JP4289134B2

JP4289134B2 - Electromagnetic device

Info

Publication number: JP4289134B2
Application number: JP2003394657A
Authority: JP
Inventors: 正己前澤; 和司川村
Original assignee: Panasonic Corp; Matsushita Electric Works Ltd
Current assignee: Panasonic Corp; Panasonic Electric Works Co Ltd
Priority date: 2003-11-25
Filing date: 2003-11-25
Publication date: 2009-07-01
Anticipated expiration: 2023-11-25
Also published as: JP2005158457A

Description

本発明は、電磁装置、特に回路遮断器に用いられる電磁引外し装置のような電磁装置に関するものである。 The present invention relates to an electromagnetic device, particularly an electromagnetic device such as an electromagnetic trip device used in a circuit breaker.

図５に従来の電磁引外し装置を用いた回路遮断器の断面図を示す。この回路遮断器は、一側面が開口した箱状のボディ１０と、このボディ１０の開口に被着されるカバー（図示せず）とからなるハウジングに、電源側端子１１と、負荷側端子１２と、両端子１１，１２間の電路に設けられた固定接点１３及び可動接点１４からなる接点部１５と、ハンドル１７の開閉操作に応じて接点部１５を接触又は開離させる開閉機構部１６と、接点部１５の閉極時に開閉機構部１６のラッチ引外しレバー１８が押し下げられると可動接点１４を固定接点１３から強制的に引き外すトリップ機構（図示せず）と、両端子１１，１２間の電路に過大な負荷電流が流れた時にラッチ引外しレバー１８を押し下げ駆動してトリップ機構によるトリップ動作を行わせる電磁引外し装置１とを収納してある（例えば特許文献１参照）。 FIG. 5 shows a cross-sectional view of a circuit breaker using a conventional electromagnetic trip device. This circuit breaker includes a power source side terminal 11 and a load side terminal 12 in a housing composed of a box-like body 10 having one open side and a cover (not shown) attached to the opening of the body 10. A contact portion 15 including a fixed contact 13 and a movable contact 14 provided on the electric path between the terminals 11 and 12, and an opening / closing mechanism portion 16 that contacts or separates the contact portion 15 according to an opening / closing operation of the handle 17. A trip mechanism (not shown) that forcibly removes the movable contact 14 from the fixed contact 13 when the latch release lever 18 of the switching mechanism 16 is pushed down when the contact 15 is closed, and between the terminals 11 and 12. And an electromagnetic trip device 1 that pushes down and drives the latch trip lever 18 to perform a trip operation by a trip mechanism when an excessive load current flows in the electric circuit (see, for example, Patent Document 1).

この電磁引外し装置１は、図４（ａ）（ｂ）に示すようにコイル２０が巻回された鉄心部７を有し、この鉄心部７の長手方向における略中間部にＬ字形のヨーク８の横片８ａを固着してコ字形の磁気回路を形成している。 The electromagnetic trip device 1 has an iron core portion 7 around which a coil 20 is wound as shown in FIGS. 4A and 4B, and an L-shaped yoke is provided at a substantially intermediate portion in the longitudinal direction of the iron core portion 7. Eight horizontal pieces 8a are fixed to form a U-shaped magnetic circuit.

鉄心部７は、非磁性材料により有底筒状に形成されたポット７ａ内に、磁性材料で形成されたプランジャ７ｂと、プランジャ７ｂを底部側に押圧するコイルばね７ｃとを収納するとともに、ポット７ａにシリコンオイルのような高粘度の制動油を充填し、ポット７ａの開口を磁性材料から円盤状に形成されたヘッド７ｄで封止したものである。 The iron core portion 7 accommodates a plunger 7b formed of a magnetic material and a coil spring 7c that presses the plunger 7b toward the bottom in a pot 7a formed of a nonmagnetic material in a bottomed cylindrical shape. 7a is filled with high-viscosity braking oil such as silicon oil, and the opening of the pot 7a is sealed with a head 7d formed in a disk shape from a magnetic material.

またヨーク８は負荷側端子１２が設けられた端子板２１に取着されており、ヨーク８の縦片８ｂの先端部にはラッチ引外しレバー１８を押し下げ駆動するアマチュア９が回動自在に取り付けられている。アマチュア９は磁性材料により矩形板状に形成されており、長手方向の一端部に穿設された係合孔９ａをヨーク８の縦片８ｂの先端部に設けた係合突起８ｃに係合させることで回動自在に取着されており、長手方向の他端部（自由端）がラッチ引外しレバー１８の上側面に対向し、長手方向の中間部がヘッド７ｄの上面に対向している。そして、アマチュア９の自由端とヨーク８の係合突起８ｃとの間にはコイルばね１９が張架されており、このコイルばね１９によってアマチュア９はヘッド７ｄから離れる向きに付勢されている。 Further, the yoke 8 is attached to a terminal plate 21 provided with a load side terminal 12, and an armature 9 that pushes down and drives a latch release lever 18 is rotatably attached to the tip of a vertical piece 8 b of the yoke 8. It has been. The amateur 9 is formed in a rectangular plate shape by a magnetic material, and an engagement hole 9a drilled at one end in the longitudinal direction is engaged with an engagement protrusion 8c provided at the tip of the vertical piece 8b of the yoke 8. The other end portion (free end) in the longitudinal direction is opposed to the upper side surface of the latch release lever 18, and the middle portion in the longitudinal direction is opposed to the upper surface of the head 7d. . A coil spring 19 is stretched between the free end of the armature 9 and the engaging projection 8c of the yoke 8, and the armature 9 is urged away from the head 7d by the coil spring 19.

ここで、コイル２０は電源側端子１１と負荷側端子１２との間の電路に設けられ、ポット７ａの上側部分（ヨーク８の横片８ａが固着された部位よりも上側）に巻回されており、コイル２０に負荷電流が流れると、コイル２０が励磁されて磁界が発生し、この磁界によって鉄心部７とヨーク８とアマチュア９とからなる磁気経路に磁束が流れる。このとき、鉄心部７のポット７ａ内に収納されたプランジャ７ｂが励磁されて、コイルばね７ｃのばね力に抗してヘッド７ｄ側に引き寄せされ、ポット７ａ内を上側に移動する（すなわちコイル２０内に吸い込まれる）。なおポット７ａ内には制動油が封入されているので、制動油によってプランジャ７ｂの急激な移動を阻止する力が働き、プランジャ７ｂは徐々に上側へ移動するようになっている。つまり鉄心部７として所謂オイルダッシュポットのような遅延動作機構を備えたものを用いている。そして、プランジャ７ｂがコイル２０内に吸い込まれ、ヘッド７ｄ側に移動すると、鉄心部７とヨーク８とアマチュア９とで構成される磁気回路の磁気抵抗が小さくなり、コイル２０に流れる負荷電流によって発生する磁束が大きくなって、アマチュア９がコイルばね１９のばね力に抗してヘッド７ｄに吸着され、アマチュア９の他端部によりラッチ引外しレバー１８が押し下げ駆動されるので、トリップ機構によるトリップ動作が行われて、接点部１５が強制的に開極させられるのである。 Here, the coil 20 is provided in an electric circuit between the power supply side terminal 11 and the load side terminal 12, and is wound around the upper portion of the pot 7a (above the portion where the lateral piece 8a of the yoke 8 is fixed). When a load current flows through the coil 20, the coil 20 is excited to generate a magnetic field, and a magnetic flux flows through a magnetic path composed of the iron core portion 7, the yoke 8, and the armature 9 by this magnetic field. At this time, the plunger 7b housed in the pot 7a of the iron core portion 7 is excited and pulled toward the head 7d against the spring force of the coil spring 7c, and moves upward in the pot 7a (that is, the coil 20). Inhaled). Since the brake oil is sealed in the pot 7a, a force that prevents the plunger 7b from moving suddenly acts by the brake oil, and the plunger 7b gradually moves upward. That is, the iron core portion 7 is provided with a delay operation mechanism such as a so-called oil dash pot. When the plunger 7b is sucked into the coil 20 and moves to the head 7d side, the magnetic resistance of the magnetic circuit composed of the iron core portion 7, the yoke 8, and the armature 9 is reduced, and is generated by the load current flowing through the coil 20. The armature 9 is attracted to the head 7d against the spring force of the coil spring 19 and the latch release lever 18 is driven to be pushed down by the other end of the armature 9 so that the trip operation is performed by the trip mechanism. And the contact 15 is forcibly opened.

ところで、この電磁引外し装置１に用いられるコイル２０は、１本の銅線を螺旋状（円筒形）に巻回して形成されているが、例えば特許文献２に示されるように、１本のポリエステル銅線からなる硬銅線と、細径の銅線を束ねて形成された可撓銅線とを連結して導電線を構成し、この導電線を１層巻きしてコイルを形成したものも従来より提供されている。
実開平５−１５２９４号公報特開２００２−１５０９１４号公報 Incidentally, the coil 20 used in the electromagnetic trip device 1 is formed by winding one copper wire in a spiral shape (cylindrical shape). For example, as shown in Patent Document 2, one coil 20 is used. A conductive wire is formed by connecting a hard copper wire made of polyester copper wire and a flexible copper wire formed by bundling thin copper wires, and a coil is formed by winding this conductive wire in one layer Has also been provided.
Japanese Utility Model Publication No. 5-15294 JP 2002-150914 A

上述した電磁引外し装置は回路遮断器に用いられるもので、回路遮断器は、様々な用途（定格電流と遮断容量）に適応するために多品種のものが提供されているので、電磁引外し装置のコイルも多品種となっていた。 The above-mentioned electromagnetic trip device is used for a circuit breaker, and various types of circuit breakers are provided to adapt to various applications (rated current and breaking capacity). There were many types of coils in the device.

例えば特許文献１に示されるコイル２０では、定格電流の違いに応じてコイル２０を構成する銅線の線径（すなわち断面積）を変えることで対応している。図６（ａ）は定格電流が小さい場合のコイル２０、同図（ｂ）は定格電流が大きい場合のコイル２０をそれぞれ示し、定格電流が小さい場合は定格電流が大きい場合に比べて銅線の線径を小さくできるが、磁束を大きくするためにターン数が多くなっている。このように銅線の線径を変えることで定格電流の違いに対応する場合は、定格電流の種類だけ線径の異なる複数種類の銅線を使用する必要があり、部品の種類が増加して電磁装置のコスト高を招くという問題があった。 For example, in the coil 20 shown in Patent Document 1, this is dealt with by changing the diameter (that is, the cross-sectional area) of the copper wire constituting the coil 20 according to the difference in the rated current. 6A shows the coil 20 when the rated current is small, and FIG. 6B shows the coil 20 when the rated current is large. When the rated current is small, the copper wire is compared to when the rated current is large. Although the wire diameter can be reduced, the number of turns is increased to increase the magnetic flux. In order to cope with the difference in rated current by changing the wire diameter of the copper wire in this way, it is necessary to use multiple types of copper wires with different wire diameters for the type of rated current, and the types of parts increase. There was a problem that the cost of the electromagnetic device was increased.

また特許文献２に示されるコイルでは、１本のポリエステル銅線からなる硬銅線と、複数の細径銅線を束ねて形成された可撓銅線を連結して導電線を形成し、ポリエステル銅線の長さを変えることで定格電流の違いに対応しているが、定格電流に合わせてポリエステル銅線の長さを変えているため、切断されたポリエステル銅線の部分が無駄になって電磁装置のコスト高を招いたり、製造の手間がかかるという問題があった。 Moreover, in the coil shown by patent document 2, the hard copper wire which consists of one polyester copper wire, and the flexible copper wire formed by bundling a plurality of small diameter copper wires are connected, and a conductive wire is formed. By changing the length of the copper wire, it corresponds to the difference in the rated current, but because the length of the polyester copper wire is changed according to the rated current, the portion of the cut polyester copper wire is wasted There was a problem in that the cost of the electromagnetic device was increased and it took time to manufacture.

本発明は上記問題点に鑑みて為されたものであり、その目的とするところは、部品の種類を少なくして低コスト化を図った電磁装置を提供することにある。また、請求項２〜５の発明の目的とするところは、上記の目的に加えて、製造の手間を減らした電磁装置を提供することにある。 The present invention has been made in view of the above problems, and an object of the present invention is to provide an electromagnetic device that is reduced in cost by reducing the types of components. In addition to the above object, an object of the present invention is to provide an electromagnetic device with reduced manufacturing effort.

上記目的を達成するために、請求項１の発明は、電源側端子と、負荷側端子と、電源側端子と負荷側端子との間の電路に設けられた接点部と、操作部の操作に応じて接点部を接触又は開離させる開閉機構部とを備えた回路遮断器に用いられ、接点部に流れる電流によって励磁されるコイルを具備し、コイルに過大な負荷電流が流れると開閉機構部を駆動して接点部を強制的に引き外す電磁装置であって、コイルが、それぞれ線径の同じ導電線を互いに異なる内径で螺旋状に１層巻きして形成され、入れ子状に重ねて配置される複数の単層コイルと、複数の単層コイルを直列接続又は並列接続の何れかで接続するために複数の単層コイルの端部間を電気的に接続する導電部材とを備えるとともに、複数の単層コイルがそれぞれ巻装される複数のボビンを備え、複数のボビンの内の少なくとも一部と一体的に導電部材を設けたことを特徴とする。 In order to achieve the above object, the invention of claim 1 is directed to the operation of the power supply side terminal, the load side terminal, the contact portion provided in the electric circuit between the power supply side terminal and the load side terminal, and the operation portion. Used in a circuit breaker having an opening / closing mechanism that contacts or separates the contact according to the coil, and is provided with a coil that is excited by the current flowing through the contact, and the switching mechanism when an excessive load current flows through the coil. Is an electromagnetic device that forcibly pulls out the contact portion by driving the coil, and each coil is formed by winding one conductive layer having the same wire diameter in a spiral shape with different inner diameters, and nesting the layers. Rutotomoni comprising a plurality of single-layer coils, and a conductive member for electrically connecting the ends of a plurality of single-layer coils for connecting a plurality of single layers coils either in series or parallel connection A plurality of single-layer coils wound respectively It comprises a bottle, characterized in that a least a portion integrally with the conductive member of the plurality of bobbins.

請求項２の発明は、請求項１の発明において、複数の単層コイルの巻方向が同じ方向であることを特徴とする。 The invention of claim 2 is characterized in that, in the invention of claim 1, the winding directions of the plurality of single-layer coils are the same.

請求項３の発明は、請求項１の発明において、複数の単層コイルは、隣接して配置される単層コイルの巻方向が互いに逆向きであることを特徴とする。 According to a third aspect of the present invention, in the first aspect of the invention, the plurality of single layer coils are characterized in that the winding directions of the adjacent single layer coils are opposite to each other.

以上説明したように、請求項１の発明では、線径の同じ導電線を螺旋状に１層巻して、内径が互いに異なる複数の単層コイルを形成し、これら複数の単層コイルを入れ子状に重ねて配置して、複数の単層コイルの間を直列接続又は並列接続の何れかで接続することによってコイルを構成しており、複数の単層コイルの接続の仕方（つまり複数の単層コイルの組み合わせ）を変えることで定格電流の違いに対応できるので、従来のようにコイルを構成する銅線の線径を品種毎に変える場合に比べて、部品の品種を少なくでき、それによって電磁装置の低コスト化が図れるという効果がある。そのうえ、複数の単層コイルがそれぞれ巻装される複数のボビンの内の少なくとも一部と一体的に複数の単層コイルの間を電気的に接続する導電部材を設けているので、部品数を少なくでき、しかも単層コイルが巻装されたボビンを入れ子状に重ねて配置することで導電部材の組込作業が行えるから、導電部材を介して単層コイルの間を容易に接続することができ、組立の手間を少なくできる。 As described above, according to the first aspect of the present invention, a plurality of single-layer coils having different inner diameters are formed by spirally winding one conductive wire having the same wire diameter, and nesting the plurality of single-layer coils. The coils are configured by overlapping and arranging the single-layer coils in either a serial connection or a parallel connection, and a method for connecting the single-layer coils (that is, a plurality of single-layer coils). By changing the combination of layer coils), it is possible to cope with the difference in the rated current, so compared to the case where the wire diameter of the copper wire constituting the coil is changed for each type, the number of parts can be reduced. There is an effect that the cost of the electromagnetic device can be reduced. In addition, a conductive member is provided to electrically connect the plurality of single-layer coils integrally with at least a part of the plurality of bobbins around which the plurality of single-layer coils are wound. In addition, since the conductive member can be assembled by nesting the bobbin around which the single layer coil is wound, the single layer coil can be easily connected via the conductive member. This can reduce assembly work.

請求項２の発明では、巻方向が同じ方向の単層コイルを用いているので、部品の種類をさらに少なくして、低コスト化を図ることができ、且つ、複数の単層コイルを並列に接続する場合には、複数の単層コイルの同じ側の端部同士を電気的に接続すれば良く、組立の手間を少なくできるという効果もある。 In the invention of claim 2, since the single-layer coil having the same winding direction is used, the number of parts can be further reduced, the cost can be reduced, and a plurality of single-layer coils can be arranged in parallel. In the case of connection, it suffices to electrically connect the end portions on the same side of the plurality of single-layer coils, and there is an effect that the labor of assembly can be reduced.

請求項３の発明では、隣接して配置される単層コイルの巻方向が互いに逆向きであるので、複数の単層コイルを直列に接続する場合には、隣接して配置された単層コイルの同じ側の端部同士を電気的に接続すれば良く、組立の手間を少なくできるという効果がある。 In the invention of claim 3, since the winding directions of the adjacent single layer coils are opposite to each other, when connecting a plurality of single layer coils in series, the adjacent single layer coils are arranged. It is only necessary to electrically connect the end portions on the same side of each other, and there is an effect that the labor of assembly can be reduced.

以下に本発明の実施の形態を図面に基づいて説明する。 Embodiments of the present invention will be described below with reference to the drawings.

（基本構成）
以下では本発明を回路遮断器の電磁引外し装置に適用した実施形態を説明するが、先ず電磁引外し装置の基本構成を図１及び図２に基づいて説明する。この電磁引外し装置は、背景技術で説明した図５に示す回路遮断器に用いられるものであり、コイル以外の電磁引外し装置および回路遮断器の構成は背景技術に記載のものと同様であるので、共通する構成要素には同一の符号を付して、図示および説明は省略する。 (Basic configuration)
In the following, an embodiment in which the present invention is applied to an electromagnetic trip device for a circuit breaker will be described. First, the basic configuration of the electromagnetic trip device will be described with reference to FIGS. This electromagnetic trip device is used for the circuit breaker shown in FIG. 5 described in the background art, and the configurations of the electromagnetic trip device and the circuit breaker other than the coil are the same as those described in the background art. Therefore, the same components are denoted by the same reference numerals, and illustration and description thereof are omitted.

図１（ａ）（ｂ）は電磁引外し装置１の要部の断面図であり、接点部に流れる負荷電流によって励磁されるコイル２と、コイル２に挿通される鉄心部７とを有し、この鉄心部７の長手方向における略中間部にＬ字形のヨーク（図示せず）の横片を固着してコ字形の磁気回路を形成している。 FIGS. 1A and 1B are cross-sectional views of the main part of the electromagnetic trip device 1, which includes a coil 2 excited by a load current flowing through a contact portion and an iron core portion 7 inserted through the coil 2. FIG. A transverse piece of an L-shaped yoke (not shown) is fixed to a substantially middle portion in the longitudinal direction of the iron core portion 7 to form a U-shaped magnetic circuit.

コイル２は、図２に示すように、それぞれ表面が絶縁された線径の同じ導電線を互いに異なる内径で螺旋状（円筒形）に１層巻きして形成され、入れ子状に重ねて配置される複数（例えば３個）の単層コイル３ａ〜３ｃと、これら３個の単層コイル３ａ〜３ｃを直列接続又は並列接続の何れかで接続するために３個の単層コイル３ａ〜３ｃの端部間を電気的に接続する導電体（導電部材）６ａ，６ｂ，６ｄとを備えている。 As shown in FIG. 2, the coil 2 is formed by winding a conductive wire having the same diameter on each surface and spirally wound (cylindrical) with different inner diameters, and arranged in a nested manner. that a plurality of (eg if three) and the single layer coil 3a~3c of these three three monolayers coil 3a~3c to connect with either a single-layer coil 3a~3c series or parallel connection Are provided with conductors (conductive members) 6a, 6b, 6d for electrically connecting the end portions.

例えばコイル２に流れる負荷電流の定格値が小さい場合は、図１（ａ）に示すように、３個の単層コイル３ａ〜３ｃとして、隣接する単層コイル３ａ…の巻方向が逆向きとなるような単層コイル３ａ〜３ｃを用い、これら３個の単層コイル３ａ〜３ｃを入れ子状に重ねて配置し、外側の単層コイル３ａと中央の単層コイル３ｂの軸方向における一端部（下端部）同士を導電体６ａを介して電気的に接続するとともに、中央の単層コイル３ｂと内側の単層コイル３ｃの軸方向における他端部（上端部）同士を導電体６ｂを介して電気的に接続することで、３個の単層コイル３ａ〜３ｃを直列に接続してある。なお、外側の単層コイル３ａの上端部と内側の単層コイル３ｃの下端部にはそれぞれコイル端子６ｃ，６ｃが電気的に接続してある。 For example, when the rated value of the load current flowing through the coil 2 is small, as shown in FIG. 1A, the winding directions of the adjacent single-layer coils 3a to 3c are reversed as the three single-layer coils 3a to 3c. The three single layer coils 3a to 3c are arranged in a nested manner, and one end portion in the axial direction of the outer single layer coil 3a and the central single layer coil 3b is used. The lower end portions are electrically connected to each other through the conductor 6a, and the other end portions (upper end portions) of the central single layer coil 3b and the inner single layer coil 3c in the axial direction are connected to each other through the conductor 6b. Thus, the three single-layer coils 3a to 3c are connected in series. Coil terminals 6c and 6c are electrically connected to the upper end portion of the outer single layer coil 3a and the lower end portion of the inner single layer coil 3c, respectively.

このように３個の単層コイル３ａ…を直列接続した場合、コイル２の電流容量は単層コイル３ａ…を構成する導電線の１本分の電流容量となるが、ターン数は３個の単層コイル３ａ…のターン数の合計となるので、コイル２に発生する磁束を大きくできる。なお、直列接続された３個の単層コイル３ａ…は、隣接する単層コイル３ａ…の巻方向が逆向きとなっているので、コイル２に流れる負荷電流によって各々の単層コイル３ａ…に発生する磁束の向きは同じ向きになっている。 When three single-layer coils 3a are connected in series in this way, the current capacity of the coil 2 is equal to the current capacity of one conductive wire constituting the single-layer coils 3a, but the number of turns is three. Since the total number of turns of the single-layer coils 3a ..., the magnetic flux generated in the coils 2 can be increased. The three single-layer coils 3a connected in series have the winding directions of the adjacent single-layer coils 3a reversed, so that the load current flowing in the coil 2 causes each single-layer coil 3a. The direction of the generated magnetic flux is the same.

一方、コイル２に流れる負荷電流の定格値が大きい場合は、図１（ｂ）に示すように、３個の単層コイル３ａ〜３ｃの巻方向を同じ向きとして、入れ子状に重ねて配置し、３個の単層コイル３ａ〜３ｃの軸方向一端部（上端部）を導電体６ｄを介して電気的に接続するとともに、軸方向他端部（下端部）を導電体６ｄを介して電気的に接続することで、３個の単層コイル３ａ〜３ｃを並列に接続してある。なお、単層コイル３ａ〜３ｃの上端部と下端部にはそれぞれコイル端子６ｃ，６ｃが電気的に接続されている。 On the other hand, when the rated value of the load current flowing in the coil 2 is large, as shown in FIG. 1B, the winding directions of the three single-layer coils 3a to 3c are set in the same direction and are arranged in a nested manner. One end (upper end) in the axial direction of the three single-layer coils 3a to 3c is electrically connected via the conductor 6d, and the other end (lower end) in the axial direction is electrically connected via the conductor 6d. By connecting them together, the three single-layer coils 3a to 3c are connected in parallel. In addition, the coil terminals 6c and 6c are electrically connected to the upper end part and lower end part of the single layer coils 3a-3c, respectively.

このように３個の単層コイル３ａ…を並列接続した場合、コイル２の電流容量は単層コイル３ａ…を構成する導電線の３本分の電流容量となり、電流容量を大きくとることができる。なお、並列接続された３個の単層コイル３ａ…は巻方向が同じ向きとなっているので、コイル２に流れる負荷電流によって各々の単層コイル３ａ…に発生する磁束の向きは同じ向きになる。 When three single-layer coils 3a are connected in parallel in this way, the current capacity of the coil 2 becomes the current capacity of three conductive wires constituting the single-layer coils 3a, and the current capacity can be increased. . Since the three single-layer coils 3a connected in parallel have the same winding direction, the direction of the magnetic flux generated in each single-layer coil 3a by the load current flowing in the coils 2 is the same. Become.

以上説明したように、線径の同じ導電線を螺旋状に１層巻して、内径が互いに異なる複数の単層コイル３ａ…を形成し、これら複数の単層コイル３ａ…を入れ子状に重ねて配置して、複数の単層コイル３ａ…の間を直列接続又は並列接続の何れかで接続することによって電磁引外し装置１のコイル２を構成しており、複数の単層コイル３ａ…の接続の仕方（つまり複数の単層コイル３ａ…の組み合わせ）を変えることで定格電流の違いに対応できるので、従来のようにコイルを構成する銅線の線径を品種毎に変える場合に比べて、部品の品種を少なくでき、それによって電磁引外し装置１を含めた回路遮断器全体の低コスト化を図ることができる。また、コイル２を構成する単層コイル３ａ…として、隣接して配置される単層コイル３ａ…の巻方向が逆向きとなるものを用いた場合は、複数の単層コイル３ａ…を直列に接続する際に、隣接して配置された単層コイル３ａ…の同じ側の端部同士を電気的に接続すれば良く、組立の手間を少なくできる。また更に、コイル２を構成する単層コイル３ａ…として、巻方向が同じ方向の単層コイル３ａ…を用いた場合には、部品の種類をさらに少なくして、低コスト化が図れ、さらに複数の単層コイル３ａ…を並列接続する際には、複数の単層コイル３ａ…の同じ側の端部同士を電気的に接続すれば良いから、組立の手間を少なくできる。 As described above, a single layer of a conductive wire having the same wire diameter is spirally wound to form a plurality of single-layer coils 3a... Having different inner diameters, and the plurality of single-layer coils 3a. The coils 2 of the electromagnetic trip device 1 are configured by connecting the plurality of single-layer coils 3a through serial connection or parallel connection between the plurality of single-layer coils 3a. By changing the connection method (that is, the combination of a plurality of single-layer coils 3a...), It is possible to cope with the difference in rated current, compared to the case where the wire diameter of the copper wire constituting the coil is changed for each product type as in the past Therefore, it is possible to reduce the number of parts, thereby reducing the cost of the entire circuit breaker including the electromagnetic trip device 1. In addition, when the single-layer coils 3a ... constituting the coil 2 are those in which the winding directions of the adjacent single-layer coils 3a ... are reversed, a plurality of single-layer coils 3a ... are connected in series. When connecting, it is only necessary to electrically connect the end portions on the same side of the adjacent single-layer coils 3a... Further, when the single-layer coils 3a of the same winding direction are used as the single-layer coils 3a constituting the coil 2, the number of parts can be further reduced, and the cost can be reduced. When the single-layer coils 3a... Are connected in parallel, it is only necessary to electrically connect the end portions on the same side of the plurality of single-layer coils 3a.

（実施形態１）
以下では本発明を回路遮断器の電磁引外し装置に適用した実施形態を図３（ａ）に基づいて説明する。この電磁引外し装置は、背景技術で説明した図５に示す回路遮断器に用いられるものであり、コイル以外の電磁引外し装置１を含めた回路遮断器の構成は、基本構成で説明した回路遮断器と同様であるので、共通する構成要素には同一の符号を付して、図示および説明は省略する。 (Embodiment 1 )
Hereinafter will be described on the basis of the implementation form of application to an electromagnetic trip device of the circuit breaker of the present invention in FIG. 3 (a). This electromagnetic trip device is used in the circuit breaker shown in FIG. 5 described in the background art, and the circuit breaker including the electromagnetic trip device 1 other than the coil has the circuit described in the basic configuration. Since it is the same as a circuit breaker, the same code | symbol is attached | subjected to a common component and illustration and description are abbreviate | omitted.

基本構成で説明した電磁引外し装置では、導電線が螺旋状に１層巻かれた、互いに内径の異なる３個の単層コイル３ａ〜３ｃを入れ子状に配置し、３個の単層コイル３ａ〜３ｃを直列又は並列に接続してコイル２を形成しているが、本実施形態では各々の単層コイル３ａ〜３ｃを、中空円筒状の樹脂製のボビン４ａ〜４ｃに表面が絶縁された導電線を１層巻きして形成してあり、導電線が巻回されたボビン４ａ〜４ｃを入れ子状に配置してある。３個の単層コイル３ａ〜３ｃは巻方向が同じ方向となるようにボビン４ａ〜４ｃに巻回されており、外側の単層コイル３ａの軸方向一端部（下端部）と中央の単層コイル３ｂの軸方向他端部（上端部）の間をボビン４ａにインサート成形された導電体６ｅを介して電気的に接続するとともに、中央の単層コイル３ｂの軸方向一端部（下端部）と内側の単層コイル３ｃの軸方向他端部（上端部）の間をボビン４ｂにインサート成形された導電体６ｆを介して電気的に接続することで、３個の単層コイル３ａ〜３ｃを直列に接続してある。またボビン４ａには外側の単層コイル３ａの上端部に電気的に接続されるコイル端子６ｃが一体的に設けられ、ボビン４ｃには内側の単層コイル３ｃの下端部に電気的に接続されるコイル端子６ｃが一体的に設けられている。 In the electromagnetic trip device described in the basic configuration, three single-layer coils 3a to 3c, each having a conductive wire wound spirally and having different inner diameters, are arranged in a nested manner, and three single-layer coils 3a are arranged. -3c are connected in series or in parallel to form the coil 2. In this embodiment, the surface of each single-layer coil 3a-3c is insulated by a hollow cylindrical resin bobbin 4a-4c. The conductive wire is formed by winding one layer, and bobbins 4a to 4c around which the conductive wire is wound are arranged in a nested manner. The three single-layer coils 3a to 3c are wound around bobbins 4a to 4c so that the winding direction is the same direction, and one axial end (lower end) of the outer single-layer coil 3a and the central single-layer The other end (upper end) in the axial direction of the coil 3b is electrically connected via a conductor 6e insert-molded on the bobbin 4a, and one end (lower end) in the axial direction of the central single-layer coil 3b. And the other axial end portion (upper end portion) of the inner single-layer coil 3c are electrically connected via a conductor 6f insert-molded on the bobbin 4b, whereby three single-layer coils 3a to 3c are connected. Are connected in series. The bobbin 4a is integrally provided with a coil terminal 6c that is electrically connected to the upper end of the outer single-layer coil 3a. The bobbin 4c is electrically connected to the lower end of the inner single-layer coil 3c. The coil terminal 6c is integrally provided.

このように３個の単層コイル３ａ…を直列接続した場合、コイル２の電流容量は単層コイル３ａ…を構成する導電線の１本分の電流容量となるが、ターン数は３個の単層コイル３ａ…のターン数の合計となるので、コイル２に発生する磁束を大きくできる。なお、直列接続された３個の単層コイル３ａ…は、隣接する単層コイル３ａ…の巻方向が同じ向きとなっているが、外側の単層コイル３ａの下端部と中央の単層コイル３ｂの上端部との間を導電体６ｅを介して電気的に接続するとともに、中央の単層コイル３ｂの下端部と内側の単層コイル３ｃの上端部との間を導電体６ｅを介して電気的に接続しているので、コイル２に流れる負荷電流によって各々の単層コイル３ａ…に発生する磁束の向きは同じ向きになっている。 When three single-layer coils 3a are connected in series in this way, the current capacity of the coil 2 is equal to the current capacity of one conductive wire constituting the single-layer coils 3a, but the number of turns is three. Since the total number of turns of the single-layer coils 3a ..., the magnetic flux generated in the coils 2 can be increased. The three single-layer coils 3a connected in series have the same winding direction in the adjacent single-layer coils 3a, but the lower end portion of the outer single-layer coil 3a and the single-layer coil in the center. The upper end of 3b is electrically connected via a conductor 6e, and the lower end of the central single-layer coil 3b and the upper end of the inner single-layer coil 3c are connected via a conductor 6e. Since they are electrically connected, the direction of the magnetic flux generated in each single-layer coil 3a... By the load current flowing through the coil 2 is the same.

またボビン４ａ，４ｂとそれぞれ一体的に設けられた導電体６ｅ，６ｆを介して３個の単層コイル３ａ…の間を電気的に接続しているので、単層コイル３ａ…が巻回されたボビン４ａ…を入れ子状に重ねて配置することで、導電体６ｅ，６ｆの組込作業が行えるから、導電体６ｅ，６ｆを介して単層コイル３ａ〜３ｃの間を容易に接続することができ、組立の手間を少なくできる。 Further, since the three single-layer coils 3a are electrically connected via the conductors 6e and 6f provided integrally with the bobbins 4a and 4b, respectively, the single-layer coils 3a are wound. Since the bobbins 4a are arranged in a nested manner, the conductors 6e and 6f can be assembled, so that the single-layer coils 3a to 3c can be easily connected via the conductors 6e and 6f. Can be reduced, and assembly work can be reduced.

また導電体６ｅ，６ｆはボビン４ａ，４ｂと一体的に設けられているので、部品点数が少なくなって、組立の手間をさらに少なくできる。なお導電体６ｅ，６ｆはボビン４ａ，４ｂにインサート成形されているが、ボビン４ａ，４ｂに圧入固定するなどしてボビン４ａ，４ｂと一体的に設けても良い。 Further, since the conductors 6e and 6f are provided integrally with the bobbins 4a and 4b, the number of parts is reduced, and the labor for assembly can be further reduced. The conductors 6e and 6f are insert-molded in the bobbins 4a and 4b, but may be provided integrally with the bobbins 4a and 4b by press-fitting and fixing the bobbins 4a and 4b.

また本実施形態では複数の単層コイル３ａ…が直列に接続されているが、複数の単層コイル３ａ…の巻方向を同じ向きとして、入れ子状に重ねて配置し、ボビン４ａ…と一体的に設けられた導電体を介して、複数の単層コイル３ａ…の一端部間と、他端部間をそれぞれ電気的に接続することで、複数の単層コイル３ａ…を並列に接続しても良く、この場合は直列接続の場合に比べて電流容量を大きくとることができる。 In the present embodiment, a plurality of single-layer coils 3a are connected in series. However, the winding directions of the plurality of single-layer coils 3a are the same direction, and are arranged in a nested manner so as to be integrated with the bobbins 4a. Are connected in parallel by electrically connecting one end of the plurality of single-layer coils 3a ... and the other end of the single-layer coils 3a ... In this case, the current capacity can be increased as compared with the case of series connection.

（参考例）
以下では本発明の参考例を図３（ｂ）に基づいて説明する。この電磁引外し装置は、背景技術で説明した図５に示す回路遮断器に用いられるものであり、コイル以外の電磁引外し装置１を含めた回路遮断器の構成は実施形態１又は基本構成で説明したものと同様であるので、共通する構成要素には同一の符号を付して、図示および説明は省略する。 (Reference example)
Below, the reference example of this invention is demonstrated based on FIG.3 (b). This electromagnetic trip device is used in the circuit breaker shown in FIG. 5 described in the background art, and the configuration of the circuit breaker including the electromagnetic trip device 1 other than the coil is the first embodiment or the basic configuration. Since it is the same as that described , common constituent elements are denoted by the same reference numerals, and illustration and description thereof are omitted.

基本構成で説明した電磁引外し装置では、導電線が螺旋状に１層巻かれた、互いに内径の異なる３個の単層コイル３ａ〜３ｃを入れ子状に配置し、３個の単層コイル３ａ〜３ｃを直列又は並列に接続してコイル２を形成しているのに対して、本実施形態のコイル２は、３個の単層コイル３ａ〜３ｃの軸方向における両側部に一対のキャップ部材５ａ，５ｂをそれぞれ配置し、これら一対のキャップ部材５ａ，５ｂにインサート成形された導電体６ｇ，６ｈを介して３個の単層コイル３ａ〜３ｃの間を電気的に接続している。 In the electromagnetic trip device described in the basic configuration, three single-layer coils 3a to 3c, each having a conductive wire wound spirally and having different inner diameters, are arranged in a nested manner, and three single-layer coils 3a are arranged. 3c are connected in series or in parallel to form the coil 2, the coil 2 of the present embodiment has a pair of cap members on both sides in the axial direction of the three single-layer coils 3a to 3c. 5a and 5b are arranged, respectively, and the three single-layer coils 3a to 3c are electrically connected via conductors 6g and 6h insert-molded in the pair of cap members 5a and 5b.

キャップ部材５ａ，５ｂは合成樹脂により略円盤状に形成されて、中央部に鉄心部７が挿通される挿通孔５ｃ，５ｃを具備しており、単層コイル３ａ…の軸方向一端側（図３（ｂ）中の上側）に配置されるキャップ部材５ａには、外側の単層コイル３ａと中央の単層コイル３ｂの上端部同士を電気的に接続する導電体６ｇがインサート成形により一体的に設けられ、軸方向他端側に配置されるキャップ部材５ｂには、中央の単層コイル３ｂと内側の単層コイル３ｃの下端部同士を電気的に接続する導電体６ｈがインサート成形により一体的に設けられている。また上側のキャップ部材５ａには内側の単層コイル３ｃの上端部に電気的に接続されるコイル端子６ｃが一体的に設けられ、下側のキャップ部材５ｂには外側の単層コイル３ａの下端部に電気的に接続されるコイル端子６ｃが一体的に設けられている。 The cap members 5a and 5b are formed in a substantially disc shape from a synthetic resin, and include insertion holes 5c and 5c through which the iron core portion 7 is inserted at the center, and one end side in the axial direction of the single-layer coils 3a (see FIG. 3 (b), the conductor 6g electrically connecting the upper ends of the outer single-layer coil 3a and the central single-layer coil 3b is integrally formed by insert molding. The conductor 6h that electrically connects the lower ends of the single-layer coil 3b at the center and the single-layer coil 3c at the inside is integrated with the cap member 5b disposed on the other end side in the axial direction by insert molding. Provided. The upper cap member 5a is integrally provided with a coil terminal 6c electrically connected to the upper end portion of the inner single-layer coil 3c, and the lower cap member 5b is provided with a lower end of the outer single-layer coil 3a. The coil terminal 6c electrically connected to the part is integrally provided.

而して、このコイル２を組み立てるに当たっては、先ずキャップ部材５ａの挿通孔５ｃに鉄心部７のポット７ａを通し、３個の単層コイル３ａ〜３ｃを入れ子状に重ねるようにしてポット７ａに挿通する。その後、キャップ部材５ｂの挿通孔５ｃに鉄心部７のポット７ａを通して、３個の単層コイル３ａ〜３ｃの両側にキャップ部材５ａ，５ｂを配置して組立を完了する。この時、外側の単層コイル３ａと中央の単層コイル３ｂの上端部が上側のキャップ部材５ａに一体的に設けられた導電体６ｇを介して電気的に接続され、中央の単層コイル３ｂと内側の単層コイル３ｃの下端部が下側のキャップ部材５ｂに一体的に設けられた導電体６ｈを介して電気的に接続されており、３個の単層コイル３ａ〜３ｃは直列に接続されている。また上側のキャップ部材５ａにインサート成形されたコイル端子６ｃが単層コイル３ｃの上端部に、下側のキャップ部材５ｂにインサート成形されたコイル端子６ｃが単層コイル３ａの下端部にそれぞれ電気的に接続され、コイル端子６ｃ，６ｃ間に通電することで、コイル２が励磁される。なお、両側の単層コイル３ａ，３ｃの巻方向は上側から見て右巻きに、中央の単層コイル３ｂの巻方向は上側から見て左巻きとなっており、隣接する単層コイル３ａ…の巻方向が互いに逆向きとなっている。 Thus, when the coil 2 is assembled, first, the pot 7a of the iron core portion 7 is passed through the insertion hole 5c of the cap member 5a, and the three single-layer coils 3a to 3c are nested in the pot 7a. Insert. Thereafter, the cap members 5a and 5b are arranged on both sides of the three single-layer coils 3a to 3c through the pot 7a of the iron core portion 7 through the insertion hole 5c of the cap member 5b to complete the assembly. At this time, the upper ends of the outer single-layer coil 3a and the central single-layer coil 3b are electrically connected via the conductor 6g provided integrally with the upper cap member 5a, and the central single-layer coil 3b. And the lower end of the inner single-layer coil 3c are electrically connected via a conductor 6h provided integrally with the lower cap member 5b, and the three single-layer coils 3a to 3c are connected in series. It is connected. The coil terminal 6c insert-molded on the upper cap member 5a is electrically connected to the upper end portion of the single-layer coil 3c, and the coil terminal 6c insert-molded to the lower cap member 5b is electrically connected to the lower end portion of the single-layer coil 3a. The coil 2 is excited by being energized between the coil terminals 6c and 6c. The winding directions of the single-layer coils 3a and 3c on both sides are clockwise when viewed from above, and the winding direction of the central single-layer coil 3b is counterclockwise when viewed from above. The winding directions are opposite to each other.

このように３個の単層コイル３ａ…を直列接続した場合、コイル２の電流容量は単層コイル３ａ…を構成する導電線の１本分の電流容量となるが、ターン数は３個の単層コイル３ａ…のターン数の合計となるので、コイル２に発生する磁束を大きくできる。 When three single-layer coils 3a are connected in series in this way, the current capacity of the coil 2 is equal to the current capacity of one conductive wire constituting the single-layer coils 3a, but the number of turns is three. Since the total number of turns of the single-layer coils 3a ..., the magnetic flux generated in the coils 2 can be increased.

またキャップ部材５ａ，５ｂとそれぞれ一体的に設けられた導電体６ｇ，６ｈを介して３個の単層コイル３ａ…の間を電気的に接続しているので、キャップ部材５ａ，５ｂと単層コイル３ａ〜３ｃとを鉄心部７に組み込むことで導電体６ｇ，６ｈの組込作業が行えるから、導電体６ｇ，６ｈを介して単層コイル３ａ…の間を容易に接続することができ、組立の手間を少なくできる。 Further, since the three single-layer coils 3a are electrically connected via the conductors 6g and 6h provided integrally with the cap members 5a and 5b, respectively, the cap members 5a and 5b are connected to the single-layer. Since the conductors 6g and 6h can be assembled by incorporating the coils 3a to 3c into the iron core 7, the single-layer coils 3a can be easily connected via the conductors 6g and 6h. Reduces assembly work.

また導電体６ｇ，６ｈはキャップ部材５ａ，５ｂと一体的に設けられているので、部品点数が少なくなって、組立の手間をさらに少なくできる。なお導電体６ｇ，６ｈはキャップ部材５ａ，５ｂにインサート成形されているが、キャップ部材５ａ，５ｂに圧入固定するなどしてキャップ部材５ａ，５ｂと一体的に設けても良い。 Further, since the conductors 6g and 6h are provided integrally with the cap members 5a and 5b, the number of parts is reduced, and the labor for assembly can be further reduced. The conductors 6g and 6h are insert-molded in the cap members 5a and 5b, but may be provided integrally with the cap members 5a and 5b by press-fitting and fixing the cap members 5a and 5b.

なお、本参考例では３個の単層コイル３ａ…が直列に接続されているが、複数の単層コイル３ａ…の巻方向を同じ向きとして、入れ子状に重ねて配置し、一端側のキャップ部材５ａと一体的に設けられた導電体を介して、複数の単層コイル３ａ…の一端部同士を電気的に接続するとともに、他端側のキャップ部材５ｂと一体的に設けられた導電体を介して、複数の単層コイル３ａ…の他端部同士を電気的に接続することで、複数の単層コイル３ａ…を並列に接続しても良く、この場合は直列接続の場合に比べて電流容量を大きくとることができる。 In this reference example , three single-layer coils 3a ... are connected in series, but the winding directions of the plurality of single-layer coils 3a ... A conductor provided integrally with the cap member 5b on the other end side while electrically connecting one ends of the plurality of single-layer coils 3a ... through a conductor provided integrally with the member 5a. The other end portions of the plurality of single-layer coils 3a are electrically connected to each other, so that the plurality of single-layer coils 3a may be connected in parallel. In this case, compared to the case of series connection Current capacity can be increased.

（ａ）（ｂ）は電磁装置の基本構成を示す一部省略せる断面図である。(A) (b) is sectional drawing which can be abbreviate | omitted partially showing the basic composition of an electromagnetic device . （ａ）〜（ｃ）は同上のコイルを構成する単層コイルの断面図である。(A)-(c) is sectional drawing of the single layer coil which comprises the coil same as the above. （ａ）は実施形態１の一部省略せる断面図、（ｂ）は参考例の一部省略せる断面図である。(A) is sectional drawing which can be abbreviate | omitted partially of Embodiment 1 , (b) is sectional drawing which can abbreviate | omit a part of reference example . 従来の電磁引外し装置を示し、（ａ）は外観斜視図、（ｂ）は断面図である。The conventional electromagnetic trip apparatus is shown, (a) is an external appearance perspective view, (b) is sectional drawing. 従来の電磁引外し装置を用いた回路遮断器の断面図である。It is sectional drawing of the circuit breaker using the conventional electromagnetic trip apparatus. （ａ）（ｂ）は従来のコイルを鉄心部に組み込んだ状態の断面図である。(A) (b) is sectional drawing of the state which integrated the conventional coil in the iron core part.

符号の説明Explanation of symbols

２コイル
３ａ〜３ｃ単層コイル
７鉄心部
７ａポット
７ｄヘッド
６ａ，６ｂ，６ｄ導電体
６ｃコイル端子 2 coil 3a-3c single layer coil 7 iron core part 7a pot 7d head 6a, 6b, 6d conductor 6c coil terminal

Claims

電源側端子と、負荷側端子と、電源側端子と負荷側端子との間の電路に設けられた接点部と、操作部の操作に応じて前記接点部を接触又は開離させる開閉機構部とを備えた回路遮断器に用いられ、前記接点部に流れる電流によって励磁されるコイルを具備し、前記コイルに過大な負荷電流が流れると前記開閉機構部を駆動して前記接点部を強制的に引き外す電磁装置であって、
前記コイルが、それぞれ線径の同じ導電線を互いに異なる内径で螺旋状に１層巻きして形成され、入れ子状に重ねて配置される複数の単層コイルと、前記複数の単層コイルを直列接続又は並列接続の何れかで接続するために前記複数の単層コイルの端部間を電気的に接続する導電部材とを備えるとともに、
前記複数の単層コイルがそれぞれ巻装される複数のボビンを備え、前記複数のボビンの内の少なくとも一部と一体的に前記導電部材を設けたことを特徴とする電磁装置。 A power supply side terminal, a load side terminal, a contact portion provided in an electric path between the power supply side terminal and the load side terminal, and an opening / closing mechanism portion that contacts or separates the contact portion according to an operation of the operation portion; And a coil that is excited by a current flowing through the contact portion. When an excessive load current flows through the coil, the switching mechanism portion is driven to force the contact portion. An electromagnetic device to be pulled off,
The coil is formed by spirally winding one conductive wire having the same wire diameter with different inner diameters, and a plurality of single layer coils arranged in a nested manner and the plurality of single layer coils in series and a conductive member for electrically connecting the ends of said plurality of single-layer coils to connect either the connection or parallel connection Rutotomoni,
An electromagnetic device comprising a plurality of bobbins around which each of the plurality of single-layer coils is wound, wherein the conductive member is provided integrally with at least a part of the plurality of bobbins .

前記複数の単層コイルの巻方向が同じ方向であることを特徴とする請求項１記載の電磁装置。 The electromagnetic device according to claim 1, wherein winding directions of the plurality of single-layer coils are the same.

前記複数の単層コイルは、隣接して配置される単層コイルの巻方向が互いに逆向きであることを特徴とする請求項１記載の電磁装置。 2. The electromagnetic device according to claim 1, wherein winding directions of the single-layer coils arranged adjacent to each other in the plurality of single-layer coils are opposite to each other .