JP5953593B2 - Terminal crimping structure to electric wire - Google Patents

Terminal crimping structure to electric wire Download PDF

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JP5953593B2
JP5953593B2 JP2012168515A JP2012168515A JP5953593B2 JP 5953593 B2 JP5953593 B2 JP 5953593B2 JP 2012168515 A JP2012168515 A JP 2012168515A JP 2012168515 A JP2012168515 A JP 2012168515A JP 5953593 B2 JP5953593 B2 JP 5953593B2
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伊藤　直樹
直樹 伊藤
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Yazaki Corp
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Description

本発明は、電線への好適な端子圧着構造に関する。   The present invention relates to a suitable terminal crimping structure to an electric wire.

従来、自動車等の車両に配索される電線には、銅製の複数の素線を撚り合わせてなる銅電線が用いられていた。ところで近年、車両の軽量化を図るため、アルミニウム又はアルミニウム合金からなる素線を撚り合わせてなるアルミニウム電線が車両の配線材として用いられるようになっている。しかしながら、アルミニウム電線は、銅と比較して素線の外面に形成される酸化皮膜が厚く且つ硬質であり、さらに絶縁性を有している。そのため、導体に端子を圧着しても接触抵抗が高くなってしまう。   Conventionally, a copper electric wire formed by twisting a plurality of copper wires has been used as an electric wire routed in a vehicle such as an automobile. By the way, in recent years, in order to reduce the weight of a vehicle, an aluminum electric wire obtained by twisting strands made of aluminum or an aluminum alloy has been used as a wiring material for a vehicle. However, in the aluminum electric wire, the oxide film formed on the outer surface of the strand is thicker and harder than copper and has an insulating property. Therefore, even if the terminal is crimped to the conductor, the contact resistance is increased.

酸化皮膜を除去し導体と端子との接触抵抗を低くする手段として、端子の内面に端子の長手方向に交差して溝状のセレーションを設け、この端子を導体に圧着する構成が知られている。上記構成によれば素線が電線の長手方向に延伸しセレーションのエッジに摺接することにより、酸化皮膜が引き裂かれ破壊することができる。   As a means for reducing the contact resistance between the conductor and the terminal by removing the oxide film, a configuration is known in which a groove-like serration is provided on the inner surface of the terminal so as to intersect the longitudinal direction of the terminal and the terminal is crimped to the conductor. . According to the said structure, an oxide film can be torn and destroyed when a strand extends in the longitudinal direction of an electric wire and slidably contacts the edge of a serration.

しかしながら、端子を導体に強く圧着した場合、導体の断面積が圧縮し導体に作用する応力が高くなり端子の圧着強度が低下してしまう。一方で、力を弱めて圧着した場合、酸化皮膜を効果的に破壊することができなくなる。   However, when the terminal is strongly crimped to the conductor, the cross-sectional area of the conductor is compressed, the stress acting on the conductor is increased, and the crimping strength of the terminal is reduced. On the other hand, when pressure is weakened and pressure bonding is performed, the oxide film cannot be effectively destroyed.

そこで、下記特許文献１では、アルミニウム電線の導体と端子との接触抵抗の低減と、端子の圧着強度の確保とを目的とした電線への端子圧着構造が提案されている。図１３において電線１０１は、複数の素線１０２を撚り合わせてなる導体１０３を有しており、端末部において絶縁被覆１０４が剥がされ、導体１０３が露出されている。   Therefore, Patent Document 1 below proposes a terminal crimping structure to an electric wire for the purpose of reducing the contact resistance between the conductor of the aluminum electric wire and the terminal and ensuring the crimping strength of the terminal. In FIG. 13, the electric wire 101 has a conductor 103 formed by twisting a plurality of strands 102, and the insulating coating 104 is peeled off at the terminal portion to expose the conductor 103.

露出された導体１０３は、下型１０７に形成された凹部１０８に載置される。そして、断面が略二山形の凹部１０６が形成された上型１０５を下降させ導体１０３を挟み込んで加圧するとともに超音波振動を与える。以上により、凹部１０６，１０８に接する素線１０２の表面の酸化皮膜が破壊され、素線１０２同士が溶接されて図１４に示す所定の形状に形成される（以下、導体１０３を加圧し超音波振動を与え、素線１０２同士を溶接して所定の形状に形成することを「プレフォーミング」という）。   The exposed conductor 103 is placed in a recess 108 formed in the lower mold 107. And the upper mold | type 105 in which the recessed part 106 in which a cross section is substantially 2 shaped was dropped, the conductor 103 was pinched and pressurized, and an ultrasonic vibration was given. As described above, the oxide film on the surface of the wire 102 in contact with the recesses 106 and 108 is broken, and the wires 102 are welded together to form a predetermined shape shown in FIG. Giving vibration and welding the strands 102 together to form a predetermined shape is called “preforming”).

次に、プレフォーミング後の導体１０３を図１４における端子２００の底板部２０１に載置する。そして、加締め部２０２を導体１０３に巻き付けるように加締めていくことにより、電線の端子接続構造１００における電線１０１に対する端子２００の圧着が完了する（図１５参照）。   Next, the pre-formed conductor 103 is placed on the bottom plate portion 201 of the terminal 200 in FIG. And crimping of the terminal 200 with respect to the electric wire 101 in the terminal connection structure 100 of an electric wire is completed by crimping so that the crimping part 202 may be wound around the conductor 103 (refer FIG. 15).

特開２０１１−９０８０４号公報JP 2011-90804 A

ところで、上記従来技術にあっては、導体１０３に端子２００を圧着する作業に先立ち、導体１０３を上型１０５及び下型１０７によって挟み込んで加圧するとともに、超音波振動を与えて素線１０２の外面の酸化皮膜を破壊し、素線１０２同士を溶接して所定の形状に形成する作業（プレフォーミング）を必要とする。従って、作業工数の増加による製造コストの増加という問題点を有している。   By the way, in the above prior art, prior to the operation of crimping the terminal 200 to the conductor 103, the conductor 103 is sandwiched between the upper mold 105 and the lower mold 107 and pressed, and ultrasonic vibration is applied to the outer surface of the strand 102. This requires an operation (preforming) of breaking the oxide film and welding the strands 102 to form a predetermined shape. Therefore, there is a problem of an increase in manufacturing cost due to an increase in work man-hours.

本発明は、上記した事情に鑑みてなされたもので、電線の導体と端子との接触抵抗の低減と端子の圧着強度を維持しつつ、製造コストの低減を図ることができる電線への端子圧着構造を提供することを課題とする。   The present invention has been made in view of the above circumstances, and crimping a terminal to an electric wire that can reduce the manufacturing cost while maintaining the contact resistance between the conductor of the electric wire and the terminal and the crimping strength of the terminal. It is an object to provide a structure.

上記課題を解決するためになされた請求項１記載の本発明の電線への端子圧着構造は、複数の素線からなる導体の外側に絶縁被覆が被覆され、端末部に該導体が露出してなる電線と，前記電線の端末部から露出する導体を圧着する圧着部を有する端子と，を備えてなる電線への端子圧着構造において、
前記導体の複数の素線は、
断面が略円形に形成される断面略円形の素線と，断面が多角形に形成され且つ角として形成されている部分の頂部をエッジ部とする断面多角形の素線とによって構成され、
中心となる一の素線には、前記断面多角形の素線が配置され、
前記一の素線の周囲には、前記断面略円形の素線を配置して層状に形成される第一層を備え、
前記第一層の外周には、前記断面多角形の素線と前記断面略円形の素線を交互に隣接して配置され層状に形成される第二層を備え、
前記第二層の外周には、前記断面多角形の素線と前記断面略円形の素線を交互に隣接して配置して層状に形成する、又は前記断面略円形の素線を複数本置いて前記断面多角形の素線を配置して層状に形成する第三層を備えてなり、
前記端子の底板部に載置する前記複数の素線を該底板部の両側に形成される一対の導体加締め部によって前記端子と前記導体とを圧着接続してなることを特徴とする。
In order to solve the above-mentioned problems, the terminal crimping structure to the electric wire of the present invention according to claim 1 is characterized in that an insulating coating is coated on the outer side of a conductor composed of a plurality of strands, and the conductor is exposed at the terminal portion. a wire comprising a terminal having a crimping portion for crimping the conductor exposed from the end portion of the wire, the terminal crimping structure of the electric wire becomes comprise,
The plurality of strands of the conductor are
The cross section is formed by a substantially circular element wire having a substantially circular cross section, and a polygonal element wire having a cross section formed in a polygonal shape and having a top portion of a portion formed as a corner as an edge ,
The element wire having the cross-sectional polygon is arranged on the one element wire at the center,
Around the one strand, a first layer formed in a layer shape by arranging the strand having a substantially circular cross section,
The outer periphery of the first layer includes a second layer formed in a layered manner in which the strands having a polygonal cross section and the strands having a substantially circular cross section are alternately arranged adjacent to each other.
On the outer periphery of the second layer, the polygonal cross-section strands and the substantially circular cross-section strands are alternately arranged adjacent to each other to form a layer, or a plurality of the substantially circular cross-section strands are placed. A third layer formed by arranging the strands of the polygonal cross section to form a layer,
The plurality of wires placed on the bottom plate portion of the terminal are connected by crimping the terminal and the conductor by a pair of conductor crimping portions formed on both sides of the bottom plate portion .

このような特徴を有する本発明によれば、断面多角形の素線と、断面略円形の素線とが隣接し、断面略円形の素線の外面に断面多角形の素線のエッジ部が接触するため、断面略円形の素線の外面と断面多角形の素線のエッジ部とが接触する部分の接触面積が小さくなる。そうすると、導体を圧着したときの断面略円形の素線と断面多角形の素線との接触圧力が大きくなる。これにより、素線の外面に形成される酸化皮膜に亀裂が生じて破壊され、素線間の接触抵抗が小さくなる。   According to the present invention having such a feature, a strand having a polygonal cross section and a strand having a substantially circular cross section are adjacent to each other, and an edge portion of the strand having a polygonal cross section is formed on the outer surface of the strand having a substantially circular cross section. Because of the contact, the contact area of the portion where the outer surface of the strand having a substantially circular cross section and the edge portion of the strand having a polygonal cross section is reduced is reduced. If it does so, the contact pressure of the strand with a substantially circular cross section when a conductor is crimped | bonded and the strand with a polygonal cross section will become large. Thereby, the oxide film formed on the outer surface of the strands is cracked and broken, and the contact resistance between the strands is reduced.

請求項２記載の本発明の電線への端子圧着構造は、請求項１に記載の電線への端子圧着構造において、前記断面多角形の素線は、前記圧着部の内面と接する前記断面略円形の素線よりも内側に配置することを特徴とする。   The terminal crimping structure to the electric wire of the present invention according to claim 2 is the terminal crimping structure to the electric wire according to claim 1, wherein the polygonal strand is in contact with the inner surface of the crimping portion. It arrange | positions inside the strand of No., It is characterized by the above-mentioned.

このような特徴を有する本発明によれば、断面多角形の素線は、圧着部の内面と接することがなくなる。そうすると、エッジ部は、圧着部の内面と接触することがなく、断面多角形の素線に隣接する断面略円形の素線の外面にエッジ部を効率的に接触させることができる。これにより、酸化皮膜に、より確実に亀裂を生じさせて破壊することができる。   According to the present invention having such a feature, the strand having a polygonal cross section does not contact the inner surface of the crimping portion. If it does so, an edge part does not contact the inner surface of a crimping | compression-bonding part, but can make an edge part contact the outer surface of the strand with a substantially circular cross section adjacent to the strand of a polygonal cross section efficiently. As a result, the oxide film can be more reliably cracked and destroyed.

請求項３記載の本発明の電線への端子圧着構造は、請求項１又は２に記載の電線への端子圧着構造において、前記断面多角形の素線は、前記断面略円形の素線と比較して相対的に硬度が大きいことを特徴とする。   The terminal crimping structure to the electric wire of the present invention according to claim 3 is the terminal crimping structure to the electric wire according to claim 1 or 2, wherein the polygonal strand is compared with the substantially circular strand. And it is characterized by relatively high hardness.

このような特徴を有する本発明によれば、断面多角形の素線は、断面略円形の素線よりも相対的に硬度が大きくなる。そうすると、導体を圧着したとき、断面多角形の素線と比較して相対的に硬度が小さい断面略円形の素線の外面と、断面略円形の素線と比較して相対的に硬度が大きい断面多角形の素線のエッジ部とが接触する。これにより、接触圧力が大きくなるのに加え、硬度の差によって、断面略円形の素線の外面の酸化皮膜に、より確実に亀裂を生じさせて破壊することができる。   According to the present invention having such a feature, the strands having a polygonal cross section are relatively harder than the strands having a substantially circular cross section. Then, when the conductor is crimped, the outer surface of the substantially circular strand having a relatively small hardness compared to the strand having a polygonal cross section and the relatively large hardness compared to the strand having a substantially circular cross section. The edge of the strand having a polygonal cross section comes into contact. Thereby, in addition to the increase in contact pressure, the oxide film on the outer surface of the strand having a substantially circular cross section can be more reliably cracked and broken due to the difference in hardness.

請求項１に記載された本発明によれば、導体を圧着したときの断面略円形の素線と断面多角形の素線との接触圧力が大きくなり、素線の酸化皮膜に亀裂が生じて破壊され素線間の接触抵抗が小さくなる。これにより、導体に超音波振動を与えて素線同士を溶接する工程（プレフォーミング）を必要とせずに酸化皮膜を破壊することができる。従って導体と端子との接触抵抗の低減と端子の圧着強度を維持しつつ、製造コストを低減できるという効果を奏する。   According to the first aspect of the present invention, when the conductor is crimped, the contact pressure between the strand having a substantially circular cross section and the strand having a polygonal cross section is increased, and the oxide film of the strand is cracked. It is destroyed and the contact resistance between the wires is reduced. Thereby, an oxide film can be destroyed, without requiring the process (preforming) which gives an ultrasonic vibration to a conductor and welds strands. Therefore, the manufacturing cost can be reduced while reducing the contact resistance between the conductor and the terminal and maintaining the crimping strength of the terminal.

請求項２に記載された本発明によれば、導体を圧着したとき、断面多角形の素線は、圧着部の内面と接することがなく、隣接する断面略円形の素線の外面にエッジ部を効率的に接触させることができる。従って、素線の酸化皮膜に、より確実に亀裂を生じさせて破壊することができ、素線間の接触抵抗をより低減させ、圧着部抵抗を安定させることができるという効果を奏する。   According to the second aspect of the present invention, when the conductor is crimped, the polygonal cross-section of the strand does not contact the inner surface of the crimping portion, and the edge portion is formed on the outer surface of the adjacent strand having a substantially circular section. Can be efficiently contacted. Therefore, the oxide film of the strands can be more reliably cracked and broken, and the contact resistance between the strands can be further reduced and the crimped portion resistance can be stabilized.

請求項３に記載された本発明によれば、導体を圧着したとき、断面多角形の素線と比較して相対的に硬度が小さい断面略円形の素線の外面と、断面略円形の素線と比較して相対的に硬度が大きい断面多角形の素線のエッジ部とが接触する。従って、接触圧力が大きくなるのに加え、硬度の差によって断面略円形の素線の酸化皮膜に、より確実に亀裂を生じさせて破壊することができ、素線間の接触抵抗をより低減させ、圧着部抵抗を安定させることができるという効果を奏する。   According to the third aspect of the present invention, when the conductor is crimped, the outer surface of the substantially circular strand having a relatively small hardness compared to the polygonal strand, and the substantially circular strand The edge portion of the strand having a polygonal section having a relatively higher hardness than the wire comes into contact. Therefore, in addition to the increase in contact pressure, the oxide film of the wire having a substantially circular cross section can be more reliably cracked and broken due to the difference in hardness, and the contact resistance between the wires can be further reduced. There exists an effect that crimping | compression-bonding part resistance can be stabilized.

本発明に係る電線への端子圧着構造の実施例１を示す分解斜視図である。It is a disassembled perspective view which shows Example 1 of the terminal crimping | compression-bonding structure to the electric wire which concerns on this invention. 図１における電線の断面図である。である。It is sectional drawing of the electric wire in FIG. It is. 図１における電線と端子との圧着方法を説明する図である。It is a figure explaining the crimping | compression-bonding method of the electric wire and terminal in FIG. 電線と端子とを圧着したときの作用を説明する図である。It is a figure explaining an effect | action when crimping | bonding an electric wire and a terminal. 電線と端子とが圧着された状態を示す斜視図、及び圧着部の断面図である。It is the perspective view which shows the state by which the electric wire and the terminal were crimped | bonded, and sectional drawing of a crimping | compression-bonding part. 本発明に係る電線への端子圧着構造の実施例２を構成する電線の断面図である。It is sectional drawing of the electric wire which comprises Example 2 of the terminal crimping structure to the electric wire which concerns on this invention. 本発明に係る電線への端子圧着構造の実施例３を構成する電線の断面図である。It is sectional drawing of the electric wire which comprises Example 3 of the terminal crimping structure to the electric wire which concerns on this invention. 本発明に係る電線への端子圧着構造の実施例４を構成する電線の断面図である。It is sectional drawing of the electric wire which comprises Example 4 of the terminal crimping structure to the electric wire which concerns on this invention. 本発明に係る電線への端子圧着構造の実施例５を構成する電線の断面図である。It is sectional drawing of the electric wire which comprises Example 5 of the terminal crimping | compression-bonding structure to the electric wire which concerns on this invention. 本発明に係る電線への端子圧着構造の実施例６を構成する電線の断面図である。It is sectional drawing of the electric wire which comprises Example 6 of the terminal crimping | compression-bonding structure to the electric wire which concerns on this invention. 本発明に係る電線への端子圧着構造の実施例７を構成する電線の断面図である。It is sectional drawing of the electric wire which comprises Example 7 of the terminal crimping | compression-bonding structure to the electric wire which concerns on this invention. 本発明に係る電線への端子圧着構造の実施例８を構成する電線の断面図である。It is sectional drawing of the electric wire which comprises Example 8 of the terminal crimping structure to the electric wire which concerns on this invention. 従来技術における電線と端子との圧着方法を説明する図である。It is a figure explaining the crimping | compression-bonding method of the electric wire and terminal in a prior art. 図１３に続く図である。It is a figure following FIG. 図１４に続く図である。It is a figure following FIG.

以下、図面に基づいて本発明の実施例について詳細に説明する。   Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

図１−図５には、本発明に係る電線への端子圧着構造の実施例１が示されている。
図１は本発明に係る電線への端子圧着構造の実施例を示す分解斜視図、図２は図１における電線のＡ−Ａ間断面図、図３は図１における電線と端子との圧着方法を説明する図、図４は図２に図示する矢印Ａの指示する部分を拡大した図であって、電線と端子とを圧着したときの作用を説明する図、図５（ａ）は電線と端子とが圧着された状態を示す斜視図、（ｂ）は（ａ）における端子の圧着部のＡ−Ａ間断面図である。なお、図中には、適宜、上下方向、左右方向、及び前後方向を示す矢印を図示している。 1 to 5 show a first embodiment of a terminal crimping structure to an electric wire according to the present invention.
1 is an exploded perspective view showing an embodiment of a terminal crimping structure to an electric wire according to the present invention, FIG. 2 is a cross-sectional view taken along line AA of the electric wire in FIG. 1, and FIG. 3 is a method of crimping the electric wire and the terminal in FIG. FIG. 4 is an enlarged view of a portion indicated by an arrow A shown in FIG. 2, and is a view for explaining an operation when the electric wire and the terminal are crimped. FIG. The perspective view which shows the state by which the terminal was crimped | bonded, (b) is sectional drawing between AA of the crimping | compression-bonding part of the terminal in (a). In the drawing, arrows indicating the up and down direction, the left and right direction, and the front and rear direction are shown as appropriate.

以下の説明において、具体的な形状、材料、数値、方向等は、本発明の理解を容易にするための例示であって、用途、目的、仕様等に合わせて適宜変更することができるものとする。   In the following description, specific shapes, materials, numerical values, directions, and the like are examples for facilitating the understanding of the present invention, and can be appropriately changed according to use, purpose, specifications, and the like. To do.

図１において、引用符号１は、本発明の実施例に係る電線への端子圧着構造を示している。電線への端子圧着構造１は、複数の素線４を撚り合わせてなる導体３を有する電線２と、導体３を圧着する圧着部６を有する端子５とを備えている。以下、先ず電線２の各構成部材について説明する。   In FIG. 1, reference numeral 1 indicates a terminal crimping structure to an electric wire according to an embodiment of the present invention. The terminal crimping structure 1 to an electric wire includes an electric wire 2 having a conductor 3 formed by twisting a plurality of strands 4 and a terminal 5 having a crimping portion 6 for crimping the conductor 3. Hereinafter, first, each component of the electric wire 2 will be described.

電線２は、導体３と、導体３を被覆する絶縁被覆７とを備えて構成されている。絶縁被覆７は、絶縁性を有するポリ塩化ビニル樹脂により形成されている（材料は一例であるものとする。公知の被覆材料から適宜選択したものを用いてもよいものとする）。絶縁被覆７は、導体３を保護することが可能な所定の厚さを有するように設けられている。すなわち、電線２は、絶縁被覆７によって導体３が保護された状態となっている。 The electric wire 2 includes a conductor 3 and an insulating coating 7 that covers the conductor 3. The insulating coating 7 is formed of an insulating polyvinyl chloride resin (the material is an example. A material appropriately selected from known coating materials may be used). The insulating coating 7 is provided so as to have a predetermined thickness capable of protecting the conductor 3 . That is, the electric wire 2 is in a state where the conductor 3 is protected by the insulating coating 7.

次に、図２を用いて電線２の導体３の構造についてより詳細に説明する。なお、図２において、複数の素線４のうち、以下に説明する断面略円形の素線８と、断面多角形の素線９とが配置される位置を明確にするため、断面略円形の素線８にはハッチングを施さず、断面多角形の素線９にはハッチングを施すものとする。
導体３は、導電性を有する金属材料からなる複数の素線４を撚り合わせて、断面が略円形となる形状に形成されている。なお、複数の素線４の金属材料の具体例としては、アルミニウム又はアルミニウムを含む金属、例えば、鉄、マグネシウム等のアルミニウム合金により形成されている。 Next, the structure of the conductor 3 of the electric wire 2 will be described in more detail with reference to FIG. In FIG. 2, among the plurality of strands 4, in order to clarify the position where the strand 8 having a substantially circular cross section and the strand 9 having a polygonal cross section described below are arranged, It is assumed that the strand 8 is not hatched and the strand 9 having a polygonal cross section is hatched.
The conductor 3 is formed in a shape having a substantially circular cross section by twisting together a plurality of strands 4 made of a conductive metal material. In addition, as a specific example of the metal material of the some strand 4, it is formed with aluminum or the metal containing aluminum, for example, aluminum alloys, such as iron and magnesium.

複数の素線４は、断面略円形の素線８と、断面多角形の素線９とに分けられる。断面略円形の素線８は、外面８ａを有し、断面が略円形となる形状に形成されている素線である。また、断面多角形の素線９は、断面が多角形（本実施例においては略四角形）となる形状に形成されている素線である。断面多角形の素線９は、断面において多角形の角として形成されている部分（本実施例においては４つ）の頂点となる部分がエッジ部１０となっている。なお、断面多角形の素線９は、断面略円形の素線８と比較して相対的に硬度が大きくなるように形成されているものとする。   The plurality of strands 4 are divided into strands 8 having a substantially circular cross section and strands 9 having a polygonal cross section. The strand 8 having a substantially circular cross section is a strand having an outer surface 8a and having a substantially circular cross section. The strand 9 having a polygonal cross section is a strand formed in a shape whose cross section is a polygon (substantially rectangular in this embodiment). In the polygonal cross-section wire 9, a portion that is a vertex of a portion (four in this embodiment) formed as a polygon corner in the cross-section is an edge portion 10. It is assumed that the strand 9 having a polygonal cross section is formed to have a relatively higher hardness than the strand 8 having a substantially circular cross section.

導体３は、複数の素線４を撚り合わせて断面が略円環状となる形状をなす複数の層１２を形成して構成されている。複数の層１２は、本実施例において、第一層１３、第二層１４、及び最外層１５の３層から構成されてる（層の数は一例であるものとする）。   The conductor 3 is formed by twisting a plurality of strands 4 to form a plurality of layers 12 having a substantially circular cross section. In the present embodiment, the plurality of layers 12 are composed of three layers of a first layer 13, a second layer 14, and an outermost layer 15 (the number of layers is an example).

本実施例において、引用符号１１が示す一の素線として、断面多角形の素線９が用いられている。そして、一の素線１１（断面多角形の素線９）の外周を包囲するように第一層１３が形成されている。第一層１３は、断面略円形の素線８（本実施例においては６本）が配置され、略円環状となる形状に形成されている。第一層１３に配置されている断面略円形の素線８は、一の素線１１（断面多角形の素線９）と隣接して配置されている。そして、第一層１３の断面略円形の素線８は、一の素線１１（断面多角形の素線９）のエッジ部１０が外面８ａに接触するように配置されている。なお、断面略円形の素線８の外面８ａと、断面多角形の素線９のエッジ部１０とが接触する部分は、接触部分２４とされている。   In the present embodiment, a strand 9 having a polygonal cross section is used as one strand indicated by reference numeral 11. And the 1st layer 13 is formed so that the outer periphery of the one strand 11 (cross-sectional polygonal strand 9) may be surrounded. The first layer 13 is formed in a substantially annular shape in which the strands 8 (six in this embodiment) having a substantially circular cross section are arranged. The strand 8 having a substantially circular cross section disposed in the first layer 13 is disposed adjacent to one strand 11 (a strand 9 having a polygonal cross section). And the strand 8 with the substantially circular cross section of the 1st layer 13 is arrange | positioned so that the edge part 10 of the one strand 11 (cross-sectional polygonal strand 9) may contact the outer surface 8a. A portion where the outer surface 8a of the strand 8 having a substantially circular cross section and the edge portion 10 of the strand 9 having a polygonal cross section is a contact portion 24.

さらに、第一層１３の外周を包囲するように第二層１４が形成されている。第二層１４は、断面略円形の素線８（本実施例においては６本）と、断面多角形の素線９（本実施例においては６本）とが、交互に隣接して配置され、略円環状となる形状に形成されている。そして、第二層１４の断面多角形の素線９は、エッジ部１０が断面多角形の素線９に隣接する断面略円形の素線８の外面８ａに接触するように配置されている。   Further, a second layer 14 is formed so as to surround the outer periphery of the first layer 13. The second layer 14 includes strands 8 (six in this embodiment) having a substantially circular cross section and strands 9 having a polygonal cross section (six in this embodiment) arranged alternately adjacent to each other. It is formed in a substantially annular shape. The strand 9 having a polygonal cross section of the second layer 14 is arranged such that the edge portion 10 contacts the outer surface 8a of the strand 8 having a substantially circular cross section adjacent to the strand 9 having a polygonal cross section.

またさらに、第二層１４の外周を包囲するように最外層１５が形成されている。最外層１５は、断面略円形の素線８（本実施例においては１８本）が配置され、略円環状となる形状に形成されている。そして、最外層１５の断面略円形の素線８は、第二層１４に配置されている断面多角形の素線９のエッジ部１０が外面８ａに接触するように配置されている。なお、最外層１５は、複数の層１２のうち、最も外側に形成されている層となる。   Furthermore, an outermost layer 15 is formed so as to surround the outer periphery of the second layer 14. The outermost layer 15 is formed in a substantially annular shape in which strands 8 (18 in this embodiment) having a substantially circular cross section are arranged. The strand 8 having a substantially circular cross section of the outermost layer 15 is disposed such that the edge portion 10 of the strand 9 having a polygonal cross section disposed in the second layer 14 is in contact with the outer surface 8a. The outermost layer 15 is the outermost layer of the plurality of layers 12.

このように断面略円形の素線８と、断面多角形の素線９とを配置することにより、断面多角形の素線９は、複数の層１２のうち、最外層１５よりも内側（本実施例においては、一の素線１１、第一層１３、及び第二層１４）に配置される構成となっている。従って、断面略円形の素線８は、導体３と後述する端子５（図１参照）の圧着部６（図１参照）との圧着の際、圧着部６の内面と接するように配置されている。そして、断面多角形の素線９は、上記圧着の際、圧着部６の内面と接する断面略円形の素線８よりも内側に配置されている。また、最外層１５よりも内側では、断面略円形の素線８と、断面多角形の素線９とが交互に混在して配置される構成となっている。そして、最外層１５よりも内側に配置された断面多角形の素線９は、最外層１５よりも内側に配置された断面略円形の素線８又は最外層１５に配置された断面略円形の素線８によって外周を包囲されるように配置される構成となっている。   Thus, by arranging the strand 8 having a substantially circular cross section and the strand 9 having a polygonal cross section, the strand 9 having a polygonal cross section is located on the inner side of the outermost layer 15 of the plurality of layers 12 (this In an Example, it has the structure arrange | positioned at the one strand 11, the 1st layer 13, and the 2nd layer 14). Accordingly, the wire 8 having a substantially circular cross section is arranged so as to be in contact with the inner surface of the crimping portion 6 when crimping the conductor 3 and the crimping portion 6 (see FIG. 1) of the terminal 5 (see FIG. 1) described later. Yes. The strand 9 having a polygonal cross section is arranged on the inner side of the strand 8 having a substantially circular cross section in contact with the inner surface of the crimping portion 6 during the crimping. Further, inside the outermost layer 15, the strands 8 having a substantially circular cross section and the strands 9 having a polygonal cross section are alternately mixed and arranged. The strand 9 having a polygonal cross section disposed on the inner side of the outermost layer 15 is a strand 8 having a substantially circular cross section disposed on the inner side of the outermost layer 15 or a substantially circular cross section disposed on the outermost layer 15. It has the structure arrange | positioned so that the outer periphery may be enclosed by the strand 8.

次に、図１に戻り、端子５の構成について説明する。
端子５は、導電性を有する金属材料からなる一定板厚の板材を所定形状にプレス加工することにより形成されている。本実施例において、板材は、銅又は銅合金によって形成されている。また、本実施例において、板材の表面にはスズメッキが施されているものとする。 Next, returning to FIG. 1, the configuration of the terminal 5 will be described.
The terminal 5 is formed by pressing a plate material having a constant plate thickness made of a conductive metal material into a predetermined shape. In the present embodiment, the plate material is made of copper or a copper alloy. In this embodiment, it is assumed that the surface of the plate material is tin-plated.

端子５は、導体３が載置される底板部１６と、底板部１６の左右方向の両側から連続し且つ上下方向における上側に突出して形成される一対の導体加締め部１７とを有している。底板部１６と導体加締め部１７の内側には、端子５の左右方向に複数条（本実施例においては３条）のセレーション１８が設けられている。セレーション１８は、プレスにより溝状に形成されている。底板部１６と導体加締め部１７は、導体３を圧着する圧着部６とされている。   The terminal 5 includes a bottom plate portion 16 on which the conductor 3 is placed, and a pair of conductor caulking portions 17 formed so as to be continuous from both lateral sides of the bottom plate portion 16 and protrude upward in the vertical direction. Yes. Inside the bottom plate portion 16 and the conductor crimping portion 17, a plurality of serrations 18 (three in this embodiment) are provided in the left-right direction of the terminal 5. The serration 18 is formed in a groove shape by pressing. The bottom plate portion 16 and the conductor crimping portion 17 serve as a crimping portion 6 for crimping the conductor 3.

端子５は、さらに、底板部１６の前後方向における前端から連続して設けられ、略円形の取付孔２０が貫通形成されている端子接続部１９と、導体加締め部１７の前後方向の後側において、底板部１６の左右方向の両側から連続し且つ上下方向における上側に突出して形成される一対の絶縁被覆加締め部２１とを有している。   The terminal 5 is further provided continuously from the front end in the front-rear direction of the bottom plate portion 16, and the terminal connection portion 19 through which the substantially circular mounting hole 20 is formed, and the rear side in the front-rear direction of the conductor crimping portion 17. The bottom plate portion 16 has a pair of insulating coating caulking portions 21 that are continuous from both left and right sides and protrude upward in the vertical direction.

次に、図３を用いて導体３を端子５の圧着部６に圧着する方法について説明する。
図３は、一対の導体加締め部１７の先端部を内側に曲げるための凹状型面２２ａを有する上型２２と、底板部１６を載置するために底板部１６と係合可能に形成された載置面２３ａを有する下型２３とが開いた状態を示している。圧着作業を行うのに先立って、予め電線２の端末部の絶縁被覆７を予め剥離し、導体３を露出させる。 Next, a method for crimping the conductor 3 to the crimping portion 6 of the terminal 5 will be described with reference to FIG.
3 is formed so as to be engageable with the bottom plate portion 16 in order to place the upper die 22 having a concave mold surface 22a for bending the tip end portions of the pair of conductor crimping portions 17 inward and the bottom plate portion 16. The lower mold | type 23 which has the mounting surface 23a opened is shown. Prior to performing the crimping operation, the insulation coating 7 at the end portion of the electric wire 2 is peeled off in advance to expose the conductor 3.

次に、下型２３の載置面２３ａ上に底板部１６を載置するとともに、電線２の端末部にて露出された導体２を一対の導体加締め部１７の間に挟まれるように底板部１６上に載置する。   Next, the bottom plate portion 16 is placed on the placement surface 23 a of the lower mold 23, and the conductor 2 exposed at the terminal portion of the electric wire 2 is sandwiched between the pair of conductor crimping portions 17. Place on the part 16.

次に、上型２２を下型２３に対して下降させることにより圧着部６をプレス成形する。すなわち、上型２２の凹状型面２２ａによって導体加締め部１７を徐々に内側に倒していき、最終的に凹状型面２２ａから山形部２２ｂに連なる湾曲面で導体加締め部１７の先端部を折り返すように曲げ、先端部を導体３に食い込ませる。これにより、導体３を包み込むようにして導体加締め部１７を加締める。   Next, the crimping part 6 is press-molded by lowering the upper mold 22 relative to the lower mold 23. That is, the conductor crimping portion 17 is gradually tilted inward by the concave mold surface 22a of the upper mold 22, and finally the tip end portion of the conductor crimping portion 17 is formed by a curved surface continuous from the concave mold surface 22a to the chevron portion 22b. Bend it so that it is folded back, and let the tip end bit into the conductor 3. Thereby, the conductor crimping part 17 is crimped so that the conductor 3 may be wrapped.

次に、図４を用いて導体３と、端子５の圧着部６との圧着における断面略円形の素線８と、断面多角形の素線９との接触による作用について説明する。なお、図４は、図２に図示する矢印Ａが指示する導体３の一部を拡大し、１本の断面略円形の素線８と、１本の断面多角形の素線９のみを表したものである。
図４において、矢印Ｂは、導体加締め部１７（図３参照）による導体３への圧着による接触荷重を表している。矢印Ｂの方向に圧着による接触荷重が加わると、断面略円形の素線８の外面８ａと、断面多角形の素線９のエッジ部１０との接触部分２４は、断面略円形の素線８同士が接触する場合と比較して接触面積が小さくなる。そして、断面略円形の素線８と、断面多角形の素線９との接触部分２４における接触圧力を大きくすることができる。これにより、断面略円形の素線８の外面８ａに形成される酸化皮膜に亀裂を生じさせ、酸化皮膜を破壊することができる。そして、酸化皮膜の破壊により、断面多角形の素線９と、この断面多角形の素線９に隣接する断面略円形の素線８との接触抵抗が低下し、複数の素線４同士の間の接触抵抗を低減することができる。素線４間における接触抵抗の低減を図ることにより、圧着部６における接触抵抗を安定させることができる。 Next, the effect | action by the contact of the strand 8 with a substantially circular cross section and the strand 9 of a cross section in crimping | bonding with the conductor 3 and the crimping | compression-bonding part 6 of the terminal 5 is demonstrated using FIG. 4 is an enlarged view of a part of the conductor 3 indicated by the arrow A shown in FIG. 2, and shows only one strand 8 having a substantially circular cross section and one strand 9 having a polygonal cross section. It is a thing.
In FIG. 4, an arrow B represents a contact load due to the crimping to the conductor 3 by the conductor crimping portion 17 (see FIG. 3). When a contact load is applied by crimping in the direction of arrow B, the contact portion 24 between the outer surface 8a of the strand 8 having a substantially circular cross section and the edge portion 10 of the strand 9 having a polygonal cross section becomes a strand 8 having a substantially circular cross section. The contact area is smaller than when they are in contact with each other. And the contact pressure in the contact part 24 of the strand 8 with a substantially circular cross section and the strand 9 with a cross-sectional polygon can be enlarged. Thereby, a crack is produced in the oxide film formed on the outer surface 8a of the strand 8 having a substantially circular cross section, and the oxide film can be destroyed. Due to the destruction of the oxide film, the contact resistance between the strand 9 having a polygonal cross section and the strand 8 having a substantially circular cross section adjacent to the strand 9 having a polygonal cross section is reduced. The contact resistance between them can be reduced. By reducing the contact resistance between the strands 4, the contact resistance in the crimping part 6 can be stabilized.

次に、図３に戻って、導体３と、端子５の圧着部６との圧着について説明を続ける。 圧着のため一旦下降させた上型２２を上昇させ、導体３と圧着部６との圧着が完了する。上記圧着作業により、図５（ａ）に示す導体３が圧着部６に圧着された電線２を製造することができる。なお、絶縁被覆加締め部２１は、導体３と圧着部６との圧着に先立って、予め電線２の絶縁被覆７を有する部分に加締められる。導体３と圧着部６とが圧着されることにより、導体３と端子５とを電気的及び機械的に強く結合させることができる。   Next, returning to FIG. 3, the description of the crimping between the conductor 3 and the crimping portion 6 of the terminal 5 will be continued. The upper die 22 once lowered for pressure bonding is raised, and the pressure bonding between the conductor 3 and the pressure bonding portion 6 is completed. By the above crimping operation, the electric wire 2 in which the conductor 3 shown in FIG. 5A is crimped to the crimping portion 6 can be manufactured. The insulating coating crimping portion 21 is crimped to a portion of the electric wire 2 having the insulating coating 7 in advance prior to the crimping of the conductor 3 and the crimping portion 6. By crimping the conductor 3 and the crimping portion 6, the conductor 3 and the terminal 5 can be strongly coupled electrically and mechanically.

以上、図１−図５に基づいて説明してきたとおり、本実施例によれば、導体３を圧着したときの断面略円形の素線８と断面多角形の素線９との接触圧力が大きくなり、素線４の酸化皮膜に亀裂が生じて破壊され素線４間の接触抵抗が小さくなる。これにより、従来技術のように導体を加圧して超音波振動を与え、素線同士を溶接し導体を所定の形状に形成する工程（プレフォーミング）を必要とせずに酸化皮膜を破壊することができる。従って、導体３と端子５との接触抵抗の低減と端子５の圧着強度を維持しつつ、製造コストを低減することができる。   As described above with reference to FIGS. 1 to 5, according to this embodiment, the contact pressure between the strand 8 having a substantially circular cross section and the strand 9 having a polygonal cross section when the conductor 3 is crimped is large. Thus, cracks are generated in the oxide film of the wires 4 and the contact resistance between the wires 4 is reduced. As a result, it is possible to destroy the oxide film without requiring a process (preforming) of pressurizing the conductor to apply ultrasonic vibration and welding the strands to form the conductor into a predetermined shape as in the prior art. it can. Therefore, the manufacturing cost can be reduced while reducing the contact resistance between the conductor 3 and the terminal 5 and maintaining the crimping strength of the terminal 5.

また、本実施例によれば、導体３を圧着したとき、断面多角形の素線９は、圧着部６の内面と接することがなく、隣接する断面略円形の素線８の外面８ａにエッジ部１０を効率的に接触させることができる。従って、素線４の酸化皮膜に、より確実に亀裂を生じさせて破壊することができ、素線４間の接触抵抗をより低減させ、圧着部６における抵抗を安定させることができる。   Further, according to the present embodiment, when the conductor 3 is crimped, the strand 9 having a polygonal cross section does not contact the inner surface of the crimping portion 6 and is edged to the outer surface 8a of the adjacent strand 8 having a substantially circular cross section. The part 10 can be contacted efficiently. Therefore, the oxide film of the strand 4 can be more reliably cracked and broken, the contact resistance between the strands 4 can be further reduced, and the resistance in the crimping portion 6 can be stabilized.

さらに、本実施例によれば、導体３を圧着したとき、断面略円形の素線８の外面８ａと、この断面略円形の素線８と比較して相対的に硬度が大きい断面多角形の素線９のエッジ部１０とが接触する。従って、断面略円形の素線８と断面多角形の素線９との接触圧力が大きくなるのに加え、硬度の差によって断面略円形の素線８の酸化皮膜に、より確実に亀裂を生じさせて破壊することができ、素線４間の接触抵抗をより低減させ、圧着部６における抵抗を安定させることができる。   Furthermore, according to the present embodiment, when the conductor 3 is crimped, the outer surface 8a of the strand 8 having a substantially circular cross section and a polygonal cross section having a relatively high hardness compared to the strand 8 having a substantially circular cross section. The edge part 10 of the strand 9 contacts. Accordingly, the contact pressure between the strand 8 having a substantially circular cross section and the strand 9 having a polygonal cross section is increased, and the oxide film of the strand 8 having a substantially circular cross section is more reliably cracked due to the difference in hardness. The contact resistance between the strands 4 can be further reduced, and the resistance in the crimping part 6 can be stabilized.

他の実施例Other examples

図６−図１２には、本発明に係る電線への端子圧着構造の実施例２−８が示されている。
本発明に係る電線への端子圧着構造は、上記実施例１の他、下記実施例２−８の何れを用いてもよいものとする。なお、実施例２−８は、何れも実施例１における電線２を変更した点以外は実施例１と同じである。従って、電線以外の構成の説明は省略する。 FIGS. 6 to 12 show Example 2-8 of a terminal crimping structure to an electric wire according to the present invention.
The terminal crimping structure to the electric wire according to the present invention may use any of the following Examples 2-8 in addition to the above Example 1. Note that Example 2-8 is the same as Example 1 except that the wire 2 in Example 1 is changed. Therefore, description of structures other than an electric wire is abbreviate | omitted.

図６において、実施例２を構成する電線３０は、断面多角形の素線９が複数の層１２のうち最外層１５よりも内側に配置されるのみならず、最外層１５にも配置される構成となっている点において実施例１と異なっている。   In FIG. 6, the electric wires 30 constituting the second embodiment are arranged not only on the innermost side of the outermost layer 15 among the plurality of layers 12 but also on the outermost layer 15. This is different from the first embodiment in the configuration.

図７において、実施例３を構成する電線４０は、断面多角形の素線４１の断面が略三角形となる形状に形成されている点において実施例１と異なっている。断面多角形の素線４１は、断面において多角形の角として形成されている部分（本実施例においては３つ）の頂点となる部分がエッジ部４２となっている。エッジ部４２は、断面が略四角形となる形状に形成される断面多角形の素線９のエッジ部１０と比較して鋭角となって形成されている。   In FIG. 7, the electric wire 40 which comprises Example 3 differs from Example 1 in the point that the cross section of the strand 41 of a polygonal cross section is formed in the shape used as a substantially triangle. In the polygonal cross-section wire 41, the edge portion 42 is a portion that is a vertex of a portion (three in this embodiment) formed as a polygon corner in the cross section. The edge portion 42 is formed with an acute angle as compared with the edge portion 10 of the strand 9 having a polygonal cross section formed in a shape having a substantially square cross section.

図８において、実施例４を構成する電線５０は、断面多角形の素線４１の断面が略三角形となる形状に形成されている点、及び断面多角形の素線４１が複数の層１２のうち最外層１５よりも内側に配置されるのみならず、最外層１５にも配置される構成となっている点において実施例１と異なっている。   In FIG. 8, the electric wire 50 which comprises Example 4 is the point in which the cross section of the strand 41 of a polygonal cross section is formed in the shape which becomes a substantially triangle, and the strand 41 of a cross sectional polygon 41 of the some layer 12 Of these, the second embodiment is different from the first embodiment in that it is arranged not only on the inner side of the outermost layer 15 but also on the outermost layer 15.

図９において、実施例５を構成する電線６０は、断面多角形の素線６１の断面が略五角形となる形状に形成されている点において実施例１と異なっている。断面多角形の素線６１は、断面において多角形の角として形成されている部分（本実施例においては５つ）の頂点となる部分がエッジ部６２となっている。   In FIG. 9, the electric wire 60 which comprises Example 5 differs from Example 1 in the point in which the cross section of the strand 61 of a polygonal cross section is formed in the shape used as a substantially pentagon. In the polygonal cross-section wire 61, a portion that is the apex of a portion (5 in this embodiment) formed as a corner of the polygon in the cross section is an edge portion 62.

図１０において、実施例６を構成する電線７０は、断面多角形の素線６１の断面が略五角形となる形状に形成されている点、及び断面多角形の素線６１が複数の層１２のうち最外層１５よりも内側に配置されるのみならず、最外層１５にも配置される構成となっている点において実施例１と異なっている。   In FIG. 10, the electric wires 70 constituting the sixth embodiment are formed such that the cross section of the polygonal strand 61 has a substantially pentagonal shape, and the polygonal strand 61 has a plurality of layers 12. Of these, the second embodiment is different from the first embodiment in that it is arranged not only on the inner side of the outermost layer 15 but also on the outermost layer 15.

図１１において、実施例７を構成する電線８０は、断面多角形の素線８１の断面が略六角形となる形状に形成されている点において実施例１と異なっている。断面多角形の素線８１は、断面において多角形の角として形成されている部分（本実施例においては６つ）の頂点となる部分がエッジ部８２となっている。断面多角形の素線８１は、断面略円形の素線８に隣接するとともに、エッジ部８２が、隣接するすべての断面略円形の素線８の外面８ａに接触するように配置されている。   In FIG. 11, the electric wire 80 which comprises Example 7 differs from Example 1 in the point in which the cross section of the strand 81 of a cross-sectional polygon is formed in the shape used as a substantially hexagon. In the polygonal section wire 81, a portion that is a vertex of a portion (six in this embodiment) formed as a corner of the polygon in the cross section is an edge portion 82. The strand 81 having a polygonal cross section is disposed adjacent to the strand 8 having a substantially circular cross section, and the edge portion 82 is in contact with the outer surface 8a of all adjacent strands 8 having a substantially circular cross section.

図１２において、実施例８を構成する電線９０は、断面多角形の素線８１の断面が略六角形となる形状に形成されている点、及び断面多角形の素線８１が複数の層１２のうち最外層１５よりも内側に配置されるのみならず、最外層１５にも配置される構成となっている点において実施例１と異なっている。   In FIG. 12, the electric wire 90 which comprises Example 8 is formed in the shape in which the cross section of the strand 81 of a polygonal cross section becomes a substantially hexagonal shape, and the strand 81 of a polygonal cross section is a plurality of layers 12. The first embodiment differs from the first embodiment in that it is arranged not only on the inner side of the outermost layer 15 but also on the outermost layer 15.

実施例２−８によれば、実施例１と同様の効果を奏する他、特に実施例７，８によれば、導体３を圧着したとき、断面多角形の素線８１のエッジ部８２すべてが、隣接するすべての断面略円形の素線８の外面８ａと接触する。これにより、断面多角形の素線８１と、隣接するすべての断面略円形の素線８との間で接触圧力が大きくなる。従って、より効率的に酸化皮膜に亀裂を生じさせ破壊することができ、素線４間の接触抵抗をより低減させ、圧着部６における抵抗を安定させることができる。   According to Example 2-8, in addition to the same effects as in Example 1, in particular, according to Examples 7 and 8, when the conductor 3 is crimped, all the edge portions 82 of the strand 81 having a polygonal cross section are obtained. , Contact with the outer surface 8a of all adjacent strands 8 having a substantially circular cross section. Thereby, a contact pressure becomes large between the strand 81 with a polygonal cross section, and all the adjacent strands 8 with a substantially circular cross section. Therefore, the oxide film can be cracked and broken more efficiently, the contact resistance between the strands 4 can be further reduced, and the resistance in the crimping part 6 can be stabilized.

この他、本発明は本発明の主旨を変えない範囲で種々変更実施可能なことは勿論である。   In addition, the present invention can of course be modified in various ways within the scope not changing the gist of the present invention.

１…電線への端子圧着構造、 ２，３０，４０，５０，６０，７０，８０，９０…電線、 ３…導体、 ４…素線、 ５…端子、 ６…圧着部、 ７…絶縁被覆、 ８…断面略円形の素線、 ８ａ…外面、 ９，４１，６１，８１…断面多角形の素線、 １０，４２，６２，８２…エッジ部、 １１…一の素線、 １２…複数の層、 １３…第一層、 １４…第二層、 １５…最外層、 １６…底板部、 １７…導体加締め部、 １８…セレーション、 １９…端子接続部、 ２０…取付孔、 ２１…絶縁被覆加締め部、 ２２…上型、 ２２ａ…凹状型面、 ２２ｂ…山形部、 ２３…下型、 ２３ａ…載置面、 ２４…接触部分   DESCRIPTION OF SYMBOLS 1 ... Terminal crimping structure to an electric wire 2, 30, 40, 50, 60, 70, 80, 90 ... Electric wire, 3 ... Conductor, 4 ... Elementary wire, 5 ... Terminal, 6 ... Crimp part, 7 ... Insulation coating, 8 ... strand having a substantially circular cross section, 8a ... outer surface, 9, 41, 61, 81 ... polygonal cross-section wire, 10, 42, 62, 82 ... edge portion, 11 ... one strand, 12 ... multiple Layer, 13 ... first layer, 14 ... second layer, 15 ... outermost layer, 16 ... bottom plate portion, 17 ... conductor caulking portion, 18 ... serration, 19 ... terminal connection portion, 20 ... mounting hole, 21 ... insulation coating Clamping part, 22 ... Upper mold, 22a ... Concave mold surface, 22b ... Mountain-shaped part, 23 ... Lower mold, 23a ... Mounting surface, 24 ... Contact part

Claims (3)

複数の素線からなる導体の外側に絶縁被覆が被覆され、端末部に該導体が露出してなる電線と，前記電線の端末部から露出する導体を圧着する圧着部を有する端子と，を備えてなる電線への端子圧着構造において、
前記導体の複数の素線は、
断面が略円形に形成される断面略円形の素線と，断面が多角形に形成され且つ角として形成されている部分の頂部をエッジ部とする断面多角形の素線とによって構成され、
中心となる一の素線には、前記断面多角形の素線が配置され、
前記一の素線の周囲には、前記断面略円形の素線を配置して層状に形成される第一層を備え、
前記第一層の外周には、前記断面多角形の素線と前記断面略円形の素線を交互に隣接して配置され層状に形成される第二層を備え、
前記第二層の外周には、前記断面多角形の素線と前記断面略円形の素線を交互に隣接して配置して層状に形成する、又は前記断面略円形の素線を複数本置いて前記断面多角形の素線を配置して層状に形成する第三層を備えてなり、
前記端子の底板部に載置する前記複数の素線を該底板部の両側に形成される一対の導体加締め部によって前記端子と前記導体とを圧着接続してなる
ことを特徴とする電線への端子圧着構造。 An electric wire in which an insulating coating is coated on the outer side of a conductor composed of a plurality of strands and the conductor is exposed at a terminal portion, and a terminal having a crimping portion for crimping the conductor exposed from the terminal portion of the electric wire. In the terminal crimping structure to the electric wire
The plurality of strands of the conductor are
The cross section is formed by a substantially circular element wire having a substantially circular cross section, and a polygonal element wire having a cross section formed in a polygonal shape and having a top portion of a portion formed as a corner as an edge ,
The element wire having the cross-sectional polygon is arranged on the one element wire at the center,
Around the one strand, a first layer formed in a layer shape by arranging the strand having a substantially circular cross section,
The outer periphery of the first layer includes a second layer formed in a layered manner in which the strands having a polygonal cross section and the strands having a substantially circular cross section are alternately arranged adjacent to each other.
On the outer periphery of the second layer, the polygonal cross-section strands and the substantially circular cross-section strands are alternately arranged adjacent to each other to form a layer, or a plurality of the substantially circular cross-section strands are placed. A third layer formed by arranging the strands of the polygonal cross section to form a layer,
To the electric wire, wherein the plurality of strands placed on the bottom plate portion of the terminal are connected by crimping the terminal and the conductor by a pair of conductor crimping portions formed on both sides of the bottom plate portion . Terminal crimping structure. 請求項１に記載の電線への端子圧着構造において、
前記断面多角形の素線は、
前記圧着部の内面と接する前記断面略円形の素線よりも内側に配置される
ことを特徴とする電線への端子圧着構造。 In the terminal crimping structure to the electric wire according to claim 1,
The strand of polygonal cross section is
A structure for crimping a terminal to an electric wire, wherein the crimping part is disposed on the inner side of the substantially circular element wire in contact with the inner surface of the crimping part. 請求項１又は２に記載の電線への端子圧着構造において、
前記断面多角形の素線は、
前記断面略円形の素線と比較して相対的に硬度が大きい
ことを特徴とする電線への端子圧着構造。 In the terminal crimping structure to the electric wire according to claim 1 or 2,
The strand of polygonal cross section is
A structure for crimping a terminal to an electric wire, characterized in that the hardness is relatively higher than that of the strand having a substantially circular cross section.
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