JP2007028896A - Assembling method of vehicle mounted electric connection box - Google Patents

Assembling method of vehicle mounted electric connection box Download PDF

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JP2007028896A
JP2007028896A JP2006214851A JP2006214851A JP2007028896A JP 2007028896 A JP2007028896 A JP 2007028896A JP 2006214851 A JP2006214851 A JP 2006214851A JP 2006214851 A JP2006214851 A JP 2006214851A JP 2007028896 A JP2007028896 A JP 2007028896A
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bus bar
bolt
current sensor
bus
case
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JP4140643B2 (en
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Takahiro Asao
高広 浅生
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Sumitomo Wiring Systems Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To enhance workability by preventing contact between a bus bar constituting a laminate and the head of a bolt used for bolting the bus bar passing a current sensor contained in the case of an electric connection box. <P>SOLUTION: After penetrating a first bus bar through the through hole of a current sensor, the current sensor is fixed to a current sensor fixing portion provided on the bottom wall of a lower case and a joint of the first bus bar and a second bus bar is formed by laying the second bus bar on top of the first bus bar. Furthermore, an alternate laminate of bus bars and insulating panels is arranged above the joint of the first bus bar and the second bus bar, a bolt is inserted from below into a bolt fixing hole provided in the bottom wall of the lower case, and the bolt is tightened and secured to a nut at a nut burying portion projecting downward from the lower surface side of the insulting panel on the lowermost layer in the laminate through the joint of the first bus bar and the second bus bar. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、車載用電気接続箱の組立方法に関し、詳しくは、ケース内にバスバーに流れる電流を検出する電流センサーを収容するものである。   The present invention relates to a method for assembling an on-vehicle electrical junction box, and more specifically, houses a current sensor for detecting a current flowing in a bus bar in a case.

従来、自動車に搭載される電気接続箱には、バスバーに流れる電流を検出するための電流センサーを設けたものがある。
例えば、特開平９−８００８０号公報（特許文献１）において、図３に示す電気接続箱１が開示されている。該電気接続箱１では、電流センサー２の貫通穴２ａに第１バスバー３を通すと共に、下流側で第１バスバー３と他の第２バスバー４とをケース５に設けた接続部６に埋設したナットＮとボルトＢとのボルト締めによりケース５に固定している。このボルト締めは、図４に示すように、ケース内面側、即ち、上方側からボルトＢを第１、第２バスバー３、４に設けたボルト穴３ａ、４ａに通して行っており、ボルト締め後、ボルト頭部Ｂ１はケース５内に配置されることとなる。 2. Description of the Related Art Conventionally, some electrical connection boxes mounted on automobiles are provided with a current sensor for detecting a current flowing through a bus bar.
For example, Japanese Patent Laid-Open No. 9-80080 (Patent Document 1) discloses an electrical junction box 1 shown in FIG. In the electrical junction box 1, the first bus bar 3 is passed through the through hole 2 a of the current sensor 2, and the first bus bar 3 and the other second bus bar 4 are embedded in the connection portion 6 provided in the case 5 on the downstream side. The nut 5 and the bolt B are fastened to the case 5 by tightening. As shown in FIG. 4, the bolt tightening is performed by passing the bolt B through the bolt holes 3a and 4a provided in the first and second bus bars 3 and 4 from the case inner surface side, that is, the upper side. Thereafter, the bolt head B <b> 1 is disposed in the case 5.

特許文献１で開示されている電気接続箱１では、電流センサー２と第１、第２バスバー３、４の上方にバスバー７と絶縁板８とを交互に積層した積層体９を配置すると、第１、第２バスバー３、４を固定しているボルトＢのボルト頭部Ｂ１と積層体９の最下層のバスバー７Ａとが接触して短絡するおそれがある。
また、第１バスバー３と第２バスバー４とをボルト締めした後に積層体９をケース５内に収容し、その後、第２バスバー４と積層体９のバスバー７とをボルト締め接続する構成とすると、各ボルト締め作業の間に積層体９をケース５内に収容する工程が入り、前記ボルト締め作業を１つの工程ですることができなくなり作業効率が良くない問題がある。
逆に、第１バスバー３と第２バスバー４とをボルト締め固定する前に積層体９をケース５内に収容し、積層体９の各絶縁板８に設けた貫通穴（図示せず）に上方からボルトを通して第１バスバー３と第２バスバー４とをボルト締め固定すると、前記の２つのボルト締め作業（第１バスバー３と第２バスバー４との接続作業、第２バスバー４とバスバー７との接続作業）を１つの工程ですることができる。しかしながら、このような構成とすると積層体９のボルトを通す箇所にはバスバー７を配置することができず、バスバーの配置効率が悪くなる問題がある。
特開平９−８００８０号公報 In the electrical junction box 1 disclosed in Patent Document 1, when the laminated body 9 in which the bus bars 7 and the insulating plates 8 are alternately laminated is disposed above the current sensor 2 and the first and second bus bars 3 and 4, There is a possibility that the bolt head B1 of the bolt B fixing the first and second bus bars 3 and 4 and the lowermost bus bar 7A of the laminate 9 come into contact with each other and short-circuit.
Further, after the first bus bar 3 and the second bus bar 4 are bolted, the laminated body 9 is accommodated in the case 5 and then the second bus bar 4 and the bus bar 7 of the laminated body 9 are bolted and connected. There is a problem in that a step of accommodating the laminated body 9 in the case 5 enters between each bolting operation, and the bolting operation cannot be performed in one step, resulting in poor work efficiency.
Conversely, before the first bus bar 3 and the second bus bar 4 are bolted and fixed, the laminated body 9 is accommodated in the case 5 and is inserted into through holes (not shown) provided in the insulating plates 8 of the laminated body 9. When the first bus bar 3 and the second bus bar 4 are bolted and fixed through bolts from above, the two bolt tightening operations (connection operation between the first bus bar 3 and the second bus bar 4, the second bus bar 4 and the bus bar 7 and Can be performed in one step. However, with such a configuration, there is a problem that the bus bar 7 cannot be disposed at a portion through which the bolt of the laminated body 9 passes, and the arrangement efficiency of the bus bar is deteriorated.
Japanese Patent Laid-Open No. 9-80080

本発明は前記問題に鑑みてなされたものであり、電気接続箱のケース内に収容する電流センサーを通すバスバーのボルト締めに用いるボルトの頭部と積層体を構成するバスバーとの接触を防止すると共に、前記積層体を構成するバスバーの配置効率を高めることができ、さらに、バスバーのボルト締め作業を効率的に行えることを課題としている。   The present invention has been made in view of the above problems, and prevents contact between the head of the bolt used for bolting the bus bar that passes the current sensor accommodated in the case of the electrical junction box and the bus bar constituting the laminate. At the same time, it is an object of the present invention to increase the arrangement efficiency of the bus bars constituting the laminate and to efficiently perform the bolting operation of the bus bars.

前記課題を解決するため、本発明は、アッパーケースとロアケースとからなるケース内にバスバーと絶縁板とが交互に積層された積層体が収容されていると共に、前記積層体のバスバーとボルト締めで連結する第１バスバーと第２バスバーとからなる特定バスバーを設け、前記第１バスバーに電流センサーが取り付けられる車載用電気接続箱の組立方法であって、
前記電流センサーの貫通穴に前記第１バスバーを貫通させた電流センサーを、前記ロアケースの底壁に設けられた電流センサー取付部に取り付けた後、
前記第１バスバーに前記第２バスバーを重ね合わせて前記第１バスバーと前記第２バスバーとの接続部を形成し、
さらに、前記第１バスバーと前記第２バスバーとの接続部の上方に前記積層体を配置して、前記ロアケース底壁に設けられたボルト取付穴にボルトを下方から挿入させ、該ボルトを前記第１バスバーと前記第２バスバーとの接続部を通して、前記積層体の最下層の絶縁板の下面側に下向きに突設されたナット埋設部のナットと締結固定させることを特徴とする車載用電気接続箱の組立方法を提供している。 In order to solve the above-mentioned problem, the present invention includes a case in which a laminated body in which bus bars and insulating plates are alternately laminated is accommodated in a case composed of an upper case and a lower case, and the bus bar and bolts of the laminated body are tightened. A method for assembling an on-vehicle electrical junction box in which a specific bus bar composed of a first bus bar and a second bus bar to be connected is provided, and a current sensor is attached to the first bus bar,
After attaching the current sensor having the first bus bar penetrated through the through hole of the current sensor to the current sensor mounting portion provided on the bottom wall of the lower case,
Forming a connection portion between the first bus bar and the second bus bar by overlaying the second bus bar on the first bus bar;
Further, the laminated body is disposed above a connection portion between the first bus bar and the second bus bar, and a bolt is inserted from below into a bolt mounting hole provided in the bottom wall of the lower case, and the bolt is inserted into the first bus bar. An in-vehicle electrical connection characterized by being fastened and fixed to a nut embedded in a nut embedded portion projecting downward on the lower surface side of the lowermost insulating plate of the laminated body through a connection portion between one bus bar and the second bus bar A method for assembling the box is provided.

具体的には、前記第１バスバーおよび前記第２バスバーとして両端に上端屈曲部と下端屈曲部とを有するバスバーを用い、前記第１バスバーの下端屈曲部を前記電流センサーの貫通穴に貫通させ、その先端を前記第２バスバーの下端屈曲部に重ね合わせ、該重ね合わせ部に設けられているボルト穴に前記ボルトを挿通して前記ナットで締結し、かつ、前記第１バスバーと前記第２バスバーの上端屈曲部をヒュージブルリンクと導通させることが好ましい。   Specifically, a bus bar having an upper end bent portion and a lower end bent portion at both ends as the first bus bar and the second bus bar, the lower end bent portion of the first bus bar is passed through the through hole of the current sensor, The front end of the second bus bar is overlapped with the lower bent portion of the second bus bar, the bolt is inserted into a bolt hole provided in the overlap portion, and fastened with the nut. The first bus bar and the second bus bar It is preferable to make the upper end bent portion of the first and second bent portions conductive with the fusible link.

前記組立方法によれば、第１バスバーと第２バスバーとを上方からボルト締めしてロアケースに固定するのではなく、第１バスバーと第２バスバーとを下方からボルト締めして積層体の最下層絶縁板に固定しているため、前記ボルトの頭部が第１、第２バスバーの下面側に配置される。よって、ボルト頭部と積層体のバスバーとが対向配置されず、ボルト頭部と積層体の最下層のバスバーとが接触して短絡するのを防止することができる。
また、第１バスバーと第２バスバーとを下方からボルト締めすることにより、第１、第２バスバーの上方に配置する積層体にボルトを貫通させる必要もなく、バスバーの配置がボルトの貫通によって制限されることがない。 According to the assembling method, the first bus bar and the second bus bar are not bolted from the upper side and fixed to the lower case, but the first bus bar and the second bus bar are bolted from the lower side to lower the lowermost layer of the laminate. Since it is fixed to the insulating plate, the heads of the bolts are arranged on the lower surface sides of the first and second bus bars. Therefore, the bolt head and the bus bar of the laminated body are not opposed to each other, and the bolt head and the lowermost bus bar of the laminated body can be prevented from coming into contact with each other and short-circuiting.
Further, by bolting the first bus bar and the second bus bar from below, there is no need to penetrate the bolt through the laminated body arranged above the first and second bus bars, and the arrangement of the bus bar is limited by the penetration of the bolt. It will not be done.

前記最下層絶縁板の下面側には特定バスバー以外のバスバーを配置していないことが好ましく、前記第１バスバーと第２バスバーを固定するボルトから離れた位置でボルトとの接触を確実に回避できる箇所であれば、最下層絶縁板の下面側に特定バスバー以外のバスバーを配置してもよい。   It is preferable that no bus bar other than the specific bus bar is disposed on the lower surface side of the lowermost insulating plate, and contact with the bolt can be reliably avoided at a position away from the bolt that fixes the first bus bar and the second bus bar. If it is a location, a bus bar other than the specific bus bar may be arranged on the lower surface side of the lowermost insulating plate.

前記第１バスバーあるいは／および第２バスバーを前記積層体を構成するバスバーとボルト締めにより接続する構成とすると、第１バスバーと第２バスバーとをボルト締め固定する作業と、第１、第２バスバーと積層体のバスバーとをボルト締めする作業の少なくとも２つのボルト締め作業が必要となる。しかし、これらボルト締め作業はともにロアケースに積層体を収容してから行うようにしているため、これらボルト締め作業を１つの工程で効率良く行うことができる。
なお、ボルト締め作業は前記に示したものに限らず、第１、第２バスバーとバッテリーに接続された電源線端末の端子との接続や、ヒュージブルリンクの端子との接続に必要なボルト締め作業があってもすべて１つの工程内でボルト締めすることができる。 When the first bus bar and / or the second bus bar is connected to the bus bar constituting the laminate by bolting, the first bus bar and the second bus bar are bolted and fixed, and the first and second bus bars And at least two bolting operations of bolting the bus bar of the laminated body are required. However, since these bolt tightening operations are both performed after the laminated body is accommodated in the lower case, these bolt tightening operations can be efficiently performed in one process.
The bolt tightening operation is not limited to the above-described ones, but the bolt tightening necessary for connecting the first and second bus bars to the terminals of the power line terminals connected to the battery and the terminals of the fusible link. Even if there is work, it can be bolted in one process.

前述したように、本発明によれば、電流センサーの貫通穴に通す第１バスバーと第２バスバーとを下方からボルト締めして上方に配置する積層体の最下層の絶縁板に固定しているため、前記ボルトの頭部が第１、第２バスバーの下面側に配置され、ボルト頭部と積層体の最下層のバスバーとが接触して短絡するのを防止することができる。
また、第１バスバーと第２バスバーとを下方からボルト締めすることにより、第１、第２バスバーの上方に配置する積層体にボルトを貫通させる必要もなく、バスバーの配置がボルトの貫通によって制限されることがなく、絶縁板上のスペースを有効に利用することができる。
さらに、第１バスバーと第２バスバーとのボルト締め作業を、ロアケースに積層体を収容してから行うボルト締め作業と同一工程で行うことができ、ボルト締めの作業性を向上させることができる。 As described above, according to the present invention, the first bus bar and the second bus bar that are passed through the through hole of the current sensor are bolted from below and fixed to the lowermost insulating plate of the laminate that is disposed above. Therefore, the bolt heads are arranged on the lower surface side of the first and second bus bars, and the bolt heads and the bus bar at the lowest layer of the laminate can be prevented from contacting and short-circuiting.
Further, by bolting the first bus bar and the second bus bar from below, there is no need to penetrate the bolt through the laminated body arranged above the first and second bus bars, and the arrangement of the bus bar is limited by the penetration of the bolt. Thus, the space on the insulating plate can be used effectively.
Furthermore, the bolting operation of the first bus bar and the second bus bar can be performed in the same process as the bolting operation performed after the laminated body is accommodated in the lower case, and the workability of the bolting can be improved.

本発明の実施形態を図面を参照して説明する。
図１及び図２は、本発明の実施形態を示し、本発明の車載用電気接続箱の組立方法により組み立てられる電気接続箱１０は、アッパーケース１１とロアケース１２とからなるケース内に、バスバー１３と絶縁板１４とを交互に積層した積層体１５を収容している。前記バスバー１３のうちの特定バスバーは、電流センサー２０の貫通穴２０ａに挿通される第１バスバー２１と、該第１バスバー２１とボルト締め接続される第２バスバー２２とからなる。 Embodiments of the present invention will be described with reference to the drawings.
1 and 2 show an embodiment of the present invention. An electric connection box 10 assembled by the method for assembling an in-vehicle electric connection box according to the present invention includes a bus bar 13 in a case made up of an upper case 11 and a lower case 12. And a laminated body 15 in which insulating plates 14 are alternately laminated is accommodated. The specific bus bar in the bus bar 13 includes a first bus bar 21 inserted through the through hole 20a of the current sensor 20 and a second bus bar 22 connected to the first bus bar 21 by bolting.

電流センサー２０は第１バスバー２１に流れる電流を検知するものであり、第１バスバー２１を挿通する貫通穴２０ａを設けている。また、電流センサー２０の下面側にはコネクタを介して電線が接続され、第１バスバー２１の電流を検知したときに、該電線を介して検知信号をエンジンコントロールユニット（図示せず）に伝達する構成としている。   The current sensor 20 detects a current flowing through the first bus bar 21 and is provided with a through hole 20 a through which the first bus bar 21 is inserted. In addition, an electric wire is connected to the lower surface side of the current sensor 20 via a connector, and when a current of the first bus bar 21 is detected, a detection signal is transmitted to the engine control unit (not shown) via the electric wire. It is configured.

導電性金属板を所要形状に打ち抜いて折り曲げ加工した第１バスバー２１は、一端を水平方向に屈曲した下端屈曲部２１ａと、他端を水平方向に屈曲した上端屈曲部２１ｂとを備えている。下端屈曲部２１ａは、電流センサー２０の貫通穴２０ａに貫通され、貫通した突出側を第２バスバー２２との接続部とし、該接続部にボルト穴２１ｃを設けている。一方、上端屈曲部２１ｂには、バッテリーと接続した電源線端末の端子（図示せず）と接続する接続部２１ｄとヒュージブルリンクの入力端子と接続する接続部２１ｅを設け、これら接続部２１ｄ、２１ｅにそれぞれボルト穴２１ｆ、２１ｇを設けている。   The first bus bar 21 obtained by punching and bending a conductive metal plate into a required shape includes a lower end bent portion 21a having one end bent in the horizontal direction, and an upper end bent portion 21b having the other end bent in the horizontal direction. The lower end bent portion 21a is penetrated through the through hole 20a of the current sensor 20, the projecting side penetrating through is used as a connection portion with the second bus bar 22, and a bolt hole 21c is provided in the connection portion. On the other hand, the upper bent portion 21b is provided with a connection portion 21d connected to a terminal (not shown) of a power line terminal connected to the battery and a connection portion 21e connected to an input terminal of the fusible link. Bolt holes 21f and 21g are provided in 21e, respectively.

第１バスバー２１とボルト締め接続する第２バスバー２２は、一端を水平方向に屈曲した下端屈曲部２２ａと、２つに分岐した他端を水平方向に屈曲した上端屈曲部２２ｂ、２２ｃとを備えている。下端屈曲部２２ａの先端部を第１バスバー２１との接続部とし、該接続部にボルト穴２２ｄを設けている。一方の上端屈曲部２２ｂはヒュージブルリンクとの接続部としてボルト穴２２ｅを設けており、他方の上端屈曲部２２ｃはバスバー１３との接続部としてボルト穴２２ｆを設けている。
前記第１、第２バスバー２１、２２の下端屈曲部２１ａ、２２ａのボルト穴２１ｃ、２２ｄを設けた先端部を第１バスバー２１と第２バスバー２２の重ね合わせ部としている。 The second bus bar 22 that is bolted to the first bus bar 21 includes a lower end bent portion 22a having one end bent in the horizontal direction and upper end bent portions 22b and 22c bent the other end branched in two in the horizontal direction. ing. The tip of the lower end bent portion 22a is a connection portion with the first bus bar 21, and a bolt hole 22d is provided in the connection portion. One upper end bent portion 22 b is provided with a bolt hole 22 e as a connection portion with the fusible link, and the other upper end bent portion 22 c is provided with a bolt hole 22 f as a connection portion with the bus bar 13.
The front ends of the first and second bus bars 21, 22 provided with the bolt holes 21 c, 22 d of the lower bent portions 21 a, 22 a are overlapped portions of the first bus bar 21 and the second bus bar 22.

積層体１５の最下層の絶縁板１４Ａには、図２に示すように、特定バスバー（第１、第２バスバー２１、２２）以外のバスバー１３は上面側にのみ配置しており、最下層絶縁板１４Ａ上のバスバーを最下層バスバー１３Ａとしている。最下層絶縁板１４Ａの下面側には四角筒状のナットの埋設部１６を下方に向けて突出させて設けており、該埋設部１６内に外形が四角形状のナットＮを圧入固定している。
また、バスバー１３には複数のタブを設けており、積層体１５から上方に向けて突出するタブ１３ａはアッパーケース１１に搭載したヒューズ、リレー（図示せず）の端子と接続する一方、積層体１５から下方に向けて突出するタブ（図示せず）はロアケース１２に搭載したコネクタ内の端子と接続している。
さらに、図１に示すように、積層体１５の側面から上方に向けて２本のバスバーを突出させており、共に上端を水平方向に屈曲させている。２本のバスバーのうち、一方の屈曲部を第２バスバー２２との接続部１３ｂとしてボルト穴１３ｃを設け、他方の屈曲部をヒュージブルリンクとの接続部１３ｄとしてボルト穴１３ｅを設けている。 As shown in FIG. 2, the bus bar 13 other than the specific bus bar (first and second bus bars 21 and 22) is disposed only on the upper surface side of the insulating plate 14 </ b> A of the lowermost layer of the laminated body 15, and the lowermost layer insulation is provided. The bus bar on the plate 14A is the lowermost bus bar 13A. On the lower surface side of the lowermost insulating plate 14A, a rectangular tubular nut embedded portion 16 is provided so as to protrude downward, and a nut N having a rectangular outer shape is press-fitted and fixed in the embedded portion 16. .
The bus bar 13 is provided with a plurality of tabs, and the tab 13a protruding upward from the laminate 15 is connected to terminals of fuses and relays (not shown) mounted on the upper case 11, while the laminate is provided. A tab (not shown) protruding downward from 15 is connected to a terminal in a connector mounted on the lower case 12.
Furthermore, as shown in FIG. 1, two bus bars are protruded upward from the side surface of the laminate 15, and both upper ends are bent in the horizontal direction. Among the two bus bars, one bent portion is provided as a connecting portion 13b with the second bus bar 22, and a bolt hole 13c is provided. The other bent portion is provided as a connecting portion 13d with a fusible link, and a bolt hole 13e is provided.

ロアケース１２の底壁の所要箇所には、電流センサー取付部１２ａを設けると共に、該電流センサー取付部１２ａの近傍に第１バスバー２１と第２バスバー２２を接続するボルトＢをロアケース１２の下面側から通す取付穴１２ｂを設けている。また、ロアケース１２には、第１バスバー２１と電源線端末の端子とを接続するボルト締め接続部１２ｃ、第２バスバー２２とバスバー１３の接続部１３ｂとを接続するボルト締め接続部１２ｄ、第１ヒュージブルリンク搭載部１２ｅ、第２ヒュージブルリンク搭載部１２ｆを設けている。   A current sensor mounting portion 12 a is provided at a required location on the bottom wall of the lower case 12, and a bolt B connecting the first bus bar 21 and the second bus bar 22 is provided near the current sensor mounting portion 12 a from the lower surface side of the lower case 12. A mounting hole 12b is provided. Further, the lower case 12 has a bolt tightening connection portion 12c for connecting the first bus bar 21 and the terminal of the power line terminal, a bolt tightening connection portion 12d for connecting the second bus bar 22 and the connection portion 13b of the bus bar 13, and the first A fusible link mounting portion 12e and a second fusible link mounting portion 12f are provided.

組立方法を説明すると、ロアケース１２内に、第１バスバー２１の下端屈曲部２１ａを挿通させた電流センサー２０、第２バスバー２２、積層体１５を順に収容し、図２に示すように、最下層絶縁板１４Ａとロアケース１２との間の空間Ｓに第１バスバー２１の下端屈曲部２１ａと第２バスバー２２の下端屈曲部２２ａとが重ね合わされた状態で配置する。詳細には、ロアケース１２の取付穴１２ｂ、第１バスバー２１のボルト穴２１ｃ、第２バスバー２２のボルト穴２２ｄ、最下層絶縁板１４Ａに設けた埋設部１６内のナットＮが上下方向に対応する位置に配置される。この状態でロアケース１２の下面側から各取付穴１２ｂ、ボルト穴２１ｃ、２２ｄにボルトＢを通し、ナットＮに螺合させて、第１、第２バスバー２１、２２を最下層絶縁板１４Ａにボルト締め固定している。このときボルトＢのボルト頭部Ｂ１はロアケース１２の外部に配置されている。   The assembly method will be described. In the lower case 12, the current sensor 20, the second bus bar 22, and the laminate 15 in which the lower end bent portion 21a of the first bus bar 21 is inserted are accommodated in order, and as shown in FIG. The lower end bent portion 21a of the first bus bar 21 and the lower end bent portion 22a of the second bus bar 22 are arranged in a space S between the insulating plate 14A and the lower case 12 in a superimposed manner. Specifically, the mounting hole 12b of the lower case 12, the bolt hole 21c of the first bus bar 21, the bolt hole 22d of the second bus bar 22, and the nut N in the embedded portion 16 provided in the lowermost insulating plate 14A correspond to the vertical direction. Placed in position. In this state, the bolts B are passed through the mounting holes 12b and the bolt holes 21c and 22d from the lower surface side of the lower case 12, and screwed into the nuts N, so that the first and second bus bars 21 and 22 are bolted to the lowermost insulating plate 14A. Tighten and fix. At this time, the bolt head B <b> 1 of the bolt B is disposed outside the lower case 12.

また、第１バスバー２１は、接続部２１ｄを電源線端末の端子と、接続部２１ｅを第１ヒュージブルリンク搭載部１２ｅに搭載したヒュージブルリンク（図示せず）の入力端子とそれぞれロアケース１２の所要箇所でボルト締め固定して接続している。
さらに、第２バスバー２２は、上端屈曲部２２ｂを第２ヒュージブルリンク搭載部１２ｆに搭載したヒュージブルリンク（図示せず）の入力端子と、上端屈曲部２２ｃをバスバー１３の接続部１３ｂとそれぞれロアケース１２の所要箇所でボルト締め固定して接続している。
さらにまた、バスバー１３の接続部１３ｄと第１ヒュージブルリンク搭載部１２ｅに搭載したヒュージブルリンクの出力端子とをロアケース１２の所要箇所でボルト締め固定して接続している。 Further, the first bus bar 21 has a connection portion 21d as a terminal of the power line terminal, a connection portion 21e as an input terminal of a fusible link (not shown) mounted on the first fusible link mounting portion 12e, and a lower case 12 respectively. The bolts are fastened and connected at the required locations.
Further, the second bus bar 22 includes an input terminal of a fusible link (not shown) in which the upper end bent portion 22b is mounted on the second fusible link mounting portion 12f, and the upper end bent portion 22c is connected to the connecting portion 13b of the bus bar 13. Bolts are fastened and connected at the required locations of the lower case 12.
Furthermore, the connection portion 13d of the bus bar 13 and the output terminal of the fusible link mounted on the first fusible link mounting portion 12e are connected by bolting and fixing at a required portion of the lower case 12.

前記構成によれば、電流センサー２０の貫通穴２０ａに通す第１バスバー２１と第２バスバー２２とを下方からボルト締めして上方に配置する積層体１５の最下層絶縁板１４Ａに固定しているため、ボルト頭部Ｂ１が第１、第２バスバー２１、２２の下面側に配置され、ボルト頭部Ｂ１と最下層バスバー１３Ａとが接触して短絡するのを防止することができる。
また、第１バスバー２１と第２バスバー２２とを下方からボルト締めすることにより、第１、第２バスバー２１、２２の上方に配置する積層体１５にボルトＢを貫通させる必要もなく、バスバー１３の配置がボルトＢの貫通によって制限されることがなく、絶縁板１４上のスペースを有効に利用することができる。
さらに、第１バスバー２１と第２バスバー２２とのボルト締め作業を、ロアケース１２に積層体１５を収容してから行う複数のボルト締め作業と同一工程で行うことができ、ボルト締めの作業性を向上させることができる。 According to the above configuration, the first bus bar 21 and the second bus bar 22 that are passed through the through hole 20a of the current sensor 20 are bolted from below and fixed to the lowermost insulating plate 14A of the laminated body 15 disposed above. Therefore, the bolt head B1 can be disposed on the lower surface side of the first and second bus bars 21 and 22, and the bolt head B1 and the lowermost bus bar 13A can be prevented from contacting and short-circuiting.
Further, by bolting the first bus bar 21 and the second bus bar 22 from below, there is no need to penetrate the bolt B through the laminated body 15 disposed above the first and second bus bars 21, 22, and the bus bar 13 Is not limited by the penetration of the bolt B, and the space on the insulating plate 14 can be used effectively.
Furthermore, the bolting operation of the first bus bar 21 and the second bus bar 22 can be performed in the same process as a plurality of bolting operations performed after the laminated body 15 is accommodated in the lower case 12. Can be improved.

本発明の実施形態で組み立てられた電気接続箱の分解斜視図である。It is a disassembled perspective view of the electrical junction box assembled in the embodiment of the present invention. 第１バスバーと第２バスバーを絶縁板にボルト締め固定している状態を示す断面図である。It is sectional drawing which shows the state which has bolted and fixed the 1st bus bar and the 2nd bus bar to the insulating board. 従来例を示す図面である。It is drawing which shows a prior art example. 従来例の問題点を示す図面である。It is drawing which shows the problem of a prior art example.

符号の説明Explanation of symbols

１０ 電気接続箱
１１ アッパーケース
１２ ロアケース
１３ バスバー
１３Ａ 最下層バスバー
１４ 絶縁板
１４Ａ 最下層絶縁板
１５ 積層体
１６ ナットの埋設部
２０ 電流センサー
２０ａ 貫通穴
２１ 第１バスバー
２１ａ 下端屈曲部
２１ｃ ボルト穴
２２ 第２バスバー
２２ａ 下端屈曲部
２２ｄ ボルト穴
Ｂ ボルト
Ｂ１ ボルト頭部
Ｎ ナット DESCRIPTION OF SYMBOLS 10 Electrical junction box 11 Upper case 12 Lower case 13 Bus bar 13A Bottom layer bus bar 14 Insulation plate 14A Bottom layer insulation plate 15 Laminate body 16 Nut buried part 20 Current sensor 20a Through hole 21 First bus bar 21a Lower end bent part 21c Bolt hole 22 2 bus bar 22a lower end bent part 22d bolt hole B bolt B1 bolt head N nut

Claims (2)

アッパーケースとロアケースとからなるケース内にバスバーと絶縁板とが交互に積層された積層体が収容されていると共に、前記積層体のバスバーとボルト締めで連結する第１バスバーと第２バスバーとからなる特定バスバーを設け、前記第１バスバーに電流センサーが取り付けられる車載用電気接続箱の組立方法であって、
前記電流センサーの貫通穴に前記第１バスバーを貫通させた電流センサーを、前記ロアケースの底壁に設けられた電流センサー取付部に取り付けた後、
前記第１バスバーに前記第２バスバーを重ね合わせて前記第１バスバーと前記第２バスバーとの接続部を形成し、
さらに、前記第１バスバーと前記第２バスバーとの接続部の上方に前記積層体を配置して、前記ロアケース底壁に設けられたボルト取付穴にボルトを下方から挿入させ、該ボルトを前記第１バスバーと前記第２バスバーとの接続部を通して、前記積層体の最下層の絶縁板の下面側に下向きに突設されたナット埋設部のナットと締結固定させることを特徴とする車載用電気接続箱の組立方法。 A laminated body in which bus bars and insulating plates are alternately laminated is accommodated in a case composed of an upper case and a lower case, and from the first bus bar and the second bus bar that are connected to the laminated bus bar by bolting. An assembly method of an on-vehicle electrical junction box in which a specific bus bar is provided and a current sensor is attached to the first bus bar,
After attaching the current sensor having the first bus bar penetrated through the through hole of the current sensor to the current sensor mounting portion provided on the bottom wall of the lower case,
Forming a connection portion between the first bus bar and the second bus bar by overlaying the second bus bar on the first bus bar;
Further, the laminated body is disposed above a connection portion between the first bus bar and the second bus bar, and a bolt is inserted from below into a bolt mounting hole provided in the bottom wall of the lower case, and the bolt is inserted into the first bus bar. An in-vehicle electrical connection characterized by being fastened and fixed to a nut embedded in a nut embedded portion projecting downward on the lower surface side of the lowermost insulating plate of the laminated body through a connection portion between one bus bar and the second bus bar How to assemble the box. 前記第１バスバーおよび前記第２バスバーとして両端に上端屈曲部と下端屈曲部とを有するバスバーを用い、前記第１バスバーの下端屈曲部を前記電流センサーの貫通穴に貫通させ、その先端を前記第２バスバーの下端屈曲部に重ね合わせ、該重ね合わせ部に設けられているボルト穴に前記ボルトを挿通して前記ナットで締結し、かつ、前記第１バスバーと前記第２バスバーの上端屈曲部をヒュージブルリンクと導通させる請求項１に記載の車載用電気接続箱の組立方法。   A bus bar having an upper end bent portion and a lower end bent portion at both ends is used as the first bus bar and the second bus bar, the lower end bent portion of the first bus bar is passed through the through hole of the current sensor, and the tip thereof is the first bus bar. 2 Overlap the lower bent portion of the bus bar, insert the bolt into the bolt hole provided in the overlap portion, fasten with the nut, and connect the upper bent portion of the first bus bar and the second bus bar. The method for assembling an on-vehicle electrical junction box according to claim 1, wherein the electrical connection box is electrically connected to the fusible link.
JP2006214851A 2006-08-07 2006-08-07 Assembly method for in-vehicle electrical junction box Expired - Fee Related JP4140643B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011223775A (en) * 2010-04-12 2011-11-04 Toyota Industries Corp Electric apparatus
US8237535B2 (en) 2010-04-16 2012-08-07 World Properties, Inc. Integral planar transformer and busbar
JP2021097504A (en) * 2019-12-17 2021-06-24 住友電装株式会社 Electric connection box
JP2022143600A (en) * 2021-03-18 2022-10-03 矢崎総業株式会社 Electric connection box

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011223775A (en) * 2010-04-12 2011-11-04 Toyota Industries Corp Electric apparatus
US8237535B2 (en) 2010-04-16 2012-08-07 World Properties, Inc. Integral planar transformer and busbar
JP2021097504A (en) * 2019-12-17 2021-06-24 住友電装株式会社 Electric connection box
WO2021124841A1 (en) * 2019-12-17 2021-06-24 住友電装株式会社 Junction box
JP2022143600A (en) * 2021-03-18 2022-10-03 矢崎総業株式会社 Electric connection box
JP7314190B2 (en) 2021-03-18 2023-07-25 矢崎総業株式会社 electric junction box

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