JP6339451B2 - Terminal, connection structure, wire harness, and terminal manufacturing method - Google Patents

Terminal, connection structure, wire harness, and terminal manufacturing method Download PDF

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JP6339451B2
JP6339451B2 JP2014170955A JP2014170955A JP6339451B2 JP 6339451 B2 JP6339451 B2 JP 6339451B2 JP 2014170955 A JP2014170955 A JP 2014170955A JP 2014170955 A JP2014170955 A JP 2014170955A JP 6339451 B2 JP6339451 B2 JP 6339451B2
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cylindrical
crimping
terminal
electric wire
crimped
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JP2016046170A (en
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三郎 八木
三郎 八木
泰 木原
泰 木原
幸大 川村
幸大 川村
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THE FURUKAW ELECTRIC CO., LTD.
Furukawa Automotive Systems Inc
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Furukawa Automotive Systems Inc
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Description

本発明は、電線の導体部分を収容して圧着可能な圧着部を備える端子、接続構造体、ワイヤーハーネス及び端子の製造方法に関し、特に、自動車のワイヤーハーネスに使用される端子、接続構造体並びに端子の製造方法に関する。   TECHNICAL FIELD The present invention relates to a terminal, a connection structure, a wire harness, and a method for manufacturing a terminal including a crimping portion that accommodates a conductor portion of an electric wire and can be crimped, and in particular, a terminal used in an automobile wire harness, a connection structure, and The present invention relates to a method for manufacturing a terminal.

従来、自動車用組み電線、いわゆるワイヤーハーネスにおける電線と端子との接続は、オープンバレル型と呼ばれる端子で電線をかしめて圧着する圧着接続が一般的である。通常、組み電線には銅あるいは銅合金からなる導体が用いられるが、軽量化を目的としてアルミニウムあるいはアルミニウム合金からなる導体が用いられることがある。この場合、電線の導体が露出した状態で当該導体と端子が圧着されるため、電線の導体がアルミニウムあるいはアルミニウム合金で形成されていると、導体のアルミニウムが腐食して欠損してしまう恐れがあった。   Conventionally, the connection between an electric wire and a terminal in an assembled electric wire for automobiles, so-called wire harness, is generally a crimp connection in which the electric wire is crimped by a terminal called an open barrel type. Usually, a conductor made of copper or a copper alloy is used for the assembled electric wire, but a conductor made of aluminum or an aluminum alloy may be used for the purpose of weight reduction. In this case, since the conductor and the terminal are crimped with the conductor of the wire exposed, if the conductor of the wire is made of aluminum or an aluminum alloy, the conductor aluminum may be corroded and lost. It was.

この問題を解消するために、圧着部全体を樹脂によりモールドする方法が開示されている(例えば、特許文献1)。しかしながら、この方法では、モールド部の肥大に応じて、コネクタハウジングのサイズを大きくする必要があり、それにより、コネクタが肥大化してしまうため、組み電線全体を小型に形成させることができなかった。また、モールド成形は、圧着後に個々の圧着部に対して処理されるため、組み電線の製造工程が増大し、作業が煩雑である等の欠点があった。   In order to solve this problem, a method of molding the entire crimped portion with a resin is disclosed (for example, Patent Document 1). However, according to this method, it is necessary to increase the size of the connector housing in accordance with the enlargement of the mold part, and thereby the connector is enlarged, and thus the entire assembled wire cannot be formed in a small size. Moreover, since molding is processed with respect to each crimping | compression-bonding part after crimping | compression-bonding, there existed a fault that the manufacturing process of an assembled wire increased and the operation | work was complicated.

そこで、板状の金属基材を筒状に丸め、その突き合わせ部あるいは重ね合わせ部をレーザ溶接することにより筒状圧着部を形成し、次いで、筒状圧着部の一端をレーザ溶接により閉塞してなる圧着端子を用い、この筒状圧着部の他端から絶縁被覆の一部を剥いだ電線を挿入して圧着させた接続構造体が開示されている(例えば、特許文献2)。この構造によれば、筒状圧着部内に電線の導体を密閉することができるため、圧着部を肥大化させずに導体を遮断することが可能となっている。   Therefore, a plate-like metal base material is rounded into a cylindrical shape, and the butted portion or the overlapped portion is laser welded to form a cylindrical crimped portion, and then one end of the cylindrical crimped portion is closed by laser welding. There is disclosed a connection structure in which an electric wire having a part of an insulation coating peeled off from the other end of the cylindrical crimp portion is inserted and crimped using a crimp terminal (for example, Patent Document 2). According to this structure, since the conductor of an electric wire can be sealed in the cylindrical crimping part, it is possible to interrupt the conductor without enlarging the crimping part.

特開2011−222243号公報JP 2011-222243 A 特開2014−49334号公報JP 2014-49334 A

上記のような接続構造体を製造する際には、筒状圧着部の挿入口側に形成された被覆圧着部と絶縁被覆を圧着すると共に、該筒状圧着部の閉塞端側に形成された導体圧着部と導体を圧着する。これにより、筒状圧着部内への外部からの水分の侵入を防止され、止水性を実現することが可能となっている。しかしながら、圧着行程後、筒状圧着部の内周面と電線の外周面との間に僅かな隙間が生じることがあり、この僅かな隙間を通って水分等が筒状圧着部内に侵入し、止水性を維持できないという懸念がある。また、自動車に搭載される機械、器具、装置等には長期的な信頼性が求められることから、接続構造体が長期間に亘って止水性を実現することが望ましい。   When manufacturing the connection structure as described above, the cover crimping portion formed on the insertion port side of the cylindrical crimping portion and the insulating coating are crimped and formed on the closed end side of the cylindrical crimping portion. Crimp the conductor crimping part and the conductor. Thereby, the penetration | invasion of the water | moisture content from the outside into a cylindrical crimping | compression-bonding part is prevented, and it becomes possible to implement | achieve water-stop. However, after the crimping process, there may be a slight gap between the inner circumferential surface of the cylindrical crimping portion and the outer circumferential surface of the electric wire, moisture etc. penetrates into the cylindrical crimping portion through this slight gap, There is a concern that the waterstop cannot be maintained. In addition, since long-term reliability is required for machines, appliances, devices, and the like mounted on automobiles, it is desirable that the connection structure achieve water-stopping properties for a long period of time.

本発明の目的は、長期間に亘って止水性を実現し、接続信頼性を向上することができる端子、接続構造体、ワイヤーハーネス及び端子の製造方法を提供することにある。   An object of the present invention is to provide a terminal, a connection structure, a wire harness, and a method for manufacturing a terminal that can achieve water-stopping performance over a long period of time and improve connection reliability.

上記目的を達成するために、本発明の端子は、外部端子と電気的に接続されるコネクタ部と、前記コネクタ部と一体的に形成されるか又は別体で連結され、電線と圧着される筒状圧着部とを備える端子であって、前記筒状圧着部は、突き合わせ溶接によってその長手方向に沿って形成された溶接部と、その厚さ方向に貫通して設けられ且つ周方向に沿って形成された少なくとも1つの溶融部を有し、前記筒状圧着部は、帯状に形成された複数の溶融部を有し、前記複数の溶融部のうち一の溶融部が、他の溶融部と交差して設けられることを特徴とする。
前記溶融部は、前記筒状圧着部と一体的に設けられ、前記筒状圧着部と同一組成であり且つ該筒状圧着部よりも軟質である。
また、前記筒状圧着部は帯状に形成された複数の溶融部を有し、前記複数の溶融部が、それぞれ前記筒状圧着部の長手方向に対して略垂直に延在するのが好ましい。
に、前記筒状圧着部は、電線の絶縁被覆と圧着される被覆圧着部と、該被覆圧着部から前記コネクタ部側に向かって縮径する縮径部と、前記縮径部の更にコネクタ部側に形成され、前記電線の導体と圧着される導体圧着部とを有し、前記溶融部が、前記被覆圧着部の厚み方向に貫通して設けられ且つ周方向に沿って形成されてもよい。
また、上記目的を達成するために、本発明の端子は、外部端子と電気的に接続されるコネクタ部と、前記コネクタ部と一体的に形成されるか又は別体で連結され、電線と圧着される筒状圧着部とを備える端子であって、前記筒状圧着部は、突き合わせ溶接によってその長手方向に沿って形成された溶接部と、その厚さ方向に貫通して設けられ且つ周方向に沿って形成された少なくとも1つの溶融部とを有し、前記筒状圧着部は、帯状に形成された溶融部を有し、前記溶融部は、前記溶接部と離間した位置に形成されていることを特徴とする。
また、上記目的を達成するために、本発明の接続構造体は、外部端子と電気的に接続されるコネクタ部と、前記コネクタ部と一体的に形成されるか又は別体で連結され、電線と圧着される筒状圧着部とを備える端子と、前記端子の前記筒状圧着部に圧着された電線と、を備える接続構造体であって、前記筒状圧着部は、突き合わせ溶接によってその長手方向に沿って形成された溶接部と、前記端子と前記電線が圧着された状態で、その内周面に設けられ且つ該内周面の周方向に沿って形成された少なくとも1つの突条部を有し、前記突条部は、前記筒状圧着部と一体的に設けられ、前記筒状圧着部と同一組成であり且つ該筒状圧着部よりも軟質であることを特徴とする。
た、前記筒状圧着部は帯状に形成された複数の突条部を有し、前記複数の突条部が、それぞれ前記筒状圧着部の長手方向に対して略垂直に延在するのが好ましい。
また、前記筒状圧着部は帯状に形成された複数の突条部を有し、前記複数の突条部のうち一の突条部が、他の突条部と交差して設けられてもよい。
更に、前記筒状圧着部は、電線の絶縁被覆と圧着される被覆圧着部と、該被覆圧着部から前記コネクタ部側に向かって縮径する縮径部と、前記縮径部の更にコネクタ部側に形成され、前記電線の導体と圧着される導体圧着部とを有し、前記突条部が、前記被覆圧着部の内周面に形成されてもよい。
前記端子において、前記筒状圧着部の前記コネクタ部側の端部が閉塞されているのが好ましい。
また、前記電線の導体が、電線の導体又は該導体を複数本撚り合わせて得られる導体撚線であってもよい
更に、前記電線の導体がアルミニウム又はアルミニウム合金からなるのが好ましい。
また、上記接続構造体を少なくとも1つ備えるワイヤーハーネスが提供される。
また上記目的を達成するために、本発明の端子の製造方法は、外部端子と電気的に接続されるコネクタ部と、前記コネクタ部と一体的又は別体で連結され、電線と圧着される筒状圧着部とを備える端子の製造方法であって、金属板材に曲げ加工を施し、前記金属板材の両側縁部を突き合わせて筒状体を成形する工程と、前記筒状体の突き合わせ部をレーザ溶接し、前記筒状体の長手方向に沿って溶接部を形成しながら筒状圧着部を形成する工程と、前記筒状圧着部の外周面にレーザ光を照射し、前記筒状圧着部の周方向に沿ってレーザ光を掃引し、前記筒状圧着部の一部を溶融して固化することにより、前記筒状圧着部の厚さ方向に貫通して設けられた少なくとも1つの溶融部を形成することを特徴とする。
In order to achieve the above object, the terminal of the present invention is a connector part that is electrically connected to an external terminal, and is formed integrally with the connector part or connected separately, and is crimped to an electric wire. A terminal having a cylindrical crimping part, the cylindrical crimping part being provided by welding in the longitudinal direction by butt welding, and provided through the thickness direction and along the circumferential direction have at least one melting portion formed Te, the cylindrical crimping portion includes a plurality of molten portions formed in a strip, one melting portion of the plurality of weld portion, the other fused part characterized Rukoto provided to intersect the.
The melting part is provided integrally with the cylindrical crimping part, has the same composition as the cylindrical crimping part, and is softer than the cylindrical crimping part.
Moreover, it is preferable that the said cylindrical crimping | compression-bonding part has a some fusion | melting part formed in strip | belt shape, and the said some fusion | melting part each extends substantially perpendicularly with respect to the longitudinal direction of the said cylindrical crimping | compression-bonding part.
Further, the said tubular crimp portion includes a coating crimping portion to be crimped with the insulating coating of the electric wire, a reduced diameter portion whose diameter decreases toward the connector portion from the coating crimping portion, further connector of the reduced diameter portion A conductor crimping portion to be crimped to the conductor of the electric wire, and the melting portion is provided through the thickness direction of the covering crimping portion and formed along the circumferential direction. Good.
In order to achieve the above object, the terminal of the present invention includes a connector portion that is electrically connected to an external terminal, and is integrally formed with the connector portion or connected separately, and is crimped to the electric wire. A cylindrical crimping portion, wherein the cylindrical crimping portion is provided through a welded portion formed along a longitudinal direction thereof by butt welding, and provided through the thickness direction and in a circumferential direction. At least one melting part formed along the cylindrical crimping part, the cylindrical crimping part has a melting part formed in a band shape, and the melting part is formed at a position separated from the welding part. It is characterized by being.
In order to achieve the above object, a connection structure according to the present invention includes a connector portion that is electrically connected to an external terminal, and is integrally formed with the connector portion or connected separately. And a terminal having a cylindrical crimping portion to be crimped, and an electric wire crimped to the cylindrical crimping portion of the terminal , wherein the cylindrical crimping portion is elongated by butt welding. A welded portion formed along the direction, and at least one ridge formed on the inner peripheral surface of the welded portion and the terminal and the electric wire in a crimped state, and formed along the circumferential direction of the inner peripheral surface have a, the ridges, the tubular crimp portion provided integrally with, and wherein the soft der Rukoto than the tubular crimping portion is the same composition as and cylindrical crimping portion.
Also, the tubular crimp portion has a plurality of protrusions formed in a band shape, the plurality of protrusions is substantially perpendicular to extend to the longitudinal direction of each of the tubular crimp portion Is preferred.
In addition, the cylindrical crimp part has a plurality of ridges formed in a band shape, and one ridge of the plurality of ridges may be provided to intersect with another ridge. Good.
Further, the cylindrical crimping portion includes a coated crimping portion to be crimped to the insulation coating of the electric wire, a reduced diameter portion that is reduced in diameter from the coated crimped portion toward the connector portion, and a connector portion further to the reduced diameter portion. It has a conductor crimping part formed in the side and crimped | bonded with the conductor of the said electric wire, and the said protrusion part may be formed in the internal peripheral surface of the said coating crimping part.
In the terminal, it is preferable that an end portion of the cylindrical crimp portion on the connector portion side is closed.
The conductor of the electric wire may be a conductor stranded wire obtained by mating a plurality of twisted conductor or conductor of the wire.
Furthermore, the conductor of the electric wire is preferably made of aluminum or an aluminum alloy.
Moreover, the wire harness provided with at least one said connection structure is provided.
In order to achieve the above object, a method of manufacturing a terminal according to the present invention includes a connector part that is electrically connected to an external terminal, and a cylinder that is integrally or separately connected to the connector part and is crimped to an electric wire. A method of manufacturing a terminal including a crimped portion, comprising: bending a metal plate material, butting both side edges of the metal plate material to form a cylindrical body; and a laser for the butted portion of the cylindrical body. Welding, forming a welded portion along the longitudinal direction of the tubular body, forming a tubular crimp portion, irradiating the outer circumferential surface of the tubular crimp portion with laser light, and By sweeping a laser beam along the circumferential direction and melting and solidifying a part of the cylindrical crimping portion, at least one melting portion provided penetrating in the thickness direction of the cylindrical crimping portion It is characterized by forming.

本発明によれば、筒状圧着部は、その厚さ方向に貫通して設けられ且つ周方向に沿って形成された少なくとも1つの溶融部を有するので、端子に電線を圧着する際、溶融部が内側に膨出し易くなり、筒状圧着部の内周面と電線の外周面との密着性が向上し、これらの界面における長手方向の水分の侵入が阻止される。よって、長期間に亘って止水性を実現することができ、機械的、電気的な接続信頼性を向上することができる。また、筒状圧着部が、その内周面に設けられ且つ該内周面の周方向に沿って形成された少なくとも1つの突条部を有することによっても、上記と同様の効果を奏することができる。   According to the present invention, the cylindrical crimping portion has at least one melting portion provided so as to penetrate in the thickness direction and formed along the circumferential direction. Therefore, when crimping the electric wire to the terminal, the melting portion Becomes easier to bulge inward, and the adhesion between the inner peripheral surface of the cylindrical crimp portion and the outer peripheral surface of the electric wire is improved, and the penetration of moisture in the longitudinal direction at these interfaces is prevented. Therefore, it is possible to achieve water-stopping performance for a long period of time, and to improve mechanical and electrical connection reliability. Also, the cylindrical crimping portion can provide the same effect as described above by having at least one protrusion provided on the inner peripheral surface and formed along the circumferential direction of the inner peripheral surface. it can.

また、溶融部又は突条部は、筒状圧着部に一体的に設けられ、筒状圧着部と同一組成であり且つ該筒状圧着部よりも軟質であるので、溶融部又は突条部の延性により、圧着時にこれらが変形して筒状圧着部の内周面と電線外周面との間の隙間を埋めることができ、止水性を更に向上することができる。   In addition, the melting part or the ridge part is provided integrally with the cylindrical crimp part, and has the same composition as the cylindrical crimp part and is softer than the cylindrical crimp part. Due to the ductility, these can be deformed during crimping to fill the gap between the inner circumferential surface of the tubular crimping portion and the outer circumferential surface of the electric wire, and the waterstop can be further improved.

また、筒状圧着部は帯状に形成された複数の溶融部又は突条部を有し、該複数の溶融部又は突条部が、それぞれ筒状圧着部の長手方向に対して略垂直に延在するので、筒状圧着部の長手方向に進行する水分に対して複数段の堰部を形成することができ、筒状圧着部内に収容された導体に水分が到達するのを確実に阻止することができる。   Further, the cylindrical crimping portion has a plurality of melting portions or ridges formed in a band shape, and the plurality of melting portions or ridges extend substantially perpendicular to the longitudinal direction of the cylindrical crimping portion. As a result, a plurality of dam portions can be formed with respect to the moisture traveling in the longitudinal direction of the cylindrical crimping portion, and moisture is reliably prevented from reaching the conductor accommodated in the cylindrical crimping portion. be able to.

また、本発明によれば、筒状圧着部の外周面にレーザ光を照射しながら筒状圧着部の周方向に沿ってレーザ光を掃引し、筒状圧着部の一部を溶融して固化することにより、筒状圧着部に少なくとも1つの溶融部を形成するので、上記同様の効果を奏することができる。また、筒状圧着部を形成する際に用いられるレーザ光を使用して溶融部を形成するので、溶融部又は突条部を形成するための他の金属材料や装置を必要とせず、溶融部又は突条部を容易に形成することができ、生産性に優れる。   Further, according to the present invention, laser light is swept along the circumferential direction of the cylindrical crimping portion while irradiating the outer peripheral surface of the cylindrical crimping portion with laser light, and a part of the cylindrical crimping portion is melted and solidified. By doing so, at least one melting part is formed in the cylindrical crimping part, so that the same effect as described above can be obtained. In addition, since the melted portion is formed using the laser beam used when forming the cylindrical crimping portion, no other metal material or device for forming the melted portion or the ridge portion is required, and the melted portion Or a protrusion part can be formed easily and it is excellent in productivity.

本発明の実施形態に係る端子の構成を概略的に示す図であり、(a)は全体斜視図、(b)は図1の線X−Xに沿う接続構造体の断面図である。It is a figure which shows schematically the structure of the terminal which concerns on embodiment of this invention, (a) is a whole perspective view, (b) is sectional drawing of the connection structure in alignment with line XX of FIG. 図1における溶融部の変形例を示す斜視図である。It is a perspective view which shows the modification of the fusion | melting part in FIG. 本実施形態に係る端子の製造方法を示すフローチャートである。It is a flowchart which shows the manufacturing method of the terminal which concerns on this embodiment. (a)〜(f)は、端子の製造方法を説明する平面図である。(A)-(f) is a top view explaining the manufacturing method of a terminal. 図1の端子の変形例を示す図であり、(a)は全体斜視図、(b)は(a)の線Y−Yに沿う断面図である。It is a figure which shows the modification of the terminal of FIG. 1, (a) is a whole perspective view, (b) is sectional drawing which follows the line YY of (a). 図1の端子の他の変形例を示す縦断面図である。It is a longitudinal cross-sectional view which shows the other modification of the terminal of FIG. 本実施形態に係る接続構造体の製造方法の一例を説明する断面図である。It is sectional drawing explaining an example of the manufacturing method of the connection structure which concerns on this embodiment. 図6の製造方法により製造された接続構造体を概略的に示す図であり、(a)は全体斜視図、(b)は(a)における線Z−Zに沿う断面図である。It is a figure which shows schematically the connection structure manufactured by the manufacturing method of FIG. 6, (a) is a whole perspective view, (b) is sectional drawing in alignment with line ZZ in (a).

図1は、本実施形態に係る端子を有する接続構造体の構成を概略的に示す図であり、(a)は全体斜視図、(b)は図1の線A−Aに沿う接続構造体の断面図である。なお、図1における接続構造体および端子は、その一例を示すものであり、本発明に係るそれぞれの部分の構成、各構成の形状、寸法等は、図1のものに限られないものとする。   1A and 1B are diagrams schematically showing a configuration of a connection structure having terminals according to the present embodiment, in which FIG. 1A is an overall perspective view, and FIG. 1B is a connection structure along line AA in FIG. 1. FIG. Note that the connection structure and the terminal in FIG. 1 show an example, and the configuration of each part, the shape, size, etc. of each configuration according to the present invention are not limited to those in FIG. .

本実施形態の端子1は、不図示の外部端子と電気的に接続されるコネクタ部10と、該コネクタ部とトランジション部20を介して設けられ、不図示の電線と圧着される筒状圧着部30とを備えている。本実施形態では、コネクタ部10と筒状圧着部30とが一体成形されるが、コネクタ部と筒状圧着部を別体で成形し、これらを連結することで端子を作製してもよい。   The terminal 1 of this embodiment is provided with a connector part 10 electrically connected to an external terminal (not shown), and a tubular crimp part provided via the connector part and the transition part 20 and crimped to an electric wire (not shown). 30. In this embodiment, the connector part 10 and the cylindrical crimp part 30 are integrally formed. However, the connector part and the cylindrical crimp part may be formed separately and connected to each other to produce a terminal.

端子1は、金属基体からなり、この金属基体を金属材料(銅、アルミニウム、鉄、またはこれらを主成分とする合金等)からなる母材のみで構成してもよいが、導電性と強度を確保するために母材上に金属を主成分とするめっき層を形成してもよい。   The terminal 1 is made of a metal substrate, and the metal substrate may be composed only of a base material made of a metal material (copper, aluminum, iron, or an alloy containing these as a main component). In order to ensure, a plating layer containing a metal as a main component may be formed on the base material.

コネクタ部10は、例えば雄型圧着端子等の挿入タブの挿入を許容するボックス部である。本実施形態におけるコネクタ部10は、挿入タブを収容するための収容口11を有しているが、コネクタ部の細部の形状は、特に限定されない。例えば、本発明の端子の他の実施形態として、雄型端子の長尺状の接続部(挿入タブ)を有する構造であってもよい。すなわち、コネクタ部10は、外部端子と係止あるいは嵌合して電気的に接続し得るものであれば、いかなる形状を有していてもよい。本実施形態では、本発明の端子を説明するために便宜的に雌型端子の例を示している。   The connector portion 10 is a box portion that allows insertion of an insertion tab such as a male crimp terminal. Although the connector part 10 in this embodiment has the accommodating port 11 for accommodating an insertion tab, the shape of the detail of a connector part is not specifically limited. For example, as another embodiment of the terminal of the present invention, a structure having a long connection portion (insertion tab) of a male terminal may be used. In other words, the connector portion 10 may have any shape as long as it can be electrically connected by locking or fitting with an external terminal. In this embodiment, an example of a female terminal is shown for the sake of convenience in order to describe the terminal of the present invention.

トランジション部20は、コネクタ部10と筒状圧着部30の橋渡しとなる部分である。立体的に形成されていても、平面的に形成されていても良い。端子長手方向の折り曲げに対する機械的強度の観点からは、長手方向の断面2次モーメントが大きくなるように設計するのが好ましい。   The transition part 20 is a part that serves as a bridge between the connector part 10 and the cylindrical crimp part 30. It may be formed three-dimensionally or two-dimensionally. From the viewpoint of mechanical strength against bending in the longitudinal direction of the terminal, it is preferable to design such that the second moment of section in the longitudinal direction is increased.

筒状圧着部30は、トランジション部20側が閉塞された筒部材であって、電線が挿入される挿入口31と、電線の絶縁被覆と圧着される被覆圧着部32と、電線の導体と圧着される導体圧着部33と、該導体圧着部からトランジション部20側に向かって縮径する縮径部34とを有している。この筒状圧着部30は、例えば溶接により一端が閉塞された筒状に形成される。具体的には、平面展開した金属基体を立体的にプレス加工することで、断面が略C字型となる筒状体が形成され、この筒状体の開放部分(突き合わせ部)がレーザ溶接される。溶接は筒状体の長手方向に行われるので、突き合わせ溶接によってその長手方向と略同一の方向に溶接部35a(溶接ビード)が形成されると共に、筒状圧着部が形成される。この溶接部35aは、線状又は帯状に形成される。また、筒状圧着部を形成する溶接の後、トランジション部側の筒状圧着部の端部も端部溶接部37によって封止されるのが好ましい。この封止は端子の長手方向に対して垂直な方向に行われる。この封止によって、トランジション部20側から水分等が浸入するのを防止する。   The cylindrical crimping part 30 is a cylindrical member with the transition part 20 side closed, and is inserted into an insertion port 31 into which an electric wire is inserted, a coated crimping part 32 to be crimped to an insulating coating of the electric wire, and a conductor of the electric wire. A conductor crimping portion 33 and a diameter-reduced portion 34 that reduces the diameter from the conductor crimping portion toward the transition portion 20 side. The cylindrical crimp part 30 is formed in a cylindrical shape whose one end is closed by welding, for example. Specifically, a cylindrical body having a substantially C-shaped cross section is formed by three-dimensionally pressing a flatly developed metal base, and an open portion (butting portion) of the cylindrical body is laser welded. The Since welding is performed in the longitudinal direction of the cylindrical body, a welded portion 35a (weld bead) is formed in the substantially same direction as the longitudinal direction by butt welding, and a cylindrical crimping portion is formed. The weld 35a is formed in a linear shape or a strip shape. Moreover, it is preferable that the end of the cylindrical crimping part on the transition part side is also sealed by the end welded part 37 after welding for forming the cylindrical crimping part. This sealing is performed in a direction perpendicular to the longitudinal direction of the terminal. This sealing prevents moisture and the like from entering from the transition portion 20 side.

被覆圧着部32は、図1(b)に示すように、その厚さ方向に貫通して設けられ且つ周方向に沿って形成された2つの溶融部36a,36aを有する。本実施形態では溶融部36a,36aはそれぞれ、筒状圧着部30の長手方向に対して略垂直に延在している。なお説明の便宜上、本実施形態では溶融部が2つ設けられる場合を例に挙げたが、これに限らず、溶融部が1つ設けられてもよく、また3つ以上設けられてもよい。また本実施形態では、溶融部36aが、被覆圧着部32の内周面32aの周方向の一部(被覆圧着部の上部)に形成されているが、これに限らず、溶融部が、被覆圧着部の全周に亘って形成されても良い。すなわち、図2に示すように、溶融部36a’,36a’が被覆圧着部32の周面に沿って環状に形成されてもよい。また、本実施形態では、溶融部36a,36aが帯状に形成されているが、ドット状や、ブロック状など、他の形状で形成されてもよい。   As shown in FIG. 1B, the covering crimping portion 32 has two melting portions 36a and 36a that are provided so as to penetrate in the thickness direction and are formed along the circumferential direction. In the present embodiment, the melting portions 36 a and 36 a each extend substantially perpendicular to the longitudinal direction of the cylindrical crimp portion 30. For convenience of explanation, in the present embodiment, the case where two melting parts are provided is described as an example. However, the present invention is not limited to this, and one melting part may be provided, or three or more melting parts may be provided. Moreover, in this embodiment, although the fusion | melting part 36a is formed in a part of circumferential direction of the inner peripheral surface 32a of the coating crimping part 32 (upper part of a coating crimping part), not only this but a fusion | melting part is covered. You may form over the perimeter of a crimping | compression-bonding part. That is, as shown in FIG. 2, the melted portions 36 a ′ and 36 a ′ may be formed in an annular shape along the peripheral surface of the cover crimping portion 32. In the present embodiment, the melted portions 36a and 36a are formed in a band shape, but may be formed in other shapes such as a dot shape or a block shape.

溶融部36aは、筒状圧着部30と一体的に設けられており、該筒状圧着部と同一組成であり且つ該筒状圧着部の母材よりも軟質である。このような性状の溶融部36aは、例えば筒状圧着部36の一部に上方からレーザ光を照射し、筒状圧着部30の一部を溶融して固化することにより形成することができる。このとき、被覆圧着部32には溶融部36aが形成されるのみで、内周面32aに突条部が形成されないが、電線との圧着時に筒状圧着部に圧縮応力が生じることで、溶融部36aに相当する軟質部(焼きなまし部)が筒状圧着部の内方(内部空間側)に膨出し、これにより被覆圧着部32の内周面32aに突条部36が形成される。   The melting part 36a is provided integrally with the cylindrical crimping part 30, has the same composition as the cylindrical crimping part, and is softer than the base material of the cylindrical crimping part. The melting part 36a having such a property can be formed, for example, by irradiating a part of the cylindrical crimping part 36 with laser light from above and melting and solidifying a part of the cylindrical crimping part 30. At this time, only the melting part 36a is formed in the coated crimping part 32, and no protrusion is formed on the inner peripheral surface 32a. However, when the crimping part is crimped with the electric wire, a compressive stress is generated in the cylindrical crimping part. A soft portion (annealed portion) corresponding to the portion 36 a bulges inward (inside the inner space) of the cylindrical crimp portion, and thereby, a protrusion 36 is formed on the inner peripheral surface 32 a of the covering crimp portion 32.

ただし、電線との圧着前に、被覆圧着部32の内周面32aに突条部が予め形成されてもよい。この場合、被覆圧着部32は、図1(c)に示すように、その内周面32aに設けられ且つ該内周面の周方向に沿って形成された2つの突条部36,36を有する。突条部36,36はそれぞれ、内周面32aから被覆圧着部32の径方向内方に向かって突出しており、筒状圧着部30の長手方向に対して略垂直に延在している(図1(a))。被覆圧着部32の外周面32b上であって突条部36,36の直上位置には、溶融部36a,36aが形成されている。   However, the ridges may be formed in advance on the inner peripheral surface 32a of the coated crimping part 32 before crimping with the electric wire. In this case, as shown in FIG. 1 (c), the cover crimping portion 32 includes two protrusions 36, 36 provided on the inner peripheral surface 32 a and formed along the circumferential direction of the inner peripheral surface. Have. Each of the protrusions 36, 36 protrudes from the inner peripheral surface 32 a toward the inside in the radial direction of the covering crimping portion 32, and extends substantially perpendicular to the longitudinal direction of the cylindrical crimping portion 30 ( FIG. 1 (a)). Melting portions 36 a and 36 a are formed on the outer peripheral surface 32 b of the covering crimping portion 32 and immediately above the protrusions 36 and 36.

突条部36は、筒状圧着部30と一体成形され、該筒状圧着部と同一組成であり且つ該筒状圧着部の母材よりも軟質である。このような性状の突条部36は、溶融部36aの場合と同様、筒状圧着部36の一部に上方からレーザ光を照射し、筒状圧着部30の一部を溶融して固化することにより形成される。そして、レーザ光の熱エネルギーで溶融した母材が下方(筒状圧着部の内方)に膨出し、そのまま固化することで、母材が焼なまされてなる延性の突条部が形成される。   The protruding portion 36 is integrally formed with the cylindrical crimp portion 30, has the same composition as the cylindrical crimp portion, and is softer than the base material of the cylindrical crimp portion. As in the case of the melting portion 36a, the protruding portion 36 having such a property irradiates a part of the cylindrical crimping portion 36 with laser light from above, and melts and solidifies a part of the cylindrical crimping portion 30. Is formed. Then, the base material melted by the thermal energy of the laser beam bulges downward (inward of the cylindrical crimping portion) and solidifies as it is, thereby forming a ductile ridge portion formed by annealing the base material. The

筒状圧着部30では、導体が露出した電線端部を挿入口31に挿入した状態で筒状圧着部30を加締めることで、被覆圧着部32、導体圧着部33及び縮径部34およびが塑性変形して電線の絶縁被覆および導体と圧着され、これにより、筒状圧着部30と電線とが機械的、電気的に接続される。そして圧着の際、母材よりも軟質である溶融部36a,36aが内周面32aから突出することにより突条部が形成されると共に、この突条部が電線の絶縁被覆との間で母材よりも大きく塑性変形することにより、被覆圧着部32と電線の絶縁被覆との界面に生じる微小隙間が埋められる。また、レーザ照射時に被覆圧着部32の内周面32aに突条部36,36を形成した場合、圧着時に、当該突条部が被覆圧着部32と電線の絶縁被覆との間で母材よりも大きく塑性変形し、これにより被覆圧着部32と電線の絶縁被覆との界面に生じる微小隙間が埋められる。   In the tubular crimping portion 30, the coated crimping portion 32, the conductor crimping portion 33, the reduced diameter portion 34, and the like are formed by crimping the tubular crimping portion 30 in a state where the end of the electric wire with the exposed conductor is inserted into the insertion port 31. It is plastically deformed and crimped to the insulation coating and the conductor of the electric wire, whereby the cylindrical crimping portion 30 and the electric wire are mechanically and electrically connected. When crimping, the melted portions 36a, 36a, which are softer than the base material, protrude from the inner peripheral surface 32a, thereby forming a ridge portion. By plastically deforming larger than the material, a minute gap generated at the interface between the coated crimp portion 32 and the insulating coating of the electric wire is filled. Further, when the protrusions 36 and 36 are formed on the inner peripheral surface 32a of the coated crimping part 32 at the time of laser irradiation, at the time of crimping, the projected protruding part is formed by the base material between the coated crimping part 32 and the insulation coating of the electric wire. Is greatly plastically deformed, thereby filling a minute gap generated at the interface between the coated crimp portion 32 and the insulating coating of the electric wire.

図3は、図1の端子の製造方法を示すフローチャートであり、図4(a)〜(f)は、図1の端子の製造方法を説明する平面図である。なお、図4は板材41(端子原板)から端子が製造される様子を板材のND方向(板面に対して垂直な方向)から見た図である。   FIG. 3 is a flowchart showing a method of manufacturing the terminal of FIG. 1, and FIGS. 4A to 4F are plan views for explaining the method of manufacturing the terminal of FIG. FIG. 4 is a view of the state in which the terminal is manufactured from the plate material 41 (terminal original plate), as viewed from the ND direction (direction perpendicular to the plate surface) of the plate material.

先ず、銅または銅合金の金属基体からなる板材を圧延して、所定厚さ、例えば0.25mmの板材41を作製する(ステップS21)。このとき、基体のRD方向(圧延方向)は、金属基体からなる板材の長手方向のことを指す(図4(a))。また、必要に応じて、母材からなる板材41全体にめっき層を設けて金属基体を形成し、あるいは母材からなる板材41をマスクした状態で任意の部分にめっき層を設けて金属基体を形成する。めっき層はめっき処理で設けられ、めっき層の材料として、例えばすず、銀、金めっきなどが挙げられる。   First, a plate material made of a copper or copper alloy metal substrate is rolled to produce a plate material 41 having a predetermined thickness, for example, 0.25 mm (step S21). At this time, the RD direction (rolling direction) of a base | substrate points out the longitudinal direction of the board | plate material which consists of a metal base | substrate (FIG. 4 (a)). Further, if necessary, a metal layer is formed by providing a plating layer on the entire plate 41 made of a base material, or a metal layer is formed by providing a plating layer on an arbitrary portion in a state where the plate 41 made of the base material is masked. Form. The plating layer is provided by a plating process, and examples of the material of the plating layer include tin, silver, and gold plating.

この金属基体からなる板材41を、プレス加工(1次プレス)にて、複数の圧着端子が平面展開した状態となるように、繰り返し形状で打ち抜く(ステップS22)。本プレス加工では、各被処理体を片端で支持するいわゆる片持ち型の被処理体が作製され、送り穴42bが等間隔で形成されたキャリア部42aに、コネクタ部用板状体43と、圧着部用板状体44が一体で形成されている(図4(b))。このとき、繰り返し形状の構成単位となる板状部位(端子原板)は、RD方向に関して所定ピッチで配列されており、後に形成される筒状圧着部の長手方向がRD方向に対して略垂直(TD方向)となるように打ち抜かれる。なお、本プレス加工後に母材にめっき層を設けて金属基体としても良い。すなわち、プレス加工後にめっき処理を施してもよい。   The plate material 41 made of this metal substrate is punched in a repetitive shape by pressing (primary pressing) so that a plurality of crimp terminals are in a flattened state (step S22). In this press working, a so-called cantilevered object to be processed that supports each object to be processed at one end is produced, and a connector part plate 43 and a carrier part 42a in which feed holes 42b are formed at equal intervals, A plate-like body 44 for the crimping part is integrally formed (FIG. 4B). At this time, the plate-like portions (terminal original plates) serving as repetitive structural units are arranged at a predetermined pitch with respect to the RD direction, and the longitudinal direction of the cylindrical crimp portion formed later is substantially perpendicular to the RD direction ( (TD direction). In addition, it is good also as a metal base | substrate by providing a base material with a plating layer after this press work. That is, you may perform a plating process after press work.

次に、繰り返し形状の構成単位となる各板状部位に曲げ加工を施して(2次プレス)、コネクタ部45と、筒状圧着部とするための圧着部用筒状体46とを形成する(ステップS23)。このとき、圧着部用筒状体46の長手方向に垂直な断面は、隙間がごく微小な略C字型となっている。この隙間を介した基体の端面同士を突き合わせ部47と呼ぶ(図4(c))。   Next, bending is performed on each plate-like portion serving as a structural unit of a repetitive shape (secondary press) to form a connector portion 45 and a crimping portion tubular body 46 for forming a tubular crimp portion. (Step S23). At this time, the cross section perpendicular to the longitudinal direction of the crimping part tubular body 46 is substantially C-shaped with a very small gap. The end faces of the base body through this gap are referred to as a butting portion 47 (FIG. 4C).

その後、圧着部用筒状体46の上方から例えばレーザ光を照射し、突き合わせ部47に沿って図中の矢印A方向に掃引し、当該部分にレーザ溶接を施す(図4(d)、ステップS24)。これにより突き合わせ部47が溶着し、筒状圧着部48が形成される。このレーザ溶接は、例えばファイバレーザを用いて実行される。レーザ溶接機は、溶接中の焦点位置を立体的に調整可能なものを用いることで、筒状体の縮径部などを立体的に溶接することができる。   Thereafter, for example, laser light is irradiated from above the crimping portion cylindrical body 46, and is swept in the direction of arrow A in the drawing along the abutting portion 47, and laser welding is performed on the portion (FIG. 4D), step. S24). As a result, the butted portion 47 is welded, and the cylindrical crimping portion 48 is formed. This laser welding is performed using, for example, a fiber laser. The laser welding machine can three-dimensionally weld the reduced diameter portion of the cylindrical body by using a laser welding machine that can adjust the focal position during welding three-dimensionally.

また、筒状圧着部を形成した溶接の後、筒状圧着部48のトランジション部側の端部(電線挿入口と反対側の端部)を溶接によって封止する(図4(e))。この封止では、レーザ光を端子長手方向(筒状圧着部長手方向)に対して垂直な方向(図中の矢印B方向)に掃引することによって行われる。この溶接は、金属基材(あるいは金属部材)が折り重なった部分を、折り重なった部分の上方からレーザ光を照射することにより行われる。この封止により、筒状圧着部48の幅全体に亘って延在する端部溶接部49が形成され、筒状圧着部48のトランジション部側の端部が閉塞される。   Moreover, after the welding which formed the cylindrical crimp part, the edge part (end part on the opposite side to an electric wire insertion port) of the cylindrical crimp part 48 is sealed by welding (FIG.4 (e)). This sealing is performed by sweeping laser light in a direction (arrow B direction in the drawing) perpendicular to the terminal longitudinal direction (cylindrical crimping portion longitudinal direction). This welding is performed by irradiating a portion where the metal base material (or metal member) is folded with a laser beam from above the folded portion. By this sealing, an end welded portion 49 extending across the entire width of the tubular crimping portion 48 is formed, and the end of the tubular crimping portion 48 on the transition side is closed.

次に、筒状圧着部48の上方から、該筒状圧着部の外周面のうち被覆圧着部に相当する部分にレーザ光を照射する。そして、筒状圧着部48の周方向に沿ってレーザ光を掃引し、筒状圧着部48の一部を線状に溶融して固化することにより、筒状圧着部48の厚さ方向に貫通して設けられた2つの溶融部50,50を形成する(ステップS25、図4(f))。なお、上述したように、本ステップにおけるレーザ照射時に、筒状圧着部48の内周面に2つの突条部を形成してもよい。本ステップの溶融部/突条部形成は、例えば上記のステップS24で使用されたものと同じレーザ光を用い、同様のレーザ駆動条件、掃引速度、スポット径にて実行することができる。レーザ光の掃引方向は、RD方向、すなわち筒状圧着部48の長手方向に対して垂直な方向(図中の矢印C方向)であり、TD方向に約1.0mm離れた位置にて2箇所で掃引する。これにより、筒状圧着部48に母材よりも軟質な2つの溶融部50,50が形成される。なお、溶融部/突条部を形成する工程は、条形成時(ステップS21)に行われてもよいし、条形成後であって曲げ加工(ステップS24)前のいずれかの段階で行われてもよい。   Next, laser light is irradiated from above the cylindrical crimping portion 48 to a portion corresponding to the coated crimping portion of the outer peripheral surface of the cylindrical crimping portion. Then, laser light is swept along the circumferential direction of the cylindrical crimping portion 48, and a part of the cylindrical crimping portion 48 is melted and solidified in a linear shape, thereby penetrating in the thickness direction of the cylindrical crimping portion 48. Thus, the two melted portions 50 and 50 are formed (step S25, FIG. 4 (f)). Note that, as described above, two ridges may be formed on the inner peripheral surface of the cylindrical crimping portion 48 at the time of laser irradiation in this step. Formation of the melted portion / ridge portion in this step can be executed using the same laser light as that used in step S24, for example, with the same laser driving conditions, sweep speed, and spot diameter. The laser beam sweep direction is the RD direction, that is, the direction perpendicular to the longitudinal direction of the cylindrical crimping part 48 (the direction of arrow C in the figure), and is two locations at a position about 1.0 mm apart in the TD direction. Sweep with. Thereby, two melting parts 50 and 50 softer than the base material are formed in the cylindrical crimp part 48. The process of forming the melted portion / ridge portion may be performed at the time of forming the stripe (step S21), or performed at any stage after the formation of the stripe and before the bending process (step S24). May be.

図3及び図4に示す工程により、内周面に2つの溶融部を有する筒状圧着部と、トランジション部を介して一体成形されたコネクタ部とを有する端子が作製される。   3 and 4, a terminal having a cylindrical crimping portion having two melting portions on the inner peripheral surface and a connector portion integrally formed via the transition portion is manufactured.

本実施形態では、溶融部36a,36aは、筒状圧着部30の長手方向に対して略垂直に延在しているが、これに限らず、例えば図5(a),(b)に示すように、2つの帯状の溶融部38a,38aのうち一方の溶融部が、他方の溶融部と交差して設けられてもよい。また、筒状圧着部30’のうち被覆圧着部32’の内周面32a’に、一方の突条部が他方の突条部と交差した2つの突条部38,38が形成されてもよい。このような溶融部又は突条部を形成することによっても、被覆圧着部32’と電線の絶縁被覆との界面に生じる微小隙間を埋めることができる。   In the present embodiment, the melted portions 36a and 36a extend substantially perpendicular to the longitudinal direction of the cylindrical crimp portion 30. However, the present invention is not limited to this, for example, as shown in FIGS. 5 (a) and 5 (b). As described above, one of the two strip-shaped melting portions 38a, 38a may be provided so as to intersect with the other melting portion. Moreover, even if two protrusions 38 and 38 in which one protrusion intersects with the other protrusion are formed on the inner peripheral surface 32a ′ of the covering contact bonding part 32 ′ of the tubular crimping part 30 ′. Good. By forming such a melted portion or protruding portion, it is possible to fill a minute gap generated at the interface between the coated crimp portion 32 ′ and the insulating coating of the electric wire.

上述したように、本実施形態によれば、被覆圧着部32は、その厚さ方向に貫通して設けられ且つ周方向に沿って形成された2つの溶融部36a,36aを有するので、端子1に電線を圧着する際、被覆圧着部32の内周面32aと電線の外周面との密着性が向上し、これらの界面における長手方向の水分の侵入が阻止される。よって、長期間に亘って止水性を実現することができ、機械的、電気的な接続信頼性を向上することができる。また、長期間に亘る止水性の実現により、端子1と導体間での異種金属間腐食や隙間腐食を防止することが可能となる。また、被覆圧着部32は、その内周面32aに設けられ且つ該内周面の周方向に沿って形成された突条部36,36を有することによっても、上記と同様の効果を奏することができる。また、溶融部36a,36a又は突条部36,36は、被覆圧着部30に一体的に設けられ、被覆圧着部32と同一組成であり且つ該筒状圧着部よりも軟質であるので、溶融部36a,36a又は突条部36,36の延性により、圧着時にこれらが変形して被覆圧着部32の内周面32aと電線の外周面との間の隙間を埋めることができ、止水性を更に向上することができる。   As described above, according to the present embodiment, the covering crimping portion 32 includes the two melting portions 36a and 36a that are provided so as to penetrate in the thickness direction and are formed along the circumferential direction. When crimping an electric wire, the adhesion between the inner peripheral surface 32a of the coated crimping part 32 and the outer peripheral surface of the electric wire is improved, and the penetration of moisture in the longitudinal direction at these interfaces is prevented. Therefore, it is possible to achieve water-stopping performance for a long period of time, and to improve mechanical and electrical connection reliability. In addition, the realization of water-stopping performance over a long period of time can prevent dissimilar metal corrosion and crevice corrosion between the terminal 1 and the conductor. The covering crimping portion 32 also has the same effect as described above by having the ridges 36, 36 provided on the inner peripheral surface 32a and formed along the circumferential direction of the inner peripheral surface. Can do. Further, the melting portions 36a, 36a or the ridge portions 36, 36 are provided integrally with the covering crimping portion 30 and have the same composition as the covering crimping portion 32 and are softer than the cylindrical crimping portion. Due to the ductility of the portions 36a, 36a or the ridges 36, 36, they can be deformed during crimping to fill the gap between the inner peripheral surface 32a of the coated crimping portion 32 and the outer peripheral surface of the electric wire, thereby preventing water-stopping. Further improvement can be achieved.

また、帯状に形成された2つの溶融部36a,36aが、それぞれ被覆圧着部32の長手方向に対して垂直に延在するか(図1)、或いは帯状に形成された2つの溶融部38a,38aが互いに交差して延在するので(図5)、筒状圧着部30の長手方向に進行する水分に対して複数段の堰部を形成することができ、筒状圧着部30内に収容された導体に水分が到達するのを確実に阻止することができる。また、2つの突条部36a,36aが、それぞれ被覆圧着部32の長手方向に対して垂直に延在するか、或いは2つの38a,38aが被覆圧着部32’の内表面32a’に互いに交差して延在することによっても、上記同様の効果を奏することができる。   In addition, the two melting portions 36a, 36a formed in a band shape extend perpendicularly to the longitudinal direction of the covering crimping portion 32 (FIG. 1), or two melting portions 38a, 38a extend so as to intersect with each other (FIG. 5), so that a plurality of dam portions can be formed with respect to moisture traveling in the longitudinal direction of the tubular crimping portion 30, and accommodated in the tubular crimping portion 30. It is possible to reliably prevent moisture from reaching the formed conductor. In addition, the two protrusions 36a and 36a each extend perpendicularly to the longitudinal direction of the coated crimping portion 32, or the two 38a and 38a intersect each other with the inner surface 32a ′ of the coated crimped portion 32 ′. Thus, the same effect as described above can be obtained.

また、筒状圧着部48の外周面のうち被覆圧着部に相当する部分にレーザ光を照射しながら筒状圧着部48の周方向に沿ってレーザ光を掃引し、筒状圧着部48の一部を溶融して固化することにより、筒状圧着部48の厚さ方向に貫通して設けられた2つの溶融部50,50を形成する。これにより、止水性を更に向上することができると共に、筒状圧着部48を形成する際に用いられるレーザ光を使用して2つの溶融部50,50を形成するので、溶融部50,50を形成するための他の金属材料や装置を必要とせず、溶融部50,50を容易に形成することができ、生産性に優れる。   In addition, the laser light is swept along the circumferential direction of the cylindrical pressure-bonding portion 48 while irradiating a portion of the outer peripheral surface of the cylindrical pressure-bonding portion 48 corresponding to the cover pressure-bonding portion with the laser light. By melting and solidifying the part, two melting parts 50 and 50 provided penetrating in the thickness direction of the cylindrical crimp part 48 are formed. As a result, the water-stopping property can be further improved, and the two melting portions 50 and 50 are formed using the laser light used when forming the cylindrical crimping portion 48. It is possible to easily form the melted portions 50 and 50 without using other metal materials and apparatuses for forming, and the productivity is excellent.

以上、上記実施形態に係る端子およびその製造方法について述べたが、本発明は記述の実施形態に限定されるものではなく、本発明の技術思想に基づいて各種の変形および変更が可能である。   As mentioned above, although the terminal concerning the said embodiment and its manufacturing method were described, this invention is not limited to described embodiment, Various deformation | transformation and change are possible based on the technical idea of this invention.

例えば、図6に示すように、端子が筒状圧着部に段差形状を有していてもよい。具体的には、筒状圧着部60が、トランジション部20側が閉塞された筒部材であって、不図示の電線の絶縁被覆と圧着される被覆圧着部62と、挿入口61側からトランジション部20側に向かって縮径する縮径部63と、電線の導体と圧着される導体圧着部64と、挿入口61側からトランジション部20側に向かって更に縮径し、その端部が溶接により閉塞される縮径部65とを有していてもよい。この場合、被覆圧着部62の外周面62bに溶融部66a、66aが形成され、また、被覆圧着部62の内周面62aに、筒状圧着部60の長手方向に対して直角に延在する2つの突条部66,66が形成される。   For example, as shown in FIG. 6, the terminal may have a step shape in the cylindrical crimp portion. Specifically, the cylindrical crimping portion 60 is a cylindrical member closed on the transition portion 20 side, and a coated crimping portion 62 to be crimped to an insulation coating of an unillustrated electric wire, and the transition portion 20 from the insertion port 61 side. The diameter-reducing portion 63 that is reduced in diameter toward the side, the conductor crimping portion 64 that is crimped to the conductor of the electric wire, and the diameter is further reduced from the insertion port 61 side toward the transition portion 20 side, and the end portion is closed by welding. The reduced diameter portion 65 may be included. In this case, melted portions 66 a and 66 a are formed on the outer peripheral surface 62 b of the coated crimping portion 62, and the inner circumferential surface 62 a of the coated crimped portion 62 extends at right angles to the longitudinal direction of the tubular crimped portion 60. Two ridges 66, 66 are formed.

筒状圧着部60が段差形状を有することで、電線端部の絶縁被覆を除去して当該端部を筒状圧着部60に挿入したとき、電線の絶縁被覆が縮径部63で係止され、これにより被覆圧着部62の直下に絶縁被覆が位置し、導体圧着部64の直下に導体が位置する。したがって、電線端部の位置決めを容易に行うことができ、被覆圧着部62と絶縁被覆との圧着、および導体圧着部64と導体の圧着を確実に行うことが可能となり、良好な止水性および電気的接続を両立して、優れた密着性を実現することができる。更に、被覆圧着部62に2つの溶融部66a、66a又は突条部66,66が形成されるので、圧着時に被覆圧着部62と導体との間の空隙を埋めることができ、被覆圧着部62における止水性を向上することができる。   Since the cylindrical crimping portion 60 has a stepped shape, when the insulating coating at the end of the electric wire is removed and the end is inserted into the cylindrical crimping portion 60, the insulating coating of the electric wire is locked by the reduced diameter portion 63. As a result, the insulation coating is positioned directly below the coating crimping portion 62, and the conductor is positioned directly below the conductor crimping portion 64. Therefore, the end of the electric wire can be easily positioned, and the crimping of the covering crimping part 62 and the insulating coating and the crimping of the conductor crimping part 64 and the conductor can be reliably performed. It is possible to achieve excellent adhesiveness while achieving simultaneous connection. Further, since the two melted portions 66a and 66a or the ridge portions 66 and 66 are formed in the covering crimping portion 62, the gap between the covering crimping portion 62 and the conductor can be filled at the time of crimping. It is possible to improve the water stoppage.

また、本実施形態における端子と電線とを圧着して接続構造体を製造する際には、例えば、図7に示すような一対の金型を用いて端子を上下方向に加締める。具体的には、導体81を露出させた電線80を筒状圧着部70に挿入した状態で、メス金型100aとオス金型100bで筒状圧着部70を押圧する。これにより、筒状圧着部70は一対の金型の内面形状に沿って塑性変形し、導体81と導体圧着部(不図示)が圧着されると共に、絶縁被覆82と被覆圧着部72が圧着される。その後、必要に応じて導体81と導体圧着部との圧着部分に強加工が行われる。   Moreover, when crimping the terminal and electric wire in this embodiment and manufacturing a connection structure, a terminal is crimped up and down using a pair of metal mold | die as shown, for example in FIG. Specifically, the tubular crimping portion 70 is pressed by the female die 100a and the male die 100b with the electric wire 80 with the conductor 81 exposed being inserted into the tubular crimping portion 70. Thereby, the cylindrical crimping portion 70 is plastically deformed along the inner surface shape of the pair of molds, the conductor 81 and the conductor crimping portion (not shown) are crimped, and the insulating coating 82 and the coating crimping portion 72 are crimped. The Thereafter, strong processing is performed on the crimping portion between the conductor 81 and the conductor crimping portion as necessary.

図7に示すような形状の金型を使用した場合、筒状圧着部70、特に被覆圧着部72の外周面72bには、メス金型100aとオス金型100bの2箇所の境界部に対応する位置にそれぞれ凸部73,73が形成される(図8(a))。凸部73,73は、筒状圧着部70の長手方向に延在している。この凸部73の形成に伴い、被覆圧着部72の内周面72a上に、凸部73,73に対応する位置に微小溝74,74が形成されることがある(図8(b))。微小溝74,74は、凸部73,73と同様、筒状圧着部70の長手方向に延在するため、被覆圧着部72での止水性に影響を与えるという懸念がある。そこで本実施形態では、微小溝74,74が形成される位置を推測し、レーザ照射により、被覆圧着部72の内周面72bに予め突条部75,75を形成する。このとき、被覆圧着部72の外周面72bには突条部75,75に対応する位置に溶融部75a,75aが形成される。突条部75は、微小溝74を横切って延在するように形成され、好ましくは微小溝74に対して略垂直に延在するように形成される。本構成によれば、圧着時に被覆圧着部72の内周面72aに微小溝74が形成された場合であっても、微小溝74と溶融部75a又は突条部75との交差位置Pで当該微小溝を分断することができ、微小溝74を介して水分が外部から筒状圧着部70内に侵入するのを確実に防止することが可能となる。また、微小溝74と溶融部75a又は突条部75との交差位置Pを複数設けることにより、止水性を更に向上することができる。   When a mold having a shape as shown in FIG. 7 is used, the outer peripheral surface 72b of the cylindrical crimping portion 70, particularly the covering crimping portion 72, corresponds to two boundary portions of the female die 100a and the male die 100b. Protrusions 73 and 73 are formed at the positions to be (FIG. 8A). The convex portions 73, 73 extend in the longitudinal direction of the cylindrical crimp portion 70. Along with the formation of the convex portion 73, minute grooves 74, 74 may be formed on the inner peripheral surface 72a of the cover crimping portion 72 at positions corresponding to the convex portions 73, 73 (FIG. 8B). . Since the minute grooves 74 and 74 extend in the longitudinal direction of the tubular crimping portion 70, similarly to the convex portions 73 and 73, there is a concern that the water stoppage at the coated crimping portion 72 is affected. Therefore, in the present embodiment, the positions where the minute grooves 74 and 74 are formed are estimated, and the ridge portions 75 and 75 are formed in advance on the inner peripheral surface 72b of the covering crimping portion 72 by laser irradiation. At this time, melted portions 75 a and 75 a are formed on the outer peripheral surface 72 b of the covering crimping portion 72 at positions corresponding to the ridge portions 75 and 75. The protrusion 75 is formed so as to extend across the minute groove 74, and preferably formed so as to extend substantially perpendicular to the minute groove 74. According to this configuration, even when the minute groove 74 is formed on the inner peripheral surface 72a of the cover crimping portion 72 at the time of crimping, the minute groove 74 and the melted portion 75a or the ridge portion 75 at the intersection P The minute groove can be divided, and it is possible to reliably prevent moisture from entering the cylindrical crimping portion 70 from the outside through the minute groove 74. Further, by providing a plurality of intersecting positions P between the minute grooves 74 and the melting portions 75a or the ridge portions 75, the water stoppage can be further improved.

また、上記実施形態において、電線の導体がアルミニウムあるいはアルミニウム合金からなるものであってもよく、また、銅又は銅合金からなるものであってもよい。また、これらの材料からなる導体を有する電線と上記端子とで接続構造体を構成してもよいし、該接続構造体を有するワイヤーハーネスを構成してもよい。   Moreover, in the said embodiment, the conductor of an electric wire may consist of aluminum or an aluminum alloy, and may consist of copper or a copper alloy. Moreover, a connection structure may be comprised by the electric wire which has the conductor which consists of these materials, and the said terminal, and the wire harness which has this connection structure may be comprised.

1 端子
10 コネクタ部
11 収容口
20 トランジション部
30 筒状圧着部
30’ 筒状圧着部
31 挿入口
32 被覆圧着部
32’ 被覆圧着部
32a 内周面
32a’ 内周面
32b 外周面
33 導体圧着部
34 縮径部
35a 溶接部
36 突条部
36’ 突条部
36a 溶融部
36a’ 溶融部
37 端部溶接部
38a 溶融部
41 板材
42a キャリア部
42b 送り穴
43 コネクタ部用板状体
44 圧着部用板状体
45 コネクタ部
46 圧着部用筒状体
47 突き合わせ部
48 筒状圧着部
49 端部溶接部
50 溶融部
60 筒状圧着部
61 挿入口
62 被覆圧着部
62a 内周面
63 縮径部
64 導体圧着部
65 縮径部
66 突条部
66a 溶融部
70 筒状圧着部
72 被覆圧着部
72a 内周面
72b 外周面
73 凸部
74 微小溝
75 突条部
75a 溶融部
80 電線
81 導体
82 絶縁被覆
100a メス金型
100b オス金型
1 Terminal 10 Connector 11 Housing Port 20 Transition Port 30 Cylindrical Crimping Portion 30 ′ Cylindrical Crimping Portion 31 Insertion Port 32 Cover Crimping Portion 32 ′ Cover Crimping Portion 32a Inner Peripheral Surface 32a ′ Inner Peripheral Surface 32b Outer Peripheral Surface 33 34 Reduced diameter portion 35a Welding portion 36 Projection portion 36 'Projection portion 36a Melting portion 36a' Melting portion 37 End welding portion 38a Melting portion 41 Plate material 42a Carrier portion 42b Feed hole 43 Connector-like plate 44 For crimping portion Plate-like body 45 Connector part 46 Crimping part cylindrical body 47 Butt part 48 Cylindrical crimping part 49 End welding part 50 Melting part 60 Cylindrical crimping part 61 Insertion port 62 Covering crimping part 62a Inner peripheral surface 63 Reduced diameter part 64 Conductor crimping part 65 Reduced diameter part 66 Projection part 66a Melting part 70 Cylindrical crimping part 72 Covering crimping part 72a Inner peripheral surface 72b Outer peripheral surface 73 Convex part 74 Micro groove 75 Projection part 75a Melting part 80 Electric wire 81 Conductor 82 Insulation coating 100a Female mold 100b Male mold

Claims (14)

外部端子と電気的に接続されるコネクタ部と、前記コネクタ部と一体的に形成されるか又は別体で連結され、電線と圧着される筒状圧着部とを備える端子であって、
前記筒状圧着部は、突き合わせ溶接によってその長手方向に沿って形成された溶接部と、その厚さ方向に貫通して設けられ且つ周方向に沿って形成された少なくとも1つの溶融部とを有し、
前記筒状圧着部は、帯状に形成された複数の溶融部を有し、
前記複数の溶融部のうち一の溶融部が、他の溶融部と交差して設けられることを特徴とする端子。
A connector part electrically connected to an external terminal, and a terminal provided with a cylindrical crimp part that is formed integrally with the connector part or connected separately and crimped to an electric wire,
The cylindrical crimping portion has a welded portion formed along the longitudinal direction by butt welding and at least one molten portion provided through the thickness direction and formed along the circumferential direction. And
The cylindrical crimping portion has a plurality of melting portions formed in a band shape,
The one of the melting portion of the plurality of molten portions, characterized in Rukoto provided to intersect with other melt unit terminal.
前記溶融部は、前記筒状圧着部と一体的に設けられ、前記筒状圧着部と同一組成であり且つ該筒状圧着部よりも軟質であることを特徴とする、請求項1記載の端子。   2. The terminal according to claim 1, wherein the melting portion is provided integrally with the cylindrical crimping portion, has the same composition as the cylindrical crimping portion, and is softer than the cylindrical crimping portion. . 前記筒状圧着部は、帯状に形成された複数の溶融部を有し、
前記複数の溶融部が、それぞれ前記筒状圧着部の長手方向に対して略垂直に延在することを特徴とする、請求項1又は2記載の端子。
The cylindrical crimping portion has a plurality of melting portions formed in a band shape,
3. The terminal according to claim 1, wherein each of the plurality of melting portions extends substantially perpendicularly to a longitudinal direction of the cylindrical crimp portion.
前記筒状圧着部は、電線の絶縁被覆と圧着される被覆圧着部と、該被覆圧着部から前記コネクタ部側に向かって縮径する縮径部と、前記縮径部の更にコネクタ部側に形成され、前記電線の導体と圧着される導体圧着部とを有し、
前記溶融部が、前記被覆圧着部の厚み方向に貫通して設けられ且つ周方向に沿って形成されることを特徴とする、請求項1からのいずれか1項に記載の端子。
The cylindrical crimping portion includes a coated crimping portion to be crimped to the insulation coating of the electric wire, a reduced diameter portion that reduces the diameter from the coated crimped portion toward the connector portion, and further to the connector portion side of the reduced diameter portion. Formed and having a conductor crimping portion to be crimped to the conductor of the electric wire,
The molten portion, the penetrating in the thickness direction of the insulation crimp portion, characterized in that it is formed in and along the circumferential direction are provided, according to any one of claims 1 to 3 terminal.
外部端子と電気的に接続されるコネクタ部と、前記コネクタ部と一体的に形成されるか又は別体で連結され、電線と圧着される筒状圧着部とを備える端子であって、A connector part electrically connected to an external terminal, and a terminal provided with a cylindrical crimp part that is formed integrally with the connector part or connected separately and crimped to an electric wire,
前記筒状圧着部は、突き合わせ溶接によってその長手方向に沿って形成された溶接部と、その厚さ方向に貫通して設けられ且つ周方向に沿って形成された少なくとも1つの溶融部とを有し、The cylindrical crimping portion has a welded portion formed along the longitudinal direction by butt welding and at least one molten portion provided through the thickness direction and formed along the circumferential direction. And
前記筒状圧着部は、帯状に形成された溶融部を有し、The cylindrical crimp part has a melted part formed in a band shape,
前記溶融部は、前記溶接部と離間した位置に形成されていることを特徴とする端子。The fusion terminal is formed at a position separated from the welded part.
外部端子と電気的に接続されるコネクタ部と、前記コネクタ部と一体的に形成されるか又は別体で連結され、電線と圧着される筒状圧着部とを備える端子と、
前記端子の前記筒状圧着部に圧着された電線と、
を備える接続構造体であって、
前記筒状圧着部は、突き合わせ溶接によってその長手方向に沿って形成された溶接部と、前記端子と前記電線が圧着された状態で、その内周面に設けられ且つ該内周面の周方向に沿って形成された少なくとも1つの突条部とを有し、
前記突条部は、前記筒状圧着部と一体的に設けられ、前記筒状圧着部と同一組成であり且つ該筒状圧着部よりも軟質であることを特徴とする接続構造体
A connector part electrically connected to the external terminal, a terminal provided integrally with the connector part or connected separately, and a cylindrical crimp part crimped to the electric wire ;
An electric wire crimped to the cylindrical crimp portion of the terminal;
A connection structure comprising :
The cylindrical crimping portion is provided on the inner circumferential surface of the welded portion formed along the longitudinal direction by butt welding, the terminal and the electric wire are crimped, and the circumferential direction of the inner circumferential surface. It possesses at least one ridge formed along a,
The ridges, the tubular crimp portion provided integrally with the cylindrical crimping portion is the same composition as and connecting structure characterized soft der Rukoto than cylindrical crimping portion.
前記筒状圧着部は複数の突条部を有し、
前記複数の突条部が、それぞれ前記筒状圧着部の長手方向に対して略垂直に延在することを特徴とする、請求項6記載の接続構造体
The cylindrical crimp part has a plurality of ridges,
Wherein the plurality of protrusions, respectively, characterized in that extending substantially perpendicularly to the longitudinal direction of the tubular crimp portion, claim 6 Symbol mounting of the connection structure.
前記筒状圧着部は複数の突条部を有し、
前記複数の突条部のうち一の突条部が、他の突条部と交差して設けられることを特徴とする、請求項6記載の接続構造体
The cylindrical crimp part has a plurality of ridges,
The one ridge of the plurality of protrusions, characterized in that provided cross other protrusions, claim 6 Symbol mounting of the connection structure.
前記筒状圧着部は、電線の絶縁被覆と圧着される被覆圧着部と、該被覆圧着部から前記コネクタ部側に向かって縮径する縮径部と、前記縮径部の更にコネクタ部側に形成され、前記電線の導体と圧着される導体圧着部とを有し、
前記突条部が、前記被覆圧着部の内周面に設けられ且つ該内周面の周方向に沿って形成されることを特徴とする、請求項6からのいずれか1項に記載の接続構造体
The cylindrical crimping portion includes a coated crimping portion to be crimped to the insulation coating of the electric wire, a reduced diameter portion that reduces the diameter from the coated crimped portion toward the connector portion, and further to the connector portion side of the reduced diameter portion. Formed and having a conductor crimping portion to be crimped to the conductor of the electric wire,
The said protrusion part is provided in the internal peripheral surface of the said coating crimping | compression-bonding part, and is formed along the circumferential direction of this internal peripheral surface, It is any one of Claim 6 to 8 characterized by the above-mentioned. Connection structure .
前記筒状圧着部の前記コネクタ部側の端部が閉塞されていることを特徴とする、請求項乃至のいずれか1項に記載の接続構造体The connection structure according to any one of claims 6 to 9 , wherein an end of the cylindrical crimp portion on the connector portion side is closed. 前記電線の導体が、電線の導体又は該導体を複数本撚り合わせて得られる導体撚線であることを特徴とする、請求項6乃至10のいずれか1項に記載の接続構造体。 The connection structure according to any one of claims 6 to 10, wherein the conductor of the electric wire is a conductor of the electric wire or a conductor stranded wire obtained by twisting a plurality of the conductors. 前記電線の導体がアルミニウム又はアルミニウム合金からなる、請求項6乃至11のいずれか1項に記載の接続構造体。 The connection structure according to claim 6 , wherein the conductor of the electric wire is made of aluminum or an aluminum alloy. 請求項6乃至12のいずれか1項に記載の接続構造体を少なくとも1つ備えるワイヤーハーネス。 A wire harness comprising at least one connection structure according to any one of claims 6 to 12 . 外部端子と電気的に接続されるコネクタ部と、前記コネクタ部と一体的又は別体で連結され、電線と圧着される筒状圧着部とを備える端子の製造方法であって、
金属板材に曲げ加工を施し、前記金属板材の両側縁部を突き合わせて筒状体を成形する工程と、
前記筒状体の突き合わせ部をレーザ溶接し、前記筒状体の長手方向に沿って溶接部を形成しながら筒状圧着部を形成する工程と、
前記筒状圧着部の外周面にレーザ光を照射し、前記筒状圧着部の周方向に沿ってレーザ光を掃引し、前記筒状圧着部の一部を溶融して固化することにより、前記筒状圧着部の厚さ方向に貫通して設けられた少なくとも1つの溶融部を形成することを特徴とする端子の製造方法。
A connector part that is electrically connected to an external terminal, and a manufacturing method of a terminal comprising a cylindrical crimp part that is integrally or separately connected to the connector part and crimped to an electric wire,
Bending the metal plate material, butting both side edges of the metal plate material to form a tubular body;
Laser welding the butted portion of the cylindrical body, forming a cylindrical crimping portion while forming a welded portion along the longitudinal direction of the cylindrical body; and
By irradiating the outer peripheral surface of the cylindrical crimping part with laser light, sweeping the laser light along the circumferential direction of the cylindrical crimping part, and melting and solidifying a part of the cylindrical crimping part, A method of manufacturing a terminal, comprising: forming at least one melted portion provided penetrating in a thickness direction of a cylindrical crimp portion.
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