WO2014091573A1 - Circuit breaker - Google Patents

Circuit breaker Download PDF

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Publication number
WO2014091573A1
WO2014091573A1 PCT/JP2012/082149 JP2012082149W WO2014091573A1 WO 2014091573 A1 WO2014091573 A1 WO 2014091573A1 JP 2012082149 W JP2012082149 W JP 2012082149W WO 2014091573 A1 WO2014091573 A1 WO 2014091573A1
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WO
WIPO (PCT)
Prior art keywords
circuit breaker
cover
auxiliary cover
auxiliary
main cover
Prior art date
Application number
PCT/JP2012/082149
Other languages
French (fr)
Japanese (ja)
Inventor
健一 仁科
雄介 瀧川
Original Assignee
三菱電機株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to PCT/JP2012/082149 priority Critical patent/WO2014091573A1/en
Priority to JP2014551782A priority patent/JP5840307B2/en
Priority to CN201280077687.8A priority patent/CN104871282B/en
Publication of WO2014091573A1 publication Critical patent/WO2014091573A1/en

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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
    • H01H71/02—Housings; Casings; Bases; Mountings
    • H01H71/0207—Mounting or assembling the different parts of the circuit breaker
    • 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
    • H01H2071/0242—Assembling parts of a circuit breaker by using snap mounting techniques
    • 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

Definitions

  • the present invention relates to a circuit breaker having a pocket portion for accommodating various accessory devices such as an alarm switch, an auxiliary switch, a test device, and a trip device, and in particular, an auxiliary cover that covers the pocket portion is used as a main cover.
  • the present invention relates to an improvement of a hinge part that is movably connected.
  • a conventional circuit breaker includes a base formed of a synthetic resin material and a main cover, and a pocket portion serving as a storage portion for an accessory device such as an alarm switch or an auxiliary switch is formed on the main cover. Furthermore, there is a handle for manually opening and closing the breaking mechanism housed in the circuit breaker case and a handle seat for projecting the handle out of the case so that the attachment device can be opened and closed when assembled in the pocket portion.
  • the auxiliary cover has a hinge structure that can be rotated by a bearing portion formed on the main cover and a pin formed on the auxiliary cover. Further, when the auxiliary cover is closed, the main cover is fastened with a fastening screw.
  • the insertion direction of the pin is the side or handle (center) so that it can easily enter without interference. Since there is no structure that is weak to the pressure in the direction from the handle to the side, and that does not cheat the auxiliary cover in the direction opposite to that pressure, when the auxiliary cover becomes the arc gas pressure receiver, the hinge In some cases, the structural pin could come off the bearing. For this reason, it is necessary to take measures against the pressure of the arc gas, such as increasing the number of mounting screws and increasing the thickness of the cover material.
  • the present invention has been made to solve such a problem, and in a circuit breaker in which a pocket accommodating an accessory device is covered with an auxiliary cover, the auxiliary cover is excellent in assemblability and has a short circuit current. Improves the hinge structure that connects the main cover and auxiliary cover so that the auxiliary cover will not be damaged or scattered even under high internal pressure due to arc generated between contacts when a large current flows It is.
  • a circuit breaker according to the present invention comprises a base and a main cover fixed to the base, and a breaker case for accommodating a breaking mechanism therein.
  • the circuit breaker is formed on a surface of the main cover opposite to the base.
  • a circuit breaker comprising a pocket part for accommodating an accessory device of the shut-off mechanism, and an auxiliary cover that is connected to the main cover via a hinge part provided at an edge of the pocket part and covers the pocket part
  • the hinge part protrudes from the main cover at a predetermined interval and has a plurality of bearing parts having elongated holes extending in a lateral direction from the handle of the circuit breaker inside, and a predetermined edge at the edge of the auxiliary cover.
  • a notch part that is recessed at a distance and inserts each bearing part when coupled to the bearing part; a pin that projects from a part of the notch part and extends in the same direction as the elongated hole; and the auxiliary cover It is characterized in that is composed of a thin-walled portion formed in a part.
  • the pin of the auxiliary cover to be inserted into the bearing portion of the main cover is formed so as to extend in the lateral direction from the handle (center) of the circuit breaker. Even when a high current such as current flows, the cover material is not thickened and the number of screws for the auxiliary cover is increased without increasing the thickness of the auxiliary cover, even when subjected to high pressure due to the arc gas generated between the contacts.
  • the present invention provides a circuit breaker capable of preventing breakage and scattering and improving the arc gas pressure resistance during interruption.
  • a circuit breaker 100 houses a breaker mechanism (not shown) therein, and includes a base 1a formed of a synthetic resin material and a main cover 1b detachably fixed to the base 1a.
  • a handle 3 that is formed of a synthetic resin as in the case of the breaker case 1 and operates the breaker mechanism from the outside, and a handle seat 4 provided on the main cover 1b for projecting the handle 3 to the outside of the breaker case 1 And a right pole auxiliary cover 2a and a left pole auxiliary cover 2b that are rotatably connected to the main cover 1b by a hinge portion 5.
  • pocket portions 6 for accommodating accessory devices are formed on both sides of the handle seat 4 located at the substantially central portion of the circuit breaker, respectively. Accessory devices such as auxiliary switches are stored.
  • the right pole auxiliary cover 2a and the left pole auxiliary cover 2b arranged in parallel with each other in the electric circuit direction (long side direction in FIG. 1) of the circuit breaker body are formed of synthetic resin, and the side direction ( The hinge portion 5 formed in the short side direction in FIG. 1 is rotated as a fulcrum to open and close the internal accessory device pocket portion 6.
  • both auxiliary covers 2 a and 2 b are notched in the end edges thereof with a predetermined distance from each other.
  • a thin portion 8c is formed at an end edge portion of the auxiliary cover 2b in the handle (center) direction.
  • the thin-walled portions 8a and 8b are provided so as to cover a part of the notches 10a and 10b formed in the auxiliary covers 2a and 2b, and are so thick as to bend upward with the insertion of the protrusions of the main cover 1b described later. That's it.
  • the thin-walled portion 8c is also thick enough to bend upward along with the right auxiliary cover 2a when the protrusion of the main cover 1b is inserted.
  • the auxiliary covers 2a and 2b are formed with an inner wall surface 9 that comes into contact with the side surface of the handle seat 4 when the auxiliary cover is closed.
  • the auxiliary covers 2a and 2b are detachably attached to the main cover 1b by a hinge structure 5.
  • FIG. 5 (a) shows an initial insertion state of the main cover 1b and the auxiliary cover 2b.
  • FIG. 5 (a) shows an initial insertion state of the main cover 1b and the auxiliary cover 2b.
  • bearing portions 11a and 11b as shown in FIG.
  • this bearing portion 11a, 11b has long holes 4a and 4b in the side surface direction (short side direction) of the circuit breaker main body, and the pins 7a and 7b are arranged opposite to each other on the same axis in the long holes 4a and 4b.
  • the bearing portions 11a and 11b are connected to the pins 7a and 7b of the cutout portions 10a and 10b of the auxiliary cover 2b.
  • the thin portions 8a, 8b, 8c formed at these positions are brought into contact with the top surfaces of the bearing portions 11a, 11b and the auxiliary cover 2a so as to be bent. Due to this bending, the pins 7a and 7b are opposed to the positions of the long holes 4a and 4b.
  • the hinge structure 5 is configured by being inserted into the holes 4a and 4b, and the bending of the thin portion 8 is returned to the original state and fitted as shown in FIG.
  • the auxiliary covers 2a and 2b are not normally removed, but when they are removed, the thin portions 8a, 8b and 8c are bent to ride on the bearing portions 11a and 11b and the top surface of the auxiliary cover 2a. Remove by sliding in the opposite direction of arrow A.
  • the hinge structure 5 configured as described above can slide the auxiliary covers 2a and 2b only within a range in which the pins 7a and 7b can move in the long holes 4a and 4b, and the pins 7a and 7b are long.
  • the pocket cover 6 can be closed by rotating the auxiliary cover with the holes 4a and 4b completely fitted, and then the auxiliary covers 2a and 2b can be fixed by the fastening screws 12.
  • FIG. 7 shows a front view of the circuit breaker according to the second embodiment.
  • the auxiliary cover 2b is formed integrally with the main cover 1b in the case where the left pole accessory device pocket 6 is not present. Only the right pole accessory device pocket 6 is covered with the auxiliary cover 2a.
  • FIG. 8 shows a front view of the circuit breaker according to the third embodiment, in which the configuration of FIG. 7 is reversed left and right, and the auxiliary cover 2b covers the left pole accessory device pocket. Since other configurations and operations are the same as those in the first and second embodiments, they are omitted.
  • long holes 4a and 4b are provided in bearing portions 11a and 11b that are provided so as to protrude from the main cover 1b at a predetermined interval, and the cutout portion of the auxiliary cover 2b is provided.
  • An example in which pins 7a and 7b are provided in a part of 10a and 10b so as to face the long hole is shown, but this is reversed, that is, the pins 7a and 7b are notched in the main cover 1b and the auxiliary cover 2b is notched.
  • the same hinge structure can be obtained even if the portions 10a and 10b are provided.
  • the auxiliary cover 2 when the auxiliary cover 2 is closed, the inner wall surface 9 of the auxiliary cover 2 and the handle seat 4 of the main cover 1b are in contact with each other over a wide area, and the handle seat 4 does not move even when pressure in the direction of arrow B is applied.
  • the auxiliary cover 2 can be held in a wide area. For this reason, even when a high current such as a short-circuit current flows, the cover material is thickened without increasing the number of tightening screws 12 of the auxiliary cover 2 even when a high pressure is generated by an arc generated between the contacts. Breakage and scattering of the auxiliary cover 2 can be prevented. And the rotation structure of the auxiliary
  • the auxiliary covers 2a and 2b are opened, the auxiliary covers 2a and 2b are not in contact with the inner wall surface of the handle seat 4 of the main cover 1b, and the thin portion 8 is bent.
  • the pin 7 can be freely slid in the lateral direction, and there is no obstacle when attaching and detaching, and it can be easily assembled.
  • 1 circuit breaker case 1a base, 1b main cover, 2a Auxiliary cover (right pole side), 2b Auxiliary cover (left pole side), 3 handle, 4 handle seat, 5 hinge structure, 6 Attached device pocket, 7 pin, 8 Thin part, 9 Auxiliary cover inner wall, 10 Notch, 11 Bearing, 12 Clamping screw, 100 Circuit breaker.

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  • Breakers (AREA)

Abstract

In this circuit breaker, which is provided with an auxiliary cover that is coupled to a main cover via a hinge provided at the edge of a pocket that contains an ancillary device for a breaker mechanism, said hinge comprises the following: a plurality of bearings that protrude from the main cover and contain elongated holes that extend in the direction of the short side of the circuit breaker; notches, cut into the edge of the auxiliary cover at prescribed intervals, into which the respective bearings are inserted; pins that are provided in some of said notches and extend in the same direction as the elongated holes; and a thin section that forms part of the auxiliary cover.

Description

回路遮断器Circuit breaker
　この発明は、警報スイッチや補助スイッチ、テスト装置、引きはずし装置などの各種付属装置を収容するポケット部を備えた回路遮断器に関するものであり、特に上記ポケット部を覆う補助カバーを主カバーに回動可能に連結する蝶番部の改良に関する。 The present invention relates to a circuit breaker having a pocket portion for accommodating various accessory devices such as an alarm switch, an auxiliary switch, a test device, and a trip device, and in particular, an auxiliary cover that covers the pocket portion is used as a main cover. The present invention relates to an improvement of a hinge part that is movably connected.
　従来の回路遮断器は合成樹脂材料で形成されたベースと主カバーとからなり、主カバーには警報スイッチあるいは補助スイッチ等の付属装置の収納部となるポケット部が形成されている。さらに、この遮断器ケースに収納された遮断機構を手動で開閉するためのハンドルおよびこのハンドルを上記ケース外に突出させるためのハンドル座があり、上記付属装置をポケット部に組込むときに開閉できるような補助カバーを備えており、上記補助カバーは上記主カバーに形成された軸受け部と、補助カバーに形成されたピンとにより、回動可能な蝶番構造になっている。また、補助カバーを閉める場合には締付けねじによって、主カバーと締結するような構造となっている。（特許文献1を参照） A conventional circuit breaker includes a base formed of a synthetic resin material and a main cover, and a pocket portion serving as a storage portion for an accessory device such as an alarm switch or an auxiliary switch is formed on the main cover. Furthermore, there is a handle for manually opening and closing the breaking mechanism housed in the circuit breaker case and a handle seat for projecting the handle out of the case so that the attachment device can be opened and closed when assembled in the pocket portion. The auxiliary cover has a hinge structure that can be rotated by a bearing portion formed on the main cover and a pin formed on the auxiliary cover. Further, when the auxiliary cover is closed, the main cover is fastened with a fastening screw. (See Patent Document 1)
特開平６－１２４６３８号JP-A-6-124638
　上述した従来の回路遮断器では、短絡電流のような大電流が流れると、周知のようにトリップ動作が行われ、接点間にアークが発生する。このアークによるガスが遮断器内部に充満すると、付属装置収納用のポケット部へも同時にアークガスにより発生した高い圧力が伝わり、このため補助カバーが破損し、付属装置が回路遮断器の外側へ飛び出すことがある。 In the conventional circuit breaker described above, when a large current such as a short circuit current flows, a trip operation is performed as is well known, and an arc is generated between the contacts. When this arc gas fills the circuit breaker, the high pressure generated by the arc gas is transmitted to the pocket for storing the accessory device at the same time, which breaks the auxiliary cover and causes the accessory device to jump out of the circuit breaker. There is.
即ち、従来の構造では主カバーと補助カバーを連結する蝶番構造が回路遮断器の補助カバーを主カバーに組み込むとき、干渉することなく容易に入るようにピンの挿入方向が側面かハンドル（中央）方向になっていたので、ハンドルから側面へ向かう方向の圧力に弱く、その圧力と反対方向に補助カバーを不正するような構造物もないため、補助カバーがアークガスの受圧体になったとき、蝶番構造のピンが軸受けから外れてしまうことがあった。このため、取付けねじの数の増加やカバー材の肉厚化といったアークガスの圧力に対する対策が必要であった。 That is, in the conventional structure, when the hinge structure that connects the main cover and the auxiliary cover is incorporated into the main cover of the circuit breaker, the insertion direction of the pin is the side or handle (center) so that it can easily enter without interference. Since there is no structure that is weak to the pressure in the direction from the handle to the side, and that does not cheat the auxiliary cover in the direction opposite to that pressure, when the auxiliary cover becomes the arc gas pressure receiver, the hinge In some cases, the structural pin could come off the bearing. For this reason, it is necessary to take measures against the pressure of the arc gas, such as increasing the number of mounting screws and increasing the thickness of the cover material.
　この発明は、かかる問題点を解決するためになされたものであり、付属装置を収納したポケットを補助カバーにより覆うようにした回路遮断器において、補助カバーの組立性に優れ、かつ短絡電流のような大電流が流れた場合の接点間に発生するアークによる高い内部圧力を受けても、補助カバーが破損・飛散することのないよう主カバーと補助カバーの連結部である蝶番構造を改良するものである。 The present invention has been made to solve such a problem, and in a circuit breaker in which a pocket accommodating an accessory device is covered with an auxiliary cover, the auxiliary cover is excellent in assemblability and has a short circuit current. Improves the hinge structure that connects the main cover and auxiliary cover so that the auxiliary cover will not be damaged or scattered even under high internal pressure due to arc generated between contacts when a large current flows It is.
　この発明に係る回路遮断器は、べースとこれに固定される主カバーとからなり内部に遮断機構を収納する遮断器ケース、前記主カバーの前記ベースとは反対側の面に形成されて前記遮断機構の付属装置を収容するポケット部、及び、前記ポケット部端縁に設けられた蝶番部を介して前記主カバーと連結され前記ポケット部を覆う補助カバーを備えた回路遮断器において、前記蝶番部は、前記主カバーから互いに所定の間隔を隔てて突設されて内部に遮断器のハンドルから側面方向に延びる長孔を有する複数個の軸受け部と、前記補助カバーの端縁に所定の間隔を隔てて凹設され前記軸受け部との結合に際してそれぞれの軸受け部を挿入する切欠き部と、前記切欠き部内の一部に突設され前記長孔と同一方向に延びるピンと、前記補助カバーの一部に形成された薄肉部とで構成されたことを特徴とするものである。 A circuit breaker according to the present invention comprises a base and a main cover fixed to the base, and a breaker case for accommodating a breaking mechanism therein. The circuit breaker is formed on a surface of the main cover opposite to the base. In a circuit breaker comprising a pocket part for accommodating an accessory device of the shut-off mechanism, and an auxiliary cover that is connected to the main cover via a hinge part provided at an edge of the pocket part and covers the pocket part, The hinge part protrudes from the main cover at a predetermined interval and has a plurality of bearing parts having elongated holes extending in a lateral direction from the handle of the circuit breaker inside, and a predetermined edge at the edge of the auxiliary cover. A notch part that is recessed at a distance and inserts each bearing part when coupled to the bearing part; a pin that projects from a part of the notch part and extends in the same direction as the elongated hole; and the auxiliary cover It is characterized in that is composed of a thin-walled portion formed in a part.
　本発明によれば、主カバーの軸受け部へ挿入する補助カバーのピンは遮断器のハンドル（中央）から側面方向へ延びるように形成されているため、補助カバーがスライド抜けし難くなり、側面短絡電流のような大電流が流れた場合に接点間に発生するアークガスによる高い圧力を受けても、カバー材を肉厚にしたり、補助カバーの締付ねじの数を増加することなく、補助カバーの破損・飛散を防ぎ、遮断時のアークガス耐圧性を向上することができる回路遮断器を提供するものである。 According to the present invention, the pin of the auxiliary cover to be inserted into the bearing portion of the main cover is formed so as to extend in the lateral direction from the handle (center) of the circuit breaker. Even when a high current such as current flows, the cover material is not thickened and the number of screws for the auxiliary cover is increased without increasing the thickness of the auxiliary cover, even when subjected to high pressure due to the arc gas generated between the contacts. The present invention provides a circuit breaker capable of preventing breakage and scattering and improving the arc gas pressure resistance during interruption.
本発明の一実施例になる回路遮断器を示す外観斜視図である。It is an external appearance perspective view which shows the circuit breaker which becomes one Example of this invention. 図１の回路遮断器の補助カバーの一つである左極用補助カバーを開いた状態を示す外観斜視図である。It is an external appearance perspective view which shows the state which opened the auxiliary cover for left poles which is one of the auxiliary covers of the circuit breaker of FIG. （a）は左極用補助カバーの正面図、(b)は(a)図の矢印Ｄ方向から見た図である。(A) is the front view of the auxiliary cover for left poles, (b) is the figure seen from the arrow D direction of (a) figure. 同じく左極用補助カバーの斜視図である。It is a perspective view of the auxiliary cover for left poles similarly. 本発明の一実施例になる回路遮断器の蝶番構造を示す断面図である。It is sectional drawing which shows the hinge structure of the circuit breaker which becomes one Example of this invention. 本発明の一実施例になる回路遮断器の正面図である。It is a front view of the circuit breaker which becomes one Example of this invention. 本発明の別の実施例を示す回路遮断器の正面図である。It is a front view of the circuit breaker which shows another Example of this invention. 本発明のさらに別の実施例を示す回路遮断器の正面図である。It is a front view of the circuit breaker which shows another Example of this invention.
実施の形態１．
　本発明の一実施例を示す図１～図６を用いて説明する。
　図１、図２を用いて先ずこの発明の対象とする回路遮断器について説明する。図において、回路遮断器１００は、図示しない遮断機構をその内部に収納し、合成樹脂材料で形成されたベース１ａおよびこのベース１ａに着脱自在に固定される主カバー１ｂとからなる遮断器ケース１と、上記遮断器ケース１と同じく合成樹脂で形成され、遮断機構を外部から操作するハンドル３と、このハンドル３を遮断器ケース１の外側に突出させるため主カバー１ｂに設けられたハンドル座４と、主カバー１ｂに蝶番部５で回動可能に連結された右極用補助カバー２ａ、および左極用補助カバー２ｂとから構成されている。 Embodiment 1 FIG.
An embodiment of the present invention will be described with reference to FIGS.
First, the circuit breaker which is the object of the present invention will be described with reference to FIGS. In the figure, a circuit breaker 100 houses a breaker mechanism (not shown) therein, and includes a base 1a formed of a synthetic resin material and a main cover 1b detachably fixed to the base 1a. And a handle 3 that is formed of a synthetic resin as in the case of the breaker case 1 and operates the breaker mechanism from the outside, and a handle seat 4 provided on the main cover 1b for projecting the handle 3 to the outside of the breaker case 1 And a right pole auxiliary cover 2a and a left pole auxiliary cover 2b that are rotatably connected to the main cover 1b by a hinge portion 5.
また、主カバー１ｂの表面には、回路遮断器の略中央部に位置するハンドル座４の両側に、付属装置収容のためのポケット部６がそれぞれ形成されており、これに図示しない警報スイッチや補助スイッチ等の付属装置が収納される。遮断器本体の電路方向（図１の長辺方向）に互いに並設された右極用補助カバー２ａおよび左極用補助カバー２ｂはそれぞれ合成樹脂で形成されており、遮断器本体の側面方向（図１の短辺方向）に形成された蝶番部５を支点として回動し内部の付属装置用ポケット部６を開放ならびに閉塞する。 Also, on the surface of the main cover 1b, pocket portions 6 for accommodating accessory devices are formed on both sides of the handle seat 4 located at the substantially central portion of the circuit breaker, respectively. Accessory devices such as auxiliary switches are stored. The right pole auxiliary cover 2a and the left pole auxiliary cover 2b arranged in parallel with each other in the electric circuit direction (long side direction in FIG. 1) of the circuit breaker body are formed of synthetic resin, and the side direction ( The hinge portion 5 formed in the short side direction in FIG. 1 is rotated as a fulcrum to open and close the internal accessory device pocket portion 6.
　図３、図４に示すように、両補助カバー２ａ、２ｂ(図では左極用補助カバー２ｂのみ示している)は、その端縁部に互いに所定の間隔を隔てて凹設された切欠き１０a、１０bを設け、この切欠き１０a、１０bの内面に遮断器本体の側面方向（短辺方向）に突出したピン７a、７bを有し、更に、上記補助カバー２ａ、２ｂの切欠き１０a、１０bの一部に薄肉部８a、８bが形成されている。また、補助カバー２ｂのハンドル（中央）方向の端縁部には薄肉部８ｃが形成されている。上記薄肉部８a、８bは両補助カバー２ａ、２ｂに形成された切欠き１０a、１０bの一部を覆うように設けられ後述する主カバー１ｂの突起部の挿入に伴って上方へ撓むような厚さのものである。同様に薄肉部８ｃも主カバー１ｂの突起部の挿入時に右側補助カバー２ａに伴って上方へ撓むような厚さとなっている。また、上記補助カバー２ａ、２ｂには、図４から見られるように、補助カバーが閉じられた際、ハンドル座４の側面に当接する内壁面９が形成されている。この補助カバー２ａ、２ｂは主カバー１ｂに蝶番構造５により着脱自在に取付けられている。 As shown in FIGS. 3 and 4, both auxiliary covers 2 a and 2 b (only the left pole auxiliary cover 2 b is shown in the figure) are notched in the end edges thereof with a predetermined distance from each other. 10a and 10b, pins 7a and 7b projecting in the lateral direction (short side direction) of the circuit breaker body on the inner surfaces of the notches 10a and 10b, and further, the notches 10a of the auxiliary covers 2a and 2b, Thin portions 8a and 8b are formed in a part of 10b. Further, a thin portion 8c is formed at an end edge portion of the auxiliary cover 2b in the handle (center) direction. The thin- walled portions 8a and 8b are provided so as to cover a part of the notches 10a and 10b formed in the auxiliary covers 2a and 2b, and are so thick as to bend upward with the insertion of the protrusions of the main cover 1b described later. That's it. Similarly, the thin-walled portion 8c is also thick enough to bend upward along with the right auxiliary cover 2a when the protrusion of the main cover 1b is inserted. Further, as can be seen from FIG. 4, the auxiliary covers 2a and 2b are formed with an inner wall surface 9 that comes into contact with the side surface of the handle seat 4 when the auxiliary cover is closed. The auxiliary covers 2a and 2b are detachably attached to the main cover 1b by a hinge structure 5.
　両補助カバー２ａ、２ｂの蝶番構造５による取付けの詳細を図５により説明する。図５（a）、(b)は図１のｃ－ｃ線断面を部分的に示しており、図５(a)は主カバー１bと補助カバー２ｂとの初期挿入状態を、図５(b)はその状態から補助カバー２ｂをＡ方向（図の左方向）にスライドさせ、そのピン７a、７bが軸受け部１１a、１１bの長孔４a、４ｂ内に完全に嵌合した状態を夫々示している。　すなわち、主カバー１ｂの負荷側端部側の端縁には、図５(a)　に示すような軸受け部１１a、１１bが所定の間隔dを隔てて突設されており、この軸受け部１１a、１１bは内部に遮断器本体の側面方向（短辺方向）に長孔４ａ、４bを有しており、この長孔４ａ、４bに上記ピン７a、７bが同一軸上に対向配置されている。 Details of the attachment of the auxiliary covers 2a and 2b by the hinge structure 5 will be described with reference to FIG. 5 (a) and 5 (b) partially show a cross section taken along the line cc of FIG. 1. FIG. 5 (a) shows an initial insertion state of the main cover 1b and the auxiliary cover 2b. ) Shows the state in which the auxiliary cover 2b is slid in the A direction (left direction in the figure) from that state, and the pins 7a and 7b are completely fitted in the long holes 4a and 4b of the bearing portions 11a and 11b, respectively. Yes. That is, bearing portions 11a and 11b as shown in FIG. 5 (a) are projected at a predetermined interval d from the end of the main cover 1b on the load side end portion side, and this bearing portion 11a, 11b has long holes 4a and 4b in the side surface direction (short side direction) of the circuit breaker main body, and the pins 7a and 7b are arranged opposite to each other on the same axis in the long holes 4a and 4b.
嵌合方法は、補助カバー２ｂを主カバー１ｂの軸受け部１１a、１１ｂに結合するに際して、先ず、上記軸受け部１１a、１１ｂが上記補助カバー２ｂの切欠き部１０a、１０ｂのうちピン７a、７bが存在しない位置に挿入されるようにし、この位置に形成された薄肉部８a、８ｂ、８ｃを軸受け部１１a、１１ｂ、及び補助カバー２ａの頂面に当接させて撓ませる。この撓みによりピン７a、７bが長孔４ａ、４ｂの位置に対向するようになり、その状態で補助カバー２ｂを遮断器の横方向、矢印Ａ方向にスライドさせれば、ピン７a、７bが長孔４ａ、４ｂに嵌入し、薄肉部８の撓みはもとに戻って図５(b)　のように嵌められて蝶番構造５が構成される。 When the auxiliary cover 2b is coupled to the bearing portions 11a and 11b of the main cover 1b, first, the bearing portions 11a and 11b are connected to the pins 7a and 7b of the cutout portions 10a and 10b of the auxiliary cover 2b. The thin portions 8a, 8b, 8c formed at these positions are brought into contact with the top surfaces of the bearing portions 11a, 11b and the auxiliary cover 2a so as to be bent. Due to this bending, the pins 7a and 7b are opposed to the positions of the long holes 4a and 4b. If the auxiliary cover 2b is slid in the lateral direction of the circuit breaker and in the direction of the arrow A in this state, the pins 7a and 7b The hinge structure 5 is configured by being inserted into the holes 4a and 4b, and the bending of the thin portion 8 is returned to the original state and fitted as shown in FIG.
この補助カバー２ａ、２ｂは通常取り外すことはないが、取外しする場合には、薄肉部８a、８ｂ、８ｃを撓ませて、軸受け部１１a、１１ｂ、及び補助カバー２ａの頂面に乗り上げさせ、さらに矢印Ａと反対方向へスライドさせることにより取外す。このように構成された蝶番構造５は、長孔４ａ、４ｂの中でピン７a、７bが動くことができる範囲だけ、補助カバー２ａ、２ｂを摺動させることができ、ピン７a、７bが長孔４ａ、４ｂに完全に嵌入した状態で上記補助カバーを回動してポケット部６を閉塞することができ、その後、締付けねじ１２によって補助カバー２ａ、２ｂを固定できるようになる。 The auxiliary covers 2a and 2b are not normally removed, but when they are removed, the thin portions 8a, 8b and 8c are bent to ride on the bearing portions 11a and 11b and the top surface of the auxiliary cover 2a. Remove by sliding in the opposite direction of arrow A. The hinge structure 5 configured as described above can slide the auxiliary covers 2a and 2b only within a range in which the pins 7a and 7b can move in the long holes 4a and 4b, and the pins 7a and 7b are long. The pocket cover 6 can be closed by rotating the auxiliary cover with the holes 4a and 4b completely fitted, and then the auxiliary covers 2a and 2b can be fixed by the fastening screws 12.
実施の形態２．
　上記の例では、図６の正面図のように左右対称形状である補助カバ－２ａ、２ｂによって、両極の付属装置用ポケット部６を覆うように構成されているが、以下のような構成でも本発明の効果は得られる。図７は実施の形態２による回路遮断器の正面図を示しており、この例では左極の付属装置用ポケット６が存在しない場合で、補助カバー２bが主カバー１ｂと一体となって形成され、右極用付属装置用ポケット部６のみ補助カバー２aによって覆うような構成となっている。 Embodiment 2. FIG.
In the above example, the auxiliary covers 2a and 2b that are bilaterally symmetric as shown in the front view of FIG. 6 are configured to cover the pockets 6 for accessory devices of both poles. The effect of the present invention can be obtained. FIG. 7 shows a front view of the circuit breaker according to the second embodiment. In this example, the auxiliary cover 2b is formed integrally with the main cover 1b in the case where the left pole accessory device pocket 6 is not present. Only the right pole accessory device pocket 6 is covered with the auxiliary cover 2a.
実施の形態３．
また、図８は実施の形態３による回路遮断器の正面図を示しており、図７の構成を左右反対にしたもので、補助カバー２ｂによって左極の付属装置用ポケットを覆う構成としたものであり、その他の構成および作用は実施の形態１および２と同じであるので省略する。 Embodiment 3 FIG.
FIG. 8 shows a front view of the circuit breaker according to the third embodiment, in which the configuration of FIG. 7 is reversed left and right, and the auxiliary cover 2b covers the left pole accessory device pocket. Since other configurations and operations are the same as those in the first and second embodiments, they are omitted.
上記実施の形態は一部に過ぎず、この他、この発明の範囲内で種々の変形例が考えられる。例えば、実施の形態１の蝶番構造５において、主カバー１ｂから互いに所定の間隔を隔てて突設される軸受け部１１a、１１bの内部に長孔４a、４ｂを設け、補助カバー２ｂの切欠き部１０a、１０ｂの一部にピン７a、７bを上記長孔に対向して設けた例を示したが、これを逆の関係、すなわち主カバー１ｂにピン７a、７bを、補助カバー２ｂに切欠き部１０a、１０ｂを設けても同一の蝶番構造が得られることはいうまでもない。 The above embodiment is only a part, and various modifications can be considered within the scope of the present invention. For example, in the hinge structure 5 of the first embodiment, long holes 4a and 4b are provided in bearing portions 11a and 11b that are provided so as to protrude from the main cover 1b at a predetermined interval, and the cutout portion of the auxiliary cover 2b is provided. An example in which pins 7a and 7b are provided in a part of 10a and 10b so as to face the long hole is shown, but this is reversed, that is, the pins 7a and 7b are notched in the main cover 1b and the auxiliary cover 2b is notched. Needless to say, the same hinge structure can be obtained even if the portions 10a and 10b are provided.
　上記各実施の形態のように構成された回路遮断器では、短絡電流のような大電流が流れたとき、接点（図示せず）間が反撥開離することによって接点間にアークが発生する。このアークは周囲の気体を急激に膨張させ、アークガスとなって遮断器内部に充満する。このアークガスの一部は排出孔（図示せず）から噴出されるが、完全には噴出されず付属装置用ポケット６を介して補助カバー２ａ、２ｂへ圧力が伝わり、補助カバー２ａ、２ｂのピン７を押し上げる作用力になる。この押し上げる作用力は蝶番構造５および締付けねじ１２によって主カバー１ｂへ補助カバー２が強固に固定されているため、モーメントが変化し図６の矢印Ｂの方向への圧力となる。矢印Ｂは遮断器内面方向への圧力である。 In the circuit breaker configured as in each of the above embodiments, when a large current such as a short-circuit current flows, an arc is generated between the contacts by repulsive separation between the contacts (not shown). . This arc rapidly expands the surrounding gas and becomes arc gas to fill the circuit breaker. A part of the arc gas is ejected from a discharge hole (not shown), but is not completely ejected, and pressure is transmitted to the auxiliary covers 2a and 2b via the accessory device pocket 6 to pin the auxiliary covers 2a and 2b. This is the force that pushes 7 up. This pushing-up force is such that the moment is changed and the pressure is changed to the direction of arrow B in FIG. 6 because the auxiliary cover 2 is firmly fixed to the main cover 1b by the hinge structure 5 and the fastening screw 12. Arrow B is the pressure toward the breaker inner surface.
　しかし、補助カバー２が閉じられた状態では、補助カバー２の内壁面９と主カバー１ｂのハンドル座４が広い面積で当接しており、矢印Ｂ方向の圧力が掛かったとしてもハンドル座４が広い面積で補助カバー２を保持できる。そのため、短絡電流のような大電流が流れた場合に接点間に発生するアークによる高い圧力を受けても、カバー材を厚肉化、補助カバー２の締付けねじ１２の数を増加することなく、補助カバー２の破損、飛散を防ぐことができる。そして、アークガスによる圧力上昇の高くなる遮断容量の高い回路遮断器に適用可能な補助カバーの回動構造を得ることができる。 However, when the auxiliary cover 2 is closed, the inner wall surface 9 of the auxiliary cover 2 and the handle seat 4 of the main cover 1b are in contact with each other over a wide area, and the handle seat 4 does not move even when pressure in the direction of arrow B is applied. The auxiliary cover 2 can be held in a wide area. For this reason, even when a high current such as a short-circuit current flows, the cover material is thickened without increasing the number of tightening screws 12 of the auxiliary cover 2 even when a high pressure is generated by an arc generated between the contacts. Breakage and scattering of the auxiliary cover 2 can be prevented. And the rotation structure of the auxiliary | assistant cover applicable to a circuit breaker with a high interruption | blocking capacity | capacitance where the pressure rise by arc gas becomes high can be obtained.
　また、図２に示すように、補助カバー２ａ、２ｂが開いた状態では、主カバー１ｂのハンドル座４における内壁面に当接しておらず、薄肉部８を撓ませることで補助カバー２ａ、２ｂのピン７を横方向へ自由にスライドすることができ、取り付け取り外し時に障害はなく、容易に組立可能である。
As shown in FIG. 2, when the auxiliary covers 2a and 2b are opened, the auxiliary covers 2a and 2b are not in contact with the inner wall surface of the handle seat 4 of the main cover 1b, and the thin portion 8 is bent. The pin 7 can be freely slid in the lateral direction, and there is no obstacle when attaching and detaching, and it can be easily assembled.
１　遮断器ケース、　１ａ　ベース、　１ｂ　主カバー、
２ａ　補助カバー（右極側）、　２ｂ　補助カバー（左極側）、
３　ハンドル、　４　ハンドル座、　５　蝶番構造、
６　付属装置用ポケット部、　７　ピン、　８　薄肉部、
９　補助カバー内壁面、　１０　切欠き部、　１１　軸受け部、
１２　締付けねじ、　１００　　回路遮断器。 1 circuit breaker case, 1a base, 1b main cover,
2a Auxiliary cover (right pole side), 2b Auxiliary cover (left pole side),
3 handle, 4 handle seat, 5 hinge structure,
6 Attached device pocket, 7 pin, 8 Thin part,
9 Auxiliary cover inner wall, 10 Notch, 11 Bearing,
12 Clamping screw, 100 Circuit breaker.

Claims (4)

  1. べースとこれに固定される主カバーとからなり内部に遮断機構を収納する遮断器ケース、前記主カバーの前記ベースとは反対側の面に形成されて前記遮断機構の付属装置を収容するポケット部、及び、前記ポケット部の端縁に設けられた蝶番部を介して前記主カバーと連結され前記ポケット部を覆う補助カバーを備えた回路遮断器において、前記蝶番部は、前記主カバーから互いに所定の間隔を隔てて突設された複数個の軸受け部と、前記補助カバーの端縁に所定の間隔を隔てて凹設され前記軸受け部を挿入する切欠き部と、前記切欠き部あるいは軸受け部のいずれか一方に突設され遮断器のハンドルから側面方向に延びるピンと、前記切欠き部あるいは軸受け部のいずれか他方の前記ピンと同一軸上に形成され前記補助カバーの側面方向への移動により上記ピンと嵌合する長孔と、前記補助カバーから前記切欠き部への軸受け部挿入部分に延在する薄肉部とで構成されたことを特徴とする回路遮断器。 A circuit breaker case that includes a base and a main cover fixed to the base, and accommodates a breaker mechanism therein, and is formed on a surface of the main cover opposite to the base to accommodate an accessory device of the breaker mechanism. A circuit breaker including a pocket portion and an auxiliary cover that is connected to the main cover via a hinge portion provided at an edge of the pocket portion and covers the pocket portion, wherein the hinge portion is separated from the main cover. A plurality of bearing portions projecting from each other at a predetermined interval; a notch portion recessed from the end edge of the auxiliary cover at a predetermined interval and inserting the bearing portion; and the notch portion or A pin protruding from one of the bearings and extending in the lateral direction from the handle of the circuit breaker, and formed in the same axis as the other pin of the notch or bearing and extending in the lateral direction of the auxiliary cover A long hole for the pin and the fitting by moving the circuit breaker, characterized in that it is composed of a thin portion extending from the auxiliary cover to the bearing portion insertion portion into the notch parts.
  2. 前記補助カバーへの軸受け部挿入に際し、前記軸受け部頂面で前記薄肉部を外方に撓ませることにより前記ピンと長孔との嵌合を可能とせしめたことを特徴とする請求項１に記載の回路遮断器。 2. The insertion of the bearing portion into the auxiliary cover allows the fitting of the pin and the long hole by allowing the thin portion to bend outward at the top surface of the bearing portion. Circuit breaker.
  3. 前記補助カバーは右極用および左極用、あるいはその一方のみから構成したことを特徴とする請求項１あるいは２に記載の回路遮断器。 3. The circuit breaker according to claim 1, wherein the auxiliary cover is configured for the right pole and the left pole, or only one of them.
  4. 前記補助カバーを閉じ、主カバーの付属装置用ポケットを覆った状態では、ハンドルを覆うハンドル座と補助カバー部の内壁面とが前記内壁面全体で当接していることを特徴とする請求項１～３のいずれか１項に記載の回路遮断器。 2. The handle seat for covering the handle and the inner wall surface of the auxiliary cover portion are in contact with the entire inner wall surface when the auxiliary cover is closed and the accessory device pocket of the main cover is covered. 4. The circuit breaker according to any one of items 1 to 3.
PCT/JP2012/082149 2012-12-12 2012-12-12 Circuit breaker WO2014091573A1 (en)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06124638A (en) * 1992-10-14 1994-05-06 Mitsubishi Electric Corp Circuit breaker
JP3073058U (en) * 2000-05-09 2000-11-14 船井電機株式会社 Door mounting structure and recording medium reproducing apparatus using the same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4395022B2 (en) * 2004-07-13 2010-01-06 三菱電機株式会社 Circuit breaker
JP2010251035A (en) * 2009-04-14 2010-11-04 Fuji Electric Fa Components & Systems Co Ltd Circuit breaker

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06124638A (en) * 1992-10-14 1994-05-06 Mitsubishi Electric Corp Circuit breaker
JP3073058U (en) * 2000-05-09 2000-11-14 船井電機株式会社 Door mounting structure and recording medium reproducing apparatus using the same

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CN104871282A (en) 2015-08-26
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