JP7302498B2 - circuit breaker - Google Patents

circuit breaker Download PDF

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JP7302498B2
JP7302498B2 JP2020021665A JP2020021665A JP7302498B2 JP 7302498 B2 JP7302498 B2 JP 7302498B2 JP 2020021665 A JP2020021665 A JP 2020021665A JP 2020021665 A JP2020021665 A JP 2020021665A JP 7302498 B2 JP7302498 B2 JP 7302498B2
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circuit breaker
terminal block
accessory device
attached
terminal
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JP2021128842A (en
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貴史 大野
武史 江村
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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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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/08—Terminals; Connections
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • H01H71/0228—Mounting or assembling the different parts of the circuit breaker having provisions for interchangeable or replaceable parts

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Description

本発明は、オートブレーカ、漏電遮断器などの回路遮断器に装着する付属端子台の取付構造に関する。 TECHNICAL FIELD The present invention relates to an attachment structure for an accessory terminal block attached to a circuit breaker such as an auto-breaker and an earth leakage breaker.

特許文献１には、回路遮断器の開閉状態やトリップ状態を捉えて外部に電気信号を出力する付属端子台を、回路遮断器の本体ケースに装着する構造が開示されている。
回路遮断器の本体ケースには、可動接点及び固定接点からなる主回路接点、固定接触子、可動接触子、開閉機構、過電流引外し装置などが内蔵されているとともに、本体ケースの上面には開口部が形成され、本体ケースの側面には、電源側外部端子及び負荷側外部端子に寄った離間した位置に、上下方向に延在する一対の蟻穴が形成されている。
付属端子台は、端子台ケースと、端子台ケースの複数の段差に設けた複数のねじ端子と、補助スイッチ用のねじ端子にリード線を介して接続する補助スイッチと、警報スイッチ用のねじ端子にリード線を介して接続する警報スイッチと、端子台ケースの側面に離間して形成された一対の蟻ほぞが形成されている。 Patent Literature 1 discloses a structure in which an accessory terminal block, which captures the open/closed state and trip state of the circuit breaker and outputs an electric signal to the outside, is attached to the main body case of the circuit breaker.
The body case of the circuit breaker contains the main circuit contacts consisting of the movable contact and the fixed contact, the fixed contact, the movable contact, the switching mechanism, the overcurrent tripping device, etc. An opening is formed, and a pair of vertically extending dovetail holes are formed on the side surface of the body case at spaced apart positions close to the power supply side external terminal and the load side external terminal.
The attached terminal block consists of a terminal block case, a plurality of screw terminals provided on multiple steps of the terminal block case, an auxiliary switch connected to the screw terminal for the auxiliary switch via a lead wire, and a screw terminal for the alarm switch. and a pair of dovetail tenons formed apart from each other on the side surface of the terminal block case.

そして、回路遮断器の本体ケースの側面に向けて付属端子台の側面を上方から近接させていき、本体ケースの側面に形成した一対の蟻穴に、付属端子台の側面に形成した一対の蟻ほぞを嵌入することで、本体ケースの側面に付属端子台が装着される。そして、本体ケースの開口部に補助スイッチ及び警報スイッチを挿入することで、主回路接点（可動接点及び固定接点）のＯＮ，ＯＦＦ状態が補助スイッチ用のねじ端子で電気信号として取り出すことができ、開閉機構のトリップ動作が警報スイッチ用のねじ端子で電気信号として取り出すことができる。 Then, the side surface of the attached terminal block is approached from above toward the side surface of the main body case of the circuit breaker, and the pair of dovetail holes formed on the side surface of the main body case are fitted with the pair of dovetail holes formed on the side surface of the attached terminal block. By inserting the tenon, the attached terminal block is attached to the side of the main body case. By inserting the auxiliary switch and the alarm switch into the opening of the main body case, the ON/OFF state of the main circuit contacts (moving contact and fixed contact) can be taken out as an electric signal with the screw terminal for the auxiliary switch. The tripping action of the opening and closing mechanism can be taken out as an electrical signal at the screw terminal for the alarm switch.

ところで、近年の電気機器は、配線作業を大幅に短縮できる構造として、電線を弾性保持する弾性部材を備えたスプリング端子が採用されてきており（例えば特許文献２）、上述した付属端子台もスプリング端子を採用した構造が開発されている。 By the way, in recent years, electrical equipment has adopted a spring terminal provided with an elastic member that elastically holds the electric wire as a structure that can greatly shorten the wiring work (for example, Patent Document 2). Structures employing terminals have been developed.

特開２００２－３５２８７６号公報JP-A-2002-352876 特許第６５７９２８２号公報Japanese Patent No. 6579282

しかし、スプリング端子を設けた付属端子台を使用すると、スプリング端子への電線の抜き差し方向と、回路遮断器の蟻穴及び付属端子台の蟻ほぞの嵌合方向が同一方向なので、スプリング端子に接続した電線を引き抜く際に、付属端子台が回路遮断器から外れてしまい、付属端子台や回路遮断器の部品が破損するおそれがある。
そこで、本発明は、付属装置に設けたスプリング端子の電線の抜き差し方向と、回路遮断器及び付属装置の係合方向とが同一方向であっても、スプリング端子から電線を引き抜く際に付属装置が回路遮断器から外れるのを防止する回路遮断器を提供することを目的としている。 However, when using the attached terminal block with spring terminals, the direction of insertion and removal of the wire to the spring terminal and the fitting direction of the dovetail hole of the circuit breaker and the dovetail tenon of the attached terminal block are the same. When the electric wire is pulled out, the attached terminal block may come off from the circuit breaker, and the attached terminal block and parts of the circuit breaker may be damaged.
In view of the above, the present invention provides a spring terminal provided in an accessory device, even if the direction in which the wire is inserted and pulled out of the spring terminal and the direction in which the circuit breaker and the accessory device are engaged are the same, the accessory device may be pulled out when the wire is pulled out from the spring terminal. To provide a circuit breaker that prevents disconnection from the circuit breaker.

上記目的を達成するために、本発明の一様態に係る回路遮断器は、回路遮断器の本体ケースと、電線を弾性保持するスプリング端子を備えた付属装置と、本体ケースの側面と側面に向かい合う付属装置の側面とにスライド式の一対の係合部を設け、本体ケースに付属装置を着脱自在に装着する回路遮断器において、スプリング端子の電線引き抜き方向と係合部のスライド方向が同一方向であり、付属装置または本体ケースの少なくとも一方に、本体ケースに対する付属装置のスライド方向の移動を規制する規制部を設けるようにする。 In order to achieve the above object, a circuit breaker according to one aspect of the present invention is a circuit breaker body case, an accessory device having a spring terminal for elastically holding a wire, and a side face of the body case facing each other. In a circuit breaker in which a pair of sliding engaging portions are provided on the side surface of an accessory device and the accessory device is detachably attached to a main body case, the wire pulling direction of the spring terminal and the sliding direction of the engaging portion are the same. At least one of the accessory device and the main body case is provided with a restricting portion for restricting the movement of the accessory device in the sliding direction with respect to the main body case.

本発明に係る回路遮断器によれば、付属装置に設けたスプリング端子の電線の抜き差し方向と、回路遮断器及び付属装置の係合方向とが同一方向であっても、スプリング端子から電線を引き抜く際に付属装置が回路遮断器から外れるのを防止することができる。 According to the circuit breaker of the present invention, the wire is pulled out from the spring terminal even if the direction of insertion and removal of the wire from the spring terminal provided in the accessory device is the same as the direction of engagement between the circuit breaker and the accessory device. It is possible to prevent attachments from coming off the circuit breaker.

本発明に係る第１実施形態の回路遮断器に付属端子台を装着する前の状態を示す斜視図である。FIG. 2 is a perspective view showing a state before attaching an attached terminal block to the circuit breaker of the first embodiment according to the present invention; 第１実施形態の回路遮断器に付属端子台を装着した状態を示す図である。It is a figure which shows the state which mounted|wore the circuit breaker of 1st Embodiment with the attached terminal block. 図２のIII－III線矢視図である。FIG. 3 is a view taken along line III-III in FIG. 2; 第１実施形態の付属端子台に設けた端子台側回転拘束面を示す図である。It is a figure which shows the terminal block side rotation restraint surface provided in the attached terminal block of 1st Embodiment. 第１実施形態の回路遮断器に装着した付属端子台から電線を引き抜いた状態を示す図である。It is a figure which shows the state which pulled out the electric wire from the attached terminal block with which the circuit breaker of 1st Embodiment was mounted|worn. 第２実施形態の回路遮断器に付属端子台を装着する前の状態を示す斜視図である。It is a perspective view which shows the state before mounting|wearing the circuit breaker of 2nd Embodiment with an attached terminal block. 第２実施形態の回路遮断器に付属端子台を装着した状態を示す斜視図である。It is a perspective view which shows the state which mounted|wore the circuit breaker of 2nd Embodiment with the attached terminal block.

次に、図面を参照して、本発明に係る実施形態を説明する。
本発明は、付属装置または本体ケースの少なくとも一方に、本体ケースに対する付属装置のスライド方向の移動を規制する規制部を設けるようにしたものである。
以下の図面の記載において、同一又は類似の部分には同一又は類似の符号を付している。ただし、図面は模式的なものであり、厚みと平面寸法との関係、各層の厚みの比率等は現実のものとは異なることに留意すべきである。したがって、具体的な厚みや寸法は以下の説明を参酌して判断すべきものである。また、図面相互間においても互いの寸法の関係や比率が異なる部分が含まれていることはもちろんである。 Next, embodiments according to the present invention will be described with reference to the drawings.
According to the present invention, at least one of the accessory device and the main body case is provided with a restricting portion that restricts the movement of the accessory device in the sliding direction with respect to the main body case.
In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic, and the relationship between thickness and planar dimension, the ratio of thickness of each layer, and the like are different from the actual ones. Therefore, specific thicknesses and dimensions should be determined with reference to the following description. In addition, it is a matter of course that there are portions with different dimensional relationships and ratios between the drawings.

また、以下に示す実施形態は、本発明の技術的思想を具体化するための装置や方法を例示するものであって、本発明の技術的思想は、構成部品の材質、形状、構造、配置等を下記のものに特定するものでない。本発明の技術的思想は、特許請求の範囲に記載された請求項が規定する技術的範囲内において、種々の変更を加えることができる。 Further, the embodiments shown below are examples of devices and methods for embodying the technical idea of the present invention. etc. are not specified below. Various modifications can be made to the technical idea of the present invention within the technical scope defined by the claims.

［第１実施形態］
図１及び図５を参照して第１実施形態の回路遮断器の付属端子台取付け構造について説明する。なお、各図において、回路遮断器１と、回路遮断器１に付属端子台１４が装着されている状態を示す互いに直交する三方向を、便宜的にＸ１方向、Ｙ１方向及びＺ１方向としているとともに、付属端子台１４を示す互いに直交する三方向を、便宜的にＸ２方向、Ｙ２方向及びＺ２方向としている。
本実施形態は、付属装置の上面側に規制部を設けるようにしたものである。また、規制部として、スライド規制部と、スライド規制部を支点とする付属装置の回動を規制する回動規制部を、付属装置の上面側にそれぞれ設けるようにしたものである。 [First embodiment]
A structure for mounting an attached terminal block of a circuit breaker according to the first embodiment will be described with reference to FIGS. 1 and 5. FIG. In each figure, the three mutually orthogonal directions showing the circuit breaker 1 and the state in which the attached terminal block 14 is attached to the circuit breaker 1 are referred to as the X1 direction, the Y1 direction, and the Z1 direction for the sake of convenience. , the three mutually orthogonal directions showing the attached terminal block 14 are referred to as the X2 direction, the Y2 direction and the Z2 direction for the sake of convenience.
In this embodiment, the restricting portion is provided on the upper surface side of the accessory device. Further, as the restricting portion, a slide restricting portion and a rotation restricting portion for restricting rotation of the accessory device with the slide restricting portion as a fulcrum are provided on the upper surface side of the accessory device.

回路遮断器１は、図１に示すように、Ｚ１方向に重なったケース２及びカバー３とで本体ケース４が構成されており、この本体ケース４の内部に、図示しない固定接触子、可動接触子、開閉機構及び過電流引外し装置が配置されている。本体ケース４のカバー３には開口部５が形成されており、開閉機構に連結した操作ハンドル６が開口部５を通過して外部に突出している。
本体ケース４のＸ１方向の一方側には、可動接触子に接続する３極の電源側外部端子７が外部に露出して設けられているとともに、Ｘ１方向の他方側には、固定接触子に接続する負荷側外部端子８が外部に露出して設けられている。 As shown in FIG. 1, the circuit breaker 1 includes a case 2 and a cover 3 that overlap in the Z1 direction. A switch, an opening and closing mechanism and an overcurrent tripping device are arranged. An opening 5 is formed in the cover 3 of the main body case 4, and an operating handle 6 connected to an opening/closing mechanism passes through the opening 5 and protrudes to the outside.
On one side of the main body case 4 in the X1 direction, a three-pole power supply side external terminal 7 connected to a movable contact is provided to be exposed to the outside, and on the other side in the X1 direction, a fixed contact is provided. A load-side external terminal 8 to be connected is provided so as to be exposed to the outside.

また、開口部５と電源側外部端子７との間のカバー３には、付属端子用カバー９がヒンジ結合されている。カバー３には、図２に示すように、後述する付属端子台の付属スイッチ（補助スイッチ１８、警報スイッチ２０）を挿入する開口部３ａが形成されており、開口部３ａには、補助スイッチ１８を接続する接続凹部１０ａと、警報スイッチ２０を接続する接続凹部１０ｂが形成されている。そして、付属端子用カバー９が開口部３ａを覆う構造とされている。なお、図２では、付属端子用カバー９を除いた状態で回路遮断器１を示している。 An attached terminal cover 9 is hinged to the cover 3 between the opening 5 and the power supply side external terminal 7 . As shown in FIG. 2, the cover 3 is formed with an opening 3a into which the attached switches (auxiliary switch 18, alarm switch 20) of the attached terminal block to be described later are inserted. and a connection recess 10b for connecting the alarm switch 20 are formed. The attached terminal cover 9 covers the opening 3a. 2 shows the circuit breaker 1 without the attached terminal cover 9. As shown in FIG.

ここで、回路遮断器１の互いに直交するＸ１方向及びＺ１方向を含む側面１ａには、電源側外部端子７に近接するＸ１方向の一方側に第１の蟻穴１１がＺ１方向に延在して形成されている。また、負荷側外部端子８に近接する側面１ａのＸ１方向の他方側に第２の蟻穴１２がＺ１方向に延在して形成されている。
また、Ｘ１方向において付属端子用カバー９に対して離間した位置である第２の蟻穴１２の開口部の近くのカバー３には、互いに直交するＹ１方向及びＺ１方向を含む平面形状とした遮断器側回転拘束面１３が形成されている。
一方、付属端子台１４は、端子台ケース１５と、端子台ケース１５に段差状に設けた複数のスプリング端子１６ａ～１６ｅと、補助スイッチ用のスプリング端子１６とリード線１７を介して接続する補助スイッチ１８と、警報スイッチ用のスプリング端子１６とリード線１９を介して接続する警報スイッチ２０と、を備えている。 Here, the first dovetail hole 11 extends in the Z1 direction on one side of the X1 direction close to the power supply side external terminal 7 on the side surface 1a of the circuit breaker 1 including the X1 direction and the Z1 direction which are orthogonal to each other. formed by A second dovetail hole 12 is formed extending in the Z1 direction on the other side in the X1 direction of the side surface 1a adjacent to the load-side external terminal 8 .
In addition, on the cover 3 near the opening of the second dovetail hole 12, which is located apart from the attached terminal cover 9 in the X1 direction, there is provided a plane-shaped block including the Y1 direction and the Z1 direction which are orthogonal to each other. A device-side rotation restraint surface 13 is formed.
On the other hand, the attached terminal block 14 includes a terminal block case 15, a plurality of spring terminals 16a to 16e provided in a stepped manner on the terminal block case 15, and an auxiliary switch connecting the spring terminal 16 and the lead wire 17 for the auxiliary switch. A switch 18 and an alarm switch 20 connected to a spring terminal 16 for alarm switch via a lead wire 19 are provided.

スプリング端子１６ａは、図３に示すように、端子台ケース１５の内部に配置された端子部２１と、端子部２１を覆うように端子台ケース１５に装着した端子カバー２２と、を備えている。端子部２１は、補助スイッチ１８用のリード線１７、或いは警報スイッチ２０用のリード線１９に接続する端子板２３と、端子板２３の先端部に接触して弾性変形自在な２枚の板ばね２４と、板ばね２４の形状を保持する絶縁ブロック２５と、を備えている。２枚の板ばね２４は、逆Ｖ字状の姿勢で絶縁ブロック２５に支持され、それぞれの先端部２４ａが端子板２３の先端部に接触している。また、他のスプリング端子１６ｂ～１６ｅも同一構造とされている。 As shown in FIG. 3 , the spring terminal 16 a includes a terminal portion 21 arranged inside the terminal block case 15 and a terminal cover 22 attached to the terminal block case 15 so as to cover the terminal portion 21 . . The terminal portion 21 includes a terminal plate 23 connected to the lead wire 17 for the auxiliary switch 18 or the lead wire 19 for the alarm switch 20, and two leaf springs which are elastically deformable in contact with the tip of the terminal plate 23. 24 and an insulating block 25 that holds the shape of the leaf spring 24 . The two leaf springs 24 are supported by the insulating block 25 in an inverted V-shaped posture, and their tip portions 24 a are in contact with the tip portion of the terminal plate 23 . Further, the other spring terminals 16b to 16e have the same structure.

端子カバー２２には、２枚の板ばね２４の先端部２４ａに対向して設けられた２つの電線挿入孔２６と、２枚の板ばね２４の先端部２４ａより湾曲部に寄った側に対向して設けられた工具挿入孔２７と、が形成されている。
そして、電線挿入孔２６から電線２８を挿入すると、電線２８に押されて板ばね２４の先端部２４ａ側が弾性変形していき、この板ばね２４の弾性力によって電線２８が端子板２３の先端部側に押し付けられ、引き抜き方向の変位が抑制された状態で、端子板２３に電線２８が接続される。一方、工具挿入孔２７からドライバーなどの工具を差し込むと、先端部２４ａが電線２８から離間するように板ばね２４が弾性変形するので、電線２８の引き抜きを行う。 The terminal cover 22 has two wire insertion holes 26 provided facing the tip portions 24a of the two leaf springs 24, and the two wire insertion holes 26 facing the side closer to the curved portion than the tip portions 24a of the two leaf springs 24. A tool insertion hole 27 provided as a part is formed.
When the wire 28 is inserted through the wire insertion hole 26, the tip 24a of the leaf spring 24 is pushed by the wire 28 and elastically deformed. The electric wire 28 is connected to the terminal plate 23 while being pressed to the side and restrained from being displaced in the pull-out direction. On the other hand, when a tool such as a screwdriver is inserted through the tool insertion hole 27, the leaf spring 24 is elastically deformed so that the tip portion 24a is separated from the wire 28, so that the wire 28 is pulled out.

ここで、本実施例では、本体ケースの側面と付属装置の側面とにスライド式の一対の係合部が設けられている。すなわち、図１に示すように、付属端子台１４の互いに直交するＸ２方向及びＺ２方向を含む側面１４ａには、Ｘ２方向の一方側に第１の蟻ほぞ３０がＺ２方向に延在して形成されている。また、Ｘ２方向の他方側には第２の蟻ほぞ３１がＺ２方向に延在して形成されている。また、付属端子台１４の側面１４ａには、抜け止め部となるスライド規制部４０が形成されており、付属端子台１４を本体ケース４に装着した状態でスライド規制部４０及びリード線を付属端子用カバー９で押さえ込むようにしている。なお、スライド規制部４０は、本体ケース４の側面１ａに設けた蓋部１ｃを取り除いた箇所に装着される。 Here, in this embodiment, a pair of sliding engaging portions are provided on the side surface of the main body case and the side surface of the accessory device. That is, as shown in FIG. 1, a first dovetail tenon 30 extending in the Z2 direction is formed on one side of the X2 direction on the side surface 14a of the attached terminal block 14 including the X2 direction and the Z2 direction which are orthogonal to each other. It is A second dovetail tenon 31 is formed extending in the Z2 direction on the other side in the X2 direction. A slide restricting portion 40 is formed on the side surface 14a of the attached terminal block 14 to prevent it from coming off. A cover 9 for holding it down. The slide restricting portion 40 is attached to a portion where the lid portion 1c provided on the side surface 1a of the main body case 4 is removed.

また、本実施例では、スプリング端子の電線引き抜き方向と係合部のスライド方向が同一方向であり、付属装置に本体ケースに対して付属装置がスライド方向に移動するのを規制する規制部として回動規制部を設けている。本実施例の回動規制部としては、図４に示すように、第２の蟻ほぞ３１の上部に、側面１４ａに対してＹ２方向に膨出する膨出部３２が形成されており、この膨出部３２の一側に、互いに直交するＹ２方向及びＺ２方向を含む平面形状として端子台側回転拘束面３３が形成されている。 Further, in this embodiment, the direction in which the wire is pulled out of the spring terminal and the direction in which the engaging portion slides are the same. A motion control unit is provided. As shown in FIG. 4, as the rotation restricting portion of this embodiment, a bulging portion 32 that bulges in the Y2 direction with respect to the side surface 14a is formed on the upper portion of the second dovetail tenon 31. A terminal block side rotation restraining surface 33 is formed on one side of the bulging portion 32 so as to have a planar shape including the Y2 direction and the Z2 direction that are orthogonal to each other.

上記構成の付属端子台１４は、自身の側面１４ａが回路遮断器１の側面１ａに添うように配置してＺ１方向の上方から下方に近接させていき、回路遮断器１の第１及び第２の蟻穴１１，１２に、付属端子台１４の第１及び第２の蟻ほぞ３０，３１を嵌入することで、図２に示すように回路遮断器１に装着される。ここで、回路遮断器１に付属端子台１４を装着した際には、図２のように、付属端子台１４の第２の蟻ほぞ３１の上部に形成した膨出部３２の端子台側回転拘束面３３と、回路遮断器１の第２の蟻穴１２の穴開口部の近くのカバー３に設けた遮断器側回転拘束面１３とが面接触した状態で当接する。 The attached terminal block 14 configured as described above is arranged so that its side surface 14a is aligned with the side surface 1a of the circuit breaker 1, and is brought closer to the lower side in the Z1 direction. By inserting the first and second dovetail tenons 30 and 31 of the attached terminal block 14 into the dovetail holes 11 and 12 of the attached terminal block 14, the circuit breaker 1 is mounted as shown in FIG. Here, when attaching the attached terminal block 14 to the circuit breaker 1, as shown in FIG. The restraint surface 33 and the circuit breaker-side rotation restraint surface 13 provided on the cover 3 near the hole opening of the second dovetail hole 12 of the circuit breaker 1 come into surface contact with each other.

そして、カバー３の開口部３ａを覆っている付属端子用カバー９を開け、付属端子台１４のリード線１７に接続している補助スイッチ１８を、カバー３の開口部３ａに挿入して接続凹部１０ａに接続し、付属端子台１４のリード線１９に接続している警報スイッチ２０も開口部３ａに挿入して接続凹部１０ｂに接続する。これにより、回路遮断器１の主回路接点（可動接点及び固定接点）のＯＮ，ＯＦＦ状態が、付属端子台１４の所定のスプリング端子１６ａ，１６ｂに接続した電線２８から電気信号として取り出すことができるとともに、開閉機構のトリップ動作が付属端子台１４の所定のスプリング端子１６ｃ～１６ｅに接続した電線２８から電気信号として取り出すことができる。 Then, the accessory terminal cover 9 that covers the opening 3a of the cover 3 is opened, and the auxiliary switch 18 connected to the lead wire 17 of the accessory terminal block 14 is inserted into the opening 3a of the cover 3 to open the connection recess. The alarm switch 20, which is connected to 10a and connected to the lead wire 19 of the attached terminal block 14, is also inserted into the opening 3a and connected to the connection recess 10b. As a result, the ON/OFF states of the main circuit contacts (movable contact and fixed contact) of the circuit breaker 1 can be taken out as electric signals from the wires 28 connected to the predetermined spring terminals 16a and 16b of the attached terminal block 14. At the same time, the trip operation of the opening/closing mechanism can be taken out as an electric signal from the electric wire 28 connected to the predetermined spring terminals 16c to 16e of the attached terminal block 14. FIG.

次に、図５は、回路遮断器１に装着した付属端子台１４のスプリング端子１６ａに電線２８が接続されており、電線２８をスプリング端子１６ａから引き抜く際の付属端子台１４の装着状態を示すものである。
スプリング端子１６ａに接続した電線２８を引き抜く際には、スプリング端子１６ａの接続、引き抜き方向と、回路遮断器１及び付属端子台１４の嵌合方向が同一方向なので、付属端子台１４にＺ１方向の上方に向う外力が発生すると、Ｚ１方向の上方に移動した付属端子台１４が回路遮断器１の付属端子用カバー９に衝突する場合、或いは、回路遮断器１から付属端子台１４の嵌合状態が外れるおそれがある。 Next, FIG. 5 shows a mounting state of the attached terminal block 14 when the electric wire 28 is connected to the spring terminal 16a of the attached terminal block 14 attached to the circuit breaker 1 and the electric wire 28 is pulled out from the spring terminal 16a. It is.
When the electric wire 28 connected to the spring terminal 16a is pulled out, the connecting and pulling out direction of the spring terminal 16a and the fitting direction of the circuit breaker 1 and the attached terminal block 14 are the same. When an upward external force is generated, the attached terminal block 14 moved upward in the Z1 direction collides with the attached terminal cover 9 of the circuit breaker 1, or the fitting state of the attached terminal block 14 from the circuit breaker 1 changes. may come off.

スプリング端子１６ａに接続した電線２８を引き抜く際には、先ず、付属端子台１４に、第１の蟻穴１１及び第１の蟻ほぞ３０の嵌合部位を中心とした矢印Ｒ１方向に回転しようとする回転力が発生する。
付属端子台１４が矢印Ｒ１方向に回転しようとすると、付属端子台１４の回転方向に対して直交して配置されている回路遮断器１の遮断器側回転拘束面１３が付属端子台１４の端子台側回転拘束面３３に対して回転反力を作用するので、付属端子台１４の矢印Ｒ１方向の回転力が打ち消される。このように、スプリング端子１６ａに接続した電線２８を引き抜く際に付属端子台１４に発生する回転力が打ち消されるので、付属端子台１４に対するＺ１方向の上方に向う外力を抑制することができる。 When pulling out the electric wire 28 connected to the spring terminal 16a, first, the attached terminal block 14 is rotated in the direction of the arrow R1 around the fitting portion of the first dovetail hole 11 and the first dovetail tenon 30. A rotating force is generated.
When the attached terminal block 14 tries to rotate in the direction of the arrow R1, the circuit breaker side rotation restraining surface 13 of the circuit breaker 1 arranged orthogonal to the rotation direction of the attached terminal block 14 is pushed to the terminal of the attached terminal block 14. Since a rotational reaction force is applied to the base-side rotation restraint surface 33, the rotational force of the attached terminal block 14 in the direction of the arrow R1 is canceled. In this way, since the rotational force generated in the attached terminal block 14 when the electric wire 28 connected to the spring terminal 16a is pulled out is canceled, the external force directed upward in the Z1 direction to the attached terminal block 14 can be suppressed.

また、図示しないが、スプリング端子１６ｃ，１６ｄ，１６ｅに接続した電線を引き抜く際にも、付属端子台１４にＺ１方向の上方に向う外力が発生するおそれがある。しかし、スプリング端子１６ｅに接続した電線を引き抜く際には、付属端子台１４に、第２の蟻穴１２及び第２の蟻ほぞ３１の嵌合部位を中心とした回転力が発生し、この付属端子台１４の回転方向に対して回路遮断器１の遮断器側回転拘束面１３が付属端子台１４の端子台側回転拘束面３３に対して回転反力を作用するので、付属端子台１４の回転力を打ち消すとともに、付属端子台１４がスライド規制部４０で抜け止めされているので、付属端子台１４に対するＺ１方向の上方に向う外力を抑制することができる。 Also, although not shown, there is a possibility that an external force directed upward in the Z1 direction may be applied to the accessory terminal block 14 when the wires connected to the spring terminals 16c, 16d, and 16e are pulled out. However, when the electric wire connected to the spring terminal 16e is pulled out, a rotational force is generated in the attached terminal block 14 around the fitting portion of the second dovetail hole 12 and the second dovetail tenon 31, and this attachment Since the circuit breaker side rotation restraint surface 13 of the circuit breaker 1 acts on the terminal block side rotation restraint surface 33 of the attached terminal block 14 with respect to the rotation direction of the terminal block 14, a rotational reaction force is applied to the attached terminal block 14. Since the rotational force is canceled and the attached terminal block 14 is prevented from coming off by the slide restricting portion 40, an external force directed upward in the Z1 direction to the attached terminal block 14 can be suppressed.

さらに、他のスプリング端子１６ｂに接続した電線を引き抜く際にも、付属端子台１４に発生する回転力に対して回路遮断器１の遮断器側回転拘束面１３が付属端子台１４の端子台側回転拘束面３３に対して回転反力を作用するので、付属端子台１４の回転力を打ち消すとともに、付属端子台１４に対するＺ１方向の上方に向う外力を抑制することができる。 Furthermore, when the electric wire connected to the other spring terminal 16b is pulled out, the circuit breaker-side rotation restraint surface 13 of the circuit breaker 1 resists the rotational force generated in the attached terminal block 14, and the terminal block side of the attached terminal block 14 is pulled out. Since a rotational reaction force acts on the rotation restricting surface 33, the rotational force of the attached terminal block 14 can be canceled, and an external force acting upward in the Z1 direction on the attached terminal block 14 can be suppressed.

したがって、付属端子台１４に設けたスプリング端子１６ａ～１６ｅの電線２８の抜き差し方向と、回路遮断器１の第１及び第２の蟻穴１１，１２及び付属端子台１４の第１及び第２の蟻ほぞ３０，３１の嵌合方向とが同一方向であっても、付属端子台１４の回転方向に対して直交する方向に回路遮断器１の遮断器側回転拘束面１３及び付属端子台１４の端子台側回転拘束面３３が面接触状態で配置されている、あるいはスライド規制部４０が付属端子用カバー９で抜け止めされていることで、付属端子台１４の回転力を打ち消して付属端子台１４に対するＺ１方向の上方に向う外力を抑制しているので、スプリング端子１６ａ～１６ｅから電線２８を引き抜く際に付属端子台１４が回路遮断器１から外れるのを防止し、回路遮断器１の付属端子用カバー９に強い力が当たることも防止することができる。 Therefore, the direction of insertion and removal of the electric wire 28 of the spring terminals 16a to 16e provided on the attached terminal block 14, the first and second dovetail holes 11 and 12 of the circuit breaker 1, and the first and second dovetail holes of the attached terminal block 14 Even if the fitting direction of the dovetail tenons 30 and 31 is the same direction, the circuit breaker side rotation restraining surface 13 of the circuit breaker 1 and the attached terminal block 14 are aligned in a direction orthogonal to the rotation direction of the attached terminal block 14. The terminal block side rotation restraining surface 33 is arranged in a surface contact state, or the slide restricting portion 40 is prevented from coming off by the attached terminal cover 9, thereby canceling the rotational force of the attached terminal block 14 and holding the attached terminal block. Since the external force directed upward in the Z1 direction to 14 is suppressed, the attached terminal block 14 is prevented from coming off the circuit breaker 1 when the electric wire 28 is pulled out from the spring terminals 16a to 16e. It is also possible to prevent the terminal cover 9 from being hit with a strong force.

［第２実施形態］
次に、図６及び図７を参照して第２実施形態の回路遮断器の付属端子台取付け構造を説明する。なお、図１から図５で示した第１実施形態と同一構成部分には、同一符号を付して説明は省略する。
本実施形態は、スライド規制部を付属装置の上面側に設けるとともに、回動規制部を付属装置の側面側に設けるようにしたものである。すなわち、図６に示すように、第１実施形態の付属端子台１４で示した第２の蟻ほぞ３１の上部に設けていた膨出部３２を削除するとともに、付属端子台１４の互いに直交するＸ２方向及びＺ２方向を含む側面１４ａの下部のＸ２方向に離間する位置に、Ｙ２方向に突出する一対のリブ３４，３５が形成されている。 [Second embodiment]
Next, the attached terminal block attachment structure of the circuit breaker of the second embodiment will be described with reference to FIGS. 6 and 7. FIG. In addition, the same reference numerals are assigned to the same components as those of the first embodiment shown in FIGS. 1 to 5, and the description thereof is omitted.
In this embodiment, the slide restricting portion is provided on the upper surface side of the accessory device, and the rotation restricting portion is provided on the side surface side of the accessory device. That is, as shown in FIG. 6, the bulging portion 32 provided on the upper portion of the second dovetail tenon 31 shown in the attached terminal block 14 of the first embodiment is removed, and the attached terminal blocks 14 are perpendicular to each other. A pair of ribs 34 and 35 projecting in the Y2 direction are formed at positions spaced apart in the X2 direction on the lower portion of the side surface 14a including the X2 direction and the Z2 direction.

この付属端子台１４を回路遮断器１に装着すると、一方のリブ３４の内側の面（端子台側回転拘束面）３４ａが、回路遮断器１の第１の蟻穴１１側のＸ１方向を向く遮断器側回転拘束面３６に面接触した状態で当接し、他方のリブ３５の内側の面（端子台側回転拘束面）３５ａが、回路遮断器１の第２の蟻穴１２側のＸ１方向を向く遮断器側回転拘束面３７に面接触した状態で当接する。 When this attached terminal block 14 is attached to the circuit breaker 1, the inner surface (terminal block side rotation restraining surface) 34a of one rib 34 faces the first dovetail hole 11 side of the circuit breaker 1 in the X1 direction. It abuts on the circuit breaker side rotation restricting surface 36 in a surface contact state, and the inner surface (terminal block side rotation restricting surface) 35a of the other rib 35 faces the second dovetail hole 12 side of the circuit breaker 1 in the X1 direction. is in surface contact with the circuit breaker side rotation restraint surface 37 facing .

そして、図７に示すように、回路遮断器１に装着した付属端子台１４のスプリング端子１６ｅに電線２８が接続されており、この電線２８をスプリング端子１６ｅから引き抜くと、付属端子台１４には、第２の蟻穴１２及び第２の蟻ほぞ３１の嵌合部位を中心とした回転力が発生する。
付属端子台１４が回転しようとすると、付属端子台１４の回転方向に対して直交して配置されている回路遮断器１の遮断器側回転拘束面３７が付属端子台１４のリブ３５の端子台側回転拘束面３５ａに対して回転反力を作用するので、付属端子台１４の回転力が打ち消される。このように、スプリング端子１６ｅに接続した電線２８を引き抜く際に付属端子台１４に発生する回転力が打ち消されることで、付属端子台１４に対するＺ１方向の上方に向う外力を抑制する。 As shown in FIG. 7, an electric wire 28 is connected to the spring terminal 16e of the attached terminal block 14 attached to the circuit breaker 1. When the electric wire 28 is pulled out from the spring terminal 16e, the attached terminal block 14 , a rotational force centering on the engagement portion of the second dovetail hole 12 and the second dovetail tenon 31 is generated.
When the attached terminal block 14 tries to rotate, the circuit breaker-side rotation restraining surface 37 of the circuit breaker 1 arranged perpendicular to the rotation direction of the attached terminal block 14 is pushed against the terminal block of the rib 35 of the attached terminal block 14. Since a rotational reaction force acts on the side rotation restricting surface 35a, the rotational force of the attached terminal block 14 is canceled. In this way, by canceling the rotational force generated in the attached terminal block 14 when the electric wire 28 connected to the spring terminal 16e is pulled out, the external force directed upward in the Z1 direction to the attached terminal block 14 is suppressed.

また、図示しないが、他のスプリング端子１６ａ～１６ｄに接続した電線を引き抜く際にも、付属端子台１４に発生する回転力に対して、遮断器側回転拘束面３６，３７が付属端子台１４のリブ３４，３５の端子台側回転拘束面３４ａ，３５ａに回転反力を作用することで付属端子台１４の回転力を打ち消し、付属端子台１４に対するＺ１方向の上方に向う外力を抑制する。
したがって、第２実施形態も、付属端子台１４の回転力を打ち消して付属端子台１４に対するＺ１方向の上方に向う外力を抑制しているので、スプリング端子１６ａ～１６ｅから電線２８を引き抜く際に付属端子台１４が回路遮断器１から外れるのを防止し、回路遮断器１の付属端子用カバー９に強い力が当たることも防止することができる。 Also, although not shown, when the wires connected to the other spring terminals 16a to 16d are pulled out, the circuit breaker-side rotation restraint surfaces 36 and 37 resist the rotational force generated in the attached terminal block 14. The rotational force of the attached terminal block 14 is canceled by acting a rotational reaction force on the terminal block side rotation restraining surfaces 34a and 35a of the ribs 34 and 35 of , and the external force directed upward in the Z1 direction to the attached terminal block 14 is suppressed.
Therefore, in the second embodiment as well, since the rotational force of the attached terminal block 14 is canceled and the external force acting upward in the Z1 direction on the attached terminal block 14 is suppressed, when the electric wire 28 is pulled out from the spring terminals 16a to 16e, the attached It is possible to prevent the terminal block 14 from coming off the circuit breaker 1 and to prevent the attachment terminal cover 9 of the circuit breaker 1 from being hit with a strong force.

なお、本実施形態では、回動規制部を付属装置の側面側に設けるようにしたが、回動規制部を付属装置の底面側に設けるようにしてもよい。
また、本発明の第１実施形態、第２実施形態では、規制部を付属装置側に設けるようにしたが、規制部を回路遮断器の本体ケース側に設けるようにしてもよい。さらに、規制部を複数のスライド規制部から形成するようにしてもよい。
なお、本実施形態では、スプリング端子１６を備えた付属端子台１４について説明したが、回路遮断器１の本体ケースの側面に装着されるケースと、ケースに設けたスプリング端子とを備えた電圧引外し装置や、回路遮断器１の本体ケースの側面に装着されるケースと、ケースに設けたスプリング端子を備えた不足電圧引外し装置に本発明を適用するようにしてもよい。 In this embodiment, the rotation restricting portion is provided on the side surface of the accessory device, but the rotation restricting portion may be provided on the bottom surface side of the accessory device.
Further, in the first and second embodiments of the present invention, the restricting portion is provided on the accessory device side, but the restricting portion may be provided on the body case side of the circuit breaker. Furthermore, the restricting portion may be formed from a plurality of slide restricting portions.
Although the attached terminal block 14 having the spring terminals 16 has been described in the present embodiment, a voltage puller having a case attached to the side surface of the body case of the circuit breaker 1 and a spring terminal provided on the case has been described. The present invention may be applied to a disconnecting device or an undervoltage tripping device having a case mounted on the side surface of the body case of the circuit breaker 1 and a spring terminal provided on the case.

１ 回路遮断器
１ａ 側面
１ｃ 蓋部
２ ケース
３ カバー
３ａ 開口部
４ 本体ケース
５ 開口部
６ 操作ハンドル
７ 電源側外部端子
８ 負荷側外部端子
９ 付属端子用カバー
１０ａ，１０ｂ 接続凹部
１１ 第１の蟻穴
１２ 第２の蟻穴
１３ 遮断器側回転拘束面
１４ 付属端子台
１４ａ 側面
１５ 端子台ケース
１５ａ 側面
１６ スプリング端子
１７ リード線
１８ 補助スイッチ
１９ リード線
２０ 警報スイッチ
２１ 端子部
２２ 端子カバー
２３ 端子板
２４ 板ばね
２５ 絶縁ブロック
２６ 電線挿入孔
２７ 工具挿入孔
２８ 電線
３０ 第１の蟻ほぞ
３１ 第２の蟻ほぞ
３２ 膨出部
３３ 端子台側回転拘束面
３４，３５ リブ
３４ａ，３５ａ リブの内側を向く面
４０ スライド規制部 1 Circuit breaker 1a Side surface 1c Lid 2 Case 3 Cover 3a Opening 4 Body case 5 Opening 6 Operation handle 7 Power supply side external terminal 8 Load side external terminal 9 Attached terminal covers 10a, 10b Connection recess 11 First dovetail Hole 12 Second dovetail hole 13 Circuit breaker side rotation restraint surface 14 Attached terminal block 14a Side surface 15 Terminal block case 15a Side surface 16 Spring terminal 17 Lead wire 18 Auxiliary switch 19 Lead wire 20 Alarm switch 21 Terminal part 22 Terminal cover 23 Terminal plate 24 Leaf spring 25 Insulation block 26 Wire insertion hole 27 Tool insertion hole 28 Wire 30 First dovetail tenon 31 Second dovetail tenon 32 Bulging portion 33 Terminal block side rotation restraining surfaces 34, 35 Ribs 34a, 35a Facing surface 40 Slide control part

Claims (6)

回路遮断器の本体ケースと、
電線を弾性保持するスプリング端子を備えた付属装置と、
前記本体ケースの側面と当該側面に向かい合う前記付属装置の側面とにスライド式の一対の係合部を設け、
前記本体ケースに前記付属装置を着脱自在に装着する回路遮断器において、
前記スプリング端子の電線引き抜き方向と前記係合部のスライド方向が同一方向であり、
前記付属装置または本体ケースの少なくとも一方に、前記本体ケースに対する前記付属装置の前記スライド方向の移動を規制する規制部を設けたことを特徴とする回路遮断器。 a body case of the circuit breaker;
an accessory device with a spring terminal that elastically holds the wire;
A pair of sliding engagement portions are provided on the side surface of the main body case and the side surface of the accessory device facing the side surface,
In a circuit breaker in which the accessory device is detachably attached to the main body case,
a direction in which the wire is pulled out of the spring terminal and a direction in which the engaging portion slides in the same direction;
A circuit breaker, wherein at least one of the accessory device and the main body case is provided with a restricting portion for restricting movement of the accessory device in the sliding direction with respect to the main body case. 前記規制部は、複数のスライド規制部からなることを特徴とする請求項１に記載の回路遮断器。 2. The circuit breaker according to claim 1, wherein said restricting portion comprises a plurality of slide restricting portions. 前記規制部は、スライド規制部と、当該スライド規制部を支点とする前記付属装置の回動を規制する回動規制部とからなることを特徴とする請求項１に記載の回路遮断器。 2. The circuit breaker according to claim 1, wherein the restricting portion comprises a slide restricting portion and a rotation restricting portion for restricting rotation of the accessory device about the slide restricting portion. 前記スライド規制部と前記回動規制部は、前記付属装置の上面側にそれぞれ設けられていることを特徴とする請求項３に記載の回路遮断器。 4. The circuit breaker according to claim 3, wherein said slide restricting portion and said rotation restricting portion are provided respectively on the upper surface side of said accessory device. 前記スライド規制部と前記回動規制部は、前記付属装置に設けられており、前記スライド規制部は付属装置の上面側に設けられ、前記回動規制部は、前記付属装置の側面側または底面側に設けられていることを特徴とする請求項３に記載の回路遮断器。 The slide regulating portion and the rotation regulating portion are provided on the accessory device, the slide regulating portion is provided on the upper surface side of the accessory device, and the rotation regulating portion is provided on the side surface side or the bottom surface of the accessory device. 4. The circuit breaker according to claim 3, wherein the circuit breaker is provided on the side. 前記付属装置は、回路遮断器に内装される内装付属品とリード線を介して接続される付属端子台であることを特徴とする請求項１～５のいずれかに記載の回路遮断器。 6. The circuit breaker according to any one of claims 1 to 5, wherein the accessory device is an accessory terminal block connected to an internal accessory installed in the circuit breaker via a lead wire.
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