upper coil in order. 請求項１記載の電磁引外し装置において、ボビンの上鍔に、その上面から突き出してボビンの巻枠円筒部に嵌入するハブ部を設けた上で、該ハブ部の先端に撓み変形が可能なガタ防止用のクッション座を形成したことを特徴とする回路遮断器の電磁引外し装置。 2. The electromagnetic trip device according to claim 1, wherein a hub portion protruding from an upper surface of the bobbin and fitted into a bobbin cylindrical portion of the bobbin is provided on the upper end of the bobbin, and the distal end of the hub portion can be bent and deformed. An electromagnetic trip device for a circuit breaker, wherein a cushion seat for preventing backlash is formed. 請求項１または２に記載の電磁引外し装置において、ボビンの上鍔に、その周縁から下方に延在して継鉄の板面に添わせるＬ字状のガイド部を形成したことを特徴とする回路遮断器の電磁引外し装置。 3. The electromagnetic trip device according to claim 1, wherein an L-shaped guide portion that extends downward from a peripheral edge of the bobbin and attaches to a plate surface of the yoke is formed on the upper surface of the bobbin. Circuit breaker electromagnetic trip device.
JP2005121895A 2005-04-20 2005-04-20 Electromagnetic tripping device of circuit breaker Withdrawn JP2006302634A (en)

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Publication number Priority date Publication date Assignee Title
JP2011222414A (en) * 2010-04-13 2011-11-04 Nippon Telegr & Teleph Corp <Ntt> Cutoff device
WO2015004697A1 (en) * 2013-07-11 2015-01-15 三菱電機株式会社 Circuit breaker

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JPS57123344U (en) * 1981-01-26 1982-07-31
JPS58124908U (en) * 1982-02-16 1983-08-25 東光株式会社 Bobbin for transformer
JPS6399740U (en) * 1986-12-18 1988-06-28
JPH0541051U (en) * 1991-10-31 1993-06-01 松下電工株式会社 Overcurrent detection device for circuit breaker
JPH0773796A (en) * 1993-05-28 1995-03-17 Circuit Breaker Ind Ltd Installation of coil in bobbin and circuit breaker bobbin aggregate
JPH08298065A (en) * 1995-02-28 1996-11-12 Fuji Electric Co Ltd Electromagnetic trip device of circuit breaker

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JPS57123344U (en) * 1981-01-26 1982-07-31
JPS58124908U (en) * 1982-02-16 1983-08-25 東光株式会社 Bobbin for transformer
JPS6399740U (en) * 1986-12-18 1988-06-28
JPH0541051U (en) * 1991-10-31 1993-06-01 松下電工株式会社 Overcurrent detection device for circuit breaker
JPH0773796A (en) * 1993-05-28 1995-03-17 Circuit Breaker Ind Ltd Installation of coil in bobbin and circuit breaker bobbin aggregate
JPH08298065A (en) * 1995-02-28 1996-11-12 Fuji Electric Co Ltd Electromagnetic trip device of circuit breaker

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011222414A (en) * 2010-04-13 2011-11-04 Nippon Telegr & Teleph Corp <Ntt> Cutoff device
WO2015004697A1 (en) * 2013-07-11 2015-01-15 三菱電機株式会社 Circuit breaker
CN105378887A (en) * 2013-07-11 2016-03-02 三菱电机株式会社 Circuit breaker

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