WO2010007832A1 - 電気接続箱の端子装着構造 - Google Patents

電気接続箱の端子装着構造 Download PDF

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Publication number
WO2010007832A1
WO2010007832A1 PCT/JP2009/059970 JP2009059970W WO2010007832A1 WO 2010007832 A1 WO2010007832 A1 WO 2010007832A1 JP 2009059970 W JP2009059970 W JP 2009059970W WO 2010007832 A1 WO2010007832 A1 WO 2010007832A1
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WO
WIPO (PCT)
Prior art keywords
terminal
plate portion
bolt
junction box
pair
Prior art date
Application number
PCT/JP2009/059970
Other languages
English (en)
French (fr)
Inventor
正裕 赤堀
雅利 江川
洋行 若松
陽介 岡本
誠 須野原
政広 小室
Original Assignee
トヨタ車体株式会社
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 トヨタ車体株式会社 filed Critical トヨタ車体株式会社
Priority to CN200980107251.7A priority Critical patent/CN101960685B/zh
Priority to US12/866,816 priority patent/US7914300B2/en
Priority to EP09797760.7A priority patent/EP2302750B1/en
Priority to CA2715523A priority patent/CA2715523C/en
Publication of WO2010007832A1 publication Critical patent/WO2010007832A1/ja

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/04—Arrangement of batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
    • B60R16/0238—Electrical distribution centers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R11/00—Individual connecting elements providing two or more spaced connecting locations for conductive members which are, or may be, thereby interconnected, e.g. end pieces for wires or cables supported by the wire or cable and having means for facilitating electrical connection to some other wire, terminal, or conductive member, blocks of binding posts
    • H01R11/11—End pieces or tapping pieces for wires, supported by the wire and for facilitating electrical connection to some other wire, terminal or conductive member
    • H01R11/12—End pieces terminating in an eye, hook, or fork
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/305—Clamped connections, spring connections utilising a screw or nut clamping member having means for facilitating engagement of conductive member or for holding it in position
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/28—Clamped connections, spring connections
    • H01R4/30—Clamped connections, spring connections utilising a screw or nut clamping member
    • H01R4/34—Conductive members located under head of screw

Definitions

  • the present invention relates to a terminal mounting structure for an electric connection box in which a terminal with an electric wire for power supply or the like is fastened and connected to a bus bar of the electric connection box with a bolt.
  • FIG. 7 (a) and 7 (b) show one form of a conventional terminal mounting structure for an electrical junction box (see, for example, Patent Documents 1 and 2 as a similar example).
  • a so-called diagonal tightening prevention terminal 51 made of a conductive metal bent in a substantially crank shape when viewed from the side is fastened and connected to a conductive metal plate-like bus bar 44 of an electrical connection box (relay block) 42 with bolts 45. is there.
  • the electric connection box 42 is mounted on the automobile.
  • the terminal 51 has a rectangular opening 52 through which the head of the bolt 45 is inserted in the upward vertical plate portion 53, and the opening 52 communicates with the U-shaped cutout hole 56 from the opening 55 of the horizontal plate portion 54, The shaft portion of the bolt 45 is inserted into the notch hole 56.
  • the horizontal flat plate portion 54 is connected to the wire connecting plate portion 57 facing downward, and a pair of left and right crimping pieces 57a (not shown) of the connecting plate portion 57 are crimped and connected to the conductor portion of the power supply electric wire 58.
  • a pair of left and right crimping pieces 57 b having a narrow width on the side are crimped and fixed to the insulating coating of the electric wire 58.
  • Reinforcing ribs are raised and formed on both side edges of the plate portions 53, 54, and 57.
  • the electrical connection box 42 includes a connection box main body 43 made of insulating resin, a bus bar 44 routed along the connection box main body 43, and a bolt of a horizontal plate portion (represented by reference numeral 44) of the bus bar 44 in the connection box main body.
  • a nut (not shown) disposed below the insertion hole and screwed into the shaft portion of the bolt 45; a pair of partition walls 46 raised integrally from the connection box body 43 on both sides of the horizontal plate portion;
  • a vertical wall portion 47 on the back side that forms a U-shaped peripheral wall in a plan view by connecting a pair of partition walls 46, and a flexible terminal locking portion 48 disposed in front of the wall portion 47, It has.
  • reference numeral 44a indicates a vertical portion of the bus bar 44 for connecting a booster cable (not shown) when the battery is exhausted.
  • Two terminals 51 connected to the battery and one connected to the alternator are arranged in parallel, and the bus bar 44 is connected to both terminals 51.
  • JP 2006-4733 A Japanese Patent Laid-Open No. 11-213855
  • the wire connection portion of the terminal may be loosened by crimping. In this case, the contact resistance between the terminal and the electric wire is increased, and the terminal is further heated. At the same time, there was a concern that the reliability of the electric wire connection would be reduced.
  • the present invention has a structure in which a terminal for power supply or the like is screwed and connected to an electrical connection box, and can be smoothly assembled even if the insertion direction of the terminal is oblique, In addition, it is possible to suppress the heat generation of the terminals due to power supply, etc., and improve the reliability of connection with electric wires, etc., and generally improve the mounting performance of so-called diagonal tightening prevention terminals in the electrical connection box.
  • An object of the present invention is to provide a terminal mounting structure for an electrical junction box.
  • a terminal mounting structure for an electrical junction box is such that a terminal is fastened and connected to a bus bar of the electrical junction box with a bolt, and the terminal is inserted through the bolt head.
  • Terminal connection structure of an electrical connection box having a continuous opening and a horizontal cutout hole for inserting a bolt shaft portion, and a pair of guide walls are provided opposite to the connection box body on both sides of the bolt.
  • the guide wall has an inclined surface on the inlet side inclined from top to bottom and a straight horizontal plane following the inclined surface, and the terminals are in slidable contact with the inclined surface and the horizontal plane in sequence. It has an outward projecting piece.
  • the pair of projecting pieces of the terminals are slidably guided downward along the inclined surface on the entrance side of the pair of guide walls, Next, the pair of projecting pieces are slidably guided horizontally along a straight horizontal plane.
  • the pair of projecting pieces also perform the function of radiating the heat of the terminals to the outside.
  • the terminal mounting structure for an electrical connection box according to claim 2 is the terminal mounting structure for an electrical connection box according to claim 1, wherein a heat radiating plate is integrally extended above the vertical plate having the vertical opening of the terminal.
  • a plurality of linear irregularities are formed on the front and back surfaces of the heat radiating plate portion, and both the front and back surfaces of the heat radiating plate portion are exposed to the outside.
  • the terminal when the terminal is energized for power supply or the like, for example, the terminal is heated to cause adverse effects on the terminal wire connection part, etc. Radiated from the outside to the outside, and a plurality of linear irregularities on the front and back sides of the heat radiating plate portion increase the surface area of the heat radiating plate portion to promote the heat radiating effect.
  • the pair of projecting pieces also perform the function of radiating the heat of the terminals to the outside.
  • the terminal is obliquely upward in the pair of guide walls.
  • the pair of projecting pieces of the terminal is smoothly inserted along the straight horizontal surface on the back side from the inclined surface on the inlet side of the pair of guide walls. Can be performed smoothly, easily and reliably.
  • the mounting performance of what is called a diagonal fastening prevention terminal in an electrical junction box can be improved.
  • the pair of projecting pieces radiate the heat of the terminal to the outside, for example, loosening of the wire crimping portion of the terminal is prevented, and the reliability of electrical connection with the wire and the reliability of power supply are improved.
  • heat generated in the terminal for supplying power is radiated to the outside from both the front and back surfaces of the heat radiating plate portion, and the plurality of linear irregularities on both the front and back surfaces increase the surface area of both the front and back surfaces. Since the heat dissipation effect is promoted, the heat of the terminal is reduced, for example, loosening of the wire crimping portion of the terminal is prevented, and the reliability of electrical connection with the wire and the reliability of power supply are improved. Thereby, the mounting performance of what is called a diagonal fastening prevention terminal in an electrical junction box can be improved. It goes without saying that the above effect is promoted by the pair of projecting pieces dissipating the heat of the terminals to the outside.
  • FIG. 1A and 1B show an embodiment of a terminal mounting structure of a conventional electrical connection box, in which FIG. 1A is an exploded perspective view before terminal assembly, and FIG. 2B is a perspective view after terminal assembly.
  • FIG. 1 to 4 show a first embodiment of a terminal mounting structure for an electrical junction box according to the present invention.
  • a pair of horizontal protrusions 3 are integrally formed on both sides of the horizontal plate portion 2 of the terminal 1, and the insulating resin of the electrical junction box 5 is formed as shown in FIGS.
  • a guide portion 7 for guiding the pair of projecting pieces 3 of the terminal 1 obliquely downward is integrally formed on the junction box body 6 made of the product.
  • the terminal 1 is shown larger than the actual size of the electrical connection box 5 for convenience of explanation.
  • the terminal 1 includes a vertical plate portion 4 having a rectangular vertical wide opening 8 for inserting a bolt head portion, and a horizontal wide opening 9 extending perpendicularly to the lower side of the vertical plate portion 4 and continuing to the opening 8. And a horizontal plate portion 2 having a narrow horizontal substantially U-shaped cutout hole 11 continuing to the opening 9 via the inclined portion 10, and a wire connecting portion (which is orthogonal to the lower side of the horizontal plate portion 2 ( Electric wire crimping portion) 12.
  • the vertical plate portion 4 is composed of an upper horizontal connecting portion 4a, right and left rising portions 4b, and ribs 4c bent at right angles to the rear from each rising portion 4b. It is comprised as a character-like frame-shaped part (4).
  • the horizontal plate portion 2 includes a narrow plate portion 2a located on both sides of the wide opening 9, a wide plate portion (U-shaped portion) 2b located on both sides and the rear of the notch hole 11, and a narrow plate portion 2a.
  • a pair of projecting pieces 3 projecting in a fin shape at the outer end and a rib 2c raised from the outer edge of the wide plate portion 2b are provided.
  • the projecting piece 3 is composed of a support portion 3a that is shortly or substantially vertically raised from the narrow plate portion 2a, and a main body portion 3b that is substantially rectangular in plan view and extends horizontally from the support portion 3a.
  • a curved inclined portion 3c is formed at the front end of the portion.
  • the protruding piece 3 is disposed slightly lower than the rib 2c.
  • the rib 3 of the horizontal plate 2 is located with the gap 13 at the lower rear end of the rib 4 c of the vertical plate 4 and the front end 3 c of the protruding piece 3 with a slight gap 14 at the rear end of the protruding piece 3.
  • the front end of 2c is located.
  • the ribs 2 c of the horizontal plate portion 2 continue to hang down on both sides of the wire connecting portion 12, and the pair of left and right crimping pieces 12 a on the upper side of the wire connecting portion 12 serve as the conductor portion of the electric wire 15 for power supply or the like.
  • the pair of crimping pieces 12 b on the lower side is crimped and fixed to the insulation coating of the electric wire 15 by crimping.
  • the front-rear and left-right directions are for convenience of explanation.
  • the junction box body 6 of this example is an intermediate frame in the height direction, and includes an upper cover (not shown) that covers the upper opening of the frame 6 and a lower cover 16 that covers the lower opening of the frame 6. I have.
  • a guide portion 7 for guiding the terminal 1 obliquely downward is integrally formed on the upper portion of the frame 6.
  • the guide portion 7 is integrally formed in a substantially bowl shape along a pair of left and right vertical wall portions 17 and the inner surfaces of the pair of wall portions 17.
  • the guide wall 18 is formed by a guide rail-shaped guide wall 18 that forms a thick portion together with the pair of wall portions 17 and a front (back side) vertical wall portion 19 that connects the pair of left and right wall portions 17.
  • the left and right vertical wall portions 17 may open left and right on the lower side of the guide wall 18.
  • the inclined surface 18a is formed on the lower end surface of the rear half of the guide wall 18 in the range from the rear entrance of the guide portion 7 to both sides of the bolt 20, and the straight lower end surface of the first half of the guide wall 18 is formed. It continues to the horizontal plane (guide surface) 18b.
  • the vertical distance H between the upper surface of the horizontal portion (represented by reference numeral 21) of the bus bar 21 disposed on the bottom surface of the guide portion 7 and the horizontal guide surface 18b of the guide wall 18 is greater than the height of the protruding piece 3 of the terminal 1. Is also set slightly larger.
  • a bolt 20 is inserted downward into a hole 21 a in the horizontal portion of the bus bar 21 and temporarily fixed to a lower nut (not shown) in the frame 6.
  • the terminal 1 is inserted toward the rear opening 22 of the guide portion 7 of the frame 6 in a state where the terminal 1 is inclined downward.
  • the upper surface of the pair of left and right projecting pieces 3 of the terminal 1 smoothly slides along the inclined surface 18a on the entrance side of the pair of guide walls 18, and the terminal 1 is inclined downwardly in the guide portion 7. Inserted into.
  • the inclined surface 3c at the front end of the protruding piece 3 is smoothly inserted along the inclined surface 18a of the guide wall 18 without being caught.
  • the terminal 1 is automatically inserted into the guide portion 7 horizontally while the upper surface of the protruding piece 3 advances from the inclined surface 18a of the guide wall 18 along the straight horizontal surface 18b.
  • the terminal 1 is inserted horizontally up to the back (front end) of the guide portion 7, and at the same time the vertical plate portion 4 of the terminal 1 contacts the vertical wall portion 19 on the back side. It is locked by a flexible locking portion 23 on the front side of the wall portion 19.
  • the inclined surface 3c at the front end of the projecting piece 3 passes smoothly through the curved intersection 18c between the inclined surface 18a of the guide wall 18 and the horizontal surface 18b.
  • the locking portion 23 is the same as that of the conventional example of FIG. 7, and includes a support plate portion 23a suspended in the center of the back wall portion 19 and flexible plates formed on both left and right sides of the support plate portion 23a. It is comprised with the arm-shaped nail
  • the locking portion 23 is inserted together with the head of the bolt 20 from the front opening 8 (FIG. 1) of the terminal 1, and the claw portion 23b locks the rising portions 4b (FIG. 1) on both the left and right sides of the vertical plate portion 4. .
  • the bolt 20 is finally tightened, and the horizontal plate portion 2 of the terminal 1 is tightly connected to the lower bus bar 21.
  • the bus bar 21 is bent in the frame 6 and is connected to, for example, a fuse, a relay, a terminal in a connector (not shown) or the like (not shown) mounted on the upper part of the frame and supplies power.
  • the guide in the guide portion 7 is provided.
  • the terminal 1 can be smoothly and reliably inserted with good workability along the inclined surface 18a of the wall 18 and the subsequent horizontal surface 18b.
  • the pair of projecting pieces 3 of the terminal 1 radiates the heat of the terminal 1 to the outside, thereby preventing, for example, loosening of the wire crimping portion 12 of the terminal 1, and reliability of electrical connection with the wire 15. The reliability of power supply can be improved.
  • 5 to 6 show a second embodiment of the terminal mounting structure of the electrical junction box according to the present invention.
  • This structure is similar to the embodiment shown in FIGS. 1 to 4 in the terminal mounting structure of the electrical junction box, and the vertical plate portion 32 of the terminal 31 is extended upward to form the heat radiating plate portion 33.
  • a plurality of linear projections and depressions 34 are formed on both the front and back surfaces to increase the surface area, thereby enhancing the heat dissipation effect of the heat radiating plate portion 33.
  • the terminal 31 of this example is formed integrally with a vertical plate portion 32 having a rectangular wide opening 35 for inserting a bolt head portion and the vertical plate portion 32.
  • the heat dissipating plate portion 33 which extends perpendicularly to the lower side of the vertical plate portion 32, has a wide opening 36 which continues to the opening 35, and a narrow, substantially U-shaped notch hole which continues to the opening 36 via an inclined portion 37. 38, a pair of projecting pieces 30 protruding horizontally on the left and right sides of the horizontal plate portion 9, and an electric wire connecting portion (electric wire crimping portion) extending perpendicularly to the lower side of the horizontal plate portion 39. 40).
  • the vertical plate portion 32 includes a heat radiating plate portion 33 that is a plate-like connecting portion extended upward, a left and right rising portions 32 a that are integrally formed below the heat radiating plate portion 33, and a heat radiating plate portion 33.
  • Each of the rising portions 32a is configured as a substantially U-shaped frame portion with ribs 32b bent at a right angle to the rear.
  • the horizontal flat plate portion 39 includes a narrow plate portion 39a located on both sides of the wide opening 36, a wide plate portion (U-shaped portion) 39b located on both sides and the rear of the notch hole 38, and an outer side of the wide plate portion 39b.
  • a rib 39c raised at the edge and protrusions 30 on both the left and right sides are provided.
  • the ribs 39c of the horizontal plate portion 39 continue to hang down on both sides of the wire connecting portion 40, and the pair of left and right crimping pieces 40a on the upper side of the wire connecting portion 40 are crimped and connected to the conductor portion of the electric wire 41 for power supply, etc.
  • a pair of left and right crimping pieces 40 b on the lower side are fixed to the insulation coating of the electric wire 41 by crimping.
  • a fine groove 34a in the horizontal direction is formed in the vertical connecting plate portion 33 and the ribs 32b on both sides thereof in parallel in a vertical section sawtooth shape or screw shape at equal pitches in the vertical direction, thereby forming a fine line-shaped unevenness 34.
  • the unevenness 34 is easily formed by strongly pressing the vertical plate portion 32 with the corrugated unevenness (not shown) of the press mold in a developed state of the terminal 31 (a state where the terminal 31 is punched out from the conductive metal plate). Is possible.
  • the electrical connection box 42 is substantially the same as in the embodiment of FIGS. 1 to 4, and includes a connection box main body 43 made of insulating resin, and a bus bar arranged along the connection box main body 43. 44, a nut (not shown) that is disposed below the bolt insertion hole of the horizontal plate portion (represented by reference numeral 44) of the bus bar 44 in the junction box body, and is screwed into the shaft portion of the bolt 45, and the horizontal plate
  • a pair of vertical wall portions 46 integrally raised from the junction box main body 43 on both sides of the portion 39, a guide wall 49 integrally provided inside the pair of wall portions 46, and the pair of wall portions 46 are coupled.
  • the wall 46 and the guide wall 49 are extended higher than the vertical wall 47 that forms a U-shaped peripheral wall in plan view, and the wall 47 is disposed in front of the vertical wall 47.
  • a flexible terminal locking portion 48 is provided higher than the vertical wall 47 that forms a U-shaped peripheral wall in plan view.
  • the vertical support plate 48 a of the locking portion 48 is engaged with the notch slot 32 c of the vertical plate portion 32 of the terminal 31 to position the vertical plate portion 32.
  • the pair of left and right projecting pieces 30 of the terminal 31 are guided and inserted along the curved surface on the inlet side of the guide wall 49 and are positioned along the horizontal plane on the back side.
  • the terminal 31 is horizontally inserted below the pair of guide walls 49, and the vertical plate portion 32 of the terminal 31 is in contact with the back wall portion 47, and the heat radiating plate portion on the upper side of the vertical plate portion 32. 33 protrudes higher than the wall part 47 on the back side and is exposed to the outside. Then, the heat of the terminal 31 for connecting the power source or the like is radiated from the heat radiating plate 33 to the outside air as indicated by the arrow B, and the heat of the terminal 31 moves toward the heat radiating plate 33 as indicated by the arrow C. 31 heat goes down. The linear unevenness 34 of the heat radiating plate portion 33 promotes this cooling action. Further, the pair of left and right projecting pieces 30 of the terminal 31 dissipate the heat of the terminal 31 and promote the cooling action thereof.
  • the terminal 31 is fastened and connected to the bus bar 44 with the bolt 45, and the heat generated in the terminal 31 by energization can be efficiently released from the heat radiating plate 33 to the outside of the terminal. Furthermore, this effect can be promoted by the unevenness 34 of the heat radiating plate portion 33 to suppress the heat generation of the terminal 31 and to increase the value of the energization current to the terminal 31. And by the effect
  • the present invention is a structure in which a terminal for power supply etc. is screwed and connected to an electrical connection box, and even if the insertion direction of the terminal is oblique, it is assembled smoothly, and in addition, a terminal resulting from power supply etc. This can be used to suppress the heat generation of the wire, increase the reliability of the connection with the electric wire or the like, and generally improve the mounting performance of the so-called diagonal fastening prevention terminal in the electrical connection box.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Or Junction Boxes (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)

Abstract

　電気接続箱に端子をねじ締め接続する構造で、端子の挿入方向が斜めでもスムーズに組付を行い、しかも電源供給等に起因する端子の発熱を抑えるために、電気接続箱５のバスバー２１に端子１をボルト２０で締付接続し、端子がボルト頭部を挿通する垂直な開口８と、ボルト軸部を挿入する水平な切欠孔１１とを連通して有する電気接続箱の端子装着構造で、ボルトの両側で接続箱本体６に一対のガイド壁１８を対向して設け、ガイド壁は、上から下に傾斜した入口側の傾斜面１８ａと、傾斜面に続く真直な水平面１８ｂとを有し、端子１は、傾斜面と水平面とに順次摺接する一対の外向きの突片３を有する。端子３１の垂直な開口３５を有する垂直板部３２の上部に放熱板部３３を一体に延長形成し、放熱板部の表裏面に複数本の線状の凹凸３４を形成し、放熱板部の表裏両面を外部に露出させた。

Description

電気接続箱の端子装着構造
　本発明は、電源供給用等の電線付きの端子を電気接続箱のバスバーにボルトで締結接続する電気接続箱の端子装着構造に関するものである。
　図７（ａ）（ｂ）は、従来の電気接続箱の端子装着構造の一形態を示すものである（類似例として例えば特許文献１，２参照）。
　この構造は、側面視で略クランク状に屈曲した導電金属製の所謂斜め締め防止端子５１を電気接続箱（リレーブロック）４２の導電金属板状のバスバー４４にボルト４５で締付接続するものである。電気接続箱４２は自動車に搭載される。
　端子５１は、ボルト４５の頭部を挿通させる矩形状の開口５２を上向きの垂直板部５３に有し、開口５２は水平板部５４の開口５５からＵ字状の切欠孔５６に連通し、切欠孔５６にボルト４５の軸部が挿通される。水平板部５４は下向きの電線接続板部５７に続き、接続板部５７の左右一対の圧着片５７ａ（切欠して示している）が電源供給用の電線５８の導体部に圧着接続され、下側の幅狭の左右一対の圧着片５７ｂが電線５８の絶縁被覆に圧着固定されている。各板部５３，５４，５７の両側縁には補強用のリブが立ち上げ形成されている。
　電気接続箱４２は、絶縁樹脂製の接続箱本体４３と、接続箱本体４３に沿って配索されたバスバー４４と、接続箱本体内でバスバー４４の水平板部（符号４４で代用）のボルト挿通孔の下側に配置され、ボルト４５の軸部に螺合したナット（図示せず）と、水平板部の両側において接続箱本体４３から一体に立ち上げられた一対の区画壁４６と、一対の区画壁４６を連結して平面視でコの字状の周壁を構成する奥側の垂直な壁部４７と、壁部４７の手前に配置された可撓性の端子係止部４８とを備えている。
　端子５１は区画壁４６内に水平に挿入され、仮止めのボルト４５の頭部が正面側の開口５２を通り、ボルト４５の軸部が切欠孔５６に挿入され、垂直板部５３の両側の立ち上げ部が係止部４８で係止され、ボルト４５が本締めされて、水平板部５４がバスバー４４の水平部に密着接続される。図７で符号４４ａはバッテリ上がり時にブースタケーブル（図示せず）を接続するためのバスバー４４の垂直部を示す。端子５１はバッテリに接続されるものと、オルタネータに接続されるものの二つが並列に配置され、バスバー４４は両端子５１に相互に接続されている。
特開２００６－４７３３号公報 特開平１１－２１３８５５号公報
　しかしながら、上記従来の電気接続箱の端子装着構造にあっては、例えば電気接続箱が車両の下部側に配置され、端子が上側から斜め下向きにボルトに挿入される場合等において、ボルトとの係合を上手く行い難く、電気接続箱への端子の装着作業性が悪いという問題があった。
　また、端子が電源等に接続されて高温になるために、例えば端子の電線接続部に圧着緩みを生じ兼ねず、この場合に、端子と電線の接触抵抗が増して、端子がさらに高温になると共に、電線接続の信頼性が低下するという懸念があった。
　本発明は、上記した点に鑑み、電気接続箱に電源供給用等の端子をねじ締め接続する構造において、端子の挿入方向が斜めであってもスムーズに組付を行うことができ、また、それに加えて、電源供給等に起因する端子の発熱を抑えて、電線等との接続の信頼性を高めることができ、総括的に、電気接続箱における所謂斜め締め防止端子の装着性能を高めることのできる電気接続箱の端子装着構造を提供することを目的とする。
　上記目的を達成するために、本発明の請求項１に係る電気接続箱の端子装着構造は、電気接続箱のバスバーに端子がボルトで締付接続され、該端子がボルト頭部を挿通する垂直な開口と、ボルト軸部を挿入する水平な切欠孔とを連通して有した電気接続箱の端子装着構造であって、前記ボルトの両側で接続箱本体に一対のガイド壁が対向して設けられ、該ガイド壁が、上から下に傾斜した入口側の傾斜面と、該傾斜面に続く真直な水平面とを有し、前記端子が、該傾斜面と該水平面とに順次摺接する一対の外向きの突片を有したことを特徴とする。
　上記構成により、端子を斜め上方から斜め下向きに一対のガイド壁内に挿入するに際して、端子の一対の突片が一対のガイド壁の入口側の傾斜面に沿って斜め下向きに摺接案内され、次いで一対の突片が真直な水平面に沿って水平に摺接案内される。一対の突片は端子の熱を外部へ放熱する作用も行う。
　請求項２に係る電気接続箱の端子装着構造は、請求項１記載の電気接続箱の端子装着構造において、前記端子の前記垂直な開口を有する垂直板部の上部に放熱板部が一体に延長形成され、該放熱板部の表裏面に複数本の線状の凹凸が形成され、該放熱板部の表裏両面が外部に露出されたことを特徴とする。
　上記構成により、端子に電源供給等のための通電が行われた際に、例えば端子が加熱されて端子の電線接続部等に悪影響が生じることに対応して、端子の熱が広い放熱板部から外部に放熱され、さらに放熱板部の表裏の線状の複数本の凹凸が放熱板部の表面積を増して、放熱効果を促進させる。一対の突片は端子の熱を外部へ放熱する作用も行う。
　請求項１記載の発明によれば、たとえ電気接続箱が車両の下部側に配置されて、端子を電気接続箱に水平に組み付けることが困難な場合でも、端子を一対のガイド壁内に斜め上方から挿入することで、端子の一対の突片が一対のガイド壁の入口側の傾斜面から奥側の真直な水平面に沿ってスムーズに挿入されるから、電気接続箱への端子の組付作業をスムーズ且つ容易且つ確実に行うことができる。これにより、電気接続箱における所謂斜め締め防止端子の装着性能を高めることができる。また、一対の突片が端子の熱を外部に放熱することで、例えば端子の電線圧着部の緩み等が防止されて、電線との電気的接続の信頼性や給電の信頼性が向上する。
　請求項２記載の発明によれば、電源供給用等の端子に生じた熱が放熱板部の表裏両面から外部に放熱され、表裏両面の線状の複数本の凹凸が表裏両面の表面積を増して放熱効果を促進するから、端子の熱が低減されて、例えば端子の電線圧着部の緩み等が防止されて、電線との電気的接続の信頼性や給電の信頼性が向上する。これにより、電気接続箱における所謂斜め締め防止端子の装着性能を高めることができる。一対の突片が端子の熱を外部に放熱することで、上記効果が促進されることは言うまでもない。
本発明に係る電気接続箱の端子装着構造の一実施形態を示す分解斜視図である。 同じく端子の要部を示す斜視図である。 （ａ）は図１の要部Ａ拡大斜視図、（ｂ）は同じく要部Ａの内側の側面図である。 （ａ）～（ｄ）は端子を電気接続箱に装着する状態を順に示す斜視図である。 本発明に係る電気接続箱の端子装着構造の他の実施形態における端子を示す、（ａ）は全体斜視図、（ｂ）は要部斜視図である。 同じく電気接続箱の端子装着構造を示す斜視図である。 従来の電気接続箱の端子装着構造の一形態を示す、（ａ）は端子組付前の分解斜視図、（ｂ）は端子組付後の斜視図である。
　図１～図４は、本発明に係る電気接続箱の端子装着構造の第一の実施形態を示すものである。
　この構造は、図１，図２の如く、端子１の水平板部２の両側に水平な一対の突片３を一体形成すると共に、図１，図３の如く、電気接続箱５の絶縁樹脂製の接続箱本体６に、端子１の一対の突片３を斜め下向きに案内する案内部７を一体に形成したものである。
　図１において端子１は説明の便宜状、電気接続箱５に対して実際よりも大きく図示している。端子１は、ボルト頭部挿入用の矩形状の垂直な幅広の開口８を有する垂直板部４と、垂直板部４の下側に直交して続き、開口８に続く水平な幅広の開口９と、開口９に傾斜部１０を介して続く幅狭の水平な略Ｕ字状の切欠孔１１とを有する水平板部２と、水平板部２の下側に直交して続く電線接続部（電線圧着部）１２とを備えたものである。
　図１，図２の如く、垂直板部４は、上側の水平な連結部４ａと左右両側の立ち上げ部４ｂと、各立ち上げ部４ｂから後方に直角に屈曲したリブ４ｃとで略コの字状の枠状部（４）として構成されている。水平板部２は、幅広の開口９の両側に位置する幅狭板部２ａと、切欠孔１１の両側及び後方に位置する幅広板部（Ｕ字又部）２ｂと、幅狭板部２ａの外側端にフィン状に突設された一対の突片３と、幅広板部２ｂの外側縁に立ち上げられたリブ２ｃとを備えている。
　突片３は、幅狭板部２ａから垂直ないしほぼ垂直に短く立ち上げられた支持部３ａと、支持部３ａから水平に延長された平面視略矩形状の主体部３ｂとで構成され、主体部の前端部には湾曲状の傾斜部３ｃが形成されている。図２の如く、突片３はリブ２ｃよりも若干低く配置されている。垂直板部４のリブ４ｃの下部後端に隙間１３を存して突片３の前端部３ｃが位置し、突片３の後端に若干の隙間１４を存して水平板部２のリブ２ｃの前端が位置している。
　図１の如く、水平板部２のリブ２ｃは電線接続部１２の両側に垂下して続き、電線接続部１２の上側の左右一対の圧着片１２ａが電源供給用等の電線１５の導体部に加締め接続され、下側の一対の圧着片１２ｂが電線１５の絶縁被覆に圧着固定されている。明細書で前後左右の方向性は説明の便宜上のものである。
　図１の如く、本例の接続箱本体６は高さ方向中間のフレームであり、フレーム６の上部開口を覆う上カバー（図示せず）と、フレーム６の下部開口を覆う下カバー１６とを備えている。フレーム６の上部に端子１を斜め下向きに案内する案内部７が一体に形成されている。
　図３（ａ）（図１の要部Ａ拡大図）の如く、案内部７は、左右一対の垂直な壁部１７と、一対の壁部１７の内面に沿って一体に略鍔状に形成され、一対の壁部１７と共に厚肉部を成すガイドレール状のガイド壁１８と、左右一対の壁部１７を連結する前側（奥側）の垂直な壁部１９とで構成され、ガイド壁１８は入口側（後端側）に斜め下向きの傾斜面（ガイド面）１８ａを有している。左右の垂直な壁部１７はガイド壁１８の下側において左右に開口していてもよい。
　図３（ｂ）の如く、傾斜面１８ａは案内部７の後部入口からボルト２０の両側にかけての範囲でガイド壁１８の後半の下端面に形成されて、ガイド壁１８の前半のストレートな下端面である水平面（ガイド面）１８ｂに続いている。案内部７の底面に配置されたバスバー２１の水平部（符号２１で代用）の上面と、ガイド壁１８の水平なガイド面１８ｂとの間の垂直距離Ｈは端子１の突片３の高さよりも若干大きく設定されている。バスバー２１の水平部の孔２１ａにボルト２０が下向きに挿通されてフレーム６内の下側のナット（図示せず）に仮止めされている。
　図４（ａ）の如く、端子１を斜め下向きにした状態で、フレーム６の案内部７の後部開口２２に向けて挿入する。図４（ｂ）の如く、端子１の左右一対の突片３の上面が一対のガイド壁１８の入口側の傾斜面１８ａに沿ってスムーズに摺接しつつ端子１が斜め下向きに案内部７内に挿入される。突片３の前端の傾斜面３ｃがガイド壁１８の傾斜面１８ａに沿って引っ掛かりなくスムーズに挿入される。
　図４（ｃ）の如く、突片３の上面がガイド壁１８の傾斜面１８ａからストレートな水平面１８ｂに沿って前進しつつ、端子１が自動的に水平に案内部７内に挿入される。この状態で、図４（ｄ）の如く、案内部７の奥（前端）まで端子１が水平に挿入され、端子１の垂直板部４が奥側の垂直な壁部１９に当接すると同時に、壁部１９の手前側の可撓性の係止部２３で係止される。突片３の前端の傾斜面３ｃがガイド壁１８の傾斜面１８ａと水平面１８ｂとの湾曲状の交差部１８ｃを引っ掛かりなくスムーズに通過する。
　係止部２３は図７の従来例と同様のもので、奥側の壁部１９の中央に垂設された支持板部２３ａと、支持板部２３ａの左右両側に形成された可撓性のアーム状の爪部２３ｂとで構成される。係止部２３が端子１の前部開口８（図１）からボルト２０の頭部と共に挿入され、爪部２３ｂが垂直板部４の左右両側の立ち上げ部４ｂ（図１）を係止する。その状態でボルト２０を本締めし、端子１の水平板部２が下側のバスバー２１に密着接続される。
　バスバー２１はフレーム６内に屈曲して続き、例えばフレーム上部に装着されたヒューズやリレーやコネクタ内の端子等（図示せず）に接続されて電源を供給する。
　上記実施形態によれば、たとえ電気接続箱５が車両の低い位置に配置され、作業者が電線付きの端子１を上方から斜め下向きに電気接続箱５に組み付ける場合でも、案内部７内のガイド壁１８の傾斜面１８ａとそれに続く水平面１８ｂに沿って端子１の挿入を作業性良くスムーズ且つ確実に行うことができる。また、端子１の一対の突片３が端子１の熱を外部に放熱することで、例えば端子１の電線圧着部１２の緩み等を防止して、電線１５との電気的接続の信頼性や給電の信頼性を高めることができる。
　図５～図６は、本発明に係る電気接続箱の端子装着構造の第二の実施形態を示すものである。
　この構造は、図１～図４の実施形態と同様の電気接続箱の端子装着構造において、端子３１の垂直板部３２を上向きに延長して放熱板部３３とすると共に、放熱板部３３の表裏両面に線状の複数本の凹凸３４を形成して表面積を増加させて、放熱板部３３の放熱効果を高めたものである。
　図５（ａ）（ｂ）の如く、本例の端子３１は、ボルト頭部挿入用の矩形状の幅広の開口３５を有する垂直板部３２と、垂直板部３２に一体に延長形成された前記放熱板部３３と、垂直板部３２の下側に直交して続き、開口３５に続く幅広の開口３６と、開口３６に傾斜部３７を介して続く幅狭の略Ｕ字状の切欠孔３８とを有する水平板部３９と、水平板部９の左右両側に水平に突出形成された一対の突片３０と、水平板部３９の下側に直交して続く電線接続部（電線圧着部）４０とを備えたものである。
　垂直板部３２は、上側に高く延長された板状の連結部である放熱板部３３と、放熱板部３３の下側に一体に続く左右両側の立ち上げ部３２ａと、放熱板部３３と各立ち上げ部３２ａから後方に直角に屈曲したリブ３２ｂとで略コの字状の枠状部として構成されている。水平板部３９は、幅広の開口３６の両側に位置する幅狭板部３９ａと、切欠孔３８の両側及び後方に位置する幅広板部（Ｕ字又部）３９ｂと、幅広板部３９ｂの外側縁に立ち上げられたリブ３９ｃと、左右両側の突片３０とを備えている。
　水平板部３９のリブ３９ｃは電線接続部４０の両側に垂下して続き、電線接続部４０の上側の左右一対の圧着片４０ａが電源供給用等の電線４１の導体部に加締め接続され、下側の左右一対の圧着片４０ｂが電線４１の絶縁被覆に圧着固定されている。
　垂直な連結板部３３とその両側のリブ３２ｂとに水平方向の細溝３４ａが上下方向に等ピッチで縦断面鋸歯状ないしねじ状に並列に形成されて細かい線状の凹凸３４が構成されている。凹凸３４は端子３１の展開状態（端子３１を導電金属板からプレスで打ち抜いた状態）で、垂直板部３２をプレス金型の波形の凹凸（図示せず）で強く押圧することで容易に形成可能である。
　図６の如く、電気接続箱４２は、図１～図４の実施形態におけるとほぼ同様のものであり、絶縁樹脂製の接続箱本体４３と、接続箱本体４３に沿って配索されたバスバー４４と、接続箱本体内でバスバー４４の水平板部（符号４４で代用）のボルト挿通孔の下側に配置され、ボルト４５の軸部に螺合したナット（図示せず）と、水平板部３９の両側において接続箱本体４３から一体に立ち上げられた一対の垂直な壁部４６と、一対の壁部４６の内側に一体に設けられたガイド壁４９と、一対の壁部４６を連結し、且つ壁部４６やガイド壁４９よりも高く延長されて平面視でコの字状の周壁を構成する奥側の垂直な壁部４７と、垂直な壁部４７の手前に配置された可撓性の端子係止部４８とを備えている。
　係止部４８の垂直な支持板４８ａは端子３１の垂直板部３２の切欠スロット３２ｃに係合して垂直板部３２を位置決めしている。端子３１の左右一対の突片３０はガイド壁４９の入口側の湾曲面に沿って案内挿入されて奥側の水平面に沿って位置している。
　端子３１を一対のガイド壁４９の下側に水平に挿入して、端子３１の垂直板部３２を奥側の壁部４７に当接させた状態で、垂直板部３２の上側の放熱板部３３は奥側の壁部４７よりも高く突出して外部に露出される。そして電源接続用等の端子３１の熱が矢印Ｂのように放熱板部３３から外気に放熱されつつ、端子３１の熱が矢印Ｃのように放熱板部３３に向けて移動し、それにより端子３１の熱が下がる。放熱板部３３の線状の凹凸３４はこの冷却作用を促進させる。また、端子３１の左右一対の突片３０が端子３１の熱を放熱して、これらの冷却作用を促進させる。
　図５～図６の実施形態によれば、バスバー４４にボルト４５で端子３１を締付接続して、通電により端子３１に生じた熱を放熱板部３３から端子外部へ効率良く放出することができ、さらに放熱板部３３の凹凸３４によってこの作用を促進させて、端子３１の発熱を抑え、端子３１への通電電流値のアップを図ることができる。そして、突片３と放熱板部３３と凹凸３４との作用で、電気接続箱５への端子１の装着作業性と端子１の放熱性の向上との両方を達成することができる。
　本発明は、電気接続箱に電源供給用等の端子をねじ締め接続する構造において、端子の挿入方向が斜めであってもスムーズに組付を行い、それに加えて、電源供給等に起因する端子の発熱を抑えて、電線等との接続の信頼性を高め、総括的に、電気接続箱における所謂斜め締め防止端子の装着性能を高めるために利用することができる。
　１，３１　　端子
　３，３０　　突片
　５，４２　　電気接続箱
　６　　　　　接続箱本体
　８，３５　　開口
　１１，３８　切欠孔
　１８，４９　ガイド壁
　１８ａ　　　傾斜面
　１８ｂ　　　水平面
　２０，４５　ボルト
　２１，４４　バスバー
　３２　　　　垂直板部
　３３　　　　放熱板部
　３４　　　　凹凸

Claims (2)

  1. 　電気接続箱のバスバーに端子がボルトで締付接続され、該端子がボルト頭部を挿通する垂直な開口と、ボルト軸部を挿入する水平な切欠孔とを連通して有した電気接続箱の端子装着構造であって、
    　前記ボルトの両側で接続箱本体に一対のガイド壁が対向して設けられ、該ガイド壁が、上から下に傾斜した入口側の傾斜面と、該傾斜面に続く真直な水平面とを有し、前記端子が、該傾斜面と該水平面とに順次摺接する一対の外向きの突片を有したことを特徴とする電気接続箱の端子装着構造。
  2. 　前記端子の前記垂直な開口を有する垂直板部の上部に放熱板部が一体に延長形成され、該放熱板部の表裏面に複数本の線状の凹凸が形成され、該放熱板部の表裏両面が外部に露出されたことを特徴とする請求項１記載の電気接続箱の端子装着構造。
PCT/JP2009/059970 2008-07-16 2009-06-01 電気接続箱の端子装着構造 WO2010007832A1 (ja)

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CN200980107251.7A CN101960685B (zh) 2008-07-16 2009-06-01 电接线盒的端子安装结构
US12/866,816 US7914300B2 (en) 2008-07-16 2009-06-01 Terminal mounting structure in electrical junction box
EP09797760.7A EP2302750B1 (en) 2008-07-16 2009-06-01 Terminal installation structure for electrical junction box
CA2715523A CA2715523C (en) 2008-07-16 2009-06-01 Terminal mounting structure in electrical junction box

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JP2008184692A JP5131981B2 (ja) 2008-07-16 2008-07-16 電気接続箱の端子装着構造

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