WO2017212920A1 - Terminal-equipped electric wire - Google Patents

Terminal-equipped electric wire Download PDF

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Publication number
WO2017212920A1
WO2017212920A1 PCT/JP2017/019322 JP2017019322W WO2017212920A1 WO 2017212920 A1 WO2017212920 A1 WO 2017212920A1 JP 2017019322 W JP2017019322 W JP 2017019322W WO 2017212920 A1 WO2017212920 A1 WO 2017212920A1
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WIPO (PCT)
Prior art keywords
electric wire
terminal
crimped
wire
insulating coating
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PCT/JP2017/019322
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French (fr)
Japanese (ja)
Inventor
高信 嶋田
丈博 中田
悟史 森川
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株式会社オートネットワーク技術研究所
住友電装株式会社
住友電気工業株式会社
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Publication of WO2017212920A1 publication Critical patent/WO2017212920A1/en

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    • 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
    • H01R4/10—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—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 effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • 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
    • H01R4/58—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 characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors

Definitions

  • the technology disclosed in this specification relates to a terminal-attached electric wire.
  • the holding force of the terminal with respect to the electric wire is not sufficient, and when the force in the direction of pulling out from the terminal is applied to the electric wire, the electric wire may come off from the terminal relatively easily.
  • the technology shown in the present specification has been conceived in view of the above-described problems, and an object thereof is to provide a terminal-attached electric wire having a high terminal holding force with respect to the electric wire.
  • the technology disclosed in the present specification is an electric wire with a terminal including an electric wire having a core wire covered with an insulating coating, and a terminal connected to an end of the electric wire, wherein the terminal extends in the extending direction of the electric wire.
  • a concave portion is provided on the surface of the crimping piece disposed on the insulating coating side,
  • the compression rate represented by the following formula (1) of the crimping region where the crimping piece is crimped among the core wires is 70% or more and less than 100%.
  • Compression rate ⁇ (Cross sectional area of electric wire after crimping) / (Cross sectional area of electric wire before crimping) ⁇ ⁇ 100 (%) (1) According to such a terminal-attached electric wire, it is possible to obtain a terminal-attached electric wire having a higher holding force of the terminal with respect to the electric wire as compared with the case of using a terminal having a form in which no recess is provided.
  • the mechanism is guessed as follows.
  • the edge of the recess bites into the insulation coating, so it becomes difficult to slip between the insulation barrel and the insulation coating, thereby forming the recess. It is considered that a better fixing force can be obtained when the compression rate is the same as that of a conventional terminal that is not used.
  • the core wire disposed inside the crimping region is crushed and damaged, and there is a risk of disconnection.
  • the portion of the insulating coating adjacent to the concave portion escapes into the concave portion when being compressed by the crimping piece, so that the core wire disposed inside the insulating coating is separated from the insulating coating. Excessive stress is suppressed.
  • the compression rate is preferably 70% or more and less than 100%, but more preferably in the range of 80% to 90%.
  • the electric wire with terminal may have the following configuration.
  • the recess may be a groove extending in a direction intersecting with the extending direction of the electric wire.
  • the relatively long hole edge of the groove opening bites into the insulating coating, and the terminal and the insulating coating become more difficult to slip, so that the holding power of the terminal to the electric wire is improved.
  • the core wire may be made of aluminum or an aluminum alloy. Aluminum wires are less likely to slip due to less elongation of the core wire, and higher holding power can be obtained.
  • This embodiment has illustrated the electric wire 30 with a terminal arranged, for example in a vehicle, and this electric wire 30 with a terminal is connected to the female terminal 10 and the female terminal 10, and is an electric wire pulled out back from the female terminal 10. 20 (see FIG. 1).
  • the left side in FIG. 1 is the front side
  • the right side is the rear side
  • the upper side is the upper side
  • the lower side is the lower side.
  • the lower right in FIG. 2 is the left and the upper left is the right.
  • the electric wire 20 has a structure in which, for example, a core wire 21 is formed by a stranded wire obtained by twisting a plurality of strands made of aluminum or aluminum alloy, and the core wire 21 is covered with an insulating coating 22 made of synthetic resin.
  • the insulation coating 22 of the terminal is peeled off, the core wire 21 is exposed forward from the insulation coating 22, and the female terminal 10 is connected to this terminal.
  • the female terminal 10 is formed by punching a base material made of a copper alloy and performing bending or the like. As shown in FIG. 1, a wire barrel connected to the terminal connecting portion 11 and the core wire 21 of the electric wire 20. 12, an insulation barrel 14 that is crimped to the insulating coating 22 of the electric wire 20, and a connecting portion 13 that connects the wire barrel 12 and the insulation barrel 14.
  • the terminal connection portion 11 is formed in a box shape having a rectangular tube shape, and a male terminal tab (not shown) is inserted therein to be electrically connected.
  • the wire barrel 12 is of an open barrel type, and as shown in FIG. 2, a pair of wire barrel pieces 12B extending from side to side rise from the left and right side edges of the bottom plate portion 12A. These wire barrel pieces 12B are crimped and electrically connected to the core wire 21 by being caulked inwardly with respect to the core wire 21 exposed from the insulating coating 22 at the front end portion of the electric wire 20. .
  • the insulation barrel 14 is also of an open barrel type, and is provided behind the wire barrel 12 with the connecting portion 13 interposed therebetween, and is a pair of insulation barrel pieces of a substantially rectangular shape having the same shape and the same size.
  • 14B (an example of a crimping piece) extends from the left and right side edges of the bottom plate portion 14A at positions that are symmetrical to each other and rises up so as to face each other.
  • the pair of insulation barrel pieces 14B extend from the bottom plate portion 14A in the left-right direction intersecting the extending direction X (front-rear direction) of the electric wire 20.
  • a groove portion extending continuously in a direction substantially orthogonal to the extending direction X of the electric wire 20. 14C is provided (see FIG. 3).
  • tip parts of a pair of insulation barrel piece 14B is the extending direction of the electric wire 20, as shown in FIG. It is notched obliquely so as to extend along X (front-rear direction) and is tapered.
  • the pair of insulation barrel pieces 14B are wound around the outer periphery of the insulating coating 22 of the electric wire 20 placed on the bottom plate portion 14A, and are crimped in the radial direction against the outer peripheral surface of the insulating coating 22. . Moreover, when crimping
  • the electric wire 20 in which the insulation coating 22 is peeled off at the terminal and the core wire 21 is exposed is placed on the upper surfaces of the bottom plate portions 12A and 14A of the wire barrel 12 and the insulation barrel 14 and the connecting portion 13.
  • the electric wire 20 is placed on the connecting portion 13 so that a boundary portion between the core wire 21 and the insulating coating 22 is disposed, and the position of the electric wire 20 in the front-rear direction with respect to the female terminal 10 is determined.
  • the pair of wire barrel pieces 12B in the wire barrel 12 are crimped so as to be wound inside the core wire 21 of the electric wire 20, and the pair of insulation barrel pieces 14B in the insulation barrel 14 are insulated and coated on the electric wire 20. Crimp so that it is wrapped around 22.
  • the pair of insulation barrel pieces 14B are placed on the outer periphery of the insulating coating 22 so that their tip portions overlap each other. Clamp while wrapping.
  • the wire barrel 12 is crimped and fixed to the core wire 21, and the insulation barrel 14 is crimped and fixed to the insulating coating 22, so that the female terminal 10 is attached to the electric wire 20.
  • the electric wire 30 is obtained.
  • the terminal 10 described above was formed by pressing a metal plate material having a thickness of 0.25 mm made of a copper member containing a copper alloy.
  • the groove portion 14C has an inclined shape in which the groove wall from the bottom surface toward the hole edge is slightly expanded toward the hole edge, the groove width at the hole edge is 0.15 mm, and the groove depth is 0.075 mm.
  • the wire barrel 12 of the terminal 10 is crimped to the core wire 21 of the electric wire 20 having the core wire 21 having a cross-sectional area of 0.5 mm 2 made of an aluminum alloy, and the insulation barrel 14 is crimped to the insulation coating 22 to obtain insulation.
  • Five types of terminal-attached electric wires 30 with different compression ratios of the barrel 14 were produced.
  • the insulation barrel 14 was crimped in an overlapping manner.
  • the compression ratio of the insulation barrel 14 is 59% (Comparative Example 1), 73% (Example 1), 81% (Example 2), 88% (Example 3), and 99% (Example 4).
  • the five types were changed to 25.
  • the compression rate is a value defined by the following formula (1).
  • Compression rate ⁇ (Cross sectional area of electric wire after crimping) / (Cross sectional area of electric wire before crimping) ⁇ ⁇ 100 (%) (1)
  • the compression ratio was in the range of 70% or more and less than 100%, the adhesion strength value was 126 or more. Further, it was found that when the compression ratio is in the range of 80% to 90%, the fixing force is the highest at 140 N, which is more preferable.
  • the female terminal 10 is shown as an example.
  • the present invention is disclosed in this specification for all terminals provided with an insulation barrel, such as a male terminal provided with an insulation barrel that is crimped to the insulating coating 22.
  • the applied technology can be widely applied.
  • the pair of insulation barrel pieces 14B are configured to be crimped to the electric wire 20 in an overlapping manner, but the tip portions may be opposed to each other and abutted.
  • the present invention may be applied to a copper electric wire having a core wire made of a copper alloy.
  • the strand wire was illustrated in the said embodiment, you may apply to the straight core wire which has not twisted each strand.
  • the insulation barrel 14 is provided with a single groove, but two or more grooves may be provided. Moreover, it is good also as a structure which provides not only a groove part but a some short recessed part, uneven

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  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Abstract

A terminal-equipped electric wire provided with an electric wire obtained by covering a core wire with an insulating coating, and a terminal connected to the end of the electric wire, wherein: the terminal is equipped with a crimped piece crimped on the outer-peripheral surface of the insulating coating, and formed so as to project in a direction that intersects the direction in which the electric wire extends; a recess (14C) is provided in the surface of the crimped piece on the insulating coating side thereof; the compression ratio represented by formula (1) in the crimped region of the core wire where the crimped piece is crimped is at least 70% and less than 100%. Compression ratio=[(cross-sectional area of crimped electric wire)/(cross-sectional area of electric wire before crimping)]×100(%) (1)

Description

端子付き電線Electric wire with terminal
　本明細書で開示される技術は、端子付き電線に関する。 The technology disclosed in this specification relates to a terminal-attached electric wire.
　従来、自動車等のワイヤーハーネス等の分野においては、電線の端末に端子が接続された端子付き電線が使用されている。具体的には、電線の絶縁被覆の端末が皮剥ぎされて芯線の端末が露出され、この露出された芯線の端末に対して、端子に設けられたワイヤバレル（電線接続部）が圧着されて接続され、残った絶縁被覆の端末に、ワイヤバレルの後方に設けられたインシュレーションバレルが圧着されるようになっている。 Conventionally, in the field of wire harnesses for automobiles, etc., electric wires with terminals in which terminals are connected to the ends of electric wires have been used. Specifically, the end of the insulation coating of the electric wire is peeled off to expose the end of the core wire, and the wire barrel (electric wire connecting portion) provided on the terminal is crimped to the exposed end of the core wire. An insulation barrel provided behind the wire barrel is pressure-bonded to the terminal of the insulation coating remaining after connection.
特開２０１１－１９２５３０号公報JP 2011-192530 A
　しかしながら、上述した従来の構成では端子の電線に対する保持力が充分でなく、電線に端子から引き抜く方向の力が加えられた場合に、比較的簡単に電線が端子から外れてしまうことがあった。 However, in the conventional configuration described above, the holding force of the terminal with respect to the electric wire is not sufficient, and when the force in the direction of pulling out from the terminal is applied to the electric wire, the electric wire may come off from the terminal relatively easily.
　そこで、端子の電線に対する保持力を高めるべく、インシュレーションバレルを絶縁被覆に対して高圧縮（強い力）で圧着することが考えられる。しかし、インシュレーションバレルの圧縮率を低くしても（高圧縮としても）、未だ保持力が充分であるとは言い難く、さらなる保持力の向上が要望されている。 Therefore, it is conceivable to press the insulation barrel against the insulation coating with high compression (strong force) in order to increase the holding force of the terminal to the electric wire. However, even if the compression rate of the insulation barrel is lowered (even if the compression is high), it is still difficult to say that the holding force is sufficient, and further improvement in holding force is desired.
　本明細書に示される技術は上記の課題に鑑みて考えられたものであって、電線に対する端子の保持力が高い端子付き電線を提供すること目的とする。 The technology shown in the present specification has been conceived in view of the above-described problems, and an object thereof is to provide a terminal-attached electric wire having a high terminal holding force with respect to the electric wire.
　本明細書に開示される技術は、芯線を絶縁被覆で覆った電線と、前記電線の端末に接続される端子と、を備えた端子付き電線であって、前記端子は、前記電線の延び方向と交差する方向に延出して形成され、前記絶縁被覆の外周面に圧着される圧着片を備えており、前記圧着片のうち前記絶縁被覆側に配される面に凹部が設けられており、前記芯線のうち前記圧着片が圧着された圧着領域の下記式（１）で表される圧縮率が、７０％以上１００％未満である。 The technology disclosed in the present specification is an electric wire with a terminal including an electric wire having a core wire covered with an insulating coating, and a terminal connected to an end of the electric wire, wherein the terminal extends in the extending direction of the electric wire. Extending in the direction intersecting with, and comprising a crimping piece that is crimped to the outer peripheral surface of the insulating coating, a concave portion is provided on the surface of the crimping piece disposed on the insulating coating side, The compression rate represented by the following formula (1) of the crimping region where the crimping piece is crimped among the core wires is 70% or more and less than 100%.
　圧縮率＝｛（圧着後の電線の断面積）／（圧着前の電線の断面積）｝×１００（％）…（１）
　このような端子付き電線によれば、凹部が設けられていない形態の端子を使用する場合と比較して、電線に対する端子の保持力が高い端子付き電線を得ることができる。 Compression rate = {(Cross sectional area of electric wire after crimping) / (Cross sectional area of electric wire before crimping)} × 100 (%) (1)
According to such a terminal-attached electric wire, it is possible to obtain a terminal-attached electric wire having a higher holding force of the terminal with respect to the electric wire as compared with the case of using a terminal having a form in which no recess is provided.
　そのメカニズムは、以下のように推察される。すなわち、凹部が設けられたインシュレーションバレルを電線の絶縁被覆に圧着した場合には、凹部の縁部が絶縁被覆に食い込むため、インシュレーションバレルと絶縁被覆との間が滑り難くなり、凹部が形成されていない従来の端子と比較して、同等の圧縮率とした場合に、より良好な固着力が得られるものと考えられる。 The mechanism is guessed as follows. In other words, when the insulation barrel provided with the recess is crimped to the insulation coating of the electric wire, the edge of the recess bites into the insulation coating, so it becomes difficult to slip between the insulation barrel and the insulation coating, thereby forming the recess. It is considered that a better fixing force can be obtained when the compression rate is the same as that of a conventional terminal that is not used.
　ところで、圧着片を強い力で圧着すると、圧着領域の内側に配されている芯線が押し潰されて損傷し、断線する虞がある。しかし上述した構成によれば、絶縁被覆のうち凹部に隣接する部分は、圧着片により圧縮される際に凹部の中に逃げるため、絶縁被覆の内側に配されている芯線に対して絶縁被覆から過剰な応力がかかることが抑制される。 By the way, when the crimping piece is crimped with a strong force, the core wire disposed inside the crimping region is crushed and damaged, and there is a risk of disconnection. However, according to the configuration described above, the portion of the insulating coating adjacent to the concave portion escapes into the concave portion when being compressed by the crimping piece, so that the core wire disposed inside the insulating coating is separated from the insulating coating. Excessive stress is suppressed.
　なお圧縮率は、７０％以上１００％未満であることが好ましいが、８０％～９０％の範囲内であることがより好ましい。 The compression rate is preferably 70% or more and less than 100%, but more preferably in the range of 80% to 90%.
　上記端子付き電線は、以下の構成を備えていてもよい。 The electric wire with terminal may have the following configuration.
　凹部は、電線の延び方向と交差する方向に延びる溝であってもよい。 The recess may be a groove extending in a direction intersecting with the extending direction of the electric wire.
　このような構成によれば、溝の開口の比較的長い孔縁が絶縁被覆に食い込むこととなり、端子と絶縁被覆とがより滑り難くなるから、端子の電線に対する保持力が向上する。 According to such a configuration, the relatively long hole edge of the groove opening bites into the insulating coating, and the terminal and the insulating coating become more difficult to slip, so that the holding power of the terminal to the electric wire is improved.
　また、芯線はアルミニウム又はアルミニウム合金製であってもよい。アルミ電線は芯線の伸びが少ないため滑り難く、より高い保持力が得られる。 The core wire may be made of aluminum or an aluminum alloy. Aluminum wires are less likely to slip due to less elongation of the core wire, and higher holding power can be obtained.
　本明細書に開示した技術によれば、電線に対する端子の保持力が高い端子付き電線を得ることができる。 According to the technique disclosed in this specification, it is possible to obtain a terminal-attached electric wire having a high terminal holding force with respect to the electric wire.
一実施形態の端子付き電線の側面図Side view of electric wire with terminal of one embodiment 雌端子の斜視図Perspective view of female terminal 雌端子の一部拡大平面図Partial enlarged plan view of female terminal 圧縮率と固着力の関係を示すグラフGraph showing the relationship between compressibility and adhesive strength 実験サンプルの断面写真Cross-sectional photo of experimental sample
　一実施形態について図１ないし図５を参照して説明する。 One embodiment will be described with reference to FIGS. 1 to 5.
　本実施形態は、例えば車両に配策される端子付き電線３０を例示しており、この端子付き電線３０は、雌端子１０と、雌端子１０に接続されて雌端子１０から後方に引き出される電線２０とを備えて構成されている（図１参照）。なお、以下の説明では、図１における左側を前方、右側を後方、上側を上方と、下側を下方とする。また、図２における右下を左、左上を右とする。 This embodiment has illustrated the electric wire 30 with a terminal arranged, for example in a vehicle, and this electric wire 30 with a terminal is connected to the female terminal 10 and the female terminal 10, and is an electric wire pulled out back from the female terminal 10. 20 (see FIG. 1). In the following description, the left side in FIG. 1 is the front side, the right side is the rear side, the upper side is the upper side, and the lower side is the lower side. Also, the lower right in FIG. 2 is the left and the upper left is the right.
　電線２０は、例えばアルミニウムまたはアルミニウム合金製の素線を複数本撚り合わせた撚り線によって芯線２１を形成し、この芯線２１が合成樹脂製の絶縁被覆２２により覆われた構造となっている。電線２０は、端末の絶縁被覆２２が皮剥ぎされて、芯線２１が絶縁被覆２２から前方に露出しており、この端末に雌端子１０が接続されている。 The electric wire 20 has a structure in which, for example, a core wire 21 is formed by a stranded wire obtained by twisting a plurality of strands made of aluminum or aluminum alloy, and the core wire 21 is covered with an insulating coating 22 made of synthetic resin. As for the electric wire 20, the insulation coating 22 of the terminal is peeled off, the core wire 21 is exposed forward from the insulation coating 22, and the female terminal 10 is connected to this terminal.
　雌端子１０は、銅合金からなる基材を打ち抜いて曲げ加工等を施すことにより形成されており、図１に示すように、端子接続部１１と、電線２０の芯線２１に接続されるワイヤバレル１２と、電線２０の絶縁被覆２２に圧着されるインシュレーションバレル１４と、ワイヤバレル１２とインシュレーションバレル１４との間を繋ぐ繋ぎ部１３と、を有している。端子接続部１１は、角筒状をなす箱状に成形されており、その内部に図示しない雄端子のタブが挿入され、電気的に接続されるようになっている。 The female terminal 10 is formed by punching a base material made of a copper alloy and performing bending or the like. As shown in FIG. 1, a wire barrel connected to the terminal connecting portion 11 and the core wire 21 of the electric wire 20. 12, an insulation barrel 14 that is crimped to the insulating coating 22 of the electric wire 20, and a connecting portion 13 that connects the wire barrel 12 and the insulation barrel 14. The terminal connection portion 11 is formed in a box shape having a rectangular tube shape, and a male terminal tab (not shown) is inserted therein to be electrically connected.
　ワイヤバレル１２はオープンバレル形式であって、図２に示すように、左右に伸びる一対のワイヤバレル片１２Ｂが底板部１２Ａの左右の側縁から互いに対向するようにして立ち上がっている。これらワイヤバレル片１２Ｂは、電線２０の前端部において絶縁被覆２２から露出する芯線２１に対して内向きに巻き込まれる形で加締められることで、当該芯線２１に圧着され、電気的に接続される。 The wire barrel 12 is of an open barrel type, and as shown in FIG. 2, a pair of wire barrel pieces 12B extending from side to side rise from the left and right side edges of the bottom plate portion 12A. These wire barrel pieces 12B are crimped and electrically connected to the core wire 21 by being caulked inwardly with respect to the core wire 21 exposed from the insulating coating 22 at the front end portion of the electric wire 20. .
　一方、インシュレーションバレル１４は同じくオープンバレル形式であって、繋ぎ部１３を挟んでワイヤバレル１２の後方に設けられており、左右対称な同形同大の略矩形状の一対のインシュレーションバレル片１４Ｂ（圧着片の一例）が、底板部１４Ａの左右の側縁から左右対称となる位置において延出されて互いに対向するように立ち上がっている。言い換えると、一対のインシュレーションバレル片１４Ｂは、底板部１４Ａから電線２０の延び方向Ｘ（前後方向）と交差する左右方向に延出した形態とされている。 On the other hand, the insulation barrel 14 is also of an open barrel type, and is provided behind the wire barrel 12 with the connecting portion 13 interposed therebetween, and is a pair of insulation barrel pieces of a substantially rectangular shape having the same shape and the same size. 14B (an example of a crimping piece) extends from the left and right side edges of the bottom plate portion 14A at positions that are symmetrical to each other and rises up so as to face each other. In other words, the pair of insulation barrel pieces 14B extend from the bottom plate portion 14A in the left-right direction intersecting the extending direction X (front-rear direction) of the electric wire 20.
　本実施形態のインシュレーションバレル１４のうち内側の面、すなわち、電線２０の絶縁被覆２２の外周面に圧着される面には、電線２０の延び方向Ｘとほぼ直交する方向に連続的に延びる溝部１４Ｃ（凹部の一例）が設けられている（図３参照）。 On the inner surface of the insulation barrel 14 of the present embodiment, that is, the surface to be crimped to the outer peripheral surface of the insulating coating 22 of the electric wire 20, a groove portion extending continuously in a direction substantially orthogonal to the extending direction X of the electric wire 20. 14C (an example of a recess) is provided (see FIG. 3).
　また一対のインシュレーションバレル片１４Ｂの先端部分のうち、絶縁被覆２２に圧着された状態において外側に配される面の先端縁部の角部は、図２に示すように、電線２０の延び方向Ｘ（前後方向）に沿って延びるように斜めに切り欠かれており、先細とされている。 Moreover, the corner | angular part of the front-end edge part of the surface distribute | arranged outside in the state crimped | bonded to the insulation coating 22 among the front-end | tip parts of a pair of insulation barrel piece 14B is the extending direction of the electric wire 20, as shown in FIG. It is notched obliquely so as to extend along X (front-rear direction) and is tapered.
　これら一対のインシュレーションバレル片１４Ｂは、底板部１４Ａに載置された電線２０の絶縁被覆２２の外周に巻き付けられ、絶縁被覆２２の外周面に対して径方向に圧着されるようになっている。また、絶縁被覆２２に圧着される際には、互いの先端部分が重なり合う、いわゆる、オーバーラップ形態で圧着されるようになっている。 The pair of insulation barrel pieces 14B are wound around the outer periphery of the insulating coating 22 of the electric wire 20 placed on the bottom plate portion 14A, and are crimped in the radial direction against the outer peripheral surface of the insulating coating 22. . Moreover, when crimping | bonding to the insulation coating 22, it is crimped | bonded by what is called an overlap form in which the front-end | tip parts mutually overlap.
　続いて、雌端子１０および電線２０を組み付ける手順について説明する。まず、ワイヤバレル１２およびインシュレーションバレル１４の底板部１２Ａ、１４Ａ、および、繋ぎ部１３の上面に、端末において絶縁被覆２２が皮剥ぎされて芯線２１が露出した電線２０を載置する。ここで、電線２０は、繋ぎ部１３上に芯線２１と絶縁被覆２２との境界部分が配されるように載置され、雌端子１０に対する電線２０の前後方向の位置が決定される。 Subsequently, a procedure for assembling the female terminal 10 and the electric wire 20 will be described. First, the electric wire 20 in which the insulation coating 22 is peeled off at the terminal and the core wire 21 is exposed is placed on the upper surfaces of the bottom plate portions 12A and 14A of the wire barrel 12 and the insulation barrel 14 and the connecting portion 13. Here, the electric wire 20 is placed on the connecting portion 13 so that a boundary portion between the core wire 21 and the insulating coating 22 is disposed, and the position of the electric wire 20 in the front-rear direction with respect to the female terminal 10 is determined.
　次に、ワイヤバレル１２における一対のワイヤバレル片１２Ｂを電線２０の芯線２１に対して内側に巻き込むようにして圧着すると共に、インシュレーションバレル１４における一対のインシュレーションバレル片１４Ｂを電線２０の絶縁被覆２２に巻き付けるようにして圧着する。 Next, the pair of wire barrel pieces 12B in the wire barrel 12 are crimped so as to be wound inside the core wire 21 of the electric wire 20, and the pair of insulation barrel pieces 14B in the insulation barrel 14 are insulated and coated on the electric wire 20. Crimp so that it is wrapped around 22.
　この圧着の過程において、絶縁被覆２２に対してインシュレーションバレル１４を圧着する際には、一対のインシュレーションバレル片１４Ｂを、それらの先端部分が互いに重ね合わされるように、絶縁被覆２２の外周に巻きつけつつ加締める。 In this crimping process, when the insulation barrel 14 is crimped to the insulating coating 22, the pair of insulation barrel pieces 14B are placed on the outer periphery of the insulating coating 22 so that their tip portions overlap each other. Clamp while wrapping.
　以上のように、芯線２１に対してワイヤバレル１２が圧着固定され、絶縁被覆２２に対してインシュレーションバレル１４が圧着固定されることで、電線２０に対して雌端子１０が取り付けられた端子付き電線３０が得られる。 As described above, the wire barrel 12 is crimped and fixed to the core wire 21, and the insulation barrel 14 is crimped and fixed to the insulating coating 22, so that the female terminal 10 is attached to the electric wire 20. The electric wire 30 is obtained.
　＜実験例＞
　以下、実験例を挙げて本実施形態をさらに詳細に説明する。銅合金を含む銅部材からなる厚さ０．２５ｍｍの金属板材をプレス加工することにより、上述した端子１０を形成した。溝部１４Ｃは、底面から孔縁に向かう溝壁が孔縁に向けてやや拡開する傾斜状とし、孔縁における溝幅を０．１５ｍｍ、溝深さを０．０７５ｍｍとした。 <Experimental example>
Hereinafter, the present embodiment will be described in more detail with reference to experimental examples. The terminal 10 described above was formed by pressing a metal plate material having a thickness of 0.25 mm made of a copper member containing a copper alloy. The groove portion 14C has an inclined shape in which the groove wall from the bottom surface toward the hole edge is slightly expanded toward the hole edge, the groove width at the hole edge is 0.15 mm, and the groove depth is 0.075 mm.
　アルミニウム合金からなる断面積０．５ｍｍ２の芯線２１を備えた電線２０の芯線２１に、この端子１０のワイヤバレル１２を圧着するとともに、絶縁被覆２２に、インシュレーションバレル１４を圧着し、インシュレーションバレル１４の圧縮率が異なる５種類の端子付き電線３０を作製した。インシュレーションバレル１４はオーバーラップ形態で圧着した。 The wire barrel 12 of the terminal 10 is crimped to the core wire 21 of the electric wire 20 having the core wire 21 having a cross-sectional area of 0.5 mm 2 made of an aluminum alloy, and the insulation barrel 14 is crimped to the insulation coating 22 to obtain insulation. Five types of terminal-attached electric wires 30 with different compression ratios of the barrel 14 were produced. The insulation barrel 14 was crimped in an overlapping manner.
　サンプルは、インシュレーションバレル１４の圧縮率を５９％（比較例１）、７３％（実施例１）、８１％（実施例２）、８８％（実施例３）、９９％（実施例４）と変化させた５種類２５個とした。 In the samples, the compression ratio of the insulation barrel 14 is 59% (Comparative Example 1), 73% (Example 1), 81% (Example 2), 88% (Example 3), and 99% (Example 4). The five types were changed to 25.
　また、溝部１４Ｃが形成されていない従来の端子を用いて、上述したサンプルと同じ圧縮率でインシュレーションバレルを圧着した比較用のサンプル（比較例２～比較例５）を５種類２５個用意した。 Also, 25 types of comparative samples (Comparative Examples 2 to 5), in which an insulation barrel was pressure-bonded at the same compression rate as the above-described sample using a conventional terminal in which no groove 14C was formed, were prepared. .
　なお、圧縮率とは、下記式（１）で定義される値のことである。
　圧縮率＝｛（圧着後の電線の断面積）／（圧着前の電線の断面積）｝×１００（％）…（１） The compression rate is a value defined by the following formula (1).
Compression rate = {(Cross sectional area of electric wire after crimping) / (Cross sectional area of electric wire before crimping)} × 100 (%) (1)
　上述したサンプルの端子と電線とをそれぞれ治具で把持し、引っ張り試験を実行した。試験速度は１００ｍｍ／ｍｉｎとし、端子から電線が離脱した時の応力を固着力の値とした。各サンプルの測定値（１～５）、平均値（ＡＶＥ）、最大測定値の平均値との差（ＭＡＸ）、最小測定値の平均値との差（ＭＩＮ）を表１に、グラフを図４に、また断面の写真を図５に示した。 The above-described sample terminal and electric wire were each held by a jig, and a tensile test was performed. The test speed was 100 mm / min, and the stress when the electric wire was detached from the terminal was defined as the value of the fixing force. Table 1 shows the measured values (1 to 5), average value (AVE), difference from the average value of the maximum measured value (MAX), and difference from the average value of the minimum measured value (MIN). 4 and a cross-sectional photograph are shown in FIG.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　実験結果からわかるように、溝部１４Ｃを設けた本実施形態の端子付き電線３０によれば、溝部が設けられていない従来の形態の端子付き電線と比較して、同じ圧縮率で比較した場合に、いずれの圧縮率でもより高い固着力が得られること、すなわち、より高い電線の保持力が得られることがわかった。これは、溝部１４Ｃの孔縁が絶縁被覆２２に食い込み、インシュレーションバレル１４と絶縁被覆２２との間が滑り難くなるためと考えられる。 As can be seen from the experimental results, according to the terminal-attached electric wire 30 of the present embodiment provided with the groove portion 14C, compared with the conventional electric wire with a terminal not provided with the groove portion, when compared at the same compression rate. It was found that a higher fixing force can be obtained at any compression rate, that is, a higher electric wire holding force can be obtained. This is presumably because the hole edge of the groove 14 </ b> C bites into the insulating coating 22, and it becomes difficult to slide between the insulation barrel 14 and the insulating coating 22.
　また、圧縮率が７０％以上１００％未満の範囲であると、いずれも固着力の値が１２６以上と良好であることがわかった。さらに、圧縮率は８０％～９０％の範囲内である時が固着力が１４０Ｎと最も高く、より好ましいことがわかった。 Further, it was found that when the compression ratio was in the range of 70% or more and less than 100%, the adhesion strength value was 126 or more. Further, it was found that when the compression ratio is in the range of 80% to 90%, the fixing force is the highest at 140 N, which is more preferable.
　一方、圧縮率が７０％より小さくなる（高圧縮になる）と、固着力は次第に低くなる。これは、溝部１４Ｃ内に逃がされていた絶縁被覆２２の逃げ場が次第になくなり、絶縁被覆２２および芯線２１に過剰な応力がかかって電線２０が潰れ、その結果、インシュレーションバレルから外れ易くなるためと考えられる。 On the other hand, when the compression ratio is smaller than 70% (high compression), the fixing force gradually decreases. This is because the escaping field of the insulating coating 22 that has escaped into the groove portion 14C gradually disappears, excessive stress is applied to the insulating coating 22 and the core wire 21, and the electric wire 20 is crushed. As a result, the insulating coating 22 is easily detached from the insulation barrel. it is conceivable that.
　また、実施例４（圧縮率９９％）のサンプルの固着力は、同圧縮率の従来のサンプル（比較例６）の固着力より高いだけでなく、従来のサンプルで得られた固着力の最高値（比較例４および比較例５）よりも高いことがわかる。このように本実施形態の端子付き電線３０では低圧縮の状態（圧縮率９９％）でも高い固着力が得られることから、溝部１４Ｃが固着力の向上に大いに寄与していることが確認できた。 Further, the fixing force of the sample of Example 4 (compression ratio 99%) is not only higher than the fixing force of the conventional sample (comparative example 6) of the same compression ratio, but also the highest fixing force obtained with the conventional sample. It can be seen that it is higher than the values (Comparative Example 4 and Comparative Example 5). Thus, in the electric wire 30 with a terminal of this embodiment, since a high fixing force can be obtained even in a low compression state (compression rate 99%), it was confirmed that the groove portion 14C greatly contributed to the improvement of the fixing force. .
　＜他の実施形態＞
　本明細書で開示される技術は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような種々の態様も含まれる。 <Other embodiments>
The technology disclosed in the present specification is not limited to the embodiments described with reference to the above description and drawings, and includes, for example, the following various aspects.
　（１）上記実施形態では、雌端子１０を一例として示したが、絶縁被覆２２に圧着するインシュレーションバレルが設けられた雄端子など、インシュレーションバレルが設けられた端子全般に本明細書で開示した技術を広く適用できる。 (1) In the above embodiment, the female terminal 10 is shown as an example. However, the present invention is disclosed in this specification for all terminals provided with an insulation barrel, such as a male terminal provided with an insulation barrel that is crimped to the insulating coating 22. The applied technology can be widely applied.
　（２）上記実施形態では、一対のインシュレーションバレル片１４Ｂをオーバーラップ形態で電線２０に圧着させる構成としたが、先端部分を互いに対向させるとともに突き合わせる形態としてもよい。 (2) In the above embodiment, the pair of insulation barrel pieces 14B are configured to be crimped to the electric wire 20 in an overlapping manner, but the tip portions may be opposed to each other and abutted.
　（３）あるいは、例えば一対のインシュレーションバレル片を電線２０の延び方向Ｘにずらして配し、前後の異なる位置で加締める形態のインシュレーションバレル等、他の形態のものに適用してもよい。 (3) Alternatively, for example, a pair of insulation barrel pieces may be shifted in the extending direction X of the electric wire 20 and applied to other forms such as an insulation barrel that is crimped at different positions before and after. .
　（４）上記実施形態ではアルミ電線２０を例示したが、銅合金からなる芯線を有する銅電線に適用してもよい。また、上記実施形態では撚り線を例示したが、各素線を撚り合わせてないストレート形状の芯線に適用してもよい。 (4) Although the aluminum electric wire 20 is illustrated in the above embodiment, the present invention may be applied to a copper electric wire having a core wire made of a copper alloy. Moreover, although the strand wire was illustrated in the said embodiment, you may apply to the straight core wire which has not twisted each strand.
　（５）上記実施形態では、インシュレーションバレル１４に一本の溝部を設ける構成としたが、二本以上の溝部を設けてもよい。また、溝部に限らず、複数の短尺の凹部や凹凸状のセレーション等を設ける構成としてもよい。 (5) In the above embodiment, the insulation barrel 14 is provided with a single groove, but two or more grooves may be provided. Moreover, it is good also as a structure which provides not only a groove part but a some short recessed part, uneven | corrugated serration, etc. FIG.
１０…雌端子（端子）
１２…ワイヤバレル
１３…繋ぎ部
１４…インシュレーションバレル
１４Ｂ…インシュレーションバレル片（圧着片）
１４Ｃ…溝部（凹部）
２０…電線
２１…芯線
２２…絶縁被覆
３０…端子付き電線
Ｘ…延び方向 10: Female terminal (terminal)
12 ... Wire barrel 13 ... Connecting portion 14 ... Insulation barrel 14B ... Insulation barrel piece (crimp piece)
14C ... Groove (recess)
20 ... Electric wire 21 ... Core wire 22 ... Insulation coating 30 ... Electric wire with terminal X ... Extension direction

Claims (3)

  1. 芯線を絶縁被覆で覆った電線と、前記電線の端末に接続される端子と、を備えた端子付き電線であって、
    　前記端子は、前記電線の延び方向と交差する方向に延出して形成され、前記絶縁被覆の外周面に圧着される圧着片を備えており、
    　前記圧着片のうち前記絶縁被覆側に配される面に凹部が設けられており、
    　前記芯線のうち前記圧着片が圧着された圧着領域の下記式（１）で表される圧縮率が、７０％以上１００％未満である端子付き電線。
    圧縮率＝｛（圧着後の電線の断面積）／（圧着前の電線の断面積）｝×１００（％）…（１）     An electric wire with a terminal comprising: an electric wire having a core wire covered with an insulating coating; and a terminal connected to an end of the electric wire,
    The terminal is formed to extend in a direction crossing the extending direction of the electric wire, and includes a crimping piece to be crimped to the outer peripheral surface of the insulating coating,
    A concave portion is provided on the surface of the crimping piece arranged on the insulating coating side,
    The electric wire with a terminal whose compression rate represented by the following formula (1) of the crimping area where the above-mentioned crimping piece was crimped among the above-mentioned core wires is 70% or more and less than 100%.
    Compression rate = {(Cross sectional area of electric wire after crimping) / (Cross sectional area of electric wire before crimping)} × 100 (%) (1)
  2. 前記凹部は、前記電線の延び方向と交差する方向に延びる溝である請求項１に記載の端子付き電線。 The electric wire with a terminal according to claim 1, wherein the concave portion is a groove extending in a direction intersecting with an extending direction of the electric wire.
  3. 前記芯線はアルミニウム又はアルミニウム合金からなる請求項１または請求項２に記載の端子付き電線。 The electric wire with a terminal according to claim 1, wherein the core wire is made of aluminum or an aluminum alloy.
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WO2014142155A1 (en) * 2013-03-15 2014-09-18 住友電装株式会社 Corrosion-resistant terminal, electric wire having corrosion-resistant terminal, and method for producing electric wire having corrosion-resistant terminal

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JP2010049897A (en) * 2008-08-20 2010-03-04 Sumitomo Wiring Syst Ltd Manufacturing method of terminal metal fitting
JP2011216253A (en) * 2010-03-31 2011-10-27 Yazaki Corp Crimp terminal and wire connection structure of crimp terminal
WO2014142155A1 (en) * 2013-03-15 2014-09-18 住友電装株式会社 Corrosion-resistant terminal, electric wire having corrosion-resistant terminal, and method for producing electric wire having corrosion-resistant terminal

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