JP5790908B2 - Circuit breaker instantaneous trip device - Google Patents

Circuit breaker instantaneous trip device Download PDF

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JP5790908B2
JP5790908B2 JP2009015834A JP2009015834A JP5790908B2 JP 5790908 B2 JP5790908 B2 JP 5790908B2 JP 2009015834 A JP2009015834 A JP 2009015834A JP 2009015834 A JP2009015834 A JP 2009015834A JP 5790908 B2 JP5790908 B2 JP 5790908B2
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circuit breaker
piece
gap
mover
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JP2010176905A (en
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馬場 隆
隆 馬場
健造 毎熊
健造 毎熊
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Tempearl Industrial Co Ltd
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この発明は,配線用遮断器や漏電遮断器などの回路遮断器の瞬時引外し装置に関するものである。特に,瞬時引外し装置が開閉機構部に作用して引外し動作を行わせる場合の,該瞬時引外し装置の作用のし具合を,当初の設計値に近づけるよう調整可能な瞬時引外し装置に関するものである。 The present invention relates to an instantaneous trip device for a circuit breaker such as a circuit breaker or a leakage breaker. In particular, the present invention relates to an instantaneous trip device that can be adjusted so that the action state of the instantaneous trip device is close to the original design value when the instantaneous trip device acts on the opening / closing mechanism to perform the trip operation. Is.

回路遮断器の瞬時引外し装置は,回路遮断器に短絡などの異常電流が流れた場合に,電流による電磁誘導を利用して瞬時動作を行い,接点装置を開極するよう開閉機構部に作用するものである。 The circuit breaker instantaneous trip device operates on the switching mechanism to open the contact device by performing instantaneous operation using electromagnetic induction due to current when an abnormal current such as a short circuit flows in the circuit breaker. To do.

一般的に,瞬時引外し装置は固定子と可動子とで構成され,可動子は,電磁誘導により固定子に吸引される可動鉄片と,他の部材に当接作用する作用片を備えた作用部材とから構成される。なお,可動鉄片と作用片とは1つの部品で構成される場合と,別々の部品を固着することで構成される場合とがある。 Generally, an instantaneous trip device is composed of a stator and a mover, and the mover has a movable iron piece attracted to the stator by electromagnetic induction and an action piece that abuts against other members. It consists of members. The movable iron piece and the action piece may be constituted by one part or may be constituted by fixing separate parts.

固定子と可動鉄片には,鉄など磁性体の材料を用いる。固定子と可動鉄片の配置は,回路遮断器の主回路に流れる電流の周りに発生する磁界により電磁石となって引き付け合うような位置関係となるよう配置する。 Magnetic materials such as iron are used for the stator and movable iron pieces. The stator and the movable iron piece are arranged so that they are attracted to each other as an electromagnet by the magnetic field generated around the current flowing in the main circuit of the circuit breaker.

具体的には,固定子は筐体に固着され,可動子は固定子に対し軸支回転や並進移動など適宜吸引動作されるよう配置される。固定子と可動鉄片の間には予め間隙を設けてあり,回路遮断器が設置された電路に異常のない状態では前記間隙が保持されるよう,ばねなどの付勢部材により,前記間隙を保持している。 Specifically, the stator is fixed to the housing, and the mover is arranged so as to be appropriately sucked by a shaft support rotation or a translational movement with respect to the stator. A gap is provided in advance between the stator and the movable iron piece, and the gap is held by a biasing member such as a spring so that the gap is held when there is no abnormality in the electric circuit where the circuit breaker is installed. doing.

回路遮断器が設置された電路に短絡などの異常電流が流れた場合,可動子は,付勢部材による付勢力に抗して固定子に吸引され,作用片が開閉機構部の作動板に作用する。作動板には,開閉機構部を所定の状態(オン状態,オフ状態)に保持せしめるよう開閉機構部と係合するラッチ部を形成する係合片が固着されている。このラッチ部における係合が,可動子の作動板への作用により作動板の変移とともに係合片が軸支回転や並進移動などして外れた場合には,開閉機構部が接点装置を開極させ,回路遮断器は短絡などの異常電流を遮断することができる。 When an abnormal current such as a short circuit flows in the circuit where the circuit breaker is installed, the mover is attracted to the stator against the urging force of the urging member, and the action piece acts on the operating plate of the switching mechanism. To do. An engagement piece that forms a latch portion that engages with the opening / closing mechanism portion is fixed to the operation plate so as to hold the opening / closing mechanism portion in a predetermined state (on state, off state). When the engagement in the latch part is disengaged due to the movement of the moving plate due to the action of the mover and the engagement piece is disengaged by pivoting or translational movement, the switching mechanism opens the contact device. The circuit breaker can cut off abnormal current such as short circuit.

さて,前記係合片の係合が外れるためには,前述した係合片が一定量以上の軸支回転や並進移動などをする必要がある。即ち,係合片が固着されている作動板が一定量以上の軸支回転や,並進移動などをする必要があり,前記可動子は作動板に対して作用するにあたり,一定量以上の作用をする必要がある。そして,可動子の作動板への必要な作用量は,前記固定子と可動鉄片の間隙の大きさ,作動板と可動子の位置関係,係合量の長さなどで決定される。 Now, in order to disengage the engagement piece, it is necessary for the engagement piece described above to perform a pivotal rotation or translational movement of a certain amount or more. In other words, the operating plate to which the engagement piece is fixed needs to be pivoted or translated by a certain amount or more. When the movable element acts on the working plate, the working plate has a certain amount of action or more. There is a need to. The required amount of action of the mover on the working plate is determined by the size of the gap between the stator and the movable iron piece, the positional relationship between the working plate and the mover, the length of the engagement amount, and the like.

このような瞬時引外し装置においては,一般的に固定子が可動子をひきつける吸引力は,間隙の自乗に反比例する関係であり,回路遮断器における引外し電流を選定するにあたっては,間隙の大きさが個々の製品に応じてばらつきにくくなるよう設計が行われている。 In such an instantaneous trip device, the attracting force with which the stator attracts the mover is generally inversely proportional to the square of the gap. The design is designed to make it difficult to vary depending on individual products.

しかしながら,間隙の大きさに関与する部品は,一般的に,固定子,可動鉄片,可動鉄片の軸支部の3部品程度と少ないため,間隙の大きさを決定する寸法のばらつきの積上げも少なくできる。したがって,間隙の大きさのばらつきを小さくすることは比較的容易である。 However, since there are generally few parts involved in the size of the gap, such as the stator, the movable iron piece, and the pivotal support of the movable iron piece, the accumulation of dimensional variations that determine the size of the gap can be reduced. . Therefore, it is relatively easy to reduce the gap size variation.

また,前述した係合の大きさについては,瞬時引き外し性能だけでなく,長限時引き外し性能,漏電引き外し性能などの引き外し性能や,回路遮断器が振動や衝撃などに耐えて閉路状態を保持する性能に大きく影響するため,やはり,ばらつきにくくなるよう設計しなければならない。そして,係合の大きさに関与する部品は,一般的に,作動板,係合片,それらを軸支する軸受部材(主軸受)の3部品程度と少ないため,係合の長さを決定する寸法のばらつきの積上げも少なくできる。したがって,係合の長さのばらつきを小さくすることは比較的容易である。 In addition, the magnitude of the engagement described above is not limited to instantaneous tripping performance, but also tripping performance such as long-time tripping performance, earth leakage tripping performance, and circuit breakers withstand vibrations and shocks in a closed state. Since it greatly affects the performance of maintaining the value, it must be designed so that it is less likely to vary. The number of parts involved in the magnitude of engagement is generally as few as three parts: the operating plate, the engagement piece, and the bearing member (main bearing) that supports them, so the length of engagement is determined. It is also possible to reduce the accumulation of dimensional variations. Therefore, it is relatively easy to reduce the variation in engagement length.

また,作動板と可動子の位置関係は,瞬時引き外し性能に大きく影響するため,ばらつきにくいよう設計することが望ましいが,作動板と可動子の位置関係に関与する部品は,それらが別個に,回路遮断器の筐体に配設されることから,前述の部品の寸法のばらつきの積み上げが,5〜9部品程度の多くの部品の積み上げになり,作動板と可動子の位置関係のばらつきを小さくすることが容易ではない。そして,これらの位置関係のばらつきにより作動板と可動子の間隔が大きくなり過ぎると,可動子の作動板への作用のし具合が不十分で,係合が外れずに,最悪の場合,開閉機構部が駆動できないために接点装置が開極されず,瞬時引き外し性能を満足できない場合が予想されるため,設計値の公差範囲から外れているような場合には,製造工程において関係する部品の交換や,部品そのものに対して曲げ加工を行い,作動板と可動子の位置関係を設計値に近づけるよう修正する必要があった。 In addition, the positional relationship between the actuating plate and the mover greatly affects the instantaneous tripping performance, so it is desirable to design it so that it does not vary. Since the circuit breaker casing is arranged, the above-described variation in the size of the components results in the accumulation of many components, such as 5 to 9, and the positional relationship between the operating plate and the mover varies. It is not easy to make small. If the distance between the actuating plate and the mover becomes too large due to variations in these positional relationships, the action of the mover on the actuating plate is not sufficient, and the disengagement is not released. It is expected that the contact device will not be opened due to the inability to drive the mechanism, and the instantaneous tripping performance cannot be satisfied. It was necessary to correct the position of the actuator plate and the mover closer to the design values by exchanging the parts and bending the parts themselves.

そして,部品の交換などにより作動板と可動子の位置関係を修正する場合は,交換後の部品の組み合わせにより位置関係が適切か否か確実性に乏しい上,交換,確認に要する工数が多くなり製造コストが高くなる。 When correcting the positional relationship between the operating plate and the mover by exchanging parts, it is not certain whether the positional relationship is appropriate depending on the combination of parts after replacement, and the man-hours required for replacement and confirmation increase. Manufacturing cost increases.

また,部品そのものに対して曲げ加工を行い,作動板と可動子の位置関係を修正する場合,可動子側を曲げ加工する方法が確実性は高い。これは,一般的に作動板は樹脂などの絶縁材料で形成されることが多く,弾性を有するため,一旦曲げ加工を行っても復元する可能性があるからである。 In addition, when bending the part itself and correcting the positional relationship between the operating plate and the mover, the method of bending the mover side is highly reliable. This is because the operating plate is generally formed of an insulating material such as a resin and has elasticity, so that it may be restored even if it is once bent.

このため,実際には可動子を曲げ加工することになる。この場合,可動子が筐体に取り付けられたまま,可動子そのものを作動板方向に曲げ加工するため,曲げ加工には比較的大きな力が必要になる。また,回路遮断器または可動子の意図しない部分が変形などしないよう配慮する必要がある。 For this reason, the mover is actually bent. In this case, since the mover itself is bent toward the working plate while the mover is attached to the housing, a relatively large force is required for the bending process. In addition, it is necessary to take care not to deform the unintended part of the circuit breaker or mover.

したがって,瞬時引外し装置を回路遮断器へ取り付けた状態で可動子を曲げ加工する場合には,専用の曲げ加工治具を用意して,不用意な変形を回避する必要があるが,一般的に可動子の周辺には空間が少ないため,この狭い空間で回路遮断器または可動子の意図しない部分が変形などしないような曲げ加工治具を製作することは困難であることが多い。 Therefore, when bending the mover with the instantaneous trip device attached to the circuit breaker, it is necessary to prepare a dedicated bending jig to avoid inadvertent deformation. In addition, since there is little space around the mover, it is often difficult to manufacture a bending jig that does not deform an unintended portion of the circuit breaker or the mover in this narrow space.

また,瞬時引外し装置を回路遮断器から取り外した状態で曲げ加工を行うことは比較的容易であるが,瞬時引外し装置の取り外しと取り付けの工数が余分にかかり,また,取り外しと取り付け作業自体において,ねじを外して締め直すことにより取り付け位置のばらつきが生ずることがあるため,正確な調整に対する不確定性が残り,総じて製造コストが高くなる要因となる。 In addition, it is relatively easy to perform bending with the instantaneous trip device removed from the circuit breaker, but it takes additional man-hours to remove and install the instantaneous trip device, and the removal and installation work itself. In this case, when the screw is removed and retightened, the mounting position may vary. Therefore, uncertainties regarding accurate adjustment remain, and the manufacturing cost increases as a whole.

このように,作動板と可動子の位置関係を当初の設計値に近づけるよう回路遮断器へ取り付けた状態で可動子を曲げ加工する場合であっても,回路遮断器から取外した状態で曲げ加工する場合であっても,曲げ加工の際に誤って必要以上に曲げ過ぎた場合は,回路遮断器に電流が流れていない状態であっても可動子が作動板に常時作用してしまい接点装置の閉操作ができなくなってしまう場合がある。この場合,再度,可動子を曲げ戻す加工を行わなければならず,製造コストがさらに高くなる。 In this way, even when the mover is bent while attached to the circuit breaker so that the positional relationship between the actuating plate and the mover is close to the original design value, However, if the bending is excessively performed more than necessary, the mover will always act on the operating plate even when no current is flowing through the circuit breaker. May not be able to close. In this case, it is necessary to bend the mover again, and the manufacturing cost is further increased.

さて,可動子そのものに対して曲げ加工する例を挙げたが,その他の調整例として,特許文献1及び特許文献2を示した。特許文献1には,図1に示したように,動作電流を調整するダイヤル式の引外し電流調整機構の開示がなされている。ダイヤルを回すことにより,各極に渡された回動軸が回転し,回動軸に軸支されたインスタントバーを介して,アーマチュアを駆動させ,ヨークとアーマチュアとのギャップを変化させるものである。 An example of bending the mover itself has been given, but Patent Document 1 and Patent Document 2 are shown as other adjustment examples. Patent Document 1, as shown in FIG. 1 0, disclose dial-tripping current adjusting mechanism for adjusting the operating current have been made. By turning the dial, the rotation shaft passed to each pole rotates, and the armature is driven via the instant bar supported by the rotation shaft to change the gap between the yoke and the armature. .

また,特許文献2には,図1に示したように,過電流引外し装置に組み込まれたダイヤル式の時延引外し電流の調整機構の開示がなされている。ダイヤルを回すことにより,各極に渡って軸支されたクロスバーの操作片に形成された軸方向に傾斜する斜面を,軸方向に移動させることにより,バイメタルと操作片とのギャップを変化させるものである。 Further, Patent Document 2, as shown in FIG. 1 1, the disclosure of protraction off current adjusting mechanism when the dial type incorporated in the overcurrent tripping device have been made. By turning the dial, the gap between the bimetal and the operation piece is changed by moving the slope inclined in the axial direction formed on the operation piece of the crossbar that is pivotally supported across each pole in the axial direction. Is.

このように,特許文献1及び特許文献2は,いずれも,製品出荷後においても引外し電流の調整を筐体の外側から行うことができるように構成された回路遮断器である。 As described above, both Patent Document 1 and Patent Document 2 are circuit breakers configured so that the tripping current can be adjusted from the outside of the housing even after product shipment.

特開平4−212232号公報 図4Japanese Patent Laid-Open No. 4-212232 特開平9−298025号公報 図3Japanese Patent Laid-Open No. 9-298025 FIG.

このように,従来の回路遮断器の瞬時引き外し装置にあっては,以上のように,製造後において,作動板と可動子の位置関係を修正するためには,可動子そのものを作動板方向に曲げ加工するから,場合によっては不用意な力がかかり,回路遮断器または可動子の意図しない部分が変形してしまうことがあり,また,多くの工数を要し,製造コストが高くなるという問題があった。 Thus, in the case of a conventional circuit breaker instantaneous tripping device, as described above, in order to correct the positional relationship between the operating plate and the mover after manufacturing, the mover itself is moved in the direction of the operating plate. In some cases, an inadvertent force is applied in some cases, and the unintended part of the circuit breaker or mover may be deformed. In addition, many man-hours are required and the manufacturing cost increases. There was a problem.

また,特許文献1及び特許文献2においては,回路遮断器の各極に対して個別に調整を行うことができないから,特定の極だけを調整することができ,また,調整のための構造が複雑となり,コストが高くなるという課題があった。 Further, in Patent Document 1 and Patent Document 2, since adjustment cannot be made individually for each pole of the circuit breaker, only a specific pole can be adjusted, and a structure for adjustment is not provided. There was a problem that it was complicated and cost increased.

そこで本件の発明の目的とするところは,引外し電流の大きさを変えることなく,各極独立して可動子と作動板とのギャップを当初の設計値に近づけるよう調整作業を行えながらも,製造コストを低くできるとともに,専用の曲げ加工治具が不要で,回路遮断器へ取り付けた状態で曲げ加工しても回路遮断器または可動子の意図しない部分の変形などがなく,しかも,曲げの量が一定量以下にでき,誤って必要以上に調整しすぎることのない瞬時引外し装置を得ることである。 Therefore, the object of the present invention is to perform adjustment work so that the gap between the mover and the actuating plate can be brought close to the original design value independently without changing the magnitude of the tripping current. The manufacturing cost can be reduced, a dedicated bending jig is not required, there is no unintentional deformation of the circuit breaker or the mover even if it is bent while attached to the circuit breaker, The aim is to obtain an instantaneous trip device that can reduce the amount below a certain amount and does not accidentally adjust too much.

上述の目的を達成するために,本発明の請求項1では,電路に発生した過電流を検出し,瞬時引外し特性を有する瞬時引外し装置を備えた多極回路遮断器において,各極毎の瞬時引外し装置を構成する可動鉄片と連動して開閉機構を動作させるよう作用する作用部材の作用片自体を,開閉機構への作用方向に対して予め折り曲げて構成し,該開閉機構と作用片との間隙を調整する時には,折り曲げて構成した作用片自体の曲げを作用方向に沿う方向に曲げ戻すことにより,間隙を調整する間隙調整手段を設けたことを特徴として回路遮断器の瞬時引外し装置を提供したものである。 In order to achieve the above object, according to claim 1 of the present invention, in a multipolar circuit breaker having an instantaneous trip device having an instantaneous trip characteristic, an overcurrent generated in an electric circuit is detected. The action piece itself of the action member acting to operate the opening / closing mechanism in conjunction with the movable iron piece constituting the instantaneous tripping device is bent in advance with respect to the action direction to the opening / closing mechanism, and the action mechanism When adjusting the gap between the circuit breaker, it is characterized in that a gap adjusting means for adjusting the gap is provided by bending back the bending of the acting piece itself in a direction along the action direction. A removal device is provided.

これにより,瞬時引外し装置における固定子と可動鉄片との間隙は変化しないから,引外し電流の大きさは変わらず,各極独立して可動子と作動板とのギャップの調整作業を行えながらも,製造コストを低くできるとともに,専用の曲げ加工治具が不要で,回路遮断器へ取り付けた状態で曲げ加工しても回路遮断器または可動子の意図しない部分の変形などがなく,しかも,曲げの量が一定量以下にでき,誤って必要以上に調整しすぎることのない瞬時引外し装置を得ることができる。 As a result, since the gap between the stator and the movable iron piece in the instantaneous trip device does not change, the magnitude of the trip current does not change, and the gap between the mover and the operating plate can be adjusted independently for each pole. However, the manufacturing cost can be reduced, a dedicated bending jig is not required, and there is no unintentional deformation of the circuit breaker or the mover even if bending is performed while attached to the circuit breaker. The amount of bending can be reduced below a certain amount, and an instantaneous trip device can be obtained that is not accidentally adjusted too much.

調整には一般的なペンチなどの工具を用いることができ,専用の曲げ加工治具が不要で,回路遮断器へ取り付けた状態で曲げ加工しても回路遮断器または可動子の意図しない部分の変形などがなく,しかも,曲げの量が一定量以下にでき,誤って必要以上に調整しすぎることのない瞬時引外し装置を得ることができる。 For adjustment, a general tool such as pliers can be used, and a dedicated bending tool is not required. Even if it is bent while attached to the circuit breaker, an unintended part of the circuit breaker or mover It is possible to obtain an instantaneous trip device that is not deformed and that can be bent less than a certain amount and that is not erroneously adjusted excessively.

また,請求項2による瞬時引外し装置は,前記間隙調整手段における折り曲げ部分は,曲げ部を複数有して略くの字状に形成され,略くの字状の曲げ部の曲げ戻しによって延びる方向が作用方向に沿う方向に一致することを特徴として,請求項1記載の回路遮断器の瞬時引外し装置を提供したものである。
これにより,調整が必要と見込まれる調整可能量を確保する時に,作用片を一方向に折り曲げて該作用片を構成する場合と比較して,曲げ部を複数有して略くの字状に形成した場合には,該作用片が占める空間を低減させることができ,省スペース化を行いながら瞬時引外し装置を提供することができる。
Further, in the instantaneous tripping device according to claim 2, the bent portion of the gap adjusting means has a plurality of bent portions and is formed in a substantially square shape, and extends by bending back the substantially square-shaped bent portion. The instantaneous trip device for a circuit breaker according to claim 1, wherein the direction coincides with the direction along the direction of action.
As a result, when securing the adjustable amount that is expected to be adjusted, the working piece is bent in one direction, and the working piece is formed in a substantially square shape with a plurality of bent portions. When formed, the space occupied by the action piece can be reduced, and an instantaneous trip device can be provided while saving space.

引外し電流の大きさを変えることなく,各極独立して可動子と作動板とのギャップを当初の設計値に近づけるよう調整作業を行えながらも,製造コストを低くできるとともに,専用の曲げ加工治具が不要で,回路遮断器へ取り付けた状態で曲げ加工しても回路遮断器または可動子の意図しない部分の変形などがなく,しかも,曲げの量が一定量以下にでき,誤って必要以上に調整しすぎることのない瞬時引外し装置を得ることができる効果がある。 While adjusting the gap between the mover and the actuating plate independently of the original design value without changing the magnitude of the tripping current, the manufacturing cost can be reduced and a dedicated bending process can be performed. There is no need for jigs, there is no deformation of the circuit breaker or the unintended part of the circuit breaker even if it is bent while attached to the circuit breaker, and the amount of bending can be less than a certain amount. There is an effect that an instantaneous tripping device that is not excessively adjusted can be obtained.

本発明の瞬時引外し装置を適用した回路遮断器のカバーを開けた状態の斜視図。The perspective view of the state which opened the cover of the circuit breaker to which the instantaneous trip apparatus of this invention was applied. 初期の間隙の状態を示した図。The figure which showed the state of the initial stage gap. 作用片が作動板に当接した時の状態を示した図。The figure which showed the state when an action piece contact | abuts to the action | operation board. 係合部のラッチが外れた時の状態を示した図。The figure which showed the state when the latch of an engaging part removed. 実施例1の作用部材の拡大図。The enlarged view of the action member of Example 1. FIG. 作用片を最大まで曲げ戻した場合の図。The figure at the time of bending back an action piece to the maximum. 作用片の初期状態と曲げ戻した場合の比較図。The comparison figure at the time of bending back the initial state of an action piece. 実施例2の作用部材の拡大図。The enlarged view of the action member of Example 2. FIG. 作用片の初期状態と曲げ戻した場合の比較図。The comparison figure at the time of bending back the initial state of an action piece. 従来の例を示した図。The figure which showed the conventional example. 従来の例を示した図。The figure which showed the conventional example.

以下,本発明の実施の形態について図面を参照しながら説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図1は,本発明の瞬時引外し装置を回路遮断器に適用した場合の実施例を示すもので,各極毎に瞬時引外し装置を備えた多極回路遮断器100の筐体を構成するカバーを取り外した場合の斜視図である。 FIG. 1 shows an embodiment in which the instantaneous tripping device of the present invention is applied to a circuit breaker, and constitutes a housing of a multipolar circuit breaker 100 having an instantaneous tripping device for each pole. It is a perspective view at the time of removing a cover.

回路遮断器100の瞬時引外し装置110以外の部分は,一般的な瞬時引外し装置を備えた回路遮断器と同等のものである。即ち,操作ハンドル101をオン,オフ操作することによって,該操作ハンドルとリンク機構などにより接続された開閉機構部102が連動して駆動され,さらに該開閉機構部102に接続された接点装置103が連動して駆動されて,電路を開閉するものである。また,電路に過電流が発生した場合には,回路遮断器に備えられた過電流引外し装置110によって過電流を検出し,過電流の大きさによって,時延引外し,もしくは瞬時引外しを行うよう該過電流引外し装置110の作用部が開閉機構部102を引外し動作し,自動的に電路を遮断する。 The parts other than the instantaneous trip device 110 of the circuit breaker 100 are the same as those of a circuit breaker provided with a general instantaneous trip device. That is, when the operation handle 101 is turned on / off, the opening / closing mechanism 102 connected to the operation handle by a link mechanism or the like is driven in conjunction with each other, and the contact device 103 connected to the opening / closing mechanism 102 is further connected. It is driven in conjunction to open and close the electric circuit. When an overcurrent occurs in the circuit, the overcurrent trip device 110 provided in the circuit breaker detects the overcurrent, and the tripping is delayed or instantaneously tripped depending on the magnitude of the overcurrent. Thus, the action part of the overcurrent tripping device 110 operates to trip the opening / closing mechanism part 102 and automatically shuts off the electric circuit.

過電流引外し装置には,熱動電磁形と完全電磁形などがあり,本実施例では熱動電磁形の過電流引外し装置110を示している。そして,熱動電磁形の過電流引外し装置110においては,電路に過電流が発生した場合には,該過電流の大きさによって,短絡電流などの異常電流が発生した場合には,固定子となる電磁枠と,該電磁枠に吸引される可動子となる可動鉄片を筐体内の電路を囲むように設けて,短絡電流に起因する電磁誘導により駆動する電磁式の短絡電流検出部により該異常電流を検出して瞬時引外し動作を行い,短絡電流よりも小さな過電流が発生した場合には,バイメタルなどの熱動素子を用いて熱動式の検出部により過電流を検出して時延引外し動作を行うものである。 The overcurrent tripping device includes a thermal electromagnetic type and a complete electromagnetic type. In this embodiment, a thermal electromagnetic type overcurrent tripping device 110 is shown. In the thermal electromagnetic overcurrent tripping device 110, when an overcurrent is generated in the electric circuit, an abnormal current such as a short circuit current is generated depending on the magnitude of the overcurrent. And an electromagnetic short-circuit current detector that is driven by electromagnetic induction caused by a short-circuit current, and a movable iron piece that serves as a mover attracted by the electromagnetic frame is provided so as to surround the electric circuit in the housing. When an abnormal current is detected and an instantaneous trip operation is performed, and an overcurrent smaller than the short-circuit current is generated, the overcurrent is detected by a thermal detection unit using a thermal element such as a bimetal. Performs the demounting operation.

接点装置103は,一端に接点が設けられた可動接触子1031と,該可動接触子1031と対向配置されて,同じく一端に接点が設けられた固定接触子1032とを備えている。このうち,固定接触子1032は回路遮断器100のケース側に配設され,可動接触子1031は開閉機構部102に備えられるクロスバー104に装着されて,該クロスバー104が,前記操作ハンドル101の操作に連動して回動することにより,接点装置103が開閉駆動される。 The contact device 103 includes a movable contact 1031 provided with a contact at one end, and a fixed contact 1032 disposed opposite to the movable contact 1031 and similarly provided with a contact at one end. Among these, the fixed contact 1032 is disposed on the case side of the circuit breaker 100, the movable contact 1031 is mounted on the cross bar 104 provided in the opening / closing mechanism 102, and the cross bar 104 is connected to the operation handle 101. The contact device 103 is driven to open and close by rotating in conjunction with the above operation.

過電流引外し装置110の開閉機構部102への作用は,前述したように,開閉機構部に設けられた作動板に対して行われる。本実施例の場合,図2に示したように,作動板105は,開閉機構部102を構成する主軸受1021に軸支されて,一定量回動自在に保持されている。また,作動板105には,開閉機構部を所定の状態(オン状態,オフ状態)に保持せしめるよう開閉機構の一部と係合するようラッチ部が形成された係合片1051が固着されている。このラッチ部における開閉機構部側の係合が,過電流引外し装置110の作用片が作動板に作用することにより作動板が変移していき,作動板の変移とともに係合片が軸支回転や並進移動などして係合が外れた場合には,開閉機構部が接点装置103を開極させ,回路遮断器100は電路を遮断するよう動作する。 The operation of the overcurrent tripping device 110 on the opening / closing mechanism 102 is performed on the operating plate provided in the opening / closing mechanism as described above. In the case of the present embodiment, as shown in FIG. 2, the operation plate 105 is pivotally supported by a main bearing 1021 that constitutes the opening / closing mechanism portion 102, and is held rotatably by a certain amount. Further, an engagement piece 1051 formed with a latch portion to be engaged with a part of the opening / closing mechanism is fixed to the operation plate 105 so as to hold the opening / closing mechanism portion in a predetermined state (on state, off state). Yes. The engagement of the latch mechanism on the side of the opening / closing mechanism part is caused by the action piece of the overcurrent tripping device 110 acting on the action plate, and the action plate is changed. When the engagement is released due to, for example, translational movement, the switching mechanism opens the contact device 103, and the circuit breaker 100 operates to interrupt the electric circuit.

さて,過電流引外し装置110における作動板への作用は,時延引外しの場合には,熱動素子であるバイメタルに設けられた作用部により行われ,瞬時引外しの場合には,電磁式の引外し機構に備えられる可動子のうち作用部材に設けられた作用片により行われる。 Now, the action of the overcurrent tripping device 110 on the operating plate is performed by the action portion provided in the bimetal which is the thermal element in the case of the time-delayed trip, and in the case of the instantaneous trip, the electromagnetic type is applied. This is performed by the action piece provided on the action member of the mover provided in the tripping mechanism.

作用部材の拡大図を図5に示した。本実施例の場合,作用部材1111は,非磁性体で形成されており,一端には,作用片1111aが設けられている。また,可動鉄片の取付け用孔部1111bが設けられており,可動鉄片1112がカシメにより取付けられる。また,略中央部には,作用部材を,固定子である電磁枠1113に回動自在に軸支するための孔部1111cが設けられている。電磁枠1113は磁性体で形成されているから,短絡電流などの異常電流が発生した場合には,電磁誘導により,可動子が固定子に引き付けられて,作用部材が図2中反時計回りに回転し,作用片1111aが作動板105に当接作用する。 An enlarged view of the working member is shown in FIG. In the case of the present embodiment, the action member 1111 is formed of a non-magnetic material, and an action piece 1111a is provided at one end. Moreover, the mounting hole part 1111b of a movable iron piece is provided, and the movable iron piece 1112 is attached by crimping. In addition, a hole 1111c for pivotally supporting the action member on the electromagnetic frame 1113, which is a stator, is provided at a substantially central portion. Since the electromagnetic frame 1113 is formed of a magnetic material, when an abnormal current such as a short-circuit current occurs, the mover is attracted to the stator by electromagnetic induction, and the action member rotates counterclockwise in FIG. The action piece 1111a is brought into contact with the operation plate 105 by rotating.

作用部材1111における作用片1111aには,作動板105と作用片1111aとの間隙を調整するための間隙調整手段を設けている。該間隙調整手段として,作用片の一部を作用方向に対して予め折り曲げて構成し,調整時には,折り曲げ部を作用方向に沿う方向に曲げ戻すことにより,前記間隙を調整可能としている。最大まで曲げ戻した場合の状態を図6に示した。最大まで曲げ戻した場合には,作用片は作用方向にまっすぐに伸びた状態となる。設計時においては,この調整前の状態で十分に作用量が確保できるよう設計するとよい。 The action piece 1111a of the action member 1111 is provided with a gap adjusting means for adjusting the gap between the operation plate 105 and the action piece 1111a. As the gap adjusting means, a part of the action piece is bent in advance with respect to the action direction, and at the time of adjustment, the gap can be adjusted by bending back the bent portion in the direction along the action direction. The state when bent back to the maximum is shown in FIG. When bent back to the maximum, the action piece extends straight in the action direction. When designing, it is advisable to design so that a sufficient amount of action can be secured in the state before this adjustment.

このような調整にあたっては,可動子と固定子との間隙を変化させずに行うことができる。即ち,可動子と固定子との間隙は,瞬時引外し装置の駆動が電磁誘導により行われることから,瞬時引外し装置を備えた回路遮断器における所定の瞬時引外し特性と密接に関係しており,瞬時引外し電流の下限値を変化させることなく調整を行うことが可能となるものである。 Such adjustment can be performed without changing the gap between the mover and the stator. In other words, the gap between the mover and the stator is closely related to the predetermined instantaneous tripping characteristics in the circuit breaker equipped with the instantaneous tripping device because the instantaneous tripping device is driven by electromagnetic induction. Therefore, adjustment can be performed without changing the lower limit value of the instantaneous trip current.

可動子と固定子との間隙に着目すると,図2に示したように,過電流引外し装置110が動作していない初期状態の間隙G1,図3に示したように,電路に異常電流が発生した場合に過電流引外し装置110が駆動し,作動板105に作用片が当接した場合の間隙G2,及び図4に示したように,さらに過電流引外し装置が駆動し,作動板105を押圧し,開閉機構のラッチが外れた時の間隙G3,の寸法関係を,設計時の理想値に近づけながら作動板105と作用片1111aとの間隙を調整することができる。 Paying attention to the gap between the mover and the stator, as shown in FIG. 2, the initial gap G1 when the overcurrent trip device 110 is not operating, as shown in FIG. When this occurs, the overcurrent tripping device 110 is driven, and the overcurrent tripping device is further driven as shown in FIG. The gap between the actuating plate 105 and the action piece 1111a can be adjusted while the dimensional relationship of the gap G3 when the latch 105 of the opening / closing mechanism is released by pressing 105 is brought close to the ideal value at the time of design.

図5ならびに図6に示したように,作用片の作動板と当接する先端が「折り曲げ」状態から「曲げ戻し」状態に変移する量に比べて,作用部材1111が作動板105に作用する方向に変移する量は非常に小さいものとなる(図7)。 As shown in FIGS. 5 and 6, the direction in which the action member 1111 acts on the action plate 105 as compared with the amount that the tip of the action piece that contacts the action plate changes from the “bent” state to the “bend back” state. The amount of transition to is very small (FIG. 7).

実際に,作用片1111aの作動板と当接する先端が,「折り曲げ」状態から「曲げ戻し」状態に変移するまでの振れ幅,また,逆方向への振れ幅の量は,例えば8mm程度とした場合,作用部材1111が作動板105に作用する方向に変移する量,即ち,間隙の調整量は,0.5mm程度と,相対的に,1:0.06程度の比率で調整することができる。 Actually, the swing width until the tip of the working piece 1111a that contacts the working plate changes from the “bent” state to the “bend back” state, and the amount of the swing width in the reverse direction is about 8 mm, for example. In this case, the amount by which the action member 1111 moves in the direction in which it acts on the operation plate 105, that is, the adjustment amount of the gap, can be adjusted at a ratio of about 1: 0.06, about 0.5 mm. .

このため,調整作業にあたっては,ペンチなどの先端が細い工具を用いて作用片を挟み,作用部材が作動板方向に回転する方向に曲げ戻すように調整することで,作業を行うことができる。また,曲げ戻し量に対して間隙が変化する量が非常に小さいため,曲げ戻し量に対して間隙が変化する量が1:1である場合に比べて,作業の精密さは要求されず,また,曲げ戻しを最大限に行った場合でも,曲げの量が一定量以下にでき,調整しすぎるということがない。また,各極独立して可動子と作動版との間隙の調整作業を行え,製造時のばらつきをより細かく調整することができる。 For this reason, in the adjustment work, the work piece can be sandwiched by using a tool having a thin tip such as pliers and adjusted so that the action member is bent back in the direction of rotation in the direction of the working plate. In addition, since the amount of change in the gap with respect to the amount of bending back is very small, the precision of work is not required compared to the case in which the amount of change in the gap with respect to the amount of bending back is 1: 1. Also, even when bending back is performed to the maximum, the amount of bending can be kept below a certain level and there is no excessive adjustment. In addition, the gap between the mover and the working plate can be adjusted independently for each pole, and variations during manufacturing can be finely adjusted.

また,予め,作用片の一部を作用方向に対して折り曲げて構成しているため,作業者にとっては,その場所を用いて調整を行えばよいということが分かりやすく,不用意に他の場所を折り曲げる可能性を未然に低減することができるという効果がある。また,回路遮断器に過電流引外し装置を取り付けた状態で調整作業を行った場合でも,回路遮断器または可動子の意図しない部分の変形などがなく,折り曲げ加工という簡単な構造であること,調整が容易であることと相まって,製造コストを低減できるという効果がある。 In addition, since a part of the action piece is bent in advance with respect to the action direction, it is easy for the operator to understand that adjustment should be performed using that place, and inadvertently other places. There is an effect that the possibility of bending the sheet can be reduced. In addition, even when adjustment work is performed with an overcurrent tripping device attached to the circuit breaker, there is no unintentional deformation of the circuit breaker or the mover, and it has a simple structure called bending. Combined with the ease of adjustment, the manufacturing cost can be reduced.

次に,実施例2について説明を行う。
図8に,実施例2に係わる作用部材の拡大図を示した。本実施例については,固定子との組み付け構造や,可動子の組み付け構造は実施例1と同様である。本実施例においては,作用片1111dに設けた調整手段の折り曲げ構造を,曲げ部を複数有して略くの字状に形成したものである。
Next, Example 2 will be described.
In FIG. 8, the enlarged view of the action member concerning Example 2 was shown. In the present embodiment, the assembly structure with the stator and the assembly structure of the mover are the same as those in the first embodiment. In this embodiment, the bending structure of the adjusting means provided on the action piece 1111d is formed in a substantially square shape having a plurality of bent portions.

調整時には,略くの字状の部分を,実施例1と同じく,ペンチなどの先端で挟み,くの字状の部分を延ばして調整する。 At the time of adjustment, as in the first embodiment, the substantially letter-shaped part is sandwiched between the tips of pliers or the like, and the letter-shaped part is extended and adjusted.

この構造における特徴は,調整が必要と見込まれる調整可能量を確保する時に,作用片を一方向に折り曲げて該作用片を構成する場合と比較して,作用片が占める空間を低減させることができることにある。このため,実施例1の効果に加えて,回路遮断器の筐体の中における限られたスペース有効に利用できる瞬時引外し装置を提供することができる。 The feature of this structure is that when the adjustable amount that is expected to be adjusted is secured, the space occupied by the action piece is reduced as compared with the case where the action piece is formed by bending the action piece in one direction. There is something you can do. For this reason, in addition to the effects of the first embodiment, it is possible to provide an instantaneous trip device that can be effectively used in a limited space in the casing of the circuit breaker.

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次に,実施例3について説明を行う。実施例3は,完全電磁形の過電流引外し装置における可動鉄片に本発明の間隙調整手段を設けた例である。 Next, Example 3 will be described. The third embodiment is an example in which the gap adjusting means of the present invention is provided on the movable iron piece in the complete electromagnetic overcurrent tripping device.

完全電磁形の過電流引外し装置は,時延引外しの構成要素として,コイル内部にオイルダッシュポットを備えた電磁石を用いたものである。ダッシュポットの内部には,弾性部材により一方向に付勢させされた鉄心が備えられている。また,コイルの長さ方向には,固定子となる電磁枠が装着され,コイルの一方の開放端には,ダッシュポットの端部と対向するように,前記電磁枠に軸支された可動鉄片が備えられている。可動鉄片は,電磁石の駆動時に,ダッシュポットに吸引されるよう動作する。 The fully electromagnetic overcurrent tripping device uses an electromagnet with an oil dashpot inside the coil as a component of time-delayed tripping. Inside the dashpot is provided an iron core urged in one direction by an elastic member. An electromagnetic frame serving as a stator is mounted in the length direction of the coil, and a movable iron piece pivotally supported by the electromagnetic frame so as to face the end of the dashpot at one open end of the coil. Is provided. The movable iron piece operates to be attracted to the dashpot when the electromagnet is driven.

可動鉄片は,その外形が略Lの字形状に形成されており,ダッシュポットに吸引される側の端部とは,反対側の端部が作動板に作用するよう構成されている。端部は,作動板と所定の間隙を設けて配置されており,この作動板に作用する端部に,実施例1と同様に,調整手段を設けている。調整手段は,前記端部の一部を可動鉄片の作動板への作用方向に対して予め折り曲げて構成しており,調整時には,折り曲げ部を作用方向に沿う方向に曲げ戻すことにより,前記間隙を調整するものである。 The outer shape of the movable iron piece is substantially L-shaped, and the end opposite to the end attracted by the dashpot is configured to act on the operating plate. The end portion is disposed with a predetermined gap from the operating plate, and an adjusting means is provided at the end portion acting on the operating plate, as in the first embodiment. The adjusting means is configured such that a part of the end portion is bent in advance with respect to the direction of action of the movable iron piece on the working plate, and at the time of adjustment, the bent portion is bent back in the direction along the action direction, thereby Is to adjust.

調整作業にあたっては,ペンチなどの先端が細い工具を用いて作用片を挟み,作用部材が作動板方向に回転する方向に曲げ戻すように調整することで,作業を行うことができる。 In the adjustment work, the work piece can be sandwiched by using a tool having a thin tip such as pliers and adjusted so that the action member bends back in the direction of rotation in the direction of the working plate.

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また,実施例3は,実施例1,実施例2と同じく,曲げ戻し量に対して間隙が変化する量が非常に小さいため,曲げ戻し量に対して間隙が変化する量が1:1である場合に比べて,作業の精密さは要求されず,また,曲げ戻しを最大限に行った場合でも,曲げの量が一定量以下にでき,調整しすぎるということがない。また,各極独立して可動子と作動版との間隙の調整作業を行え,製造時のばらつきをより細かく調整することができる。 In the third embodiment, as in the first and second embodiments, the amount of change in the gap with respect to the bending back amount is 1: 1 because the amount of change in the gap with respect to the bending back amount is very small. Compared to a certain case, the precision of the work is not required, and even when the bending back is performed to the maximum, the amount of bending can be kept below a certain amount and it is not over-adjusted. In addition, the gap between the mover and the working plate can be adjusted independently for each pole, and variations during manufacturing can be finely adjusted.

また,予め,作用片の一部を作用方向に対して折り曲げて構成しているため,作業者にとっては,その場所を用いて調整を行えばよいということが分かりやすく,不用意に他の場所を折り曲げる可能性を未然に低減することができるという効果がある。また,回路遮断器に過電流引外し装置を取り付けた状態で調整作業を行った場合でも,回路遮断器または可動子の意図しない部分の変形などがなく,折り曲げ加工という簡単な構造であること,調整が容易であることと相まって,製造コストを低減できるという効果がある。 In addition, since a part of the action piece is bent in advance with respect to the action direction, it is easy for the operator to understand that adjustment should be performed using that place, and inadvertently other places. There is an effect that the possibility of bending the sheet can be reduced. In addition, even when adjustment work is performed with an overcurrent tripping device attached to the circuit breaker, there is no unintentional deformation of the circuit breaker or the mover, and it has a simple structure called bending. Combined with the ease of adjustment, the manufacturing cost can be reduced.

100 回路遮断器
101 操作ハンドル
102 開閉機構部
103 接点装置
104 クロスバー
105 作動板
110 引外し装置
1111 作用部材
1111a 作用片
1111b 孔部
1111c 孔部
1111d 作用片
1111e 作用片
1112 可動鉄片
1102 固定子
1051 係合片
1021 主軸受
DESCRIPTION OF SYMBOLS 100 Circuit breaker 101 Operation handle 102 Opening-and-closing mechanism part 103 Contact device 104 Crossbar 105 Actuating plate 110 Tripping device 1111 Action member 1111a Action piece 1111b Hole 1111c Hole 1111d Action piece 1111e Action piece 1112 Movable iron piece 1102 Stator 1051 Engagement Joint piece 1021 Main bearing

Claims (2)

電路に発生した過電流を検出し,瞬時引外し特性を有する瞬時引外し装置を備えた多極回路遮断器において,
各極毎の瞬時引外し装置を構成する可動鉄片と連動して開閉機構を動作させるよう作用する作用部材の作用片自体を,開閉機構への作用方向に対して予め折り曲げて構成し,
開閉機構と作用片との間隙を調整する時には,折り曲げて構成した作用片自体の曲げを作用方向に沿う方向に曲げ戻すことにより,間隙を調整する間隙調整手段を設けたことを特徴とする回路遮断器の瞬時引外し装置。
In a multi-pole circuit breaker equipped with an instantaneous trip device that detects overcurrent generated in the circuit and has instantaneous trip characteristics.
The action piece of the action member acting to operate the opening / closing mechanism in conjunction with the movable iron piece constituting the instantaneous tripping device for each pole is configured by bending in advance with respect to the direction of action to the opening / closing mechanism ,
When adjusting the gap between the opening / closing mechanism and the action piece, the circuit is provided with a gap adjusting means for adjusting the gap by bending back the bending of the action piece itself configured in the direction of action. Breaker instantaneous trip device.
前記間隙調整手段における折り曲げ部分は,曲げ部を複数有して略くの字状に形成され,略くの字状の曲げ部の曲げ戻しによって延びる方向が作用方向に沿う方向に一致することを特徴とする請求項1記載の瞬時引外し装置。
Bent portions fraction of the gap adjusting means is formed to bend to the shape of the substantially dog has a plurality, the extending direction by the return bend-shaped bent portion of the substantially L coincides with the direction along the direction of action The instantaneous tripping device according to claim 1.
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