JP4724203B2 - Distribution board - Google Patents

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JP4724203B2
JP4724203B2 JP2008138645A JP2008138645A JP4724203B2 JP 4724203 B2 JP4724203 B2 JP 4724203B2 JP 2008138645 A JP2008138645 A JP 2008138645A JP 2008138645 A JP2008138645 A JP 2008138645A JP 4724203 B2 JP4724203 B2 JP 4724203B2
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bar
conductive
connection
conductive bar
breaker
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JP2009290946A (en
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篤志 中本
智志 南平
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Panasonic Electric Works Co Ltd
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Description

本発明は、分電盤に関するものである。   The present invention relates to a distribution board.

従来より、この種の分電盤としては、図５に示すような盤本体１内部に主幹ブレーカ２と、接続バー３０と、導電バー４と、分岐ブレーカ５とを備えたものが提供されている（例えば、特許文献１参照）。以下、図４における上下左右を基準とする。   Conventionally, as this type of distribution board, a board having a main breaker 2, a connection bar 30, a conductive bar 4, and a branch breaker 5 in a board body 1 as shown in FIG. 5 has been provided. (For example, refer to Patent Document 1). Hereinafter, the top, bottom, left and right in FIG.

まず、盤本体１は、筐体１１と図示しない蓋部とから構成され、筐体１１は矩形の底板１１ａの周縁から周壁１１ｂが略垂直に突出して一面を開口した略矩形箱状に形成され、筐体１１の開口部にはヒンジ構造を有する蓋部が覆設され開閉可能となっている。また、底板１１ａの４隅には、スペーサ６が固定されており、スペーサ６を介して筐体１１の長手方向に長尺状に形成された一対のブラケット７が配設されている。さらに、一対のブラケット７には、前後方向に複数のねじ穴７ａが設けられており、一対のブラケット７間に中板１８、１９、１０がそれぞれ所定の間隔を空けて上から順に架設され、ねじ穴７ａにねじ留めによって固定されている。   First, the panel body 1 is composed of a housing 11 and a lid (not shown), and the housing 11 is formed in a substantially rectangular box shape with a peripheral wall 11b projecting substantially vertically from the periphery of a rectangular bottom plate 11a and opening one surface. The lid of the housing 11 is covered with a cover having a hinge structure so that it can be opened and closed. In addition, spacers 6 are fixed to the four corners of the bottom plate 11a, and a pair of brackets 7 formed in a long shape in the longitudinal direction of the housing 11 are disposed via the spacers 6. Furthermore, the pair of brackets 7 are provided with a plurality of screw holes 7a in the front-rear direction, and the intermediate plates 18, 19, 10 are installed between the pair of brackets 7 in order from the top with a predetermined interval between them. It is fixed to the screw hole 7a by screwing.

次に、主幹ブレーカ２は、前面に操作部であるハンドル部２ｃを突出し、後面を中板１８、１９に対向させてねじ留めにより中板１８、１９に固定され、３極の２次端子２ｂには接続バー３０の一端が各々接続される。   Next, the main breaker 2 projects a handle portion 2c, which is an operation portion, on the front surface, and is fixed to the middle plates 18 and 19 by screwing with the rear surface facing the middle plates 18 and 19, and the secondary terminal 2b having three poles. One end of each connection bar 30 is connected to each other.

３つの導電バー４は、長手方向に沿って６つの略矩形状の通気孔４ａが穿設された長尺板状に形成される。そして、導電バー４の一端に設けられた樹脂等の非導電性材料から形成された支持部材１４及び、導電バー４の他端に設けられた樹脂等の導電性材料から形成された一対の支持台１５により、互いに厚み方向に沿って隙間を介して対向して配設され、長手方向を筐体１１の長手方向に向けて中板１０の略中央に配置される。また、接続バー３０の他端と導電バー４の一端が、支持部材１４でねじ１６によりそれぞれ共締めされることで接続され、各導電バー４は、主幹ブレーカ２の２次端子２ｂに電気的に接続される。   The three conductive bars 4 are formed in a long plate shape in which six substantially rectangular vent holes 4a are formed along the longitudinal direction. Then, a support member 14 formed from a non-conductive material such as a resin provided at one end of the conductive bar 4 and a pair of supports formed from a conductive material such as a resin provided at the other end of the conductive bar 4 The bases 15 are arranged to face each other with a gap along the thickness direction, and are arranged at the approximate center of the intermediate plate 10 with the longitudinal direction facing the longitudinal direction of the housing 11. In addition, the other end of the connection bar 30 and one end of the conductive bar 4 are connected to each other by being fastened together with screws 16 by the support member 14, and each conductive bar 4 is electrically connected to the secondary terminal 2 b of the main breaker 2. Connected to.

また、導電バー４の長手方向に沿った各側縁には、分岐ブレーカ５が１２個ずつ長手方向に沿って配設される。分岐ブレーカ５は、前面に操作部であるハンドル部５ｄを突出し、後面を中板１０に対向させて、図示しない２極の端子部が導電バー４にプラグイン接続された後、中板１０に固定される。   Further, twelve branch breakers 5 are arranged along the longitudinal direction at each side edge along the longitudinal direction of the conductive bar 4. The branch breaker 5 has a handle portion 5d as an operation portion protruding from the front surface, the rear surface is opposed to the intermediate plate 10, and a two-pole terminal portion (not shown) is connected to the conductive bar 4 by plug-in connection. Fixed.

また、一対のブラケット７の内、右側のブラケット７の上下両端近傍にはヒンジ部材２０がそれぞれ設けられ、左側のブラケット７の上下両端近傍には受け部材２１が設けられ、図示しない中蓋が、ヒンジ部材２０によって開閉可能な状態で設けられる。ここで、中蓋には、所定の位置に複数の逃がし穴が穿設されているため、中蓋が閉じられている際にも、主幹ブレーカ２のハンドル部２ｃ及び、分岐ブレーカ５のハンドル部５ｄが中蓋の逃がし穴から突出し、ハンドル操作が可能となっている。
特開２００６−００６０６４号公報 Further, of the pair of brackets 7, hinge members 20 are provided in the vicinity of the upper and lower ends of the right bracket 7, and receiving members 21 are provided in the vicinity of the upper and lower ends of the left bracket 7. The hinge member 20 can be opened and closed. Here, since a plurality of escape holes are formed at predetermined positions in the inner lid, even when the inner lid is closed, the handle portion 2c of the main breaker 2 and the handle portion of the branch breaker 5 are provided. 5d protrudes from the escape hole of the inner lid, and the handle can be operated.
JP 2006-006064 A

近年、分電盤の小型大容量化が進み、分電盤に設けられた主幹ブレーカ２から接続バー３０に流れる電流値が増大したことで、接続バー３０の発熱が大きくなり、導電バー４が接続バー３に接続される導電バー４の主幹ブレーカ側（上端側）周辺が高温となり、更に主幹ブレーカ２から発生した熱が導電バー４側へ伝達することで、導電バー４の主幹ブレーカ２側周辺の温度が更に上昇し、導電バー４の主幹ブレーカ２側に接続されている分岐ブレーカ５が誤作動を起こす恐れがある。   In recent years, the distribution board has been reduced in size and capacity, and the value of current flowing from the main breaker 2 provided in the distribution board to the connection bar 30 has increased. The vicinity of the main breaker side (upper end side) of the conductive bar 4 connected to the connection bar 3 becomes high temperature, and the heat generated from the main breaker 2 is transferred to the conductive bar 4 side, so that the main breaker 2 side of the conductive bar 4 The ambient temperature further increases, and the branch breaker 5 connected to the main breaker 2 side of the conductive bar 4 may malfunction.

本発明は、上記事由に鑑みてなされたものであり、その目的は、導電バーの主幹ブレーカ側周辺の温度上昇を抑制し、導電バーの主幹ブレーカ側に接続された分岐ブレーカの誤作動を防止した分電盤を提供することにある。   The present invention has been made in view of the above-mentioned reasons, and its purpose is to suppress a temperature rise around the main breaker side of the conductive bar and prevent malfunction of the branch breaker connected to the main breaker side of the conductive bar. Is to provide a distribution board.

請求項１の発明は、主幹ブレーカと、主幹ブレーカの負荷側端子に一端が各々接続される複数の接続バーと、前記接続バーの他端と各々接続され、互いに厚み方向に沿って対向して配設される長尺状の複数の導電バーと、前記導電バーの長手方向に並設されて、導電バーに各々接続される複数の分岐ブレーカとを中空箱状の筐体内に備え、前記接続バーの他端が、主幹ブレーカから最も離れた導電バーの端部と接続されることを特徴とする。   The invention according to claim 1 is the main circuit breaker, the plurality of connection bars each having one end connected to the load side terminal of the main circuit breaker, and the other end of each of the connection bars, and facing each other in the thickness direction. A plurality of long conductive bars arranged in the longitudinal direction of the conductive bars and a plurality of branch breakers connected to the conductive bars, respectively, are provided in a hollow box-shaped housing, and the connection The other end of the bar is connected to the end of the conductive bar farthest from the main breaker.

この発明によれば、接続バーと導電バーとが、主幹ブレーカから最も離れた導電バーの端部で接続され、接続バーから導電バーへ流れた電流は主幹ブレーカ側に進むに従って分流されるので、導電バーの温度上昇は、主幹ブレーカに近くなるにつれて小さくなる。従って、主幹ブレーカで発生した熱気が導電バー側へ伝達しても、導電バーの主幹ブレーカ側周辺の温度上昇を抑制することができ、導電バーの主幹ブレーカ側に接続された分岐ブレーカの誤作動を防止できる。   According to the present invention, the connection bar and the conductive bar are connected at the end of the conductive bar farthest from the main breaker, and the current flowing from the connection bar to the conductive bar is shunted as it proceeds to the main breaker side. The temperature rise of the conductive bar decreases as it approaches the main breaker. Therefore, even if hot air generated in the main breaker is transmitted to the conductive bar side, the temperature rise around the main breaker side of the conductive bar can be suppressed, and the branch breaker connected to the main breaker side of the conductive bar can malfunction. Can be prevented.

請求項２の発明は、請求項１の発明において、前記接続バーは、前面に操作ハンドルが設けられる前記分岐ブレーカの後面と対向して配設されることを特徴とする。   According to a second aspect of the present invention, in the first aspect of the invention, the connection bar is disposed to face a rear surface of the branch breaker provided with an operation handle on a front surface.

この発明によれば、接続バーが筐体の側壁近傍等に配設される場合と比べて、分岐ブレーカの後面に対抗して配設された方が、接続バーの全長を短くすることができ、接続バーからの発熱が抑えられ、更に接続バーを配設するために分電盤のサイズを大きくする必要がない。   According to the present invention, the total length of the connection bar can be shortened when the connection bar is disposed against the rear surface of the branch breaker as compared with the case where the connection bar is disposed near the side wall of the housing. The heat generation from the connection bar is suppressed, and it is not necessary to increase the size of the distribution board in order to dispose the connection bar.

以上説明したように、本発明では、導電バーの主幹ブレーカ側周辺の温度上昇を抑制し、導電バーの主幹ブレーカ側に接続された分岐ブレーカの誤作動を防止できるという効果がある。   As described above, the present invention has an effect of suppressing the temperature rise around the main breaker side of the conductive bar and preventing the malfunction of the branch breaker connected to the main breaker side of the conductive bar.

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

（実施形態）
本実施形態における分電盤について、図１〜４を用いて説明を行う。以下、図１における上下左右を基準とし、上下左右方向と直交する方向を前後方向とする。 (Embodiment)
The distribution board in this embodiment is demonstrated using FIGS. In the following, the direction perpendicular to the up / down / left / right direction is defined as the front / rear direction with reference to the up / down / left / right direction in FIG.

本実施形態における、分電盤は、盤本体１と、盤本体１内部に配設される主幹ブレーカ２と、主幹ブレーカ２に一端が各々接続される３つの接続バー３と、接続バー３の他端が各々接続され、１つが中性極用バー４Ａ（導電バー４Ａ）、残りの２つが電圧極用バー４Ｂ（導電バー４Ｂ）、電圧極用バー４Ｃ（導電バー４Ｃ）に用いられる３つの導電バー４と、樹脂等の非導電性材料から形成されて３つの導電バー４の一端がそれぞれ絶縁された状態で支持される支持部材１４と、樹脂等の非導電性材料から形成されて導電バー４の他端がそれぞれ絶縁された状態で支持される支持台１５と、２極の端子部が設けられて中性極用バー３Ａと電圧極用バー３Ｂまたは３Ｃとが各極にそれぞれ接続される２４個の分岐ブレーカ５とを備える。   In the present embodiment, the distribution board includes a board body 1, a main breaker 2 disposed inside the board body 1, three connection bars 3 each having one end connected to the main breaker 2, and a connection bar 3. The other ends are connected to each other, one is used for the neutral electrode bar 4A (conductive bar 4A), and the other two are used for the voltage electrode bar 4B (conductive bar 4B) and the voltage electrode bar 4C (conductive bar 4C). Two conductive bars 4, a support member 14 formed of a non-conductive material such as resin and supported in a state where one end of each of the three conductive bars 4 is insulated, and a non-conductive material such as resin. A support base 15 that is supported in a state where the other ends of the conductive bars 4 are insulated from each other, a two-pole terminal portion is provided, and a neutral pole bar 3A and a voltage pole bar 3B or 3C are provided on each pole. And 24 branch breakers 5 connected thereto.

まず、盤本体１は、筐体１１と筐体１１に覆設される蓋部１２とで構成され、筐体１１は、矩形の底板１１ａの周縁から周壁１１ｂが略垂直に突出して一面を開口した略矩形箱状に形成されており、開口面にはヒンジ構造を有する蓋部１２が覆設されて開閉可能となっている。また、底板１１ａの四隅には、樹脂等により略円筒状に形成されたスペーサ６が固定されており、上下方向に長い一対の長尺状のブラケット７がスペーサ６を介して配設されている。ブラケット７には、上下方向に沿って、前後方向に複数のねじ穴７ａが設けられ、一対のブラケット７間の上方には、上から順に所定の間隔を空けて中板８，９が直接架設されてねじ穴７ａにねじ留めによって固定される。そして、中板８，９には、主幹ブレーカ２が配設される。   First, the panel main body 1 is composed of a casing 11 and a lid portion 12 that covers the casing 11, and the casing 11 has a peripheral wall 11b that protrudes substantially perpendicularly from the periphery of a rectangular bottom plate 11a and opens one side. The lid portion 12 having a hinge structure is covered on the opening surface and can be opened and closed. In addition, spacers 6 formed in a substantially cylindrical shape by resin or the like are fixed to the four corners of the bottom plate 11a, and a pair of long brackets 7 that are long in the vertical direction are disposed via the spacers 6. . The bracket 7 is provided with a plurality of screw holes 7a in the front-rear direction along the vertical direction, and the intermediate plates 8 and 9 are directly installed above the pair of brackets 7 with a predetermined interval from the top. Then, it is fixed to the screw hole 7a by screwing. The main breakers 2 are disposed on the intermediate plates 8 and 9.

主幹ブレーカ２は、一端に、図示しない３線式の電源線が接続されて１００／２００Ｖの電源が供給される３極の１次端子２ａ１、２ａ２、２ａ３が等間隔に設けられており、中央の１次端子２ａ１は外部電源からの中性線が接続される中性極で、その両側の１次端子２ａ２（左側）、２ａ３（右側）は外部電源からの電圧線が接続される電圧極となっている。そして、主幹ブレーカ２の他端には、接続バー３を介して３つの導電バー４にそれぞれ接続される３極の２次端子２ｂ１、２ｂ２、２ｂ３が等間隔に設けられており、中央の２次端子２ｂ１は中性極で、その両側の２次端子２ｂ２（左側）、２ｂ３（右側）は電圧極である。また、主幹ブレーカ２の前面の略中央には、１次端子２ａ１、２ａ２、２ａ３と２次端子２ｂ１、２ｂ２、２ｂ３との端子間の導通、遮断を切り替える操作ハンドル部２ｃが設けられており、後面は中板８，９に対向して配設され、１次端子側は中板８にねじ留めにより固定され、２次端子側は中板９にねじ留めにより固定される。 The main breaker 2 is provided at one end with three-pole primary terminals 2a 1 , 2a 2 , 2a 3 which are connected to a three-wire power line (not shown) and supplied with 100 / 200V power at equal intervals. The primary terminal 2a 1 at the center is a neutral pole to which a neutral wire from an external power source is connected, and the primary terminals 2a 2 (left side) and 2a 3 (right side) on both sides thereof are voltage lines from the external power source. Is the voltage pole to be connected. At the other end of the main breaker 2, tripolar secondary terminals 2b 1 , 2b 2 , 2b 3 connected to the three conductive bars 4 via the connection bar 3 are provided at equal intervals, The central secondary terminal 2b 1 is a neutral electrode, and the secondary terminals 2b 2 (left side) and 2b 3 (right side) on both sides thereof are voltage electrodes. An operation handle portion 2c for switching between conduction and blocking between the terminals of the primary terminals 2a 1 , 2a 2 , 2a 3 and the secondary terminals 2b 1 , 2b 2 , 2b 3 is provided at the approximate center of the front surface of the main breaker 2 The rear surface is arranged to face the middle plates 8 and 9, the primary terminal side is fixed to the middle plate 8 by screwing, and the secondary terminal side is fixed to the middle plate 9 by screwing. The

次に、前記一対のブラケット７の下方には、一方片１７ａと、他方片１７ｂ、と一方片１７ａ及び他方片１７ｂを接続する連結部１７ｃとから断面略コの字状に形成される支持部材１７がそれぞれ取り付けられている。支持部材１７の一方片１７ａには、上下方向に沿って、前後方向に複数のねじ穴１７ｄが複数設けられ、一対の支持部材１７間には、中板１０が架設されてねじ穴１７ｄにねじ留めによって固定される。つまり、中板１０は、支持部材１７を介した分だけ、前記中板８，９よりも前方に配設される。そして、中板１０には、導電バー４と支持部材１４と支持台１５と分岐ブレーカ５とが配設される。   Next, below the pair of brackets 7, a support member formed in a substantially U-shaped cross section from one piece 17a, the other piece 17b, and a connecting portion 17c connecting the one piece 17a and the other piece 17b. 17 are respectively attached. The one piece 17a of the support member 17 is provided with a plurality of screw holes 17d in the front-rear direction along the vertical direction, and the intermediate plate 10 is installed between the pair of support members 17 to be screwed into the screw holes 17d. Fixed by fastening. That is, the intermediate plate 10 is disposed in front of the intermediate plates 8 and 9 by the amount corresponding to the support member 17. The middle plate 10 is provided with the conductive bar 4, the support member 14, the support base 15, and the branch breaker 5.

また、中板１０の後面側には、上下方向に所定の間隔を空けて２つの支持板１３が一対のブラケット７間に架設されており、２つの支持板１３は、中板８，９よりも後方に位置する。   Further, on the rear surface side of the intermediate plate 10, two support plates 13 are installed between the pair of brackets 7 at a predetermined interval in the vertical direction. The two support plates 13 are formed from the intermediate plates 8 and 9. Is also located behind.

導電バー４は、銅等の平角導体から電流容量に応じた幅の長尺状に形成されて、下端に短手方向に沿ってねじ１６が挿通する２つの図示しない挿通孔が設けられ、３つの導電バー４Ａ，４Ｂ，４Ｃは、互いに厚み方向に沿って隙間を介して対向して配設され、長手方向を筐体１１の長手方向に向けて中板１０の略中央に配設される。ここで、中性極用バー４Ａは、電圧極用バー４Ｂと４Ｃとの間に配設され、電圧極用バー４Ｂが筐体１０の開口面に最も近い側に配設される。さらに、中性極用バー４Ａは、接続バー３Ａを介して主幹ブレーカ２の２次端子２ｂ１（中性極）に接続され、電圧極用バー４Ｂ、４Ｃはそれぞれ接続バー３Ｂ，３Ｃを介して主幹ブレーカ２の２次端子２ｂ２、２ｂ３（電圧極）に各々接続される。そして、各導電バー４の長尺方向の下端は、支持部材１４に支持固定され、上端は一対の支持台１５によって支持固定される。加えて、３つの導電バー４Ａ、４Ｂ，４Ｃはそれぞれ長さが異なり、導電バー４Ｃ、４Ａ、４Ｂの順に長く、各導電バー４の上端は上下方向で揃えて配設され、導電バー４Ａの下端は導電バー４Ｂの下端よりも下方に突出しており、導電バー４Ｃの下端は導電バー４Ａの下端よりも下方に突出している。 The conductive bar 4 is formed in a long shape with a width corresponding to the current capacity from a flat conductor such as copper, and two lower insertion holes (not shown) through which the screws 16 are inserted along the short direction are provided at the lower end. The two conductive bars 4 </ b> A, 4 </ b> B, and 4 </ b> C are disposed to face each other with a gap along the thickness direction, and are disposed at the approximate center of the intermediate plate 10 with the longitudinal direction facing the longitudinal direction of the housing 11. . Here, the neutral electrode bar 4 </ b> A is disposed between the voltage electrode bars 4 </ b> B and 4 </ b> C, and the voltage electrode bar 4 </ b> B is disposed on the side closest to the opening surface of the housing 10. Further, the neutral electrode bar 4A is connected to the secondary terminal 2b 1 (neutral electrode) of the main breaker 2 through the connection bar 3A, and the voltage electrode bars 4B and 4C are connected to the connection terminals 3B and 3C, respectively. Are connected to the secondary terminals 2b 2 and 2b 3 (voltage electrodes) of the main breaker 2, respectively. The lower end of each conductive bar 4 in the longitudinal direction is supported and fixed to the support member 14, and the upper end is supported and fixed by a pair of support bases 15. In addition, the three conductive bars 4A, 4B, and 4C have different lengths and are longer in the order of the conductive bars 4C, 4A, and 4B, and the upper ends of the conductive bars 4 are arranged in the vertical direction. The lower end protrudes below the lower end of the conductive bar 4B, and the lower end of the conductive bar 4C protrudes below the lower end of the conductive bar 4A.

支持部材１４は、導電バー４の下端に配設され、導電バー４の下端がそれぞれ厚み方向に隙間を介して支持され、導電バー４の下端と接続バー３の他端とが、ねじ１６に共締めされることで電気的に接続される。   The support member 14 is disposed at the lower end of the conductive bar 4, and the lower end of the conductive bar 4 is supported via a gap in the thickness direction. The lower end of the conductive bar 4 and the other end of the connection bar 3 are connected to the screw 16. It is electrically connected by being fastened together.

支持台１５は、導電バー４の上端に配設され、各導電バー４の上端がそれぞれ厚み方向に隙間を介して支持され、分離絶縁される
分岐ブレーカ５は、一端側側面に導電バー４が嵌合する３つの切り欠き部５ａを備え、その内の２つに導電バー４と接続される電源端子部５ｂが設けられる。そして、分岐ブレーカ５の他端側側面には外部負荷等に接続される２つの負荷側端子部５ｃを備える。また、分岐ブレーカ５の前面には、電源側端子部５ｂと負荷側端子部５ｃとの端子間を導通、遮断する操作ハンドル部５ｄが設けられている。さらに、分岐ブレーカ５は、導電バー４の長尺方向に沿って導電バー４の各長辺側に電源端子部５ｂを対向させた状態で１２個ずつ並設されており、電源端子部５ｂの２つの電極にはそれぞれ導電バー４の中性極用バー４Ａと電圧極用バー４Ｂまたは４Ｃとがプラグイン接続される。 The support base 15 is disposed at the upper end of the conductive bar 4, and the upper end of each conductive bar 4 is supported via a gap in the thickness direction and separated and insulated. The branch breaker 5 has the conductive bar 4 on one side surface. Three notch portions 5a to be fitted are provided, and two of them are provided with power supply terminal portions 5b connected to the conductive bar 4. And the two load side terminal parts 5c connected to an external load etc. are provided in the other end side surface of the branch breaker 5. FIG. Further, on the front surface of the branch breaker 5, there is provided an operation handle portion 5d for conducting and blocking between the terminals of the power supply side terminal portion 5b and the load side terminal portion 5c. Further, twelve branch breakers 5 are arranged in parallel along the longitudinal direction of the conductive bar 4 with the power supply terminal portions 5b facing each long side of the conductive bar 4, and the power supply terminal portions 5b The neutral electrode bar 4A and the voltage electrode bar 4B or 4C for the conductive bar 4 are plug-in connected to the two electrodes, respectively.

そして上記のように、支持部材１７を介してブラケット７に固定された中板１０が、ブラケット７に直接固定された中板８，９よりも前方に設けられているため、中板１０に配設された分岐ブレーカ５は、中板８，９に配設された主幹ブレーカ２よりも前方に位置する。   As described above, since the intermediate plate 10 fixed to the bracket 7 via the support member 17 is provided in front of the intermediate plates 8 and 9 fixed directly to the bracket 7, the intermediate plate 10 is arranged on the intermediate plate 10. The provided branch breaker 5 is located in front of the main breaker 2 disposed on the middle plates 8 and 9.

さらに、分岐ブレーカ５にプラグイン接続される導電バー４Ａ，４Ｂ，４Ｃと、主幹ブレーカ２の２次端子２ｂ１、２ｂ２、２ｂ３とをそれぞれ接続する３つの接続バー３は、図４に示す通り、主幹ブレーカ２の２次端子部２ｂ１と導電バー４Ａとを接続する接続バー３Ａと、主幹ブレーカ２の２次端子２ｂ２と導電バー４Ｂとを接続する接続バー３Ｂと、主幹ブレーカ２の２次端子２ｂ３と導電バー４Ｃとを接続する接続バー３Ｃとから構成される。 Furthermore, three connection bars 3 for connecting the conductive bars 4A, 4B, 4C plug-in-connected to the branch breaker 5 and the secondary terminals 2b 1 , 2b 2 , 2b 3 of the main breaker 2 are shown in FIG. a connecting bar 3B to be connected through a connecting bar 3A which connects the secondary terminal portion 2b 1 and the conductive bar 4A of the main breaker 2, and a secondary terminal 2b 2 and the conductive bar 4B of the main breaker 2 shown, the main breaker composed of a connecting bar 3C for connecting the second secondary terminal 2b 3 and the conductive bar 4C.

まず、接続バー３Ａは、主幹ブレーカ２の２次端子２ｂ１に接続される第一の接続部３１と、上下方向に長い長尺板状に形成されて上端が第一の接続部３１と接続されるバー本体３２Ａと、バー本体３２Ａの下端と導電バー３Ａとを接続する第二の接続部３３とを備え、第一の接続部３１は、主幹ブレーカ２の２次端子部２ｂ１に接続される接続部３１ａと、接続部３１ａの下端から後方へ向けて延設される延設部３１ｂと、延設部３１ｂの先端とバー本体３２Ａとを接続する接続部３１ｃとから形成され、第二の接続部３３は、バー本体３２Ａの下端に接続される接続部３３ａと、接続部３３ａの上端から斜め上前方に向けて延設される延設部３３ｂと、延設部３３ｂの先端と導電バー３Ａとを接続する接続部３３ｃとから形成される。 First, connection bar 3A is connected to the first connecting portion 31 connected to the secondary terminal 2b 1 of the master breaker 2, the upper end is formed in a long elongated plate-shaped vertically and the first connecting portion 31 and a bar body 32A to be, and a second connecting portion 33 for connecting the lower end and the conductive bar 3A of the bar body 32A, the first connecting portion 31 is connected to a secondary terminal portion 2b 1 of the master breaker 2 Formed by a connecting portion 31a, an extending portion 31b extending rearward from the lower end of the connecting portion 31a, and a connecting portion 31c connecting the tip of the extending portion 31b and the bar body 32A. The second connecting portion 33 includes a connecting portion 33a connected to the lower end of the bar main body 32A, an extending portion 33b extending obliquely upward and forward from the upper end of the connecting portion 33a, and a tip of the extending portion 33b. The connecting portion 33c is connected to the conductive bar 3A.

次に、接続バー３Ｂは、主幹ブレーカ２の２次端子２ｂ２に接続される第一の接続部３４と、上下方向に長い長尺板状に形成されて上端が第一の接続部３４と接続されるバー本体３２Ｂと、バー本体３２Ｂと導電バー３Ｂとを接続する第二の接続部３５とを備え、第一の接続部３４は、主幹ブレーカ２の２次端子部２ｂ２に接続される接続部３４ａと、接続部３４ａの下端から後方へ向けて延設される延設部３４ｂと、左斜め下方へ形成されて延設部３４ｂの先端とバー本体３２Ｂとを接続する接続部３４ｃとから形成され、第二の接続部３５は、バー本体３２Ｂの下端近傍に接続される接続部３５ａと、接続部３５ａの上端から前方に向けて延設される延設部３５ｂと、延設部３５ｂの先端と導電バー３Ｂとを接続する接続部３５ｃとから形成される。 Next, the connection bar 3B has a first connection portion 34 connected to the secondary terminal 2b 2 of the main breaker 2, and a long plate shape that is long in the vertical direction, and has an upper end at the first connection portion 34. comprising a bar body 32B which is connected, a second connecting portion 35 for connecting the bar body 32B and the conductive bar 3B, the first connecting portion 34 is connected to the secondary terminal portion 2b 2 of the master breaker 2 Connecting portion 34a, an extending portion 34b extending rearward from the lower end of the connecting portion 34a, and a connecting portion 34c formed obliquely downward to the left and connecting the tip of the extending portion 34b and the bar body 32B. The second connection portion 35 is formed of a connection portion 35a connected in the vicinity of the lower end of the bar body 32B, an extension portion 35b extending forward from the upper end of the connection portion 35a, and an extension A connecting portion 35c for connecting the tip of the portion 35b and the conductive bar 3B. It is formed.

続いて、接続バー３Ｃは、主幹ブレーカ２の２次端子２ｂ３に接続される第一の接続部３６と、上下方向に長い長尺板状に形成されて上端が第一の接続部３６と接続されるバー本体３２Ｃと、バー本体３２Ｃと導電バー３Ｃとを接続する第二の接続部３７とを備え、第一の接続部３６は、主幹ブレーカ２の２次端子部２ｂ３に接続される接続部３６ａと、接続部３６ａの下端から後方へ向けて延設される延設部３６ｂと、右斜め下方へ形成されて延設部３６ｂの先端とバー本体３２Ｃとを接続する接続部３６ｃとから形成され、第二の接続部３７は、バー本体３２Ｃの下端近傍に接続される接続部３７ａと、接続部３７ａの左端から前方に向けて延設される延設部３７ｂと、延設部３７ｂの先端と導電バー３Ｃとを接続する接続部３７ｃとから形成される。 Subsequently, the connection bar 3C includes a first connection portion 36 connected to the secondary terminal 2b 3 of the main breaker 2, and a long plate shape that is long in the vertical direction, and an upper end thereof is connected to the first connection portion 36. A bar main body 32C to be connected and a second connection portion 37 for connecting the bar main body 32C and the conductive bar 3C are provided. The first connection portion 36 is connected to the secondary terminal portion 2b 3 of the main breaker 2. Connecting portion 36a, an extending portion 36b extending rearward from the lower end of the connecting portion 36a, and a connecting portion 36c formed obliquely downward to the right and connecting the tip of the extending portion 36b and the bar body 32C. The second connection portion 37 is formed of a connection portion 37a connected to the vicinity of the lower end of the bar main body 32C, an extension portion 37b extending forward from the left end of the connection portion 37a, and an extension A connecting portion 37c for connecting the tip of the portion 37b and the conductive bar 3C; Is al formation.

また、上記バー本体３２Ａ、３２Ｂ，３２Ｃは、中板１０と支持板１３との間に左右方向に並んで略平行に配設され、一対の支持板１３に左右方向に略等間隔に設けられた３つの支持台２２にそれぞれ支持固定される。   The bar bodies 32A, 32B, and 32C are arranged in parallel in the left-right direction between the middle plate 10 and the support plate 13, and are provided on the pair of support plates 13 at substantially equal intervals in the left-right direction. Each of the three support bases 22 is supported and fixed.

さらに、上記接続部３３ｃ、３５ｃ、３７ｃは、一対の挿通孔３３ｄ、３５ｄ、３７ｄが左右方向に各々穿設され、前記支持部材１４において導電バー３Ａ，３Ｂ，３Ｃの下端の上面に重ねて配設される。そして、ねじ１６が、挿通孔３３ｄ、３５ｄ、３７ｄを各々挿通して支持部材１４内の図示しない各ねじ穴に螺合されることで接続部３３ｃ、３５ｃ、３７ｃは固定される。   Further, the connection portions 33c, 35c, and 37c have a pair of insertion holes 33d, 35d, and 37d formed in the left-right direction, respectively, and are arranged on the upper surface of the lower ends of the conductive bars 3A, 3B, and 3C in the support member 14. Established. The screws 16 are inserted through the insertion holes 33d, 35d, and 37d and screwed into screw holes (not shown) in the support member 14, whereby the connecting portions 33c, 35c, and 37c are fixed.

そして、導電バー４Ａ、４Ｂ，４Ｃの下端の位置が、前方から見てそれぞれ異なることから、導電バー４の下端に接続される接続部３３ｃ、３５ｃ、３７ｃのねじ穴３３ｄ、３５ｄ、３７ｄは、それぞれ前後方向において重ならず、組み立てが容易となっている。   Since the positions of the lower ends of the conductive bars 4A, 4B, 4C are different from each other when viewed from the front, the screw holes 33d, 35d, 37d of the connection portions 33c, 35c, 37c connected to the lower ends of the conductive bars 4 are Each of them does not overlap in the front-rear direction, making assembly easy.

上記の構成により、本実施形態における分電盤においては、３つの接続バー３が中板１０の後方を中板１０と対向して略平行に配設され、主幹ブレーカ２から最も離れた導電バー４の下端にそれぞれ接続される。そのため、導電バー４に流れる電流は、下端が最大となり、上に進むに従って分流され、それに伴い導電バー４の温度上昇は、主幹ブレーカ２に近くなるにつれて小さくなる。従って、図５に示すような従来から用いられている分電盤のように、主幹ブレーカ２に最も近い導電バー４の上端に接続バー３が接続される場合と比べて、本実施形態で用いられる分電盤の導電バー４の上端近傍の温度上昇は小さくなる。   With the configuration described above, in the distribution board according to the present embodiment, the three connection bars 3 are disposed substantially in parallel with the rear of the middle plate 10 facing the middle plate 10, and are the conductive bars farthest from the main breaker 2. 4 are respectively connected to the lower ends. Therefore, the current flowing through the conductive bar 4 has a maximum at the lower end and is shunted as it goes upward, and accordingly, the temperature rise of the conductive bar 4 becomes smaller as it approaches the main breaker 2. Therefore, compared with the case where the connection bar 3 is connected to the upper end of the conductive bar 4 closest to the main breaker 2 as in the distribution board conventionally used as shown in FIG. The temperature rise near the upper end of the conductive bar 4 of the distribution board is small.

従って、主幹ブレーカ２で発生した熱気が導電バー４側へ伝達しても、導電バー４の主幹ブレーカ側周辺の温度上昇を抑制することができ、導電バー４の主幹ブレーカ２側にプラグイン接続される分岐ブレーカ５の誤作動を防止することができる。   Therefore, even if hot air generated in the main breaker 2 is transmitted to the conductive bar 4 side, the temperature rise around the main breaker side of the conductive bar 4 can be suppressed, and plug-in connection is made to the main breaker 2 side of the conductive bar 4. It is possible to prevent malfunction of the branch breaker 5 to be operated.

また、導電バー４と分岐ブレーカ５とが設けられる中板１０は、支持部材１７を介してブラケット７に固定されているので、主幹ブレーカ２が設けられた中板８，９よりも前方に位置するため、図５に示す従来例に比べて導電バー４と分岐ブレーカ５とが主幹ブレーカ５から離れた位置にあり、主幹ブレーカ２で発生する熱気が導電バー４及び分岐ブレーカ５近傍に伝わり難い構造となっている。   Further, since the middle plate 10 on which the conductive bar 4 and the branch breaker 5 are provided is fixed to the bracket 7 via the support member 17, it is positioned in front of the middle plates 8 and 9 on which the main breaker 2 is provided. Therefore, as compared with the conventional example shown in FIG. 5, the conductive bar 4 and the branch breaker 5 are located away from the main breaker 5, and hot air generated in the main breaker 2 is not easily transmitted to the vicinity of the conductive bar 4 and the branch breaker 5. It has a structure.

なお、本実施形態で示したように、接続バー３のバー本体３２Ａ、３２Ｂ，３２Ｃが、中板１０の後方に配設されることで、バー本体３２Ａ、３２Ｂ，３２Ｃが、ブラケット７と筐体１１の周壁１１ｂとの間に配設される場合と比べ、接続バー３の全長を短くすることができ、接続バー３から発生する発熱が抑制され、更に接続バー３を配設するために筐体１１の左右方向の長さを大きくする必要もない。   As shown in the present embodiment, the bar main bodies 32A, 32B, 32C of the connection bar 3 are arranged behind the intermediate plate 10, so that the bar main bodies 32A, 32B, 32C are connected to the bracket 7 and the housing. Compared with the case where it is arranged between the peripheral wall 11b of the body 11, the total length of the connection bar 3 can be shortened, the heat generated from the connection bar 3 is suppressed, and the connection bar 3 is further arranged. It is not necessary to increase the length of the housing 11 in the left-right direction.

実施形態における分電盤の正面図である。It is a front view of the electricity distribution panel in an embodiment. 同上における分電盤の接続バーの配置図である。It is a layout view of the connection bar of the distribution board in the same. 同上における分電盤のＡ−Ａ断面図である。It is AA sectional drawing of the electricity distribution panel in the same as the above. 同上における接続バーの斜視図である。It is a perspective view of the connection bar in the same as the above. 従来例における分電盤の正面図である。It is a front view of the distribution board in a prior art example.

符号の説明Explanation of symbols

１ 筐体
２ 主幹ブレーカ
３ 接続バー
４ 導電バー
５ 分岐ブレーカ 1 Housing 2 Main Breaker 3 Connection Bar 4 Conductive Bar 5 Branch Breaker

Claims (2)

主幹ブレーカと、
主幹ブレーカの負荷側端子に一端が各々接続される複数の接続バーと、
前記接続バーの他端と各々接続され、互いに厚み方向に沿って対向して配設される長尺状の複数の導電バーと、
前記導電バーの長手方向に並設されて、導電バーに各々接続される複数の分岐ブレーカとを中空箱状の筐体内に備え、
前記接続バーの他端が、主幹ブレーカから最も離れた導電バーの端部と接続されることを特徴とする分電盤。 With the main breaker,
A plurality of connection bars each having one end connected to the load-side terminal of the main breaker;
A plurality of long conductive bars connected to the other ends of the connection bars and arranged to face each other along the thickness direction;
A plurality of branch breakers arranged in parallel in the longitudinal direction of the conductive bar and respectively connected to the conductive bar are provided in a hollow box-shaped housing,
A distribution board characterized in that the other end of the connection bar is connected to the end of the conductive bar farthest from the main breaker. 前記接続バーは、前面に操作ハンドルが設けられる前記分岐ブレーカの後面と対向して配置されることを特徴とする請求項１記載の分電盤。   The distribution board according to claim 1, wherein the connection bar is disposed to face a rear surface of the branch breaker having an operation handle on a front surface.
JP2008138645A 2008-05-27 2008-05-27 Distribution board Active JP4724203B2 (en)

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Publication number Priority date Publication date Assignee Title
JP3003850B2 (en) * 1998-05-12 2000-01-31 河村電器産業株式会社 Switchboard
JP4501544B2 (en) * 2004-06-18 2010-07-14 パナソニック電工株式会社 Distribution board
JP2007089300A (en) * 2005-09-21 2007-04-05 Matsushita Denko Denro System Kk Distribution board

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